File: | clang/lib/Sema/SemaExpr.cpp |
Warning: | line 7487, column 10 Called C++ object pointer is null |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | //===--- SemaExpr.cpp - Semantic Analysis for Expressions -----------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file implements semantic analysis for expressions. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "TreeTransform.h" | |||
14 | #include "UsedDeclVisitor.h" | |||
15 | #include "clang/AST/ASTConsumer.h" | |||
16 | #include "clang/AST/ASTContext.h" | |||
17 | #include "clang/AST/ASTLambda.h" | |||
18 | #include "clang/AST/ASTMutationListener.h" | |||
19 | #include "clang/AST/CXXInheritance.h" | |||
20 | #include "clang/AST/DeclObjC.h" | |||
21 | #include "clang/AST/DeclTemplate.h" | |||
22 | #include "clang/AST/EvaluatedExprVisitor.h" | |||
23 | #include "clang/AST/Expr.h" | |||
24 | #include "clang/AST/ExprCXX.h" | |||
25 | #include "clang/AST/ExprObjC.h" | |||
26 | #include "clang/AST/ExprOpenMP.h" | |||
27 | #include "clang/AST/OperationKinds.h" | |||
28 | #include "clang/AST/RecursiveASTVisitor.h" | |||
29 | #include "clang/AST/TypeLoc.h" | |||
30 | #include "clang/Basic/Builtins.h" | |||
31 | #include "clang/Basic/PartialDiagnostic.h" | |||
32 | #include "clang/Basic/SourceManager.h" | |||
33 | #include "clang/Basic/TargetInfo.h" | |||
34 | #include "clang/Lex/LiteralSupport.h" | |||
35 | #include "clang/Lex/Preprocessor.h" | |||
36 | #include "clang/Sema/AnalysisBasedWarnings.h" | |||
37 | #include "clang/Sema/DeclSpec.h" | |||
38 | #include "clang/Sema/DelayedDiagnostic.h" | |||
39 | #include "clang/Sema/Designator.h" | |||
40 | #include "clang/Sema/Initialization.h" | |||
41 | #include "clang/Sema/Lookup.h" | |||
42 | #include "clang/Sema/Overload.h" | |||
43 | #include "clang/Sema/ParsedTemplate.h" | |||
44 | #include "clang/Sema/Scope.h" | |||
45 | #include "clang/Sema/ScopeInfo.h" | |||
46 | #include "clang/Sema/SemaFixItUtils.h" | |||
47 | #include "clang/Sema/SemaInternal.h" | |||
48 | #include "clang/Sema/Template.h" | |||
49 | #include "llvm/ADT/STLExtras.h" | |||
50 | #include "llvm/ADT/StringExtras.h" | |||
51 | #include "llvm/Support/ConvertUTF.h" | |||
52 | #include "llvm/Support/SaveAndRestore.h" | |||
53 | ||||
54 | using namespace clang; | |||
55 | using namespace sema; | |||
56 | using llvm::RoundingMode; | |||
57 | ||||
58 | /// Determine whether the use of this declaration is valid, without | |||
59 | /// emitting diagnostics. | |||
60 | bool Sema::CanUseDecl(NamedDecl *D, bool TreatUnavailableAsInvalid) { | |||
61 | // See if this is an auto-typed variable whose initializer we are parsing. | |||
62 | if (ParsingInitForAutoVars.count(D)) | |||
63 | return false; | |||
64 | ||||
65 | // See if this is a deleted function. | |||
66 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
67 | if (FD->isDeleted()) | |||
68 | return false; | |||
69 | ||||
70 | // If the function has a deduced return type, and we can't deduce it, | |||
71 | // then we can't use it either. | |||
72 | if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() && | |||
73 | DeduceReturnType(FD, SourceLocation(), /*Diagnose*/ false)) | |||
74 | return false; | |||
75 | ||||
76 | // See if this is an aligned allocation/deallocation function that is | |||
77 | // unavailable. | |||
78 | if (TreatUnavailableAsInvalid && | |||
79 | isUnavailableAlignedAllocationFunction(*FD)) | |||
80 | return false; | |||
81 | } | |||
82 | ||||
83 | // See if this function is unavailable. | |||
84 | if (TreatUnavailableAsInvalid && D->getAvailability() == AR_Unavailable && | |||
85 | cast<Decl>(CurContext)->getAvailability() != AR_Unavailable) | |||
86 | return false; | |||
87 | ||||
88 | if (isa<UnresolvedUsingIfExistsDecl>(D)) | |||
89 | return false; | |||
90 | ||||
91 | return true; | |||
92 | } | |||
93 | ||||
94 | static void DiagnoseUnusedOfDecl(Sema &S, NamedDecl *D, SourceLocation Loc) { | |||
95 | // Warn if this is used but marked unused. | |||
96 | if (const auto *A = D->getAttr<UnusedAttr>()) { | |||
97 | // [[maybe_unused]] should not diagnose uses, but __attribute__((unused)) | |||
98 | // should diagnose them. | |||
99 | if (A->getSemanticSpelling() != UnusedAttr::CXX11_maybe_unused && | |||
100 | A->getSemanticSpelling() != UnusedAttr::C2x_maybe_unused) { | |||
101 | const Decl *DC = cast_or_null<Decl>(S.getCurObjCLexicalContext()); | |||
102 | if (DC && !DC->hasAttr<UnusedAttr>()) | |||
103 | S.Diag(Loc, diag::warn_used_but_marked_unused) << D; | |||
104 | } | |||
105 | } | |||
106 | } | |||
107 | ||||
108 | /// Emit a note explaining that this function is deleted. | |||
109 | void Sema::NoteDeletedFunction(FunctionDecl *Decl) { | |||
110 | assert(Decl && Decl->isDeleted())(static_cast <bool> (Decl && Decl->isDeleted ()) ? void (0) : __assert_fail ("Decl && Decl->isDeleted()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 110, __extension__ __PRETTY_FUNCTION__)); | |||
111 | ||||
112 | if (Decl->isDefaulted()) { | |||
113 | // If the method was explicitly defaulted, point at that declaration. | |||
114 | if (!Decl->isImplicit()) | |||
115 | Diag(Decl->getLocation(), diag::note_implicitly_deleted); | |||
116 | ||||
117 | // Try to diagnose why this special member function was implicitly | |||
118 | // deleted. This might fail, if that reason no longer applies. | |||
119 | DiagnoseDeletedDefaultedFunction(Decl); | |||
120 | return; | |||
121 | } | |||
122 | ||||
123 | auto *Ctor = dyn_cast<CXXConstructorDecl>(Decl); | |||
124 | if (Ctor && Ctor->isInheritingConstructor()) | |||
125 | return NoteDeletedInheritingConstructor(Ctor); | |||
126 | ||||
127 | Diag(Decl->getLocation(), diag::note_availability_specified_here) | |||
128 | << Decl << 1; | |||
129 | } | |||
130 | ||||
131 | /// Determine whether a FunctionDecl was ever declared with an | |||
132 | /// explicit storage class. | |||
133 | static bool hasAnyExplicitStorageClass(const FunctionDecl *D) { | |||
134 | for (auto I : D->redecls()) { | |||
135 | if (I->getStorageClass() != SC_None) | |||
136 | return true; | |||
137 | } | |||
138 | return false; | |||
139 | } | |||
140 | ||||
141 | /// Check whether we're in an extern inline function and referring to a | |||
142 | /// variable or function with internal linkage (C11 6.7.4p3). | |||
143 | /// | |||
144 | /// This is only a warning because we used to silently accept this code, but | |||
145 | /// in many cases it will not behave correctly. This is not enabled in C++ mode | |||
146 | /// because the restriction language is a bit weaker (C++11 [basic.def.odr]p6) | |||
147 | /// and so while there may still be user mistakes, most of the time we can't | |||
148 | /// prove that there are errors. | |||
149 | static void diagnoseUseOfInternalDeclInInlineFunction(Sema &S, | |||
150 | const NamedDecl *D, | |||
151 | SourceLocation Loc) { | |||
152 | // This is disabled under C++; there are too many ways for this to fire in | |||
153 | // contexts where the warning is a false positive, or where it is technically | |||
154 | // correct but benign. | |||
155 | if (S.getLangOpts().CPlusPlus) | |||
156 | return; | |||
157 | ||||
158 | // Check if this is an inlined function or method. | |||
159 | FunctionDecl *Current = S.getCurFunctionDecl(); | |||
160 | if (!Current) | |||
161 | return; | |||
162 | if (!Current->isInlined()) | |||
163 | return; | |||
164 | if (!Current->isExternallyVisible()) | |||
165 | return; | |||
166 | ||||
167 | // Check if the decl has internal linkage. | |||
168 | if (D->getFormalLinkage() != InternalLinkage) | |||
169 | return; | |||
170 | ||||
171 | // Downgrade from ExtWarn to Extension if | |||
172 | // (1) the supposedly external inline function is in the main file, | |||
173 | // and probably won't be included anywhere else. | |||
174 | // (2) the thing we're referencing is a pure function. | |||
175 | // (3) the thing we're referencing is another inline function. | |||
176 | // This last can give us false negatives, but it's better than warning on | |||
177 | // wrappers for simple C library functions. | |||
178 | const FunctionDecl *UsedFn = dyn_cast<FunctionDecl>(D); | |||
179 | bool DowngradeWarning = S.getSourceManager().isInMainFile(Loc); | |||
180 | if (!DowngradeWarning && UsedFn) | |||
181 | DowngradeWarning = UsedFn->isInlined() || UsedFn->hasAttr<ConstAttr>(); | |||
182 | ||||
183 | S.Diag(Loc, DowngradeWarning ? diag::ext_internal_in_extern_inline_quiet | |||
184 | : diag::ext_internal_in_extern_inline) | |||
185 | << /*IsVar=*/!UsedFn << D; | |||
186 | ||||
187 | S.MaybeSuggestAddingStaticToDecl(Current); | |||
188 | ||||
189 | S.Diag(D->getCanonicalDecl()->getLocation(), diag::note_entity_declared_at) | |||
190 | << D; | |||
191 | } | |||
192 | ||||
193 | void Sema::MaybeSuggestAddingStaticToDecl(const FunctionDecl *Cur) { | |||
194 | const FunctionDecl *First = Cur->getFirstDecl(); | |||
195 | ||||
196 | // Suggest "static" on the function, if possible. | |||
197 | if (!hasAnyExplicitStorageClass(First)) { | |||
198 | SourceLocation DeclBegin = First->getSourceRange().getBegin(); | |||
199 | Diag(DeclBegin, diag::note_convert_inline_to_static) | |||
200 | << Cur << FixItHint::CreateInsertion(DeclBegin, "static "); | |||
201 | } | |||
202 | } | |||
203 | ||||
204 | /// Determine whether the use of this declaration is valid, and | |||
205 | /// emit any corresponding diagnostics. | |||
206 | /// | |||
207 | /// This routine diagnoses various problems with referencing | |||
208 | /// declarations that can occur when using a declaration. For example, | |||
209 | /// it might warn if a deprecated or unavailable declaration is being | |||
210 | /// used, or produce an error (and return true) if a C++0x deleted | |||
211 | /// function is being used. | |||
212 | /// | |||
213 | /// \returns true if there was an error (this declaration cannot be | |||
214 | /// referenced), false otherwise. | |||
215 | /// | |||
216 | bool Sema::DiagnoseUseOfDecl(NamedDecl *D, ArrayRef<SourceLocation> Locs, | |||
217 | const ObjCInterfaceDecl *UnknownObjCClass, | |||
218 | bool ObjCPropertyAccess, | |||
219 | bool AvoidPartialAvailabilityChecks, | |||
220 | ObjCInterfaceDecl *ClassReceiver) { | |||
221 | SourceLocation Loc = Locs.front(); | |||
222 | if (getLangOpts().CPlusPlus && isa<FunctionDecl>(D)) { | |||
223 | // If there were any diagnostics suppressed by template argument deduction, | |||
224 | // emit them now. | |||
225 | auto Pos = SuppressedDiagnostics.find(D->getCanonicalDecl()); | |||
226 | if (Pos != SuppressedDiagnostics.end()) { | |||
227 | for (const PartialDiagnosticAt &Suppressed : Pos->second) | |||
228 | Diag(Suppressed.first, Suppressed.second); | |||
229 | ||||
230 | // Clear out the list of suppressed diagnostics, so that we don't emit | |||
231 | // them again for this specialization. However, we don't obsolete this | |||
232 | // entry from the table, because we want to avoid ever emitting these | |||
233 | // diagnostics again. | |||
234 | Pos->second.clear(); | |||
235 | } | |||
236 | ||||
237 | // C++ [basic.start.main]p3: | |||
238 | // The function 'main' shall not be used within a program. | |||
239 | if (cast<FunctionDecl>(D)->isMain()) | |||
240 | Diag(Loc, diag::ext_main_used); | |||
241 | ||||
242 | diagnoseUnavailableAlignedAllocation(*cast<FunctionDecl>(D), Loc); | |||
243 | } | |||
244 | ||||
245 | // See if this is an auto-typed variable whose initializer we are parsing. | |||
246 | if (ParsingInitForAutoVars.count(D)) { | |||
247 | if (isa<BindingDecl>(D)) { | |||
248 | Diag(Loc, diag::err_binding_cannot_appear_in_own_initializer) | |||
249 | << D->getDeclName(); | |||
250 | } else { | |||
251 | Diag(Loc, diag::err_auto_variable_cannot_appear_in_own_initializer) | |||
252 | << D->getDeclName() << cast<VarDecl>(D)->getType(); | |||
253 | } | |||
254 | return true; | |||
255 | } | |||
256 | ||||
257 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
258 | // See if this is a deleted function. | |||
259 | if (FD->isDeleted()) { | |||
260 | auto *Ctor = dyn_cast<CXXConstructorDecl>(FD); | |||
261 | if (Ctor && Ctor->isInheritingConstructor()) | |||
262 | Diag(Loc, diag::err_deleted_inherited_ctor_use) | |||
263 | << Ctor->getParent() | |||
264 | << Ctor->getInheritedConstructor().getConstructor()->getParent(); | |||
265 | else | |||
266 | Diag(Loc, diag::err_deleted_function_use); | |||
267 | NoteDeletedFunction(FD); | |||
268 | return true; | |||
269 | } | |||
270 | ||||
271 | // [expr.prim.id]p4 | |||
272 | // A program that refers explicitly or implicitly to a function with a | |||
273 | // trailing requires-clause whose constraint-expression is not satisfied, | |||
274 | // other than to declare it, is ill-formed. [...] | |||
275 | // | |||
276 | // See if this is a function with constraints that need to be satisfied. | |||
277 | // Check this before deducing the return type, as it might instantiate the | |||
278 | // definition. | |||
279 | if (FD->getTrailingRequiresClause()) { | |||
280 | ConstraintSatisfaction Satisfaction; | |||
281 | if (CheckFunctionConstraints(FD, Satisfaction, Loc)) | |||
282 | // A diagnostic will have already been generated (non-constant | |||
283 | // constraint expression, for example) | |||
284 | return true; | |||
285 | if (!Satisfaction.IsSatisfied) { | |||
286 | Diag(Loc, | |||
287 | diag::err_reference_to_function_with_unsatisfied_constraints) | |||
288 | << D; | |||
289 | DiagnoseUnsatisfiedConstraint(Satisfaction); | |||
290 | return true; | |||
291 | } | |||
292 | } | |||
293 | ||||
294 | // If the function has a deduced return type, and we can't deduce it, | |||
295 | // then we can't use it either. | |||
296 | if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() && | |||
297 | DeduceReturnType(FD, Loc)) | |||
298 | return true; | |||
299 | ||||
300 | if (getLangOpts().CUDA && !CheckCUDACall(Loc, FD)) | |||
301 | return true; | |||
302 | ||||
303 | if (getLangOpts().SYCLIsDevice && !checkSYCLDeviceFunction(Loc, FD)) | |||
304 | return true; | |||
305 | } | |||
306 | ||||
307 | if (auto *MD = dyn_cast<CXXMethodDecl>(D)) { | |||
308 | // Lambdas are only default-constructible or assignable in C++2a onwards. | |||
309 | if (MD->getParent()->isLambda() && | |||
310 | ((isa<CXXConstructorDecl>(MD) && | |||
311 | cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) || | |||
312 | MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())) { | |||
313 | Diag(Loc, diag::warn_cxx17_compat_lambda_def_ctor_assign) | |||
314 | << !isa<CXXConstructorDecl>(MD); | |||
315 | } | |||
316 | } | |||
317 | ||||
318 | auto getReferencedObjCProp = [](const NamedDecl *D) -> | |||
319 | const ObjCPropertyDecl * { | |||
320 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) | |||
321 | return MD->findPropertyDecl(); | |||
322 | return nullptr; | |||
323 | }; | |||
324 | if (const ObjCPropertyDecl *ObjCPDecl = getReferencedObjCProp(D)) { | |||
325 | if (diagnoseArgIndependentDiagnoseIfAttrs(ObjCPDecl, Loc)) | |||
326 | return true; | |||
327 | } else if (diagnoseArgIndependentDiagnoseIfAttrs(D, Loc)) { | |||
328 | return true; | |||
329 | } | |||
330 | ||||
331 | // [OpenMP 4.0], 2.15 declare reduction Directive, Restrictions | |||
332 | // Only the variables omp_in and omp_out are allowed in the combiner. | |||
333 | // Only the variables omp_priv and omp_orig are allowed in the | |||
334 | // initializer-clause. | |||
335 | auto *DRD = dyn_cast<OMPDeclareReductionDecl>(CurContext); | |||
336 | if (LangOpts.OpenMP && DRD && !CurContext->containsDecl(D) && | |||
337 | isa<VarDecl>(D)) { | |||
338 | Diag(Loc, diag::err_omp_wrong_var_in_declare_reduction) | |||
339 | << getCurFunction()->HasOMPDeclareReductionCombiner; | |||
340 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
341 | return true; | |||
342 | } | |||
343 | ||||
344 | // [OpenMP 5.0], 2.19.7.3. declare mapper Directive, Restrictions | |||
345 | // List-items in map clauses on this construct may only refer to the declared | |||
346 | // variable var and entities that could be referenced by a procedure defined | |||
347 | // at the same location | |||
348 | if (LangOpts.OpenMP && isa<VarDecl>(D) && | |||
349 | !isOpenMPDeclareMapperVarDeclAllowed(cast<VarDecl>(D))) { | |||
350 | Diag(Loc, diag::err_omp_declare_mapper_wrong_var) | |||
351 | << getOpenMPDeclareMapperVarName(); | |||
352 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
353 | return true; | |||
354 | } | |||
355 | ||||
356 | if (const auto *EmptyD = dyn_cast<UnresolvedUsingIfExistsDecl>(D)) { | |||
357 | Diag(Loc, diag::err_use_of_empty_using_if_exists); | |||
358 | Diag(EmptyD->getLocation(), diag::note_empty_using_if_exists_here); | |||
359 | return true; | |||
360 | } | |||
361 | ||||
362 | DiagnoseAvailabilityOfDecl(D, Locs, UnknownObjCClass, ObjCPropertyAccess, | |||
363 | AvoidPartialAvailabilityChecks, ClassReceiver); | |||
364 | ||||
365 | DiagnoseUnusedOfDecl(*this, D, Loc); | |||
366 | ||||
367 | diagnoseUseOfInternalDeclInInlineFunction(*this, D, Loc); | |||
368 | ||||
369 | if (LangOpts.SYCLIsDevice || (LangOpts.OpenMP && LangOpts.OpenMPIsDevice)) { | |||
370 | if (auto *VD = dyn_cast<ValueDecl>(D)) | |||
371 | checkDeviceDecl(VD, Loc); | |||
372 | ||||
373 | if (!Context.getTargetInfo().isTLSSupported()) | |||
374 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
375 | if (VD->getTLSKind() != VarDecl::TLS_None) | |||
376 | targetDiag(*Locs.begin(), diag::err_thread_unsupported); | |||
377 | } | |||
378 | ||||
379 | if (isa<ParmVarDecl>(D) && isa<RequiresExprBodyDecl>(D->getDeclContext()) && | |||
380 | !isUnevaluatedContext()) { | |||
381 | // C++ [expr.prim.req.nested] p3 | |||
382 | // A local parameter shall only appear as an unevaluated operand | |||
383 | // (Clause 8) within the constraint-expression. | |||
384 | Diag(Loc, diag::err_requires_expr_parameter_referenced_in_evaluated_context) | |||
385 | << D; | |||
386 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
387 | return true; | |||
388 | } | |||
389 | ||||
390 | return false; | |||
391 | } | |||
392 | ||||
393 | /// DiagnoseSentinelCalls - This routine checks whether a call or | |||
394 | /// message-send is to a declaration with the sentinel attribute, and | |||
395 | /// if so, it checks that the requirements of the sentinel are | |||
396 | /// satisfied. | |||
397 | void Sema::DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, | |||
398 | ArrayRef<Expr *> Args) { | |||
399 | const SentinelAttr *attr = D->getAttr<SentinelAttr>(); | |||
400 | if (!attr) | |||
401 | return; | |||
402 | ||||
403 | // The number of formal parameters of the declaration. | |||
404 | unsigned numFormalParams; | |||
405 | ||||
406 | // The kind of declaration. This is also an index into a %select in | |||
407 | // the diagnostic. | |||
408 | enum CalleeType { CT_Function, CT_Method, CT_Block } calleeType; | |||
409 | ||||
410 | if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { | |||
411 | numFormalParams = MD->param_size(); | |||
412 | calleeType = CT_Method; | |||
413 | } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
414 | numFormalParams = FD->param_size(); | |||
415 | calleeType = CT_Function; | |||
416 | } else if (isa<VarDecl>(D)) { | |||
417 | QualType type = cast<ValueDecl>(D)->getType(); | |||
418 | const FunctionType *fn = nullptr; | |||
419 | if (const PointerType *ptr = type->getAs<PointerType>()) { | |||
420 | fn = ptr->getPointeeType()->getAs<FunctionType>(); | |||
421 | if (!fn) return; | |||
422 | calleeType = CT_Function; | |||
423 | } else if (const BlockPointerType *ptr = type->getAs<BlockPointerType>()) { | |||
424 | fn = ptr->getPointeeType()->castAs<FunctionType>(); | |||
425 | calleeType = CT_Block; | |||
426 | } else { | |||
427 | return; | |||
428 | } | |||
429 | ||||
430 | if (const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(fn)) { | |||
431 | numFormalParams = proto->getNumParams(); | |||
432 | } else { | |||
433 | numFormalParams = 0; | |||
434 | } | |||
435 | } else { | |||
436 | return; | |||
437 | } | |||
438 | ||||
439 | // "nullPos" is the number of formal parameters at the end which | |||
440 | // effectively count as part of the variadic arguments. This is | |||
441 | // useful if you would prefer to not have *any* formal parameters, | |||
442 | // but the language forces you to have at least one. | |||
443 | unsigned nullPos = attr->getNullPos(); | |||
444 | assert((nullPos == 0 || nullPos == 1) && "invalid null position on sentinel")(static_cast <bool> ((nullPos == 0 || nullPos == 1) && "invalid null position on sentinel") ? void (0) : __assert_fail ("(nullPos == 0 || nullPos == 1) && \"invalid null position on sentinel\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 444, __extension__ __PRETTY_FUNCTION__)); | |||
445 | numFormalParams = (nullPos > numFormalParams ? 0 : numFormalParams - nullPos); | |||
446 | ||||
447 | // The number of arguments which should follow the sentinel. | |||
448 | unsigned numArgsAfterSentinel = attr->getSentinel(); | |||
449 | ||||
450 | // If there aren't enough arguments for all the formal parameters, | |||
451 | // the sentinel, and the args after the sentinel, complain. | |||
452 | if (Args.size() < numFormalParams + numArgsAfterSentinel + 1) { | |||
453 | Diag(Loc, diag::warn_not_enough_argument) << D->getDeclName(); | |||
454 | Diag(D->getLocation(), diag::note_sentinel_here) << int(calleeType); | |||
455 | return; | |||
456 | } | |||
457 | ||||
458 | // Otherwise, find the sentinel expression. | |||
459 | Expr *sentinelExpr = Args[Args.size() - numArgsAfterSentinel - 1]; | |||
460 | if (!sentinelExpr) return; | |||
461 | if (sentinelExpr->isValueDependent()) return; | |||
462 | if (Context.isSentinelNullExpr(sentinelExpr)) return; | |||
463 | ||||
464 | // Pick a reasonable string to insert. Optimistically use 'nil', 'nullptr', | |||
465 | // or 'NULL' if those are actually defined in the context. Only use | |||
466 | // 'nil' for ObjC methods, where it's much more likely that the | |||
467 | // variadic arguments form a list of object pointers. | |||
468 | SourceLocation MissingNilLoc = getLocForEndOfToken(sentinelExpr->getEndLoc()); | |||
469 | std::string NullValue; | |||
470 | if (calleeType == CT_Method && PP.isMacroDefined("nil")) | |||
471 | NullValue = "nil"; | |||
472 | else if (getLangOpts().CPlusPlus11) | |||
473 | NullValue = "nullptr"; | |||
474 | else if (PP.isMacroDefined("NULL")) | |||
475 | NullValue = "NULL"; | |||
476 | else | |||
477 | NullValue = "(void*) 0"; | |||
478 | ||||
479 | if (MissingNilLoc.isInvalid()) | |||
480 | Diag(Loc, diag::warn_missing_sentinel) << int(calleeType); | |||
481 | else | |||
482 | Diag(MissingNilLoc, diag::warn_missing_sentinel) | |||
483 | << int(calleeType) | |||
484 | << FixItHint::CreateInsertion(MissingNilLoc, ", " + NullValue); | |||
485 | Diag(D->getLocation(), diag::note_sentinel_here) << int(calleeType); | |||
486 | } | |||
487 | ||||
488 | SourceRange Sema::getExprRange(Expr *E) const { | |||
489 | return E ? E->getSourceRange() : SourceRange(); | |||
490 | } | |||
491 | ||||
492 | //===----------------------------------------------------------------------===// | |||
493 | // Standard Promotions and Conversions | |||
494 | //===----------------------------------------------------------------------===// | |||
495 | ||||
496 | /// DefaultFunctionArrayConversion (C99 6.3.2.1p3, C99 6.3.2.1p4). | |||
497 | ExprResult Sema::DefaultFunctionArrayConversion(Expr *E, bool Diagnose) { | |||
498 | // Handle any placeholder expressions which made it here. | |||
499 | if (E->getType()->isPlaceholderType()) { | |||
500 | ExprResult result = CheckPlaceholderExpr(E); | |||
501 | if (result.isInvalid()) return ExprError(); | |||
502 | E = result.get(); | |||
503 | } | |||
504 | ||||
505 | QualType Ty = E->getType(); | |||
506 | assert(!Ty.isNull() && "DefaultFunctionArrayConversion - missing type")(static_cast <bool> (!Ty.isNull() && "DefaultFunctionArrayConversion - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"DefaultFunctionArrayConversion - missing type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 506, __extension__ __PRETTY_FUNCTION__)); | |||
507 | ||||
508 | if (Ty->isFunctionType()) { | |||
509 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts())) | |||
510 | if (auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl())) | |||
511 | if (!checkAddressOfFunctionIsAvailable(FD, Diagnose, E->getExprLoc())) | |||
512 | return ExprError(); | |||
513 | ||||
514 | E = ImpCastExprToType(E, Context.getPointerType(Ty), | |||
515 | CK_FunctionToPointerDecay).get(); | |||
516 | } else if (Ty->isArrayType()) { | |||
517 | // In C90 mode, arrays only promote to pointers if the array expression is | |||
518 | // an lvalue. The relevant legalese is C90 6.2.2.1p3: "an lvalue that has | |||
519 | // type 'array of type' is converted to an expression that has type 'pointer | |||
520 | // to type'...". In C99 this was changed to: C99 6.3.2.1p3: "an expression | |||
521 | // that has type 'array of type' ...". The relevant change is "an lvalue" | |||
522 | // (C90) to "an expression" (C99). | |||
523 | // | |||
524 | // C++ 4.2p1: | |||
525 | // An lvalue or rvalue of type "array of N T" or "array of unknown bound of | |||
526 | // T" can be converted to an rvalue of type "pointer to T". | |||
527 | // | |||
528 | if (getLangOpts().C99 || getLangOpts().CPlusPlus || E->isLValue()) { | |||
529 | ExprResult Res = ImpCastExprToType(E, Context.getArrayDecayedType(Ty), | |||
530 | CK_ArrayToPointerDecay); | |||
531 | if (Res.isInvalid()) | |||
532 | return ExprError(); | |||
533 | E = Res.get(); | |||
534 | } | |||
535 | } | |||
536 | return E; | |||
537 | } | |||
538 | ||||
539 | static void CheckForNullPointerDereference(Sema &S, Expr *E) { | |||
540 | // Check to see if we are dereferencing a null pointer. If so, | |||
541 | // and if not volatile-qualified, this is undefined behavior that the | |||
542 | // optimizer will delete, so warn about it. People sometimes try to use this | |||
543 | // to get a deterministic trap and are surprised by clang's behavior. This | |||
544 | // only handles the pattern "*null", which is a very syntactic check. | |||
545 | const auto *UO = dyn_cast<UnaryOperator>(E->IgnoreParenCasts()); | |||
546 | if (UO && UO->getOpcode() == UO_Deref && | |||
547 | UO->getSubExpr()->getType()->isPointerType()) { | |||
548 | const LangAS AS = | |||
549 | UO->getSubExpr()->getType()->getPointeeType().getAddressSpace(); | |||
550 | if ((!isTargetAddressSpace(AS) || | |||
551 | (isTargetAddressSpace(AS) && toTargetAddressSpace(AS) == 0)) && | |||
552 | UO->getSubExpr()->IgnoreParenCasts()->isNullPointerConstant( | |||
553 | S.Context, Expr::NPC_ValueDependentIsNotNull) && | |||
554 | !UO->getType().isVolatileQualified()) { | |||
555 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | |||
556 | S.PDiag(diag::warn_indirection_through_null) | |||
557 | << UO->getSubExpr()->getSourceRange()); | |||
558 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | |||
559 | S.PDiag(diag::note_indirection_through_null)); | |||
560 | } | |||
561 | } | |||
562 | } | |||
563 | ||||
564 | static void DiagnoseDirectIsaAccess(Sema &S, const ObjCIvarRefExpr *OIRE, | |||
565 | SourceLocation AssignLoc, | |||
566 | const Expr* RHS) { | |||
567 | const ObjCIvarDecl *IV = OIRE->getDecl(); | |||
568 | if (!IV) | |||
569 | return; | |||
570 | ||||
571 | DeclarationName MemberName = IV->getDeclName(); | |||
572 | IdentifierInfo *Member = MemberName.getAsIdentifierInfo(); | |||
573 | if (!Member || !Member->isStr("isa")) | |||
574 | return; | |||
575 | ||||
576 | const Expr *Base = OIRE->getBase(); | |||
577 | QualType BaseType = Base->getType(); | |||
578 | if (OIRE->isArrow()) | |||
579 | BaseType = BaseType->getPointeeType(); | |||
580 | if (const ObjCObjectType *OTy = BaseType->getAs<ObjCObjectType>()) | |||
581 | if (ObjCInterfaceDecl *IDecl = OTy->getInterface()) { | |||
582 | ObjCInterfaceDecl *ClassDeclared = nullptr; | |||
583 | ObjCIvarDecl *IV = IDecl->lookupInstanceVariable(Member, ClassDeclared); | |||
584 | if (!ClassDeclared->getSuperClass() | |||
585 | && (*ClassDeclared->ivar_begin()) == IV) { | |||
586 | if (RHS) { | |||
587 | NamedDecl *ObjectSetClass = | |||
588 | S.LookupSingleName(S.TUScope, | |||
589 | &S.Context.Idents.get("object_setClass"), | |||
590 | SourceLocation(), S.LookupOrdinaryName); | |||
591 | if (ObjectSetClass) { | |||
592 | SourceLocation RHSLocEnd = S.getLocForEndOfToken(RHS->getEndLoc()); | |||
593 | S.Diag(OIRE->getExprLoc(), diag::warn_objc_isa_assign) | |||
594 | << FixItHint::CreateInsertion(OIRE->getBeginLoc(), | |||
595 | "object_setClass(") | |||
596 | << FixItHint::CreateReplacement( | |||
597 | SourceRange(OIRE->getOpLoc(), AssignLoc), ",") | |||
598 | << FixItHint::CreateInsertion(RHSLocEnd, ")"); | |||
599 | } | |||
600 | else | |||
601 | S.Diag(OIRE->getLocation(), diag::warn_objc_isa_assign); | |||
602 | } else { | |||
603 | NamedDecl *ObjectGetClass = | |||
604 | S.LookupSingleName(S.TUScope, | |||
605 | &S.Context.Idents.get("object_getClass"), | |||
606 | SourceLocation(), S.LookupOrdinaryName); | |||
607 | if (ObjectGetClass) | |||
608 | S.Diag(OIRE->getExprLoc(), diag::warn_objc_isa_use) | |||
609 | << FixItHint::CreateInsertion(OIRE->getBeginLoc(), | |||
610 | "object_getClass(") | |||
611 | << FixItHint::CreateReplacement( | |||
612 | SourceRange(OIRE->getOpLoc(), OIRE->getEndLoc()), ")"); | |||
613 | else | |||
614 | S.Diag(OIRE->getLocation(), diag::warn_objc_isa_use); | |||
615 | } | |||
616 | S.Diag(IV->getLocation(), diag::note_ivar_decl); | |||
617 | } | |||
618 | } | |||
619 | } | |||
620 | ||||
621 | ExprResult Sema::DefaultLvalueConversion(Expr *E) { | |||
622 | // Handle any placeholder expressions which made it here. | |||
623 | if (E->getType()->isPlaceholderType()) { | |||
624 | ExprResult result = CheckPlaceholderExpr(E); | |||
625 | if (result.isInvalid()) return ExprError(); | |||
626 | E = result.get(); | |||
627 | } | |||
628 | ||||
629 | // C++ [conv.lval]p1: | |||
630 | // A glvalue of a non-function, non-array type T can be | |||
631 | // converted to a prvalue. | |||
632 | if (!E->isGLValue()) return E; | |||
633 | ||||
634 | QualType T = E->getType(); | |||
635 | assert(!T.isNull() && "r-value conversion on typeless expression?")(static_cast <bool> (!T.isNull() && "r-value conversion on typeless expression?" ) ? void (0) : __assert_fail ("!T.isNull() && \"r-value conversion on typeless expression?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 635, __extension__ __PRETTY_FUNCTION__)); | |||
636 | ||||
637 | // lvalue-to-rvalue conversion cannot be applied to function or array types. | |||
638 | if (T->isFunctionType() || T->isArrayType()) | |||
639 | return E; | |||
640 | ||||
641 | // We don't want to throw lvalue-to-rvalue casts on top of | |||
642 | // expressions of certain types in C++. | |||
643 | if (getLangOpts().CPlusPlus && | |||
644 | (E->getType() == Context.OverloadTy || | |||
645 | T->isDependentType() || | |||
646 | T->isRecordType())) | |||
647 | return E; | |||
648 | ||||
649 | // The C standard is actually really unclear on this point, and | |||
650 | // DR106 tells us what the result should be but not why. It's | |||
651 | // generally best to say that void types just doesn't undergo | |||
652 | // lvalue-to-rvalue at all. Note that expressions of unqualified | |||
653 | // 'void' type are never l-values, but qualified void can be. | |||
654 | if (T->isVoidType()) | |||
655 | return E; | |||
656 | ||||
657 | // OpenCL usually rejects direct accesses to values of 'half' type. | |||
658 | if (getLangOpts().OpenCL && | |||
659 | !getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts()) && | |||
660 | T->isHalfType()) { | |||
661 | Diag(E->getExprLoc(), diag::err_opencl_half_load_store) | |||
662 | << 0 << T; | |||
663 | return ExprError(); | |||
664 | } | |||
665 | ||||
666 | CheckForNullPointerDereference(*this, E); | |||
667 | if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(E->IgnoreParenCasts())) { | |||
668 | NamedDecl *ObjectGetClass = LookupSingleName(TUScope, | |||
669 | &Context.Idents.get("object_getClass"), | |||
670 | SourceLocation(), LookupOrdinaryName); | |||
671 | if (ObjectGetClass) | |||
672 | Diag(E->getExprLoc(), diag::warn_objc_isa_use) | |||
673 | << FixItHint::CreateInsertion(OISA->getBeginLoc(), "object_getClass(") | |||
674 | << FixItHint::CreateReplacement( | |||
675 | SourceRange(OISA->getOpLoc(), OISA->getIsaMemberLoc()), ")"); | |||
676 | else | |||
677 | Diag(E->getExprLoc(), diag::warn_objc_isa_use); | |||
678 | } | |||
679 | else if (const ObjCIvarRefExpr *OIRE = | |||
680 | dyn_cast<ObjCIvarRefExpr>(E->IgnoreParenCasts())) | |||
681 | DiagnoseDirectIsaAccess(*this, OIRE, SourceLocation(), /* Expr*/nullptr); | |||
682 | ||||
683 | // C++ [conv.lval]p1: | |||
684 | // [...] If T is a non-class type, the type of the prvalue is the | |||
685 | // cv-unqualified version of T. Otherwise, the type of the | |||
686 | // rvalue is T. | |||
687 | // | |||
688 | // C99 6.3.2.1p2: | |||
689 | // If the lvalue has qualified type, the value has the unqualified | |||
690 | // version of the type of the lvalue; otherwise, the value has the | |||
691 | // type of the lvalue. | |||
692 | if (T.hasQualifiers()) | |||
693 | T = T.getUnqualifiedType(); | |||
694 | ||||
695 | // Under the MS ABI, lock down the inheritance model now. | |||
696 | if (T->isMemberPointerType() && | |||
697 | Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
698 | (void)isCompleteType(E->getExprLoc(), T); | |||
699 | ||||
700 | ExprResult Res = CheckLValueToRValueConversionOperand(E); | |||
701 | if (Res.isInvalid()) | |||
702 | return Res; | |||
703 | E = Res.get(); | |||
704 | ||||
705 | // Loading a __weak object implicitly retains the value, so we need a cleanup to | |||
706 | // balance that. | |||
707 | if (E->getType().getObjCLifetime() == Qualifiers::OCL_Weak) | |||
708 | Cleanup.setExprNeedsCleanups(true); | |||
709 | ||||
710 | if (E->getType().isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
711 | Cleanup.setExprNeedsCleanups(true); | |||
712 | ||||
713 | // C++ [conv.lval]p3: | |||
714 | // If T is cv std::nullptr_t, the result is a null pointer constant. | |||
715 | CastKind CK = T->isNullPtrType() ? CK_NullToPointer : CK_LValueToRValue; | |||
716 | Res = ImplicitCastExpr::Create(Context, T, CK, E, nullptr, VK_PRValue, | |||
717 | CurFPFeatureOverrides()); | |||
718 | ||||
719 | // C11 6.3.2.1p2: | |||
720 | // ... if the lvalue has atomic type, the value has the non-atomic version | |||
721 | // of the type of the lvalue ... | |||
722 | if (const AtomicType *Atomic = T->getAs<AtomicType>()) { | |||
723 | T = Atomic->getValueType().getUnqualifiedType(); | |||
724 | Res = ImplicitCastExpr::Create(Context, T, CK_AtomicToNonAtomic, Res.get(), | |||
725 | nullptr, VK_PRValue, FPOptionsOverride()); | |||
726 | } | |||
727 | ||||
728 | return Res; | |||
729 | } | |||
730 | ||||
731 | ExprResult Sema::DefaultFunctionArrayLvalueConversion(Expr *E, bool Diagnose) { | |||
732 | ExprResult Res = DefaultFunctionArrayConversion(E, Diagnose); | |||
733 | if (Res.isInvalid()) | |||
734 | return ExprError(); | |||
735 | Res = DefaultLvalueConversion(Res.get()); | |||
736 | if (Res.isInvalid()) | |||
737 | return ExprError(); | |||
738 | return Res; | |||
739 | } | |||
740 | ||||
741 | /// CallExprUnaryConversions - a special case of an unary conversion | |||
742 | /// performed on a function designator of a call expression. | |||
743 | ExprResult Sema::CallExprUnaryConversions(Expr *E) { | |||
744 | QualType Ty = E->getType(); | |||
745 | ExprResult Res = E; | |||
746 | // Only do implicit cast for a function type, but not for a pointer | |||
747 | // to function type. | |||
748 | if (Ty->isFunctionType()) { | |||
749 | Res = ImpCastExprToType(E, Context.getPointerType(Ty), | |||
750 | CK_FunctionToPointerDecay); | |||
751 | if (Res.isInvalid()) | |||
752 | return ExprError(); | |||
753 | } | |||
754 | Res = DefaultLvalueConversion(Res.get()); | |||
755 | if (Res.isInvalid()) | |||
756 | return ExprError(); | |||
757 | return Res.get(); | |||
758 | } | |||
759 | ||||
760 | /// UsualUnaryConversions - Performs various conversions that are common to most | |||
761 | /// operators (C99 6.3). The conversions of array and function types are | |||
762 | /// sometimes suppressed. For example, the array->pointer conversion doesn't | |||
763 | /// apply if the array is an argument to the sizeof or address (&) operators. | |||
764 | /// In these instances, this routine should *not* be called. | |||
765 | ExprResult Sema::UsualUnaryConversions(Expr *E) { | |||
766 | // First, convert to an r-value. | |||
767 | ExprResult Res = DefaultFunctionArrayLvalueConversion(E); | |||
768 | if (Res.isInvalid()) | |||
769 | return ExprError(); | |||
770 | E = Res.get(); | |||
771 | ||||
772 | QualType Ty = E->getType(); | |||
773 | assert(!Ty.isNull() && "UsualUnaryConversions - missing type")(static_cast <bool> (!Ty.isNull() && "UsualUnaryConversions - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"UsualUnaryConversions - missing type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 773, __extension__ __PRETTY_FUNCTION__)); | |||
774 | ||||
775 | LangOptions::FPEvalMethodKind EvalMethod = CurFPFeatures.getFPEvalMethod(); | |||
776 | if (EvalMethod != LangOptions::FEM_Source && Ty->isFloatingType()) { | |||
777 | switch (EvalMethod) { | |||
778 | default: | |||
779 | llvm_unreachable("Unrecognized float evaluation method")::llvm::llvm_unreachable_internal("Unrecognized float evaluation method" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 779); | |||
780 | break; | |||
781 | case LangOptions::FEM_TargetDefault: | |||
782 | // Float evaluation method not defined, use FEM_Source. | |||
783 | break; | |||
784 | case LangOptions::FEM_Double: | |||
785 | if (Context.getFloatingTypeOrder(Context.DoubleTy, Ty) > 0) | |||
786 | // Widen the expression to double. | |||
787 | return Ty->isComplexType() | |||
788 | ? ImpCastExprToType(E, | |||
789 | Context.getComplexType(Context.DoubleTy), | |||
790 | CK_FloatingComplexCast) | |||
791 | : ImpCastExprToType(E, Context.DoubleTy, CK_FloatingCast); | |||
792 | break; | |||
793 | case LangOptions::FEM_Extended: | |||
794 | if (Context.getFloatingTypeOrder(Context.LongDoubleTy, Ty) > 0) | |||
795 | // Widen the expression to long double. | |||
796 | return Ty->isComplexType() | |||
797 | ? ImpCastExprToType( | |||
798 | E, Context.getComplexType(Context.LongDoubleTy), | |||
799 | CK_FloatingComplexCast) | |||
800 | : ImpCastExprToType(E, Context.LongDoubleTy, | |||
801 | CK_FloatingCast); | |||
802 | break; | |||
803 | } | |||
804 | } | |||
805 | ||||
806 | // Half FP have to be promoted to float unless it is natively supported | |||
807 | if (Ty->isHalfType() && !getLangOpts().NativeHalfType) | |||
808 | return ImpCastExprToType(Res.get(), Context.FloatTy, CK_FloatingCast); | |||
809 | ||||
810 | // Try to perform integral promotions if the object has a theoretically | |||
811 | // promotable type. | |||
812 | if (Ty->isIntegralOrUnscopedEnumerationType()) { | |||
813 | // C99 6.3.1.1p2: | |||
814 | // | |||
815 | // The following may be used in an expression wherever an int or | |||
816 | // unsigned int may be used: | |||
817 | // - an object or expression with an integer type whose integer | |||
818 | // conversion rank is less than or equal to the rank of int | |||
819 | // and unsigned int. | |||
820 | // - A bit-field of type _Bool, int, signed int, or unsigned int. | |||
821 | // | |||
822 | // If an int can represent all values of the original type, the | |||
823 | // value is converted to an int; otherwise, it is converted to an | |||
824 | // unsigned int. These are called the integer promotions. All | |||
825 | // other types are unchanged by the integer promotions. | |||
826 | ||||
827 | QualType PTy = Context.isPromotableBitField(E); | |||
828 | if (!PTy.isNull()) { | |||
829 | E = ImpCastExprToType(E, PTy, CK_IntegralCast).get(); | |||
830 | return E; | |||
831 | } | |||
832 | if (Ty->isPromotableIntegerType()) { | |||
833 | QualType PT = Context.getPromotedIntegerType(Ty); | |||
834 | E = ImpCastExprToType(E, PT, CK_IntegralCast).get(); | |||
835 | return E; | |||
836 | } | |||
837 | } | |||
838 | return E; | |||
839 | } | |||
840 | ||||
841 | /// DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that | |||
842 | /// do not have a prototype. Arguments that have type float or __fp16 | |||
843 | /// are promoted to double. All other argument types are converted by | |||
844 | /// UsualUnaryConversions(). | |||
845 | ExprResult Sema::DefaultArgumentPromotion(Expr *E) { | |||
846 | QualType Ty = E->getType(); | |||
847 | assert(!Ty.isNull() && "DefaultArgumentPromotion - missing type")(static_cast <bool> (!Ty.isNull() && "DefaultArgumentPromotion - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"DefaultArgumentPromotion - missing type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 847, __extension__ __PRETTY_FUNCTION__)); | |||
848 | ||||
849 | ExprResult Res = UsualUnaryConversions(E); | |||
850 | if (Res.isInvalid()) | |||
851 | return ExprError(); | |||
852 | E = Res.get(); | |||
853 | ||||
854 | // If this is a 'float' or '__fp16' (CVR qualified or typedef) | |||
855 | // promote to double. | |||
856 | // Note that default argument promotion applies only to float (and | |||
857 | // half/fp16); it does not apply to _Float16. | |||
858 | const BuiltinType *BTy = Ty->getAs<BuiltinType>(); | |||
859 | if (BTy && (BTy->getKind() == BuiltinType::Half || | |||
860 | BTy->getKind() == BuiltinType::Float)) { | |||
861 | if (getLangOpts().OpenCL && | |||
862 | !getOpenCLOptions().isAvailableOption("cl_khr_fp64", getLangOpts())) { | |||
863 | if (BTy->getKind() == BuiltinType::Half) { | |||
864 | E = ImpCastExprToType(E, Context.FloatTy, CK_FloatingCast).get(); | |||
865 | } | |||
866 | } else { | |||
867 | E = ImpCastExprToType(E, Context.DoubleTy, CK_FloatingCast).get(); | |||
868 | } | |||
869 | } | |||
870 | if (BTy && | |||
871 | getLangOpts().getExtendIntArgs() == | |||
872 | LangOptions::ExtendArgsKind::ExtendTo64 && | |||
873 | Context.getTargetInfo().supportsExtendIntArgs() && Ty->isIntegerType() && | |||
874 | Context.getTypeSizeInChars(BTy) < | |||
875 | Context.getTypeSizeInChars(Context.LongLongTy)) { | |||
876 | E = (Ty->isUnsignedIntegerType()) | |||
877 | ? ImpCastExprToType(E, Context.UnsignedLongLongTy, CK_IntegralCast) | |||
878 | .get() | |||
879 | : ImpCastExprToType(E, Context.LongLongTy, CK_IntegralCast).get(); | |||
880 | assert(8 == Context.getTypeSizeInChars(Context.LongLongTy).getQuantity() &&(static_cast <bool> (8 == Context.getTypeSizeInChars(Context .LongLongTy).getQuantity() && "Unexpected typesize for LongLongTy" ) ? void (0) : __assert_fail ("8 == Context.getTypeSizeInChars(Context.LongLongTy).getQuantity() && \"Unexpected typesize for LongLongTy\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 881, __extension__ __PRETTY_FUNCTION__)) | |||
881 | "Unexpected typesize for LongLongTy")(static_cast <bool> (8 == Context.getTypeSizeInChars(Context .LongLongTy).getQuantity() && "Unexpected typesize for LongLongTy" ) ? void (0) : __assert_fail ("8 == Context.getTypeSizeInChars(Context.LongLongTy).getQuantity() && \"Unexpected typesize for LongLongTy\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 881, __extension__ __PRETTY_FUNCTION__)); | |||
882 | } | |||
883 | ||||
884 | // C++ performs lvalue-to-rvalue conversion as a default argument | |||
885 | // promotion, even on class types, but note: | |||
886 | // C++11 [conv.lval]p2: | |||
887 | // When an lvalue-to-rvalue conversion occurs in an unevaluated | |||
888 | // operand or a subexpression thereof the value contained in the | |||
889 | // referenced object is not accessed. Otherwise, if the glvalue | |||
890 | // has a class type, the conversion copy-initializes a temporary | |||
891 | // of type T from the glvalue and the result of the conversion | |||
892 | // is a prvalue for the temporary. | |||
893 | // FIXME: add some way to gate this entire thing for correctness in | |||
894 | // potentially potentially evaluated contexts. | |||
895 | if (getLangOpts().CPlusPlus && E->isGLValue() && !isUnevaluatedContext()) { | |||
896 | ExprResult Temp = PerformCopyInitialization( | |||
897 | InitializedEntity::InitializeTemporary(E->getType()), | |||
898 | E->getExprLoc(), E); | |||
899 | if (Temp.isInvalid()) | |||
900 | return ExprError(); | |||
901 | E = Temp.get(); | |||
902 | } | |||
903 | ||||
904 | return E; | |||
905 | } | |||
906 | ||||
907 | /// Determine the degree of POD-ness for an expression. | |||
908 | /// Incomplete types are considered POD, since this check can be performed | |||
909 | /// when we're in an unevaluated context. | |||
910 | Sema::VarArgKind Sema::isValidVarArgType(const QualType &Ty) { | |||
911 | if (Ty->isIncompleteType()) { | |||
912 | // C++11 [expr.call]p7: | |||
913 | // After these conversions, if the argument does not have arithmetic, | |||
914 | // enumeration, pointer, pointer to member, or class type, the program | |||
915 | // is ill-formed. | |||
916 | // | |||
917 | // Since we've already performed array-to-pointer and function-to-pointer | |||
918 | // decay, the only such type in C++ is cv void. This also handles | |||
919 | // initializer lists as variadic arguments. | |||
920 | if (Ty->isVoidType()) | |||
921 | return VAK_Invalid; | |||
922 | ||||
923 | if (Ty->isObjCObjectType()) | |||
924 | return VAK_Invalid; | |||
925 | return VAK_Valid; | |||
926 | } | |||
927 | ||||
928 | if (Ty.isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
929 | return VAK_Invalid; | |||
930 | ||||
931 | if (Ty.isCXX98PODType(Context)) | |||
932 | return VAK_Valid; | |||
933 | ||||
934 | // C++11 [expr.call]p7: | |||
935 | // Passing a potentially-evaluated argument of class type (Clause 9) | |||
936 | // having a non-trivial copy constructor, a non-trivial move constructor, | |||
937 | // or a non-trivial destructor, with no corresponding parameter, | |||
938 | // is conditionally-supported with implementation-defined semantics. | |||
939 | if (getLangOpts().CPlusPlus11 && !Ty->isDependentType()) | |||
940 | if (CXXRecordDecl *Record = Ty->getAsCXXRecordDecl()) | |||
941 | if (!Record->hasNonTrivialCopyConstructor() && | |||
942 | !Record->hasNonTrivialMoveConstructor() && | |||
943 | !Record->hasNonTrivialDestructor()) | |||
944 | return VAK_ValidInCXX11; | |||
945 | ||||
946 | if (getLangOpts().ObjCAutoRefCount && Ty->isObjCLifetimeType()) | |||
947 | return VAK_Valid; | |||
948 | ||||
949 | if (Ty->isObjCObjectType()) | |||
950 | return VAK_Invalid; | |||
951 | ||||
952 | if (getLangOpts().MSVCCompat) | |||
953 | return VAK_MSVCUndefined; | |||
954 | ||||
955 | // FIXME: In C++11, these cases are conditionally-supported, meaning we're | |||
956 | // permitted to reject them. We should consider doing so. | |||
957 | return VAK_Undefined; | |||
958 | } | |||
959 | ||||
960 | void Sema::checkVariadicArgument(const Expr *E, VariadicCallType CT) { | |||
961 | // Don't allow one to pass an Objective-C interface to a vararg. | |||
962 | const QualType &Ty = E->getType(); | |||
963 | VarArgKind VAK = isValidVarArgType(Ty); | |||
964 | ||||
965 | // Complain about passing non-POD types through varargs. | |||
966 | switch (VAK) { | |||
967 | case VAK_ValidInCXX11: | |||
968 | DiagRuntimeBehavior( | |||
969 | E->getBeginLoc(), nullptr, | |||
970 | PDiag(diag::warn_cxx98_compat_pass_non_pod_arg_to_vararg) << Ty << CT); | |||
971 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
972 | case VAK_Valid: | |||
973 | if (Ty->isRecordType()) { | |||
974 | // This is unlikely to be what the user intended. If the class has a | |||
975 | // 'c_str' member function, the user probably meant to call that. | |||
976 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
977 | PDiag(diag::warn_pass_class_arg_to_vararg) | |||
978 | << Ty << CT << hasCStrMethod(E) << ".c_str()"); | |||
979 | } | |||
980 | break; | |||
981 | ||||
982 | case VAK_Undefined: | |||
983 | case VAK_MSVCUndefined: | |||
984 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
985 | PDiag(diag::warn_cannot_pass_non_pod_arg_to_vararg) | |||
986 | << getLangOpts().CPlusPlus11 << Ty << CT); | |||
987 | break; | |||
988 | ||||
989 | case VAK_Invalid: | |||
990 | if (Ty.isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
991 | Diag(E->getBeginLoc(), | |||
992 | diag::err_cannot_pass_non_trivial_c_struct_to_vararg) | |||
993 | << Ty << CT; | |||
994 | else if (Ty->isObjCObjectType()) | |||
995 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
996 | PDiag(diag::err_cannot_pass_objc_interface_to_vararg) | |||
997 | << Ty << CT); | |||
998 | else | |||
999 | Diag(E->getBeginLoc(), diag::err_cannot_pass_to_vararg) | |||
1000 | << isa<InitListExpr>(E) << Ty << CT; | |||
1001 | break; | |||
1002 | } | |||
1003 | } | |||
1004 | ||||
1005 | /// DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but | |||
1006 | /// will create a trap if the resulting type is not a POD type. | |||
1007 | ExprResult Sema::DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, | |||
1008 | FunctionDecl *FDecl) { | |||
1009 | if (const BuiltinType *PlaceholderTy = E->getType()->getAsPlaceholderType()) { | |||
1010 | // Strip the unbridged-cast placeholder expression off, if applicable. | |||
1011 | if (PlaceholderTy->getKind() == BuiltinType::ARCUnbridgedCast && | |||
1012 | (CT == VariadicMethod || | |||
1013 | (FDecl && FDecl->hasAttr<CFAuditedTransferAttr>()))) { | |||
1014 | E = stripARCUnbridgedCast(E); | |||
1015 | ||||
1016 | // Otherwise, do normal placeholder checking. | |||
1017 | } else { | |||
1018 | ExprResult ExprRes = CheckPlaceholderExpr(E); | |||
1019 | if (ExprRes.isInvalid()) | |||
1020 | return ExprError(); | |||
1021 | E = ExprRes.get(); | |||
1022 | } | |||
1023 | } | |||
1024 | ||||
1025 | ExprResult ExprRes = DefaultArgumentPromotion(E); | |||
1026 | if (ExprRes.isInvalid()) | |||
1027 | return ExprError(); | |||
1028 | ||||
1029 | // Copy blocks to the heap. | |||
1030 | if (ExprRes.get()->getType()->isBlockPointerType()) | |||
1031 | maybeExtendBlockObject(ExprRes); | |||
1032 | ||||
1033 | E = ExprRes.get(); | |||
1034 | ||||
1035 | // Diagnostics regarding non-POD argument types are | |||
1036 | // emitted along with format string checking in Sema::CheckFunctionCall(). | |||
1037 | if (isValidVarArgType(E->getType()) == VAK_Undefined) { | |||
1038 | // Turn this into a trap. | |||
1039 | CXXScopeSpec SS; | |||
1040 | SourceLocation TemplateKWLoc; | |||
1041 | UnqualifiedId Name; | |||
1042 | Name.setIdentifier(PP.getIdentifierInfo("__builtin_trap"), | |||
1043 | E->getBeginLoc()); | |||
1044 | ExprResult TrapFn = ActOnIdExpression(TUScope, SS, TemplateKWLoc, Name, | |||
1045 | /*HasTrailingLParen=*/true, | |||
1046 | /*IsAddressOfOperand=*/false); | |||
1047 | if (TrapFn.isInvalid()) | |||
1048 | return ExprError(); | |||
1049 | ||||
1050 | ExprResult Call = BuildCallExpr(TUScope, TrapFn.get(), E->getBeginLoc(), | |||
1051 | None, E->getEndLoc()); | |||
1052 | if (Call.isInvalid()) | |||
1053 | return ExprError(); | |||
1054 | ||||
1055 | ExprResult Comma = | |||
1056 | ActOnBinOp(TUScope, E->getBeginLoc(), tok::comma, Call.get(), E); | |||
1057 | if (Comma.isInvalid()) | |||
1058 | return ExprError(); | |||
1059 | return Comma.get(); | |||
1060 | } | |||
1061 | ||||
1062 | if (!getLangOpts().CPlusPlus && | |||
1063 | RequireCompleteType(E->getExprLoc(), E->getType(), | |||
1064 | diag::err_call_incomplete_argument)) | |||
1065 | return ExprError(); | |||
1066 | ||||
1067 | return E; | |||
1068 | } | |||
1069 | ||||
1070 | /// Converts an integer to complex float type. Helper function of | |||
1071 | /// UsualArithmeticConversions() | |||
1072 | /// | |||
1073 | /// \return false if the integer expression is an integer type and is | |||
1074 | /// successfully converted to the complex type. | |||
1075 | static bool handleIntegerToComplexFloatConversion(Sema &S, ExprResult &IntExpr, | |||
1076 | ExprResult &ComplexExpr, | |||
1077 | QualType IntTy, | |||
1078 | QualType ComplexTy, | |||
1079 | bool SkipCast) { | |||
1080 | if (IntTy->isComplexType() || IntTy->isRealFloatingType()) return true; | |||
1081 | if (SkipCast) return false; | |||
1082 | if (IntTy->isIntegerType()) { | |||
1083 | QualType fpTy = cast<ComplexType>(ComplexTy)->getElementType(); | |||
1084 | IntExpr = S.ImpCastExprToType(IntExpr.get(), fpTy, CK_IntegralToFloating); | |||
1085 | IntExpr = S.ImpCastExprToType(IntExpr.get(), ComplexTy, | |||
1086 | CK_FloatingRealToComplex); | |||
1087 | } else { | |||
1088 | assert(IntTy->isComplexIntegerType())(static_cast <bool> (IntTy->isComplexIntegerType()) ? void (0) : __assert_fail ("IntTy->isComplexIntegerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1088, __extension__ __PRETTY_FUNCTION__)); | |||
1089 | IntExpr = S.ImpCastExprToType(IntExpr.get(), ComplexTy, | |||
1090 | CK_IntegralComplexToFloatingComplex); | |||
1091 | } | |||
1092 | return false; | |||
1093 | } | |||
1094 | ||||
1095 | /// Handle arithmetic conversion with complex types. Helper function of | |||
1096 | /// UsualArithmeticConversions() | |||
1097 | static QualType handleComplexFloatConversion(Sema &S, ExprResult &LHS, | |||
1098 | ExprResult &RHS, QualType LHSType, | |||
1099 | QualType RHSType, | |||
1100 | bool IsCompAssign) { | |||
1101 | // if we have an integer operand, the result is the complex type. | |||
1102 | if (!handleIntegerToComplexFloatConversion(S, RHS, LHS, RHSType, LHSType, | |||
1103 | /*skipCast*/false)) | |||
1104 | return LHSType; | |||
1105 | if (!handleIntegerToComplexFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
1106 | /*skipCast*/IsCompAssign)) | |||
1107 | return RHSType; | |||
1108 | ||||
1109 | // This handles complex/complex, complex/float, or float/complex. | |||
1110 | // When both operands are complex, the shorter operand is converted to the | |||
1111 | // type of the longer, and that is the type of the result. This corresponds | |||
1112 | // to what is done when combining two real floating-point operands. | |||
1113 | // The fun begins when size promotion occur across type domains. | |||
1114 | // From H&S 6.3.4: When one operand is complex and the other is a real | |||
1115 | // floating-point type, the less precise type is converted, within it's | |||
1116 | // real or complex domain, to the precision of the other type. For example, | |||
1117 | // when combining a "long double" with a "double _Complex", the | |||
1118 | // "double _Complex" is promoted to "long double _Complex". | |||
1119 | ||||
1120 | // Compute the rank of the two types, regardless of whether they are complex. | |||
1121 | int Order = S.Context.getFloatingTypeOrder(LHSType, RHSType); | |||
1122 | ||||
1123 | auto *LHSComplexType = dyn_cast<ComplexType>(LHSType); | |||
1124 | auto *RHSComplexType = dyn_cast<ComplexType>(RHSType); | |||
1125 | QualType LHSElementType = | |||
1126 | LHSComplexType ? LHSComplexType->getElementType() : LHSType; | |||
1127 | QualType RHSElementType = | |||
1128 | RHSComplexType ? RHSComplexType->getElementType() : RHSType; | |||
1129 | ||||
1130 | QualType ResultType = S.Context.getComplexType(LHSElementType); | |||
1131 | if (Order < 0) { | |||
1132 | // Promote the precision of the LHS if not an assignment. | |||
1133 | ResultType = S.Context.getComplexType(RHSElementType); | |||
1134 | if (!IsCompAssign) { | |||
1135 | if (LHSComplexType) | |||
1136 | LHS = | |||
1137 | S.ImpCastExprToType(LHS.get(), ResultType, CK_FloatingComplexCast); | |||
1138 | else | |||
1139 | LHS = S.ImpCastExprToType(LHS.get(), RHSElementType, CK_FloatingCast); | |||
1140 | } | |||
1141 | } else if (Order > 0) { | |||
1142 | // Promote the precision of the RHS. | |||
1143 | if (RHSComplexType) | |||
1144 | RHS = S.ImpCastExprToType(RHS.get(), ResultType, CK_FloatingComplexCast); | |||
1145 | else | |||
1146 | RHS = S.ImpCastExprToType(RHS.get(), LHSElementType, CK_FloatingCast); | |||
1147 | } | |||
1148 | return ResultType; | |||
1149 | } | |||
1150 | ||||
1151 | /// Handle arithmetic conversion from integer to float. Helper function | |||
1152 | /// of UsualArithmeticConversions() | |||
1153 | static QualType handleIntToFloatConversion(Sema &S, ExprResult &FloatExpr, | |||
1154 | ExprResult &IntExpr, | |||
1155 | QualType FloatTy, QualType IntTy, | |||
1156 | bool ConvertFloat, bool ConvertInt) { | |||
1157 | if (IntTy->isIntegerType()) { | |||
1158 | if (ConvertInt) | |||
1159 | // Convert intExpr to the lhs floating point type. | |||
1160 | IntExpr = S.ImpCastExprToType(IntExpr.get(), FloatTy, | |||
1161 | CK_IntegralToFloating); | |||
1162 | return FloatTy; | |||
1163 | } | |||
1164 | ||||
1165 | // Convert both sides to the appropriate complex float. | |||
1166 | assert(IntTy->isComplexIntegerType())(static_cast <bool> (IntTy->isComplexIntegerType()) ? void (0) : __assert_fail ("IntTy->isComplexIntegerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1166, __extension__ __PRETTY_FUNCTION__)); | |||
1167 | QualType result = S.Context.getComplexType(FloatTy); | |||
1168 | ||||
1169 | // _Complex int -> _Complex float | |||
1170 | if (ConvertInt) | |||
1171 | IntExpr = S.ImpCastExprToType(IntExpr.get(), result, | |||
1172 | CK_IntegralComplexToFloatingComplex); | |||
1173 | ||||
1174 | // float -> _Complex float | |||
1175 | if (ConvertFloat) | |||
1176 | FloatExpr = S.ImpCastExprToType(FloatExpr.get(), result, | |||
1177 | CK_FloatingRealToComplex); | |||
1178 | ||||
1179 | return result; | |||
1180 | } | |||
1181 | ||||
1182 | /// Handle arithmethic conversion with floating point types. Helper | |||
1183 | /// function of UsualArithmeticConversions() | |||
1184 | static QualType handleFloatConversion(Sema &S, ExprResult &LHS, | |||
1185 | ExprResult &RHS, QualType LHSType, | |||
1186 | QualType RHSType, bool IsCompAssign) { | |||
1187 | bool LHSFloat = LHSType->isRealFloatingType(); | |||
1188 | bool RHSFloat = RHSType->isRealFloatingType(); | |||
1189 | ||||
1190 | // N1169 4.1.4: If one of the operands has a floating type and the other | |||
1191 | // operand has a fixed-point type, the fixed-point operand | |||
1192 | // is converted to the floating type [...] | |||
1193 | if (LHSType->isFixedPointType() || RHSType->isFixedPointType()) { | |||
1194 | if (LHSFloat) | |||
1195 | RHS = S.ImpCastExprToType(RHS.get(), LHSType, CK_FixedPointToFloating); | |||
1196 | else if (!IsCompAssign) | |||
1197 | LHS = S.ImpCastExprToType(LHS.get(), RHSType, CK_FixedPointToFloating); | |||
1198 | return LHSFloat ? LHSType : RHSType; | |||
1199 | } | |||
1200 | ||||
1201 | // If we have two real floating types, convert the smaller operand | |||
1202 | // to the bigger result. | |||
1203 | if (LHSFloat && RHSFloat) { | |||
1204 | int order = S.Context.getFloatingTypeOrder(LHSType, RHSType); | |||
1205 | if (order > 0) { | |||
1206 | RHS = S.ImpCastExprToType(RHS.get(), LHSType, CK_FloatingCast); | |||
1207 | return LHSType; | |||
1208 | } | |||
1209 | ||||
1210 | assert(order < 0 && "illegal float comparison")(static_cast <bool> (order < 0 && "illegal float comparison" ) ? void (0) : __assert_fail ("order < 0 && \"illegal float comparison\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1210, __extension__ __PRETTY_FUNCTION__)); | |||
1211 | if (!IsCompAssign) | |||
1212 | LHS = S.ImpCastExprToType(LHS.get(), RHSType, CK_FloatingCast); | |||
1213 | return RHSType; | |||
1214 | } | |||
1215 | ||||
1216 | if (LHSFloat) { | |||
1217 | // Half FP has to be promoted to float unless it is natively supported | |||
1218 | if (LHSType->isHalfType() && !S.getLangOpts().NativeHalfType) | |||
1219 | LHSType = S.Context.FloatTy; | |||
1220 | ||||
1221 | return handleIntToFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
1222 | /*ConvertFloat=*/!IsCompAssign, | |||
1223 | /*ConvertInt=*/ true); | |||
1224 | } | |||
1225 | assert(RHSFloat)(static_cast <bool> (RHSFloat) ? void (0) : __assert_fail ("RHSFloat", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1225, __extension__ __PRETTY_FUNCTION__)); | |||
1226 | return handleIntToFloatConversion(S, RHS, LHS, RHSType, LHSType, | |||
1227 | /*ConvertFloat=*/ true, | |||
1228 | /*ConvertInt=*/!IsCompAssign); | |||
1229 | } | |||
1230 | ||||
1231 | /// Diagnose attempts to convert between __float128 and long double if | |||
1232 | /// there is no support for such conversion. Helper function of | |||
1233 | /// UsualArithmeticConversions(). | |||
1234 | static bool unsupportedTypeConversion(const Sema &S, QualType LHSType, | |||
1235 | QualType RHSType) { | |||
1236 | /* No issue converting if at least one of the types is not a floating point | |||
1237 | type or the two types have the same rank. | |||
1238 | */ | |||
1239 | if (!LHSType->isFloatingType() || !RHSType->isFloatingType() || | |||
1240 | S.Context.getFloatingTypeOrder(LHSType, RHSType) == 0) | |||
1241 | return false; | |||
1242 | ||||
1243 | assert(LHSType->isFloatingType() && RHSType->isFloatingType() &&(static_cast <bool> (LHSType->isFloatingType() && RHSType->isFloatingType() && "The remaining types must be floating point types." ) ? void (0) : __assert_fail ("LHSType->isFloatingType() && RHSType->isFloatingType() && \"The remaining types must be floating point types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1244, __extension__ __PRETTY_FUNCTION__)) | |||
1244 | "The remaining types must be floating point types.")(static_cast <bool> (LHSType->isFloatingType() && RHSType->isFloatingType() && "The remaining types must be floating point types." ) ? void (0) : __assert_fail ("LHSType->isFloatingType() && RHSType->isFloatingType() && \"The remaining types must be floating point types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1244, __extension__ __PRETTY_FUNCTION__)); | |||
1245 | ||||
1246 | auto *LHSComplex = LHSType->getAs<ComplexType>(); | |||
1247 | auto *RHSComplex = RHSType->getAs<ComplexType>(); | |||
1248 | ||||
1249 | QualType LHSElemType = LHSComplex ? | |||
1250 | LHSComplex->getElementType() : LHSType; | |||
1251 | QualType RHSElemType = RHSComplex ? | |||
1252 | RHSComplex->getElementType() : RHSType; | |||
1253 | ||||
1254 | // No issue if the two types have the same representation | |||
1255 | if (&S.Context.getFloatTypeSemantics(LHSElemType) == | |||
1256 | &S.Context.getFloatTypeSemantics(RHSElemType)) | |||
1257 | return false; | |||
1258 | ||||
1259 | bool Float128AndLongDouble = (LHSElemType == S.Context.Float128Ty && | |||
1260 | RHSElemType == S.Context.LongDoubleTy); | |||
1261 | Float128AndLongDouble |= (LHSElemType == S.Context.LongDoubleTy && | |||
1262 | RHSElemType == S.Context.Float128Ty); | |||
1263 | ||||
1264 | // We've handled the situation where __float128 and long double have the same | |||
1265 | // representation. We allow all conversions for all possible long double types | |||
1266 | // except PPC's double double. | |||
1267 | return Float128AndLongDouble && | |||
1268 | (&S.Context.getFloatTypeSemantics(S.Context.LongDoubleTy) == | |||
1269 | &llvm::APFloat::PPCDoubleDouble()); | |||
1270 | } | |||
1271 | ||||
1272 | typedef ExprResult PerformCastFn(Sema &S, Expr *operand, QualType toType); | |||
1273 | ||||
1274 | namespace { | |||
1275 | /// These helper callbacks are placed in an anonymous namespace to | |||
1276 | /// permit their use as function template parameters. | |||
1277 | ExprResult doIntegralCast(Sema &S, Expr *op, QualType toType) { | |||
1278 | return S.ImpCastExprToType(op, toType, CK_IntegralCast); | |||
1279 | } | |||
1280 | ||||
1281 | ExprResult doComplexIntegralCast(Sema &S, Expr *op, QualType toType) { | |||
1282 | return S.ImpCastExprToType(op, S.Context.getComplexType(toType), | |||
1283 | CK_IntegralComplexCast); | |||
1284 | } | |||
1285 | } | |||
1286 | ||||
1287 | /// Handle integer arithmetic conversions. Helper function of | |||
1288 | /// UsualArithmeticConversions() | |||
1289 | template <PerformCastFn doLHSCast, PerformCastFn doRHSCast> | |||
1290 | static QualType handleIntegerConversion(Sema &S, ExprResult &LHS, | |||
1291 | ExprResult &RHS, QualType LHSType, | |||
1292 | QualType RHSType, bool IsCompAssign) { | |||
1293 | // The rules for this case are in C99 6.3.1.8 | |||
1294 | int order = S.Context.getIntegerTypeOrder(LHSType, RHSType); | |||
1295 | bool LHSSigned = LHSType->hasSignedIntegerRepresentation(); | |||
1296 | bool RHSSigned = RHSType->hasSignedIntegerRepresentation(); | |||
1297 | if (LHSSigned == RHSSigned) { | |||
1298 | // Same signedness; use the higher-ranked type | |||
1299 | if (order >= 0) { | |||
1300 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1301 | return LHSType; | |||
1302 | } else if (!IsCompAssign) | |||
1303 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1304 | return RHSType; | |||
1305 | } else if (order != (LHSSigned ? 1 : -1)) { | |||
1306 | // The unsigned type has greater than or equal rank to the | |||
1307 | // signed type, so use the unsigned type | |||
1308 | if (RHSSigned) { | |||
1309 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1310 | return LHSType; | |||
1311 | } else if (!IsCompAssign) | |||
1312 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1313 | return RHSType; | |||
1314 | } else if (S.Context.getIntWidth(LHSType) != S.Context.getIntWidth(RHSType)) { | |||
1315 | // The two types are different widths; if we are here, that | |||
1316 | // means the signed type is larger than the unsigned type, so | |||
1317 | // use the signed type. | |||
1318 | if (LHSSigned) { | |||
1319 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1320 | return LHSType; | |||
1321 | } else if (!IsCompAssign) | |||
1322 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1323 | return RHSType; | |||
1324 | } else { | |||
1325 | // The signed type is higher-ranked than the unsigned type, | |||
1326 | // but isn't actually any bigger (like unsigned int and long | |||
1327 | // on most 32-bit systems). Use the unsigned type corresponding | |||
1328 | // to the signed type. | |||
1329 | QualType result = | |||
1330 | S.Context.getCorrespondingUnsignedType(LHSSigned ? LHSType : RHSType); | |||
1331 | RHS = (*doRHSCast)(S, RHS.get(), result); | |||
1332 | if (!IsCompAssign) | |||
1333 | LHS = (*doLHSCast)(S, LHS.get(), result); | |||
1334 | return result; | |||
1335 | } | |||
1336 | } | |||
1337 | ||||
1338 | /// Handle conversions with GCC complex int extension. Helper function | |||
1339 | /// of UsualArithmeticConversions() | |||
1340 | static QualType handleComplexIntConversion(Sema &S, ExprResult &LHS, | |||
1341 | ExprResult &RHS, QualType LHSType, | |||
1342 | QualType RHSType, | |||
1343 | bool IsCompAssign) { | |||
1344 | const ComplexType *LHSComplexInt = LHSType->getAsComplexIntegerType(); | |||
1345 | const ComplexType *RHSComplexInt = RHSType->getAsComplexIntegerType(); | |||
1346 | ||||
1347 | if (LHSComplexInt && RHSComplexInt) { | |||
1348 | QualType LHSEltType = LHSComplexInt->getElementType(); | |||
1349 | QualType RHSEltType = RHSComplexInt->getElementType(); | |||
1350 | QualType ScalarType = | |||
1351 | handleIntegerConversion<doComplexIntegralCast, doComplexIntegralCast> | |||
1352 | (S, LHS, RHS, LHSEltType, RHSEltType, IsCompAssign); | |||
1353 | ||||
1354 | return S.Context.getComplexType(ScalarType); | |||
1355 | } | |||
1356 | ||||
1357 | if (LHSComplexInt) { | |||
1358 | QualType LHSEltType = LHSComplexInt->getElementType(); | |||
1359 | QualType ScalarType = | |||
1360 | handleIntegerConversion<doComplexIntegralCast, doIntegralCast> | |||
1361 | (S, LHS, RHS, LHSEltType, RHSType, IsCompAssign); | |||
1362 | QualType ComplexType = S.Context.getComplexType(ScalarType); | |||
1363 | RHS = S.ImpCastExprToType(RHS.get(), ComplexType, | |||
1364 | CK_IntegralRealToComplex); | |||
1365 | ||||
1366 | return ComplexType; | |||
1367 | } | |||
1368 | ||||
1369 | assert(RHSComplexInt)(static_cast <bool> (RHSComplexInt) ? void (0) : __assert_fail ("RHSComplexInt", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1369, __extension__ __PRETTY_FUNCTION__)); | |||
1370 | ||||
1371 | QualType RHSEltType = RHSComplexInt->getElementType(); | |||
1372 | QualType ScalarType = | |||
1373 | handleIntegerConversion<doIntegralCast, doComplexIntegralCast> | |||
1374 | (S, LHS, RHS, LHSType, RHSEltType, IsCompAssign); | |||
1375 | QualType ComplexType = S.Context.getComplexType(ScalarType); | |||
1376 | ||||
1377 | if (!IsCompAssign) | |||
1378 | LHS = S.ImpCastExprToType(LHS.get(), ComplexType, | |||
1379 | CK_IntegralRealToComplex); | |||
1380 | return ComplexType; | |||
1381 | } | |||
1382 | ||||
1383 | /// Return the rank of a given fixed point or integer type. The value itself | |||
1384 | /// doesn't matter, but the values must be increasing with proper increasing | |||
1385 | /// rank as described in N1169 4.1.1. | |||
1386 | static unsigned GetFixedPointRank(QualType Ty) { | |||
1387 | const auto *BTy = Ty->getAs<BuiltinType>(); | |||
1388 | assert(BTy && "Expected a builtin type.")(static_cast <bool> (BTy && "Expected a builtin type." ) ? void (0) : __assert_fail ("BTy && \"Expected a builtin type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1388, __extension__ __PRETTY_FUNCTION__)); | |||
1389 | ||||
1390 | switch (BTy->getKind()) { | |||
1391 | case BuiltinType::ShortFract: | |||
1392 | case BuiltinType::UShortFract: | |||
1393 | case BuiltinType::SatShortFract: | |||
1394 | case BuiltinType::SatUShortFract: | |||
1395 | return 1; | |||
1396 | case BuiltinType::Fract: | |||
1397 | case BuiltinType::UFract: | |||
1398 | case BuiltinType::SatFract: | |||
1399 | case BuiltinType::SatUFract: | |||
1400 | return 2; | |||
1401 | case BuiltinType::LongFract: | |||
1402 | case BuiltinType::ULongFract: | |||
1403 | case BuiltinType::SatLongFract: | |||
1404 | case BuiltinType::SatULongFract: | |||
1405 | return 3; | |||
1406 | case BuiltinType::ShortAccum: | |||
1407 | case BuiltinType::UShortAccum: | |||
1408 | case BuiltinType::SatShortAccum: | |||
1409 | case BuiltinType::SatUShortAccum: | |||
1410 | return 4; | |||
1411 | case BuiltinType::Accum: | |||
1412 | case BuiltinType::UAccum: | |||
1413 | case BuiltinType::SatAccum: | |||
1414 | case BuiltinType::SatUAccum: | |||
1415 | return 5; | |||
1416 | case BuiltinType::LongAccum: | |||
1417 | case BuiltinType::ULongAccum: | |||
1418 | case BuiltinType::SatLongAccum: | |||
1419 | case BuiltinType::SatULongAccum: | |||
1420 | return 6; | |||
1421 | default: | |||
1422 | if (BTy->isInteger()) | |||
1423 | return 0; | |||
1424 | llvm_unreachable("Unexpected fixed point or integer type")::llvm::llvm_unreachable_internal("Unexpected fixed point or integer type" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1424); | |||
1425 | } | |||
1426 | } | |||
1427 | ||||
1428 | /// handleFixedPointConversion - Fixed point operations between fixed | |||
1429 | /// point types and integers or other fixed point types do not fall under | |||
1430 | /// usual arithmetic conversion since these conversions could result in loss | |||
1431 | /// of precsision (N1169 4.1.4). These operations should be calculated with | |||
1432 | /// the full precision of their result type (N1169 4.1.6.2.1). | |||
1433 | static QualType handleFixedPointConversion(Sema &S, QualType LHSTy, | |||
1434 | QualType RHSTy) { | |||
1435 | assert((LHSTy->isFixedPointType() || RHSTy->isFixedPointType()) &&(static_cast <bool> ((LHSTy->isFixedPointType() || RHSTy ->isFixedPointType()) && "Expected at least one of the operands to be a fixed point type" ) ? void (0) : __assert_fail ("(LHSTy->isFixedPointType() || RHSTy->isFixedPointType()) && \"Expected at least one of the operands to be a fixed point type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1436, __extension__ __PRETTY_FUNCTION__)) | |||
1436 | "Expected at least one of the operands to be a fixed point type")(static_cast <bool> ((LHSTy->isFixedPointType() || RHSTy ->isFixedPointType()) && "Expected at least one of the operands to be a fixed point type" ) ? void (0) : __assert_fail ("(LHSTy->isFixedPointType() || RHSTy->isFixedPointType()) && \"Expected at least one of the operands to be a fixed point type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1436, __extension__ __PRETTY_FUNCTION__)); | |||
1437 | assert((LHSTy->isFixedPointOrIntegerType() ||(static_cast <bool> ((LHSTy->isFixedPointOrIntegerType () || RHSTy->isFixedPointOrIntegerType()) && "Special fixed point arithmetic operation conversions are only " "applied to ints or other fixed point types") ? void (0) : __assert_fail ("(LHSTy->isFixedPointOrIntegerType() || RHSTy->isFixedPointOrIntegerType()) && \"Special fixed point arithmetic operation conversions are only \" \"applied to ints or other fixed point types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1440, __extension__ __PRETTY_FUNCTION__)) | |||
1438 | RHSTy->isFixedPointOrIntegerType()) &&(static_cast <bool> ((LHSTy->isFixedPointOrIntegerType () || RHSTy->isFixedPointOrIntegerType()) && "Special fixed point arithmetic operation conversions are only " "applied to ints or other fixed point types") ? void (0) : __assert_fail ("(LHSTy->isFixedPointOrIntegerType() || RHSTy->isFixedPointOrIntegerType()) && \"Special fixed point arithmetic operation conversions are only \" \"applied to ints or other fixed point types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1440, __extension__ __PRETTY_FUNCTION__)) | |||
1439 | "Special fixed point arithmetic operation conversions are only "(static_cast <bool> ((LHSTy->isFixedPointOrIntegerType () || RHSTy->isFixedPointOrIntegerType()) && "Special fixed point arithmetic operation conversions are only " "applied to ints or other fixed point types") ? void (0) : __assert_fail ("(LHSTy->isFixedPointOrIntegerType() || RHSTy->isFixedPointOrIntegerType()) && \"Special fixed point arithmetic operation conversions are only \" \"applied to ints or other fixed point types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1440, __extension__ __PRETTY_FUNCTION__)) | |||
1440 | "applied to ints or other fixed point types")(static_cast <bool> ((LHSTy->isFixedPointOrIntegerType () || RHSTy->isFixedPointOrIntegerType()) && "Special fixed point arithmetic operation conversions are only " "applied to ints or other fixed point types") ? void (0) : __assert_fail ("(LHSTy->isFixedPointOrIntegerType() || RHSTy->isFixedPointOrIntegerType()) && \"Special fixed point arithmetic operation conversions are only \" \"applied to ints or other fixed point types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1440, __extension__ __PRETTY_FUNCTION__)); | |||
1441 | ||||
1442 | // If one operand has signed fixed-point type and the other operand has | |||
1443 | // unsigned fixed-point type, then the unsigned fixed-point operand is | |||
1444 | // converted to its corresponding signed fixed-point type and the resulting | |||
1445 | // type is the type of the converted operand. | |||
1446 | if (RHSTy->isSignedFixedPointType() && LHSTy->isUnsignedFixedPointType()) | |||
1447 | LHSTy = S.Context.getCorrespondingSignedFixedPointType(LHSTy); | |||
1448 | else if (RHSTy->isUnsignedFixedPointType() && LHSTy->isSignedFixedPointType()) | |||
1449 | RHSTy = S.Context.getCorrespondingSignedFixedPointType(RHSTy); | |||
1450 | ||||
1451 | // The result type is the type with the highest rank, whereby a fixed-point | |||
1452 | // conversion rank is always greater than an integer conversion rank; if the | |||
1453 | // type of either of the operands is a saturating fixedpoint type, the result | |||
1454 | // type shall be the saturating fixed-point type corresponding to the type | |||
1455 | // with the highest rank; the resulting value is converted (taking into | |||
1456 | // account rounding and overflow) to the precision of the resulting type. | |||
1457 | // Same ranks between signed and unsigned types are resolved earlier, so both | |||
1458 | // types are either signed or both unsigned at this point. | |||
1459 | unsigned LHSTyRank = GetFixedPointRank(LHSTy); | |||
1460 | unsigned RHSTyRank = GetFixedPointRank(RHSTy); | |||
1461 | ||||
1462 | QualType ResultTy = LHSTyRank > RHSTyRank ? LHSTy : RHSTy; | |||
1463 | ||||
1464 | if (LHSTy->isSaturatedFixedPointType() || RHSTy->isSaturatedFixedPointType()) | |||
1465 | ResultTy = S.Context.getCorrespondingSaturatedType(ResultTy); | |||
1466 | ||||
1467 | return ResultTy; | |||
1468 | } | |||
1469 | ||||
1470 | /// Check that the usual arithmetic conversions can be performed on this pair of | |||
1471 | /// expressions that might be of enumeration type. | |||
1472 | static void checkEnumArithmeticConversions(Sema &S, Expr *LHS, Expr *RHS, | |||
1473 | SourceLocation Loc, | |||
1474 | Sema::ArithConvKind ACK) { | |||
1475 | // C++2a [expr.arith.conv]p1: | |||
1476 | // If one operand is of enumeration type and the other operand is of a | |||
1477 | // different enumeration type or a floating-point type, this behavior is | |||
1478 | // deprecated ([depr.arith.conv.enum]). | |||
1479 | // | |||
1480 | // Warn on this in all language modes. Produce a deprecation warning in C++20. | |||
1481 | // Eventually we will presumably reject these cases (in C++23 onwards?). | |||
1482 | QualType L = LHS->getType(), R = RHS->getType(); | |||
1483 | bool LEnum = L->isUnscopedEnumerationType(), | |||
1484 | REnum = R->isUnscopedEnumerationType(); | |||
1485 | bool IsCompAssign = ACK == Sema::ACK_CompAssign; | |||
1486 | if ((!IsCompAssign && LEnum && R->isFloatingType()) || | |||
1487 | (REnum && L->isFloatingType())) { | |||
1488 | S.Diag(Loc, S.getLangOpts().CPlusPlus20 | |||
1489 | ? diag::warn_arith_conv_enum_float_cxx20 | |||
1490 | : diag::warn_arith_conv_enum_float) | |||
1491 | << LHS->getSourceRange() << RHS->getSourceRange() | |||
1492 | << (int)ACK << LEnum << L << R; | |||
1493 | } else if (!IsCompAssign && LEnum && REnum && | |||
1494 | !S.Context.hasSameUnqualifiedType(L, R)) { | |||
1495 | unsigned DiagID; | |||
1496 | if (!L->castAs<EnumType>()->getDecl()->hasNameForLinkage() || | |||
1497 | !R->castAs<EnumType>()->getDecl()->hasNameForLinkage()) { | |||
1498 | // If either enumeration type is unnamed, it's less likely that the | |||
1499 | // user cares about this, but this situation is still deprecated in | |||
1500 | // C++2a. Use a different warning group. | |||
1501 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1502 | ? diag::warn_arith_conv_mixed_anon_enum_types_cxx20 | |||
1503 | : diag::warn_arith_conv_mixed_anon_enum_types; | |||
1504 | } else if (ACK == Sema::ACK_Conditional) { | |||
1505 | // Conditional expressions are separated out because they have | |||
1506 | // historically had a different warning flag. | |||
1507 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1508 | ? diag::warn_conditional_mixed_enum_types_cxx20 | |||
1509 | : diag::warn_conditional_mixed_enum_types; | |||
1510 | } else if (ACK == Sema::ACK_Comparison) { | |||
1511 | // Comparison expressions are separated out because they have | |||
1512 | // historically had a different warning flag. | |||
1513 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1514 | ? diag::warn_comparison_mixed_enum_types_cxx20 | |||
1515 | : diag::warn_comparison_mixed_enum_types; | |||
1516 | } else { | |||
1517 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1518 | ? diag::warn_arith_conv_mixed_enum_types_cxx20 | |||
1519 | : diag::warn_arith_conv_mixed_enum_types; | |||
1520 | } | |||
1521 | S.Diag(Loc, DiagID) << LHS->getSourceRange() << RHS->getSourceRange() | |||
1522 | << (int)ACK << L << R; | |||
1523 | } | |||
1524 | } | |||
1525 | ||||
1526 | /// UsualArithmeticConversions - Performs various conversions that are common to | |||
1527 | /// binary operators (C99 6.3.1.8). If both operands aren't arithmetic, this | |||
1528 | /// routine returns the first non-arithmetic type found. The client is | |||
1529 | /// responsible for emitting appropriate error diagnostics. | |||
1530 | QualType Sema::UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, | |||
1531 | SourceLocation Loc, | |||
1532 | ArithConvKind ACK) { | |||
1533 | checkEnumArithmeticConversions(*this, LHS.get(), RHS.get(), Loc, ACK); | |||
1534 | ||||
1535 | if (ACK != ACK_CompAssign) { | |||
1536 | LHS = UsualUnaryConversions(LHS.get()); | |||
1537 | if (LHS.isInvalid()) | |||
1538 | return QualType(); | |||
1539 | } | |||
1540 | ||||
1541 | RHS = UsualUnaryConversions(RHS.get()); | |||
1542 | if (RHS.isInvalid()) | |||
1543 | return QualType(); | |||
1544 | ||||
1545 | // For conversion purposes, we ignore any qualifiers. | |||
1546 | // For example, "const float" and "float" are equivalent. | |||
1547 | QualType LHSType = | |||
1548 | Context.getCanonicalType(LHS.get()->getType()).getUnqualifiedType(); | |||
1549 | QualType RHSType = | |||
1550 | Context.getCanonicalType(RHS.get()->getType()).getUnqualifiedType(); | |||
1551 | ||||
1552 | // For conversion purposes, we ignore any atomic qualifier on the LHS. | |||
1553 | if (const AtomicType *AtomicLHS = LHSType->getAs<AtomicType>()) | |||
1554 | LHSType = AtomicLHS->getValueType(); | |||
1555 | ||||
1556 | // If both types are identical, no conversion is needed. | |||
1557 | if (LHSType == RHSType) | |||
1558 | return LHSType; | |||
1559 | ||||
1560 | // If either side is a non-arithmetic type (e.g. a pointer), we are done. | |||
1561 | // The caller can deal with this (e.g. pointer + int). | |||
1562 | if (!LHSType->isArithmeticType() || !RHSType->isArithmeticType()) | |||
1563 | return QualType(); | |||
1564 | ||||
1565 | // Apply unary and bitfield promotions to the LHS's type. | |||
1566 | QualType LHSUnpromotedType = LHSType; | |||
1567 | if (LHSType->isPromotableIntegerType()) | |||
1568 | LHSType = Context.getPromotedIntegerType(LHSType); | |||
1569 | QualType LHSBitfieldPromoteTy = Context.isPromotableBitField(LHS.get()); | |||
1570 | if (!LHSBitfieldPromoteTy.isNull()) | |||
1571 | LHSType = LHSBitfieldPromoteTy; | |||
1572 | if (LHSType != LHSUnpromotedType && ACK != ACK_CompAssign) | |||
1573 | LHS = ImpCastExprToType(LHS.get(), LHSType, CK_IntegralCast); | |||
1574 | ||||
1575 | // If both types are identical, no conversion is needed. | |||
1576 | if (LHSType == RHSType) | |||
1577 | return LHSType; | |||
1578 | ||||
1579 | // At this point, we have two different arithmetic types. | |||
1580 | ||||
1581 | // Diagnose attempts to convert between __float128 and long double where | |||
1582 | // such conversions currently can't be handled. | |||
1583 | if (unsupportedTypeConversion(*this, LHSType, RHSType)) | |||
1584 | return QualType(); | |||
1585 | ||||
1586 | // Handle complex types first (C99 6.3.1.8p1). | |||
1587 | if (LHSType->isComplexType() || RHSType->isComplexType()) | |||
1588 | return handleComplexFloatConversion(*this, LHS, RHS, LHSType, RHSType, | |||
1589 | ACK == ACK_CompAssign); | |||
1590 | ||||
1591 | // Now handle "real" floating types (i.e. float, double, long double). | |||
1592 | if (LHSType->isRealFloatingType() || RHSType->isRealFloatingType()) | |||
1593 | return handleFloatConversion(*this, LHS, RHS, LHSType, RHSType, | |||
1594 | ACK == ACK_CompAssign); | |||
1595 | ||||
1596 | // Handle GCC complex int extension. | |||
1597 | if (LHSType->isComplexIntegerType() || RHSType->isComplexIntegerType()) | |||
1598 | return handleComplexIntConversion(*this, LHS, RHS, LHSType, RHSType, | |||
1599 | ACK == ACK_CompAssign); | |||
1600 | ||||
1601 | if (LHSType->isFixedPointType() || RHSType->isFixedPointType()) | |||
1602 | return handleFixedPointConversion(*this, LHSType, RHSType); | |||
1603 | ||||
1604 | // Finally, we have two differing integer types. | |||
1605 | return handleIntegerConversion<doIntegralCast, doIntegralCast> | |||
1606 | (*this, LHS, RHS, LHSType, RHSType, ACK == ACK_CompAssign); | |||
1607 | } | |||
1608 | ||||
1609 | //===----------------------------------------------------------------------===// | |||
1610 | // Semantic Analysis for various Expression Types | |||
1611 | //===----------------------------------------------------------------------===// | |||
1612 | ||||
1613 | ||||
1614 | ExprResult | |||
1615 | Sema::ActOnGenericSelectionExpr(SourceLocation KeyLoc, | |||
1616 | SourceLocation DefaultLoc, | |||
1617 | SourceLocation RParenLoc, | |||
1618 | Expr *ControllingExpr, | |||
1619 | ArrayRef<ParsedType> ArgTypes, | |||
1620 | ArrayRef<Expr *> ArgExprs) { | |||
1621 | unsigned NumAssocs = ArgTypes.size(); | |||
1622 | assert(NumAssocs == ArgExprs.size())(static_cast <bool> (NumAssocs == ArgExprs.size()) ? void (0) : __assert_fail ("NumAssocs == ArgExprs.size()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1622, __extension__ __PRETTY_FUNCTION__)); | |||
1623 | ||||
1624 | TypeSourceInfo **Types = new TypeSourceInfo*[NumAssocs]; | |||
1625 | for (unsigned i = 0; i < NumAssocs; ++i) { | |||
1626 | if (ArgTypes[i]) | |||
1627 | (void) GetTypeFromParser(ArgTypes[i], &Types[i]); | |||
1628 | else | |||
1629 | Types[i] = nullptr; | |||
1630 | } | |||
1631 | ||||
1632 | ExprResult ER = CreateGenericSelectionExpr(KeyLoc, DefaultLoc, RParenLoc, | |||
1633 | ControllingExpr, | |||
1634 | llvm::makeArrayRef(Types, NumAssocs), | |||
1635 | ArgExprs); | |||
1636 | delete [] Types; | |||
1637 | return ER; | |||
1638 | } | |||
1639 | ||||
1640 | ExprResult | |||
1641 | Sema::CreateGenericSelectionExpr(SourceLocation KeyLoc, | |||
1642 | SourceLocation DefaultLoc, | |||
1643 | SourceLocation RParenLoc, | |||
1644 | Expr *ControllingExpr, | |||
1645 | ArrayRef<TypeSourceInfo *> Types, | |||
1646 | ArrayRef<Expr *> Exprs) { | |||
1647 | unsigned NumAssocs = Types.size(); | |||
1648 | assert(NumAssocs == Exprs.size())(static_cast <bool> (NumAssocs == Exprs.size()) ? void ( 0) : __assert_fail ("NumAssocs == Exprs.size()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1648, __extension__ __PRETTY_FUNCTION__)); | |||
1649 | ||||
1650 | // Decay and strip qualifiers for the controlling expression type, and handle | |||
1651 | // placeholder type replacement. See committee discussion from WG14 DR423. | |||
1652 | { | |||
1653 | EnterExpressionEvaluationContext Unevaluated( | |||
1654 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | |||
1655 | ExprResult R = DefaultFunctionArrayLvalueConversion(ControllingExpr); | |||
1656 | if (R.isInvalid()) | |||
1657 | return ExprError(); | |||
1658 | ControllingExpr = R.get(); | |||
1659 | } | |||
1660 | ||||
1661 | // The controlling expression is an unevaluated operand, so side effects are | |||
1662 | // likely unintended. | |||
1663 | if (!inTemplateInstantiation() && | |||
1664 | ControllingExpr->HasSideEffects(Context, false)) | |||
1665 | Diag(ControllingExpr->getExprLoc(), | |||
1666 | diag::warn_side_effects_unevaluated_context); | |||
1667 | ||||
1668 | bool TypeErrorFound = false, | |||
1669 | IsResultDependent = ControllingExpr->isTypeDependent(), | |||
1670 | ContainsUnexpandedParameterPack | |||
1671 | = ControllingExpr->containsUnexpandedParameterPack(); | |||
1672 | ||||
1673 | for (unsigned i = 0; i < NumAssocs; ++i) { | |||
1674 | if (Exprs[i]->containsUnexpandedParameterPack()) | |||
1675 | ContainsUnexpandedParameterPack = true; | |||
1676 | ||||
1677 | if (Types[i]) { | |||
1678 | if (Types[i]->getType()->containsUnexpandedParameterPack()) | |||
1679 | ContainsUnexpandedParameterPack = true; | |||
1680 | ||||
1681 | if (Types[i]->getType()->isDependentType()) { | |||
1682 | IsResultDependent = true; | |||
1683 | } else { | |||
1684 | // C11 6.5.1.1p2 "The type name in a generic association shall specify a | |||
1685 | // complete object type other than a variably modified type." | |||
1686 | unsigned D = 0; | |||
1687 | if (Types[i]->getType()->isIncompleteType()) | |||
1688 | D = diag::err_assoc_type_incomplete; | |||
1689 | else if (!Types[i]->getType()->isObjectType()) | |||
1690 | D = diag::err_assoc_type_nonobject; | |||
1691 | else if (Types[i]->getType()->isVariablyModifiedType()) | |||
1692 | D = diag::err_assoc_type_variably_modified; | |||
1693 | ||||
1694 | if (D != 0) { | |||
1695 | Diag(Types[i]->getTypeLoc().getBeginLoc(), D) | |||
1696 | << Types[i]->getTypeLoc().getSourceRange() | |||
1697 | << Types[i]->getType(); | |||
1698 | TypeErrorFound = true; | |||
1699 | } | |||
1700 | ||||
1701 | // C11 6.5.1.1p2 "No two generic associations in the same generic | |||
1702 | // selection shall specify compatible types." | |||
1703 | for (unsigned j = i+1; j < NumAssocs; ++j) | |||
1704 | if (Types[j] && !Types[j]->getType()->isDependentType() && | |||
1705 | Context.typesAreCompatible(Types[i]->getType(), | |||
1706 | Types[j]->getType())) { | |||
1707 | Diag(Types[j]->getTypeLoc().getBeginLoc(), | |||
1708 | diag::err_assoc_compatible_types) | |||
1709 | << Types[j]->getTypeLoc().getSourceRange() | |||
1710 | << Types[j]->getType() | |||
1711 | << Types[i]->getType(); | |||
1712 | Diag(Types[i]->getTypeLoc().getBeginLoc(), | |||
1713 | diag::note_compat_assoc) | |||
1714 | << Types[i]->getTypeLoc().getSourceRange() | |||
1715 | << Types[i]->getType(); | |||
1716 | TypeErrorFound = true; | |||
1717 | } | |||
1718 | } | |||
1719 | } | |||
1720 | } | |||
1721 | if (TypeErrorFound) | |||
1722 | return ExprError(); | |||
1723 | ||||
1724 | // If we determined that the generic selection is result-dependent, don't | |||
1725 | // try to compute the result expression. | |||
1726 | if (IsResultDependent) | |||
1727 | return GenericSelectionExpr::Create(Context, KeyLoc, ControllingExpr, Types, | |||
1728 | Exprs, DefaultLoc, RParenLoc, | |||
1729 | ContainsUnexpandedParameterPack); | |||
1730 | ||||
1731 | SmallVector<unsigned, 1> CompatIndices; | |||
1732 | unsigned DefaultIndex = -1U; | |||
1733 | for (unsigned i = 0; i < NumAssocs; ++i) { | |||
1734 | if (!Types[i]) | |||
1735 | DefaultIndex = i; | |||
1736 | else if (Context.typesAreCompatible(ControllingExpr->getType(), | |||
1737 | Types[i]->getType())) | |||
1738 | CompatIndices.push_back(i); | |||
1739 | } | |||
1740 | ||||
1741 | // C11 6.5.1.1p2 "The controlling expression of a generic selection shall have | |||
1742 | // type compatible with at most one of the types named in its generic | |||
1743 | // association list." | |||
1744 | if (CompatIndices.size() > 1) { | |||
1745 | // We strip parens here because the controlling expression is typically | |||
1746 | // parenthesized in macro definitions. | |||
1747 | ControllingExpr = ControllingExpr->IgnoreParens(); | |||
1748 | Diag(ControllingExpr->getBeginLoc(), diag::err_generic_sel_multi_match) | |||
1749 | << ControllingExpr->getSourceRange() << ControllingExpr->getType() | |||
1750 | << (unsigned)CompatIndices.size(); | |||
1751 | for (unsigned I : CompatIndices) { | |||
1752 | Diag(Types[I]->getTypeLoc().getBeginLoc(), | |||
1753 | diag::note_compat_assoc) | |||
1754 | << Types[I]->getTypeLoc().getSourceRange() | |||
1755 | << Types[I]->getType(); | |||
1756 | } | |||
1757 | return ExprError(); | |||
1758 | } | |||
1759 | ||||
1760 | // C11 6.5.1.1p2 "If a generic selection has no default generic association, | |||
1761 | // its controlling expression shall have type compatible with exactly one of | |||
1762 | // the types named in its generic association list." | |||
1763 | if (DefaultIndex == -1U && CompatIndices.size() == 0) { | |||
1764 | // We strip parens here because the controlling expression is typically | |||
1765 | // parenthesized in macro definitions. | |||
1766 | ControllingExpr = ControllingExpr->IgnoreParens(); | |||
1767 | Diag(ControllingExpr->getBeginLoc(), diag::err_generic_sel_no_match) | |||
1768 | << ControllingExpr->getSourceRange() << ControllingExpr->getType(); | |||
1769 | return ExprError(); | |||
1770 | } | |||
1771 | ||||
1772 | // C11 6.5.1.1p3 "If a generic selection has a generic association with a | |||
1773 | // type name that is compatible with the type of the controlling expression, | |||
1774 | // then the result expression of the generic selection is the expression | |||
1775 | // in that generic association. Otherwise, the result expression of the | |||
1776 | // generic selection is the expression in the default generic association." | |||
1777 | unsigned ResultIndex = | |||
1778 | CompatIndices.size() ? CompatIndices[0] : DefaultIndex; | |||
1779 | ||||
1780 | return GenericSelectionExpr::Create( | |||
1781 | Context, KeyLoc, ControllingExpr, Types, Exprs, DefaultLoc, RParenLoc, | |||
1782 | ContainsUnexpandedParameterPack, ResultIndex); | |||
1783 | } | |||
1784 | ||||
1785 | /// getUDSuffixLoc - Create a SourceLocation for a ud-suffix, given the | |||
1786 | /// location of the token and the offset of the ud-suffix within it. | |||
1787 | static SourceLocation getUDSuffixLoc(Sema &S, SourceLocation TokLoc, | |||
1788 | unsigned Offset) { | |||
1789 | return Lexer::AdvanceToTokenCharacter(TokLoc, Offset, S.getSourceManager(), | |||
1790 | S.getLangOpts()); | |||
1791 | } | |||
1792 | ||||
1793 | /// BuildCookedLiteralOperatorCall - A user-defined literal was found. Look up | |||
1794 | /// the corresponding cooked (non-raw) literal operator, and build a call to it. | |||
1795 | static ExprResult BuildCookedLiteralOperatorCall(Sema &S, Scope *Scope, | |||
1796 | IdentifierInfo *UDSuffix, | |||
1797 | SourceLocation UDSuffixLoc, | |||
1798 | ArrayRef<Expr*> Args, | |||
1799 | SourceLocation LitEndLoc) { | |||
1800 | assert(Args.size() <= 2 && "too many arguments for literal operator")(static_cast <bool> (Args.size() <= 2 && "too many arguments for literal operator" ) ? void (0) : __assert_fail ("Args.size() <= 2 && \"too many arguments for literal operator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1800, __extension__ __PRETTY_FUNCTION__)); | |||
1801 | ||||
1802 | QualType ArgTy[2]; | |||
1803 | for (unsigned ArgIdx = 0; ArgIdx != Args.size(); ++ArgIdx) { | |||
1804 | ArgTy[ArgIdx] = Args[ArgIdx]->getType(); | |||
1805 | if (ArgTy[ArgIdx]->isArrayType()) | |||
1806 | ArgTy[ArgIdx] = S.Context.getArrayDecayedType(ArgTy[ArgIdx]); | |||
1807 | } | |||
1808 | ||||
1809 | DeclarationName OpName = | |||
1810 | S.Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
1811 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
1812 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
1813 | ||||
1814 | LookupResult R(S, OpName, UDSuffixLoc, Sema::LookupOrdinaryName); | |||
1815 | if (S.LookupLiteralOperator(Scope, R, llvm::makeArrayRef(ArgTy, Args.size()), | |||
1816 | /*AllowRaw*/ false, /*AllowTemplate*/ false, | |||
1817 | /*AllowStringTemplatePack*/ false, | |||
1818 | /*DiagnoseMissing*/ true) == Sema::LOLR_Error) | |||
1819 | return ExprError(); | |||
1820 | ||||
1821 | return S.BuildLiteralOperatorCall(R, OpNameInfo, Args, LitEndLoc); | |||
1822 | } | |||
1823 | ||||
1824 | /// ActOnStringLiteral - The specified tokens were lexed as pasted string | |||
1825 | /// fragments (e.g. "foo" "bar" L"baz"). The result string has to handle string | |||
1826 | /// concatenation ([C99 5.1.1.2, translation phase #6]), so it may come from | |||
1827 | /// multiple tokens. However, the common case is that StringToks points to one | |||
1828 | /// string. | |||
1829 | /// | |||
1830 | ExprResult | |||
1831 | Sema::ActOnStringLiteral(ArrayRef<Token> StringToks, Scope *UDLScope) { | |||
1832 | assert(!StringToks.empty() && "Must have at least one string!")(static_cast <bool> (!StringToks.empty() && "Must have at least one string!" ) ? void (0) : __assert_fail ("!StringToks.empty() && \"Must have at least one string!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1832, __extension__ __PRETTY_FUNCTION__)); | |||
1833 | ||||
1834 | StringLiteralParser Literal(StringToks, PP); | |||
1835 | if (Literal.hadError) | |||
1836 | return ExprError(); | |||
1837 | ||||
1838 | SmallVector<SourceLocation, 4> StringTokLocs; | |||
1839 | for (const Token &Tok : StringToks) | |||
1840 | StringTokLocs.push_back(Tok.getLocation()); | |||
1841 | ||||
1842 | QualType CharTy = Context.CharTy; | |||
1843 | StringLiteral::StringKind Kind = StringLiteral::Ascii; | |||
1844 | if (Literal.isWide()) { | |||
1845 | CharTy = Context.getWideCharType(); | |||
1846 | Kind = StringLiteral::Wide; | |||
1847 | } else if (Literal.isUTF8()) { | |||
1848 | if (getLangOpts().Char8) | |||
1849 | CharTy = Context.Char8Ty; | |||
1850 | Kind = StringLiteral::UTF8; | |||
1851 | } else if (Literal.isUTF16()) { | |||
1852 | CharTy = Context.Char16Ty; | |||
1853 | Kind = StringLiteral::UTF16; | |||
1854 | } else if (Literal.isUTF32()) { | |||
1855 | CharTy = Context.Char32Ty; | |||
1856 | Kind = StringLiteral::UTF32; | |||
1857 | } else if (Literal.isPascal()) { | |||
1858 | CharTy = Context.UnsignedCharTy; | |||
1859 | } | |||
1860 | ||||
1861 | // Warn on initializing an array of char from a u8 string literal; this | |||
1862 | // becomes ill-formed in C++2a. | |||
1863 | if (getLangOpts().CPlusPlus && !getLangOpts().CPlusPlus20 && | |||
1864 | !getLangOpts().Char8 && Kind == StringLiteral::UTF8) { | |||
1865 | Diag(StringTokLocs.front(), diag::warn_cxx20_compat_utf8_string); | |||
1866 | ||||
1867 | // Create removals for all 'u8' prefixes in the string literal(s). This | |||
1868 | // ensures C++2a compatibility (but may change the program behavior when | |||
1869 | // built by non-Clang compilers for which the execution character set is | |||
1870 | // not always UTF-8). | |||
1871 | auto RemovalDiag = PDiag(diag::note_cxx20_compat_utf8_string_remove_u8); | |||
1872 | SourceLocation RemovalDiagLoc; | |||
1873 | for (const Token &Tok : StringToks) { | |||
1874 | if (Tok.getKind() == tok::utf8_string_literal) { | |||
1875 | if (RemovalDiagLoc.isInvalid()) | |||
1876 | RemovalDiagLoc = Tok.getLocation(); | |||
1877 | RemovalDiag << FixItHint::CreateRemoval(CharSourceRange::getCharRange( | |||
1878 | Tok.getLocation(), | |||
1879 | Lexer::AdvanceToTokenCharacter(Tok.getLocation(), 2, | |||
1880 | getSourceManager(), getLangOpts()))); | |||
1881 | } | |||
1882 | } | |||
1883 | Diag(RemovalDiagLoc, RemovalDiag); | |||
1884 | } | |||
1885 | ||||
1886 | QualType StrTy = | |||
1887 | Context.getStringLiteralArrayType(CharTy, Literal.GetNumStringChars()); | |||
1888 | ||||
1889 | // Pass &StringTokLocs[0], StringTokLocs.size() to factory! | |||
1890 | StringLiteral *Lit = StringLiteral::Create(Context, Literal.GetString(), | |||
1891 | Kind, Literal.Pascal, StrTy, | |||
1892 | &StringTokLocs[0], | |||
1893 | StringTokLocs.size()); | |||
1894 | if (Literal.getUDSuffix().empty()) | |||
1895 | return Lit; | |||
1896 | ||||
1897 | // We're building a user-defined literal. | |||
1898 | IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
1899 | SourceLocation UDSuffixLoc = | |||
1900 | getUDSuffixLoc(*this, StringTokLocs[Literal.getUDSuffixToken()], | |||
1901 | Literal.getUDSuffixOffset()); | |||
1902 | ||||
1903 | // Make sure we're allowed user-defined literals here. | |||
1904 | if (!UDLScope) | |||
1905 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_string_udl)); | |||
1906 | ||||
1907 | // C++11 [lex.ext]p5: The literal L is treated as a call of the form | |||
1908 | // operator "" X (str, len) | |||
1909 | QualType SizeType = Context.getSizeType(); | |||
1910 | ||||
1911 | DeclarationName OpName = | |||
1912 | Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
1913 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
1914 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
1915 | ||||
1916 | QualType ArgTy[] = { | |||
1917 | Context.getArrayDecayedType(StrTy), SizeType | |||
1918 | }; | |||
1919 | ||||
1920 | LookupResult R(*this, OpName, UDSuffixLoc, LookupOrdinaryName); | |||
1921 | switch (LookupLiteralOperator(UDLScope, R, ArgTy, | |||
1922 | /*AllowRaw*/ false, /*AllowTemplate*/ true, | |||
1923 | /*AllowStringTemplatePack*/ true, | |||
1924 | /*DiagnoseMissing*/ true, Lit)) { | |||
1925 | ||||
1926 | case LOLR_Cooked: { | |||
1927 | llvm::APInt Len(Context.getIntWidth(SizeType), Literal.GetNumStringChars()); | |||
1928 | IntegerLiteral *LenArg = IntegerLiteral::Create(Context, Len, SizeType, | |||
1929 | StringTokLocs[0]); | |||
1930 | Expr *Args[] = { Lit, LenArg }; | |||
1931 | ||||
1932 | return BuildLiteralOperatorCall(R, OpNameInfo, Args, StringTokLocs.back()); | |||
1933 | } | |||
1934 | ||||
1935 | case LOLR_Template: { | |||
1936 | TemplateArgumentListInfo ExplicitArgs; | |||
1937 | TemplateArgument Arg(Lit); | |||
1938 | TemplateArgumentLocInfo ArgInfo(Lit); | |||
1939 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
1940 | return BuildLiteralOperatorCall(R, OpNameInfo, None, StringTokLocs.back(), | |||
1941 | &ExplicitArgs); | |||
1942 | } | |||
1943 | ||||
1944 | case LOLR_StringTemplatePack: { | |||
1945 | TemplateArgumentListInfo ExplicitArgs; | |||
1946 | ||||
1947 | unsigned CharBits = Context.getIntWidth(CharTy); | |||
1948 | bool CharIsUnsigned = CharTy->isUnsignedIntegerType(); | |||
1949 | llvm::APSInt Value(CharBits, CharIsUnsigned); | |||
1950 | ||||
1951 | TemplateArgument TypeArg(CharTy); | |||
1952 | TemplateArgumentLocInfo TypeArgInfo(Context.getTrivialTypeSourceInfo(CharTy)); | |||
1953 | ExplicitArgs.addArgument(TemplateArgumentLoc(TypeArg, TypeArgInfo)); | |||
1954 | ||||
1955 | for (unsigned I = 0, N = Lit->getLength(); I != N; ++I) { | |||
1956 | Value = Lit->getCodeUnit(I); | |||
1957 | TemplateArgument Arg(Context, Value, CharTy); | |||
1958 | TemplateArgumentLocInfo ArgInfo; | |||
1959 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
1960 | } | |||
1961 | return BuildLiteralOperatorCall(R, OpNameInfo, None, StringTokLocs.back(), | |||
1962 | &ExplicitArgs); | |||
1963 | } | |||
1964 | case LOLR_Raw: | |||
1965 | case LOLR_ErrorNoDiagnostic: | |||
1966 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1966); | |||
1967 | case LOLR_Error: | |||
1968 | return ExprError(); | |||
1969 | } | |||
1970 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1970); | |||
1971 | } | |||
1972 | ||||
1973 | DeclRefExpr * | |||
1974 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
1975 | SourceLocation Loc, | |||
1976 | const CXXScopeSpec *SS) { | |||
1977 | DeclarationNameInfo NameInfo(D->getDeclName(), Loc); | |||
1978 | return BuildDeclRefExpr(D, Ty, VK, NameInfo, SS); | |||
1979 | } | |||
1980 | ||||
1981 | DeclRefExpr * | |||
1982 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
1983 | const DeclarationNameInfo &NameInfo, | |||
1984 | const CXXScopeSpec *SS, NamedDecl *FoundD, | |||
1985 | SourceLocation TemplateKWLoc, | |||
1986 | const TemplateArgumentListInfo *TemplateArgs) { | |||
1987 | NestedNameSpecifierLoc NNS = | |||
1988 | SS ? SS->getWithLocInContext(Context) : NestedNameSpecifierLoc(); | |||
1989 | return BuildDeclRefExpr(D, Ty, VK, NameInfo, NNS, FoundD, TemplateKWLoc, | |||
1990 | TemplateArgs); | |||
1991 | } | |||
1992 | ||||
1993 | // CUDA/HIP: Check whether a captured reference variable is referencing a | |||
1994 | // host variable in a device or host device lambda. | |||
1995 | static bool isCapturingReferenceToHostVarInCUDADeviceLambda(const Sema &S, | |||
1996 | VarDecl *VD) { | |||
1997 | if (!S.getLangOpts().CUDA || !VD->hasInit()) | |||
1998 | return false; | |||
1999 | assert(VD->getType()->isReferenceType())(static_cast <bool> (VD->getType()->isReferenceType ()) ? void (0) : __assert_fail ("VD->getType()->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 1999, __extension__ __PRETTY_FUNCTION__)); | |||
2000 | ||||
2001 | // Check whether the reference variable is referencing a host variable. | |||
2002 | auto *DRE = dyn_cast<DeclRefExpr>(VD->getInit()); | |||
2003 | if (!DRE) | |||
2004 | return false; | |||
2005 | auto *Referee = dyn_cast<VarDecl>(DRE->getDecl()); | |||
2006 | if (!Referee || !Referee->hasGlobalStorage() || | |||
2007 | Referee->hasAttr<CUDADeviceAttr>()) | |||
2008 | return false; | |||
2009 | ||||
2010 | // Check whether the current function is a device or host device lambda. | |||
2011 | // Check whether the reference variable is a capture by getDeclContext() | |||
2012 | // since refersToEnclosingVariableOrCapture() is not ready at this point. | |||
2013 | auto *MD = dyn_cast_or_null<CXXMethodDecl>(S.CurContext); | |||
2014 | if (MD && MD->getParent()->isLambda() && | |||
2015 | MD->getOverloadedOperator() == OO_Call && MD->hasAttr<CUDADeviceAttr>() && | |||
2016 | VD->getDeclContext() != MD) | |||
2017 | return true; | |||
2018 | ||||
2019 | return false; | |||
2020 | } | |||
2021 | ||||
2022 | NonOdrUseReason Sema::getNonOdrUseReasonInCurrentContext(ValueDecl *D) { | |||
2023 | // A declaration named in an unevaluated operand never constitutes an odr-use. | |||
2024 | if (isUnevaluatedContext()) | |||
2025 | return NOUR_Unevaluated; | |||
2026 | ||||
2027 | // C++2a [basic.def.odr]p4: | |||
2028 | // A variable x whose name appears as a potentially-evaluated expression e | |||
2029 | // is odr-used by e unless [...] x is a reference that is usable in | |||
2030 | // constant expressions. | |||
2031 | // CUDA/HIP: | |||
2032 | // If a reference variable referencing a host variable is captured in a | |||
2033 | // device or host device lambda, the value of the referee must be copied | |||
2034 | // to the capture and the reference variable must be treated as odr-use | |||
2035 | // since the value of the referee is not known at compile time and must | |||
2036 | // be loaded from the captured. | |||
2037 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | |||
2038 | if (VD->getType()->isReferenceType() && | |||
2039 | !(getLangOpts().OpenMP && isOpenMPCapturedDecl(D)) && | |||
2040 | !isCapturingReferenceToHostVarInCUDADeviceLambda(*this, VD) && | |||
2041 | VD->isUsableInConstantExpressions(Context)) | |||
2042 | return NOUR_Constant; | |||
2043 | } | |||
2044 | ||||
2045 | // All remaining non-variable cases constitute an odr-use. For variables, we | |||
2046 | // need to wait and see how the expression is used. | |||
2047 | return NOUR_None; | |||
2048 | } | |||
2049 | ||||
2050 | /// BuildDeclRefExpr - Build an expression that references a | |||
2051 | /// declaration that does not require a closure capture. | |||
2052 | DeclRefExpr * | |||
2053 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
2054 | const DeclarationNameInfo &NameInfo, | |||
2055 | NestedNameSpecifierLoc NNS, NamedDecl *FoundD, | |||
2056 | SourceLocation TemplateKWLoc, | |||
2057 | const TemplateArgumentListInfo *TemplateArgs) { | |||
2058 | bool RefersToCapturedVariable = | |||
2059 | isa<VarDecl>(D) && | |||
2060 | NeedToCaptureVariable(cast<VarDecl>(D), NameInfo.getLoc()); | |||
2061 | ||||
2062 | DeclRefExpr *E = DeclRefExpr::Create( | |||
2063 | Context, NNS, TemplateKWLoc, D, RefersToCapturedVariable, NameInfo, Ty, | |||
2064 | VK, FoundD, TemplateArgs, getNonOdrUseReasonInCurrentContext(D)); | |||
2065 | MarkDeclRefReferenced(E); | |||
2066 | ||||
2067 | // C++ [except.spec]p17: | |||
2068 | // An exception-specification is considered to be needed when: | |||
2069 | // - in an expression, the function is the unique lookup result or | |||
2070 | // the selected member of a set of overloaded functions. | |||
2071 | // | |||
2072 | // We delay doing this until after we've built the function reference and | |||
2073 | // marked it as used so that: | |||
2074 | // a) if the function is defaulted, we get errors from defining it before / | |||
2075 | // instead of errors from computing its exception specification, and | |||
2076 | // b) if the function is a defaulted comparison, we can use the body we | |||
2077 | // build when defining it as input to the exception specification | |||
2078 | // computation rather than computing a new body. | |||
2079 | if (auto *FPT = Ty->getAs<FunctionProtoType>()) { | |||
2080 | if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) { | |||
2081 | if (auto *NewFPT = ResolveExceptionSpec(NameInfo.getLoc(), FPT)) | |||
2082 | E->setType(Context.getQualifiedType(NewFPT, Ty.getQualifiers())); | |||
2083 | } | |||
2084 | } | |||
2085 | ||||
2086 | if (getLangOpts().ObjCWeak && isa<VarDecl>(D) && | |||
2087 | Ty.getObjCLifetime() == Qualifiers::OCL_Weak && !isUnevaluatedContext() && | |||
2088 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, E->getBeginLoc())) | |||
2089 | getCurFunction()->recordUseOfWeak(E); | |||
2090 | ||||
2091 | FieldDecl *FD = dyn_cast<FieldDecl>(D); | |||
2092 | if (IndirectFieldDecl *IFD = dyn_cast<IndirectFieldDecl>(D)) | |||
2093 | FD = IFD->getAnonField(); | |||
2094 | if (FD) { | |||
2095 | UnusedPrivateFields.remove(FD); | |||
2096 | // Just in case we're building an illegal pointer-to-member. | |||
2097 | if (FD->isBitField()) | |||
2098 | E->setObjectKind(OK_BitField); | |||
2099 | } | |||
2100 | ||||
2101 | // C++ [expr.prim]/8: The expression [...] is a bit-field if the identifier | |||
2102 | // designates a bit-field. | |||
2103 | if (auto *BD = dyn_cast<BindingDecl>(D)) | |||
2104 | if (auto *BE = BD->getBinding()) | |||
2105 | E->setObjectKind(BE->getObjectKind()); | |||
2106 | ||||
2107 | return E; | |||
2108 | } | |||
2109 | ||||
2110 | /// Decomposes the given name into a DeclarationNameInfo, its location, and | |||
2111 | /// possibly a list of template arguments. | |||
2112 | /// | |||
2113 | /// If this produces template arguments, it is permitted to call | |||
2114 | /// DecomposeTemplateName. | |||
2115 | /// | |||
2116 | /// This actually loses a lot of source location information for | |||
2117 | /// non-standard name kinds; we should consider preserving that in | |||
2118 | /// some way. | |||
2119 | void | |||
2120 | Sema::DecomposeUnqualifiedId(const UnqualifiedId &Id, | |||
2121 | TemplateArgumentListInfo &Buffer, | |||
2122 | DeclarationNameInfo &NameInfo, | |||
2123 | const TemplateArgumentListInfo *&TemplateArgs) { | |||
2124 | if (Id.getKind() == UnqualifiedIdKind::IK_TemplateId) { | |||
2125 | Buffer.setLAngleLoc(Id.TemplateId->LAngleLoc); | |||
2126 | Buffer.setRAngleLoc(Id.TemplateId->RAngleLoc); | |||
2127 | ||||
2128 | ASTTemplateArgsPtr TemplateArgsPtr(Id.TemplateId->getTemplateArgs(), | |||
2129 | Id.TemplateId->NumArgs); | |||
2130 | translateTemplateArguments(TemplateArgsPtr, Buffer); | |||
2131 | ||||
2132 | TemplateName TName = Id.TemplateId->Template.get(); | |||
2133 | SourceLocation TNameLoc = Id.TemplateId->TemplateNameLoc; | |||
2134 | NameInfo = Context.getNameForTemplate(TName, TNameLoc); | |||
2135 | TemplateArgs = &Buffer; | |||
2136 | } else { | |||
2137 | NameInfo = GetNameFromUnqualifiedId(Id); | |||
2138 | TemplateArgs = nullptr; | |||
2139 | } | |||
2140 | } | |||
2141 | ||||
2142 | static void emitEmptyLookupTypoDiagnostic( | |||
2143 | const TypoCorrection &TC, Sema &SemaRef, const CXXScopeSpec &SS, | |||
2144 | DeclarationName Typo, SourceLocation TypoLoc, ArrayRef<Expr *> Args, | |||
2145 | unsigned DiagnosticID, unsigned DiagnosticSuggestID) { | |||
2146 | DeclContext *Ctx = | |||
2147 | SS.isEmpty() ? nullptr : SemaRef.computeDeclContext(SS, false); | |||
2148 | if (!TC) { | |||
2149 | // Emit a special diagnostic for failed member lookups. | |||
2150 | // FIXME: computing the declaration context might fail here (?) | |||
2151 | if (Ctx) | |||
2152 | SemaRef.Diag(TypoLoc, diag::err_no_member) << Typo << Ctx | |||
2153 | << SS.getRange(); | |||
2154 | else | |||
2155 | SemaRef.Diag(TypoLoc, DiagnosticID) << Typo; | |||
2156 | return; | |||
2157 | } | |||
2158 | ||||
2159 | std::string CorrectedStr = TC.getAsString(SemaRef.getLangOpts()); | |||
2160 | bool DroppedSpecifier = | |||
2161 | TC.WillReplaceSpecifier() && Typo.getAsString() == CorrectedStr; | |||
2162 | unsigned NoteID = TC.getCorrectionDeclAs<ImplicitParamDecl>() | |||
2163 | ? diag::note_implicit_param_decl | |||
2164 | : diag::note_previous_decl; | |||
2165 | if (!Ctx) | |||
2166 | SemaRef.diagnoseTypo(TC, SemaRef.PDiag(DiagnosticSuggestID) << Typo, | |||
2167 | SemaRef.PDiag(NoteID)); | |||
2168 | else | |||
2169 | SemaRef.diagnoseTypo(TC, SemaRef.PDiag(diag::err_no_member_suggest) | |||
2170 | << Typo << Ctx << DroppedSpecifier | |||
2171 | << SS.getRange(), | |||
2172 | SemaRef.PDiag(NoteID)); | |||
2173 | } | |||
2174 | ||||
2175 | /// Diagnose a lookup that found results in an enclosing class during error | |||
2176 | /// recovery. This usually indicates that the results were found in a dependent | |||
2177 | /// base class that could not be searched as part of a template definition. | |||
2178 | /// Always issues a diagnostic (though this may be only a warning in MS | |||
2179 | /// compatibility mode). | |||
2180 | /// | |||
2181 | /// Return \c true if the error is unrecoverable, or \c false if the caller | |||
2182 | /// should attempt to recover using these lookup results. | |||
2183 | bool Sema::DiagnoseDependentMemberLookup(LookupResult &R) { | |||
2184 | // During a default argument instantiation the CurContext points | |||
2185 | // to a CXXMethodDecl; but we can't apply a this-> fixit inside a | |||
2186 | // function parameter list, hence add an explicit check. | |||
2187 | bool isDefaultArgument = | |||
2188 | !CodeSynthesisContexts.empty() && | |||
2189 | CodeSynthesisContexts.back().Kind == | |||
2190 | CodeSynthesisContext::DefaultFunctionArgumentInstantiation; | |||
2191 | CXXMethodDecl *CurMethod = dyn_cast<CXXMethodDecl>(CurContext); | |||
2192 | bool isInstance = CurMethod && CurMethod->isInstance() && | |||
2193 | R.getNamingClass() == CurMethod->getParent() && | |||
2194 | !isDefaultArgument; | |||
2195 | ||||
2196 | // There are two ways we can find a class-scope declaration during template | |||
2197 | // instantiation that we did not find in the template definition: if it is a | |||
2198 | // member of a dependent base class, or if it is declared after the point of | |||
2199 | // use in the same class. Distinguish these by comparing the class in which | |||
2200 | // the member was found to the naming class of the lookup. | |||
2201 | unsigned DiagID = diag::err_found_in_dependent_base; | |||
2202 | unsigned NoteID = diag::note_member_declared_at; | |||
2203 | if (R.getRepresentativeDecl()->getDeclContext()->Equals(R.getNamingClass())) { | |||
2204 | DiagID = getLangOpts().MSVCCompat ? diag::ext_found_later_in_class | |||
2205 | : diag::err_found_later_in_class; | |||
2206 | } else if (getLangOpts().MSVCCompat) { | |||
2207 | DiagID = diag::ext_found_in_dependent_base; | |||
2208 | NoteID = diag::note_dependent_member_use; | |||
2209 | } | |||
2210 | ||||
2211 | if (isInstance) { | |||
2212 | // Give a code modification hint to insert 'this->'. | |||
2213 | Diag(R.getNameLoc(), DiagID) | |||
2214 | << R.getLookupName() | |||
2215 | << FixItHint::CreateInsertion(R.getNameLoc(), "this->"); | |||
2216 | CheckCXXThisCapture(R.getNameLoc()); | |||
2217 | } else { | |||
2218 | // FIXME: Add a FixItHint to insert 'Base::' or 'Derived::' (assuming | |||
2219 | // they're not shadowed). | |||
2220 | Diag(R.getNameLoc(), DiagID) << R.getLookupName(); | |||
2221 | } | |||
2222 | ||||
2223 | for (NamedDecl *D : R) | |||
2224 | Diag(D->getLocation(), NoteID); | |||
2225 | ||||
2226 | // Return true if we are inside a default argument instantiation | |||
2227 | // and the found name refers to an instance member function, otherwise | |||
2228 | // the caller will try to create an implicit member call and this is wrong | |||
2229 | // for default arguments. | |||
2230 | // | |||
2231 | // FIXME: Is this special case necessary? We could allow the caller to | |||
2232 | // diagnose this. | |||
2233 | if (isDefaultArgument && ((*R.begin())->isCXXInstanceMember())) { | |||
2234 | Diag(R.getNameLoc(), diag::err_member_call_without_object); | |||
2235 | return true; | |||
2236 | } | |||
2237 | ||||
2238 | // Tell the callee to try to recover. | |||
2239 | return false; | |||
2240 | } | |||
2241 | ||||
2242 | /// Diagnose an empty lookup. | |||
2243 | /// | |||
2244 | /// \return false if new lookup candidates were found | |||
2245 | bool Sema::DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, | |||
2246 | CorrectionCandidateCallback &CCC, | |||
2247 | TemplateArgumentListInfo *ExplicitTemplateArgs, | |||
2248 | ArrayRef<Expr *> Args, TypoExpr **Out) { | |||
2249 | DeclarationName Name = R.getLookupName(); | |||
2250 | ||||
2251 | unsigned diagnostic = diag::err_undeclared_var_use; | |||
2252 | unsigned diagnostic_suggest = diag::err_undeclared_var_use_suggest; | |||
2253 | if (Name.getNameKind() == DeclarationName::CXXOperatorName || | |||
2254 | Name.getNameKind() == DeclarationName::CXXLiteralOperatorName || | |||
2255 | Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { | |||
2256 | diagnostic = diag::err_undeclared_use; | |||
2257 | diagnostic_suggest = diag::err_undeclared_use_suggest; | |||
2258 | } | |||
2259 | ||||
2260 | // If the original lookup was an unqualified lookup, fake an | |||
2261 | // unqualified lookup. This is useful when (for example) the | |||
2262 | // original lookup would not have found something because it was a | |||
2263 | // dependent name. | |||
2264 | DeclContext *DC = SS.isEmpty() ? CurContext : nullptr; | |||
2265 | while (DC) { | |||
2266 | if (isa<CXXRecordDecl>(DC)) { | |||
2267 | LookupQualifiedName(R, DC); | |||
2268 | ||||
2269 | if (!R.empty()) { | |||
2270 | // Don't give errors about ambiguities in this lookup. | |||
2271 | R.suppressDiagnostics(); | |||
2272 | ||||
2273 | // If there's a best viable function among the results, only mention | |||
2274 | // that one in the notes. | |||
2275 | OverloadCandidateSet Candidates(R.getNameLoc(), | |||
2276 | OverloadCandidateSet::CSK_Normal); | |||
2277 | AddOverloadedCallCandidates(R, ExplicitTemplateArgs, Args, Candidates); | |||
2278 | OverloadCandidateSet::iterator Best; | |||
2279 | if (Candidates.BestViableFunction(*this, R.getNameLoc(), Best) == | |||
2280 | OR_Success) { | |||
2281 | R.clear(); | |||
2282 | R.addDecl(Best->FoundDecl.getDecl(), Best->FoundDecl.getAccess()); | |||
2283 | R.resolveKind(); | |||
2284 | } | |||
2285 | ||||
2286 | return DiagnoseDependentMemberLookup(R); | |||
2287 | } | |||
2288 | ||||
2289 | R.clear(); | |||
2290 | } | |||
2291 | ||||
2292 | DC = DC->getLookupParent(); | |||
2293 | } | |||
2294 | ||||
2295 | // We didn't find anything, so try to correct for a typo. | |||
2296 | TypoCorrection Corrected; | |||
2297 | if (S && Out) { | |||
2298 | SourceLocation TypoLoc = R.getNameLoc(); | |||
2299 | assert(!ExplicitTemplateArgs &&(static_cast <bool> (!ExplicitTemplateArgs && "Diagnosing an empty lookup with explicit template args!" ) ? void (0) : __assert_fail ("!ExplicitTemplateArgs && \"Diagnosing an empty lookup with explicit template args!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2300, __extension__ __PRETTY_FUNCTION__)) | |||
2300 | "Diagnosing an empty lookup with explicit template args!")(static_cast <bool> (!ExplicitTemplateArgs && "Diagnosing an empty lookup with explicit template args!" ) ? void (0) : __assert_fail ("!ExplicitTemplateArgs && \"Diagnosing an empty lookup with explicit template args!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2300, __extension__ __PRETTY_FUNCTION__)); | |||
2301 | *Out = CorrectTypoDelayed( | |||
2302 | R.getLookupNameInfo(), R.getLookupKind(), S, &SS, CCC, | |||
2303 | [=](const TypoCorrection &TC) { | |||
2304 | emitEmptyLookupTypoDiagnostic(TC, *this, SS, Name, TypoLoc, Args, | |||
2305 | diagnostic, diagnostic_suggest); | |||
2306 | }, | |||
2307 | nullptr, CTK_ErrorRecovery); | |||
2308 | if (*Out) | |||
2309 | return true; | |||
2310 | } else if (S && | |||
2311 | (Corrected = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), | |||
2312 | S, &SS, CCC, CTK_ErrorRecovery))) { | |||
2313 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
2314 | bool DroppedSpecifier = | |||
2315 | Corrected.WillReplaceSpecifier() && Name.getAsString() == CorrectedStr; | |||
2316 | R.setLookupName(Corrected.getCorrection()); | |||
2317 | ||||
2318 | bool AcceptableWithRecovery = false; | |||
2319 | bool AcceptableWithoutRecovery = false; | |||
2320 | NamedDecl *ND = Corrected.getFoundDecl(); | |||
2321 | if (ND) { | |||
2322 | if (Corrected.isOverloaded()) { | |||
2323 | OverloadCandidateSet OCS(R.getNameLoc(), | |||
2324 | OverloadCandidateSet::CSK_Normal); | |||
2325 | OverloadCandidateSet::iterator Best; | |||
2326 | for (NamedDecl *CD : Corrected) { | |||
2327 | if (FunctionTemplateDecl *FTD = | |||
2328 | dyn_cast<FunctionTemplateDecl>(CD)) | |||
2329 | AddTemplateOverloadCandidate( | |||
2330 | FTD, DeclAccessPair::make(FTD, AS_none), ExplicitTemplateArgs, | |||
2331 | Args, OCS); | |||
2332 | else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(CD)) | |||
2333 | if (!ExplicitTemplateArgs || ExplicitTemplateArgs->size() == 0) | |||
2334 | AddOverloadCandidate(FD, DeclAccessPair::make(FD, AS_none), | |||
2335 | Args, OCS); | |||
2336 | } | |||
2337 | switch (OCS.BestViableFunction(*this, R.getNameLoc(), Best)) { | |||
2338 | case OR_Success: | |||
2339 | ND = Best->FoundDecl; | |||
2340 | Corrected.setCorrectionDecl(ND); | |||
2341 | break; | |||
2342 | default: | |||
2343 | // FIXME: Arbitrarily pick the first declaration for the note. | |||
2344 | Corrected.setCorrectionDecl(ND); | |||
2345 | break; | |||
2346 | } | |||
2347 | } | |||
2348 | R.addDecl(ND); | |||
2349 | if (getLangOpts().CPlusPlus && ND->isCXXClassMember()) { | |||
2350 | CXXRecordDecl *Record = nullptr; | |||
2351 | if (Corrected.getCorrectionSpecifier()) { | |||
2352 | const Type *Ty = Corrected.getCorrectionSpecifier()->getAsType(); | |||
2353 | Record = Ty->getAsCXXRecordDecl(); | |||
2354 | } | |||
2355 | if (!Record) | |||
2356 | Record = cast<CXXRecordDecl>( | |||
2357 | ND->getDeclContext()->getRedeclContext()); | |||
2358 | R.setNamingClass(Record); | |||
2359 | } | |||
2360 | ||||
2361 | auto *UnderlyingND = ND->getUnderlyingDecl(); | |||
2362 | AcceptableWithRecovery = isa<ValueDecl>(UnderlyingND) || | |||
2363 | isa<FunctionTemplateDecl>(UnderlyingND); | |||
2364 | // FIXME: If we ended up with a typo for a type name or | |||
2365 | // Objective-C class name, we're in trouble because the parser | |||
2366 | // is in the wrong place to recover. Suggest the typo | |||
2367 | // correction, but don't make it a fix-it since we're not going | |||
2368 | // to recover well anyway. | |||
2369 | AcceptableWithoutRecovery = isa<TypeDecl>(UnderlyingND) || | |||
2370 | getAsTypeTemplateDecl(UnderlyingND) || | |||
2371 | isa<ObjCInterfaceDecl>(UnderlyingND); | |||
2372 | } else { | |||
2373 | // FIXME: We found a keyword. Suggest it, but don't provide a fix-it | |||
2374 | // because we aren't able to recover. | |||
2375 | AcceptableWithoutRecovery = true; | |||
2376 | } | |||
2377 | ||||
2378 | if (AcceptableWithRecovery || AcceptableWithoutRecovery) { | |||
2379 | unsigned NoteID = Corrected.getCorrectionDeclAs<ImplicitParamDecl>() | |||
2380 | ? diag::note_implicit_param_decl | |||
2381 | : diag::note_previous_decl; | |||
2382 | if (SS.isEmpty()) | |||
2383 | diagnoseTypo(Corrected, PDiag(diagnostic_suggest) << Name, | |||
2384 | PDiag(NoteID), AcceptableWithRecovery); | |||
2385 | else | |||
2386 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) | |||
2387 | << Name << computeDeclContext(SS, false) | |||
2388 | << DroppedSpecifier << SS.getRange(), | |||
2389 | PDiag(NoteID), AcceptableWithRecovery); | |||
2390 | ||||
2391 | // Tell the callee whether to try to recover. | |||
2392 | return !AcceptableWithRecovery; | |||
2393 | } | |||
2394 | } | |||
2395 | R.clear(); | |||
2396 | ||||
2397 | // Emit a special diagnostic for failed member lookups. | |||
2398 | // FIXME: computing the declaration context might fail here (?) | |||
2399 | if (!SS.isEmpty()) { | |||
2400 | Diag(R.getNameLoc(), diag::err_no_member) | |||
2401 | << Name << computeDeclContext(SS, false) | |||
2402 | << SS.getRange(); | |||
2403 | return true; | |||
2404 | } | |||
2405 | ||||
2406 | // Give up, we can't recover. | |||
2407 | Diag(R.getNameLoc(), diagnostic) << Name; | |||
2408 | return true; | |||
2409 | } | |||
2410 | ||||
2411 | /// In Microsoft mode, if we are inside a template class whose parent class has | |||
2412 | /// dependent base classes, and we can't resolve an unqualified identifier, then | |||
2413 | /// assume the identifier is a member of a dependent base class. We can only | |||
2414 | /// recover successfully in static methods, instance methods, and other contexts | |||
2415 | /// where 'this' is available. This doesn't precisely match MSVC's | |||
2416 | /// instantiation model, but it's close enough. | |||
2417 | static Expr * | |||
2418 | recoverFromMSUnqualifiedLookup(Sema &S, ASTContext &Context, | |||
2419 | DeclarationNameInfo &NameInfo, | |||
2420 | SourceLocation TemplateKWLoc, | |||
2421 | const TemplateArgumentListInfo *TemplateArgs) { | |||
2422 | // Only try to recover from lookup into dependent bases in static methods or | |||
2423 | // contexts where 'this' is available. | |||
2424 | QualType ThisType = S.getCurrentThisType(); | |||
2425 | const CXXRecordDecl *RD = nullptr; | |||
2426 | if (!ThisType.isNull()) | |||
2427 | RD = ThisType->getPointeeType()->getAsCXXRecordDecl(); | |||
2428 | else if (auto *MD = dyn_cast<CXXMethodDecl>(S.CurContext)) | |||
2429 | RD = MD->getParent(); | |||
2430 | if (!RD || !RD->hasAnyDependentBases()) | |||
2431 | return nullptr; | |||
2432 | ||||
2433 | // Diagnose this as unqualified lookup into a dependent base class. If 'this' | |||
2434 | // is available, suggest inserting 'this->' as a fixit. | |||
2435 | SourceLocation Loc = NameInfo.getLoc(); | |||
2436 | auto DB = S.Diag(Loc, diag::ext_undeclared_unqual_id_with_dependent_base); | |||
2437 | DB << NameInfo.getName() << RD; | |||
2438 | ||||
2439 | if (!ThisType.isNull()) { | |||
2440 | DB << FixItHint::CreateInsertion(Loc, "this->"); | |||
2441 | return CXXDependentScopeMemberExpr::Create( | |||
2442 | Context, /*This=*/nullptr, ThisType, /*IsArrow=*/true, | |||
2443 | /*Op=*/SourceLocation(), NestedNameSpecifierLoc(), TemplateKWLoc, | |||
2444 | /*FirstQualifierFoundInScope=*/nullptr, NameInfo, TemplateArgs); | |||
2445 | } | |||
2446 | ||||
2447 | // Synthesize a fake NNS that points to the derived class. This will | |||
2448 | // perform name lookup during template instantiation. | |||
2449 | CXXScopeSpec SS; | |||
2450 | auto *NNS = | |||
2451 | NestedNameSpecifier::Create(Context, nullptr, true, RD->getTypeForDecl()); | |||
2452 | SS.MakeTrivial(Context, NNS, SourceRange(Loc, Loc)); | |||
2453 | return DependentScopeDeclRefExpr::Create( | |||
2454 | Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo, | |||
2455 | TemplateArgs); | |||
2456 | } | |||
2457 | ||||
2458 | ExprResult | |||
2459 | Sema::ActOnIdExpression(Scope *S, CXXScopeSpec &SS, | |||
2460 | SourceLocation TemplateKWLoc, UnqualifiedId &Id, | |||
2461 | bool HasTrailingLParen, bool IsAddressOfOperand, | |||
2462 | CorrectionCandidateCallback *CCC, | |||
2463 | bool IsInlineAsmIdentifier, Token *KeywordReplacement) { | |||
2464 | assert(!(IsAddressOfOperand && HasTrailingLParen) &&(static_cast <bool> (!(IsAddressOfOperand && HasTrailingLParen ) && "cannot be direct & operand and have a trailing lparen" ) ? void (0) : __assert_fail ("!(IsAddressOfOperand && HasTrailingLParen) && \"cannot be direct & operand and have a trailing lparen\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2465, __extension__ __PRETTY_FUNCTION__)) | |||
2465 | "cannot be direct & operand and have a trailing lparen")(static_cast <bool> (!(IsAddressOfOperand && HasTrailingLParen ) && "cannot be direct & operand and have a trailing lparen" ) ? void (0) : __assert_fail ("!(IsAddressOfOperand && HasTrailingLParen) && \"cannot be direct & operand and have a trailing lparen\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2465, __extension__ __PRETTY_FUNCTION__)); | |||
2466 | if (SS.isInvalid()) | |||
2467 | return ExprError(); | |||
2468 | ||||
2469 | TemplateArgumentListInfo TemplateArgsBuffer; | |||
2470 | ||||
2471 | // Decompose the UnqualifiedId into the following data. | |||
2472 | DeclarationNameInfo NameInfo; | |||
2473 | const TemplateArgumentListInfo *TemplateArgs; | |||
2474 | DecomposeUnqualifiedId(Id, TemplateArgsBuffer, NameInfo, TemplateArgs); | |||
2475 | ||||
2476 | DeclarationName Name = NameInfo.getName(); | |||
2477 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | |||
2478 | SourceLocation NameLoc = NameInfo.getLoc(); | |||
2479 | ||||
2480 | if (II && II->isEditorPlaceholder()) { | |||
2481 | // FIXME: When typed placeholders are supported we can create a typed | |||
2482 | // placeholder expression node. | |||
2483 | return ExprError(); | |||
2484 | } | |||
2485 | ||||
2486 | // C++ [temp.dep.expr]p3: | |||
2487 | // An id-expression is type-dependent if it contains: | |||
2488 | // -- an identifier that was declared with a dependent type, | |||
2489 | // (note: handled after lookup) | |||
2490 | // -- a template-id that is dependent, | |||
2491 | // (note: handled in BuildTemplateIdExpr) | |||
2492 | // -- a conversion-function-id that specifies a dependent type, | |||
2493 | // -- a nested-name-specifier that contains a class-name that | |||
2494 | // names a dependent type. | |||
2495 | // Determine whether this is a member of an unknown specialization; | |||
2496 | // we need to handle these differently. | |||
2497 | bool DependentID = false; | |||
2498 | if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName && | |||
2499 | Name.getCXXNameType()->isDependentType()) { | |||
2500 | DependentID = true; | |||
2501 | } else if (SS.isSet()) { | |||
2502 | if (DeclContext *DC = computeDeclContext(SS, false)) { | |||
2503 | if (RequireCompleteDeclContext(SS, DC)) | |||
2504 | return ExprError(); | |||
2505 | } else { | |||
2506 | DependentID = true; | |||
2507 | } | |||
2508 | } | |||
2509 | ||||
2510 | if (DependentID) | |||
2511 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2512 | IsAddressOfOperand, TemplateArgs); | |||
2513 | ||||
2514 | // Perform the required lookup. | |||
2515 | LookupResult R(*this, NameInfo, | |||
2516 | (Id.getKind() == UnqualifiedIdKind::IK_ImplicitSelfParam) | |||
2517 | ? LookupObjCImplicitSelfParam | |||
2518 | : LookupOrdinaryName); | |||
2519 | if (TemplateKWLoc.isValid() || TemplateArgs) { | |||
2520 | // Lookup the template name again to correctly establish the context in | |||
2521 | // which it was found. This is really unfortunate as we already did the | |||
2522 | // lookup to determine that it was a template name in the first place. If | |||
2523 | // this becomes a performance hit, we can work harder to preserve those | |||
2524 | // results until we get here but it's likely not worth it. | |||
2525 | bool MemberOfUnknownSpecialization; | |||
2526 | AssumedTemplateKind AssumedTemplate; | |||
2527 | if (LookupTemplateName(R, S, SS, QualType(), /*EnteringContext=*/false, | |||
2528 | MemberOfUnknownSpecialization, TemplateKWLoc, | |||
2529 | &AssumedTemplate)) | |||
2530 | return ExprError(); | |||
2531 | ||||
2532 | if (MemberOfUnknownSpecialization || | |||
2533 | (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation)) | |||
2534 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2535 | IsAddressOfOperand, TemplateArgs); | |||
2536 | } else { | |||
2537 | bool IvarLookupFollowUp = II && !SS.isSet() && getCurMethodDecl(); | |||
2538 | LookupParsedName(R, S, &SS, !IvarLookupFollowUp); | |||
2539 | ||||
2540 | // If the result might be in a dependent base class, this is a dependent | |||
2541 | // id-expression. | |||
2542 | if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation) | |||
2543 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2544 | IsAddressOfOperand, TemplateArgs); | |||
2545 | ||||
2546 | // If this reference is in an Objective-C method, then we need to do | |||
2547 | // some special Objective-C lookup, too. | |||
2548 | if (IvarLookupFollowUp) { | |||
2549 | ExprResult E(LookupInObjCMethod(R, S, II, true)); | |||
2550 | if (E.isInvalid()) | |||
2551 | return ExprError(); | |||
2552 | ||||
2553 | if (Expr *Ex = E.getAs<Expr>()) | |||
2554 | return Ex; | |||
2555 | } | |||
2556 | } | |||
2557 | ||||
2558 | if (R.isAmbiguous()) | |||
2559 | return ExprError(); | |||
2560 | ||||
2561 | // This could be an implicitly declared function reference (legal in C90, | |||
2562 | // extension in C99, forbidden in C++). | |||
2563 | if (R.empty() && HasTrailingLParen && II && !getLangOpts().CPlusPlus) { | |||
2564 | NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *II, S); | |||
2565 | if (D) R.addDecl(D); | |||
2566 | } | |||
2567 | ||||
2568 | // Determine whether this name might be a candidate for | |||
2569 | // argument-dependent lookup. | |||
2570 | bool ADL = UseArgumentDependentLookup(SS, R, HasTrailingLParen); | |||
2571 | ||||
2572 | if (R.empty() && !ADL) { | |||
2573 | if (SS.isEmpty() && getLangOpts().MSVCCompat) { | |||
2574 | if (Expr *E = recoverFromMSUnqualifiedLookup(*this, Context, NameInfo, | |||
2575 | TemplateKWLoc, TemplateArgs)) | |||
2576 | return E; | |||
2577 | } | |||
2578 | ||||
2579 | // Don't diagnose an empty lookup for inline assembly. | |||
2580 | if (IsInlineAsmIdentifier) | |||
2581 | return ExprError(); | |||
2582 | ||||
2583 | // If this name wasn't predeclared and if this is not a function | |||
2584 | // call, diagnose the problem. | |||
2585 | TypoExpr *TE = nullptr; | |||
2586 | DefaultFilterCCC DefaultValidator(II, SS.isValid() ? SS.getScopeRep() | |||
2587 | : nullptr); | |||
2588 | DefaultValidator.IsAddressOfOperand = IsAddressOfOperand; | |||
2589 | assert((!CCC || CCC->IsAddressOfOperand == IsAddressOfOperand) &&(static_cast <bool> ((!CCC || CCC->IsAddressOfOperand == IsAddressOfOperand) && "Typo correction callback misconfigured" ) ? void (0) : __assert_fail ("(!CCC || CCC->IsAddressOfOperand == IsAddressOfOperand) && \"Typo correction callback misconfigured\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2590, __extension__ __PRETTY_FUNCTION__)) | |||
2590 | "Typo correction callback misconfigured")(static_cast <bool> ((!CCC || CCC->IsAddressOfOperand == IsAddressOfOperand) && "Typo correction callback misconfigured" ) ? void (0) : __assert_fail ("(!CCC || CCC->IsAddressOfOperand == IsAddressOfOperand) && \"Typo correction callback misconfigured\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2590, __extension__ __PRETTY_FUNCTION__)); | |||
2591 | if (CCC) { | |||
2592 | // Make sure the callback knows what the typo being diagnosed is. | |||
2593 | CCC->setTypoName(II); | |||
2594 | if (SS.isValid()) | |||
2595 | CCC->setTypoNNS(SS.getScopeRep()); | |||
2596 | } | |||
2597 | // FIXME: DiagnoseEmptyLookup produces bad diagnostics if we're looking for | |||
2598 | // a template name, but we happen to have always already looked up the name | |||
2599 | // before we get here if it must be a template name. | |||
2600 | if (DiagnoseEmptyLookup(S, SS, R, CCC ? *CCC : DefaultValidator, nullptr, | |||
2601 | None, &TE)) { | |||
2602 | if (TE && KeywordReplacement) { | |||
2603 | auto &State = getTypoExprState(TE); | |||
2604 | auto BestTC = State.Consumer->getNextCorrection(); | |||
2605 | if (BestTC.isKeyword()) { | |||
2606 | auto *II = BestTC.getCorrectionAsIdentifierInfo(); | |||
2607 | if (State.DiagHandler) | |||
2608 | State.DiagHandler(BestTC); | |||
2609 | KeywordReplacement->startToken(); | |||
2610 | KeywordReplacement->setKind(II->getTokenID()); | |||
2611 | KeywordReplacement->setIdentifierInfo(II); | |||
2612 | KeywordReplacement->setLocation(BestTC.getCorrectionRange().getBegin()); | |||
2613 | // Clean up the state associated with the TypoExpr, since it has | |||
2614 | // now been diagnosed (without a call to CorrectDelayedTyposInExpr). | |||
2615 | clearDelayedTypo(TE); | |||
2616 | // Signal that a correction to a keyword was performed by returning a | |||
2617 | // valid-but-null ExprResult. | |||
2618 | return (Expr*)nullptr; | |||
2619 | } | |||
2620 | State.Consumer->resetCorrectionStream(); | |||
2621 | } | |||
2622 | return TE ? TE : ExprError(); | |||
2623 | } | |||
2624 | ||||
2625 | assert(!R.empty() &&(static_cast <bool> (!R.empty() && "DiagnoseEmptyLookup returned false but added no results" ) ? void (0) : __assert_fail ("!R.empty() && \"DiagnoseEmptyLookup returned false but added no results\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2626, __extension__ __PRETTY_FUNCTION__)) | |||
2626 | "DiagnoseEmptyLookup returned false but added no results")(static_cast <bool> (!R.empty() && "DiagnoseEmptyLookup returned false but added no results" ) ? void (0) : __assert_fail ("!R.empty() && \"DiagnoseEmptyLookup returned false but added no results\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2626, __extension__ __PRETTY_FUNCTION__)); | |||
2627 | ||||
2628 | // If we found an Objective-C instance variable, let | |||
2629 | // LookupInObjCMethod build the appropriate expression to | |||
2630 | // reference the ivar. | |||
2631 | if (ObjCIvarDecl *Ivar = R.getAsSingle<ObjCIvarDecl>()) { | |||
2632 | R.clear(); | |||
2633 | ExprResult E(LookupInObjCMethod(R, S, Ivar->getIdentifier())); | |||
2634 | // In a hopelessly buggy code, Objective-C instance variable | |||
2635 | // lookup fails and no expression will be built to reference it. | |||
2636 | if (!E.isInvalid() && !E.get()) | |||
2637 | return ExprError(); | |||
2638 | return E; | |||
2639 | } | |||
2640 | } | |||
2641 | ||||
2642 | // This is guaranteed from this point on. | |||
2643 | assert(!R.empty() || ADL)(static_cast <bool> (!R.empty() || ADL) ? void (0) : __assert_fail ("!R.empty() || ADL", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2643, __extension__ __PRETTY_FUNCTION__)); | |||
2644 | ||||
2645 | // Check whether this might be a C++ implicit instance member access. | |||
2646 | // C++ [class.mfct.non-static]p3: | |||
2647 | // When an id-expression that is not part of a class member access | |||
2648 | // syntax and not used to form a pointer to member is used in the | |||
2649 | // body of a non-static member function of class X, if name lookup | |||
2650 | // resolves the name in the id-expression to a non-static non-type | |||
2651 | // member of some class C, the id-expression is transformed into a | |||
2652 | // class member access expression using (*this) as the | |||
2653 | // postfix-expression to the left of the . operator. | |||
2654 | // | |||
2655 | // But we don't actually need to do this for '&' operands if R | |||
2656 | // resolved to a function or overloaded function set, because the | |||
2657 | // expression is ill-formed if it actually works out to be a | |||
2658 | // non-static member function: | |||
2659 | // | |||
2660 | // C++ [expr.ref]p4: | |||
2661 | // Otherwise, if E1.E2 refers to a non-static member function. . . | |||
2662 | // [t]he expression can be used only as the left-hand operand of a | |||
2663 | // member function call. | |||
2664 | // | |||
2665 | // There are other safeguards against such uses, but it's important | |||
2666 | // to get this right here so that we don't end up making a | |||
2667 | // spuriously dependent expression if we're inside a dependent | |||
2668 | // instance method. | |||
2669 | if (!R.empty() && (*R.begin())->isCXXClassMember()) { | |||
2670 | bool MightBeImplicitMember; | |||
2671 | if (!IsAddressOfOperand) | |||
2672 | MightBeImplicitMember = true; | |||
2673 | else if (!SS.isEmpty()) | |||
2674 | MightBeImplicitMember = false; | |||
2675 | else if (R.isOverloadedResult()) | |||
2676 | MightBeImplicitMember = false; | |||
2677 | else if (R.isUnresolvableResult()) | |||
2678 | MightBeImplicitMember = true; | |||
2679 | else | |||
2680 | MightBeImplicitMember = isa<FieldDecl>(R.getFoundDecl()) || | |||
2681 | isa<IndirectFieldDecl>(R.getFoundDecl()) || | |||
2682 | isa<MSPropertyDecl>(R.getFoundDecl()); | |||
2683 | ||||
2684 | if (MightBeImplicitMember) | |||
2685 | return BuildPossibleImplicitMemberExpr(SS, TemplateKWLoc, | |||
2686 | R, TemplateArgs, S); | |||
2687 | } | |||
2688 | ||||
2689 | if (TemplateArgs || TemplateKWLoc.isValid()) { | |||
2690 | ||||
2691 | // In C++1y, if this is a variable template id, then check it | |||
2692 | // in BuildTemplateIdExpr(). | |||
2693 | // The single lookup result must be a variable template declaration. | |||
2694 | if (Id.getKind() == UnqualifiedIdKind::IK_TemplateId && Id.TemplateId && | |||
2695 | Id.TemplateId->Kind == TNK_Var_template) { | |||
2696 | assert(R.getAsSingle<VarTemplateDecl>() &&(static_cast <bool> (R.getAsSingle<VarTemplateDecl> () && "There should only be one declaration found.") ? void (0) : __assert_fail ("R.getAsSingle<VarTemplateDecl>() && \"There should only be one declaration found.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2697, __extension__ __PRETTY_FUNCTION__)) | |||
2697 | "There should only be one declaration found.")(static_cast <bool> (R.getAsSingle<VarTemplateDecl> () && "There should only be one declaration found.") ? void (0) : __assert_fail ("R.getAsSingle<VarTemplateDecl>() && \"There should only be one declaration found.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2697, __extension__ __PRETTY_FUNCTION__)); | |||
2698 | } | |||
2699 | ||||
2700 | return BuildTemplateIdExpr(SS, TemplateKWLoc, R, ADL, TemplateArgs); | |||
2701 | } | |||
2702 | ||||
2703 | return BuildDeclarationNameExpr(SS, R, ADL); | |||
2704 | } | |||
2705 | ||||
2706 | /// BuildQualifiedDeclarationNameExpr - Build a C++ qualified | |||
2707 | /// declaration name, generally during template instantiation. | |||
2708 | /// There's a large number of things which don't need to be done along | |||
2709 | /// this path. | |||
2710 | ExprResult Sema::BuildQualifiedDeclarationNameExpr( | |||
2711 | CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, | |||
2712 | bool IsAddressOfOperand, const Scope *S, TypeSourceInfo **RecoveryTSI) { | |||
2713 | DeclContext *DC = computeDeclContext(SS, false); | |||
2714 | if (!DC) | |||
2715 | return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(), | |||
2716 | NameInfo, /*TemplateArgs=*/nullptr); | |||
2717 | ||||
2718 | if (RequireCompleteDeclContext(SS, DC)) | |||
2719 | return ExprError(); | |||
2720 | ||||
2721 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | |||
2722 | LookupQualifiedName(R, DC); | |||
2723 | ||||
2724 | if (R.isAmbiguous()) | |||
2725 | return ExprError(); | |||
2726 | ||||
2727 | if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation) | |||
2728 | return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(), | |||
2729 | NameInfo, /*TemplateArgs=*/nullptr); | |||
2730 | ||||
2731 | if (R.empty()) { | |||
2732 | // Don't diagnose problems with invalid record decl, the secondary no_member | |||
2733 | // diagnostic during template instantiation is likely bogus, e.g. if a class | |||
2734 | // is invalid because it's derived from an invalid base class, then missing | |||
2735 | // members were likely supposed to be inherited. | |||
2736 | if (const auto *CD = dyn_cast<CXXRecordDecl>(DC)) | |||
2737 | if (CD->isInvalidDecl()) | |||
2738 | return ExprError(); | |||
2739 | Diag(NameInfo.getLoc(), diag::err_no_member) | |||
2740 | << NameInfo.getName() << DC << SS.getRange(); | |||
2741 | return ExprError(); | |||
2742 | } | |||
2743 | ||||
2744 | if (const TypeDecl *TD = R.getAsSingle<TypeDecl>()) { | |||
2745 | // Diagnose a missing typename if this resolved unambiguously to a type in | |||
2746 | // a dependent context. If we can recover with a type, downgrade this to | |||
2747 | // a warning in Microsoft compatibility mode. | |||
2748 | unsigned DiagID = diag::err_typename_missing; | |||
2749 | if (RecoveryTSI && getLangOpts().MSVCCompat) | |||
2750 | DiagID = diag::ext_typename_missing; | |||
2751 | SourceLocation Loc = SS.getBeginLoc(); | |||
2752 | auto D = Diag(Loc, DiagID); | |||
2753 | D << SS.getScopeRep() << NameInfo.getName().getAsString() | |||
2754 | << SourceRange(Loc, NameInfo.getEndLoc()); | |||
2755 | ||||
2756 | // Don't recover if the caller isn't expecting us to or if we're in a SFINAE | |||
2757 | // context. | |||
2758 | if (!RecoveryTSI) | |||
2759 | return ExprError(); | |||
2760 | ||||
2761 | // Only issue the fixit if we're prepared to recover. | |||
2762 | D << FixItHint::CreateInsertion(Loc, "typename "); | |||
2763 | ||||
2764 | // Recover by pretending this was an elaborated type. | |||
2765 | QualType Ty = Context.getTypeDeclType(TD); | |||
2766 | TypeLocBuilder TLB; | |||
2767 | TLB.pushTypeSpec(Ty).setNameLoc(NameInfo.getLoc()); | |||
2768 | ||||
2769 | QualType ET = getElaboratedType(ETK_None, SS, Ty); | |||
2770 | ElaboratedTypeLoc QTL = TLB.push<ElaboratedTypeLoc>(ET); | |||
2771 | QTL.setElaboratedKeywordLoc(SourceLocation()); | |||
2772 | QTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
2773 | ||||
2774 | *RecoveryTSI = TLB.getTypeSourceInfo(Context, ET); | |||
2775 | ||||
2776 | return ExprEmpty(); | |||
2777 | } | |||
2778 | ||||
2779 | // Defend against this resolving to an implicit member access. We usually | |||
2780 | // won't get here if this might be a legitimate a class member (we end up in | |||
2781 | // BuildMemberReferenceExpr instead), but this can be valid if we're forming | |||
2782 | // a pointer-to-member or in an unevaluated context in C++11. | |||
2783 | if (!R.empty() && (*R.begin())->isCXXClassMember() && !IsAddressOfOperand) | |||
2784 | return BuildPossibleImplicitMemberExpr(SS, | |||
2785 | /*TemplateKWLoc=*/SourceLocation(), | |||
2786 | R, /*TemplateArgs=*/nullptr, S); | |||
2787 | ||||
2788 | return BuildDeclarationNameExpr(SS, R, /* ADL */ false); | |||
2789 | } | |||
2790 | ||||
2791 | /// The parser has read a name in, and Sema has detected that we're currently | |||
2792 | /// inside an ObjC method. Perform some additional checks and determine if we | |||
2793 | /// should form a reference to an ivar. | |||
2794 | /// | |||
2795 | /// Ideally, most of this would be done by lookup, but there's | |||
2796 | /// actually quite a lot of extra work involved. | |||
2797 | DeclResult Sema::LookupIvarInObjCMethod(LookupResult &Lookup, Scope *S, | |||
2798 | IdentifierInfo *II) { | |||
2799 | SourceLocation Loc = Lookup.getNameLoc(); | |||
2800 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | |||
2801 | ||||
2802 | // Check for error condition which is already reported. | |||
2803 | if (!CurMethod) | |||
2804 | return DeclResult(true); | |||
2805 | ||||
2806 | // There are two cases to handle here. 1) scoped lookup could have failed, | |||
2807 | // in which case we should look for an ivar. 2) scoped lookup could have | |||
2808 | // found a decl, but that decl is outside the current instance method (i.e. | |||
2809 | // a global variable). In these two cases, we do a lookup for an ivar with | |||
2810 | // this name, if the lookup sucedes, we replace it our current decl. | |||
2811 | ||||
2812 | // If we're in a class method, we don't normally want to look for | |||
2813 | // ivars. But if we don't find anything else, and there's an | |||
2814 | // ivar, that's an error. | |||
2815 | bool IsClassMethod = CurMethod->isClassMethod(); | |||
2816 | ||||
2817 | bool LookForIvars; | |||
2818 | if (Lookup.empty()) | |||
2819 | LookForIvars = true; | |||
2820 | else if (IsClassMethod) | |||
2821 | LookForIvars = false; | |||
2822 | else | |||
2823 | LookForIvars = (Lookup.isSingleResult() && | |||
2824 | Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod()); | |||
2825 | ObjCInterfaceDecl *IFace = nullptr; | |||
2826 | if (LookForIvars) { | |||
2827 | IFace = CurMethod->getClassInterface(); | |||
2828 | ObjCInterfaceDecl *ClassDeclared; | |||
2829 | ObjCIvarDecl *IV = nullptr; | |||
2830 | if (IFace && (IV = IFace->lookupInstanceVariable(II, ClassDeclared))) { | |||
2831 | // Diagnose using an ivar in a class method. | |||
2832 | if (IsClassMethod) { | |||
2833 | Diag(Loc, diag::err_ivar_use_in_class_method) << IV->getDeclName(); | |||
2834 | return DeclResult(true); | |||
2835 | } | |||
2836 | ||||
2837 | // Diagnose the use of an ivar outside of the declaring class. | |||
2838 | if (IV->getAccessControl() == ObjCIvarDecl::Private && | |||
2839 | !declaresSameEntity(ClassDeclared, IFace) && | |||
2840 | !getLangOpts().DebuggerSupport) | |||
2841 | Diag(Loc, diag::err_private_ivar_access) << IV->getDeclName(); | |||
2842 | ||||
2843 | // Success. | |||
2844 | return IV; | |||
2845 | } | |||
2846 | } else if (CurMethod->isInstanceMethod()) { | |||
2847 | // We should warn if a local variable hides an ivar. | |||
2848 | if (ObjCInterfaceDecl *IFace = CurMethod->getClassInterface()) { | |||
2849 | ObjCInterfaceDecl *ClassDeclared; | |||
2850 | if (ObjCIvarDecl *IV = IFace->lookupInstanceVariable(II, ClassDeclared)) { | |||
2851 | if (IV->getAccessControl() != ObjCIvarDecl::Private || | |||
2852 | declaresSameEntity(IFace, ClassDeclared)) | |||
2853 | Diag(Loc, diag::warn_ivar_use_hidden) << IV->getDeclName(); | |||
2854 | } | |||
2855 | } | |||
2856 | } else if (Lookup.isSingleResult() && | |||
2857 | Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod()) { | |||
2858 | // If accessing a stand-alone ivar in a class method, this is an error. | |||
2859 | if (const ObjCIvarDecl *IV = | |||
2860 | dyn_cast<ObjCIvarDecl>(Lookup.getFoundDecl())) { | |||
2861 | Diag(Loc, diag::err_ivar_use_in_class_method) << IV->getDeclName(); | |||
2862 | return DeclResult(true); | |||
2863 | } | |||
2864 | } | |||
2865 | ||||
2866 | // Didn't encounter an error, didn't find an ivar. | |||
2867 | return DeclResult(false); | |||
2868 | } | |||
2869 | ||||
2870 | ExprResult Sema::BuildIvarRefExpr(Scope *S, SourceLocation Loc, | |||
2871 | ObjCIvarDecl *IV) { | |||
2872 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | |||
2873 | assert(CurMethod && CurMethod->isInstanceMethod() &&(static_cast <bool> (CurMethod && CurMethod-> isInstanceMethod() && "should not reference ivar from this context" ) ? void (0) : __assert_fail ("CurMethod && CurMethod->isInstanceMethod() && \"should not reference ivar from this context\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2874, __extension__ __PRETTY_FUNCTION__)) | |||
2874 | "should not reference ivar from this context")(static_cast <bool> (CurMethod && CurMethod-> isInstanceMethod() && "should not reference ivar from this context" ) ? void (0) : __assert_fail ("CurMethod && CurMethod->isInstanceMethod() && \"should not reference ivar from this context\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2874, __extension__ __PRETTY_FUNCTION__)); | |||
2875 | ||||
2876 | ObjCInterfaceDecl *IFace = CurMethod->getClassInterface(); | |||
2877 | assert(IFace && "should not reference ivar from this context")(static_cast <bool> (IFace && "should not reference ivar from this context" ) ? void (0) : __assert_fail ("IFace && \"should not reference ivar from this context\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 2877, __extension__ __PRETTY_FUNCTION__)); | |||
2878 | ||||
2879 | // If we're referencing an invalid decl, just return this as a silent | |||
2880 | // error node. The error diagnostic was already emitted on the decl. | |||
2881 | if (IV->isInvalidDecl()) | |||
2882 | return ExprError(); | |||
2883 | ||||
2884 | // Check if referencing a field with __attribute__((deprecated)). | |||
2885 | if (DiagnoseUseOfDecl(IV, Loc)) | |||
2886 | return ExprError(); | |||
2887 | ||||
2888 | // FIXME: This should use a new expr for a direct reference, don't | |||
2889 | // turn this into Self->ivar, just return a BareIVarExpr or something. | |||
2890 | IdentifierInfo &II = Context.Idents.get("self"); | |||
2891 | UnqualifiedId SelfName; | |||
2892 | SelfName.setImplicitSelfParam(&II); | |||
2893 | CXXScopeSpec SelfScopeSpec; | |||
2894 | SourceLocation TemplateKWLoc; | |||
2895 | ExprResult SelfExpr = | |||
2896 | ActOnIdExpression(S, SelfScopeSpec, TemplateKWLoc, SelfName, | |||
2897 | /*HasTrailingLParen=*/false, | |||
2898 | /*IsAddressOfOperand=*/false); | |||
2899 | if (SelfExpr.isInvalid()) | |||
2900 | return ExprError(); | |||
2901 | ||||
2902 | SelfExpr = DefaultLvalueConversion(SelfExpr.get()); | |||
2903 | if (SelfExpr.isInvalid()) | |||
2904 | return ExprError(); | |||
2905 | ||||
2906 | MarkAnyDeclReferenced(Loc, IV, true); | |||
2907 | ||||
2908 | ObjCMethodFamily MF = CurMethod->getMethodFamily(); | |||
2909 | if (MF != OMF_init && MF != OMF_dealloc && MF != OMF_finalize && | |||
2910 | !IvarBacksCurrentMethodAccessor(IFace, CurMethod, IV)) | |||
2911 | Diag(Loc, diag::warn_direct_ivar_access) << IV->getDeclName(); | |||
2912 | ||||
2913 | ObjCIvarRefExpr *Result = new (Context) | |||
2914 | ObjCIvarRefExpr(IV, IV->getUsageType(SelfExpr.get()->getType()), Loc, | |||
2915 | IV->getLocation(), SelfExpr.get(), true, true); | |||
2916 | ||||
2917 | if (IV->getType().getObjCLifetime() == Qualifiers::OCL_Weak) { | |||
2918 | if (!isUnevaluatedContext() && | |||
2919 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, Loc)) | |||
2920 | getCurFunction()->recordUseOfWeak(Result); | |||
2921 | } | |||
2922 | if (getLangOpts().ObjCAutoRefCount) | |||
2923 | if (const BlockDecl *BD = CurContext->getInnermostBlockDecl()) | |||
2924 | ImplicitlyRetainedSelfLocs.push_back({Loc, BD}); | |||
2925 | ||||
2926 | return Result; | |||
2927 | } | |||
2928 | ||||
2929 | /// The parser has read a name in, and Sema has detected that we're currently | |||
2930 | /// inside an ObjC method. Perform some additional checks and determine if we | |||
2931 | /// should form a reference to an ivar. If so, build an expression referencing | |||
2932 | /// that ivar. | |||
2933 | ExprResult | |||
2934 | Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S, | |||
2935 | IdentifierInfo *II, bool AllowBuiltinCreation) { | |||
2936 | // FIXME: Integrate this lookup step into LookupParsedName. | |||
2937 | DeclResult Ivar = LookupIvarInObjCMethod(Lookup, S, II); | |||
2938 | if (Ivar.isInvalid()) | |||
2939 | return ExprError(); | |||
2940 | if (Ivar.isUsable()) | |||
2941 | return BuildIvarRefExpr(S, Lookup.getNameLoc(), | |||
2942 | cast<ObjCIvarDecl>(Ivar.get())); | |||
2943 | ||||
2944 | if (Lookup.empty() && II && AllowBuiltinCreation) | |||
2945 | LookupBuiltin(Lookup); | |||
2946 | ||||
2947 | // Sentinel value saying that we didn't do anything special. | |||
2948 | return ExprResult(false); | |||
2949 | } | |||
2950 | ||||
2951 | /// Cast a base object to a member's actual type. | |||
2952 | /// | |||
2953 | /// There are two relevant checks: | |||
2954 | /// | |||
2955 | /// C++ [class.access.base]p7: | |||
2956 | /// | |||
2957 | /// If a class member access operator [...] is used to access a non-static | |||
2958 | /// data member or non-static member function, the reference is ill-formed if | |||
2959 | /// the left operand [...] cannot be implicitly converted to a pointer to the | |||
2960 | /// naming class of the right operand. | |||
2961 | /// | |||
2962 | /// C++ [expr.ref]p7: | |||
2963 | /// | |||
2964 | /// If E2 is a non-static data member or a non-static member function, the | |||
2965 | /// program is ill-formed if the class of which E2 is directly a member is an | |||
2966 | /// ambiguous base (11.8) of the naming class (11.9.3) of E2. | |||
2967 | /// | |||
2968 | /// Note that the latter check does not consider access; the access of the | |||
2969 | /// "real" base class is checked as appropriate when checking the access of the | |||
2970 | /// member name. | |||
2971 | ExprResult | |||
2972 | Sema::PerformObjectMemberConversion(Expr *From, | |||
2973 | NestedNameSpecifier *Qualifier, | |||
2974 | NamedDecl *FoundDecl, | |||
2975 | NamedDecl *Member) { | |||
2976 | CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Member->getDeclContext()); | |||
2977 | if (!RD) | |||
2978 | return From; | |||
2979 | ||||
2980 | QualType DestRecordType; | |||
2981 | QualType DestType; | |||
2982 | QualType FromRecordType; | |||
2983 | QualType FromType = From->getType(); | |||
2984 | bool PointerConversions = false; | |||
2985 | if (isa<FieldDecl>(Member)) { | |||
2986 | DestRecordType = Context.getCanonicalType(Context.getTypeDeclType(RD)); | |||
2987 | auto FromPtrType = FromType->getAs<PointerType>(); | |||
2988 | DestRecordType = Context.getAddrSpaceQualType( | |||
2989 | DestRecordType, FromPtrType | |||
2990 | ? FromType->getPointeeType().getAddressSpace() | |||
2991 | : FromType.getAddressSpace()); | |||
2992 | ||||
2993 | if (FromPtrType) { | |||
2994 | DestType = Context.getPointerType(DestRecordType); | |||
2995 | FromRecordType = FromPtrType->getPointeeType(); | |||
2996 | PointerConversions = true; | |||
2997 | } else { | |||
2998 | DestType = DestRecordType; | |||
2999 | FromRecordType = FromType; | |||
3000 | } | |||
3001 | } else if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Member)) { | |||
3002 | if (Method->isStatic()) | |||
3003 | return From; | |||
3004 | ||||
3005 | DestType = Method->getThisType(); | |||
3006 | DestRecordType = DestType->getPointeeType(); | |||
3007 | ||||
3008 | if (FromType->getAs<PointerType>()) { | |||
3009 | FromRecordType = FromType->getPointeeType(); | |||
3010 | PointerConversions = true; | |||
3011 | } else { | |||
3012 | FromRecordType = FromType; | |||
3013 | DestType = DestRecordType; | |||
3014 | } | |||
3015 | ||||
3016 | LangAS FromAS = FromRecordType.getAddressSpace(); | |||
3017 | LangAS DestAS = DestRecordType.getAddressSpace(); | |||
3018 | if (FromAS != DestAS) { | |||
3019 | QualType FromRecordTypeWithoutAS = | |||
3020 | Context.removeAddrSpaceQualType(FromRecordType); | |||
3021 | QualType FromTypeWithDestAS = | |||
3022 | Context.getAddrSpaceQualType(FromRecordTypeWithoutAS, DestAS); | |||
3023 | if (PointerConversions) | |||
3024 | FromTypeWithDestAS = Context.getPointerType(FromTypeWithDestAS); | |||
3025 | From = ImpCastExprToType(From, FromTypeWithDestAS, | |||
3026 | CK_AddressSpaceConversion, From->getValueKind()) | |||
3027 | .get(); | |||
3028 | } | |||
3029 | } else { | |||
3030 | // No conversion necessary. | |||
3031 | return From; | |||
3032 | } | |||
3033 | ||||
3034 | if (DestType->isDependentType() || FromType->isDependentType()) | |||
3035 | return From; | |||
3036 | ||||
3037 | // If the unqualified types are the same, no conversion is necessary. | |||
3038 | if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType)) | |||
3039 | return From; | |||
3040 | ||||
3041 | SourceRange FromRange = From->getSourceRange(); | |||
3042 | SourceLocation FromLoc = FromRange.getBegin(); | |||
3043 | ||||
3044 | ExprValueKind VK = From->getValueKind(); | |||
3045 | ||||
3046 | // C++ [class.member.lookup]p8: | |||
3047 | // [...] Ambiguities can often be resolved by qualifying a name with its | |||
3048 | // class name. | |||
3049 | // | |||
3050 | // If the member was a qualified name and the qualified referred to a | |||
3051 | // specific base subobject type, we'll cast to that intermediate type | |||
3052 | // first and then to the object in which the member is declared. That allows | |||
3053 | // one to resolve ambiguities in, e.g., a diamond-shaped hierarchy such as: | |||
3054 | // | |||
3055 | // class Base { public: int x; }; | |||
3056 | // class Derived1 : public Base { }; | |||
3057 | // class Derived2 : public Base { }; | |||
3058 | // class VeryDerived : public Derived1, public Derived2 { void f(); }; | |||
3059 | // | |||
3060 | // void VeryDerived::f() { | |||
3061 | // x = 17; // error: ambiguous base subobjects | |||
3062 | // Derived1::x = 17; // okay, pick the Base subobject of Derived1 | |||
3063 | // } | |||
3064 | if (Qualifier && Qualifier->getAsType()) { | |||
3065 | QualType QType = QualType(Qualifier->getAsType(), 0); | |||
3066 | assert(QType->isRecordType() && "lookup done with non-record type")(static_cast <bool> (QType->isRecordType() && "lookup done with non-record type") ? void (0) : __assert_fail ("QType->isRecordType() && \"lookup done with non-record type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3066, __extension__ __PRETTY_FUNCTION__)); | |||
3067 | ||||
3068 | QualType QRecordType = QualType(QType->getAs<RecordType>(), 0); | |||
3069 | ||||
3070 | // In C++98, the qualifier type doesn't actually have to be a base | |||
3071 | // type of the object type, in which case we just ignore it. | |||
3072 | // Otherwise build the appropriate casts. | |||
3073 | if (IsDerivedFrom(FromLoc, FromRecordType, QRecordType)) { | |||
3074 | CXXCastPath BasePath; | |||
3075 | if (CheckDerivedToBaseConversion(FromRecordType, QRecordType, | |||
3076 | FromLoc, FromRange, &BasePath)) | |||
3077 | return ExprError(); | |||
3078 | ||||
3079 | if (PointerConversions) | |||
3080 | QType = Context.getPointerType(QType); | |||
3081 | From = ImpCastExprToType(From, QType, CK_UncheckedDerivedToBase, | |||
3082 | VK, &BasePath).get(); | |||
3083 | ||||
3084 | FromType = QType; | |||
3085 | FromRecordType = QRecordType; | |||
3086 | ||||
3087 | // If the qualifier type was the same as the destination type, | |||
3088 | // we're done. | |||
3089 | if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType)) | |||
3090 | return From; | |||
3091 | } | |||
3092 | } | |||
3093 | ||||
3094 | CXXCastPath BasePath; | |||
3095 | if (CheckDerivedToBaseConversion(FromRecordType, DestRecordType, | |||
3096 | FromLoc, FromRange, &BasePath, | |||
3097 | /*IgnoreAccess=*/true)) | |||
3098 | return ExprError(); | |||
3099 | ||||
3100 | return ImpCastExprToType(From, DestType, CK_UncheckedDerivedToBase, | |||
3101 | VK, &BasePath); | |||
3102 | } | |||
3103 | ||||
3104 | bool Sema::UseArgumentDependentLookup(const CXXScopeSpec &SS, | |||
3105 | const LookupResult &R, | |||
3106 | bool HasTrailingLParen) { | |||
3107 | // Only when used directly as the postfix-expression of a call. | |||
3108 | if (!HasTrailingLParen) | |||
3109 | return false; | |||
3110 | ||||
3111 | // Never if a scope specifier was provided. | |||
3112 | if (SS.isSet()) | |||
3113 | return false; | |||
3114 | ||||
3115 | // Only in C++ or ObjC++. | |||
3116 | if (!getLangOpts().CPlusPlus) | |||
3117 | return false; | |||
3118 | ||||
3119 | // Turn off ADL when we find certain kinds of declarations during | |||
3120 | // normal lookup: | |||
3121 | for (NamedDecl *D : R) { | |||
3122 | // C++0x [basic.lookup.argdep]p3: | |||
3123 | // -- a declaration of a class member | |||
3124 | // Since using decls preserve this property, we check this on the | |||
3125 | // original decl. | |||
3126 | if (D->isCXXClassMember()) | |||
3127 | return false; | |||
3128 | ||||
3129 | // C++0x [basic.lookup.argdep]p3: | |||
3130 | // -- a block-scope function declaration that is not a | |||
3131 | // using-declaration | |||
3132 | // NOTE: we also trigger this for function templates (in fact, we | |||
3133 | // don't check the decl type at all, since all other decl types | |||
3134 | // turn off ADL anyway). | |||
3135 | if (isa<UsingShadowDecl>(D)) | |||
3136 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | |||
3137 | else if (D->getLexicalDeclContext()->isFunctionOrMethod()) | |||
3138 | return false; | |||
3139 | ||||
3140 | // C++0x [basic.lookup.argdep]p3: | |||
3141 | // -- a declaration that is neither a function or a function | |||
3142 | // template | |||
3143 | // And also for builtin functions. | |||
3144 | if (isa<FunctionDecl>(D)) { | |||
3145 | FunctionDecl *FDecl = cast<FunctionDecl>(D); | |||
3146 | ||||
3147 | // But also builtin functions. | |||
3148 | if (FDecl->getBuiltinID() && FDecl->isImplicit()) | |||
3149 | return false; | |||
3150 | } else if (!isa<FunctionTemplateDecl>(D)) | |||
3151 | return false; | |||
3152 | } | |||
3153 | ||||
3154 | return true; | |||
3155 | } | |||
3156 | ||||
3157 | ||||
3158 | /// Diagnoses obvious problems with the use of the given declaration | |||
3159 | /// as an expression. This is only actually called for lookups that | |||
3160 | /// were not overloaded, and it doesn't promise that the declaration | |||
3161 | /// will in fact be used. | |||
3162 | static bool CheckDeclInExpr(Sema &S, SourceLocation Loc, NamedDecl *D) { | |||
3163 | if (D->isInvalidDecl()) | |||
3164 | return true; | |||
3165 | ||||
3166 | if (isa<TypedefNameDecl>(D)) { | |||
3167 | S.Diag(Loc, diag::err_unexpected_typedef) << D->getDeclName(); | |||
3168 | return true; | |||
3169 | } | |||
3170 | ||||
3171 | if (isa<ObjCInterfaceDecl>(D)) { | |||
3172 | S.Diag(Loc, diag::err_unexpected_interface) << D->getDeclName(); | |||
3173 | return true; | |||
3174 | } | |||
3175 | ||||
3176 | if (isa<NamespaceDecl>(D)) { | |||
3177 | S.Diag(Loc, diag::err_unexpected_namespace) << D->getDeclName(); | |||
3178 | return true; | |||
3179 | } | |||
3180 | ||||
3181 | return false; | |||
3182 | } | |||
3183 | ||||
3184 | // Certain multiversion types should be treated as overloaded even when there is | |||
3185 | // only one result. | |||
3186 | static bool ShouldLookupResultBeMultiVersionOverload(const LookupResult &R) { | |||
3187 | assert(R.isSingleResult() && "Expected only a single result")(static_cast <bool> (R.isSingleResult() && "Expected only a single result" ) ? void (0) : __assert_fail ("R.isSingleResult() && \"Expected only a single result\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3187, __extension__ __PRETTY_FUNCTION__)); | |||
3188 | const auto *FD = dyn_cast<FunctionDecl>(R.getFoundDecl()); | |||
3189 | return FD && | |||
3190 | (FD->isCPUDispatchMultiVersion() || FD->isCPUSpecificMultiVersion()); | |||
3191 | } | |||
3192 | ||||
3193 | ExprResult Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS, | |||
3194 | LookupResult &R, bool NeedsADL, | |||
3195 | bool AcceptInvalidDecl) { | |||
3196 | // If this is a single, fully-resolved result and we don't need ADL, | |||
3197 | // just build an ordinary singleton decl ref. | |||
3198 | if (!NeedsADL && R.isSingleResult() && | |||
3199 | !R.getAsSingle<FunctionTemplateDecl>() && | |||
3200 | !ShouldLookupResultBeMultiVersionOverload(R)) | |||
3201 | return BuildDeclarationNameExpr(SS, R.getLookupNameInfo(), R.getFoundDecl(), | |||
3202 | R.getRepresentativeDecl(), nullptr, | |||
3203 | AcceptInvalidDecl); | |||
3204 | ||||
3205 | // We only need to check the declaration if there's exactly one | |||
3206 | // result, because in the overloaded case the results can only be | |||
3207 | // functions and function templates. | |||
3208 | if (R.isSingleResult() && !ShouldLookupResultBeMultiVersionOverload(R) && | |||
3209 | CheckDeclInExpr(*this, R.getNameLoc(), R.getFoundDecl())) | |||
3210 | return ExprError(); | |||
3211 | ||||
3212 | // Otherwise, just build an unresolved lookup expression. Suppress | |||
3213 | // any lookup-related diagnostics; we'll hash these out later, when | |||
3214 | // we've picked a target. | |||
3215 | R.suppressDiagnostics(); | |||
3216 | ||||
3217 | UnresolvedLookupExpr *ULE | |||
3218 | = UnresolvedLookupExpr::Create(Context, R.getNamingClass(), | |||
3219 | SS.getWithLocInContext(Context), | |||
3220 | R.getLookupNameInfo(), | |||
3221 | NeedsADL, R.isOverloadedResult(), | |||
3222 | R.begin(), R.end()); | |||
3223 | ||||
3224 | return ULE; | |||
3225 | } | |||
3226 | ||||
3227 | static void | |||
3228 | diagnoseUncapturableValueReference(Sema &S, SourceLocation loc, | |||
3229 | ValueDecl *var, DeclContext *DC); | |||
3230 | ||||
3231 | /// Complete semantic analysis for a reference to the given declaration. | |||
3232 | ExprResult Sema::BuildDeclarationNameExpr( | |||
3233 | const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, NamedDecl *D, | |||
3234 | NamedDecl *FoundD, const TemplateArgumentListInfo *TemplateArgs, | |||
3235 | bool AcceptInvalidDecl) { | |||
3236 | assert(D && "Cannot refer to a NULL declaration")(static_cast <bool> (D && "Cannot refer to a NULL declaration" ) ? void (0) : __assert_fail ("D && \"Cannot refer to a NULL declaration\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3236, __extension__ __PRETTY_FUNCTION__)); | |||
3237 | assert(!isa<FunctionTemplateDecl>(D) &&(static_cast <bool> (!isa<FunctionTemplateDecl>(D ) && "Cannot refer unambiguously to a function template" ) ? void (0) : __assert_fail ("!isa<FunctionTemplateDecl>(D) && \"Cannot refer unambiguously to a function template\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3238, __extension__ __PRETTY_FUNCTION__)) | |||
3238 | "Cannot refer unambiguously to a function template")(static_cast <bool> (!isa<FunctionTemplateDecl>(D ) && "Cannot refer unambiguously to a function template" ) ? void (0) : __assert_fail ("!isa<FunctionTemplateDecl>(D) && \"Cannot refer unambiguously to a function template\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3238, __extension__ __PRETTY_FUNCTION__)); | |||
3239 | ||||
3240 | SourceLocation Loc = NameInfo.getLoc(); | |||
3241 | if (CheckDeclInExpr(*this, Loc, D)) | |||
3242 | return ExprError(); | |||
3243 | ||||
3244 | if (TemplateDecl *Template = dyn_cast<TemplateDecl>(D)) { | |||
3245 | // Specifically diagnose references to class templates that are missing | |||
3246 | // a template argument list. | |||
3247 | diagnoseMissingTemplateArguments(TemplateName(Template), Loc); | |||
3248 | return ExprError(); | |||
3249 | } | |||
3250 | ||||
3251 | // Make sure that we're referring to a value. | |||
3252 | if (!isa<ValueDecl, UnresolvedUsingIfExistsDecl>(D)) { | |||
3253 | Diag(Loc, diag::err_ref_non_value) << D << SS.getRange(); | |||
3254 | Diag(D->getLocation(), diag::note_declared_at); | |||
3255 | return ExprError(); | |||
3256 | } | |||
3257 | ||||
3258 | // Check whether this declaration can be used. Note that we suppress | |||
3259 | // this check when we're going to perform argument-dependent lookup | |||
3260 | // on this function name, because this might not be the function | |||
3261 | // that overload resolution actually selects. | |||
3262 | if (DiagnoseUseOfDecl(D, Loc)) | |||
3263 | return ExprError(); | |||
3264 | ||||
3265 | auto *VD = cast<ValueDecl>(D); | |||
3266 | ||||
3267 | // Only create DeclRefExpr's for valid Decl's. | |||
3268 | if (VD->isInvalidDecl() && !AcceptInvalidDecl) | |||
3269 | return ExprError(); | |||
3270 | ||||
3271 | // Handle members of anonymous structs and unions. If we got here, | |||
3272 | // and the reference is to a class member indirect field, then this | |||
3273 | // must be the subject of a pointer-to-member expression. | |||
3274 | if (IndirectFieldDecl *indirectField = dyn_cast<IndirectFieldDecl>(VD)) | |||
3275 | if (!indirectField->isCXXClassMember()) | |||
3276 | return BuildAnonymousStructUnionMemberReference(SS, NameInfo.getLoc(), | |||
3277 | indirectField); | |||
3278 | ||||
3279 | QualType type = VD->getType(); | |||
3280 | if (type.isNull()) | |||
3281 | return ExprError(); | |||
3282 | ExprValueKind valueKind = VK_PRValue; | |||
3283 | ||||
3284 | // In 'T ...V;', the type of the declaration 'V' is 'T...', but the type of | |||
3285 | // a reference to 'V' is simply (unexpanded) 'T'. The type, like the value, | |||
3286 | // is expanded by some outer '...' in the context of the use. | |||
3287 | type = type.getNonPackExpansionType(); | |||
3288 | ||||
3289 | switch (D->getKind()) { | |||
3290 | // Ignore all the non-ValueDecl kinds. | |||
3291 | #define ABSTRACT_DECL(kind) | |||
3292 | #define VALUE(type, base) | |||
3293 | #define DECL(type, base) case Decl::type: | |||
3294 | #include "clang/AST/DeclNodes.inc" | |||
3295 | llvm_unreachable("invalid value decl kind")::llvm::llvm_unreachable_internal("invalid value decl kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3295); | |||
3296 | ||||
3297 | // These shouldn't make it here. | |||
3298 | case Decl::ObjCAtDefsField: | |||
3299 | llvm_unreachable("forming non-member reference to ivar?")::llvm::llvm_unreachable_internal("forming non-member reference to ivar?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3299); | |||
3300 | ||||
3301 | // Enum constants are always r-values and never references. | |||
3302 | // Unresolved using declarations are dependent. | |||
3303 | case Decl::EnumConstant: | |||
3304 | case Decl::UnresolvedUsingValue: | |||
3305 | case Decl::OMPDeclareReduction: | |||
3306 | case Decl::OMPDeclareMapper: | |||
3307 | valueKind = VK_PRValue; | |||
3308 | break; | |||
3309 | ||||
3310 | // Fields and indirect fields that got here must be for | |||
3311 | // pointer-to-member expressions; we just call them l-values for | |||
3312 | // internal consistency, because this subexpression doesn't really | |||
3313 | // exist in the high-level semantics. | |||
3314 | case Decl::Field: | |||
3315 | case Decl::IndirectField: | |||
3316 | case Decl::ObjCIvar: | |||
3317 | assert(getLangOpts().CPlusPlus && "building reference to field in C?")(static_cast <bool> (getLangOpts().CPlusPlus && "building reference to field in C?") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"building reference to field in C?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3317, __extension__ __PRETTY_FUNCTION__)); | |||
3318 | ||||
3319 | // These can't have reference type in well-formed programs, but | |||
3320 | // for internal consistency we do this anyway. | |||
3321 | type = type.getNonReferenceType(); | |||
3322 | valueKind = VK_LValue; | |||
3323 | break; | |||
3324 | ||||
3325 | // Non-type template parameters are either l-values or r-values | |||
3326 | // depending on the type. | |||
3327 | case Decl::NonTypeTemplateParm: { | |||
3328 | if (const ReferenceType *reftype = type->getAs<ReferenceType>()) { | |||
3329 | type = reftype->getPointeeType(); | |||
3330 | valueKind = VK_LValue; // even if the parameter is an r-value reference | |||
3331 | break; | |||
3332 | } | |||
3333 | ||||
3334 | // [expr.prim.id.unqual]p2: | |||
3335 | // If the entity is a template parameter object for a template | |||
3336 | // parameter of type T, the type of the expression is const T. | |||
3337 | // [...] The expression is an lvalue if the entity is a [...] template | |||
3338 | // parameter object. | |||
3339 | if (type->isRecordType()) { | |||
3340 | type = type.getUnqualifiedType().withConst(); | |||
3341 | valueKind = VK_LValue; | |||
3342 | break; | |||
3343 | } | |||
3344 | ||||
3345 | // For non-references, we need to strip qualifiers just in case | |||
3346 | // the template parameter was declared as 'const int' or whatever. | |||
3347 | valueKind = VK_PRValue; | |||
3348 | type = type.getUnqualifiedType(); | |||
3349 | break; | |||
3350 | } | |||
3351 | ||||
3352 | case Decl::Var: | |||
3353 | case Decl::VarTemplateSpecialization: | |||
3354 | case Decl::VarTemplatePartialSpecialization: | |||
3355 | case Decl::Decomposition: | |||
3356 | case Decl::OMPCapturedExpr: | |||
3357 | // In C, "extern void blah;" is valid and is an r-value. | |||
3358 | if (!getLangOpts().CPlusPlus && !type.hasQualifiers() && | |||
3359 | type->isVoidType()) { | |||
3360 | valueKind = VK_PRValue; | |||
3361 | break; | |||
3362 | } | |||
3363 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
3364 | ||||
3365 | case Decl::ImplicitParam: | |||
3366 | case Decl::ParmVar: { | |||
3367 | // These are always l-values. | |||
3368 | valueKind = VK_LValue; | |||
3369 | type = type.getNonReferenceType(); | |||
3370 | ||||
3371 | // FIXME: Does the addition of const really only apply in | |||
3372 | // potentially-evaluated contexts? Since the variable isn't actually | |||
3373 | // captured in an unevaluated context, it seems that the answer is no. | |||
3374 | if (!isUnevaluatedContext()) { | |||
3375 | QualType CapturedType = getCapturedDeclRefType(cast<VarDecl>(VD), Loc); | |||
3376 | if (!CapturedType.isNull()) | |||
3377 | type = CapturedType; | |||
3378 | } | |||
3379 | ||||
3380 | break; | |||
3381 | } | |||
3382 | ||||
3383 | case Decl::Binding: { | |||
3384 | // These are always lvalues. | |||
3385 | valueKind = VK_LValue; | |||
3386 | type = type.getNonReferenceType(); | |||
3387 | // FIXME: Support lambda-capture of BindingDecls, once CWG actually | |||
3388 | // decides how that's supposed to work. | |||
3389 | auto *BD = cast<BindingDecl>(VD); | |||
3390 | if (BD->getDeclContext() != CurContext) { | |||
3391 | auto *DD = dyn_cast_or_null<VarDecl>(BD->getDecomposedDecl()); | |||
3392 | if (DD && DD->hasLocalStorage()) | |||
3393 | diagnoseUncapturableValueReference(*this, Loc, BD, CurContext); | |||
3394 | } | |||
3395 | break; | |||
3396 | } | |||
3397 | ||||
3398 | case Decl::Function: { | |||
3399 | if (unsigned BID = cast<FunctionDecl>(VD)->getBuiltinID()) { | |||
3400 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BID)) { | |||
3401 | type = Context.BuiltinFnTy; | |||
3402 | valueKind = VK_PRValue; | |||
3403 | break; | |||
3404 | } | |||
3405 | } | |||
3406 | ||||
3407 | const FunctionType *fty = type->castAs<FunctionType>(); | |||
3408 | ||||
3409 | // If we're referring to a function with an __unknown_anytype | |||
3410 | // result type, make the entire expression __unknown_anytype. | |||
3411 | if (fty->getReturnType() == Context.UnknownAnyTy) { | |||
3412 | type = Context.UnknownAnyTy; | |||
3413 | valueKind = VK_PRValue; | |||
3414 | break; | |||
3415 | } | |||
3416 | ||||
3417 | // Functions are l-values in C++. | |||
3418 | if (getLangOpts().CPlusPlus) { | |||
3419 | valueKind = VK_LValue; | |||
3420 | break; | |||
3421 | } | |||
3422 | ||||
3423 | // C99 DR 316 says that, if a function type comes from a | |||
3424 | // function definition (without a prototype), that type is only | |||
3425 | // used for checking compatibility. Therefore, when referencing | |||
3426 | // the function, we pretend that we don't have the full function | |||
3427 | // type. | |||
3428 | if (!cast<FunctionDecl>(VD)->hasPrototype() && isa<FunctionProtoType>(fty)) | |||
3429 | type = Context.getFunctionNoProtoType(fty->getReturnType(), | |||
3430 | fty->getExtInfo()); | |||
3431 | ||||
3432 | // Functions are r-values in C. | |||
3433 | valueKind = VK_PRValue; | |||
3434 | break; | |||
3435 | } | |||
3436 | ||||
3437 | case Decl::CXXDeductionGuide: | |||
3438 | llvm_unreachable("building reference to deduction guide")::llvm::llvm_unreachable_internal("building reference to deduction guide" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3438); | |||
3439 | ||||
3440 | case Decl::MSProperty: | |||
3441 | case Decl::MSGuid: | |||
3442 | case Decl::TemplateParamObject: | |||
3443 | // FIXME: Should MSGuidDecl and template parameter objects be subject to | |||
3444 | // capture in OpenMP, or duplicated between host and device? | |||
3445 | valueKind = VK_LValue; | |||
3446 | break; | |||
3447 | ||||
3448 | case Decl::CXXMethod: | |||
3449 | // If we're referring to a method with an __unknown_anytype | |||
3450 | // result type, make the entire expression __unknown_anytype. | |||
3451 | // This should only be possible with a type written directly. | |||
3452 | if (const FunctionProtoType *proto = | |||
3453 | dyn_cast<FunctionProtoType>(VD->getType())) | |||
3454 | if (proto->getReturnType() == Context.UnknownAnyTy) { | |||
3455 | type = Context.UnknownAnyTy; | |||
3456 | valueKind = VK_PRValue; | |||
3457 | break; | |||
3458 | } | |||
3459 | ||||
3460 | // C++ methods are l-values if static, r-values if non-static. | |||
3461 | if (cast<CXXMethodDecl>(VD)->isStatic()) { | |||
3462 | valueKind = VK_LValue; | |||
3463 | break; | |||
3464 | } | |||
3465 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
3466 | ||||
3467 | case Decl::CXXConversion: | |||
3468 | case Decl::CXXDestructor: | |||
3469 | case Decl::CXXConstructor: | |||
3470 | valueKind = VK_PRValue; | |||
3471 | break; | |||
3472 | } | |||
3473 | ||||
3474 | return BuildDeclRefExpr(VD, type, valueKind, NameInfo, &SS, FoundD, | |||
3475 | /*FIXME: TemplateKWLoc*/ SourceLocation(), | |||
3476 | TemplateArgs); | |||
3477 | } | |||
3478 | ||||
3479 | static void ConvertUTF8ToWideString(unsigned CharByteWidth, StringRef Source, | |||
3480 | SmallString<32> &Target) { | |||
3481 | Target.resize(CharByteWidth * (Source.size() + 1)); | |||
3482 | char *ResultPtr = &Target[0]; | |||
3483 | const llvm::UTF8 *ErrorPtr; | |||
3484 | bool success = | |||
3485 | llvm::ConvertUTF8toWide(CharByteWidth, Source, ResultPtr, ErrorPtr); | |||
3486 | (void)success; | |||
3487 | assert(success)(static_cast <bool> (success) ? void (0) : __assert_fail ("success", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3487, __extension__ __PRETTY_FUNCTION__)); | |||
3488 | Target.resize(ResultPtr - &Target[0]); | |||
3489 | } | |||
3490 | ||||
3491 | ExprResult Sema::BuildPredefinedExpr(SourceLocation Loc, | |||
3492 | PredefinedExpr::IdentKind IK) { | |||
3493 | // Pick the current block, lambda, captured statement or function. | |||
3494 | Decl *currentDecl = nullptr; | |||
3495 | if (const BlockScopeInfo *BSI = getCurBlock()) | |||
3496 | currentDecl = BSI->TheDecl; | |||
3497 | else if (const LambdaScopeInfo *LSI = getCurLambda()) | |||
3498 | currentDecl = LSI->CallOperator; | |||
3499 | else if (const CapturedRegionScopeInfo *CSI = getCurCapturedRegion()) | |||
3500 | currentDecl = CSI->TheCapturedDecl; | |||
3501 | else | |||
3502 | currentDecl = getCurFunctionOrMethodDecl(); | |||
3503 | ||||
3504 | if (!currentDecl) { | |||
3505 | Diag(Loc, diag::ext_predef_outside_function); | |||
3506 | currentDecl = Context.getTranslationUnitDecl(); | |||
3507 | } | |||
3508 | ||||
3509 | QualType ResTy; | |||
3510 | StringLiteral *SL = nullptr; | |||
3511 | if (cast<DeclContext>(currentDecl)->isDependentContext()) | |||
3512 | ResTy = Context.DependentTy; | |||
3513 | else { | |||
3514 | // Pre-defined identifiers are of type char[x], where x is the length of | |||
3515 | // the string. | |||
3516 | auto Str = PredefinedExpr::ComputeName(IK, currentDecl); | |||
3517 | unsigned Length = Str.length(); | |||
3518 | ||||
3519 | llvm::APInt LengthI(32, Length + 1); | |||
3520 | if (IK == PredefinedExpr::LFunction || IK == PredefinedExpr::LFuncSig) { | |||
3521 | ResTy = | |||
3522 | Context.adjustStringLiteralBaseType(Context.WideCharTy.withConst()); | |||
3523 | SmallString<32> RawChars; | |||
3524 | ConvertUTF8ToWideString(Context.getTypeSizeInChars(ResTy).getQuantity(), | |||
3525 | Str, RawChars); | |||
3526 | ResTy = Context.getConstantArrayType(ResTy, LengthI, nullptr, | |||
3527 | ArrayType::Normal, | |||
3528 | /*IndexTypeQuals*/ 0); | |||
3529 | SL = StringLiteral::Create(Context, RawChars, StringLiteral::Wide, | |||
3530 | /*Pascal*/ false, ResTy, Loc); | |||
3531 | } else { | |||
3532 | ResTy = Context.adjustStringLiteralBaseType(Context.CharTy.withConst()); | |||
3533 | ResTy = Context.getConstantArrayType(ResTy, LengthI, nullptr, | |||
3534 | ArrayType::Normal, | |||
3535 | /*IndexTypeQuals*/ 0); | |||
3536 | SL = StringLiteral::Create(Context, Str, StringLiteral::Ascii, | |||
3537 | /*Pascal*/ false, ResTy, Loc); | |||
3538 | } | |||
3539 | } | |||
3540 | ||||
3541 | return PredefinedExpr::Create(Context, Loc, ResTy, IK, SL); | |||
3542 | } | |||
3543 | ||||
3544 | ExprResult Sema::BuildSYCLUniqueStableNameExpr(SourceLocation OpLoc, | |||
3545 | SourceLocation LParen, | |||
3546 | SourceLocation RParen, | |||
3547 | TypeSourceInfo *TSI) { | |||
3548 | return SYCLUniqueStableNameExpr::Create(Context, OpLoc, LParen, RParen, TSI); | |||
3549 | } | |||
3550 | ||||
3551 | ExprResult Sema::ActOnSYCLUniqueStableNameExpr(SourceLocation OpLoc, | |||
3552 | SourceLocation LParen, | |||
3553 | SourceLocation RParen, | |||
3554 | ParsedType ParsedTy) { | |||
3555 | TypeSourceInfo *TSI = nullptr; | |||
3556 | QualType Ty = GetTypeFromParser(ParsedTy, &TSI); | |||
3557 | ||||
3558 | if (Ty.isNull()) | |||
3559 | return ExprError(); | |||
3560 | if (!TSI) | |||
3561 | TSI = Context.getTrivialTypeSourceInfo(Ty, LParen); | |||
3562 | ||||
3563 | return BuildSYCLUniqueStableNameExpr(OpLoc, LParen, RParen, TSI); | |||
3564 | } | |||
3565 | ||||
3566 | ExprResult Sema::ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind) { | |||
3567 | PredefinedExpr::IdentKind IK; | |||
3568 | ||||
3569 | switch (Kind) { | |||
3570 | default: llvm_unreachable("Unknown simple primary expr!")::llvm::llvm_unreachable_internal("Unknown simple primary expr!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3570); | |||
3571 | case tok::kw___func__: IK = PredefinedExpr::Func; break; // [C99 6.4.2.2] | |||
3572 | case tok::kw___FUNCTION__: IK = PredefinedExpr::Function; break; | |||
3573 | case tok::kw___FUNCDNAME__: IK = PredefinedExpr::FuncDName; break; // [MS] | |||
3574 | case tok::kw___FUNCSIG__: IK = PredefinedExpr::FuncSig; break; // [MS] | |||
3575 | case tok::kw_L__FUNCTION__: IK = PredefinedExpr::LFunction; break; // [MS] | |||
3576 | case tok::kw_L__FUNCSIG__: IK = PredefinedExpr::LFuncSig; break; // [MS] | |||
3577 | case tok::kw___PRETTY_FUNCTION__: IK = PredefinedExpr::PrettyFunction; break; | |||
3578 | } | |||
3579 | ||||
3580 | return BuildPredefinedExpr(Loc, IK); | |||
3581 | } | |||
3582 | ||||
3583 | ExprResult Sema::ActOnCharacterConstant(const Token &Tok, Scope *UDLScope) { | |||
3584 | SmallString<16> CharBuffer; | |||
3585 | bool Invalid = false; | |||
3586 | StringRef ThisTok = PP.getSpelling(Tok, CharBuffer, &Invalid); | |||
3587 | if (Invalid) | |||
3588 | return ExprError(); | |||
3589 | ||||
3590 | CharLiteralParser Literal(ThisTok.begin(), ThisTok.end(), Tok.getLocation(), | |||
3591 | PP, Tok.getKind()); | |||
3592 | if (Literal.hadError()) | |||
3593 | return ExprError(); | |||
3594 | ||||
3595 | QualType Ty; | |||
3596 | if (Literal.isWide()) | |||
3597 | Ty = Context.WideCharTy; // L'x' -> wchar_t in C and C++. | |||
3598 | else if (Literal.isUTF8() && getLangOpts().Char8) | |||
3599 | Ty = Context.Char8Ty; // u8'x' -> char8_t when it exists. | |||
3600 | else if (Literal.isUTF16()) | |||
3601 | Ty = Context.Char16Ty; // u'x' -> char16_t in C11 and C++11. | |||
3602 | else if (Literal.isUTF32()) | |||
3603 | Ty = Context.Char32Ty; // U'x' -> char32_t in C11 and C++11. | |||
3604 | else if (!getLangOpts().CPlusPlus || Literal.isMultiChar()) | |||
3605 | Ty = Context.IntTy; // 'x' -> int in C, 'wxyz' -> int in C++. | |||
3606 | else | |||
3607 | Ty = Context.CharTy; // 'x' -> char in C++ | |||
3608 | ||||
3609 | CharacterLiteral::CharacterKind Kind = CharacterLiteral::Ascii; | |||
3610 | if (Literal.isWide()) | |||
3611 | Kind = CharacterLiteral::Wide; | |||
3612 | else if (Literal.isUTF16()) | |||
3613 | Kind = CharacterLiteral::UTF16; | |||
3614 | else if (Literal.isUTF32()) | |||
3615 | Kind = CharacterLiteral::UTF32; | |||
3616 | else if (Literal.isUTF8()) | |||
3617 | Kind = CharacterLiteral::UTF8; | |||
3618 | ||||
3619 | Expr *Lit = new (Context) CharacterLiteral(Literal.getValue(), Kind, Ty, | |||
3620 | Tok.getLocation()); | |||
3621 | ||||
3622 | if (Literal.getUDSuffix().empty()) | |||
3623 | return Lit; | |||
3624 | ||||
3625 | // We're building a user-defined literal. | |||
3626 | IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
3627 | SourceLocation UDSuffixLoc = | |||
3628 | getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset()); | |||
3629 | ||||
3630 | // Make sure we're allowed user-defined literals here. | |||
3631 | if (!UDLScope) | |||
3632 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_character_udl)); | |||
3633 | ||||
3634 | // C++11 [lex.ext]p6: The literal L is treated as a call of the form | |||
3635 | // operator "" X (ch) | |||
3636 | return BuildCookedLiteralOperatorCall(*this, UDLScope, UDSuffix, UDSuffixLoc, | |||
3637 | Lit, Tok.getLocation()); | |||
3638 | } | |||
3639 | ||||
3640 | ExprResult Sema::ActOnIntegerConstant(SourceLocation Loc, uint64_t Val) { | |||
3641 | unsigned IntSize = Context.getTargetInfo().getIntWidth(); | |||
3642 | return IntegerLiteral::Create(Context, llvm::APInt(IntSize, Val), | |||
3643 | Context.IntTy, Loc); | |||
3644 | } | |||
3645 | ||||
3646 | static Expr *BuildFloatingLiteral(Sema &S, NumericLiteralParser &Literal, | |||
3647 | QualType Ty, SourceLocation Loc) { | |||
3648 | const llvm::fltSemantics &Format = S.Context.getFloatTypeSemantics(Ty); | |||
3649 | ||||
3650 | using llvm::APFloat; | |||
3651 | APFloat Val(Format); | |||
3652 | ||||
3653 | APFloat::opStatus result = Literal.GetFloatValue(Val); | |||
3654 | ||||
3655 | // Overflow is always an error, but underflow is only an error if | |||
3656 | // we underflowed to zero (APFloat reports denormals as underflow). | |||
3657 | if ((result & APFloat::opOverflow) || | |||
3658 | ((result & APFloat::opUnderflow) && Val.isZero())) { | |||
3659 | unsigned diagnostic; | |||
3660 | SmallString<20> buffer; | |||
3661 | if (result & APFloat::opOverflow) { | |||
3662 | diagnostic = diag::warn_float_overflow; | |||
3663 | APFloat::getLargest(Format).toString(buffer); | |||
3664 | } else { | |||
3665 | diagnostic = diag::warn_float_underflow; | |||
3666 | APFloat::getSmallest(Format).toString(buffer); | |||
3667 | } | |||
3668 | ||||
3669 | S.Diag(Loc, diagnostic) | |||
3670 | << Ty | |||
3671 | << StringRef(buffer.data(), buffer.size()); | |||
3672 | } | |||
3673 | ||||
3674 | bool isExact = (result == APFloat::opOK); | |||
3675 | return FloatingLiteral::Create(S.Context, Val, isExact, Ty, Loc); | |||
3676 | } | |||
3677 | ||||
3678 | bool Sema::CheckLoopHintExpr(Expr *E, SourceLocation Loc) { | |||
3679 | assert(E && "Invalid expression")(static_cast <bool> (E && "Invalid expression") ? void (0) : __assert_fail ("E && \"Invalid expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3679, __extension__ __PRETTY_FUNCTION__)); | |||
3680 | ||||
3681 | if (E->isValueDependent()) | |||
3682 | return false; | |||
3683 | ||||
3684 | QualType QT = E->getType(); | |||
3685 | if (!QT->isIntegerType() || QT->isBooleanType() || QT->isCharType()) { | |||
3686 | Diag(E->getExprLoc(), diag::err_pragma_loop_invalid_argument_type) << QT; | |||
3687 | return true; | |||
3688 | } | |||
3689 | ||||
3690 | llvm::APSInt ValueAPS; | |||
3691 | ExprResult R = VerifyIntegerConstantExpression(E, &ValueAPS); | |||
3692 | ||||
3693 | if (R.isInvalid()) | |||
3694 | return true; | |||
3695 | ||||
3696 | bool ValueIsPositive = ValueAPS.isStrictlyPositive(); | |||
3697 | if (!ValueIsPositive || ValueAPS.getActiveBits() > 31) { | |||
3698 | Diag(E->getExprLoc(), diag::err_pragma_loop_invalid_argument_value) | |||
3699 | << toString(ValueAPS, 10) << ValueIsPositive; | |||
3700 | return true; | |||
3701 | } | |||
3702 | ||||
3703 | return false; | |||
3704 | } | |||
3705 | ||||
3706 | ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) { | |||
3707 | // Fast path for a single digit (which is quite common). A single digit | |||
3708 | // cannot have a trigraph, escaped newline, radix prefix, or suffix. | |||
3709 | if (Tok.getLength() == 1) { | |||
3710 | const char Val = PP.getSpellingOfSingleCharacterNumericConstant(Tok); | |||
3711 | return ActOnIntegerConstant(Tok.getLocation(), Val-'0'); | |||
3712 | } | |||
3713 | ||||
3714 | SmallString<128> SpellingBuffer; | |||
3715 | // NumericLiteralParser wants to overread by one character. Add padding to | |||
3716 | // the buffer in case the token is copied to the buffer. If getSpelling() | |||
3717 | // returns a StringRef to the memory buffer, it should have a null char at | |||
3718 | // the EOF, so it is also safe. | |||
3719 | SpellingBuffer.resize(Tok.getLength() + 1); | |||
3720 | ||||
3721 | // Get the spelling of the token, which eliminates trigraphs, etc. | |||
3722 | bool Invalid = false; | |||
3723 | StringRef TokSpelling = PP.getSpelling(Tok, SpellingBuffer, &Invalid); | |||
3724 | if (Invalid) | |||
3725 | return ExprError(); | |||
3726 | ||||
3727 | NumericLiteralParser Literal(TokSpelling, Tok.getLocation(), | |||
3728 | PP.getSourceManager(), PP.getLangOpts(), | |||
3729 | PP.getTargetInfo(), PP.getDiagnostics()); | |||
3730 | if (Literal.hadError) | |||
3731 | return ExprError(); | |||
3732 | ||||
3733 | if (Literal.hasUDSuffix()) { | |||
3734 | // We're building a user-defined literal. | |||
3735 | IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
3736 | SourceLocation UDSuffixLoc = | |||
3737 | getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset()); | |||
3738 | ||||
3739 | // Make sure we're allowed user-defined literals here. | |||
3740 | if (!UDLScope) | |||
3741 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_numeric_udl)); | |||
3742 | ||||
3743 | QualType CookedTy; | |||
3744 | if (Literal.isFloatingLiteral()) { | |||
3745 | // C++11 [lex.ext]p4: If S contains a literal operator with parameter type | |||
3746 | // long double, the literal is treated as a call of the form | |||
3747 | // operator "" X (f L) | |||
3748 | CookedTy = Context.LongDoubleTy; | |||
3749 | } else { | |||
3750 | // C++11 [lex.ext]p3: If S contains a literal operator with parameter type | |||
3751 | // unsigned long long, the literal is treated as a call of the form | |||
3752 | // operator "" X (n ULL) | |||
3753 | CookedTy = Context.UnsignedLongLongTy; | |||
3754 | } | |||
3755 | ||||
3756 | DeclarationName OpName = | |||
3757 | Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
3758 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
3759 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
3760 | ||||
3761 | SourceLocation TokLoc = Tok.getLocation(); | |||
3762 | ||||
3763 | // Perform literal operator lookup to determine if we're building a raw | |||
3764 | // literal or a cooked one. | |||
3765 | LookupResult R(*this, OpName, UDSuffixLoc, LookupOrdinaryName); | |||
3766 | switch (LookupLiteralOperator(UDLScope, R, CookedTy, | |||
3767 | /*AllowRaw*/ true, /*AllowTemplate*/ true, | |||
3768 | /*AllowStringTemplatePack*/ false, | |||
3769 | /*DiagnoseMissing*/ !Literal.isImaginary)) { | |||
3770 | case LOLR_ErrorNoDiagnostic: | |||
3771 | // Lookup failure for imaginary constants isn't fatal, there's still the | |||
3772 | // GNU extension producing _Complex types. | |||
3773 | break; | |||
3774 | case LOLR_Error: | |||
3775 | return ExprError(); | |||
3776 | case LOLR_Cooked: { | |||
3777 | Expr *Lit; | |||
3778 | if (Literal.isFloatingLiteral()) { | |||
3779 | Lit = BuildFloatingLiteral(*this, Literal, CookedTy, Tok.getLocation()); | |||
3780 | } else { | |||
3781 | llvm::APInt ResultVal(Context.getTargetInfo().getLongLongWidth(), 0); | |||
3782 | if (Literal.GetIntegerValue(ResultVal)) | |||
3783 | Diag(Tok.getLocation(), diag::err_integer_literal_too_large) | |||
3784 | << /* Unsigned */ 1; | |||
3785 | Lit = IntegerLiteral::Create(Context, ResultVal, CookedTy, | |||
3786 | Tok.getLocation()); | |||
3787 | } | |||
3788 | return BuildLiteralOperatorCall(R, OpNameInfo, Lit, TokLoc); | |||
3789 | } | |||
3790 | ||||
3791 | case LOLR_Raw: { | |||
3792 | // C++11 [lit.ext]p3, p4: If S contains a raw literal operator, the | |||
3793 | // literal is treated as a call of the form | |||
3794 | // operator "" X ("n") | |||
3795 | unsigned Length = Literal.getUDSuffixOffset(); | |||
3796 | QualType StrTy = Context.getConstantArrayType( | |||
3797 | Context.adjustStringLiteralBaseType(Context.CharTy.withConst()), | |||
3798 | llvm::APInt(32, Length + 1), nullptr, ArrayType::Normal, 0); | |||
3799 | Expr *Lit = StringLiteral::Create( | |||
3800 | Context, StringRef(TokSpelling.data(), Length), StringLiteral::Ascii, | |||
3801 | /*Pascal*/false, StrTy, &TokLoc, 1); | |||
3802 | return BuildLiteralOperatorCall(R, OpNameInfo, Lit, TokLoc); | |||
3803 | } | |||
3804 | ||||
3805 | case LOLR_Template: { | |||
3806 | // C++11 [lit.ext]p3, p4: Otherwise (S contains a literal operator | |||
3807 | // template), L is treated as a call fo the form | |||
3808 | // operator "" X <'c1', 'c2', ... 'ck'>() | |||
3809 | // where n is the source character sequence c1 c2 ... ck. | |||
3810 | TemplateArgumentListInfo ExplicitArgs; | |||
3811 | unsigned CharBits = Context.getIntWidth(Context.CharTy); | |||
3812 | bool CharIsUnsigned = Context.CharTy->isUnsignedIntegerType(); | |||
3813 | llvm::APSInt Value(CharBits, CharIsUnsigned); | |||
3814 | for (unsigned I = 0, N = Literal.getUDSuffixOffset(); I != N; ++I) { | |||
3815 | Value = TokSpelling[I]; | |||
3816 | TemplateArgument Arg(Context, Value, Context.CharTy); | |||
3817 | TemplateArgumentLocInfo ArgInfo; | |||
3818 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
3819 | } | |||
3820 | return BuildLiteralOperatorCall(R, OpNameInfo, None, TokLoc, | |||
3821 | &ExplicitArgs); | |||
3822 | } | |||
3823 | case LOLR_StringTemplatePack: | |||
3824 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3824); | |||
3825 | } | |||
3826 | } | |||
3827 | ||||
3828 | Expr *Res; | |||
3829 | ||||
3830 | if (Literal.isFixedPointLiteral()) { | |||
3831 | QualType Ty; | |||
3832 | ||||
3833 | if (Literal.isAccum) { | |||
3834 | if (Literal.isHalf) { | |||
3835 | Ty = Context.ShortAccumTy; | |||
3836 | } else if (Literal.isLong) { | |||
3837 | Ty = Context.LongAccumTy; | |||
3838 | } else { | |||
3839 | Ty = Context.AccumTy; | |||
3840 | } | |||
3841 | } else if (Literal.isFract) { | |||
3842 | if (Literal.isHalf) { | |||
3843 | Ty = Context.ShortFractTy; | |||
3844 | } else if (Literal.isLong) { | |||
3845 | Ty = Context.LongFractTy; | |||
3846 | } else { | |||
3847 | Ty = Context.FractTy; | |||
3848 | } | |||
3849 | } | |||
3850 | ||||
3851 | if (Literal.isUnsigned) Ty = Context.getCorrespondingUnsignedType(Ty); | |||
3852 | ||||
3853 | bool isSigned = !Literal.isUnsigned; | |||
3854 | unsigned scale = Context.getFixedPointScale(Ty); | |||
3855 | unsigned bit_width = Context.getTypeInfo(Ty).Width; | |||
3856 | ||||
3857 | llvm::APInt Val(bit_width, 0, isSigned); | |||
3858 | bool Overflowed = Literal.GetFixedPointValue(Val, scale); | |||
3859 | bool ValIsZero = Val.isNullValue() && !Overflowed; | |||
3860 | ||||
3861 | auto MaxVal = Context.getFixedPointMax(Ty).getValue(); | |||
3862 | if (Literal.isFract && Val == MaxVal + 1 && !ValIsZero) | |||
3863 | // Clause 6.4.4 - The value of a constant shall be in the range of | |||
3864 | // representable values for its type, with exception for constants of a | |||
3865 | // fract type with a value of exactly 1; such a constant shall denote | |||
3866 | // the maximal value for the type. | |||
3867 | --Val; | |||
3868 | else if (Val.ugt(MaxVal) || Overflowed) | |||
3869 | Diag(Tok.getLocation(), diag::err_too_large_for_fixed_point); | |||
3870 | ||||
3871 | Res = FixedPointLiteral::CreateFromRawInt(Context, Val, Ty, | |||
3872 | Tok.getLocation(), scale); | |||
3873 | } else if (Literal.isFloatingLiteral()) { | |||
3874 | QualType Ty; | |||
3875 | if (Literal.isHalf){ | |||
3876 | if (getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts())) | |||
3877 | Ty = Context.HalfTy; | |||
3878 | else { | |||
3879 | Diag(Tok.getLocation(), diag::err_half_const_requires_fp16); | |||
3880 | return ExprError(); | |||
3881 | } | |||
3882 | } else if (Literal.isFloat) | |||
3883 | Ty = Context.FloatTy; | |||
3884 | else if (Literal.isLong) | |||
3885 | Ty = Context.LongDoubleTy; | |||
3886 | else if (Literal.isFloat16) | |||
3887 | Ty = Context.Float16Ty; | |||
3888 | else if (Literal.isFloat128) | |||
3889 | Ty = Context.Float128Ty; | |||
3890 | else | |||
3891 | Ty = Context.DoubleTy; | |||
3892 | ||||
3893 | Res = BuildFloatingLiteral(*this, Literal, Ty, Tok.getLocation()); | |||
3894 | ||||
3895 | if (Ty == Context.DoubleTy) { | |||
3896 | if (getLangOpts().SinglePrecisionConstants) { | |||
3897 | if (Ty->castAs<BuiltinType>()->getKind() != BuiltinType::Float) { | |||
3898 | Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).get(); | |||
3899 | } | |||
3900 | } else if (getLangOpts().OpenCL && !getOpenCLOptions().isAvailableOption( | |||
3901 | "cl_khr_fp64", getLangOpts())) { | |||
3902 | // Impose single-precision float type when cl_khr_fp64 is not enabled. | |||
3903 | Diag(Tok.getLocation(), diag::warn_double_const_requires_fp64) | |||
3904 | << (getLangOpts().OpenCLVersion >= 300); | |||
3905 | Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).get(); | |||
3906 | } | |||
3907 | } | |||
3908 | } else if (!Literal.isIntegerLiteral()) { | |||
3909 | return ExprError(); | |||
3910 | } else { | |||
3911 | QualType Ty; | |||
3912 | ||||
3913 | // 'long long' is a C99 or C++11 feature. | |||
3914 | if (!getLangOpts().C99 && Literal.isLongLong) { | |||
3915 | if (getLangOpts().CPlusPlus) | |||
3916 | Diag(Tok.getLocation(), | |||
3917 | getLangOpts().CPlusPlus11 ? | |||
3918 | diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong); | |||
3919 | else | |||
3920 | Diag(Tok.getLocation(), diag::ext_c99_longlong); | |||
3921 | } | |||
3922 | ||||
3923 | // 'z/uz' literals are a C++2b feature. | |||
3924 | if (Literal.isSizeT) | |||
3925 | Diag(Tok.getLocation(), getLangOpts().CPlusPlus | |||
3926 | ? getLangOpts().CPlusPlus2b | |||
3927 | ? diag::warn_cxx20_compat_size_t_suffix | |||
3928 | : diag::ext_cxx2b_size_t_suffix | |||
3929 | : diag::err_cxx2b_size_t_suffix); | |||
3930 | ||||
3931 | // Get the value in the widest-possible width. | |||
3932 | unsigned MaxWidth = Context.getTargetInfo().getIntMaxTWidth(); | |||
3933 | llvm::APInt ResultVal(MaxWidth, 0); | |||
3934 | ||||
3935 | if (Literal.GetIntegerValue(ResultVal)) { | |||
3936 | // If this value didn't fit into uintmax_t, error and force to ull. | |||
3937 | Diag(Tok.getLocation(), diag::err_integer_literal_too_large) | |||
3938 | << /* Unsigned */ 1; | |||
3939 | Ty = Context.UnsignedLongLongTy; | |||
3940 | assert(Context.getTypeSize(Ty) == ResultVal.getBitWidth() &&(static_cast <bool> (Context.getTypeSize(Ty) == ResultVal .getBitWidth() && "long long is not intmax_t?") ? void (0) : __assert_fail ("Context.getTypeSize(Ty) == ResultVal.getBitWidth() && \"long long is not intmax_t?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3941, __extension__ __PRETTY_FUNCTION__)) | |||
3941 | "long long is not intmax_t?")(static_cast <bool> (Context.getTypeSize(Ty) == ResultVal .getBitWidth() && "long long is not intmax_t?") ? void (0) : __assert_fail ("Context.getTypeSize(Ty) == ResultVal.getBitWidth() && \"long long is not intmax_t?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3941, __extension__ __PRETTY_FUNCTION__)); | |||
3942 | } else { | |||
3943 | // If this value fits into a ULL, try to figure out what else it fits into | |||
3944 | // according to the rules of C99 6.4.4.1p5. | |||
3945 | ||||
3946 | // Octal, Hexadecimal, and integers with a U suffix are allowed to | |||
3947 | // be an unsigned int. | |||
3948 | bool AllowUnsigned = Literal.isUnsigned || Literal.getRadix() != 10; | |||
3949 | ||||
3950 | // Check from smallest to largest, picking the smallest type we can. | |||
3951 | unsigned Width = 0; | |||
3952 | ||||
3953 | // Microsoft specific integer suffixes are explicitly sized. | |||
3954 | if (Literal.MicrosoftInteger) { | |||
3955 | if (Literal.MicrosoftInteger == 8 && !Literal.isUnsigned) { | |||
3956 | Width = 8; | |||
3957 | Ty = Context.CharTy; | |||
3958 | } else { | |||
3959 | Width = Literal.MicrosoftInteger; | |||
3960 | Ty = Context.getIntTypeForBitwidth(Width, | |||
3961 | /*Signed=*/!Literal.isUnsigned); | |||
3962 | } | |||
3963 | } | |||
3964 | ||||
3965 | // Check C++2b size_t literals. | |||
3966 | if (Literal.isSizeT) { | |||
3967 | assert(!Literal.MicrosoftInteger &&(static_cast <bool> (!Literal.MicrosoftInteger && "size_t literals can't be Microsoft literals") ? void (0) : __assert_fail ("!Literal.MicrosoftInteger && \"size_t literals can't be Microsoft literals\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3968, __extension__ __PRETTY_FUNCTION__)) | |||
3968 | "size_t literals can't be Microsoft literals")(static_cast <bool> (!Literal.MicrosoftInteger && "size_t literals can't be Microsoft literals") ? void (0) : __assert_fail ("!Literal.MicrosoftInteger && \"size_t literals can't be Microsoft literals\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 3968, __extension__ __PRETTY_FUNCTION__)); | |||
3969 | unsigned SizeTSize = Context.getTargetInfo().getTypeWidth( | |||
3970 | Context.getTargetInfo().getSizeType()); | |||
3971 | ||||
3972 | // Does it fit in size_t? | |||
3973 | if (ResultVal.isIntN(SizeTSize)) { | |||
3974 | // Does it fit in ssize_t? | |||
3975 | if (!Literal.isUnsigned && ResultVal[SizeTSize - 1] == 0) | |||
3976 | Ty = Context.getSignedSizeType(); | |||
3977 | else if (AllowUnsigned) | |||
3978 | Ty = Context.getSizeType(); | |||
3979 | Width = SizeTSize; | |||
3980 | } | |||
3981 | } | |||
3982 | ||||
3983 | if (Ty.isNull() && !Literal.isLong && !Literal.isLongLong && | |||
3984 | !Literal.isSizeT) { | |||
3985 | // Are int/unsigned possibilities? | |||
3986 | unsigned IntSize = Context.getTargetInfo().getIntWidth(); | |||
3987 | ||||
3988 | // Does it fit in a unsigned int? | |||
3989 | if (ResultVal.isIntN(IntSize)) { | |||
3990 | // Does it fit in a signed int? | |||
3991 | if (!Literal.isUnsigned && ResultVal[IntSize-1] == 0) | |||
3992 | Ty = Context.IntTy; | |||
3993 | else if (AllowUnsigned) | |||
3994 | Ty = Context.UnsignedIntTy; | |||
3995 | Width = IntSize; | |||
3996 | } | |||
3997 | } | |||
3998 | ||||
3999 | // Are long/unsigned long possibilities? | |||
4000 | if (Ty.isNull() && !Literal.isLongLong && !Literal.isSizeT) { | |||
4001 | unsigned LongSize = Context.getTargetInfo().getLongWidth(); | |||
4002 | ||||
4003 | // Does it fit in a unsigned long? | |||
4004 | if (ResultVal.isIntN(LongSize)) { | |||
4005 | // Does it fit in a signed long? | |||
4006 | if (!Literal.isUnsigned && ResultVal[LongSize-1] == 0) | |||
4007 | Ty = Context.LongTy; | |||
4008 | else if (AllowUnsigned) | |||
4009 | Ty = Context.UnsignedLongTy; | |||
4010 | // Check according to the rules of C90 6.1.3.2p5. C++03 [lex.icon]p2 | |||
4011 | // is compatible. | |||
4012 | else if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11) { | |||
4013 | const unsigned LongLongSize = | |||
4014 | Context.getTargetInfo().getLongLongWidth(); | |||
4015 | Diag(Tok.getLocation(), | |||
4016 | getLangOpts().CPlusPlus | |||
4017 | ? Literal.isLong | |||
4018 | ? diag::warn_old_implicitly_unsigned_long_cxx | |||
4019 | : /*C++98 UB*/ diag:: | |||
4020 | ext_old_implicitly_unsigned_long_cxx | |||
4021 | : diag::warn_old_implicitly_unsigned_long) | |||
4022 | << (LongLongSize > LongSize ? /*will have type 'long long'*/ 0 | |||
4023 | : /*will be ill-formed*/ 1); | |||
4024 | Ty = Context.UnsignedLongTy; | |||
4025 | } | |||
4026 | Width = LongSize; | |||
4027 | } | |||
4028 | } | |||
4029 | ||||
4030 | // Check long long if needed. | |||
4031 | if (Ty.isNull() && !Literal.isSizeT) { | |||
4032 | unsigned LongLongSize = Context.getTargetInfo().getLongLongWidth(); | |||
4033 | ||||
4034 | // Does it fit in a unsigned long long? | |||
4035 | if (ResultVal.isIntN(LongLongSize)) { | |||
4036 | // Does it fit in a signed long long? | |||
4037 | // To be compatible with MSVC, hex integer literals ending with the | |||
4038 | // LL or i64 suffix are always signed in Microsoft mode. | |||
4039 | if (!Literal.isUnsigned && (ResultVal[LongLongSize-1] == 0 || | |||
4040 | (getLangOpts().MSVCCompat && Literal.isLongLong))) | |||
4041 | Ty = Context.LongLongTy; | |||
4042 | else if (AllowUnsigned) | |||
4043 | Ty = Context.UnsignedLongLongTy; | |||
4044 | Width = LongLongSize; | |||
4045 | } | |||
4046 | } | |||
4047 | ||||
4048 | // If we still couldn't decide a type, we either have 'size_t' literal | |||
4049 | // that is out of range, or a decimal literal that does not fit in a | |||
4050 | // signed long long and has no U suffix. | |||
4051 | if (Ty.isNull()) { | |||
4052 | if (Literal.isSizeT) | |||
4053 | Diag(Tok.getLocation(), diag::err_size_t_literal_too_large) | |||
4054 | << Literal.isUnsigned; | |||
4055 | else | |||
4056 | Diag(Tok.getLocation(), | |||
4057 | diag::ext_integer_literal_too_large_for_signed); | |||
4058 | Ty = Context.UnsignedLongLongTy; | |||
4059 | Width = Context.getTargetInfo().getLongLongWidth(); | |||
4060 | } | |||
4061 | ||||
4062 | if (ResultVal.getBitWidth() != Width) | |||
4063 | ResultVal = ResultVal.trunc(Width); | |||
4064 | } | |||
4065 | Res = IntegerLiteral::Create(Context, ResultVal, Ty, Tok.getLocation()); | |||
4066 | } | |||
4067 | ||||
4068 | // If this is an imaginary literal, create the ImaginaryLiteral wrapper. | |||
4069 | if (Literal.isImaginary) { | |||
4070 | Res = new (Context) ImaginaryLiteral(Res, | |||
4071 | Context.getComplexType(Res->getType())); | |||
4072 | ||||
4073 | Diag(Tok.getLocation(), diag::ext_imaginary_constant); | |||
4074 | } | |||
4075 | return Res; | |||
4076 | } | |||
4077 | ||||
4078 | ExprResult Sema::ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E) { | |||
4079 | assert(E && "ActOnParenExpr() missing expr")(static_cast <bool> (E && "ActOnParenExpr() missing expr" ) ? void (0) : __assert_fail ("E && \"ActOnParenExpr() missing expr\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4079, __extension__ __PRETTY_FUNCTION__)); | |||
4080 | QualType ExprTy = E->getType(); | |||
4081 | if (getLangOpts().ProtectParens && CurFPFeatures.getAllowFPReassociate() && | |||
4082 | !E->isLValue() && ExprTy->hasFloatingRepresentation()) | |||
4083 | return BuildBuiltinCallExpr(R, Builtin::BI__arithmetic_fence, E); | |||
4084 | return new (Context) ParenExpr(L, R, E); | |||
4085 | } | |||
4086 | ||||
4087 | static bool CheckVecStepTraitOperandType(Sema &S, QualType T, | |||
4088 | SourceLocation Loc, | |||
4089 | SourceRange ArgRange) { | |||
4090 | // [OpenCL 1.1 6.11.12] "The vec_step built-in function takes a built-in | |||
4091 | // scalar or vector data type argument..." | |||
4092 | // Every built-in scalar type (OpenCL 1.1 6.1.1) is either an arithmetic | |||
4093 | // type (C99 6.2.5p18) or void. | |||
4094 | if (!(T->isArithmeticType() || T->isVoidType() || T->isVectorType())) { | |||
4095 | S.Diag(Loc, diag::err_vecstep_non_scalar_vector_type) | |||
4096 | << T << ArgRange; | |||
4097 | return true; | |||
4098 | } | |||
4099 | ||||
4100 | assert((T->isVoidType() || !T->isIncompleteType()) &&(static_cast <bool> ((T->isVoidType() || !T->isIncompleteType ()) && "Scalar types should always be complete") ? void (0) : __assert_fail ("(T->isVoidType() || !T->isIncompleteType()) && \"Scalar types should always be complete\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4101, __extension__ __PRETTY_FUNCTION__)) | |||
4101 | "Scalar types should always be complete")(static_cast <bool> ((T->isVoidType() || !T->isIncompleteType ()) && "Scalar types should always be complete") ? void (0) : __assert_fail ("(T->isVoidType() || !T->isIncompleteType()) && \"Scalar types should always be complete\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4101, __extension__ __PRETTY_FUNCTION__)); | |||
4102 | return false; | |||
4103 | } | |||
4104 | ||||
4105 | static bool CheckExtensionTraitOperandType(Sema &S, QualType T, | |||
4106 | SourceLocation Loc, | |||
4107 | SourceRange ArgRange, | |||
4108 | UnaryExprOrTypeTrait TraitKind) { | |||
4109 | // Invalid types must be hard errors for SFINAE in C++. | |||
4110 | if (S.LangOpts.CPlusPlus) | |||
4111 | return true; | |||
4112 | ||||
4113 | // C99 6.5.3.4p1: | |||
4114 | if (T->isFunctionType() && | |||
4115 | (TraitKind == UETT_SizeOf || TraitKind == UETT_AlignOf || | |||
4116 | TraitKind == UETT_PreferredAlignOf)) { | |||
4117 | // sizeof(function)/alignof(function) is allowed as an extension. | |||
4118 | S.Diag(Loc, diag::ext_sizeof_alignof_function_type) | |||
4119 | << getTraitSpelling(TraitKind) << ArgRange; | |||
4120 | return false; | |||
4121 | } | |||
4122 | ||||
4123 | // Allow sizeof(void)/alignof(void) as an extension, unless in OpenCL where | |||
4124 | // this is an error (OpenCL v1.1 s6.3.k) | |||
4125 | if (T->isVoidType()) { | |||
4126 | unsigned DiagID = S.LangOpts.OpenCL ? diag::err_opencl_sizeof_alignof_type | |||
4127 | : diag::ext_sizeof_alignof_void_type; | |||
4128 | S.Diag(Loc, DiagID) << getTraitSpelling(TraitKind) << ArgRange; | |||
4129 | return false; | |||
4130 | } | |||
4131 | ||||
4132 | return true; | |||
4133 | } | |||
4134 | ||||
4135 | static bool CheckObjCTraitOperandConstraints(Sema &S, QualType T, | |||
4136 | SourceLocation Loc, | |||
4137 | SourceRange ArgRange, | |||
4138 | UnaryExprOrTypeTrait TraitKind) { | |||
4139 | // Reject sizeof(interface) and sizeof(interface<proto>) if the | |||
4140 | // runtime doesn't allow it. | |||
4141 | if (!S.LangOpts.ObjCRuntime.allowsSizeofAlignof() && T->isObjCObjectType()) { | |||
4142 | S.Diag(Loc, diag::err_sizeof_nonfragile_interface) | |||
4143 | << T << (TraitKind == UETT_SizeOf) | |||
4144 | << ArgRange; | |||
4145 | return true; | |||
4146 | } | |||
4147 | ||||
4148 | return false; | |||
4149 | } | |||
4150 | ||||
4151 | /// Check whether E is a pointer from a decayed array type (the decayed | |||
4152 | /// pointer type is equal to T) and emit a warning if it is. | |||
4153 | static void warnOnSizeofOnArrayDecay(Sema &S, SourceLocation Loc, QualType T, | |||
4154 | Expr *E) { | |||
4155 | // Don't warn if the operation changed the type. | |||
4156 | if (T != E->getType()) | |||
4157 | return; | |||
4158 | ||||
4159 | // Now look for array decays. | |||
4160 | ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E); | |||
4161 | if (!ICE || ICE->getCastKind() != CK_ArrayToPointerDecay) | |||
4162 | return; | |||
4163 | ||||
4164 | S.Diag(Loc, diag::warn_sizeof_array_decay) << ICE->getSourceRange() | |||
4165 | << ICE->getType() | |||
4166 | << ICE->getSubExpr()->getType(); | |||
4167 | } | |||
4168 | ||||
4169 | /// Check the constraints on expression operands to unary type expression | |||
4170 | /// and type traits. | |||
4171 | /// | |||
4172 | /// Completes any types necessary and validates the constraints on the operand | |||
4173 | /// expression. The logic mostly mirrors the type-based overload, but may modify | |||
4174 | /// the expression as it completes the type for that expression through template | |||
4175 | /// instantiation, etc. | |||
4176 | bool Sema::CheckUnaryExprOrTypeTraitOperand(Expr *E, | |||
4177 | UnaryExprOrTypeTrait ExprKind) { | |||
4178 | QualType ExprTy = E->getType(); | |||
4179 | assert(!ExprTy->isReferenceType())(static_cast <bool> (!ExprTy->isReferenceType()) ? void (0) : __assert_fail ("!ExprTy->isReferenceType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4179, __extension__ __PRETTY_FUNCTION__)); | |||
4180 | ||||
4181 | bool IsUnevaluatedOperand = | |||
4182 | (ExprKind == UETT_SizeOf || ExprKind == UETT_AlignOf || | |||
4183 | ExprKind == UETT_PreferredAlignOf || ExprKind == UETT_VecStep); | |||
4184 | if (IsUnevaluatedOperand) { | |||
4185 | ExprResult Result = CheckUnevaluatedOperand(E); | |||
4186 | if (Result.isInvalid()) | |||
4187 | return true; | |||
4188 | E = Result.get(); | |||
4189 | } | |||
4190 | ||||
4191 | // The operand for sizeof and alignof is in an unevaluated expression context, | |||
4192 | // so side effects could result in unintended consequences. | |||
4193 | // Exclude instantiation-dependent expressions, because 'sizeof' is sometimes | |||
4194 | // used to build SFINAE gadgets. | |||
4195 | // FIXME: Should we consider instantiation-dependent operands to 'alignof'? | |||
4196 | if (IsUnevaluatedOperand && !inTemplateInstantiation() && | |||
4197 | !E->isInstantiationDependent() && | |||
4198 | E->HasSideEffects(Context, false)) | |||
4199 | Diag(E->getExprLoc(), diag::warn_side_effects_unevaluated_context); | |||
4200 | ||||
4201 | if (ExprKind == UETT_VecStep) | |||
4202 | return CheckVecStepTraitOperandType(*this, ExprTy, E->getExprLoc(), | |||
4203 | E->getSourceRange()); | |||
4204 | ||||
4205 | // Explicitly list some types as extensions. | |||
4206 | if (!CheckExtensionTraitOperandType(*this, ExprTy, E->getExprLoc(), | |||
4207 | E->getSourceRange(), ExprKind)) | |||
4208 | return false; | |||
4209 | ||||
4210 | // 'alignof' applied to an expression only requires the base element type of | |||
4211 | // the expression to be complete. 'sizeof' requires the expression's type to | |||
4212 | // be complete (and will attempt to complete it if it's an array of unknown | |||
4213 | // bound). | |||
4214 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
4215 | if (RequireCompleteSizedType( | |||
4216 | E->getExprLoc(), Context.getBaseElementType(E->getType()), | |||
4217 | diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4218 | getTraitSpelling(ExprKind), E->getSourceRange())) | |||
4219 | return true; | |||
4220 | } else { | |||
4221 | if (RequireCompleteSizedExprType( | |||
4222 | E, diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4223 | getTraitSpelling(ExprKind), E->getSourceRange())) | |||
4224 | return true; | |||
4225 | } | |||
4226 | ||||
4227 | // Completing the expression's type may have changed it. | |||
4228 | ExprTy = E->getType(); | |||
4229 | assert(!ExprTy->isReferenceType())(static_cast <bool> (!ExprTy->isReferenceType()) ? void (0) : __assert_fail ("!ExprTy->isReferenceType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4229, __extension__ __PRETTY_FUNCTION__)); | |||
4230 | ||||
4231 | if (ExprTy->isFunctionType()) { | |||
4232 | Diag(E->getExprLoc(), diag::err_sizeof_alignof_function_type) | |||
4233 | << getTraitSpelling(ExprKind) << E->getSourceRange(); | |||
4234 | return true; | |||
4235 | } | |||
4236 | ||||
4237 | if (CheckObjCTraitOperandConstraints(*this, ExprTy, E->getExprLoc(), | |||
4238 | E->getSourceRange(), ExprKind)) | |||
4239 | return true; | |||
4240 | ||||
4241 | if (ExprKind == UETT_SizeOf) { | |||
4242 | if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { | |||
4243 | if (ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(DeclRef->getFoundDecl())) { | |||
4244 | QualType OType = PVD->getOriginalType(); | |||
4245 | QualType Type = PVD->getType(); | |||
4246 | if (Type->isPointerType() && OType->isArrayType()) { | |||
4247 | Diag(E->getExprLoc(), diag::warn_sizeof_array_param) | |||
4248 | << Type << OType; | |||
4249 | Diag(PVD->getLocation(), diag::note_declared_at); | |||
4250 | } | |||
4251 | } | |||
4252 | } | |||
4253 | ||||
4254 | // Warn on "sizeof(array op x)" and "sizeof(x op array)", where the array | |||
4255 | // decays into a pointer and returns an unintended result. This is most | |||
4256 | // likely a typo for "sizeof(array) op x". | |||
4257 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E->IgnoreParens())) { | |||
4258 | warnOnSizeofOnArrayDecay(*this, BO->getOperatorLoc(), BO->getType(), | |||
4259 | BO->getLHS()); | |||
4260 | warnOnSizeofOnArrayDecay(*this, BO->getOperatorLoc(), BO->getType(), | |||
4261 | BO->getRHS()); | |||
4262 | } | |||
4263 | } | |||
4264 | ||||
4265 | return false; | |||
4266 | } | |||
4267 | ||||
4268 | /// Check the constraints on operands to unary expression and type | |||
4269 | /// traits. | |||
4270 | /// | |||
4271 | /// This will complete any types necessary, and validate the various constraints | |||
4272 | /// on those operands. | |||
4273 | /// | |||
4274 | /// The UsualUnaryConversions() function is *not* called by this routine. | |||
4275 | /// C99 6.3.2.1p[2-4] all state: | |||
4276 | /// Except when it is the operand of the sizeof operator ... | |||
4277 | /// | |||
4278 | /// C++ [expr.sizeof]p4 | |||
4279 | /// The lvalue-to-rvalue, array-to-pointer, and function-to-pointer | |||
4280 | /// standard conversions are not applied to the operand of sizeof. | |||
4281 | /// | |||
4282 | /// This policy is followed for all of the unary trait expressions. | |||
4283 | bool Sema::CheckUnaryExprOrTypeTraitOperand(QualType ExprType, | |||
4284 | SourceLocation OpLoc, | |||
4285 | SourceRange ExprRange, | |||
4286 | UnaryExprOrTypeTrait ExprKind) { | |||
4287 | if (ExprType->isDependentType()) | |||
4288 | return false; | |||
4289 | ||||
4290 | // C++ [expr.sizeof]p2: | |||
4291 | // When applied to a reference or a reference type, the result | |||
4292 | // is the size of the referenced type. | |||
4293 | // C++11 [expr.alignof]p3: | |||
4294 | // When alignof is applied to a reference type, the result | |||
4295 | // shall be the alignment of the referenced type. | |||
4296 | if (const ReferenceType *Ref = ExprType->getAs<ReferenceType>()) | |||
4297 | ExprType = Ref->getPointeeType(); | |||
4298 | ||||
4299 | // C11 6.5.3.4/3, C++11 [expr.alignof]p3: | |||
4300 | // When alignof or _Alignof is applied to an array type, the result | |||
4301 | // is the alignment of the element type. | |||
4302 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf || | |||
4303 | ExprKind == UETT_OpenMPRequiredSimdAlign) | |||
4304 | ExprType = Context.getBaseElementType(ExprType); | |||
4305 | ||||
4306 | if (ExprKind == UETT_VecStep) | |||
4307 | return CheckVecStepTraitOperandType(*this, ExprType, OpLoc, ExprRange); | |||
4308 | ||||
4309 | // Explicitly list some types as extensions. | |||
4310 | if (!CheckExtensionTraitOperandType(*this, ExprType, OpLoc, ExprRange, | |||
4311 | ExprKind)) | |||
4312 | return false; | |||
4313 | ||||
4314 | if (RequireCompleteSizedType( | |||
4315 | OpLoc, ExprType, diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4316 | getTraitSpelling(ExprKind), ExprRange)) | |||
4317 | return true; | |||
4318 | ||||
4319 | if (ExprType->isFunctionType()) { | |||
4320 | Diag(OpLoc, diag::err_sizeof_alignof_function_type) | |||
4321 | << getTraitSpelling(ExprKind) << ExprRange; | |||
4322 | return true; | |||
4323 | } | |||
4324 | ||||
4325 | if (CheckObjCTraitOperandConstraints(*this, ExprType, OpLoc, ExprRange, | |||
4326 | ExprKind)) | |||
4327 | return true; | |||
4328 | ||||
4329 | return false; | |||
4330 | } | |||
4331 | ||||
4332 | static bool CheckAlignOfExpr(Sema &S, Expr *E, UnaryExprOrTypeTrait ExprKind) { | |||
4333 | // Cannot know anything else if the expression is dependent. | |||
4334 | if (E->isTypeDependent()) | |||
4335 | return false; | |||
4336 | ||||
4337 | if (E->getObjectKind() == OK_BitField) { | |||
4338 | S.Diag(E->getExprLoc(), diag::err_sizeof_alignof_typeof_bitfield) | |||
4339 | << 1 << E->getSourceRange(); | |||
4340 | return true; | |||
4341 | } | |||
4342 | ||||
4343 | ValueDecl *D = nullptr; | |||
4344 | Expr *Inner = E->IgnoreParens(); | |||
4345 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Inner)) { | |||
4346 | D = DRE->getDecl(); | |||
4347 | } else if (MemberExpr *ME = dyn_cast<MemberExpr>(Inner)) { | |||
4348 | D = ME->getMemberDecl(); | |||
4349 | } | |||
4350 | ||||
4351 | // If it's a field, require the containing struct to have a | |||
4352 | // complete definition so that we can compute the layout. | |||
4353 | // | |||
4354 | // This can happen in C++11 onwards, either by naming the member | |||
4355 | // in a way that is not transformed into a member access expression | |||
4356 | // (in an unevaluated operand, for instance), or by naming the member | |||
4357 | // in a trailing-return-type. | |||
4358 | // | |||
4359 | // For the record, since __alignof__ on expressions is a GCC | |||
4360 | // extension, GCC seems to permit this but always gives the | |||
4361 | // nonsensical answer 0. | |||
4362 | // | |||
4363 | // We don't really need the layout here --- we could instead just | |||
4364 | // directly check for all the appropriate alignment-lowing | |||
4365 | // attributes --- but that would require duplicating a lot of | |||
4366 | // logic that just isn't worth duplicating for such a marginal | |||
4367 | // use-case. | |||
4368 | if (FieldDecl *FD = dyn_cast_or_null<FieldDecl>(D)) { | |||
4369 | // Fast path this check, since we at least know the record has a | |||
4370 | // definition if we can find a member of it. | |||
4371 | if (!FD->getParent()->isCompleteDefinition()) { | |||
4372 | S.Diag(E->getExprLoc(), diag::err_alignof_member_of_incomplete_type) | |||
4373 | << E->getSourceRange(); | |||
4374 | return true; | |||
4375 | } | |||
4376 | ||||
4377 | // Otherwise, if it's a field, and the field doesn't have | |||
4378 | // reference type, then it must have a complete type (or be a | |||
4379 | // flexible array member, which we explicitly want to | |||
4380 | // white-list anyway), which makes the following checks trivial. | |||
4381 | if (!FD->getType()->isReferenceType()) | |||
4382 | return false; | |||
4383 | } | |||
4384 | ||||
4385 | return S.CheckUnaryExprOrTypeTraitOperand(E, ExprKind); | |||
4386 | } | |||
4387 | ||||
4388 | bool Sema::CheckVecStepExpr(Expr *E) { | |||
4389 | E = E->IgnoreParens(); | |||
4390 | ||||
4391 | // Cannot know anything else if the expression is dependent. | |||
4392 | if (E->isTypeDependent()) | |||
4393 | return false; | |||
4394 | ||||
4395 | return CheckUnaryExprOrTypeTraitOperand(E, UETT_VecStep); | |||
4396 | } | |||
4397 | ||||
4398 | static void captureVariablyModifiedType(ASTContext &Context, QualType T, | |||
4399 | CapturingScopeInfo *CSI) { | |||
4400 | assert(T->isVariablyModifiedType())(static_cast <bool> (T->isVariablyModifiedType()) ? void (0) : __assert_fail ("T->isVariablyModifiedType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4400, __extension__ __PRETTY_FUNCTION__)); | |||
4401 | assert(CSI != nullptr)(static_cast <bool> (CSI != nullptr) ? void (0) : __assert_fail ("CSI != nullptr", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4401, __extension__ __PRETTY_FUNCTION__)); | |||
4402 | ||||
4403 | // We're going to walk down into the type and look for VLA expressions. | |||
4404 | do { | |||
4405 | const Type *Ty = T.getTypePtr(); | |||
4406 | switch (Ty->getTypeClass()) { | |||
4407 | #define TYPE(Class, Base) | |||
4408 | #define ABSTRACT_TYPE(Class, Base) | |||
4409 | #define NON_CANONICAL_TYPE(Class, Base) | |||
4410 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: | |||
4411 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) | |||
4412 | #include "clang/AST/TypeNodes.inc" | |||
4413 | T = QualType(); | |||
4414 | break; | |||
4415 | // These types are never variably-modified. | |||
4416 | case Type::Builtin: | |||
4417 | case Type::Complex: | |||
4418 | case Type::Vector: | |||
4419 | case Type::ExtVector: | |||
4420 | case Type::ConstantMatrix: | |||
4421 | case Type::Record: | |||
4422 | case Type::Enum: | |||
4423 | case Type::Elaborated: | |||
4424 | case Type::TemplateSpecialization: | |||
4425 | case Type::ObjCObject: | |||
4426 | case Type::ObjCInterface: | |||
4427 | case Type::ObjCObjectPointer: | |||
4428 | case Type::ObjCTypeParam: | |||
4429 | case Type::Pipe: | |||
4430 | case Type::ExtInt: | |||
4431 | llvm_unreachable("type class is never variably-modified!")::llvm::llvm_unreachable_internal("type class is never variably-modified!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4431); | |||
4432 | case Type::Adjusted: | |||
4433 | T = cast<AdjustedType>(Ty)->getOriginalType(); | |||
4434 | break; | |||
4435 | case Type::Decayed: | |||
4436 | T = cast<DecayedType>(Ty)->getPointeeType(); | |||
4437 | break; | |||
4438 | case Type::Pointer: | |||
4439 | T = cast<PointerType>(Ty)->getPointeeType(); | |||
4440 | break; | |||
4441 | case Type::BlockPointer: | |||
4442 | T = cast<BlockPointerType>(Ty)->getPointeeType(); | |||
4443 | break; | |||
4444 | case Type::LValueReference: | |||
4445 | case Type::RValueReference: | |||
4446 | T = cast<ReferenceType>(Ty)->getPointeeType(); | |||
4447 | break; | |||
4448 | case Type::MemberPointer: | |||
4449 | T = cast<MemberPointerType>(Ty)->getPointeeType(); | |||
4450 | break; | |||
4451 | case Type::ConstantArray: | |||
4452 | case Type::IncompleteArray: | |||
4453 | // Losing element qualification here is fine. | |||
4454 | T = cast<ArrayType>(Ty)->getElementType(); | |||
4455 | break; | |||
4456 | case Type::VariableArray: { | |||
4457 | // Losing element qualification here is fine. | |||
4458 | const VariableArrayType *VAT = cast<VariableArrayType>(Ty); | |||
4459 | ||||
4460 | // Unknown size indication requires no size computation. | |||
4461 | // Otherwise, evaluate and record it. | |||
4462 | auto Size = VAT->getSizeExpr(); | |||
4463 | if (Size && !CSI->isVLATypeCaptured(VAT) && | |||
4464 | (isa<CapturedRegionScopeInfo>(CSI) || isa<LambdaScopeInfo>(CSI))) | |||
4465 | CSI->addVLATypeCapture(Size->getExprLoc(), VAT, Context.getSizeType()); | |||
4466 | ||||
4467 | T = VAT->getElementType(); | |||
4468 | break; | |||
4469 | } | |||
4470 | case Type::FunctionProto: | |||
4471 | case Type::FunctionNoProto: | |||
4472 | T = cast<FunctionType>(Ty)->getReturnType(); | |||
4473 | break; | |||
4474 | case Type::Paren: | |||
4475 | case Type::TypeOf: | |||
4476 | case Type::UnaryTransform: | |||
4477 | case Type::Attributed: | |||
4478 | case Type::SubstTemplateTypeParm: | |||
4479 | case Type::MacroQualified: | |||
4480 | // Keep walking after single level desugaring. | |||
4481 | T = T.getSingleStepDesugaredType(Context); | |||
4482 | break; | |||
4483 | case Type::Typedef: | |||
4484 | T = cast<TypedefType>(Ty)->desugar(); | |||
4485 | break; | |||
4486 | case Type::Decltype: | |||
4487 | T = cast<DecltypeType>(Ty)->desugar(); | |||
4488 | break; | |||
4489 | case Type::Auto: | |||
4490 | case Type::DeducedTemplateSpecialization: | |||
4491 | T = cast<DeducedType>(Ty)->getDeducedType(); | |||
4492 | break; | |||
4493 | case Type::TypeOfExpr: | |||
4494 | T = cast<TypeOfExprType>(Ty)->getUnderlyingExpr()->getType(); | |||
4495 | break; | |||
4496 | case Type::Atomic: | |||
4497 | T = cast<AtomicType>(Ty)->getValueType(); | |||
4498 | break; | |||
4499 | } | |||
4500 | } while (!T.isNull() && T->isVariablyModifiedType()); | |||
4501 | } | |||
4502 | ||||
4503 | /// Build a sizeof or alignof expression given a type operand. | |||
4504 | ExprResult | |||
4505 | Sema::CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, | |||
4506 | SourceLocation OpLoc, | |||
4507 | UnaryExprOrTypeTrait ExprKind, | |||
4508 | SourceRange R) { | |||
4509 | if (!TInfo) | |||
4510 | return ExprError(); | |||
4511 | ||||
4512 | QualType T = TInfo->getType(); | |||
4513 | ||||
4514 | if (!T->isDependentType() && | |||
4515 | CheckUnaryExprOrTypeTraitOperand(T, OpLoc, R, ExprKind)) | |||
4516 | return ExprError(); | |||
4517 | ||||
4518 | if (T->isVariablyModifiedType() && FunctionScopes.size() > 1) { | |||
4519 | if (auto *TT = T->getAs<TypedefType>()) { | |||
4520 | for (auto I = FunctionScopes.rbegin(), | |||
4521 | E = std::prev(FunctionScopes.rend()); | |||
4522 | I != E; ++I) { | |||
4523 | auto *CSI = dyn_cast<CapturingScopeInfo>(*I); | |||
4524 | if (CSI == nullptr) | |||
4525 | break; | |||
4526 | DeclContext *DC = nullptr; | |||
4527 | if (auto *LSI = dyn_cast<LambdaScopeInfo>(CSI)) | |||
4528 | DC = LSI->CallOperator; | |||
4529 | else if (auto *CRSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) | |||
4530 | DC = CRSI->TheCapturedDecl; | |||
4531 | else if (auto *BSI = dyn_cast<BlockScopeInfo>(CSI)) | |||
4532 | DC = BSI->TheDecl; | |||
4533 | if (DC) { | |||
4534 | if (DC->containsDecl(TT->getDecl())) | |||
4535 | break; | |||
4536 | captureVariablyModifiedType(Context, T, CSI); | |||
4537 | } | |||
4538 | } | |||
4539 | } | |||
4540 | } | |||
4541 | ||||
4542 | // C99 6.5.3.4p4: the type (an unsigned integer type) is size_t. | |||
4543 | return new (Context) UnaryExprOrTypeTraitExpr( | |||
4544 | ExprKind, TInfo, Context.getSizeType(), OpLoc, R.getEnd()); | |||
4545 | } | |||
4546 | ||||
4547 | /// Build a sizeof or alignof expression given an expression | |||
4548 | /// operand. | |||
4549 | ExprResult | |||
4550 | Sema::CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, | |||
4551 | UnaryExprOrTypeTrait ExprKind) { | |||
4552 | ExprResult PE = CheckPlaceholderExpr(E); | |||
4553 | if (PE.isInvalid()) | |||
4554 | return ExprError(); | |||
4555 | ||||
4556 | E = PE.get(); | |||
4557 | ||||
4558 | // Verify that the operand is valid. | |||
4559 | bool isInvalid = false; | |||
4560 | if (E->isTypeDependent()) { | |||
4561 | // Delay type-checking for type-dependent expressions. | |||
4562 | } else if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
4563 | isInvalid = CheckAlignOfExpr(*this, E, ExprKind); | |||
4564 | } else if (ExprKind == UETT_VecStep) { | |||
4565 | isInvalid = CheckVecStepExpr(E); | |||
4566 | } else if (ExprKind == UETT_OpenMPRequiredSimdAlign) { | |||
4567 | Diag(E->getExprLoc(), diag::err_openmp_default_simd_align_expr); | |||
4568 | isInvalid = true; | |||
4569 | } else if (E->refersToBitField()) { // C99 6.5.3.4p1. | |||
4570 | Diag(E->getExprLoc(), diag::err_sizeof_alignof_typeof_bitfield) << 0; | |||
4571 | isInvalid = true; | |||
4572 | } else { | |||
4573 | isInvalid = CheckUnaryExprOrTypeTraitOperand(E, UETT_SizeOf); | |||
4574 | } | |||
4575 | ||||
4576 | if (isInvalid) | |||
4577 | return ExprError(); | |||
4578 | ||||
4579 | if (ExprKind == UETT_SizeOf && E->getType()->isVariableArrayType()) { | |||
4580 | PE = TransformToPotentiallyEvaluated(E); | |||
4581 | if (PE.isInvalid()) return ExprError(); | |||
4582 | E = PE.get(); | |||
4583 | } | |||
4584 | ||||
4585 | // C99 6.5.3.4p4: the type (an unsigned integer type) is size_t. | |||
4586 | return new (Context) UnaryExprOrTypeTraitExpr( | |||
4587 | ExprKind, E, Context.getSizeType(), OpLoc, E->getSourceRange().getEnd()); | |||
4588 | } | |||
4589 | ||||
4590 | /// ActOnUnaryExprOrTypeTraitExpr - Handle @c sizeof(type) and @c sizeof @c | |||
4591 | /// expr and the same for @c alignof and @c __alignof | |||
4592 | /// Note that the ArgRange is invalid if isType is false. | |||
4593 | ExprResult | |||
4594 | Sema::ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, | |||
4595 | UnaryExprOrTypeTrait ExprKind, bool IsType, | |||
4596 | void *TyOrEx, SourceRange ArgRange) { | |||
4597 | // If error parsing type, ignore. | |||
4598 | if (!TyOrEx) return ExprError(); | |||
4599 | ||||
4600 | if (IsType) { | |||
4601 | TypeSourceInfo *TInfo; | |||
4602 | (void) GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrEx), &TInfo); | |||
4603 | return CreateUnaryExprOrTypeTraitExpr(TInfo, OpLoc, ExprKind, ArgRange); | |||
4604 | } | |||
4605 | ||||
4606 | Expr *ArgEx = (Expr *)TyOrEx; | |||
4607 | ExprResult Result = CreateUnaryExprOrTypeTraitExpr(ArgEx, OpLoc, ExprKind); | |||
4608 | return Result; | |||
4609 | } | |||
4610 | ||||
4611 | static QualType CheckRealImagOperand(Sema &S, ExprResult &V, SourceLocation Loc, | |||
4612 | bool IsReal) { | |||
4613 | if (V.get()->isTypeDependent()) | |||
4614 | return S.Context.DependentTy; | |||
4615 | ||||
4616 | // _Real and _Imag are only l-values for normal l-values. | |||
4617 | if (V.get()->getObjectKind() != OK_Ordinary) { | |||
4618 | V = S.DefaultLvalueConversion(V.get()); | |||
4619 | if (V.isInvalid()) | |||
4620 | return QualType(); | |||
4621 | } | |||
4622 | ||||
4623 | // These operators return the element type of a complex type. | |||
4624 | if (const ComplexType *CT = V.get()->getType()->getAs<ComplexType>()) | |||
4625 | return CT->getElementType(); | |||
4626 | ||||
4627 | // Otherwise they pass through real integer and floating point types here. | |||
4628 | if (V.get()->getType()->isArithmeticType()) | |||
4629 | return V.get()->getType(); | |||
4630 | ||||
4631 | // Test for placeholders. | |||
4632 | ExprResult PR = S.CheckPlaceholderExpr(V.get()); | |||
4633 | if (PR.isInvalid()) return QualType(); | |||
4634 | if (PR.get() != V.get()) { | |||
4635 | V = PR; | |||
4636 | return CheckRealImagOperand(S, V, Loc, IsReal); | |||
4637 | } | |||
4638 | ||||
4639 | // Reject anything else. | |||
4640 | S.Diag(Loc, diag::err_realimag_invalid_type) << V.get()->getType() | |||
4641 | << (IsReal ? "__real" : "__imag"); | |||
4642 | return QualType(); | |||
4643 | } | |||
4644 | ||||
4645 | ||||
4646 | ||||
4647 | ExprResult | |||
4648 | Sema::ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, | |||
4649 | tok::TokenKind Kind, Expr *Input) { | |||
4650 | UnaryOperatorKind Opc; | |||
4651 | switch (Kind) { | |||
4652 | default: llvm_unreachable("Unknown unary op!")::llvm::llvm_unreachable_internal("Unknown unary op!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4652); | |||
4653 | case tok::plusplus: Opc = UO_PostInc; break; | |||
4654 | case tok::minusminus: Opc = UO_PostDec; break; | |||
4655 | } | |||
4656 | ||||
4657 | // Since this might is a postfix expression, get rid of ParenListExprs. | |||
4658 | ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Input); | |||
4659 | if (Result.isInvalid()) return ExprError(); | |||
4660 | Input = Result.get(); | |||
4661 | ||||
4662 | return BuildUnaryOp(S, OpLoc, Opc, Input); | |||
4663 | } | |||
4664 | ||||
4665 | /// Diagnose if arithmetic on the given ObjC pointer is illegal. | |||
4666 | /// | |||
4667 | /// \return true on error | |||
4668 | static bool checkArithmeticOnObjCPointer(Sema &S, | |||
4669 | SourceLocation opLoc, | |||
4670 | Expr *op) { | |||
4671 | assert(op->getType()->isObjCObjectPointerType())(static_cast <bool> (op->getType()->isObjCObjectPointerType ()) ? void (0) : __assert_fail ("op->getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4671, __extension__ __PRETTY_FUNCTION__)); | |||
4672 | if (S.LangOpts.ObjCRuntime.allowsPointerArithmetic() && | |||
4673 | !S.LangOpts.ObjCSubscriptingLegacyRuntime) | |||
4674 | return false; | |||
4675 | ||||
4676 | S.Diag(opLoc, diag::err_arithmetic_nonfragile_interface) | |||
4677 | << op->getType()->castAs<ObjCObjectPointerType>()->getPointeeType() | |||
4678 | << op->getSourceRange(); | |||
4679 | return true; | |||
4680 | } | |||
4681 | ||||
4682 | static bool isMSPropertySubscriptExpr(Sema &S, Expr *Base) { | |||
4683 | auto *BaseNoParens = Base->IgnoreParens(); | |||
4684 | if (auto *MSProp = dyn_cast<MSPropertyRefExpr>(BaseNoParens)) | |||
4685 | return MSProp->getPropertyDecl()->getType()->isArrayType(); | |||
4686 | return isa<MSPropertySubscriptExpr>(BaseNoParens); | |||
4687 | } | |||
4688 | ||||
4689 | ExprResult | |||
4690 | Sema::ActOnArraySubscriptExpr(Scope *S, Expr *base, SourceLocation lbLoc, | |||
4691 | Expr *idx, SourceLocation rbLoc) { | |||
4692 | if (base && !base->getType().isNull() && | |||
4693 | base->getType()->isSpecificPlaceholderType(BuiltinType::OMPArraySection)) | |||
4694 | return ActOnOMPArraySectionExpr(base, lbLoc, idx, SourceLocation(), | |||
4695 | SourceLocation(), /*Length*/ nullptr, | |||
4696 | /*Stride=*/nullptr, rbLoc); | |||
4697 | ||||
4698 | // Since this might be a postfix expression, get rid of ParenListExprs. | |||
4699 | if (isa<ParenListExpr>(base)) { | |||
4700 | ExprResult result = MaybeConvertParenListExprToParenExpr(S, base); | |||
4701 | if (result.isInvalid()) return ExprError(); | |||
4702 | base = result.get(); | |||
4703 | } | |||
4704 | ||||
4705 | // Check if base and idx form a MatrixSubscriptExpr. | |||
4706 | // | |||
4707 | // Helper to check for comma expressions, which are not allowed as indices for | |||
4708 | // matrix subscript expressions. | |||
4709 | auto CheckAndReportCommaError = [this, base, rbLoc](Expr *E) { | |||
4710 | if (isa<BinaryOperator>(E) && cast<BinaryOperator>(E)->isCommaOp()) { | |||
4711 | Diag(E->getExprLoc(), diag::err_matrix_subscript_comma) | |||
4712 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4713 | return true; | |||
4714 | } | |||
4715 | return false; | |||
4716 | }; | |||
4717 | // The matrix subscript operator ([][])is considered a single operator. | |||
4718 | // Separating the index expressions by parenthesis is not allowed. | |||
4719 | if (base->getType()->isSpecificPlaceholderType( | |||
4720 | BuiltinType::IncompleteMatrixIdx) && | |||
4721 | !isa<MatrixSubscriptExpr>(base)) { | |||
4722 | Diag(base->getExprLoc(), diag::err_matrix_separate_incomplete_index) | |||
4723 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4724 | return ExprError(); | |||
4725 | } | |||
4726 | // If the base is a MatrixSubscriptExpr, try to create a new | |||
4727 | // MatrixSubscriptExpr. | |||
4728 | auto *matSubscriptE = dyn_cast<MatrixSubscriptExpr>(base); | |||
4729 | if (matSubscriptE) { | |||
4730 | if (CheckAndReportCommaError(idx)) | |||
4731 | return ExprError(); | |||
4732 | ||||
4733 | assert(matSubscriptE->isIncomplete() &&(static_cast <bool> (matSubscriptE->isIncomplete() && "base has to be an incomplete matrix subscript") ? void (0) : __assert_fail ("matSubscriptE->isIncomplete() && \"base has to be an incomplete matrix subscript\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4734, __extension__ __PRETTY_FUNCTION__)) | |||
4734 | "base has to be an incomplete matrix subscript")(static_cast <bool> (matSubscriptE->isIncomplete() && "base has to be an incomplete matrix subscript") ? void (0) : __assert_fail ("matSubscriptE->isIncomplete() && \"base has to be an incomplete matrix subscript\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4734, __extension__ __PRETTY_FUNCTION__)); | |||
4735 | return CreateBuiltinMatrixSubscriptExpr( | |||
4736 | matSubscriptE->getBase(), matSubscriptE->getRowIdx(), idx, rbLoc); | |||
4737 | } | |||
4738 | ||||
4739 | // Handle any non-overload placeholder types in the base and index | |||
4740 | // expressions. We can't handle overloads here because the other | |||
4741 | // operand might be an overloadable type, in which case the overload | |||
4742 | // resolution for the operator overload should get the first crack | |||
4743 | // at the overload. | |||
4744 | bool IsMSPropertySubscript = false; | |||
4745 | if (base->getType()->isNonOverloadPlaceholderType()) { | |||
4746 | IsMSPropertySubscript = isMSPropertySubscriptExpr(*this, base); | |||
4747 | if (!IsMSPropertySubscript) { | |||
4748 | ExprResult result = CheckPlaceholderExpr(base); | |||
4749 | if (result.isInvalid()) | |||
4750 | return ExprError(); | |||
4751 | base = result.get(); | |||
4752 | } | |||
4753 | } | |||
4754 | ||||
4755 | // If the base is a matrix type, try to create a new MatrixSubscriptExpr. | |||
4756 | if (base->getType()->isMatrixType()) { | |||
4757 | if (CheckAndReportCommaError(idx)) | |||
4758 | return ExprError(); | |||
4759 | ||||
4760 | return CreateBuiltinMatrixSubscriptExpr(base, idx, nullptr, rbLoc); | |||
4761 | } | |||
4762 | ||||
4763 | // A comma-expression as the index is deprecated in C++2a onwards. | |||
4764 | if (getLangOpts().CPlusPlus20 && | |||
4765 | ((isa<BinaryOperator>(idx) && cast<BinaryOperator>(idx)->isCommaOp()) || | |||
4766 | (isa<CXXOperatorCallExpr>(idx) && | |||
4767 | cast<CXXOperatorCallExpr>(idx)->getOperator() == OO_Comma))) { | |||
4768 | Diag(idx->getExprLoc(), diag::warn_deprecated_comma_subscript) | |||
4769 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4770 | } | |||
4771 | ||||
4772 | if (idx->getType()->isNonOverloadPlaceholderType()) { | |||
4773 | ExprResult result = CheckPlaceholderExpr(idx); | |||
4774 | if (result.isInvalid()) return ExprError(); | |||
4775 | idx = result.get(); | |||
4776 | } | |||
4777 | ||||
4778 | // Build an unanalyzed expression if either operand is type-dependent. | |||
4779 | if (getLangOpts().CPlusPlus && | |||
4780 | (base->isTypeDependent() || idx->isTypeDependent())) { | |||
4781 | return new (Context) ArraySubscriptExpr(base, idx, Context.DependentTy, | |||
4782 | VK_LValue, OK_Ordinary, rbLoc); | |||
4783 | } | |||
4784 | ||||
4785 | // MSDN, property (C++) | |||
4786 | // https://msdn.microsoft.com/en-us/library/yhfk0thd(v=vs.120).aspx | |||
4787 | // This attribute can also be used in the declaration of an empty array in a | |||
4788 | // class or structure definition. For example: | |||
4789 | // __declspec(property(get=GetX, put=PutX)) int x[]; | |||
4790 | // The above statement indicates that x[] can be used with one or more array | |||
4791 | // indices. In this case, i=p->x[a][b] will be turned into i=p->GetX(a, b), | |||
4792 | // and p->x[a][b] = i will be turned into p->PutX(a, b, i); | |||
4793 | if (IsMSPropertySubscript) { | |||
4794 | // Build MS property subscript expression if base is MS property reference | |||
4795 | // or MS property subscript. | |||
4796 | return new (Context) MSPropertySubscriptExpr( | |||
4797 | base, idx, Context.PseudoObjectTy, VK_LValue, OK_Ordinary, rbLoc); | |||
4798 | } | |||
4799 | ||||
4800 | // Use C++ overloaded-operator rules if either operand has record | |||
4801 | // type. The spec says to do this if either type is *overloadable*, | |||
4802 | // but enum types can't declare subscript operators or conversion | |||
4803 | // operators, so there's nothing interesting for overload resolution | |||
4804 | // to do if there aren't any record types involved. | |||
4805 | // | |||
4806 | // ObjC pointers have their own subscripting logic that is not tied | |||
4807 | // to overload resolution and so should not take this path. | |||
4808 | if (getLangOpts().CPlusPlus && | |||
4809 | (base->getType()->isRecordType() || | |||
4810 | (!base->getType()->isObjCObjectPointerType() && | |||
4811 | idx->getType()->isRecordType()))) { | |||
4812 | return CreateOverloadedArraySubscriptExpr(lbLoc, rbLoc, base, idx); | |||
4813 | } | |||
4814 | ||||
4815 | ExprResult Res = CreateBuiltinArraySubscriptExpr(base, lbLoc, idx, rbLoc); | |||
4816 | ||||
4817 | if (!Res.isInvalid() && isa<ArraySubscriptExpr>(Res.get())) | |||
4818 | CheckSubscriptAccessOfNoDeref(cast<ArraySubscriptExpr>(Res.get())); | |||
4819 | ||||
4820 | return Res; | |||
4821 | } | |||
4822 | ||||
4823 | ExprResult Sema::tryConvertExprToType(Expr *E, QualType Ty) { | |||
4824 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(Ty); | |||
4825 | InitializationKind Kind = | |||
4826 | InitializationKind::CreateCopy(E->getBeginLoc(), SourceLocation()); | |||
4827 | InitializationSequence InitSeq(*this, Entity, Kind, E); | |||
4828 | return InitSeq.Perform(*this, Entity, Kind, E); | |||
4829 | } | |||
4830 | ||||
4831 | ExprResult Sema::CreateBuiltinMatrixSubscriptExpr(Expr *Base, Expr *RowIdx, | |||
4832 | Expr *ColumnIdx, | |||
4833 | SourceLocation RBLoc) { | |||
4834 | ExprResult BaseR = CheckPlaceholderExpr(Base); | |||
4835 | if (BaseR.isInvalid()) | |||
4836 | return BaseR; | |||
4837 | Base = BaseR.get(); | |||
4838 | ||||
4839 | ExprResult RowR = CheckPlaceholderExpr(RowIdx); | |||
4840 | if (RowR.isInvalid()) | |||
4841 | return RowR; | |||
4842 | RowIdx = RowR.get(); | |||
4843 | ||||
4844 | if (!ColumnIdx) | |||
4845 | return new (Context) MatrixSubscriptExpr( | |||
4846 | Base, RowIdx, ColumnIdx, Context.IncompleteMatrixIdxTy, RBLoc); | |||
4847 | ||||
4848 | // Build an unanalyzed expression if any of the operands is type-dependent. | |||
4849 | if (Base->isTypeDependent() || RowIdx->isTypeDependent() || | |||
4850 | ColumnIdx->isTypeDependent()) | |||
4851 | return new (Context) MatrixSubscriptExpr(Base, RowIdx, ColumnIdx, | |||
4852 | Context.DependentTy, RBLoc); | |||
4853 | ||||
4854 | ExprResult ColumnR = CheckPlaceholderExpr(ColumnIdx); | |||
4855 | if (ColumnR.isInvalid()) | |||
4856 | return ColumnR; | |||
4857 | ColumnIdx = ColumnR.get(); | |||
4858 | ||||
4859 | // Check that IndexExpr is an integer expression. If it is a constant | |||
4860 | // expression, check that it is less than Dim (= the number of elements in the | |||
4861 | // corresponding dimension). | |||
4862 | auto IsIndexValid = [&](Expr *IndexExpr, unsigned Dim, | |||
4863 | bool IsColumnIdx) -> Expr * { | |||
4864 | if (!IndexExpr->getType()->isIntegerType() && | |||
4865 | !IndexExpr->isTypeDependent()) { | |||
4866 | Diag(IndexExpr->getBeginLoc(), diag::err_matrix_index_not_integer) | |||
4867 | << IsColumnIdx; | |||
4868 | return nullptr; | |||
4869 | } | |||
4870 | ||||
4871 | if (Optional<llvm::APSInt> Idx = | |||
4872 | IndexExpr->getIntegerConstantExpr(Context)) { | |||
4873 | if ((*Idx < 0 || *Idx >= Dim)) { | |||
4874 | Diag(IndexExpr->getBeginLoc(), diag::err_matrix_index_outside_range) | |||
4875 | << IsColumnIdx << Dim; | |||
4876 | return nullptr; | |||
4877 | } | |||
4878 | } | |||
4879 | ||||
4880 | ExprResult ConvExpr = | |||
4881 | tryConvertExprToType(IndexExpr, Context.getSizeType()); | |||
4882 | assert(!ConvExpr.isInvalid() &&(static_cast <bool> (!ConvExpr.isInvalid() && "should be able to convert any integer type to size type" ) ? void (0) : __assert_fail ("!ConvExpr.isInvalid() && \"should be able to convert any integer type to size type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4883, __extension__ __PRETTY_FUNCTION__)) | |||
4883 | "should be able to convert any integer type to size type")(static_cast <bool> (!ConvExpr.isInvalid() && "should be able to convert any integer type to size type" ) ? void (0) : __assert_fail ("!ConvExpr.isInvalid() && \"should be able to convert any integer type to size type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 4883, __extension__ __PRETTY_FUNCTION__)); | |||
4884 | return ConvExpr.get(); | |||
4885 | }; | |||
4886 | ||||
4887 | auto *MTy = Base->getType()->getAs<ConstantMatrixType>(); | |||
4888 | RowIdx = IsIndexValid(RowIdx, MTy->getNumRows(), false); | |||
4889 | ColumnIdx = IsIndexValid(ColumnIdx, MTy->getNumColumns(), true); | |||
4890 | if (!RowIdx || !ColumnIdx) | |||
4891 | return ExprError(); | |||
4892 | ||||
4893 | return new (Context) MatrixSubscriptExpr(Base, RowIdx, ColumnIdx, | |||
4894 | MTy->getElementType(), RBLoc); | |||
4895 | } | |||
4896 | ||||
4897 | void Sema::CheckAddressOfNoDeref(const Expr *E) { | |||
4898 | ExpressionEvaluationContextRecord &LastRecord = ExprEvalContexts.back(); | |||
4899 | const Expr *StrippedExpr = E->IgnoreParenImpCasts(); | |||
4900 | ||||
4901 | // For expressions like `&(*s).b`, the base is recorded and what should be | |||
4902 | // checked. | |||
4903 | const MemberExpr *Member = nullptr; | |||
4904 | while ((Member = dyn_cast<MemberExpr>(StrippedExpr)) && !Member->isArrow()) | |||
4905 | StrippedExpr = Member->getBase()->IgnoreParenImpCasts(); | |||
4906 | ||||
4907 | LastRecord.PossibleDerefs.erase(StrippedExpr); | |||
4908 | } | |||
4909 | ||||
4910 | void Sema::CheckSubscriptAccessOfNoDeref(const ArraySubscriptExpr *E) { | |||
4911 | if (isUnevaluatedContext()) | |||
4912 | return; | |||
4913 | ||||
4914 | QualType ResultTy = E->getType(); | |||
4915 | ExpressionEvaluationContextRecord &LastRecord = ExprEvalContexts.back(); | |||
4916 | ||||
4917 | // Bail if the element is an array since it is not memory access. | |||
4918 | if (isa<ArrayType>(ResultTy)) | |||
4919 | return; | |||
4920 | ||||
4921 | if (ResultTy->hasAttr(attr::NoDeref)) { | |||
4922 | LastRecord.PossibleDerefs.insert(E); | |||
4923 | return; | |||
4924 | } | |||
4925 | ||||
4926 | // Check if the base type is a pointer to a member access of a struct | |||
4927 | // marked with noderef. | |||
4928 | const Expr *Base = E->getBase(); | |||
4929 | QualType BaseTy = Base->getType(); | |||
4930 | if (!(isa<ArrayType>(BaseTy) || isa<PointerType>(BaseTy))) | |||
4931 | // Not a pointer access | |||
4932 | return; | |||
4933 | ||||
4934 | const MemberExpr *Member = nullptr; | |||
4935 | while ((Member = dyn_cast<MemberExpr>(Base->IgnoreParenCasts())) && | |||
4936 | Member->isArrow()) | |||
4937 | Base = Member->getBase(); | |||
4938 | ||||
4939 | if (const auto *Ptr = dyn_cast<PointerType>(Base->getType())) { | |||
4940 | if (Ptr->getPointeeType()->hasAttr(attr::NoDeref)) | |||
4941 | LastRecord.PossibleDerefs.insert(E); | |||
4942 | } | |||
4943 | } | |||
4944 | ||||
4945 | ExprResult Sema::ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc, | |||
4946 | Expr *LowerBound, | |||
4947 | SourceLocation ColonLocFirst, | |||
4948 | SourceLocation ColonLocSecond, | |||
4949 | Expr *Length, Expr *Stride, | |||
4950 | SourceLocation RBLoc) { | |||
4951 | if (Base->getType()->isPlaceholderType() && | |||
4952 | !Base->getType()->isSpecificPlaceholderType( | |||
4953 | BuiltinType::OMPArraySection)) { | |||
4954 | ExprResult Result = CheckPlaceholderExpr(Base); | |||
4955 | if (Result.isInvalid()) | |||
4956 | return ExprError(); | |||
4957 | Base = Result.get(); | |||
4958 | } | |||
4959 | if (LowerBound && LowerBound->getType()->isNonOverloadPlaceholderType()) { | |||
4960 | ExprResult Result = CheckPlaceholderExpr(LowerBound); | |||
4961 | if (Result.isInvalid()) | |||
4962 | return ExprError(); | |||
4963 | Result = DefaultLvalueConversion(Result.get()); | |||
4964 | if (Result.isInvalid()) | |||
4965 | return ExprError(); | |||
4966 | LowerBound = Result.get(); | |||
4967 | } | |||
4968 | if (Length && Length->getType()->isNonOverloadPlaceholderType()) { | |||
4969 | ExprResult Result = CheckPlaceholderExpr(Length); | |||
4970 | if (Result.isInvalid()) | |||
4971 | return ExprError(); | |||
4972 | Result = DefaultLvalueConversion(Result.get()); | |||
4973 | if (Result.isInvalid()) | |||
4974 | return ExprError(); | |||
4975 | Length = Result.get(); | |||
4976 | } | |||
4977 | if (Stride && Stride->getType()->isNonOverloadPlaceholderType()) { | |||
4978 | ExprResult Result = CheckPlaceholderExpr(Stride); | |||
4979 | if (Result.isInvalid()) | |||
4980 | return ExprError(); | |||
4981 | Result = DefaultLvalueConversion(Result.get()); | |||
4982 | if (Result.isInvalid()) | |||
4983 | return ExprError(); | |||
4984 | Stride = Result.get(); | |||
4985 | } | |||
4986 | ||||
4987 | // Build an unanalyzed expression if either operand is type-dependent. | |||
4988 | if (Base->isTypeDependent() || | |||
4989 | (LowerBound && | |||
4990 | (LowerBound->isTypeDependent() || LowerBound->isValueDependent())) || | |||
4991 | (Length && (Length->isTypeDependent() || Length->isValueDependent())) || | |||
4992 | (Stride && (Stride->isTypeDependent() || Stride->isValueDependent()))) { | |||
4993 | return new (Context) OMPArraySectionExpr( | |||
4994 | Base, LowerBound, Length, Stride, Context.DependentTy, VK_LValue, | |||
4995 | OK_Ordinary, ColonLocFirst, ColonLocSecond, RBLoc); | |||
4996 | } | |||
4997 | ||||
4998 | // Perform default conversions. | |||
4999 | QualType OriginalTy = OMPArraySectionExpr::getBaseOriginalType(Base); | |||
5000 | QualType ResultTy; | |||
5001 | if (OriginalTy->isAnyPointerType()) { | |||
5002 | ResultTy = OriginalTy->getPointeeType(); | |||
5003 | } else if (OriginalTy->isArrayType()) { | |||
5004 | ResultTy = OriginalTy->getAsArrayTypeUnsafe()->getElementType(); | |||
5005 | } else { | |||
5006 | return ExprError( | |||
5007 | Diag(Base->getExprLoc(), diag::err_omp_typecheck_section_value) | |||
5008 | << Base->getSourceRange()); | |||
5009 | } | |||
5010 | // C99 6.5.2.1p1 | |||
5011 | if (LowerBound) { | |||
5012 | auto Res = PerformOpenMPImplicitIntegerConversion(LowerBound->getExprLoc(), | |||
5013 | LowerBound); | |||
5014 | if (Res.isInvalid()) | |||
5015 | return ExprError(Diag(LowerBound->getExprLoc(), | |||
5016 | diag::err_omp_typecheck_section_not_integer) | |||
5017 | << 0 << LowerBound->getSourceRange()); | |||
5018 | LowerBound = Res.get(); | |||
5019 | ||||
5020 | if (LowerBound->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5021 | LowerBound->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5022 | Diag(LowerBound->getExprLoc(), diag::warn_omp_section_is_char) | |||
5023 | << 0 << LowerBound->getSourceRange(); | |||
5024 | } | |||
5025 | if (Length) { | |||
5026 | auto Res = | |||
5027 | PerformOpenMPImplicitIntegerConversion(Length->getExprLoc(), Length); | |||
5028 | if (Res.isInvalid()) | |||
5029 | return ExprError(Diag(Length->getExprLoc(), | |||
5030 | diag::err_omp_typecheck_section_not_integer) | |||
5031 | << 1 << Length->getSourceRange()); | |||
5032 | Length = Res.get(); | |||
5033 | ||||
5034 | if (Length->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5035 | Length->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5036 | Diag(Length->getExprLoc(), diag::warn_omp_section_is_char) | |||
5037 | << 1 << Length->getSourceRange(); | |||
5038 | } | |||
5039 | if (Stride) { | |||
5040 | ExprResult Res = | |||
5041 | PerformOpenMPImplicitIntegerConversion(Stride->getExprLoc(), Stride); | |||
5042 | if (Res.isInvalid()) | |||
5043 | return ExprError(Diag(Stride->getExprLoc(), | |||
5044 | diag::err_omp_typecheck_section_not_integer) | |||
5045 | << 1 << Stride->getSourceRange()); | |||
5046 | Stride = Res.get(); | |||
5047 | ||||
5048 | if (Stride->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5049 | Stride->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5050 | Diag(Stride->getExprLoc(), diag::warn_omp_section_is_char) | |||
5051 | << 1 << Stride->getSourceRange(); | |||
5052 | } | |||
5053 | ||||
5054 | // C99 6.5.2.1p1: "shall have type "pointer to *object* type". Similarly, | |||
5055 | // C++ [expr.sub]p1: The type "T" shall be a completely-defined object | |||
5056 | // type. Note that functions are not objects, and that (in C99 parlance) | |||
5057 | // incomplete types are not object types. | |||
5058 | if (ResultTy->isFunctionType()) { | |||
5059 | Diag(Base->getExprLoc(), diag::err_omp_section_function_type) | |||
5060 | << ResultTy << Base->getSourceRange(); | |||
5061 | return ExprError(); | |||
5062 | } | |||
5063 | ||||
5064 | if (RequireCompleteType(Base->getExprLoc(), ResultTy, | |||
5065 | diag::err_omp_section_incomplete_type, Base)) | |||
5066 | return ExprError(); | |||
5067 | ||||
5068 | if (LowerBound && !OriginalTy->isAnyPointerType()) { | |||
5069 | Expr::EvalResult Result; | |||
5070 | if (LowerBound->EvaluateAsInt(Result, Context)) { | |||
5071 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5072 | // The array section must be a subset of the original array. | |||
5073 | llvm::APSInt LowerBoundValue = Result.Val.getInt(); | |||
5074 | if (LowerBoundValue.isNegative()) { | |||
5075 | Diag(LowerBound->getExprLoc(), diag::err_omp_section_not_subset_of_array) | |||
5076 | << LowerBound->getSourceRange(); | |||
5077 | return ExprError(); | |||
5078 | } | |||
5079 | } | |||
5080 | } | |||
5081 | ||||
5082 | if (Length) { | |||
5083 | Expr::EvalResult Result; | |||
5084 | if (Length->EvaluateAsInt(Result, Context)) { | |||
5085 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5086 | // The length must evaluate to non-negative integers. | |||
5087 | llvm::APSInt LengthValue = Result.Val.getInt(); | |||
5088 | if (LengthValue.isNegative()) { | |||
5089 | Diag(Length->getExprLoc(), diag::err_omp_section_length_negative) | |||
5090 | << toString(LengthValue, /*Radix=*/10, /*Signed=*/true) | |||
5091 | << Length->getSourceRange(); | |||
5092 | return ExprError(); | |||
5093 | } | |||
5094 | } | |||
5095 | } else if (ColonLocFirst.isValid() && | |||
5096 | (OriginalTy.isNull() || (!OriginalTy->isConstantArrayType() && | |||
5097 | !OriginalTy->isVariableArrayType()))) { | |||
5098 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5099 | // When the size of the array dimension is not known, the length must be | |||
5100 | // specified explicitly. | |||
5101 | Diag(ColonLocFirst, diag::err_omp_section_length_undefined) | |||
5102 | << (!OriginalTy.isNull() && OriginalTy->isArrayType()); | |||
5103 | return ExprError(); | |||
5104 | } | |||
5105 | ||||
5106 | if (Stride) { | |||
5107 | Expr::EvalResult Result; | |||
5108 | if (Stride->EvaluateAsInt(Result, Context)) { | |||
5109 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5110 | // The stride must evaluate to a positive integer. | |||
5111 | llvm::APSInt StrideValue = Result.Val.getInt(); | |||
5112 | if (!StrideValue.isStrictlyPositive()) { | |||
5113 | Diag(Stride->getExprLoc(), diag::err_omp_section_stride_non_positive) | |||
5114 | << toString(StrideValue, /*Radix=*/10, /*Signed=*/true) | |||
5115 | << Stride->getSourceRange(); | |||
5116 | return ExprError(); | |||
5117 | } | |||
5118 | } | |||
5119 | } | |||
5120 | ||||
5121 | if (!Base->getType()->isSpecificPlaceholderType( | |||
5122 | BuiltinType::OMPArraySection)) { | |||
5123 | ExprResult Result = DefaultFunctionArrayLvalueConversion(Base); | |||
5124 | if (Result.isInvalid()) | |||
5125 | return ExprError(); | |||
5126 | Base = Result.get(); | |||
5127 | } | |||
5128 | return new (Context) OMPArraySectionExpr( | |||
5129 | Base, LowerBound, Length, Stride, Context.OMPArraySectionTy, VK_LValue, | |||
5130 | OK_Ordinary, ColonLocFirst, ColonLocSecond, RBLoc); | |||
5131 | } | |||
5132 | ||||
5133 | ExprResult Sema::ActOnOMPArrayShapingExpr(Expr *Base, SourceLocation LParenLoc, | |||
5134 | SourceLocation RParenLoc, | |||
5135 | ArrayRef<Expr *> Dims, | |||
5136 | ArrayRef<SourceRange> Brackets) { | |||
5137 | if (Base->getType()->isPlaceholderType()) { | |||
5138 | ExprResult Result = CheckPlaceholderExpr(Base); | |||
5139 | if (Result.isInvalid()) | |||
5140 | return ExprError(); | |||
5141 | Result = DefaultLvalueConversion(Result.get()); | |||
5142 | if (Result.isInvalid()) | |||
5143 | return ExprError(); | |||
5144 | Base = Result.get(); | |||
5145 | } | |||
5146 | QualType BaseTy = Base->getType(); | |||
5147 | // Delay analysis of the types/expressions if instantiation/specialization is | |||
5148 | // required. | |||
5149 | if (!BaseTy->isPointerType() && Base->isTypeDependent()) | |||
5150 | return OMPArrayShapingExpr::Create(Context, Context.DependentTy, Base, | |||
5151 | LParenLoc, RParenLoc, Dims, Brackets); | |||
5152 | if (!BaseTy->isPointerType() || | |||
5153 | (!Base->isTypeDependent() && | |||
5154 | BaseTy->getPointeeType()->isIncompleteType())) | |||
5155 | return ExprError(Diag(Base->getExprLoc(), | |||
5156 | diag::err_omp_non_pointer_type_array_shaping_base) | |||
5157 | << Base->getSourceRange()); | |||
5158 | ||||
5159 | SmallVector<Expr *, 4> NewDims; | |||
5160 | bool ErrorFound = false; | |||
5161 | for (Expr *Dim : Dims) { | |||
5162 | if (Dim->getType()->isPlaceholderType()) { | |||
5163 | ExprResult Result = CheckPlaceholderExpr(Dim); | |||
5164 | if (Result.isInvalid()) { | |||
5165 | ErrorFound = true; | |||
5166 | continue; | |||
5167 | } | |||
5168 | Result = DefaultLvalueConversion(Result.get()); | |||
5169 | if (Result.isInvalid()) { | |||
5170 | ErrorFound = true; | |||
5171 | continue; | |||
5172 | } | |||
5173 | Dim = Result.get(); | |||
5174 | } | |||
5175 | if (!Dim->isTypeDependent()) { | |||
5176 | ExprResult Result = | |||
5177 | PerformOpenMPImplicitIntegerConversion(Dim->getExprLoc(), Dim); | |||
5178 | if (Result.isInvalid()) { | |||
5179 | ErrorFound = true; | |||
5180 | Diag(Dim->getExprLoc(), diag::err_omp_typecheck_shaping_not_integer) | |||
5181 | << Dim->getSourceRange(); | |||
5182 | continue; | |||
5183 | } | |||
5184 | Dim = Result.get(); | |||
5185 | Expr::EvalResult EvResult; | |||
5186 | if (!Dim->isValueDependent() && Dim->EvaluateAsInt(EvResult, Context)) { | |||
5187 | // OpenMP 5.0, [2.1.4 Array Shaping] | |||
5188 | // Each si is an integral type expression that must evaluate to a | |||
5189 | // positive integer. | |||
5190 | llvm::APSInt Value = EvResult.Val.getInt(); | |||
5191 | if (!Value.isStrictlyPositive()) { | |||
5192 | Diag(Dim->getExprLoc(), diag::err_omp_shaping_dimension_not_positive) | |||
5193 | << toString(Value, /*Radix=*/10, /*Signed=*/true) | |||
5194 | << Dim->getSourceRange(); | |||
5195 | ErrorFound = true; | |||
5196 | continue; | |||
5197 | } | |||
5198 | } | |||
5199 | } | |||
5200 | NewDims.push_back(Dim); | |||
5201 | } | |||
5202 | if (ErrorFound) | |||
5203 | return ExprError(); | |||
5204 | return OMPArrayShapingExpr::Create(Context, Context.OMPArrayShapingTy, Base, | |||
5205 | LParenLoc, RParenLoc, NewDims, Brackets); | |||
5206 | } | |||
5207 | ||||
5208 | ExprResult Sema::ActOnOMPIteratorExpr(Scope *S, SourceLocation IteratorKwLoc, | |||
5209 | SourceLocation LLoc, SourceLocation RLoc, | |||
5210 | ArrayRef<OMPIteratorData> Data) { | |||
5211 | SmallVector<OMPIteratorExpr::IteratorDefinition, 4> ID; | |||
5212 | bool IsCorrect = true; | |||
5213 | for (const OMPIteratorData &D : Data) { | |||
5214 | TypeSourceInfo *TInfo = nullptr; | |||
5215 | SourceLocation StartLoc; | |||
5216 | QualType DeclTy; | |||
5217 | if (!D.Type.getAsOpaquePtr()) { | |||
5218 | // OpenMP 5.0, 2.1.6 Iterators | |||
5219 | // In an iterator-specifier, if the iterator-type is not specified then | |||
5220 | // the type of that iterator is of int type. | |||
5221 | DeclTy = Context.IntTy; | |||
5222 | StartLoc = D.DeclIdentLoc; | |||
5223 | } else { | |||
5224 | DeclTy = GetTypeFromParser(D.Type, &TInfo); | |||
5225 | StartLoc = TInfo->getTypeLoc().getBeginLoc(); | |||
5226 | } | |||
5227 | ||||
5228 | bool IsDeclTyDependent = DeclTy->isDependentType() || | |||
5229 | DeclTy->containsUnexpandedParameterPack() || | |||
5230 | DeclTy->isInstantiationDependentType(); | |||
5231 | if (!IsDeclTyDependent) { | |||
5232 | if (!DeclTy->isIntegralType(Context) && !DeclTy->isAnyPointerType()) { | |||
5233 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions, C/C++ | |||
5234 | // The iterator-type must be an integral or pointer type. | |||
5235 | Diag(StartLoc, diag::err_omp_iterator_not_integral_or_pointer) | |||
5236 | << DeclTy; | |||
5237 | IsCorrect = false; | |||
5238 | continue; | |||
5239 | } | |||
5240 | if (DeclTy.isConstant(Context)) { | |||
5241 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions, C/C++ | |||
5242 | // The iterator-type must not be const qualified. | |||
5243 | Diag(StartLoc, diag::err_omp_iterator_not_integral_or_pointer) | |||
5244 | << DeclTy; | |||
5245 | IsCorrect = false; | |||
5246 | continue; | |||
5247 | } | |||
5248 | } | |||
5249 | ||||
5250 | // Iterator declaration. | |||
5251 | assert(D.DeclIdent && "Identifier expected.")(static_cast <bool> (D.DeclIdent && "Identifier expected." ) ? void (0) : __assert_fail ("D.DeclIdent && \"Identifier expected.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5251, __extension__ __PRETTY_FUNCTION__)); | |||
5252 | // Always try to create iterator declarator to avoid extra error messages | |||
5253 | // about unknown declarations use. | |||
5254 | auto *VD = VarDecl::Create(Context, CurContext, StartLoc, D.DeclIdentLoc, | |||
5255 | D.DeclIdent, DeclTy, TInfo, SC_None); | |||
5256 | VD->setImplicit(); | |||
5257 | if (S) { | |||
5258 | // Check for conflicting previous declaration. | |||
5259 | DeclarationNameInfo NameInfo(VD->getDeclName(), D.DeclIdentLoc); | |||
5260 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | |||
5261 | ForVisibleRedeclaration); | |||
5262 | Previous.suppressDiagnostics(); | |||
5263 | LookupName(Previous, S); | |||
5264 | ||||
5265 | FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage=*/false, | |||
5266 | /*AllowInlineNamespace=*/false); | |||
5267 | if (!Previous.empty()) { | |||
5268 | NamedDecl *Old = Previous.getRepresentativeDecl(); | |||
5269 | Diag(D.DeclIdentLoc, diag::err_redefinition) << VD->getDeclName(); | |||
5270 | Diag(Old->getLocation(), diag::note_previous_definition); | |||
5271 | } else { | |||
5272 | PushOnScopeChains(VD, S); | |||
5273 | } | |||
5274 | } else { | |||
5275 | CurContext->addDecl(VD); | |||
5276 | } | |||
5277 | Expr *Begin = D.Range.Begin; | |||
5278 | if (!IsDeclTyDependent && Begin && !Begin->isTypeDependent()) { | |||
5279 | ExprResult BeginRes = | |||
5280 | PerformImplicitConversion(Begin, DeclTy, AA_Converting); | |||
5281 | Begin = BeginRes.get(); | |||
5282 | } | |||
5283 | Expr *End = D.Range.End; | |||
5284 | if (!IsDeclTyDependent && End && !End->isTypeDependent()) { | |||
5285 | ExprResult EndRes = PerformImplicitConversion(End, DeclTy, AA_Converting); | |||
5286 | End = EndRes.get(); | |||
5287 | } | |||
5288 | Expr *Step = D.Range.Step; | |||
5289 | if (!IsDeclTyDependent && Step && !Step->isTypeDependent()) { | |||
5290 | if (!Step->getType()->isIntegralType(Context)) { | |||
5291 | Diag(Step->getExprLoc(), diag::err_omp_iterator_step_not_integral) | |||
5292 | << Step << Step->getSourceRange(); | |||
5293 | IsCorrect = false; | |||
5294 | continue; | |||
5295 | } | |||
5296 | Optional<llvm::APSInt> Result = Step->getIntegerConstantExpr(Context); | |||
5297 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions | |||
5298 | // If the step expression of a range-specification equals zero, the | |||
5299 | // behavior is unspecified. | |||
5300 | if (Result && Result->isNullValue()) { | |||
5301 | Diag(Step->getExprLoc(), diag::err_omp_iterator_step_constant_zero) | |||
5302 | << Step << Step->getSourceRange(); | |||
5303 | IsCorrect = false; | |||
5304 | continue; | |||
5305 | } | |||
5306 | } | |||
5307 | if (!Begin || !End || !IsCorrect) { | |||
5308 | IsCorrect = false; | |||
5309 | continue; | |||
5310 | } | |||
5311 | OMPIteratorExpr::IteratorDefinition &IDElem = ID.emplace_back(); | |||
5312 | IDElem.IteratorDecl = VD; | |||
5313 | IDElem.AssignmentLoc = D.AssignLoc; | |||
5314 | IDElem.Range.Begin = Begin; | |||
5315 | IDElem.Range.End = End; | |||
5316 | IDElem.Range.Step = Step; | |||
5317 | IDElem.ColonLoc = D.ColonLoc; | |||
5318 | IDElem.SecondColonLoc = D.SecColonLoc; | |||
5319 | } | |||
5320 | if (!IsCorrect) { | |||
5321 | // Invalidate all created iterator declarations if error is found. | |||
5322 | for (const OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5323 | if (Decl *ID = D.IteratorDecl) | |||
5324 | ID->setInvalidDecl(); | |||
5325 | } | |||
5326 | return ExprError(); | |||
5327 | } | |||
5328 | SmallVector<OMPIteratorHelperData, 4> Helpers; | |||
5329 | if (!CurContext->isDependentContext()) { | |||
5330 | // Build number of ityeration for each iteration range. | |||
5331 | // Ni = ((Stepi > 0) ? ((Endi + Stepi -1 - Begini)/Stepi) : | |||
5332 | // ((Begini-Stepi-1-Endi) / -Stepi); | |||
5333 | for (OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5334 | // (Endi - Begini) | |||
5335 | ExprResult Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, D.Range.End, | |||
5336 | D.Range.Begin); | |||
5337 | if(!Res.isUsable()) { | |||
5338 | IsCorrect = false; | |||
5339 | continue; | |||
5340 | } | |||
5341 | ExprResult St, St1; | |||
5342 | if (D.Range.Step) { | |||
5343 | St = D.Range.Step; | |||
5344 | // (Endi - Begini) + Stepi | |||
5345 | Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, Res.get(), St.get()); | |||
5346 | if (!Res.isUsable()) { | |||
5347 | IsCorrect = false; | |||
5348 | continue; | |||
5349 | } | |||
5350 | // (Endi - Begini) + Stepi - 1 | |||
5351 | Res = | |||
5352 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, Res.get(), | |||
5353 | ActOnIntegerConstant(D.AssignmentLoc, 1).get()); | |||
5354 | if (!Res.isUsable()) { | |||
5355 | IsCorrect = false; | |||
5356 | continue; | |||
5357 | } | |||
5358 | // ((Endi - Begini) + Stepi - 1) / Stepi | |||
5359 | Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Div, Res.get(), St.get()); | |||
5360 | if (!Res.isUsable()) { | |||
5361 | IsCorrect = false; | |||
5362 | continue; | |||
5363 | } | |||
5364 | St1 = CreateBuiltinUnaryOp(D.AssignmentLoc, UO_Minus, D.Range.Step); | |||
5365 | // (Begini - Endi) | |||
5366 | ExprResult Res1 = CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, | |||
5367 | D.Range.Begin, D.Range.End); | |||
5368 | if (!Res1.isUsable()) { | |||
5369 | IsCorrect = false; | |||
5370 | continue; | |||
5371 | } | |||
5372 | // (Begini - Endi) - Stepi | |||
5373 | Res1 = | |||
5374 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, Res1.get(), St1.get()); | |||
5375 | if (!Res1.isUsable()) { | |||
5376 | IsCorrect = false; | |||
5377 | continue; | |||
5378 | } | |||
5379 | // (Begini - Endi) - Stepi - 1 | |||
5380 | Res1 = | |||
5381 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, Res1.get(), | |||
5382 | ActOnIntegerConstant(D.AssignmentLoc, 1).get()); | |||
5383 | if (!Res1.isUsable()) { | |||
5384 | IsCorrect = false; | |||
5385 | continue; | |||
5386 | } | |||
5387 | // ((Begini - Endi) - Stepi - 1) / (-Stepi) | |||
5388 | Res1 = | |||
5389 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Div, Res1.get(), St1.get()); | |||
5390 | if (!Res1.isUsable()) { | |||
5391 | IsCorrect = false; | |||
5392 | continue; | |||
5393 | } | |||
5394 | // Stepi > 0. | |||
5395 | ExprResult CmpRes = | |||
5396 | CreateBuiltinBinOp(D.AssignmentLoc, BO_GT, D.Range.Step, | |||
5397 | ActOnIntegerConstant(D.AssignmentLoc, 0).get()); | |||
5398 | if (!CmpRes.isUsable()) { | |||
5399 | IsCorrect = false; | |||
5400 | continue; | |||
5401 | } | |||
5402 | Res = ActOnConditionalOp(D.AssignmentLoc, D.AssignmentLoc, CmpRes.get(), | |||
5403 | Res.get(), Res1.get()); | |||
5404 | if (!Res.isUsable()) { | |||
5405 | IsCorrect = false; | |||
5406 | continue; | |||
5407 | } | |||
5408 | } | |||
5409 | Res = ActOnFinishFullExpr(Res.get(), /*DiscardedValue=*/false); | |||
5410 | if (!Res.isUsable()) { | |||
5411 | IsCorrect = false; | |||
5412 | continue; | |||
5413 | } | |||
5414 | ||||
5415 | // Build counter update. | |||
5416 | // Build counter. | |||
5417 | auto *CounterVD = | |||
5418 | VarDecl::Create(Context, CurContext, D.IteratorDecl->getBeginLoc(), | |||
5419 | D.IteratorDecl->getBeginLoc(), nullptr, | |||
5420 | Res.get()->getType(), nullptr, SC_None); | |||
5421 | CounterVD->setImplicit(); | |||
5422 | ExprResult RefRes = | |||
5423 | BuildDeclRefExpr(CounterVD, CounterVD->getType(), VK_LValue, | |||
5424 | D.IteratorDecl->getBeginLoc()); | |||
5425 | // Build counter update. | |||
5426 | // I = Begini + counter * Stepi; | |||
5427 | ExprResult UpdateRes; | |||
5428 | if (D.Range.Step) { | |||
5429 | UpdateRes = CreateBuiltinBinOp( | |||
5430 | D.AssignmentLoc, BO_Mul, | |||
5431 | DefaultLvalueConversion(RefRes.get()).get(), St.get()); | |||
5432 | } else { | |||
5433 | UpdateRes = DefaultLvalueConversion(RefRes.get()); | |||
5434 | } | |||
5435 | if (!UpdateRes.isUsable()) { | |||
5436 | IsCorrect = false; | |||
5437 | continue; | |||
5438 | } | |||
5439 | UpdateRes = CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, D.Range.Begin, | |||
5440 | UpdateRes.get()); | |||
5441 | if (!UpdateRes.isUsable()) { | |||
5442 | IsCorrect = false; | |||
5443 | continue; | |||
5444 | } | |||
5445 | ExprResult VDRes = | |||
5446 | BuildDeclRefExpr(cast<VarDecl>(D.IteratorDecl), | |||
5447 | cast<VarDecl>(D.IteratorDecl)->getType(), VK_LValue, | |||
5448 | D.IteratorDecl->getBeginLoc()); | |||
5449 | UpdateRes = CreateBuiltinBinOp(D.AssignmentLoc, BO_Assign, VDRes.get(), | |||
5450 | UpdateRes.get()); | |||
5451 | if (!UpdateRes.isUsable()) { | |||
5452 | IsCorrect = false; | |||
5453 | continue; | |||
5454 | } | |||
5455 | UpdateRes = | |||
5456 | ActOnFinishFullExpr(UpdateRes.get(), /*DiscardedValue=*/true); | |||
5457 | if (!UpdateRes.isUsable()) { | |||
5458 | IsCorrect = false; | |||
5459 | continue; | |||
5460 | } | |||
5461 | ExprResult CounterUpdateRes = | |||
5462 | CreateBuiltinUnaryOp(D.AssignmentLoc, UO_PreInc, RefRes.get()); | |||
5463 | if (!CounterUpdateRes.isUsable()) { | |||
5464 | IsCorrect = false; | |||
5465 | continue; | |||
5466 | } | |||
5467 | CounterUpdateRes = | |||
5468 | ActOnFinishFullExpr(CounterUpdateRes.get(), /*DiscardedValue=*/true); | |||
5469 | if (!CounterUpdateRes.isUsable()) { | |||
5470 | IsCorrect = false; | |||
5471 | continue; | |||
5472 | } | |||
5473 | OMPIteratorHelperData &HD = Helpers.emplace_back(); | |||
5474 | HD.CounterVD = CounterVD; | |||
5475 | HD.Upper = Res.get(); | |||
5476 | HD.Update = UpdateRes.get(); | |||
5477 | HD.CounterUpdate = CounterUpdateRes.get(); | |||
5478 | } | |||
5479 | } else { | |||
5480 | Helpers.assign(ID.size(), {}); | |||
5481 | } | |||
5482 | if (!IsCorrect) { | |||
5483 | // Invalidate all created iterator declarations if error is found. | |||
5484 | for (const OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5485 | if (Decl *ID = D.IteratorDecl) | |||
5486 | ID->setInvalidDecl(); | |||
5487 | } | |||
5488 | return ExprError(); | |||
5489 | } | |||
5490 | return OMPIteratorExpr::Create(Context, Context.OMPIteratorTy, IteratorKwLoc, | |||
5491 | LLoc, RLoc, ID, Helpers); | |||
5492 | } | |||
5493 | ||||
5494 | ExprResult | |||
5495 | Sema::CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, | |||
5496 | Expr *Idx, SourceLocation RLoc) { | |||
5497 | Expr *LHSExp = Base; | |||
5498 | Expr *RHSExp = Idx; | |||
5499 | ||||
5500 | ExprValueKind VK = VK_LValue; | |||
5501 | ExprObjectKind OK = OK_Ordinary; | |||
5502 | ||||
5503 | // Per C++ core issue 1213, the result is an xvalue if either operand is | |||
5504 | // a non-lvalue array, and an lvalue otherwise. | |||
5505 | if (getLangOpts().CPlusPlus11) { | |||
5506 | for (auto *Op : {LHSExp, RHSExp}) { | |||
5507 | Op = Op->IgnoreImplicit(); | |||
5508 | if (Op->getType()->isArrayType() && !Op->isLValue()) | |||
5509 | VK = VK_XValue; | |||
5510 | } | |||
5511 | } | |||
5512 | ||||
5513 | // Perform default conversions. | |||
5514 | if (!LHSExp->getType()->getAs<VectorType>()) { | |||
5515 | ExprResult Result = DefaultFunctionArrayLvalueConversion(LHSExp); | |||
5516 | if (Result.isInvalid()) | |||
5517 | return ExprError(); | |||
5518 | LHSExp = Result.get(); | |||
5519 | } | |||
5520 | ExprResult Result = DefaultFunctionArrayLvalueConversion(RHSExp); | |||
5521 | if (Result.isInvalid()) | |||
5522 | return ExprError(); | |||
5523 | RHSExp = Result.get(); | |||
5524 | ||||
5525 | QualType LHSTy = LHSExp->getType(), RHSTy = RHSExp->getType(); | |||
5526 | ||||
5527 | // C99 6.5.2.1p2: the expression e1[e2] is by definition precisely equivalent | |||
5528 | // to the expression *((e1)+(e2)). This means the array "Base" may actually be | |||
5529 | // in the subscript position. As a result, we need to derive the array base | |||
5530 | // and index from the expression types. | |||
5531 | Expr *BaseExpr, *IndexExpr; | |||
5532 | QualType ResultType; | |||
5533 | if (LHSTy->isDependentType() || RHSTy->isDependentType()) { | |||
5534 | BaseExpr = LHSExp; | |||
5535 | IndexExpr = RHSExp; | |||
5536 | ResultType = Context.DependentTy; | |||
5537 | } else if (const PointerType *PTy = LHSTy->getAs<PointerType>()) { | |||
5538 | BaseExpr = LHSExp; | |||
5539 | IndexExpr = RHSExp; | |||
5540 | ResultType = PTy->getPointeeType(); | |||
5541 | } else if (const ObjCObjectPointerType *PTy = | |||
5542 | LHSTy->getAs<ObjCObjectPointerType>()) { | |||
5543 | BaseExpr = LHSExp; | |||
5544 | IndexExpr = RHSExp; | |||
5545 | ||||
5546 | // Use custom logic if this should be the pseudo-object subscript | |||
5547 | // expression. | |||
5548 | if (!LangOpts.isSubscriptPointerArithmetic()) | |||
5549 | return BuildObjCSubscriptExpression(RLoc, BaseExpr, IndexExpr, nullptr, | |||
5550 | nullptr); | |||
5551 | ||||
5552 | ResultType = PTy->getPointeeType(); | |||
5553 | } else if (const PointerType *PTy = RHSTy->getAs<PointerType>()) { | |||
5554 | // Handle the uncommon case of "123[Ptr]". | |||
5555 | BaseExpr = RHSExp; | |||
5556 | IndexExpr = LHSExp; | |||
5557 | ResultType = PTy->getPointeeType(); | |||
5558 | } else if (const ObjCObjectPointerType *PTy = | |||
5559 | RHSTy->getAs<ObjCObjectPointerType>()) { | |||
5560 | // Handle the uncommon case of "123[Ptr]". | |||
5561 | BaseExpr = RHSExp; | |||
5562 | IndexExpr = LHSExp; | |||
5563 | ResultType = PTy->getPointeeType(); | |||
5564 | if (!LangOpts.isSubscriptPointerArithmetic()) { | |||
5565 | Diag(LLoc, diag::err_subscript_nonfragile_interface) | |||
5566 | << ResultType << BaseExpr->getSourceRange(); | |||
5567 | return ExprError(); | |||
5568 | } | |||
5569 | } else if (const VectorType *VTy = LHSTy->getAs<VectorType>()) { | |||
5570 | BaseExpr = LHSExp; // vectors: V[123] | |||
5571 | IndexExpr = RHSExp; | |||
5572 | // We apply C++ DR1213 to vector subscripting too. | |||
5573 | if (getLangOpts().CPlusPlus11 && LHSExp->isPRValue()) { | |||
5574 | ExprResult Materialized = TemporaryMaterializationConversion(LHSExp); | |||
5575 | if (Materialized.isInvalid()) | |||
5576 | return ExprError(); | |||
5577 | LHSExp = Materialized.get(); | |||
5578 | } | |||
5579 | VK = LHSExp->getValueKind(); | |||
5580 | if (VK != VK_PRValue) | |||
5581 | OK = OK_VectorComponent; | |||
5582 | ||||
5583 | ResultType = VTy->getElementType(); | |||
5584 | QualType BaseType = BaseExpr->getType(); | |||
5585 | Qualifiers BaseQuals = BaseType.getQualifiers(); | |||
5586 | Qualifiers MemberQuals = ResultType.getQualifiers(); | |||
5587 | Qualifiers Combined = BaseQuals + MemberQuals; | |||
5588 | if (Combined != MemberQuals) | |||
5589 | ResultType = Context.getQualifiedType(ResultType, Combined); | |||
5590 | } else if (LHSTy->isArrayType()) { | |||
5591 | // If we see an array that wasn't promoted by | |||
5592 | // DefaultFunctionArrayLvalueConversion, it must be an array that | |||
5593 | // wasn't promoted because of the C90 rule that doesn't | |||
5594 | // allow promoting non-lvalue arrays. Warn, then | |||
5595 | // force the promotion here. | |||
5596 | Diag(LHSExp->getBeginLoc(), diag::ext_subscript_non_lvalue) | |||
5597 | << LHSExp->getSourceRange(); | |||
5598 | LHSExp = ImpCastExprToType(LHSExp, Context.getArrayDecayedType(LHSTy), | |||
5599 | CK_ArrayToPointerDecay).get(); | |||
5600 | LHSTy = LHSExp->getType(); | |||
5601 | ||||
5602 | BaseExpr = LHSExp; | |||
5603 | IndexExpr = RHSExp; | |||
5604 | ResultType = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
5605 | } else if (RHSTy->isArrayType()) { | |||
5606 | // Same as previous, except for 123[f().a] case | |||
5607 | Diag(RHSExp->getBeginLoc(), diag::ext_subscript_non_lvalue) | |||
5608 | << RHSExp->getSourceRange(); | |||
5609 | RHSExp = ImpCastExprToType(RHSExp, Context.getArrayDecayedType(RHSTy), | |||
5610 | CK_ArrayToPointerDecay).get(); | |||
5611 | RHSTy = RHSExp->getType(); | |||
5612 | ||||
5613 | BaseExpr = RHSExp; | |||
5614 | IndexExpr = LHSExp; | |||
5615 | ResultType = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
5616 | } else { | |||
5617 | return ExprError(Diag(LLoc, diag::err_typecheck_subscript_value) | |||
5618 | << LHSExp->getSourceRange() << RHSExp->getSourceRange()); | |||
5619 | } | |||
5620 | // C99 6.5.2.1p1 | |||
5621 | if (!IndexExpr->getType()->isIntegerType() && !IndexExpr->isTypeDependent()) | |||
5622 | return ExprError(Diag(LLoc, diag::err_typecheck_subscript_not_integer) | |||
5623 | << IndexExpr->getSourceRange()); | |||
5624 | ||||
5625 | if ((IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5626 | IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5627 | && !IndexExpr->isTypeDependent()) | |||
5628 | Diag(LLoc, diag::warn_subscript_is_char) << IndexExpr->getSourceRange(); | |||
5629 | ||||
5630 | // C99 6.5.2.1p1: "shall have type "pointer to *object* type". Similarly, | |||
5631 | // C++ [expr.sub]p1: The type "T" shall be a completely-defined object | |||
5632 | // type. Note that Functions are not objects, and that (in C99 parlance) | |||
5633 | // incomplete types are not object types. | |||
5634 | if (ResultType->isFunctionType()) { | |||
5635 | Diag(BaseExpr->getBeginLoc(), diag::err_subscript_function_type) | |||
5636 | << ResultType << BaseExpr->getSourceRange(); | |||
5637 | return ExprError(); | |||
5638 | } | |||
5639 | ||||
5640 | if (ResultType->isVoidType() && !getLangOpts().CPlusPlus) { | |||
5641 | // GNU extension: subscripting on pointer to void | |||
5642 | Diag(LLoc, diag::ext_gnu_subscript_void_type) | |||
5643 | << BaseExpr->getSourceRange(); | |||
5644 | ||||
5645 | // C forbids expressions of unqualified void type from being l-values. | |||
5646 | // See IsCForbiddenLValueType. | |||
5647 | if (!ResultType.hasQualifiers()) | |||
5648 | VK = VK_PRValue; | |||
5649 | } else if (!ResultType->isDependentType() && | |||
5650 | RequireCompleteSizedType( | |||
5651 | LLoc, ResultType, | |||
5652 | diag::err_subscript_incomplete_or_sizeless_type, BaseExpr)) | |||
5653 | return ExprError(); | |||
5654 | ||||
5655 | assert(VK == VK_PRValue || LangOpts.CPlusPlus ||(static_cast <bool> (VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()) ? void (0) : __assert_fail ("VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5656, __extension__ __PRETTY_FUNCTION__)) | |||
5656 | !ResultType.isCForbiddenLValueType())(static_cast <bool> (VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()) ? void (0) : __assert_fail ("VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5656, __extension__ __PRETTY_FUNCTION__)); | |||
5657 | ||||
5658 | if (LHSExp->IgnoreParenImpCasts()->getType()->isVariablyModifiedType() && | |||
5659 | FunctionScopes.size() > 1) { | |||
5660 | if (auto *TT = | |||
5661 | LHSExp->IgnoreParenImpCasts()->getType()->getAs<TypedefType>()) { | |||
5662 | for (auto I = FunctionScopes.rbegin(), | |||
5663 | E = std::prev(FunctionScopes.rend()); | |||
5664 | I != E; ++I) { | |||
5665 | auto *CSI = dyn_cast<CapturingScopeInfo>(*I); | |||
5666 | if (CSI == nullptr) | |||
5667 | break; | |||
5668 | DeclContext *DC = nullptr; | |||
5669 | if (auto *LSI = dyn_cast<LambdaScopeInfo>(CSI)) | |||
5670 | DC = LSI->CallOperator; | |||
5671 | else if (auto *CRSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) | |||
5672 | DC = CRSI->TheCapturedDecl; | |||
5673 | else if (auto *BSI = dyn_cast<BlockScopeInfo>(CSI)) | |||
5674 | DC = BSI->TheDecl; | |||
5675 | if (DC) { | |||
5676 | if (DC->containsDecl(TT->getDecl())) | |||
5677 | break; | |||
5678 | captureVariablyModifiedType( | |||
5679 | Context, LHSExp->IgnoreParenImpCasts()->getType(), CSI); | |||
5680 | } | |||
5681 | } | |||
5682 | } | |||
5683 | } | |||
5684 | ||||
5685 | return new (Context) | |||
5686 | ArraySubscriptExpr(LHSExp, RHSExp, ResultType, VK, OK, RLoc); | |||
5687 | } | |||
5688 | ||||
5689 | bool Sema::CheckCXXDefaultArgExpr(SourceLocation CallLoc, FunctionDecl *FD, | |||
5690 | ParmVarDecl *Param) { | |||
5691 | if (Param->hasUnparsedDefaultArg()) { | |||
5692 | // If we've already cleared out the location for the default argument, | |||
5693 | // that means we're parsing it right now. | |||
5694 | if (!UnparsedDefaultArgLocs.count(Param)) { | |||
5695 | Diag(Param->getBeginLoc(), diag::err_recursive_default_argument) << FD; | |||
5696 | Diag(CallLoc, diag::note_recursive_default_argument_used_here); | |||
5697 | Param->setInvalidDecl(); | |||
5698 | return true; | |||
5699 | } | |||
5700 | ||||
5701 | Diag(CallLoc, diag::err_use_of_default_argument_to_function_declared_later) | |||
5702 | << FD << cast<CXXRecordDecl>(FD->getDeclContext()); | |||
5703 | Diag(UnparsedDefaultArgLocs[Param], | |||
5704 | diag::note_default_argument_declared_here); | |||
5705 | return true; | |||
5706 | } | |||
5707 | ||||
5708 | if (Param->hasUninstantiatedDefaultArg() && | |||
5709 | InstantiateDefaultArgument(CallLoc, FD, Param)) | |||
5710 | return true; | |||
5711 | ||||
5712 | assert(Param->hasInit() && "default argument but no initializer?")(static_cast <bool> (Param->hasInit() && "default argument but no initializer?" ) ? void (0) : __assert_fail ("Param->hasInit() && \"default argument but no initializer?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5712, __extension__ __PRETTY_FUNCTION__)); | |||
5713 | ||||
5714 | // If the default expression creates temporaries, we need to | |||
5715 | // push them to the current stack of expression temporaries so they'll | |||
5716 | // be properly destroyed. | |||
5717 | // FIXME: We should really be rebuilding the default argument with new | |||
5718 | // bound temporaries; see the comment in PR5810. | |||
5719 | // We don't need to do that with block decls, though, because | |||
5720 | // blocks in default argument expression can never capture anything. | |||
5721 | if (auto Init = dyn_cast<ExprWithCleanups>(Param->getInit())) { | |||
5722 | // Set the "needs cleanups" bit regardless of whether there are | |||
5723 | // any explicit objects. | |||
5724 | Cleanup.setExprNeedsCleanups(Init->cleanupsHaveSideEffects()); | |||
5725 | ||||
5726 | // Append all the objects to the cleanup list. Right now, this | |||
5727 | // should always be a no-op, because blocks in default argument | |||
5728 | // expressions should never be able to capture anything. | |||
5729 | assert(!Init->getNumObjects() &&(static_cast <bool> (!Init->getNumObjects() && "default argument expression has capturing blocks?") ? void ( 0) : __assert_fail ("!Init->getNumObjects() && \"default argument expression has capturing blocks?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5730, __extension__ __PRETTY_FUNCTION__)) | |||
5730 | "default argument expression has capturing blocks?")(static_cast <bool> (!Init->getNumObjects() && "default argument expression has capturing blocks?") ? void ( 0) : __assert_fail ("!Init->getNumObjects() && \"default argument expression has capturing blocks?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5730, __extension__ __PRETTY_FUNCTION__)); | |||
5731 | } | |||
5732 | ||||
5733 | // We already type-checked the argument, so we know it works. | |||
5734 | // Just mark all of the declarations in this potentially-evaluated expression | |||
5735 | // as being "referenced". | |||
5736 | EnterExpressionEvaluationContext EvalContext( | |||
5737 | *this, ExpressionEvaluationContext::PotentiallyEvaluated, Param); | |||
5738 | MarkDeclarationsReferencedInExpr(Param->getDefaultArg(), | |||
5739 | /*SkipLocalVariables=*/true); | |||
5740 | return false; | |||
5741 | } | |||
5742 | ||||
5743 | ExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc, | |||
5744 | FunctionDecl *FD, ParmVarDecl *Param) { | |||
5745 | assert(Param->hasDefaultArg() && "can't build nonexistent default arg")(static_cast <bool> (Param->hasDefaultArg() && "can't build nonexistent default arg") ? void (0) : __assert_fail ("Param->hasDefaultArg() && \"can't build nonexistent default arg\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5745, __extension__ __PRETTY_FUNCTION__)); | |||
5746 | if (CheckCXXDefaultArgExpr(CallLoc, FD, Param)) | |||
5747 | return ExprError(); | |||
5748 | return CXXDefaultArgExpr::Create(Context, CallLoc, Param, CurContext); | |||
5749 | } | |||
5750 | ||||
5751 | Sema::VariadicCallType | |||
5752 | Sema::getVariadicCallType(FunctionDecl *FDecl, const FunctionProtoType *Proto, | |||
5753 | Expr *Fn) { | |||
5754 | if (Proto && Proto->isVariadic()) { | |||
5755 | if (dyn_cast_or_null<CXXConstructorDecl>(FDecl)) | |||
5756 | return VariadicConstructor; | |||
5757 | else if (Fn && Fn->getType()->isBlockPointerType()) | |||
5758 | return VariadicBlock; | |||
5759 | else if (FDecl) { | |||
5760 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl)) | |||
5761 | if (Method->isInstance()) | |||
5762 | return VariadicMethod; | |||
5763 | } else if (Fn && Fn->getType() == Context.BoundMemberTy) | |||
5764 | return VariadicMethod; | |||
5765 | return VariadicFunction; | |||
5766 | } | |||
5767 | return VariadicDoesNotApply; | |||
5768 | } | |||
5769 | ||||
5770 | namespace { | |||
5771 | class FunctionCallCCC final : public FunctionCallFilterCCC { | |||
5772 | public: | |||
5773 | FunctionCallCCC(Sema &SemaRef, const IdentifierInfo *FuncName, | |||
5774 | unsigned NumArgs, MemberExpr *ME) | |||
5775 | : FunctionCallFilterCCC(SemaRef, NumArgs, false, ME), | |||
5776 | FunctionName(FuncName) {} | |||
5777 | ||||
5778 | bool ValidateCandidate(const TypoCorrection &candidate) override { | |||
5779 | if (!candidate.getCorrectionSpecifier() || | |||
5780 | candidate.getCorrectionAsIdentifierInfo() != FunctionName) { | |||
5781 | return false; | |||
5782 | } | |||
5783 | ||||
5784 | return FunctionCallFilterCCC::ValidateCandidate(candidate); | |||
5785 | } | |||
5786 | ||||
5787 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | |||
5788 | return std::make_unique<FunctionCallCCC>(*this); | |||
5789 | } | |||
5790 | ||||
5791 | private: | |||
5792 | const IdentifierInfo *const FunctionName; | |||
5793 | }; | |||
5794 | } | |||
5795 | ||||
5796 | static TypoCorrection TryTypoCorrectionForCall(Sema &S, Expr *Fn, | |||
5797 | FunctionDecl *FDecl, | |||
5798 | ArrayRef<Expr *> Args) { | |||
5799 | MemberExpr *ME = dyn_cast<MemberExpr>(Fn); | |||
5800 | DeclarationName FuncName = FDecl->getDeclName(); | |||
5801 | SourceLocation NameLoc = ME ? ME->getMemberLoc() : Fn->getBeginLoc(); | |||
5802 | ||||
5803 | FunctionCallCCC CCC(S, FuncName.getAsIdentifierInfo(), Args.size(), ME); | |||
5804 | if (TypoCorrection Corrected = S.CorrectTypo( | |||
5805 | DeclarationNameInfo(FuncName, NameLoc), Sema::LookupOrdinaryName, | |||
5806 | S.getScopeForContext(S.CurContext), nullptr, CCC, | |||
5807 | Sema::CTK_ErrorRecovery)) { | |||
5808 | if (NamedDecl *ND = Corrected.getFoundDecl()) { | |||
5809 | if (Corrected.isOverloaded()) { | |||
5810 | OverloadCandidateSet OCS(NameLoc, OverloadCandidateSet::CSK_Normal); | |||
5811 | OverloadCandidateSet::iterator Best; | |||
5812 | for (NamedDecl *CD : Corrected) { | |||
5813 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(CD)) | |||
5814 | S.AddOverloadCandidate(FD, DeclAccessPair::make(FD, AS_none), Args, | |||
5815 | OCS); | |||
5816 | } | |||
5817 | switch (OCS.BestViableFunction(S, NameLoc, Best)) { | |||
5818 | case OR_Success: | |||
5819 | ND = Best->FoundDecl; | |||
5820 | Corrected.setCorrectionDecl(ND); | |||
5821 | break; | |||
5822 | default: | |||
5823 | break; | |||
5824 | } | |||
5825 | } | |||
5826 | ND = ND->getUnderlyingDecl(); | |||
5827 | if (isa<ValueDecl>(ND) || isa<FunctionTemplateDecl>(ND)) | |||
5828 | return Corrected; | |||
5829 | } | |||
5830 | } | |||
5831 | return TypoCorrection(); | |||
5832 | } | |||
5833 | ||||
5834 | /// ConvertArgumentsForCall - Converts the arguments specified in | |||
5835 | /// Args/NumArgs to the parameter types of the function FDecl with | |||
5836 | /// function prototype Proto. Call is the call expression itself, and | |||
5837 | /// Fn is the function expression. For a C++ member function, this | |||
5838 | /// routine does not attempt to convert the object argument. Returns | |||
5839 | /// true if the call is ill-formed. | |||
5840 | bool | |||
5841 | Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, | |||
5842 | FunctionDecl *FDecl, | |||
5843 | const FunctionProtoType *Proto, | |||
5844 | ArrayRef<Expr *> Args, | |||
5845 | SourceLocation RParenLoc, | |||
5846 | bool IsExecConfig) { | |||
5847 | // Bail out early if calling a builtin with custom typechecking. | |||
5848 | if (FDecl) | |||
5849 | if (unsigned ID = FDecl->getBuiltinID()) | |||
5850 | if (Context.BuiltinInfo.hasCustomTypechecking(ID)) | |||
5851 | return false; | |||
5852 | ||||
5853 | // C99 6.5.2.2p7 - the arguments are implicitly converted, as if by | |||
5854 | // assignment, to the types of the corresponding parameter, ... | |||
5855 | unsigned NumParams = Proto->getNumParams(); | |||
5856 | bool Invalid = false; | |||
5857 | unsigned MinArgs = FDecl ? FDecl->getMinRequiredArguments() : NumParams; | |||
5858 | unsigned FnKind = Fn->getType()->isBlockPointerType() | |||
5859 | ? 1 /* block */ | |||
5860 | : (IsExecConfig ? 3 /* kernel function (exec config) */ | |||
5861 | : 0 /* function */); | |||
5862 | ||||
5863 | // If too few arguments are available (and we don't have default | |||
5864 | // arguments for the remaining parameters), don't make the call. | |||
5865 | if (Args.size() < NumParams) { | |||
5866 | if (Args.size() < MinArgs) { | |||
5867 | TypoCorrection TC; | |||
5868 | if (FDecl && (TC = TryTypoCorrectionForCall(*this, Fn, FDecl, Args))) { | |||
5869 | unsigned diag_id = | |||
5870 | MinArgs == NumParams && !Proto->isVariadic() | |||
5871 | ? diag::err_typecheck_call_too_few_args_suggest | |||
5872 | : diag::err_typecheck_call_too_few_args_at_least_suggest; | |||
5873 | diagnoseTypo(TC, PDiag(diag_id) << FnKind << MinArgs | |||
5874 | << static_cast<unsigned>(Args.size()) | |||
5875 | << TC.getCorrectionRange()); | |||
5876 | } else if (MinArgs == 1 && FDecl && FDecl->getParamDecl(0)->getDeclName()) | |||
5877 | Diag(RParenLoc, | |||
5878 | MinArgs == NumParams && !Proto->isVariadic() | |||
5879 | ? diag::err_typecheck_call_too_few_args_one | |||
5880 | : diag::err_typecheck_call_too_few_args_at_least_one) | |||
5881 | << FnKind << FDecl->getParamDecl(0) << Fn->getSourceRange(); | |||
5882 | else | |||
5883 | Diag(RParenLoc, MinArgs == NumParams && !Proto->isVariadic() | |||
5884 | ? diag::err_typecheck_call_too_few_args | |||
5885 | : diag::err_typecheck_call_too_few_args_at_least) | |||
5886 | << FnKind << MinArgs << static_cast<unsigned>(Args.size()) | |||
5887 | << Fn->getSourceRange(); | |||
5888 | ||||
5889 | // Emit the location of the prototype. | |||
5890 | if (!TC && FDecl && !FDecl->getBuiltinID() && !IsExecConfig) | |||
5891 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
5892 | ||||
5893 | return true; | |||
5894 | } | |||
5895 | // We reserve space for the default arguments when we create | |||
5896 | // the call expression, before calling ConvertArgumentsForCall. | |||
5897 | assert((Call->getNumArgs() == NumParams) &&(static_cast <bool> ((Call->getNumArgs() == NumParams ) && "We should have reserved space for the default arguments before!" ) ? void (0) : __assert_fail ("(Call->getNumArgs() == NumParams) && \"We should have reserved space for the default arguments before!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5898, __extension__ __PRETTY_FUNCTION__)) | |||
5898 | "We should have reserved space for the default arguments before!")(static_cast <bool> ((Call->getNumArgs() == NumParams ) && "We should have reserved space for the default arguments before!" ) ? void (0) : __assert_fail ("(Call->getNumArgs() == NumParams) && \"We should have reserved space for the default arguments before!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 5898, __extension__ __PRETTY_FUNCTION__)); | |||
5899 | } | |||
5900 | ||||
5901 | // If too many are passed and not variadic, error on the extras and drop | |||
5902 | // them. | |||
5903 | if (Args.size() > NumParams) { | |||
5904 | if (!Proto->isVariadic()) { | |||
5905 | TypoCorrection TC; | |||
5906 | if (FDecl && (TC = TryTypoCorrectionForCall(*this, Fn, FDecl, Args))) { | |||
5907 | unsigned diag_id = | |||
5908 | MinArgs == NumParams && !Proto->isVariadic() | |||
5909 | ? diag::err_typecheck_call_too_many_args_suggest | |||
5910 | : diag::err_typecheck_call_too_many_args_at_most_suggest; | |||
5911 | diagnoseTypo(TC, PDiag(diag_id) << FnKind << NumParams | |||
5912 | << static_cast<unsigned>(Args.size()) | |||
5913 | << TC.getCorrectionRange()); | |||
5914 | } else if (NumParams == 1 && FDecl && | |||
5915 | FDecl->getParamDecl(0)->getDeclName()) | |||
5916 | Diag(Args[NumParams]->getBeginLoc(), | |||
5917 | MinArgs == NumParams | |||
5918 | ? diag::err_typecheck_call_too_many_args_one | |||
5919 | : diag::err_typecheck_call_too_many_args_at_most_one) | |||
5920 | << FnKind << FDecl->getParamDecl(0) | |||
5921 | << static_cast<unsigned>(Args.size()) << Fn->getSourceRange() | |||
5922 | << SourceRange(Args[NumParams]->getBeginLoc(), | |||
5923 | Args.back()->getEndLoc()); | |||
5924 | else | |||
5925 | Diag(Args[NumParams]->getBeginLoc(), | |||
5926 | MinArgs == NumParams | |||
5927 | ? diag::err_typecheck_call_too_many_args | |||
5928 | : diag::err_typecheck_call_too_many_args_at_most) | |||
5929 | << FnKind << NumParams << static_cast<unsigned>(Args.size()) | |||
5930 | << Fn->getSourceRange() | |||
5931 | << SourceRange(Args[NumParams]->getBeginLoc(), | |||
5932 | Args.back()->getEndLoc()); | |||
5933 | ||||
5934 | // Emit the location of the prototype. | |||
5935 | if (!TC && FDecl && !FDecl->getBuiltinID() && !IsExecConfig) | |||
5936 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
5937 | ||||
5938 | // This deletes the extra arguments. | |||
5939 | Call->shrinkNumArgs(NumParams); | |||
5940 | return true; | |||
5941 | } | |||
5942 | } | |||
5943 | SmallVector<Expr *, 8> AllArgs; | |||
5944 | VariadicCallType CallType = getVariadicCallType(FDecl, Proto, Fn); | |||
5945 | ||||
5946 | Invalid = GatherArgumentsForCall(Call->getBeginLoc(), FDecl, Proto, 0, Args, | |||
5947 | AllArgs, CallType); | |||
5948 | if (Invalid) | |||
5949 | return true; | |||
5950 | unsigned TotalNumArgs = AllArgs.size(); | |||
5951 | for (unsigned i = 0; i < TotalNumArgs; ++i) | |||
5952 | Call->setArg(i, AllArgs[i]); | |||
5953 | ||||
5954 | Call->computeDependence(); | |||
5955 | return false; | |||
5956 | } | |||
5957 | ||||
5958 | bool Sema::GatherArgumentsForCall(SourceLocation CallLoc, FunctionDecl *FDecl, | |||
5959 | const FunctionProtoType *Proto, | |||
5960 | unsigned FirstParam, ArrayRef<Expr *> Args, | |||
5961 | SmallVectorImpl<Expr *> &AllArgs, | |||
5962 | VariadicCallType CallType, bool AllowExplicit, | |||
5963 | bool IsListInitialization) { | |||
5964 | unsigned NumParams = Proto->getNumParams(); | |||
5965 | bool Invalid = false; | |||
5966 | size_t ArgIx = 0; | |||
5967 | // Continue to check argument types (even if we have too few/many args). | |||
5968 | for (unsigned i = FirstParam; i < NumParams; i++) { | |||
5969 | QualType ProtoArgType = Proto->getParamType(i); | |||
5970 | ||||
5971 | Expr *Arg; | |||
5972 | ParmVarDecl *Param = FDecl ? FDecl->getParamDecl(i) : nullptr; | |||
5973 | if (ArgIx < Args.size()) { | |||
5974 | Arg = Args[ArgIx++]; | |||
5975 | ||||
5976 | if (RequireCompleteType(Arg->getBeginLoc(), ProtoArgType, | |||
5977 | diag::err_call_incomplete_argument, Arg)) | |||
5978 | return true; | |||
5979 | ||||
5980 | // Strip the unbridged-cast placeholder expression off, if applicable. | |||
5981 | bool CFAudited = false; | |||
5982 | if (Arg->getType() == Context.ARCUnbridgedCastTy && | |||
5983 | FDecl && FDecl->hasAttr<CFAuditedTransferAttr>() && | |||
5984 | (!Param || !Param->hasAttr<CFConsumedAttr>())) | |||
5985 | Arg = stripARCUnbridgedCast(Arg); | |||
5986 | else if (getLangOpts().ObjCAutoRefCount && | |||
5987 | FDecl && FDecl->hasAttr<CFAuditedTransferAttr>() && | |||
5988 | (!Param || !Param->hasAttr<CFConsumedAttr>())) | |||
5989 | CFAudited = true; | |||
5990 | ||||
5991 | if (Proto->getExtParameterInfo(i).isNoEscape() && | |||
5992 | ProtoArgType->isBlockPointerType()) | |||
5993 | if (auto *BE = dyn_cast<BlockExpr>(Arg->IgnoreParenNoopCasts(Context))) | |||
5994 | BE->getBlockDecl()->setDoesNotEscape(); | |||
5995 | ||||
5996 | InitializedEntity Entity = | |||
5997 | Param ? InitializedEntity::InitializeParameter(Context, Param, | |||
5998 | ProtoArgType) | |||
5999 | : InitializedEntity::InitializeParameter( | |||
6000 | Context, ProtoArgType, Proto->isParamConsumed(i)); | |||
6001 | ||||
6002 | // Remember that parameter belongs to a CF audited API. | |||
6003 | if (CFAudited) | |||
6004 | Entity.setParameterCFAudited(); | |||
6005 | ||||
6006 | ExprResult ArgE = PerformCopyInitialization( | |||
6007 | Entity, SourceLocation(), Arg, IsListInitialization, AllowExplicit); | |||
6008 | if (ArgE.isInvalid()) | |||
6009 | return true; | |||
6010 | ||||
6011 | Arg = ArgE.getAs<Expr>(); | |||
6012 | } else { | |||
6013 | assert(Param && "can't use default arguments without a known callee")(static_cast <bool> (Param && "can't use default arguments without a known callee" ) ? void (0) : __assert_fail ("Param && \"can't use default arguments without a known callee\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6013, __extension__ __PRETTY_FUNCTION__)); | |||
6014 | ||||
6015 | ExprResult ArgExpr = BuildCXXDefaultArgExpr(CallLoc, FDecl, Param); | |||
6016 | if (ArgExpr.isInvalid()) | |||
6017 | return true; | |||
6018 | ||||
6019 | Arg = ArgExpr.getAs<Expr>(); | |||
6020 | } | |||
6021 | ||||
6022 | // Check for array bounds violations for each argument to the call. This | |||
6023 | // check only triggers warnings when the argument isn't a more complex Expr | |||
6024 | // with its own checking, such as a BinaryOperator. | |||
6025 | CheckArrayAccess(Arg); | |||
6026 | ||||
6027 | // Check for violations of C99 static array rules (C99 6.7.5.3p7). | |||
6028 | CheckStaticArrayArgument(CallLoc, Param, Arg); | |||
6029 | ||||
6030 | AllArgs.push_back(Arg); | |||
6031 | } | |||
6032 | ||||
6033 | // If this is a variadic call, handle args passed through "...". | |||
6034 | if (CallType != VariadicDoesNotApply) { | |||
6035 | // Assume that extern "C" functions with variadic arguments that | |||
6036 | // return __unknown_anytype aren't *really* variadic. | |||
6037 | if (Proto->getReturnType() == Context.UnknownAnyTy && FDecl && | |||
6038 | FDecl->isExternC()) { | |||
6039 | for (Expr *A : Args.slice(ArgIx)) { | |||
6040 | QualType paramType; // ignored | |||
6041 | ExprResult arg = checkUnknownAnyArg(CallLoc, A, paramType); | |||
6042 | Invalid |= arg.isInvalid(); | |||
6043 | AllArgs.push_back(arg.get()); | |||
6044 | } | |||
6045 | ||||
6046 | // Otherwise do argument promotion, (C99 6.5.2.2p7). | |||
6047 | } else { | |||
6048 | for (Expr *A : Args.slice(ArgIx)) { | |||
6049 | ExprResult Arg = DefaultVariadicArgumentPromotion(A, CallType, FDecl); | |||
6050 | Invalid |= Arg.isInvalid(); | |||
6051 | AllArgs.push_back(Arg.get()); | |||
6052 | } | |||
6053 | } | |||
6054 | ||||
6055 | // Check for array bounds violations. | |||
6056 | for (Expr *A : Args.slice(ArgIx)) | |||
6057 | CheckArrayAccess(A); | |||
6058 | } | |||
6059 | return Invalid; | |||
6060 | } | |||
6061 | ||||
6062 | static void DiagnoseCalleeStaticArrayParam(Sema &S, ParmVarDecl *PVD) { | |||
6063 | TypeLoc TL = PVD->getTypeSourceInfo()->getTypeLoc(); | |||
6064 | if (DecayedTypeLoc DTL = TL.getAs<DecayedTypeLoc>()) | |||
6065 | TL = DTL.getOriginalLoc(); | |||
6066 | if (ArrayTypeLoc ATL = TL.getAs<ArrayTypeLoc>()) | |||
6067 | S.Diag(PVD->getLocation(), diag::note_callee_static_array) | |||
6068 | << ATL.getLocalSourceRange(); | |||
6069 | } | |||
6070 | ||||
6071 | /// CheckStaticArrayArgument - If the given argument corresponds to a static | |||
6072 | /// array parameter, check that it is non-null, and that if it is formed by | |||
6073 | /// array-to-pointer decay, the underlying array is sufficiently large. | |||
6074 | /// | |||
6075 | /// C99 6.7.5.3p7: If the keyword static also appears within the [ and ] of the | |||
6076 | /// array type derivation, then for each call to the function, the value of the | |||
6077 | /// corresponding actual argument shall provide access to the first element of | |||
6078 | /// an array with at least as many elements as specified by the size expression. | |||
6079 | void | |||
6080 | Sema::CheckStaticArrayArgument(SourceLocation CallLoc, | |||
6081 | ParmVarDecl *Param, | |||
6082 | const Expr *ArgExpr) { | |||
6083 | // Static array parameters are not supported in C++. | |||
6084 | if (!Param || getLangOpts().CPlusPlus) | |||
6085 | return; | |||
6086 | ||||
6087 | QualType OrigTy = Param->getOriginalType(); | |||
6088 | ||||
6089 | const ArrayType *AT = Context.getAsArrayType(OrigTy); | |||
6090 | if (!AT || AT->getSizeModifier() != ArrayType::Static) | |||
6091 | return; | |||
6092 | ||||
6093 | if (ArgExpr->isNullPointerConstant(Context, | |||
6094 | Expr::NPC_NeverValueDependent)) { | |||
6095 | Diag(CallLoc, diag::warn_null_arg) << ArgExpr->getSourceRange(); | |||
6096 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6097 | return; | |||
6098 | } | |||
6099 | ||||
6100 | const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT); | |||
6101 | if (!CAT) | |||
6102 | return; | |||
6103 | ||||
6104 | const ConstantArrayType *ArgCAT = | |||
6105 | Context.getAsConstantArrayType(ArgExpr->IgnoreParenCasts()->getType()); | |||
6106 | if (!ArgCAT) | |||
6107 | return; | |||
6108 | ||||
6109 | if (getASTContext().hasSameUnqualifiedType(CAT->getElementType(), | |||
6110 | ArgCAT->getElementType())) { | |||
6111 | if (ArgCAT->getSize().ult(CAT->getSize())) { | |||
6112 | Diag(CallLoc, diag::warn_static_array_too_small) | |||
6113 | << ArgExpr->getSourceRange() | |||
6114 | << (unsigned)ArgCAT->getSize().getZExtValue() | |||
6115 | << (unsigned)CAT->getSize().getZExtValue() << 0; | |||
6116 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6117 | } | |||
6118 | return; | |||
6119 | } | |||
6120 | ||||
6121 | Optional<CharUnits> ArgSize = | |||
6122 | getASTContext().getTypeSizeInCharsIfKnown(ArgCAT); | |||
6123 | Optional<CharUnits> ParmSize = getASTContext().getTypeSizeInCharsIfKnown(CAT); | |||
6124 | if (ArgSize && ParmSize && *ArgSize < *ParmSize) { | |||
6125 | Diag(CallLoc, diag::warn_static_array_too_small) | |||
6126 | << ArgExpr->getSourceRange() << (unsigned)ArgSize->getQuantity() | |||
6127 | << (unsigned)ParmSize->getQuantity() << 1; | |||
6128 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6129 | } | |||
6130 | } | |||
6131 | ||||
6132 | /// Given a function expression of unknown-any type, try to rebuild it | |||
6133 | /// to have a function type. | |||
6134 | static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *fn); | |||
6135 | ||||
6136 | /// Is the given type a placeholder that we need to lower out | |||
6137 | /// immediately during argument processing? | |||
6138 | static bool isPlaceholderToRemoveAsArg(QualType type) { | |||
6139 | // Placeholders are never sugared. | |||
6140 | const BuiltinType *placeholder = dyn_cast<BuiltinType>(type); | |||
6141 | if (!placeholder) return false; | |||
6142 | ||||
6143 | switch (placeholder->getKind()) { | |||
6144 | // Ignore all the non-placeholder types. | |||
6145 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
6146 | case BuiltinType::Id: | |||
6147 | #include "clang/Basic/OpenCLImageTypes.def" | |||
6148 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
6149 | case BuiltinType::Id: | |||
6150 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
6151 | // In practice we'll never use this, since all SVE types are sugared | |||
6152 | // via TypedefTypes rather than exposed directly as BuiltinTypes. | |||
6153 | #define SVE_TYPE(Name, Id, SingletonId) \ | |||
6154 | case BuiltinType::Id: | |||
6155 | #include "clang/Basic/AArch64SVEACLETypes.def" | |||
6156 | #define PPC_VECTOR_TYPE(Name, Id, Size) \ | |||
6157 | case BuiltinType::Id: | |||
6158 | #include "clang/Basic/PPCTypes.def" | |||
6159 | #define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
6160 | #include "clang/Basic/RISCVVTypes.def" | |||
6161 | #define PLACEHOLDER_TYPE(ID, SINGLETON_ID) | |||
6162 | #define BUILTIN_TYPE(ID, SINGLETON_ID) case BuiltinType::ID: | |||
6163 | #include "clang/AST/BuiltinTypes.def" | |||
6164 | return false; | |||
6165 | ||||
6166 | // We cannot lower out overload sets; they might validly be resolved | |||
6167 | // by the call machinery. | |||
6168 | case BuiltinType::Overload: | |||
6169 | return false; | |||
6170 | ||||
6171 | // Unbridged casts in ARC can be handled in some call positions and | |||
6172 | // should be left in place. | |||
6173 | case BuiltinType::ARCUnbridgedCast: | |||
6174 | return false; | |||
6175 | ||||
6176 | // Pseudo-objects should be converted as soon as possible. | |||
6177 | case BuiltinType::PseudoObject: | |||
6178 | return true; | |||
6179 | ||||
6180 | // The debugger mode could theoretically but currently does not try | |||
6181 | // to resolve unknown-typed arguments based on known parameter types. | |||
6182 | case BuiltinType::UnknownAny: | |||
6183 | return true; | |||
6184 | ||||
6185 | // These are always invalid as call arguments and should be reported. | |||
6186 | case BuiltinType::BoundMember: | |||
6187 | case BuiltinType::BuiltinFn: | |||
6188 | case BuiltinType::IncompleteMatrixIdx: | |||
6189 | case BuiltinType::OMPArraySection: | |||
6190 | case BuiltinType::OMPArrayShaping: | |||
6191 | case BuiltinType::OMPIterator: | |||
6192 | return true; | |||
6193 | ||||
6194 | } | |||
6195 | llvm_unreachable("bad builtin type kind")::llvm::llvm_unreachable_internal("bad builtin type kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6195); | |||
6196 | } | |||
6197 | ||||
6198 | /// Check an argument list for placeholders that we won't try to | |||
6199 | /// handle later. | |||
6200 | static bool checkArgsForPlaceholders(Sema &S, MultiExprArg args) { | |||
6201 | // Apply this processing to all the arguments at once instead of | |||
6202 | // dying at the first failure. | |||
6203 | bool hasInvalid = false; | |||
6204 | for (size_t i = 0, e = args.size(); i != e; i++) { | |||
6205 | if (isPlaceholderToRemoveAsArg(args[i]->getType())) { | |||
6206 | ExprResult result = S.CheckPlaceholderExpr(args[i]); | |||
6207 | if (result.isInvalid()) hasInvalid = true; | |||
6208 | else args[i] = result.get(); | |||
6209 | } | |||
6210 | } | |||
6211 | return hasInvalid; | |||
6212 | } | |||
6213 | ||||
6214 | /// If a builtin function has a pointer argument with no explicit address | |||
6215 | /// space, then it should be able to accept a pointer to any address | |||
6216 | /// space as input. In order to do this, we need to replace the | |||
6217 | /// standard builtin declaration with one that uses the same address space | |||
6218 | /// as the call. | |||
6219 | /// | |||
6220 | /// \returns nullptr If this builtin is not a candidate for a rewrite i.e. | |||
6221 | /// it does not contain any pointer arguments without | |||
6222 | /// an address space qualifer. Otherwise the rewritten | |||
6223 | /// FunctionDecl is returned. | |||
6224 | /// TODO: Handle pointer return types. | |||
6225 | static FunctionDecl *rewriteBuiltinFunctionDecl(Sema *Sema, ASTContext &Context, | |||
6226 | FunctionDecl *FDecl, | |||
6227 | MultiExprArg ArgExprs) { | |||
6228 | ||||
6229 | QualType DeclType = FDecl->getType(); | |||
6230 | const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(DeclType); | |||
6231 | ||||
6232 | if (!Context.BuiltinInfo.hasPtrArgsOrResult(FDecl->getBuiltinID()) || !FT || | |||
6233 | ArgExprs.size() < FT->getNumParams()) | |||
6234 | return nullptr; | |||
6235 | ||||
6236 | bool NeedsNewDecl = false; | |||
6237 | unsigned i = 0; | |||
6238 | SmallVector<QualType, 8> OverloadParams; | |||
6239 | ||||
6240 | for (QualType ParamType : FT->param_types()) { | |||
6241 | ||||
6242 | // Convert array arguments to pointer to simplify type lookup. | |||
6243 | ExprResult ArgRes = | |||
6244 | Sema->DefaultFunctionArrayLvalueConversion(ArgExprs[i++]); | |||
6245 | if (ArgRes.isInvalid()) | |||
6246 | return nullptr; | |||
6247 | Expr *Arg = ArgRes.get(); | |||
6248 | QualType ArgType = Arg->getType(); | |||
6249 | if (!ParamType->isPointerType() || | |||
6250 | ParamType.hasAddressSpace() || | |||
6251 | !ArgType->isPointerType() || | |||
6252 | !ArgType->getPointeeType().hasAddressSpace()) { | |||
6253 | OverloadParams.push_back(ParamType); | |||
6254 | continue; | |||
6255 | } | |||
6256 | ||||
6257 | QualType PointeeType = ParamType->getPointeeType(); | |||
6258 | if (PointeeType.hasAddressSpace()) | |||
6259 | continue; | |||
6260 | ||||
6261 | NeedsNewDecl = true; | |||
6262 | LangAS AS = ArgType->getPointeeType().getAddressSpace(); | |||
6263 | ||||
6264 | PointeeType = Context.getAddrSpaceQualType(PointeeType, AS); | |||
6265 | OverloadParams.push_back(Context.getPointerType(PointeeType)); | |||
6266 | } | |||
6267 | ||||
6268 | if (!NeedsNewDecl) | |||
6269 | return nullptr; | |||
6270 | ||||
6271 | FunctionProtoType::ExtProtoInfo EPI; | |||
6272 | EPI.Variadic = FT->isVariadic(); | |||
6273 | QualType OverloadTy = Context.getFunctionType(FT->getReturnType(), | |||
6274 | OverloadParams, EPI); | |||
6275 | DeclContext *Parent = FDecl->getParent(); | |||
6276 | FunctionDecl *OverloadDecl = FunctionDecl::Create( | |||
6277 | Context, Parent, FDecl->getLocation(), FDecl->getLocation(), | |||
6278 | FDecl->getIdentifier(), OverloadTy, | |||
6279 | /*TInfo=*/nullptr, SC_Extern, Sema->getCurFPFeatures().isFPConstrained(), | |||
6280 | false, | |||
6281 | /*hasPrototype=*/true); | |||
6282 | SmallVector<ParmVarDecl*, 16> Params; | |||
6283 | FT = cast<FunctionProtoType>(OverloadTy); | |||
6284 | for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) { | |||
6285 | QualType ParamType = FT->getParamType(i); | |||
6286 | ParmVarDecl *Parm = | |||
6287 | ParmVarDecl::Create(Context, OverloadDecl, SourceLocation(), | |||
6288 | SourceLocation(), nullptr, ParamType, | |||
6289 | /*TInfo=*/nullptr, SC_None, nullptr); | |||
6290 | Parm->setScopeInfo(0, i); | |||
6291 | Params.push_back(Parm); | |||
6292 | } | |||
6293 | OverloadDecl->setParams(Params); | |||
6294 | Sema->mergeDeclAttributes(OverloadDecl, FDecl); | |||
6295 | return OverloadDecl; | |||
6296 | } | |||
6297 | ||||
6298 | static void checkDirectCallValidity(Sema &S, const Expr *Fn, | |||
6299 | FunctionDecl *Callee, | |||
6300 | MultiExprArg ArgExprs) { | |||
6301 | // `Callee` (when called with ArgExprs) may be ill-formed. enable_if (and | |||
6302 | // similar attributes) really don't like it when functions are called with an | |||
6303 | // invalid number of args. | |||
6304 | if (S.TooManyArguments(Callee->getNumParams(), ArgExprs.size(), | |||
6305 | /*PartialOverloading=*/false) && | |||
6306 | !Callee->isVariadic()) | |||
6307 | return; | |||
6308 | if (Callee->getMinRequiredArguments() > ArgExprs.size()) | |||
6309 | return; | |||
6310 | ||||
6311 | if (const EnableIfAttr *Attr = | |||
6312 | S.CheckEnableIf(Callee, Fn->getBeginLoc(), ArgExprs, true)) { | |||
6313 | S.Diag(Fn->getBeginLoc(), | |||
6314 | isa<CXXMethodDecl>(Callee) | |||
6315 | ? diag::err_ovl_no_viable_member_function_in_call | |||
6316 | : diag::err_ovl_no_viable_function_in_call) | |||
6317 | << Callee << Callee->getSourceRange(); | |||
6318 | S.Diag(Callee->getLocation(), | |||
6319 | diag::note_ovl_candidate_disabled_by_function_cond_attr) | |||
6320 | << Attr->getCond()->getSourceRange() << Attr->getMessage(); | |||
6321 | return; | |||
6322 | } | |||
6323 | } | |||
6324 | ||||
6325 | static bool enclosingClassIsRelatedToClassInWhichMembersWereFound( | |||
6326 | const UnresolvedMemberExpr *const UME, Sema &S) { | |||
6327 | ||||
6328 | const auto GetFunctionLevelDCIfCXXClass = | |||
6329 | [](Sema &S) -> const CXXRecordDecl * { | |||
6330 | const DeclContext *const DC = S.getFunctionLevelDeclContext(); | |||
6331 | if (!DC || !DC->getParent()) | |||
6332 | return nullptr; | |||
6333 | ||||
6334 | // If the call to some member function was made from within a member | |||
6335 | // function body 'M' return return 'M's parent. | |||
6336 | if (const auto *MD = dyn_cast<CXXMethodDecl>(DC)) | |||
6337 | return MD->getParent()->getCanonicalDecl(); | |||
6338 | // else the call was made from within a default member initializer of a | |||
6339 | // class, so return the class. | |||
6340 | if (const auto *RD = dyn_cast<CXXRecordDecl>(DC)) | |||
6341 | return RD->getCanonicalDecl(); | |||
6342 | return nullptr; | |||
6343 | }; | |||
6344 | // If our DeclContext is neither a member function nor a class (in the | |||
6345 | // case of a lambda in a default member initializer), we can't have an | |||
6346 | // enclosing 'this'. | |||
6347 | ||||
6348 | const CXXRecordDecl *const CurParentClass = GetFunctionLevelDCIfCXXClass(S); | |||
6349 | if (!CurParentClass) | |||
6350 | return false; | |||
6351 | ||||
6352 | // The naming class for implicit member functions call is the class in which | |||
6353 | // name lookup starts. | |||
6354 | const CXXRecordDecl *const NamingClass = | |||
6355 | UME->getNamingClass()->getCanonicalDecl(); | |||
6356 | assert(NamingClass && "Must have naming class even for implicit access")(static_cast <bool> (NamingClass && "Must have naming class even for implicit access" ) ? void (0) : __assert_fail ("NamingClass && \"Must have naming class even for implicit access\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6356, __extension__ __PRETTY_FUNCTION__)); | |||
6357 | ||||
6358 | // If the unresolved member functions were found in a 'naming class' that is | |||
6359 | // related (either the same or derived from) to the class that contains the | |||
6360 | // member function that itself contained the implicit member access. | |||
6361 | ||||
6362 | return CurParentClass == NamingClass || | |||
6363 | CurParentClass->isDerivedFrom(NamingClass); | |||
6364 | } | |||
6365 | ||||
6366 | static void | |||
6367 | tryImplicitlyCaptureThisIfImplicitMemberFunctionAccessWithDependentArgs( | |||
6368 | Sema &S, const UnresolvedMemberExpr *const UME, SourceLocation CallLoc) { | |||
6369 | ||||
6370 | if (!UME) | |||
6371 | return; | |||
6372 | ||||
6373 | LambdaScopeInfo *const CurLSI = S.getCurLambda(); | |||
6374 | // Only try and implicitly capture 'this' within a C++ Lambda if it hasn't | |||
6375 | // already been captured, or if this is an implicit member function call (if | |||
6376 | // it isn't, an attempt to capture 'this' should already have been made). | |||
6377 | if (!CurLSI || CurLSI->ImpCaptureStyle == CurLSI->ImpCap_None || | |||
6378 | !UME->isImplicitAccess() || CurLSI->isCXXThisCaptured()) | |||
6379 | return; | |||
6380 | ||||
6381 | // Check if the naming class in which the unresolved members were found is | |||
6382 | // related (same as or is a base of) to the enclosing class. | |||
6383 | ||||
6384 | if (!enclosingClassIsRelatedToClassInWhichMembersWereFound(UME, S)) | |||
6385 | return; | |||
6386 | ||||
6387 | ||||
6388 | DeclContext *EnclosingFunctionCtx = S.CurContext->getParent()->getParent(); | |||
6389 | // If the enclosing function is not dependent, then this lambda is | |||
6390 | // capture ready, so if we can capture this, do so. | |||
6391 | if (!EnclosingFunctionCtx->isDependentContext()) { | |||
6392 | // If the current lambda and all enclosing lambdas can capture 'this' - | |||
6393 | // then go ahead and capture 'this' (since our unresolved overload set | |||
6394 | // contains at least one non-static member function). | |||
6395 | if (!S.CheckCXXThisCapture(CallLoc, /*Explcit*/ false, /*Diagnose*/ false)) | |||
6396 | S.CheckCXXThisCapture(CallLoc); | |||
6397 | } else if (S.CurContext->isDependentContext()) { | |||
6398 | // ... since this is an implicit member reference, that might potentially | |||
6399 | // involve a 'this' capture, mark 'this' for potential capture in | |||
6400 | // enclosing lambdas. | |||
6401 | if (CurLSI->ImpCaptureStyle != CurLSI->ImpCap_None) | |||
6402 | CurLSI->addPotentialThisCapture(CallLoc); | |||
6403 | } | |||
6404 | } | |||
6405 | ||||
6406 | ExprResult Sema::ActOnCallExpr(Scope *Scope, Expr *Fn, SourceLocation LParenLoc, | |||
6407 | MultiExprArg ArgExprs, SourceLocation RParenLoc, | |||
6408 | Expr *ExecConfig) { | |||
6409 | ExprResult Call = | |||
6410 | BuildCallExpr(Scope, Fn, LParenLoc, ArgExprs, RParenLoc, ExecConfig, | |||
6411 | /*IsExecConfig=*/false, /*AllowRecovery=*/true); | |||
6412 | if (Call.isInvalid()) | |||
6413 | return Call; | |||
6414 | ||||
6415 | // Diagnose uses of the C++20 "ADL-only template-id call" feature in earlier | |||
6416 | // language modes. | |||
6417 | if (auto *ULE = dyn_cast<UnresolvedLookupExpr>(Fn)) { | |||
6418 | if (ULE->hasExplicitTemplateArgs() && | |||
6419 | ULE->decls_begin() == ULE->decls_end()) { | |||
6420 | Diag(Fn->getExprLoc(), getLangOpts().CPlusPlus20 | |||
6421 | ? diag::warn_cxx17_compat_adl_only_template_id | |||
6422 | : diag::ext_adl_only_template_id) | |||
6423 | << ULE->getName(); | |||
6424 | } | |||
6425 | } | |||
6426 | ||||
6427 | if (LangOpts.OpenMP) | |||
6428 | Call = ActOnOpenMPCall(Call, Scope, LParenLoc, ArgExprs, RParenLoc, | |||
6429 | ExecConfig); | |||
6430 | ||||
6431 | return Call; | |||
6432 | } | |||
6433 | ||||
6434 | /// BuildCallExpr - Handle a call to Fn with the specified array of arguments. | |||
6435 | /// This provides the location of the left/right parens and a list of comma | |||
6436 | /// locations. | |||
6437 | ExprResult Sema::BuildCallExpr(Scope *Scope, Expr *Fn, SourceLocation LParenLoc, | |||
6438 | MultiExprArg ArgExprs, SourceLocation RParenLoc, | |||
6439 | Expr *ExecConfig, bool IsExecConfig, | |||
6440 | bool AllowRecovery) { | |||
6441 | // Since this might be a postfix expression, get rid of ParenListExprs. | |||
6442 | ExprResult Result = MaybeConvertParenListExprToParenExpr(Scope, Fn); | |||
6443 | if (Result.isInvalid()) return ExprError(); | |||
6444 | Fn = Result.get(); | |||
6445 | ||||
6446 | if (checkArgsForPlaceholders(*this, ArgExprs)) | |||
6447 | return ExprError(); | |||
6448 | ||||
6449 | if (getLangOpts().CPlusPlus) { | |||
6450 | // If this is a pseudo-destructor expression, build the call immediately. | |||
6451 | if (isa<CXXPseudoDestructorExpr>(Fn)) { | |||
6452 | if (!ArgExprs.empty()) { | |||
6453 | // Pseudo-destructor calls should not have any arguments. | |||
6454 | Diag(Fn->getBeginLoc(), diag::err_pseudo_dtor_call_with_args) | |||
6455 | << FixItHint::CreateRemoval( | |||
6456 | SourceRange(ArgExprs.front()->getBeginLoc(), | |||
6457 | ArgExprs.back()->getEndLoc())); | |||
6458 | } | |||
6459 | ||||
6460 | return CallExpr::Create(Context, Fn, /*Args=*/{}, Context.VoidTy, | |||
6461 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6462 | } | |||
6463 | if (Fn->getType() == Context.PseudoObjectTy) { | |||
6464 | ExprResult result = CheckPlaceholderExpr(Fn); | |||
6465 | if (result.isInvalid()) return ExprError(); | |||
6466 | Fn = result.get(); | |||
6467 | } | |||
6468 | ||||
6469 | // Determine whether this is a dependent call inside a C++ template, | |||
6470 | // in which case we won't do any semantic analysis now. | |||
6471 | if (Fn->isTypeDependent() || Expr::hasAnyTypeDependentArguments(ArgExprs)) { | |||
6472 | if (ExecConfig) { | |||
6473 | return CUDAKernelCallExpr::Create(Context, Fn, | |||
6474 | cast<CallExpr>(ExecConfig), ArgExprs, | |||
6475 | Context.DependentTy, VK_PRValue, | |||
6476 | RParenLoc, CurFPFeatureOverrides()); | |||
6477 | } else { | |||
6478 | ||||
6479 | tryImplicitlyCaptureThisIfImplicitMemberFunctionAccessWithDependentArgs( | |||
6480 | *this, dyn_cast<UnresolvedMemberExpr>(Fn->IgnoreParens()), | |||
6481 | Fn->getBeginLoc()); | |||
6482 | ||||
6483 | return CallExpr::Create(Context, Fn, ArgExprs, Context.DependentTy, | |||
6484 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6485 | } | |||
6486 | } | |||
6487 | ||||
6488 | // Determine whether this is a call to an object (C++ [over.call.object]). | |||
6489 | if (Fn->getType()->isRecordType()) | |||
6490 | return BuildCallToObjectOfClassType(Scope, Fn, LParenLoc, ArgExprs, | |||
6491 | RParenLoc); | |||
6492 | ||||
6493 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
6494 | ExprResult result = rebuildUnknownAnyFunction(*this, Fn); | |||
6495 | if (result.isInvalid()) return ExprError(); | |||
6496 | Fn = result.get(); | |||
6497 | } | |||
6498 | ||||
6499 | if (Fn->getType() == Context.BoundMemberTy) { | |||
6500 | return BuildCallToMemberFunction(Scope, Fn, LParenLoc, ArgExprs, | |||
6501 | RParenLoc, AllowRecovery); | |||
6502 | } | |||
6503 | } | |||
6504 | ||||
6505 | // Check for overloaded calls. This can happen even in C due to extensions. | |||
6506 | if (Fn->getType() == Context.OverloadTy) { | |||
6507 | OverloadExpr::FindResult find = OverloadExpr::find(Fn); | |||
6508 | ||||
6509 | // We aren't supposed to apply this logic if there's an '&' involved. | |||
6510 | if (!find.HasFormOfMemberPointer) { | |||
6511 | if (Expr::hasAnyTypeDependentArguments(ArgExprs)) | |||
6512 | return CallExpr::Create(Context, Fn, ArgExprs, Context.DependentTy, | |||
6513 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6514 | OverloadExpr *ovl = find.Expression; | |||
6515 | if (UnresolvedLookupExpr *ULE = dyn_cast<UnresolvedLookupExpr>(ovl)) | |||
6516 | return BuildOverloadedCallExpr( | |||
6517 | Scope, Fn, ULE, LParenLoc, ArgExprs, RParenLoc, ExecConfig, | |||
6518 | /*AllowTypoCorrection=*/true, find.IsAddressOfOperand); | |||
6519 | return BuildCallToMemberFunction(Scope, Fn, LParenLoc, ArgExprs, | |||
6520 | RParenLoc, AllowRecovery); | |||
6521 | } | |||
6522 | } | |||
6523 | ||||
6524 | // If we're directly calling a function, get the appropriate declaration. | |||
6525 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
6526 | ExprResult result = rebuildUnknownAnyFunction(*this, Fn); | |||
6527 | if (result.isInvalid()) return ExprError(); | |||
6528 | Fn = result.get(); | |||
6529 | } | |||
6530 | ||||
6531 | Expr *NakedFn = Fn->IgnoreParens(); | |||
6532 | ||||
6533 | bool CallingNDeclIndirectly = false; | |||
6534 | NamedDecl *NDecl = nullptr; | |||
6535 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(NakedFn)) { | |||
6536 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
6537 | CallingNDeclIndirectly = true; | |||
6538 | NakedFn = UnOp->getSubExpr()->IgnoreParens(); | |||
6539 | } | |||
6540 | } | |||
6541 | ||||
6542 | if (auto *DRE = dyn_cast<DeclRefExpr>(NakedFn)) { | |||
6543 | NDecl = DRE->getDecl(); | |||
6544 | ||||
6545 | FunctionDecl *FDecl = dyn_cast<FunctionDecl>(NDecl); | |||
6546 | if (FDecl && FDecl->getBuiltinID()) { | |||
6547 | // Rewrite the function decl for this builtin by replacing parameters | |||
6548 | // with no explicit address space with the address space of the arguments | |||
6549 | // in ArgExprs. | |||
6550 | if ((FDecl = | |||
6551 | rewriteBuiltinFunctionDecl(this, Context, FDecl, ArgExprs))) { | |||
6552 | NDecl = FDecl; | |||
6553 | Fn = DeclRefExpr::Create( | |||
6554 | Context, FDecl->getQualifierLoc(), SourceLocation(), FDecl, false, | |||
6555 | SourceLocation(), FDecl->getType(), Fn->getValueKind(), FDecl, | |||
6556 | nullptr, DRE->isNonOdrUse()); | |||
6557 | } | |||
6558 | } | |||
6559 | } else if (isa<MemberExpr>(NakedFn)) | |||
6560 | NDecl = cast<MemberExpr>(NakedFn)->getMemberDecl(); | |||
6561 | ||||
6562 | if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(NDecl)) { | |||
6563 | if (CallingNDeclIndirectly && !checkAddressOfFunctionIsAvailable( | |||
6564 | FD, /*Complain=*/true, Fn->getBeginLoc())) | |||
6565 | return ExprError(); | |||
6566 | ||||
6567 | checkDirectCallValidity(*this, Fn, FD, ArgExprs); | |||
6568 | ||||
6569 | // If this expression is a call to a builtin function in HIP device | |||
6570 | // compilation, allow a pointer-type argument to default address space to be | |||
6571 | // passed as a pointer-type parameter to a non-default address space. | |||
6572 | // If Arg is declared in the default address space and Param is declared | |||
6573 | // in a non-default address space, perform an implicit address space cast to | |||
6574 | // the parameter type. | |||
6575 | if (getLangOpts().HIP && getLangOpts().CUDAIsDevice && FD && | |||
6576 | FD->getBuiltinID()) { | |||
6577 | for (unsigned Idx = 0; Idx < FD->param_size(); ++Idx) { | |||
6578 | ParmVarDecl *Param = FD->getParamDecl(Idx); | |||
6579 | if (!ArgExprs[Idx] || !Param || !Param->getType()->isPointerType() || | |||
6580 | !ArgExprs[Idx]->getType()->isPointerType()) | |||
6581 | continue; | |||
6582 | ||||
6583 | auto ParamAS = Param->getType()->getPointeeType().getAddressSpace(); | |||
6584 | auto ArgTy = ArgExprs[Idx]->getType(); | |||
6585 | auto ArgPtTy = ArgTy->getPointeeType(); | |||
6586 | auto ArgAS = ArgPtTy.getAddressSpace(); | |||
6587 | ||||
6588 | // Only allow implicit casting from a non-default address space pointee | |||
6589 | // type to a default address space pointee type | |||
6590 | if (ArgAS != LangAS::Default || ParamAS == LangAS::Default) | |||
6591 | continue; | |||
6592 | ||||
6593 | // First, ensure that the Arg is an RValue. | |||
6594 | if (ArgExprs[Idx]->isGLValue()) { | |||
6595 | ArgExprs[Idx] = ImplicitCastExpr::Create( | |||
6596 | Context, ArgExprs[Idx]->getType(), CK_NoOp, ArgExprs[Idx], | |||
6597 | nullptr, VK_PRValue, FPOptionsOverride()); | |||
6598 | } | |||
6599 | ||||
6600 | // Construct a new arg type with address space of Param | |||
6601 | Qualifiers ArgPtQuals = ArgPtTy.getQualifiers(); | |||
6602 | ArgPtQuals.setAddressSpace(ParamAS); | |||
6603 | auto NewArgPtTy = | |||
6604 | Context.getQualifiedType(ArgPtTy.getUnqualifiedType(), ArgPtQuals); | |||
6605 | auto NewArgTy = | |||
6606 | Context.getQualifiedType(Context.getPointerType(NewArgPtTy), | |||
6607 | ArgTy.getQualifiers()); | |||
6608 | ||||
6609 | // Finally perform an implicit address space cast | |||
6610 | ArgExprs[Idx] = ImpCastExprToType(ArgExprs[Idx], NewArgTy, | |||
6611 | CK_AddressSpaceConversion) | |||
6612 | .get(); | |||
6613 | } | |||
6614 | } | |||
6615 | } | |||
6616 | ||||
6617 | if (Context.isDependenceAllowed() && | |||
6618 | (Fn->isTypeDependent() || Expr::hasAnyTypeDependentArguments(ArgExprs))) { | |||
6619 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6619, __extension__ __PRETTY_FUNCTION__)); | |||
6620 | assert((Fn->containsErrors() ||(static_cast <bool> ((Fn->containsErrors() || llvm:: any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors (); })) && "should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(Fn->containsErrors() || llvm::any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors(); })) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6623, __extension__ __PRETTY_FUNCTION__)) | |||
6621 | llvm::any_of(ArgExprs,(static_cast <bool> ((Fn->containsErrors() || llvm:: any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors (); })) && "should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(Fn->containsErrors() || llvm::any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors(); })) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6623, __extension__ __PRETTY_FUNCTION__)) | |||
6622 | [](clang::Expr *E) { return E->containsErrors(); })) &&(static_cast <bool> ((Fn->containsErrors() || llvm:: any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors (); })) && "should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(Fn->containsErrors() || llvm::any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors(); })) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6623, __extension__ __PRETTY_FUNCTION__)) | |||
6623 | "should only occur in error-recovery path.")(static_cast <bool> ((Fn->containsErrors() || llvm:: any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors (); })) && "should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(Fn->containsErrors() || llvm::any_of(ArgExprs, [](clang::Expr *E) { return E->containsErrors(); })) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6623, __extension__ __PRETTY_FUNCTION__)); | |||
6624 | QualType ReturnType = | |||
6625 | llvm::isa_and_nonnull<FunctionDecl>(NDecl) | |||
6626 | ? cast<FunctionDecl>(NDecl)->getCallResultType() | |||
6627 | : Context.DependentTy; | |||
6628 | return CallExpr::Create(Context, Fn, ArgExprs, ReturnType, | |||
6629 | Expr::getValueKindForType(ReturnType), RParenLoc, | |||
6630 | CurFPFeatureOverrides()); | |||
6631 | } | |||
6632 | return BuildResolvedCallExpr(Fn, NDecl, LParenLoc, ArgExprs, RParenLoc, | |||
6633 | ExecConfig, IsExecConfig); | |||
6634 | } | |||
6635 | ||||
6636 | /// BuildBuiltinCallExpr - Create a call to a builtin function specified by Id | |||
6637 | // with the specified CallArgs | |||
6638 | Expr *Sema::BuildBuiltinCallExpr(SourceLocation Loc, Builtin::ID Id, | |||
6639 | MultiExprArg CallArgs) { | |||
6640 | StringRef Name = Context.BuiltinInfo.getName(Id); | |||
6641 | LookupResult R(*this, &Context.Idents.get(Name), Loc, | |||
6642 | Sema::LookupOrdinaryName); | |||
6643 | LookupName(R, TUScope, /*AllowBuiltinCreation=*/true); | |||
6644 | ||||
6645 | auto *BuiltInDecl = R.getAsSingle<FunctionDecl>(); | |||
6646 | assert(BuiltInDecl && "failed to find builtin declaration")(static_cast <bool> (BuiltInDecl && "failed to find builtin declaration" ) ? void (0) : __assert_fail ("BuiltInDecl && \"failed to find builtin declaration\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6646, __extension__ __PRETTY_FUNCTION__)); | |||
6647 | ||||
6648 | ExprResult DeclRef = | |||
6649 | BuildDeclRefExpr(BuiltInDecl, BuiltInDecl->getType(), VK_LValue, Loc); | |||
6650 | assert(DeclRef.isUsable() && "Builtin reference cannot fail")(static_cast <bool> (DeclRef.isUsable() && "Builtin reference cannot fail" ) ? void (0) : __assert_fail ("DeclRef.isUsable() && \"Builtin reference cannot fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6650, __extension__ __PRETTY_FUNCTION__)); | |||
6651 | ||||
6652 | ExprResult Call = | |||
6653 | BuildCallExpr(/*Scope=*/nullptr, DeclRef.get(), Loc, CallArgs, Loc); | |||
6654 | ||||
6655 | assert(!Call.isInvalid() && "Call to builtin cannot fail!")(static_cast <bool> (!Call.isInvalid() && "Call to builtin cannot fail!" ) ? void (0) : __assert_fail ("!Call.isInvalid() && \"Call to builtin cannot fail!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6655, __extension__ __PRETTY_FUNCTION__)); | |||
6656 | return Call.get(); | |||
6657 | } | |||
6658 | ||||
6659 | /// Parse a __builtin_astype expression. | |||
6660 | /// | |||
6661 | /// __builtin_astype( value, dst type ) | |||
6662 | /// | |||
6663 | ExprResult Sema::ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, | |||
6664 | SourceLocation BuiltinLoc, | |||
6665 | SourceLocation RParenLoc) { | |||
6666 | QualType DstTy = GetTypeFromParser(ParsedDestTy); | |||
6667 | return BuildAsTypeExpr(E, DstTy, BuiltinLoc, RParenLoc); | |||
6668 | } | |||
6669 | ||||
6670 | /// Create a new AsTypeExpr node (bitcast) from the arguments. | |||
6671 | ExprResult Sema::BuildAsTypeExpr(Expr *E, QualType DestTy, | |||
6672 | SourceLocation BuiltinLoc, | |||
6673 | SourceLocation RParenLoc) { | |||
6674 | ExprValueKind VK = VK_PRValue; | |||
6675 | ExprObjectKind OK = OK_Ordinary; | |||
6676 | QualType SrcTy = E->getType(); | |||
6677 | if (!SrcTy->isDependentType() && | |||
6678 | Context.getTypeSize(DestTy) != Context.getTypeSize(SrcTy)) | |||
6679 | return ExprError( | |||
6680 | Diag(BuiltinLoc, diag::err_invalid_astype_of_different_size) | |||
6681 | << DestTy << SrcTy << E->getSourceRange()); | |||
6682 | return new (Context) AsTypeExpr(E, DestTy, VK, OK, BuiltinLoc, RParenLoc); | |||
6683 | } | |||
6684 | ||||
6685 | /// ActOnConvertVectorExpr - create a new convert-vector expression from the | |||
6686 | /// provided arguments. | |||
6687 | /// | |||
6688 | /// __builtin_convertvector( value, dst type ) | |||
6689 | /// | |||
6690 | ExprResult Sema::ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy, | |||
6691 | SourceLocation BuiltinLoc, | |||
6692 | SourceLocation RParenLoc) { | |||
6693 | TypeSourceInfo *TInfo; | |||
6694 | GetTypeFromParser(ParsedDestTy, &TInfo); | |||
6695 | return SemaConvertVectorExpr(E, TInfo, BuiltinLoc, RParenLoc); | |||
6696 | } | |||
6697 | ||||
6698 | /// BuildResolvedCallExpr - Build a call to a resolved expression, | |||
6699 | /// i.e. an expression not of \p OverloadTy. The expression should | |||
6700 | /// unary-convert to an expression of function-pointer or | |||
6701 | /// block-pointer type. | |||
6702 | /// | |||
6703 | /// \param NDecl the declaration being called, if available | |||
6704 | ExprResult Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, | |||
6705 | SourceLocation LParenLoc, | |||
6706 | ArrayRef<Expr *> Args, | |||
6707 | SourceLocation RParenLoc, Expr *Config, | |||
6708 | bool IsExecConfig, ADLCallKind UsesADL) { | |||
6709 | FunctionDecl *FDecl = dyn_cast_or_null<FunctionDecl>(NDecl); | |||
6710 | unsigned BuiltinID = (FDecl ? FDecl->getBuiltinID() : 0); | |||
6711 | ||||
6712 | // Functions with 'interrupt' attribute cannot be called directly. | |||
6713 | if (FDecl && FDecl->hasAttr<AnyX86InterruptAttr>()) { | |||
6714 | Diag(Fn->getExprLoc(), diag::err_anyx86_interrupt_called); | |||
6715 | return ExprError(); | |||
6716 | } | |||
6717 | ||||
6718 | // Interrupt handlers don't save off the VFP regs automatically on ARM, | |||
6719 | // so there's some risk when calling out to non-interrupt handler functions | |||
6720 | // that the callee might not preserve them. This is easy to diagnose here, | |||
6721 | // but can be very challenging to debug. | |||
6722 | // Likewise, X86 interrupt handlers may only call routines with attribute | |||
6723 | // no_caller_saved_registers since there is no efficient way to | |||
6724 | // save and restore the non-GPR state. | |||
6725 | if (auto *Caller = getCurFunctionDecl()) { | |||
6726 | if (Caller->hasAttr<ARMInterruptAttr>()) { | |||
6727 | bool VFP = Context.getTargetInfo().hasFeature("vfp"); | |||
6728 | if (VFP && (!FDecl || !FDecl->hasAttr<ARMInterruptAttr>())) { | |||
6729 | Diag(Fn->getExprLoc(), diag::warn_arm_interrupt_calling_convention); | |||
6730 | if (FDecl) | |||
6731 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
6732 | } | |||
6733 | } | |||
6734 | if (Caller->hasAttr<AnyX86InterruptAttr>() && | |||
6735 | ((!FDecl || !FDecl->hasAttr<AnyX86NoCallerSavedRegistersAttr>()))) { | |||
6736 | Diag(Fn->getExprLoc(), diag::warn_anyx86_interrupt_regsave); | |||
6737 | if (FDecl) | |||
6738 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
6739 | } | |||
6740 | } | |||
6741 | ||||
6742 | // Promote the function operand. | |||
6743 | // We special-case function promotion here because we only allow promoting | |||
6744 | // builtin functions to function pointers in the callee of a call. | |||
6745 | ExprResult Result; | |||
6746 | QualType ResultTy; | |||
6747 | if (BuiltinID && | |||
6748 | Fn->getType()->isSpecificBuiltinType(BuiltinType::BuiltinFn)) { | |||
6749 | // Extract the return type from the (builtin) function pointer type. | |||
6750 | // FIXME Several builtins still have setType in | |||
6751 | // Sema::CheckBuiltinFunctionCall. One should review their definitions in | |||
6752 | // Builtins.def to ensure they are correct before removing setType calls. | |||
6753 | QualType FnPtrTy = Context.getPointerType(FDecl->getType()); | |||
6754 | Result = ImpCastExprToType(Fn, FnPtrTy, CK_BuiltinFnToFnPtr).get(); | |||
6755 | ResultTy = FDecl->getCallResultType(); | |||
6756 | } else { | |||
6757 | Result = CallExprUnaryConversions(Fn); | |||
6758 | ResultTy = Context.BoolTy; | |||
6759 | } | |||
6760 | if (Result.isInvalid()) | |||
6761 | return ExprError(); | |||
6762 | Fn = Result.get(); | |||
6763 | ||||
6764 | // Check for a valid function type, but only if it is not a builtin which | |||
6765 | // requires custom type checking. These will be handled by | |||
6766 | // CheckBuiltinFunctionCall below just after creation of the call expression. | |||
6767 | const FunctionType *FuncT = nullptr; | |||
6768 | if (!BuiltinID || !Context.BuiltinInfo.hasCustomTypechecking(BuiltinID)) { | |||
6769 | retry: | |||
6770 | if (const PointerType *PT = Fn->getType()->getAs<PointerType>()) { | |||
6771 | // C99 6.5.2.2p1 - "The expression that denotes the called function shall | |||
6772 | // have type pointer to function". | |||
6773 | FuncT = PT->getPointeeType()->getAs<FunctionType>(); | |||
6774 | if (!FuncT) | |||
6775 | return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function) | |||
6776 | << Fn->getType() << Fn->getSourceRange()); | |||
6777 | } else if (const BlockPointerType *BPT = | |||
6778 | Fn->getType()->getAs<BlockPointerType>()) { | |||
6779 | FuncT = BPT->getPointeeType()->castAs<FunctionType>(); | |||
6780 | } else { | |||
6781 | // Handle calls to expressions of unknown-any type. | |||
6782 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
6783 | ExprResult rewrite = rebuildUnknownAnyFunction(*this, Fn); | |||
6784 | if (rewrite.isInvalid()) | |||
6785 | return ExprError(); | |||
6786 | Fn = rewrite.get(); | |||
6787 | goto retry; | |||
6788 | } | |||
6789 | ||||
6790 | return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function) | |||
6791 | << Fn->getType() << Fn->getSourceRange()); | |||
6792 | } | |||
6793 | } | |||
6794 | ||||
6795 | // Get the number of parameters in the function prototype, if any. | |||
6796 | // We will allocate space for max(Args.size(), NumParams) arguments | |||
6797 | // in the call expression. | |||
6798 | const auto *Proto = dyn_cast_or_null<FunctionProtoType>(FuncT); | |||
6799 | unsigned NumParams = Proto ? Proto->getNumParams() : 0; | |||
6800 | ||||
6801 | CallExpr *TheCall; | |||
6802 | if (Config) { | |||
6803 | assert(UsesADL == ADLCallKind::NotADL &&(static_cast <bool> (UsesADL == ADLCallKind::NotADL && "CUDAKernelCallExpr should not use ADL") ? void (0) : __assert_fail ("UsesADL == ADLCallKind::NotADL && \"CUDAKernelCallExpr should not use ADL\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6804, __extension__ __PRETTY_FUNCTION__)) | |||
6804 | "CUDAKernelCallExpr should not use ADL")(static_cast <bool> (UsesADL == ADLCallKind::NotADL && "CUDAKernelCallExpr should not use ADL") ? void (0) : __assert_fail ("UsesADL == ADLCallKind::NotADL && \"CUDAKernelCallExpr should not use ADL\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6804, __extension__ __PRETTY_FUNCTION__)); | |||
6805 | TheCall = CUDAKernelCallExpr::Create(Context, Fn, cast<CallExpr>(Config), | |||
6806 | Args, ResultTy, VK_PRValue, RParenLoc, | |||
6807 | CurFPFeatureOverrides(), NumParams); | |||
6808 | } else { | |||
6809 | TheCall = | |||
6810 | CallExpr::Create(Context, Fn, Args, ResultTy, VK_PRValue, RParenLoc, | |||
6811 | CurFPFeatureOverrides(), NumParams, UsesADL); | |||
6812 | } | |||
6813 | ||||
6814 | if (!Context.isDependenceAllowed()) { | |||
6815 | // Forget about the nulled arguments since typo correction | |||
6816 | // do not handle them well. | |||
6817 | TheCall->shrinkNumArgs(Args.size()); | |||
6818 | // C cannot always handle TypoExpr nodes in builtin calls and direct | |||
6819 | // function calls as their argument checking don't necessarily handle | |||
6820 | // dependent types properly, so make sure any TypoExprs have been | |||
6821 | // dealt with. | |||
6822 | ExprResult Result = CorrectDelayedTyposInExpr(TheCall); | |||
6823 | if (!Result.isUsable()) return ExprError(); | |||
6824 | CallExpr *TheOldCall = TheCall; | |||
6825 | TheCall = dyn_cast<CallExpr>(Result.get()); | |||
6826 | bool CorrectedTypos = TheCall != TheOldCall; | |||
6827 | if (!TheCall) return Result; | |||
6828 | Args = llvm::makeArrayRef(TheCall->getArgs(), TheCall->getNumArgs()); | |||
6829 | ||||
6830 | // A new call expression node was created if some typos were corrected. | |||
6831 | // However it may not have been constructed with enough storage. In this | |||
6832 | // case, rebuild the node with enough storage. The waste of space is | |||
6833 | // immaterial since this only happens when some typos were corrected. | |||
6834 | if (CorrectedTypos && Args.size() < NumParams) { | |||
6835 | if (Config) | |||
6836 | TheCall = CUDAKernelCallExpr::Create( | |||
6837 | Context, Fn, cast<CallExpr>(Config), Args, ResultTy, VK_PRValue, | |||
6838 | RParenLoc, CurFPFeatureOverrides(), NumParams); | |||
6839 | else | |||
6840 | TheCall = | |||
6841 | CallExpr::Create(Context, Fn, Args, ResultTy, VK_PRValue, RParenLoc, | |||
6842 | CurFPFeatureOverrides(), NumParams, UsesADL); | |||
6843 | } | |||
6844 | // We can now handle the nulled arguments for the default arguments. | |||
6845 | TheCall->setNumArgsUnsafe(std::max<unsigned>(Args.size(), NumParams)); | |||
6846 | } | |||
6847 | ||||
6848 | // Bail out early if calling a builtin with custom type checking. | |||
6849 | if (BuiltinID && Context.BuiltinInfo.hasCustomTypechecking(BuiltinID)) | |||
6850 | return CheckBuiltinFunctionCall(FDecl, BuiltinID, TheCall); | |||
6851 | ||||
6852 | if (getLangOpts().CUDA) { | |||
6853 | if (Config) { | |||
6854 | // CUDA: Kernel calls must be to global functions | |||
6855 | if (FDecl && !FDecl->hasAttr<CUDAGlobalAttr>()) | |||
6856 | return ExprError(Diag(LParenLoc,diag::err_kern_call_not_global_function) | |||
6857 | << FDecl << Fn->getSourceRange()); | |||
6858 | ||||
6859 | // CUDA: Kernel function must have 'void' return type | |||
6860 | if (!FuncT->getReturnType()->isVoidType() && | |||
6861 | !FuncT->getReturnType()->getAs<AutoType>() && | |||
6862 | !FuncT->getReturnType()->isInstantiationDependentType()) | |||
6863 | return ExprError(Diag(LParenLoc, diag::err_kern_type_not_void_return) | |||
6864 | << Fn->getType() << Fn->getSourceRange()); | |||
6865 | } else { | |||
6866 | // CUDA: Calls to global functions must be configured | |||
6867 | if (FDecl && FDecl->hasAttr<CUDAGlobalAttr>()) | |||
6868 | return ExprError(Diag(LParenLoc, diag::err_global_call_not_config) | |||
6869 | << FDecl << Fn->getSourceRange()); | |||
6870 | } | |||
6871 | } | |||
6872 | ||||
6873 | // Check for a valid return type | |||
6874 | if (CheckCallReturnType(FuncT->getReturnType(), Fn->getBeginLoc(), TheCall, | |||
6875 | FDecl)) | |||
6876 | return ExprError(); | |||
6877 | ||||
6878 | // We know the result type of the call, set it. | |||
6879 | TheCall->setType(FuncT->getCallResultType(Context)); | |||
6880 | TheCall->setValueKind(Expr::getValueKindForType(FuncT->getReturnType())); | |||
6881 | ||||
6882 | if (Proto) { | |||
6883 | if (ConvertArgumentsForCall(TheCall, Fn, FDecl, Proto, Args, RParenLoc, | |||
6884 | IsExecConfig)) | |||
6885 | return ExprError(); | |||
6886 | } else { | |||
6887 | assert(isa<FunctionNoProtoType>(FuncT) && "Unknown FunctionType!")(static_cast <bool> (isa<FunctionNoProtoType>(FuncT ) && "Unknown FunctionType!") ? void (0) : __assert_fail ("isa<FunctionNoProtoType>(FuncT) && \"Unknown FunctionType!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6887, __extension__ __PRETTY_FUNCTION__)); | |||
6888 | ||||
6889 | if (FDecl) { | |||
6890 | // Check if we have too few/too many template arguments, based | |||
6891 | // on our knowledge of the function definition. | |||
6892 | const FunctionDecl *Def = nullptr; | |||
6893 | if (FDecl->hasBody(Def) && Args.size() != Def->param_size()) { | |||
6894 | Proto = Def->getType()->getAs<FunctionProtoType>(); | |||
6895 | if (!Proto || !(Proto->isVariadic() && Args.size() >= Def->param_size())) | |||
6896 | Diag(RParenLoc, diag::warn_call_wrong_number_of_arguments) | |||
6897 | << (Args.size() > Def->param_size()) << FDecl << Fn->getSourceRange(); | |||
6898 | } | |||
6899 | ||||
6900 | // If the function we're calling isn't a function prototype, but we have | |||
6901 | // a function prototype from a prior declaratiom, use that prototype. | |||
6902 | if (!FDecl->hasPrototype()) | |||
6903 | Proto = FDecl->getType()->getAs<FunctionProtoType>(); | |||
6904 | } | |||
6905 | ||||
6906 | // Promote the arguments (C99 6.5.2.2p6). | |||
6907 | for (unsigned i = 0, e = Args.size(); i != e; i++) { | |||
6908 | Expr *Arg = Args[i]; | |||
6909 | ||||
6910 | if (Proto && i < Proto->getNumParams()) { | |||
6911 | InitializedEntity Entity = InitializedEntity::InitializeParameter( | |||
6912 | Context, Proto->getParamType(i), Proto->isParamConsumed(i)); | |||
6913 | ExprResult ArgE = | |||
6914 | PerformCopyInitialization(Entity, SourceLocation(), Arg); | |||
6915 | if (ArgE.isInvalid()) | |||
6916 | return true; | |||
6917 | ||||
6918 | Arg = ArgE.getAs<Expr>(); | |||
6919 | ||||
6920 | } else { | |||
6921 | ExprResult ArgE = DefaultArgumentPromotion(Arg); | |||
6922 | ||||
6923 | if (ArgE.isInvalid()) | |||
6924 | return true; | |||
6925 | ||||
6926 | Arg = ArgE.getAs<Expr>(); | |||
6927 | } | |||
6928 | ||||
6929 | if (RequireCompleteType(Arg->getBeginLoc(), Arg->getType(), | |||
6930 | diag::err_call_incomplete_argument, Arg)) | |||
6931 | return ExprError(); | |||
6932 | ||||
6933 | TheCall->setArg(i, Arg); | |||
6934 | } | |||
6935 | TheCall->computeDependence(); | |||
6936 | } | |||
6937 | ||||
6938 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl)) | |||
6939 | if (!Method->isStatic()) | |||
6940 | return ExprError(Diag(LParenLoc, diag::err_member_call_without_object) | |||
6941 | << Fn->getSourceRange()); | |||
6942 | ||||
6943 | // Check for sentinels | |||
6944 | if (NDecl) | |||
6945 | DiagnoseSentinelCalls(NDecl, LParenLoc, Args); | |||
6946 | ||||
6947 | // Warn for unions passing across security boundary (CMSE). | |||
6948 | if (FuncT != nullptr && FuncT->getCmseNSCallAttr()) { | |||
6949 | for (unsigned i = 0, e = Args.size(); i != e; i++) { | |||
6950 | if (const auto *RT = | |||
6951 | dyn_cast<RecordType>(Args[i]->getType().getCanonicalType())) { | |||
6952 | if (RT->getDecl()->isOrContainsUnion()) | |||
6953 | Diag(Args[i]->getBeginLoc(), diag::warn_cmse_nonsecure_union) | |||
6954 | << 0 << i; | |||
6955 | } | |||
6956 | } | |||
6957 | } | |||
6958 | ||||
6959 | // Do special checking on direct calls to functions. | |||
6960 | if (FDecl) { | |||
6961 | if (CheckFunctionCall(FDecl, TheCall, Proto)) | |||
6962 | return ExprError(); | |||
6963 | ||||
6964 | checkFortifiedBuiltinMemoryFunction(FDecl, TheCall); | |||
6965 | ||||
6966 | if (BuiltinID) | |||
6967 | return CheckBuiltinFunctionCall(FDecl, BuiltinID, TheCall); | |||
6968 | } else if (NDecl) { | |||
6969 | if (CheckPointerCall(NDecl, TheCall, Proto)) | |||
6970 | return ExprError(); | |||
6971 | } else { | |||
6972 | if (CheckOtherCall(TheCall, Proto)) | |||
6973 | return ExprError(); | |||
6974 | } | |||
6975 | ||||
6976 | return CheckForImmediateInvocation(MaybeBindToTemporary(TheCall), FDecl); | |||
6977 | } | |||
6978 | ||||
6979 | ExprResult | |||
6980 | Sema::ActOnCompoundLiteral(SourceLocation LParenLoc, ParsedType Ty, | |||
6981 | SourceLocation RParenLoc, Expr *InitExpr) { | |||
6982 | assert(Ty && "ActOnCompoundLiteral(): missing type")(static_cast <bool> (Ty && "ActOnCompoundLiteral(): missing type" ) ? void (0) : __assert_fail ("Ty && \"ActOnCompoundLiteral(): missing type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6982, __extension__ __PRETTY_FUNCTION__)); | |||
6983 | assert(InitExpr && "ActOnCompoundLiteral(): missing expression")(static_cast <bool> (InitExpr && "ActOnCompoundLiteral(): missing expression" ) ? void (0) : __assert_fail ("InitExpr && \"ActOnCompoundLiteral(): missing expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 6983, __extension__ __PRETTY_FUNCTION__)); | |||
6984 | ||||
6985 | TypeSourceInfo *TInfo; | |||
6986 | QualType literalType = GetTypeFromParser(Ty, &TInfo); | |||
6987 | if (!TInfo) | |||
6988 | TInfo = Context.getTrivialTypeSourceInfo(literalType); | |||
6989 | ||||
6990 | return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, InitExpr); | |||
6991 | } | |||
6992 | ||||
6993 | ExprResult | |||
6994 | Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo, | |||
6995 | SourceLocation RParenLoc, Expr *LiteralExpr) { | |||
6996 | QualType literalType = TInfo->getType(); | |||
6997 | ||||
6998 | if (literalType->isArrayType()) { | |||
6999 | if (RequireCompleteSizedType( | |||
7000 | LParenLoc, Context.getBaseElementType(literalType), | |||
7001 | diag::err_array_incomplete_or_sizeless_type, | |||
7002 | SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()))) | |||
7003 | return ExprError(); | |||
7004 | if (literalType->isVariableArrayType()) { | |||
7005 | if (!tryToFixVariablyModifiedVarType(TInfo, literalType, LParenLoc, | |||
7006 | diag::err_variable_object_no_init)) { | |||
7007 | return ExprError(); | |||
7008 | } | |||
7009 | } | |||
7010 | } else if (!literalType->isDependentType() && | |||
7011 | RequireCompleteType(LParenLoc, literalType, | |||
7012 | diag::err_typecheck_decl_incomplete_type, | |||
7013 | SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()))) | |||
7014 | return ExprError(); | |||
7015 | ||||
7016 | InitializedEntity Entity | |||
7017 | = InitializedEntity::InitializeCompoundLiteralInit(TInfo); | |||
7018 | InitializationKind Kind | |||
7019 | = InitializationKind::CreateCStyleCast(LParenLoc, | |||
7020 | SourceRange(LParenLoc, RParenLoc), | |||
7021 | /*InitList=*/true); | |||
7022 | InitializationSequence InitSeq(*this, Entity, Kind, LiteralExpr); | |||
7023 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, LiteralExpr, | |||
7024 | &literalType); | |||
7025 | if (Result.isInvalid()) | |||
7026 | return ExprError(); | |||
7027 | LiteralExpr = Result.get(); | |||
7028 | ||||
7029 | bool isFileScope = !CurContext->isFunctionOrMethod(); | |||
7030 | ||||
7031 | // In C, compound literals are l-values for some reason. | |||
7032 | // For GCC compatibility, in C++, file-scope array compound literals with | |||
7033 | // constant initializers are also l-values, and compound literals are | |||
7034 | // otherwise prvalues. | |||
7035 | // | |||
7036 | // (GCC also treats C++ list-initialized file-scope array prvalues with | |||
7037 | // constant initializers as l-values, but that's non-conforming, so we don't | |||
7038 | // follow it there.) | |||
7039 | // | |||
7040 | // FIXME: It would be better to handle the lvalue cases as materializing and | |||
7041 | // lifetime-extending a temporary object, but our materialized temporaries | |||
7042 | // representation only supports lifetime extension from a variable, not "out | |||
7043 | // of thin air". | |||
7044 | // FIXME: For C++, we might want to instead lifetime-extend only if a pointer | |||
7045 | // is bound to the result of applying array-to-pointer decay to the compound | |||
7046 | // literal. | |||
7047 | // FIXME: GCC supports compound literals of reference type, which should | |||
7048 | // obviously have a value kind derived from the kind of reference involved. | |||
7049 | ExprValueKind VK = | |||
7050 | (getLangOpts().CPlusPlus && !(isFileScope && literalType->isArrayType())) | |||
7051 | ? VK_PRValue | |||
7052 | : VK_LValue; | |||
7053 | ||||
7054 | if (isFileScope) | |||
7055 | if (auto ILE = dyn_cast<InitListExpr>(LiteralExpr)) | |||
7056 | for (unsigned i = 0, j = ILE->getNumInits(); i != j; i++) { | |||
7057 | Expr *Init = ILE->getInit(i); | |||
7058 | ILE->setInit(i, ConstantExpr::Create(Context, Init)); | |||
7059 | } | |||
7060 | ||||
7061 | auto *E = new (Context) CompoundLiteralExpr(LParenLoc, TInfo, literalType, | |||
7062 | VK, LiteralExpr, isFileScope); | |||
7063 | if (isFileScope) { | |||
7064 | if (!LiteralExpr->isTypeDependent() && | |||
7065 | !LiteralExpr->isValueDependent() && | |||
7066 | !literalType->isDependentType()) // C99 6.5.2.5p3 | |||
7067 | if (CheckForConstantInitializer(LiteralExpr, literalType)) | |||
7068 | return ExprError(); | |||
7069 | } else if (literalType.getAddressSpace() != LangAS::opencl_private && | |||
7070 | literalType.getAddressSpace() != LangAS::Default) { | |||
7071 | // Embedded-C extensions to C99 6.5.2.5: | |||
7072 | // "If the compound literal occurs inside the body of a function, the | |||
7073 | // type name shall not be qualified by an address-space qualifier." | |||
7074 | Diag(LParenLoc, diag::err_compound_literal_with_address_space) | |||
7075 | << SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()); | |||
7076 | return ExprError(); | |||
7077 | } | |||
7078 | ||||
7079 | if (!isFileScope && !getLangOpts().CPlusPlus) { | |||
7080 | // Compound literals that have automatic storage duration are destroyed at | |||
7081 | // the end of the scope in C; in C++, they're just temporaries. | |||
7082 | ||||
7083 | // Emit diagnostics if it is or contains a C union type that is non-trivial | |||
7084 | // to destruct. | |||
7085 | if (E->getType().hasNonTrivialToPrimitiveDestructCUnion()) | |||
7086 | checkNonTrivialCUnion(E->getType(), E->getExprLoc(), | |||
7087 | NTCUC_CompoundLiteral, NTCUK_Destruct); | |||
7088 | ||||
7089 | // Diagnose jumps that enter or exit the lifetime of the compound literal. | |||
7090 | if (literalType.isDestructedType()) { | |||
7091 | Cleanup.setExprNeedsCleanups(true); | |||
7092 | ExprCleanupObjects.push_back(E); | |||
7093 | getCurFunction()->setHasBranchProtectedScope(); | |||
7094 | } | |||
7095 | } | |||
7096 | ||||
7097 | if (E->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | |||
7098 | E->getType().hasNonTrivialToPrimitiveCopyCUnion()) | |||
7099 | checkNonTrivialCUnionInInitializer(E->getInitializer(), | |||
7100 | E->getInitializer()->getExprLoc()); | |||
7101 | ||||
7102 | return MaybeBindToTemporary(E); | |||
7103 | } | |||
7104 | ||||
7105 | ExprResult | |||
7106 | Sema::ActOnInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList, | |||
7107 | SourceLocation RBraceLoc) { | |||
7108 | // Only produce each kind of designated initialization diagnostic once. | |||
7109 | SourceLocation FirstDesignator; | |||
7110 | bool DiagnosedArrayDesignator = false; | |||
7111 | bool DiagnosedNestedDesignator = false; | |||
7112 | bool DiagnosedMixedDesignator = false; | |||
7113 | ||||
7114 | // Check that any designated initializers are syntactically valid in the | |||
7115 | // current language mode. | |||
7116 | for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) { | |||
7117 | if (auto *DIE = dyn_cast<DesignatedInitExpr>(InitArgList[I])) { | |||
7118 | if (FirstDesignator.isInvalid()) | |||
7119 | FirstDesignator = DIE->getBeginLoc(); | |||
7120 | ||||
7121 | if (!getLangOpts().CPlusPlus) | |||
7122 | break; | |||
7123 | ||||
7124 | if (!DiagnosedNestedDesignator && DIE->size() > 1) { | |||
7125 | DiagnosedNestedDesignator = true; | |||
7126 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_nested) | |||
7127 | << DIE->getDesignatorsSourceRange(); | |||
7128 | } | |||
7129 | ||||
7130 | for (auto &Desig : DIE->designators()) { | |||
7131 | if (!Desig.isFieldDesignator() && !DiagnosedArrayDesignator) { | |||
7132 | DiagnosedArrayDesignator = true; | |||
7133 | Diag(Desig.getBeginLoc(), diag::ext_designated_init_array) | |||
7134 | << Desig.getSourceRange(); | |||
7135 | } | |||
7136 | } | |||
7137 | ||||
7138 | if (!DiagnosedMixedDesignator && | |||
7139 | !isa<DesignatedInitExpr>(InitArgList[0])) { | |||
7140 | DiagnosedMixedDesignator = true; | |||
7141 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_mixed) | |||
7142 | << DIE->getSourceRange(); | |||
7143 | Diag(InitArgList[0]->getBeginLoc(), diag::note_designated_init_mixed) | |||
7144 | << InitArgList[0]->getSourceRange(); | |||
7145 | } | |||
7146 | } else if (getLangOpts().CPlusPlus && !DiagnosedMixedDesignator && | |||
7147 | isa<DesignatedInitExpr>(InitArgList[0])) { | |||
7148 | DiagnosedMixedDesignator = true; | |||
7149 | auto *DIE = cast<DesignatedInitExpr>(InitArgList[0]); | |||
7150 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_mixed) | |||
7151 | << DIE->getSourceRange(); | |||
7152 | Diag(InitArgList[I]->getBeginLoc(), diag::note_designated_init_mixed) | |||
7153 | << InitArgList[I]->getSourceRange(); | |||
7154 | } | |||
7155 | } | |||
7156 | ||||
7157 | if (FirstDesignator.isValid()) { | |||
7158 | // Only diagnose designated initiaization as a C++20 extension if we didn't | |||
7159 | // already diagnose use of (non-C++20) C99 designator syntax. | |||
7160 | if (getLangOpts().CPlusPlus && !DiagnosedArrayDesignator && | |||
7161 | !DiagnosedNestedDesignator && !DiagnosedMixedDesignator) { | |||
7162 | Diag(FirstDesignator, getLangOpts().CPlusPlus20 | |||
7163 | ? diag::warn_cxx17_compat_designated_init | |||
7164 | : diag::ext_cxx_designated_init); | |||
7165 | } else if (!getLangOpts().CPlusPlus && !getLangOpts().C99) { | |||
7166 | Diag(FirstDesignator, diag::ext_designated_init); | |||
7167 | } | |||
7168 | } | |||
7169 | ||||
7170 | return BuildInitList(LBraceLoc, InitArgList, RBraceLoc); | |||
7171 | } | |||
7172 | ||||
7173 | ExprResult | |||
7174 | Sema::BuildInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList, | |||
7175 | SourceLocation RBraceLoc) { | |||
7176 | // Semantic analysis for initializers is done by ActOnDeclarator() and | |||
7177 | // CheckInitializer() - it requires knowledge of the object being initialized. | |||
7178 | ||||
7179 | // Immediately handle non-overload placeholders. Overloads can be | |||
7180 | // resolved contextually, but everything else here can't. | |||
7181 | for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) { | |||
7182 | if (InitArgList[I]->getType()->isNonOverloadPlaceholderType()) { | |||
7183 | ExprResult result = CheckPlaceholderExpr(InitArgList[I]); | |||
7184 | ||||
7185 | // Ignore failures; dropping the entire initializer list because | |||
7186 | // of one failure would be terrible for indexing/etc. | |||
7187 | if (result.isInvalid()) continue; | |||
7188 | ||||
7189 | InitArgList[I] = result.get(); | |||
7190 | } | |||
7191 | } | |||
7192 | ||||
7193 | InitListExpr *E = new (Context) InitListExpr(Context, LBraceLoc, InitArgList, | |||
7194 | RBraceLoc); | |||
7195 | E->setType(Context.VoidTy); // FIXME: just a place holder for now. | |||
7196 | return E; | |||
7197 | } | |||
7198 | ||||
7199 | /// Do an explicit extend of the given block pointer if we're in ARC. | |||
7200 | void Sema::maybeExtendBlockObject(ExprResult &E) { | |||
7201 | assert(E.get()->getType()->isBlockPointerType())(static_cast <bool> (E.get()->getType()->isBlockPointerType ()) ? void (0) : __assert_fail ("E.get()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7201, __extension__ __PRETTY_FUNCTION__)); | |||
7202 | assert(E.get()->isPRValue())(static_cast <bool> (E.get()->isPRValue()) ? void (0 ) : __assert_fail ("E.get()->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7202, __extension__ __PRETTY_FUNCTION__)); | |||
7203 | ||||
7204 | // Only do this in an r-value context. | |||
7205 | if (!getLangOpts().ObjCAutoRefCount) return; | |||
7206 | ||||
7207 | E = ImplicitCastExpr::Create( | |||
7208 | Context, E.get()->getType(), CK_ARCExtendBlockObject, E.get(), | |||
7209 | /*base path*/ nullptr, VK_PRValue, FPOptionsOverride()); | |||
7210 | Cleanup.setExprNeedsCleanups(true); | |||
7211 | } | |||
7212 | ||||
7213 | /// Prepare a conversion of the given expression to an ObjC object | |||
7214 | /// pointer type. | |||
7215 | CastKind Sema::PrepareCastToObjCObjectPointer(ExprResult &E) { | |||
7216 | QualType type = E.get()->getType(); | |||
7217 | if (type->isObjCObjectPointerType()) { | |||
7218 | return CK_BitCast; | |||
7219 | } else if (type->isBlockPointerType()) { | |||
7220 | maybeExtendBlockObject(E); | |||
7221 | return CK_BlockPointerToObjCPointerCast; | |||
7222 | } else { | |||
7223 | assert(type->isPointerType())(static_cast <bool> (type->isPointerType()) ? void ( 0) : __assert_fail ("type->isPointerType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7223, __extension__ __PRETTY_FUNCTION__)); | |||
7224 | return CK_CPointerToObjCPointerCast; | |||
7225 | } | |||
7226 | } | |||
7227 | ||||
7228 | /// Prepares for a scalar cast, performing all the necessary stages | |||
7229 | /// except the final cast and returning the kind required. | |||
7230 | CastKind Sema::PrepareScalarCast(ExprResult &Src, QualType DestTy) { | |||
7231 | // Both Src and Dest are scalar types, i.e. arithmetic or pointer. | |||
7232 | // Also, callers should have filtered out the invalid cases with | |||
7233 | // pointers. Everything else should be possible. | |||
7234 | ||||
7235 | QualType SrcTy = Src.get()->getType(); | |||
7236 | if (Context.hasSameUnqualifiedType(SrcTy, DestTy)) | |||
7237 | return CK_NoOp; | |||
7238 | ||||
7239 | switch (Type::ScalarTypeKind SrcKind = SrcTy->getScalarTypeKind()) { | |||
7240 | case Type::STK_MemberPointer: | |||
7241 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7241); | |||
7242 | ||||
7243 | case Type::STK_CPointer: | |||
7244 | case Type::STK_BlockPointer: | |||
7245 | case Type::STK_ObjCObjectPointer: | |||
7246 | switch (DestTy->getScalarTypeKind()) { | |||
7247 | case Type::STK_CPointer: { | |||
7248 | LangAS SrcAS = SrcTy->getPointeeType().getAddressSpace(); | |||
7249 | LangAS DestAS = DestTy->getPointeeType().getAddressSpace(); | |||
7250 | if (SrcAS != DestAS) | |||
7251 | return CK_AddressSpaceConversion; | |||
7252 | if (Context.hasCvrSimilarType(SrcTy, DestTy)) | |||
7253 | return CK_NoOp; | |||
7254 | return CK_BitCast; | |||
7255 | } | |||
7256 | case Type::STK_BlockPointer: | |||
7257 | return (SrcKind == Type::STK_BlockPointer | |||
7258 | ? CK_BitCast : CK_AnyPointerToBlockPointerCast); | |||
7259 | case Type::STK_ObjCObjectPointer: | |||
7260 | if (SrcKind == Type::STK_ObjCObjectPointer) | |||
7261 | return CK_BitCast; | |||
7262 | if (SrcKind == Type::STK_CPointer) | |||
7263 | return CK_CPointerToObjCPointerCast; | |||
7264 | maybeExtendBlockObject(Src); | |||
7265 | return CK_BlockPointerToObjCPointerCast; | |||
7266 | case Type::STK_Bool: | |||
7267 | return CK_PointerToBoolean; | |||
7268 | case Type::STK_Integral: | |||
7269 | return CK_PointerToIntegral; | |||
7270 | case Type::STK_Floating: | |||
7271 | case Type::STK_FloatingComplex: | |||
7272 | case Type::STK_IntegralComplex: | |||
7273 | case Type::STK_MemberPointer: | |||
7274 | case Type::STK_FixedPoint: | |||
7275 | llvm_unreachable("illegal cast from pointer")::llvm::llvm_unreachable_internal("illegal cast from pointer" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7275); | |||
7276 | } | |||
7277 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7277); | |||
7278 | ||||
7279 | case Type::STK_FixedPoint: | |||
7280 | switch (DestTy->getScalarTypeKind()) { | |||
7281 | case Type::STK_FixedPoint: | |||
7282 | return CK_FixedPointCast; | |||
7283 | case Type::STK_Bool: | |||
7284 | return CK_FixedPointToBoolean; | |||
7285 | case Type::STK_Integral: | |||
7286 | return CK_FixedPointToIntegral; | |||
7287 | case Type::STK_Floating: | |||
7288 | return CK_FixedPointToFloating; | |||
7289 | case Type::STK_IntegralComplex: | |||
7290 | case Type::STK_FloatingComplex: | |||
7291 | Diag(Src.get()->getExprLoc(), | |||
7292 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7293 | << DestTy; | |||
7294 | return CK_IntegralCast; | |||
7295 | case Type::STK_CPointer: | |||
7296 | case Type::STK_ObjCObjectPointer: | |||
7297 | case Type::STK_BlockPointer: | |||
7298 | case Type::STK_MemberPointer: | |||
7299 | llvm_unreachable("illegal cast to pointer type")::llvm::llvm_unreachable_internal("illegal cast to pointer type" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7299); | |||
7300 | } | |||
7301 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7301); | |||
7302 | ||||
7303 | case Type::STK_Bool: // casting from bool is like casting from an integer | |||
7304 | case Type::STK_Integral: | |||
7305 | switch (DestTy->getScalarTypeKind()) { | |||
7306 | case Type::STK_CPointer: | |||
7307 | case Type::STK_ObjCObjectPointer: | |||
7308 | case Type::STK_BlockPointer: | |||
7309 | if (Src.get()->isNullPointerConstant(Context, | |||
7310 | Expr::NPC_ValueDependentIsNull)) | |||
7311 | return CK_NullToPointer; | |||
7312 | return CK_IntegralToPointer; | |||
7313 | case Type::STK_Bool: | |||
7314 | return CK_IntegralToBoolean; | |||
7315 | case Type::STK_Integral: | |||
7316 | return CK_IntegralCast; | |||
7317 | case Type::STK_Floating: | |||
7318 | return CK_IntegralToFloating; | |||
7319 | case Type::STK_IntegralComplex: | |||
7320 | Src = ImpCastExprToType(Src.get(), | |||
7321 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7322 | CK_IntegralCast); | |||
7323 | return CK_IntegralRealToComplex; | |||
7324 | case Type::STK_FloatingComplex: | |||
7325 | Src = ImpCastExprToType(Src.get(), | |||
7326 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7327 | CK_IntegralToFloating); | |||
7328 | return CK_FloatingRealToComplex; | |||
7329 | case Type::STK_MemberPointer: | |||
7330 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7330); | |||
7331 | case Type::STK_FixedPoint: | |||
7332 | return CK_IntegralToFixedPoint; | |||
7333 | } | |||
7334 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7334); | |||
7335 | ||||
7336 | case Type::STK_Floating: | |||
7337 | switch (DestTy->getScalarTypeKind()) { | |||
7338 | case Type::STK_Floating: | |||
7339 | return CK_FloatingCast; | |||
7340 | case Type::STK_Bool: | |||
7341 | return CK_FloatingToBoolean; | |||
7342 | case Type::STK_Integral: | |||
7343 | return CK_FloatingToIntegral; | |||
7344 | case Type::STK_FloatingComplex: | |||
7345 | Src = ImpCastExprToType(Src.get(), | |||
7346 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7347 | CK_FloatingCast); | |||
7348 | return CK_FloatingRealToComplex; | |||
7349 | case Type::STK_IntegralComplex: | |||
7350 | Src = ImpCastExprToType(Src.get(), | |||
7351 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7352 | CK_FloatingToIntegral); | |||
7353 | return CK_IntegralRealToComplex; | |||
7354 | case Type::STK_CPointer: | |||
7355 | case Type::STK_ObjCObjectPointer: | |||
7356 | case Type::STK_BlockPointer: | |||
7357 | llvm_unreachable("valid float->pointer cast?")::llvm::llvm_unreachable_internal("valid float->pointer cast?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7357); | |||
7358 | case Type::STK_MemberPointer: | |||
7359 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7359); | |||
7360 | case Type::STK_FixedPoint: | |||
7361 | return CK_FloatingToFixedPoint; | |||
7362 | } | |||
7363 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7363); | |||
7364 | ||||
7365 | case Type::STK_FloatingComplex: | |||
7366 | switch (DestTy->getScalarTypeKind()) { | |||
7367 | case Type::STK_FloatingComplex: | |||
7368 | return CK_FloatingComplexCast; | |||
7369 | case Type::STK_IntegralComplex: | |||
7370 | return CK_FloatingComplexToIntegralComplex; | |||
7371 | case Type::STK_Floating: { | |||
7372 | QualType ET = SrcTy->castAs<ComplexType>()->getElementType(); | |||
7373 | if (Context.hasSameType(ET, DestTy)) | |||
7374 | return CK_FloatingComplexToReal; | |||
7375 | Src = ImpCastExprToType(Src.get(), ET, CK_FloatingComplexToReal); | |||
7376 | return CK_FloatingCast; | |||
7377 | } | |||
7378 | case Type::STK_Bool: | |||
7379 | return CK_FloatingComplexToBoolean; | |||
7380 | case Type::STK_Integral: | |||
7381 | Src = ImpCastExprToType(Src.get(), | |||
7382 | SrcTy->castAs<ComplexType>()->getElementType(), | |||
7383 | CK_FloatingComplexToReal); | |||
7384 | return CK_FloatingToIntegral; | |||
7385 | case Type::STK_CPointer: | |||
7386 | case Type::STK_ObjCObjectPointer: | |||
7387 | case Type::STK_BlockPointer: | |||
7388 | llvm_unreachable("valid complex float->pointer cast?")::llvm::llvm_unreachable_internal("valid complex float->pointer cast?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7388); | |||
7389 | case Type::STK_MemberPointer: | |||
7390 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7390); | |||
7391 | case Type::STK_FixedPoint: | |||
7392 | Diag(Src.get()->getExprLoc(), | |||
7393 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7394 | << SrcTy; | |||
7395 | return CK_IntegralCast; | |||
7396 | } | |||
7397 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7397); | |||
7398 | ||||
7399 | case Type::STK_IntegralComplex: | |||
7400 | switch (DestTy->getScalarTypeKind()) { | |||
7401 | case Type::STK_FloatingComplex: | |||
7402 | return CK_IntegralComplexToFloatingComplex; | |||
7403 | case Type::STK_IntegralComplex: | |||
7404 | return CK_IntegralComplexCast; | |||
7405 | case Type::STK_Integral: { | |||
7406 | QualType ET = SrcTy->castAs<ComplexType>()->getElementType(); | |||
7407 | if (Context.hasSameType(ET, DestTy)) | |||
7408 | return CK_IntegralComplexToReal; | |||
7409 | Src = ImpCastExprToType(Src.get(), ET, CK_IntegralComplexToReal); | |||
7410 | return CK_IntegralCast; | |||
7411 | } | |||
7412 | case Type::STK_Bool: | |||
7413 | return CK_IntegralComplexToBoolean; | |||
7414 | case Type::STK_Floating: | |||
7415 | Src = ImpCastExprToType(Src.get(), | |||
7416 | SrcTy->castAs<ComplexType>()->getElementType(), | |||
7417 | CK_IntegralComplexToReal); | |||
7418 | return CK_IntegralToFloating; | |||
7419 | case Type::STK_CPointer: | |||
7420 | case Type::STK_ObjCObjectPointer: | |||
7421 | case Type::STK_BlockPointer: | |||
7422 | llvm_unreachable("valid complex int->pointer cast?")::llvm::llvm_unreachable_internal("valid complex int->pointer cast?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7422); | |||
7423 | case Type::STK_MemberPointer: | |||
7424 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7424); | |||
7425 | case Type::STK_FixedPoint: | |||
7426 | Diag(Src.get()->getExprLoc(), | |||
7427 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7428 | << SrcTy; | |||
7429 | return CK_IntegralCast; | |||
7430 | } | |||
7431 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7431); | |||
7432 | } | |||
7433 | ||||
7434 | llvm_unreachable("Unhandled scalar cast")::llvm::llvm_unreachable_internal("Unhandled scalar cast", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7434); | |||
7435 | } | |||
7436 | ||||
7437 | static bool breakDownVectorType(QualType type, uint64_t &len, | |||
7438 | QualType &eltType) { | |||
7439 | // Vectors are simple. | |||
7440 | if (const VectorType *vecType = type->getAs<VectorType>()) { | |||
7441 | len = vecType->getNumElements(); | |||
7442 | eltType = vecType->getElementType(); | |||
7443 | assert(eltType->isScalarType())(static_cast <bool> (eltType->isScalarType()) ? void (0) : __assert_fail ("eltType->isScalarType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7443, __extension__ __PRETTY_FUNCTION__)); | |||
7444 | return true; | |||
7445 | } | |||
7446 | ||||
7447 | // We allow lax conversion to and from non-vector types, but only if | |||
7448 | // they're real types (i.e. non-complex, non-pointer scalar types). | |||
7449 | if (!type->isRealType()) return false; | |||
7450 | ||||
7451 | len = 1; | |||
7452 | eltType = type; | |||
7453 | return true; | |||
7454 | } | |||
7455 | ||||
7456 | /// Are the two types SVE-bitcast-compatible types? I.e. is bitcasting from the | |||
7457 | /// first SVE type (e.g. an SVE VLAT) to the second type (e.g. an SVE VLST) | |||
7458 | /// allowed? | |||
7459 | /// | |||
7460 | /// This will also return false if the two given types do not make sense from | |||
7461 | /// the perspective of SVE bitcasts. | |||
7462 | bool Sema::isValidSveBitcast(QualType srcTy, QualType destTy) { | |||
7463 | assert(srcTy->isVectorType() || destTy->isVectorType())(static_cast <bool> (srcTy->isVectorType() || destTy ->isVectorType()) ? void (0) : __assert_fail ("srcTy->isVectorType() || destTy->isVectorType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7463, __extension__ __PRETTY_FUNCTION__)); | |||
7464 | ||||
7465 | auto ValidScalableConversion = [](QualType FirstType, QualType SecondType) { | |||
7466 | if (!FirstType->isSizelessBuiltinType()) | |||
7467 | return false; | |||
7468 | ||||
7469 | const auto *VecTy = SecondType->getAs<VectorType>(); | |||
7470 | return VecTy && | |||
7471 | VecTy->getVectorKind() == VectorType::SveFixedLengthDataVector; | |||
7472 | }; | |||
7473 | ||||
7474 | return ValidScalableConversion(srcTy, destTy) || | |||
7475 | ValidScalableConversion(destTy, srcTy); | |||
7476 | } | |||
7477 | ||||
7478 | /// Are the two types matrix types and do they have the same dimensions i.e. | |||
7479 | /// do they have the same number of rows and the same number of columns? | |||
7480 | bool Sema::areMatrixTypesOfTheSameDimension(QualType srcTy, QualType destTy) { | |||
7481 | if (!destTy->isMatrixType() || !srcTy->isMatrixType()) | |||
7482 | return false; | |||
7483 | ||||
7484 | const ConstantMatrixType *matSrcType = srcTy->getAs<ConstantMatrixType>(); | |||
7485 | const ConstantMatrixType *matDestType = destTy->getAs<ConstantMatrixType>(); | |||
7486 | ||||
7487 | return matSrcType->getNumRows() == matDestType->getNumRows() && | |||
| ||||
7488 | matSrcType->getNumColumns() == matDestType->getNumColumns(); | |||
7489 | } | |||
7490 | ||||
7491 | bool Sema::areVectorTypesSameSize(QualType SrcTy, QualType DestTy) { | |||
7492 | assert(DestTy->isVectorType() || SrcTy->isVectorType())(static_cast <bool> (DestTy->isVectorType() || SrcTy ->isVectorType()) ? void (0) : __assert_fail ("DestTy->isVectorType() || SrcTy->isVectorType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7492, __extension__ __PRETTY_FUNCTION__)); | |||
7493 | ||||
7494 | uint64_t SrcLen, DestLen; | |||
7495 | QualType SrcEltTy, DestEltTy; | |||
7496 | if (!breakDownVectorType(SrcTy, SrcLen, SrcEltTy)) | |||
7497 | return false; | |||
7498 | if (!breakDownVectorType(DestTy, DestLen, DestEltTy)) | |||
7499 | return false; | |||
7500 | ||||
7501 | // ASTContext::getTypeSize will return the size rounded up to a | |||
7502 | // power of 2, so instead of using that, we need to use the raw | |||
7503 | // element size multiplied by the element count. | |||
7504 | uint64_t SrcEltSize = Context.getTypeSize(SrcEltTy); | |||
7505 | uint64_t DestEltSize = Context.getTypeSize(DestEltTy); | |||
7506 | ||||
7507 | return (SrcLen * SrcEltSize == DestLen * DestEltSize); | |||
7508 | } | |||
7509 | ||||
7510 | /// Are the two types lax-compatible vector types? That is, given | |||
7511 | /// that one of them is a vector, do they have equal storage sizes, | |||
7512 | /// where the storage size is the number of elements times the element | |||
7513 | /// size? | |||
7514 | /// | |||
7515 | /// This will also return false if either of the types is neither a | |||
7516 | /// vector nor a real type. | |||
7517 | bool Sema::areLaxCompatibleVectorTypes(QualType srcTy, QualType destTy) { | |||
7518 | assert(destTy->isVectorType() || srcTy->isVectorType())(static_cast <bool> (destTy->isVectorType() || srcTy ->isVectorType()) ? void (0) : __assert_fail ("destTy->isVectorType() || srcTy->isVectorType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7518, __extension__ __PRETTY_FUNCTION__)); | |||
7519 | ||||
7520 | // Disallow lax conversions between scalars and ExtVectors (these | |||
7521 | // conversions are allowed for other vector types because common headers | |||
7522 | // depend on them). Most scalar OP ExtVector cases are handled by the | |||
7523 | // splat path anyway, which does what we want (convert, not bitcast). | |||
7524 | // What this rules out for ExtVectors is crazy things like char4*float. | |||
7525 | if (srcTy->isScalarType() && destTy->isExtVectorType()) return false; | |||
7526 | if (destTy->isScalarType() && srcTy->isExtVectorType()) return false; | |||
7527 | ||||
7528 | return areVectorTypesSameSize(srcTy, destTy); | |||
7529 | } | |||
7530 | ||||
7531 | /// Is this a legal conversion between two types, one of which is | |||
7532 | /// known to be a vector type? | |||
7533 | bool Sema::isLaxVectorConversion(QualType srcTy, QualType destTy) { | |||
7534 | assert(destTy->isVectorType() || srcTy->isVectorType())(static_cast <bool> (destTy->isVectorType() || srcTy ->isVectorType()) ? void (0) : __assert_fail ("destTy->isVectorType() || srcTy->isVectorType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7534, __extension__ __PRETTY_FUNCTION__)); | |||
7535 | ||||
7536 | switch (Context.getLangOpts().getLaxVectorConversions()) { | |||
7537 | case LangOptions::LaxVectorConversionKind::None: | |||
7538 | return false; | |||
7539 | ||||
7540 | case LangOptions::LaxVectorConversionKind::Integer: | |||
7541 | if (!srcTy->isIntegralOrEnumerationType()) { | |||
7542 | auto *Vec = srcTy->getAs<VectorType>(); | |||
7543 | if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType()) | |||
7544 | return false; | |||
7545 | } | |||
7546 | if (!destTy->isIntegralOrEnumerationType()) { | |||
7547 | auto *Vec = destTy->getAs<VectorType>(); | |||
7548 | if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType()) | |||
7549 | return false; | |||
7550 | } | |||
7551 | // OK, integer (vector) -> integer (vector) bitcast. | |||
7552 | break; | |||
7553 | ||||
7554 | case LangOptions::LaxVectorConversionKind::All: | |||
7555 | break; | |||
7556 | } | |||
7557 | ||||
7558 | return areLaxCompatibleVectorTypes(srcTy, destTy); | |||
7559 | } | |||
7560 | ||||
7561 | bool Sema::CheckMatrixCast(SourceRange R, QualType DestTy, QualType SrcTy, | |||
7562 | CastKind &Kind) { | |||
7563 | if (SrcTy->isMatrixType() && DestTy->isMatrixType()) { | |||
| ||||
7564 | if (!areMatrixTypesOfTheSameDimension(SrcTy, DestTy)) { | |||
7565 | return Diag(R.getBegin(), diag::err_invalid_conversion_between_matrixes) | |||
7566 | << DestTy << SrcTy << R; | |||
7567 | } | |||
7568 | } else if (SrcTy->isMatrixType()) { | |||
7569 | return Diag(R.getBegin(), | |||
7570 | diag::err_invalid_conversion_between_matrix_and_type) | |||
7571 | << SrcTy << DestTy << R; | |||
7572 | } else if (DestTy->isMatrixType()) { | |||
7573 | return Diag(R.getBegin(), | |||
7574 | diag::err_invalid_conversion_between_matrix_and_type) | |||
7575 | << DestTy << SrcTy << R; | |||
7576 | } | |||
7577 | ||||
7578 | Kind = CK_MatrixCast; | |||
7579 | return false; | |||
7580 | } | |||
7581 | ||||
7582 | bool Sema::CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, | |||
7583 | CastKind &Kind) { | |||
7584 | assert(VectorTy->isVectorType() && "Not a vector type!")(static_cast <bool> (VectorTy->isVectorType() && "Not a vector type!") ? void (0) : __assert_fail ("VectorTy->isVectorType() && \"Not a vector type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7584, __extension__ __PRETTY_FUNCTION__)); | |||
7585 | ||||
7586 | if (Ty->isVectorType() || Ty->isIntegralType(Context)) { | |||
7587 | if (!areLaxCompatibleVectorTypes(Ty, VectorTy)) | |||
7588 | return Diag(R.getBegin(), | |||
7589 | Ty->isVectorType() ? | |||
7590 | diag::err_invalid_conversion_between_vectors : | |||
7591 | diag::err_invalid_conversion_between_vector_and_integer) | |||
7592 | << VectorTy << Ty << R; | |||
7593 | } else | |||
7594 | return Diag(R.getBegin(), | |||
7595 | diag::err_invalid_conversion_between_vector_and_scalar) | |||
7596 | << VectorTy << Ty << R; | |||
7597 | ||||
7598 | Kind = CK_BitCast; | |||
7599 | return false; | |||
7600 | } | |||
7601 | ||||
7602 | ExprResult Sema::prepareVectorSplat(QualType VectorTy, Expr *SplattedExpr) { | |||
7603 | QualType DestElemTy = VectorTy->castAs<VectorType>()->getElementType(); | |||
7604 | ||||
7605 | if (DestElemTy == SplattedExpr->getType()) | |||
7606 | return SplattedExpr; | |||
7607 | ||||
7608 | assert(DestElemTy->isFloatingType() ||(static_cast <bool> (DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()) ? void (0) : __assert_fail ("DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7609, __extension__ __PRETTY_FUNCTION__)) | |||
7609 | DestElemTy->isIntegralOrEnumerationType())(static_cast <bool> (DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()) ? void (0) : __assert_fail ("DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7609, __extension__ __PRETTY_FUNCTION__)); | |||
7610 | ||||
7611 | CastKind CK; | |||
7612 | if (VectorTy->isExtVectorType() && SplattedExpr->getType()->isBooleanType()) { | |||
7613 | // OpenCL requires that we convert `true` boolean expressions to -1, but | |||
7614 | // only when splatting vectors. | |||
7615 | if (DestElemTy->isFloatingType()) { | |||
7616 | // To avoid having to have a CK_BooleanToSignedFloating cast kind, we cast | |||
7617 | // in two steps: boolean to signed integral, then to floating. | |||
7618 | ExprResult CastExprRes = ImpCastExprToType(SplattedExpr, Context.IntTy, | |||
7619 | CK_BooleanToSignedIntegral); | |||
7620 | SplattedExpr = CastExprRes.get(); | |||
7621 | CK = CK_IntegralToFloating; | |||
7622 | } else { | |||
7623 | CK = CK_BooleanToSignedIntegral; | |||
7624 | } | |||
7625 | } else { | |||
7626 | ExprResult CastExprRes = SplattedExpr; | |||
7627 | CK = PrepareScalarCast(CastExprRes, DestElemTy); | |||
7628 | if (CastExprRes.isInvalid()) | |||
7629 | return ExprError(); | |||
7630 | SplattedExpr = CastExprRes.get(); | |||
7631 | } | |||
7632 | return ImpCastExprToType(SplattedExpr, DestElemTy, CK); | |||
7633 | } | |||
7634 | ||||
7635 | ExprResult Sema::CheckExtVectorCast(SourceRange R, QualType DestTy, | |||
7636 | Expr *CastExpr, CastKind &Kind) { | |||
7637 | assert(DestTy->isExtVectorType() && "Not an extended vector type!")(static_cast <bool> (DestTy->isExtVectorType() && "Not an extended vector type!") ? void (0) : __assert_fail ( "DestTy->isExtVectorType() && \"Not an extended vector type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7637, __extension__ __PRETTY_FUNCTION__)); | |||
7638 | ||||
7639 | QualType SrcTy = CastExpr->getType(); | |||
7640 | ||||
7641 | // If SrcTy is a VectorType, the total size must match to explicitly cast to | |||
7642 | // an ExtVectorType. | |||
7643 | // In OpenCL, casts between vectors of different types are not allowed. | |||
7644 | // (See OpenCL 6.2). | |||
7645 | if (SrcTy->isVectorType()) { | |||
7646 | if (!areLaxCompatibleVectorTypes(SrcTy, DestTy) || | |||
7647 | (getLangOpts().OpenCL && | |||
7648 | !Context.hasSameUnqualifiedType(DestTy, SrcTy))) { | |||
7649 | Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors) | |||
7650 | << DestTy << SrcTy << R; | |||
7651 | return ExprError(); | |||
7652 | } | |||
7653 | Kind = CK_BitCast; | |||
7654 | return CastExpr; | |||
7655 | } | |||
7656 | ||||
7657 | // All non-pointer scalars can be cast to ExtVector type. The appropriate | |||
7658 | // conversion will take place first from scalar to elt type, and then | |||
7659 | // splat from elt type to vector. | |||
7660 | if (SrcTy->isPointerType()) | |||
7661 | return Diag(R.getBegin(), | |||
7662 | diag::err_invalid_conversion_between_vector_and_scalar) | |||
7663 | << DestTy << SrcTy << R; | |||
7664 | ||||
7665 | Kind = CK_VectorSplat; | |||
7666 | return prepareVectorSplat(DestTy, CastExpr); | |||
7667 | } | |||
7668 | ||||
7669 | ExprResult | |||
7670 | Sema::ActOnCastExpr(Scope *S, SourceLocation LParenLoc, | |||
7671 | Declarator &D, ParsedType &Ty, | |||
7672 | SourceLocation RParenLoc, Expr *CastExpr) { | |||
7673 | assert(!D.isInvalidType() && (CastExpr != nullptr) &&(static_cast <bool> (!D.isInvalidType() && (CastExpr != nullptr) && "ActOnCastExpr(): missing type or expr" ) ? void (0) : __assert_fail ("!D.isInvalidType() && (CastExpr != nullptr) && \"ActOnCastExpr(): missing type or expr\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7674, __extension__ __PRETTY_FUNCTION__)) | |||
7674 | "ActOnCastExpr(): missing type or expr")(static_cast <bool> (!D.isInvalidType() && (CastExpr != nullptr) && "ActOnCastExpr(): missing type or expr" ) ? void (0) : __assert_fail ("!D.isInvalidType() && (CastExpr != nullptr) && \"ActOnCastExpr(): missing type or expr\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7674, __extension__ __PRETTY_FUNCTION__)); | |||
7675 | ||||
7676 | TypeSourceInfo *castTInfo = GetTypeForDeclaratorCast(D, CastExpr->getType()); | |||
7677 | if (D.isInvalidType()) | |||
7678 | return ExprError(); | |||
7679 | ||||
7680 | if (getLangOpts().CPlusPlus) { | |||
7681 | // Check that there are no default arguments (C++ only). | |||
7682 | CheckExtraCXXDefaultArguments(D); | |||
7683 | } else { | |||
7684 | // Make sure any TypoExprs have been dealt with. | |||
7685 | ExprResult Res = CorrectDelayedTyposInExpr(CastExpr); | |||
7686 | if (!Res.isUsable()) | |||
7687 | return ExprError(); | |||
7688 | CastExpr = Res.get(); | |||
7689 | } | |||
7690 | ||||
7691 | checkUnusedDeclAttributes(D); | |||
7692 | ||||
7693 | QualType castType = castTInfo->getType(); | |||
7694 | Ty = CreateParsedType(castType, castTInfo); | |||
7695 | ||||
7696 | bool isVectorLiteral = false; | |||
7697 | ||||
7698 | // Check for an altivec or OpenCL literal, | |||
7699 | // i.e. all the elements are integer constants. | |||
7700 | ParenExpr *PE = dyn_cast<ParenExpr>(CastExpr); | |||
7701 | ParenListExpr *PLE = dyn_cast<ParenListExpr>(CastExpr); | |||
7702 | if ((getLangOpts().AltiVec || getLangOpts().ZVector || getLangOpts().OpenCL) | |||
7703 | && castType->isVectorType() && (PE || PLE)) { | |||
7704 | if (PLE && PLE->getNumExprs() == 0) { | |||
7705 | Diag(PLE->getExprLoc(), diag::err_altivec_empty_initializer); | |||
7706 | return ExprError(); | |||
7707 | } | |||
7708 | if (PE || PLE->getNumExprs() == 1) { | |||
7709 | Expr *E = (PE ? PE->getSubExpr() : PLE->getExpr(0)); | |||
7710 | if (!E->isTypeDependent() && !E->getType()->isVectorType()) | |||
7711 | isVectorLiteral = true; | |||
7712 | } | |||
7713 | else | |||
7714 | isVectorLiteral = true; | |||
7715 | } | |||
7716 | ||||
7717 | // If this is a vector initializer, '(' type ')' '(' init, ..., init ')' | |||
7718 | // then handle it as such. | |||
7719 | if (isVectorLiteral) | |||
7720 | return BuildVectorLiteral(LParenLoc, RParenLoc, CastExpr, castTInfo); | |||
7721 | ||||
7722 | // If the Expr being casted is a ParenListExpr, handle it specially. | |||
7723 | // This is not an AltiVec-style cast, so turn the ParenListExpr into a | |||
7724 | // sequence of BinOp comma operators. | |||
7725 | if (isa<ParenListExpr>(CastExpr)) { | |||
7726 | ExprResult Result = MaybeConvertParenListExprToParenExpr(S, CastExpr); | |||
7727 | if (Result.isInvalid()) return ExprError(); | |||
7728 | CastExpr = Result.get(); | |||
7729 | } | |||
7730 | ||||
7731 | if (getLangOpts().CPlusPlus && !castType->isVoidType() && | |||
7732 | !getSourceManager().isInSystemMacro(LParenLoc)) | |||
7733 | Diag(LParenLoc, diag::warn_old_style_cast) << CastExpr->getSourceRange(); | |||
7734 | ||||
7735 | CheckTollFreeBridgeCast(castType, CastExpr); | |||
7736 | ||||
7737 | CheckObjCBridgeRelatedCast(castType, CastExpr); | |||
7738 | ||||
7739 | DiscardMisalignedMemberAddress(castType.getTypePtr(), CastExpr); | |||
7740 | ||||
7741 | return BuildCStyleCastExpr(LParenLoc, castTInfo, RParenLoc, CastExpr); | |||
7742 | } | |||
7743 | ||||
7744 | ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc, | |||
7745 | SourceLocation RParenLoc, Expr *E, | |||
7746 | TypeSourceInfo *TInfo) { | |||
7747 | assert((isa<ParenListExpr>(E) || isa<ParenExpr>(E)) &&(static_cast <bool> ((isa<ParenListExpr>(E) || isa <ParenExpr>(E)) && "Expected paren or paren list expression" ) ? void (0) : __assert_fail ("(isa<ParenListExpr>(E) || isa<ParenExpr>(E)) && \"Expected paren or paren list expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7748, __extension__ __PRETTY_FUNCTION__)) | |||
7748 | "Expected paren or paren list expression")(static_cast <bool> ((isa<ParenListExpr>(E) || isa <ParenExpr>(E)) && "Expected paren or paren list expression" ) ? void (0) : __assert_fail ("(isa<ParenListExpr>(E) || isa<ParenExpr>(E)) && \"Expected paren or paren list expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7748, __extension__ __PRETTY_FUNCTION__)); | |||
7749 | ||||
7750 | Expr **exprs; | |||
7751 | unsigned numExprs; | |||
7752 | Expr *subExpr; | |||
7753 | SourceLocation LiteralLParenLoc, LiteralRParenLoc; | |||
7754 | if (ParenListExpr *PE = dyn_cast<ParenListExpr>(E)) { | |||
7755 | LiteralLParenLoc = PE->getLParenLoc(); | |||
7756 | LiteralRParenLoc = PE->getRParenLoc(); | |||
7757 | exprs = PE->getExprs(); | |||
7758 | numExprs = PE->getNumExprs(); | |||
7759 | } else { // isa<ParenExpr> by assertion at function entrance | |||
7760 | LiteralLParenLoc = cast<ParenExpr>(E)->getLParen(); | |||
7761 | LiteralRParenLoc = cast<ParenExpr>(E)->getRParen(); | |||
7762 | subExpr = cast<ParenExpr>(E)->getSubExpr(); | |||
7763 | exprs = &subExpr; | |||
7764 | numExprs = 1; | |||
7765 | } | |||
7766 | ||||
7767 | QualType Ty = TInfo->getType(); | |||
7768 | assert(Ty->isVectorType() && "Expected vector type")(static_cast <bool> (Ty->isVectorType() && "Expected vector type" ) ? void (0) : __assert_fail ("Ty->isVectorType() && \"Expected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 7768, __extension__ __PRETTY_FUNCTION__)); | |||
7769 | ||||
7770 | SmallVector<Expr *, 8> initExprs; | |||
7771 | const VectorType *VTy = Ty->castAs<VectorType>(); | |||
7772 | unsigned numElems = VTy->getNumElements(); | |||
7773 | ||||
7774 | // '(...)' form of vector initialization in AltiVec: the number of | |||
7775 | // initializers must be one or must match the size of the vector. | |||
7776 | // If a single value is specified in the initializer then it will be | |||
7777 | // replicated to all the components of the vector | |||
7778 | if (CheckAltivecInitFromScalar(E->getSourceRange(), Ty, | |||
7779 | VTy->getElementType())) | |||
7780 | return ExprError(); | |||
7781 | if (ShouldSplatAltivecScalarInCast(VTy)) { | |||
7782 | // The number of initializers must be one or must match the size of the | |||
7783 | // vector. If a single value is specified in the initializer then it will | |||
7784 | // be replicated to all the components of the vector | |||
7785 | if (numExprs == 1) { | |||
7786 | QualType ElemTy = VTy->getElementType(); | |||
7787 | ExprResult Literal = DefaultLvalueConversion(exprs[0]); | |||
7788 | if (Literal.isInvalid()) | |||
7789 | return ExprError(); | |||
7790 | Literal = ImpCastExprToType(Literal.get(), ElemTy, | |||
7791 | PrepareScalarCast(Literal, ElemTy)); | |||
7792 | return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.get()); | |||
7793 | } | |||
7794 | else if (numExprs < numElems) { | |||
7795 | Diag(E->getExprLoc(), | |||
7796 | diag::err_incorrect_number_of_vector_initializers); | |||
7797 | return ExprError(); | |||
7798 | } | |||
7799 | else | |||
7800 | initExprs.append(exprs, exprs + numExprs); | |||
7801 | } | |||
7802 | else { | |||
7803 | // For OpenCL, when the number of initializers is a single value, | |||
7804 | // it will be replicated to all components of the vector. | |||
7805 | if (getLangOpts().OpenCL && | |||
7806 | VTy->getVectorKind() == VectorType::GenericVector && | |||
7807 | numExprs == 1) { | |||
7808 | QualType ElemTy = VTy->getElementType(); | |||
7809 | ExprResult Literal = DefaultLvalueConversion(exprs[0]); | |||
7810 | if (Literal.isInvalid()) | |||
7811 | return ExprError(); | |||
7812 | Literal = ImpCastExprToType(Literal.get(), ElemTy, | |||
7813 | PrepareScalarCast(Literal, ElemTy)); | |||
7814 | return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.get()); | |||
7815 | } | |||
7816 | ||||
7817 | initExprs.append(exprs, exprs + numExprs); | |||
7818 | } | |||
7819 | // FIXME: This means that pretty-printing the final AST will produce curly | |||
7820 | // braces instead of the original commas. | |||
7821 | InitListExpr *initE = new (Context) InitListExpr(Context, LiteralLParenLoc, | |||
7822 | initExprs, LiteralRParenLoc); | |||
7823 | initE->setType(Ty); | |||
7824 | return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, initE); | |||
7825 | } | |||
7826 | ||||
7827 | /// This is not an AltiVec-style cast or or C++ direct-initialization, so turn | |||
7828 | /// the ParenListExpr into a sequence of comma binary operators. | |||
7829 | ExprResult | |||
7830 | Sema::MaybeConvertParenListExprToParenExpr(Scope *S, Expr *OrigExpr) { | |||
7831 | ParenListExpr *E = dyn_cast<ParenListExpr>(OrigExpr); | |||
7832 | if (!E) | |||
7833 | return OrigExpr; | |||
7834 | ||||
7835 | ExprResult Result(E->getExpr(0)); | |||
7836 | ||||
7837 | for (unsigned i = 1, e = E->getNumExprs(); i != e && !Result.isInvalid(); ++i) | |||
7838 | Result = ActOnBinOp(S, E->getExprLoc(), tok::comma, Result.get(), | |||
7839 | E->getExpr(i)); | |||
7840 | ||||
7841 | if (Result.isInvalid()) return ExprError(); | |||
7842 | ||||
7843 | return ActOnParenExpr(E->getLParenLoc(), E->getRParenLoc(), Result.get()); | |||
7844 | } | |||
7845 | ||||
7846 | ExprResult Sema::ActOnParenListExpr(SourceLocation L, | |||
7847 | SourceLocation R, | |||
7848 | MultiExprArg Val) { | |||
7849 | return ParenListExpr::Create(Context, L, Val, R); | |||
7850 | } | |||
7851 | ||||
7852 | /// Emit a specialized diagnostic when one expression is a null pointer | |||
7853 | /// constant and the other is not a pointer. Returns true if a diagnostic is | |||
7854 | /// emitted. | |||
7855 | bool Sema::DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, | |||
7856 | SourceLocation QuestionLoc) { | |||
7857 | Expr *NullExpr = LHSExpr; | |||
7858 | Expr *NonPointerExpr = RHSExpr; | |||
7859 | Expr::NullPointerConstantKind NullKind = | |||
7860 | NullExpr->isNullPointerConstant(Context, | |||
7861 | Expr::NPC_ValueDependentIsNotNull); | |||
7862 | ||||
7863 | if (NullKind == Expr::NPCK_NotNull) { | |||
7864 | NullExpr = RHSExpr; | |||
7865 | NonPointerExpr = LHSExpr; | |||
7866 | NullKind = | |||
7867 | NullExpr->isNullPointerConstant(Context, | |||
7868 | Expr::NPC_ValueDependentIsNotNull); | |||
7869 | } | |||
7870 | ||||
7871 | if (NullKind == Expr::NPCK_NotNull) | |||
7872 | return false; | |||
7873 | ||||
7874 | if (NullKind == Expr::NPCK_ZeroExpression) | |||
7875 | return false; | |||
7876 | ||||
7877 | if (NullKind == Expr::NPCK_ZeroLiteral) { | |||
7878 | // In this case, check to make sure that we got here from a "NULL" | |||
7879 | // string in the source code. | |||
7880 | NullExpr = NullExpr->IgnoreParenImpCasts(); | |||
7881 | SourceLocation loc = NullExpr->getExprLoc(); | |||
7882 | if (!findMacroSpelling(loc, "NULL")) | |||
7883 | return false; | |||
7884 | } | |||
7885 | ||||
7886 | int DiagType = (NullKind == Expr::NPCK_CXX11_nullptr); | |||
7887 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands_null) | |||
7888 | << NonPointerExpr->getType() << DiagType | |||
7889 | << NonPointerExpr->getSourceRange(); | |||
7890 | return true; | |||
7891 | } | |||
7892 | ||||
7893 | /// Return false if the condition expression is valid, true otherwise. | |||
7894 | static bool checkCondition(Sema &S, Expr *Cond, SourceLocation QuestionLoc) { | |||
7895 | QualType CondTy = Cond->getType(); | |||
7896 | ||||
7897 | // OpenCL v1.1 s6.3.i says the condition cannot be a floating point type. | |||
7898 | if (S.getLangOpts().OpenCL && CondTy->isFloatingType()) { | |||
7899 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_nonfloat) | |||
7900 | << CondTy << Cond->getSourceRange(); | |||
7901 | return true; | |||
7902 | } | |||
7903 | ||||
7904 | // C99 6.5.15p2 | |||
7905 | if (CondTy->isScalarType()) return false; | |||
7906 | ||||
7907 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_scalar) | |||
7908 | << CondTy << Cond->getSourceRange(); | |||
7909 | return true; | |||
7910 | } | |||
7911 | ||||
7912 | /// Handle when one or both operands are void type. | |||
7913 | static QualType checkConditionalVoidType(Sema &S, ExprResult &LHS, | |||
7914 | ExprResult &RHS) { | |||
7915 | Expr *LHSExpr = LHS.get(); | |||
7916 | Expr *RHSExpr = RHS.get(); | |||
7917 | ||||
7918 | if (!LHSExpr->getType()->isVoidType()) | |||
7919 | S.Diag(RHSExpr->getBeginLoc(), diag::ext_typecheck_cond_one_void) | |||
7920 | << RHSExpr->getSourceRange(); | |||
7921 | if (!RHSExpr->getType()->isVoidType()) | |||
7922 | S.Diag(LHSExpr->getBeginLoc(), diag::ext_typecheck_cond_one_void) | |||
7923 | << LHSExpr->getSourceRange(); | |||
7924 | LHS = S.ImpCastExprToType(LHS.get(), S.Context.VoidTy, CK_ToVoid); | |||
7925 | RHS = S.ImpCastExprToType(RHS.get(), S.Context.VoidTy, CK_ToVoid); | |||
7926 | return S.Context.VoidTy; | |||
7927 | } | |||
7928 | ||||
7929 | /// Return false if the NullExpr can be promoted to PointerTy, | |||
7930 | /// true otherwise. | |||
7931 | static bool checkConditionalNullPointer(Sema &S, ExprResult &NullExpr, | |||
7932 | QualType PointerTy) { | |||
7933 | if ((!PointerTy->isAnyPointerType() && !PointerTy->isBlockPointerType()) || | |||
7934 | !NullExpr.get()->isNullPointerConstant(S.Context, | |||
7935 | Expr::NPC_ValueDependentIsNull)) | |||
7936 | return true; | |||
7937 | ||||
7938 | NullExpr = S.ImpCastExprToType(NullExpr.get(), PointerTy, CK_NullToPointer); | |||
7939 | return false; | |||
7940 | } | |||
7941 | ||||
7942 | /// Checks compatibility between two pointers and return the resulting | |||
7943 | /// type. | |||
7944 | static QualType checkConditionalPointerCompatibility(Sema &S, ExprResult &LHS, | |||
7945 | ExprResult &RHS, | |||
7946 | SourceLocation Loc) { | |||
7947 | QualType LHSTy = LHS.get()->getType(); | |||
7948 | QualType RHSTy = RHS.get()->getType(); | |||
7949 | ||||
7950 | if (S.Context.hasSameType(LHSTy, RHSTy)) { | |||
7951 | // Two identical pointers types are always compatible. | |||
7952 | return LHSTy; | |||
7953 | } | |||
7954 | ||||
7955 | QualType lhptee, rhptee; | |||
7956 | ||||
7957 | // Get the pointee types. | |||
7958 | bool IsBlockPointer = false; | |||
7959 | if (const BlockPointerType *LHSBTy = LHSTy->getAs<BlockPointerType>()) { | |||
7960 | lhptee = LHSBTy->getPointeeType(); | |||
7961 | rhptee = RHSTy->castAs<BlockPointerType>()->getPointeeType(); | |||
7962 | IsBlockPointer = true; | |||
7963 | } else { | |||
7964 | lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
7965 | rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
7966 | } | |||
7967 | ||||
7968 | // C99 6.5.15p6: If both operands are pointers to compatible types or to | |||
7969 | // differently qualified versions of compatible types, the result type is | |||
7970 | // a pointer to an appropriately qualified version of the composite | |||
7971 | // type. | |||
7972 | ||||
7973 | // Only CVR-qualifiers exist in the standard, and the differently-qualified | |||
7974 | // clause doesn't make sense for our extensions. E.g. address space 2 should | |||
7975 | // be incompatible with address space 3: they may live on different devices or | |||
7976 | // anything. | |||
7977 | Qualifiers lhQual = lhptee.getQualifiers(); | |||
7978 | Qualifiers rhQual = rhptee.getQualifiers(); | |||
7979 | ||||
7980 | LangAS ResultAddrSpace = LangAS::Default; | |||
7981 | LangAS LAddrSpace = lhQual.getAddressSpace(); | |||
7982 | LangAS RAddrSpace = rhQual.getAddressSpace(); | |||
7983 | ||||
7984 | // OpenCL v1.1 s6.5 - Conversion between pointers to distinct address | |||
7985 | // spaces is disallowed. | |||
7986 | if (lhQual.isAddressSpaceSupersetOf(rhQual)) | |||
7987 | ResultAddrSpace = LAddrSpace; | |||
7988 | else if (rhQual.isAddressSpaceSupersetOf(lhQual)) | |||
7989 | ResultAddrSpace = RAddrSpace; | |||
7990 | else { | |||
7991 | S.Diag(Loc, diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
7992 | << LHSTy << RHSTy << 2 << LHS.get()->getSourceRange() | |||
7993 | << RHS.get()->getSourceRange(); | |||
7994 | return QualType(); | |||
7995 | } | |||
7996 | ||||
7997 | unsigned MergedCVRQual = lhQual.getCVRQualifiers() | rhQual.getCVRQualifiers(); | |||
7998 | auto LHSCastKind = CK_BitCast, RHSCastKind = CK_BitCast; | |||
7999 | lhQual.removeCVRQualifiers(); | |||
8000 | rhQual.removeCVRQualifiers(); | |||
8001 | ||||
8002 | // OpenCL v2.0 specification doesn't extend compatibility of type qualifiers | |||
8003 | // (C99 6.7.3) for address spaces. We assume that the check should behave in | |||
8004 | // the same manner as it's defined for CVR qualifiers, so for OpenCL two | |||
8005 | // qual types are compatible iff | |||
8006 | // * corresponded types are compatible | |||
8007 | // * CVR qualifiers are equal | |||
8008 | // * address spaces are equal | |||
8009 | // Thus for conditional operator we merge CVR and address space unqualified | |||
8010 | // pointees and if there is a composite type we return a pointer to it with | |||
8011 | // merged qualifiers. | |||
8012 | LHSCastKind = | |||
8013 | LAddrSpace == ResultAddrSpace ? CK_BitCast : CK_AddressSpaceConversion; | |||
8014 | RHSCastKind = | |||
8015 | RAddrSpace == ResultAddrSpace ? CK_BitCast : CK_AddressSpaceConversion; | |||
8016 | lhQual.removeAddressSpace(); | |||
8017 | rhQual.removeAddressSpace(); | |||
8018 | ||||
8019 | lhptee = S.Context.getQualifiedType(lhptee.getUnqualifiedType(), lhQual); | |||
8020 | rhptee = S.Context.getQualifiedType(rhptee.getUnqualifiedType(), rhQual); | |||
8021 | ||||
8022 | QualType CompositeTy = S.Context.mergeTypes(lhptee, rhptee); | |||
8023 | ||||
8024 | if (CompositeTy.isNull()) { | |||
8025 | // In this situation, we assume void* type. No especially good | |||
8026 | // reason, but this is what gcc does, and we do have to pick | |||
8027 | // to get a consistent AST. | |||
8028 | QualType incompatTy; | |||
8029 | incompatTy = S.Context.getPointerType( | |||
8030 | S.Context.getAddrSpaceQualType(S.Context.VoidTy, ResultAddrSpace)); | |||
8031 | LHS = S.ImpCastExprToType(LHS.get(), incompatTy, LHSCastKind); | |||
8032 | RHS = S.ImpCastExprToType(RHS.get(), incompatTy, RHSCastKind); | |||
8033 | ||||
8034 | // FIXME: For OpenCL the warning emission and cast to void* leaves a room | |||
8035 | // for casts between types with incompatible address space qualifiers. | |||
8036 | // For the following code the compiler produces casts between global and | |||
8037 | // local address spaces of the corresponded innermost pointees: | |||
8038 | // local int *global *a; | |||
8039 | // global int *global *b; | |||
8040 | // a = (0 ? a : b); // see C99 6.5.16.1.p1. | |||
8041 | S.Diag(Loc, diag::ext_typecheck_cond_incompatible_pointers) | |||
8042 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8043 | << RHS.get()->getSourceRange(); | |||
8044 | ||||
8045 | return incompatTy; | |||
8046 | } | |||
8047 | ||||
8048 | // The pointer types are compatible. | |||
8049 | // In case of OpenCL ResultTy should have the address space qualifier | |||
8050 | // which is a superset of address spaces of both the 2nd and the 3rd | |||
8051 | // operands of the conditional operator. | |||
8052 | QualType ResultTy = [&, ResultAddrSpace]() { | |||
8053 | if (S.getLangOpts().OpenCL) { | |||
8054 | Qualifiers CompositeQuals = CompositeTy.getQualifiers(); | |||
8055 | CompositeQuals.setAddressSpace(ResultAddrSpace); | |||
8056 | return S.Context | |||
8057 | .getQualifiedType(CompositeTy.getUnqualifiedType(), CompositeQuals) | |||
8058 | .withCVRQualifiers(MergedCVRQual); | |||
8059 | } | |||
8060 | return CompositeTy.withCVRQualifiers(MergedCVRQual); | |||
8061 | }(); | |||
8062 | if (IsBlockPointer) | |||
8063 | ResultTy = S.Context.getBlockPointerType(ResultTy); | |||
8064 | else | |||
8065 | ResultTy = S.Context.getPointerType(ResultTy); | |||
8066 | ||||
8067 | LHS = S.ImpCastExprToType(LHS.get(), ResultTy, LHSCastKind); | |||
8068 | RHS = S.ImpCastExprToType(RHS.get(), ResultTy, RHSCastKind); | |||
8069 | return ResultTy; | |||
8070 | } | |||
8071 | ||||
8072 | /// Return the resulting type when the operands are both block pointers. | |||
8073 | static QualType checkConditionalBlockPointerCompatibility(Sema &S, | |||
8074 | ExprResult &LHS, | |||
8075 | ExprResult &RHS, | |||
8076 | SourceLocation Loc) { | |||
8077 | QualType LHSTy = LHS.get()->getType(); | |||
8078 | QualType RHSTy = RHS.get()->getType(); | |||
8079 | ||||
8080 | if (!LHSTy->isBlockPointerType() || !RHSTy->isBlockPointerType()) { | |||
8081 | if (LHSTy->isVoidPointerType() || RHSTy->isVoidPointerType()) { | |||
8082 | QualType destType = S.Context.getPointerType(S.Context.VoidTy); | |||
8083 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
8084 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
8085 | return destType; | |||
8086 | } | |||
8087 | S.Diag(Loc, diag::err_typecheck_cond_incompatible_operands) | |||
8088 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8089 | << RHS.get()->getSourceRange(); | |||
8090 | return QualType(); | |||
8091 | } | |||
8092 | ||||
8093 | // We have 2 block pointer types. | |||
8094 | return checkConditionalPointerCompatibility(S, LHS, RHS, Loc); | |||
8095 | } | |||
8096 | ||||
8097 | /// Return the resulting type when the operands are both pointers. | |||
8098 | static QualType | |||
8099 | checkConditionalObjectPointersCompatibility(Sema &S, ExprResult &LHS, | |||
8100 | ExprResult &RHS, | |||
8101 | SourceLocation Loc) { | |||
8102 | // get the pointer types | |||
8103 | QualType LHSTy = LHS.get()->getType(); | |||
8104 | QualType RHSTy = RHS.get()->getType(); | |||
8105 | ||||
8106 | // get the "pointed to" types | |||
8107 | QualType lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
8108 | QualType rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
8109 | ||||
8110 | // ignore qualifiers on void (C99 6.5.15p3, clause 6) | |||
8111 | if (lhptee->isVoidType() && rhptee->isIncompleteOrObjectType()) { | |||
8112 | // Figure out necessary qualifiers (C99 6.5.15p6) | |||
8113 | QualType destPointee | |||
8114 | = S.Context.getQualifiedType(lhptee, rhptee.getQualifiers()); | |||
8115 | QualType destType = S.Context.getPointerType(destPointee); | |||
8116 | // Add qualifiers if necessary. | |||
8117 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_NoOp); | |||
8118 | // Promote to void*. | |||
8119 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
8120 | return destType; | |||
8121 | } | |||
8122 | if (rhptee->isVoidType() && lhptee->isIncompleteOrObjectType()) { | |||
8123 | QualType destPointee | |||
8124 | = S.Context.getQualifiedType(rhptee, lhptee.getQualifiers()); | |||
8125 | QualType destType = S.Context.getPointerType(destPointee); | |||
8126 | // Add qualifiers if necessary. | |||
8127 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_NoOp); | |||
8128 | // Promote to void*. | |||
8129 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
8130 | return destType; | |||
8131 | } | |||
8132 | ||||
8133 | return checkConditionalPointerCompatibility(S, LHS, RHS, Loc); | |||
8134 | } | |||
8135 | ||||
8136 | /// Return false if the first expression is not an integer and the second | |||
8137 | /// expression is not a pointer, true otherwise. | |||
8138 | static bool checkPointerIntegerMismatch(Sema &S, ExprResult &Int, | |||
8139 | Expr* PointerExpr, SourceLocation Loc, | |||
8140 | bool IsIntFirstExpr) { | |||
8141 | if (!PointerExpr->getType()->isPointerType() || | |||
8142 | !Int.get()->getType()->isIntegerType()) | |||
8143 | return false; | |||
8144 | ||||
8145 | Expr *Expr1 = IsIntFirstExpr ? Int.get() : PointerExpr; | |||
8146 | Expr *Expr2 = IsIntFirstExpr ? PointerExpr : Int.get(); | |||
8147 | ||||
8148 | S.Diag(Loc, diag::ext_typecheck_cond_pointer_integer_mismatch) | |||
8149 | << Expr1->getType() << Expr2->getType() | |||
8150 | << Expr1->getSourceRange() << Expr2->getSourceRange(); | |||
8151 | Int = S.ImpCastExprToType(Int.get(), PointerExpr->getType(), | |||
8152 | CK_IntegralToPointer); | |||
8153 | return true; | |||
8154 | } | |||
8155 | ||||
8156 | /// Simple conversion between integer and floating point types. | |||
8157 | /// | |||
8158 | /// Used when handling the OpenCL conditional operator where the | |||
8159 | /// condition is a vector while the other operands are scalar. | |||
8160 | /// | |||
8161 | /// OpenCL v1.1 s6.3.i and s6.11.6 together require that the scalar | |||
8162 | /// types are either integer or floating type. Between the two | |||
8163 | /// operands, the type with the higher rank is defined as the "result | |||
8164 | /// type". The other operand needs to be promoted to the same type. No | |||
8165 | /// other type promotion is allowed. We cannot use | |||
8166 | /// UsualArithmeticConversions() for this purpose, since it always | |||
8167 | /// promotes promotable types. | |||
8168 | static QualType OpenCLArithmeticConversions(Sema &S, ExprResult &LHS, | |||
8169 | ExprResult &RHS, | |||
8170 | SourceLocation QuestionLoc) { | |||
8171 | LHS = S.DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
8172 | if (LHS.isInvalid()) | |||
8173 | return QualType(); | |||
8174 | RHS = S.DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
8175 | if (RHS.isInvalid()) | |||
8176 | return QualType(); | |||
8177 | ||||
8178 | // For conversion purposes, we ignore any qualifiers. | |||
8179 | // For example, "const float" and "float" are equivalent. | |||
8180 | QualType LHSType = | |||
8181 | S.Context.getCanonicalType(LHS.get()->getType()).getUnqualifiedType(); | |||
8182 | QualType RHSType = | |||
8183 | S.Context.getCanonicalType(RHS.get()->getType()).getUnqualifiedType(); | |||
8184 | ||||
8185 | if (!LHSType->isIntegerType() && !LHSType->isRealFloatingType()) { | |||
8186 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_int_float) | |||
8187 | << LHSType << LHS.get()->getSourceRange(); | |||
8188 | return QualType(); | |||
8189 | } | |||
8190 | ||||
8191 | if (!RHSType->isIntegerType() && !RHSType->isRealFloatingType()) { | |||
8192 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_int_float) | |||
8193 | << RHSType << RHS.get()->getSourceRange(); | |||
8194 | return QualType(); | |||
8195 | } | |||
8196 | ||||
8197 | // If both types are identical, no conversion is needed. | |||
8198 | if (LHSType == RHSType) | |||
8199 | return LHSType; | |||
8200 | ||||
8201 | // Now handle "real" floating types (i.e. float, double, long double). | |||
8202 | if (LHSType->isRealFloatingType() || RHSType->isRealFloatingType()) | |||
8203 | return handleFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
8204 | /*IsCompAssign = */ false); | |||
8205 | ||||
8206 | // Finally, we have two differing integer types. | |||
8207 | return handleIntegerConversion<doIntegralCast, doIntegralCast> | |||
8208 | (S, LHS, RHS, LHSType, RHSType, /*IsCompAssign = */ false); | |||
8209 | } | |||
8210 | ||||
8211 | /// Convert scalar operands to a vector that matches the | |||
8212 | /// condition in length. | |||
8213 | /// | |||
8214 | /// Used when handling the OpenCL conditional operator where the | |||
8215 | /// condition is a vector while the other operands are scalar. | |||
8216 | /// | |||
8217 | /// We first compute the "result type" for the scalar operands | |||
8218 | /// according to OpenCL v1.1 s6.3.i. Both operands are then converted | |||
8219 | /// into a vector of that type where the length matches the condition | |||
8220 | /// vector type. s6.11.6 requires that the element types of the result | |||
8221 | /// and the condition must have the same number of bits. | |||
8222 | static QualType | |||
8223 | OpenCLConvertScalarsToVectors(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
8224 | QualType CondTy, SourceLocation QuestionLoc) { | |||
8225 | QualType ResTy = OpenCLArithmeticConversions(S, LHS, RHS, QuestionLoc); | |||
8226 | if (ResTy.isNull()) return QualType(); | |||
8227 | ||||
8228 | const VectorType *CV = CondTy->getAs<VectorType>(); | |||
8229 | assert(CV)(static_cast <bool> (CV) ? void (0) : __assert_fail ("CV" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8229, __extension__ __PRETTY_FUNCTION__)); | |||
8230 | ||||
8231 | // Determine the vector result type | |||
8232 | unsigned NumElements = CV->getNumElements(); | |||
8233 | QualType VectorTy = S.Context.getExtVectorType(ResTy, NumElements); | |||
8234 | ||||
8235 | // Ensure that all types have the same number of bits | |||
8236 | if (S.Context.getTypeSize(CV->getElementType()) | |||
8237 | != S.Context.getTypeSize(ResTy)) { | |||
8238 | // Since VectorTy is created internally, it does not pretty print | |||
8239 | // with an OpenCL name. Instead, we just print a description. | |||
8240 | std::string EleTyName = ResTy.getUnqualifiedType().getAsString(); | |||
8241 | SmallString<64> Str; | |||
8242 | llvm::raw_svector_ostream OS(Str); | |||
8243 | OS << "(vector of " << NumElements << " '" << EleTyName << "' values)"; | |||
8244 | S.Diag(QuestionLoc, diag::err_conditional_vector_element_size) | |||
8245 | << CondTy << OS.str(); | |||
8246 | return QualType(); | |||
8247 | } | |||
8248 | ||||
8249 | // Convert operands to the vector result type | |||
8250 | LHS = S.ImpCastExprToType(LHS.get(), VectorTy, CK_VectorSplat); | |||
8251 | RHS = S.ImpCastExprToType(RHS.get(), VectorTy, CK_VectorSplat); | |||
8252 | ||||
8253 | return VectorTy; | |||
8254 | } | |||
8255 | ||||
8256 | /// Return false if this is a valid OpenCL condition vector | |||
8257 | static bool checkOpenCLConditionVector(Sema &S, Expr *Cond, | |||
8258 | SourceLocation QuestionLoc) { | |||
8259 | // OpenCL v1.1 s6.11.6 says the elements of the vector must be of | |||
8260 | // integral type. | |||
8261 | const VectorType *CondTy = Cond->getType()->getAs<VectorType>(); | |||
8262 | assert(CondTy)(static_cast <bool> (CondTy) ? void (0) : __assert_fail ("CondTy", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8262, __extension__ __PRETTY_FUNCTION__)); | |||
8263 | QualType EleTy = CondTy->getElementType(); | |||
8264 | if (EleTy->isIntegerType()) return false; | |||
8265 | ||||
8266 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_nonfloat) | |||
8267 | << Cond->getType() << Cond->getSourceRange(); | |||
8268 | return true; | |||
8269 | } | |||
8270 | ||||
8271 | /// Return false if the vector condition type and the vector | |||
8272 | /// result type are compatible. | |||
8273 | /// | |||
8274 | /// OpenCL v1.1 s6.11.6 requires that both vector types have the same | |||
8275 | /// number of elements, and their element types have the same number | |||
8276 | /// of bits. | |||
8277 | static bool checkVectorResult(Sema &S, QualType CondTy, QualType VecResTy, | |||
8278 | SourceLocation QuestionLoc) { | |||
8279 | const VectorType *CV = CondTy->getAs<VectorType>(); | |||
8280 | const VectorType *RV = VecResTy->getAs<VectorType>(); | |||
8281 | assert(CV && RV)(static_cast <bool> (CV && RV) ? void (0) : __assert_fail ("CV && RV", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8281, __extension__ __PRETTY_FUNCTION__)); | |||
8282 | ||||
8283 | if (CV->getNumElements() != RV->getNumElements()) { | |||
8284 | S.Diag(QuestionLoc, diag::err_conditional_vector_size) | |||
8285 | << CondTy << VecResTy; | |||
8286 | return true; | |||
8287 | } | |||
8288 | ||||
8289 | QualType CVE = CV->getElementType(); | |||
8290 | QualType RVE = RV->getElementType(); | |||
8291 | ||||
8292 | if (S.Context.getTypeSize(CVE) != S.Context.getTypeSize(RVE)) { | |||
8293 | S.Diag(QuestionLoc, diag::err_conditional_vector_element_size) | |||
8294 | << CondTy << VecResTy; | |||
8295 | return true; | |||
8296 | } | |||
8297 | ||||
8298 | return false; | |||
8299 | } | |||
8300 | ||||
8301 | /// Return the resulting type for the conditional operator in | |||
8302 | /// OpenCL (aka "ternary selection operator", OpenCL v1.1 | |||
8303 | /// s6.3.i) when the condition is a vector type. | |||
8304 | static QualType | |||
8305 | OpenCLCheckVectorConditional(Sema &S, ExprResult &Cond, | |||
8306 | ExprResult &LHS, ExprResult &RHS, | |||
8307 | SourceLocation QuestionLoc) { | |||
8308 | Cond = S.DefaultFunctionArrayLvalueConversion(Cond.get()); | |||
8309 | if (Cond.isInvalid()) | |||
8310 | return QualType(); | |||
8311 | QualType CondTy = Cond.get()->getType(); | |||
8312 | ||||
8313 | if (checkOpenCLConditionVector(S, Cond.get(), QuestionLoc)) | |||
8314 | return QualType(); | |||
8315 | ||||
8316 | // If either operand is a vector then find the vector type of the | |||
8317 | // result as specified in OpenCL v1.1 s6.3.i. | |||
8318 | if (LHS.get()->getType()->isVectorType() || | |||
8319 | RHS.get()->getType()->isVectorType()) { | |||
8320 | QualType VecResTy = S.CheckVectorOperands(LHS, RHS, QuestionLoc, | |||
8321 | /*isCompAssign*/false, | |||
8322 | /*AllowBothBool*/true, | |||
8323 | /*AllowBoolConversions*/false); | |||
8324 | if (VecResTy.isNull()) return QualType(); | |||
8325 | // The result type must match the condition type as specified in | |||
8326 | // OpenCL v1.1 s6.11.6. | |||
8327 | if (checkVectorResult(S, CondTy, VecResTy, QuestionLoc)) | |||
8328 | return QualType(); | |||
8329 | return VecResTy; | |||
8330 | } | |||
8331 | ||||
8332 | // Both operands are scalar. | |||
8333 | return OpenCLConvertScalarsToVectors(S, LHS, RHS, CondTy, QuestionLoc); | |||
8334 | } | |||
8335 | ||||
8336 | /// Return true if the Expr is block type | |||
8337 | static bool checkBlockType(Sema &S, const Expr *E) { | |||
8338 | if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { | |||
8339 | QualType Ty = CE->getCallee()->getType(); | |||
8340 | if (Ty->isBlockPointerType()) { | |||
8341 | S.Diag(E->getExprLoc(), diag::err_opencl_ternary_with_block); | |||
8342 | return true; | |||
8343 | } | |||
8344 | } | |||
8345 | return false; | |||
8346 | } | |||
8347 | ||||
8348 | /// Note that LHS is not null here, even if this is the gnu "x ?: y" extension. | |||
8349 | /// In that case, LHS = cond. | |||
8350 | /// C99 6.5.15 | |||
8351 | QualType Sema::CheckConditionalOperands(ExprResult &Cond, ExprResult &LHS, | |||
8352 | ExprResult &RHS, ExprValueKind &VK, | |||
8353 | ExprObjectKind &OK, | |||
8354 | SourceLocation QuestionLoc) { | |||
8355 | ||||
8356 | ExprResult LHSResult = CheckPlaceholderExpr(LHS.get()); | |||
8357 | if (!LHSResult.isUsable()) return QualType(); | |||
8358 | LHS = LHSResult; | |||
8359 | ||||
8360 | ExprResult RHSResult = CheckPlaceholderExpr(RHS.get()); | |||
8361 | if (!RHSResult.isUsable()) return QualType(); | |||
8362 | RHS = RHSResult; | |||
8363 | ||||
8364 | // C++ is sufficiently different to merit its own checker. | |||
8365 | if (getLangOpts().CPlusPlus) | |||
8366 | return CXXCheckConditionalOperands(Cond, LHS, RHS, VK, OK, QuestionLoc); | |||
8367 | ||||
8368 | VK = VK_PRValue; | |||
8369 | OK = OK_Ordinary; | |||
8370 | ||||
8371 | if (Context.isDependenceAllowed() && | |||
8372 | (Cond.get()->isTypeDependent() || LHS.get()->isTypeDependent() || | |||
8373 | RHS.get()->isTypeDependent())) { | |||
8374 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8374, __extension__ __PRETTY_FUNCTION__)); | |||
8375 | assert((Cond.get()->containsErrors() || LHS.get()->containsErrors() ||(static_cast <bool> ((Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8377, __extension__ __PRETTY_FUNCTION__)) | |||
8376 | RHS.get()->containsErrors()) &&(static_cast <bool> ((Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8377, __extension__ __PRETTY_FUNCTION__)) | |||
8377 | "should only occur in error-recovery path.")(static_cast <bool> ((Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(Cond.get()->containsErrors() || LHS.get()->containsErrors() || RHS.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8377, __extension__ __PRETTY_FUNCTION__)); | |||
8378 | return Context.DependentTy; | |||
8379 | } | |||
8380 | ||||
8381 | // The OpenCL operator with a vector condition is sufficiently | |||
8382 | // different to merit its own checker. | |||
8383 | if ((getLangOpts().OpenCL && Cond.get()->getType()->isVectorType()) || | |||
8384 | Cond.get()->getType()->isExtVectorType()) | |||
8385 | return OpenCLCheckVectorConditional(*this, Cond, LHS, RHS, QuestionLoc); | |||
8386 | ||||
8387 | // First, check the condition. | |||
8388 | Cond = UsualUnaryConversions(Cond.get()); | |||
8389 | if (Cond.isInvalid()) | |||
8390 | return QualType(); | |||
8391 | if (checkCondition(*this, Cond.get(), QuestionLoc)) | |||
8392 | return QualType(); | |||
8393 | ||||
8394 | // Now check the two expressions. | |||
8395 | if (LHS.get()->getType()->isVectorType() || | |||
8396 | RHS.get()->getType()->isVectorType()) | |||
8397 | return CheckVectorOperands(LHS, RHS, QuestionLoc, /*isCompAssign*/false, | |||
8398 | /*AllowBothBool*/true, | |||
8399 | /*AllowBoolConversions*/false); | |||
8400 | ||||
8401 | QualType ResTy = | |||
8402 | UsualArithmeticConversions(LHS, RHS, QuestionLoc, ACK_Conditional); | |||
8403 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
8404 | return QualType(); | |||
8405 | ||||
8406 | QualType LHSTy = LHS.get()->getType(); | |||
8407 | QualType RHSTy = RHS.get()->getType(); | |||
8408 | ||||
8409 | // Diagnose attempts to convert between __float128 and long double where | |||
8410 | // such conversions currently can't be handled. | |||
8411 | if (unsupportedTypeConversion(*this, LHSTy, RHSTy)) { | |||
8412 | Diag(QuestionLoc, | |||
8413 | diag::err_typecheck_cond_incompatible_operands) << LHSTy << RHSTy | |||
8414 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
8415 | return QualType(); | |||
8416 | } | |||
8417 | ||||
8418 | // OpenCL v2.0 s6.12.5 - Blocks cannot be used as expressions of the ternary | |||
8419 | // selection operator (?:). | |||
8420 | if (getLangOpts().OpenCL && | |||
8421 | (checkBlockType(*this, LHS.get()) | checkBlockType(*this, RHS.get()))) { | |||
8422 | return QualType(); | |||
8423 | } | |||
8424 | ||||
8425 | // If both operands have arithmetic type, do the usual arithmetic conversions | |||
8426 | // to find a common type: C99 6.5.15p3,5. | |||
8427 | if (LHSTy->isArithmeticType() && RHSTy->isArithmeticType()) { | |||
8428 | // Disallow invalid arithmetic conversions, such as those between ExtInts of | |||
8429 | // different sizes, or between ExtInts and other types. | |||
8430 | if (ResTy.isNull() && (LHSTy->isExtIntType() || RHSTy->isExtIntType())) { | |||
8431 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) | |||
8432 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8433 | << RHS.get()->getSourceRange(); | |||
8434 | return QualType(); | |||
8435 | } | |||
8436 | ||||
8437 | LHS = ImpCastExprToType(LHS.get(), ResTy, PrepareScalarCast(LHS, ResTy)); | |||
8438 | RHS = ImpCastExprToType(RHS.get(), ResTy, PrepareScalarCast(RHS, ResTy)); | |||
8439 | ||||
8440 | return ResTy; | |||
8441 | } | |||
8442 | ||||
8443 | // And if they're both bfloat (which isn't arithmetic), that's fine too. | |||
8444 | if (LHSTy->isBFloat16Type() && RHSTy->isBFloat16Type()) { | |||
8445 | return LHSTy; | |||
8446 | } | |||
8447 | ||||
8448 | // If both operands are the same structure or union type, the result is that | |||
8449 | // type. | |||
8450 | if (const RecordType *LHSRT = LHSTy->getAs<RecordType>()) { // C99 6.5.15p3 | |||
8451 | if (const RecordType *RHSRT = RHSTy->getAs<RecordType>()) | |||
8452 | if (LHSRT->getDecl() == RHSRT->getDecl()) | |||
8453 | // "If both the operands have structure or union type, the result has | |||
8454 | // that type." This implies that CV qualifiers are dropped. | |||
8455 | return LHSTy.getUnqualifiedType(); | |||
8456 | // FIXME: Type of conditional expression must be complete in C mode. | |||
8457 | } | |||
8458 | ||||
8459 | // C99 6.5.15p5: "If both operands have void type, the result has void type." | |||
8460 | // The following || allows only one side to be void (a GCC-ism). | |||
8461 | if (LHSTy->isVoidType() || RHSTy->isVoidType()) { | |||
8462 | return checkConditionalVoidType(*this, LHS, RHS); | |||
8463 | } | |||
8464 | ||||
8465 | // C99 6.5.15p6 - "if one operand is a null pointer constant, the result has | |||
8466 | // the type of the other operand." | |||
8467 | if (!checkConditionalNullPointer(*this, RHS, LHSTy)) return LHSTy; | |||
8468 | if (!checkConditionalNullPointer(*this, LHS, RHSTy)) return RHSTy; | |||
8469 | ||||
8470 | // All objective-c pointer type analysis is done here. | |||
8471 | QualType compositeType = FindCompositeObjCPointerType(LHS, RHS, | |||
8472 | QuestionLoc); | |||
8473 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
8474 | return QualType(); | |||
8475 | if (!compositeType.isNull()) | |||
8476 | return compositeType; | |||
8477 | ||||
8478 | ||||
8479 | // Handle block pointer types. | |||
8480 | if (LHSTy->isBlockPointerType() || RHSTy->isBlockPointerType()) | |||
8481 | return checkConditionalBlockPointerCompatibility(*this, LHS, RHS, | |||
8482 | QuestionLoc); | |||
8483 | ||||
8484 | // Check constraints for C object pointers types (C99 6.5.15p3,6). | |||
8485 | if (LHSTy->isPointerType() && RHSTy->isPointerType()) | |||
8486 | return checkConditionalObjectPointersCompatibility(*this, LHS, RHS, | |||
8487 | QuestionLoc); | |||
8488 | ||||
8489 | // GCC compatibility: soften pointer/integer mismatch. Note that | |||
8490 | // null pointers have been filtered out by this point. | |||
8491 | if (checkPointerIntegerMismatch(*this, LHS, RHS.get(), QuestionLoc, | |||
8492 | /*IsIntFirstExpr=*/true)) | |||
8493 | return RHSTy; | |||
8494 | if (checkPointerIntegerMismatch(*this, RHS, LHS.get(), QuestionLoc, | |||
8495 | /*IsIntFirstExpr=*/false)) | |||
8496 | return LHSTy; | |||
8497 | ||||
8498 | // Allow ?: operations in which both operands have the same | |||
8499 | // built-in sizeless type. | |||
8500 | if (LHSTy->isSizelessBuiltinType() && Context.hasSameType(LHSTy, RHSTy)) | |||
8501 | return LHSTy; | |||
8502 | ||||
8503 | // Emit a better diagnostic if one of the expressions is a null pointer | |||
8504 | // constant and the other is not a pointer type. In this case, the user most | |||
8505 | // likely forgot to take the address of the other expression. | |||
8506 | if (DiagnoseConditionalForNull(LHS.get(), RHS.get(), QuestionLoc)) | |||
8507 | return QualType(); | |||
8508 | ||||
8509 | // Otherwise, the operands are not compatible. | |||
8510 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) | |||
8511 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8512 | << RHS.get()->getSourceRange(); | |||
8513 | return QualType(); | |||
8514 | } | |||
8515 | ||||
8516 | /// FindCompositeObjCPointerType - Helper method to find composite type of | |||
8517 | /// two objective-c pointer types of the two input expressions. | |||
8518 | QualType Sema::FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, | |||
8519 | SourceLocation QuestionLoc) { | |||
8520 | QualType LHSTy = LHS.get()->getType(); | |||
8521 | QualType RHSTy = RHS.get()->getType(); | |||
8522 | ||||
8523 | // Handle things like Class and struct objc_class*. Here we case the result | |||
8524 | // to the pseudo-builtin, because that will be implicitly cast back to the | |||
8525 | // redefinition type if an attempt is made to access its fields. | |||
8526 | if (LHSTy->isObjCClassType() && | |||
8527 | (Context.hasSameType(RHSTy, Context.getObjCClassRedefinitionType()))) { | |||
8528 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_CPointerToObjCPointerCast); | |||
8529 | return LHSTy; | |||
8530 | } | |||
8531 | if (RHSTy->isObjCClassType() && | |||
8532 | (Context.hasSameType(LHSTy, Context.getObjCClassRedefinitionType()))) { | |||
8533 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_CPointerToObjCPointerCast); | |||
8534 | return RHSTy; | |||
8535 | } | |||
8536 | // And the same for struct objc_object* / id | |||
8537 | if (LHSTy->isObjCIdType() && | |||
8538 | (Context.hasSameType(RHSTy, Context.getObjCIdRedefinitionType()))) { | |||
8539 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_CPointerToObjCPointerCast); | |||
8540 | return LHSTy; | |||
8541 | } | |||
8542 | if (RHSTy->isObjCIdType() && | |||
8543 | (Context.hasSameType(LHSTy, Context.getObjCIdRedefinitionType()))) { | |||
8544 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_CPointerToObjCPointerCast); | |||
8545 | return RHSTy; | |||
8546 | } | |||
8547 | // And the same for struct objc_selector* / SEL | |||
8548 | if (Context.isObjCSelType(LHSTy) && | |||
8549 | (Context.hasSameType(RHSTy, Context.getObjCSelRedefinitionType()))) { | |||
8550 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_BitCast); | |||
8551 | return LHSTy; | |||
8552 | } | |||
8553 | if (Context.isObjCSelType(RHSTy) && | |||
8554 | (Context.hasSameType(LHSTy, Context.getObjCSelRedefinitionType()))) { | |||
8555 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_BitCast); | |||
8556 | return RHSTy; | |||
8557 | } | |||
8558 | // Check constraints for Objective-C object pointers types. | |||
8559 | if (LHSTy->isObjCObjectPointerType() && RHSTy->isObjCObjectPointerType()) { | |||
8560 | ||||
8561 | if (Context.getCanonicalType(LHSTy) == Context.getCanonicalType(RHSTy)) { | |||
8562 | // Two identical object pointer types are always compatible. | |||
8563 | return LHSTy; | |||
8564 | } | |||
8565 | const ObjCObjectPointerType *LHSOPT = LHSTy->castAs<ObjCObjectPointerType>(); | |||
8566 | const ObjCObjectPointerType *RHSOPT = RHSTy->castAs<ObjCObjectPointerType>(); | |||
8567 | QualType compositeType = LHSTy; | |||
8568 | ||||
8569 | // If both operands are interfaces and either operand can be | |||
8570 | // assigned to the other, use that type as the composite | |||
8571 | // type. This allows | |||
8572 | // xxx ? (A*) a : (B*) b | |||
8573 | // where B is a subclass of A. | |||
8574 | // | |||
8575 | // Additionally, as for assignment, if either type is 'id' | |||
8576 | // allow silent coercion. Finally, if the types are | |||
8577 | // incompatible then make sure to use 'id' as the composite | |||
8578 | // type so the result is acceptable for sending messages to. | |||
8579 | ||||
8580 | // FIXME: Consider unifying with 'areComparableObjCPointerTypes'. | |||
8581 | // It could return the composite type. | |||
8582 | if (!(compositeType = | |||
8583 | Context.areCommonBaseCompatible(LHSOPT, RHSOPT)).isNull()) { | |||
8584 | // Nothing more to do. | |||
8585 | } else if (Context.canAssignObjCInterfaces(LHSOPT, RHSOPT)) { | |||
8586 | compositeType = RHSOPT->isObjCBuiltinType() ? RHSTy : LHSTy; | |||
8587 | } else if (Context.canAssignObjCInterfaces(RHSOPT, LHSOPT)) { | |||
8588 | compositeType = LHSOPT->isObjCBuiltinType() ? LHSTy : RHSTy; | |||
8589 | } else if ((LHSOPT->isObjCQualifiedIdType() || | |||
8590 | RHSOPT->isObjCQualifiedIdType()) && | |||
8591 | Context.ObjCQualifiedIdTypesAreCompatible(LHSOPT, RHSOPT, | |||
8592 | true)) { | |||
8593 | // Need to handle "id<xx>" explicitly. | |||
8594 | // GCC allows qualified id and any Objective-C type to devolve to | |||
8595 | // id. Currently localizing to here until clear this should be | |||
8596 | // part of ObjCQualifiedIdTypesAreCompatible. | |||
8597 | compositeType = Context.getObjCIdType(); | |||
8598 | } else if (LHSTy->isObjCIdType() || RHSTy->isObjCIdType()) { | |||
8599 | compositeType = Context.getObjCIdType(); | |||
8600 | } else { | |||
8601 | Diag(QuestionLoc, diag::ext_typecheck_cond_incompatible_operands) | |||
8602 | << LHSTy << RHSTy | |||
8603 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
8604 | QualType incompatTy = Context.getObjCIdType(); | |||
8605 | LHS = ImpCastExprToType(LHS.get(), incompatTy, CK_BitCast); | |||
8606 | RHS = ImpCastExprToType(RHS.get(), incompatTy, CK_BitCast); | |||
8607 | return incompatTy; | |||
8608 | } | |||
8609 | // The object pointer types are compatible. | |||
8610 | LHS = ImpCastExprToType(LHS.get(), compositeType, CK_BitCast); | |||
8611 | RHS = ImpCastExprToType(RHS.get(), compositeType, CK_BitCast); | |||
8612 | return compositeType; | |||
8613 | } | |||
8614 | // Check Objective-C object pointer types and 'void *' | |||
8615 | if (LHSTy->isVoidPointerType() && RHSTy->isObjCObjectPointerType()) { | |||
8616 | if (getLangOpts().ObjCAutoRefCount) { | |||
8617 | // ARC forbids the implicit conversion of object pointers to 'void *', | |||
8618 | // so these types are not compatible. | |||
8619 | Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy | |||
8620 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
8621 | LHS = RHS = true; | |||
8622 | return QualType(); | |||
8623 | } | |||
8624 | QualType lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
8625 | QualType rhptee = RHSTy->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
8626 | QualType destPointee | |||
8627 | = Context.getQualifiedType(lhptee, rhptee.getQualifiers()); | |||
8628 | QualType destType = Context.getPointerType(destPointee); | |||
8629 | // Add qualifiers if necessary. | |||
8630 | LHS = ImpCastExprToType(LHS.get(), destType, CK_NoOp); | |||
8631 | // Promote to void*. | |||
8632 | RHS = ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
8633 | return destType; | |||
8634 | } | |||
8635 | if (LHSTy->isObjCObjectPointerType() && RHSTy->isVoidPointerType()) { | |||
8636 | if (getLangOpts().ObjCAutoRefCount) { | |||
8637 | // ARC forbids the implicit conversion of object pointers to 'void *', | |||
8638 | // so these types are not compatible. | |||
8639 | Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy | |||
8640 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
8641 | LHS = RHS = true; | |||
8642 | return QualType(); | |||
8643 | } | |||
8644 | QualType lhptee = LHSTy->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
8645 | QualType rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
8646 | QualType destPointee | |||
8647 | = Context.getQualifiedType(rhptee, lhptee.getQualifiers()); | |||
8648 | QualType destType = Context.getPointerType(destPointee); | |||
8649 | // Add qualifiers if necessary. | |||
8650 | RHS = ImpCastExprToType(RHS.get(), destType, CK_NoOp); | |||
8651 | // Promote to void*. | |||
8652 | LHS = ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
8653 | return destType; | |||
8654 | } | |||
8655 | return QualType(); | |||
8656 | } | |||
8657 | ||||
8658 | /// SuggestParentheses - Emit a note with a fixit hint that wraps | |||
8659 | /// ParenRange in parentheses. | |||
8660 | static void SuggestParentheses(Sema &Self, SourceLocation Loc, | |||
8661 | const PartialDiagnostic &Note, | |||
8662 | SourceRange ParenRange) { | |||
8663 | SourceLocation EndLoc = Self.getLocForEndOfToken(ParenRange.getEnd()); | |||
8664 | if (ParenRange.getBegin().isFileID() && ParenRange.getEnd().isFileID() && | |||
8665 | EndLoc.isValid()) { | |||
8666 | Self.Diag(Loc, Note) | |||
8667 | << FixItHint::CreateInsertion(ParenRange.getBegin(), "(") | |||
8668 | << FixItHint::CreateInsertion(EndLoc, ")"); | |||
8669 | } else { | |||
8670 | // We can't display the parentheses, so just show the bare note. | |||
8671 | Self.Diag(Loc, Note) << ParenRange; | |||
8672 | } | |||
8673 | } | |||
8674 | ||||
8675 | static bool IsArithmeticOp(BinaryOperatorKind Opc) { | |||
8676 | return BinaryOperator::isAdditiveOp(Opc) || | |||
8677 | BinaryOperator::isMultiplicativeOp(Opc) || | |||
8678 | BinaryOperator::isShiftOp(Opc) || Opc == BO_And || Opc == BO_Or; | |||
8679 | // This only checks for bitwise-or and bitwise-and, but not bitwise-xor and | |||
8680 | // not any of the logical operators. Bitwise-xor is commonly used as a | |||
8681 | // logical-xor because there is no logical-xor operator. The logical | |||
8682 | // operators, including uses of xor, have a high false positive rate for | |||
8683 | // precedence warnings. | |||
8684 | } | |||
8685 | ||||
8686 | /// IsArithmeticBinaryExpr - Returns true if E is an arithmetic binary | |||
8687 | /// expression, either using a built-in or overloaded operator, | |||
8688 | /// and sets *OpCode to the opcode and *RHSExprs to the right-hand side | |||
8689 | /// expression. | |||
8690 | static bool IsArithmeticBinaryExpr(Expr *E, BinaryOperatorKind *Opcode, | |||
8691 | Expr **RHSExprs) { | |||
8692 | // Don't strip parenthesis: we should not warn if E is in parenthesis. | |||
8693 | E = E->IgnoreImpCasts(); | |||
8694 | E = E->IgnoreConversionOperatorSingleStep(); | |||
8695 | E = E->IgnoreImpCasts(); | |||
8696 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
8697 | E = MTE->getSubExpr(); | |||
8698 | E = E->IgnoreImpCasts(); | |||
8699 | } | |||
8700 | ||||
8701 | // Built-in binary operator. | |||
8702 | if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E)) { | |||
8703 | if (IsArithmeticOp(OP->getOpcode())) { | |||
8704 | *Opcode = OP->getOpcode(); | |||
8705 | *RHSExprs = OP->getRHS(); | |||
8706 | return true; | |||
8707 | } | |||
8708 | } | |||
8709 | ||||
8710 | // Overloaded operator. | |||
8711 | if (CXXOperatorCallExpr *Call = dyn_cast<CXXOperatorCallExpr>(E)) { | |||
8712 | if (Call->getNumArgs() != 2) | |||
8713 | return false; | |||
8714 | ||||
8715 | // Make sure this is really a binary operator that is safe to pass into | |||
8716 | // BinaryOperator::getOverloadedOpcode(), e.g. it's not a subscript op. | |||
8717 | OverloadedOperatorKind OO = Call->getOperator(); | |||
8718 | if (OO < OO_Plus || OO > OO_Arrow || | |||
8719 | OO == OO_PlusPlus || OO == OO_MinusMinus) | |||
8720 | return false; | |||
8721 | ||||
8722 | BinaryOperatorKind OpKind = BinaryOperator::getOverloadedOpcode(OO); | |||
8723 | if (IsArithmeticOp(OpKind)) { | |||
8724 | *Opcode = OpKind; | |||
8725 | *RHSExprs = Call->getArg(1); | |||
8726 | return true; | |||
8727 | } | |||
8728 | } | |||
8729 | ||||
8730 | return false; | |||
8731 | } | |||
8732 | ||||
8733 | /// ExprLooksBoolean - Returns true if E looks boolean, i.e. it has boolean type | |||
8734 | /// or is a logical expression such as (x==y) which has int type, but is | |||
8735 | /// commonly interpreted as boolean. | |||
8736 | static bool ExprLooksBoolean(Expr *E) { | |||
8737 | E = E->IgnoreParenImpCasts(); | |||
8738 | ||||
8739 | if (E->getType()->isBooleanType()) | |||
8740 | return true; | |||
8741 | if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E)) | |||
8742 | return OP->isComparisonOp() || OP->isLogicalOp(); | |||
8743 | if (UnaryOperator *OP = dyn_cast<UnaryOperator>(E)) | |||
8744 | return OP->getOpcode() == UO_LNot; | |||
8745 | if (E->getType()->isPointerType()) | |||
8746 | return true; | |||
8747 | // FIXME: What about overloaded operator calls returning "unspecified boolean | |||
8748 | // type"s (commonly pointer-to-members)? | |||
8749 | ||||
8750 | return false; | |||
8751 | } | |||
8752 | ||||
8753 | /// DiagnoseConditionalPrecedence - Emit a warning when a conditional operator | |||
8754 | /// and binary operator are mixed in a way that suggests the programmer assumed | |||
8755 | /// the conditional operator has higher precedence, for example: | |||
8756 | /// "int x = a + someBinaryCondition ? 1 : 2". | |||
8757 | static void DiagnoseConditionalPrecedence(Sema &Self, | |||
8758 | SourceLocation OpLoc, | |||
8759 | Expr *Condition, | |||
8760 | Expr *LHSExpr, | |||
8761 | Expr *RHSExpr) { | |||
8762 | BinaryOperatorKind CondOpcode; | |||
8763 | Expr *CondRHS; | |||
8764 | ||||
8765 | if (!IsArithmeticBinaryExpr(Condition, &CondOpcode, &CondRHS)) | |||
8766 | return; | |||
8767 | if (!ExprLooksBoolean(CondRHS)) | |||
8768 | return; | |||
8769 | ||||
8770 | // The condition is an arithmetic binary expression, with a right- | |||
8771 | // hand side that looks boolean, so warn. | |||
8772 | ||||
8773 | unsigned DiagID = BinaryOperator::isBitwiseOp(CondOpcode) | |||
8774 | ? diag::warn_precedence_bitwise_conditional | |||
8775 | : diag::warn_precedence_conditional; | |||
8776 | ||||
8777 | Self.Diag(OpLoc, DiagID) | |||
8778 | << Condition->getSourceRange() | |||
8779 | << BinaryOperator::getOpcodeStr(CondOpcode); | |||
8780 | ||||
8781 | SuggestParentheses( | |||
8782 | Self, OpLoc, | |||
8783 | Self.PDiag(diag::note_precedence_silence) | |||
8784 | << BinaryOperator::getOpcodeStr(CondOpcode), | |||
8785 | SourceRange(Condition->getBeginLoc(), Condition->getEndLoc())); | |||
8786 | ||||
8787 | SuggestParentheses(Self, OpLoc, | |||
8788 | Self.PDiag(diag::note_precedence_conditional_first), | |||
8789 | SourceRange(CondRHS->getBeginLoc(), RHSExpr->getEndLoc())); | |||
8790 | } | |||
8791 | ||||
8792 | /// Compute the nullability of a conditional expression. | |||
8793 | static QualType computeConditionalNullability(QualType ResTy, bool IsBin, | |||
8794 | QualType LHSTy, QualType RHSTy, | |||
8795 | ASTContext &Ctx) { | |||
8796 | if (!ResTy->isAnyPointerType()) | |||
8797 | return ResTy; | |||
8798 | ||||
8799 | auto GetNullability = [&Ctx](QualType Ty) { | |||
8800 | Optional<NullabilityKind> Kind = Ty->getNullability(Ctx); | |||
8801 | if (Kind) { | |||
8802 | // For our purposes, treat _Nullable_result as _Nullable. | |||
8803 | if (*Kind == NullabilityKind::NullableResult) | |||
8804 | return NullabilityKind::Nullable; | |||
8805 | return *Kind; | |||
8806 | } | |||
8807 | return NullabilityKind::Unspecified; | |||
8808 | }; | |||
8809 | ||||
8810 | auto LHSKind = GetNullability(LHSTy), RHSKind = GetNullability(RHSTy); | |||
8811 | NullabilityKind MergedKind; | |||
8812 | ||||
8813 | // Compute nullability of a binary conditional expression. | |||
8814 | if (IsBin) { | |||
8815 | if (LHSKind == NullabilityKind::NonNull) | |||
8816 | MergedKind = NullabilityKind::NonNull; | |||
8817 | else | |||
8818 | MergedKind = RHSKind; | |||
8819 | // Compute nullability of a normal conditional expression. | |||
8820 | } else { | |||
8821 | if (LHSKind == NullabilityKind::Nullable || | |||
8822 | RHSKind == NullabilityKind::Nullable) | |||
8823 | MergedKind = NullabilityKind::Nullable; | |||
8824 | else if (LHSKind == NullabilityKind::NonNull) | |||
8825 | MergedKind = RHSKind; | |||
8826 | else if (RHSKind == NullabilityKind::NonNull) | |||
8827 | MergedKind = LHSKind; | |||
8828 | else | |||
8829 | MergedKind = NullabilityKind::Unspecified; | |||
8830 | } | |||
8831 | ||||
8832 | // Return if ResTy already has the correct nullability. | |||
8833 | if (GetNullability(ResTy) == MergedKind) | |||
8834 | return ResTy; | |||
8835 | ||||
8836 | // Strip all nullability from ResTy. | |||
8837 | while (ResTy->getNullability(Ctx)) | |||
8838 | ResTy = ResTy.getSingleStepDesugaredType(Ctx); | |||
8839 | ||||
8840 | // Create a new AttributedType with the new nullability kind. | |||
8841 | auto NewAttr = AttributedType::getNullabilityAttrKind(MergedKind); | |||
8842 | return Ctx.getAttributedType(NewAttr, ResTy, ResTy); | |||
8843 | } | |||
8844 | ||||
8845 | /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null | |||
8846 | /// in the case of a the GNU conditional expr extension. | |||
8847 | ExprResult Sema::ActOnConditionalOp(SourceLocation QuestionLoc, | |||
8848 | SourceLocation ColonLoc, | |||
8849 | Expr *CondExpr, Expr *LHSExpr, | |||
8850 | Expr *RHSExpr) { | |||
8851 | if (!Context.isDependenceAllowed()) { | |||
8852 | // C cannot handle TypoExpr nodes in the condition because it | |||
8853 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
8854 | // been dealt with before checking the operands. | |||
8855 | ExprResult CondResult = CorrectDelayedTyposInExpr(CondExpr); | |||
8856 | ExprResult LHSResult = CorrectDelayedTyposInExpr(LHSExpr); | |||
8857 | ExprResult RHSResult = CorrectDelayedTyposInExpr(RHSExpr); | |||
8858 | ||||
8859 | if (!CondResult.isUsable()) | |||
8860 | return ExprError(); | |||
8861 | ||||
8862 | if (LHSExpr) { | |||
8863 | if (!LHSResult.isUsable()) | |||
8864 | return ExprError(); | |||
8865 | } | |||
8866 | ||||
8867 | if (!RHSResult.isUsable()) | |||
8868 | return ExprError(); | |||
8869 | ||||
8870 | CondExpr = CondResult.get(); | |||
8871 | LHSExpr = LHSResult.get(); | |||
8872 | RHSExpr = RHSResult.get(); | |||
8873 | } | |||
8874 | ||||
8875 | // If this is the gnu "x ?: y" extension, analyze the types as though the LHS | |||
8876 | // was the condition. | |||
8877 | OpaqueValueExpr *opaqueValue = nullptr; | |||
8878 | Expr *commonExpr = nullptr; | |||
8879 | if (!LHSExpr) { | |||
8880 | commonExpr = CondExpr; | |||
8881 | // Lower out placeholder types first. This is important so that we don't | |||
8882 | // try to capture a placeholder. This happens in few cases in C++; such | |||
8883 | // as Objective-C++'s dictionary subscripting syntax. | |||
8884 | if (commonExpr->hasPlaceholderType()) { | |||
8885 | ExprResult result = CheckPlaceholderExpr(commonExpr); | |||
8886 | if (!result.isUsable()) return ExprError(); | |||
8887 | commonExpr = result.get(); | |||
8888 | } | |||
8889 | // We usually want to apply unary conversions *before* saving, except | |||
8890 | // in the special case of a C++ l-value conditional. | |||
8891 | if (!(getLangOpts().CPlusPlus | |||
8892 | && !commonExpr->isTypeDependent() | |||
8893 | && commonExpr->getValueKind() == RHSExpr->getValueKind() | |||
8894 | && commonExpr->isGLValue() | |||
8895 | && commonExpr->isOrdinaryOrBitFieldObject() | |||
8896 | && RHSExpr->isOrdinaryOrBitFieldObject() | |||
8897 | && Context.hasSameType(commonExpr->getType(), RHSExpr->getType()))) { | |||
8898 | ExprResult commonRes = UsualUnaryConversions(commonExpr); | |||
8899 | if (commonRes.isInvalid()) | |||
8900 | return ExprError(); | |||
8901 | commonExpr = commonRes.get(); | |||
8902 | } | |||
8903 | ||||
8904 | // If the common expression is a class or array prvalue, materialize it | |||
8905 | // so that we can safely refer to it multiple times. | |||
8906 | if (commonExpr->isPRValue() && (commonExpr->getType()->isRecordType() || | |||
8907 | commonExpr->getType()->isArrayType())) { | |||
8908 | ExprResult MatExpr = TemporaryMaterializationConversion(commonExpr); | |||
8909 | if (MatExpr.isInvalid()) | |||
8910 | return ExprError(); | |||
8911 | commonExpr = MatExpr.get(); | |||
8912 | } | |||
8913 | ||||
8914 | opaqueValue = new (Context) OpaqueValueExpr(commonExpr->getExprLoc(), | |||
8915 | commonExpr->getType(), | |||
8916 | commonExpr->getValueKind(), | |||
8917 | commonExpr->getObjectKind(), | |||
8918 | commonExpr); | |||
8919 | LHSExpr = CondExpr = opaqueValue; | |||
8920 | } | |||
8921 | ||||
8922 | QualType LHSTy = LHSExpr->getType(), RHSTy = RHSExpr->getType(); | |||
8923 | ExprValueKind VK = VK_PRValue; | |||
8924 | ExprObjectKind OK = OK_Ordinary; | |||
8925 | ExprResult Cond = CondExpr, LHS = LHSExpr, RHS = RHSExpr; | |||
8926 | QualType result = CheckConditionalOperands(Cond, LHS, RHS, | |||
8927 | VK, OK, QuestionLoc); | |||
8928 | if (result.isNull() || Cond.isInvalid() || LHS.isInvalid() || | |||
8929 | RHS.isInvalid()) | |||
8930 | return ExprError(); | |||
8931 | ||||
8932 | DiagnoseConditionalPrecedence(*this, QuestionLoc, Cond.get(), LHS.get(), | |||
8933 | RHS.get()); | |||
8934 | ||||
8935 | CheckBoolLikeConversion(Cond.get(), QuestionLoc); | |||
8936 | ||||
8937 | result = computeConditionalNullability(result, commonExpr, LHSTy, RHSTy, | |||
8938 | Context); | |||
8939 | ||||
8940 | if (!commonExpr) | |||
8941 | return new (Context) | |||
8942 | ConditionalOperator(Cond.get(), QuestionLoc, LHS.get(), ColonLoc, | |||
8943 | RHS.get(), result, VK, OK); | |||
8944 | ||||
8945 | return new (Context) BinaryConditionalOperator( | |||
8946 | commonExpr, opaqueValue, Cond.get(), LHS.get(), RHS.get(), QuestionLoc, | |||
8947 | ColonLoc, result, VK, OK); | |||
8948 | } | |||
8949 | ||||
8950 | // Check if we have a conversion between incompatible cmse function pointer | |||
8951 | // types, that is, a conversion between a function pointer with the | |||
8952 | // cmse_nonsecure_call attribute and one without. | |||
8953 | static bool IsInvalidCmseNSCallConversion(Sema &S, QualType FromType, | |||
8954 | QualType ToType) { | |||
8955 | if (const auto *ToFn = | |||
8956 | dyn_cast<FunctionType>(S.Context.getCanonicalType(ToType))) { | |||
8957 | if (const auto *FromFn = | |||
8958 | dyn_cast<FunctionType>(S.Context.getCanonicalType(FromType))) { | |||
8959 | FunctionType::ExtInfo ToEInfo = ToFn->getExtInfo(); | |||
8960 | FunctionType::ExtInfo FromEInfo = FromFn->getExtInfo(); | |||
8961 | ||||
8962 | return ToEInfo.getCmseNSCall() != FromEInfo.getCmseNSCall(); | |||
8963 | } | |||
8964 | } | |||
8965 | return false; | |||
8966 | } | |||
8967 | ||||
8968 | // checkPointerTypesForAssignment - This is a very tricky routine (despite | |||
8969 | // being closely modeled after the C99 spec:-). The odd characteristic of this | |||
8970 | // routine is it effectively iqnores the qualifiers on the top level pointee. | |||
8971 | // This circumvents the usual type rules specified in 6.2.7p1 & 6.7.5.[1-3]. | |||
8972 | // FIXME: add a couple examples in this comment. | |||
8973 | static Sema::AssignConvertType | |||
8974 | checkPointerTypesForAssignment(Sema &S, QualType LHSType, QualType RHSType) { | |||
8975 | assert(LHSType.isCanonical() && "LHS not canonicalized!")(static_cast <bool> (LHSType.isCanonical() && "LHS not canonicalized!" ) ? void (0) : __assert_fail ("LHSType.isCanonical() && \"LHS not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8975, __extension__ __PRETTY_FUNCTION__)); | |||
8976 | assert(RHSType.isCanonical() && "RHS not canonicalized!")(static_cast <bool> (RHSType.isCanonical() && "RHS not canonicalized!" ) ? void (0) : __assert_fail ("RHSType.isCanonical() && \"RHS not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 8976, __extension__ __PRETTY_FUNCTION__)); | |||
8977 | ||||
8978 | // get the "pointed to" type (ignoring qualifiers at the top level) | |||
8979 | const Type *lhptee, *rhptee; | |||
8980 | Qualifiers lhq, rhq; | |||
8981 | std::tie(lhptee, lhq) = | |||
8982 | cast<PointerType>(LHSType)->getPointeeType().split().asPair(); | |||
8983 | std::tie(rhptee, rhq) = | |||
8984 | cast<PointerType>(RHSType)->getPointeeType().split().asPair(); | |||
8985 | ||||
8986 | Sema::AssignConvertType ConvTy = Sema::Compatible; | |||
8987 | ||||
8988 | // C99 6.5.16.1p1: This following citation is common to constraints | |||
8989 | // 3 & 4 (below). ...and the type *pointed to* by the left has all the | |||
8990 | // qualifiers of the type *pointed to* by the right; | |||
8991 | ||||
8992 | // As a special case, 'non-__weak A *' -> 'non-__weak const *' is okay. | |||
8993 | if (lhq.getObjCLifetime() != rhq.getObjCLifetime() && | |||
8994 | lhq.compatiblyIncludesObjCLifetime(rhq)) { | |||
8995 | // Ignore lifetime for further calculation. | |||
8996 | lhq.removeObjCLifetime(); | |||
8997 | rhq.removeObjCLifetime(); | |||
8998 | } | |||
8999 | ||||
9000 | if (!lhq.compatiblyIncludes(rhq)) { | |||
9001 | // Treat address-space mismatches as fatal. | |||
9002 | if (!lhq.isAddressSpaceSupersetOf(rhq)) | |||
9003 | return Sema::IncompatiblePointerDiscardsQualifiers; | |||
9004 | ||||
9005 | // It's okay to add or remove GC or lifetime qualifiers when converting to | |||
9006 | // and from void*. | |||
9007 | else if (lhq.withoutObjCGCAttr().withoutObjCLifetime() | |||
9008 | .compatiblyIncludes( | |||
9009 | rhq.withoutObjCGCAttr().withoutObjCLifetime()) | |||
9010 | && (lhptee->isVoidType() || rhptee->isVoidType())) | |||
9011 | ; // keep old | |||
9012 | ||||
9013 | // Treat lifetime mismatches as fatal. | |||
9014 | else if (lhq.getObjCLifetime() != rhq.getObjCLifetime()) | |||
9015 | ConvTy = Sema::IncompatiblePointerDiscardsQualifiers; | |||
9016 | ||||
9017 | // For GCC/MS compatibility, other qualifier mismatches are treated | |||
9018 | // as still compatible in C. | |||
9019 | else ConvTy = Sema::CompatiblePointerDiscardsQualifiers; | |||
9020 | } | |||
9021 | ||||
9022 | // C99 6.5.16.1p1 (constraint 4): If one operand is a pointer to an object or | |||
9023 | // incomplete type and the other is a pointer to a qualified or unqualified | |||
9024 | // version of void... | |||
9025 | if (lhptee->isVoidType()) { | |||
9026 | if (rhptee->isIncompleteOrObjectType()) | |||
9027 | return ConvTy; | |||
9028 | ||||
9029 | // As an extension, we allow cast to/from void* to function pointer. | |||
9030 | assert(rhptee->isFunctionType())(static_cast <bool> (rhptee->isFunctionType()) ? void (0) : __assert_fail ("rhptee->isFunctionType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9030, __extension__ __PRETTY_FUNCTION__)); | |||
9031 | return Sema::FunctionVoidPointer; | |||
9032 | } | |||
9033 | ||||
9034 | if (rhptee->isVoidType()) { | |||
9035 | if (lhptee->isIncompleteOrObjectType()) | |||
9036 | return ConvTy; | |||
9037 | ||||
9038 | // As an extension, we allow cast to/from void* to function pointer. | |||
9039 | assert(lhptee->isFunctionType())(static_cast <bool> (lhptee->isFunctionType()) ? void (0) : __assert_fail ("lhptee->isFunctionType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9039, __extension__ __PRETTY_FUNCTION__)); | |||
9040 | return Sema::FunctionVoidPointer; | |||
9041 | } | |||
9042 | ||||
9043 | // C99 6.5.16.1p1 (constraint 3): both operands are pointers to qualified or | |||
9044 | // unqualified versions of compatible types, ... | |||
9045 | QualType ltrans = QualType(lhptee, 0), rtrans = QualType(rhptee, 0); | |||
9046 | if (!S.Context.typesAreCompatible(ltrans, rtrans)) { | |||
9047 | // Check if the pointee types are compatible ignoring the sign. | |||
9048 | // We explicitly check for char so that we catch "char" vs | |||
9049 | // "unsigned char" on systems where "char" is unsigned. | |||
9050 | if (lhptee->isCharType()) | |||
9051 | ltrans = S.Context.UnsignedCharTy; | |||
9052 | else if (lhptee->hasSignedIntegerRepresentation()) | |||
9053 | ltrans = S.Context.getCorrespondingUnsignedType(ltrans); | |||
9054 | ||||
9055 | if (rhptee->isCharType()) | |||
9056 | rtrans = S.Context.UnsignedCharTy; | |||
9057 | else if (rhptee->hasSignedIntegerRepresentation()) | |||
9058 | rtrans = S.Context.getCorrespondingUnsignedType(rtrans); | |||
9059 | ||||
9060 | if (ltrans == rtrans) { | |||
9061 | // Types are compatible ignoring the sign. Qualifier incompatibility | |||
9062 | // takes priority over sign incompatibility because the sign | |||
9063 | // warning can be disabled. | |||
9064 | if (ConvTy != Sema::Compatible) | |||
9065 | return ConvTy; | |||
9066 | ||||
9067 | return Sema::IncompatiblePointerSign; | |||
9068 | } | |||
9069 | ||||
9070 | // If we are a multi-level pointer, it's possible that our issue is simply | |||
9071 | // one of qualification - e.g. char ** -> const char ** is not allowed. If | |||
9072 | // the eventual target type is the same and the pointers have the same | |||
9073 | // level of indirection, this must be the issue. | |||
9074 | if (isa<PointerType>(lhptee) && isa<PointerType>(rhptee)) { | |||
9075 | do { | |||
9076 | std::tie(lhptee, lhq) = | |||
9077 | cast<PointerType>(lhptee)->getPointeeType().split().asPair(); | |||
9078 | std::tie(rhptee, rhq) = | |||
9079 | cast<PointerType>(rhptee)->getPointeeType().split().asPair(); | |||
9080 | ||||
9081 | // Inconsistent address spaces at this point is invalid, even if the | |||
9082 | // address spaces would be compatible. | |||
9083 | // FIXME: This doesn't catch address space mismatches for pointers of | |||
9084 | // different nesting levels, like: | |||
9085 | // __local int *** a; | |||
9086 | // int ** b = a; | |||
9087 | // It's not clear how to actually determine when such pointers are | |||
9088 | // invalidly incompatible. | |||
9089 | if (lhq.getAddressSpace() != rhq.getAddressSpace()) | |||
9090 | return Sema::IncompatibleNestedPointerAddressSpaceMismatch; | |||
9091 | ||||
9092 | } while (isa<PointerType>(lhptee) && isa<PointerType>(rhptee)); | |||
9093 | ||||
9094 | if (lhptee == rhptee) | |||
9095 | return Sema::IncompatibleNestedPointerQualifiers; | |||
9096 | } | |||
9097 | ||||
9098 | // General pointer incompatibility takes priority over qualifiers. | |||
9099 | if (RHSType->isFunctionPointerType() && LHSType->isFunctionPointerType()) | |||
9100 | return Sema::IncompatibleFunctionPointer; | |||
9101 | return Sema::IncompatiblePointer; | |||
9102 | } | |||
9103 | if (!S.getLangOpts().CPlusPlus && | |||
9104 | S.IsFunctionConversion(ltrans, rtrans, ltrans)) | |||
9105 | return Sema::IncompatibleFunctionPointer; | |||
9106 | if (IsInvalidCmseNSCallConversion(S, ltrans, rtrans)) | |||
9107 | return Sema::IncompatibleFunctionPointer; | |||
9108 | return ConvTy; | |||
9109 | } | |||
9110 | ||||
9111 | /// checkBlockPointerTypesForAssignment - This routine determines whether two | |||
9112 | /// block pointer types are compatible or whether a block and normal pointer | |||
9113 | /// are compatible. It is more restrict than comparing two function pointer | |||
9114 | // types. | |||
9115 | static Sema::AssignConvertType | |||
9116 | checkBlockPointerTypesForAssignment(Sema &S, QualType LHSType, | |||
9117 | QualType RHSType) { | |||
9118 | assert(LHSType.isCanonical() && "LHS not canonicalized!")(static_cast <bool> (LHSType.isCanonical() && "LHS not canonicalized!" ) ? void (0) : __assert_fail ("LHSType.isCanonical() && \"LHS not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9118, __extension__ __PRETTY_FUNCTION__)); | |||
9119 | assert(RHSType.isCanonical() && "RHS not canonicalized!")(static_cast <bool> (RHSType.isCanonical() && "RHS not canonicalized!" ) ? void (0) : __assert_fail ("RHSType.isCanonical() && \"RHS not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9119, __extension__ __PRETTY_FUNCTION__)); | |||
9120 | ||||
9121 | QualType lhptee, rhptee; | |||
9122 | ||||
9123 | // get the "pointed to" type (ignoring qualifiers at the top level) | |||
9124 | lhptee = cast<BlockPointerType>(LHSType)->getPointeeType(); | |||
9125 | rhptee = cast<BlockPointerType>(RHSType)->getPointeeType(); | |||
9126 | ||||
9127 | // In C++, the types have to match exactly. | |||
9128 | if (S.getLangOpts().CPlusPlus) | |||
9129 | return Sema::IncompatibleBlockPointer; | |||
9130 | ||||
9131 | Sema::AssignConvertType ConvTy = Sema::Compatible; | |||
9132 | ||||
9133 | // For blocks we enforce that qualifiers are identical. | |||
9134 | Qualifiers LQuals = lhptee.getLocalQualifiers(); | |||
9135 | Qualifiers RQuals = rhptee.getLocalQualifiers(); | |||
9136 | if (S.getLangOpts().OpenCL) { | |||
9137 | LQuals.removeAddressSpace(); | |||
9138 | RQuals.removeAddressSpace(); | |||
9139 | } | |||
9140 | if (LQuals != RQuals) | |||
9141 | ConvTy = Sema::CompatiblePointerDiscardsQualifiers; | |||
9142 | ||||
9143 | // FIXME: OpenCL doesn't define the exact compile time semantics for a block | |||
9144 | // assignment. | |||
9145 | // The current behavior is similar to C++ lambdas. A block might be | |||
9146 | // assigned to a variable iff its return type and parameters are compatible | |||
9147 | // (C99 6.2.7) with the corresponding return type and parameters of the LHS of | |||
9148 | // an assignment. Presumably it should behave in way that a function pointer | |||
9149 | // assignment does in C, so for each parameter and return type: | |||
9150 | // * CVR and address space of LHS should be a superset of CVR and address | |||
9151 | // space of RHS. | |||
9152 | // * unqualified types should be compatible. | |||
9153 | if (S.getLangOpts().OpenCL) { | |||
9154 | if (!S.Context.typesAreBlockPointerCompatible( | |||
9155 | S.Context.getQualifiedType(LHSType.getUnqualifiedType(), LQuals), | |||
9156 | S.Context.getQualifiedType(RHSType.getUnqualifiedType(), RQuals))) | |||
9157 | return Sema::IncompatibleBlockPointer; | |||
9158 | } else if (!S.Context.typesAreBlockPointerCompatible(LHSType, RHSType)) | |||
9159 | return Sema::IncompatibleBlockPointer; | |||
9160 | ||||
9161 | return ConvTy; | |||
9162 | } | |||
9163 | ||||
9164 | /// checkObjCPointerTypesForAssignment - Compares two objective-c pointer types | |||
9165 | /// for assignment compatibility. | |||
9166 | static Sema::AssignConvertType | |||
9167 | checkObjCPointerTypesForAssignment(Sema &S, QualType LHSType, | |||
9168 | QualType RHSType) { | |||
9169 | assert(LHSType.isCanonical() && "LHS was not canonicalized!")(static_cast <bool> (LHSType.isCanonical() && "LHS was not canonicalized!" ) ? void (0) : __assert_fail ("LHSType.isCanonical() && \"LHS was not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9169, __extension__ __PRETTY_FUNCTION__)); | |||
9170 | assert(RHSType.isCanonical() && "RHS was not canonicalized!")(static_cast <bool> (RHSType.isCanonical() && "RHS was not canonicalized!" ) ? void (0) : __assert_fail ("RHSType.isCanonical() && \"RHS was not canonicalized!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9170, __extension__ __PRETTY_FUNCTION__)); | |||
9171 | ||||
9172 | if (LHSType->isObjCBuiltinType()) { | |||
9173 | // Class is not compatible with ObjC object pointers. | |||
9174 | if (LHSType->isObjCClassType() && !RHSType->isObjCBuiltinType() && | |||
9175 | !RHSType->isObjCQualifiedClassType()) | |||
9176 | return Sema::IncompatiblePointer; | |||
9177 | return Sema::Compatible; | |||
9178 | } | |||
9179 | if (RHSType->isObjCBuiltinType()) { | |||
9180 | if (RHSType->isObjCClassType() && !LHSType->isObjCBuiltinType() && | |||
9181 | !LHSType->isObjCQualifiedClassType()) | |||
9182 | return Sema::IncompatiblePointer; | |||
9183 | return Sema::Compatible; | |||
9184 | } | |||
9185 | QualType lhptee = LHSType->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9186 | QualType rhptee = RHSType->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9187 | ||||
9188 | if (!lhptee.isAtLeastAsQualifiedAs(rhptee) && | |||
9189 | // make an exception for id<P> | |||
9190 | !LHSType->isObjCQualifiedIdType()) | |||
9191 | return Sema::CompatiblePointerDiscardsQualifiers; | |||
9192 | ||||
9193 | if (S.Context.typesAreCompatible(LHSType, RHSType)) | |||
9194 | return Sema::Compatible; | |||
9195 | if (LHSType->isObjCQualifiedIdType() || RHSType->isObjCQualifiedIdType()) | |||
9196 | return Sema::IncompatibleObjCQualifiedId; | |||
9197 | return Sema::IncompatiblePointer; | |||
9198 | } | |||
9199 | ||||
9200 | Sema::AssignConvertType | |||
9201 | Sema::CheckAssignmentConstraints(SourceLocation Loc, | |||
9202 | QualType LHSType, QualType RHSType) { | |||
9203 | // Fake up an opaque expression. We don't actually care about what | |||
9204 | // cast operations are required, so if CheckAssignmentConstraints | |||
9205 | // adds casts to this they'll be wasted, but fortunately that doesn't | |||
9206 | // usually happen on valid code. | |||
9207 | OpaqueValueExpr RHSExpr(Loc, RHSType, VK_PRValue); | |||
9208 | ExprResult RHSPtr = &RHSExpr; | |||
9209 | CastKind K; | |||
9210 | ||||
9211 | return CheckAssignmentConstraints(LHSType, RHSPtr, K, /*ConvertRHS=*/false); | |||
9212 | } | |||
9213 | ||||
9214 | /// This helper function returns true if QT is a vector type that has element | |||
9215 | /// type ElementType. | |||
9216 | static bool isVector(QualType QT, QualType ElementType) { | |||
9217 | if (const VectorType *VT = QT->getAs<VectorType>()) | |||
9218 | return VT->getElementType().getCanonicalType() == ElementType; | |||
9219 | return false; | |||
9220 | } | |||
9221 | ||||
9222 | /// CheckAssignmentConstraints (C99 6.5.16) - This routine currently | |||
9223 | /// has code to accommodate several GCC extensions when type checking | |||
9224 | /// pointers. Here are some objectionable examples that GCC considers warnings: | |||
9225 | /// | |||
9226 | /// int a, *pint; | |||
9227 | /// short *pshort; | |||
9228 | /// struct foo *pfoo; | |||
9229 | /// | |||
9230 | /// pint = pshort; // warning: assignment from incompatible pointer type | |||
9231 | /// a = pint; // warning: assignment makes integer from pointer without a cast | |||
9232 | /// pint = a; // warning: assignment makes pointer from integer without a cast | |||
9233 | /// pint = pfoo; // warning: assignment from incompatible pointer type | |||
9234 | /// | |||
9235 | /// As a result, the code for dealing with pointers is more complex than the | |||
9236 | /// C99 spec dictates. | |||
9237 | /// | |||
9238 | /// Sets 'Kind' for any result kind except Incompatible. | |||
9239 | Sema::AssignConvertType | |||
9240 | Sema::CheckAssignmentConstraints(QualType LHSType, ExprResult &RHS, | |||
9241 | CastKind &Kind, bool ConvertRHS) { | |||
9242 | QualType RHSType = RHS.get()->getType(); | |||
9243 | QualType OrigLHSType = LHSType; | |||
9244 | ||||
9245 | // Get canonical types. We're not formatting these types, just comparing | |||
9246 | // them. | |||
9247 | LHSType = Context.getCanonicalType(LHSType).getUnqualifiedType(); | |||
9248 | RHSType = Context.getCanonicalType(RHSType).getUnqualifiedType(); | |||
9249 | ||||
9250 | // Common case: no conversion required. | |||
9251 | if (LHSType == RHSType) { | |||
9252 | Kind = CK_NoOp; | |||
9253 | return Compatible; | |||
9254 | } | |||
9255 | ||||
9256 | // If we have an atomic type, try a non-atomic assignment, then just add an | |||
9257 | // atomic qualification step. | |||
9258 | if (const AtomicType *AtomicTy = dyn_cast<AtomicType>(LHSType)) { | |||
9259 | Sema::AssignConvertType result = | |||
9260 | CheckAssignmentConstraints(AtomicTy->getValueType(), RHS, Kind); | |||
9261 | if (result != Compatible) | |||
9262 | return result; | |||
9263 | if (Kind != CK_NoOp && ConvertRHS) | |||
9264 | RHS = ImpCastExprToType(RHS.get(), AtomicTy->getValueType(), Kind); | |||
9265 | Kind = CK_NonAtomicToAtomic; | |||
9266 | return Compatible; | |||
9267 | } | |||
9268 | ||||
9269 | // If the left-hand side is a reference type, then we are in a | |||
9270 | // (rare!) case where we've allowed the use of references in C, | |||
9271 | // e.g., as a parameter type in a built-in function. In this case, | |||
9272 | // just make sure that the type referenced is compatible with the | |||
9273 | // right-hand side type. The caller is responsible for adjusting | |||
9274 | // LHSType so that the resulting expression does not have reference | |||
9275 | // type. | |||
9276 | if (const ReferenceType *LHSTypeRef = LHSType->getAs<ReferenceType>()) { | |||
9277 | if (Context.typesAreCompatible(LHSTypeRef->getPointeeType(), RHSType)) { | |||
9278 | Kind = CK_LValueBitCast; | |||
9279 | return Compatible; | |||
9280 | } | |||
9281 | return Incompatible; | |||
9282 | } | |||
9283 | ||||
9284 | // Allow scalar to ExtVector assignments, and assignments of an ExtVector type | |||
9285 | // to the same ExtVector type. | |||
9286 | if (LHSType->isExtVectorType()) { | |||
9287 | if (RHSType->isExtVectorType()) | |||
9288 | return Incompatible; | |||
9289 | if (RHSType->isArithmeticType()) { | |||
9290 | // CK_VectorSplat does T -> vector T, so first cast to the element type. | |||
9291 | if (ConvertRHS) | |||
9292 | RHS = prepareVectorSplat(LHSType, RHS.get()); | |||
9293 | Kind = CK_VectorSplat; | |||
9294 | return Compatible; | |||
9295 | } | |||
9296 | } | |||
9297 | ||||
9298 | // Conversions to or from vector type. | |||
9299 | if (LHSType->isVectorType() || RHSType->isVectorType()) { | |||
9300 | if (LHSType->isVectorType() && RHSType->isVectorType()) { | |||
9301 | // Allow assignments of an AltiVec vector type to an equivalent GCC | |||
9302 | // vector type and vice versa | |||
9303 | if (Context.areCompatibleVectorTypes(LHSType, RHSType)) { | |||
9304 | Kind = CK_BitCast; | |||
9305 | return Compatible; | |||
9306 | } | |||
9307 | ||||
9308 | // If we are allowing lax vector conversions, and LHS and RHS are both | |||
9309 | // vectors, the total size only needs to be the same. This is a bitcast; | |||
9310 | // no bits are changed but the result type is different. | |||
9311 | if (isLaxVectorConversion(RHSType, LHSType)) { | |||
9312 | Kind = CK_BitCast; | |||
9313 | return IncompatibleVectors; | |||
9314 | } | |||
9315 | } | |||
9316 | ||||
9317 | // When the RHS comes from another lax conversion (e.g. binops between | |||
9318 | // scalars and vectors) the result is canonicalized as a vector. When the | |||
9319 | // LHS is also a vector, the lax is allowed by the condition above. Handle | |||
9320 | // the case where LHS is a scalar. | |||
9321 | if (LHSType->isScalarType()) { | |||
9322 | const VectorType *VecType = RHSType->getAs<VectorType>(); | |||
9323 | if (VecType && VecType->getNumElements() == 1 && | |||
9324 | isLaxVectorConversion(RHSType, LHSType)) { | |||
9325 | ExprResult *VecExpr = &RHS; | |||
9326 | *VecExpr = ImpCastExprToType(VecExpr->get(), LHSType, CK_BitCast); | |||
9327 | Kind = CK_BitCast; | |||
9328 | return Compatible; | |||
9329 | } | |||
9330 | } | |||
9331 | ||||
9332 | // Allow assignments between fixed-length and sizeless SVE vectors. | |||
9333 | if ((LHSType->isSizelessBuiltinType() && RHSType->isVectorType()) || | |||
9334 | (LHSType->isVectorType() && RHSType->isSizelessBuiltinType())) | |||
9335 | if (Context.areCompatibleSveTypes(LHSType, RHSType) || | |||
9336 | Context.areLaxCompatibleSveTypes(LHSType, RHSType)) { | |||
9337 | Kind = CK_BitCast; | |||
9338 | return Compatible; | |||
9339 | } | |||
9340 | ||||
9341 | return Incompatible; | |||
9342 | } | |||
9343 | ||||
9344 | // Diagnose attempts to convert between __float128 and long double where | |||
9345 | // such conversions currently can't be handled. | |||
9346 | if (unsupportedTypeConversion(*this, LHSType, RHSType)) | |||
9347 | return Incompatible; | |||
9348 | ||||
9349 | // Disallow assigning a _Complex to a real type in C++ mode since it simply | |||
9350 | // discards the imaginary part. | |||
9351 | if (getLangOpts().CPlusPlus && RHSType->getAs<ComplexType>() && | |||
9352 | !LHSType->getAs<ComplexType>()) | |||
9353 | return Incompatible; | |||
9354 | ||||
9355 | // Arithmetic conversions. | |||
9356 | if (LHSType->isArithmeticType() && RHSType->isArithmeticType() && | |||
9357 | !(getLangOpts().CPlusPlus && LHSType->isEnumeralType())) { | |||
9358 | if (ConvertRHS) | |||
9359 | Kind = PrepareScalarCast(RHS, LHSType); | |||
9360 | return Compatible; | |||
9361 | } | |||
9362 | ||||
9363 | // Conversions to normal pointers. | |||
9364 | if (const PointerType *LHSPointer = dyn_cast<PointerType>(LHSType)) { | |||
9365 | // U* -> T* | |||
9366 | if (isa<PointerType>(RHSType)) { | |||
9367 | LangAS AddrSpaceL = LHSPointer->getPointeeType().getAddressSpace(); | |||
9368 | LangAS AddrSpaceR = RHSType->getPointeeType().getAddressSpace(); | |||
9369 | if (AddrSpaceL != AddrSpaceR) | |||
9370 | Kind = CK_AddressSpaceConversion; | |||
9371 | else if (Context.hasCvrSimilarType(RHSType, LHSType)) | |||
9372 | Kind = CK_NoOp; | |||
9373 | else | |||
9374 | Kind = CK_BitCast; | |||
9375 | return checkPointerTypesForAssignment(*this, LHSType, RHSType); | |||
9376 | } | |||
9377 | ||||
9378 | // int -> T* | |||
9379 | if (RHSType->isIntegerType()) { | |||
9380 | Kind = CK_IntegralToPointer; // FIXME: null? | |||
9381 | return IntToPointer; | |||
9382 | } | |||
9383 | ||||
9384 | // C pointers are not compatible with ObjC object pointers, | |||
9385 | // with two exceptions: | |||
9386 | if (isa<ObjCObjectPointerType>(RHSType)) { | |||
9387 | // - conversions to void* | |||
9388 | if (LHSPointer->getPointeeType()->isVoidType()) { | |||
9389 | Kind = CK_BitCast; | |||
9390 | return Compatible; | |||
9391 | } | |||
9392 | ||||
9393 | // - conversions from 'Class' to the redefinition type | |||
9394 | if (RHSType->isObjCClassType() && | |||
9395 | Context.hasSameType(LHSType, | |||
9396 | Context.getObjCClassRedefinitionType())) { | |||
9397 | Kind = CK_BitCast; | |||
9398 | return Compatible; | |||
9399 | } | |||
9400 | ||||
9401 | Kind = CK_BitCast; | |||
9402 | return IncompatiblePointer; | |||
9403 | } | |||
9404 | ||||
9405 | // U^ -> void* | |||
9406 | if (RHSType->getAs<BlockPointerType>()) { | |||
9407 | if (LHSPointer->getPointeeType()->isVoidType()) { | |||
9408 | LangAS AddrSpaceL = LHSPointer->getPointeeType().getAddressSpace(); | |||
9409 | LangAS AddrSpaceR = RHSType->getAs<BlockPointerType>() | |||
9410 | ->getPointeeType() | |||
9411 | .getAddressSpace(); | |||
9412 | Kind = | |||
9413 | AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion : CK_BitCast; | |||
9414 | return Compatible; | |||
9415 | } | |||
9416 | } | |||
9417 | ||||
9418 | return Incompatible; | |||
9419 | } | |||
9420 | ||||
9421 | // Conversions to block pointers. | |||
9422 | if (isa<BlockPointerType>(LHSType)) { | |||
9423 | // U^ -> T^ | |||
9424 | if (RHSType->isBlockPointerType()) { | |||
9425 | LangAS AddrSpaceL = LHSType->getAs<BlockPointerType>() | |||
9426 | ->getPointeeType() | |||
9427 | .getAddressSpace(); | |||
9428 | LangAS AddrSpaceR = RHSType->getAs<BlockPointerType>() | |||
9429 | ->getPointeeType() | |||
9430 | .getAddressSpace(); | |||
9431 | Kind = AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion : CK_BitCast; | |||
9432 | return checkBlockPointerTypesForAssignment(*this, LHSType, RHSType); | |||
9433 | } | |||
9434 | ||||
9435 | // int or null -> T^ | |||
9436 | if (RHSType->isIntegerType()) { | |||
9437 | Kind = CK_IntegralToPointer; // FIXME: null | |||
9438 | return IntToBlockPointer; | |||
9439 | } | |||
9440 | ||||
9441 | // id -> T^ | |||
9442 | if (getLangOpts().ObjC && RHSType->isObjCIdType()) { | |||
9443 | Kind = CK_AnyPointerToBlockPointerCast; | |||
9444 | return Compatible; | |||
9445 | } | |||
9446 | ||||
9447 | // void* -> T^ | |||
9448 | if (const PointerType *RHSPT = RHSType->getAs<PointerType>()) | |||
9449 | if (RHSPT->getPointeeType()->isVoidType()) { | |||
9450 | Kind = CK_AnyPointerToBlockPointerCast; | |||
9451 | return Compatible; | |||
9452 | } | |||
9453 | ||||
9454 | return Incompatible; | |||
9455 | } | |||
9456 | ||||
9457 | // Conversions to Objective-C pointers. | |||
9458 | if (isa<ObjCObjectPointerType>(LHSType)) { | |||
9459 | // A* -> B* | |||
9460 | if (RHSType->isObjCObjectPointerType()) { | |||
9461 | Kind = CK_BitCast; | |||
9462 | Sema::AssignConvertType result = | |||
9463 | checkObjCPointerTypesForAssignment(*this, LHSType, RHSType); | |||
9464 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
9465 | result == Compatible && | |||
9466 | !CheckObjCARCUnavailableWeakConversion(OrigLHSType, RHSType)) | |||
9467 | result = IncompatibleObjCWeakRef; | |||
9468 | return result; | |||
9469 | } | |||
9470 | ||||
9471 | // int or null -> A* | |||
9472 | if (RHSType->isIntegerType()) { | |||
9473 | Kind = CK_IntegralToPointer; // FIXME: null | |||
9474 | return IntToPointer; | |||
9475 | } | |||
9476 | ||||
9477 | // In general, C pointers are not compatible with ObjC object pointers, | |||
9478 | // with two exceptions: | |||
9479 | if (isa<PointerType>(RHSType)) { | |||
9480 | Kind = CK_CPointerToObjCPointerCast; | |||
9481 | ||||
9482 | // - conversions from 'void*' | |||
9483 | if (RHSType->isVoidPointerType()) { | |||
9484 | return Compatible; | |||
9485 | } | |||
9486 | ||||
9487 | // - conversions to 'Class' from its redefinition type | |||
9488 | if (LHSType->isObjCClassType() && | |||
9489 | Context.hasSameType(RHSType, | |||
9490 | Context.getObjCClassRedefinitionType())) { | |||
9491 | return Compatible; | |||
9492 | } | |||
9493 | ||||
9494 | return IncompatiblePointer; | |||
9495 | } | |||
9496 | ||||
9497 | // Only under strict condition T^ is compatible with an Objective-C pointer. | |||
9498 | if (RHSType->isBlockPointerType() && | |||
9499 | LHSType->isBlockCompatibleObjCPointerType(Context)) { | |||
9500 | if (ConvertRHS) | |||
9501 | maybeExtendBlockObject(RHS); | |||
9502 | Kind = CK_BlockPointerToObjCPointerCast; | |||
9503 | return Compatible; | |||
9504 | } | |||
9505 | ||||
9506 | return Incompatible; | |||
9507 | } | |||
9508 | ||||
9509 | // Conversions from pointers that are not covered by the above. | |||
9510 | if (isa<PointerType>(RHSType)) { | |||
9511 | // T* -> _Bool | |||
9512 | if (LHSType == Context.BoolTy) { | |||
9513 | Kind = CK_PointerToBoolean; | |||
9514 | return Compatible; | |||
9515 | } | |||
9516 | ||||
9517 | // T* -> int | |||
9518 | if (LHSType->isIntegerType()) { | |||
9519 | Kind = CK_PointerToIntegral; | |||
9520 | return PointerToInt; | |||
9521 | } | |||
9522 | ||||
9523 | return Incompatible; | |||
9524 | } | |||
9525 | ||||
9526 | // Conversions from Objective-C pointers that are not covered by the above. | |||
9527 | if (isa<ObjCObjectPointerType>(RHSType)) { | |||
9528 | // T* -> _Bool | |||
9529 | if (LHSType == Context.BoolTy) { | |||
9530 | Kind = CK_PointerToBoolean; | |||
9531 | return Compatible; | |||
9532 | } | |||
9533 | ||||
9534 | // T* -> int | |||
9535 | if (LHSType->isIntegerType()) { | |||
9536 | Kind = CK_PointerToIntegral; | |||
9537 | return PointerToInt; | |||
9538 | } | |||
9539 | ||||
9540 | return Incompatible; | |||
9541 | } | |||
9542 | ||||
9543 | // struct A -> struct B | |||
9544 | if (isa<TagType>(LHSType) && isa<TagType>(RHSType)) { | |||
9545 | if (Context.typesAreCompatible(LHSType, RHSType)) { | |||
9546 | Kind = CK_NoOp; | |||
9547 | return Compatible; | |||
9548 | } | |||
9549 | } | |||
9550 | ||||
9551 | if (LHSType->isSamplerT() && RHSType->isIntegerType()) { | |||
9552 | Kind = CK_IntToOCLSampler; | |||
9553 | return Compatible; | |||
9554 | } | |||
9555 | ||||
9556 | return Incompatible; | |||
9557 | } | |||
9558 | ||||
9559 | /// Constructs a transparent union from an expression that is | |||
9560 | /// used to initialize the transparent union. | |||
9561 | static void ConstructTransparentUnion(Sema &S, ASTContext &C, | |||
9562 | ExprResult &EResult, QualType UnionType, | |||
9563 | FieldDecl *Field) { | |||
9564 | // Build an initializer list that designates the appropriate member | |||
9565 | // of the transparent union. | |||
9566 | Expr *E = EResult.get(); | |||
9567 | InitListExpr *Initializer = new (C) InitListExpr(C, SourceLocation(), | |||
9568 | E, SourceLocation()); | |||
9569 | Initializer->setType(UnionType); | |||
9570 | Initializer->setInitializedFieldInUnion(Field); | |||
9571 | ||||
9572 | // Build a compound literal constructing a value of the transparent | |||
9573 | // union type from this initializer list. | |||
9574 | TypeSourceInfo *unionTInfo = C.getTrivialTypeSourceInfo(UnionType); | |||
9575 | EResult = new (C) CompoundLiteralExpr(SourceLocation(), unionTInfo, UnionType, | |||
9576 | VK_PRValue, Initializer, false); | |||
9577 | } | |||
9578 | ||||
9579 | Sema::AssignConvertType | |||
9580 | Sema::CheckTransparentUnionArgumentConstraints(QualType ArgType, | |||
9581 | ExprResult &RHS) { | |||
9582 | QualType RHSType = RHS.get()->getType(); | |||
9583 | ||||
9584 | // If the ArgType is a Union type, we want to handle a potential | |||
9585 | // transparent_union GCC extension. | |||
9586 | const RecordType *UT = ArgType->getAsUnionType(); | |||
9587 | if (!UT || !UT->getDecl()->hasAttr<TransparentUnionAttr>()) | |||
9588 | return Incompatible; | |||
9589 | ||||
9590 | // The field to initialize within the transparent union. | |||
9591 | RecordDecl *UD = UT->getDecl(); | |||
9592 | FieldDecl *InitField = nullptr; | |||
9593 | // It's compatible if the expression matches any of the fields. | |||
9594 | for (auto *it : UD->fields()) { | |||
9595 | if (it->getType()->isPointerType()) { | |||
9596 | // If the transparent union contains a pointer type, we allow: | |||
9597 | // 1) void pointer | |||
9598 | // 2) null pointer constant | |||
9599 | if (RHSType->isPointerType()) | |||
9600 | if (RHSType->castAs<PointerType>()->getPointeeType()->isVoidType()) { | |||
9601 | RHS = ImpCastExprToType(RHS.get(), it->getType(), CK_BitCast); | |||
9602 | InitField = it; | |||
9603 | break; | |||
9604 | } | |||
9605 | ||||
9606 | if (RHS.get()->isNullPointerConstant(Context, | |||
9607 | Expr::NPC_ValueDependentIsNull)) { | |||
9608 | RHS = ImpCastExprToType(RHS.get(), it->getType(), | |||
9609 | CK_NullToPointer); | |||
9610 | InitField = it; | |||
9611 | break; | |||
9612 | } | |||
9613 | } | |||
9614 | ||||
9615 | CastKind Kind; | |||
9616 | if (CheckAssignmentConstraints(it->getType(), RHS, Kind) | |||
9617 | == Compatible) { | |||
9618 | RHS = ImpCastExprToType(RHS.get(), it->getType(), Kind); | |||
9619 | InitField = it; | |||
9620 | break; | |||
9621 | } | |||
9622 | } | |||
9623 | ||||
9624 | if (!InitField) | |||
9625 | return Incompatible; | |||
9626 | ||||
9627 | ConstructTransparentUnion(*this, Context, RHS, ArgType, InitField); | |||
9628 | return Compatible; | |||
9629 | } | |||
9630 | ||||
9631 | Sema::AssignConvertType | |||
9632 | Sema::CheckSingleAssignmentConstraints(QualType LHSType, ExprResult &CallerRHS, | |||
9633 | bool Diagnose, | |||
9634 | bool DiagnoseCFAudited, | |||
9635 | bool ConvertRHS) { | |||
9636 | // We need to be able to tell the caller whether we diagnosed a problem, if | |||
9637 | // they ask us to issue diagnostics. | |||
9638 | assert((ConvertRHS || !Diagnose) && "can't indicate whether we diagnosed")(static_cast <bool> ((ConvertRHS || !Diagnose) && "can't indicate whether we diagnosed") ? void (0) : __assert_fail ("(ConvertRHS || !Diagnose) && \"can't indicate whether we diagnosed\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9638, __extension__ __PRETTY_FUNCTION__)); | |||
9639 | ||||
9640 | // If ConvertRHS is false, we want to leave the caller's RHS untouched. Sadly, | |||
9641 | // we can't avoid *all* modifications at the moment, so we need some somewhere | |||
9642 | // to put the updated value. | |||
9643 | ExprResult LocalRHS = CallerRHS; | |||
9644 | ExprResult &RHS = ConvertRHS ? CallerRHS : LocalRHS; | |||
9645 | ||||
9646 | if (const auto *LHSPtrType = LHSType->getAs<PointerType>()) { | |||
9647 | if (const auto *RHSPtrType = RHS.get()->getType()->getAs<PointerType>()) { | |||
9648 | if (RHSPtrType->getPointeeType()->hasAttr(attr::NoDeref) && | |||
9649 | !LHSPtrType->getPointeeType()->hasAttr(attr::NoDeref)) { | |||
9650 | Diag(RHS.get()->getExprLoc(), | |||
9651 | diag::warn_noderef_to_dereferenceable_pointer) | |||
9652 | << RHS.get()->getSourceRange(); | |||
9653 | } | |||
9654 | } | |||
9655 | } | |||
9656 | ||||
9657 | if (getLangOpts().CPlusPlus) { | |||
9658 | if (!LHSType->isRecordType() && !LHSType->isAtomicType()) { | |||
9659 | // C++ 5.17p3: If the left operand is not of class type, the | |||
9660 | // expression is implicitly converted (C++ 4) to the | |||
9661 | // cv-unqualified type of the left operand. | |||
9662 | QualType RHSType = RHS.get()->getType(); | |||
9663 | if (Diagnose) { | |||
9664 | RHS = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
9665 | AA_Assigning); | |||
9666 | } else { | |||
9667 | ImplicitConversionSequence ICS = | |||
9668 | TryImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
9669 | /*SuppressUserConversions=*/false, | |||
9670 | AllowedExplicit::None, | |||
9671 | /*InOverloadResolution=*/false, | |||
9672 | /*CStyle=*/false, | |||
9673 | /*AllowObjCWritebackConversion=*/false); | |||
9674 | if (ICS.isFailure()) | |||
9675 | return Incompatible; | |||
9676 | RHS = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
9677 | ICS, AA_Assigning); | |||
9678 | } | |||
9679 | if (RHS.isInvalid()) | |||
9680 | return Incompatible; | |||
9681 | Sema::AssignConvertType result = Compatible; | |||
9682 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
9683 | !CheckObjCARCUnavailableWeakConversion(LHSType, RHSType)) | |||
9684 | result = IncompatibleObjCWeakRef; | |||
9685 | return result; | |||
9686 | } | |||
9687 | ||||
9688 | // FIXME: Currently, we fall through and treat C++ classes like C | |||
9689 | // structures. | |||
9690 | // FIXME: We also fall through for atomics; not sure what should | |||
9691 | // happen there, though. | |||
9692 | } else if (RHS.get()->getType() == Context.OverloadTy) { | |||
9693 | // As a set of extensions to C, we support overloading on functions. These | |||
9694 | // functions need to be resolved here. | |||
9695 | DeclAccessPair DAP; | |||
9696 | if (FunctionDecl *FD = ResolveAddressOfOverloadedFunction( | |||
9697 | RHS.get(), LHSType, /*Complain=*/false, DAP)) | |||
9698 | RHS = FixOverloadedFunctionReference(RHS.get(), DAP, FD); | |||
9699 | else | |||
9700 | return Incompatible; | |||
9701 | } | |||
9702 | ||||
9703 | // C99 6.5.16.1p1: the left operand is a pointer and the right is | |||
9704 | // a null pointer constant. | |||
9705 | if ((LHSType->isPointerType() || LHSType->isObjCObjectPointerType() || | |||
9706 | LHSType->isBlockPointerType()) && | |||
9707 | RHS.get()->isNullPointerConstant(Context, | |||
9708 | Expr::NPC_ValueDependentIsNull)) { | |||
9709 | if (Diagnose || ConvertRHS) { | |||
9710 | CastKind Kind; | |||
9711 | CXXCastPath Path; | |||
9712 | CheckPointerConversion(RHS.get(), LHSType, Kind, Path, | |||
9713 | /*IgnoreBaseAccess=*/false, Diagnose); | |||
9714 | if (ConvertRHS) | |||
9715 | RHS = ImpCastExprToType(RHS.get(), LHSType, Kind, VK_PRValue, &Path); | |||
9716 | } | |||
9717 | return Compatible; | |||
9718 | } | |||
9719 | ||||
9720 | // OpenCL queue_t type assignment. | |||
9721 | if (LHSType->isQueueT() && RHS.get()->isNullPointerConstant( | |||
9722 | Context, Expr::NPC_ValueDependentIsNull)) { | |||
9723 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
9724 | return Compatible; | |||
9725 | } | |||
9726 | ||||
9727 | // This check seems unnatural, however it is necessary to ensure the proper | |||
9728 | // conversion of functions/arrays. If the conversion were done for all | |||
9729 | // DeclExpr's (created by ActOnIdExpression), it would mess up the unary | |||
9730 | // expressions that suppress this implicit conversion (&, sizeof). | |||
9731 | // | |||
9732 | // Suppress this for references: C++ 8.5.3p5. | |||
9733 | if (!LHSType->isReferenceType()) { | |||
9734 | // FIXME: We potentially allocate here even if ConvertRHS is false. | |||
9735 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get(), Diagnose); | |||
9736 | if (RHS.isInvalid()) | |||
9737 | return Incompatible; | |||
9738 | } | |||
9739 | CastKind Kind; | |||
9740 | Sema::AssignConvertType result = | |||
9741 | CheckAssignmentConstraints(LHSType, RHS, Kind, ConvertRHS); | |||
9742 | ||||
9743 | // C99 6.5.16.1p2: The value of the right operand is converted to the | |||
9744 | // type of the assignment expression. | |||
9745 | // CheckAssignmentConstraints allows the left-hand side to be a reference, | |||
9746 | // so that we can use references in built-in functions even in C. | |||
9747 | // The getNonReferenceType() call makes sure that the resulting expression | |||
9748 | // does not have reference type. | |||
9749 | if (result != Incompatible && RHS.get()->getType() != LHSType) { | |||
9750 | QualType Ty = LHSType.getNonLValueExprType(Context); | |||
9751 | Expr *E = RHS.get(); | |||
9752 | ||||
9753 | // Check for various Objective-C errors. If we are not reporting | |||
9754 | // diagnostics and just checking for errors, e.g., during overload | |||
9755 | // resolution, return Incompatible to indicate the failure. | |||
9756 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
9757 | CheckObjCConversion(SourceRange(), Ty, E, CCK_ImplicitConversion, | |||
9758 | Diagnose, DiagnoseCFAudited) != ACR_okay) { | |||
9759 | if (!Diagnose) | |||
9760 | return Incompatible; | |||
9761 | } | |||
9762 | if (getLangOpts().ObjC && | |||
9763 | (CheckObjCBridgeRelatedConversions(E->getBeginLoc(), LHSType, | |||
9764 | E->getType(), E, Diagnose) || | |||
9765 | CheckConversionToObjCLiteral(LHSType, E, Diagnose))) { | |||
9766 | if (!Diagnose) | |||
9767 | return Incompatible; | |||
9768 | // Replace the expression with a corrected version and continue so we | |||
9769 | // can find further errors. | |||
9770 | RHS = E; | |||
9771 | return Compatible; | |||
9772 | } | |||
9773 | ||||
9774 | if (ConvertRHS) | |||
9775 | RHS = ImpCastExprToType(E, Ty, Kind); | |||
9776 | } | |||
9777 | ||||
9778 | return result; | |||
9779 | } | |||
9780 | ||||
9781 | namespace { | |||
9782 | /// The original operand to an operator, prior to the application of the usual | |||
9783 | /// arithmetic conversions and converting the arguments of a builtin operator | |||
9784 | /// candidate. | |||
9785 | struct OriginalOperand { | |||
9786 | explicit OriginalOperand(Expr *Op) : Orig(Op), Conversion(nullptr) { | |||
9787 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(Op)) | |||
9788 | Op = MTE->getSubExpr(); | |||
9789 | if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(Op)) | |||
9790 | Op = BTE->getSubExpr(); | |||
9791 | if (auto *ICE = dyn_cast<ImplicitCastExpr>(Op)) { | |||
9792 | Orig = ICE->getSubExprAsWritten(); | |||
9793 | Conversion = ICE->getConversionFunction(); | |||
9794 | } | |||
9795 | } | |||
9796 | ||||
9797 | QualType getType() const { return Orig->getType(); } | |||
9798 | ||||
9799 | Expr *Orig; | |||
9800 | NamedDecl *Conversion; | |||
9801 | }; | |||
9802 | } | |||
9803 | ||||
9804 | QualType Sema::InvalidOperands(SourceLocation Loc, ExprResult &LHS, | |||
9805 | ExprResult &RHS) { | |||
9806 | OriginalOperand OrigLHS(LHS.get()), OrigRHS(RHS.get()); | |||
9807 | ||||
9808 | Diag(Loc, diag::err_typecheck_invalid_operands) | |||
9809 | << OrigLHS.getType() << OrigRHS.getType() | |||
9810 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
9811 | ||||
9812 | // If a user-defined conversion was applied to either of the operands prior | |||
9813 | // to applying the built-in operator rules, tell the user about it. | |||
9814 | if (OrigLHS.Conversion) { | |||
9815 | Diag(OrigLHS.Conversion->getLocation(), | |||
9816 | diag::note_typecheck_invalid_operands_converted) | |||
9817 | << 0 << LHS.get()->getType(); | |||
9818 | } | |||
9819 | if (OrigRHS.Conversion) { | |||
9820 | Diag(OrigRHS.Conversion->getLocation(), | |||
9821 | diag::note_typecheck_invalid_operands_converted) | |||
9822 | << 1 << RHS.get()->getType(); | |||
9823 | } | |||
9824 | ||||
9825 | return QualType(); | |||
9826 | } | |||
9827 | ||||
9828 | // Diagnose cases where a scalar was implicitly converted to a vector and | |||
9829 | // diagnose the underlying types. Otherwise, diagnose the error | |||
9830 | // as invalid vector logical operands for non-C++ cases. | |||
9831 | QualType Sema::InvalidLogicalVectorOperands(SourceLocation Loc, ExprResult &LHS, | |||
9832 | ExprResult &RHS) { | |||
9833 | QualType LHSType = LHS.get()->IgnoreImpCasts()->getType(); | |||
9834 | QualType RHSType = RHS.get()->IgnoreImpCasts()->getType(); | |||
9835 | ||||
9836 | bool LHSNatVec = LHSType->isVectorType(); | |||
9837 | bool RHSNatVec = RHSType->isVectorType(); | |||
9838 | ||||
9839 | if (!(LHSNatVec && RHSNatVec)) { | |||
9840 | Expr *Vector = LHSNatVec ? LHS.get() : RHS.get(); | |||
9841 | Expr *NonVector = !LHSNatVec ? LHS.get() : RHS.get(); | |||
9842 | Diag(Loc, diag::err_typecheck_logical_vector_expr_gnu_cpp_restrict) | |||
9843 | << 0 << Vector->getType() << NonVector->IgnoreImpCasts()->getType() | |||
9844 | << Vector->getSourceRange(); | |||
9845 | return QualType(); | |||
9846 | } | |||
9847 | ||||
9848 | Diag(Loc, diag::err_typecheck_logical_vector_expr_gnu_cpp_restrict) | |||
9849 | << 1 << LHSType << RHSType << LHS.get()->getSourceRange() | |||
9850 | << RHS.get()->getSourceRange(); | |||
9851 | ||||
9852 | return QualType(); | |||
9853 | } | |||
9854 | ||||
9855 | /// Try to convert a value of non-vector type to a vector type by converting | |||
9856 | /// the type to the element type of the vector and then performing a splat. | |||
9857 | /// If the language is OpenCL, we only use conversions that promote scalar | |||
9858 | /// rank; for C, Obj-C, and C++ we allow any real scalar conversion except | |||
9859 | /// for float->int. | |||
9860 | /// | |||
9861 | /// OpenCL V2.0 6.2.6.p2: | |||
9862 | /// An error shall occur if any scalar operand type has greater rank | |||
9863 | /// than the type of the vector element. | |||
9864 | /// | |||
9865 | /// \param scalar - if non-null, actually perform the conversions | |||
9866 | /// \return true if the operation fails (but without diagnosing the failure) | |||
9867 | static bool tryVectorConvertAndSplat(Sema &S, ExprResult *scalar, | |||
9868 | QualType scalarTy, | |||
9869 | QualType vectorEltTy, | |||
9870 | QualType vectorTy, | |||
9871 | unsigned &DiagID) { | |||
9872 | // The conversion to apply to the scalar before splatting it, | |||
9873 | // if necessary. | |||
9874 | CastKind scalarCast = CK_NoOp; | |||
9875 | ||||
9876 | if (vectorEltTy->isIntegralType(S.Context)) { | |||
9877 | if (S.getLangOpts().OpenCL && (scalarTy->isRealFloatingType() || | |||
9878 | (scalarTy->isIntegerType() && | |||
9879 | S.Context.getIntegerTypeOrder(vectorEltTy, scalarTy) < 0))) { | |||
9880 | DiagID = diag::err_opencl_scalar_type_rank_greater_than_vector_type; | |||
9881 | return true; | |||
9882 | } | |||
9883 | if (!scalarTy->isIntegralType(S.Context)) | |||
9884 | return true; | |||
9885 | scalarCast = CK_IntegralCast; | |||
9886 | } else if (vectorEltTy->isRealFloatingType()) { | |||
9887 | if (scalarTy->isRealFloatingType()) { | |||
9888 | if (S.getLangOpts().OpenCL && | |||
9889 | S.Context.getFloatingTypeOrder(vectorEltTy, scalarTy) < 0) { | |||
9890 | DiagID = diag::err_opencl_scalar_type_rank_greater_than_vector_type; | |||
9891 | return true; | |||
9892 | } | |||
9893 | scalarCast = CK_FloatingCast; | |||
9894 | } | |||
9895 | else if (scalarTy->isIntegralType(S.Context)) | |||
9896 | scalarCast = CK_IntegralToFloating; | |||
9897 | else | |||
9898 | return true; | |||
9899 | } else { | |||
9900 | return true; | |||
9901 | } | |||
9902 | ||||
9903 | // Adjust scalar if desired. | |||
9904 | if (scalar) { | |||
9905 | if (scalarCast != CK_NoOp) | |||
9906 | *scalar = S.ImpCastExprToType(scalar->get(), vectorEltTy, scalarCast); | |||
9907 | *scalar = S.ImpCastExprToType(scalar->get(), vectorTy, CK_VectorSplat); | |||
9908 | } | |||
9909 | return false; | |||
9910 | } | |||
9911 | ||||
9912 | /// Convert vector E to a vector with the same number of elements but different | |||
9913 | /// element type. | |||
9914 | static ExprResult convertVector(Expr *E, QualType ElementType, Sema &S) { | |||
9915 | const auto *VecTy = E->getType()->getAs<VectorType>(); | |||
9916 | assert(VecTy && "Expression E must be a vector")(static_cast <bool> (VecTy && "Expression E must be a vector" ) ? void (0) : __assert_fail ("VecTy && \"Expression E must be a vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 9916, __extension__ __PRETTY_FUNCTION__)); | |||
9917 | QualType NewVecTy = S.Context.getVectorType(ElementType, | |||
9918 | VecTy->getNumElements(), | |||
9919 | VecTy->getVectorKind()); | |||
9920 | ||||
9921 | // Look through the implicit cast. Return the subexpression if its type is | |||
9922 | // NewVecTy. | |||
9923 | if (auto *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
9924 | if (ICE->getSubExpr()->getType() == NewVecTy) | |||
9925 | return ICE->getSubExpr(); | |||
9926 | ||||
9927 | auto Cast = ElementType->isIntegerType() ? CK_IntegralCast : CK_FloatingCast; | |||
9928 | return S.ImpCastExprToType(E, NewVecTy, Cast); | |||
9929 | } | |||
9930 | ||||
9931 | /// Test if a (constant) integer Int can be casted to another integer type | |||
9932 | /// IntTy without losing precision. | |||
9933 | static bool canConvertIntToOtherIntTy(Sema &S, ExprResult *Int, | |||
9934 | QualType OtherIntTy) { | |||
9935 | QualType IntTy = Int->get()->getType().getUnqualifiedType(); | |||
9936 | ||||
9937 | // Reject cases where the value of the Int is unknown as that would | |||
9938 | // possibly cause truncation, but accept cases where the scalar can be | |||
9939 | // demoted without loss of precision. | |||
9940 | Expr::EvalResult EVResult; | |||
9941 | bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context); | |||
9942 | int Order = S.Context.getIntegerTypeOrder(OtherIntTy, IntTy); | |||
9943 | bool IntSigned = IntTy->hasSignedIntegerRepresentation(); | |||
9944 | bool OtherIntSigned = OtherIntTy->hasSignedIntegerRepresentation(); | |||
9945 | ||||
9946 | if (CstInt) { | |||
9947 | // If the scalar is constant and is of a higher order and has more active | |||
9948 | // bits that the vector element type, reject it. | |||
9949 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
9950 | unsigned NumBits = IntSigned | |||
9951 | ? (Result.isNegative() ? Result.getMinSignedBits() | |||
9952 | : Result.getActiveBits()) | |||
9953 | : Result.getActiveBits(); | |||
9954 | if (Order < 0 && S.Context.getIntWidth(OtherIntTy) < NumBits) | |||
9955 | return true; | |||
9956 | ||||
9957 | // If the signedness of the scalar type and the vector element type | |||
9958 | // differs and the number of bits is greater than that of the vector | |||
9959 | // element reject it. | |||
9960 | return (IntSigned != OtherIntSigned && | |||
9961 | NumBits > S.Context.getIntWidth(OtherIntTy)); | |||
9962 | } | |||
9963 | ||||
9964 | // Reject cases where the value of the scalar is not constant and it's | |||
9965 | // order is greater than that of the vector element type. | |||
9966 | return (Order < 0); | |||
9967 | } | |||
9968 | ||||
9969 | /// Test if a (constant) integer Int can be casted to floating point type | |||
9970 | /// FloatTy without losing precision. | |||
9971 | static bool canConvertIntTyToFloatTy(Sema &S, ExprResult *Int, | |||
9972 | QualType FloatTy) { | |||
9973 | QualType IntTy = Int->get()->getType().getUnqualifiedType(); | |||
9974 | ||||
9975 | // Determine if the integer constant can be expressed as a floating point | |||
9976 | // number of the appropriate type. | |||
9977 | Expr::EvalResult EVResult; | |||
9978 | bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context); | |||
9979 | ||||
9980 | uint64_t Bits = 0; | |||
9981 | if (CstInt) { | |||
9982 | // Reject constants that would be truncated if they were converted to | |||
9983 | // the floating point type. Test by simple to/from conversion. | |||
9984 | // FIXME: Ideally the conversion to an APFloat and from an APFloat | |||
9985 | // could be avoided if there was a convertFromAPInt method | |||
9986 | // which could signal back if implicit truncation occurred. | |||
9987 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
9988 | llvm::APFloat Float(S.Context.getFloatTypeSemantics(FloatTy)); | |||
9989 | Float.convertFromAPInt(Result, IntTy->hasSignedIntegerRepresentation(), | |||
9990 | llvm::APFloat::rmTowardZero); | |||
9991 | llvm::APSInt ConvertBack(S.Context.getIntWidth(IntTy), | |||
9992 | !IntTy->hasSignedIntegerRepresentation()); | |||
9993 | bool Ignored = false; | |||
9994 | Float.convertToInteger(ConvertBack, llvm::APFloat::rmNearestTiesToEven, | |||
9995 | &Ignored); | |||
9996 | if (Result != ConvertBack) | |||
9997 | return true; | |||
9998 | } else { | |||
9999 | // Reject types that cannot be fully encoded into the mantissa of | |||
10000 | // the float. | |||
10001 | Bits = S.Context.getTypeSize(IntTy); | |||
10002 | unsigned FloatPrec = llvm::APFloat::semanticsPrecision( | |||
10003 | S.Context.getFloatTypeSemantics(FloatTy)); | |||
10004 | if (Bits > FloatPrec) | |||
10005 | return true; | |||
10006 | } | |||
10007 | ||||
10008 | return false; | |||
10009 | } | |||
10010 | ||||
10011 | /// Attempt to convert and splat Scalar into a vector whose types matches | |||
10012 | /// Vector following GCC conversion rules. The rule is that implicit | |||
10013 | /// conversion can occur when Scalar can be casted to match Vector's element | |||
10014 | /// type without causing truncation of Scalar. | |||
10015 | static bool tryGCCVectorConvertAndSplat(Sema &S, ExprResult *Scalar, | |||
10016 | ExprResult *Vector) { | |||
10017 | QualType ScalarTy = Scalar->get()->getType().getUnqualifiedType(); | |||
10018 | QualType VectorTy = Vector->get()->getType().getUnqualifiedType(); | |||
10019 | const VectorType *VT = VectorTy->getAs<VectorType>(); | |||
10020 | ||||
10021 | assert(!isa<ExtVectorType>(VT) &&(static_cast <bool> (!isa<ExtVectorType>(VT) && "ExtVectorTypes should not be handled here!") ? void (0) : __assert_fail ("!isa<ExtVectorType>(VT) && \"ExtVectorTypes should not be handled here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10022, __extension__ __PRETTY_FUNCTION__)) | |||
10022 | "ExtVectorTypes should not be handled here!")(static_cast <bool> (!isa<ExtVectorType>(VT) && "ExtVectorTypes should not be handled here!") ? void (0) : __assert_fail ("!isa<ExtVectorType>(VT) && \"ExtVectorTypes should not be handled here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10022, __extension__ __PRETTY_FUNCTION__)); | |||
10023 | ||||
10024 | QualType VectorEltTy = VT->getElementType(); | |||
10025 | ||||
10026 | // Reject cases where the vector element type or the scalar element type are | |||
10027 | // not integral or floating point types. | |||
10028 | if (!VectorEltTy->isArithmeticType() || !ScalarTy->isArithmeticType()) | |||
10029 | return true; | |||
10030 | ||||
10031 | // The conversion to apply to the scalar before splatting it, | |||
10032 | // if necessary. | |||
10033 | CastKind ScalarCast = CK_NoOp; | |||
10034 | ||||
10035 | // Accept cases where the vector elements are integers and the scalar is | |||
10036 | // an integer. | |||
10037 | // FIXME: Notionally if the scalar was a floating point value with a precise | |||
10038 | // integral representation, we could cast it to an appropriate integer | |||
10039 | // type and then perform the rest of the checks here. GCC will perform | |||
10040 | // this conversion in some cases as determined by the input language. | |||
10041 | // We should accept it on a language independent basis. | |||
10042 | if (VectorEltTy->isIntegralType(S.Context) && | |||
10043 | ScalarTy->isIntegralType(S.Context) && | |||
10044 | S.Context.getIntegerTypeOrder(VectorEltTy, ScalarTy)) { | |||
10045 | ||||
10046 | if (canConvertIntToOtherIntTy(S, Scalar, VectorEltTy)) | |||
10047 | return true; | |||
10048 | ||||
10049 | ScalarCast = CK_IntegralCast; | |||
10050 | } else if (VectorEltTy->isIntegralType(S.Context) && | |||
10051 | ScalarTy->isRealFloatingType()) { | |||
10052 | if (S.Context.getTypeSize(VectorEltTy) == S.Context.getTypeSize(ScalarTy)) | |||
10053 | ScalarCast = CK_FloatingToIntegral; | |||
10054 | else | |||
10055 | return true; | |||
10056 | } else if (VectorEltTy->isRealFloatingType()) { | |||
10057 | if (ScalarTy->isRealFloatingType()) { | |||
10058 | ||||
10059 | // Reject cases where the scalar type is not a constant and has a higher | |||
10060 | // Order than the vector element type. | |||
10061 | llvm::APFloat Result(0.0); | |||
10062 | ||||
10063 | // Determine whether this is a constant scalar. In the event that the | |||
10064 | // value is dependent (and thus cannot be evaluated by the constant | |||
10065 | // evaluator), skip the evaluation. This will then diagnose once the | |||
10066 | // expression is instantiated. | |||
10067 | bool CstScalar = Scalar->get()->isValueDependent() || | |||
10068 | Scalar->get()->EvaluateAsFloat(Result, S.Context); | |||
10069 | int Order = S.Context.getFloatingTypeOrder(VectorEltTy, ScalarTy); | |||
10070 | if (!CstScalar && Order < 0) | |||
10071 | return true; | |||
10072 | ||||
10073 | // If the scalar cannot be safely casted to the vector element type, | |||
10074 | // reject it. | |||
10075 | if (CstScalar) { | |||
10076 | bool Truncated = false; | |||
10077 | Result.convert(S.Context.getFloatTypeSemantics(VectorEltTy), | |||
10078 | llvm::APFloat::rmNearestTiesToEven, &Truncated); | |||
10079 | if (Truncated) | |||
10080 | return true; | |||
10081 | } | |||
10082 | ||||
10083 | ScalarCast = CK_FloatingCast; | |||
10084 | } else if (ScalarTy->isIntegralType(S.Context)) { | |||
10085 | if (canConvertIntTyToFloatTy(S, Scalar, VectorEltTy)) | |||
10086 | return true; | |||
10087 | ||||
10088 | ScalarCast = CK_IntegralToFloating; | |||
10089 | } else | |||
10090 | return true; | |||
10091 | } else if (ScalarTy->isEnumeralType()) | |||
10092 | return true; | |||
10093 | ||||
10094 | // Adjust scalar if desired. | |||
10095 | if (Scalar) { | |||
10096 | if (ScalarCast != CK_NoOp) | |||
10097 | *Scalar = S.ImpCastExprToType(Scalar->get(), VectorEltTy, ScalarCast); | |||
10098 | *Scalar = S.ImpCastExprToType(Scalar->get(), VectorTy, CK_VectorSplat); | |||
10099 | } | |||
10100 | return false; | |||
10101 | } | |||
10102 | ||||
10103 | QualType Sema::CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, | |||
10104 | SourceLocation Loc, bool IsCompAssign, | |||
10105 | bool AllowBothBool, | |||
10106 | bool AllowBoolConversions) { | |||
10107 | if (!IsCompAssign) { | |||
10108 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
10109 | if (LHS.isInvalid()) | |||
10110 | return QualType(); | |||
10111 | } | |||
10112 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
10113 | if (RHS.isInvalid()) | |||
10114 | return QualType(); | |||
10115 | ||||
10116 | // For conversion purposes, we ignore any qualifiers. | |||
10117 | // For example, "const float" and "float" are equivalent. | |||
10118 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
10119 | QualType RHSType = RHS.get()->getType().getUnqualifiedType(); | |||
10120 | ||||
10121 | const VectorType *LHSVecType = LHSType->getAs<VectorType>(); | |||
10122 | const VectorType *RHSVecType = RHSType->getAs<VectorType>(); | |||
10123 | assert(LHSVecType || RHSVecType)(static_cast <bool> (LHSVecType || RHSVecType) ? void ( 0) : __assert_fail ("LHSVecType || RHSVecType", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10123, __extension__ __PRETTY_FUNCTION__)); | |||
10124 | ||||
10125 | if ((LHSVecType && LHSVecType->getElementType()->isBFloat16Type()) || | |||
10126 | (RHSVecType && RHSVecType->getElementType()->isBFloat16Type())) | |||
10127 | return InvalidOperands(Loc, LHS, RHS); | |||
10128 | ||||
10129 | // AltiVec-style "vector bool op vector bool" combinations are allowed | |||
10130 | // for some operators but not others. | |||
10131 | if (!AllowBothBool && | |||
10132 | LHSVecType && LHSVecType->getVectorKind() == VectorType::AltiVecBool && | |||
10133 | RHSVecType && RHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
10134 | return InvalidOperands(Loc, LHS, RHS); | |||
10135 | ||||
10136 | // If the vector types are identical, return. | |||
10137 | if (Context.hasSameType(LHSType, RHSType)) | |||
10138 | return LHSType; | |||
10139 | ||||
10140 | // If we have compatible AltiVec and GCC vector types, use the AltiVec type. | |||
10141 | if (LHSVecType && RHSVecType && | |||
10142 | Context.areCompatibleVectorTypes(LHSType, RHSType)) { | |||
10143 | if (isa<ExtVectorType>(LHSVecType)) { | |||
10144 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
10145 | return LHSType; | |||
10146 | } | |||
10147 | ||||
10148 | if (!IsCompAssign) | |||
10149 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
10150 | return RHSType; | |||
10151 | } | |||
10152 | ||||
10153 | // AllowBoolConversions says that bool and non-bool AltiVec vectors | |||
10154 | // can be mixed, with the result being the non-bool type. The non-bool | |||
10155 | // operand must have integer element type. | |||
10156 | if (AllowBoolConversions && LHSVecType && RHSVecType && | |||
10157 | LHSVecType->getNumElements() == RHSVecType->getNumElements() && | |||
10158 | (Context.getTypeSize(LHSVecType->getElementType()) == | |||
10159 | Context.getTypeSize(RHSVecType->getElementType()))) { | |||
10160 | if (LHSVecType->getVectorKind() == VectorType::AltiVecVector && | |||
10161 | LHSVecType->getElementType()->isIntegerType() && | |||
10162 | RHSVecType->getVectorKind() == VectorType::AltiVecBool) { | |||
10163 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
10164 | return LHSType; | |||
10165 | } | |||
10166 | if (!IsCompAssign && | |||
10167 | LHSVecType->getVectorKind() == VectorType::AltiVecBool && | |||
10168 | RHSVecType->getVectorKind() == VectorType::AltiVecVector && | |||
10169 | RHSVecType->getElementType()->isIntegerType()) { | |||
10170 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
10171 | return RHSType; | |||
10172 | } | |||
10173 | } | |||
10174 | ||||
10175 | // Expressions containing fixed-length and sizeless SVE vectors are invalid | |||
10176 | // since the ambiguity can affect the ABI. | |||
10177 | auto IsSveConversion = [](QualType FirstType, QualType SecondType) { | |||
10178 | const VectorType *VecType = SecondType->getAs<VectorType>(); | |||
10179 | return FirstType->isSizelessBuiltinType() && VecType && | |||
10180 | (VecType->getVectorKind() == VectorType::SveFixedLengthDataVector || | |||
10181 | VecType->getVectorKind() == | |||
10182 | VectorType::SveFixedLengthPredicateVector); | |||
10183 | }; | |||
10184 | ||||
10185 | if (IsSveConversion(LHSType, RHSType) || IsSveConversion(RHSType, LHSType)) { | |||
10186 | Diag(Loc, diag::err_typecheck_sve_ambiguous) << LHSType << RHSType; | |||
10187 | return QualType(); | |||
10188 | } | |||
10189 | ||||
10190 | // Expressions containing GNU and SVE (fixed or sizeless) vectors are invalid | |||
10191 | // since the ambiguity can affect the ABI. | |||
10192 | auto IsSveGnuConversion = [](QualType FirstType, QualType SecondType) { | |||
10193 | const VectorType *FirstVecType = FirstType->getAs<VectorType>(); | |||
10194 | const VectorType *SecondVecType = SecondType->getAs<VectorType>(); | |||
10195 | ||||
10196 | if (FirstVecType && SecondVecType) | |||
10197 | return FirstVecType->getVectorKind() == VectorType::GenericVector && | |||
10198 | (SecondVecType->getVectorKind() == | |||
10199 | VectorType::SveFixedLengthDataVector || | |||
10200 | SecondVecType->getVectorKind() == | |||
10201 | VectorType::SveFixedLengthPredicateVector); | |||
10202 | ||||
10203 | return FirstType->isSizelessBuiltinType() && SecondVecType && | |||
10204 | SecondVecType->getVectorKind() == VectorType::GenericVector; | |||
10205 | }; | |||
10206 | ||||
10207 | if (IsSveGnuConversion(LHSType, RHSType) || | |||
10208 | IsSveGnuConversion(RHSType, LHSType)) { | |||
10209 | Diag(Loc, diag::err_typecheck_sve_gnu_ambiguous) << LHSType << RHSType; | |||
10210 | return QualType(); | |||
10211 | } | |||
10212 | ||||
10213 | // If there's a vector type and a scalar, try to convert the scalar to | |||
10214 | // the vector element type and splat. | |||
10215 | unsigned DiagID = diag::err_typecheck_vector_not_convertable; | |||
10216 | if (!RHSVecType) { | |||
10217 | if (isa<ExtVectorType>(LHSVecType)) { | |||
10218 | if (!tryVectorConvertAndSplat(*this, &RHS, RHSType, | |||
10219 | LHSVecType->getElementType(), LHSType, | |||
10220 | DiagID)) | |||
10221 | return LHSType; | |||
10222 | } else { | |||
10223 | if (!tryGCCVectorConvertAndSplat(*this, &RHS, &LHS)) | |||
10224 | return LHSType; | |||
10225 | } | |||
10226 | } | |||
10227 | if (!LHSVecType) { | |||
10228 | if (isa<ExtVectorType>(RHSVecType)) { | |||
10229 | if (!tryVectorConvertAndSplat(*this, (IsCompAssign ? nullptr : &LHS), | |||
10230 | LHSType, RHSVecType->getElementType(), | |||
10231 | RHSType, DiagID)) | |||
10232 | return RHSType; | |||
10233 | } else { | |||
10234 | if (LHS.get()->isLValue() || | |||
10235 | !tryGCCVectorConvertAndSplat(*this, &LHS, &RHS)) | |||
10236 | return RHSType; | |||
10237 | } | |||
10238 | } | |||
10239 | ||||
10240 | // FIXME: The code below also handles conversion between vectors and | |||
10241 | // non-scalars, we should break this down into fine grained specific checks | |||
10242 | // and emit proper diagnostics. | |||
10243 | QualType VecType = LHSVecType ? LHSType : RHSType; | |||
10244 | const VectorType *VT = LHSVecType ? LHSVecType : RHSVecType; | |||
10245 | QualType OtherType = LHSVecType ? RHSType : LHSType; | |||
10246 | ExprResult *OtherExpr = LHSVecType ? &RHS : &LHS; | |||
10247 | if (isLaxVectorConversion(OtherType, VecType)) { | |||
10248 | // If we're allowing lax vector conversions, only the total (data) size | |||
10249 | // needs to be the same. For non compound assignment, if one of the types is | |||
10250 | // scalar, the result is always the vector type. | |||
10251 | if (!IsCompAssign) { | |||
10252 | *OtherExpr = ImpCastExprToType(OtherExpr->get(), VecType, CK_BitCast); | |||
10253 | return VecType; | |||
10254 | // In a compound assignment, lhs += rhs, 'lhs' is a lvalue src, forbidding | |||
10255 | // any implicit cast. Here, the 'rhs' should be implicit casted to 'lhs' | |||
10256 | // type. Note that this is already done by non-compound assignments in | |||
10257 | // CheckAssignmentConstraints. If it's a scalar type, only bitcast for | |||
10258 | // <1 x T> -> T. The result is also a vector type. | |||
10259 | } else if (OtherType->isExtVectorType() || OtherType->isVectorType() || | |||
10260 | (OtherType->isScalarType() && VT->getNumElements() == 1)) { | |||
10261 | ExprResult *RHSExpr = &RHS; | |||
10262 | *RHSExpr = ImpCastExprToType(RHSExpr->get(), LHSType, CK_BitCast); | |||
10263 | return VecType; | |||
10264 | } | |||
10265 | } | |||
10266 | ||||
10267 | // Okay, the expression is invalid. | |||
10268 | ||||
10269 | // If there's a non-vector, non-real operand, diagnose that. | |||
10270 | if ((!RHSVecType && !RHSType->isRealType()) || | |||
10271 | (!LHSVecType && !LHSType->isRealType())) { | |||
10272 | Diag(Loc, diag::err_typecheck_vector_not_convertable_non_scalar) | |||
10273 | << LHSType << RHSType | |||
10274 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10275 | return QualType(); | |||
10276 | } | |||
10277 | ||||
10278 | // OpenCL V1.1 6.2.6.p1: | |||
10279 | // If the operands are of more than one vector type, then an error shall | |||
10280 | // occur. Implicit conversions between vector types are not permitted, per | |||
10281 | // section 6.2.1. | |||
10282 | if (getLangOpts().OpenCL && | |||
10283 | RHSVecType && isa<ExtVectorType>(RHSVecType) && | |||
10284 | LHSVecType && isa<ExtVectorType>(LHSVecType)) { | |||
10285 | Diag(Loc, diag::err_opencl_implicit_vector_conversion) << LHSType | |||
10286 | << RHSType; | |||
10287 | return QualType(); | |||
10288 | } | |||
10289 | ||||
10290 | ||||
10291 | // If there is a vector type that is not a ExtVector and a scalar, we reach | |||
10292 | // this point if scalar could not be converted to the vector's element type | |||
10293 | // without truncation. | |||
10294 | if ((RHSVecType && !isa<ExtVectorType>(RHSVecType)) || | |||
10295 | (LHSVecType && !isa<ExtVectorType>(LHSVecType))) { | |||
10296 | QualType Scalar = LHSVecType ? RHSType : LHSType; | |||
10297 | QualType Vector = LHSVecType ? LHSType : RHSType; | |||
10298 | unsigned ScalarOrVector = LHSVecType && RHSVecType ? 1 : 0; | |||
10299 | Diag(Loc, | |||
10300 | diag::err_typecheck_vector_not_convertable_implict_truncation) | |||
10301 | << ScalarOrVector << Scalar << Vector; | |||
10302 | ||||
10303 | return QualType(); | |||
10304 | } | |||
10305 | ||||
10306 | // Otherwise, use the generic diagnostic. | |||
10307 | Diag(Loc, DiagID) | |||
10308 | << LHSType << RHSType | |||
10309 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10310 | return QualType(); | |||
10311 | } | |||
10312 | ||||
10313 | // checkArithmeticNull - Detect when a NULL constant is used improperly in an | |||
10314 | // expression. These are mainly cases where the null pointer is used as an | |||
10315 | // integer instead of a pointer. | |||
10316 | static void checkArithmeticNull(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
10317 | SourceLocation Loc, bool IsCompare) { | |||
10318 | // The canonical way to check for a GNU null is with isNullPointerConstant, | |||
10319 | // but we use a bit of a hack here for speed; this is a relatively | |||
10320 | // hot path, and isNullPointerConstant is slow. | |||
10321 | bool LHSNull = isa<GNUNullExpr>(LHS.get()->IgnoreParenImpCasts()); | |||
10322 | bool RHSNull = isa<GNUNullExpr>(RHS.get()->IgnoreParenImpCasts()); | |||
10323 | ||||
10324 | QualType NonNullType = LHSNull ? RHS.get()->getType() : LHS.get()->getType(); | |||
10325 | ||||
10326 | // Avoid analyzing cases where the result will either be invalid (and | |||
10327 | // diagnosed as such) or entirely valid and not something to warn about. | |||
10328 | if ((!LHSNull && !RHSNull) || NonNullType->isBlockPointerType() || | |||
10329 | NonNullType->isMemberPointerType() || NonNullType->isFunctionType()) | |||
10330 | return; | |||
10331 | ||||
10332 | // Comparison operations would not make sense with a null pointer no matter | |||
10333 | // what the other expression is. | |||
10334 | if (!IsCompare) { | |||
10335 | S.Diag(Loc, diag::warn_null_in_arithmetic_operation) | |||
10336 | << (LHSNull ? LHS.get()->getSourceRange() : SourceRange()) | |||
10337 | << (RHSNull ? RHS.get()->getSourceRange() : SourceRange()); | |||
10338 | return; | |||
10339 | } | |||
10340 | ||||
10341 | // The rest of the operations only make sense with a null pointer | |||
10342 | // if the other expression is a pointer. | |||
10343 | if (LHSNull == RHSNull || NonNullType->isAnyPointerType() || | |||
10344 | NonNullType->canDecayToPointerType()) | |||
10345 | return; | |||
10346 | ||||
10347 | S.Diag(Loc, diag::warn_null_in_comparison_operation) | |||
10348 | << LHSNull /* LHS is NULL */ << NonNullType | |||
10349 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10350 | } | |||
10351 | ||||
10352 | static void DiagnoseDivisionSizeofPointerOrArray(Sema &S, Expr *LHS, Expr *RHS, | |||
10353 | SourceLocation Loc) { | |||
10354 | const auto *LUE = dyn_cast<UnaryExprOrTypeTraitExpr>(LHS); | |||
10355 | const auto *RUE = dyn_cast<UnaryExprOrTypeTraitExpr>(RHS); | |||
10356 | if (!LUE || !RUE) | |||
10357 | return; | |||
10358 | if (LUE->getKind() != UETT_SizeOf || LUE->isArgumentType() || | |||
10359 | RUE->getKind() != UETT_SizeOf) | |||
10360 | return; | |||
10361 | ||||
10362 | const Expr *LHSArg = LUE->getArgumentExpr()->IgnoreParens(); | |||
10363 | QualType LHSTy = LHSArg->getType(); | |||
10364 | QualType RHSTy; | |||
10365 | ||||
10366 | if (RUE->isArgumentType()) | |||
10367 | RHSTy = RUE->getArgumentType().getNonReferenceType(); | |||
10368 | else | |||
10369 | RHSTy = RUE->getArgumentExpr()->IgnoreParens()->getType(); | |||
10370 | ||||
10371 | if (LHSTy->isPointerType() && !RHSTy->isPointerType()) { | |||
10372 | if (!S.Context.hasSameUnqualifiedType(LHSTy->getPointeeType(), RHSTy)) | |||
10373 | return; | |||
10374 | ||||
10375 | S.Diag(Loc, diag::warn_division_sizeof_ptr) << LHS << LHS->getSourceRange(); | |||
10376 | if (const auto *DRE = dyn_cast<DeclRefExpr>(LHSArg)) { | |||
10377 | if (const ValueDecl *LHSArgDecl = DRE->getDecl()) | |||
10378 | S.Diag(LHSArgDecl->getLocation(), diag::note_pointer_declared_here) | |||
10379 | << LHSArgDecl; | |||
10380 | } | |||
10381 | } else if (const auto *ArrayTy = S.Context.getAsArrayType(LHSTy)) { | |||
10382 | QualType ArrayElemTy = ArrayTy->getElementType(); | |||
10383 | if (ArrayElemTy != S.Context.getBaseElementType(ArrayTy) || | |||
10384 | ArrayElemTy->isDependentType() || RHSTy->isDependentType() || | |||
10385 | RHSTy->isReferenceType() || ArrayElemTy->isCharType() || | |||
10386 | S.Context.getTypeSize(ArrayElemTy) == S.Context.getTypeSize(RHSTy)) | |||
10387 | return; | |||
10388 | S.Diag(Loc, diag::warn_division_sizeof_array) | |||
10389 | << LHSArg->getSourceRange() << ArrayElemTy << RHSTy; | |||
10390 | if (const auto *DRE = dyn_cast<DeclRefExpr>(LHSArg)) { | |||
10391 | if (const ValueDecl *LHSArgDecl = DRE->getDecl()) | |||
10392 | S.Diag(LHSArgDecl->getLocation(), diag::note_array_declared_here) | |||
10393 | << LHSArgDecl; | |||
10394 | } | |||
10395 | ||||
10396 | S.Diag(Loc, diag::note_precedence_silence) << RHS; | |||
10397 | } | |||
10398 | } | |||
10399 | ||||
10400 | static void DiagnoseBadDivideOrRemainderValues(Sema& S, ExprResult &LHS, | |||
10401 | ExprResult &RHS, | |||
10402 | SourceLocation Loc, bool IsDiv) { | |||
10403 | // Check for division/remainder by zero. | |||
10404 | Expr::EvalResult RHSValue; | |||
10405 | if (!RHS.get()->isValueDependent() && | |||
10406 | RHS.get()->EvaluateAsInt(RHSValue, S.Context) && | |||
10407 | RHSValue.Val.getInt() == 0) | |||
10408 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
10409 | S.PDiag(diag::warn_remainder_division_by_zero) | |||
10410 | << IsDiv << RHS.get()->getSourceRange()); | |||
10411 | } | |||
10412 | ||||
10413 | QualType Sema::CheckMultiplyDivideOperands(ExprResult &LHS, ExprResult &RHS, | |||
10414 | SourceLocation Loc, | |||
10415 | bool IsCompAssign, bool IsDiv) { | |||
10416 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
10417 | ||||
10418 | QualType LHSTy = LHS.get()->getType(); | |||
10419 | QualType RHSTy = RHS.get()->getType(); | |||
10420 | if (LHSTy->isVectorType() || RHSTy->isVectorType()) | |||
10421 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
10422 | /*AllowBothBool*/getLangOpts().AltiVec, | |||
10423 | /*AllowBoolConversions*/false); | |||
10424 | if (!IsDiv && | |||
10425 | (LHSTy->isConstantMatrixType() || RHSTy->isConstantMatrixType())) | |||
10426 | return CheckMatrixMultiplyOperands(LHS, RHS, Loc, IsCompAssign); | |||
10427 | // For division, only matrix-by-scalar is supported. Other combinations with | |||
10428 | // matrix types are invalid. | |||
10429 | if (IsDiv && LHSTy->isConstantMatrixType() && RHSTy->isArithmeticType()) | |||
10430 | return CheckMatrixElementwiseOperands(LHS, RHS, Loc, IsCompAssign); | |||
10431 | ||||
10432 | QualType compType = UsualArithmeticConversions( | |||
10433 | LHS, RHS, Loc, IsCompAssign ? ACK_CompAssign : ACK_Arithmetic); | |||
10434 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
10435 | return QualType(); | |||
10436 | ||||
10437 | ||||
10438 | if (compType.isNull() || !compType->isArithmeticType()) | |||
10439 | return InvalidOperands(Loc, LHS, RHS); | |||
10440 | if (IsDiv) { | |||
10441 | DiagnoseBadDivideOrRemainderValues(*this, LHS, RHS, Loc, IsDiv); | |||
10442 | DiagnoseDivisionSizeofPointerOrArray(*this, LHS.get(), RHS.get(), Loc); | |||
10443 | } | |||
10444 | return compType; | |||
10445 | } | |||
10446 | ||||
10447 | QualType Sema::CheckRemainderOperands( | |||
10448 | ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign) { | |||
10449 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
10450 | ||||
10451 | if (LHS.get()->getType()->isVectorType() || | |||
10452 | RHS.get()->getType()->isVectorType()) { | |||
10453 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
10454 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
10455 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
10456 | /*AllowBothBool*/getLangOpts().AltiVec, | |||
10457 | /*AllowBoolConversions*/false); | |||
10458 | return InvalidOperands(Loc, LHS, RHS); | |||
10459 | } | |||
10460 | ||||
10461 | QualType compType = UsualArithmeticConversions( | |||
10462 | LHS, RHS, Loc, IsCompAssign ? ACK_CompAssign : ACK_Arithmetic); | |||
10463 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
10464 | return QualType(); | |||
10465 | ||||
10466 | if (compType.isNull() || !compType->isIntegerType()) | |||
10467 | return InvalidOperands(Loc, LHS, RHS); | |||
10468 | DiagnoseBadDivideOrRemainderValues(*this, LHS, RHS, Loc, false /* IsDiv */); | |||
10469 | return compType; | |||
10470 | } | |||
10471 | ||||
10472 | /// Diagnose invalid arithmetic on two void pointers. | |||
10473 | static void diagnoseArithmeticOnTwoVoidPointers(Sema &S, SourceLocation Loc, | |||
10474 | Expr *LHSExpr, Expr *RHSExpr) { | |||
10475 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
10476 | ? diag::err_typecheck_pointer_arith_void_type | |||
10477 | : diag::ext_gnu_void_ptr) | |||
10478 | << 1 /* two pointers */ << LHSExpr->getSourceRange() | |||
10479 | << RHSExpr->getSourceRange(); | |||
10480 | } | |||
10481 | ||||
10482 | /// Diagnose invalid arithmetic on a void pointer. | |||
10483 | static void diagnoseArithmeticOnVoidPointer(Sema &S, SourceLocation Loc, | |||
10484 | Expr *Pointer) { | |||
10485 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
10486 | ? diag::err_typecheck_pointer_arith_void_type | |||
10487 | : diag::ext_gnu_void_ptr) | |||
10488 | << 0 /* one pointer */ << Pointer->getSourceRange(); | |||
10489 | } | |||
10490 | ||||
10491 | /// Diagnose invalid arithmetic on a null pointer. | |||
10492 | /// | |||
10493 | /// If \p IsGNUIdiom is true, the operation is using the 'p = (i8*)nullptr + n' | |||
10494 | /// idiom, which we recognize as a GNU extension. | |||
10495 | /// | |||
10496 | static void diagnoseArithmeticOnNullPointer(Sema &S, SourceLocation Loc, | |||
10497 | Expr *Pointer, bool IsGNUIdiom) { | |||
10498 | if (IsGNUIdiom) | |||
10499 | S.Diag(Loc, diag::warn_gnu_null_ptr_arith) | |||
10500 | << Pointer->getSourceRange(); | |||
10501 | else | |||
10502 | S.Diag(Loc, diag::warn_pointer_arith_null_ptr) | |||
10503 | << S.getLangOpts().CPlusPlus << Pointer->getSourceRange(); | |||
10504 | } | |||
10505 | ||||
10506 | /// Diagnose invalid subraction on a null pointer. | |||
10507 | /// | |||
10508 | static void diagnoseSubtractionOnNullPointer(Sema &S, SourceLocation Loc, | |||
10509 | Expr *Pointer, bool BothNull) { | |||
10510 | // Null - null is valid in C++ [expr.add]p7 | |||
10511 | if (BothNull && S.getLangOpts().CPlusPlus) | |||
10512 | return; | |||
10513 | ||||
10514 | // Is this s a macro from a system header? | |||
10515 | if (S.Diags.getSuppressSystemWarnings() && S.SourceMgr.isInSystemMacro(Loc)) | |||
10516 | return; | |||
10517 | ||||
10518 | S.Diag(Loc, diag::warn_pointer_sub_null_ptr) | |||
10519 | << S.getLangOpts().CPlusPlus << Pointer->getSourceRange(); | |||
10520 | } | |||
10521 | ||||
10522 | /// Diagnose invalid arithmetic on two function pointers. | |||
10523 | static void diagnoseArithmeticOnTwoFunctionPointers(Sema &S, SourceLocation Loc, | |||
10524 | Expr *LHS, Expr *RHS) { | |||
10525 | assert(LHS->getType()->isAnyPointerType())(static_cast <bool> (LHS->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("LHS->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10525, __extension__ __PRETTY_FUNCTION__)); | |||
10526 | assert(RHS->getType()->isAnyPointerType())(static_cast <bool> (RHS->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("RHS->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10526, __extension__ __PRETTY_FUNCTION__)); | |||
10527 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
10528 | ? diag::err_typecheck_pointer_arith_function_type | |||
10529 | : diag::ext_gnu_ptr_func_arith) | |||
10530 | << 1 /* two pointers */ << LHS->getType()->getPointeeType() | |||
10531 | // We only show the second type if it differs from the first. | |||
10532 | << (unsigned)!S.Context.hasSameUnqualifiedType(LHS->getType(), | |||
10533 | RHS->getType()) | |||
10534 | << RHS->getType()->getPointeeType() | |||
10535 | << LHS->getSourceRange() << RHS->getSourceRange(); | |||
10536 | } | |||
10537 | ||||
10538 | /// Diagnose invalid arithmetic on a function pointer. | |||
10539 | static void diagnoseArithmeticOnFunctionPointer(Sema &S, SourceLocation Loc, | |||
10540 | Expr *Pointer) { | |||
10541 | assert(Pointer->getType()->isAnyPointerType())(static_cast <bool> (Pointer->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("Pointer->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10541, __extension__ __PRETTY_FUNCTION__)); | |||
10542 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
10543 | ? diag::err_typecheck_pointer_arith_function_type | |||
10544 | : diag::ext_gnu_ptr_func_arith) | |||
10545 | << 0 /* one pointer */ << Pointer->getType()->getPointeeType() | |||
10546 | << 0 /* one pointer, so only one type */ | |||
10547 | << Pointer->getSourceRange(); | |||
10548 | } | |||
10549 | ||||
10550 | /// Emit error if Operand is incomplete pointer type | |||
10551 | /// | |||
10552 | /// \returns True if pointer has incomplete type | |||
10553 | static bool checkArithmeticIncompletePointerType(Sema &S, SourceLocation Loc, | |||
10554 | Expr *Operand) { | |||
10555 | QualType ResType = Operand->getType(); | |||
10556 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
10557 | ResType = ResAtomicType->getValueType(); | |||
10558 | ||||
10559 | assert(ResType->isAnyPointerType() && !ResType->isDependentType())(static_cast <bool> (ResType->isAnyPointerType() && !ResType->isDependentType()) ? void (0) : __assert_fail ( "ResType->isAnyPointerType() && !ResType->isDependentType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10559, __extension__ __PRETTY_FUNCTION__)); | |||
10560 | QualType PointeeTy = ResType->getPointeeType(); | |||
10561 | return S.RequireCompleteSizedType( | |||
10562 | Loc, PointeeTy, | |||
10563 | diag::err_typecheck_arithmetic_incomplete_or_sizeless_type, | |||
10564 | Operand->getSourceRange()); | |||
10565 | } | |||
10566 | ||||
10567 | /// Check the validity of an arithmetic pointer operand. | |||
10568 | /// | |||
10569 | /// If the operand has pointer type, this code will check for pointer types | |||
10570 | /// which are invalid in arithmetic operations. These will be diagnosed | |||
10571 | /// appropriately, including whether or not the use is supported as an | |||
10572 | /// extension. | |||
10573 | /// | |||
10574 | /// \returns True when the operand is valid to use (even if as an extension). | |||
10575 | static bool checkArithmeticOpPointerOperand(Sema &S, SourceLocation Loc, | |||
10576 | Expr *Operand) { | |||
10577 | QualType ResType = Operand->getType(); | |||
10578 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
10579 | ResType = ResAtomicType->getValueType(); | |||
10580 | ||||
10581 | if (!ResType->isAnyPointerType()) return true; | |||
10582 | ||||
10583 | QualType PointeeTy = ResType->getPointeeType(); | |||
10584 | if (PointeeTy->isVoidType()) { | |||
10585 | diagnoseArithmeticOnVoidPointer(S, Loc, Operand); | |||
10586 | return !S.getLangOpts().CPlusPlus; | |||
10587 | } | |||
10588 | if (PointeeTy->isFunctionType()) { | |||
10589 | diagnoseArithmeticOnFunctionPointer(S, Loc, Operand); | |||
10590 | return !S.getLangOpts().CPlusPlus; | |||
10591 | } | |||
10592 | ||||
10593 | if (checkArithmeticIncompletePointerType(S, Loc, Operand)) return false; | |||
10594 | ||||
10595 | return true; | |||
10596 | } | |||
10597 | ||||
10598 | /// Check the validity of a binary arithmetic operation w.r.t. pointer | |||
10599 | /// operands. | |||
10600 | /// | |||
10601 | /// This routine will diagnose any invalid arithmetic on pointer operands much | |||
10602 | /// like \see checkArithmeticOpPointerOperand. However, it has special logic | |||
10603 | /// for emitting a single diagnostic even for operations where both LHS and RHS | |||
10604 | /// are (potentially problematic) pointers. | |||
10605 | /// | |||
10606 | /// \returns True when the operand is valid to use (even if as an extension). | |||
10607 | static bool checkArithmeticBinOpPointerOperands(Sema &S, SourceLocation Loc, | |||
10608 | Expr *LHSExpr, Expr *RHSExpr) { | |||
10609 | bool isLHSPointer = LHSExpr->getType()->isAnyPointerType(); | |||
10610 | bool isRHSPointer = RHSExpr->getType()->isAnyPointerType(); | |||
10611 | if (!isLHSPointer && !isRHSPointer) return true; | |||
10612 | ||||
10613 | QualType LHSPointeeTy, RHSPointeeTy; | |||
10614 | if (isLHSPointer) LHSPointeeTy = LHSExpr->getType()->getPointeeType(); | |||
10615 | if (isRHSPointer) RHSPointeeTy = RHSExpr->getType()->getPointeeType(); | |||
10616 | ||||
10617 | // if both are pointers check if operation is valid wrt address spaces | |||
10618 | if (isLHSPointer && isRHSPointer) { | |||
10619 | if (!LHSPointeeTy.isAddressSpaceOverlapping(RHSPointeeTy)) { | |||
10620 | S.Diag(Loc, | |||
10621 | diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
10622 | << LHSExpr->getType() << RHSExpr->getType() << 1 /*arithmetic op*/ | |||
10623 | << LHSExpr->getSourceRange() << RHSExpr->getSourceRange(); | |||
10624 | return false; | |||
10625 | } | |||
10626 | } | |||
10627 | ||||
10628 | // Check for arithmetic on pointers to incomplete types. | |||
10629 | bool isLHSVoidPtr = isLHSPointer && LHSPointeeTy->isVoidType(); | |||
10630 | bool isRHSVoidPtr = isRHSPointer && RHSPointeeTy->isVoidType(); | |||
10631 | if (isLHSVoidPtr || isRHSVoidPtr) { | |||
10632 | if (!isRHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, LHSExpr); | |||
10633 | else if (!isLHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, RHSExpr); | |||
10634 | else diagnoseArithmeticOnTwoVoidPointers(S, Loc, LHSExpr, RHSExpr); | |||
10635 | ||||
10636 | return !S.getLangOpts().CPlusPlus; | |||
10637 | } | |||
10638 | ||||
10639 | bool isLHSFuncPtr = isLHSPointer && LHSPointeeTy->isFunctionType(); | |||
10640 | bool isRHSFuncPtr = isRHSPointer && RHSPointeeTy->isFunctionType(); | |||
10641 | if (isLHSFuncPtr || isRHSFuncPtr) { | |||
10642 | if (!isRHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc, LHSExpr); | |||
10643 | else if (!isLHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc, | |||
10644 | RHSExpr); | |||
10645 | else diagnoseArithmeticOnTwoFunctionPointers(S, Loc, LHSExpr, RHSExpr); | |||
10646 | ||||
10647 | return !S.getLangOpts().CPlusPlus; | |||
10648 | } | |||
10649 | ||||
10650 | if (isLHSPointer && checkArithmeticIncompletePointerType(S, Loc, LHSExpr)) | |||
10651 | return false; | |||
10652 | if (isRHSPointer && checkArithmeticIncompletePointerType(S, Loc, RHSExpr)) | |||
10653 | return false; | |||
10654 | ||||
10655 | return true; | |||
10656 | } | |||
10657 | ||||
10658 | /// diagnoseStringPlusInt - Emit a warning when adding an integer to a string | |||
10659 | /// literal. | |||
10660 | static void diagnoseStringPlusInt(Sema &Self, SourceLocation OpLoc, | |||
10661 | Expr *LHSExpr, Expr *RHSExpr) { | |||
10662 | StringLiteral* StrExpr = dyn_cast<StringLiteral>(LHSExpr->IgnoreImpCasts()); | |||
10663 | Expr* IndexExpr = RHSExpr; | |||
10664 | if (!StrExpr) { | |||
10665 | StrExpr = dyn_cast<StringLiteral>(RHSExpr->IgnoreImpCasts()); | |||
10666 | IndexExpr = LHSExpr; | |||
10667 | } | |||
10668 | ||||
10669 | bool IsStringPlusInt = StrExpr && | |||
10670 | IndexExpr->getType()->isIntegralOrUnscopedEnumerationType(); | |||
10671 | if (!IsStringPlusInt || IndexExpr->isValueDependent()) | |||
10672 | return; | |||
10673 | ||||
10674 | SourceRange DiagRange(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
10675 | Self.Diag(OpLoc, diag::warn_string_plus_int) | |||
10676 | << DiagRange << IndexExpr->IgnoreImpCasts()->getType(); | |||
10677 | ||||
10678 | // Only print a fixit for "str" + int, not for int + "str". | |||
10679 | if (IndexExpr == RHSExpr) { | |||
10680 | SourceLocation EndLoc = Self.getLocForEndOfToken(RHSExpr->getEndLoc()); | |||
10681 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence) | |||
10682 | << FixItHint::CreateInsertion(LHSExpr->getBeginLoc(), "&") | |||
10683 | << FixItHint::CreateReplacement(SourceRange(OpLoc), "[") | |||
10684 | << FixItHint::CreateInsertion(EndLoc, "]"); | |||
10685 | } else | |||
10686 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence); | |||
10687 | } | |||
10688 | ||||
10689 | /// Emit a warning when adding a char literal to a string. | |||
10690 | static void diagnoseStringPlusChar(Sema &Self, SourceLocation OpLoc, | |||
10691 | Expr *LHSExpr, Expr *RHSExpr) { | |||
10692 | const Expr *StringRefExpr = LHSExpr; | |||
10693 | const CharacterLiteral *CharExpr = | |||
10694 | dyn_cast<CharacterLiteral>(RHSExpr->IgnoreImpCasts()); | |||
10695 | ||||
10696 | if (!CharExpr) { | |||
10697 | CharExpr = dyn_cast<CharacterLiteral>(LHSExpr->IgnoreImpCasts()); | |||
10698 | StringRefExpr = RHSExpr; | |||
10699 | } | |||
10700 | ||||
10701 | if (!CharExpr || !StringRefExpr) | |||
10702 | return; | |||
10703 | ||||
10704 | const QualType StringType = StringRefExpr->getType(); | |||
10705 | ||||
10706 | // Return if not a PointerType. | |||
10707 | if (!StringType->isAnyPointerType()) | |||
10708 | return; | |||
10709 | ||||
10710 | // Return if not a CharacterType. | |||
10711 | if (!StringType->getPointeeType()->isAnyCharacterType()) | |||
10712 | return; | |||
10713 | ||||
10714 | ASTContext &Ctx = Self.getASTContext(); | |||
10715 | SourceRange DiagRange(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
10716 | ||||
10717 | const QualType CharType = CharExpr->getType(); | |||
10718 | if (!CharType->isAnyCharacterType() && | |||
10719 | CharType->isIntegerType() && | |||
10720 | llvm::isUIntN(Ctx.getCharWidth(), CharExpr->getValue())) { | |||
10721 | Self.Diag(OpLoc, diag::warn_string_plus_char) | |||
10722 | << DiagRange << Ctx.CharTy; | |||
10723 | } else { | |||
10724 | Self.Diag(OpLoc, diag::warn_string_plus_char) | |||
10725 | << DiagRange << CharExpr->getType(); | |||
10726 | } | |||
10727 | ||||
10728 | // Only print a fixit for str + char, not for char + str. | |||
10729 | if (isa<CharacterLiteral>(RHSExpr->IgnoreImpCasts())) { | |||
10730 | SourceLocation EndLoc = Self.getLocForEndOfToken(RHSExpr->getEndLoc()); | |||
10731 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence) | |||
10732 | << FixItHint::CreateInsertion(LHSExpr->getBeginLoc(), "&") | |||
10733 | << FixItHint::CreateReplacement(SourceRange(OpLoc), "[") | |||
10734 | << FixItHint::CreateInsertion(EndLoc, "]"); | |||
10735 | } else { | |||
10736 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence); | |||
10737 | } | |||
10738 | } | |||
10739 | ||||
10740 | /// Emit error when two pointers are incompatible. | |||
10741 | static void diagnosePointerIncompatibility(Sema &S, SourceLocation Loc, | |||
10742 | Expr *LHSExpr, Expr *RHSExpr) { | |||
10743 | assert(LHSExpr->getType()->isAnyPointerType())(static_cast <bool> (LHSExpr->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("LHSExpr->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10743, __extension__ __PRETTY_FUNCTION__)); | |||
10744 | assert(RHSExpr->getType()->isAnyPointerType())(static_cast <bool> (RHSExpr->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("RHSExpr->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10744, __extension__ __PRETTY_FUNCTION__)); | |||
10745 | S.Diag(Loc, diag::err_typecheck_sub_ptr_compatible) | |||
10746 | << LHSExpr->getType() << RHSExpr->getType() << LHSExpr->getSourceRange() | |||
10747 | << RHSExpr->getSourceRange(); | |||
10748 | } | |||
10749 | ||||
10750 | // C99 6.5.6 | |||
10751 | QualType Sema::CheckAdditionOperands(ExprResult &LHS, ExprResult &RHS, | |||
10752 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
10753 | QualType* CompLHSTy) { | |||
10754 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
10755 | ||||
10756 | if (LHS.get()->getType()->isVectorType() || | |||
10757 | RHS.get()->getType()->isVectorType()) { | |||
10758 | QualType compType = CheckVectorOperands( | |||
10759 | LHS, RHS, Loc, CompLHSTy, | |||
10760 | /*AllowBothBool*/getLangOpts().AltiVec, | |||
10761 | /*AllowBoolConversions*/getLangOpts().ZVector); | |||
10762 | if (CompLHSTy) *CompLHSTy = compType; | |||
10763 | return compType; | |||
10764 | } | |||
10765 | ||||
10766 | if (LHS.get()->getType()->isConstantMatrixType() || | |||
10767 | RHS.get()->getType()->isConstantMatrixType()) { | |||
10768 | QualType compType = | |||
10769 | CheckMatrixElementwiseOperands(LHS, RHS, Loc, CompLHSTy); | |||
10770 | if (CompLHSTy) | |||
10771 | *CompLHSTy = compType; | |||
10772 | return compType; | |||
10773 | } | |||
10774 | ||||
10775 | QualType compType = UsualArithmeticConversions( | |||
10776 | LHS, RHS, Loc, CompLHSTy ? ACK_CompAssign : ACK_Arithmetic); | |||
10777 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
10778 | return QualType(); | |||
10779 | ||||
10780 | // Diagnose "string literal" '+' int and string '+' "char literal". | |||
10781 | if (Opc == BO_Add) { | |||
10782 | diagnoseStringPlusInt(*this, Loc, LHS.get(), RHS.get()); | |||
10783 | diagnoseStringPlusChar(*this, Loc, LHS.get(), RHS.get()); | |||
10784 | } | |||
10785 | ||||
10786 | // handle the common case first (both operands are arithmetic). | |||
10787 | if (!compType.isNull() && compType->isArithmeticType()) { | |||
10788 | if (CompLHSTy) *CompLHSTy = compType; | |||
10789 | return compType; | |||
10790 | } | |||
10791 | ||||
10792 | // Type-checking. Ultimately the pointer's going to be in PExp; | |||
10793 | // note that we bias towards the LHS being the pointer. | |||
10794 | Expr *PExp = LHS.get(), *IExp = RHS.get(); | |||
10795 | ||||
10796 | bool isObjCPointer; | |||
10797 | if (PExp->getType()->isPointerType()) { | |||
10798 | isObjCPointer = false; | |||
10799 | } else if (PExp->getType()->isObjCObjectPointerType()) { | |||
10800 | isObjCPointer = true; | |||
10801 | } else { | |||
10802 | std::swap(PExp, IExp); | |||
10803 | if (PExp->getType()->isPointerType()) { | |||
10804 | isObjCPointer = false; | |||
10805 | } else if (PExp->getType()->isObjCObjectPointerType()) { | |||
10806 | isObjCPointer = true; | |||
10807 | } else { | |||
10808 | return InvalidOperands(Loc, LHS, RHS); | |||
10809 | } | |||
10810 | } | |||
10811 | assert(PExp->getType()->isAnyPointerType())(static_cast <bool> (PExp->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("PExp->getType()->isAnyPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 10811, __extension__ __PRETTY_FUNCTION__)); | |||
10812 | ||||
10813 | if (!IExp->getType()->isIntegerType()) | |||
10814 | return InvalidOperands(Loc, LHS, RHS); | |||
10815 | ||||
10816 | // Adding to a null pointer results in undefined behavior. | |||
10817 | if (PExp->IgnoreParenCasts()->isNullPointerConstant( | |||
10818 | Context, Expr::NPC_ValueDependentIsNotNull)) { | |||
10819 | // In C++ adding zero to a null pointer is defined. | |||
10820 | Expr::EvalResult KnownVal; | |||
10821 | if (!getLangOpts().CPlusPlus || | |||
10822 | (!IExp->isValueDependent() && | |||
10823 | (!IExp->EvaluateAsInt(KnownVal, Context) || | |||
10824 | KnownVal.Val.getInt() != 0))) { | |||
10825 | // Check the conditions to see if this is the 'p = nullptr + n' idiom. | |||
10826 | bool IsGNUIdiom = BinaryOperator::isNullPointerArithmeticExtension( | |||
10827 | Context, BO_Add, PExp, IExp); | |||
10828 | diagnoseArithmeticOnNullPointer(*this, Loc, PExp, IsGNUIdiom); | |||
10829 | } | |||
10830 | } | |||
10831 | ||||
10832 | if (!checkArithmeticOpPointerOperand(*this, Loc, PExp)) | |||
10833 | return QualType(); | |||
10834 | ||||
10835 | if (isObjCPointer && checkArithmeticOnObjCPointer(*this, Loc, PExp)) | |||
10836 | return QualType(); | |||
10837 | ||||
10838 | // Check array bounds for pointer arithemtic | |||
10839 | CheckArrayAccess(PExp, IExp); | |||
10840 | ||||
10841 | if (CompLHSTy) { | |||
10842 | QualType LHSTy = Context.isPromotableBitField(LHS.get()); | |||
10843 | if (LHSTy.isNull()) { | |||
10844 | LHSTy = LHS.get()->getType(); | |||
10845 | if (LHSTy->isPromotableIntegerType()) | |||
10846 | LHSTy = Context.getPromotedIntegerType(LHSTy); | |||
10847 | } | |||
10848 | *CompLHSTy = LHSTy; | |||
10849 | } | |||
10850 | ||||
10851 | return PExp->getType(); | |||
10852 | } | |||
10853 | ||||
10854 | // C99 6.5.6 | |||
10855 | QualType Sema::CheckSubtractionOperands(ExprResult &LHS, ExprResult &RHS, | |||
10856 | SourceLocation Loc, | |||
10857 | QualType* CompLHSTy) { | |||
10858 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
10859 | ||||
10860 | if (LHS.get()->getType()->isVectorType() || | |||
10861 | RHS.get()->getType()->isVectorType()) { | |||
10862 | QualType compType = CheckVectorOperands( | |||
10863 | LHS, RHS, Loc, CompLHSTy, | |||
10864 | /*AllowBothBool*/getLangOpts().AltiVec, | |||
10865 | /*AllowBoolConversions*/getLangOpts().ZVector); | |||
10866 | if (CompLHSTy) *CompLHSTy = compType; | |||
10867 | return compType; | |||
10868 | } | |||
10869 | ||||
10870 | if (LHS.get()->getType()->isConstantMatrixType() || | |||
10871 | RHS.get()->getType()->isConstantMatrixType()) { | |||
10872 | QualType compType = | |||
10873 | CheckMatrixElementwiseOperands(LHS, RHS, Loc, CompLHSTy); | |||
10874 | if (CompLHSTy) | |||
10875 | *CompLHSTy = compType; | |||
10876 | return compType; | |||
10877 | } | |||
10878 | ||||
10879 | QualType compType = UsualArithmeticConversions( | |||
10880 | LHS, RHS, Loc, CompLHSTy ? ACK_CompAssign : ACK_Arithmetic); | |||
10881 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
10882 | return QualType(); | |||
10883 | ||||
10884 | // Enforce type constraints: C99 6.5.6p3. | |||
10885 | ||||
10886 | // Handle the common case first (both operands are arithmetic). | |||
10887 | if (!compType.isNull() && compType->isArithmeticType()) { | |||
10888 | if (CompLHSTy) *CompLHSTy = compType; | |||
10889 | return compType; | |||
10890 | } | |||
10891 | ||||
10892 | // Either ptr - int or ptr - ptr. | |||
10893 | if (LHS.get()->getType()->isAnyPointerType()) { | |||
10894 | QualType lpointee = LHS.get()->getType()->getPointeeType(); | |||
10895 | ||||
10896 | // Diagnose bad cases where we step over interface counts. | |||
10897 | if (LHS.get()->getType()->isObjCObjectPointerType() && | |||
10898 | checkArithmeticOnObjCPointer(*this, Loc, LHS.get())) | |||
10899 | return QualType(); | |||
10900 | ||||
10901 | // The result type of a pointer-int computation is the pointer type. | |||
10902 | if (RHS.get()->getType()->isIntegerType()) { | |||
10903 | // Subtracting from a null pointer should produce a warning. | |||
10904 | // The last argument to the diagnose call says this doesn't match the | |||
10905 | // GNU int-to-pointer idiom. | |||
10906 | if (LHS.get()->IgnoreParenCasts()->isNullPointerConstant(Context, | |||
10907 | Expr::NPC_ValueDependentIsNotNull)) { | |||
10908 | // In C++ adding zero to a null pointer is defined. | |||
10909 | Expr::EvalResult KnownVal; | |||
10910 | if (!getLangOpts().CPlusPlus || | |||
10911 | (!RHS.get()->isValueDependent() && | |||
10912 | (!RHS.get()->EvaluateAsInt(KnownVal, Context) || | |||
10913 | KnownVal.Val.getInt() != 0))) { | |||
10914 | diagnoseArithmeticOnNullPointer(*this, Loc, LHS.get(), false); | |||
10915 | } | |||
10916 | } | |||
10917 | ||||
10918 | if (!checkArithmeticOpPointerOperand(*this, Loc, LHS.get())) | |||
10919 | return QualType(); | |||
10920 | ||||
10921 | // Check array bounds for pointer arithemtic | |||
10922 | CheckArrayAccess(LHS.get(), RHS.get(), /*ArraySubscriptExpr*/nullptr, | |||
10923 | /*AllowOnePastEnd*/true, /*IndexNegated*/true); | |||
10924 | ||||
10925 | if (CompLHSTy) *CompLHSTy = LHS.get()->getType(); | |||
10926 | return LHS.get()->getType(); | |||
10927 | } | |||
10928 | ||||
10929 | // Handle pointer-pointer subtractions. | |||
10930 | if (const PointerType *RHSPTy | |||
10931 | = RHS.get()->getType()->getAs<PointerType>()) { | |||
10932 | QualType rpointee = RHSPTy->getPointeeType(); | |||
10933 | ||||
10934 | if (getLangOpts().CPlusPlus) { | |||
10935 | // Pointee types must be the same: C++ [expr.add] | |||
10936 | if (!Context.hasSameUnqualifiedType(lpointee, rpointee)) { | |||
10937 | diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get()); | |||
10938 | } | |||
10939 | } else { | |||
10940 | // Pointee types must be compatible C99 6.5.6p3 | |||
10941 | if (!Context.typesAreCompatible( | |||
10942 | Context.getCanonicalType(lpointee).getUnqualifiedType(), | |||
10943 | Context.getCanonicalType(rpointee).getUnqualifiedType())) { | |||
10944 | diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get()); | |||
10945 | return QualType(); | |||
10946 | } | |||
10947 | } | |||
10948 | ||||
10949 | if (!checkArithmeticBinOpPointerOperands(*this, Loc, | |||
10950 | LHS.get(), RHS.get())) | |||
10951 | return QualType(); | |||
10952 | ||||
10953 | bool LHSIsNullPtr = LHS.get()->IgnoreParenCasts()->isNullPointerConstant( | |||
10954 | Context, Expr::NPC_ValueDependentIsNotNull); | |||
10955 | bool RHSIsNullPtr = RHS.get()->IgnoreParenCasts()->isNullPointerConstant( | |||
10956 | Context, Expr::NPC_ValueDependentIsNotNull); | |||
10957 | ||||
10958 | // Subtracting nullptr or from nullptr is suspect | |||
10959 | if (LHSIsNullPtr) | |||
10960 | diagnoseSubtractionOnNullPointer(*this, Loc, LHS.get(), RHSIsNullPtr); | |||
10961 | if (RHSIsNullPtr) | |||
10962 | diagnoseSubtractionOnNullPointer(*this, Loc, RHS.get(), LHSIsNullPtr); | |||
10963 | ||||
10964 | // The pointee type may have zero size. As an extension, a structure or | |||
10965 | // union may have zero size or an array may have zero length. In this | |||
10966 | // case subtraction does not make sense. | |||
10967 | if (!rpointee->isVoidType() && !rpointee->isFunctionType()) { | |||
10968 | CharUnits ElementSize = Context.getTypeSizeInChars(rpointee); | |||
10969 | if (ElementSize.isZero()) { | |||
10970 | Diag(Loc,diag::warn_sub_ptr_zero_size_types) | |||
10971 | << rpointee.getUnqualifiedType() | |||
10972 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10973 | } | |||
10974 | } | |||
10975 | ||||
10976 | if (CompLHSTy) *CompLHSTy = LHS.get()->getType(); | |||
10977 | return Context.getPointerDiffType(); | |||
10978 | } | |||
10979 | } | |||
10980 | ||||
10981 | return InvalidOperands(Loc, LHS, RHS); | |||
10982 | } | |||
10983 | ||||
10984 | static bool isScopedEnumerationType(QualType T) { | |||
10985 | if (const EnumType *ET = T->getAs<EnumType>()) | |||
10986 | return ET->getDecl()->isScoped(); | |||
10987 | return false; | |||
10988 | } | |||
10989 | ||||
10990 | static void DiagnoseBadShiftValues(Sema& S, ExprResult &LHS, ExprResult &RHS, | |||
10991 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
10992 | QualType LHSType) { | |||
10993 | // OpenCL 6.3j: shift values are effectively % word size of LHS (more defined), | |||
10994 | // so skip remaining warnings as we don't want to modify values within Sema. | |||
10995 | if (S.getLangOpts().OpenCL) | |||
10996 | return; | |||
10997 | ||||
10998 | // Check right/shifter operand | |||
10999 | Expr::EvalResult RHSResult; | |||
11000 | if (RHS.get()->isValueDependent() || | |||
11001 | !RHS.get()->EvaluateAsInt(RHSResult, S.Context)) | |||
11002 | return; | |||
11003 | llvm::APSInt Right = RHSResult.Val.getInt(); | |||
11004 | ||||
11005 | if (Right.isNegative()) { | |||
11006 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
11007 | S.PDiag(diag::warn_shift_negative) | |||
11008 | << RHS.get()->getSourceRange()); | |||
11009 | return; | |||
11010 | } | |||
11011 | ||||
11012 | QualType LHSExprType = LHS.get()->getType(); | |||
11013 | uint64_t LeftSize = S.Context.getTypeSize(LHSExprType); | |||
11014 | if (LHSExprType->isExtIntType()) | |||
11015 | LeftSize = S.Context.getIntWidth(LHSExprType); | |||
11016 | else if (LHSExprType->isFixedPointType()) { | |||
11017 | auto FXSema = S.Context.getFixedPointSemantics(LHSExprType); | |||
11018 | LeftSize = FXSema.getWidth() - (unsigned)FXSema.hasUnsignedPadding(); | |||
11019 | } | |||
11020 | llvm::APInt LeftBits(Right.getBitWidth(), LeftSize); | |||
11021 | if (Right.uge(LeftBits)) { | |||
11022 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
11023 | S.PDiag(diag::warn_shift_gt_typewidth) | |||
11024 | << RHS.get()->getSourceRange()); | |||
11025 | return; | |||
11026 | } | |||
11027 | ||||
11028 | // FIXME: We probably need to handle fixed point types specially here. | |||
11029 | if (Opc != BO_Shl || LHSExprType->isFixedPointType()) | |||
11030 | return; | |||
11031 | ||||
11032 | // When left shifting an ICE which is signed, we can check for overflow which | |||
11033 | // according to C++ standards prior to C++2a has undefined behavior | |||
11034 | // ([expr.shift] 5.8/2). Unsigned integers have defined behavior modulo one | |||
11035 | // more than the maximum value representable in the result type, so never | |||
11036 | // warn for those. (FIXME: Unsigned left-shift overflow in a constant | |||
11037 | // expression is still probably a bug.) | |||
11038 | Expr::EvalResult LHSResult; | |||
11039 | if (LHS.get()->isValueDependent() || | |||
11040 | LHSType->hasUnsignedIntegerRepresentation() || | |||
11041 | !LHS.get()->EvaluateAsInt(LHSResult, S.Context)) | |||
11042 | return; | |||
11043 | llvm::APSInt Left = LHSResult.Val.getInt(); | |||
11044 | ||||
11045 | // If LHS does not have a signed type and non-negative value | |||
11046 | // then, the behavior is undefined before C++2a. Warn about it. | |||
11047 | if (Left.isNegative() && !S.getLangOpts().isSignedOverflowDefined() && | |||
11048 | !S.getLangOpts().CPlusPlus20) { | |||
11049 | S.DiagRuntimeBehavior(Loc, LHS.get(), | |||
11050 | S.PDiag(diag::warn_shift_lhs_negative) | |||
11051 | << LHS.get()->getSourceRange()); | |||
11052 | return; | |||
11053 | } | |||
11054 | ||||
11055 | llvm::APInt ResultBits = | |||
11056 | static_cast<llvm::APInt&>(Right) + Left.getMinSignedBits(); | |||
11057 | if (LeftBits.uge(ResultBits)) | |||
11058 | return; | |||
11059 | llvm::APSInt Result = Left.extend(ResultBits.getLimitedValue()); | |||
11060 | Result = Result.shl(Right); | |||
11061 | ||||
11062 | // Print the bit representation of the signed integer as an unsigned | |||
11063 | // hexadecimal number. | |||
11064 | SmallString<40> HexResult; | |||
11065 | Result.toString(HexResult, 16, /*Signed =*/false, /*Literal =*/true); | |||
11066 | ||||
11067 | // If we are only missing a sign bit, this is less likely to result in actual | |||
11068 | // bugs -- if the result is cast back to an unsigned type, it will have the | |||
11069 | // expected value. Thus we place this behind a different warning that can be | |||
11070 | // turned off separately if needed. | |||
11071 | if (LeftBits == ResultBits - 1) { | |||
11072 | S.Diag(Loc, diag::warn_shift_result_sets_sign_bit) | |||
11073 | << HexResult << LHSType | |||
11074 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11075 | return; | |||
11076 | } | |||
11077 | ||||
11078 | S.Diag(Loc, diag::warn_shift_result_gt_typewidth) | |||
11079 | << HexResult.str() << Result.getMinSignedBits() << LHSType | |||
11080 | << Left.getBitWidth() << LHS.get()->getSourceRange() | |||
11081 | << RHS.get()->getSourceRange(); | |||
11082 | } | |||
11083 | ||||
11084 | /// Return the resulting type when a vector is shifted | |||
11085 | /// by a scalar or vector shift amount. | |||
11086 | static QualType checkVectorShift(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
11087 | SourceLocation Loc, bool IsCompAssign) { | |||
11088 | // OpenCL v1.1 s6.3.j says RHS can be a vector only if LHS is a vector. | |||
11089 | if ((S.LangOpts.OpenCL || S.LangOpts.ZVector) && | |||
11090 | !LHS.get()->getType()->isVectorType()) { | |||
11091 | S.Diag(Loc, diag::err_shift_rhs_only_vector) | |||
11092 | << RHS.get()->getType() << LHS.get()->getType() | |||
11093 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11094 | return QualType(); | |||
11095 | } | |||
11096 | ||||
11097 | if (!IsCompAssign) { | |||
11098 | LHS = S.UsualUnaryConversions(LHS.get()); | |||
11099 | if (LHS.isInvalid()) return QualType(); | |||
11100 | } | |||
11101 | ||||
11102 | RHS = S.UsualUnaryConversions(RHS.get()); | |||
11103 | if (RHS.isInvalid()) return QualType(); | |||
11104 | ||||
11105 | QualType LHSType = LHS.get()->getType(); | |||
11106 | // Note that LHS might be a scalar because the routine calls not only in | |||
11107 | // OpenCL case. | |||
11108 | const VectorType *LHSVecTy = LHSType->getAs<VectorType>(); | |||
11109 | QualType LHSEleType = LHSVecTy ? LHSVecTy->getElementType() : LHSType; | |||
11110 | ||||
11111 | // Note that RHS might not be a vector. | |||
11112 | QualType RHSType = RHS.get()->getType(); | |||
11113 | const VectorType *RHSVecTy = RHSType->getAs<VectorType>(); | |||
11114 | QualType RHSEleType = RHSVecTy ? RHSVecTy->getElementType() : RHSType; | |||
11115 | ||||
11116 | // The operands need to be integers. | |||
11117 | if (!LHSEleType->isIntegerType()) { | |||
11118 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
11119 | << LHS.get()->getType() << LHS.get()->getSourceRange(); | |||
11120 | return QualType(); | |||
11121 | } | |||
11122 | ||||
11123 | if (!RHSEleType->isIntegerType()) { | |||
11124 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
11125 | << RHS.get()->getType() << RHS.get()->getSourceRange(); | |||
11126 | return QualType(); | |||
11127 | } | |||
11128 | ||||
11129 | if (!LHSVecTy) { | |||
11130 | assert(RHSVecTy)(static_cast <bool> (RHSVecTy) ? void (0) : __assert_fail ("RHSVecTy", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11130, __extension__ __PRETTY_FUNCTION__)); | |||
11131 | if (IsCompAssign) | |||
11132 | return RHSType; | |||
11133 | if (LHSEleType != RHSEleType) { | |||
11134 | LHS = S.ImpCastExprToType(LHS.get(),RHSEleType, CK_IntegralCast); | |||
11135 | LHSEleType = RHSEleType; | |||
11136 | } | |||
11137 | QualType VecTy = | |||
11138 | S.Context.getExtVectorType(LHSEleType, RHSVecTy->getNumElements()); | |||
11139 | LHS = S.ImpCastExprToType(LHS.get(), VecTy, CK_VectorSplat); | |||
11140 | LHSType = VecTy; | |||
11141 | } else if (RHSVecTy) { | |||
11142 | // OpenCL v1.1 s6.3.j says that for vector types, the operators | |||
11143 | // are applied component-wise. So if RHS is a vector, then ensure | |||
11144 | // that the number of elements is the same as LHS... | |||
11145 | if (RHSVecTy->getNumElements() != LHSVecTy->getNumElements()) { | |||
11146 | S.Diag(Loc, diag::err_typecheck_vector_lengths_not_equal) | |||
11147 | << LHS.get()->getType() << RHS.get()->getType() | |||
11148 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11149 | return QualType(); | |||
11150 | } | |||
11151 | if (!S.LangOpts.OpenCL && !S.LangOpts.ZVector) { | |||
11152 | const BuiltinType *LHSBT = LHSEleType->getAs<clang::BuiltinType>(); | |||
11153 | const BuiltinType *RHSBT = RHSEleType->getAs<clang::BuiltinType>(); | |||
11154 | if (LHSBT != RHSBT && | |||
11155 | S.Context.getTypeSize(LHSBT) != S.Context.getTypeSize(RHSBT)) { | |||
11156 | S.Diag(Loc, diag::warn_typecheck_vector_element_sizes_not_equal) | |||
11157 | << LHS.get()->getType() << RHS.get()->getType() | |||
11158 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11159 | } | |||
11160 | } | |||
11161 | } else { | |||
11162 | // ...else expand RHS to match the number of elements in LHS. | |||
11163 | QualType VecTy = | |||
11164 | S.Context.getExtVectorType(RHSEleType, LHSVecTy->getNumElements()); | |||
11165 | RHS = S.ImpCastExprToType(RHS.get(), VecTy, CK_VectorSplat); | |||
11166 | } | |||
11167 | ||||
11168 | return LHSType; | |||
11169 | } | |||
11170 | ||||
11171 | // C99 6.5.7 | |||
11172 | QualType Sema::CheckShiftOperands(ExprResult &LHS, ExprResult &RHS, | |||
11173 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
11174 | bool IsCompAssign) { | |||
11175 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
11176 | ||||
11177 | // Vector shifts promote their scalar inputs to vector type. | |||
11178 | if (LHS.get()->getType()->isVectorType() || | |||
11179 | RHS.get()->getType()->isVectorType()) { | |||
11180 | if (LangOpts.ZVector) { | |||
11181 | // The shift operators for the z vector extensions work basically | |||
11182 | // like general shifts, except that neither the LHS nor the RHS is | |||
11183 | // allowed to be a "vector bool". | |||
11184 | if (auto LHSVecType = LHS.get()->getType()->getAs<VectorType>()) | |||
11185 | if (LHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
11186 | return InvalidOperands(Loc, LHS, RHS); | |||
11187 | if (auto RHSVecType = RHS.get()->getType()->getAs<VectorType>()) | |||
11188 | if (RHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
11189 | return InvalidOperands(Loc, LHS, RHS); | |||
11190 | } | |||
11191 | return checkVectorShift(*this, LHS, RHS, Loc, IsCompAssign); | |||
11192 | } | |||
11193 | ||||
11194 | // Shifts don't perform usual arithmetic conversions, they just do integer | |||
11195 | // promotions on each operand. C99 6.5.7p3 | |||
11196 | ||||
11197 | // For the LHS, do usual unary conversions, but then reset them away | |||
11198 | // if this is a compound assignment. | |||
11199 | ExprResult OldLHS = LHS; | |||
11200 | LHS = UsualUnaryConversions(LHS.get()); | |||
11201 | if (LHS.isInvalid()) | |||
11202 | return QualType(); | |||
11203 | QualType LHSType = LHS.get()->getType(); | |||
11204 | if (IsCompAssign) LHS = OldLHS; | |||
11205 | ||||
11206 | // The RHS is simpler. | |||
11207 | RHS = UsualUnaryConversions(RHS.get()); | |||
11208 | if (RHS.isInvalid()) | |||
11209 | return QualType(); | |||
11210 | QualType RHSType = RHS.get()->getType(); | |||
11211 | ||||
11212 | // C99 6.5.7p2: Each of the operands shall have integer type. | |||
11213 | // Embedded-C 4.1.6.2.2: The LHS may also be fixed-point. | |||
11214 | if ((!LHSType->isFixedPointOrIntegerType() && | |||
11215 | !LHSType->hasIntegerRepresentation()) || | |||
11216 | !RHSType->hasIntegerRepresentation()) | |||
11217 | return InvalidOperands(Loc, LHS, RHS); | |||
11218 | ||||
11219 | // C++0x: Don't allow scoped enums. FIXME: Use something better than | |||
11220 | // hasIntegerRepresentation() above instead of this. | |||
11221 | if (isScopedEnumerationType(LHSType) || | |||
11222 | isScopedEnumerationType(RHSType)) { | |||
11223 | return InvalidOperands(Loc, LHS, RHS); | |||
11224 | } | |||
11225 | // Sanity-check shift operands | |||
11226 | DiagnoseBadShiftValues(*this, LHS, RHS, Loc, Opc, LHSType); | |||
11227 | ||||
11228 | // "The type of the result is that of the promoted left operand." | |||
11229 | return LHSType; | |||
11230 | } | |||
11231 | ||||
11232 | /// Diagnose bad pointer comparisons. | |||
11233 | static void diagnoseDistinctPointerComparison(Sema &S, SourceLocation Loc, | |||
11234 | ExprResult &LHS, ExprResult &RHS, | |||
11235 | bool IsError) { | |||
11236 | S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_distinct_pointers | |||
11237 | : diag::ext_typecheck_comparison_of_distinct_pointers) | |||
11238 | << LHS.get()->getType() << RHS.get()->getType() | |||
11239 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11240 | } | |||
11241 | ||||
11242 | /// Returns false if the pointers are converted to a composite type, | |||
11243 | /// true otherwise. | |||
11244 | static bool convertPointersToCompositeType(Sema &S, SourceLocation Loc, | |||
11245 | ExprResult &LHS, ExprResult &RHS) { | |||
11246 | // C++ [expr.rel]p2: | |||
11247 | // [...] Pointer conversions (4.10) and qualification | |||
11248 | // conversions (4.4) are performed on pointer operands (or on | |||
11249 | // a pointer operand and a null pointer constant) to bring | |||
11250 | // them to their composite pointer type. [...] | |||
11251 | // | |||
11252 | // C++ [expr.eq]p1 uses the same notion for (in)equality | |||
11253 | // comparisons of pointers. | |||
11254 | ||||
11255 | QualType LHSType = LHS.get()->getType(); | |||
11256 | QualType RHSType = RHS.get()->getType(); | |||
11257 | assert(LHSType->isPointerType() || RHSType->isPointerType() ||(static_cast <bool> (LHSType->isPointerType() || RHSType ->isPointerType() || LHSType->isMemberPointerType() || RHSType ->isMemberPointerType()) ? void (0) : __assert_fail ("LHSType->isPointerType() || RHSType->isPointerType() || LHSType->isMemberPointerType() || RHSType->isMemberPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11258, __extension__ __PRETTY_FUNCTION__)) | |||
11258 | LHSType->isMemberPointerType() || RHSType->isMemberPointerType())(static_cast <bool> (LHSType->isPointerType() || RHSType ->isPointerType() || LHSType->isMemberPointerType() || RHSType ->isMemberPointerType()) ? void (0) : __assert_fail ("LHSType->isPointerType() || RHSType->isPointerType() || LHSType->isMemberPointerType() || RHSType->isMemberPointerType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11258, __extension__ __PRETTY_FUNCTION__)); | |||
11259 | ||||
11260 | QualType T = S.FindCompositePointerType(Loc, LHS, RHS); | |||
11261 | if (T.isNull()) { | |||
11262 | if ((LHSType->isAnyPointerType() || LHSType->isMemberPointerType()) && | |||
11263 | (RHSType->isAnyPointerType() || RHSType->isMemberPointerType())) | |||
11264 | diagnoseDistinctPointerComparison(S, Loc, LHS, RHS, /*isError*/true); | |||
11265 | else | |||
11266 | S.InvalidOperands(Loc, LHS, RHS); | |||
11267 | return true; | |||
11268 | } | |||
11269 | ||||
11270 | return false; | |||
11271 | } | |||
11272 | ||||
11273 | static void diagnoseFunctionPointerToVoidComparison(Sema &S, SourceLocation Loc, | |||
11274 | ExprResult &LHS, | |||
11275 | ExprResult &RHS, | |||
11276 | bool IsError) { | |||
11277 | S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_fptr_to_void | |||
11278 | : diag::ext_typecheck_comparison_of_fptr_to_void) | |||
11279 | << LHS.get()->getType() << RHS.get()->getType() | |||
11280 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11281 | } | |||
11282 | ||||
11283 | static bool isObjCObjectLiteral(ExprResult &E) { | |||
11284 | switch (E.get()->IgnoreParenImpCasts()->getStmtClass()) { | |||
11285 | case Stmt::ObjCArrayLiteralClass: | |||
11286 | case Stmt::ObjCDictionaryLiteralClass: | |||
11287 | case Stmt::ObjCStringLiteralClass: | |||
11288 | case Stmt::ObjCBoxedExprClass: | |||
11289 | return true; | |||
11290 | default: | |||
11291 | // Note that ObjCBoolLiteral is NOT an object literal! | |||
11292 | return false; | |||
11293 | } | |||
11294 | } | |||
11295 | ||||
11296 | static bool hasIsEqualMethod(Sema &S, const Expr *LHS, const Expr *RHS) { | |||
11297 | const ObjCObjectPointerType *Type = | |||
11298 | LHS->getType()->getAs<ObjCObjectPointerType>(); | |||
11299 | ||||
11300 | // If this is not actually an Objective-C object, bail out. | |||
11301 | if (!Type) | |||
11302 | return false; | |||
11303 | ||||
11304 | // Get the LHS object's interface type. | |||
11305 | QualType InterfaceType = Type->getPointeeType(); | |||
11306 | ||||
11307 | // If the RHS isn't an Objective-C object, bail out. | |||
11308 | if (!RHS->getType()->isObjCObjectPointerType()) | |||
11309 | return false; | |||
11310 | ||||
11311 | // Try to find the -isEqual: method. | |||
11312 | Selector IsEqualSel = S.NSAPIObj->getIsEqualSelector(); | |||
11313 | ObjCMethodDecl *Method = S.LookupMethodInObjectType(IsEqualSel, | |||
11314 | InterfaceType, | |||
11315 | /*IsInstance=*/true); | |||
11316 | if (!Method) { | |||
11317 | if (Type->isObjCIdType()) { | |||
11318 | // For 'id', just check the global pool. | |||
11319 | Method = S.LookupInstanceMethodInGlobalPool(IsEqualSel, SourceRange(), | |||
11320 | /*receiverId=*/true); | |||
11321 | } else { | |||
11322 | // Check protocols. | |||
11323 | Method = S.LookupMethodInQualifiedType(IsEqualSel, Type, | |||
11324 | /*IsInstance=*/true); | |||
11325 | } | |||
11326 | } | |||
11327 | ||||
11328 | if (!Method) | |||
11329 | return false; | |||
11330 | ||||
11331 | QualType T = Method->parameters()[0]->getType(); | |||
11332 | if (!T->isObjCObjectPointerType()) | |||
11333 | return false; | |||
11334 | ||||
11335 | QualType R = Method->getReturnType(); | |||
11336 | if (!R->isScalarType()) | |||
11337 | return false; | |||
11338 | ||||
11339 | return true; | |||
11340 | } | |||
11341 | ||||
11342 | Sema::ObjCLiteralKind Sema::CheckLiteralKind(Expr *FromE) { | |||
11343 | FromE = FromE->IgnoreParenImpCasts(); | |||
11344 | switch (FromE->getStmtClass()) { | |||
11345 | default: | |||
11346 | break; | |||
11347 | case Stmt::ObjCStringLiteralClass: | |||
11348 | // "string literal" | |||
11349 | return LK_String; | |||
11350 | case Stmt::ObjCArrayLiteralClass: | |||
11351 | // "array literal" | |||
11352 | return LK_Array; | |||
11353 | case Stmt::ObjCDictionaryLiteralClass: | |||
11354 | // "dictionary literal" | |||
11355 | return LK_Dictionary; | |||
11356 | case Stmt::BlockExprClass: | |||
11357 | return LK_Block; | |||
11358 | case Stmt::ObjCBoxedExprClass: { | |||
11359 | Expr *Inner = cast<ObjCBoxedExpr>(FromE)->getSubExpr()->IgnoreParens(); | |||
11360 | switch (Inner->getStmtClass()) { | |||
11361 | case Stmt::IntegerLiteralClass: | |||
11362 | case Stmt::FloatingLiteralClass: | |||
11363 | case Stmt::CharacterLiteralClass: | |||
11364 | case Stmt::ObjCBoolLiteralExprClass: | |||
11365 | case Stmt::CXXBoolLiteralExprClass: | |||
11366 | // "numeric literal" | |||
11367 | return LK_Numeric; | |||
11368 | case Stmt::ImplicitCastExprClass: { | |||
11369 | CastKind CK = cast<CastExpr>(Inner)->getCastKind(); | |||
11370 | // Boolean literals can be represented by implicit casts. | |||
11371 | if (CK == CK_IntegralToBoolean || CK == CK_IntegralCast) | |||
11372 | return LK_Numeric; | |||
11373 | break; | |||
11374 | } | |||
11375 | default: | |||
11376 | break; | |||
11377 | } | |||
11378 | return LK_Boxed; | |||
11379 | } | |||
11380 | } | |||
11381 | return LK_None; | |||
11382 | } | |||
11383 | ||||
11384 | static void diagnoseObjCLiteralComparison(Sema &S, SourceLocation Loc, | |||
11385 | ExprResult &LHS, ExprResult &RHS, | |||
11386 | BinaryOperator::Opcode Opc){ | |||
11387 | Expr *Literal; | |||
11388 | Expr *Other; | |||
11389 | if (isObjCObjectLiteral(LHS)) { | |||
11390 | Literal = LHS.get(); | |||
11391 | Other = RHS.get(); | |||
11392 | } else { | |||
11393 | Literal = RHS.get(); | |||
11394 | Other = LHS.get(); | |||
11395 | } | |||
11396 | ||||
11397 | // Don't warn on comparisons against nil. | |||
11398 | Other = Other->IgnoreParenCasts(); | |||
11399 | if (Other->isNullPointerConstant(S.getASTContext(), | |||
11400 | Expr::NPC_ValueDependentIsNotNull)) | |||
11401 | return; | |||
11402 | ||||
11403 | // This should be kept in sync with warn_objc_literal_comparison. | |||
11404 | // LK_String should always be after the other literals, since it has its own | |||
11405 | // warning flag. | |||
11406 | Sema::ObjCLiteralKind LiteralKind = S.CheckLiteralKind(Literal); | |||
11407 | assert(LiteralKind != Sema::LK_Block)(static_cast <bool> (LiteralKind != Sema::LK_Block) ? void (0) : __assert_fail ("LiteralKind != Sema::LK_Block", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11407, __extension__ __PRETTY_FUNCTION__)); | |||
11408 | if (LiteralKind == Sema::LK_None) { | |||
11409 | llvm_unreachable("Unknown Objective-C object literal kind")::llvm::llvm_unreachable_internal("Unknown Objective-C object literal kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11409); | |||
11410 | } | |||
11411 | ||||
11412 | if (LiteralKind == Sema::LK_String) | |||
11413 | S.Diag(Loc, diag::warn_objc_string_literal_comparison) | |||
11414 | << Literal->getSourceRange(); | |||
11415 | else | |||
11416 | S.Diag(Loc, diag::warn_objc_literal_comparison) | |||
11417 | << LiteralKind << Literal->getSourceRange(); | |||
11418 | ||||
11419 | if (BinaryOperator::isEqualityOp(Opc) && | |||
11420 | hasIsEqualMethod(S, LHS.get(), RHS.get())) { | |||
11421 | SourceLocation Start = LHS.get()->getBeginLoc(); | |||
11422 | SourceLocation End = S.getLocForEndOfToken(RHS.get()->getEndLoc()); | |||
11423 | CharSourceRange OpRange = | |||
11424 | CharSourceRange::getCharRange(Loc, S.getLocForEndOfToken(Loc)); | |||
11425 | ||||
11426 | S.Diag(Loc, diag::note_objc_literal_comparison_isequal) | |||
11427 | << FixItHint::CreateInsertion(Start, Opc == BO_EQ ? "[" : "![") | |||
11428 | << FixItHint::CreateReplacement(OpRange, " isEqual:") | |||
11429 | << FixItHint::CreateInsertion(End, "]"); | |||
11430 | } | |||
11431 | } | |||
11432 | ||||
11433 | /// Warns on !x < y, !x & y where !(x < y), !(x & y) was probably intended. | |||
11434 | static void diagnoseLogicalNotOnLHSofCheck(Sema &S, ExprResult &LHS, | |||
11435 | ExprResult &RHS, SourceLocation Loc, | |||
11436 | BinaryOperatorKind Opc) { | |||
11437 | // Check that left hand side is !something. | |||
11438 | UnaryOperator *UO = dyn_cast<UnaryOperator>(LHS.get()->IgnoreImpCasts()); | |||
11439 | if (!UO || UO->getOpcode() != UO_LNot) return; | |||
11440 | ||||
11441 | // Only check if the right hand side is non-bool arithmetic type. | |||
11442 | if (RHS.get()->isKnownToHaveBooleanValue()) return; | |||
11443 | ||||
11444 | // Make sure that the something in !something is not bool. | |||
11445 | Expr *SubExpr = UO->getSubExpr()->IgnoreImpCasts(); | |||
11446 | if (SubExpr->isKnownToHaveBooleanValue()) return; | |||
11447 | ||||
11448 | // Emit warning. | |||
11449 | bool IsBitwiseOp = Opc == BO_And || Opc == BO_Or || Opc == BO_Xor; | |||
11450 | S.Diag(UO->getOperatorLoc(), diag::warn_logical_not_on_lhs_of_check) | |||
11451 | << Loc << IsBitwiseOp; | |||
11452 | ||||
11453 | // First note suggest !(x < y) | |||
11454 | SourceLocation FirstOpen = SubExpr->getBeginLoc(); | |||
11455 | SourceLocation FirstClose = RHS.get()->getEndLoc(); | |||
11456 | FirstClose = S.getLocForEndOfToken(FirstClose); | |||
11457 | if (FirstClose.isInvalid()) | |||
11458 | FirstOpen = SourceLocation(); | |||
11459 | S.Diag(UO->getOperatorLoc(), diag::note_logical_not_fix) | |||
11460 | << IsBitwiseOp | |||
11461 | << FixItHint::CreateInsertion(FirstOpen, "(") | |||
11462 | << FixItHint::CreateInsertion(FirstClose, ")"); | |||
11463 | ||||
11464 | // Second note suggests (!x) < y | |||
11465 | SourceLocation SecondOpen = LHS.get()->getBeginLoc(); | |||
11466 | SourceLocation SecondClose = LHS.get()->getEndLoc(); | |||
11467 | SecondClose = S.getLocForEndOfToken(SecondClose); | |||
11468 | if (SecondClose.isInvalid()) | |||
11469 | SecondOpen = SourceLocation(); | |||
11470 | S.Diag(UO->getOperatorLoc(), diag::note_logical_not_silence_with_parens) | |||
11471 | << FixItHint::CreateInsertion(SecondOpen, "(") | |||
11472 | << FixItHint::CreateInsertion(SecondClose, ")"); | |||
11473 | } | |||
11474 | ||||
11475 | // Returns true if E refers to a non-weak array. | |||
11476 | static bool checkForArray(const Expr *E) { | |||
11477 | const ValueDecl *D = nullptr; | |||
11478 | if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E)) { | |||
11479 | D = DR->getDecl(); | |||
11480 | } else if (const MemberExpr *Mem = dyn_cast<MemberExpr>(E)) { | |||
11481 | if (Mem->isImplicitAccess()) | |||
11482 | D = Mem->getMemberDecl(); | |||
11483 | } | |||
11484 | if (!D) | |||
11485 | return false; | |||
11486 | return D->getType()->isArrayType() && !D->isWeak(); | |||
11487 | } | |||
11488 | ||||
11489 | /// Diagnose some forms of syntactically-obvious tautological comparison. | |||
11490 | static void diagnoseTautologicalComparison(Sema &S, SourceLocation Loc, | |||
11491 | Expr *LHS, Expr *RHS, | |||
11492 | BinaryOperatorKind Opc) { | |||
11493 | Expr *LHSStripped = LHS->IgnoreParenImpCasts(); | |||
11494 | Expr *RHSStripped = RHS->IgnoreParenImpCasts(); | |||
11495 | ||||
11496 | QualType LHSType = LHS->getType(); | |||
11497 | QualType RHSType = RHS->getType(); | |||
11498 | if (LHSType->hasFloatingRepresentation() || | |||
11499 | (LHSType->isBlockPointerType() && !BinaryOperator::isEqualityOp(Opc)) || | |||
11500 | S.inTemplateInstantiation()) | |||
11501 | return; | |||
11502 | ||||
11503 | // Comparisons between two array types are ill-formed for operator<=>, so | |||
11504 | // we shouldn't emit any additional warnings about it. | |||
11505 | if (Opc == BO_Cmp && LHSType->isArrayType() && RHSType->isArrayType()) | |||
11506 | return; | |||
11507 | ||||
11508 | // For non-floating point types, check for self-comparisons of the form | |||
11509 | // x == x, x != x, x < x, etc. These always evaluate to a constant, and | |||
11510 | // often indicate logic errors in the program. | |||
11511 | // | |||
11512 | // NOTE: Don't warn about comparison expressions resulting from macro | |||
11513 | // expansion. Also don't warn about comparisons which are only self | |||
11514 | // comparisons within a template instantiation. The warnings should catch | |||
11515 | // obvious cases in the definition of the template anyways. The idea is to | |||
11516 | // warn when the typed comparison operator will always evaluate to the same | |||
11517 | // result. | |||
11518 | ||||
11519 | // Used for indexing into %select in warn_comparison_always | |||
11520 | enum { | |||
11521 | AlwaysConstant, | |||
11522 | AlwaysTrue, | |||
11523 | AlwaysFalse, | |||
11524 | AlwaysEqual, // std::strong_ordering::equal from operator<=> | |||
11525 | }; | |||
11526 | ||||
11527 | // C++2a [depr.array.comp]: | |||
11528 | // Equality and relational comparisons ([expr.eq], [expr.rel]) between two | |||
11529 | // operands of array type are deprecated. | |||
11530 | if (S.getLangOpts().CPlusPlus20 && LHSStripped->getType()->isArrayType() && | |||
11531 | RHSStripped->getType()->isArrayType()) { | |||
11532 | S.Diag(Loc, diag::warn_depr_array_comparison) | |||
11533 | << LHS->getSourceRange() << RHS->getSourceRange() | |||
11534 | << LHSStripped->getType() << RHSStripped->getType(); | |||
11535 | // Carry on to produce the tautological comparison warning, if this | |||
11536 | // expression is potentially-evaluated, we can resolve the array to a | |||
11537 | // non-weak declaration, and so on. | |||
11538 | } | |||
11539 | ||||
11540 | if (!LHS->getBeginLoc().isMacroID() && !RHS->getBeginLoc().isMacroID()) { | |||
11541 | if (Expr::isSameComparisonOperand(LHS, RHS)) { | |||
11542 | unsigned Result; | |||
11543 | switch (Opc) { | |||
11544 | case BO_EQ: | |||
11545 | case BO_LE: | |||
11546 | case BO_GE: | |||
11547 | Result = AlwaysTrue; | |||
11548 | break; | |||
11549 | case BO_NE: | |||
11550 | case BO_LT: | |||
11551 | case BO_GT: | |||
11552 | Result = AlwaysFalse; | |||
11553 | break; | |||
11554 | case BO_Cmp: | |||
11555 | Result = AlwaysEqual; | |||
11556 | break; | |||
11557 | default: | |||
11558 | Result = AlwaysConstant; | |||
11559 | break; | |||
11560 | } | |||
11561 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
11562 | S.PDiag(diag::warn_comparison_always) | |||
11563 | << 0 /*self-comparison*/ | |||
11564 | << Result); | |||
11565 | } else if (checkForArray(LHSStripped) && checkForArray(RHSStripped)) { | |||
11566 | // What is it always going to evaluate to? | |||
11567 | unsigned Result; | |||
11568 | switch (Opc) { | |||
11569 | case BO_EQ: // e.g. array1 == array2 | |||
11570 | Result = AlwaysFalse; | |||
11571 | break; | |||
11572 | case BO_NE: // e.g. array1 != array2 | |||
11573 | Result = AlwaysTrue; | |||
11574 | break; | |||
11575 | default: // e.g. array1 <= array2 | |||
11576 | // The best we can say is 'a constant' | |||
11577 | Result = AlwaysConstant; | |||
11578 | break; | |||
11579 | } | |||
11580 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
11581 | S.PDiag(diag::warn_comparison_always) | |||
11582 | << 1 /*array comparison*/ | |||
11583 | << Result); | |||
11584 | } | |||
11585 | } | |||
11586 | ||||
11587 | if (isa<CastExpr>(LHSStripped)) | |||
11588 | LHSStripped = LHSStripped->IgnoreParenCasts(); | |||
11589 | if (isa<CastExpr>(RHSStripped)) | |||
11590 | RHSStripped = RHSStripped->IgnoreParenCasts(); | |||
11591 | ||||
11592 | // Warn about comparisons against a string constant (unless the other | |||
11593 | // operand is null); the user probably wants string comparison function. | |||
11594 | Expr *LiteralString = nullptr; | |||
11595 | Expr *LiteralStringStripped = nullptr; | |||
11596 | if ((isa<StringLiteral>(LHSStripped) || isa<ObjCEncodeExpr>(LHSStripped)) && | |||
11597 | !RHSStripped->isNullPointerConstant(S.Context, | |||
11598 | Expr::NPC_ValueDependentIsNull)) { | |||
11599 | LiteralString = LHS; | |||
11600 | LiteralStringStripped = LHSStripped; | |||
11601 | } else if ((isa<StringLiteral>(RHSStripped) || | |||
11602 | isa<ObjCEncodeExpr>(RHSStripped)) && | |||
11603 | !LHSStripped->isNullPointerConstant(S.Context, | |||
11604 | Expr::NPC_ValueDependentIsNull)) { | |||
11605 | LiteralString = RHS; | |||
11606 | LiteralStringStripped = RHSStripped; | |||
11607 | } | |||
11608 | ||||
11609 | if (LiteralString) { | |||
11610 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
11611 | S.PDiag(diag::warn_stringcompare) | |||
11612 | << isa<ObjCEncodeExpr>(LiteralStringStripped) | |||
11613 | << LiteralString->getSourceRange()); | |||
11614 | } | |||
11615 | } | |||
11616 | ||||
11617 | static ImplicitConversionKind castKindToImplicitConversionKind(CastKind CK) { | |||
11618 | switch (CK) { | |||
11619 | default: { | |||
11620 | #ifndef NDEBUG | |||
11621 | llvm::errs() << "unhandled cast kind: " << CastExpr::getCastKindName(CK) | |||
11622 | << "\n"; | |||
11623 | #endif | |||
11624 | llvm_unreachable("unhandled cast kind")::llvm::llvm_unreachable_internal("unhandled cast kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11624); | |||
11625 | } | |||
11626 | case CK_UserDefinedConversion: | |||
11627 | return ICK_Identity; | |||
11628 | case CK_LValueToRValue: | |||
11629 | return ICK_Lvalue_To_Rvalue; | |||
11630 | case CK_ArrayToPointerDecay: | |||
11631 | return ICK_Array_To_Pointer; | |||
11632 | case CK_FunctionToPointerDecay: | |||
11633 | return ICK_Function_To_Pointer; | |||
11634 | case CK_IntegralCast: | |||
11635 | return ICK_Integral_Conversion; | |||
11636 | case CK_FloatingCast: | |||
11637 | return ICK_Floating_Conversion; | |||
11638 | case CK_IntegralToFloating: | |||
11639 | case CK_FloatingToIntegral: | |||
11640 | return ICK_Floating_Integral; | |||
11641 | case CK_IntegralComplexCast: | |||
11642 | case CK_FloatingComplexCast: | |||
11643 | case CK_FloatingComplexToIntegralComplex: | |||
11644 | case CK_IntegralComplexToFloatingComplex: | |||
11645 | return ICK_Complex_Conversion; | |||
11646 | case CK_FloatingComplexToReal: | |||
11647 | case CK_FloatingRealToComplex: | |||
11648 | case CK_IntegralComplexToReal: | |||
11649 | case CK_IntegralRealToComplex: | |||
11650 | return ICK_Complex_Real; | |||
11651 | } | |||
11652 | } | |||
11653 | ||||
11654 | static bool checkThreeWayNarrowingConversion(Sema &S, QualType ToType, Expr *E, | |||
11655 | QualType FromType, | |||
11656 | SourceLocation Loc) { | |||
11657 | // Check for a narrowing implicit conversion. | |||
11658 | StandardConversionSequence SCS; | |||
11659 | SCS.setAsIdentityConversion(); | |||
11660 | SCS.setToType(0, FromType); | |||
11661 | SCS.setToType(1, ToType); | |||
11662 | if (const auto *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
11663 | SCS.Second = castKindToImplicitConversionKind(ICE->getCastKind()); | |||
11664 | ||||
11665 | APValue PreNarrowingValue; | |||
11666 | QualType PreNarrowingType; | |||
11667 | switch (SCS.getNarrowingKind(S.Context, E, PreNarrowingValue, | |||
11668 | PreNarrowingType, | |||
11669 | /*IgnoreFloatToIntegralConversion*/ true)) { | |||
11670 | case NK_Dependent_Narrowing: | |||
11671 | // Implicit conversion to a narrower type, but the expression is | |||
11672 | // value-dependent so we can't tell whether it's actually narrowing. | |||
11673 | case NK_Not_Narrowing: | |||
11674 | return false; | |||
11675 | ||||
11676 | case NK_Constant_Narrowing: | |||
11677 | // Implicit conversion to a narrower type, and the value is not a constant | |||
11678 | // expression. | |||
11679 | S.Diag(E->getBeginLoc(), diag::err_spaceship_argument_narrowing) | |||
11680 | << /*Constant*/ 1 | |||
11681 | << PreNarrowingValue.getAsString(S.Context, PreNarrowingType) << ToType; | |||
11682 | return true; | |||
11683 | ||||
11684 | case NK_Variable_Narrowing: | |||
11685 | // Implicit conversion to a narrower type, and the value is not a constant | |||
11686 | // expression. | |||
11687 | case NK_Type_Narrowing: | |||
11688 | S.Diag(E->getBeginLoc(), diag::err_spaceship_argument_narrowing) | |||
11689 | << /*Constant*/ 0 << FromType << ToType; | |||
11690 | // TODO: It's not a constant expression, but what if the user intended it | |||
11691 | // to be? Can we produce notes to help them figure out why it isn't? | |||
11692 | return true; | |||
11693 | } | |||
11694 | llvm_unreachable("unhandled case in switch")::llvm::llvm_unreachable_internal("unhandled case in switch", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11694); | |||
11695 | } | |||
11696 | ||||
11697 | static QualType checkArithmeticOrEnumeralThreeWayCompare(Sema &S, | |||
11698 | ExprResult &LHS, | |||
11699 | ExprResult &RHS, | |||
11700 | SourceLocation Loc) { | |||
11701 | QualType LHSType = LHS.get()->getType(); | |||
11702 | QualType RHSType = RHS.get()->getType(); | |||
11703 | // Dig out the original argument type and expression before implicit casts | |||
11704 | // were applied. These are the types/expressions we need to check the | |||
11705 | // [expr.spaceship] requirements against. | |||
11706 | ExprResult LHSStripped = LHS.get()->IgnoreParenImpCasts(); | |||
11707 | ExprResult RHSStripped = RHS.get()->IgnoreParenImpCasts(); | |||
11708 | QualType LHSStrippedType = LHSStripped.get()->getType(); | |||
11709 | QualType RHSStrippedType = RHSStripped.get()->getType(); | |||
11710 | ||||
11711 | // C++2a [expr.spaceship]p3: If one of the operands is of type bool and the | |||
11712 | // other is not, the program is ill-formed. | |||
11713 | if (LHSStrippedType->isBooleanType() != RHSStrippedType->isBooleanType()) { | |||
11714 | S.InvalidOperands(Loc, LHSStripped, RHSStripped); | |||
11715 | return QualType(); | |||
11716 | } | |||
11717 | ||||
11718 | // FIXME: Consider combining this with checkEnumArithmeticConversions. | |||
11719 | int NumEnumArgs = (int)LHSStrippedType->isEnumeralType() + | |||
11720 | RHSStrippedType->isEnumeralType(); | |||
11721 | if (NumEnumArgs == 1) { | |||
11722 | bool LHSIsEnum = LHSStrippedType->isEnumeralType(); | |||
11723 | QualType OtherTy = LHSIsEnum ? RHSStrippedType : LHSStrippedType; | |||
11724 | if (OtherTy->hasFloatingRepresentation()) { | |||
11725 | S.InvalidOperands(Loc, LHSStripped, RHSStripped); | |||
11726 | return QualType(); | |||
11727 | } | |||
11728 | } | |||
11729 | if (NumEnumArgs == 2) { | |||
11730 | // C++2a [expr.spaceship]p5: If both operands have the same enumeration | |||
11731 | // type E, the operator yields the result of converting the operands | |||
11732 | // to the underlying type of E and applying <=> to the converted operands. | |||
11733 | if (!S.Context.hasSameUnqualifiedType(LHSStrippedType, RHSStrippedType)) { | |||
11734 | S.InvalidOperands(Loc, LHS, RHS); | |||
11735 | return QualType(); | |||
11736 | } | |||
11737 | QualType IntType = | |||
11738 | LHSStrippedType->castAs<EnumType>()->getDecl()->getIntegerType(); | |||
11739 | assert(IntType->isArithmeticType())(static_cast <bool> (IntType->isArithmeticType()) ? void (0) : __assert_fail ("IntType->isArithmeticType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11739, __extension__ __PRETTY_FUNCTION__)); | |||
11740 | ||||
11741 | // We can't use `CK_IntegralCast` when the underlying type is 'bool', so we | |||
11742 | // promote the boolean type, and all other promotable integer types, to | |||
11743 | // avoid this. | |||
11744 | if (IntType->isPromotableIntegerType()) | |||
11745 | IntType = S.Context.getPromotedIntegerType(IntType); | |||
11746 | ||||
11747 | LHS = S.ImpCastExprToType(LHS.get(), IntType, CK_IntegralCast); | |||
11748 | RHS = S.ImpCastExprToType(RHS.get(), IntType, CK_IntegralCast); | |||
11749 | LHSType = RHSType = IntType; | |||
11750 | } | |||
11751 | ||||
11752 | // C++2a [expr.spaceship]p4: If both operands have arithmetic types, the | |||
11753 | // usual arithmetic conversions are applied to the operands. | |||
11754 | QualType Type = | |||
11755 | S.UsualArithmeticConversions(LHS, RHS, Loc, Sema::ACK_Comparison); | |||
11756 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11757 | return QualType(); | |||
11758 | if (Type.isNull()) | |||
11759 | return S.InvalidOperands(Loc, LHS, RHS); | |||
11760 | ||||
11761 | Optional<ComparisonCategoryType> CCT = | |||
11762 | getComparisonCategoryForBuiltinCmp(Type); | |||
11763 | if (!CCT) | |||
11764 | return S.InvalidOperands(Loc, LHS, RHS); | |||
11765 | ||||
11766 | bool HasNarrowing = checkThreeWayNarrowingConversion( | |||
11767 | S, Type, LHS.get(), LHSType, LHS.get()->getBeginLoc()); | |||
11768 | HasNarrowing |= checkThreeWayNarrowingConversion(S, Type, RHS.get(), RHSType, | |||
11769 | RHS.get()->getBeginLoc()); | |||
11770 | if (HasNarrowing) | |||
11771 | return QualType(); | |||
11772 | ||||
11773 | assert(!Type.isNull() && "composite type for <=> has not been set")(static_cast <bool> (!Type.isNull() && "composite type for <=> has not been set" ) ? void (0) : __assert_fail ("!Type.isNull() && \"composite type for <=> has not been set\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11773, __extension__ __PRETTY_FUNCTION__)); | |||
11774 | ||||
11775 | return S.CheckComparisonCategoryType( | |||
11776 | *CCT, Loc, Sema::ComparisonCategoryUsage::OperatorInExpression); | |||
11777 | } | |||
11778 | ||||
11779 | static QualType checkArithmeticOrEnumeralCompare(Sema &S, ExprResult &LHS, | |||
11780 | ExprResult &RHS, | |||
11781 | SourceLocation Loc, | |||
11782 | BinaryOperatorKind Opc) { | |||
11783 | if (Opc == BO_Cmp) | |||
11784 | return checkArithmeticOrEnumeralThreeWayCompare(S, LHS, RHS, Loc); | |||
11785 | ||||
11786 | // C99 6.5.8p3 / C99 6.5.9p4 | |||
11787 | QualType Type = | |||
11788 | S.UsualArithmeticConversions(LHS, RHS, Loc, Sema::ACK_Comparison); | |||
11789 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11790 | return QualType(); | |||
11791 | if (Type.isNull()) | |||
11792 | return S.InvalidOperands(Loc, LHS, RHS); | |||
11793 | assert(Type->isArithmeticType() || Type->isEnumeralType())(static_cast <bool> (Type->isArithmeticType() || Type ->isEnumeralType()) ? void (0) : __assert_fail ("Type->isArithmeticType() || Type->isEnumeralType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11793, __extension__ __PRETTY_FUNCTION__)); | |||
11794 | ||||
11795 | if (Type->isAnyComplexType() && BinaryOperator::isRelationalOp(Opc)) | |||
11796 | return S.InvalidOperands(Loc, LHS, RHS); | |||
11797 | ||||
11798 | // Check for comparisons of floating point operands using != and ==. | |||
11799 | if (Type->hasFloatingRepresentation() && BinaryOperator::isEqualityOp(Opc)) | |||
11800 | S.CheckFloatComparison(Loc, LHS.get(), RHS.get()); | |||
11801 | ||||
11802 | // The result of comparisons is 'bool' in C++, 'int' in C. | |||
11803 | return S.Context.getLogicalOperationType(); | |||
11804 | } | |||
11805 | ||||
11806 | void Sema::CheckPtrComparisonWithNullChar(ExprResult &E, ExprResult &NullE) { | |||
11807 | if (!NullE.get()->getType()->isAnyPointerType()) | |||
11808 | return; | |||
11809 | int NullValue = PP.isMacroDefined("NULL") ? 0 : 1; | |||
11810 | if (!E.get()->getType()->isAnyPointerType() && | |||
11811 | E.get()->isNullPointerConstant(Context, | |||
11812 | Expr::NPC_ValueDependentIsNotNull) == | |||
11813 | Expr::NPCK_ZeroExpression) { | |||
11814 | if (const auto *CL = dyn_cast<CharacterLiteral>(E.get())) { | |||
11815 | if (CL->getValue() == 0) | |||
11816 | Diag(E.get()->getExprLoc(), diag::warn_pointer_compare) | |||
11817 | << NullValue | |||
11818 | << FixItHint::CreateReplacement(E.get()->getExprLoc(), | |||
11819 | NullValue ? "NULL" : "(void *)0"); | |||
11820 | } else if (const auto *CE = dyn_cast<CStyleCastExpr>(E.get())) { | |||
11821 | TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); | |||
11822 | QualType T = Context.getCanonicalType(TI->getType()).getUnqualifiedType(); | |||
11823 | if (T == Context.CharTy) | |||
11824 | Diag(E.get()->getExprLoc(), diag::warn_pointer_compare) | |||
11825 | << NullValue | |||
11826 | << FixItHint::CreateReplacement(E.get()->getExprLoc(), | |||
11827 | NullValue ? "NULL" : "(void *)0"); | |||
11828 | } | |||
11829 | } | |||
11830 | } | |||
11831 | ||||
11832 | // C99 6.5.8, C++ [expr.rel] | |||
11833 | QualType Sema::CheckCompareOperands(ExprResult &LHS, ExprResult &RHS, | |||
11834 | SourceLocation Loc, | |||
11835 | BinaryOperatorKind Opc) { | |||
11836 | bool IsRelational = BinaryOperator::isRelationalOp(Opc); | |||
11837 | bool IsThreeWay = Opc == BO_Cmp; | |||
11838 | bool IsOrdered = IsRelational || IsThreeWay; | |||
11839 | auto IsAnyPointerType = [](ExprResult E) { | |||
11840 | QualType Ty = E.get()->getType(); | |||
11841 | return Ty->isPointerType() || Ty->isMemberPointerType(); | |||
11842 | }; | |||
11843 | ||||
11844 | // C++2a [expr.spaceship]p6: If at least one of the operands is of pointer | |||
11845 | // type, array-to-pointer, ..., conversions are performed on both operands to | |||
11846 | // bring them to their composite type. | |||
11847 | // Otherwise, all comparisons expect an rvalue, so convert to rvalue before | |||
11848 | // any type-related checks. | |||
11849 | if (!IsThreeWay || IsAnyPointerType(LHS) || IsAnyPointerType(RHS)) { | |||
11850 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
11851 | if (LHS.isInvalid()) | |||
11852 | return QualType(); | |||
11853 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
11854 | if (RHS.isInvalid()) | |||
11855 | return QualType(); | |||
11856 | } else { | |||
11857 | LHS = DefaultLvalueConversion(LHS.get()); | |||
11858 | if (LHS.isInvalid()) | |||
11859 | return QualType(); | |||
11860 | RHS = DefaultLvalueConversion(RHS.get()); | |||
11861 | if (RHS.isInvalid()) | |||
11862 | return QualType(); | |||
11863 | } | |||
11864 | ||||
11865 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/true); | |||
11866 | if (!getLangOpts().CPlusPlus && BinaryOperator::isEqualityOp(Opc)) { | |||
11867 | CheckPtrComparisonWithNullChar(LHS, RHS); | |||
11868 | CheckPtrComparisonWithNullChar(RHS, LHS); | |||
11869 | } | |||
11870 | ||||
11871 | // Handle vector comparisons separately. | |||
11872 | if (LHS.get()->getType()->isVectorType() || | |||
11873 | RHS.get()->getType()->isVectorType()) | |||
11874 | return CheckVectorCompareOperands(LHS, RHS, Loc, Opc); | |||
11875 | ||||
11876 | diagnoseLogicalNotOnLHSofCheck(*this, LHS, RHS, Loc, Opc); | |||
11877 | diagnoseTautologicalComparison(*this, Loc, LHS.get(), RHS.get(), Opc); | |||
11878 | ||||
11879 | QualType LHSType = LHS.get()->getType(); | |||
11880 | QualType RHSType = RHS.get()->getType(); | |||
11881 | if ((LHSType->isArithmeticType() || LHSType->isEnumeralType()) && | |||
11882 | (RHSType->isArithmeticType() || RHSType->isEnumeralType())) | |||
11883 | return checkArithmeticOrEnumeralCompare(*this, LHS, RHS, Loc, Opc); | |||
11884 | ||||
11885 | const Expr::NullPointerConstantKind LHSNullKind = | |||
11886 | LHS.get()->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull); | |||
11887 | const Expr::NullPointerConstantKind RHSNullKind = | |||
11888 | RHS.get()->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull); | |||
11889 | bool LHSIsNull = LHSNullKind != Expr::NPCK_NotNull; | |||
11890 | bool RHSIsNull = RHSNullKind != Expr::NPCK_NotNull; | |||
11891 | ||||
11892 | auto computeResultTy = [&]() { | |||
11893 | if (Opc != BO_Cmp) | |||
11894 | return Context.getLogicalOperationType(); | |||
11895 | assert(getLangOpts().CPlusPlus)(static_cast <bool> (getLangOpts().CPlusPlus) ? void (0 ) : __assert_fail ("getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11895, __extension__ __PRETTY_FUNCTION__)); | |||
11896 | assert(Context.hasSameType(LHS.get()->getType(), RHS.get()->getType()))(static_cast <bool> (Context.hasSameType(LHS.get()-> getType(), RHS.get()->getType())) ? void (0) : __assert_fail ("Context.hasSameType(LHS.get()->getType(), RHS.get()->getType())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11896, __extension__ __PRETTY_FUNCTION__)); | |||
11897 | ||||
11898 | QualType CompositeTy = LHS.get()->getType(); | |||
11899 | assert(!CompositeTy->isReferenceType())(static_cast <bool> (!CompositeTy->isReferenceType() ) ? void (0) : __assert_fail ("!CompositeTy->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 11899, __extension__ __PRETTY_FUNCTION__)); | |||
11900 | ||||
11901 | Optional<ComparisonCategoryType> CCT = | |||
11902 | getComparisonCategoryForBuiltinCmp(CompositeTy); | |||
11903 | if (!CCT) | |||
11904 | return InvalidOperands(Loc, LHS, RHS); | |||
11905 | ||||
11906 | if (CompositeTy->isPointerType() && LHSIsNull != RHSIsNull) { | |||
11907 | // P0946R0: Comparisons between a null pointer constant and an object | |||
11908 | // pointer result in std::strong_equality, which is ill-formed under | |||
11909 | // P1959R0. | |||
11910 | Diag(Loc, diag::err_typecheck_three_way_comparison_of_pointer_and_zero) | |||
11911 | << (LHSIsNull ? LHS.get()->getSourceRange() | |||
11912 | : RHS.get()->getSourceRange()); | |||
11913 | return QualType(); | |||
11914 | } | |||
11915 | ||||
11916 | return CheckComparisonCategoryType( | |||
11917 | *CCT, Loc, ComparisonCategoryUsage::OperatorInExpression); | |||
11918 | }; | |||
11919 | ||||
11920 | if (!IsOrdered && LHSIsNull != RHSIsNull) { | |||
11921 | bool IsEquality = Opc == BO_EQ; | |||
11922 | if (RHSIsNull) | |||
11923 | DiagnoseAlwaysNonNullPointer(LHS.get(), RHSNullKind, IsEquality, | |||
11924 | RHS.get()->getSourceRange()); | |||
11925 | else | |||
11926 | DiagnoseAlwaysNonNullPointer(RHS.get(), LHSNullKind, IsEquality, | |||
11927 | LHS.get()->getSourceRange()); | |||
11928 | } | |||
11929 | ||||
11930 | if (IsOrdered && LHSType->isFunctionPointerType() && | |||
11931 | RHSType->isFunctionPointerType()) { | |||
11932 | // Valid unless a relational comparison of function pointers | |||
11933 | bool IsError = Opc == BO_Cmp; | |||
11934 | auto DiagID = | |||
11935 | IsError ? diag::err_typecheck_ordered_comparison_of_function_pointers | |||
11936 | : getLangOpts().CPlusPlus | |||
11937 | ? diag::warn_typecheck_ordered_comparison_of_function_pointers | |||
11938 | : diag::ext_typecheck_ordered_comparison_of_function_pointers; | |||
11939 | Diag(Loc, DiagID) << LHSType << RHSType << LHS.get()->getSourceRange() | |||
11940 | << RHS.get()->getSourceRange(); | |||
11941 | if (IsError) | |||
11942 | return QualType(); | |||
11943 | } | |||
11944 | ||||
11945 | if ((LHSType->isIntegerType() && !LHSIsNull) || | |||
11946 | (RHSType->isIntegerType() && !RHSIsNull)) { | |||
11947 | // Skip normal pointer conversion checks in this case; we have better | |||
11948 | // diagnostics for this below. | |||
11949 | } else if (getLangOpts().CPlusPlus) { | |||
11950 | // Equality comparison of a function pointer to a void pointer is invalid, | |||
11951 | // but we allow it as an extension. | |||
11952 | // FIXME: If we really want to allow this, should it be part of composite | |||
11953 | // pointer type computation so it works in conditionals too? | |||
11954 | if (!IsOrdered && | |||
11955 | ((LHSType->isFunctionPointerType() && RHSType->isVoidPointerType()) || | |||
11956 | (RHSType->isFunctionPointerType() && LHSType->isVoidPointerType()))) { | |||
11957 | // This is a gcc extension compatibility comparison. | |||
11958 | // In a SFINAE context, we treat this as a hard error to maintain | |||
11959 | // conformance with the C++ standard. | |||
11960 | diagnoseFunctionPointerToVoidComparison( | |||
11961 | *this, Loc, LHS, RHS, /*isError*/ (bool)isSFINAEContext()); | |||
11962 | ||||
11963 | if (isSFINAEContext()) | |||
11964 | return QualType(); | |||
11965 | ||||
11966 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
11967 | return computeResultTy(); | |||
11968 | } | |||
11969 | ||||
11970 | // C++ [expr.eq]p2: | |||
11971 | // If at least one operand is a pointer [...] bring them to their | |||
11972 | // composite pointer type. | |||
11973 | // C++ [expr.spaceship]p6 | |||
11974 | // If at least one of the operands is of pointer type, [...] bring them | |||
11975 | // to their composite pointer type. | |||
11976 | // C++ [expr.rel]p2: | |||
11977 | // If both operands are pointers, [...] bring them to their composite | |||
11978 | // pointer type. | |||
11979 | // For <=>, the only valid non-pointer types are arrays and functions, and | |||
11980 | // we already decayed those, so this is really the same as the relational | |||
11981 | // comparison rule. | |||
11982 | if ((int)LHSType->isPointerType() + (int)RHSType->isPointerType() >= | |||
11983 | (IsOrdered ? 2 : 1) && | |||
11984 | (!LangOpts.ObjCAutoRefCount || !(LHSType->isObjCObjectPointerType() || | |||
11985 | RHSType->isObjCObjectPointerType()))) { | |||
11986 | if (convertPointersToCompositeType(*this, Loc, LHS, RHS)) | |||
11987 | return QualType(); | |||
11988 | return computeResultTy(); | |||
11989 | } | |||
11990 | } else if (LHSType->isPointerType() && | |||
11991 | RHSType->isPointerType()) { // C99 6.5.8p2 | |||
11992 | // All of the following pointer-related warnings are GCC extensions, except | |||
11993 | // when handling null pointer constants. | |||
11994 | QualType LCanPointeeTy = | |||
11995 | LHSType->castAs<PointerType>()->getPointeeType().getCanonicalType(); | |||
11996 | QualType RCanPointeeTy = | |||
11997 | RHSType->castAs<PointerType>()->getPointeeType().getCanonicalType(); | |||
11998 | ||||
11999 | // C99 6.5.9p2 and C99 6.5.8p2 | |||
12000 | if (Context.typesAreCompatible(LCanPointeeTy.getUnqualifiedType(), | |||
12001 | RCanPointeeTy.getUnqualifiedType())) { | |||
12002 | if (IsRelational) { | |||
12003 | // Pointers both need to point to complete or incomplete types | |||
12004 | if ((LCanPointeeTy->isIncompleteType() != | |||
12005 | RCanPointeeTy->isIncompleteType()) && | |||
12006 | !getLangOpts().C11) { | |||
12007 | Diag(Loc, diag::ext_typecheck_compare_complete_incomplete_pointers) | |||
12008 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange() | |||
12009 | << LHSType << RHSType << LCanPointeeTy->isIncompleteType() | |||
12010 | << RCanPointeeTy->isIncompleteType(); | |||
12011 | } | |||
12012 | } | |||
12013 | } else if (!IsRelational && | |||
12014 | (LCanPointeeTy->isVoidType() || RCanPointeeTy->isVoidType())) { | |||
12015 | // Valid unless comparison between non-null pointer and function pointer | |||
12016 | if ((LCanPointeeTy->isFunctionType() || RCanPointeeTy->isFunctionType()) | |||
12017 | && !LHSIsNull && !RHSIsNull) | |||
12018 | diagnoseFunctionPointerToVoidComparison(*this, Loc, LHS, RHS, | |||
12019 | /*isError*/false); | |||
12020 | } else { | |||
12021 | // Invalid | |||
12022 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, /*isError*/false); | |||
12023 | } | |||
12024 | if (LCanPointeeTy != RCanPointeeTy) { | |||
12025 | // Treat NULL constant as a special case in OpenCL. | |||
12026 | if (getLangOpts().OpenCL && !LHSIsNull && !RHSIsNull) { | |||
12027 | if (!LCanPointeeTy.isAddressSpaceOverlapping(RCanPointeeTy)) { | |||
12028 | Diag(Loc, | |||
12029 | diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
12030 | << LHSType << RHSType << 0 /* comparison */ | |||
12031 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
12032 | } | |||
12033 | } | |||
12034 | LangAS AddrSpaceL = LCanPointeeTy.getAddressSpace(); | |||
12035 | LangAS AddrSpaceR = RCanPointeeTy.getAddressSpace(); | |||
12036 | CastKind Kind = AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion | |||
12037 | : CK_BitCast; | |||
12038 | if (LHSIsNull && !RHSIsNull) | |||
12039 | LHS = ImpCastExprToType(LHS.get(), RHSType, Kind); | |||
12040 | else | |||
12041 | RHS = ImpCastExprToType(RHS.get(), LHSType, Kind); | |||
12042 | } | |||
12043 | return computeResultTy(); | |||
12044 | } | |||
12045 | ||||
12046 | if (getLangOpts().CPlusPlus) { | |||
12047 | // C++ [expr.eq]p4: | |||
12048 | // Two operands of type std::nullptr_t or one operand of type | |||
12049 | // std::nullptr_t and the other a null pointer constant compare equal. | |||
12050 | if (!IsOrdered && LHSIsNull && RHSIsNull) { | |||
12051 | if (LHSType->isNullPtrType()) { | |||
12052 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12053 | return computeResultTy(); | |||
12054 | } | |||
12055 | if (RHSType->isNullPtrType()) { | |||
12056 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12057 | return computeResultTy(); | |||
12058 | } | |||
12059 | } | |||
12060 | ||||
12061 | // Comparison of Objective-C pointers and block pointers against nullptr_t. | |||
12062 | // These aren't covered by the composite pointer type rules. | |||
12063 | if (!IsOrdered && RHSType->isNullPtrType() && | |||
12064 | (LHSType->isObjCObjectPointerType() || LHSType->isBlockPointerType())) { | |||
12065 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12066 | return computeResultTy(); | |||
12067 | } | |||
12068 | if (!IsOrdered && LHSType->isNullPtrType() && | |||
12069 | (RHSType->isObjCObjectPointerType() || RHSType->isBlockPointerType())) { | |||
12070 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12071 | return computeResultTy(); | |||
12072 | } | |||
12073 | ||||
12074 | if (IsRelational && | |||
12075 | ((LHSType->isNullPtrType() && RHSType->isPointerType()) || | |||
12076 | (RHSType->isNullPtrType() && LHSType->isPointerType()))) { | |||
12077 | // HACK: Relational comparison of nullptr_t against a pointer type is | |||
12078 | // invalid per DR583, but we allow it within std::less<> and friends, | |||
12079 | // since otherwise common uses of it break. | |||
12080 | // FIXME: Consider removing this hack once LWG fixes std::less<> and | |||
12081 | // friends to have std::nullptr_t overload candidates. | |||
12082 | DeclContext *DC = CurContext; | |||
12083 | if (isa<FunctionDecl>(DC)) | |||
12084 | DC = DC->getParent(); | |||
12085 | if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(DC)) { | |||
12086 | if (CTSD->isInStdNamespace() && | |||
12087 | llvm::StringSwitch<bool>(CTSD->getName()) | |||
12088 | .Cases("less", "less_equal", "greater", "greater_equal", true) | |||
12089 | .Default(false)) { | |||
12090 | if (RHSType->isNullPtrType()) | |||
12091 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12092 | else | |||
12093 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12094 | return computeResultTy(); | |||
12095 | } | |||
12096 | } | |||
12097 | } | |||
12098 | ||||
12099 | // C++ [expr.eq]p2: | |||
12100 | // If at least one operand is a pointer to member, [...] bring them to | |||
12101 | // their composite pointer type. | |||
12102 | if (!IsOrdered && | |||
12103 | (LHSType->isMemberPointerType() || RHSType->isMemberPointerType())) { | |||
12104 | if (convertPointersToCompositeType(*this, Loc, LHS, RHS)) | |||
12105 | return QualType(); | |||
12106 | else | |||
12107 | return computeResultTy(); | |||
12108 | } | |||
12109 | } | |||
12110 | ||||
12111 | // Handle block pointer types. | |||
12112 | if (!IsOrdered && LHSType->isBlockPointerType() && | |||
12113 | RHSType->isBlockPointerType()) { | |||
12114 | QualType lpointee = LHSType->castAs<BlockPointerType>()->getPointeeType(); | |||
12115 | QualType rpointee = RHSType->castAs<BlockPointerType>()->getPointeeType(); | |||
12116 | ||||
12117 | if (!LHSIsNull && !RHSIsNull && | |||
12118 | !Context.typesAreCompatible(lpointee, rpointee)) { | |||
12119 | Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks) | |||
12120 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12121 | << RHS.get()->getSourceRange(); | |||
12122 | } | |||
12123 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
12124 | return computeResultTy(); | |||
12125 | } | |||
12126 | ||||
12127 | // Allow block pointers to be compared with null pointer constants. | |||
12128 | if (!IsOrdered | |||
12129 | && ((LHSType->isBlockPointerType() && RHSType->isPointerType()) | |||
12130 | || (LHSType->isPointerType() && RHSType->isBlockPointerType()))) { | |||
12131 | if (!LHSIsNull && !RHSIsNull) { | |||
12132 | if (!((RHSType->isPointerType() && RHSType->castAs<PointerType>() | |||
12133 | ->getPointeeType()->isVoidType()) | |||
12134 | || (LHSType->isPointerType() && LHSType->castAs<PointerType>() | |||
12135 | ->getPointeeType()->isVoidType()))) | |||
12136 | Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks) | |||
12137 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12138 | << RHS.get()->getSourceRange(); | |||
12139 | } | |||
12140 | if (LHSIsNull && !RHSIsNull) | |||
12141 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
12142 | RHSType->isPointerType() ? CK_BitCast | |||
12143 | : CK_AnyPointerToBlockPointerCast); | |||
12144 | else | |||
12145 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
12146 | LHSType->isPointerType() ? CK_BitCast | |||
12147 | : CK_AnyPointerToBlockPointerCast); | |||
12148 | return computeResultTy(); | |||
12149 | } | |||
12150 | ||||
12151 | if (LHSType->isObjCObjectPointerType() || | |||
12152 | RHSType->isObjCObjectPointerType()) { | |||
12153 | const PointerType *LPT = LHSType->getAs<PointerType>(); | |||
12154 | const PointerType *RPT = RHSType->getAs<PointerType>(); | |||
12155 | if (LPT || RPT) { | |||
12156 | bool LPtrToVoid = LPT ? LPT->getPointeeType()->isVoidType() : false; | |||
12157 | bool RPtrToVoid = RPT ? RPT->getPointeeType()->isVoidType() : false; | |||
12158 | ||||
12159 | if (!LPtrToVoid && !RPtrToVoid && | |||
12160 | !Context.typesAreCompatible(LHSType, RHSType)) { | |||
12161 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, | |||
12162 | /*isError*/false); | |||
12163 | } | |||
12164 | // FIXME: If LPtrToVoid, we should presumably convert the LHS rather than | |||
12165 | // the RHS, but we have test coverage for this behavior. | |||
12166 | // FIXME: Consider using convertPointersToCompositeType in C++. | |||
12167 | if (LHSIsNull && !RHSIsNull) { | |||
12168 | Expr *E = LHS.get(); | |||
12169 | if (getLangOpts().ObjCAutoRefCount) | |||
12170 | CheckObjCConversion(SourceRange(), RHSType, E, | |||
12171 | CCK_ImplicitConversion); | |||
12172 | LHS = ImpCastExprToType(E, RHSType, | |||
12173 | RPT ? CK_BitCast :CK_CPointerToObjCPointerCast); | |||
12174 | } | |||
12175 | else { | |||
12176 | Expr *E = RHS.get(); | |||
12177 | if (getLangOpts().ObjCAutoRefCount) | |||
12178 | CheckObjCConversion(SourceRange(), LHSType, E, CCK_ImplicitConversion, | |||
12179 | /*Diagnose=*/true, | |||
12180 | /*DiagnoseCFAudited=*/false, Opc); | |||
12181 | RHS = ImpCastExprToType(E, LHSType, | |||
12182 | LPT ? CK_BitCast :CK_CPointerToObjCPointerCast); | |||
12183 | } | |||
12184 | return computeResultTy(); | |||
12185 | } | |||
12186 | if (LHSType->isObjCObjectPointerType() && | |||
12187 | RHSType->isObjCObjectPointerType()) { | |||
12188 | if (!Context.areComparableObjCPointerTypes(LHSType, RHSType)) | |||
12189 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, | |||
12190 | /*isError*/false); | |||
12191 | if (isObjCObjectLiteral(LHS) || isObjCObjectLiteral(RHS)) | |||
12192 | diagnoseObjCLiteralComparison(*this, Loc, LHS, RHS, Opc); | |||
12193 | ||||
12194 | if (LHSIsNull && !RHSIsNull) | |||
12195 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
12196 | else | |||
12197 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
12198 | return computeResultTy(); | |||
12199 | } | |||
12200 | ||||
12201 | if (!IsOrdered && LHSType->isBlockPointerType() && | |||
12202 | RHSType->isBlockCompatibleObjCPointerType(Context)) { | |||
12203 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
12204 | CK_BlockPointerToObjCPointerCast); | |||
12205 | return computeResultTy(); | |||
12206 | } else if (!IsOrdered && | |||
12207 | LHSType->isBlockCompatibleObjCPointerType(Context) && | |||
12208 | RHSType->isBlockPointerType()) { | |||
12209 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
12210 | CK_BlockPointerToObjCPointerCast); | |||
12211 | return computeResultTy(); | |||
12212 | } | |||
12213 | } | |||
12214 | if ((LHSType->isAnyPointerType() && RHSType->isIntegerType()) || | |||
12215 | (LHSType->isIntegerType() && RHSType->isAnyPointerType())) { | |||
12216 | unsigned DiagID = 0; | |||
12217 | bool isError = false; | |||
12218 | if (LangOpts.DebuggerSupport) { | |||
12219 | // Under a debugger, allow the comparison of pointers to integers, | |||
12220 | // since users tend to want to compare addresses. | |||
12221 | } else if ((LHSIsNull && LHSType->isIntegerType()) || | |||
12222 | (RHSIsNull && RHSType->isIntegerType())) { | |||
12223 | if (IsOrdered) { | |||
12224 | isError = getLangOpts().CPlusPlus; | |||
12225 | DiagID = | |||
12226 | isError ? diag::err_typecheck_ordered_comparison_of_pointer_and_zero | |||
12227 | : diag::ext_typecheck_ordered_comparison_of_pointer_and_zero; | |||
12228 | } | |||
12229 | } else if (getLangOpts().CPlusPlus) { | |||
12230 | DiagID = diag::err_typecheck_comparison_of_pointer_integer; | |||
12231 | isError = true; | |||
12232 | } else if (IsOrdered) | |||
12233 | DiagID = diag::ext_typecheck_ordered_comparison_of_pointer_integer; | |||
12234 | else | |||
12235 | DiagID = diag::ext_typecheck_comparison_of_pointer_integer; | |||
12236 | ||||
12237 | if (DiagID) { | |||
12238 | Diag(Loc, DiagID) | |||
12239 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12240 | << RHS.get()->getSourceRange(); | |||
12241 | if (isError) | |||
12242 | return QualType(); | |||
12243 | } | |||
12244 | ||||
12245 | if (LHSType->isIntegerType()) | |||
12246 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
12247 | LHSIsNull ? CK_NullToPointer : CK_IntegralToPointer); | |||
12248 | else | |||
12249 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
12250 | RHSIsNull ? CK_NullToPointer : CK_IntegralToPointer); | |||
12251 | return computeResultTy(); | |||
12252 | } | |||
12253 | ||||
12254 | // Handle block pointers. | |||
12255 | if (!IsOrdered && RHSIsNull | |||
12256 | && LHSType->isBlockPointerType() && RHSType->isIntegerType()) { | |||
12257 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12258 | return computeResultTy(); | |||
12259 | } | |||
12260 | if (!IsOrdered && LHSIsNull | |||
12261 | && LHSType->isIntegerType() && RHSType->isBlockPointerType()) { | |||
12262 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12263 | return computeResultTy(); | |||
12264 | } | |||
12265 | ||||
12266 | if (getLangOpts().OpenCLVersion >= 200 || getLangOpts().OpenCLCPlusPlus) { | |||
12267 | if (LHSType->isClkEventT() && RHSType->isClkEventT()) { | |||
12268 | return computeResultTy(); | |||
12269 | } | |||
12270 | ||||
12271 | if (LHSType->isQueueT() && RHSType->isQueueT()) { | |||
12272 | return computeResultTy(); | |||
12273 | } | |||
12274 | ||||
12275 | if (LHSIsNull && RHSType->isQueueT()) { | |||
12276 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12277 | return computeResultTy(); | |||
12278 | } | |||
12279 | ||||
12280 | if (LHSType->isQueueT() && RHSIsNull) { | |||
12281 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12282 | return computeResultTy(); | |||
12283 | } | |||
12284 | } | |||
12285 | ||||
12286 | return InvalidOperands(Loc, LHS, RHS); | |||
12287 | } | |||
12288 | ||||
12289 | // Return a signed ext_vector_type that is of identical size and number of | |||
12290 | // elements. For floating point vectors, return an integer type of identical | |||
12291 | // size and number of elements. In the non ext_vector_type case, search from | |||
12292 | // the largest type to the smallest type to avoid cases where long long == long, | |||
12293 | // where long gets picked over long long. | |||
12294 | QualType Sema::GetSignedVectorType(QualType V) { | |||
12295 | const VectorType *VTy = V->castAs<VectorType>(); | |||
12296 | unsigned TypeSize = Context.getTypeSize(VTy->getElementType()); | |||
12297 | ||||
12298 | if (isa<ExtVectorType>(VTy)) { | |||
12299 | if (TypeSize == Context.getTypeSize(Context.CharTy)) | |||
12300 | return Context.getExtVectorType(Context.CharTy, VTy->getNumElements()); | |||
12301 | else if (TypeSize == Context.getTypeSize(Context.ShortTy)) | |||
12302 | return Context.getExtVectorType(Context.ShortTy, VTy->getNumElements()); | |||
12303 | else if (TypeSize == Context.getTypeSize(Context.IntTy)) | |||
12304 | return Context.getExtVectorType(Context.IntTy, VTy->getNumElements()); | |||
12305 | else if (TypeSize == Context.getTypeSize(Context.LongTy)) | |||
12306 | return Context.getExtVectorType(Context.LongTy, VTy->getNumElements()); | |||
12307 | assert(TypeSize == Context.getTypeSize(Context.LongLongTy) &&(static_cast <bool> (TypeSize == Context.getTypeSize(Context .LongLongTy) && "Unhandled vector element size in vector compare" ) ? void (0) : __assert_fail ("TypeSize == Context.getTypeSize(Context.LongLongTy) && \"Unhandled vector element size in vector compare\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12308, __extension__ __PRETTY_FUNCTION__)) | |||
12308 | "Unhandled vector element size in vector compare")(static_cast <bool> (TypeSize == Context.getTypeSize(Context .LongLongTy) && "Unhandled vector element size in vector compare" ) ? void (0) : __assert_fail ("TypeSize == Context.getTypeSize(Context.LongLongTy) && \"Unhandled vector element size in vector compare\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12308, __extension__ __PRETTY_FUNCTION__)); | |||
12309 | return Context.getExtVectorType(Context.LongLongTy, VTy->getNumElements()); | |||
12310 | } | |||
12311 | ||||
12312 | if (TypeSize == Context.getTypeSize(Context.LongLongTy)) | |||
12313 | return Context.getVectorType(Context.LongLongTy, VTy->getNumElements(), | |||
12314 | VectorType::GenericVector); | |||
12315 | else if (TypeSize == Context.getTypeSize(Context.LongTy)) | |||
12316 | return Context.getVectorType(Context.LongTy, VTy->getNumElements(), | |||
12317 | VectorType::GenericVector); | |||
12318 | else if (TypeSize == Context.getTypeSize(Context.IntTy)) | |||
12319 | return Context.getVectorType(Context.IntTy, VTy->getNumElements(), | |||
12320 | VectorType::GenericVector); | |||
12321 | else if (TypeSize == Context.getTypeSize(Context.ShortTy)) | |||
12322 | return Context.getVectorType(Context.ShortTy, VTy->getNumElements(), | |||
12323 | VectorType::GenericVector); | |||
12324 | assert(TypeSize == Context.getTypeSize(Context.CharTy) &&(static_cast <bool> (TypeSize == Context.getTypeSize(Context .CharTy) && "Unhandled vector element size in vector compare" ) ? void (0) : __assert_fail ("TypeSize == Context.getTypeSize(Context.CharTy) && \"Unhandled vector element size in vector compare\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12325, __extension__ __PRETTY_FUNCTION__)) | |||
12325 | "Unhandled vector element size in vector compare")(static_cast <bool> (TypeSize == Context.getTypeSize(Context .CharTy) && "Unhandled vector element size in vector compare" ) ? void (0) : __assert_fail ("TypeSize == Context.getTypeSize(Context.CharTy) && \"Unhandled vector element size in vector compare\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12325, __extension__ __PRETTY_FUNCTION__)); | |||
12326 | return Context.getVectorType(Context.CharTy, VTy->getNumElements(), | |||
12327 | VectorType::GenericVector); | |||
12328 | } | |||
12329 | ||||
12330 | /// CheckVectorCompareOperands - vector comparisons are a clang extension that | |||
12331 | /// operates on extended vector types. Instead of producing an IntTy result, | |||
12332 | /// like a scalar comparison, a vector comparison produces a vector of integer | |||
12333 | /// types. | |||
12334 | QualType Sema::CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, | |||
12335 | SourceLocation Loc, | |||
12336 | BinaryOperatorKind Opc) { | |||
12337 | if (Opc == BO_Cmp) { | |||
12338 | Diag(Loc, diag::err_three_way_vector_comparison); | |||
12339 | return QualType(); | |||
12340 | } | |||
12341 | ||||
12342 | // Check to make sure we're operating on vectors of the same type and width, | |||
12343 | // Allowing one side to be a scalar of element type. | |||
12344 | QualType vType = CheckVectorOperands(LHS, RHS, Loc, /*isCompAssign*/false, | |||
12345 | /*AllowBothBool*/true, | |||
12346 | /*AllowBoolConversions*/getLangOpts().ZVector); | |||
12347 | if (vType.isNull()) | |||
12348 | return vType; | |||
12349 | ||||
12350 | QualType LHSType = LHS.get()->getType(); | |||
12351 | ||||
12352 | // Determine the return type of a vector compare. By default clang will return | |||
12353 | // a scalar for all vector compares except vector bool and vector pixel. | |||
12354 | // With the gcc compiler we will always return a vector type and with the xl | |||
12355 | // compiler we will always return a scalar type. This switch allows choosing | |||
12356 | // which behavior is prefered. | |||
12357 | if (getLangOpts().AltiVec) { | |||
12358 | switch (getLangOpts().getAltivecSrcCompat()) { | |||
12359 | case LangOptions::AltivecSrcCompatKind::Mixed: | |||
12360 | // If AltiVec, the comparison results in a numeric type, i.e. | |||
12361 | // bool for C++, int for C | |||
12362 | if (vType->castAs<VectorType>()->getVectorKind() == | |||
12363 | VectorType::AltiVecVector) | |||
12364 | return Context.getLogicalOperationType(); | |||
12365 | else | |||
12366 | Diag(Loc, diag::warn_deprecated_altivec_src_compat); | |||
12367 | break; | |||
12368 | case LangOptions::AltivecSrcCompatKind::GCC: | |||
12369 | // For GCC we always return the vector type. | |||
12370 | break; | |||
12371 | case LangOptions::AltivecSrcCompatKind::XL: | |||
12372 | return Context.getLogicalOperationType(); | |||
12373 | break; | |||
12374 | } | |||
12375 | } | |||
12376 | ||||
12377 | // For non-floating point types, check for self-comparisons of the form | |||
12378 | // x == x, x != x, x < x, etc. These always evaluate to a constant, and | |||
12379 | // often indicate logic errors in the program. | |||
12380 | diagnoseTautologicalComparison(*this, Loc, LHS.get(), RHS.get(), Opc); | |||
12381 | ||||
12382 | // Check for comparisons of floating point operands using != and ==. | |||
12383 | if (BinaryOperator::isEqualityOp(Opc) && | |||
12384 | LHSType->hasFloatingRepresentation()) { | |||
12385 | assert(RHS.get()->getType()->hasFloatingRepresentation())(static_cast <bool> (RHS.get()->getType()->hasFloatingRepresentation ()) ? void (0) : __assert_fail ("RHS.get()->getType()->hasFloatingRepresentation()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12385, __extension__ __PRETTY_FUNCTION__)); | |||
12386 | CheckFloatComparison(Loc, LHS.get(), RHS.get()); | |||
12387 | } | |||
12388 | ||||
12389 | // Return a signed type for the vector. | |||
12390 | return GetSignedVectorType(vType); | |||
12391 | } | |||
12392 | ||||
12393 | static void diagnoseXorMisusedAsPow(Sema &S, const ExprResult &XorLHS, | |||
12394 | const ExprResult &XorRHS, | |||
12395 | const SourceLocation Loc) { | |||
12396 | // Do not diagnose macros. | |||
12397 | if (Loc.isMacroID()) | |||
12398 | return; | |||
12399 | ||||
12400 | // Do not diagnose if both LHS and RHS are macros. | |||
12401 | if (XorLHS.get()->getExprLoc().isMacroID() && | |||
12402 | XorRHS.get()->getExprLoc().isMacroID()) | |||
12403 | return; | |||
12404 | ||||
12405 | bool Negative = false; | |||
12406 | bool ExplicitPlus = false; | |||
12407 | const auto *LHSInt = dyn_cast<IntegerLiteral>(XorLHS.get()); | |||
12408 | const auto *RHSInt = dyn_cast<IntegerLiteral>(XorRHS.get()); | |||
12409 | ||||
12410 | if (!LHSInt) | |||
12411 | return; | |||
12412 | if (!RHSInt) { | |||
12413 | // Check negative literals. | |||
12414 | if (const auto *UO = dyn_cast<UnaryOperator>(XorRHS.get())) { | |||
12415 | UnaryOperatorKind Opc = UO->getOpcode(); | |||
12416 | if (Opc != UO_Minus && Opc != UO_Plus) | |||
12417 | return; | |||
12418 | RHSInt = dyn_cast<IntegerLiteral>(UO->getSubExpr()); | |||
12419 | if (!RHSInt) | |||
12420 | return; | |||
12421 | Negative = (Opc == UO_Minus); | |||
12422 | ExplicitPlus = !Negative; | |||
12423 | } else { | |||
12424 | return; | |||
12425 | } | |||
12426 | } | |||
12427 | ||||
12428 | const llvm::APInt &LeftSideValue = LHSInt->getValue(); | |||
12429 | llvm::APInt RightSideValue = RHSInt->getValue(); | |||
12430 | if (LeftSideValue != 2 && LeftSideValue != 10) | |||
12431 | return; | |||
12432 | ||||
12433 | if (LeftSideValue.getBitWidth() != RightSideValue.getBitWidth()) | |||
12434 | return; | |||
12435 | ||||
12436 | CharSourceRange ExprRange = CharSourceRange::getCharRange( | |||
12437 | LHSInt->getBeginLoc(), S.getLocForEndOfToken(RHSInt->getLocation())); | |||
12438 | llvm::StringRef ExprStr = | |||
12439 | Lexer::getSourceText(ExprRange, S.getSourceManager(), S.getLangOpts()); | |||
12440 | ||||
12441 | CharSourceRange XorRange = | |||
12442 | CharSourceRange::getCharRange(Loc, S.getLocForEndOfToken(Loc)); | |||
12443 | llvm::StringRef XorStr = | |||
12444 | Lexer::getSourceText(XorRange, S.getSourceManager(), S.getLangOpts()); | |||
12445 | // Do not diagnose if xor keyword/macro is used. | |||
12446 | if (XorStr == "xor") | |||
12447 | return; | |||
12448 | ||||
12449 | std::string LHSStr = std::string(Lexer::getSourceText( | |||
12450 | CharSourceRange::getTokenRange(LHSInt->getSourceRange()), | |||
12451 | S.getSourceManager(), S.getLangOpts())); | |||
12452 | std::string RHSStr = std::string(Lexer::getSourceText( | |||
12453 | CharSourceRange::getTokenRange(RHSInt->getSourceRange()), | |||
12454 | S.getSourceManager(), S.getLangOpts())); | |||
12455 | ||||
12456 | if (Negative) { | |||
12457 | RightSideValue = -RightSideValue; | |||
12458 | RHSStr = "-" + RHSStr; | |||
12459 | } else if (ExplicitPlus) { | |||
12460 | RHSStr = "+" + RHSStr; | |||
12461 | } | |||
12462 | ||||
12463 | StringRef LHSStrRef = LHSStr; | |||
12464 | StringRef RHSStrRef = RHSStr; | |||
12465 | // Do not diagnose literals with digit separators, binary, hexadecimal, octal | |||
12466 | // literals. | |||
12467 | if (LHSStrRef.startswith("0b") || LHSStrRef.startswith("0B") || | |||
12468 | RHSStrRef.startswith("0b") || RHSStrRef.startswith("0B") || | |||
12469 | LHSStrRef.startswith("0x") || LHSStrRef.startswith("0X") || | |||
12470 | RHSStrRef.startswith("0x") || RHSStrRef.startswith("0X") || | |||
12471 | (LHSStrRef.size() > 1 && LHSStrRef.startswith("0")) || | |||
12472 | (RHSStrRef.size() > 1 && RHSStrRef.startswith("0")) || | |||
12473 | LHSStrRef.find('\'') != StringRef::npos || | |||
12474 | RHSStrRef.find('\'') != StringRef::npos) | |||
12475 | return; | |||
12476 | ||||
12477 | bool SuggestXor = | |||
12478 | S.getLangOpts().CPlusPlus || S.getPreprocessor().isMacroDefined("xor"); | |||
12479 | const llvm::APInt XorValue = LeftSideValue ^ RightSideValue; | |||
12480 | int64_t RightSideIntValue = RightSideValue.getSExtValue(); | |||
12481 | if (LeftSideValue == 2 && RightSideIntValue >= 0) { | |||
12482 | std::string SuggestedExpr = "1 << " + RHSStr; | |||
12483 | bool Overflow = false; | |||
12484 | llvm::APInt One = (LeftSideValue - 1); | |||
12485 | llvm::APInt PowValue = One.sshl_ov(RightSideValue, Overflow); | |||
12486 | if (Overflow) { | |||
12487 | if (RightSideIntValue < 64) | |||
12488 | S.Diag(Loc, diag::warn_xor_used_as_pow_base) | |||
12489 | << ExprStr << toString(XorValue, 10, true) << ("1LL << " + RHSStr) | |||
12490 | << FixItHint::CreateReplacement(ExprRange, "1LL << " + RHSStr); | |||
12491 | else if (RightSideIntValue == 64) | |||
12492 | S.Diag(Loc, diag::warn_xor_used_as_pow) | |||
12493 | << ExprStr << toString(XorValue, 10, true); | |||
12494 | else | |||
12495 | return; | |||
12496 | } else { | |||
12497 | S.Diag(Loc, diag::warn_xor_used_as_pow_base_extra) | |||
12498 | << ExprStr << toString(XorValue, 10, true) << SuggestedExpr | |||
12499 | << toString(PowValue, 10, true) | |||
12500 | << FixItHint::CreateReplacement( | |||
12501 | ExprRange, (RightSideIntValue == 0) ? "1" : SuggestedExpr); | |||
12502 | } | |||
12503 | ||||
12504 | S.Diag(Loc, diag::note_xor_used_as_pow_silence) | |||
12505 | << ("0x2 ^ " + RHSStr) << SuggestXor; | |||
12506 | } else if (LeftSideValue == 10) { | |||
12507 | std::string SuggestedValue = "1e" + std::to_string(RightSideIntValue); | |||
12508 | S.Diag(Loc, diag::warn_xor_used_as_pow_base) | |||
12509 | << ExprStr << toString(XorValue, 10, true) << SuggestedValue | |||
12510 | << FixItHint::CreateReplacement(ExprRange, SuggestedValue); | |||
12511 | S.Diag(Loc, diag::note_xor_used_as_pow_silence) | |||
12512 | << ("0xA ^ " + RHSStr) << SuggestXor; | |||
12513 | } | |||
12514 | } | |||
12515 | ||||
12516 | QualType Sema::CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, | |||
12517 | SourceLocation Loc) { | |||
12518 | // Ensure that either both operands are of the same vector type, or | |||
12519 | // one operand is of a vector type and the other is of its element type. | |||
12520 | QualType vType = CheckVectorOperands(LHS, RHS, Loc, false, | |||
12521 | /*AllowBothBool*/true, | |||
12522 | /*AllowBoolConversions*/false); | |||
12523 | if (vType.isNull()) | |||
12524 | return InvalidOperands(Loc, LHS, RHS); | |||
12525 | if (getLangOpts().OpenCL && getLangOpts().OpenCLVersion < 120 && | |||
12526 | !getLangOpts().OpenCLCPlusPlus && vType->hasFloatingRepresentation()) | |||
12527 | return InvalidOperands(Loc, LHS, RHS); | |||
12528 | // FIXME: The check for C++ here is for GCC compatibility. GCC rejects the | |||
12529 | // usage of the logical operators && and || with vectors in C. This | |||
12530 | // check could be notionally dropped. | |||
12531 | if (!getLangOpts().CPlusPlus && | |||
12532 | !(isa<ExtVectorType>(vType->getAs<VectorType>()))) | |||
12533 | return InvalidLogicalVectorOperands(Loc, LHS, RHS); | |||
12534 | ||||
12535 | return GetSignedVectorType(LHS.get()->getType()); | |||
12536 | } | |||
12537 | ||||
12538 | QualType Sema::CheckMatrixElementwiseOperands(ExprResult &LHS, ExprResult &RHS, | |||
12539 | SourceLocation Loc, | |||
12540 | bool IsCompAssign) { | |||
12541 | if (!IsCompAssign) { | |||
12542 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
12543 | if (LHS.isInvalid()) | |||
12544 | return QualType(); | |||
12545 | } | |||
12546 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
12547 | if (RHS.isInvalid()) | |||
12548 | return QualType(); | |||
12549 | ||||
12550 | // For conversion purposes, we ignore any qualifiers. | |||
12551 | // For example, "const float" and "float" are equivalent. | |||
12552 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
12553 | QualType RHSType = RHS.get()->getType().getUnqualifiedType(); | |||
12554 | ||||
12555 | const MatrixType *LHSMatType = LHSType->getAs<MatrixType>(); | |||
12556 | const MatrixType *RHSMatType = RHSType->getAs<MatrixType>(); | |||
12557 | assert((LHSMatType || RHSMatType) && "At least one operand must be a matrix")(static_cast <bool> ((LHSMatType || RHSMatType) && "At least one operand must be a matrix") ? void (0) : __assert_fail ("(LHSMatType || RHSMatType) && \"At least one operand must be a matrix\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12557, __extension__ __PRETTY_FUNCTION__)); | |||
12558 | ||||
12559 | if (Context.hasSameType(LHSType, RHSType)) | |||
12560 | return LHSType; | |||
12561 | ||||
12562 | // Type conversion may change LHS/RHS. Keep copies to the original results, in | |||
12563 | // case we have to return InvalidOperands. | |||
12564 | ExprResult OriginalLHS = LHS; | |||
12565 | ExprResult OriginalRHS = RHS; | |||
12566 | if (LHSMatType && !RHSMatType) { | |||
12567 | RHS = tryConvertExprToType(RHS.get(), LHSMatType->getElementType()); | |||
12568 | if (!RHS.isInvalid()) | |||
12569 | return LHSType; | |||
12570 | ||||
12571 | return InvalidOperands(Loc, OriginalLHS, OriginalRHS); | |||
12572 | } | |||
12573 | ||||
12574 | if (!LHSMatType && RHSMatType) { | |||
12575 | LHS = tryConvertExprToType(LHS.get(), RHSMatType->getElementType()); | |||
12576 | if (!LHS.isInvalid()) | |||
12577 | return RHSType; | |||
12578 | return InvalidOperands(Loc, OriginalLHS, OriginalRHS); | |||
12579 | } | |||
12580 | ||||
12581 | return InvalidOperands(Loc, LHS, RHS); | |||
12582 | } | |||
12583 | ||||
12584 | QualType Sema::CheckMatrixMultiplyOperands(ExprResult &LHS, ExprResult &RHS, | |||
12585 | SourceLocation Loc, | |||
12586 | bool IsCompAssign) { | |||
12587 | if (!IsCompAssign) { | |||
12588 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
12589 | if (LHS.isInvalid()) | |||
12590 | return QualType(); | |||
12591 | } | |||
12592 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
12593 | if (RHS.isInvalid()) | |||
12594 | return QualType(); | |||
12595 | ||||
12596 | auto *LHSMatType = LHS.get()->getType()->getAs<ConstantMatrixType>(); | |||
12597 | auto *RHSMatType = RHS.get()->getType()->getAs<ConstantMatrixType>(); | |||
12598 | assert((LHSMatType || RHSMatType) && "At least one operand must be a matrix")(static_cast <bool> ((LHSMatType || RHSMatType) && "At least one operand must be a matrix") ? void (0) : __assert_fail ("(LHSMatType || RHSMatType) && \"At least one operand must be a matrix\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12598, __extension__ __PRETTY_FUNCTION__)); | |||
12599 | ||||
12600 | if (LHSMatType && RHSMatType) { | |||
12601 | if (LHSMatType->getNumColumns() != RHSMatType->getNumRows()) | |||
12602 | return InvalidOperands(Loc, LHS, RHS); | |||
12603 | ||||
12604 | if (!Context.hasSameType(LHSMatType->getElementType(), | |||
12605 | RHSMatType->getElementType())) | |||
12606 | return InvalidOperands(Loc, LHS, RHS); | |||
12607 | ||||
12608 | return Context.getConstantMatrixType(LHSMatType->getElementType(), | |||
12609 | LHSMatType->getNumRows(), | |||
12610 | RHSMatType->getNumColumns()); | |||
12611 | } | |||
12612 | return CheckMatrixElementwiseOperands(LHS, RHS, Loc, IsCompAssign); | |||
12613 | } | |||
12614 | ||||
12615 | inline QualType Sema::CheckBitwiseOperands(ExprResult &LHS, ExprResult &RHS, | |||
12616 | SourceLocation Loc, | |||
12617 | BinaryOperatorKind Opc) { | |||
12618 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
12619 | ||||
12620 | bool IsCompAssign = | |||
12621 | Opc == BO_AndAssign || Opc == BO_OrAssign || Opc == BO_XorAssign; | |||
12622 | ||||
12623 | if (LHS.get()->getType()->isVectorType() || | |||
12624 | RHS.get()->getType()->isVectorType()) { | |||
12625 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
12626 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
12627 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
12628 | /*AllowBothBool*/true, | |||
12629 | /*AllowBoolConversions*/getLangOpts().ZVector); | |||
12630 | return InvalidOperands(Loc, LHS, RHS); | |||
12631 | } | |||
12632 | ||||
12633 | if (Opc == BO_And) | |||
12634 | diagnoseLogicalNotOnLHSofCheck(*this, LHS, RHS, Loc, Opc); | |||
12635 | ||||
12636 | if (LHS.get()->getType()->hasFloatingRepresentation() || | |||
12637 | RHS.get()->getType()->hasFloatingRepresentation()) | |||
12638 | return InvalidOperands(Loc, LHS, RHS); | |||
12639 | ||||
12640 | ExprResult LHSResult = LHS, RHSResult = RHS; | |||
12641 | QualType compType = UsualArithmeticConversions( | |||
12642 | LHSResult, RHSResult, Loc, IsCompAssign ? ACK_CompAssign : ACK_BitwiseOp); | |||
12643 | if (LHSResult.isInvalid() || RHSResult.isInvalid()) | |||
12644 | return QualType(); | |||
12645 | LHS = LHSResult.get(); | |||
12646 | RHS = RHSResult.get(); | |||
12647 | ||||
12648 | if (Opc == BO_Xor) | |||
12649 | diagnoseXorMisusedAsPow(*this, LHS, RHS, Loc); | |||
12650 | ||||
12651 | if (!compType.isNull() && compType->isIntegralOrUnscopedEnumerationType()) | |||
12652 | return compType; | |||
12653 | return InvalidOperands(Loc, LHS, RHS); | |||
12654 | } | |||
12655 | ||||
12656 | // C99 6.5.[13,14] | |||
12657 | inline QualType Sema::CheckLogicalOperands(ExprResult &LHS, ExprResult &RHS, | |||
12658 | SourceLocation Loc, | |||
12659 | BinaryOperatorKind Opc) { | |||
12660 | // Check vector operands differently. | |||
12661 | if (LHS.get()->getType()->isVectorType() || RHS.get()->getType()->isVectorType()) | |||
12662 | return CheckVectorLogicalOperands(LHS, RHS, Loc); | |||
12663 | ||||
12664 | bool EnumConstantInBoolContext = false; | |||
12665 | for (const ExprResult &HS : {LHS, RHS}) { | |||
12666 | if (const auto *DREHS = dyn_cast<DeclRefExpr>(HS.get())) { | |||
12667 | const auto *ECDHS = dyn_cast<EnumConstantDecl>(DREHS->getDecl()); | |||
12668 | if (ECDHS && ECDHS->getInitVal() != 0 && ECDHS->getInitVal() != 1) | |||
12669 | EnumConstantInBoolContext = true; | |||
12670 | } | |||
12671 | } | |||
12672 | ||||
12673 | if (EnumConstantInBoolContext) | |||
12674 | Diag(Loc, diag::warn_enum_constant_in_bool_context); | |||
12675 | ||||
12676 | // Diagnose cases where the user write a logical and/or but probably meant a | |||
12677 | // bitwise one. We do this when the LHS is a non-bool integer and the RHS | |||
12678 | // is a constant. | |||
12679 | if (!EnumConstantInBoolContext && LHS.get()->getType()->isIntegerType() && | |||
12680 | !LHS.get()->getType()->isBooleanType() && | |||
12681 | RHS.get()->getType()->isIntegerType() && !RHS.get()->isValueDependent() && | |||
12682 | // Don't warn in macros or template instantiations. | |||
12683 | !Loc.isMacroID() && !inTemplateInstantiation()) { | |||
12684 | // If the RHS can be constant folded, and if it constant folds to something | |||
12685 | // that isn't 0 or 1 (which indicate a potential logical operation that | |||
12686 | // happened to fold to true/false) then warn. | |||
12687 | // Parens on the RHS are ignored. | |||
12688 | Expr::EvalResult EVResult; | |||
12689 | if (RHS.get()->EvaluateAsInt(EVResult, Context)) { | |||
12690 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
12691 | if ((getLangOpts().Bool && !RHS.get()->getType()->isBooleanType() && | |||
12692 | !RHS.get()->getExprLoc().isMacroID()) || | |||
12693 | (Result != 0 && Result != 1)) { | |||
12694 | Diag(Loc, diag::warn_logical_instead_of_bitwise) | |||
12695 | << RHS.get()->getSourceRange() | |||
12696 | << (Opc == BO_LAnd ? "&&" : "||"); | |||
12697 | // Suggest replacing the logical operator with the bitwise version | |||
12698 | Diag(Loc, diag::note_logical_instead_of_bitwise_change_operator) | |||
12699 | << (Opc == BO_LAnd ? "&" : "|") | |||
12700 | << FixItHint::CreateReplacement(SourceRange( | |||
12701 | Loc, getLocForEndOfToken(Loc)), | |||
12702 | Opc == BO_LAnd ? "&" : "|"); | |||
12703 | if (Opc == BO_LAnd) | |||
12704 | // Suggest replacing "Foo() && kNonZero" with "Foo()" | |||
12705 | Diag(Loc, diag::note_logical_instead_of_bitwise_remove_constant) | |||
12706 | << FixItHint::CreateRemoval( | |||
12707 | SourceRange(getLocForEndOfToken(LHS.get()->getEndLoc()), | |||
12708 | RHS.get()->getEndLoc())); | |||
12709 | } | |||
12710 | } | |||
12711 | } | |||
12712 | ||||
12713 | if (!Context.getLangOpts().CPlusPlus) { | |||
12714 | // OpenCL v1.1 s6.3.g: The logical operators and (&&), or (||) do | |||
12715 | // not operate on the built-in scalar and vector float types. | |||
12716 | if (Context.getLangOpts().OpenCL && | |||
12717 | Context.getLangOpts().OpenCLVersion < 120) { | |||
12718 | if (LHS.get()->getType()->isFloatingType() || | |||
12719 | RHS.get()->getType()->isFloatingType()) | |||
12720 | return InvalidOperands(Loc, LHS, RHS); | |||
12721 | } | |||
12722 | ||||
12723 | LHS = UsualUnaryConversions(LHS.get()); | |||
12724 | if (LHS.isInvalid()) | |||
12725 | return QualType(); | |||
12726 | ||||
12727 | RHS = UsualUnaryConversions(RHS.get()); | |||
12728 | if (RHS.isInvalid()) | |||
12729 | return QualType(); | |||
12730 | ||||
12731 | if (!LHS.get()->getType()->isScalarType() || | |||
12732 | !RHS.get()->getType()->isScalarType()) | |||
12733 | return InvalidOperands(Loc, LHS, RHS); | |||
12734 | ||||
12735 | return Context.IntTy; | |||
12736 | } | |||
12737 | ||||
12738 | // The following is safe because we only use this method for | |||
12739 | // non-overloadable operands. | |||
12740 | ||||
12741 | // C++ [expr.log.and]p1 | |||
12742 | // C++ [expr.log.or]p1 | |||
12743 | // The operands are both contextually converted to type bool. | |||
12744 | ExprResult LHSRes = PerformContextuallyConvertToBool(LHS.get()); | |||
12745 | if (LHSRes.isInvalid()) | |||
12746 | return InvalidOperands(Loc, LHS, RHS); | |||
12747 | LHS = LHSRes; | |||
12748 | ||||
12749 | ExprResult RHSRes = PerformContextuallyConvertToBool(RHS.get()); | |||
12750 | if (RHSRes.isInvalid()) | |||
12751 | return InvalidOperands(Loc, LHS, RHS); | |||
12752 | RHS = RHSRes; | |||
12753 | ||||
12754 | // C++ [expr.log.and]p2 | |||
12755 | // C++ [expr.log.or]p2 | |||
12756 | // The result is a bool. | |||
12757 | return Context.BoolTy; | |||
12758 | } | |||
12759 | ||||
12760 | static bool IsReadonlyMessage(Expr *E, Sema &S) { | |||
12761 | const MemberExpr *ME = dyn_cast<MemberExpr>(E); | |||
12762 | if (!ME) return false; | |||
12763 | if (!isa<FieldDecl>(ME->getMemberDecl())) return false; | |||
12764 | ObjCMessageExpr *Base = dyn_cast<ObjCMessageExpr>( | |||
12765 | ME->getBase()->IgnoreImplicit()->IgnoreParenImpCasts()); | |||
12766 | if (!Base) return false; | |||
12767 | return Base->getMethodDecl() != nullptr; | |||
12768 | } | |||
12769 | ||||
12770 | /// Is the given expression (which must be 'const') a reference to a | |||
12771 | /// variable which was originally non-const, but which has become | |||
12772 | /// 'const' due to being captured within a block? | |||
12773 | enum NonConstCaptureKind { NCCK_None, NCCK_Block, NCCK_Lambda }; | |||
12774 | static NonConstCaptureKind isReferenceToNonConstCapture(Sema &S, Expr *E) { | |||
12775 | assert(E->isLValue() && E->getType().isConstQualified())(static_cast <bool> (E->isLValue() && E-> getType().isConstQualified()) ? void (0) : __assert_fail ("E->isLValue() && E->getType().isConstQualified()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12775, __extension__ __PRETTY_FUNCTION__)); | |||
12776 | E = E->IgnoreParens(); | |||
12777 | ||||
12778 | // Must be a reference to a declaration from an enclosing scope. | |||
12779 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
12780 | if (!DRE) return NCCK_None; | |||
12781 | if (!DRE->refersToEnclosingVariableOrCapture()) return NCCK_None; | |||
12782 | ||||
12783 | // The declaration must be a variable which is not declared 'const'. | |||
12784 | VarDecl *var = dyn_cast<VarDecl>(DRE->getDecl()); | |||
12785 | if (!var) return NCCK_None; | |||
12786 | if (var->getType().isConstQualified()) return NCCK_None; | |||
12787 | assert(var->hasLocalStorage() && "capture added 'const' to non-local?")(static_cast <bool> (var->hasLocalStorage() && "capture added 'const' to non-local?") ? void (0) : __assert_fail ("var->hasLocalStorage() && \"capture added 'const' to non-local?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12787, __extension__ __PRETTY_FUNCTION__)); | |||
12788 | ||||
12789 | // Decide whether the first capture was for a block or a lambda. | |||
12790 | DeclContext *DC = S.CurContext, *Prev = nullptr; | |||
12791 | // Decide whether the first capture was for a block or a lambda. | |||
12792 | while (DC) { | |||
12793 | // For init-capture, it is possible that the variable belongs to the | |||
12794 | // template pattern of the current context. | |||
12795 | if (auto *FD = dyn_cast<FunctionDecl>(DC)) | |||
12796 | if (var->isInitCapture() && | |||
12797 | FD->getTemplateInstantiationPattern() == var->getDeclContext()) | |||
12798 | break; | |||
12799 | if (DC == var->getDeclContext()) | |||
12800 | break; | |||
12801 | Prev = DC; | |||
12802 | DC = DC->getParent(); | |||
12803 | } | |||
12804 | // Unless we have an init-capture, we've gone one step too far. | |||
12805 | if (!var->isInitCapture()) | |||
12806 | DC = Prev; | |||
12807 | return (isa<BlockDecl>(DC) ? NCCK_Block : NCCK_Lambda); | |||
12808 | } | |||
12809 | ||||
12810 | static bool IsTypeModifiable(QualType Ty, bool IsDereference) { | |||
12811 | Ty = Ty.getNonReferenceType(); | |||
12812 | if (IsDereference && Ty->isPointerType()) | |||
12813 | Ty = Ty->getPointeeType(); | |||
12814 | return !Ty.isConstQualified(); | |||
12815 | } | |||
12816 | ||||
12817 | // Update err_typecheck_assign_const and note_typecheck_assign_const | |||
12818 | // when this enum is changed. | |||
12819 | enum { | |||
12820 | ConstFunction, | |||
12821 | ConstVariable, | |||
12822 | ConstMember, | |||
12823 | ConstMethod, | |||
12824 | NestedConstMember, | |||
12825 | ConstUnknown, // Keep as last element | |||
12826 | }; | |||
12827 | ||||
12828 | /// Emit the "read-only variable not assignable" error and print notes to give | |||
12829 | /// more information about why the variable is not assignable, such as pointing | |||
12830 | /// to the declaration of a const variable, showing that a method is const, or | |||
12831 | /// that the function is returning a const reference. | |||
12832 | static void DiagnoseConstAssignment(Sema &S, const Expr *E, | |||
12833 | SourceLocation Loc) { | |||
12834 | SourceRange ExprRange = E->getSourceRange(); | |||
12835 | ||||
12836 | // Only emit one error on the first const found. All other consts will emit | |||
12837 | // a note to the error. | |||
12838 | bool DiagnosticEmitted = false; | |||
12839 | ||||
12840 | // Track if the current expression is the result of a dereference, and if the | |||
12841 | // next checked expression is the result of a dereference. | |||
12842 | bool IsDereference = false; | |||
12843 | bool NextIsDereference = false; | |||
12844 | ||||
12845 | // Loop to process MemberExpr chains. | |||
12846 | while (true) { | |||
12847 | IsDereference = NextIsDereference; | |||
12848 | ||||
12849 | E = E->IgnoreImplicit()->IgnoreParenImpCasts(); | |||
12850 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | |||
12851 | NextIsDereference = ME->isArrow(); | |||
12852 | const ValueDecl *VD = ME->getMemberDecl(); | |||
12853 | if (const FieldDecl *Field = dyn_cast<FieldDecl>(VD)) { | |||
12854 | // Mutable fields can be modified even if the class is const. | |||
12855 | if (Field->isMutable()) { | |||
12856 | assert(DiagnosticEmitted && "Expected diagnostic not emitted.")(static_cast <bool> (DiagnosticEmitted && "Expected diagnostic not emitted." ) ? void (0) : __assert_fail ("DiagnosticEmitted && \"Expected diagnostic not emitted.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 12856, __extension__ __PRETTY_FUNCTION__)); | |||
12857 | break; | |||
12858 | } | |||
12859 | ||||
12860 | if (!IsTypeModifiable(Field->getType(), IsDereference)) { | |||
12861 | if (!DiagnosticEmitted) { | |||
12862 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
12863 | << ExprRange << ConstMember << false /*static*/ << Field | |||
12864 | << Field->getType(); | |||
12865 | DiagnosticEmitted = true; | |||
12866 | } | |||
12867 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
12868 | << ConstMember << false /*static*/ << Field << Field->getType() | |||
12869 | << Field->getSourceRange(); | |||
12870 | } | |||
12871 | E = ME->getBase(); | |||
12872 | continue; | |||
12873 | } else if (const VarDecl *VDecl = dyn_cast<VarDecl>(VD)) { | |||
12874 | if (VDecl->getType().isConstQualified()) { | |||
12875 | if (!DiagnosticEmitted) { | |||
12876 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
12877 | << ExprRange << ConstMember << true /*static*/ << VDecl | |||
12878 | << VDecl->getType(); | |||
12879 | DiagnosticEmitted = true; | |||
12880 | } | |||
12881 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
12882 | << ConstMember << true /*static*/ << VDecl << VDecl->getType() | |||
12883 | << VDecl->getSourceRange(); | |||
12884 | } | |||
12885 | // Static fields do not inherit constness from parents. | |||
12886 | break; | |||
12887 | } | |||
12888 | break; // End MemberExpr | |||
12889 | } else if (const ArraySubscriptExpr *ASE = | |||
12890 | dyn_cast<ArraySubscriptExpr>(E)) { | |||
12891 | E = ASE->getBase()->IgnoreParenImpCasts(); | |||
12892 | continue; | |||
12893 | } else if (const ExtVectorElementExpr *EVE = | |||
12894 | dyn_cast<ExtVectorElementExpr>(E)) { | |||
12895 | E = EVE->getBase()->IgnoreParenImpCasts(); | |||
12896 | continue; | |||
12897 | } | |||
12898 | break; | |||
12899 | } | |||
12900 | ||||
12901 | if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { | |||
12902 | // Function calls | |||
12903 | const FunctionDecl *FD = CE->getDirectCallee(); | |||
12904 | if (FD && !IsTypeModifiable(FD->getReturnType(), IsDereference)) { | |||
12905 | if (!DiagnosticEmitted) { | |||
12906 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange | |||
12907 | << ConstFunction << FD; | |||
12908 | DiagnosticEmitted = true; | |||
12909 | } | |||
12910 | S.Diag(FD->getReturnTypeSourceRange().getBegin(), | |||
12911 | diag::note_typecheck_assign_const) | |||
12912 | << ConstFunction << FD << FD->getReturnType() | |||
12913 | << FD->getReturnTypeSourceRange(); | |||
12914 | } | |||
12915 | } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
12916 | // Point to variable declaration. | |||
12917 | if (const ValueDecl *VD = DRE->getDecl()) { | |||
12918 | if (!IsTypeModifiable(VD->getType(), IsDereference)) { | |||
12919 | if (!DiagnosticEmitted) { | |||
12920 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
12921 | << ExprRange << ConstVariable << VD << VD->getType(); | |||
12922 | DiagnosticEmitted = true; | |||
12923 | } | |||
12924 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
12925 | << ConstVariable << VD << VD->getType() << VD->getSourceRange(); | |||
12926 | } | |||
12927 | } | |||
12928 | } else if (isa<CXXThisExpr>(E)) { | |||
12929 | if (const DeclContext *DC = S.getFunctionLevelDeclContext()) { | |||
12930 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DC)) { | |||
12931 | if (MD->isConst()) { | |||
12932 | if (!DiagnosticEmitted) { | |||
12933 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange | |||
12934 | << ConstMethod << MD; | |||
12935 | DiagnosticEmitted = true; | |||
12936 | } | |||
12937 | S.Diag(MD->getLocation(), diag::note_typecheck_assign_const) | |||
12938 | << ConstMethod << MD << MD->getSourceRange(); | |||
12939 | } | |||
12940 | } | |||
12941 | } | |||
12942 | } | |||
12943 | ||||
12944 | if (DiagnosticEmitted) | |||
12945 | return; | |||
12946 | ||||
12947 | // Can't determine a more specific message, so display the generic error. | |||
12948 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange << ConstUnknown; | |||
12949 | } | |||
12950 | ||||
12951 | enum OriginalExprKind { | |||
12952 | OEK_Variable, | |||
12953 | OEK_Member, | |||
12954 | OEK_LValue | |||
12955 | }; | |||
12956 | ||||
12957 | static void DiagnoseRecursiveConstFields(Sema &S, const ValueDecl *VD, | |||
12958 | const RecordType *Ty, | |||
12959 | SourceLocation Loc, SourceRange Range, | |||
12960 | OriginalExprKind OEK, | |||
12961 | bool &DiagnosticEmitted) { | |||
12962 | std::vector<const RecordType *> RecordTypeList; | |||
12963 | RecordTypeList.push_back(Ty); | |||
12964 | unsigned NextToCheckIndex = 0; | |||
12965 | // We walk the record hierarchy breadth-first to ensure that we print | |||
12966 | // diagnostics in field nesting order. | |||
12967 | while (RecordTypeList.size() > NextToCheckIndex) { | |||
12968 | bool IsNested = NextToCheckIndex > 0; | |||
12969 | for (const FieldDecl *Field : | |||
12970 | RecordTypeList[NextToCheckIndex]->getDecl()->fields()) { | |||
12971 | // First, check every field for constness. | |||
12972 | QualType FieldTy = Field->getType(); | |||
12973 | if (FieldTy.isConstQualified()) { | |||
12974 | if (!DiagnosticEmitted) { | |||
12975 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
12976 | << Range << NestedConstMember << OEK << VD | |||
12977 | << IsNested << Field; | |||
12978 | DiagnosticEmitted = true; | |||
12979 | } | |||
12980 | S.Diag(Field->getLocation(), diag::note_typecheck_assign_const) | |||
12981 | << NestedConstMember << IsNested << Field | |||
12982 | << FieldTy << Field->getSourceRange(); | |||
12983 | } | |||
12984 | ||||
12985 | // Then we append it to the list to check next in order. | |||
12986 | FieldTy = FieldTy.getCanonicalType(); | |||
12987 | if (const auto *FieldRecTy = FieldTy->getAs<RecordType>()) { | |||
12988 | if (llvm::find(RecordTypeList, FieldRecTy) == RecordTypeList.end()) | |||
12989 | RecordTypeList.push_back(FieldRecTy); | |||
12990 | } | |||
12991 | } | |||
12992 | ++NextToCheckIndex; | |||
12993 | } | |||
12994 | } | |||
12995 | ||||
12996 | /// Emit an error for the case where a record we are trying to assign to has a | |||
12997 | /// const-qualified field somewhere in its hierarchy. | |||
12998 | static void DiagnoseRecursiveConstFields(Sema &S, const Expr *E, | |||
12999 | SourceLocation Loc) { | |||
13000 | QualType Ty = E->getType(); | |||
13001 | assert(Ty->isRecordType() && "lvalue was not record?")(static_cast <bool> (Ty->isRecordType() && "lvalue was not record?" ) ? void (0) : __assert_fail ("Ty->isRecordType() && \"lvalue was not record?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13001, __extension__ __PRETTY_FUNCTION__)); | |||
13002 | SourceRange Range = E->getSourceRange(); | |||
13003 | const RecordType *RTy = Ty.getCanonicalType()->getAs<RecordType>(); | |||
13004 | bool DiagEmitted = false; | |||
13005 | ||||
13006 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) | |||
13007 | DiagnoseRecursiveConstFields(S, ME->getMemberDecl(), RTy, Loc, | |||
13008 | Range, OEK_Member, DiagEmitted); | |||
13009 | else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) | |||
13010 | DiagnoseRecursiveConstFields(S, DRE->getDecl(), RTy, Loc, | |||
13011 | Range, OEK_Variable, DiagEmitted); | |||
13012 | else | |||
13013 | DiagnoseRecursiveConstFields(S, nullptr, RTy, Loc, | |||
13014 | Range, OEK_LValue, DiagEmitted); | |||
13015 | if (!DiagEmitted) | |||
13016 | DiagnoseConstAssignment(S, E, Loc); | |||
13017 | } | |||
13018 | ||||
13019 | /// CheckForModifiableLvalue - Verify that E is a modifiable lvalue. If not, | |||
13020 | /// emit an error and return true. If so, return false. | |||
13021 | static bool CheckForModifiableLvalue(Expr *E, SourceLocation Loc, Sema &S) { | |||
13022 | assert(!E->hasPlaceholderType(BuiltinType::PseudoObject))(static_cast <bool> (!E->hasPlaceholderType(BuiltinType ::PseudoObject)) ? void (0) : __assert_fail ("!E->hasPlaceholderType(BuiltinType::PseudoObject)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13022, __extension__ __PRETTY_FUNCTION__)); | |||
13023 | ||||
13024 | S.CheckShadowingDeclModification(E, Loc); | |||
13025 | ||||
13026 | SourceLocation OrigLoc = Loc; | |||
13027 | Expr::isModifiableLvalueResult IsLV = E->isModifiableLvalue(S.Context, | |||
13028 | &Loc); | |||
13029 | if (IsLV == Expr::MLV_ClassTemporary && IsReadonlyMessage(E, S)) | |||
13030 | IsLV = Expr::MLV_InvalidMessageExpression; | |||
13031 | if (IsLV == Expr::MLV_Valid) | |||
13032 | return false; | |||
13033 | ||||
13034 | unsigned DiagID = 0; | |||
13035 | bool NeedType = false; | |||
13036 | switch (IsLV) { // C99 6.5.16p2 | |||
13037 | case Expr::MLV_ConstQualified: | |||
13038 | // Use a specialized diagnostic when we're assigning to an object | |||
13039 | // from an enclosing function or block. | |||
13040 | if (NonConstCaptureKind NCCK = isReferenceToNonConstCapture(S, E)) { | |||
13041 | if (NCCK == NCCK_Block) | |||
13042 | DiagID = diag::err_block_decl_ref_not_modifiable_lvalue; | |||
13043 | else | |||
13044 | DiagID = diag::err_lambda_decl_ref_not_modifiable_lvalue; | |||
13045 | break; | |||
13046 | } | |||
13047 | ||||
13048 | // In ARC, use some specialized diagnostics for occasions where we | |||
13049 | // infer 'const'. These are always pseudo-strong variables. | |||
13050 | if (S.getLangOpts().ObjCAutoRefCount) { | |||
13051 | DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts()); | |||
13052 | if (declRef && isa<VarDecl>(declRef->getDecl())) { | |||
13053 | VarDecl *var = cast<VarDecl>(declRef->getDecl()); | |||
13054 | ||||
13055 | // Use the normal diagnostic if it's pseudo-__strong but the | |||
13056 | // user actually wrote 'const'. | |||
13057 | if (var->isARCPseudoStrong() && | |||
13058 | (!var->getTypeSourceInfo() || | |||
13059 | !var->getTypeSourceInfo()->getType().isConstQualified())) { | |||
13060 | // There are three pseudo-strong cases: | |||
13061 | // - self | |||
13062 | ObjCMethodDecl *method = S.getCurMethodDecl(); | |||
13063 | if (method && var == method->getSelfDecl()) { | |||
13064 | DiagID = method->isClassMethod() | |||
13065 | ? diag::err_typecheck_arc_assign_self_class_method | |||
13066 | : diag::err_typecheck_arc_assign_self; | |||
13067 | ||||
13068 | // - Objective-C externally_retained attribute. | |||
13069 | } else if (var->hasAttr<ObjCExternallyRetainedAttr>() || | |||
13070 | isa<ParmVarDecl>(var)) { | |||
13071 | DiagID = diag::err_typecheck_arc_assign_externally_retained; | |||
13072 | ||||
13073 | // - fast enumeration variables | |||
13074 | } else { | |||
13075 | DiagID = diag::err_typecheck_arr_assign_enumeration; | |||
13076 | } | |||
13077 | ||||
13078 | SourceRange Assign; | |||
13079 | if (Loc != OrigLoc) | |||
13080 | Assign = SourceRange(OrigLoc, OrigLoc); | |||
13081 | S.Diag(Loc, DiagID) << E->getSourceRange() << Assign; | |||
13082 | // We need to preserve the AST regardless, so migration tool | |||
13083 | // can do its job. | |||
13084 | return false; | |||
13085 | } | |||
13086 | } | |||
13087 | } | |||
13088 | ||||
13089 | // If none of the special cases above are triggered, then this is a | |||
13090 | // simple const assignment. | |||
13091 | if (DiagID == 0) { | |||
13092 | DiagnoseConstAssignment(S, E, Loc); | |||
13093 | return true; | |||
13094 | } | |||
13095 | ||||
13096 | break; | |||
13097 | case Expr::MLV_ConstAddrSpace: | |||
13098 | DiagnoseConstAssignment(S, E, Loc); | |||
13099 | return true; | |||
13100 | case Expr::MLV_ConstQualifiedField: | |||
13101 | DiagnoseRecursiveConstFields(S, E, Loc); | |||
13102 | return true; | |||
13103 | case Expr::MLV_ArrayType: | |||
13104 | case Expr::MLV_ArrayTemporary: | |||
13105 | DiagID = diag::err_typecheck_array_not_modifiable_lvalue; | |||
13106 | NeedType = true; | |||
13107 | break; | |||
13108 | case Expr::MLV_NotObjectType: | |||
13109 | DiagID = diag::err_typecheck_non_object_not_modifiable_lvalue; | |||
13110 | NeedType = true; | |||
13111 | break; | |||
13112 | case Expr::MLV_LValueCast: | |||
13113 | DiagID = diag::err_typecheck_lvalue_casts_not_supported; | |||
13114 | break; | |||
13115 | case Expr::MLV_Valid: | |||
13116 | llvm_unreachable("did not take early return for MLV_Valid")::llvm::llvm_unreachable_internal("did not take early return for MLV_Valid" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13116); | |||
13117 | case Expr::MLV_InvalidExpression: | |||
13118 | case Expr::MLV_MemberFunction: | |||
13119 | case Expr::MLV_ClassTemporary: | |||
13120 | DiagID = diag::err_typecheck_expression_not_modifiable_lvalue; | |||
13121 | break; | |||
13122 | case Expr::MLV_IncompleteType: | |||
13123 | case Expr::MLV_IncompleteVoidType: | |||
13124 | return S.RequireCompleteType(Loc, E->getType(), | |||
13125 | diag::err_typecheck_incomplete_type_not_modifiable_lvalue, E); | |||
13126 | case Expr::MLV_DuplicateVectorComponents: | |||
13127 | DiagID = diag::err_typecheck_duplicate_vector_components_not_mlvalue; | |||
13128 | break; | |||
13129 | case Expr::MLV_NoSetterProperty: | |||
13130 | llvm_unreachable("readonly properties should be processed differently")::llvm::llvm_unreachable_internal("readonly properties should be processed differently" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13130); | |||
13131 | case Expr::MLV_InvalidMessageExpression: | |||
13132 | DiagID = diag::err_readonly_message_assignment; | |||
13133 | break; | |||
13134 | case Expr::MLV_SubObjCPropertySetting: | |||
13135 | DiagID = diag::err_no_subobject_property_setting; | |||
13136 | break; | |||
13137 | } | |||
13138 | ||||
13139 | SourceRange Assign; | |||
13140 | if (Loc != OrigLoc) | |||
13141 | Assign = SourceRange(OrigLoc, OrigLoc); | |||
13142 | if (NeedType) | |||
13143 | S.Diag(Loc, DiagID) << E->getType() << E->getSourceRange() << Assign; | |||
13144 | else | |||
13145 | S.Diag(Loc, DiagID) << E->getSourceRange() << Assign; | |||
13146 | return true; | |||
13147 | } | |||
13148 | ||||
13149 | static void CheckIdentityFieldAssignment(Expr *LHSExpr, Expr *RHSExpr, | |||
13150 | SourceLocation Loc, | |||
13151 | Sema &Sema) { | |||
13152 | if (Sema.inTemplateInstantiation()) | |||
13153 | return; | |||
13154 | if (Sema.isUnevaluatedContext()) | |||
13155 | return; | |||
13156 | if (Loc.isInvalid() || Loc.isMacroID()) | |||
13157 | return; | |||
13158 | if (LHSExpr->getExprLoc().isMacroID() || RHSExpr->getExprLoc().isMacroID()) | |||
13159 | return; | |||
13160 | ||||
13161 | // C / C++ fields | |||
13162 | MemberExpr *ML = dyn_cast<MemberExpr>(LHSExpr); | |||
13163 | MemberExpr *MR = dyn_cast<MemberExpr>(RHSExpr); | |||
13164 | if (ML && MR) { | |||
13165 | if (!(isa<CXXThisExpr>(ML->getBase()) && isa<CXXThisExpr>(MR->getBase()))) | |||
13166 | return; | |||
13167 | const ValueDecl *LHSDecl = | |||
13168 | cast<ValueDecl>(ML->getMemberDecl()->getCanonicalDecl()); | |||
13169 | const ValueDecl *RHSDecl = | |||
13170 | cast<ValueDecl>(MR->getMemberDecl()->getCanonicalDecl()); | |||
13171 | if (LHSDecl != RHSDecl) | |||
13172 | return; | |||
13173 | if (LHSDecl->getType().isVolatileQualified()) | |||
13174 | return; | |||
13175 | if (const ReferenceType *RefTy = LHSDecl->getType()->getAs<ReferenceType>()) | |||
13176 | if (RefTy->getPointeeType().isVolatileQualified()) | |||
13177 | return; | |||
13178 | ||||
13179 | Sema.Diag(Loc, diag::warn_identity_field_assign) << 0; | |||
13180 | } | |||
13181 | ||||
13182 | // Objective-C instance variables | |||
13183 | ObjCIvarRefExpr *OL = dyn_cast<ObjCIvarRefExpr>(LHSExpr); | |||
13184 | ObjCIvarRefExpr *OR = dyn_cast<ObjCIvarRefExpr>(RHSExpr); | |||
13185 | if (OL && OR && OL->getDecl() == OR->getDecl()) { | |||
13186 | DeclRefExpr *RL = dyn_cast<DeclRefExpr>(OL->getBase()->IgnoreImpCasts()); | |||
13187 | DeclRefExpr *RR = dyn_cast<DeclRefExpr>(OR->getBase()->IgnoreImpCasts()); | |||
13188 | if (RL && RR && RL->getDecl() == RR->getDecl()) | |||
13189 | Sema.Diag(Loc, diag::warn_identity_field_assign) << 1; | |||
13190 | } | |||
13191 | } | |||
13192 | ||||
13193 | // C99 6.5.16.1 | |||
13194 | QualType Sema::CheckAssignmentOperands(Expr *LHSExpr, ExprResult &RHS, | |||
13195 | SourceLocation Loc, | |||
13196 | QualType CompoundType) { | |||
13197 | assert(!LHSExpr->hasPlaceholderType(BuiltinType::PseudoObject))(static_cast <bool> (!LHSExpr->hasPlaceholderType(BuiltinType ::PseudoObject)) ? void (0) : __assert_fail ("!LHSExpr->hasPlaceholderType(BuiltinType::PseudoObject)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13197, __extension__ __PRETTY_FUNCTION__)); | |||
13198 | ||||
13199 | // Verify that LHS is a modifiable lvalue, and emit error if not. | |||
13200 | if (CheckForModifiableLvalue(LHSExpr, Loc, *this)) | |||
13201 | return QualType(); | |||
13202 | ||||
13203 | QualType LHSType = LHSExpr->getType(); | |||
13204 | QualType RHSType = CompoundType.isNull() ? RHS.get()->getType() : | |||
13205 | CompoundType; | |||
13206 | // OpenCL v1.2 s6.1.1.1 p2: | |||
13207 | // The half data type can only be used to declare a pointer to a buffer that | |||
13208 | // contains half values | |||
13209 | if (getLangOpts().OpenCL && | |||
13210 | !getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts()) && | |||
13211 | LHSType->isHalfType()) { | |||
13212 | Diag(Loc, diag::err_opencl_half_load_store) << 1 | |||
13213 | << LHSType.getUnqualifiedType(); | |||
13214 | return QualType(); | |||
13215 | } | |||
13216 | ||||
13217 | AssignConvertType ConvTy; | |||
13218 | if (CompoundType.isNull()) { | |||
13219 | Expr *RHSCheck = RHS.get(); | |||
13220 | ||||
13221 | CheckIdentityFieldAssignment(LHSExpr, RHSCheck, Loc, *this); | |||
13222 | ||||
13223 | QualType LHSTy(LHSType); | |||
13224 | ConvTy = CheckSingleAssignmentConstraints(LHSTy, RHS); | |||
13225 | if (RHS.isInvalid()) | |||
13226 | return QualType(); | |||
13227 | // Special case of NSObject attributes on c-style pointer types. | |||
13228 | if (ConvTy == IncompatiblePointer && | |||
13229 | ((Context.isObjCNSObjectType(LHSType) && | |||
13230 | RHSType->isObjCObjectPointerType()) || | |||
13231 | (Context.isObjCNSObjectType(RHSType) && | |||
13232 | LHSType->isObjCObjectPointerType()))) | |||
13233 | ConvTy = Compatible; | |||
13234 | ||||
13235 | if (ConvTy == Compatible && | |||
13236 | LHSType->isObjCObjectType()) | |||
13237 | Diag(Loc, diag::err_objc_object_assignment) | |||
13238 | << LHSType; | |||
13239 | ||||
13240 | // If the RHS is a unary plus or minus, check to see if they = and + are | |||
13241 | // right next to each other. If so, the user may have typo'd "x =+ 4" | |||
13242 | // instead of "x += 4". | |||
13243 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(RHSCheck)) | |||
13244 | RHSCheck = ICE->getSubExpr(); | |||
13245 | if (UnaryOperator *UO = dyn_cast<UnaryOperator>(RHSCheck)) { | |||
13246 | if ((UO->getOpcode() == UO_Plus || UO->getOpcode() == UO_Minus) && | |||
13247 | Loc.isFileID() && UO->getOperatorLoc().isFileID() && | |||
13248 | // Only if the two operators are exactly adjacent. | |||
13249 | Loc.getLocWithOffset(1) == UO->getOperatorLoc() && | |||
13250 | // And there is a space or other character before the subexpr of the | |||
13251 | // unary +/-. We don't want to warn on "x=-1". | |||
13252 | Loc.getLocWithOffset(2) != UO->getSubExpr()->getBeginLoc() && | |||
13253 | UO->getSubExpr()->getBeginLoc().isFileID()) { | |||
13254 | Diag(Loc, diag::warn_not_compound_assign) | |||
13255 | << (UO->getOpcode() == UO_Plus ? "+" : "-") | |||
13256 | << SourceRange(UO->getOperatorLoc(), UO->getOperatorLoc()); | |||
13257 | } | |||
13258 | } | |||
13259 | ||||
13260 | if (ConvTy == Compatible) { | |||
13261 | if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong) { | |||
13262 | // Warn about retain cycles where a block captures the LHS, but | |||
13263 | // not if the LHS is a simple variable into which the block is | |||
13264 | // being stored...unless that variable can be captured by reference! | |||
13265 | const Expr *InnerLHS = LHSExpr->IgnoreParenCasts(); | |||
13266 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InnerLHS); | |||
13267 | if (!DRE || DRE->getDecl()->hasAttr<BlocksAttr>()) | |||
13268 | checkRetainCycles(LHSExpr, RHS.get()); | |||
13269 | } | |||
13270 | ||||
13271 | if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong || | |||
13272 | LHSType.isNonWeakInMRRWithObjCWeak(Context)) { | |||
13273 | // It is safe to assign a weak reference into a strong variable. | |||
13274 | // Although this code can still have problems: | |||
13275 | // id x = self.weakProp; | |||
13276 | // id y = self.weakProp; | |||
13277 | // we do not warn to warn spuriously when 'x' and 'y' are on separate | |||
13278 | // paths through the function. This should be revisited if | |||
13279 | // -Wrepeated-use-of-weak is made flow-sensitive. | |||
13280 | // For ObjCWeak only, we do not warn if the assign is to a non-weak | |||
13281 | // variable, which will be valid for the current autorelease scope. | |||
13282 | if (!Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, | |||
13283 | RHS.get()->getBeginLoc())) | |||
13284 | getCurFunction()->markSafeWeakUse(RHS.get()); | |||
13285 | ||||
13286 | } else if (getLangOpts().ObjCAutoRefCount || getLangOpts().ObjCWeak) { | |||
13287 | checkUnsafeExprAssigns(Loc, LHSExpr, RHS.get()); | |||
13288 | } | |||
13289 | } | |||
13290 | } else { | |||
13291 | // Compound assignment "x += y" | |||
13292 | ConvTy = CheckAssignmentConstraints(Loc, LHSType, RHSType); | |||
13293 | } | |||
13294 | ||||
13295 | if (DiagnoseAssignmentResult(ConvTy, Loc, LHSType, RHSType, | |||
13296 | RHS.get(), AA_Assigning)) | |||
13297 | return QualType(); | |||
13298 | ||||
13299 | CheckForNullPointerDereference(*this, LHSExpr); | |||
13300 | ||||
13301 | if (getLangOpts().CPlusPlus20 && LHSType.isVolatileQualified()) { | |||
13302 | if (CompoundType.isNull()) { | |||
13303 | // C++2a [expr.ass]p5: | |||
13304 | // A simple-assignment whose left operand is of a volatile-qualified | |||
13305 | // type is deprecated unless the assignment is either a discarded-value | |||
13306 | // expression or an unevaluated operand | |||
13307 | ExprEvalContexts.back().VolatileAssignmentLHSs.push_back(LHSExpr); | |||
13308 | } else { | |||
13309 | // C++2a [expr.ass]p6: | |||
13310 | // [Compound-assignment] expressions are deprecated if E1 has | |||
13311 | // volatile-qualified type | |||
13312 | Diag(Loc, diag::warn_deprecated_compound_assign_volatile) << LHSType; | |||
13313 | } | |||
13314 | } | |||
13315 | ||||
13316 | // C99 6.5.16p3: The type of an assignment expression is the type of the | |||
13317 | // left operand unless the left operand has qualified type, in which case | |||
13318 | // it is the unqualified version of the type of the left operand. | |||
13319 | // C99 6.5.16.1p2: In simple assignment, the value of the right operand | |||
13320 | // is converted to the type of the assignment expression (above). | |||
13321 | // C++ 5.17p1: the type of the assignment expression is that of its left | |||
13322 | // operand. | |||
13323 | return (getLangOpts().CPlusPlus | |||
13324 | ? LHSType : LHSType.getUnqualifiedType()); | |||
13325 | } | |||
13326 | ||||
13327 | // Only ignore explicit casts to void. | |||
13328 | static bool IgnoreCommaOperand(const Expr *E) { | |||
13329 | E = E->IgnoreParens(); | |||
13330 | ||||
13331 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { | |||
13332 | if (CE->getCastKind() == CK_ToVoid) { | |||
13333 | return true; | |||
13334 | } | |||
13335 | ||||
13336 | // static_cast<void> on a dependent type will not show up as CK_ToVoid. | |||
13337 | if (CE->getCastKind() == CK_Dependent && E->getType()->isVoidType() && | |||
13338 | CE->getSubExpr()->getType()->isDependentType()) { | |||
13339 | return true; | |||
13340 | } | |||
13341 | } | |||
13342 | ||||
13343 | return false; | |||
13344 | } | |||
13345 | ||||
13346 | // Look for instances where it is likely the comma operator is confused with | |||
13347 | // another operator. There is an explicit list of acceptable expressions for | |||
13348 | // the left hand side of the comma operator, otherwise emit a warning. | |||
13349 | void Sema::DiagnoseCommaOperator(const Expr *LHS, SourceLocation Loc) { | |||
13350 | // No warnings in macros | |||
13351 | if (Loc.isMacroID()) | |||
13352 | return; | |||
13353 | ||||
13354 | // Don't warn in template instantiations. | |||
13355 | if (inTemplateInstantiation()) | |||
13356 | return; | |||
13357 | ||||
13358 | // Scope isn't fine-grained enough to explicitly list the specific cases, so | |||
13359 | // instead, skip more than needed, then call back into here with the | |||
13360 | // CommaVisitor in SemaStmt.cpp. | |||
13361 | // The listed locations are the initialization and increment portions | |||
13362 | // of a for loop. The additional checks are on the condition of | |||
13363 | // if statements, do/while loops, and for loops. | |||
13364 | // Differences in scope flags for C89 mode requires the extra logic. | |||
13365 | const unsigned ForIncrementFlags = | |||
13366 | getLangOpts().C99 || getLangOpts().CPlusPlus | |||
13367 | ? Scope::ControlScope | Scope::ContinueScope | Scope::BreakScope | |||
13368 | : Scope::ContinueScope | Scope::BreakScope; | |||
13369 | const unsigned ForInitFlags = Scope::ControlScope | Scope::DeclScope; | |||
13370 | const unsigned ScopeFlags = getCurScope()->getFlags(); | |||
13371 | if ((ScopeFlags & ForIncrementFlags) == ForIncrementFlags || | |||
13372 | (ScopeFlags & ForInitFlags) == ForInitFlags) | |||
13373 | return; | |||
13374 | ||||
13375 | // If there are multiple comma operators used together, get the RHS of the | |||
13376 | // of the comma operator as the LHS. | |||
13377 | while (const BinaryOperator *BO = dyn_cast<BinaryOperator>(LHS)) { | |||
13378 | if (BO->getOpcode() != BO_Comma) | |||
13379 | break; | |||
13380 | LHS = BO->getRHS(); | |||
13381 | } | |||
13382 | ||||
13383 | // Only allow some expressions on LHS to not warn. | |||
13384 | if (IgnoreCommaOperand(LHS)) | |||
13385 | return; | |||
13386 | ||||
13387 | Diag(Loc, diag::warn_comma_operator); | |||
13388 | Diag(LHS->getBeginLoc(), diag::note_cast_to_void) | |||
13389 | << LHS->getSourceRange() | |||
13390 | << FixItHint::CreateInsertion(LHS->getBeginLoc(), | |||
13391 | LangOpts.CPlusPlus ? "static_cast<void>(" | |||
13392 | : "(void)(") | |||
13393 | << FixItHint::CreateInsertion(PP.getLocForEndOfToken(LHS->getEndLoc()), | |||
13394 | ")"); | |||
13395 | } | |||
13396 | ||||
13397 | // C99 6.5.17 | |||
13398 | static QualType CheckCommaOperands(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
13399 | SourceLocation Loc) { | |||
13400 | LHS = S.CheckPlaceholderExpr(LHS.get()); | |||
13401 | RHS = S.CheckPlaceholderExpr(RHS.get()); | |||
13402 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
13403 | return QualType(); | |||
13404 | ||||
13405 | // C's comma performs lvalue conversion (C99 6.3.2.1) on both its | |||
13406 | // operands, but not unary promotions. | |||
13407 | // C++'s comma does not do any conversions at all (C++ [expr.comma]p1). | |||
13408 | ||||
13409 | // So we treat the LHS as a ignored value, and in C++ we allow the | |||
13410 | // containing site to determine what should be done with the RHS. | |||
13411 | LHS = S.IgnoredValueConversions(LHS.get()); | |||
13412 | if (LHS.isInvalid()) | |||
13413 | return QualType(); | |||
13414 | ||||
13415 | S.DiagnoseUnusedExprResult(LHS.get()); | |||
13416 | ||||
13417 | if (!S.getLangOpts().CPlusPlus) { | |||
13418 | RHS = S.DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
13419 | if (RHS.isInvalid()) | |||
13420 | return QualType(); | |||
13421 | if (!RHS.get()->getType()->isVoidType()) | |||
13422 | S.RequireCompleteType(Loc, RHS.get()->getType(), | |||
13423 | diag::err_incomplete_type); | |||
13424 | } | |||
13425 | ||||
13426 | if (!S.getDiagnostics().isIgnored(diag::warn_comma_operator, Loc)) | |||
13427 | S.DiagnoseCommaOperator(LHS.get(), Loc); | |||
13428 | ||||
13429 | return RHS.get()->getType(); | |||
13430 | } | |||
13431 | ||||
13432 | /// CheckIncrementDecrementOperand - unlike most "Check" methods, this routine | |||
13433 | /// doesn't need to call UsualUnaryConversions or UsualArithmeticConversions. | |||
13434 | static QualType CheckIncrementDecrementOperand(Sema &S, Expr *Op, | |||
13435 | ExprValueKind &VK, | |||
13436 | ExprObjectKind &OK, | |||
13437 | SourceLocation OpLoc, | |||
13438 | bool IsInc, bool IsPrefix) { | |||
13439 | if (Op->isTypeDependent()) | |||
13440 | return S.Context.DependentTy; | |||
13441 | ||||
13442 | QualType ResType = Op->getType(); | |||
13443 | // Atomic types can be used for increment / decrement where the non-atomic | |||
13444 | // versions can, so ignore the _Atomic() specifier for the purpose of | |||
13445 | // checking. | |||
13446 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
13447 | ResType = ResAtomicType->getValueType(); | |||
13448 | ||||
13449 | assert(!ResType.isNull() && "no type for increment/decrement expression")(static_cast <bool> (!ResType.isNull() && "no type for increment/decrement expression" ) ? void (0) : __assert_fail ("!ResType.isNull() && \"no type for increment/decrement expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13449, __extension__ __PRETTY_FUNCTION__)); | |||
13450 | ||||
13451 | if (S.getLangOpts().CPlusPlus && ResType->isBooleanType()) { | |||
13452 | // Decrement of bool is not allowed. | |||
13453 | if (!IsInc) { | |||
13454 | S.Diag(OpLoc, diag::err_decrement_bool) << Op->getSourceRange(); | |||
13455 | return QualType(); | |||
13456 | } | |||
13457 | // Increment of bool sets it to true, but is deprecated. | |||
13458 | S.Diag(OpLoc, S.getLangOpts().CPlusPlus17 ? diag::ext_increment_bool | |||
13459 | : diag::warn_increment_bool) | |||
13460 | << Op->getSourceRange(); | |||
13461 | } else if (S.getLangOpts().CPlusPlus && ResType->isEnumeralType()) { | |||
13462 | // Error on enum increments and decrements in C++ mode | |||
13463 | S.Diag(OpLoc, diag::err_increment_decrement_enum) << IsInc << ResType; | |||
13464 | return QualType(); | |||
13465 | } else if (ResType->isRealType()) { | |||
13466 | // OK! | |||
13467 | } else if (ResType->isPointerType()) { | |||
13468 | // C99 6.5.2.4p2, 6.5.6p2 | |||
13469 | if (!checkArithmeticOpPointerOperand(S, OpLoc, Op)) | |||
13470 | return QualType(); | |||
13471 | } else if (ResType->isObjCObjectPointerType()) { | |||
13472 | // On modern runtimes, ObjC pointer arithmetic is forbidden. | |||
13473 | // Otherwise, we just need a complete type. | |||
13474 | if (checkArithmeticIncompletePointerType(S, OpLoc, Op) || | |||
13475 | checkArithmeticOnObjCPointer(S, OpLoc, Op)) | |||
13476 | return QualType(); | |||
13477 | } else if (ResType->isAnyComplexType()) { | |||
13478 | // C99 does not support ++/-- on complex types, we allow as an extension. | |||
13479 | S.Diag(OpLoc, diag::ext_integer_increment_complex) | |||
13480 | << ResType << Op->getSourceRange(); | |||
13481 | } else if (ResType->isPlaceholderType()) { | |||
13482 | ExprResult PR = S.CheckPlaceholderExpr(Op); | |||
13483 | if (PR.isInvalid()) return QualType(); | |||
13484 | return CheckIncrementDecrementOperand(S, PR.get(), VK, OK, OpLoc, | |||
13485 | IsInc, IsPrefix); | |||
13486 | } else if (S.getLangOpts().AltiVec && ResType->isVectorType()) { | |||
13487 | // OK! ( C/C++ Language Extensions for CBEA(Version 2.6) 10.3 ) | |||
13488 | } else if (S.getLangOpts().ZVector && ResType->isVectorType() && | |||
13489 | (ResType->castAs<VectorType>()->getVectorKind() != | |||
13490 | VectorType::AltiVecBool)) { | |||
13491 | // The z vector extensions allow ++ and -- for non-bool vectors. | |||
13492 | } else if(S.getLangOpts().OpenCL && ResType->isVectorType() && | |||
13493 | ResType->castAs<VectorType>()->getElementType()->isIntegerType()) { | |||
13494 | // OpenCL V1.2 6.3 says dec/inc ops operate on integer vector types. | |||
13495 | } else { | |||
13496 | S.Diag(OpLoc, diag::err_typecheck_illegal_increment_decrement) | |||
13497 | << ResType << int(IsInc) << Op->getSourceRange(); | |||
13498 | return QualType(); | |||
13499 | } | |||
13500 | // At this point, we know we have a real, complex or pointer type. | |||
13501 | // Now make sure the operand is a modifiable lvalue. | |||
13502 | if (CheckForModifiableLvalue(Op, OpLoc, S)) | |||
13503 | return QualType(); | |||
13504 | if (S.getLangOpts().CPlusPlus20 && ResType.isVolatileQualified()) { | |||
13505 | // C++2a [expr.pre.inc]p1, [expr.post.inc]p1: | |||
13506 | // An operand with volatile-qualified type is deprecated | |||
13507 | S.Diag(OpLoc, diag::warn_deprecated_increment_decrement_volatile) | |||
13508 | << IsInc << ResType; | |||
13509 | } | |||
13510 | // In C++, a prefix increment is the same type as the operand. Otherwise | |||
13511 | // (in C or with postfix), the increment is the unqualified type of the | |||
13512 | // operand. | |||
13513 | if (IsPrefix && S.getLangOpts().CPlusPlus) { | |||
13514 | VK = VK_LValue; | |||
13515 | OK = Op->getObjectKind(); | |||
13516 | return ResType; | |||
13517 | } else { | |||
13518 | VK = VK_PRValue; | |||
13519 | return ResType.getUnqualifiedType(); | |||
13520 | } | |||
13521 | } | |||
13522 | ||||
13523 | ||||
13524 | /// getPrimaryDecl - Helper function for CheckAddressOfOperand(). | |||
13525 | /// This routine allows us to typecheck complex/recursive expressions | |||
13526 | /// where the declaration is needed for type checking. We only need to | |||
13527 | /// handle cases when the expression references a function designator | |||
13528 | /// or is an lvalue. Here are some examples: | |||
13529 | /// - &(x) => x | |||
13530 | /// - &*****f => f for f a function designator. | |||
13531 | /// - &s.xx => s | |||
13532 | /// - &s.zz[1].yy -> s, if zz is an array | |||
13533 | /// - *(x + 1) -> x, if x is an array | |||
13534 | /// - &"123"[2] -> 0 | |||
13535 | /// - & __real__ x -> x | |||
13536 | /// | |||
13537 | /// FIXME: We don't recurse to the RHS of a comma, nor handle pointers to | |||
13538 | /// members. | |||
13539 | static ValueDecl *getPrimaryDecl(Expr *E) { | |||
13540 | switch (E->getStmtClass()) { | |||
13541 | case Stmt::DeclRefExprClass: | |||
13542 | return cast<DeclRefExpr>(E)->getDecl(); | |||
13543 | case Stmt::MemberExprClass: | |||
13544 | // If this is an arrow operator, the address is an offset from | |||
13545 | // the base's value, so the object the base refers to is | |||
13546 | // irrelevant. | |||
13547 | if (cast<MemberExpr>(E)->isArrow()) | |||
13548 | return nullptr; | |||
13549 | // Otherwise, the expression refers to a part of the base | |||
13550 | return getPrimaryDecl(cast<MemberExpr>(E)->getBase()); | |||
13551 | case Stmt::ArraySubscriptExprClass: { | |||
13552 | // FIXME: This code shouldn't be necessary! We should catch the implicit | |||
13553 | // promotion of register arrays earlier. | |||
13554 | Expr* Base = cast<ArraySubscriptExpr>(E)->getBase(); | |||
13555 | if (ImplicitCastExpr* ICE = dyn_cast<ImplicitCastExpr>(Base)) { | |||
13556 | if (ICE->getSubExpr()->getType()->isArrayType()) | |||
13557 | return getPrimaryDecl(ICE->getSubExpr()); | |||
13558 | } | |||
13559 | return nullptr; | |||
13560 | } | |||
13561 | case Stmt::UnaryOperatorClass: { | |||
13562 | UnaryOperator *UO = cast<UnaryOperator>(E); | |||
13563 | ||||
13564 | switch(UO->getOpcode()) { | |||
13565 | case UO_Real: | |||
13566 | case UO_Imag: | |||
13567 | case UO_Extension: | |||
13568 | return getPrimaryDecl(UO->getSubExpr()); | |||
13569 | default: | |||
13570 | return nullptr; | |||
13571 | } | |||
13572 | } | |||
13573 | case Stmt::ParenExprClass: | |||
13574 | return getPrimaryDecl(cast<ParenExpr>(E)->getSubExpr()); | |||
13575 | case Stmt::ImplicitCastExprClass: | |||
13576 | // If the result of an implicit cast is an l-value, we care about | |||
13577 | // the sub-expression; otherwise, the result here doesn't matter. | |||
13578 | return getPrimaryDecl(cast<ImplicitCastExpr>(E)->getSubExpr()); | |||
13579 | case Stmt::CXXUuidofExprClass: | |||
13580 | return cast<CXXUuidofExpr>(E)->getGuidDecl(); | |||
13581 | default: | |||
13582 | return nullptr; | |||
13583 | } | |||
13584 | } | |||
13585 | ||||
13586 | namespace { | |||
13587 | enum { | |||
13588 | AO_Bit_Field = 0, | |||
13589 | AO_Vector_Element = 1, | |||
13590 | AO_Property_Expansion = 2, | |||
13591 | AO_Register_Variable = 3, | |||
13592 | AO_Matrix_Element = 4, | |||
13593 | AO_No_Error = 5 | |||
13594 | }; | |||
13595 | } | |||
13596 | /// Diagnose invalid operand for address of operations. | |||
13597 | /// | |||
13598 | /// \param Type The type of operand which cannot have its address taken. | |||
13599 | static void diagnoseAddressOfInvalidType(Sema &S, SourceLocation Loc, | |||
13600 | Expr *E, unsigned Type) { | |||
13601 | S.Diag(Loc, diag::err_typecheck_address_of) << Type << E->getSourceRange(); | |||
13602 | } | |||
13603 | ||||
13604 | /// CheckAddressOfOperand - The operand of & must be either a function | |||
13605 | /// designator or an lvalue designating an object. If it is an lvalue, the | |||
13606 | /// object cannot be declared with storage class register or be a bit field. | |||
13607 | /// Note: The usual conversions are *not* applied to the operand of the & | |||
13608 | /// operator (C99 6.3.2.1p[2-4]), and its result is never an lvalue. | |||
13609 | /// In C++, the operand might be an overloaded function name, in which case | |||
13610 | /// we allow the '&' but retain the overloaded-function type. | |||
13611 | QualType Sema::CheckAddressOfOperand(ExprResult &OrigOp, SourceLocation OpLoc) { | |||
13612 | if (const BuiltinType *PTy = OrigOp.get()->getType()->getAsPlaceholderType()){ | |||
13613 | if (PTy->getKind() == BuiltinType::Overload) { | |||
13614 | Expr *E = OrigOp.get()->IgnoreParens(); | |||
13615 | if (!isa<OverloadExpr>(E)) { | |||
13616 | assert(cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf)(static_cast <bool> (cast<UnaryOperator>(E)->getOpcode () == UO_AddrOf) ? void (0) : __assert_fail ("cast<UnaryOperator>(E)->getOpcode() == UO_AddrOf" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13616, __extension__ __PRETTY_FUNCTION__)); | |||
13617 | Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof_addrof_function) | |||
13618 | << OrigOp.get()->getSourceRange(); | |||
13619 | return QualType(); | |||
13620 | } | |||
13621 | ||||
13622 | OverloadExpr *Ovl = cast<OverloadExpr>(E); | |||
13623 | if (isa<UnresolvedMemberExpr>(Ovl)) | |||
13624 | if (!ResolveSingleFunctionTemplateSpecialization(Ovl)) { | |||
13625 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
13626 | << OrigOp.get()->getSourceRange(); | |||
13627 | return QualType(); | |||
13628 | } | |||
13629 | ||||
13630 | return Context.OverloadTy; | |||
13631 | } | |||
13632 | ||||
13633 | if (PTy->getKind() == BuiltinType::UnknownAny) | |||
13634 | return Context.UnknownAnyTy; | |||
13635 | ||||
13636 | if (PTy->getKind() == BuiltinType::BoundMember) { | |||
13637 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
13638 | << OrigOp.get()->getSourceRange(); | |||
13639 | return QualType(); | |||
13640 | } | |||
13641 | ||||
13642 | OrigOp = CheckPlaceholderExpr(OrigOp.get()); | |||
13643 | if (OrigOp.isInvalid()) return QualType(); | |||
13644 | } | |||
13645 | ||||
13646 | if (OrigOp.get()->isTypeDependent()) | |||
13647 | return Context.DependentTy; | |||
13648 | ||||
13649 | assert(!OrigOp.get()->getType()->isPlaceholderType())(static_cast <bool> (!OrigOp.get()->getType()->isPlaceholderType ()) ? void (0) : __assert_fail ("!OrigOp.get()->getType()->isPlaceholderType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13649, __extension__ __PRETTY_FUNCTION__)); | |||
13650 | ||||
13651 | // Make sure to ignore parentheses in subsequent checks | |||
13652 | Expr *op = OrigOp.get()->IgnoreParens(); | |||
13653 | ||||
13654 | // In OpenCL captures for blocks called as lambda functions | |||
13655 | // are located in the private address space. Blocks used in | |||
13656 | // enqueue_kernel can be located in a different address space | |||
13657 | // depending on a vendor implementation. Thus preventing | |||
13658 | // taking an address of the capture to avoid invalid AS casts. | |||
13659 | if (LangOpts.OpenCL) { | |||
13660 | auto* VarRef = dyn_cast<DeclRefExpr>(op); | |||
13661 | if (VarRef && VarRef->refersToEnclosingVariableOrCapture()) { | |||
13662 | Diag(op->getExprLoc(), diag::err_opencl_taking_address_capture); | |||
13663 | return QualType(); | |||
13664 | } | |||
13665 | } | |||
13666 | ||||
13667 | if (getLangOpts().C99) { | |||
13668 | // Implement C99-only parts of addressof rules. | |||
13669 | if (UnaryOperator* uOp = dyn_cast<UnaryOperator>(op)) { | |||
13670 | if (uOp->getOpcode() == UO_Deref) | |||
13671 | // Per C99 6.5.3.2, the address of a deref always returns a valid result | |||
13672 | // (assuming the deref expression is valid). | |||
13673 | return uOp->getSubExpr()->getType(); | |||
13674 | } | |||
13675 | // Technically, there should be a check for array subscript | |||
13676 | // expressions here, but the result of one is always an lvalue anyway. | |||
13677 | } | |||
13678 | ValueDecl *dcl = getPrimaryDecl(op); | |||
13679 | ||||
13680 | if (auto *FD = dyn_cast_or_null<FunctionDecl>(dcl)) | |||
13681 | if (!checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | |||
13682 | op->getBeginLoc())) | |||
13683 | return QualType(); | |||
13684 | ||||
13685 | Expr::LValueClassification lval = op->ClassifyLValue(Context); | |||
13686 | unsigned AddressOfError = AO_No_Error; | |||
13687 | ||||
13688 | if (lval == Expr::LV_ClassTemporary || lval == Expr::LV_ArrayTemporary) { | |||
13689 | bool sfinae = (bool)isSFINAEContext(); | |||
13690 | Diag(OpLoc, isSFINAEContext() ? diag::err_typecheck_addrof_temporary | |||
13691 | : diag::ext_typecheck_addrof_temporary) | |||
13692 | << op->getType() << op->getSourceRange(); | |||
13693 | if (sfinae) | |||
13694 | return QualType(); | |||
13695 | // Materialize the temporary as an lvalue so that we can take its address. | |||
13696 | OrigOp = op = | |||
13697 | CreateMaterializeTemporaryExpr(op->getType(), OrigOp.get(), true); | |||
13698 | } else if (isa<ObjCSelectorExpr>(op)) { | |||
13699 | return Context.getPointerType(op->getType()); | |||
13700 | } else if (lval == Expr::LV_MemberFunction) { | |||
13701 | // If it's an instance method, make a member pointer. | |||
13702 | // The expression must have exactly the form &A::foo. | |||
13703 | ||||
13704 | // If the underlying expression isn't a decl ref, give up. | |||
13705 | if (!isa<DeclRefExpr>(op)) { | |||
13706 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
13707 | << OrigOp.get()->getSourceRange(); | |||
13708 | return QualType(); | |||
13709 | } | |||
13710 | DeclRefExpr *DRE = cast<DeclRefExpr>(op); | |||
13711 | CXXMethodDecl *MD = cast<CXXMethodDecl>(DRE->getDecl()); | |||
13712 | ||||
13713 | // The id-expression was parenthesized. | |||
13714 | if (OrigOp.get() != DRE) { | |||
13715 | Diag(OpLoc, diag::err_parens_pointer_member_function) | |||
13716 | << OrigOp.get()->getSourceRange(); | |||
13717 | ||||
13718 | // The method was named without a qualifier. | |||
13719 | } else if (!DRE->getQualifier()) { | |||
13720 | if (MD->getParent()->getName().empty()) | |||
13721 | Diag(OpLoc, diag::err_unqualified_pointer_member_function) | |||
13722 | << op->getSourceRange(); | |||
13723 | else { | |||
13724 | SmallString<32> Str; | |||
13725 | StringRef Qual = (MD->getParent()->getName() + "::").toStringRef(Str); | |||
13726 | Diag(OpLoc, diag::err_unqualified_pointer_member_function) | |||
13727 | << op->getSourceRange() | |||
13728 | << FixItHint::CreateInsertion(op->getSourceRange().getBegin(), Qual); | |||
13729 | } | |||
13730 | } | |||
13731 | ||||
13732 | // Taking the address of a dtor is illegal per C++ [class.dtor]p2. | |||
13733 | if (isa<CXXDestructorDecl>(MD)) | |||
13734 | Diag(OpLoc, diag::err_typecheck_addrof_dtor) << op->getSourceRange(); | |||
13735 | ||||
13736 | QualType MPTy = Context.getMemberPointerType( | |||
13737 | op->getType(), Context.getTypeDeclType(MD->getParent()).getTypePtr()); | |||
13738 | // Under the MS ABI, lock down the inheritance model now. | |||
13739 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
13740 | (void)isCompleteType(OpLoc, MPTy); | |||
13741 | return MPTy; | |||
13742 | } else if (lval != Expr::LV_Valid && lval != Expr::LV_IncompleteVoidType) { | |||
13743 | // C99 6.5.3.2p1 | |||
13744 | // The operand must be either an l-value or a function designator | |||
13745 | if (!op->getType()->isFunctionType()) { | |||
13746 | // Use a special diagnostic for loads from property references. | |||
13747 | if (isa<PseudoObjectExpr>(op)) { | |||
13748 | AddressOfError = AO_Property_Expansion; | |||
13749 | } else { | |||
13750 | Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof) | |||
13751 | << op->getType() << op->getSourceRange(); | |||
13752 | return QualType(); | |||
13753 | } | |||
13754 | } | |||
13755 | } else if (op->getObjectKind() == OK_BitField) { // C99 6.5.3.2p1 | |||
13756 | // The operand cannot be a bit-field | |||
13757 | AddressOfError = AO_Bit_Field; | |||
13758 | } else if (op->getObjectKind() == OK_VectorComponent) { | |||
13759 | // The operand cannot be an element of a vector | |||
13760 | AddressOfError = AO_Vector_Element; | |||
13761 | } else if (op->getObjectKind() == OK_MatrixComponent) { | |||
13762 | // The operand cannot be an element of a matrix. | |||
13763 | AddressOfError = AO_Matrix_Element; | |||
13764 | } else if (dcl) { // C99 6.5.3.2p1 | |||
13765 | // We have an lvalue with a decl. Make sure the decl is not declared | |||
13766 | // with the register storage-class specifier. | |||
13767 | if (const VarDecl *vd = dyn_cast<VarDecl>(dcl)) { | |||
13768 | // in C++ it is not error to take address of a register | |||
13769 | // variable (c++03 7.1.1P3) | |||
13770 | if (vd->getStorageClass() == SC_Register && | |||
13771 | !getLangOpts().CPlusPlus) { | |||
13772 | AddressOfError = AO_Register_Variable; | |||
13773 | } | |||
13774 | } else if (isa<MSPropertyDecl>(dcl)) { | |||
13775 | AddressOfError = AO_Property_Expansion; | |||
13776 | } else if (isa<FunctionTemplateDecl>(dcl)) { | |||
13777 | return Context.OverloadTy; | |||
13778 | } else if (isa<FieldDecl>(dcl) || isa<IndirectFieldDecl>(dcl)) { | |||
13779 | // Okay: we can take the address of a field. | |||
13780 | // Could be a pointer to member, though, if there is an explicit | |||
13781 | // scope qualifier for the class. | |||
13782 | if (isa<DeclRefExpr>(op) && cast<DeclRefExpr>(op)->getQualifier()) { | |||
13783 | DeclContext *Ctx = dcl->getDeclContext(); | |||
13784 | if (Ctx && Ctx->isRecord()) { | |||
13785 | if (dcl->getType()->isReferenceType()) { | |||
13786 | Diag(OpLoc, | |||
13787 | diag::err_cannot_form_pointer_to_member_of_reference_type) | |||
13788 | << dcl->getDeclName() << dcl->getType(); | |||
13789 | return QualType(); | |||
13790 | } | |||
13791 | ||||
13792 | while (cast<RecordDecl>(Ctx)->isAnonymousStructOrUnion()) | |||
13793 | Ctx = Ctx->getParent(); | |||
13794 | ||||
13795 | QualType MPTy = Context.getMemberPointerType( | |||
13796 | op->getType(), | |||
13797 | Context.getTypeDeclType(cast<RecordDecl>(Ctx)).getTypePtr()); | |||
13798 | // Under the MS ABI, lock down the inheritance model now. | |||
13799 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
13800 | (void)isCompleteType(OpLoc, MPTy); | |||
13801 | return MPTy; | |||
13802 | } | |||
13803 | } | |||
13804 | } else if (!isa<FunctionDecl>(dcl) && !isa<NonTypeTemplateParmDecl>(dcl) && | |||
13805 | !isa<BindingDecl>(dcl) && !isa<MSGuidDecl>(dcl)) | |||
13806 | llvm_unreachable("Unknown/unexpected decl type")::llvm::llvm_unreachable_internal("Unknown/unexpected decl type" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13806); | |||
13807 | } | |||
13808 | ||||
13809 | if (AddressOfError != AO_No_Error) { | |||
13810 | diagnoseAddressOfInvalidType(*this, OpLoc, op, AddressOfError); | |||
13811 | return QualType(); | |||
13812 | } | |||
13813 | ||||
13814 | if (lval == Expr::LV_IncompleteVoidType) { | |||
13815 | // Taking the address of a void variable is technically illegal, but we | |||
13816 | // allow it in cases which are otherwise valid. | |||
13817 | // Example: "extern void x; void* y = &x;". | |||
13818 | Diag(OpLoc, diag::ext_typecheck_addrof_void) << op->getSourceRange(); | |||
13819 | } | |||
13820 | ||||
13821 | // If the operand has type "type", the result has type "pointer to type". | |||
13822 | if (op->getType()->isObjCObjectType()) | |||
13823 | return Context.getObjCObjectPointerType(op->getType()); | |||
13824 | ||||
13825 | CheckAddressOfPackedMember(op); | |||
13826 | ||||
13827 | return Context.getPointerType(op->getType()); | |||
13828 | } | |||
13829 | ||||
13830 | static void RecordModifiableNonNullParam(Sema &S, const Expr *Exp) { | |||
13831 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Exp); | |||
13832 | if (!DRE) | |||
13833 | return; | |||
13834 | const Decl *D = DRE->getDecl(); | |||
13835 | if (!D) | |||
13836 | return; | |||
13837 | const ParmVarDecl *Param = dyn_cast<ParmVarDecl>(D); | |||
13838 | if (!Param) | |||
13839 | return; | |||
13840 | if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(Param->getDeclContext())) | |||
13841 | if (!FD->hasAttr<NonNullAttr>() && !Param->hasAttr<NonNullAttr>()) | |||
13842 | return; | |||
13843 | if (FunctionScopeInfo *FD = S.getCurFunction()) | |||
13844 | if (!FD->ModifiedNonNullParams.count(Param)) | |||
13845 | FD->ModifiedNonNullParams.insert(Param); | |||
13846 | } | |||
13847 | ||||
13848 | /// CheckIndirectionOperand - Type check unary indirection (prefix '*'). | |||
13849 | static QualType CheckIndirectionOperand(Sema &S, Expr *Op, ExprValueKind &VK, | |||
13850 | SourceLocation OpLoc) { | |||
13851 | if (Op->isTypeDependent()) | |||
13852 | return S.Context.DependentTy; | |||
13853 | ||||
13854 | ExprResult ConvResult = S.UsualUnaryConversions(Op); | |||
13855 | if (ConvResult.isInvalid()) | |||
13856 | return QualType(); | |||
13857 | Op = ConvResult.get(); | |||
13858 | QualType OpTy = Op->getType(); | |||
13859 | QualType Result; | |||
13860 | ||||
13861 | if (isa<CXXReinterpretCastExpr>(Op)) { | |||
13862 | QualType OpOrigType = Op->IgnoreParenCasts()->getType(); | |||
13863 | S.CheckCompatibleReinterpretCast(OpOrigType, OpTy, /*IsDereference*/true, | |||
13864 | Op->getSourceRange()); | |||
13865 | } | |||
13866 | ||||
13867 | if (const PointerType *PT = OpTy->getAs<PointerType>()) | |||
13868 | { | |||
13869 | Result = PT->getPointeeType(); | |||
13870 | } | |||
13871 | else if (const ObjCObjectPointerType *OPT = | |||
13872 | OpTy->getAs<ObjCObjectPointerType>()) | |||
13873 | Result = OPT->getPointeeType(); | |||
13874 | else { | |||
13875 | ExprResult PR = S.CheckPlaceholderExpr(Op); | |||
13876 | if (PR.isInvalid()) return QualType(); | |||
13877 | if (PR.get() != Op) | |||
13878 | return CheckIndirectionOperand(S, PR.get(), VK, OpLoc); | |||
13879 | } | |||
13880 | ||||
13881 | if (Result.isNull()) { | |||
13882 | S.Diag(OpLoc, diag::err_typecheck_indirection_requires_pointer) | |||
13883 | << OpTy << Op->getSourceRange(); | |||
13884 | return QualType(); | |||
13885 | } | |||
13886 | ||||
13887 | // Note that per both C89 and C99, indirection is always legal, even if Result | |||
13888 | // is an incomplete type or void. It would be possible to warn about | |||
13889 | // dereferencing a void pointer, but it's completely well-defined, and such a | |||
13890 | // warning is unlikely to catch any mistakes. In C++, indirection is not valid | |||
13891 | // for pointers to 'void' but is fine for any other pointer type: | |||
13892 | // | |||
13893 | // C++ [expr.unary.op]p1: | |||
13894 | // [...] the expression to which [the unary * operator] is applied shall | |||
13895 | // be a pointer to an object type, or a pointer to a function type | |||
13896 | if (S.getLangOpts().CPlusPlus && Result->isVoidType()) | |||
13897 | S.Diag(OpLoc, diag::ext_typecheck_indirection_through_void_pointer) | |||
13898 | << OpTy << Op->getSourceRange(); | |||
13899 | ||||
13900 | // Dereferences are usually l-values... | |||
13901 | VK = VK_LValue; | |||
13902 | ||||
13903 | // ...except that certain expressions are never l-values in C. | |||
13904 | if (!S.getLangOpts().CPlusPlus && Result.isCForbiddenLValueType()) | |||
13905 | VK = VK_PRValue; | |||
13906 | ||||
13907 | return Result; | |||
13908 | } | |||
13909 | ||||
13910 | BinaryOperatorKind Sema::ConvertTokenKindToBinaryOpcode(tok::TokenKind Kind) { | |||
13911 | BinaryOperatorKind Opc; | |||
13912 | switch (Kind) { | |||
13913 | default: llvm_unreachable("Unknown binop!")::llvm::llvm_unreachable_internal("Unknown binop!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13913); | |||
13914 | case tok::periodstar: Opc = BO_PtrMemD; break; | |||
13915 | case tok::arrowstar: Opc = BO_PtrMemI; break; | |||
13916 | case tok::star: Opc = BO_Mul; break; | |||
13917 | case tok::slash: Opc = BO_Div; break; | |||
13918 | case tok::percent: Opc = BO_Rem; break; | |||
13919 | case tok::plus: Opc = BO_Add; break; | |||
13920 | case tok::minus: Opc = BO_Sub; break; | |||
13921 | case tok::lessless: Opc = BO_Shl; break; | |||
13922 | case tok::greatergreater: Opc = BO_Shr; break; | |||
13923 | case tok::lessequal: Opc = BO_LE; break; | |||
13924 | case tok::less: Opc = BO_LT; break; | |||
13925 | case tok::greaterequal: Opc = BO_GE; break; | |||
13926 | case tok::greater: Opc = BO_GT; break; | |||
13927 | case tok::exclaimequal: Opc = BO_NE; break; | |||
13928 | case tok::equalequal: Opc = BO_EQ; break; | |||
13929 | case tok::spaceship: Opc = BO_Cmp; break; | |||
13930 | case tok::amp: Opc = BO_And; break; | |||
13931 | case tok::caret: Opc = BO_Xor; break; | |||
13932 | case tok::pipe: Opc = BO_Or; break; | |||
13933 | case tok::ampamp: Opc = BO_LAnd; break; | |||
13934 | case tok::pipepipe: Opc = BO_LOr; break; | |||
13935 | case tok::equal: Opc = BO_Assign; break; | |||
13936 | case tok::starequal: Opc = BO_MulAssign; break; | |||
13937 | case tok::slashequal: Opc = BO_DivAssign; break; | |||
13938 | case tok::percentequal: Opc = BO_RemAssign; break; | |||
13939 | case tok::plusequal: Opc = BO_AddAssign; break; | |||
13940 | case tok::minusequal: Opc = BO_SubAssign; break; | |||
13941 | case tok::lesslessequal: Opc = BO_ShlAssign; break; | |||
13942 | case tok::greatergreaterequal: Opc = BO_ShrAssign; break; | |||
13943 | case tok::ampequal: Opc = BO_AndAssign; break; | |||
13944 | case tok::caretequal: Opc = BO_XorAssign; break; | |||
13945 | case tok::pipeequal: Opc = BO_OrAssign; break; | |||
13946 | case tok::comma: Opc = BO_Comma; break; | |||
13947 | } | |||
13948 | return Opc; | |||
13949 | } | |||
13950 | ||||
13951 | static inline UnaryOperatorKind ConvertTokenKindToUnaryOpcode( | |||
13952 | tok::TokenKind Kind) { | |||
13953 | UnaryOperatorKind Opc; | |||
13954 | switch (Kind) { | |||
13955 | default: llvm_unreachable("Unknown unary op!")::llvm::llvm_unreachable_internal("Unknown unary op!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 13955); | |||
13956 | case tok::plusplus: Opc = UO_PreInc; break; | |||
13957 | case tok::minusminus: Opc = UO_PreDec; break; | |||
13958 | case tok::amp: Opc = UO_AddrOf; break; | |||
13959 | case tok::star: Opc = UO_Deref; break; | |||
13960 | case tok::plus: Opc = UO_Plus; break; | |||
13961 | case tok::minus: Opc = UO_Minus; break; | |||
13962 | case tok::tilde: Opc = UO_Not; break; | |||
13963 | case tok::exclaim: Opc = UO_LNot; break; | |||
13964 | case tok::kw___real: Opc = UO_Real; break; | |||
13965 | case tok::kw___imag: Opc = UO_Imag; break; | |||
13966 | case tok::kw___extension__: Opc = UO_Extension; break; | |||
13967 | } | |||
13968 | return Opc; | |||
13969 | } | |||
13970 | ||||
13971 | /// DiagnoseSelfAssignment - Emits a warning if a value is assigned to itself. | |||
13972 | /// This warning suppressed in the event of macro expansions. | |||
13973 | static void DiagnoseSelfAssignment(Sema &S, Expr *LHSExpr, Expr *RHSExpr, | |||
13974 | SourceLocation OpLoc, bool IsBuiltin) { | |||
13975 | if (S.inTemplateInstantiation()) | |||
13976 | return; | |||
13977 | if (S.isUnevaluatedContext()) | |||
13978 | return; | |||
13979 | if (OpLoc.isInvalid() || OpLoc.isMacroID()) | |||
13980 | return; | |||
13981 | LHSExpr = LHSExpr->IgnoreParenImpCasts(); | |||
13982 | RHSExpr = RHSExpr->IgnoreParenImpCasts(); | |||
13983 | const DeclRefExpr *LHSDeclRef = dyn_cast<DeclRefExpr>(LHSExpr); | |||
13984 | const DeclRefExpr *RHSDeclRef = dyn_cast<DeclRefExpr>(RHSExpr); | |||
13985 | if (!LHSDeclRef || !RHSDeclRef || | |||
13986 | LHSDeclRef->getLocation().isMacroID() || | |||
13987 | RHSDeclRef->getLocation().isMacroID()) | |||
13988 | return; | |||
13989 | const ValueDecl *LHSDecl = | |||
13990 | cast<ValueDecl>(LHSDeclRef->getDecl()->getCanonicalDecl()); | |||
13991 | const ValueDecl *RHSDecl = | |||
13992 | cast<ValueDecl>(RHSDeclRef->getDecl()->getCanonicalDecl()); | |||
13993 | if (LHSDecl != RHSDecl) | |||
13994 | return; | |||
13995 | if (LHSDecl->getType().isVolatileQualified()) | |||
13996 | return; | |||
13997 | if (const ReferenceType *RefTy = LHSDecl->getType()->getAs<ReferenceType>()) | |||
13998 | if (RefTy->getPointeeType().isVolatileQualified()) | |||
13999 | return; | |||
14000 | ||||
14001 | S.Diag(OpLoc, IsBuiltin ? diag::warn_self_assignment_builtin | |||
14002 | : diag::warn_self_assignment_overloaded) | |||
14003 | << LHSDeclRef->getType() << LHSExpr->getSourceRange() | |||
14004 | << RHSExpr->getSourceRange(); | |||
14005 | } | |||
14006 | ||||
14007 | /// Check if a bitwise-& is performed on an Objective-C pointer. This | |||
14008 | /// is usually indicative of introspection within the Objective-C pointer. | |||
14009 | static void checkObjCPointerIntrospection(Sema &S, ExprResult &L, ExprResult &R, | |||
14010 | SourceLocation OpLoc) { | |||
14011 | if (!S.getLangOpts().ObjC) | |||
14012 | return; | |||
14013 | ||||
14014 | const Expr *ObjCPointerExpr = nullptr, *OtherExpr = nullptr; | |||
14015 | const Expr *LHS = L.get(); | |||
14016 | const Expr *RHS = R.get(); | |||
14017 | ||||
14018 | if (LHS->IgnoreParenCasts()->getType()->isObjCObjectPointerType()) { | |||
14019 | ObjCPointerExpr = LHS; | |||
14020 | OtherExpr = RHS; | |||
14021 | } | |||
14022 | else if (RHS->IgnoreParenCasts()->getType()->isObjCObjectPointerType()) { | |||
14023 | ObjCPointerExpr = RHS; | |||
14024 | OtherExpr = LHS; | |||
14025 | } | |||
14026 | ||||
14027 | // This warning is deliberately made very specific to reduce false | |||
14028 | // positives with logic that uses '&' for hashing. This logic mainly | |||
14029 | // looks for code trying to introspect into tagged pointers, which | |||
14030 | // code should generally never do. | |||
14031 | if (ObjCPointerExpr && isa<IntegerLiteral>(OtherExpr->IgnoreParenCasts())) { | |||
14032 | unsigned Diag = diag::warn_objc_pointer_masking; | |||
14033 | // Determine if we are introspecting the result of performSelectorXXX. | |||
14034 | const Expr *Ex = ObjCPointerExpr->IgnoreParenCasts(); | |||
14035 | // Special case messages to -performSelector and friends, which | |||
14036 | // can return non-pointer values boxed in a pointer value. | |||
14037 | // Some clients may wish to silence warnings in this subcase. | |||
14038 | if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(Ex)) { | |||
14039 | Selector S = ME->getSelector(); | |||
14040 | StringRef SelArg0 = S.getNameForSlot(0); | |||
14041 | if (SelArg0.startswith("performSelector")) | |||
14042 | Diag = diag::warn_objc_pointer_masking_performSelector; | |||
14043 | } | |||
14044 | ||||
14045 | S.Diag(OpLoc, Diag) | |||
14046 | << ObjCPointerExpr->getSourceRange(); | |||
14047 | } | |||
14048 | } | |||
14049 | ||||
14050 | static NamedDecl *getDeclFromExpr(Expr *E) { | |||
14051 | if (!E) | |||
14052 | return nullptr; | |||
14053 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
14054 | return DRE->getDecl(); | |||
14055 | if (auto *ME = dyn_cast<MemberExpr>(E)) | |||
14056 | return ME->getMemberDecl(); | |||
14057 | if (auto *IRE = dyn_cast<ObjCIvarRefExpr>(E)) | |||
14058 | return IRE->getDecl(); | |||
14059 | return nullptr; | |||
14060 | } | |||
14061 | ||||
14062 | // This helper function promotes a binary operator's operands (which are of a | |||
14063 | // half vector type) to a vector of floats and then truncates the result to | |||
14064 | // a vector of either half or short. | |||
14065 | static ExprResult convertHalfVecBinOp(Sema &S, ExprResult LHS, ExprResult RHS, | |||
14066 | BinaryOperatorKind Opc, QualType ResultTy, | |||
14067 | ExprValueKind VK, ExprObjectKind OK, | |||
14068 | bool IsCompAssign, SourceLocation OpLoc, | |||
14069 | FPOptionsOverride FPFeatures) { | |||
14070 | auto &Context = S.getASTContext(); | |||
14071 | assert((isVector(ResultTy, Context.HalfTy) ||(static_cast <bool> ((isVector(ResultTy, Context.HalfTy ) || isVector(ResultTy, Context.ShortTy)) && "Result must be a vector of half or short" ) ? void (0) : __assert_fail ("(isVector(ResultTy, Context.HalfTy) || isVector(ResultTy, Context.ShortTy)) && \"Result must be a vector of half or short\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14073, __extension__ __PRETTY_FUNCTION__)) | |||
14072 | isVector(ResultTy, Context.ShortTy)) &&(static_cast <bool> ((isVector(ResultTy, Context.HalfTy ) || isVector(ResultTy, Context.ShortTy)) && "Result must be a vector of half or short" ) ? void (0) : __assert_fail ("(isVector(ResultTy, Context.HalfTy) || isVector(ResultTy, Context.ShortTy)) && \"Result must be a vector of half or short\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14073, __extension__ __PRETTY_FUNCTION__)) | |||
14073 | "Result must be a vector of half or short")(static_cast <bool> ((isVector(ResultTy, Context.HalfTy ) || isVector(ResultTy, Context.ShortTy)) && "Result must be a vector of half or short" ) ? void (0) : __assert_fail ("(isVector(ResultTy, Context.HalfTy) || isVector(ResultTy, Context.ShortTy)) && \"Result must be a vector of half or short\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14073, __extension__ __PRETTY_FUNCTION__)); | |||
14074 | assert(isVector(LHS.get()->getType(), Context.HalfTy) &&(static_cast <bool> (isVector(LHS.get()->getType(), Context .HalfTy) && isVector(RHS.get()->getType(), Context .HalfTy) && "both operands expected to be a half vector" ) ? void (0) : __assert_fail ("isVector(LHS.get()->getType(), Context.HalfTy) && isVector(RHS.get()->getType(), Context.HalfTy) && \"both operands expected to be a half vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14076, __extension__ __PRETTY_FUNCTION__)) | |||
14075 | isVector(RHS.get()->getType(), Context.HalfTy) &&(static_cast <bool> (isVector(LHS.get()->getType(), Context .HalfTy) && isVector(RHS.get()->getType(), Context .HalfTy) && "both operands expected to be a half vector" ) ? void (0) : __assert_fail ("isVector(LHS.get()->getType(), Context.HalfTy) && isVector(RHS.get()->getType(), Context.HalfTy) && \"both operands expected to be a half vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14076, __extension__ __PRETTY_FUNCTION__)) | |||
14076 | "both operands expected to be a half vector")(static_cast <bool> (isVector(LHS.get()->getType(), Context .HalfTy) && isVector(RHS.get()->getType(), Context .HalfTy) && "both operands expected to be a half vector" ) ? void (0) : __assert_fail ("isVector(LHS.get()->getType(), Context.HalfTy) && isVector(RHS.get()->getType(), Context.HalfTy) && \"both operands expected to be a half vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14076, __extension__ __PRETTY_FUNCTION__)); | |||
14077 | ||||
14078 | RHS = convertVector(RHS.get(), Context.FloatTy, S); | |||
14079 | QualType BinOpResTy = RHS.get()->getType(); | |||
14080 | ||||
14081 | // If Opc is a comparison, ResultType is a vector of shorts. In that case, | |||
14082 | // change BinOpResTy to a vector of ints. | |||
14083 | if (isVector(ResultTy, Context.ShortTy)) | |||
14084 | BinOpResTy = S.GetSignedVectorType(BinOpResTy); | |||
14085 | ||||
14086 | if (IsCompAssign) | |||
14087 | return CompoundAssignOperator::Create(Context, LHS.get(), RHS.get(), Opc, | |||
14088 | ResultTy, VK, OK, OpLoc, FPFeatures, | |||
14089 | BinOpResTy, BinOpResTy); | |||
14090 | ||||
14091 | LHS = convertVector(LHS.get(), Context.FloatTy, S); | |||
14092 | auto *BO = BinaryOperator::Create(Context, LHS.get(), RHS.get(), Opc, | |||
14093 | BinOpResTy, VK, OK, OpLoc, FPFeatures); | |||
14094 | return convertVector(BO, ResultTy->castAs<VectorType>()->getElementType(), S); | |||
14095 | } | |||
14096 | ||||
14097 | static std::pair<ExprResult, ExprResult> | |||
14098 | CorrectDelayedTyposInBinOp(Sema &S, BinaryOperatorKind Opc, Expr *LHSExpr, | |||
14099 | Expr *RHSExpr) { | |||
14100 | ExprResult LHS = LHSExpr, RHS = RHSExpr; | |||
14101 | if (!S.Context.isDependenceAllowed()) { | |||
14102 | // C cannot handle TypoExpr nodes on either side of a binop because it | |||
14103 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
14104 | // been dealt with before checking the operands. | |||
14105 | LHS = S.CorrectDelayedTyposInExpr(LHS); | |||
14106 | RHS = S.CorrectDelayedTyposInExpr( | |||
14107 | RHS, /*InitDecl=*/nullptr, /*RecoverUncorrectedTypos=*/false, | |||
14108 | [Opc, LHS](Expr *E) { | |||
14109 | if (Opc != BO_Assign) | |||
14110 | return ExprResult(E); | |||
14111 | // Avoid correcting the RHS to the same Expr as the LHS. | |||
14112 | Decl *D = getDeclFromExpr(E); | |||
14113 | return (D && D == getDeclFromExpr(LHS.get())) ? ExprError() : E; | |||
14114 | }); | |||
14115 | } | |||
14116 | return std::make_pair(LHS, RHS); | |||
14117 | } | |||
14118 | ||||
14119 | /// Returns true if conversion between vectors of halfs and vectors of floats | |||
14120 | /// is needed. | |||
14121 | static bool needsConversionOfHalfVec(bool OpRequiresConversion, ASTContext &Ctx, | |||
14122 | Expr *E0, Expr *E1 = nullptr) { | |||
14123 | if (!OpRequiresConversion || Ctx.getLangOpts().NativeHalfType || | |||
14124 | Ctx.getTargetInfo().useFP16ConversionIntrinsics()) | |||
14125 | return false; | |||
14126 | ||||
14127 | auto HasVectorOfHalfType = [&Ctx](Expr *E) { | |||
14128 | QualType Ty = E->IgnoreImplicit()->getType(); | |||
14129 | ||||
14130 | // Don't promote half precision neon vectors like float16x4_t in arm_neon.h | |||
14131 | // to vectors of floats. Although the element type of the vectors is __fp16, | |||
14132 | // the vectors shouldn't be treated as storage-only types. See the | |||
14133 | // discussion here: https://reviews.llvm.org/rG825235c140e7 | |||
14134 | if (const VectorType *VT = Ty->getAs<VectorType>()) { | |||
14135 | if (VT->getVectorKind() == VectorType::NeonVector) | |||
14136 | return false; | |||
14137 | return VT->getElementType().getCanonicalType() == Ctx.HalfTy; | |||
14138 | } | |||
14139 | return false; | |||
14140 | }; | |||
14141 | ||||
14142 | return HasVectorOfHalfType(E0) && (!E1 || HasVectorOfHalfType(E1)); | |||
14143 | } | |||
14144 | ||||
14145 | /// CreateBuiltinBinOp - Creates a new built-in binary operation with | |||
14146 | /// operator @p Opc at location @c TokLoc. This routine only supports | |||
14147 | /// built-in operations; ActOnBinOp handles overloaded operators. | |||
14148 | ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc, | |||
14149 | BinaryOperatorKind Opc, | |||
14150 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14151 | if (getLangOpts().CPlusPlus11 && isa<InitListExpr>(RHSExpr)) { | |||
14152 | // The syntax only allows initializer lists on the RHS of assignment, | |||
14153 | // so we don't need to worry about accepting invalid code for | |||
14154 | // non-assignment operators. | |||
14155 | // C++11 5.17p9: | |||
14156 | // The meaning of x = {v} [...] is that of x = T(v) [...]. The meaning | |||
14157 | // of x = {} is x = T(). | |||
14158 | InitializationKind Kind = InitializationKind::CreateDirectList( | |||
14159 | RHSExpr->getBeginLoc(), RHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
14160 | InitializedEntity Entity = | |||
14161 | InitializedEntity::InitializeTemporary(LHSExpr->getType()); | |||
14162 | InitializationSequence InitSeq(*this, Entity, Kind, RHSExpr); | |||
14163 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, RHSExpr); | |||
14164 | if (Init.isInvalid()) | |||
14165 | return Init; | |||
14166 | RHSExpr = Init.get(); | |||
14167 | } | |||
14168 | ||||
14169 | ExprResult LHS = LHSExpr, RHS = RHSExpr; | |||
14170 | QualType ResultTy; // Result type of the binary operator. | |||
14171 | // The following two variables are used for compound assignment operators | |||
14172 | QualType CompLHSTy; // Type of LHS after promotions for computation | |||
14173 | QualType CompResultTy; // Type of computation result | |||
14174 | ExprValueKind VK = VK_PRValue; | |||
14175 | ExprObjectKind OK = OK_Ordinary; | |||
14176 | bool ConvertHalfVec = false; | |||
14177 | ||||
14178 | std::tie(LHS, RHS) = CorrectDelayedTyposInBinOp(*this, Opc, LHSExpr, RHSExpr); | |||
14179 | if (!LHS.isUsable() || !RHS.isUsable()) | |||
14180 | return ExprError(); | |||
14181 | ||||
14182 | if (getLangOpts().OpenCL) { | |||
14183 | QualType LHSTy = LHSExpr->getType(); | |||
14184 | QualType RHSTy = RHSExpr->getType(); | |||
14185 | // OpenCLC v2.0 s6.13.11.1 allows atomic variables to be initialized by | |||
14186 | // the ATOMIC_VAR_INIT macro. | |||
14187 | if (LHSTy->isAtomicType() || RHSTy->isAtomicType()) { | |||
14188 | SourceRange SR(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
14189 | if (BO_Assign == Opc) | |||
14190 | Diag(OpLoc, diag::err_opencl_atomic_init) << 0 << SR; | |||
14191 | else | |||
14192 | ResultTy = InvalidOperands(OpLoc, LHS, RHS); | |||
14193 | return ExprError(); | |||
14194 | } | |||
14195 | ||||
14196 | // OpenCL special types - image, sampler, pipe, and blocks are to be used | |||
14197 | // only with a builtin functions and therefore should be disallowed here. | |||
14198 | if (LHSTy->isImageType() || RHSTy->isImageType() || | |||
14199 | LHSTy->isSamplerT() || RHSTy->isSamplerT() || | |||
14200 | LHSTy->isPipeType() || RHSTy->isPipeType() || | |||
14201 | LHSTy->isBlockPointerType() || RHSTy->isBlockPointerType()) { | |||
14202 | ResultTy = InvalidOperands(OpLoc, LHS, RHS); | |||
14203 | return ExprError(); | |||
14204 | } | |||
14205 | } | |||
14206 | ||||
14207 | switch (Opc) { | |||
14208 | case BO_Assign: | |||
14209 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, QualType()); | |||
14210 | if (getLangOpts().CPlusPlus && | |||
14211 | LHS.get()->getObjectKind() != OK_ObjCProperty) { | |||
14212 | VK = LHS.get()->getValueKind(); | |||
14213 | OK = LHS.get()->getObjectKind(); | |||
14214 | } | |||
14215 | if (!ResultTy.isNull()) { | |||
14216 | DiagnoseSelfAssignment(*this, LHS.get(), RHS.get(), OpLoc, true); | |||
14217 | DiagnoseSelfMove(LHS.get(), RHS.get(), OpLoc); | |||
14218 | ||||
14219 | // Avoid copying a block to the heap if the block is assigned to a local | |||
14220 | // auto variable that is declared in the same scope as the block. This | |||
14221 | // optimization is unsafe if the local variable is declared in an outer | |||
14222 | // scope. For example: | |||
14223 | // | |||
14224 | // BlockTy b; | |||
14225 | // { | |||
14226 | // b = ^{...}; | |||
14227 | // } | |||
14228 | // // It is unsafe to invoke the block here if it wasn't copied to the | |||
14229 | // // heap. | |||
14230 | // b(); | |||
14231 | ||||
14232 | if (auto *BE = dyn_cast<BlockExpr>(RHS.get()->IgnoreParens())) | |||
14233 | if (auto *DRE = dyn_cast<DeclRefExpr>(LHS.get()->IgnoreParens())) | |||
14234 | if (auto *VD = dyn_cast<VarDecl>(DRE->getDecl())) | |||
14235 | if (VD->hasLocalStorage() && getCurScope()->isDeclScope(VD)) | |||
14236 | BE->getBlockDecl()->setCanAvoidCopyToHeap(); | |||
14237 | ||||
14238 | if (LHS.get()->getType().hasNonTrivialToPrimitiveCopyCUnion()) | |||
14239 | checkNonTrivialCUnion(LHS.get()->getType(), LHS.get()->getExprLoc(), | |||
14240 | NTCUC_Assignment, NTCUK_Copy); | |||
14241 | } | |||
14242 | RecordModifiableNonNullParam(*this, LHS.get()); | |||
14243 | break; | |||
14244 | case BO_PtrMemD: | |||
14245 | case BO_PtrMemI: | |||
14246 | ResultTy = CheckPointerToMemberOperands(LHS, RHS, VK, OpLoc, | |||
14247 | Opc == BO_PtrMemI); | |||
14248 | break; | |||
14249 | case BO_Mul: | |||
14250 | case BO_Div: | |||
14251 | ConvertHalfVec = true; | |||
14252 | ResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, false, | |||
14253 | Opc == BO_Div); | |||
14254 | break; | |||
14255 | case BO_Rem: | |||
14256 | ResultTy = CheckRemainderOperands(LHS, RHS, OpLoc); | |||
14257 | break; | |||
14258 | case BO_Add: | |||
14259 | ConvertHalfVec = true; | |||
14260 | ResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc); | |||
14261 | break; | |||
14262 | case BO_Sub: | |||
14263 | ConvertHalfVec = true; | |||
14264 | ResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc); | |||
14265 | break; | |||
14266 | case BO_Shl: | |||
14267 | case BO_Shr: | |||
14268 | ResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc); | |||
14269 | break; | |||
14270 | case BO_LE: | |||
14271 | case BO_LT: | |||
14272 | case BO_GE: | |||
14273 | case BO_GT: | |||
14274 | ConvertHalfVec = true; | |||
14275 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
14276 | break; | |||
14277 | case BO_EQ: | |||
14278 | case BO_NE: | |||
14279 | ConvertHalfVec = true; | |||
14280 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
14281 | break; | |||
14282 | case BO_Cmp: | |||
14283 | ConvertHalfVec = true; | |||
14284 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
14285 | assert(ResultTy.isNull() || ResultTy->getAsCXXRecordDecl())(static_cast <bool> (ResultTy.isNull() || ResultTy-> getAsCXXRecordDecl()) ? void (0) : __assert_fail ("ResultTy.isNull() || ResultTy->getAsCXXRecordDecl()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14285, __extension__ __PRETTY_FUNCTION__)); | |||
14286 | break; | |||
14287 | case BO_And: | |||
14288 | checkObjCPointerIntrospection(*this, LHS, RHS, OpLoc); | |||
14289 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
14290 | case BO_Xor: | |||
14291 | case BO_Or: | |||
14292 | ResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc, Opc); | |||
14293 | break; | |||
14294 | case BO_LAnd: | |||
14295 | case BO_LOr: | |||
14296 | ConvertHalfVec = true; | |||
14297 | ResultTy = CheckLogicalOperands(LHS, RHS, OpLoc, Opc); | |||
14298 | break; | |||
14299 | case BO_MulAssign: | |||
14300 | case BO_DivAssign: | |||
14301 | ConvertHalfVec = true; | |||
14302 | CompResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, true, | |||
14303 | Opc == BO_DivAssign); | |||
14304 | CompLHSTy = CompResultTy; | |||
14305 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14306 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14307 | break; | |||
14308 | case BO_RemAssign: | |||
14309 | CompResultTy = CheckRemainderOperands(LHS, RHS, OpLoc, true); | |||
14310 | CompLHSTy = CompResultTy; | |||
14311 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14312 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14313 | break; | |||
14314 | case BO_AddAssign: | |||
14315 | ConvertHalfVec = true; | |||
14316 | CompResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc, &CompLHSTy); | |||
14317 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14318 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14319 | break; | |||
14320 | case BO_SubAssign: | |||
14321 | ConvertHalfVec = true; | |||
14322 | CompResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc, &CompLHSTy); | |||
14323 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14324 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14325 | break; | |||
14326 | case BO_ShlAssign: | |||
14327 | case BO_ShrAssign: | |||
14328 | CompResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc, true); | |||
14329 | CompLHSTy = CompResultTy; | |||
14330 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14331 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14332 | break; | |||
14333 | case BO_AndAssign: | |||
14334 | case BO_OrAssign: // fallthrough | |||
14335 | DiagnoseSelfAssignment(*this, LHS.get(), RHS.get(), OpLoc, true); | |||
14336 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
14337 | case BO_XorAssign: | |||
14338 | CompResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc, Opc); | |||
14339 | CompLHSTy = CompResultTy; | |||
14340 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
14341 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy); | |||
14342 | break; | |||
14343 | case BO_Comma: | |||
14344 | ResultTy = CheckCommaOperands(*this, LHS, RHS, OpLoc); | |||
14345 | if (getLangOpts().CPlusPlus && !RHS.isInvalid()) { | |||
14346 | VK = RHS.get()->getValueKind(); | |||
14347 | OK = RHS.get()->getObjectKind(); | |||
14348 | } | |||
14349 | break; | |||
14350 | } | |||
14351 | if (ResultTy.isNull() || LHS.isInvalid() || RHS.isInvalid()) | |||
14352 | return ExprError(); | |||
14353 | ||||
14354 | // Some of the binary operations require promoting operands of half vector to | |||
14355 | // float vectors and truncating the result back to half vector. For now, we do | |||
14356 | // this only when HalfArgsAndReturn is set (that is, when the target is arm or | |||
14357 | // arm64). | |||
14358 | assert((static_cast <bool> ((Opc == BO_Comma || isVector(RHS.get ()->getType(), Context.HalfTy) == isVector(LHS.get()->getType (), Context.HalfTy)) && "both sides are half vectors or neither sides are" ) ? void (0) : __assert_fail ("(Opc == BO_Comma || isVector(RHS.get()->getType(), Context.HalfTy) == isVector(LHS.get()->getType(), Context.HalfTy)) && \"both sides are half vectors or neither sides are\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14361, __extension__ __PRETTY_FUNCTION__)) | |||
14359 | (Opc == BO_Comma || isVector(RHS.get()->getType(), Context.HalfTy) ==(static_cast <bool> ((Opc == BO_Comma || isVector(RHS.get ()->getType(), Context.HalfTy) == isVector(LHS.get()->getType (), Context.HalfTy)) && "both sides are half vectors or neither sides are" ) ? void (0) : __assert_fail ("(Opc == BO_Comma || isVector(RHS.get()->getType(), Context.HalfTy) == isVector(LHS.get()->getType(), Context.HalfTy)) && \"both sides are half vectors or neither sides are\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14361, __extension__ __PRETTY_FUNCTION__)) | |||
14360 | isVector(LHS.get()->getType(), Context.HalfTy)) &&(static_cast <bool> ((Opc == BO_Comma || isVector(RHS.get ()->getType(), Context.HalfTy) == isVector(LHS.get()->getType (), Context.HalfTy)) && "both sides are half vectors or neither sides are" ) ? void (0) : __assert_fail ("(Opc == BO_Comma || isVector(RHS.get()->getType(), Context.HalfTy) == isVector(LHS.get()->getType(), Context.HalfTy)) && \"both sides are half vectors or neither sides are\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14361, __extension__ __PRETTY_FUNCTION__)) | |||
14361 | "both sides are half vectors or neither sides are")(static_cast <bool> ((Opc == BO_Comma || isVector(RHS.get ()->getType(), Context.HalfTy) == isVector(LHS.get()->getType (), Context.HalfTy)) && "both sides are half vectors or neither sides are" ) ? void (0) : __assert_fail ("(Opc == BO_Comma || isVector(RHS.get()->getType(), Context.HalfTy) == isVector(LHS.get()->getType(), Context.HalfTy)) && \"both sides are half vectors or neither sides are\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14361, __extension__ __PRETTY_FUNCTION__)); | |||
14362 | ConvertHalfVec = | |||
14363 | needsConversionOfHalfVec(ConvertHalfVec, Context, LHS.get(), RHS.get()); | |||
14364 | ||||
14365 | // Check for array bounds violations for both sides of the BinaryOperator | |||
14366 | CheckArrayAccess(LHS.get()); | |||
14367 | CheckArrayAccess(RHS.get()); | |||
14368 | ||||
14369 | if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(LHS.get()->IgnoreParenCasts())) { | |||
14370 | NamedDecl *ObjectSetClass = LookupSingleName(TUScope, | |||
14371 | &Context.Idents.get("object_setClass"), | |||
14372 | SourceLocation(), LookupOrdinaryName); | |||
14373 | if (ObjectSetClass && isa<ObjCIsaExpr>(LHS.get())) { | |||
14374 | SourceLocation RHSLocEnd = getLocForEndOfToken(RHS.get()->getEndLoc()); | |||
14375 | Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign) | |||
14376 | << FixItHint::CreateInsertion(LHS.get()->getBeginLoc(), | |||
14377 | "object_setClass(") | |||
14378 | << FixItHint::CreateReplacement(SourceRange(OISA->getOpLoc(), OpLoc), | |||
14379 | ",") | |||
14380 | << FixItHint::CreateInsertion(RHSLocEnd, ")"); | |||
14381 | } | |||
14382 | else | |||
14383 | Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign); | |||
14384 | } | |||
14385 | else if (const ObjCIvarRefExpr *OIRE = | |||
14386 | dyn_cast<ObjCIvarRefExpr>(LHS.get()->IgnoreParenCasts())) | |||
14387 | DiagnoseDirectIsaAccess(*this, OIRE, OpLoc, RHS.get()); | |||
14388 | ||||
14389 | // Opc is not a compound assignment if CompResultTy is null. | |||
14390 | if (CompResultTy.isNull()) { | |||
14391 | if (ConvertHalfVec) | |||
14392 | return convertHalfVecBinOp(*this, LHS, RHS, Opc, ResultTy, VK, OK, false, | |||
14393 | OpLoc, CurFPFeatureOverrides()); | |||
14394 | return BinaryOperator::Create(Context, LHS.get(), RHS.get(), Opc, ResultTy, | |||
14395 | VK, OK, OpLoc, CurFPFeatureOverrides()); | |||
14396 | } | |||
14397 | ||||
14398 | // Handle compound assignments. | |||
14399 | if (getLangOpts().CPlusPlus && LHS.get()->getObjectKind() != | |||
14400 | OK_ObjCProperty) { | |||
14401 | VK = VK_LValue; | |||
14402 | OK = LHS.get()->getObjectKind(); | |||
14403 | } | |||
14404 | ||||
14405 | // The LHS is not converted to the result type for fixed-point compound | |||
14406 | // assignment as the common type is computed on demand. Reset the CompLHSTy | |||
14407 | // to the LHS type we would have gotten after unary conversions. | |||
14408 | if (CompResultTy->isFixedPointType()) | |||
14409 | CompLHSTy = UsualUnaryConversions(LHS.get()).get()->getType(); | |||
14410 | ||||
14411 | if (ConvertHalfVec) | |||
14412 | return convertHalfVecBinOp(*this, LHS, RHS, Opc, ResultTy, VK, OK, true, | |||
14413 | OpLoc, CurFPFeatureOverrides()); | |||
14414 | ||||
14415 | return CompoundAssignOperator::Create( | |||
14416 | Context, LHS.get(), RHS.get(), Opc, ResultTy, VK, OK, OpLoc, | |||
14417 | CurFPFeatureOverrides(), CompLHSTy, CompResultTy); | |||
14418 | } | |||
14419 | ||||
14420 | /// DiagnoseBitwisePrecedence - Emit a warning when bitwise and comparison | |||
14421 | /// operators are mixed in a way that suggests that the programmer forgot that | |||
14422 | /// comparison operators have higher precedence. The most typical example of | |||
14423 | /// such code is "flags & 0x0020 != 0", which is equivalent to "flags & 1". | |||
14424 | static void DiagnoseBitwisePrecedence(Sema &Self, BinaryOperatorKind Opc, | |||
14425 | SourceLocation OpLoc, Expr *LHSExpr, | |||
14426 | Expr *RHSExpr) { | |||
14427 | BinaryOperator *LHSBO = dyn_cast<BinaryOperator>(LHSExpr); | |||
14428 | BinaryOperator *RHSBO = dyn_cast<BinaryOperator>(RHSExpr); | |||
14429 | ||||
14430 | // Check that one of the sides is a comparison operator and the other isn't. | |||
14431 | bool isLeftComp = LHSBO && LHSBO->isComparisonOp(); | |||
14432 | bool isRightComp = RHSBO && RHSBO->isComparisonOp(); | |||
14433 | if (isLeftComp == isRightComp) | |||
14434 | return; | |||
14435 | ||||
14436 | // Bitwise operations are sometimes used as eager logical ops. | |||
14437 | // Don't diagnose this. | |||
14438 | bool isLeftBitwise = LHSBO && LHSBO->isBitwiseOp(); | |||
14439 | bool isRightBitwise = RHSBO && RHSBO->isBitwiseOp(); | |||
14440 | if (isLeftBitwise || isRightBitwise) | |||
14441 | return; | |||
14442 | ||||
14443 | SourceRange DiagRange = isLeftComp | |||
14444 | ? SourceRange(LHSExpr->getBeginLoc(), OpLoc) | |||
14445 | : SourceRange(OpLoc, RHSExpr->getEndLoc()); | |||
14446 | StringRef OpStr = isLeftComp ? LHSBO->getOpcodeStr() : RHSBO->getOpcodeStr(); | |||
14447 | SourceRange ParensRange = | |||
14448 | isLeftComp | |||
14449 | ? SourceRange(LHSBO->getRHS()->getBeginLoc(), RHSExpr->getEndLoc()) | |||
14450 | : SourceRange(LHSExpr->getBeginLoc(), RHSBO->getLHS()->getEndLoc()); | |||
14451 | ||||
14452 | Self.Diag(OpLoc, diag::warn_precedence_bitwise_rel) | |||
14453 | << DiagRange << BinaryOperator::getOpcodeStr(Opc) << OpStr; | |||
14454 | SuggestParentheses(Self, OpLoc, | |||
14455 | Self.PDiag(diag::note_precedence_silence) << OpStr, | |||
14456 | (isLeftComp ? LHSExpr : RHSExpr)->getSourceRange()); | |||
14457 | SuggestParentheses(Self, OpLoc, | |||
14458 | Self.PDiag(diag::note_precedence_bitwise_first) | |||
14459 | << BinaryOperator::getOpcodeStr(Opc), | |||
14460 | ParensRange); | |||
14461 | } | |||
14462 | ||||
14463 | /// It accepts a '&&' expr that is inside a '||' one. | |||
14464 | /// Emit a diagnostic together with a fixit hint that wraps the '&&' expression | |||
14465 | /// in parentheses. | |||
14466 | static void | |||
14467 | EmitDiagnosticForLogicalAndInLogicalOr(Sema &Self, SourceLocation OpLoc, | |||
14468 | BinaryOperator *Bop) { | |||
14469 | assert(Bop->getOpcode() == BO_LAnd)(static_cast <bool> (Bop->getOpcode() == BO_LAnd) ? void (0) : __assert_fail ("Bop->getOpcode() == BO_LAnd", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14469, __extension__ __PRETTY_FUNCTION__)); | |||
14470 | Self.Diag(Bop->getOperatorLoc(), diag::warn_logical_and_in_logical_or) | |||
14471 | << Bop->getSourceRange() << OpLoc; | |||
14472 | SuggestParentheses(Self, Bop->getOperatorLoc(), | |||
14473 | Self.PDiag(diag::note_precedence_silence) | |||
14474 | << Bop->getOpcodeStr(), | |||
14475 | Bop->getSourceRange()); | |||
14476 | } | |||
14477 | ||||
14478 | /// Returns true if the given expression can be evaluated as a constant | |||
14479 | /// 'true'. | |||
14480 | static bool EvaluatesAsTrue(Sema &S, Expr *E) { | |||
14481 | bool Res; | |||
14482 | return !E->isValueDependent() && | |||
14483 | E->EvaluateAsBooleanCondition(Res, S.getASTContext()) && Res; | |||
14484 | } | |||
14485 | ||||
14486 | /// Returns true if the given expression can be evaluated as a constant | |||
14487 | /// 'false'. | |||
14488 | static bool EvaluatesAsFalse(Sema &S, Expr *E) { | |||
14489 | bool Res; | |||
14490 | return !E->isValueDependent() && | |||
14491 | E->EvaluateAsBooleanCondition(Res, S.getASTContext()) && !Res; | |||
14492 | } | |||
14493 | ||||
14494 | /// Look for '&&' in the left hand of a '||' expr. | |||
14495 | static void DiagnoseLogicalAndInLogicalOrLHS(Sema &S, SourceLocation OpLoc, | |||
14496 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14497 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(LHSExpr)) { | |||
14498 | if (Bop->getOpcode() == BO_LAnd) { | |||
14499 | // If it's "a && b || 0" don't warn since the precedence doesn't matter. | |||
14500 | if (EvaluatesAsFalse(S, RHSExpr)) | |||
14501 | return; | |||
14502 | // If it's "1 && a || b" don't warn since the precedence doesn't matter. | |||
14503 | if (!EvaluatesAsTrue(S, Bop->getLHS())) | |||
14504 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop); | |||
14505 | } else if (Bop->getOpcode() == BO_LOr) { | |||
14506 | if (BinaryOperator *RBop = dyn_cast<BinaryOperator>(Bop->getRHS())) { | |||
14507 | // If it's "a || b && 1 || c" we didn't warn earlier for | |||
14508 | // "a || b && 1", but warn now. | |||
14509 | if (RBop->getOpcode() == BO_LAnd && EvaluatesAsTrue(S, RBop->getRHS())) | |||
14510 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, RBop); | |||
14511 | } | |||
14512 | } | |||
14513 | } | |||
14514 | } | |||
14515 | ||||
14516 | /// Look for '&&' in the right hand of a '||' expr. | |||
14517 | static void DiagnoseLogicalAndInLogicalOrRHS(Sema &S, SourceLocation OpLoc, | |||
14518 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14519 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(RHSExpr)) { | |||
14520 | if (Bop->getOpcode() == BO_LAnd) { | |||
14521 | // If it's "0 || a && b" don't warn since the precedence doesn't matter. | |||
14522 | if (EvaluatesAsFalse(S, LHSExpr)) | |||
14523 | return; | |||
14524 | // If it's "a || b && 1" don't warn since the precedence doesn't matter. | |||
14525 | if (!EvaluatesAsTrue(S, Bop->getRHS())) | |||
14526 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop); | |||
14527 | } | |||
14528 | } | |||
14529 | } | |||
14530 | ||||
14531 | /// Look for bitwise op in the left or right hand of a bitwise op with | |||
14532 | /// lower precedence and emit a diagnostic together with a fixit hint that wraps | |||
14533 | /// the '&' expression in parentheses. | |||
14534 | static void DiagnoseBitwiseOpInBitwiseOp(Sema &S, BinaryOperatorKind Opc, | |||
14535 | SourceLocation OpLoc, Expr *SubExpr) { | |||
14536 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(SubExpr)) { | |||
14537 | if (Bop->isBitwiseOp() && Bop->getOpcode() < Opc) { | |||
14538 | S.Diag(Bop->getOperatorLoc(), diag::warn_bitwise_op_in_bitwise_op) | |||
14539 | << Bop->getOpcodeStr() << BinaryOperator::getOpcodeStr(Opc) | |||
14540 | << Bop->getSourceRange() << OpLoc; | |||
14541 | SuggestParentheses(S, Bop->getOperatorLoc(), | |||
14542 | S.PDiag(diag::note_precedence_silence) | |||
14543 | << Bop->getOpcodeStr(), | |||
14544 | Bop->getSourceRange()); | |||
14545 | } | |||
14546 | } | |||
14547 | } | |||
14548 | ||||
14549 | static void DiagnoseAdditionInShift(Sema &S, SourceLocation OpLoc, | |||
14550 | Expr *SubExpr, StringRef Shift) { | |||
14551 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(SubExpr)) { | |||
14552 | if (Bop->getOpcode() == BO_Add || Bop->getOpcode() == BO_Sub) { | |||
14553 | StringRef Op = Bop->getOpcodeStr(); | |||
14554 | S.Diag(Bop->getOperatorLoc(), diag::warn_addition_in_bitshift) | |||
14555 | << Bop->getSourceRange() << OpLoc << Shift << Op; | |||
14556 | SuggestParentheses(S, Bop->getOperatorLoc(), | |||
14557 | S.PDiag(diag::note_precedence_silence) << Op, | |||
14558 | Bop->getSourceRange()); | |||
14559 | } | |||
14560 | } | |||
14561 | } | |||
14562 | ||||
14563 | static void DiagnoseShiftCompare(Sema &S, SourceLocation OpLoc, | |||
14564 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14565 | CXXOperatorCallExpr *OCE = dyn_cast<CXXOperatorCallExpr>(LHSExpr); | |||
14566 | if (!OCE) | |||
14567 | return; | |||
14568 | ||||
14569 | FunctionDecl *FD = OCE->getDirectCallee(); | |||
14570 | if (!FD || !FD->isOverloadedOperator()) | |||
14571 | return; | |||
14572 | ||||
14573 | OverloadedOperatorKind Kind = FD->getOverloadedOperator(); | |||
14574 | if (Kind != OO_LessLess && Kind != OO_GreaterGreater) | |||
14575 | return; | |||
14576 | ||||
14577 | S.Diag(OpLoc, diag::warn_overloaded_shift_in_comparison) | |||
14578 | << LHSExpr->getSourceRange() << RHSExpr->getSourceRange() | |||
14579 | << (Kind == OO_LessLess); | |||
14580 | SuggestParentheses(S, OCE->getOperatorLoc(), | |||
14581 | S.PDiag(diag::note_precedence_silence) | |||
14582 | << (Kind == OO_LessLess ? "<<" : ">>"), | |||
14583 | OCE->getSourceRange()); | |||
14584 | SuggestParentheses( | |||
14585 | S, OpLoc, S.PDiag(diag::note_evaluate_comparison_first), | |||
14586 | SourceRange(OCE->getArg(1)->getBeginLoc(), RHSExpr->getEndLoc())); | |||
14587 | } | |||
14588 | ||||
14589 | /// DiagnoseBinOpPrecedence - Emit warnings for expressions with tricky | |||
14590 | /// precedence. | |||
14591 | static void DiagnoseBinOpPrecedence(Sema &Self, BinaryOperatorKind Opc, | |||
14592 | SourceLocation OpLoc, Expr *LHSExpr, | |||
14593 | Expr *RHSExpr){ | |||
14594 | // Diagnose "arg1 'bitwise' arg2 'eq' arg3". | |||
14595 | if (BinaryOperator::isBitwiseOp(Opc)) | |||
14596 | DiagnoseBitwisePrecedence(Self, Opc, OpLoc, LHSExpr, RHSExpr); | |||
14597 | ||||
14598 | // Diagnose "arg1 & arg2 | arg3" | |||
14599 | if ((Opc == BO_Or || Opc == BO_Xor) && | |||
14600 | !OpLoc.isMacroID()/* Don't warn in macros. */) { | |||
14601 | DiagnoseBitwiseOpInBitwiseOp(Self, Opc, OpLoc, LHSExpr); | |||
14602 | DiagnoseBitwiseOpInBitwiseOp(Self, Opc, OpLoc, RHSExpr); | |||
14603 | } | |||
14604 | ||||
14605 | // Warn about arg1 || arg2 && arg3, as GCC 4.3+ does. | |||
14606 | // We don't warn for 'assert(a || b && "bad")' since this is safe. | |||
14607 | if (Opc == BO_LOr && !OpLoc.isMacroID()/* Don't warn in macros. */) { | |||
14608 | DiagnoseLogicalAndInLogicalOrLHS(Self, OpLoc, LHSExpr, RHSExpr); | |||
14609 | DiagnoseLogicalAndInLogicalOrRHS(Self, OpLoc, LHSExpr, RHSExpr); | |||
14610 | } | |||
14611 | ||||
14612 | if ((Opc == BO_Shl && LHSExpr->getType()->isIntegralType(Self.getASTContext())) | |||
14613 | || Opc == BO_Shr) { | |||
14614 | StringRef Shift = BinaryOperator::getOpcodeStr(Opc); | |||
14615 | DiagnoseAdditionInShift(Self, OpLoc, LHSExpr, Shift); | |||
14616 | DiagnoseAdditionInShift(Self, OpLoc, RHSExpr, Shift); | |||
14617 | } | |||
14618 | ||||
14619 | // Warn on overloaded shift operators and comparisons, such as: | |||
14620 | // cout << 5 == 4; | |||
14621 | if (BinaryOperator::isComparisonOp(Opc)) | |||
14622 | DiagnoseShiftCompare(Self, OpLoc, LHSExpr, RHSExpr); | |||
14623 | } | |||
14624 | ||||
14625 | // Binary Operators. 'Tok' is the token for the operator. | |||
14626 | ExprResult Sema::ActOnBinOp(Scope *S, SourceLocation TokLoc, | |||
14627 | tok::TokenKind Kind, | |||
14628 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14629 | BinaryOperatorKind Opc = ConvertTokenKindToBinaryOpcode(Kind); | |||
14630 | assert(LHSExpr && "ActOnBinOp(): missing left expression")(static_cast <bool> (LHSExpr && "ActOnBinOp(): missing left expression" ) ? void (0) : __assert_fail ("LHSExpr && \"ActOnBinOp(): missing left expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14630, __extension__ __PRETTY_FUNCTION__)); | |||
14631 | assert(RHSExpr && "ActOnBinOp(): missing right expression")(static_cast <bool> (RHSExpr && "ActOnBinOp(): missing right expression" ) ? void (0) : __assert_fail ("RHSExpr && \"ActOnBinOp(): missing right expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14631, __extension__ __PRETTY_FUNCTION__)); | |||
14632 | ||||
14633 | // Emit warnings for tricky precedence issues, e.g. "bitfield & 0x4 == 0" | |||
14634 | DiagnoseBinOpPrecedence(*this, Opc, TokLoc, LHSExpr, RHSExpr); | |||
14635 | ||||
14636 | return BuildBinOp(S, TokLoc, Opc, LHSExpr, RHSExpr); | |||
14637 | } | |||
14638 | ||||
14639 | void Sema::LookupBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, | |||
14640 | UnresolvedSetImpl &Functions) { | |||
14641 | OverloadedOperatorKind OverOp = BinaryOperator::getOverloadedOperator(Opc); | |||
14642 | if (OverOp != OO_None && OverOp != OO_Equal) | |||
14643 | LookupOverloadedOperatorName(OverOp, S, Functions); | |||
14644 | ||||
14645 | // In C++20 onwards, we may have a second operator to look up. | |||
14646 | if (getLangOpts().CPlusPlus20) { | |||
14647 | if (OverloadedOperatorKind ExtraOp = getRewrittenOverloadedOperator(OverOp)) | |||
14648 | LookupOverloadedOperatorName(ExtraOp, S, Functions); | |||
14649 | } | |||
14650 | } | |||
14651 | ||||
14652 | /// Build an overloaded binary operator expression in the given scope. | |||
14653 | static ExprResult BuildOverloadedBinOp(Sema &S, Scope *Sc, SourceLocation OpLoc, | |||
14654 | BinaryOperatorKind Opc, | |||
14655 | Expr *LHS, Expr *RHS) { | |||
14656 | switch (Opc) { | |||
14657 | case BO_Assign: | |||
14658 | case BO_DivAssign: | |||
14659 | case BO_RemAssign: | |||
14660 | case BO_SubAssign: | |||
14661 | case BO_AndAssign: | |||
14662 | case BO_OrAssign: | |||
14663 | case BO_XorAssign: | |||
14664 | DiagnoseSelfAssignment(S, LHS, RHS, OpLoc, false); | |||
14665 | CheckIdentityFieldAssignment(LHS, RHS, OpLoc, S); | |||
14666 | break; | |||
14667 | default: | |||
14668 | break; | |||
14669 | } | |||
14670 | ||||
14671 | // Find all of the overloaded operators visible from this point. | |||
14672 | UnresolvedSet<16> Functions; | |||
14673 | S.LookupBinOp(Sc, OpLoc, Opc, Functions); | |||
14674 | ||||
14675 | // Build the (potentially-overloaded, potentially-dependent) | |||
14676 | // binary operation. | |||
14677 | return S.CreateOverloadedBinOp(OpLoc, Opc, Functions, LHS, RHS); | |||
14678 | } | |||
14679 | ||||
14680 | ExprResult Sema::BuildBinOp(Scope *S, SourceLocation OpLoc, | |||
14681 | BinaryOperatorKind Opc, | |||
14682 | Expr *LHSExpr, Expr *RHSExpr) { | |||
14683 | ExprResult LHS, RHS; | |||
14684 | std::tie(LHS, RHS) = CorrectDelayedTyposInBinOp(*this, Opc, LHSExpr, RHSExpr); | |||
14685 | if (!LHS.isUsable() || !RHS.isUsable()) | |||
14686 | return ExprError(); | |||
14687 | LHSExpr = LHS.get(); | |||
14688 | RHSExpr = RHS.get(); | |||
14689 | ||||
14690 | // We want to end up calling one of checkPseudoObjectAssignment | |||
14691 | // (if the LHS is a pseudo-object), BuildOverloadedBinOp (if | |||
14692 | // both expressions are overloadable or either is type-dependent), | |||
14693 | // or CreateBuiltinBinOp (in any other case). We also want to get | |||
14694 | // any placeholder types out of the way. | |||
14695 | ||||
14696 | // Handle pseudo-objects in the LHS. | |||
14697 | if (const BuiltinType *pty = LHSExpr->getType()->getAsPlaceholderType()) { | |||
14698 | // Assignments with a pseudo-object l-value need special analysis. | |||
14699 | if (pty->getKind() == BuiltinType::PseudoObject && | |||
14700 | BinaryOperator::isAssignmentOp(Opc)) | |||
14701 | return checkPseudoObjectAssignment(S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14702 | ||||
14703 | // Don't resolve overloads if the other type is overloadable. | |||
14704 | if (getLangOpts().CPlusPlus && pty->getKind() == BuiltinType::Overload) { | |||
14705 | // We can't actually test that if we still have a placeholder, | |||
14706 | // though. Fortunately, none of the exceptions we see in that | |||
14707 | // code below are valid when the LHS is an overload set. Note | |||
14708 | // that an overload set can be dependently-typed, but it never | |||
14709 | // instantiates to having an overloadable type. | |||
14710 | ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr); | |||
14711 | if (resolvedRHS.isInvalid()) return ExprError(); | |||
14712 | RHSExpr = resolvedRHS.get(); | |||
14713 | ||||
14714 | if (RHSExpr->isTypeDependent() || | |||
14715 | RHSExpr->getType()->isOverloadableType()) | |||
14716 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14717 | } | |||
14718 | ||||
14719 | // If we're instantiating "a.x < b" or "A::x < b" and 'x' names a function | |||
14720 | // template, diagnose the missing 'template' keyword instead of diagnosing | |||
14721 | // an invalid use of a bound member function. | |||
14722 | // | |||
14723 | // Note that "A::x < b" might be valid if 'b' has an overloadable type due | |||
14724 | // to C++1z [over.over]/1.4, but we already checked for that case above. | |||
14725 | if (Opc == BO_LT && inTemplateInstantiation() && | |||
14726 | (pty->getKind() == BuiltinType::BoundMember || | |||
14727 | pty->getKind() == BuiltinType::Overload)) { | |||
14728 | auto *OE = dyn_cast<OverloadExpr>(LHSExpr); | |||
14729 | if (OE && !OE->hasTemplateKeyword() && !OE->hasExplicitTemplateArgs() && | |||
14730 | std::any_of(OE->decls_begin(), OE->decls_end(), [](NamedDecl *ND) { | |||
14731 | return isa<FunctionTemplateDecl>(ND); | |||
14732 | })) { | |||
14733 | Diag(OE->getQualifier() ? OE->getQualifierLoc().getBeginLoc() | |||
14734 | : OE->getNameLoc(), | |||
14735 | diag::err_template_kw_missing) | |||
14736 | << OE->getName().getAsString() << ""; | |||
14737 | return ExprError(); | |||
14738 | } | |||
14739 | } | |||
14740 | ||||
14741 | ExprResult LHS = CheckPlaceholderExpr(LHSExpr); | |||
14742 | if (LHS.isInvalid()) return ExprError(); | |||
14743 | LHSExpr = LHS.get(); | |||
14744 | } | |||
14745 | ||||
14746 | // Handle pseudo-objects in the RHS. | |||
14747 | if (const BuiltinType *pty = RHSExpr->getType()->getAsPlaceholderType()) { | |||
14748 | // An overload in the RHS can potentially be resolved by the type | |||
14749 | // being assigned to. | |||
14750 | if (Opc == BO_Assign && pty->getKind() == BuiltinType::Overload) { | |||
14751 | if (getLangOpts().CPlusPlus && | |||
14752 | (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent() || | |||
14753 | LHSExpr->getType()->isOverloadableType())) | |||
14754 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14755 | ||||
14756 | return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr); | |||
14757 | } | |||
14758 | ||||
14759 | // Don't resolve overloads if the other type is overloadable. | |||
14760 | if (getLangOpts().CPlusPlus && pty->getKind() == BuiltinType::Overload && | |||
14761 | LHSExpr->getType()->isOverloadableType()) | |||
14762 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14763 | ||||
14764 | ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr); | |||
14765 | if (!resolvedRHS.isUsable()) return ExprError(); | |||
14766 | RHSExpr = resolvedRHS.get(); | |||
14767 | } | |||
14768 | ||||
14769 | if (getLangOpts().CPlusPlus) { | |||
14770 | // If either expression is type-dependent, always build an | |||
14771 | // overloaded op. | |||
14772 | if (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent()) | |||
14773 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14774 | ||||
14775 | // Otherwise, build an overloaded op if either expression has an | |||
14776 | // overloadable type. | |||
14777 | if (LHSExpr->getType()->isOverloadableType() || | |||
14778 | RHSExpr->getType()->isOverloadableType()) | |||
14779 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
14780 | } | |||
14781 | ||||
14782 | if (getLangOpts().RecoveryAST && | |||
14783 | (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent())) { | |||
14784 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14784, __extension__ __PRETTY_FUNCTION__)); | |||
14785 | assert((LHSExpr->containsErrors() || RHSExpr->containsErrors()) &&(static_cast <bool> ((LHSExpr->containsErrors() || RHSExpr ->containsErrors()) && "Should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(LHSExpr->containsErrors() || RHSExpr->containsErrors()) && \"Should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14786, __extension__ __PRETTY_FUNCTION__)) | |||
14786 | "Should only occur in error-recovery path.")(static_cast <bool> ((LHSExpr->containsErrors() || RHSExpr ->containsErrors()) && "Should only occur in error-recovery path." ) ? void (0) : __assert_fail ("(LHSExpr->containsErrors() || RHSExpr->containsErrors()) && \"Should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 14786, __extension__ __PRETTY_FUNCTION__)); | |||
14787 | if (BinaryOperator::isCompoundAssignmentOp(Opc)) | |||
14788 | // C [6.15.16] p3: | |||
14789 | // An assignment expression has the value of the left operand after the | |||
14790 | // assignment, but is not an lvalue. | |||
14791 | return CompoundAssignOperator::Create( | |||
14792 | Context, LHSExpr, RHSExpr, Opc, | |||
14793 | LHSExpr->getType().getUnqualifiedType(), VK_PRValue, OK_Ordinary, | |||
14794 | OpLoc, CurFPFeatureOverrides()); | |||
14795 | QualType ResultType; | |||
14796 | switch (Opc) { | |||
14797 | case BO_Assign: | |||
14798 | ResultType = LHSExpr->getType().getUnqualifiedType(); | |||
14799 | break; | |||
14800 | case BO_LT: | |||
14801 | case BO_GT: | |||
14802 | case BO_LE: | |||
14803 | case BO_GE: | |||
14804 | case BO_EQ: | |||
14805 | case BO_NE: | |||
14806 | case BO_LAnd: | |||
14807 | case BO_LOr: | |||
14808 | // These operators have a fixed result type regardless of operands. | |||
14809 | ResultType = Context.IntTy; | |||
14810 | break; | |||
14811 | case BO_Comma: | |||
14812 | ResultType = RHSExpr->getType(); | |||
14813 | break; | |||
14814 | default: | |||
14815 | ResultType = Context.DependentTy; | |||
14816 | break; | |||
14817 | } | |||
14818 | return BinaryOperator::Create(Context, LHSExpr, RHSExpr, Opc, ResultType, | |||
14819 | VK_PRValue, OK_Ordinary, OpLoc, | |||
14820 | CurFPFeatureOverrides()); | |||
14821 | } | |||
14822 | ||||
14823 | // Build a built-in binary operation. | |||
14824 | return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr); | |||
14825 | } | |||
14826 | ||||
14827 | static bool isOverflowingIntegerType(ASTContext &Ctx, QualType T) { | |||
14828 | if (T.isNull() || T->isDependentType()) | |||
14829 | return false; | |||
14830 | ||||
14831 | if (!T->isPromotableIntegerType()) | |||
14832 | return true; | |||
14833 | ||||
14834 | return Ctx.getIntWidth(T) >= Ctx.getIntWidth(Ctx.IntTy); | |||
14835 | } | |||
14836 | ||||
14837 | ExprResult Sema::CreateBuiltinUnaryOp(SourceLocation OpLoc, | |||
14838 | UnaryOperatorKind Opc, | |||
14839 | Expr *InputExpr) { | |||
14840 | ExprResult Input = InputExpr; | |||
14841 | ExprValueKind VK = VK_PRValue; | |||
14842 | ExprObjectKind OK = OK_Ordinary; | |||
14843 | QualType resultType; | |||
14844 | bool CanOverflow = false; | |||
14845 | ||||
14846 | bool ConvertHalfVec = false; | |||
14847 | if (getLangOpts().OpenCL) { | |||
14848 | QualType Ty = InputExpr->getType(); | |||
14849 | // The only legal unary operation for atomics is '&'. | |||
14850 | if ((Opc != UO_AddrOf && Ty->isAtomicType()) || | |||
14851 | // OpenCL special types - image, sampler, pipe, and blocks are to be used | |||
14852 | // only with a builtin functions and therefore should be disallowed here. | |||
14853 | (Ty->isImageType() || Ty->isSamplerT() || Ty->isPipeType() | |||
14854 | || Ty->isBlockPointerType())) { | |||
14855 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14856 | << InputExpr->getType() | |||
14857 | << Input.get()->getSourceRange()); | |||
14858 | } | |||
14859 | } | |||
14860 | ||||
14861 | switch (Opc) { | |||
14862 | case UO_PreInc: | |||
14863 | case UO_PreDec: | |||
14864 | case UO_PostInc: | |||
14865 | case UO_PostDec: | |||
14866 | resultType = CheckIncrementDecrementOperand(*this, Input.get(), VK, OK, | |||
14867 | OpLoc, | |||
14868 | Opc == UO_PreInc || | |||
14869 | Opc == UO_PostInc, | |||
14870 | Opc == UO_PreInc || | |||
14871 | Opc == UO_PreDec); | |||
14872 | CanOverflow = isOverflowingIntegerType(Context, resultType); | |||
14873 | break; | |||
14874 | case UO_AddrOf: | |||
14875 | resultType = CheckAddressOfOperand(Input, OpLoc); | |||
14876 | CheckAddressOfNoDeref(InputExpr); | |||
14877 | RecordModifiableNonNullParam(*this, InputExpr); | |||
14878 | break; | |||
14879 | case UO_Deref: { | |||
14880 | Input = DefaultFunctionArrayLvalueConversion(Input.get()); | |||
14881 | if (Input.isInvalid()) return ExprError(); | |||
14882 | resultType = CheckIndirectionOperand(*this, Input.get(), VK, OpLoc); | |||
14883 | break; | |||
14884 | } | |||
14885 | case UO_Plus: | |||
14886 | case UO_Minus: | |||
14887 | CanOverflow = Opc == UO_Minus && | |||
14888 | isOverflowingIntegerType(Context, Input.get()->getType()); | |||
14889 | Input = UsualUnaryConversions(Input.get()); | |||
14890 | if (Input.isInvalid()) return ExprError(); | |||
14891 | // Unary plus and minus require promoting an operand of half vector to a | |||
14892 | // float vector and truncating the result back to a half vector. For now, we | |||
14893 | // do this only when HalfArgsAndReturns is set (that is, when the target is | |||
14894 | // arm or arm64). | |||
14895 | ConvertHalfVec = needsConversionOfHalfVec(true, Context, Input.get()); | |||
14896 | ||||
14897 | // If the operand is a half vector, promote it to a float vector. | |||
14898 | if (ConvertHalfVec) | |||
14899 | Input = convertVector(Input.get(), Context.FloatTy, *this); | |||
14900 | resultType = Input.get()->getType(); | |||
14901 | if (resultType->isDependentType()) | |||
14902 | break; | |||
14903 | if (resultType->isArithmeticType()) // C99 6.5.3.3p1 | |||
14904 | break; | |||
14905 | else if (resultType->isVectorType() && | |||
14906 | // The z vector extensions don't allow + or - with bool vectors. | |||
14907 | (!Context.getLangOpts().ZVector || | |||
14908 | resultType->castAs<VectorType>()->getVectorKind() != | |||
14909 | VectorType::AltiVecBool)) | |||
14910 | break; | |||
14911 | else if (getLangOpts().CPlusPlus && // C++ [expr.unary.op]p6 | |||
14912 | Opc == UO_Plus && | |||
14913 | resultType->isPointerType()) | |||
14914 | break; | |||
14915 | ||||
14916 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14917 | << resultType << Input.get()->getSourceRange()); | |||
14918 | ||||
14919 | case UO_Not: // bitwise complement | |||
14920 | Input = UsualUnaryConversions(Input.get()); | |||
14921 | if (Input.isInvalid()) | |||
14922 | return ExprError(); | |||
14923 | resultType = Input.get()->getType(); | |||
14924 | if (resultType->isDependentType()) | |||
14925 | break; | |||
14926 | // C99 6.5.3.3p1. We allow complex int and float as a GCC extension. | |||
14927 | if (resultType->isComplexType() || resultType->isComplexIntegerType()) | |||
14928 | // C99 does not support '~' for complex conjugation. | |||
14929 | Diag(OpLoc, diag::ext_integer_complement_complex) | |||
14930 | << resultType << Input.get()->getSourceRange(); | |||
14931 | else if (resultType->hasIntegerRepresentation()) | |||
14932 | break; | |||
14933 | else if (resultType->isExtVectorType() && Context.getLangOpts().OpenCL) { | |||
14934 | // OpenCL v1.1 s6.3.f: The bitwise operator not (~) does not operate | |||
14935 | // on vector float types. | |||
14936 | QualType T = resultType->castAs<ExtVectorType>()->getElementType(); | |||
14937 | if (!T->isIntegerType()) | |||
14938 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14939 | << resultType << Input.get()->getSourceRange()); | |||
14940 | } else { | |||
14941 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14942 | << resultType << Input.get()->getSourceRange()); | |||
14943 | } | |||
14944 | break; | |||
14945 | ||||
14946 | case UO_LNot: // logical negation | |||
14947 | // Unlike +/-/~, integer promotions aren't done here (C99 6.5.3.3p5). | |||
14948 | Input = DefaultFunctionArrayLvalueConversion(Input.get()); | |||
14949 | if (Input.isInvalid()) return ExprError(); | |||
14950 | resultType = Input.get()->getType(); | |||
14951 | ||||
14952 | // Though we still have to promote half FP to float... | |||
14953 | if (resultType->isHalfType() && !Context.getLangOpts().NativeHalfType) { | |||
14954 | Input = ImpCastExprToType(Input.get(), Context.FloatTy, CK_FloatingCast).get(); | |||
14955 | resultType = Context.FloatTy; | |||
14956 | } | |||
14957 | ||||
14958 | if (resultType->isDependentType()) | |||
14959 | break; | |||
14960 | if (resultType->isScalarType() && !isScopedEnumerationType(resultType)) { | |||
14961 | // C99 6.5.3.3p1: ok, fallthrough; | |||
14962 | if (Context.getLangOpts().CPlusPlus) { | |||
14963 | // C++03 [expr.unary.op]p8, C++0x [expr.unary.op]p9: | |||
14964 | // operand contextually converted to bool. | |||
14965 | Input = ImpCastExprToType(Input.get(), Context.BoolTy, | |||
14966 | ScalarTypeToBooleanCastKind(resultType)); | |||
14967 | } else if (Context.getLangOpts().OpenCL && | |||
14968 | Context.getLangOpts().OpenCLVersion < 120) { | |||
14969 | // OpenCL v1.1 6.3.h: The logical operator not (!) does not | |||
14970 | // operate on scalar float types. | |||
14971 | if (!resultType->isIntegerType() && !resultType->isPointerType()) | |||
14972 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14973 | << resultType << Input.get()->getSourceRange()); | |||
14974 | } | |||
14975 | } else if (resultType->isExtVectorType()) { | |||
14976 | if (Context.getLangOpts().OpenCL && | |||
14977 | Context.getLangOpts().OpenCLVersion < 120 && | |||
14978 | !Context.getLangOpts().OpenCLCPlusPlus) { | |||
14979 | // OpenCL v1.1 6.3.h: The logical operator not (!) does not | |||
14980 | // operate on vector float types. | |||
14981 | QualType T = resultType->castAs<ExtVectorType>()->getElementType(); | |||
14982 | if (!T->isIntegerType()) | |||
14983 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14984 | << resultType << Input.get()->getSourceRange()); | |||
14985 | } | |||
14986 | // Vector logical not returns the signed variant of the operand type. | |||
14987 | resultType = GetSignedVectorType(resultType); | |||
14988 | break; | |||
14989 | } else if (Context.getLangOpts().CPlusPlus && resultType->isVectorType()) { | |||
14990 | const VectorType *VTy = resultType->castAs<VectorType>(); | |||
14991 | if (VTy->getVectorKind() != VectorType::GenericVector) | |||
14992 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
14993 | << resultType << Input.get()->getSourceRange()); | |||
14994 | ||||
14995 | // Vector logical not returns the signed variant of the operand type. | |||
14996 | resultType = GetSignedVectorType(resultType); | |||
14997 | break; | |||
14998 | } else { | |||
14999 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
15000 | << resultType << Input.get()->getSourceRange()); | |||
15001 | } | |||
15002 | ||||
15003 | // LNot always has type int. C99 6.5.3.3p5. | |||
15004 | // In C++, it's bool. C++ 5.3.1p8 | |||
15005 | resultType = Context.getLogicalOperationType(); | |||
15006 | break; | |||
15007 | case UO_Real: | |||
15008 | case UO_Imag: | |||
15009 | resultType = CheckRealImagOperand(*this, Input, OpLoc, Opc == UO_Real); | |||
15010 | // _Real maps ordinary l-values into ordinary l-values. _Imag maps ordinary | |||
15011 | // complex l-values to ordinary l-values and all other values to r-values. | |||
15012 | if (Input.isInvalid()) return ExprError(); | |||
15013 | if (Opc == UO_Real || Input.get()->getType()->isAnyComplexType()) { | |||
15014 | if (Input.get()->isGLValue() && | |||
15015 | Input.get()->getObjectKind() == OK_Ordinary) | |||
15016 | VK = Input.get()->getValueKind(); | |||
15017 | } else if (!getLangOpts().CPlusPlus) { | |||
15018 | // In C, a volatile scalar is read by __imag. In C++, it is not. | |||
15019 | Input = DefaultLvalueConversion(Input.get()); | |||
15020 | } | |||
15021 | break; | |||
15022 | case UO_Extension: | |||
15023 | resultType = Input.get()->getType(); | |||
15024 | VK = Input.get()->getValueKind(); | |||
15025 | OK = Input.get()->getObjectKind(); | |||
15026 | break; | |||
15027 | case UO_Coawait: | |||
15028 | // It's unnecessary to represent the pass-through operator co_await in the | |||
15029 | // AST; just return the input expression instead. | |||
15030 | assert(!Input.get()->getType()->isDependentType() &&(static_cast <bool> (!Input.get()->getType()->isDependentType () && "the co_await expression must be non-dependant before " "building operator co_await") ? void (0) : __assert_fail ("!Input.get()->getType()->isDependentType() && \"the co_await expression must be non-dependant before \" \"building operator co_await\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15032, __extension__ __PRETTY_FUNCTION__)) | |||
15031 | "the co_await expression must be non-dependant before "(static_cast <bool> (!Input.get()->getType()->isDependentType () && "the co_await expression must be non-dependant before " "building operator co_await") ? void (0) : __assert_fail ("!Input.get()->getType()->isDependentType() && \"the co_await expression must be non-dependant before \" \"building operator co_await\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15032, __extension__ __PRETTY_FUNCTION__)) | |||
15032 | "building operator co_await")(static_cast <bool> (!Input.get()->getType()->isDependentType () && "the co_await expression must be non-dependant before " "building operator co_await") ? void (0) : __assert_fail ("!Input.get()->getType()->isDependentType() && \"the co_await expression must be non-dependant before \" \"building operator co_await\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15032, __extension__ __PRETTY_FUNCTION__)); | |||
15033 | return Input; | |||
15034 | } | |||
15035 | if (resultType.isNull() || Input.isInvalid()) | |||
15036 | return ExprError(); | |||
15037 | ||||
15038 | // Check for array bounds violations in the operand of the UnaryOperator, | |||
15039 | // except for the '*' and '&' operators that have to be handled specially | |||
15040 | // by CheckArrayAccess (as there are special cases like &array[arraysize] | |||
15041 | // that are explicitly defined as valid by the standard). | |||
15042 | if (Opc != UO_AddrOf && Opc != UO_Deref) | |||
15043 | CheckArrayAccess(Input.get()); | |||
15044 | ||||
15045 | auto *UO = | |||
15046 | UnaryOperator::Create(Context, Input.get(), Opc, resultType, VK, OK, | |||
15047 | OpLoc, CanOverflow, CurFPFeatureOverrides()); | |||
15048 | ||||
15049 | if (Opc == UO_Deref && UO->getType()->hasAttr(attr::NoDeref) && | |||
15050 | !isa<ArrayType>(UO->getType().getDesugaredType(Context)) && | |||
15051 | !isUnevaluatedContext()) | |||
15052 | ExprEvalContexts.back().PossibleDerefs.insert(UO); | |||
15053 | ||||
15054 | // Convert the result back to a half vector. | |||
15055 | if (ConvertHalfVec) | |||
15056 | return convertVector(UO, Context.HalfTy, *this); | |||
15057 | return UO; | |||
15058 | } | |||
15059 | ||||
15060 | /// Determine whether the given expression is a qualified member | |||
15061 | /// access expression, of a form that could be turned into a pointer to member | |||
15062 | /// with the address-of operator. | |||
15063 | bool Sema::isQualifiedMemberAccess(Expr *E) { | |||
15064 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
15065 | if (!DRE->getQualifier()) | |||
15066 | return false; | |||
15067 | ||||
15068 | ValueDecl *VD = DRE->getDecl(); | |||
15069 | if (!VD->isCXXClassMember()) | |||
15070 | return false; | |||
15071 | ||||
15072 | if (isa<FieldDecl>(VD) || isa<IndirectFieldDecl>(VD)) | |||
15073 | return true; | |||
15074 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(VD)) | |||
15075 | return Method->isInstance(); | |||
15076 | ||||
15077 | return false; | |||
15078 | } | |||
15079 | ||||
15080 | if (UnresolvedLookupExpr *ULE = dyn_cast<UnresolvedLookupExpr>(E)) { | |||
15081 | if (!ULE->getQualifier()) | |||
15082 | return false; | |||
15083 | ||||
15084 | for (NamedDecl *D : ULE->decls()) { | |||
15085 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
15086 | if (Method->isInstance()) | |||
15087 | return true; | |||
15088 | } else { | |||
15089 | // Overload set does not contain methods. | |||
15090 | break; | |||
15091 | } | |||
15092 | } | |||
15093 | ||||
15094 | return false; | |||
15095 | } | |||
15096 | ||||
15097 | return false; | |||
15098 | } | |||
15099 | ||||
15100 | ExprResult Sema::BuildUnaryOp(Scope *S, SourceLocation OpLoc, | |||
15101 | UnaryOperatorKind Opc, Expr *Input) { | |||
15102 | // First things first: handle placeholders so that the | |||
15103 | // overloaded-operator check considers the right type. | |||
15104 | if (const BuiltinType *pty = Input->getType()->getAsPlaceholderType()) { | |||
15105 | // Increment and decrement of pseudo-object references. | |||
15106 | if (pty->getKind() == BuiltinType::PseudoObject && | |||
15107 | UnaryOperator::isIncrementDecrementOp(Opc)) | |||
15108 | return checkPseudoObjectIncDec(S, OpLoc, Opc, Input); | |||
15109 | ||||
15110 | // extension is always a builtin operator. | |||
15111 | if (Opc == UO_Extension) | |||
15112 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input); | |||
15113 | ||||
15114 | // & gets special logic for several kinds of placeholder. | |||
15115 | // The builtin code knows what to do. | |||
15116 | if (Opc == UO_AddrOf && | |||
15117 | (pty->getKind() == BuiltinType::Overload || | |||
15118 | pty->getKind() == BuiltinType::UnknownAny || | |||
15119 | pty->getKind() == BuiltinType::BoundMember)) | |||
15120 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input); | |||
15121 | ||||
15122 | // Anything else needs to be handled now. | |||
15123 | ExprResult Result = CheckPlaceholderExpr(Input); | |||
15124 | if (Result.isInvalid()) return ExprError(); | |||
15125 | Input = Result.get(); | |||
15126 | } | |||
15127 | ||||
15128 | if (getLangOpts().CPlusPlus && Input->getType()->isOverloadableType() && | |||
15129 | UnaryOperator::getOverloadedOperator(Opc) != OO_None && | |||
15130 | !(Opc == UO_AddrOf && isQualifiedMemberAccess(Input))) { | |||
15131 | // Find all of the overloaded operators visible from this point. | |||
15132 | UnresolvedSet<16> Functions; | |||
15133 | OverloadedOperatorKind OverOp = UnaryOperator::getOverloadedOperator(Opc); | |||
15134 | if (S && OverOp != OO_None) | |||
15135 | LookupOverloadedOperatorName(OverOp, S, Functions); | |||
15136 | ||||
15137 | return CreateOverloadedUnaryOp(OpLoc, Opc, Functions, Input); | |||
15138 | } | |||
15139 | ||||
15140 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input); | |||
15141 | } | |||
15142 | ||||
15143 | // Unary Operators. 'Tok' is the token for the operator. | |||
15144 | ExprResult Sema::ActOnUnaryOp(Scope *S, SourceLocation OpLoc, | |||
15145 | tok::TokenKind Op, Expr *Input) { | |||
15146 | return BuildUnaryOp(S, OpLoc, ConvertTokenKindToUnaryOpcode(Op), Input); | |||
15147 | } | |||
15148 | ||||
15149 | /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". | |||
15150 | ExprResult Sema::ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, | |||
15151 | LabelDecl *TheDecl) { | |||
15152 | TheDecl->markUsed(Context); | |||
15153 | // Create the AST node. The address of a label always has type 'void*'. | |||
15154 | return new (Context) AddrLabelExpr(OpLoc, LabLoc, TheDecl, | |||
15155 | Context.getPointerType(Context.VoidTy)); | |||
15156 | } | |||
15157 | ||||
15158 | void Sema::ActOnStartStmtExpr() { | |||
15159 | PushExpressionEvaluationContext(ExprEvalContexts.back().Context); | |||
15160 | } | |||
15161 | ||||
15162 | void Sema::ActOnStmtExprError() { | |||
15163 | // Note that function is also called by TreeTransform when leaving a | |||
15164 | // StmtExpr scope without rebuilding anything. | |||
15165 | ||||
15166 | DiscardCleanupsInEvaluationContext(); | |||
15167 | PopExpressionEvaluationContext(); | |||
15168 | } | |||
15169 | ||||
15170 | ExprResult Sema::ActOnStmtExpr(Scope *S, SourceLocation LPLoc, Stmt *SubStmt, | |||
15171 | SourceLocation RPLoc) { | |||
15172 | return BuildStmtExpr(LPLoc, SubStmt, RPLoc, getTemplateDepth(S)); | |||
15173 | } | |||
15174 | ||||
15175 | ExprResult Sema::BuildStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, | |||
15176 | SourceLocation RPLoc, unsigned TemplateDepth) { | |||
15177 | assert(SubStmt && isa<CompoundStmt>(SubStmt) && "Invalid action invocation!")(static_cast <bool> (SubStmt && isa<CompoundStmt >(SubStmt) && "Invalid action invocation!") ? void (0) : __assert_fail ("SubStmt && isa<CompoundStmt>(SubStmt) && \"Invalid action invocation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15177, __extension__ __PRETTY_FUNCTION__)); | |||
15178 | CompoundStmt *Compound = cast<CompoundStmt>(SubStmt); | |||
15179 | ||||
15180 | if (hasAnyUnrecoverableErrorsInThisFunction()) | |||
15181 | DiscardCleanupsInEvaluationContext(); | |||
15182 | assert(!Cleanup.exprNeedsCleanups() &&(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "cleanups within StmtExpr not correctly bound!") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"cleanups within StmtExpr not correctly bound!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15183, __extension__ __PRETTY_FUNCTION__)) | |||
15183 | "cleanups within StmtExpr not correctly bound!")(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "cleanups within StmtExpr not correctly bound!") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"cleanups within StmtExpr not correctly bound!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15183, __extension__ __PRETTY_FUNCTION__)); | |||
15184 | PopExpressionEvaluationContext(); | |||
15185 | ||||
15186 | // FIXME: there are a variety of strange constraints to enforce here, for | |||
15187 | // example, it is not possible to goto into a stmt expression apparently. | |||
15188 | // More semantic analysis is needed. | |||
15189 | ||||
15190 | // If there are sub-stmts in the compound stmt, take the type of the last one | |||
15191 | // as the type of the stmtexpr. | |||
15192 | QualType Ty = Context.VoidTy; | |||
15193 | bool StmtExprMayBindToTemp = false; | |||
15194 | if (!Compound->body_empty()) { | |||
15195 | // For GCC compatibility we get the last Stmt excluding trailing NullStmts. | |||
15196 | if (const auto *LastStmt = | |||
15197 | dyn_cast<ValueStmt>(Compound->getStmtExprResult())) { | |||
15198 | if (const Expr *Value = LastStmt->getExprStmt()) { | |||
15199 | StmtExprMayBindToTemp = true; | |||
15200 | Ty = Value->getType(); | |||
15201 | } | |||
15202 | } | |||
15203 | } | |||
15204 | ||||
15205 | // FIXME: Check that expression type is complete/non-abstract; statement | |||
15206 | // expressions are not lvalues. | |||
15207 | Expr *ResStmtExpr = | |||
15208 | new (Context) StmtExpr(Compound, Ty, LPLoc, RPLoc, TemplateDepth); | |||
15209 | if (StmtExprMayBindToTemp) | |||
15210 | return MaybeBindToTemporary(ResStmtExpr); | |||
15211 | return ResStmtExpr; | |||
15212 | } | |||
15213 | ||||
15214 | ExprResult Sema::ActOnStmtExprResult(ExprResult ER) { | |||
15215 | if (ER.isInvalid()) | |||
15216 | return ExprError(); | |||
15217 | ||||
15218 | // Do function/array conversion on the last expression, but not | |||
15219 | // lvalue-to-rvalue. However, initialize an unqualified type. | |||
15220 | ER = DefaultFunctionArrayConversion(ER.get()); | |||
15221 | if (ER.isInvalid()) | |||
15222 | return ExprError(); | |||
15223 | Expr *E = ER.get(); | |||
15224 | ||||
15225 | if (E->isTypeDependent()) | |||
15226 | return E; | |||
15227 | ||||
15228 | // In ARC, if the final expression ends in a consume, splice | |||
15229 | // the consume out and bind it later. In the alternate case | |||
15230 | // (when dealing with a retainable type), the result | |||
15231 | // initialization will create a produce. In both cases the | |||
15232 | // result will be +1, and we'll need to balance that out with | |||
15233 | // a bind. | |||
15234 | auto *Cast = dyn_cast<ImplicitCastExpr>(E); | |||
15235 | if (Cast && Cast->getCastKind() == CK_ARCConsumeObject) | |||
15236 | return Cast->getSubExpr(); | |||
15237 | ||||
15238 | // FIXME: Provide a better location for the initialization. | |||
15239 | return PerformCopyInitialization( | |||
15240 | InitializedEntity::InitializeStmtExprResult( | |||
15241 | E->getBeginLoc(), E->getType().getUnqualifiedType()), | |||
15242 | SourceLocation(), E); | |||
15243 | } | |||
15244 | ||||
15245 | ExprResult Sema::BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, | |||
15246 | TypeSourceInfo *TInfo, | |||
15247 | ArrayRef<OffsetOfComponent> Components, | |||
15248 | SourceLocation RParenLoc) { | |||
15249 | QualType ArgTy = TInfo->getType(); | |||
15250 | bool Dependent = ArgTy->isDependentType(); | |||
15251 | SourceRange TypeRange = TInfo->getTypeLoc().getLocalSourceRange(); | |||
15252 | ||||
15253 | // We must have at least one component that refers to the type, and the first | |||
15254 | // one is known to be a field designator. Verify that the ArgTy represents | |||
15255 | // a struct/union/class. | |||
15256 | if (!Dependent && !ArgTy->isRecordType()) | |||
15257 | return ExprError(Diag(BuiltinLoc, diag::err_offsetof_record_type) | |||
15258 | << ArgTy << TypeRange); | |||
15259 | ||||
15260 | // Type must be complete per C99 7.17p3 because a declaring a variable | |||
15261 | // with an incomplete type would be ill-formed. | |||
15262 | if (!Dependent | |||
15263 | && RequireCompleteType(BuiltinLoc, ArgTy, | |||
15264 | diag::err_offsetof_incomplete_type, TypeRange)) | |||
15265 | return ExprError(); | |||
15266 | ||||
15267 | bool DidWarnAboutNonPOD = false; | |||
15268 | QualType CurrentType = ArgTy; | |||
15269 | SmallVector<OffsetOfNode, 4> Comps; | |||
15270 | SmallVector<Expr*, 4> Exprs; | |||
15271 | for (const OffsetOfComponent &OC : Components) { | |||
15272 | if (OC.isBrackets) { | |||
15273 | // Offset of an array sub-field. TODO: Should we allow vector elements? | |||
15274 | if (!CurrentType->isDependentType()) { | |||
15275 | const ArrayType *AT = Context.getAsArrayType(CurrentType); | |||
15276 | if(!AT) | |||
15277 | return ExprError(Diag(OC.LocEnd, diag::err_offsetof_array_type) | |||
15278 | << CurrentType); | |||
15279 | CurrentType = AT->getElementType(); | |||
15280 | } else | |||
15281 | CurrentType = Context.DependentTy; | |||
15282 | ||||
15283 | ExprResult IdxRval = DefaultLvalueConversion(static_cast<Expr*>(OC.U.E)); | |||
15284 | if (IdxRval.isInvalid()) | |||
15285 | return ExprError(); | |||
15286 | Expr *Idx = IdxRval.get(); | |||
15287 | ||||
15288 | // The expression must be an integral expression. | |||
15289 | // FIXME: An integral constant expression? | |||
15290 | if (!Idx->isTypeDependent() && !Idx->isValueDependent() && | |||
15291 | !Idx->getType()->isIntegerType()) | |||
15292 | return ExprError( | |||
15293 | Diag(Idx->getBeginLoc(), diag::err_typecheck_subscript_not_integer) | |||
15294 | << Idx->getSourceRange()); | |||
15295 | ||||
15296 | // Record this array index. | |||
15297 | Comps.push_back(OffsetOfNode(OC.LocStart, Exprs.size(), OC.LocEnd)); | |||
15298 | Exprs.push_back(Idx); | |||
15299 | continue; | |||
15300 | } | |||
15301 | ||||
15302 | // Offset of a field. | |||
15303 | if (CurrentType->isDependentType()) { | |||
15304 | // We have the offset of a field, but we can't look into the dependent | |||
15305 | // type. Just record the identifier of the field. | |||
15306 | Comps.push_back(OffsetOfNode(OC.LocStart, OC.U.IdentInfo, OC.LocEnd)); | |||
15307 | CurrentType = Context.DependentTy; | |||
15308 | continue; | |||
15309 | } | |||
15310 | ||||
15311 | // We need to have a complete type to look into. | |||
15312 | if (RequireCompleteType(OC.LocStart, CurrentType, | |||
15313 | diag::err_offsetof_incomplete_type)) | |||
15314 | return ExprError(); | |||
15315 | ||||
15316 | // Look for the designated field. | |||
15317 | const RecordType *RC = CurrentType->getAs<RecordType>(); | |||
15318 | if (!RC) | |||
15319 | return ExprError(Diag(OC.LocEnd, diag::err_offsetof_record_type) | |||
15320 | << CurrentType); | |||
15321 | RecordDecl *RD = RC->getDecl(); | |||
15322 | ||||
15323 | // C++ [lib.support.types]p5: | |||
15324 | // The macro offsetof accepts a restricted set of type arguments in this | |||
15325 | // International Standard. type shall be a POD structure or a POD union | |||
15326 | // (clause 9). | |||
15327 | // C++11 [support.types]p4: | |||
15328 | // If type is not a standard-layout class (Clause 9), the results are | |||
15329 | // undefined. | |||
15330 | if (CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { | |||
15331 | bool IsSafe = LangOpts.CPlusPlus11? CRD->isStandardLayout() : CRD->isPOD(); | |||
15332 | unsigned DiagID = | |||
15333 | LangOpts.CPlusPlus11? diag::ext_offsetof_non_standardlayout_type | |||
15334 | : diag::ext_offsetof_non_pod_type; | |||
15335 | ||||
15336 | if (!IsSafe && !DidWarnAboutNonPOD && | |||
15337 | DiagRuntimeBehavior(BuiltinLoc, nullptr, | |||
15338 | PDiag(DiagID) | |||
15339 | << SourceRange(Components[0].LocStart, OC.LocEnd) | |||
15340 | << CurrentType)) | |||
15341 | DidWarnAboutNonPOD = true; | |||
15342 | } | |||
15343 | ||||
15344 | // Look for the field. | |||
15345 | LookupResult R(*this, OC.U.IdentInfo, OC.LocStart, LookupMemberName); | |||
15346 | LookupQualifiedName(R, RD); | |||
15347 | FieldDecl *MemberDecl = R.getAsSingle<FieldDecl>(); | |||
15348 | IndirectFieldDecl *IndirectMemberDecl = nullptr; | |||
15349 | if (!MemberDecl) { | |||
15350 | if ((IndirectMemberDecl = R.getAsSingle<IndirectFieldDecl>())) | |||
15351 | MemberDecl = IndirectMemberDecl->getAnonField(); | |||
15352 | } | |||
15353 | ||||
15354 | if (!MemberDecl) | |||
15355 | return ExprError(Diag(BuiltinLoc, diag::err_no_member) | |||
15356 | << OC.U.IdentInfo << RD << SourceRange(OC.LocStart, | |||
15357 | OC.LocEnd)); | |||
15358 | ||||
15359 | // C99 7.17p3: | |||
15360 | // (If the specified member is a bit-field, the behavior is undefined.) | |||
15361 | // | |||
15362 | // We diagnose this as an error. | |||
15363 | if (MemberDecl->isBitField()) { | |||
15364 | Diag(OC.LocEnd, diag::err_offsetof_bitfield) | |||
15365 | << MemberDecl->getDeclName() | |||
15366 | << SourceRange(BuiltinLoc, RParenLoc); | |||
15367 | Diag(MemberDecl->getLocation(), diag::note_bitfield_decl); | |||
15368 | return ExprError(); | |||
15369 | } | |||
15370 | ||||
15371 | RecordDecl *Parent = MemberDecl->getParent(); | |||
15372 | if (IndirectMemberDecl) | |||
15373 | Parent = cast<RecordDecl>(IndirectMemberDecl->getDeclContext()); | |||
15374 | ||||
15375 | // If the member was found in a base class, introduce OffsetOfNodes for | |||
15376 | // the base class indirections. | |||
15377 | CXXBasePaths Paths; | |||
15378 | if (IsDerivedFrom(OC.LocStart, CurrentType, Context.getTypeDeclType(Parent), | |||
15379 | Paths)) { | |||
15380 | if (Paths.getDetectedVirtual()) { | |||
15381 | Diag(OC.LocEnd, diag::err_offsetof_field_of_virtual_base) | |||
15382 | << MemberDecl->getDeclName() | |||
15383 | << SourceRange(BuiltinLoc, RParenLoc); | |||
15384 | return ExprError(); | |||
15385 | } | |||
15386 | ||||
15387 | CXXBasePath &Path = Paths.front(); | |||
15388 | for (const CXXBasePathElement &B : Path) | |||
15389 | Comps.push_back(OffsetOfNode(B.Base)); | |||
15390 | } | |||
15391 | ||||
15392 | if (IndirectMemberDecl) { | |||
15393 | for (auto *FI : IndirectMemberDecl->chain()) { | |||
15394 | assert(isa<FieldDecl>(FI))(static_cast <bool> (isa<FieldDecl>(FI)) ? void ( 0) : __assert_fail ("isa<FieldDecl>(FI)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15394, __extension__ __PRETTY_FUNCTION__)); | |||
15395 | Comps.push_back(OffsetOfNode(OC.LocStart, | |||
15396 | cast<FieldDecl>(FI), OC.LocEnd)); | |||
15397 | } | |||
15398 | } else | |||
15399 | Comps.push_back(OffsetOfNode(OC.LocStart, MemberDecl, OC.LocEnd)); | |||
15400 | ||||
15401 | CurrentType = MemberDecl->getType().getNonReferenceType(); | |||
15402 | } | |||
15403 | ||||
15404 | return OffsetOfExpr::Create(Context, Context.getSizeType(), BuiltinLoc, TInfo, | |||
15405 | Comps, Exprs, RParenLoc); | |||
15406 | } | |||
15407 | ||||
15408 | ExprResult Sema::ActOnBuiltinOffsetOf(Scope *S, | |||
15409 | SourceLocation BuiltinLoc, | |||
15410 | SourceLocation TypeLoc, | |||
15411 | ParsedType ParsedArgTy, | |||
15412 | ArrayRef<OffsetOfComponent> Components, | |||
15413 | SourceLocation RParenLoc) { | |||
15414 | ||||
15415 | TypeSourceInfo *ArgTInfo; | |||
15416 | QualType ArgTy = GetTypeFromParser(ParsedArgTy, &ArgTInfo); | |||
15417 | if (ArgTy.isNull()) | |||
15418 | return ExprError(); | |||
15419 | ||||
15420 | if (!ArgTInfo) | |||
15421 | ArgTInfo = Context.getTrivialTypeSourceInfo(ArgTy, TypeLoc); | |||
15422 | ||||
15423 | return BuildBuiltinOffsetOf(BuiltinLoc, ArgTInfo, Components, RParenLoc); | |||
15424 | } | |||
15425 | ||||
15426 | ||||
15427 | ExprResult Sema::ActOnChooseExpr(SourceLocation BuiltinLoc, | |||
15428 | Expr *CondExpr, | |||
15429 | Expr *LHSExpr, Expr *RHSExpr, | |||
15430 | SourceLocation RPLoc) { | |||
15431 | assert((CondExpr && LHSExpr && RHSExpr) && "Missing type argument(s)")(static_cast <bool> ((CondExpr && LHSExpr && RHSExpr) && "Missing type argument(s)") ? void (0) : __assert_fail ("(CondExpr && LHSExpr && RHSExpr) && \"Missing type argument(s)\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15431, __extension__ __PRETTY_FUNCTION__)); | |||
15432 | ||||
15433 | ExprValueKind VK = VK_PRValue; | |||
15434 | ExprObjectKind OK = OK_Ordinary; | |||
15435 | QualType resType; | |||
15436 | bool CondIsTrue = false; | |||
15437 | if (CondExpr->isTypeDependent() || CondExpr->isValueDependent()) { | |||
15438 | resType = Context.DependentTy; | |||
15439 | } else { | |||
15440 | // The conditional expression is required to be a constant expression. | |||
15441 | llvm::APSInt condEval(32); | |||
15442 | ExprResult CondICE = VerifyIntegerConstantExpression( | |||
15443 | CondExpr, &condEval, diag::err_typecheck_choose_expr_requires_constant); | |||
15444 | if (CondICE.isInvalid()) | |||
15445 | return ExprError(); | |||
15446 | CondExpr = CondICE.get(); | |||
15447 | CondIsTrue = condEval.getZExtValue(); | |||
15448 | ||||
15449 | // If the condition is > zero, then the AST type is the same as the LHSExpr. | |||
15450 | Expr *ActiveExpr = CondIsTrue ? LHSExpr : RHSExpr; | |||
15451 | ||||
15452 | resType = ActiveExpr->getType(); | |||
15453 | VK = ActiveExpr->getValueKind(); | |||
15454 | OK = ActiveExpr->getObjectKind(); | |||
15455 | } | |||
15456 | ||||
15457 | return new (Context) ChooseExpr(BuiltinLoc, CondExpr, LHSExpr, RHSExpr, | |||
15458 | resType, VK, OK, RPLoc, CondIsTrue); | |||
15459 | } | |||
15460 | ||||
15461 | //===----------------------------------------------------------------------===// | |||
15462 | // Clang Extensions. | |||
15463 | //===----------------------------------------------------------------------===// | |||
15464 | ||||
15465 | /// ActOnBlockStart - This callback is invoked when a block literal is started. | |||
15466 | void Sema::ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope) { | |||
15467 | BlockDecl *Block = BlockDecl::Create(Context, CurContext, CaretLoc); | |||
15468 | ||||
15469 | if (LangOpts.CPlusPlus) { | |||
15470 | MangleNumberingContext *MCtx; | |||
15471 | Decl *ManglingContextDecl; | |||
15472 | std::tie(MCtx, ManglingContextDecl) = | |||
15473 | getCurrentMangleNumberContext(Block->getDeclContext()); | |||
15474 | if (MCtx) { | |||
15475 | unsigned ManglingNumber = MCtx->getManglingNumber(Block); | |||
15476 | Block->setBlockMangling(ManglingNumber, ManglingContextDecl); | |||
15477 | } | |||
15478 | } | |||
15479 | ||||
15480 | PushBlockScope(CurScope, Block); | |||
15481 | CurContext->addDecl(Block); | |||
15482 | if (CurScope) | |||
15483 | PushDeclContext(CurScope, Block); | |||
15484 | else | |||
15485 | CurContext = Block; | |||
15486 | ||||
15487 | getCurBlock()->HasImplicitReturnType = true; | |||
15488 | ||||
15489 | // Enter a new evaluation context to insulate the block from any | |||
15490 | // cleanups from the enclosing full-expression. | |||
15491 | PushExpressionEvaluationContext( | |||
15492 | ExpressionEvaluationContext::PotentiallyEvaluated); | |||
15493 | } | |||
15494 | ||||
15495 | void Sema::ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo, | |||
15496 | Scope *CurScope) { | |||
15497 | assert(ParamInfo.getIdentifier() == nullptr &&(static_cast <bool> (ParamInfo.getIdentifier() == nullptr && "block-id should have no identifier!") ? void (0) : __assert_fail ("ParamInfo.getIdentifier() == nullptr && \"block-id should have no identifier!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15498, __extension__ __PRETTY_FUNCTION__)) | |||
15498 | "block-id should have no identifier!")(static_cast <bool> (ParamInfo.getIdentifier() == nullptr && "block-id should have no identifier!") ? void (0) : __assert_fail ("ParamInfo.getIdentifier() == nullptr && \"block-id should have no identifier!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15498, __extension__ __PRETTY_FUNCTION__)); | |||
15499 | assert(ParamInfo.getContext() == DeclaratorContext::BlockLiteral)(static_cast <bool> (ParamInfo.getContext() == DeclaratorContext ::BlockLiteral) ? void (0) : __assert_fail ("ParamInfo.getContext() == DeclaratorContext::BlockLiteral" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15499, __extension__ __PRETTY_FUNCTION__)); | |||
15500 | BlockScopeInfo *CurBlock = getCurBlock(); | |||
15501 | ||||
15502 | TypeSourceInfo *Sig = GetTypeForDeclarator(ParamInfo, CurScope); | |||
15503 | QualType T = Sig->getType(); | |||
15504 | ||||
15505 | // FIXME: We should allow unexpanded parameter packs here, but that would, | |||
15506 | // in turn, make the block expression contain unexpanded parameter packs. | |||
15507 | if (DiagnoseUnexpandedParameterPack(CaretLoc, Sig, UPPC_Block)) { | |||
15508 | // Drop the parameters. | |||
15509 | FunctionProtoType::ExtProtoInfo EPI; | |||
15510 | EPI.HasTrailingReturn = false; | |||
15511 | EPI.TypeQuals.addConst(); | |||
15512 | T = Context.getFunctionType(Context.DependentTy, None, EPI); | |||
15513 | Sig = Context.getTrivialTypeSourceInfo(T); | |||
15514 | } | |||
15515 | ||||
15516 | // GetTypeForDeclarator always produces a function type for a block | |||
15517 | // literal signature. Furthermore, it is always a FunctionProtoType | |||
15518 | // unless the function was written with a typedef. | |||
15519 | assert(T->isFunctionType() &&(static_cast <bool> (T->isFunctionType() && "GetTypeForDeclarator made a non-function block signature" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"GetTypeForDeclarator made a non-function block signature\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15520, __extension__ __PRETTY_FUNCTION__)) | |||
15520 | "GetTypeForDeclarator made a non-function block signature")(static_cast <bool> (T->isFunctionType() && "GetTypeForDeclarator made a non-function block signature" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"GetTypeForDeclarator made a non-function block signature\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15520, __extension__ __PRETTY_FUNCTION__)); | |||
15521 | ||||
15522 | // Look for an explicit signature in that function type. | |||
15523 | FunctionProtoTypeLoc ExplicitSignature; | |||
15524 | ||||
15525 | if ((ExplicitSignature = Sig->getTypeLoc() | |||
15526 | .getAsAdjusted<FunctionProtoTypeLoc>())) { | |||
15527 | ||||
15528 | // Check whether that explicit signature was synthesized by | |||
15529 | // GetTypeForDeclarator. If so, don't save that as part of the | |||
15530 | // written signature. | |||
15531 | if (ExplicitSignature.getLocalRangeBegin() == | |||
15532 | ExplicitSignature.getLocalRangeEnd()) { | |||
15533 | // This would be much cheaper if we stored TypeLocs instead of | |||
15534 | // TypeSourceInfos. | |||
15535 | TypeLoc Result = ExplicitSignature.getReturnLoc(); | |||
15536 | unsigned Size = Result.getFullDataSize(); | |||
15537 | Sig = Context.CreateTypeSourceInfo(Result.getType(), Size); | |||
15538 | Sig->getTypeLoc().initializeFullCopy(Result, Size); | |||
15539 | ||||
15540 | ExplicitSignature = FunctionProtoTypeLoc(); | |||
15541 | } | |||
15542 | } | |||
15543 | ||||
15544 | CurBlock->TheDecl->setSignatureAsWritten(Sig); | |||
15545 | CurBlock->FunctionType = T; | |||
15546 | ||||
15547 | const auto *Fn = T->castAs<FunctionType>(); | |||
15548 | QualType RetTy = Fn->getReturnType(); | |||
15549 | bool isVariadic = | |||
15550 | (isa<FunctionProtoType>(Fn) && cast<FunctionProtoType>(Fn)->isVariadic()); | |||
15551 | ||||
15552 | CurBlock->TheDecl->setIsVariadic(isVariadic); | |||
15553 | ||||
15554 | // Context.DependentTy is used as a placeholder for a missing block | |||
15555 | // return type. TODO: what should we do with declarators like: | |||
15556 | // ^ * { ... } | |||
15557 | // If the answer is "apply template argument deduction".... | |||
15558 | if (RetTy != Context.DependentTy) { | |||
15559 | CurBlock->ReturnType = RetTy; | |||
15560 | CurBlock->TheDecl->setBlockMissingReturnType(false); | |||
15561 | CurBlock->HasImplicitReturnType = false; | |||
15562 | } | |||
15563 | ||||
15564 | // Push block parameters from the declarator if we had them. | |||
15565 | SmallVector<ParmVarDecl*, 8> Params; | |||
15566 | if (ExplicitSignature) { | |||
15567 | for (unsigned I = 0, E = ExplicitSignature.getNumParams(); I != E; ++I) { | |||
15568 | ParmVarDecl *Param = ExplicitSignature.getParam(I); | |||
15569 | if (Param->getIdentifier() == nullptr && !Param->isImplicit() && | |||
15570 | !Param->isInvalidDecl() && !getLangOpts().CPlusPlus) { | |||
15571 | // Diagnose this as an extension in C17 and earlier. | |||
15572 | if (!getLangOpts().C2x) | |||
15573 | Diag(Param->getLocation(), diag::ext_parameter_name_omitted_c2x); | |||
15574 | } | |||
15575 | Params.push_back(Param); | |||
15576 | } | |||
15577 | ||||
15578 | // Fake up parameter variables if we have a typedef, like | |||
15579 | // ^ fntype { ... } | |||
15580 | } else if (const FunctionProtoType *Fn = T->getAs<FunctionProtoType>()) { | |||
15581 | for (const auto &I : Fn->param_types()) { | |||
15582 | ParmVarDecl *Param = BuildParmVarDeclForTypedef( | |||
15583 | CurBlock->TheDecl, ParamInfo.getBeginLoc(), I); | |||
15584 | Params.push_back(Param); | |||
15585 | } | |||
15586 | } | |||
15587 | ||||
15588 | // Set the parameters on the block decl. | |||
15589 | if (!Params.empty()) { | |||
15590 | CurBlock->TheDecl->setParams(Params); | |||
15591 | CheckParmsForFunctionDef(CurBlock->TheDecl->parameters(), | |||
15592 | /*CheckParameterNames=*/false); | |||
15593 | } | |||
15594 | ||||
15595 | // Finally we can process decl attributes. | |||
15596 | ProcessDeclAttributes(CurScope, CurBlock->TheDecl, ParamInfo); | |||
15597 | ||||
15598 | // Put the parameter variables in scope. | |||
15599 | for (auto AI : CurBlock->TheDecl->parameters()) { | |||
15600 | AI->setOwningFunction(CurBlock->TheDecl); | |||
15601 | ||||
15602 | // If this has an identifier, add it to the scope stack. | |||
15603 | if (AI->getIdentifier()) { | |||
15604 | CheckShadow(CurBlock->TheScope, AI); | |||
15605 | ||||
15606 | PushOnScopeChains(AI, CurBlock->TheScope); | |||
15607 | } | |||
15608 | } | |||
15609 | } | |||
15610 | ||||
15611 | /// ActOnBlockError - If there is an error parsing a block, this callback | |||
15612 | /// is invoked to pop the information about the block from the action impl. | |||
15613 | void Sema::ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope) { | |||
15614 | // Leave the expression-evaluation context. | |||
15615 | DiscardCleanupsInEvaluationContext(); | |||
15616 | PopExpressionEvaluationContext(); | |||
15617 | ||||
15618 | // Pop off CurBlock, handle nested blocks. | |||
15619 | PopDeclContext(); | |||
15620 | PopFunctionScopeInfo(); | |||
15621 | } | |||
15622 | ||||
15623 | /// ActOnBlockStmtExpr - This is called when the body of a block statement | |||
15624 | /// literal was successfully completed. ^(int x){...} | |||
15625 | ExprResult Sema::ActOnBlockStmtExpr(SourceLocation CaretLoc, | |||
15626 | Stmt *Body, Scope *CurScope) { | |||
15627 | // If blocks are disabled, emit an error. | |||
15628 | if (!LangOpts.Blocks) | |||
15629 | Diag(CaretLoc, diag::err_blocks_disable) << LangOpts.OpenCL; | |||
15630 | ||||
15631 | // Leave the expression-evaluation context. | |||
15632 | if (hasAnyUnrecoverableErrorsInThisFunction()) | |||
15633 | DiscardCleanupsInEvaluationContext(); | |||
15634 | assert(!Cleanup.exprNeedsCleanups() &&(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "cleanups within block not correctly bound!") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"cleanups within block not correctly bound!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15635, __extension__ __PRETTY_FUNCTION__)) | |||
15635 | "cleanups within block not correctly bound!")(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "cleanups within block not correctly bound!") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"cleanups within block not correctly bound!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15635, __extension__ __PRETTY_FUNCTION__)); | |||
15636 | PopExpressionEvaluationContext(); | |||
15637 | ||||
15638 | BlockScopeInfo *BSI = cast<BlockScopeInfo>(FunctionScopes.back()); | |||
15639 | BlockDecl *BD = BSI->TheDecl; | |||
15640 | ||||
15641 | if (BSI->HasImplicitReturnType) | |||
15642 | deduceClosureReturnType(*BSI); | |||
15643 | ||||
15644 | QualType RetTy = Context.VoidTy; | |||
15645 | if (!BSI->ReturnType.isNull()) | |||
15646 | RetTy = BSI->ReturnType; | |||
15647 | ||||
15648 | bool NoReturn = BD->hasAttr<NoReturnAttr>(); | |||
15649 | QualType BlockTy; | |||
15650 | ||||
15651 | // If the user wrote a function type in some form, try to use that. | |||
15652 | if (!BSI->FunctionType.isNull()) { | |||
15653 | const FunctionType *FTy = BSI->FunctionType->castAs<FunctionType>(); | |||
15654 | ||||
15655 | FunctionType::ExtInfo Ext = FTy->getExtInfo(); | |||
15656 | if (NoReturn && !Ext.getNoReturn()) Ext = Ext.withNoReturn(true); | |||
15657 | ||||
15658 | // Turn protoless block types into nullary block types. | |||
15659 | if (isa<FunctionNoProtoType>(FTy)) { | |||
15660 | FunctionProtoType::ExtProtoInfo EPI; | |||
15661 | EPI.ExtInfo = Ext; | |||
15662 | BlockTy = Context.getFunctionType(RetTy, None, EPI); | |||
15663 | ||||
15664 | // Otherwise, if we don't need to change anything about the function type, | |||
15665 | // preserve its sugar structure. | |||
15666 | } else if (FTy->getReturnType() == RetTy && | |||
15667 | (!NoReturn || FTy->getNoReturnAttr())) { | |||
15668 | BlockTy = BSI->FunctionType; | |||
15669 | ||||
15670 | // Otherwise, make the minimal modifications to the function type. | |||
15671 | } else { | |||
15672 | const FunctionProtoType *FPT = cast<FunctionProtoType>(FTy); | |||
15673 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | |||
15674 | EPI.TypeQuals = Qualifiers(); | |||
15675 | EPI.ExtInfo = Ext; | |||
15676 | BlockTy = Context.getFunctionType(RetTy, FPT->getParamTypes(), EPI); | |||
15677 | } | |||
15678 | ||||
15679 | // If we don't have a function type, just build one from nothing. | |||
15680 | } else { | |||
15681 | FunctionProtoType::ExtProtoInfo EPI; | |||
15682 | EPI.ExtInfo = FunctionType::ExtInfo().withNoReturn(NoReturn); | |||
15683 | BlockTy = Context.getFunctionType(RetTy, None, EPI); | |||
15684 | } | |||
15685 | ||||
15686 | DiagnoseUnusedParameters(BD->parameters()); | |||
15687 | BlockTy = Context.getBlockPointerType(BlockTy); | |||
15688 | ||||
15689 | // If needed, diagnose invalid gotos and switches in the block. | |||
15690 | if (getCurFunction()->NeedsScopeChecking() && | |||
15691 | !PP.isCodeCompletionEnabled()) | |||
15692 | DiagnoseInvalidJumps(cast<CompoundStmt>(Body)); | |||
15693 | ||||
15694 | BD->setBody(cast<CompoundStmt>(Body)); | |||
15695 | ||||
15696 | if (Body && getCurFunction()->HasPotentialAvailabilityViolations) | |||
15697 | DiagnoseUnguardedAvailabilityViolations(BD); | |||
15698 | ||||
15699 | // Try to apply the named return value optimization. We have to check again | |||
15700 | // if we can do this, though, because blocks keep return statements around | |||
15701 | // to deduce an implicit return type. | |||
15702 | if (getLangOpts().CPlusPlus && RetTy->isRecordType() && | |||
15703 | !BD->isDependentContext()) | |||
15704 | computeNRVO(Body, BSI); | |||
15705 | ||||
15706 | if (RetTy.hasNonTrivialToPrimitiveDestructCUnion() || | |||
15707 | RetTy.hasNonTrivialToPrimitiveCopyCUnion()) | |||
15708 | checkNonTrivialCUnion(RetTy, BD->getCaretLocation(), NTCUC_FunctionReturn, | |||
15709 | NTCUK_Destruct|NTCUK_Copy); | |||
15710 | ||||
15711 | PopDeclContext(); | |||
15712 | ||||
15713 | // Set the captured variables on the block. | |||
15714 | SmallVector<BlockDecl::Capture, 4> Captures; | |||
15715 | for (Capture &Cap : BSI->Captures) { | |||
15716 | if (Cap.isInvalid() || Cap.isThisCapture()) | |||
15717 | continue; | |||
15718 | ||||
15719 | VarDecl *Var = Cap.getVariable(); | |||
15720 | Expr *CopyExpr = nullptr; | |||
15721 | if (getLangOpts().CPlusPlus && Cap.isCopyCapture()) { | |||
15722 | if (const RecordType *Record = | |||
15723 | Cap.getCaptureType()->getAs<RecordType>()) { | |||
15724 | // The capture logic needs the destructor, so make sure we mark it. | |||
15725 | // Usually this is unnecessary because most local variables have | |||
15726 | // their destructors marked at declaration time, but parameters are | |||
15727 | // an exception because it's technically only the call site that | |||
15728 | // actually requires the destructor. | |||
15729 | if (isa<ParmVarDecl>(Var)) | |||
15730 | FinalizeVarWithDestructor(Var, Record); | |||
15731 | ||||
15732 | // Enter a separate potentially-evaluated context while building block | |||
15733 | // initializers to isolate their cleanups from those of the block | |||
15734 | // itself. | |||
15735 | // FIXME: Is this appropriate even when the block itself occurs in an | |||
15736 | // unevaluated operand? | |||
15737 | EnterExpressionEvaluationContext EvalContext( | |||
15738 | *this, ExpressionEvaluationContext::PotentiallyEvaluated); | |||
15739 | ||||
15740 | SourceLocation Loc = Cap.getLocation(); | |||
15741 | ||||
15742 | ExprResult Result = BuildDeclarationNameExpr( | |||
15743 | CXXScopeSpec(), DeclarationNameInfo(Var->getDeclName(), Loc), Var); | |||
15744 | ||||
15745 | // According to the blocks spec, the capture of a variable from | |||
15746 | // the stack requires a const copy constructor. This is not true | |||
15747 | // of the copy/move done to move a __block variable to the heap. | |||
15748 | if (!Result.isInvalid() && | |||
15749 | !Result.get()->getType().isConstQualified()) { | |||
15750 | Result = ImpCastExprToType(Result.get(), | |||
15751 | Result.get()->getType().withConst(), | |||
15752 | CK_NoOp, VK_LValue); | |||
15753 | } | |||
15754 | ||||
15755 | if (!Result.isInvalid()) { | |||
15756 | Result = PerformCopyInitialization( | |||
15757 | InitializedEntity::InitializeBlock(Var->getLocation(), | |||
15758 | Cap.getCaptureType(), false), | |||
15759 | Loc, Result.get()); | |||
15760 | } | |||
15761 | ||||
15762 | // Build a full-expression copy expression if initialization | |||
15763 | // succeeded and used a non-trivial constructor. Recover from | |||
15764 | // errors by pretending that the copy isn't necessary. | |||
15765 | if (!Result.isInvalid() && | |||
15766 | !cast<CXXConstructExpr>(Result.get())->getConstructor() | |||
15767 | ->isTrivial()) { | |||
15768 | Result = MaybeCreateExprWithCleanups(Result); | |||
15769 | CopyExpr = Result.get(); | |||
15770 | } | |||
15771 | } | |||
15772 | } | |||
15773 | ||||
15774 | BlockDecl::Capture NewCap(Var, Cap.isBlockCapture(), Cap.isNested(), | |||
15775 | CopyExpr); | |||
15776 | Captures.push_back(NewCap); | |||
15777 | } | |||
15778 | BD->setCaptures(Context, Captures, BSI->CXXThisCaptureIndex != 0); | |||
15779 | ||||
15780 | // Pop the block scope now but keep it alive to the end of this function. | |||
15781 | AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); | |||
15782 | PoppedFunctionScopePtr ScopeRAII = PopFunctionScopeInfo(&WP, BD, BlockTy); | |||
15783 | ||||
15784 | BlockExpr *Result = new (Context) BlockExpr(BD, BlockTy); | |||
15785 | ||||
15786 | // If the block isn't obviously global, i.e. it captures anything at | |||
15787 | // all, then we need to do a few things in the surrounding context: | |||
15788 | if (Result->getBlockDecl()->hasCaptures()) { | |||
15789 | // First, this expression has a new cleanup object. | |||
15790 | ExprCleanupObjects.push_back(Result->getBlockDecl()); | |||
15791 | Cleanup.setExprNeedsCleanups(true); | |||
15792 | ||||
15793 | // It also gets a branch-protected scope if any of the captured | |||
15794 | // variables needs destruction. | |||
15795 | for (const auto &CI : Result->getBlockDecl()->captures()) { | |||
15796 | const VarDecl *var = CI.getVariable(); | |||
15797 | if (var->getType().isDestructedType() != QualType::DK_none) { | |||
15798 | setFunctionHasBranchProtectedScope(); | |||
15799 | break; | |||
15800 | } | |||
15801 | } | |||
15802 | } | |||
15803 | ||||
15804 | if (getCurFunction()) | |||
15805 | getCurFunction()->addBlock(BD); | |||
15806 | ||||
15807 | return Result; | |||
15808 | } | |||
15809 | ||||
15810 | ExprResult Sema::ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, | |||
15811 | SourceLocation RPLoc) { | |||
15812 | TypeSourceInfo *TInfo; | |||
15813 | GetTypeFromParser(Ty, &TInfo); | |||
15814 | return BuildVAArgExpr(BuiltinLoc, E, TInfo, RPLoc); | |||
15815 | } | |||
15816 | ||||
15817 | ExprResult Sema::BuildVAArgExpr(SourceLocation BuiltinLoc, | |||
15818 | Expr *E, TypeSourceInfo *TInfo, | |||
15819 | SourceLocation RPLoc) { | |||
15820 | Expr *OrigExpr = E; | |||
15821 | bool IsMS = false; | |||
15822 | ||||
15823 | // CUDA device code does not support varargs. | |||
15824 | if (getLangOpts().CUDA && getLangOpts().CUDAIsDevice) { | |||
15825 | if (const FunctionDecl *F = dyn_cast<FunctionDecl>(CurContext)) { | |||
15826 | CUDAFunctionTarget T = IdentifyCUDATarget(F); | |||
15827 | if (T == CFT_Global || T == CFT_Device || T == CFT_HostDevice) | |||
15828 | return ExprError(Diag(E->getBeginLoc(), diag::err_va_arg_in_device)); | |||
15829 | } | |||
15830 | } | |||
15831 | ||||
15832 | // NVPTX does not support va_arg expression. | |||
15833 | if (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && | |||
15834 | Context.getTargetInfo().getTriple().isNVPTX()) | |||
15835 | targetDiag(E->getBeginLoc(), diag::err_va_arg_in_device); | |||
15836 | ||||
15837 | // It might be a __builtin_ms_va_list. (But don't ever mark a va_arg() | |||
15838 | // as Microsoft ABI on an actual Microsoft platform, where | |||
15839 | // __builtin_ms_va_list and __builtin_va_list are the same.) | |||
15840 | if (!E->isTypeDependent() && Context.getTargetInfo().hasBuiltinMSVaList() && | |||
15841 | Context.getTargetInfo().getBuiltinVaListKind() != TargetInfo::CharPtrBuiltinVaList) { | |||
15842 | QualType MSVaListType = Context.getBuiltinMSVaListType(); | |||
15843 | if (Context.hasSameType(MSVaListType, E->getType())) { | |||
15844 | if (CheckForModifiableLvalue(E, BuiltinLoc, *this)) | |||
15845 | return ExprError(); | |||
15846 | IsMS = true; | |||
15847 | } | |||
15848 | } | |||
15849 | ||||
15850 | // Get the va_list type | |||
15851 | QualType VaListType = Context.getBuiltinVaListType(); | |||
15852 | if (!IsMS) { | |||
15853 | if (VaListType->isArrayType()) { | |||
15854 | // Deal with implicit array decay; for example, on x86-64, | |||
15855 | // va_list is an array, but it's supposed to decay to | |||
15856 | // a pointer for va_arg. | |||
15857 | VaListType = Context.getArrayDecayedType(VaListType); | |||
15858 | // Make sure the input expression also decays appropriately. | |||
15859 | ExprResult Result = UsualUnaryConversions(E); | |||
15860 | if (Result.isInvalid()) | |||
15861 | return ExprError(); | |||
15862 | E = Result.get(); | |||
15863 | } else if (VaListType->isRecordType() && getLangOpts().CPlusPlus) { | |||
15864 | // If va_list is a record type and we are compiling in C++ mode, | |||
15865 | // check the argument using reference binding. | |||
15866 | InitializedEntity Entity = InitializedEntity::InitializeParameter( | |||
15867 | Context, Context.getLValueReferenceType(VaListType), false); | |||
15868 | ExprResult Init = PerformCopyInitialization(Entity, SourceLocation(), E); | |||
15869 | if (Init.isInvalid()) | |||
15870 | return ExprError(); | |||
15871 | E = Init.getAs<Expr>(); | |||
15872 | } else { | |||
15873 | // Otherwise, the va_list argument must be an l-value because | |||
15874 | // it is modified by va_arg. | |||
15875 | if (!E->isTypeDependent() && | |||
15876 | CheckForModifiableLvalue(E, BuiltinLoc, *this)) | |||
15877 | return ExprError(); | |||
15878 | } | |||
15879 | } | |||
15880 | ||||
15881 | if (!IsMS && !E->isTypeDependent() && | |||
15882 | !Context.hasSameType(VaListType, E->getType())) | |||
15883 | return ExprError( | |||
15884 | Diag(E->getBeginLoc(), | |||
15885 | diag::err_first_argument_to_va_arg_not_of_type_va_list) | |||
15886 | << OrigExpr->getType() << E->getSourceRange()); | |||
15887 | ||||
15888 | if (!TInfo->getType()->isDependentType()) { | |||
15889 | if (RequireCompleteType(TInfo->getTypeLoc().getBeginLoc(), TInfo->getType(), | |||
15890 | diag::err_second_parameter_to_va_arg_incomplete, | |||
15891 | TInfo->getTypeLoc())) | |||
15892 | return ExprError(); | |||
15893 | ||||
15894 | if (RequireNonAbstractType(TInfo->getTypeLoc().getBeginLoc(), | |||
15895 | TInfo->getType(), | |||
15896 | diag::err_second_parameter_to_va_arg_abstract, | |||
15897 | TInfo->getTypeLoc())) | |||
15898 | return ExprError(); | |||
15899 | ||||
15900 | if (!TInfo->getType().isPODType(Context)) { | |||
15901 | Diag(TInfo->getTypeLoc().getBeginLoc(), | |||
15902 | TInfo->getType()->isObjCLifetimeType() | |||
15903 | ? diag::warn_second_parameter_to_va_arg_ownership_qualified | |||
15904 | : diag::warn_second_parameter_to_va_arg_not_pod) | |||
15905 | << TInfo->getType() | |||
15906 | << TInfo->getTypeLoc().getSourceRange(); | |||
15907 | } | |||
15908 | ||||
15909 | // Check for va_arg where arguments of the given type will be promoted | |||
15910 | // (i.e. this va_arg is guaranteed to have undefined behavior). | |||
15911 | QualType PromoteType; | |||
15912 | if (TInfo->getType()->isPromotableIntegerType()) { | |||
15913 | PromoteType = Context.getPromotedIntegerType(TInfo->getType()); | |||
15914 | // [cstdarg.syn]p1 defers the C++ behavior to what the C standard says, | |||
15915 | // and C2x 7.16.1.1p2 says, in part: | |||
15916 | // If type is not compatible with the type of the actual next argument | |||
15917 | // (as promoted according to the default argument promotions), the | |||
15918 | // behavior is undefined, except for the following cases: | |||
15919 | // - both types are pointers to qualified or unqualified versions of | |||
15920 | // compatible types; | |||
15921 | // - one type is a signed integer type, the other type is the | |||
15922 | // corresponding unsigned integer type, and the value is | |||
15923 | // representable in both types; | |||
15924 | // - one type is pointer to qualified or unqualified void and the | |||
15925 | // other is a pointer to a qualified or unqualified character type. | |||
15926 | // Given that type compatibility is the primary requirement (ignoring | |||
15927 | // qualifications), you would think we could call typesAreCompatible() | |||
15928 | // directly to test this. However, in C++, that checks for *same type*, | |||
15929 | // which causes false positives when passing an enumeration type to | |||
15930 | // va_arg. Instead, get the underlying type of the enumeration and pass | |||
15931 | // that. | |||
15932 | QualType UnderlyingType = TInfo->getType(); | |||
15933 | if (const auto *ET = UnderlyingType->getAs<EnumType>()) | |||
15934 | UnderlyingType = ET->getDecl()->getIntegerType(); | |||
15935 | if (Context.typesAreCompatible(PromoteType, UnderlyingType, | |||
15936 | /*CompareUnqualified*/ true)) | |||
15937 | PromoteType = QualType(); | |||
15938 | ||||
15939 | // If the types are still not compatible, we need to test whether the | |||
15940 | // promoted type and the underlying type are the same except for | |||
15941 | // signedness. Ask the AST for the correctly corresponding type and see | |||
15942 | // if that's compatible. | |||
15943 | if (!PromoteType.isNull() && | |||
15944 | PromoteType->isUnsignedIntegerType() != | |||
15945 | UnderlyingType->isUnsignedIntegerType()) { | |||
15946 | UnderlyingType = | |||
15947 | UnderlyingType->isUnsignedIntegerType() | |||
15948 | ? Context.getCorrespondingSignedType(UnderlyingType) | |||
15949 | : Context.getCorrespondingUnsignedType(UnderlyingType); | |||
15950 | if (Context.typesAreCompatible(PromoteType, UnderlyingType, | |||
15951 | /*CompareUnqualified*/ true)) | |||
15952 | PromoteType = QualType(); | |||
15953 | } | |||
15954 | } | |||
15955 | if (TInfo->getType()->isSpecificBuiltinType(BuiltinType::Float)) | |||
15956 | PromoteType = Context.DoubleTy; | |||
15957 | if (!PromoteType.isNull()) | |||
15958 | DiagRuntimeBehavior(TInfo->getTypeLoc().getBeginLoc(), E, | |||
15959 | PDiag(diag::warn_second_parameter_to_va_arg_never_compatible) | |||
15960 | << TInfo->getType() | |||
15961 | << PromoteType | |||
15962 | << TInfo->getTypeLoc().getSourceRange()); | |||
15963 | } | |||
15964 | ||||
15965 | QualType T = TInfo->getType().getNonLValueExprType(Context); | |||
15966 | return new (Context) VAArgExpr(BuiltinLoc, E, TInfo, RPLoc, T, IsMS); | |||
15967 | } | |||
15968 | ||||
15969 | ExprResult Sema::ActOnGNUNullExpr(SourceLocation TokenLoc) { | |||
15970 | // The type of __null will be int or long, depending on the size of | |||
15971 | // pointers on the target. | |||
15972 | QualType Ty; | |||
15973 | unsigned pw = Context.getTargetInfo().getPointerWidth(0); | |||
15974 | if (pw == Context.getTargetInfo().getIntWidth()) | |||
15975 | Ty = Context.IntTy; | |||
15976 | else if (pw == Context.getTargetInfo().getLongWidth()) | |||
15977 | Ty = Context.LongTy; | |||
15978 | else if (pw == Context.getTargetInfo().getLongLongWidth()) | |||
15979 | Ty = Context.LongLongTy; | |||
15980 | else { | |||
15981 | llvm_unreachable("I don't know size of pointer!")::llvm::llvm_unreachable_internal("I don't know size of pointer!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 15981); | |||
15982 | } | |||
15983 | ||||
15984 | return new (Context) GNUNullExpr(Ty, TokenLoc); | |||
15985 | } | |||
15986 | ||||
15987 | ExprResult Sema::ActOnSourceLocExpr(SourceLocExpr::IdentKind Kind, | |||
15988 | SourceLocation BuiltinLoc, | |||
15989 | SourceLocation RPLoc) { | |||
15990 | return BuildSourceLocExpr(Kind, BuiltinLoc, RPLoc, CurContext); | |||
15991 | } | |||
15992 | ||||
15993 | ExprResult Sema::BuildSourceLocExpr(SourceLocExpr::IdentKind Kind, | |||
15994 | SourceLocation BuiltinLoc, | |||
15995 | SourceLocation RPLoc, | |||
15996 | DeclContext *ParentContext) { | |||
15997 | return new (Context) | |||
15998 | SourceLocExpr(Context, Kind, BuiltinLoc, RPLoc, ParentContext); | |||
15999 | } | |||
16000 | ||||
16001 | bool Sema::CheckConversionToObjCLiteral(QualType DstType, Expr *&Exp, | |||
16002 | bool Diagnose) { | |||
16003 | if (!getLangOpts().ObjC) | |||
16004 | return false; | |||
16005 | ||||
16006 | const ObjCObjectPointerType *PT = DstType->getAs<ObjCObjectPointerType>(); | |||
16007 | if (!PT) | |||
16008 | return false; | |||
16009 | const ObjCInterfaceDecl *ID = PT->getInterfaceDecl(); | |||
16010 | ||||
16011 | // Ignore any parens, implicit casts (should only be | |||
16012 | // array-to-pointer decays), and not-so-opaque values. The last is | |||
16013 | // important for making this trigger for property assignments. | |||
16014 | Expr *SrcExpr = Exp->IgnoreParenImpCasts(); | |||
16015 | if (OpaqueValueExpr *OV = dyn_cast<OpaqueValueExpr>(SrcExpr)) | |||
16016 | if (OV->getSourceExpr()) | |||
16017 | SrcExpr = OV->getSourceExpr()->IgnoreParenImpCasts(); | |||
16018 | ||||
16019 | if (auto *SL = dyn_cast<StringLiteral>(SrcExpr)) { | |||
16020 | if (!PT->isObjCIdType() && | |||
16021 | !(ID && ID->getIdentifier()->isStr("NSString"))) | |||
16022 | return false; | |||
16023 | if (!SL->isAscii()) | |||
16024 | return false; | |||
16025 | ||||
16026 | if (Diagnose) { | |||
16027 | Diag(SL->getBeginLoc(), diag::err_missing_atsign_prefix) | |||
16028 | << /*string*/0 << FixItHint::CreateInsertion(SL->getBeginLoc(), "@"); | |||
16029 | Exp = BuildObjCStringLiteral(SL->getBeginLoc(), SL).get(); | |||
16030 | } | |||
16031 | return true; | |||
16032 | } | |||
16033 | ||||
16034 | if ((isa<IntegerLiteral>(SrcExpr) || isa<CharacterLiteral>(SrcExpr) || | |||
16035 | isa<FloatingLiteral>(SrcExpr) || isa<ObjCBoolLiteralExpr>(SrcExpr) || | |||
16036 | isa<CXXBoolLiteralExpr>(SrcExpr)) && | |||
16037 | !SrcExpr->isNullPointerConstant( | |||
16038 | getASTContext(), Expr::NPC_NeverValueDependent)) { | |||
16039 | if (!ID || !ID->getIdentifier()->isStr("NSNumber")) | |||
16040 | return false; | |||
16041 | if (Diagnose) { | |||
16042 | Diag(SrcExpr->getBeginLoc(), diag::err_missing_atsign_prefix) | |||
16043 | << /*number*/1 | |||
16044 | << FixItHint::CreateInsertion(SrcExpr->getBeginLoc(), "@"); | |||
16045 | Expr *NumLit = | |||
16046 | BuildObjCNumericLiteral(SrcExpr->getBeginLoc(), SrcExpr).get(); | |||
16047 | if (NumLit) | |||
16048 | Exp = NumLit; | |||
16049 | } | |||
16050 | return true; | |||
16051 | } | |||
16052 | ||||
16053 | return false; | |||
16054 | } | |||
16055 | ||||
16056 | static bool maybeDiagnoseAssignmentToFunction(Sema &S, QualType DstType, | |||
16057 | const Expr *SrcExpr) { | |||
16058 | if (!DstType->isFunctionPointerType() || | |||
16059 | !SrcExpr->getType()->isFunctionType()) | |||
16060 | return false; | |||
16061 | ||||
16062 | auto *DRE = dyn_cast<DeclRefExpr>(SrcExpr->IgnoreParenImpCasts()); | |||
16063 | if (!DRE) | |||
16064 | return false; | |||
16065 | ||||
16066 | auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl()); | |||
16067 | if (!FD) | |||
16068 | return false; | |||
16069 | ||||
16070 | return !S.checkAddressOfFunctionIsAvailable(FD, | |||
16071 | /*Complain=*/true, | |||
16072 | SrcExpr->getBeginLoc()); | |||
16073 | } | |||
16074 | ||||
16075 | bool Sema::DiagnoseAssignmentResult(AssignConvertType ConvTy, | |||
16076 | SourceLocation Loc, | |||
16077 | QualType DstType, QualType SrcType, | |||
16078 | Expr *SrcExpr, AssignmentAction Action, | |||
16079 | bool *Complained) { | |||
16080 | if (Complained) | |||
16081 | *Complained = false; | |||
16082 | ||||
16083 | // Decode the result (notice that AST's are still created for extensions). | |||
16084 | bool CheckInferredResultType = false; | |||
16085 | bool isInvalid = false; | |||
16086 | unsigned DiagKind = 0; | |||
16087 | ConversionFixItGenerator ConvHints; | |||
16088 | bool MayHaveConvFixit = false; | |||
16089 | bool MayHaveFunctionDiff = false; | |||
16090 | const ObjCInterfaceDecl *IFace = nullptr; | |||
16091 | const ObjCProtocolDecl *PDecl = nullptr; | |||
16092 | ||||
16093 | switch (ConvTy) { | |||
16094 | case Compatible: | |||
16095 | DiagnoseAssignmentEnum(DstType, SrcType, SrcExpr); | |||
16096 | return false; | |||
16097 | ||||
16098 | case PointerToInt: | |||
16099 | if (getLangOpts().CPlusPlus) { | |||
16100 | DiagKind = diag::err_typecheck_convert_pointer_int; | |||
16101 | isInvalid = true; | |||
16102 | } else { | |||
16103 | DiagKind = diag::ext_typecheck_convert_pointer_int; | |||
16104 | } | |||
16105 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
16106 | MayHaveConvFixit = true; | |||
16107 | break; | |||
16108 | case IntToPointer: | |||
16109 | if (getLangOpts().CPlusPlus) { | |||
16110 | DiagKind = diag::err_typecheck_convert_int_pointer; | |||
16111 | isInvalid = true; | |||
16112 | } else { | |||
16113 | DiagKind = diag::ext_typecheck_convert_int_pointer; | |||
16114 | } | |||
16115 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
16116 | MayHaveConvFixit = true; | |||
16117 | break; | |||
16118 | case IncompatibleFunctionPointer: | |||
16119 | if (getLangOpts().CPlusPlus) { | |||
16120 | DiagKind = diag::err_typecheck_convert_incompatible_function_pointer; | |||
16121 | isInvalid = true; | |||
16122 | } else { | |||
16123 | DiagKind = diag::ext_typecheck_convert_incompatible_function_pointer; | |||
16124 | } | |||
16125 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
16126 | MayHaveConvFixit = true; | |||
16127 | break; | |||
16128 | case IncompatiblePointer: | |||
16129 | if (Action == AA_Passing_CFAudited) { | |||
16130 | DiagKind = diag::err_arc_typecheck_convert_incompatible_pointer; | |||
16131 | } else if (getLangOpts().CPlusPlus) { | |||
16132 | DiagKind = diag::err_typecheck_convert_incompatible_pointer; | |||
16133 | isInvalid = true; | |||
16134 | } else { | |||
16135 | DiagKind = diag::ext_typecheck_convert_incompatible_pointer; | |||
16136 | } | |||
16137 | CheckInferredResultType = DstType->isObjCObjectPointerType() && | |||
16138 | SrcType->isObjCObjectPointerType(); | |||
16139 | if (!CheckInferredResultType) { | |||
16140 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
16141 | } else if (CheckInferredResultType) { | |||
16142 | SrcType = SrcType.getUnqualifiedType(); | |||
16143 | DstType = DstType.getUnqualifiedType(); | |||
16144 | } | |||
16145 | MayHaveConvFixit = true; | |||
16146 | break; | |||
16147 | case IncompatiblePointerSign: | |||
16148 | if (getLangOpts().CPlusPlus) { | |||
16149 | DiagKind = diag::err_typecheck_convert_incompatible_pointer_sign; | |||
16150 | isInvalid = true; | |||
16151 | } else { | |||
16152 | DiagKind = diag::ext_typecheck_convert_incompatible_pointer_sign; | |||
16153 | } | |||
16154 | break; | |||
16155 | case FunctionVoidPointer: | |||
16156 | if (getLangOpts().CPlusPlus) { | |||
16157 | DiagKind = diag::err_typecheck_convert_pointer_void_func; | |||
16158 | isInvalid = true; | |||
16159 | } else { | |||
16160 | DiagKind = diag::ext_typecheck_convert_pointer_void_func; | |||
16161 | } | |||
16162 | break; | |||
16163 | case IncompatiblePointerDiscardsQualifiers: { | |||
16164 | // Perform array-to-pointer decay if necessary. | |||
16165 | if (SrcType->isArrayType()) SrcType = Context.getArrayDecayedType(SrcType); | |||
16166 | ||||
16167 | isInvalid = true; | |||
16168 | ||||
16169 | Qualifiers lhq = SrcType->getPointeeType().getQualifiers(); | |||
16170 | Qualifiers rhq = DstType->getPointeeType().getQualifiers(); | |||
16171 | if (lhq.getAddressSpace() != rhq.getAddressSpace()) { | |||
16172 | DiagKind = diag::err_typecheck_incompatible_address_space; | |||
16173 | break; | |||
16174 | ||||
16175 | } else if (lhq.getObjCLifetime() != rhq.getObjCLifetime()) { | |||
16176 | DiagKind = diag::err_typecheck_incompatible_ownership; | |||
16177 | break; | |||
16178 | } | |||
16179 | ||||
16180 | llvm_unreachable("unknown error case for discarding qualifiers!")::llvm::llvm_unreachable_internal("unknown error case for discarding qualifiers!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16180); | |||
16181 | // fallthrough | |||
16182 | } | |||
16183 | case CompatiblePointerDiscardsQualifiers: | |||
16184 | // If the qualifiers lost were because we were applying the | |||
16185 | // (deprecated) C++ conversion from a string literal to a char* | |||
16186 | // (or wchar_t*), then there was no error (C++ 4.2p2). FIXME: | |||
16187 | // Ideally, this check would be performed in | |||
16188 | // checkPointerTypesForAssignment. However, that would require a | |||
16189 | // bit of refactoring (so that the second argument is an | |||
16190 | // expression, rather than a type), which should be done as part | |||
16191 | // of a larger effort to fix checkPointerTypesForAssignment for | |||
16192 | // C++ semantics. | |||
16193 | if (getLangOpts().CPlusPlus && | |||
16194 | IsStringLiteralToNonConstPointerConversion(SrcExpr, DstType)) | |||
16195 | return false; | |||
16196 | if (getLangOpts().CPlusPlus) { | |||
16197 | DiagKind = diag::err_typecheck_convert_discards_qualifiers; | |||
16198 | isInvalid = true; | |||
16199 | } else { | |||
16200 | DiagKind = diag::ext_typecheck_convert_discards_qualifiers; | |||
16201 | } | |||
16202 | ||||
16203 | break; | |||
16204 | case IncompatibleNestedPointerQualifiers: | |||
16205 | if (getLangOpts().CPlusPlus) { | |||
16206 | isInvalid = true; | |||
16207 | DiagKind = diag::err_nested_pointer_qualifier_mismatch; | |||
16208 | } else { | |||
16209 | DiagKind = diag::ext_nested_pointer_qualifier_mismatch; | |||
16210 | } | |||
16211 | break; | |||
16212 | case IncompatibleNestedPointerAddressSpaceMismatch: | |||
16213 | DiagKind = diag::err_typecheck_incompatible_nested_address_space; | |||
16214 | isInvalid = true; | |||
16215 | break; | |||
16216 | case IntToBlockPointer: | |||
16217 | DiagKind = diag::err_int_to_block_pointer; | |||
16218 | isInvalid = true; | |||
16219 | break; | |||
16220 | case IncompatibleBlockPointer: | |||
16221 | DiagKind = diag::err_typecheck_convert_incompatible_block_pointer; | |||
16222 | isInvalid = true; | |||
16223 | break; | |||
16224 | case IncompatibleObjCQualifiedId: { | |||
16225 | if (SrcType->isObjCQualifiedIdType()) { | |||
16226 | const ObjCObjectPointerType *srcOPT = | |||
16227 | SrcType->castAs<ObjCObjectPointerType>(); | |||
16228 | for (auto *srcProto : srcOPT->quals()) { | |||
16229 | PDecl = srcProto; | |||
16230 | break; | |||
16231 | } | |||
16232 | if (const ObjCInterfaceType *IFaceT = | |||
16233 | DstType->castAs<ObjCObjectPointerType>()->getInterfaceType()) | |||
16234 | IFace = IFaceT->getDecl(); | |||
16235 | } | |||
16236 | else if (DstType->isObjCQualifiedIdType()) { | |||
16237 | const ObjCObjectPointerType *dstOPT = | |||
16238 | DstType->castAs<ObjCObjectPointerType>(); | |||
16239 | for (auto *dstProto : dstOPT->quals()) { | |||
16240 | PDecl = dstProto; | |||
16241 | break; | |||
16242 | } | |||
16243 | if (const ObjCInterfaceType *IFaceT = | |||
16244 | SrcType->castAs<ObjCObjectPointerType>()->getInterfaceType()) | |||
16245 | IFace = IFaceT->getDecl(); | |||
16246 | } | |||
16247 | if (getLangOpts().CPlusPlus) { | |||
16248 | DiagKind = diag::err_incompatible_qualified_id; | |||
16249 | isInvalid = true; | |||
16250 | } else { | |||
16251 | DiagKind = diag::warn_incompatible_qualified_id; | |||
16252 | } | |||
16253 | break; | |||
16254 | } | |||
16255 | case IncompatibleVectors: | |||
16256 | if (getLangOpts().CPlusPlus) { | |||
16257 | DiagKind = diag::err_incompatible_vectors; | |||
16258 | isInvalid = true; | |||
16259 | } else { | |||
16260 | DiagKind = diag::warn_incompatible_vectors; | |||
16261 | } | |||
16262 | break; | |||
16263 | case IncompatibleObjCWeakRef: | |||
16264 | DiagKind = diag::err_arc_weak_unavailable_assign; | |||
16265 | isInvalid = true; | |||
16266 | break; | |||
16267 | case Incompatible: | |||
16268 | if (maybeDiagnoseAssignmentToFunction(*this, DstType, SrcExpr)) { | |||
16269 | if (Complained) | |||
16270 | *Complained = true; | |||
16271 | return true; | |||
16272 | } | |||
16273 | ||||
16274 | DiagKind = diag::err_typecheck_convert_incompatible; | |||
16275 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
16276 | MayHaveConvFixit = true; | |||
16277 | isInvalid = true; | |||
16278 | MayHaveFunctionDiff = true; | |||
16279 | break; | |||
16280 | } | |||
16281 | ||||
16282 | QualType FirstType, SecondType; | |||
16283 | switch (Action) { | |||
16284 | case AA_Assigning: | |||
16285 | case AA_Initializing: | |||
16286 | // The destination type comes first. | |||
16287 | FirstType = DstType; | |||
16288 | SecondType = SrcType; | |||
16289 | break; | |||
16290 | ||||
16291 | case AA_Returning: | |||
16292 | case AA_Passing: | |||
16293 | case AA_Passing_CFAudited: | |||
16294 | case AA_Converting: | |||
16295 | case AA_Sending: | |||
16296 | case AA_Casting: | |||
16297 | // The source type comes first. | |||
16298 | FirstType = SrcType; | |||
16299 | SecondType = DstType; | |||
16300 | break; | |||
16301 | } | |||
16302 | ||||
16303 | PartialDiagnostic FDiag = PDiag(DiagKind); | |||
16304 | if (Action == AA_Passing_CFAudited) | |||
16305 | FDiag << FirstType << SecondType << AA_Passing << SrcExpr->getSourceRange(); | |||
16306 | else | |||
16307 | FDiag << FirstType << SecondType << Action << SrcExpr->getSourceRange(); | |||
16308 | ||||
16309 | if (DiagKind == diag::ext_typecheck_convert_incompatible_pointer_sign || | |||
16310 | DiagKind == diag::err_typecheck_convert_incompatible_pointer_sign) { | |||
16311 | auto isPlainChar = [](const clang::Type *Type) { | |||
16312 | return Type->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
16313 | Type->isSpecificBuiltinType(BuiltinType::Char_U); | |||
16314 | }; | |||
16315 | FDiag << (isPlainChar(FirstType->getPointeeOrArrayElementType()) || | |||
16316 | isPlainChar(SecondType->getPointeeOrArrayElementType())); | |||
16317 | } | |||
16318 | ||||
16319 | // If we can fix the conversion, suggest the FixIts. | |||
16320 | if (!ConvHints.isNull()) { | |||
16321 | for (FixItHint &H : ConvHints.Hints) | |||
16322 | FDiag << H; | |||
16323 | } | |||
16324 | ||||
16325 | if (MayHaveConvFixit) { FDiag << (unsigned) (ConvHints.Kind); } | |||
16326 | ||||
16327 | if (MayHaveFunctionDiff) | |||
16328 | HandleFunctionTypeMismatch(FDiag, SecondType, FirstType); | |||
16329 | ||||
16330 | Diag(Loc, FDiag); | |||
16331 | if ((DiagKind == diag::warn_incompatible_qualified_id || | |||
16332 | DiagKind == diag::err_incompatible_qualified_id) && | |||
16333 | PDecl && IFace && !IFace->hasDefinition()) | |||
16334 | Diag(IFace->getLocation(), diag::note_incomplete_class_and_qualified_id) | |||
16335 | << IFace << PDecl; | |||
16336 | ||||
16337 | if (SecondType == Context.OverloadTy) | |||
16338 | NoteAllOverloadCandidates(OverloadExpr::find(SrcExpr).Expression, | |||
16339 | FirstType, /*TakingAddress=*/true); | |||
16340 | ||||
16341 | if (CheckInferredResultType) | |||
16342 | EmitRelatedResultTypeNote(SrcExpr); | |||
16343 | ||||
16344 | if (Action == AA_Returning && ConvTy == IncompatiblePointer) | |||
16345 | EmitRelatedResultTypeNoteForReturn(DstType); | |||
16346 | ||||
16347 | if (Complained) | |||
16348 | *Complained = true; | |||
16349 | return isInvalid; | |||
16350 | } | |||
16351 | ||||
16352 | ExprResult Sema::VerifyIntegerConstantExpression(Expr *E, | |||
16353 | llvm::APSInt *Result, | |||
16354 | AllowFoldKind CanFold) { | |||
16355 | class SimpleICEDiagnoser : public VerifyICEDiagnoser { | |||
16356 | public: | |||
16357 | SemaDiagnosticBuilder diagnoseNotICEType(Sema &S, SourceLocation Loc, | |||
16358 | QualType T) override { | |||
16359 | return S.Diag(Loc, diag::err_ice_not_integral) | |||
16360 | << T << S.LangOpts.CPlusPlus; | |||
16361 | } | |||
16362 | SemaDiagnosticBuilder diagnoseNotICE(Sema &S, SourceLocation Loc) override { | |||
16363 | return S.Diag(Loc, diag::err_expr_not_ice) << S.LangOpts.CPlusPlus; | |||
16364 | } | |||
16365 | } Diagnoser; | |||
16366 | ||||
16367 | return VerifyIntegerConstantExpression(E, Result, Diagnoser, CanFold); | |||
16368 | } | |||
16369 | ||||
16370 | ExprResult Sema::VerifyIntegerConstantExpression(Expr *E, | |||
16371 | llvm::APSInt *Result, | |||
16372 | unsigned DiagID, | |||
16373 | AllowFoldKind CanFold) { | |||
16374 | class IDDiagnoser : public VerifyICEDiagnoser { | |||
16375 | unsigned DiagID; | |||
16376 | ||||
16377 | public: | |||
16378 | IDDiagnoser(unsigned DiagID) | |||
16379 | : VerifyICEDiagnoser(DiagID == 0), DiagID(DiagID) { } | |||
16380 | ||||
16381 | SemaDiagnosticBuilder diagnoseNotICE(Sema &S, SourceLocation Loc) override { | |||
16382 | return S.Diag(Loc, DiagID); | |||
16383 | } | |||
16384 | } Diagnoser(DiagID); | |||
16385 | ||||
16386 | return VerifyIntegerConstantExpression(E, Result, Diagnoser, CanFold); | |||
16387 | } | |||
16388 | ||||
16389 | Sema::SemaDiagnosticBuilder | |||
16390 | Sema::VerifyICEDiagnoser::diagnoseNotICEType(Sema &S, SourceLocation Loc, | |||
16391 | QualType T) { | |||
16392 | return diagnoseNotICE(S, Loc); | |||
16393 | } | |||
16394 | ||||
16395 | Sema::SemaDiagnosticBuilder | |||
16396 | Sema::VerifyICEDiagnoser::diagnoseFold(Sema &S, SourceLocation Loc) { | |||
16397 | return S.Diag(Loc, diag::ext_expr_not_ice) << S.LangOpts.CPlusPlus; | |||
16398 | } | |||
16399 | ||||
16400 | ExprResult | |||
16401 | Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, | |||
16402 | VerifyICEDiagnoser &Diagnoser, | |||
16403 | AllowFoldKind CanFold) { | |||
16404 | SourceLocation DiagLoc = E->getBeginLoc(); | |||
16405 | ||||
16406 | if (getLangOpts().CPlusPlus11) { | |||
16407 | // C++11 [expr.const]p5: | |||
16408 | // If an expression of literal class type is used in a context where an | |||
16409 | // integral constant expression is required, then that class type shall | |||
16410 | // have a single non-explicit conversion function to an integral or | |||
16411 | // unscoped enumeration type | |||
16412 | ExprResult Converted; | |||
16413 | class CXX11ConvertDiagnoser : public ICEConvertDiagnoser { | |||
16414 | VerifyICEDiagnoser &BaseDiagnoser; | |||
16415 | public: | |||
16416 | CXX11ConvertDiagnoser(VerifyICEDiagnoser &BaseDiagnoser) | |||
16417 | : ICEConvertDiagnoser(/*AllowScopedEnumerations*/ false, | |||
16418 | BaseDiagnoser.Suppress, true), | |||
16419 | BaseDiagnoser(BaseDiagnoser) {} | |||
16420 | ||||
16421 | SemaDiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc, | |||
16422 | QualType T) override { | |||
16423 | return BaseDiagnoser.diagnoseNotICEType(S, Loc, T); | |||
16424 | } | |||
16425 | ||||
16426 | SemaDiagnosticBuilder diagnoseIncomplete( | |||
16427 | Sema &S, SourceLocation Loc, QualType T) override { | |||
16428 | return S.Diag(Loc, diag::err_ice_incomplete_type) << T; | |||
16429 | } | |||
16430 | ||||
16431 | SemaDiagnosticBuilder diagnoseExplicitConv( | |||
16432 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) override { | |||
16433 | return S.Diag(Loc, diag::err_ice_explicit_conversion) << T << ConvTy; | |||
16434 | } | |||
16435 | ||||
16436 | SemaDiagnosticBuilder noteExplicitConv( | |||
16437 | Sema &S, CXXConversionDecl *Conv, QualType ConvTy) override { | |||
16438 | return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here) | |||
16439 | << ConvTy->isEnumeralType() << ConvTy; | |||
16440 | } | |||
16441 | ||||
16442 | SemaDiagnosticBuilder diagnoseAmbiguous( | |||
16443 | Sema &S, SourceLocation Loc, QualType T) override { | |||
16444 | return S.Diag(Loc, diag::err_ice_ambiguous_conversion) << T; | |||
16445 | } | |||
16446 | ||||
16447 | SemaDiagnosticBuilder noteAmbiguous( | |||
16448 | Sema &S, CXXConversionDecl *Conv, QualType ConvTy) override { | |||
16449 | return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here) | |||
16450 | << ConvTy->isEnumeralType() << ConvTy; | |||
16451 | } | |||
16452 | ||||
16453 | SemaDiagnosticBuilder diagnoseConversion( | |||
16454 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) override { | |||
16455 | llvm_unreachable("conversion functions are permitted")::llvm::llvm_unreachable_internal("conversion functions are permitted" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16455); | |||
16456 | } | |||
16457 | } ConvertDiagnoser(Diagnoser); | |||
16458 | ||||
16459 | Converted = PerformContextualImplicitConversion(DiagLoc, E, | |||
16460 | ConvertDiagnoser); | |||
16461 | if (Converted.isInvalid()) | |||
16462 | return Converted; | |||
16463 | E = Converted.get(); | |||
16464 | if (!E->getType()->isIntegralOrUnscopedEnumerationType()) | |||
16465 | return ExprError(); | |||
16466 | } else if (!E->getType()->isIntegralOrUnscopedEnumerationType()) { | |||
16467 | // An ICE must be of integral or unscoped enumeration type. | |||
16468 | if (!Diagnoser.Suppress) | |||
16469 | Diagnoser.diagnoseNotICEType(*this, DiagLoc, E->getType()) | |||
16470 | << E->getSourceRange(); | |||
16471 | return ExprError(); | |||
16472 | } | |||
16473 | ||||
16474 | ExprResult RValueExpr = DefaultLvalueConversion(E); | |||
16475 | if (RValueExpr.isInvalid()) | |||
16476 | return ExprError(); | |||
16477 | ||||
16478 | E = RValueExpr.get(); | |||
16479 | ||||
16480 | // Circumvent ICE checking in C++11 to avoid evaluating the expression twice | |||
16481 | // in the non-ICE case. | |||
16482 | if (!getLangOpts().CPlusPlus11 && E->isIntegerConstantExpr(Context)) { | |||
16483 | if (Result) | |||
16484 | *Result = E->EvaluateKnownConstIntCheckOverflow(Context); | |||
16485 | if (!isa<ConstantExpr>(E)) | |||
16486 | E = Result ? ConstantExpr::Create(Context, E, APValue(*Result)) | |||
16487 | : ConstantExpr::Create(Context, E); | |||
16488 | return E; | |||
16489 | } | |||
16490 | ||||
16491 | Expr::EvalResult EvalResult; | |||
16492 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
16493 | EvalResult.Diag = &Notes; | |||
16494 | ||||
16495 | // Try to evaluate the expression, and produce diagnostics explaining why it's | |||
16496 | // not a constant expression as a side-effect. | |||
16497 | bool Folded = | |||
16498 | E->EvaluateAsRValue(EvalResult, Context, /*isConstantContext*/ true) && | |||
16499 | EvalResult.Val.isInt() && !EvalResult.HasSideEffects; | |||
16500 | ||||
16501 | if (!isa<ConstantExpr>(E)) | |||
16502 | E = ConstantExpr::Create(Context, E, EvalResult.Val); | |||
16503 | ||||
16504 | // In C++11, we can rely on diagnostics being produced for any expression | |||
16505 | // which is not a constant expression. If no diagnostics were produced, then | |||
16506 | // this is a constant expression. | |||
16507 | if (Folded && getLangOpts().CPlusPlus11 && Notes.empty()) { | |||
16508 | if (Result) | |||
16509 | *Result = EvalResult.Val.getInt(); | |||
16510 | return E; | |||
16511 | } | |||
16512 | ||||
16513 | // If our only note is the usual "invalid subexpression" note, just point | |||
16514 | // the caret at its location rather than producing an essentially | |||
16515 | // redundant note. | |||
16516 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | |||
16517 | diag::note_invalid_subexpr_in_const_expr) { | |||
16518 | DiagLoc = Notes[0].first; | |||
16519 | Notes.clear(); | |||
16520 | } | |||
16521 | ||||
16522 | if (!Folded || !CanFold) { | |||
16523 | if (!Diagnoser.Suppress) { | |||
16524 | Diagnoser.diagnoseNotICE(*this, DiagLoc) << E->getSourceRange(); | |||
16525 | for (const PartialDiagnosticAt &Note : Notes) | |||
16526 | Diag(Note.first, Note.second); | |||
16527 | } | |||
16528 | ||||
16529 | return ExprError(); | |||
16530 | } | |||
16531 | ||||
16532 | Diagnoser.diagnoseFold(*this, DiagLoc) << E->getSourceRange(); | |||
16533 | for (const PartialDiagnosticAt &Note : Notes) | |||
16534 | Diag(Note.first, Note.second); | |||
16535 | ||||
16536 | if (Result) | |||
16537 | *Result = EvalResult.Val.getInt(); | |||
16538 | return E; | |||
16539 | } | |||
16540 | ||||
16541 | namespace { | |||
16542 | // Handle the case where we conclude a expression which we speculatively | |||
16543 | // considered to be unevaluated is actually evaluated. | |||
16544 | class TransformToPE : public TreeTransform<TransformToPE> { | |||
16545 | typedef TreeTransform<TransformToPE> BaseTransform; | |||
16546 | ||||
16547 | public: | |||
16548 | TransformToPE(Sema &SemaRef) : BaseTransform(SemaRef) { } | |||
16549 | ||||
16550 | // Make sure we redo semantic analysis | |||
16551 | bool AlwaysRebuild() { return true; } | |||
16552 | bool ReplacingOriginal() { return true; } | |||
16553 | ||||
16554 | // We need to special-case DeclRefExprs referring to FieldDecls which | |||
16555 | // are not part of a member pointer formation; normal TreeTransforming | |||
16556 | // doesn't catch this case because of the way we represent them in the AST. | |||
16557 | // FIXME: This is a bit ugly; is it really the best way to handle this | |||
16558 | // case? | |||
16559 | // | |||
16560 | // Error on DeclRefExprs referring to FieldDecls. | |||
16561 | ExprResult TransformDeclRefExpr(DeclRefExpr *E) { | |||
16562 | if (isa<FieldDecl>(E->getDecl()) && | |||
16563 | !SemaRef.isUnevaluatedContext()) | |||
16564 | return SemaRef.Diag(E->getLocation(), | |||
16565 | diag::err_invalid_non_static_member_use) | |||
16566 | << E->getDecl() << E->getSourceRange(); | |||
16567 | ||||
16568 | return BaseTransform::TransformDeclRefExpr(E); | |||
16569 | } | |||
16570 | ||||
16571 | // Exception: filter out member pointer formation | |||
16572 | ExprResult TransformUnaryOperator(UnaryOperator *E) { | |||
16573 | if (E->getOpcode() == UO_AddrOf && E->getType()->isMemberPointerType()) | |||
16574 | return E; | |||
16575 | ||||
16576 | return BaseTransform::TransformUnaryOperator(E); | |||
16577 | } | |||
16578 | ||||
16579 | // The body of a lambda-expression is in a separate expression evaluation | |||
16580 | // context so never needs to be transformed. | |||
16581 | // FIXME: Ideally we wouldn't transform the closure type either, and would | |||
16582 | // just recreate the capture expressions and lambda expression. | |||
16583 | StmtResult TransformLambdaBody(LambdaExpr *E, Stmt *Body) { | |||
16584 | return SkipLambdaBody(E, Body); | |||
16585 | } | |||
16586 | }; | |||
16587 | } | |||
16588 | ||||
16589 | ExprResult Sema::TransformToPotentiallyEvaluated(Expr *E) { | |||
16590 | assert(isUnevaluatedContext() &&(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16591, __extension__ __PRETTY_FUNCTION__)) | |||
16591 | "Should only transform unevaluated expressions")(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16591, __extension__ __PRETTY_FUNCTION__)); | |||
16592 | ExprEvalContexts.back().Context = | |||
16593 | ExprEvalContexts[ExprEvalContexts.size()-2].Context; | |||
16594 | if (isUnevaluatedContext()) | |||
16595 | return E; | |||
16596 | return TransformToPE(*this).TransformExpr(E); | |||
16597 | } | |||
16598 | ||||
16599 | void | |||
16600 | Sema::PushExpressionEvaluationContext( | |||
16601 | ExpressionEvaluationContext NewContext, Decl *LambdaContextDecl, | |||
16602 | ExpressionEvaluationContextRecord::ExpressionKind ExprContext) { | |||
16603 | ExprEvalContexts.emplace_back(NewContext, ExprCleanupObjects.size(), Cleanup, | |||
16604 | LambdaContextDecl, ExprContext); | |||
16605 | Cleanup.reset(); | |||
16606 | if (!MaybeODRUseExprs.empty()) | |||
16607 | std::swap(MaybeODRUseExprs, ExprEvalContexts.back().SavedMaybeODRUseExprs); | |||
16608 | } | |||
16609 | ||||
16610 | void | |||
16611 | Sema::PushExpressionEvaluationContext( | |||
16612 | ExpressionEvaluationContext NewContext, ReuseLambdaContextDecl_t, | |||
16613 | ExpressionEvaluationContextRecord::ExpressionKind ExprContext) { | |||
16614 | Decl *ClosureContextDecl = ExprEvalContexts.back().ManglingContextDecl; | |||
16615 | PushExpressionEvaluationContext(NewContext, ClosureContextDecl, ExprContext); | |||
16616 | } | |||
16617 | ||||
16618 | namespace { | |||
16619 | ||||
16620 | const DeclRefExpr *CheckPossibleDeref(Sema &S, const Expr *PossibleDeref) { | |||
16621 | PossibleDeref = PossibleDeref->IgnoreParenImpCasts(); | |||
16622 | if (const auto *E = dyn_cast<UnaryOperator>(PossibleDeref)) { | |||
16623 | if (E->getOpcode() == UO_Deref) | |||
16624 | return CheckPossibleDeref(S, E->getSubExpr()); | |||
16625 | } else if (const auto *E = dyn_cast<ArraySubscriptExpr>(PossibleDeref)) { | |||
16626 | return CheckPossibleDeref(S, E->getBase()); | |||
16627 | } else if (const auto *E = dyn_cast<MemberExpr>(PossibleDeref)) { | |||
16628 | return CheckPossibleDeref(S, E->getBase()); | |||
16629 | } else if (const auto E = dyn_cast<DeclRefExpr>(PossibleDeref)) { | |||
16630 | QualType Inner; | |||
16631 | QualType Ty = E->getType(); | |||
16632 | if (const auto *Ptr = Ty->getAs<PointerType>()) | |||
16633 | Inner = Ptr->getPointeeType(); | |||
16634 | else if (const auto *Arr = S.Context.getAsArrayType(Ty)) | |||
16635 | Inner = Arr->getElementType(); | |||
16636 | else | |||
16637 | return nullptr; | |||
16638 | ||||
16639 | if (Inner->hasAttr(attr::NoDeref)) | |||
16640 | return E; | |||
16641 | } | |||
16642 | return nullptr; | |||
16643 | } | |||
16644 | ||||
16645 | } // namespace | |||
16646 | ||||
16647 | void Sema::WarnOnPendingNoDerefs(ExpressionEvaluationContextRecord &Rec) { | |||
16648 | for (const Expr *E : Rec.PossibleDerefs) { | |||
16649 | const DeclRefExpr *DeclRef = CheckPossibleDeref(*this, E); | |||
16650 | if (DeclRef) { | |||
16651 | const ValueDecl *Decl = DeclRef->getDecl(); | |||
16652 | Diag(E->getExprLoc(), diag::warn_dereference_of_noderef_type) | |||
16653 | << Decl->getName() << E->getSourceRange(); | |||
16654 | Diag(Decl->getLocation(), diag::note_previous_decl) << Decl->getName(); | |||
16655 | } else { | |||
16656 | Diag(E->getExprLoc(), diag::warn_dereference_of_noderef_type_no_decl) | |||
16657 | << E->getSourceRange(); | |||
16658 | } | |||
16659 | } | |||
16660 | Rec.PossibleDerefs.clear(); | |||
16661 | } | |||
16662 | ||||
16663 | /// Check whether E, which is either a discarded-value expression or an | |||
16664 | /// unevaluated operand, is a simple-assignment to a volatlie-qualified lvalue, | |||
16665 | /// and if so, remove it from the list of volatile-qualified assignments that | |||
16666 | /// we are going to warn are deprecated. | |||
16667 | void Sema::CheckUnusedVolatileAssignment(Expr *E) { | |||
16668 | if (!E->getType().isVolatileQualified() || !getLangOpts().CPlusPlus20) | |||
16669 | return; | |||
16670 | ||||
16671 | // Note: ignoring parens here is not justified by the standard rules, but | |||
16672 | // ignoring parentheses seems like a more reasonable approach, and this only | |||
16673 | // drives a deprecation warning so doesn't affect conformance. | |||
16674 | if (auto *BO = dyn_cast<BinaryOperator>(E->IgnoreParenImpCasts())) { | |||
16675 | if (BO->getOpcode() == BO_Assign) { | |||
16676 | auto &LHSs = ExprEvalContexts.back().VolatileAssignmentLHSs; | |||
16677 | LHSs.erase(std::remove(LHSs.begin(), LHSs.end(), BO->getLHS()), | |||
16678 | LHSs.end()); | |||
16679 | } | |||
16680 | } | |||
16681 | } | |||
16682 | ||||
16683 | ExprResult Sema::CheckForImmediateInvocation(ExprResult E, FunctionDecl *Decl) { | |||
16684 | if (isUnevaluatedContext() || !E.isUsable() || !Decl || | |||
16685 | !Decl->isConsteval() || isConstantEvaluated() || | |||
16686 | RebuildingImmediateInvocation) | |||
16687 | return E; | |||
16688 | ||||
16689 | /// Opportunistically remove the callee from ReferencesToConsteval if we can. | |||
16690 | /// It's OK if this fails; we'll also remove this in | |||
16691 | /// HandleImmediateInvocations, but catching it here allows us to avoid | |||
16692 | /// walking the AST looking for it in simple cases. | |||
16693 | if (auto *Call = dyn_cast<CallExpr>(E.get()->IgnoreImplicit())) | |||
16694 | if (auto *DeclRef = | |||
16695 | dyn_cast<DeclRefExpr>(Call->getCallee()->IgnoreImplicit())) | |||
16696 | ExprEvalContexts.back().ReferenceToConsteval.erase(DeclRef); | |||
16697 | ||||
16698 | E = MaybeCreateExprWithCleanups(E); | |||
16699 | ||||
16700 | ConstantExpr *Res = ConstantExpr::Create( | |||
16701 | getASTContext(), E.get(), | |||
16702 | ConstantExpr::getStorageKind(Decl->getReturnType().getTypePtr(), | |||
16703 | getASTContext()), | |||
16704 | /*IsImmediateInvocation*/ true); | |||
16705 | ExprEvalContexts.back().ImmediateInvocationCandidates.emplace_back(Res, 0); | |||
16706 | return Res; | |||
16707 | } | |||
16708 | ||||
16709 | static void EvaluateAndDiagnoseImmediateInvocation( | |||
16710 | Sema &SemaRef, Sema::ImmediateInvocationCandidate Candidate) { | |||
16711 | llvm::SmallVector<PartialDiagnosticAt, 8> Notes; | |||
16712 | Expr::EvalResult Eval; | |||
16713 | Eval.Diag = &Notes; | |||
16714 | ConstantExpr *CE = Candidate.getPointer(); | |||
16715 | bool Result = CE->EvaluateAsConstantExpr( | |||
16716 | Eval, SemaRef.getASTContext(), ConstantExprKind::ImmediateInvocation); | |||
16717 | if (!Result || !Notes.empty()) { | |||
16718 | Expr *InnerExpr = CE->getSubExpr()->IgnoreImplicit(); | |||
16719 | if (auto *FunctionalCast = dyn_cast<CXXFunctionalCastExpr>(InnerExpr)) | |||
16720 | InnerExpr = FunctionalCast->getSubExpr(); | |||
16721 | FunctionDecl *FD = nullptr; | |||
16722 | if (auto *Call = dyn_cast<CallExpr>(InnerExpr)) | |||
16723 | FD = cast<FunctionDecl>(Call->getCalleeDecl()); | |||
16724 | else if (auto *Call = dyn_cast<CXXConstructExpr>(InnerExpr)) | |||
16725 | FD = Call->getConstructor(); | |||
16726 | else | |||
16727 | llvm_unreachable("unhandled decl kind")::llvm::llvm_unreachable_internal("unhandled decl kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16727); | |||
16728 | assert(FD->isConsteval())(static_cast <bool> (FD->isConsteval()) ? void (0) : __assert_fail ("FD->isConsteval()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16728, __extension__ __PRETTY_FUNCTION__)); | |||
16729 | SemaRef.Diag(CE->getBeginLoc(), diag::err_invalid_consteval_call) << FD; | |||
16730 | for (auto &Note : Notes) | |||
16731 | SemaRef.Diag(Note.first, Note.second); | |||
16732 | return; | |||
16733 | } | |||
16734 | CE->MoveIntoResult(Eval.Val, SemaRef.getASTContext()); | |||
16735 | } | |||
16736 | ||||
16737 | static void RemoveNestedImmediateInvocation( | |||
16738 | Sema &SemaRef, Sema::ExpressionEvaluationContextRecord &Rec, | |||
16739 | SmallVector<Sema::ImmediateInvocationCandidate, 4>::reverse_iterator It) { | |||
16740 | struct ComplexRemove : TreeTransform<ComplexRemove> { | |||
16741 | using Base = TreeTransform<ComplexRemove>; | |||
16742 | llvm::SmallPtrSetImpl<DeclRefExpr *> &DRSet; | |||
16743 | SmallVector<Sema::ImmediateInvocationCandidate, 4> &IISet; | |||
16744 | SmallVector<Sema::ImmediateInvocationCandidate, 4>::reverse_iterator | |||
16745 | CurrentII; | |||
16746 | ComplexRemove(Sema &SemaRef, llvm::SmallPtrSetImpl<DeclRefExpr *> &DR, | |||
16747 | SmallVector<Sema::ImmediateInvocationCandidate, 4> &II, | |||
16748 | SmallVector<Sema::ImmediateInvocationCandidate, | |||
16749 | 4>::reverse_iterator Current) | |||
16750 | : Base(SemaRef), DRSet(DR), IISet(II), CurrentII(Current) {} | |||
16751 | void RemoveImmediateInvocation(ConstantExpr* E) { | |||
16752 | auto It = std::find_if(CurrentII, IISet.rend(), | |||
16753 | [E](Sema::ImmediateInvocationCandidate Elem) { | |||
16754 | return Elem.getPointer() == E; | |||
16755 | }); | |||
16756 | assert(It != IISet.rend() &&(static_cast <bool> (It != IISet.rend() && "ConstantExpr marked IsImmediateInvocation should " "be present") ? void (0) : __assert_fail ("It != IISet.rend() && \"ConstantExpr marked IsImmediateInvocation should \" \"be present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16758, __extension__ __PRETTY_FUNCTION__)) | |||
16757 | "ConstantExpr marked IsImmediateInvocation should "(static_cast <bool> (It != IISet.rend() && "ConstantExpr marked IsImmediateInvocation should " "be present") ? void (0) : __assert_fail ("It != IISet.rend() && \"ConstantExpr marked IsImmediateInvocation should \" \"be present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16758, __extension__ __PRETTY_FUNCTION__)) | |||
16758 | "be present")(static_cast <bool> (It != IISet.rend() && "ConstantExpr marked IsImmediateInvocation should " "be present") ? void (0) : __assert_fail ("It != IISet.rend() && \"ConstantExpr marked IsImmediateInvocation should \" \"be present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16758, __extension__ __PRETTY_FUNCTION__)); | |||
16759 | It->setInt(1); // Mark as deleted | |||
16760 | } | |||
16761 | ExprResult TransformConstantExpr(ConstantExpr *E) { | |||
16762 | if (!E->isImmediateInvocation()) | |||
16763 | return Base::TransformConstantExpr(E); | |||
16764 | RemoveImmediateInvocation(E); | |||
16765 | return Base::TransformExpr(E->getSubExpr()); | |||
16766 | } | |||
16767 | /// Base::TransfromCXXOperatorCallExpr doesn't traverse the callee so | |||
16768 | /// we need to remove its DeclRefExpr from the DRSet. | |||
16769 | ExprResult TransformCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | |||
16770 | DRSet.erase(cast<DeclRefExpr>(E->getCallee()->IgnoreImplicit())); | |||
16771 | return Base::TransformCXXOperatorCallExpr(E); | |||
16772 | } | |||
16773 | /// Base::TransformInitializer skip ConstantExpr so we need to visit them | |||
16774 | /// here. | |||
16775 | ExprResult TransformInitializer(Expr *Init, bool NotCopyInit) { | |||
16776 | if (!Init) | |||
16777 | return Init; | |||
16778 | /// ConstantExpr are the first layer of implicit node to be removed so if | |||
16779 | /// Init isn't a ConstantExpr, no ConstantExpr will be skipped. | |||
16780 | if (auto *CE = dyn_cast<ConstantExpr>(Init)) | |||
16781 | if (CE->isImmediateInvocation()) | |||
16782 | RemoveImmediateInvocation(CE); | |||
16783 | return Base::TransformInitializer(Init, NotCopyInit); | |||
16784 | } | |||
16785 | ExprResult TransformDeclRefExpr(DeclRefExpr *E) { | |||
16786 | DRSet.erase(E); | |||
16787 | return E; | |||
16788 | } | |||
16789 | bool AlwaysRebuild() { return false; } | |||
16790 | bool ReplacingOriginal() { return true; } | |||
16791 | bool AllowSkippingCXXConstructExpr() { | |||
16792 | bool Res = AllowSkippingFirstCXXConstructExpr; | |||
16793 | AllowSkippingFirstCXXConstructExpr = true; | |||
16794 | return Res; | |||
16795 | } | |||
16796 | bool AllowSkippingFirstCXXConstructExpr = true; | |||
16797 | } Transformer(SemaRef, Rec.ReferenceToConsteval, | |||
16798 | Rec.ImmediateInvocationCandidates, It); | |||
16799 | ||||
16800 | /// CXXConstructExpr with a single argument are getting skipped by | |||
16801 | /// TreeTransform in some situtation because they could be implicit. This | |||
16802 | /// can only occur for the top-level CXXConstructExpr because it is used | |||
16803 | /// nowhere in the expression being transformed therefore will not be rebuilt. | |||
16804 | /// Setting AllowSkippingFirstCXXConstructExpr to false will prevent from | |||
16805 | /// skipping the first CXXConstructExpr. | |||
16806 | if (isa<CXXConstructExpr>(It->getPointer()->IgnoreImplicit())) | |||
16807 | Transformer.AllowSkippingFirstCXXConstructExpr = false; | |||
16808 | ||||
16809 | ExprResult Res = Transformer.TransformExpr(It->getPointer()->getSubExpr()); | |||
16810 | assert(Res.isUsable())(static_cast <bool> (Res.isUsable()) ? void (0) : __assert_fail ("Res.isUsable()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16810, __extension__ __PRETTY_FUNCTION__)); | |||
16811 | Res = SemaRef.MaybeCreateExprWithCleanups(Res); | |||
16812 | It->getPointer()->setSubExpr(Res.get()); | |||
16813 | } | |||
16814 | ||||
16815 | static void | |||
16816 | HandleImmediateInvocations(Sema &SemaRef, | |||
16817 | Sema::ExpressionEvaluationContextRecord &Rec) { | |||
16818 | if ((Rec.ImmediateInvocationCandidates.size() == 0 && | |||
16819 | Rec.ReferenceToConsteval.size() == 0) || | |||
16820 | SemaRef.RebuildingImmediateInvocation) | |||
16821 | return; | |||
16822 | ||||
16823 | /// When we have more then 1 ImmediateInvocationCandidates we need to check | |||
16824 | /// for nested ImmediateInvocationCandidates. when we have only 1 we only | |||
16825 | /// need to remove ReferenceToConsteval in the immediate invocation. | |||
16826 | if (Rec.ImmediateInvocationCandidates.size() > 1) { | |||
16827 | ||||
16828 | /// Prevent sema calls during the tree transform from adding pointers that | |||
16829 | /// are already in the sets. | |||
16830 | llvm::SaveAndRestore<bool> DisableIITracking( | |||
16831 | SemaRef.RebuildingImmediateInvocation, true); | |||
16832 | ||||
16833 | /// Prevent diagnostic during tree transfrom as they are duplicates | |||
16834 | Sema::TentativeAnalysisScope DisableDiag(SemaRef); | |||
16835 | ||||
16836 | for (auto It = Rec.ImmediateInvocationCandidates.rbegin(); | |||
16837 | It != Rec.ImmediateInvocationCandidates.rend(); It++) | |||
16838 | if (!It->getInt()) | |||
16839 | RemoveNestedImmediateInvocation(SemaRef, Rec, It); | |||
16840 | } else if (Rec.ImmediateInvocationCandidates.size() == 1 && | |||
16841 | Rec.ReferenceToConsteval.size()) { | |||
16842 | struct SimpleRemove : RecursiveASTVisitor<SimpleRemove> { | |||
16843 | llvm::SmallPtrSetImpl<DeclRefExpr *> &DRSet; | |||
16844 | SimpleRemove(llvm::SmallPtrSetImpl<DeclRefExpr *> &S) : DRSet(S) {} | |||
16845 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
16846 | DRSet.erase(E); | |||
16847 | return DRSet.size(); | |||
16848 | } | |||
16849 | } Visitor(Rec.ReferenceToConsteval); | |||
16850 | Visitor.TraverseStmt( | |||
16851 | Rec.ImmediateInvocationCandidates.front().getPointer()->getSubExpr()); | |||
16852 | } | |||
16853 | for (auto CE : Rec.ImmediateInvocationCandidates) | |||
16854 | if (!CE.getInt()) | |||
16855 | EvaluateAndDiagnoseImmediateInvocation(SemaRef, CE); | |||
16856 | for (auto DR : Rec.ReferenceToConsteval) { | |||
16857 | auto *FD = cast<FunctionDecl>(DR->getDecl()); | |||
16858 | SemaRef.Diag(DR->getBeginLoc(), diag::err_invalid_consteval_take_address) | |||
16859 | << FD; | |||
16860 | SemaRef.Diag(FD->getLocation(), diag::note_declared_at); | |||
16861 | } | |||
16862 | } | |||
16863 | ||||
16864 | void Sema::PopExpressionEvaluationContext() { | |||
16865 | ExpressionEvaluationContextRecord& Rec = ExprEvalContexts.back(); | |||
16866 | unsigned NumTypos = Rec.NumTypos; | |||
16867 | ||||
16868 | if (!Rec.Lambdas.empty()) { | |||
16869 | using ExpressionKind = ExpressionEvaluationContextRecord::ExpressionKind; | |||
16870 | if (!getLangOpts().CPlusPlus20 && | |||
16871 | (Rec.ExprContext == ExpressionKind::EK_TemplateArgument || | |||
16872 | Rec.isUnevaluated() || | |||
16873 | (Rec.isConstantEvaluated() && !getLangOpts().CPlusPlus17))) { | |||
16874 | unsigned D; | |||
16875 | if (Rec.isUnevaluated()) { | |||
16876 | // C++11 [expr.prim.lambda]p2: | |||
16877 | // A lambda-expression shall not appear in an unevaluated operand | |||
16878 | // (Clause 5). | |||
16879 | D = diag::err_lambda_unevaluated_operand; | |||
16880 | } else if (Rec.isConstantEvaluated() && !getLangOpts().CPlusPlus17) { | |||
16881 | // C++1y [expr.const]p2: | |||
16882 | // A conditional-expression e is a core constant expression unless the | |||
16883 | // evaluation of e, following the rules of the abstract machine, would | |||
16884 | // evaluate [...] a lambda-expression. | |||
16885 | D = diag::err_lambda_in_constant_expression; | |||
16886 | } else if (Rec.ExprContext == ExpressionKind::EK_TemplateArgument) { | |||
16887 | // C++17 [expr.prim.lamda]p2: | |||
16888 | // A lambda-expression shall not appear [...] in a template-argument. | |||
16889 | D = diag::err_lambda_in_invalid_context; | |||
16890 | } else | |||
16891 | llvm_unreachable("Couldn't infer lambda error message.")::llvm::llvm_unreachable_internal("Couldn't infer lambda error message." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16891); | |||
16892 | ||||
16893 | for (const auto *L : Rec.Lambdas) | |||
16894 | Diag(L->getBeginLoc(), D); | |||
16895 | } | |||
16896 | } | |||
16897 | ||||
16898 | WarnOnPendingNoDerefs(Rec); | |||
16899 | HandleImmediateInvocations(*this, Rec); | |||
16900 | ||||
16901 | // Warn on any volatile-qualified simple-assignments that are not discarded- | |||
16902 | // value expressions nor unevaluated operands (those cases get removed from | |||
16903 | // this list by CheckUnusedVolatileAssignment). | |||
16904 | for (auto *BO : Rec.VolatileAssignmentLHSs) | |||
16905 | Diag(BO->getBeginLoc(), diag::warn_deprecated_simple_assign_volatile) | |||
16906 | << BO->getType(); | |||
16907 | ||||
16908 | // When are coming out of an unevaluated context, clear out any | |||
16909 | // temporaries that we may have created as part of the evaluation of | |||
16910 | // the expression in that context: they aren't relevant because they | |||
16911 | // will never be constructed. | |||
16912 | if (Rec.isUnevaluated() || Rec.isConstantEvaluated()) { | |||
16913 | ExprCleanupObjects.erase(ExprCleanupObjects.begin() + Rec.NumCleanupObjects, | |||
16914 | ExprCleanupObjects.end()); | |||
16915 | Cleanup = Rec.ParentCleanup; | |||
16916 | CleanupVarDeclMarking(); | |||
16917 | std::swap(MaybeODRUseExprs, Rec.SavedMaybeODRUseExprs); | |||
16918 | // Otherwise, merge the contexts together. | |||
16919 | } else { | |||
16920 | Cleanup.mergeFrom(Rec.ParentCleanup); | |||
16921 | MaybeODRUseExprs.insert(Rec.SavedMaybeODRUseExprs.begin(), | |||
16922 | Rec.SavedMaybeODRUseExprs.end()); | |||
16923 | } | |||
16924 | ||||
16925 | // Pop the current expression evaluation context off the stack. | |||
16926 | ExprEvalContexts.pop_back(); | |||
16927 | ||||
16928 | // The global expression evaluation context record is never popped. | |||
16929 | ExprEvalContexts.back().NumTypos += NumTypos; | |||
16930 | } | |||
16931 | ||||
16932 | void Sema::DiscardCleanupsInEvaluationContext() { | |||
16933 | ExprCleanupObjects.erase( | |||
16934 | ExprCleanupObjects.begin() + ExprEvalContexts.back().NumCleanupObjects, | |||
16935 | ExprCleanupObjects.end()); | |||
16936 | Cleanup.reset(); | |||
16937 | MaybeODRUseExprs.clear(); | |||
16938 | } | |||
16939 | ||||
16940 | ExprResult Sema::HandleExprEvaluationContextForTypeof(Expr *E) { | |||
16941 | ExprResult Result = CheckPlaceholderExpr(E); | |||
16942 | if (Result.isInvalid()) | |||
16943 | return ExprError(); | |||
16944 | E = Result.get(); | |||
16945 | if (!E->getType()->isVariablyModifiedType()) | |||
16946 | return E; | |||
16947 | return TransformToPotentiallyEvaluated(E); | |||
16948 | } | |||
16949 | ||||
16950 | /// Are we in a context that is potentially constant evaluated per C++20 | |||
16951 | /// [expr.const]p12? | |||
16952 | static bool isPotentiallyConstantEvaluatedContext(Sema &SemaRef) { | |||
16953 | /// C++2a [expr.const]p12: | |||
16954 | // An expression or conversion is potentially constant evaluated if it is | |||
16955 | switch (SemaRef.ExprEvalContexts.back().Context) { | |||
16956 | case Sema::ExpressionEvaluationContext::ConstantEvaluated: | |||
16957 | // -- a manifestly constant-evaluated expression, | |||
16958 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluated: | |||
16959 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
16960 | case Sema::ExpressionEvaluationContext::DiscardedStatement: | |||
16961 | // -- a potentially-evaluated expression, | |||
16962 | case Sema::ExpressionEvaluationContext::UnevaluatedList: | |||
16963 | // -- an immediate subexpression of a braced-init-list, | |||
16964 | ||||
16965 | // -- [FIXME] an expression of the form & cast-expression that occurs | |||
16966 | // within a templated entity | |||
16967 | // -- a subexpression of one of the above that is not a subexpression of | |||
16968 | // a nested unevaluated operand. | |||
16969 | return true; | |||
16970 | ||||
16971 | case Sema::ExpressionEvaluationContext::Unevaluated: | |||
16972 | case Sema::ExpressionEvaluationContext::UnevaluatedAbstract: | |||
16973 | // Expressions in this context are never evaluated. | |||
16974 | return false; | |||
16975 | } | |||
16976 | llvm_unreachable("Invalid context")::llvm::llvm_unreachable_internal("Invalid context", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 16976); | |||
16977 | } | |||
16978 | ||||
16979 | /// Return true if this function has a calling convention that requires mangling | |||
16980 | /// in the size of the parameter pack. | |||
16981 | static bool funcHasParameterSizeMangling(Sema &S, FunctionDecl *FD) { | |||
16982 | // These manglings don't do anything on non-Windows or non-x86 platforms, so | |||
16983 | // we don't need parameter type sizes. | |||
16984 | const llvm::Triple &TT = S.Context.getTargetInfo().getTriple(); | |||
16985 | if (!TT.isOSWindows() || !TT.isX86()) | |||
16986 | return false; | |||
16987 | ||||
16988 | // If this is C++ and this isn't an extern "C" function, parameters do not | |||
16989 | // need to be complete. In this case, C++ mangling will apply, which doesn't | |||
16990 | // use the size of the parameters. | |||
16991 | if (S.getLangOpts().CPlusPlus && !FD->isExternC()) | |||
16992 | return false; | |||
16993 | ||||
16994 | // Stdcall, fastcall, and vectorcall need this special treatment. | |||
16995 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
16996 | switch (CC) { | |||
16997 | case CC_X86StdCall: | |||
16998 | case CC_X86FastCall: | |||
16999 | case CC_X86VectorCall: | |||
17000 | return true; | |||
17001 | default: | |||
17002 | break; | |||
17003 | } | |||
17004 | return false; | |||
17005 | } | |||
17006 | ||||
17007 | /// Require that all of the parameter types of function be complete. Normally, | |||
17008 | /// parameter types are only required to be complete when a function is called | |||
17009 | /// or defined, but to mangle functions with certain calling conventions, the | |||
17010 | /// mangler needs to know the size of the parameter list. In this situation, | |||
17011 | /// MSVC doesn't emit an error or instantiate templates. Instead, MSVC mangles | |||
17012 | /// the function as _foo@0, i.e. zero bytes of parameters, which will usually | |||
17013 | /// result in a linker error. Clang doesn't implement this behavior, and instead | |||
17014 | /// attempts to error at compile time. | |||
17015 | static void CheckCompleteParameterTypesForMangler(Sema &S, FunctionDecl *FD, | |||
17016 | SourceLocation Loc) { | |||
17017 | class ParamIncompleteTypeDiagnoser : public Sema::TypeDiagnoser { | |||
17018 | FunctionDecl *FD; | |||
17019 | ParmVarDecl *Param; | |||
17020 | ||||
17021 | public: | |||
17022 | ParamIncompleteTypeDiagnoser(FunctionDecl *FD, ParmVarDecl *Param) | |||
17023 | : FD(FD), Param(Param) {} | |||
17024 | ||||
17025 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { | |||
17026 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
17027 | StringRef CCName; | |||
17028 | switch (CC) { | |||
17029 | case CC_X86StdCall: | |||
17030 | CCName = "stdcall"; | |||
17031 | break; | |||
17032 | case CC_X86FastCall: | |||
17033 | CCName = "fastcall"; | |||
17034 | break; | |||
17035 | case CC_X86VectorCall: | |||
17036 | CCName = "vectorcall"; | |||
17037 | break; | |||
17038 | default: | |||
17039 | llvm_unreachable("CC does not need mangling")::llvm::llvm_unreachable_internal("CC does not need mangling" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 17039); | |||
17040 | } | |||
17041 | ||||
17042 | S.Diag(Loc, diag::err_cconv_incomplete_param_type) | |||
17043 | << Param->getDeclName() << FD->getDeclName() << CCName; | |||
17044 | } | |||
17045 | }; | |||
17046 | ||||
17047 | for (ParmVarDecl *Param : FD->parameters()) { | |||
17048 | ParamIncompleteTypeDiagnoser Diagnoser(FD, Param); | |||
17049 | S.RequireCompleteType(Loc, Param->getType(), Diagnoser); | |||
17050 | } | |||
17051 | } | |||
17052 | ||||
17053 | namespace { | |||
17054 | enum class OdrUseContext { | |||
17055 | /// Declarations in this context are not odr-used. | |||
17056 | None, | |||
17057 | /// Declarations in this context are formally odr-used, but this is a | |||
17058 | /// dependent context. | |||
17059 | Dependent, | |||
17060 | /// Declarations in this context are odr-used but not actually used (yet). | |||
17061 | FormallyOdrUsed, | |||
17062 | /// Declarations in this context are used. | |||
17063 | Used | |||
17064 | }; | |||
17065 | } | |||
17066 | ||||
17067 | /// Are we within a context in which references to resolved functions or to | |||
17068 | /// variables result in odr-use? | |||
17069 | static OdrUseContext isOdrUseContext(Sema &SemaRef) { | |||
17070 | OdrUseContext Result; | |||
17071 | ||||
17072 | switch (SemaRef.ExprEvalContexts.back().Context) { | |||
17073 | case Sema::ExpressionEvaluationContext::Unevaluated: | |||
17074 | case Sema::ExpressionEvaluationContext::UnevaluatedList: | |||
17075 | case Sema::ExpressionEvaluationContext::UnevaluatedAbstract: | |||
17076 | return OdrUseContext::None; | |||
17077 | ||||
17078 | case Sema::ExpressionEvaluationContext::ConstantEvaluated: | |||
17079 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluated: | |||
17080 | Result = OdrUseContext::Used; | |||
17081 | break; | |||
17082 | ||||
17083 | case Sema::ExpressionEvaluationContext::DiscardedStatement: | |||
17084 | Result = OdrUseContext::FormallyOdrUsed; | |||
17085 | break; | |||
17086 | ||||
17087 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
17088 | // A default argument formally results in odr-use, but doesn't actually | |||
17089 | // result in a use in any real sense until it itself is used. | |||
17090 | Result = OdrUseContext::FormallyOdrUsed; | |||
17091 | break; | |||
17092 | } | |||
17093 | ||||
17094 | if (SemaRef.CurContext->isDependentContext()) | |||
17095 | return OdrUseContext::Dependent; | |||
17096 | ||||
17097 | return Result; | |||
17098 | } | |||
17099 | ||||
17100 | static bool isImplicitlyDefinableConstexprFunction(FunctionDecl *Func) { | |||
17101 | if (!Func->isConstexpr()) | |||
17102 | return false; | |||
17103 | ||||
17104 | if (Func->isImplicitlyInstantiable() || !Func->isUserProvided()) | |||
17105 | return true; | |||
17106 | auto *CCD = dyn_cast<CXXConstructorDecl>(Func); | |||
17107 | return CCD && CCD->getInheritedConstructor(); | |||
17108 | } | |||
17109 | ||||
17110 | /// Mark a function referenced, and check whether it is odr-used | |||
17111 | /// (C++ [basic.def.odr]p2, C99 6.9p3) | |||
17112 | void Sema::MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func, | |||
17113 | bool MightBeOdrUse) { | |||
17114 | assert(Func && "No function?")(static_cast <bool> (Func && "No function?") ? void (0) : __assert_fail ("Func && \"No function?\"", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 17114, __extension__ __PRETTY_FUNCTION__)); | |||
17115 | ||||
17116 | Func->setReferenced(); | |||
17117 | ||||
17118 | // Recursive functions aren't really used until they're used from some other | |||
17119 | // context. | |||
17120 | bool IsRecursiveCall = CurContext == Func; | |||
17121 | ||||
17122 | // C++11 [basic.def.odr]p3: | |||
17123 | // A function whose name appears as a potentially-evaluated expression is | |||
17124 | // odr-used if it is the unique lookup result or the selected member of a | |||
17125 | // set of overloaded functions [...]. | |||
17126 | // | |||
17127 | // We (incorrectly) mark overload resolution as an unevaluated context, so we | |||
17128 | // can just check that here. | |||
17129 | OdrUseContext OdrUse = | |||
17130 | MightBeOdrUse ? isOdrUseContext(*this) : OdrUseContext::None; | |||
17131 | if (IsRecursiveCall && OdrUse == OdrUseContext::Used) | |||
17132 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
17133 | ||||
17134 | // Trivial default constructors and destructors are never actually used. | |||
17135 | // FIXME: What about other special members? | |||
17136 | if (Func->isTrivial() && !Func->hasAttr<DLLExportAttr>() && | |||
17137 | OdrUse == OdrUseContext::Used) { | |||
17138 | if (auto *Constructor = dyn_cast<CXXConstructorDecl>(Func)) | |||
17139 | if (Constructor->isDefaultConstructor()) | |||
17140 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
17141 | if (isa<CXXDestructorDecl>(Func)) | |||
17142 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
17143 | } | |||
17144 | ||||
17145 | // C++20 [expr.const]p12: | |||
17146 | // A function [...] is needed for constant evaluation if it is [...] a | |||
17147 | // constexpr function that is named by an expression that is potentially | |||
17148 | // constant evaluated | |||
17149 | bool NeededForConstantEvaluation = | |||
17150 | isPotentiallyConstantEvaluatedContext(*this) && | |||
17151 | isImplicitlyDefinableConstexprFunction(Func); | |||
17152 | ||||
17153 | // Determine whether we require a function definition to exist, per | |||
17154 | // C++11 [temp.inst]p3: | |||
17155 | // Unless a function template specialization has been explicitly | |||
17156 | // instantiated or explicitly specialized, the function template | |||
17157 | // specialization is implicitly instantiated when the specialization is | |||
17158 | // referenced in a context that requires a function definition to exist. | |||
17159 | // C++20 [temp.inst]p7: | |||
17160 | // The existence of a definition of a [...] function is considered to | |||
17161 | // affect the semantics of the program if the [...] function is needed for | |||
17162 | // constant evaluation by an expression | |||
17163 | // C++20 [basic.def.odr]p10: | |||
17164 | // Every program shall contain exactly one definition of every non-inline | |||
17165 | // function or variable that is odr-used in that program outside of a | |||
17166 | // discarded statement | |||
17167 | // C++20 [special]p1: | |||
17168 | // The implementation will implicitly define [defaulted special members] | |||
17169 | // if they are odr-used or needed for constant evaluation. | |||
17170 | // | |||
17171 | // Note that we skip the implicit instantiation of templates that are only | |||
17172 | // used in unused default arguments or by recursive calls to themselves. | |||
17173 | // This is formally non-conforming, but seems reasonable in practice. | |||
17174 | bool NeedDefinition = !IsRecursiveCall && (OdrUse == OdrUseContext::Used || | |||
17175 | NeededForConstantEvaluation); | |||
17176 | ||||
17177 | // C++14 [temp.expl.spec]p6: | |||
17178 | // If a template [...] is explicitly specialized then that specialization | |||
17179 | // shall be declared before the first use of that specialization that would | |||
17180 | // cause an implicit instantiation to take place, in every translation unit | |||
17181 | // in which such a use occurs | |||
17182 | if (NeedDefinition && | |||
17183 | (Func->getTemplateSpecializationKind() != TSK_Undeclared || | |||
17184 | Func->getMemberSpecializationInfo())) | |||
17185 | checkSpecializationVisibility(Loc, Func); | |||
17186 | ||||
17187 | if (getLangOpts().CUDA) | |||
17188 | CheckCUDACall(Loc, Func); | |||
17189 | ||||
17190 | if (getLangOpts().SYCLIsDevice) | |||
17191 | checkSYCLDeviceFunction(Loc, Func); | |||
17192 | ||||
17193 | // If we need a definition, try to create one. | |||
17194 | if (NeedDefinition && !Func->getBody()) { | |||
17195 | runWithSufficientStackSpace(Loc, [&] { | |||
17196 | if (CXXConstructorDecl *Constructor = | |||
17197 | dyn_cast<CXXConstructorDecl>(Func)) { | |||
17198 | Constructor = cast<CXXConstructorDecl>(Constructor->getFirstDecl()); | |||
17199 | if (Constructor->isDefaulted() && !Constructor->isDeleted()) { | |||
17200 | if (Constructor->isDefaultConstructor()) { | |||
17201 | if (Constructor->isTrivial() && | |||
17202 | !Constructor->hasAttr<DLLExportAttr>()) | |||
17203 | return; | |||
17204 | DefineImplicitDefaultConstructor(Loc, Constructor); | |||
17205 | } else if (Constructor->isCopyConstructor()) { | |||
17206 | DefineImplicitCopyConstructor(Loc, Constructor); | |||
17207 | } else if (Constructor->isMoveConstructor()) { | |||
17208 | DefineImplicitMoveConstructor(Loc, Constructor); | |||
17209 | } | |||
17210 | } else if (Constructor->getInheritedConstructor()) { | |||
17211 | DefineInheritingConstructor(Loc, Constructor); | |||
17212 | } | |||
17213 | } else if (CXXDestructorDecl *Destructor = | |||
17214 | dyn_cast<CXXDestructorDecl>(Func)) { | |||
17215 | Destructor = cast<CXXDestructorDecl>(Destructor->getFirstDecl()); | |||
17216 | if (Destructor->isDefaulted() && !Destructor->isDeleted()) { | |||
17217 | if (Destructor->isTrivial() && !Destructor->hasAttr<DLLExportAttr>()) | |||
17218 | return; | |||
17219 | DefineImplicitDestructor(Loc, Destructor); | |||
17220 | } | |||
17221 | if (Destructor->isVirtual() && getLangOpts().AppleKext) | |||
17222 | MarkVTableUsed(Loc, Destructor->getParent()); | |||
17223 | } else if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(Func)) { | |||
17224 | if (MethodDecl->isOverloadedOperator() && | |||
17225 | MethodDecl->getOverloadedOperator() == OO_Equal) { | |||
17226 | MethodDecl = cast<CXXMethodDecl>(MethodDecl->getFirstDecl()); | |||
17227 | if (MethodDecl->isDefaulted() && !MethodDecl->isDeleted()) { | |||
17228 | if (MethodDecl->isCopyAssignmentOperator()) | |||
17229 | DefineImplicitCopyAssignment(Loc, MethodDecl); | |||
17230 | else if (MethodDecl->isMoveAssignmentOperator()) | |||
17231 | DefineImplicitMoveAssignment(Loc, MethodDecl); | |||
17232 | } | |||
17233 | } else if (isa<CXXConversionDecl>(MethodDecl) && | |||
17234 | MethodDecl->getParent()->isLambda()) { | |||
17235 | CXXConversionDecl *Conversion = | |||
17236 | cast<CXXConversionDecl>(MethodDecl->getFirstDecl()); | |||
17237 | if (Conversion->isLambdaToBlockPointerConversion()) | |||
17238 | DefineImplicitLambdaToBlockPointerConversion(Loc, Conversion); | |||
17239 | else | |||
17240 | DefineImplicitLambdaToFunctionPointerConversion(Loc, Conversion); | |||
17241 | } else if (MethodDecl->isVirtual() && getLangOpts().AppleKext) | |||
17242 | MarkVTableUsed(Loc, MethodDecl->getParent()); | |||
17243 | } | |||
17244 | ||||
17245 | if (Func->isDefaulted() && !Func->isDeleted()) { | |||
17246 | DefaultedComparisonKind DCK = getDefaultedComparisonKind(Func); | |||
17247 | if (DCK != DefaultedComparisonKind::None) | |||
17248 | DefineDefaultedComparison(Loc, Func, DCK); | |||
17249 | } | |||
17250 | ||||
17251 | // Implicit instantiation of function templates and member functions of | |||
17252 | // class templates. | |||
17253 | if (Func->isImplicitlyInstantiable()) { | |||
17254 | TemplateSpecializationKind TSK = | |||
17255 | Func->getTemplateSpecializationKindForInstantiation(); | |||
17256 | SourceLocation PointOfInstantiation = Func->getPointOfInstantiation(); | |||
17257 | bool FirstInstantiation = PointOfInstantiation.isInvalid(); | |||
17258 | if (FirstInstantiation) { | |||
17259 | PointOfInstantiation = Loc; | |||
17260 | if (auto *MSI = Func->getMemberSpecializationInfo()) | |||
17261 | MSI->setPointOfInstantiation(Loc); | |||
17262 | // FIXME: Notify listener. | |||
17263 | else | |||
17264 | Func->setTemplateSpecializationKind(TSK, PointOfInstantiation); | |||
17265 | } else if (TSK != TSK_ImplicitInstantiation) { | |||
17266 | // Use the point of use as the point of instantiation, instead of the | |||
17267 | // point of explicit instantiation (which we track as the actual point | |||
17268 | // of instantiation). This gives better backtraces in diagnostics. | |||
17269 | PointOfInstantiation = Loc; | |||
17270 | } | |||
17271 | ||||
17272 | if (FirstInstantiation || TSK != TSK_ImplicitInstantiation || | |||
17273 | Func->isConstexpr()) { | |||
17274 | if (isa<CXXRecordDecl>(Func->getDeclContext()) && | |||
17275 | cast<CXXRecordDecl>(Func->getDeclContext())->isLocalClass() && | |||
17276 | CodeSynthesisContexts.size()) | |||
17277 | PendingLocalImplicitInstantiations.push_back( | |||
17278 | std::make_pair(Func, PointOfInstantiation)); | |||
17279 | else if (Func->isConstexpr()) | |||
17280 | // Do not defer instantiations of constexpr functions, to avoid the | |||
17281 | // expression evaluator needing to call back into Sema if it sees a | |||
17282 | // call to such a function. | |||
17283 | InstantiateFunctionDefinition(PointOfInstantiation, Func); | |||
17284 | else { | |||
17285 | Func->setInstantiationIsPending(true); | |||
17286 | PendingInstantiations.push_back( | |||
17287 | std::make_pair(Func, PointOfInstantiation)); | |||
17288 | // Notify the consumer that a function was implicitly instantiated. | |||
17289 | Consumer.HandleCXXImplicitFunctionInstantiation(Func); | |||
17290 | } | |||
17291 | } | |||
17292 | } else { | |||
17293 | // Walk redefinitions, as some of them may be instantiable. | |||
17294 | for (auto i : Func->redecls()) { | |||
17295 | if (!i->isUsed(false) && i->isImplicitlyInstantiable()) | |||
17296 | MarkFunctionReferenced(Loc, i, MightBeOdrUse); | |||
17297 | } | |||
17298 | } | |||
17299 | }); | |||
17300 | } | |||
17301 | ||||
17302 | // C++14 [except.spec]p17: | |||
17303 | // An exception-specification is considered to be needed when: | |||
17304 | // - the function is odr-used or, if it appears in an unevaluated operand, | |||
17305 | // would be odr-used if the expression were potentially-evaluated; | |||
17306 | // | |||
17307 | // Note, we do this even if MightBeOdrUse is false. That indicates that the | |||
17308 | // function is a pure virtual function we're calling, and in that case the | |||
17309 | // function was selected by overload resolution and we need to resolve its | |||
17310 | // exception specification for a different reason. | |||
17311 | const FunctionProtoType *FPT = Func->getType()->getAs<FunctionProtoType>(); | |||
17312 | if (FPT && isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) | |||
17313 | ResolveExceptionSpec(Loc, FPT); | |||
17314 | ||||
17315 | // If this is the first "real" use, act on that. | |||
17316 | if (OdrUse == OdrUseContext::Used && !Func->isUsed(/*CheckUsedAttr=*/false)) { | |||
17317 | // Keep track of used but undefined functions. | |||
17318 | if (!Func->isDefined()) { | |||
17319 | if (mightHaveNonExternalLinkage(Func)) | |||
17320 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
17321 | else if (Func->getMostRecentDecl()->isInlined() && | |||
17322 | !LangOpts.GNUInline && | |||
17323 | !Func->getMostRecentDecl()->hasAttr<GNUInlineAttr>()) | |||
17324 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
17325 | else if (isExternalWithNoLinkageType(Func)) | |||
17326 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
17327 | } | |||
17328 | ||||
17329 | // Some x86 Windows calling conventions mangle the size of the parameter | |||
17330 | // pack into the name. Computing the size of the parameters requires the | |||
17331 | // parameter types to be complete. Check that now. | |||
17332 | if (funcHasParameterSizeMangling(*this, Func)) | |||
17333 | CheckCompleteParameterTypesForMangler(*this, Func, Loc); | |||
17334 | ||||
17335 | // In the MS C++ ABI, the compiler emits destructor variants where they are | |||
17336 | // used. If the destructor is used here but defined elsewhere, mark the | |||
17337 | // virtual base destructors referenced. If those virtual base destructors | |||
17338 | // are inline, this will ensure they are defined when emitting the complete | |||
17339 | // destructor variant. This checking may be redundant if the destructor is | |||
17340 | // provided later in this TU. | |||
17341 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
17342 | if (auto *Dtor = dyn_cast<CXXDestructorDecl>(Func)) { | |||
17343 | CXXRecordDecl *Parent = Dtor->getParent(); | |||
17344 | if (Parent->getNumVBases() > 0 && !Dtor->getBody()) | |||
17345 | CheckCompleteDestructorVariant(Loc, Dtor); | |||
17346 | } | |||
17347 | } | |||
17348 | ||||
17349 | Func->markUsed(Context); | |||
17350 | } | |||
17351 | } | |||
17352 | ||||
17353 | /// Directly mark a variable odr-used. Given a choice, prefer to use | |||
17354 | /// MarkVariableReferenced since it does additional checks and then | |||
17355 | /// calls MarkVarDeclODRUsed. | |||
17356 | /// If the variable must be captured: | |||
17357 | /// - if FunctionScopeIndexToStopAt is null, capture it in the CurContext | |||
17358 | /// - else capture it in the DeclContext that maps to the | |||
17359 | /// *FunctionScopeIndexToStopAt on the FunctionScopeInfo stack. | |||
17360 | static void | |||
17361 | MarkVarDeclODRUsed(VarDecl *Var, SourceLocation Loc, Sema &SemaRef, | |||
17362 | const unsigned *const FunctionScopeIndexToStopAt = nullptr) { | |||
17363 | // Keep track of used but undefined variables. | |||
17364 | // FIXME: We shouldn't suppress this warning for static data members. | |||
17365 | if (Var->hasDefinition(SemaRef.Context) == VarDecl::DeclarationOnly && | |||
17366 | (!Var->isExternallyVisible() || Var->isInline() || | |||
17367 | SemaRef.isExternalWithNoLinkageType(Var)) && | |||
17368 | !(Var->isStaticDataMember() && Var->hasInit())) { | |||
17369 | SourceLocation &old = SemaRef.UndefinedButUsed[Var->getCanonicalDecl()]; | |||
17370 | if (old.isInvalid()) | |||
17371 | old = Loc; | |||
17372 | } | |||
17373 | QualType CaptureType, DeclRefType; | |||
17374 | if (SemaRef.LangOpts.OpenMP) | |||
17375 | SemaRef.tryCaptureOpenMPLambdas(Var); | |||
17376 | SemaRef.tryCaptureVariable(Var, Loc, Sema::TryCapture_Implicit, | |||
17377 | /*EllipsisLoc*/ SourceLocation(), | |||
17378 | /*BuildAndDiagnose*/ true, | |||
17379 | CaptureType, DeclRefType, | |||
17380 | FunctionScopeIndexToStopAt); | |||
17381 | ||||
17382 | if (SemaRef.LangOpts.CUDA && Var && Var->hasGlobalStorage()) { | |||
17383 | auto *FD = dyn_cast_or_null<FunctionDecl>(SemaRef.CurContext); | |||
17384 | auto VarTarget = SemaRef.IdentifyCUDATarget(Var); | |||
17385 | auto UserTarget = SemaRef.IdentifyCUDATarget(FD); | |||
17386 | if (VarTarget == Sema::CVT_Host && | |||
17387 | (UserTarget == Sema::CFT_Device || UserTarget == Sema::CFT_HostDevice || | |||
17388 | UserTarget == Sema::CFT_Global)) { | |||
17389 | // Diagnose ODR-use of host global variables in device functions. | |||
17390 | // Reference of device global variables in host functions is allowed | |||
17391 | // through shadow variables therefore it is not diagnosed. | |||
17392 | if (SemaRef.LangOpts.CUDAIsDevice) { | |||
17393 | SemaRef.targetDiag(Loc, diag::err_ref_bad_target) | |||
17394 | << /*host*/ 2 << /*variable*/ 1 << Var << UserTarget; | |||
17395 | SemaRef.targetDiag(Var->getLocation(), | |||
17396 | Var->getType().isConstQualified() | |||
17397 | ? diag::note_cuda_const_var_unpromoted | |||
17398 | : diag::note_cuda_host_var); | |||
17399 | } | |||
17400 | } else if (VarTarget == Sema::CVT_Device && | |||
17401 | (UserTarget == Sema::CFT_Host || | |||
17402 | UserTarget == Sema::CFT_HostDevice) && | |||
17403 | !Var->hasExternalStorage()) { | |||
17404 | // Record a CUDA/HIP device side variable if it is ODR-used | |||
17405 | // by host code. This is done conservatively, when the variable is | |||
17406 | // referenced in any of the following contexts: | |||
17407 | // - a non-function context | |||
17408 | // - a host function | |||
17409 | // - a host device function | |||
17410 | // This makes the ODR-use of the device side variable by host code to | |||
17411 | // be visible in the device compilation for the compiler to be able to | |||
17412 | // emit template variables instantiated by host code only and to | |||
17413 | // externalize the static device side variable ODR-used by host code. | |||
17414 | SemaRef.getASTContext().CUDADeviceVarODRUsedByHost.insert(Var); | |||
17415 | } | |||
17416 | } | |||
17417 | ||||
17418 | Var->markUsed(SemaRef.Context); | |||
17419 | } | |||
17420 | ||||
17421 | void Sema::MarkCaptureUsedInEnclosingContext(VarDecl *Capture, | |||
17422 | SourceLocation Loc, | |||
17423 | unsigned CapturingScopeIndex) { | |||
17424 | MarkVarDeclODRUsed(Capture, Loc, *this, &CapturingScopeIndex); | |||
17425 | } | |||
17426 | ||||
17427 | static void | |||
17428 | diagnoseUncapturableValueReference(Sema &S, SourceLocation loc, | |||
17429 | ValueDecl *var, DeclContext *DC) { | |||
17430 | DeclContext *VarDC = var->getDeclContext(); | |||
17431 | ||||
17432 | // If the parameter still belongs to the translation unit, then | |||
17433 | // we're actually just using one parameter in the declaration of | |||
17434 | // the next. | |||
17435 | if (isa<ParmVarDecl>(var) && | |||
17436 | isa<TranslationUnitDecl>(VarDC)) | |||
17437 | return; | |||
17438 | ||||
17439 | // For C code, don't diagnose about capture if we're not actually in code | |||
17440 | // right now; it's impossible to write a non-constant expression outside of | |||
17441 | // function context, so we'll get other (more useful) diagnostics later. | |||
17442 | // | |||
17443 | // For C++, things get a bit more nasty... it would be nice to suppress this | |||
17444 | // diagnostic for certain cases like using a local variable in an array bound | |||
17445 | // for a member of a local class, but the correct predicate is not obvious. | |||
17446 | if (!S.getLangOpts().CPlusPlus && !S.CurContext->isFunctionOrMethod()) | |||
17447 | return; | |||
17448 | ||||
17449 | unsigned ValueKind = isa<BindingDecl>(var) ? 1 : 0; | |||
17450 | unsigned ContextKind = 3; // unknown | |||
17451 | if (isa<CXXMethodDecl>(VarDC) && | |||
17452 | cast<CXXRecordDecl>(VarDC->getParent())->isLambda()) { | |||
17453 | ContextKind = 2; | |||
17454 | } else if (isa<FunctionDecl>(VarDC)) { | |||
17455 | ContextKind = 0; | |||
17456 | } else if (isa<BlockDecl>(VarDC)) { | |||
17457 | ContextKind = 1; | |||
17458 | } | |||
17459 | ||||
17460 | S.Diag(loc, diag::err_reference_to_local_in_enclosing_context) | |||
17461 | << var << ValueKind << ContextKind << VarDC; | |||
17462 | S.Diag(var->getLocation(), diag::note_entity_declared_at) | |||
17463 | << var; | |||
17464 | ||||
17465 | // FIXME: Add additional diagnostic info about class etc. which prevents | |||
17466 | // capture. | |||
17467 | } | |||
17468 | ||||
17469 | ||||
17470 | static bool isVariableAlreadyCapturedInScopeInfo(CapturingScopeInfo *CSI, VarDecl *Var, | |||
17471 | bool &SubCapturesAreNested, | |||
17472 | QualType &CaptureType, | |||
17473 | QualType &DeclRefType) { | |||
17474 | // Check whether we've already captured it. | |||
17475 | if (CSI->CaptureMap.count(Var)) { | |||
17476 | // If we found a capture, any subcaptures are nested. | |||
17477 | SubCapturesAreNested = true; | |||
17478 | ||||
17479 | // Retrieve the capture type for this variable. | |||
17480 | CaptureType = CSI->getCapture(Var).getCaptureType(); | |||
17481 | ||||
17482 | // Compute the type of an expression that refers to this variable. | |||
17483 | DeclRefType = CaptureType.getNonReferenceType(); | |||
17484 | ||||
17485 | // Similarly to mutable captures in lambda, all the OpenMP captures by copy | |||
17486 | // are mutable in the sense that user can change their value - they are | |||
17487 | // private instances of the captured declarations. | |||
17488 | const Capture &Cap = CSI->getCapture(Var); | |||
17489 | if (Cap.isCopyCapture() && | |||
17490 | !(isa<LambdaScopeInfo>(CSI) && cast<LambdaScopeInfo>(CSI)->Mutable) && | |||
17491 | !(isa<CapturedRegionScopeInfo>(CSI) && | |||
17492 | cast<CapturedRegionScopeInfo>(CSI)->CapRegionKind == CR_OpenMP)) | |||
17493 | DeclRefType.addConst(); | |||
17494 | return true; | |||
17495 | } | |||
17496 | return false; | |||
17497 | } | |||
17498 | ||||
17499 | // Only block literals, captured statements, and lambda expressions can | |||
17500 | // capture; other scopes don't work. | |||
17501 | static DeclContext *getParentOfCapturingContextOrNull(DeclContext *DC, VarDecl *Var, | |||
17502 | SourceLocation Loc, | |||
17503 | const bool Diagnose, Sema &S) { | |||
17504 | if (isa<BlockDecl>(DC) || isa<CapturedDecl>(DC) || isLambdaCallOperator(DC)) | |||
17505 | return getLambdaAwareParentOfDeclContext(DC); | |||
17506 | else if (Var->hasLocalStorage()) { | |||
17507 | if (Diagnose) | |||
17508 | diagnoseUncapturableValueReference(S, Loc, Var, DC); | |||
17509 | } | |||
17510 | return nullptr; | |||
17511 | } | |||
17512 | ||||
17513 | // Certain capturing entities (lambdas, blocks etc.) are not allowed to capture | |||
17514 | // certain types of variables (unnamed, variably modified types etc.) | |||
17515 | // so check for eligibility. | |||
17516 | static bool isVariableCapturable(CapturingScopeInfo *CSI, VarDecl *Var, | |||
17517 | SourceLocation Loc, | |||
17518 | const bool Diagnose, Sema &S) { | |||
17519 | ||||
17520 | bool IsBlock = isa<BlockScopeInfo>(CSI); | |||
17521 | bool IsLambda = isa<LambdaScopeInfo>(CSI); | |||
17522 | ||||
17523 | // Lambdas are not allowed to capture unnamed variables | |||
17524 | // (e.g. anonymous unions). | |||
17525 | // FIXME: The C++11 rule don't actually state this explicitly, but I'm | |||
17526 | // assuming that's the intent. | |||
17527 | if (IsLambda && !Var->getDeclName()) { | |||
17528 | if (Diagnose) { | |||
17529 | S.Diag(Loc, diag::err_lambda_capture_anonymous_var); | |||
17530 | S.Diag(Var->getLocation(), diag::note_declared_at); | |||
17531 | } | |||
17532 | return false; | |||
17533 | } | |||
17534 | ||||
17535 | // Prohibit variably-modified types in blocks; they're difficult to deal with. | |||
17536 | if (Var->getType()->isVariablyModifiedType() && IsBlock) { | |||
17537 | if (Diagnose) { | |||
17538 | S.Diag(Loc, diag::err_ref_vm_type); | |||
17539 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17540 | } | |||
17541 | return false; | |||
17542 | } | |||
17543 | // Prohibit structs with flexible array members too. | |||
17544 | // We cannot capture what is in the tail end of the struct. | |||
17545 | if (const RecordType *VTTy = Var->getType()->getAs<RecordType>()) { | |||
17546 | if (VTTy->getDecl()->hasFlexibleArrayMember()) { | |||
17547 | if (Diagnose) { | |||
17548 | if (IsBlock) | |||
17549 | S.Diag(Loc, diag::err_ref_flexarray_type); | |||
17550 | else | |||
17551 | S.Diag(Loc, diag::err_lambda_capture_flexarray_type) << Var; | |||
17552 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17553 | } | |||
17554 | return false; | |||
17555 | } | |||
17556 | } | |||
17557 | const bool HasBlocksAttr = Var->hasAttr<BlocksAttr>(); | |||
17558 | // Lambdas and captured statements are not allowed to capture __block | |||
17559 | // variables; they don't support the expected semantics. | |||
17560 | if (HasBlocksAttr && (IsLambda || isa<CapturedRegionScopeInfo>(CSI))) { | |||
17561 | if (Diagnose) { | |||
17562 | S.Diag(Loc, diag::err_capture_block_variable) << Var << !IsLambda; | |||
17563 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17564 | } | |||
17565 | return false; | |||
17566 | } | |||
17567 | // OpenCL v2.0 s6.12.5: Blocks cannot reference/capture other blocks | |||
17568 | if (S.getLangOpts().OpenCL && IsBlock && | |||
17569 | Var->getType()->isBlockPointerType()) { | |||
17570 | if (Diagnose) | |||
17571 | S.Diag(Loc, diag::err_opencl_block_ref_block); | |||
17572 | return false; | |||
17573 | } | |||
17574 | ||||
17575 | return true; | |||
17576 | } | |||
17577 | ||||
17578 | // Returns true if the capture by block was successful. | |||
17579 | static bool captureInBlock(BlockScopeInfo *BSI, VarDecl *Var, | |||
17580 | SourceLocation Loc, | |||
17581 | const bool BuildAndDiagnose, | |||
17582 | QualType &CaptureType, | |||
17583 | QualType &DeclRefType, | |||
17584 | const bool Nested, | |||
17585 | Sema &S, bool Invalid) { | |||
17586 | bool ByRef = false; | |||
17587 | ||||
17588 | // Blocks are not allowed to capture arrays, excepting OpenCL. | |||
17589 | // OpenCL v2.0 s1.12.5 (revision 40): arrays are captured by reference | |||
17590 | // (decayed to pointers). | |||
17591 | if (!Invalid && !S.getLangOpts().OpenCL && CaptureType->isArrayType()) { | |||
17592 | if (BuildAndDiagnose) { | |||
17593 | S.Diag(Loc, diag::err_ref_array_type); | |||
17594 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17595 | Invalid = true; | |||
17596 | } else { | |||
17597 | return false; | |||
17598 | } | |||
17599 | } | |||
17600 | ||||
17601 | // Forbid the block-capture of autoreleasing variables. | |||
17602 | if (!Invalid && | |||
17603 | CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) { | |||
17604 | if (BuildAndDiagnose) { | |||
17605 | S.Diag(Loc, diag::err_arc_autoreleasing_capture) | |||
17606 | << /*block*/ 0; | |||
17607 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17608 | Invalid = true; | |||
17609 | } else { | |||
17610 | return false; | |||
17611 | } | |||
17612 | } | |||
17613 | ||||
17614 | // Warn about implicitly autoreleasing indirect parameters captured by blocks. | |||
17615 | if (const auto *PT = CaptureType->getAs<PointerType>()) { | |||
17616 | QualType PointeeTy = PT->getPointeeType(); | |||
17617 | ||||
17618 | if (!Invalid && PointeeTy->getAs<ObjCObjectPointerType>() && | |||
17619 | PointeeTy.getObjCLifetime() == Qualifiers::OCL_Autoreleasing && | |||
17620 | !S.Context.hasDirectOwnershipQualifier(PointeeTy)) { | |||
17621 | if (BuildAndDiagnose) { | |||
17622 | SourceLocation VarLoc = Var->getLocation(); | |||
17623 | S.Diag(Loc, diag::warn_block_capture_autoreleasing); | |||
17624 | S.Diag(VarLoc, diag::note_declare_parameter_strong); | |||
17625 | } | |||
17626 | } | |||
17627 | } | |||
17628 | ||||
17629 | const bool HasBlocksAttr = Var->hasAttr<BlocksAttr>(); | |||
17630 | if (HasBlocksAttr || CaptureType->isReferenceType() || | |||
17631 | (S.getLangOpts().OpenMP && S.isOpenMPCapturedDecl(Var))) { | |||
17632 | // Block capture by reference does not change the capture or | |||
17633 | // declaration reference types. | |||
17634 | ByRef = true; | |||
17635 | } else { | |||
17636 | // Block capture by copy introduces 'const'. | |||
17637 | CaptureType = CaptureType.getNonReferenceType().withConst(); | |||
17638 | DeclRefType = CaptureType; | |||
17639 | } | |||
17640 | ||||
17641 | // Actually capture the variable. | |||
17642 | if (BuildAndDiagnose) | |||
17643 | BSI->addCapture(Var, HasBlocksAttr, ByRef, Nested, Loc, SourceLocation(), | |||
17644 | CaptureType, Invalid); | |||
17645 | ||||
17646 | return !Invalid; | |||
17647 | } | |||
17648 | ||||
17649 | ||||
17650 | /// Capture the given variable in the captured region. | |||
17651 | static bool captureInCapturedRegion( | |||
17652 | CapturedRegionScopeInfo *RSI, VarDecl *Var, SourceLocation Loc, | |||
17653 | const bool BuildAndDiagnose, QualType &CaptureType, QualType &DeclRefType, | |||
17654 | const bool RefersToCapturedVariable, Sema::TryCaptureKind Kind, | |||
17655 | bool IsTopScope, Sema &S, bool Invalid) { | |||
17656 | // By default, capture variables by reference. | |||
17657 | bool ByRef = true; | |||
17658 | if (IsTopScope && Kind != Sema::TryCapture_Implicit) { | |||
17659 | ByRef = (Kind == Sema::TryCapture_ExplicitByRef); | |||
17660 | } else if (S.getLangOpts().OpenMP && RSI->CapRegionKind == CR_OpenMP) { | |||
17661 | // Using an LValue reference type is consistent with Lambdas (see below). | |||
17662 | if (S.isOpenMPCapturedDecl(Var)) { | |||
17663 | bool HasConst = DeclRefType.isConstQualified(); | |||
17664 | DeclRefType = DeclRefType.getUnqualifiedType(); | |||
17665 | // Don't lose diagnostics about assignments to const. | |||
17666 | if (HasConst) | |||
17667 | DeclRefType.addConst(); | |||
17668 | } | |||
17669 | // Do not capture firstprivates in tasks. | |||
17670 | if (S.isOpenMPPrivateDecl(Var, RSI->OpenMPLevel, RSI->OpenMPCaptureLevel) != | |||
17671 | OMPC_unknown) | |||
17672 | return true; | |||
17673 | ByRef = S.isOpenMPCapturedByRef(Var, RSI->OpenMPLevel, | |||
17674 | RSI->OpenMPCaptureLevel); | |||
17675 | } | |||
17676 | ||||
17677 | if (ByRef) | |||
17678 | CaptureType = S.Context.getLValueReferenceType(DeclRefType); | |||
17679 | else | |||
17680 | CaptureType = DeclRefType; | |||
17681 | ||||
17682 | // Actually capture the variable. | |||
17683 | if (BuildAndDiagnose) | |||
17684 | RSI->addCapture(Var, /*isBlock*/ false, ByRef, RefersToCapturedVariable, | |||
17685 | Loc, SourceLocation(), CaptureType, Invalid); | |||
17686 | ||||
17687 | return !Invalid; | |||
17688 | } | |||
17689 | ||||
17690 | /// Capture the given variable in the lambda. | |||
17691 | static bool captureInLambda(LambdaScopeInfo *LSI, | |||
17692 | VarDecl *Var, | |||
17693 | SourceLocation Loc, | |||
17694 | const bool BuildAndDiagnose, | |||
17695 | QualType &CaptureType, | |||
17696 | QualType &DeclRefType, | |||
17697 | const bool RefersToCapturedVariable, | |||
17698 | const Sema::TryCaptureKind Kind, | |||
17699 | SourceLocation EllipsisLoc, | |||
17700 | const bool IsTopScope, | |||
17701 | Sema &S, bool Invalid) { | |||
17702 | // Determine whether we are capturing by reference or by value. | |||
17703 | bool ByRef = false; | |||
17704 | if (IsTopScope && Kind != Sema::TryCapture_Implicit) { | |||
17705 | ByRef = (Kind == Sema::TryCapture_ExplicitByRef); | |||
17706 | } else { | |||
17707 | ByRef = (LSI->ImpCaptureStyle == LambdaScopeInfo::ImpCap_LambdaByref); | |||
17708 | } | |||
17709 | ||||
17710 | // Compute the type of the field that will capture this variable. | |||
17711 | if (ByRef) { | |||
17712 | // C++11 [expr.prim.lambda]p15: | |||
17713 | // An entity is captured by reference if it is implicitly or | |||
17714 | // explicitly captured but not captured by copy. It is | |||
17715 | // unspecified whether additional unnamed non-static data | |||
17716 | // members are declared in the closure type for entities | |||
17717 | // captured by reference. | |||
17718 | // | |||
17719 | // FIXME: It is not clear whether we want to build an lvalue reference | |||
17720 | // to the DeclRefType or to CaptureType.getNonReferenceType(). GCC appears | |||
17721 | // to do the former, while EDG does the latter. Core issue 1249 will | |||
17722 | // clarify, but for now we follow GCC because it's a more permissive and | |||
17723 | // easily defensible position. | |||
17724 | CaptureType = S.Context.getLValueReferenceType(DeclRefType); | |||
17725 | } else { | |||
17726 | // C++11 [expr.prim.lambda]p14: | |||
17727 | // For each entity captured by copy, an unnamed non-static | |||
17728 | // data member is declared in the closure type. The | |||
17729 | // declaration order of these members is unspecified. The type | |||
17730 | // of such a data member is the type of the corresponding | |||
17731 | // captured entity if the entity is not a reference to an | |||
17732 | // object, or the referenced type otherwise. [Note: If the | |||
17733 | // captured entity is a reference to a function, the | |||
17734 | // corresponding data member is also a reference to a | |||
17735 | // function. - end note ] | |||
17736 | if (const ReferenceType *RefType = CaptureType->getAs<ReferenceType>()){ | |||
17737 | if (!RefType->getPointeeType()->isFunctionType()) | |||
17738 | CaptureType = RefType->getPointeeType(); | |||
17739 | } | |||
17740 | ||||
17741 | // Forbid the lambda copy-capture of autoreleasing variables. | |||
17742 | if (!Invalid && | |||
17743 | CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) { | |||
17744 | if (BuildAndDiagnose) { | |||
17745 | S.Diag(Loc, diag::err_arc_autoreleasing_capture) << /*lambda*/ 1; | |||
17746 | S.Diag(Var->getLocation(), diag::note_previous_decl) | |||
17747 | << Var->getDeclName(); | |||
17748 | Invalid = true; | |||
17749 | } else { | |||
17750 | return false; | |||
17751 | } | |||
17752 | } | |||
17753 | ||||
17754 | // Make sure that by-copy captures are of a complete and non-abstract type. | |||
17755 | if (!Invalid && BuildAndDiagnose) { | |||
17756 | if (!CaptureType->isDependentType() && | |||
17757 | S.RequireCompleteSizedType( | |||
17758 | Loc, CaptureType, | |||
17759 | diag::err_capture_of_incomplete_or_sizeless_type, | |||
17760 | Var->getDeclName())) | |||
17761 | Invalid = true; | |||
17762 | else if (S.RequireNonAbstractType(Loc, CaptureType, | |||
17763 | diag::err_capture_of_abstract_type)) | |||
17764 | Invalid = true; | |||
17765 | } | |||
17766 | } | |||
17767 | ||||
17768 | // Compute the type of a reference to this captured variable. | |||
17769 | if (ByRef) | |||
17770 | DeclRefType = CaptureType.getNonReferenceType(); | |||
17771 | else { | |||
17772 | // C++ [expr.prim.lambda]p5: | |||
17773 | // The closure type for a lambda-expression has a public inline | |||
17774 | // function call operator [...]. This function call operator is | |||
17775 | // declared const (9.3.1) if and only if the lambda-expression's | |||
17776 | // parameter-declaration-clause is not followed by mutable. | |||
17777 | DeclRefType = CaptureType.getNonReferenceType(); | |||
17778 | if (!LSI->Mutable && !CaptureType->isReferenceType()) | |||
17779 | DeclRefType.addConst(); | |||
17780 | } | |||
17781 | ||||
17782 | // Add the capture. | |||
17783 | if (BuildAndDiagnose) | |||
17784 | LSI->addCapture(Var, /*isBlock=*/false, ByRef, RefersToCapturedVariable, | |||
17785 | Loc, EllipsisLoc, CaptureType, Invalid); | |||
17786 | ||||
17787 | return !Invalid; | |||
17788 | } | |||
17789 | ||||
17790 | static bool canCaptureVariableByCopy(VarDecl *Var, const ASTContext &Context) { | |||
17791 | // Offer a Copy fix even if the type is dependent. | |||
17792 | if (Var->getType()->isDependentType()) | |||
17793 | return true; | |||
17794 | QualType T = Var->getType().getNonReferenceType(); | |||
17795 | if (T.isTriviallyCopyableType(Context)) | |||
17796 | return true; | |||
17797 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) { | |||
17798 | ||||
17799 | if (!(RD = RD->getDefinition())) | |||
17800 | return false; | |||
17801 | if (RD->hasSimpleCopyConstructor()) | |||
17802 | return true; | |||
17803 | if (RD->hasUserDeclaredCopyConstructor()) | |||
17804 | for (CXXConstructorDecl *Ctor : RD->ctors()) | |||
17805 | if (Ctor->isCopyConstructor()) | |||
17806 | return !Ctor->isDeleted(); | |||
17807 | } | |||
17808 | return false; | |||
17809 | } | |||
17810 | ||||
17811 | /// Create up to 4 fix-its for explicit reference and value capture of \p Var or | |||
17812 | /// default capture. Fixes may be omitted if they aren't allowed by the | |||
17813 | /// standard, for example we can't emit a default copy capture fix-it if we | |||
17814 | /// already explicitly copy capture capture another variable. | |||
17815 | static void buildLambdaCaptureFixit(Sema &Sema, LambdaScopeInfo *LSI, | |||
17816 | VarDecl *Var) { | |||
17817 | assert(LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None)(static_cast <bool> (LSI->ImpCaptureStyle == CapturingScopeInfo ::ImpCap_None) ? void (0) : __assert_fail ("LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 17817, __extension__ __PRETTY_FUNCTION__)); | |||
17818 | // Don't offer Capture by copy of default capture by copy fixes if Var is | |||
17819 | // known not to be copy constructible. | |||
17820 | bool ShouldOfferCopyFix = canCaptureVariableByCopy(Var, Sema.getASTContext()); | |||
17821 | ||||
17822 | SmallString<32> FixBuffer; | |||
17823 | StringRef Separator = LSI->NumExplicitCaptures > 0 ? ", " : ""; | |||
17824 | if (Var->getDeclName().isIdentifier() && !Var->getName().empty()) { | |||
17825 | SourceLocation VarInsertLoc = LSI->IntroducerRange.getEnd(); | |||
17826 | if (ShouldOfferCopyFix) { | |||
17827 | // Offer fixes to insert an explicit capture for the variable. | |||
17828 | // [] -> [VarName] | |||
17829 | // [OtherCapture] -> [OtherCapture, VarName] | |||
17830 | FixBuffer.assign({Separator, Var->getName()}); | |||
17831 | Sema.Diag(VarInsertLoc, diag::note_lambda_variable_capture_fixit) | |||
17832 | << Var << /*value*/ 0 | |||
17833 | << FixItHint::CreateInsertion(VarInsertLoc, FixBuffer); | |||
17834 | } | |||
17835 | // As above but capture by reference. | |||
17836 | FixBuffer.assign({Separator, "&", Var->getName()}); | |||
17837 | Sema.Diag(VarInsertLoc, diag::note_lambda_variable_capture_fixit) | |||
17838 | << Var << /*reference*/ 1 | |||
17839 | << FixItHint::CreateInsertion(VarInsertLoc, FixBuffer); | |||
17840 | } | |||
17841 | ||||
17842 | // Only try to offer default capture if there are no captures excluding this | |||
17843 | // and init captures. | |||
17844 | // [this]: OK. | |||
17845 | // [X = Y]: OK. | |||
17846 | // [&A, &B]: Don't offer. | |||
17847 | // [A, B]: Don't offer. | |||
17848 | if (llvm::any_of(LSI->Captures, [](Capture &C) { | |||
17849 | return !C.isThisCapture() && !C.isInitCapture(); | |||
17850 | })) | |||
17851 | return; | |||
17852 | ||||
17853 | // The default capture specifiers, '=' or '&', must appear first in the | |||
17854 | // capture body. | |||
17855 | SourceLocation DefaultInsertLoc = | |||
17856 | LSI->IntroducerRange.getBegin().getLocWithOffset(1); | |||
17857 | ||||
17858 | if (ShouldOfferCopyFix) { | |||
17859 | bool CanDefaultCopyCapture = true; | |||
17860 | // [=, *this] OK since c++17 | |||
17861 | // [=, this] OK since c++20 | |||
17862 | if (LSI->isCXXThisCaptured() && !Sema.getLangOpts().CPlusPlus20) | |||
17863 | CanDefaultCopyCapture = Sema.getLangOpts().CPlusPlus17 | |||
17864 | ? LSI->getCXXThisCapture().isCopyCapture() | |||
17865 | : false; | |||
17866 | // We can't use default capture by copy if any captures already specified | |||
17867 | // capture by copy. | |||
17868 | if (CanDefaultCopyCapture && llvm::none_of(LSI->Captures, [](Capture &C) { | |||
17869 | return !C.isThisCapture() && !C.isInitCapture() && C.isCopyCapture(); | |||
17870 | })) { | |||
17871 | FixBuffer.assign({"=", Separator}); | |||
17872 | Sema.Diag(DefaultInsertLoc, diag::note_lambda_default_capture_fixit) | |||
17873 | << /*value*/ 0 | |||
17874 | << FixItHint::CreateInsertion(DefaultInsertLoc, FixBuffer); | |||
17875 | } | |||
17876 | } | |||
17877 | ||||
17878 | // We can't use default capture by reference if any captures already specified | |||
17879 | // capture by reference. | |||
17880 | if (llvm::none_of(LSI->Captures, [](Capture &C) { | |||
17881 | return !C.isInitCapture() && C.isReferenceCapture() && | |||
17882 | !C.isThisCapture(); | |||
17883 | })) { | |||
17884 | FixBuffer.assign({"&", Separator}); | |||
17885 | Sema.Diag(DefaultInsertLoc, diag::note_lambda_default_capture_fixit) | |||
17886 | << /*reference*/ 1 | |||
17887 | << FixItHint::CreateInsertion(DefaultInsertLoc, FixBuffer); | |||
17888 | } | |||
17889 | } | |||
17890 | ||||
17891 | bool Sema::tryCaptureVariable( | |||
17892 | VarDecl *Var, SourceLocation ExprLoc, TryCaptureKind Kind, | |||
17893 | SourceLocation EllipsisLoc, bool BuildAndDiagnose, QualType &CaptureType, | |||
17894 | QualType &DeclRefType, const unsigned *const FunctionScopeIndexToStopAt) { | |||
17895 | // An init-capture is notionally from the context surrounding its | |||
17896 | // declaration, but its parent DC is the lambda class. | |||
17897 | DeclContext *VarDC = Var->getDeclContext(); | |||
17898 | if (Var->isInitCapture()) | |||
17899 | VarDC = VarDC->getParent(); | |||
17900 | ||||
17901 | DeclContext *DC = CurContext; | |||
17902 | const unsigned MaxFunctionScopesIndex = FunctionScopeIndexToStopAt | |||
17903 | ? *FunctionScopeIndexToStopAt : FunctionScopes.size() - 1; | |||
17904 | // We need to sync up the Declaration Context with the | |||
17905 | // FunctionScopeIndexToStopAt | |||
17906 | if (FunctionScopeIndexToStopAt) { | |||
17907 | unsigned FSIndex = FunctionScopes.size() - 1; | |||
17908 | while (FSIndex != MaxFunctionScopesIndex) { | |||
17909 | DC = getLambdaAwareParentOfDeclContext(DC); | |||
17910 | --FSIndex; | |||
17911 | } | |||
17912 | } | |||
17913 | ||||
17914 | ||||
17915 | // If the variable is declared in the current context, there is no need to | |||
17916 | // capture it. | |||
17917 | if (VarDC == DC) return true; | |||
17918 | ||||
17919 | // Capture global variables if it is required to use private copy of this | |||
17920 | // variable. | |||
17921 | bool IsGlobal = !Var->hasLocalStorage(); | |||
17922 | if (IsGlobal && | |||
17923 | !(LangOpts.OpenMP && isOpenMPCapturedDecl(Var, /*CheckScopeInfo=*/true, | |||
17924 | MaxFunctionScopesIndex))) | |||
17925 | return true; | |||
17926 | Var = Var->getCanonicalDecl(); | |||
17927 | ||||
17928 | // Walk up the stack to determine whether we can capture the variable, | |||
17929 | // performing the "simple" checks that don't depend on type. We stop when | |||
17930 | // we've either hit the declared scope of the variable or find an existing | |||
17931 | // capture of that variable. We start from the innermost capturing-entity | |||
17932 | // (the DC) and ensure that all intervening capturing-entities | |||
17933 | // (blocks/lambdas etc.) between the innermost capturer and the variable`s | |||
17934 | // declcontext can either capture the variable or have already captured | |||
17935 | // the variable. | |||
17936 | CaptureType = Var->getType(); | |||
17937 | DeclRefType = CaptureType.getNonReferenceType(); | |||
17938 | bool Nested = false; | |||
17939 | bool Explicit = (Kind != TryCapture_Implicit); | |||
17940 | unsigned FunctionScopesIndex = MaxFunctionScopesIndex; | |||
17941 | do { | |||
17942 | // Only block literals, captured statements, and lambda expressions can | |||
17943 | // capture; other scopes don't work. | |||
17944 | DeclContext *ParentDC = getParentOfCapturingContextOrNull(DC, Var, | |||
17945 | ExprLoc, | |||
17946 | BuildAndDiagnose, | |||
17947 | *this); | |||
17948 | // We need to check for the parent *first* because, if we *have* | |||
17949 | // private-captured a global variable, we need to recursively capture it in | |||
17950 | // intermediate blocks, lambdas, etc. | |||
17951 | if (!ParentDC) { | |||
17952 | if (IsGlobal) { | |||
17953 | FunctionScopesIndex = MaxFunctionScopesIndex - 1; | |||
17954 | break; | |||
17955 | } | |||
17956 | return true; | |||
17957 | } | |||
17958 | ||||
17959 | FunctionScopeInfo *FSI = FunctionScopes[FunctionScopesIndex]; | |||
17960 | CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FSI); | |||
17961 | ||||
17962 | ||||
17963 | // Check whether we've already captured it. | |||
17964 | if (isVariableAlreadyCapturedInScopeInfo(CSI, Var, Nested, CaptureType, | |||
17965 | DeclRefType)) { | |||
17966 | CSI->getCapture(Var).markUsed(BuildAndDiagnose); | |||
17967 | break; | |||
17968 | } | |||
17969 | // If we are instantiating a generic lambda call operator body, | |||
17970 | // we do not want to capture new variables. What was captured | |||
17971 | // during either a lambdas transformation or initial parsing | |||
17972 | // should be used. | |||
17973 | if (isGenericLambdaCallOperatorSpecialization(DC)) { | |||
17974 | if (BuildAndDiagnose) { | |||
17975 | LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CSI); | |||
17976 | if (LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None) { | |||
17977 | Diag(ExprLoc, diag::err_lambda_impcap) << Var; | |||
17978 | Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
17979 | Diag(LSI->Lambda->getBeginLoc(), diag::note_lambda_decl); | |||
17980 | buildLambdaCaptureFixit(*this, LSI, Var); | |||
17981 | } else | |||
17982 | diagnoseUncapturableValueReference(*this, ExprLoc, Var, DC); | |||
17983 | } | |||
17984 | return true; | |||
17985 | } | |||
17986 | ||||
17987 | // Try to capture variable-length arrays types. | |||
17988 | if (Var->getType()->isVariablyModifiedType()) { | |||
17989 | // We're going to walk down into the type and look for VLA | |||
17990 | // expressions. | |||
17991 | QualType QTy = Var->getType(); | |||
17992 | if (ParmVarDecl *PVD = dyn_cast_or_null<ParmVarDecl>(Var)) | |||
17993 | QTy = PVD->getOriginalType(); | |||
17994 | captureVariablyModifiedType(Context, QTy, CSI); | |||
17995 | } | |||
17996 | ||||
17997 | if (getLangOpts().OpenMP) { | |||
17998 | if (auto *RSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) { | |||
17999 | // OpenMP private variables should not be captured in outer scope, so | |||
18000 | // just break here. Similarly, global variables that are captured in a | |||
18001 | // target region should not be captured outside the scope of the region. | |||
18002 | if (RSI->CapRegionKind == CR_OpenMP) { | |||
18003 | OpenMPClauseKind IsOpenMPPrivateDecl = isOpenMPPrivateDecl( | |||
18004 | Var, RSI->OpenMPLevel, RSI->OpenMPCaptureLevel); | |||
18005 | // If the variable is private (i.e. not captured) and has variably | |||
18006 | // modified type, we still need to capture the type for correct | |||
18007 | // codegen in all regions, associated with the construct. Currently, | |||
18008 | // it is captured in the innermost captured region only. | |||
18009 | if (IsOpenMPPrivateDecl != OMPC_unknown && | |||
18010 | Var->getType()->isVariablyModifiedType()) { | |||
18011 | QualType QTy = Var->getType(); | |||
18012 | if (ParmVarDecl *PVD = dyn_cast_or_null<ParmVarDecl>(Var)) | |||
18013 | QTy = PVD->getOriginalType(); | |||
18014 | for (int I = 1, E = getNumberOfConstructScopes(RSI->OpenMPLevel); | |||
18015 | I < E; ++I) { | |||
18016 | auto *OuterRSI = cast<CapturedRegionScopeInfo>( | |||
18017 | FunctionScopes[FunctionScopesIndex - I]); | |||
18018 | assert(RSI->OpenMPLevel == OuterRSI->OpenMPLevel &&(static_cast <bool> (RSI->OpenMPLevel == OuterRSI-> OpenMPLevel && "Wrong number of captured regions associated with the " "OpenMP construct.") ? void (0) : __assert_fail ("RSI->OpenMPLevel == OuterRSI->OpenMPLevel && \"Wrong number of captured regions associated with the \" \"OpenMP construct.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18020, __extension__ __PRETTY_FUNCTION__)) | |||
18019 | "Wrong number of captured regions associated with the "(static_cast <bool> (RSI->OpenMPLevel == OuterRSI-> OpenMPLevel && "Wrong number of captured regions associated with the " "OpenMP construct.") ? void (0) : __assert_fail ("RSI->OpenMPLevel == OuterRSI->OpenMPLevel && \"Wrong number of captured regions associated with the \" \"OpenMP construct.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18020, __extension__ __PRETTY_FUNCTION__)) | |||
18020 | "OpenMP construct.")(static_cast <bool> (RSI->OpenMPLevel == OuterRSI-> OpenMPLevel && "Wrong number of captured regions associated with the " "OpenMP construct.") ? void (0) : __assert_fail ("RSI->OpenMPLevel == OuterRSI->OpenMPLevel && \"Wrong number of captured regions associated with the \" \"OpenMP construct.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18020, __extension__ __PRETTY_FUNCTION__)); | |||
18021 | captureVariablyModifiedType(Context, QTy, OuterRSI); | |||
18022 | } | |||
18023 | } | |||
18024 | bool IsTargetCap = | |||
18025 | IsOpenMPPrivateDecl != OMPC_private && | |||
18026 | isOpenMPTargetCapturedDecl(Var, RSI->OpenMPLevel, | |||
18027 | RSI->OpenMPCaptureLevel); | |||
18028 | // Do not capture global if it is not privatized in outer regions. | |||
18029 | bool IsGlobalCap = | |||
18030 | IsGlobal && isOpenMPGlobalCapturedDecl(Var, RSI->OpenMPLevel, | |||
18031 | RSI->OpenMPCaptureLevel); | |||
18032 | ||||
18033 | // When we detect target captures we are looking from inside the | |||
18034 | // target region, therefore we need to propagate the capture from the | |||
18035 | // enclosing region. Therefore, the capture is not initially nested. | |||
18036 | if (IsTargetCap) | |||
18037 | adjustOpenMPTargetScopeIndex(FunctionScopesIndex, RSI->OpenMPLevel); | |||
18038 | ||||
18039 | if (IsTargetCap || IsOpenMPPrivateDecl == OMPC_private || | |||
18040 | (IsGlobal && !IsGlobalCap)) { | |||
18041 | Nested = !IsTargetCap; | |||
18042 | bool HasConst = DeclRefType.isConstQualified(); | |||
18043 | DeclRefType = DeclRefType.getUnqualifiedType(); | |||
18044 | // Don't lose diagnostics about assignments to const. | |||
18045 | if (HasConst) | |||
18046 | DeclRefType.addConst(); | |||
18047 | CaptureType = Context.getLValueReferenceType(DeclRefType); | |||
18048 | break; | |||
18049 | } | |||
18050 | } | |||
18051 | } | |||
18052 | } | |||
18053 | if (CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None && !Explicit) { | |||
18054 | // No capture-default, and this is not an explicit capture | |||
18055 | // so cannot capture this variable. | |||
18056 | if (BuildAndDiagnose) { | |||
18057 | Diag(ExprLoc, diag::err_lambda_impcap) << Var; | |||
18058 | Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18059 | auto *LSI = cast<LambdaScopeInfo>(CSI); | |||
18060 | if (LSI->Lambda) { | |||
18061 | Diag(LSI->Lambda->getBeginLoc(), diag::note_lambda_decl); | |||
18062 | buildLambdaCaptureFixit(*this, LSI, Var); | |||
18063 | } | |||
18064 | // FIXME: If we error out because an outer lambda can not implicitly | |||
18065 | // capture a variable that an inner lambda explicitly captures, we | |||
18066 | // should have the inner lambda do the explicit capture - because | |||
18067 | // it makes for cleaner diagnostics later. This would purely be done | |||
18068 | // so that the diagnostic does not misleadingly claim that a variable | |||
18069 | // can not be captured by a lambda implicitly even though it is captured | |||
18070 | // explicitly. Suggestion: | |||
18071 | // - create const bool VariableCaptureWasInitiallyExplicit = Explicit | |||
18072 | // at the function head | |||
18073 | // - cache the StartingDeclContext - this must be a lambda | |||
18074 | // - captureInLambda in the innermost lambda the variable. | |||
18075 | } | |||
18076 | return true; | |||
18077 | } | |||
18078 | ||||
18079 | FunctionScopesIndex--; | |||
18080 | DC = ParentDC; | |||
18081 | Explicit = false; | |||
18082 | } while (!VarDC->Equals(DC)); | |||
18083 | ||||
18084 | // Walk back down the scope stack, (e.g. from outer lambda to inner lambda) | |||
18085 | // computing the type of the capture at each step, checking type-specific | |||
18086 | // requirements, and adding captures if requested. | |||
18087 | // If the variable had already been captured previously, we start capturing | |||
18088 | // at the lambda nested within that one. | |||
18089 | bool Invalid = false; | |||
18090 | for (unsigned I = ++FunctionScopesIndex, N = MaxFunctionScopesIndex + 1; I != N; | |||
18091 | ++I) { | |||
18092 | CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FunctionScopes[I]); | |||
18093 | ||||
18094 | // Certain capturing entities (lambdas, blocks etc.) are not allowed to capture | |||
18095 | // certain types of variables (unnamed, variably modified types etc.) | |||
18096 | // so check for eligibility. | |||
18097 | if (!Invalid) | |||
18098 | Invalid = | |||
18099 | !isVariableCapturable(CSI, Var, ExprLoc, BuildAndDiagnose, *this); | |||
18100 | ||||
18101 | // After encountering an error, if we're actually supposed to capture, keep | |||
18102 | // capturing in nested contexts to suppress any follow-on diagnostics. | |||
18103 | if (Invalid && !BuildAndDiagnose) | |||
18104 | return true; | |||
18105 | ||||
18106 | if (BlockScopeInfo *BSI = dyn_cast<BlockScopeInfo>(CSI)) { | |||
18107 | Invalid = !captureInBlock(BSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, | |||
18108 | DeclRefType, Nested, *this, Invalid); | |||
18109 | Nested = true; | |||
18110 | } else if (CapturedRegionScopeInfo *RSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) { | |||
18111 | Invalid = !captureInCapturedRegion( | |||
18112 | RSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, DeclRefType, Nested, | |||
18113 | Kind, /*IsTopScope*/ I == N - 1, *this, Invalid); | |||
18114 | Nested = true; | |||
18115 | } else { | |||
18116 | LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CSI); | |||
18117 | Invalid = | |||
18118 | !captureInLambda(LSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, | |||
18119 | DeclRefType, Nested, Kind, EllipsisLoc, | |||
18120 | /*IsTopScope*/ I == N - 1, *this, Invalid); | |||
18121 | Nested = true; | |||
18122 | } | |||
18123 | ||||
18124 | if (Invalid && !BuildAndDiagnose) | |||
18125 | return true; | |||
18126 | } | |||
18127 | return Invalid; | |||
18128 | } | |||
18129 | ||||
18130 | bool Sema::tryCaptureVariable(VarDecl *Var, SourceLocation Loc, | |||
18131 | TryCaptureKind Kind, SourceLocation EllipsisLoc) { | |||
18132 | QualType CaptureType; | |||
18133 | QualType DeclRefType; | |||
18134 | return tryCaptureVariable(Var, Loc, Kind, EllipsisLoc, | |||
18135 | /*BuildAndDiagnose=*/true, CaptureType, | |||
18136 | DeclRefType, nullptr); | |||
18137 | } | |||
18138 | ||||
18139 | bool Sema::NeedToCaptureVariable(VarDecl *Var, SourceLocation Loc) { | |||
18140 | QualType CaptureType; | |||
18141 | QualType DeclRefType; | |||
18142 | return !tryCaptureVariable(Var, Loc, TryCapture_Implicit, SourceLocation(), | |||
18143 | /*BuildAndDiagnose=*/false, CaptureType, | |||
18144 | DeclRefType, nullptr); | |||
18145 | } | |||
18146 | ||||
18147 | QualType Sema::getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc) { | |||
18148 | QualType CaptureType; | |||
18149 | QualType DeclRefType; | |||
18150 | ||||
18151 | // Determine whether we can capture this variable. | |||
18152 | if (tryCaptureVariable(Var, Loc, TryCapture_Implicit, SourceLocation(), | |||
18153 | /*BuildAndDiagnose=*/false, CaptureType, | |||
18154 | DeclRefType, nullptr)) | |||
18155 | return QualType(); | |||
18156 | ||||
18157 | return DeclRefType; | |||
18158 | } | |||
18159 | ||||
18160 | namespace { | |||
18161 | // Helper to copy the template arguments from a DeclRefExpr or MemberExpr. | |||
18162 | // The produced TemplateArgumentListInfo* points to data stored within this | |||
18163 | // object, so should only be used in contexts where the pointer will not be | |||
18164 | // used after the CopiedTemplateArgs object is destroyed. | |||
18165 | class CopiedTemplateArgs { | |||
18166 | bool HasArgs; | |||
18167 | TemplateArgumentListInfo TemplateArgStorage; | |||
18168 | public: | |||
18169 | template<typename RefExpr> | |||
18170 | CopiedTemplateArgs(RefExpr *E) : HasArgs(E->hasExplicitTemplateArgs()) { | |||
18171 | if (HasArgs) | |||
18172 | E->copyTemplateArgumentsInto(TemplateArgStorage); | |||
18173 | } | |||
18174 | operator TemplateArgumentListInfo*() | |||
18175 | #ifdef __has_cpp_attribute | |||
18176 | #if0 __has_cpp_attribute(clang::lifetimebound)1 | |||
18177 | [[clang::lifetimebound]] | |||
18178 | #endif | |||
18179 | #endif | |||
18180 | { | |||
18181 | return HasArgs ? &TemplateArgStorage : nullptr; | |||
18182 | } | |||
18183 | }; | |||
18184 | } | |||
18185 | ||||
18186 | /// Walk the set of potential results of an expression and mark them all as | |||
18187 | /// non-odr-uses if they satisfy the side-conditions of the NonOdrUseReason. | |||
18188 | /// | |||
18189 | /// \return A new expression if we found any potential results, ExprEmpty() if | |||
18190 | /// not, and ExprError() if we diagnosed an error. | |||
18191 | static ExprResult rebuildPotentialResultsAsNonOdrUsed(Sema &S, Expr *E, | |||
18192 | NonOdrUseReason NOUR) { | |||
18193 | // Per C++11 [basic.def.odr], a variable is odr-used "unless it is | |||
18194 | // an object that satisfies the requirements for appearing in a | |||
18195 | // constant expression (5.19) and the lvalue-to-rvalue conversion (4.1) | |||
18196 | // is immediately applied." This function handles the lvalue-to-rvalue | |||
18197 | // conversion part. | |||
18198 | // | |||
18199 | // If we encounter a node that claims to be an odr-use but shouldn't be, we | |||
18200 | // transform it into the relevant kind of non-odr-use node and rebuild the | |||
18201 | // tree of nodes leading to it. | |||
18202 | // | |||
18203 | // This is a mini-TreeTransform that only transforms a restricted subset of | |||
18204 | // nodes (and only certain operands of them). | |||
18205 | ||||
18206 | // Rebuild a subexpression. | |||
18207 | auto Rebuild = [&](Expr *Sub) { | |||
18208 | return rebuildPotentialResultsAsNonOdrUsed(S, Sub, NOUR); | |||
18209 | }; | |||
18210 | ||||
18211 | // Check whether a potential result satisfies the requirements of NOUR. | |||
18212 | auto IsPotentialResultOdrUsed = [&](NamedDecl *D) { | |||
18213 | // Any entity other than a VarDecl is always odr-used whenever it's named | |||
18214 | // in a potentially-evaluated expression. | |||
18215 | auto *VD = dyn_cast<VarDecl>(D); | |||
18216 | if (!VD) | |||
18217 | return true; | |||
18218 | ||||
18219 | // C++2a [basic.def.odr]p4: | |||
18220 | // A variable x whose name appears as a potentially-evalauted expression | |||
18221 | // e is odr-used by e unless | |||
18222 | // -- x is a reference that is usable in constant expressions, or | |||
18223 | // -- x is a variable of non-reference type that is usable in constant | |||
18224 | // expressions and has no mutable subobjects, and e is an element of | |||
18225 | // the set of potential results of an expression of | |||
18226 | // non-volatile-qualified non-class type to which the lvalue-to-rvalue | |||
18227 | // conversion is applied, or | |||
18228 | // -- x is a variable of non-reference type, and e is an element of the | |||
18229 | // set of potential results of a discarded-value expression to which | |||
18230 | // the lvalue-to-rvalue conversion is not applied | |||
18231 | // | |||
18232 | // We check the first bullet and the "potentially-evaluated" condition in | |||
18233 | // BuildDeclRefExpr. We check the type requirements in the second bullet | |||
18234 | // in CheckLValueToRValueConversionOperand below. | |||
18235 | switch (NOUR) { | |||
18236 | case NOUR_None: | |||
18237 | case NOUR_Unevaluated: | |||
18238 | llvm_unreachable("unexpected non-odr-use-reason")::llvm::llvm_unreachable_internal("unexpected non-odr-use-reason" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18238); | |||
18239 | ||||
18240 | case NOUR_Constant: | |||
18241 | // Constant references were handled when they were built. | |||
18242 | if (VD->getType()->isReferenceType()) | |||
18243 | return true; | |||
18244 | if (auto *RD = VD->getType()->getAsCXXRecordDecl()) | |||
18245 | if (RD->hasMutableFields()) | |||
18246 | return true; | |||
18247 | if (!VD->isUsableInConstantExpressions(S.Context)) | |||
18248 | return true; | |||
18249 | break; | |||
18250 | ||||
18251 | case NOUR_Discarded: | |||
18252 | if (VD->getType()->isReferenceType()) | |||
18253 | return true; | |||
18254 | break; | |||
18255 | } | |||
18256 | return false; | |||
18257 | }; | |||
18258 | ||||
18259 | // Mark that this expression does not constitute an odr-use. | |||
18260 | auto MarkNotOdrUsed = [&] { | |||
18261 | S.MaybeODRUseExprs.remove(E); | |||
18262 | if (LambdaScopeInfo *LSI = S.getCurLambda()) | |||
18263 | LSI->markVariableExprAsNonODRUsed(E); | |||
18264 | }; | |||
18265 | ||||
18266 | // C++2a [basic.def.odr]p2: | |||
18267 | // The set of potential results of an expression e is defined as follows: | |||
18268 | switch (E->getStmtClass()) { | |||
18269 | // -- If e is an id-expression, ... | |||
18270 | case Expr::DeclRefExprClass: { | |||
18271 | auto *DRE = cast<DeclRefExpr>(E); | |||
18272 | if (DRE->isNonOdrUse() || IsPotentialResultOdrUsed(DRE->getDecl())) | |||
18273 | break; | |||
18274 | ||||
18275 | // Rebuild as a non-odr-use DeclRefExpr. | |||
18276 | MarkNotOdrUsed(); | |||
18277 | return DeclRefExpr::Create( | |||
18278 | S.Context, DRE->getQualifierLoc(), DRE->getTemplateKeywordLoc(), | |||
18279 | DRE->getDecl(), DRE->refersToEnclosingVariableOrCapture(), | |||
18280 | DRE->getNameInfo(), DRE->getType(), DRE->getValueKind(), | |||
18281 | DRE->getFoundDecl(), CopiedTemplateArgs(DRE), NOUR); | |||
18282 | } | |||
18283 | ||||
18284 | case Expr::FunctionParmPackExprClass: { | |||
18285 | auto *FPPE = cast<FunctionParmPackExpr>(E); | |||
18286 | // If any of the declarations in the pack is odr-used, then the expression | |||
18287 | // as a whole constitutes an odr-use. | |||
18288 | for (VarDecl *D : *FPPE) | |||
18289 | if (IsPotentialResultOdrUsed(D)) | |||
18290 | return ExprEmpty(); | |||
18291 | ||||
18292 | // FIXME: Rebuild as a non-odr-use FunctionParmPackExpr? In practice, | |||
18293 | // nothing cares about whether we marked this as an odr-use, but it might | |||
18294 | // be useful for non-compiler tools. | |||
18295 | MarkNotOdrUsed(); | |||
18296 | break; | |||
18297 | } | |||
18298 | ||||
18299 | // -- If e is a subscripting operation with an array operand... | |||
18300 | case Expr::ArraySubscriptExprClass: { | |||
18301 | auto *ASE = cast<ArraySubscriptExpr>(E); | |||
18302 | Expr *OldBase = ASE->getBase()->IgnoreImplicit(); | |||
18303 | if (!OldBase->getType()->isArrayType()) | |||
18304 | break; | |||
18305 | ExprResult Base = Rebuild(OldBase); | |||
18306 | if (!Base.isUsable()) | |||
18307 | return Base; | |||
18308 | Expr *LHS = ASE->getBase() == ASE->getLHS() ? Base.get() : ASE->getLHS(); | |||
18309 | Expr *RHS = ASE->getBase() == ASE->getRHS() ? Base.get() : ASE->getRHS(); | |||
18310 | SourceLocation LBracketLoc = ASE->getBeginLoc(); // FIXME: Not stored. | |||
18311 | return S.ActOnArraySubscriptExpr(nullptr, LHS, LBracketLoc, RHS, | |||
18312 | ASE->getRBracketLoc()); | |||
18313 | } | |||
18314 | ||||
18315 | case Expr::MemberExprClass: { | |||
18316 | auto *ME = cast<MemberExpr>(E); | |||
18317 | // -- If e is a class member access expression [...] naming a non-static | |||
18318 | // data member... | |||
18319 | if (isa<FieldDecl>(ME->getMemberDecl())) { | |||
18320 | ExprResult Base = Rebuild(ME->getBase()); | |||
18321 | if (!Base.isUsable()) | |||
18322 | return Base; | |||
18323 | return MemberExpr::Create( | |||
18324 | S.Context, Base.get(), ME->isArrow(), ME->getOperatorLoc(), | |||
18325 | ME->getQualifierLoc(), ME->getTemplateKeywordLoc(), | |||
18326 | ME->getMemberDecl(), ME->getFoundDecl(), ME->getMemberNameInfo(), | |||
18327 | CopiedTemplateArgs(ME), ME->getType(), ME->getValueKind(), | |||
18328 | ME->getObjectKind(), ME->isNonOdrUse()); | |||
18329 | } | |||
18330 | ||||
18331 | if (ME->getMemberDecl()->isCXXInstanceMember()) | |||
18332 | break; | |||
18333 | ||||
18334 | // -- If e is a class member access expression naming a static data member, | |||
18335 | // ... | |||
18336 | if (ME->isNonOdrUse() || IsPotentialResultOdrUsed(ME->getMemberDecl())) | |||
18337 | break; | |||
18338 | ||||
18339 | // Rebuild as a non-odr-use MemberExpr. | |||
18340 | MarkNotOdrUsed(); | |||
18341 | return MemberExpr::Create( | |||
18342 | S.Context, ME->getBase(), ME->isArrow(), ME->getOperatorLoc(), | |||
18343 | ME->getQualifierLoc(), ME->getTemplateKeywordLoc(), ME->getMemberDecl(), | |||
18344 | ME->getFoundDecl(), ME->getMemberNameInfo(), CopiedTemplateArgs(ME), | |||
18345 | ME->getType(), ME->getValueKind(), ME->getObjectKind(), NOUR); | |||
18346 | } | |||
18347 | ||||
18348 | case Expr::BinaryOperatorClass: { | |||
18349 | auto *BO = cast<BinaryOperator>(E); | |||
18350 | Expr *LHS = BO->getLHS(); | |||
18351 | Expr *RHS = BO->getRHS(); | |||
18352 | // -- If e is a pointer-to-member expression of the form e1 .* e2 ... | |||
18353 | if (BO->getOpcode() == BO_PtrMemD) { | |||
18354 | ExprResult Sub = Rebuild(LHS); | |||
18355 | if (!Sub.isUsable()) | |||
18356 | return Sub; | |||
18357 | LHS = Sub.get(); | |||
18358 | // -- If e is a comma expression, ... | |||
18359 | } else if (BO->getOpcode() == BO_Comma) { | |||
18360 | ExprResult Sub = Rebuild(RHS); | |||
18361 | if (!Sub.isUsable()) | |||
18362 | return Sub; | |||
18363 | RHS = Sub.get(); | |||
18364 | } else { | |||
18365 | break; | |||
18366 | } | |||
18367 | return S.BuildBinOp(nullptr, BO->getOperatorLoc(), BO->getOpcode(), | |||
18368 | LHS, RHS); | |||
18369 | } | |||
18370 | ||||
18371 | // -- If e has the form (e1)... | |||
18372 | case Expr::ParenExprClass: { | |||
18373 | auto *PE = cast<ParenExpr>(E); | |||
18374 | ExprResult Sub = Rebuild(PE->getSubExpr()); | |||
18375 | if (!Sub.isUsable()) | |||
18376 | return Sub; | |||
18377 | return S.ActOnParenExpr(PE->getLParen(), PE->getRParen(), Sub.get()); | |||
18378 | } | |||
18379 | ||||
18380 | // -- If e is a glvalue conditional expression, ... | |||
18381 | // We don't apply this to a binary conditional operator. FIXME: Should we? | |||
18382 | case Expr::ConditionalOperatorClass: { | |||
18383 | auto *CO = cast<ConditionalOperator>(E); | |||
18384 | ExprResult LHS = Rebuild(CO->getLHS()); | |||
18385 | if (LHS.isInvalid()) | |||
18386 | return ExprError(); | |||
18387 | ExprResult RHS = Rebuild(CO->getRHS()); | |||
18388 | if (RHS.isInvalid()) | |||
18389 | return ExprError(); | |||
18390 | if (!LHS.isUsable() && !RHS.isUsable()) | |||
18391 | return ExprEmpty(); | |||
18392 | if (!LHS.isUsable()) | |||
18393 | LHS = CO->getLHS(); | |||
18394 | if (!RHS.isUsable()) | |||
18395 | RHS = CO->getRHS(); | |||
18396 | return S.ActOnConditionalOp(CO->getQuestionLoc(), CO->getColonLoc(), | |||
18397 | CO->getCond(), LHS.get(), RHS.get()); | |||
18398 | } | |||
18399 | ||||
18400 | // [Clang extension] | |||
18401 | // -- If e has the form __extension__ e1... | |||
18402 | case Expr::UnaryOperatorClass: { | |||
18403 | auto *UO = cast<UnaryOperator>(E); | |||
18404 | if (UO->getOpcode() != UO_Extension) | |||
18405 | break; | |||
18406 | ExprResult Sub = Rebuild(UO->getSubExpr()); | |||
18407 | if (!Sub.isUsable()) | |||
18408 | return Sub; | |||
18409 | return S.BuildUnaryOp(nullptr, UO->getOperatorLoc(), UO_Extension, | |||
18410 | Sub.get()); | |||
18411 | } | |||
18412 | ||||
18413 | // [Clang extension] | |||
18414 | // -- If e has the form _Generic(...), the set of potential results is the | |||
18415 | // union of the sets of potential results of the associated expressions. | |||
18416 | case Expr::GenericSelectionExprClass: { | |||
18417 | auto *GSE = cast<GenericSelectionExpr>(E); | |||
18418 | ||||
18419 | SmallVector<Expr *, 4> AssocExprs; | |||
18420 | bool AnyChanged = false; | |||
18421 | for (Expr *OrigAssocExpr : GSE->getAssocExprs()) { | |||
18422 | ExprResult AssocExpr = Rebuild(OrigAssocExpr); | |||
18423 | if (AssocExpr.isInvalid()) | |||
18424 | return ExprError(); | |||
18425 | if (AssocExpr.isUsable()) { | |||
18426 | AssocExprs.push_back(AssocExpr.get()); | |||
18427 | AnyChanged = true; | |||
18428 | } else { | |||
18429 | AssocExprs.push_back(OrigAssocExpr); | |||
18430 | } | |||
18431 | } | |||
18432 | ||||
18433 | return AnyChanged ? S.CreateGenericSelectionExpr( | |||
18434 | GSE->getGenericLoc(), GSE->getDefaultLoc(), | |||
18435 | GSE->getRParenLoc(), GSE->getControllingExpr(), | |||
18436 | GSE->getAssocTypeSourceInfos(), AssocExprs) | |||
18437 | : ExprEmpty(); | |||
18438 | } | |||
18439 | ||||
18440 | // [Clang extension] | |||
18441 | // -- If e has the form __builtin_choose_expr(...), the set of potential | |||
18442 | // results is the union of the sets of potential results of the | |||
18443 | // second and third subexpressions. | |||
18444 | case Expr::ChooseExprClass: { | |||
18445 | auto *CE = cast<ChooseExpr>(E); | |||
18446 | ||||
18447 | ExprResult LHS = Rebuild(CE->getLHS()); | |||
18448 | if (LHS.isInvalid()) | |||
18449 | return ExprError(); | |||
18450 | ||||
18451 | ExprResult RHS = Rebuild(CE->getLHS()); | |||
18452 | if (RHS.isInvalid()) | |||
18453 | return ExprError(); | |||
18454 | ||||
18455 | if (!LHS.get() && !RHS.get()) | |||
18456 | return ExprEmpty(); | |||
18457 | if (!LHS.isUsable()) | |||
18458 | LHS = CE->getLHS(); | |||
18459 | if (!RHS.isUsable()) | |||
18460 | RHS = CE->getRHS(); | |||
18461 | ||||
18462 | return S.ActOnChooseExpr(CE->getBuiltinLoc(), CE->getCond(), LHS.get(), | |||
18463 | RHS.get(), CE->getRParenLoc()); | |||
18464 | } | |||
18465 | ||||
18466 | // Step through non-syntactic nodes. | |||
18467 | case Expr::ConstantExprClass: { | |||
18468 | auto *CE = cast<ConstantExpr>(E); | |||
18469 | ExprResult Sub = Rebuild(CE->getSubExpr()); | |||
18470 | if (!Sub.isUsable()) | |||
18471 | return Sub; | |||
18472 | return ConstantExpr::Create(S.Context, Sub.get()); | |||
18473 | } | |||
18474 | ||||
18475 | // We could mostly rely on the recursive rebuilding to rebuild implicit | |||
18476 | // casts, but not at the top level, so rebuild them here. | |||
18477 | case Expr::ImplicitCastExprClass: { | |||
18478 | auto *ICE = cast<ImplicitCastExpr>(E); | |||
18479 | // Only step through the narrow set of cast kinds we expect to encounter. | |||
18480 | // Anything else suggests we've left the region in which potential results | |||
18481 | // can be found. | |||
18482 | switch (ICE->getCastKind()) { | |||
18483 | case CK_NoOp: | |||
18484 | case CK_DerivedToBase: | |||
18485 | case CK_UncheckedDerivedToBase: { | |||
18486 | ExprResult Sub = Rebuild(ICE->getSubExpr()); | |||
18487 | if (!Sub.isUsable()) | |||
18488 | return Sub; | |||
18489 | CXXCastPath Path(ICE->path()); | |||
18490 | return S.ImpCastExprToType(Sub.get(), ICE->getType(), ICE->getCastKind(), | |||
18491 | ICE->getValueKind(), &Path); | |||
18492 | } | |||
18493 | ||||
18494 | default: | |||
18495 | break; | |||
18496 | } | |||
18497 | break; | |||
18498 | } | |||
18499 | ||||
18500 | default: | |||
18501 | break; | |||
18502 | } | |||
18503 | ||||
18504 | // Can't traverse through this node. Nothing to do. | |||
18505 | return ExprEmpty(); | |||
18506 | } | |||
18507 | ||||
18508 | ExprResult Sema::CheckLValueToRValueConversionOperand(Expr *E) { | |||
18509 | // Check whether the operand is or contains an object of non-trivial C union | |||
18510 | // type. | |||
18511 | if (E->getType().isVolatileQualified() && | |||
18512 | (E->getType().hasNonTrivialToPrimitiveDestructCUnion() || | |||
18513 | E->getType().hasNonTrivialToPrimitiveCopyCUnion())) | |||
18514 | checkNonTrivialCUnion(E->getType(), E->getExprLoc(), | |||
18515 | Sema::NTCUC_LValueToRValueVolatile, | |||
18516 | NTCUK_Destruct|NTCUK_Copy); | |||
18517 | ||||
18518 | // C++2a [basic.def.odr]p4: | |||
18519 | // [...] an expression of non-volatile-qualified non-class type to which | |||
18520 | // the lvalue-to-rvalue conversion is applied [...] | |||
18521 | if (E->getType().isVolatileQualified() || E->getType()->getAs<RecordType>()) | |||
18522 | return E; | |||
18523 | ||||
18524 | ExprResult Result = | |||
18525 | rebuildPotentialResultsAsNonOdrUsed(*this, E, NOUR_Constant); | |||
18526 | if (Result.isInvalid()) | |||
18527 | return ExprError(); | |||
18528 | return Result.get() ? Result : E; | |||
18529 | } | |||
18530 | ||||
18531 | ExprResult Sema::ActOnConstantExpression(ExprResult Res) { | |||
18532 | Res = CorrectDelayedTyposInExpr(Res); | |||
18533 | ||||
18534 | if (!Res.isUsable()) | |||
18535 | return Res; | |||
18536 | ||||
18537 | // If a constant-expression is a reference to a variable where we delay | |||
18538 | // deciding whether it is an odr-use, just assume we will apply the | |||
18539 | // lvalue-to-rvalue conversion. In the one case where this doesn't happen | |||
18540 | // (a non-type template argument), we have special handling anyway. | |||
18541 | return CheckLValueToRValueConversionOperand(Res.get()); | |||
18542 | } | |||
18543 | ||||
18544 | void Sema::CleanupVarDeclMarking() { | |||
18545 | // Iterate through a local copy in case MarkVarDeclODRUsed makes a recursive | |||
18546 | // call. | |||
18547 | MaybeODRUseExprSet LocalMaybeODRUseExprs; | |||
18548 | std::swap(LocalMaybeODRUseExprs, MaybeODRUseExprs); | |||
18549 | ||||
18550 | for (Expr *E : LocalMaybeODRUseExprs) { | |||
18551 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
18552 | MarkVarDeclODRUsed(cast<VarDecl>(DRE->getDecl()), | |||
18553 | DRE->getLocation(), *this); | |||
18554 | } else if (auto *ME = dyn_cast<MemberExpr>(E)) { | |||
18555 | MarkVarDeclODRUsed(cast<VarDecl>(ME->getMemberDecl()), ME->getMemberLoc(), | |||
18556 | *this); | |||
18557 | } else if (auto *FP = dyn_cast<FunctionParmPackExpr>(E)) { | |||
18558 | for (VarDecl *VD : *FP) | |||
18559 | MarkVarDeclODRUsed(VD, FP->getParameterPackLocation(), *this); | |||
18560 | } else { | |||
18561 | llvm_unreachable("Unexpected expression")::llvm::llvm_unreachable_internal("Unexpected expression", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18561); | |||
18562 | } | |||
18563 | } | |||
18564 | ||||
18565 | assert(MaybeODRUseExprs.empty() &&(static_cast <bool> (MaybeODRUseExprs.empty() && "MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18566, __extension__ __PRETTY_FUNCTION__)) | |||
18566 | "MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?")(static_cast <bool> (MaybeODRUseExprs.empty() && "MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18566, __extension__ __PRETTY_FUNCTION__)); | |||
18567 | } | |||
18568 | ||||
18569 | static void DoMarkVarDeclReferenced( | |||
18570 | Sema &SemaRef, SourceLocation Loc, VarDecl *Var, Expr *E, | |||
18571 | llvm::DenseMap<const VarDecl *, int> &RefsMinusAssignments) { | |||
18572 | assert((!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) ||(static_cast <bool> ((!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>( E)) && "Invalid Expr argument to DoMarkVarDeclReferenced" ) ? void (0) : __assert_fail ("(!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>(E)) && \"Invalid Expr argument to DoMarkVarDeclReferenced\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18574, __extension__ __PRETTY_FUNCTION__)) | |||
18573 | isa<FunctionParmPackExpr>(E)) &&(static_cast <bool> ((!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>( E)) && "Invalid Expr argument to DoMarkVarDeclReferenced" ) ? void (0) : __assert_fail ("(!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>(E)) && \"Invalid Expr argument to DoMarkVarDeclReferenced\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18574, __extension__ __PRETTY_FUNCTION__)) | |||
18574 | "Invalid Expr argument to DoMarkVarDeclReferenced")(static_cast <bool> ((!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>( E)) && "Invalid Expr argument to DoMarkVarDeclReferenced" ) ? void (0) : __assert_fail ("(!E || isa<DeclRefExpr>(E) || isa<MemberExpr>(E) || isa<FunctionParmPackExpr>(E)) && \"Invalid Expr argument to DoMarkVarDeclReferenced\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18574, __extension__ __PRETTY_FUNCTION__)); | |||
18575 | Var->setReferenced(); | |||
18576 | ||||
18577 | if (Var->isInvalidDecl()) | |||
18578 | return; | |||
18579 | ||||
18580 | auto *MSI = Var->getMemberSpecializationInfo(); | |||
18581 | TemplateSpecializationKind TSK = MSI ? MSI->getTemplateSpecializationKind() | |||
18582 | : Var->getTemplateSpecializationKind(); | |||
18583 | ||||
18584 | OdrUseContext OdrUse = isOdrUseContext(SemaRef); | |||
18585 | bool UsableInConstantExpr = | |||
18586 | Var->mightBeUsableInConstantExpressions(SemaRef.Context); | |||
18587 | ||||
18588 | if (Var->isLocalVarDeclOrParm() && !Var->hasExternalStorage()) { | |||
18589 | RefsMinusAssignments.insert({Var, 0}).first->getSecond()++; | |||
18590 | } | |||
18591 | ||||
18592 | // C++20 [expr.const]p12: | |||
18593 | // A variable [...] is needed for constant evaluation if it is [...] a | |||
18594 | // variable whose name appears as a potentially constant evaluated | |||
18595 | // expression that is either a contexpr variable or is of non-volatile | |||
18596 | // const-qualified integral type or of reference type | |||
18597 | bool NeededForConstantEvaluation = | |||
18598 | isPotentiallyConstantEvaluatedContext(SemaRef) && UsableInConstantExpr; | |||
18599 | ||||
18600 | bool NeedDefinition = | |||
18601 | OdrUse == OdrUseContext::Used || NeededForConstantEvaluation; | |||
18602 | ||||
18603 | assert(!isa<VarTemplatePartialSpecializationDecl>(Var) &&(static_cast <bool> (!isa<VarTemplatePartialSpecializationDecl >(Var) && "Can't instantiate a partial template specialization." ) ? void (0) : __assert_fail ("!isa<VarTemplatePartialSpecializationDecl>(Var) && \"Can't instantiate a partial template specialization.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18604, __extension__ __PRETTY_FUNCTION__)) | |||
18604 | "Can't instantiate a partial template specialization.")(static_cast <bool> (!isa<VarTemplatePartialSpecializationDecl >(Var) && "Can't instantiate a partial template specialization." ) ? void (0) : __assert_fail ("!isa<VarTemplatePartialSpecializationDecl>(Var) && \"Can't instantiate a partial template specialization.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18604, __extension__ __PRETTY_FUNCTION__)); | |||
18605 | ||||
18606 | // If this might be a member specialization of a static data member, check | |||
18607 | // the specialization is visible. We already did the checks for variable | |||
18608 | // template specializations when we created them. | |||
18609 | if (NeedDefinition && TSK != TSK_Undeclared && | |||
18610 | !isa<VarTemplateSpecializationDecl>(Var)) | |||
18611 | SemaRef.checkSpecializationVisibility(Loc, Var); | |||
18612 | ||||
18613 | // Perform implicit instantiation of static data members, static data member | |||
18614 | // templates of class templates, and variable template specializations. Delay | |||
18615 | // instantiations of variable templates, except for those that could be used | |||
18616 | // in a constant expression. | |||
18617 | if (NeedDefinition && isTemplateInstantiation(TSK)) { | |||
18618 | // Per C++17 [temp.explicit]p10, we may instantiate despite an explicit | |||
18619 | // instantiation declaration if a variable is usable in a constant | |||
18620 | // expression (among other cases). | |||
18621 | bool TryInstantiating = | |||
18622 | TSK == TSK_ImplicitInstantiation || | |||
18623 | (TSK == TSK_ExplicitInstantiationDeclaration && UsableInConstantExpr); | |||
18624 | ||||
18625 | if (TryInstantiating) { | |||
18626 | SourceLocation PointOfInstantiation = | |||
18627 | MSI ? MSI->getPointOfInstantiation() : Var->getPointOfInstantiation(); | |||
18628 | bool FirstInstantiation = PointOfInstantiation.isInvalid(); | |||
18629 | if (FirstInstantiation) { | |||
18630 | PointOfInstantiation = Loc; | |||
18631 | if (MSI) | |||
18632 | MSI->setPointOfInstantiation(PointOfInstantiation); | |||
18633 | // FIXME: Notify listener. | |||
18634 | else | |||
18635 | Var->setTemplateSpecializationKind(TSK, PointOfInstantiation); | |||
18636 | } | |||
18637 | ||||
18638 | if (UsableInConstantExpr) { | |||
18639 | // Do not defer instantiations of variables that could be used in a | |||
18640 | // constant expression. | |||
18641 | SemaRef.runWithSufficientStackSpace(PointOfInstantiation, [&] { | |||
18642 | SemaRef.InstantiateVariableDefinition(PointOfInstantiation, Var); | |||
18643 | }); | |||
18644 | ||||
18645 | // Re-set the member to trigger a recomputation of the dependence bits | |||
18646 | // for the expression. | |||
18647 | if (auto *DRE = dyn_cast_or_null<DeclRefExpr>(E)) | |||
18648 | DRE->setDecl(DRE->getDecl()); | |||
18649 | else if (auto *ME = dyn_cast_or_null<MemberExpr>(E)) | |||
18650 | ME->setMemberDecl(ME->getMemberDecl()); | |||
18651 | } else if (FirstInstantiation || | |||
18652 | isa<VarTemplateSpecializationDecl>(Var)) { | |||
18653 | // FIXME: For a specialization of a variable template, we don't | |||
18654 | // distinguish between "declaration and type implicitly instantiated" | |||
18655 | // and "implicit instantiation of definition requested", so we have | |||
18656 | // no direct way to avoid enqueueing the pending instantiation | |||
18657 | // multiple times. | |||
18658 | SemaRef.PendingInstantiations | |||
18659 | .push_back(std::make_pair(Var, PointOfInstantiation)); | |||
18660 | } | |||
18661 | } | |||
18662 | } | |||
18663 | ||||
18664 | // C++2a [basic.def.odr]p4: | |||
18665 | // A variable x whose name appears as a potentially-evaluated expression e | |||
18666 | // is odr-used by e unless | |||
18667 | // -- x is a reference that is usable in constant expressions | |||
18668 | // -- x is a variable of non-reference type that is usable in constant | |||
18669 | // expressions and has no mutable subobjects [FIXME], and e is an | |||
18670 | // element of the set of potential results of an expression of | |||
18671 | // non-volatile-qualified non-class type to which the lvalue-to-rvalue | |||
18672 | // conversion is applied | |||
18673 | // -- x is a variable of non-reference type, and e is an element of the set | |||
18674 | // of potential results of a discarded-value expression to which the | |||
18675 | // lvalue-to-rvalue conversion is not applied [FIXME] | |||
18676 | // | |||
18677 | // We check the first part of the second bullet here, and | |||
18678 | // Sema::CheckLValueToRValueConversionOperand deals with the second part. | |||
18679 | // FIXME: To get the third bullet right, we need to delay this even for | |||
18680 | // variables that are not usable in constant expressions. | |||
18681 | ||||
18682 | // If we already know this isn't an odr-use, there's nothing more to do. | |||
18683 | if (DeclRefExpr *DRE = dyn_cast_or_null<DeclRefExpr>(E)) | |||
18684 | if (DRE->isNonOdrUse()) | |||
18685 | return; | |||
18686 | if (MemberExpr *ME = dyn_cast_or_null<MemberExpr>(E)) | |||
18687 | if (ME->isNonOdrUse()) | |||
18688 | return; | |||
18689 | ||||
18690 | switch (OdrUse) { | |||
18691 | case OdrUseContext::None: | |||
18692 | assert((!E || isa<FunctionParmPackExpr>(E)) &&(static_cast <bool> ((!E || isa<FunctionParmPackExpr >(E)) && "missing non-odr-use marking for unevaluated decl ref" ) ? void (0) : __assert_fail ("(!E || isa<FunctionParmPackExpr>(E)) && \"missing non-odr-use marking for unevaluated decl ref\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18693, __extension__ __PRETTY_FUNCTION__)) | |||
18693 | "missing non-odr-use marking for unevaluated decl ref")(static_cast <bool> ((!E || isa<FunctionParmPackExpr >(E)) && "missing non-odr-use marking for unevaluated decl ref" ) ? void (0) : __assert_fail ("(!E || isa<FunctionParmPackExpr>(E)) && \"missing non-odr-use marking for unevaluated decl ref\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18693, __extension__ __PRETTY_FUNCTION__)); | |||
18694 | break; | |||
18695 | ||||
18696 | case OdrUseContext::FormallyOdrUsed: | |||
18697 | // FIXME: Ignoring formal odr-uses results in incorrect lambda capture | |||
18698 | // behavior. | |||
18699 | break; | |||
18700 | ||||
18701 | case OdrUseContext::Used: | |||
18702 | // If we might later find that this expression isn't actually an odr-use, | |||
18703 | // delay the marking. | |||
18704 | if (E && Var->isUsableInConstantExpressions(SemaRef.Context)) | |||
18705 | SemaRef.MaybeODRUseExprs.insert(E); | |||
18706 | else | |||
18707 | MarkVarDeclODRUsed(Var, Loc, SemaRef); | |||
18708 | break; | |||
18709 | ||||
18710 | case OdrUseContext::Dependent: | |||
18711 | // If this is a dependent context, we don't need to mark variables as | |||
18712 | // odr-used, but we may still need to track them for lambda capture. | |||
18713 | // FIXME: Do we also need to do this inside dependent typeid expressions | |||
18714 | // (which are modeled as unevaluated at this point)? | |||
18715 | const bool RefersToEnclosingScope = | |||
18716 | (SemaRef.CurContext != Var->getDeclContext() && | |||
18717 | Var->getDeclContext()->isFunctionOrMethod() && Var->hasLocalStorage()); | |||
18718 | if (RefersToEnclosingScope) { | |||
18719 | LambdaScopeInfo *const LSI = | |||
18720 | SemaRef.getCurLambda(/*IgnoreNonLambdaCapturingScope=*/true); | |||
18721 | if (LSI && (!LSI->CallOperator || | |||
18722 | !LSI->CallOperator->Encloses(Var->getDeclContext()))) { | |||
18723 | // If a variable could potentially be odr-used, defer marking it so | |||
18724 | // until we finish analyzing the full expression for any | |||
18725 | // lvalue-to-rvalue | |||
18726 | // or discarded value conversions that would obviate odr-use. | |||
18727 | // Add it to the list of potential captures that will be analyzed | |||
18728 | // later (ActOnFinishFullExpr) for eventual capture and odr-use marking | |||
18729 | // unless the variable is a reference that was initialized by a constant | |||
18730 | // expression (this will never need to be captured or odr-used). | |||
18731 | // | |||
18732 | // FIXME: We can simplify this a lot after implementing P0588R1. | |||
18733 | assert(E && "Capture variable should be used in an expression.")(static_cast <bool> (E && "Capture variable should be used in an expression." ) ? void (0) : __assert_fail ("E && \"Capture variable should be used in an expression.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 18733, __extension__ __PRETTY_FUNCTION__)); | |||
18734 | if (!Var->getType()->isReferenceType() || | |||
18735 | !Var->isUsableInConstantExpressions(SemaRef.Context)) | |||
18736 | LSI->addPotentialCapture(E->IgnoreParens()); | |||
18737 | } | |||
18738 | } | |||
18739 | break; | |||
18740 | } | |||
18741 | } | |||
18742 | ||||
18743 | /// Mark a variable referenced, and check whether it is odr-used | |||
18744 | /// (C++ [basic.def.odr]p2, C99 6.9p3). Note that this should not be | |||
18745 | /// used directly for normal expressions referring to VarDecl. | |||
18746 | void Sema::MarkVariableReferenced(SourceLocation Loc, VarDecl *Var) { | |||
18747 | DoMarkVarDeclReferenced(*this, Loc, Var, nullptr, RefsMinusAssignments); | |||
18748 | } | |||
18749 | ||||
18750 | static void | |||
18751 | MarkExprReferenced(Sema &SemaRef, SourceLocation Loc, Decl *D, Expr *E, | |||
18752 | bool MightBeOdrUse, | |||
18753 | llvm::DenseMap<const VarDecl *, int> &RefsMinusAssignments) { | |||
18754 | if (SemaRef.isInOpenMPDeclareTargetContext()) | |||
18755 | SemaRef.checkDeclIsAllowedInOpenMPTarget(E, D); | |||
18756 | ||||
18757 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) { | |||
18758 | DoMarkVarDeclReferenced(SemaRef, Loc, Var, E, RefsMinusAssignments); | |||
18759 | return; | |||
18760 | } | |||
18761 | ||||
18762 | SemaRef.MarkAnyDeclReferenced(Loc, D, MightBeOdrUse); | |||
18763 | ||||
18764 | // If this is a call to a method via a cast, also mark the method in the | |||
18765 | // derived class used in case codegen can devirtualize the call. | |||
18766 | const MemberExpr *ME = dyn_cast<MemberExpr>(E); | |||
18767 | if (!ME) | |||
18768 | return; | |||
18769 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ME->getMemberDecl()); | |||
18770 | if (!MD) | |||
18771 | return; | |||
18772 | // Only attempt to devirtualize if this is truly a virtual call. | |||
18773 | bool IsVirtualCall = MD->isVirtual() && | |||
18774 | ME->performsVirtualDispatch(SemaRef.getLangOpts()); | |||
18775 | if (!IsVirtualCall) | |||
18776 | return; | |||
18777 | ||||
18778 | // If it's possible to devirtualize the call, mark the called function | |||
18779 | // referenced. | |||
18780 | CXXMethodDecl *DM = MD->getDevirtualizedMethod( | |||
18781 | ME->getBase(), SemaRef.getLangOpts().AppleKext); | |||
18782 | if (DM) | |||
18783 | SemaRef.MarkAnyDeclReferenced(Loc, DM, MightBeOdrUse); | |||
18784 | } | |||
18785 | ||||
18786 | /// Perform reference-marking and odr-use handling for a DeclRefExpr. | |||
18787 | /// | |||
18788 | /// Note, this may change the dependence of the DeclRefExpr, and so needs to be | |||
18789 | /// handled with care if the DeclRefExpr is not newly-created. | |||
18790 | void Sema::MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base) { | |||
18791 | // TODO: update this with DR# once a defect report is filed. | |||
18792 | // C++11 defect. The address of a pure member should not be an ODR use, even | |||
18793 | // if it's a qualified reference. | |||
18794 | bool OdrUse = true; | |||
18795 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(E->getDecl())) | |||
18796 | if (Method->isVirtual() && | |||
18797 | !Method->getDevirtualizedMethod(Base, getLangOpts().AppleKext)) | |||
18798 | OdrUse = false; | |||
18799 | ||||
18800 | if (auto *FD = dyn_cast<FunctionDecl>(E->getDecl())) | |||
18801 | if (!isUnevaluatedContext() && !isConstantEvaluated() && | |||
18802 | FD->isConsteval() && !RebuildingImmediateInvocation) | |||
18803 | ExprEvalContexts.back().ReferenceToConsteval.insert(E); | |||
18804 | MarkExprReferenced(*this, E->getLocation(), E->getDecl(), E, OdrUse, | |||
18805 | RefsMinusAssignments); | |||
18806 | } | |||
18807 | ||||
18808 | /// Perform reference-marking and odr-use handling for a MemberExpr. | |||
18809 | void Sema::MarkMemberReferenced(MemberExpr *E) { | |||
18810 | // C++11 [basic.def.odr]p2: | |||
18811 | // A non-overloaded function whose name appears as a potentially-evaluated | |||
18812 | // expression or a member of a set of candidate functions, if selected by | |||
18813 | // overload resolution when referred to from a potentially-evaluated | |||
18814 | // expression, is odr-used, unless it is a pure virtual function and its | |||
18815 | // name is not explicitly qualified. | |||
18816 | bool MightBeOdrUse = true; | |||
18817 | if (E->performsVirtualDispatch(getLangOpts())) { | |||
18818 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(E->getMemberDecl())) | |||
18819 | if (Method->isPure()) | |||
18820 | MightBeOdrUse = false; | |||
18821 | } | |||
18822 | SourceLocation Loc = | |||
18823 | E->getMemberLoc().isValid() ? E->getMemberLoc() : E->getBeginLoc(); | |||
18824 | MarkExprReferenced(*this, Loc, E->getMemberDecl(), E, MightBeOdrUse, | |||
18825 | RefsMinusAssignments); | |||
18826 | } | |||
18827 | ||||
18828 | /// Perform reference-marking and odr-use handling for a FunctionParmPackExpr. | |||
18829 | void Sema::MarkFunctionParmPackReferenced(FunctionParmPackExpr *E) { | |||
18830 | for (VarDecl *VD : *E) | |||
18831 | MarkExprReferenced(*this, E->getParameterPackLocation(), VD, E, true, | |||
18832 | RefsMinusAssignments); | |||
18833 | } | |||
18834 | ||||
18835 | /// Perform marking for a reference to an arbitrary declaration. It | |||
18836 | /// marks the declaration referenced, and performs odr-use checking for | |||
18837 | /// functions and variables. This method should not be used when building a | |||
18838 | /// normal expression which refers to a variable. | |||
18839 | void Sema::MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, | |||
18840 | bool MightBeOdrUse) { | |||
18841 | if (MightBeOdrUse) { | |||
18842 | if (auto *VD = dyn_cast<VarDecl>(D)) { | |||
18843 | MarkVariableReferenced(Loc, VD); | |||
18844 | return; | |||
18845 | } | |||
18846 | } | |||
18847 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
18848 | MarkFunctionReferenced(Loc, FD, MightBeOdrUse); | |||
18849 | return; | |||
18850 | } | |||
18851 | D->setReferenced(); | |||
18852 | } | |||
18853 | ||||
18854 | namespace { | |||
18855 | // Mark all of the declarations used by a type as referenced. | |||
18856 | // FIXME: Not fully implemented yet! We need to have a better understanding | |||
18857 | // of when we're entering a context we should not recurse into. | |||
18858 | // FIXME: This is and EvaluatedExprMarker are more-or-less equivalent to | |||
18859 | // TreeTransforms rebuilding the type in a new context. Rather than | |||
18860 | // duplicating the TreeTransform logic, we should consider reusing it here. | |||
18861 | // Currently that causes problems when rebuilding LambdaExprs. | |||
18862 | class MarkReferencedDecls : public RecursiveASTVisitor<MarkReferencedDecls> { | |||
18863 | Sema &S; | |||
18864 | SourceLocation Loc; | |||
18865 | ||||
18866 | public: | |||
18867 | typedef RecursiveASTVisitor<MarkReferencedDecls> Inherited; | |||
18868 | ||||
18869 | MarkReferencedDecls(Sema &S, SourceLocation Loc) : S(S), Loc(Loc) { } | |||
18870 | ||||
18871 | bool TraverseTemplateArgument(const TemplateArgument &Arg); | |||
18872 | }; | |||
18873 | } | |||
18874 | ||||
18875 | bool MarkReferencedDecls::TraverseTemplateArgument( | |||
18876 | const TemplateArgument &Arg) { | |||
18877 | { | |||
18878 | // A non-type template argument is a constant-evaluated context. | |||
18879 | EnterExpressionEvaluationContext Evaluated( | |||
18880 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
18881 | if (Arg.getKind() == TemplateArgument::Declaration) { | |||
18882 | if (Decl *D = Arg.getAsDecl()) | |||
18883 | S.MarkAnyDeclReferenced(Loc, D, true); | |||
18884 | } else if (Arg.getKind() == TemplateArgument::Expression) { | |||
18885 | S.MarkDeclarationsReferencedInExpr(Arg.getAsExpr(), false); | |||
18886 | } | |||
18887 | } | |||
18888 | ||||
18889 | return Inherited::TraverseTemplateArgument(Arg); | |||
18890 | } | |||
18891 | ||||
18892 | void Sema::MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T) { | |||
18893 | MarkReferencedDecls Marker(*this, Loc); | |||
18894 | Marker.TraverseType(T); | |||
18895 | } | |||
18896 | ||||
18897 | namespace { | |||
18898 | /// Helper class that marks all of the declarations referenced by | |||
18899 | /// potentially-evaluated subexpressions as "referenced". | |||
18900 | class EvaluatedExprMarker : public UsedDeclVisitor<EvaluatedExprMarker> { | |||
18901 | public: | |||
18902 | typedef UsedDeclVisitor<EvaluatedExprMarker> Inherited; | |||
18903 | bool SkipLocalVariables; | |||
18904 | ||||
18905 | EvaluatedExprMarker(Sema &S, bool SkipLocalVariables) | |||
18906 | : Inherited(S), SkipLocalVariables(SkipLocalVariables) {} | |||
18907 | ||||
18908 | void visitUsedDecl(SourceLocation Loc, Decl *D) { | |||
18909 | S.MarkFunctionReferenced(Loc, cast<FunctionDecl>(D)); | |||
18910 | } | |||
18911 | ||||
18912 | void VisitDeclRefExpr(DeclRefExpr *E) { | |||
18913 | // If we were asked not to visit local variables, don't. | |||
18914 | if (SkipLocalVariables) { | |||
18915 | if (VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) | |||
18916 | if (VD->hasLocalStorage()) | |||
18917 | return; | |||
18918 | } | |||
18919 | ||||
18920 | // FIXME: This can trigger the instantiation of the initializer of a | |||
18921 | // variable, which can cause the expression to become value-dependent | |||
18922 | // or error-dependent. Do we need to propagate the new dependence bits? | |||
18923 | S.MarkDeclRefReferenced(E); | |||
18924 | } | |||
18925 | ||||
18926 | void VisitMemberExpr(MemberExpr *E) { | |||
18927 | S.MarkMemberReferenced(E); | |||
18928 | Visit(E->getBase()); | |||
18929 | } | |||
18930 | }; | |||
18931 | } // namespace | |||
18932 | ||||
18933 | /// Mark any declarations that appear within this expression or any | |||
18934 | /// potentially-evaluated subexpressions as "referenced". | |||
18935 | /// | |||
18936 | /// \param SkipLocalVariables If true, don't mark local variables as | |||
18937 | /// 'referenced'. | |||
18938 | void Sema::MarkDeclarationsReferencedInExpr(Expr *E, | |||
18939 | bool SkipLocalVariables) { | |||
18940 | EvaluatedExprMarker(*this, SkipLocalVariables).Visit(E); | |||
18941 | } | |||
18942 | ||||
18943 | /// Emit a diagnostic that describes an effect on the run-time behavior | |||
18944 | /// of the program being compiled. | |||
18945 | /// | |||
18946 | /// This routine emits the given diagnostic when the code currently being | |||
18947 | /// type-checked is "potentially evaluated", meaning that there is a | |||
18948 | /// possibility that the code will actually be executable. Code in sizeof() | |||
18949 | /// expressions, code used only during overload resolution, etc., are not | |||
18950 | /// potentially evaluated. This routine will suppress such diagnostics or, | |||
18951 | /// in the absolutely nutty case of potentially potentially evaluated | |||
18952 | /// expressions (C++ typeid), queue the diagnostic to potentially emit it | |||
18953 | /// later. | |||
18954 | /// | |||
18955 | /// This routine should be used for all diagnostics that describe the run-time | |||
18956 | /// behavior of a program, such as passing a non-POD value through an ellipsis. | |||
18957 | /// Failure to do so will likely result in spurious diagnostics or failures | |||
18958 | /// during overload resolution or within sizeof/alignof/typeof/typeid. | |||
18959 | bool Sema::DiagRuntimeBehavior(SourceLocation Loc, ArrayRef<const Stmt*> Stmts, | |||
18960 | const PartialDiagnostic &PD) { | |||
18961 | switch (ExprEvalContexts.back().Context) { | |||
18962 | case ExpressionEvaluationContext::Unevaluated: | |||
18963 | case ExpressionEvaluationContext::UnevaluatedList: | |||
18964 | case ExpressionEvaluationContext::UnevaluatedAbstract: | |||
18965 | case ExpressionEvaluationContext::DiscardedStatement: | |||
18966 | // The argument will never be evaluated, so don't complain. | |||
18967 | break; | |||
18968 | ||||
18969 | case ExpressionEvaluationContext::ConstantEvaluated: | |||
18970 | // Relevant diagnostics should be produced by constant evaluation. | |||
18971 | break; | |||
18972 | ||||
18973 | case ExpressionEvaluationContext::PotentiallyEvaluated: | |||
18974 | case ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
18975 | if (!Stmts.empty() && getCurFunctionOrMethodDecl()) { | |||
18976 | FunctionScopes.back()->PossiblyUnreachableDiags. | |||
18977 | push_back(sema::PossiblyUnreachableDiag(PD, Loc, Stmts)); | |||
18978 | return true; | |||
18979 | } | |||
18980 | ||||
18981 | // The initializer of a constexpr variable or of the first declaration of a | |||
18982 | // static data member is not syntactically a constant evaluated constant, | |||
18983 | // but nonetheless is always required to be a constant expression, so we | |||
18984 | // can skip diagnosing. | |||
18985 | // FIXME: Using the mangling context here is a hack. | |||
18986 | if (auto *VD = dyn_cast_or_null<VarDecl>( | |||
18987 | ExprEvalContexts.back().ManglingContextDecl)) { | |||
18988 | if (VD->isConstexpr() || | |||
18989 | (VD->isStaticDataMember() && VD->isFirstDecl() && !VD->isInline())) | |||
18990 | break; | |||
18991 | // FIXME: For any other kind of variable, we should build a CFG for its | |||
18992 | // initializer and check whether the context in question is reachable. | |||
18993 | } | |||
18994 | ||||
18995 | Diag(Loc, PD); | |||
18996 | return true; | |||
18997 | } | |||
18998 | ||||
18999 | return false; | |||
19000 | } | |||
19001 | ||||
19002 | bool Sema::DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, | |||
19003 | const PartialDiagnostic &PD) { | |||
19004 | return DiagRuntimeBehavior( | |||
19005 | Loc, Statement ? llvm::makeArrayRef(Statement) : llvm::None, PD); | |||
19006 | } | |||
19007 | ||||
19008 | bool Sema::CheckCallReturnType(QualType ReturnType, SourceLocation Loc, | |||
19009 | CallExpr *CE, FunctionDecl *FD) { | |||
19010 | if (ReturnType->isVoidType() || !ReturnType->isIncompleteType()) | |||
19011 | return false; | |||
19012 | ||||
19013 | // If we're inside a decltype's expression, don't check for a valid return | |||
19014 | // type or construct temporaries until we know whether this is the last call. | |||
19015 | if (ExprEvalContexts.back().ExprContext == | |||
19016 | ExpressionEvaluationContextRecord::EK_Decltype) { | |||
19017 | ExprEvalContexts.back().DelayedDecltypeCalls.push_back(CE); | |||
19018 | return false; | |||
19019 | } | |||
19020 | ||||
19021 | class CallReturnIncompleteDiagnoser : public TypeDiagnoser { | |||
19022 | FunctionDecl *FD; | |||
19023 | CallExpr *CE; | |||
19024 | ||||
19025 | public: | |||
19026 | CallReturnIncompleteDiagnoser(FunctionDecl *FD, CallExpr *CE) | |||
19027 | : FD(FD), CE(CE) { } | |||
19028 | ||||
19029 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { | |||
19030 | if (!FD) { | |||
19031 | S.Diag(Loc, diag::err_call_incomplete_return) | |||
19032 | << T << CE->getSourceRange(); | |||
19033 | return; | |||
19034 | } | |||
19035 | ||||
19036 | S.Diag(Loc, diag::err_call_function_incomplete_return) | |||
19037 | << CE->getSourceRange() << FD << T; | |||
19038 | S.Diag(FD->getLocation(), diag::note_entity_declared_at) | |||
19039 | << FD->getDeclName(); | |||
19040 | } | |||
19041 | } Diagnoser(FD, CE); | |||
19042 | ||||
19043 | if (RequireCompleteType(Loc, ReturnType, Diagnoser)) | |||
19044 | return true; | |||
19045 | ||||
19046 | return false; | |||
19047 | } | |||
19048 | ||||
19049 | // Diagnose the s/=/==/ and s/\|=/!=/ typos. Note that adding parentheses | |||
19050 | // will prevent this condition from triggering, which is what we want. | |||
19051 | void Sema::DiagnoseAssignmentAsCondition(Expr *E) { | |||
19052 | SourceLocation Loc; | |||
19053 | ||||
19054 | unsigned diagnostic = diag::warn_condition_is_assignment; | |||
19055 | bool IsOrAssign = false; | |||
19056 | ||||
19057 | if (BinaryOperator *Op = dyn_cast<BinaryOperator>(E)) { | |||
19058 | if (Op->getOpcode() != BO_Assign && Op->getOpcode() != BO_OrAssign) | |||
19059 | return; | |||
19060 | ||||
19061 | IsOrAssign = Op->getOpcode() == BO_OrAssign; | |||
19062 | ||||
19063 | // Greylist some idioms by putting them into a warning subcategory. | |||
19064 | if (ObjCMessageExpr *ME | |||
19065 | = dyn_cast<ObjCMessageExpr>(Op->getRHS()->IgnoreParenCasts())) { | |||
19066 | Selector Sel = ME->getSelector(); | |||
19067 | ||||
19068 | // self = [<foo> init...] | |||
19069 | if (isSelfExpr(Op->getLHS()) && ME->getMethodFamily() == OMF_init) | |||
19070 | diagnostic = diag::warn_condition_is_idiomatic_assignment; | |||
19071 | ||||
19072 | // <foo> = [<bar> nextObject] | |||
19073 | else if (Sel.isUnarySelector() && Sel.getNameForSlot(0) == "nextObject") | |||
19074 | diagnostic = diag::warn_condition_is_idiomatic_assignment; | |||
19075 | } | |||
19076 | ||||
19077 | Loc = Op->getOperatorLoc(); | |||
19078 | } else if (CXXOperatorCallExpr *Op = dyn_cast<CXXOperatorCallExpr>(E)) { | |||
19079 | if (Op->getOperator() != OO_Equal && Op->getOperator() != OO_PipeEqual) | |||
19080 | return; | |||
19081 | ||||
19082 | IsOrAssign = Op->getOperator() == OO_PipeEqual; | |||
19083 | Loc = Op->getOperatorLoc(); | |||
19084 | } else if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) | |||
19085 | return DiagnoseAssignmentAsCondition(POE->getSyntacticForm()); | |||
19086 | else { | |||
19087 | // Not an assignment. | |||
19088 | return; | |||
19089 | } | |||
19090 | ||||
19091 | Diag(Loc, diagnostic) << E->getSourceRange(); | |||
19092 | ||||
19093 | SourceLocation Open = E->getBeginLoc(); | |||
19094 | SourceLocation Close = getLocForEndOfToken(E->getSourceRange().getEnd()); | |||
19095 | Diag(Loc, diag::note_condition_assign_silence) | |||
19096 | << FixItHint::CreateInsertion(Open, "(") | |||
19097 | << FixItHint::CreateInsertion(Close, ")"); | |||
19098 | ||||
19099 | if (IsOrAssign) | |||
19100 | Diag(Loc, diag::note_condition_or_assign_to_comparison) | |||
19101 | << FixItHint::CreateReplacement(Loc, "!="); | |||
19102 | else | |||
19103 | Diag(Loc, diag::note_condition_assign_to_comparison) | |||
19104 | << FixItHint::CreateReplacement(Loc, "=="); | |||
19105 | } | |||
19106 | ||||
19107 | /// Redundant parentheses over an equality comparison can indicate | |||
19108 | /// that the user intended an assignment used as condition. | |||
19109 | void Sema::DiagnoseEqualityWithExtraParens(ParenExpr *ParenE) { | |||
19110 | // Don't warn if the parens came from a macro. | |||
19111 | SourceLocation parenLoc = ParenE->getBeginLoc(); | |||
19112 | if (parenLoc.isInvalid() || parenLoc.isMacroID()) | |||
19113 | return; | |||
19114 | // Don't warn for dependent expressions. | |||
19115 | if (ParenE->isTypeDependent()) | |||
19116 | return; | |||
19117 | ||||
19118 | Expr *E = ParenE->IgnoreParens(); | |||
19119 | ||||
19120 | if (BinaryOperator *opE = dyn_cast<BinaryOperator>(E)) | |||
19121 | if (opE->getOpcode() == BO_EQ && | |||
19122 | opE->getLHS()->IgnoreParenImpCasts()->isModifiableLvalue(Context) | |||
19123 | == Expr::MLV_Valid) { | |||
19124 | SourceLocation Loc = opE->getOperatorLoc(); | |||
19125 | ||||
19126 | Diag(Loc, diag::warn_equality_with_extra_parens) << E->getSourceRange(); | |||
19127 | SourceRange ParenERange = ParenE->getSourceRange(); | |||
19128 | Diag(Loc, diag::note_equality_comparison_silence) | |||
19129 | << FixItHint::CreateRemoval(ParenERange.getBegin()) | |||
19130 | << FixItHint::CreateRemoval(ParenERange.getEnd()); | |||
19131 | Diag(Loc, diag::note_equality_comparison_to_assign) | |||
19132 | << FixItHint::CreateReplacement(Loc, "="); | |||
19133 | } | |||
19134 | } | |||
19135 | ||||
19136 | ExprResult Sema::CheckBooleanCondition(SourceLocation Loc, Expr *E, | |||
19137 | bool IsConstexpr) { | |||
19138 | DiagnoseAssignmentAsCondition(E); | |||
19139 | if (ParenExpr *parenE = dyn_cast<ParenExpr>(E)) | |||
19140 | DiagnoseEqualityWithExtraParens(parenE); | |||
19141 | ||||
19142 | ExprResult result = CheckPlaceholderExpr(E); | |||
19143 | if (result.isInvalid()) return ExprError(); | |||
19144 | E = result.get(); | |||
19145 | ||||
19146 | if (!E->isTypeDependent()) { | |||
19147 | if (getLangOpts().CPlusPlus) | |||
19148 | return CheckCXXBooleanCondition(E, IsConstexpr); // C++ 6.4p4 | |||
19149 | ||||
19150 | ExprResult ERes = DefaultFunctionArrayLvalueConversion(E); | |||
19151 | if (ERes.isInvalid()) | |||
19152 | return ExprError(); | |||
19153 | E = ERes.get(); | |||
19154 | ||||
19155 | QualType T = E->getType(); | |||
19156 | if (!T->isScalarType()) { // C99 6.8.4.1p1 | |||
19157 | Diag(Loc, diag::err_typecheck_statement_requires_scalar) | |||
19158 | << T << E->getSourceRange(); | |||
19159 | return ExprError(); | |||
19160 | } | |||
19161 | CheckBoolLikeConversion(E, Loc); | |||
19162 | } | |||
19163 | ||||
19164 | return E; | |||
19165 | } | |||
19166 | ||||
19167 | Sema::ConditionResult Sema::ActOnCondition(Scope *S, SourceLocation Loc, | |||
19168 | Expr *SubExpr, ConditionKind CK) { | |||
19169 | // Empty conditions are valid in for-statements. | |||
19170 | if (!SubExpr) | |||
19171 | return ConditionResult(); | |||
19172 | ||||
19173 | ExprResult Cond; | |||
19174 | switch (CK) { | |||
19175 | case ConditionKind::Boolean: | |||
19176 | Cond = CheckBooleanCondition(Loc, SubExpr); | |||
19177 | break; | |||
19178 | ||||
19179 | case ConditionKind::ConstexprIf: | |||
19180 | Cond = CheckBooleanCondition(Loc, SubExpr, true); | |||
19181 | break; | |||
19182 | ||||
19183 | case ConditionKind::Switch: | |||
19184 | Cond = CheckSwitchCondition(Loc, SubExpr); | |||
19185 | break; | |||
19186 | } | |||
19187 | if (Cond.isInvalid()) { | |||
19188 | Cond = CreateRecoveryExpr(SubExpr->getBeginLoc(), SubExpr->getEndLoc(), | |||
19189 | {SubExpr}); | |||
19190 | if (!Cond.get()) | |||
19191 | return ConditionError(); | |||
19192 | } | |||
19193 | // FIXME: FullExprArg doesn't have an invalid bit, so check nullness instead. | |||
19194 | FullExprArg FullExpr = MakeFullExpr(Cond.get(), Loc); | |||
19195 | if (!FullExpr.get()) | |||
19196 | return ConditionError(); | |||
19197 | ||||
19198 | return ConditionResult(*this, nullptr, FullExpr, | |||
19199 | CK == ConditionKind::ConstexprIf); | |||
19200 | } | |||
19201 | ||||
19202 | namespace { | |||
19203 | /// A visitor for rebuilding a call to an __unknown_any expression | |||
19204 | /// to have an appropriate type. | |||
19205 | struct RebuildUnknownAnyFunction | |||
19206 | : StmtVisitor<RebuildUnknownAnyFunction, ExprResult> { | |||
19207 | ||||
19208 | Sema &S; | |||
19209 | ||||
19210 | RebuildUnknownAnyFunction(Sema &S) : S(S) {} | |||
19211 | ||||
19212 | ExprResult VisitStmt(Stmt *S) { | |||
19213 | llvm_unreachable("unexpected statement!")::llvm::llvm_unreachable_internal("unexpected statement!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19213); | |||
19214 | } | |||
19215 | ||||
19216 | ExprResult VisitExpr(Expr *E) { | |||
19217 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_call) | |||
19218 | << E->getSourceRange(); | |||
19219 | return ExprError(); | |||
19220 | } | |||
19221 | ||||
19222 | /// Rebuild an expression which simply semantically wraps another | |||
19223 | /// expression which it shares the type and value kind of. | |||
19224 | template <class T> ExprResult rebuildSugarExpr(T *E) { | |||
19225 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
19226 | if (SubResult.isInvalid()) return ExprError(); | |||
19227 | ||||
19228 | Expr *SubExpr = SubResult.get(); | |||
19229 | E->setSubExpr(SubExpr); | |||
19230 | E->setType(SubExpr->getType()); | |||
19231 | E->setValueKind(SubExpr->getValueKind()); | |||
19232 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19232, __extension__ __PRETTY_FUNCTION__)); | |||
19233 | return E; | |||
19234 | } | |||
19235 | ||||
19236 | ExprResult VisitParenExpr(ParenExpr *E) { | |||
19237 | return rebuildSugarExpr(E); | |||
19238 | } | |||
19239 | ||||
19240 | ExprResult VisitUnaryExtension(UnaryOperator *E) { | |||
19241 | return rebuildSugarExpr(E); | |||
19242 | } | |||
19243 | ||||
19244 | ExprResult VisitUnaryAddrOf(UnaryOperator *E) { | |||
19245 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
19246 | if (SubResult.isInvalid()) return ExprError(); | |||
19247 | ||||
19248 | Expr *SubExpr = SubResult.get(); | |||
19249 | E->setSubExpr(SubExpr); | |||
19250 | E->setType(S.Context.getPointerType(SubExpr->getType())); | |||
19251 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19251, __extension__ __PRETTY_FUNCTION__)); | |||
19252 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19252, __extension__ __PRETTY_FUNCTION__)); | |||
19253 | return E; | |||
19254 | } | |||
19255 | ||||
19256 | ExprResult resolveDecl(Expr *E, ValueDecl *VD) { | |||
19257 | if (!isa<FunctionDecl>(VD)) return VisitExpr(E); | |||
19258 | ||||
19259 | E->setType(VD->getType()); | |||
19260 | ||||
19261 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19261, __extension__ __PRETTY_FUNCTION__)); | |||
19262 | if (S.getLangOpts().CPlusPlus && | |||
19263 | !(isa<CXXMethodDecl>(VD) && | |||
19264 | cast<CXXMethodDecl>(VD)->isInstance())) | |||
19265 | E->setValueKind(VK_LValue); | |||
19266 | ||||
19267 | return E; | |||
19268 | } | |||
19269 | ||||
19270 | ExprResult VisitMemberExpr(MemberExpr *E) { | |||
19271 | return resolveDecl(E, E->getMemberDecl()); | |||
19272 | } | |||
19273 | ||||
19274 | ExprResult VisitDeclRefExpr(DeclRefExpr *E) { | |||
19275 | return resolveDecl(E, E->getDecl()); | |||
19276 | } | |||
19277 | }; | |||
19278 | } | |||
19279 | ||||
19280 | /// Given a function expression of unknown-any type, try to rebuild it | |||
19281 | /// to have a function type. | |||
19282 | static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *FunctionExpr) { | |||
19283 | ExprResult Result = RebuildUnknownAnyFunction(S).Visit(FunctionExpr); | |||
19284 | if (Result.isInvalid()) return ExprError(); | |||
19285 | return S.DefaultFunctionArrayConversion(Result.get()); | |||
19286 | } | |||
19287 | ||||
19288 | namespace { | |||
19289 | /// A visitor for rebuilding an expression of type __unknown_anytype | |||
19290 | /// into one which resolves the type directly on the referring | |||
19291 | /// expression. Strict preservation of the original source | |||
19292 | /// structure is not a goal. | |||
19293 | struct RebuildUnknownAnyExpr | |||
19294 | : StmtVisitor<RebuildUnknownAnyExpr, ExprResult> { | |||
19295 | ||||
19296 | Sema &S; | |||
19297 | ||||
19298 | /// The current destination type. | |||
19299 | QualType DestType; | |||
19300 | ||||
19301 | RebuildUnknownAnyExpr(Sema &S, QualType CastType) | |||
19302 | : S(S), DestType(CastType) {} | |||
19303 | ||||
19304 | ExprResult VisitStmt(Stmt *S) { | |||
19305 | llvm_unreachable("unexpected statement!")::llvm::llvm_unreachable_internal("unexpected statement!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19305); | |||
19306 | } | |||
19307 | ||||
19308 | ExprResult VisitExpr(Expr *E) { | |||
19309 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr) | |||
19310 | << E->getSourceRange(); | |||
19311 | return ExprError(); | |||
19312 | } | |||
19313 | ||||
19314 | ExprResult VisitCallExpr(CallExpr *E); | |||
19315 | ExprResult VisitObjCMessageExpr(ObjCMessageExpr *E); | |||
19316 | ||||
19317 | /// Rebuild an expression which simply semantically wraps another | |||
19318 | /// expression which it shares the type and value kind of. | |||
19319 | template <class T> ExprResult rebuildSugarExpr(T *E) { | |||
19320 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
19321 | if (SubResult.isInvalid()) return ExprError(); | |||
19322 | Expr *SubExpr = SubResult.get(); | |||
19323 | E->setSubExpr(SubExpr); | |||
19324 | E->setType(SubExpr->getType()); | |||
19325 | E->setValueKind(SubExpr->getValueKind()); | |||
19326 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19326, __extension__ __PRETTY_FUNCTION__)); | |||
19327 | return E; | |||
19328 | } | |||
19329 | ||||
19330 | ExprResult VisitParenExpr(ParenExpr *E) { | |||
19331 | return rebuildSugarExpr(E); | |||
19332 | } | |||
19333 | ||||
19334 | ExprResult VisitUnaryExtension(UnaryOperator *E) { | |||
19335 | return rebuildSugarExpr(E); | |||
19336 | } | |||
19337 | ||||
19338 | ExprResult VisitUnaryAddrOf(UnaryOperator *E) { | |||
19339 | const PointerType *Ptr = DestType->getAs<PointerType>(); | |||
19340 | if (!Ptr) { | |||
19341 | S.Diag(E->getOperatorLoc(), diag::err_unknown_any_addrof) | |||
19342 | << E->getSourceRange(); | |||
19343 | return ExprError(); | |||
19344 | } | |||
19345 | ||||
19346 | if (isa<CallExpr>(E->getSubExpr())) { | |||
19347 | S.Diag(E->getOperatorLoc(), diag::err_unknown_any_addrof_call) | |||
19348 | << E->getSourceRange(); | |||
19349 | return ExprError(); | |||
19350 | } | |||
19351 | ||||
19352 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19352, __extension__ __PRETTY_FUNCTION__)); | |||
19353 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19353, __extension__ __PRETTY_FUNCTION__)); | |||
19354 | E->setType(DestType); | |||
19355 | ||||
19356 | // Build the sub-expression as if it were an object of the pointee type. | |||
19357 | DestType = Ptr->getPointeeType(); | |||
19358 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
19359 | if (SubResult.isInvalid()) return ExprError(); | |||
19360 | E->setSubExpr(SubResult.get()); | |||
19361 | return E; | |||
19362 | } | |||
19363 | ||||
19364 | ExprResult VisitImplicitCastExpr(ImplicitCastExpr *E); | |||
19365 | ||||
19366 | ExprResult resolveDecl(Expr *E, ValueDecl *VD); | |||
19367 | ||||
19368 | ExprResult VisitMemberExpr(MemberExpr *E) { | |||
19369 | return resolveDecl(E, E->getMemberDecl()); | |||
19370 | } | |||
19371 | ||||
19372 | ExprResult VisitDeclRefExpr(DeclRefExpr *E) { | |||
19373 | return resolveDecl(E, E->getDecl()); | |||
19374 | } | |||
19375 | }; | |||
19376 | } | |||
19377 | ||||
19378 | /// Rebuilds a call expression which yielded __unknown_anytype. | |||
19379 | ExprResult RebuildUnknownAnyExpr::VisitCallExpr(CallExpr *E) { | |||
19380 | Expr *CalleeExpr = E->getCallee(); | |||
19381 | ||||
19382 | enum FnKind { | |||
19383 | FK_MemberFunction, | |||
19384 | FK_FunctionPointer, | |||
19385 | FK_BlockPointer | |||
19386 | }; | |||
19387 | ||||
19388 | FnKind Kind; | |||
19389 | QualType CalleeType = CalleeExpr->getType(); | |||
19390 | if (CalleeType == S.Context.BoundMemberTy) { | |||
19391 | assert(isa<CXXMemberCallExpr>(E) || isa<CXXOperatorCallExpr>(E))(static_cast <bool> (isa<CXXMemberCallExpr>(E) || isa<CXXOperatorCallExpr>(E)) ? void (0) : __assert_fail ("isa<CXXMemberCallExpr>(E) || isa<CXXOperatorCallExpr>(E)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19391, __extension__ __PRETTY_FUNCTION__)); | |||
19392 | Kind = FK_MemberFunction; | |||
19393 | CalleeType = Expr::findBoundMemberType(CalleeExpr); | |||
19394 | } else if (const PointerType *Ptr = CalleeType->getAs<PointerType>()) { | |||
19395 | CalleeType = Ptr->getPointeeType(); | |||
19396 | Kind = FK_FunctionPointer; | |||
19397 | } else { | |||
19398 | CalleeType = CalleeType->castAs<BlockPointerType>()->getPointeeType(); | |||
19399 | Kind = FK_BlockPointer; | |||
19400 | } | |||
19401 | const FunctionType *FnType = CalleeType->castAs<FunctionType>(); | |||
19402 | ||||
19403 | // Verify that this is a legal result type of a function. | |||
19404 | if (DestType->isArrayType() || DestType->isFunctionType()) { | |||
19405 | unsigned diagID = diag::err_func_returning_array_function; | |||
19406 | if (Kind == FK_BlockPointer) | |||
19407 | diagID = diag::err_block_returning_array_function; | |||
19408 | ||||
19409 | S.Diag(E->getExprLoc(), diagID) | |||
19410 | << DestType->isFunctionType() << DestType; | |||
19411 | return ExprError(); | |||
19412 | } | |||
19413 | ||||
19414 | // Otherwise, go ahead and set DestType as the call's result. | |||
19415 | E->setType(DestType.getNonLValueExprType(S.Context)); | |||
19416 | E->setValueKind(Expr::getValueKindForType(DestType)); | |||
19417 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19417, __extension__ __PRETTY_FUNCTION__)); | |||
19418 | ||||
19419 | // Rebuild the function type, replacing the result type with DestType. | |||
19420 | const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FnType); | |||
19421 | if (Proto) { | |||
19422 | // __unknown_anytype(...) is a special case used by the debugger when | |||
19423 | // it has no idea what a function's signature is. | |||
19424 | // | |||
19425 | // We want to build this call essentially under the K&R | |||
19426 | // unprototyped rules, but making a FunctionNoProtoType in C++ | |||
19427 | // would foul up all sorts of assumptions. However, we cannot | |||
19428 | // simply pass all arguments as variadic arguments, nor can we | |||
19429 | // portably just call the function under a non-variadic type; see | |||
19430 | // the comment on IR-gen's TargetInfo::isNoProtoCallVariadic. | |||
19431 | // However, it turns out that in practice it is generally safe to | |||
19432 | // call a function declared as "A foo(B,C,D);" under the prototype | |||
19433 | // "A foo(B,C,D,...);". The only known exception is with the | |||
19434 | // Windows ABI, where any variadic function is implicitly cdecl | |||
19435 | // regardless of its normal CC. Therefore we change the parameter | |||
19436 | // types to match the types of the arguments. | |||
19437 | // | |||
19438 | // This is a hack, but it is far superior to moving the | |||
19439 | // corresponding target-specific code from IR-gen to Sema/AST. | |||
19440 | ||||
19441 | ArrayRef<QualType> ParamTypes = Proto->getParamTypes(); | |||
19442 | SmallVector<QualType, 8> ArgTypes; | |||
19443 | if (ParamTypes.empty() && Proto->isVariadic()) { // the special case | |||
19444 | ArgTypes.reserve(E->getNumArgs()); | |||
19445 | for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) { | |||
19446 | ArgTypes.push_back(S.Context.getReferenceQualifiedType(E->getArg(i))); | |||
19447 | } | |||
19448 | ParamTypes = ArgTypes; | |||
19449 | } | |||
19450 | DestType = S.Context.getFunctionType(DestType, ParamTypes, | |||
19451 | Proto->getExtProtoInfo()); | |||
19452 | } else { | |||
19453 | DestType = S.Context.getFunctionNoProtoType(DestType, | |||
19454 | FnType->getExtInfo()); | |||
19455 | } | |||
19456 | ||||
19457 | // Rebuild the appropriate pointer-to-function type. | |||
19458 | switch (Kind) { | |||
19459 | case FK_MemberFunction: | |||
19460 | // Nothing to do. | |||
19461 | break; | |||
19462 | ||||
19463 | case FK_FunctionPointer: | |||
19464 | DestType = S.Context.getPointerType(DestType); | |||
19465 | break; | |||
19466 | ||||
19467 | case FK_BlockPointer: | |||
19468 | DestType = S.Context.getBlockPointerType(DestType); | |||
19469 | break; | |||
19470 | } | |||
19471 | ||||
19472 | // Finally, we can recurse. | |||
19473 | ExprResult CalleeResult = Visit(CalleeExpr); | |||
19474 | if (!CalleeResult.isUsable()) return ExprError(); | |||
19475 | E->setCallee(CalleeResult.get()); | |||
19476 | ||||
19477 | // Bind a temporary if necessary. | |||
19478 | return S.MaybeBindToTemporary(E); | |||
19479 | } | |||
19480 | ||||
19481 | ExprResult RebuildUnknownAnyExpr::VisitObjCMessageExpr(ObjCMessageExpr *E) { | |||
19482 | // Verify that this is a legal result type of a call. | |||
19483 | if (DestType->isArrayType() || DestType->isFunctionType()) { | |||
19484 | S.Diag(E->getExprLoc(), diag::err_func_returning_array_function) | |||
19485 | << DestType->isFunctionType() << DestType; | |||
19486 | return ExprError(); | |||
19487 | } | |||
19488 | ||||
19489 | // Rewrite the method result type if available. | |||
19490 | if (ObjCMethodDecl *Method = E->getMethodDecl()) { | |||
19491 | assert(Method->getReturnType() == S.Context.UnknownAnyTy)(static_cast <bool> (Method->getReturnType() == S.Context .UnknownAnyTy) ? void (0) : __assert_fail ("Method->getReturnType() == S.Context.UnknownAnyTy" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19491, __extension__ __PRETTY_FUNCTION__)); | |||
19492 | Method->setReturnType(DestType); | |||
19493 | } | |||
19494 | ||||
19495 | // Change the type of the message. | |||
19496 | E->setType(DestType.getNonReferenceType()); | |||
19497 | E->setValueKind(Expr::getValueKindForType(DestType)); | |||
19498 | ||||
19499 | return S.MaybeBindToTemporary(E); | |||
19500 | } | |||
19501 | ||||
19502 | ExprResult RebuildUnknownAnyExpr::VisitImplicitCastExpr(ImplicitCastExpr *E) { | |||
19503 | // The only case we should ever see here is a function-to-pointer decay. | |||
19504 | if (E->getCastKind() == CK_FunctionToPointerDecay) { | |||
19505 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19505, __extension__ __PRETTY_FUNCTION__)); | |||
19506 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19506, __extension__ __PRETTY_FUNCTION__)); | |||
19507 | ||||
19508 | E->setType(DestType); | |||
19509 | ||||
19510 | // Rebuild the sub-expression as the pointee (function) type. | |||
19511 | DestType = DestType->castAs<PointerType>()->getPointeeType(); | |||
19512 | ||||
19513 | ExprResult Result = Visit(E->getSubExpr()); | |||
19514 | if (!Result.isUsable()) return ExprError(); | |||
19515 | ||||
19516 | E->setSubExpr(Result.get()); | |||
19517 | return E; | |||
19518 | } else if (E->getCastKind() == CK_LValueToRValue) { | |||
19519 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19519, __extension__ __PRETTY_FUNCTION__)); | |||
19520 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19520, __extension__ __PRETTY_FUNCTION__)); | |||
19521 | ||||
19522 | assert(isa<BlockPointerType>(E->getType()))(static_cast <bool> (isa<BlockPointerType>(E-> getType())) ? void (0) : __assert_fail ("isa<BlockPointerType>(E->getType())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19522, __extension__ __PRETTY_FUNCTION__)); | |||
19523 | ||||
19524 | E->setType(DestType); | |||
19525 | ||||
19526 | // The sub-expression has to be a lvalue reference, so rebuild it as such. | |||
19527 | DestType = S.Context.getLValueReferenceType(DestType); | |||
19528 | ||||
19529 | ExprResult Result = Visit(E->getSubExpr()); | |||
19530 | if (!Result.isUsable()) return ExprError(); | |||
19531 | ||||
19532 | E->setSubExpr(Result.get()); | |||
19533 | return E; | |||
19534 | } else { | |||
19535 | llvm_unreachable("Unhandled cast type!")::llvm::llvm_unreachable_internal("Unhandled cast type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19535); | |||
19536 | } | |||
19537 | } | |||
19538 | ||||
19539 | ExprResult RebuildUnknownAnyExpr::resolveDecl(Expr *E, ValueDecl *VD) { | |||
19540 | ExprValueKind ValueKind = VK_LValue; | |||
19541 | QualType Type = DestType; | |||
19542 | ||||
19543 | // We know how to make this work for certain kinds of decls: | |||
19544 | ||||
19545 | // - functions | |||
19546 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(VD)) { | |||
19547 | if (const PointerType *Ptr = Type->getAs<PointerType>()) { | |||
19548 | DestType = Ptr->getPointeeType(); | |||
19549 | ExprResult Result = resolveDecl(E, VD); | |||
19550 | if (Result.isInvalid()) return ExprError(); | |||
19551 | return S.ImpCastExprToType(Result.get(), Type, CK_FunctionToPointerDecay, | |||
19552 | VK_PRValue); | |||
19553 | } | |||
19554 | ||||
19555 | if (!Type->isFunctionType()) { | |||
19556 | S.Diag(E->getExprLoc(), diag::err_unknown_any_function) | |||
19557 | << VD << E->getSourceRange(); | |||
19558 | return ExprError(); | |||
19559 | } | |||
19560 | if (const FunctionProtoType *FT = Type->getAs<FunctionProtoType>()) { | |||
19561 | // We must match the FunctionDecl's type to the hack introduced in | |||
19562 | // RebuildUnknownAnyExpr::VisitCallExpr to vararg functions of unknown | |||
19563 | // type. See the lengthy commentary in that routine. | |||
19564 | QualType FDT = FD->getType(); | |||
19565 | const FunctionType *FnType = FDT->castAs<FunctionType>(); | |||
19566 | const FunctionProtoType *Proto = dyn_cast_or_null<FunctionProtoType>(FnType); | |||
19567 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
19568 | if (DRE && Proto && Proto->getParamTypes().empty() && Proto->isVariadic()) { | |||
19569 | SourceLocation Loc = FD->getLocation(); | |||
19570 | FunctionDecl *NewFD = FunctionDecl::Create( | |||
19571 | S.Context, FD->getDeclContext(), Loc, Loc, | |||
19572 | FD->getNameInfo().getName(), DestType, FD->getTypeSourceInfo(), | |||
19573 | SC_None, S.getCurFPFeatures().isFPConstrained(), | |||
19574 | false /*isInlineSpecified*/, FD->hasPrototype(), | |||
19575 | /*ConstexprKind*/ ConstexprSpecKind::Unspecified); | |||
19576 | ||||
19577 | if (FD->getQualifier()) | |||
19578 | NewFD->setQualifierInfo(FD->getQualifierLoc()); | |||
19579 | ||||
19580 | SmallVector<ParmVarDecl*, 16> Params; | |||
19581 | for (const auto &AI : FT->param_types()) { | |||
19582 | ParmVarDecl *Param = | |||
19583 | S.BuildParmVarDeclForTypedef(FD, Loc, AI); | |||
19584 | Param->setScopeInfo(0, Params.size()); | |||
19585 | Params.push_back(Param); | |||
19586 | } | |||
19587 | NewFD->setParams(Params); | |||
19588 | DRE->setDecl(NewFD); | |||
19589 | VD = DRE->getDecl(); | |||
19590 | } | |||
19591 | } | |||
19592 | ||||
19593 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
19594 | if (MD->isInstance()) { | |||
19595 | ValueKind = VK_PRValue; | |||
19596 | Type = S.Context.BoundMemberTy; | |||
19597 | } | |||
19598 | ||||
19599 | // Function references aren't l-values in C. | |||
19600 | if (!S.getLangOpts().CPlusPlus) | |||
19601 | ValueKind = VK_PRValue; | |||
19602 | ||||
19603 | // - variables | |||
19604 | } else if (isa<VarDecl>(VD)) { | |||
19605 | if (const ReferenceType *RefTy = Type->getAs<ReferenceType>()) { | |||
19606 | Type = RefTy->getPointeeType(); | |||
19607 | } else if (Type->isFunctionType()) { | |||
19608 | S.Diag(E->getExprLoc(), diag::err_unknown_any_var_function_type) | |||
19609 | << VD << E->getSourceRange(); | |||
19610 | return ExprError(); | |||
19611 | } | |||
19612 | ||||
19613 | // - nothing else | |||
19614 | } else { | |||
19615 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_decl) | |||
19616 | << VD << E->getSourceRange(); | |||
19617 | return ExprError(); | |||
19618 | } | |||
19619 | ||||
19620 | // Modifying the declaration like this is friendly to IR-gen but | |||
19621 | // also really dangerous. | |||
19622 | VD->setType(DestType); | |||
19623 | E->setType(Type); | |||
19624 | E->setValueKind(ValueKind); | |||
19625 | return E; | |||
19626 | } | |||
19627 | ||||
19628 | /// Check a cast of an unknown-any type. We intentionally only | |||
19629 | /// trigger this for C-style casts. | |||
19630 | ExprResult Sema::checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, | |||
19631 | Expr *CastExpr, CastKind &CastKind, | |||
19632 | ExprValueKind &VK, CXXCastPath &Path) { | |||
19633 | // The type we're casting to must be either void or complete. | |||
19634 | if (!CastType->isVoidType() && | |||
19635 | RequireCompleteType(TypeRange.getBegin(), CastType, | |||
19636 | diag::err_typecheck_cast_to_incomplete)) | |||
19637 | return ExprError(); | |||
19638 | ||||
19639 | // Rewrite the casted expression from scratch. | |||
19640 | ExprResult result = RebuildUnknownAnyExpr(*this, CastType).Visit(CastExpr); | |||
19641 | if (!result.isUsable()) return ExprError(); | |||
19642 | ||||
19643 | CastExpr = result.get(); | |||
19644 | VK = CastExpr->getValueKind(); | |||
19645 | CastKind = CK_NoOp; | |||
19646 | ||||
19647 | return CastExpr; | |||
19648 | } | |||
19649 | ||||
19650 | ExprResult Sema::forceUnknownAnyToType(Expr *E, QualType ToType) { | |||
19651 | return RebuildUnknownAnyExpr(*this, ToType).Visit(E); | |||
19652 | } | |||
19653 | ||||
19654 | ExprResult Sema::checkUnknownAnyArg(SourceLocation callLoc, | |||
19655 | Expr *arg, QualType ¶mType) { | |||
19656 | // If the syntactic form of the argument is not an explicit cast of | |||
19657 | // any sort, just do default argument promotion. | |||
19658 | ExplicitCastExpr *castArg = dyn_cast<ExplicitCastExpr>(arg->IgnoreParens()); | |||
19659 | if (!castArg) { | |||
19660 | ExprResult result = DefaultArgumentPromotion(arg); | |||
19661 | if (result.isInvalid()) return ExprError(); | |||
19662 | paramType = result.get()->getType(); | |||
19663 | return result; | |||
19664 | } | |||
19665 | ||||
19666 | // Otherwise, use the type that was written in the explicit cast. | |||
19667 | assert(!arg->hasPlaceholderType())(static_cast <bool> (!arg->hasPlaceholderType()) ? void (0) : __assert_fail ("!arg->hasPlaceholderType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19667, __extension__ __PRETTY_FUNCTION__)); | |||
19668 | paramType = castArg->getTypeAsWritten(); | |||
19669 | ||||
19670 | // Copy-initialize a parameter of that type. | |||
19671 | InitializedEntity entity = | |||
19672 | InitializedEntity::InitializeParameter(Context, paramType, | |||
19673 | /*consumed*/ false); | |||
19674 | return PerformCopyInitialization(entity, callLoc, arg); | |||
19675 | } | |||
19676 | ||||
19677 | static ExprResult diagnoseUnknownAnyExpr(Sema &S, Expr *E) { | |||
19678 | Expr *orig = E; | |||
19679 | unsigned diagID = diag::err_uncasted_use_of_unknown_any; | |||
19680 | while (true) { | |||
19681 | E = E->IgnoreParenImpCasts(); | |||
19682 | if (CallExpr *call = dyn_cast<CallExpr>(E)) { | |||
19683 | E = call->getCallee(); | |||
19684 | diagID = diag::err_uncasted_call_of_unknown_any; | |||
19685 | } else { | |||
19686 | break; | |||
19687 | } | |||
19688 | } | |||
19689 | ||||
19690 | SourceLocation loc; | |||
19691 | NamedDecl *d; | |||
19692 | if (DeclRefExpr *ref = dyn_cast<DeclRefExpr>(E)) { | |||
19693 | loc = ref->getLocation(); | |||
19694 | d = ref->getDecl(); | |||
19695 | } else if (MemberExpr *mem = dyn_cast<MemberExpr>(E)) { | |||
19696 | loc = mem->getMemberLoc(); | |||
19697 | d = mem->getMemberDecl(); | |||
19698 | } else if (ObjCMessageExpr *msg = dyn_cast<ObjCMessageExpr>(E)) { | |||
19699 | diagID = diag::err_uncasted_call_of_unknown_any; | |||
19700 | loc = msg->getSelectorStartLoc(); | |||
19701 | d = msg->getMethodDecl(); | |||
19702 | if (!d) { | |||
19703 | S.Diag(loc, diag::err_uncasted_send_to_unknown_any_method) | |||
19704 | << static_cast<unsigned>(msg->isClassMessage()) << msg->getSelector() | |||
19705 | << orig->getSourceRange(); | |||
19706 | return ExprError(); | |||
19707 | } | |||
19708 | } else { | |||
19709 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr) | |||
19710 | << E->getSourceRange(); | |||
19711 | return ExprError(); | |||
19712 | } | |||
19713 | ||||
19714 | S.Diag(loc, diagID) << d << orig->getSourceRange(); | |||
19715 | ||||
19716 | // Never recoverable. | |||
19717 | return ExprError(); | |||
19718 | } | |||
19719 | ||||
19720 | /// Check for operands with placeholder types and complain if found. | |||
19721 | /// Returns ExprError() if there was an error and no recovery was possible. | |||
19722 | ExprResult Sema::CheckPlaceholderExpr(Expr *E) { | |||
19723 | if (!Context.isDependenceAllowed()) { | |||
19724 | // C cannot handle TypoExpr nodes on either side of a binop because it | |||
19725 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
19726 | // been dealt with before checking the operands. | |||
19727 | ExprResult Result = CorrectDelayedTyposInExpr(E); | |||
19728 | if (!Result.isUsable()) return ExprError(); | |||
19729 | E = Result.get(); | |||
19730 | } | |||
19731 | ||||
19732 | const BuiltinType *placeholderType = E->getType()->getAsPlaceholderType(); | |||
19733 | if (!placeholderType) return E; | |||
19734 | ||||
19735 | switch (placeholderType->getKind()) { | |||
19736 | ||||
19737 | // Overloaded expressions. | |||
19738 | case BuiltinType::Overload: { | |||
19739 | // Try to resolve a single function template specialization. | |||
19740 | // This is obligatory. | |||
19741 | ExprResult Result = E; | |||
19742 | if (ResolveAndFixSingleFunctionTemplateSpecialization(Result, false)) | |||
19743 | return Result; | |||
19744 | ||||
19745 | // No guarantees that ResolveAndFixSingleFunctionTemplateSpecialization | |||
19746 | // leaves Result unchanged on failure. | |||
19747 | Result = E; | |||
19748 | if (resolveAndFixAddressOfSingleOverloadCandidate(Result)) | |||
19749 | return Result; | |||
19750 | ||||
19751 | // If that failed, try to recover with a call. | |||
19752 | tryToRecoverWithCall(Result, PDiag(diag::err_ovl_unresolvable), | |||
19753 | /*complain*/ true); | |||
19754 | return Result; | |||
19755 | } | |||
19756 | ||||
19757 | // Bound member functions. | |||
19758 | case BuiltinType::BoundMember: { | |||
19759 | ExprResult result = E; | |||
19760 | const Expr *BME = E->IgnoreParens(); | |||
19761 | PartialDiagnostic PD = PDiag(diag::err_bound_member_function); | |||
19762 | // Try to give a nicer diagnostic if it is a bound member that we recognize. | |||
19763 | if (isa<CXXPseudoDestructorExpr>(BME)) { | |||
19764 | PD = PDiag(diag::err_dtor_expr_without_call) << /*pseudo-destructor*/ 1; | |||
19765 | } else if (const auto *ME = dyn_cast<MemberExpr>(BME)) { | |||
19766 | if (ME->getMemberNameInfo().getName().getNameKind() == | |||
19767 | DeclarationName::CXXDestructorName) | |||
19768 | PD = PDiag(diag::err_dtor_expr_without_call) << /*destructor*/ 0; | |||
19769 | } | |||
19770 | tryToRecoverWithCall(result, PD, | |||
19771 | /*complain*/ true); | |||
19772 | return result; | |||
19773 | } | |||
19774 | ||||
19775 | // ARC unbridged casts. | |||
19776 | case BuiltinType::ARCUnbridgedCast: { | |||
19777 | Expr *realCast = stripARCUnbridgedCast(E); | |||
19778 | diagnoseARCUnbridgedCast(realCast); | |||
19779 | return realCast; | |||
19780 | } | |||
19781 | ||||
19782 | // Expressions of unknown type. | |||
19783 | case BuiltinType::UnknownAny: | |||
19784 | return diagnoseUnknownAnyExpr(*this, E); | |||
19785 | ||||
19786 | // Pseudo-objects. | |||
19787 | case BuiltinType::PseudoObject: | |||
19788 | return checkPseudoObjectRValue(E); | |||
19789 | ||||
19790 | case BuiltinType::BuiltinFn: { | |||
19791 | // Accept __noop without parens by implicitly converting it to a call expr. | |||
19792 | auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()); | |||
19793 | if (DRE) { | |||
19794 | auto *FD = cast<FunctionDecl>(DRE->getDecl()); | |||
19795 | if (FD->getBuiltinID() == Builtin::BI__noop) { | |||
19796 | E = ImpCastExprToType(E, Context.getPointerType(FD->getType()), | |||
19797 | CK_BuiltinFnToFnPtr) | |||
19798 | .get(); | |||
19799 | return CallExpr::Create(Context, E, /*Args=*/{}, Context.IntTy, | |||
19800 | VK_PRValue, SourceLocation(), | |||
19801 | FPOptionsOverride()); | |||
19802 | } | |||
19803 | } | |||
19804 | ||||
19805 | Diag(E->getBeginLoc(), diag::err_builtin_fn_use); | |||
19806 | return ExprError(); | |||
19807 | } | |||
19808 | ||||
19809 | case BuiltinType::IncompleteMatrixIdx: | |||
19810 | Diag(cast<MatrixSubscriptExpr>(E->IgnoreParens()) | |||
19811 | ->getRowIdx() | |||
19812 | ->getBeginLoc(), | |||
19813 | diag::err_matrix_incomplete_index); | |||
19814 | return ExprError(); | |||
19815 | ||||
19816 | // Expressions of unknown type. | |||
19817 | case BuiltinType::OMPArraySection: | |||
19818 | Diag(E->getBeginLoc(), diag::err_omp_array_section_use); | |||
19819 | return ExprError(); | |||
19820 | ||||
19821 | // Expressions of unknown type. | |||
19822 | case BuiltinType::OMPArrayShaping: | |||
19823 | return ExprError(Diag(E->getBeginLoc(), diag::err_omp_array_shaping_use)); | |||
19824 | ||||
19825 | case BuiltinType::OMPIterator: | |||
19826 | return ExprError(Diag(E->getBeginLoc(), diag::err_omp_iterator_use)); | |||
19827 | ||||
19828 | // Everything else should be impossible. | |||
19829 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
19830 | case BuiltinType::Id: | |||
19831 | #include "clang/Basic/OpenCLImageTypes.def" | |||
19832 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
19833 | case BuiltinType::Id: | |||
19834 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
19835 | #define SVE_TYPE(Name, Id, SingletonId) \ | |||
19836 | case BuiltinType::Id: | |||
19837 | #include "clang/Basic/AArch64SVEACLETypes.def" | |||
19838 | #define PPC_VECTOR_TYPE(Name, Id, Size) \ | |||
19839 | case BuiltinType::Id: | |||
19840 | #include "clang/Basic/PPCTypes.def" | |||
19841 | #define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
19842 | #include "clang/Basic/RISCVVTypes.def" | |||
19843 | #define BUILTIN_TYPE(Id, SingletonId) case BuiltinType::Id: | |||
19844 | #define PLACEHOLDER_TYPE(Id, SingletonId) | |||
19845 | #include "clang/AST/BuiltinTypes.def" | |||
19846 | break; | |||
19847 | } | |||
19848 | ||||
19849 | llvm_unreachable("invalid placeholder type!")::llvm::llvm_unreachable_internal("invalid placeholder type!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19849); | |||
19850 | } | |||
19851 | ||||
19852 | bool Sema::CheckCaseExpression(Expr *E) { | |||
19853 | if (E->isTypeDependent()) | |||
19854 | return true; | |||
19855 | if (E->isValueDependent() || E->isIntegerConstantExpr(Context)) | |||
19856 | return E->getType()->isIntegralOrEnumerationType(); | |||
19857 | return false; | |||
19858 | } | |||
19859 | ||||
19860 | /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. | |||
19861 | ExprResult | |||
19862 | Sema::ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) { | |||
19863 | assert((Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) &&(static_cast <bool> ((Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) && "Unknown Objective-C Boolean value!" ) ? void (0) : __assert_fail ("(Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) && \"Unknown Objective-C Boolean value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19864, __extension__ __PRETTY_FUNCTION__)) | |||
19864 | "Unknown Objective-C Boolean value!")(static_cast <bool> ((Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) && "Unknown Objective-C Boolean value!" ) ? void (0) : __assert_fail ("(Kind == tok::kw___objc_yes || Kind == tok::kw___objc_no) && \"Unknown Objective-C Boolean value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaExpr.cpp" , 19864, __extension__ __PRETTY_FUNCTION__)); | |||
19865 | QualType BoolT = Context.ObjCBuiltinBoolTy; | |||
19866 | if (!Context.getBOOLDecl()) { | |||
19867 | LookupResult Result(*this, &Context.Idents.get("BOOL"), OpLoc, | |||
19868 | Sema::LookupOrdinaryName); | |||
19869 | if (LookupName(Result, getCurScope()) && Result.isSingleResult()) { | |||
19870 | NamedDecl *ND = Result.getFoundDecl(); | |||
19871 | if (TypedefDecl *TD = dyn_cast<TypedefDecl>(ND)) | |||
19872 | Context.setBOOLDecl(TD); | |||
19873 | } | |||
19874 | } | |||
19875 | if (Context.getBOOLDecl()) | |||
19876 | BoolT = Context.getBOOLType(); | |||
19877 | return new (Context) | |||
19878 | ObjCBoolLiteralExpr(Kind == tok::kw___objc_yes, BoolT, OpLoc); | |||
19879 | } | |||
19880 | ||||
19881 | ExprResult Sema::ActOnObjCAvailabilityCheckExpr( | |||
19882 | llvm::ArrayRef<AvailabilitySpec> AvailSpecs, SourceLocation AtLoc, | |||
19883 | SourceLocation RParen) { | |||
19884 | auto FindSpecVersion = [&](StringRef Platform) -> Optional<VersionTuple> { | |||
19885 | auto Spec = llvm::find_if(AvailSpecs, [&](const AvailabilitySpec &Spec) { | |||
19886 | return Spec.getPlatform() == Platform; | |||
19887 | }); | |||
19888 | // Transcribe the "ios" availability check to "maccatalyst" when compiling | |||
19889 | // for "maccatalyst" if "maccatalyst" is not specified. | |||
19890 | if (Spec == AvailSpecs.end() && Platform == "maccatalyst") { | |||
19891 | Spec = llvm::find_if(AvailSpecs, [&](const AvailabilitySpec &Spec) { | |||
19892 | return Spec.getPlatform() == "ios"; | |||
19893 | }); | |||
19894 | } | |||
19895 | if (Spec == AvailSpecs.end()) | |||
19896 | return None; | |||
19897 | return Spec->getVersion(); | |||
19898 | }; | |||
19899 | ||||
19900 | VersionTuple Version; | |||
19901 | if (auto MaybeVersion = | |||
19902 | FindSpecVersion(Context.getTargetInfo().getPlatformName())) | |||
19903 | Version = *MaybeVersion; | |||
19904 | ||||
19905 | // The use of `@available` in the enclosing context should be analyzed to | |||
19906 | // warn when it's used inappropriately (i.e. not if(@available)). | |||
19907 | if (FunctionScopeInfo *Context = getCurFunctionAvailabilityContext()) | |||
19908 | Context->HasPotentialAvailabilityViolations = true; | |||
19909 | ||||
19910 | return new (Context) | |||
19911 | ObjCAvailabilityCheckExpr(Version, AtLoc, RParen, Context.BoolTy); | |||
19912 | } | |||
19913 | ||||
19914 | ExprResult Sema::CreateRecoveryExpr(SourceLocation Begin, SourceLocation End, | |||
19915 | ArrayRef<Expr *> SubExprs, QualType T) { | |||
19916 | if (!Context.getLangOpts().RecoveryAST) | |||
19917 | return ExprError(); | |||
19918 | ||||
19919 | if (isSFINAEContext()) | |||
19920 | return ExprError(); | |||
19921 | ||||
19922 | if (T.isNull() || T->isUndeducedType() || | |||
19923 | !Context.getLangOpts().RecoveryASTType) | |||
19924 | // We don't know the concrete type, fallback to dependent type. | |||
19925 | T = Context.DependentTy; | |||
19926 | ||||
19927 | return RecoveryExpr::Create(Context, T, Begin, End, SubExprs); | |||
19928 | } |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | /// \file |
10 | /// C Language Family Type Representation |
11 | /// |
12 | /// This file defines the clang::Type interface and subclasses, used to |
13 | /// represent types for languages in the C family. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef LLVM_CLANG_AST_TYPE_H |
18 | #define LLVM_CLANG_AST_TYPE_H |
19 | |
20 | #include "clang/AST/DependenceFlags.h" |
21 | #include "clang/AST/NestedNameSpecifier.h" |
22 | #include "clang/AST/TemplateName.h" |
23 | #include "clang/Basic/AddressSpaces.h" |
24 | #include "clang/Basic/AttrKinds.h" |
25 | #include "clang/Basic/Diagnostic.h" |
26 | #include "clang/Basic/ExceptionSpecificationType.h" |
27 | #include "clang/Basic/LLVM.h" |
28 | #include "clang/Basic/Linkage.h" |
29 | #include "clang/Basic/PartialDiagnostic.h" |
30 | #include "clang/Basic/SourceLocation.h" |
31 | #include "clang/Basic/Specifiers.h" |
32 | #include "clang/Basic/Visibility.h" |
33 | #include "llvm/ADT/APInt.h" |
34 | #include "llvm/ADT/APSInt.h" |
35 | #include "llvm/ADT/ArrayRef.h" |
36 | #include "llvm/ADT/FoldingSet.h" |
37 | #include "llvm/ADT/None.h" |
38 | #include "llvm/ADT/Optional.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/StringRef.h" |
42 | #include "llvm/ADT/Twine.h" |
43 | #include "llvm/ADT/iterator_range.h" |
44 | #include "llvm/Support/Casting.h" |
45 | #include "llvm/Support/Compiler.h" |
46 | #include "llvm/Support/ErrorHandling.h" |
47 | #include "llvm/Support/PointerLikeTypeTraits.h" |
48 | #include "llvm/Support/TrailingObjects.h" |
49 | #include "llvm/Support/type_traits.h" |
50 | #include <cassert> |
51 | #include <cstddef> |
52 | #include <cstdint> |
53 | #include <cstring> |
54 | #include <string> |
55 | #include <type_traits> |
56 | #include <utility> |
57 | |
58 | namespace clang { |
59 | |
60 | class ExtQuals; |
61 | class QualType; |
62 | class ConceptDecl; |
63 | class TagDecl; |
64 | class TemplateParameterList; |
65 | class Type; |
66 | |
67 | enum { |
68 | TypeAlignmentInBits = 4, |
69 | TypeAlignment = 1 << TypeAlignmentInBits |
70 | }; |
71 | |
72 | namespace serialization { |
73 | template <class T> class AbstractTypeReader; |
74 | template <class T> class AbstractTypeWriter; |
75 | } |
76 | |
77 | } // namespace clang |
78 | |
79 | namespace llvm { |
80 | |
81 | template <typename T> |
82 | struct PointerLikeTypeTraits; |
83 | template<> |
84 | struct PointerLikeTypeTraits< ::clang::Type*> { |
85 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } |
86 | |
87 | static inline ::clang::Type *getFromVoidPointer(void *P) { |
88 | return static_cast< ::clang::Type*>(P); |
89 | } |
90 | |
91 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
92 | }; |
93 | |
94 | template<> |
95 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { |
96 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } |
97 | |
98 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { |
99 | return static_cast< ::clang::ExtQuals*>(P); |
100 | } |
101 | |
102 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
103 | }; |
104 | |
105 | } // namespace llvm |
106 | |
107 | namespace clang { |
108 | |
109 | class ASTContext; |
110 | template <typename> class CanQual; |
111 | class CXXRecordDecl; |
112 | class DeclContext; |
113 | class EnumDecl; |
114 | class Expr; |
115 | class ExtQualsTypeCommonBase; |
116 | class FunctionDecl; |
117 | class IdentifierInfo; |
118 | class NamedDecl; |
119 | class ObjCInterfaceDecl; |
120 | class ObjCProtocolDecl; |
121 | class ObjCTypeParamDecl; |
122 | struct PrintingPolicy; |
123 | class RecordDecl; |
124 | class Stmt; |
125 | class TagDecl; |
126 | class TemplateArgument; |
127 | class TemplateArgumentListInfo; |
128 | class TemplateArgumentLoc; |
129 | class TemplateTypeParmDecl; |
130 | class TypedefNameDecl; |
131 | class UnresolvedUsingTypenameDecl; |
132 | |
133 | using CanQualType = CanQual<Type>; |
134 | |
135 | // Provide forward declarations for all of the *Type classes. |
136 | #define TYPE(Class, Base) class Class##Type; |
137 | #include "clang/AST/TypeNodes.inc" |
138 | |
139 | /// The collection of all-type qualifiers we support. |
140 | /// Clang supports five independent qualifiers: |
141 | /// * C99: const, volatile, and restrict |
142 | /// * MS: __unaligned |
143 | /// * Embedded C (TR18037): address spaces |
144 | /// * Objective C: the GC attributes (none, weak, or strong) |
145 | class Qualifiers { |
146 | public: |
147 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. |
148 | Const = 0x1, |
149 | Restrict = 0x2, |
150 | Volatile = 0x4, |
151 | CVRMask = Const | Volatile | Restrict |
152 | }; |
153 | |
154 | enum GC { |
155 | GCNone = 0, |
156 | Weak, |
157 | Strong |
158 | }; |
159 | |
160 | enum ObjCLifetime { |
161 | /// There is no lifetime qualification on this type. |
162 | OCL_None, |
163 | |
164 | /// This object can be modified without requiring retains or |
165 | /// releases. |
166 | OCL_ExplicitNone, |
167 | |
168 | /// Assigning into this object requires the old value to be |
169 | /// released and the new value to be retained. The timing of the |
170 | /// release of the old value is inexact: it may be moved to |
171 | /// immediately after the last known point where the value is |
172 | /// live. |
173 | OCL_Strong, |
174 | |
175 | /// Reading or writing from this object requires a barrier call. |
176 | OCL_Weak, |
177 | |
178 | /// Assigning into this object requires a lifetime extension. |
179 | OCL_Autoreleasing |
180 | }; |
181 | |
182 | enum { |
183 | /// The maximum supported address space number. |
184 | /// 23 bits should be enough for anyone. |
185 | MaxAddressSpace = 0x7fffffu, |
186 | |
187 | /// The width of the "fast" qualifier mask. |
188 | FastWidth = 3, |
189 | |
190 | /// The fast qualifier mask. |
191 | FastMask = (1 << FastWidth) - 1 |
192 | }; |
193 | |
194 | /// Returns the common set of qualifiers while removing them from |
195 | /// the given sets. |
196 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { |
197 | // If both are only CVR-qualified, bit operations are sufficient. |
198 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { |
199 | Qualifiers Q; |
200 | Q.Mask = L.Mask & R.Mask; |
201 | L.Mask &= ~Q.Mask; |
202 | R.Mask &= ~Q.Mask; |
203 | return Q; |
204 | } |
205 | |
206 | Qualifiers Q; |
207 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); |
208 | Q.addCVRQualifiers(CommonCRV); |
209 | L.removeCVRQualifiers(CommonCRV); |
210 | R.removeCVRQualifiers(CommonCRV); |
211 | |
212 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { |
213 | Q.setObjCGCAttr(L.getObjCGCAttr()); |
214 | L.removeObjCGCAttr(); |
215 | R.removeObjCGCAttr(); |
216 | } |
217 | |
218 | if (L.getObjCLifetime() == R.getObjCLifetime()) { |
219 | Q.setObjCLifetime(L.getObjCLifetime()); |
220 | L.removeObjCLifetime(); |
221 | R.removeObjCLifetime(); |
222 | } |
223 | |
224 | if (L.getAddressSpace() == R.getAddressSpace()) { |
225 | Q.setAddressSpace(L.getAddressSpace()); |
226 | L.removeAddressSpace(); |
227 | R.removeAddressSpace(); |
228 | } |
229 | return Q; |
230 | } |
231 | |
232 | static Qualifiers fromFastMask(unsigned Mask) { |
233 | Qualifiers Qs; |
234 | Qs.addFastQualifiers(Mask); |
235 | return Qs; |
236 | } |
237 | |
238 | static Qualifiers fromCVRMask(unsigned CVR) { |
239 | Qualifiers Qs; |
240 | Qs.addCVRQualifiers(CVR); |
241 | return Qs; |
242 | } |
243 | |
244 | static Qualifiers fromCVRUMask(unsigned CVRU) { |
245 | Qualifiers Qs; |
246 | Qs.addCVRUQualifiers(CVRU); |
247 | return Qs; |
248 | } |
249 | |
250 | // Deserialize qualifiers from an opaque representation. |
251 | static Qualifiers fromOpaqueValue(unsigned opaque) { |
252 | Qualifiers Qs; |
253 | Qs.Mask = opaque; |
254 | return Qs; |
255 | } |
256 | |
257 | // Serialize these qualifiers into an opaque representation. |
258 | unsigned getAsOpaqueValue() const { |
259 | return Mask; |
260 | } |
261 | |
262 | bool hasConst() const { return Mask & Const; } |
263 | bool hasOnlyConst() const { return Mask == Const; } |
264 | void removeConst() { Mask &= ~Const; } |
265 | void addConst() { Mask |= Const; } |
266 | |
267 | bool hasVolatile() const { return Mask & Volatile; } |
268 | bool hasOnlyVolatile() const { return Mask == Volatile; } |
269 | void removeVolatile() { Mask &= ~Volatile; } |
270 | void addVolatile() { Mask |= Volatile; } |
271 | |
272 | bool hasRestrict() const { return Mask & Restrict; } |
273 | bool hasOnlyRestrict() const { return Mask == Restrict; } |
274 | void removeRestrict() { Mask &= ~Restrict; } |
275 | void addRestrict() { Mask |= Restrict; } |
276 | |
277 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } |
278 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } |
279 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } |
280 | |
281 | void setCVRQualifiers(unsigned mask) { |
282 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 282, __extension__ __PRETTY_FUNCTION__)); |
283 | Mask = (Mask & ~CVRMask) | mask; |
284 | } |
285 | void removeCVRQualifiers(unsigned mask) { |
286 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 286, __extension__ __PRETTY_FUNCTION__)); |
287 | Mask &= ~mask; |
288 | } |
289 | void removeCVRQualifiers() { |
290 | removeCVRQualifiers(CVRMask); |
291 | } |
292 | void addCVRQualifiers(unsigned mask) { |
293 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 293, __extension__ __PRETTY_FUNCTION__)); |
294 | Mask |= mask; |
295 | } |
296 | void addCVRUQualifiers(unsigned mask) { |
297 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")(static_cast <bool> (!(mask & ~CVRMask & ~UMask ) && "bitmask contains non-CVRU bits") ? void (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 297, __extension__ __PRETTY_FUNCTION__)); |
298 | Mask |= mask; |
299 | } |
300 | |
301 | bool hasUnaligned() const { return Mask & UMask; } |
302 | void setUnaligned(bool flag) { |
303 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); |
304 | } |
305 | void removeUnaligned() { Mask &= ~UMask; } |
306 | void addUnaligned() { Mask |= UMask; } |
307 | |
308 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } |
309 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } |
310 | void setObjCGCAttr(GC type) { |
311 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); |
312 | } |
313 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } |
314 | void addObjCGCAttr(GC type) { |
315 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 315, __extension__ __PRETTY_FUNCTION__)); |
316 | setObjCGCAttr(type); |
317 | } |
318 | Qualifiers withoutObjCGCAttr() const { |
319 | Qualifiers qs = *this; |
320 | qs.removeObjCGCAttr(); |
321 | return qs; |
322 | } |
323 | Qualifiers withoutObjCLifetime() const { |
324 | Qualifiers qs = *this; |
325 | qs.removeObjCLifetime(); |
326 | return qs; |
327 | } |
328 | Qualifiers withoutAddressSpace() const { |
329 | Qualifiers qs = *this; |
330 | qs.removeAddressSpace(); |
331 | return qs; |
332 | } |
333 | |
334 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } |
335 | ObjCLifetime getObjCLifetime() const { |
336 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); |
337 | } |
338 | void setObjCLifetime(ObjCLifetime type) { |
339 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); |
340 | } |
341 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } |
342 | void addObjCLifetime(ObjCLifetime type) { |
343 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 343, __extension__ __PRETTY_FUNCTION__)); |
344 | assert(!hasObjCLifetime())(static_cast <bool> (!hasObjCLifetime()) ? void (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 344, __extension__ __PRETTY_FUNCTION__)); |
345 | Mask |= (type << LifetimeShift); |
346 | } |
347 | |
348 | /// True if the lifetime is neither None or ExplicitNone. |
349 | bool hasNonTrivialObjCLifetime() const { |
350 | ObjCLifetime lifetime = getObjCLifetime(); |
351 | return (lifetime > OCL_ExplicitNone); |
352 | } |
353 | |
354 | /// True if the lifetime is either strong or weak. |
355 | bool hasStrongOrWeakObjCLifetime() const { |
356 | ObjCLifetime lifetime = getObjCLifetime(); |
357 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); |
358 | } |
359 | |
360 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } |
361 | LangAS getAddressSpace() const { |
362 | return static_cast<LangAS>(Mask >> AddressSpaceShift); |
363 | } |
364 | bool hasTargetSpecificAddressSpace() const { |
365 | return isTargetAddressSpace(getAddressSpace()); |
366 | } |
367 | /// Get the address space attribute value to be printed by diagnostics. |
368 | unsigned getAddressSpaceAttributePrintValue() const { |
369 | auto Addr = getAddressSpace(); |
370 | // This function is not supposed to be used with language specific |
371 | // address spaces. If that happens, the diagnostic message should consider |
372 | // printing the QualType instead of the address space value. |
373 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())(static_cast <bool> (Addr == LangAS::Default || hasTargetSpecificAddressSpace ()) ? void (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 373, __extension__ __PRETTY_FUNCTION__)); |
374 | if (Addr != LangAS::Default) |
375 | return toTargetAddressSpace(Addr); |
376 | // TODO: The diagnostic messages where Addr may be 0 should be fixed |
377 | // since it cannot differentiate the situation where 0 denotes the default |
378 | // address space or user specified __attribute__((address_space(0))). |
379 | return 0; |
380 | } |
381 | void setAddressSpace(LangAS space) { |
382 | assert((unsigned)space <= MaxAddressSpace)(static_cast <bool> ((unsigned)space <= MaxAddressSpace ) ? void (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 382, __extension__ __PRETTY_FUNCTION__)); |
383 | Mask = (Mask & ~AddressSpaceMask) |
384 | | (((uint32_t) space) << AddressSpaceShift); |
385 | } |
386 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } |
387 | void addAddressSpace(LangAS space) { |
388 | assert(space != LangAS::Default)(static_cast <bool> (space != LangAS::Default) ? void ( 0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 388, __extension__ __PRETTY_FUNCTION__)); |
389 | setAddressSpace(space); |
390 | } |
391 | |
392 | // Fast qualifiers are those that can be allocated directly |
393 | // on a QualType object. |
394 | bool hasFastQualifiers() const { return getFastQualifiers(); } |
395 | unsigned getFastQualifiers() const { return Mask & FastMask; } |
396 | void setFastQualifiers(unsigned mask) { |
397 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 397, __extension__ __PRETTY_FUNCTION__)); |
398 | Mask = (Mask & ~FastMask) | mask; |
399 | } |
400 | void removeFastQualifiers(unsigned mask) { |
401 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 401, __extension__ __PRETTY_FUNCTION__)); |
402 | Mask &= ~mask; |
403 | } |
404 | void removeFastQualifiers() { |
405 | removeFastQualifiers(FastMask); |
406 | } |
407 | void addFastQualifiers(unsigned mask) { |
408 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 408, __extension__ __PRETTY_FUNCTION__)); |
409 | Mask |= mask; |
410 | } |
411 | |
412 | /// Return true if the set contains any qualifiers which require an ExtQuals |
413 | /// node to be allocated. |
414 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } |
415 | Qualifiers getNonFastQualifiers() const { |
416 | Qualifiers Quals = *this; |
417 | Quals.setFastQualifiers(0); |
418 | return Quals; |
419 | } |
420 | |
421 | /// Return true if the set contains any qualifiers. |
422 | bool hasQualifiers() const { return Mask; } |
423 | bool empty() const { return !Mask; } |
424 | |
425 | /// Add the qualifiers from the given set to this set. |
426 | void addQualifiers(Qualifiers Q) { |
427 | // If the other set doesn't have any non-boolean qualifiers, just |
428 | // bit-or it in. |
429 | if (!(Q.Mask & ~CVRMask)) |
430 | Mask |= Q.Mask; |
431 | else { |
432 | Mask |= (Q.Mask & CVRMask); |
433 | if (Q.hasAddressSpace()) |
434 | addAddressSpace(Q.getAddressSpace()); |
435 | if (Q.hasObjCGCAttr()) |
436 | addObjCGCAttr(Q.getObjCGCAttr()); |
437 | if (Q.hasObjCLifetime()) |
438 | addObjCLifetime(Q.getObjCLifetime()); |
439 | } |
440 | } |
441 | |
442 | /// Remove the qualifiers from the given set from this set. |
443 | void removeQualifiers(Qualifiers Q) { |
444 | // If the other set doesn't have any non-boolean qualifiers, just |
445 | // bit-and the inverse in. |
446 | if (!(Q.Mask & ~CVRMask)) |
447 | Mask &= ~Q.Mask; |
448 | else { |
449 | Mask &= ~(Q.Mask & CVRMask); |
450 | if (getObjCGCAttr() == Q.getObjCGCAttr()) |
451 | removeObjCGCAttr(); |
452 | if (getObjCLifetime() == Q.getObjCLifetime()) |
453 | removeObjCLifetime(); |
454 | if (getAddressSpace() == Q.getAddressSpace()) |
455 | removeAddressSpace(); |
456 | } |
457 | } |
458 | |
459 | /// Add the qualifiers from the given set to this set, given that |
460 | /// they don't conflict. |
461 | void addConsistentQualifiers(Qualifiers qs) { |
462 | assert(getAddressSpace() == qs.getAddressSpace() ||(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)) |
463 | !hasAddressSpace() || !qs.hasAddressSpace())(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)); |
464 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)) |
465 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)); |
466 | assert(getObjCLifetime() == qs.getObjCLifetime() ||(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)) |
467 | !hasObjCLifetime() || !qs.hasObjCLifetime())(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)); |
468 | Mask |= qs.Mask; |
469 | } |
470 | |
471 | /// Returns true if address space A is equal to or a superset of B. |
472 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of |
473 | /// overlapping address spaces. |
474 | /// CL1.1 or CL1.2: |
475 | /// every address space is a superset of itself. |
476 | /// CL2.0 adds: |
477 | /// __generic is a superset of any address space except for __constant. |
478 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { |
479 | // Address spaces must match exactly. |
480 | return A == B || |
481 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except |
482 | // for __constant can be used as __generic. |
483 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant) || |
484 | // We also define global_device and global_host address spaces, |
485 | // to distinguish global pointers allocated on host from pointers |
486 | // allocated on device, which are a subset of __global. |
487 | (A == LangAS::opencl_global && (B == LangAS::opencl_global_device || |
488 | B == LangAS::opencl_global_host)) || |
489 | (A == LangAS::sycl_global && (B == LangAS::sycl_global_device || |
490 | B == LangAS::sycl_global_host)) || |
491 | // Consider pointer size address spaces to be equivalent to default. |
492 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && |
493 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)) || |
494 | // Default is a superset of SYCL address spaces. |
495 | (A == LangAS::Default && |
496 | (B == LangAS::sycl_private || B == LangAS::sycl_local || |
497 | B == LangAS::sycl_global || B == LangAS::sycl_global_device || |
498 | B == LangAS::sycl_global_host)) || |
499 | // In HIP device compilation, any cuda address space is allowed |
500 | // to implicitly cast into the default address space. |
501 | (A == LangAS::Default && |
502 | (B == LangAS::cuda_constant || B == LangAS::cuda_device || |
503 | B == LangAS::cuda_shared)); |
504 | } |
505 | |
506 | /// Returns true if the address space in these qualifiers is equal to or |
507 | /// a superset of the address space in the argument qualifiers. |
508 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
509 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
510 | } |
511 | |
512 | /// Determines if these qualifiers compatibly include another set. |
513 | /// Generally this answers the question of whether an object with the other |
514 | /// qualifiers can be safely used as an object with these qualifiers. |
515 | bool compatiblyIncludes(Qualifiers other) const { |
516 | return isAddressSpaceSupersetOf(other) && |
517 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
518 | // be changed. |
519 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
520 | !other.hasObjCGCAttr()) && |
521 | // ObjC lifetime qualifiers must match exactly. |
522 | getObjCLifetime() == other.getObjCLifetime() && |
523 | // CVR qualifiers may subset. |
524 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
525 | // U qualifier may superset. |
526 | (!other.hasUnaligned() || hasUnaligned()); |
527 | } |
528 | |
529 | /// Determines if these qualifiers compatibly include another set of |
530 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
531 | /// |
532 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
533 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
534 | /// including set also contains the 'const' qualifier, or both are non-__weak |
535 | /// and one is None (which can only happen in non-ARC modes). |
536 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
537 | if (getObjCLifetime() == other.getObjCLifetime()) |
538 | return true; |
539 | |
540 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
541 | return false; |
542 | |
543 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
544 | return true; |
545 | |
546 | return hasConst(); |
547 | } |
548 | |
549 | /// Determine whether this set of qualifiers is a strict superset of |
550 | /// another set of qualifiers, not considering qualifier compatibility. |
551 | bool isStrictSupersetOf(Qualifiers Other) const; |
552 | |
553 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
554 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
555 | |
556 | explicit operator bool() const { return hasQualifiers(); } |
557 | |
558 | Qualifiers &operator+=(Qualifiers R) { |
559 | addQualifiers(R); |
560 | return *this; |
561 | } |
562 | |
563 | // Union two qualifier sets. If an enumerated qualifier appears |
564 | // in both sets, use the one from the right. |
565 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
566 | L += R; |
567 | return L; |
568 | } |
569 | |
570 | Qualifiers &operator-=(Qualifiers R) { |
571 | removeQualifiers(R); |
572 | return *this; |
573 | } |
574 | |
575 | /// Compute the difference between two qualifier sets. |
576 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
577 | L -= R; |
578 | return L; |
579 | } |
580 | |
581 | std::string getAsString() const; |
582 | std::string getAsString(const PrintingPolicy &Policy) const; |
583 | |
584 | static std::string getAddrSpaceAsString(LangAS AS); |
585 | |
586 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
587 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
588 | bool appendSpaceIfNonEmpty = false) const; |
589 | |
590 | void Profile(llvm::FoldingSetNodeID &ID) const { |
591 | ID.AddInteger(Mask); |
592 | } |
593 | |
594 | private: |
595 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
596 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
597 | uint32_t Mask = 0; |
598 | |
599 | static const uint32_t UMask = 0x8; |
600 | static const uint32_t UShift = 3; |
601 | static const uint32_t GCAttrMask = 0x30; |
602 | static const uint32_t GCAttrShift = 4; |
603 | static const uint32_t LifetimeMask = 0x1C0; |
604 | static const uint32_t LifetimeShift = 6; |
605 | static const uint32_t AddressSpaceMask = |
606 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
607 | static const uint32_t AddressSpaceShift = 9; |
608 | }; |
609 | |
610 | /// A std::pair-like structure for storing a qualified type split |
611 | /// into its local qualifiers and its locally-unqualified type. |
612 | struct SplitQualType { |
613 | /// The locally-unqualified type. |
614 | const Type *Ty = nullptr; |
615 | |
616 | /// The local qualifiers. |
617 | Qualifiers Quals; |
618 | |
619 | SplitQualType() = default; |
620 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
621 | |
622 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
623 | |
624 | // Make std::tie work. |
625 | std::pair<const Type *,Qualifiers> asPair() const { |
626 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
627 | } |
628 | |
629 | friend bool operator==(SplitQualType a, SplitQualType b) { |
630 | return a.Ty == b.Ty && a.Quals == b.Quals; |
631 | } |
632 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
633 | return a.Ty != b.Ty || a.Quals != b.Quals; |
634 | } |
635 | }; |
636 | |
637 | /// The kind of type we are substituting Objective-C type arguments into. |
638 | /// |
639 | /// The kind of substitution affects the replacement of type parameters when |
640 | /// no concrete type information is provided, e.g., when dealing with an |
641 | /// unspecialized type. |
642 | enum class ObjCSubstitutionContext { |
643 | /// An ordinary type. |
644 | Ordinary, |
645 | |
646 | /// The result type of a method or function. |
647 | Result, |
648 | |
649 | /// The parameter type of a method or function. |
650 | Parameter, |
651 | |
652 | /// The type of a property. |
653 | Property, |
654 | |
655 | /// The superclass of a type. |
656 | Superclass, |
657 | }; |
658 | |
659 | /// A (possibly-)qualified type. |
660 | /// |
661 | /// For efficiency, we don't store CV-qualified types as nodes on their |
662 | /// own: instead each reference to a type stores the qualifiers. This |
663 | /// greatly reduces the number of nodes we need to allocate for types (for |
664 | /// example we only need one for 'int', 'const int', 'volatile int', |
665 | /// 'const volatile int', etc). |
666 | /// |
667 | /// As an added efficiency bonus, instead of making this a pair, we |
668 | /// just store the two bits we care about in the low bits of the |
669 | /// pointer. To handle the packing/unpacking, we make QualType be a |
670 | /// simple wrapper class that acts like a smart pointer. A third bit |
671 | /// indicates whether there are extended qualifiers present, in which |
672 | /// case the pointer points to a special structure. |
673 | class QualType { |
674 | friend class QualifierCollector; |
675 | |
676 | // Thankfully, these are efficiently composable. |
677 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
678 | Qualifiers::FastWidth> Value; |
679 | |
680 | const ExtQuals *getExtQualsUnsafe() const { |
681 | return Value.getPointer().get<const ExtQuals*>(); |
682 | } |
683 | |
684 | const Type *getTypePtrUnsafe() const { |
685 | return Value.getPointer().get<const Type*>(); |
686 | } |
687 | |
688 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
689 | assert(!isNull() && "Cannot retrieve a NULL type pointer")(static_cast <bool> (!isNull() && "Cannot retrieve a NULL type pointer" ) ? void (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 689, __extension__ __PRETTY_FUNCTION__)); |
690 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
691 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
692 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
693 | } |
694 | |
695 | public: |
696 | QualType() = default; |
697 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
698 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
699 | |
700 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
701 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
702 | |
703 | /// Retrieves a pointer to the underlying (unqualified) type. |
704 | /// |
705 | /// This function requires that the type not be NULL. If the type might be |
706 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
707 | const Type *getTypePtr() const; |
708 | |
709 | const Type *getTypePtrOrNull() const; |
710 | |
711 | /// Retrieves a pointer to the name of the base type. |
712 | const IdentifierInfo *getBaseTypeIdentifier() const; |
713 | |
714 | /// Divides a QualType into its unqualified type and a set of local |
715 | /// qualifiers. |
716 | SplitQualType split() const; |
717 | |
718 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
719 | |
720 | static QualType getFromOpaquePtr(const void *Ptr) { |
721 | QualType T; |
722 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
723 | return T; |
724 | } |
725 | |
726 | const Type &operator*() const { |
727 | return *getTypePtr(); |
728 | } |
729 | |
730 | const Type *operator->() const { |
731 | return getTypePtr(); |
732 | } |
733 | |
734 | bool isCanonical() const; |
735 | bool isCanonicalAsParam() const; |
736 | |
737 | /// Return true if this QualType doesn't point to a type yet. |
738 | bool isNull() const { |
739 | return Value.getPointer().isNull(); |
740 | } |
741 | |
742 | /// Determine whether this particular QualType instance has the |
743 | /// "const" qualifier set, without looking through typedefs that may have |
744 | /// added "const" at a different level. |
745 | bool isLocalConstQualified() const { |
746 | return (getLocalFastQualifiers() & Qualifiers::Const); |
747 | } |
748 | |
749 | /// Determine whether this type is const-qualified. |
750 | bool isConstQualified() const; |
751 | |
752 | /// Determine whether this particular QualType instance has the |
753 | /// "restrict" qualifier set, without looking through typedefs that may have |
754 | /// added "restrict" at a different level. |
755 | bool isLocalRestrictQualified() const { |
756 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
757 | } |
758 | |
759 | /// Determine whether this type is restrict-qualified. |
760 | bool isRestrictQualified() const; |
761 | |
762 | /// Determine whether this particular QualType instance has the |
763 | /// "volatile" qualifier set, without looking through typedefs that may have |
764 | /// added "volatile" at a different level. |
765 | bool isLocalVolatileQualified() const { |
766 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
767 | } |
768 | |
769 | /// Determine whether this type is volatile-qualified. |
770 | bool isVolatileQualified() const; |
771 | |
772 | /// Determine whether this particular QualType instance has any |
773 | /// qualifiers, without looking through any typedefs that might add |
774 | /// qualifiers at a different level. |
775 | bool hasLocalQualifiers() const { |
776 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
777 | } |
778 | |
779 | /// Determine whether this type has any qualifiers. |
780 | bool hasQualifiers() const; |
781 | |
782 | /// Determine whether this particular QualType instance has any |
783 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
784 | /// instance. |
785 | bool hasLocalNonFastQualifiers() const { |
786 | return Value.getPointer().is<const ExtQuals*>(); |
787 | } |
788 | |
789 | /// Retrieve the set of qualifiers local to this particular QualType |
790 | /// instance, not including any qualifiers acquired through typedefs or |
791 | /// other sugar. |
792 | Qualifiers getLocalQualifiers() const; |
793 | |
794 | /// Retrieve the set of qualifiers applied to this type. |
795 | Qualifiers getQualifiers() const; |
796 | |
797 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
798 | /// local to this particular QualType instance, not including any qualifiers |
799 | /// acquired through typedefs or other sugar. |
800 | unsigned getLocalCVRQualifiers() const { |
801 | return getLocalFastQualifiers(); |
802 | } |
803 | |
804 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
805 | /// applied to this type. |
806 | unsigned getCVRQualifiers() const; |
807 | |
808 | bool isConstant(const ASTContext& Ctx) const { |
809 | return QualType::isConstant(*this, Ctx); |
810 | } |
811 | |
812 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
813 | bool isPODType(const ASTContext &Context) const; |
814 | |
815 | /// Return true if this is a POD type according to the rules of the C++98 |
816 | /// standard, regardless of the current compilation's language. |
817 | bool isCXX98PODType(const ASTContext &Context) const; |
818 | |
819 | /// Return true if this is a POD type according to the more relaxed rules |
820 | /// of the C++11 standard, regardless of the current compilation's language. |
821 | /// (C++0x [basic.types]p9). Note that, unlike |
822 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
823 | bool isCXX11PODType(const ASTContext &Context) const; |
824 | |
825 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
826 | bool isTrivialType(const ASTContext &Context) const; |
827 | |
828 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
829 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
830 | |
831 | |
832 | /// Returns true if it is a class and it might be dynamic. |
833 | bool mayBeDynamicClass() const; |
834 | |
835 | /// Returns true if it is not a class or if the class might not be dynamic. |
836 | bool mayBeNotDynamicClass() const; |
837 | |
838 | // Don't promise in the API that anything besides 'const' can be |
839 | // easily added. |
840 | |
841 | /// Add the `const` type qualifier to this QualType. |
842 | void addConst() { |
843 | addFastQualifiers(Qualifiers::Const); |
844 | } |
845 | QualType withConst() const { |
846 | return withFastQualifiers(Qualifiers::Const); |
847 | } |
848 | |
849 | /// Add the `volatile` type qualifier to this QualType. |
850 | void addVolatile() { |
851 | addFastQualifiers(Qualifiers::Volatile); |
852 | } |
853 | QualType withVolatile() const { |
854 | return withFastQualifiers(Qualifiers::Volatile); |
855 | } |
856 | |
857 | /// Add the `restrict` qualifier to this QualType. |
858 | void addRestrict() { |
859 | addFastQualifiers(Qualifiers::Restrict); |
860 | } |
861 | QualType withRestrict() const { |
862 | return withFastQualifiers(Qualifiers::Restrict); |
863 | } |
864 | |
865 | QualType withCVRQualifiers(unsigned CVR) const { |
866 | return withFastQualifiers(CVR); |
867 | } |
868 | |
869 | void addFastQualifiers(unsigned TQs) { |
870 | assert(!(TQs & ~Qualifiers::FastMask)(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 871, __extension__ __PRETTY_FUNCTION__)) |
871 | && "non-fast qualifier bits set in mask!")(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 871, __extension__ __PRETTY_FUNCTION__)); |
872 | Value.setInt(Value.getInt() | TQs); |
873 | } |
874 | |
875 | void removeLocalConst(); |
876 | void removeLocalVolatile(); |
877 | void removeLocalRestrict(); |
878 | void removeLocalCVRQualifiers(unsigned Mask); |
879 | |
880 | void removeLocalFastQualifiers() { Value.setInt(0); } |
881 | void removeLocalFastQualifiers(unsigned Mask) { |
882 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")(static_cast <bool> (!(Mask & ~Qualifiers::FastMask ) && "mask has non-fast qualifiers") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 882, __extension__ __PRETTY_FUNCTION__)); |
883 | Value.setInt(Value.getInt() & ~Mask); |
884 | } |
885 | |
886 | // Creates a type with the given qualifiers in addition to any |
887 | // qualifiers already on this type. |
888 | QualType withFastQualifiers(unsigned TQs) const { |
889 | QualType T = *this; |
890 | T.addFastQualifiers(TQs); |
891 | return T; |
892 | } |
893 | |
894 | // Creates a type with exactly the given fast qualifiers, removing |
895 | // any existing fast qualifiers. |
896 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
897 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
898 | } |
899 | |
900 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
901 | QualType withoutLocalFastQualifiers() const { |
902 | QualType T = *this; |
903 | T.removeLocalFastQualifiers(); |
904 | return T; |
905 | } |
906 | |
907 | QualType getCanonicalType() const; |
908 | |
909 | /// Return this type with all of the instance-specific qualifiers |
910 | /// removed, but without removing any qualifiers that may have been applied |
911 | /// through typedefs. |
912 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
913 | |
914 | /// Retrieve the unqualified variant of the given type, |
915 | /// removing as little sugar as possible. |
916 | /// |
917 | /// This routine looks through various kinds of sugar to find the |
918 | /// least-desugared type that is unqualified. For example, given: |
919 | /// |
920 | /// \code |
921 | /// typedef int Integer; |
922 | /// typedef const Integer CInteger; |
923 | /// typedef CInteger DifferenceType; |
924 | /// \endcode |
925 | /// |
926 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
927 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
928 | /// |
929 | /// The resulting type might still be qualified if it's sugar for an array |
930 | /// type. To strip qualifiers even from within a sugared array type, use |
931 | /// ASTContext::getUnqualifiedArrayType. |
932 | inline QualType getUnqualifiedType() const; |
933 | |
934 | /// Retrieve the unqualified variant of the given type, removing as little |
935 | /// sugar as possible. |
936 | /// |
937 | /// Like getUnqualifiedType(), but also returns the set of |
938 | /// qualifiers that were built up. |
939 | /// |
940 | /// The resulting type might still be qualified if it's sugar for an array |
941 | /// type. To strip qualifiers even from within a sugared array type, use |
942 | /// ASTContext::getUnqualifiedArrayType. |
943 | inline SplitQualType getSplitUnqualifiedType() const; |
944 | |
945 | /// Determine whether this type is more qualified than the other |
946 | /// given type, requiring exact equality for non-CVR qualifiers. |
947 | bool isMoreQualifiedThan(QualType Other) const; |
948 | |
949 | /// Determine whether this type is at least as qualified as the other |
950 | /// given type, requiring exact equality for non-CVR qualifiers. |
951 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
952 | |
953 | QualType getNonReferenceType() const; |
954 | |
955 | /// Determine the type of a (typically non-lvalue) expression with the |
956 | /// specified result type. |
957 | /// |
958 | /// This routine should be used for expressions for which the return type is |
959 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
960 | /// an lvalue. It removes a top-level reference (since there are no |
961 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
962 | /// from non-class types (in C++) or all types (in C). |
963 | QualType getNonLValueExprType(const ASTContext &Context) const; |
964 | |
965 | /// Remove an outer pack expansion type (if any) from this type. Used as part |
966 | /// of converting the type of a declaration to the type of an expression that |
967 | /// references that expression. It's meaningless for an expression to have a |
968 | /// pack expansion type. |
969 | QualType getNonPackExpansionType() const; |
970 | |
971 | /// Return the specified type with any "sugar" removed from |
972 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
973 | /// the type is already concrete, it returns it unmodified. This is similar |
974 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
975 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
976 | /// concrete. |
977 | /// |
978 | /// Qualifiers are left in place. |
979 | QualType getDesugaredType(const ASTContext &Context) const { |
980 | return getDesugaredType(*this, Context); |
981 | } |
982 | |
983 | SplitQualType getSplitDesugaredType() const { |
984 | return getSplitDesugaredType(*this); |
985 | } |
986 | |
987 | /// Return the specified type with one level of "sugar" removed from |
988 | /// the type. |
989 | /// |
990 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
991 | /// of the type is already concrete, it returns it unmodified. |
992 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
993 | return getSingleStepDesugaredTypeImpl(*this, Context); |
994 | } |
995 | |
996 | /// Returns the specified type after dropping any |
997 | /// outer-level parentheses. |
998 | QualType IgnoreParens() const { |
999 | if (isa<ParenType>(*this)) |
1000 | return QualType::IgnoreParens(*this); |
1001 | return *this; |
1002 | } |
1003 | |
1004 | /// Indicate whether the specified types and qualifiers are identical. |
1005 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
1006 | return LHS.Value == RHS.Value; |
1007 | } |
1008 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
1009 | return LHS.Value != RHS.Value; |
1010 | } |
1011 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
1012 | return LHS.Value < RHS.Value; |
1013 | } |
1014 | |
1015 | static std::string getAsString(SplitQualType split, |
1016 | const PrintingPolicy &Policy) { |
1017 | return getAsString(split.Ty, split.Quals, Policy); |
1018 | } |
1019 | static std::string getAsString(const Type *ty, Qualifiers qs, |
1020 | const PrintingPolicy &Policy); |
1021 | |
1022 | std::string getAsString() const; |
1023 | std::string getAsString(const PrintingPolicy &Policy) const; |
1024 | |
1025 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
1026 | const Twine &PlaceHolder = Twine(), |
1027 | unsigned Indentation = 0) const; |
1028 | |
1029 | static void print(SplitQualType split, raw_ostream &OS, |
1030 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
1031 | unsigned Indentation = 0) { |
1032 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
1033 | } |
1034 | |
1035 | static void print(const Type *ty, Qualifiers qs, |
1036 | raw_ostream &OS, const PrintingPolicy &policy, |
1037 | const Twine &PlaceHolder, |
1038 | unsigned Indentation = 0); |
1039 | |
1040 | void getAsStringInternal(std::string &Str, |
1041 | const PrintingPolicy &Policy) const; |
1042 | |
1043 | static void getAsStringInternal(SplitQualType split, std::string &out, |
1044 | const PrintingPolicy &policy) { |
1045 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
1046 | } |
1047 | |
1048 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
1049 | std::string &out, |
1050 | const PrintingPolicy &policy); |
1051 | |
1052 | class StreamedQualTypeHelper { |
1053 | const QualType &T; |
1054 | const PrintingPolicy &Policy; |
1055 | const Twine &PlaceHolder; |
1056 | unsigned Indentation; |
1057 | |
1058 | public: |
1059 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
1060 | const Twine &PlaceHolder, unsigned Indentation) |
1061 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
1062 | Indentation(Indentation) {} |
1063 | |
1064 | friend raw_ostream &operator<<(raw_ostream &OS, |
1065 | const StreamedQualTypeHelper &SQT) { |
1066 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
1067 | return OS; |
1068 | } |
1069 | }; |
1070 | |
1071 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
1072 | const Twine &PlaceHolder = Twine(), |
1073 | unsigned Indentation = 0) const { |
1074 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
1075 | } |
1076 | |
1077 | void dump(const char *s) const; |
1078 | void dump() const; |
1079 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
1080 | |
1081 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1082 | ID.AddPointer(getAsOpaquePtr()); |
1083 | } |
1084 | |
1085 | /// Check if this type has any address space qualifier. |
1086 | inline bool hasAddressSpace() const; |
1087 | |
1088 | /// Return the address space of this type. |
1089 | inline LangAS getAddressSpace() const; |
1090 | |
1091 | /// Returns true if address space qualifiers overlap with T address space |
1092 | /// qualifiers. |
1093 | /// OpenCL C defines conversion rules for pointers to different address spaces |
1094 | /// and notion of overlapping address spaces. |
1095 | /// CL1.1 or CL1.2: |
1096 | /// address spaces overlap iff they are they same. |
1097 | /// OpenCL C v2.0 s6.5.5 adds: |
1098 | /// __generic overlaps with any address space except for __constant. |
1099 | bool isAddressSpaceOverlapping(QualType T) const { |
1100 | Qualifiers Q = getQualifiers(); |
1101 | Qualifiers TQ = T.getQualifiers(); |
1102 | // Address spaces overlap if at least one of them is a superset of another |
1103 | return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q); |
1104 | } |
1105 | |
1106 | /// Returns gc attribute of this type. |
1107 | inline Qualifiers::GC getObjCGCAttr() const; |
1108 | |
1109 | /// true when Type is objc's weak. |
1110 | bool isObjCGCWeak() const { |
1111 | return getObjCGCAttr() == Qualifiers::Weak; |
1112 | } |
1113 | |
1114 | /// true when Type is objc's strong. |
1115 | bool isObjCGCStrong() const { |
1116 | return getObjCGCAttr() == Qualifiers::Strong; |
1117 | } |
1118 | |
1119 | /// Returns lifetime attribute of this type. |
1120 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1121 | return getQualifiers().getObjCLifetime(); |
1122 | } |
1123 | |
1124 | bool hasNonTrivialObjCLifetime() const { |
1125 | return getQualifiers().hasNonTrivialObjCLifetime(); |
1126 | } |
1127 | |
1128 | bool hasStrongOrWeakObjCLifetime() const { |
1129 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
1130 | } |
1131 | |
1132 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
1133 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
1134 | |
1135 | enum PrimitiveDefaultInitializeKind { |
1136 | /// The type does not fall into any of the following categories. Note that |
1137 | /// this case is zero-valued so that values of this enum can be used as a |
1138 | /// boolean condition for non-triviality. |
1139 | PDIK_Trivial, |
1140 | |
1141 | /// The type is an Objective-C retainable pointer type that is qualified |
1142 | /// with the ARC __strong qualifier. |
1143 | PDIK_ARCStrong, |
1144 | |
1145 | /// The type is an Objective-C retainable pointer type that is qualified |
1146 | /// with the ARC __weak qualifier. |
1147 | PDIK_ARCWeak, |
1148 | |
1149 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
1150 | PDIK_Struct |
1151 | }; |
1152 | |
1153 | /// Functions to query basic properties of non-trivial C struct types. |
1154 | |
1155 | /// Check if this is a non-trivial type that would cause a C struct |
1156 | /// transitively containing this type to be non-trivial to default initialize |
1157 | /// and return the kind. |
1158 | PrimitiveDefaultInitializeKind |
1159 | isNonTrivialToPrimitiveDefaultInitialize() const; |
1160 | |
1161 | enum PrimitiveCopyKind { |
1162 | /// The type does not fall into any of the following categories. Note that |
1163 | /// this case is zero-valued so that values of this enum can be used as a |
1164 | /// boolean condition for non-triviality. |
1165 | PCK_Trivial, |
1166 | |
1167 | /// The type would be trivial except that it is volatile-qualified. Types |
1168 | /// that fall into one of the other non-trivial cases may additionally be |
1169 | /// volatile-qualified. |
1170 | PCK_VolatileTrivial, |
1171 | |
1172 | /// The type is an Objective-C retainable pointer type that is qualified |
1173 | /// with the ARC __strong qualifier. |
1174 | PCK_ARCStrong, |
1175 | |
1176 | /// The type is an Objective-C retainable pointer type that is qualified |
1177 | /// with the ARC __weak qualifier. |
1178 | PCK_ARCWeak, |
1179 | |
1180 | /// The type is a struct containing a field whose type is neither |
1181 | /// PCK_Trivial nor PCK_VolatileTrivial. |
1182 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
1183 | /// semantics are too complex to express here, in part because they depend |
1184 | /// on the exact constructor or assignment operator that is chosen by |
1185 | /// overload resolution to do the copy. |
1186 | PCK_Struct |
1187 | }; |
1188 | |
1189 | /// Check if this is a non-trivial type that would cause a C struct |
1190 | /// transitively containing this type to be non-trivial to copy and return the |
1191 | /// kind. |
1192 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
1193 | |
1194 | /// Check if this is a non-trivial type that would cause a C struct |
1195 | /// transitively containing this type to be non-trivial to destructively |
1196 | /// move and return the kind. Destructive move in this context is a C++-style |
1197 | /// move in which the source object is placed in a valid but unspecified state |
1198 | /// after it is moved, as opposed to a truly destructive move in which the |
1199 | /// source object is placed in an uninitialized state. |
1200 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
1201 | |
1202 | enum DestructionKind { |
1203 | DK_none, |
1204 | DK_cxx_destructor, |
1205 | DK_objc_strong_lifetime, |
1206 | DK_objc_weak_lifetime, |
1207 | DK_nontrivial_c_struct |
1208 | }; |
1209 | |
1210 | /// Returns a nonzero value if objects of this type require |
1211 | /// non-trivial work to clean up after. Non-zero because it's |
1212 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
1213 | /// something require destruction. |
1214 | DestructionKind isDestructedType() const { |
1215 | return isDestructedTypeImpl(*this); |
1216 | } |
1217 | |
1218 | /// Check if this is or contains a C union that is non-trivial to |
1219 | /// default-initialize, which is a union that has a member that is non-trivial |
1220 | /// to default-initialize. If this returns true, |
1221 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
1222 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
1223 | |
1224 | /// Check if this is or contains a C union that is non-trivial to destruct, |
1225 | /// which is a union that has a member that is non-trivial to destruct. If |
1226 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
1227 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
1228 | |
1229 | /// Check if this is or contains a C union that is non-trivial to copy, which |
1230 | /// is a union that has a member that is non-trivial to copy. If this returns |
1231 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
1232 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
1233 | |
1234 | /// Determine whether expressions of the given type are forbidden |
1235 | /// from being lvalues in C. |
1236 | /// |
1237 | /// The expression types that are forbidden to be lvalues are: |
1238 | /// - 'void', but not qualified void |
1239 | /// - function types |
1240 | /// |
1241 | /// The exact rule here is C99 6.3.2.1: |
1242 | /// An lvalue is an expression with an object type or an incomplete |
1243 | /// type other than void. |
1244 | bool isCForbiddenLValueType() const; |
1245 | |
1246 | /// Substitute type arguments for the Objective-C type parameters used in the |
1247 | /// subject type. |
1248 | /// |
1249 | /// \param ctx ASTContext in which the type exists. |
1250 | /// |
1251 | /// \param typeArgs The type arguments that will be substituted for the |
1252 | /// Objective-C type parameters in the subject type, which are generally |
1253 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
1254 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
1255 | /// for the context. |
1256 | /// |
1257 | /// \param context The context in which the subject type was written. |
1258 | /// |
1259 | /// \returns the resulting type. |
1260 | QualType substObjCTypeArgs(ASTContext &ctx, |
1261 | ArrayRef<QualType> typeArgs, |
1262 | ObjCSubstitutionContext context) const; |
1263 | |
1264 | /// Substitute type arguments from an object type for the Objective-C type |
1265 | /// parameters used in the subject type. |
1266 | /// |
1267 | /// This operation combines the computation of type arguments for |
1268 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
1269 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
1270 | /// callers that need to perform a single substitution in isolation. |
1271 | /// |
1272 | /// \param objectType The type of the object whose member type we're |
1273 | /// substituting into. For example, this might be the receiver of a message |
1274 | /// or the base of a property access. |
1275 | /// |
1276 | /// \param dc The declaration context from which the subject type was |
1277 | /// retrieved, which indicates (for example) which type parameters should |
1278 | /// be substituted. |
1279 | /// |
1280 | /// \param context The context in which the subject type was written. |
1281 | /// |
1282 | /// \returns the subject type after replacing all of the Objective-C type |
1283 | /// parameters with their corresponding arguments. |
1284 | QualType substObjCMemberType(QualType objectType, |
1285 | const DeclContext *dc, |
1286 | ObjCSubstitutionContext context) const; |
1287 | |
1288 | /// Strip Objective-C "__kindof" types from the given type. |
1289 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
1290 | |
1291 | /// Remove all qualifiers including _Atomic. |
1292 | QualType getAtomicUnqualifiedType() const; |
1293 | |
1294 | private: |
1295 | // These methods are implemented in a separate translation unit; |
1296 | // "static"-ize them to avoid creating temporary QualTypes in the |
1297 | // caller. |
1298 | static bool isConstant(QualType T, const ASTContext& Ctx); |
1299 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
1300 | static SplitQualType getSplitDesugaredType(QualType T); |
1301 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
1302 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
1303 | const ASTContext &C); |
1304 | static QualType IgnoreParens(QualType T); |
1305 | static DestructionKind isDestructedTypeImpl(QualType type); |
1306 | |
1307 | /// Check if \param RD is or contains a non-trivial C union. |
1308 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
1309 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
1310 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
1311 | }; |
1312 | |
1313 | } // namespace clang |
1314 | |
1315 | namespace llvm { |
1316 | |
1317 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
1318 | /// to a specific Type class. |
1319 | template<> struct simplify_type< ::clang::QualType> { |
1320 | using SimpleType = const ::clang::Type *; |
1321 | |
1322 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
1323 | return Val.getTypePtr(); |
1324 | } |
1325 | }; |
1326 | |
1327 | // Teach SmallPtrSet that QualType is "basically a pointer". |
1328 | template<> |
1329 | struct PointerLikeTypeTraits<clang::QualType> { |
1330 | static inline void *getAsVoidPointer(clang::QualType P) { |
1331 | return P.getAsOpaquePtr(); |
1332 | } |
1333 | |
1334 | static inline clang::QualType getFromVoidPointer(void *P) { |
1335 | return clang::QualType::getFromOpaquePtr(P); |
1336 | } |
1337 | |
1338 | // Various qualifiers go in low bits. |
1339 | static constexpr int NumLowBitsAvailable = 0; |
1340 | }; |
1341 | |
1342 | } // namespace llvm |
1343 | |
1344 | namespace clang { |
1345 | |
1346 | /// Base class that is common to both the \c ExtQuals and \c Type |
1347 | /// classes, which allows \c QualType to access the common fields between the |
1348 | /// two. |
1349 | class ExtQualsTypeCommonBase { |
1350 | friend class ExtQuals; |
1351 | friend class QualType; |
1352 | friend class Type; |
1353 | |
1354 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
1355 | /// a self-referential pointer (for \c Type). |
1356 | /// |
1357 | /// This pointer allows an efficient mapping from a QualType to its |
1358 | /// underlying type pointer. |
1359 | const Type *const BaseType; |
1360 | |
1361 | /// The canonical type of this type. A QualType. |
1362 | QualType CanonicalType; |
1363 | |
1364 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
1365 | : BaseType(baseType), CanonicalType(canon) {} |
1366 | }; |
1367 | |
1368 | /// We can encode up to four bits in the low bits of a |
1369 | /// type pointer, but there are many more type qualifiers that we want |
1370 | /// to be able to apply to an arbitrary type. Therefore we have this |
1371 | /// struct, intended to be heap-allocated and used by QualType to |
1372 | /// store qualifiers. |
1373 | /// |
1374 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
1375 | /// in three low bits on the QualType pointer; a fourth bit records whether |
1376 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
1377 | /// Objective-C GC attributes) are much more rare. |
1378 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
1379 | // NOTE: changing the fast qualifiers should be straightforward as |
1380 | // long as you don't make 'const' non-fast. |
1381 | // 1. Qualifiers: |
1382 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
1383 | // Fast qualifiers must occupy the low-order bits. |
1384 | // b) Update Qualifiers::FastWidth and FastMask. |
1385 | // 2. QualType: |
1386 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
1387 | // b) Update remove{Volatile,Restrict}, defined near the end of |
1388 | // this header. |
1389 | // 3. ASTContext: |
1390 | // a) Update get{Volatile,Restrict}Type. |
1391 | |
1392 | /// The immutable set of qualifiers applied by this node. Always contains |
1393 | /// extended qualifiers. |
1394 | Qualifiers Quals; |
1395 | |
1396 | ExtQuals *this_() { return this; } |
1397 | |
1398 | public: |
1399 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
1400 | : ExtQualsTypeCommonBase(baseType, |
1401 | canon.isNull() ? QualType(this_(), 0) : canon), |
1402 | Quals(quals) { |
1403 | assert(Quals.hasNonFastQualifiers()(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1404, __extension__ __PRETTY_FUNCTION__)) |
1404 | && "ExtQuals created with no fast qualifiers")(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1404, __extension__ __PRETTY_FUNCTION__)); |
1405 | assert(!Quals.hasFastQualifiers()(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1406, __extension__ __PRETTY_FUNCTION__)) |
1406 | && "ExtQuals created with fast qualifiers")(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1406, __extension__ __PRETTY_FUNCTION__)); |
1407 | } |
1408 | |
1409 | Qualifiers getQualifiers() const { return Quals; } |
1410 | |
1411 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
1412 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
1413 | |
1414 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
1415 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1416 | return Quals.getObjCLifetime(); |
1417 | } |
1418 | |
1419 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
1420 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
1421 | |
1422 | const Type *getBaseType() const { return BaseType; } |
1423 | |
1424 | public: |
1425 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1426 | Profile(ID, getBaseType(), Quals); |
1427 | } |
1428 | |
1429 | static void Profile(llvm::FoldingSetNodeID &ID, |
1430 | const Type *BaseType, |
1431 | Qualifiers Quals) { |
1432 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")(static_cast <bool> (!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1432, __extension__ __PRETTY_FUNCTION__)); |
1433 | ID.AddPointer(BaseType); |
1434 | Quals.Profile(ID); |
1435 | } |
1436 | }; |
1437 | |
1438 | /// The kind of C++11 ref-qualifier associated with a function type. |
1439 | /// This determines whether a member function's "this" object can be an |
1440 | /// lvalue, rvalue, or neither. |
1441 | enum RefQualifierKind { |
1442 | /// No ref-qualifier was provided. |
1443 | RQ_None = 0, |
1444 | |
1445 | /// An lvalue ref-qualifier was provided (\c &). |
1446 | RQ_LValue, |
1447 | |
1448 | /// An rvalue ref-qualifier was provided (\c &&). |
1449 | RQ_RValue |
1450 | }; |
1451 | |
1452 | /// Which keyword(s) were used to create an AutoType. |
1453 | enum class AutoTypeKeyword { |
1454 | /// auto |
1455 | Auto, |
1456 | |
1457 | /// decltype(auto) |
1458 | DecltypeAuto, |
1459 | |
1460 | /// __auto_type (GNU extension) |
1461 | GNUAutoType |
1462 | }; |
1463 | |
1464 | /// The base class of the type hierarchy. |
1465 | /// |
1466 | /// A central concept with types is that each type always has a canonical |
1467 | /// type. A canonical type is the type with any typedef names stripped out |
1468 | /// of it or the types it references. For example, consider: |
1469 | /// |
1470 | /// typedef int foo; |
1471 | /// typedef foo* bar; |
1472 | /// 'int *' 'foo *' 'bar' |
1473 | /// |
1474 | /// There will be a Type object created for 'int'. Since int is canonical, its |
1475 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
1476 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
1477 | /// there is a PointerType that represents 'int*', which, like 'int', is |
1478 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
1479 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
1480 | /// is also 'int*'. |
1481 | /// |
1482 | /// Non-canonical types are useful for emitting diagnostics, without losing |
1483 | /// information about typedefs being used. Canonical types are useful for type |
1484 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
1485 | /// about whether something has a particular form (e.g. is a function type), |
1486 | /// because they implicitly, recursively, strip all typedefs out of a type. |
1487 | /// |
1488 | /// Types, once created, are immutable. |
1489 | /// |
1490 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
1491 | public: |
1492 | enum TypeClass { |
1493 | #define TYPE(Class, Base) Class, |
1494 | #define LAST_TYPE(Class) TypeLast = Class |
1495 | #define ABSTRACT_TYPE(Class, Base) |
1496 | #include "clang/AST/TypeNodes.inc" |
1497 | }; |
1498 | |
1499 | private: |
1500 | /// Bitfields required by the Type class. |
1501 | class TypeBitfields { |
1502 | friend class Type; |
1503 | template <class T> friend class TypePropertyCache; |
1504 | |
1505 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
1506 | unsigned TC : 8; |
1507 | |
1508 | /// Store information on the type dependency. |
1509 | unsigned Dependence : llvm::BitWidth<TypeDependence>; |
1510 | |
1511 | /// True if the cache (i.e. the bitfields here starting with |
1512 | /// 'Cache') is valid. |
1513 | mutable unsigned CacheValid : 1; |
1514 | |
1515 | /// Linkage of this type. |
1516 | mutable unsigned CachedLinkage : 3; |
1517 | |
1518 | /// Whether this type involves and local or unnamed types. |
1519 | mutable unsigned CachedLocalOrUnnamed : 1; |
1520 | |
1521 | /// Whether this type comes from an AST file. |
1522 | mutable unsigned FromAST : 1; |
1523 | |
1524 | bool isCacheValid() const { |
1525 | return CacheValid; |
1526 | } |
1527 | |
1528 | Linkage getLinkage() const { |
1529 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1529, __extension__ __PRETTY_FUNCTION__)); |
1530 | return static_cast<Linkage>(CachedLinkage); |
1531 | } |
1532 | |
1533 | bool hasLocalOrUnnamedType() const { |
1534 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 1534, __extension__ __PRETTY_FUNCTION__)); |
1535 | return CachedLocalOrUnnamed; |
1536 | } |
1537 | }; |
1538 | enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 }; |
1539 | |
1540 | protected: |
1541 | // These classes allow subclasses to somewhat cleanly pack bitfields |
1542 | // into Type. |
1543 | |
1544 | class ArrayTypeBitfields { |
1545 | friend class ArrayType; |
1546 | |
1547 | unsigned : NumTypeBits; |
1548 | |
1549 | /// CVR qualifiers from declarations like |
1550 | /// 'int X[static restrict 4]'. For function parameters only. |
1551 | unsigned IndexTypeQuals : 3; |
1552 | |
1553 | /// Storage class qualifiers from declarations like |
1554 | /// 'int X[static restrict 4]'. For function parameters only. |
1555 | /// Actually an ArrayType::ArraySizeModifier. |
1556 | unsigned SizeModifier : 3; |
1557 | }; |
1558 | |
1559 | class ConstantArrayTypeBitfields { |
1560 | friend class ConstantArrayType; |
1561 | |
1562 | unsigned : NumTypeBits + 3 + 3; |
1563 | |
1564 | /// Whether we have a stored size expression. |
1565 | unsigned HasStoredSizeExpr : 1; |
1566 | }; |
1567 | |
1568 | class BuiltinTypeBitfields { |
1569 | friend class BuiltinType; |
1570 | |
1571 | unsigned : NumTypeBits; |
1572 | |
1573 | /// The kind (BuiltinType::Kind) of builtin type this is. |
1574 | unsigned Kind : 8; |
1575 | }; |
1576 | |
1577 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
1578 | /// Only common bits are stored here. Additional uncommon bits are stored |
1579 | /// in a trailing object after FunctionProtoType. |
1580 | class FunctionTypeBitfields { |
1581 | friend class FunctionProtoType; |
1582 | friend class FunctionType; |
1583 | |
1584 | unsigned : NumTypeBits; |
1585 | |
1586 | /// Extra information which affects how the function is called, like |
1587 | /// regparm and the calling convention. |
1588 | unsigned ExtInfo : 13; |
1589 | |
1590 | /// The ref-qualifier associated with a \c FunctionProtoType. |
1591 | /// |
1592 | /// This is a value of type \c RefQualifierKind. |
1593 | unsigned RefQualifier : 2; |
1594 | |
1595 | /// Used only by FunctionProtoType, put here to pack with the |
1596 | /// other bitfields. |
1597 | /// The qualifiers are part of FunctionProtoType because... |
1598 | /// |
1599 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
1600 | /// cv-qualifier-seq, [...], are part of the function type. |
1601 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
1602 | /// Whether this function has extended Qualifiers. |
1603 | unsigned HasExtQuals : 1; |
1604 | |
1605 | /// The number of parameters this function has, not counting '...'. |
1606 | /// According to [implimits] 8 bits should be enough here but this is |
1607 | /// somewhat easy to exceed with metaprogramming and so we would like to |
1608 | /// keep NumParams as wide as reasonably possible. |
1609 | unsigned NumParams : 16; |
1610 | |
1611 | /// The type of exception specification this function has. |
1612 | unsigned ExceptionSpecType : 4; |
1613 | |
1614 | /// Whether this function has extended parameter information. |
1615 | unsigned HasExtParameterInfos : 1; |
1616 | |
1617 | /// Whether the function is variadic. |
1618 | unsigned Variadic : 1; |
1619 | |
1620 | /// Whether this function has a trailing return type. |
1621 | unsigned HasTrailingReturn : 1; |
1622 | }; |
1623 | |
1624 | class ObjCObjectTypeBitfields { |
1625 | friend class ObjCObjectType; |
1626 | |
1627 | unsigned : NumTypeBits; |
1628 | |
1629 | /// The number of type arguments stored directly on this object type. |
1630 | unsigned NumTypeArgs : 7; |
1631 | |
1632 | /// The number of protocols stored directly on this object type. |
1633 | unsigned NumProtocols : 6; |
1634 | |
1635 | /// Whether this is a "kindof" type. |
1636 | unsigned IsKindOf : 1; |
1637 | }; |
1638 | |
1639 | class ReferenceTypeBitfields { |
1640 | friend class ReferenceType; |
1641 | |
1642 | unsigned : NumTypeBits; |
1643 | |
1644 | /// True if the type was originally spelled with an lvalue sigil. |
1645 | /// This is never true of rvalue references but can also be false |
1646 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
1647 | /// as follows: |
1648 | /// |
1649 | /// typedef int &ref; // lvalue, spelled lvalue |
1650 | /// typedef int &&rvref; // rvalue |
1651 | /// ref &a; // lvalue, inner ref, spelled lvalue |
1652 | /// ref &&a; // lvalue, inner ref |
1653 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
1654 | /// rvref &&a; // rvalue, inner ref |
1655 | unsigned SpelledAsLValue : 1; |
1656 | |
1657 | /// True if the inner type is a reference type. This only happens |
1658 | /// in non-canonical forms. |
1659 | unsigned InnerRef : 1; |
1660 | }; |
1661 | |
1662 | class TypeWithKeywordBitfields { |
1663 | friend class TypeWithKeyword; |
1664 | |
1665 | unsigned : NumTypeBits; |
1666 | |
1667 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
1668 | unsigned Keyword : 8; |
1669 | }; |
1670 | |
1671 | enum { NumTypeWithKeywordBits = 8 }; |
1672 | |
1673 | class ElaboratedTypeBitfields { |
1674 | friend class ElaboratedType; |
1675 | |
1676 | unsigned : NumTypeBits; |
1677 | unsigned : NumTypeWithKeywordBits; |
1678 | |
1679 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
1680 | unsigned HasOwnedTagDecl : 1; |
1681 | }; |
1682 | |
1683 | class VectorTypeBitfields { |
1684 | friend class VectorType; |
1685 | friend class DependentVectorType; |
1686 | |
1687 | unsigned : NumTypeBits; |
1688 | |
1689 | /// The kind of vector, either a generic vector type or some |
1690 | /// target-specific vector type such as for AltiVec or Neon. |
1691 | unsigned VecKind : 3; |
1692 | /// The number of elements in the vector. |
1693 | uint32_t NumElements; |
1694 | }; |
1695 | |
1696 | class AttributedTypeBitfields { |
1697 | friend class AttributedType; |
1698 | |
1699 | unsigned : NumTypeBits; |
1700 | |
1701 | /// An AttributedType::Kind |
1702 | unsigned AttrKind : 32 - NumTypeBits; |
1703 | }; |
1704 | |
1705 | class AutoTypeBitfields { |
1706 | friend class AutoType; |
1707 | |
1708 | unsigned : NumTypeBits; |
1709 | |
1710 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
1711 | /// or '__auto_type'? AutoTypeKeyword value. |
1712 | unsigned Keyword : 2; |
1713 | |
1714 | /// The number of template arguments in the type-constraints, which is |
1715 | /// expected to be able to hold at least 1024 according to [implimits]. |
1716 | /// However as this limit is somewhat easy to hit with template |
1717 | /// metaprogramming we'd prefer to keep it as large as possible. |
1718 | /// At the moment it has been left as a non-bitfield since this type |
1719 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1720 | /// introduce the performance impact of a bitfield. |
1721 | unsigned NumArgs; |
1722 | }; |
1723 | |
1724 | class SubstTemplateTypeParmPackTypeBitfields { |
1725 | friend class SubstTemplateTypeParmPackType; |
1726 | |
1727 | unsigned : NumTypeBits; |
1728 | |
1729 | /// The number of template arguments in \c Arguments, which is |
1730 | /// expected to be able to hold at least 1024 according to [implimits]. |
1731 | /// However as this limit is somewhat easy to hit with template |
1732 | /// metaprogramming we'd prefer to keep it as large as possible. |
1733 | /// At the moment it has been left as a non-bitfield since this type |
1734 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1735 | /// introduce the performance impact of a bitfield. |
1736 | unsigned NumArgs; |
1737 | }; |
1738 | |
1739 | class TemplateSpecializationTypeBitfields { |
1740 | friend class TemplateSpecializationType; |
1741 | |
1742 | unsigned : NumTypeBits; |
1743 | |
1744 | /// Whether this template specialization type is a substituted type alias. |
1745 | unsigned TypeAlias : 1; |
1746 | |
1747 | /// The number of template arguments named in this class template |
1748 | /// specialization, which is expected to be able to hold at least 1024 |
1749 | /// according to [implimits]. However, as this limit is somewhat easy to |
1750 | /// hit with template metaprogramming we'd prefer to keep it as large |
1751 | /// as possible. At the moment it has been left as a non-bitfield since |
1752 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1753 | /// to introduce the performance impact of a bitfield. |
1754 | unsigned NumArgs; |
1755 | }; |
1756 | |
1757 | class DependentTemplateSpecializationTypeBitfields { |
1758 | friend class DependentTemplateSpecializationType; |
1759 | |
1760 | unsigned : NumTypeBits; |
1761 | unsigned : NumTypeWithKeywordBits; |
1762 | |
1763 | /// The number of template arguments named in this class template |
1764 | /// specialization, which is expected to be able to hold at least 1024 |
1765 | /// according to [implimits]. However, as this limit is somewhat easy to |
1766 | /// hit with template metaprogramming we'd prefer to keep it as large |
1767 | /// as possible. At the moment it has been left as a non-bitfield since |
1768 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1769 | /// to introduce the performance impact of a bitfield. |
1770 | unsigned NumArgs; |
1771 | }; |
1772 | |
1773 | class PackExpansionTypeBitfields { |
1774 | friend class PackExpansionType; |
1775 | |
1776 | unsigned : NumTypeBits; |
1777 | |
1778 | /// The number of expansions that this pack expansion will |
1779 | /// generate when substituted (+1), which is expected to be able to |
1780 | /// hold at least 1024 according to [implimits]. However, as this limit |
1781 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
1782 | /// keep it as large as possible. At the moment it has been left as a |
1783 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
1784 | /// there is no reason to introduce the performance impact of a bitfield. |
1785 | /// |
1786 | /// This field will only have a non-zero value when some of the parameter |
1787 | /// packs that occur within the pattern have been substituted but others |
1788 | /// have not. |
1789 | unsigned NumExpansions; |
1790 | }; |
1791 | |
1792 | union { |
1793 | TypeBitfields TypeBits; |
1794 | ArrayTypeBitfields ArrayTypeBits; |
1795 | ConstantArrayTypeBitfields ConstantArrayTypeBits; |
1796 | AttributedTypeBitfields AttributedTypeBits; |
1797 | AutoTypeBitfields AutoTypeBits; |
1798 | BuiltinTypeBitfields BuiltinTypeBits; |
1799 | FunctionTypeBitfields FunctionTypeBits; |
1800 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
1801 | ReferenceTypeBitfields ReferenceTypeBits; |
1802 | TypeWithKeywordBitfields TypeWithKeywordBits; |
1803 | ElaboratedTypeBitfields ElaboratedTypeBits; |
1804 | VectorTypeBitfields VectorTypeBits; |
1805 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
1806 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
1807 | DependentTemplateSpecializationTypeBitfields |
1808 | DependentTemplateSpecializationTypeBits; |
1809 | PackExpansionTypeBitfields PackExpansionTypeBits; |
1810 | }; |
1811 | |
1812 | private: |
1813 | template <class T> friend class TypePropertyCache; |
1814 | |
1815 | /// Set whether this type comes from an AST file. |
1816 | void setFromAST(bool V = true) const { |
1817 | TypeBits.FromAST = V; |
1818 | } |
1819 | |
1820 | protected: |
1821 | friend class ASTContext; |
1822 | |
1823 | Type(TypeClass tc, QualType canon, TypeDependence Dependence) |
1824 | : ExtQualsTypeCommonBase(this, |
1825 | canon.isNull() ? QualType(this_(), 0) : canon) { |
1826 | static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase), |
1827 | "changing bitfields changed sizeof(Type)!"); |
1828 | static_assert(alignof(decltype(*this)) % sizeof(void *) == 0, |
1829 | "Insufficient alignment!"); |
1830 | TypeBits.TC = tc; |
1831 | TypeBits.Dependence = static_cast<unsigned>(Dependence); |
1832 | TypeBits.CacheValid = false; |
1833 | TypeBits.CachedLocalOrUnnamed = false; |
1834 | TypeBits.CachedLinkage = NoLinkage; |
1835 | TypeBits.FromAST = false; |
1836 | } |
1837 | |
1838 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
1839 | Type *this_() { return this; } |
1840 | |
1841 | void setDependence(TypeDependence D) { |
1842 | TypeBits.Dependence = static_cast<unsigned>(D); |
1843 | } |
1844 | |
1845 | void addDependence(TypeDependence D) { setDependence(getDependence() | D); } |
1846 | |
1847 | public: |
1848 | friend class ASTReader; |
1849 | friend class ASTWriter; |
1850 | template <class T> friend class serialization::AbstractTypeReader; |
1851 | template <class T> friend class serialization::AbstractTypeWriter; |
1852 | |
1853 | Type(const Type &) = delete; |
1854 | Type(Type &&) = delete; |
1855 | Type &operator=(const Type &) = delete; |
1856 | Type &operator=(Type &&) = delete; |
1857 | |
1858 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
1859 | |
1860 | /// Whether this type comes from an AST file. |
1861 | bool isFromAST() const { return TypeBits.FromAST; } |
1862 | |
1863 | /// Whether this type is or contains an unexpanded parameter |
1864 | /// pack, used to support C++0x variadic templates. |
1865 | /// |
1866 | /// A type that contains a parameter pack shall be expanded by the |
1867 | /// ellipsis operator at some point. For example, the typedef in the |
1868 | /// following example contains an unexpanded parameter pack 'T': |
1869 | /// |
1870 | /// \code |
1871 | /// template<typename ...T> |
1872 | /// struct X { |
1873 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
1874 | /// }; |
1875 | /// \endcode |
1876 | /// |
1877 | /// Note that this routine does not specify which |
1878 | bool containsUnexpandedParameterPack() const { |
1879 | return getDependence() & TypeDependence::UnexpandedPack; |
1880 | } |
1881 | |
1882 | /// Determines if this type would be canonical if it had no further |
1883 | /// qualification. |
1884 | bool isCanonicalUnqualified() const { |
1885 | return CanonicalType == QualType(this, 0); |
1886 | } |
1887 | |
1888 | /// Pull a single level of sugar off of this locally-unqualified type. |
1889 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
1890 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
1891 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
1892 | |
1893 | /// As an extension, we classify types as one of "sized" or "sizeless"; |
1894 | /// every type is one or the other. Standard types are all sized; |
1895 | /// sizeless types are purely an extension. |
1896 | /// |
1897 | /// Sizeless types contain data with no specified size, alignment, |
1898 | /// or layout. |
1899 | bool isSizelessType() const; |
1900 | bool isSizelessBuiltinType() const; |
1901 | |
1902 | /// Determines if this is a sizeless type supported by the |
1903 | /// 'arm_sve_vector_bits' type attribute, which can be applied to a single |
1904 | /// SVE vector or predicate, excluding tuple types such as svint32x4_t. |
1905 | bool isVLSTBuiltinType() const; |
1906 | |
1907 | /// Returns the representative type for the element of an SVE builtin type. |
1908 | /// This is used to represent fixed-length SVE vectors created with the |
1909 | /// 'arm_sve_vector_bits' type attribute as VectorType. |
1910 | QualType getSveEltType(const ASTContext &Ctx) const; |
1911 | |
1912 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
1913 | /// object types, function types, and incomplete types. |
1914 | |
1915 | /// Return true if this is an incomplete type. |
1916 | /// A type that can describe objects, but which lacks information needed to |
1917 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
1918 | /// routine will need to determine if the size is actually required. |
1919 | /// |
1920 | /// Def If non-null, and the type refers to some kind of declaration |
1921 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
1922 | /// class), will be set to the declaration. |
1923 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
1924 | |
1925 | /// Return true if this is an incomplete or object |
1926 | /// type, in other words, not a function type. |
1927 | bool isIncompleteOrObjectType() const { |
1928 | return !isFunctionType(); |
1929 | } |
1930 | |
1931 | /// Determine whether this type is an object type. |
1932 | bool isObjectType() const { |
1933 | // C++ [basic.types]p8: |
1934 | // An object type is a (possibly cv-qualified) type that is not a |
1935 | // function type, not a reference type, and not a void type. |
1936 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
1937 | } |
1938 | |
1939 | /// Return true if this is a literal type |
1940 | /// (C++11 [basic.types]p10) |
1941 | bool isLiteralType(const ASTContext &Ctx) const; |
1942 | |
1943 | /// Determine if this type is a structural type, per C++20 [temp.param]p7. |
1944 | bool isStructuralType() const; |
1945 | |
1946 | /// Test if this type is a standard-layout type. |
1947 | /// (C++0x [basic.type]p9) |
1948 | bool isStandardLayoutType() const; |
1949 | |
1950 | /// Helper methods to distinguish type categories. All type predicates |
1951 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
1952 | |
1953 | /// Returns true if the type is a builtin type. |
1954 | bool isBuiltinType() const; |
1955 | |
1956 | /// Test for a particular builtin type. |
1957 | bool isSpecificBuiltinType(unsigned K) const; |
1958 | |
1959 | /// Test for a type which does not represent an actual type-system type but |
1960 | /// is instead used as a placeholder for various convenient purposes within |
1961 | /// Clang. All such types are BuiltinTypes. |
1962 | bool isPlaceholderType() const; |
1963 | const BuiltinType *getAsPlaceholderType() const; |
1964 | |
1965 | /// Test for a specific placeholder type. |
1966 | bool isSpecificPlaceholderType(unsigned K) const; |
1967 | |
1968 | /// Test for a placeholder type other than Overload; see |
1969 | /// BuiltinType::isNonOverloadPlaceholderType. |
1970 | bool isNonOverloadPlaceholderType() const; |
1971 | |
1972 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
1973 | /// isComplexIntegerType() can be used to test for complex integers. |
1974 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
1975 | bool isEnumeralType() const; |
1976 | |
1977 | /// Determine whether this type is a scoped enumeration type. |
1978 | bool isScopedEnumeralType() const; |
1979 | bool isBooleanType() const; |
1980 | bool isCharType() const; |
1981 | bool isWideCharType() const; |
1982 | bool isChar8Type() const; |
1983 | bool isChar16Type() const; |
1984 | bool isChar32Type() const; |
1985 | bool isAnyCharacterType() const; |
1986 | bool isIntegralType(const ASTContext &Ctx) const; |
1987 | |
1988 | /// Determine whether this type is an integral or enumeration type. |
1989 | bool isIntegralOrEnumerationType() const; |
1990 | |
1991 | /// Determine whether this type is an integral or unscoped enumeration type. |
1992 | bool isIntegralOrUnscopedEnumerationType() const; |
1993 | bool isUnscopedEnumerationType() const; |
1994 | |
1995 | /// Floating point categories. |
1996 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
1997 | /// isComplexType() does *not* include complex integers (a GCC extension). |
1998 | /// isComplexIntegerType() can be used to test for complex integers. |
1999 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
2000 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
2001 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
2002 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
2003 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
2004 | bool isBFloat16Type() const; |
2005 | bool isFloat128Type() const; |
2006 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
2007 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
2008 | bool isVoidType() const; // C99 6.2.5p19 |
2009 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
2010 | bool isAggregateType() const; |
2011 | bool isFundamentalType() const; |
2012 | bool isCompoundType() const; |
2013 | |
2014 | // Type Predicates: Check to see if this type is structurally the specified |
2015 | // type, ignoring typedefs and qualifiers. |
2016 | bool isFunctionType() const; |
2017 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
2018 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
2019 | bool isPointerType() const; |
2020 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
2021 | bool isBlockPointerType() const; |
2022 | bool isVoidPointerType() const; |
2023 | bool isReferenceType() const; |
2024 | bool isLValueReferenceType() const; |
2025 | bool isRValueReferenceType() const; |
2026 | bool isObjectPointerType() const; |
2027 | bool isFunctionPointerType() const; |
2028 | bool isFunctionReferenceType() const; |
2029 | bool isMemberPointerType() const; |
2030 | bool isMemberFunctionPointerType() const; |
2031 | bool isMemberDataPointerType() const; |
2032 | bool isArrayType() const; |
2033 | bool isConstantArrayType() const; |
2034 | bool isIncompleteArrayType() const; |
2035 | bool isVariableArrayType() const; |
2036 | bool isDependentSizedArrayType() const; |
2037 | bool isRecordType() const; |
2038 | bool isClassType() const; |
2039 | bool isStructureType() const; |
2040 | bool isObjCBoxableRecordType() const; |
2041 | bool isInterfaceType() const; |
2042 | bool isStructureOrClassType() const; |
2043 | bool isUnionType() const; |
2044 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
2045 | bool isVectorType() const; // GCC vector type. |
2046 | bool isExtVectorType() const; // Extended vector type. |
2047 | bool isMatrixType() const; // Matrix type. |
2048 | bool isConstantMatrixType() const; // Constant matrix type. |
2049 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
2050 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
2051 | bool isObjCRetainableType() const; // ObjC object or block pointer |
2052 | bool isObjCLifetimeType() const; // (array of)* retainable type |
2053 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
2054 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
2055 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
2056 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
2057 | // for the common case. |
2058 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
2059 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
2060 | bool isObjCQualifiedIdType() const; // id<foo> |
2061 | bool isObjCQualifiedClassType() const; // Class<foo> |
2062 | bool isObjCObjectOrInterfaceType() const; |
2063 | bool isObjCIdType() const; // id |
2064 | bool isDecltypeType() const; |
2065 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
2066 | /// qualifier? |
2067 | /// |
2068 | /// This approximates the answer to the following question: if this |
2069 | /// translation unit were compiled in ARC, would this type be qualified |
2070 | /// with __unsafe_unretained? |
2071 | bool isObjCInertUnsafeUnretainedType() const { |
2072 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
2073 | } |
2074 | |
2075 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
2076 | /// object type, e.g., __kindof NSView * or __kindof id |
2077 | /// <NSCopying>. |
2078 | /// |
2079 | /// \param bound Will be set to the bound on non-id subtype types, |
2080 | /// which will be (possibly specialized) Objective-C class type, or |
2081 | /// null for 'id. |
2082 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
2083 | const ObjCObjectType *&bound) const; |
2084 | |
2085 | bool isObjCClassType() const; // Class |
2086 | |
2087 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
2088 | /// Class type, e.g., __kindof Class <NSCopying>. |
2089 | /// |
2090 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
2091 | /// here because Objective-C's type system cannot express "a class |
2092 | /// object for a subclass of NSFoo". |
2093 | bool isObjCClassOrClassKindOfType() const; |
2094 | |
2095 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
2096 | bool isObjCSelType() const; // Class |
2097 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
2098 | bool isObjCARCBridgableType() const; |
2099 | bool isCARCBridgableType() const; |
2100 | bool isTemplateTypeParmType() const; // C++ template type parameter |
2101 | bool isNullPtrType() const; // C++11 std::nullptr_t |
2102 | bool isNothrowT() const; // C++ std::nothrow_t |
2103 | bool isAlignValT() const; // C++17 std::align_val_t |
2104 | bool isStdByteType() const; // C++17 std::byte |
2105 | bool isAtomicType() const; // C11 _Atomic() |
2106 | bool isUndeducedAutoType() const; // C++11 auto or |
2107 | // C++14 decltype(auto) |
2108 | bool isTypedefNameType() const; // typedef or alias template |
2109 | |
2110 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
2111 | bool is##Id##Type() const; |
2112 | #include "clang/Basic/OpenCLImageTypes.def" |
2113 | |
2114 | bool isImageType() const; // Any OpenCL image type |
2115 | |
2116 | bool isSamplerT() const; // OpenCL sampler_t |
2117 | bool isEventT() const; // OpenCL event_t |
2118 | bool isClkEventT() const; // OpenCL clk_event_t |
2119 | bool isQueueT() const; // OpenCL queue_t |
2120 | bool isReserveIDT() const; // OpenCL reserve_id_t |
2121 | |
2122 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
2123 | bool is##Id##Type() const; |
2124 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2125 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
2126 | bool isOCLIntelSubgroupAVCType() const; |
2127 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
2128 | |
2129 | bool isPipeType() const; // OpenCL pipe type |
2130 | bool isExtIntType() const; // Extended Int Type |
2131 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
2132 | |
2133 | /// Determines if this type, which must satisfy |
2134 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
2135 | /// than implicitly __strong. |
2136 | bool isObjCARCImplicitlyUnretainedType() const; |
2137 | |
2138 | /// Check if the type is the CUDA device builtin surface type. |
2139 | bool isCUDADeviceBuiltinSurfaceType() const; |
2140 | /// Check if the type is the CUDA device builtin texture type. |
2141 | bool isCUDADeviceBuiltinTextureType() const; |
2142 | |
2143 | /// Return the implicit lifetime for this type, which must not be dependent. |
2144 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
2145 | |
2146 | enum ScalarTypeKind { |
2147 | STK_CPointer, |
2148 | STK_BlockPointer, |
2149 | STK_ObjCObjectPointer, |
2150 | STK_MemberPointer, |
2151 | STK_Bool, |
2152 | STK_Integral, |
2153 | STK_Floating, |
2154 | STK_IntegralComplex, |
2155 | STK_FloatingComplex, |
2156 | STK_FixedPoint |
2157 | }; |
2158 | |
2159 | /// Given that this is a scalar type, classify it. |
2160 | ScalarTypeKind getScalarTypeKind() const; |
2161 | |
2162 | TypeDependence getDependence() const { |
2163 | return static_cast<TypeDependence>(TypeBits.Dependence); |
2164 | } |
2165 | |
2166 | /// Whether this type is an error type. |
2167 | bool containsErrors() const { |
2168 | return getDependence() & TypeDependence::Error; |
2169 | } |
2170 | |
2171 | /// Whether this type is a dependent type, meaning that its definition |
2172 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
2173 | bool isDependentType() const { |
2174 | return getDependence() & TypeDependence::Dependent; |
2175 | } |
2176 | |
2177 | /// Determine whether this type is an instantiation-dependent type, |
2178 | /// meaning that the type involves a template parameter (even if the |
2179 | /// definition does not actually depend on the type substituted for that |
2180 | /// template parameter). |
2181 | bool isInstantiationDependentType() const { |
2182 | return getDependence() & TypeDependence::Instantiation; |
2183 | } |
2184 | |
2185 | /// Determine whether this type is an undeduced type, meaning that |
2186 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
2187 | /// deduced. |
2188 | bool isUndeducedType() const; |
2189 | |
2190 | /// Whether this type is a variably-modified type (C99 6.7.5). |
2191 | bool isVariablyModifiedType() const { |
2192 | return getDependence() & TypeDependence::VariablyModified; |
2193 | } |
2194 | |
2195 | /// Whether this type involves a variable-length array type |
2196 | /// with a definite size. |
2197 | bool hasSizedVLAType() const; |
2198 | |
2199 | /// Whether this type is or contains a local or unnamed type. |
2200 | bool hasUnnamedOrLocalType() const; |
2201 | |
2202 | bool isOverloadableType() const; |
2203 | |
2204 | /// Determine wither this type is a C++ elaborated-type-specifier. |
2205 | bool isElaboratedTypeSpecifier() const; |
2206 | |
2207 | bool canDecayToPointerType() const; |
2208 | |
2209 | /// Whether this type is represented natively as a pointer. This includes |
2210 | /// pointers, references, block pointers, and Objective-C interface, |
2211 | /// qualified id, and qualified interface types, as well as nullptr_t. |
2212 | bool hasPointerRepresentation() const; |
2213 | |
2214 | /// Whether this type can represent an objective pointer type for the |
2215 | /// purpose of GC'ability |
2216 | bool hasObjCPointerRepresentation() const; |
2217 | |
2218 | /// Determine whether this type has an integer representation |
2219 | /// of some sort, e.g., it is an integer type or a vector. |
2220 | bool hasIntegerRepresentation() const; |
2221 | |
2222 | /// Determine whether this type has an signed integer representation |
2223 | /// of some sort, e.g., it is an signed integer type or a vector. |
2224 | bool hasSignedIntegerRepresentation() const; |
2225 | |
2226 | /// Determine whether this type has an unsigned integer representation |
2227 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
2228 | bool hasUnsignedIntegerRepresentation() const; |
2229 | |
2230 | /// Determine whether this type has a floating-point representation |
2231 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
2232 | bool hasFloatingRepresentation() const; |
2233 | |
2234 | // Type Checking Functions: Check to see if this type is structurally the |
2235 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
2236 | // the best type we can. |
2237 | const RecordType *getAsStructureType() const; |
2238 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
2239 | const RecordType *getAsUnionType() const; |
2240 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
2241 | const ObjCObjectType *getAsObjCInterfaceType() const; |
2242 | |
2243 | // The following is a convenience method that returns an ObjCObjectPointerType |
2244 | // for object declared using an interface. |
2245 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
2246 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
2247 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
2248 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
2249 | |
2250 | /// Retrieves the CXXRecordDecl that this type refers to, either |
2251 | /// because the type is a RecordType or because it is the injected-class-name |
2252 | /// type of a class template or class template partial specialization. |
2253 | CXXRecordDecl *getAsCXXRecordDecl() const; |
2254 | |
2255 | /// Retrieves the RecordDecl this type refers to. |
2256 | RecordDecl *getAsRecordDecl() const; |
2257 | |
2258 | /// Retrieves the TagDecl that this type refers to, either |
2259 | /// because the type is a TagType or because it is the injected-class-name |
2260 | /// type of a class template or class template partial specialization. |
2261 | TagDecl *getAsTagDecl() const; |
2262 | |
2263 | /// If this is a pointer or reference to a RecordType, return the |
2264 | /// CXXRecordDecl that the type refers to. |
2265 | /// |
2266 | /// If this is not a pointer or reference, or the type being pointed to does |
2267 | /// not refer to a CXXRecordDecl, returns NULL. |
2268 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
2269 | |
2270 | /// Get the DeducedType whose type will be deduced for a variable with |
2271 | /// an initializer of this type. This looks through declarators like pointer |
2272 | /// types, but not through decltype or typedefs. |
2273 | DeducedType *getContainedDeducedType() const; |
2274 | |
2275 | /// Get the AutoType whose type will be deduced for a variable with |
2276 | /// an initializer of this type. This looks through declarators like pointer |
2277 | /// types, but not through decltype or typedefs. |
2278 | AutoType *getContainedAutoType() const { |
2279 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
2280 | } |
2281 | |
2282 | /// Determine whether this type was written with a leading 'auto' |
2283 | /// corresponding to a trailing return type (possibly for a nested |
2284 | /// function type within a pointer to function type or similar). |
2285 | bool hasAutoForTrailingReturnType() const; |
2286 | |
2287 | /// Member-template getAs<specific type>'. Look through sugar for |
2288 | /// an instance of \<specific type>. This scheme will eventually |
2289 | /// replace the specific getAsXXXX methods above. |
2290 | /// |
2291 | /// There are some specializations of this member template listed |
2292 | /// immediately following this class. |
2293 | template <typename T> const T *getAs() const; |
2294 | |
2295 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
2296 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
2297 | /// This is used when you need to walk over sugar nodes that represent some |
2298 | /// kind of type adjustment from a type that was written as a \<specific type> |
2299 | /// to another type that is still canonically a \<specific type>. |
2300 | template <typename T> const T *getAsAdjusted() const; |
2301 | |
2302 | /// A variant of getAs<> for array types which silently discards |
2303 | /// qualifiers from the outermost type. |
2304 | const ArrayType *getAsArrayTypeUnsafe() const; |
2305 | |
2306 | /// Member-template castAs<specific type>. Look through sugar for |
2307 | /// the underlying instance of \<specific type>. |
2308 | /// |
2309 | /// This method has the same relationship to getAs<T> as cast<T> has |
2310 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
2311 | /// have the intended type, and this method will never return null. |
2312 | template <typename T> const T *castAs() const; |
2313 | |
2314 | /// A variant of castAs<> for array type which silently discards |
2315 | /// qualifiers from the outermost type. |
2316 | const ArrayType *castAsArrayTypeUnsafe() const; |
2317 | |
2318 | /// Determine whether this type had the specified attribute applied to it |
2319 | /// (looking through top-level type sugar). |
2320 | bool hasAttr(attr::Kind AK) const; |
2321 | |
2322 | /// Get the base element type of this type, potentially discarding type |
2323 | /// qualifiers. This should never be used when type qualifiers |
2324 | /// are meaningful. |
2325 | const Type *getBaseElementTypeUnsafe() const; |
2326 | |
2327 | /// If this is an array type, return the element type of the array, |
2328 | /// potentially with type qualifiers missing. |
2329 | /// This should never be used when type qualifiers are meaningful. |
2330 | const Type *getArrayElementTypeNoTypeQual() const; |
2331 | |
2332 | /// If this is a pointer type, return the pointee type. |
2333 | /// If this is an array type, return the array element type. |
2334 | /// This should never be used when type qualifiers are meaningful. |
2335 | const Type *getPointeeOrArrayElementType() const; |
2336 | |
2337 | /// If this is a pointer, ObjC object pointer, or block |
2338 | /// pointer, this returns the respective pointee. |
2339 | QualType getPointeeType() const; |
2340 | |
2341 | /// Return the specified type with any "sugar" removed from the type, |
2342 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
2343 | const Type *getUnqualifiedDesugaredType() const; |
2344 | |
2345 | /// More type predicates useful for type checking/promotion |
2346 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
2347 | |
2348 | /// Return true if this is an integer type that is |
2349 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
2350 | /// or an enum decl which has a signed representation. |
2351 | bool isSignedIntegerType() const; |
2352 | |
2353 | /// Return true if this is an integer type that is |
2354 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
2355 | /// or an enum decl which has an unsigned representation. |
2356 | bool isUnsignedIntegerType() const; |
2357 | |
2358 | /// Determines whether this is an integer type that is signed or an |
2359 | /// enumeration types whose underlying type is a signed integer type. |
2360 | bool isSignedIntegerOrEnumerationType() const; |
2361 | |
2362 | /// Determines whether this is an integer type that is unsigned or an |
2363 | /// enumeration types whose underlying type is a unsigned integer type. |
2364 | bool isUnsignedIntegerOrEnumerationType() const; |
2365 | |
2366 | /// Return true if this is a fixed point type according to |
2367 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
2368 | bool isFixedPointType() const; |
2369 | |
2370 | /// Return true if this is a fixed point or integer type. |
2371 | bool isFixedPointOrIntegerType() const; |
2372 | |
2373 | /// Return true if this is a saturated fixed point type according to |
2374 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2375 | bool isSaturatedFixedPointType() const; |
2376 | |
2377 | /// Return true if this is a saturated fixed point type according to |
2378 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2379 | bool isUnsaturatedFixedPointType() const; |
2380 | |
2381 | /// Return true if this is a fixed point type that is signed according |
2382 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2383 | bool isSignedFixedPointType() const; |
2384 | |
2385 | /// Return true if this is a fixed point type that is unsigned according |
2386 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2387 | bool isUnsignedFixedPointType() const; |
2388 | |
2389 | /// Return true if this is not a variable sized type, |
2390 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
2391 | /// incomplete types. |
2392 | bool isConstantSizeType() const; |
2393 | |
2394 | /// Returns true if this type can be represented by some |
2395 | /// set of type specifiers. |
2396 | bool isSpecifierType() const; |
2397 | |
2398 | /// Determine the linkage of this type. |
2399 | Linkage getLinkage() const; |
2400 | |
2401 | /// Determine the visibility of this type. |
2402 | Visibility getVisibility() const { |
2403 | return getLinkageAndVisibility().getVisibility(); |
2404 | } |
2405 | |
2406 | /// Return true if the visibility was explicitly set is the code. |
2407 | bool isVisibilityExplicit() const { |
2408 | return getLinkageAndVisibility().isVisibilityExplicit(); |
2409 | } |
2410 | |
2411 | /// Determine the linkage and visibility of this type. |
2412 | LinkageInfo getLinkageAndVisibility() const; |
2413 | |
2414 | /// True if the computed linkage is valid. Used for consistency |
2415 | /// checking. Should always return true. |
2416 | bool isLinkageValid() const; |
2417 | |
2418 | /// Determine the nullability of the given type. |
2419 | /// |
2420 | /// Note that nullability is only captured as sugar within the type |
2421 | /// system, not as part of the canonical type, so nullability will |
2422 | /// be lost by canonicalization and desugaring. |
2423 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
2424 | |
2425 | /// Determine whether the given type can have a nullability |
2426 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
2427 | /// |
2428 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
2429 | /// this type can have nullability because it is dependent. |
2430 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
2431 | |
2432 | /// Retrieve the set of substitutions required when accessing a member |
2433 | /// of the Objective-C receiver type that is declared in the given context. |
2434 | /// |
2435 | /// \c *this is the type of the object we're operating on, e.g., the |
2436 | /// receiver for a message send or the base of a property access, and is |
2437 | /// expected to be of some object or object pointer type. |
2438 | /// |
2439 | /// \param dc The declaration context for which we are building up a |
2440 | /// substitution mapping, which should be an Objective-C class, extension, |
2441 | /// category, or method within. |
2442 | /// |
2443 | /// \returns an array of type arguments that can be substituted for |
2444 | /// the type parameters of the given declaration context in any type described |
2445 | /// within that context, or an empty optional to indicate that no |
2446 | /// substitution is required. |
2447 | Optional<ArrayRef<QualType>> |
2448 | getObjCSubstitutions(const DeclContext *dc) const; |
2449 | |
2450 | /// Determines if this is an ObjC interface type that may accept type |
2451 | /// parameters. |
2452 | bool acceptsObjCTypeParams() const; |
2453 | |
2454 | const char *getTypeClassName() const; |
2455 | |
2456 | QualType getCanonicalTypeInternal() const { |
2457 | return CanonicalType; |
2458 | } |
2459 | |
2460 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
2461 | void dump() const; |
2462 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
2463 | }; |
2464 | |
2465 | /// This will check for a TypedefType by removing any existing sugar |
2466 | /// until it reaches a TypedefType or a non-sugared type. |
2467 | template <> const TypedefType *Type::getAs() const; |
2468 | |
2469 | /// This will check for a TemplateSpecializationType by removing any |
2470 | /// existing sugar until it reaches a TemplateSpecializationType or a |
2471 | /// non-sugared type. |
2472 | template <> const TemplateSpecializationType *Type::getAs() const; |
2473 | |
2474 | /// This will check for an AttributedType by removing any existing sugar |
2475 | /// until it reaches an AttributedType or a non-sugared type. |
2476 | template <> const AttributedType *Type::getAs() const; |
2477 | |
2478 | // We can do canonical leaf types faster, because we don't have to |
2479 | // worry about preserving child type decoration. |
2480 | #define TYPE(Class, Base) |
2481 | #define LEAF_TYPE(Class) \ |
2482 | template <> inline const Class##Type *Type::getAs() const { \ |
2483 | return dyn_cast<Class##Type>(CanonicalType); \ |
2484 | } \ |
2485 | template <> inline const Class##Type *Type::castAs() const { \ |
2486 | return cast<Class##Type>(CanonicalType); \ |
2487 | } |
2488 | #include "clang/AST/TypeNodes.inc" |
2489 | |
2490 | /// This class is used for builtin types like 'int'. Builtin |
2491 | /// types are always canonical and have a literal name field. |
2492 | class BuiltinType : public Type { |
2493 | public: |
2494 | enum Kind { |
2495 | // OpenCL image types |
2496 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
2497 | #include "clang/Basic/OpenCLImageTypes.def" |
2498 | // OpenCL extension types |
2499 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
2500 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2501 | // SVE Types |
2502 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
2503 | #include "clang/Basic/AArch64SVEACLETypes.def" |
2504 | // PPC MMA Types |
2505 | #define PPC_VECTOR_TYPE(Name, Id, Size) Id, |
2506 | #include "clang/Basic/PPCTypes.def" |
2507 | // RVV Types |
2508 | #define RVV_TYPE(Name, Id, SingletonId) Id, |
2509 | #include "clang/Basic/RISCVVTypes.def" |
2510 | // All other builtin types |
2511 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
2512 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
2513 | #include "clang/AST/BuiltinTypes.def" |
2514 | }; |
2515 | |
2516 | private: |
2517 | friend class ASTContext; // ASTContext creates these. |
2518 | |
2519 | BuiltinType(Kind K) |
2520 | : Type(Builtin, QualType(), |
2521 | K == Dependent ? TypeDependence::DependentInstantiation |
2522 | : TypeDependence::None) { |
2523 | BuiltinTypeBits.Kind = K; |
2524 | } |
2525 | |
2526 | public: |
2527 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
2528 | StringRef getName(const PrintingPolicy &Policy) const; |
2529 | |
2530 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
2531 | // The StringRef is null-terminated. |
2532 | StringRef str = getName(Policy); |
2533 | assert(!str.empty() && str.data()[str.size()] == '\0')(static_cast <bool> (!str.empty() && str.data() [str.size()] == '\0') ? void (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 2533, __extension__ __PRETTY_FUNCTION__)); |
2534 | return str.data(); |
2535 | } |
2536 | |
2537 | bool isSugared() const { return false; } |
2538 | QualType desugar() const { return QualType(this, 0); } |
2539 | |
2540 | bool isInteger() const { |
2541 | return getKind() >= Bool && getKind() <= Int128; |
2542 | } |
2543 | |
2544 | bool isSignedInteger() const { |
2545 | return getKind() >= Char_S && getKind() <= Int128; |
2546 | } |
2547 | |
2548 | bool isUnsignedInteger() const { |
2549 | return getKind() >= Bool && getKind() <= UInt128; |
2550 | } |
2551 | |
2552 | bool isFloatingPoint() const { |
2553 | return getKind() >= Half && getKind() <= Float128; |
2554 | } |
2555 | |
2556 | /// Determines whether the given kind corresponds to a placeholder type. |
2557 | static bool isPlaceholderTypeKind(Kind K) { |
2558 | return K >= Overload; |
2559 | } |
2560 | |
2561 | /// Determines whether this type is a placeholder type, i.e. a type |
2562 | /// which cannot appear in arbitrary positions in a fully-formed |
2563 | /// expression. |
2564 | bool isPlaceholderType() const { |
2565 | return isPlaceholderTypeKind(getKind()); |
2566 | } |
2567 | |
2568 | /// Determines whether this type is a placeholder type other than |
2569 | /// Overload. Most placeholder types require only syntactic |
2570 | /// information about their context in order to be resolved (e.g. |
2571 | /// whether it is a call expression), which means they can (and |
2572 | /// should) be resolved in an earlier "phase" of analysis. |
2573 | /// Overload expressions sometimes pick up further information |
2574 | /// from their context, like whether the context expects a |
2575 | /// specific function-pointer type, and so frequently need |
2576 | /// special treatment. |
2577 | bool isNonOverloadPlaceholderType() const { |
2578 | return getKind() > Overload; |
2579 | } |
2580 | |
2581 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
2582 | }; |
2583 | |
2584 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
2585 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
2586 | class ComplexType : public Type, public llvm::FoldingSetNode { |
2587 | friend class ASTContext; // ASTContext creates these. |
2588 | |
2589 | QualType ElementType; |
2590 | |
2591 | ComplexType(QualType Element, QualType CanonicalPtr) |
2592 | : Type(Complex, CanonicalPtr, Element->getDependence()), |
2593 | ElementType(Element) {} |
2594 | |
2595 | public: |
2596 | QualType getElementType() const { return ElementType; } |
2597 | |
2598 | bool isSugared() const { return false; } |
2599 | QualType desugar() const { return QualType(this, 0); } |
2600 | |
2601 | void Profile(llvm::FoldingSetNodeID &ID) { |
2602 | Profile(ID, getElementType()); |
2603 | } |
2604 | |
2605 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
2606 | ID.AddPointer(Element.getAsOpaquePtr()); |
2607 | } |
2608 | |
2609 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
2610 | }; |
2611 | |
2612 | /// Sugar for parentheses used when specifying types. |
2613 | class ParenType : public Type, public llvm::FoldingSetNode { |
2614 | friend class ASTContext; // ASTContext creates these. |
2615 | |
2616 | QualType Inner; |
2617 | |
2618 | ParenType(QualType InnerType, QualType CanonType) |
2619 | : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {} |
2620 | |
2621 | public: |
2622 | QualType getInnerType() const { return Inner; } |
2623 | |
2624 | bool isSugared() const { return true; } |
2625 | QualType desugar() const { return getInnerType(); } |
2626 | |
2627 | void Profile(llvm::FoldingSetNodeID &ID) { |
2628 | Profile(ID, getInnerType()); |
2629 | } |
2630 | |
2631 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
2632 | Inner.Profile(ID); |
2633 | } |
2634 | |
2635 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
2636 | }; |
2637 | |
2638 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
2639 | class PointerType : public Type, public llvm::FoldingSetNode { |
2640 | friend class ASTContext; // ASTContext creates these. |
2641 | |
2642 | QualType PointeeType; |
2643 | |
2644 | PointerType(QualType Pointee, QualType CanonicalPtr) |
2645 | : Type(Pointer, CanonicalPtr, Pointee->getDependence()), |
2646 | PointeeType(Pointee) {} |
2647 | |
2648 | public: |
2649 | QualType getPointeeType() const { return PointeeType; } |
2650 | |
2651 | bool isSugared() const { return false; } |
2652 | QualType desugar() const { return QualType(this, 0); } |
2653 | |
2654 | void Profile(llvm::FoldingSetNodeID &ID) { |
2655 | Profile(ID, getPointeeType()); |
2656 | } |
2657 | |
2658 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2659 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2660 | } |
2661 | |
2662 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
2663 | }; |
2664 | |
2665 | /// Represents a type which was implicitly adjusted by the semantic |
2666 | /// engine for arbitrary reasons. For example, array and function types can |
2667 | /// decay, and function types can have their calling conventions adjusted. |
2668 | class AdjustedType : public Type, public llvm::FoldingSetNode { |
2669 | QualType OriginalTy; |
2670 | QualType AdjustedTy; |
2671 | |
2672 | protected: |
2673 | friend class ASTContext; // ASTContext creates these. |
2674 | |
2675 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, |
2676 | QualType CanonicalPtr) |
2677 | : Type(TC, CanonicalPtr, OriginalTy->getDependence()), |
2678 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} |
2679 | |
2680 | public: |
2681 | QualType getOriginalType() const { return OriginalTy; } |
2682 | QualType getAdjustedType() const { return AdjustedTy; } |
2683 | |
2684 | bool isSugared() const { return true; } |
2685 | QualType desugar() const { return AdjustedTy; } |
2686 | |
2687 | void Profile(llvm::FoldingSetNodeID &ID) { |
2688 | Profile(ID, OriginalTy, AdjustedTy); |
2689 | } |
2690 | |
2691 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { |
2692 | ID.AddPointer(Orig.getAsOpaquePtr()); |
2693 | ID.AddPointer(New.getAsOpaquePtr()); |
2694 | } |
2695 | |
2696 | static bool classof(const Type *T) { |
2697 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; |
2698 | } |
2699 | }; |
2700 | |
2701 | /// Represents a pointer type decayed from an array or function type. |
2702 | class DecayedType : public AdjustedType { |
2703 | friend class ASTContext; // ASTContext creates these. |
2704 | |
2705 | inline |
2706 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); |
2707 | |
2708 | public: |
2709 | QualType getDecayedType() const { return getAdjustedType(); } |
2710 | |
2711 | inline QualType getPointeeType() const; |
2712 | |
2713 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } |
2714 | }; |
2715 | |
2716 | /// Pointer to a block type. |
2717 | /// This type is to represent types syntactically represented as |
2718 | /// "void (^)(int)", etc. Pointee is required to always be a function type. |
2719 | class BlockPointerType : public Type, public llvm::FoldingSetNode { |
2720 | friend class ASTContext; // ASTContext creates these. |
2721 | |
2722 | // Block is some kind of pointer type |
2723 | QualType PointeeType; |
2724 | |
2725 | BlockPointerType(QualType Pointee, QualType CanonicalCls) |
2726 | : Type(BlockPointer, CanonicalCls, Pointee->getDependence()), |
2727 | PointeeType(Pointee) {} |
2728 | |
2729 | public: |
2730 | // Get the pointee type. Pointee is required to always be a function type. |
2731 | QualType getPointeeType() const { return PointeeType; } |
2732 | |
2733 | bool isSugared() const { return false; } |
2734 | QualType desugar() const { return QualType(this, 0); } |
2735 | |
2736 | void Profile(llvm::FoldingSetNodeID &ID) { |
2737 | Profile(ID, getPointeeType()); |
2738 | } |
2739 | |
2740 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2741 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2742 | } |
2743 | |
2744 | static bool classof(const Type *T) { |
2745 | return T->getTypeClass() == BlockPointer; |
2746 | } |
2747 | }; |
2748 | |
2749 | /// Base for LValueReferenceType and RValueReferenceType |
2750 | class ReferenceType : public Type, public llvm::FoldingSetNode { |
2751 | QualType PointeeType; |
2752 | |
2753 | protected: |
2754 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, |
2755 | bool SpelledAsLValue) |
2756 | : Type(tc, CanonicalRef, Referencee->getDependence()), |
2757 | PointeeType(Referencee) { |
2758 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; |
2759 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); |
2760 | } |
2761 | |
2762 | public: |
2763 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } |
2764 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } |
2765 | |
2766 | QualType getPointeeTypeAsWritten() const { return PointeeType; } |
2767 | |
2768 | QualType getPointeeType() const { |
2769 | // FIXME: this might strip inner qualifiers; okay? |
2770 | const ReferenceType *T = this; |
2771 | while (T->isInnerRef()) |
2772 | T = T->PointeeType->castAs<ReferenceType>(); |
2773 | return T->PointeeType; |
2774 | } |
2775 | |
2776 | void Profile(llvm::FoldingSetNodeID &ID) { |
2777 | Profile(ID, PointeeType, isSpelledAsLValue()); |
2778 | } |
2779 | |
2780 | static void Profile(llvm::FoldingSetNodeID &ID, |
2781 | QualType Referencee, |
2782 | bool SpelledAsLValue) { |
2783 | ID.AddPointer(Referencee.getAsOpaquePtr()); |
2784 | ID.AddBoolean(SpelledAsLValue); |
2785 | } |
2786 | |
2787 | static bool classof(const Type *T) { |
2788 | return T->getTypeClass() == LValueReference || |
2789 | T->getTypeClass() == RValueReference; |
2790 | } |
2791 | }; |
2792 | |
2793 | /// An lvalue reference type, per C++11 [dcl.ref]. |
2794 | class LValueReferenceType : public ReferenceType { |
2795 | friend class ASTContext; // ASTContext creates these |
2796 | |
2797 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, |
2798 | bool SpelledAsLValue) |
2799 | : ReferenceType(LValueReference, Referencee, CanonicalRef, |
2800 | SpelledAsLValue) {} |
2801 | |
2802 | public: |
2803 | bool isSugared() const { return false; } |
2804 | QualType desugar() const { return QualType(this, 0); } |
2805 | |
2806 | static bool classof(const Type *T) { |
2807 | return T->getTypeClass() == LValueReference; |
2808 | } |
2809 | }; |
2810 | |
2811 | /// An rvalue reference type, per C++11 [dcl.ref]. |
2812 | class RValueReferenceType : public ReferenceType { |
2813 | friend class ASTContext; // ASTContext creates these |
2814 | |
2815 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) |
2816 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} |
2817 | |
2818 | public: |
2819 | bool isSugared() const { return false; } |
2820 | QualType desugar() const { return QualType(this, 0); } |
2821 | |
2822 | static bool classof(const Type *T) { |
2823 | return T->getTypeClass() == RValueReference; |
2824 | } |
2825 | }; |
2826 | |
2827 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. |
2828 | /// |
2829 | /// This includes both pointers to data members and pointer to member functions. |
2830 | class MemberPointerType : public Type, public llvm::FoldingSetNode { |
2831 | friend class ASTContext; // ASTContext creates these. |
2832 | |
2833 | QualType PointeeType; |
2834 | |
2835 | /// The class of which the pointee is a member. Must ultimately be a |
2836 | /// RecordType, but could be a typedef or a template parameter too. |
2837 | const Type *Class; |
2838 | |
2839 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) |
2840 | : Type(MemberPointer, CanonicalPtr, |
2841 | (Cls->getDependence() & ~TypeDependence::VariablyModified) | |
2842 | Pointee->getDependence()), |
2843 | PointeeType(Pointee), Class(Cls) {} |
2844 | |
2845 | public: |
2846 | QualType getPointeeType() const { return PointeeType; } |
2847 | |
2848 | /// Returns true if the member type (i.e. the pointee type) is a |
2849 | /// function type rather than a data-member type. |
2850 | bool isMemberFunctionPointer() const { |
2851 | return PointeeType->isFunctionProtoType(); |
2852 | } |
2853 | |
2854 | /// Returns true if the member type (i.e. the pointee type) is a |
2855 | /// data type rather than a function type. |
2856 | bool isMemberDataPointer() const { |
2857 | return !PointeeType->isFunctionProtoType(); |
2858 | } |
2859 | |
2860 | const Type *getClass() const { return Class; } |
2861 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; |
2862 | |
2863 | bool isSugared() const { return false; } |
2864 | QualType desugar() const { return QualType(this, 0); } |
2865 | |
2866 | void Profile(llvm::FoldingSetNodeID &ID) { |
2867 | Profile(ID, getPointeeType(), getClass()); |
2868 | } |
2869 | |
2870 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, |
2871 | const Type *Class) { |
2872 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2873 | ID.AddPointer(Class); |
2874 | } |
2875 | |
2876 | static bool classof(const Type *T) { |
2877 | return T->getTypeClass() == MemberPointer; |
2878 | } |
2879 | }; |
2880 | |
2881 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. |
2882 | class ArrayType : public Type, public llvm::FoldingSetNode { |
2883 | public: |
2884 | /// Capture whether this is a normal array (e.g. int X[4]) |
2885 | /// an array with a static size (e.g. int X[static 4]), or an array |
2886 | /// with a star size (e.g. int X[*]). |
2887 | /// 'static' is only allowed on function parameters. |
2888 | enum ArraySizeModifier { |
2889 | Normal, Static, Star |
2890 | }; |
2891 | |
2892 | private: |
2893 | /// The element type of the array. |
2894 | QualType ElementType; |
2895 | |
2896 | protected: |
2897 | friend class ASTContext; // ASTContext creates these. |
2898 | |
2899 | ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, |
2900 | unsigned tq, const Expr *sz = nullptr); |
2901 | |
2902 | public: |
2903 | QualType getElementType() const { return ElementType; } |
2904 | |
2905 | ArraySizeModifier getSizeModifier() const { |
2906 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); |
2907 | } |
2908 | |
2909 | Qualifiers getIndexTypeQualifiers() const { |
2910 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); |
2911 | } |
2912 | |
2913 | unsigned getIndexTypeCVRQualifiers() const { |
2914 | return ArrayTypeBits.IndexTypeQuals; |
2915 | } |
2916 | |
2917 | static bool classof(const Type *T) { |
2918 | return T->getTypeClass() == ConstantArray || |
2919 | T->getTypeClass() == VariableArray || |
2920 | T->getTypeClass() == IncompleteArray || |
2921 | T->getTypeClass() == DependentSizedArray; |
2922 | } |
2923 | }; |
2924 | |
2925 | /// Represents the canonical version of C arrays with a specified constant size. |
2926 | /// For example, the canonical type for 'int A[4 + 4*100]' is a |
2927 | /// ConstantArrayType where the element type is 'int' and the size is 404. |
2928 | class ConstantArrayType final |
2929 | : public ArrayType, |
2930 | private llvm::TrailingObjects<ConstantArrayType, const Expr *> { |
2931 | friend class ASTContext; // ASTContext creates these. |
2932 | friend TrailingObjects; |
2933 | |
2934 | llvm::APInt Size; // Allows us to unique the type. |
2935 | |
2936 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, |
2937 | const Expr *sz, ArraySizeModifier sm, unsigned tq) |
2938 | : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) { |
2939 | ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr; |
2940 | if (ConstantArrayTypeBits.HasStoredSizeExpr) { |
2941 | assert(!can.isNull() && "canonical constant array should not have size")(static_cast <bool> (!can.isNull() && "canonical constant array should not have size" ) ? void (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 2941, __extension__ __PRETTY_FUNCTION__)); |
2942 | *getTrailingObjects<const Expr*>() = sz; |
2943 | } |
2944 | } |
2945 | |
2946 | unsigned numTrailingObjects(OverloadToken<const Expr*>) const { |
2947 | return ConstantArrayTypeBits.HasStoredSizeExpr; |
2948 | } |
2949 | |
2950 | public: |
2951 | const llvm::APInt &getSize() const { return Size; } |
2952 | const Expr *getSizeExpr() const { |
2953 | return ConstantArrayTypeBits.HasStoredSizeExpr |
2954 | ? *getTrailingObjects<const Expr *>() |
2955 | : nullptr; |
2956 | } |
2957 | bool isSugared() const { return false; } |
2958 | QualType desugar() const { return QualType(this, 0); } |
2959 | |
2960 | /// Determine the number of bits required to address a member of |
2961 | // an array with the given element type and number of elements. |
2962 | static unsigned getNumAddressingBits(const ASTContext &Context, |
2963 | QualType ElementType, |
2964 | const llvm::APInt &NumElements); |
2965 | |
2966 | /// Determine the maximum number of active bits that an array's size |
2967 | /// can require, which limits the maximum size of the array. |
2968 | static unsigned getMaxSizeBits(const ASTContext &Context); |
2969 | |
2970 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
2971 | Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(), |
2972 | getSizeModifier(), getIndexTypeCVRQualifiers()); |
2973 | } |
2974 | |
2975 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx, |
2976 | QualType ET, const llvm::APInt &ArraySize, |
2977 | const Expr *SizeExpr, ArraySizeModifier SizeMod, |
2978 | unsigned TypeQuals); |
2979 | |
2980 | static bool classof(const Type *T) { |
2981 | return T->getTypeClass() == ConstantArray; |
2982 | } |
2983 | }; |
2984 | |
2985 | /// Represents a C array with an unspecified size. For example 'int A[]' has |
2986 | /// an IncompleteArrayType where the element type is 'int' and the size is |
2987 | /// unspecified. |
2988 | class IncompleteArrayType : public ArrayType { |
2989 | friend class ASTContext; // ASTContext creates these. |
2990 | |
2991 | IncompleteArrayType(QualType et, QualType can, |
2992 | ArraySizeModifier sm, unsigned tq) |
2993 | : ArrayType(IncompleteArray, et, can, sm, tq) {} |
2994 | |
2995 | public: |
2996 | friend class StmtIteratorBase; |
2997 | |
2998 | bool isSugared() const { return false; } |
2999 | QualType desugar() const { return QualType(this, 0); } |
3000 | |
3001 | static bool classof(const Type *T) { |
3002 | return T->getTypeClass() == IncompleteArray; |
3003 | } |
3004 | |
3005 | void Profile(llvm::FoldingSetNodeID &ID) { |
3006 | Profile(ID, getElementType(), getSizeModifier(), |
3007 | getIndexTypeCVRQualifiers()); |
3008 | } |
3009 | |
3010 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
3011 | ArraySizeModifier SizeMod, unsigned TypeQuals) { |
3012 | ID.AddPointer(ET.getAsOpaquePtr()); |
3013 | ID.AddInteger(SizeMod); |
3014 | ID.AddInteger(TypeQuals); |
3015 | } |
3016 | }; |
3017 | |
3018 | /// Represents a C array with a specified size that is not an |
3019 | /// integer-constant-expression. For example, 'int s[x+foo()]'. |
3020 | /// Since the size expression is an arbitrary expression, we store it as such. |
3021 | /// |
3022 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and |
3023 | /// should not be: two lexically equivalent variable array types could mean |
3024 | /// different things, for example, these variables do not have the same type |
3025 | /// dynamically: |
3026 | /// |
3027 | /// void foo(int x) { |
3028 | /// int Y[x]; |
3029 | /// ++x; |
3030 | /// int Z[x]; |
3031 | /// } |
3032 | class VariableArrayType : public ArrayType { |
3033 | friend class ASTContext; // ASTContext creates these. |
3034 | |
3035 | /// An assignment-expression. VLA's are only permitted within |
3036 | /// a function block. |
3037 | Stmt *SizeExpr; |
3038 | |
3039 | /// The range spanned by the left and right array brackets. |
3040 | SourceRange Brackets; |
3041 | |
3042 | VariableArrayType(QualType et, QualType can, Expr *e, |
3043 | ArraySizeModifier sm, unsigned tq, |
3044 | SourceRange brackets) |
3045 | : ArrayType(VariableArray, et, can, sm, tq, e), |
3046 | SizeExpr((Stmt*) e), Brackets(brackets) {} |
3047 | |
3048 | public: |
3049 | friend class StmtIteratorBase; |
3050 | |
3051 | Expr *getSizeExpr() const { |
3052 | // We use C-style casts instead of cast<> here because we do not wish |
3053 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3054 | return (Expr*) SizeExpr; |
3055 | } |
3056 | |
3057 | SourceRange getBracketsRange() const { return Brackets; } |
3058 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3059 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3060 | |
3061 | bool isSugared() const { return false; } |
3062 | QualType desugar() const { return QualType(this, 0); } |
3063 | |
3064 | static bool classof(const Type *T) { |
3065 | return T->getTypeClass() == VariableArray; |
3066 | } |
3067 | |
3068 | void Profile(llvm::FoldingSetNodeID &ID) { |
3069 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3069); |
3070 | } |
3071 | }; |
3072 | |
3073 | /// Represents an array type in C++ whose size is a value-dependent expression. |
3074 | /// |
3075 | /// For example: |
3076 | /// \code |
3077 | /// template<typename T, int Size> |
3078 | /// class array { |
3079 | /// T data[Size]; |
3080 | /// }; |
3081 | /// \endcode |
3082 | /// |
3083 | /// For these types, we won't actually know what the array bound is |
3084 | /// until template instantiation occurs, at which point this will |
3085 | /// become either a ConstantArrayType or a VariableArrayType. |
3086 | class DependentSizedArrayType : public ArrayType { |
3087 | friend class ASTContext; // ASTContext creates these. |
3088 | |
3089 | const ASTContext &Context; |
3090 | |
3091 | /// An assignment expression that will instantiate to the |
3092 | /// size of the array. |
3093 | /// |
3094 | /// The expression itself might be null, in which case the array |
3095 | /// type will have its size deduced from an initializer. |
3096 | Stmt *SizeExpr; |
3097 | |
3098 | /// The range spanned by the left and right array brackets. |
3099 | SourceRange Brackets; |
3100 | |
3101 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, |
3102 | Expr *e, ArraySizeModifier sm, unsigned tq, |
3103 | SourceRange brackets); |
3104 | |
3105 | public: |
3106 | friend class StmtIteratorBase; |
3107 | |
3108 | Expr *getSizeExpr() const { |
3109 | // We use C-style casts instead of cast<> here because we do not wish |
3110 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3111 | return (Expr*) SizeExpr; |
3112 | } |
3113 | |
3114 | SourceRange getBracketsRange() const { return Brackets; } |
3115 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3116 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3117 | |
3118 | bool isSugared() const { return false; } |
3119 | QualType desugar() const { return QualType(this, 0); } |
3120 | |
3121 | static bool classof(const Type *T) { |
3122 | return T->getTypeClass() == DependentSizedArray; |
3123 | } |
3124 | |
3125 | void Profile(llvm::FoldingSetNodeID &ID) { |
3126 | Profile(ID, Context, getElementType(), |
3127 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); |
3128 | } |
3129 | |
3130 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3131 | QualType ET, ArraySizeModifier SizeMod, |
3132 | unsigned TypeQuals, Expr *E); |
3133 | }; |
3134 | |
3135 | /// Represents an extended address space qualifier where the input address space |
3136 | /// value is dependent. Non-dependent address spaces are not represented with a |
3137 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. |
3138 | /// |
3139 | /// For example: |
3140 | /// \code |
3141 | /// template<typename T, int AddrSpace> |
3142 | /// class AddressSpace { |
3143 | /// typedef T __attribute__((address_space(AddrSpace))) type; |
3144 | /// } |
3145 | /// \endcode |
3146 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { |
3147 | friend class ASTContext; |
3148 | |
3149 | const ASTContext &Context; |
3150 | Expr *AddrSpaceExpr; |
3151 | QualType PointeeType; |
3152 | SourceLocation loc; |
3153 | |
3154 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, |
3155 | QualType can, Expr *AddrSpaceExpr, |
3156 | SourceLocation loc); |
3157 | |
3158 | public: |
3159 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } |
3160 | QualType getPointeeType() const { return PointeeType; } |
3161 | SourceLocation getAttributeLoc() const { return loc; } |
3162 | |
3163 | bool isSugared() const { return false; } |
3164 | QualType desugar() const { return QualType(this, 0); } |
3165 | |
3166 | static bool classof(const Type *T) { |
3167 | return T->getTypeClass() == DependentAddressSpace; |
3168 | } |
3169 | |
3170 | void Profile(llvm::FoldingSetNodeID &ID) { |
3171 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); |
3172 | } |
3173 | |
3174 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3175 | QualType PointeeType, Expr *AddrSpaceExpr); |
3176 | }; |
3177 | |
3178 | /// Represents an extended vector type where either the type or size is |
3179 | /// dependent. |
3180 | /// |
3181 | /// For example: |
3182 | /// \code |
3183 | /// template<typename T, int Size> |
3184 | /// class vector { |
3185 | /// typedef T __attribute__((ext_vector_type(Size))) type; |
3186 | /// } |
3187 | /// \endcode |
3188 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { |
3189 | friend class ASTContext; |
3190 | |
3191 | const ASTContext &Context; |
3192 | Expr *SizeExpr; |
3193 | |
3194 | /// The element type of the array. |
3195 | QualType ElementType; |
3196 | |
3197 | SourceLocation loc; |
3198 | |
3199 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, |
3200 | QualType can, Expr *SizeExpr, SourceLocation loc); |
3201 | |
3202 | public: |
3203 | Expr *getSizeExpr() const { return SizeExpr; } |
3204 | QualType getElementType() const { return ElementType; } |
3205 | SourceLocation getAttributeLoc() const { return loc; } |
3206 | |
3207 | bool isSugared() const { return false; } |
3208 | QualType desugar() const { return QualType(this, 0); } |
3209 | |
3210 | static bool classof(const Type *T) { |
3211 | return T->getTypeClass() == DependentSizedExtVector; |
3212 | } |
3213 | |
3214 | void Profile(llvm::FoldingSetNodeID &ID) { |
3215 | Profile(ID, Context, getElementType(), getSizeExpr()); |
3216 | } |
3217 | |
3218 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3219 | QualType ElementType, Expr *SizeExpr); |
3220 | }; |
3221 | |
3222 | |
3223 | /// Represents a GCC generic vector type. This type is created using |
3224 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in |
3225 | /// bytes; or from an Altivec __vector or vector declaration. |
3226 | /// Since the constructor takes the number of vector elements, the |
3227 | /// client is responsible for converting the size into the number of elements. |
3228 | class VectorType : public Type, public llvm::FoldingSetNode { |
3229 | public: |
3230 | enum VectorKind { |
3231 | /// not a target-specific vector type |
3232 | GenericVector, |
3233 | |
3234 | /// is AltiVec vector |
3235 | AltiVecVector, |
3236 | |
3237 | /// is AltiVec 'vector Pixel' |
3238 | AltiVecPixel, |
3239 | |
3240 | /// is AltiVec 'vector bool ...' |
3241 | AltiVecBool, |
3242 | |
3243 | /// is ARM Neon vector |
3244 | NeonVector, |
3245 | |
3246 | /// is ARM Neon polynomial vector |
3247 | NeonPolyVector, |
3248 | |
3249 | /// is AArch64 SVE fixed-length data vector |
3250 | SveFixedLengthDataVector, |
3251 | |
3252 | /// is AArch64 SVE fixed-length predicate vector |
3253 | SveFixedLengthPredicateVector |
3254 | }; |
3255 | |
3256 | protected: |
3257 | friend class ASTContext; // ASTContext creates these. |
3258 | |
3259 | /// The element type of the vector. |
3260 | QualType ElementType; |
3261 | |
3262 | VectorType(QualType vecType, unsigned nElements, QualType canonType, |
3263 | VectorKind vecKind); |
3264 | |
3265 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, |
3266 | QualType canonType, VectorKind vecKind); |
3267 | |
3268 | public: |
3269 | QualType getElementType() const { return ElementType; } |
3270 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } |
3271 | |
3272 | bool isSugared() const { return false; } |
3273 | QualType desugar() const { return QualType(this, 0); } |
3274 | |
3275 | VectorKind getVectorKind() const { |
3276 | return VectorKind(VectorTypeBits.VecKind); |
3277 | } |
3278 | |
3279 | void Profile(llvm::FoldingSetNodeID &ID) { |
3280 | Profile(ID, getElementType(), getNumElements(), |
3281 | getTypeClass(), getVectorKind()); |
3282 | } |
3283 | |
3284 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3285 | unsigned NumElements, TypeClass TypeClass, |
3286 | VectorKind VecKind) { |
3287 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3288 | ID.AddInteger(NumElements); |
3289 | ID.AddInteger(TypeClass); |
3290 | ID.AddInteger(VecKind); |
3291 | } |
3292 | |
3293 | static bool classof(const Type *T) { |
3294 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; |
3295 | } |
3296 | }; |
3297 | |
3298 | /// Represents a vector type where either the type or size is dependent. |
3299 | //// |
3300 | /// For example: |
3301 | /// \code |
3302 | /// template<typename T, int Size> |
3303 | /// class vector { |
3304 | /// typedef T __attribute__((vector_size(Size))) type; |
3305 | /// } |
3306 | /// \endcode |
3307 | class DependentVectorType : public Type, public llvm::FoldingSetNode { |
3308 | friend class ASTContext; |
3309 | |
3310 | const ASTContext &Context; |
3311 | QualType ElementType; |
3312 | Expr *SizeExpr; |
3313 | SourceLocation Loc; |
3314 | |
3315 | DependentVectorType(const ASTContext &Context, QualType ElementType, |
3316 | QualType CanonType, Expr *SizeExpr, |
3317 | SourceLocation Loc, VectorType::VectorKind vecKind); |
3318 | |
3319 | public: |
3320 | Expr *getSizeExpr() const { return SizeExpr; } |
3321 | QualType getElementType() const { return ElementType; } |
3322 | SourceLocation getAttributeLoc() const { return Loc; } |
3323 | VectorType::VectorKind getVectorKind() const { |
3324 | return VectorType::VectorKind(VectorTypeBits.VecKind); |
3325 | } |
3326 | |
3327 | bool isSugared() const { return false; } |
3328 | QualType desugar() const { return QualType(this, 0); } |
3329 | |
3330 | static bool classof(const Type *T) { |
3331 | return T->getTypeClass() == DependentVector; |
3332 | } |
3333 | |
3334 | void Profile(llvm::FoldingSetNodeID &ID) { |
3335 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); |
3336 | } |
3337 | |
3338 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3339 | QualType ElementType, const Expr *SizeExpr, |
3340 | VectorType::VectorKind VecKind); |
3341 | }; |
3342 | |
3343 | /// ExtVectorType - Extended vector type. This type is created using |
3344 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. |
3345 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This |
3346 | /// class enables syntactic extensions, like Vector Components for accessing |
3347 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL |
3348 | /// Shading Language). |
3349 | class ExtVectorType : public VectorType { |
3350 | friend class ASTContext; // ASTContext creates these. |
3351 | |
3352 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) |
3353 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} |
3354 | |
3355 | public: |
3356 | static int getPointAccessorIdx(char c) { |
3357 | switch (c) { |
3358 | default: return -1; |
3359 | case 'x': case 'r': return 0; |
3360 | case 'y': case 'g': return 1; |
3361 | case 'z': case 'b': return 2; |
3362 | case 'w': case 'a': return 3; |
3363 | } |
3364 | } |
3365 | |
3366 | static int getNumericAccessorIdx(char c) { |
3367 | switch (c) { |
3368 | default: return -1; |
3369 | case '0': return 0; |
3370 | case '1': return 1; |
3371 | case '2': return 2; |
3372 | case '3': return 3; |
3373 | case '4': return 4; |
3374 | case '5': return 5; |
3375 | case '6': return 6; |
3376 | case '7': return 7; |
3377 | case '8': return 8; |
3378 | case '9': return 9; |
3379 | case 'A': |
3380 | case 'a': return 10; |
3381 | case 'B': |
3382 | case 'b': return 11; |
3383 | case 'C': |
3384 | case 'c': return 12; |
3385 | case 'D': |
3386 | case 'd': return 13; |
3387 | case 'E': |
3388 | case 'e': return 14; |
3389 | case 'F': |
3390 | case 'f': return 15; |
3391 | } |
3392 | } |
3393 | |
3394 | static int getAccessorIdx(char c, bool isNumericAccessor) { |
3395 | if (isNumericAccessor) |
3396 | return getNumericAccessorIdx(c); |
3397 | else |
3398 | return getPointAccessorIdx(c); |
3399 | } |
3400 | |
3401 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { |
3402 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) |
3403 | return unsigned(idx-1) < getNumElements(); |
3404 | return false; |
3405 | } |
3406 | |
3407 | bool isSugared() const { return false; } |
3408 | QualType desugar() const { return QualType(this, 0); } |
3409 | |
3410 | static bool classof(const Type *T) { |
3411 | return T->getTypeClass() == ExtVector; |
3412 | } |
3413 | }; |
3414 | |
3415 | /// Represents a matrix type, as defined in the Matrix Types clang extensions. |
3416 | /// __attribute__((matrix_type(rows, columns))), where "rows" specifies |
3417 | /// number of rows and "columns" specifies the number of columns. |
3418 | class MatrixType : public Type, public llvm::FoldingSetNode { |
3419 | protected: |
3420 | friend class ASTContext; |
3421 | |
3422 | /// The element type of the matrix. |
3423 | QualType ElementType; |
3424 | |
3425 | MatrixType(QualType ElementTy, QualType CanonElementTy); |
3426 | |
3427 | MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy, |
3428 | const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr); |
3429 | |
3430 | public: |
3431 | /// Returns type of the elements being stored in the matrix |
3432 | QualType getElementType() const { return ElementType; } |
3433 | |
3434 | /// Valid elements types are the following: |
3435 | /// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types |
3436 | /// and _Bool |
3437 | /// * the standard floating types float or double |
3438 | /// * a half-precision floating point type, if one is supported on the target |
3439 | static bool isValidElementType(QualType T) { |
3440 | return T->isDependentType() || |
3441 | (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType()); |
3442 | } |
3443 | |
3444 | bool isSugared() const { return false; } |
3445 | QualType desugar() const { return QualType(this, 0); } |
3446 | |
3447 | static bool classof(const Type *T) { |
3448 | return T->getTypeClass() == ConstantMatrix || |
3449 | T->getTypeClass() == DependentSizedMatrix; |
3450 | } |
3451 | }; |
3452 | |
3453 | /// Represents a concrete matrix type with constant number of rows and columns |
3454 | class ConstantMatrixType final : public MatrixType { |
3455 | protected: |
3456 | friend class ASTContext; |
3457 | |
3458 | /// Number of rows and columns. |
3459 | unsigned NumRows; |
3460 | unsigned NumColumns; |
3461 | |
3462 | static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1; |
3463 | |
3464 | ConstantMatrixType(QualType MatrixElementType, unsigned NRows, |
3465 | unsigned NColumns, QualType CanonElementType); |
3466 | |
3467 | ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows, |
3468 | unsigned NColumns, QualType CanonElementType); |
3469 | |
3470 | public: |
3471 | /// Returns the number of rows in the matrix. |
3472 | unsigned getNumRows() const { return NumRows; } |
3473 | |
3474 | /// Returns the number of columns in the matrix. |
3475 | unsigned getNumColumns() const { return NumColumns; } |
3476 | |
3477 | /// Returns the number of elements required to embed the matrix into a vector. |
3478 | unsigned getNumElementsFlattened() const { |
3479 | return getNumRows() * getNumColumns(); |
3480 | } |
3481 | |
3482 | /// Returns true if \p NumElements is a valid matrix dimension. |
3483 | static constexpr bool isDimensionValid(size_t NumElements) { |
3484 | return NumElements > 0 && NumElements <= MaxElementsPerDimension; |
3485 | } |
3486 | |
3487 | /// Returns the maximum number of elements per dimension. |
3488 | static constexpr unsigned getMaxElementsPerDimension() { |
3489 | return MaxElementsPerDimension; |
3490 | } |
3491 | |
3492 | void Profile(llvm::FoldingSetNodeID &ID) { |
3493 | Profile(ID, getElementType(), getNumRows(), getNumColumns(), |
3494 | getTypeClass()); |
3495 | } |
3496 | |
3497 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3498 | unsigned NumRows, unsigned NumColumns, |
3499 | TypeClass TypeClass) { |
3500 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3501 | ID.AddInteger(NumRows); |
3502 | ID.AddInteger(NumColumns); |
3503 | ID.AddInteger(TypeClass); |
3504 | } |
3505 | |
3506 | static bool classof(const Type *T) { |
3507 | return T->getTypeClass() == ConstantMatrix; |
3508 | } |
3509 | }; |
3510 | |
3511 | /// Represents a matrix type where the type and the number of rows and columns |
3512 | /// is dependent on a template. |
3513 | class DependentSizedMatrixType final : public MatrixType { |
3514 | friend class ASTContext; |
3515 | |
3516 | const ASTContext &Context; |
3517 | Expr *RowExpr; |
3518 | Expr *ColumnExpr; |
3519 | |
3520 | SourceLocation loc; |
3521 | |
3522 | DependentSizedMatrixType(const ASTContext &Context, QualType ElementType, |
3523 | QualType CanonicalType, Expr *RowExpr, |
3524 | Expr *ColumnExpr, SourceLocation loc); |
3525 | |
3526 | public: |
3527 | QualType getElementType() const { return ElementType; } |
3528 | Expr *getRowExpr() const { return RowExpr; } |
3529 | Expr *getColumnExpr() const { return ColumnExpr; } |
3530 | SourceLocation getAttributeLoc() const { return loc; } |
3531 | |
3532 | bool isSugared() const { return false; } |
3533 | QualType desugar() const { return QualType(this, 0); } |
3534 | |
3535 | static bool classof(const Type *T) { |
3536 | return T->getTypeClass() == DependentSizedMatrix; |
3537 | } |
3538 | |
3539 | void Profile(llvm::FoldingSetNodeID &ID) { |
3540 | Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr()); |
3541 | } |
3542 | |
3543 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3544 | QualType ElementType, Expr *RowExpr, Expr *ColumnExpr); |
3545 | }; |
3546 | |
3547 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base |
3548 | /// class of FunctionNoProtoType and FunctionProtoType. |
3549 | class FunctionType : public Type { |
3550 | // The type returned by the function. |
3551 | QualType ResultType; |
3552 | |
3553 | public: |
3554 | /// Interesting information about a specific parameter that can't simply |
3555 | /// be reflected in parameter's type. This is only used by FunctionProtoType |
3556 | /// but is in FunctionType to make this class available during the |
3557 | /// specification of the bases of FunctionProtoType. |
3558 | /// |
3559 | /// It makes sense to model language features this way when there's some |
3560 | /// sort of parameter-specific override (such as an attribute) that |
3561 | /// affects how the function is called. For example, the ARC ns_consumed |
3562 | /// attribute changes whether a parameter is passed at +0 (the default) |
3563 | /// or +1 (ns_consumed). This must be reflected in the function type, |
3564 | /// but isn't really a change to the parameter type. |
3565 | /// |
3566 | /// One serious disadvantage of modelling language features this way is |
3567 | /// that they generally do not work with language features that attempt |
3568 | /// to destructure types. For example, template argument deduction will |
3569 | /// not be able to match a parameter declared as |
3570 | /// T (*)(U) |
3571 | /// against an argument of type |
3572 | /// void (*)(__attribute__((ns_consumed)) id) |
3573 | /// because the substitution of T=void, U=id into the former will |
3574 | /// not produce the latter. |
3575 | class ExtParameterInfo { |
3576 | enum { |
3577 | ABIMask = 0x0F, |
3578 | IsConsumed = 0x10, |
3579 | HasPassObjSize = 0x20, |
3580 | IsNoEscape = 0x40, |
3581 | }; |
3582 | unsigned char Data = 0; |
3583 | |
3584 | public: |
3585 | ExtParameterInfo() = default; |
3586 | |
3587 | /// Return the ABI treatment of this parameter. |
3588 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } |
3589 | ExtParameterInfo withABI(ParameterABI kind) const { |
3590 | ExtParameterInfo copy = *this; |
3591 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); |
3592 | return copy; |
3593 | } |
3594 | |
3595 | /// Is this parameter considered "consumed" by Objective-C ARC? |
3596 | /// Consumed parameters must have retainable object type. |
3597 | bool isConsumed() const { return (Data & IsConsumed); } |
3598 | ExtParameterInfo withIsConsumed(bool consumed) const { |
3599 | ExtParameterInfo copy = *this; |
3600 | if (consumed) |
3601 | copy.Data |= IsConsumed; |
3602 | else |
3603 | copy.Data &= ~IsConsumed; |
3604 | return copy; |
3605 | } |
3606 | |
3607 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } |
3608 | ExtParameterInfo withHasPassObjectSize() const { |
3609 | ExtParameterInfo Copy = *this; |
3610 | Copy.Data |= HasPassObjSize; |
3611 | return Copy; |
3612 | } |
3613 | |
3614 | bool isNoEscape() const { return Data & IsNoEscape; } |
3615 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { |
3616 | ExtParameterInfo Copy = *this; |
3617 | if (NoEscape) |
3618 | Copy.Data |= IsNoEscape; |
3619 | else |
3620 | Copy.Data &= ~IsNoEscape; |
3621 | return Copy; |
3622 | } |
3623 | |
3624 | unsigned char getOpaqueValue() const { return Data; } |
3625 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { |
3626 | ExtParameterInfo result; |
3627 | result.Data = data; |
3628 | return result; |
3629 | } |
3630 | |
3631 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3632 | return lhs.Data == rhs.Data; |
3633 | } |
3634 | |
3635 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3636 | return lhs.Data != rhs.Data; |
3637 | } |
3638 | }; |
3639 | |
3640 | /// A class which abstracts out some details necessary for |
3641 | /// making a call. |
3642 | /// |
3643 | /// It is not actually used directly for storing this information in |
3644 | /// a FunctionType, although FunctionType does currently use the |
3645 | /// same bit-pattern. |
3646 | /// |
3647 | // If you add a field (say Foo), other than the obvious places (both, |
3648 | // constructors, compile failures), what you need to update is |
3649 | // * Operator== |
3650 | // * getFoo |
3651 | // * withFoo |
3652 | // * functionType. Add Foo, getFoo. |
3653 | // * ASTContext::getFooType |
3654 | // * ASTContext::mergeFunctionTypes |
3655 | // * FunctionNoProtoType::Profile |
3656 | // * FunctionProtoType::Profile |
3657 | // * TypePrinter::PrintFunctionProto |
3658 | // * AST read and write |
3659 | // * Codegen |
3660 | class ExtInfo { |
3661 | friend class FunctionType; |
3662 | |
3663 | // Feel free to rearrange or add bits, but if you go over 16, you'll need to |
3664 | // adjust the Bits field below, and if you add bits, you'll need to adjust |
3665 | // Type::FunctionTypeBitfields::ExtInfo as well. |
3666 | |
3667 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall| |
3668 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | 12 | |
3669 | // |
3670 | // regparm is either 0 (no regparm attribute) or the regparm value+1. |
3671 | enum { CallConvMask = 0x1F }; |
3672 | enum { NoReturnMask = 0x20 }; |
3673 | enum { ProducesResultMask = 0x40 }; |
3674 | enum { NoCallerSavedRegsMask = 0x80 }; |
3675 | enum { |
3676 | RegParmMask = 0x700, |
3677 | RegParmOffset = 8 |
3678 | }; |
3679 | enum { NoCfCheckMask = 0x800 }; |
3680 | enum { CmseNSCallMask = 0x1000 }; |
3681 | uint16_t Bits = CC_C; |
3682 | |
3683 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} |
3684 | |
3685 | public: |
3686 | // Constructor with no defaults. Use this when you know that you |
3687 | // have all the elements (when reading an AST file for example). |
3688 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, |
3689 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck, |
3690 | bool cmseNSCall) { |
3691 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(static_cast <bool> ((!hasRegParm || regParm < 7) && "Invalid regparm value") ? void (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3691, __extension__ __PRETTY_FUNCTION__)); |
3692 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | |
3693 | (producesResult ? ProducesResultMask : 0) | |
3694 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | |
3695 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | |
3696 | (NoCfCheck ? NoCfCheckMask : 0) | |
3697 | (cmseNSCall ? CmseNSCallMask : 0); |
3698 | } |
3699 | |
3700 | // Constructor with all defaults. Use when for example creating a |
3701 | // function known to use defaults. |
3702 | ExtInfo() = default; |
3703 | |
3704 | // Constructor with just the calling convention, which is an important part |
3705 | // of the canonical type. |
3706 | ExtInfo(CallingConv CC) : Bits(CC) {} |
3707 | |
3708 | bool getNoReturn() const { return Bits & NoReturnMask; } |
3709 | bool getProducesResult() const { return Bits & ProducesResultMask; } |
3710 | bool getCmseNSCall() const { return Bits & CmseNSCallMask; } |
3711 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } |
3712 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } |
3713 | bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; } |
3714 | |
3715 | unsigned getRegParm() const { |
3716 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; |
3717 | if (RegParm > 0) |
3718 | --RegParm; |
3719 | return RegParm; |
3720 | } |
3721 | |
3722 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } |
3723 | |
3724 | bool operator==(ExtInfo Other) const { |
3725 | return Bits == Other.Bits; |
3726 | } |
3727 | bool operator!=(ExtInfo Other) const { |
3728 | return Bits != Other.Bits; |
3729 | } |
3730 | |
3731 | // Note that we don't have setters. That is by design, use |
3732 | // the following with methods instead of mutating these objects. |
3733 | |
3734 | ExtInfo withNoReturn(bool noReturn) const { |
3735 | if (noReturn) |
3736 | return ExtInfo(Bits | NoReturnMask); |
3737 | else |
3738 | return ExtInfo(Bits & ~NoReturnMask); |
3739 | } |
3740 | |
3741 | ExtInfo withProducesResult(bool producesResult) const { |
3742 | if (producesResult) |
3743 | return ExtInfo(Bits | ProducesResultMask); |
3744 | else |
3745 | return ExtInfo(Bits & ~ProducesResultMask); |
3746 | } |
3747 | |
3748 | ExtInfo withCmseNSCall(bool cmseNSCall) const { |
3749 | if (cmseNSCall) |
3750 | return ExtInfo(Bits | CmseNSCallMask); |
3751 | else |
3752 | return ExtInfo(Bits & ~CmseNSCallMask); |
3753 | } |
3754 | |
3755 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { |
3756 | if (noCallerSavedRegs) |
3757 | return ExtInfo(Bits | NoCallerSavedRegsMask); |
3758 | else |
3759 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); |
3760 | } |
3761 | |
3762 | ExtInfo withNoCfCheck(bool noCfCheck) const { |
3763 | if (noCfCheck) |
3764 | return ExtInfo(Bits | NoCfCheckMask); |
3765 | else |
3766 | return ExtInfo(Bits & ~NoCfCheckMask); |
3767 | } |
3768 | |
3769 | ExtInfo withRegParm(unsigned RegParm) const { |
3770 | assert(RegParm < 7 && "Invalid regparm value")(static_cast <bool> (RegParm < 7 && "Invalid regparm value" ) ? void (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 3770, __extension__ __PRETTY_FUNCTION__)); |
3771 | return ExtInfo((Bits & ~RegParmMask) | |
3772 | ((RegParm + 1) << RegParmOffset)); |
3773 | } |
3774 | |
3775 | ExtInfo withCallingConv(CallingConv cc) const { |
3776 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); |
3777 | } |
3778 | |
3779 | void Profile(llvm::FoldingSetNodeID &ID) const { |
3780 | ID.AddInteger(Bits); |
3781 | } |
3782 | }; |
3783 | |
3784 | /// A simple holder for a QualType representing a type in an |
3785 | /// exception specification. Unfortunately needed by FunctionProtoType |
3786 | /// because TrailingObjects cannot handle repeated types. |
3787 | struct ExceptionType { QualType Type; }; |
3788 | |
3789 | /// A simple holder for various uncommon bits which do not fit in |
3790 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the |
3791 | /// alignment of subsequent objects in TrailingObjects. You must update |
3792 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. |
3793 | struct alignas(void *) FunctionTypeExtraBitfields { |
3794 | /// The number of types in the exception specification. |
3795 | /// A whole unsigned is not needed here and according to |
3796 | /// [implimits] 8 bits would be enough here. |
3797 | unsigned NumExceptionType; |
3798 | }; |
3799 | |
3800 | protected: |
3801 | FunctionType(TypeClass tc, QualType res, QualType Canonical, |
3802 | TypeDependence Dependence, ExtInfo Info) |
3803 | : Type(tc, Canonical, Dependence), ResultType(res) { |
3804 | FunctionTypeBits.ExtInfo = Info.Bits; |
3805 | } |
3806 | |
3807 | Qualifiers getFastTypeQuals() const { |
3808 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); |
3809 | } |
3810 | |
3811 | public: |
3812 | QualType getReturnType() const { return ResultType; } |
3813 | |
3814 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } |
3815 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } |
3816 | |
3817 | /// Determine whether this function type includes the GNU noreturn |
3818 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function |
3819 | /// type. |
3820 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } |
3821 | |
3822 | bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); } |
3823 | CallingConv getCallConv() const { return getExtInfo().getCC(); } |
3824 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } |
3825 | |
3826 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, |
3827 | "Const, volatile and restrict are assumed to be a subset of " |
3828 | "the fast qualifiers."); |
3829 | |
3830 | bool isConst() const { return getFastTypeQuals().hasConst(); } |
3831 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } |
3832 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } |
3833 | |
3834 | /// Determine the type of an expression that calls a function of |
3835 | /// this type. |
3836 | QualType getCallResultType(const ASTContext &Context) const { |
3837 | return getReturnType().getNonLValueExprType(Context); |
3838 | } |
3839 | |
3840 | static StringRef getNameForCallConv(CallingConv CC); |
3841 | |
3842 | static bool classof(const Type *T) { |
3843 | return T->getTypeClass() == FunctionNoProto || |
3844 | T->getTypeClass() == FunctionProto; |
3845 | } |
3846 | }; |
3847 | |
3848 | /// Represents a K&R-style 'int foo()' function, which has |
3849 | /// no information available about its arguments. |
3850 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { |
3851 | friend class ASTContext; // ASTContext creates these. |
3852 | |
3853 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) |
3854 | : FunctionType(FunctionNoProto, Result, Canonical, |
3855 | Result->getDependence() & |
3856 | ~(TypeDependence::DependentInstantiation | |
3857 | TypeDependence::UnexpandedPack), |
3858 | Info) {} |
3859 | |
3860 | public: |
3861 | // No additional state past what FunctionType provides. |
3862 | |
3863 | bool isSugared() const { return false; } |
3864 | QualType desugar() const { return QualType(this, 0); } |
3865 | |
3866 | void Profile(llvm::FoldingSetNodeID &ID) { |
3867 | Profile(ID, getReturnType(), getExtInfo()); |
3868 | } |
3869 | |
3870 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, |
3871 | ExtInfo Info) { |
3872 | Info.Profile(ID); |
3873 | ID.AddPointer(ResultType.getAsOpaquePtr()); |
3874 | } |
3875 | |
3876 | static bool classof(const Type *T) { |
3877 | return T->getTypeClass() == FunctionNoProto; |
3878 | } |
3879 | }; |
3880 | |
3881 | /// Represents a prototype with parameter type info, e.g. |
3882 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no |
3883 | /// parameters, not as having a single void parameter. Such a type can have |
3884 | /// an exception specification, but this specification is not part of the |
3885 | /// canonical type. FunctionProtoType has several trailing objects, some of |
3886 | /// which optional. For more information about the trailing objects see |
3887 | /// the first comment inside FunctionProtoType. |
3888 | class FunctionProtoType final |
3889 | : public FunctionType, |
3890 | public llvm::FoldingSetNode, |
3891 | private llvm::TrailingObjects< |
3892 | FunctionProtoType, QualType, SourceLocation, |
3893 | FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType, |
3894 | Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> { |
3895 | friend class ASTContext; // ASTContext creates these. |
3896 | friend TrailingObjects; |
3897 | |
3898 | // FunctionProtoType is followed by several trailing objects, some of |
3899 | // which optional. They are in order: |
3900 | // |
3901 | // * An array of getNumParams() QualType holding the parameter types. |
3902 | // Always present. Note that for the vast majority of FunctionProtoType, |
3903 | // these will be the only trailing objects. |
3904 | // |
3905 | // * Optionally if the function is variadic, the SourceLocation of the |
3906 | // ellipsis. |
3907 | // |
3908 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields |
3909 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): |
3910 | // a single FunctionTypeExtraBitfields. Present if and only if |
3911 | // hasExtraBitfields() is true. |
3912 | // |
3913 | // * Optionally exactly one of: |
3914 | // * an array of getNumExceptions() ExceptionType, |
3915 | // * a single Expr *, |
3916 | // * a pair of FunctionDecl *, |
3917 | // * a single FunctionDecl * |
3918 | // used to store information about the various types of exception |
3919 | // specification. See getExceptionSpecSize for the details. |
3920 | // |
3921 | // * Optionally an array of getNumParams() ExtParameterInfo holding |
3922 | // an ExtParameterInfo for each of the parameters. Present if and |
3923 | // only if hasExtParameterInfos() is true. |
3924 | // |
3925 | // * Optionally a Qualifiers object to represent extra qualifiers that can't |
3926 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only |
3927 | // if hasExtQualifiers() is true. |
3928 | // |
3929 | // The optional FunctionTypeExtraBitfields has to be before the data |
3930 | // related to the exception specification since it contains the number |
3931 | // of exception types. |
3932 | // |
3933 | // We put the ExtParameterInfos last. If all were equal, it would make |
3934 | // more sense to put these before the exception specification, because |
3935 | // it's much easier to skip past them compared to the elaborate switch |
3936 | // required to skip the exception specification. However, all is not |
3937 | // equal; ExtParameterInfos are used to model very uncommon features, |
3938 | // and it's better not to burden the more common paths. |
3939 | |
3940 | public: |
3941 | /// Holds information about the various types of exception specification. |
3942 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is |
3943 | /// used to group together the various bits of information about the |
3944 | /// exception specification. |
3945 | struct ExceptionSpecInfo { |
3946 | /// The kind of exception specification this is. |
3947 | ExceptionSpecificationType Type = EST_None; |
3948 | |
3949 | /// Explicitly-specified list of exception types. |
3950 | ArrayRef<QualType> Exceptions; |
3951 | |
3952 | /// Noexcept expression, if this is a computed noexcept specification. |
3953 | Expr *NoexceptExpr = nullptr; |
3954 | |
3955 | /// The function whose exception specification this is, for |
3956 | /// EST_Unevaluated and EST_Uninstantiated. |
3957 | FunctionDecl *SourceDecl = nullptr; |
3958 | |
3959 | /// The function template whose exception specification this is instantiated |
3960 | /// from, for EST_Uninstantiated. |
3961 | FunctionDecl *SourceTemplate = nullptr; |
3962 | |
3963 | ExceptionSpecInfo() = default; |
3964 | |
3965 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} |
3966 | }; |
3967 | |
3968 | /// Extra information about a function prototype. ExtProtoInfo is not |
3969 | /// stored as such in FunctionProtoType but is used to group together |
3970 | /// the various bits of extra information about a function prototype. |
3971 | struct ExtProtoInfo { |
3972 | FunctionType::ExtInfo ExtInfo; |
3973 | bool Variadic : 1; |
3974 | bool HasTrailingReturn : 1; |
3975 | Qualifiers TypeQuals; |
3976 | RefQualifierKind RefQualifier = RQ_None; |
3977 | ExceptionSpecInfo ExceptionSpec; |
3978 | const ExtParameterInfo *ExtParameterInfos = nullptr; |
3979 | SourceLocation EllipsisLoc; |
3980 | |
3981 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} |
3982 | |
3983 | ExtProtoInfo(CallingConv CC) |
3984 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} |
3985 | |
3986 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { |
3987 | ExtProtoInfo Result(*this); |
3988 | Result.ExceptionSpec = ESI; |
3989 | return Result; |
3990 | } |
3991 | }; |
3992 | |
3993 | private: |
3994 | unsigned numTrailingObjects(OverloadToken<QualType>) const { |
3995 | return getNumParams(); |
3996 | } |
3997 | |
3998 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { |
3999 | return isVariadic(); |
4000 | } |
4001 | |
4002 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { |
4003 | return hasExtraBitfields(); |
4004 | } |
4005 | |
4006 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { |
4007 | return getExceptionSpecSize().NumExceptionType; |
4008 | } |
4009 | |
4010 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { |
4011 | return getExceptionSpecSize().NumExprPtr; |
4012 | } |
4013 | |
4014 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { |
4015 | return getExceptionSpecSize().NumFunctionDeclPtr; |
4016 | } |
4017 | |
4018 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { |
4019 | return hasExtParameterInfos() ? getNumParams() : 0; |
4020 | } |
4021 | |
4022 | /// Determine whether there are any argument types that |
4023 | /// contain an unexpanded parameter pack. |
4024 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, |
4025 | unsigned numArgs) { |
4026 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) |
4027 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) |
4028 | return true; |
4029 | |
4030 | return false; |
4031 | } |
4032 | |
4033 | FunctionProtoType(QualType result, ArrayRef<QualType> params, |
4034 | QualType canonical, const ExtProtoInfo &epi); |
4035 | |
4036 | /// This struct is returned by getExceptionSpecSize and is used to |
4037 | /// translate an ExceptionSpecificationType to the number and kind |
4038 | /// of trailing objects related to the exception specification. |
4039 | struct ExceptionSpecSizeHolder { |
4040 | unsigned NumExceptionType; |
4041 | unsigned NumExprPtr; |
4042 | unsigned NumFunctionDeclPtr; |
4043 | }; |
4044 | |
4045 | /// Return the number and kind of trailing objects |
4046 | /// related to the exception specification. |
4047 | static ExceptionSpecSizeHolder |
4048 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { |
4049 | switch (EST) { |
4050 | case EST_None: |
4051 | case EST_DynamicNone: |
4052 | case EST_MSAny: |
4053 | case EST_BasicNoexcept: |
4054 | case EST_Unparsed: |
4055 | case EST_NoThrow: |
4056 | return {0, 0, 0}; |
4057 | |
4058 | case EST_Dynamic: |
4059 | return {NumExceptions, 0, 0}; |
4060 | |
4061 | case EST_DependentNoexcept: |
4062 | case EST_NoexceptFalse: |
4063 | case EST_NoexceptTrue: |
4064 | return {0, 1, 0}; |
4065 | |
4066 | case EST_Uninstantiated: |
4067 | return {0, 0, 2}; |
4068 | |
4069 | case EST_Unevaluated: |
4070 | return {0, 0, 1}; |
4071 | } |
4072 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4072); |
4073 | } |
4074 | |
4075 | /// Return the number and kind of trailing objects |
4076 | /// related to the exception specification. |
4077 | ExceptionSpecSizeHolder getExceptionSpecSize() const { |
4078 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); |
4079 | } |
4080 | |
4081 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4082 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { |
4083 | // If the exception spec type is EST_Dynamic then we have > 0 exception |
4084 | // types and the exact number is stored in FunctionTypeExtraBitfields. |
4085 | return EST == EST_Dynamic; |
4086 | } |
4087 | |
4088 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4089 | bool hasExtraBitfields() const { |
4090 | return hasExtraBitfields(getExceptionSpecType()); |
4091 | } |
4092 | |
4093 | bool hasExtQualifiers() const { |
4094 | return FunctionTypeBits.HasExtQuals; |
4095 | } |
4096 | |
4097 | public: |
4098 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } |
4099 | |
4100 | QualType getParamType(unsigned i) const { |
4101 | assert(i < getNumParams() && "invalid parameter index")(static_cast <bool> (i < getNumParams() && "invalid parameter index" ) ? void (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4101, __extension__ __PRETTY_FUNCTION__)); |
4102 | return param_type_begin()[i]; |
4103 | } |
4104 | |
4105 | ArrayRef<QualType> getParamTypes() const { |
4106 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); |
4107 | } |
4108 | |
4109 | ExtProtoInfo getExtProtoInfo() const { |
4110 | ExtProtoInfo EPI; |
4111 | EPI.ExtInfo = getExtInfo(); |
4112 | EPI.Variadic = isVariadic(); |
4113 | EPI.EllipsisLoc = getEllipsisLoc(); |
4114 | EPI.HasTrailingReturn = hasTrailingReturn(); |
4115 | EPI.ExceptionSpec = getExceptionSpecInfo(); |
4116 | EPI.TypeQuals = getMethodQuals(); |
4117 | EPI.RefQualifier = getRefQualifier(); |
4118 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); |
4119 | return EPI; |
4120 | } |
4121 | |
4122 | /// Get the kind of exception specification on this function. |
4123 | ExceptionSpecificationType getExceptionSpecType() const { |
4124 | return static_cast<ExceptionSpecificationType>( |
4125 | FunctionTypeBits.ExceptionSpecType); |
4126 | } |
4127 | |
4128 | /// Return whether this function has any kind of exception spec. |
4129 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } |
4130 | |
4131 | /// Return whether this function has a dynamic (throw) exception spec. |
4132 | bool hasDynamicExceptionSpec() const { |
4133 | return isDynamicExceptionSpec(getExceptionSpecType()); |
4134 | } |
4135 | |
4136 | /// Return whether this function has a noexcept exception spec. |
4137 | bool hasNoexceptExceptionSpec() const { |
4138 | return isNoexceptExceptionSpec(getExceptionSpecType()); |
4139 | } |
4140 | |
4141 | /// Return whether this function has a dependent exception spec. |
4142 | bool hasDependentExceptionSpec() const; |
4143 | |
4144 | /// Return whether this function has an instantiation-dependent exception |
4145 | /// spec. |
4146 | bool hasInstantiationDependentExceptionSpec() const; |
4147 | |
4148 | /// Return all the available information about this type's exception spec. |
4149 | ExceptionSpecInfo getExceptionSpecInfo() const { |
4150 | ExceptionSpecInfo Result; |
4151 | Result.Type = getExceptionSpecType(); |
4152 | if (Result.Type == EST_Dynamic) { |
4153 | Result.Exceptions = exceptions(); |
4154 | } else if (isComputedNoexcept(Result.Type)) { |
4155 | Result.NoexceptExpr = getNoexceptExpr(); |
4156 | } else if (Result.Type == EST_Uninstantiated) { |
4157 | Result.SourceDecl = getExceptionSpecDecl(); |
4158 | Result.SourceTemplate = getExceptionSpecTemplate(); |
4159 | } else if (Result.Type == EST_Unevaluated) { |
4160 | Result.SourceDecl = getExceptionSpecDecl(); |
4161 | } |
4162 | return Result; |
4163 | } |
4164 | |
4165 | /// Return the number of types in the exception specification. |
4166 | unsigned getNumExceptions() const { |
4167 | return getExceptionSpecType() == EST_Dynamic |
4168 | ? getTrailingObjects<FunctionTypeExtraBitfields>() |
4169 | ->NumExceptionType |
4170 | : 0; |
4171 | } |
4172 | |
4173 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). |
4174 | QualType getExceptionType(unsigned i) const { |
4175 | assert(i < getNumExceptions() && "Invalid exception number!")(static_cast <bool> (i < getNumExceptions() && "Invalid exception number!") ? void (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4175, __extension__ __PRETTY_FUNCTION__)); |
4176 | return exception_begin()[i]; |
4177 | } |
4178 | |
4179 | /// Return the expression inside noexcept(expression), or a null pointer |
4180 | /// if there is none (because the exception spec is not of this form). |
4181 | Expr *getNoexceptExpr() const { |
4182 | if (!isComputedNoexcept(getExceptionSpecType())) |
4183 | return nullptr; |
4184 | return *getTrailingObjects<Expr *>(); |
4185 | } |
4186 | |
4187 | /// If this function type has an exception specification which hasn't |
4188 | /// been determined yet (either because it has not been evaluated or because |
4189 | /// it has not been instantiated), this is the function whose exception |
4190 | /// specification is represented by this type. |
4191 | FunctionDecl *getExceptionSpecDecl() const { |
4192 | if (getExceptionSpecType() != EST_Uninstantiated && |
4193 | getExceptionSpecType() != EST_Unevaluated) |
4194 | return nullptr; |
4195 | return getTrailingObjects<FunctionDecl *>()[0]; |
4196 | } |
4197 | |
4198 | /// If this function type has an uninstantiated exception |
4199 | /// specification, this is the function whose exception specification |
4200 | /// should be instantiated to find the exception specification for |
4201 | /// this type. |
4202 | FunctionDecl *getExceptionSpecTemplate() const { |
4203 | if (getExceptionSpecType() != EST_Uninstantiated) |
4204 | return nullptr; |
4205 | return getTrailingObjects<FunctionDecl *>()[1]; |
4206 | } |
4207 | |
4208 | /// Determine whether this function type has a non-throwing exception |
4209 | /// specification. |
4210 | CanThrowResult canThrow() const; |
4211 | |
4212 | /// Determine whether this function type has a non-throwing exception |
4213 | /// specification. If this depends on template arguments, returns |
4214 | /// \c ResultIfDependent. |
4215 | bool isNothrow(bool ResultIfDependent = false) const { |
4216 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; |
4217 | } |
4218 | |
4219 | /// Whether this function prototype is variadic. |
4220 | bool isVariadic() const { return FunctionTypeBits.Variadic; } |
4221 | |
4222 | SourceLocation getEllipsisLoc() const { |
4223 | return isVariadic() ? *getTrailingObjects<SourceLocation>() |
4224 | : SourceLocation(); |
4225 | } |
4226 | |
4227 | /// Determines whether this function prototype contains a |
4228 | /// parameter pack at the end. |
4229 | /// |
4230 | /// A function template whose last parameter is a parameter pack can be |
4231 | /// called with an arbitrary number of arguments, much like a variadic |
4232 | /// function. |
4233 | bool isTemplateVariadic() const; |
4234 | |
4235 | /// Whether this function prototype has a trailing return type. |
4236 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } |
4237 | |
4238 | Qualifiers getMethodQuals() const { |
4239 | if (hasExtQualifiers()) |
4240 | return *getTrailingObjects<Qualifiers>(); |
4241 | else |
4242 | return getFastTypeQuals(); |
4243 | } |
4244 | |
4245 | /// Retrieve the ref-qualifier associated with this function type. |
4246 | RefQualifierKind getRefQualifier() const { |
4247 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); |
4248 | } |
4249 | |
4250 | using param_type_iterator = const QualType *; |
4251 | using param_type_range = llvm::iterator_range<param_type_iterator>; |
4252 | |
4253 | param_type_range param_types() const { |
4254 | return param_type_range(param_type_begin(), param_type_end()); |
4255 | } |
4256 | |
4257 | param_type_iterator param_type_begin() const { |
4258 | return getTrailingObjects<QualType>(); |
4259 | } |
4260 | |
4261 | param_type_iterator param_type_end() const { |
4262 | return param_type_begin() + getNumParams(); |
4263 | } |
4264 | |
4265 | using exception_iterator = const QualType *; |
4266 | |
4267 | ArrayRef<QualType> exceptions() const { |
4268 | return llvm::makeArrayRef(exception_begin(), exception_end()); |
4269 | } |
4270 | |
4271 | exception_iterator exception_begin() const { |
4272 | return reinterpret_cast<exception_iterator>( |
4273 | getTrailingObjects<ExceptionType>()); |
4274 | } |
4275 | |
4276 | exception_iterator exception_end() const { |
4277 | return exception_begin() + getNumExceptions(); |
4278 | } |
4279 | |
4280 | /// Is there any interesting extra information for any of the parameters |
4281 | /// of this function type? |
4282 | bool hasExtParameterInfos() const { |
4283 | return FunctionTypeBits.HasExtParameterInfos; |
4284 | } |
4285 | |
4286 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { |
4287 | assert(hasExtParameterInfos())(static_cast <bool> (hasExtParameterInfos()) ? void (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4287, __extension__ __PRETTY_FUNCTION__)); |
4288 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), |
4289 | getNumParams()); |
4290 | } |
4291 | |
4292 | /// Return a pointer to the beginning of the array of extra parameter |
4293 | /// information, if present, or else null if none of the parameters |
4294 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. |
4295 | const ExtParameterInfo *getExtParameterInfosOrNull() const { |
4296 | if (!hasExtParameterInfos()) |
4297 | return nullptr; |
4298 | return getTrailingObjects<ExtParameterInfo>(); |
4299 | } |
4300 | |
4301 | ExtParameterInfo getExtParameterInfo(unsigned I) const { |
4302 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4302, __extension__ __PRETTY_FUNCTION__)); |
4303 | if (hasExtParameterInfos()) |
4304 | return getTrailingObjects<ExtParameterInfo>()[I]; |
4305 | return ExtParameterInfo(); |
4306 | } |
4307 | |
4308 | ParameterABI getParameterABI(unsigned I) const { |
4309 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4309, __extension__ __PRETTY_FUNCTION__)); |
4310 | if (hasExtParameterInfos()) |
4311 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); |
4312 | return ParameterABI::Ordinary; |
4313 | } |
4314 | |
4315 | bool isParamConsumed(unsigned I) const { |
4316 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4316, __extension__ __PRETTY_FUNCTION__)); |
4317 | if (hasExtParameterInfos()) |
4318 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); |
4319 | return false; |
4320 | } |
4321 | |
4322 | bool isSugared() const { return false; } |
4323 | QualType desugar() const { return QualType(this, 0); } |
4324 | |
4325 | void printExceptionSpecification(raw_ostream &OS, |
4326 | const PrintingPolicy &Policy) const; |
4327 | |
4328 | static bool classof(const Type *T) { |
4329 | return T->getTypeClass() == FunctionProto; |
4330 | } |
4331 | |
4332 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); |
4333 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, |
4334 | param_type_iterator ArgTys, unsigned NumArgs, |
4335 | const ExtProtoInfo &EPI, const ASTContext &Context, |
4336 | bool Canonical); |
4337 | }; |
4338 | |
4339 | /// Represents the dependent type named by a dependently-scoped |
4340 | /// typename using declaration, e.g. |
4341 | /// using typename Base<T>::foo; |
4342 | /// |
4343 | /// Template instantiation turns these into the underlying type. |
4344 | class UnresolvedUsingType : public Type { |
4345 | friend class ASTContext; // ASTContext creates these. |
4346 | |
4347 | UnresolvedUsingTypenameDecl *Decl; |
4348 | |
4349 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) |
4350 | : Type(UnresolvedUsing, QualType(), |
4351 | TypeDependence::DependentInstantiation), |
4352 | Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {} |
4353 | |
4354 | public: |
4355 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } |
4356 | |
4357 | bool isSugared() const { return false; } |
4358 | QualType desugar() const { return QualType(this, 0); } |
4359 | |
4360 | static bool classof(const Type *T) { |
4361 | return T->getTypeClass() == UnresolvedUsing; |
4362 | } |
4363 | |
4364 | void Profile(llvm::FoldingSetNodeID &ID) { |
4365 | return Profile(ID, Decl); |
4366 | } |
4367 | |
4368 | static void Profile(llvm::FoldingSetNodeID &ID, |
4369 | UnresolvedUsingTypenameDecl *D) { |
4370 | ID.AddPointer(D); |
4371 | } |
4372 | }; |
4373 | |
4374 | class TypedefType : public Type { |
4375 | TypedefNameDecl *Decl; |
4376 | |
4377 | private: |
4378 | friend class ASTContext; // ASTContext creates these. |
4379 | |
4380 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying, |
4381 | QualType can); |
4382 | |
4383 | public: |
4384 | TypedefNameDecl *getDecl() const { return Decl; } |
4385 | |
4386 | bool isSugared() const { return true; } |
4387 | QualType desugar() const; |
4388 | |
4389 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } |
4390 | }; |
4391 | |
4392 | /// Sugar type that represents a type that was qualified by a qualifier written |
4393 | /// as a macro invocation. |
4394 | class MacroQualifiedType : public Type { |
4395 | friend class ASTContext; // ASTContext creates these. |
4396 | |
4397 | QualType UnderlyingTy; |
4398 | const IdentifierInfo *MacroII; |
4399 | |
4400 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, |
4401 | const IdentifierInfo *MacroII) |
4402 | : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()), |
4403 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { |
4404 | assert(isa<AttributedType>(UnderlyingTy) &&(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4405, __extension__ __PRETTY_FUNCTION__)) |
4405 | "Expected a macro qualified type to only wrap attributed types.")(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4405, __extension__ __PRETTY_FUNCTION__)); |
4406 | } |
4407 | |
4408 | public: |
4409 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } |
4410 | QualType getUnderlyingType() const { return UnderlyingTy; } |
4411 | |
4412 | /// Return this attributed type's modified type with no qualifiers attached to |
4413 | /// it. |
4414 | QualType getModifiedType() const; |
4415 | |
4416 | bool isSugared() const { return true; } |
4417 | QualType desugar() const; |
4418 | |
4419 | static bool classof(const Type *T) { |
4420 | return T->getTypeClass() == MacroQualified; |
4421 | } |
4422 | }; |
4423 | |
4424 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). |
4425 | class TypeOfExprType : public Type { |
4426 | Expr *TOExpr; |
4427 | |
4428 | protected: |
4429 | friend class ASTContext; // ASTContext creates these. |
4430 | |
4431 | TypeOfExprType(Expr *E, QualType can = QualType()); |
4432 | |
4433 | public: |
4434 | Expr *getUnderlyingExpr() const { return TOExpr; } |
4435 | |
4436 | /// Remove a single level of sugar. |
4437 | QualType desugar() const; |
4438 | |
4439 | /// Returns whether this type directly provides sugar. |
4440 | bool isSugared() const; |
4441 | |
4442 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } |
4443 | }; |
4444 | |
4445 | /// Internal representation of canonical, dependent |
4446 | /// `typeof(expr)` types. |
4447 | /// |
4448 | /// This class is used internally by the ASTContext to manage |
4449 | /// canonical, dependent types, only. Clients will only see instances |
4450 | /// of this class via TypeOfExprType nodes. |
4451 | class DependentTypeOfExprType |
4452 | : public TypeOfExprType, public llvm::FoldingSetNode { |
4453 | const ASTContext &Context; |
4454 | |
4455 | public: |
4456 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) |
4457 | : TypeOfExprType(E), Context(Context) {} |
4458 | |
4459 | void Profile(llvm::FoldingSetNodeID &ID) { |
4460 | Profile(ID, Context, getUnderlyingExpr()); |
4461 | } |
4462 | |
4463 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4464 | Expr *E); |
4465 | }; |
4466 | |
4467 | /// Represents `typeof(type)`, a GCC extension. |
4468 | class TypeOfType : public Type { |
4469 | friend class ASTContext; // ASTContext creates these. |
4470 | |
4471 | QualType TOType; |
4472 | |
4473 | TypeOfType(QualType T, QualType can) |
4474 | : Type(TypeOf, can, T->getDependence()), TOType(T) { |
4475 | assert(!isa<TypedefType>(can) && "Invalid canonical type")(static_cast <bool> (!isa<TypedefType>(can) && "Invalid canonical type") ? void (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4475, __extension__ __PRETTY_FUNCTION__)); |
4476 | } |
4477 | |
4478 | public: |
4479 | QualType getUnderlyingType() const { return TOType; } |
4480 | |
4481 | /// Remove a single level of sugar. |
4482 | QualType desugar() const { return getUnderlyingType(); } |
4483 | |
4484 | /// Returns whether this type directly provides sugar. |
4485 | bool isSugared() const { return true; } |
4486 | |
4487 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } |
4488 | }; |
4489 | |
4490 | /// Represents the type `decltype(expr)` (C++11). |
4491 | class DecltypeType : public Type { |
4492 | Expr *E; |
4493 | QualType UnderlyingType; |
4494 | |
4495 | protected: |
4496 | friend class ASTContext; // ASTContext creates these. |
4497 | |
4498 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); |
4499 | |
4500 | public: |
4501 | Expr *getUnderlyingExpr() const { return E; } |
4502 | QualType getUnderlyingType() const { return UnderlyingType; } |
4503 | |
4504 | /// Remove a single level of sugar. |
4505 | QualType desugar() const; |
4506 | |
4507 | /// Returns whether this type directly provides sugar. |
4508 | bool isSugared() const; |
4509 | |
4510 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } |
4511 | }; |
4512 | |
4513 | /// Internal representation of canonical, dependent |
4514 | /// decltype(expr) types. |
4515 | /// |
4516 | /// This class is used internally by the ASTContext to manage |
4517 | /// canonical, dependent types, only. Clients will only see instances |
4518 | /// of this class via DecltypeType nodes. |
4519 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { |
4520 | const ASTContext &Context; |
4521 | |
4522 | public: |
4523 | DependentDecltypeType(const ASTContext &Context, Expr *E); |
4524 | |
4525 | void Profile(llvm::FoldingSetNodeID &ID) { |
4526 | Profile(ID, Context, getUnderlyingExpr()); |
4527 | } |
4528 | |
4529 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4530 | Expr *E); |
4531 | }; |
4532 | |
4533 | /// A unary type transform, which is a type constructed from another. |
4534 | class UnaryTransformType : public Type { |
4535 | public: |
4536 | enum UTTKind { |
4537 | EnumUnderlyingType |
4538 | }; |
4539 | |
4540 | private: |
4541 | /// The untransformed type. |
4542 | QualType BaseType; |
4543 | |
4544 | /// The transformed type if not dependent, otherwise the same as BaseType. |
4545 | QualType UnderlyingType; |
4546 | |
4547 | UTTKind UKind; |
4548 | |
4549 | protected: |
4550 | friend class ASTContext; |
4551 | |
4552 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, |
4553 | QualType CanonicalTy); |
4554 | |
4555 | public: |
4556 | bool isSugared() const { return !isDependentType(); } |
4557 | QualType desugar() const { return UnderlyingType; } |
4558 | |
4559 | QualType getUnderlyingType() const { return UnderlyingType; } |
4560 | QualType getBaseType() const { return BaseType; } |
4561 | |
4562 | UTTKind getUTTKind() const { return UKind; } |
4563 | |
4564 | static bool classof(const Type *T) { |
4565 | return T->getTypeClass() == UnaryTransform; |
4566 | } |
4567 | }; |
4568 | |
4569 | /// Internal representation of canonical, dependent |
4570 | /// __underlying_type(type) types. |
4571 | /// |
4572 | /// This class is used internally by the ASTContext to manage |
4573 | /// canonical, dependent types, only. Clients will only see instances |
4574 | /// of this class via UnaryTransformType nodes. |
4575 | class DependentUnaryTransformType : public UnaryTransformType, |
4576 | public llvm::FoldingSetNode { |
4577 | public: |
4578 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, |
4579 | UTTKind UKind); |
4580 | |
4581 | void Profile(llvm::FoldingSetNodeID &ID) { |
4582 | Profile(ID, getBaseType(), getUTTKind()); |
4583 | } |
4584 | |
4585 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, |
4586 | UTTKind UKind) { |
4587 | ID.AddPointer(BaseType.getAsOpaquePtr()); |
4588 | ID.AddInteger((unsigned)UKind); |
4589 | } |
4590 | }; |
4591 | |
4592 | class TagType : public Type { |
4593 | friend class ASTReader; |
4594 | template <class T> friend class serialization::AbstractTypeReader; |
4595 | |
4596 | /// Stores the TagDecl associated with this type. The decl may point to any |
4597 | /// TagDecl that declares the entity. |
4598 | TagDecl *decl; |
4599 | |
4600 | protected: |
4601 | TagType(TypeClass TC, const TagDecl *D, QualType can); |
4602 | |
4603 | public: |
4604 | TagDecl *getDecl() const; |
4605 | |
4606 | /// Determines whether this type is in the process of being defined. |
4607 | bool isBeingDefined() const; |
4608 | |
4609 | static bool classof(const Type *T) { |
4610 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; |
4611 | } |
4612 | }; |
4613 | |
4614 | /// A helper class that allows the use of isa/cast/dyncast |
4615 | /// to detect TagType objects of structs/unions/classes. |
4616 | class RecordType : public TagType { |
4617 | protected: |
4618 | friend class ASTContext; // ASTContext creates these. |
4619 | |
4620 | explicit RecordType(const RecordDecl *D) |
4621 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4622 | explicit RecordType(TypeClass TC, RecordDecl *D) |
4623 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4624 | |
4625 | public: |
4626 | RecordDecl *getDecl() const { |
4627 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); |
4628 | } |
4629 | |
4630 | /// Recursively check all fields in the record for const-ness. If any field |
4631 | /// is declared const, return true. Otherwise, return false. |
4632 | bool hasConstFields() const; |
4633 | |
4634 | bool isSugared() const { return false; } |
4635 | QualType desugar() const { return QualType(this, 0); } |
4636 | |
4637 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } |
4638 | }; |
4639 | |
4640 | /// A helper class that allows the use of isa/cast/dyncast |
4641 | /// to detect TagType objects of enums. |
4642 | class EnumType : public TagType { |
4643 | friend class ASTContext; // ASTContext creates these. |
4644 | |
4645 | explicit EnumType(const EnumDecl *D) |
4646 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4647 | |
4648 | public: |
4649 | EnumDecl *getDecl() const { |
4650 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); |
4651 | } |
4652 | |
4653 | bool isSugared() const { return false; } |
4654 | QualType desugar() const { return QualType(this, 0); } |
4655 | |
4656 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } |
4657 | }; |
4658 | |
4659 | /// An attributed type is a type to which a type attribute has been applied. |
4660 | /// |
4661 | /// The "modified type" is the fully-sugared type to which the attributed |
4662 | /// type was applied; generally it is not canonically equivalent to the |
4663 | /// attributed type. The "equivalent type" is the minimally-desugared type |
4664 | /// which the type is canonically equivalent to. |
4665 | /// |
4666 | /// For example, in the following attributed type: |
4667 | /// int32_t __attribute__((vector_size(16))) |
4668 | /// - the modified type is the TypedefType for int32_t |
4669 | /// - the equivalent type is VectorType(16, int32_t) |
4670 | /// - the canonical type is VectorType(16, int) |
4671 | class AttributedType : public Type, public llvm::FoldingSetNode { |
4672 | public: |
4673 | using Kind = attr::Kind; |
4674 | |
4675 | private: |
4676 | friend class ASTContext; // ASTContext creates these |
4677 | |
4678 | QualType ModifiedType; |
4679 | QualType EquivalentType; |
4680 | |
4681 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, |
4682 | QualType equivalent) |
4683 | : Type(Attributed, canon, equivalent->getDependence()), |
4684 | ModifiedType(modified), EquivalentType(equivalent) { |
4685 | AttributedTypeBits.AttrKind = attrKind; |
4686 | } |
4687 | |
4688 | public: |
4689 | Kind getAttrKind() const { |
4690 | return static_cast<Kind>(AttributedTypeBits.AttrKind); |
4691 | } |
4692 | |
4693 | QualType getModifiedType() const { return ModifiedType; } |
4694 | QualType getEquivalentType() const { return EquivalentType; } |
4695 | |
4696 | bool isSugared() const { return true; } |
4697 | QualType desugar() const { return getEquivalentType(); } |
4698 | |
4699 | /// Does this attribute behave like a type qualifier? |
4700 | /// |
4701 | /// A type qualifier adjusts a type to provide specialized rules for |
4702 | /// a specific object, like the standard const and volatile qualifiers. |
4703 | /// This includes attributes controlling things like nullability, |
4704 | /// address spaces, and ARC ownership. The value of the object is still |
4705 | /// largely described by the modified type. |
4706 | /// |
4707 | /// In contrast, many type attributes "rewrite" their modified type to |
4708 | /// produce a fundamentally different type, not necessarily related in any |
4709 | /// formalizable way to the original type. For example, calling convention |
4710 | /// and vector attributes are not simple type qualifiers. |
4711 | /// |
4712 | /// Type qualifiers are often, but not always, reflected in the canonical |
4713 | /// type. |
4714 | bool isQualifier() const; |
4715 | |
4716 | bool isMSTypeSpec() const; |
4717 | |
4718 | bool isCallingConv() const; |
4719 | |
4720 | llvm::Optional<NullabilityKind> getImmediateNullability() const; |
4721 | |
4722 | /// Retrieve the attribute kind corresponding to the given |
4723 | /// nullability kind. |
4724 | static Kind getNullabilityAttrKind(NullabilityKind kind) { |
4725 | switch (kind) { |
4726 | case NullabilityKind::NonNull: |
4727 | return attr::TypeNonNull; |
4728 | |
4729 | case NullabilityKind::Nullable: |
4730 | return attr::TypeNullable; |
4731 | |
4732 | case NullabilityKind::NullableResult: |
4733 | return attr::TypeNullableResult; |
4734 | |
4735 | case NullabilityKind::Unspecified: |
4736 | return attr::TypeNullUnspecified; |
4737 | } |
4738 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 4738); |
4739 | } |
4740 | |
4741 | /// Strip off the top-level nullability annotation on the given |
4742 | /// type, if it's there. |
4743 | /// |
4744 | /// \param T The type to strip. If the type is exactly an |
4745 | /// AttributedType specifying nullability (without looking through |
4746 | /// type sugar), the nullability is returned and this type changed |
4747 | /// to the underlying modified type. |
4748 | /// |
4749 | /// \returns the top-level nullability, if present. |
4750 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); |
4751 | |
4752 | void Profile(llvm::FoldingSetNodeID &ID) { |
4753 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); |
4754 | } |
4755 | |
4756 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, |
4757 | QualType modified, QualType equivalent) { |
4758 | ID.AddInteger(attrKind); |
4759 | ID.AddPointer(modified.getAsOpaquePtr()); |
4760 | ID.AddPointer(equivalent.getAsOpaquePtr()); |
4761 | } |
4762 | |
4763 | static bool classof(const Type *T) { |
4764 | return T->getTypeClass() == Attributed; |
4765 | } |
4766 | }; |
4767 | |
4768 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4769 | friend class ASTContext; // ASTContext creates these |
4770 | |
4771 | // Helper data collector for canonical types. |
4772 | struct CanonicalTTPTInfo { |
4773 | unsigned Depth : 15; |
4774 | unsigned ParameterPack : 1; |
4775 | unsigned Index : 16; |
4776 | }; |
4777 | |
4778 | union { |
4779 | // Info for the canonical type. |
4780 | CanonicalTTPTInfo CanTTPTInfo; |
4781 | |
4782 | // Info for the non-canonical type. |
4783 | TemplateTypeParmDecl *TTPDecl; |
4784 | }; |
4785 | |
4786 | /// Build a non-canonical type. |
4787 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) |
4788 | : Type(TemplateTypeParm, Canon, |
4789 | TypeDependence::DependentInstantiation | |
4790 | (Canon->getDependence() & TypeDependence::UnexpandedPack)), |
4791 | TTPDecl(TTPDecl) {} |
4792 | |
4793 | /// Build the canonical type. |
4794 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) |
4795 | : Type(TemplateTypeParm, QualType(this, 0), |
4796 | TypeDependence::DependentInstantiation | |
4797 | (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) { |
4798 | CanTTPTInfo.Depth = D; |
4799 | CanTTPTInfo.Index = I; |
4800 | CanTTPTInfo.ParameterPack = PP; |
4801 | } |
4802 | |
4803 | const CanonicalTTPTInfo& getCanTTPTInfo() const { |
4804 | QualType Can = getCanonicalTypeInternal(); |
4805 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; |
4806 | } |
4807 | |
4808 | public: |
4809 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } |
4810 | unsigned getIndex() const { return getCanTTPTInfo().Index; } |
4811 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } |
4812 | |
4813 | TemplateTypeParmDecl *getDecl() const { |
4814 | return isCanonicalUnqualified() ? nullptr : TTPDecl; |
4815 | } |
4816 | |
4817 | IdentifierInfo *getIdentifier() const; |
4818 | |
4819 | bool isSugared() const { return false; } |
4820 | QualType desugar() const { return QualType(this, 0); } |
4821 | |
4822 | void Profile(llvm::FoldingSetNodeID &ID) { |
4823 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); |
4824 | } |
4825 | |
4826 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, |
4827 | unsigned Index, bool ParameterPack, |
4828 | TemplateTypeParmDecl *TTPDecl) { |
4829 | ID.AddInteger(Depth); |
4830 | ID.AddInteger(Index); |
4831 | ID.AddBoolean(ParameterPack); |
4832 | ID.AddPointer(TTPDecl); |
4833 | } |
4834 | |
4835 | static bool classof(const Type *T) { |
4836 | return T->getTypeClass() == TemplateTypeParm; |
4837 | } |
4838 | }; |
4839 | |
4840 | /// Represents the result of substituting a type for a template |
4841 | /// type parameter. |
4842 | /// |
4843 | /// Within an instantiated template, all template type parameters have |
4844 | /// been replaced with these. They are used solely to record that a |
4845 | /// type was originally written as a template type parameter; |
4846 | /// therefore they are never canonical. |
4847 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4848 | friend class ASTContext; |
4849 | |
4850 | // The original type parameter. |
4851 | const TemplateTypeParmType *Replaced; |
4852 | |
4853 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) |
4854 | : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()), |
4855 | Replaced(Param) {} |
4856 | |
4857 | public: |
4858 | /// Gets the template parameter that was substituted for. |
4859 | const TemplateTypeParmType *getReplacedParameter() const { |
4860 | return Replaced; |
4861 | } |
4862 | |
4863 | /// Gets the type that was substituted for the template |
4864 | /// parameter. |
4865 | QualType getReplacementType() const { |
4866 | return getCanonicalTypeInternal(); |
4867 | } |
4868 | |
4869 | bool isSugared() const { return true; } |
4870 | QualType desugar() const { return getReplacementType(); } |
4871 | |
4872 | void Profile(llvm::FoldingSetNodeID &ID) { |
4873 | Profile(ID, getReplacedParameter(), getReplacementType()); |
4874 | } |
4875 | |
4876 | static void Profile(llvm::FoldingSetNodeID &ID, |
4877 | const TemplateTypeParmType *Replaced, |
4878 | QualType Replacement) { |
4879 | ID.AddPointer(Replaced); |
4880 | ID.AddPointer(Replacement.getAsOpaquePtr()); |
4881 | } |
4882 | |
4883 | static bool classof(const Type *T) { |
4884 | return T->getTypeClass() == SubstTemplateTypeParm; |
4885 | } |
4886 | }; |
4887 | |
4888 | /// Represents the result of substituting a set of types for a template |
4889 | /// type parameter pack. |
4890 | /// |
4891 | /// When a pack expansion in the source code contains multiple parameter packs |
4892 | /// and those parameter packs correspond to different levels of template |
4893 | /// parameter lists, this type node is used to represent a template type |
4894 | /// parameter pack from an outer level, which has already had its argument pack |
4895 | /// substituted but that still lives within a pack expansion that itself |
4896 | /// could not be instantiated. When actually performing a substitution into |
4897 | /// that pack expansion (e.g., when all template parameters have corresponding |
4898 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType |
4899 | /// at the current pack substitution index. |
4900 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { |
4901 | friend class ASTContext; |
4902 | |
4903 | /// The original type parameter. |
4904 | const TemplateTypeParmType *Replaced; |
4905 | |
4906 | /// A pointer to the set of template arguments that this |
4907 | /// parameter pack is instantiated with. |
4908 | const TemplateArgument *Arguments; |
4909 | |
4910 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, |
4911 | QualType Canon, |
4912 | const TemplateArgument &ArgPack); |
4913 | |
4914 | public: |
4915 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } |
4916 | |
4917 | /// Gets the template parameter that was substituted for. |
4918 | const TemplateTypeParmType *getReplacedParameter() const { |
4919 | return Replaced; |
4920 | } |
4921 | |
4922 | unsigned getNumArgs() const { |
4923 | return SubstTemplateTypeParmPackTypeBits.NumArgs; |
4924 | } |
4925 | |
4926 | bool isSugared() const { return false; } |
4927 | QualType desugar() const { return QualType(this, 0); } |
4928 | |
4929 | TemplateArgument getArgumentPack() const; |
4930 | |
4931 | void Profile(llvm::FoldingSetNodeID &ID); |
4932 | static void Profile(llvm::FoldingSetNodeID &ID, |
4933 | const TemplateTypeParmType *Replaced, |
4934 | const TemplateArgument &ArgPack); |
4935 | |
4936 | static bool classof(const Type *T) { |
4937 | return T->getTypeClass() == SubstTemplateTypeParmPack; |
4938 | } |
4939 | }; |
4940 | |
4941 | /// Common base class for placeholders for types that get replaced by |
4942 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced |
4943 | /// class template types, and constrained type names. |
4944 | /// |
4945 | /// These types are usually a placeholder for a deduced type. However, before |
4946 | /// the initializer is attached, or (usually) if the initializer is |
4947 | /// type-dependent, there is no deduced type and the type is canonical. In |
4948 | /// the latter case, it is also a dependent type. |
4949 | class DeducedType : public Type { |
4950 | protected: |
4951 | DeducedType(TypeClass TC, QualType DeducedAsType, |
4952 | TypeDependence ExtraDependence) |
4953 | : Type(TC, |
4954 | // FIXME: Retain the sugared deduced type? |
4955 | DeducedAsType.isNull() ? QualType(this, 0) |
4956 | : DeducedAsType.getCanonicalType(), |
4957 | ExtraDependence | (DeducedAsType.isNull() |
4958 | ? TypeDependence::None |
4959 | : DeducedAsType->getDependence() & |
4960 | ~TypeDependence::VariablyModified)) {} |
4961 | |
4962 | public: |
4963 | bool isSugared() const { return !isCanonicalUnqualified(); } |
4964 | QualType desugar() const { return getCanonicalTypeInternal(); } |
4965 | |
4966 | /// Get the type deduced for this placeholder type, or null if it's |
4967 | /// either not been deduced or was deduced to a dependent type. |
4968 | QualType getDeducedType() const { |
4969 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); |
4970 | } |
4971 | bool isDeduced() const { |
4972 | return !isCanonicalUnqualified() || isDependentType(); |
4973 | } |
4974 | |
4975 | static bool classof(const Type *T) { |
4976 | return T->getTypeClass() == Auto || |
4977 | T->getTypeClass() == DeducedTemplateSpecialization; |
4978 | } |
4979 | }; |
4980 | |
4981 | /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained |
4982 | /// by a type-constraint. |
4983 | class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode { |
4984 | friend class ASTContext; // ASTContext creates these |
4985 | |
4986 | ConceptDecl *TypeConstraintConcept; |
4987 | |
4988 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, |
4989 | TypeDependence ExtraDependence, ConceptDecl *CD, |
4990 | ArrayRef<TemplateArgument> TypeConstraintArgs); |
4991 | |
4992 | const TemplateArgument *getArgBuffer() const { |
4993 | return reinterpret_cast<const TemplateArgument*>(this+1); |
4994 | } |
4995 | |
4996 | TemplateArgument *getArgBuffer() { |
4997 | return reinterpret_cast<TemplateArgument*>(this+1); |
4998 | } |
4999 | |
5000 | public: |
5001 | /// Retrieve the template arguments. |
5002 | const TemplateArgument *getArgs() const { |
5003 | return getArgBuffer(); |
5004 | } |
5005 | |
5006 | /// Retrieve the number of template arguments. |
5007 | unsigned getNumArgs() const { |
5008 | return AutoTypeBits.NumArgs; |
5009 | } |
5010 | |
5011 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5012 | |
5013 | ArrayRef<TemplateArgument> getTypeConstraintArguments() const { |
5014 | return {getArgs(), getNumArgs()}; |
5015 | } |
5016 | |
5017 | ConceptDecl *getTypeConstraintConcept() const { |
5018 | return TypeConstraintConcept; |
5019 | } |
5020 | |
5021 | bool isConstrained() const { |
5022 | return TypeConstraintConcept != nullptr; |
5023 | } |
5024 | |
5025 | bool isDecltypeAuto() const { |
5026 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; |
5027 | } |
5028 | |
5029 | AutoTypeKeyword getKeyword() const { |
5030 | return (AutoTypeKeyword)AutoTypeBits.Keyword; |
5031 | } |
5032 | |
5033 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5034 | Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(), |
5035 | getTypeConstraintConcept(), getTypeConstraintArguments()); |
5036 | } |
5037 | |
5038 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
5039 | QualType Deduced, AutoTypeKeyword Keyword, |
5040 | bool IsDependent, ConceptDecl *CD, |
5041 | ArrayRef<TemplateArgument> Arguments); |
5042 | |
5043 | static bool classof(const Type *T) { |
5044 | return T->getTypeClass() == Auto; |
5045 | } |
5046 | }; |
5047 | |
5048 | /// Represents a C++17 deduced template specialization type. |
5049 | class DeducedTemplateSpecializationType : public DeducedType, |
5050 | public llvm::FoldingSetNode { |
5051 | friend class ASTContext; // ASTContext creates these |
5052 | |
5053 | /// The name of the template whose arguments will be deduced. |
5054 | TemplateName Template; |
5055 | |
5056 | DeducedTemplateSpecializationType(TemplateName Template, |
5057 | QualType DeducedAsType, |
5058 | bool IsDeducedAsDependent) |
5059 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, |
5060 | toTypeDependence(Template.getDependence()) | |
5061 | (IsDeducedAsDependent |
5062 | ? TypeDependence::DependentInstantiation |
5063 | : TypeDependence::None)), |
5064 | Template(Template) {} |
5065 | |
5066 | public: |
5067 | /// Retrieve the name of the template that we are deducing. |
5068 | TemplateName getTemplateName() const { return Template;} |
5069 | |
5070 | void Profile(llvm::FoldingSetNodeID &ID) { |
5071 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); |
5072 | } |
5073 | |
5074 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, |
5075 | QualType Deduced, bool IsDependent) { |
5076 | Template.Profile(ID); |
5077 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
5078 | ID.AddBoolean(IsDependent); |
5079 | } |
5080 | |
5081 | static bool classof(const Type *T) { |
5082 | return T->getTypeClass() == DeducedTemplateSpecialization; |
5083 | } |
5084 | }; |
5085 | |
5086 | /// Represents a type template specialization; the template |
5087 | /// must be a class template, a type alias template, or a template |
5088 | /// template parameter. A template which cannot be resolved to one of |
5089 | /// these, e.g. because it is written with a dependent scope |
5090 | /// specifier, is instead represented as a |
5091 | /// @c DependentTemplateSpecializationType. |
5092 | /// |
5093 | /// A non-dependent template specialization type is always "sugar", |
5094 | /// typically for a \c RecordType. For example, a class template |
5095 | /// specialization type of \c vector<int> will refer to a tag type for |
5096 | /// the instantiation \c std::vector<int, std::allocator<int>> |
5097 | /// |
5098 | /// Template specializations are dependent if either the template or |
5099 | /// any of the template arguments are dependent, in which case the |
5100 | /// type may also be canonical. |
5101 | /// |
5102 | /// Instances of this type are allocated with a trailing array of |
5103 | /// TemplateArguments, followed by a QualType representing the |
5104 | /// non-canonical aliased type when the template is a type alias |
5105 | /// template. |
5106 | class alignas(8) TemplateSpecializationType |
5107 | : public Type, |
5108 | public llvm::FoldingSetNode { |
5109 | friend class ASTContext; // ASTContext creates these |
5110 | |
5111 | /// The name of the template being specialized. This is |
5112 | /// either a TemplateName::Template (in which case it is a |
5113 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a |
5114 | /// TypeAliasTemplateDecl*), a |
5115 | /// TemplateName::SubstTemplateTemplateParmPack, or a |
5116 | /// TemplateName::SubstTemplateTemplateParm (in which case the |
5117 | /// replacement must, recursively, be one of these). |
5118 | TemplateName Template; |
5119 | |
5120 | TemplateSpecializationType(TemplateName T, |
5121 | ArrayRef<TemplateArgument> Args, |
5122 | QualType Canon, |
5123 | QualType Aliased); |
5124 | |
5125 | public: |
5126 | /// Determine whether any of the given template arguments are dependent. |
5127 | /// |
5128 | /// The converted arguments should be supplied when known; whether an |
5129 | /// argument is dependent can depend on the conversions performed on it |
5130 | /// (for example, a 'const int' passed as a template argument might be |
5131 | /// dependent if the parameter is a reference but non-dependent if the |
5132 | /// parameter is an int). |
5133 | /// |
5134 | /// Note that the \p Args parameter is unused: this is intentional, to remind |
5135 | /// the caller that they need to pass in the converted arguments, not the |
5136 | /// specified arguments. |
5137 | static bool |
5138 | anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, |
5139 | ArrayRef<TemplateArgument> Converted); |
5140 | static bool |
5141 | anyDependentTemplateArguments(const TemplateArgumentListInfo &, |
5142 | ArrayRef<TemplateArgument> Converted); |
5143 | static bool anyInstantiationDependentTemplateArguments( |
5144 | ArrayRef<TemplateArgumentLoc> Args); |
5145 | |
5146 | /// True if this template specialization type matches a current |
5147 | /// instantiation in the context in which it is found. |
5148 | bool isCurrentInstantiation() const { |
5149 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); |
5150 | } |
5151 | |
5152 | /// Determine if this template specialization type is for a type alias |
5153 | /// template that has been substituted. |
5154 | /// |
5155 | /// Nearly every template specialization type whose template is an alias |
5156 | /// template will be substituted. However, this is not the case when |
5157 | /// the specialization contains a pack expansion but the template alias |
5158 | /// does not have a corresponding parameter pack, e.g., |
5159 | /// |
5160 | /// \code |
5161 | /// template<typename T, typename U, typename V> struct S; |
5162 | /// template<typename T, typename U> using A = S<T, int, U>; |
5163 | /// template<typename... Ts> struct X { |
5164 | /// typedef A<Ts...> type; // not a type alias |
5165 | /// }; |
5166 | /// \endcode |
5167 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } |
5168 | |
5169 | /// Get the aliased type, if this is a specialization of a type alias |
5170 | /// template. |
5171 | QualType getAliasedType() const { |
5172 | assert(isTypeAlias() && "not a type alias template specialization")(static_cast <bool> (isTypeAlias() && "not a type alias template specialization" ) ? void (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5172, __extension__ __PRETTY_FUNCTION__)); |
5173 | return *reinterpret_cast<const QualType*>(end()); |
5174 | } |
5175 | |
5176 | using iterator = const TemplateArgument *; |
5177 | |
5178 | iterator begin() const { return getArgs(); } |
5179 | iterator end() const; // defined inline in TemplateBase.h |
5180 | |
5181 | /// Retrieve the name of the template that we are specializing. |
5182 | TemplateName getTemplateName() const { return Template; } |
5183 | |
5184 | /// Retrieve the template arguments. |
5185 | const TemplateArgument *getArgs() const { |
5186 | return reinterpret_cast<const TemplateArgument *>(this + 1); |
5187 | } |
5188 | |
5189 | /// Retrieve the number of template arguments. |
5190 | unsigned getNumArgs() const { |
5191 | return TemplateSpecializationTypeBits.NumArgs; |
5192 | } |
5193 | |
5194 | /// Retrieve a specific template argument as a type. |
5195 | /// \pre \c isArgType(Arg) |
5196 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5197 | |
5198 | ArrayRef<TemplateArgument> template_arguments() const { |
5199 | return {getArgs(), getNumArgs()}; |
5200 | } |
5201 | |
5202 | bool isSugared() const { |
5203 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); |
5204 | } |
5205 | |
5206 | QualType desugar() const { |
5207 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); |
5208 | } |
5209 | |
5210 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
5211 | Profile(ID, Template, template_arguments(), Ctx); |
5212 | if (isTypeAlias()) |
5213 | getAliasedType().Profile(ID); |
5214 | } |
5215 | |
5216 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, |
5217 | ArrayRef<TemplateArgument> Args, |
5218 | const ASTContext &Context); |
5219 | |
5220 | static bool classof(const Type *T) { |
5221 | return T->getTypeClass() == TemplateSpecialization; |
5222 | } |
5223 | }; |
5224 | |
5225 | /// Print a template argument list, including the '<' and '>' |
5226 | /// enclosing the template arguments. |
5227 | void printTemplateArgumentList(raw_ostream &OS, |
5228 | ArrayRef<TemplateArgument> Args, |
5229 | const PrintingPolicy &Policy, |
5230 | const TemplateParameterList *TPL = nullptr); |
5231 | |
5232 | void printTemplateArgumentList(raw_ostream &OS, |
5233 | ArrayRef<TemplateArgumentLoc> Args, |
5234 | const PrintingPolicy &Policy, |
5235 | const TemplateParameterList *TPL = nullptr); |
5236 | |
5237 | void printTemplateArgumentList(raw_ostream &OS, |
5238 | const TemplateArgumentListInfo &Args, |
5239 | const PrintingPolicy &Policy, |
5240 | const TemplateParameterList *TPL = nullptr); |
5241 | |
5242 | /// The injected class name of a C++ class template or class |
5243 | /// template partial specialization. Used to record that a type was |
5244 | /// spelled with a bare identifier rather than as a template-id; the |
5245 | /// equivalent for non-templated classes is just RecordType. |
5246 | /// |
5247 | /// Injected class name types are always dependent. Template |
5248 | /// instantiation turns these into RecordTypes. |
5249 | /// |
5250 | /// Injected class name types are always canonical. This works |
5251 | /// because it is impossible to compare an injected class name type |
5252 | /// with the corresponding non-injected template type, for the same |
5253 | /// reason that it is impossible to directly compare template |
5254 | /// parameters from different dependent contexts: injected class name |
5255 | /// types can only occur within the scope of a particular templated |
5256 | /// declaration, and within that scope every template specialization |
5257 | /// will canonicalize to the injected class name (when appropriate |
5258 | /// according to the rules of the language). |
5259 | class InjectedClassNameType : public Type { |
5260 | friend class ASTContext; // ASTContext creates these. |
5261 | friend class ASTNodeImporter; |
5262 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not |
5263 | // currently suitable for AST reading, too much |
5264 | // interdependencies. |
5265 | template <class T> friend class serialization::AbstractTypeReader; |
5266 | |
5267 | CXXRecordDecl *Decl; |
5268 | |
5269 | /// The template specialization which this type represents. |
5270 | /// For example, in |
5271 | /// template <class T> class A { ... }; |
5272 | /// this is A<T>, whereas in |
5273 | /// template <class X, class Y> class A<B<X,Y> > { ... }; |
5274 | /// this is A<B<X,Y> >. |
5275 | /// |
5276 | /// It is always unqualified, always a template specialization type, |
5277 | /// and always dependent. |
5278 | QualType InjectedType; |
5279 | |
5280 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) |
5281 | : Type(InjectedClassName, QualType(), |
5282 | TypeDependence::DependentInstantiation), |
5283 | Decl(D), InjectedType(TST) { |
5284 | assert(isa<TemplateSpecializationType>(TST))(static_cast <bool> (isa<TemplateSpecializationType> (TST)) ? void (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5284, __extension__ __PRETTY_FUNCTION__)); |
5285 | assert(!TST.hasQualifiers())(static_cast <bool> (!TST.hasQualifiers()) ? void (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5285, __extension__ __PRETTY_FUNCTION__)); |
5286 | assert(TST->isDependentType())(static_cast <bool> (TST->isDependentType()) ? void ( 0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5286, __extension__ __PRETTY_FUNCTION__)); |
5287 | } |
5288 | |
5289 | public: |
5290 | QualType getInjectedSpecializationType() const { return InjectedType; } |
5291 | |
5292 | const TemplateSpecializationType *getInjectedTST() const { |
5293 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); |
5294 | } |
5295 | |
5296 | TemplateName getTemplateName() const { |
5297 | return getInjectedTST()->getTemplateName(); |
5298 | } |
5299 | |
5300 | CXXRecordDecl *getDecl() const; |
5301 | |
5302 | bool isSugared() const { return false; } |
5303 | QualType desugar() const { return QualType(this, 0); } |
5304 | |
5305 | static bool classof(const Type *T) { |
5306 | return T->getTypeClass() == InjectedClassName; |
5307 | } |
5308 | }; |
5309 | |
5310 | /// The kind of a tag type. |
5311 | enum TagTypeKind { |
5312 | /// The "struct" keyword. |
5313 | TTK_Struct, |
5314 | |
5315 | /// The "__interface" keyword. |
5316 | TTK_Interface, |
5317 | |
5318 | /// The "union" keyword. |
5319 | TTK_Union, |
5320 | |
5321 | /// The "class" keyword. |
5322 | TTK_Class, |
5323 | |
5324 | /// The "enum" keyword. |
5325 | TTK_Enum |
5326 | }; |
5327 | |
5328 | /// The elaboration keyword that precedes a qualified type name or |
5329 | /// introduces an elaborated-type-specifier. |
5330 | enum ElaboratedTypeKeyword { |
5331 | /// The "struct" keyword introduces the elaborated-type-specifier. |
5332 | ETK_Struct, |
5333 | |
5334 | /// The "__interface" keyword introduces the elaborated-type-specifier. |
5335 | ETK_Interface, |
5336 | |
5337 | /// The "union" keyword introduces the elaborated-type-specifier. |
5338 | ETK_Union, |
5339 | |
5340 | /// The "class" keyword introduces the elaborated-type-specifier. |
5341 | ETK_Class, |
5342 | |
5343 | /// The "enum" keyword introduces the elaborated-type-specifier. |
5344 | ETK_Enum, |
5345 | |
5346 | /// The "typename" keyword precedes the qualified type name, e.g., |
5347 | /// \c typename T::type. |
5348 | ETK_Typename, |
5349 | |
5350 | /// No keyword precedes the qualified type name. |
5351 | ETK_None |
5352 | }; |
5353 | |
5354 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. |
5355 | /// The keyword in stored in the free bits of the base class. |
5356 | /// Also provides a few static helpers for converting and printing |
5357 | /// elaborated type keyword and tag type kind enumerations. |
5358 | class TypeWithKeyword : public Type { |
5359 | protected: |
5360 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, |
5361 | QualType Canonical, TypeDependence Dependence) |
5362 | : Type(tc, Canonical, Dependence) { |
5363 | TypeWithKeywordBits.Keyword = Keyword; |
5364 | } |
5365 | |
5366 | public: |
5367 | ElaboratedTypeKeyword getKeyword() const { |
5368 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); |
5369 | } |
5370 | |
5371 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. |
5372 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); |
5373 | |
5374 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. |
5375 | /// It is an error to provide a type specifier which *isn't* a tag kind here. |
5376 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); |
5377 | |
5378 | /// Converts a TagTypeKind into an elaborated type keyword. |
5379 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); |
5380 | |
5381 | /// Converts an elaborated type keyword into a TagTypeKind. |
5382 | /// It is an error to provide an elaborated type keyword |
5383 | /// which *isn't* a tag kind here. |
5384 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); |
5385 | |
5386 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); |
5387 | |
5388 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); |
5389 | |
5390 | static StringRef getTagTypeKindName(TagTypeKind Kind) { |
5391 | return getKeywordName(getKeywordForTagTypeKind(Kind)); |
5392 | } |
5393 | |
5394 | class CannotCastToThisType {}; |
5395 | static CannotCastToThisType classof(const Type *); |
5396 | }; |
5397 | |
5398 | /// Represents a type that was referred to using an elaborated type |
5399 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, |
5400 | /// or both. |
5401 | /// |
5402 | /// This type is used to keep track of a type name as written in the |
5403 | /// source code, including tag keywords and any nested-name-specifiers. |
5404 | /// The type itself is always "sugar", used to express what was written |
5405 | /// in the source code but containing no additional semantic information. |
5406 | class ElaboratedType final |
5407 | : public TypeWithKeyword, |
5408 | public llvm::FoldingSetNode, |
5409 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { |
5410 | friend class ASTContext; // ASTContext creates these |
5411 | friend TrailingObjects; |
5412 | |
5413 | /// The nested name specifier containing the qualifier. |
5414 | NestedNameSpecifier *NNS; |
5415 | |
5416 | /// The type that this qualified name refers to. |
5417 | QualType NamedType; |
5418 | |
5419 | /// The (re)declaration of this tag type owned by this occurrence is stored |
5420 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain |
5421 | /// it, or obtain a null pointer if there is none. |
5422 | |
5423 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5424 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) |
5425 | : TypeWithKeyword(Keyword, Elaborated, CanonType, |
5426 | // Any semantic dependence on the qualifier will have |
5427 | // been incorporated into NamedType. We still need to |
5428 | // track syntactic (instantiation / error / pack) |
5429 | // dependence on the qualifier. |
5430 | NamedType->getDependence() | |
5431 | (NNS ? toSyntacticDependence( |
5432 | toTypeDependence(NNS->getDependence())) |
5433 | : TypeDependence::None)), |
5434 | NNS(NNS), NamedType(NamedType) { |
5435 | ElaboratedTypeBits.HasOwnedTagDecl = false; |
5436 | if (OwnedTagDecl) { |
5437 | ElaboratedTypeBits.HasOwnedTagDecl = true; |
5438 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; |
5439 | } |
5440 | assert(!(Keyword == ETK_None && NNS == nullptr) &&(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)) |
5441 | "ElaboratedType cannot have elaborated type keyword "(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)) |
5442 | "and name qualifier both null.")(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5442, __extension__ __PRETTY_FUNCTION__)); |
5443 | } |
5444 | |
5445 | public: |
5446 | /// Retrieve the qualification on this type. |
5447 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5448 | |
5449 | /// Retrieve the type named by the qualified-id. |
5450 | QualType getNamedType() const { return NamedType; } |
5451 | |
5452 | /// Remove a single level of sugar. |
5453 | QualType desugar() const { return getNamedType(); } |
5454 | |
5455 | /// Returns whether this type directly provides sugar. |
5456 | bool isSugared() const { return true; } |
5457 | |
5458 | /// Return the (re)declaration of this type owned by this occurrence of this |
5459 | /// type, or nullptr if there is none. |
5460 | TagDecl *getOwnedTagDecl() const { |
5461 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() |
5462 | : nullptr; |
5463 | } |
5464 | |
5465 | void Profile(llvm::FoldingSetNodeID &ID) { |
5466 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); |
5467 | } |
5468 | |
5469 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5470 | NestedNameSpecifier *NNS, QualType NamedType, |
5471 | TagDecl *OwnedTagDecl) { |
5472 | ID.AddInteger(Keyword); |
5473 | ID.AddPointer(NNS); |
5474 | NamedType.Profile(ID); |
5475 | ID.AddPointer(OwnedTagDecl); |
5476 | } |
5477 | |
5478 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } |
5479 | }; |
5480 | |
5481 | /// Represents a qualified type name for which the type name is |
5482 | /// dependent. |
5483 | /// |
5484 | /// DependentNameType represents a class of dependent types that involve a |
5485 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a |
5486 | /// name of a type. The DependentNameType may start with a "typename" (for a |
5487 | /// typename-specifier), "class", "struct", "union", or "enum" (for a |
5488 | /// dependent elaborated-type-specifier), or nothing (in contexts where we |
5489 | /// know that we must be referring to a type, e.g., in a base class specifier). |
5490 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility |
5491 | /// mode, this type is used with non-dependent names to delay name lookup until |
5492 | /// instantiation. |
5493 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { |
5494 | friend class ASTContext; // ASTContext creates these |
5495 | |
5496 | /// The nested name specifier containing the qualifier. |
5497 | NestedNameSpecifier *NNS; |
5498 | |
5499 | /// The type that this typename specifier refers to. |
5500 | const IdentifierInfo *Name; |
5501 | |
5502 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5503 | const IdentifierInfo *Name, QualType CanonType) |
5504 | : TypeWithKeyword(Keyword, DependentName, CanonType, |
5505 | TypeDependence::DependentInstantiation | |
5506 | toTypeDependence(NNS->getDependence())), |
5507 | NNS(NNS), Name(Name) {} |
5508 | |
5509 | public: |
5510 | /// Retrieve the qualification on this type. |
5511 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5512 | |
5513 | /// Retrieve the type named by the typename specifier as an identifier. |
5514 | /// |
5515 | /// This routine will return a non-NULL identifier pointer when the |
5516 | /// form of the original typename was terminated by an identifier, |
5517 | /// e.g., "typename T::type". |
5518 | const IdentifierInfo *getIdentifier() const { |
5519 | return Name; |
5520 | } |
5521 | |
5522 | bool isSugared() const { return false; } |
5523 | QualType desugar() const { return QualType(this, 0); } |
5524 | |
5525 | void Profile(llvm::FoldingSetNodeID &ID) { |
5526 | Profile(ID, getKeyword(), NNS, Name); |
5527 | } |
5528 | |
5529 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5530 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { |
5531 | ID.AddInteger(Keyword); |
5532 | ID.AddPointer(NNS); |
5533 | ID.AddPointer(Name); |
5534 | } |
5535 | |
5536 | static bool classof(const Type *T) { |
5537 | return T->getTypeClass() == DependentName; |
5538 | } |
5539 | }; |
5540 | |
5541 | /// Represents a template specialization type whose template cannot be |
5542 | /// resolved, e.g. |
5543 | /// A<T>::template B<T> |
5544 | class alignas(8) DependentTemplateSpecializationType |
5545 | : public TypeWithKeyword, |
5546 | public llvm::FoldingSetNode { |
5547 | friend class ASTContext; // ASTContext creates these |
5548 | |
5549 | /// The nested name specifier containing the qualifier. |
5550 | NestedNameSpecifier *NNS; |
5551 | |
5552 | /// The identifier of the template. |
5553 | const IdentifierInfo *Name; |
5554 | |
5555 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, |
5556 | NestedNameSpecifier *NNS, |
5557 | const IdentifierInfo *Name, |
5558 | ArrayRef<TemplateArgument> Args, |
5559 | QualType Canon); |
5560 | |
5561 | const TemplateArgument *getArgBuffer() const { |
5562 | return reinterpret_cast<const TemplateArgument*>(this+1); |
5563 | } |
5564 | |
5565 | TemplateArgument *getArgBuffer() { |
5566 | return reinterpret_cast<TemplateArgument*>(this+1); |
5567 | } |
5568 | |
5569 | public: |
5570 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5571 | const IdentifierInfo *getIdentifier() const { return Name; } |
5572 | |
5573 | /// Retrieve the template arguments. |
5574 | const TemplateArgument *getArgs() const { |
5575 | return getArgBuffer(); |
5576 | } |
5577 | |
5578 | /// Retrieve the number of template arguments. |
5579 | unsigned getNumArgs() const { |
5580 | return DependentTemplateSpecializationTypeBits.NumArgs; |
5581 | } |
5582 | |
5583 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5584 | |
5585 | ArrayRef<TemplateArgument> template_arguments() const { |
5586 | return {getArgs(), getNumArgs()}; |
5587 | } |
5588 | |
5589 | using iterator = const TemplateArgument *; |
5590 | |
5591 | iterator begin() const { return getArgs(); } |
5592 | iterator end() const; // inline in TemplateBase.h |
5593 | |
5594 | bool isSugared() const { return false; } |
5595 | QualType desugar() const { return QualType(this, 0); } |
5596 | |
5597 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5598 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); |
5599 | } |
5600 | |
5601 | static void Profile(llvm::FoldingSetNodeID &ID, |
5602 | const ASTContext &Context, |
5603 | ElaboratedTypeKeyword Keyword, |
5604 | NestedNameSpecifier *Qualifier, |
5605 | const IdentifierInfo *Name, |
5606 | ArrayRef<TemplateArgument> Args); |
5607 | |
5608 | static bool classof(const Type *T) { |
5609 | return T->getTypeClass() == DependentTemplateSpecialization; |
5610 | } |
5611 | }; |
5612 | |
5613 | /// Represents a pack expansion of types. |
5614 | /// |
5615 | /// Pack expansions are part of C++11 variadic templates. A pack |
5616 | /// expansion contains a pattern, which itself contains one or more |
5617 | /// "unexpanded" parameter packs. When instantiated, a pack expansion |
5618 | /// produces a series of types, each instantiated from the pattern of |
5619 | /// the expansion, where the Ith instantiation of the pattern uses the |
5620 | /// Ith arguments bound to each of the unexpanded parameter packs. The |
5621 | /// pack expansion is considered to "expand" these unexpanded |
5622 | /// parameter packs. |
5623 | /// |
5624 | /// \code |
5625 | /// template<typename ...Types> struct tuple; |
5626 | /// |
5627 | /// template<typename ...Types> |
5628 | /// struct tuple_of_references { |
5629 | /// typedef tuple<Types&...> type; |
5630 | /// }; |
5631 | /// \endcode |
5632 | /// |
5633 | /// Here, the pack expansion \c Types&... is represented via a |
5634 | /// PackExpansionType whose pattern is Types&. |
5635 | class PackExpansionType : public Type, public llvm::FoldingSetNode { |
5636 | friend class ASTContext; // ASTContext creates these |
5637 | |
5638 | /// The pattern of the pack expansion. |
5639 | QualType Pattern; |
5640 | |
5641 | PackExpansionType(QualType Pattern, QualType Canon, |
5642 | Optional<unsigned> NumExpansions) |
5643 | : Type(PackExpansion, Canon, |
5644 | (Pattern->getDependence() | TypeDependence::Dependent | |
5645 | TypeDependence::Instantiation) & |
5646 | ~TypeDependence::UnexpandedPack), |
5647 | Pattern(Pattern) { |
5648 | PackExpansionTypeBits.NumExpansions = |
5649 | NumExpansions ? *NumExpansions + 1 : 0; |
5650 | } |
5651 | |
5652 | public: |
5653 | /// Retrieve the pattern of this pack expansion, which is the |
5654 | /// type that will be repeatedly instantiated when instantiating the |
5655 | /// pack expansion itself. |
5656 | QualType getPattern() const { return Pattern; } |
5657 | |
5658 | /// Retrieve the number of expansions that this pack expansion will |
5659 | /// generate, if known. |
5660 | Optional<unsigned> getNumExpansions() const { |
5661 | if (PackExpansionTypeBits.NumExpansions) |
5662 | return PackExpansionTypeBits.NumExpansions - 1; |
5663 | return None; |
5664 | } |
5665 | |
5666 | bool isSugared() const { return false; } |
5667 | QualType desugar() const { return QualType(this, 0); } |
5668 | |
5669 | void Profile(llvm::FoldingSetNodeID &ID) { |
5670 | Profile(ID, getPattern(), getNumExpansions()); |
5671 | } |
5672 | |
5673 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, |
5674 | Optional<unsigned> NumExpansions) { |
5675 | ID.AddPointer(Pattern.getAsOpaquePtr()); |
5676 | ID.AddBoolean(NumExpansions.hasValue()); |
5677 | if (NumExpansions) |
5678 | ID.AddInteger(*NumExpansions); |
5679 | } |
5680 | |
5681 | static bool classof(const Type *T) { |
5682 | return T->getTypeClass() == PackExpansion; |
5683 | } |
5684 | }; |
5685 | |
5686 | /// This class wraps the list of protocol qualifiers. For types that can |
5687 | /// take ObjC protocol qualifers, they can subclass this class. |
5688 | template <class T> |
5689 | class ObjCProtocolQualifiers { |
5690 | protected: |
5691 | ObjCProtocolQualifiers() = default; |
5692 | |
5693 | ObjCProtocolDecl * const *getProtocolStorage() const { |
5694 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); |
5695 | } |
5696 | |
5697 | ObjCProtocolDecl **getProtocolStorage() { |
5698 | return static_cast<T*>(this)->getProtocolStorageImpl(); |
5699 | } |
5700 | |
5701 | void setNumProtocols(unsigned N) { |
5702 | static_cast<T*>(this)->setNumProtocolsImpl(N); |
5703 | } |
5704 | |
5705 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { |
5706 | setNumProtocols(protocols.size()); |
5707 | assert(getNumProtocols() == protocols.size() &&(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5708, __extension__ __PRETTY_FUNCTION__)) |
5708 | "bitfield overflow in protocol count")(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5708, __extension__ __PRETTY_FUNCTION__)); |
5709 | if (!protocols.empty()) |
5710 | memcpy(getProtocolStorage(), protocols.data(), |
5711 | protocols.size() * sizeof(ObjCProtocolDecl*)); |
5712 | } |
5713 | |
5714 | public: |
5715 | using qual_iterator = ObjCProtocolDecl * const *; |
5716 | using qual_range = llvm::iterator_range<qual_iterator>; |
5717 | |
5718 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5719 | qual_iterator qual_begin() const { return getProtocolStorage(); } |
5720 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } |
5721 | |
5722 | bool qual_empty() const { return getNumProtocols() == 0; } |
5723 | |
5724 | /// Return the number of qualifying protocols in this type, or 0 if |
5725 | /// there are none. |
5726 | unsigned getNumProtocols() const { |
5727 | return static_cast<const T*>(this)->getNumProtocolsImpl(); |
5728 | } |
5729 | |
5730 | /// Fetch a protocol by index. |
5731 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
5732 | assert(I < getNumProtocols() && "Out-of-range protocol access")(static_cast <bool> (I < getNumProtocols() && "Out-of-range protocol access") ? void (0) : __assert_fail ( "I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5732, __extension__ __PRETTY_FUNCTION__)); |
5733 | return qual_begin()[I]; |
5734 | } |
5735 | |
5736 | /// Retrieve all of the protocol qualifiers. |
5737 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { |
5738 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); |
5739 | } |
5740 | }; |
5741 | |
5742 | /// Represents a type parameter type in Objective C. It can take |
5743 | /// a list of protocols. |
5744 | class ObjCTypeParamType : public Type, |
5745 | public ObjCProtocolQualifiers<ObjCTypeParamType>, |
5746 | public llvm::FoldingSetNode { |
5747 | friend class ASTContext; |
5748 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; |
5749 | |
5750 | /// The number of protocols stored on this type. |
5751 | unsigned NumProtocols : 6; |
5752 | |
5753 | ObjCTypeParamDecl *OTPDecl; |
5754 | |
5755 | /// The protocols are stored after the ObjCTypeParamType node. In the |
5756 | /// canonical type, the list of protocols are sorted alphabetically |
5757 | /// and uniqued. |
5758 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5759 | |
5760 | /// Return the number of qualifying protocols in this interface type, |
5761 | /// or 0 if there are none. |
5762 | unsigned getNumProtocolsImpl() const { |
5763 | return NumProtocols; |
5764 | } |
5765 | |
5766 | void setNumProtocolsImpl(unsigned N) { |
5767 | NumProtocols = N; |
5768 | } |
5769 | |
5770 | ObjCTypeParamType(const ObjCTypeParamDecl *D, |
5771 | QualType can, |
5772 | ArrayRef<ObjCProtocolDecl *> protocols); |
5773 | |
5774 | public: |
5775 | bool isSugared() const { return true; } |
5776 | QualType desugar() const { return getCanonicalTypeInternal(); } |
5777 | |
5778 | static bool classof(const Type *T) { |
5779 | return T->getTypeClass() == ObjCTypeParam; |
5780 | } |
5781 | |
5782 | void Profile(llvm::FoldingSetNodeID &ID); |
5783 | static void Profile(llvm::FoldingSetNodeID &ID, |
5784 | const ObjCTypeParamDecl *OTPDecl, |
5785 | QualType CanonicalType, |
5786 | ArrayRef<ObjCProtocolDecl *> protocols); |
5787 | |
5788 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } |
5789 | }; |
5790 | |
5791 | /// Represents a class type in Objective C. |
5792 | /// |
5793 | /// Every Objective C type is a combination of a base type, a set of |
5794 | /// type arguments (optional, for parameterized classes) and a list of |
5795 | /// protocols. |
5796 | /// |
5797 | /// Given the following declarations: |
5798 | /// \code |
5799 | /// \@class C<T>; |
5800 | /// \@protocol P; |
5801 | /// \endcode |
5802 | /// |
5803 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType |
5804 | /// with base C and no protocols. |
5805 | /// |
5806 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. |
5807 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no |
5808 | /// protocol list. |
5809 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', |
5810 | /// and protocol list [P]. |
5811 | /// |
5812 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose |
5813 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType |
5814 | /// and no protocols. |
5815 | /// |
5816 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType |
5817 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually |
5818 | /// this should get its own sugar class to better represent the source. |
5819 | class ObjCObjectType : public Type, |
5820 | public ObjCProtocolQualifiers<ObjCObjectType> { |
5821 | friend class ObjCProtocolQualifiers<ObjCObjectType>; |
5822 | |
5823 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored |
5824 | // after the ObjCObjectPointerType node. |
5825 | // ObjCObjectType.NumProtocols - the number of protocols stored |
5826 | // after the type arguments of ObjCObjectPointerType node. |
5827 | // |
5828 | // These protocols are those written directly on the type. If |
5829 | // protocol qualifiers ever become additive, the iterators will need |
5830 | // to get kindof complicated. |
5831 | // |
5832 | // In the canonical object type, these are sorted alphabetically |
5833 | // and uniqued. |
5834 | |
5835 | /// Either a BuiltinType or an InterfaceType or sugar for either. |
5836 | QualType BaseType; |
5837 | |
5838 | /// Cached superclass type. |
5839 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> |
5840 | CachedSuperClassType; |
5841 | |
5842 | QualType *getTypeArgStorage(); |
5843 | const QualType *getTypeArgStorage() const { |
5844 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); |
5845 | } |
5846 | |
5847 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5848 | /// Return the number of qualifying protocols in this interface type, |
5849 | /// or 0 if there are none. |
5850 | unsigned getNumProtocolsImpl() const { |
5851 | return ObjCObjectTypeBits.NumProtocols; |
5852 | } |
5853 | void setNumProtocolsImpl(unsigned N) { |
5854 | ObjCObjectTypeBits.NumProtocols = N; |
5855 | } |
5856 | |
5857 | protected: |
5858 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; |
5859 | |
5860 | ObjCObjectType(QualType Canonical, QualType Base, |
5861 | ArrayRef<QualType> typeArgs, |
5862 | ArrayRef<ObjCProtocolDecl *> protocols, |
5863 | bool isKindOf); |
5864 | |
5865 | ObjCObjectType(enum Nonce_ObjCInterface) |
5866 | : Type(ObjCInterface, QualType(), TypeDependence::None), |
5867 | BaseType(QualType(this_(), 0)) { |
5868 | ObjCObjectTypeBits.NumProtocols = 0; |
5869 | ObjCObjectTypeBits.NumTypeArgs = 0; |
5870 | ObjCObjectTypeBits.IsKindOf = 0; |
5871 | } |
5872 | |
5873 | void computeSuperClassTypeSlow() const; |
5874 | |
5875 | public: |
5876 | /// Gets the base type of this object type. This is always (possibly |
5877 | /// sugar for) one of: |
5878 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the |
5879 | /// user, which is a typedef for an ObjCObjectPointerType) |
5880 | /// - the 'Class' builtin type (same caveat) |
5881 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) |
5882 | QualType getBaseType() const { return BaseType; } |
5883 | |
5884 | bool isObjCId() const { |
5885 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); |
5886 | } |
5887 | |
5888 | bool isObjCClass() const { |
5889 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); |
5890 | } |
5891 | |
5892 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } |
5893 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } |
5894 | bool isObjCUnqualifiedIdOrClass() const { |
5895 | if (!qual_empty()) return false; |
5896 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) |
5897 | return T->getKind() == BuiltinType::ObjCId || |
5898 | T->getKind() == BuiltinType::ObjCClass; |
5899 | return false; |
5900 | } |
5901 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } |
5902 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } |
5903 | |
5904 | /// Gets the interface declaration for this object type, if the base type |
5905 | /// really is an interface. |
5906 | ObjCInterfaceDecl *getInterface() const; |
5907 | |
5908 | /// Determine whether this object type is "specialized", meaning |
5909 | /// that it has type arguments. |
5910 | bool isSpecialized() const; |
5911 | |
5912 | /// Determine whether this object type was written with type arguments. |
5913 | bool isSpecializedAsWritten() const { |
5914 | return ObjCObjectTypeBits.NumTypeArgs > 0; |
5915 | } |
5916 | |
5917 | /// Determine whether this object type is "unspecialized", meaning |
5918 | /// that it has no type arguments. |
5919 | bool isUnspecialized() const { return !isSpecialized(); } |
5920 | |
5921 | /// Determine whether this object type is "unspecialized" as |
5922 | /// written, meaning that it has no type arguments. |
5923 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5924 | |
5925 | /// Retrieve the type arguments of this object type (semantically). |
5926 | ArrayRef<QualType> getTypeArgs() const; |
5927 | |
5928 | /// Retrieve the type arguments of this object type as they were |
5929 | /// written. |
5930 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5931 | return llvm::makeArrayRef(getTypeArgStorage(), |
5932 | ObjCObjectTypeBits.NumTypeArgs); |
5933 | } |
5934 | |
5935 | /// Whether this is a "__kindof" type as written. |
5936 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } |
5937 | |
5938 | /// Whether this ia a "__kindof" type (semantically). |
5939 | bool isKindOfType() const; |
5940 | |
5941 | /// Retrieve the type of the superclass of this object type. |
5942 | /// |
5943 | /// This operation substitutes any type arguments into the |
5944 | /// superclass of the current class type, potentially producing a |
5945 | /// specialization of the superclass type. Produces a null type if |
5946 | /// there is no superclass. |
5947 | QualType getSuperClassType() const { |
5948 | if (!CachedSuperClassType.getInt()) |
5949 | computeSuperClassTypeSlow(); |
5950 | |
5951 | assert(CachedSuperClassType.getInt() && "Superclass not set?")(static_cast <bool> (CachedSuperClassType.getInt() && "Superclass not set?") ? void (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 5951, __extension__ __PRETTY_FUNCTION__)); |
5952 | return QualType(CachedSuperClassType.getPointer(), 0); |
5953 | } |
5954 | |
5955 | /// Strip off the Objective-C "kindof" type and (with it) any |
5956 | /// protocol qualifiers. |
5957 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; |
5958 | |
5959 | bool isSugared() const { return false; } |
5960 | QualType desugar() const { return QualType(this, 0); } |
5961 | |
5962 | static bool classof(const Type *T) { |
5963 | return T->getTypeClass() == ObjCObject || |
5964 | T->getTypeClass() == ObjCInterface; |
5965 | } |
5966 | }; |
5967 | |
5968 | /// A class providing a concrete implementation |
5969 | /// of ObjCObjectType, so as to not increase the footprint of |
5970 | /// ObjCInterfaceType. Code outside of ASTContext and the core type |
5971 | /// system should not reference this type. |
5972 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { |
5973 | friend class ASTContext; |
5974 | |
5975 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() |
5976 | // will need to be modified. |
5977 | |
5978 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, |
5979 | ArrayRef<QualType> typeArgs, |
5980 | ArrayRef<ObjCProtocolDecl *> protocols, |
5981 | bool isKindOf) |
5982 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} |
5983 | |
5984 | public: |
5985 | void Profile(llvm::FoldingSetNodeID &ID); |
5986 | static void Profile(llvm::FoldingSetNodeID &ID, |
5987 | QualType Base, |
5988 | ArrayRef<QualType> typeArgs, |
5989 | ArrayRef<ObjCProtocolDecl *> protocols, |
5990 | bool isKindOf); |
5991 | }; |
5992 | |
5993 | inline QualType *ObjCObjectType::getTypeArgStorage() { |
5994 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); |
5995 | } |
5996 | |
5997 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { |
5998 | return reinterpret_cast<ObjCProtocolDecl**>( |
5999 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); |
6000 | } |
6001 | |
6002 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { |
6003 | return reinterpret_cast<ObjCProtocolDecl**>( |
6004 | static_cast<ObjCTypeParamType*>(this)+1); |
6005 | } |
6006 | |
6007 | /// Interfaces are the core concept in Objective-C for object oriented design. |
6008 | /// They basically correspond to C++ classes. There are two kinds of interface |
6009 | /// types: normal interfaces like `NSString`, and qualified interfaces, which |
6010 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. |
6011 | /// |
6012 | /// ObjCInterfaceType guarantees the following properties when considered |
6013 | /// as a subtype of its superclass, ObjCObjectType: |
6014 | /// - There are no protocol qualifiers. To reinforce this, code which |
6015 | /// tries to invoke the protocol methods via an ObjCInterfaceType will |
6016 | /// fail to compile. |
6017 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, |
6018 | /// T->getBaseType() == QualType(T, 0). |
6019 | class ObjCInterfaceType : public ObjCObjectType { |
6020 | friend class ASTContext; // ASTContext creates these. |
6021 | friend class ASTReader; |
6022 | friend class ObjCInterfaceDecl; |
6023 | template <class T> friend class serialization::AbstractTypeReader; |
6024 | |
6025 | mutable ObjCInterfaceDecl *Decl; |
6026 | |
6027 | ObjCInterfaceType(const ObjCInterfaceDecl *D) |
6028 | : ObjCObjectType(Nonce_ObjCInterface), |
6029 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} |
6030 | |
6031 | public: |
6032 | /// Get the declaration of this interface. |
6033 | ObjCInterfaceDecl *getDecl() const { return Decl; } |
6034 | |
6035 | bool isSugared() const { return false; } |
6036 | QualType desugar() const { return QualType(this, 0); } |
6037 | |
6038 | static bool classof(const Type *T) { |
6039 | return T->getTypeClass() == ObjCInterface; |
6040 | } |
6041 | |
6042 | // Nonsense to "hide" certain members of ObjCObjectType within this |
6043 | // class. People asking for protocols on an ObjCInterfaceType are |
6044 | // not going to get what they want: ObjCInterfaceTypes are |
6045 | // guaranteed to have no protocols. |
6046 | enum { |
6047 | qual_iterator, |
6048 | qual_begin, |
6049 | qual_end, |
6050 | getNumProtocols, |
6051 | getProtocol |
6052 | }; |
6053 | }; |
6054 | |
6055 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { |
6056 | QualType baseType = getBaseType(); |
6057 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { |
6058 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) |
6059 | return T->getDecl(); |
6060 | |
6061 | baseType = ObjT->getBaseType(); |
6062 | } |
6063 | |
6064 | return nullptr; |
6065 | } |
6066 | |
6067 | /// Represents a pointer to an Objective C object. |
6068 | /// |
6069 | /// These are constructed from pointer declarators when the pointee type is |
6070 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' |
6071 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' |
6072 | /// and 'Class<P>' are translated into these. |
6073 | /// |
6074 | /// Pointers to pointers to Objective C objects are still PointerTypes; |
6075 | /// only the first level of pointer gets it own type implementation. |
6076 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { |
6077 | friend class ASTContext; // ASTContext creates these. |
6078 | |
6079 | QualType PointeeType; |
6080 | |
6081 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) |
6082 | : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()), |
6083 | PointeeType(Pointee) {} |
6084 | |
6085 | public: |
6086 | /// Gets the type pointed to by this ObjC pointer. |
6087 | /// The result will always be an ObjCObjectType or sugar thereof. |
6088 | QualType getPointeeType() const { return PointeeType; } |
6089 | |
6090 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. |
6091 | /// |
6092 | /// This method is equivalent to getPointeeType() except that |
6093 | /// it discards any typedefs (or other sugar) between this |
6094 | /// type and the "outermost" object type. So for: |
6095 | /// \code |
6096 | /// \@class A; \@protocol P; \@protocol Q; |
6097 | /// typedef A<P> AP; |
6098 | /// typedef A A1; |
6099 | /// typedef A1<P> A1P; |
6100 | /// typedef A1P<Q> A1PQ; |
6101 | /// \endcode |
6102 | /// For 'A*', getObjectType() will return 'A'. |
6103 | /// For 'A<P>*', getObjectType() will return 'A<P>'. |
6104 | /// For 'AP*', getObjectType() will return 'A<P>'. |
6105 | /// For 'A1*', getObjectType() will return 'A'. |
6106 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. |
6107 | /// For 'A1P*', getObjectType() will return 'A1<P>'. |
6108 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because |
6109 | /// adding protocols to a protocol-qualified base discards the |
6110 | /// old qualifiers (for now). But if it didn't, getObjectType() |
6111 | /// would return 'A1P<Q>' (and we'd have to make iterating over |
6112 | /// qualifiers more complicated). |
6113 | const ObjCObjectType *getObjectType() const { |
6114 | return PointeeType->castAs<ObjCObjectType>(); |
6115 | } |
6116 | |
6117 | /// If this pointer points to an Objective C |
6118 | /// \@interface type, gets the type for that interface. Any protocol |
6119 | /// qualifiers on the interface are ignored. |
6120 | /// |
6121 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6122 | const ObjCInterfaceType *getInterfaceType() const; |
6123 | |
6124 | /// If this pointer points to an Objective \@interface |
6125 | /// type, gets the declaration for that interface. |
6126 | /// |
6127 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6128 | ObjCInterfaceDecl *getInterfaceDecl() const { |
6129 | return getObjectType()->getInterface(); |
6130 | } |
6131 | |
6132 | /// True if this is equivalent to the 'id' type, i.e. if |
6133 | /// its object type is the primitive 'id' type with no protocols. |
6134 | bool isObjCIdType() const { |
6135 | return getObjectType()->isObjCUnqualifiedId(); |
6136 | } |
6137 | |
6138 | /// True if this is equivalent to the 'Class' type, |
6139 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. |
6140 | bool isObjCClassType() const { |
6141 | return getObjectType()->isObjCUnqualifiedClass(); |
6142 | } |
6143 | |
6144 | /// True if this is equivalent to the 'id' or 'Class' type, |
6145 | bool isObjCIdOrClassType() const { |
6146 | return getObjectType()->isObjCUnqualifiedIdOrClass(); |
6147 | } |
6148 | |
6149 | /// True if this is equivalent to 'id<P>' for some non-empty set of |
6150 | /// protocols. |
6151 | bool isObjCQualifiedIdType() const { |
6152 | return getObjectType()->isObjCQualifiedId(); |
6153 | } |
6154 | |
6155 | /// True if this is equivalent to 'Class<P>' for some non-empty set of |
6156 | /// protocols. |
6157 | bool isObjCQualifiedClassType() const { |
6158 | return getObjectType()->isObjCQualifiedClass(); |
6159 | } |
6160 | |
6161 | /// Whether this is a "__kindof" type. |
6162 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } |
6163 | |
6164 | /// Whether this type is specialized, meaning that it has type arguments. |
6165 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } |
6166 | |
6167 | /// Whether this type is specialized, meaning that it has type arguments. |
6168 | bool isSpecializedAsWritten() const { |
6169 | return getObjectType()->isSpecializedAsWritten(); |
6170 | } |
6171 | |
6172 | /// Whether this type is unspecialized, meaning that is has no type arguments. |
6173 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } |
6174 | |
6175 | /// Determine whether this object type is "unspecialized" as |
6176 | /// written, meaning that it has no type arguments. |
6177 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
6178 | |
6179 | /// Retrieve the type arguments for this type. |
6180 | ArrayRef<QualType> getTypeArgs() const { |
6181 | return getObjectType()->getTypeArgs(); |
6182 | } |
6183 | |
6184 | /// Retrieve the type arguments for this type. |
6185 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
6186 | return getObjectType()->getTypeArgsAsWritten(); |
6187 | } |
6188 | |
6189 | /// An iterator over the qualifiers on the object type. Provided |
6190 | /// for convenience. This will always iterate over the full set of |
6191 | /// protocols on a type, not just those provided directly. |
6192 | using qual_iterator = ObjCObjectType::qual_iterator; |
6193 | using qual_range = llvm::iterator_range<qual_iterator>; |
6194 | |
6195 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
6196 | |
6197 | qual_iterator qual_begin() const { |
6198 | return getObjectType()->qual_begin(); |
6199 | } |
6200 | |
6201 | qual_iterator qual_end() const { |
6202 | return getObjectType()->qual_end(); |
6203 | } |
6204 | |
6205 | bool qual_empty() const { return getObjectType()->qual_empty(); } |
6206 | |
6207 | /// Return the number of qualifying protocols on the object type. |
6208 | unsigned getNumProtocols() const { |
6209 | return getObjectType()->getNumProtocols(); |
6210 | } |
6211 | |
6212 | /// Retrieve a qualifying protocol by index on the object type. |
6213 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
6214 | return getObjectType()->getProtocol(I); |
6215 | } |
6216 | |
6217 | bool isSugared() const { return false; } |
6218 | QualType desugar() const { return QualType(this, 0); } |
6219 | |
6220 | /// Retrieve the type of the superclass of this object pointer type. |
6221 | /// |
6222 | /// This operation substitutes any type arguments into the |
6223 | /// superclass of the current class type, potentially producing a |
6224 | /// pointer to a specialization of the superclass type. Produces a |
6225 | /// null type if there is no superclass. |
6226 | QualType getSuperClassType() const; |
6227 | |
6228 | /// Strip off the Objective-C "kindof" type and (with it) any |
6229 | /// protocol qualifiers. |
6230 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( |
6231 | const ASTContext &ctx) const; |
6232 | |
6233 | void Profile(llvm::FoldingSetNodeID &ID) { |
6234 | Profile(ID, getPointeeType()); |
6235 | } |
6236 | |
6237 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6238 | ID.AddPointer(T.getAsOpaquePtr()); |
6239 | } |
6240 | |
6241 | static bool classof(const Type *T) { |
6242 | return T->getTypeClass() == ObjCObjectPointer; |
6243 | } |
6244 | }; |
6245 | |
6246 | class AtomicType : public Type, public llvm::FoldingSetNode { |
6247 | friend class ASTContext; // ASTContext creates these. |
6248 | |
6249 | QualType ValueType; |
6250 | |
6251 | AtomicType(QualType ValTy, QualType Canonical) |
6252 | : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {} |
6253 | |
6254 | public: |
6255 | /// Gets the type contained by this atomic type, i.e. |
6256 | /// the type returned by performing an atomic load of this atomic type. |
6257 | QualType getValueType() const { return ValueType; } |
6258 | |
6259 | bool isSugared() const { return false; } |
6260 | QualType desugar() const { return QualType(this, 0); } |
6261 | |
6262 | void Profile(llvm::FoldingSetNodeID &ID) { |
6263 | Profile(ID, getValueType()); |
6264 | } |
6265 | |
6266 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6267 | ID.AddPointer(T.getAsOpaquePtr()); |
6268 | } |
6269 | |
6270 | static bool classof(const Type *T) { |
6271 | return T->getTypeClass() == Atomic; |
6272 | } |
6273 | }; |
6274 | |
6275 | /// PipeType - OpenCL20. |
6276 | class PipeType : public Type, public llvm::FoldingSetNode { |
6277 | friend class ASTContext; // ASTContext creates these. |
6278 | |
6279 | QualType ElementType; |
6280 | bool isRead; |
6281 | |
6282 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) |
6283 | : Type(Pipe, CanonicalPtr, elemType->getDependence()), |
6284 | ElementType(elemType), isRead(isRead) {} |
6285 | |
6286 | public: |
6287 | QualType getElementType() const { return ElementType; } |
6288 | |
6289 | bool isSugared() const { return false; } |
6290 | |
6291 | QualType desugar() const { return QualType(this, 0); } |
6292 | |
6293 | void Profile(llvm::FoldingSetNodeID &ID) { |
6294 | Profile(ID, getElementType(), isReadOnly()); |
6295 | } |
6296 | |
6297 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { |
6298 | ID.AddPointer(T.getAsOpaquePtr()); |
6299 | ID.AddBoolean(isRead); |
6300 | } |
6301 | |
6302 | static bool classof(const Type *T) { |
6303 | return T->getTypeClass() == Pipe; |
6304 | } |
6305 | |
6306 | bool isReadOnly() const { return isRead; } |
6307 | }; |
6308 | |
6309 | /// A fixed int type of a specified bitwidth. |
6310 | class ExtIntType final : public Type, public llvm::FoldingSetNode { |
6311 | friend class ASTContext; |
6312 | unsigned IsUnsigned : 1; |
6313 | unsigned NumBits : 24; |
6314 | |
6315 | protected: |
6316 | ExtIntType(bool isUnsigned, unsigned NumBits); |
6317 | |
6318 | public: |
6319 | bool isUnsigned() const { return IsUnsigned; } |
6320 | bool isSigned() const { return !IsUnsigned; } |
6321 | unsigned getNumBits() const { return NumBits; } |
6322 | |
6323 | bool isSugared() const { return false; } |
6324 | QualType desugar() const { return QualType(this, 0); } |
6325 | |
6326 | void Profile(llvm::FoldingSetNodeID &ID) { |
6327 | Profile(ID, isUnsigned(), getNumBits()); |
6328 | } |
6329 | |
6330 | static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned, |
6331 | unsigned NumBits) { |
6332 | ID.AddBoolean(IsUnsigned); |
6333 | ID.AddInteger(NumBits); |
6334 | } |
6335 | |
6336 | static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; } |
6337 | }; |
6338 | |
6339 | class DependentExtIntType final : public Type, public llvm::FoldingSetNode { |
6340 | friend class ASTContext; |
6341 | const ASTContext &Context; |
6342 | llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned; |
6343 | |
6344 | protected: |
6345 | DependentExtIntType(const ASTContext &Context, bool IsUnsigned, |
6346 | Expr *NumBits); |
6347 | |
6348 | public: |
6349 | bool isUnsigned() const; |
6350 | bool isSigned() const { return !isUnsigned(); } |
6351 | Expr *getNumBitsExpr() const; |
6352 | |
6353 | bool isSugared() const { return false; } |
6354 | QualType desugar() const { return QualType(this, 0); } |
6355 | |
6356 | void Profile(llvm::FoldingSetNodeID &ID) { |
6357 | Profile(ID, Context, isUnsigned(), getNumBitsExpr()); |
6358 | } |
6359 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
6360 | bool IsUnsigned, Expr *NumBitsExpr); |
6361 | |
6362 | static bool classof(const Type *T) { |
6363 | return T->getTypeClass() == DependentExtInt; |
6364 | } |
6365 | }; |
6366 | |
6367 | /// A qualifier set is used to build a set of qualifiers. |
6368 | class QualifierCollector : public Qualifiers { |
6369 | public: |
6370 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} |
6371 | |
6372 | /// Collect any qualifiers on the given type and return an |
6373 | /// unqualified type. The qualifiers are assumed to be consistent |
6374 | /// with those already in the type. |
6375 | const Type *strip(QualType type) { |
6376 | addFastQualifiers(type.getLocalFastQualifiers()); |
6377 | if (!type.hasLocalNonFastQualifiers()) |
6378 | return type.getTypePtrUnsafe(); |
6379 | |
6380 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); |
6381 | addConsistentQualifiers(extQuals->getQualifiers()); |
6382 | return extQuals->getBaseType(); |
6383 | } |
6384 | |
6385 | /// Apply the collected qualifiers to the given type. |
6386 | QualType apply(const ASTContext &Context, QualType QT) const; |
6387 | |
6388 | /// Apply the collected qualifiers to the given type. |
6389 | QualType apply(const ASTContext &Context, const Type* T) const; |
6390 | }; |
6391 | |
6392 | /// A container of type source information. |
6393 | /// |
6394 | /// A client can read the relevant info using TypeLoc wrappers, e.g: |
6395 | /// @code |
6396 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); |
6397 | /// TL.getBeginLoc().print(OS, SrcMgr); |
6398 | /// @endcode |
6399 | class alignas(8) TypeSourceInfo { |
6400 | // Contains a memory block after the class, used for type source information, |
6401 | // allocated by ASTContext. |
6402 | friend class ASTContext; |
6403 | |
6404 | QualType Ty; |
6405 | |
6406 | TypeSourceInfo(QualType ty) : Ty(ty) {} |
6407 | |
6408 | public: |
6409 | /// Return the type wrapped by this type source info. |
6410 | QualType getType() const { return Ty; } |
6411 | |
6412 | /// Return the TypeLoc wrapper for the type source info. |
6413 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h |
6414 | |
6415 | /// Override the type stored in this TypeSourceInfo. Use with caution! |
6416 | void overrideType(QualType T) { Ty = T; } |
6417 | }; |
6418 | |
6419 | // Inline function definitions. |
6420 | |
6421 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { |
6422 | SplitQualType desugar = |
6423 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); |
6424 | desugar.Quals.addConsistentQualifiers(Quals); |
6425 | return desugar; |
6426 | } |
6427 | |
6428 | inline const Type *QualType::getTypePtr() const { |
6429 | return getCommonPtr()->BaseType; |
6430 | } |
6431 | |
6432 | inline const Type *QualType::getTypePtrOrNull() const { |
6433 | return (isNull() ? nullptr : getCommonPtr()->BaseType); |
6434 | } |
6435 | |
6436 | inline SplitQualType QualType::split() const { |
6437 | if (!hasLocalNonFastQualifiers()) |
6438 | return SplitQualType(getTypePtrUnsafe(), |
6439 | Qualifiers::fromFastMask(getLocalFastQualifiers())); |
6440 | |
6441 | const ExtQuals *eq = getExtQualsUnsafe(); |
6442 | Qualifiers qs = eq->getQualifiers(); |
6443 | qs.addFastQualifiers(getLocalFastQualifiers()); |
6444 | return SplitQualType(eq->getBaseType(), qs); |
6445 | } |
6446 | |
6447 | inline Qualifiers QualType::getLocalQualifiers() const { |
6448 | Qualifiers Quals; |
6449 | if (hasLocalNonFastQualifiers()) |
6450 | Quals = getExtQualsUnsafe()->getQualifiers(); |
6451 | Quals.addFastQualifiers(getLocalFastQualifiers()); |
6452 | return Quals; |
6453 | } |
6454 | |
6455 | inline Qualifiers QualType::getQualifiers() const { |
6456 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); |
6457 | quals.addFastQualifiers(getLocalFastQualifiers()); |
6458 | return quals; |
6459 | } |
6460 | |
6461 | inline unsigned QualType::getCVRQualifiers() const { |
6462 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); |
6463 | cvr |= getLocalCVRQualifiers(); |
6464 | return cvr; |
6465 | } |
6466 | |
6467 | inline QualType QualType::getCanonicalType() const { |
6468 | QualType canon = getCommonPtr()->CanonicalType; |
6469 | return canon.withFastQualifiers(getLocalFastQualifiers()); |
6470 | } |
6471 | |
6472 | inline bool QualType::isCanonical() const { |
6473 | return getTypePtr()->isCanonicalUnqualified(); |
6474 | } |
6475 | |
6476 | inline bool QualType::isCanonicalAsParam() const { |
6477 | if (!isCanonical()) return false; |
6478 | if (hasLocalQualifiers()) return false; |
6479 | |
6480 | const Type *T = getTypePtr(); |
6481 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) |
6482 | return false; |
6483 | |
6484 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); |
6485 | } |
6486 | |
6487 | inline bool QualType::isConstQualified() const { |
6488 | return isLocalConstQualified() || |
6489 | getCommonPtr()->CanonicalType.isLocalConstQualified(); |
6490 | } |
6491 | |
6492 | inline bool QualType::isRestrictQualified() const { |
6493 | return isLocalRestrictQualified() || |
6494 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); |
6495 | } |
6496 | |
6497 | |
6498 | inline bool QualType::isVolatileQualified() const { |
6499 | return isLocalVolatileQualified() || |
6500 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); |
6501 | } |
6502 | |
6503 | inline bool QualType::hasQualifiers() const { |
6504 | return hasLocalQualifiers() || |
6505 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); |
6506 | } |
6507 | |
6508 | inline QualType QualType::getUnqualifiedType() const { |
6509 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6510 | return QualType(getTypePtr(), 0); |
6511 | |
6512 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); |
6513 | } |
6514 | |
6515 | inline SplitQualType QualType::getSplitUnqualifiedType() const { |
6516 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6517 | return split(); |
6518 | |
6519 | return getSplitUnqualifiedTypeImpl(*this); |
6520 | } |
6521 | |
6522 | inline void QualType::removeLocalConst() { |
6523 | removeLocalFastQualifiers(Qualifiers::Const); |
6524 | } |
6525 | |
6526 | inline void QualType::removeLocalRestrict() { |
6527 | removeLocalFastQualifiers(Qualifiers::Restrict); |
6528 | } |
6529 | |
6530 | inline void QualType::removeLocalVolatile() { |
6531 | removeLocalFastQualifiers(Qualifiers::Volatile); |
6532 | } |
6533 | |
6534 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { |
6535 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")(static_cast <bool> (!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 6535, __extension__ __PRETTY_FUNCTION__)); |
6536 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, |
6537 | "Fast bits differ from CVR bits!"); |
6538 | |
6539 | // Fast path: we don't need to touch the slow qualifiers. |
6540 | removeLocalFastQualifiers(Mask); |
6541 | } |
6542 | |
6543 | /// Check if this type has any address space qualifier. |
6544 | inline bool QualType::hasAddressSpace() const { |
6545 | return getQualifiers().hasAddressSpace(); |
6546 | } |
6547 | |
6548 | /// Return the address space of this type. |
6549 | inline LangAS QualType::getAddressSpace() const { |
6550 | return getQualifiers().getAddressSpace(); |
6551 | } |
6552 | |
6553 | /// Return the gc attribute of this type. |
6554 | inline Qualifiers::GC QualType::getObjCGCAttr() const { |
6555 | return getQualifiers().getObjCGCAttr(); |
6556 | } |
6557 | |
6558 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
6559 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6560 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); |
6561 | return false; |
6562 | } |
6563 | |
6564 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { |
6565 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6566 | return hasNonTrivialToPrimitiveDestructCUnion(RD); |
6567 | return false; |
6568 | } |
6569 | |
6570 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { |
6571 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6572 | return hasNonTrivialToPrimitiveCopyCUnion(RD); |
6573 | return false; |
6574 | } |
6575 | |
6576 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { |
6577 | if (const auto *PT = t.getAs<PointerType>()) { |
6578 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) |
6579 | return FT->getExtInfo(); |
6580 | } else if (const auto *FT = t.getAs<FunctionType>()) |
6581 | return FT->getExtInfo(); |
6582 | |
6583 | return FunctionType::ExtInfo(); |
6584 | } |
6585 | |
6586 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { |
6587 | return getFunctionExtInfo(*t); |
6588 | } |
6589 | |
6590 | /// Determine whether this type is more |
6591 | /// qualified than the Other type. For example, "const volatile int" |
6592 | /// is more qualified than "const int", "volatile int", and |
6593 | /// "int". However, it is not more qualified than "const volatile |
6594 | /// int". |
6595 | inline bool QualType::isMoreQualifiedThan(QualType other) const { |
6596 | Qualifiers MyQuals = getQualifiers(); |
6597 | Qualifiers OtherQuals = other.getQualifiers(); |
6598 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); |
6599 | } |
6600 | |
6601 | /// Determine whether this type is at last |
6602 | /// as qualified as the Other type. For example, "const volatile |
6603 | /// int" is at least as qualified as "const int", "volatile int", |
6604 | /// "int", and "const volatile int". |
6605 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { |
6606 | Qualifiers OtherQuals = other.getQualifiers(); |
6607 | |
6608 | // Ignore __unaligned qualifier if this type is a void. |
6609 | if (getUnqualifiedType()->isVoidType()) |
6610 | OtherQuals.removeUnaligned(); |
6611 | |
6612 | return getQualifiers().compatiblyIncludes(OtherQuals); |
6613 | } |
6614 | |
6615 | /// If Type is a reference type (e.g., const |
6616 | /// int&), returns the type that the reference refers to ("const |
6617 | /// int"). Otherwise, returns the type itself. This routine is used |
6618 | /// throughout Sema to implement C++ 5p6: |
6619 | /// |
6620 | /// If an expression initially has the type "reference to T" (8.3.2, |
6621 | /// 8.5.3), the type is adjusted to "T" prior to any further |
6622 | /// analysis, the expression designates the object or function |
6623 | /// denoted by the reference, and the expression is an lvalue. |
6624 | inline QualType QualType::getNonReferenceType() const { |
6625 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) |
6626 | return RefType->getPointeeType(); |
6627 | else |
6628 | return *this; |
6629 | } |
6630 | |
6631 | inline bool QualType::isCForbiddenLValueType() const { |
6632 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || |
6633 | getTypePtr()->isFunctionType()); |
6634 | } |
6635 | |
6636 | /// Tests whether the type is categorized as a fundamental type. |
6637 | /// |
6638 | /// \returns True for types specified in C++0x [basic.fundamental]. |
6639 | inline bool Type::isFundamentalType() const { |
6640 | return isVoidType() || |
6641 | isNullPtrType() || |
6642 | // FIXME: It's really annoying that we don't have an |
6643 | // 'isArithmeticType()' which agrees with the standard definition. |
6644 | (isArithmeticType() && !isEnumeralType()); |
6645 | } |
6646 | |
6647 | /// Tests whether the type is categorized as a compound type. |
6648 | /// |
6649 | /// \returns True for types specified in C++0x [basic.compound]. |
6650 | inline bool Type::isCompoundType() const { |
6651 | // C++0x [basic.compound]p1: |
6652 | // Compound types can be constructed in the following ways: |
6653 | // -- arrays of objects of a given type [...]; |
6654 | return isArrayType() || |
6655 | // -- functions, which have parameters of given types [...]; |
6656 | isFunctionType() || |
6657 | // -- pointers to void or objects or functions [...]; |
6658 | isPointerType() || |
6659 | // -- references to objects or functions of a given type. [...] |
6660 | isReferenceType() || |
6661 | // -- classes containing a sequence of objects of various types, [...]; |
6662 | isRecordType() || |
6663 | // -- unions, which are classes capable of containing objects of different |
6664 | // types at different times; |
6665 | isUnionType() || |
6666 | // -- enumerations, which comprise a set of named constant values. [...]; |
6667 | isEnumeralType() || |
6668 | // -- pointers to non-static class members, [...]. |
6669 | isMemberPointerType(); |
6670 | } |
6671 | |
6672 | inline bool Type::isFunctionType() const { |
6673 | return isa<FunctionType>(CanonicalType); |
6674 | } |
6675 | |
6676 | inline bool Type::isPointerType() const { |
6677 | return isa<PointerType>(CanonicalType); |
6678 | } |
6679 | |
6680 | inline bool Type::isAnyPointerType() const { |
6681 | return isPointerType() || isObjCObjectPointerType(); |
6682 | } |
6683 | |
6684 | inline bool Type::isBlockPointerType() const { |
6685 | return isa<BlockPointerType>(CanonicalType); |
6686 | } |
6687 | |
6688 | inline bool Type::isReferenceType() const { |
6689 | return isa<ReferenceType>(CanonicalType); |
6690 | } |
6691 | |
6692 | inline bool Type::isLValueReferenceType() const { |
6693 | return isa<LValueReferenceType>(CanonicalType); |
6694 | } |
6695 | |
6696 | inline bool Type::isRValueReferenceType() const { |
6697 | return isa<RValueReferenceType>(CanonicalType); |
6698 | } |
6699 | |
6700 | inline bool Type::isObjectPointerType() const { |
6701 | // Note: an "object pointer type" is not the same thing as a pointer to an |
6702 | // object type; rather, it is a pointer to an object type or a pointer to cv |
6703 | // void. |
6704 | if (const auto *T = getAs<PointerType>()) |
6705 | return !T->getPointeeType()->isFunctionType(); |
6706 | else |
6707 | return false; |
6708 | } |
6709 | |
6710 | inline bool Type::isFunctionPointerType() const { |
6711 | if (const auto *T = getAs<PointerType>()) |
6712 | return T->getPointeeType()->isFunctionType(); |
6713 | else |
6714 | return false; |
6715 | } |
6716 | |
6717 | inline bool Type::isFunctionReferenceType() const { |
6718 | if (const auto *T = getAs<ReferenceType>()) |
6719 | return T->getPointeeType()->isFunctionType(); |
6720 | else |
6721 | return false; |
6722 | } |
6723 | |
6724 | inline bool Type::isMemberPointerType() const { |
6725 | return isa<MemberPointerType>(CanonicalType); |
6726 | } |
6727 | |
6728 | inline bool Type::isMemberFunctionPointerType() const { |
6729 | if (const auto *T = getAs<MemberPointerType>()) |
6730 | return T->isMemberFunctionPointer(); |
6731 | else |
6732 | return false; |
6733 | } |
6734 | |
6735 | inline bool Type::isMemberDataPointerType() const { |
6736 | if (const auto *T = getAs<MemberPointerType>()) |
6737 | return T->isMemberDataPointer(); |
6738 | else |
6739 | return false; |
6740 | } |
6741 | |
6742 | inline bool Type::isArrayType() const { |
6743 | return isa<ArrayType>(CanonicalType); |
6744 | } |
6745 | |
6746 | inline bool Type::isConstantArrayType() const { |
6747 | return isa<ConstantArrayType>(CanonicalType); |
6748 | } |
6749 | |
6750 | inline bool Type::isIncompleteArrayType() const { |
6751 | return isa<IncompleteArrayType>(CanonicalType); |
6752 | } |
6753 | |
6754 | inline bool Type::isVariableArrayType() const { |
6755 | return isa<VariableArrayType>(CanonicalType); |
6756 | } |
6757 | |
6758 | inline bool Type::isDependentSizedArrayType() const { |
6759 | return isa<DependentSizedArrayType>(CanonicalType); |
6760 | } |
6761 | |
6762 | inline bool Type::isBuiltinType() const { |
6763 | return isa<BuiltinType>(CanonicalType); |
6764 | } |
6765 | |
6766 | inline bool Type::isRecordType() const { |
6767 | return isa<RecordType>(CanonicalType); |
6768 | } |
6769 | |
6770 | inline bool Type::isEnumeralType() const { |
6771 | return isa<EnumType>(CanonicalType); |
6772 | } |
6773 | |
6774 | inline bool Type::isAnyComplexType() const { |
6775 | return isa<ComplexType>(CanonicalType); |
6776 | } |
6777 | |
6778 | inline bool Type::isVectorType() const { |
6779 | return isa<VectorType>(CanonicalType); |
6780 | } |
6781 | |
6782 | inline bool Type::isExtVectorType() const { |
6783 | return isa<ExtVectorType>(CanonicalType); |
6784 | } |
6785 | |
6786 | inline bool Type::isMatrixType() const { |
6787 | return isa<MatrixType>(CanonicalType); |
6788 | } |
6789 | |
6790 | inline bool Type::isConstantMatrixType() const { |
6791 | return isa<ConstantMatrixType>(CanonicalType); |
6792 | } |
6793 | |
6794 | inline bool Type::isDependentAddressSpaceType() const { |
6795 | return isa<DependentAddressSpaceType>(CanonicalType); |
6796 | } |
6797 | |
6798 | inline bool Type::isObjCObjectPointerType() const { |
6799 | return isa<ObjCObjectPointerType>(CanonicalType); |
6800 | } |
6801 | |
6802 | inline bool Type::isObjCObjectType() const { |
6803 | return isa<ObjCObjectType>(CanonicalType); |
6804 | } |
6805 | |
6806 | inline bool Type::isObjCObjectOrInterfaceType() const { |
6807 | return isa<ObjCInterfaceType>(CanonicalType) || |
6808 | isa<ObjCObjectType>(CanonicalType); |
6809 | } |
6810 | |
6811 | inline bool Type::isAtomicType() const { |
6812 | return isa<AtomicType>(CanonicalType); |
6813 | } |
6814 | |
6815 | inline bool Type::isUndeducedAutoType() const { |
6816 | return isa<AutoType>(CanonicalType); |
6817 | } |
6818 | |
6819 | inline bool Type::isObjCQualifiedIdType() const { |
6820 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6821 | return OPT->isObjCQualifiedIdType(); |
6822 | return false; |
6823 | } |
6824 | |
6825 | inline bool Type::isObjCQualifiedClassType() const { |
6826 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6827 | return OPT->isObjCQualifiedClassType(); |
6828 | return false; |
6829 | } |
6830 | |
6831 | inline bool Type::isObjCIdType() const { |
6832 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6833 | return OPT->isObjCIdType(); |
6834 | return false; |
6835 | } |
6836 | |
6837 | inline bool Type::isObjCClassType() const { |
6838 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6839 | return OPT->isObjCClassType(); |
6840 | return false; |
6841 | } |
6842 | |
6843 | inline bool Type::isObjCSelType() const { |
6844 | if (const auto *OPT = getAs<PointerType>()) |
6845 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); |
6846 | return false; |
6847 | } |
6848 | |
6849 | inline bool Type::isObjCBuiltinType() const { |
6850 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); |
6851 | } |
6852 | |
6853 | inline bool Type::isDecltypeType() const { |
6854 | return isa<DecltypeType>(this); |
6855 | } |
6856 | |
6857 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
6858 | inline bool Type::is##Id##Type() const { \ |
6859 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6860 | } |
6861 | #include "clang/Basic/OpenCLImageTypes.def" |
6862 | |
6863 | inline bool Type::isSamplerT() const { |
6864 | return isSpecificBuiltinType(BuiltinType::OCLSampler); |
6865 | } |
6866 | |
6867 | inline bool Type::isEventT() const { |
6868 | return isSpecificBuiltinType(BuiltinType::OCLEvent); |
6869 | } |
6870 | |
6871 | inline bool Type::isClkEventT() const { |
6872 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); |
6873 | } |
6874 | |
6875 | inline bool Type::isQueueT() const { |
6876 | return isSpecificBuiltinType(BuiltinType::OCLQueue); |
6877 | } |
6878 | |
6879 | inline bool Type::isReserveIDT() const { |
6880 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); |
6881 | } |
6882 | |
6883 | inline bool Type::isImageType() const { |
6884 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || |
6885 | return |
6886 | #include "clang/Basic/OpenCLImageTypes.def" |
6887 | false; // end boolean or operation |
6888 | } |
6889 | |
6890 | inline bool Type::isPipeType() const { |
6891 | return isa<PipeType>(CanonicalType); |
6892 | } |
6893 | |
6894 | inline bool Type::isExtIntType() const { |
6895 | return isa<ExtIntType>(CanonicalType); |
6896 | } |
6897 | |
6898 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
6899 | inline bool Type::is##Id##Type() const { \ |
6900 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6901 | } |
6902 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6903 | |
6904 | inline bool Type::isOCLIntelSubgroupAVCType() const { |
6905 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ |
6906 | isOCLIntelSubgroupAVC##Id##Type() || |
6907 | return |
6908 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6909 | false; // end of boolean or operation |
6910 | } |
6911 | |
6912 | inline bool Type::isOCLExtOpaqueType() const { |
6913 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || |
6914 | return |
6915 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6916 | false; // end of boolean or operation |
6917 | } |
6918 | |
6919 | inline bool Type::isOpenCLSpecificType() const { |
6920 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || |
6921 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); |
6922 | } |
6923 | |
6924 | inline bool Type::isTemplateTypeParmType() const { |
6925 | return isa<TemplateTypeParmType>(CanonicalType); |
6926 | } |
6927 | |
6928 | inline bool Type::isSpecificBuiltinType(unsigned K) const { |
6929 | if (const BuiltinType *BT = getAs<BuiltinType>()) { |
6930 | return BT->getKind() == static_cast<BuiltinType::Kind>(K); |
6931 | } |
6932 | return false; |
6933 | } |
6934 | |
6935 | inline bool Type::isPlaceholderType() const { |
6936 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6937 | return BT->isPlaceholderType(); |
6938 | return false; |
6939 | } |
6940 | |
6941 | inline const BuiltinType *Type::getAsPlaceholderType() const { |
6942 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6943 | if (BT->isPlaceholderType()) |
6944 | return BT; |
6945 | return nullptr; |
6946 | } |
6947 | |
6948 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { |
6949 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))(static_cast <bool> (BuiltinType::isPlaceholderTypeKind ((BuiltinType::Kind) K)) ? void (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 6949, __extension__ __PRETTY_FUNCTION__)); |
6950 | return isSpecificBuiltinType(K); |
6951 | } |
6952 | |
6953 | inline bool Type::isNonOverloadPlaceholderType() const { |
6954 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6955 | return BT->isNonOverloadPlaceholderType(); |
6956 | return false; |
6957 | } |
6958 | |
6959 | inline bool Type::isVoidType() const { |
6960 | return isSpecificBuiltinType(BuiltinType::Void); |
6961 | } |
6962 | |
6963 | inline bool Type::isHalfType() const { |
6964 | // FIXME: Should we allow complex __fp16? Probably not. |
6965 | return isSpecificBuiltinType(BuiltinType::Half); |
6966 | } |
6967 | |
6968 | inline bool Type::isFloat16Type() const { |
6969 | return isSpecificBuiltinType(BuiltinType::Float16); |
6970 | } |
6971 | |
6972 | inline bool Type::isBFloat16Type() const { |
6973 | return isSpecificBuiltinType(BuiltinType::BFloat16); |
6974 | } |
6975 | |
6976 | inline bool Type::isFloat128Type() const { |
6977 | return isSpecificBuiltinType(BuiltinType::Float128); |
6978 | } |
6979 | |
6980 | inline bool Type::isNullPtrType() const { |
6981 | return isSpecificBuiltinType(BuiltinType::NullPtr); |
6982 | } |
6983 | |
6984 | bool IsEnumDeclComplete(EnumDecl *); |
6985 | bool IsEnumDeclScoped(EnumDecl *); |
6986 | |
6987 | inline bool Type::isIntegerType() const { |
6988 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6989 | return BT->getKind() >= BuiltinType::Bool && |
6990 | BT->getKind() <= BuiltinType::Int128; |
6991 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { |
6992 | // Incomplete enum types are not treated as integer types. |
6993 | // FIXME: In C++, enum types are never integer types. |
6994 | return IsEnumDeclComplete(ET->getDecl()) && |
6995 | !IsEnumDeclScoped(ET->getDecl()); |
6996 | } |
6997 | return isExtIntType(); |
6998 | } |
6999 | |
7000 | inline bool Type::isFixedPointType() const { |
7001 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7002 | return BT->getKind() >= BuiltinType::ShortAccum && |
7003 | BT->getKind() <= BuiltinType::SatULongFract; |
7004 | } |
7005 | return false; |
7006 | } |
7007 | |
7008 | inline bool Type::isFixedPointOrIntegerType() const { |
7009 | return isFixedPointType() || isIntegerType(); |
7010 | } |
7011 | |
7012 | inline bool Type::isSaturatedFixedPointType() const { |
7013 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7014 | return BT->getKind() >= BuiltinType::SatShortAccum && |
7015 | BT->getKind() <= BuiltinType::SatULongFract; |
7016 | } |
7017 | return false; |
7018 | } |
7019 | |
7020 | inline bool Type::isUnsaturatedFixedPointType() const { |
7021 | return isFixedPointType() && !isSaturatedFixedPointType(); |
7022 | } |
7023 | |
7024 | inline bool Type::isSignedFixedPointType() const { |
7025 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7026 | return ((BT->getKind() >= BuiltinType::ShortAccum && |
7027 | BT->getKind() <= BuiltinType::LongAccum) || |
7028 | (BT->getKind() >= BuiltinType::ShortFract && |
7029 | BT->getKind() <= BuiltinType::LongFract) || |
7030 | (BT->getKind() >= BuiltinType::SatShortAccum && |
7031 | BT->getKind() <= BuiltinType::SatLongAccum) || |
7032 | (BT->getKind() >= BuiltinType::SatShortFract && |
7033 | BT->getKind() <= BuiltinType::SatLongFract)); |
7034 | } |
7035 | return false; |
7036 | } |
7037 | |
7038 | inline bool Type::isUnsignedFixedPointType() const { |
7039 | return isFixedPointType() && !isSignedFixedPointType(); |
7040 | } |
7041 | |
7042 | inline bool Type::isScalarType() const { |
7043 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7044 | return BT->getKind() > BuiltinType::Void && |
7045 | BT->getKind() <= BuiltinType::NullPtr; |
7046 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) |
7047 | // Enums are scalar types, but only if they are defined. Incomplete enums |
7048 | // are not treated as scalar types. |
7049 | return IsEnumDeclComplete(ET->getDecl()); |
7050 | return isa<PointerType>(CanonicalType) || |
7051 | isa<BlockPointerType>(CanonicalType) || |
7052 | isa<MemberPointerType>(CanonicalType) || |
7053 | isa<ComplexType>(CanonicalType) || |
7054 | isa<ObjCObjectPointerType>(CanonicalType) || |
7055 | isExtIntType(); |
7056 | } |
7057 | |
7058 | inline bool Type::isIntegralOrEnumerationType() const { |
7059 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7060 | return BT->getKind() >= BuiltinType::Bool && |
7061 | BT->getKind() <= BuiltinType::Int128; |
7062 | |
7063 | // Check for a complete enum type; incomplete enum types are not properly an |
7064 | // enumeration type in the sense required here. |
7065 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) |
7066 | return IsEnumDeclComplete(ET->getDecl()); |
7067 | |
7068 | return isExtIntType(); |
7069 | } |
7070 | |
7071 | inline bool Type::isBooleanType() const { |
7072 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7073 | return BT->getKind() == BuiltinType::Bool; |
7074 | return false; |
7075 | } |
7076 | |
7077 | inline bool Type::isUndeducedType() const { |
7078 | auto *DT = getContainedDeducedType(); |
7079 | return DT && !DT->isDeduced(); |
7080 | } |
7081 | |
7082 | /// Determines whether this is a type for which one can define |
7083 | /// an overloaded operator. |
7084 | inline bool Type::isOverloadableType() const { |
7085 | return isDependentType() || isRecordType() || isEnumeralType(); |
7086 | } |
7087 | |
7088 | /// Determines whether this type is written as a typedef-name. |
7089 | inline bool Type::isTypedefNameType() const { |
7090 | if (getAs<TypedefType>()) |
7091 | return true; |
7092 | if (auto *TST = getAs<TemplateSpecializationType>()) |
7093 | return TST->isTypeAlias(); |
7094 | return false; |
7095 | } |
7096 | |
7097 | /// Determines whether this type can decay to a pointer type. |
7098 | inline bool Type::canDecayToPointerType() const { |
7099 | return isFunctionType() || isArrayType(); |
7100 | } |
7101 | |
7102 | inline bool Type::hasPointerRepresentation() const { |
7103 | return (isPointerType() || isReferenceType() || isBlockPointerType() || |
7104 | isObjCObjectPointerType() || isNullPtrType()); |
7105 | } |
7106 | |
7107 | inline bool Type::hasObjCPointerRepresentation() const { |
7108 | return isObjCObjectPointerType(); |
7109 | } |
7110 | |
7111 | inline const Type *Type::getBaseElementTypeUnsafe() const { |
7112 | const Type *type = this; |
7113 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) |
7114 | type = arrayType->getElementType().getTypePtr(); |
7115 | return type; |
7116 | } |
7117 | |
7118 | inline const Type *Type::getPointeeOrArrayElementType() const { |
7119 | const Type *type = this; |
7120 | if (type->isAnyPointerType()) |
7121 | return type->getPointeeType().getTypePtr(); |
7122 | else if (type->isArrayType()) |
7123 | return type->getBaseElementTypeUnsafe(); |
7124 | return type; |
7125 | } |
7126 | /// Insertion operator for partial diagnostics. This allows sending adress |
7127 | /// spaces into a diagnostic with <<. |
7128 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7129 | LangAS AS) { |
7130 | PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), |
7131 | DiagnosticsEngine::ArgumentKind::ak_addrspace); |
7132 | return PD; |
7133 | } |
7134 | |
7135 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers |
7136 | /// into a diagnostic with <<. |
7137 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7138 | Qualifiers Q) { |
7139 | PD.AddTaggedVal(Q.getAsOpaqueValue(), |
7140 | DiagnosticsEngine::ArgumentKind::ak_qual); |
7141 | return PD; |
7142 | } |
7143 | |
7144 | /// Insertion operator for partial diagnostics. This allows sending QualType's |
7145 | /// into a diagnostic with <<. |
7146 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7147 | QualType T) { |
7148 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
7149 | DiagnosticsEngine::ak_qualtype); |
7150 | return PD; |
7151 | } |
7152 | |
7153 | // Helper class template that is used by Type::getAs to ensure that one does |
7154 | // not try to look through a qualified type to get to an array type. |
7155 | template <typename T> |
7156 | using TypeIsArrayType = |
7157 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || |
7158 | std::is_base_of<ArrayType, T>::value>; |
7159 | |
7160 | // Member-template getAs<specific type>'. |
7161 | template <typename T> const T *Type::getAs() const { |
7162 | static_assert(!TypeIsArrayType<T>::value, |
7163 | "ArrayType cannot be used with getAs!"); |
7164 | |
7165 | // If this is directly a T type, return it. |
7166 | if (const auto *Ty = dyn_cast<T>(this)) |
7167 | return Ty; |
7168 | |
7169 | // If the canonical form of this type isn't the right kind, reject it. |
7170 | if (!isa<T>(CanonicalType)) |
7171 | return nullptr; |
7172 | |
7173 | // If this is a typedef for the type, strip the typedef off without |
7174 | // losing all typedef information. |
7175 | return cast<T>(getUnqualifiedDesugaredType()); |
7176 | } |
7177 | |
7178 | template <typename T> const T *Type::getAsAdjusted() const { |
7179 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); |
7180 | |
7181 | // If this is directly a T type, return it. |
7182 | if (const auto *Ty = dyn_cast<T>(this)) |
7183 | return Ty; |
7184 | |
7185 | // If the canonical form of this type isn't the right kind, reject it. |
7186 | if (!isa<T>(CanonicalType)) |
7187 | return nullptr; |
7188 | |
7189 | // Strip off type adjustments that do not modify the underlying nature of the |
7190 | // type. |
7191 | const Type *Ty = this; |
7192 | while (Ty) { |
7193 | if (const auto *A = dyn_cast<AttributedType>(Ty)) |
7194 | Ty = A->getModifiedType().getTypePtr(); |
7195 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) |
7196 | Ty = E->desugar().getTypePtr(); |
7197 | else if (const auto *P = dyn_cast<ParenType>(Ty)) |
7198 | Ty = P->desugar().getTypePtr(); |
7199 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) |
7200 | Ty = A->desugar().getTypePtr(); |
7201 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) |
7202 | Ty = M->desugar().getTypePtr(); |
7203 | else |
7204 | break; |
7205 | } |
7206 | |
7207 | // Just because the canonical type is correct does not mean we can use cast<>, |
7208 | // since we may not have stripped off all the sugar down to the base type. |
7209 | return dyn_cast<T>(Ty); |
7210 | } |
7211 | |
7212 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { |
7213 | // If this is directly an array type, return it. |
7214 | if (const auto *arr = dyn_cast<ArrayType>(this)) |
7215 | return arr; |
7216 | |
7217 | // If the canonical form of this type isn't the right kind, reject it. |
7218 | if (!isa<ArrayType>(CanonicalType)) |
7219 | return nullptr; |
7220 | |
7221 | // If this is a typedef for the type, strip the typedef off without |
7222 | // losing all typedef information. |
7223 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7224 | } |
7225 | |
7226 | template <typename T> const T *Type::castAs() const { |
7227 | static_assert(!TypeIsArrayType<T>::value, |
7228 | "ArrayType cannot be used with castAs!"); |
7229 | |
7230 | if (const auto *ty = dyn_cast<T>(this)) return ty; |
7231 | assert(isa<T>(CanonicalType))(static_cast <bool> (isa<T>(CanonicalType)) ? void (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7231, __extension__ __PRETTY_FUNCTION__)); |
7232 | return cast<T>(getUnqualifiedDesugaredType()); |
7233 | } |
7234 | |
7235 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { |
7236 | assert(isa<ArrayType>(CanonicalType))(static_cast <bool> (isa<ArrayType>(CanonicalType )) ? void (0) : __assert_fail ("isa<ArrayType>(CanonicalType)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7236, __extension__ __PRETTY_FUNCTION__)); |
7237 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; |
7238 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7239 | } |
7240 | |
7241 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, |
7242 | QualType CanonicalPtr) |
7243 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { |
7244 | #ifndef NDEBUG |
7245 | QualType Adjusted = getAdjustedType(); |
7246 | (void)AttributedType::stripOuterNullability(Adjusted); |
7247 | assert(isa<PointerType>(Adjusted))(static_cast <bool> (isa<PointerType>(Adjusted)) ? void (0) : __assert_fail ("isa<PointerType>(Adjusted)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Type.h" , 7247, __extension__ __PRETTY_FUNCTION__)); |
7248 | #endif |
7249 | } |
7250 | |
7251 | QualType DecayedType::getPointeeType() const { |
7252 | QualType Decayed = getDecayedType(); |
7253 | (void)AttributedType::stripOuterNullability(Decayed); |
7254 | return cast<PointerType>(Decayed)->getPointeeType(); |
7255 | } |
7256 | |
7257 | // Get the decimal string representation of a fixed point type, represented |
7258 | // as a scaled integer. |
7259 | // TODO: At some point, we should change the arguments to instead just accept an |
7260 | // APFixedPoint instead of APSInt and scale. |
7261 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, |
7262 | unsigned Scale); |
7263 | |
7264 | } // namespace clang |
7265 | |
7266 | #endif // LLVM_CLANG_AST_TYPE_H |