File: | build/source/clang/lib/Sema/SemaExpr.cpp |
Warning: | line 8018, column 10 Called C++ object pointer is null |
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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/ParentMapContext.h" | |||
29 | #include "clang/AST/RecursiveASTVisitor.h" | |||
30 | #include "clang/AST/Type.h" | |||
31 | #include "clang/AST/TypeLoc.h" | |||
32 | #include "clang/Basic/Builtins.h" | |||
33 | #include "clang/Basic/DiagnosticSema.h" | |||
34 | #include "clang/Basic/PartialDiagnostic.h" | |||
35 | #include "clang/Basic/SourceManager.h" | |||
36 | #include "clang/Basic/Specifiers.h" | |||
37 | #include "clang/Basic/TargetInfo.h" | |||
38 | #include "clang/Lex/LiteralSupport.h" | |||
39 | #include "clang/Lex/Preprocessor.h" | |||
40 | #include "clang/Sema/AnalysisBasedWarnings.h" | |||
41 | #include "clang/Sema/DeclSpec.h" | |||
42 | #include "clang/Sema/DelayedDiagnostic.h" | |||
43 | #include "clang/Sema/Designator.h" | |||
44 | #include "clang/Sema/EnterExpressionEvaluationContext.h" | |||
45 | #include "clang/Sema/Initialization.h" | |||
46 | #include "clang/Sema/Lookup.h" | |||
47 | #include "clang/Sema/Overload.h" | |||
48 | #include "clang/Sema/ParsedTemplate.h" | |||
49 | #include "clang/Sema/Scope.h" | |||
50 | #include "clang/Sema/ScopeInfo.h" | |||
51 | #include "clang/Sema/SemaFixItUtils.h" | |||
52 | #include "clang/Sema/SemaInternal.h" | |||
53 | #include "clang/Sema/Template.h" | |||
54 | #include "llvm/ADT/STLExtras.h" | |||
55 | #include "llvm/ADT/StringExtras.h" | |||
56 | #include "llvm/Support/Casting.h" | |||
57 | #include "llvm/Support/ConvertUTF.h" | |||
58 | #include "llvm/Support/SaveAndRestore.h" | |||
59 | #include "llvm/Support/TypeSize.h" | |||
60 | #include <optional> | |||
61 | ||||
62 | using namespace clang; | |||
63 | using namespace sema; | |||
64 | ||||
65 | /// Determine whether the use of this declaration is valid, without | |||
66 | /// emitting diagnostics. | |||
67 | bool Sema::CanUseDecl(NamedDecl *D, bool TreatUnavailableAsInvalid) { | |||
68 | // See if this is an auto-typed variable whose initializer we are parsing. | |||
69 | if (ParsingInitForAutoVars.count(D)) | |||
70 | return false; | |||
71 | ||||
72 | // See if this is a deleted function. | |||
73 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
74 | if (FD->isDeleted()) | |||
75 | return false; | |||
76 | ||||
77 | // If the function has a deduced return type, and we can't deduce it, | |||
78 | // then we can't use it either. | |||
79 | if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() && | |||
80 | DeduceReturnType(FD, SourceLocation(), /*Diagnose*/ false)) | |||
81 | return false; | |||
82 | ||||
83 | // See if this is an aligned allocation/deallocation function that is | |||
84 | // unavailable. | |||
85 | if (TreatUnavailableAsInvalid && | |||
86 | isUnavailableAlignedAllocationFunction(*FD)) | |||
87 | return false; | |||
88 | } | |||
89 | ||||
90 | // See if this function is unavailable. | |||
91 | if (TreatUnavailableAsInvalid && D->getAvailability() == AR_Unavailable && | |||
92 | cast<Decl>(CurContext)->getAvailability() != AR_Unavailable) | |||
93 | return false; | |||
94 | ||||
95 | if (isa<UnresolvedUsingIfExistsDecl>(D)) | |||
96 | return false; | |||
97 | ||||
98 | return true; | |||
99 | } | |||
100 | ||||
101 | static void DiagnoseUnusedOfDecl(Sema &S, NamedDecl *D, SourceLocation Loc) { | |||
102 | // Warn if this is used but marked unused. | |||
103 | if (const auto *A = D->getAttr<UnusedAttr>()) { | |||
104 | // [[maybe_unused]] should not diagnose uses, but __attribute__((unused)) | |||
105 | // should diagnose them. | |||
106 | if (A->getSemanticSpelling() != UnusedAttr::CXX11_maybe_unused && | |||
107 | A->getSemanticSpelling() != UnusedAttr::C2x_maybe_unused) { | |||
108 | const Decl *DC = cast_or_null<Decl>(S.getCurObjCLexicalContext()); | |||
109 | if (DC && !DC->hasAttr<UnusedAttr>()) | |||
110 | S.Diag(Loc, diag::warn_used_but_marked_unused) << D; | |||
111 | } | |||
112 | } | |||
113 | } | |||
114 | ||||
115 | /// Emit a note explaining that this function is deleted. | |||
116 | void Sema::NoteDeletedFunction(FunctionDecl *Decl) { | |||
117 | assert(Decl && Decl->isDeleted())(static_cast <bool> (Decl && Decl->isDeleted ()) ? void (0) : __assert_fail ("Decl && Decl->isDeleted()" , "clang/lib/Sema/SemaExpr.cpp", 117, __extension__ __PRETTY_FUNCTION__ )); | |||
118 | ||||
119 | if (Decl->isDefaulted()) { | |||
120 | // If the method was explicitly defaulted, point at that declaration. | |||
121 | if (!Decl->isImplicit()) | |||
122 | Diag(Decl->getLocation(), diag::note_implicitly_deleted); | |||
123 | ||||
124 | // Try to diagnose why this special member function was implicitly | |||
125 | // deleted. This might fail, if that reason no longer applies. | |||
126 | DiagnoseDeletedDefaultedFunction(Decl); | |||
127 | return; | |||
128 | } | |||
129 | ||||
130 | auto *Ctor = dyn_cast<CXXConstructorDecl>(Decl); | |||
131 | if (Ctor && Ctor->isInheritingConstructor()) | |||
132 | return NoteDeletedInheritingConstructor(Ctor); | |||
133 | ||||
134 | Diag(Decl->getLocation(), diag::note_availability_specified_here) | |||
135 | << Decl << 1; | |||
136 | } | |||
137 | ||||
138 | /// Determine whether a FunctionDecl was ever declared with an | |||
139 | /// explicit storage class. | |||
140 | static bool hasAnyExplicitStorageClass(const FunctionDecl *D) { | |||
141 | for (auto *I : D->redecls()) { | |||
142 | if (I->getStorageClass() != SC_None) | |||
143 | return true; | |||
144 | } | |||
145 | return false; | |||
146 | } | |||
147 | ||||
148 | /// Check whether we're in an extern inline function and referring to a | |||
149 | /// variable or function with internal linkage (C11 6.7.4p3). | |||
150 | /// | |||
151 | /// This is only a warning because we used to silently accept this code, but | |||
152 | /// in many cases it will not behave correctly. This is not enabled in C++ mode | |||
153 | /// because the restriction language is a bit weaker (C++11 [basic.def.odr]p6) | |||
154 | /// and so while there may still be user mistakes, most of the time we can't | |||
155 | /// prove that there are errors. | |||
156 | static void diagnoseUseOfInternalDeclInInlineFunction(Sema &S, | |||
157 | const NamedDecl *D, | |||
158 | SourceLocation Loc) { | |||
159 | // This is disabled under C++; there are too many ways for this to fire in | |||
160 | // contexts where the warning is a false positive, or where it is technically | |||
161 | // correct but benign. | |||
162 | if (S.getLangOpts().CPlusPlus) | |||
163 | return; | |||
164 | ||||
165 | // Check if this is an inlined function or method. | |||
166 | FunctionDecl *Current = S.getCurFunctionDecl(); | |||
167 | if (!Current) | |||
168 | return; | |||
169 | if (!Current->isInlined()) | |||
170 | return; | |||
171 | if (!Current->isExternallyVisible()) | |||
172 | return; | |||
173 | ||||
174 | // Check if the decl has internal linkage. | |||
175 | if (D->getFormalLinkage() != InternalLinkage) | |||
176 | return; | |||
177 | ||||
178 | // Downgrade from ExtWarn to Extension if | |||
179 | // (1) the supposedly external inline function is in the main file, | |||
180 | // and probably won't be included anywhere else. | |||
181 | // (2) the thing we're referencing is a pure function. | |||
182 | // (3) the thing we're referencing is another inline function. | |||
183 | // This last can give us false negatives, but it's better than warning on | |||
184 | // wrappers for simple C library functions. | |||
185 | const FunctionDecl *UsedFn = dyn_cast<FunctionDecl>(D); | |||
186 | bool DowngradeWarning = S.getSourceManager().isInMainFile(Loc); | |||
187 | if (!DowngradeWarning && UsedFn) | |||
188 | DowngradeWarning = UsedFn->isInlined() || UsedFn->hasAttr<ConstAttr>(); | |||
189 | ||||
190 | S.Diag(Loc, DowngradeWarning ? diag::ext_internal_in_extern_inline_quiet | |||
191 | : diag::ext_internal_in_extern_inline) | |||
192 | << /*IsVar=*/!UsedFn << D; | |||
193 | ||||
194 | S.MaybeSuggestAddingStaticToDecl(Current); | |||
195 | ||||
196 | S.Diag(D->getCanonicalDecl()->getLocation(), diag::note_entity_declared_at) | |||
197 | << D; | |||
198 | } | |||
199 | ||||
200 | void Sema::MaybeSuggestAddingStaticToDecl(const FunctionDecl *Cur) { | |||
201 | const FunctionDecl *First = Cur->getFirstDecl(); | |||
202 | ||||
203 | // Suggest "static" on the function, if possible. | |||
204 | if (!hasAnyExplicitStorageClass(First)) { | |||
205 | SourceLocation DeclBegin = First->getSourceRange().getBegin(); | |||
206 | Diag(DeclBegin, diag::note_convert_inline_to_static) | |||
207 | << Cur << FixItHint::CreateInsertion(DeclBegin, "static "); | |||
208 | } | |||
209 | } | |||
210 | ||||
211 | /// Determine whether the use of this declaration is valid, and | |||
212 | /// emit any corresponding diagnostics. | |||
213 | /// | |||
214 | /// This routine diagnoses various problems with referencing | |||
215 | /// declarations that can occur when using a declaration. For example, | |||
216 | /// it might warn if a deprecated or unavailable declaration is being | |||
217 | /// used, or produce an error (and return true) if a C++0x deleted | |||
218 | /// function is being used. | |||
219 | /// | |||
220 | /// \returns true if there was an error (this declaration cannot be | |||
221 | /// referenced), false otherwise. | |||
222 | /// | |||
223 | bool Sema::DiagnoseUseOfDecl(NamedDecl *D, ArrayRef<SourceLocation> Locs, | |||
224 | const ObjCInterfaceDecl *UnknownObjCClass, | |||
225 | bool ObjCPropertyAccess, | |||
226 | bool AvoidPartialAvailabilityChecks, | |||
227 | ObjCInterfaceDecl *ClassReceiver, | |||
228 | bool SkipTrailingRequiresClause) { | |||
229 | SourceLocation Loc = Locs.front(); | |||
230 | if (getLangOpts().CPlusPlus && isa<FunctionDecl>(D)) { | |||
231 | // If there were any diagnostics suppressed by template argument deduction, | |||
232 | // emit them now. | |||
233 | auto Pos = SuppressedDiagnostics.find(D->getCanonicalDecl()); | |||
234 | if (Pos != SuppressedDiagnostics.end()) { | |||
235 | for (const PartialDiagnosticAt &Suppressed : Pos->second) | |||
236 | Diag(Suppressed.first, Suppressed.second); | |||
237 | ||||
238 | // Clear out the list of suppressed diagnostics, so that we don't emit | |||
239 | // them again for this specialization. However, we don't obsolete this | |||
240 | // entry from the table, because we want to avoid ever emitting these | |||
241 | // diagnostics again. | |||
242 | Pos->second.clear(); | |||
243 | } | |||
244 | ||||
245 | // C++ [basic.start.main]p3: | |||
246 | // The function 'main' shall not be used within a program. | |||
247 | if (cast<FunctionDecl>(D)->isMain()) | |||
248 | Diag(Loc, diag::ext_main_used); | |||
249 | ||||
250 | diagnoseUnavailableAlignedAllocation(*cast<FunctionDecl>(D), Loc); | |||
251 | } | |||
252 | ||||
253 | // See if this is an auto-typed variable whose initializer we are parsing. | |||
254 | if (ParsingInitForAutoVars.count(D)) { | |||
255 | if (isa<BindingDecl>(D)) { | |||
256 | Diag(Loc, diag::err_binding_cannot_appear_in_own_initializer) | |||
257 | << D->getDeclName(); | |||
258 | } else { | |||
259 | Diag(Loc, diag::err_auto_variable_cannot_appear_in_own_initializer) | |||
260 | << D->getDeclName() << cast<VarDecl>(D)->getType(); | |||
261 | } | |||
262 | return true; | |||
263 | } | |||
264 | ||||
265 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
266 | // See if this is a deleted function. | |||
267 | if (FD->isDeleted()) { | |||
268 | auto *Ctor = dyn_cast<CXXConstructorDecl>(FD); | |||
269 | if (Ctor && Ctor->isInheritingConstructor()) | |||
270 | Diag(Loc, diag::err_deleted_inherited_ctor_use) | |||
271 | << Ctor->getParent() | |||
272 | << Ctor->getInheritedConstructor().getConstructor()->getParent(); | |||
273 | else | |||
274 | Diag(Loc, diag::err_deleted_function_use); | |||
275 | NoteDeletedFunction(FD); | |||
276 | return true; | |||
277 | } | |||
278 | ||||
279 | // [expr.prim.id]p4 | |||
280 | // A program that refers explicitly or implicitly to a function with a | |||
281 | // trailing requires-clause whose constraint-expression is not satisfied, | |||
282 | // other than to declare it, is ill-formed. [...] | |||
283 | // | |||
284 | // See if this is a function with constraints that need to be satisfied. | |||
285 | // Check this before deducing the return type, as it might instantiate the | |||
286 | // definition. | |||
287 | if (!SkipTrailingRequiresClause && FD->getTrailingRequiresClause()) { | |||
288 | ConstraintSatisfaction Satisfaction; | |||
289 | if (CheckFunctionConstraints(FD, Satisfaction, Loc, | |||
290 | /*ForOverloadResolution*/ true)) | |||
291 | // A diagnostic will have already been generated (non-constant | |||
292 | // constraint expression, for example) | |||
293 | return true; | |||
294 | if (!Satisfaction.IsSatisfied) { | |||
295 | Diag(Loc, | |||
296 | diag::err_reference_to_function_with_unsatisfied_constraints) | |||
297 | << D; | |||
298 | DiagnoseUnsatisfiedConstraint(Satisfaction); | |||
299 | return true; | |||
300 | } | |||
301 | } | |||
302 | ||||
303 | // If the function has a deduced return type, and we can't deduce it, | |||
304 | // then we can't use it either. | |||
305 | if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() && | |||
306 | DeduceReturnType(FD, Loc)) | |||
307 | return true; | |||
308 | ||||
309 | if (getLangOpts().CUDA && !CheckCUDACall(Loc, FD)) | |||
310 | return true; | |||
311 | ||||
312 | } | |||
313 | ||||
314 | if (auto *MD = dyn_cast<CXXMethodDecl>(D)) { | |||
315 | // Lambdas are only default-constructible or assignable in C++2a onwards. | |||
316 | if (MD->getParent()->isLambda() && | |||
317 | ((isa<CXXConstructorDecl>(MD) && | |||
318 | cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) || | |||
319 | MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())) { | |||
320 | Diag(Loc, diag::warn_cxx17_compat_lambda_def_ctor_assign) | |||
321 | << !isa<CXXConstructorDecl>(MD); | |||
322 | } | |||
323 | } | |||
324 | ||||
325 | auto getReferencedObjCProp = [](const NamedDecl *D) -> | |||
326 | const ObjCPropertyDecl * { | |||
327 | if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) | |||
328 | return MD->findPropertyDecl(); | |||
329 | return nullptr; | |||
330 | }; | |||
331 | if (const ObjCPropertyDecl *ObjCPDecl = getReferencedObjCProp(D)) { | |||
332 | if (diagnoseArgIndependentDiagnoseIfAttrs(ObjCPDecl, Loc)) | |||
333 | return true; | |||
334 | } else if (diagnoseArgIndependentDiagnoseIfAttrs(D, Loc)) { | |||
335 | return true; | |||
336 | } | |||
337 | ||||
338 | // [OpenMP 4.0], 2.15 declare reduction Directive, Restrictions | |||
339 | // Only the variables omp_in and omp_out are allowed in the combiner. | |||
340 | // Only the variables omp_priv and omp_orig are allowed in the | |||
341 | // initializer-clause. | |||
342 | auto *DRD = dyn_cast<OMPDeclareReductionDecl>(CurContext); | |||
343 | if (LangOpts.OpenMP && DRD && !CurContext->containsDecl(D) && | |||
344 | isa<VarDecl>(D)) { | |||
345 | Diag(Loc, diag::err_omp_wrong_var_in_declare_reduction) | |||
346 | << getCurFunction()->HasOMPDeclareReductionCombiner; | |||
347 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
348 | return true; | |||
349 | } | |||
350 | ||||
351 | // [OpenMP 5.0], 2.19.7.3. declare mapper Directive, Restrictions | |||
352 | // List-items in map clauses on this construct may only refer to the declared | |||
353 | // variable var and entities that could be referenced by a procedure defined | |||
354 | // at the same location. | |||
355 | // [OpenMP 5.2] Also allow iterator declared variables. | |||
356 | if (LangOpts.OpenMP && isa<VarDecl>(D) && | |||
357 | !isOpenMPDeclareMapperVarDeclAllowed(cast<VarDecl>(D))) { | |||
358 | Diag(Loc, diag::err_omp_declare_mapper_wrong_var) | |||
359 | << getOpenMPDeclareMapperVarName(); | |||
360 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
361 | return true; | |||
362 | } | |||
363 | ||||
364 | if (const auto *EmptyD = dyn_cast<UnresolvedUsingIfExistsDecl>(D)) { | |||
365 | Diag(Loc, diag::err_use_of_empty_using_if_exists); | |||
366 | Diag(EmptyD->getLocation(), diag::note_empty_using_if_exists_here); | |||
367 | return true; | |||
368 | } | |||
369 | ||||
370 | DiagnoseAvailabilityOfDecl(D, Locs, UnknownObjCClass, ObjCPropertyAccess, | |||
371 | AvoidPartialAvailabilityChecks, ClassReceiver); | |||
372 | ||||
373 | DiagnoseUnusedOfDecl(*this, D, Loc); | |||
374 | ||||
375 | diagnoseUseOfInternalDeclInInlineFunction(*this, D, Loc); | |||
376 | ||||
377 | if (auto *VD = dyn_cast<ValueDecl>(D)) | |||
378 | checkTypeSupport(VD->getType(), Loc, VD); | |||
379 | ||||
380 | if (LangOpts.SYCLIsDevice || (LangOpts.OpenMP && LangOpts.OpenMPIsDevice)) { | |||
381 | if (!Context.getTargetInfo().isTLSSupported()) | |||
382 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
383 | if (VD->getTLSKind() != VarDecl::TLS_None) | |||
384 | targetDiag(*Locs.begin(), diag::err_thread_unsupported); | |||
385 | } | |||
386 | ||||
387 | if (isa<ParmVarDecl>(D) && isa<RequiresExprBodyDecl>(D->getDeclContext()) && | |||
388 | !isUnevaluatedContext()) { | |||
389 | // C++ [expr.prim.req.nested] p3 | |||
390 | // A local parameter shall only appear as an unevaluated operand | |||
391 | // (Clause 8) within the constraint-expression. | |||
392 | Diag(Loc, diag::err_requires_expr_parameter_referenced_in_evaluated_context) | |||
393 | << D; | |||
394 | Diag(D->getLocation(), diag::note_entity_declared_at) << D; | |||
395 | return true; | |||
396 | } | |||
397 | ||||
398 | return false; | |||
399 | } | |||
400 | ||||
401 | /// DiagnoseSentinelCalls - This routine checks whether a call or | |||
402 | /// message-send is to a declaration with the sentinel attribute, and | |||
403 | /// if so, it checks that the requirements of the sentinel are | |||
404 | /// satisfied. | |||
405 | void Sema::DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, | |||
406 | ArrayRef<Expr *> Args) { | |||
407 | const SentinelAttr *attr = D->getAttr<SentinelAttr>(); | |||
408 | if (!attr) | |||
409 | return; | |||
410 | ||||
411 | // The number of formal parameters of the declaration. | |||
412 | unsigned numFormalParams; | |||
413 | ||||
414 | // The kind of declaration. This is also an index into a %select in | |||
415 | // the diagnostic. | |||
416 | enum CalleeType { CT_Function, CT_Method, CT_Block } calleeType; | |||
417 | ||||
418 | if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { | |||
419 | numFormalParams = MD->param_size(); | |||
420 | calleeType = CT_Method; | |||
421 | } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | |||
422 | numFormalParams = FD->param_size(); | |||
423 | calleeType = CT_Function; | |||
424 | } else if (isa<VarDecl>(D)) { | |||
425 | QualType type = cast<ValueDecl>(D)->getType(); | |||
426 | const FunctionType *fn = nullptr; | |||
427 | if (const PointerType *ptr = type->getAs<PointerType>()) { | |||
428 | fn = ptr->getPointeeType()->getAs<FunctionType>(); | |||
429 | if (!fn) return; | |||
430 | calleeType = CT_Function; | |||
431 | } else if (const BlockPointerType *ptr = type->getAs<BlockPointerType>()) { | |||
432 | fn = ptr->getPointeeType()->castAs<FunctionType>(); | |||
433 | calleeType = CT_Block; | |||
434 | } else { | |||
435 | return; | |||
436 | } | |||
437 | ||||
438 | if (const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(fn)) { | |||
439 | numFormalParams = proto->getNumParams(); | |||
440 | } else { | |||
441 | numFormalParams = 0; | |||
442 | } | |||
443 | } else { | |||
444 | return; | |||
445 | } | |||
446 | ||||
447 | // "nullPos" is the number of formal parameters at the end which | |||
448 | // effectively count as part of the variadic arguments. This is | |||
449 | // useful if you would prefer to not have *any* formal parameters, | |||
450 | // but the language forces you to have at least one. | |||
451 | unsigned nullPos = attr->getNullPos(); | |||
452 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 452, __extension__ __PRETTY_FUNCTION__ )); | |||
453 | numFormalParams = (nullPos > numFormalParams ? 0 : numFormalParams - nullPos); | |||
454 | ||||
455 | // The number of arguments which should follow the sentinel. | |||
456 | unsigned numArgsAfterSentinel = attr->getSentinel(); | |||
457 | ||||
458 | // If there aren't enough arguments for all the formal parameters, | |||
459 | // the sentinel, and the args after the sentinel, complain. | |||
460 | if (Args.size() < numFormalParams + numArgsAfterSentinel + 1) { | |||
461 | Diag(Loc, diag::warn_not_enough_argument) << D->getDeclName(); | |||
462 | Diag(D->getLocation(), diag::note_sentinel_here) << int(calleeType); | |||
463 | return; | |||
464 | } | |||
465 | ||||
466 | // Otherwise, find the sentinel expression. | |||
467 | Expr *sentinelExpr = Args[Args.size() - numArgsAfterSentinel - 1]; | |||
468 | if (!sentinelExpr) return; | |||
469 | if (sentinelExpr->isValueDependent()) return; | |||
470 | if (Context.isSentinelNullExpr(sentinelExpr)) return; | |||
471 | ||||
472 | // Pick a reasonable string to insert. Optimistically use 'nil', 'nullptr', | |||
473 | // or 'NULL' if those are actually defined in the context. Only use | |||
474 | // 'nil' for ObjC methods, where it's much more likely that the | |||
475 | // variadic arguments form a list of object pointers. | |||
476 | SourceLocation MissingNilLoc = getLocForEndOfToken(sentinelExpr->getEndLoc()); | |||
477 | std::string NullValue; | |||
478 | if (calleeType == CT_Method && PP.isMacroDefined("nil")) | |||
479 | NullValue = "nil"; | |||
480 | else if (getLangOpts().CPlusPlus11) | |||
481 | NullValue = "nullptr"; | |||
482 | else if (PP.isMacroDefined("NULL")) | |||
483 | NullValue = "NULL"; | |||
484 | else | |||
485 | NullValue = "(void*) 0"; | |||
486 | ||||
487 | if (MissingNilLoc.isInvalid()) | |||
488 | Diag(Loc, diag::warn_missing_sentinel) << int(calleeType); | |||
489 | else | |||
490 | Diag(MissingNilLoc, diag::warn_missing_sentinel) | |||
491 | << int(calleeType) | |||
492 | << FixItHint::CreateInsertion(MissingNilLoc, ", " + NullValue); | |||
493 | Diag(D->getLocation(), diag::note_sentinel_here) << int(calleeType); | |||
494 | } | |||
495 | ||||
496 | SourceRange Sema::getExprRange(Expr *E) const { | |||
497 | return E ? E->getSourceRange() : SourceRange(); | |||
498 | } | |||
499 | ||||
500 | //===----------------------------------------------------------------------===// | |||
501 | // Standard Promotions and Conversions | |||
502 | //===----------------------------------------------------------------------===// | |||
503 | ||||
504 | /// DefaultFunctionArrayConversion (C99 6.3.2.1p3, C99 6.3.2.1p4). | |||
505 | ExprResult Sema::DefaultFunctionArrayConversion(Expr *E, bool Diagnose) { | |||
506 | // Handle any placeholder expressions which made it here. | |||
507 | if (E->hasPlaceholderType()) { | |||
508 | ExprResult result = CheckPlaceholderExpr(E); | |||
509 | if (result.isInvalid()) return ExprError(); | |||
510 | E = result.get(); | |||
511 | } | |||
512 | ||||
513 | QualType Ty = E->getType(); | |||
514 | assert(!Ty.isNull() && "DefaultFunctionArrayConversion - missing type")(static_cast <bool> (!Ty.isNull() && "DefaultFunctionArrayConversion - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"DefaultFunctionArrayConversion - missing type\"" , "clang/lib/Sema/SemaExpr.cpp", 514, __extension__ __PRETTY_FUNCTION__ )); | |||
515 | ||||
516 | if (Ty->isFunctionType()) { | |||
517 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts())) | |||
518 | if (auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl())) | |||
519 | if (!checkAddressOfFunctionIsAvailable(FD, Diagnose, E->getExprLoc())) | |||
520 | return ExprError(); | |||
521 | ||||
522 | E = ImpCastExprToType(E, Context.getPointerType(Ty), | |||
523 | CK_FunctionToPointerDecay).get(); | |||
524 | } else if (Ty->isArrayType()) { | |||
525 | // In C90 mode, arrays only promote to pointers if the array expression is | |||
526 | // an lvalue. The relevant legalese is C90 6.2.2.1p3: "an lvalue that has | |||
527 | // type 'array of type' is converted to an expression that has type 'pointer | |||
528 | // to type'...". In C99 this was changed to: C99 6.3.2.1p3: "an expression | |||
529 | // that has type 'array of type' ...". The relevant change is "an lvalue" | |||
530 | // (C90) to "an expression" (C99). | |||
531 | // | |||
532 | // C++ 4.2p1: | |||
533 | // An lvalue or rvalue of type "array of N T" or "array of unknown bound of | |||
534 | // T" can be converted to an rvalue of type "pointer to T". | |||
535 | // | |||
536 | if (getLangOpts().C99 || getLangOpts().CPlusPlus || E->isLValue()) { | |||
537 | ExprResult Res = ImpCastExprToType(E, Context.getArrayDecayedType(Ty), | |||
538 | CK_ArrayToPointerDecay); | |||
539 | if (Res.isInvalid()) | |||
540 | return ExprError(); | |||
541 | E = Res.get(); | |||
542 | } | |||
543 | } | |||
544 | return E; | |||
545 | } | |||
546 | ||||
547 | static void CheckForNullPointerDereference(Sema &S, Expr *E) { | |||
548 | // Check to see if we are dereferencing a null pointer. If so, | |||
549 | // and if not volatile-qualified, this is undefined behavior that the | |||
550 | // optimizer will delete, so warn about it. People sometimes try to use this | |||
551 | // to get a deterministic trap and are surprised by clang's behavior. This | |||
552 | // only handles the pattern "*null", which is a very syntactic check. | |||
553 | const auto *UO = dyn_cast<UnaryOperator>(E->IgnoreParenCasts()); | |||
554 | if (UO && UO->getOpcode() == UO_Deref && | |||
555 | UO->getSubExpr()->getType()->isPointerType()) { | |||
556 | const LangAS AS = | |||
557 | UO->getSubExpr()->getType()->getPointeeType().getAddressSpace(); | |||
558 | if ((!isTargetAddressSpace(AS) || | |||
559 | (isTargetAddressSpace(AS) && toTargetAddressSpace(AS) == 0)) && | |||
560 | UO->getSubExpr()->IgnoreParenCasts()->isNullPointerConstant( | |||
561 | S.Context, Expr::NPC_ValueDependentIsNotNull) && | |||
562 | !UO->getType().isVolatileQualified()) { | |||
563 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | |||
564 | S.PDiag(diag::warn_indirection_through_null) | |||
565 | << UO->getSubExpr()->getSourceRange()); | |||
566 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | |||
567 | S.PDiag(diag::note_indirection_through_null)); | |||
568 | } | |||
569 | } | |||
570 | } | |||
571 | ||||
572 | static void DiagnoseDirectIsaAccess(Sema &S, const ObjCIvarRefExpr *OIRE, | |||
573 | SourceLocation AssignLoc, | |||
574 | const Expr* RHS) { | |||
575 | const ObjCIvarDecl *IV = OIRE->getDecl(); | |||
576 | if (!IV) | |||
577 | return; | |||
578 | ||||
579 | DeclarationName MemberName = IV->getDeclName(); | |||
580 | IdentifierInfo *Member = MemberName.getAsIdentifierInfo(); | |||
581 | if (!Member || !Member->isStr("isa")) | |||
582 | return; | |||
583 | ||||
584 | const Expr *Base = OIRE->getBase(); | |||
585 | QualType BaseType = Base->getType(); | |||
586 | if (OIRE->isArrow()) | |||
587 | BaseType = BaseType->getPointeeType(); | |||
588 | if (const ObjCObjectType *OTy = BaseType->getAs<ObjCObjectType>()) | |||
589 | if (ObjCInterfaceDecl *IDecl = OTy->getInterface()) { | |||
590 | ObjCInterfaceDecl *ClassDeclared = nullptr; | |||
591 | ObjCIvarDecl *IV = IDecl->lookupInstanceVariable(Member, ClassDeclared); | |||
592 | if (!ClassDeclared->getSuperClass() | |||
593 | && (*ClassDeclared->ivar_begin()) == IV) { | |||
594 | if (RHS) { | |||
595 | NamedDecl *ObjectSetClass = | |||
596 | S.LookupSingleName(S.TUScope, | |||
597 | &S.Context.Idents.get("object_setClass"), | |||
598 | SourceLocation(), S.LookupOrdinaryName); | |||
599 | if (ObjectSetClass) { | |||
600 | SourceLocation RHSLocEnd = S.getLocForEndOfToken(RHS->getEndLoc()); | |||
601 | S.Diag(OIRE->getExprLoc(), diag::warn_objc_isa_assign) | |||
602 | << FixItHint::CreateInsertion(OIRE->getBeginLoc(), | |||
603 | "object_setClass(") | |||
604 | << FixItHint::CreateReplacement( | |||
605 | SourceRange(OIRE->getOpLoc(), AssignLoc), ",") | |||
606 | << FixItHint::CreateInsertion(RHSLocEnd, ")"); | |||
607 | } | |||
608 | else | |||
609 | S.Diag(OIRE->getLocation(), diag::warn_objc_isa_assign); | |||
610 | } else { | |||
611 | NamedDecl *ObjectGetClass = | |||
612 | S.LookupSingleName(S.TUScope, | |||
613 | &S.Context.Idents.get("object_getClass"), | |||
614 | SourceLocation(), S.LookupOrdinaryName); | |||
615 | if (ObjectGetClass) | |||
616 | S.Diag(OIRE->getExprLoc(), diag::warn_objc_isa_use) | |||
617 | << FixItHint::CreateInsertion(OIRE->getBeginLoc(), | |||
618 | "object_getClass(") | |||
619 | << FixItHint::CreateReplacement( | |||
620 | SourceRange(OIRE->getOpLoc(), OIRE->getEndLoc()), ")"); | |||
621 | else | |||
622 | S.Diag(OIRE->getLocation(), diag::warn_objc_isa_use); | |||
623 | } | |||
624 | S.Diag(IV->getLocation(), diag::note_ivar_decl); | |||
625 | } | |||
626 | } | |||
627 | } | |||
628 | ||||
629 | ExprResult Sema::DefaultLvalueConversion(Expr *E) { | |||
630 | // Handle any placeholder expressions which made it here. | |||
631 | if (E->hasPlaceholderType()) { | |||
632 | ExprResult result = CheckPlaceholderExpr(E); | |||
633 | if (result.isInvalid()) return ExprError(); | |||
634 | E = result.get(); | |||
635 | } | |||
636 | ||||
637 | // C++ [conv.lval]p1: | |||
638 | // A glvalue of a non-function, non-array type T can be | |||
639 | // converted to a prvalue. | |||
640 | if (!E->isGLValue()) return E; | |||
641 | ||||
642 | QualType T = E->getType(); | |||
643 | 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?\"" , "clang/lib/Sema/SemaExpr.cpp", 643, __extension__ __PRETTY_FUNCTION__ )); | |||
644 | ||||
645 | // lvalue-to-rvalue conversion cannot be applied to function or array types. | |||
646 | if (T->isFunctionType() || T->isArrayType()) | |||
647 | return E; | |||
648 | ||||
649 | // We don't want to throw lvalue-to-rvalue casts on top of | |||
650 | // expressions of certain types in C++. | |||
651 | if (getLangOpts().CPlusPlus && | |||
652 | (E->getType() == Context.OverloadTy || | |||
653 | T->isDependentType() || | |||
654 | T->isRecordType())) | |||
655 | return E; | |||
656 | ||||
657 | // The C standard is actually really unclear on this point, and | |||
658 | // DR106 tells us what the result should be but not why. It's | |||
659 | // generally best to say that void types just doesn't undergo | |||
660 | // lvalue-to-rvalue at all. Note that expressions of unqualified | |||
661 | // 'void' type are never l-values, but qualified void can be. | |||
662 | if (T->isVoidType()) | |||
663 | return E; | |||
664 | ||||
665 | // OpenCL usually rejects direct accesses to values of 'half' type. | |||
666 | if (getLangOpts().OpenCL && | |||
667 | !getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts()) && | |||
668 | T->isHalfType()) { | |||
669 | Diag(E->getExprLoc(), diag::err_opencl_half_load_store) | |||
670 | << 0 << T; | |||
671 | return ExprError(); | |||
672 | } | |||
673 | ||||
674 | CheckForNullPointerDereference(*this, E); | |||
675 | if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(E->IgnoreParenCasts())) { | |||
676 | NamedDecl *ObjectGetClass = LookupSingleName(TUScope, | |||
677 | &Context.Idents.get("object_getClass"), | |||
678 | SourceLocation(), LookupOrdinaryName); | |||
679 | if (ObjectGetClass) | |||
680 | Diag(E->getExprLoc(), diag::warn_objc_isa_use) | |||
681 | << FixItHint::CreateInsertion(OISA->getBeginLoc(), "object_getClass(") | |||
682 | << FixItHint::CreateReplacement( | |||
683 | SourceRange(OISA->getOpLoc(), OISA->getIsaMemberLoc()), ")"); | |||
684 | else | |||
685 | Diag(E->getExprLoc(), diag::warn_objc_isa_use); | |||
686 | } | |||
687 | else if (const ObjCIvarRefExpr *OIRE = | |||
688 | dyn_cast<ObjCIvarRefExpr>(E->IgnoreParenCasts())) | |||
689 | DiagnoseDirectIsaAccess(*this, OIRE, SourceLocation(), /* Expr*/nullptr); | |||
690 | ||||
691 | // C++ [conv.lval]p1: | |||
692 | // [...] If T is a non-class type, the type of the prvalue is the | |||
693 | // cv-unqualified version of T. Otherwise, the type of the | |||
694 | // rvalue is T. | |||
695 | // | |||
696 | // C99 6.3.2.1p2: | |||
697 | // If the lvalue has qualified type, the value has the unqualified | |||
698 | // version of the type of the lvalue; otherwise, the value has the | |||
699 | // type of the lvalue. | |||
700 | if (T.hasQualifiers()) | |||
701 | T = T.getUnqualifiedType(); | |||
702 | ||||
703 | // Under the MS ABI, lock down the inheritance model now. | |||
704 | if (T->isMemberPointerType() && | |||
705 | Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
706 | (void)isCompleteType(E->getExprLoc(), T); | |||
707 | ||||
708 | ExprResult Res = CheckLValueToRValueConversionOperand(E); | |||
709 | if (Res.isInvalid()) | |||
710 | return Res; | |||
711 | E = Res.get(); | |||
712 | ||||
713 | // Loading a __weak object implicitly retains the value, so we need a cleanup to | |||
714 | // balance that. | |||
715 | if (E->getType().getObjCLifetime() == Qualifiers::OCL_Weak) | |||
716 | Cleanup.setExprNeedsCleanups(true); | |||
717 | ||||
718 | if (E->getType().isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
719 | Cleanup.setExprNeedsCleanups(true); | |||
720 | ||||
721 | // C++ [conv.lval]p3: | |||
722 | // If T is cv std::nullptr_t, the result is a null pointer constant. | |||
723 | CastKind CK = T->isNullPtrType() ? CK_NullToPointer : CK_LValueToRValue; | |||
724 | Res = ImplicitCastExpr::Create(Context, T, CK, E, nullptr, VK_PRValue, | |||
725 | CurFPFeatureOverrides()); | |||
726 | ||||
727 | // C11 6.3.2.1p2: | |||
728 | // ... if the lvalue has atomic type, the value has the non-atomic version | |||
729 | // of the type of the lvalue ... | |||
730 | if (const AtomicType *Atomic = T->getAs<AtomicType>()) { | |||
731 | T = Atomic->getValueType().getUnqualifiedType(); | |||
732 | Res = ImplicitCastExpr::Create(Context, T, CK_AtomicToNonAtomic, Res.get(), | |||
733 | nullptr, VK_PRValue, FPOptionsOverride()); | |||
734 | } | |||
735 | ||||
736 | return Res; | |||
737 | } | |||
738 | ||||
739 | ExprResult Sema::DefaultFunctionArrayLvalueConversion(Expr *E, bool Diagnose) { | |||
740 | ExprResult Res = DefaultFunctionArrayConversion(E, Diagnose); | |||
741 | if (Res.isInvalid()) | |||
742 | return ExprError(); | |||
743 | Res = DefaultLvalueConversion(Res.get()); | |||
744 | if (Res.isInvalid()) | |||
745 | return ExprError(); | |||
746 | return Res; | |||
747 | } | |||
748 | ||||
749 | /// CallExprUnaryConversions - a special case of an unary conversion | |||
750 | /// performed on a function designator of a call expression. | |||
751 | ExprResult Sema::CallExprUnaryConversions(Expr *E) { | |||
752 | QualType Ty = E->getType(); | |||
753 | ExprResult Res = E; | |||
754 | // Only do implicit cast for a function type, but not for a pointer | |||
755 | // to function type. | |||
756 | if (Ty->isFunctionType()) { | |||
757 | Res = ImpCastExprToType(E, Context.getPointerType(Ty), | |||
758 | CK_FunctionToPointerDecay); | |||
759 | if (Res.isInvalid()) | |||
760 | return ExprError(); | |||
761 | } | |||
762 | Res = DefaultLvalueConversion(Res.get()); | |||
763 | if (Res.isInvalid()) | |||
764 | return ExprError(); | |||
765 | return Res.get(); | |||
766 | } | |||
767 | ||||
768 | /// UsualUnaryConversions - Performs various conversions that are common to most | |||
769 | /// operators (C99 6.3). The conversions of array and function types are | |||
770 | /// sometimes suppressed. For example, the array->pointer conversion doesn't | |||
771 | /// apply if the array is an argument to the sizeof or address (&) operators. | |||
772 | /// In these instances, this routine should *not* be called. | |||
773 | ExprResult Sema::UsualUnaryConversions(Expr *E) { | |||
774 | // First, convert to an r-value. | |||
775 | ExprResult Res = DefaultFunctionArrayLvalueConversion(E); | |||
776 | if (Res.isInvalid()) | |||
777 | return ExprError(); | |||
778 | E = Res.get(); | |||
779 | ||||
780 | QualType Ty = E->getType(); | |||
781 | assert(!Ty.isNull() && "UsualUnaryConversions - missing type")(static_cast <bool> (!Ty.isNull() && "UsualUnaryConversions - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"UsualUnaryConversions - missing type\"" , "clang/lib/Sema/SemaExpr.cpp", 781, __extension__ __PRETTY_FUNCTION__ )); | |||
782 | ||||
783 | LangOptions::FPEvalMethodKind EvalMethod = CurFPFeatures.getFPEvalMethod(); | |||
784 | if (EvalMethod != LangOptions::FEM_Source && Ty->isFloatingType() && | |||
785 | (getLangOpts().getFPEvalMethod() != | |||
786 | LangOptions::FPEvalMethodKind::FEM_UnsetOnCommandLine || | |||
787 | PP.getLastFPEvalPragmaLocation().isValid())) { | |||
788 | switch (EvalMethod) { | |||
789 | default: | |||
790 | llvm_unreachable("Unrecognized float evaluation method")::llvm::llvm_unreachable_internal("Unrecognized float evaluation method" , "clang/lib/Sema/SemaExpr.cpp", 790); | |||
791 | break; | |||
792 | case LangOptions::FEM_UnsetOnCommandLine: | |||
793 | llvm_unreachable("Float evaluation method should be set by now")::llvm::llvm_unreachable_internal("Float evaluation method should be set by now" , "clang/lib/Sema/SemaExpr.cpp", 793); | |||
794 | break; | |||
795 | case LangOptions::FEM_Double: | |||
796 | if (Context.getFloatingTypeOrder(Context.DoubleTy, Ty) > 0) | |||
797 | // Widen the expression to double. | |||
798 | return Ty->isComplexType() | |||
799 | ? ImpCastExprToType(E, | |||
800 | Context.getComplexType(Context.DoubleTy), | |||
801 | CK_FloatingComplexCast) | |||
802 | : ImpCastExprToType(E, Context.DoubleTy, CK_FloatingCast); | |||
803 | break; | |||
804 | case LangOptions::FEM_Extended: | |||
805 | if (Context.getFloatingTypeOrder(Context.LongDoubleTy, Ty) > 0) | |||
806 | // Widen the expression to long double. | |||
807 | return Ty->isComplexType() | |||
808 | ? ImpCastExprToType( | |||
809 | E, Context.getComplexType(Context.LongDoubleTy), | |||
810 | CK_FloatingComplexCast) | |||
811 | : ImpCastExprToType(E, Context.LongDoubleTy, | |||
812 | CK_FloatingCast); | |||
813 | break; | |||
814 | } | |||
815 | } | |||
816 | ||||
817 | // Half FP have to be promoted to float unless it is natively supported | |||
818 | if (Ty->isHalfType() && !getLangOpts().NativeHalfType) | |||
819 | return ImpCastExprToType(Res.get(), Context.FloatTy, CK_FloatingCast); | |||
820 | ||||
821 | // Try to perform integral promotions if the object has a theoretically | |||
822 | // promotable type. | |||
823 | if (Ty->isIntegralOrUnscopedEnumerationType()) { | |||
824 | // C99 6.3.1.1p2: | |||
825 | // | |||
826 | // The following may be used in an expression wherever an int or | |||
827 | // unsigned int may be used: | |||
828 | // - an object or expression with an integer type whose integer | |||
829 | // conversion rank is less than or equal to the rank of int | |||
830 | // and unsigned int. | |||
831 | // - A bit-field of type _Bool, int, signed int, or unsigned int. | |||
832 | // | |||
833 | // If an int can represent all values of the original type, the | |||
834 | // value is converted to an int; otherwise, it is converted to an | |||
835 | // unsigned int. These are called the integer promotions. All | |||
836 | // other types are unchanged by the integer promotions. | |||
837 | ||||
838 | QualType PTy = Context.isPromotableBitField(E); | |||
839 | if (!PTy.isNull()) { | |||
840 | E = ImpCastExprToType(E, PTy, CK_IntegralCast).get(); | |||
841 | return E; | |||
842 | } | |||
843 | if (Context.isPromotableIntegerType(Ty)) { | |||
844 | QualType PT = Context.getPromotedIntegerType(Ty); | |||
845 | E = ImpCastExprToType(E, PT, CK_IntegralCast).get(); | |||
846 | return E; | |||
847 | } | |||
848 | } | |||
849 | return E; | |||
850 | } | |||
851 | ||||
852 | /// DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that | |||
853 | /// do not have a prototype. Arguments that have type float or __fp16 | |||
854 | /// are promoted to double. All other argument types are converted by | |||
855 | /// UsualUnaryConversions(). | |||
856 | ExprResult Sema::DefaultArgumentPromotion(Expr *E) { | |||
857 | QualType Ty = E->getType(); | |||
858 | assert(!Ty.isNull() && "DefaultArgumentPromotion - missing type")(static_cast <bool> (!Ty.isNull() && "DefaultArgumentPromotion - missing type" ) ? void (0) : __assert_fail ("!Ty.isNull() && \"DefaultArgumentPromotion - missing type\"" , "clang/lib/Sema/SemaExpr.cpp", 858, __extension__ __PRETTY_FUNCTION__ )); | |||
859 | ||||
860 | ExprResult Res = UsualUnaryConversions(E); | |||
861 | if (Res.isInvalid()) | |||
862 | return ExprError(); | |||
863 | E = Res.get(); | |||
864 | ||||
865 | // If this is a 'float' or '__fp16' (CVR qualified or typedef) | |||
866 | // promote to double. | |||
867 | // Note that default argument promotion applies only to float (and | |||
868 | // half/fp16); it does not apply to _Float16. | |||
869 | const BuiltinType *BTy = Ty->getAs<BuiltinType>(); | |||
870 | if (BTy && (BTy->getKind() == BuiltinType::Half || | |||
871 | BTy->getKind() == BuiltinType::Float)) { | |||
872 | if (getLangOpts().OpenCL && | |||
873 | !getOpenCLOptions().isAvailableOption("cl_khr_fp64", getLangOpts())) { | |||
874 | if (BTy->getKind() == BuiltinType::Half) { | |||
875 | E = ImpCastExprToType(E, Context.FloatTy, CK_FloatingCast).get(); | |||
876 | } | |||
877 | } else { | |||
878 | E = ImpCastExprToType(E, Context.DoubleTy, CK_FloatingCast).get(); | |||
879 | } | |||
880 | } | |||
881 | if (BTy && | |||
882 | getLangOpts().getExtendIntArgs() == | |||
883 | LangOptions::ExtendArgsKind::ExtendTo64 && | |||
884 | Context.getTargetInfo().supportsExtendIntArgs() && Ty->isIntegerType() && | |||
885 | Context.getTypeSizeInChars(BTy) < | |||
886 | Context.getTypeSizeInChars(Context.LongLongTy)) { | |||
887 | E = (Ty->isUnsignedIntegerType()) | |||
888 | ? ImpCastExprToType(E, Context.UnsignedLongLongTy, CK_IntegralCast) | |||
889 | .get() | |||
890 | : ImpCastExprToType(E, Context.LongLongTy, CK_IntegralCast).get(); | |||
891 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 892, __extension__ __PRETTY_FUNCTION__ )) | |||
892 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 892, __extension__ __PRETTY_FUNCTION__ )); | |||
893 | } | |||
894 | ||||
895 | // C++ performs lvalue-to-rvalue conversion as a default argument | |||
896 | // promotion, even on class types, but note: | |||
897 | // C++11 [conv.lval]p2: | |||
898 | // When an lvalue-to-rvalue conversion occurs in an unevaluated | |||
899 | // operand or a subexpression thereof the value contained in the | |||
900 | // referenced object is not accessed. Otherwise, if the glvalue | |||
901 | // has a class type, the conversion copy-initializes a temporary | |||
902 | // of type T from the glvalue and the result of the conversion | |||
903 | // is a prvalue for the temporary. | |||
904 | // FIXME: add some way to gate this entire thing for correctness in | |||
905 | // potentially potentially evaluated contexts. | |||
906 | if (getLangOpts().CPlusPlus && E->isGLValue() && !isUnevaluatedContext()) { | |||
907 | ExprResult Temp = PerformCopyInitialization( | |||
908 | InitializedEntity::InitializeTemporary(E->getType()), | |||
909 | E->getExprLoc(), E); | |||
910 | if (Temp.isInvalid()) | |||
911 | return ExprError(); | |||
912 | E = Temp.get(); | |||
913 | } | |||
914 | ||||
915 | return E; | |||
916 | } | |||
917 | ||||
918 | /// Determine the degree of POD-ness for an expression. | |||
919 | /// Incomplete types are considered POD, since this check can be performed | |||
920 | /// when we're in an unevaluated context. | |||
921 | Sema::VarArgKind Sema::isValidVarArgType(const QualType &Ty) { | |||
922 | if (Ty->isIncompleteType()) { | |||
923 | // C++11 [expr.call]p7: | |||
924 | // After these conversions, if the argument does not have arithmetic, | |||
925 | // enumeration, pointer, pointer to member, or class type, the program | |||
926 | // is ill-formed. | |||
927 | // | |||
928 | // Since we've already performed array-to-pointer and function-to-pointer | |||
929 | // decay, the only such type in C++ is cv void. This also handles | |||
930 | // initializer lists as variadic arguments. | |||
931 | if (Ty->isVoidType()) | |||
932 | return VAK_Invalid; | |||
933 | ||||
934 | if (Ty->isObjCObjectType()) | |||
935 | return VAK_Invalid; | |||
936 | return VAK_Valid; | |||
937 | } | |||
938 | ||||
939 | if (Ty.isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
940 | return VAK_Invalid; | |||
941 | ||||
942 | if (Context.getTargetInfo().getTriple().isWasm() && | |||
943 | Ty->isWebAssemblyReferenceType()) { | |||
944 | return VAK_Invalid; | |||
945 | } | |||
946 | ||||
947 | if (Ty.isCXX98PODType(Context)) | |||
948 | return VAK_Valid; | |||
949 | ||||
950 | // C++11 [expr.call]p7: | |||
951 | // Passing a potentially-evaluated argument of class type (Clause 9) | |||
952 | // having a non-trivial copy constructor, a non-trivial move constructor, | |||
953 | // or a non-trivial destructor, with no corresponding parameter, | |||
954 | // is conditionally-supported with implementation-defined semantics. | |||
955 | if (getLangOpts().CPlusPlus11 && !Ty->isDependentType()) | |||
956 | if (CXXRecordDecl *Record = Ty->getAsCXXRecordDecl()) | |||
957 | if (!Record->hasNonTrivialCopyConstructor() && | |||
958 | !Record->hasNonTrivialMoveConstructor() && | |||
959 | !Record->hasNonTrivialDestructor()) | |||
960 | return VAK_ValidInCXX11; | |||
961 | ||||
962 | if (getLangOpts().ObjCAutoRefCount && Ty->isObjCLifetimeType()) | |||
963 | return VAK_Valid; | |||
964 | ||||
965 | if (Ty->isObjCObjectType()) | |||
966 | return VAK_Invalid; | |||
967 | ||||
968 | if (getLangOpts().MSVCCompat) | |||
969 | return VAK_MSVCUndefined; | |||
970 | ||||
971 | // FIXME: In C++11, these cases are conditionally-supported, meaning we're | |||
972 | // permitted to reject them. We should consider doing so. | |||
973 | return VAK_Undefined; | |||
974 | } | |||
975 | ||||
976 | void Sema::checkVariadicArgument(const Expr *E, VariadicCallType CT) { | |||
977 | // Don't allow one to pass an Objective-C interface to a vararg. | |||
978 | const QualType &Ty = E->getType(); | |||
979 | VarArgKind VAK = isValidVarArgType(Ty); | |||
980 | ||||
981 | // Complain about passing non-POD types through varargs. | |||
982 | switch (VAK) { | |||
983 | case VAK_ValidInCXX11: | |||
984 | DiagRuntimeBehavior( | |||
985 | E->getBeginLoc(), nullptr, | |||
986 | PDiag(diag::warn_cxx98_compat_pass_non_pod_arg_to_vararg) << Ty << CT); | |||
987 | [[fallthrough]]; | |||
988 | case VAK_Valid: | |||
989 | if (Ty->isRecordType()) { | |||
990 | // This is unlikely to be what the user intended. If the class has a | |||
991 | // 'c_str' member function, the user probably meant to call that. | |||
992 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
993 | PDiag(diag::warn_pass_class_arg_to_vararg) | |||
994 | << Ty << CT << hasCStrMethod(E) << ".c_str()"); | |||
995 | } | |||
996 | break; | |||
997 | ||||
998 | case VAK_Undefined: | |||
999 | case VAK_MSVCUndefined: | |||
1000 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
1001 | PDiag(diag::warn_cannot_pass_non_pod_arg_to_vararg) | |||
1002 | << getLangOpts().CPlusPlus11 << Ty << CT); | |||
1003 | break; | |||
1004 | ||||
1005 | case VAK_Invalid: | |||
1006 | if (Ty.isDestructedType() == QualType::DK_nontrivial_c_struct) | |||
1007 | Diag(E->getBeginLoc(), | |||
1008 | diag::err_cannot_pass_non_trivial_c_struct_to_vararg) | |||
1009 | << Ty << CT; | |||
1010 | else if (Ty->isObjCObjectType()) | |||
1011 | DiagRuntimeBehavior(E->getBeginLoc(), nullptr, | |||
1012 | PDiag(diag::err_cannot_pass_objc_interface_to_vararg) | |||
1013 | << Ty << CT); | |||
1014 | else | |||
1015 | Diag(E->getBeginLoc(), diag::err_cannot_pass_to_vararg) | |||
1016 | << isa<InitListExpr>(E) << Ty << CT; | |||
1017 | break; | |||
1018 | } | |||
1019 | } | |||
1020 | ||||
1021 | /// DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but | |||
1022 | /// will create a trap if the resulting type is not a POD type. | |||
1023 | ExprResult Sema::DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, | |||
1024 | FunctionDecl *FDecl) { | |||
1025 | if (const BuiltinType *PlaceholderTy = E->getType()->getAsPlaceholderType()) { | |||
1026 | // Strip the unbridged-cast placeholder expression off, if applicable. | |||
1027 | if (PlaceholderTy->getKind() == BuiltinType::ARCUnbridgedCast && | |||
1028 | (CT == VariadicMethod || | |||
1029 | (FDecl && FDecl->hasAttr<CFAuditedTransferAttr>()))) { | |||
1030 | E = stripARCUnbridgedCast(E); | |||
1031 | ||||
1032 | // Otherwise, do normal placeholder checking. | |||
1033 | } else { | |||
1034 | ExprResult ExprRes = CheckPlaceholderExpr(E); | |||
1035 | if (ExprRes.isInvalid()) | |||
1036 | return ExprError(); | |||
1037 | E = ExprRes.get(); | |||
1038 | } | |||
1039 | } | |||
1040 | ||||
1041 | ExprResult ExprRes = DefaultArgumentPromotion(E); | |||
1042 | if (ExprRes.isInvalid()) | |||
1043 | return ExprError(); | |||
1044 | ||||
1045 | // Copy blocks to the heap. | |||
1046 | if (ExprRes.get()->getType()->isBlockPointerType()) | |||
1047 | maybeExtendBlockObject(ExprRes); | |||
1048 | ||||
1049 | E = ExprRes.get(); | |||
1050 | ||||
1051 | // Diagnostics regarding non-POD argument types are | |||
1052 | // emitted along with format string checking in Sema::CheckFunctionCall(). | |||
1053 | if (isValidVarArgType(E->getType()) == VAK_Undefined) { | |||
1054 | // Turn this into a trap. | |||
1055 | CXXScopeSpec SS; | |||
1056 | SourceLocation TemplateKWLoc; | |||
1057 | UnqualifiedId Name; | |||
1058 | Name.setIdentifier(PP.getIdentifierInfo("__builtin_trap"), | |||
1059 | E->getBeginLoc()); | |||
1060 | ExprResult TrapFn = ActOnIdExpression(TUScope, SS, TemplateKWLoc, Name, | |||
1061 | /*HasTrailingLParen=*/true, | |||
1062 | /*IsAddressOfOperand=*/false); | |||
1063 | if (TrapFn.isInvalid()) | |||
1064 | return ExprError(); | |||
1065 | ||||
1066 | ExprResult Call = BuildCallExpr(TUScope, TrapFn.get(), E->getBeginLoc(), | |||
1067 | std::nullopt, E->getEndLoc()); | |||
1068 | if (Call.isInvalid()) | |||
1069 | return ExprError(); | |||
1070 | ||||
1071 | ExprResult Comma = | |||
1072 | ActOnBinOp(TUScope, E->getBeginLoc(), tok::comma, Call.get(), E); | |||
1073 | if (Comma.isInvalid()) | |||
1074 | return ExprError(); | |||
1075 | return Comma.get(); | |||
1076 | } | |||
1077 | ||||
1078 | if (!getLangOpts().CPlusPlus && | |||
1079 | RequireCompleteType(E->getExprLoc(), E->getType(), | |||
1080 | diag::err_call_incomplete_argument)) | |||
1081 | return ExprError(); | |||
1082 | ||||
1083 | return E; | |||
1084 | } | |||
1085 | ||||
1086 | /// Converts an integer to complex float type. Helper function of | |||
1087 | /// UsualArithmeticConversions() | |||
1088 | /// | |||
1089 | /// \return false if the integer expression is an integer type and is | |||
1090 | /// successfully converted to the complex type. | |||
1091 | static bool handleIntegerToComplexFloatConversion(Sema &S, ExprResult &IntExpr, | |||
1092 | ExprResult &ComplexExpr, | |||
1093 | QualType IntTy, | |||
1094 | QualType ComplexTy, | |||
1095 | bool SkipCast) { | |||
1096 | if (IntTy->isComplexType() || IntTy->isRealFloatingType()) return true; | |||
1097 | if (SkipCast) return false; | |||
1098 | if (IntTy->isIntegerType()) { | |||
1099 | QualType fpTy = ComplexTy->castAs<ComplexType>()->getElementType(); | |||
1100 | IntExpr = S.ImpCastExprToType(IntExpr.get(), fpTy, CK_IntegralToFloating); | |||
1101 | IntExpr = S.ImpCastExprToType(IntExpr.get(), ComplexTy, | |||
1102 | CK_FloatingRealToComplex); | |||
1103 | } else { | |||
1104 | assert(IntTy->isComplexIntegerType())(static_cast <bool> (IntTy->isComplexIntegerType()) ? void (0) : __assert_fail ("IntTy->isComplexIntegerType()" , "clang/lib/Sema/SemaExpr.cpp", 1104, __extension__ __PRETTY_FUNCTION__ )); | |||
1105 | IntExpr = S.ImpCastExprToType(IntExpr.get(), ComplexTy, | |||
1106 | CK_IntegralComplexToFloatingComplex); | |||
1107 | } | |||
1108 | return false; | |||
1109 | } | |||
1110 | ||||
1111 | // This handles complex/complex, complex/float, or float/complex. | |||
1112 | // When both operands are complex, the shorter operand is converted to the | |||
1113 | // type of the longer, and that is the type of the result. This corresponds | |||
1114 | // to what is done when combining two real floating-point operands. | |||
1115 | // The fun begins when size promotion occur across type domains. | |||
1116 | // From H&S 6.3.4: When one operand is complex and the other is a real | |||
1117 | // floating-point type, the less precise type is converted, within it's | |||
1118 | // real or complex domain, to the precision of the other type. For example, | |||
1119 | // when combining a "long double" with a "double _Complex", the | |||
1120 | // "double _Complex" is promoted to "long double _Complex". | |||
1121 | static QualType handleComplexFloatConversion(Sema &S, ExprResult &Shorter, | |||
1122 | QualType ShorterType, | |||
1123 | QualType LongerType, | |||
1124 | bool PromotePrecision) { | |||
1125 | bool LongerIsComplex = isa<ComplexType>(LongerType.getCanonicalType()); | |||
1126 | QualType Result = | |||
1127 | LongerIsComplex ? LongerType : S.Context.getComplexType(LongerType); | |||
1128 | ||||
1129 | if (PromotePrecision) { | |||
1130 | if (isa<ComplexType>(ShorterType.getCanonicalType())) { | |||
1131 | Shorter = | |||
1132 | S.ImpCastExprToType(Shorter.get(), Result, CK_FloatingComplexCast); | |||
1133 | } else { | |||
1134 | if (LongerIsComplex) | |||
1135 | LongerType = LongerType->castAs<ComplexType>()->getElementType(); | |||
1136 | Shorter = S.ImpCastExprToType(Shorter.get(), LongerType, CK_FloatingCast); | |||
1137 | } | |||
1138 | } | |||
1139 | return Result; | |||
1140 | } | |||
1141 | ||||
1142 | /// Handle arithmetic conversion with complex types. Helper function of | |||
1143 | /// UsualArithmeticConversions() | |||
1144 | static QualType handleComplexConversion(Sema &S, ExprResult &LHS, | |||
1145 | ExprResult &RHS, QualType LHSType, | |||
1146 | QualType RHSType, bool IsCompAssign) { | |||
1147 | // if we have an integer operand, the result is the complex type. | |||
1148 | if (!handleIntegerToComplexFloatConversion(S, RHS, LHS, RHSType, LHSType, | |||
1149 | /*SkipCast=*/false)) | |||
1150 | return LHSType; | |||
1151 | if (!handleIntegerToComplexFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
1152 | /*SkipCast=*/IsCompAssign)) | |||
1153 | return RHSType; | |||
1154 | ||||
1155 | // Compute the rank of the two types, regardless of whether they are complex. | |||
1156 | int Order = S.Context.getFloatingTypeOrder(LHSType, RHSType); | |||
1157 | if (Order < 0) | |||
1158 | // Promote the precision of the LHS if not an assignment. | |||
1159 | return handleComplexFloatConversion(S, LHS, LHSType, RHSType, | |||
1160 | /*PromotePrecision=*/!IsCompAssign); | |||
1161 | // Promote the precision of the RHS unless it is already the same as the LHS. | |||
1162 | return handleComplexFloatConversion(S, RHS, RHSType, LHSType, | |||
1163 | /*PromotePrecision=*/Order > 0); | |||
1164 | } | |||
1165 | ||||
1166 | /// Handle arithmetic conversion from integer to float. Helper function | |||
1167 | /// of UsualArithmeticConversions() | |||
1168 | static QualType handleIntToFloatConversion(Sema &S, ExprResult &FloatExpr, | |||
1169 | ExprResult &IntExpr, | |||
1170 | QualType FloatTy, QualType IntTy, | |||
1171 | bool ConvertFloat, bool ConvertInt) { | |||
1172 | if (IntTy->isIntegerType()) { | |||
1173 | if (ConvertInt) | |||
1174 | // Convert intExpr to the lhs floating point type. | |||
1175 | IntExpr = S.ImpCastExprToType(IntExpr.get(), FloatTy, | |||
1176 | CK_IntegralToFloating); | |||
1177 | return FloatTy; | |||
1178 | } | |||
1179 | ||||
1180 | // Convert both sides to the appropriate complex float. | |||
1181 | assert(IntTy->isComplexIntegerType())(static_cast <bool> (IntTy->isComplexIntegerType()) ? void (0) : __assert_fail ("IntTy->isComplexIntegerType()" , "clang/lib/Sema/SemaExpr.cpp", 1181, __extension__ __PRETTY_FUNCTION__ )); | |||
1182 | QualType result = S.Context.getComplexType(FloatTy); | |||
1183 | ||||
1184 | // _Complex int -> _Complex float | |||
1185 | if (ConvertInt) | |||
1186 | IntExpr = S.ImpCastExprToType(IntExpr.get(), result, | |||
1187 | CK_IntegralComplexToFloatingComplex); | |||
1188 | ||||
1189 | // float -> _Complex float | |||
1190 | if (ConvertFloat) | |||
1191 | FloatExpr = S.ImpCastExprToType(FloatExpr.get(), result, | |||
1192 | CK_FloatingRealToComplex); | |||
1193 | ||||
1194 | return result; | |||
1195 | } | |||
1196 | ||||
1197 | /// Handle arithmethic conversion with floating point types. Helper | |||
1198 | /// function of UsualArithmeticConversions() | |||
1199 | static QualType handleFloatConversion(Sema &S, ExprResult &LHS, | |||
1200 | ExprResult &RHS, QualType LHSType, | |||
1201 | QualType RHSType, bool IsCompAssign) { | |||
1202 | bool LHSFloat = LHSType->isRealFloatingType(); | |||
1203 | bool RHSFloat = RHSType->isRealFloatingType(); | |||
1204 | ||||
1205 | // N1169 4.1.4: If one of the operands has a floating type and the other | |||
1206 | // operand has a fixed-point type, the fixed-point operand | |||
1207 | // is converted to the floating type [...] | |||
1208 | if (LHSType->isFixedPointType() || RHSType->isFixedPointType()) { | |||
1209 | if (LHSFloat) | |||
1210 | RHS = S.ImpCastExprToType(RHS.get(), LHSType, CK_FixedPointToFloating); | |||
1211 | else if (!IsCompAssign) | |||
1212 | LHS = S.ImpCastExprToType(LHS.get(), RHSType, CK_FixedPointToFloating); | |||
1213 | return LHSFloat ? LHSType : RHSType; | |||
1214 | } | |||
1215 | ||||
1216 | // If we have two real floating types, convert the smaller operand | |||
1217 | // to the bigger result. | |||
1218 | if (LHSFloat && RHSFloat) { | |||
1219 | int order = S.Context.getFloatingTypeOrder(LHSType, RHSType); | |||
1220 | if (order > 0) { | |||
1221 | RHS = S.ImpCastExprToType(RHS.get(), LHSType, CK_FloatingCast); | |||
1222 | return LHSType; | |||
1223 | } | |||
1224 | ||||
1225 | assert(order < 0 && "illegal float comparison")(static_cast <bool> (order < 0 && "illegal float comparison" ) ? void (0) : __assert_fail ("order < 0 && \"illegal float comparison\"" , "clang/lib/Sema/SemaExpr.cpp", 1225, __extension__ __PRETTY_FUNCTION__ )); | |||
1226 | if (!IsCompAssign) | |||
1227 | LHS = S.ImpCastExprToType(LHS.get(), RHSType, CK_FloatingCast); | |||
1228 | return RHSType; | |||
1229 | } | |||
1230 | ||||
1231 | if (LHSFloat) { | |||
1232 | // Half FP has to be promoted to float unless it is natively supported | |||
1233 | if (LHSType->isHalfType() && !S.getLangOpts().NativeHalfType) | |||
1234 | LHSType = S.Context.FloatTy; | |||
1235 | ||||
1236 | return handleIntToFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
1237 | /*ConvertFloat=*/!IsCompAssign, | |||
1238 | /*ConvertInt=*/ true); | |||
1239 | } | |||
1240 | assert(RHSFloat)(static_cast <bool> (RHSFloat) ? void (0) : __assert_fail ("RHSFloat", "clang/lib/Sema/SemaExpr.cpp", 1240, __extension__ __PRETTY_FUNCTION__)); | |||
1241 | return handleIntToFloatConversion(S, RHS, LHS, RHSType, LHSType, | |||
1242 | /*ConvertFloat=*/ true, | |||
1243 | /*ConvertInt=*/!IsCompAssign); | |||
1244 | } | |||
1245 | ||||
1246 | /// Diagnose attempts to convert between __float128, __ibm128 and | |||
1247 | /// long double if there is no support for such conversion. | |||
1248 | /// Helper function of UsualArithmeticConversions(). | |||
1249 | static bool unsupportedTypeConversion(const Sema &S, QualType LHSType, | |||
1250 | QualType RHSType) { | |||
1251 | // No issue if either is not a floating point type. | |||
1252 | if (!LHSType->isFloatingType() || !RHSType->isFloatingType()) | |||
1253 | return false; | |||
1254 | ||||
1255 | // No issue if both have the same 128-bit float semantics. | |||
1256 | auto *LHSComplex = LHSType->getAs<ComplexType>(); | |||
1257 | auto *RHSComplex = RHSType->getAs<ComplexType>(); | |||
1258 | ||||
1259 | QualType LHSElem = LHSComplex ? LHSComplex->getElementType() : LHSType; | |||
1260 | QualType RHSElem = RHSComplex ? RHSComplex->getElementType() : RHSType; | |||
1261 | ||||
1262 | const llvm::fltSemantics &LHSSem = S.Context.getFloatTypeSemantics(LHSElem); | |||
1263 | const llvm::fltSemantics &RHSSem = S.Context.getFloatTypeSemantics(RHSElem); | |||
1264 | ||||
1265 | if ((&LHSSem != &llvm::APFloat::PPCDoubleDouble() || | |||
1266 | &RHSSem != &llvm::APFloat::IEEEquad()) && | |||
1267 | (&LHSSem != &llvm::APFloat::IEEEquad() || | |||
1268 | &RHSSem != &llvm::APFloat::PPCDoubleDouble())) | |||
1269 | return false; | |||
1270 | ||||
1271 | return true; | |||
1272 | } | |||
1273 | ||||
1274 | typedef ExprResult PerformCastFn(Sema &S, Expr *operand, QualType toType); | |||
1275 | ||||
1276 | namespace { | |||
1277 | /// These helper callbacks are placed in an anonymous namespace to | |||
1278 | /// permit their use as function template parameters. | |||
1279 | ExprResult doIntegralCast(Sema &S, Expr *op, QualType toType) { | |||
1280 | return S.ImpCastExprToType(op, toType, CK_IntegralCast); | |||
1281 | } | |||
1282 | ||||
1283 | ExprResult doComplexIntegralCast(Sema &S, Expr *op, QualType toType) { | |||
1284 | return S.ImpCastExprToType(op, S.Context.getComplexType(toType), | |||
1285 | CK_IntegralComplexCast); | |||
1286 | } | |||
1287 | } | |||
1288 | ||||
1289 | /// Handle integer arithmetic conversions. Helper function of | |||
1290 | /// UsualArithmeticConversions() | |||
1291 | template <PerformCastFn doLHSCast, PerformCastFn doRHSCast> | |||
1292 | static QualType handleIntegerConversion(Sema &S, ExprResult &LHS, | |||
1293 | ExprResult &RHS, QualType LHSType, | |||
1294 | QualType RHSType, bool IsCompAssign) { | |||
1295 | // The rules for this case are in C99 6.3.1.8 | |||
1296 | int order = S.Context.getIntegerTypeOrder(LHSType, RHSType); | |||
1297 | bool LHSSigned = LHSType->hasSignedIntegerRepresentation(); | |||
1298 | bool RHSSigned = RHSType->hasSignedIntegerRepresentation(); | |||
1299 | if (LHSSigned == RHSSigned) { | |||
1300 | // Same signedness; use the higher-ranked type | |||
1301 | if (order >= 0) { | |||
1302 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1303 | return LHSType; | |||
1304 | } else if (!IsCompAssign) | |||
1305 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1306 | return RHSType; | |||
1307 | } else if (order != (LHSSigned ? 1 : -1)) { | |||
1308 | // The unsigned type has greater than or equal rank to the | |||
1309 | // signed type, so use the unsigned type | |||
1310 | if (RHSSigned) { | |||
1311 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1312 | return LHSType; | |||
1313 | } else if (!IsCompAssign) | |||
1314 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1315 | return RHSType; | |||
1316 | } else if (S.Context.getIntWidth(LHSType) != S.Context.getIntWidth(RHSType)) { | |||
1317 | // The two types are different widths; if we are here, that | |||
1318 | // means the signed type is larger than the unsigned type, so | |||
1319 | // use the signed type. | |||
1320 | if (LHSSigned) { | |||
1321 | RHS = (*doRHSCast)(S, RHS.get(), LHSType); | |||
1322 | return LHSType; | |||
1323 | } else if (!IsCompAssign) | |||
1324 | LHS = (*doLHSCast)(S, LHS.get(), RHSType); | |||
1325 | return RHSType; | |||
1326 | } else { | |||
1327 | // The signed type is higher-ranked than the unsigned type, | |||
1328 | // but isn't actually any bigger (like unsigned int and long | |||
1329 | // on most 32-bit systems). Use the unsigned type corresponding | |||
1330 | // to the signed type. | |||
1331 | QualType result = | |||
1332 | S.Context.getCorrespondingUnsignedType(LHSSigned ? LHSType : RHSType); | |||
1333 | RHS = (*doRHSCast)(S, RHS.get(), result); | |||
1334 | if (!IsCompAssign) | |||
1335 | LHS = (*doLHSCast)(S, LHS.get(), result); | |||
1336 | return result; | |||
1337 | } | |||
1338 | } | |||
1339 | ||||
1340 | /// Handle conversions with GCC complex int extension. Helper function | |||
1341 | /// of UsualArithmeticConversions() | |||
1342 | static QualType handleComplexIntConversion(Sema &S, ExprResult &LHS, | |||
1343 | ExprResult &RHS, QualType LHSType, | |||
1344 | QualType RHSType, | |||
1345 | bool IsCompAssign) { | |||
1346 | const ComplexType *LHSComplexInt = LHSType->getAsComplexIntegerType(); | |||
1347 | const ComplexType *RHSComplexInt = RHSType->getAsComplexIntegerType(); | |||
1348 | ||||
1349 | if (LHSComplexInt && RHSComplexInt) { | |||
1350 | QualType LHSEltType = LHSComplexInt->getElementType(); | |||
1351 | QualType RHSEltType = RHSComplexInt->getElementType(); | |||
1352 | QualType ScalarType = | |||
1353 | handleIntegerConversion<doComplexIntegralCast, doComplexIntegralCast> | |||
1354 | (S, LHS, RHS, LHSEltType, RHSEltType, IsCompAssign); | |||
1355 | ||||
1356 | return S.Context.getComplexType(ScalarType); | |||
1357 | } | |||
1358 | ||||
1359 | if (LHSComplexInt) { | |||
1360 | QualType LHSEltType = LHSComplexInt->getElementType(); | |||
1361 | QualType ScalarType = | |||
1362 | handleIntegerConversion<doComplexIntegralCast, doIntegralCast> | |||
1363 | (S, LHS, RHS, LHSEltType, RHSType, IsCompAssign); | |||
1364 | QualType ComplexType = S.Context.getComplexType(ScalarType); | |||
1365 | RHS = S.ImpCastExprToType(RHS.get(), ComplexType, | |||
1366 | CK_IntegralRealToComplex); | |||
1367 | ||||
1368 | return ComplexType; | |||
1369 | } | |||
1370 | ||||
1371 | assert(RHSComplexInt)(static_cast <bool> (RHSComplexInt) ? void (0) : __assert_fail ("RHSComplexInt", "clang/lib/Sema/SemaExpr.cpp", 1371, __extension__ __PRETTY_FUNCTION__)); | |||
1372 | ||||
1373 | QualType RHSEltType = RHSComplexInt->getElementType(); | |||
1374 | QualType ScalarType = | |||
1375 | handleIntegerConversion<doIntegralCast, doComplexIntegralCast> | |||
1376 | (S, LHS, RHS, LHSType, RHSEltType, IsCompAssign); | |||
1377 | QualType ComplexType = S.Context.getComplexType(ScalarType); | |||
1378 | ||||
1379 | if (!IsCompAssign) | |||
1380 | LHS = S.ImpCastExprToType(LHS.get(), ComplexType, | |||
1381 | CK_IntegralRealToComplex); | |||
1382 | return ComplexType; | |||
1383 | } | |||
1384 | ||||
1385 | /// Return the rank of a given fixed point or integer type. The value itself | |||
1386 | /// doesn't matter, but the values must be increasing with proper increasing | |||
1387 | /// rank as described in N1169 4.1.1. | |||
1388 | static unsigned GetFixedPointRank(QualType Ty) { | |||
1389 | const auto *BTy = Ty->getAs<BuiltinType>(); | |||
1390 | assert(BTy && "Expected a builtin type.")(static_cast <bool> (BTy && "Expected a builtin type." ) ? void (0) : __assert_fail ("BTy && \"Expected a builtin type.\"" , "clang/lib/Sema/SemaExpr.cpp", 1390, __extension__ __PRETTY_FUNCTION__ )); | |||
1391 | ||||
1392 | switch (BTy->getKind()) { | |||
1393 | case BuiltinType::ShortFract: | |||
1394 | case BuiltinType::UShortFract: | |||
1395 | case BuiltinType::SatShortFract: | |||
1396 | case BuiltinType::SatUShortFract: | |||
1397 | return 1; | |||
1398 | case BuiltinType::Fract: | |||
1399 | case BuiltinType::UFract: | |||
1400 | case BuiltinType::SatFract: | |||
1401 | case BuiltinType::SatUFract: | |||
1402 | return 2; | |||
1403 | case BuiltinType::LongFract: | |||
1404 | case BuiltinType::ULongFract: | |||
1405 | case BuiltinType::SatLongFract: | |||
1406 | case BuiltinType::SatULongFract: | |||
1407 | return 3; | |||
1408 | case BuiltinType::ShortAccum: | |||
1409 | case BuiltinType::UShortAccum: | |||
1410 | case BuiltinType::SatShortAccum: | |||
1411 | case BuiltinType::SatUShortAccum: | |||
1412 | return 4; | |||
1413 | case BuiltinType::Accum: | |||
1414 | case BuiltinType::UAccum: | |||
1415 | case BuiltinType::SatAccum: | |||
1416 | case BuiltinType::SatUAccum: | |||
1417 | return 5; | |||
1418 | case BuiltinType::LongAccum: | |||
1419 | case BuiltinType::ULongAccum: | |||
1420 | case BuiltinType::SatLongAccum: | |||
1421 | case BuiltinType::SatULongAccum: | |||
1422 | return 6; | |||
1423 | default: | |||
1424 | if (BTy->isInteger()) | |||
1425 | return 0; | |||
1426 | llvm_unreachable("Unexpected fixed point or integer type")::llvm::llvm_unreachable_internal("Unexpected fixed point or integer type" , "clang/lib/Sema/SemaExpr.cpp", 1426); | |||
1427 | } | |||
1428 | } | |||
1429 | ||||
1430 | /// handleFixedPointConversion - Fixed point operations between fixed | |||
1431 | /// point types and integers or other fixed point types do not fall under | |||
1432 | /// usual arithmetic conversion since these conversions could result in loss | |||
1433 | /// of precsision (N1169 4.1.4). These operations should be calculated with | |||
1434 | /// the full precision of their result type (N1169 4.1.6.2.1). | |||
1435 | static QualType handleFixedPointConversion(Sema &S, QualType LHSTy, | |||
1436 | QualType RHSTy) { | |||
1437 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 1438, __extension__ __PRETTY_FUNCTION__ )) | |||
1438 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 1438, __extension__ __PRETTY_FUNCTION__ )); | |||
1439 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 1442, __extension__ __PRETTY_FUNCTION__ )) | |||
1440 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 1442, __extension__ __PRETTY_FUNCTION__ )) | |||
1441 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 1442, __extension__ __PRETTY_FUNCTION__ )) | |||
1442 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 1442, __extension__ __PRETTY_FUNCTION__ )); | |||
1443 | ||||
1444 | // If one operand has signed fixed-point type and the other operand has | |||
1445 | // unsigned fixed-point type, then the unsigned fixed-point operand is | |||
1446 | // converted to its corresponding signed fixed-point type and the resulting | |||
1447 | // type is the type of the converted operand. | |||
1448 | if (RHSTy->isSignedFixedPointType() && LHSTy->isUnsignedFixedPointType()) | |||
1449 | LHSTy = S.Context.getCorrespondingSignedFixedPointType(LHSTy); | |||
1450 | else if (RHSTy->isUnsignedFixedPointType() && LHSTy->isSignedFixedPointType()) | |||
1451 | RHSTy = S.Context.getCorrespondingSignedFixedPointType(RHSTy); | |||
1452 | ||||
1453 | // The result type is the type with the highest rank, whereby a fixed-point | |||
1454 | // conversion rank is always greater than an integer conversion rank; if the | |||
1455 | // type of either of the operands is a saturating fixedpoint type, the result | |||
1456 | // type shall be the saturating fixed-point type corresponding to the type | |||
1457 | // with the highest rank; the resulting value is converted (taking into | |||
1458 | // account rounding and overflow) to the precision of the resulting type. | |||
1459 | // Same ranks between signed and unsigned types are resolved earlier, so both | |||
1460 | // types are either signed or both unsigned at this point. | |||
1461 | unsigned LHSTyRank = GetFixedPointRank(LHSTy); | |||
1462 | unsigned RHSTyRank = GetFixedPointRank(RHSTy); | |||
1463 | ||||
1464 | QualType ResultTy = LHSTyRank > RHSTyRank ? LHSTy : RHSTy; | |||
1465 | ||||
1466 | if (LHSTy->isSaturatedFixedPointType() || RHSTy->isSaturatedFixedPointType()) | |||
1467 | ResultTy = S.Context.getCorrespondingSaturatedType(ResultTy); | |||
1468 | ||||
1469 | return ResultTy; | |||
1470 | } | |||
1471 | ||||
1472 | /// Check that the usual arithmetic conversions can be performed on this pair of | |||
1473 | /// expressions that might be of enumeration type. | |||
1474 | static void checkEnumArithmeticConversions(Sema &S, Expr *LHS, Expr *RHS, | |||
1475 | SourceLocation Loc, | |||
1476 | Sema::ArithConvKind ACK) { | |||
1477 | // C++2a [expr.arith.conv]p1: | |||
1478 | // If one operand is of enumeration type and the other operand is of a | |||
1479 | // different enumeration type or a floating-point type, this behavior is | |||
1480 | // deprecated ([depr.arith.conv.enum]). | |||
1481 | // | |||
1482 | // Warn on this in all language modes. Produce a deprecation warning in C++20. | |||
1483 | // Eventually we will presumably reject these cases (in C++23 onwards?). | |||
1484 | QualType L = LHS->getType(), R = RHS->getType(); | |||
1485 | bool LEnum = L->isUnscopedEnumerationType(), | |||
1486 | REnum = R->isUnscopedEnumerationType(); | |||
1487 | bool IsCompAssign = ACK == Sema::ACK_CompAssign; | |||
1488 | if ((!IsCompAssign && LEnum && R->isFloatingType()) || | |||
1489 | (REnum && L->isFloatingType())) { | |||
1490 | S.Diag(Loc, S.getLangOpts().CPlusPlus20 | |||
1491 | ? diag::warn_arith_conv_enum_float_cxx20 | |||
1492 | : diag::warn_arith_conv_enum_float) | |||
1493 | << LHS->getSourceRange() << RHS->getSourceRange() | |||
1494 | << (int)ACK << LEnum << L << R; | |||
1495 | } else if (!IsCompAssign && LEnum && REnum && | |||
1496 | !S.Context.hasSameUnqualifiedType(L, R)) { | |||
1497 | unsigned DiagID; | |||
1498 | if (!L->castAs<EnumType>()->getDecl()->hasNameForLinkage() || | |||
1499 | !R->castAs<EnumType>()->getDecl()->hasNameForLinkage()) { | |||
1500 | // If either enumeration type is unnamed, it's less likely that the | |||
1501 | // user cares about this, but this situation is still deprecated in | |||
1502 | // C++2a. Use a different warning group. | |||
1503 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1504 | ? diag::warn_arith_conv_mixed_anon_enum_types_cxx20 | |||
1505 | : diag::warn_arith_conv_mixed_anon_enum_types; | |||
1506 | } else if (ACK == Sema::ACK_Conditional) { | |||
1507 | // Conditional expressions are separated out because they have | |||
1508 | // historically had a different warning flag. | |||
1509 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1510 | ? diag::warn_conditional_mixed_enum_types_cxx20 | |||
1511 | : diag::warn_conditional_mixed_enum_types; | |||
1512 | } else if (ACK == Sema::ACK_Comparison) { | |||
1513 | // Comparison expressions are separated out because they have | |||
1514 | // historically had a different warning flag. | |||
1515 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1516 | ? diag::warn_comparison_mixed_enum_types_cxx20 | |||
1517 | : diag::warn_comparison_mixed_enum_types; | |||
1518 | } else { | |||
1519 | DiagID = S.getLangOpts().CPlusPlus20 | |||
1520 | ? diag::warn_arith_conv_mixed_enum_types_cxx20 | |||
1521 | : diag::warn_arith_conv_mixed_enum_types; | |||
1522 | } | |||
1523 | S.Diag(Loc, DiagID) << LHS->getSourceRange() << RHS->getSourceRange() | |||
1524 | << (int)ACK << L << R; | |||
1525 | } | |||
1526 | } | |||
1527 | ||||
1528 | /// UsualArithmeticConversions - Performs various conversions that are common to | |||
1529 | /// binary operators (C99 6.3.1.8). If both operands aren't arithmetic, this | |||
1530 | /// routine returns the first non-arithmetic type found. The client is | |||
1531 | /// responsible for emitting appropriate error diagnostics. | |||
1532 | QualType Sema::UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, | |||
1533 | SourceLocation Loc, | |||
1534 | ArithConvKind ACK) { | |||
1535 | checkEnumArithmeticConversions(*this, LHS.get(), RHS.get(), Loc, ACK); | |||
1536 | ||||
1537 | if (ACK != ACK_CompAssign) { | |||
1538 | LHS = UsualUnaryConversions(LHS.get()); | |||
1539 | if (LHS.isInvalid()) | |||
1540 | return QualType(); | |||
1541 | } | |||
1542 | ||||
1543 | RHS = UsualUnaryConversions(RHS.get()); | |||
1544 | if (RHS.isInvalid()) | |||
1545 | return QualType(); | |||
1546 | ||||
1547 | // For conversion purposes, we ignore any qualifiers. | |||
1548 | // For example, "const float" and "float" are equivalent. | |||
1549 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
1550 | QualType RHSType = 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 (Context.hasSameType(LHSType, RHSType)) | |||
1558 | return Context.getCommonSugaredType(LHSType, RHSType); | |||
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 (Context.isPromotableIntegerType(LHSType)) | |||
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 (Context.hasSameType(LHSType, RHSType)) | |||
1577 | return Context.getCommonSugaredType(LHSType, RHSType); | |||
1578 | ||||
1579 | // At this point, we have two different arithmetic types. | |||
1580 | ||||
1581 | // Diagnose attempts to convert between __ibm128, __float128 and long double | |||
1582 | // where 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 handleComplexConversion(*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()", "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 = | |||
1633 | CreateGenericSelectionExpr(KeyLoc, DefaultLoc, RParenLoc, ControllingExpr, | |||
1634 | llvm::ArrayRef(Types, NumAssocs), ArgExprs); | |||
1635 | delete [] Types; | |||
1636 | return ER; | |||
1637 | } | |||
1638 | ||||
1639 | ExprResult | |||
1640 | Sema::CreateGenericSelectionExpr(SourceLocation KeyLoc, | |||
1641 | SourceLocation DefaultLoc, | |||
1642 | SourceLocation RParenLoc, | |||
1643 | Expr *ControllingExpr, | |||
1644 | ArrayRef<TypeSourceInfo *> Types, | |||
1645 | ArrayRef<Expr *> Exprs) { | |||
1646 | unsigned NumAssocs = Types.size(); | |||
1647 | assert(NumAssocs == Exprs.size())(static_cast <bool> (NumAssocs == Exprs.size()) ? void ( 0) : __assert_fail ("NumAssocs == Exprs.size()", "clang/lib/Sema/SemaExpr.cpp" , 1647, __extension__ __PRETTY_FUNCTION__)); | |||
1648 | ||||
1649 | // Decay and strip qualifiers for the controlling expression type, and handle | |||
1650 | // placeholder type replacement. See committee discussion from WG14 DR423. | |||
1651 | { | |||
1652 | EnterExpressionEvaluationContext Unevaluated( | |||
1653 | *this, Sema::ExpressionEvaluationContext::Unevaluated); | |||
1654 | ExprResult R = DefaultFunctionArrayLvalueConversion(ControllingExpr); | |||
1655 | if (R.isInvalid()) | |||
1656 | return ExprError(); | |||
1657 | ControllingExpr = R.get(); | |||
1658 | } | |||
1659 | ||||
1660 | bool TypeErrorFound = false, | |||
1661 | IsResultDependent = ControllingExpr->isTypeDependent(), | |||
1662 | ContainsUnexpandedParameterPack | |||
1663 | = ControllingExpr->containsUnexpandedParameterPack(); | |||
1664 | ||||
1665 | // The controlling expression is an unevaluated operand, so side effects are | |||
1666 | // likely unintended. | |||
1667 | if (!inTemplateInstantiation() && !IsResultDependent && | |||
1668 | ControllingExpr->HasSideEffects(Context, false)) | |||
1669 | Diag(ControllingExpr->getExprLoc(), | |||
1670 | diag::warn_side_effects_unevaluated_context); | |||
1671 | ||||
1672 | for (unsigned i = 0; i < NumAssocs; ++i) { | |||
1673 | if (Exprs[i]->containsUnexpandedParameterPack()) | |||
1674 | ContainsUnexpandedParameterPack = true; | |||
1675 | ||||
1676 | if (Types[i]) { | |||
1677 | if (Types[i]->getType()->containsUnexpandedParameterPack()) | |||
1678 | ContainsUnexpandedParameterPack = true; | |||
1679 | ||||
1680 | if (Types[i]->getType()->isDependentType()) { | |||
1681 | IsResultDependent = true; | |||
1682 | } else { | |||
1683 | // C11 6.5.1.1p2 "The type name in a generic association shall specify a | |||
1684 | // complete object type other than a variably modified type." | |||
1685 | unsigned D = 0; | |||
1686 | if (Types[i]->getType()->isIncompleteType()) | |||
1687 | D = diag::err_assoc_type_incomplete; | |||
1688 | else if (!Types[i]->getType()->isObjectType()) | |||
1689 | D = diag::err_assoc_type_nonobject; | |||
1690 | else if (Types[i]->getType()->isVariablyModifiedType()) | |||
1691 | D = diag::err_assoc_type_variably_modified; | |||
1692 | else { | |||
1693 | // Because the controlling expression undergoes lvalue conversion, | |||
1694 | // array conversion, and function conversion, an association which is | |||
1695 | // of array type, function type, or is qualified can never be | |||
1696 | // reached. We will warn about this so users are less surprised by | |||
1697 | // the unreachable association. However, we don't have to handle | |||
1698 | // function types; that's not an object type, so it's handled above. | |||
1699 | // | |||
1700 | // The logic is somewhat different for C++ because C++ has different | |||
1701 | // lvalue to rvalue conversion rules than C. [conv.lvalue]p1 says, | |||
1702 | // If T is a non-class type, the type of the prvalue is the cv- | |||
1703 | // unqualified version of T. Otherwise, the type of the prvalue is T. | |||
1704 | // The result of these rules is that all qualified types in an | |||
1705 | // association in C are unreachable, and in C++, only qualified non- | |||
1706 | // class types are unreachable. | |||
1707 | unsigned Reason = 0; | |||
1708 | QualType QT = Types[i]->getType(); | |||
1709 | if (QT->isArrayType()) | |||
1710 | Reason = 1; | |||
1711 | else if (QT.hasQualifiers() && | |||
1712 | (!LangOpts.CPlusPlus || !QT->isRecordType())) | |||
1713 | Reason = 2; | |||
1714 | ||||
1715 | if (Reason) | |||
1716 | Diag(Types[i]->getTypeLoc().getBeginLoc(), | |||
1717 | diag::warn_unreachable_association) | |||
1718 | << QT << (Reason - 1); | |||
1719 | } | |||
1720 | ||||
1721 | if (D != 0) { | |||
1722 | Diag(Types[i]->getTypeLoc().getBeginLoc(), D) | |||
1723 | << Types[i]->getTypeLoc().getSourceRange() | |||
1724 | << Types[i]->getType(); | |||
1725 | TypeErrorFound = true; | |||
1726 | } | |||
1727 | ||||
1728 | // C11 6.5.1.1p2 "No two generic associations in the same generic | |||
1729 | // selection shall specify compatible types." | |||
1730 | for (unsigned j = i+1; j < NumAssocs; ++j) | |||
1731 | if (Types[j] && !Types[j]->getType()->isDependentType() && | |||
1732 | Context.typesAreCompatible(Types[i]->getType(), | |||
1733 | Types[j]->getType())) { | |||
1734 | Diag(Types[j]->getTypeLoc().getBeginLoc(), | |||
1735 | diag::err_assoc_compatible_types) | |||
1736 | << Types[j]->getTypeLoc().getSourceRange() | |||
1737 | << Types[j]->getType() | |||
1738 | << Types[i]->getType(); | |||
1739 | Diag(Types[i]->getTypeLoc().getBeginLoc(), | |||
1740 | diag::note_compat_assoc) | |||
1741 | << Types[i]->getTypeLoc().getSourceRange() | |||
1742 | << Types[i]->getType(); | |||
1743 | TypeErrorFound = true; | |||
1744 | } | |||
1745 | } | |||
1746 | } | |||
1747 | } | |||
1748 | if (TypeErrorFound) | |||
1749 | return ExprError(); | |||
1750 | ||||
1751 | // If we determined that the generic selection is result-dependent, don't | |||
1752 | // try to compute the result expression. | |||
1753 | if (IsResultDependent) | |||
1754 | return GenericSelectionExpr::Create(Context, KeyLoc, ControllingExpr, Types, | |||
1755 | Exprs, DefaultLoc, RParenLoc, | |||
1756 | ContainsUnexpandedParameterPack); | |||
1757 | ||||
1758 | SmallVector<unsigned, 1> CompatIndices; | |||
1759 | unsigned DefaultIndex = -1U; | |||
1760 | // Look at the canonical type of the controlling expression in case it was a | |||
1761 | // deduced type like __auto_type. However, when issuing diagnostics, use the | |||
1762 | // type the user wrote in source rather than the canonical one. | |||
1763 | for (unsigned i = 0; i < NumAssocs; ++i) { | |||
1764 | if (!Types[i]) | |||
1765 | DefaultIndex = i; | |||
1766 | else if (Context.typesAreCompatible( | |||
1767 | ControllingExpr->getType().getCanonicalType(), | |||
1768 | Types[i]->getType())) | |||
1769 | CompatIndices.push_back(i); | |||
1770 | } | |||
1771 | ||||
1772 | // C11 6.5.1.1p2 "The controlling expression of a generic selection shall have | |||
1773 | // type compatible with at most one of the types named in its generic | |||
1774 | // association list." | |||
1775 | if (CompatIndices.size() > 1) { | |||
1776 | // We strip parens here because the controlling expression is typically | |||
1777 | // parenthesized in macro definitions. | |||
1778 | ControllingExpr = ControllingExpr->IgnoreParens(); | |||
1779 | Diag(ControllingExpr->getBeginLoc(), diag::err_generic_sel_multi_match) | |||
1780 | << ControllingExpr->getSourceRange() << ControllingExpr->getType() | |||
1781 | << (unsigned)CompatIndices.size(); | |||
1782 | for (unsigned I : CompatIndices) { | |||
1783 | Diag(Types[I]->getTypeLoc().getBeginLoc(), | |||
1784 | diag::note_compat_assoc) | |||
1785 | << Types[I]->getTypeLoc().getSourceRange() | |||
1786 | << Types[I]->getType(); | |||
1787 | } | |||
1788 | return ExprError(); | |||
1789 | } | |||
1790 | ||||
1791 | // C11 6.5.1.1p2 "If a generic selection has no default generic association, | |||
1792 | // its controlling expression shall have type compatible with exactly one of | |||
1793 | // the types named in its generic association list." | |||
1794 | if (DefaultIndex == -1U && CompatIndices.size() == 0) { | |||
1795 | // We strip parens here because the controlling expression is typically | |||
1796 | // parenthesized in macro definitions. | |||
1797 | ControllingExpr = ControllingExpr->IgnoreParens(); | |||
1798 | Diag(ControllingExpr->getBeginLoc(), diag::err_generic_sel_no_match) | |||
1799 | << ControllingExpr->getSourceRange() << ControllingExpr->getType(); | |||
1800 | return ExprError(); | |||
1801 | } | |||
1802 | ||||
1803 | // C11 6.5.1.1p3 "If a generic selection has a generic association with a | |||
1804 | // type name that is compatible with the type of the controlling expression, | |||
1805 | // then the result expression of the generic selection is the expression | |||
1806 | // in that generic association. Otherwise, the result expression of the | |||
1807 | // generic selection is the expression in the default generic association." | |||
1808 | unsigned ResultIndex = | |||
1809 | CompatIndices.size() ? CompatIndices[0] : DefaultIndex; | |||
1810 | ||||
1811 | return GenericSelectionExpr::Create( | |||
1812 | Context, KeyLoc, ControllingExpr, Types, Exprs, DefaultLoc, RParenLoc, | |||
1813 | ContainsUnexpandedParameterPack, ResultIndex); | |||
1814 | } | |||
1815 | ||||
1816 | /// getUDSuffixLoc - Create a SourceLocation for a ud-suffix, given the | |||
1817 | /// location of the token and the offset of the ud-suffix within it. | |||
1818 | static SourceLocation getUDSuffixLoc(Sema &S, SourceLocation TokLoc, | |||
1819 | unsigned Offset) { | |||
1820 | return Lexer::AdvanceToTokenCharacter(TokLoc, Offset, S.getSourceManager(), | |||
1821 | S.getLangOpts()); | |||
1822 | } | |||
1823 | ||||
1824 | /// BuildCookedLiteralOperatorCall - A user-defined literal was found. Look up | |||
1825 | /// the corresponding cooked (non-raw) literal operator, and build a call to it. | |||
1826 | static ExprResult BuildCookedLiteralOperatorCall(Sema &S, Scope *Scope, | |||
1827 | IdentifierInfo *UDSuffix, | |||
1828 | SourceLocation UDSuffixLoc, | |||
1829 | ArrayRef<Expr*> Args, | |||
1830 | SourceLocation LitEndLoc) { | |||
1831 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 1831, __extension__ __PRETTY_FUNCTION__ )); | |||
1832 | ||||
1833 | QualType ArgTy[2]; | |||
1834 | for (unsigned ArgIdx = 0; ArgIdx != Args.size(); ++ArgIdx) { | |||
1835 | ArgTy[ArgIdx] = Args[ArgIdx]->getType(); | |||
1836 | if (ArgTy[ArgIdx]->isArrayType()) | |||
1837 | ArgTy[ArgIdx] = S.Context.getArrayDecayedType(ArgTy[ArgIdx]); | |||
1838 | } | |||
1839 | ||||
1840 | DeclarationName OpName = | |||
1841 | S.Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
1842 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
1843 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
1844 | ||||
1845 | LookupResult R(S, OpName, UDSuffixLoc, Sema::LookupOrdinaryName); | |||
1846 | if (S.LookupLiteralOperator(Scope, R, llvm::ArrayRef(ArgTy, Args.size()), | |||
1847 | /*AllowRaw*/ false, /*AllowTemplate*/ false, | |||
1848 | /*AllowStringTemplatePack*/ false, | |||
1849 | /*DiagnoseMissing*/ true) == Sema::LOLR_Error) | |||
1850 | return ExprError(); | |||
1851 | ||||
1852 | return S.BuildLiteralOperatorCall(R, OpNameInfo, Args, LitEndLoc); | |||
1853 | } | |||
1854 | ||||
1855 | /// ActOnStringLiteral - The specified tokens were lexed as pasted string | |||
1856 | /// fragments (e.g. "foo" "bar" L"baz"). The result string has to handle string | |||
1857 | /// concatenation ([C99 5.1.1.2, translation phase #6]), so it may come from | |||
1858 | /// multiple tokens. However, the common case is that StringToks points to one | |||
1859 | /// string. | |||
1860 | /// | |||
1861 | ExprResult | |||
1862 | Sema::ActOnStringLiteral(ArrayRef<Token> StringToks, Scope *UDLScope) { | |||
1863 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 1863, __extension__ __PRETTY_FUNCTION__ )); | |||
1864 | ||||
1865 | StringLiteralParser Literal(StringToks, PP); | |||
1866 | if (Literal.hadError) | |||
1867 | return ExprError(); | |||
1868 | ||||
1869 | SmallVector<SourceLocation, 4> StringTokLocs; | |||
1870 | for (const Token &Tok : StringToks) | |||
1871 | StringTokLocs.push_back(Tok.getLocation()); | |||
1872 | ||||
1873 | QualType CharTy = Context.CharTy; | |||
1874 | StringLiteral::StringKind Kind = StringLiteral::Ordinary; | |||
1875 | if (Literal.isWide()) { | |||
1876 | CharTy = Context.getWideCharType(); | |||
1877 | Kind = StringLiteral::Wide; | |||
1878 | } else if (Literal.isUTF8()) { | |||
1879 | if (getLangOpts().Char8) | |||
1880 | CharTy = Context.Char8Ty; | |||
1881 | Kind = StringLiteral::UTF8; | |||
1882 | } else if (Literal.isUTF16()) { | |||
1883 | CharTy = Context.Char16Ty; | |||
1884 | Kind = StringLiteral::UTF16; | |||
1885 | } else if (Literal.isUTF32()) { | |||
1886 | CharTy = Context.Char32Ty; | |||
1887 | Kind = StringLiteral::UTF32; | |||
1888 | } else if (Literal.isPascal()) { | |||
1889 | CharTy = Context.UnsignedCharTy; | |||
1890 | } | |||
1891 | ||||
1892 | // Warn on initializing an array of char from a u8 string literal; this | |||
1893 | // becomes ill-formed in C++2a. | |||
1894 | if (getLangOpts().CPlusPlus && !getLangOpts().CPlusPlus20 && | |||
1895 | !getLangOpts().Char8 && Kind == StringLiteral::UTF8) { | |||
1896 | Diag(StringTokLocs.front(), diag::warn_cxx20_compat_utf8_string); | |||
1897 | ||||
1898 | // Create removals for all 'u8' prefixes in the string literal(s). This | |||
1899 | // ensures C++2a compatibility (but may change the program behavior when | |||
1900 | // built by non-Clang compilers for which the execution character set is | |||
1901 | // not always UTF-8). | |||
1902 | auto RemovalDiag = PDiag(diag::note_cxx20_compat_utf8_string_remove_u8); | |||
1903 | SourceLocation RemovalDiagLoc; | |||
1904 | for (const Token &Tok : StringToks) { | |||
1905 | if (Tok.getKind() == tok::utf8_string_literal) { | |||
1906 | if (RemovalDiagLoc.isInvalid()) | |||
1907 | RemovalDiagLoc = Tok.getLocation(); | |||
1908 | RemovalDiag << FixItHint::CreateRemoval(CharSourceRange::getCharRange( | |||
1909 | Tok.getLocation(), | |||
1910 | Lexer::AdvanceToTokenCharacter(Tok.getLocation(), 2, | |||
1911 | getSourceManager(), getLangOpts()))); | |||
1912 | } | |||
1913 | } | |||
1914 | Diag(RemovalDiagLoc, RemovalDiag); | |||
1915 | } | |||
1916 | ||||
1917 | QualType StrTy = | |||
1918 | Context.getStringLiteralArrayType(CharTy, Literal.GetNumStringChars()); | |||
1919 | ||||
1920 | // Pass &StringTokLocs[0], StringTokLocs.size() to factory! | |||
1921 | StringLiteral *Lit = StringLiteral::Create(Context, Literal.GetString(), | |||
1922 | Kind, Literal.Pascal, StrTy, | |||
1923 | &StringTokLocs[0], | |||
1924 | StringTokLocs.size()); | |||
1925 | if (Literal.getUDSuffix().empty()) | |||
1926 | return Lit; | |||
1927 | ||||
1928 | // We're building a user-defined literal. | |||
1929 | IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
1930 | SourceLocation UDSuffixLoc = | |||
1931 | getUDSuffixLoc(*this, StringTokLocs[Literal.getUDSuffixToken()], | |||
1932 | Literal.getUDSuffixOffset()); | |||
1933 | ||||
1934 | // Make sure we're allowed user-defined literals here. | |||
1935 | if (!UDLScope) | |||
1936 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_string_udl)); | |||
1937 | ||||
1938 | // C++11 [lex.ext]p5: The literal L is treated as a call of the form | |||
1939 | // operator "" X (str, len) | |||
1940 | QualType SizeType = Context.getSizeType(); | |||
1941 | ||||
1942 | DeclarationName OpName = | |||
1943 | Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
1944 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
1945 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
1946 | ||||
1947 | QualType ArgTy[] = { | |||
1948 | Context.getArrayDecayedType(StrTy), SizeType | |||
1949 | }; | |||
1950 | ||||
1951 | LookupResult R(*this, OpName, UDSuffixLoc, LookupOrdinaryName); | |||
1952 | switch (LookupLiteralOperator(UDLScope, R, ArgTy, | |||
1953 | /*AllowRaw*/ false, /*AllowTemplate*/ true, | |||
1954 | /*AllowStringTemplatePack*/ true, | |||
1955 | /*DiagnoseMissing*/ true, Lit)) { | |||
1956 | ||||
1957 | case LOLR_Cooked: { | |||
1958 | llvm::APInt Len(Context.getIntWidth(SizeType), Literal.GetNumStringChars()); | |||
1959 | IntegerLiteral *LenArg = IntegerLiteral::Create(Context, Len, SizeType, | |||
1960 | StringTokLocs[0]); | |||
1961 | Expr *Args[] = { Lit, LenArg }; | |||
1962 | ||||
1963 | return BuildLiteralOperatorCall(R, OpNameInfo, Args, StringTokLocs.back()); | |||
1964 | } | |||
1965 | ||||
1966 | case LOLR_Template: { | |||
1967 | TemplateArgumentListInfo ExplicitArgs; | |||
1968 | TemplateArgument Arg(Lit); | |||
1969 | TemplateArgumentLocInfo ArgInfo(Lit); | |||
1970 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
1971 | return BuildLiteralOperatorCall(R, OpNameInfo, std::nullopt, | |||
1972 | StringTokLocs.back(), &ExplicitArgs); | |||
1973 | } | |||
1974 | ||||
1975 | case LOLR_StringTemplatePack: { | |||
1976 | TemplateArgumentListInfo ExplicitArgs; | |||
1977 | ||||
1978 | unsigned CharBits = Context.getIntWidth(CharTy); | |||
1979 | bool CharIsUnsigned = CharTy->isUnsignedIntegerType(); | |||
1980 | llvm::APSInt Value(CharBits, CharIsUnsigned); | |||
1981 | ||||
1982 | TemplateArgument TypeArg(CharTy); | |||
1983 | TemplateArgumentLocInfo TypeArgInfo(Context.getTrivialTypeSourceInfo(CharTy)); | |||
1984 | ExplicitArgs.addArgument(TemplateArgumentLoc(TypeArg, TypeArgInfo)); | |||
1985 | ||||
1986 | for (unsigned I = 0, N = Lit->getLength(); I != N; ++I) { | |||
1987 | Value = Lit->getCodeUnit(I); | |||
1988 | TemplateArgument Arg(Context, Value, CharTy); | |||
1989 | TemplateArgumentLocInfo ArgInfo; | |||
1990 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
1991 | } | |||
1992 | return BuildLiteralOperatorCall(R, OpNameInfo, std::nullopt, | |||
1993 | StringTokLocs.back(), &ExplicitArgs); | |||
1994 | } | |||
1995 | case LOLR_Raw: | |||
1996 | case LOLR_ErrorNoDiagnostic: | |||
1997 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "clang/lib/Sema/SemaExpr.cpp", 1997); | |||
1998 | case LOLR_Error: | |||
1999 | return ExprError(); | |||
2000 | } | |||
2001 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "clang/lib/Sema/SemaExpr.cpp", 2001); | |||
2002 | } | |||
2003 | ||||
2004 | DeclRefExpr * | |||
2005 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
2006 | SourceLocation Loc, | |||
2007 | const CXXScopeSpec *SS) { | |||
2008 | DeclarationNameInfo NameInfo(D->getDeclName(), Loc); | |||
2009 | return BuildDeclRefExpr(D, Ty, VK, NameInfo, SS); | |||
2010 | } | |||
2011 | ||||
2012 | DeclRefExpr * | |||
2013 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
2014 | const DeclarationNameInfo &NameInfo, | |||
2015 | const CXXScopeSpec *SS, NamedDecl *FoundD, | |||
2016 | SourceLocation TemplateKWLoc, | |||
2017 | const TemplateArgumentListInfo *TemplateArgs) { | |||
2018 | NestedNameSpecifierLoc NNS = | |||
2019 | SS ? SS->getWithLocInContext(Context) : NestedNameSpecifierLoc(); | |||
2020 | return BuildDeclRefExpr(D, Ty, VK, NameInfo, NNS, FoundD, TemplateKWLoc, | |||
2021 | TemplateArgs); | |||
2022 | } | |||
2023 | ||||
2024 | // CUDA/HIP: Check whether a captured reference variable is referencing a | |||
2025 | // host variable in a device or host device lambda. | |||
2026 | static bool isCapturingReferenceToHostVarInCUDADeviceLambda(const Sema &S, | |||
2027 | VarDecl *VD) { | |||
2028 | if (!S.getLangOpts().CUDA || !VD->hasInit()) | |||
2029 | return false; | |||
2030 | assert(VD->getType()->isReferenceType())(static_cast <bool> (VD->getType()->isReferenceType ()) ? void (0) : __assert_fail ("VD->getType()->isReferenceType()" , "clang/lib/Sema/SemaExpr.cpp", 2030, __extension__ __PRETTY_FUNCTION__ )); | |||
2031 | ||||
2032 | // Check whether the reference variable is referencing a host variable. | |||
2033 | auto *DRE = dyn_cast<DeclRefExpr>(VD->getInit()); | |||
2034 | if (!DRE) | |||
2035 | return false; | |||
2036 | auto *Referee = dyn_cast<VarDecl>(DRE->getDecl()); | |||
2037 | if (!Referee || !Referee->hasGlobalStorage() || | |||
2038 | Referee->hasAttr<CUDADeviceAttr>()) | |||
2039 | return false; | |||
2040 | ||||
2041 | // Check whether the current function is a device or host device lambda. | |||
2042 | // Check whether the reference variable is a capture by getDeclContext() | |||
2043 | // since refersToEnclosingVariableOrCapture() is not ready at this point. | |||
2044 | auto *MD = dyn_cast_or_null<CXXMethodDecl>(S.CurContext); | |||
2045 | if (MD && MD->getParent()->isLambda() && | |||
2046 | MD->getOverloadedOperator() == OO_Call && MD->hasAttr<CUDADeviceAttr>() && | |||
2047 | VD->getDeclContext() != MD) | |||
2048 | return true; | |||
2049 | ||||
2050 | return false; | |||
2051 | } | |||
2052 | ||||
2053 | NonOdrUseReason Sema::getNonOdrUseReasonInCurrentContext(ValueDecl *D) { | |||
2054 | // A declaration named in an unevaluated operand never constitutes an odr-use. | |||
2055 | if (isUnevaluatedContext()) | |||
2056 | return NOUR_Unevaluated; | |||
2057 | ||||
2058 | // C++2a [basic.def.odr]p4: | |||
2059 | // A variable x whose name appears as a potentially-evaluated expression e | |||
2060 | // is odr-used by e unless [...] x is a reference that is usable in | |||
2061 | // constant expressions. | |||
2062 | // CUDA/HIP: | |||
2063 | // If a reference variable referencing a host variable is captured in a | |||
2064 | // device or host device lambda, the value of the referee must be copied | |||
2065 | // to the capture and the reference variable must be treated as odr-use | |||
2066 | // since the value of the referee is not known at compile time and must | |||
2067 | // be loaded from the captured. | |||
2068 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | |||
2069 | if (VD->getType()->isReferenceType() && | |||
2070 | !(getLangOpts().OpenMP && isOpenMPCapturedDecl(D)) && | |||
2071 | !isCapturingReferenceToHostVarInCUDADeviceLambda(*this, VD) && | |||
2072 | VD->isUsableInConstantExpressions(Context)) | |||
2073 | return NOUR_Constant; | |||
2074 | } | |||
2075 | ||||
2076 | // All remaining non-variable cases constitute an odr-use. For variables, we | |||
2077 | // need to wait and see how the expression is used. | |||
2078 | return NOUR_None; | |||
2079 | } | |||
2080 | ||||
2081 | /// BuildDeclRefExpr - Build an expression that references a | |||
2082 | /// declaration that does not require a closure capture. | |||
2083 | DeclRefExpr * | |||
2084 | Sema::BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, | |||
2085 | const DeclarationNameInfo &NameInfo, | |||
2086 | NestedNameSpecifierLoc NNS, NamedDecl *FoundD, | |||
2087 | SourceLocation TemplateKWLoc, | |||
2088 | const TemplateArgumentListInfo *TemplateArgs) { | |||
2089 | bool RefersToCapturedVariable = isa<VarDecl, BindingDecl>(D) && | |||
2090 | NeedToCaptureVariable(D, NameInfo.getLoc()); | |||
2091 | ||||
2092 | DeclRefExpr *E = DeclRefExpr::Create( | |||
2093 | Context, NNS, TemplateKWLoc, D, RefersToCapturedVariable, NameInfo, Ty, | |||
2094 | VK, FoundD, TemplateArgs, getNonOdrUseReasonInCurrentContext(D)); | |||
2095 | MarkDeclRefReferenced(E); | |||
2096 | ||||
2097 | // C++ [except.spec]p17: | |||
2098 | // An exception-specification is considered to be needed when: | |||
2099 | // - in an expression, the function is the unique lookup result or | |||
2100 | // the selected member of a set of overloaded functions. | |||
2101 | // | |||
2102 | // We delay doing this until after we've built the function reference and | |||
2103 | // marked it as used so that: | |||
2104 | // a) if the function is defaulted, we get errors from defining it before / | |||
2105 | // instead of errors from computing its exception specification, and | |||
2106 | // b) if the function is a defaulted comparison, we can use the body we | |||
2107 | // build when defining it as input to the exception specification | |||
2108 | // computation rather than computing a new body. | |||
2109 | if (const auto *FPT = Ty->getAs<FunctionProtoType>()) { | |||
2110 | if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) { | |||
2111 | if (const auto *NewFPT = ResolveExceptionSpec(NameInfo.getLoc(), FPT)) | |||
2112 | E->setType(Context.getQualifiedType(NewFPT, Ty.getQualifiers())); | |||
2113 | } | |||
2114 | } | |||
2115 | ||||
2116 | if (getLangOpts().ObjCWeak && isa<VarDecl>(D) && | |||
2117 | Ty.getObjCLifetime() == Qualifiers::OCL_Weak && !isUnevaluatedContext() && | |||
2118 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, E->getBeginLoc())) | |||
2119 | getCurFunction()->recordUseOfWeak(E); | |||
2120 | ||||
2121 | const auto *FD = dyn_cast<FieldDecl>(D); | |||
2122 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) | |||
2123 | FD = IFD->getAnonField(); | |||
2124 | if (FD) { | |||
2125 | UnusedPrivateFields.remove(FD); | |||
2126 | // Just in case we're building an illegal pointer-to-member. | |||
2127 | if (FD->isBitField()) | |||
2128 | E->setObjectKind(OK_BitField); | |||
2129 | } | |||
2130 | ||||
2131 | // C++ [expr.prim]/8: The expression [...] is a bit-field if the identifier | |||
2132 | // designates a bit-field. | |||
2133 | if (const auto *BD = dyn_cast<BindingDecl>(D)) | |||
2134 | if (const auto *BE = BD->getBinding()) | |||
2135 | E->setObjectKind(BE->getObjectKind()); | |||
2136 | ||||
2137 | return E; | |||
2138 | } | |||
2139 | ||||
2140 | /// Decomposes the given name into a DeclarationNameInfo, its location, and | |||
2141 | /// possibly a list of template arguments. | |||
2142 | /// | |||
2143 | /// If this produces template arguments, it is permitted to call | |||
2144 | /// DecomposeTemplateName. | |||
2145 | /// | |||
2146 | /// This actually loses a lot of source location information for | |||
2147 | /// non-standard name kinds; we should consider preserving that in | |||
2148 | /// some way. | |||
2149 | void | |||
2150 | Sema::DecomposeUnqualifiedId(const UnqualifiedId &Id, | |||
2151 | TemplateArgumentListInfo &Buffer, | |||
2152 | DeclarationNameInfo &NameInfo, | |||
2153 | const TemplateArgumentListInfo *&TemplateArgs) { | |||
2154 | if (Id.getKind() == UnqualifiedIdKind::IK_TemplateId) { | |||
2155 | Buffer.setLAngleLoc(Id.TemplateId->LAngleLoc); | |||
2156 | Buffer.setRAngleLoc(Id.TemplateId->RAngleLoc); | |||
2157 | ||||
2158 | ASTTemplateArgsPtr TemplateArgsPtr(Id.TemplateId->getTemplateArgs(), | |||
2159 | Id.TemplateId->NumArgs); | |||
2160 | translateTemplateArguments(TemplateArgsPtr, Buffer); | |||
2161 | ||||
2162 | TemplateName TName = Id.TemplateId->Template.get(); | |||
2163 | SourceLocation TNameLoc = Id.TemplateId->TemplateNameLoc; | |||
2164 | NameInfo = Context.getNameForTemplate(TName, TNameLoc); | |||
2165 | TemplateArgs = &Buffer; | |||
2166 | } else { | |||
2167 | NameInfo = GetNameFromUnqualifiedId(Id); | |||
2168 | TemplateArgs = nullptr; | |||
2169 | } | |||
2170 | } | |||
2171 | ||||
2172 | static void emitEmptyLookupTypoDiagnostic( | |||
2173 | const TypoCorrection &TC, Sema &SemaRef, const CXXScopeSpec &SS, | |||
2174 | DeclarationName Typo, SourceLocation TypoLoc, ArrayRef<Expr *> Args, | |||
2175 | unsigned DiagnosticID, unsigned DiagnosticSuggestID) { | |||
2176 | DeclContext *Ctx = | |||
2177 | SS.isEmpty() ? nullptr : SemaRef.computeDeclContext(SS, false); | |||
2178 | if (!TC) { | |||
2179 | // Emit a special diagnostic for failed member lookups. | |||
2180 | // FIXME: computing the declaration context might fail here (?) | |||
2181 | if (Ctx) | |||
2182 | SemaRef.Diag(TypoLoc, diag::err_no_member) << Typo << Ctx | |||
2183 | << SS.getRange(); | |||
2184 | else | |||
2185 | SemaRef.Diag(TypoLoc, DiagnosticID) << Typo; | |||
2186 | return; | |||
2187 | } | |||
2188 | ||||
2189 | std::string CorrectedStr = TC.getAsString(SemaRef.getLangOpts()); | |||
2190 | bool DroppedSpecifier = | |||
2191 | TC.WillReplaceSpecifier() && Typo.getAsString() == CorrectedStr; | |||
2192 | unsigned NoteID = TC.getCorrectionDeclAs<ImplicitParamDecl>() | |||
2193 | ? diag::note_implicit_param_decl | |||
2194 | : diag::note_previous_decl; | |||
2195 | if (!Ctx) | |||
2196 | SemaRef.diagnoseTypo(TC, SemaRef.PDiag(DiagnosticSuggestID) << Typo, | |||
2197 | SemaRef.PDiag(NoteID)); | |||
2198 | else | |||
2199 | SemaRef.diagnoseTypo(TC, SemaRef.PDiag(diag::err_no_member_suggest) | |||
2200 | << Typo << Ctx << DroppedSpecifier | |||
2201 | << SS.getRange(), | |||
2202 | SemaRef.PDiag(NoteID)); | |||
2203 | } | |||
2204 | ||||
2205 | /// Diagnose a lookup that found results in an enclosing class during error | |||
2206 | /// recovery. This usually indicates that the results were found in a dependent | |||
2207 | /// base class that could not be searched as part of a template definition. | |||
2208 | /// Always issues a diagnostic (though this may be only a warning in MS | |||
2209 | /// compatibility mode). | |||
2210 | /// | |||
2211 | /// Return \c true if the error is unrecoverable, or \c false if the caller | |||
2212 | /// should attempt to recover using these lookup results. | |||
2213 | bool Sema::DiagnoseDependentMemberLookup(const LookupResult &R) { | |||
2214 | // During a default argument instantiation the CurContext points | |||
2215 | // to a CXXMethodDecl; but we can't apply a this-> fixit inside a | |||
2216 | // function parameter list, hence add an explicit check. | |||
2217 | bool isDefaultArgument = | |||
2218 | !CodeSynthesisContexts.empty() && | |||
2219 | CodeSynthesisContexts.back().Kind == | |||
2220 | CodeSynthesisContext::DefaultFunctionArgumentInstantiation; | |||
2221 | const auto *CurMethod = dyn_cast<CXXMethodDecl>(CurContext); | |||
2222 | bool isInstance = CurMethod && CurMethod->isInstance() && | |||
2223 | R.getNamingClass() == CurMethod->getParent() && | |||
2224 | !isDefaultArgument; | |||
2225 | ||||
2226 | // There are two ways we can find a class-scope declaration during template | |||
2227 | // instantiation that we did not find in the template definition: if it is a | |||
2228 | // member of a dependent base class, or if it is declared after the point of | |||
2229 | // use in the same class. Distinguish these by comparing the class in which | |||
2230 | // the member was found to the naming class of the lookup. | |||
2231 | unsigned DiagID = diag::err_found_in_dependent_base; | |||
2232 | unsigned NoteID = diag::note_member_declared_at; | |||
2233 | if (R.getRepresentativeDecl()->getDeclContext()->Equals(R.getNamingClass())) { | |||
2234 | DiagID = getLangOpts().MSVCCompat ? diag::ext_found_later_in_class | |||
2235 | : diag::err_found_later_in_class; | |||
2236 | } else if (getLangOpts().MSVCCompat) { | |||
2237 | DiagID = diag::ext_found_in_dependent_base; | |||
2238 | NoteID = diag::note_dependent_member_use; | |||
2239 | } | |||
2240 | ||||
2241 | if (isInstance) { | |||
2242 | // Give a code modification hint to insert 'this->'. | |||
2243 | Diag(R.getNameLoc(), DiagID) | |||
2244 | << R.getLookupName() | |||
2245 | << FixItHint::CreateInsertion(R.getNameLoc(), "this->"); | |||
2246 | CheckCXXThisCapture(R.getNameLoc()); | |||
2247 | } else { | |||
2248 | // FIXME: Add a FixItHint to insert 'Base::' or 'Derived::' (assuming | |||
2249 | // they're not shadowed). | |||
2250 | Diag(R.getNameLoc(), DiagID) << R.getLookupName(); | |||
2251 | } | |||
2252 | ||||
2253 | for (const NamedDecl *D : R) | |||
2254 | Diag(D->getLocation(), NoteID); | |||
2255 | ||||
2256 | // Return true if we are inside a default argument instantiation | |||
2257 | // and the found name refers to an instance member function, otherwise | |||
2258 | // the caller will try to create an implicit member call and this is wrong | |||
2259 | // for default arguments. | |||
2260 | // | |||
2261 | // FIXME: Is this special case necessary? We could allow the caller to | |||
2262 | // diagnose this. | |||
2263 | if (isDefaultArgument && ((*R.begin())->isCXXInstanceMember())) { | |||
2264 | Diag(R.getNameLoc(), diag::err_member_call_without_object); | |||
2265 | return true; | |||
2266 | } | |||
2267 | ||||
2268 | // Tell the callee to try to recover. | |||
2269 | return false; | |||
2270 | } | |||
2271 | ||||
2272 | /// Diagnose an empty lookup. | |||
2273 | /// | |||
2274 | /// \return false if new lookup candidates were found | |||
2275 | bool Sema::DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, | |||
2276 | CorrectionCandidateCallback &CCC, | |||
2277 | TemplateArgumentListInfo *ExplicitTemplateArgs, | |||
2278 | ArrayRef<Expr *> Args, TypoExpr **Out) { | |||
2279 | DeclarationName Name = R.getLookupName(); | |||
2280 | ||||
2281 | unsigned diagnostic = diag::err_undeclared_var_use; | |||
2282 | unsigned diagnostic_suggest = diag::err_undeclared_var_use_suggest; | |||
2283 | if (Name.getNameKind() == DeclarationName::CXXOperatorName || | |||
2284 | Name.getNameKind() == DeclarationName::CXXLiteralOperatorName || | |||
2285 | Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { | |||
2286 | diagnostic = diag::err_undeclared_use; | |||
2287 | diagnostic_suggest = diag::err_undeclared_use_suggest; | |||
2288 | } | |||
2289 | ||||
2290 | // If the original lookup was an unqualified lookup, fake an | |||
2291 | // unqualified lookup. This is useful when (for example) the | |||
2292 | // original lookup would not have found something because it was a | |||
2293 | // dependent name. | |||
2294 | DeclContext *DC = SS.isEmpty() ? CurContext : nullptr; | |||
2295 | while (DC) { | |||
2296 | if (isa<CXXRecordDecl>(DC)) { | |||
2297 | LookupQualifiedName(R, DC); | |||
2298 | ||||
2299 | if (!R.empty()) { | |||
2300 | // Don't give errors about ambiguities in this lookup. | |||
2301 | R.suppressDiagnostics(); | |||
2302 | ||||
2303 | // If there's a best viable function among the results, only mention | |||
2304 | // that one in the notes. | |||
2305 | OverloadCandidateSet Candidates(R.getNameLoc(), | |||
2306 | OverloadCandidateSet::CSK_Normal); | |||
2307 | AddOverloadedCallCandidates(R, ExplicitTemplateArgs, Args, Candidates); | |||
2308 | OverloadCandidateSet::iterator Best; | |||
2309 | if (Candidates.BestViableFunction(*this, R.getNameLoc(), Best) == | |||
2310 | OR_Success) { | |||
2311 | R.clear(); | |||
2312 | R.addDecl(Best->FoundDecl.getDecl(), Best->FoundDecl.getAccess()); | |||
2313 | R.resolveKind(); | |||
2314 | } | |||
2315 | ||||
2316 | return DiagnoseDependentMemberLookup(R); | |||
2317 | } | |||
2318 | ||||
2319 | R.clear(); | |||
2320 | } | |||
2321 | ||||
2322 | DC = DC->getLookupParent(); | |||
2323 | } | |||
2324 | ||||
2325 | // We didn't find anything, so try to correct for a typo. | |||
2326 | TypoCorrection Corrected; | |||
2327 | if (S && Out) { | |||
2328 | SourceLocation TypoLoc = R.getNameLoc(); | |||
2329 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 2330, __extension__ __PRETTY_FUNCTION__ )) | |||
2330 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 2330, __extension__ __PRETTY_FUNCTION__ )); | |||
2331 | *Out = CorrectTypoDelayed( | |||
2332 | R.getLookupNameInfo(), R.getLookupKind(), S, &SS, CCC, | |||
2333 | [=](const TypoCorrection &TC) { | |||
2334 | emitEmptyLookupTypoDiagnostic(TC, *this, SS, Name, TypoLoc, Args, | |||
2335 | diagnostic, diagnostic_suggest); | |||
2336 | }, | |||
2337 | nullptr, CTK_ErrorRecovery); | |||
2338 | if (*Out) | |||
2339 | return true; | |||
2340 | } else if (S && | |||
2341 | (Corrected = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), | |||
2342 | S, &SS, CCC, CTK_ErrorRecovery))) { | |||
2343 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | |||
2344 | bool DroppedSpecifier = | |||
2345 | Corrected.WillReplaceSpecifier() && Name.getAsString() == CorrectedStr; | |||
2346 | R.setLookupName(Corrected.getCorrection()); | |||
2347 | ||||
2348 | bool AcceptableWithRecovery = false; | |||
2349 | bool AcceptableWithoutRecovery = false; | |||
2350 | NamedDecl *ND = Corrected.getFoundDecl(); | |||
2351 | if (ND) { | |||
2352 | if (Corrected.isOverloaded()) { | |||
2353 | OverloadCandidateSet OCS(R.getNameLoc(), | |||
2354 | OverloadCandidateSet::CSK_Normal); | |||
2355 | OverloadCandidateSet::iterator Best; | |||
2356 | for (NamedDecl *CD : Corrected) { | |||
2357 | if (FunctionTemplateDecl *FTD = | |||
2358 | dyn_cast<FunctionTemplateDecl>(CD)) | |||
2359 | AddTemplateOverloadCandidate( | |||
2360 | FTD, DeclAccessPair::make(FTD, AS_none), ExplicitTemplateArgs, | |||
2361 | Args, OCS); | |||
2362 | else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(CD)) | |||
2363 | if (!ExplicitTemplateArgs || ExplicitTemplateArgs->size() == 0) | |||
2364 | AddOverloadCandidate(FD, DeclAccessPair::make(FD, AS_none), | |||
2365 | Args, OCS); | |||
2366 | } | |||
2367 | switch (OCS.BestViableFunction(*this, R.getNameLoc(), Best)) { | |||
2368 | case OR_Success: | |||
2369 | ND = Best->FoundDecl; | |||
2370 | Corrected.setCorrectionDecl(ND); | |||
2371 | break; | |||
2372 | default: | |||
2373 | // FIXME: Arbitrarily pick the first declaration for the note. | |||
2374 | Corrected.setCorrectionDecl(ND); | |||
2375 | break; | |||
2376 | } | |||
2377 | } | |||
2378 | R.addDecl(ND); | |||
2379 | if (getLangOpts().CPlusPlus && ND->isCXXClassMember()) { | |||
2380 | CXXRecordDecl *Record = nullptr; | |||
2381 | if (Corrected.getCorrectionSpecifier()) { | |||
2382 | const Type *Ty = Corrected.getCorrectionSpecifier()->getAsType(); | |||
2383 | Record = Ty->getAsCXXRecordDecl(); | |||
2384 | } | |||
2385 | if (!Record) | |||
2386 | Record = cast<CXXRecordDecl>( | |||
2387 | ND->getDeclContext()->getRedeclContext()); | |||
2388 | R.setNamingClass(Record); | |||
2389 | } | |||
2390 | ||||
2391 | auto *UnderlyingND = ND->getUnderlyingDecl(); | |||
2392 | AcceptableWithRecovery = isa<ValueDecl>(UnderlyingND) || | |||
2393 | isa<FunctionTemplateDecl>(UnderlyingND); | |||
2394 | // FIXME: If we ended up with a typo for a type name or | |||
2395 | // Objective-C class name, we're in trouble because the parser | |||
2396 | // is in the wrong place to recover. Suggest the typo | |||
2397 | // correction, but don't make it a fix-it since we're not going | |||
2398 | // to recover well anyway. | |||
2399 | AcceptableWithoutRecovery = isa<TypeDecl>(UnderlyingND) || | |||
2400 | getAsTypeTemplateDecl(UnderlyingND) || | |||
2401 | isa<ObjCInterfaceDecl>(UnderlyingND); | |||
2402 | } else { | |||
2403 | // FIXME: We found a keyword. Suggest it, but don't provide a fix-it | |||
2404 | // because we aren't able to recover. | |||
2405 | AcceptableWithoutRecovery = true; | |||
2406 | } | |||
2407 | ||||
2408 | if (AcceptableWithRecovery || AcceptableWithoutRecovery) { | |||
2409 | unsigned NoteID = Corrected.getCorrectionDeclAs<ImplicitParamDecl>() | |||
2410 | ? diag::note_implicit_param_decl | |||
2411 | : diag::note_previous_decl; | |||
2412 | if (SS.isEmpty()) | |||
2413 | diagnoseTypo(Corrected, PDiag(diagnostic_suggest) << Name, | |||
2414 | PDiag(NoteID), AcceptableWithRecovery); | |||
2415 | else | |||
2416 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) | |||
2417 | << Name << computeDeclContext(SS, false) | |||
2418 | << DroppedSpecifier << SS.getRange(), | |||
2419 | PDiag(NoteID), AcceptableWithRecovery); | |||
2420 | ||||
2421 | // Tell the callee whether to try to recover. | |||
2422 | return !AcceptableWithRecovery; | |||
2423 | } | |||
2424 | } | |||
2425 | R.clear(); | |||
2426 | ||||
2427 | // Emit a special diagnostic for failed member lookups. | |||
2428 | // FIXME: computing the declaration context might fail here (?) | |||
2429 | if (!SS.isEmpty()) { | |||
2430 | Diag(R.getNameLoc(), diag::err_no_member) | |||
2431 | << Name << computeDeclContext(SS, false) | |||
2432 | << SS.getRange(); | |||
2433 | return true; | |||
2434 | } | |||
2435 | ||||
2436 | // Give up, we can't recover. | |||
2437 | Diag(R.getNameLoc(), diagnostic) << Name; | |||
2438 | return true; | |||
2439 | } | |||
2440 | ||||
2441 | /// In Microsoft mode, if we are inside a template class whose parent class has | |||
2442 | /// dependent base classes, and we can't resolve an unqualified identifier, then | |||
2443 | /// assume the identifier is a member of a dependent base class. We can only | |||
2444 | /// recover successfully in static methods, instance methods, and other contexts | |||
2445 | /// where 'this' is available. This doesn't precisely match MSVC's | |||
2446 | /// instantiation model, but it's close enough. | |||
2447 | static Expr * | |||
2448 | recoverFromMSUnqualifiedLookup(Sema &S, ASTContext &Context, | |||
2449 | DeclarationNameInfo &NameInfo, | |||
2450 | SourceLocation TemplateKWLoc, | |||
2451 | const TemplateArgumentListInfo *TemplateArgs) { | |||
2452 | // Only try to recover from lookup into dependent bases in static methods or | |||
2453 | // contexts where 'this' is available. | |||
2454 | QualType ThisType = S.getCurrentThisType(); | |||
2455 | const CXXRecordDecl *RD = nullptr; | |||
2456 | if (!ThisType.isNull()) | |||
2457 | RD = ThisType->getPointeeType()->getAsCXXRecordDecl(); | |||
2458 | else if (auto *MD = dyn_cast<CXXMethodDecl>(S.CurContext)) | |||
2459 | RD = MD->getParent(); | |||
2460 | if (!RD || !RD->hasAnyDependentBases()) | |||
2461 | return nullptr; | |||
2462 | ||||
2463 | // Diagnose this as unqualified lookup into a dependent base class. If 'this' | |||
2464 | // is available, suggest inserting 'this->' as a fixit. | |||
2465 | SourceLocation Loc = NameInfo.getLoc(); | |||
2466 | auto DB = S.Diag(Loc, diag::ext_undeclared_unqual_id_with_dependent_base); | |||
2467 | DB << NameInfo.getName() << RD; | |||
2468 | ||||
2469 | if (!ThisType.isNull()) { | |||
2470 | DB << FixItHint::CreateInsertion(Loc, "this->"); | |||
2471 | return CXXDependentScopeMemberExpr::Create( | |||
2472 | Context, /*This=*/nullptr, ThisType, /*IsArrow=*/true, | |||
2473 | /*Op=*/SourceLocation(), NestedNameSpecifierLoc(), TemplateKWLoc, | |||
2474 | /*FirstQualifierFoundInScope=*/nullptr, NameInfo, TemplateArgs); | |||
2475 | } | |||
2476 | ||||
2477 | // Synthesize a fake NNS that points to the derived class. This will | |||
2478 | // perform name lookup during template instantiation. | |||
2479 | CXXScopeSpec SS; | |||
2480 | auto *NNS = | |||
2481 | NestedNameSpecifier::Create(Context, nullptr, true, RD->getTypeForDecl()); | |||
2482 | SS.MakeTrivial(Context, NNS, SourceRange(Loc, Loc)); | |||
2483 | return DependentScopeDeclRefExpr::Create( | |||
2484 | Context, SS.getWithLocInContext(Context), TemplateKWLoc, NameInfo, | |||
2485 | TemplateArgs); | |||
2486 | } | |||
2487 | ||||
2488 | ExprResult | |||
2489 | Sema::ActOnIdExpression(Scope *S, CXXScopeSpec &SS, | |||
2490 | SourceLocation TemplateKWLoc, UnqualifiedId &Id, | |||
2491 | bool HasTrailingLParen, bool IsAddressOfOperand, | |||
2492 | CorrectionCandidateCallback *CCC, | |||
2493 | bool IsInlineAsmIdentifier, Token *KeywordReplacement) { | |||
2494 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 2495, __extension__ __PRETTY_FUNCTION__ )) | |||
2495 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 2495, __extension__ __PRETTY_FUNCTION__ )); | |||
2496 | if (SS.isInvalid()) | |||
2497 | return ExprError(); | |||
2498 | ||||
2499 | TemplateArgumentListInfo TemplateArgsBuffer; | |||
2500 | ||||
2501 | // Decompose the UnqualifiedId into the following data. | |||
2502 | DeclarationNameInfo NameInfo; | |||
2503 | const TemplateArgumentListInfo *TemplateArgs; | |||
2504 | DecomposeUnqualifiedId(Id, TemplateArgsBuffer, NameInfo, TemplateArgs); | |||
2505 | ||||
2506 | DeclarationName Name = NameInfo.getName(); | |||
2507 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | |||
2508 | SourceLocation NameLoc = NameInfo.getLoc(); | |||
2509 | ||||
2510 | if (II && II->isEditorPlaceholder()) { | |||
2511 | // FIXME: When typed placeholders are supported we can create a typed | |||
2512 | // placeholder expression node. | |||
2513 | return ExprError(); | |||
2514 | } | |||
2515 | ||||
2516 | // C++ [temp.dep.expr]p3: | |||
2517 | // An id-expression is type-dependent if it contains: | |||
2518 | // -- an identifier that was declared with a dependent type, | |||
2519 | // (note: handled after lookup) | |||
2520 | // -- a template-id that is dependent, | |||
2521 | // (note: handled in BuildTemplateIdExpr) | |||
2522 | // -- a conversion-function-id that specifies a dependent type, | |||
2523 | // -- a nested-name-specifier that contains a class-name that | |||
2524 | // names a dependent type. | |||
2525 | // Determine whether this is a member of an unknown specialization; | |||
2526 | // we need to handle these differently. | |||
2527 | bool DependentID = false; | |||
2528 | if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName && | |||
2529 | Name.getCXXNameType()->isDependentType()) { | |||
2530 | DependentID = true; | |||
2531 | } else if (SS.isSet()) { | |||
2532 | if (DeclContext *DC = computeDeclContext(SS, false)) { | |||
2533 | if (RequireCompleteDeclContext(SS, DC)) | |||
2534 | return ExprError(); | |||
2535 | } else { | |||
2536 | DependentID = true; | |||
2537 | } | |||
2538 | } | |||
2539 | ||||
2540 | if (DependentID) | |||
2541 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2542 | IsAddressOfOperand, TemplateArgs); | |||
2543 | ||||
2544 | // Perform the required lookup. | |||
2545 | LookupResult R(*this, NameInfo, | |||
2546 | (Id.getKind() == UnqualifiedIdKind::IK_ImplicitSelfParam) | |||
2547 | ? LookupObjCImplicitSelfParam | |||
2548 | : LookupOrdinaryName); | |||
2549 | if (TemplateKWLoc.isValid() || TemplateArgs) { | |||
2550 | // Lookup the template name again to correctly establish the context in | |||
2551 | // which it was found. This is really unfortunate as we already did the | |||
2552 | // lookup to determine that it was a template name in the first place. If | |||
2553 | // this becomes a performance hit, we can work harder to preserve those | |||
2554 | // results until we get here but it's likely not worth it. | |||
2555 | bool MemberOfUnknownSpecialization; | |||
2556 | AssumedTemplateKind AssumedTemplate; | |||
2557 | if (LookupTemplateName(R, S, SS, QualType(), /*EnteringContext=*/false, | |||
2558 | MemberOfUnknownSpecialization, TemplateKWLoc, | |||
2559 | &AssumedTemplate)) | |||
2560 | return ExprError(); | |||
2561 | ||||
2562 | if (MemberOfUnknownSpecialization || | |||
2563 | (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation)) | |||
2564 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2565 | IsAddressOfOperand, TemplateArgs); | |||
2566 | } else { | |||
2567 | bool IvarLookupFollowUp = II && !SS.isSet() && getCurMethodDecl(); | |||
2568 | LookupParsedName(R, S, &SS, !IvarLookupFollowUp); | |||
2569 | ||||
2570 | // If the result might be in a dependent base class, this is a dependent | |||
2571 | // id-expression. | |||
2572 | if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation) | |||
2573 | return ActOnDependentIdExpression(SS, TemplateKWLoc, NameInfo, | |||
2574 | IsAddressOfOperand, TemplateArgs); | |||
2575 | ||||
2576 | // If this reference is in an Objective-C method, then we need to do | |||
2577 | // some special Objective-C lookup, too. | |||
2578 | if (IvarLookupFollowUp) { | |||
2579 | ExprResult E(LookupInObjCMethod(R, S, II, true)); | |||
2580 | if (E.isInvalid()) | |||
2581 | return ExprError(); | |||
2582 | ||||
2583 | if (Expr *Ex = E.getAs<Expr>()) | |||
2584 | return Ex; | |||
2585 | } | |||
2586 | } | |||
2587 | ||||
2588 | if (R.isAmbiguous()) | |||
2589 | return ExprError(); | |||
2590 | ||||
2591 | // This could be an implicitly declared function reference if the language | |||
2592 | // mode allows it as a feature. | |||
2593 | if (R.empty() && HasTrailingLParen && II && | |||
2594 | getLangOpts().implicitFunctionsAllowed()) { | |||
2595 | NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *II, S); | |||
2596 | if (D) R.addDecl(D); | |||
2597 | } | |||
2598 | ||||
2599 | // Determine whether this name might be a candidate for | |||
2600 | // argument-dependent lookup. | |||
2601 | bool ADL = UseArgumentDependentLookup(SS, R, HasTrailingLParen); | |||
2602 | ||||
2603 | if (R.empty() && !ADL) { | |||
2604 | if (SS.isEmpty() && getLangOpts().MSVCCompat) { | |||
2605 | if (Expr *E = recoverFromMSUnqualifiedLookup(*this, Context, NameInfo, | |||
2606 | TemplateKWLoc, TemplateArgs)) | |||
2607 | return E; | |||
2608 | } | |||
2609 | ||||
2610 | // Don't diagnose an empty lookup for inline assembly. | |||
2611 | if (IsInlineAsmIdentifier) | |||
2612 | return ExprError(); | |||
2613 | ||||
2614 | // If this name wasn't predeclared and if this is not a function | |||
2615 | // call, diagnose the problem. | |||
2616 | TypoExpr *TE = nullptr; | |||
2617 | DefaultFilterCCC DefaultValidator(II, SS.isValid() ? SS.getScopeRep() | |||
2618 | : nullptr); | |||
2619 | DefaultValidator.IsAddressOfOperand = IsAddressOfOperand; | |||
2620 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 2621, __extension__ __PRETTY_FUNCTION__ )) | |||
2621 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 2621, __extension__ __PRETTY_FUNCTION__ )); | |||
2622 | if (CCC) { | |||
2623 | // Make sure the callback knows what the typo being diagnosed is. | |||
2624 | CCC->setTypoName(II); | |||
2625 | if (SS.isValid()) | |||
2626 | CCC->setTypoNNS(SS.getScopeRep()); | |||
2627 | } | |||
2628 | // FIXME: DiagnoseEmptyLookup produces bad diagnostics if we're looking for | |||
2629 | // a template name, but we happen to have always already looked up the name | |||
2630 | // before we get here if it must be a template name. | |||
2631 | if (DiagnoseEmptyLookup(S, SS, R, CCC ? *CCC : DefaultValidator, nullptr, | |||
2632 | std::nullopt, &TE)) { | |||
2633 | if (TE && KeywordReplacement) { | |||
2634 | auto &State = getTypoExprState(TE); | |||
2635 | auto BestTC = State.Consumer->getNextCorrection(); | |||
2636 | if (BestTC.isKeyword()) { | |||
2637 | auto *II = BestTC.getCorrectionAsIdentifierInfo(); | |||
2638 | if (State.DiagHandler) | |||
2639 | State.DiagHandler(BestTC); | |||
2640 | KeywordReplacement->startToken(); | |||
2641 | KeywordReplacement->setKind(II->getTokenID()); | |||
2642 | KeywordReplacement->setIdentifierInfo(II); | |||
2643 | KeywordReplacement->setLocation(BestTC.getCorrectionRange().getBegin()); | |||
2644 | // Clean up the state associated with the TypoExpr, since it has | |||
2645 | // now been diagnosed (without a call to CorrectDelayedTyposInExpr). | |||
2646 | clearDelayedTypo(TE); | |||
2647 | // Signal that a correction to a keyword was performed by returning a | |||
2648 | // valid-but-null ExprResult. | |||
2649 | return (Expr*)nullptr; | |||
2650 | } | |||
2651 | State.Consumer->resetCorrectionStream(); | |||
2652 | } | |||
2653 | return TE ? TE : ExprError(); | |||
2654 | } | |||
2655 | ||||
2656 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 2657, __extension__ __PRETTY_FUNCTION__ )) | |||
2657 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 2657, __extension__ __PRETTY_FUNCTION__ )); | |||
2658 | ||||
2659 | // If we found an Objective-C instance variable, let | |||
2660 | // LookupInObjCMethod build the appropriate expression to | |||
2661 | // reference the ivar. | |||
2662 | if (ObjCIvarDecl *Ivar = R.getAsSingle<ObjCIvarDecl>()) { | |||
2663 | R.clear(); | |||
2664 | ExprResult E(LookupInObjCMethod(R, S, Ivar->getIdentifier())); | |||
2665 | // In a hopelessly buggy code, Objective-C instance variable | |||
2666 | // lookup fails and no expression will be built to reference it. | |||
2667 | if (!E.isInvalid() && !E.get()) | |||
2668 | return ExprError(); | |||
2669 | return E; | |||
2670 | } | |||
2671 | } | |||
2672 | ||||
2673 | // This is guaranteed from this point on. | |||
2674 | assert(!R.empty() || ADL)(static_cast <bool> (!R.empty() || ADL) ? void (0) : __assert_fail ("!R.empty() || ADL", "clang/lib/Sema/SemaExpr.cpp", 2674, __extension__ __PRETTY_FUNCTION__)); | |||
2675 | ||||
2676 | // Check whether this might be a C++ implicit instance member access. | |||
2677 | // C++ [class.mfct.non-static]p3: | |||
2678 | // When an id-expression that is not part of a class member access | |||
2679 | // syntax and not used to form a pointer to member is used in the | |||
2680 | // body of a non-static member function of class X, if name lookup | |||
2681 | // resolves the name in the id-expression to a non-static non-type | |||
2682 | // member of some class C, the id-expression is transformed into a | |||
2683 | // class member access expression using (*this) as the | |||
2684 | // postfix-expression to the left of the . operator. | |||
2685 | // | |||
2686 | // But we don't actually need to do this for '&' operands if R | |||
2687 | // resolved to a function or overloaded function set, because the | |||
2688 | // expression is ill-formed if it actually works out to be a | |||
2689 | // non-static member function: | |||
2690 | // | |||
2691 | // C++ [expr.ref]p4: | |||
2692 | // Otherwise, if E1.E2 refers to a non-static member function. . . | |||
2693 | // [t]he expression can be used only as the left-hand operand of a | |||
2694 | // member function call. | |||
2695 | // | |||
2696 | // There are other safeguards against such uses, but it's important | |||
2697 | // to get this right here so that we don't end up making a | |||
2698 | // spuriously dependent expression if we're inside a dependent | |||
2699 | // instance method. | |||
2700 | if (!R.empty() && (*R.begin())->isCXXClassMember()) { | |||
2701 | bool MightBeImplicitMember; | |||
2702 | if (!IsAddressOfOperand) | |||
2703 | MightBeImplicitMember = true; | |||
2704 | else if (!SS.isEmpty()) | |||
2705 | MightBeImplicitMember = false; | |||
2706 | else if (R.isOverloadedResult()) | |||
2707 | MightBeImplicitMember = false; | |||
2708 | else if (R.isUnresolvableResult()) | |||
2709 | MightBeImplicitMember = true; | |||
2710 | else | |||
2711 | MightBeImplicitMember = isa<FieldDecl>(R.getFoundDecl()) || | |||
2712 | isa<IndirectFieldDecl>(R.getFoundDecl()) || | |||
2713 | isa<MSPropertyDecl>(R.getFoundDecl()); | |||
2714 | ||||
2715 | if (MightBeImplicitMember) | |||
2716 | return BuildPossibleImplicitMemberExpr(SS, TemplateKWLoc, | |||
2717 | R, TemplateArgs, S); | |||
2718 | } | |||
2719 | ||||
2720 | if (TemplateArgs || TemplateKWLoc.isValid()) { | |||
2721 | ||||
2722 | // In C++1y, if this is a variable template id, then check it | |||
2723 | // in BuildTemplateIdExpr(). | |||
2724 | // The single lookup result must be a variable template declaration. | |||
2725 | if (Id.getKind() == UnqualifiedIdKind::IK_TemplateId && Id.TemplateId && | |||
2726 | Id.TemplateId->Kind == TNK_Var_template) { | |||
2727 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 2728, __extension__ __PRETTY_FUNCTION__ )) | |||
2728 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 2728, __extension__ __PRETTY_FUNCTION__ )); | |||
2729 | } | |||
2730 | ||||
2731 | return BuildTemplateIdExpr(SS, TemplateKWLoc, R, ADL, TemplateArgs); | |||
2732 | } | |||
2733 | ||||
2734 | return BuildDeclarationNameExpr(SS, R, ADL); | |||
2735 | } | |||
2736 | ||||
2737 | /// BuildQualifiedDeclarationNameExpr - Build a C++ qualified | |||
2738 | /// declaration name, generally during template instantiation. | |||
2739 | /// There's a large number of things which don't need to be done along | |||
2740 | /// this path. | |||
2741 | ExprResult Sema::BuildQualifiedDeclarationNameExpr( | |||
2742 | CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, | |||
2743 | bool IsAddressOfOperand, const Scope *S, TypeSourceInfo **RecoveryTSI) { | |||
2744 | if (NameInfo.getName().isDependentName()) | |||
2745 | return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(), | |||
2746 | NameInfo, /*TemplateArgs=*/nullptr); | |||
2747 | ||||
2748 | DeclContext *DC = computeDeclContext(SS, false); | |||
2749 | if (!DC) | |||
2750 | return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(), | |||
2751 | NameInfo, /*TemplateArgs=*/nullptr); | |||
2752 | ||||
2753 | if (RequireCompleteDeclContext(SS, DC)) | |||
2754 | return ExprError(); | |||
2755 | ||||
2756 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | |||
2757 | LookupQualifiedName(R, DC); | |||
2758 | ||||
2759 | if (R.isAmbiguous()) | |||
2760 | return ExprError(); | |||
2761 | ||||
2762 | if (R.getResultKind() == LookupResult::NotFoundInCurrentInstantiation) | |||
2763 | return BuildDependentDeclRefExpr(SS, /*TemplateKWLoc=*/SourceLocation(), | |||
2764 | NameInfo, /*TemplateArgs=*/nullptr); | |||
2765 | ||||
2766 | if (R.empty()) { | |||
2767 | // Don't diagnose problems with invalid record decl, the secondary no_member | |||
2768 | // diagnostic during template instantiation is likely bogus, e.g. if a class | |||
2769 | // is invalid because it's derived from an invalid base class, then missing | |||
2770 | // members were likely supposed to be inherited. | |||
2771 | if (const auto *CD = dyn_cast<CXXRecordDecl>(DC)) | |||
2772 | if (CD->isInvalidDecl()) | |||
2773 | return ExprError(); | |||
2774 | Diag(NameInfo.getLoc(), diag::err_no_member) | |||
2775 | << NameInfo.getName() << DC << SS.getRange(); | |||
2776 | return ExprError(); | |||
2777 | } | |||
2778 | ||||
2779 | if (const TypeDecl *TD = R.getAsSingle<TypeDecl>()) { | |||
2780 | // Diagnose a missing typename if this resolved unambiguously to a type in | |||
2781 | // a dependent context. If we can recover with a type, downgrade this to | |||
2782 | // a warning in Microsoft compatibility mode. | |||
2783 | unsigned DiagID = diag::err_typename_missing; | |||
2784 | if (RecoveryTSI && getLangOpts().MSVCCompat) | |||
2785 | DiagID = diag::ext_typename_missing; | |||
2786 | SourceLocation Loc = SS.getBeginLoc(); | |||
2787 | auto D = Diag(Loc, DiagID); | |||
2788 | D << SS.getScopeRep() << NameInfo.getName().getAsString() | |||
2789 | << SourceRange(Loc, NameInfo.getEndLoc()); | |||
2790 | ||||
2791 | // Don't recover if the caller isn't expecting us to or if we're in a SFINAE | |||
2792 | // context. | |||
2793 | if (!RecoveryTSI) | |||
2794 | return ExprError(); | |||
2795 | ||||
2796 | // Only issue the fixit if we're prepared to recover. | |||
2797 | D << FixItHint::CreateInsertion(Loc, "typename "); | |||
2798 | ||||
2799 | // Recover by pretending this was an elaborated type. | |||
2800 | QualType Ty = Context.getTypeDeclType(TD); | |||
2801 | TypeLocBuilder TLB; | |||
2802 | TLB.pushTypeSpec(Ty).setNameLoc(NameInfo.getLoc()); | |||
2803 | ||||
2804 | QualType ET = getElaboratedType(ETK_None, SS, Ty); | |||
2805 | ElaboratedTypeLoc QTL = TLB.push<ElaboratedTypeLoc>(ET); | |||
2806 | QTL.setElaboratedKeywordLoc(SourceLocation()); | |||
2807 | QTL.setQualifierLoc(SS.getWithLocInContext(Context)); | |||
2808 | ||||
2809 | *RecoveryTSI = TLB.getTypeSourceInfo(Context, ET); | |||
2810 | ||||
2811 | return ExprEmpty(); | |||
2812 | } | |||
2813 | ||||
2814 | // Defend against this resolving to an implicit member access. We usually | |||
2815 | // won't get here if this might be a legitimate a class member (we end up in | |||
2816 | // BuildMemberReferenceExpr instead), but this can be valid if we're forming | |||
2817 | // a pointer-to-member or in an unevaluated context in C++11. | |||
2818 | if (!R.empty() && (*R.begin())->isCXXClassMember() && !IsAddressOfOperand) | |||
2819 | return BuildPossibleImplicitMemberExpr(SS, | |||
2820 | /*TemplateKWLoc=*/SourceLocation(), | |||
2821 | R, /*TemplateArgs=*/nullptr, S); | |||
2822 | ||||
2823 | return BuildDeclarationNameExpr(SS, R, /* ADL */ false); | |||
2824 | } | |||
2825 | ||||
2826 | /// The parser has read a name in, and Sema has detected that we're currently | |||
2827 | /// inside an ObjC method. Perform some additional checks and determine if we | |||
2828 | /// should form a reference to an ivar. | |||
2829 | /// | |||
2830 | /// Ideally, most of this would be done by lookup, but there's | |||
2831 | /// actually quite a lot of extra work involved. | |||
2832 | DeclResult Sema::LookupIvarInObjCMethod(LookupResult &Lookup, Scope *S, | |||
2833 | IdentifierInfo *II) { | |||
2834 | SourceLocation Loc = Lookup.getNameLoc(); | |||
2835 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | |||
2836 | ||||
2837 | // Check for error condition which is already reported. | |||
2838 | if (!CurMethod) | |||
2839 | return DeclResult(true); | |||
2840 | ||||
2841 | // There are two cases to handle here. 1) scoped lookup could have failed, | |||
2842 | // in which case we should look for an ivar. 2) scoped lookup could have | |||
2843 | // found a decl, but that decl is outside the current instance method (i.e. | |||
2844 | // a global variable). In these two cases, we do a lookup for an ivar with | |||
2845 | // this name, if the lookup sucedes, we replace it our current decl. | |||
2846 | ||||
2847 | // If we're in a class method, we don't normally want to look for | |||
2848 | // ivars. But if we don't find anything else, and there's an | |||
2849 | // ivar, that's an error. | |||
2850 | bool IsClassMethod = CurMethod->isClassMethod(); | |||
2851 | ||||
2852 | bool LookForIvars; | |||
2853 | if (Lookup.empty()) | |||
2854 | LookForIvars = true; | |||
2855 | else if (IsClassMethod) | |||
2856 | LookForIvars = false; | |||
2857 | else | |||
2858 | LookForIvars = (Lookup.isSingleResult() && | |||
2859 | Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod()); | |||
2860 | ObjCInterfaceDecl *IFace = nullptr; | |||
2861 | if (LookForIvars) { | |||
2862 | IFace = CurMethod->getClassInterface(); | |||
2863 | ObjCInterfaceDecl *ClassDeclared; | |||
2864 | ObjCIvarDecl *IV = nullptr; | |||
2865 | if (IFace && (IV = IFace->lookupInstanceVariable(II, ClassDeclared))) { | |||
2866 | // Diagnose using an ivar in a class method. | |||
2867 | if (IsClassMethod) { | |||
2868 | Diag(Loc, diag::err_ivar_use_in_class_method) << IV->getDeclName(); | |||
2869 | return DeclResult(true); | |||
2870 | } | |||
2871 | ||||
2872 | // Diagnose the use of an ivar outside of the declaring class. | |||
2873 | if (IV->getAccessControl() == ObjCIvarDecl::Private && | |||
2874 | !declaresSameEntity(ClassDeclared, IFace) && | |||
2875 | !getLangOpts().DebuggerSupport) | |||
2876 | Diag(Loc, diag::err_private_ivar_access) << IV->getDeclName(); | |||
2877 | ||||
2878 | // Success. | |||
2879 | return IV; | |||
2880 | } | |||
2881 | } else if (CurMethod->isInstanceMethod()) { | |||
2882 | // We should warn if a local variable hides an ivar. | |||
2883 | if (ObjCInterfaceDecl *IFace = CurMethod->getClassInterface()) { | |||
2884 | ObjCInterfaceDecl *ClassDeclared; | |||
2885 | if (ObjCIvarDecl *IV = IFace->lookupInstanceVariable(II, ClassDeclared)) { | |||
2886 | if (IV->getAccessControl() != ObjCIvarDecl::Private || | |||
2887 | declaresSameEntity(IFace, ClassDeclared)) | |||
2888 | Diag(Loc, diag::warn_ivar_use_hidden) << IV->getDeclName(); | |||
2889 | } | |||
2890 | } | |||
2891 | } else if (Lookup.isSingleResult() && | |||
2892 | Lookup.getFoundDecl()->isDefinedOutsideFunctionOrMethod()) { | |||
2893 | // If accessing a stand-alone ivar in a class method, this is an error. | |||
2894 | if (const ObjCIvarDecl *IV = | |||
2895 | dyn_cast<ObjCIvarDecl>(Lookup.getFoundDecl())) { | |||
2896 | Diag(Loc, diag::err_ivar_use_in_class_method) << IV->getDeclName(); | |||
2897 | return DeclResult(true); | |||
2898 | } | |||
2899 | } | |||
2900 | ||||
2901 | // Didn't encounter an error, didn't find an ivar. | |||
2902 | return DeclResult(false); | |||
2903 | } | |||
2904 | ||||
2905 | ExprResult Sema::BuildIvarRefExpr(Scope *S, SourceLocation Loc, | |||
2906 | ObjCIvarDecl *IV) { | |||
2907 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | |||
2908 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 2909, __extension__ __PRETTY_FUNCTION__ )) | |||
2909 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 2909, __extension__ __PRETTY_FUNCTION__ )); | |||
2910 | ||||
2911 | ObjCInterfaceDecl *IFace = CurMethod->getClassInterface(); | |||
2912 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 2912, __extension__ __PRETTY_FUNCTION__ )); | |||
2913 | ||||
2914 | // If we're referencing an invalid decl, just return this as a silent | |||
2915 | // error node. The error diagnostic was already emitted on the decl. | |||
2916 | if (IV->isInvalidDecl()) | |||
2917 | return ExprError(); | |||
2918 | ||||
2919 | // Check if referencing a field with __attribute__((deprecated)). | |||
2920 | if (DiagnoseUseOfDecl(IV, Loc)) | |||
2921 | return ExprError(); | |||
2922 | ||||
2923 | // FIXME: This should use a new expr for a direct reference, don't | |||
2924 | // turn this into Self->ivar, just return a BareIVarExpr or something. | |||
2925 | IdentifierInfo &II = Context.Idents.get("self"); | |||
2926 | UnqualifiedId SelfName; | |||
2927 | SelfName.setImplicitSelfParam(&II); | |||
2928 | CXXScopeSpec SelfScopeSpec; | |||
2929 | SourceLocation TemplateKWLoc; | |||
2930 | ExprResult SelfExpr = | |||
2931 | ActOnIdExpression(S, SelfScopeSpec, TemplateKWLoc, SelfName, | |||
2932 | /*HasTrailingLParen=*/false, | |||
2933 | /*IsAddressOfOperand=*/false); | |||
2934 | if (SelfExpr.isInvalid()) | |||
2935 | return ExprError(); | |||
2936 | ||||
2937 | SelfExpr = DefaultLvalueConversion(SelfExpr.get()); | |||
2938 | if (SelfExpr.isInvalid()) | |||
2939 | return ExprError(); | |||
2940 | ||||
2941 | MarkAnyDeclReferenced(Loc, IV, true); | |||
2942 | ||||
2943 | ObjCMethodFamily MF = CurMethod->getMethodFamily(); | |||
2944 | if (MF != OMF_init && MF != OMF_dealloc && MF != OMF_finalize && | |||
2945 | !IvarBacksCurrentMethodAccessor(IFace, CurMethod, IV)) | |||
2946 | Diag(Loc, diag::warn_direct_ivar_access) << IV->getDeclName(); | |||
2947 | ||||
2948 | ObjCIvarRefExpr *Result = new (Context) | |||
2949 | ObjCIvarRefExpr(IV, IV->getUsageType(SelfExpr.get()->getType()), Loc, | |||
2950 | IV->getLocation(), SelfExpr.get(), true, true); | |||
2951 | ||||
2952 | if (IV->getType().getObjCLifetime() == Qualifiers::OCL_Weak) { | |||
2953 | if (!isUnevaluatedContext() && | |||
2954 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, Loc)) | |||
2955 | getCurFunction()->recordUseOfWeak(Result); | |||
2956 | } | |||
2957 | if (getLangOpts().ObjCAutoRefCount && !isUnevaluatedContext()) | |||
2958 | if (const BlockDecl *BD = CurContext->getInnermostBlockDecl()) | |||
2959 | ImplicitlyRetainedSelfLocs.push_back({Loc, BD}); | |||
2960 | ||||
2961 | return Result; | |||
2962 | } | |||
2963 | ||||
2964 | /// The parser has read a name in, and Sema has detected that we're currently | |||
2965 | /// inside an ObjC method. Perform some additional checks and determine if we | |||
2966 | /// should form a reference to an ivar. If so, build an expression referencing | |||
2967 | /// that ivar. | |||
2968 | ExprResult | |||
2969 | Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S, | |||
2970 | IdentifierInfo *II, bool AllowBuiltinCreation) { | |||
2971 | // FIXME: Integrate this lookup step into LookupParsedName. | |||
2972 | DeclResult Ivar = LookupIvarInObjCMethod(Lookup, S, II); | |||
2973 | if (Ivar.isInvalid()) | |||
2974 | return ExprError(); | |||
2975 | if (Ivar.isUsable()) | |||
2976 | return BuildIvarRefExpr(S, Lookup.getNameLoc(), | |||
2977 | cast<ObjCIvarDecl>(Ivar.get())); | |||
2978 | ||||
2979 | if (Lookup.empty() && II && AllowBuiltinCreation) | |||
2980 | LookupBuiltin(Lookup); | |||
2981 | ||||
2982 | // Sentinel value saying that we didn't do anything special. | |||
2983 | return ExprResult(false); | |||
2984 | } | |||
2985 | ||||
2986 | /// Cast a base object to a member's actual type. | |||
2987 | /// | |||
2988 | /// There are two relevant checks: | |||
2989 | /// | |||
2990 | /// C++ [class.access.base]p7: | |||
2991 | /// | |||
2992 | /// If a class member access operator [...] is used to access a non-static | |||
2993 | /// data member or non-static member function, the reference is ill-formed if | |||
2994 | /// the left operand [...] cannot be implicitly converted to a pointer to the | |||
2995 | /// naming class of the right operand. | |||
2996 | /// | |||
2997 | /// C++ [expr.ref]p7: | |||
2998 | /// | |||
2999 | /// If E2 is a non-static data member or a non-static member function, the | |||
3000 | /// program is ill-formed if the class of which E2 is directly a member is an | |||
3001 | /// ambiguous base (11.8) of the naming class (11.9.3) of E2. | |||
3002 | /// | |||
3003 | /// Note that the latter check does not consider access; the access of the | |||
3004 | /// "real" base class is checked as appropriate when checking the access of the | |||
3005 | /// member name. | |||
3006 | ExprResult | |||
3007 | Sema::PerformObjectMemberConversion(Expr *From, | |||
3008 | NestedNameSpecifier *Qualifier, | |||
3009 | NamedDecl *FoundDecl, | |||
3010 | NamedDecl *Member) { | |||
3011 | const auto *RD = dyn_cast<CXXRecordDecl>(Member->getDeclContext()); | |||
3012 | if (!RD) | |||
3013 | return From; | |||
3014 | ||||
3015 | QualType DestRecordType; | |||
3016 | QualType DestType; | |||
3017 | QualType FromRecordType; | |||
3018 | QualType FromType = From->getType(); | |||
3019 | bool PointerConversions = false; | |||
3020 | if (isa<FieldDecl>(Member)) { | |||
3021 | DestRecordType = Context.getCanonicalType(Context.getTypeDeclType(RD)); | |||
3022 | auto FromPtrType = FromType->getAs<PointerType>(); | |||
3023 | DestRecordType = Context.getAddrSpaceQualType( | |||
3024 | DestRecordType, FromPtrType | |||
3025 | ? FromType->getPointeeType().getAddressSpace() | |||
3026 | : FromType.getAddressSpace()); | |||
3027 | ||||
3028 | if (FromPtrType) { | |||
3029 | DestType = Context.getPointerType(DestRecordType); | |||
3030 | FromRecordType = FromPtrType->getPointeeType(); | |||
3031 | PointerConversions = true; | |||
3032 | } else { | |||
3033 | DestType = DestRecordType; | |||
3034 | FromRecordType = FromType; | |||
3035 | } | |||
3036 | } else if (const auto *Method = dyn_cast<CXXMethodDecl>(Member)) { | |||
3037 | if (Method->isStatic()) | |||
3038 | return From; | |||
3039 | ||||
3040 | DestType = Method->getThisType(); | |||
3041 | DestRecordType = DestType->getPointeeType(); | |||
3042 | ||||
3043 | if (FromType->getAs<PointerType>()) { | |||
3044 | FromRecordType = FromType->getPointeeType(); | |||
3045 | PointerConversions = true; | |||
3046 | } else { | |||
3047 | FromRecordType = FromType; | |||
3048 | DestType = DestRecordType; | |||
3049 | } | |||
3050 | ||||
3051 | LangAS FromAS = FromRecordType.getAddressSpace(); | |||
3052 | LangAS DestAS = DestRecordType.getAddressSpace(); | |||
3053 | if (FromAS != DestAS) { | |||
3054 | QualType FromRecordTypeWithoutAS = | |||
3055 | Context.removeAddrSpaceQualType(FromRecordType); | |||
3056 | QualType FromTypeWithDestAS = | |||
3057 | Context.getAddrSpaceQualType(FromRecordTypeWithoutAS, DestAS); | |||
3058 | if (PointerConversions) | |||
3059 | FromTypeWithDestAS = Context.getPointerType(FromTypeWithDestAS); | |||
3060 | From = ImpCastExprToType(From, FromTypeWithDestAS, | |||
3061 | CK_AddressSpaceConversion, From->getValueKind()) | |||
3062 | .get(); | |||
3063 | } | |||
3064 | } else { | |||
3065 | // No conversion necessary. | |||
3066 | return From; | |||
3067 | } | |||
3068 | ||||
3069 | if (DestType->isDependentType() || FromType->isDependentType()) | |||
3070 | return From; | |||
3071 | ||||
3072 | // If the unqualified types are the same, no conversion is necessary. | |||
3073 | if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType)) | |||
3074 | return From; | |||
3075 | ||||
3076 | SourceRange FromRange = From->getSourceRange(); | |||
3077 | SourceLocation FromLoc = FromRange.getBegin(); | |||
3078 | ||||
3079 | ExprValueKind VK = From->getValueKind(); | |||
3080 | ||||
3081 | // C++ [class.member.lookup]p8: | |||
3082 | // [...] Ambiguities can often be resolved by qualifying a name with its | |||
3083 | // class name. | |||
3084 | // | |||
3085 | // If the member was a qualified name and the qualified referred to a | |||
3086 | // specific base subobject type, we'll cast to that intermediate type | |||
3087 | // first and then to the object in which the member is declared. That allows | |||
3088 | // one to resolve ambiguities in, e.g., a diamond-shaped hierarchy such as: | |||
3089 | // | |||
3090 | // class Base { public: int x; }; | |||
3091 | // class Derived1 : public Base { }; | |||
3092 | // class Derived2 : public Base { }; | |||
3093 | // class VeryDerived : public Derived1, public Derived2 { void f(); }; | |||
3094 | // | |||
3095 | // void VeryDerived::f() { | |||
3096 | // x = 17; // error: ambiguous base subobjects | |||
3097 | // Derived1::x = 17; // okay, pick the Base subobject of Derived1 | |||
3098 | // } | |||
3099 | if (Qualifier && Qualifier->getAsType()) { | |||
3100 | QualType QType = QualType(Qualifier->getAsType(), 0); | |||
3101 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 3101, __extension__ __PRETTY_FUNCTION__ )); | |||
3102 | ||||
3103 | QualType QRecordType = QualType(QType->castAs<RecordType>(), 0); | |||
3104 | ||||
3105 | // In C++98, the qualifier type doesn't actually have to be a base | |||
3106 | // type of the object type, in which case we just ignore it. | |||
3107 | // Otherwise build the appropriate casts. | |||
3108 | if (IsDerivedFrom(FromLoc, FromRecordType, QRecordType)) { | |||
3109 | CXXCastPath BasePath; | |||
3110 | if (CheckDerivedToBaseConversion(FromRecordType, QRecordType, | |||
3111 | FromLoc, FromRange, &BasePath)) | |||
3112 | return ExprError(); | |||
3113 | ||||
3114 | if (PointerConversions) | |||
3115 | QType = Context.getPointerType(QType); | |||
3116 | From = ImpCastExprToType(From, QType, CK_UncheckedDerivedToBase, | |||
3117 | VK, &BasePath).get(); | |||
3118 | ||||
3119 | FromType = QType; | |||
3120 | FromRecordType = QRecordType; | |||
3121 | ||||
3122 | // If the qualifier type was the same as the destination type, | |||
3123 | // we're done. | |||
3124 | if (Context.hasSameUnqualifiedType(FromRecordType, DestRecordType)) | |||
3125 | return From; | |||
3126 | } | |||
3127 | } | |||
3128 | ||||
3129 | CXXCastPath BasePath; | |||
3130 | if (CheckDerivedToBaseConversion(FromRecordType, DestRecordType, | |||
3131 | FromLoc, FromRange, &BasePath, | |||
3132 | /*IgnoreAccess=*/true)) | |||
3133 | return ExprError(); | |||
3134 | ||||
3135 | return ImpCastExprToType(From, DestType, CK_UncheckedDerivedToBase, | |||
3136 | VK, &BasePath); | |||
3137 | } | |||
3138 | ||||
3139 | bool Sema::UseArgumentDependentLookup(const CXXScopeSpec &SS, | |||
3140 | const LookupResult &R, | |||
3141 | bool HasTrailingLParen) { | |||
3142 | // Only when used directly as the postfix-expression of a call. | |||
3143 | if (!HasTrailingLParen) | |||
3144 | return false; | |||
3145 | ||||
3146 | // Never if a scope specifier was provided. | |||
3147 | if (SS.isSet()) | |||
3148 | return false; | |||
3149 | ||||
3150 | // Only in C++ or ObjC++. | |||
3151 | if (!getLangOpts().CPlusPlus) | |||
3152 | return false; | |||
3153 | ||||
3154 | // Turn off ADL when we find certain kinds of declarations during | |||
3155 | // normal lookup: | |||
3156 | for (const NamedDecl *D : R) { | |||
3157 | // C++0x [basic.lookup.argdep]p3: | |||
3158 | // -- a declaration of a class member | |||
3159 | // Since using decls preserve this property, we check this on the | |||
3160 | // original decl. | |||
3161 | if (D->isCXXClassMember()) | |||
3162 | return false; | |||
3163 | ||||
3164 | // C++0x [basic.lookup.argdep]p3: | |||
3165 | // -- a block-scope function declaration that is not a | |||
3166 | // using-declaration | |||
3167 | // NOTE: we also trigger this for function templates (in fact, we | |||
3168 | // don't check the decl type at all, since all other decl types | |||
3169 | // turn off ADL anyway). | |||
3170 | if (isa<UsingShadowDecl>(D)) | |||
3171 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | |||
3172 | else if (D->getLexicalDeclContext()->isFunctionOrMethod()) | |||
3173 | return false; | |||
3174 | ||||
3175 | // C++0x [basic.lookup.argdep]p3: | |||
3176 | // -- a declaration that is neither a function or a function | |||
3177 | // template | |||
3178 | // And also for builtin functions. | |||
3179 | if (const auto *FDecl = dyn_cast<FunctionDecl>(D)) { | |||
3180 | // But also builtin functions. | |||
3181 | if (FDecl->getBuiltinID() && FDecl->isImplicit()) | |||
3182 | return false; | |||
3183 | } else if (!isa<FunctionTemplateDecl>(D)) | |||
3184 | return false; | |||
3185 | } | |||
3186 | ||||
3187 | return true; | |||
3188 | } | |||
3189 | ||||
3190 | ||||
3191 | /// Diagnoses obvious problems with the use of the given declaration | |||
3192 | /// as an expression. This is only actually called for lookups that | |||
3193 | /// were not overloaded, and it doesn't promise that the declaration | |||
3194 | /// will in fact be used. | |||
3195 | static bool CheckDeclInExpr(Sema &S, SourceLocation Loc, NamedDecl *D, | |||
3196 | bool AcceptInvalid) { | |||
3197 | if (D->isInvalidDecl() && !AcceptInvalid) | |||
3198 | return true; | |||
3199 | ||||
3200 | if (isa<TypedefNameDecl>(D)) { | |||
3201 | S.Diag(Loc, diag::err_unexpected_typedef) << D->getDeclName(); | |||
3202 | return true; | |||
3203 | } | |||
3204 | ||||
3205 | if (isa<ObjCInterfaceDecl>(D)) { | |||
3206 | S.Diag(Loc, diag::err_unexpected_interface) << D->getDeclName(); | |||
3207 | return true; | |||
3208 | } | |||
3209 | ||||
3210 | if (isa<NamespaceDecl>(D)) { | |||
3211 | S.Diag(Loc, diag::err_unexpected_namespace) << D->getDeclName(); | |||
3212 | return true; | |||
3213 | } | |||
3214 | ||||
3215 | return false; | |||
3216 | } | |||
3217 | ||||
3218 | // Certain multiversion types should be treated as overloaded even when there is | |||
3219 | // only one result. | |||
3220 | static bool ShouldLookupResultBeMultiVersionOverload(const LookupResult &R) { | |||
3221 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 3221, __extension__ __PRETTY_FUNCTION__ )); | |||
3222 | const auto *FD = dyn_cast<FunctionDecl>(R.getFoundDecl()); | |||
3223 | return FD && | |||
3224 | (FD->isCPUDispatchMultiVersion() || FD->isCPUSpecificMultiVersion()); | |||
3225 | } | |||
3226 | ||||
3227 | ExprResult Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS, | |||
3228 | LookupResult &R, bool NeedsADL, | |||
3229 | bool AcceptInvalidDecl) { | |||
3230 | // If this is a single, fully-resolved result and we don't need ADL, | |||
3231 | // just build an ordinary singleton decl ref. | |||
3232 | if (!NeedsADL && R.isSingleResult() && | |||
3233 | !R.getAsSingle<FunctionTemplateDecl>() && | |||
3234 | !ShouldLookupResultBeMultiVersionOverload(R)) | |||
3235 | return BuildDeclarationNameExpr(SS, R.getLookupNameInfo(), R.getFoundDecl(), | |||
3236 | R.getRepresentativeDecl(), nullptr, | |||
3237 | AcceptInvalidDecl); | |||
3238 | ||||
3239 | // We only need to check the declaration if there's exactly one | |||
3240 | // result, because in the overloaded case the results can only be | |||
3241 | // functions and function templates. | |||
3242 | if (R.isSingleResult() && !ShouldLookupResultBeMultiVersionOverload(R) && | |||
3243 | CheckDeclInExpr(*this, R.getNameLoc(), R.getFoundDecl(), | |||
3244 | AcceptInvalidDecl)) | |||
3245 | return ExprError(); | |||
3246 | ||||
3247 | // Otherwise, just build an unresolved lookup expression. Suppress | |||
3248 | // any lookup-related diagnostics; we'll hash these out later, when | |||
3249 | // we've picked a target. | |||
3250 | R.suppressDiagnostics(); | |||
3251 | ||||
3252 | UnresolvedLookupExpr *ULE | |||
3253 | = UnresolvedLookupExpr::Create(Context, R.getNamingClass(), | |||
3254 | SS.getWithLocInContext(Context), | |||
3255 | R.getLookupNameInfo(), | |||
3256 | NeedsADL, R.isOverloadedResult(), | |||
3257 | R.begin(), R.end()); | |||
3258 | ||||
3259 | return ULE; | |||
3260 | } | |||
3261 | ||||
3262 | static void diagnoseUncapturableValueReferenceOrBinding(Sema &S, | |||
3263 | SourceLocation loc, | |||
3264 | ValueDecl *var); | |||
3265 | ||||
3266 | /// Complete semantic analysis for a reference to the given declaration. | |||
3267 | ExprResult Sema::BuildDeclarationNameExpr( | |||
3268 | const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, NamedDecl *D, | |||
3269 | NamedDecl *FoundD, const TemplateArgumentListInfo *TemplateArgs, | |||
3270 | bool AcceptInvalidDecl) { | |||
3271 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 3271, __extension__ __PRETTY_FUNCTION__ )); | |||
3272 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 3273, __extension__ __PRETTY_FUNCTION__ )) | |||
3273 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 3273, __extension__ __PRETTY_FUNCTION__ )); | |||
3274 | ||||
3275 | SourceLocation Loc = NameInfo.getLoc(); | |||
3276 | if (CheckDeclInExpr(*this, Loc, D, AcceptInvalidDecl)) { | |||
3277 | // Recovery from invalid cases (e.g. D is an invalid Decl). | |||
3278 | // We use the dependent type for the RecoveryExpr to prevent bogus follow-up | |||
3279 | // diagnostics, as invalid decls use int as a fallback type. | |||
3280 | return CreateRecoveryExpr(NameInfo.getBeginLoc(), NameInfo.getEndLoc(), {}); | |||
3281 | } | |||
3282 | ||||
3283 | if (TemplateDecl *Template = dyn_cast<TemplateDecl>(D)) { | |||
3284 | // Specifically diagnose references to class templates that are missing | |||
3285 | // a template argument list. | |||
3286 | diagnoseMissingTemplateArguments(TemplateName(Template), Loc); | |||
3287 | return ExprError(); | |||
3288 | } | |||
3289 | ||||
3290 | // Make sure that we're referring to a value. | |||
3291 | if (!isa<ValueDecl, UnresolvedUsingIfExistsDecl>(D)) { | |||
3292 | Diag(Loc, diag::err_ref_non_value) << D << SS.getRange(); | |||
3293 | Diag(D->getLocation(), diag::note_declared_at); | |||
3294 | return ExprError(); | |||
3295 | } | |||
3296 | ||||
3297 | // Check whether this declaration can be used. Note that we suppress | |||
3298 | // this check when we're going to perform argument-dependent lookup | |||
3299 | // on this function name, because this might not be the function | |||
3300 | // that overload resolution actually selects. | |||
3301 | if (DiagnoseUseOfDecl(D, Loc)) | |||
3302 | return ExprError(); | |||
3303 | ||||
3304 | auto *VD = cast<ValueDecl>(D); | |||
3305 | ||||
3306 | // Only create DeclRefExpr's for valid Decl's. | |||
3307 | if (VD->isInvalidDecl() && !AcceptInvalidDecl) | |||
3308 | return ExprError(); | |||
3309 | ||||
3310 | // Handle members of anonymous structs and unions. If we got here, | |||
3311 | // and the reference is to a class member indirect field, then this | |||
3312 | // must be the subject of a pointer-to-member expression. | |||
3313 | if (auto *IndirectField = dyn_cast<IndirectFieldDecl>(VD); | |||
3314 | IndirectField && !IndirectField->isCXXClassMember()) | |||
3315 | return BuildAnonymousStructUnionMemberReference(SS, NameInfo.getLoc(), | |||
3316 | IndirectField); | |||
3317 | ||||
3318 | QualType type = VD->getType(); | |||
3319 | if (type.isNull()) | |||
3320 | return ExprError(); | |||
3321 | ExprValueKind valueKind = VK_PRValue; | |||
3322 | ||||
3323 | // In 'T ...V;', the type of the declaration 'V' is 'T...', but the type of | |||
3324 | // a reference to 'V' is simply (unexpanded) 'T'. The type, like the value, | |||
3325 | // is expanded by some outer '...' in the context of the use. | |||
3326 | type = type.getNonPackExpansionType(); | |||
3327 | ||||
3328 | switch (D->getKind()) { | |||
3329 | // Ignore all the non-ValueDecl kinds. | |||
3330 | #define ABSTRACT_DECL(kind) | |||
3331 | #define VALUE(type, base) | |||
3332 | #define DECL(type, base) case Decl::type: | |||
3333 | #include "clang/AST/DeclNodes.inc" | |||
3334 | llvm_unreachable("invalid value decl kind")::llvm::llvm_unreachable_internal("invalid value decl kind", "clang/lib/Sema/SemaExpr.cpp" , 3334); | |||
3335 | ||||
3336 | // These shouldn't make it here. | |||
3337 | case Decl::ObjCAtDefsField: | |||
3338 | llvm_unreachable("forming non-member reference to ivar?")::llvm::llvm_unreachable_internal("forming non-member reference to ivar?" , "clang/lib/Sema/SemaExpr.cpp", 3338); | |||
3339 | ||||
3340 | // Enum constants are always r-values and never references. | |||
3341 | // Unresolved using declarations are dependent. | |||
3342 | case Decl::EnumConstant: | |||
3343 | case Decl::UnresolvedUsingValue: | |||
3344 | case Decl::OMPDeclareReduction: | |||
3345 | case Decl::OMPDeclareMapper: | |||
3346 | valueKind = VK_PRValue; | |||
3347 | break; | |||
3348 | ||||
3349 | // Fields and indirect fields that got here must be for | |||
3350 | // pointer-to-member expressions; we just call them l-values for | |||
3351 | // internal consistency, because this subexpression doesn't really | |||
3352 | // exist in the high-level semantics. | |||
3353 | case Decl::Field: | |||
3354 | case Decl::IndirectField: | |||
3355 | case Decl::ObjCIvar: | |||
3356 | 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?\"" , "clang/lib/Sema/SemaExpr.cpp", 3356, __extension__ __PRETTY_FUNCTION__ )); | |||
3357 | ||||
3358 | // These can't have reference type in well-formed programs, but | |||
3359 | // for internal consistency we do this anyway. | |||
3360 | type = type.getNonReferenceType(); | |||
3361 | valueKind = VK_LValue; | |||
3362 | break; | |||
3363 | ||||
3364 | // Non-type template parameters are either l-values or r-values | |||
3365 | // depending on the type. | |||
3366 | case Decl::NonTypeTemplateParm: { | |||
3367 | if (const ReferenceType *reftype = type->getAs<ReferenceType>()) { | |||
3368 | type = reftype->getPointeeType(); | |||
3369 | valueKind = VK_LValue; // even if the parameter is an r-value reference | |||
3370 | break; | |||
3371 | } | |||
3372 | ||||
3373 | // [expr.prim.id.unqual]p2: | |||
3374 | // If the entity is a template parameter object for a template | |||
3375 | // parameter of type T, the type of the expression is const T. | |||
3376 | // [...] The expression is an lvalue if the entity is a [...] template | |||
3377 | // parameter object. | |||
3378 | if (type->isRecordType()) { | |||
3379 | type = type.getUnqualifiedType().withConst(); | |||
3380 | valueKind = VK_LValue; | |||
3381 | break; | |||
3382 | } | |||
3383 | ||||
3384 | // For non-references, we need to strip qualifiers just in case | |||
3385 | // the template parameter was declared as 'const int' or whatever. | |||
3386 | valueKind = VK_PRValue; | |||
3387 | type = type.getUnqualifiedType(); | |||
3388 | break; | |||
3389 | } | |||
3390 | ||||
3391 | case Decl::Var: | |||
3392 | case Decl::VarTemplateSpecialization: | |||
3393 | case Decl::VarTemplatePartialSpecialization: | |||
3394 | case Decl::Decomposition: | |||
3395 | case Decl::OMPCapturedExpr: | |||
3396 | // In C, "extern void blah;" is valid and is an r-value. | |||
3397 | if (!getLangOpts().CPlusPlus && !type.hasQualifiers() && | |||
3398 | type->isVoidType()) { | |||
3399 | valueKind = VK_PRValue; | |||
3400 | break; | |||
3401 | } | |||
3402 | [[fallthrough]]; | |||
3403 | ||||
3404 | case Decl::ImplicitParam: | |||
3405 | case Decl::ParmVar: { | |||
3406 | // These are always l-values. | |||
3407 | valueKind = VK_LValue; | |||
3408 | type = type.getNonReferenceType(); | |||
3409 | ||||
3410 | // FIXME: Does the addition of const really only apply in | |||
3411 | // potentially-evaluated contexts? Since the variable isn't actually | |||
3412 | // captured in an unevaluated context, it seems that the answer is no. | |||
3413 | if (!isUnevaluatedContext()) { | |||
3414 | QualType CapturedType = getCapturedDeclRefType(cast<VarDecl>(VD), Loc); | |||
3415 | if (!CapturedType.isNull()) | |||
3416 | type = CapturedType; | |||
3417 | } | |||
3418 | ||||
3419 | break; | |||
3420 | } | |||
3421 | ||||
3422 | case Decl::Binding: | |||
3423 | // These are always lvalues. | |||
3424 | valueKind = VK_LValue; | |||
3425 | type = type.getNonReferenceType(); | |||
3426 | break; | |||
3427 | ||||
3428 | case Decl::Function: { | |||
3429 | if (unsigned BID = cast<FunctionDecl>(VD)->getBuiltinID()) { | |||
3430 | if (!Context.BuiltinInfo.isDirectlyAddressable(BID)) { | |||
3431 | type = Context.BuiltinFnTy; | |||
3432 | valueKind = VK_PRValue; | |||
3433 | break; | |||
3434 | } | |||
3435 | } | |||
3436 | ||||
3437 | const FunctionType *fty = type->castAs<FunctionType>(); | |||
3438 | ||||
3439 | // If we're referring to a function with an __unknown_anytype | |||
3440 | // result type, make the entire expression __unknown_anytype. | |||
3441 | if (fty->getReturnType() == Context.UnknownAnyTy) { | |||
3442 | type = Context.UnknownAnyTy; | |||
3443 | valueKind = VK_PRValue; | |||
3444 | break; | |||
3445 | } | |||
3446 | ||||
3447 | // Functions are l-values in C++. | |||
3448 | if (getLangOpts().CPlusPlus) { | |||
3449 | valueKind = VK_LValue; | |||
3450 | break; | |||
3451 | } | |||
3452 | ||||
3453 | // C99 DR 316 says that, if a function type comes from a | |||
3454 | // function definition (without a prototype), that type is only | |||
3455 | // used for checking compatibility. Therefore, when referencing | |||
3456 | // the function, we pretend that we don't have the full function | |||
3457 | // type. | |||
3458 | if (!cast<FunctionDecl>(VD)->hasPrototype() && isa<FunctionProtoType>(fty)) | |||
3459 | type = Context.getFunctionNoProtoType(fty->getReturnType(), | |||
3460 | fty->getExtInfo()); | |||
3461 | ||||
3462 | // Functions are r-values in C. | |||
3463 | valueKind = VK_PRValue; | |||
3464 | break; | |||
3465 | } | |||
3466 | ||||
3467 | case Decl::CXXDeductionGuide: | |||
3468 | llvm_unreachable("building reference to deduction guide")::llvm::llvm_unreachable_internal("building reference to deduction guide" , "clang/lib/Sema/SemaExpr.cpp", 3468); | |||
3469 | ||||
3470 | case Decl::MSProperty: | |||
3471 | case Decl::MSGuid: | |||
3472 | case Decl::TemplateParamObject: | |||
3473 | // FIXME: Should MSGuidDecl and template parameter objects be subject to | |||
3474 | // capture in OpenMP, or duplicated between host and device? | |||
3475 | valueKind = VK_LValue; | |||
3476 | break; | |||
3477 | ||||
3478 | case Decl::UnnamedGlobalConstant: | |||
3479 | valueKind = VK_LValue; | |||
3480 | break; | |||
3481 | ||||
3482 | case Decl::CXXMethod: | |||
3483 | // If we're referring to a method with an __unknown_anytype | |||
3484 | // result type, make the entire expression __unknown_anytype. | |||
3485 | // This should only be possible with a type written directly. | |||
3486 | if (const FunctionProtoType *proto = | |||
3487 | dyn_cast<FunctionProtoType>(VD->getType())) | |||
3488 | if (proto->getReturnType() == Context.UnknownAnyTy) { | |||
3489 | type = Context.UnknownAnyTy; | |||
3490 | valueKind = VK_PRValue; | |||
3491 | break; | |||
3492 | } | |||
3493 | ||||
3494 | // C++ methods are l-values if static, r-values if non-static. | |||
3495 | if (cast<CXXMethodDecl>(VD)->isStatic()) { | |||
3496 | valueKind = VK_LValue; | |||
3497 | break; | |||
3498 | } | |||
3499 | [[fallthrough]]; | |||
3500 | ||||
3501 | case Decl::CXXConversion: | |||
3502 | case Decl::CXXDestructor: | |||
3503 | case Decl::CXXConstructor: | |||
3504 | valueKind = VK_PRValue; | |||
3505 | break; | |||
3506 | } | |||
3507 | ||||
3508 | auto *E = | |||
3509 | BuildDeclRefExpr(VD, type, valueKind, NameInfo, &SS, FoundD, | |||
3510 | /*FIXME: TemplateKWLoc*/ SourceLocation(), TemplateArgs); | |||
3511 | // Clang AST consumers assume a DeclRefExpr refers to a valid decl. We | |||
3512 | // wrap a DeclRefExpr referring to an invalid decl with a dependent-type | |||
3513 | // RecoveryExpr to avoid follow-up semantic analysis (thus prevent bogus | |||
3514 | // diagnostics). | |||
3515 | if (VD->isInvalidDecl() && E) | |||
3516 | return CreateRecoveryExpr(E->getBeginLoc(), E->getEndLoc(), {E}); | |||
3517 | return E; | |||
3518 | } | |||
3519 | ||||
3520 | static void ConvertUTF8ToWideString(unsigned CharByteWidth, StringRef Source, | |||
3521 | SmallString<32> &Target) { | |||
3522 | Target.resize(CharByteWidth * (Source.size() + 1)); | |||
3523 | char *ResultPtr = &Target[0]; | |||
3524 | const llvm::UTF8 *ErrorPtr; | |||
3525 | bool success = | |||
3526 | llvm::ConvertUTF8toWide(CharByteWidth, Source, ResultPtr, ErrorPtr); | |||
3527 | (void)success; | |||
3528 | assert(success)(static_cast <bool> (success) ? void (0) : __assert_fail ("success", "clang/lib/Sema/SemaExpr.cpp", 3528, __extension__ __PRETTY_FUNCTION__)); | |||
3529 | Target.resize(ResultPtr - &Target[0]); | |||
3530 | } | |||
3531 | ||||
3532 | ExprResult Sema::BuildPredefinedExpr(SourceLocation Loc, | |||
3533 | PredefinedExpr::IdentKind IK) { | |||
3534 | // Pick the current block, lambda, captured statement or function. | |||
3535 | Decl *currentDecl = nullptr; | |||
3536 | if (const BlockScopeInfo *BSI = getCurBlock()) | |||
3537 | currentDecl = BSI->TheDecl; | |||
3538 | else if (const LambdaScopeInfo *LSI = getCurLambda()) | |||
3539 | currentDecl = LSI->CallOperator; | |||
3540 | else if (const CapturedRegionScopeInfo *CSI = getCurCapturedRegion()) | |||
3541 | currentDecl = CSI->TheCapturedDecl; | |||
3542 | else | |||
3543 | currentDecl = getCurFunctionOrMethodDecl(); | |||
3544 | ||||
3545 | if (!currentDecl) { | |||
3546 | Diag(Loc, diag::ext_predef_outside_function); | |||
3547 | currentDecl = Context.getTranslationUnitDecl(); | |||
3548 | } | |||
3549 | ||||
3550 | QualType ResTy; | |||
3551 | StringLiteral *SL = nullptr; | |||
3552 | if (cast<DeclContext>(currentDecl)->isDependentContext()) | |||
3553 | ResTy = Context.DependentTy; | |||
3554 | else { | |||
3555 | // Pre-defined identifiers are of type char[x], where x is the length of | |||
3556 | // the string. | |||
3557 | auto Str = PredefinedExpr::ComputeName(IK, currentDecl); | |||
3558 | unsigned Length = Str.length(); | |||
3559 | ||||
3560 | llvm::APInt LengthI(32, Length + 1); | |||
3561 | if (IK == PredefinedExpr::LFunction || IK == PredefinedExpr::LFuncSig) { | |||
3562 | ResTy = | |||
3563 | Context.adjustStringLiteralBaseType(Context.WideCharTy.withConst()); | |||
3564 | SmallString<32> RawChars; | |||
3565 | ConvertUTF8ToWideString(Context.getTypeSizeInChars(ResTy).getQuantity(), | |||
3566 | Str, RawChars); | |||
3567 | ResTy = Context.getConstantArrayType(ResTy, LengthI, nullptr, | |||
3568 | ArrayType::Normal, | |||
3569 | /*IndexTypeQuals*/ 0); | |||
3570 | SL = StringLiteral::Create(Context, RawChars, StringLiteral::Wide, | |||
3571 | /*Pascal*/ false, ResTy, Loc); | |||
3572 | } else { | |||
3573 | ResTy = Context.adjustStringLiteralBaseType(Context.CharTy.withConst()); | |||
3574 | ResTy = Context.getConstantArrayType(ResTy, LengthI, nullptr, | |||
3575 | ArrayType::Normal, | |||
3576 | /*IndexTypeQuals*/ 0); | |||
3577 | SL = StringLiteral::Create(Context, Str, StringLiteral::Ordinary, | |||
3578 | /*Pascal*/ false, ResTy, Loc); | |||
3579 | } | |||
3580 | } | |||
3581 | ||||
3582 | return PredefinedExpr::Create(Context, Loc, ResTy, IK, SL); | |||
3583 | } | |||
3584 | ||||
3585 | ExprResult Sema::BuildSYCLUniqueStableNameExpr(SourceLocation OpLoc, | |||
3586 | SourceLocation LParen, | |||
3587 | SourceLocation RParen, | |||
3588 | TypeSourceInfo *TSI) { | |||
3589 | return SYCLUniqueStableNameExpr::Create(Context, OpLoc, LParen, RParen, TSI); | |||
3590 | } | |||
3591 | ||||
3592 | ExprResult Sema::ActOnSYCLUniqueStableNameExpr(SourceLocation OpLoc, | |||
3593 | SourceLocation LParen, | |||
3594 | SourceLocation RParen, | |||
3595 | ParsedType ParsedTy) { | |||
3596 | TypeSourceInfo *TSI = nullptr; | |||
3597 | QualType Ty = GetTypeFromParser(ParsedTy, &TSI); | |||
3598 | ||||
3599 | if (Ty.isNull()) | |||
3600 | return ExprError(); | |||
3601 | if (!TSI) | |||
3602 | TSI = Context.getTrivialTypeSourceInfo(Ty, LParen); | |||
3603 | ||||
3604 | return BuildSYCLUniqueStableNameExpr(OpLoc, LParen, RParen, TSI); | |||
3605 | } | |||
3606 | ||||
3607 | ExprResult Sema::ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind) { | |||
3608 | PredefinedExpr::IdentKind IK; | |||
3609 | ||||
3610 | switch (Kind) { | |||
3611 | default: llvm_unreachable("Unknown simple primary expr!")::llvm::llvm_unreachable_internal("Unknown simple primary expr!" , "clang/lib/Sema/SemaExpr.cpp", 3611); | |||
3612 | case tok::kw___func__: IK = PredefinedExpr::Func; break; // [C99 6.4.2.2] | |||
3613 | case tok::kw___FUNCTION__: IK = PredefinedExpr::Function; break; | |||
3614 | case tok::kw___FUNCDNAME__: IK = PredefinedExpr::FuncDName; break; // [MS] | |||
3615 | case tok::kw___FUNCSIG__: IK = PredefinedExpr::FuncSig; break; // [MS] | |||
3616 | case tok::kw_L__FUNCTION__: IK = PredefinedExpr::LFunction; break; // [MS] | |||
3617 | case tok::kw_L__FUNCSIG__: IK = PredefinedExpr::LFuncSig; break; // [MS] | |||
3618 | case tok::kw___PRETTY_FUNCTION__: IK = PredefinedExpr::PrettyFunction; break; | |||
3619 | } | |||
3620 | ||||
3621 | return BuildPredefinedExpr(Loc, IK); | |||
3622 | } | |||
3623 | ||||
3624 | ExprResult Sema::ActOnCharacterConstant(const Token &Tok, Scope *UDLScope) { | |||
3625 | SmallString<16> CharBuffer; | |||
3626 | bool Invalid = false; | |||
3627 | StringRef ThisTok = PP.getSpelling(Tok, CharBuffer, &Invalid); | |||
3628 | if (Invalid) | |||
3629 | return ExprError(); | |||
3630 | ||||
3631 | CharLiteralParser Literal(ThisTok.begin(), ThisTok.end(), Tok.getLocation(), | |||
3632 | PP, Tok.getKind()); | |||
3633 | if (Literal.hadError()) | |||
3634 | return ExprError(); | |||
3635 | ||||
3636 | QualType Ty; | |||
3637 | if (Literal.isWide()) | |||
3638 | Ty = Context.WideCharTy; // L'x' -> wchar_t in C and C++. | |||
3639 | else if (Literal.isUTF8() && getLangOpts().C2x) | |||
3640 | Ty = Context.UnsignedCharTy; // u8'x' -> unsigned char in C2x | |||
3641 | else if (Literal.isUTF8() && getLangOpts().Char8) | |||
3642 | Ty = Context.Char8Ty; // u8'x' -> char8_t when it exists. | |||
3643 | else if (Literal.isUTF16()) | |||
3644 | Ty = Context.Char16Ty; // u'x' -> char16_t in C11 and C++11. | |||
3645 | else if (Literal.isUTF32()) | |||
3646 | Ty = Context.Char32Ty; // U'x' -> char32_t in C11 and C++11. | |||
3647 | else if (!getLangOpts().CPlusPlus || Literal.isMultiChar()) | |||
3648 | Ty = Context.IntTy; // 'x' -> int in C, 'wxyz' -> int in C++. | |||
3649 | else | |||
3650 | Ty = Context.CharTy; // 'x' -> char in C++; | |||
3651 | // u8'x' -> char in C11-C17 and in C++ without char8_t. | |||
3652 | ||||
3653 | CharacterLiteral::CharacterKind Kind = CharacterLiteral::Ascii; | |||
3654 | if (Literal.isWide()) | |||
3655 | Kind = CharacterLiteral::Wide; | |||
3656 | else if (Literal.isUTF16()) | |||
3657 | Kind = CharacterLiteral::UTF16; | |||
3658 | else if (Literal.isUTF32()) | |||
3659 | Kind = CharacterLiteral::UTF32; | |||
3660 | else if (Literal.isUTF8()) | |||
3661 | Kind = CharacterLiteral::UTF8; | |||
3662 | ||||
3663 | Expr *Lit = new (Context) CharacterLiteral(Literal.getValue(), Kind, Ty, | |||
3664 | Tok.getLocation()); | |||
3665 | ||||
3666 | if (Literal.getUDSuffix().empty()) | |||
3667 | return Lit; | |||
3668 | ||||
3669 | // We're building a user-defined literal. | |||
3670 | IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
3671 | SourceLocation UDSuffixLoc = | |||
3672 | getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset()); | |||
3673 | ||||
3674 | // Make sure we're allowed user-defined literals here. | |||
3675 | if (!UDLScope) | |||
3676 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_character_udl)); | |||
3677 | ||||
3678 | // C++11 [lex.ext]p6: The literal L is treated as a call of the form | |||
3679 | // operator "" X (ch) | |||
3680 | return BuildCookedLiteralOperatorCall(*this, UDLScope, UDSuffix, UDSuffixLoc, | |||
3681 | Lit, Tok.getLocation()); | |||
3682 | } | |||
3683 | ||||
3684 | ExprResult Sema::ActOnIntegerConstant(SourceLocation Loc, uint64_t Val) { | |||
3685 | unsigned IntSize = Context.getTargetInfo().getIntWidth(); | |||
3686 | return IntegerLiteral::Create(Context, llvm::APInt(IntSize, Val), | |||
3687 | Context.IntTy, Loc); | |||
3688 | } | |||
3689 | ||||
3690 | static Expr *BuildFloatingLiteral(Sema &S, NumericLiteralParser &Literal, | |||
3691 | QualType Ty, SourceLocation Loc) { | |||
3692 | const llvm::fltSemantics &Format = S.Context.getFloatTypeSemantics(Ty); | |||
3693 | ||||
3694 | using llvm::APFloat; | |||
3695 | APFloat Val(Format); | |||
3696 | ||||
3697 | APFloat::opStatus result = Literal.GetFloatValue(Val); | |||
3698 | ||||
3699 | // Overflow is always an error, but underflow is only an error if | |||
3700 | // we underflowed to zero (APFloat reports denormals as underflow). | |||
3701 | if ((result & APFloat::opOverflow) || | |||
3702 | ((result & APFloat::opUnderflow) && Val.isZero())) { | |||
3703 | unsigned diagnostic; | |||
3704 | SmallString<20> buffer; | |||
3705 | if (result & APFloat::opOverflow) { | |||
3706 | diagnostic = diag::warn_float_overflow; | |||
3707 | APFloat::getLargest(Format).toString(buffer); | |||
3708 | } else { | |||
3709 | diagnostic = diag::warn_float_underflow; | |||
3710 | APFloat::getSmallest(Format).toString(buffer); | |||
3711 | } | |||
3712 | ||||
3713 | S.Diag(Loc, diagnostic) | |||
3714 | << Ty | |||
3715 | << StringRef(buffer.data(), buffer.size()); | |||
3716 | } | |||
3717 | ||||
3718 | bool isExact = (result == APFloat::opOK); | |||
3719 | return FloatingLiteral::Create(S.Context, Val, isExact, Ty, Loc); | |||
3720 | } | |||
3721 | ||||
3722 | bool Sema::CheckLoopHintExpr(Expr *E, SourceLocation Loc) { | |||
3723 | assert(E && "Invalid expression")(static_cast <bool> (E && "Invalid expression") ? void (0) : __assert_fail ("E && \"Invalid expression\"" , "clang/lib/Sema/SemaExpr.cpp", 3723, __extension__ __PRETTY_FUNCTION__ )); | |||
3724 | ||||
3725 | if (E->isValueDependent()) | |||
3726 | return false; | |||
3727 | ||||
3728 | QualType QT = E->getType(); | |||
3729 | if (!QT->isIntegerType() || QT->isBooleanType() || QT->isCharType()) { | |||
3730 | Diag(E->getExprLoc(), diag::err_pragma_loop_invalid_argument_type) << QT; | |||
3731 | return true; | |||
3732 | } | |||
3733 | ||||
3734 | llvm::APSInt ValueAPS; | |||
3735 | ExprResult R = VerifyIntegerConstantExpression(E, &ValueAPS); | |||
3736 | ||||
3737 | if (R.isInvalid()) | |||
3738 | return true; | |||
3739 | ||||
3740 | bool ValueIsPositive = ValueAPS.isStrictlyPositive(); | |||
3741 | if (!ValueIsPositive || ValueAPS.getActiveBits() > 31) { | |||
3742 | Diag(E->getExprLoc(), diag::err_pragma_loop_invalid_argument_value) | |||
3743 | << toString(ValueAPS, 10) << ValueIsPositive; | |||
3744 | return true; | |||
3745 | } | |||
3746 | ||||
3747 | return false; | |||
3748 | } | |||
3749 | ||||
3750 | ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) { | |||
3751 | // Fast path for a single digit (which is quite common). A single digit | |||
3752 | // cannot have a trigraph, escaped newline, radix prefix, or suffix. | |||
3753 | if (Tok.getLength() == 1) { | |||
3754 | const char Val = PP.getSpellingOfSingleCharacterNumericConstant(Tok); | |||
3755 | return ActOnIntegerConstant(Tok.getLocation(), Val-'0'); | |||
3756 | } | |||
3757 | ||||
3758 | SmallString<128> SpellingBuffer; | |||
3759 | // NumericLiteralParser wants to overread by one character. Add padding to | |||
3760 | // the buffer in case the token is copied to the buffer. If getSpelling() | |||
3761 | // returns a StringRef to the memory buffer, it should have a null char at | |||
3762 | // the EOF, so it is also safe. | |||
3763 | SpellingBuffer.resize(Tok.getLength() + 1); | |||
3764 | ||||
3765 | // Get the spelling of the token, which eliminates trigraphs, etc. | |||
3766 | bool Invalid = false; | |||
3767 | StringRef TokSpelling = PP.getSpelling(Tok, SpellingBuffer, &Invalid); | |||
3768 | if (Invalid) | |||
3769 | return ExprError(); | |||
3770 | ||||
3771 | NumericLiteralParser Literal(TokSpelling, Tok.getLocation(), | |||
3772 | PP.getSourceManager(), PP.getLangOpts(), | |||
3773 | PP.getTargetInfo(), PP.getDiagnostics()); | |||
3774 | if (Literal.hadError) | |||
3775 | return ExprError(); | |||
3776 | ||||
3777 | if (Literal.hasUDSuffix()) { | |||
3778 | // We're building a user-defined literal. | |||
3779 | const IdentifierInfo *UDSuffix = &Context.Idents.get(Literal.getUDSuffix()); | |||
3780 | SourceLocation UDSuffixLoc = | |||
3781 | getUDSuffixLoc(*this, Tok.getLocation(), Literal.getUDSuffixOffset()); | |||
3782 | ||||
3783 | // Make sure we're allowed user-defined literals here. | |||
3784 | if (!UDLScope) | |||
3785 | return ExprError(Diag(UDSuffixLoc, diag::err_invalid_numeric_udl)); | |||
3786 | ||||
3787 | QualType CookedTy; | |||
3788 | if (Literal.isFloatingLiteral()) { | |||
3789 | // C++11 [lex.ext]p4: If S contains a literal operator with parameter type | |||
3790 | // long double, the literal is treated as a call of the form | |||
3791 | // operator "" X (f L) | |||
3792 | CookedTy = Context.LongDoubleTy; | |||
3793 | } else { | |||
3794 | // C++11 [lex.ext]p3: If S contains a literal operator with parameter type | |||
3795 | // unsigned long long, the literal is treated as a call of the form | |||
3796 | // operator "" X (n ULL) | |||
3797 | CookedTy = Context.UnsignedLongLongTy; | |||
3798 | } | |||
3799 | ||||
3800 | DeclarationName OpName = | |||
3801 | Context.DeclarationNames.getCXXLiteralOperatorName(UDSuffix); | |||
3802 | DeclarationNameInfo OpNameInfo(OpName, UDSuffixLoc); | |||
3803 | OpNameInfo.setCXXLiteralOperatorNameLoc(UDSuffixLoc); | |||
3804 | ||||
3805 | SourceLocation TokLoc = Tok.getLocation(); | |||
3806 | ||||
3807 | // Perform literal operator lookup to determine if we're building a raw | |||
3808 | // literal or a cooked one. | |||
3809 | LookupResult R(*this, OpName, UDSuffixLoc, LookupOrdinaryName); | |||
3810 | switch (LookupLiteralOperator(UDLScope, R, CookedTy, | |||
3811 | /*AllowRaw*/ true, /*AllowTemplate*/ true, | |||
3812 | /*AllowStringTemplatePack*/ false, | |||
3813 | /*DiagnoseMissing*/ !Literal.isImaginary)) { | |||
3814 | case LOLR_ErrorNoDiagnostic: | |||
3815 | // Lookup failure for imaginary constants isn't fatal, there's still the | |||
3816 | // GNU extension producing _Complex types. | |||
3817 | break; | |||
3818 | case LOLR_Error: | |||
3819 | return ExprError(); | |||
3820 | case LOLR_Cooked: { | |||
3821 | Expr *Lit; | |||
3822 | if (Literal.isFloatingLiteral()) { | |||
3823 | Lit = BuildFloatingLiteral(*this, Literal, CookedTy, Tok.getLocation()); | |||
3824 | } else { | |||
3825 | llvm::APInt ResultVal(Context.getTargetInfo().getLongLongWidth(), 0); | |||
3826 | if (Literal.GetIntegerValue(ResultVal)) | |||
3827 | Diag(Tok.getLocation(), diag::err_integer_literal_too_large) | |||
3828 | << /* Unsigned */ 1; | |||
3829 | Lit = IntegerLiteral::Create(Context, ResultVal, CookedTy, | |||
3830 | Tok.getLocation()); | |||
3831 | } | |||
3832 | return BuildLiteralOperatorCall(R, OpNameInfo, Lit, TokLoc); | |||
3833 | } | |||
3834 | ||||
3835 | case LOLR_Raw: { | |||
3836 | // C++11 [lit.ext]p3, p4: If S contains a raw literal operator, the | |||
3837 | // literal is treated as a call of the form | |||
3838 | // operator "" X ("n") | |||
3839 | unsigned Length = Literal.getUDSuffixOffset(); | |||
3840 | QualType StrTy = Context.getConstantArrayType( | |||
3841 | Context.adjustStringLiteralBaseType(Context.CharTy.withConst()), | |||
3842 | llvm::APInt(32, Length + 1), nullptr, ArrayType::Normal, 0); | |||
3843 | Expr *Lit = | |||
3844 | StringLiteral::Create(Context, StringRef(TokSpelling.data(), Length), | |||
3845 | StringLiteral::Ordinary, | |||
3846 | /*Pascal*/ false, StrTy, &TokLoc, 1); | |||
3847 | return BuildLiteralOperatorCall(R, OpNameInfo, Lit, TokLoc); | |||
3848 | } | |||
3849 | ||||
3850 | case LOLR_Template: { | |||
3851 | // C++11 [lit.ext]p3, p4: Otherwise (S contains a literal operator | |||
3852 | // template), L is treated as a call fo the form | |||
3853 | // operator "" X <'c1', 'c2', ... 'ck'>() | |||
3854 | // where n is the source character sequence c1 c2 ... ck. | |||
3855 | TemplateArgumentListInfo ExplicitArgs; | |||
3856 | unsigned CharBits = Context.getIntWidth(Context.CharTy); | |||
3857 | bool CharIsUnsigned = Context.CharTy->isUnsignedIntegerType(); | |||
3858 | llvm::APSInt Value(CharBits, CharIsUnsigned); | |||
3859 | for (unsigned I = 0, N = Literal.getUDSuffixOffset(); I != N; ++I) { | |||
3860 | Value = TokSpelling[I]; | |||
3861 | TemplateArgument Arg(Context, Value, Context.CharTy); | |||
3862 | TemplateArgumentLocInfo ArgInfo; | |||
3863 | ExplicitArgs.addArgument(TemplateArgumentLoc(Arg, ArgInfo)); | |||
3864 | } | |||
3865 | return BuildLiteralOperatorCall(R, OpNameInfo, std::nullopt, TokLoc, | |||
3866 | &ExplicitArgs); | |||
3867 | } | |||
3868 | case LOLR_StringTemplatePack: | |||
3869 | llvm_unreachable("unexpected literal operator lookup result")::llvm::llvm_unreachable_internal("unexpected literal operator lookup result" , "clang/lib/Sema/SemaExpr.cpp", 3869); | |||
3870 | } | |||
3871 | } | |||
3872 | ||||
3873 | Expr *Res; | |||
3874 | ||||
3875 | if (Literal.isFixedPointLiteral()) { | |||
3876 | QualType Ty; | |||
3877 | ||||
3878 | if (Literal.isAccum) { | |||
3879 | if (Literal.isHalf) { | |||
3880 | Ty = Context.ShortAccumTy; | |||
3881 | } else if (Literal.isLong) { | |||
3882 | Ty = Context.LongAccumTy; | |||
3883 | } else { | |||
3884 | Ty = Context.AccumTy; | |||
3885 | } | |||
3886 | } else if (Literal.isFract) { | |||
3887 | if (Literal.isHalf) { | |||
3888 | Ty = Context.ShortFractTy; | |||
3889 | } else if (Literal.isLong) { | |||
3890 | Ty = Context.LongFractTy; | |||
3891 | } else { | |||
3892 | Ty = Context.FractTy; | |||
3893 | } | |||
3894 | } | |||
3895 | ||||
3896 | if (Literal.isUnsigned) Ty = Context.getCorrespondingUnsignedType(Ty); | |||
3897 | ||||
3898 | bool isSigned = !Literal.isUnsigned; | |||
3899 | unsigned scale = Context.getFixedPointScale(Ty); | |||
3900 | unsigned bit_width = Context.getTypeInfo(Ty).Width; | |||
3901 | ||||
3902 | llvm::APInt Val(bit_width, 0, isSigned); | |||
3903 | bool Overflowed = Literal.GetFixedPointValue(Val, scale); | |||
3904 | bool ValIsZero = Val.isZero() && !Overflowed; | |||
3905 | ||||
3906 | auto MaxVal = Context.getFixedPointMax(Ty).getValue(); | |||
3907 | if (Literal.isFract && Val == MaxVal + 1 && !ValIsZero) | |||
3908 | // Clause 6.4.4 - The value of a constant shall be in the range of | |||
3909 | // representable values for its type, with exception for constants of a | |||
3910 | // fract type with a value of exactly 1; such a constant shall denote | |||
3911 | // the maximal value for the type. | |||
3912 | --Val; | |||
3913 | else if (Val.ugt(MaxVal) || Overflowed) | |||
3914 | Diag(Tok.getLocation(), diag::err_too_large_for_fixed_point); | |||
3915 | ||||
3916 | Res = FixedPointLiteral::CreateFromRawInt(Context, Val, Ty, | |||
3917 | Tok.getLocation(), scale); | |||
3918 | } else if (Literal.isFloatingLiteral()) { | |||
3919 | QualType Ty; | |||
3920 | if (Literal.isHalf){ | |||
3921 | if (getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts())) | |||
3922 | Ty = Context.HalfTy; | |||
3923 | else { | |||
3924 | Diag(Tok.getLocation(), diag::err_half_const_requires_fp16); | |||
3925 | return ExprError(); | |||
3926 | } | |||
3927 | } else if (Literal.isFloat) | |||
3928 | Ty = Context.FloatTy; | |||
3929 | else if (Literal.isLong) | |||
3930 | Ty = Context.LongDoubleTy; | |||
3931 | else if (Literal.isFloat16) | |||
3932 | Ty = Context.Float16Ty; | |||
3933 | else if (Literal.isFloat128) | |||
3934 | Ty = Context.Float128Ty; | |||
3935 | else | |||
3936 | Ty = Context.DoubleTy; | |||
3937 | ||||
3938 | Res = BuildFloatingLiteral(*this, Literal, Ty, Tok.getLocation()); | |||
3939 | ||||
3940 | if (Ty == Context.DoubleTy) { | |||
3941 | if (getLangOpts().SinglePrecisionConstants) { | |||
3942 | if (Ty->castAs<BuiltinType>()->getKind() != BuiltinType::Float) { | |||
3943 | Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).get(); | |||
3944 | } | |||
3945 | } else if (getLangOpts().OpenCL && !getOpenCLOptions().isAvailableOption( | |||
3946 | "cl_khr_fp64", getLangOpts())) { | |||
3947 | // Impose single-precision float type when cl_khr_fp64 is not enabled. | |||
3948 | Diag(Tok.getLocation(), diag::warn_double_const_requires_fp64) | |||
3949 | << (getLangOpts().getOpenCLCompatibleVersion() >= 300); | |||
3950 | Res = ImpCastExprToType(Res, Context.FloatTy, CK_FloatingCast).get(); | |||
3951 | } | |||
3952 | } | |||
3953 | } else if (!Literal.isIntegerLiteral()) { | |||
3954 | return ExprError(); | |||
3955 | } else { | |||
3956 | QualType Ty; | |||
3957 | ||||
3958 | // 'z/uz' literals are a C++23 feature. | |||
3959 | if (Literal.isSizeT) | |||
3960 | Diag(Tok.getLocation(), getLangOpts().CPlusPlus | |||
3961 | ? getLangOpts().CPlusPlus23 | |||
3962 | ? diag::warn_cxx20_compat_size_t_suffix | |||
3963 | : diag::ext_cxx23_size_t_suffix | |||
3964 | : diag::err_cxx23_size_t_suffix); | |||
3965 | ||||
3966 | // 'wb/uwb' literals are a C2x feature. We support _BitInt as a type in C++, | |||
3967 | // but we do not currently support the suffix in C++ mode because it's not | |||
3968 | // entirely clear whether WG21 will prefer this suffix to return a library | |||
3969 | // type such as std::bit_int instead of returning a _BitInt. | |||
3970 | if (Literal.isBitInt && !getLangOpts().CPlusPlus) | |||
3971 | PP.Diag(Tok.getLocation(), getLangOpts().C2x | |||
3972 | ? diag::warn_c2x_compat_bitint_suffix | |||
3973 | : diag::ext_c2x_bitint_suffix); | |||
3974 | ||||
3975 | // Get the value in the widest-possible width. What is "widest" depends on | |||
3976 | // whether the literal is a bit-precise integer or not. For a bit-precise | |||
3977 | // integer type, try to scan the source to determine how many bits are | |||
3978 | // needed to represent the value. This may seem a bit expensive, but trying | |||
3979 | // to get the integer value from an overly-wide APInt is *extremely* | |||
3980 | // expensive, so the naive approach of assuming | |||
3981 | // llvm::IntegerType::MAX_INT_BITS is a big performance hit. | |||
3982 | unsigned BitsNeeded = | |||
3983 | Literal.isBitInt ? llvm::APInt::getSufficientBitsNeeded( | |||
3984 | Literal.getLiteralDigits(), Literal.getRadix()) | |||
3985 | : Context.getTargetInfo().getIntMaxTWidth(); | |||
3986 | llvm::APInt ResultVal(BitsNeeded, 0); | |||
3987 | ||||
3988 | if (Literal.GetIntegerValue(ResultVal)) { | |||
3989 | // If this value didn't fit into uintmax_t, error and force to ull. | |||
3990 | Diag(Tok.getLocation(), diag::err_integer_literal_too_large) | |||
3991 | << /* Unsigned */ 1; | |||
3992 | Ty = Context.UnsignedLongLongTy; | |||
3993 | 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?\"" , "clang/lib/Sema/SemaExpr.cpp", 3994, __extension__ __PRETTY_FUNCTION__ )) | |||
3994 | "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?\"" , "clang/lib/Sema/SemaExpr.cpp", 3994, __extension__ __PRETTY_FUNCTION__ )); | |||
3995 | } else { | |||
3996 | // If this value fits into a ULL, try to figure out what else it fits into | |||
3997 | // according to the rules of C99 6.4.4.1p5. | |||
3998 | ||||
3999 | // Octal, Hexadecimal, and integers with a U suffix are allowed to | |||
4000 | // be an unsigned int. | |||
4001 | bool AllowUnsigned = Literal.isUnsigned || Literal.getRadix() != 10; | |||
4002 | ||||
4003 | // Check from smallest to largest, picking the smallest type we can. | |||
4004 | unsigned Width = 0; | |||
4005 | ||||
4006 | // Microsoft specific integer suffixes are explicitly sized. | |||
4007 | if (Literal.MicrosoftInteger) { | |||
4008 | if (Literal.MicrosoftInteger == 8 && !Literal.isUnsigned) { | |||
4009 | Width = 8; | |||
4010 | Ty = Context.CharTy; | |||
4011 | } else { | |||
4012 | Width = Literal.MicrosoftInteger; | |||
4013 | Ty = Context.getIntTypeForBitwidth(Width, | |||
4014 | /*Signed=*/!Literal.isUnsigned); | |||
4015 | } | |||
4016 | } | |||
4017 | ||||
4018 | // Bit-precise integer literals are automagically-sized based on the | |||
4019 | // width required by the literal. | |||
4020 | if (Literal.isBitInt) { | |||
4021 | // The signed version has one more bit for the sign value. There are no | |||
4022 | // zero-width bit-precise integers, even if the literal value is 0. | |||
4023 | Width = std::max(ResultVal.getActiveBits(), 1u) + | |||
4024 | (Literal.isUnsigned ? 0u : 1u); | |||
4025 | ||||
4026 | // Diagnose if the width of the constant is larger than BITINT_MAXWIDTH, | |||
4027 | // and reset the type to the largest supported width. | |||
4028 | unsigned int MaxBitIntWidth = | |||
4029 | Context.getTargetInfo().getMaxBitIntWidth(); | |||
4030 | if (Width > MaxBitIntWidth) { | |||
4031 | Diag(Tok.getLocation(), diag::err_integer_literal_too_large) | |||
4032 | << Literal.isUnsigned; | |||
4033 | Width = MaxBitIntWidth; | |||
4034 | } | |||
4035 | ||||
4036 | // Reset the result value to the smaller APInt and select the correct | |||
4037 | // type to be used. Note, we zext even for signed values because the | |||
4038 | // literal itself is always an unsigned value (a preceeding - is a | |||
4039 | // unary operator, not part of the literal). | |||
4040 | ResultVal = ResultVal.zextOrTrunc(Width); | |||
4041 | Ty = Context.getBitIntType(Literal.isUnsigned, Width); | |||
4042 | } | |||
4043 | ||||
4044 | // Check C++23 size_t literals. | |||
4045 | if (Literal.isSizeT) { | |||
4046 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 4047, __extension__ __PRETTY_FUNCTION__ )) | |||
4047 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 4047, __extension__ __PRETTY_FUNCTION__ )); | |||
4048 | unsigned SizeTSize = Context.getTargetInfo().getTypeWidth( | |||
4049 | Context.getTargetInfo().getSizeType()); | |||
4050 | ||||
4051 | // Does it fit in size_t? | |||
4052 | if (ResultVal.isIntN(SizeTSize)) { | |||
4053 | // Does it fit in ssize_t? | |||
4054 | if (!Literal.isUnsigned && ResultVal[SizeTSize - 1] == 0) | |||
4055 | Ty = Context.getSignedSizeType(); | |||
4056 | else if (AllowUnsigned) | |||
4057 | Ty = Context.getSizeType(); | |||
4058 | Width = SizeTSize; | |||
4059 | } | |||
4060 | } | |||
4061 | ||||
4062 | if (Ty.isNull() && !Literal.isLong && !Literal.isLongLong && | |||
4063 | !Literal.isSizeT) { | |||
4064 | // Are int/unsigned possibilities? | |||
4065 | unsigned IntSize = Context.getTargetInfo().getIntWidth(); | |||
4066 | ||||
4067 | // Does it fit in a unsigned int? | |||
4068 | if (ResultVal.isIntN(IntSize)) { | |||
4069 | // Does it fit in a signed int? | |||
4070 | if (!Literal.isUnsigned && ResultVal[IntSize-1] == 0) | |||
4071 | Ty = Context.IntTy; | |||
4072 | else if (AllowUnsigned) | |||
4073 | Ty = Context.UnsignedIntTy; | |||
4074 | Width = IntSize; | |||
4075 | } | |||
4076 | } | |||
4077 | ||||
4078 | // Are long/unsigned long possibilities? | |||
4079 | if (Ty.isNull() && !Literal.isLongLong && !Literal.isSizeT) { | |||
4080 | unsigned LongSize = Context.getTargetInfo().getLongWidth(); | |||
4081 | ||||
4082 | // Does it fit in a unsigned long? | |||
4083 | if (ResultVal.isIntN(LongSize)) { | |||
4084 | // Does it fit in a signed long? | |||
4085 | if (!Literal.isUnsigned && ResultVal[LongSize-1] == 0) | |||
4086 | Ty = Context.LongTy; | |||
4087 | else if (AllowUnsigned) | |||
4088 | Ty = Context.UnsignedLongTy; | |||
4089 | // Check according to the rules of C90 6.1.3.2p5. C++03 [lex.icon]p2 | |||
4090 | // is compatible. | |||
4091 | else if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11) { | |||
4092 | const unsigned LongLongSize = | |||
4093 | Context.getTargetInfo().getLongLongWidth(); | |||
4094 | Diag(Tok.getLocation(), | |||
4095 | getLangOpts().CPlusPlus | |||
4096 | ? Literal.isLong | |||
4097 | ? diag::warn_old_implicitly_unsigned_long_cxx | |||
4098 | : /*C++98 UB*/ diag:: | |||
4099 | ext_old_implicitly_unsigned_long_cxx | |||
4100 | : diag::warn_old_implicitly_unsigned_long) | |||
4101 | << (LongLongSize > LongSize ? /*will have type 'long long'*/ 0 | |||
4102 | : /*will be ill-formed*/ 1); | |||
4103 | Ty = Context.UnsignedLongTy; | |||
4104 | } | |||
4105 | Width = LongSize; | |||
4106 | } | |||
4107 | } | |||
4108 | ||||
4109 | // Check long long if needed. | |||
4110 | if (Ty.isNull() && !Literal.isSizeT) { | |||
4111 | unsigned LongLongSize = Context.getTargetInfo().getLongLongWidth(); | |||
4112 | ||||
4113 | // Does it fit in a unsigned long long? | |||
4114 | if (ResultVal.isIntN(LongLongSize)) { | |||
4115 | // Does it fit in a signed long long? | |||
4116 | // To be compatible with MSVC, hex integer literals ending with the | |||
4117 | // LL or i64 suffix are always signed in Microsoft mode. | |||
4118 | if (!Literal.isUnsigned && (ResultVal[LongLongSize-1] == 0 || | |||
4119 | (getLangOpts().MSVCCompat && Literal.isLongLong))) | |||
4120 | Ty = Context.LongLongTy; | |||
4121 | else if (AllowUnsigned) | |||
4122 | Ty = Context.UnsignedLongLongTy; | |||
4123 | Width = LongLongSize; | |||
4124 | ||||
4125 | // 'long long' is a C99 or C++11 feature, whether the literal | |||
4126 | // explicitly specified 'long long' or we needed the extra width. | |||
4127 | if (getLangOpts().CPlusPlus) | |||
4128 | Diag(Tok.getLocation(), getLangOpts().CPlusPlus11 | |||
4129 | ? diag::warn_cxx98_compat_longlong | |||
4130 | : diag::ext_cxx11_longlong); | |||
4131 | else if (!getLangOpts().C99) | |||
4132 | Diag(Tok.getLocation(), diag::ext_c99_longlong); | |||
4133 | } | |||
4134 | } | |||
4135 | ||||
4136 | // If we still couldn't decide a type, we either have 'size_t' literal | |||
4137 | // that is out of range, or a decimal literal that does not fit in a | |||
4138 | // signed long long and has no U suffix. | |||
4139 | if (Ty.isNull()) { | |||
4140 | if (Literal.isSizeT) | |||
4141 | Diag(Tok.getLocation(), diag::err_size_t_literal_too_large) | |||
4142 | << Literal.isUnsigned; | |||
4143 | else | |||
4144 | Diag(Tok.getLocation(), | |||
4145 | diag::ext_integer_literal_too_large_for_signed); | |||
4146 | Ty = Context.UnsignedLongLongTy; | |||
4147 | Width = Context.getTargetInfo().getLongLongWidth(); | |||
4148 | } | |||
4149 | ||||
4150 | if (ResultVal.getBitWidth() != Width) | |||
4151 | ResultVal = ResultVal.trunc(Width); | |||
4152 | } | |||
4153 | Res = IntegerLiteral::Create(Context, ResultVal, Ty, Tok.getLocation()); | |||
4154 | } | |||
4155 | ||||
4156 | // If this is an imaginary literal, create the ImaginaryLiteral wrapper. | |||
4157 | if (Literal.isImaginary) { | |||
4158 | Res = new (Context) ImaginaryLiteral(Res, | |||
4159 | Context.getComplexType(Res->getType())); | |||
4160 | ||||
4161 | Diag(Tok.getLocation(), diag::ext_imaginary_constant); | |||
4162 | } | |||
4163 | return Res; | |||
4164 | } | |||
4165 | ||||
4166 | ExprResult Sema::ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E) { | |||
4167 | assert(E && "ActOnParenExpr() missing expr")(static_cast <bool> (E && "ActOnParenExpr() missing expr" ) ? void (0) : __assert_fail ("E && \"ActOnParenExpr() missing expr\"" , "clang/lib/Sema/SemaExpr.cpp", 4167, __extension__ __PRETTY_FUNCTION__ )); | |||
4168 | QualType ExprTy = E->getType(); | |||
4169 | if (getLangOpts().ProtectParens && CurFPFeatures.getAllowFPReassociate() && | |||
4170 | !E->isLValue() && ExprTy->hasFloatingRepresentation()) | |||
4171 | return BuildBuiltinCallExpr(R, Builtin::BI__arithmetic_fence, E); | |||
4172 | return new (Context) ParenExpr(L, R, E); | |||
4173 | } | |||
4174 | ||||
4175 | static bool CheckVecStepTraitOperandType(Sema &S, QualType T, | |||
4176 | SourceLocation Loc, | |||
4177 | SourceRange ArgRange) { | |||
4178 | // [OpenCL 1.1 6.11.12] "The vec_step built-in function takes a built-in | |||
4179 | // scalar or vector data type argument..." | |||
4180 | // Every built-in scalar type (OpenCL 1.1 6.1.1) is either an arithmetic | |||
4181 | // type (C99 6.2.5p18) or void. | |||
4182 | if (!(T->isArithmeticType() || T->isVoidType() || T->isVectorType())) { | |||
4183 | S.Diag(Loc, diag::err_vecstep_non_scalar_vector_type) | |||
4184 | << T << ArgRange; | |||
4185 | return true; | |||
4186 | } | |||
4187 | ||||
4188 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 4189, __extension__ __PRETTY_FUNCTION__ )) | |||
4189 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 4189, __extension__ __PRETTY_FUNCTION__ )); | |||
4190 | return false; | |||
4191 | } | |||
4192 | ||||
4193 | static bool CheckExtensionTraitOperandType(Sema &S, QualType T, | |||
4194 | SourceLocation Loc, | |||
4195 | SourceRange ArgRange, | |||
4196 | UnaryExprOrTypeTrait TraitKind) { | |||
4197 | // Invalid types must be hard errors for SFINAE in C++. | |||
4198 | if (S.LangOpts.CPlusPlus) | |||
4199 | return true; | |||
4200 | ||||
4201 | // C99 6.5.3.4p1: | |||
4202 | if (T->isFunctionType() && | |||
4203 | (TraitKind == UETT_SizeOf || TraitKind == UETT_AlignOf || | |||
4204 | TraitKind == UETT_PreferredAlignOf)) { | |||
4205 | // sizeof(function)/alignof(function) is allowed as an extension. | |||
4206 | S.Diag(Loc, diag::ext_sizeof_alignof_function_type) | |||
4207 | << getTraitSpelling(TraitKind) << ArgRange; | |||
4208 | return false; | |||
4209 | } | |||
4210 | ||||
4211 | // Allow sizeof(void)/alignof(void) as an extension, unless in OpenCL where | |||
4212 | // this is an error (OpenCL v1.1 s6.3.k) | |||
4213 | if (T->isVoidType()) { | |||
4214 | unsigned DiagID = S.LangOpts.OpenCL ? diag::err_opencl_sizeof_alignof_type | |||
4215 | : diag::ext_sizeof_alignof_void_type; | |||
4216 | S.Diag(Loc, DiagID) << getTraitSpelling(TraitKind) << ArgRange; | |||
4217 | return false; | |||
4218 | } | |||
4219 | ||||
4220 | return true; | |||
4221 | } | |||
4222 | ||||
4223 | static bool CheckObjCTraitOperandConstraints(Sema &S, QualType T, | |||
4224 | SourceLocation Loc, | |||
4225 | SourceRange ArgRange, | |||
4226 | UnaryExprOrTypeTrait TraitKind) { | |||
4227 | // Reject sizeof(interface) and sizeof(interface<proto>) if the | |||
4228 | // runtime doesn't allow it. | |||
4229 | if (!S.LangOpts.ObjCRuntime.allowsSizeofAlignof() && T->isObjCObjectType()) { | |||
4230 | S.Diag(Loc, diag::err_sizeof_nonfragile_interface) | |||
4231 | << T << (TraitKind == UETT_SizeOf) | |||
4232 | << ArgRange; | |||
4233 | return true; | |||
4234 | } | |||
4235 | ||||
4236 | return false; | |||
4237 | } | |||
4238 | ||||
4239 | /// Check whether E is a pointer from a decayed array type (the decayed | |||
4240 | /// pointer type is equal to T) and emit a warning if it is. | |||
4241 | static void warnOnSizeofOnArrayDecay(Sema &S, SourceLocation Loc, QualType T, | |||
4242 | const Expr *E) { | |||
4243 | // Don't warn if the operation changed the type. | |||
4244 | if (T != E->getType()) | |||
4245 | return; | |||
4246 | ||||
4247 | // Now look for array decays. | |||
4248 | const auto *ICE = dyn_cast<ImplicitCastExpr>(E); | |||
4249 | if (!ICE || ICE->getCastKind() != CK_ArrayToPointerDecay) | |||
4250 | return; | |||
4251 | ||||
4252 | S.Diag(Loc, diag::warn_sizeof_array_decay) << ICE->getSourceRange() | |||
4253 | << ICE->getType() | |||
4254 | << ICE->getSubExpr()->getType(); | |||
4255 | } | |||
4256 | ||||
4257 | /// Check the constraints on expression operands to unary type expression | |||
4258 | /// and type traits. | |||
4259 | /// | |||
4260 | /// Completes any types necessary and validates the constraints on the operand | |||
4261 | /// expression. The logic mostly mirrors the type-based overload, but may modify | |||
4262 | /// the expression as it completes the type for that expression through template | |||
4263 | /// instantiation, etc. | |||
4264 | bool Sema::CheckUnaryExprOrTypeTraitOperand(Expr *E, | |||
4265 | UnaryExprOrTypeTrait ExprKind) { | |||
4266 | QualType ExprTy = E->getType(); | |||
4267 | assert(!ExprTy->isReferenceType())(static_cast <bool> (!ExprTy->isReferenceType()) ? void (0) : __assert_fail ("!ExprTy->isReferenceType()", "clang/lib/Sema/SemaExpr.cpp" , 4267, __extension__ __PRETTY_FUNCTION__)); | |||
4268 | ||||
4269 | bool IsUnevaluatedOperand = | |||
4270 | (ExprKind == UETT_SizeOf || ExprKind == UETT_AlignOf || | |||
4271 | ExprKind == UETT_PreferredAlignOf || ExprKind == UETT_VecStep); | |||
4272 | if (IsUnevaluatedOperand) { | |||
4273 | ExprResult Result = CheckUnevaluatedOperand(E); | |||
4274 | if (Result.isInvalid()) | |||
4275 | return true; | |||
4276 | E = Result.get(); | |||
4277 | } | |||
4278 | ||||
4279 | // The operand for sizeof and alignof is in an unevaluated expression context, | |||
4280 | // so side effects could result in unintended consequences. | |||
4281 | // Exclude instantiation-dependent expressions, because 'sizeof' is sometimes | |||
4282 | // used to build SFINAE gadgets. | |||
4283 | // FIXME: Should we consider instantiation-dependent operands to 'alignof'? | |||
4284 | if (IsUnevaluatedOperand && !inTemplateInstantiation() && | |||
4285 | !E->isInstantiationDependent() && | |||
4286 | !E->getType()->isVariableArrayType() && | |||
4287 | E->HasSideEffects(Context, false)) | |||
4288 | Diag(E->getExprLoc(), diag::warn_side_effects_unevaluated_context); | |||
4289 | ||||
4290 | if (ExprKind == UETT_VecStep) | |||
4291 | return CheckVecStepTraitOperandType(*this, ExprTy, E->getExprLoc(), | |||
4292 | E->getSourceRange()); | |||
4293 | ||||
4294 | // Explicitly list some types as extensions. | |||
4295 | if (!CheckExtensionTraitOperandType(*this, ExprTy, E->getExprLoc(), | |||
4296 | E->getSourceRange(), ExprKind)) | |||
4297 | return false; | |||
4298 | ||||
4299 | // 'alignof' applied to an expression only requires the base element type of | |||
4300 | // the expression to be complete. 'sizeof' requires the expression's type to | |||
4301 | // be complete (and will attempt to complete it if it's an array of unknown | |||
4302 | // bound). | |||
4303 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
4304 | if (RequireCompleteSizedType( | |||
4305 | E->getExprLoc(), Context.getBaseElementType(E->getType()), | |||
4306 | diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4307 | getTraitSpelling(ExprKind), E->getSourceRange())) | |||
4308 | return true; | |||
4309 | } else { | |||
4310 | if (RequireCompleteSizedExprType( | |||
4311 | E, diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4312 | getTraitSpelling(ExprKind), E->getSourceRange())) | |||
4313 | return true; | |||
4314 | } | |||
4315 | ||||
4316 | // Completing the expression's type may have changed it. | |||
4317 | ExprTy = E->getType(); | |||
4318 | assert(!ExprTy->isReferenceType())(static_cast <bool> (!ExprTy->isReferenceType()) ? void (0) : __assert_fail ("!ExprTy->isReferenceType()", "clang/lib/Sema/SemaExpr.cpp" , 4318, __extension__ __PRETTY_FUNCTION__)); | |||
4319 | ||||
4320 | if (ExprTy->isFunctionType()) { | |||
4321 | Diag(E->getExprLoc(), diag::err_sizeof_alignof_function_type) | |||
4322 | << getTraitSpelling(ExprKind) << E->getSourceRange(); | |||
4323 | return true; | |||
4324 | } | |||
4325 | ||||
4326 | if (CheckObjCTraitOperandConstraints(*this, ExprTy, E->getExprLoc(), | |||
4327 | E->getSourceRange(), ExprKind)) | |||
4328 | return true; | |||
4329 | ||||
4330 | if (ExprKind == UETT_SizeOf) { | |||
4331 | if (const auto *DeclRef = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { | |||
4332 | if (const auto *PVD = dyn_cast<ParmVarDecl>(DeclRef->getFoundDecl())) { | |||
4333 | QualType OType = PVD->getOriginalType(); | |||
4334 | QualType Type = PVD->getType(); | |||
4335 | if (Type->isPointerType() && OType->isArrayType()) { | |||
4336 | Diag(E->getExprLoc(), diag::warn_sizeof_array_param) | |||
4337 | << Type << OType; | |||
4338 | Diag(PVD->getLocation(), diag::note_declared_at); | |||
4339 | } | |||
4340 | } | |||
4341 | } | |||
4342 | ||||
4343 | // Warn on "sizeof(array op x)" and "sizeof(x op array)", where the array | |||
4344 | // decays into a pointer and returns an unintended result. This is most | |||
4345 | // likely a typo for "sizeof(array) op x". | |||
4346 | if (const auto *BO = dyn_cast<BinaryOperator>(E->IgnoreParens())) { | |||
4347 | warnOnSizeofOnArrayDecay(*this, BO->getOperatorLoc(), BO->getType(), | |||
4348 | BO->getLHS()); | |||
4349 | warnOnSizeofOnArrayDecay(*this, BO->getOperatorLoc(), BO->getType(), | |||
4350 | BO->getRHS()); | |||
4351 | } | |||
4352 | } | |||
4353 | ||||
4354 | return false; | |||
4355 | } | |||
4356 | ||||
4357 | /// Check the constraints on operands to unary expression and type | |||
4358 | /// traits. | |||
4359 | /// | |||
4360 | /// This will complete any types necessary, and validate the various constraints | |||
4361 | /// on those operands. | |||
4362 | /// | |||
4363 | /// The UsualUnaryConversions() function is *not* called by this routine. | |||
4364 | /// C99 6.3.2.1p[2-4] all state: | |||
4365 | /// Except when it is the operand of the sizeof operator ... | |||
4366 | /// | |||
4367 | /// C++ [expr.sizeof]p4 | |||
4368 | /// The lvalue-to-rvalue, array-to-pointer, and function-to-pointer | |||
4369 | /// standard conversions are not applied to the operand of sizeof. | |||
4370 | /// | |||
4371 | /// This policy is followed for all of the unary trait expressions. | |||
4372 | bool Sema::CheckUnaryExprOrTypeTraitOperand(QualType ExprType, | |||
4373 | SourceLocation OpLoc, | |||
4374 | SourceRange ExprRange, | |||
4375 | UnaryExprOrTypeTrait ExprKind) { | |||
4376 | if (ExprType->isDependentType()) | |||
4377 | return false; | |||
4378 | ||||
4379 | // C++ [expr.sizeof]p2: | |||
4380 | // When applied to a reference or a reference type, the result | |||
4381 | // is the size of the referenced type. | |||
4382 | // C++11 [expr.alignof]p3: | |||
4383 | // When alignof is applied to a reference type, the result | |||
4384 | // shall be the alignment of the referenced type. | |||
4385 | if (const ReferenceType *Ref = ExprType->getAs<ReferenceType>()) | |||
4386 | ExprType = Ref->getPointeeType(); | |||
4387 | ||||
4388 | // C11 6.5.3.4/3, C++11 [expr.alignof]p3: | |||
4389 | // When alignof or _Alignof is applied to an array type, the result | |||
4390 | // is the alignment of the element type. | |||
4391 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf || | |||
4392 | ExprKind == UETT_OpenMPRequiredSimdAlign) | |||
4393 | ExprType = Context.getBaseElementType(ExprType); | |||
4394 | ||||
4395 | if (ExprKind == UETT_VecStep) | |||
4396 | return CheckVecStepTraitOperandType(*this, ExprType, OpLoc, ExprRange); | |||
4397 | ||||
4398 | // Explicitly list some types as extensions. | |||
4399 | if (!CheckExtensionTraitOperandType(*this, ExprType, OpLoc, ExprRange, | |||
4400 | ExprKind)) | |||
4401 | return false; | |||
4402 | ||||
4403 | if (RequireCompleteSizedType( | |||
4404 | OpLoc, ExprType, diag::err_sizeof_alignof_incomplete_or_sizeless_type, | |||
4405 | getTraitSpelling(ExprKind), ExprRange)) | |||
4406 | return true; | |||
4407 | ||||
4408 | if (ExprType->isFunctionType()) { | |||
4409 | Diag(OpLoc, diag::err_sizeof_alignof_function_type) | |||
4410 | << getTraitSpelling(ExprKind) << ExprRange; | |||
4411 | return true; | |||
4412 | } | |||
4413 | ||||
4414 | if (CheckObjCTraitOperandConstraints(*this, ExprType, OpLoc, ExprRange, | |||
4415 | ExprKind)) | |||
4416 | return true; | |||
4417 | ||||
4418 | return false; | |||
4419 | } | |||
4420 | ||||
4421 | static bool CheckAlignOfExpr(Sema &S, Expr *E, UnaryExprOrTypeTrait ExprKind) { | |||
4422 | // Cannot know anything else if the expression is dependent. | |||
4423 | if (E->isTypeDependent()) | |||
4424 | return false; | |||
4425 | ||||
4426 | if (E->getObjectKind() == OK_BitField) { | |||
4427 | S.Diag(E->getExprLoc(), diag::err_sizeof_alignof_typeof_bitfield) | |||
4428 | << 1 << E->getSourceRange(); | |||
4429 | return true; | |||
4430 | } | |||
4431 | ||||
4432 | ValueDecl *D = nullptr; | |||
4433 | Expr *Inner = E->IgnoreParens(); | |||
4434 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Inner)) { | |||
4435 | D = DRE->getDecl(); | |||
4436 | } else if (MemberExpr *ME = dyn_cast<MemberExpr>(Inner)) { | |||
4437 | D = ME->getMemberDecl(); | |||
4438 | } | |||
4439 | ||||
4440 | // If it's a field, require the containing struct to have a | |||
4441 | // complete definition so that we can compute the layout. | |||
4442 | // | |||
4443 | // This can happen in C++11 onwards, either by naming the member | |||
4444 | // in a way that is not transformed into a member access expression | |||
4445 | // (in an unevaluated operand, for instance), or by naming the member | |||
4446 | // in a trailing-return-type. | |||
4447 | // | |||
4448 | // For the record, since __alignof__ on expressions is a GCC | |||
4449 | // extension, GCC seems to permit this but always gives the | |||
4450 | // nonsensical answer 0. | |||
4451 | // | |||
4452 | // We don't really need the layout here --- we could instead just | |||
4453 | // directly check for all the appropriate alignment-lowing | |||
4454 | // attributes --- but that would require duplicating a lot of | |||
4455 | // logic that just isn't worth duplicating for such a marginal | |||
4456 | // use-case. | |||
4457 | if (FieldDecl *FD = dyn_cast_or_null<FieldDecl>(D)) { | |||
4458 | // Fast path this check, since we at least know the record has a | |||
4459 | // definition if we can find a member of it. | |||
4460 | if (!FD->getParent()->isCompleteDefinition()) { | |||
4461 | S.Diag(E->getExprLoc(), diag::err_alignof_member_of_incomplete_type) | |||
4462 | << E->getSourceRange(); | |||
4463 | return true; | |||
4464 | } | |||
4465 | ||||
4466 | // Otherwise, if it's a field, and the field doesn't have | |||
4467 | // reference type, then it must have a complete type (or be a | |||
4468 | // flexible array member, which we explicitly want to | |||
4469 | // white-list anyway), which makes the following checks trivial. | |||
4470 | if (!FD->getType()->isReferenceType()) | |||
4471 | return false; | |||
4472 | } | |||
4473 | ||||
4474 | return S.CheckUnaryExprOrTypeTraitOperand(E, ExprKind); | |||
4475 | } | |||
4476 | ||||
4477 | bool Sema::CheckVecStepExpr(Expr *E) { | |||
4478 | E = E->IgnoreParens(); | |||
4479 | ||||
4480 | // Cannot know anything else if the expression is dependent. | |||
4481 | if (E->isTypeDependent()) | |||
4482 | return false; | |||
4483 | ||||
4484 | return CheckUnaryExprOrTypeTraitOperand(E, UETT_VecStep); | |||
4485 | } | |||
4486 | ||||
4487 | static void captureVariablyModifiedType(ASTContext &Context, QualType T, | |||
4488 | CapturingScopeInfo *CSI) { | |||
4489 | assert(T->isVariablyModifiedType())(static_cast <bool> (T->isVariablyModifiedType()) ? void (0) : __assert_fail ("T->isVariablyModifiedType()", "clang/lib/Sema/SemaExpr.cpp" , 4489, __extension__ __PRETTY_FUNCTION__)); | |||
4490 | assert(CSI != nullptr)(static_cast <bool> (CSI != nullptr) ? void (0) : __assert_fail ("CSI != nullptr", "clang/lib/Sema/SemaExpr.cpp", 4490, __extension__ __PRETTY_FUNCTION__)); | |||
4491 | ||||
4492 | // We're going to walk down into the type and look for VLA expressions. | |||
4493 | do { | |||
4494 | const Type *Ty = T.getTypePtr(); | |||
4495 | switch (Ty->getTypeClass()) { | |||
4496 | #define TYPE(Class, Base) | |||
4497 | #define ABSTRACT_TYPE(Class, Base) | |||
4498 | #define NON_CANONICAL_TYPE(Class, Base) | |||
4499 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: | |||
4500 | #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) | |||
4501 | #include "clang/AST/TypeNodes.inc" | |||
4502 | T = QualType(); | |||
4503 | break; | |||
4504 | // These types are never variably-modified. | |||
4505 | case Type::Builtin: | |||
4506 | case Type::Complex: | |||
4507 | case Type::Vector: | |||
4508 | case Type::ExtVector: | |||
4509 | case Type::ConstantMatrix: | |||
4510 | case Type::Record: | |||
4511 | case Type::Enum: | |||
4512 | case Type::TemplateSpecialization: | |||
4513 | case Type::ObjCObject: | |||
4514 | case Type::ObjCInterface: | |||
4515 | case Type::ObjCObjectPointer: | |||
4516 | case Type::ObjCTypeParam: | |||
4517 | case Type::Pipe: | |||
4518 | case Type::BitInt: | |||
4519 | llvm_unreachable("type class is never variably-modified!")::llvm::llvm_unreachable_internal("type class is never variably-modified!" , "clang/lib/Sema/SemaExpr.cpp", 4519); | |||
4520 | case Type::Elaborated: | |||
4521 | T = cast<ElaboratedType>(Ty)->getNamedType(); | |||
4522 | break; | |||
4523 | case Type::Adjusted: | |||
4524 | T = cast<AdjustedType>(Ty)->getOriginalType(); | |||
4525 | break; | |||
4526 | case Type::Decayed: | |||
4527 | T = cast<DecayedType>(Ty)->getPointeeType(); | |||
4528 | break; | |||
4529 | case Type::Pointer: | |||
4530 | T = cast<PointerType>(Ty)->getPointeeType(); | |||
4531 | break; | |||
4532 | case Type::BlockPointer: | |||
4533 | T = cast<BlockPointerType>(Ty)->getPointeeType(); | |||
4534 | break; | |||
4535 | case Type::LValueReference: | |||
4536 | case Type::RValueReference: | |||
4537 | T = cast<ReferenceType>(Ty)->getPointeeType(); | |||
4538 | break; | |||
4539 | case Type::MemberPointer: | |||
4540 | T = cast<MemberPointerType>(Ty)->getPointeeType(); | |||
4541 | break; | |||
4542 | case Type::ConstantArray: | |||
4543 | case Type::IncompleteArray: | |||
4544 | // Losing element qualification here is fine. | |||
4545 | T = cast<ArrayType>(Ty)->getElementType(); | |||
4546 | break; | |||
4547 | case Type::VariableArray: { | |||
4548 | // Losing element qualification here is fine. | |||
4549 | const VariableArrayType *VAT = cast<VariableArrayType>(Ty); | |||
4550 | ||||
4551 | // Unknown size indication requires no size computation. | |||
4552 | // Otherwise, evaluate and record it. | |||
4553 | auto Size = VAT->getSizeExpr(); | |||
4554 | if (Size && !CSI->isVLATypeCaptured(VAT) && | |||
4555 | (isa<CapturedRegionScopeInfo>(CSI) || isa<LambdaScopeInfo>(CSI))) | |||
4556 | CSI->addVLATypeCapture(Size->getExprLoc(), VAT, Context.getSizeType()); | |||
4557 | ||||
4558 | T = VAT->getElementType(); | |||
4559 | break; | |||
4560 | } | |||
4561 | case Type::FunctionProto: | |||
4562 | case Type::FunctionNoProto: | |||
4563 | T = cast<FunctionType>(Ty)->getReturnType(); | |||
4564 | break; | |||
4565 | case Type::Paren: | |||
4566 | case Type::TypeOf: | |||
4567 | case Type::UnaryTransform: | |||
4568 | case Type::Attributed: | |||
4569 | case Type::BTFTagAttributed: | |||
4570 | case Type::SubstTemplateTypeParm: | |||
4571 | case Type::MacroQualified: | |||
4572 | // Keep walking after single level desugaring. | |||
4573 | T = T.getSingleStepDesugaredType(Context); | |||
4574 | break; | |||
4575 | case Type::Typedef: | |||
4576 | T = cast<TypedefType>(Ty)->desugar(); | |||
4577 | break; | |||
4578 | case Type::Decltype: | |||
4579 | T = cast<DecltypeType>(Ty)->desugar(); | |||
4580 | break; | |||
4581 | case Type::Using: | |||
4582 | T = cast<UsingType>(Ty)->desugar(); | |||
4583 | break; | |||
4584 | case Type::Auto: | |||
4585 | case Type::DeducedTemplateSpecialization: | |||
4586 | T = cast<DeducedType>(Ty)->getDeducedType(); | |||
4587 | break; | |||
4588 | case Type::TypeOfExpr: | |||
4589 | T = cast<TypeOfExprType>(Ty)->getUnderlyingExpr()->getType(); | |||
4590 | break; | |||
4591 | case Type::Atomic: | |||
4592 | T = cast<AtomicType>(Ty)->getValueType(); | |||
4593 | break; | |||
4594 | } | |||
4595 | } while (!T.isNull() && T->isVariablyModifiedType()); | |||
4596 | } | |||
4597 | ||||
4598 | /// Build a sizeof or alignof expression given a type operand. | |||
4599 | ExprResult | |||
4600 | Sema::CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, | |||
4601 | SourceLocation OpLoc, | |||
4602 | UnaryExprOrTypeTrait ExprKind, | |||
4603 | SourceRange R) { | |||
4604 | if (!TInfo) | |||
4605 | return ExprError(); | |||
4606 | ||||
4607 | QualType T = TInfo->getType(); | |||
4608 | ||||
4609 | if (!T->isDependentType() && | |||
4610 | CheckUnaryExprOrTypeTraitOperand(T, OpLoc, R, ExprKind)) | |||
4611 | return ExprError(); | |||
4612 | ||||
4613 | if (T->isVariablyModifiedType() && FunctionScopes.size() > 1) { | |||
4614 | if (auto *TT = T->getAs<TypedefType>()) { | |||
4615 | for (auto I = FunctionScopes.rbegin(), | |||
4616 | E = std::prev(FunctionScopes.rend()); | |||
4617 | I != E; ++I) { | |||
4618 | auto *CSI = dyn_cast<CapturingScopeInfo>(*I); | |||
4619 | if (CSI == nullptr) | |||
4620 | break; | |||
4621 | DeclContext *DC = nullptr; | |||
4622 | if (auto *LSI = dyn_cast<LambdaScopeInfo>(CSI)) | |||
4623 | DC = LSI->CallOperator; | |||
4624 | else if (auto *CRSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) | |||
4625 | DC = CRSI->TheCapturedDecl; | |||
4626 | else if (auto *BSI = dyn_cast<BlockScopeInfo>(CSI)) | |||
4627 | DC = BSI->TheDecl; | |||
4628 | if (DC) { | |||
4629 | if (DC->containsDecl(TT->getDecl())) | |||
4630 | break; | |||
4631 | captureVariablyModifiedType(Context, T, CSI); | |||
4632 | } | |||
4633 | } | |||
4634 | } | |||
4635 | } | |||
4636 | ||||
4637 | // C99 6.5.3.4p4: the type (an unsigned integer type) is size_t. | |||
4638 | if (isUnevaluatedContext() && ExprKind == UETT_SizeOf && | |||
4639 | TInfo->getType()->isVariablyModifiedType()) | |||
4640 | TInfo = TransformToPotentiallyEvaluated(TInfo); | |||
4641 | ||||
4642 | return new (Context) UnaryExprOrTypeTraitExpr( | |||
4643 | ExprKind, TInfo, Context.getSizeType(), OpLoc, R.getEnd()); | |||
4644 | } | |||
4645 | ||||
4646 | /// Build a sizeof or alignof expression given an expression | |||
4647 | /// operand. | |||
4648 | ExprResult | |||
4649 | Sema::CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, | |||
4650 | UnaryExprOrTypeTrait ExprKind) { | |||
4651 | ExprResult PE = CheckPlaceholderExpr(E); | |||
4652 | if (PE.isInvalid()) | |||
4653 | return ExprError(); | |||
4654 | ||||
4655 | E = PE.get(); | |||
4656 | ||||
4657 | // Verify that the operand is valid. | |||
4658 | bool isInvalid = false; | |||
4659 | if (E->isTypeDependent()) { | |||
4660 | // Delay type-checking for type-dependent expressions. | |||
4661 | } else if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
4662 | isInvalid = CheckAlignOfExpr(*this, E, ExprKind); | |||
4663 | } else if (ExprKind == UETT_VecStep) { | |||
4664 | isInvalid = CheckVecStepExpr(E); | |||
4665 | } else if (ExprKind == UETT_OpenMPRequiredSimdAlign) { | |||
4666 | Diag(E->getExprLoc(), diag::err_openmp_default_simd_align_expr); | |||
4667 | isInvalid = true; | |||
4668 | } else if (E->refersToBitField()) { // C99 6.5.3.4p1. | |||
4669 | Diag(E->getExprLoc(), diag::err_sizeof_alignof_typeof_bitfield) << 0; | |||
4670 | isInvalid = true; | |||
4671 | } else { | |||
4672 | isInvalid = CheckUnaryExprOrTypeTraitOperand(E, UETT_SizeOf); | |||
4673 | } | |||
4674 | ||||
4675 | if (isInvalid) | |||
4676 | return ExprError(); | |||
4677 | ||||
4678 | if (ExprKind == UETT_SizeOf && E->getType()->isVariableArrayType()) { | |||
4679 | PE = TransformToPotentiallyEvaluated(E); | |||
4680 | if (PE.isInvalid()) return ExprError(); | |||
4681 | E = PE.get(); | |||
4682 | } | |||
4683 | ||||
4684 | // C99 6.5.3.4p4: the type (an unsigned integer type) is size_t. | |||
4685 | return new (Context) UnaryExprOrTypeTraitExpr( | |||
4686 | ExprKind, E, Context.getSizeType(), OpLoc, E->getSourceRange().getEnd()); | |||
4687 | } | |||
4688 | ||||
4689 | /// ActOnUnaryExprOrTypeTraitExpr - Handle @c sizeof(type) and @c sizeof @c | |||
4690 | /// expr and the same for @c alignof and @c __alignof | |||
4691 | /// Note that the ArgRange is invalid if isType is false. | |||
4692 | ExprResult | |||
4693 | Sema::ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, | |||
4694 | UnaryExprOrTypeTrait ExprKind, bool IsType, | |||
4695 | void *TyOrEx, SourceRange ArgRange) { | |||
4696 | // If error parsing type, ignore. | |||
4697 | if (!TyOrEx) return ExprError(); | |||
4698 | ||||
4699 | if (IsType) { | |||
4700 | TypeSourceInfo *TInfo; | |||
4701 | (void) GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrEx), &TInfo); | |||
4702 | return CreateUnaryExprOrTypeTraitExpr(TInfo, OpLoc, ExprKind, ArgRange); | |||
4703 | } | |||
4704 | ||||
4705 | Expr *ArgEx = (Expr *)TyOrEx; | |||
4706 | ExprResult Result = CreateUnaryExprOrTypeTraitExpr(ArgEx, OpLoc, ExprKind); | |||
4707 | return Result; | |||
4708 | } | |||
4709 | ||||
4710 | static QualType CheckRealImagOperand(Sema &S, ExprResult &V, SourceLocation Loc, | |||
4711 | bool IsReal) { | |||
4712 | if (V.get()->isTypeDependent()) | |||
4713 | return S.Context.DependentTy; | |||
4714 | ||||
4715 | // _Real and _Imag are only l-values for normal l-values. | |||
4716 | if (V.get()->getObjectKind() != OK_Ordinary) { | |||
4717 | V = S.DefaultLvalueConversion(V.get()); | |||
4718 | if (V.isInvalid()) | |||
4719 | return QualType(); | |||
4720 | } | |||
4721 | ||||
4722 | // These operators return the element type of a complex type. | |||
4723 | if (const ComplexType *CT = V.get()->getType()->getAs<ComplexType>()) | |||
4724 | return CT->getElementType(); | |||
4725 | ||||
4726 | // Otherwise they pass through real integer and floating point types here. | |||
4727 | if (V.get()->getType()->isArithmeticType()) | |||
4728 | return V.get()->getType(); | |||
4729 | ||||
4730 | // Test for placeholders. | |||
4731 | ExprResult PR = S.CheckPlaceholderExpr(V.get()); | |||
4732 | if (PR.isInvalid()) return QualType(); | |||
4733 | if (PR.get() != V.get()) { | |||
4734 | V = PR; | |||
4735 | return CheckRealImagOperand(S, V, Loc, IsReal); | |||
4736 | } | |||
4737 | ||||
4738 | // Reject anything else. | |||
4739 | S.Diag(Loc, diag::err_realimag_invalid_type) << V.get()->getType() | |||
4740 | << (IsReal ? "__real" : "__imag"); | |||
4741 | return QualType(); | |||
4742 | } | |||
4743 | ||||
4744 | ||||
4745 | ||||
4746 | ExprResult | |||
4747 | Sema::ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, | |||
4748 | tok::TokenKind Kind, Expr *Input) { | |||
4749 | UnaryOperatorKind Opc; | |||
4750 | switch (Kind) { | |||
4751 | default: llvm_unreachable("Unknown unary op!")::llvm::llvm_unreachable_internal("Unknown unary op!", "clang/lib/Sema/SemaExpr.cpp" , 4751); | |||
4752 | case tok::plusplus: Opc = UO_PostInc; break; | |||
4753 | case tok::minusminus: Opc = UO_PostDec; break; | |||
4754 | } | |||
4755 | ||||
4756 | // Since this might is a postfix expression, get rid of ParenListExprs. | |||
4757 | ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Input); | |||
4758 | if (Result.isInvalid()) return ExprError(); | |||
4759 | Input = Result.get(); | |||
4760 | ||||
4761 | return BuildUnaryOp(S, OpLoc, Opc, Input); | |||
4762 | } | |||
4763 | ||||
4764 | /// Diagnose if arithmetic on the given ObjC pointer is illegal. | |||
4765 | /// | |||
4766 | /// \return true on error | |||
4767 | static bool checkArithmeticOnObjCPointer(Sema &S, | |||
4768 | SourceLocation opLoc, | |||
4769 | Expr *op) { | |||
4770 | assert(op->getType()->isObjCObjectPointerType())(static_cast <bool> (op->getType()->isObjCObjectPointerType ()) ? void (0) : __assert_fail ("op->getType()->isObjCObjectPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 4770, __extension__ __PRETTY_FUNCTION__ )); | |||
4771 | if (S.LangOpts.ObjCRuntime.allowsPointerArithmetic() && | |||
4772 | !S.LangOpts.ObjCSubscriptingLegacyRuntime) | |||
4773 | return false; | |||
4774 | ||||
4775 | S.Diag(opLoc, diag::err_arithmetic_nonfragile_interface) | |||
4776 | << op->getType()->castAs<ObjCObjectPointerType>()->getPointeeType() | |||
4777 | << op->getSourceRange(); | |||
4778 | return true; | |||
4779 | } | |||
4780 | ||||
4781 | static bool isMSPropertySubscriptExpr(Sema &S, Expr *Base) { | |||
4782 | auto *BaseNoParens = Base->IgnoreParens(); | |||
4783 | if (auto *MSProp = dyn_cast<MSPropertyRefExpr>(BaseNoParens)) | |||
4784 | return MSProp->getPropertyDecl()->getType()->isArrayType(); | |||
4785 | return isa<MSPropertySubscriptExpr>(BaseNoParens); | |||
4786 | } | |||
4787 | ||||
4788 | // Returns the type used for LHS[RHS], given one of LHS, RHS is type-dependent. | |||
4789 | // Typically this is DependentTy, but can sometimes be more precise. | |||
4790 | // | |||
4791 | // There are cases when we could determine a non-dependent type: | |||
4792 | // - LHS and RHS may have non-dependent types despite being type-dependent | |||
4793 | // (e.g. unbounded array static members of the current instantiation) | |||
4794 | // - one may be a dependent-sized array with known element type | |||
4795 | // - one may be a dependent-typed valid index (enum in current instantiation) | |||
4796 | // | |||
4797 | // We *always* return a dependent type, in such cases it is DependentTy. | |||
4798 | // This avoids creating type-dependent expressions with non-dependent types. | |||
4799 | // FIXME: is this important to avoid? See https://reviews.llvm.org/D107275 | |||
4800 | static QualType getDependentArraySubscriptType(Expr *LHS, Expr *RHS, | |||
4801 | const ASTContext &Ctx) { | |||
4802 | assert(LHS->isTypeDependent() || RHS->isTypeDependent())(static_cast <bool> (LHS->isTypeDependent() || RHS-> isTypeDependent()) ? void (0) : __assert_fail ("LHS->isTypeDependent() || RHS->isTypeDependent()" , "clang/lib/Sema/SemaExpr.cpp", 4802, __extension__ __PRETTY_FUNCTION__ )); | |||
4803 | QualType LTy = LHS->getType(), RTy = RHS->getType(); | |||
4804 | QualType Result = Ctx.DependentTy; | |||
4805 | if (RTy->isIntegralOrUnscopedEnumerationType()) { | |||
4806 | if (const PointerType *PT = LTy->getAs<PointerType>()) | |||
4807 | Result = PT->getPointeeType(); | |||
4808 | else if (const ArrayType *AT = LTy->getAsArrayTypeUnsafe()) | |||
4809 | Result = AT->getElementType(); | |||
4810 | } else if (LTy->isIntegralOrUnscopedEnumerationType()) { | |||
4811 | if (const PointerType *PT = RTy->getAs<PointerType>()) | |||
4812 | Result = PT->getPointeeType(); | |||
4813 | else if (const ArrayType *AT = RTy->getAsArrayTypeUnsafe()) | |||
4814 | Result = AT->getElementType(); | |||
4815 | } | |||
4816 | // Ensure we return a dependent type. | |||
4817 | return Result->isDependentType() ? Result : Ctx.DependentTy; | |||
4818 | } | |||
4819 | ||||
4820 | static bool checkArgsForPlaceholders(Sema &S, MultiExprArg args); | |||
4821 | ||||
4822 | ExprResult Sema::ActOnArraySubscriptExpr(Scope *S, Expr *base, | |||
4823 | SourceLocation lbLoc, | |||
4824 | MultiExprArg ArgExprs, | |||
4825 | SourceLocation rbLoc) { | |||
4826 | ||||
4827 | if (base && !base->getType().isNull() && | |||
4828 | base->hasPlaceholderType(BuiltinType::OMPArraySection)) | |||
4829 | return ActOnOMPArraySectionExpr(base, lbLoc, ArgExprs.front(), SourceLocation(), | |||
4830 | SourceLocation(), /*Length*/ nullptr, | |||
4831 | /*Stride=*/nullptr, rbLoc); | |||
4832 | ||||
4833 | // Since this might be a postfix expression, get rid of ParenListExprs. | |||
4834 | if (isa<ParenListExpr>(base)) { | |||
4835 | ExprResult result = MaybeConvertParenListExprToParenExpr(S, base); | |||
4836 | if (result.isInvalid()) | |||
4837 | return ExprError(); | |||
4838 | base = result.get(); | |||
4839 | } | |||
4840 | ||||
4841 | // Check if base and idx form a MatrixSubscriptExpr. | |||
4842 | // | |||
4843 | // Helper to check for comma expressions, which are not allowed as indices for | |||
4844 | // matrix subscript expressions. | |||
4845 | auto CheckAndReportCommaError = [this, base, rbLoc](Expr *E) { | |||
4846 | if (isa<BinaryOperator>(E) && cast<BinaryOperator>(E)->isCommaOp()) { | |||
4847 | Diag(E->getExprLoc(), diag::err_matrix_subscript_comma) | |||
4848 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4849 | return true; | |||
4850 | } | |||
4851 | return false; | |||
4852 | }; | |||
4853 | // The matrix subscript operator ([][])is considered a single operator. | |||
4854 | // Separating the index expressions by parenthesis is not allowed. | |||
4855 | if (base->hasPlaceholderType(BuiltinType::IncompleteMatrixIdx) && | |||
4856 | !isa<MatrixSubscriptExpr>(base)) { | |||
4857 | Diag(base->getExprLoc(), diag::err_matrix_separate_incomplete_index) | |||
4858 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4859 | return ExprError(); | |||
4860 | } | |||
4861 | // If the base is a MatrixSubscriptExpr, try to create a new | |||
4862 | // MatrixSubscriptExpr. | |||
4863 | auto *matSubscriptE = dyn_cast<MatrixSubscriptExpr>(base); | |||
4864 | if (matSubscriptE) { | |||
4865 | assert(ArgExprs.size() == 1)(static_cast <bool> (ArgExprs.size() == 1) ? void (0) : __assert_fail ("ArgExprs.size() == 1", "clang/lib/Sema/SemaExpr.cpp" , 4865, __extension__ __PRETTY_FUNCTION__)); | |||
4866 | if (CheckAndReportCommaError(ArgExprs.front())) | |||
4867 | return ExprError(); | |||
4868 | ||||
4869 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 4870, __extension__ __PRETTY_FUNCTION__ )) | |||
4870 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 4870, __extension__ __PRETTY_FUNCTION__ )); | |||
4871 | return CreateBuiltinMatrixSubscriptExpr(matSubscriptE->getBase(), | |||
4872 | matSubscriptE->getRowIdx(), | |||
4873 | ArgExprs.front(), rbLoc); | |||
4874 | } | |||
4875 | ||||
4876 | // Handle any non-overload placeholder types in the base and index | |||
4877 | // expressions. We can't handle overloads here because the other | |||
4878 | // operand might be an overloadable type, in which case the overload | |||
4879 | // resolution for the operator overload should get the first crack | |||
4880 | // at the overload. | |||
4881 | bool IsMSPropertySubscript = false; | |||
4882 | if (base->getType()->isNonOverloadPlaceholderType()) { | |||
4883 | IsMSPropertySubscript = isMSPropertySubscriptExpr(*this, base); | |||
4884 | if (!IsMSPropertySubscript) { | |||
4885 | ExprResult result = CheckPlaceholderExpr(base); | |||
4886 | if (result.isInvalid()) | |||
4887 | return ExprError(); | |||
4888 | base = result.get(); | |||
4889 | } | |||
4890 | } | |||
4891 | ||||
4892 | // If the base is a matrix type, try to create a new MatrixSubscriptExpr. | |||
4893 | if (base->getType()->isMatrixType()) { | |||
4894 | assert(ArgExprs.size() == 1)(static_cast <bool> (ArgExprs.size() == 1) ? void (0) : __assert_fail ("ArgExprs.size() == 1", "clang/lib/Sema/SemaExpr.cpp" , 4894, __extension__ __PRETTY_FUNCTION__)); | |||
4895 | if (CheckAndReportCommaError(ArgExprs.front())) | |||
4896 | return ExprError(); | |||
4897 | ||||
4898 | return CreateBuiltinMatrixSubscriptExpr(base, ArgExprs.front(), nullptr, | |||
4899 | rbLoc); | |||
4900 | } | |||
4901 | ||||
4902 | if (ArgExprs.size() == 1 && getLangOpts().CPlusPlus20) { | |||
4903 | Expr *idx = ArgExprs[0]; | |||
4904 | if ((isa<BinaryOperator>(idx) && cast<BinaryOperator>(idx)->isCommaOp()) || | |||
4905 | (isa<CXXOperatorCallExpr>(idx) && | |||
4906 | cast<CXXOperatorCallExpr>(idx)->getOperator() == OO_Comma)) { | |||
4907 | Diag(idx->getExprLoc(), diag::warn_deprecated_comma_subscript) | |||
4908 | << SourceRange(base->getBeginLoc(), rbLoc); | |||
4909 | } | |||
4910 | } | |||
4911 | ||||
4912 | if (ArgExprs.size() == 1 && | |||
4913 | ArgExprs[0]->getType()->isNonOverloadPlaceholderType()) { | |||
4914 | ExprResult result = CheckPlaceholderExpr(ArgExprs[0]); | |||
4915 | if (result.isInvalid()) | |||
4916 | return ExprError(); | |||
4917 | ArgExprs[0] = result.get(); | |||
4918 | } else { | |||
4919 | if (checkArgsForPlaceholders(*this, ArgExprs)) | |||
4920 | return ExprError(); | |||
4921 | } | |||
4922 | ||||
4923 | // Build an unanalyzed expression if either operand is type-dependent. | |||
4924 | if (getLangOpts().CPlusPlus && ArgExprs.size() == 1 && | |||
4925 | (base->isTypeDependent() || | |||
4926 | Expr::hasAnyTypeDependentArguments(ArgExprs)) && | |||
4927 | !isa<PackExpansionExpr>(ArgExprs[0])) { | |||
4928 | return new (Context) ArraySubscriptExpr( | |||
4929 | base, ArgExprs.front(), | |||
4930 | getDependentArraySubscriptType(base, ArgExprs.front(), getASTContext()), | |||
4931 | VK_LValue, OK_Ordinary, rbLoc); | |||
4932 | } | |||
4933 | ||||
4934 | // MSDN, property (C++) | |||
4935 | // https://msdn.microsoft.com/en-us/library/yhfk0thd(v=vs.120).aspx | |||
4936 | // This attribute can also be used in the declaration of an empty array in a | |||
4937 | // class or structure definition. For example: | |||
4938 | // __declspec(property(get=GetX, put=PutX)) int x[]; | |||
4939 | // The above statement indicates that x[] can be used with one or more array | |||
4940 | // indices. In this case, i=p->x[a][b] will be turned into i=p->GetX(a, b), | |||
4941 | // and p->x[a][b] = i will be turned into p->PutX(a, b, i); | |||
4942 | if (IsMSPropertySubscript) { | |||
4943 | assert(ArgExprs.size() == 1)(static_cast <bool> (ArgExprs.size() == 1) ? void (0) : __assert_fail ("ArgExprs.size() == 1", "clang/lib/Sema/SemaExpr.cpp" , 4943, __extension__ __PRETTY_FUNCTION__)); | |||
4944 | // Build MS property subscript expression if base is MS property reference | |||
4945 | // or MS property subscript. | |||
4946 | return new (Context) | |||
4947 | MSPropertySubscriptExpr(base, ArgExprs.front(), Context.PseudoObjectTy, | |||
4948 | VK_LValue, OK_Ordinary, rbLoc); | |||
4949 | } | |||
4950 | ||||
4951 | // Use C++ overloaded-operator rules if either operand has record | |||
4952 | // type. The spec says to do this if either type is *overloadable*, | |||
4953 | // but enum types can't declare subscript operators or conversion | |||
4954 | // operators, so there's nothing interesting for overload resolution | |||
4955 | // to do if there aren't any record types involved. | |||
4956 | // | |||
4957 | // ObjC pointers have their own subscripting logic that is not tied | |||
4958 | // to overload resolution and so should not take this path. | |||
4959 | if (getLangOpts().CPlusPlus && !base->getType()->isObjCObjectPointerType() && | |||
4960 | ((base->getType()->isRecordType() || | |||
4961 | (ArgExprs.size() != 1 || isa<PackExpansionExpr>(ArgExprs[0]) || | |||
4962 | ArgExprs[0]->getType()->isRecordType())))) { | |||
4963 | return CreateOverloadedArraySubscriptExpr(lbLoc, rbLoc, base, ArgExprs); | |||
4964 | } | |||
4965 | ||||
4966 | ExprResult Res = | |||
4967 | CreateBuiltinArraySubscriptExpr(base, lbLoc, ArgExprs.front(), rbLoc); | |||
4968 | ||||
4969 | if (!Res.isInvalid() && isa<ArraySubscriptExpr>(Res.get())) | |||
4970 | CheckSubscriptAccessOfNoDeref(cast<ArraySubscriptExpr>(Res.get())); | |||
4971 | ||||
4972 | return Res; | |||
4973 | } | |||
4974 | ||||
4975 | ExprResult Sema::tryConvertExprToType(Expr *E, QualType Ty) { | |||
4976 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(Ty); | |||
4977 | InitializationKind Kind = | |||
4978 | InitializationKind::CreateCopy(E->getBeginLoc(), SourceLocation()); | |||
4979 | InitializationSequence InitSeq(*this, Entity, Kind, E); | |||
4980 | return InitSeq.Perform(*this, Entity, Kind, E); | |||
4981 | } | |||
4982 | ||||
4983 | ExprResult Sema::CreateBuiltinMatrixSubscriptExpr(Expr *Base, Expr *RowIdx, | |||
4984 | Expr *ColumnIdx, | |||
4985 | SourceLocation RBLoc) { | |||
4986 | ExprResult BaseR = CheckPlaceholderExpr(Base); | |||
4987 | if (BaseR.isInvalid()) | |||
4988 | return BaseR; | |||
4989 | Base = BaseR.get(); | |||
4990 | ||||
4991 | ExprResult RowR = CheckPlaceholderExpr(RowIdx); | |||
4992 | if (RowR.isInvalid()) | |||
4993 | return RowR; | |||
4994 | RowIdx = RowR.get(); | |||
4995 | ||||
4996 | if (!ColumnIdx) | |||
4997 | return new (Context) MatrixSubscriptExpr( | |||
4998 | Base, RowIdx, ColumnIdx, Context.IncompleteMatrixIdxTy, RBLoc); | |||
4999 | ||||
5000 | // Build an unanalyzed expression if any of the operands is type-dependent. | |||
5001 | if (Base->isTypeDependent() || RowIdx->isTypeDependent() || | |||
5002 | ColumnIdx->isTypeDependent()) | |||
5003 | return new (Context) MatrixSubscriptExpr(Base, RowIdx, ColumnIdx, | |||
5004 | Context.DependentTy, RBLoc); | |||
5005 | ||||
5006 | ExprResult ColumnR = CheckPlaceholderExpr(ColumnIdx); | |||
5007 | if (ColumnR.isInvalid()) | |||
5008 | return ColumnR; | |||
5009 | ColumnIdx = ColumnR.get(); | |||
5010 | ||||
5011 | // Check that IndexExpr is an integer expression. If it is a constant | |||
5012 | // expression, check that it is less than Dim (= the number of elements in the | |||
5013 | // corresponding dimension). | |||
5014 | auto IsIndexValid = [&](Expr *IndexExpr, unsigned Dim, | |||
5015 | bool IsColumnIdx) -> Expr * { | |||
5016 | if (!IndexExpr->getType()->isIntegerType() && | |||
5017 | !IndexExpr->isTypeDependent()) { | |||
5018 | Diag(IndexExpr->getBeginLoc(), diag::err_matrix_index_not_integer) | |||
5019 | << IsColumnIdx; | |||
5020 | return nullptr; | |||
5021 | } | |||
5022 | ||||
5023 | if (std::optional<llvm::APSInt> Idx = | |||
5024 | IndexExpr->getIntegerConstantExpr(Context)) { | |||
5025 | if ((*Idx < 0 || *Idx >= Dim)) { | |||
5026 | Diag(IndexExpr->getBeginLoc(), diag::err_matrix_index_outside_range) | |||
5027 | << IsColumnIdx << Dim; | |||
5028 | return nullptr; | |||
5029 | } | |||
5030 | } | |||
5031 | ||||
5032 | ExprResult ConvExpr = | |||
5033 | tryConvertExprToType(IndexExpr, Context.getSizeType()); | |||
5034 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 5035, __extension__ __PRETTY_FUNCTION__ )) | |||
5035 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 5035, __extension__ __PRETTY_FUNCTION__ )); | |||
5036 | return ConvExpr.get(); | |||
5037 | }; | |||
5038 | ||||
5039 | auto *MTy = Base->getType()->getAs<ConstantMatrixType>(); | |||
5040 | RowIdx = IsIndexValid(RowIdx, MTy->getNumRows(), false); | |||
5041 | ColumnIdx = IsIndexValid(ColumnIdx, MTy->getNumColumns(), true); | |||
5042 | if (!RowIdx || !ColumnIdx) | |||
5043 | return ExprError(); | |||
5044 | ||||
5045 | return new (Context) MatrixSubscriptExpr(Base, RowIdx, ColumnIdx, | |||
5046 | MTy->getElementType(), RBLoc); | |||
5047 | } | |||
5048 | ||||
5049 | void Sema::CheckAddressOfNoDeref(const Expr *E) { | |||
5050 | ExpressionEvaluationContextRecord &LastRecord = ExprEvalContexts.back(); | |||
5051 | const Expr *StrippedExpr = E->IgnoreParenImpCasts(); | |||
5052 | ||||
5053 | // For expressions like `&(*s).b`, the base is recorded and what should be | |||
5054 | // checked. | |||
5055 | const MemberExpr *Member = nullptr; | |||
5056 | while ((Member = dyn_cast<MemberExpr>(StrippedExpr)) && !Member->isArrow()) | |||
5057 | StrippedExpr = Member->getBase()->IgnoreParenImpCasts(); | |||
5058 | ||||
5059 | LastRecord.PossibleDerefs.erase(StrippedExpr); | |||
5060 | } | |||
5061 | ||||
5062 | void Sema::CheckSubscriptAccessOfNoDeref(const ArraySubscriptExpr *E) { | |||
5063 | if (isUnevaluatedContext()) | |||
5064 | return; | |||
5065 | ||||
5066 | QualType ResultTy = E->getType(); | |||
5067 | ExpressionEvaluationContextRecord &LastRecord = ExprEvalContexts.back(); | |||
5068 | ||||
5069 | // Bail if the element is an array since it is not memory access. | |||
5070 | if (isa<ArrayType>(ResultTy)) | |||
5071 | return; | |||
5072 | ||||
5073 | if (ResultTy->hasAttr(attr::NoDeref)) { | |||
5074 | LastRecord.PossibleDerefs.insert(E); | |||
5075 | return; | |||
5076 | } | |||
5077 | ||||
5078 | // Check if the base type is a pointer to a member access of a struct | |||
5079 | // marked with noderef. | |||
5080 | const Expr *Base = E->getBase(); | |||
5081 | QualType BaseTy = Base->getType(); | |||
5082 | if (!(isa<ArrayType>(BaseTy) || isa<PointerType>(BaseTy))) | |||
5083 | // Not a pointer access | |||
5084 | return; | |||
5085 | ||||
5086 | const MemberExpr *Member = nullptr; | |||
5087 | while ((Member = dyn_cast<MemberExpr>(Base->IgnoreParenCasts())) && | |||
5088 | Member->isArrow()) | |||
5089 | Base = Member->getBase(); | |||
5090 | ||||
5091 | if (const auto *Ptr = dyn_cast<PointerType>(Base->getType())) { | |||
5092 | if (Ptr->getPointeeType()->hasAttr(attr::NoDeref)) | |||
5093 | LastRecord.PossibleDerefs.insert(E); | |||
5094 | } | |||
5095 | } | |||
5096 | ||||
5097 | ExprResult Sema::ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc, | |||
5098 | Expr *LowerBound, | |||
5099 | SourceLocation ColonLocFirst, | |||
5100 | SourceLocation ColonLocSecond, | |||
5101 | Expr *Length, Expr *Stride, | |||
5102 | SourceLocation RBLoc) { | |||
5103 | if (Base->hasPlaceholderType() && | |||
5104 | !Base->hasPlaceholderType(BuiltinType::OMPArraySection)) { | |||
5105 | ExprResult Result = CheckPlaceholderExpr(Base); | |||
5106 | if (Result.isInvalid()) | |||
5107 | return ExprError(); | |||
5108 | Base = Result.get(); | |||
5109 | } | |||
5110 | if (LowerBound && LowerBound->getType()->isNonOverloadPlaceholderType()) { | |||
5111 | ExprResult Result = CheckPlaceholderExpr(LowerBound); | |||
5112 | if (Result.isInvalid()) | |||
5113 | return ExprError(); | |||
5114 | Result = DefaultLvalueConversion(Result.get()); | |||
5115 | if (Result.isInvalid()) | |||
5116 | return ExprError(); | |||
5117 | LowerBound = Result.get(); | |||
5118 | } | |||
5119 | if (Length && Length->getType()->isNonOverloadPlaceholderType()) { | |||
5120 | ExprResult Result = CheckPlaceholderExpr(Length); | |||
5121 | if (Result.isInvalid()) | |||
5122 | return ExprError(); | |||
5123 | Result = DefaultLvalueConversion(Result.get()); | |||
5124 | if (Result.isInvalid()) | |||
5125 | return ExprError(); | |||
5126 | Length = Result.get(); | |||
5127 | } | |||
5128 | if (Stride && Stride->getType()->isNonOverloadPlaceholderType()) { | |||
5129 | ExprResult Result = CheckPlaceholderExpr(Stride); | |||
5130 | if (Result.isInvalid()) | |||
5131 | return ExprError(); | |||
5132 | Result = DefaultLvalueConversion(Result.get()); | |||
5133 | if (Result.isInvalid()) | |||
5134 | return ExprError(); | |||
5135 | Stride = Result.get(); | |||
5136 | } | |||
5137 | ||||
5138 | // Build an unanalyzed expression if either operand is type-dependent. | |||
5139 | if (Base->isTypeDependent() || | |||
5140 | (LowerBound && | |||
5141 | (LowerBound->isTypeDependent() || LowerBound->isValueDependent())) || | |||
5142 | (Length && (Length->isTypeDependent() || Length->isValueDependent())) || | |||
5143 | (Stride && (Stride->isTypeDependent() || Stride->isValueDependent()))) { | |||
5144 | return new (Context) OMPArraySectionExpr( | |||
5145 | Base, LowerBound, Length, Stride, Context.DependentTy, VK_LValue, | |||
5146 | OK_Ordinary, ColonLocFirst, ColonLocSecond, RBLoc); | |||
5147 | } | |||
5148 | ||||
5149 | // Perform default conversions. | |||
5150 | QualType OriginalTy = OMPArraySectionExpr::getBaseOriginalType(Base); | |||
5151 | QualType ResultTy; | |||
5152 | if (OriginalTy->isAnyPointerType()) { | |||
5153 | ResultTy = OriginalTy->getPointeeType(); | |||
5154 | } else if (OriginalTy->isArrayType()) { | |||
5155 | ResultTy = OriginalTy->getAsArrayTypeUnsafe()->getElementType(); | |||
5156 | } else { | |||
5157 | return ExprError( | |||
5158 | Diag(Base->getExprLoc(), diag::err_omp_typecheck_section_value) | |||
5159 | << Base->getSourceRange()); | |||
5160 | } | |||
5161 | // C99 6.5.2.1p1 | |||
5162 | if (LowerBound) { | |||
5163 | auto Res = PerformOpenMPImplicitIntegerConversion(LowerBound->getExprLoc(), | |||
5164 | LowerBound); | |||
5165 | if (Res.isInvalid()) | |||
5166 | return ExprError(Diag(LowerBound->getExprLoc(), | |||
5167 | diag::err_omp_typecheck_section_not_integer) | |||
5168 | << 0 << LowerBound->getSourceRange()); | |||
5169 | LowerBound = Res.get(); | |||
5170 | ||||
5171 | if (LowerBound->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5172 | LowerBound->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5173 | Diag(LowerBound->getExprLoc(), diag::warn_omp_section_is_char) | |||
5174 | << 0 << LowerBound->getSourceRange(); | |||
5175 | } | |||
5176 | if (Length) { | |||
5177 | auto Res = | |||
5178 | PerformOpenMPImplicitIntegerConversion(Length->getExprLoc(), Length); | |||
5179 | if (Res.isInvalid()) | |||
5180 | return ExprError(Diag(Length->getExprLoc(), | |||
5181 | diag::err_omp_typecheck_section_not_integer) | |||
5182 | << 1 << Length->getSourceRange()); | |||
5183 | Length = Res.get(); | |||
5184 | ||||
5185 | if (Length->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5186 | Length->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5187 | Diag(Length->getExprLoc(), diag::warn_omp_section_is_char) | |||
5188 | << 1 << Length->getSourceRange(); | |||
5189 | } | |||
5190 | if (Stride) { | |||
5191 | ExprResult Res = | |||
5192 | PerformOpenMPImplicitIntegerConversion(Stride->getExprLoc(), Stride); | |||
5193 | if (Res.isInvalid()) | |||
5194 | return ExprError(Diag(Stride->getExprLoc(), | |||
5195 | diag::err_omp_typecheck_section_not_integer) | |||
5196 | << 1 << Stride->getSourceRange()); | |||
5197 | Stride = Res.get(); | |||
5198 | ||||
5199 | if (Stride->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5200 | Stride->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5201 | Diag(Stride->getExprLoc(), diag::warn_omp_section_is_char) | |||
5202 | << 1 << Stride->getSourceRange(); | |||
5203 | } | |||
5204 | ||||
5205 | // C99 6.5.2.1p1: "shall have type "pointer to *object* type". Similarly, | |||
5206 | // C++ [expr.sub]p1: The type "T" shall be a completely-defined object | |||
5207 | // type. Note that functions are not objects, and that (in C99 parlance) | |||
5208 | // incomplete types are not object types. | |||
5209 | if (ResultTy->isFunctionType()) { | |||
5210 | Diag(Base->getExprLoc(), diag::err_omp_section_function_type) | |||
5211 | << ResultTy << Base->getSourceRange(); | |||
5212 | return ExprError(); | |||
5213 | } | |||
5214 | ||||
5215 | if (RequireCompleteType(Base->getExprLoc(), ResultTy, | |||
5216 | diag::err_omp_section_incomplete_type, Base)) | |||
5217 | return ExprError(); | |||
5218 | ||||
5219 | if (LowerBound && !OriginalTy->isAnyPointerType()) { | |||
5220 | Expr::EvalResult Result; | |||
5221 | if (LowerBound->EvaluateAsInt(Result, Context)) { | |||
5222 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5223 | // The array section must be a subset of the original array. | |||
5224 | llvm::APSInt LowerBoundValue = Result.Val.getInt(); | |||
5225 | if (LowerBoundValue.isNegative()) { | |||
5226 | Diag(LowerBound->getExprLoc(), diag::err_omp_section_not_subset_of_array) | |||
5227 | << LowerBound->getSourceRange(); | |||
5228 | return ExprError(); | |||
5229 | } | |||
5230 | } | |||
5231 | } | |||
5232 | ||||
5233 | if (Length) { | |||
5234 | Expr::EvalResult Result; | |||
5235 | if (Length->EvaluateAsInt(Result, Context)) { | |||
5236 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5237 | // The length must evaluate to non-negative integers. | |||
5238 | llvm::APSInt LengthValue = Result.Val.getInt(); | |||
5239 | if (LengthValue.isNegative()) { | |||
5240 | Diag(Length->getExprLoc(), diag::err_omp_section_length_negative) | |||
5241 | << toString(LengthValue, /*Radix=*/10, /*Signed=*/true) | |||
5242 | << Length->getSourceRange(); | |||
5243 | return ExprError(); | |||
5244 | } | |||
5245 | } | |||
5246 | } else if (ColonLocFirst.isValid() && | |||
5247 | (OriginalTy.isNull() || (!OriginalTy->isConstantArrayType() && | |||
5248 | !OriginalTy->isVariableArrayType()))) { | |||
5249 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5250 | // When the size of the array dimension is not known, the length must be | |||
5251 | // specified explicitly. | |||
5252 | Diag(ColonLocFirst, diag::err_omp_section_length_undefined) | |||
5253 | << (!OriginalTy.isNull() && OriginalTy->isArrayType()); | |||
5254 | return ExprError(); | |||
5255 | } | |||
5256 | ||||
5257 | if (Stride) { | |||
5258 | Expr::EvalResult Result; | |||
5259 | if (Stride->EvaluateAsInt(Result, Context)) { | |||
5260 | // OpenMP 5.0, [2.1.5 Array Sections] | |||
5261 | // The stride must evaluate to a positive integer. | |||
5262 | llvm::APSInt StrideValue = Result.Val.getInt(); | |||
5263 | if (!StrideValue.isStrictlyPositive()) { | |||
5264 | Diag(Stride->getExprLoc(), diag::err_omp_section_stride_non_positive) | |||
5265 | << toString(StrideValue, /*Radix=*/10, /*Signed=*/true) | |||
5266 | << Stride->getSourceRange(); | |||
5267 | return ExprError(); | |||
5268 | } | |||
5269 | } | |||
5270 | } | |||
5271 | ||||
5272 | if (!Base->hasPlaceholderType(BuiltinType::OMPArraySection)) { | |||
5273 | ExprResult Result = DefaultFunctionArrayLvalueConversion(Base); | |||
5274 | if (Result.isInvalid()) | |||
5275 | return ExprError(); | |||
5276 | Base = Result.get(); | |||
5277 | } | |||
5278 | return new (Context) OMPArraySectionExpr( | |||
5279 | Base, LowerBound, Length, Stride, Context.OMPArraySectionTy, VK_LValue, | |||
5280 | OK_Ordinary, ColonLocFirst, ColonLocSecond, RBLoc); | |||
5281 | } | |||
5282 | ||||
5283 | ExprResult Sema::ActOnOMPArrayShapingExpr(Expr *Base, SourceLocation LParenLoc, | |||
5284 | SourceLocation RParenLoc, | |||
5285 | ArrayRef<Expr *> Dims, | |||
5286 | ArrayRef<SourceRange> Brackets) { | |||
5287 | if (Base->hasPlaceholderType()) { | |||
5288 | ExprResult Result = CheckPlaceholderExpr(Base); | |||
5289 | if (Result.isInvalid()) | |||
5290 | return ExprError(); | |||
5291 | Result = DefaultLvalueConversion(Result.get()); | |||
5292 | if (Result.isInvalid()) | |||
5293 | return ExprError(); | |||
5294 | Base = Result.get(); | |||
5295 | } | |||
5296 | QualType BaseTy = Base->getType(); | |||
5297 | // Delay analysis of the types/expressions if instantiation/specialization is | |||
5298 | // required. | |||
5299 | if (!BaseTy->isPointerType() && Base->isTypeDependent()) | |||
5300 | return OMPArrayShapingExpr::Create(Context, Context.DependentTy, Base, | |||
5301 | LParenLoc, RParenLoc, Dims, Brackets); | |||
5302 | if (!BaseTy->isPointerType() || | |||
5303 | (!Base->isTypeDependent() && | |||
5304 | BaseTy->getPointeeType()->isIncompleteType())) | |||
5305 | return ExprError(Diag(Base->getExprLoc(), | |||
5306 | diag::err_omp_non_pointer_type_array_shaping_base) | |||
5307 | << Base->getSourceRange()); | |||
5308 | ||||
5309 | SmallVector<Expr *, 4> NewDims; | |||
5310 | bool ErrorFound = false; | |||
5311 | for (Expr *Dim : Dims) { | |||
5312 | if (Dim->hasPlaceholderType()) { | |||
5313 | ExprResult Result = CheckPlaceholderExpr(Dim); | |||
5314 | if (Result.isInvalid()) { | |||
5315 | ErrorFound = true; | |||
5316 | continue; | |||
5317 | } | |||
5318 | Result = DefaultLvalueConversion(Result.get()); | |||
5319 | if (Result.isInvalid()) { | |||
5320 | ErrorFound = true; | |||
5321 | continue; | |||
5322 | } | |||
5323 | Dim = Result.get(); | |||
5324 | } | |||
5325 | if (!Dim->isTypeDependent()) { | |||
5326 | ExprResult Result = | |||
5327 | PerformOpenMPImplicitIntegerConversion(Dim->getExprLoc(), Dim); | |||
5328 | if (Result.isInvalid()) { | |||
5329 | ErrorFound = true; | |||
5330 | Diag(Dim->getExprLoc(), diag::err_omp_typecheck_shaping_not_integer) | |||
5331 | << Dim->getSourceRange(); | |||
5332 | continue; | |||
5333 | } | |||
5334 | Dim = Result.get(); | |||
5335 | Expr::EvalResult EvResult; | |||
5336 | if (!Dim->isValueDependent() && Dim->EvaluateAsInt(EvResult, Context)) { | |||
5337 | // OpenMP 5.0, [2.1.4 Array Shaping] | |||
5338 | // Each si is an integral type expression that must evaluate to a | |||
5339 | // positive integer. | |||
5340 | llvm::APSInt Value = EvResult.Val.getInt(); | |||
5341 | if (!Value.isStrictlyPositive()) { | |||
5342 | Diag(Dim->getExprLoc(), diag::err_omp_shaping_dimension_not_positive) | |||
5343 | << toString(Value, /*Radix=*/10, /*Signed=*/true) | |||
5344 | << Dim->getSourceRange(); | |||
5345 | ErrorFound = true; | |||
5346 | continue; | |||
5347 | } | |||
5348 | } | |||
5349 | } | |||
5350 | NewDims.push_back(Dim); | |||
5351 | } | |||
5352 | if (ErrorFound) | |||
5353 | return ExprError(); | |||
5354 | return OMPArrayShapingExpr::Create(Context, Context.OMPArrayShapingTy, Base, | |||
5355 | LParenLoc, RParenLoc, NewDims, Brackets); | |||
5356 | } | |||
5357 | ||||
5358 | ExprResult Sema::ActOnOMPIteratorExpr(Scope *S, SourceLocation IteratorKwLoc, | |||
5359 | SourceLocation LLoc, SourceLocation RLoc, | |||
5360 | ArrayRef<OMPIteratorData> Data) { | |||
5361 | SmallVector<OMPIteratorExpr::IteratorDefinition, 4> ID; | |||
5362 | bool IsCorrect = true; | |||
5363 | for (const OMPIteratorData &D : Data) { | |||
5364 | TypeSourceInfo *TInfo = nullptr; | |||
5365 | SourceLocation StartLoc; | |||
5366 | QualType DeclTy; | |||
5367 | if (!D.Type.getAsOpaquePtr()) { | |||
5368 | // OpenMP 5.0, 2.1.6 Iterators | |||
5369 | // In an iterator-specifier, if the iterator-type is not specified then | |||
5370 | // the type of that iterator is of int type. | |||
5371 | DeclTy = Context.IntTy; | |||
5372 | StartLoc = D.DeclIdentLoc; | |||
5373 | } else { | |||
5374 | DeclTy = GetTypeFromParser(D.Type, &TInfo); | |||
5375 | StartLoc = TInfo->getTypeLoc().getBeginLoc(); | |||
5376 | } | |||
5377 | ||||
5378 | bool IsDeclTyDependent = DeclTy->isDependentType() || | |||
5379 | DeclTy->containsUnexpandedParameterPack() || | |||
5380 | DeclTy->isInstantiationDependentType(); | |||
5381 | if (!IsDeclTyDependent) { | |||
5382 | if (!DeclTy->isIntegralType(Context) && !DeclTy->isAnyPointerType()) { | |||
5383 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions, C/C++ | |||
5384 | // The iterator-type must be an integral or pointer type. | |||
5385 | Diag(StartLoc, diag::err_omp_iterator_not_integral_or_pointer) | |||
5386 | << DeclTy; | |||
5387 | IsCorrect = false; | |||
5388 | continue; | |||
5389 | } | |||
5390 | if (DeclTy.isConstant(Context)) { | |||
5391 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions, C/C++ | |||
5392 | // The iterator-type must not be const qualified. | |||
5393 | Diag(StartLoc, diag::err_omp_iterator_not_integral_or_pointer) | |||
5394 | << DeclTy; | |||
5395 | IsCorrect = false; | |||
5396 | continue; | |||
5397 | } | |||
5398 | } | |||
5399 | ||||
5400 | // Iterator declaration. | |||
5401 | assert(D.DeclIdent && "Identifier expected.")(static_cast <bool> (D.DeclIdent && "Identifier expected." ) ? void (0) : __assert_fail ("D.DeclIdent && \"Identifier expected.\"" , "clang/lib/Sema/SemaExpr.cpp", 5401, __extension__ __PRETTY_FUNCTION__ )); | |||
5402 | // Always try to create iterator declarator to avoid extra error messages | |||
5403 | // about unknown declarations use. | |||
5404 | auto *VD = VarDecl::Create(Context, CurContext, StartLoc, D.DeclIdentLoc, | |||
5405 | D.DeclIdent, DeclTy, TInfo, SC_None); | |||
5406 | VD->setImplicit(); | |||
5407 | if (S) { | |||
5408 | // Check for conflicting previous declaration. | |||
5409 | DeclarationNameInfo NameInfo(VD->getDeclName(), D.DeclIdentLoc); | |||
5410 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | |||
5411 | ForVisibleRedeclaration); | |||
5412 | Previous.suppressDiagnostics(); | |||
5413 | LookupName(Previous, S); | |||
5414 | ||||
5415 | FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage=*/false, | |||
5416 | /*AllowInlineNamespace=*/false); | |||
5417 | if (!Previous.empty()) { | |||
5418 | NamedDecl *Old = Previous.getRepresentativeDecl(); | |||
5419 | Diag(D.DeclIdentLoc, diag::err_redefinition) << VD->getDeclName(); | |||
5420 | Diag(Old->getLocation(), diag::note_previous_definition); | |||
5421 | } else { | |||
5422 | PushOnScopeChains(VD, S); | |||
5423 | } | |||
5424 | } else { | |||
5425 | CurContext->addDecl(VD); | |||
5426 | } | |||
5427 | ||||
5428 | /// Act on the iterator variable declaration. | |||
5429 | ActOnOpenMPIteratorVarDecl(VD); | |||
5430 | ||||
5431 | Expr *Begin = D.Range.Begin; | |||
5432 | if (!IsDeclTyDependent && Begin && !Begin->isTypeDependent()) { | |||
5433 | ExprResult BeginRes = | |||
5434 | PerformImplicitConversion(Begin, DeclTy, AA_Converting); | |||
5435 | Begin = BeginRes.get(); | |||
5436 | } | |||
5437 | Expr *End = D.Range.End; | |||
5438 | if (!IsDeclTyDependent && End && !End->isTypeDependent()) { | |||
5439 | ExprResult EndRes = PerformImplicitConversion(End, DeclTy, AA_Converting); | |||
5440 | End = EndRes.get(); | |||
5441 | } | |||
5442 | Expr *Step = D.Range.Step; | |||
5443 | if (!IsDeclTyDependent && Step && !Step->isTypeDependent()) { | |||
5444 | if (!Step->getType()->isIntegralType(Context)) { | |||
5445 | Diag(Step->getExprLoc(), diag::err_omp_iterator_step_not_integral) | |||
5446 | << Step << Step->getSourceRange(); | |||
5447 | IsCorrect = false; | |||
5448 | continue; | |||
5449 | } | |||
5450 | std::optional<llvm::APSInt> Result = | |||
5451 | Step->getIntegerConstantExpr(Context); | |||
5452 | // OpenMP 5.0, 2.1.6 Iterators, Restrictions | |||
5453 | // If the step expression of a range-specification equals zero, the | |||
5454 | // behavior is unspecified. | |||
5455 | if (Result && Result->isZero()) { | |||
5456 | Diag(Step->getExprLoc(), diag::err_omp_iterator_step_constant_zero) | |||
5457 | << Step << Step->getSourceRange(); | |||
5458 | IsCorrect = false; | |||
5459 | continue; | |||
5460 | } | |||
5461 | } | |||
5462 | if (!Begin || !End || !IsCorrect) { | |||
5463 | IsCorrect = false; | |||
5464 | continue; | |||
5465 | } | |||
5466 | OMPIteratorExpr::IteratorDefinition &IDElem = ID.emplace_back(); | |||
5467 | IDElem.IteratorDecl = VD; | |||
5468 | IDElem.AssignmentLoc = D.AssignLoc; | |||
5469 | IDElem.Range.Begin = Begin; | |||
5470 | IDElem.Range.End = End; | |||
5471 | IDElem.Range.Step = Step; | |||
5472 | IDElem.ColonLoc = D.ColonLoc; | |||
5473 | IDElem.SecondColonLoc = D.SecColonLoc; | |||
5474 | } | |||
5475 | if (!IsCorrect) { | |||
5476 | // Invalidate all created iterator declarations if error is found. | |||
5477 | for (const OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5478 | if (Decl *ID = D.IteratorDecl) | |||
5479 | ID->setInvalidDecl(); | |||
5480 | } | |||
5481 | return ExprError(); | |||
5482 | } | |||
5483 | SmallVector<OMPIteratorHelperData, 4> Helpers; | |||
5484 | if (!CurContext->isDependentContext()) { | |||
5485 | // Build number of ityeration for each iteration range. | |||
5486 | // Ni = ((Stepi > 0) ? ((Endi + Stepi -1 - Begini)/Stepi) : | |||
5487 | // ((Begini-Stepi-1-Endi) / -Stepi); | |||
5488 | for (OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5489 | // (Endi - Begini) | |||
5490 | ExprResult Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, D.Range.End, | |||
5491 | D.Range.Begin); | |||
5492 | if(!Res.isUsable()) { | |||
5493 | IsCorrect = false; | |||
5494 | continue; | |||
5495 | } | |||
5496 | ExprResult St, St1; | |||
5497 | if (D.Range.Step) { | |||
5498 | St = D.Range.Step; | |||
5499 | // (Endi - Begini) + Stepi | |||
5500 | Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, Res.get(), St.get()); | |||
5501 | if (!Res.isUsable()) { | |||
5502 | IsCorrect = false; | |||
5503 | continue; | |||
5504 | } | |||
5505 | // (Endi - Begini) + Stepi - 1 | |||
5506 | Res = | |||
5507 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, Res.get(), | |||
5508 | ActOnIntegerConstant(D.AssignmentLoc, 1).get()); | |||
5509 | if (!Res.isUsable()) { | |||
5510 | IsCorrect = false; | |||
5511 | continue; | |||
5512 | } | |||
5513 | // ((Endi - Begini) + Stepi - 1) / Stepi | |||
5514 | Res = CreateBuiltinBinOp(D.AssignmentLoc, BO_Div, Res.get(), St.get()); | |||
5515 | if (!Res.isUsable()) { | |||
5516 | IsCorrect = false; | |||
5517 | continue; | |||
5518 | } | |||
5519 | St1 = CreateBuiltinUnaryOp(D.AssignmentLoc, UO_Minus, D.Range.Step); | |||
5520 | // (Begini - Endi) | |||
5521 | ExprResult Res1 = CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, | |||
5522 | D.Range.Begin, D.Range.End); | |||
5523 | if (!Res1.isUsable()) { | |||
5524 | IsCorrect = false; | |||
5525 | continue; | |||
5526 | } | |||
5527 | // (Begini - Endi) - Stepi | |||
5528 | Res1 = | |||
5529 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, Res1.get(), St1.get()); | |||
5530 | if (!Res1.isUsable()) { | |||
5531 | IsCorrect = false; | |||
5532 | continue; | |||
5533 | } | |||
5534 | // (Begini - Endi) - Stepi - 1 | |||
5535 | Res1 = | |||
5536 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Sub, Res1.get(), | |||
5537 | ActOnIntegerConstant(D.AssignmentLoc, 1).get()); | |||
5538 | if (!Res1.isUsable()) { | |||
5539 | IsCorrect = false; | |||
5540 | continue; | |||
5541 | } | |||
5542 | // ((Begini - Endi) - Stepi - 1) / (-Stepi) | |||
5543 | Res1 = | |||
5544 | CreateBuiltinBinOp(D.AssignmentLoc, BO_Div, Res1.get(), St1.get()); | |||
5545 | if (!Res1.isUsable()) { | |||
5546 | IsCorrect = false; | |||
5547 | continue; | |||
5548 | } | |||
5549 | // Stepi > 0. | |||
5550 | ExprResult CmpRes = | |||
5551 | CreateBuiltinBinOp(D.AssignmentLoc, BO_GT, D.Range.Step, | |||
5552 | ActOnIntegerConstant(D.AssignmentLoc, 0).get()); | |||
5553 | if (!CmpRes.isUsable()) { | |||
5554 | IsCorrect = false; | |||
5555 | continue; | |||
5556 | } | |||
5557 | Res = ActOnConditionalOp(D.AssignmentLoc, D.AssignmentLoc, CmpRes.get(), | |||
5558 | Res.get(), Res1.get()); | |||
5559 | if (!Res.isUsable()) { | |||
5560 | IsCorrect = false; | |||
5561 | continue; | |||
5562 | } | |||
5563 | } | |||
5564 | Res = ActOnFinishFullExpr(Res.get(), /*DiscardedValue=*/false); | |||
5565 | if (!Res.isUsable()) { | |||
5566 | IsCorrect = false; | |||
5567 | continue; | |||
5568 | } | |||
5569 | ||||
5570 | // Build counter update. | |||
5571 | // Build counter. | |||
5572 | auto *CounterVD = | |||
5573 | VarDecl::Create(Context, CurContext, D.IteratorDecl->getBeginLoc(), | |||
5574 | D.IteratorDecl->getBeginLoc(), nullptr, | |||
5575 | Res.get()->getType(), nullptr, SC_None); | |||
5576 | CounterVD->setImplicit(); | |||
5577 | ExprResult RefRes = | |||
5578 | BuildDeclRefExpr(CounterVD, CounterVD->getType(), VK_LValue, | |||
5579 | D.IteratorDecl->getBeginLoc()); | |||
5580 | // Build counter update. | |||
5581 | // I = Begini + counter * Stepi; | |||
5582 | ExprResult UpdateRes; | |||
5583 | if (D.Range.Step) { | |||
5584 | UpdateRes = CreateBuiltinBinOp( | |||
5585 | D.AssignmentLoc, BO_Mul, | |||
5586 | DefaultLvalueConversion(RefRes.get()).get(), St.get()); | |||
5587 | } else { | |||
5588 | UpdateRes = DefaultLvalueConversion(RefRes.get()); | |||
5589 | } | |||
5590 | if (!UpdateRes.isUsable()) { | |||
5591 | IsCorrect = false; | |||
5592 | continue; | |||
5593 | } | |||
5594 | UpdateRes = CreateBuiltinBinOp(D.AssignmentLoc, BO_Add, D.Range.Begin, | |||
5595 | UpdateRes.get()); | |||
5596 | if (!UpdateRes.isUsable()) { | |||
5597 | IsCorrect = false; | |||
5598 | continue; | |||
5599 | } | |||
5600 | ExprResult VDRes = | |||
5601 | BuildDeclRefExpr(cast<VarDecl>(D.IteratorDecl), | |||
5602 | cast<VarDecl>(D.IteratorDecl)->getType(), VK_LValue, | |||
5603 | D.IteratorDecl->getBeginLoc()); | |||
5604 | UpdateRes = CreateBuiltinBinOp(D.AssignmentLoc, BO_Assign, VDRes.get(), | |||
5605 | UpdateRes.get()); | |||
5606 | if (!UpdateRes.isUsable()) { | |||
5607 | IsCorrect = false; | |||
5608 | continue; | |||
5609 | } | |||
5610 | UpdateRes = | |||
5611 | ActOnFinishFullExpr(UpdateRes.get(), /*DiscardedValue=*/true); | |||
5612 | if (!UpdateRes.isUsable()) { | |||
5613 | IsCorrect = false; | |||
5614 | continue; | |||
5615 | } | |||
5616 | ExprResult CounterUpdateRes = | |||
5617 | CreateBuiltinUnaryOp(D.AssignmentLoc, UO_PreInc, RefRes.get()); | |||
5618 | if (!CounterUpdateRes.isUsable()) { | |||
5619 | IsCorrect = false; | |||
5620 | continue; | |||
5621 | } | |||
5622 | CounterUpdateRes = | |||
5623 | ActOnFinishFullExpr(CounterUpdateRes.get(), /*DiscardedValue=*/true); | |||
5624 | if (!CounterUpdateRes.isUsable()) { | |||
5625 | IsCorrect = false; | |||
5626 | continue; | |||
5627 | } | |||
5628 | OMPIteratorHelperData &HD = Helpers.emplace_back(); | |||
5629 | HD.CounterVD = CounterVD; | |||
5630 | HD.Upper = Res.get(); | |||
5631 | HD.Update = UpdateRes.get(); | |||
5632 | HD.CounterUpdate = CounterUpdateRes.get(); | |||
5633 | } | |||
5634 | } else { | |||
5635 | Helpers.assign(ID.size(), {}); | |||
5636 | } | |||
5637 | if (!IsCorrect) { | |||
5638 | // Invalidate all created iterator declarations if error is found. | |||
5639 | for (const OMPIteratorExpr::IteratorDefinition &D : ID) { | |||
5640 | if (Decl *ID = D.IteratorDecl) | |||
5641 | ID->setInvalidDecl(); | |||
5642 | } | |||
5643 | return ExprError(); | |||
5644 | } | |||
5645 | return OMPIteratorExpr::Create(Context, Context.OMPIteratorTy, IteratorKwLoc, | |||
5646 | LLoc, RLoc, ID, Helpers); | |||
5647 | } | |||
5648 | ||||
5649 | ExprResult | |||
5650 | Sema::CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, | |||
5651 | Expr *Idx, SourceLocation RLoc) { | |||
5652 | Expr *LHSExp = Base; | |||
5653 | Expr *RHSExp = Idx; | |||
5654 | ||||
5655 | ExprValueKind VK = VK_LValue; | |||
5656 | ExprObjectKind OK = OK_Ordinary; | |||
5657 | ||||
5658 | // Per C++ core issue 1213, the result is an xvalue if either operand is | |||
5659 | // a non-lvalue array, and an lvalue otherwise. | |||
5660 | if (getLangOpts().CPlusPlus11) { | |||
5661 | for (auto *Op : {LHSExp, RHSExp}) { | |||
5662 | Op = Op->IgnoreImplicit(); | |||
5663 | if (Op->getType()->isArrayType() && !Op->isLValue()) | |||
5664 | VK = VK_XValue; | |||
5665 | } | |||
5666 | } | |||
5667 | ||||
5668 | // Perform default conversions. | |||
5669 | if (!LHSExp->getType()->getAs<VectorType>()) { | |||
5670 | ExprResult Result = DefaultFunctionArrayLvalueConversion(LHSExp); | |||
5671 | if (Result.isInvalid()) | |||
5672 | return ExprError(); | |||
5673 | LHSExp = Result.get(); | |||
5674 | } | |||
5675 | ExprResult Result = DefaultFunctionArrayLvalueConversion(RHSExp); | |||
5676 | if (Result.isInvalid()) | |||
5677 | return ExprError(); | |||
5678 | RHSExp = Result.get(); | |||
5679 | ||||
5680 | QualType LHSTy = LHSExp->getType(), RHSTy = RHSExp->getType(); | |||
5681 | ||||
5682 | // C99 6.5.2.1p2: the expression e1[e2] is by definition precisely equivalent | |||
5683 | // to the expression *((e1)+(e2)). This means the array "Base" may actually be | |||
5684 | // in the subscript position. As a result, we need to derive the array base | |||
5685 | // and index from the expression types. | |||
5686 | Expr *BaseExpr, *IndexExpr; | |||
5687 | QualType ResultType; | |||
5688 | if (LHSTy->isDependentType() || RHSTy->isDependentType()) { | |||
5689 | BaseExpr = LHSExp; | |||
5690 | IndexExpr = RHSExp; | |||
5691 | ResultType = | |||
5692 | getDependentArraySubscriptType(LHSExp, RHSExp, getASTContext()); | |||
5693 | } else if (const PointerType *PTy = LHSTy->getAs<PointerType>()) { | |||
5694 | BaseExpr = LHSExp; | |||
5695 | IndexExpr = RHSExp; | |||
5696 | ResultType = PTy->getPointeeType(); | |||
5697 | } else if (const ObjCObjectPointerType *PTy = | |||
5698 | LHSTy->getAs<ObjCObjectPointerType>()) { | |||
5699 | BaseExpr = LHSExp; | |||
5700 | IndexExpr = RHSExp; | |||
5701 | ||||
5702 | // Use custom logic if this should be the pseudo-object subscript | |||
5703 | // expression. | |||
5704 | if (!LangOpts.isSubscriptPointerArithmetic()) | |||
5705 | return BuildObjCSubscriptExpression(RLoc, BaseExpr, IndexExpr, nullptr, | |||
5706 | nullptr); | |||
5707 | ||||
5708 | ResultType = PTy->getPointeeType(); | |||
5709 | } else if (const PointerType *PTy = RHSTy->getAs<PointerType>()) { | |||
5710 | // Handle the uncommon case of "123[Ptr]". | |||
5711 | BaseExpr = RHSExp; | |||
5712 | IndexExpr = LHSExp; | |||
5713 | ResultType = PTy->getPointeeType(); | |||
5714 | } else if (const ObjCObjectPointerType *PTy = | |||
5715 | RHSTy->getAs<ObjCObjectPointerType>()) { | |||
5716 | // Handle the uncommon case of "123[Ptr]". | |||
5717 | BaseExpr = RHSExp; | |||
5718 | IndexExpr = LHSExp; | |||
5719 | ResultType = PTy->getPointeeType(); | |||
5720 | if (!LangOpts.isSubscriptPointerArithmetic()) { | |||
5721 | Diag(LLoc, diag::err_subscript_nonfragile_interface) | |||
5722 | << ResultType << BaseExpr->getSourceRange(); | |||
5723 | return ExprError(); | |||
5724 | } | |||
5725 | } else if (const VectorType *VTy = LHSTy->getAs<VectorType>()) { | |||
5726 | BaseExpr = LHSExp; // vectors: V[123] | |||
5727 | IndexExpr = RHSExp; | |||
5728 | // We apply C++ DR1213 to vector subscripting too. | |||
5729 | if (getLangOpts().CPlusPlus11 && LHSExp->isPRValue()) { | |||
5730 | ExprResult Materialized = TemporaryMaterializationConversion(LHSExp); | |||
5731 | if (Materialized.isInvalid()) | |||
5732 | return ExprError(); | |||
5733 | LHSExp = Materialized.get(); | |||
5734 | } | |||
5735 | VK = LHSExp->getValueKind(); | |||
5736 | if (VK != VK_PRValue) | |||
5737 | OK = OK_VectorComponent; | |||
5738 | ||||
5739 | ResultType = VTy->getElementType(); | |||
5740 | QualType BaseType = BaseExpr->getType(); | |||
5741 | Qualifiers BaseQuals = BaseType.getQualifiers(); | |||
5742 | Qualifiers MemberQuals = ResultType.getQualifiers(); | |||
5743 | Qualifiers Combined = BaseQuals + MemberQuals; | |||
5744 | if (Combined != MemberQuals) | |||
5745 | ResultType = Context.getQualifiedType(ResultType, Combined); | |||
5746 | } else if (LHSTy->isBuiltinType() && | |||
5747 | LHSTy->getAs<BuiltinType>()->isVLSTBuiltinType()) { | |||
5748 | const BuiltinType *BTy = LHSTy->getAs<BuiltinType>(); | |||
5749 | if (BTy->isSVEBool()) | |||
5750 | return ExprError(Diag(LLoc, diag::err_subscript_svbool_t) | |||
5751 | << LHSExp->getSourceRange() << RHSExp->getSourceRange()); | |||
5752 | ||||
5753 | BaseExpr = LHSExp; | |||
5754 | IndexExpr = RHSExp; | |||
5755 | if (getLangOpts().CPlusPlus11 && LHSExp->isPRValue()) { | |||
5756 | ExprResult Materialized = TemporaryMaterializationConversion(LHSExp); | |||
5757 | if (Materialized.isInvalid()) | |||
5758 | return ExprError(); | |||
5759 | LHSExp = Materialized.get(); | |||
5760 | } | |||
5761 | VK = LHSExp->getValueKind(); | |||
5762 | if (VK != VK_PRValue) | |||
5763 | OK = OK_VectorComponent; | |||
5764 | ||||
5765 | ResultType = BTy->getSveEltType(Context); | |||
5766 | ||||
5767 | QualType BaseType = BaseExpr->getType(); | |||
5768 | Qualifiers BaseQuals = BaseType.getQualifiers(); | |||
5769 | Qualifiers MemberQuals = ResultType.getQualifiers(); | |||
5770 | Qualifiers Combined = BaseQuals + MemberQuals; | |||
5771 | if (Combined != MemberQuals) | |||
5772 | ResultType = Context.getQualifiedType(ResultType, Combined); | |||
5773 | } else if (LHSTy->isArrayType()) { | |||
5774 | // If we see an array that wasn't promoted by | |||
5775 | // DefaultFunctionArrayLvalueConversion, it must be an array that | |||
5776 | // wasn't promoted because of the C90 rule that doesn't | |||
5777 | // allow promoting non-lvalue arrays. Warn, then | |||
5778 | // force the promotion here. | |||
5779 | Diag(LHSExp->getBeginLoc(), diag::ext_subscript_non_lvalue) | |||
5780 | << LHSExp->getSourceRange(); | |||
5781 | LHSExp = ImpCastExprToType(LHSExp, Context.getArrayDecayedType(LHSTy), | |||
5782 | CK_ArrayToPointerDecay).get(); | |||
5783 | LHSTy = LHSExp->getType(); | |||
5784 | ||||
5785 | BaseExpr = LHSExp; | |||
5786 | IndexExpr = RHSExp; | |||
5787 | ResultType = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
5788 | } else if (RHSTy->isArrayType()) { | |||
5789 | // Same as previous, except for 123[f().a] case | |||
5790 | Diag(RHSExp->getBeginLoc(), diag::ext_subscript_non_lvalue) | |||
5791 | << RHSExp->getSourceRange(); | |||
5792 | RHSExp = ImpCastExprToType(RHSExp, Context.getArrayDecayedType(RHSTy), | |||
5793 | CK_ArrayToPointerDecay).get(); | |||
5794 | RHSTy = RHSExp->getType(); | |||
5795 | ||||
5796 | BaseExpr = RHSExp; | |||
5797 | IndexExpr = LHSExp; | |||
5798 | ResultType = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
5799 | } else { | |||
5800 | return ExprError(Diag(LLoc, diag::err_typecheck_subscript_value) | |||
5801 | << LHSExp->getSourceRange() << RHSExp->getSourceRange()); | |||
5802 | } | |||
5803 | // C99 6.5.2.1p1 | |||
5804 | if (!IndexExpr->getType()->isIntegerType() && !IndexExpr->isTypeDependent()) | |||
5805 | return ExprError(Diag(LLoc, diag::err_typecheck_subscript_not_integer) | |||
5806 | << IndexExpr->getSourceRange()); | |||
5807 | ||||
5808 | if ((IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
5809 | IndexExpr->getType()->isSpecificBuiltinType(BuiltinType::Char_U)) | |||
5810 | && !IndexExpr->isTypeDependent()) | |||
5811 | Diag(LLoc, diag::warn_subscript_is_char) << IndexExpr->getSourceRange(); | |||
5812 | ||||
5813 | // C99 6.5.2.1p1: "shall have type "pointer to *object* type". Similarly, | |||
5814 | // C++ [expr.sub]p1: The type "T" shall be a completely-defined object | |||
5815 | // type. Note that Functions are not objects, and that (in C99 parlance) | |||
5816 | // incomplete types are not object types. | |||
5817 | if (ResultType->isFunctionType()) { | |||
5818 | Diag(BaseExpr->getBeginLoc(), diag::err_subscript_function_type) | |||
5819 | << ResultType << BaseExpr->getSourceRange(); | |||
5820 | return ExprError(); | |||
5821 | } | |||
5822 | ||||
5823 | if (ResultType->isVoidType() && !getLangOpts().CPlusPlus) { | |||
5824 | // GNU extension: subscripting on pointer to void | |||
5825 | Diag(LLoc, diag::ext_gnu_subscript_void_type) | |||
5826 | << BaseExpr->getSourceRange(); | |||
5827 | ||||
5828 | // C forbids expressions of unqualified void type from being l-values. | |||
5829 | // See IsCForbiddenLValueType. | |||
5830 | if (!ResultType.hasQualifiers()) | |||
5831 | VK = VK_PRValue; | |||
5832 | } else if (!ResultType->isDependentType() && | |||
5833 | RequireCompleteSizedType( | |||
5834 | LLoc, ResultType, | |||
5835 | diag::err_subscript_incomplete_or_sizeless_type, BaseExpr)) | |||
5836 | return ExprError(); | |||
5837 | ||||
5838 | 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()" , "clang/lib/Sema/SemaExpr.cpp", 5839, __extension__ __PRETTY_FUNCTION__ )) | |||
5839 | !ResultType.isCForbiddenLValueType())(static_cast <bool> (VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()) ? void (0) : __assert_fail ("VK == VK_PRValue || LangOpts.CPlusPlus || !ResultType.isCForbiddenLValueType()" , "clang/lib/Sema/SemaExpr.cpp", 5839, __extension__ __PRETTY_FUNCTION__ )); | |||
5840 | ||||
5841 | if (LHSExp->IgnoreParenImpCasts()->getType()->isVariablyModifiedType() && | |||
5842 | FunctionScopes.size() > 1) { | |||
5843 | if (auto *TT = | |||
5844 | LHSExp->IgnoreParenImpCasts()->getType()->getAs<TypedefType>()) { | |||
5845 | for (auto I = FunctionScopes.rbegin(), | |||
5846 | E = std::prev(FunctionScopes.rend()); | |||
5847 | I != E; ++I) { | |||
5848 | auto *CSI = dyn_cast<CapturingScopeInfo>(*I); | |||
5849 | if (CSI == nullptr) | |||
5850 | break; | |||
5851 | DeclContext *DC = nullptr; | |||
5852 | if (auto *LSI = dyn_cast<LambdaScopeInfo>(CSI)) | |||
5853 | DC = LSI->CallOperator; | |||
5854 | else if (auto *CRSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) | |||
5855 | DC = CRSI->TheCapturedDecl; | |||
5856 | else if (auto *BSI = dyn_cast<BlockScopeInfo>(CSI)) | |||
5857 | DC = BSI->TheDecl; | |||
5858 | if (DC) { | |||
5859 | if (DC->containsDecl(TT->getDecl())) | |||
5860 | break; | |||
5861 | captureVariablyModifiedType( | |||
5862 | Context, LHSExp->IgnoreParenImpCasts()->getType(), CSI); | |||
5863 | } | |||
5864 | } | |||
5865 | } | |||
5866 | } | |||
5867 | ||||
5868 | return new (Context) | |||
5869 | ArraySubscriptExpr(LHSExp, RHSExp, ResultType, VK, OK, RLoc); | |||
5870 | } | |||
5871 | ||||
5872 | bool Sema::CheckCXXDefaultArgExpr(SourceLocation CallLoc, FunctionDecl *FD, | |||
5873 | ParmVarDecl *Param, Expr *RewrittenInit, | |||
5874 | bool SkipImmediateInvocations) { | |||
5875 | if (Param->hasUnparsedDefaultArg()) { | |||
5876 | assert(!RewrittenInit && "Should not have a rewritten init expression yet")(static_cast <bool> (!RewrittenInit && "Should not have a rewritten init expression yet" ) ? void (0) : __assert_fail ("!RewrittenInit && \"Should not have a rewritten init expression yet\"" , "clang/lib/Sema/SemaExpr.cpp", 5876, __extension__ __PRETTY_FUNCTION__ )); | |||
5877 | // If we've already cleared out the location for the default argument, | |||
5878 | // that means we're parsing it right now. | |||
5879 | if (!UnparsedDefaultArgLocs.count(Param)) { | |||
5880 | Diag(Param->getBeginLoc(), diag::err_recursive_default_argument) << FD; | |||
5881 | Diag(CallLoc, diag::note_recursive_default_argument_used_here); | |||
5882 | Param->setInvalidDecl(); | |||
5883 | return true; | |||
5884 | } | |||
5885 | ||||
5886 | Diag(CallLoc, diag::err_use_of_default_argument_to_function_declared_later) | |||
5887 | << FD << cast<CXXRecordDecl>(FD->getDeclContext()); | |||
5888 | Diag(UnparsedDefaultArgLocs[Param], | |||
5889 | diag::note_default_argument_declared_here); | |||
5890 | return true; | |||
5891 | } | |||
5892 | ||||
5893 | if (Param->hasUninstantiatedDefaultArg()) { | |||
5894 | assert(!RewrittenInit && "Should not have a rewitten init expression yet")(static_cast <bool> (!RewrittenInit && "Should not have a rewitten init expression yet" ) ? void (0) : __assert_fail ("!RewrittenInit && \"Should not have a rewitten init expression yet\"" , "clang/lib/Sema/SemaExpr.cpp", 5894, __extension__ __PRETTY_FUNCTION__ )); | |||
5895 | if (InstantiateDefaultArgument(CallLoc, FD, Param)) | |||
5896 | return true; | |||
5897 | } | |||
5898 | ||||
5899 | Expr *Init = RewrittenInit ? RewrittenInit : Param->getInit(); | |||
5900 | assert(Init && "default argument but no initializer?")(static_cast <bool> (Init && "default argument but no initializer?" ) ? void (0) : __assert_fail ("Init && \"default argument but no initializer?\"" , "clang/lib/Sema/SemaExpr.cpp", 5900, __extension__ __PRETTY_FUNCTION__ )); | |||
5901 | ||||
5902 | // If the default expression creates temporaries, we need to | |||
5903 | // push them to the current stack of expression temporaries so they'll | |||
5904 | // be properly destroyed. | |||
5905 | // FIXME: We should really be rebuilding the default argument with new | |||
5906 | // bound temporaries; see the comment in PR5810. | |||
5907 | // We don't need to do that with block decls, though, because | |||
5908 | // blocks in default argument expression can never capture anything. | |||
5909 | if (auto *InitWithCleanup = dyn_cast<ExprWithCleanups>(Init)) { | |||
5910 | // Set the "needs cleanups" bit regardless of whether there are | |||
5911 | // any explicit objects. | |||
5912 | Cleanup.setExprNeedsCleanups(InitWithCleanup->cleanupsHaveSideEffects()); | |||
5913 | // Append all the objects to the cleanup list. Right now, this | |||
5914 | // should always be a no-op, because blocks in default argument | |||
5915 | // expressions should never be able to capture anything. | |||
5916 | assert(!InitWithCleanup->getNumObjects() &&(static_cast <bool> (!InitWithCleanup->getNumObjects () && "default argument expression has capturing blocks?" ) ? void (0) : __assert_fail ("!InitWithCleanup->getNumObjects() && \"default argument expression has capturing blocks?\"" , "clang/lib/Sema/SemaExpr.cpp", 5917, __extension__ __PRETTY_FUNCTION__ )) | |||
5917 | "default argument expression has capturing blocks?")(static_cast <bool> (!InitWithCleanup->getNumObjects () && "default argument expression has capturing blocks?" ) ? void (0) : __assert_fail ("!InitWithCleanup->getNumObjects() && \"default argument expression has capturing blocks?\"" , "clang/lib/Sema/SemaExpr.cpp", 5917, __extension__ __PRETTY_FUNCTION__ )); | |||
5918 | } | |||
5919 | // C++ [expr.const]p15.1: | |||
5920 | // An expression or conversion is in an immediate function context if it is | |||
5921 | // potentially evaluated and [...] its innermost enclosing non-block scope | |||
5922 | // is a function parameter scope of an immediate function. | |||
5923 | EnterExpressionEvaluationContext EvalContext( | |||
5924 | *this, | |||
5925 | FD->isConsteval() ? ExpressionEvaluationContext::ImmediateFunctionContext | |||
5926 | : ExpressionEvaluationContext::PotentiallyEvaluated, | |||
5927 | Param); | |||
5928 | ExprEvalContexts.back().IsCurrentlyCheckingDefaultArgumentOrInitializer = | |||
5929 | SkipImmediateInvocations; | |||
5930 | runWithSufficientStackSpace(CallLoc, [&] { | |||
5931 | MarkDeclarationsReferencedInExpr(Init, /*SkipLocalVariables=*/true); | |||
5932 | }); | |||
5933 | return false; | |||
5934 | } | |||
5935 | ||||
5936 | struct ImmediateCallVisitor : public RecursiveASTVisitor<ImmediateCallVisitor> { | |||
5937 | bool HasImmediateCalls = false; | |||
5938 | ||||
5939 | bool shouldVisitImplicitCode() const { return true; } | |||
5940 | ||||
5941 | bool VisitCallExpr(CallExpr *E) { | |||
5942 | if (const FunctionDecl *FD = E->getDirectCallee()) | |||
5943 | HasImmediateCalls |= FD->isConsteval(); | |||
5944 | return RecursiveASTVisitor<ImmediateCallVisitor>::VisitStmt(E); | |||
5945 | } | |||
5946 | ||||
5947 | // SourceLocExpr are not immediate invocations | |||
5948 | // but CXXDefaultInitExpr/CXXDefaultArgExpr containing a SourceLocExpr | |||
5949 | // need to be rebuilt so that they refer to the correct SourceLocation and | |||
5950 | // DeclContext. | |||
5951 | bool VisitSourceLocExpr(SourceLocExpr *E) { | |||
5952 | HasImmediateCalls = true; | |||
5953 | return RecursiveASTVisitor<ImmediateCallVisitor>::VisitStmt(E); | |||
5954 | } | |||
5955 | ||||
5956 | // A nested lambda might have parameters with immediate invocations | |||
5957 | // in their default arguments. | |||
5958 | // The compound statement is not visited (as it does not constitute a | |||
5959 | // subexpression). | |||
5960 | // FIXME: We should consider visiting and transforming captures | |||
5961 | // with init expressions. | |||
5962 | bool VisitLambdaExpr(LambdaExpr *E) { | |||
5963 | return VisitCXXMethodDecl(E->getCallOperator()); | |||
5964 | } | |||
5965 | ||||
5966 | // Blocks don't support default parameters, and, as for lambdas, | |||
5967 | // we don't consider their body a subexpression. | |||
5968 | bool VisitBlockDecl(BlockDecl *B) { return false; } | |||
5969 | ||||
5970 | bool VisitCompoundStmt(CompoundStmt *B) { return false; } | |||
5971 | ||||
5972 | bool VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) { | |||
5973 | return TraverseStmt(E->getExpr()); | |||
5974 | } | |||
5975 | ||||
5976 | bool VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) { | |||
5977 | return TraverseStmt(E->getExpr()); | |||
5978 | } | |||
5979 | }; | |||
5980 | ||||
5981 | struct EnsureImmediateInvocationInDefaultArgs | |||
5982 | : TreeTransform<EnsureImmediateInvocationInDefaultArgs> { | |||
5983 | EnsureImmediateInvocationInDefaultArgs(Sema &SemaRef) | |||
5984 | : TreeTransform(SemaRef) {} | |||
5985 | ||||
5986 | // Lambda can only have immediate invocations in the default | |||
5987 | // args of their parameters, which is transformed upon calling the closure. | |||
5988 | // The body is not a subexpression, so we have nothing to do. | |||
5989 | // FIXME: Immediate calls in capture initializers should be transformed. | |||
5990 | ExprResult TransformLambdaExpr(LambdaExpr *E) { return E; } | |||
5991 | ExprResult TransformBlockExpr(BlockExpr *E) { return E; } | |||
5992 | ||||
5993 | // Make sure we don't rebuild the this pointer as it would | |||
5994 | // cause it to incorrectly point it to the outermost class | |||
5995 | // in the case of nested struct initialization. | |||
5996 | ExprResult TransformCXXThisExpr(CXXThisExpr *E) { return E; } | |||
5997 | }; | |||
5998 | ||||
5999 | ExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc, | |||
6000 | FunctionDecl *FD, ParmVarDecl *Param, | |||
6001 | Expr *Init) { | |||
6002 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 6002, __extension__ __PRETTY_FUNCTION__ )); | |||
6003 | ||||
6004 | bool NestedDefaultChecking = isCheckingDefaultArgumentOrInitializer(); | |||
6005 | ||||
6006 | std::optional<ExpressionEvaluationContextRecord::InitializationContext> | |||
6007 | InitializationContext = | |||
6008 | OutermostDeclarationWithDelayedImmediateInvocations(); | |||
6009 | if (!InitializationContext.has_value()) | |||
6010 | InitializationContext.emplace(CallLoc, Param, CurContext); | |||
6011 | ||||
6012 | if (!Init && !Param->hasUnparsedDefaultArg()) { | |||
6013 | // Mark that we are replacing a default argument first. | |||
6014 | // If we are instantiating a template we won't have to | |||
6015 | // retransform immediate calls. | |||
6016 | // C++ [expr.const]p15.1: | |||
6017 | // An expression or conversion is in an immediate function context if it | |||
6018 | // is potentially evaluated and [...] its innermost enclosing non-block | |||
6019 | // scope is a function parameter scope of an immediate function. | |||
6020 | EnterExpressionEvaluationContext EvalContext( | |||
6021 | *this, | |||
6022 | FD->isConsteval() | |||
6023 | ? ExpressionEvaluationContext::ImmediateFunctionContext | |||
6024 | : ExpressionEvaluationContext::PotentiallyEvaluated, | |||
6025 | Param); | |||
6026 | ||||
6027 | if (Param->hasUninstantiatedDefaultArg()) { | |||
6028 | if (InstantiateDefaultArgument(CallLoc, FD, Param)) | |||
6029 | return ExprError(); | |||
6030 | } | |||
6031 | // CWG2631 | |||
6032 | // An immediate invocation that is not evaluated where it appears is | |||
6033 | // evaluated and checked for whether it is a constant expression at the | |||
6034 | // point where the enclosing initializer is used in a function call. | |||
6035 | ImmediateCallVisitor V; | |||
6036 | if (!NestedDefaultChecking) | |||
6037 | V.TraverseDecl(Param); | |||
6038 | if (V.HasImmediateCalls) { | |||
6039 | ExprEvalContexts.back().DelayedDefaultInitializationContext = { | |||
6040 | CallLoc, Param, CurContext}; | |||
6041 | EnsureImmediateInvocationInDefaultArgs Immediate(*this); | |||
6042 | ExprResult Res; | |||
6043 | runWithSufficientStackSpace(CallLoc, [&] { | |||
6044 | Res = Immediate.TransformInitializer(Param->getInit(), | |||
6045 | /*NotCopy=*/false); | |||
6046 | }); | |||
6047 | if (Res.isInvalid()) | |||
6048 | return ExprError(); | |||
6049 | Res = ConvertParamDefaultArgument(Param, Res.get(), | |||
6050 | Res.get()->getBeginLoc()); | |||
6051 | if (Res.isInvalid()) | |||
6052 | return ExprError(); | |||
6053 | Init = Res.get(); | |||
6054 | } | |||
6055 | } | |||
6056 | ||||
6057 | if (CheckCXXDefaultArgExpr( | |||
6058 | CallLoc, FD, Param, Init, | |||
6059 | /*SkipImmediateInvocations=*/NestedDefaultChecking)) | |||
6060 | return ExprError(); | |||
6061 | ||||
6062 | return CXXDefaultArgExpr::Create(Context, InitializationContext->Loc, Param, | |||
6063 | Init, InitializationContext->Context); | |||
6064 | } | |||
6065 | ||||
6066 | ExprResult Sema::BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field) { | |||
6067 | assert(Field->hasInClassInitializer())(static_cast <bool> (Field->hasInClassInitializer()) ? void (0) : __assert_fail ("Field->hasInClassInitializer()" , "clang/lib/Sema/SemaExpr.cpp", 6067, __extension__ __PRETTY_FUNCTION__ )); | |||
6068 | ||||
6069 | // If we might have already tried and failed to instantiate, don't try again. | |||
6070 | if (Field->isInvalidDecl()) | |||
6071 | return ExprError(); | |||
6072 | ||||
6073 | auto *ParentRD = cast<CXXRecordDecl>(Field->getParent()); | |||
6074 | ||||
6075 | std::optional<ExpressionEvaluationContextRecord::InitializationContext> | |||
6076 | InitializationContext = | |||
6077 | OutermostDeclarationWithDelayedImmediateInvocations(); | |||
6078 | if (!InitializationContext.has_value()) | |||
6079 | InitializationContext.emplace(Loc, Field, CurContext); | |||
6080 | ||||
6081 | Expr *Init = nullptr; | |||
6082 | ||||
6083 | bool NestedDefaultChecking = isCheckingDefaultArgumentOrInitializer(); | |||
6084 | ||||
6085 | EnterExpressionEvaluationContext EvalContext( | |||
6086 | *this, ExpressionEvaluationContext::PotentiallyEvaluated, Field); | |||
6087 | ||||
6088 | if (!Field->getInClassInitializer()) { | |||
6089 | // Maybe we haven't instantiated the in-class initializer. Go check the | |||
6090 | // pattern FieldDecl to see if it has one. | |||
6091 | if (isTemplateInstantiation(ParentRD->getTemplateSpecializationKind())) { | |||
6092 | CXXRecordDecl *ClassPattern = ParentRD->getTemplateInstantiationPattern(); | |||
6093 | DeclContext::lookup_result Lookup = | |||
6094 | ClassPattern->lookup(Field->getDeclName()); | |||
6095 | ||||
6096 | FieldDecl *Pattern = nullptr; | |||
6097 | for (auto *L : Lookup) { | |||
6098 | if ((Pattern = dyn_cast<FieldDecl>(L))) | |||
6099 | break; | |||
6100 | } | |||
6101 | assert(Pattern && "We must have set the Pattern!")(static_cast <bool> (Pattern && "We must have set the Pattern!" ) ? void (0) : __assert_fail ("Pattern && \"We must have set the Pattern!\"" , "clang/lib/Sema/SemaExpr.cpp", 6101, __extension__ __PRETTY_FUNCTION__ )); | |||
6102 | if (!Pattern->hasInClassInitializer() || | |||
6103 | InstantiateInClassInitializer(Loc, Field, Pattern, | |||
6104 | getTemplateInstantiationArgs(Field))) { | |||
6105 | Field->setInvalidDecl(); | |||
6106 | return ExprError(); | |||
6107 | } | |||
6108 | } | |||
6109 | } | |||
6110 | ||||
6111 | // CWG2631 | |||
6112 | // An immediate invocation that is not evaluated where it appears is | |||
6113 | // evaluated and checked for whether it is a constant expression at the | |||
6114 | // point where the enclosing initializer is used in a [...] a constructor | |||
6115 | // definition, or an aggregate initialization. | |||
6116 | ImmediateCallVisitor V; | |||
6117 | if (!NestedDefaultChecking) | |||
6118 | V.TraverseDecl(Field); | |||
6119 | if (V.HasImmediateCalls) { | |||
6120 | ExprEvalContexts.back().DelayedDefaultInitializationContext = {Loc, Field, | |||
6121 | CurContext}; | |||
6122 | ExprEvalContexts.back().IsCurrentlyCheckingDefaultArgumentOrInitializer = | |||
6123 | NestedDefaultChecking; | |||
6124 | ||||
6125 | EnsureImmediateInvocationInDefaultArgs Immediate(*this); | |||
6126 | ExprResult Res; | |||
6127 | runWithSufficientStackSpace(Loc, [&] { | |||
6128 | Res = Immediate.TransformInitializer(Field->getInClassInitializer(), | |||
6129 | /*CXXDirectInit=*/false); | |||
6130 | }); | |||
6131 | if (!Res.isInvalid()) | |||
6132 | Res = ConvertMemberDefaultInitExpression(Field, Res.get(), Loc); | |||
6133 | if (Res.isInvalid()) { | |||
6134 | Field->setInvalidDecl(); | |||
6135 | return ExprError(); | |||
6136 | } | |||
6137 | Init = Res.get(); | |||
6138 | } | |||
6139 | ||||
6140 | if (Field->getInClassInitializer()) { | |||
6141 | Expr *E = Init ? Init : Field->getInClassInitializer(); | |||
6142 | if (!NestedDefaultChecking) | |||
6143 | runWithSufficientStackSpace(Loc, [&] { | |||
6144 | MarkDeclarationsReferencedInExpr(E, /*SkipLocalVariables=*/false); | |||
6145 | }); | |||
6146 | // C++11 [class.base.init]p7: | |||
6147 | // The initialization of each base and member constitutes a | |||
6148 | // full-expression. | |||
6149 | ExprResult Res = ActOnFinishFullExpr(E, /*DiscardedValue=*/false); | |||
6150 | if (Res.isInvalid()) { | |||
6151 | Field->setInvalidDecl(); | |||
6152 | return ExprError(); | |||
6153 | } | |||
6154 | Init = Res.get(); | |||
6155 | ||||
6156 | return CXXDefaultInitExpr::Create(Context, InitializationContext->Loc, | |||
6157 | Field, InitializationContext->Context, | |||
6158 | Init); | |||
6159 | } | |||
6160 | ||||
6161 | // DR1351: | |||
6162 | // If the brace-or-equal-initializer of a non-static data member | |||
6163 | // invokes a defaulted default constructor of its class or of an | |||
6164 | // enclosing class in a potentially evaluated subexpression, the | |||
6165 | // program is ill-formed. | |||
6166 | // | |||
6167 | // This resolution is unworkable: the exception specification of the | |||
6168 | // default constructor can be needed in an unevaluated context, in | |||
6169 | // particular, in the operand of a noexcept-expression, and we can be | |||
6170 | // unable to compute an exception specification for an enclosed class. | |||
6171 | // | |||
6172 | // Any attempt to resolve the exception specification of a defaulted default | |||
6173 | // constructor before the initializer is lexically complete will ultimately | |||
6174 | // come here at which point we can diagnose it. | |||
6175 | RecordDecl *OutermostClass = ParentRD->getOuterLexicalRecordContext(); | |||
6176 | Diag(Loc, diag::err_default_member_initializer_not_yet_parsed) | |||
6177 | << OutermostClass << Field; | |||
6178 | Diag(Field->getEndLoc(), | |||
6179 | diag::note_default_member_initializer_not_yet_parsed); | |||
6180 | // Recover by marking the field invalid, unless we're in a SFINAE context. | |||
6181 | if (!isSFINAEContext()) | |||
6182 | Field->setInvalidDecl(); | |||
6183 | return ExprError(); | |||
6184 | } | |||
6185 | ||||
6186 | Sema::VariadicCallType | |||
6187 | Sema::getVariadicCallType(FunctionDecl *FDecl, const FunctionProtoType *Proto, | |||
6188 | Expr *Fn) { | |||
6189 | if (Proto && Proto->isVariadic()) { | |||
6190 | if (isa_and_nonnull<CXXConstructorDecl>(FDecl)) | |||
6191 | return VariadicConstructor; | |||
6192 | else if (Fn && Fn->getType()->isBlockPointerType()) | |||
6193 | return VariadicBlock; | |||
6194 | else if (FDecl) { | |||
6195 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl)) | |||
6196 | if (Method->isInstance()) | |||
6197 | return VariadicMethod; | |||
6198 | } else if (Fn && Fn->getType() == Context.BoundMemberTy) | |||
6199 | return VariadicMethod; | |||
6200 | return VariadicFunction; | |||
6201 | } | |||
6202 | return VariadicDoesNotApply; | |||
6203 | } | |||
6204 | ||||
6205 | namespace { | |||
6206 | class FunctionCallCCC final : public FunctionCallFilterCCC { | |||
6207 | public: | |||
6208 | FunctionCallCCC(Sema &SemaRef, const IdentifierInfo *FuncName, | |||
6209 | unsigned NumArgs, MemberExpr *ME) | |||
6210 | : FunctionCallFilterCCC(SemaRef, NumArgs, false, ME), | |||
6211 | FunctionName(FuncName) {} | |||
6212 | ||||
6213 | bool ValidateCandidate(const TypoCorrection &candidate) override { | |||
6214 | if (!candidate.getCorrectionSpecifier() || | |||
6215 | candidate.getCorrectionAsIdentifierInfo() != FunctionName) { | |||
6216 | return false; | |||
6217 | } | |||
6218 | ||||
6219 | return FunctionCallFilterCCC::ValidateCandidate(candidate); | |||
6220 | } | |||
6221 | ||||
6222 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | |||
6223 | return std::make_unique<FunctionCallCCC>(*this); | |||
6224 | } | |||
6225 | ||||
6226 | private: | |||
6227 | const IdentifierInfo *const FunctionName; | |||
6228 | }; | |||
6229 | } | |||
6230 | ||||
6231 | static TypoCorrection TryTypoCorrectionForCall(Sema &S, Expr *Fn, | |||
6232 | FunctionDecl *FDecl, | |||
6233 | ArrayRef<Expr *> Args) { | |||
6234 | MemberExpr *ME = dyn_cast<MemberExpr>(Fn); | |||
6235 | DeclarationName FuncName = FDecl->getDeclName(); | |||
6236 | SourceLocation NameLoc = ME ? ME->getMemberLoc() : Fn->getBeginLoc(); | |||
6237 | ||||
6238 | FunctionCallCCC CCC(S, FuncName.getAsIdentifierInfo(), Args.size(), ME); | |||
6239 | if (TypoCorrection Corrected = S.CorrectTypo( | |||
6240 | DeclarationNameInfo(FuncName, NameLoc), Sema::LookupOrdinaryName, | |||
6241 | S.getScopeForContext(S.CurContext), nullptr, CCC, | |||
6242 | Sema::CTK_ErrorRecovery)) { | |||
6243 | if (NamedDecl *ND = Corrected.getFoundDecl()) { | |||
6244 | if (Corrected.isOverloaded()) { | |||
6245 | OverloadCandidateSet OCS(NameLoc, OverloadCandidateSet::CSK_Normal); | |||
6246 | OverloadCandidateSet::iterator Best; | |||
6247 | for (NamedDecl *CD : Corrected) { | |||
6248 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(CD)) | |||
6249 | S.AddOverloadCandidate(FD, DeclAccessPair::make(FD, AS_none), Args, | |||
6250 | OCS); | |||
6251 | } | |||
6252 | switch (OCS.BestViableFunction(S, NameLoc, Best)) { | |||
6253 | case OR_Success: | |||
6254 | ND = Best->FoundDecl; | |||
6255 | Corrected.setCorrectionDecl(ND); | |||
6256 | break; | |||
6257 | default: | |||
6258 | break; | |||
6259 | } | |||
6260 | } | |||
6261 | ND = ND->getUnderlyingDecl(); | |||
6262 | if (isa<ValueDecl>(ND) || isa<FunctionTemplateDecl>(ND)) | |||
6263 | return Corrected; | |||
6264 | } | |||
6265 | } | |||
6266 | return TypoCorrection(); | |||
6267 | } | |||
6268 | ||||
6269 | /// ConvertArgumentsForCall - Converts the arguments specified in | |||
6270 | /// Args/NumArgs to the parameter types of the function FDecl with | |||
6271 | /// function prototype Proto. Call is the call expression itself, and | |||
6272 | /// Fn is the function expression. For a C++ member function, this | |||
6273 | /// routine does not attempt to convert the object argument. Returns | |||
6274 | /// true if the call is ill-formed. | |||
6275 | bool | |||
6276 | Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, | |||
6277 | FunctionDecl *FDecl, | |||
6278 | const FunctionProtoType *Proto, | |||
6279 | ArrayRef<Expr *> Args, | |||
6280 | SourceLocation RParenLoc, | |||
6281 | bool IsExecConfig) { | |||
6282 | // Bail out early if calling a builtin with custom typechecking. | |||
6283 | if (FDecl) | |||
6284 | if (unsigned ID = FDecl->getBuiltinID()) | |||
6285 | if (Context.BuiltinInfo.hasCustomTypechecking(ID)) | |||
6286 | return false; | |||
6287 | ||||
6288 | // C99 6.5.2.2p7 - the arguments are implicitly converted, as if by | |||
6289 | // assignment, to the types of the corresponding parameter, ... | |||
6290 | unsigned NumParams = Proto->getNumParams(); | |||
6291 | bool Invalid = false; | |||
6292 | unsigned MinArgs = FDecl ? FDecl->getMinRequiredArguments() : NumParams; | |||
6293 | unsigned FnKind = Fn->getType()->isBlockPointerType() | |||
6294 | ? 1 /* block */ | |||
6295 | : (IsExecConfig ? 3 /* kernel function (exec config) */ | |||
6296 | : 0 /* function */); | |||
6297 | ||||
6298 | // If too few arguments are available (and we don't have default | |||
6299 | // arguments for the remaining parameters), don't make the call. | |||
6300 | if (Args.size() < NumParams) { | |||
6301 | if (Args.size() < MinArgs) { | |||
6302 | TypoCorrection TC; | |||
6303 | if (FDecl && (TC = TryTypoCorrectionForCall(*this, Fn, FDecl, Args))) { | |||
6304 | unsigned diag_id = | |||
6305 | MinArgs == NumParams && !Proto->isVariadic() | |||
6306 | ? diag::err_typecheck_call_too_few_args_suggest | |||
6307 | : diag::err_typecheck_call_too_few_args_at_least_suggest; | |||
6308 | diagnoseTypo(TC, PDiag(diag_id) << FnKind << MinArgs | |||
6309 | << static_cast<unsigned>(Args.size()) | |||
6310 | << TC.getCorrectionRange()); | |||
6311 | } else if (MinArgs == 1 && FDecl && FDecl->getParamDecl(0)->getDeclName()) | |||
6312 | Diag(RParenLoc, | |||
6313 | MinArgs == NumParams && !Proto->isVariadic() | |||
6314 | ? diag::err_typecheck_call_too_few_args_one | |||
6315 | : diag::err_typecheck_call_too_few_args_at_least_one) | |||
6316 | << FnKind << FDecl->getParamDecl(0) << Fn->getSourceRange(); | |||
6317 | else | |||
6318 | Diag(RParenLoc, MinArgs == NumParams && !Proto->isVariadic() | |||
6319 | ? diag::err_typecheck_call_too_few_args | |||
6320 | : diag::err_typecheck_call_too_few_args_at_least) | |||
6321 | << FnKind << MinArgs << static_cast<unsigned>(Args.size()) | |||
6322 | << Fn->getSourceRange(); | |||
6323 | ||||
6324 | // Emit the location of the prototype. | |||
6325 | if (!TC && FDecl && !FDecl->getBuiltinID() && !IsExecConfig) | |||
6326 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
6327 | ||||
6328 | return true; | |||
6329 | } | |||
6330 | // We reserve space for the default arguments when we create | |||
6331 | // the call expression, before calling ConvertArgumentsForCall. | |||
6332 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 6333, __extension__ __PRETTY_FUNCTION__ )) | |||
6333 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 6333, __extension__ __PRETTY_FUNCTION__ )); | |||
6334 | } | |||
6335 | ||||
6336 | // If too many are passed and not variadic, error on the extras and drop | |||
6337 | // them. | |||
6338 | if (Args.size() > NumParams) { | |||
6339 | if (!Proto->isVariadic()) { | |||
6340 | TypoCorrection TC; | |||
6341 | if (FDecl && (TC = TryTypoCorrectionForCall(*this, Fn, FDecl, Args))) { | |||
6342 | unsigned diag_id = | |||
6343 | MinArgs == NumParams && !Proto->isVariadic() | |||
6344 | ? diag::err_typecheck_call_too_many_args_suggest | |||
6345 | : diag::err_typecheck_call_too_many_args_at_most_suggest; | |||
6346 | diagnoseTypo(TC, PDiag(diag_id) << FnKind << NumParams | |||
6347 | << static_cast<unsigned>(Args.size()) | |||
6348 | << TC.getCorrectionRange()); | |||
6349 | } else if (NumParams == 1 && FDecl && | |||
6350 | FDecl->getParamDecl(0)->getDeclName()) | |||
6351 | Diag(Args[NumParams]->getBeginLoc(), | |||
6352 | MinArgs == NumParams | |||
6353 | ? diag::err_typecheck_call_too_many_args_one | |||
6354 | : diag::err_typecheck_call_too_many_args_at_most_one) | |||
6355 | << FnKind << FDecl->getParamDecl(0) | |||
6356 | << static_cast<unsigned>(Args.size()) << Fn->getSourceRange() | |||
6357 | << SourceRange(Args[NumParams]->getBeginLoc(), | |||
6358 | Args.back()->getEndLoc()); | |||
6359 | else | |||
6360 | Diag(Args[NumParams]->getBeginLoc(), | |||
6361 | MinArgs == NumParams | |||
6362 | ? diag::err_typecheck_call_too_many_args | |||
6363 | : diag::err_typecheck_call_too_many_args_at_most) | |||
6364 | << FnKind << NumParams << static_cast<unsigned>(Args.size()) | |||
6365 | << Fn->getSourceRange() | |||
6366 | << SourceRange(Args[NumParams]->getBeginLoc(), | |||
6367 | Args.back()->getEndLoc()); | |||
6368 | ||||
6369 | // Emit the location of the prototype. | |||
6370 | if (!TC && FDecl && !FDecl->getBuiltinID() && !IsExecConfig) | |||
6371 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
6372 | ||||
6373 | // This deletes the extra arguments. | |||
6374 | Call->shrinkNumArgs(NumParams); | |||
6375 | return true; | |||
6376 | } | |||
6377 | } | |||
6378 | SmallVector<Expr *, 8> AllArgs; | |||
6379 | VariadicCallType CallType = getVariadicCallType(FDecl, Proto, Fn); | |||
6380 | ||||
6381 | Invalid = GatherArgumentsForCall(Call->getBeginLoc(), FDecl, Proto, 0, Args, | |||
6382 | AllArgs, CallType); | |||
6383 | if (Invalid) | |||
6384 | return true; | |||
6385 | unsigned TotalNumArgs = AllArgs.size(); | |||
6386 | for (unsigned i = 0; i < TotalNumArgs; ++i) | |||
6387 | Call->setArg(i, AllArgs[i]); | |||
6388 | ||||
6389 | Call->computeDependence(); | |||
6390 | return false; | |||
6391 | } | |||
6392 | ||||
6393 | bool Sema::GatherArgumentsForCall(SourceLocation CallLoc, FunctionDecl *FDecl, | |||
6394 | const FunctionProtoType *Proto, | |||
6395 | unsigned FirstParam, ArrayRef<Expr *> Args, | |||
6396 | SmallVectorImpl<Expr *> &AllArgs, | |||
6397 | VariadicCallType CallType, bool AllowExplicit, | |||
6398 | bool IsListInitialization) { | |||
6399 | unsigned NumParams = Proto->getNumParams(); | |||
6400 | bool Invalid = false; | |||
6401 | size_t ArgIx = 0; | |||
6402 | // Continue to check argument types (even if we have too few/many args). | |||
6403 | for (unsigned i = FirstParam; i < NumParams; i++) { | |||
6404 | QualType ProtoArgType = Proto->getParamType(i); | |||
6405 | ||||
6406 | Expr *Arg; | |||
6407 | ParmVarDecl *Param = FDecl ? FDecl->getParamDecl(i) : nullptr; | |||
6408 | if (ArgIx < Args.size()) { | |||
6409 | Arg = Args[ArgIx++]; | |||
6410 | ||||
6411 | if (RequireCompleteType(Arg->getBeginLoc(), ProtoArgType, | |||
6412 | diag::err_call_incomplete_argument, Arg)) | |||
6413 | return true; | |||
6414 | ||||
6415 | // Strip the unbridged-cast placeholder expression off, if applicable. | |||
6416 | bool CFAudited = false; | |||
6417 | if (Arg->getType() == Context.ARCUnbridgedCastTy && | |||
6418 | FDecl && FDecl->hasAttr<CFAuditedTransferAttr>() && | |||
6419 | (!Param || !Param->hasAttr<CFConsumedAttr>())) | |||
6420 | Arg = stripARCUnbridgedCast(Arg); | |||
6421 | else if (getLangOpts().ObjCAutoRefCount && | |||
6422 | FDecl && FDecl->hasAttr<CFAuditedTransferAttr>() && | |||
6423 | (!Param || !Param->hasAttr<CFConsumedAttr>())) | |||
6424 | CFAudited = true; | |||
6425 | ||||
6426 | if (Proto->getExtParameterInfo(i).isNoEscape() && | |||
6427 | ProtoArgType->isBlockPointerType()) | |||
6428 | if (auto *BE = dyn_cast<BlockExpr>(Arg->IgnoreParenNoopCasts(Context))) | |||
6429 | BE->getBlockDecl()->setDoesNotEscape(); | |||
6430 | ||||
6431 | InitializedEntity Entity = | |||
6432 | Param ? InitializedEntity::InitializeParameter(Context, Param, | |||
6433 | ProtoArgType) | |||
6434 | : InitializedEntity::InitializeParameter( | |||
6435 | Context, ProtoArgType, Proto->isParamConsumed(i)); | |||
6436 | ||||
6437 | // Remember that parameter belongs to a CF audited API. | |||
6438 | if (CFAudited) | |||
6439 | Entity.setParameterCFAudited(); | |||
6440 | ||||
6441 | ExprResult ArgE = PerformCopyInitialization( | |||
6442 | Entity, SourceLocation(), Arg, IsListInitialization, AllowExplicit); | |||
6443 | if (ArgE.isInvalid()) | |||
6444 | return true; | |||
6445 | ||||
6446 | Arg = ArgE.getAs<Expr>(); | |||
6447 | } else { | |||
6448 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 6448, __extension__ __PRETTY_FUNCTION__ )); | |||
6449 | ||||
6450 | ExprResult ArgExpr = BuildCXXDefaultArgExpr(CallLoc, FDecl, Param); | |||
6451 | if (ArgExpr.isInvalid()) | |||
6452 | return true; | |||
6453 | ||||
6454 | Arg = ArgExpr.getAs<Expr>(); | |||
6455 | } | |||
6456 | ||||
6457 | // Check for array bounds violations for each argument to the call. This | |||
6458 | // check only triggers warnings when the argument isn't a more complex Expr | |||
6459 | // with its own checking, such as a BinaryOperator. | |||
6460 | CheckArrayAccess(Arg); | |||
6461 | ||||
6462 | // Check for violations of C99 static array rules (C99 6.7.5.3p7). | |||
6463 | CheckStaticArrayArgument(CallLoc, Param, Arg); | |||
6464 | ||||
6465 | AllArgs.push_back(Arg); | |||
6466 | } | |||
6467 | ||||
6468 | // If this is a variadic call, handle args passed through "...". | |||
6469 | if (CallType != VariadicDoesNotApply) { | |||
6470 | // Assume that extern "C" functions with variadic arguments that | |||
6471 | // return __unknown_anytype aren't *really* variadic. | |||
6472 | if (Proto->getReturnType() == Context.UnknownAnyTy && FDecl && | |||
6473 | FDecl->isExternC()) { | |||
6474 | for (Expr *A : Args.slice(ArgIx)) { | |||
6475 | QualType paramType; // ignored | |||
6476 | ExprResult arg = checkUnknownAnyArg(CallLoc, A, paramType); | |||
6477 | Invalid |= arg.isInvalid(); | |||
6478 | AllArgs.push_back(arg.get()); | |||
6479 | } | |||
6480 | ||||
6481 | // Otherwise do argument promotion, (C99 6.5.2.2p7). | |||
6482 | } else { | |||
6483 | for (Expr *A : Args.slice(ArgIx)) { | |||
6484 | ExprResult Arg = DefaultVariadicArgumentPromotion(A, CallType, FDecl); | |||
6485 | Invalid |= Arg.isInvalid(); | |||
6486 | AllArgs.push_back(Arg.get()); | |||
6487 | } | |||
6488 | } | |||
6489 | ||||
6490 | // Check for array bounds violations. | |||
6491 | for (Expr *A : Args.slice(ArgIx)) | |||
6492 | CheckArrayAccess(A); | |||
6493 | } | |||
6494 | return Invalid; | |||
6495 | } | |||
6496 | ||||
6497 | static void DiagnoseCalleeStaticArrayParam(Sema &S, ParmVarDecl *PVD) { | |||
6498 | TypeLoc TL = PVD->getTypeSourceInfo()->getTypeLoc(); | |||
6499 | if (DecayedTypeLoc DTL = TL.getAs<DecayedTypeLoc>()) | |||
6500 | TL = DTL.getOriginalLoc(); | |||
6501 | if (ArrayTypeLoc ATL = TL.getAs<ArrayTypeLoc>()) | |||
6502 | S.Diag(PVD->getLocation(), diag::note_callee_static_array) | |||
6503 | << ATL.getLocalSourceRange(); | |||
6504 | } | |||
6505 | ||||
6506 | /// CheckStaticArrayArgument - If the given argument corresponds to a static | |||
6507 | /// array parameter, check that it is non-null, and that if it is formed by | |||
6508 | /// array-to-pointer decay, the underlying array is sufficiently large. | |||
6509 | /// | |||
6510 | /// C99 6.7.5.3p7: If the keyword static also appears within the [ and ] of the | |||
6511 | /// array type derivation, then for each call to the function, the value of the | |||
6512 | /// corresponding actual argument shall provide access to the first element of | |||
6513 | /// an array with at least as many elements as specified by the size expression. | |||
6514 | void | |||
6515 | Sema::CheckStaticArrayArgument(SourceLocation CallLoc, | |||
6516 | ParmVarDecl *Param, | |||
6517 | const Expr *ArgExpr) { | |||
6518 | // Static array parameters are not supported in C++. | |||
6519 | if (!Param || getLangOpts().CPlusPlus) | |||
6520 | return; | |||
6521 | ||||
6522 | QualType OrigTy = Param->getOriginalType(); | |||
6523 | ||||
6524 | const ArrayType *AT = Context.getAsArrayType(OrigTy); | |||
6525 | if (!AT || AT->getSizeModifier() != ArrayType::Static) | |||
6526 | return; | |||
6527 | ||||
6528 | if (ArgExpr->isNullPointerConstant(Context, | |||
6529 | Expr::NPC_NeverValueDependent)) { | |||
6530 | Diag(CallLoc, diag::warn_null_arg) << ArgExpr->getSourceRange(); | |||
6531 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6532 | return; | |||
6533 | } | |||
6534 | ||||
6535 | const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT); | |||
6536 | if (!CAT) | |||
6537 | return; | |||
6538 | ||||
6539 | const ConstantArrayType *ArgCAT = | |||
6540 | Context.getAsConstantArrayType(ArgExpr->IgnoreParenCasts()->getType()); | |||
6541 | if (!ArgCAT) | |||
6542 | return; | |||
6543 | ||||
6544 | if (getASTContext().hasSameUnqualifiedType(CAT->getElementType(), | |||
6545 | ArgCAT->getElementType())) { | |||
6546 | if (ArgCAT->getSize().ult(CAT->getSize())) { | |||
6547 | Diag(CallLoc, diag::warn_static_array_too_small) | |||
6548 | << ArgExpr->getSourceRange() | |||
6549 | << (unsigned)ArgCAT->getSize().getZExtValue() | |||
6550 | << (unsigned)CAT->getSize().getZExtValue() << 0; | |||
6551 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6552 | } | |||
6553 | return; | |||
6554 | } | |||
6555 | ||||
6556 | std::optional<CharUnits> ArgSize = | |||
6557 | getASTContext().getTypeSizeInCharsIfKnown(ArgCAT); | |||
6558 | std::optional<CharUnits> ParmSize = | |||
6559 | getASTContext().getTypeSizeInCharsIfKnown(CAT); | |||
6560 | if (ArgSize && ParmSize && *ArgSize < *ParmSize) { | |||
6561 | Diag(CallLoc, diag::warn_static_array_too_small) | |||
6562 | << ArgExpr->getSourceRange() << (unsigned)ArgSize->getQuantity() | |||
6563 | << (unsigned)ParmSize->getQuantity() << 1; | |||
6564 | DiagnoseCalleeStaticArrayParam(*this, Param); | |||
6565 | } | |||
6566 | } | |||
6567 | ||||
6568 | /// Given a function expression of unknown-any type, try to rebuild it | |||
6569 | /// to have a function type. | |||
6570 | static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *fn); | |||
6571 | ||||
6572 | /// Is the given type a placeholder that we need to lower out | |||
6573 | /// immediately during argument processing? | |||
6574 | static bool isPlaceholderToRemoveAsArg(QualType type) { | |||
6575 | // Placeholders are never sugared. | |||
6576 | const BuiltinType *placeholder = dyn_cast<BuiltinType>(type); | |||
6577 | if (!placeholder) return false; | |||
6578 | ||||
6579 | switch (placeholder->getKind()) { | |||
6580 | // Ignore all the non-placeholder types. | |||
6581 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
6582 | case BuiltinType::Id: | |||
6583 | #include "clang/Basic/OpenCLImageTypes.def" | |||
6584 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
6585 | case BuiltinType::Id: | |||
6586 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
6587 | // In practice we'll never use this, since all SVE types are sugared | |||
6588 | // via TypedefTypes rather than exposed directly as BuiltinTypes. | |||
6589 | #define SVE_TYPE(Name, Id, SingletonId) \ | |||
6590 | case BuiltinType::Id: | |||
6591 | #include "clang/Basic/AArch64SVEACLETypes.def" | |||
6592 | #define PPC_VECTOR_TYPE(Name, Id, Size) \ | |||
6593 | case BuiltinType::Id: | |||
6594 | #include "clang/Basic/PPCTypes.def" | |||
6595 | #define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
6596 | #include "clang/Basic/RISCVVTypes.def" | |||
6597 | #define WASM_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
6598 | #include "clang/Basic/WebAssemblyReferenceTypes.def" | |||
6599 | #define PLACEHOLDER_TYPE(ID, SINGLETON_ID) | |||
6600 | #define BUILTIN_TYPE(ID, SINGLETON_ID) case BuiltinType::ID: | |||
6601 | #include "clang/AST/BuiltinTypes.def" | |||
6602 | return false; | |||
6603 | ||||
6604 | // We cannot lower out overload sets; they might validly be resolved | |||
6605 | // by the call machinery. | |||
6606 | case BuiltinType::Overload: | |||
6607 | return false; | |||
6608 | ||||
6609 | // Unbridged casts in ARC can be handled in some call positions and | |||
6610 | // should be left in place. | |||
6611 | case BuiltinType::ARCUnbridgedCast: | |||
6612 | return false; | |||
6613 | ||||
6614 | // Pseudo-objects should be converted as soon as possible. | |||
6615 | case BuiltinType::PseudoObject: | |||
6616 | return true; | |||
6617 | ||||
6618 | // The debugger mode could theoretically but currently does not try | |||
6619 | // to resolve unknown-typed arguments based on known parameter types. | |||
6620 | case BuiltinType::UnknownAny: | |||
6621 | return true; | |||
6622 | ||||
6623 | // These are always invalid as call arguments and should be reported. | |||
6624 | case BuiltinType::BoundMember: | |||
6625 | case BuiltinType::BuiltinFn: | |||
6626 | case BuiltinType::IncompleteMatrixIdx: | |||
6627 | case BuiltinType::OMPArraySection: | |||
6628 | case BuiltinType::OMPArrayShaping: | |||
6629 | case BuiltinType::OMPIterator: | |||
6630 | return true; | |||
6631 | ||||
6632 | } | |||
6633 | llvm_unreachable("bad builtin type kind")::llvm::llvm_unreachable_internal("bad builtin type kind", "clang/lib/Sema/SemaExpr.cpp" , 6633); | |||
6634 | } | |||
6635 | ||||
6636 | /// Check an argument list for placeholders that we won't try to | |||
6637 | /// handle later. | |||
6638 | static bool checkArgsForPlaceholders(Sema &S, MultiExprArg args) { | |||
6639 | // Apply this processing to all the arguments at once instead of | |||
6640 | // dying at the first failure. | |||
6641 | bool hasInvalid = false; | |||
6642 | for (size_t i = 0, e = args.size(); i != e; i++) { | |||
6643 | if (isPlaceholderToRemoveAsArg(args[i]->getType())) { | |||
6644 | ExprResult result = S.CheckPlaceholderExpr(args[i]); | |||
6645 | if (result.isInvalid()) hasInvalid = true; | |||
6646 | else args[i] = result.get(); | |||
6647 | } | |||
6648 | } | |||
6649 | return hasInvalid; | |||
6650 | } | |||
6651 | ||||
6652 | /// If a builtin function has a pointer argument with no explicit address | |||
6653 | /// space, then it should be able to accept a pointer to any address | |||
6654 | /// space as input. In order to do this, we need to replace the | |||
6655 | /// standard builtin declaration with one that uses the same address space | |||
6656 | /// as the call. | |||
6657 | /// | |||
6658 | /// \returns nullptr If this builtin is not a candidate for a rewrite i.e. | |||
6659 | /// it does not contain any pointer arguments without | |||
6660 | /// an address space qualifer. Otherwise the rewritten | |||
6661 | /// FunctionDecl is returned. | |||
6662 | /// TODO: Handle pointer return types. | |||
6663 | static FunctionDecl *rewriteBuiltinFunctionDecl(Sema *Sema, ASTContext &Context, | |||
6664 | FunctionDecl *FDecl, | |||
6665 | MultiExprArg ArgExprs) { | |||
6666 | ||||
6667 | QualType DeclType = FDecl->getType(); | |||
6668 | const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(DeclType); | |||
6669 | ||||
6670 | if (!Context.BuiltinInfo.hasPtrArgsOrResult(FDecl->getBuiltinID()) || !FT || | |||
6671 | ArgExprs.size() < FT->getNumParams()) | |||
6672 | return nullptr; | |||
6673 | ||||
6674 | bool NeedsNewDecl = false; | |||
6675 | unsigned i = 0; | |||
6676 | SmallVector<QualType, 8> OverloadParams; | |||
6677 | ||||
6678 | for (QualType ParamType : FT->param_types()) { | |||
6679 | ||||
6680 | // Convert array arguments to pointer to simplify type lookup. | |||
6681 | ExprResult ArgRes = | |||
6682 | Sema->DefaultFunctionArrayLvalueConversion(ArgExprs[i++]); | |||
6683 | if (ArgRes.isInvalid()) | |||
6684 | return nullptr; | |||
6685 | Expr *Arg = ArgRes.get(); | |||
6686 | QualType ArgType = Arg->getType(); | |||
6687 | if (!ParamType->isPointerType() || ParamType.hasAddressSpace() || | |||
6688 | !ArgType->isPointerType() || | |||
6689 | !ArgType->getPointeeType().hasAddressSpace() || | |||
6690 | isPtrSizeAddressSpace(ArgType->getPointeeType().getAddressSpace())) { | |||
6691 | OverloadParams.push_back(ParamType); | |||
6692 | continue; | |||
6693 | } | |||
6694 | ||||
6695 | QualType PointeeType = ParamType->getPointeeType(); | |||
6696 | if (PointeeType.hasAddressSpace()) | |||
6697 | continue; | |||
6698 | ||||
6699 | NeedsNewDecl = true; | |||
6700 | LangAS AS = ArgType->getPointeeType().getAddressSpace(); | |||
6701 | ||||
6702 | PointeeType = Context.getAddrSpaceQualType(PointeeType, AS); | |||
6703 | OverloadParams.push_back(Context.getPointerType(PointeeType)); | |||
6704 | } | |||
6705 | ||||
6706 | if (!NeedsNewDecl) | |||
6707 | return nullptr; | |||
6708 | ||||
6709 | FunctionProtoType::ExtProtoInfo EPI; | |||
6710 | EPI.Variadic = FT->isVariadic(); | |||
6711 | QualType OverloadTy = Context.getFunctionType(FT->getReturnType(), | |||
6712 | OverloadParams, EPI); | |||
6713 | DeclContext *Parent = FDecl->getParent(); | |||
6714 | FunctionDecl *OverloadDecl = FunctionDecl::Create( | |||
6715 | Context, Parent, FDecl->getLocation(), FDecl->getLocation(), | |||
6716 | FDecl->getIdentifier(), OverloadTy, | |||
6717 | /*TInfo=*/nullptr, SC_Extern, Sema->getCurFPFeatures().isFPConstrained(), | |||
6718 | false, | |||
6719 | /*hasPrototype=*/true); | |||
6720 | SmallVector<ParmVarDecl*, 16> Params; | |||
6721 | FT = cast<FunctionProtoType>(OverloadTy); | |||
6722 | for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) { | |||
6723 | QualType ParamType = FT->getParamType(i); | |||
6724 | ParmVarDecl *Parm = | |||
6725 | ParmVarDecl::Create(Context, OverloadDecl, SourceLocation(), | |||
6726 | SourceLocation(), nullptr, ParamType, | |||
6727 | /*TInfo=*/nullptr, SC_None, nullptr); | |||
6728 | Parm->setScopeInfo(0, i); | |||
6729 | Params.push_back(Parm); | |||
6730 | } | |||
6731 | OverloadDecl->setParams(Params); | |||
6732 | Sema->mergeDeclAttributes(OverloadDecl, FDecl); | |||
6733 | return OverloadDecl; | |||
6734 | } | |||
6735 | ||||
6736 | static void checkDirectCallValidity(Sema &S, const Expr *Fn, | |||
6737 | FunctionDecl *Callee, | |||
6738 | MultiExprArg ArgExprs) { | |||
6739 | // `Callee` (when called with ArgExprs) may be ill-formed. enable_if (and | |||
6740 | // similar attributes) really don't like it when functions are called with an | |||
6741 | // invalid number of args. | |||
6742 | if (S.TooManyArguments(Callee->getNumParams(), ArgExprs.size(), | |||
6743 | /*PartialOverloading=*/false) && | |||
6744 | !Callee->isVariadic()) | |||
6745 | return; | |||
6746 | if (Callee->getMinRequiredArguments() > ArgExprs.size()) | |||
6747 | return; | |||
6748 | ||||
6749 | if (const EnableIfAttr *Attr = | |||
6750 | S.CheckEnableIf(Callee, Fn->getBeginLoc(), ArgExprs, true)) { | |||
6751 | S.Diag(Fn->getBeginLoc(), | |||
6752 | isa<CXXMethodDecl>(Callee) | |||
6753 | ? diag::err_ovl_no_viable_member_function_in_call | |||
6754 | : diag::err_ovl_no_viable_function_in_call) | |||
6755 | << Callee << Callee->getSourceRange(); | |||
6756 | S.Diag(Callee->getLocation(), | |||
6757 | diag::note_ovl_candidate_disabled_by_function_cond_attr) | |||
6758 | << Attr->getCond()->getSourceRange() << Attr->getMessage(); | |||
6759 | return; | |||
6760 | } | |||
6761 | } | |||
6762 | ||||
6763 | static bool enclosingClassIsRelatedToClassInWhichMembersWereFound( | |||
6764 | const UnresolvedMemberExpr *const UME, Sema &S) { | |||
6765 | ||||
6766 | const auto GetFunctionLevelDCIfCXXClass = | |||
6767 | [](Sema &S) -> const CXXRecordDecl * { | |||
6768 | const DeclContext *const DC = S.getFunctionLevelDeclContext(); | |||
6769 | if (!DC || !DC->getParent()) | |||
6770 | return nullptr; | |||
6771 | ||||
6772 | // If the call to some member function was made from within a member | |||
6773 | // function body 'M' return return 'M's parent. | |||
6774 | if (const auto *MD = dyn_cast<CXXMethodDecl>(DC)) | |||
6775 | return MD->getParent()->getCanonicalDecl(); | |||
6776 | // else the call was made from within a default member initializer of a | |||
6777 | // class, so return the class. | |||
6778 | if (const auto *RD = dyn_cast<CXXRecordDecl>(DC)) | |||
6779 | return RD->getCanonicalDecl(); | |||
6780 | return nullptr; | |||
6781 | }; | |||
6782 | // If our DeclContext is neither a member function nor a class (in the | |||
6783 | // case of a lambda in a default member initializer), we can't have an | |||
6784 | // enclosing 'this'. | |||
6785 | ||||
6786 | const CXXRecordDecl *const CurParentClass = GetFunctionLevelDCIfCXXClass(S); | |||
6787 | if (!CurParentClass) | |||
6788 | return false; | |||
6789 | ||||
6790 | // The naming class for implicit member functions call is the class in which | |||
6791 | // name lookup starts. | |||
6792 | const CXXRecordDecl *const NamingClass = | |||
6793 | UME->getNamingClass()->getCanonicalDecl(); | |||
6794 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 6794, __extension__ __PRETTY_FUNCTION__ )); | |||
6795 | ||||
6796 | // If the unresolved member functions were found in a 'naming class' that is | |||
6797 | // related (either the same or derived from) to the class that contains the | |||
6798 | // member function that itself contained the implicit member access. | |||
6799 | ||||
6800 | return CurParentClass == NamingClass || | |||
6801 | CurParentClass->isDerivedFrom(NamingClass); | |||
6802 | } | |||
6803 | ||||
6804 | static void | |||
6805 | tryImplicitlyCaptureThisIfImplicitMemberFunctionAccessWithDependentArgs( | |||
6806 | Sema &S, const UnresolvedMemberExpr *const UME, SourceLocation CallLoc) { | |||
6807 | ||||
6808 | if (!UME) | |||
6809 | return; | |||
6810 | ||||
6811 | LambdaScopeInfo *const CurLSI = S.getCurLambda(); | |||
6812 | // Only try and implicitly capture 'this' within a C++ Lambda if it hasn't | |||
6813 | // already been captured, or if this is an implicit member function call (if | |||
6814 | // it isn't, an attempt to capture 'this' should already have been made). | |||
6815 | if (!CurLSI || CurLSI->ImpCaptureStyle == CurLSI->ImpCap_None || | |||
6816 | !UME->isImplicitAccess() || CurLSI->isCXXThisCaptured()) | |||
6817 | return; | |||
6818 | ||||
6819 | // Check if the naming class in which the unresolved members were found is | |||
6820 | // related (same as or is a base of) to the enclosing class. | |||
6821 | ||||
6822 | if (!enclosingClassIsRelatedToClassInWhichMembersWereFound(UME, S)) | |||
6823 | return; | |||
6824 | ||||
6825 | ||||
6826 | DeclContext *EnclosingFunctionCtx = S.CurContext->getParent()->getParent(); | |||
6827 | // If the enclosing function is not dependent, then this lambda is | |||
6828 | // capture ready, so if we can capture this, do so. | |||
6829 | if (!EnclosingFunctionCtx->isDependentContext()) { | |||
6830 | // If the current lambda and all enclosing lambdas can capture 'this' - | |||
6831 | // then go ahead and capture 'this' (since our unresolved overload set | |||
6832 | // contains at least one non-static member function). | |||
6833 | if (!S.CheckCXXThisCapture(CallLoc, /*Explcit*/ false, /*Diagnose*/ false)) | |||
6834 | S.CheckCXXThisCapture(CallLoc); | |||
6835 | } else if (S.CurContext->isDependentContext()) { | |||
6836 | // ... since this is an implicit member reference, that might potentially | |||
6837 | // involve a 'this' capture, mark 'this' for potential capture in | |||
6838 | // enclosing lambdas. | |||
6839 | if (CurLSI->ImpCaptureStyle != CurLSI->ImpCap_None) | |||
6840 | CurLSI->addPotentialThisCapture(CallLoc); | |||
6841 | } | |||
6842 | } | |||
6843 | ||||
6844 | // Once a call is fully resolved, warn for unqualified calls to specific | |||
6845 | // C++ standard functions, like move and forward. | |||
6846 | static void DiagnosedUnqualifiedCallsToStdFunctions(Sema &S, CallExpr *Call) { | |||
6847 | // We are only checking unary move and forward so exit early here. | |||
6848 | if (Call->getNumArgs() != 1) | |||
6849 | return; | |||
6850 | ||||
6851 | Expr *E = Call->getCallee()->IgnoreParenImpCasts(); | |||
6852 | if (!E || isa<UnresolvedLookupExpr>(E)) | |||
6853 | return; | |||
6854 | DeclRefExpr *DRE = dyn_cast_or_null<DeclRefExpr>(E); | |||
6855 | if (!DRE || !DRE->getLocation().isValid()) | |||
6856 | return; | |||
6857 | ||||
6858 | if (DRE->getQualifier()) | |||
6859 | return; | |||
6860 | ||||
6861 | const FunctionDecl *FD = Call->getDirectCallee(); | |||
6862 | if (!FD) | |||
6863 | return; | |||
6864 | ||||
6865 | // Only warn for some functions deemed more frequent or problematic. | |||
6866 | unsigned BuiltinID = FD->getBuiltinID(); | |||
6867 | if (BuiltinID != Builtin::BImove && BuiltinID != Builtin::BIforward) | |||
6868 | return; | |||
6869 | ||||
6870 | S.Diag(DRE->getLocation(), diag::warn_unqualified_call_to_std_cast_function) | |||
6871 | << FD->getQualifiedNameAsString() | |||
6872 | << FixItHint::CreateInsertion(DRE->getLocation(), "std::"); | |||
6873 | } | |||
6874 | ||||
6875 | ExprResult Sema::ActOnCallExpr(Scope *Scope, Expr *Fn, SourceLocation LParenLoc, | |||
6876 | MultiExprArg ArgExprs, SourceLocation RParenLoc, | |||
6877 | Expr *ExecConfig) { | |||
6878 | ExprResult Call = | |||
6879 | BuildCallExpr(Scope, Fn, LParenLoc, ArgExprs, RParenLoc, ExecConfig, | |||
6880 | /*IsExecConfig=*/false, /*AllowRecovery=*/true); | |||
6881 | if (Call.isInvalid()) | |||
6882 | return Call; | |||
6883 | ||||
6884 | // Diagnose uses of the C++20 "ADL-only template-id call" feature in earlier | |||
6885 | // language modes. | |||
6886 | if (auto *ULE = dyn_cast<UnresolvedLookupExpr>(Fn)) { | |||
6887 | if (ULE->hasExplicitTemplateArgs() && | |||
6888 | ULE->decls_begin() == ULE->decls_end()) { | |||
6889 | Diag(Fn->getExprLoc(), getLangOpts().CPlusPlus20 | |||
6890 | ? diag::warn_cxx17_compat_adl_only_template_id | |||
6891 | : diag::ext_adl_only_template_id) | |||
6892 | << ULE->getName(); | |||
6893 | } | |||
6894 | } | |||
6895 | ||||
6896 | if (LangOpts.OpenMP) | |||
6897 | Call = ActOnOpenMPCall(Call, Scope, LParenLoc, ArgExprs, RParenLoc, | |||
6898 | ExecConfig); | |||
6899 | if (LangOpts.CPlusPlus) { | |||
6900 | CallExpr *CE = dyn_cast<CallExpr>(Call.get()); | |||
6901 | if (CE) | |||
6902 | DiagnosedUnqualifiedCallsToStdFunctions(*this, CE); | |||
6903 | } | |||
6904 | return Call; | |||
6905 | } | |||
6906 | ||||
6907 | /// BuildCallExpr - Handle a call to Fn with the specified array of arguments. | |||
6908 | /// This provides the location of the left/right parens and a list of comma | |||
6909 | /// locations. | |||
6910 | ExprResult Sema::BuildCallExpr(Scope *Scope, Expr *Fn, SourceLocation LParenLoc, | |||
6911 | MultiExprArg ArgExprs, SourceLocation RParenLoc, | |||
6912 | Expr *ExecConfig, bool IsExecConfig, | |||
6913 | bool AllowRecovery) { | |||
6914 | // Since this might be a postfix expression, get rid of ParenListExprs. | |||
6915 | ExprResult Result = MaybeConvertParenListExprToParenExpr(Scope, Fn); | |||
6916 | if (Result.isInvalid()) return ExprError(); | |||
6917 | Fn = Result.get(); | |||
6918 | ||||
6919 | if (checkArgsForPlaceholders(*this, ArgExprs)) | |||
6920 | return ExprError(); | |||
6921 | ||||
6922 | if (getLangOpts().CPlusPlus) { | |||
6923 | // If this is a pseudo-destructor expression, build the call immediately. | |||
6924 | if (isa<CXXPseudoDestructorExpr>(Fn)) { | |||
6925 | if (!ArgExprs.empty()) { | |||
6926 | // Pseudo-destructor calls should not have any arguments. | |||
6927 | Diag(Fn->getBeginLoc(), diag::err_pseudo_dtor_call_with_args) | |||
6928 | << FixItHint::CreateRemoval( | |||
6929 | SourceRange(ArgExprs.front()->getBeginLoc(), | |||
6930 | ArgExprs.back()->getEndLoc())); | |||
6931 | } | |||
6932 | ||||
6933 | return CallExpr::Create(Context, Fn, /*Args=*/{}, Context.VoidTy, | |||
6934 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6935 | } | |||
6936 | if (Fn->getType() == Context.PseudoObjectTy) { | |||
6937 | ExprResult result = CheckPlaceholderExpr(Fn); | |||
6938 | if (result.isInvalid()) return ExprError(); | |||
6939 | Fn = result.get(); | |||
6940 | } | |||
6941 | ||||
6942 | // Determine whether this is a dependent call inside a C++ template, | |||
6943 | // in which case we won't do any semantic analysis now. | |||
6944 | if (Fn->isTypeDependent() || Expr::hasAnyTypeDependentArguments(ArgExprs)) { | |||
6945 | if (ExecConfig) { | |||
6946 | return CUDAKernelCallExpr::Create(Context, Fn, | |||
6947 | cast<CallExpr>(ExecConfig), ArgExprs, | |||
6948 | Context.DependentTy, VK_PRValue, | |||
6949 | RParenLoc, CurFPFeatureOverrides()); | |||
6950 | } else { | |||
6951 | ||||
6952 | tryImplicitlyCaptureThisIfImplicitMemberFunctionAccessWithDependentArgs( | |||
6953 | *this, dyn_cast<UnresolvedMemberExpr>(Fn->IgnoreParens()), | |||
6954 | Fn->getBeginLoc()); | |||
6955 | ||||
6956 | return CallExpr::Create(Context, Fn, ArgExprs, Context.DependentTy, | |||
6957 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6958 | } | |||
6959 | } | |||
6960 | ||||
6961 | // Determine whether this is a call to an object (C++ [over.call.object]). | |||
6962 | if (Fn->getType()->isRecordType()) | |||
6963 | return BuildCallToObjectOfClassType(Scope, Fn, LParenLoc, ArgExprs, | |||
6964 | RParenLoc); | |||
6965 | ||||
6966 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
6967 | ExprResult result = rebuildUnknownAnyFunction(*this, Fn); | |||
6968 | if (result.isInvalid()) return ExprError(); | |||
6969 | Fn = result.get(); | |||
6970 | } | |||
6971 | ||||
6972 | if (Fn->getType() == Context.BoundMemberTy) { | |||
6973 | return BuildCallToMemberFunction(Scope, Fn, LParenLoc, ArgExprs, | |||
6974 | RParenLoc, ExecConfig, IsExecConfig, | |||
6975 | AllowRecovery); | |||
6976 | } | |||
6977 | } | |||
6978 | ||||
6979 | // Check for overloaded calls. This can happen even in C due to extensions. | |||
6980 | if (Fn->getType() == Context.OverloadTy) { | |||
6981 | OverloadExpr::FindResult find = OverloadExpr::find(Fn); | |||
6982 | ||||
6983 | // We aren't supposed to apply this logic if there's an '&' involved. | |||
6984 | if (!find.HasFormOfMemberPointer) { | |||
6985 | if (Expr::hasAnyTypeDependentArguments(ArgExprs)) | |||
6986 | return CallExpr::Create(Context, Fn, ArgExprs, Context.DependentTy, | |||
6987 | VK_PRValue, RParenLoc, CurFPFeatureOverrides()); | |||
6988 | OverloadExpr *ovl = find.Expression; | |||
6989 | if (UnresolvedLookupExpr *ULE = dyn_cast<UnresolvedLookupExpr>(ovl)) | |||
6990 | return BuildOverloadedCallExpr( | |||
6991 | Scope, Fn, ULE, LParenLoc, ArgExprs, RParenLoc, ExecConfig, | |||
6992 | /*AllowTypoCorrection=*/true, find.IsAddressOfOperand); | |||
6993 | return BuildCallToMemberFunction(Scope, Fn, LParenLoc, ArgExprs, | |||
6994 | RParenLoc, ExecConfig, IsExecConfig, | |||
6995 | AllowRecovery); | |||
6996 | } | |||
6997 | } | |||
6998 | ||||
6999 | // If we're directly calling a function, get the appropriate declaration. | |||
7000 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
7001 | ExprResult result = rebuildUnknownAnyFunction(*this, Fn); | |||
7002 | if (result.isInvalid()) return ExprError(); | |||
7003 | Fn = result.get(); | |||
7004 | } | |||
7005 | ||||
7006 | Expr *NakedFn = Fn->IgnoreParens(); | |||
7007 | ||||
7008 | bool CallingNDeclIndirectly = false; | |||
7009 | NamedDecl *NDecl = nullptr; | |||
7010 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(NakedFn)) { | |||
7011 | if (UnOp->getOpcode() == UO_AddrOf) { | |||
7012 | CallingNDeclIndirectly = true; | |||
7013 | NakedFn = UnOp->getSubExpr()->IgnoreParens(); | |||
7014 | } | |||
7015 | } | |||
7016 | ||||
7017 | if (auto *DRE = dyn_cast<DeclRefExpr>(NakedFn)) { | |||
7018 | NDecl = DRE->getDecl(); | |||
7019 | ||||
7020 | FunctionDecl *FDecl = dyn_cast<FunctionDecl>(NDecl); | |||
7021 | if (FDecl && FDecl->getBuiltinID()) { | |||
7022 | // Rewrite the function decl for this builtin by replacing parameters | |||
7023 | // with no explicit address space with the address space of the arguments | |||
7024 | // in ArgExprs. | |||
7025 | if ((FDecl = | |||
7026 | rewriteBuiltinFunctionDecl(this, Context, FDecl, ArgExprs))) { | |||
7027 | NDecl = FDecl; | |||
7028 | Fn = DeclRefExpr::Create( | |||
7029 | Context, FDecl->getQualifierLoc(), SourceLocation(), FDecl, false, | |||
7030 | SourceLocation(), FDecl->getType(), Fn->getValueKind(), FDecl, | |||
7031 | nullptr, DRE->isNonOdrUse()); | |||
7032 | } | |||
7033 | } | |||
7034 | } else if (auto *ME = dyn_cast<MemberExpr>(NakedFn)) | |||
7035 | NDecl = ME->getMemberDecl(); | |||
7036 | ||||
7037 | if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(NDecl)) { | |||
7038 | if (CallingNDeclIndirectly && !checkAddressOfFunctionIsAvailable( | |||
7039 | FD, /*Complain=*/true, Fn->getBeginLoc())) | |||
7040 | return ExprError(); | |||
7041 | ||||
7042 | checkDirectCallValidity(*this, Fn, FD, ArgExprs); | |||
7043 | ||||
7044 | // If this expression is a call to a builtin function in HIP device | |||
7045 | // compilation, allow a pointer-type argument to default address space to be | |||
7046 | // passed as a pointer-type parameter to a non-default address space. | |||
7047 | // If Arg is declared in the default address space and Param is declared | |||
7048 | // in a non-default address space, perform an implicit address space cast to | |||
7049 | // the parameter type. | |||
7050 | if (getLangOpts().HIP && getLangOpts().CUDAIsDevice && FD && | |||
7051 | FD->getBuiltinID()) { | |||
7052 | for (unsigned Idx = 0; Idx < FD->param_size(); ++Idx) { | |||
7053 | ParmVarDecl *Param = FD->getParamDecl(Idx); | |||
7054 | if (!ArgExprs[Idx] || !Param || !Param->getType()->isPointerType() || | |||
7055 | !ArgExprs[Idx]->getType()->isPointerType()) | |||
7056 | continue; | |||
7057 | ||||
7058 | auto ParamAS = Param->getType()->getPointeeType().getAddressSpace(); | |||
7059 | auto ArgTy = ArgExprs[Idx]->getType(); | |||
7060 | auto ArgPtTy = ArgTy->getPointeeType(); | |||
7061 | auto ArgAS = ArgPtTy.getAddressSpace(); | |||
7062 | ||||
7063 | // Add address space cast if target address spaces are different | |||
7064 | bool NeedImplicitASC = | |||
7065 | ParamAS != LangAS::Default && // Pointer params in generic AS don't need special handling. | |||
7066 | ( ArgAS == LangAS::Default || // We do allow implicit conversion from generic AS | |||
7067 | // or from specific AS which has target AS matching that of Param. | |||
7068 | getASTContext().getTargetAddressSpace(ArgAS) == getASTContext().getTargetAddressSpace(ParamAS)); | |||
7069 | if (!NeedImplicitASC) | |||
7070 | continue; | |||
7071 | ||||
7072 | // First, ensure that the Arg is an RValue. | |||
7073 | if (ArgExprs[Idx]->isGLValue()) { | |||
7074 | ArgExprs[Idx] = ImplicitCastExpr::Create( | |||
7075 | Context, ArgExprs[Idx]->getType(), CK_NoOp, ArgExprs[Idx], | |||
7076 | nullptr, VK_PRValue, FPOptionsOverride()); | |||
7077 | } | |||
7078 | ||||
7079 | // Construct a new arg type with address space of Param | |||
7080 | Qualifiers ArgPtQuals = ArgPtTy.getQualifiers(); | |||
7081 | ArgPtQuals.setAddressSpace(ParamAS); | |||
7082 | auto NewArgPtTy = | |||
7083 | Context.getQualifiedType(ArgPtTy.getUnqualifiedType(), ArgPtQuals); | |||
7084 | auto NewArgTy = | |||
7085 | Context.getQualifiedType(Context.getPointerType(NewArgPtTy), | |||
7086 | ArgTy.getQualifiers()); | |||
7087 | ||||
7088 | // Finally perform an implicit address space cast | |||
7089 | ArgExprs[Idx] = ImpCastExprToType(ArgExprs[Idx], NewArgTy, | |||
7090 | CK_AddressSpaceConversion) | |||
7091 | .get(); | |||
7092 | } | |||
7093 | } | |||
7094 | } | |||
7095 | ||||
7096 | if (Context.isDependenceAllowed() && | |||
7097 | (Fn->isTypeDependent() || Expr::hasAnyTypeDependentArguments(ArgExprs))) { | |||
7098 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "clang/lib/Sema/SemaExpr.cpp" , 7098, __extension__ __PRETTY_FUNCTION__)); | |||
7099 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 7102, __extension__ __PRETTY_FUNCTION__ )) | |||
7100 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 7102, __extension__ __PRETTY_FUNCTION__ )) | |||
7101 | [](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.\"" , "clang/lib/Sema/SemaExpr.cpp", 7102, __extension__ __PRETTY_FUNCTION__ )) | |||
7102 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 7102, __extension__ __PRETTY_FUNCTION__ )); | |||
7103 | QualType ReturnType = | |||
7104 | llvm::isa_and_nonnull<FunctionDecl>(NDecl) | |||
7105 | ? cast<FunctionDecl>(NDecl)->getCallResultType() | |||
7106 | : Context.DependentTy; | |||
7107 | return CallExpr::Create(Context, Fn, ArgExprs, ReturnType, | |||
7108 | Expr::getValueKindForType(ReturnType), RParenLoc, | |||
7109 | CurFPFeatureOverrides()); | |||
7110 | } | |||
7111 | return BuildResolvedCallExpr(Fn, NDecl, LParenLoc, ArgExprs, RParenLoc, | |||
7112 | ExecConfig, IsExecConfig); | |||
7113 | } | |||
7114 | ||||
7115 | /// BuildBuiltinCallExpr - Create a call to a builtin function specified by Id | |||
7116 | // with the specified CallArgs | |||
7117 | Expr *Sema::BuildBuiltinCallExpr(SourceLocation Loc, Builtin::ID Id, | |||
7118 | MultiExprArg CallArgs) { | |||
7119 | StringRef Name = Context.BuiltinInfo.getName(Id); | |||
7120 | LookupResult R(*this, &Context.Idents.get(Name), Loc, | |||
7121 | Sema::LookupOrdinaryName); | |||
7122 | LookupName(R, TUScope, /*AllowBuiltinCreation=*/true); | |||
7123 | ||||
7124 | auto *BuiltInDecl = R.getAsSingle<FunctionDecl>(); | |||
7125 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 7125, __extension__ __PRETTY_FUNCTION__ )); | |||
7126 | ||||
7127 | ExprResult DeclRef = | |||
7128 | BuildDeclRefExpr(BuiltInDecl, BuiltInDecl->getType(), VK_LValue, Loc); | |||
7129 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 7129, __extension__ __PRETTY_FUNCTION__ )); | |||
7130 | ||||
7131 | ExprResult Call = | |||
7132 | BuildCallExpr(/*Scope=*/nullptr, DeclRef.get(), Loc, CallArgs, Loc); | |||
7133 | ||||
7134 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 7134, __extension__ __PRETTY_FUNCTION__ )); | |||
7135 | return Call.get(); | |||
7136 | } | |||
7137 | ||||
7138 | /// Parse a __builtin_astype expression. | |||
7139 | /// | |||
7140 | /// __builtin_astype( value, dst type ) | |||
7141 | /// | |||
7142 | ExprResult Sema::ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, | |||
7143 | SourceLocation BuiltinLoc, | |||
7144 | SourceLocation RParenLoc) { | |||
7145 | QualType DstTy = GetTypeFromParser(ParsedDestTy); | |||
7146 | return BuildAsTypeExpr(E, DstTy, BuiltinLoc, RParenLoc); | |||
7147 | } | |||
7148 | ||||
7149 | /// Create a new AsTypeExpr node (bitcast) from the arguments. | |||
7150 | ExprResult Sema::BuildAsTypeExpr(Expr *E, QualType DestTy, | |||
7151 | SourceLocation BuiltinLoc, | |||
7152 | SourceLocation RParenLoc) { | |||
7153 | ExprValueKind VK = VK_PRValue; | |||
7154 | ExprObjectKind OK = OK_Ordinary; | |||
7155 | QualType SrcTy = E->getType(); | |||
7156 | if (!SrcTy->isDependentType() && | |||
7157 | Context.getTypeSize(DestTy) != Context.getTypeSize(SrcTy)) | |||
7158 | return ExprError( | |||
7159 | Diag(BuiltinLoc, diag::err_invalid_astype_of_different_size) | |||
7160 | << DestTy << SrcTy << E->getSourceRange()); | |||
7161 | return new (Context) AsTypeExpr(E, DestTy, VK, OK, BuiltinLoc, RParenLoc); | |||
7162 | } | |||
7163 | ||||
7164 | /// ActOnConvertVectorExpr - create a new convert-vector expression from the | |||
7165 | /// provided arguments. | |||
7166 | /// | |||
7167 | /// __builtin_convertvector( value, dst type ) | |||
7168 | /// | |||
7169 | ExprResult Sema::ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy, | |||
7170 | SourceLocation BuiltinLoc, | |||
7171 | SourceLocation RParenLoc) { | |||
7172 | TypeSourceInfo *TInfo; | |||
7173 | GetTypeFromParser(ParsedDestTy, &TInfo); | |||
7174 | return SemaConvertVectorExpr(E, TInfo, BuiltinLoc, RParenLoc); | |||
7175 | } | |||
7176 | ||||
7177 | /// BuildResolvedCallExpr - Build a call to a resolved expression, | |||
7178 | /// i.e. an expression not of \p OverloadTy. The expression should | |||
7179 | /// unary-convert to an expression of function-pointer or | |||
7180 | /// block-pointer type. | |||
7181 | /// | |||
7182 | /// \param NDecl the declaration being called, if available | |||
7183 | ExprResult Sema::BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, | |||
7184 | SourceLocation LParenLoc, | |||
7185 | ArrayRef<Expr *> Args, | |||
7186 | SourceLocation RParenLoc, Expr *Config, | |||
7187 | bool IsExecConfig, ADLCallKind UsesADL) { | |||
7188 | FunctionDecl *FDecl = dyn_cast_or_null<FunctionDecl>(NDecl); | |||
7189 | unsigned BuiltinID = (FDecl ? FDecl->getBuiltinID() : 0); | |||
7190 | ||||
7191 | // Functions with 'interrupt' attribute cannot be called directly. | |||
7192 | if (FDecl && FDecl->hasAttr<AnyX86InterruptAttr>()) { | |||
7193 | Diag(Fn->getExprLoc(), diag::err_anyx86_interrupt_called); | |||
7194 | return ExprError(); | |||
7195 | } | |||
7196 | ||||
7197 | // Interrupt handlers don't save off the VFP regs automatically on ARM, | |||
7198 | // so there's some risk when calling out to non-interrupt handler functions | |||
7199 | // that the callee might not preserve them. This is easy to diagnose here, | |||
7200 | // but can be very challenging to debug. | |||
7201 | // Likewise, X86 interrupt handlers may only call routines with attribute | |||
7202 | // no_caller_saved_registers since there is no efficient way to | |||
7203 | // save and restore the non-GPR state. | |||
7204 | if (auto *Caller = getCurFunctionDecl()) { | |||
7205 | if (Caller->hasAttr<ARMInterruptAttr>()) { | |||
7206 | bool VFP = Context.getTargetInfo().hasFeature("vfp"); | |||
7207 | if (VFP && (!FDecl || !FDecl->hasAttr<ARMInterruptAttr>())) { | |||
7208 | Diag(Fn->getExprLoc(), diag::warn_arm_interrupt_calling_convention); | |||
7209 | if (FDecl) | |||
7210 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
7211 | } | |||
7212 | } | |||
7213 | if (Caller->hasAttr<AnyX86InterruptAttr>() && | |||
7214 | ((!FDecl || !FDecl->hasAttr<AnyX86NoCallerSavedRegistersAttr>()))) { | |||
7215 | Diag(Fn->getExprLoc(), diag::warn_anyx86_interrupt_regsave); | |||
7216 | if (FDecl) | |||
7217 | Diag(FDecl->getLocation(), diag::note_callee_decl) << FDecl; | |||
7218 | } | |||
7219 | } | |||
7220 | ||||
7221 | // Promote the function operand. | |||
7222 | // We special-case function promotion here because we only allow promoting | |||
7223 | // builtin functions to function pointers in the callee of a call. | |||
7224 | ExprResult Result; | |||
7225 | QualType ResultTy; | |||
7226 | if (BuiltinID && | |||
7227 | Fn->getType()->isSpecificBuiltinType(BuiltinType::BuiltinFn)) { | |||
7228 | // Extract the return type from the (builtin) function pointer type. | |||
7229 | // FIXME Several builtins still have setType in | |||
7230 | // Sema::CheckBuiltinFunctionCall. One should review their definitions in | |||
7231 | // Builtins.def to ensure they are correct before removing setType calls. | |||
7232 | QualType FnPtrTy = Context.getPointerType(FDecl->getType()); | |||
7233 | Result = ImpCastExprToType(Fn, FnPtrTy, CK_BuiltinFnToFnPtr).get(); | |||
7234 | ResultTy = FDecl->getCallResultType(); | |||
7235 | } else { | |||
7236 | Result = CallExprUnaryConversions(Fn); | |||
7237 | ResultTy = Context.BoolTy; | |||
7238 | } | |||
7239 | if (Result.isInvalid()) | |||
7240 | return ExprError(); | |||
7241 | Fn = Result.get(); | |||
7242 | ||||
7243 | // Check for a valid function type, but only if it is not a builtin which | |||
7244 | // requires custom type checking. These will be handled by | |||
7245 | // CheckBuiltinFunctionCall below just after creation of the call expression. | |||
7246 | const FunctionType *FuncT = nullptr; | |||
7247 | if (!BuiltinID || !Context.BuiltinInfo.hasCustomTypechecking(BuiltinID)) { | |||
7248 | retry: | |||
7249 | if (const PointerType *PT = Fn->getType()->getAs<PointerType>()) { | |||
7250 | // C99 6.5.2.2p1 - "The expression that denotes the called function shall | |||
7251 | // have type pointer to function". | |||
7252 | FuncT = PT->getPointeeType()->getAs<FunctionType>(); | |||
7253 | if (!FuncT) | |||
7254 | return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function) | |||
7255 | << Fn->getType() << Fn->getSourceRange()); | |||
7256 | } else if (const BlockPointerType *BPT = | |||
7257 | Fn->getType()->getAs<BlockPointerType>()) { | |||
7258 | FuncT = BPT->getPointeeType()->castAs<FunctionType>(); | |||
7259 | } else { | |||
7260 | // Handle calls to expressions of unknown-any type. | |||
7261 | if (Fn->getType() == Context.UnknownAnyTy) { | |||
7262 | ExprResult rewrite = rebuildUnknownAnyFunction(*this, Fn); | |||
7263 | if (rewrite.isInvalid()) | |||
7264 | return ExprError(); | |||
7265 | Fn = rewrite.get(); | |||
7266 | goto retry; | |||
7267 | } | |||
7268 | ||||
7269 | return ExprError(Diag(LParenLoc, diag::err_typecheck_call_not_function) | |||
7270 | << Fn->getType() << Fn->getSourceRange()); | |||
7271 | } | |||
7272 | } | |||
7273 | ||||
7274 | // Get the number of parameters in the function prototype, if any. | |||
7275 | // We will allocate space for max(Args.size(), NumParams) arguments | |||
7276 | // in the call expression. | |||
7277 | const auto *Proto = dyn_cast_or_null<FunctionProtoType>(FuncT); | |||
7278 | unsigned NumParams = Proto ? Proto->getNumParams() : 0; | |||
7279 | ||||
7280 | CallExpr *TheCall; | |||
7281 | if (Config) { | |||
7282 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 7283, __extension__ __PRETTY_FUNCTION__ )) | |||
7283 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 7283, __extension__ __PRETTY_FUNCTION__ )); | |||
7284 | TheCall = CUDAKernelCallExpr::Create(Context, Fn, cast<CallExpr>(Config), | |||
7285 | Args, ResultTy, VK_PRValue, RParenLoc, | |||
7286 | CurFPFeatureOverrides(), NumParams); | |||
7287 | } else { | |||
7288 | TheCall = | |||
7289 | CallExpr::Create(Context, Fn, Args, ResultTy, VK_PRValue, RParenLoc, | |||
7290 | CurFPFeatureOverrides(), NumParams, UsesADL); | |||
7291 | } | |||
7292 | ||||
7293 | if (!Context.isDependenceAllowed()) { | |||
7294 | // Forget about the nulled arguments since typo correction | |||
7295 | // do not handle them well. | |||
7296 | TheCall->shrinkNumArgs(Args.size()); | |||
7297 | // C cannot always handle TypoExpr nodes in builtin calls and direct | |||
7298 | // function calls as their argument checking don't necessarily handle | |||
7299 | // dependent types properly, so make sure any TypoExprs have been | |||
7300 | // dealt with. | |||
7301 | ExprResult Result = CorrectDelayedTyposInExpr(TheCall); | |||
7302 | if (!Result.isUsable()) return ExprError(); | |||
7303 | CallExpr *TheOldCall = TheCall; | |||
7304 | TheCall = dyn_cast<CallExpr>(Result.get()); | |||
7305 | bool CorrectedTypos = TheCall != TheOldCall; | |||
7306 | if (!TheCall) return Result; | |||
7307 | Args = llvm::ArrayRef(TheCall->getArgs(), TheCall->getNumArgs()); | |||
7308 | ||||
7309 | // A new call expression node was created if some typos were corrected. | |||
7310 | // However it may not have been constructed with enough storage. In this | |||
7311 | // case, rebuild the node with enough storage. The waste of space is | |||
7312 | // immaterial since this only happens when some typos were corrected. | |||
7313 | if (CorrectedTypos && Args.size() < NumParams) { | |||
7314 | if (Config) | |||
7315 | TheCall = CUDAKernelCallExpr::Create( | |||
7316 | Context, Fn, cast<CallExpr>(Config), Args, ResultTy, VK_PRValue, | |||
7317 | RParenLoc, CurFPFeatureOverrides(), NumParams); | |||
7318 | else | |||
7319 | TheCall = | |||
7320 | CallExpr::Create(Context, Fn, Args, ResultTy, VK_PRValue, RParenLoc, | |||
7321 | CurFPFeatureOverrides(), NumParams, UsesADL); | |||
7322 | } | |||
7323 | // We can now handle the nulled arguments for the default arguments. | |||
7324 | TheCall->setNumArgsUnsafe(std::max<unsigned>(Args.size(), NumParams)); | |||
7325 | } | |||
7326 | ||||
7327 | // Bail out early if calling a builtin with custom type checking. | |||
7328 | if (BuiltinID && Context.BuiltinInfo.hasCustomTypechecking(BuiltinID)) | |||
7329 | return CheckBuiltinFunctionCall(FDecl, BuiltinID, TheCall); | |||
7330 | ||||
7331 | if (getLangOpts().CUDA) { | |||
7332 | if (Config) { | |||
7333 | // CUDA: Kernel calls must be to global functions | |||
7334 | if (FDecl && !FDecl->hasAttr<CUDAGlobalAttr>()) | |||
7335 | return ExprError(Diag(LParenLoc,diag::err_kern_call_not_global_function) | |||
7336 | << FDecl << Fn->getSourceRange()); | |||
7337 | ||||
7338 | // CUDA: Kernel function must have 'void' return type | |||
7339 | if (!FuncT->getReturnType()->isVoidType() && | |||
7340 | !FuncT->getReturnType()->getAs<AutoType>() && | |||
7341 | !FuncT->getReturnType()->isInstantiationDependentType()) | |||
7342 | return ExprError(Diag(LParenLoc, diag::err_kern_type_not_void_return) | |||
7343 | << Fn->getType() << Fn->getSourceRange()); | |||
7344 | } else { | |||
7345 | // CUDA: Calls to global functions must be configured | |||
7346 | if (FDecl && FDecl->hasAttr<CUDAGlobalAttr>()) | |||
7347 | return ExprError(Diag(LParenLoc, diag::err_global_call_not_config) | |||
7348 | << FDecl << Fn->getSourceRange()); | |||
7349 | } | |||
7350 | } | |||
7351 | ||||
7352 | // Check for a valid return type | |||
7353 | if (CheckCallReturnType(FuncT->getReturnType(), Fn->getBeginLoc(), TheCall, | |||
7354 | FDecl)) | |||
7355 | return ExprError(); | |||
7356 | ||||
7357 | // We know the result type of the call, set it. | |||
7358 | TheCall->setType(FuncT->getCallResultType(Context)); | |||
7359 | TheCall->setValueKind(Expr::getValueKindForType(FuncT->getReturnType())); | |||
7360 | ||||
7361 | if (Proto) { | |||
7362 | if (ConvertArgumentsForCall(TheCall, Fn, FDecl, Proto, Args, RParenLoc, | |||
7363 | IsExecConfig)) | |||
7364 | return ExprError(); | |||
7365 | } else { | |||
7366 | assert(isa<FunctionNoProtoType>(FuncT) && "Unknown FunctionType!")(static_cast <bool> (isa<FunctionNoProtoType>(FuncT ) && "Unknown FunctionType!") ? void (0) : __assert_fail ("isa<FunctionNoProtoType>(FuncT) && \"Unknown FunctionType!\"" , "clang/lib/Sema/SemaExpr.cpp", 7366, __extension__ __PRETTY_FUNCTION__ )); | |||
7367 | ||||
7368 | if (FDecl) { | |||
7369 | // Check if we have too few/too many template arguments, based | |||
7370 | // on our knowledge of the function definition. | |||
7371 | const FunctionDecl *Def = nullptr; | |||
7372 | if (FDecl->hasBody(Def) && Args.size() != Def->param_size()) { | |||
7373 | Proto = Def->getType()->getAs<FunctionProtoType>(); | |||
7374 | if (!Proto || !(Proto->isVariadic() && Args.size() >= Def->param_size())) | |||
7375 | Diag(RParenLoc, diag::warn_call_wrong_number_of_arguments) | |||
7376 | << (Args.size() > Def->param_size()) << FDecl << Fn->getSourceRange(); | |||
7377 | } | |||
7378 | ||||
7379 | // If the function we're calling isn't a function prototype, but we have | |||
7380 | // a function prototype from a prior declaratiom, use that prototype. | |||
7381 | if (!FDecl->hasPrototype()) | |||
7382 | Proto = FDecl->getType()->getAs<FunctionProtoType>(); | |||
7383 | } | |||
7384 | ||||
7385 | // If we still haven't found a prototype to use but there are arguments to | |||
7386 | // the call, diagnose this as calling a function without a prototype. | |||
7387 | // However, if we found a function declaration, check to see if | |||
7388 | // -Wdeprecated-non-prototype was disabled where the function was declared. | |||
7389 | // If so, we will silence the diagnostic here on the assumption that this | |||
7390 | // interface is intentional and the user knows what they're doing. We will | |||
7391 | // also silence the diagnostic if there is a function declaration but it | |||
7392 | // was implicitly defined (the user already gets diagnostics about the | |||
7393 | // creation of the implicit function declaration, so the additional warning | |||
7394 | // is not helpful). | |||
7395 | if (!Proto && !Args.empty() && | |||
7396 | (!FDecl || (!FDecl->isImplicit() && | |||
7397 | !Diags.isIgnored(diag::warn_strict_uses_without_prototype, | |||
7398 | FDecl->getLocation())))) | |||
7399 | Diag(LParenLoc, diag::warn_strict_uses_without_prototype) | |||
7400 | << (FDecl != nullptr) << FDecl; | |||
7401 | ||||
7402 | // Promote the arguments (C99 6.5.2.2p6). | |||
7403 | for (unsigned i = 0, e = Args.size(); i != e; i++) { | |||
7404 | Expr *Arg = Args[i]; | |||
7405 | ||||
7406 | if (Proto && i < Proto->getNumParams()) { | |||
7407 | InitializedEntity Entity = InitializedEntity::InitializeParameter( | |||
7408 | Context, Proto->getParamType(i), Proto->isParamConsumed(i)); | |||
7409 | ExprResult ArgE = | |||
7410 | PerformCopyInitialization(Entity, SourceLocation(), Arg); | |||
7411 | if (ArgE.isInvalid()) | |||
7412 | return true; | |||
7413 | ||||
7414 | Arg = ArgE.getAs<Expr>(); | |||
7415 | ||||
7416 | } else { | |||
7417 | ExprResult ArgE = DefaultArgumentPromotion(Arg); | |||
7418 | ||||
7419 | if (ArgE.isInvalid()) | |||
7420 | return true; | |||
7421 | ||||
7422 | Arg = ArgE.getAs<Expr>(); | |||
7423 | } | |||
7424 | ||||
7425 | if (RequireCompleteType(Arg->getBeginLoc(), Arg->getType(), | |||
7426 | diag::err_call_incomplete_argument, Arg)) | |||
7427 | return ExprError(); | |||
7428 | ||||
7429 | TheCall->setArg(i, Arg); | |||
7430 | } | |||
7431 | TheCall->computeDependence(); | |||
7432 | } | |||
7433 | ||||
7434 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(FDecl)) | |||
7435 | if (!Method->isStatic()) | |||
7436 | return ExprError(Diag(LParenLoc, diag::err_member_call_without_object) | |||
7437 | << Fn->getSourceRange()); | |||
7438 | ||||
7439 | // Check for sentinels | |||
7440 | if (NDecl) | |||
7441 | DiagnoseSentinelCalls(NDecl, LParenLoc, Args); | |||
7442 | ||||
7443 | // Warn for unions passing across security boundary (CMSE). | |||
7444 | if (FuncT != nullptr && FuncT->getCmseNSCallAttr()) { | |||
7445 | for (unsigned i = 0, e = Args.size(); i != e; i++) { | |||
7446 | if (const auto *RT = | |||
7447 | dyn_cast<RecordType>(Args[i]->getType().getCanonicalType())) { | |||
7448 | if (RT->getDecl()->isOrContainsUnion()) | |||
7449 | Diag(Args[i]->getBeginLoc(), diag::warn_cmse_nonsecure_union) | |||
7450 | << 0 << i; | |||
7451 | } | |||
7452 | } | |||
7453 | } | |||
7454 | ||||
7455 | // Do special checking on direct calls to functions. | |||
7456 | if (FDecl) { | |||
7457 | if (CheckFunctionCall(FDecl, TheCall, Proto)) | |||
7458 | return ExprError(); | |||
7459 | ||||
7460 | checkFortifiedBuiltinMemoryFunction(FDecl, TheCall); | |||
7461 | ||||
7462 | if (BuiltinID) | |||
7463 | return CheckBuiltinFunctionCall(FDecl, BuiltinID, TheCall); | |||
7464 | } else if (NDecl) { | |||
7465 | if (CheckPointerCall(NDecl, TheCall, Proto)) | |||
7466 | return ExprError(); | |||
7467 | } else { | |||
7468 | if (CheckOtherCall(TheCall, Proto)) | |||
7469 | return ExprError(); | |||
7470 | } | |||
7471 | ||||
7472 | return CheckForImmediateInvocation(MaybeBindToTemporary(TheCall), FDecl); | |||
7473 | } | |||
7474 | ||||
7475 | ExprResult | |||
7476 | Sema::ActOnCompoundLiteral(SourceLocation LParenLoc, ParsedType Ty, | |||
7477 | SourceLocation RParenLoc, Expr *InitExpr) { | |||
7478 | assert(Ty && "ActOnCompoundLiteral(): missing type")(static_cast <bool> (Ty && "ActOnCompoundLiteral(): missing type" ) ? void (0) : __assert_fail ("Ty && \"ActOnCompoundLiteral(): missing type\"" , "clang/lib/Sema/SemaExpr.cpp", 7478, __extension__ __PRETTY_FUNCTION__ )); | |||
7479 | assert(InitExpr && "ActOnCompoundLiteral(): missing expression")(static_cast <bool> (InitExpr && "ActOnCompoundLiteral(): missing expression" ) ? void (0) : __assert_fail ("InitExpr && \"ActOnCompoundLiteral(): missing expression\"" , "clang/lib/Sema/SemaExpr.cpp", 7479, __extension__ __PRETTY_FUNCTION__ )); | |||
7480 | ||||
7481 | TypeSourceInfo *TInfo; | |||
7482 | QualType literalType = GetTypeFromParser(Ty, &TInfo); | |||
7483 | if (!TInfo) | |||
7484 | TInfo = Context.getTrivialTypeSourceInfo(literalType); | |||
7485 | ||||
7486 | return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, InitExpr); | |||
7487 | } | |||
7488 | ||||
7489 | ExprResult | |||
7490 | Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo, | |||
7491 | SourceLocation RParenLoc, Expr *LiteralExpr) { | |||
7492 | QualType literalType = TInfo->getType(); | |||
7493 | ||||
7494 | if (literalType->isArrayType()) { | |||
7495 | if (RequireCompleteSizedType( | |||
7496 | LParenLoc, Context.getBaseElementType(literalType), | |||
7497 | diag::err_array_incomplete_or_sizeless_type, | |||
7498 | SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()))) | |||
7499 | return ExprError(); | |||
7500 | if (literalType->isVariableArrayType()) { | |||
7501 | // C2x 6.7.9p4: An entity of variable length array type shall not be | |||
7502 | // initialized except by an empty initializer. | |||
7503 | // | |||
7504 | // The C extension warnings are issued from ParseBraceInitializer() and | |||
7505 | // do not need to be issued here. However, we continue to issue an error | |||
7506 | // in the case there are initializers or we are compiling C++. We allow | |||
7507 | // use of VLAs in C++, but it's not clear we want to allow {} to zero | |||
7508 | // init a VLA in C++ in all cases (such as with non-trivial constructors). | |||
7509 | // FIXME: should we allow this construct in C++ when it makes sense to do | |||
7510 | // so? | |||
7511 | std::optional<unsigned> NumInits; | |||
7512 | if (const auto *ILE = dyn_cast<InitListExpr>(LiteralExpr)) | |||
7513 | NumInits = ILE->getNumInits(); | |||
7514 | if ((LangOpts.CPlusPlus || NumInits.value_or(0)) && | |||
7515 | !tryToFixVariablyModifiedVarType(TInfo, literalType, LParenLoc, | |||
7516 | diag::err_variable_object_no_init)) | |||
7517 | return ExprError(); | |||
7518 | } | |||
7519 | } else if (!literalType->isDependentType() && | |||
7520 | RequireCompleteType(LParenLoc, literalType, | |||
7521 | diag::err_typecheck_decl_incomplete_type, | |||
7522 | SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()))) | |||
7523 | return ExprError(); | |||
7524 | ||||
7525 | InitializedEntity Entity | |||
7526 | = InitializedEntity::InitializeCompoundLiteralInit(TInfo); | |||
7527 | InitializationKind Kind | |||
7528 | = InitializationKind::CreateCStyleCast(LParenLoc, | |||
7529 | SourceRange(LParenLoc, RParenLoc), | |||
7530 | /*InitList=*/true); | |||
7531 | InitializationSequence InitSeq(*this, Entity, Kind, LiteralExpr); | |||
7532 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, LiteralExpr, | |||
7533 | &literalType); | |||
7534 | if (Result.isInvalid()) | |||
7535 | return ExprError(); | |||
7536 | LiteralExpr = Result.get(); | |||
7537 | ||||
7538 | bool isFileScope = !CurContext->isFunctionOrMethod(); | |||
7539 | ||||
7540 | // In C, compound literals are l-values for some reason. | |||
7541 | // For GCC compatibility, in C++, file-scope array compound literals with | |||
7542 | // constant initializers are also l-values, and compound literals are | |||
7543 | // otherwise prvalues. | |||
7544 | // | |||
7545 | // (GCC also treats C++ list-initialized file-scope array prvalues with | |||
7546 | // constant initializers as l-values, but that's non-conforming, so we don't | |||
7547 | // follow it there.) | |||
7548 | // | |||
7549 | // FIXME: It would be better to handle the lvalue cases as materializing and | |||
7550 | // lifetime-extending a temporary object, but our materialized temporaries | |||
7551 | // representation only supports lifetime extension from a variable, not "out | |||
7552 | // of thin air". | |||
7553 | // FIXME: For C++, we might want to instead lifetime-extend only if a pointer | |||
7554 | // is bound to the result of applying array-to-pointer decay to the compound | |||
7555 | // literal. | |||
7556 | // FIXME: GCC supports compound literals of reference type, which should | |||
7557 | // obviously have a value kind derived from the kind of reference involved. | |||
7558 | ExprValueKind VK = | |||
7559 | (getLangOpts().CPlusPlus && !(isFileScope && literalType->isArrayType())) | |||
7560 | ? VK_PRValue | |||
7561 | : VK_LValue; | |||
7562 | ||||
7563 | if (isFileScope) | |||
7564 | if (auto ILE = dyn_cast<InitListExpr>(LiteralExpr)) | |||
7565 | for (unsigned i = 0, j = ILE->getNumInits(); i != j; i++) { | |||
7566 | Expr *Init = ILE->getInit(i); | |||
7567 | ILE->setInit(i, ConstantExpr::Create(Context, Init)); | |||
7568 | } | |||
7569 | ||||
7570 | auto *E = new (Context) CompoundLiteralExpr(LParenLoc, TInfo, literalType, | |||
7571 | VK, LiteralExpr, isFileScope); | |||
7572 | if (isFileScope) { | |||
7573 | if (!LiteralExpr->isTypeDependent() && | |||
7574 | !LiteralExpr->isValueDependent() && | |||
7575 | !literalType->isDependentType()) // C99 6.5.2.5p3 | |||
7576 | if (CheckForConstantInitializer(LiteralExpr, literalType)) | |||
7577 | return ExprError(); | |||
7578 | } else if (literalType.getAddressSpace() != LangAS::opencl_private && | |||
7579 | literalType.getAddressSpace() != LangAS::Default) { | |||
7580 | // Embedded-C extensions to C99 6.5.2.5: | |||
7581 | // "If the compound literal occurs inside the body of a function, the | |||
7582 | // type name shall not be qualified by an address-space qualifier." | |||
7583 | Diag(LParenLoc, diag::err_compound_literal_with_address_space) | |||
7584 | << SourceRange(LParenLoc, LiteralExpr->getSourceRange().getEnd()); | |||
7585 | return ExprError(); | |||
7586 | } | |||
7587 | ||||
7588 | if (!isFileScope && !getLangOpts().CPlusPlus) { | |||
7589 | // Compound literals that have automatic storage duration are destroyed at | |||
7590 | // the end of the scope in C; in C++, they're just temporaries. | |||
7591 | ||||
7592 | // Emit diagnostics if it is or contains a C union type that is non-trivial | |||
7593 | // to destruct. | |||
7594 | if (E->getType().hasNonTrivialToPrimitiveDestructCUnion()) | |||
7595 | checkNonTrivialCUnion(E->getType(), E->getExprLoc(), | |||
7596 | NTCUC_CompoundLiteral, NTCUK_Destruct); | |||
7597 | ||||
7598 | // Diagnose jumps that enter or exit the lifetime of the compound literal. | |||
7599 | if (literalType.isDestructedType()) { | |||
7600 | Cleanup.setExprNeedsCleanups(true); | |||
7601 | ExprCleanupObjects.push_back(E); | |||
7602 | getCurFunction()->setHasBranchProtectedScope(); | |||
7603 | } | |||
7604 | } | |||
7605 | ||||
7606 | if (E->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | |||
7607 | E->getType().hasNonTrivialToPrimitiveCopyCUnion()) | |||
7608 | checkNonTrivialCUnionInInitializer(E->getInitializer(), | |||
7609 | E->getInitializer()->getExprLoc()); | |||
7610 | ||||
7611 | return MaybeBindToTemporary(E); | |||
7612 | } | |||
7613 | ||||
7614 | ExprResult | |||
7615 | Sema::ActOnInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList, | |||
7616 | SourceLocation RBraceLoc) { | |||
7617 | // Only produce each kind of designated initialization diagnostic once. | |||
7618 | SourceLocation FirstDesignator; | |||
7619 | bool DiagnosedArrayDesignator = false; | |||
7620 | bool DiagnosedNestedDesignator = false; | |||
7621 | bool DiagnosedMixedDesignator = false; | |||
7622 | ||||
7623 | // Check that any designated initializers are syntactically valid in the | |||
7624 | // current language mode. | |||
7625 | for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) { | |||
7626 | if (auto *DIE = dyn_cast<DesignatedInitExpr>(InitArgList[I])) { | |||
7627 | if (FirstDesignator.isInvalid()) | |||
7628 | FirstDesignator = DIE->getBeginLoc(); | |||
7629 | ||||
7630 | if (!getLangOpts().CPlusPlus) | |||
7631 | break; | |||
7632 | ||||
7633 | if (!DiagnosedNestedDesignator && DIE->size() > 1) { | |||
7634 | DiagnosedNestedDesignator = true; | |||
7635 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_nested) | |||
7636 | << DIE->getDesignatorsSourceRange(); | |||
7637 | } | |||
7638 | ||||
7639 | for (auto &Desig : DIE->designators()) { | |||
7640 | if (!Desig.isFieldDesignator() && !DiagnosedArrayDesignator) { | |||
7641 | DiagnosedArrayDesignator = true; | |||
7642 | Diag(Desig.getBeginLoc(), diag::ext_designated_init_array) | |||
7643 | << Desig.getSourceRange(); | |||
7644 | } | |||
7645 | } | |||
7646 | ||||
7647 | if (!DiagnosedMixedDesignator && | |||
7648 | !isa<DesignatedInitExpr>(InitArgList[0])) { | |||
7649 | DiagnosedMixedDesignator = true; | |||
7650 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_mixed) | |||
7651 | << DIE->getSourceRange(); | |||
7652 | Diag(InitArgList[0]->getBeginLoc(), diag::note_designated_init_mixed) | |||
7653 | << InitArgList[0]->getSourceRange(); | |||
7654 | } | |||
7655 | } else if (getLangOpts().CPlusPlus && !DiagnosedMixedDesignator && | |||
7656 | isa<DesignatedInitExpr>(InitArgList[0])) { | |||
7657 | DiagnosedMixedDesignator = true; | |||
7658 | auto *DIE = cast<DesignatedInitExpr>(InitArgList[0]); | |||
7659 | Diag(DIE->getBeginLoc(), diag::ext_designated_init_mixed) | |||
7660 | << DIE->getSourceRange(); | |||
7661 | Diag(InitArgList[I]->getBeginLoc(), diag::note_designated_init_mixed) | |||
7662 | << InitArgList[I]->getSourceRange(); | |||
7663 | } | |||
7664 | } | |||
7665 | ||||
7666 | if (FirstDesignator.isValid()) { | |||
7667 | // Only diagnose designated initiaization as a C++20 extension if we didn't | |||
7668 | // already diagnose use of (non-C++20) C99 designator syntax. | |||
7669 | if (getLangOpts().CPlusPlus && !DiagnosedArrayDesignator && | |||
7670 | !DiagnosedNestedDesignator && !DiagnosedMixedDesignator) { | |||
7671 | Diag(FirstDesignator, getLangOpts().CPlusPlus20 | |||
7672 | ? diag::warn_cxx17_compat_designated_init | |||
7673 | : diag::ext_cxx_designated_init); | |||
7674 | } else if (!getLangOpts().CPlusPlus && !getLangOpts().C99) { | |||
7675 | Diag(FirstDesignator, diag::ext_designated_init); | |||
7676 | } | |||
7677 | } | |||
7678 | ||||
7679 | return BuildInitList(LBraceLoc, InitArgList, RBraceLoc); | |||
7680 | } | |||
7681 | ||||
7682 | ExprResult | |||
7683 | Sema::BuildInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList, | |||
7684 | SourceLocation RBraceLoc) { | |||
7685 | // Semantic analysis for initializers is done by ActOnDeclarator() and | |||
7686 | // CheckInitializer() - it requires knowledge of the object being initialized. | |||
7687 | ||||
7688 | // Immediately handle non-overload placeholders. Overloads can be | |||
7689 | // resolved contextually, but everything else here can't. | |||
7690 | for (unsigned I = 0, E = InitArgList.size(); I != E; ++I) { | |||
7691 | if (InitArgList[I]->getType()->isNonOverloadPlaceholderType()) { | |||
7692 | ExprResult result = CheckPlaceholderExpr(InitArgList[I]); | |||
7693 | ||||
7694 | // Ignore failures; dropping the entire initializer list because | |||
7695 | // of one failure would be terrible for indexing/etc. | |||
7696 | if (result.isInvalid()) continue; | |||
7697 | ||||
7698 | InitArgList[I] = result.get(); | |||
7699 | } | |||
7700 | } | |||
7701 | ||||
7702 | InitListExpr *E = new (Context) InitListExpr(Context, LBraceLoc, InitArgList, | |||
7703 | RBraceLoc); | |||
7704 | E->setType(Context.VoidTy); // FIXME: just a place holder for now. | |||
7705 | return E; | |||
7706 | } | |||
7707 | ||||
7708 | /// Do an explicit extend of the given block pointer if we're in ARC. | |||
7709 | void Sema::maybeExtendBlockObject(ExprResult &E) { | |||
7710 | assert(E.get()->getType()->isBlockPointerType())(static_cast <bool> (E.get()->getType()->isBlockPointerType ()) ? void (0) : __assert_fail ("E.get()->getType()->isBlockPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 7710, __extension__ __PRETTY_FUNCTION__ )); | |||
7711 | assert(E.get()->isPRValue())(static_cast <bool> (E.get()->isPRValue()) ? void (0 ) : __assert_fail ("E.get()->isPRValue()", "clang/lib/Sema/SemaExpr.cpp" , 7711, __extension__ __PRETTY_FUNCTION__)); | |||
7712 | ||||
7713 | // Only do this in an r-value context. | |||
7714 | if (!getLangOpts().ObjCAutoRefCount) return; | |||
7715 | ||||
7716 | E = ImplicitCastExpr::Create( | |||
7717 | Context, E.get()->getType(), CK_ARCExtendBlockObject, E.get(), | |||
7718 | /*base path*/ nullptr, VK_PRValue, FPOptionsOverride()); | |||
7719 | Cleanup.setExprNeedsCleanups(true); | |||
7720 | } | |||
7721 | ||||
7722 | /// Prepare a conversion of the given expression to an ObjC object | |||
7723 | /// pointer type. | |||
7724 | CastKind Sema::PrepareCastToObjCObjectPointer(ExprResult &E) { | |||
7725 | QualType type = E.get()->getType(); | |||
7726 | if (type->isObjCObjectPointerType()) { | |||
7727 | return CK_BitCast; | |||
7728 | } else if (type->isBlockPointerType()) { | |||
7729 | maybeExtendBlockObject(E); | |||
7730 | return CK_BlockPointerToObjCPointerCast; | |||
7731 | } else { | |||
7732 | assert(type->isPointerType())(static_cast <bool> (type->isPointerType()) ? void ( 0) : __assert_fail ("type->isPointerType()", "clang/lib/Sema/SemaExpr.cpp" , 7732, __extension__ __PRETTY_FUNCTION__)); | |||
7733 | return CK_CPointerToObjCPointerCast; | |||
7734 | } | |||
7735 | } | |||
7736 | ||||
7737 | /// Prepares for a scalar cast, performing all the necessary stages | |||
7738 | /// except the final cast and returning the kind required. | |||
7739 | CastKind Sema::PrepareScalarCast(ExprResult &Src, QualType DestTy) { | |||
7740 | // Both Src and Dest are scalar types, i.e. arithmetic or pointer. | |||
7741 | // Also, callers should have filtered out the invalid cases with | |||
7742 | // pointers. Everything else should be possible. | |||
7743 | ||||
7744 | QualType SrcTy = Src.get()->getType(); | |||
7745 | if (Context.hasSameUnqualifiedType(SrcTy, DestTy)) | |||
7746 | return CK_NoOp; | |||
7747 | ||||
7748 | switch (Type::ScalarTypeKind SrcKind = SrcTy->getScalarTypeKind()) { | |||
7749 | case Type::STK_MemberPointer: | |||
7750 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "clang/lib/Sema/SemaExpr.cpp", 7750); | |||
7751 | ||||
7752 | case Type::STK_CPointer: | |||
7753 | case Type::STK_BlockPointer: | |||
7754 | case Type::STK_ObjCObjectPointer: | |||
7755 | switch (DestTy->getScalarTypeKind()) { | |||
7756 | case Type::STK_CPointer: { | |||
7757 | LangAS SrcAS = SrcTy->getPointeeType().getAddressSpace(); | |||
7758 | LangAS DestAS = DestTy->getPointeeType().getAddressSpace(); | |||
7759 | if (SrcAS != DestAS) | |||
7760 | return CK_AddressSpaceConversion; | |||
7761 | if (Context.hasCvrSimilarType(SrcTy, DestTy)) | |||
7762 | return CK_NoOp; | |||
7763 | return CK_BitCast; | |||
7764 | } | |||
7765 | case Type::STK_BlockPointer: | |||
7766 | return (SrcKind == Type::STK_BlockPointer | |||
7767 | ? CK_BitCast : CK_AnyPointerToBlockPointerCast); | |||
7768 | case Type::STK_ObjCObjectPointer: | |||
7769 | if (SrcKind == Type::STK_ObjCObjectPointer) | |||
7770 | return CK_BitCast; | |||
7771 | if (SrcKind == Type::STK_CPointer) | |||
7772 | return CK_CPointerToObjCPointerCast; | |||
7773 | maybeExtendBlockObject(Src); | |||
7774 | return CK_BlockPointerToObjCPointerCast; | |||
7775 | case Type::STK_Bool: | |||
7776 | return CK_PointerToBoolean; | |||
7777 | case Type::STK_Integral: | |||
7778 | return CK_PointerToIntegral; | |||
7779 | case Type::STK_Floating: | |||
7780 | case Type::STK_FloatingComplex: | |||
7781 | case Type::STK_IntegralComplex: | |||
7782 | case Type::STK_MemberPointer: | |||
7783 | case Type::STK_FixedPoint: | |||
7784 | llvm_unreachable("illegal cast from pointer")::llvm::llvm_unreachable_internal("illegal cast from pointer" , "clang/lib/Sema/SemaExpr.cpp", 7784); | |||
7785 | } | |||
7786 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7786); | |||
7787 | ||||
7788 | case Type::STK_FixedPoint: | |||
7789 | switch (DestTy->getScalarTypeKind()) { | |||
7790 | case Type::STK_FixedPoint: | |||
7791 | return CK_FixedPointCast; | |||
7792 | case Type::STK_Bool: | |||
7793 | return CK_FixedPointToBoolean; | |||
7794 | case Type::STK_Integral: | |||
7795 | return CK_FixedPointToIntegral; | |||
7796 | case Type::STK_Floating: | |||
7797 | return CK_FixedPointToFloating; | |||
7798 | case Type::STK_IntegralComplex: | |||
7799 | case Type::STK_FloatingComplex: | |||
7800 | Diag(Src.get()->getExprLoc(), | |||
7801 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7802 | << DestTy; | |||
7803 | return CK_IntegralCast; | |||
7804 | case Type::STK_CPointer: | |||
7805 | case Type::STK_ObjCObjectPointer: | |||
7806 | case Type::STK_BlockPointer: | |||
7807 | case Type::STK_MemberPointer: | |||
7808 | llvm_unreachable("illegal cast to pointer type")::llvm::llvm_unreachable_internal("illegal cast to pointer type" , "clang/lib/Sema/SemaExpr.cpp", 7808); | |||
7809 | } | |||
7810 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7810); | |||
7811 | ||||
7812 | case Type::STK_Bool: // casting from bool is like casting from an integer | |||
7813 | case Type::STK_Integral: | |||
7814 | switch (DestTy->getScalarTypeKind()) { | |||
7815 | case Type::STK_CPointer: | |||
7816 | case Type::STK_ObjCObjectPointer: | |||
7817 | case Type::STK_BlockPointer: | |||
7818 | if (Src.get()->isNullPointerConstant(Context, | |||
7819 | Expr::NPC_ValueDependentIsNull)) | |||
7820 | return CK_NullToPointer; | |||
7821 | return CK_IntegralToPointer; | |||
7822 | case Type::STK_Bool: | |||
7823 | return CK_IntegralToBoolean; | |||
7824 | case Type::STK_Integral: | |||
7825 | return CK_IntegralCast; | |||
7826 | case Type::STK_Floating: | |||
7827 | return CK_IntegralToFloating; | |||
7828 | case Type::STK_IntegralComplex: | |||
7829 | Src = ImpCastExprToType(Src.get(), | |||
7830 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7831 | CK_IntegralCast); | |||
7832 | return CK_IntegralRealToComplex; | |||
7833 | case Type::STK_FloatingComplex: | |||
7834 | Src = ImpCastExprToType(Src.get(), | |||
7835 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7836 | CK_IntegralToFloating); | |||
7837 | return CK_FloatingRealToComplex; | |||
7838 | case Type::STK_MemberPointer: | |||
7839 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "clang/lib/Sema/SemaExpr.cpp", 7839); | |||
7840 | case Type::STK_FixedPoint: | |||
7841 | return CK_IntegralToFixedPoint; | |||
7842 | } | |||
7843 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7843); | |||
7844 | ||||
7845 | case Type::STK_Floating: | |||
7846 | switch (DestTy->getScalarTypeKind()) { | |||
7847 | case Type::STK_Floating: | |||
7848 | return CK_FloatingCast; | |||
7849 | case Type::STK_Bool: | |||
7850 | return CK_FloatingToBoolean; | |||
7851 | case Type::STK_Integral: | |||
7852 | return CK_FloatingToIntegral; | |||
7853 | case Type::STK_FloatingComplex: | |||
7854 | Src = ImpCastExprToType(Src.get(), | |||
7855 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7856 | CK_FloatingCast); | |||
7857 | return CK_FloatingRealToComplex; | |||
7858 | case Type::STK_IntegralComplex: | |||
7859 | Src = ImpCastExprToType(Src.get(), | |||
7860 | DestTy->castAs<ComplexType>()->getElementType(), | |||
7861 | CK_FloatingToIntegral); | |||
7862 | return CK_IntegralRealToComplex; | |||
7863 | case Type::STK_CPointer: | |||
7864 | case Type::STK_ObjCObjectPointer: | |||
7865 | case Type::STK_BlockPointer: | |||
7866 | llvm_unreachable("valid float->pointer cast?")::llvm::llvm_unreachable_internal("valid float->pointer cast?" , "clang/lib/Sema/SemaExpr.cpp", 7866); | |||
7867 | case Type::STK_MemberPointer: | |||
7868 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "clang/lib/Sema/SemaExpr.cpp", 7868); | |||
7869 | case Type::STK_FixedPoint: | |||
7870 | return CK_FloatingToFixedPoint; | |||
7871 | } | |||
7872 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7872); | |||
7873 | ||||
7874 | case Type::STK_FloatingComplex: | |||
7875 | switch (DestTy->getScalarTypeKind()) { | |||
7876 | case Type::STK_FloatingComplex: | |||
7877 | return CK_FloatingComplexCast; | |||
7878 | case Type::STK_IntegralComplex: | |||
7879 | return CK_FloatingComplexToIntegralComplex; | |||
7880 | case Type::STK_Floating: { | |||
7881 | QualType ET = SrcTy->castAs<ComplexType>()->getElementType(); | |||
7882 | if (Context.hasSameType(ET, DestTy)) | |||
7883 | return CK_FloatingComplexToReal; | |||
7884 | Src = ImpCastExprToType(Src.get(), ET, CK_FloatingComplexToReal); | |||
7885 | return CK_FloatingCast; | |||
7886 | } | |||
7887 | case Type::STK_Bool: | |||
7888 | return CK_FloatingComplexToBoolean; | |||
7889 | case Type::STK_Integral: | |||
7890 | Src = ImpCastExprToType(Src.get(), | |||
7891 | SrcTy->castAs<ComplexType>()->getElementType(), | |||
7892 | CK_FloatingComplexToReal); | |||
7893 | return CK_FloatingToIntegral; | |||
7894 | case Type::STK_CPointer: | |||
7895 | case Type::STK_ObjCObjectPointer: | |||
7896 | case Type::STK_BlockPointer: | |||
7897 | llvm_unreachable("valid complex float->pointer cast?")::llvm::llvm_unreachable_internal("valid complex float->pointer cast?" , "clang/lib/Sema/SemaExpr.cpp", 7897); | |||
7898 | case Type::STK_MemberPointer: | |||
7899 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "clang/lib/Sema/SemaExpr.cpp", 7899); | |||
7900 | case Type::STK_FixedPoint: | |||
7901 | Diag(Src.get()->getExprLoc(), | |||
7902 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7903 | << SrcTy; | |||
7904 | return CK_IntegralCast; | |||
7905 | } | |||
7906 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7906); | |||
7907 | ||||
7908 | case Type::STK_IntegralComplex: | |||
7909 | switch (DestTy->getScalarTypeKind()) { | |||
7910 | case Type::STK_FloatingComplex: | |||
7911 | return CK_IntegralComplexToFloatingComplex; | |||
7912 | case Type::STK_IntegralComplex: | |||
7913 | return CK_IntegralComplexCast; | |||
7914 | case Type::STK_Integral: { | |||
7915 | QualType ET = SrcTy->castAs<ComplexType>()->getElementType(); | |||
7916 | if (Context.hasSameType(ET, DestTy)) | |||
7917 | return CK_IntegralComplexToReal; | |||
7918 | Src = ImpCastExprToType(Src.get(), ET, CK_IntegralComplexToReal); | |||
7919 | return CK_IntegralCast; | |||
7920 | } | |||
7921 | case Type::STK_Bool: | |||
7922 | return CK_IntegralComplexToBoolean; | |||
7923 | case Type::STK_Floating: | |||
7924 | Src = ImpCastExprToType(Src.get(), | |||
7925 | SrcTy->castAs<ComplexType>()->getElementType(), | |||
7926 | CK_IntegralComplexToReal); | |||
7927 | return CK_IntegralToFloating; | |||
7928 | case Type::STK_CPointer: | |||
7929 | case Type::STK_ObjCObjectPointer: | |||
7930 | case Type::STK_BlockPointer: | |||
7931 | llvm_unreachable("valid complex int->pointer cast?")::llvm::llvm_unreachable_internal("valid complex int->pointer cast?" , "clang/lib/Sema/SemaExpr.cpp", 7931); | |||
7932 | case Type::STK_MemberPointer: | |||
7933 | llvm_unreachable("member pointer type in C")::llvm::llvm_unreachable_internal("member pointer type in C", "clang/lib/Sema/SemaExpr.cpp", 7933); | |||
7934 | case Type::STK_FixedPoint: | |||
7935 | Diag(Src.get()->getExprLoc(), | |||
7936 | diag::err_unimplemented_conversion_with_fixed_point_type) | |||
7937 | << SrcTy; | |||
7938 | return CK_IntegralCast; | |||
7939 | } | |||
7940 | llvm_unreachable("Should have returned before this")::llvm::llvm_unreachable_internal("Should have returned before this" , "clang/lib/Sema/SemaExpr.cpp", 7940); | |||
7941 | } | |||
7942 | ||||
7943 | llvm_unreachable("Unhandled scalar cast")::llvm::llvm_unreachable_internal("Unhandled scalar cast", "clang/lib/Sema/SemaExpr.cpp" , 7943); | |||
7944 | } | |||
7945 | ||||
7946 | static bool breakDownVectorType(QualType type, uint64_t &len, | |||
7947 | QualType &eltType) { | |||
7948 | // Vectors are simple. | |||
7949 | if (const VectorType *vecType = type->getAs<VectorType>()) { | |||
7950 | len = vecType->getNumElements(); | |||
7951 | eltType = vecType->getElementType(); | |||
7952 | assert(eltType->isScalarType())(static_cast <bool> (eltType->isScalarType()) ? void (0) : __assert_fail ("eltType->isScalarType()", "clang/lib/Sema/SemaExpr.cpp" , 7952, __extension__ __PRETTY_FUNCTION__)); | |||
7953 | return true; | |||
7954 | } | |||
7955 | ||||
7956 | // We allow lax conversion to and from non-vector types, but only if | |||
7957 | // they're real types (i.e. non-complex, non-pointer scalar types). | |||
7958 | if (!type->isRealType()) return false; | |||
7959 | ||||
7960 | len = 1; | |||
7961 | eltType = type; | |||
7962 | return true; | |||
7963 | } | |||
7964 | ||||
7965 | /// Are the two types SVE-bitcast-compatible types? I.e. is bitcasting from the | |||
7966 | /// first SVE type (e.g. an SVE VLAT) to the second type (e.g. an SVE VLST) | |||
7967 | /// allowed? | |||
7968 | /// | |||
7969 | /// This will also return false if the two given types do not make sense from | |||
7970 | /// the perspective of SVE bitcasts. | |||
7971 | bool Sema::isValidSveBitcast(QualType srcTy, QualType destTy) { | |||
7972 | assert(srcTy->isVectorType() || destTy->isVectorType())(static_cast <bool> (srcTy->isVectorType() || destTy ->isVectorType()) ? void (0) : __assert_fail ("srcTy->isVectorType() || destTy->isVectorType()" , "clang/lib/Sema/SemaExpr.cpp", 7972, __extension__ __PRETTY_FUNCTION__ )); | |||
7973 | ||||
7974 | auto ValidScalableConversion = [](QualType FirstType, QualType SecondType) { | |||
7975 | if (!FirstType->isSVESizelessBuiltinType()) | |||
7976 | return false; | |||
7977 | ||||
7978 | const auto *VecTy = SecondType->getAs<VectorType>(); | |||
7979 | return VecTy && | |||
7980 | VecTy->getVectorKind() == VectorType::SveFixedLengthDataVector; | |||
7981 | }; | |||
7982 | ||||
7983 | return ValidScalableConversion(srcTy, destTy) || | |||
7984 | ValidScalableConversion(destTy, srcTy); | |||
7985 | } | |||
7986 | ||||
7987 | /// Are the two types RVV-bitcast-compatible types? I.e. is bitcasting from the | |||
7988 | /// first RVV type (e.g. an RVV scalable type) to the second type (e.g. an RVV | |||
7989 | /// VLS type) allowed? | |||
7990 | /// | |||
7991 | /// This will also return false if the two given types do not make sense from | |||
7992 | /// the perspective of RVV bitcasts. | |||
7993 | bool Sema::isValidRVVBitcast(QualType srcTy, QualType destTy) { | |||
7994 | assert(srcTy->isVectorType() || destTy->isVectorType())(static_cast <bool> (srcTy->isVectorType() || destTy ->isVectorType()) ? void (0) : __assert_fail ("srcTy->isVectorType() || destTy->isVectorType()" , "clang/lib/Sema/SemaExpr.cpp", 7994, __extension__ __PRETTY_FUNCTION__ )); | |||
7995 | ||||
7996 | auto ValidScalableConversion = [](QualType FirstType, QualType SecondType) { | |||
7997 | if (!FirstType->isRVVSizelessBuiltinType()) | |||
7998 | return false; | |||
7999 | ||||
8000 | const auto *VecTy = SecondType->getAs<VectorType>(); | |||
8001 | return VecTy && | |||
8002 | VecTy->getVectorKind() == VectorType::RVVFixedLengthDataVector; | |||
8003 | }; | |||
8004 | ||||
8005 | return ValidScalableConversion(srcTy, destTy) || | |||
8006 | ValidScalableConversion(destTy, srcTy); | |||
8007 | } | |||
8008 | ||||
8009 | /// Are the two types matrix types and do they have the same dimensions i.e. | |||
8010 | /// do they have the same number of rows and the same number of columns? | |||
8011 | bool Sema::areMatrixTypesOfTheSameDimension(QualType srcTy, QualType destTy) { | |||
8012 | if (!destTy->isMatrixType() || !srcTy->isMatrixType()) | |||
8013 | return false; | |||
8014 | ||||
8015 | const ConstantMatrixType *matSrcType = srcTy->getAs<ConstantMatrixType>(); | |||
8016 | const ConstantMatrixType *matDestType = destTy->getAs<ConstantMatrixType>(); | |||
8017 | ||||
8018 | return matSrcType->getNumRows() == matDestType->getNumRows() && | |||
| ||||
8019 | matSrcType->getNumColumns() == matDestType->getNumColumns(); | |||
8020 | } | |||
8021 | ||||
8022 | bool Sema::areVectorTypesSameSize(QualType SrcTy, QualType DestTy) { | |||
8023 | assert(DestTy->isVectorType() || SrcTy->isVectorType())(static_cast <bool> (DestTy->isVectorType() || SrcTy ->isVectorType()) ? void (0) : __assert_fail ("DestTy->isVectorType() || SrcTy->isVectorType()" , "clang/lib/Sema/SemaExpr.cpp", 8023, __extension__ __PRETTY_FUNCTION__ )); | |||
8024 | ||||
8025 | uint64_t SrcLen, DestLen; | |||
8026 | QualType SrcEltTy, DestEltTy; | |||
8027 | if (!breakDownVectorType(SrcTy, SrcLen, SrcEltTy)) | |||
8028 | return false; | |||
8029 | if (!breakDownVectorType(DestTy, DestLen, DestEltTy)) | |||
8030 | return false; | |||
8031 | ||||
8032 | // ASTContext::getTypeSize will return the size rounded up to a | |||
8033 | // power of 2, so instead of using that, we need to use the raw | |||
8034 | // element size multiplied by the element count. | |||
8035 | uint64_t SrcEltSize = Context.getTypeSize(SrcEltTy); | |||
8036 | uint64_t DestEltSize = Context.getTypeSize(DestEltTy); | |||
8037 | ||||
8038 | return (SrcLen * SrcEltSize == DestLen * DestEltSize); | |||
8039 | } | |||
8040 | ||||
8041 | // This returns true if at least one of the types is an altivec vector. | |||
8042 | bool Sema::anyAltivecTypes(QualType SrcTy, QualType DestTy) { | |||
8043 | assert((DestTy->isVectorType() || SrcTy->isVectorType()) &&(static_cast <bool> ((DestTy->isVectorType() || SrcTy ->isVectorType()) && "expected at least one type to be a vector here" ) ? void (0) : __assert_fail ("(DestTy->isVectorType() || SrcTy->isVectorType()) && \"expected at least one type to be a vector here\"" , "clang/lib/Sema/SemaExpr.cpp", 8044, __extension__ __PRETTY_FUNCTION__ )) | |||
8044 | "expected at least one type to be a vector here")(static_cast <bool> ((DestTy->isVectorType() || SrcTy ->isVectorType()) && "expected at least one type to be a vector here" ) ? void (0) : __assert_fail ("(DestTy->isVectorType() || SrcTy->isVectorType()) && \"expected at least one type to be a vector here\"" , "clang/lib/Sema/SemaExpr.cpp", 8044, __extension__ __PRETTY_FUNCTION__ )); | |||
8045 | ||||
8046 | bool IsSrcTyAltivec = | |||
8047 | SrcTy->isVectorType() && ((SrcTy->castAs<VectorType>()->getVectorKind() == | |||
8048 | VectorType::AltiVecVector) || | |||
8049 | (SrcTy->castAs<VectorType>()->getVectorKind() == | |||
8050 | VectorType::AltiVecBool) || | |||
8051 | (SrcTy->castAs<VectorType>()->getVectorKind() == | |||
8052 | VectorType::AltiVecPixel)); | |||
8053 | ||||
8054 | bool IsDestTyAltivec = DestTy->isVectorType() && | |||
8055 | ((DestTy->castAs<VectorType>()->getVectorKind() == | |||
8056 | VectorType::AltiVecVector) || | |||
8057 | (DestTy->castAs<VectorType>()->getVectorKind() == | |||
8058 | VectorType::AltiVecBool) || | |||
8059 | (DestTy->castAs<VectorType>()->getVectorKind() == | |||
8060 | VectorType::AltiVecPixel)); | |||
8061 | ||||
8062 | return (IsSrcTyAltivec || IsDestTyAltivec); | |||
8063 | } | |||
8064 | ||||
8065 | /// Are the two types lax-compatible vector types? That is, given | |||
8066 | /// that one of them is a vector, do they have equal storage sizes, | |||
8067 | /// where the storage size is the number of elements times the element | |||
8068 | /// size? | |||
8069 | /// | |||
8070 | /// This will also return false if either of the types is neither a | |||
8071 | /// vector nor a real type. | |||
8072 | bool Sema::areLaxCompatibleVectorTypes(QualType srcTy, QualType destTy) { | |||
8073 | assert(destTy->isVectorType() || srcTy->isVectorType())(static_cast <bool> (destTy->isVectorType() || srcTy ->isVectorType()) ? void (0) : __assert_fail ("destTy->isVectorType() || srcTy->isVectorType()" , "clang/lib/Sema/SemaExpr.cpp", 8073, __extension__ __PRETTY_FUNCTION__ )); | |||
8074 | ||||
8075 | // Disallow lax conversions between scalars and ExtVectors (these | |||
8076 | // conversions are allowed for other vector types because common headers | |||
8077 | // depend on them). Most scalar OP ExtVector cases are handled by the | |||
8078 | // splat path anyway, which does what we want (convert, not bitcast). | |||
8079 | // What this rules out for ExtVectors is crazy things like char4*float. | |||
8080 | if (srcTy->isScalarType() && destTy->isExtVectorType()) return false; | |||
8081 | if (destTy->isScalarType() && srcTy->isExtVectorType()) return false; | |||
8082 | ||||
8083 | return areVectorTypesSameSize(srcTy, destTy); | |||
8084 | } | |||
8085 | ||||
8086 | /// Is this a legal conversion between two types, one of which is | |||
8087 | /// known to be a vector type? | |||
8088 | bool Sema::isLaxVectorConversion(QualType srcTy, QualType destTy) { | |||
8089 | assert(destTy->isVectorType() || srcTy->isVectorType())(static_cast <bool> (destTy->isVectorType() || srcTy ->isVectorType()) ? void (0) : __assert_fail ("destTy->isVectorType() || srcTy->isVectorType()" , "clang/lib/Sema/SemaExpr.cpp", 8089, __extension__ __PRETTY_FUNCTION__ )); | |||
8090 | ||||
8091 | switch (Context.getLangOpts().getLaxVectorConversions()) { | |||
8092 | case LangOptions::LaxVectorConversionKind::None: | |||
8093 | return false; | |||
8094 | ||||
8095 | case LangOptions::LaxVectorConversionKind::Integer: | |||
8096 | if (!srcTy->isIntegralOrEnumerationType()) { | |||
8097 | auto *Vec = srcTy->getAs<VectorType>(); | |||
8098 | if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType()) | |||
8099 | return false; | |||
8100 | } | |||
8101 | if (!destTy->isIntegralOrEnumerationType()) { | |||
8102 | auto *Vec = destTy->getAs<VectorType>(); | |||
8103 | if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType()) | |||
8104 | return false; | |||
8105 | } | |||
8106 | // OK, integer (vector) -> integer (vector) bitcast. | |||
8107 | break; | |||
8108 | ||||
8109 | case LangOptions::LaxVectorConversionKind::All: | |||
8110 | break; | |||
8111 | } | |||
8112 | ||||
8113 | return areLaxCompatibleVectorTypes(srcTy, destTy); | |||
8114 | } | |||
8115 | ||||
8116 | bool Sema::CheckMatrixCast(SourceRange R, QualType DestTy, QualType SrcTy, | |||
8117 | CastKind &Kind) { | |||
8118 | if (SrcTy->isMatrixType() && DestTy->isMatrixType()) { | |||
| ||||
8119 | if (!areMatrixTypesOfTheSameDimension(SrcTy, DestTy)) { | |||
8120 | return Diag(R.getBegin(), diag::err_invalid_conversion_between_matrixes) | |||
8121 | << DestTy << SrcTy << R; | |||
8122 | } | |||
8123 | } else if (SrcTy->isMatrixType()) { | |||
8124 | return Diag(R.getBegin(), | |||
8125 | diag::err_invalid_conversion_between_matrix_and_type) | |||
8126 | << SrcTy << DestTy << R; | |||
8127 | } else if (DestTy->isMatrixType()) { | |||
8128 | return Diag(R.getBegin(), | |||
8129 | diag::err_invalid_conversion_between_matrix_and_type) | |||
8130 | << DestTy << SrcTy << R; | |||
8131 | } | |||
8132 | ||||
8133 | Kind = CK_MatrixCast; | |||
8134 | return false; | |||
8135 | } | |||
8136 | ||||
8137 | bool Sema::CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, | |||
8138 | CastKind &Kind) { | |||
8139 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 8139, __extension__ __PRETTY_FUNCTION__ )); | |||
8140 | ||||
8141 | if (Ty->isVectorType() || Ty->isIntegralType(Context)) { | |||
8142 | if (!areLaxCompatibleVectorTypes(Ty, VectorTy)) | |||
8143 | return Diag(R.getBegin(), | |||
8144 | Ty->isVectorType() ? | |||
8145 | diag::err_invalid_conversion_between_vectors : | |||
8146 | diag::err_invalid_conversion_between_vector_and_integer) | |||
8147 | << VectorTy << Ty << R; | |||
8148 | } else | |||
8149 | return Diag(R.getBegin(), | |||
8150 | diag::err_invalid_conversion_between_vector_and_scalar) | |||
8151 | << VectorTy << Ty << R; | |||
8152 | ||||
8153 | Kind = CK_BitCast; | |||
8154 | return false; | |||
8155 | } | |||
8156 | ||||
8157 | ExprResult Sema::prepareVectorSplat(QualType VectorTy, Expr *SplattedExpr) { | |||
8158 | QualType DestElemTy = VectorTy->castAs<VectorType>()->getElementType(); | |||
8159 | ||||
8160 | if (DestElemTy == SplattedExpr->getType()) | |||
8161 | return SplattedExpr; | |||
8162 | ||||
8163 | assert(DestElemTy->isFloatingType() ||(static_cast <bool> (DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()) ? void (0) : __assert_fail ("DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()" , "clang/lib/Sema/SemaExpr.cpp", 8164, __extension__ __PRETTY_FUNCTION__ )) | |||
8164 | DestElemTy->isIntegralOrEnumerationType())(static_cast <bool> (DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()) ? void (0) : __assert_fail ("DestElemTy->isFloatingType() || DestElemTy->isIntegralOrEnumerationType()" , "clang/lib/Sema/SemaExpr.cpp", 8164, __extension__ __PRETTY_FUNCTION__ )); | |||
8165 | ||||
8166 | CastKind CK; | |||
8167 | if (VectorTy->isExtVectorType() && SplattedExpr->getType()->isBooleanType()) { | |||
8168 | // OpenCL requires that we convert `true` boolean expressions to -1, but | |||
8169 | // only when splatting vectors. | |||
8170 | if (DestElemTy->isFloatingType()) { | |||
8171 | // To avoid having to have a CK_BooleanToSignedFloating cast kind, we cast | |||
8172 | // in two steps: boolean to signed integral, then to floating. | |||
8173 | ExprResult CastExprRes = ImpCastExprToType(SplattedExpr, Context.IntTy, | |||
8174 | CK_BooleanToSignedIntegral); | |||
8175 | SplattedExpr = CastExprRes.get(); | |||
8176 | CK = CK_IntegralToFloating; | |||
8177 | } else { | |||
8178 | CK = CK_BooleanToSignedIntegral; | |||
8179 | } | |||
8180 | } else { | |||
8181 | ExprResult CastExprRes = SplattedExpr; | |||
8182 | CK = PrepareScalarCast(CastExprRes, DestElemTy); | |||
8183 | if (CastExprRes.isInvalid()) | |||
8184 | return ExprError(); | |||
8185 | SplattedExpr = CastExprRes.get(); | |||
8186 | } | |||
8187 | return ImpCastExprToType(SplattedExpr, DestElemTy, CK); | |||
8188 | } | |||
8189 | ||||
8190 | ExprResult Sema::CheckExtVectorCast(SourceRange R, QualType DestTy, | |||
8191 | Expr *CastExpr, CastKind &Kind) { | |||
8192 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 8192, __extension__ __PRETTY_FUNCTION__ )); | |||
8193 | ||||
8194 | QualType SrcTy = CastExpr->getType(); | |||
8195 | ||||
8196 | // If SrcTy is a VectorType, the total size must match to explicitly cast to | |||
8197 | // an ExtVectorType. | |||
8198 | // In OpenCL, casts between vectors of different types are not allowed. | |||
8199 | // (See OpenCL 6.2). | |||
8200 | if (SrcTy->isVectorType()) { | |||
8201 | if (!areLaxCompatibleVectorTypes(SrcTy, DestTy) || | |||
8202 | (getLangOpts().OpenCL && | |||
8203 | !Context.hasSameUnqualifiedType(DestTy, SrcTy))) { | |||
8204 | Diag(R.getBegin(),diag::err_invalid_conversion_between_ext_vectors) | |||
8205 | << DestTy << SrcTy << R; | |||
8206 | return ExprError(); | |||
8207 | } | |||
8208 | Kind = CK_BitCast; | |||
8209 | return CastExpr; | |||
8210 | } | |||
8211 | ||||
8212 | // All non-pointer scalars can be cast to ExtVector type. The appropriate | |||
8213 | // conversion will take place first from scalar to elt type, and then | |||
8214 | // splat from elt type to vector. | |||
8215 | if (SrcTy->isPointerType()) | |||
8216 | return Diag(R.getBegin(), | |||
8217 | diag::err_invalid_conversion_between_vector_and_scalar) | |||
8218 | << DestTy << SrcTy << R; | |||
8219 | ||||
8220 | Kind = CK_VectorSplat; | |||
8221 | return prepareVectorSplat(DestTy, CastExpr); | |||
8222 | } | |||
8223 | ||||
8224 | ExprResult | |||
8225 | Sema::ActOnCastExpr(Scope *S, SourceLocation LParenLoc, | |||
8226 | Declarator &D, ParsedType &Ty, | |||
8227 | SourceLocation RParenLoc, Expr *CastExpr) { | |||
8228 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 8229, __extension__ __PRETTY_FUNCTION__ )) | |||
8229 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 8229, __extension__ __PRETTY_FUNCTION__ )); | |||
8230 | ||||
8231 | TypeSourceInfo *castTInfo = GetTypeForDeclaratorCast(D, CastExpr->getType()); | |||
8232 | if (D.isInvalidType()) | |||
8233 | return ExprError(); | |||
8234 | ||||
8235 | if (getLangOpts().CPlusPlus) { | |||
8236 | // Check that there are no default arguments (C++ only). | |||
8237 | CheckExtraCXXDefaultArguments(D); | |||
8238 | } else { | |||
8239 | // Make sure any TypoExprs have been dealt with. | |||
8240 | ExprResult Res = CorrectDelayedTyposInExpr(CastExpr); | |||
8241 | if (!Res.isUsable()) | |||
8242 | return ExprError(); | |||
8243 | CastExpr = Res.get(); | |||
8244 | } | |||
8245 | ||||
8246 | checkUnusedDeclAttributes(D); | |||
8247 | ||||
8248 | QualType castType = castTInfo->getType(); | |||
8249 | Ty = CreateParsedType(castType, castTInfo); | |||
8250 | ||||
8251 | bool isVectorLiteral = false; | |||
8252 | ||||
8253 | // Check for an altivec or OpenCL literal, | |||
8254 | // i.e. all the elements are integer constants. | |||
8255 | ParenExpr *PE = dyn_cast<ParenExpr>(CastExpr); | |||
8256 | ParenListExpr *PLE = dyn_cast<ParenListExpr>(CastExpr); | |||
8257 | if ((getLangOpts().AltiVec || getLangOpts().ZVector || getLangOpts().OpenCL) | |||
8258 | && castType->isVectorType() && (PE || PLE)) { | |||
8259 | if (PLE && PLE->getNumExprs() == 0) { | |||
8260 | Diag(PLE->getExprLoc(), diag::err_altivec_empty_initializer); | |||
8261 | return ExprError(); | |||
8262 | } | |||
8263 | if (PE || PLE->getNumExprs() == 1) { | |||
8264 | Expr *E = (PE ? PE->getSubExpr() : PLE->getExpr(0)); | |||
8265 | if (!E->isTypeDependent() && !E->getType()->isVectorType()) | |||
8266 | isVectorLiteral = true; | |||
8267 | } | |||
8268 | else | |||
8269 | isVectorLiteral = true; | |||
8270 | } | |||
8271 | ||||
8272 | // If this is a vector initializer, '(' type ')' '(' init, ..., init ')' | |||
8273 | // then handle it as such. | |||
8274 | if (isVectorLiteral) | |||
8275 | return BuildVectorLiteral(LParenLoc, RParenLoc, CastExpr, castTInfo); | |||
8276 | ||||
8277 | // If the Expr being casted is a ParenListExpr, handle it specially. | |||
8278 | // This is not an AltiVec-style cast, so turn the ParenListExpr into a | |||
8279 | // sequence of BinOp comma operators. | |||
8280 | if (isa<ParenListExpr>(CastExpr)) { | |||
8281 | ExprResult Result = MaybeConvertParenListExprToParenExpr(S, CastExpr); | |||
8282 | if (Result.isInvalid()) return ExprError(); | |||
8283 | CastExpr = Result.get(); | |||
8284 | } | |||
8285 | ||||
8286 | if (getLangOpts().CPlusPlus && !castType->isVoidType()) | |||
8287 | Diag(LParenLoc, diag::warn_old_style_cast) << CastExpr->getSourceRange(); | |||
8288 | ||||
8289 | CheckTollFreeBridgeCast(castType, CastExpr); | |||
8290 | ||||
8291 | CheckObjCBridgeRelatedCast(castType, CastExpr); | |||
8292 | ||||
8293 | DiscardMisalignedMemberAddress(castType.getTypePtr(), CastExpr); | |||
8294 | ||||
8295 | return BuildCStyleCastExpr(LParenLoc, castTInfo, RParenLoc, CastExpr); | |||
8296 | } | |||
8297 | ||||
8298 | ExprResult Sema::BuildVectorLiteral(SourceLocation LParenLoc, | |||
8299 | SourceLocation RParenLoc, Expr *E, | |||
8300 | TypeSourceInfo *TInfo) { | |||
8301 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 8302, __extension__ __PRETTY_FUNCTION__ )) | |||
8302 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 8302, __extension__ __PRETTY_FUNCTION__ )); | |||
8303 | ||||
8304 | Expr **exprs; | |||
8305 | unsigned numExprs; | |||
8306 | Expr *subExpr; | |||
8307 | SourceLocation LiteralLParenLoc, LiteralRParenLoc; | |||
8308 | if (ParenListExpr *PE = dyn_cast<ParenListExpr>(E)) { | |||
8309 | LiteralLParenLoc = PE->getLParenLoc(); | |||
8310 | LiteralRParenLoc = PE->getRParenLoc(); | |||
8311 | exprs = PE->getExprs(); | |||
8312 | numExprs = PE->getNumExprs(); | |||
8313 | } else { // isa<ParenExpr> by assertion at function entrance | |||
8314 | LiteralLParenLoc = cast<ParenExpr>(E)->getLParen(); | |||
8315 | LiteralRParenLoc = cast<ParenExpr>(E)->getRParen(); | |||
8316 | subExpr = cast<ParenExpr>(E)->getSubExpr(); | |||
8317 | exprs = &subExpr; | |||
8318 | numExprs = 1; | |||
8319 | } | |||
8320 | ||||
8321 | QualType Ty = TInfo->getType(); | |||
8322 | assert(Ty->isVectorType() && "Expected vector type")(static_cast <bool> (Ty->isVectorType() && "Expected vector type" ) ? void (0) : __assert_fail ("Ty->isVectorType() && \"Expected vector type\"" , "clang/lib/Sema/SemaExpr.cpp", 8322, __extension__ __PRETTY_FUNCTION__ )); | |||
8323 | ||||
8324 | SmallVector<Expr *, 8> initExprs; | |||
8325 | const VectorType *VTy = Ty->castAs<VectorType>(); | |||
8326 | unsigned numElems = VTy->getNumElements(); | |||
8327 | ||||
8328 | // '(...)' form of vector initialization in AltiVec: the number of | |||
8329 | // initializers must be one or must match the size of the vector. | |||
8330 | // If a single value is specified in the initializer then it will be | |||
8331 | // replicated to all the components of the vector | |||
8332 | if (CheckAltivecInitFromScalar(E->getSourceRange(), Ty, | |||
8333 | VTy->getElementType())) | |||
8334 | return ExprError(); | |||
8335 | if (ShouldSplatAltivecScalarInCast(VTy)) { | |||
8336 | // The number of initializers must be one or must match the size of the | |||
8337 | // vector. If a single value is specified in the initializer then it will | |||
8338 | // be replicated to all the components of the vector | |||
8339 | if (numExprs == 1) { | |||
8340 | QualType ElemTy = VTy->getElementType(); | |||
8341 | ExprResult Literal = DefaultLvalueConversion(exprs[0]); | |||
8342 | if (Literal.isInvalid()) | |||
8343 | return ExprError(); | |||
8344 | Literal = ImpCastExprToType(Literal.get(), ElemTy, | |||
8345 | PrepareScalarCast(Literal, ElemTy)); | |||
8346 | return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.get()); | |||
8347 | } | |||
8348 | else if (numExprs < numElems) { | |||
8349 | Diag(E->getExprLoc(), | |||
8350 | diag::err_incorrect_number_of_vector_initializers); | |||
8351 | return ExprError(); | |||
8352 | } | |||
8353 | else | |||
8354 | initExprs.append(exprs, exprs + numExprs); | |||
8355 | } | |||
8356 | else { | |||
8357 | // For OpenCL, when the number of initializers is a single value, | |||
8358 | // it will be replicated to all components of the vector. | |||
8359 | if (getLangOpts().OpenCL && | |||
8360 | VTy->getVectorKind() == VectorType::GenericVector && | |||
8361 | numExprs == 1) { | |||
8362 | QualType ElemTy = VTy->getElementType(); | |||
8363 | ExprResult Literal = DefaultLvalueConversion(exprs[0]); | |||
8364 | if (Literal.isInvalid()) | |||
8365 | return ExprError(); | |||
8366 | Literal = ImpCastExprToType(Literal.get(), ElemTy, | |||
8367 | PrepareScalarCast(Literal, ElemTy)); | |||
8368 | return BuildCStyleCastExpr(LParenLoc, TInfo, RParenLoc, Literal.get()); | |||
8369 | } | |||
8370 | ||||
8371 | initExprs.append(exprs, exprs + numExprs); | |||
8372 | } | |||
8373 | // FIXME: This means that pretty-printing the final AST will produce curly | |||
8374 | // braces instead of the original commas. | |||
8375 | InitListExpr *initE = new (Context) InitListExpr(Context, LiteralLParenLoc, | |||
8376 | initExprs, LiteralRParenLoc); | |||
8377 | initE->setType(Ty); | |||
8378 | return BuildCompoundLiteralExpr(LParenLoc, TInfo, RParenLoc, initE); | |||
8379 | } | |||
8380 | ||||
8381 | /// This is not an AltiVec-style cast or or C++ direct-initialization, so turn | |||
8382 | /// the ParenListExpr into a sequence of comma binary operators. | |||
8383 | ExprResult | |||
8384 | Sema::MaybeConvertParenListExprToParenExpr(Scope *S, Expr *OrigExpr) { | |||
8385 | ParenListExpr *E = dyn_cast<ParenListExpr>(OrigExpr); | |||
8386 | if (!E) | |||
8387 | return OrigExpr; | |||
8388 | ||||
8389 | ExprResult Result(E->getExpr(0)); | |||
8390 | ||||
8391 | for (unsigned i = 1, e = E->getNumExprs(); i != e && !Result.isInvalid(); ++i) | |||
8392 | Result = ActOnBinOp(S, E->getExprLoc(), tok::comma, Result.get(), | |||
8393 | E->getExpr(i)); | |||
8394 | ||||
8395 | if (Result.isInvalid()) return ExprError(); | |||
8396 | ||||
8397 | return ActOnParenExpr(E->getLParenLoc(), E->getRParenLoc(), Result.get()); | |||
8398 | } | |||
8399 | ||||
8400 | ExprResult Sema::ActOnParenListExpr(SourceLocation L, | |||
8401 | SourceLocation R, | |||
8402 | MultiExprArg Val) { | |||
8403 | return ParenListExpr::Create(Context, L, Val, R); | |||
8404 | } | |||
8405 | ||||
8406 | /// Emit a specialized diagnostic when one expression is a null pointer | |||
8407 | /// constant and the other is not a pointer. Returns true if a diagnostic is | |||
8408 | /// emitted. | |||
8409 | bool Sema::DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, | |||
8410 | SourceLocation QuestionLoc) { | |||
8411 | Expr *NullExpr = LHSExpr; | |||
8412 | Expr *NonPointerExpr = RHSExpr; | |||
8413 | Expr::NullPointerConstantKind NullKind = | |||
8414 | NullExpr->isNullPointerConstant(Context, | |||
8415 | Expr::NPC_ValueDependentIsNotNull); | |||
8416 | ||||
8417 | if (NullKind == Expr::NPCK_NotNull) { | |||
8418 | NullExpr = RHSExpr; | |||
8419 | NonPointerExpr = LHSExpr; | |||
8420 | NullKind = | |||
8421 | NullExpr->isNullPointerConstant(Context, | |||
8422 | Expr::NPC_ValueDependentIsNotNull); | |||
8423 | } | |||
8424 | ||||
8425 | if (NullKind == Expr::NPCK_NotNull) | |||
8426 | return false; | |||
8427 | ||||
8428 | if (NullKind == Expr::NPCK_ZeroExpression) | |||
8429 | return false; | |||
8430 | ||||
8431 | if (NullKind == Expr::NPCK_ZeroLiteral) { | |||
8432 | // In this case, check to make sure that we got here from a "NULL" | |||
8433 | // string in the source code. | |||
8434 | NullExpr = NullExpr->IgnoreParenImpCasts(); | |||
8435 | SourceLocation loc = NullExpr->getExprLoc(); | |||
8436 | if (!findMacroSpelling(loc, "NULL")) | |||
8437 | return false; | |||
8438 | } | |||
8439 | ||||
8440 | int DiagType = (NullKind == Expr::NPCK_CXX11_nullptr); | |||
8441 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands_null) | |||
8442 | << NonPointerExpr->getType() << DiagType | |||
8443 | << NonPointerExpr->getSourceRange(); | |||
8444 | return true; | |||
8445 | } | |||
8446 | ||||
8447 | /// Return false if the condition expression is valid, true otherwise. | |||
8448 | static bool checkCondition(Sema &S, Expr *Cond, SourceLocation QuestionLoc) { | |||
8449 | QualType CondTy = Cond->getType(); | |||
8450 | ||||
8451 | // OpenCL v1.1 s6.3.i says the condition cannot be a floating point type. | |||
8452 | if (S.getLangOpts().OpenCL && CondTy->isFloatingType()) { | |||
8453 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_nonfloat) | |||
8454 | << CondTy << Cond->getSourceRange(); | |||
8455 | return true; | |||
8456 | } | |||
8457 | ||||
8458 | // C99 6.5.15p2 | |||
8459 | if (CondTy->isScalarType()) return false; | |||
8460 | ||||
8461 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_scalar) | |||
8462 | << CondTy << Cond->getSourceRange(); | |||
8463 | return true; | |||
8464 | } | |||
8465 | ||||
8466 | /// Return false if the NullExpr can be promoted to PointerTy, | |||
8467 | /// true otherwise. | |||
8468 | static bool checkConditionalNullPointer(Sema &S, ExprResult &NullExpr, | |||
8469 | QualType PointerTy) { | |||
8470 | if ((!PointerTy->isAnyPointerType() && !PointerTy->isBlockPointerType()) || | |||
8471 | !NullExpr.get()->isNullPointerConstant(S.Context, | |||
8472 | Expr::NPC_ValueDependentIsNull)) | |||
8473 | return true; | |||
8474 | ||||
8475 | NullExpr = S.ImpCastExprToType(NullExpr.get(), PointerTy, CK_NullToPointer); | |||
8476 | return false; | |||
8477 | } | |||
8478 | ||||
8479 | /// Checks compatibility between two pointers and return the resulting | |||
8480 | /// type. | |||
8481 | static QualType checkConditionalPointerCompatibility(Sema &S, ExprResult &LHS, | |||
8482 | ExprResult &RHS, | |||
8483 | SourceLocation Loc) { | |||
8484 | QualType LHSTy = LHS.get()->getType(); | |||
8485 | QualType RHSTy = RHS.get()->getType(); | |||
8486 | ||||
8487 | if (S.Context.hasSameType(LHSTy, RHSTy)) { | |||
8488 | // Two identical pointers types are always compatible. | |||
8489 | return S.Context.getCommonSugaredType(LHSTy, RHSTy); | |||
8490 | } | |||
8491 | ||||
8492 | QualType lhptee, rhptee; | |||
8493 | ||||
8494 | // Get the pointee types. | |||
8495 | bool IsBlockPointer = false; | |||
8496 | if (const BlockPointerType *LHSBTy = LHSTy->getAs<BlockPointerType>()) { | |||
8497 | lhptee = LHSBTy->getPointeeType(); | |||
8498 | rhptee = RHSTy->castAs<BlockPointerType>()->getPointeeType(); | |||
8499 | IsBlockPointer = true; | |||
8500 | } else { | |||
8501 | lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
8502 | rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
8503 | } | |||
8504 | ||||
8505 | // C99 6.5.15p6: If both operands are pointers to compatible types or to | |||
8506 | // differently qualified versions of compatible types, the result type is | |||
8507 | // a pointer to an appropriately qualified version of the composite | |||
8508 | // type. | |||
8509 | ||||
8510 | // Only CVR-qualifiers exist in the standard, and the differently-qualified | |||
8511 | // clause doesn't make sense for our extensions. E.g. address space 2 should | |||
8512 | // be incompatible with address space 3: they may live on different devices or | |||
8513 | // anything. | |||
8514 | Qualifiers lhQual = lhptee.getQualifiers(); | |||
8515 | Qualifiers rhQual = rhptee.getQualifiers(); | |||
8516 | ||||
8517 | LangAS ResultAddrSpace = LangAS::Default; | |||
8518 | LangAS LAddrSpace = lhQual.getAddressSpace(); | |||
8519 | LangAS RAddrSpace = rhQual.getAddressSpace(); | |||
8520 | ||||
8521 | // OpenCL v1.1 s6.5 - Conversion between pointers to distinct address | |||
8522 | // spaces is disallowed. | |||
8523 | if (lhQual.isAddressSpaceSupersetOf(rhQual)) | |||
8524 | ResultAddrSpace = LAddrSpace; | |||
8525 | else if (rhQual.isAddressSpaceSupersetOf(lhQual)) | |||
8526 | ResultAddrSpace = RAddrSpace; | |||
8527 | else { | |||
8528 | S.Diag(Loc, diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
8529 | << LHSTy << RHSTy << 2 << LHS.get()->getSourceRange() | |||
8530 | << RHS.get()->getSourceRange(); | |||
8531 | return QualType(); | |||
8532 | } | |||
8533 | ||||
8534 | unsigned MergedCVRQual = lhQual.getCVRQualifiers() | rhQual.getCVRQualifiers(); | |||
8535 | auto LHSCastKind = CK_BitCast, RHSCastKind = CK_BitCast; | |||
8536 | lhQual.removeCVRQualifiers(); | |||
8537 | rhQual.removeCVRQualifiers(); | |||
8538 | ||||
8539 | // OpenCL v2.0 specification doesn't extend compatibility of type qualifiers | |||
8540 | // (C99 6.7.3) for address spaces. We assume that the check should behave in | |||
8541 | // the same manner as it's defined for CVR qualifiers, so for OpenCL two | |||
8542 | // qual types are compatible iff | |||
8543 | // * corresponded types are compatible | |||
8544 | // * CVR qualifiers are equal | |||
8545 | // * address spaces are equal | |||
8546 | // Thus for conditional operator we merge CVR and address space unqualified | |||
8547 | // pointees and if there is a composite type we return a pointer to it with | |||
8548 | // merged qualifiers. | |||
8549 | LHSCastKind = | |||
8550 | LAddrSpace == ResultAddrSpace ? CK_BitCast : CK_AddressSpaceConversion; | |||
8551 | RHSCastKind = | |||
8552 | RAddrSpace == ResultAddrSpace ? CK_BitCast : CK_AddressSpaceConversion; | |||
8553 | lhQual.removeAddressSpace(); | |||
8554 | rhQual.removeAddressSpace(); | |||
8555 | ||||
8556 | lhptee = S.Context.getQualifiedType(lhptee.getUnqualifiedType(), lhQual); | |||
8557 | rhptee = S.Context.getQualifiedType(rhptee.getUnqualifiedType(), rhQual); | |||
8558 | ||||
8559 | QualType CompositeTy = S.Context.mergeTypes( | |||
8560 | lhptee, rhptee, /*OfBlockPointer=*/false, /*Unqualified=*/false, | |||
8561 | /*BlockReturnType=*/false, /*IsConditionalOperator=*/true); | |||
8562 | ||||
8563 | if (CompositeTy.isNull()) { | |||
8564 | // In this situation, we assume void* type. No especially good | |||
8565 | // reason, but this is what gcc does, and we do have to pick | |||
8566 | // to get a consistent AST. | |||
8567 | QualType incompatTy; | |||
8568 | incompatTy = S.Context.getPointerType( | |||
8569 | S.Context.getAddrSpaceQualType(S.Context.VoidTy, ResultAddrSpace)); | |||
8570 | LHS = S.ImpCastExprToType(LHS.get(), incompatTy, LHSCastKind); | |||
8571 | RHS = S.ImpCastExprToType(RHS.get(), incompatTy, RHSCastKind); | |||
8572 | ||||
8573 | // FIXME: For OpenCL the warning emission and cast to void* leaves a room | |||
8574 | // for casts between types with incompatible address space qualifiers. | |||
8575 | // For the following code the compiler produces casts between global and | |||
8576 | // local address spaces of the corresponded innermost pointees: | |||
8577 | // local int *global *a; | |||
8578 | // global int *global *b; | |||
8579 | // a = (0 ? a : b); // see C99 6.5.16.1.p1. | |||
8580 | S.Diag(Loc, diag::ext_typecheck_cond_incompatible_pointers) | |||
8581 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8582 | << RHS.get()->getSourceRange(); | |||
8583 | ||||
8584 | return incompatTy; | |||
8585 | } | |||
8586 | ||||
8587 | // The pointer types are compatible. | |||
8588 | // In case of OpenCL ResultTy should have the address space qualifier | |||
8589 | // which is a superset of address spaces of both the 2nd and the 3rd | |||
8590 | // operands of the conditional operator. | |||
8591 | QualType ResultTy = [&, ResultAddrSpace]() { | |||
8592 | if (S.getLangOpts().OpenCL) { | |||
8593 | Qualifiers CompositeQuals = CompositeTy.getQualifiers(); | |||
8594 | CompositeQuals.setAddressSpace(ResultAddrSpace); | |||
8595 | return S.Context | |||
8596 | .getQualifiedType(CompositeTy.getUnqualifiedType(), CompositeQuals) | |||
8597 | .withCVRQualifiers(MergedCVRQual); | |||
8598 | } | |||
8599 | return CompositeTy.withCVRQualifiers(MergedCVRQual); | |||
8600 | }(); | |||
8601 | if (IsBlockPointer) | |||
8602 | ResultTy = S.Context.getBlockPointerType(ResultTy); | |||
8603 | else | |||
8604 | ResultTy = S.Context.getPointerType(ResultTy); | |||
8605 | ||||
8606 | LHS = S.ImpCastExprToType(LHS.get(), ResultTy, LHSCastKind); | |||
8607 | RHS = S.ImpCastExprToType(RHS.get(), ResultTy, RHSCastKind); | |||
8608 | return ResultTy; | |||
8609 | } | |||
8610 | ||||
8611 | /// Return the resulting type when the operands are both block pointers. | |||
8612 | static QualType checkConditionalBlockPointerCompatibility(Sema &S, | |||
8613 | ExprResult &LHS, | |||
8614 | ExprResult &RHS, | |||
8615 | SourceLocation Loc) { | |||
8616 | QualType LHSTy = LHS.get()->getType(); | |||
8617 | QualType RHSTy = RHS.get()->getType(); | |||
8618 | ||||
8619 | if (!LHSTy->isBlockPointerType() || !RHSTy->isBlockPointerType()) { | |||
8620 | if (LHSTy->isVoidPointerType() || RHSTy->isVoidPointerType()) { | |||
8621 | QualType destType = S.Context.getPointerType(S.Context.VoidTy); | |||
8622 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
8623 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
8624 | return destType; | |||
8625 | } | |||
8626 | S.Diag(Loc, diag::err_typecheck_cond_incompatible_operands) | |||
8627 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8628 | << RHS.get()->getSourceRange(); | |||
8629 | return QualType(); | |||
8630 | } | |||
8631 | ||||
8632 | // We have 2 block pointer types. | |||
8633 | return checkConditionalPointerCompatibility(S, LHS, RHS, Loc); | |||
8634 | } | |||
8635 | ||||
8636 | /// Return the resulting type when the operands are both pointers. | |||
8637 | static QualType | |||
8638 | checkConditionalObjectPointersCompatibility(Sema &S, ExprResult &LHS, | |||
8639 | ExprResult &RHS, | |||
8640 | SourceLocation Loc) { | |||
8641 | // get the pointer types | |||
8642 | QualType LHSTy = LHS.get()->getType(); | |||
8643 | QualType RHSTy = RHS.get()->getType(); | |||
8644 | ||||
8645 | // get the "pointed to" types | |||
8646 | QualType lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
8647 | QualType rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
8648 | ||||
8649 | // ignore qualifiers on void (C99 6.5.15p3, clause 6) | |||
8650 | if (lhptee->isVoidType() && rhptee->isIncompleteOrObjectType()) { | |||
8651 | // Figure out necessary qualifiers (C99 6.5.15p6) | |||
8652 | QualType destPointee | |||
8653 | = S.Context.getQualifiedType(lhptee, rhptee.getQualifiers()); | |||
8654 | QualType destType = S.Context.getPointerType(destPointee); | |||
8655 | // Add qualifiers if necessary. | |||
8656 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_NoOp); | |||
8657 | // Promote to void*. | |||
8658 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
8659 | return destType; | |||
8660 | } | |||
8661 | if (rhptee->isVoidType() && lhptee->isIncompleteOrObjectType()) { | |||
8662 | QualType destPointee | |||
8663 | = S.Context.getQualifiedType(rhptee, lhptee.getQualifiers()); | |||
8664 | QualType destType = S.Context.getPointerType(destPointee); | |||
8665 | // Add qualifiers if necessary. | |||
8666 | RHS = S.ImpCastExprToType(RHS.get(), destType, CK_NoOp); | |||
8667 | // Promote to void*. | |||
8668 | LHS = S.ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
8669 | return destType; | |||
8670 | } | |||
8671 | ||||
8672 | return checkConditionalPointerCompatibility(S, LHS, RHS, Loc); | |||
8673 | } | |||
8674 | ||||
8675 | /// Return false if the first expression is not an integer and the second | |||
8676 | /// expression is not a pointer, true otherwise. | |||
8677 | static bool checkPointerIntegerMismatch(Sema &S, ExprResult &Int, | |||
8678 | Expr* PointerExpr, SourceLocation Loc, | |||
8679 | bool IsIntFirstExpr) { | |||
8680 | if (!PointerExpr->getType()->isPointerType() || | |||
8681 | !Int.get()->getType()->isIntegerType()) | |||
8682 | return false; | |||
8683 | ||||
8684 | Expr *Expr1 = IsIntFirstExpr ? Int.get() : PointerExpr; | |||
8685 | Expr *Expr2 = IsIntFirstExpr ? PointerExpr : Int.get(); | |||
8686 | ||||
8687 | S.Diag(Loc, diag::ext_typecheck_cond_pointer_integer_mismatch) | |||
8688 | << Expr1->getType() << Expr2->getType() | |||
8689 | << Expr1->getSourceRange() << Expr2->getSourceRange(); | |||
8690 | Int = S.ImpCastExprToType(Int.get(), PointerExpr->getType(), | |||
8691 | CK_IntegralToPointer); | |||
8692 | return true; | |||
8693 | } | |||
8694 | ||||
8695 | /// Simple conversion between integer and floating point types. | |||
8696 | /// | |||
8697 | /// Used when handling the OpenCL conditional operator where the | |||
8698 | /// condition is a vector while the other operands are scalar. | |||
8699 | /// | |||
8700 | /// OpenCL v1.1 s6.3.i and s6.11.6 together require that the scalar | |||
8701 | /// types are either integer or floating type. Between the two | |||
8702 | /// operands, the type with the higher rank is defined as the "result | |||
8703 | /// type". The other operand needs to be promoted to the same type. No | |||
8704 | /// other type promotion is allowed. We cannot use | |||
8705 | /// UsualArithmeticConversions() for this purpose, since it always | |||
8706 | /// promotes promotable types. | |||
8707 | static QualType OpenCLArithmeticConversions(Sema &S, ExprResult &LHS, | |||
8708 | ExprResult &RHS, | |||
8709 | SourceLocation QuestionLoc) { | |||
8710 | LHS = S.DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
8711 | if (LHS.isInvalid()) | |||
8712 | return QualType(); | |||
8713 | RHS = S.DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
8714 | if (RHS.isInvalid()) | |||
8715 | return QualType(); | |||
8716 | ||||
8717 | // For conversion purposes, we ignore any qualifiers. | |||
8718 | // For example, "const float" and "float" are equivalent. | |||
8719 | QualType LHSType = | |||
8720 | S.Context.getCanonicalType(LHS.get()->getType()).getUnqualifiedType(); | |||
8721 | QualType RHSType = | |||
8722 | S.Context.getCanonicalType(RHS.get()->getType()).getUnqualifiedType(); | |||
8723 | ||||
8724 | if (!LHSType->isIntegerType() && !LHSType->isRealFloatingType()) { | |||
8725 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_int_float) | |||
8726 | << LHSType << LHS.get()->getSourceRange(); | |||
8727 | return QualType(); | |||
8728 | } | |||
8729 | ||||
8730 | if (!RHSType->isIntegerType() && !RHSType->isRealFloatingType()) { | |||
8731 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_int_float) | |||
8732 | << RHSType << RHS.get()->getSourceRange(); | |||
8733 | return QualType(); | |||
8734 | } | |||
8735 | ||||
8736 | // If both types are identical, no conversion is needed. | |||
8737 | if (LHSType == RHSType) | |||
8738 | return LHSType; | |||
8739 | ||||
8740 | // Now handle "real" floating types (i.e. float, double, long double). | |||
8741 | if (LHSType->isRealFloatingType() || RHSType->isRealFloatingType()) | |||
8742 | return handleFloatConversion(S, LHS, RHS, LHSType, RHSType, | |||
8743 | /*IsCompAssign = */ false); | |||
8744 | ||||
8745 | // Finally, we have two differing integer types. | |||
8746 | return handleIntegerConversion<doIntegralCast, doIntegralCast> | |||
8747 | (S, LHS, RHS, LHSType, RHSType, /*IsCompAssign = */ false); | |||
8748 | } | |||
8749 | ||||
8750 | /// Convert scalar operands to a vector that matches the | |||
8751 | /// condition in length. | |||
8752 | /// | |||
8753 | /// Used when handling the OpenCL conditional operator where the | |||
8754 | /// condition is a vector while the other operands are scalar. | |||
8755 | /// | |||
8756 | /// We first compute the "result type" for the scalar operands | |||
8757 | /// according to OpenCL v1.1 s6.3.i. Both operands are then converted | |||
8758 | /// into a vector of that type where the length matches the condition | |||
8759 | /// vector type. s6.11.6 requires that the element types of the result | |||
8760 | /// and the condition must have the same number of bits. | |||
8761 | static QualType | |||
8762 | OpenCLConvertScalarsToVectors(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
8763 | QualType CondTy, SourceLocation QuestionLoc) { | |||
8764 | QualType ResTy = OpenCLArithmeticConversions(S, LHS, RHS, QuestionLoc); | |||
8765 | if (ResTy.isNull()) return QualType(); | |||
8766 | ||||
8767 | const VectorType *CV = CondTy->getAs<VectorType>(); | |||
8768 | assert(CV)(static_cast <bool> (CV) ? void (0) : __assert_fail ("CV" , "clang/lib/Sema/SemaExpr.cpp", 8768, __extension__ __PRETTY_FUNCTION__ )); | |||
8769 | ||||
8770 | // Determine the vector result type | |||
8771 | unsigned NumElements = CV->getNumElements(); | |||
8772 | QualType VectorTy = S.Context.getExtVectorType(ResTy, NumElements); | |||
8773 | ||||
8774 | // Ensure that all types have the same number of bits | |||
8775 | if (S.Context.getTypeSize(CV->getElementType()) | |||
8776 | != S.Context.getTypeSize(ResTy)) { | |||
8777 | // Since VectorTy is created internally, it does not pretty print | |||
8778 | // with an OpenCL name. Instead, we just print a description. | |||
8779 | std::string EleTyName = ResTy.getUnqualifiedType().getAsString(); | |||
8780 | SmallString<64> Str; | |||
8781 | llvm::raw_svector_ostream OS(Str); | |||
8782 | OS << "(vector of " << NumElements << " '" << EleTyName << "' values)"; | |||
8783 | S.Diag(QuestionLoc, diag::err_conditional_vector_element_size) | |||
8784 | << CondTy << OS.str(); | |||
8785 | return QualType(); | |||
8786 | } | |||
8787 | ||||
8788 | // Convert operands to the vector result type | |||
8789 | LHS = S.ImpCastExprToType(LHS.get(), VectorTy, CK_VectorSplat); | |||
8790 | RHS = S.ImpCastExprToType(RHS.get(), VectorTy, CK_VectorSplat); | |||
8791 | ||||
8792 | return VectorTy; | |||
8793 | } | |||
8794 | ||||
8795 | /// Return false if this is a valid OpenCL condition vector | |||
8796 | static bool checkOpenCLConditionVector(Sema &S, Expr *Cond, | |||
8797 | SourceLocation QuestionLoc) { | |||
8798 | // OpenCL v1.1 s6.11.6 says the elements of the vector must be of | |||
8799 | // integral type. | |||
8800 | const VectorType *CondTy = Cond->getType()->getAs<VectorType>(); | |||
8801 | assert(CondTy)(static_cast <bool> (CondTy) ? void (0) : __assert_fail ("CondTy", "clang/lib/Sema/SemaExpr.cpp", 8801, __extension__ __PRETTY_FUNCTION__)); | |||
8802 | QualType EleTy = CondTy->getElementType(); | |||
8803 | if (EleTy->isIntegerType()) return false; | |||
8804 | ||||
8805 | S.Diag(QuestionLoc, diag::err_typecheck_cond_expect_nonfloat) | |||
8806 | << Cond->getType() << Cond->getSourceRange(); | |||
8807 | return true; | |||
8808 | } | |||
8809 | ||||
8810 | /// Return false if the vector condition type and the vector | |||
8811 | /// result type are compatible. | |||
8812 | /// | |||
8813 | /// OpenCL v1.1 s6.11.6 requires that both vector types have the same | |||
8814 | /// number of elements, and their element types have the same number | |||
8815 | /// of bits. | |||
8816 | static bool checkVectorResult(Sema &S, QualType CondTy, QualType VecResTy, | |||
8817 | SourceLocation QuestionLoc) { | |||
8818 | const VectorType *CV = CondTy->getAs<VectorType>(); | |||
8819 | const VectorType *RV = VecResTy->getAs<VectorType>(); | |||
8820 | assert(CV && RV)(static_cast <bool> (CV && RV) ? void (0) : __assert_fail ("CV && RV", "clang/lib/Sema/SemaExpr.cpp", 8820, __extension__ __PRETTY_FUNCTION__)); | |||
8821 | ||||
8822 | if (CV->getNumElements() != RV->getNumElements()) { | |||
8823 | S.Diag(QuestionLoc, diag::err_conditional_vector_size) | |||
8824 | << CondTy << VecResTy; | |||
8825 | return true; | |||
8826 | } | |||
8827 | ||||
8828 | QualType CVE = CV->getElementType(); | |||
8829 | QualType RVE = RV->getElementType(); | |||
8830 | ||||
8831 | if (S.Context.getTypeSize(CVE) != S.Context.getTypeSize(RVE)) { | |||
8832 | S.Diag(QuestionLoc, diag::err_conditional_vector_element_size) | |||
8833 | << CondTy << VecResTy; | |||
8834 | return true; | |||
8835 | } | |||
8836 | ||||
8837 | return false; | |||
8838 | } | |||
8839 | ||||
8840 | /// Return the resulting type for the conditional operator in | |||
8841 | /// OpenCL (aka "ternary selection operator", OpenCL v1.1 | |||
8842 | /// s6.3.i) when the condition is a vector type. | |||
8843 | static QualType | |||
8844 | OpenCLCheckVectorConditional(Sema &S, ExprResult &Cond, | |||
8845 | ExprResult &LHS, ExprResult &RHS, | |||
8846 | SourceLocation QuestionLoc) { | |||
8847 | Cond = S.DefaultFunctionArrayLvalueConversion(Cond.get()); | |||
8848 | if (Cond.isInvalid()) | |||
8849 | return QualType(); | |||
8850 | QualType CondTy = Cond.get()->getType(); | |||
8851 | ||||
8852 | if (checkOpenCLConditionVector(S, Cond.get(), QuestionLoc)) | |||
8853 | return QualType(); | |||
8854 | ||||
8855 | // If either operand is a vector then find the vector type of the | |||
8856 | // result as specified in OpenCL v1.1 s6.3.i. | |||
8857 | if (LHS.get()->getType()->isVectorType() || | |||
8858 | RHS.get()->getType()->isVectorType()) { | |||
8859 | bool IsBoolVecLang = | |||
8860 | !S.getLangOpts().OpenCL && !S.getLangOpts().OpenCLCPlusPlus; | |||
8861 | QualType VecResTy = | |||
8862 | S.CheckVectorOperands(LHS, RHS, QuestionLoc, | |||
8863 | /*isCompAssign*/ false, | |||
8864 | /*AllowBothBool*/ true, | |||
8865 | /*AllowBoolConversions*/ false, | |||
8866 | /*AllowBooleanOperation*/ IsBoolVecLang, | |||
8867 | /*ReportInvalid*/ true); | |||
8868 | if (VecResTy.isNull()) | |||
8869 | return QualType(); | |||
8870 | // The result type must match the condition type as specified in | |||
8871 | // OpenCL v1.1 s6.11.6. | |||
8872 | if (checkVectorResult(S, CondTy, VecResTy, QuestionLoc)) | |||
8873 | return QualType(); | |||
8874 | return VecResTy; | |||
8875 | } | |||
8876 | ||||
8877 | // Both operands are scalar. | |||
8878 | return OpenCLConvertScalarsToVectors(S, LHS, RHS, CondTy, QuestionLoc); | |||
8879 | } | |||
8880 | ||||
8881 | /// Return true if the Expr is block type | |||
8882 | static bool checkBlockType(Sema &S, const Expr *E) { | |||
8883 | if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { | |||
8884 | QualType Ty = CE->getCallee()->getType(); | |||
8885 | if (Ty->isBlockPointerType()) { | |||
8886 | S.Diag(E->getExprLoc(), diag::err_opencl_ternary_with_block); | |||
8887 | return true; | |||
8888 | } | |||
8889 | } | |||
8890 | return false; | |||
8891 | } | |||
8892 | ||||
8893 | /// Note that LHS is not null here, even if this is the gnu "x ?: y" extension. | |||
8894 | /// In that case, LHS = cond. | |||
8895 | /// C99 6.5.15 | |||
8896 | QualType Sema::CheckConditionalOperands(ExprResult &Cond, ExprResult &LHS, | |||
8897 | ExprResult &RHS, ExprValueKind &VK, | |||
8898 | ExprObjectKind &OK, | |||
8899 | SourceLocation QuestionLoc) { | |||
8900 | ||||
8901 | ExprResult LHSResult = CheckPlaceholderExpr(LHS.get()); | |||
8902 | if (!LHSResult.isUsable()) return QualType(); | |||
8903 | LHS = LHSResult; | |||
8904 | ||||
8905 | ExprResult RHSResult = CheckPlaceholderExpr(RHS.get()); | |||
8906 | if (!RHSResult.isUsable()) return QualType(); | |||
8907 | RHS = RHSResult; | |||
8908 | ||||
8909 | // C++ is sufficiently different to merit its own checker. | |||
8910 | if (getLangOpts().CPlusPlus) | |||
8911 | return CXXCheckConditionalOperands(Cond, LHS, RHS, VK, OK, QuestionLoc); | |||
8912 | ||||
8913 | VK = VK_PRValue; | |||
8914 | OK = OK_Ordinary; | |||
8915 | ||||
8916 | if (Context.isDependenceAllowed() && | |||
8917 | (Cond.get()->isTypeDependent() || LHS.get()->isTypeDependent() || | |||
8918 | RHS.get()->isTypeDependent())) { | |||
8919 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "clang/lib/Sema/SemaExpr.cpp" , 8919, __extension__ __PRETTY_FUNCTION__)); | |||
8920 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 8922, __extension__ __PRETTY_FUNCTION__ )) | |||
8921 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 8922, __extension__ __PRETTY_FUNCTION__ )) | |||
8922 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 8922, __extension__ __PRETTY_FUNCTION__ )); | |||
8923 | return Context.DependentTy; | |||
8924 | } | |||
8925 | ||||
8926 | // The OpenCL operator with a vector condition is sufficiently | |||
8927 | // different to merit its own checker. | |||
8928 | if ((getLangOpts().OpenCL && Cond.get()->getType()->isVectorType()) || | |||
8929 | Cond.get()->getType()->isExtVectorType()) | |||
8930 | return OpenCLCheckVectorConditional(*this, Cond, LHS, RHS, QuestionLoc); | |||
8931 | ||||
8932 | // First, check the condition. | |||
8933 | Cond = UsualUnaryConversions(Cond.get()); | |||
8934 | if (Cond.isInvalid()) | |||
8935 | return QualType(); | |||
8936 | if (checkCondition(*this, Cond.get(), QuestionLoc)) | |||
8937 | return QualType(); | |||
8938 | ||||
8939 | // Now check the two expressions. | |||
8940 | if (LHS.get()->getType()->isVectorType() || | |||
8941 | RHS.get()->getType()->isVectorType()) | |||
8942 | return CheckVectorOperands(LHS, RHS, QuestionLoc, /*isCompAssign*/ false, | |||
8943 | /*AllowBothBool*/ true, | |||
8944 | /*AllowBoolConversions*/ false, | |||
8945 | /*AllowBooleanOperation*/ false, | |||
8946 | /*ReportInvalid*/ true); | |||
8947 | ||||
8948 | QualType ResTy = | |||
8949 | UsualArithmeticConversions(LHS, RHS, QuestionLoc, ACK_Conditional); | |||
8950 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
8951 | return QualType(); | |||
8952 | ||||
8953 | QualType LHSTy = LHS.get()->getType(); | |||
8954 | QualType RHSTy = RHS.get()->getType(); | |||
8955 | ||||
8956 | // Diagnose attempts to convert between __ibm128, __float128 and long double | |||
8957 | // where such conversions currently can't be handled. | |||
8958 | if (unsupportedTypeConversion(*this, LHSTy, RHSTy)) { | |||
8959 | Diag(QuestionLoc, | |||
8960 | diag::err_typecheck_cond_incompatible_operands) << LHSTy << RHSTy | |||
8961 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
8962 | return QualType(); | |||
8963 | } | |||
8964 | ||||
8965 | // OpenCL v2.0 s6.12.5 - Blocks cannot be used as expressions of the ternary | |||
8966 | // selection operator (?:). | |||
8967 | if (getLangOpts().OpenCL && | |||
8968 | ((int)checkBlockType(*this, LHS.get()) | (int)checkBlockType(*this, RHS.get()))) { | |||
8969 | return QualType(); | |||
8970 | } | |||
8971 | ||||
8972 | // If both operands have arithmetic type, do the usual arithmetic conversions | |||
8973 | // to find a common type: C99 6.5.15p3,5. | |||
8974 | if (LHSTy->isArithmeticType() && RHSTy->isArithmeticType()) { | |||
8975 | // Disallow invalid arithmetic conversions, such as those between bit- | |||
8976 | // precise integers types of different sizes, or between a bit-precise | |||
8977 | // integer and another type. | |||
8978 | if (ResTy.isNull() && (LHSTy->isBitIntType() || RHSTy->isBitIntType())) { | |||
8979 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) | |||
8980 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
8981 | << RHS.get()->getSourceRange(); | |||
8982 | return QualType(); | |||
8983 | } | |||
8984 | ||||
8985 | LHS = ImpCastExprToType(LHS.get(), ResTy, PrepareScalarCast(LHS, ResTy)); | |||
8986 | RHS = ImpCastExprToType(RHS.get(), ResTy, PrepareScalarCast(RHS, ResTy)); | |||
8987 | ||||
8988 | return ResTy; | |||
8989 | } | |||
8990 | ||||
8991 | // And if they're both bfloat (which isn't arithmetic), that's fine too. | |||
8992 | if (LHSTy->isBFloat16Type() && RHSTy->isBFloat16Type()) { | |||
8993 | return Context.getCommonSugaredType(LHSTy, RHSTy); | |||
8994 | } | |||
8995 | ||||
8996 | // If both operands are the same structure or union type, the result is that | |||
8997 | // type. | |||
8998 | if (const RecordType *LHSRT = LHSTy->getAs<RecordType>()) { // C99 6.5.15p3 | |||
8999 | if (const RecordType *RHSRT = RHSTy->getAs<RecordType>()) | |||
9000 | if (LHSRT->getDecl() == RHSRT->getDecl()) | |||
9001 | // "If both the operands have structure or union type, the result has | |||
9002 | // that type." This implies that CV qualifiers are dropped. | |||
9003 | return Context.getCommonSugaredType(LHSTy.getUnqualifiedType(), | |||
9004 | RHSTy.getUnqualifiedType()); | |||
9005 | // FIXME: Type of conditional expression must be complete in C mode. | |||
9006 | } | |||
9007 | ||||
9008 | // C99 6.5.15p5: "If both operands have void type, the result has void type." | |||
9009 | // The following || allows only one side to be void (a GCC-ism). | |||
9010 | if (LHSTy->isVoidType() || RHSTy->isVoidType()) { | |||
9011 | QualType ResTy; | |||
9012 | if (LHSTy->isVoidType() && RHSTy->isVoidType()) { | |||
9013 | ResTy = Context.getCommonSugaredType(LHSTy, RHSTy); | |||
9014 | } else if (RHSTy->isVoidType()) { | |||
9015 | ResTy = RHSTy; | |||
9016 | Diag(RHS.get()->getBeginLoc(), diag::ext_typecheck_cond_one_void) | |||
9017 | << RHS.get()->getSourceRange(); | |||
9018 | } else { | |||
9019 | ResTy = LHSTy; | |||
9020 | Diag(LHS.get()->getBeginLoc(), diag::ext_typecheck_cond_one_void) | |||
9021 | << LHS.get()->getSourceRange(); | |||
9022 | } | |||
9023 | LHS = ImpCastExprToType(LHS.get(), ResTy, CK_ToVoid); | |||
9024 | RHS = ImpCastExprToType(RHS.get(), ResTy, CK_ToVoid); | |||
9025 | return ResTy; | |||
9026 | } | |||
9027 | ||||
9028 | // C2x 6.5.15p7: | |||
9029 | // ... if both the second and third operands have nullptr_t type, the | |||
9030 | // result also has that type. | |||
9031 | if (LHSTy->isNullPtrType() && Context.hasSameType(LHSTy, RHSTy)) | |||
9032 | return ResTy; | |||
9033 | ||||
9034 | // C99 6.5.15p6 - "if one operand is a null pointer constant, the result has | |||
9035 | // the type of the other operand." | |||
9036 | if (!checkConditionalNullPointer(*this, RHS, LHSTy)) return LHSTy; | |||
9037 | if (!checkConditionalNullPointer(*this, LHS, RHSTy)) return RHSTy; | |||
9038 | ||||
9039 | // All objective-c pointer type analysis is done here. | |||
9040 | QualType compositeType = FindCompositeObjCPointerType(LHS, RHS, | |||
9041 | QuestionLoc); | |||
9042 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
9043 | return QualType(); | |||
9044 | if (!compositeType.isNull()) | |||
9045 | return compositeType; | |||
9046 | ||||
9047 | ||||
9048 | // Handle block pointer types. | |||
9049 | if (LHSTy->isBlockPointerType() || RHSTy->isBlockPointerType()) | |||
9050 | return checkConditionalBlockPointerCompatibility(*this, LHS, RHS, | |||
9051 | QuestionLoc); | |||
9052 | ||||
9053 | // Check constraints for C object pointers types (C99 6.5.15p3,6). | |||
9054 | if (LHSTy->isPointerType() && RHSTy->isPointerType()) | |||
9055 | return checkConditionalObjectPointersCompatibility(*this, LHS, RHS, | |||
9056 | QuestionLoc); | |||
9057 | ||||
9058 | // GCC compatibility: soften pointer/integer mismatch. Note that | |||
9059 | // null pointers have been filtered out by this point. | |||
9060 | if (checkPointerIntegerMismatch(*this, LHS, RHS.get(), QuestionLoc, | |||
9061 | /*IsIntFirstExpr=*/true)) | |||
9062 | return RHSTy; | |||
9063 | if (checkPointerIntegerMismatch(*this, RHS, LHS.get(), QuestionLoc, | |||
9064 | /*IsIntFirstExpr=*/false)) | |||
9065 | return LHSTy; | |||
9066 | ||||
9067 | // Allow ?: operations in which both operands have the same | |||
9068 | // built-in sizeless type. | |||
9069 | if (LHSTy->isSizelessBuiltinType() && Context.hasSameType(LHSTy, RHSTy)) | |||
9070 | return Context.getCommonSugaredType(LHSTy, RHSTy); | |||
9071 | ||||
9072 | // Emit a better diagnostic if one of the expressions is a null pointer | |||
9073 | // constant and the other is not a pointer type. In this case, the user most | |||
9074 | // likely forgot to take the address of the other expression. | |||
9075 | if (DiagnoseConditionalForNull(LHS.get(), RHS.get(), QuestionLoc)) | |||
9076 | return QualType(); | |||
9077 | ||||
9078 | // Otherwise, the operands are not compatible. | |||
9079 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) | |||
9080 | << LHSTy << RHSTy << LHS.get()->getSourceRange() | |||
9081 | << RHS.get()->getSourceRange(); | |||
9082 | return QualType(); | |||
9083 | } | |||
9084 | ||||
9085 | /// FindCompositeObjCPointerType - Helper method to find composite type of | |||
9086 | /// two objective-c pointer types of the two input expressions. | |||
9087 | QualType Sema::FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, | |||
9088 | SourceLocation QuestionLoc) { | |||
9089 | QualType LHSTy = LHS.get()->getType(); | |||
9090 | QualType RHSTy = RHS.get()->getType(); | |||
9091 | ||||
9092 | // Handle things like Class and struct objc_class*. Here we case the result | |||
9093 | // to the pseudo-builtin, because that will be implicitly cast back to the | |||
9094 | // redefinition type if an attempt is made to access its fields. | |||
9095 | if (LHSTy->isObjCClassType() && | |||
9096 | (Context.hasSameType(RHSTy, Context.getObjCClassRedefinitionType()))) { | |||
9097 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_CPointerToObjCPointerCast); | |||
9098 | return LHSTy; | |||
9099 | } | |||
9100 | if (RHSTy->isObjCClassType() && | |||
9101 | (Context.hasSameType(LHSTy, Context.getObjCClassRedefinitionType()))) { | |||
9102 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_CPointerToObjCPointerCast); | |||
9103 | return RHSTy; | |||
9104 | } | |||
9105 | // And the same for struct objc_object* / id | |||
9106 | if (LHSTy->isObjCIdType() && | |||
9107 | (Context.hasSameType(RHSTy, Context.getObjCIdRedefinitionType()))) { | |||
9108 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_CPointerToObjCPointerCast); | |||
9109 | return LHSTy; | |||
9110 | } | |||
9111 | if (RHSTy->isObjCIdType() && | |||
9112 | (Context.hasSameType(LHSTy, Context.getObjCIdRedefinitionType()))) { | |||
9113 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_CPointerToObjCPointerCast); | |||
9114 | return RHSTy; | |||
9115 | } | |||
9116 | // And the same for struct objc_selector* / SEL | |||
9117 | if (Context.isObjCSelType(LHSTy) && | |||
9118 | (Context.hasSameType(RHSTy, Context.getObjCSelRedefinitionType()))) { | |||
9119 | RHS = ImpCastExprToType(RHS.get(), LHSTy, CK_BitCast); | |||
9120 | return LHSTy; | |||
9121 | } | |||
9122 | if (Context.isObjCSelType(RHSTy) && | |||
9123 | (Context.hasSameType(LHSTy, Context.getObjCSelRedefinitionType()))) { | |||
9124 | LHS = ImpCastExprToType(LHS.get(), RHSTy, CK_BitCast); | |||
9125 | return RHSTy; | |||
9126 | } | |||
9127 | // Check constraints for Objective-C object pointers types. | |||
9128 | if (LHSTy->isObjCObjectPointerType() && RHSTy->isObjCObjectPointerType()) { | |||
9129 | ||||
9130 | if (Context.getCanonicalType(LHSTy) == Context.getCanonicalType(RHSTy)) { | |||
9131 | // Two identical object pointer types are always compatible. | |||
9132 | return LHSTy; | |||
9133 | } | |||
9134 | const ObjCObjectPointerType *LHSOPT = LHSTy->castAs<ObjCObjectPointerType>(); | |||
9135 | const ObjCObjectPointerType *RHSOPT = RHSTy->castAs<ObjCObjectPointerType>(); | |||
9136 | QualType compositeType = LHSTy; | |||
9137 | ||||
9138 | // If both operands are interfaces and either operand can be | |||
9139 | // assigned to the other, use that type as the composite | |||
9140 | // type. This allows | |||
9141 | // xxx ? (A*) a : (B*) b | |||
9142 | // where B is a subclass of A. | |||
9143 | // | |||
9144 | // Additionally, as for assignment, if either type is 'id' | |||
9145 | // allow silent coercion. Finally, if the types are | |||
9146 | // incompatible then make sure to use 'id' as the composite | |||
9147 | // type so the result is acceptable for sending messages to. | |||
9148 | ||||
9149 | // FIXME: Consider unifying with 'areComparableObjCPointerTypes'. | |||
9150 | // It could return the composite type. | |||
9151 | if (!(compositeType = | |||
9152 | Context.areCommonBaseCompatible(LHSOPT, RHSOPT)).isNull()) { | |||
9153 | // Nothing more to do. | |||
9154 | } else if (Context.canAssignObjCInterfaces(LHSOPT, RHSOPT)) { | |||
9155 | compositeType = RHSOPT->isObjCBuiltinType() ? RHSTy : LHSTy; | |||
9156 | } else if (Context.canAssignObjCInterfaces(RHSOPT, LHSOPT)) { | |||
9157 | compositeType = LHSOPT->isObjCBuiltinType() ? LHSTy : RHSTy; | |||
9158 | } else if ((LHSOPT->isObjCQualifiedIdType() || | |||
9159 | RHSOPT->isObjCQualifiedIdType()) && | |||
9160 | Context.ObjCQualifiedIdTypesAreCompatible(LHSOPT, RHSOPT, | |||
9161 | true)) { | |||
9162 | // Need to handle "id<xx>" explicitly. | |||
9163 | // GCC allows qualified id and any Objective-C type to devolve to | |||
9164 | // id. Currently localizing to here until clear this should be | |||
9165 | // part of ObjCQualifiedIdTypesAreCompatible. | |||
9166 | compositeType = Context.getObjCIdType(); | |||
9167 | } else if (LHSTy->isObjCIdType() || RHSTy->isObjCIdType()) { | |||
9168 | compositeType = Context.getObjCIdType(); | |||
9169 | } else { | |||
9170 | Diag(QuestionLoc, diag::ext_typecheck_cond_incompatible_operands) | |||
9171 | << LHSTy << RHSTy | |||
9172 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
9173 | QualType incompatTy = Context.getObjCIdType(); | |||
9174 | LHS = ImpCastExprToType(LHS.get(), incompatTy, CK_BitCast); | |||
9175 | RHS = ImpCastExprToType(RHS.get(), incompatTy, CK_BitCast); | |||
9176 | return incompatTy; | |||
9177 | } | |||
9178 | // The object pointer types are compatible. | |||
9179 | LHS = ImpCastExprToType(LHS.get(), compositeType, CK_BitCast); | |||
9180 | RHS = ImpCastExprToType(RHS.get(), compositeType, CK_BitCast); | |||
9181 | return compositeType; | |||
9182 | } | |||
9183 | // Check Objective-C object pointer types and 'void *' | |||
9184 | if (LHSTy->isVoidPointerType() && RHSTy->isObjCObjectPointerType()) { | |||
9185 | if (getLangOpts().ObjCAutoRefCount) { | |||
9186 | // ARC forbids the implicit conversion of object pointers to 'void *', | |||
9187 | // so these types are not compatible. | |||
9188 | Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy | |||
9189 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
9190 | LHS = RHS = true; | |||
9191 | return QualType(); | |||
9192 | } | |||
9193 | QualType lhptee = LHSTy->castAs<PointerType>()->getPointeeType(); | |||
9194 | QualType rhptee = RHSTy->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9195 | QualType destPointee | |||
9196 | = Context.getQualifiedType(lhptee, rhptee.getQualifiers()); | |||
9197 | QualType destType = Context.getPointerType(destPointee); | |||
9198 | // Add qualifiers if necessary. | |||
9199 | LHS = ImpCastExprToType(LHS.get(), destType, CK_NoOp); | |||
9200 | // Promote to void*. | |||
9201 | RHS = ImpCastExprToType(RHS.get(), destType, CK_BitCast); | |||
9202 | return destType; | |||
9203 | } | |||
9204 | if (LHSTy->isObjCObjectPointerType() && RHSTy->isVoidPointerType()) { | |||
9205 | if (getLangOpts().ObjCAutoRefCount) { | |||
9206 | // ARC forbids the implicit conversion of object pointers to 'void *', | |||
9207 | // so these types are not compatible. | |||
9208 | Diag(QuestionLoc, diag::err_cond_voidptr_arc) << LHSTy << RHSTy | |||
9209 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
9210 | LHS = RHS = true; | |||
9211 | return QualType(); | |||
9212 | } | |||
9213 | QualType lhptee = LHSTy->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9214 | QualType rhptee = RHSTy->castAs<PointerType>()->getPointeeType(); | |||
9215 | QualType destPointee | |||
9216 | = Context.getQualifiedType(rhptee, lhptee.getQualifiers()); | |||
9217 | QualType destType = Context.getPointerType(destPointee); | |||
9218 | // Add qualifiers if necessary. | |||
9219 | RHS = ImpCastExprToType(RHS.get(), destType, CK_NoOp); | |||
9220 | // Promote to void*. | |||
9221 | LHS = ImpCastExprToType(LHS.get(), destType, CK_BitCast); | |||
9222 | return destType; | |||
9223 | } | |||
9224 | return QualType(); | |||
9225 | } | |||
9226 | ||||
9227 | /// SuggestParentheses - Emit a note with a fixit hint that wraps | |||
9228 | /// ParenRange in parentheses. | |||
9229 | static void SuggestParentheses(Sema &Self, SourceLocation Loc, | |||
9230 | const PartialDiagnostic &Note, | |||
9231 | SourceRange ParenRange) { | |||
9232 | SourceLocation EndLoc = Self.getLocForEndOfToken(ParenRange.getEnd()); | |||
9233 | if (ParenRange.getBegin().isFileID() && ParenRange.getEnd().isFileID() && | |||
9234 | EndLoc.isValid()) { | |||
9235 | Self.Diag(Loc, Note) | |||
9236 | << FixItHint::CreateInsertion(ParenRange.getBegin(), "(") | |||
9237 | << FixItHint::CreateInsertion(EndLoc, ")"); | |||
9238 | } else { | |||
9239 | // We can't display the parentheses, so just show the bare note. | |||
9240 | Self.Diag(Loc, Note) << ParenRange; | |||
9241 | } | |||
9242 | } | |||
9243 | ||||
9244 | static bool IsArithmeticOp(BinaryOperatorKind Opc) { | |||
9245 | return BinaryOperator::isAdditiveOp(Opc) || | |||
9246 | BinaryOperator::isMultiplicativeOp(Opc) || | |||
9247 | BinaryOperator::isShiftOp(Opc) || Opc == BO_And || Opc == BO_Or; | |||
9248 | // This only checks for bitwise-or and bitwise-and, but not bitwise-xor and | |||
9249 | // not any of the logical operators. Bitwise-xor is commonly used as a | |||
9250 | // logical-xor because there is no logical-xor operator. The logical | |||
9251 | // operators, including uses of xor, have a high false positive rate for | |||
9252 | // precedence warnings. | |||
9253 | } | |||
9254 | ||||
9255 | /// IsArithmeticBinaryExpr - Returns true if E is an arithmetic binary | |||
9256 | /// expression, either using a built-in or overloaded operator, | |||
9257 | /// and sets *OpCode to the opcode and *RHSExprs to the right-hand side | |||
9258 | /// expression. | |||
9259 | static bool IsArithmeticBinaryExpr(Expr *E, BinaryOperatorKind *Opcode, | |||
9260 | Expr **RHSExprs) { | |||
9261 | // Don't strip parenthesis: we should not warn if E is in parenthesis. | |||
9262 | E = E->IgnoreImpCasts(); | |||
9263 | E = E->IgnoreConversionOperatorSingleStep(); | |||
9264 | E = E->IgnoreImpCasts(); | |||
9265 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
9266 | E = MTE->getSubExpr(); | |||
9267 | E = E->IgnoreImpCasts(); | |||
9268 | } | |||
9269 | ||||
9270 | // Built-in binary operator. | |||
9271 | if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E)) { | |||
9272 | if (IsArithmeticOp(OP->getOpcode())) { | |||
9273 | *Opcode = OP->getOpcode(); | |||
9274 | *RHSExprs = OP->getRHS(); | |||
9275 | return true; | |||
9276 | } | |||
9277 | } | |||
9278 | ||||
9279 | // Overloaded operator. | |||
9280 | if (CXXOperatorCallExpr *Call = dyn_cast<CXXOperatorCallExpr>(E)) { | |||
9281 | if (Call->getNumArgs() != 2) | |||
9282 | return false; | |||
9283 | ||||
9284 | // Make sure this is really a binary operator that is safe to pass into | |||
9285 | // BinaryOperator::getOverloadedOpcode(), e.g. it's not a subscript op. | |||
9286 | OverloadedOperatorKind OO = Call->getOperator(); | |||
9287 | if (OO < OO_Plus || OO > OO_Arrow || | |||
9288 | OO == OO_PlusPlus || OO == OO_MinusMinus) | |||
9289 | return false; | |||
9290 | ||||
9291 | BinaryOperatorKind OpKind = BinaryOperator::getOverloadedOpcode(OO); | |||
9292 | if (IsArithmeticOp(OpKind)) { | |||
9293 | *Opcode = OpKind; | |||
9294 | *RHSExprs = Call->getArg(1); | |||
9295 | return true; | |||
9296 | } | |||
9297 | } | |||
9298 | ||||
9299 | return false; | |||
9300 | } | |||
9301 | ||||
9302 | /// ExprLooksBoolean - Returns true if E looks boolean, i.e. it has boolean type | |||
9303 | /// or is a logical expression such as (x==y) which has int type, but is | |||
9304 | /// commonly interpreted as boolean. | |||
9305 | static bool ExprLooksBoolean(Expr *E) { | |||
9306 | E = E->IgnoreParenImpCasts(); | |||
9307 | ||||
9308 | if (E->getType()->isBooleanType()) | |||
9309 | return true; | |||
9310 | if (BinaryOperator *OP = dyn_cast<BinaryOperator>(E)) | |||
9311 | return OP->isComparisonOp() || OP->isLogicalOp(); | |||
9312 | if (UnaryOperator *OP = dyn_cast<UnaryOperator>(E)) | |||
9313 | return OP->getOpcode() == UO_LNot; | |||
9314 | if (E->getType()->isPointerType()) | |||
9315 | return true; | |||
9316 | // FIXME: What about overloaded operator calls returning "unspecified boolean | |||
9317 | // type"s (commonly pointer-to-members)? | |||
9318 | ||||
9319 | return false; | |||
9320 | } | |||
9321 | ||||
9322 | /// DiagnoseConditionalPrecedence - Emit a warning when a conditional operator | |||
9323 | /// and binary operator are mixed in a way that suggests the programmer assumed | |||
9324 | /// the conditional operator has higher precedence, for example: | |||
9325 | /// "int x = a + someBinaryCondition ? 1 : 2". | |||
9326 | static void DiagnoseConditionalPrecedence(Sema &Self, | |||
9327 | SourceLocation OpLoc, | |||
9328 | Expr *Condition, | |||
9329 | Expr *LHSExpr, | |||
9330 | Expr *RHSExpr) { | |||
9331 | BinaryOperatorKind CondOpcode; | |||
9332 | Expr *CondRHS; | |||
9333 | ||||
9334 | if (!IsArithmeticBinaryExpr(Condition, &CondOpcode, &CondRHS)) | |||
9335 | return; | |||
9336 | if (!ExprLooksBoolean(CondRHS)) | |||
9337 | return; | |||
9338 | ||||
9339 | // The condition is an arithmetic binary expression, with a right- | |||
9340 | // hand side that looks boolean, so warn. | |||
9341 | ||||
9342 | unsigned DiagID = BinaryOperator::isBitwiseOp(CondOpcode) | |||
9343 | ? diag::warn_precedence_bitwise_conditional | |||
9344 | : diag::warn_precedence_conditional; | |||
9345 | ||||
9346 | Self.Diag(OpLoc, DiagID) | |||
9347 | << Condition->getSourceRange() | |||
9348 | << BinaryOperator::getOpcodeStr(CondOpcode); | |||
9349 | ||||
9350 | SuggestParentheses( | |||
9351 | Self, OpLoc, | |||
9352 | Self.PDiag(diag::note_precedence_silence) | |||
9353 | << BinaryOperator::getOpcodeStr(CondOpcode), | |||
9354 | SourceRange(Condition->getBeginLoc(), Condition->getEndLoc())); | |||
9355 | ||||
9356 | SuggestParentheses(Self, OpLoc, | |||
9357 | Self.PDiag(diag::note_precedence_conditional_first), | |||
9358 | SourceRange(CondRHS->getBeginLoc(), RHSExpr->getEndLoc())); | |||
9359 | } | |||
9360 | ||||
9361 | /// Compute the nullability of a conditional expression. | |||
9362 | static QualType computeConditionalNullability(QualType ResTy, bool IsBin, | |||
9363 | QualType LHSTy, QualType RHSTy, | |||
9364 | ASTContext &Ctx) { | |||
9365 | if (!ResTy->isAnyPointerType()) | |||
9366 | return ResTy; | |||
9367 | ||||
9368 | auto GetNullability = [](QualType Ty) { | |||
9369 | std::optional<NullabilityKind> Kind = Ty->getNullability(); | |||
9370 | if (Kind) { | |||
9371 | // For our purposes, treat _Nullable_result as _Nullable. | |||
9372 | if (*Kind == NullabilityKind::NullableResult) | |||
9373 | return NullabilityKind::Nullable; | |||
9374 | return *Kind; | |||
9375 | } | |||
9376 | return NullabilityKind::Unspecified; | |||
9377 | }; | |||
9378 | ||||
9379 | auto LHSKind = GetNullability(LHSTy), RHSKind = GetNullability(RHSTy); | |||
9380 | NullabilityKind MergedKind; | |||
9381 | ||||
9382 | // Compute nullability of a binary conditional expression. | |||
9383 | if (IsBin) { | |||
9384 | if (LHSKind == NullabilityKind::NonNull) | |||
9385 | MergedKind = NullabilityKind::NonNull; | |||
9386 | else | |||
9387 | MergedKind = RHSKind; | |||
9388 | // Compute nullability of a normal conditional expression. | |||
9389 | } else { | |||
9390 | if (LHSKind == NullabilityKind::Nullable || | |||
9391 | RHSKind == NullabilityKind::Nullable) | |||
9392 | MergedKind = NullabilityKind::Nullable; | |||
9393 | else if (LHSKind == NullabilityKind::NonNull) | |||
9394 | MergedKind = RHSKind; | |||
9395 | else if (RHSKind == NullabilityKind::NonNull) | |||
9396 | MergedKind = LHSKind; | |||
9397 | else | |||
9398 | MergedKind = NullabilityKind::Unspecified; | |||
9399 | } | |||
9400 | ||||
9401 | // Return if ResTy already has the correct nullability. | |||
9402 | if (GetNullability(ResTy) == MergedKind) | |||
9403 | return ResTy; | |||
9404 | ||||
9405 | // Strip all nullability from ResTy. | |||
9406 | while (ResTy->getNullability()) | |||
9407 | ResTy = ResTy.getSingleStepDesugaredType(Ctx); | |||
9408 | ||||
9409 | // Create a new AttributedType with the new nullability kind. | |||
9410 | auto NewAttr = AttributedType::getNullabilityAttrKind(MergedKind); | |||
9411 | return Ctx.getAttributedType(NewAttr, ResTy, ResTy); | |||
9412 | } | |||
9413 | ||||
9414 | /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null | |||
9415 | /// in the case of a the GNU conditional expr extension. | |||
9416 | ExprResult Sema::ActOnConditionalOp(SourceLocation QuestionLoc, | |||
9417 | SourceLocation ColonLoc, | |||
9418 | Expr *CondExpr, Expr *LHSExpr, | |||
9419 | Expr *RHSExpr) { | |||
9420 | if (!Context.isDependenceAllowed()) { | |||
9421 | // C cannot handle TypoExpr nodes in the condition because it | |||
9422 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
9423 | // been dealt with before checking the operands. | |||
9424 | ExprResult CondResult = CorrectDelayedTyposInExpr(CondExpr); | |||
9425 | ExprResult LHSResult = CorrectDelayedTyposInExpr(LHSExpr); | |||
9426 | ExprResult RHSResult = CorrectDelayedTyposInExpr(RHSExpr); | |||
9427 | ||||
9428 | if (!CondResult.isUsable()) | |||
9429 | return ExprError(); | |||
9430 | ||||
9431 | if (LHSExpr) { | |||
9432 | if (!LHSResult.isUsable()) | |||
9433 | return ExprError(); | |||
9434 | } | |||
9435 | ||||
9436 | if (!RHSResult.isUsable()) | |||
9437 | return ExprError(); | |||
9438 | ||||
9439 | CondExpr = CondResult.get(); | |||
9440 | LHSExpr = LHSResult.get(); | |||
9441 | RHSExpr = RHSResult.get(); | |||
9442 | } | |||
9443 | ||||
9444 | // If this is the gnu "x ?: y" extension, analyze the types as though the LHS | |||
9445 | // was the condition. | |||
9446 | OpaqueValueExpr *opaqueValue = nullptr; | |||
9447 | Expr *commonExpr = nullptr; | |||
9448 | if (!LHSExpr) { | |||
9449 | commonExpr = CondExpr; | |||
9450 | // Lower out placeholder types first. This is important so that we don't | |||
9451 | // try to capture a placeholder. This happens in few cases in C++; such | |||
9452 | // as Objective-C++'s dictionary subscripting syntax. | |||
9453 | if (commonExpr->hasPlaceholderType()) { | |||
9454 | ExprResult result = CheckPlaceholderExpr(commonExpr); | |||
9455 | if (!result.isUsable()) return ExprError(); | |||
9456 | commonExpr = result.get(); | |||
9457 | } | |||
9458 | // We usually want to apply unary conversions *before* saving, except | |||
9459 | // in the special case of a C++ l-value conditional. | |||
9460 | if (!(getLangOpts().CPlusPlus | |||
9461 | && !commonExpr->isTypeDependent() | |||
9462 | && commonExpr->getValueKind() == RHSExpr->getValueKind() | |||
9463 | && commonExpr->isGLValue() | |||
9464 | && commonExpr->isOrdinaryOrBitFieldObject() | |||
9465 | && RHSExpr->isOrdinaryOrBitFieldObject() | |||
9466 | && Context.hasSameType(commonExpr->getType(), RHSExpr->getType()))) { | |||
9467 | ExprResult commonRes = UsualUnaryConversions(commonExpr); | |||
9468 | if (commonRes.isInvalid()) | |||
9469 | return ExprError(); | |||
9470 | commonExpr = commonRes.get(); | |||
9471 | } | |||
9472 | ||||
9473 | // If the common expression is a class or array prvalue, materialize it | |||
9474 | // so that we can safely refer to it multiple times. | |||
9475 | if (commonExpr->isPRValue() && (commonExpr->getType()->isRecordType() || | |||
9476 | commonExpr->getType()->isArrayType())) { | |||
9477 | ExprResult MatExpr = TemporaryMaterializationConversion(commonExpr); | |||
9478 | if (MatExpr.isInvalid()) | |||
9479 | return ExprError(); | |||
9480 | commonExpr = MatExpr.get(); | |||
9481 | } | |||
9482 | ||||
9483 | opaqueValue = new (Context) OpaqueValueExpr(commonExpr->getExprLoc(), | |||
9484 | commonExpr->getType(), | |||
9485 | commonExpr->getValueKind(), | |||
9486 | commonExpr->getObjectKind(), | |||
9487 | commonExpr); | |||
9488 | LHSExpr = CondExpr = opaqueValue; | |||
9489 | } | |||
9490 | ||||
9491 | QualType LHSTy = LHSExpr->getType(), RHSTy = RHSExpr->getType(); | |||
9492 | ExprValueKind VK = VK_PRValue; | |||
9493 | ExprObjectKind OK = OK_Ordinary; | |||
9494 | ExprResult Cond = CondExpr, LHS = LHSExpr, RHS = RHSExpr; | |||
9495 | QualType result = CheckConditionalOperands(Cond, LHS, RHS, | |||
9496 | VK, OK, QuestionLoc); | |||
9497 | if (result.isNull() || Cond.isInvalid() || LHS.isInvalid() || | |||
9498 | RHS.isInvalid()) | |||
9499 | return ExprError(); | |||
9500 | ||||
9501 | DiagnoseConditionalPrecedence(*this, QuestionLoc, Cond.get(), LHS.get(), | |||
9502 | RHS.get()); | |||
9503 | ||||
9504 | CheckBoolLikeConversion(Cond.get(), QuestionLoc); | |||
9505 | ||||
9506 | result = computeConditionalNullability(result, commonExpr, LHSTy, RHSTy, | |||
9507 | Context); | |||
9508 | ||||
9509 | if (!commonExpr) | |||
9510 | return new (Context) | |||
9511 | ConditionalOperator(Cond.get(), QuestionLoc, LHS.get(), ColonLoc, | |||
9512 | RHS.get(), result, VK, OK); | |||
9513 | ||||
9514 | return new (Context) BinaryConditionalOperator( | |||
9515 | commonExpr, opaqueValue, Cond.get(), LHS.get(), RHS.get(), QuestionLoc, | |||
9516 | ColonLoc, result, VK, OK); | |||
9517 | } | |||
9518 | ||||
9519 | // Check if we have a conversion between incompatible cmse function pointer | |||
9520 | // types, that is, a conversion between a function pointer with the | |||
9521 | // cmse_nonsecure_call attribute and one without. | |||
9522 | static bool IsInvalidCmseNSCallConversion(Sema &S, QualType FromType, | |||
9523 | QualType ToType) { | |||
9524 | if (const auto *ToFn = | |||
9525 | dyn_cast<FunctionType>(S.Context.getCanonicalType(ToType))) { | |||
9526 | if (const auto *FromFn = | |||
9527 | dyn_cast<FunctionType>(S.Context.getCanonicalType(FromType))) { | |||
9528 | FunctionType::ExtInfo ToEInfo = ToFn->getExtInfo(); | |||
9529 | FunctionType::ExtInfo FromEInfo = FromFn->getExtInfo(); | |||
9530 | ||||
9531 | return ToEInfo.getCmseNSCall() != FromEInfo.getCmseNSCall(); | |||
9532 | } | |||
9533 | } | |||
9534 | return false; | |||
9535 | } | |||
9536 | ||||
9537 | // checkPointerTypesForAssignment - This is a very tricky routine (despite | |||
9538 | // being closely modeled after the C99 spec:-). The odd characteristic of this | |||
9539 | // routine is it effectively iqnores the qualifiers on the top level pointee. | |||
9540 | // This circumvents the usual type rules specified in 6.2.7p1 & 6.7.5.[1-3]. | |||
9541 | // FIXME: add a couple examples in this comment. | |||
9542 | static Sema::AssignConvertType | |||
9543 | checkPointerTypesForAssignment(Sema &S, QualType LHSType, QualType RHSType, | |||
9544 | SourceLocation Loc) { | |||
9545 | assert(LHSType.isCanonical() && "LHS not canonicalized!")(static_cast <bool> (LHSType.isCanonical() && "LHS not canonicalized!" ) ? void (0) : __assert_fail ("LHSType.isCanonical() && \"LHS not canonicalized!\"" , "clang/lib/Sema/SemaExpr.cpp", 9545, __extension__ __PRETTY_FUNCTION__ )); | |||
9546 | assert(RHSType.isCanonical() && "RHS not canonicalized!")(static_cast <bool> (RHSType.isCanonical() && "RHS not canonicalized!" ) ? void (0) : __assert_fail ("RHSType.isCanonical() && \"RHS not canonicalized!\"" , "clang/lib/Sema/SemaExpr.cpp", 9546, __extension__ __PRETTY_FUNCTION__ )); | |||
9547 | ||||
9548 | // get the "pointed to" type (ignoring qualifiers at the top level) | |||
9549 | const Type *lhptee, *rhptee; | |||
9550 | Qualifiers lhq, rhq; | |||
9551 | std::tie(lhptee, lhq) = | |||
9552 | cast<PointerType>(LHSType)->getPointeeType().split().asPair(); | |||
9553 | std::tie(rhptee, rhq) = | |||
9554 | cast<PointerType>(RHSType)->getPointeeType().split().asPair(); | |||
9555 | ||||
9556 | Sema::AssignConvertType ConvTy = Sema::Compatible; | |||
9557 | ||||
9558 | // C99 6.5.16.1p1: This following citation is common to constraints | |||
9559 | // 3 & 4 (below). ...and the type *pointed to* by the left has all the | |||
9560 | // qualifiers of the type *pointed to* by the right; | |||
9561 | ||||
9562 | // As a special case, 'non-__weak A *' -> 'non-__weak const *' is okay. | |||
9563 | if (lhq.getObjCLifetime() != rhq.getObjCLifetime() && | |||
9564 | lhq.compatiblyIncludesObjCLifetime(rhq)) { | |||
9565 | // Ignore lifetime for further calculation. | |||
9566 | lhq.removeObjCLifetime(); | |||
9567 | rhq.removeObjCLifetime(); | |||
9568 | } | |||
9569 | ||||
9570 | if (!lhq.compatiblyIncludes(rhq)) { | |||
9571 | // Treat address-space mismatches as fatal. | |||
9572 | if (!lhq.isAddressSpaceSupersetOf(rhq)) | |||
9573 | return Sema::IncompatiblePointerDiscardsQualifiers; | |||
9574 | ||||
9575 | // It's okay to add or remove GC or lifetime qualifiers when converting to | |||
9576 | // and from void*. | |||
9577 | else if (lhq.withoutObjCGCAttr().withoutObjCLifetime() | |||
9578 | .compatiblyIncludes( | |||
9579 | rhq.withoutObjCGCAttr().withoutObjCLifetime()) | |||
9580 | && (lhptee->isVoidType() || rhptee->isVoidType())) | |||
9581 | ; // keep old | |||
9582 | ||||
9583 | // Treat lifetime mismatches as fatal. | |||
9584 | else if (lhq.getObjCLifetime() != rhq.getObjCLifetime()) | |||
9585 | ConvTy = Sema::IncompatiblePointerDiscardsQualifiers; | |||
9586 | ||||
9587 | // For GCC/MS compatibility, other qualifier mismatches are treated | |||
9588 | // as still compatible in C. | |||
9589 | else ConvTy = Sema::CompatiblePointerDiscardsQualifiers; | |||
9590 | } | |||
9591 | ||||
9592 | // C99 6.5.16.1p1 (constraint 4): If one operand is a pointer to an object or | |||
9593 | // incomplete type and the other is a pointer to a qualified or unqualified | |||
9594 | // version of void... | |||
9595 | if (lhptee->isVoidType()) { | |||
9596 | if (rhptee->isIncompleteOrObjectType()) | |||
9597 | return ConvTy; | |||
9598 | ||||
9599 | // As an extension, we allow cast to/from void* to function pointer. | |||
9600 | assert(rhptee->isFunctionType())(static_cast <bool> (rhptee->isFunctionType()) ? void (0) : __assert_fail ("rhptee->isFunctionType()", "clang/lib/Sema/SemaExpr.cpp" , 9600, __extension__ __PRETTY_FUNCTION__)); | |||
9601 | return Sema::FunctionVoidPointer; | |||
9602 | } | |||
9603 | ||||
9604 | if (rhptee->isVoidType()) { | |||
9605 | if (lhptee->isIncompleteOrObjectType()) | |||
9606 | return ConvTy; | |||
9607 | ||||
9608 | // As an extension, we allow cast to/from void* to function pointer. | |||
9609 | assert(lhptee->isFunctionType())(static_cast <bool> (lhptee->isFunctionType()) ? void (0) : __assert_fail ("lhptee->isFunctionType()", "clang/lib/Sema/SemaExpr.cpp" , 9609, __extension__ __PRETTY_FUNCTION__)); | |||
9610 | return Sema::FunctionVoidPointer; | |||
9611 | } | |||
9612 | ||||
9613 | if (!S.Diags.isIgnored( | |||
9614 | diag::warn_typecheck_convert_incompatible_function_pointer_strict, | |||
9615 | Loc) && | |||
9616 | RHSType->isFunctionPointerType() && LHSType->isFunctionPointerType() && | |||
9617 | !S.IsFunctionConversion(RHSType, LHSType, RHSType)) | |||
9618 | return Sema::IncompatibleFunctionPointerStrict; | |||
9619 | ||||
9620 | // C99 6.5.16.1p1 (constraint 3): both operands are pointers to qualified or | |||
9621 | // unqualified versions of compatible types, ... | |||
9622 | QualType ltrans = QualType(lhptee, 0), rtrans = QualType(rhptee, 0); | |||
9623 | if (!S.Context.typesAreCompatible(ltrans, rtrans)) { | |||
9624 | // Check if the pointee types are compatible ignoring the sign. | |||
9625 | // We explicitly check for char so that we catch "char" vs | |||
9626 | // "unsigned char" on systems where "char" is unsigned. | |||
9627 | if (lhptee->isCharType()) | |||
9628 | ltrans = S.Context.UnsignedCharTy; | |||
9629 | else if (lhptee->hasSignedIntegerRepresentation()) | |||
9630 | ltrans = S.Context.getCorrespondingUnsignedType(ltrans); | |||
9631 | ||||
9632 | if (rhptee->isCharType()) | |||
9633 | rtrans = S.Context.UnsignedCharTy; | |||
9634 | else if (rhptee->hasSignedIntegerRepresentation()) | |||
9635 | rtrans = S.Context.getCorrespondingUnsignedType(rtrans); | |||
9636 | ||||
9637 | if (ltrans == rtrans) { | |||
9638 | // Types are compatible ignoring the sign. Qualifier incompatibility | |||
9639 | // takes priority over sign incompatibility because the sign | |||
9640 | // warning can be disabled. | |||
9641 | if (ConvTy != Sema::Compatible) | |||
9642 | return ConvTy; | |||
9643 | ||||
9644 | return Sema::IncompatiblePointerSign; | |||
9645 | } | |||
9646 | ||||
9647 | // If we are a multi-level pointer, it's possible that our issue is simply | |||
9648 | // one of qualification - e.g. char ** -> const char ** is not allowed. If | |||
9649 | // the eventual target type is the same and the pointers have the same | |||
9650 | // level of indirection, this must be the issue. | |||
9651 | if (isa<PointerType>(lhptee) && isa<PointerType>(rhptee)) { | |||
9652 | do { | |||
9653 | std::tie(lhptee, lhq) = | |||
9654 | cast<PointerType>(lhptee)->getPointeeType().split().asPair(); | |||
9655 | std::tie(rhptee, rhq) = | |||
9656 | cast<PointerType>(rhptee)->getPointeeType().split().asPair(); | |||
9657 | ||||
9658 | // Inconsistent address spaces at this point is invalid, even if the | |||
9659 | // address spaces would be compatible. | |||
9660 | // FIXME: This doesn't catch address space mismatches for pointers of | |||
9661 | // different nesting levels, like: | |||
9662 | // __local int *** a; | |||
9663 | // int ** b = a; | |||
9664 | // It's not clear how to actually determine when such pointers are | |||
9665 | // invalidly incompatible. | |||
9666 | if (lhq.getAddressSpace() != rhq.getAddressSpace()) | |||
9667 | return Sema::IncompatibleNestedPointerAddressSpaceMismatch; | |||
9668 | ||||
9669 | } while (isa<PointerType>(lhptee) && isa<PointerType>(rhptee)); | |||
9670 | ||||
9671 | if (lhptee == rhptee) | |||
9672 | return Sema::IncompatibleNestedPointerQualifiers; | |||
9673 | } | |||
9674 | ||||
9675 | // General pointer incompatibility takes priority over qualifiers. | |||
9676 | if (RHSType->isFunctionPointerType() && LHSType->isFunctionPointerType()) | |||
9677 | return Sema::IncompatibleFunctionPointer; | |||
9678 | return Sema::IncompatiblePointer; | |||
9679 | } | |||
9680 | if (!S.getLangOpts().CPlusPlus && | |||
9681 | S.IsFunctionConversion(ltrans, rtrans, ltrans)) | |||
9682 | return Sema::IncompatibleFunctionPointer; | |||
9683 | if (IsInvalidCmseNSCallConversion(S, ltrans, rtrans)) | |||
9684 | return Sema::IncompatibleFunctionPointer; | |||
9685 | return ConvTy; | |||
9686 | } | |||
9687 | ||||
9688 | /// checkBlockPointerTypesForAssignment - This routine determines whether two | |||
9689 | /// block pointer types are compatible or whether a block and normal pointer | |||
9690 | /// are compatible. It is more restrict than comparing two function pointer | |||
9691 | // types. | |||
9692 | static Sema::AssignConvertType | |||
9693 | checkBlockPointerTypesForAssignment(Sema &S, QualType LHSType, | |||
9694 | QualType RHSType) { | |||
9695 | assert(LHSType.isCanonical() && "LHS not canonicalized!")(static_cast <bool> (LHSType.isCanonical() && "LHS not canonicalized!" ) ? void (0) : __assert_fail ("LHSType.isCanonical() && \"LHS not canonicalized!\"" , "clang/lib/Sema/SemaExpr.cpp", 9695, __extension__ __PRETTY_FUNCTION__ )); | |||
9696 | assert(RHSType.isCanonical() && "RHS not canonicalized!")(static_cast <bool> (RHSType.isCanonical() && "RHS not canonicalized!" ) ? void (0) : __assert_fail ("RHSType.isCanonical() && \"RHS not canonicalized!\"" , "clang/lib/Sema/SemaExpr.cpp", 9696, __extension__ __PRETTY_FUNCTION__ )); | |||
9697 | ||||
9698 | QualType lhptee, rhptee; | |||
9699 | ||||
9700 | // get the "pointed to" type (ignoring qualifiers at the top level) | |||
9701 | lhptee = cast<BlockPointerType>(LHSType)->getPointeeType(); | |||
9702 | rhptee = cast<BlockPointerType>(RHSType)->getPointeeType(); | |||
9703 | ||||
9704 | // In C++, the types have to match exactly. | |||
9705 | if (S.getLangOpts().CPlusPlus) | |||
9706 | return Sema::IncompatibleBlockPointer; | |||
9707 | ||||
9708 | Sema::AssignConvertType ConvTy = Sema::Compatible; | |||
9709 | ||||
9710 | // For blocks we enforce that qualifiers are identical. | |||
9711 | Qualifiers LQuals = lhptee.getLocalQualifiers(); | |||
9712 | Qualifiers RQuals = rhptee.getLocalQualifiers(); | |||
9713 | if (S.getLangOpts().OpenCL) { | |||
9714 | LQuals.removeAddressSpace(); | |||
9715 | RQuals.removeAddressSpace(); | |||
9716 | } | |||
9717 | if (LQuals != RQuals) | |||
9718 | ConvTy = Sema::CompatiblePointerDiscardsQualifiers; | |||
9719 | ||||
9720 | // FIXME: OpenCL doesn't define the exact compile time semantics for a block | |||
9721 | // assignment. | |||
9722 | // The current behavior is similar to C++ lambdas. A block might be | |||
9723 | // assigned to a variable iff its return type and parameters are compatible | |||
9724 | // (C99 6.2.7) with the corresponding return type and parameters of the LHS of | |||
9725 | // an assignment. Presumably it should behave in way that a function pointer | |||
9726 | // assignment does in C, so for each parameter and return type: | |||
9727 | // * CVR and address space of LHS should be a superset of CVR and address | |||
9728 | // space of RHS. | |||
9729 | // * unqualified types should be compatible. | |||
9730 | if (S.getLangOpts().OpenCL) { | |||
9731 | if (!S.Context.typesAreBlockPointerCompatible( | |||
9732 | S.Context.getQualifiedType(LHSType.getUnqualifiedType(), LQuals), | |||
9733 | S.Context.getQualifiedType(RHSType.getUnqualifiedType(), RQuals))) | |||
9734 | return Sema::IncompatibleBlockPointer; | |||
9735 | } else if (!S.Context.typesAreBlockPointerCompatible(LHSType, RHSType)) | |||
9736 | return Sema::IncompatibleBlockPointer; | |||
9737 | ||||
9738 | return ConvTy; | |||
9739 | } | |||
9740 | ||||
9741 | /// checkObjCPointerTypesForAssignment - Compares two objective-c pointer types | |||
9742 | /// for assignment compatibility. | |||
9743 | static Sema::AssignConvertType | |||
9744 | checkObjCPointerTypesForAssignment(Sema &S, QualType LHSType, | |||
9745 | QualType RHSType) { | |||
9746 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 9746, __extension__ __PRETTY_FUNCTION__ )); | |||
9747 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 9747, __extension__ __PRETTY_FUNCTION__ )); | |||
9748 | ||||
9749 | if (LHSType->isObjCBuiltinType()) { | |||
9750 | // Class is not compatible with ObjC object pointers. | |||
9751 | if (LHSType->isObjCClassType() && !RHSType->isObjCBuiltinType() && | |||
9752 | !RHSType->isObjCQualifiedClassType()) | |||
9753 | return Sema::IncompatiblePointer; | |||
9754 | return Sema::Compatible; | |||
9755 | } | |||
9756 | if (RHSType->isObjCBuiltinType()) { | |||
9757 | if (RHSType->isObjCClassType() && !LHSType->isObjCBuiltinType() && | |||
9758 | !LHSType->isObjCQualifiedClassType()) | |||
9759 | return Sema::IncompatiblePointer; | |||
9760 | return Sema::Compatible; | |||
9761 | } | |||
9762 | QualType lhptee = LHSType->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9763 | QualType rhptee = RHSType->castAs<ObjCObjectPointerType>()->getPointeeType(); | |||
9764 | ||||
9765 | if (!lhptee.isAtLeastAsQualifiedAs(rhptee) && | |||
9766 | // make an exception for id<P> | |||
9767 | !LHSType->isObjCQualifiedIdType()) | |||
9768 | return Sema::CompatiblePointerDiscardsQualifiers; | |||
9769 | ||||
9770 | if (S.Context.typesAreCompatible(LHSType, RHSType)) | |||
9771 | return Sema::Compatible; | |||
9772 | if (LHSType->isObjCQualifiedIdType() || RHSType->isObjCQualifiedIdType()) | |||
9773 | return Sema::IncompatibleObjCQualifiedId; | |||
9774 | return Sema::IncompatiblePointer; | |||
9775 | } | |||
9776 | ||||
9777 | Sema::AssignConvertType | |||
9778 | Sema::CheckAssignmentConstraints(SourceLocation Loc, | |||
9779 | QualType LHSType, QualType RHSType) { | |||
9780 | // Fake up an opaque expression. We don't actually care about what | |||
9781 | // cast operations are required, so if CheckAssignmentConstraints | |||
9782 | // adds casts to this they'll be wasted, but fortunately that doesn't | |||
9783 | // usually happen on valid code. | |||
9784 | OpaqueValueExpr RHSExpr(Loc, RHSType, VK_PRValue); | |||
9785 | ExprResult RHSPtr = &RHSExpr; | |||
9786 | CastKind K; | |||
9787 | ||||
9788 | return CheckAssignmentConstraints(LHSType, RHSPtr, K, /*ConvertRHS=*/false); | |||
9789 | } | |||
9790 | ||||
9791 | /// This helper function returns true if QT is a vector type that has element | |||
9792 | /// type ElementType. | |||
9793 | static bool isVector(QualType QT, QualType ElementType) { | |||
9794 | if (const VectorType *VT = QT->getAs<VectorType>()) | |||
9795 | return VT->getElementType().getCanonicalType() == ElementType; | |||
9796 | return false; | |||
9797 | } | |||
9798 | ||||
9799 | /// CheckAssignmentConstraints (C99 6.5.16) - This routine currently | |||
9800 | /// has code to accommodate several GCC extensions when type checking | |||
9801 | /// pointers. Here are some objectionable examples that GCC considers warnings: | |||
9802 | /// | |||
9803 | /// int a, *pint; | |||
9804 | /// short *pshort; | |||
9805 | /// struct foo *pfoo; | |||
9806 | /// | |||
9807 | /// pint = pshort; // warning: assignment from incompatible pointer type | |||
9808 | /// a = pint; // warning: assignment makes integer from pointer without a cast | |||
9809 | /// pint = a; // warning: assignment makes pointer from integer without a cast | |||
9810 | /// pint = pfoo; // warning: assignment from incompatible pointer type | |||
9811 | /// | |||
9812 | /// As a result, the code for dealing with pointers is more complex than the | |||
9813 | /// C99 spec dictates. | |||
9814 | /// | |||
9815 | /// Sets 'Kind' for any result kind except Incompatible. | |||
9816 | Sema::AssignConvertType | |||
9817 | Sema::CheckAssignmentConstraints(QualType LHSType, ExprResult &RHS, | |||
9818 | CastKind &Kind, bool ConvertRHS) { | |||
9819 | QualType RHSType = RHS.get()->getType(); | |||
9820 | QualType OrigLHSType = LHSType; | |||
9821 | ||||
9822 | // Get canonical types. We're not formatting these types, just comparing | |||
9823 | // them. | |||
9824 | LHSType = Context.getCanonicalType(LHSType).getUnqualifiedType(); | |||
9825 | RHSType = Context.getCanonicalType(RHSType).getUnqualifiedType(); | |||
9826 | ||||
9827 | // Common case: no conversion required. | |||
9828 | if (LHSType == RHSType) { | |||
9829 | Kind = CK_NoOp; | |||
9830 | return Compatible; | |||
9831 | } | |||
9832 | ||||
9833 | // If the LHS has an __auto_type, there are no additional type constraints | |||
9834 | // to be worried about. | |||
9835 | if (const auto *AT = dyn_cast<AutoType>(LHSType)) { | |||
9836 | if (AT->isGNUAutoType()) { | |||
9837 | Kind = CK_NoOp; | |||
9838 | return Compatible; | |||
9839 | } | |||
9840 | } | |||
9841 | ||||
9842 | // If we have an atomic type, try a non-atomic assignment, then just add an | |||
9843 | // atomic qualification step. | |||
9844 | if (const AtomicType *AtomicTy = dyn_cast<AtomicType>(LHSType)) { | |||
9845 | Sema::AssignConvertType result = | |||
9846 | CheckAssignmentConstraints(AtomicTy->getValueType(), RHS, Kind); | |||
9847 | if (result != Compatible) | |||
9848 | return result; | |||
9849 | if (Kind != CK_NoOp && ConvertRHS) | |||
9850 | RHS = ImpCastExprToType(RHS.get(), AtomicTy->getValueType(), Kind); | |||
9851 | Kind = CK_NonAtomicToAtomic; | |||
9852 | return Compatible; | |||
9853 | } | |||
9854 | ||||
9855 | // If the left-hand side is a reference type, then we are in a | |||
9856 | // (rare!) case where we've allowed the use of references in C, | |||
9857 | // e.g., as a parameter type in a built-in function. In this case, | |||
9858 | // just make sure that the type referenced is compatible with the | |||
9859 | // right-hand side type. The caller is responsible for adjusting | |||
9860 | // LHSType so that the resulting expression does not have reference | |||
9861 | // type. | |||
9862 | if (const ReferenceType *LHSTypeRef = LHSType->getAs<ReferenceType>()) { | |||
9863 | if (Context.typesAreCompatible(LHSTypeRef->getPointeeType(), RHSType)) { | |||
9864 | Kind = CK_LValueBitCast; | |||
9865 | return Compatible; | |||
9866 | } | |||
9867 | return Incompatible; | |||
9868 | } | |||
9869 | ||||
9870 | // Allow scalar to ExtVector assignments, and assignments of an ExtVector type | |||
9871 | // to the same ExtVector type. | |||
9872 | if (LHSType->isExtVectorType()) { | |||
9873 | if (RHSType->isExtVectorType()) | |||
9874 | return Incompatible; | |||
9875 | if (RHSType->isArithmeticType()) { | |||
9876 | // CK_VectorSplat does T -> vector T, so first cast to the element type. | |||
9877 | if (ConvertRHS) | |||
9878 | RHS = prepareVectorSplat(LHSType, RHS.get()); | |||
9879 | Kind = CK_VectorSplat; | |||
9880 | return Compatible; | |||
9881 | } | |||
9882 | } | |||
9883 | ||||
9884 | // Conversions to or from vector type. | |||
9885 | if (LHSType->isVectorType() || RHSType->isVectorType()) { | |||
9886 | if (LHSType->isVectorType() && RHSType->isVectorType()) { | |||
9887 | // Allow assignments of an AltiVec vector type to an equivalent GCC | |||
9888 | // vector type and vice versa | |||
9889 | if (Context.areCompatibleVectorTypes(LHSType, RHSType)) { | |||
9890 | Kind = CK_BitCast; | |||
9891 | return Compatible; | |||
9892 | } | |||
9893 | ||||
9894 | // If we are allowing lax vector conversions, and LHS and RHS are both | |||
9895 | // vectors, the total size only needs to be the same. This is a bitcast; | |||
9896 | // no bits are changed but the result type is different. | |||
9897 | if (isLaxVectorConversion(RHSType, LHSType)) { | |||
9898 | // The default for lax vector conversions with Altivec vectors will | |||
9899 | // change, so if we are converting between vector types where | |||
9900 | // at least one is an Altivec vector, emit a warning. | |||
9901 | if (Context.getTargetInfo().getTriple().isPPC() && | |||
9902 | anyAltivecTypes(RHSType, LHSType) && | |||
9903 | !Context.areCompatibleVectorTypes(RHSType, LHSType)) | |||
9904 | Diag(RHS.get()->getExprLoc(), diag::warn_deprecated_lax_vec_conv_all) | |||
9905 | << RHSType << LHSType; | |||
9906 | Kind = CK_BitCast; | |||
9907 | return IncompatibleVectors; | |||
9908 | } | |||
9909 | } | |||
9910 | ||||
9911 | // When the RHS comes from another lax conversion (e.g. binops between | |||
9912 | // scalars and vectors) the result is canonicalized as a vector. When the | |||
9913 | // LHS is also a vector, the lax is allowed by the condition above. Handle | |||
9914 | // the case where LHS is a scalar. | |||
9915 | if (LHSType->isScalarType()) { | |||
9916 | const VectorType *VecType = RHSType->getAs<VectorType>(); | |||
9917 | if (VecType && VecType->getNumElements() == 1 && | |||
9918 | isLaxVectorConversion(RHSType, LHSType)) { | |||
9919 | if (Context.getTargetInfo().getTriple().isPPC() && | |||
9920 | (VecType->getVectorKind() == VectorType::AltiVecVector || | |||
9921 | VecType->getVectorKind() == VectorType::AltiVecBool || | |||
9922 | VecType->getVectorKind() == VectorType::AltiVecPixel)) | |||
9923 | Diag(RHS.get()->getExprLoc(), diag::warn_deprecated_lax_vec_conv_all) | |||
9924 | << RHSType << LHSType; | |||
9925 | ExprResult *VecExpr = &RHS; | |||
9926 | *VecExpr = ImpCastExprToType(VecExpr->get(), LHSType, CK_BitCast); | |||
9927 | Kind = CK_BitCast; | |||
9928 | return Compatible; | |||
9929 | } | |||
9930 | } | |||
9931 | ||||
9932 | // Allow assignments between fixed-length and sizeless SVE vectors. | |||
9933 | if ((LHSType->isSVESizelessBuiltinType() && RHSType->isVectorType()) || | |||
9934 | (LHSType->isVectorType() && RHSType->isSVESizelessBuiltinType())) | |||
9935 | if (Context.areCompatibleSveTypes(LHSType, RHSType) || | |||
9936 | Context.areLaxCompatibleSveTypes(LHSType, RHSType)) { | |||
9937 | Kind = CK_BitCast; | |||
9938 | return Compatible; | |||
9939 | } | |||
9940 | ||||
9941 | // Allow assignments between fixed-length and sizeless RVV vectors. | |||
9942 | if ((LHSType->isRVVSizelessBuiltinType() && RHSType->isVectorType()) || | |||
9943 | (LHSType->isVectorType() && RHSType->isRVVSizelessBuiltinType())) { | |||
9944 | if (Context.areCompatibleRVVTypes(LHSType, RHSType) || | |||
9945 | Context.areLaxCompatibleRVVTypes(LHSType, RHSType)) { | |||
9946 | Kind = CK_BitCast; | |||
9947 | return Compatible; | |||
9948 | } | |||
9949 | } | |||
9950 | ||||
9951 | return Incompatible; | |||
9952 | } | |||
9953 | ||||
9954 | // Diagnose attempts to convert between __ibm128, __float128 and long double | |||
9955 | // where such conversions currently can't be handled. | |||
9956 | if (unsupportedTypeConversion(*this, LHSType, RHSType)) | |||
9957 | return Incompatible; | |||
9958 | ||||
9959 | // Disallow assigning a _Complex to a real type in C++ mode since it simply | |||
9960 | // discards the imaginary part. | |||
9961 | if (getLangOpts().CPlusPlus && RHSType->getAs<ComplexType>() && | |||
9962 | !LHSType->getAs<ComplexType>()) | |||
9963 | return Incompatible; | |||
9964 | ||||
9965 | // Arithmetic conversions. | |||
9966 | if (LHSType->isArithmeticType() && RHSType->isArithmeticType() && | |||
9967 | !(getLangOpts().CPlusPlus && LHSType->isEnumeralType())) { | |||
9968 | if (ConvertRHS) | |||
9969 | Kind = PrepareScalarCast(RHS, LHSType); | |||
9970 | return Compatible; | |||
9971 | } | |||
9972 | ||||
9973 | // Conversions to normal pointers. | |||
9974 | if (const PointerType *LHSPointer = dyn_cast<PointerType>(LHSType)) { | |||
9975 | // U* -> T* | |||
9976 | if (isa<PointerType>(RHSType)) { | |||
9977 | LangAS AddrSpaceL = LHSPointer->getPointeeType().getAddressSpace(); | |||
9978 | LangAS AddrSpaceR = RHSType->getPointeeType().getAddressSpace(); | |||
9979 | if (AddrSpaceL != AddrSpaceR) | |||
9980 | Kind = CK_AddressSpaceConversion; | |||
9981 | else if (Context.hasCvrSimilarType(RHSType, LHSType)) | |||
9982 | Kind = CK_NoOp; | |||
9983 | else | |||
9984 | Kind = CK_BitCast; | |||
9985 | return checkPointerTypesForAssignment(*this, LHSType, RHSType, | |||
9986 | RHS.get()->getBeginLoc()); | |||
9987 | } | |||
9988 | ||||
9989 | // int -> T* | |||
9990 | if (RHSType->isIntegerType()) { | |||
9991 | Kind = CK_IntegralToPointer; // FIXME: null? | |||
9992 | return IntToPointer; | |||
9993 | } | |||
9994 | ||||
9995 | // C pointers are not compatible with ObjC object pointers, | |||
9996 | // with two exceptions: | |||
9997 | if (isa<ObjCObjectPointerType>(RHSType)) { | |||
9998 | // - conversions to void* | |||
9999 | if (LHSPointer->getPointeeType()->isVoidType()) { | |||
10000 | Kind = CK_BitCast; | |||
10001 | return Compatible; | |||
10002 | } | |||
10003 | ||||
10004 | // - conversions from 'Class' to the redefinition type | |||
10005 | if (RHSType->isObjCClassType() && | |||
10006 | Context.hasSameType(LHSType, | |||
10007 | Context.getObjCClassRedefinitionType())) { | |||
10008 | Kind = CK_BitCast; | |||
10009 | return Compatible; | |||
10010 | } | |||
10011 | ||||
10012 | Kind = CK_BitCast; | |||
10013 | return IncompatiblePointer; | |||
10014 | } | |||
10015 | ||||
10016 | // U^ -> void* | |||
10017 | if (RHSType->getAs<BlockPointerType>()) { | |||
10018 | if (LHSPointer->getPointeeType()->isVoidType()) { | |||
10019 | LangAS AddrSpaceL = LHSPointer->getPointeeType().getAddressSpace(); | |||
10020 | LangAS AddrSpaceR = RHSType->getAs<BlockPointerType>() | |||
10021 | ->getPointeeType() | |||
10022 | .getAddressSpace(); | |||
10023 | Kind = | |||
10024 | AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion : CK_BitCast; | |||
10025 | return Compatible; | |||
10026 | } | |||
10027 | } | |||
10028 | ||||
10029 | return Incompatible; | |||
10030 | } | |||
10031 | ||||
10032 | // Conversions to block pointers. | |||
10033 | if (isa<BlockPointerType>(LHSType)) { | |||
10034 | // U^ -> T^ | |||
10035 | if (RHSType->isBlockPointerType()) { | |||
10036 | LangAS AddrSpaceL = LHSType->getAs<BlockPointerType>() | |||
10037 | ->getPointeeType() | |||
10038 | .getAddressSpace(); | |||
10039 | LangAS AddrSpaceR = RHSType->getAs<BlockPointerType>() | |||
10040 | ->getPointeeType() | |||
10041 | .getAddressSpace(); | |||
10042 | Kind = AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion : CK_BitCast; | |||
10043 | return checkBlockPointerTypesForAssignment(*this, LHSType, RHSType); | |||
10044 | } | |||
10045 | ||||
10046 | // int or null -> T^ | |||
10047 | if (RHSType->isIntegerType()) { | |||
10048 | Kind = CK_IntegralToPointer; // FIXME: null | |||
10049 | return IntToBlockPointer; | |||
10050 | } | |||
10051 | ||||
10052 | // id -> T^ | |||
10053 | if (getLangOpts().ObjC && RHSType->isObjCIdType()) { | |||
10054 | Kind = CK_AnyPointerToBlockPointerCast; | |||
10055 | return Compatible; | |||
10056 | } | |||
10057 | ||||
10058 | // void* -> T^ | |||
10059 | if (const PointerType *RHSPT = RHSType->getAs<PointerType>()) | |||
10060 | if (RHSPT->getPointeeType()->isVoidType()) { | |||
10061 | Kind = CK_AnyPointerToBlockPointerCast; | |||
10062 | return Compatible; | |||
10063 | } | |||
10064 | ||||
10065 | return Incompatible; | |||
10066 | } | |||
10067 | ||||
10068 | // Conversions to Objective-C pointers. | |||
10069 | if (isa<ObjCObjectPointerType>(LHSType)) { | |||
10070 | // A* -> B* | |||
10071 | if (RHSType->isObjCObjectPointerType()) { | |||
10072 | Kind = CK_BitCast; | |||
10073 | Sema::AssignConvertType result = | |||
10074 | checkObjCPointerTypesForAssignment(*this, LHSType, RHSType); | |||
10075 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
10076 | result == Compatible && | |||
10077 | !CheckObjCARCUnavailableWeakConversion(OrigLHSType, RHSType)) | |||
10078 | result = IncompatibleObjCWeakRef; | |||
10079 | return result; | |||
10080 | } | |||
10081 | ||||
10082 | // int or null -> A* | |||
10083 | if (RHSType->isIntegerType()) { | |||
10084 | Kind = CK_IntegralToPointer; // FIXME: null | |||
10085 | return IntToPointer; | |||
10086 | } | |||
10087 | ||||
10088 | // In general, C pointers are not compatible with ObjC object pointers, | |||
10089 | // with two exceptions: | |||
10090 | if (isa<PointerType>(RHSType)) { | |||
10091 | Kind = CK_CPointerToObjCPointerCast; | |||
10092 | ||||
10093 | // - conversions from 'void*' | |||
10094 | if (RHSType->isVoidPointerType()) { | |||
10095 | return Compatible; | |||
10096 | } | |||
10097 | ||||
10098 | // - conversions to 'Class' from its redefinition type | |||
10099 | if (LHSType->isObjCClassType() && | |||
10100 | Context.hasSameType(RHSType, | |||
10101 | Context.getObjCClassRedefinitionType())) { | |||
10102 | return Compatible; | |||
10103 | } | |||
10104 | ||||
10105 | return IncompatiblePointer; | |||
10106 | } | |||
10107 | ||||
10108 | // Only under strict condition T^ is compatible with an Objective-C pointer. | |||
10109 | if (RHSType->isBlockPointerType() && | |||
10110 | LHSType->isBlockCompatibleObjCPointerType(Context)) { | |||
10111 | if (ConvertRHS) | |||
10112 | maybeExtendBlockObject(RHS); | |||
10113 | Kind = CK_BlockPointerToObjCPointerCast; | |||
10114 | return Compatible; | |||
10115 | } | |||
10116 | ||||
10117 | return Incompatible; | |||
10118 | } | |||
10119 | ||||
10120 | // Conversion to nullptr_t (C2x only) | |||
10121 | if (getLangOpts().C2x && LHSType->isNullPtrType() && | |||
10122 | RHS.get()->isNullPointerConstant(Context, | |||
10123 | Expr::NPC_ValueDependentIsNull)) { | |||
10124 | // null -> nullptr_t | |||
10125 | Kind = CK_NullToPointer; | |||
10126 | return Compatible; | |||
10127 | } | |||
10128 | ||||
10129 | // Conversions from pointers that are not covered by the above. | |||
10130 | if (isa<PointerType>(RHSType)) { | |||
10131 | // T* -> _Bool | |||
10132 | if (LHSType == Context.BoolTy) { | |||
10133 | Kind = CK_PointerToBoolean; | |||
10134 | return Compatible; | |||
10135 | } | |||
10136 | ||||
10137 | // T* -> int | |||
10138 | if (LHSType->isIntegerType()) { | |||
10139 | Kind = CK_PointerToIntegral; | |||
10140 | return PointerToInt; | |||
10141 | } | |||
10142 | ||||
10143 | return Incompatible; | |||
10144 | } | |||
10145 | ||||
10146 | // Conversions from Objective-C pointers that are not covered by the above. | |||
10147 | if (isa<ObjCObjectPointerType>(RHSType)) { | |||
10148 | // T* -> _Bool | |||
10149 | if (LHSType == Context.BoolTy) { | |||
10150 | Kind = CK_PointerToBoolean; | |||
10151 | return Compatible; | |||
10152 | } | |||
10153 | ||||
10154 | // T* -> int | |||
10155 | if (LHSType->isIntegerType()) { | |||
10156 | Kind = CK_PointerToIntegral; | |||
10157 | return PointerToInt; | |||
10158 | } | |||
10159 | ||||
10160 | return Incompatible; | |||
10161 | } | |||
10162 | ||||
10163 | // struct A -> struct B | |||
10164 | if (isa<TagType>(LHSType) && isa<TagType>(RHSType)) { | |||
10165 | if (Context.typesAreCompatible(LHSType, RHSType)) { | |||
10166 | Kind = CK_NoOp; | |||
10167 | return Compatible; | |||
10168 | } | |||
10169 | } | |||
10170 | ||||
10171 | if (LHSType->isSamplerT() && RHSType->isIntegerType()) { | |||
10172 | Kind = CK_IntToOCLSampler; | |||
10173 | return Compatible; | |||
10174 | } | |||
10175 | ||||
10176 | return Incompatible; | |||
10177 | } | |||
10178 | ||||
10179 | /// Constructs a transparent union from an expression that is | |||
10180 | /// used to initialize the transparent union. | |||
10181 | static void ConstructTransparentUnion(Sema &S, ASTContext &C, | |||
10182 | ExprResult &EResult, QualType UnionType, | |||
10183 | FieldDecl *Field) { | |||
10184 | // Build an initializer list that designates the appropriate member | |||
10185 | // of the transparent union. | |||
10186 | Expr *E = EResult.get(); | |||
10187 | InitListExpr *Initializer = new (C) InitListExpr(C, SourceLocation(), | |||
10188 | E, SourceLocation()); | |||
10189 | Initializer->setType(UnionType); | |||
10190 | Initializer->setInitializedFieldInUnion(Field); | |||
10191 | ||||
10192 | // Build a compound literal constructing a value of the transparent | |||
10193 | // union type from this initializer list. | |||
10194 | TypeSourceInfo *unionTInfo = C.getTrivialTypeSourceInfo(UnionType); | |||
10195 | EResult = new (C) CompoundLiteralExpr(SourceLocation(), unionTInfo, UnionType, | |||
10196 | VK_PRValue, Initializer, false); | |||
10197 | } | |||
10198 | ||||
10199 | Sema::AssignConvertType | |||
10200 | Sema::CheckTransparentUnionArgumentConstraints(QualType ArgType, | |||
10201 | ExprResult &RHS) { | |||
10202 | QualType RHSType = RHS.get()->getType(); | |||
10203 | ||||
10204 | // If the ArgType is a Union type, we want to handle a potential | |||
10205 | // transparent_union GCC extension. | |||
10206 | const RecordType *UT = ArgType->getAsUnionType(); | |||
10207 | if (!UT || !UT->getDecl()->hasAttr<TransparentUnionAttr>()) | |||
10208 | return Incompatible; | |||
10209 | ||||
10210 | // The field to initialize within the transparent union. | |||
10211 | RecordDecl *UD = UT->getDecl(); | |||
10212 | FieldDecl *InitField = nullptr; | |||
10213 | // It's compatible if the expression matches any of the fields. | |||
10214 | for (auto *it : UD->fields()) { | |||
10215 | if (it->getType()->isPointerType()) { | |||
10216 | // If the transparent union contains a pointer type, we allow: | |||
10217 | // 1) void pointer | |||
10218 | // 2) null pointer constant | |||
10219 | if (RHSType->isPointerType()) | |||
10220 | if (RHSType->castAs<PointerType>()->getPointeeType()->isVoidType()) { | |||
10221 | RHS = ImpCastExprToType(RHS.get(), it->getType(), CK_BitCast); | |||
10222 | InitField = it; | |||
10223 | break; | |||
10224 | } | |||
10225 | ||||
10226 | if (RHS.get()->isNullPointerConstant(Context, | |||
10227 | Expr::NPC_ValueDependentIsNull)) { | |||
10228 | RHS = ImpCastExprToType(RHS.get(), it->getType(), | |||
10229 | CK_NullToPointer); | |||
10230 | InitField = it; | |||
10231 | break; | |||
10232 | } | |||
10233 | } | |||
10234 | ||||
10235 | CastKind Kind; | |||
10236 | if (CheckAssignmentConstraints(it->getType(), RHS, Kind) | |||
10237 | == Compatible) { | |||
10238 | RHS = ImpCastExprToType(RHS.get(), it->getType(), Kind); | |||
10239 | InitField = it; | |||
10240 | break; | |||
10241 | } | |||
10242 | } | |||
10243 | ||||
10244 | if (!InitField) | |||
10245 | return Incompatible; | |||
10246 | ||||
10247 | ConstructTransparentUnion(*this, Context, RHS, ArgType, InitField); | |||
10248 | return Compatible; | |||
10249 | } | |||
10250 | ||||
10251 | Sema::AssignConvertType | |||
10252 | Sema::CheckSingleAssignmentConstraints(QualType LHSType, ExprResult &CallerRHS, | |||
10253 | bool Diagnose, | |||
10254 | bool DiagnoseCFAudited, | |||
10255 | bool ConvertRHS) { | |||
10256 | // We need to be able to tell the caller whether we diagnosed a problem, if | |||
10257 | // they ask us to issue diagnostics. | |||
10258 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 10258, __extension__ __PRETTY_FUNCTION__ )); | |||
10259 | ||||
10260 | // If ConvertRHS is false, we want to leave the caller's RHS untouched. Sadly, | |||
10261 | // we can't avoid *all* modifications at the moment, so we need some somewhere | |||
10262 | // to put the updated value. | |||
10263 | ExprResult LocalRHS = CallerRHS; | |||
10264 | ExprResult &RHS = ConvertRHS ? CallerRHS : LocalRHS; | |||
10265 | ||||
10266 | if (const auto *LHSPtrType = LHSType->getAs<PointerType>()) { | |||
10267 | if (const auto *RHSPtrType = RHS.get()->getType()->getAs<PointerType>()) { | |||
10268 | if (RHSPtrType->getPointeeType()->hasAttr(attr::NoDeref) && | |||
10269 | !LHSPtrType->getPointeeType()->hasAttr(attr::NoDeref)) { | |||
10270 | Diag(RHS.get()->getExprLoc(), | |||
10271 | diag::warn_noderef_to_dereferenceable_pointer) | |||
10272 | << RHS.get()->getSourceRange(); | |||
10273 | } | |||
10274 | } | |||
10275 | } | |||
10276 | ||||
10277 | if (getLangOpts().CPlusPlus) { | |||
10278 | if (!LHSType->isRecordType() && !LHSType->isAtomicType()) { | |||
10279 | // C++ 5.17p3: If the left operand is not of class type, the | |||
10280 | // expression is implicitly converted (C++ 4) to the | |||
10281 | // cv-unqualified type of the left operand. | |||
10282 | QualType RHSType = RHS.get()->getType(); | |||
10283 | if (Diagnose) { | |||
10284 | RHS = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
10285 | AA_Assigning); | |||
10286 | } else { | |||
10287 | ImplicitConversionSequence ICS = | |||
10288 | TryImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
10289 | /*SuppressUserConversions=*/false, | |||
10290 | AllowedExplicit::None, | |||
10291 | /*InOverloadResolution=*/false, | |||
10292 | /*CStyle=*/false, | |||
10293 | /*AllowObjCWritebackConversion=*/false); | |||
10294 | if (ICS.isFailure()) | |||
10295 | return Incompatible; | |||
10296 | RHS = PerformImplicitConversion(RHS.get(), LHSType.getUnqualifiedType(), | |||
10297 | ICS, AA_Assigning); | |||
10298 | } | |||
10299 | if (RHS.isInvalid()) | |||
10300 | return Incompatible; | |||
10301 | Sema::AssignConvertType result = Compatible; | |||
10302 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
10303 | !CheckObjCARCUnavailableWeakConversion(LHSType, RHSType)) | |||
10304 | result = IncompatibleObjCWeakRef; | |||
10305 | return result; | |||
10306 | } | |||
10307 | ||||
10308 | // FIXME: Currently, we fall through and treat C++ classes like C | |||
10309 | // structures. | |||
10310 | // FIXME: We also fall through for atomics; not sure what should | |||
10311 | // happen there, though. | |||
10312 | } else if (RHS.get()->getType() == Context.OverloadTy) { | |||
10313 | // As a set of extensions to C, we support overloading on functions. These | |||
10314 | // functions need to be resolved here. | |||
10315 | DeclAccessPair DAP; | |||
10316 | if (FunctionDecl *FD = ResolveAddressOfOverloadedFunction( | |||
10317 | RHS.get(), LHSType, /*Complain=*/false, DAP)) | |||
10318 | RHS = FixOverloadedFunctionReference(RHS.get(), DAP, FD); | |||
10319 | else | |||
10320 | return Incompatible; | |||
10321 | } | |||
10322 | ||||
10323 | // This check seems unnatural, however it is necessary to ensure the proper | |||
10324 | // conversion of functions/arrays. If the conversion were done for all | |||
10325 | // DeclExpr's (created by ActOnIdExpression), it would mess up the unary | |||
10326 | // expressions that suppress this implicit conversion (&, sizeof). This needs | |||
10327 | // to happen before we check for null pointer conversions because C does not | |||
10328 | // undergo the same implicit conversions as C++ does above (by the calls to | |||
10329 | // TryImplicitConversion() and PerformImplicitConversion()) which insert the | |||
10330 | // lvalue to rvalue cast before checking for null pointer constraints. This | |||
10331 | // addresses code like: nullptr_t val; int *ptr; ptr = val; | |||
10332 | // | |||
10333 | // Suppress this for references: C++ 8.5.3p5. | |||
10334 | if (!LHSType->isReferenceType()) { | |||
10335 | // FIXME: We potentially allocate here even if ConvertRHS is false. | |||
10336 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get(), Diagnose); | |||
10337 | if (RHS.isInvalid()) | |||
10338 | return Incompatible; | |||
10339 | } | |||
10340 | ||||
10341 | // The constraints are expressed in terms of the atomic, qualified, or | |||
10342 | // unqualified type of the LHS. | |||
10343 | QualType LHSTypeAfterConversion = LHSType.getAtomicUnqualifiedType(); | |||
10344 | ||||
10345 | // C99 6.5.16.1p1: the left operand is a pointer and the right is | |||
10346 | // a null pointer constant <C2x>or its type is nullptr_t;</C2x>. | |||
10347 | if ((LHSTypeAfterConversion->isPointerType() || | |||
10348 | LHSTypeAfterConversion->isObjCObjectPointerType() || | |||
10349 | LHSTypeAfterConversion->isBlockPointerType()) && | |||
10350 | ((getLangOpts().C2x && RHS.get()->getType()->isNullPtrType()) || | |||
10351 | RHS.get()->isNullPointerConstant(Context, | |||
10352 | Expr::NPC_ValueDependentIsNull))) { | |||
10353 | if (Diagnose || ConvertRHS) { | |||
10354 | CastKind Kind; | |||
10355 | CXXCastPath Path; | |||
10356 | CheckPointerConversion(RHS.get(), LHSType, Kind, Path, | |||
10357 | /*IgnoreBaseAccess=*/false, Diagnose); | |||
10358 | if (ConvertRHS) | |||
10359 | RHS = ImpCastExprToType(RHS.get(), LHSType, Kind, VK_PRValue, &Path); | |||
10360 | } | |||
10361 | return Compatible; | |||
10362 | } | |||
10363 | // C2x 6.5.16.1p1: the left operand has type atomic, qualified, or | |||
10364 | // unqualified bool, and the right operand is a pointer or its type is | |||
10365 | // nullptr_t. | |||
10366 | if (getLangOpts().C2x && LHSType->isBooleanType() && | |||
10367 | RHS.get()->getType()->isNullPtrType()) { | |||
10368 | // NB: T* -> _Bool is handled in CheckAssignmentConstraints, this only | |||
10369 | // only handles nullptr -> _Bool due to needing an extra conversion | |||
10370 | // step. | |||
10371 | // We model this by converting from nullptr -> void * and then let the | |||
10372 | // conversion from void * -> _Bool happen naturally. | |||
10373 | if (Diagnose || ConvertRHS) { | |||
10374 | CastKind Kind; | |||
10375 | CXXCastPath Path; | |||
10376 | CheckPointerConversion(RHS.get(), Context.VoidPtrTy, Kind, Path, | |||
10377 | /*IgnoreBaseAccess=*/false, Diagnose); | |||
10378 | if (ConvertRHS) | |||
10379 | RHS = ImpCastExprToType(RHS.get(), Context.VoidPtrTy, Kind, VK_PRValue, | |||
10380 | &Path); | |||
10381 | } | |||
10382 | } | |||
10383 | ||||
10384 | // OpenCL queue_t type assignment. | |||
10385 | if (LHSType->isQueueT() && RHS.get()->isNullPointerConstant( | |||
10386 | Context, Expr::NPC_ValueDependentIsNull)) { | |||
10387 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
10388 | return Compatible; | |||
10389 | } | |||
10390 | ||||
10391 | CastKind Kind; | |||
10392 | Sema::AssignConvertType result = | |||
10393 | CheckAssignmentConstraints(LHSType, RHS, Kind, ConvertRHS); | |||
10394 | ||||
10395 | // C99 6.5.16.1p2: The value of the right operand is converted to the | |||
10396 | // type of the assignment expression. | |||
10397 | // CheckAssignmentConstraints allows the left-hand side to be a reference, | |||
10398 | // so that we can use references in built-in functions even in C. | |||
10399 | // The getNonReferenceType() call makes sure that the resulting expression | |||
10400 | // does not have reference type. | |||
10401 | if (result != Incompatible && RHS.get()->getType() != LHSType) { | |||
10402 | QualType Ty = LHSType.getNonLValueExprType(Context); | |||
10403 | Expr *E = RHS.get(); | |||
10404 | ||||
10405 | // Check for various Objective-C errors. If we are not reporting | |||
10406 | // diagnostics and just checking for errors, e.g., during overload | |||
10407 | // resolution, return Incompatible to indicate the failure. | |||
10408 | if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | |||
10409 | CheckObjCConversion(SourceRange(), Ty, E, CCK_ImplicitConversion, | |||
10410 | Diagnose, DiagnoseCFAudited) != ACR_okay) { | |||
10411 | if (!Diagnose) | |||
10412 | return Incompatible; | |||
10413 | } | |||
10414 | if (getLangOpts().ObjC && | |||
10415 | (CheckObjCBridgeRelatedConversions(E->getBeginLoc(), LHSType, | |||
10416 | E->getType(), E, Diagnose) || | |||
10417 | CheckConversionToObjCLiteral(LHSType, E, Diagnose))) { | |||
10418 | if (!Diagnose) | |||
10419 | return Incompatible; | |||
10420 | // Replace the expression with a corrected version and continue so we | |||
10421 | // can find further errors. | |||
10422 | RHS = E; | |||
10423 | return Compatible; | |||
10424 | } | |||
10425 | ||||
10426 | if (ConvertRHS) | |||
10427 | RHS = ImpCastExprToType(E, Ty, Kind); | |||
10428 | } | |||
10429 | ||||
10430 | return result; | |||
10431 | } | |||
10432 | ||||
10433 | namespace { | |||
10434 | /// The original operand to an operator, prior to the application of the usual | |||
10435 | /// arithmetic conversions and converting the arguments of a builtin operator | |||
10436 | /// candidate. | |||
10437 | struct OriginalOperand { | |||
10438 | explicit OriginalOperand(Expr *Op) : Orig(Op), Conversion(nullptr) { | |||
10439 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(Op)) | |||
10440 | Op = MTE->getSubExpr(); | |||
10441 | if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(Op)) | |||
10442 | Op = BTE->getSubExpr(); | |||
10443 | if (auto *ICE = dyn_cast<ImplicitCastExpr>(Op)) { | |||
10444 | Orig = ICE->getSubExprAsWritten(); | |||
10445 | Conversion = ICE->getConversionFunction(); | |||
10446 | } | |||
10447 | } | |||
10448 | ||||
10449 | QualType getType() const { return Orig->getType(); } | |||
10450 | ||||
10451 | Expr *Orig; | |||
10452 | NamedDecl *Conversion; | |||
10453 | }; | |||
10454 | } | |||
10455 | ||||
10456 | QualType Sema::InvalidOperands(SourceLocation Loc, ExprResult &LHS, | |||
10457 | ExprResult &RHS) { | |||
10458 | OriginalOperand OrigLHS(LHS.get()), OrigRHS(RHS.get()); | |||
10459 | ||||
10460 | Diag(Loc, diag::err_typecheck_invalid_operands) | |||
10461 | << OrigLHS.getType() << OrigRHS.getType() | |||
10462 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10463 | ||||
10464 | // If a user-defined conversion was applied to either of the operands prior | |||
10465 | // to applying the built-in operator rules, tell the user about it. | |||
10466 | if (OrigLHS.Conversion) { | |||
10467 | Diag(OrigLHS.Conversion->getLocation(), | |||
10468 | diag::note_typecheck_invalid_operands_converted) | |||
10469 | << 0 << LHS.get()->getType(); | |||
10470 | } | |||
10471 | if (OrigRHS.Conversion) { | |||
10472 | Diag(OrigRHS.Conversion->getLocation(), | |||
10473 | diag::note_typecheck_invalid_operands_converted) | |||
10474 | << 1 << RHS.get()->getType(); | |||
10475 | } | |||
10476 | ||||
10477 | return QualType(); | |||
10478 | } | |||
10479 | ||||
10480 | // Diagnose cases where a scalar was implicitly converted to a vector and | |||
10481 | // diagnose the underlying types. Otherwise, diagnose the error | |||
10482 | // as invalid vector logical operands for non-C++ cases. | |||
10483 | QualType Sema::InvalidLogicalVectorOperands(SourceLocation Loc, ExprResult &LHS, | |||
10484 | ExprResult &RHS) { | |||
10485 | QualType LHSType = LHS.get()->IgnoreImpCasts()->getType(); | |||
10486 | QualType RHSType = RHS.get()->IgnoreImpCasts()->getType(); | |||
10487 | ||||
10488 | bool LHSNatVec = LHSType->isVectorType(); | |||
10489 | bool RHSNatVec = RHSType->isVectorType(); | |||
10490 | ||||
10491 | if (!(LHSNatVec && RHSNatVec)) { | |||
10492 | Expr *Vector = LHSNatVec ? LHS.get() : RHS.get(); | |||
10493 | Expr *NonVector = !LHSNatVec ? LHS.get() : RHS.get(); | |||
10494 | Diag(Loc, diag::err_typecheck_logical_vector_expr_gnu_cpp_restrict) | |||
10495 | << 0 << Vector->getType() << NonVector->IgnoreImpCasts()->getType() | |||
10496 | << Vector->getSourceRange(); | |||
10497 | return QualType(); | |||
10498 | } | |||
10499 | ||||
10500 | Diag(Loc, diag::err_typecheck_logical_vector_expr_gnu_cpp_restrict) | |||
10501 | << 1 << LHSType << RHSType << LHS.get()->getSourceRange() | |||
10502 | << RHS.get()->getSourceRange(); | |||
10503 | ||||
10504 | return QualType(); | |||
10505 | } | |||
10506 | ||||
10507 | /// Try to convert a value of non-vector type to a vector type by converting | |||
10508 | /// the type to the element type of the vector and then performing a splat. | |||
10509 | /// If the language is OpenCL, we only use conversions that promote scalar | |||
10510 | /// rank; for C, Obj-C, and C++ we allow any real scalar conversion except | |||
10511 | /// for float->int. | |||
10512 | /// | |||
10513 | /// OpenCL V2.0 6.2.6.p2: | |||
10514 | /// An error shall occur if any scalar operand type has greater rank | |||
10515 | /// than the type of the vector element. | |||
10516 | /// | |||
10517 | /// \param scalar - if non-null, actually perform the conversions | |||
10518 | /// \return true if the operation fails (but without diagnosing the failure) | |||
10519 | static bool tryVectorConvertAndSplat(Sema &S, ExprResult *scalar, | |||
10520 | QualType scalarTy, | |||
10521 | QualType vectorEltTy, | |||
10522 | QualType vectorTy, | |||
10523 | unsigned &DiagID) { | |||
10524 | // The conversion to apply to the scalar before splatting it, | |||
10525 | // if necessary. | |||
10526 | CastKind scalarCast = CK_NoOp; | |||
10527 | ||||
10528 | if (vectorEltTy->isIntegralType(S.Context)) { | |||
10529 | if (S.getLangOpts().OpenCL && (scalarTy->isRealFloatingType() || | |||
10530 | (scalarTy->isIntegerType() && | |||
10531 | S.Context.getIntegerTypeOrder(vectorEltTy, scalarTy) < 0))) { | |||
10532 | DiagID = diag::err_opencl_scalar_type_rank_greater_than_vector_type; | |||
10533 | return true; | |||
10534 | } | |||
10535 | if (!scalarTy->isIntegralType(S.Context)) | |||
10536 | return true; | |||
10537 | scalarCast = CK_IntegralCast; | |||
10538 | } else if (vectorEltTy->isRealFloatingType()) { | |||
10539 | if (scalarTy->isRealFloatingType()) { | |||
10540 | if (S.getLangOpts().OpenCL && | |||
10541 | S.Context.getFloatingTypeOrder(vectorEltTy, scalarTy) < 0) { | |||
10542 | DiagID = diag::err_opencl_scalar_type_rank_greater_than_vector_type; | |||
10543 | return true; | |||
10544 | } | |||
10545 | scalarCast = CK_FloatingCast; | |||
10546 | } | |||
10547 | else if (scalarTy->isIntegralType(S.Context)) | |||
10548 | scalarCast = CK_IntegralToFloating; | |||
10549 | else | |||
10550 | return true; | |||
10551 | } else { | |||
10552 | return true; | |||
10553 | } | |||
10554 | ||||
10555 | // Adjust scalar if desired. | |||
10556 | if (scalar) { | |||
10557 | if (scalarCast != CK_NoOp) | |||
10558 | *scalar = S.ImpCastExprToType(scalar->get(), vectorEltTy, scalarCast); | |||
10559 | *scalar = S.ImpCastExprToType(scalar->get(), vectorTy, CK_VectorSplat); | |||
10560 | } | |||
10561 | return false; | |||
10562 | } | |||
10563 | ||||
10564 | /// Convert vector E to a vector with the same number of elements but different | |||
10565 | /// element type. | |||
10566 | static ExprResult convertVector(Expr *E, QualType ElementType, Sema &S) { | |||
10567 | const auto *VecTy = E->getType()->getAs<VectorType>(); | |||
10568 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 10568, __extension__ __PRETTY_FUNCTION__ )); | |||
10569 | QualType NewVecTy = | |||
10570 | VecTy->isExtVectorType() | |||
10571 | ? S.Context.getExtVectorType(ElementType, VecTy->getNumElements()) | |||
10572 | : S.Context.getVectorType(ElementType, VecTy->getNumElements(), | |||
10573 | VecTy->getVectorKind()); | |||
10574 | ||||
10575 | // Look through the implicit cast. Return the subexpression if its type is | |||
10576 | // NewVecTy. | |||
10577 | if (auto *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
10578 | if (ICE->getSubExpr()->getType() == NewVecTy) | |||
10579 | return ICE->getSubExpr(); | |||
10580 | ||||
10581 | auto Cast = ElementType->isIntegerType() ? CK_IntegralCast : CK_FloatingCast; | |||
10582 | return S.ImpCastExprToType(E, NewVecTy, Cast); | |||
10583 | } | |||
10584 | ||||
10585 | /// Test if a (constant) integer Int can be casted to another integer type | |||
10586 | /// IntTy without losing precision. | |||
10587 | static bool canConvertIntToOtherIntTy(Sema &S, ExprResult *Int, | |||
10588 | QualType OtherIntTy) { | |||
10589 | QualType IntTy = Int->get()->getType().getUnqualifiedType(); | |||
10590 | ||||
10591 | // Reject cases where the value of the Int is unknown as that would | |||
10592 | // possibly cause truncation, but accept cases where the scalar can be | |||
10593 | // demoted without loss of precision. | |||
10594 | Expr::EvalResult EVResult; | |||
10595 | bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context); | |||
10596 | int Order = S.Context.getIntegerTypeOrder(OtherIntTy, IntTy); | |||
10597 | bool IntSigned = IntTy->hasSignedIntegerRepresentation(); | |||
10598 | bool OtherIntSigned = OtherIntTy->hasSignedIntegerRepresentation(); | |||
10599 | ||||
10600 | if (CstInt) { | |||
10601 | // If the scalar is constant and is of a higher order and has more active | |||
10602 | // bits that the vector element type, reject it. | |||
10603 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
10604 | unsigned NumBits = IntSigned | |||
10605 | ? (Result.isNegative() ? Result.getSignificantBits() | |||
10606 | : Result.getActiveBits()) | |||
10607 | : Result.getActiveBits(); | |||
10608 | if (Order < 0 && S.Context.getIntWidth(OtherIntTy) < NumBits) | |||
10609 | return true; | |||
10610 | ||||
10611 | // If the signedness of the scalar type and the vector element type | |||
10612 | // differs and the number of bits is greater than that of the vector | |||
10613 | // element reject it. | |||
10614 | return (IntSigned != OtherIntSigned && | |||
10615 | NumBits > S.Context.getIntWidth(OtherIntTy)); | |||
10616 | } | |||
10617 | ||||
10618 | // Reject cases where the value of the scalar is not constant and it's | |||
10619 | // order is greater than that of the vector element type. | |||
10620 | return (Order < 0); | |||
10621 | } | |||
10622 | ||||
10623 | /// Test if a (constant) integer Int can be casted to floating point type | |||
10624 | /// FloatTy without losing precision. | |||
10625 | static bool canConvertIntTyToFloatTy(Sema &S, ExprResult *Int, | |||
10626 | QualType FloatTy) { | |||
10627 | QualType IntTy = Int->get()->getType().getUnqualifiedType(); | |||
10628 | ||||
10629 | // Determine if the integer constant can be expressed as a floating point | |||
10630 | // number of the appropriate type. | |||
10631 | Expr::EvalResult EVResult; | |||
10632 | bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context); | |||
10633 | ||||
10634 | uint64_t Bits = 0; | |||
10635 | if (CstInt) { | |||
10636 | // Reject constants that would be truncated if they were converted to | |||
10637 | // the floating point type. Test by simple to/from conversion. | |||
10638 | // FIXME: Ideally the conversion to an APFloat and from an APFloat | |||
10639 | // could be avoided if there was a convertFromAPInt method | |||
10640 | // which could signal back if implicit truncation occurred. | |||
10641 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
10642 | llvm::APFloat Float(S.Context.getFloatTypeSemantics(FloatTy)); | |||
10643 | Float.convertFromAPInt(Result, IntTy->hasSignedIntegerRepresentation(), | |||
10644 | llvm::APFloat::rmTowardZero); | |||
10645 | llvm::APSInt ConvertBack(S.Context.getIntWidth(IntTy), | |||
10646 | !IntTy->hasSignedIntegerRepresentation()); | |||
10647 | bool Ignored = false; | |||
10648 | Float.convertToInteger(ConvertBack, llvm::APFloat::rmNearestTiesToEven, | |||
10649 | &Ignored); | |||
10650 | if (Result != ConvertBack) | |||
10651 | return true; | |||
10652 | } else { | |||
10653 | // Reject types that cannot be fully encoded into the mantissa of | |||
10654 | // the float. | |||
10655 | Bits = S.Context.getTypeSize(IntTy); | |||
10656 | unsigned FloatPrec = llvm::APFloat::semanticsPrecision( | |||
10657 | S.Context.getFloatTypeSemantics(FloatTy)); | |||
10658 | if (Bits > FloatPrec) | |||
10659 | return true; | |||
10660 | } | |||
10661 | ||||
10662 | return false; | |||
10663 | } | |||
10664 | ||||
10665 | /// Attempt to convert and splat Scalar into a vector whose types matches | |||
10666 | /// Vector following GCC conversion rules. The rule is that implicit | |||
10667 | /// conversion can occur when Scalar can be casted to match Vector's element | |||
10668 | /// type without causing truncation of Scalar. | |||
10669 | static bool tryGCCVectorConvertAndSplat(Sema &S, ExprResult *Scalar, | |||
10670 | ExprResult *Vector) { | |||
10671 | QualType ScalarTy = Scalar->get()->getType().getUnqualifiedType(); | |||
10672 | QualType VectorTy = Vector->get()->getType().getUnqualifiedType(); | |||
10673 | QualType VectorEltTy; | |||
10674 | ||||
10675 | if (const auto *VT = VectorTy->getAs<VectorType>()) { | |||
10676 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 10677, __extension__ __PRETTY_FUNCTION__ )) | |||
10677 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 10677, __extension__ __PRETTY_FUNCTION__ )); | |||
10678 | VectorEltTy = VT->getElementType(); | |||
10679 | } else if (VectorTy->isVLSTBuiltinType()) { | |||
10680 | VectorEltTy = | |||
10681 | VectorTy->castAs<BuiltinType>()->getSveEltType(S.getASTContext()); | |||
10682 | } else { | |||
10683 | llvm_unreachable("Only Fixed-Length and SVE Vector types are handled here")::llvm::llvm_unreachable_internal("Only Fixed-Length and SVE Vector types are handled here" , "clang/lib/Sema/SemaExpr.cpp", 10683); | |||
10684 | } | |||
10685 | ||||
10686 | // Reject cases where the vector element type or the scalar element type are | |||
10687 | // not integral or floating point types. | |||
10688 | if (!VectorEltTy->isArithmeticType() || !ScalarTy->isArithmeticType()) | |||
10689 | return true; | |||
10690 | ||||
10691 | // The conversion to apply to the scalar before splatting it, | |||
10692 | // if necessary. | |||
10693 | CastKind ScalarCast = CK_NoOp; | |||
10694 | ||||
10695 | // Accept cases where the vector elements are integers and the scalar is | |||
10696 | // an integer. | |||
10697 | // FIXME: Notionally if the scalar was a floating point value with a precise | |||
10698 | // integral representation, we could cast it to an appropriate integer | |||
10699 | // type and then perform the rest of the checks here. GCC will perform | |||
10700 | // this conversion in some cases as determined by the input language. | |||
10701 | // We should accept it on a language independent basis. | |||
10702 | if (VectorEltTy->isIntegralType(S.Context) && | |||
10703 | ScalarTy->isIntegralType(S.Context) && | |||
10704 | S.Context.getIntegerTypeOrder(VectorEltTy, ScalarTy)) { | |||
10705 | ||||
10706 | if (canConvertIntToOtherIntTy(S, Scalar, VectorEltTy)) | |||
10707 | return true; | |||
10708 | ||||
10709 | ScalarCast = CK_IntegralCast; | |||
10710 | } else if (VectorEltTy->isIntegralType(S.Context) && | |||
10711 | ScalarTy->isRealFloatingType()) { | |||
10712 | if (S.Context.getTypeSize(VectorEltTy) == S.Context.getTypeSize(ScalarTy)) | |||
10713 | ScalarCast = CK_FloatingToIntegral; | |||
10714 | else | |||
10715 | return true; | |||
10716 | } else if (VectorEltTy->isRealFloatingType()) { | |||
10717 | if (ScalarTy->isRealFloatingType()) { | |||
10718 | ||||
10719 | // Reject cases where the scalar type is not a constant and has a higher | |||
10720 | // Order than the vector element type. | |||
10721 | llvm::APFloat Result(0.0); | |||
10722 | ||||
10723 | // Determine whether this is a constant scalar. In the event that the | |||
10724 | // value is dependent (and thus cannot be evaluated by the constant | |||
10725 | // evaluator), skip the evaluation. This will then diagnose once the | |||
10726 | // expression is instantiated. | |||
10727 | bool CstScalar = Scalar->get()->isValueDependent() || | |||
10728 | Scalar->get()->EvaluateAsFloat(Result, S.Context); | |||
10729 | int Order = S.Context.getFloatingTypeOrder(VectorEltTy, ScalarTy); | |||
10730 | if (!CstScalar && Order < 0) | |||
10731 | return true; | |||
10732 | ||||
10733 | // If the scalar cannot be safely casted to the vector element type, | |||
10734 | // reject it. | |||
10735 | if (CstScalar) { | |||
10736 | bool Truncated = false; | |||
10737 | Result.convert(S.Context.getFloatTypeSemantics(VectorEltTy), | |||
10738 | llvm::APFloat::rmNearestTiesToEven, &Truncated); | |||
10739 | if (Truncated) | |||
10740 | return true; | |||
10741 | } | |||
10742 | ||||
10743 | ScalarCast = CK_FloatingCast; | |||
10744 | } else if (ScalarTy->isIntegralType(S.Context)) { | |||
10745 | if (canConvertIntTyToFloatTy(S, Scalar, VectorEltTy)) | |||
10746 | return true; | |||
10747 | ||||
10748 | ScalarCast = CK_IntegralToFloating; | |||
10749 | } else | |||
10750 | return true; | |||
10751 | } else if (ScalarTy->isEnumeralType()) | |||
10752 | return true; | |||
10753 | ||||
10754 | // Adjust scalar if desired. | |||
10755 | if (Scalar) { | |||
10756 | if (ScalarCast != CK_NoOp) | |||
10757 | *Scalar = S.ImpCastExprToType(Scalar->get(), VectorEltTy, ScalarCast); | |||
10758 | *Scalar = S.ImpCastExprToType(Scalar->get(), VectorTy, CK_VectorSplat); | |||
10759 | } | |||
10760 | return false; | |||
10761 | } | |||
10762 | ||||
10763 | QualType Sema::CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, | |||
10764 | SourceLocation Loc, bool IsCompAssign, | |||
10765 | bool AllowBothBool, | |||
10766 | bool AllowBoolConversions, | |||
10767 | bool AllowBoolOperation, | |||
10768 | bool ReportInvalid) { | |||
10769 | if (!IsCompAssign) { | |||
10770 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
10771 | if (LHS.isInvalid()) | |||
10772 | return QualType(); | |||
10773 | } | |||
10774 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
10775 | if (RHS.isInvalid()) | |||
10776 | return QualType(); | |||
10777 | ||||
10778 | // For conversion purposes, we ignore any qualifiers. | |||
10779 | // For example, "const float" and "float" are equivalent. | |||
10780 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
10781 | QualType RHSType = RHS.get()->getType().getUnqualifiedType(); | |||
10782 | ||||
10783 | const VectorType *LHSVecType = LHSType->getAs<VectorType>(); | |||
10784 | const VectorType *RHSVecType = RHSType->getAs<VectorType>(); | |||
10785 | assert(LHSVecType || RHSVecType)(static_cast <bool> (LHSVecType || RHSVecType) ? void ( 0) : __assert_fail ("LHSVecType || RHSVecType", "clang/lib/Sema/SemaExpr.cpp" , 10785, __extension__ __PRETTY_FUNCTION__)); | |||
10786 | ||||
10787 | if ((LHSVecType && LHSVecType->getElementType()->isBFloat16Type()) || | |||
10788 | (RHSVecType && RHSVecType->getElementType()->isBFloat16Type())) | |||
10789 | return ReportInvalid ? InvalidOperands(Loc, LHS, RHS) : QualType(); | |||
10790 | ||||
10791 | // AltiVec-style "vector bool op vector bool" combinations are allowed | |||
10792 | // for some operators but not others. | |||
10793 | if (!AllowBothBool && | |||
10794 | LHSVecType && LHSVecType->getVectorKind() == VectorType::AltiVecBool && | |||
10795 | RHSVecType && RHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
10796 | return ReportInvalid ? InvalidOperands(Loc, LHS, RHS) : QualType(); | |||
10797 | ||||
10798 | // This operation may not be performed on boolean vectors. | |||
10799 | if (!AllowBoolOperation && | |||
10800 | (LHSType->isExtVectorBoolType() || RHSType->isExtVectorBoolType())) | |||
10801 | return ReportInvalid ? InvalidOperands(Loc, LHS, RHS) : QualType(); | |||
10802 | ||||
10803 | // If the vector types are identical, return. | |||
10804 | if (Context.hasSameType(LHSType, RHSType)) | |||
10805 | return Context.getCommonSugaredType(LHSType, RHSType); | |||
10806 | ||||
10807 | // If we have compatible AltiVec and GCC vector types, use the AltiVec type. | |||
10808 | if (LHSVecType && RHSVecType && | |||
10809 | Context.areCompatibleVectorTypes(LHSType, RHSType)) { | |||
10810 | if (isa<ExtVectorType>(LHSVecType)) { | |||
10811 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
10812 | return LHSType; | |||
10813 | } | |||
10814 | ||||
10815 | if (!IsCompAssign) | |||
10816 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
10817 | return RHSType; | |||
10818 | } | |||
10819 | ||||
10820 | // AllowBoolConversions says that bool and non-bool AltiVec vectors | |||
10821 | // can be mixed, with the result being the non-bool type. The non-bool | |||
10822 | // operand must have integer element type. | |||
10823 | if (AllowBoolConversions && LHSVecType && RHSVecType && | |||
10824 | LHSVecType->getNumElements() == RHSVecType->getNumElements() && | |||
10825 | (Context.getTypeSize(LHSVecType->getElementType()) == | |||
10826 | Context.getTypeSize(RHSVecType->getElementType()))) { | |||
10827 | if (LHSVecType->getVectorKind() == VectorType::AltiVecVector && | |||
10828 | LHSVecType->getElementType()->isIntegerType() && | |||
10829 | RHSVecType->getVectorKind() == VectorType::AltiVecBool) { | |||
10830 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
10831 | return LHSType; | |||
10832 | } | |||
10833 | if (!IsCompAssign && | |||
10834 | LHSVecType->getVectorKind() == VectorType::AltiVecBool && | |||
10835 | RHSVecType->getVectorKind() == VectorType::AltiVecVector && | |||
10836 | RHSVecType->getElementType()->isIntegerType()) { | |||
10837 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
10838 | return RHSType; | |||
10839 | } | |||
10840 | } | |||
10841 | ||||
10842 | // Expressions containing fixed-length and sizeless SVE/RVV vectors are | |||
10843 | // invalid since the ambiguity can affect the ABI. | |||
10844 | auto IsSveRVVConversion = [](QualType FirstType, QualType SecondType, | |||
10845 | unsigned &SVEorRVV) { | |||
10846 | const VectorType *VecType = SecondType->getAs<VectorType>(); | |||
10847 | SVEorRVV = 0; | |||
10848 | if (FirstType->isSizelessBuiltinType() && VecType) { | |||
10849 | if (VecType->getVectorKind() == VectorType::SveFixedLengthDataVector || | |||
10850 | VecType->getVectorKind() == VectorType::SveFixedLengthPredicateVector) | |||
10851 | return true; | |||
10852 | if (VecType->getVectorKind() == VectorType::RVVFixedLengthDataVector) { | |||
10853 | SVEorRVV = 1; | |||
10854 | return true; | |||
10855 | } | |||
10856 | } | |||
10857 | ||||
10858 | return false; | |||
10859 | }; | |||
10860 | ||||
10861 | unsigned SVEorRVV; | |||
10862 | if (IsSveRVVConversion(LHSType, RHSType, SVEorRVV) || | |||
10863 | IsSveRVVConversion(RHSType, LHSType, SVEorRVV)) { | |||
10864 | Diag(Loc, diag::err_typecheck_sve_rvv_ambiguous) | |||
10865 | << SVEorRVV << LHSType << RHSType; | |||
10866 | return QualType(); | |||
10867 | } | |||
10868 | ||||
10869 | // Expressions containing GNU and SVE or RVV (fixed or sizeless) vectors are | |||
10870 | // invalid since the ambiguity can affect the ABI. | |||
10871 | auto IsSveRVVGnuConversion = [](QualType FirstType, QualType SecondType, | |||
10872 | unsigned &SVEorRVV) { | |||
10873 | const VectorType *FirstVecType = FirstType->getAs<VectorType>(); | |||
10874 | const VectorType *SecondVecType = SecondType->getAs<VectorType>(); | |||
10875 | ||||
10876 | SVEorRVV = 0; | |||
10877 | if (FirstVecType && SecondVecType) { | |||
10878 | if (FirstVecType->getVectorKind() == VectorType::GenericVector) { | |||
10879 | if (SecondVecType->getVectorKind() == | |||
10880 | VectorType::SveFixedLengthDataVector || | |||
10881 | SecondVecType->getVectorKind() == | |||
10882 | VectorType::SveFixedLengthPredicateVector) | |||
10883 | return true; | |||
10884 | if (SecondVecType->getVectorKind() == | |||
10885 | VectorType::RVVFixedLengthDataVector) { | |||
10886 | SVEorRVV = 1; | |||
10887 | return true; | |||
10888 | } | |||
10889 | } | |||
10890 | return false; | |||
10891 | } | |||
10892 | ||||
10893 | if (SecondVecType && | |||
10894 | SecondVecType->getVectorKind() == VectorType::GenericVector) { | |||
10895 | if (FirstType->isSVESizelessBuiltinType()) | |||
10896 | return true; | |||
10897 | if (FirstType->isRVVSizelessBuiltinType()) { | |||
10898 | SVEorRVV = 1; | |||
10899 | return true; | |||
10900 | } | |||
10901 | } | |||
10902 | ||||
10903 | return false; | |||
10904 | }; | |||
10905 | ||||
10906 | if (IsSveRVVGnuConversion(LHSType, RHSType, SVEorRVV) || | |||
10907 | IsSveRVVGnuConversion(RHSType, LHSType, SVEorRVV)) { | |||
10908 | Diag(Loc, diag::err_typecheck_sve_rvv_gnu_ambiguous) | |||
10909 | << SVEorRVV << LHSType << RHSType; | |||
10910 | return QualType(); | |||
10911 | } | |||
10912 | ||||
10913 | // If there's a vector type and a scalar, try to convert the scalar to | |||
10914 | // the vector element type and splat. | |||
10915 | unsigned DiagID = diag::err_typecheck_vector_not_convertable; | |||
10916 | if (!RHSVecType) { | |||
10917 | if (isa<ExtVectorType>(LHSVecType)) { | |||
10918 | if (!tryVectorConvertAndSplat(*this, &RHS, RHSType, | |||
10919 | LHSVecType->getElementType(), LHSType, | |||
10920 | DiagID)) | |||
10921 | return LHSType; | |||
10922 | } else { | |||
10923 | if (!tryGCCVectorConvertAndSplat(*this, &RHS, &LHS)) | |||
10924 | return LHSType; | |||
10925 | } | |||
10926 | } | |||
10927 | if (!LHSVecType) { | |||
10928 | if (isa<ExtVectorType>(RHSVecType)) { | |||
10929 | if (!tryVectorConvertAndSplat(*this, (IsCompAssign ? nullptr : &LHS), | |||
10930 | LHSType, RHSVecType->getElementType(), | |||
10931 | RHSType, DiagID)) | |||
10932 | return RHSType; | |||
10933 | } else { | |||
10934 | if (LHS.get()->isLValue() || | |||
10935 | !tryGCCVectorConvertAndSplat(*this, &LHS, &RHS)) | |||
10936 | return RHSType; | |||
10937 | } | |||
10938 | } | |||
10939 | ||||
10940 | // FIXME: The code below also handles conversion between vectors and | |||
10941 | // non-scalars, we should break this down into fine grained specific checks | |||
10942 | // and emit proper diagnostics. | |||
10943 | QualType VecType = LHSVecType ? LHSType : RHSType; | |||
10944 | const VectorType *VT = LHSVecType ? LHSVecType : RHSVecType; | |||
10945 | QualType OtherType = LHSVecType ? RHSType : LHSType; | |||
10946 | ExprResult *OtherExpr = LHSVecType ? &RHS : &LHS; | |||
10947 | if (isLaxVectorConversion(OtherType, VecType)) { | |||
10948 | if (Context.getTargetInfo().getTriple().isPPC() && | |||
10949 | anyAltivecTypes(RHSType, LHSType) && | |||
10950 | !Context.areCompatibleVectorTypes(RHSType, LHSType)) | |||
10951 | Diag(Loc, diag::warn_deprecated_lax_vec_conv_all) << RHSType << LHSType; | |||
10952 | // If we're allowing lax vector conversions, only the total (data) size | |||
10953 | // needs to be the same. For non compound assignment, if one of the types is | |||
10954 | // scalar, the result is always the vector type. | |||
10955 | if (!IsCompAssign) { | |||
10956 | *OtherExpr = ImpCastExprToType(OtherExpr->get(), VecType, CK_BitCast); | |||
10957 | return VecType; | |||
10958 | // In a compound assignment, lhs += rhs, 'lhs' is a lvalue src, forbidding | |||
10959 | // any implicit cast. Here, the 'rhs' should be implicit casted to 'lhs' | |||
10960 | // type. Note that this is already done by non-compound assignments in | |||
10961 | // CheckAssignmentConstraints. If it's a scalar type, only bitcast for | |||
10962 | // <1 x T> -> T. The result is also a vector type. | |||
10963 | } else if (OtherType->isExtVectorType() || OtherType->isVectorType() || | |||
10964 | (OtherType->isScalarType() && VT->getNumElements() == 1)) { | |||
10965 | ExprResult *RHSExpr = &RHS; | |||
10966 | *RHSExpr = ImpCastExprToType(RHSExpr->get(), LHSType, CK_BitCast); | |||
10967 | return VecType; | |||
10968 | } | |||
10969 | } | |||
10970 | ||||
10971 | // Okay, the expression is invalid. | |||
10972 | ||||
10973 | // If there's a non-vector, non-real operand, diagnose that. | |||
10974 | if ((!RHSVecType && !RHSType->isRealType()) || | |||
10975 | (!LHSVecType && !LHSType->isRealType())) { | |||
10976 | Diag(Loc, diag::err_typecheck_vector_not_convertable_non_scalar) | |||
10977 | << LHSType << RHSType | |||
10978 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
10979 | return QualType(); | |||
10980 | } | |||
10981 | ||||
10982 | // OpenCL V1.1 6.2.6.p1: | |||
10983 | // If the operands are of more than one vector type, then an error shall | |||
10984 | // occur. Implicit conversions between vector types are not permitted, per | |||
10985 | // section 6.2.1. | |||
10986 | if (getLangOpts().OpenCL && | |||
10987 | RHSVecType && isa<ExtVectorType>(RHSVecType) && | |||
10988 | LHSVecType && isa<ExtVectorType>(LHSVecType)) { | |||
10989 | Diag(Loc, diag::err_opencl_implicit_vector_conversion) << LHSType | |||
10990 | << RHSType; | |||
10991 | return QualType(); | |||
10992 | } | |||
10993 | ||||
10994 | ||||
10995 | // If there is a vector type that is not a ExtVector and a scalar, we reach | |||
10996 | // this point if scalar could not be converted to the vector's element type | |||
10997 | // without truncation. | |||
10998 | if ((RHSVecType && !isa<ExtVectorType>(RHSVecType)) || | |||
10999 | (LHSVecType && !isa<ExtVectorType>(LHSVecType))) { | |||
11000 | QualType Scalar = LHSVecType ? RHSType : LHSType; | |||
11001 | QualType Vector = LHSVecType ? LHSType : RHSType; | |||
11002 | unsigned ScalarOrVector = LHSVecType && RHSVecType ? 1 : 0; | |||
11003 | Diag(Loc, | |||
11004 | diag::err_typecheck_vector_not_convertable_implict_truncation) | |||
11005 | << ScalarOrVector << Scalar << Vector; | |||
11006 | ||||
11007 | return QualType(); | |||
11008 | } | |||
11009 | ||||
11010 | // Otherwise, use the generic diagnostic. | |||
11011 | Diag(Loc, DiagID) | |||
11012 | << LHSType << RHSType | |||
11013 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11014 | return QualType(); | |||
11015 | } | |||
11016 | ||||
11017 | QualType Sema::CheckSizelessVectorOperands(ExprResult &LHS, ExprResult &RHS, | |||
11018 | SourceLocation Loc, | |||
11019 | bool IsCompAssign, | |||
11020 | ArithConvKind OperationKind) { | |||
11021 | if (!IsCompAssign) { | |||
11022 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
11023 | if (LHS.isInvalid()) | |||
11024 | return QualType(); | |||
11025 | } | |||
11026 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
11027 | if (RHS.isInvalid()) | |||
11028 | return QualType(); | |||
11029 | ||||
11030 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
11031 | QualType RHSType = RHS.get()->getType().getUnqualifiedType(); | |||
11032 | ||||
11033 | const BuiltinType *LHSBuiltinTy = LHSType->getAs<BuiltinType>(); | |||
11034 | const BuiltinType *RHSBuiltinTy = RHSType->getAs<BuiltinType>(); | |||
11035 | ||||
11036 | unsigned DiagID = diag::err_typecheck_invalid_operands; | |||
11037 | if ((OperationKind == ACK_Arithmetic) && | |||
11038 | ((LHSBuiltinTy && LHSBuiltinTy->isSVEBool()) || | |||
11039 | (RHSBuiltinTy && RHSBuiltinTy->isSVEBool()))) { | |||
11040 | Diag(Loc, DiagID) << LHSType << RHSType << LHS.get()->getSourceRange() | |||
11041 | << RHS.get()->getSourceRange(); | |||
11042 | return QualType(); | |||
11043 | } | |||
11044 | ||||
11045 | if (Context.hasSameType(LHSType, RHSType)) | |||
11046 | return LHSType; | |||
11047 | ||||
11048 | if (LHSType->isVLSTBuiltinType() && !RHSType->isVLSTBuiltinType()) { | |||
11049 | if (!tryGCCVectorConvertAndSplat(*this, &RHS, &LHS)) | |||
11050 | return LHSType; | |||
11051 | } | |||
11052 | if (RHSType->isVLSTBuiltinType() && !LHSType->isVLSTBuiltinType()) { | |||
11053 | if (LHS.get()->isLValue() || | |||
11054 | !tryGCCVectorConvertAndSplat(*this, &LHS, &RHS)) | |||
11055 | return RHSType; | |||
11056 | } | |||
11057 | ||||
11058 | if ((!LHSType->isVLSTBuiltinType() && !LHSType->isRealType()) || | |||
11059 | (!RHSType->isVLSTBuiltinType() && !RHSType->isRealType())) { | |||
11060 | Diag(Loc, diag::err_typecheck_vector_not_convertable_non_scalar) | |||
11061 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
11062 | << RHS.get()->getSourceRange(); | |||
11063 | return QualType(); | |||
11064 | } | |||
11065 | ||||
11066 | if (LHSType->isVLSTBuiltinType() && RHSType->isVLSTBuiltinType() && | |||
11067 | Context.getBuiltinVectorTypeInfo(LHSBuiltinTy).EC != | |||
11068 | Context.getBuiltinVectorTypeInfo(RHSBuiltinTy).EC) { | |||
11069 | Diag(Loc, diag::err_typecheck_vector_lengths_not_equal) | |||
11070 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
11071 | << RHS.get()->getSourceRange(); | |||
11072 | return QualType(); | |||
11073 | } | |||
11074 | ||||
11075 | if (LHSType->isVLSTBuiltinType() || RHSType->isVLSTBuiltinType()) { | |||
11076 | QualType Scalar = LHSType->isVLSTBuiltinType() ? RHSType : LHSType; | |||
11077 | QualType Vector = LHSType->isVLSTBuiltinType() ? LHSType : RHSType; | |||
11078 | bool ScalarOrVector = | |||
11079 | LHSType->isVLSTBuiltinType() && RHSType->isVLSTBuiltinType(); | |||
11080 | ||||
11081 | Diag(Loc, diag::err_typecheck_vector_not_convertable_implict_truncation) | |||
11082 | << ScalarOrVector << Scalar << Vector; | |||
11083 | ||||
11084 | return QualType(); | |||
11085 | } | |||
11086 | ||||
11087 | Diag(Loc, DiagID) << LHSType << RHSType << LHS.get()->getSourceRange() | |||
11088 | << RHS.get()->getSourceRange(); | |||
11089 | return QualType(); | |||
11090 | } | |||
11091 | ||||
11092 | // checkArithmeticNull - Detect when a NULL constant is used improperly in an | |||
11093 | // expression. These are mainly cases where the null pointer is used as an | |||
11094 | // integer instead of a pointer. | |||
11095 | static void checkArithmeticNull(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
11096 | SourceLocation Loc, bool IsCompare) { | |||
11097 | // The canonical way to check for a GNU null is with isNullPointerConstant, | |||
11098 | // but we use a bit of a hack here for speed; this is a relatively | |||
11099 | // hot path, and isNullPointerConstant is slow. | |||
11100 | bool LHSNull = isa<GNUNullExpr>(LHS.get()->IgnoreParenImpCasts()); | |||
11101 | bool RHSNull = isa<GNUNullExpr>(RHS.get()->IgnoreParenImpCasts()); | |||
11102 | ||||
11103 | QualType NonNullType = LHSNull ? RHS.get()->getType() : LHS.get()->getType(); | |||
11104 | ||||
11105 | // Avoid analyzing cases where the result will either be invalid (and | |||
11106 | // diagnosed as such) or entirely valid and not something to warn about. | |||
11107 | if ((!LHSNull && !RHSNull) || NonNullType->isBlockPointerType() || | |||
11108 | NonNullType->isMemberPointerType() || NonNullType->isFunctionType()) | |||
11109 | return; | |||
11110 | ||||
11111 | // Comparison operations would not make sense with a null pointer no matter | |||
11112 | // what the other expression is. | |||
11113 | if (!IsCompare) { | |||
11114 | S.Diag(Loc, diag::warn_null_in_arithmetic_operation) | |||
11115 | << (LHSNull ? LHS.get()->getSourceRange() : SourceRange()) | |||
11116 | << (RHSNull ? RHS.get()->getSourceRange() : SourceRange()); | |||
11117 | return; | |||
11118 | } | |||
11119 | ||||
11120 | // The rest of the operations only make sense with a null pointer | |||
11121 | // if the other expression is a pointer. | |||
11122 | if (LHSNull == RHSNull || NonNullType->isAnyPointerType() || | |||
11123 | NonNullType->canDecayToPointerType()) | |||
11124 | return; | |||
11125 | ||||
11126 | S.Diag(Loc, diag::warn_null_in_comparison_operation) | |||
11127 | << LHSNull /* LHS is NULL */ << NonNullType | |||
11128 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11129 | } | |||
11130 | ||||
11131 | static void DiagnoseDivisionSizeofPointerOrArray(Sema &S, Expr *LHS, Expr *RHS, | |||
11132 | SourceLocation Loc) { | |||
11133 | const auto *LUE = dyn_cast<UnaryExprOrTypeTraitExpr>(LHS); | |||
11134 | const auto *RUE = dyn_cast<UnaryExprOrTypeTraitExpr>(RHS); | |||
11135 | if (!LUE || !RUE) | |||
11136 | return; | |||
11137 | if (LUE->getKind() != UETT_SizeOf || LUE->isArgumentType() || | |||
11138 | RUE->getKind() != UETT_SizeOf) | |||
11139 | return; | |||
11140 | ||||
11141 | const Expr *LHSArg = LUE->getArgumentExpr()->IgnoreParens(); | |||
11142 | QualType LHSTy = LHSArg->getType(); | |||
11143 | QualType RHSTy; | |||
11144 | ||||
11145 | if (RUE->isArgumentType()) | |||
11146 | RHSTy = RUE->getArgumentType().getNonReferenceType(); | |||
11147 | else | |||
11148 | RHSTy = RUE->getArgumentExpr()->IgnoreParens()->getType(); | |||
11149 | ||||
11150 | if (LHSTy->isPointerType() && !RHSTy->isPointerType()) { | |||
11151 | if (!S.Context.hasSameUnqualifiedType(LHSTy->getPointeeType(), RHSTy)) | |||
11152 | return; | |||
11153 | ||||
11154 | S.Diag(Loc, diag::warn_division_sizeof_ptr) << LHS << LHS->getSourceRange(); | |||
11155 | if (const auto *DRE = dyn_cast<DeclRefExpr>(LHSArg)) { | |||
11156 | if (const ValueDecl *LHSArgDecl = DRE->getDecl()) | |||
11157 | S.Diag(LHSArgDecl->getLocation(), diag::note_pointer_declared_here) | |||
11158 | << LHSArgDecl; | |||
11159 | } | |||
11160 | } else if (const auto *ArrayTy = S.Context.getAsArrayType(LHSTy)) { | |||
11161 | QualType ArrayElemTy = ArrayTy->getElementType(); | |||
11162 | if (ArrayElemTy != S.Context.getBaseElementType(ArrayTy) || | |||
11163 | ArrayElemTy->isDependentType() || RHSTy->isDependentType() || | |||
11164 | RHSTy->isReferenceType() || ArrayElemTy->isCharType() || | |||
11165 | S.Context.getTypeSize(ArrayElemTy) == S.Context.getTypeSize(RHSTy)) | |||
11166 | return; | |||
11167 | S.Diag(Loc, diag::warn_division_sizeof_array) | |||
11168 | << LHSArg->getSourceRange() << ArrayElemTy << RHSTy; | |||
11169 | if (const auto *DRE = dyn_cast<DeclRefExpr>(LHSArg)) { | |||
11170 | if (const ValueDecl *LHSArgDecl = DRE->getDecl()) | |||
11171 | S.Diag(LHSArgDecl->getLocation(), diag::note_array_declared_here) | |||
11172 | << LHSArgDecl; | |||
11173 | } | |||
11174 | ||||
11175 | S.Diag(Loc, diag::note_precedence_silence) << RHS; | |||
11176 | } | |||
11177 | } | |||
11178 | ||||
11179 | static void DiagnoseBadDivideOrRemainderValues(Sema& S, ExprResult &LHS, | |||
11180 | ExprResult &RHS, | |||
11181 | SourceLocation Loc, bool IsDiv) { | |||
11182 | // Check for division/remainder by zero. | |||
11183 | Expr::EvalResult RHSValue; | |||
11184 | if (!RHS.get()->isValueDependent() && | |||
11185 | RHS.get()->EvaluateAsInt(RHSValue, S.Context) && | |||
11186 | RHSValue.Val.getInt() == 0) | |||
11187 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
11188 | S.PDiag(diag::warn_remainder_division_by_zero) | |||
11189 | << IsDiv << RHS.get()->getSourceRange()); | |||
11190 | } | |||
11191 | ||||
11192 | QualType Sema::CheckMultiplyDivideOperands(ExprResult &LHS, ExprResult &RHS, | |||
11193 | SourceLocation Loc, | |||
11194 | bool IsCompAssign, bool IsDiv) { | |||
11195 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
11196 | ||||
11197 | QualType LHSTy = LHS.get()->getType(); | |||
11198 | QualType RHSTy = RHS.get()->getType(); | |||
11199 | if (LHSTy->isVectorType() || RHSTy->isVectorType()) | |||
11200 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
11201 | /*AllowBothBool*/ getLangOpts().AltiVec, | |||
11202 | /*AllowBoolConversions*/ false, | |||
11203 | /*AllowBooleanOperation*/ false, | |||
11204 | /*ReportInvalid*/ true); | |||
11205 | if (LHSTy->isVLSTBuiltinType() || RHSTy->isVLSTBuiltinType()) | |||
11206 | return CheckSizelessVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
11207 | ACK_Arithmetic); | |||
11208 | if (!IsDiv && | |||
11209 | (LHSTy->isConstantMatrixType() || RHSTy->isConstantMatrixType())) | |||
11210 | return CheckMatrixMultiplyOperands(LHS, RHS, Loc, IsCompAssign); | |||
11211 | // For division, only matrix-by-scalar is supported. Other combinations with | |||
11212 | // matrix types are invalid. | |||
11213 | if (IsDiv && LHSTy->isConstantMatrixType() && RHSTy->isArithmeticType()) | |||
11214 | return CheckMatrixElementwiseOperands(LHS, RHS, Loc, IsCompAssign); | |||
11215 | ||||
11216 | QualType compType = UsualArithmeticConversions( | |||
11217 | LHS, RHS, Loc, IsCompAssign ? ACK_CompAssign : ACK_Arithmetic); | |||
11218 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11219 | return QualType(); | |||
11220 | ||||
11221 | ||||
11222 | if (compType.isNull() || !compType->isArithmeticType()) | |||
11223 | return InvalidOperands(Loc, LHS, RHS); | |||
11224 | if (IsDiv) { | |||
11225 | DiagnoseBadDivideOrRemainderValues(*this, LHS, RHS, Loc, IsDiv); | |||
11226 | DiagnoseDivisionSizeofPointerOrArray(*this, LHS.get(), RHS.get(), Loc); | |||
11227 | } | |||
11228 | return compType; | |||
11229 | } | |||
11230 | ||||
11231 | QualType Sema::CheckRemainderOperands( | |||
11232 | ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign) { | |||
11233 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
11234 | ||||
11235 | if (LHS.get()->getType()->isVectorType() || | |||
11236 | RHS.get()->getType()->isVectorType()) { | |||
11237 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
11238 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
11239 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
11240 | /*AllowBothBool*/ getLangOpts().AltiVec, | |||
11241 | /*AllowBoolConversions*/ false, | |||
11242 | /*AllowBooleanOperation*/ false, | |||
11243 | /*ReportInvalid*/ true); | |||
11244 | return InvalidOperands(Loc, LHS, RHS); | |||
11245 | } | |||
11246 | ||||
11247 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
11248 | RHS.get()->getType()->isVLSTBuiltinType()) { | |||
11249 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
11250 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
11251 | return CheckSizelessVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
11252 | ACK_Arithmetic); | |||
11253 | ||||
11254 | return InvalidOperands(Loc, LHS, RHS); | |||
11255 | } | |||
11256 | ||||
11257 | QualType compType = UsualArithmeticConversions( | |||
11258 | LHS, RHS, Loc, IsCompAssign ? ACK_CompAssign : ACK_Arithmetic); | |||
11259 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11260 | return QualType(); | |||
11261 | ||||
11262 | if (compType.isNull() || !compType->isIntegerType()) | |||
11263 | return InvalidOperands(Loc, LHS, RHS); | |||
11264 | DiagnoseBadDivideOrRemainderValues(*this, LHS, RHS, Loc, false /* IsDiv */); | |||
11265 | return compType; | |||
11266 | } | |||
11267 | ||||
11268 | /// Diagnose invalid arithmetic on two void pointers. | |||
11269 | static void diagnoseArithmeticOnTwoVoidPointers(Sema &S, SourceLocation Loc, | |||
11270 | Expr *LHSExpr, Expr *RHSExpr) { | |||
11271 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
11272 | ? diag::err_typecheck_pointer_arith_void_type | |||
11273 | : diag::ext_gnu_void_ptr) | |||
11274 | << 1 /* two pointers */ << LHSExpr->getSourceRange() | |||
11275 | << RHSExpr->getSourceRange(); | |||
11276 | } | |||
11277 | ||||
11278 | /// Diagnose invalid arithmetic on a void pointer. | |||
11279 | static void diagnoseArithmeticOnVoidPointer(Sema &S, SourceLocation Loc, | |||
11280 | Expr *Pointer) { | |||
11281 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
11282 | ? diag::err_typecheck_pointer_arith_void_type | |||
11283 | : diag::ext_gnu_void_ptr) | |||
11284 | << 0 /* one pointer */ << Pointer->getSourceRange(); | |||
11285 | } | |||
11286 | ||||
11287 | /// Diagnose invalid arithmetic on a null pointer. | |||
11288 | /// | |||
11289 | /// If \p IsGNUIdiom is true, the operation is using the 'p = (i8*)nullptr + n' | |||
11290 | /// idiom, which we recognize as a GNU extension. | |||
11291 | /// | |||
11292 | static void diagnoseArithmeticOnNullPointer(Sema &S, SourceLocation Loc, | |||
11293 | Expr *Pointer, bool IsGNUIdiom) { | |||
11294 | if (IsGNUIdiom) | |||
11295 | S.Diag(Loc, diag::warn_gnu_null_ptr_arith) | |||
11296 | << Pointer->getSourceRange(); | |||
11297 | else | |||
11298 | S.Diag(Loc, diag::warn_pointer_arith_null_ptr) | |||
11299 | << S.getLangOpts().CPlusPlus << Pointer->getSourceRange(); | |||
11300 | } | |||
11301 | ||||
11302 | /// Diagnose invalid subraction on a null pointer. | |||
11303 | /// | |||
11304 | static void diagnoseSubtractionOnNullPointer(Sema &S, SourceLocation Loc, | |||
11305 | Expr *Pointer, bool BothNull) { | |||
11306 | // Null - null is valid in C++ [expr.add]p7 | |||
11307 | if (BothNull && S.getLangOpts().CPlusPlus) | |||
11308 | return; | |||
11309 | ||||
11310 | // Is this s a macro from a system header? | |||
11311 | if (S.Diags.getSuppressSystemWarnings() && S.SourceMgr.isInSystemMacro(Loc)) | |||
11312 | return; | |||
11313 | ||||
11314 | S.DiagRuntimeBehavior(Loc, Pointer, | |||
11315 | S.PDiag(diag::warn_pointer_sub_null_ptr) | |||
11316 | << S.getLangOpts().CPlusPlus | |||
11317 | << Pointer->getSourceRange()); | |||
11318 | } | |||
11319 | ||||
11320 | /// Diagnose invalid arithmetic on two function pointers. | |||
11321 | static void diagnoseArithmeticOnTwoFunctionPointers(Sema &S, SourceLocation Loc, | |||
11322 | Expr *LHS, Expr *RHS) { | |||
11323 | assert(LHS->getType()->isAnyPointerType())(static_cast <bool> (LHS->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("LHS->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11323, __extension__ __PRETTY_FUNCTION__ )); | |||
11324 | assert(RHS->getType()->isAnyPointerType())(static_cast <bool> (RHS->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("RHS->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11324, __extension__ __PRETTY_FUNCTION__ )); | |||
11325 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
11326 | ? diag::err_typecheck_pointer_arith_function_type | |||
11327 | : diag::ext_gnu_ptr_func_arith) | |||
11328 | << 1 /* two pointers */ << LHS->getType()->getPointeeType() | |||
11329 | // We only show the second type if it differs from the first. | |||
11330 | << (unsigned)!S.Context.hasSameUnqualifiedType(LHS->getType(), | |||
11331 | RHS->getType()) | |||
11332 | << RHS->getType()->getPointeeType() | |||
11333 | << LHS->getSourceRange() << RHS->getSourceRange(); | |||
11334 | } | |||
11335 | ||||
11336 | /// Diagnose invalid arithmetic on a function pointer. | |||
11337 | static void diagnoseArithmeticOnFunctionPointer(Sema &S, SourceLocation Loc, | |||
11338 | Expr *Pointer) { | |||
11339 | assert(Pointer->getType()->isAnyPointerType())(static_cast <bool> (Pointer->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("Pointer->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11339, __extension__ __PRETTY_FUNCTION__ )); | |||
11340 | S.Diag(Loc, S.getLangOpts().CPlusPlus | |||
11341 | ? diag::err_typecheck_pointer_arith_function_type | |||
11342 | : diag::ext_gnu_ptr_func_arith) | |||
11343 | << 0 /* one pointer */ << Pointer->getType()->getPointeeType() | |||
11344 | << 0 /* one pointer, so only one type */ | |||
11345 | << Pointer->getSourceRange(); | |||
11346 | } | |||
11347 | ||||
11348 | /// Emit error if Operand is incomplete pointer type | |||
11349 | /// | |||
11350 | /// \returns True if pointer has incomplete type | |||
11351 | static bool checkArithmeticIncompletePointerType(Sema &S, SourceLocation Loc, | |||
11352 | Expr *Operand) { | |||
11353 | QualType ResType = Operand->getType(); | |||
11354 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
11355 | ResType = ResAtomicType->getValueType(); | |||
11356 | ||||
11357 | assert(ResType->isAnyPointerType() && !ResType->isDependentType())(static_cast <bool> (ResType->isAnyPointerType() && !ResType->isDependentType()) ? void (0) : __assert_fail ( "ResType->isAnyPointerType() && !ResType->isDependentType()" , "clang/lib/Sema/SemaExpr.cpp", 11357, __extension__ __PRETTY_FUNCTION__ )); | |||
11358 | QualType PointeeTy = ResType->getPointeeType(); | |||
11359 | return S.RequireCompleteSizedType( | |||
11360 | Loc, PointeeTy, | |||
11361 | diag::err_typecheck_arithmetic_incomplete_or_sizeless_type, | |||
11362 | Operand->getSourceRange()); | |||
11363 | } | |||
11364 | ||||
11365 | /// Check the validity of an arithmetic pointer operand. | |||
11366 | /// | |||
11367 | /// If the operand has pointer type, this code will check for pointer types | |||
11368 | /// which are invalid in arithmetic operations. These will be diagnosed | |||
11369 | /// appropriately, including whether or not the use is supported as an | |||
11370 | /// extension. | |||
11371 | /// | |||
11372 | /// \returns True when the operand is valid to use (even if as an extension). | |||
11373 | static bool checkArithmeticOpPointerOperand(Sema &S, SourceLocation Loc, | |||
11374 | Expr *Operand) { | |||
11375 | QualType ResType = Operand->getType(); | |||
11376 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
11377 | ResType = ResAtomicType->getValueType(); | |||
11378 | ||||
11379 | if (!ResType->isAnyPointerType()) return true; | |||
11380 | ||||
11381 | QualType PointeeTy = ResType->getPointeeType(); | |||
11382 | if (PointeeTy->isVoidType()) { | |||
11383 | diagnoseArithmeticOnVoidPointer(S, Loc, Operand); | |||
11384 | return !S.getLangOpts().CPlusPlus; | |||
11385 | } | |||
11386 | if (PointeeTy->isFunctionType()) { | |||
11387 | diagnoseArithmeticOnFunctionPointer(S, Loc, Operand); | |||
11388 | return !S.getLangOpts().CPlusPlus; | |||
11389 | } | |||
11390 | ||||
11391 | if (checkArithmeticIncompletePointerType(S, Loc, Operand)) return false; | |||
11392 | ||||
11393 | return true; | |||
11394 | } | |||
11395 | ||||
11396 | /// Check the validity of a binary arithmetic operation w.r.t. pointer | |||
11397 | /// operands. | |||
11398 | /// | |||
11399 | /// This routine will diagnose any invalid arithmetic on pointer operands much | |||
11400 | /// like \see checkArithmeticOpPointerOperand. However, it has special logic | |||
11401 | /// for emitting a single diagnostic even for operations where both LHS and RHS | |||
11402 | /// are (potentially problematic) pointers. | |||
11403 | /// | |||
11404 | /// \returns True when the operand is valid to use (even if as an extension). | |||
11405 | static bool checkArithmeticBinOpPointerOperands(Sema &S, SourceLocation Loc, | |||
11406 | Expr *LHSExpr, Expr *RHSExpr) { | |||
11407 | bool isLHSPointer = LHSExpr->getType()->isAnyPointerType(); | |||
11408 | bool isRHSPointer = RHSExpr->getType()->isAnyPointerType(); | |||
11409 | if (!isLHSPointer && !isRHSPointer) return true; | |||
11410 | ||||
11411 | QualType LHSPointeeTy, RHSPointeeTy; | |||
11412 | if (isLHSPointer) LHSPointeeTy = LHSExpr->getType()->getPointeeType(); | |||
11413 | if (isRHSPointer) RHSPointeeTy = RHSExpr->getType()->getPointeeType(); | |||
11414 | ||||
11415 | // if both are pointers check if operation is valid wrt address spaces | |||
11416 | if (isLHSPointer && isRHSPointer) { | |||
11417 | if (!LHSPointeeTy.isAddressSpaceOverlapping(RHSPointeeTy)) { | |||
11418 | S.Diag(Loc, | |||
11419 | diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
11420 | << LHSExpr->getType() << RHSExpr->getType() << 1 /*arithmetic op*/ | |||
11421 | << LHSExpr->getSourceRange() << RHSExpr->getSourceRange(); | |||
11422 | return false; | |||
11423 | } | |||
11424 | } | |||
11425 | ||||
11426 | // Check for arithmetic on pointers to incomplete types. | |||
11427 | bool isLHSVoidPtr = isLHSPointer && LHSPointeeTy->isVoidType(); | |||
11428 | bool isRHSVoidPtr = isRHSPointer && RHSPointeeTy->isVoidType(); | |||
11429 | if (isLHSVoidPtr || isRHSVoidPtr) { | |||
11430 | if (!isRHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, LHSExpr); | |||
11431 | else if (!isLHSVoidPtr) diagnoseArithmeticOnVoidPointer(S, Loc, RHSExpr); | |||
11432 | else diagnoseArithmeticOnTwoVoidPointers(S, Loc, LHSExpr, RHSExpr); | |||
11433 | ||||
11434 | return !S.getLangOpts().CPlusPlus; | |||
11435 | } | |||
11436 | ||||
11437 | bool isLHSFuncPtr = isLHSPointer && LHSPointeeTy->isFunctionType(); | |||
11438 | bool isRHSFuncPtr = isRHSPointer && RHSPointeeTy->isFunctionType(); | |||
11439 | if (isLHSFuncPtr || isRHSFuncPtr) { | |||
11440 | if (!isRHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc, LHSExpr); | |||
11441 | else if (!isLHSFuncPtr) diagnoseArithmeticOnFunctionPointer(S, Loc, | |||
11442 | RHSExpr); | |||
11443 | else diagnoseArithmeticOnTwoFunctionPointers(S, Loc, LHSExpr, RHSExpr); | |||
11444 | ||||
11445 | return !S.getLangOpts().CPlusPlus; | |||
11446 | } | |||
11447 | ||||
11448 | if (isLHSPointer && checkArithmeticIncompletePointerType(S, Loc, LHSExpr)) | |||
11449 | return false; | |||
11450 | if (isRHSPointer && checkArithmeticIncompletePointerType(S, Loc, RHSExpr)) | |||
11451 | return false; | |||
11452 | ||||
11453 | return true; | |||
11454 | } | |||
11455 | ||||
11456 | /// diagnoseStringPlusInt - Emit a warning when adding an integer to a string | |||
11457 | /// literal. | |||
11458 | static void diagnoseStringPlusInt(Sema &Self, SourceLocation OpLoc, | |||
11459 | Expr *LHSExpr, Expr *RHSExpr) { | |||
11460 | StringLiteral* StrExpr = dyn_cast<StringLiteral>(LHSExpr->IgnoreImpCasts()); | |||
11461 | Expr* IndexExpr = RHSExpr; | |||
11462 | if (!StrExpr) { | |||
11463 | StrExpr = dyn_cast<StringLiteral>(RHSExpr->IgnoreImpCasts()); | |||
11464 | IndexExpr = LHSExpr; | |||
11465 | } | |||
11466 | ||||
11467 | bool IsStringPlusInt = StrExpr && | |||
11468 | IndexExpr->getType()->isIntegralOrUnscopedEnumerationType(); | |||
11469 | if (!IsStringPlusInt || IndexExpr->isValueDependent()) | |||
11470 | return; | |||
11471 | ||||
11472 | SourceRange DiagRange(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
11473 | Self.Diag(OpLoc, diag::warn_string_plus_int) | |||
11474 | << DiagRange << IndexExpr->IgnoreImpCasts()->getType(); | |||
11475 | ||||
11476 | // Only print a fixit for "str" + int, not for int + "str". | |||
11477 | if (IndexExpr == RHSExpr) { | |||
11478 | SourceLocation EndLoc = Self.getLocForEndOfToken(RHSExpr->getEndLoc()); | |||
11479 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence) | |||
11480 | << FixItHint::CreateInsertion(LHSExpr->getBeginLoc(), "&") | |||
11481 | << FixItHint::CreateReplacement(SourceRange(OpLoc), "[") | |||
11482 | << FixItHint::CreateInsertion(EndLoc, "]"); | |||
11483 | } else | |||
11484 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence); | |||
11485 | } | |||
11486 | ||||
11487 | /// Emit a warning when adding a char literal to a string. | |||
11488 | static void diagnoseStringPlusChar(Sema &Self, SourceLocation OpLoc, | |||
11489 | Expr *LHSExpr, Expr *RHSExpr) { | |||
11490 | const Expr *StringRefExpr = LHSExpr; | |||
11491 | const CharacterLiteral *CharExpr = | |||
11492 | dyn_cast<CharacterLiteral>(RHSExpr->IgnoreImpCasts()); | |||
11493 | ||||
11494 | if (!CharExpr) { | |||
11495 | CharExpr = dyn_cast<CharacterLiteral>(LHSExpr->IgnoreImpCasts()); | |||
11496 | StringRefExpr = RHSExpr; | |||
11497 | } | |||
11498 | ||||
11499 | if (!CharExpr || !StringRefExpr) | |||
11500 | return; | |||
11501 | ||||
11502 | const QualType StringType = StringRefExpr->getType(); | |||
11503 | ||||
11504 | // Return if not a PointerType. | |||
11505 | if (!StringType->isAnyPointerType()) | |||
11506 | return; | |||
11507 | ||||
11508 | // Return if not a CharacterType. | |||
11509 | if (!StringType->getPointeeType()->isAnyCharacterType()) | |||
11510 | return; | |||
11511 | ||||
11512 | ASTContext &Ctx = Self.getASTContext(); | |||
11513 | SourceRange DiagRange(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
11514 | ||||
11515 | const QualType CharType = CharExpr->getType(); | |||
11516 | if (!CharType->isAnyCharacterType() && | |||
11517 | CharType->isIntegerType() && | |||
11518 | llvm::isUIntN(Ctx.getCharWidth(), CharExpr->getValue())) { | |||
11519 | Self.Diag(OpLoc, diag::warn_string_plus_char) | |||
11520 | << DiagRange << Ctx.CharTy; | |||
11521 | } else { | |||
11522 | Self.Diag(OpLoc, diag::warn_string_plus_char) | |||
11523 | << DiagRange << CharExpr->getType(); | |||
11524 | } | |||
11525 | ||||
11526 | // Only print a fixit for str + char, not for char + str. | |||
11527 | if (isa<CharacterLiteral>(RHSExpr->IgnoreImpCasts())) { | |||
11528 | SourceLocation EndLoc = Self.getLocForEndOfToken(RHSExpr->getEndLoc()); | |||
11529 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence) | |||
11530 | << FixItHint::CreateInsertion(LHSExpr->getBeginLoc(), "&") | |||
11531 | << FixItHint::CreateReplacement(SourceRange(OpLoc), "[") | |||
11532 | << FixItHint::CreateInsertion(EndLoc, "]"); | |||
11533 | } else { | |||
11534 | Self.Diag(OpLoc, diag::note_string_plus_scalar_silence); | |||
11535 | } | |||
11536 | } | |||
11537 | ||||
11538 | /// Emit error when two pointers are incompatible. | |||
11539 | static void diagnosePointerIncompatibility(Sema &S, SourceLocation Loc, | |||
11540 | Expr *LHSExpr, Expr *RHSExpr) { | |||
11541 | assert(LHSExpr->getType()->isAnyPointerType())(static_cast <bool> (LHSExpr->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("LHSExpr->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11541, __extension__ __PRETTY_FUNCTION__ )); | |||
11542 | assert(RHSExpr->getType()->isAnyPointerType())(static_cast <bool> (RHSExpr->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("RHSExpr->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11542, __extension__ __PRETTY_FUNCTION__ )); | |||
11543 | S.Diag(Loc, diag::err_typecheck_sub_ptr_compatible) | |||
11544 | << LHSExpr->getType() << RHSExpr->getType() << LHSExpr->getSourceRange() | |||
11545 | << RHSExpr->getSourceRange(); | |||
11546 | } | |||
11547 | ||||
11548 | // C99 6.5.6 | |||
11549 | QualType Sema::CheckAdditionOperands(ExprResult &LHS, ExprResult &RHS, | |||
11550 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
11551 | QualType* CompLHSTy) { | |||
11552 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
11553 | ||||
11554 | if (LHS.get()->getType()->isVectorType() || | |||
11555 | RHS.get()->getType()->isVectorType()) { | |||
11556 | QualType compType = | |||
11557 | CheckVectorOperands(LHS, RHS, Loc, CompLHSTy, | |||
11558 | /*AllowBothBool*/ getLangOpts().AltiVec, | |||
11559 | /*AllowBoolConversions*/ getLangOpts().ZVector, | |||
11560 | /*AllowBooleanOperation*/ false, | |||
11561 | /*ReportInvalid*/ true); | |||
11562 | if (CompLHSTy) *CompLHSTy = compType; | |||
11563 | return compType; | |||
11564 | } | |||
11565 | ||||
11566 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
11567 | RHS.get()->getType()->isVLSTBuiltinType()) { | |||
11568 | QualType compType = | |||
11569 | CheckSizelessVectorOperands(LHS, RHS, Loc, CompLHSTy, ACK_Arithmetic); | |||
11570 | if (CompLHSTy) | |||
11571 | *CompLHSTy = compType; | |||
11572 | return compType; | |||
11573 | } | |||
11574 | ||||
11575 | if (LHS.get()->getType()->isConstantMatrixType() || | |||
11576 | RHS.get()->getType()->isConstantMatrixType()) { | |||
11577 | QualType compType = | |||
11578 | CheckMatrixElementwiseOperands(LHS, RHS, Loc, CompLHSTy); | |||
11579 | if (CompLHSTy) | |||
11580 | *CompLHSTy = compType; | |||
11581 | return compType; | |||
11582 | } | |||
11583 | ||||
11584 | QualType compType = UsualArithmeticConversions( | |||
11585 | LHS, RHS, Loc, CompLHSTy ? ACK_CompAssign : ACK_Arithmetic); | |||
11586 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11587 | return QualType(); | |||
11588 | ||||
11589 | // Diagnose "string literal" '+' int and string '+' "char literal". | |||
11590 | if (Opc == BO_Add) { | |||
11591 | diagnoseStringPlusInt(*this, Loc, LHS.get(), RHS.get()); | |||
11592 | diagnoseStringPlusChar(*this, Loc, LHS.get(), RHS.get()); | |||
11593 | } | |||
11594 | ||||
11595 | // handle the common case first (both operands are arithmetic). | |||
11596 | if (!compType.isNull() && compType->isArithmeticType()) { | |||
11597 | if (CompLHSTy) *CompLHSTy = compType; | |||
11598 | return compType; | |||
11599 | } | |||
11600 | ||||
11601 | // Type-checking. Ultimately the pointer's going to be in PExp; | |||
11602 | // note that we bias towards the LHS being the pointer. | |||
11603 | Expr *PExp = LHS.get(), *IExp = RHS.get(); | |||
11604 | ||||
11605 | bool isObjCPointer; | |||
11606 | if (PExp->getType()->isPointerType()) { | |||
11607 | isObjCPointer = false; | |||
11608 | } else if (PExp->getType()->isObjCObjectPointerType()) { | |||
11609 | isObjCPointer = true; | |||
11610 | } else { | |||
11611 | std::swap(PExp, IExp); | |||
11612 | if (PExp->getType()->isPointerType()) { | |||
11613 | isObjCPointer = false; | |||
11614 | } else if (PExp->getType()->isObjCObjectPointerType()) { | |||
11615 | isObjCPointer = true; | |||
11616 | } else { | |||
11617 | return InvalidOperands(Loc, LHS, RHS); | |||
11618 | } | |||
11619 | } | |||
11620 | assert(PExp->getType()->isAnyPointerType())(static_cast <bool> (PExp->getType()->isAnyPointerType ()) ? void (0) : __assert_fail ("PExp->getType()->isAnyPointerType()" , "clang/lib/Sema/SemaExpr.cpp", 11620, __extension__ __PRETTY_FUNCTION__ )); | |||
11621 | ||||
11622 | if (!IExp->getType()->isIntegerType()) | |||
11623 | return InvalidOperands(Loc, LHS, RHS); | |||
11624 | ||||
11625 | // Adding to a null pointer results in undefined behavior. | |||
11626 | if (PExp->IgnoreParenCasts()->isNullPointerConstant( | |||
11627 | Context, Expr::NPC_ValueDependentIsNotNull)) { | |||
11628 | // In C++ adding zero to a null pointer is defined. | |||
11629 | Expr::EvalResult KnownVal; | |||
11630 | if (!getLangOpts().CPlusPlus || | |||
11631 | (!IExp->isValueDependent() && | |||
11632 | (!IExp->EvaluateAsInt(KnownVal, Context) || | |||
11633 | KnownVal.Val.getInt() != 0))) { | |||
11634 | // Check the conditions to see if this is the 'p = nullptr + n' idiom. | |||
11635 | bool IsGNUIdiom = BinaryOperator::isNullPointerArithmeticExtension( | |||
11636 | Context, BO_Add, PExp, IExp); | |||
11637 | diagnoseArithmeticOnNullPointer(*this, Loc, PExp, IsGNUIdiom); | |||
11638 | } | |||
11639 | } | |||
11640 | ||||
11641 | if (!checkArithmeticOpPointerOperand(*this, Loc, PExp)) | |||
11642 | return QualType(); | |||
11643 | ||||
11644 | if (isObjCPointer && checkArithmeticOnObjCPointer(*this, Loc, PExp)) | |||
11645 | return QualType(); | |||
11646 | ||||
11647 | // Check array bounds for pointer arithemtic | |||
11648 | CheckArrayAccess(PExp, IExp); | |||
11649 | ||||
11650 | if (CompLHSTy) { | |||
11651 | QualType LHSTy = Context.isPromotableBitField(LHS.get()); | |||
11652 | if (LHSTy.isNull()) { | |||
11653 | LHSTy = LHS.get()->getType(); | |||
11654 | if (Context.isPromotableIntegerType(LHSTy)) | |||
11655 | LHSTy = Context.getPromotedIntegerType(LHSTy); | |||
11656 | } | |||
11657 | *CompLHSTy = LHSTy; | |||
11658 | } | |||
11659 | ||||
11660 | return PExp->getType(); | |||
11661 | } | |||
11662 | ||||
11663 | // C99 6.5.6 | |||
11664 | QualType Sema::CheckSubtractionOperands(ExprResult &LHS, ExprResult &RHS, | |||
11665 | SourceLocation Loc, | |||
11666 | QualType* CompLHSTy) { | |||
11667 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
11668 | ||||
11669 | if (LHS.get()->getType()->isVectorType() || | |||
11670 | RHS.get()->getType()->isVectorType()) { | |||
11671 | QualType compType = | |||
11672 | CheckVectorOperands(LHS, RHS, Loc, CompLHSTy, | |||
11673 | /*AllowBothBool*/ getLangOpts().AltiVec, | |||
11674 | /*AllowBoolConversions*/ getLangOpts().ZVector, | |||
11675 | /*AllowBooleanOperation*/ false, | |||
11676 | /*ReportInvalid*/ true); | |||
11677 | if (CompLHSTy) *CompLHSTy = compType; | |||
11678 | return compType; | |||
11679 | } | |||
11680 | ||||
11681 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
11682 | RHS.get()->getType()->isVLSTBuiltinType()) { | |||
11683 | QualType compType = | |||
11684 | CheckSizelessVectorOperands(LHS, RHS, Loc, CompLHSTy, ACK_Arithmetic); | |||
11685 | if (CompLHSTy) | |||
11686 | *CompLHSTy = compType; | |||
11687 | return compType; | |||
11688 | } | |||
11689 | ||||
11690 | if (LHS.get()->getType()->isConstantMatrixType() || | |||
11691 | RHS.get()->getType()->isConstantMatrixType()) { | |||
11692 | QualType compType = | |||
11693 | CheckMatrixElementwiseOperands(LHS, RHS, Loc, CompLHSTy); | |||
11694 | if (CompLHSTy) | |||
11695 | *CompLHSTy = compType; | |||
11696 | return compType; | |||
11697 | } | |||
11698 | ||||
11699 | QualType compType = UsualArithmeticConversions( | |||
11700 | LHS, RHS, Loc, CompLHSTy ? ACK_CompAssign : ACK_Arithmetic); | |||
11701 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
11702 | return QualType(); | |||
11703 | ||||
11704 | // Enforce type constraints: C99 6.5.6p3. | |||
11705 | ||||
11706 | // Handle the common case first (both operands are arithmetic). | |||
11707 | if (!compType.isNull() && compType->isArithmeticType()) { | |||
11708 | if (CompLHSTy) *CompLHSTy = compType; | |||
11709 | return compType; | |||
11710 | } | |||
11711 | ||||
11712 | // Either ptr - int or ptr - ptr. | |||
11713 | if (LHS.get()->getType()->isAnyPointerType()) { | |||
11714 | QualType lpointee = LHS.get()->getType()->getPointeeType(); | |||
11715 | ||||
11716 | // Diagnose bad cases where we step over interface counts. | |||
11717 | if (LHS.get()->getType()->isObjCObjectPointerType() && | |||
11718 | checkArithmeticOnObjCPointer(*this, Loc, LHS.get())) | |||
11719 | return QualType(); | |||
11720 | ||||
11721 | // The result type of a pointer-int computation is the pointer type. | |||
11722 | if (RHS.get()->getType()->isIntegerType()) { | |||
11723 | // Subtracting from a null pointer should produce a warning. | |||
11724 | // The last argument to the diagnose call says this doesn't match the | |||
11725 | // GNU int-to-pointer idiom. | |||
11726 | if (LHS.get()->IgnoreParenCasts()->isNullPointerConstant(Context, | |||
11727 | Expr::NPC_ValueDependentIsNotNull)) { | |||
11728 | // In C++ adding zero to a null pointer is defined. | |||
11729 | Expr::EvalResult KnownVal; | |||
11730 | if (!getLangOpts().CPlusPlus || | |||
11731 | (!RHS.get()->isValueDependent() && | |||
11732 | (!RHS.get()->EvaluateAsInt(KnownVal, Context) || | |||
11733 | KnownVal.Val.getInt() != 0))) { | |||
11734 | diagnoseArithmeticOnNullPointer(*this, Loc, LHS.get(), false); | |||
11735 | } | |||
11736 | } | |||
11737 | ||||
11738 | if (!checkArithmeticOpPointerOperand(*this, Loc, LHS.get())) | |||
11739 | return QualType(); | |||
11740 | ||||
11741 | // Check array bounds for pointer arithemtic | |||
11742 | CheckArrayAccess(LHS.get(), RHS.get(), /*ArraySubscriptExpr*/nullptr, | |||
11743 | /*AllowOnePastEnd*/true, /*IndexNegated*/true); | |||
11744 | ||||
11745 | if (CompLHSTy) *CompLHSTy = LHS.get()->getType(); | |||
11746 | return LHS.get()->getType(); | |||
11747 | } | |||
11748 | ||||
11749 | // Handle pointer-pointer subtractions. | |||
11750 | if (const PointerType *RHSPTy | |||
11751 | = RHS.get()->getType()->getAs<PointerType>()) { | |||
11752 | QualType rpointee = RHSPTy->getPointeeType(); | |||
11753 | ||||
11754 | if (getLangOpts().CPlusPlus) { | |||
11755 | // Pointee types must be the same: C++ [expr.add] | |||
11756 | if (!Context.hasSameUnqualifiedType(lpointee, rpointee)) { | |||
11757 | diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get()); | |||
11758 | } | |||
11759 | } else { | |||
11760 | // Pointee types must be compatible C99 6.5.6p3 | |||
11761 | if (!Context.typesAreCompatible( | |||
11762 | Context.getCanonicalType(lpointee).getUnqualifiedType(), | |||
11763 | Context.getCanonicalType(rpointee).getUnqualifiedType())) { | |||
11764 | diagnosePointerIncompatibility(*this, Loc, LHS.get(), RHS.get()); | |||
11765 | return QualType(); | |||
11766 | } | |||
11767 | } | |||
11768 | ||||
11769 | if (!checkArithmeticBinOpPointerOperands(*this, Loc, | |||
11770 | LHS.get(), RHS.get())) | |||
11771 | return QualType(); | |||
11772 | ||||
11773 | bool LHSIsNullPtr = LHS.get()->IgnoreParenCasts()->isNullPointerConstant( | |||
11774 | Context, Expr::NPC_ValueDependentIsNotNull); | |||
11775 | bool RHSIsNullPtr = RHS.get()->IgnoreParenCasts()->isNullPointerConstant( | |||
11776 | Context, Expr::NPC_ValueDependentIsNotNull); | |||
11777 | ||||
11778 | // Subtracting nullptr or from nullptr is suspect | |||
11779 | if (LHSIsNullPtr) | |||
11780 | diagnoseSubtractionOnNullPointer(*this, Loc, LHS.get(), RHSIsNullPtr); | |||
11781 | if (RHSIsNullPtr) | |||
11782 | diagnoseSubtractionOnNullPointer(*this, Loc, RHS.get(), LHSIsNullPtr); | |||
11783 | ||||
11784 | // The pointee type may have zero size. As an extension, a structure or | |||
11785 | // union may have zero size or an array may have zero length. In this | |||
11786 | // case subtraction does not make sense. | |||
11787 | if (!rpointee->isVoidType() && !rpointee->isFunctionType()) { | |||
11788 | CharUnits ElementSize = Context.getTypeSizeInChars(rpointee); | |||
11789 | if (ElementSize.isZero()) { | |||
11790 | Diag(Loc,diag::warn_sub_ptr_zero_size_types) | |||
11791 | << rpointee.getUnqualifiedType() | |||
11792 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11793 | } | |||
11794 | } | |||
11795 | ||||
11796 | if (CompLHSTy) *CompLHSTy = LHS.get()->getType(); | |||
11797 | return Context.getPointerDiffType(); | |||
11798 | } | |||
11799 | } | |||
11800 | ||||
11801 | return InvalidOperands(Loc, LHS, RHS); | |||
11802 | } | |||
11803 | ||||
11804 | static bool isScopedEnumerationType(QualType T) { | |||
11805 | if (const EnumType *ET = T->getAs<EnumType>()) | |||
11806 | return ET->getDecl()->isScoped(); | |||
11807 | return false; | |||
11808 | } | |||
11809 | ||||
11810 | static void DiagnoseBadShiftValues(Sema& S, ExprResult &LHS, ExprResult &RHS, | |||
11811 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
11812 | QualType LHSType) { | |||
11813 | // OpenCL 6.3j: shift values are effectively % word size of LHS (more defined), | |||
11814 | // so skip remaining warnings as we don't want to modify values within Sema. | |||
11815 | if (S.getLangOpts().OpenCL) | |||
11816 | return; | |||
11817 | ||||
11818 | // Check right/shifter operand | |||
11819 | Expr::EvalResult RHSResult; | |||
11820 | if (RHS.get()->isValueDependent() || | |||
11821 | !RHS.get()->EvaluateAsInt(RHSResult, S.Context)) | |||
11822 | return; | |||
11823 | llvm::APSInt Right = RHSResult.Val.getInt(); | |||
11824 | ||||
11825 | if (Right.isNegative()) { | |||
11826 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
11827 | S.PDiag(diag::warn_shift_negative) | |||
11828 | << RHS.get()->getSourceRange()); | |||
11829 | return; | |||
11830 | } | |||
11831 | ||||
11832 | QualType LHSExprType = LHS.get()->getType(); | |||
11833 | uint64_t LeftSize = S.Context.getTypeSize(LHSExprType); | |||
11834 | if (LHSExprType->isBitIntType()) | |||
11835 | LeftSize = S.Context.getIntWidth(LHSExprType); | |||
11836 | else if (LHSExprType->isFixedPointType()) { | |||
11837 | auto FXSema = S.Context.getFixedPointSemantics(LHSExprType); | |||
11838 | LeftSize = FXSema.getWidth() - (unsigned)FXSema.hasUnsignedPadding(); | |||
11839 | } | |||
11840 | llvm::APInt LeftBits(Right.getBitWidth(), LeftSize); | |||
11841 | if (Right.uge(LeftBits)) { | |||
11842 | S.DiagRuntimeBehavior(Loc, RHS.get(), | |||
11843 | S.PDiag(diag::warn_shift_gt_typewidth) | |||
11844 | << RHS.get()->getSourceRange()); | |||
11845 | return; | |||
11846 | } | |||
11847 | ||||
11848 | // FIXME: We probably need to handle fixed point types specially here. | |||
11849 | if (Opc != BO_Shl || LHSExprType->isFixedPointType()) | |||
11850 | return; | |||
11851 | ||||
11852 | // When left shifting an ICE which is signed, we can check for overflow which | |||
11853 | // according to C++ standards prior to C++2a has undefined behavior | |||
11854 | // ([expr.shift] 5.8/2). Unsigned integers have defined behavior modulo one | |||
11855 | // more than the maximum value representable in the result type, so never | |||
11856 | // warn for those. (FIXME: Unsigned left-shift overflow in a constant | |||
11857 | // expression is still probably a bug.) | |||
11858 | Expr::EvalResult LHSResult; | |||
11859 | if (LHS.get()->isValueDependent() || | |||
11860 | LHSType->hasUnsignedIntegerRepresentation() || | |||
11861 | !LHS.get()->EvaluateAsInt(LHSResult, S.Context)) | |||
11862 | return; | |||
11863 | llvm::APSInt Left = LHSResult.Val.getInt(); | |||
11864 | ||||
11865 | // Don't warn if signed overflow is defined, then all the rest of the | |||
11866 | // diagnostics will not be triggered because the behavior is defined. | |||
11867 | // Also don't warn in C++20 mode (and newer), as signed left shifts | |||
11868 | // always wrap and never overflow. | |||
11869 | if (S.getLangOpts().isSignedOverflowDefined() || S.getLangOpts().CPlusPlus20) | |||
11870 | return; | |||
11871 | ||||
11872 | // If LHS does not have a non-negative value then, the | |||
11873 | // behavior is undefined before C++2a. Warn about it. | |||
11874 | if (Left.isNegative()) { | |||
11875 | S.DiagRuntimeBehavior(Loc, LHS.get(), | |||
11876 | S.PDiag(diag::warn_shift_lhs_negative) | |||
11877 | << LHS.get()->getSourceRange()); | |||
11878 | return; | |||
11879 | } | |||
11880 | ||||
11881 | llvm::APInt ResultBits = | |||
11882 | static_cast<llvm::APInt &>(Right) + Left.getSignificantBits(); | |||
11883 | if (LeftBits.uge(ResultBits)) | |||
11884 | return; | |||
11885 | llvm::APSInt Result = Left.extend(ResultBits.getLimitedValue()); | |||
11886 | Result = Result.shl(Right); | |||
11887 | ||||
11888 | // Print the bit representation of the signed integer as an unsigned | |||
11889 | // hexadecimal number. | |||
11890 | SmallString<40> HexResult; | |||
11891 | Result.toString(HexResult, 16, /*Signed =*/false, /*Literal =*/true); | |||
11892 | ||||
11893 | // If we are only missing a sign bit, this is less likely to result in actual | |||
11894 | // bugs -- if the result is cast back to an unsigned type, it will have the | |||
11895 | // expected value. Thus we place this behind a different warning that can be | |||
11896 | // turned off separately if needed. | |||
11897 | if (LeftBits == ResultBits - 1) { | |||
11898 | S.Diag(Loc, diag::warn_shift_result_sets_sign_bit) | |||
11899 | << HexResult << LHSType | |||
11900 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11901 | return; | |||
11902 | } | |||
11903 | ||||
11904 | S.Diag(Loc, diag::warn_shift_result_gt_typewidth) | |||
11905 | << HexResult.str() << Result.getSignificantBits() << LHSType | |||
11906 | << Left.getBitWidth() << LHS.get()->getSourceRange() | |||
11907 | << RHS.get()->getSourceRange(); | |||
11908 | } | |||
11909 | ||||
11910 | /// Return the resulting type when a vector is shifted | |||
11911 | /// by a scalar or vector shift amount. | |||
11912 | static QualType checkVectorShift(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
11913 | SourceLocation Loc, bool IsCompAssign) { | |||
11914 | // OpenCL v1.1 s6.3.j says RHS can be a vector only if LHS is a vector. | |||
11915 | if ((S.LangOpts.OpenCL || S.LangOpts.ZVector) && | |||
11916 | !LHS.get()->getType()->isVectorType()) { | |||
11917 | S.Diag(Loc, diag::err_shift_rhs_only_vector) | |||
11918 | << RHS.get()->getType() << LHS.get()->getType() | |||
11919 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11920 | return QualType(); | |||
11921 | } | |||
11922 | ||||
11923 | if (!IsCompAssign) { | |||
11924 | LHS = S.UsualUnaryConversions(LHS.get()); | |||
11925 | if (LHS.isInvalid()) return QualType(); | |||
11926 | } | |||
11927 | ||||
11928 | RHS = S.UsualUnaryConversions(RHS.get()); | |||
11929 | if (RHS.isInvalid()) return QualType(); | |||
11930 | ||||
11931 | QualType LHSType = LHS.get()->getType(); | |||
11932 | // Note that LHS might be a scalar because the routine calls not only in | |||
11933 | // OpenCL case. | |||
11934 | const VectorType *LHSVecTy = LHSType->getAs<VectorType>(); | |||
11935 | QualType LHSEleType = LHSVecTy ? LHSVecTy->getElementType() : LHSType; | |||
11936 | ||||
11937 | // Note that RHS might not be a vector. | |||
11938 | QualType RHSType = RHS.get()->getType(); | |||
11939 | const VectorType *RHSVecTy = RHSType->getAs<VectorType>(); | |||
11940 | QualType RHSEleType = RHSVecTy ? RHSVecTy->getElementType() : RHSType; | |||
11941 | ||||
11942 | // Do not allow shifts for boolean vectors. | |||
11943 | if ((LHSVecTy && LHSVecTy->isExtVectorBoolType()) || | |||
11944 | (RHSVecTy && RHSVecTy->isExtVectorBoolType())) { | |||
11945 | S.Diag(Loc, diag::err_typecheck_invalid_operands) | |||
11946 | << LHS.get()->getType() << RHS.get()->getType() | |||
11947 | << LHS.get()->getSourceRange(); | |||
11948 | return QualType(); | |||
11949 | } | |||
11950 | ||||
11951 | // The operands need to be integers. | |||
11952 | if (!LHSEleType->isIntegerType()) { | |||
11953 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
11954 | << LHS.get()->getType() << LHS.get()->getSourceRange(); | |||
11955 | return QualType(); | |||
11956 | } | |||
11957 | ||||
11958 | if (!RHSEleType->isIntegerType()) { | |||
11959 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
11960 | << RHS.get()->getType() << RHS.get()->getSourceRange(); | |||
11961 | return QualType(); | |||
11962 | } | |||
11963 | ||||
11964 | if (!LHSVecTy) { | |||
11965 | assert(RHSVecTy)(static_cast <bool> (RHSVecTy) ? void (0) : __assert_fail ("RHSVecTy", "clang/lib/Sema/SemaExpr.cpp", 11965, __extension__ __PRETTY_FUNCTION__)); | |||
11966 | if (IsCompAssign) | |||
11967 | return RHSType; | |||
11968 | if (LHSEleType != RHSEleType) { | |||
11969 | LHS = S.ImpCastExprToType(LHS.get(),RHSEleType, CK_IntegralCast); | |||
11970 | LHSEleType = RHSEleType; | |||
11971 | } | |||
11972 | QualType VecTy = | |||
11973 | S.Context.getExtVectorType(LHSEleType, RHSVecTy->getNumElements()); | |||
11974 | LHS = S.ImpCastExprToType(LHS.get(), VecTy, CK_VectorSplat); | |||
11975 | LHSType = VecTy; | |||
11976 | } else if (RHSVecTy) { | |||
11977 | // OpenCL v1.1 s6.3.j says that for vector types, the operators | |||
11978 | // are applied component-wise. So if RHS is a vector, then ensure | |||
11979 | // that the number of elements is the same as LHS... | |||
11980 | if (RHSVecTy->getNumElements() != LHSVecTy->getNumElements()) { | |||
11981 | S.Diag(Loc, diag::err_typecheck_vector_lengths_not_equal) | |||
11982 | << LHS.get()->getType() << RHS.get()->getType() | |||
11983 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11984 | return QualType(); | |||
11985 | } | |||
11986 | if (!S.LangOpts.OpenCL && !S.LangOpts.ZVector) { | |||
11987 | const BuiltinType *LHSBT = LHSEleType->getAs<clang::BuiltinType>(); | |||
11988 | const BuiltinType *RHSBT = RHSEleType->getAs<clang::BuiltinType>(); | |||
11989 | if (LHSBT != RHSBT && | |||
11990 | S.Context.getTypeSize(LHSBT) != S.Context.getTypeSize(RHSBT)) { | |||
11991 | S.Diag(Loc, diag::warn_typecheck_vector_element_sizes_not_equal) | |||
11992 | << LHS.get()->getType() << RHS.get()->getType() | |||
11993 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
11994 | } | |||
11995 | } | |||
11996 | } else { | |||
11997 | // ...else expand RHS to match the number of elements in LHS. | |||
11998 | QualType VecTy = | |||
11999 | S.Context.getExtVectorType(RHSEleType, LHSVecTy->getNumElements()); | |||
12000 | RHS = S.ImpCastExprToType(RHS.get(), VecTy, CK_VectorSplat); | |||
12001 | } | |||
12002 | ||||
12003 | return LHSType; | |||
12004 | } | |||
12005 | ||||
12006 | static QualType checkSizelessVectorShift(Sema &S, ExprResult &LHS, | |||
12007 | ExprResult &RHS, SourceLocation Loc, | |||
12008 | bool IsCompAssign) { | |||
12009 | if (!IsCompAssign) { | |||
12010 | LHS = S.UsualUnaryConversions(LHS.get()); | |||
12011 | if (LHS.isInvalid()) | |||
12012 | return QualType(); | |||
12013 | } | |||
12014 | ||||
12015 | RHS = S.UsualUnaryConversions(RHS.get()); | |||
12016 | if (RHS.isInvalid()) | |||
12017 | return QualType(); | |||
12018 | ||||
12019 | QualType LHSType = LHS.get()->getType(); | |||
12020 | const BuiltinType *LHSBuiltinTy = LHSType->getAs<BuiltinType>(); | |||
12021 | QualType LHSEleType = LHSType->isVLSTBuiltinType() | |||
12022 | ? LHSBuiltinTy->getSveEltType(S.getASTContext()) | |||
12023 | : LHSType; | |||
12024 | ||||
12025 | // Note that RHS might not be a vector | |||
12026 | QualType RHSType = RHS.get()->getType(); | |||
12027 | const BuiltinType *RHSBuiltinTy = RHSType->getAs<BuiltinType>(); | |||
12028 | QualType RHSEleType = RHSType->isVLSTBuiltinType() | |||
12029 | ? RHSBuiltinTy->getSveEltType(S.getASTContext()) | |||
12030 | : RHSType; | |||
12031 | ||||
12032 | if ((LHSBuiltinTy && LHSBuiltinTy->isSVEBool()) || | |||
12033 | (RHSBuiltinTy && RHSBuiltinTy->isSVEBool())) { | |||
12034 | S.Diag(Loc, diag::err_typecheck_invalid_operands) | |||
12035 | << LHSType << RHSType << LHS.get()->getSourceRange(); | |||
12036 | return QualType(); | |||
12037 | } | |||
12038 | ||||
12039 | if (!LHSEleType->isIntegerType()) { | |||
12040 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
12041 | << LHS.get()->getType() << LHS.get()->getSourceRange(); | |||
12042 | return QualType(); | |||
12043 | } | |||
12044 | ||||
12045 | if (!RHSEleType->isIntegerType()) { | |||
12046 | S.Diag(Loc, diag::err_typecheck_expect_int) | |||
12047 | << RHS.get()->getType() << RHS.get()->getSourceRange(); | |||
12048 | return QualType(); | |||
12049 | } | |||
12050 | ||||
12051 | if (LHSType->isVLSTBuiltinType() && RHSType->isVLSTBuiltinType() && | |||
12052 | (S.Context.getBuiltinVectorTypeInfo(LHSBuiltinTy).EC != | |||
12053 | S.Context.getBuiltinVectorTypeInfo(RHSBuiltinTy).EC)) { | |||
12054 | S.Diag(Loc, diag::err_typecheck_invalid_operands) | |||
12055 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12056 | << RHS.get()->getSourceRange(); | |||
12057 | return QualType(); | |||
12058 | } | |||
12059 | ||||
12060 | if (!LHSType->isVLSTBuiltinType()) { | |||
12061 | assert(RHSType->isVLSTBuiltinType())(static_cast <bool> (RHSType->isVLSTBuiltinType()) ? void (0) : __assert_fail ("RHSType->isVLSTBuiltinType()", "clang/lib/Sema/SemaExpr.cpp", 12061, __extension__ __PRETTY_FUNCTION__ )); | |||
12062 | if (IsCompAssign) | |||
12063 | return RHSType; | |||
12064 | if (LHSEleType != RHSEleType) { | |||
12065 | LHS = S.ImpCastExprToType(LHS.get(), RHSEleType, clang::CK_IntegralCast); | |||
12066 | LHSEleType = RHSEleType; | |||
12067 | } | |||
12068 | const llvm::ElementCount VecSize = | |||
12069 | S.Context.getBuiltinVectorTypeInfo(RHSBuiltinTy).EC; | |||
12070 | QualType VecTy = | |||
12071 | S.Context.getScalableVectorType(LHSEleType, VecSize.getKnownMinValue()); | |||
12072 | LHS = S.ImpCastExprToType(LHS.get(), VecTy, clang::CK_VectorSplat); | |||
12073 | LHSType = VecTy; | |||
12074 | } else if (RHSBuiltinTy && RHSBuiltinTy->isVLSTBuiltinType()) { | |||
12075 | if (S.Context.getTypeSize(RHSBuiltinTy) != | |||
12076 | S.Context.getTypeSize(LHSBuiltinTy)) { | |||
12077 | S.Diag(Loc, diag::err_typecheck_vector_lengths_not_equal) | |||
12078 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12079 | << RHS.get()->getSourceRange(); | |||
12080 | return QualType(); | |||
12081 | } | |||
12082 | } else { | |||
12083 | const llvm::ElementCount VecSize = | |||
12084 | S.Context.getBuiltinVectorTypeInfo(LHSBuiltinTy).EC; | |||
12085 | if (LHSEleType != RHSEleType) { | |||
12086 | RHS = S.ImpCastExprToType(RHS.get(), LHSEleType, clang::CK_IntegralCast); | |||
12087 | RHSEleType = LHSEleType; | |||
12088 | } | |||
12089 | QualType VecTy = | |||
12090 | S.Context.getScalableVectorType(RHSEleType, VecSize.getKnownMinValue()); | |||
12091 | RHS = S.ImpCastExprToType(RHS.get(), VecTy, CK_VectorSplat); | |||
12092 | } | |||
12093 | ||||
12094 | return LHSType; | |||
12095 | } | |||
12096 | ||||
12097 | // C99 6.5.7 | |||
12098 | QualType Sema::CheckShiftOperands(ExprResult &LHS, ExprResult &RHS, | |||
12099 | SourceLocation Loc, BinaryOperatorKind Opc, | |||
12100 | bool IsCompAssign) { | |||
12101 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
12102 | ||||
12103 | // Vector shifts promote their scalar inputs to vector type. | |||
12104 | if (LHS.get()->getType()->isVectorType() || | |||
12105 | RHS.get()->getType()->isVectorType()) { | |||
12106 | if (LangOpts.ZVector) { | |||
12107 | // The shift operators for the z vector extensions work basically | |||
12108 | // like general shifts, except that neither the LHS nor the RHS is | |||
12109 | // allowed to be a "vector bool". | |||
12110 | if (auto LHSVecType = LHS.get()->getType()->getAs<VectorType>()) | |||
12111 | if (LHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
12112 | return InvalidOperands(Loc, LHS, RHS); | |||
12113 | if (auto RHSVecType = RHS.get()->getType()->getAs<VectorType>()) | |||
12114 | if (RHSVecType->getVectorKind() == VectorType::AltiVecBool) | |||
12115 | return InvalidOperands(Loc, LHS, RHS); | |||
12116 | } | |||
12117 | return checkVectorShift(*this, LHS, RHS, Loc, IsCompAssign); | |||
12118 | } | |||
12119 | ||||
12120 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
12121 | RHS.get()->getType()->isVLSTBuiltinType()) | |||
12122 | return checkSizelessVectorShift(*this, LHS, RHS, Loc, IsCompAssign); | |||
12123 | ||||
12124 | // Shifts don't perform usual arithmetic conversions, they just do integer | |||
12125 | // promotions on each operand. C99 6.5.7p3 | |||
12126 | ||||
12127 | // For the LHS, do usual unary conversions, but then reset them away | |||
12128 | // if this is a compound assignment. | |||
12129 | ExprResult OldLHS = LHS; | |||
12130 | LHS = UsualUnaryConversions(LHS.get()); | |||
12131 | if (LHS.isInvalid()) | |||
12132 | return QualType(); | |||
12133 | QualType LHSType = LHS.get()->getType(); | |||
12134 | if (IsCompAssign) LHS = OldLHS; | |||
12135 | ||||
12136 | // The RHS is simpler. | |||
12137 | RHS = UsualUnaryConversions(RHS.get()); | |||
12138 | if (RHS.isInvalid()) | |||
12139 | return QualType(); | |||
12140 | QualType RHSType = RHS.get()->getType(); | |||
12141 | ||||
12142 | // C99 6.5.7p2: Each of the operands shall have integer type. | |||
12143 | // Embedded-C 4.1.6.2.2: The LHS may also be fixed-point. | |||
12144 | if ((!LHSType->isFixedPointOrIntegerType() && | |||
12145 | !LHSType->hasIntegerRepresentation()) || | |||
12146 | !RHSType->hasIntegerRepresentation()) | |||
12147 | return InvalidOperands(Loc, LHS, RHS); | |||
12148 | ||||
12149 | // C++0x: Don't allow scoped enums. FIXME: Use something better than | |||
12150 | // hasIntegerRepresentation() above instead of this. | |||
12151 | if (isScopedEnumerationType(LHSType) || | |||
12152 | isScopedEnumerationType(RHSType)) { | |||
12153 | return InvalidOperands(Loc, LHS, RHS); | |||
12154 | } | |||
12155 | DiagnoseBadShiftValues(*this, LHS, RHS, Loc, Opc, LHSType); | |||
12156 | ||||
12157 | // "The type of the result is that of the promoted left operand." | |||
12158 | return LHSType; | |||
12159 | } | |||
12160 | ||||
12161 | /// Diagnose bad pointer comparisons. | |||
12162 | static void diagnoseDistinctPointerComparison(Sema &S, SourceLocation Loc, | |||
12163 | ExprResult &LHS, ExprResult &RHS, | |||
12164 | bool IsError) { | |||
12165 | S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_distinct_pointers | |||
12166 | : diag::ext_typecheck_comparison_of_distinct_pointers) | |||
12167 | << LHS.get()->getType() << RHS.get()->getType() | |||
12168 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
12169 | } | |||
12170 | ||||
12171 | /// Returns false if the pointers are converted to a composite type, | |||
12172 | /// true otherwise. | |||
12173 | static bool convertPointersToCompositeType(Sema &S, SourceLocation Loc, | |||
12174 | ExprResult &LHS, ExprResult &RHS) { | |||
12175 | // C++ [expr.rel]p2: | |||
12176 | // [...] Pointer conversions (4.10) and qualification | |||
12177 | // conversions (4.4) are performed on pointer operands (or on | |||
12178 | // a pointer operand and a null pointer constant) to bring | |||
12179 | // them to their composite pointer type. [...] | |||
12180 | // | |||
12181 | // C++ [expr.eq]p1 uses the same notion for (in)equality | |||
12182 | // comparisons of pointers. | |||
12183 | ||||
12184 | QualType LHSType = LHS.get()->getType(); | |||
12185 | QualType RHSType = RHS.get()->getType(); | |||
12186 | 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()" , "clang/lib/Sema/SemaExpr.cpp", 12187, __extension__ __PRETTY_FUNCTION__ )) | |||
12187 | 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()" , "clang/lib/Sema/SemaExpr.cpp", 12187, __extension__ __PRETTY_FUNCTION__ )); | |||
12188 | ||||
12189 | QualType T = S.FindCompositePointerType(Loc, LHS, RHS); | |||
12190 | if (T.isNull()) { | |||
12191 | if ((LHSType->isAnyPointerType() || LHSType->isMemberPointerType()) && | |||
12192 | (RHSType->isAnyPointerType() || RHSType->isMemberPointerType())) | |||
12193 | diagnoseDistinctPointerComparison(S, Loc, LHS, RHS, /*isError*/true); | |||
12194 | else | |||
12195 | S.InvalidOperands(Loc, LHS, RHS); | |||
12196 | return true; | |||
12197 | } | |||
12198 | ||||
12199 | return false; | |||
12200 | } | |||
12201 | ||||
12202 | static void diagnoseFunctionPointerToVoidComparison(Sema &S, SourceLocation Loc, | |||
12203 | ExprResult &LHS, | |||
12204 | ExprResult &RHS, | |||
12205 | bool IsError) { | |||
12206 | S.Diag(Loc, IsError ? diag::err_typecheck_comparison_of_fptr_to_void | |||
12207 | : diag::ext_typecheck_comparison_of_fptr_to_void) | |||
12208 | << LHS.get()->getType() << RHS.get()->getType() | |||
12209 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
12210 | } | |||
12211 | ||||
12212 | static bool isObjCObjectLiteral(ExprResult &E) { | |||
12213 | switch (E.get()->IgnoreParenImpCasts()->getStmtClass()) { | |||
12214 | case Stmt::ObjCArrayLiteralClass: | |||
12215 | case Stmt::ObjCDictionaryLiteralClass: | |||
12216 | case Stmt::ObjCStringLiteralClass: | |||
12217 | case Stmt::ObjCBoxedExprClass: | |||
12218 | return true; | |||
12219 | default: | |||
12220 | // Note that ObjCBoolLiteral is NOT an object literal! | |||
12221 | return false; | |||
12222 | } | |||
12223 | } | |||
12224 | ||||
12225 | static bool hasIsEqualMethod(Sema &S, const Expr *LHS, const Expr *RHS) { | |||
12226 | const ObjCObjectPointerType *Type = | |||
12227 | LHS->getType()->getAs<ObjCObjectPointerType>(); | |||
12228 | ||||
12229 | // If this is not actually an Objective-C object, bail out. | |||
12230 | if (!Type) | |||
12231 | return false; | |||
12232 | ||||
12233 | // Get the LHS object's interface type. | |||
12234 | QualType InterfaceType = Type->getPointeeType(); | |||
12235 | ||||
12236 | // If the RHS isn't an Objective-C object, bail out. | |||
12237 | if (!RHS->getType()->isObjCObjectPointerType()) | |||
12238 | return false; | |||
12239 | ||||
12240 | // Try to find the -isEqual: method. | |||
12241 | Selector IsEqualSel = S.NSAPIObj->getIsEqualSelector(); | |||
12242 | ObjCMethodDecl *Method = S.LookupMethodInObjectType(IsEqualSel, | |||
12243 | InterfaceType, | |||
12244 | /*IsInstance=*/true); | |||
12245 | if (!Method) { | |||
12246 | if (Type->isObjCIdType()) { | |||
12247 | // For 'id', just check the global pool. | |||
12248 | Method = S.LookupInstanceMethodInGlobalPool(IsEqualSel, SourceRange(), | |||
12249 | /*receiverId=*/true); | |||
12250 | } else { | |||
12251 | // Check protocols. | |||
12252 | Method = S.LookupMethodInQualifiedType(IsEqualSel, Type, | |||
12253 | /*IsInstance=*/true); | |||
12254 | } | |||
12255 | } | |||
12256 | ||||
12257 | if (!Method) | |||
12258 | return false; | |||
12259 | ||||
12260 | QualType T = Method->parameters()[0]->getType(); | |||
12261 | if (!T->isObjCObjectPointerType()) | |||
12262 | return false; | |||
12263 | ||||
12264 | QualType R = Method->getReturnType(); | |||
12265 | if (!R->isScalarType()) | |||
12266 | return false; | |||
12267 | ||||
12268 | return true; | |||
12269 | } | |||
12270 | ||||
12271 | Sema::ObjCLiteralKind Sema::CheckLiteralKind(Expr *FromE) { | |||
12272 | FromE = FromE->IgnoreParenImpCasts(); | |||
12273 | switch (FromE->getStmtClass()) { | |||
12274 | default: | |||
12275 | break; | |||
12276 | case Stmt::ObjCStringLiteralClass: | |||
12277 | // "string literal" | |||
12278 | return LK_String; | |||
12279 | case Stmt::ObjCArrayLiteralClass: | |||
12280 | // "array literal" | |||
12281 | return LK_Array; | |||
12282 | case Stmt::ObjCDictionaryLiteralClass: | |||
12283 | // "dictionary literal" | |||
12284 | return LK_Dictionary; | |||
12285 | case Stmt::BlockExprClass: | |||
12286 | return LK_Block; | |||
12287 | case Stmt::ObjCBoxedExprClass: { | |||
12288 | Expr *Inner = cast<ObjCBoxedExpr>(FromE)->getSubExpr()->IgnoreParens(); | |||
12289 | switch (Inner->getStmtClass()) { | |||
12290 | case Stmt::IntegerLiteralClass: | |||
12291 | case Stmt::FloatingLiteralClass: | |||
12292 | case Stmt::CharacterLiteralClass: | |||
12293 | case Stmt::ObjCBoolLiteralExprClass: | |||
12294 | case Stmt::CXXBoolLiteralExprClass: | |||
12295 | // "numeric literal" | |||
12296 | return LK_Numeric; | |||
12297 | case Stmt::ImplicitCastExprClass: { | |||
12298 | CastKind CK = cast<CastExpr>(Inner)->getCastKind(); | |||
12299 | // Boolean literals can be represented by implicit casts. | |||
12300 | if (CK == CK_IntegralToBoolean || CK == CK_IntegralCast) | |||
12301 | return LK_Numeric; | |||
12302 | break; | |||
12303 | } | |||
12304 | default: | |||
12305 | break; | |||
12306 | } | |||
12307 | return LK_Boxed; | |||
12308 | } | |||
12309 | } | |||
12310 | return LK_None; | |||
12311 | } | |||
12312 | ||||
12313 | static void diagnoseObjCLiteralComparison(Sema &S, SourceLocation Loc, | |||
12314 | ExprResult &LHS, ExprResult &RHS, | |||
12315 | BinaryOperator::Opcode Opc){ | |||
12316 | Expr *Literal; | |||
12317 | Expr *Other; | |||
12318 | if (isObjCObjectLiteral(LHS)) { | |||
12319 | Literal = LHS.get(); | |||
12320 | Other = RHS.get(); | |||
12321 | } else { | |||
12322 | Literal = RHS.get(); | |||
12323 | Other = LHS.get(); | |||
12324 | } | |||
12325 | ||||
12326 | // Don't warn on comparisons against nil. | |||
12327 | Other = Other->IgnoreParenCasts(); | |||
12328 | if (Other->isNullPointerConstant(S.getASTContext(), | |||
12329 | Expr::NPC_ValueDependentIsNotNull)) | |||
12330 | return; | |||
12331 | ||||
12332 | // This should be kept in sync with warn_objc_literal_comparison. | |||
12333 | // LK_String should always be after the other literals, since it has its own | |||
12334 | // warning flag. | |||
12335 | Sema::ObjCLiteralKind LiteralKind = S.CheckLiteralKind(Literal); | |||
12336 | assert(LiteralKind != Sema::LK_Block)(static_cast <bool> (LiteralKind != Sema::LK_Block) ? void (0) : __assert_fail ("LiteralKind != Sema::LK_Block", "clang/lib/Sema/SemaExpr.cpp" , 12336, __extension__ __PRETTY_FUNCTION__)); | |||
12337 | if (LiteralKind == Sema::LK_None) { | |||
12338 | llvm_unreachable("Unknown Objective-C object literal kind")::llvm::llvm_unreachable_internal("Unknown Objective-C object literal kind" , "clang/lib/Sema/SemaExpr.cpp", 12338); | |||
12339 | } | |||
12340 | ||||
12341 | if (LiteralKind == Sema::LK_String) | |||
12342 | S.Diag(Loc, diag::warn_objc_string_literal_comparison) | |||
12343 | << Literal->getSourceRange(); | |||
12344 | else | |||
12345 | S.Diag(Loc, diag::warn_objc_literal_comparison) | |||
12346 | << LiteralKind << Literal->getSourceRange(); | |||
12347 | ||||
12348 | if (BinaryOperator::isEqualityOp(Opc) && | |||
12349 | hasIsEqualMethod(S, LHS.get(), RHS.get())) { | |||
12350 | SourceLocation Start = LHS.get()->getBeginLoc(); | |||
12351 | SourceLocation End = S.getLocForEndOfToken(RHS.get()->getEndLoc()); | |||
12352 | CharSourceRange OpRange = | |||
12353 | CharSourceRange::getCharRange(Loc, S.getLocForEndOfToken(Loc)); | |||
12354 | ||||
12355 | S.Diag(Loc, diag::note_objc_literal_comparison_isequal) | |||
12356 | << FixItHint::CreateInsertion(Start, Opc == BO_EQ ? "[" : "![") | |||
12357 | << FixItHint::CreateReplacement(OpRange, " isEqual:") | |||
12358 | << FixItHint::CreateInsertion(End, "]"); | |||
12359 | } | |||
12360 | } | |||
12361 | ||||
12362 | /// Warns on !x < y, !x & y where !(x < y), !(x & y) was probably intended. | |||
12363 | static void diagnoseLogicalNotOnLHSofCheck(Sema &S, ExprResult &LHS, | |||
12364 | ExprResult &RHS, SourceLocation Loc, | |||
12365 | BinaryOperatorKind Opc) { | |||
12366 | // Check that left hand side is !something. | |||
12367 | UnaryOperator *UO = dyn_cast<UnaryOperator>(LHS.get()->IgnoreImpCasts()); | |||
12368 | if (!UO || UO->getOpcode() != UO_LNot) return; | |||
12369 | ||||
12370 | // Only check if the right hand side is non-bool arithmetic type. | |||
12371 | if (RHS.get()->isKnownToHaveBooleanValue()) return; | |||
12372 | ||||
12373 | // Make sure that the something in !something is not bool. | |||
12374 | Expr *SubExpr = UO->getSubExpr()->IgnoreImpCasts(); | |||
12375 | if (SubExpr->isKnownToHaveBooleanValue()) return; | |||
12376 | ||||
12377 | // Emit warning. | |||
12378 | bool IsBitwiseOp = Opc == BO_And || Opc == BO_Or || Opc == BO_Xor; | |||
12379 | S.Diag(UO->getOperatorLoc(), diag::warn_logical_not_on_lhs_of_check) | |||
12380 | << Loc << IsBitwiseOp; | |||
12381 | ||||
12382 | // First note suggest !(x < y) | |||
12383 | SourceLocation FirstOpen = SubExpr->getBeginLoc(); | |||
12384 | SourceLocation FirstClose = RHS.get()->getEndLoc(); | |||
12385 | FirstClose = S.getLocForEndOfToken(FirstClose); | |||
12386 | if (FirstClose.isInvalid()) | |||
12387 | FirstOpen = SourceLocation(); | |||
12388 | S.Diag(UO->getOperatorLoc(), diag::note_logical_not_fix) | |||
12389 | << IsBitwiseOp | |||
12390 | << FixItHint::CreateInsertion(FirstOpen, "(") | |||
12391 | << FixItHint::CreateInsertion(FirstClose, ")"); | |||
12392 | ||||
12393 | // Second note suggests (!x) < y | |||
12394 | SourceLocation SecondOpen = LHS.get()->getBeginLoc(); | |||
12395 | SourceLocation SecondClose = LHS.get()->getEndLoc(); | |||
12396 | SecondClose = S.getLocForEndOfToken(SecondClose); | |||
12397 | if (SecondClose.isInvalid()) | |||
12398 | SecondOpen = SourceLocation(); | |||
12399 | S.Diag(UO->getOperatorLoc(), diag::note_logical_not_silence_with_parens) | |||
12400 | << FixItHint::CreateInsertion(SecondOpen, "(") | |||
12401 | << FixItHint::CreateInsertion(SecondClose, ")"); | |||
12402 | } | |||
12403 | ||||
12404 | // Returns true if E refers to a non-weak array. | |||
12405 | static bool checkForArray(const Expr *E) { | |||
12406 | const ValueDecl *D = nullptr; | |||
12407 | if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E)) { | |||
12408 | D = DR->getDecl(); | |||
12409 | } else if (const MemberExpr *Mem = dyn_cast<MemberExpr>(E)) { | |||
12410 | if (Mem->isImplicitAccess()) | |||
12411 | D = Mem->getMemberDecl(); | |||
12412 | } | |||
12413 | if (!D) | |||
12414 | return false; | |||
12415 | return D->getType()->isArrayType() && !D->isWeak(); | |||
12416 | } | |||
12417 | ||||
12418 | /// Diagnose some forms of syntactically-obvious tautological comparison. | |||
12419 | static void diagnoseTautologicalComparison(Sema &S, SourceLocation Loc, | |||
12420 | Expr *LHS, Expr *RHS, | |||
12421 | BinaryOperatorKind Opc) { | |||
12422 | Expr *LHSStripped = LHS->IgnoreParenImpCasts(); | |||
12423 | Expr *RHSStripped = RHS->IgnoreParenImpCasts(); | |||
12424 | ||||
12425 | QualType LHSType = LHS->getType(); | |||
12426 | QualType RHSType = RHS->getType(); | |||
12427 | if (LHSType->hasFloatingRepresentation() || | |||
12428 | (LHSType->isBlockPointerType() && !BinaryOperator::isEqualityOp(Opc)) || | |||
12429 | S.inTemplateInstantiation()) | |||
12430 | return; | |||
12431 | ||||
12432 | // Comparisons between two array types are ill-formed for operator<=>, so | |||
12433 | // we shouldn't emit any additional warnings about it. | |||
12434 | if (Opc == BO_Cmp && LHSType->isArrayType() && RHSType->isArrayType()) | |||
12435 | return; | |||
12436 | ||||
12437 | // For non-floating point types, check for self-comparisons of the form | |||
12438 | // x == x, x != x, x < x, etc. These always evaluate to a constant, and | |||
12439 | // often indicate logic errors in the program. | |||
12440 | // | |||
12441 | // NOTE: Don't warn about comparison expressions resulting from macro | |||
12442 | // expansion. Also don't warn about comparisons which are only self | |||
12443 | // comparisons within a template instantiation. The warnings should catch | |||
12444 | // obvious cases in the definition of the template anyways. The idea is to | |||
12445 | // warn when the typed comparison operator will always evaluate to the same | |||
12446 | // result. | |||
12447 | ||||
12448 | // Used for indexing into %select in warn_comparison_always | |||
12449 | enum { | |||
12450 | AlwaysConstant, | |||
12451 | AlwaysTrue, | |||
12452 | AlwaysFalse, | |||
12453 | AlwaysEqual, // std::strong_ordering::equal from operator<=> | |||
12454 | }; | |||
12455 | ||||
12456 | // C++2a [depr.array.comp]: | |||
12457 | // Equality and relational comparisons ([expr.eq], [expr.rel]) between two | |||
12458 | // operands of array type are deprecated. | |||
12459 | if (S.getLangOpts().CPlusPlus20 && LHSStripped->getType()->isArrayType() && | |||
12460 | RHSStripped->getType()->isArrayType()) { | |||
12461 | S.Diag(Loc, diag::warn_depr_array_comparison) | |||
12462 | << LHS->getSourceRange() << RHS->getSourceRange() | |||
12463 | << LHSStripped->getType() << RHSStripped->getType(); | |||
12464 | // Carry on to produce the tautological comparison warning, if this | |||
12465 | // expression is potentially-evaluated, we can resolve the array to a | |||
12466 | // non-weak declaration, and so on. | |||
12467 | } | |||
12468 | ||||
12469 | if (!LHS->getBeginLoc().isMacroID() && !RHS->getBeginLoc().isMacroID()) { | |||
12470 | if (Expr::isSameComparisonOperand(LHS, RHS)) { | |||
12471 | unsigned Result; | |||
12472 | switch (Opc) { | |||
12473 | case BO_EQ: | |||
12474 | case BO_LE: | |||
12475 | case BO_GE: | |||
12476 | Result = AlwaysTrue; | |||
12477 | break; | |||
12478 | case BO_NE: | |||
12479 | case BO_LT: | |||
12480 | case BO_GT: | |||
12481 | Result = AlwaysFalse; | |||
12482 | break; | |||
12483 | case BO_Cmp: | |||
12484 | Result = AlwaysEqual; | |||
12485 | break; | |||
12486 | default: | |||
12487 | Result = AlwaysConstant; | |||
12488 | break; | |||
12489 | } | |||
12490 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
12491 | S.PDiag(diag::warn_comparison_always) | |||
12492 | << 0 /*self-comparison*/ | |||
12493 | << Result); | |||
12494 | } else if (checkForArray(LHSStripped) && checkForArray(RHSStripped)) { | |||
12495 | // What is it always going to evaluate to? | |||
12496 | unsigned Result; | |||
12497 | switch (Opc) { | |||
12498 | case BO_EQ: // e.g. array1 == array2 | |||
12499 | Result = AlwaysFalse; | |||
12500 | break; | |||
12501 | case BO_NE: // e.g. array1 != array2 | |||
12502 | Result = AlwaysTrue; | |||
12503 | break; | |||
12504 | default: // e.g. array1 <= array2 | |||
12505 | // The best we can say is 'a constant' | |||
12506 | Result = AlwaysConstant; | |||
12507 | break; | |||
12508 | } | |||
12509 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
12510 | S.PDiag(diag::warn_comparison_always) | |||
12511 | << 1 /*array comparison*/ | |||
12512 | << Result); | |||
12513 | } | |||
12514 | } | |||
12515 | ||||
12516 | if (isa<CastExpr>(LHSStripped)) | |||
12517 | LHSStripped = LHSStripped->IgnoreParenCasts(); | |||
12518 | if (isa<CastExpr>(RHSStripped)) | |||
12519 | RHSStripped = RHSStripped->IgnoreParenCasts(); | |||
12520 | ||||
12521 | // Warn about comparisons against a string constant (unless the other | |||
12522 | // operand is null); the user probably wants string comparison function. | |||
12523 | Expr *LiteralString = nullptr; | |||
12524 | Expr *LiteralStringStripped = nullptr; | |||
12525 | if ((isa<StringLiteral>(LHSStripped) || isa<ObjCEncodeExpr>(LHSStripped)) && | |||
12526 | !RHSStripped->isNullPointerConstant(S.Context, | |||
12527 | Expr::NPC_ValueDependentIsNull)) { | |||
12528 | LiteralString = LHS; | |||
12529 | LiteralStringStripped = LHSStripped; | |||
12530 | } else if ((isa<StringLiteral>(RHSStripped) || | |||
12531 | isa<ObjCEncodeExpr>(RHSStripped)) && | |||
12532 | !LHSStripped->isNullPointerConstant(S.Context, | |||
12533 | Expr::NPC_ValueDependentIsNull)) { | |||
12534 | LiteralString = RHS; | |||
12535 | LiteralStringStripped = RHSStripped; | |||
12536 | } | |||
12537 | ||||
12538 | if (LiteralString) { | |||
12539 | S.DiagRuntimeBehavior(Loc, nullptr, | |||
12540 | S.PDiag(diag::warn_stringcompare) | |||
12541 | << isa<ObjCEncodeExpr>(LiteralStringStripped) | |||
12542 | << LiteralString->getSourceRange()); | |||
12543 | } | |||
12544 | } | |||
12545 | ||||
12546 | static ImplicitConversionKind castKindToImplicitConversionKind(CastKind CK) { | |||
12547 | switch (CK) { | |||
12548 | default: { | |||
12549 | #ifndef NDEBUG | |||
12550 | llvm::errs() << "unhandled cast kind: " << CastExpr::getCastKindName(CK) | |||
12551 | << "\n"; | |||
12552 | #endif | |||
12553 | llvm_unreachable("unhandled cast kind")::llvm::llvm_unreachable_internal("unhandled cast kind", "clang/lib/Sema/SemaExpr.cpp" , 12553); | |||
12554 | } | |||
12555 | case CK_UserDefinedConversion: | |||
12556 | return ICK_Identity; | |||
12557 | case CK_LValueToRValue: | |||
12558 | return ICK_Lvalue_To_Rvalue; | |||
12559 | case CK_ArrayToPointerDecay: | |||
12560 | return ICK_Array_To_Pointer; | |||
12561 | case CK_FunctionToPointerDecay: | |||
12562 | return ICK_Function_To_Pointer; | |||
12563 | case CK_IntegralCast: | |||
12564 | return ICK_Integral_Conversion; | |||
12565 | case CK_FloatingCast: | |||
12566 | return ICK_Floating_Conversion; | |||
12567 | case CK_IntegralToFloating: | |||
12568 | case CK_FloatingToIntegral: | |||
12569 | return ICK_Floating_Integral; | |||
12570 | case CK_IntegralComplexCast: | |||
12571 | case CK_FloatingComplexCast: | |||
12572 | case CK_FloatingComplexToIntegralComplex: | |||
12573 | case CK_IntegralComplexToFloatingComplex: | |||
12574 | return ICK_Complex_Conversion; | |||
12575 | case CK_FloatingComplexToReal: | |||
12576 | case CK_FloatingRealToComplex: | |||
12577 | case CK_IntegralComplexToReal: | |||
12578 | case CK_IntegralRealToComplex: | |||
12579 | return ICK_Complex_Real; | |||
12580 | } | |||
12581 | } | |||
12582 | ||||
12583 | static bool checkThreeWayNarrowingConversion(Sema &S, QualType ToType, Expr *E, | |||
12584 | QualType FromType, | |||
12585 | SourceLocation Loc) { | |||
12586 | // Check for a narrowing implicit conversion. | |||
12587 | StandardConversionSequence SCS; | |||
12588 | SCS.setAsIdentityConversion(); | |||
12589 | SCS.setToType(0, FromType); | |||
12590 | SCS.setToType(1, ToType); | |||
12591 | if (const auto *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
12592 | SCS.Second = castKindToImplicitConversionKind(ICE->getCastKind()); | |||
12593 | ||||
12594 | APValue PreNarrowingValue; | |||
12595 | QualType PreNarrowingType; | |||
12596 | switch (SCS.getNarrowingKind(S.Context, E, PreNarrowingValue, | |||
12597 | PreNarrowingType, | |||
12598 | /*IgnoreFloatToIntegralConversion*/ true)) { | |||
12599 | case NK_Dependent_Narrowing: | |||
12600 | // Implicit conversion to a narrower type, but the expression is | |||
12601 | // value-dependent so we can't tell whether it's actually narrowing. | |||
12602 | case NK_Not_Narrowing: | |||
12603 | return false; | |||
12604 | ||||
12605 | case NK_Constant_Narrowing: | |||
12606 | // Implicit conversion to a narrower type, and the value is not a constant | |||
12607 | // expression. | |||
12608 | S.Diag(E->getBeginLoc(), diag::err_spaceship_argument_narrowing) | |||
12609 | << /*Constant*/ 1 | |||
12610 | << PreNarrowingValue.getAsString(S.Context, PreNarrowingType) << ToType; | |||
12611 | return true; | |||
12612 | ||||
12613 | case NK_Variable_Narrowing: | |||
12614 | // Implicit conversion to a narrower type, and the value is not a constant | |||
12615 | // expression. | |||
12616 | case NK_Type_Narrowing: | |||
12617 | S.Diag(E->getBeginLoc(), diag::err_spaceship_argument_narrowing) | |||
12618 | << /*Constant*/ 0 << FromType << ToType; | |||
12619 | // TODO: It's not a constant expression, but what if the user intended it | |||
12620 | // to be? Can we produce notes to help them figure out why it isn't? | |||
12621 | return true; | |||
12622 | } | |||
12623 | llvm_unreachable("unhandled case in switch")::llvm::llvm_unreachable_internal("unhandled case in switch", "clang/lib/Sema/SemaExpr.cpp", 12623); | |||
12624 | } | |||
12625 | ||||
12626 | static QualType checkArithmeticOrEnumeralThreeWayCompare(Sema &S, | |||
12627 | ExprResult &LHS, | |||
12628 | ExprResult &RHS, | |||
12629 | SourceLocation Loc) { | |||
12630 | QualType LHSType = LHS.get()->getType(); | |||
12631 | QualType RHSType = RHS.get()->getType(); | |||
12632 | // Dig out the original argument type and expression before implicit casts | |||
12633 | // were applied. These are the types/expressions we need to check the | |||
12634 | // [expr.spaceship] requirements against. | |||
12635 | ExprResult LHSStripped = LHS.get()->IgnoreParenImpCasts(); | |||
12636 | ExprResult RHSStripped = RHS.get()->IgnoreParenImpCasts(); | |||
12637 | QualType LHSStrippedType = LHSStripped.get()->getType(); | |||
12638 | QualType RHSStrippedType = RHSStripped.get()->getType(); | |||
12639 | ||||
12640 | // C++2a [expr.spaceship]p3: If one of the operands is of type bool and the | |||
12641 | // other is not, the program is ill-formed. | |||
12642 | if (LHSStrippedType->isBooleanType() != RHSStrippedType->isBooleanType()) { | |||
12643 | S.InvalidOperands(Loc, LHSStripped, RHSStripped); | |||
12644 | return QualType(); | |||
12645 | } | |||
12646 | ||||
12647 | // FIXME: Consider combining this with checkEnumArithmeticConversions. | |||
12648 | int NumEnumArgs = (int)LHSStrippedType->isEnumeralType() + | |||
12649 | RHSStrippedType->isEnumeralType(); | |||
12650 | if (NumEnumArgs == 1) { | |||
12651 | bool LHSIsEnum = LHSStrippedType->isEnumeralType(); | |||
12652 | QualType OtherTy = LHSIsEnum ? RHSStrippedType : LHSStrippedType; | |||
12653 | if (OtherTy->hasFloatingRepresentation()) { | |||
12654 | S.InvalidOperands(Loc, LHSStripped, RHSStripped); | |||
12655 | return QualType(); | |||
12656 | } | |||
12657 | } | |||
12658 | if (NumEnumArgs == 2) { | |||
12659 | // C++2a [expr.spaceship]p5: If both operands have the same enumeration | |||
12660 | // type E, the operator yields the result of converting the operands | |||
12661 | // to the underlying type of E and applying <=> to the converted operands. | |||
12662 | if (!S.Context.hasSameUnqualifiedType(LHSStrippedType, RHSStrippedType)) { | |||
12663 | S.InvalidOperands(Loc, LHS, RHS); | |||
12664 | return QualType(); | |||
12665 | } | |||
12666 | QualType IntType = | |||
12667 | LHSStrippedType->castAs<EnumType>()->getDecl()->getIntegerType(); | |||
12668 | assert(IntType->isArithmeticType())(static_cast <bool> (IntType->isArithmeticType()) ? void (0) : __assert_fail ("IntType->isArithmeticType()", "clang/lib/Sema/SemaExpr.cpp" , 12668, __extension__ __PRETTY_FUNCTION__)); | |||
12669 | ||||
12670 | // We can't use `CK_IntegralCast` when the underlying type is 'bool', so we | |||
12671 | // promote the boolean type, and all other promotable integer types, to | |||
12672 | // avoid this. | |||
12673 | if (S.Context.isPromotableIntegerType(IntType)) | |||
12674 | IntType = S.Context.getPromotedIntegerType(IntType); | |||
12675 | ||||
12676 | LHS = S.ImpCastExprToType(LHS.get(), IntType, CK_IntegralCast); | |||
12677 | RHS = S.ImpCastExprToType(RHS.get(), IntType, CK_IntegralCast); | |||
12678 | LHSType = RHSType = IntType; | |||
12679 | } | |||
12680 | ||||
12681 | // C++2a [expr.spaceship]p4: If both operands have arithmetic types, the | |||
12682 | // usual arithmetic conversions are applied to the operands. | |||
12683 | QualType Type = | |||
12684 | S.UsualArithmeticConversions(LHS, RHS, Loc, Sema::ACK_Comparison); | |||
12685 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
12686 | return QualType(); | |||
12687 | if (Type.isNull()) | |||
12688 | return S.InvalidOperands(Loc, LHS, RHS); | |||
12689 | ||||
12690 | std::optional<ComparisonCategoryType> CCT = | |||
12691 | getComparisonCategoryForBuiltinCmp(Type); | |||
12692 | if (!CCT) | |||
12693 | return S.InvalidOperands(Loc, LHS, RHS); | |||
12694 | ||||
12695 | bool HasNarrowing = checkThreeWayNarrowingConversion( | |||
12696 | S, Type, LHS.get(), LHSType, LHS.get()->getBeginLoc()); | |||
12697 | HasNarrowing |= checkThreeWayNarrowingConversion(S, Type, RHS.get(), RHSType, | |||
12698 | RHS.get()->getBeginLoc()); | |||
12699 | if (HasNarrowing) | |||
12700 | return QualType(); | |||
12701 | ||||
12702 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 12702, __extension__ __PRETTY_FUNCTION__ )); | |||
12703 | ||||
12704 | return S.CheckComparisonCategoryType( | |||
12705 | *CCT, Loc, Sema::ComparisonCategoryUsage::OperatorInExpression); | |||
12706 | } | |||
12707 | ||||
12708 | static QualType checkArithmeticOrEnumeralCompare(Sema &S, ExprResult &LHS, | |||
12709 | ExprResult &RHS, | |||
12710 | SourceLocation Loc, | |||
12711 | BinaryOperatorKind Opc) { | |||
12712 | if (Opc == BO_Cmp) | |||
12713 | return checkArithmeticOrEnumeralThreeWayCompare(S, LHS, RHS, Loc); | |||
12714 | ||||
12715 | // C99 6.5.8p3 / C99 6.5.9p4 | |||
12716 | QualType Type = | |||
12717 | S.UsualArithmeticConversions(LHS, RHS, Loc, Sema::ACK_Comparison); | |||
12718 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
12719 | return QualType(); | |||
12720 | if (Type.isNull()) | |||
12721 | return S.InvalidOperands(Loc, LHS, RHS); | |||
12722 | assert(Type->isArithmeticType() || Type->isEnumeralType())(static_cast <bool> (Type->isArithmeticType() || Type ->isEnumeralType()) ? void (0) : __assert_fail ("Type->isArithmeticType() || Type->isEnumeralType()" , "clang/lib/Sema/SemaExpr.cpp", 12722, __extension__ __PRETTY_FUNCTION__ )); | |||
12723 | ||||
12724 | if (Type->isAnyComplexType() && BinaryOperator::isRelationalOp(Opc)) | |||
12725 | return S.InvalidOperands(Loc, LHS, RHS); | |||
12726 | ||||
12727 | // Check for comparisons of floating point operands using != and ==. | |||
12728 | if (Type->hasFloatingRepresentation()) | |||
12729 | S.CheckFloatComparison(Loc, LHS.get(), RHS.get(), Opc); | |||
12730 | ||||
12731 | // The result of comparisons is 'bool' in C++, 'int' in C. | |||
12732 | return S.Context.getLogicalOperationType(); | |||
12733 | } | |||
12734 | ||||
12735 | void Sema::CheckPtrComparisonWithNullChar(ExprResult &E, ExprResult &NullE) { | |||
12736 | if (!NullE.get()->getType()->isAnyPointerType()) | |||
12737 | return; | |||
12738 | int NullValue = PP.isMacroDefined("NULL") ? 0 : 1; | |||
12739 | if (!E.get()->getType()->isAnyPointerType() && | |||
12740 | E.get()->isNullPointerConstant(Context, | |||
12741 | Expr::NPC_ValueDependentIsNotNull) == | |||
12742 | Expr::NPCK_ZeroExpression) { | |||
12743 | if (const auto *CL = dyn_cast<CharacterLiteral>(E.get())) { | |||
12744 | if (CL->getValue() == 0) | |||
12745 | Diag(E.get()->getExprLoc(), diag::warn_pointer_compare) | |||
12746 | << NullValue | |||
12747 | << FixItHint::CreateReplacement(E.get()->getExprLoc(), | |||
12748 | NullValue ? "NULL" : "(void *)0"); | |||
12749 | } else if (const auto *CE = dyn_cast<CStyleCastExpr>(E.get())) { | |||
12750 | TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); | |||
12751 | QualType T = Context.getCanonicalType(TI->getType()).getUnqualifiedType(); | |||
12752 | if (T == Context.CharTy) | |||
12753 | Diag(E.get()->getExprLoc(), diag::warn_pointer_compare) | |||
12754 | << NullValue | |||
12755 | << FixItHint::CreateReplacement(E.get()->getExprLoc(), | |||
12756 | NullValue ? "NULL" : "(void *)0"); | |||
12757 | } | |||
12758 | } | |||
12759 | } | |||
12760 | ||||
12761 | // C99 6.5.8, C++ [expr.rel] | |||
12762 | QualType Sema::CheckCompareOperands(ExprResult &LHS, ExprResult &RHS, | |||
12763 | SourceLocation Loc, | |||
12764 | BinaryOperatorKind Opc) { | |||
12765 | bool IsRelational = BinaryOperator::isRelationalOp(Opc); | |||
12766 | bool IsThreeWay = Opc == BO_Cmp; | |||
12767 | bool IsOrdered = IsRelational || IsThreeWay; | |||
12768 | auto IsAnyPointerType = [](ExprResult E) { | |||
12769 | QualType Ty = E.get()->getType(); | |||
12770 | return Ty->isPointerType() || Ty->isMemberPointerType(); | |||
12771 | }; | |||
12772 | ||||
12773 | // C++2a [expr.spaceship]p6: If at least one of the operands is of pointer | |||
12774 | // type, array-to-pointer, ..., conversions are performed on both operands to | |||
12775 | // bring them to their composite type. | |||
12776 | // Otherwise, all comparisons expect an rvalue, so convert to rvalue before | |||
12777 | // any type-related checks. | |||
12778 | if (!IsThreeWay || IsAnyPointerType(LHS) || IsAnyPointerType(RHS)) { | |||
12779 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
12780 | if (LHS.isInvalid()) | |||
12781 | return QualType(); | |||
12782 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
12783 | if (RHS.isInvalid()) | |||
12784 | return QualType(); | |||
12785 | } else { | |||
12786 | LHS = DefaultLvalueConversion(LHS.get()); | |||
12787 | if (LHS.isInvalid()) | |||
12788 | return QualType(); | |||
12789 | RHS = DefaultLvalueConversion(RHS.get()); | |||
12790 | if (RHS.isInvalid()) | |||
12791 | return QualType(); | |||
12792 | } | |||
12793 | ||||
12794 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/true); | |||
12795 | if (!getLangOpts().CPlusPlus && BinaryOperator::isEqualityOp(Opc)) { | |||
12796 | CheckPtrComparisonWithNullChar(LHS, RHS); | |||
12797 | CheckPtrComparisonWithNullChar(RHS, LHS); | |||
12798 | } | |||
12799 | ||||
12800 | // Handle vector comparisons separately. | |||
12801 | if (LHS.get()->getType()->isVectorType() || | |||
12802 | RHS.get()->getType()->isVectorType()) | |||
12803 | return CheckVectorCompareOperands(LHS, RHS, Loc, Opc); | |||
12804 | ||||
12805 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
12806 | RHS.get()->getType()->isVLSTBuiltinType()) | |||
12807 | return CheckSizelessVectorCompareOperands(LHS, RHS, Loc, Opc); | |||
12808 | ||||
12809 | diagnoseLogicalNotOnLHSofCheck(*this, LHS, RHS, Loc, Opc); | |||
12810 | diagnoseTautologicalComparison(*this, Loc, LHS.get(), RHS.get(), Opc); | |||
12811 | ||||
12812 | QualType LHSType = LHS.get()->getType(); | |||
12813 | QualType RHSType = RHS.get()->getType(); | |||
12814 | if ((LHSType->isArithmeticType() || LHSType->isEnumeralType()) && | |||
12815 | (RHSType->isArithmeticType() || RHSType->isEnumeralType())) | |||
12816 | return checkArithmeticOrEnumeralCompare(*this, LHS, RHS, Loc, Opc); | |||
12817 | ||||
12818 | const Expr::NullPointerConstantKind LHSNullKind = | |||
12819 | LHS.get()->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull); | |||
12820 | const Expr::NullPointerConstantKind RHSNullKind = | |||
12821 | RHS.get()->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull); | |||
12822 | bool LHSIsNull = LHSNullKind != Expr::NPCK_NotNull; | |||
12823 | bool RHSIsNull = RHSNullKind != Expr::NPCK_NotNull; | |||
12824 | ||||
12825 | auto computeResultTy = [&]() { | |||
12826 | if (Opc != BO_Cmp) | |||
12827 | return Context.getLogicalOperationType(); | |||
12828 | assert(getLangOpts().CPlusPlus)(static_cast <bool> (getLangOpts().CPlusPlus) ? void (0 ) : __assert_fail ("getLangOpts().CPlusPlus", "clang/lib/Sema/SemaExpr.cpp" , 12828, __extension__ __PRETTY_FUNCTION__)); | |||
12829 | 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())" , "clang/lib/Sema/SemaExpr.cpp", 12829, __extension__ __PRETTY_FUNCTION__ )); | |||
12830 | ||||
12831 | QualType CompositeTy = LHS.get()->getType(); | |||
12832 | assert(!CompositeTy->isReferenceType())(static_cast <bool> (!CompositeTy->isReferenceType() ) ? void (0) : __assert_fail ("!CompositeTy->isReferenceType()" , "clang/lib/Sema/SemaExpr.cpp", 12832, __extension__ __PRETTY_FUNCTION__ )); | |||
12833 | ||||
12834 | std::optional<ComparisonCategoryType> CCT = | |||
12835 | getComparisonCategoryForBuiltinCmp(CompositeTy); | |||
12836 | if (!CCT) | |||
12837 | return InvalidOperands(Loc, LHS, RHS); | |||
12838 | ||||
12839 | if (CompositeTy->isPointerType() && LHSIsNull != RHSIsNull) { | |||
12840 | // P0946R0: Comparisons between a null pointer constant and an object | |||
12841 | // pointer result in std::strong_equality, which is ill-formed under | |||
12842 | // P1959R0. | |||
12843 | Diag(Loc, diag::err_typecheck_three_way_comparison_of_pointer_and_zero) | |||
12844 | << (LHSIsNull ? LHS.get()->getSourceRange() | |||
12845 | : RHS.get()->getSourceRange()); | |||
12846 | return QualType(); | |||
12847 | } | |||
12848 | ||||
12849 | return CheckComparisonCategoryType( | |||
12850 | *CCT, Loc, ComparisonCategoryUsage::OperatorInExpression); | |||
12851 | }; | |||
12852 | ||||
12853 | if (!IsOrdered && LHSIsNull != RHSIsNull) { | |||
12854 | bool IsEquality = Opc == BO_EQ; | |||
12855 | if (RHSIsNull) | |||
12856 | DiagnoseAlwaysNonNullPointer(LHS.get(), RHSNullKind, IsEquality, | |||
12857 | RHS.get()->getSourceRange()); | |||
12858 | else | |||
12859 | DiagnoseAlwaysNonNullPointer(RHS.get(), LHSNullKind, IsEquality, | |||
12860 | LHS.get()->getSourceRange()); | |||
12861 | } | |||
12862 | ||||
12863 | if (IsOrdered && LHSType->isFunctionPointerType() && | |||
12864 | RHSType->isFunctionPointerType()) { | |||
12865 | // Valid unless a relational comparison of function pointers | |||
12866 | bool IsError = Opc == BO_Cmp; | |||
12867 | auto DiagID = | |||
12868 | IsError ? diag::err_typecheck_ordered_comparison_of_function_pointers | |||
12869 | : getLangOpts().CPlusPlus | |||
12870 | ? diag::warn_typecheck_ordered_comparison_of_function_pointers | |||
12871 | : diag::ext_typecheck_ordered_comparison_of_function_pointers; | |||
12872 | Diag(Loc, DiagID) << LHSType << RHSType << LHS.get()->getSourceRange() | |||
12873 | << RHS.get()->getSourceRange(); | |||
12874 | if (IsError) | |||
12875 | return QualType(); | |||
12876 | } | |||
12877 | ||||
12878 | if ((LHSType->isIntegerType() && !LHSIsNull) || | |||
12879 | (RHSType->isIntegerType() && !RHSIsNull)) { | |||
12880 | // Skip normal pointer conversion checks in this case; we have better | |||
12881 | // diagnostics for this below. | |||
12882 | } else if (getLangOpts().CPlusPlus) { | |||
12883 | // Equality comparison of a function pointer to a void pointer is invalid, | |||
12884 | // but we allow it as an extension. | |||
12885 | // FIXME: If we really want to allow this, should it be part of composite | |||
12886 | // pointer type computation so it works in conditionals too? | |||
12887 | if (!IsOrdered && | |||
12888 | ((LHSType->isFunctionPointerType() && RHSType->isVoidPointerType()) || | |||
12889 | (RHSType->isFunctionPointerType() && LHSType->isVoidPointerType()))) { | |||
12890 | // This is a gcc extension compatibility comparison. | |||
12891 | // In a SFINAE context, we treat this as a hard error to maintain | |||
12892 | // conformance with the C++ standard. | |||
12893 | diagnoseFunctionPointerToVoidComparison( | |||
12894 | *this, Loc, LHS, RHS, /*isError*/ (bool)isSFINAEContext()); | |||
12895 | ||||
12896 | if (isSFINAEContext()) | |||
12897 | return QualType(); | |||
12898 | ||||
12899 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
12900 | return computeResultTy(); | |||
12901 | } | |||
12902 | ||||
12903 | // C++ [expr.eq]p2: | |||
12904 | // If at least one operand is a pointer [...] bring them to their | |||
12905 | // composite pointer type. | |||
12906 | // C++ [expr.spaceship]p6 | |||
12907 | // If at least one of the operands is of pointer type, [...] bring them | |||
12908 | // to their composite pointer type. | |||
12909 | // C++ [expr.rel]p2: | |||
12910 | // If both operands are pointers, [...] bring them to their composite | |||
12911 | // pointer type. | |||
12912 | // For <=>, the only valid non-pointer types are arrays and functions, and | |||
12913 | // we already decayed those, so this is really the same as the relational | |||
12914 | // comparison rule. | |||
12915 | if ((int)LHSType->isPointerType() + (int)RHSType->isPointerType() >= | |||
12916 | (IsOrdered ? 2 : 1) && | |||
12917 | (!LangOpts.ObjCAutoRefCount || !(LHSType->isObjCObjectPointerType() || | |||
12918 | RHSType->isObjCObjectPointerType()))) { | |||
12919 | if (convertPointersToCompositeType(*this, Loc, LHS, RHS)) | |||
12920 | return QualType(); | |||
12921 | return computeResultTy(); | |||
12922 | } | |||
12923 | } else if (LHSType->isPointerType() && | |||
12924 | RHSType->isPointerType()) { // C99 6.5.8p2 | |||
12925 | // All of the following pointer-related warnings are GCC extensions, except | |||
12926 | // when handling null pointer constants. | |||
12927 | QualType LCanPointeeTy = | |||
12928 | LHSType->castAs<PointerType>()->getPointeeType().getCanonicalType(); | |||
12929 | QualType RCanPointeeTy = | |||
12930 | RHSType->castAs<PointerType>()->getPointeeType().getCanonicalType(); | |||
12931 | ||||
12932 | // C99 6.5.9p2 and C99 6.5.8p2 | |||
12933 | if (Context.typesAreCompatible(LCanPointeeTy.getUnqualifiedType(), | |||
12934 | RCanPointeeTy.getUnqualifiedType())) { | |||
12935 | if (IsRelational) { | |||
12936 | // Pointers both need to point to complete or incomplete types | |||
12937 | if ((LCanPointeeTy->isIncompleteType() != | |||
12938 | RCanPointeeTy->isIncompleteType()) && | |||
12939 | !getLangOpts().C11) { | |||
12940 | Diag(Loc, diag::ext_typecheck_compare_complete_incomplete_pointers) | |||
12941 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange() | |||
12942 | << LHSType << RHSType << LCanPointeeTy->isIncompleteType() | |||
12943 | << RCanPointeeTy->isIncompleteType(); | |||
12944 | } | |||
12945 | } | |||
12946 | } else if (!IsRelational && | |||
12947 | (LCanPointeeTy->isVoidType() || RCanPointeeTy->isVoidType())) { | |||
12948 | // Valid unless comparison between non-null pointer and function pointer | |||
12949 | if ((LCanPointeeTy->isFunctionType() || RCanPointeeTy->isFunctionType()) | |||
12950 | && !LHSIsNull && !RHSIsNull) | |||
12951 | diagnoseFunctionPointerToVoidComparison(*this, Loc, LHS, RHS, | |||
12952 | /*isError*/false); | |||
12953 | } else { | |||
12954 | // Invalid | |||
12955 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, /*isError*/false); | |||
12956 | } | |||
12957 | if (LCanPointeeTy != RCanPointeeTy) { | |||
12958 | // Treat NULL constant as a special case in OpenCL. | |||
12959 | if (getLangOpts().OpenCL && !LHSIsNull && !RHSIsNull) { | |||
12960 | if (!LCanPointeeTy.isAddressSpaceOverlapping(RCanPointeeTy)) { | |||
12961 | Diag(Loc, | |||
12962 | diag::err_typecheck_op_on_nonoverlapping_address_space_pointers) | |||
12963 | << LHSType << RHSType << 0 /* comparison */ | |||
12964 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); | |||
12965 | } | |||
12966 | } | |||
12967 | LangAS AddrSpaceL = LCanPointeeTy.getAddressSpace(); | |||
12968 | LangAS AddrSpaceR = RCanPointeeTy.getAddressSpace(); | |||
12969 | CastKind Kind = AddrSpaceL != AddrSpaceR ? CK_AddressSpaceConversion | |||
12970 | : CK_BitCast; | |||
12971 | if (LHSIsNull && !RHSIsNull) | |||
12972 | LHS = ImpCastExprToType(LHS.get(), RHSType, Kind); | |||
12973 | else | |||
12974 | RHS = ImpCastExprToType(RHS.get(), LHSType, Kind); | |||
12975 | } | |||
12976 | return computeResultTy(); | |||
12977 | } | |||
12978 | ||||
12979 | ||||
12980 | // C++ [expr.eq]p4: | |||
12981 | // Two operands of type std::nullptr_t or one operand of type | |||
12982 | // std::nullptr_t and the other a null pointer constant compare | |||
12983 | // equal. | |||
12984 | // C2x 6.5.9p5: | |||
12985 | // If both operands have type nullptr_t or one operand has type nullptr_t | |||
12986 | // and the other is a null pointer constant, they compare equal. | |||
12987 | if (!IsOrdered && LHSIsNull && RHSIsNull) { | |||
12988 | if (LHSType->isNullPtrType()) { | |||
12989 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
12990 | return computeResultTy(); | |||
12991 | } | |||
12992 | if (RHSType->isNullPtrType()) { | |||
12993 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
12994 | return computeResultTy(); | |||
12995 | } | |||
12996 | } | |||
12997 | ||||
12998 | if (!getLangOpts().CPlusPlus && !IsOrdered && (LHSIsNull || RHSIsNull)) { | |||
12999 | // C2x 6.5.9p6: | |||
13000 | // Otherwise, at least one operand is a pointer. If one is a pointer and | |||
13001 | // the other is a null pointer constant, the null pointer constant is | |||
13002 | // converted to the type of the pointer. | |||
13003 | if (LHSIsNull && RHSType->isPointerType()) { | |||
13004 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
13005 | return computeResultTy(); | |||
13006 | } | |||
13007 | if (RHSIsNull && LHSType->isPointerType()) { | |||
13008 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
13009 | return computeResultTy(); | |||
13010 | } | |||
13011 | } | |||
13012 | ||||
13013 | // Comparison of Objective-C pointers and block pointers against nullptr_t. | |||
13014 | // These aren't covered by the composite pointer type rules. | |||
13015 | if (!IsOrdered && RHSType->isNullPtrType() && | |||
13016 | (LHSType->isObjCObjectPointerType() || LHSType->isBlockPointerType())) { | |||
13017 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
13018 | return computeResultTy(); | |||
13019 | } | |||
13020 | if (!IsOrdered && LHSType->isNullPtrType() && | |||
13021 | (RHSType->isObjCObjectPointerType() || RHSType->isBlockPointerType())) { | |||
13022 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
13023 | return computeResultTy(); | |||
13024 | } | |||
13025 | ||||
13026 | if (getLangOpts().CPlusPlus) { | |||
13027 | if (IsRelational && | |||
13028 | ((LHSType->isNullPtrType() && RHSType->isPointerType()) || | |||
13029 | (RHSType->isNullPtrType() && LHSType->isPointerType()))) { | |||
13030 | // HACK: Relational comparison of nullptr_t against a pointer type is | |||
13031 | // invalid per DR583, but we allow it within std::less<> and friends, | |||
13032 | // since otherwise common uses of it break. | |||
13033 | // FIXME: Consider removing this hack once LWG fixes std::less<> and | |||
13034 | // friends to have std::nullptr_t overload candidates. | |||
13035 | DeclContext *DC = CurContext; | |||
13036 | if (isa<FunctionDecl>(DC)) | |||
13037 | DC = DC->getParent(); | |||
13038 | if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(DC)) { | |||
13039 | if (CTSD->isInStdNamespace() && | |||
13040 | llvm::StringSwitch<bool>(CTSD->getName()) | |||
13041 | .Cases("less", "less_equal", "greater", "greater_equal", true) | |||
13042 | .Default(false)) { | |||
13043 | if (RHSType->isNullPtrType()) | |||
13044 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
13045 | else | |||
13046 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
13047 | return computeResultTy(); | |||
13048 | } | |||
13049 | } | |||
13050 | } | |||
13051 | ||||
13052 | // C++ [expr.eq]p2: | |||
13053 | // If at least one operand is a pointer to member, [...] bring them to | |||
13054 | // their composite pointer type. | |||
13055 | if (!IsOrdered && | |||
13056 | (LHSType->isMemberPointerType() || RHSType->isMemberPointerType())) { | |||
13057 | if (convertPointersToCompositeType(*this, Loc, LHS, RHS)) | |||
13058 | return QualType(); | |||
13059 | else | |||
13060 | return computeResultTy(); | |||
13061 | } | |||
13062 | } | |||
13063 | ||||
13064 | // Handle block pointer types. | |||
13065 | if (!IsOrdered && LHSType->isBlockPointerType() && | |||
13066 | RHSType->isBlockPointerType()) { | |||
13067 | QualType lpointee = LHSType->castAs<BlockPointerType>()->getPointeeType(); | |||
13068 | QualType rpointee = RHSType->castAs<BlockPointerType>()->getPointeeType(); | |||
13069 | ||||
13070 | if (!LHSIsNull && !RHSIsNull && | |||
13071 | !Context.typesAreCompatible(lpointee, rpointee)) { | |||
13072 | Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks) | |||
13073 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
13074 | << RHS.get()->getSourceRange(); | |||
13075 | } | |||
13076 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
13077 | return computeResultTy(); | |||
13078 | } | |||
13079 | ||||
13080 | // Allow block pointers to be compared with null pointer constants. | |||
13081 | if (!IsOrdered | |||
13082 | && ((LHSType->isBlockPointerType() && RHSType->isPointerType()) | |||
13083 | || (LHSType->isPointerType() && RHSType->isBlockPointerType()))) { | |||
13084 | if (!LHSIsNull && !RHSIsNull) { | |||
13085 | if (!((RHSType->isPointerType() && RHSType->castAs<PointerType>() | |||
13086 | ->getPointeeType()->isVoidType()) | |||
13087 | || (LHSType->isPointerType() && LHSType->castAs<PointerType>() | |||
13088 | ->getPointeeType()->isVoidType()))) | |||
13089 | Diag(Loc, diag::err_typecheck_comparison_of_distinct_blocks) | |||
13090 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
13091 | << RHS.get()->getSourceRange(); | |||
13092 | } | |||
13093 | if (LHSIsNull && !RHSIsNull) | |||
13094 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
13095 | RHSType->isPointerType() ? CK_BitCast | |||
13096 | : CK_AnyPointerToBlockPointerCast); | |||
13097 | else | |||
13098 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
13099 | LHSType->isPointerType() ? CK_BitCast | |||
13100 | : CK_AnyPointerToBlockPointerCast); | |||
13101 | return computeResultTy(); | |||
13102 | } | |||
13103 | ||||
13104 | if (LHSType->isObjCObjectPointerType() || | |||
13105 | RHSType->isObjCObjectPointerType()) { | |||
13106 | const PointerType *LPT = LHSType->getAs<PointerType>(); | |||
13107 | const PointerType *RPT = RHSType->getAs<PointerType>(); | |||
13108 | if (LPT || RPT) { | |||
13109 | bool LPtrToVoid = LPT ? LPT->getPointeeType()->isVoidType() : false; | |||
13110 | bool RPtrToVoid = RPT ? RPT->getPointeeType()->isVoidType() : false; | |||
13111 | ||||
13112 | if (!LPtrToVoid && !RPtrToVoid && | |||
13113 | !Context.typesAreCompatible(LHSType, RHSType)) { | |||
13114 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, | |||
13115 | /*isError*/false); | |||
13116 | } | |||
13117 | // FIXME: If LPtrToVoid, we should presumably convert the LHS rather than | |||
13118 | // the RHS, but we have test coverage for this behavior. | |||
13119 | // FIXME: Consider using convertPointersToCompositeType in C++. | |||
13120 | if (LHSIsNull && !RHSIsNull) { | |||
13121 | Expr *E = LHS.get(); | |||
13122 | if (getLangOpts().ObjCAutoRefCount) | |||
13123 | CheckObjCConversion(SourceRange(), RHSType, E, | |||
13124 | CCK_ImplicitConversion); | |||
13125 | LHS = ImpCastExprToType(E, RHSType, | |||
13126 | RPT ? CK_BitCast :CK_CPointerToObjCPointerCast); | |||
13127 | } | |||
13128 | else { | |||
13129 | Expr *E = RHS.get(); | |||
13130 | if (getLangOpts().ObjCAutoRefCount) | |||
13131 | CheckObjCConversion(SourceRange(), LHSType, E, CCK_ImplicitConversion, | |||
13132 | /*Diagnose=*/true, | |||
13133 | /*DiagnoseCFAudited=*/false, Opc); | |||
13134 | RHS = ImpCastExprToType(E, LHSType, | |||
13135 | LPT ? CK_BitCast :CK_CPointerToObjCPointerCast); | |||
13136 | } | |||
13137 | return computeResultTy(); | |||
13138 | } | |||
13139 | if (LHSType->isObjCObjectPointerType() && | |||
13140 | RHSType->isObjCObjectPointerType()) { | |||
13141 | if (!Context.areComparableObjCPointerTypes(LHSType, RHSType)) | |||
13142 | diagnoseDistinctPointerComparison(*this, Loc, LHS, RHS, | |||
13143 | /*isError*/false); | |||
13144 | if (isObjCObjectLiteral(LHS) || isObjCObjectLiteral(RHS)) | |||
13145 | diagnoseObjCLiteralComparison(*this, Loc, LHS, RHS, Opc); | |||
13146 | ||||
13147 | if (LHSIsNull && !RHSIsNull) | |||
13148 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_BitCast); | |||
13149 | else | |||
13150 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_BitCast); | |||
13151 | return computeResultTy(); | |||
13152 | } | |||
13153 | ||||
13154 | if (!IsOrdered && LHSType->isBlockPointerType() && | |||
13155 | RHSType->isBlockCompatibleObjCPointerType(Context)) { | |||
13156 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
13157 | CK_BlockPointerToObjCPointerCast); | |||
13158 | return computeResultTy(); | |||
13159 | } else if (!IsOrdered && | |||
13160 | LHSType->isBlockCompatibleObjCPointerType(Context) && | |||
13161 | RHSType->isBlockPointerType()) { | |||
13162 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
13163 | CK_BlockPointerToObjCPointerCast); | |||
13164 | return computeResultTy(); | |||
13165 | } | |||
13166 | } | |||
13167 | if ((LHSType->isAnyPointerType() && RHSType->isIntegerType()) || | |||
13168 | (LHSType->isIntegerType() && RHSType->isAnyPointerType())) { | |||
13169 | unsigned DiagID = 0; | |||
13170 | bool isError = false; | |||
13171 | if (LangOpts.DebuggerSupport) { | |||
13172 | // Under a debugger, allow the comparison of pointers to integers, | |||
13173 | // since users tend to want to compare addresses. | |||
13174 | } else if ((LHSIsNull && LHSType->isIntegerType()) || | |||
13175 | (RHSIsNull && RHSType->isIntegerType())) { | |||
13176 | if (IsOrdered) { | |||
13177 | isError = getLangOpts().CPlusPlus; | |||
13178 | DiagID = | |||
13179 | isError ? diag::err_typecheck_ordered_comparison_of_pointer_and_zero | |||
13180 | : diag::ext_typecheck_ordered_comparison_of_pointer_and_zero; | |||
13181 | } | |||
13182 | } else if (getLangOpts().CPlusPlus) { | |||
13183 | DiagID = diag::err_typecheck_comparison_of_pointer_integer; | |||
13184 | isError = true; | |||
13185 | } else if (IsOrdered) | |||
13186 | DiagID = diag::ext_typecheck_ordered_comparison_of_pointer_integer; | |||
13187 | else | |||
13188 | DiagID = diag::ext_typecheck_comparison_of_pointer_integer; | |||
13189 | ||||
13190 | if (DiagID) { | |||
13191 | Diag(Loc, DiagID) | |||
13192 | << LHSType << RHSType << LHS.get()->getSourceRange() | |||
13193 | << RHS.get()->getSourceRange(); | |||
13194 | if (isError) | |||
13195 | return QualType(); | |||
13196 | } | |||
13197 | ||||
13198 | if (LHSType->isIntegerType()) | |||
13199 | LHS = ImpCastExprToType(LHS.get(), RHSType, | |||
13200 | LHSIsNull ? CK_NullToPointer : CK_IntegralToPointer); | |||
13201 | else | |||
13202 | RHS = ImpCastExprToType(RHS.get(), LHSType, | |||
13203 | RHSIsNull ? CK_NullToPointer : CK_IntegralToPointer); | |||
13204 | return computeResultTy(); | |||
13205 | } | |||
13206 | ||||
13207 | // Handle block pointers. | |||
13208 | if (!IsOrdered && RHSIsNull | |||
13209 | && LHSType->isBlockPointerType() && RHSType->isIntegerType()) { | |||
13210 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
13211 | return computeResultTy(); | |||
13212 | } | |||
13213 | if (!IsOrdered && LHSIsNull | |||
13214 | && LHSType->isIntegerType() && RHSType->isBlockPointerType()) { | |||
13215 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
13216 | return computeResultTy(); | |||
13217 | } | |||
13218 | ||||
13219 | if (getLangOpts().getOpenCLCompatibleVersion() >= 200) { | |||
13220 | if (LHSType->isClkEventT() && RHSType->isClkEventT()) { | |||
13221 | return computeResultTy(); | |||
13222 | } | |||
13223 | ||||
13224 | if (LHSType->isQueueT() && RHSType->isQueueT()) { | |||
13225 | return computeResultTy(); | |||
13226 | } | |||
13227 | ||||
13228 | if (LHSIsNull && RHSType->isQueueT()) { | |||
13229 | LHS = ImpCastExprToType(LHS.get(), RHSType, CK_NullToPointer); | |||
13230 | return computeResultTy(); | |||
13231 | } | |||
13232 | ||||
13233 | if (LHSType->isQueueT() && RHSIsNull) { | |||
13234 | RHS = ImpCastExprToType(RHS.get(), LHSType, CK_NullToPointer); | |||
13235 | return computeResultTy(); | |||
13236 | } | |||
13237 | } | |||
13238 | ||||
13239 | return InvalidOperands(Loc, LHS, RHS); | |||
13240 | } | |||
13241 | ||||
13242 | // Return a signed ext_vector_type that is of identical size and number of | |||
13243 | // elements. For floating point vectors, return an integer type of identical | |||
13244 | // size and number of elements. In the non ext_vector_type case, search from | |||
13245 | // the largest type to the smallest type to avoid cases where long long == long, | |||
13246 | // where long gets picked over long long. | |||
13247 | QualType Sema::GetSignedVectorType(QualType V) { | |||
13248 | const VectorType *VTy = V->castAs<VectorType>(); | |||
13249 | unsigned TypeSize = Context.getTypeSize(VTy->getElementType()); | |||
13250 | ||||
13251 | if (isa<ExtVectorType>(VTy)) { | |||
13252 | if (VTy->isExtVectorBoolType()) | |||
13253 | return Context.getExtVectorType(Context.BoolTy, VTy->getNumElements()); | |||
13254 | if (TypeSize == Context.getTypeSize(Context.CharTy)) | |||
13255 | return Context.getExtVectorType(Context.CharTy, VTy->getNumElements()); | |||
13256 | if (TypeSize == Context.getTypeSize(Context.ShortTy)) | |||
13257 | return Context.getExtVectorType(Context.ShortTy, VTy->getNumElements()); | |||
13258 | if (TypeSize == Context.getTypeSize(Context.IntTy)) | |||
13259 | return Context.getExtVectorType(Context.IntTy, VTy->getNumElements()); | |||
13260 | if (TypeSize == Context.getTypeSize(Context.Int128Ty)) | |||
13261 | return Context.getExtVectorType(Context.Int128Ty, VTy->getNumElements()); | |||
13262 | if (TypeSize == Context.getTypeSize(Context.LongTy)) | |||
13263 | return Context.getExtVectorType(Context.LongTy, VTy->getNumElements()); | |||
13264 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 13265, __extension__ __PRETTY_FUNCTION__ )) | |||
13265 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 13265, __extension__ __PRETTY_FUNCTION__ )); | |||
13266 | return Context.getExtVectorType(Context.LongLongTy, VTy->getNumElements()); | |||
13267 | } | |||
13268 | ||||
13269 | if (TypeSize == Context.getTypeSize(Context.Int128Ty)) | |||
13270 | return Context.getVectorType(Context.Int128Ty, VTy->getNumElements(), | |||
13271 | VectorType::GenericVector); | |||
13272 | if (TypeSize == Context.getTypeSize(Context.LongLongTy)) | |||
13273 | return Context.getVectorType(Context.LongLongTy, VTy->getNumElements(), | |||
13274 | VectorType::GenericVector); | |||
13275 | if (TypeSize == Context.getTypeSize(Context.LongTy)) | |||
13276 | return Context.getVectorType(Context.LongTy, VTy->getNumElements(), | |||
13277 | VectorType::GenericVector); | |||
13278 | if (TypeSize == Context.getTypeSize(Context.IntTy)) | |||
13279 | return Context.getVectorType(Context.IntTy, VTy->getNumElements(), | |||
13280 | VectorType::GenericVector); | |||
13281 | if (TypeSize == Context.getTypeSize(Context.ShortTy)) | |||
13282 | return Context.getVectorType(Context.ShortTy, VTy->getNumElements(), | |||
13283 | VectorType::GenericVector); | |||
13284 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 13285, __extension__ __PRETTY_FUNCTION__ )) | |||
13285 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 13285, __extension__ __PRETTY_FUNCTION__ )); | |||
13286 | return Context.getVectorType(Context.CharTy, VTy->getNumElements(), | |||
13287 | VectorType::GenericVector); | |||
13288 | } | |||
13289 | ||||
13290 | QualType Sema::GetSignedSizelessVectorType(QualType V) { | |||
13291 | const BuiltinType *VTy = V->castAs<BuiltinType>(); | |||
13292 | assert(VTy->isSizelessBuiltinType() && "expected sizeless type")(static_cast <bool> (VTy->isSizelessBuiltinType() && "expected sizeless type") ? void (0) : __assert_fail ("VTy->isSizelessBuiltinType() && \"expected sizeless type\"" , "clang/lib/Sema/SemaExpr.cpp", 13292, __extension__ __PRETTY_FUNCTION__ )); | |||
13293 | ||||
13294 | const QualType ETy = V->getSveEltType(Context); | |||
13295 | const auto TypeSize = Context.getTypeSize(ETy); | |||
13296 | ||||
13297 | const QualType IntTy = Context.getIntTypeForBitwidth(TypeSize, true); | |||
13298 | const llvm::ElementCount VecSize = Context.getBuiltinVectorTypeInfo(VTy).EC; | |||
13299 | return Context.getScalableVectorType(IntTy, VecSize.getKnownMinValue()); | |||
13300 | } | |||
13301 | ||||
13302 | /// CheckVectorCompareOperands - vector comparisons are a clang extension that | |||
13303 | /// operates on extended vector types. Instead of producing an IntTy result, | |||
13304 | /// like a scalar comparison, a vector comparison produces a vector of integer | |||
13305 | /// types. | |||
13306 | QualType Sema::CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, | |||
13307 | SourceLocation Loc, | |||
13308 | BinaryOperatorKind Opc) { | |||
13309 | if (Opc == BO_Cmp) { | |||
13310 | Diag(Loc, diag::err_three_way_vector_comparison); | |||
13311 | return QualType(); | |||
13312 | } | |||
13313 | ||||
13314 | // Check to make sure we're operating on vectors of the same type and width, | |||
13315 | // Allowing one side to be a scalar of element type. | |||
13316 | QualType vType = | |||
13317 | CheckVectorOperands(LHS, RHS, Loc, /*isCompAssign*/ false, | |||
13318 | /*AllowBothBool*/ true, | |||
13319 | /*AllowBoolConversions*/ getLangOpts().ZVector, | |||
13320 | /*AllowBooleanOperation*/ true, | |||
13321 | /*ReportInvalid*/ true); | |||
13322 | if (vType.isNull()) | |||
13323 | return vType; | |||
13324 | ||||
13325 | QualType LHSType = LHS.get()->getType(); | |||
13326 | ||||
13327 | // Determine the return type of a vector compare. By default clang will return | |||
13328 | // a scalar for all vector compares except vector bool and vector pixel. | |||
13329 | // With the gcc compiler we will always return a vector type and with the xl | |||
13330 | // compiler we will always return a scalar type. This switch allows choosing | |||
13331 | // which behavior is prefered. | |||
13332 | if (getLangOpts().AltiVec) { | |||
13333 | switch (getLangOpts().getAltivecSrcCompat()) { | |||
13334 | case LangOptions::AltivecSrcCompatKind::Mixed: | |||
13335 | // If AltiVec, the comparison results in a numeric type, i.e. | |||
13336 | // bool for C++, int for C | |||
13337 | if (vType->castAs<VectorType>()->getVectorKind() == | |||
13338 | VectorType::AltiVecVector) | |||
13339 | return Context.getLogicalOperationType(); | |||
13340 | else | |||
13341 | Diag(Loc, diag::warn_deprecated_altivec_src_compat); | |||
13342 | break; | |||
13343 | case LangOptions::AltivecSrcCompatKind::GCC: | |||
13344 | // For GCC we always return the vector type. | |||
13345 | break; | |||
13346 | case LangOptions::AltivecSrcCompatKind::XL: | |||
13347 | return Context.getLogicalOperationType(); | |||
13348 | break; | |||
13349 | } | |||
13350 | } | |||
13351 | ||||
13352 | // For non-floating point types, check for self-comparisons of the form | |||
13353 | // x == x, x != x, x < x, etc. These always evaluate to a constant, and | |||
13354 | // often indicate logic errors in the program. | |||
13355 | diagnoseTautologicalComparison(*this, Loc, LHS.get(), RHS.get(), Opc); | |||
13356 | ||||
13357 | // Check for comparisons of floating point operands using != and ==. | |||
13358 | if (LHSType->hasFloatingRepresentation()) { | |||
13359 | assert(RHS.get()->getType()->hasFloatingRepresentation())(static_cast <bool> (RHS.get()->getType()->hasFloatingRepresentation ()) ? void (0) : __assert_fail ("RHS.get()->getType()->hasFloatingRepresentation()" , "clang/lib/Sema/SemaExpr.cpp", 13359, __extension__ __PRETTY_FUNCTION__ )); | |||
13360 | CheckFloatComparison(Loc, LHS.get(), RHS.get(), Opc); | |||
13361 | } | |||
13362 | ||||
13363 | // Return a signed type for the vector. | |||
13364 | return GetSignedVectorType(vType); | |||
13365 | } | |||
13366 | ||||
13367 | QualType Sema::CheckSizelessVectorCompareOperands(ExprResult &LHS, | |||
13368 | ExprResult &RHS, | |||
13369 | SourceLocation Loc, | |||
13370 | BinaryOperatorKind Opc) { | |||
13371 | if (Opc == BO_Cmp) { | |||
13372 | Diag(Loc, diag::err_three_way_vector_comparison); | |||
13373 | return QualType(); | |||
13374 | } | |||
13375 | ||||
13376 | // Check to make sure we're operating on vectors of the same type and width, | |||
13377 | // Allowing one side to be a scalar of element type. | |||
13378 | QualType vType = CheckSizelessVectorOperands( | |||
13379 | LHS, RHS, Loc, /*isCompAssign*/ false, ACK_Comparison); | |||
13380 | ||||
13381 | if (vType.isNull()) | |||
13382 | return vType; | |||
13383 | ||||
13384 | QualType LHSType = LHS.get()->getType(); | |||
13385 | ||||
13386 | // For non-floating point types, check for self-comparisons of the form | |||
13387 | // x == x, x != x, x < x, etc. These always evaluate to a constant, and | |||
13388 | // often indicate logic errors in the program. | |||
13389 | diagnoseTautologicalComparison(*this, Loc, LHS.get(), RHS.get(), Opc); | |||
13390 | ||||
13391 | // Check for comparisons of floating point operands using != and ==. | |||
13392 | if (LHSType->hasFloatingRepresentation()) { | |||
13393 | assert(RHS.get()->getType()->hasFloatingRepresentation())(static_cast <bool> (RHS.get()->getType()->hasFloatingRepresentation ()) ? void (0) : __assert_fail ("RHS.get()->getType()->hasFloatingRepresentation()" , "clang/lib/Sema/SemaExpr.cpp", 13393, __extension__ __PRETTY_FUNCTION__ )); | |||
13394 | CheckFloatComparison(Loc, LHS.get(), RHS.get(), Opc); | |||
13395 | } | |||
13396 | ||||
13397 | const BuiltinType *LHSBuiltinTy = LHSType->getAs<BuiltinType>(); | |||
13398 | const BuiltinType *RHSBuiltinTy = RHS.get()->getType()->getAs<BuiltinType>(); | |||
13399 | ||||
13400 | if (LHSBuiltinTy && RHSBuiltinTy && LHSBuiltinTy->isSVEBool() && | |||
13401 | RHSBuiltinTy->isSVEBool()) | |||
13402 | return LHSType; | |||
13403 | ||||
13404 | // Return a signed type for the vector. | |||
13405 | return GetSignedSizelessVectorType(vType); | |||
13406 | } | |||
13407 | ||||
13408 | static void diagnoseXorMisusedAsPow(Sema &S, const ExprResult &XorLHS, | |||
13409 | const ExprResult &XorRHS, | |||
13410 | const SourceLocation Loc) { | |||
13411 | // Do not diagnose macros. | |||
13412 | if (Loc.isMacroID()) | |||
13413 | return; | |||
13414 | ||||
13415 | // Do not diagnose if both LHS and RHS are macros. | |||
13416 | if (XorLHS.get()->getExprLoc().isMacroID() && | |||
13417 | XorRHS.get()->getExprLoc().isMacroID()) | |||
13418 | return; | |||
13419 | ||||
13420 | bool Negative = false; | |||
13421 | bool ExplicitPlus = false; | |||
13422 | const auto *LHSInt = dyn_cast<IntegerLiteral>(XorLHS.get()); | |||
13423 | const auto *RHSInt = dyn_cast<IntegerLiteral>(XorRHS.get()); | |||
13424 | ||||
13425 | if (!LHSInt) | |||
13426 | return; | |||
13427 | if (!RHSInt) { | |||
13428 | // Check negative literals. | |||
13429 | if (const auto *UO = dyn_cast<UnaryOperator>(XorRHS.get())) { | |||
13430 | UnaryOperatorKind Opc = UO->getOpcode(); | |||
13431 | if (Opc != UO_Minus && Opc != UO_Plus) | |||
13432 | return; | |||
13433 | RHSInt = dyn_cast<IntegerLiteral>(UO->getSubExpr()); | |||
13434 | if (!RHSInt) | |||
13435 | return; | |||
13436 | Negative = (Opc == UO_Minus); | |||
13437 | ExplicitPlus = !Negative; | |||
13438 | } else { | |||
13439 | return; | |||
13440 | } | |||
13441 | } | |||
13442 | ||||
13443 | const llvm::APInt &LeftSideValue = LHSInt->getValue(); | |||
13444 | llvm::APInt RightSideValue = RHSInt->getValue(); | |||
13445 | if (LeftSideValue != 2 && LeftSideValue != 10) | |||
13446 | return; | |||
13447 | ||||
13448 | if (LeftSideValue.getBitWidth() != RightSideValue.getBitWidth()) | |||
13449 | return; | |||
13450 | ||||
13451 | CharSourceRange ExprRange = CharSourceRange::getCharRange( | |||
13452 | LHSInt->getBeginLoc(), S.getLocForEndOfToken(RHSInt->getLocation())); | |||
13453 | llvm::StringRef ExprStr = | |||
13454 | Lexer::getSourceText(ExprRange, S.getSourceManager(), S.getLangOpts()); | |||
13455 | ||||
13456 | CharSourceRange XorRange = | |||
13457 | CharSourceRange::getCharRange(Loc, S.getLocForEndOfToken(Loc)); | |||
13458 | llvm::StringRef XorStr = | |||
13459 | Lexer::getSourceText(XorRange, S.getSourceManager(), S.getLangOpts()); | |||
13460 | // Do not diagnose if xor keyword/macro is used. | |||
13461 | if (XorStr == "xor") | |||
13462 | return; | |||
13463 | ||||
13464 | std::string LHSStr = std::string(Lexer::getSourceText( | |||
13465 | CharSourceRange::getTokenRange(LHSInt->getSourceRange()), | |||
13466 | S.getSourceManager(), S.getLangOpts())); | |||
13467 | std::string RHSStr = std::string(Lexer::getSourceText( | |||
13468 | CharSourceRange::getTokenRange(RHSInt->getSourceRange()), | |||
13469 | S.getSourceManager(), S.getLangOpts())); | |||
13470 | ||||
13471 | if (Negative) { | |||
13472 | RightSideValue = -RightSideValue; | |||
13473 | RHSStr = "-" + RHSStr; | |||
13474 | } else if (ExplicitPlus) { | |||
13475 | RHSStr = "+" + RHSStr; | |||
13476 | } | |||
13477 | ||||
13478 | StringRef LHSStrRef = LHSStr; | |||
13479 | StringRef RHSStrRef = RHSStr; | |||
13480 | // Do not diagnose literals with digit separators, binary, hexadecimal, octal | |||
13481 | // literals. | |||
13482 | if (LHSStrRef.startswith("0b") || LHSStrRef.startswith("0B") || | |||
13483 | RHSStrRef.startswith("0b") || RHSStrRef.startswith("0B") || | |||
13484 | LHSStrRef.startswith("0x") || LHSStrRef.startswith("0X") || | |||
13485 | RHSStrRef.startswith("0x") || RHSStrRef.startswith("0X") || | |||
13486 | (LHSStrRef.size() > 1 && LHSStrRef.startswith("0")) || | |||
13487 | (RHSStrRef.size() > 1 && RHSStrRef.startswith("0")) || | |||
13488 | LHSStrRef.contains('\'') || RHSStrRef.contains('\'')) | |||
13489 | return; | |||
13490 | ||||
13491 | bool SuggestXor = | |||
13492 | S.getLangOpts().CPlusPlus || S.getPreprocessor().isMacroDefined("xor"); | |||
13493 | const llvm::APInt XorValue = LeftSideValue ^ RightSideValue; | |||
13494 | int64_t RightSideIntValue = RightSideValue.getSExtValue(); | |||
13495 | if (LeftSideValue == 2 && RightSideIntValue >= 0) { | |||
13496 | std::string SuggestedExpr = "1 << " + RHSStr; | |||
13497 | bool Overflow = false; | |||
13498 | llvm::APInt One = (LeftSideValue - 1); | |||
13499 | llvm::APInt PowValue = One.sshl_ov(RightSideValue, Overflow); | |||
13500 | if (Overflow) { | |||
13501 | if (RightSideIntValue < 64) | |||
13502 | S.Diag(Loc, diag::warn_xor_used_as_pow_base) | |||
13503 | << ExprStr << toString(XorValue, 10, true) << ("1LL << " + RHSStr) | |||
13504 | << FixItHint::CreateReplacement(ExprRange, "1LL << " + RHSStr); | |||
13505 | else if (RightSideIntValue == 64) | |||
13506 | S.Diag(Loc, diag::warn_xor_used_as_pow) | |||
13507 | << ExprStr << toString(XorValue, 10, true); | |||
13508 | else | |||
13509 | return; | |||
13510 | } else { | |||
13511 | S.Diag(Loc, diag::warn_xor_used_as_pow_base_extra) | |||
13512 | << ExprStr << toString(XorValue, 10, true) << SuggestedExpr | |||
13513 | << toString(PowValue, 10, true) | |||
13514 | << FixItHint::CreateReplacement( | |||
13515 | ExprRange, (RightSideIntValue == 0) ? "1" : SuggestedExpr); | |||
13516 | } | |||
13517 | ||||
13518 | S.Diag(Loc, diag::note_xor_used_as_pow_silence) | |||
13519 | << ("0x2 ^ " + RHSStr) << SuggestXor; | |||
13520 | } else if (LeftSideValue == 10) { | |||
13521 | std::string SuggestedValue = "1e" + std::to_string(RightSideIntValue); | |||
13522 | S.Diag(Loc, diag::warn_xor_used_as_pow_base) | |||
13523 | << ExprStr << toString(XorValue, 10, true) << SuggestedValue | |||
13524 | << FixItHint::CreateReplacement(ExprRange, SuggestedValue); | |||
13525 | S.Diag(Loc, diag::note_xor_used_as_pow_silence) | |||
13526 | << ("0xA ^ " + RHSStr) << SuggestXor; | |||
13527 | } | |||
13528 | } | |||
13529 | ||||
13530 | QualType Sema::CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, | |||
13531 | SourceLocation Loc) { | |||
13532 | // Ensure that either both operands are of the same vector type, or | |||
13533 | // one operand is of a vector type and the other is of its element type. | |||
13534 | QualType vType = CheckVectorOperands(LHS, RHS, Loc, false, | |||
13535 | /*AllowBothBool*/ true, | |||
13536 | /*AllowBoolConversions*/ false, | |||
13537 | /*AllowBooleanOperation*/ false, | |||
13538 | /*ReportInvalid*/ false); | |||
13539 | if (vType.isNull()) | |||
13540 | return InvalidOperands(Loc, LHS, RHS); | |||
13541 | if (getLangOpts().OpenCL && | |||
13542 | getLangOpts().getOpenCLCompatibleVersion() < 120 && | |||
13543 | vType->hasFloatingRepresentation()) | |||
13544 | return InvalidOperands(Loc, LHS, RHS); | |||
13545 | // FIXME: The check for C++ here is for GCC compatibility. GCC rejects the | |||
13546 | // usage of the logical operators && and || with vectors in C. This | |||
13547 | // check could be notionally dropped. | |||
13548 | if (!getLangOpts().CPlusPlus && | |||
13549 | !(isa<ExtVectorType>(vType->getAs<VectorType>()))) | |||
13550 | return InvalidLogicalVectorOperands(Loc, LHS, RHS); | |||
13551 | ||||
13552 | return GetSignedVectorType(LHS.get()->getType()); | |||
13553 | } | |||
13554 | ||||
13555 | QualType Sema::CheckMatrixElementwiseOperands(ExprResult &LHS, ExprResult &RHS, | |||
13556 | SourceLocation Loc, | |||
13557 | bool IsCompAssign) { | |||
13558 | if (!IsCompAssign) { | |||
13559 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
13560 | if (LHS.isInvalid()) | |||
13561 | return QualType(); | |||
13562 | } | |||
13563 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
13564 | if (RHS.isInvalid()) | |||
13565 | return QualType(); | |||
13566 | ||||
13567 | // For conversion purposes, we ignore any qualifiers. | |||
13568 | // For example, "const float" and "float" are equivalent. | |||
13569 | QualType LHSType = LHS.get()->getType().getUnqualifiedType(); | |||
13570 | QualType RHSType = RHS.get()->getType().getUnqualifiedType(); | |||
13571 | ||||
13572 | const MatrixType *LHSMatType = LHSType->getAs<MatrixType>(); | |||
13573 | const MatrixType *RHSMatType = RHSType->getAs<MatrixType>(); | |||
13574 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 13574, __extension__ __PRETTY_FUNCTION__ )); | |||
13575 | ||||
13576 | if (Context.hasSameType(LHSType, RHSType)) | |||
13577 | return Context.getCommonSugaredType(LHSType, RHSType); | |||
13578 | ||||
13579 | // Type conversion may change LHS/RHS. Keep copies to the original results, in | |||
13580 | // case we have to return InvalidOperands. | |||
13581 | ExprResult OriginalLHS = LHS; | |||
13582 | ExprResult OriginalRHS = RHS; | |||
13583 | if (LHSMatType && !RHSMatType) { | |||
13584 | RHS = tryConvertExprToType(RHS.get(), LHSMatType->getElementType()); | |||
13585 | if (!RHS.isInvalid()) | |||
13586 | return LHSType; | |||
13587 | ||||
13588 | return InvalidOperands(Loc, OriginalLHS, OriginalRHS); | |||
13589 | } | |||
13590 | ||||
13591 | if (!LHSMatType && RHSMatType) { | |||
13592 | LHS = tryConvertExprToType(LHS.get(), RHSMatType->getElementType()); | |||
13593 | if (!LHS.isInvalid()) | |||
13594 | return RHSType; | |||
13595 | return InvalidOperands(Loc, OriginalLHS, OriginalRHS); | |||
13596 | } | |||
13597 | ||||
13598 | return InvalidOperands(Loc, LHS, RHS); | |||
13599 | } | |||
13600 | ||||
13601 | QualType Sema::CheckMatrixMultiplyOperands(ExprResult &LHS, ExprResult &RHS, | |||
13602 | SourceLocation Loc, | |||
13603 | bool IsCompAssign) { | |||
13604 | if (!IsCompAssign) { | |||
13605 | LHS = DefaultFunctionArrayLvalueConversion(LHS.get()); | |||
13606 | if (LHS.isInvalid()) | |||
13607 | return QualType(); | |||
13608 | } | |||
13609 | RHS = DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
13610 | if (RHS.isInvalid()) | |||
13611 | return QualType(); | |||
13612 | ||||
13613 | auto *LHSMatType = LHS.get()->getType()->getAs<ConstantMatrixType>(); | |||
13614 | auto *RHSMatType = RHS.get()->getType()->getAs<ConstantMatrixType>(); | |||
13615 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 13615, __extension__ __PRETTY_FUNCTION__ )); | |||
13616 | ||||
13617 | if (LHSMatType && RHSMatType) { | |||
13618 | if (LHSMatType->getNumColumns() != RHSMatType->getNumRows()) | |||
13619 | return InvalidOperands(Loc, LHS, RHS); | |||
13620 | ||||
13621 | if (Context.hasSameType(LHSMatType, RHSMatType)) | |||
13622 | return Context.getCommonSugaredType( | |||
13623 | LHS.get()->getType().getUnqualifiedType(), | |||
13624 | RHS.get()->getType().getUnqualifiedType()); | |||
13625 | ||||
13626 | QualType LHSELTy = LHSMatType->getElementType(), | |||
13627 | RHSELTy = RHSMatType->getElementType(); | |||
13628 | if (!Context.hasSameType(LHSELTy, RHSELTy)) | |||
13629 | return InvalidOperands(Loc, LHS, RHS); | |||
13630 | ||||
13631 | return Context.getConstantMatrixType( | |||
13632 | Context.getCommonSugaredType(LHSELTy, RHSELTy), | |||
13633 | LHSMatType->getNumRows(), RHSMatType->getNumColumns()); | |||
13634 | } | |||
13635 | return CheckMatrixElementwiseOperands(LHS, RHS, Loc, IsCompAssign); | |||
13636 | } | |||
13637 | ||||
13638 | static bool isLegalBoolVectorBinaryOp(BinaryOperatorKind Opc) { | |||
13639 | switch (Opc) { | |||
13640 | default: | |||
13641 | return false; | |||
13642 | case BO_And: | |||
13643 | case BO_AndAssign: | |||
13644 | case BO_Or: | |||
13645 | case BO_OrAssign: | |||
13646 | case BO_Xor: | |||
13647 | case BO_XorAssign: | |||
13648 | return true; | |||
13649 | } | |||
13650 | } | |||
13651 | ||||
13652 | inline QualType Sema::CheckBitwiseOperands(ExprResult &LHS, ExprResult &RHS, | |||
13653 | SourceLocation Loc, | |||
13654 | BinaryOperatorKind Opc) { | |||
13655 | checkArithmeticNull(*this, LHS, RHS, Loc, /*IsCompare=*/false); | |||
13656 | ||||
13657 | bool IsCompAssign = | |||
13658 | Opc == BO_AndAssign || Opc == BO_OrAssign || Opc == BO_XorAssign; | |||
13659 | ||||
13660 | bool LegalBoolVecOperator = isLegalBoolVectorBinaryOp(Opc); | |||
13661 | ||||
13662 | if (LHS.get()->getType()->isVectorType() || | |||
13663 | RHS.get()->getType()->isVectorType()) { | |||
13664 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
13665 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
13666 | return CheckVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
13667 | /*AllowBothBool*/ true, | |||
13668 | /*AllowBoolConversions*/ getLangOpts().ZVector, | |||
13669 | /*AllowBooleanOperation*/ LegalBoolVecOperator, | |||
13670 | /*ReportInvalid*/ true); | |||
13671 | return InvalidOperands(Loc, LHS, RHS); | |||
13672 | } | |||
13673 | ||||
13674 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
13675 | RHS.get()->getType()->isVLSTBuiltinType()) { | |||
13676 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
13677 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
13678 | return CheckSizelessVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
13679 | ACK_BitwiseOp); | |||
13680 | return InvalidOperands(Loc, LHS, RHS); | |||
13681 | } | |||
13682 | ||||
13683 | if (LHS.get()->getType()->isVLSTBuiltinType() || | |||
13684 | RHS.get()->getType()->isVLSTBuiltinType()) { | |||
13685 | if (LHS.get()->getType()->hasIntegerRepresentation() && | |||
13686 | RHS.get()->getType()->hasIntegerRepresentation()) | |||
13687 | return CheckSizelessVectorOperands(LHS, RHS, Loc, IsCompAssign, | |||
13688 | ACK_BitwiseOp); | |||
13689 | return InvalidOperands(Loc, LHS, RHS); | |||
13690 | } | |||
13691 | ||||
13692 | if (Opc == BO_And) | |||
13693 | diagnoseLogicalNotOnLHSofCheck(*this, LHS, RHS, Loc, Opc); | |||
13694 | ||||
13695 | if (LHS.get()->getType()->hasFloatingRepresentation() || | |||
13696 | RHS.get()->getType()->hasFloatingRepresentation()) | |||
13697 | return InvalidOperands(Loc, LHS, RHS); | |||
13698 | ||||
13699 | ExprResult LHSResult = LHS, RHSResult = RHS; | |||
13700 | QualType compType = UsualArithmeticConversions( | |||
13701 | LHSResult, RHSResult, Loc, IsCompAssign ? ACK_CompAssign : ACK_BitwiseOp); | |||
13702 | if (LHSResult.isInvalid() || RHSResult.isInvalid()) | |||
13703 | return QualType(); | |||
13704 | LHS = LHSResult.get(); | |||
13705 | RHS = RHSResult.get(); | |||
13706 | ||||
13707 | if (Opc == BO_Xor) | |||
13708 | diagnoseXorMisusedAsPow(*this, LHS, RHS, Loc); | |||
13709 | ||||
13710 | if (!compType.isNull() && compType->isIntegralOrUnscopedEnumerationType()) | |||
13711 | return compType; | |||
13712 | return InvalidOperands(Loc, LHS, RHS); | |||
13713 | } | |||
13714 | ||||
13715 | // C99 6.5.[13,14] | |||
13716 | inline QualType Sema::CheckLogicalOperands(ExprResult &LHS, ExprResult &RHS, | |||
13717 | SourceLocation Loc, | |||
13718 | BinaryOperatorKind Opc) { | |||
13719 | // Check vector operands differently. | |||
13720 | if (LHS.get()->getType()->isVectorType() || | |||
13721 | RHS.get()->getType()->isVectorType()) | |||
13722 | return CheckVectorLogicalOperands(LHS, RHS, Loc); | |||
13723 | ||||
13724 | bool EnumConstantInBoolContext = false; | |||
13725 | for (const ExprResult &HS : {LHS, RHS}) { | |||
13726 | if (const auto *DREHS = dyn_cast<DeclRefExpr>(HS.get())) { | |||
13727 | const auto *ECDHS = dyn_cast<EnumConstantDecl>(DREHS->getDecl()); | |||
13728 | if (ECDHS && ECDHS->getInitVal() != 0 && ECDHS->getInitVal() != 1) | |||
13729 | EnumConstantInBoolContext = true; | |||
13730 | } | |||
13731 | } | |||
13732 | ||||
13733 | if (EnumConstantInBoolContext) | |||
13734 | Diag(Loc, diag::warn_enum_constant_in_bool_context); | |||
13735 | ||||
13736 | // Diagnose cases where the user write a logical and/or but probably meant a | |||
13737 | // bitwise one. We do this when the LHS is a non-bool integer and the RHS | |||
13738 | // is a constant. | |||
13739 | if (!EnumConstantInBoolContext && LHS.get()->getType()->isIntegerType() && | |||
13740 | !LHS.get()->getType()->isBooleanType() && | |||
13741 | RHS.get()->getType()->isIntegerType() && !RHS.get()->isValueDependent() && | |||
13742 | // Don't warn in macros or template instantiations. | |||
13743 | !Loc.isMacroID() && !inTemplateInstantiation()) { | |||
13744 | // If the RHS can be constant folded, and if it constant folds to something | |||
13745 | // that isn't 0 or 1 (which indicate a potential logical operation that | |||
13746 | // happened to fold to true/false) then warn. | |||
13747 | // Parens on the RHS are ignored. | |||
13748 | Expr::EvalResult EVResult; | |||
13749 | if (RHS.get()->EvaluateAsInt(EVResult, Context)) { | |||
13750 | llvm::APSInt Result = EVResult.Val.getInt(); | |||
13751 | if ((getLangOpts().Bool && !RHS.get()->getType()->isBooleanType() && | |||
13752 | !RHS.get()->getExprLoc().isMacroID()) || | |||
13753 | (Result != 0 && Result != 1)) { | |||
13754 | Diag(Loc, diag::warn_logical_instead_of_bitwise) | |||
13755 | << RHS.get()->getSourceRange() << (Opc == BO_LAnd ? "&&" : "||"); | |||
13756 | // Suggest replacing the logical operator with the bitwise version | |||
13757 | Diag(Loc, diag::note_logical_instead_of_bitwise_change_operator) | |||
13758 | << (Opc == BO_LAnd ? "&" : "|") | |||
13759 | << FixItHint::CreateReplacement( | |||
13760 | SourceRange(Loc, getLocForEndOfToken(Loc)), | |||
13761 | Opc == BO_LAnd ? "&" : "|"); | |||
13762 | if (Opc == BO_LAnd) | |||
13763 | // Suggest replacing "Foo() && kNonZero" with "Foo()" | |||
13764 | Diag(Loc, diag::note_logical_instead_of_bitwise_remove_constant) | |||
13765 | << FixItHint::CreateRemoval( | |||
13766 | SourceRange(getLocForEndOfToken(LHS.get()->getEndLoc()), | |||
13767 | RHS.get()->getEndLoc())); | |||
13768 | } | |||
13769 | } | |||
13770 | } | |||
13771 | ||||
13772 | if (!Context.getLangOpts().CPlusPlus) { | |||
13773 | // OpenCL v1.1 s6.3.g: The logical operators and (&&), or (||) do | |||
13774 | // not operate on the built-in scalar and vector float types. | |||
13775 | if (Context.getLangOpts().OpenCL && | |||
13776 | Context.getLangOpts().OpenCLVersion < 120) { | |||
13777 | if (LHS.get()->getType()->isFloatingType() || | |||
13778 | RHS.get()->getType()->isFloatingType()) | |||
13779 | return InvalidOperands(Loc, LHS, RHS); | |||
13780 | } | |||
13781 | ||||
13782 | LHS = UsualUnaryConversions(LHS.get()); | |||
13783 | if (LHS.isInvalid()) | |||
13784 | return QualType(); | |||
13785 | ||||
13786 | RHS = UsualUnaryConversions(RHS.get()); | |||
13787 | if (RHS.isInvalid()) | |||
13788 | return QualType(); | |||
13789 | ||||
13790 | if (!LHS.get()->getType()->isScalarType() || | |||
13791 | !RHS.get()->getType()->isScalarType()) | |||
13792 | return InvalidOperands(Loc, LHS, RHS); | |||
13793 | ||||
13794 | return Context.IntTy; | |||
13795 | } | |||
13796 | ||||
13797 | // The following is safe because we only use this method for | |||
13798 | // non-overloadable operands. | |||
13799 | ||||
13800 | // C++ [expr.log.and]p1 | |||
13801 | // C++ [expr.log.or]p1 | |||
13802 | // The operands are both contextually converted to type bool. | |||
13803 | ExprResult LHSRes = PerformContextuallyConvertToBool(LHS.get()); | |||
13804 | if (LHSRes.isInvalid()) | |||
13805 | return InvalidOperands(Loc, LHS, RHS); | |||
13806 | LHS = LHSRes; | |||
13807 | ||||
13808 | ExprResult RHSRes = PerformContextuallyConvertToBool(RHS.get()); | |||
13809 | if (RHSRes.isInvalid()) | |||
13810 | return InvalidOperands(Loc, LHS, RHS); | |||
13811 | RHS = RHSRes; | |||
13812 | ||||
13813 | // C++ [expr.log.and]p2 | |||
13814 | // C++ [expr.log.or]p2 | |||
13815 | // The result is a bool. | |||
13816 | return Context.BoolTy; | |||
13817 | } | |||
13818 | ||||
13819 | static bool IsReadonlyMessage(Expr *E, Sema &S) { | |||
13820 | const MemberExpr *ME = dyn_cast<MemberExpr>(E); | |||
13821 | if (!ME) return false; | |||
13822 | if (!isa<FieldDecl>(ME->getMemberDecl())) return false; | |||
13823 | ObjCMessageExpr *Base = dyn_cast<ObjCMessageExpr>( | |||
13824 | ME->getBase()->IgnoreImplicit()->IgnoreParenImpCasts()); | |||
13825 | if (!Base) return false; | |||
13826 | return Base->getMethodDecl() != nullptr; | |||
13827 | } | |||
13828 | ||||
13829 | /// Is the given expression (which must be 'const') a reference to a | |||
13830 | /// variable which was originally non-const, but which has become | |||
13831 | /// 'const' due to being captured within a block? | |||
13832 | enum NonConstCaptureKind { NCCK_None, NCCK_Block, NCCK_Lambda }; | |||
13833 | static NonConstCaptureKind isReferenceToNonConstCapture(Sema &S, Expr *E) { | |||
13834 | assert(E->isLValue() && E->getType().isConstQualified())(static_cast <bool> (E->isLValue() && E-> getType().isConstQualified()) ? void (0) : __assert_fail ("E->isLValue() && E->getType().isConstQualified()" , "clang/lib/Sema/SemaExpr.cpp", 13834, __extension__ __PRETTY_FUNCTION__ )); | |||
13835 | E = E->IgnoreParens(); | |||
13836 | ||||
13837 | // Must be a reference to a declaration from an enclosing scope. | |||
13838 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
13839 | if (!DRE) return NCCK_None; | |||
13840 | if (!DRE->refersToEnclosingVariableOrCapture()) return NCCK_None; | |||
13841 | ||||
13842 | // The declaration must be a variable which is not declared 'const'. | |||
13843 | VarDecl *var = dyn_cast<VarDecl>(DRE->getDecl()); | |||
13844 | if (!var) return NCCK_None; | |||
13845 | if (var->getType().isConstQualified()) return NCCK_None; | |||
13846 | 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?\"" , "clang/lib/Sema/SemaExpr.cpp", 13846, __extension__ __PRETTY_FUNCTION__ )); | |||
13847 | ||||
13848 | // Decide whether the first capture was for a block or a lambda. | |||
13849 | DeclContext *DC = S.CurContext, *Prev = nullptr; | |||
13850 | // Decide whether the first capture was for a block or a lambda. | |||
13851 | while (DC) { | |||
13852 | // For init-capture, it is possible that the variable belongs to the | |||
13853 | // template pattern of the current context. | |||
13854 | if (auto *FD = dyn_cast<FunctionDecl>(DC)) | |||
13855 | if (var->isInitCapture() && | |||
13856 | FD->getTemplateInstantiationPattern() == var->getDeclContext()) | |||
13857 | break; | |||
13858 | if (DC == var->getDeclContext()) | |||
13859 | break; | |||
13860 | Prev = DC; | |||
13861 | DC = DC->getParent(); | |||
13862 | } | |||
13863 | // Unless we have an init-capture, we've gone one step too far. | |||
13864 | if (!var->isInitCapture()) | |||
13865 | DC = Prev; | |||
13866 | return (isa<BlockDecl>(DC) ? NCCK_Block : NCCK_Lambda); | |||
13867 | } | |||
13868 | ||||
13869 | static bool IsTypeModifiable(QualType Ty, bool IsDereference) { | |||
13870 | Ty = Ty.getNonReferenceType(); | |||
13871 | if (IsDereference && Ty->isPointerType()) | |||
13872 | Ty = Ty->getPointeeType(); | |||
13873 | return !Ty.isConstQualified(); | |||
13874 | } | |||
13875 | ||||
13876 | // Update err_typecheck_assign_const and note_typecheck_assign_const | |||
13877 | // when this enum is changed. | |||
13878 | enum { | |||
13879 | ConstFunction, | |||
13880 | ConstVariable, | |||
13881 | ConstMember, | |||
13882 | ConstMethod, | |||
13883 | NestedConstMember, | |||
13884 | ConstUnknown, // Keep as last element | |||
13885 | }; | |||
13886 | ||||
13887 | /// Emit the "read-only variable not assignable" error and print notes to give | |||
13888 | /// more information about why the variable is not assignable, such as pointing | |||
13889 | /// to the declaration of a const variable, showing that a method is const, or | |||
13890 | /// that the function is returning a const reference. | |||
13891 | static void DiagnoseConstAssignment(Sema &S, const Expr *E, | |||
13892 | SourceLocation Loc) { | |||
13893 | SourceRange ExprRange = E->getSourceRange(); | |||
13894 | ||||
13895 | // Only emit one error on the first const found. All other consts will emit | |||
13896 | // a note to the error. | |||
13897 | bool DiagnosticEmitted = false; | |||
13898 | ||||
13899 | // Track if the current expression is the result of a dereference, and if the | |||
13900 | // next checked expression is the result of a dereference. | |||
13901 | bool IsDereference = false; | |||
13902 | bool NextIsDereference = false; | |||
13903 | ||||
13904 | // Loop to process MemberExpr chains. | |||
13905 | while (true) { | |||
13906 | IsDereference = NextIsDereference; | |||
13907 | ||||
13908 | E = E->IgnoreImplicit()->IgnoreParenImpCasts(); | |||
13909 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | |||
13910 | NextIsDereference = ME->isArrow(); | |||
13911 | const ValueDecl *VD = ME->getMemberDecl(); | |||
13912 | if (const FieldDecl *Field = dyn_cast<FieldDecl>(VD)) { | |||
13913 | // Mutable fields can be modified even if the class is const. | |||
13914 | if (Field->isMutable()) { | |||
13915 | assert(DiagnosticEmitted && "Expected diagnostic not emitted.")(static_cast <bool> (DiagnosticEmitted && "Expected diagnostic not emitted." ) ? void (0) : __assert_fail ("DiagnosticEmitted && \"Expected diagnostic not emitted.\"" , "clang/lib/Sema/SemaExpr.cpp", 13915, __extension__ __PRETTY_FUNCTION__ )); | |||
13916 | break; | |||
13917 | } | |||
13918 | ||||
13919 | if (!IsTypeModifiable(Field->getType(), IsDereference)) { | |||
13920 | if (!DiagnosticEmitted) { | |||
13921 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
13922 | << ExprRange << ConstMember << false /*static*/ << Field | |||
13923 | << Field->getType(); | |||
13924 | DiagnosticEmitted = true; | |||
13925 | } | |||
13926 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
13927 | << ConstMember << false /*static*/ << Field << Field->getType() | |||
13928 | << Field->getSourceRange(); | |||
13929 | } | |||
13930 | E = ME->getBase(); | |||
13931 | continue; | |||
13932 | } else if (const VarDecl *VDecl = dyn_cast<VarDecl>(VD)) { | |||
13933 | if (VDecl->getType().isConstQualified()) { | |||
13934 | if (!DiagnosticEmitted) { | |||
13935 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
13936 | << ExprRange << ConstMember << true /*static*/ << VDecl | |||
13937 | << VDecl->getType(); | |||
13938 | DiagnosticEmitted = true; | |||
13939 | } | |||
13940 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
13941 | << ConstMember << true /*static*/ << VDecl << VDecl->getType() | |||
13942 | << VDecl->getSourceRange(); | |||
13943 | } | |||
13944 | // Static fields do not inherit constness from parents. | |||
13945 | break; | |||
13946 | } | |||
13947 | break; // End MemberExpr | |||
13948 | } else if (const ArraySubscriptExpr *ASE = | |||
13949 | dyn_cast<ArraySubscriptExpr>(E)) { | |||
13950 | E = ASE->getBase()->IgnoreParenImpCasts(); | |||
13951 | continue; | |||
13952 | } else if (const ExtVectorElementExpr *EVE = | |||
13953 | dyn_cast<ExtVectorElementExpr>(E)) { | |||
13954 | E = EVE->getBase()->IgnoreParenImpCasts(); | |||
13955 | continue; | |||
13956 | } | |||
13957 | break; | |||
13958 | } | |||
13959 | ||||
13960 | if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { | |||
13961 | // Function calls | |||
13962 | const FunctionDecl *FD = CE->getDirectCallee(); | |||
13963 | if (FD && !IsTypeModifiable(FD->getReturnType(), IsDereference)) { | |||
13964 | if (!DiagnosticEmitted) { | |||
13965 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange | |||
13966 | << ConstFunction << FD; | |||
13967 | DiagnosticEmitted = true; | |||
13968 | } | |||
13969 | S.Diag(FD->getReturnTypeSourceRange().getBegin(), | |||
13970 | diag::note_typecheck_assign_const) | |||
13971 | << ConstFunction << FD << FD->getReturnType() | |||
13972 | << FD->getReturnTypeSourceRange(); | |||
13973 | } | |||
13974 | } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
13975 | // Point to variable declaration. | |||
13976 | if (const ValueDecl *VD = DRE->getDecl()) { | |||
13977 | if (!IsTypeModifiable(VD->getType(), IsDereference)) { | |||
13978 | if (!DiagnosticEmitted) { | |||
13979 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
13980 | << ExprRange << ConstVariable << VD << VD->getType(); | |||
13981 | DiagnosticEmitted = true; | |||
13982 | } | |||
13983 | S.Diag(VD->getLocation(), diag::note_typecheck_assign_const) | |||
13984 | << ConstVariable << VD << VD->getType() << VD->getSourceRange(); | |||
13985 | } | |||
13986 | } | |||
13987 | } else if (isa<CXXThisExpr>(E)) { | |||
13988 | if (const DeclContext *DC = S.getFunctionLevelDeclContext()) { | |||
13989 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DC)) { | |||
13990 | if (MD->isConst()) { | |||
13991 | if (!DiagnosticEmitted) { | |||
13992 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange | |||
13993 | << ConstMethod << MD; | |||
13994 | DiagnosticEmitted = true; | |||
13995 | } | |||
13996 | S.Diag(MD->getLocation(), diag::note_typecheck_assign_const) | |||
13997 | << ConstMethod << MD << MD->getSourceRange(); | |||
13998 | } | |||
13999 | } | |||
14000 | } | |||
14001 | } | |||
14002 | ||||
14003 | if (DiagnosticEmitted) | |||
14004 | return; | |||
14005 | ||||
14006 | // Can't determine a more specific message, so display the generic error. | |||
14007 | S.Diag(Loc, diag::err_typecheck_assign_const) << ExprRange << ConstUnknown; | |||
14008 | } | |||
14009 | ||||
14010 | enum OriginalExprKind { | |||
14011 | OEK_Variable, | |||
14012 | OEK_Member, | |||
14013 | OEK_LValue | |||
14014 | }; | |||
14015 | ||||
14016 | static void DiagnoseRecursiveConstFields(Sema &S, const ValueDecl *VD, | |||
14017 | const RecordType *Ty, | |||
14018 | SourceLocation Loc, SourceRange Range, | |||
14019 | OriginalExprKind OEK, | |||
14020 | bool &DiagnosticEmitted) { | |||
14021 | std::vector<const RecordType *> RecordTypeList; | |||
14022 | RecordTypeList.push_back(Ty); | |||
14023 | unsigned NextToCheckIndex = 0; | |||
14024 | // We walk the record hierarchy breadth-first to ensure that we print | |||
14025 | // diagnostics in field nesting order. | |||
14026 | while (RecordTypeList.size() > NextToCheckIndex) { | |||
14027 | bool IsNested = NextToCheckIndex > 0; | |||
14028 | for (const FieldDecl *Field : | |||
14029 | RecordTypeList[NextToCheckIndex]->getDecl()->fields()) { | |||
14030 | // First, check every field for constness. | |||
14031 | QualType FieldTy = Field->getType(); | |||
14032 | if (FieldTy.isConstQualified()) { | |||
14033 | if (!DiagnosticEmitted) { | |||
14034 | S.Diag(Loc, diag::err_typecheck_assign_const) | |||
14035 | << Range << NestedConstMember << OEK << VD | |||
14036 | << IsNested << Field; | |||
14037 | DiagnosticEmitted = true; | |||
14038 | } | |||
14039 | S.Diag(Field->getLocation(), diag::note_typecheck_assign_const) | |||
14040 | << NestedConstMember << IsNested << Field | |||
14041 | << FieldTy << Field->getSourceRange(); | |||
14042 | } | |||
14043 | ||||
14044 | // Then we append it to the list to check next in order. | |||
14045 | FieldTy = FieldTy.getCanonicalType(); | |||
14046 | if (const auto *FieldRecTy = FieldTy->getAs<RecordType>()) { | |||
14047 | if (!llvm::is_contained(RecordTypeList, FieldRecTy)) | |||
14048 | RecordTypeList.push_back(FieldRecTy); | |||
14049 | } | |||
14050 | } | |||
14051 | ++NextToCheckIndex; | |||
14052 | } | |||
14053 | } | |||
14054 | ||||
14055 | /// Emit an error for the case where a record we are trying to assign to has a | |||
14056 | /// const-qualified field somewhere in its hierarchy. | |||
14057 | static void DiagnoseRecursiveConstFields(Sema &S, const Expr *E, | |||
14058 | SourceLocation Loc) { | |||
14059 | QualType Ty = E->getType(); | |||
14060 | 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?\"" , "clang/lib/Sema/SemaExpr.cpp", 14060, __extension__ __PRETTY_FUNCTION__ )); | |||
14061 | SourceRange Range = E->getSourceRange(); | |||
14062 | const RecordType *RTy = Ty.getCanonicalType()->getAs<RecordType>(); | |||
14063 | bool DiagEmitted = false; | |||
14064 | ||||
14065 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) | |||
14066 | DiagnoseRecursiveConstFields(S, ME->getMemberDecl(), RTy, Loc, | |||
14067 | Range, OEK_Member, DiagEmitted); | |||
14068 | else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) | |||
14069 | DiagnoseRecursiveConstFields(S, DRE->getDecl(), RTy, Loc, | |||
14070 | Range, OEK_Variable, DiagEmitted); | |||
14071 | else | |||
14072 | DiagnoseRecursiveConstFields(S, nullptr, RTy, Loc, | |||
14073 | Range, OEK_LValue, DiagEmitted); | |||
14074 | if (!DiagEmitted) | |||
14075 | DiagnoseConstAssignment(S, E, Loc); | |||
14076 | } | |||
14077 | ||||
14078 | /// CheckForModifiableLvalue - Verify that E is a modifiable lvalue. If not, | |||
14079 | /// emit an error and return true. If so, return false. | |||
14080 | static bool CheckForModifiableLvalue(Expr *E, SourceLocation Loc, Sema &S) { | |||
14081 | assert(!E->hasPlaceholderType(BuiltinType::PseudoObject))(static_cast <bool> (!E->hasPlaceholderType(BuiltinType ::PseudoObject)) ? void (0) : __assert_fail ("!E->hasPlaceholderType(BuiltinType::PseudoObject)" , "clang/lib/Sema/SemaExpr.cpp", 14081, __extension__ __PRETTY_FUNCTION__ )); | |||
14082 | ||||
14083 | S.CheckShadowingDeclModification(E, Loc); | |||
14084 | ||||
14085 | SourceLocation OrigLoc = Loc; | |||
14086 | Expr::isModifiableLvalueResult IsLV = E->isModifiableLvalue(S.Context, | |||
14087 | &Loc); | |||
14088 | if (IsLV == Expr::MLV_ClassTemporary && IsReadonlyMessage(E, S)) | |||
14089 | IsLV = Expr::MLV_InvalidMessageExpression; | |||
14090 | if (IsLV == Expr::MLV_Valid) | |||
14091 | return false; | |||
14092 | ||||
14093 | unsigned DiagID = 0; | |||
14094 | bool NeedType = false; | |||
14095 | switch (IsLV) { // C99 6.5.16p2 | |||
14096 | case Expr::MLV_ConstQualified: | |||
14097 | // Use a specialized diagnostic when we're assigning to an object | |||
14098 | // from an enclosing function or block. | |||
14099 | if (NonConstCaptureKind NCCK = isReferenceToNonConstCapture(S, E)) { | |||
14100 | if (NCCK == NCCK_Block) | |||
14101 | DiagID = diag::err_block_decl_ref_not_modifiable_lvalue; | |||
14102 | else | |||
14103 | DiagID = diag::err_lambda_decl_ref_not_modifiable_lvalue; | |||
14104 | break; | |||
14105 | } | |||
14106 | ||||
14107 | // In ARC, use some specialized diagnostics for occasions where we | |||
14108 | // infer 'const'. These are always pseudo-strong variables. | |||
14109 | if (S.getLangOpts().ObjCAutoRefCount) { | |||
14110 | DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(E->IgnoreParenCasts()); | |||
14111 | if (declRef && isa<VarDecl>(declRef->getDecl())) { | |||
14112 | VarDecl *var = cast<VarDecl>(declRef->getDecl()); | |||
14113 | ||||
14114 | // Use the normal diagnostic if it's pseudo-__strong but the | |||
14115 | // user actually wrote 'const'. | |||
14116 | if (var->isARCPseudoStrong() && | |||
14117 | (!var->getTypeSourceInfo() || | |||
14118 | !var->getTypeSourceInfo()->getType().isConstQualified())) { | |||
14119 | // There are three pseudo-strong cases: | |||
14120 | // - self | |||
14121 | ObjCMethodDecl *method = S.getCurMethodDecl(); | |||
14122 | if (method && var == method->getSelfDecl()) { | |||
14123 | DiagID = method->isClassMethod() | |||
14124 | ? diag::err_typecheck_arc_assign_self_class_method | |||
14125 | : diag::err_typecheck_arc_assign_self; | |||
14126 | ||||
14127 | // - Objective-C externally_retained attribute. | |||
14128 | } else if (var->hasAttr<ObjCExternallyRetainedAttr>() || | |||
14129 | isa<ParmVarDecl>(var)) { | |||
14130 | DiagID = diag::err_typecheck_arc_assign_externally_retained; | |||
14131 | ||||
14132 | // - fast enumeration variables | |||
14133 | } else { | |||
14134 | DiagID = diag::err_typecheck_arr_assign_enumeration; | |||
14135 | } | |||
14136 | ||||
14137 | SourceRange Assign; | |||
14138 | if (Loc != OrigLoc) | |||
14139 | Assign = SourceRange(OrigLoc, OrigLoc); | |||
14140 | S.Diag(Loc, DiagID) << E->getSourceRange() << Assign; | |||
14141 | // We need to preserve the AST regardless, so migration tool | |||
14142 | // can do its job. | |||
14143 | return false; | |||
14144 | } | |||
14145 | } | |||
14146 | } | |||
14147 | ||||
14148 | // If none of the special cases above are triggered, then this is a | |||
14149 | // simple const assignment. | |||
14150 | if (DiagID == 0) { | |||
14151 | DiagnoseConstAssignment(S, E, Loc); | |||
14152 | return true; | |||
14153 | } | |||
14154 | ||||
14155 | break; | |||
14156 | case Expr::MLV_ConstAddrSpace: | |||
14157 | DiagnoseConstAssignment(S, E, Loc); | |||
14158 | return true; | |||
14159 | case Expr::MLV_ConstQualifiedField: | |||
14160 | DiagnoseRecursiveConstFields(S, E, Loc); | |||
14161 | return true; | |||
14162 | case Expr::MLV_ArrayType: | |||
14163 | case Expr::MLV_ArrayTemporary: | |||
14164 | DiagID = diag::err_typecheck_array_not_modifiable_lvalue; | |||
14165 | NeedType = true; | |||
14166 | break; | |||
14167 | case Expr::MLV_NotObjectType: | |||
14168 | DiagID = diag::err_typecheck_non_object_not_modifiable_lvalue; | |||
14169 | NeedType = true; | |||
14170 | break; | |||
14171 | case Expr::MLV_LValueCast: | |||
14172 | DiagID = diag::err_typecheck_lvalue_casts_not_supported; | |||
14173 | break; | |||
14174 | case Expr::MLV_Valid: | |||
14175 | llvm_unreachable("did not take early return for MLV_Valid")::llvm::llvm_unreachable_internal("did not take early return for MLV_Valid" , "clang/lib/Sema/SemaExpr.cpp", 14175); | |||
14176 | case Expr::MLV_InvalidExpression: | |||
14177 | case Expr::MLV_MemberFunction: | |||
14178 | case Expr::MLV_ClassTemporary: | |||
14179 | DiagID = diag::err_typecheck_expression_not_modifiable_lvalue; | |||
14180 | break; | |||
14181 | case Expr::MLV_IncompleteType: | |||
14182 | case Expr::MLV_IncompleteVoidType: | |||
14183 | return S.RequireCompleteType(Loc, E->getType(), | |||
14184 | diag::err_typecheck_incomplete_type_not_modifiable_lvalue, E); | |||
14185 | case Expr::MLV_DuplicateVectorComponents: | |||
14186 | DiagID = diag::err_typecheck_duplicate_vector_components_not_mlvalue; | |||
14187 | break; | |||
14188 | case Expr::MLV_NoSetterProperty: | |||
14189 | llvm_unreachable("readonly properties should be processed differently")::llvm::llvm_unreachable_internal("readonly properties should be processed differently" , "clang/lib/Sema/SemaExpr.cpp", 14189); | |||
14190 | case Expr::MLV_InvalidMessageExpression: | |||
14191 | DiagID = diag::err_readonly_message_assignment; | |||
14192 | break; | |||
14193 | case Expr::MLV_SubObjCPropertySetting: | |||
14194 | DiagID = diag::err_no_subobject_property_setting; | |||
14195 | break; | |||
14196 | } | |||
14197 | ||||
14198 | SourceRange Assign; | |||
14199 | if (Loc != OrigLoc) | |||
14200 | Assign = SourceRange(OrigLoc, OrigLoc); | |||
14201 | if (NeedType) | |||
14202 | S.Diag(Loc, DiagID) << E->getType() << E->getSourceRange() << Assign; | |||
14203 | else | |||
14204 | S.Diag(Loc, DiagID) << E->getSourceRange() << Assign; | |||
14205 | return true; | |||
14206 | } | |||
14207 | ||||
14208 | static void CheckIdentityFieldAssignment(Expr *LHSExpr, Expr *RHSExpr, | |||
14209 | SourceLocation Loc, | |||
14210 | Sema &Sema) { | |||
14211 | if (Sema.inTemplateInstantiation()) | |||
14212 | return; | |||
14213 | if (Sema.isUnevaluatedContext()) | |||
14214 | return; | |||
14215 | if (Loc.isInvalid() || Loc.isMacroID()) | |||
14216 | return; | |||
14217 | if (LHSExpr->getExprLoc().isMacroID() || RHSExpr->getExprLoc().isMacroID()) | |||
14218 | return; | |||
14219 | ||||
14220 | // C / C++ fields | |||
14221 | MemberExpr *ML = dyn_cast<MemberExpr>(LHSExpr); | |||
14222 | MemberExpr *MR = dyn_cast<MemberExpr>(RHSExpr); | |||
14223 | if (ML && MR) { | |||
14224 | if (!(isa<CXXThisExpr>(ML->getBase()) && isa<CXXThisExpr>(MR->getBase()))) | |||
14225 | return; | |||
14226 | const ValueDecl *LHSDecl = | |||
14227 | cast<ValueDecl>(ML->getMemberDecl()->getCanonicalDecl()); | |||
14228 | const ValueDecl *RHSDecl = | |||
14229 | cast<ValueDecl>(MR->getMemberDecl()->getCanonicalDecl()); | |||
14230 | if (LHSDecl != RHSDecl) | |||
14231 | return; | |||
14232 | if (LHSDecl->getType().isVolatileQualified()) | |||
14233 | return; | |||
14234 | if (const ReferenceType *RefTy = LHSDecl->getType()->getAs<ReferenceType>()) | |||
14235 | if (RefTy->getPointeeType().isVolatileQualified()) | |||
14236 | return; | |||
14237 | ||||
14238 | Sema.Diag(Loc, diag::warn_identity_field_assign) << 0; | |||
14239 | } | |||
14240 | ||||
14241 | // Objective-C instance variables | |||
14242 | ObjCIvarRefExpr *OL = dyn_cast<ObjCIvarRefExpr>(LHSExpr); | |||
14243 | ObjCIvarRefExpr *OR = dyn_cast<ObjCIvarRefExpr>(RHSExpr); | |||
14244 | if (OL && OR && OL->getDecl() == OR->getDecl()) { | |||
14245 | DeclRefExpr *RL = dyn_cast<DeclRefExpr>(OL->getBase()->IgnoreImpCasts()); | |||
14246 | DeclRefExpr *RR = dyn_cast<DeclRefExpr>(OR->getBase()->IgnoreImpCasts()); | |||
14247 | if (RL && RR && RL->getDecl() == RR->getDecl()) | |||
14248 | Sema.Diag(Loc, diag::warn_identity_field_assign) << 1; | |||
14249 | } | |||
14250 | } | |||
14251 | ||||
14252 | // C99 6.5.16.1 | |||
14253 | QualType Sema::CheckAssignmentOperands(Expr *LHSExpr, ExprResult &RHS, | |||
14254 | SourceLocation Loc, | |||
14255 | QualType CompoundType, | |||
14256 | BinaryOperatorKind Opc) { | |||
14257 | assert(!LHSExpr->hasPlaceholderType(BuiltinType::PseudoObject))(static_cast <bool> (!LHSExpr->hasPlaceholderType(BuiltinType ::PseudoObject)) ? void (0) : __assert_fail ("!LHSExpr->hasPlaceholderType(BuiltinType::PseudoObject)" , "clang/lib/Sema/SemaExpr.cpp", 14257, __extension__ __PRETTY_FUNCTION__ )); | |||
14258 | ||||
14259 | // Verify that LHS is a modifiable lvalue, and emit error if not. | |||
14260 | if (CheckForModifiableLvalue(LHSExpr, Loc, *this)) | |||
14261 | return QualType(); | |||
14262 | ||||
14263 | QualType LHSType = LHSExpr->getType(); | |||
14264 | QualType RHSType = CompoundType.isNull() ? RHS.get()->getType() : | |||
14265 | CompoundType; | |||
14266 | // OpenCL v1.2 s6.1.1.1 p2: | |||
14267 | // The half data type can only be used to declare a pointer to a buffer that | |||
14268 | // contains half values | |||
14269 | if (getLangOpts().OpenCL && | |||
14270 | !getOpenCLOptions().isAvailableOption("cl_khr_fp16", getLangOpts()) && | |||
14271 | LHSType->isHalfType()) { | |||
14272 | Diag(Loc, diag::err_opencl_half_load_store) << 1 | |||
14273 | << LHSType.getUnqualifiedType(); | |||
14274 | return QualType(); | |||
14275 | } | |||
14276 | ||||
14277 | AssignConvertType ConvTy; | |||
14278 | if (CompoundType.isNull()) { | |||
14279 | Expr *RHSCheck = RHS.get(); | |||
14280 | ||||
14281 | CheckIdentityFieldAssignment(LHSExpr, RHSCheck, Loc, *this); | |||
14282 | ||||
14283 | QualType LHSTy(LHSType); | |||
14284 | ConvTy = CheckSingleAssignmentConstraints(LHSTy, RHS); | |||
14285 | if (RHS.isInvalid()) | |||
14286 | return QualType(); | |||
14287 | // Special case of NSObject attributes on c-style pointer types. | |||
14288 | if (ConvTy == IncompatiblePointer && | |||
14289 | ((Context.isObjCNSObjectType(LHSType) && | |||
14290 | RHSType->isObjCObjectPointerType()) || | |||
14291 | (Context.isObjCNSObjectType(RHSType) && | |||
14292 | LHSType->isObjCObjectPointerType()))) | |||
14293 | ConvTy = Compatible; | |||
14294 | ||||
14295 | if (ConvTy == Compatible && | |||
14296 | LHSType->isObjCObjectType()) | |||
14297 | Diag(Loc, diag::err_objc_object_assignment) | |||
14298 | << LHSType; | |||
14299 | ||||
14300 | // If the RHS is a unary plus or minus, check to see if they = and + are | |||
14301 | // right next to each other. If so, the user may have typo'd "x =+ 4" | |||
14302 | // instead of "x += 4". | |||
14303 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(RHSCheck)) | |||
14304 | RHSCheck = ICE->getSubExpr(); | |||
14305 | if (UnaryOperator *UO = dyn_cast<UnaryOperator>(RHSCheck)) { | |||
14306 | if ((UO->getOpcode() == UO_Plus || UO->getOpcode() == UO_Minus) && | |||
14307 | Loc.isFileID() && UO->getOperatorLoc().isFileID() && | |||
14308 | // Only if the two operators are exactly adjacent. | |||
14309 | Loc.getLocWithOffset(1) == UO->getOperatorLoc() && | |||
14310 | // And there is a space or other character before the subexpr of the | |||
14311 | // unary +/-. We don't want to warn on "x=-1". | |||
14312 | Loc.getLocWithOffset(2) != UO->getSubExpr()->getBeginLoc() && | |||
14313 | UO->getSubExpr()->getBeginLoc().isFileID()) { | |||
14314 | Diag(Loc, diag::warn_not_compound_assign) | |||
14315 | << (UO->getOpcode() == UO_Plus ? "+" : "-") | |||
14316 | << SourceRange(UO->getOperatorLoc(), UO->getOperatorLoc()); | |||
14317 | } | |||
14318 | } | |||
14319 | ||||
14320 | if (ConvTy == Compatible) { | |||
14321 | if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong) { | |||
14322 | // Warn about retain cycles where a block captures the LHS, but | |||
14323 | // not if the LHS is a simple variable into which the block is | |||
14324 | // being stored...unless that variable can be captured by reference! | |||
14325 | const Expr *InnerLHS = LHSExpr->IgnoreParenCasts(); | |||
14326 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InnerLHS); | |||
14327 | if (!DRE || DRE->getDecl()->hasAttr<BlocksAttr>()) | |||
14328 | checkRetainCycles(LHSExpr, RHS.get()); | |||
14329 | } | |||
14330 | ||||
14331 | if (LHSType.getObjCLifetime() == Qualifiers::OCL_Strong || | |||
14332 | LHSType.isNonWeakInMRRWithObjCWeak(Context)) { | |||
14333 | // It is safe to assign a weak reference into a strong variable. | |||
14334 | // Although this code can still have problems: | |||
14335 | // id x = self.weakProp; | |||
14336 | // id y = self.weakProp; | |||
14337 | // we do not warn to warn spuriously when 'x' and 'y' are on separate | |||
14338 | // paths through the function. This should be revisited if | |||
14339 | // -Wrepeated-use-of-weak is made flow-sensitive. | |||
14340 | // For ObjCWeak only, we do not warn if the assign is to a non-weak | |||
14341 | // variable, which will be valid for the current autorelease scope. | |||
14342 | if (!Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, | |||
14343 | RHS.get()->getBeginLoc())) | |||
14344 | getCurFunction()->markSafeWeakUse(RHS.get()); | |||
14345 | ||||
14346 | } else if (getLangOpts().ObjCAutoRefCount || getLangOpts().ObjCWeak) { | |||
14347 | checkUnsafeExprAssigns(Loc, LHSExpr, RHS.get()); | |||
14348 | } | |||
14349 | } | |||
14350 | } else { | |||
14351 | // Compound assignment "x += y" | |||
14352 | ConvTy = CheckAssignmentConstraints(Loc, LHSType, RHSType); | |||
14353 | } | |||
14354 | ||||
14355 | if (DiagnoseAssignmentResult(ConvTy, Loc, LHSType, RHSType, | |||
14356 | RHS.get(), AA_Assigning)) | |||
14357 | return QualType(); | |||
14358 | ||||
14359 | CheckForNullPointerDereference(*this, LHSExpr); | |||
14360 | ||||
14361 | if (getLangOpts().CPlusPlus20 && LHSType.isVolatileQualified()) { | |||
14362 | if (CompoundType.isNull()) { | |||
14363 | // C++2a [expr.ass]p5: | |||
14364 | // A simple-assignment whose left operand is of a volatile-qualified | |||
14365 | // type is deprecated unless the assignment is either a discarded-value | |||
14366 | // expression or an unevaluated operand | |||
14367 | ExprEvalContexts.back().VolatileAssignmentLHSs.push_back(LHSExpr); | |||
14368 | } | |||
14369 | } | |||
14370 | ||||
14371 | // C11 6.5.16p3: The type of an assignment expression is the type of the | |||
14372 | // left operand would have after lvalue conversion. | |||
14373 | // C11 6.3.2.1p2: ...this is called lvalue conversion. If the lvalue has | |||
14374 | // qualified type, the value has the unqualified version of the type of the | |||
14375 | // lvalue; additionally, if the lvalue has atomic type, the value has the | |||
14376 | // non-atomic version of the type of the lvalue. | |||
14377 | // C++ 5.17p1: the type of the assignment expression is that of its left | |||
14378 | // operand. | |||
14379 | return getLangOpts().CPlusPlus ? LHSType : LHSType.getAtomicUnqualifiedType(); | |||
14380 | } | |||
14381 | ||||
14382 | // Scenarios to ignore if expression E is: | |||
14383 | // 1. an explicit cast expression into void | |||
14384 | // 2. a function call expression that returns void | |||
14385 | static bool IgnoreCommaOperand(const Expr *E, const ASTContext &Context) { | |||
14386 | E = E->IgnoreParens(); | |||
14387 | ||||
14388 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { | |||
14389 | if (CE->getCastKind() == CK_ToVoid) { | |||
14390 | return true; | |||
14391 | } | |||
14392 | ||||
14393 | // static_cast<void> on a dependent type will not show up as CK_ToVoid. | |||
14394 | if (CE->getCastKind() == CK_Dependent && E->getType()->isVoidType() && | |||
14395 | CE->getSubExpr()->getType()->isDependentType()) { | |||
14396 | return true; | |||
14397 | } | |||
14398 | } | |||
14399 | ||||
14400 | if (const auto *CE = dyn_cast<CallExpr>(E)) | |||
14401 | return CE->getCallReturnType(Context)->isVoidType(); | |||
14402 | return false; | |||
14403 | } | |||
14404 | ||||
14405 | // Look for instances where it is likely the comma operator is confused with | |||
14406 | // another operator. There is an explicit list of acceptable expressions for | |||
14407 | // the left hand side of the comma operator, otherwise emit a warning. | |||
14408 | void Sema::DiagnoseCommaOperator(const Expr *LHS, SourceLocation Loc) { | |||
14409 | // No warnings in macros | |||
14410 | if (Loc.isMacroID()) | |||
14411 | return; | |||
14412 | ||||
14413 | // Don't warn in template instantiations. | |||
14414 | if (inTemplateInstantiation()) | |||
14415 | return; | |||
14416 | ||||
14417 | // Scope isn't fine-grained enough to explicitly list the specific cases, so | |||
14418 | // instead, skip more than needed, then call back into here with the | |||
14419 | // CommaVisitor in SemaStmt.cpp. | |||
14420 | // The listed locations are the initialization and increment portions | |||
14421 | // of a for loop. The additional checks are on the condition of | |||
14422 | // if statements, do/while loops, and for loops. | |||
14423 | // Differences in scope flags for C89 mode requires the extra logic. | |||
14424 | const unsigned ForIncrementFlags = | |||
14425 | getLangOpts().C99 || getLangOpts().CPlusPlus | |||
14426 | ? Scope::ControlScope | Scope::ContinueScope | Scope::BreakScope | |||
14427 | : Scope::ContinueScope | Scope::BreakScope; | |||
14428 | const unsigned ForInitFlags = Scope::ControlScope | Scope::DeclScope; | |||
14429 | const unsigned ScopeFlags = getCurScope()->getFlags(); | |||
14430 | if ((ScopeFlags & ForIncrementFlags) == ForIncrementFlags || | |||
14431 | (ScopeFlags & ForInitFlags) == ForInitFlags) | |||
14432 | return; | |||
14433 | ||||
14434 | // If there are multiple comma operators used together, get the RHS of the | |||
14435 | // of the comma operator as the LHS. | |||
14436 | while (const BinaryOperator *BO = dyn_cast<BinaryOperator>(LHS)) { | |||
14437 | if (BO->getOpcode() != BO_Comma) | |||
14438 | break; | |||
14439 | LHS = BO->getRHS(); | |||
14440 | } | |||
14441 | ||||
14442 | // Only allow some expressions on LHS to not warn. | |||
14443 | if (IgnoreCommaOperand(LHS, Context)) | |||
14444 | return; | |||
14445 | ||||
14446 | Diag(Loc, diag::warn_comma_operator); | |||
14447 | Diag(LHS->getBeginLoc(), diag::note_cast_to_void) | |||
14448 | << LHS->getSourceRange() | |||
14449 | << FixItHint::CreateInsertion(LHS->getBeginLoc(), | |||
14450 | LangOpts.CPlusPlus ? "static_cast<void>(" | |||
14451 | : "(void)(") | |||
14452 | << FixItHint::CreateInsertion(PP.getLocForEndOfToken(LHS->getEndLoc()), | |||
14453 | ")"); | |||
14454 | } | |||
14455 | ||||
14456 | // C99 6.5.17 | |||
14457 | static QualType CheckCommaOperands(Sema &S, ExprResult &LHS, ExprResult &RHS, | |||
14458 | SourceLocation Loc) { | |||
14459 | LHS = S.CheckPlaceholderExpr(LHS.get()); | |||
14460 | RHS = S.CheckPlaceholderExpr(RHS.get()); | |||
14461 | if (LHS.isInvalid() || RHS.isInvalid()) | |||
14462 | return QualType(); | |||
14463 | ||||
14464 | // C's comma performs lvalue conversion (C99 6.3.2.1) on both its | |||
14465 | // operands, but not unary promotions. | |||
14466 | // C++'s comma does not do any conversions at all (C++ [expr.comma]p1). | |||
14467 | ||||
14468 | // So we treat the LHS as a ignored value, and in C++ we allow the | |||
14469 | // containing site to determine what should be done with the RHS. | |||
14470 | LHS = S.IgnoredValueConversions(LHS.get()); | |||
14471 | if (LHS.isInvalid()) | |||
14472 | return QualType(); | |||
14473 | ||||
14474 | S.DiagnoseUnusedExprResult(LHS.get(), diag::warn_unused_comma_left_operand); | |||
14475 | ||||
14476 | if (!S.getLangOpts().CPlusPlus) { | |||
14477 | RHS = S.DefaultFunctionArrayLvalueConversion(RHS.get()); | |||
14478 | if (RHS.isInvalid()) | |||
14479 | return QualType(); | |||
14480 | if (!RHS.get()->getType()->isVoidType()) | |||
14481 | S.RequireCompleteType(Loc, RHS.get()->getType(), | |||
14482 | diag::err_incomplete_type); | |||
14483 | } | |||
14484 | ||||
14485 | if (!S.getDiagnostics().isIgnored(diag::warn_comma_operator, Loc)) | |||
14486 | S.DiagnoseCommaOperator(LHS.get(), Loc); | |||
14487 | ||||
14488 | return RHS.get()->getType(); | |||
14489 | } | |||
14490 | ||||
14491 | /// CheckIncrementDecrementOperand - unlike most "Check" methods, this routine | |||
14492 | /// doesn't need to call UsualUnaryConversions or UsualArithmeticConversions. | |||
14493 | static QualType CheckIncrementDecrementOperand(Sema &S, Expr *Op, | |||
14494 | ExprValueKind &VK, | |||
14495 | ExprObjectKind &OK, | |||
14496 | SourceLocation OpLoc, | |||
14497 | bool IsInc, bool IsPrefix) { | |||
14498 | if (Op->isTypeDependent()) | |||
14499 | return S.Context.DependentTy; | |||
14500 | ||||
14501 | QualType ResType = Op->getType(); | |||
14502 | // Atomic types can be used for increment / decrement where the non-atomic | |||
14503 | // versions can, so ignore the _Atomic() specifier for the purpose of | |||
14504 | // checking. | |||
14505 | if (const AtomicType *ResAtomicType = ResType->getAs<AtomicType>()) | |||
14506 | ResType = ResAtomicType->getValueType(); | |||
14507 | ||||
14508 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 14508, __extension__ __PRETTY_FUNCTION__ )); | |||
14509 | ||||
14510 | if (S.getLangOpts().CPlusPlus && ResType->isBooleanType()) { | |||
14511 | // Decrement of bool is not allowed. | |||
14512 | if (!IsInc) { | |||
14513 | S.Diag(OpLoc, diag::err_decrement_bool) << Op->getSourceRange(); | |||
14514 | return QualType(); | |||
14515 | } | |||
14516 | // Increment of bool sets it to true, but is deprecated. | |||
14517 | S.Diag(OpLoc, S.getLangOpts().CPlusPlus17 ? diag::ext_increment_bool | |||
14518 | : diag::warn_increment_bool) | |||
14519 | << Op->getSourceRange(); | |||
14520 | } else if (S.getLangOpts().CPlusPlus && ResType->isEnumeralType()) { | |||
14521 | // Error on enum increments and decrements in C++ mode | |||
14522 | S.Diag(OpLoc, diag::err_increment_decrement_enum) << IsInc << ResType; | |||
14523 | return QualType(); | |||
14524 | } else if (ResType->isRealType()) { | |||
14525 | // OK! | |||
14526 | } else if (ResType->isPointerType()) { | |||
14527 | // C99 6.5.2.4p2, 6.5.6p2 | |||
14528 | if (!checkArithmeticOpPointerOperand(S, OpLoc, Op)) | |||
14529 | return QualType(); | |||
14530 | } else if (ResType->isObjCObjectPointerType()) { | |||
14531 | // On modern runtimes, ObjC pointer arithmetic is forbidden. | |||
14532 | // Otherwise, we just need a complete type. | |||
14533 | if (checkArithmeticIncompletePointerType(S, OpLoc, Op) || | |||
14534 | checkArithmeticOnObjCPointer(S, OpLoc, Op)) | |||
14535 | return QualType(); | |||
14536 | } else if (ResType->isAnyComplexType()) { | |||
14537 | // C99 does not support ++/-- on complex types, we allow as an extension. | |||
14538 | S.Diag(OpLoc, diag::ext_integer_increment_complex) | |||
14539 | << ResType << Op->getSourceRange(); | |||
14540 | } else if (ResType->isPlaceholderType()) { | |||
14541 | ExprResult PR = S.CheckPlaceholderExpr(Op); | |||
14542 | if (PR.isInvalid()) return QualType(); | |||
14543 | return CheckIncrementDecrementOperand(S, PR.get(), VK, OK, OpLoc, | |||
14544 | IsInc, IsPrefix); | |||
14545 | } else if (S.getLangOpts().AltiVec && ResType->isVectorType()) { | |||
14546 | // OK! ( C/C++ Language Extensions for CBEA(Version 2.6) 10.3 ) | |||
14547 | } else if (S.getLangOpts().ZVector && ResType->isVectorType() && | |||
14548 | (ResType->castAs<VectorType>()->getVectorKind() != | |||
14549 | VectorType::AltiVecBool)) { | |||
14550 | // The z vector extensions allow ++ and -- for non-bool vectors. | |||
14551 | } else if(S.getLangOpts().OpenCL && ResType->isVectorType() && | |||
14552 | ResType->castAs<VectorType>()->getElementType()->isIntegerType()) { | |||
14553 | // OpenCL V1.2 6.3 says dec/inc ops operate on integer vector types. | |||
14554 | } else { | |||
14555 | S.Diag(OpLoc, diag::err_typecheck_illegal_increment_decrement) | |||
14556 | << ResType << int(IsInc) << Op->getSourceRange(); | |||
14557 | return QualType(); | |||
14558 | } | |||
14559 | // At this point, we know we have a real, complex or pointer type. | |||
14560 | // Now make sure the operand is a modifiable lvalue. | |||
14561 | if (CheckForModifiableLvalue(Op, OpLoc, S)) | |||
14562 | return QualType(); | |||
14563 | if (S.getLangOpts().CPlusPlus20 && ResType.isVolatileQualified()) { | |||
14564 | // C++2a [expr.pre.inc]p1, [expr.post.inc]p1: | |||
14565 | // An operand with volatile-qualified type is deprecated | |||
14566 | S.Diag(OpLoc, diag::warn_deprecated_increment_decrement_volatile) | |||
14567 | << IsInc << ResType; | |||
14568 | } | |||
14569 | // In C++, a prefix increment is the same type as the operand. Otherwise | |||
14570 | // (in C or with postfix), the increment is the unqualified type of the | |||
14571 | // operand. | |||
14572 | if (IsPrefix && S.getLangOpts().CPlusPlus) { | |||
14573 | VK = VK_LValue; | |||
14574 | OK = Op->getObjectKind(); | |||
14575 | return ResType; | |||
14576 | } else { | |||
14577 | VK = VK_PRValue; | |||
14578 | return ResType.getUnqualifiedType(); | |||
14579 | } | |||
14580 | } | |||
14581 | ||||
14582 | ||||
14583 | /// getPrimaryDecl - Helper function for CheckAddressOfOperand(). | |||
14584 | /// This routine allows us to typecheck complex/recursive expressions | |||
14585 | /// where the declaration is needed for type checking. We only need to | |||
14586 | /// handle cases when the expression references a function designator | |||
14587 | /// or is an lvalue. Here are some examples: | |||
14588 | /// - &(x) => x | |||
14589 | /// - &*****f => f for f a function designator. | |||
14590 | /// - &s.xx => s | |||
14591 | /// - &s.zz[1].yy -> s, if zz is an array | |||
14592 | /// - *(x + 1) -> x, if x is an array | |||
14593 | /// - &"123"[2] -> 0 | |||
14594 | /// - & __real__ x -> x | |||
14595 | /// | |||
14596 | /// FIXME: We don't recurse to the RHS of a comma, nor handle pointers to | |||
14597 | /// members. | |||
14598 | static ValueDecl *getPrimaryDecl(Expr *E) { | |||
14599 | switch (E->getStmtClass()) { | |||
14600 | case Stmt::DeclRefExprClass: | |||
14601 | return cast<DeclRefExpr>(E)->getDecl(); | |||
14602 | case Stmt::MemberExprClass: | |||
14603 | // If this is an arrow operator, the address is an offset from | |||
14604 | // the base's value, so the object the base refers to is | |||
14605 | // irrelevant. | |||
14606 | if (cast<MemberExpr>(E)->isArrow()) | |||
14607 | return nullptr; | |||
14608 | // Otherwise, the expression refers to a part of the base | |||
14609 | return getPrimaryDecl(cast<MemberExpr>(E)->getBase()); | |||
14610 | case Stmt::ArraySubscriptExprClass: { | |||
14611 | // FIXME: This code shouldn't be necessary! We should catch the implicit | |||
14612 | // promotion of register arrays earlier. | |||
14613 | Expr* Base = cast<ArraySubscriptExpr>(E)->getBase(); | |||
14614 | if (ImplicitCastExpr* ICE = dyn_cast<ImplicitCastExpr>(Base)) { | |||
14615 | if (ICE->getSubExpr()->getType()->isArrayType()) | |||
14616 | return getPrimaryDecl(ICE->getSubExpr()); | |||
14617 | } | |||
14618 | return nullptr; | |||
14619 | } | |||
14620 | case Stmt::UnaryOperatorClass: { | |||
14621 | UnaryOperator *UO = cast<UnaryOperator>(E); | |||
14622 | ||||
14623 | switch(UO->getOpcode()) { | |||
14624 | case UO_Real: | |||
14625 | case UO_Imag: | |||
14626 | case UO_Extension: | |||
14627 | return getPrimaryDecl(UO->getSubExpr()); | |||
14628 | default: | |||
14629 | return nullptr; | |||
14630 | } | |||
14631 | } | |||
14632 | case Stmt::ParenExprClass: | |||
14633 | return getPrimaryDecl(cast<ParenExpr>(E)->getSubExpr()); | |||
14634 | case Stmt::ImplicitCastExprClass: | |||
14635 | // If the result of an implicit cast is an l-value, we care about | |||
14636 | // the sub-expression; otherwise, the result here doesn't matter. | |||
14637 | return getPrimaryDecl(cast<ImplicitCastExpr>(E)->getSubExpr()); | |||
14638 | case Stmt::CXXUuidofExprClass: | |||
14639 | return cast<CXXUuidofExpr>(E)->getGuidDecl(); | |||
14640 | default: | |||
14641 | return nullptr; | |||
14642 | } | |||
14643 | } | |||
14644 | ||||
14645 | namespace { | |||
14646 | enum { | |||
14647 | AO_Bit_Field = 0, | |||
14648 | AO_Vector_Element = 1, | |||
14649 | AO_Property_Expansion = 2, | |||
14650 | AO_Register_Variable = 3, | |||
14651 | AO_Matrix_Element = 4, | |||
14652 | AO_No_Error = 5 | |||
14653 | }; | |||
14654 | } | |||
14655 | /// Diagnose invalid operand for address of operations. | |||
14656 | /// | |||
14657 | /// \param Type The type of operand which cannot have its address taken. | |||
14658 | static void diagnoseAddressOfInvalidType(Sema &S, SourceLocation Loc, | |||
14659 | Expr *E, unsigned Type) { | |||
14660 | S.Diag(Loc, diag::err_typecheck_address_of) << Type << E->getSourceRange(); | |||
14661 | } | |||
14662 | ||||
14663 | /// CheckAddressOfOperand - The operand of & must be either a function | |||
14664 | /// designator or an lvalue designating an object. If it is an lvalue, the | |||
14665 | /// object cannot be declared with storage class register or be a bit field. | |||
14666 | /// Note: The usual conversions are *not* applied to the operand of the & | |||
14667 | /// operator (C99 6.3.2.1p[2-4]), and its result is never an lvalue. | |||
14668 | /// In C++, the operand might be an overloaded function name, in which case | |||
14669 | /// we allow the '&' but retain the overloaded-function type. | |||
14670 | QualType Sema::CheckAddressOfOperand(ExprResult &OrigOp, SourceLocation OpLoc) { | |||
14671 | if (const BuiltinType *PTy = OrigOp.get()->getType()->getAsPlaceholderType()){ | |||
14672 | if (PTy->getKind() == BuiltinType::Overload) { | |||
14673 | Expr *E = OrigOp.get()->IgnoreParens(); | |||
14674 | if (!isa<OverloadExpr>(E)) { | |||
14675 | 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" , "clang/lib/Sema/SemaExpr.cpp", 14675, __extension__ __PRETTY_FUNCTION__ )); | |||
14676 | Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof_addrof_function) | |||
14677 | << OrigOp.get()->getSourceRange(); | |||
14678 | return QualType(); | |||
14679 | } | |||
14680 | ||||
14681 | OverloadExpr *Ovl = cast<OverloadExpr>(E); | |||
14682 | if (isa<UnresolvedMemberExpr>(Ovl)) | |||
14683 | if (!ResolveSingleFunctionTemplateSpecialization(Ovl)) { | |||
14684 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
14685 | << OrigOp.get()->getSourceRange(); | |||
14686 | return QualType(); | |||
14687 | } | |||
14688 | ||||
14689 | return Context.OverloadTy; | |||
14690 | } | |||
14691 | ||||
14692 | if (PTy->getKind() == BuiltinType::UnknownAny) | |||
14693 | return Context.UnknownAnyTy; | |||
14694 | ||||
14695 | if (PTy->getKind() == BuiltinType::BoundMember) { | |||
14696 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
14697 | << OrigOp.get()->getSourceRange(); | |||
14698 | return QualType(); | |||
14699 | } | |||
14700 | ||||
14701 | OrigOp = CheckPlaceholderExpr(OrigOp.get()); | |||
14702 | if (OrigOp.isInvalid()) return QualType(); | |||
14703 | } | |||
14704 | ||||
14705 | if (OrigOp.get()->isTypeDependent()) | |||
14706 | return Context.DependentTy; | |||
14707 | ||||
14708 | assert(!OrigOp.get()->hasPlaceholderType())(static_cast <bool> (!OrigOp.get()->hasPlaceholderType ()) ? void (0) : __assert_fail ("!OrigOp.get()->hasPlaceholderType()" , "clang/lib/Sema/SemaExpr.cpp", 14708, __extension__ __PRETTY_FUNCTION__ )); | |||
14709 | ||||
14710 | // Make sure to ignore parentheses in subsequent checks | |||
14711 | Expr *op = OrigOp.get()->IgnoreParens(); | |||
14712 | ||||
14713 | // In OpenCL captures for blocks called as lambda functions | |||
14714 | // are located in the private address space. Blocks used in | |||
14715 | // enqueue_kernel can be located in a different address space | |||
14716 | // depending on a vendor implementation. Thus preventing | |||
14717 | // taking an address of the capture to avoid invalid AS casts. | |||
14718 | if (LangOpts.OpenCL) { | |||
14719 | auto* VarRef = dyn_cast<DeclRefExpr>(op); | |||
14720 | if (VarRef && VarRef->refersToEnclosingVariableOrCapture()) { | |||
14721 | Diag(op->getExprLoc(), diag::err_opencl_taking_address_capture); | |||
14722 | return QualType(); | |||
14723 | } | |||
14724 | } | |||
14725 | ||||
14726 | if (getLangOpts().C99) { | |||
14727 | // Implement C99-only parts of addressof rules. | |||
14728 | if (UnaryOperator* uOp = dyn_cast<UnaryOperator>(op)) { | |||
14729 | if (uOp->getOpcode() == UO_Deref) | |||
14730 | // Per C99 6.5.3.2, the address of a deref always returns a valid result | |||
14731 | // (assuming the deref expression is valid). | |||
14732 | return uOp->getSubExpr()->getType(); | |||
14733 | } | |||
14734 | // Technically, there should be a check for array subscript | |||
14735 | // expressions here, but the result of one is always an lvalue anyway. | |||
14736 | } | |||
14737 | ValueDecl *dcl = getPrimaryDecl(op); | |||
14738 | ||||
14739 | if (auto *FD = dyn_cast_or_null<FunctionDecl>(dcl)) | |||
14740 | if (!checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | |||
14741 | op->getBeginLoc())) | |||
14742 | return QualType(); | |||
14743 | ||||
14744 | Expr::LValueClassification lval = op->ClassifyLValue(Context); | |||
14745 | unsigned AddressOfError = AO_No_Error; | |||
14746 | ||||
14747 | if (lval == Expr::LV_ClassTemporary || lval == Expr::LV_ArrayTemporary) { | |||
14748 | bool sfinae = (bool)isSFINAEContext(); | |||
14749 | Diag(OpLoc, isSFINAEContext() ? diag::err_typecheck_addrof_temporary | |||
14750 | : diag::ext_typecheck_addrof_temporary) | |||
14751 | << op->getType() << op->getSourceRange(); | |||
14752 | if (sfinae) | |||
14753 | return QualType(); | |||
14754 | // Materialize the temporary as an lvalue so that we can take its address. | |||
14755 | OrigOp = op = | |||
14756 | CreateMaterializeTemporaryExpr(op->getType(), OrigOp.get(), true); | |||
14757 | } else if (isa<ObjCSelectorExpr>(op)) { | |||
14758 | return Context.getPointerType(op->getType()); | |||
14759 | } else if (lval == Expr::LV_MemberFunction) { | |||
14760 | // If it's an instance method, make a member pointer. | |||
14761 | // The expression must have exactly the form &A::foo. | |||
14762 | ||||
14763 | // If the underlying expression isn't a decl ref, give up. | |||
14764 | if (!isa<DeclRefExpr>(op)) { | |||
14765 | Diag(OpLoc, diag::err_invalid_form_pointer_member_function) | |||
14766 | << OrigOp.get()->getSourceRange(); | |||
14767 | return QualType(); | |||
14768 | } | |||
14769 | DeclRefExpr *DRE = cast<DeclRefExpr>(op); | |||
14770 | CXXMethodDecl *MD = cast<CXXMethodDecl>(DRE->getDecl()); | |||
14771 | ||||
14772 | // The id-expression was parenthesized. | |||
14773 | if (OrigOp.get() != DRE) { | |||
14774 | Diag(OpLoc, diag::err_parens_pointer_member_function) | |||
14775 | << OrigOp.get()->getSourceRange(); | |||
14776 | ||||
14777 | // The method was named without a qualifier. | |||
14778 | } else if (!DRE->getQualifier()) { | |||
14779 | if (MD->getParent()->getName().empty()) | |||
14780 | Diag(OpLoc, diag::err_unqualified_pointer_member_function) | |||
14781 | << op->getSourceRange(); | |||
14782 | else { | |||
14783 | SmallString<32> Str; | |||
14784 | StringRef Qual = (MD->getParent()->getName() + "::").toStringRef(Str); | |||
14785 | Diag(OpLoc, diag::err_unqualified_pointer_member_function) | |||
14786 | << op->getSourceRange() | |||
14787 | << FixItHint::CreateInsertion(op->getSourceRange().getBegin(), Qual); | |||
14788 | } | |||
14789 | } | |||
14790 | ||||
14791 | // Taking the address of a dtor is illegal per C++ [class.dtor]p2. | |||
14792 | if (isa<CXXDestructorDecl>(MD)) | |||
14793 | Diag(OpLoc, diag::err_typecheck_addrof_dtor) << op->getSourceRange(); | |||
14794 | ||||
14795 | QualType MPTy = Context.getMemberPointerType( | |||
14796 | op->getType(), Context.getTypeDeclType(MD->getParent()).getTypePtr()); | |||
14797 | // Under the MS ABI, lock down the inheritance model now. | |||
14798 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
14799 | (void)isCompleteType(OpLoc, MPTy); | |||
14800 | return MPTy; | |||
14801 | } else if (lval != Expr::LV_Valid && lval != Expr::LV_IncompleteVoidType) { | |||
14802 | // C99 6.5.3.2p1 | |||
14803 | // The operand must be either an l-value or a function designator | |||
14804 | if (!op->getType()->isFunctionType()) { | |||
14805 | // Use a special diagnostic for loads from property references. | |||
14806 | if (isa<PseudoObjectExpr>(op)) { | |||
14807 | AddressOfError = AO_Property_Expansion; | |||
14808 | } else { | |||
14809 | Diag(OpLoc, diag::err_typecheck_invalid_lvalue_addrof) | |||
14810 | << op->getType() << op->getSourceRange(); | |||
14811 | return QualType(); | |||
14812 | } | |||
14813 | } | |||
14814 | } else if (op->getObjectKind() == OK_BitField) { // C99 6.5.3.2p1 | |||
14815 | // The operand cannot be a bit-field | |||
14816 | AddressOfError = AO_Bit_Field; | |||
14817 | } else if (op->getObjectKind() == OK_VectorComponent) { | |||
14818 | // The operand cannot be an element of a vector | |||
14819 | AddressOfError = AO_Vector_Element; | |||
14820 | } else if (op->getObjectKind() == OK_MatrixComponent) { | |||
14821 | // The operand cannot be an element of a matrix. | |||
14822 | AddressOfError = AO_Matrix_Element; | |||
14823 | } else if (dcl) { // C99 6.5.3.2p1 | |||
14824 | // We have an lvalue with a decl. Make sure the decl is not declared | |||
14825 | // with the register storage-class specifier. | |||
14826 | if (const VarDecl *vd = dyn_cast<VarDecl>(dcl)) { | |||
14827 | // in C++ it is not error to take address of a register | |||
14828 | // variable (c++03 7.1.1P3) | |||
14829 | if (vd->getStorageClass() == SC_Register && | |||
14830 | !getLangOpts().CPlusPlus) { | |||
14831 | AddressOfError = AO_Register_Variable; | |||
14832 | } | |||
14833 | } else if (isa<MSPropertyDecl>(dcl)) { | |||
14834 | AddressOfError = AO_Property_Expansion; | |||
14835 | } else if (isa<FunctionTemplateDecl>(dcl)) { | |||
14836 | return Context.OverloadTy; | |||
14837 | } else if (isa<FieldDecl>(dcl) || isa<IndirectFieldDecl>(dcl)) { | |||
14838 | // Okay: we can take the address of a field. | |||
14839 | // Could be a pointer to member, though, if there is an explicit | |||
14840 | // scope qualifier for the class. | |||
14841 | if (isa<DeclRefExpr>(op) && cast<DeclRefExpr>(op)->getQualifier()) { | |||
14842 | DeclContext *Ctx = dcl->getDeclContext(); | |||
14843 | if (Ctx && Ctx->isRecord()) { | |||
14844 | if (dcl->getType()->isReferenceType()) { | |||
14845 | Diag(OpLoc, | |||
14846 | diag::err_cannot_form_pointer_to_member_of_reference_type) | |||
14847 | << dcl->getDeclName() << dcl->getType(); | |||
14848 | return QualType(); | |||
14849 | } | |||
14850 | ||||
14851 | while (cast<RecordDecl>(Ctx)->isAnonymousStructOrUnion()) | |||
14852 | Ctx = Ctx->getParent(); | |||
14853 | ||||
14854 | QualType MPTy = Context.getMemberPointerType( | |||
14855 | op->getType(), | |||
14856 | Context.getTypeDeclType(cast<RecordDecl>(Ctx)).getTypePtr()); | |||
14857 | // Under the MS ABI, lock down the inheritance model now. | |||
14858 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
14859 | (void)isCompleteType(OpLoc, MPTy); | |||
14860 | return MPTy; | |||
14861 | } | |||
14862 | } | |||
14863 | } else if (!isa<FunctionDecl, NonTypeTemplateParmDecl, BindingDecl, | |||
14864 | MSGuidDecl, UnnamedGlobalConstantDecl>(dcl)) | |||
14865 | llvm_unreachable("Unknown/unexpected decl type")::llvm::llvm_unreachable_internal("Unknown/unexpected decl type" , "clang/lib/Sema/SemaExpr.cpp", 14865); | |||
14866 | } | |||
14867 | ||||
14868 | if (AddressOfError != AO_No_Error) { | |||
14869 | diagnoseAddressOfInvalidType(*this, OpLoc, op, AddressOfError); | |||
14870 | return QualType(); | |||
14871 | } | |||
14872 | ||||
14873 | if (lval == Expr::LV_IncompleteVoidType) { | |||
14874 | // Taking the address of a void variable is technically illegal, but we | |||
14875 | // allow it in cases which are otherwise valid. | |||
14876 | // Example: "extern void x; void* y = &x;". | |||
14877 | Diag(OpLoc, diag::ext_typecheck_addrof_void) << op->getSourceRange(); | |||
14878 | } | |||
14879 | ||||
14880 | // If the operand has type "type", the result has type "pointer to type". | |||
14881 | if (op->getType()->isObjCObjectType()) | |||
14882 | return Context.getObjCObjectPointerType(op->getType()); | |||
14883 | ||||
14884 | if (Context.getTargetInfo().getTriple().isWasm() && | |||
14885 | op->getType()->isWebAssemblyReferenceType()) { | |||
14886 | Diag(OpLoc, diag::err_wasm_ca_reference) | |||
14887 | << 1 << OrigOp.get()->getSourceRange(); | |||
14888 | return QualType(); | |||
14889 | } | |||
14890 | ||||
14891 | CheckAddressOfPackedMember(op); | |||
14892 | ||||
14893 | return Context.getPointerType(op->getType()); | |||
14894 | } | |||
14895 | ||||
14896 | static void RecordModifiableNonNullParam(Sema &S, const Expr *Exp) { | |||
14897 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Exp); | |||
14898 | if (!DRE) | |||
14899 | return; | |||
14900 | const Decl *D = DRE->getDecl(); | |||
14901 | if (!D) | |||
14902 | return; | |||
14903 | const ParmVarDecl *Param = dyn_cast<ParmVarDecl>(D); | |||
14904 | if (!Param) | |||
14905 | return; | |||
14906 | if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(Param->getDeclContext())) | |||
14907 | if (!FD->hasAttr<NonNullAttr>() && !Param->hasAttr<NonNullAttr>()) | |||
14908 | return; | |||
14909 | if (FunctionScopeInfo *FD = S.getCurFunction()) | |||
14910 | FD->ModifiedNonNullParams.insert(Param); | |||
14911 | } | |||
14912 | ||||
14913 | /// CheckIndirectionOperand - Type check unary indirection (prefix '*'). | |||
14914 | static QualType CheckIndirectionOperand(Sema &S, Expr *Op, ExprValueKind &VK, | |||
14915 | SourceLocation OpLoc, | |||
14916 | bool IsAfterAmp = false) { | |||
14917 | if (Op->isTypeDependent()) | |||
14918 | return S.Context.DependentTy; | |||
14919 | ||||
14920 | ExprResult ConvResult = S.UsualUnaryConversions(Op); | |||
14921 | if (ConvResult.isInvalid()) | |||
14922 | return QualType(); | |||
14923 | Op = ConvResult.get(); | |||
14924 | QualType OpTy = Op->getType(); | |||
14925 | QualType Result; | |||
14926 | ||||
14927 | if (isa<CXXReinterpretCastExpr>(Op)) { | |||
14928 | QualType OpOrigType = Op->IgnoreParenCasts()->getType(); | |||
14929 | S.CheckCompatibleReinterpretCast(OpOrigType, OpTy, /*IsDereference*/true, | |||
14930 | Op->getSourceRange()); | |||
14931 | } | |||
14932 | ||||
14933 | if (const PointerType *PT = OpTy->getAs<PointerType>()) | |||
14934 | { | |||
14935 | Result = PT->getPointeeType(); | |||
14936 | } | |||
14937 | else if (const ObjCObjectPointerType *OPT = | |||
14938 | OpTy->getAs<ObjCObjectPointerType>()) | |||
14939 | Result = OPT->getPointeeType(); | |||
14940 | else { | |||
14941 | ExprResult PR = S.CheckPlaceholderExpr(Op); | |||
14942 | if (PR.isInvalid()) return QualType(); | |||
14943 | if (PR.get() != Op) | |||
14944 | return CheckIndirectionOperand(S, PR.get(), VK, OpLoc); | |||
14945 | } | |||
14946 | ||||
14947 | if (Result.isNull()) { | |||
14948 | S.Diag(OpLoc, diag::err_typecheck_indirection_requires_pointer) | |||
14949 | << OpTy << Op->getSourceRange(); | |||
14950 | return QualType(); | |||
14951 | } | |||
14952 | ||||
14953 | if (Result->isVoidType()) { | |||
14954 | // C++ [expr.unary.op]p1: | |||
14955 | // [...] the expression to which [the unary * operator] is applied shall | |||
14956 | // be a pointer to an object type, or a pointer to a function type | |||
14957 | LangOptions LO = S.getLangOpts(); | |||
14958 | if (LO.CPlusPlus) | |||
14959 | S.Diag(OpLoc, diag::ext_typecheck_indirection_through_void_pointer_cpp) | |||
14960 | << OpTy << Op->getSourceRange(); | |||
14961 | else if (!(LO.C99 && IsAfterAmp) && !S.isUnevaluatedContext()) | |||
14962 | S.Diag(OpLoc, diag::ext_typecheck_indirection_through_void_pointer) | |||
14963 | << OpTy << Op->getSourceRange(); | |||
14964 | } | |||
14965 | ||||
14966 | // Dereferences are usually l-values... | |||
14967 | VK = VK_LValue; | |||
14968 | ||||
14969 | // ...except that certain expressions are never l-values in C. | |||
14970 | if (!S.getLangOpts().CPlusPlus && Result.isCForbiddenLValueType()) | |||
14971 | VK = VK_PRValue; | |||
14972 | ||||
14973 | return Result; | |||
14974 | } | |||
14975 | ||||
14976 | BinaryOperatorKind Sema::ConvertTokenKindToBinaryOpcode(tok::TokenKind Kind) { | |||
14977 | BinaryOperatorKind Opc; | |||
14978 | switch (Kind) { | |||
14979 | default: llvm_unreachable("Unknown binop!")::llvm::llvm_unreachable_internal("Unknown binop!", "clang/lib/Sema/SemaExpr.cpp" , 14979); | |||
14980 | case tok::periodstar: Opc = BO_PtrMemD; break; | |||
14981 | case tok::arrowstar: Opc = BO_PtrMemI; break; | |||
14982 | case tok::star: Opc = BO_Mul; break; | |||
14983 | case tok::slash: Opc = BO_Div; break; | |||
14984 | case tok::percent: Opc = BO_Rem; break; | |||
14985 | case tok::plus: Opc = BO_Add; break; | |||
14986 | case tok::minus: Opc = BO_Sub; break; | |||
14987 | case tok::lessless: Opc = BO_Shl; break; | |||
14988 | case tok::greatergreater: Opc = BO_Shr; break; | |||
14989 | case tok::lessequal: Opc = BO_LE; break; | |||
14990 | case tok::less: Opc = BO_LT; break; | |||
14991 | case tok::greaterequal: Opc = BO_GE; break; | |||
14992 | case tok::greater: Opc = BO_GT; break; | |||
14993 | case tok::exclaimequal: Opc = BO_NE; break; | |||
14994 | case tok::equalequal: Opc = BO_EQ; break; | |||
14995 | case tok::spaceship: Opc = BO_Cmp; break; | |||
14996 | case tok::amp: Opc = BO_And; break; | |||
14997 | case tok::caret: Opc = BO_Xor; break; | |||
14998 | case tok::pipe: Opc = BO_Or; break; | |||
14999 | case tok::ampamp: Opc = BO_LAnd; break; | |||
15000 | case tok::pipepipe: Opc = BO_LOr; break; | |||
15001 | case tok::equal: Opc = BO_Assign; break; | |||
15002 | case tok::starequal: Opc = BO_MulAssign; break; | |||
15003 | case tok::slashequal: Opc = BO_DivAssign; break; | |||
15004 | case tok::percentequal: Opc = BO_RemAssign; break; | |||
15005 | case tok::plusequal: Opc = BO_AddAssign; break; | |||
15006 | case tok::minusequal: Opc = BO_SubAssign; break; | |||
15007 | case tok::lesslessequal: Opc = BO_ShlAssign; break; | |||
15008 | case tok::greatergreaterequal: Opc = BO_ShrAssign; break; | |||
15009 | case tok::ampequal: Opc = BO_AndAssign; break; | |||
15010 | case tok::caretequal: Opc = BO_XorAssign; break; | |||
15011 | case tok::pipeequal: Opc = BO_OrAssign; break; | |||
15012 | case tok::comma: Opc = BO_Comma; break; | |||
15013 | } | |||
15014 | return Opc; | |||
15015 | } | |||
15016 | ||||
15017 | static inline UnaryOperatorKind ConvertTokenKindToUnaryOpcode( | |||
15018 | tok::TokenKind Kind) { | |||
15019 | UnaryOperatorKind Opc; | |||
15020 | switch (Kind) { | |||
15021 | default: llvm_unreachable("Unknown unary op!")::llvm::llvm_unreachable_internal("Unknown unary op!", "clang/lib/Sema/SemaExpr.cpp" , 15021); | |||
15022 | case tok::plusplus: Opc = UO_PreInc; break; | |||
15023 | case tok::minusminus: Opc = UO_PreDec; break; | |||
15024 | case tok::amp: Opc = UO_AddrOf; break; | |||
15025 | case tok::star: Opc = UO_Deref; break; | |||
15026 | case tok::plus: Opc = UO_Plus; break; | |||
15027 | case tok::minus: Opc = UO_Minus; break; | |||
15028 | case tok::tilde: Opc = UO_Not; break; | |||
15029 | case tok::exclaim: Opc = UO_LNot; break; | |||
15030 | case tok::kw___real: Opc = UO_Real; break; | |||
15031 | case tok::kw___imag: Opc = UO_Imag; break; | |||
15032 | case tok::kw___extension__: Opc = UO_Extension; break; | |||
15033 | } | |||
15034 | return Opc; | |||
15035 | } | |||
15036 | ||||
15037 | const FieldDecl * | |||
15038 | Sema::getSelfAssignmentClassMemberCandidate(const ValueDecl *SelfAssigned) { | |||
15039 | // Explore the case for adding 'this->' to the LHS of a self assignment, very | |||
15040 | // common for setters. | |||
15041 | // struct A { | |||
15042 | // int X; | |||
15043 | // -void setX(int X) { X = X; } | |||
15044 | // +void setX(int X) { this->X = X; } | |||
15045 | // }; | |||
15046 | ||||
15047 | // Only consider parameters for self assignment fixes. | |||
15048 | if (!isa<ParmVarDecl>(SelfAssigned)) | |||
15049 | return nullptr; | |||
15050 | const auto *Method = | |||
15051 | dyn_cast_or_null<CXXMethodDecl>(getCurFunctionDecl(true)); | |||
15052 | if (!Method) | |||
15053 | return nullptr; | |||
15054 | ||||
15055 | const CXXRecordDecl *Parent = Method->getParent(); | |||
15056 | // In theory this is fixable if the lambda explicitly captures this, but | |||
15057 | // that's added complexity that's rarely going to be used. | |||
15058 | if (Parent->isLambda()) | |||
15059 | return nullptr; | |||
15060 | ||||
15061 | // FIXME: Use an actual Lookup operation instead of just traversing fields | |||
15062 | // in order to get base class fields. | |||
15063 | auto Field = | |||
15064 | llvm::find_if(Parent->fields(), | |||
15065 | [Name(SelfAssigned->getDeclName())](const FieldDecl *F) { | |||
15066 | return F->getDeclName() == Name; | |||
15067 | }); | |||
15068 | return (Field != Parent->field_end()) ? *Field : nullptr; | |||
15069 | } | |||
15070 | ||||
15071 | /// DiagnoseSelfAssignment - Emits a warning if a value is assigned to itself. | |||
15072 | /// This warning suppressed in the event of macro expansions. | |||
15073 | static void DiagnoseSelfAssignment(Sema &S, Expr *LHSExpr, Expr *RHSExpr, | |||
15074 | SourceLocation OpLoc, bool IsBuiltin) { | |||
15075 | if (S.inTemplateInstantiation()) | |||
15076 | return; | |||
15077 | if (S.isUnevaluatedContext()) | |||
15078 | return; | |||
15079 | if (OpLoc.isInvalid() || OpLoc.isMacroID()) | |||
15080 | return; | |||
15081 | LHSExpr = LHSExpr->IgnoreParenImpCasts(); | |||
15082 | RHSExpr = RHSExpr->IgnoreParenImpCasts(); | |||
15083 | const DeclRefExpr *LHSDeclRef = dyn_cast<DeclRefExpr>(LHSExpr); | |||
15084 | const DeclRefExpr *RHSDeclRef = dyn_cast<DeclRefExpr>(RHSExpr); | |||
15085 | if (!LHSDeclRef || !RHSDeclRef || | |||
15086 | LHSDeclRef->getLocation().isMacroID() || | |||
15087 | RHSDeclRef->getLocation().isMacroID()) | |||
15088 | return; | |||
15089 | const ValueDecl *LHSDecl = | |||
15090 | cast<ValueDecl>(LHSDeclRef->getDecl()->getCanonicalDecl()); | |||
15091 | const ValueDecl *RHSDecl = | |||
15092 | cast<ValueDecl>(RHSDeclRef->getDecl()->getCanonicalDecl()); | |||
15093 | if (LHSDecl != RHSDecl) | |||
15094 | return; | |||
15095 | if (LHSDecl->getType().isVolatileQualified()) | |||
15096 | return; | |||
15097 | if (const ReferenceType *RefTy = LHSDecl->getType()->getAs<ReferenceType>()) | |||
15098 | if (RefTy->getPointeeType().isVolatileQualified()) | |||
15099 | return; | |||
15100 | ||||
15101 | auto Diag = S.Diag(OpLoc, IsBuiltin ? diag::warn_self_assignment_builtin | |||
15102 | : diag::warn_self_assignment_overloaded) | |||
15103 | << LHSDeclRef->getType() << LHSExpr->getSourceRange() | |||
15104 | << RHSExpr->getSourceRange(); | |||
15105 | if (const FieldDecl *SelfAssignField = | |||
15106 | S.getSelfAssignmentClassMemberCandidate(RHSDecl)) | |||
15107 | Diag << 1 << SelfAssignField | |||
15108 | << FixItHint::CreateInsertion(LHSDeclRef->getBeginLoc(), "this->"); | |||
15109 | else | |||
15110 | Diag << 0; | |||
15111 | } | |||
15112 | ||||
15113 | /// Check if a bitwise-& is performed on an Objective-C pointer. This | |||
15114 | /// is usually indicative of introspection within the Objective-C pointer. | |||
15115 | static void checkObjCPointerIntrospection(Sema &S, ExprResult &L, ExprResult &R, | |||
15116 | SourceLocation OpLoc) { | |||
15117 | if (!S.getLangOpts().ObjC) | |||
15118 | return; | |||
15119 | ||||
15120 | const Expr *ObjCPointerExpr = nullptr, *OtherExpr = nullptr; | |||
15121 | const Expr *LHS = L.get(); | |||
15122 | const Expr *RHS = R.get(); | |||
15123 | ||||
15124 | if (LHS->IgnoreParenCasts()->getType()->isObjCObjectPointerType()) { | |||
15125 | ObjCPointerExpr = LHS; | |||
15126 | OtherExpr = RHS; | |||
15127 | } | |||
15128 | else if (RHS->IgnoreParenCasts()->getType()->isObjCObjectPointerType()) { | |||
15129 | ObjCPointerExpr = RHS; | |||
15130 | OtherExpr = LHS; | |||
15131 | } | |||
15132 | ||||
15133 | // This warning is deliberately made very specific to reduce false | |||
15134 | // positives with logic that uses '&' for hashing. This logic mainly | |||
15135 | // looks for code trying to introspect into tagged pointers, which | |||
15136 | // code should generally never do. | |||
15137 | if (ObjCPointerExpr && isa<IntegerLiteral>(OtherExpr->IgnoreParenCasts())) { | |||
15138 | unsigned Diag = diag::warn_objc_pointer_masking; | |||
15139 | // Determine if we are introspecting the result of performSelectorXXX. | |||
15140 | const Expr *Ex = ObjCPointerExpr->IgnoreParenCasts(); | |||
15141 | // Special case messages to -performSelector and friends, which | |||
15142 | // can return non-pointer values boxed in a pointer value. | |||
15143 | // Some clients may wish to silence warnings in this subcase. | |||
15144 | if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(Ex)) { | |||
15145 | Selector S = ME->getSelector(); | |||
15146 | StringRef SelArg0 = S.getNameForSlot(0); | |||
15147 | if (SelArg0.startswith("performSelector")) | |||
15148 | Diag = diag::warn_objc_pointer_masking_performSelector; | |||
15149 | } | |||
15150 | ||||
15151 | S.Diag(OpLoc, Diag) | |||
15152 | << ObjCPointerExpr->getSourceRange(); | |||
15153 | } | |||
15154 | } | |||
15155 | ||||
15156 | static NamedDecl *getDeclFromExpr(Expr *E) { | |||
15157 | if (!E) | |||
15158 | return nullptr; | |||
15159 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
15160 | return DRE->getDecl(); | |||
15161 | if (auto *ME = dyn_cast<MemberExpr>(E)) | |||
15162 | return ME->getMemberDecl(); | |||
15163 | if (auto *IRE = dyn_cast<ObjCIvarRefExpr>(E)) | |||
15164 | return IRE->getDecl(); | |||
15165 | return nullptr; | |||
15166 | } | |||
15167 | ||||
15168 | // This helper function promotes a binary operator's operands (which are of a | |||
15169 | // half vector type) to a vector of floats and then truncates the result to | |||
15170 | // a vector of either half or short. | |||
15171 | static ExprResult convertHalfVecBinOp(Sema &S, ExprResult LHS, ExprResult RHS, | |||
15172 | BinaryOperatorKind Opc, QualType ResultTy, | |||
15173 | ExprValueKind VK, ExprObjectKind OK, | |||
15174 | bool IsCompAssign, SourceLocation OpLoc, | |||
15175 | FPOptionsOverride FPFeatures) { | |||
15176 | auto &Context = S.getASTContext(); | |||
15177 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15179, __extension__ __PRETTY_FUNCTION__ )) | |||
15178 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15179, __extension__ __PRETTY_FUNCTION__ )) | |||
15179 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 15179, __extension__ __PRETTY_FUNCTION__ )); | |||
15180 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15182, __extension__ __PRETTY_FUNCTION__ )) | |||
15181 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15182, __extension__ __PRETTY_FUNCTION__ )) | |||
15182 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 15182, __extension__ __PRETTY_FUNCTION__ )); | |||
15183 | ||||
15184 | RHS = convertVector(RHS.get(), Context.FloatTy, S); | |||
15185 | QualType BinOpResTy = RHS.get()->getType(); | |||
15186 | ||||
15187 | // If Opc is a comparison, ResultType is a vector of shorts. In that case, | |||
15188 | // change BinOpResTy to a vector of ints. | |||
15189 | if (isVector(ResultTy, Context.ShortTy)) | |||
15190 | BinOpResTy = S.GetSignedVectorType(BinOpResTy); | |||
15191 | ||||
15192 | if (IsCompAssign) | |||
15193 | return CompoundAssignOperator::Create(Context, LHS.get(), RHS.get(), Opc, | |||
15194 | ResultTy, VK, OK, OpLoc, FPFeatures, | |||
15195 | BinOpResTy, BinOpResTy); | |||
15196 | ||||
15197 | LHS = convertVector(LHS.get(), Context.FloatTy, S); | |||
15198 | auto *BO = BinaryOperator::Create(Context, LHS.get(), RHS.get(), Opc, | |||
15199 | BinOpResTy, VK, OK, OpLoc, FPFeatures); | |||
15200 | return convertVector(BO, ResultTy->castAs<VectorType>()->getElementType(), S); | |||
15201 | } | |||
15202 | ||||
15203 | static std::pair<ExprResult, ExprResult> | |||
15204 | CorrectDelayedTyposInBinOp(Sema &S, BinaryOperatorKind Opc, Expr *LHSExpr, | |||
15205 | Expr *RHSExpr) { | |||
15206 | ExprResult LHS = LHSExpr, RHS = RHSExpr; | |||
15207 | if (!S.Context.isDependenceAllowed()) { | |||
15208 | // C cannot handle TypoExpr nodes on either side of a binop because it | |||
15209 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
15210 | // been dealt with before checking the operands. | |||
15211 | LHS = S.CorrectDelayedTyposInExpr(LHS); | |||
15212 | RHS = S.CorrectDelayedTyposInExpr( | |||
15213 | RHS, /*InitDecl=*/nullptr, /*RecoverUncorrectedTypos=*/false, | |||
15214 | [Opc, LHS](Expr *E) { | |||
15215 | if (Opc != BO_Assign) | |||
15216 | return ExprResult(E); | |||
15217 | // Avoid correcting the RHS to the same Expr as the LHS. | |||
15218 | Decl *D = getDeclFromExpr(E); | |||
15219 | return (D && D == getDeclFromExpr(LHS.get())) ? ExprError() : E; | |||
15220 | }); | |||
15221 | } | |||
15222 | return std::make_pair(LHS, RHS); | |||
15223 | } | |||
15224 | ||||
15225 | /// Returns true if conversion between vectors of halfs and vectors of floats | |||
15226 | /// is needed. | |||
15227 | static bool needsConversionOfHalfVec(bool OpRequiresConversion, ASTContext &Ctx, | |||
15228 | Expr *E0, Expr *E1 = nullptr) { | |||
15229 | if (!OpRequiresConversion || Ctx.getLangOpts().NativeHalfType || | |||
15230 | Ctx.getTargetInfo().useFP16ConversionIntrinsics()) | |||
15231 | return false; | |||
15232 | ||||
15233 | auto HasVectorOfHalfType = [&Ctx](Expr *E) { | |||
15234 | QualType Ty = E->IgnoreImplicit()->getType(); | |||
15235 | ||||
15236 | // Don't promote half precision neon vectors like float16x4_t in arm_neon.h | |||
15237 | // to vectors of floats. Although the element type of the vectors is __fp16, | |||
15238 | // the vectors shouldn't be treated as storage-only types. See the | |||
15239 | // discussion here: https://reviews.llvm.org/rG825235c140e7 | |||
15240 | if (const VectorType *VT = Ty->getAs<VectorType>()) { | |||
15241 | if (VT->getVectorKind() == VectorType::NeonVector) | |||
15242 | return false; | |||
15243 | return VT->getElementType().getCanonicalType() == Ctx.HalfTy; | |||
15244 | } | |||
15245 | return false; | |||
15246 | }; | |||
15247 | ||||
15248 | return HasVectorOfHalfType(E0) && (!E1 || HasVectorOfHalfType(E1)); | |||
15249 | } | |||
15250 | ||||
15251 | /// CreateBuiltinBinOp - Creates a new built-in binary operation with | |||
15252 | /// operator @p Opc at location @c TokLoc. This routine only supports | |||
15253 | /// built-in operations; ActOnBinOp handles overloaded operators. | |||
15254 | ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc, | |||
15255 | BinaryOperatorKind Opc, | |||
15256 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15257 | if (getLangOpts().CPlusPlus11 && isa<InitListExpr>(RHSExpr)) { | |||
15258 | // The syntax only allows initializer lists on the RHS of assignment, | |||
15259 | // so we don't need to worry about accepting invalid code for | |||
15260 | // non-assignment operators. | |||
15261 | // C++11 5.17p9: | |||
15262 | // The meaning of x = {v} [...] is that of x = T(v) [...]. The meaning | |||
15263 | // of x = {} is x = T(). | |||
15264 | InitializationKind Kind = InitializationKind::CreateDirectList( | |||
15265 | RHSExpr->getBeginLoc(), RHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
15266 | InitializedEntity Entity = | |||
15267 | InitializedEntity::InitializeTemporary(LHSExpr->getType()); | |||
15268 | InitializationSequence InitSeq(*this, Entity, Kind, RHSExpr); | |||
15269 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, RHSExpr); | |||
15270 | if (Init.isInvalid()) | |||
15271 | return Init; | |||
15272 | RHSExpr = Init.get(); | |||
15273 | } | |||
15274 | ||||
15275 | ExprResult LHS = LHSExpr, RHS = RHSExpr; | |||
15276 | QualType ResultTy; // Result type of the binary operator. | |||
15277 | // The following two variables are used for compound assignment operators | |||
15278 | QualType CompLHSTy; // Type of LHS after promotions for computation | |||
15279 | QualType CompResultTy; // Type of computation result | |||
15280 | ExprValueKind VK = VK_PRValue; | |||
15281 | ExprObjectKind OK = OK_Ordinary; | |||
15282 | bool ConvertHalfVec = false; | |||
15283 | ||||
15284 | std::tie(LHS, RHS) = CorrectDelayedTyposInBinOp(*this, Opc, LHSExpr, RHSExpr); | |||
15285 | if (!LHS.isUsable() || !RHS.isUsable()) | |||
15286 | return ExprError(); | |||
15287 | ||||
15288 | if (getLangOpts().OpenCL) { | |||
15289 | QualType LHSTy = LHSExpr->getType(); | |||
15290 | QualType RHSTy = RHSExpr->getType(); | |||
15291 | // OpenCLC v2.0 s6.13.11.1 allows atomic variables to be initialized by | |||
15292 | // the ATOMIC_VAR_INIT macro. | |||
15293 | if (LHSTy->isAtomicType() || RHSTy->isAtomicType()) { | |||
15294 | SourceRange SR(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc()); | |||
15295 | if (BO_Assign == Opc) | |||
15296 | Diag(OpLoc, diag::err_opencl_atomic_init) << 0 << SR; | |||
15297 | else | |||
15298 | ResultTy = InvalidOperands(OpLoc, LHS, RHS); | |||
15299 | return ExprError(); | |||
15300 | } | |||
15301 | ||||
15302 | // OpenCL special types - image, sampler, pipe, and blocks are to be used | |||
15303 | // only with a builtin functions and therefore should be disallowed here. | |||
15304 | if (LHSTy->isImageType() || RHSTy->isImageType() || | |||
15305 | LHSTy->isSamplerT() || RHSTy->isSamplerT() || | |||
15306 | LHSTy->isPipeType() || RHSTy->isPipeType() || | |||
15307 | LHSTy->isBlockPointerType() || RHSTy->isBlockPointerType()) { | |||
15308 | ResultTy = InvalidOperands(OpLoc, LHS, RHS); | |||
15309 | return ExprError(); | |||
15310 | } | |||
15311 | } | |||
15312 | ||||
15313 | checkTypeSupport(LHSExpr->getType(), OpLoc, /*ValueDecl*/ nullptr); | |||
15314 | checkTypeSupport(RHSExpr->getType(), OpLoc, /*ValueDecl*/ nullptr); | |||
15315 | ||||
15316 | switch (Opc) { | |||
15317 | case BO_Assign: | |||
15318 | ResultTy = CheckAssignmentOperands(LHS.get(), RHS, OpLoc, QualType(), Opc); | |||
15319 | if (getLangOpts().CPlusPlus && | |||
15320 | LHS.get()->getObjectKind() != OK_ObjCProperty) { | |||
15321 | VK = LHS.get()->getValueKind(); | |||
15322 | OK = LHS.get()->getObjectKind(); | |||
15323 | } | |||
15324 | if (!ResultTy.isNull()) { | |||
15325 | DiagnoseSelfAssignment(*this, LHS.get(), RHS.get(), OpLoc, true); | |||
15326 | DiagnoseSelfMove(LHS.get(), RHS.get(), OpLoc); | |||
15327 | ||||
15328 | // Avoid copying a block to the heap if the block is assigned to a local | |||
15329 | // auto variable that is declared in the same scope as the block. This | |||
15330 | // optimization is unsafe if the local variable is declared in an outer | |||
15331 | // scope. For example: | |||
15332 | // | |||
15333 | // BlockTy b; | |||
15334 | // { | |||
15335 | // b = ^{...}; | |||
15336 | // } | |||
15337 | // // It is unsafe to invoke the block here if it wasn't copied to the | |||
15338 | // // heap. | |||
15339 | // b(); | |||
15340 | ||||
15341 | if (auto *BE = dyn_cast<BlockExpr>(RHS.get()->IgnoreParens())) | |||
15342 | if (auto *DRE = dyn_cast<DeclRefExpr>(LHS.get()->IgnoreParens())) | |||
15343 | if (auto *VD = dyn_cast<VarDecl>(DRE->getDecl())) | |||
15344 | if (VD->hasLocalStorage() && getCurScope()->isDeclScope(VD)) | |||
15345 | BE->getBlockDecl()->setCanAvoidCopyToHeap(); | |||
15346 | ||||
15347 | if (LHS.get()->getType().hasNonTrivialToPrimitiveCopyCUnion()) | |||
15348 | checkNonTrivialCUnion(LHS.get()->getType(), LHS.get()->getExprLoc(), | |||
15349 | NTCUC_Assignment, NTCUK_Copy); | |||
15350 | } | |||
15351 | RecordModifiableNonNullParam(*this, LHS.get()); | |||
15352 | break; | |||
15353 | case BO_PtrMemD: | |||
15354 | case BO_PtrMemI: | |||
15355 | ResultTy = CheckPointerToMemberOperands(LHS, RHS, VK, OpLoc, | |||
15356 | Opc == BO_PtrMemI); | |||
15357 | break; | |||
15358 | case BO_Mul: | |||
15359 | case BO_Div: | |||
15360 | ConvertHalfVec = true; | |||
15361 | ResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, false, | |||
15362 | Opc == BO_Div); | |||
15363 | break; | |||
15364 | case BO_Rem: | |||
15365 | ResultTy = CheckRemainderOperands(LHS, RHS, OpLoc); | |||
15366 | break; | |||
15367 | case BO_Add: | |||
15368 | ConvertHalfVec = true; | |||
15369 | ResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc); | |||
15370 | break; | |||
15371 | case BO_Sub: | |||
15372 | ConvertHalfVec = true; | |||
15373 | ResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc); | |||
15374 | break; | |||
15375 | case BO_Shl: | |||
15376 | case BO_Shr: | |||
15377 | ResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc); | |||
15378 | break; | |||
15379 | case BO_LE: | |||
15380 | case BO_LT: | |||
15381 | case BO_GE: | |||
15382 | case BO_GT: | |||
15383 | ConvertHalfVec = true; | |||
15384 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
15385 | break; | |||
15386 | case BO_EQ: | |||
15387 | case BO_NE: | |||
15388 | ConvertHalfVec = true; | |||
15389 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
15390 | break; | |||
15391 | case BO_Cmp: | |||
15392 | ConvertHalfVec = true; | |||
15393 | ResultTy = CheckCompareOperands(LHS, RHS, OpLoc, Opc); | |||
15394 | assert(ResultTy.isNull() || ResultTy->getAsCXXRecordDecl())(static_cast <bool> (ResultTy.isNull() || ResultTy-> getAsCXXRecordDecl()) ? void (0) : __assert_fail ("ResultTy.isNull() || ResultTy->getAsCXXRecordDecl()" , "clang/lib/Sema/SemaExpr.cpp", 15394, __extension__ __PRETTY_FUNCTION__ )); | |||
15395 | break; | |||
15396 | case BO_And: | |||
15397 | checkObjCPointerIntrospection(*this, LHS, RHS, OpLoc); | |||
15398 | [[fallthrough]]; | |||
15399 | case BO_Xor: | |||
15400 | case BO_Or: | |||
15401 | ResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc, Opc); | |||
15402 | break; | |||
15403 | case BO_LAnd: | |||
15404 | case BO_LOr: | |||
15405 | ConvertHalfVec = true; | |||
15406 | ResultTy = CheckLogicalOperands(LHS, RHS, OpLoc, Opc); | |||
15407 | break; | |||
15408 | case BO_MulAssign: | |||
15409 | case BO_DivAssign: | |||
15410 | ConvertHalfVec = true; | |||
15411 | CompResultTy = CheckMultiplyDivideOperands(LHS, RHS, OpLoc, true, | |||
15412 | Opc == BO_DivAssign); | |||
15413 | CompLHSTy = CompResultTy; | |||
15414 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15415 | ResultTy = | |||
15416 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15417 | break; | |||
15418 | case BO_RemAssign: | |||
15419 | CompResultTy = CheckRemainderOperands(LHS, RHS, OpLoc, true); | |||
15420 | CompLHSTy = CompResultTy; | |||
15421 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15422 | ResultTy = | |||
15423 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15424 | break; | |||
15425 | case BO_AddAssign: | |||
15426 | ConvertHalfVec = true; | |||
15427 | CompResultTy = CheckAdditionOperands(LHS, RHS, OpLoc, Opc, &CompLHSTy); | |||
15428 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15429 | ResultTy = | |||
15430 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15431 | break; | |||
15432 | case BO_SubAssign: | |||
15433 | ConvertHalfVec = true; | |||
15434 | CompResultTy = CheckSubtractionOperands(LHS, RHS, OpLoc, &CompLHSTy); | |||
15435 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15436 | ResultTy = | |||
15437 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15438 | break; | |||
15439 | case BO_ShlAssign: | |||
15440 | case BO_ShrAssign: | |||
15441 | CompResultTy = CheckShiftOperands(LHS, RHS, OpLoc, Opc, true); | |||
15442 | CompLHSTy = CompResultTy; | |||
15443 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15444 | ResultTy = | |||
15445 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15446 | break; | |||
15447 | case BO_AndAssign: | |||
15448 | case BO_OrAssign: // fallthrough | |||
15449 | DiagnoseSelfAssignment(*this, LHS.get(), RHS.get(), OpLoc, true); | |||
15450 | [[fallthrough]]; | |||
15451 | case BO_XorAssign: | |||
15452 | CompResultTy = CheckBitwiseOperands(LHS, RHS, OpLoc, Opc); | |||
15453 | CompLHSTy = CompResultTy; | |||
15454 | if (!CompResultTy.isNull() && !LHS.isInvalid() && !RHS.isInvalid()) | |||
15455 | ResultTy = | |||
15456 | CheckAssignmentOperands(LHS.get(), RHS, OpLoc, CompResultTy, Opc); | |||
15457 | break; | |||
15458 | case BO_Comma: | |||
15459 | ResultTy = CheckCommaOperands(*this, LHS, RHS, OpLoc); | |||
15460 | if (getLangOpts().CPlusPlus && !RHS.isInvalid()) { | |||
15461 | VK = RHS.get()->getValueKind(); | |||
15462 | OK = RHS.get()->getObjectKind(); | |||
15463 | } | |||
15464 | break; | |||
15465 | } | |||
15466 | if (ResultTy.isNull() || LHS.isInvalid() || RHS.isInvalid()) | |||
15467 | return ExprError(); | |||
15468 | ||||
15469 | // Some of the binary operations require promoting operands of half vector to | |||
15470 | // float vectors and truncating the result back to half vector. For now, we do | |||
15471 | // this only when HalfArgsAndReturn is set (that is, when the target is arm or | |||
15472 | // arm64). | |||
15473 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15476, __extension__ __PRETTY_FUNCTION__ )) | |||
15474 | (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\"" , "clang/lib/Sema/SemaExpr.cpp", 15476, __extension__ __PRETTY_FUNCTION__ )) | |||
15475 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 15476, __extension__ __PRETTY_FUNCTION__ )) | |||
15476 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 15476, __extension__ __PRETTY_FUNCTION__ )); | |||
15477 | ConvertHalfVec = | |||
15478 | needsConversionOfHalfVec(ConvertHalfVec, Context, LHS.get(), RHS.get()); | |||
15479 | ||||
15480 | // Check for array bounds violations for both sides of the BinaryOperator | |||
15481 | CheckArrayAccess(LHS.get()); | |||
15482 | CheckArrayAccess(RHS.get()); | |||
15483 | ||||
15484 | if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(LHS.get()->IgnoreParenCasts())) { | |||
15485 | NamedDecl *ObjectSetClass = LookupSingleName(TUScope, | |||
15486 | &Context.Idents.get("object_setClass"), | |||
15487 | SourceLocation(), LookupOrdinaryName); | |||
15488 | if (ObjectSetClass && isa<ObjCIsaExpr>(LHS.get())) { | |||
15489 | SourceLocation RHSLocEnd = getLocForEndOfToken(RHS.get()->getEndLoc()); | |||
15490 | Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign) | |||
15491 | << FixItHint::CreateInsertion(LHS.get()->getBeginLoc(), | |||
15492 | "object_setClass(") | |||
15493 | << FixItHint::CreateReplacement(SourceRange(OISA->getOpLoc(), OpLoc), | |||
15494 | ",") | |||
15495 | << FixItHint::CreateInsertion(RHSLocEnd, ")"); | |||
15496 | } | |||
15497 | else | |||
15498 | Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign); | |||
15499 | } | |||
15500 | else if (const ObjCIvarRefExpr *OIRE = | |||
15501 | dyn_cast<ObjCIvarRefExpr>(LHS.get()->IgnoreParenCasts())) | |||
15502 | DiagnoseDirectIsaAccess(*this, OIRE, OpLoc, RHS.get()); | |||
15503 | ||||
15504 | // Opc is not a compound assignment if CompResultTy is null. | |||
15505 | if (CompResultTy.isNull()) { | |||
15506 | if (ConvertHalfVec) | |||
15507 | return convertHalfVecBinOp(*this, LHS, RHS, Opc, ResultTy, VK, OK, false, | |||
15508 | OpLoc, CurFPFeatureOverrides()); | |||
15509 | return BinaryOperator::Create(Context, LHS.get(), RHS.get(), Opc, ResultTy, | |||
15510 | VK, OK, OpLoc, CurFPFeatureOverrides()); | |||
15511 | } | |||
15512 | ||||
15513 | // Handle compound assignments. | |||
15514 | if (getLangOpts().CPlusPlus && LHS.get()->getObjectKind() != | |||
15515 | OK_ObjCProperty) { | |||
15516 | VK = VK_LValue; | |||
15517 | OK = LHS.get()->getObjectKind(); | |||
15518 | } | |||
15519 | ||||
15520 | // The LHS is not converted to the result type for fixed-point compound | |||
15521 | // assignment as the common type is computed on demand. Reset the CompLHSTy | |||
15522 | // to the LHS type we would have gotten after unary conversions. | |||
15523 | if (CompResultTy->isFixedPointType()) | |||
15524 | CompLHSTy = UsualUnaryConversions(LHS.get()).get()->getType(); | |||
15525 | ||||
15526 | if (ConvertHalfVec) | |||
15527 | return convertHalfVecBinOp(*this, LHS, RHS, Opc, ResultTy, VK, OK, true, | |||
15528 | OpLoc, CurFPFeatureOverrides()); | |||
15529 | ||||
15530 | return CompoundAssignOperator::Create( | |||
15531 | Context, LHS.get(), RHS.get(), Opc, ResultTy, VK, OK, OpLoc, | |||
15532 | CurFPFeatureOverrides(), CompLHSTy, CompResultTy); | |||
15533 | } | |||
15534 | ||||
15535 | /// DiagnoseBitwisePrecedence - Emit a warning when bitwise and comparison | |||
15536 | /// operators are mixed in a way that suggests that the programmer forgot that | |||
15537 | /// comparison operators have higher precedence. The most typical example of | |||
15538 | /// such code is "flags & 0x0020 != 0", which is equivalent to "flags & 1". | |||
15539 | static void DiagnoseBitwisePrecedence(Sema &Self, BinaryOperatorKind Opc, | |||
15540 | SourceLocation OpLoc, Expr *LHSExpr, | |||
15541 | Expr *RHSExpr) { | |||
15542 | BinaryOperator *LHSBO = dyn_cast<BinaryOperator>(LHSExpr); | |||
15543 | BinaryOperator *RHSBO = dyn_cast<BinaryOperator>(RHSExpr); | |||
15544 | ||||
15545 | // Check that one of the sides is a comparison operator and the other isn't. | |||
15546 | bool isLeftComp = LHSBO && LHSBO->isComparisonOp(); | |||
15547 | bool isRightComp = RHSBO && RHSBO->isComparisonOp(); | |||
15548 | if (isLeftComp == isRightComp) | |||
15549 | return; | |||
15550 | ||||
15551 | // Bitwise operations are sometimes used as eager logical ops. | |||
15552 | // Don't diagnose this. | |||
15553 | bool isLeftBitwise = LHSBO && LHSBO->isBitwiseOp(); | |||
15554 | bool isRightBitwise = RHSBO && RHSBO->isBitwiseOp(); | |||
15555 | if (isLeftBitwise || isRightBitwise) | |||
15556 | return; | |||
15557 | ||||
15558 | SourceRange DiagRange = isLeftComp | |||
15559 | ? SourceRange(LHSExpr->getBeginLoc(), OpLoc) | |||
15560 | : SourceRange(OpLoc, RHSExpr->getEndLoc()); | |||
15561 | StringRef OpStr = isLeftComp ? LHSBO->getOpcodeStr() : RHSBO->getOpcodeStr(); | |||
15562 | SourceRange ParensRange = | |||
15563 | isLeftComp | |||
15564 | ? SourceRange(LHSBO->getRHS()->getBeginLoc(), RHSExpr->getEndLoc()) | |||
15565 | : SourceRange(LHSExpr->getBeginLoc(), RHSBO->getLHS()->getEndLoc()); | |||
15566 | ||||
15567 | Self.Diag(OpLoc, diag::warn_precedence_bitwise_rel) | |||
15568 | << DiagRange << BinaryOperator::getOpcodeStr(Opc) << OpStr; | |||
15569 | SuggestParentheses(Self, OpLoc, | |||
15570 | Self.PDiag(diag::note_precedence_silence) << OpStr, | |||
15571 | (isLeftComp ? LHSExpr : RHSExpr)->getSourceRange()); | |||
15572 | SuggestParentheses(Self, OpLoc, | |||
15573 | Self.PDiag(diag::note_precedence_bitwise_first) | |||
15574 | << BinaryOperator::getOpcodeStr(Opc), | |||
15575 | ParensRange); | |||
15576 | } | |||
15577 | ||||
15578 | /// It accepts a '&&' expr that is inside a '||' one. | |||
15579 | /// Emit a diagnostic together with a fixit hint that wraps the '&&' expression | |||
15580 | /// in parentheses. | |||
15581 | static void | |||
15582 | EmitDiagnosticForLogicalAndInLogicalOr(Sema &Self, SourceLocation OpLoc, | |||
15583 | BinaryOperator *Bop) { | |||
15584 | assert(Bop->getOpcode() == BO_LAnd)(static_cast <bool> (Bop->getOpcode() == BO_LAnd) ? void (0) : __assert_fail ("Bop->getOpcode() == BO_LAnd", "clang/lib/Sema/SemaExpr.cpp" , 15584, __extension__ __PRETTY_FUNCTION__)); | |||
15585 | Self.Diag(Bop->getOperatorLoc(), diag::warn_logical_and_in_logical_or) | |||
15586 | << Bop->getSourceRange() << OpLoc; | |||
15587 | SuggestParentheses(Self, Bop->getOperatorLoc(), | |||
15588 | Self.PDiag(diag::note_precedence_silence) | |||
15589 | << Bop->getOpcodeStr(), | |||
15590 | Bop->getSourceRange()); | |||
15591 | } | |||
15592 | ||||
15593 | /// Look for '&&' in the left hand of a '||' expr. | |||
15594 | static void DiagnoseLogicalAndInLogicalOrLHS(Sema &S, SourceLocation OpLoc, | |||
15595 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15596 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(LHSExpr)) { | |||
15597 | if (Bop->getOpcode() == BO_LAnd) { | |||
15598 | // If it's "string_literal && a || b" don't warn since the precedence | |||
15599 | // doesn't matter. | |||
15600 | if (!isa<StringLiteral>(Bop->getLHS()->IgnoreParenImpCasts())) | |||
15601 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop); | |||
15602 | } else if (Bop->getOpcode() == BO_LOr) { | |||
15603 | if (BinaryOperator *RBop = dyn_cast<BinaryOperator>(Bop->getRHS())) { | |||
15604 | // If it's "a || b && string_literal || c" we didn't warn earlier for | |||
15605 | // "a || b && string_literal", but warn now. | |||
15606 | if (RBop->getOpcode() == BO_LAnd && | |||
15607 | isa<StringLiteral>(RBop->getRHS()->IgnoreParenImpCasts())) | |||
15608 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, RBop); | |||
15609 | } | |||
15610 | } | |||
15611 | } | |||
15612 | } | |||
15613 | ||||
15614 | /// Look for '&&' in the right hand of a '||' expr. | |||
15615 | static void DiagnoseLogicalAndInLogicalOrRHS(Sema &S, SourceLocation OpLoc, | |||
15616 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15617 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(RHSExpr)) { | |||
15618 | if (Bop->getOpcode() == BO_LAnd) { | |||
15619 | // If it's "a || b && string_literal" don't warn since the precedence | |||
15620 | // doesn't matter. | |||
15621 | if (!isa<StringLiteral>(Bop->getRHS()->IgnoreParenImpCasts())) | |||
15622 | return EmitDiagnosticForLogicalAndInLogicalOr(S, OpLoc, Bop); | |||
15623 | } | |||
15624 | } | |||
15625 | } | |||
15626 | ||||
15627 | /// Look for bitwise op in the left or right hand of a bitwise op with | |||
15628 | /// lower precedence and emit a diagnostic together with a fixit hint that wraps | |||
15629 | /// the '&' expression in parentheses. | |||
15630 | static void DiagnoseBitwiseOpInBitwiseOp(Sema &S, BinaryOperatorKind Opc, | |||
15631 | SourceLocation OpLoc, Expr *SubExpr) { | |||
15632 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(SubExpr)) { | |||
15633 | if (Bop->isBitwiseOp() && Bop->getOpcode() < Opc) { | |||
15634 | S.Diag(Bop->getOperatorLoc(), diag::warn_bitwise_op_in_bitwise_op) | |||
15635 | << Bop->getOpcodeStr() << BinaryOperator::getOpcodeStr(Opc) | |||
15636 | << Bop->getSourceRange() << OpLoc; | |||
15637 | SuggestParentheses(S, Bop->getOperatorLoc(), | |||
15638 | S.PDiag(diag::note_precedence_silence) | |||
15639 | << Bop->getOpcodeStr(), | |||
15640 | Bop->getSourceRange()); | |||
15641 | } | |||
15642 | } | |||
15643 | } | |||
15644 | ||||
15645 | static void DiagnoseAdditionInShift(Sema &S, SourceLocation OpLoc, | |||
15646 | Expr *SubExpr, StringRef Shift) { | |||
15647 | if (BinaryOperator *Bop = dyn_cast<BinaryOperator>(SubExpr)) { | |||
15648 | if (Bop->getOpcode() == BO_Add || Bop->getOpcode() == BO_Sub) { | |||
15649 | StringRef Op = Bop->getOpcodeStr(); | |||
15650 | S.Diag(Bop->getOperatorLoc(), diag::warn_addition_in_bitshift) | |||
15651 | << Bop->getSourceRange() << OpLoc << Shift << Op; | |||
15652 | SuggestParentheses(S, Bop->getOperatorLoc(), | |||
15653 | S.PDiag(diag::note_precedence_silence) << Op, | |||
15654 | Bop->getSourceRange()); | |||
15655 | } | |||
15656 | } | |||
15657 | } | |||
15658 | ||||
15659 | static void DiagnoseShiftCompare(Sema &S, SourceLocation OpLoc, | |||
15660 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15661 | CXXOperatorCallExpr *OCE = dyn_cast<CXXOperatorCallExpr>(LHSExpr); | |||
15662 | if (!OCE) | |||
15663 | return; | |||
15664 | ||||
15665 | FunctionDecl *FD = OCE->getDirectCallee(); | |||
15666 | if (!FD || !FD->isOverloadedOperator()) | |||
15667 | return; | |||
15668 | ||||
15669 | OverloadedOperatorKind Kind = FD->getOverloadedOperator(); | |||
15670 | if (Kind != OO_LessLess && Kind != OO_GreaterGreater) | |||
15671 | return; | |||
15672 | ||||
15673 | S.Diag(OpLoc, diag::warn_overloaded_shift_in_comparison) | |||
15674 | << LHSExpr->getSourceRange() << RHSExpr->getSourceRange() | |||
15675 | << (Kind == OO_LessLess); | |||
15676 | SuggestParentheses(S, OCE->getOperatorLoc(), | |||
15677 | S.PDiag(diag::note_precedence_silence) | |||
15678 | << (Kind == OO_LessLess ? "<<" : ">>"), | |||
15679 | OCE->getSourceRange()); | |||
15680 | SuggestParentheses( | |||
15681 | S, OpLoc, S.PDiag(diag::note_evaluate_comparison_first), | |||
15682 | SourceRange(OCE->getArg(1)->getBeginLoc(), RHSExpr->getEndLoc())); | |||
15683 | } | |||
15684 | ||||
15685 | /// DiagnoseBinOpPrecedence - Emit warnings for expressions with tricky | |||
15686 | /// precedence. | |||
15687 | static void DiagnoseBinOpPrecedence(Sema &Self, BinaryOperatorKind Opc, | |||
15688 | SourceLocation OpLoc, Expr *LHSExpr, | |||
15689 | Expr *RHSExpr){ | |||
15690 | // Diagnose "arg1 'bitwise' arg2 'eq' arg3". | |||
15691 | if (BinaryOperator::isBitwiseOp(Opc)) | |||
15692 | DiagnoseBitwisePrecedence(Self, Opc, OpLoc, LHSExpr, RHSExpr); | |||
15693 | ||||
15694 | // Diagnose "arg1 & arg2 | arg3" | |||
15695 | if ((Opc == BO_Or || Opc == BO_Xor) && | |||
15696 | !OpLoc.isMacroID()/* Don't warn in macros. */) { | |||
15697 | DiagnoseBitwiseOpInBitwiseOp(Self, Opc, OpLoc, LHSExpr); | |||
15698 | DiagnoseBitwiseOpInBitwiseOp(Self, Opc, OpLoc, RHSExpr); | |||
15699 | } | |||
15700 | ||||
15701 | // Warn about arg1 || arg2 && arg3, as GCC 4.3+ does. | |||
15702 | // We don't warn for 'assert(a || b && "bad")' since this is safe. | |||
15703 | if (Opc == BO_LOr && !OpLoc.isMacroID()/* Don't warn in macros. */) { | |||
15704 | DiagnoseLogicalAndInLogicalOrLHS(Self, OpLoc, LHSExpr, RHSExpr); | |||
15705 | DiagnoseLogicalAndInLogicalOrRHS(Self, OpLoc, LHSExpr, RHSExpr); | |||
15706 | } | |||
15707 | ||||
15708 | if ((Opc == BO_Shl && LHSExpr->getType()->isIntegralType(Self.getASTContext())) | |||
15709 | || Opc == BO_Shr) { | |||
15710 | StringRef Shift = BinaryOperator::getOpcodeStr(Opc); | |||
15711 | DiagnoseAdditionInShift(Self, OpLoc, LHSExpr, Shift); | |||
15712 | DiagnoseAdditionInShift(Self, OpLoc, RHSExpr, Shift); | |||
15713 | } | |||
15714 | ||||
15715 | // Warn on overloaded shift operators and comparisons, such as: | |||
15716 | // cout << 5 == 4; | |||
15717 | if (BinaryOperator::isComparisonOp(Opc)) | |||
15718 | DiagnoseShiftCompare(Self, OpLoc, LHSExpr, RHSExpr); | |||
15719 | } | |||
15720 | ||||
15721 | // Binary Operators. 'Tok' is the token for the operator. | |||
15722 | ExprResult Sema::ActOnBinOp(Scope *S, SourceLocation TokLoc, | |||
15723 | tok::TokenKind Kind, | |||
15724 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15725 | BinaryOperatorKind Opc = ConvertTokenKindToBinaryOpcode(Kind); | |||
15726 | assert(LHSExpr && "ActOnBinOp(): missing left expression")(static_cast <bool> (LHSExpr && "ActOnBinOp(): missing left expression" ) ? void (0) : __assert_fail ("LHSExpr && \"ActOnBinOp(): missing left expression\"" , "clang/lib/Sema/SemaExpr.cpp", 15726, __extension__ __PRETTY_FUNCTION__ )); | |||
15727 | assert(RHSExpr && "ActOnBinOp(): missing right expression")(static_cast <bool> (RHSExpr && "ActOnBinOp(): missing right expression" ) ? void (0) : __assert_fail ("RHSExpr && \"ActOnBinOp(): missing right expression\"" , "clang/lib/Sema/SemaExpr.cpp", 15727, __extension__ __PRETTY_FUNCTION__ )); | |||
15728 | ||||
15729 | // Emit warnings for tricky precedence issues, e.g. "bitfield & 0x4 == 0" | |||
15730 | DiagnoseBinOpPrecedence(*this, Opc, TokLoc, LHSExpr, RHSExpr); | |||
15731 | ||||
15732 | return BuildBinOp(S, TokLoc, Opc, LHSExpr, RHSExpr); | |||
15733 | } | |||
15734 | ||||
15735 | void Sema::LookupBinOp(Scope *S, SourceLocation OpLoc, BinaryOperatorKind Opc, | |||
15736 | UnresolvedSetImpl &Functions) { | |||
15737 | OverloadedOperatorKind OverOp = BinaryOperator::getOverloadedOperator(Opc); | |||
15738 | if (OverOp != OO_None && OverOp != OO_Equal) | |||
15739 | LookupOverloadedOperatorName(OverOp, S, Functions); | |||
15740 | ||||
15741 | // In C++20 onwards, we may have a second operator to look up. | |||
15742 | if (getLangOpts().CPlusPlus20) { | |||
15743 | if (OverloadedOperatorKind ExtraOp = getRewrittenOverloadedOperator(OverOp)) | |||
15744 | LookupOverloadedOperatorName(ExtraOp, S, Functions); | |||
15745 | } | |||
15746 | } | |||
15747 | ||||
15748 | /// Build an overloaded binary operator expression in the given scope. | |||
15749 | static ExprResult BuildOverloadedBinOp(Sema &S, Scope *Sc, SourceLocation OpLoc, | |||
15750 | BinaryOperatorKind Opc, | |||
15751 | Expr *LHS, Expr *RHS) { | |||
15752 | switch (Opc) { | |||
15753 | case BO_Assign: | |||
15754 | // In the non-overloaded case, we warn about self-assignment (x = x) for | |||
15755 | // both simple assignment and certain compound assignments where algebra | |||
15756 | // tells us the operation yields a constant result. When the operator is | |||
15757 | // overloaded, we can't do the latter because we don't want to assume that | |||
15758 | // those algebraic identities still apply; for example, a path-building | |||
15759 | // library might use operator/= to append paths. But it's still reasonable | |||
15760 | // to assume that simple assignment is just moving/copying values around | |||
15761 | // and so self-assignment is likely a bug. | |||
15762 | DiagnoseSelfAssignment(S, LHS, RHS, OpLoc, false); | |||
15763 | [[fallthrough]]; | |||
15764 | case BO_DivAssign: | |||
15765 | case BO_RemAssign: | |||
15766 | case BO_SubAssign: | |||
15767 | case BO_AndAssign: | |||
15768 | case BO_OrAssign: | |||
15769 | case BO_XorAssign: | |||
15770 | CheckIdentityFieldAssignment(LHS, RHS, OpLoc, S); | |||
15771 | break; | |||
15772 | default: | |||
15773 | break; | |||
15774 | } | |||
15775 | ||||
15776 | // Find all of the overloaded operators visible from this point. | |||
15777 | UnresolvedSet<16> Functions; | |||
15778 | S.LookupBinOp(Sc, OpLoc, Opc, Functions); | |||
15779 | ||||
15780 | // Build the (potentially-overloaded, potentially-dependent) | |||
15781 | // binary operation. | |||
15782 | return S.CreateOverloadedBinOp(OpLoc, Opc, Functions, LHS, RHS); | |||
15783 | } | |||
15784 | ||||
15785 | ExprResult Sema::BuildBinOp(Scope *S, SourceLocation OpLoc, | |||
15786 | BinaryOperatorKind Opc, | |||
15787 | Expr *LHSExpr, Expr *RHSExpr) { | |||
15788 | ExprResult LHS, RHS; | |||
15789 | std::tie(LHS, RHS) = CorrectDelayedTyposInBinOp(*this, Opc, LHSExpr, RHSExpr); | |||
15790 | if (!LHS.isUsable() || !RHS.isUsable()) | |||
15791 | return ExprError(); | |||
15792 | LHSExpr = LHS.get(); | |||
15793 | RHSExpr = RHS.get(); | |||
15794 | ||||
15795 | // We want to end up calling one of checkPseudoObjectAssignment | |||
15796 | // (if the LHS is a pseudo-object), BuildOverloadedBinOp (if | |||
15797 | // both expressions are overloadable or either is type-dependent), | |||
15798 | // or CreateBuiltinBinOp (in any other case). We also want to get | |||
15799 | // any placeholder types out of the way. | |||
15800 | ||||
15801 | // Handle pseudo-objects in the LHS. | |||
15802 | if (const BuiltinType *pty = LHSExpr->getType()->getAsPlaceholderType()) { | |||
15803 | // Assignments with a pseudo-object l-value need special analysis. | |||
15804 | if (pty->getKind() == BuiltinType::PseudoObject && | |||
15805 | BinaryOperator::isAssignmentOp(Opc)) | |||
15806 | return checkPseudoObjectAssignment(S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15807 | ||||
15808 | // Don't resolve overloads if the other type is overloadable. | |||
15809 | if (getLangOpts().CPlusPlus && pty->getKind() == BuiltinType::Overload) { | |||
15810 | // We can't actually test that if we still have a placeholder, | |||
15811 | // though. Fortunately, none of the exceptions we see in that | |||
15812 | // code below are valid when the LHS is an overload set. Note | |||
15813 | // that an overload set can be dependently-typed, but it never | |||
15814 | // instantiates to having an overloadable type. | |||
15815 | ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr); | |||
15816 | if (resolvedRHS.isInvalid()) return ExprError(); | |||
15817 | RHSExpr = resolvedRHS.get(); | |||
15818 | ||||
15819 | if (RHSExpr->isTypeDependent() || | |||
15820 | RHSExpr->getType()->isOverloadableType()) | |||
15821 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15822 | } | |||
15823 | ||||
15824 | // If we're instantiating "a.x < b" or "A::x < b" and 'x' names a function | |||
15825 | // template, diagnose the missing 'template' keyword instead of diagnosing | |||
15826 | // an invalid use of a bound member function. | |||
15827 | // | |||
15828 | // Note that "A::x < b" might be valid if 'b' has an overloadable type due | |||
15829 | // to C++1z [over.over]/1.4, but we already checked for that case above. | |||
15830 | if (Opc == BO_LT && inTemplateInstantiation() && | |||
15831 | (pty->getKind() == BuiltinType::BoundMember || | |||
15832 | pty->getKind() == BuiltinType::Overload)) { | |||
15833 | auto *OE = dyn_cast<OverloadExpr>(LHSExpr); | |||
15834 | if (OE && !OE->hasTemplateKeyword() && !OE->hasExplicitTemplateArgs() && | |||
15835 | llvm::any_of(OE->decls(), [](NamedDecl *ND) { | |||
15836 | return isa<FunctionTemplateDecl>(ND); | |||
15837 | })) { | |||
15838 | Diag(OE->getQualifier() ? OE->getQualifierLoc().getBeginLoc() | |||
15839 | : OE->getNameLoc(), | |||
15840 | diag::err_template_kw_missing) | |||
15841 | << OE->getName().getAsString() << ""; | |||
15842 | return ExprError(); | |||
15843 | } | |||
15844 | } | |||
15845 | ||||
15846 | ExprResult LHS = CheckPlaceholderExpr(LHSExpr); | |||
15847 | if (LHS.isInvalid()) return ExprError(); | |||
15848 | LHSExpr = LHS.get(); | |||
15849 | } | |||
15850 | ||||
15851 | // Handle pseudo-objects in the RHS. | |||
15852 | if (const BuiltinType *pty = RHSExpr->getType()->getAsPlaceholderType()) { | |||
15853 | // An overload in the RHS can potentially be resolved by the type | |||
15854 | // being assigned to. | |||
15855 | if (Opc == BO_Assign && pty->getKind() == BuiltinType::Overload) { | |||
15856 | if (getLangOpts().CPlusPlus && | |||
15857 | (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent() || | |||
15858 | LHSExpr->getType()->isOverloadableType())) | |||
15859 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15860 | ||||
15861 | return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr); | |||
15862 | } | |||
15863 | ||||
15864 | // Don't resolve overloads if the other type is overloadable. | |||
15865 | if (getLangOpts().CPlusPlus && pty->getKind() == BuiltinType::Overload && | |||
15866 | LHSExpr->getType()->isOverloadableType()) | |||
15867 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15868 | ||||
15869 | ExprResult resolvedRHS = CheckPlaceholderExpr(RHSExpr); | |||
15870 | if (!resolvedRHS.isUsable()) return ExprError(); | |||
15871 | RHSExpr = resolvedRHS.get(); | |||
15872 | } | |||
15873 | ||||
15874 | if (getLangOpts().CPlusPlus) { | |||
15875 | // If either expression is type-dependent, always build an | |||
15876 | // overloaded op. | |||
15877 | if (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent()) | |||
15878 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15879 | ||||
15880 | // Otherwise, build an overloaded op if either expression has an | |||
15881 | // overloadable type. | |||
15882 | if (LHSExpr->getType()->isOverloadableType() || | |||
15883 | RHSExpr->getType()->isOverloadableType()) | |||
15884 | return BuildOverloadedBinOp(*this, S, OpLoc, Opc, LHSExpr, RHSExpr); | |||
15885 | } | |||
15886 | ||||
15887 | if (getLangOpts().RecoveryAST && | |||
15888 | (LHSExpr->isTypeDependent() || RHSExpr->isTypeDependent())) { | |||
15889 | assert(!getLangOpts().CPlusPlus)(static_cast <bool> (!getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("!getLangOpts().CPlusPlus", "clang/lib/Sema/SemaExpr.cpp" , 15889, __extension__ __PRETTY_FUNCTION__)); | |||
15890 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 15891, __extension__ __PRETTY_FUNCTION__ )) | |||
15891 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 15891, __extension__ __PRETTY_FUNCTION__ )); | |||
15892 | if (BinaryOperator::isCompoundAssignmentOp(Opc)) | |||
15893 | // C [6.15.16] p3: | |||
15894 | // An assignment expression has the value of the left operand after the | |||
15895 | // assignment, but is not an lvalue. | |||
15896 | return CompoundAssignOperator::Create( | |||
15897 | Context, LHSExpr, RHSExpr, Opc, | |||
15898 | LHSExpr->getType().getUnqualifiedType(), VK_PRValue, OK_Ordinary, | |||
15899 | OpLoc, CurFPFeatureOverrides()); | |||
15900 | QualType ResultType; | |||
15901 | switch (Opc) { | |||
15902 | case BO_Assign: | |||
15903 | ResultType = LHSExpr->getType().getUnqualifiedType(); | |||
15904 | break; | |||
15905 | case BO_LT: | |||
15906 | case BO_GT: | |||
15907 | case BO_LE: | |||
15908 | case BO_GE: | |||
15909 | case BO_EQ: | |||
15910 | case BO_NE: | |||
15911 | case BO_LAnd: | |||
15912 | case BO_LOr: | |||
15913 | // These operators have a fixed result type regardless of operands. | |||
15914 | ResultType = Context.IntTy; | |||
15915 | break; | |||
15916 | case BO_Comma: | |||
15917 | ResultType = RHSExpr->getType(); | |||
15918 | break; | |||
15919 | default: | |||
15920 | ResultType = Context.DependentTy; | |||
15921 | break; | |||
15922 | } | |||
15923 | return BinaryOperator::Create(Context, LHSExpr, RHSExpr, Opc, ResultType, | |||
15924 | VK_PRValue, OK_Ordinary, OpLoc, | |||
15925 | CurFPFeatureOverrides()); | |||
15926 | } | |||
15927 | ||||
15928 | // Build a built-in binary operation. | |||
15929 | return CreateBuiltinBinOp(OpLoc, Opc, LHSExpr, RHSExpr); | |||
15930 | } | |||
15931 | ||||
15932 | static bool isOverflowingIntegerType(ASTContext &Ctx, QualType T) { | |||
15933 | if (T.isNull() || T->isDependentType()) | |||
15934 | return false; | |||
15935 | ||||
15936 | if (!Ctx.isPromotableIntegerType(T)) | |||
15937 | return true; | |||
15938 | ||||
15939 | return Ctx.getIntWidth(T) >= Ctx.getIntWidth(Ctx.IntTy); | |||
15940 | } | |||
15941 | ||||
15942 | ExprResult Sema::CreateBuiltinUnaryOp(SourceLocation OpLoc, | |||
15943 | UnaryOperatorKind Opc, Expr *InputExpr, | |||
15944 | bool IsAfterAmp) { | |||
15945 | ExprResult Input = InputExpr; | |||
15946 | ExprValueKind VK = VK_PRValue; | |||
15947 | ExprObjectKind OK = OK_Ordinary; | |||
15948 | QualType resultType; | |||
15949 | bool CanOverflow = false; | |||
15950 | ||||
15951 | bool ConvertHalfVec = false; | |||
15952 | if (getLangOpts().OpenCL) { | |||
15953 | QualType Ty = InputExpr->getType(); | |||
15954 | // The only legal unary operation for atomics is '&'. | |||
15955 | if ((Opc != UO_AddrOf && Ty->isAtomicType()) || | |||
15956 | // OpenCL special types - image, sampler, pipe, and blocks are to be used | |||
15957 | // only with a builtin functions and therefore should be disallowed here. | |||
15958 | (Ty->isImageType() || Ty->isSamplerT() || Ty->isPipeType() | |||
15959 | || Ty->isBlockPointerType())) { | |||
15960 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
15961 | << InputExpr->getType() | |||
15962 | << Input.get()->getSourceRange()); | |||
15963 | } | |||
15964 | } | |||
15965 | ||||
15966 | if (getLangOpts().HLSL && OpLoc.isValid()) { | |||
15967 | if (Opc == UO_AddrOf) | |||
15968 | return ExprError(Diag(OpLoc, diag::err_hlsl_operator_unsupported) << 0); | |||
15969 | if (Opc == UO_Deref) | |||
15970 | return ExprError(Diag(OpLoc, diag::err_hlsl_operator_unsupported) << 1); | |||
15971 | } | |||
15972 | ||||
15973 | switch (Opc) { | |||
15974 | case UO_PreInc: | |||
15975 | case UO_PreDec: | |||
15976 | case UO_PostInc: | |||
15977 | case UO_PostDec: | |||
15978 | resultType = CheckIncrementDecrementOperand(*this, Input.get(), VK, OK, | |||
15979 | OpLoc, | |||
15980 | Opc == UO_PreInc || | |||
15981 | Opc == UO_PostInc, | |||
15982 | Opc == UO_PreInc || | |||
15983 | Opc == UO_PreDec); | |||
15984 | CanOverflow = isOverflowingIntegerType(Context, resultType); | |||
15985 | break; | |||
15986 | case UO_AddrOf: | |||
15987 | resultType = CheckAddressOfOperand(Input, OpLoc); | |||
15988 | CheckAddressOfNoDeref(InputExpr); | |||
15989 | RecordModifiableNonNullParam(*this, InputExpr); | |||
15990 | break; | |||
15991 | case UO_Deref: { | |||
15992 | Input = DefaultFunctionArrayLvalueConversion(Input.get()); | |||
15993 | if (Input.isInvalid()) return ExprError(); | |||
15994 | resultType = | |||
15995 | CheckIndirectionOperand(*this, Input.get(), VK, OpLoc, IsAfterAmp); | |||
15996 | break; | |||
15997 | } | |||
15998 | case UO_Plus: | |||
15999 | case UO_Minus: | |||
16000 | CanOverflow = Opc == UO_Minus && | |||
16001 | isOverflowingIntegerType(Context, Input.get()->getType()); | |||
16002 | Input = UsualUnaryConversions(Input.get()); | |||
16003 | if (Input.isInvalid()) return ExprError(); | |||
16004 | // Unary plus and minus require promoting an operand of half vector to a | |||
16005 | // float vector and truncating the result back to a half vector. For now, we | |||
16006 | // do this only when HalfArgsAndReturns is set (that is, when the target is | |||
16007 | // arm or arm64). | |||
16008 | ConvertHalfVec = needsConversionOfHalfVec(true, Context, Input.get()); | |||
16009 | ||||
16010 | // If the operand is a half vector, promote it to a float vector. | |||
16011 | if (ConvertHalfVec) | |||
16012 | Input = convertVector(Input.get(), Context.FloatTy, *this); | |||
16013 | resultType = Input.get()->getType(); | |||
16014 | if (resultType->isDependentType()) | |||
16015 | break; | |||
16016 | if (resultType->isArithmeticType()) // C99 6.5.3.3p1 | |||
16017 | break; | |||
16018 | else if (resultType->isVectorType() && | |||
16019 | // The z vector extensions don't allow + or - with bool vectors. | |||
16020 | (!Context.getLangOpts().ZVector || | |||
16021 | resultType->castAs<VectorType>()->getVectorKind() != | |||
16022 | VectorType::AltiVecBool)) | |||
16023 | break; | |||
16024 | else if (resultType->isVLSTBuiltinType()) // SVE vectors allow + and - | |||
16025 | break; | |||
16026 | else if (getLangOpts().CPlusPlus && // C++ [expr.unary.op]p6 | |||
16027 | Opc == UO_Plus && | |||
16028 | resultType->isPointerType()) | |||
16029 | break; | |||
16030 | ||||
16031 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16032 | << resultType << Input.get()->getSourceRange()); | |||
16033 | ||||
16034 | case UO_Not: // bitwise complement | |||
16035 | Input = UsualUnaryConversions(Input.get()); | |||
16036 | if (Input.isInvalid()) | |||
16037 | return ExprError(); | |||
16038 | resultType = Input.get()->getType(); | |||
16039 | if (resultType->isDependentType()) | |||
16040 | break; | |||
16041 | // C99 6.5.3.3p1. We allow complex int and float as a GCC extension. | |||
16042 | if (resultType->isComplexType() || resultType->isComplexIntegerType()) | |||
16043 | // C99 does not support '~' for complex conjugation. | |||
16044 | Diag(OpLoc, diag::ext_integer_complement_complex) | |||
16045 | << resultType << Input.get()->getSourceRange(); | |||
16046 | else if (resultType->hasIntegerRepresentation()) | |||
16047 | break; | |||
16048 | else if (resultType->isExtVectorType() && Context.getLangOpts().OpenCL) { | |||
16049 | // OpenCL v1.1 s6.3.f: The bitwise operator not (~) does not operate | |||
16050 | // on vector float types. | |||
16051 | QualType T = resultType->castAs<ExtVectorType>()->getElementType(); | |||
16052 | if (!T->isIntegerType()) | |||
16053 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16054 | << resultType << Input.get()->getSourceRange()); | |||
16055 | } else { | |||
16056 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16057 | << resultType << Input.get()->getSourceRange()); | |||
16058 | } | |||
16059 | break; | |||
16060 | ||||
16061 | case UO_LNot: // logical negation | |||
16062 | // Unlike +/-/~, integer promotions aren't done here (C99 6.5.3.3p5). | |||
16063 | Input = DefaultFunctionArrayLvalueConversion(Input.get()); | |||
16064 | if (Input.isInvalid()) return ExprError(); | |||
16065 | resultType = Input.get()->getType(); | |||
16066 | ||||
16067 | // Though we still have to promote half FP to float... | |||
16068 | if (resultType->isHalfType() && !Context.getLangOpts().NativeHalfType) { | |||
16069 | Input = ImpCastExprToType(Input.get(), Context.FloatTy, CK_FloatingCast).get(); | |||
16070 | resultType = Context.FloatTy; | |||
16071 | } | |||
16072 | ||||
16073 | if (resultType->isDependentType()) | |||
16074 | break; | |||
16075 | if (resultType->isScalarType() && !isScopedEnumerationType(resultType)) { | |||
16076 | // C99 6.5.3.3p1: ok, fallthrough; | |||
16077 | if (Context.getLangOpts().CPlusPlus) { | |||
16078 | // C++03 [expr.unary.op]p8, C++0x [expr.unary.op]p9: | |||
16079 | // operand contextually converted to bool. | |||
16080 | Input = ImpCastExprToType(Input.get(), Context.BoolTy, | |||
16081 | ScalarTypeToBooleanCastKind(resultType)); | |||
16082 | } else if (Context.getLangOpts().OpenCL && | |||
16083 | Context.getLangOpts().OpenCLVersion < 120) { | |||
16084 | // OpenCL v1.1 6.3.h: The logical operator not (!) does not | |||
16085 | // operate on scalar float types. | |||
16086 | if (!resultType->isIntegerType() && !resultType->isPointerType()) | |||
16087 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16088 | << resultType << Input.get()->getSourceRange()); | |||
16089 | } | |||
16090 | } else if (resultType->isExtVectorType()) { | |||
16091 | if (Context.getLangOpts().OpenCL && | |||
16092 | Context.getLangOpts().getOpenCLCompatibleVersion() < 120) { | |||
16093 | // OpenCL v1.1 6.3.h: The logical operator not (!) does not | |||
16094 | // operate on vector float types. | |||
16095 | QualType T = resultType->castAs<ExtVectorType>()->getElementType(); | |||
16096 | if (!T->isIntegerType()) | |||
16097 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16098 | << resultType << Input.get()->getSourceRange()); | |||
16099 | } | |||
16100 | // Vector logical not returns the signed variant of the operand type. | |||
16101 | resultType = GetSignedVectorType(resultType); | |||
16102 | break; | |||
16103 | } else if (Context.getLangOpts().CPlusPlus && resultType->isVectorType()) { | |||
16104 | const VectorType *VTy = resultType->castAs<VectorType>(); | |||
16105 | if (VTy->getVectorKind() != VectorType::GenericVector) | |||
16106 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16107 | << resultType << Input.get()->getSourceRange()); | |||
16108 | ||||
16109 | // Vector logical not returns the signed variant of the operand type. | |||
16110 | resultType = GetSignedVectorType(resultType); | |||
16111 | break; | |||
16112 | } else { | |||
16113 | return ExprError(Diag(OpLoc, diag::err_typecheck_unary_expr) | |||
16114 | << resultType << Input.get()->getSourceRange()); | |||
16115 | } | |||
16116 | ||||
16117 | // LNot always has type int. C99 6.5.3.3p5. | |||
16118 | // In C++, it's bool. C++ 5.3.1p8 | |||
16119 | resultType = Context.getLogicalOperationType(); | |||
16120 | break; | |||
16121 | case UO_Real: | |||
16122 | case UO_Imag: | |||
16123 | resultType = CheckRealImagOperand(*this, Input, OpLoc, Opc == UO_Real); | |||
16124 | // _Real maps ordinary l-values into ordinary l-values. _Imag maps ordinary | |||
16125 | // complex l-values to ordinary l-values and all other values to r-values. | |||
16126 | if (Input.isInvalid()) return ExprError(); | |||
16127 | if (Opc == UO_Real || Input.get()->getType()->isAnyComplexType()) { | |||
16128 | if (Input.get()->isGLValue() && | |||
16129 | Input.get()->getObjectKind() == OK_Ordinary) | |||
16130 | VK = Input.get()->getValueKind(); | |||
16131 | } else if (!getLangOpts().CPlusPlus) { | |||
16132 | // In C, a volatile scalar is read by __imag. In C++, it is not. | |||
16133 | Input = DefaultLvalueConversion(Input.get()); | |||
16134 | } | |||
16135 | break; | |||
16136 | case UO_Extension: | |||
16137 | resultType = Input.get()->getType(); | |||
16138 | VK = Input.get()->getValueKind(); | |||
16139 | OK = Input.get()->getObjectKind(); | |||
16140 | break; | |||
16141 | case UO_Coawait: | |||
16142 | // It's unnecessary to represent the pass-through operator co_await in the | |||
16143 | // AST; just return the input expression instead. | |||
16144 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 16146, __extension__ __PRETTY_FUNCTION__ )) | |||
16145 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 16146, __extension__ __PRETTY_FUNCTION__ )) | |||
16146 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 16146, __extension__ __PRETTY_FUNCTION__ )); | |||
16147 | return Input; | |||
16148 | } | |||
16149 | if (resultType.isNull() || Input.isInvalid()) | |||
16150 | return ExprError(); | |||
16151 | ||||
16152 | // Check for array bounds violations in the operand of the UnaryOperator, | |||
16153 | // except for the '*' and '&' operators that have to be handled specially | |||
16154 | // by CheckArrayAccess (as there are special cases like &array[arraysize] | |||
16155 | // that are explicitly defined as valid by the standard). | |||
16156 | if (Opc != UO_AddrOf && Opc != UO_Deref) | |||
16157 | CheckArrayAccess(Input.get()); | |||
16158 | ||||
16159 | auto *UO = | |||
16160 | UnaryOperator::Create(Context, Input.get(), Opc, resultType, VK, OK, | |||
16161 | OpLoc, CanOverflow, CurFPFeatureOverrides()); | |||
16162 | ||||
16163 | if (Opc == UO_Deref && UO->getType()->hasAttr(attr::NoDeref) && | |||
16164 | !isa<ArrayType>(UO->getType().getDesugaredType(Context)) && | |||
16165 | !isUnevaluatedContext()) | |||
16166 | ExprEvalContexts.back().PossibleDerefs.insert(UO); | |||
16167 | ||||
16168 | // Convert the result back to a half vector. | |||
16169 | if (ConvertHalfVec) | |||
16170 | return convertVector(UO, Context.HalfTy, *this); | |||
16171 | return UO; | |||
16172 | } | |||
16173 | ||||
16174 | /// Determine whether the given expression is a qualified member | |||
16175 | /// access expression, of a form that could be turned into a pointer to member | |||
16176 | /// with the address-of operator. | |||
16177 | bool Sema::isQualifiedMemberAccess(Expr *E) { | |||
16178 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
16179 | if (!DRE->getQualifier()) | |||
16180 | return false; | |||
16181 | ||||
16182 | ValueDecl *VD = DRE->getDecl(); | |||
16183 | if (!VD->isCXXClassMember()) | |||
16184 | return false; | |||
16185 | ||||
16186 | if (isa<FieldDecl>(VD) || isa<IndirectFieldDecl>(VD)) | |||
16187 | return true; | |||
16188 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(VD)) | |||
16189 | return Method->isInstance(); | |||
16190 | ||||
16191 | return false; | |||
16192 | } | |||
16193 | ||||
16194 | if (UnresolvedLookupExpr *ULE = dyn_cast<UnresolvedLookupExpr>(E)) { | |||
16195 | if (!ULE->getQualifier()) | |||
16196 | return false; | |||
16197 | ||||
16198 | for (NamedDecl *D : ULE->decls()) { | |||
16199 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
16200 | if (Method->isInstance()) | |||
16201 | return true; | |||
16202 | } else { | |||
16203 | // Overload set does not contain methods. | |||
16204 | break; | |||
16205 | } | |||
16206 | } | |||
16207 | ||||
16208 | return false; | |||
16209 | } | |||
16210 | ||||
16211 | return false; | |||
16212 | } | |||
16213 | ||||
16214 | ExprResult Sema::BuildUnaryOp(Scope *S, SourceLocation OpLoc, | |||
16215 | UnaryOperatorKind Opc, Expr *Input, | |||
16216 | bool IsAfterAmp) { | |||
16217 | // First things first: handle placeholders so that the | |||
16218 | // overloaded-operator check considers the right type. | |||
16219 | if (const BuiltinType *pty = Input->getType()->getAsPlaceholderType()) { | |||
16220 | // Increment and decrement of pseudo-object references. | |||
16221 | if (pty->getKind() == BuiltinType::PseudoObject && | |||
16222 | UnaryOperator::isIncrementDecrementOp(Opc)) | |||
16223 | return checkPseudoObjectIncDec(S, OpLoc, Opc, Input); | |||
16224 | ||||
16225 | // extension is always a builtin operator. | |||
16226 | if (Opc == UO_Extension) | |||
16227 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input); | |||
16228 | ||||
16229 | // & gets special logic for several kinds of placeholder. | |||
16230 | // The builtin code knows what to do. | |||
16231 | if (Opc == UO_AddrOf && | |||
16232 | (pty->getKind() == BuiltinType::Overload || | |||
16233 | pty->getKind() == BuiltinType::UnknownAny || | |||
16234 | pty->getKind() == BuiltinType::BoundMember)) | |||
16235 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input); | |||
16236 | ||||
16237 | // Anything else needs to be handled now. | |||
16238 | ExprResult Result = CheckPlaceholderExpr(Input); | |||
16239 | if (Result.isInvalid()) return ExprError(); | |||
16240 | Input = Result.get(); | |||
16241 | } | |||
16242 | ||||
16243 | if (getLangOpts().CPlusPlus && Input->getType()->isOverloadableType() && | |||
16244 | UnaryOperator::getOverloadedOperator(Opc) != OO_None && | |||
16245 | !(Opc == UO_AddrOf && isQualifiedMemberAccess(Input))) { | |||
16246 | // Find all of the overloaded operators visible from this point. | |||
16247 | UnresolvedSet<16> Functions; | |||
16248 | OverloadedOperatorKind OverOp = UnaryOperator::getOverloadedOperator(Opc); | |||
16249 | if (S && OverOp != OO_None) | |||
16250 | LookupOverloadedOperatorName(OverOp, S, Functions); | |||
16251 | ||||
16252 | return CreateOverloadedUnaryOp(OpLoc, Opc, Functions, Input); | |||
16253 | } | |||
16254 | ||||
16255 | return CreateBuiltinUnaryOp(OpLoc, Opc, Input, IsAfterAmp); | |||
16256 | } | |||
16257 | ||||
16258 | // Unary Operators. 'Tok' is the token for the operator. | |||
16259 | ExprResult Sema::ActOnUnaryOp(Scope *S, SourceLocation OpLoc, tok::TokenKind Op, | |||
16260 | Expr *Input, bool IsAfterAmp) { | |||
16261 | return BuildUnaryOp(S, OpLoc, ConvertTokenKindToUnaryOpcode(Op), Input, | |||
16262 | IsAfterAmp); | |||
16263 | } | |||
16264 | ||||
16265 | /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". | |||
16266 | ExprResult Sema::ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, | |||
16267 | LabelDecl *TheDecl) { | |||
16268 | TheDecl->markUsed(Context); | |||
16269 | // Create the AST node. The address of a label always has type 'void*'. | |||
16270 | auto *Res = new (Context) AddrLabelExpr( | |||
16271 | OpLoc, LabLoc, TheDecl, Context.getPointerType(Context.VoidTy)); | |||
16272 | ||||
16273 | if (getCurFunction()) | |||
16274 | getCurFunction()->AddrLabels.push_back(Res); | |||
16275 | ||||
16276 | return Res; | |||
16277 | } | |||
16278 | ||||
16279 | void Sema::ActOnStartStmtExpr() { | |||
16280 | PushExpressionEvaluationContext(ExprEvalContexts.back().Context); | |||
16281 | } | |||
16282 | ||||
16283 | void Sema::ActOnStmtExprError() { | |||
16284 | // Note that function is also called by TreeTransform when leaving a | |||
16285 | // StmtExpr scope without rebuilding anything. | |||
16286 | ||||
16287 | DiscardCleanupsInEvaluationContext(); | |||
16288 | PopExpressionEvaluationContext(); | |||
16289 | } | |||
16290 | ||||
16291 | ExprResult Sema::ActOnStmtExpr(Scope *S, SourceLocation LPLoc, Stmt *SubStmt, | |||
16292 | SourceLocation RPLoc) { | |||
16293 | return BuildStmtExpr(LPLoc, SubStmt, RPLoc, getTemplateDepth(S)); | |||
16294 | } | |||
16295 | ||||
16296 | ExprResult Sema::BuildStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, | |||
16297 | SourceLocation RPLoc, unsigned TemplateDepth) { | |||
16298 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16298, __extension__ __PRETTY_FUNCTION__ )); | |||
16299 | CompoundStmt *Compound = cast<CompoundStmt>(SubStmt); | |||
16300 | ||||
16301 | if (hasAnyUnrecoverableErrorsInThisFunction()) | |||
16302 | DiscardCleanupsInEvaluationContext(); | |||
16303 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16304, __extension__ __PRETTY_FUNCTION__ )) | |||
16304 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16304, __extension__ __PRETTY_FUNCTION__ )); | |||
16305 | PopExpressionEvaluationContext(); | |||
16306 | ||||
16307 | // FIXME: there are a variety of strange constraints to enforce here, for | |||
16308 | // example, it is not possible to goto into a stmt expression apparently. | |||
16309 | // More semantic analysis is needed. | |||
16310 | ||||
16311 | // If there are sub-stmts in the compound stmt, take the type of the last one | |||
16312 | // as the type of the stmtexpr. | |||
16313 | QualType Ty = Context.VoidTy; | |||
16314 | bool StmtExprMayBindToTemp = false; | |||
16315 | if (!Compound->body_empty()) { | |||
16316 | // For GCC compatibility we get the last Stmt excluding trailing NullStmts. | |||
16317 | if (const auto *LastStmt = | |||
16318 | dyn_cast<ValueStmt>(Compound->getStmtExprResult())) { | |||
16319 | if (const Expr *Value = LastStmt->getExprStmt()) { | |||
16320 | StmtExprMayBindToTemp = true; | |||
16321 | Ty = Value->getType(); | |||
16322 | } | |||
16323 | } | |||
16324 | } | |||
16325 | ||||
16326 | // FIXME: Check that expression type is complete/non-abstract; statement | |||
16327 | // expressions are not lvalues. | |||
16328 | Expr *ResStmtExpr = | |||
16329 | new (Context) StmtExpr(Compound, Ty, LPLoc, RPLoc, TemplateDepth); | |||
16330 | if (StmtExprMayBindToTemp) | |||
16331 | return MaybeBindToTemporary(ResStmtExpr); | |||
16332 | return ResStmtExpr; | |||
16333 | } | |||
16334 | ||||
16335 | ExprResult Sema::ActOnStmtExprResult(ExprResult ER) { | |||
16336 | if (ER.isInvalid()) | |||
16337 | return ExprError(); | |||
16338 | ||||
16339 | // Do function/array conversion on the last expression, but not | |||
16340 | // lvalue-to-rvalue. However, initialize an unqualified type. | |||
16341 | ER = DefaultFunctionArrayConversion(ER.get()); | |||
16342 | if (ER.isInvalid()) | |||
16343 | return ExprError(); | |||
16344 | Expr *E = ER.get(); | |||
16345 | ||||
16346 | if (E->isTypeDependent()) | |||
16347 | return E; | |||
16348 | ||||
16349 | // In ARC, if the final expression ends in a consume, splice | |||
16350 | // the consume out and bind it later. In the alternate case | |||
16351 | // (when dealing with a retainable type), the result | |||
16352 | // initialization will create a produce. In both cases the | |||
16353 | // result will be +1, and we'll need to balance that out with | |||
16354 | // a bind. | |||
16355 | auto *Cast = dyn_cast<ImplicitCastExpr>(E); | |||
16356 | if (Cast && Cast->getCastKind() == CK_ARCConsumeObject) | |||
16357 | return Cast->getSubExpr(); | |||
16358 | ||||
16359 | // FIXME: Provide a better location for the initialization. | |||
16360 | return PerformCopyInitialization( | |||
16361 | InitializedEntity::InitializeStmtExprResult( | |||
16362 | E->getBeginLoc(), E->getType().getUnqualifiedType()), | |||
16363 | SourceLocation(), E); | |||
16364 | } | |||
16365 | ||||
16366 | ExprResult Sema::BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, | |||
16367 | TypeSourceInfo *TInfo, | |||
16368 | ArrayRef<OffsetOfComponent> Components, | |||
16369 | SourceLocation RParenLoc) { | |||
16370 | QualType ArgTy = TInfo->getType(); | |||
16371 | bool Dependent = ArgTy->isDependentType(); | |||
16372 | SourceRange TypeRange = TInfo->getTypeLoc().getLocalSourceRange(); | |||
16373 | ||||
16374 | // We must have at least one component that refers to the type, and the first | |||
16375 | // one is known to be a field designator. Verify that the ArgTy represents | |||
16376 | // a struct/union/class. | |||
16377 | if (!Dependent && !ArgTy->isRecordType()) | |||
16378 | return ExprError(Diag(BuiltinLoc, diag::err_offsetof_record_type) | |||
16379 | << ArgTy << TypeRange); | |||
16380 | ||||
16381 | // Type must be complete per C99 7.17p3 because a declaring a variable | |||
16382 | // with an incomplete type would be ill-formed. | |||
16383 | if (!Dependent | |||
16384 | && RequireCompleteType(BuiltinLoc, ArgTy, | |||
16385 | diag::err_offsetof_incomplete_type, TypeRange)) | |||
16386 | return ExprError(); | |||
16387 | ||||
16388 | bool DidWarnAboutNonPOD = false; | |||
16389 | QualType CurrentType = ArgTy; | |||
16390 | SmallVector<OffsetOfNode, 4> Comps; | |||
16391 | SmallVector<Expr*, 4> Exprs; | |||
16392 | for (const OffsetOfComponent &OC : Components) { | |||
16393 | if (OC.isBrackets) { | |||
16394 | // Offset of an array sub-field. TODO: Should we allow vector elements? | |||
16395 | if (!CurrentType->isDependentType()) { | |||
16396 | const ArrayType *AT = Context.getAsArrayType(CurrentType); | |||
16397 | if(!AT) | |||
16398 | return ExprError(Diag(OC.LocEnd, diag::err_offsetof_array_type) | |||
16399 | << CurrentType); | |||
16400 | CurrentType = AT->getElementType(); | |||
16401 | } else | |||
16402 | CurrentType = Context.DependentTy; | |||
16403 | ||||
16404 | ExprResult IdxRval = DefaultLvalueConversion(static_cast<Expr*>(OC.U.E)); | |||
16405 | if (IdxRval.isInvalid()) | |||
16406 | return ExprError(); | |||
16407 | Expr *Idx = IdxRval.get(); | |||
16408 | ||||
16409 | // The expression must be an integral expression. | |||
16410 | // FIXME: An integral constant expression? | |||
16411 | if (!Idx->isTypeDependent() && !Idx->isValueDependent() && | |||
16412 | !Idx->getType()->isIntegerType()) | |||
16413 | return ExprError( | |||
16414 | Diag(Idx->getBeginLoc(), diag::err_typecheck_subscript_not_integer) | |||
16415 | << Idx->getSourceRange()); | |||
16416 | ||||
16417 | // Record this array index. | |||
16418 | Comps.push_back(OffsetOfNode(OC.LocStart, Exprs.size(), OC.LocEnd)); | |||
16419 | Exprs.push_back(Idx); | |||
16420 | continue; | |||
16421 | } | |||
16422 | ||||
16423 | // Offset of a field. | |||
16424 | if (CurrentType->isDependentType()) { | |||
16425 | // We have the offset of a field, but we can't look into the dependent | |||
16426 | // type. Just record the identifier of the field. | |||
16427 | Comps.push_back(OffsetOfNode(OC.LocStart, OC.U.IdentInfo, OC.LocEnd)); | |||
16428 | CurrentType = Context.DependentTy; | |||
16429 | continue; | |||
16430 | } | |||
16431 | ||||
16432 | // We need to have a complete type to look into. | |||
16433 | if (RequireCompleteType(OC.LocStart, CurrentType, | |||
16434 | diag::err_offsetof_incomplete_type)) | |||
16435 | return ExprError(); | |||
16436 | ||||
16437 | // Look for the designated field. | |||
16438 | const RecordType *RC = CurrentType->getAs<RecordType>(); | |||
16439 | if (!RC) | |||
16440 | return ExprError(Diag(OC.LocEnd, diag::err_offsetof_record_type) | |||
16441 | << CurrentType); | |||
16442 | RecordDecl *RD = RC->getDecl(); | |||
16443 | ||||
16444 | // C++ [lib.support.types]p5: | |||
16445 | // The macro offsetof accepts a restricted set of type arguments in this | |||
16446 | // International Standard. type shall be a POD structure or a POD union | |||
16447 | // (clause 9). | |||
16448 | // C++11 [support.types]p4: | |||
16449 | // If type is not a standard-layout class (Clause 9), the results are | |||
16450 | // undefined. | |||
16451 | if (CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { | |||
16452 | bool IsSafe = LangOpts.CPlusPlus11? CRD->isStandardLayout() : CRD->isPOD(); | |||
16453 | unsigned DiagID = | |||
16454 | LangOpts.CPlusPlus11? diag::ext_offsetof_non_standardlayout_type | |||
16455 | : diag::ext_offsetof_non_pod_type; | |||
16456 | ||||
16457 | if (!IsSafe && !DidWarnAboutNonPOD && | |||
16458 | DiagRuntimeBehavior(BuiltinLoc, nullptr, | |||
16459 | PDiag(DiagID) | |||
16460 | << SourceRange(Components[0].LocStart, OC.LocEnd) | |||
16461 | << CurrentType)) | |||
16462 | DidWarnAboutNonPOD = true; | |||
16463 | } | |||
16464 | ||||
16465 | // Look for the field. | |||
16466 | LookupResult R(*this, OC.U.IdentInfo, OC.LocStart, LookupMemberName); | |||
16467 | LookupQualifiedName(R, RD); | |||
16468 | FieldDecl *MemberDecl = R.getAsSingle<FieldDecl>(); | |||
16469 | IndirectFieldDecl *IndirectMemberDecl = nullptr; | |||
16470 | if (!MemberDecl) { | |||
16471 | if ((IndirectMemberDecl = R.getAsSingle<IndirectFieldDecl>())) | |||
16472 | MemberDecl = IndirectMemberDecl->getAnonField(); | |||
16473 | } | |||
16474 | ||||
16475 | if (!MemberDecl) | |||
16476 | return ExprError(Diag(BuiltinLoc, diag::err_no_member) | |||
16477 | << OC.U.IdentInfo << RD << SourceRange(OC.LocStart, | |||
16478 | OC.LocEnd)); | |||
16479 | ||||
16480 | // C99 7.17p3: | |||
16481 | // (If the specified member is a bit-field, the behavior is undefined.) | |||
16482 | // | |||
16483 | // We diagnose this as an error. | |||
16484 | if (MemberDecl->isBitField()) { | |||
16485 | Diag(OC.LocEnd, diag::err_offsetof_bitfield) | |||
16486 | << MemberDecl->getDeclName() | |||
16487 | << SourceRange(BuiltinLoc, RParenLoc); | |||
16488 | Diag(MemberDecl->getLocation(), diag::note_bitfield_decl); | |||
16489 | return ExprError(); | |||
16490 | } | |||
16491 | ||||
16492 | RecordDecl *Parent = MemberDecl->getParent(); | |||
16493 | if (IndirectMemberDecl) | |||
16494 | Parent = cast<RecordDecl>(IndirectMemberDecl->getDeclContext()); | |||
16495 | ||||
16496 | // If the member was found in a base class, introduce OffsetOfNodes for | |||
16497 | // the base class indirections. | |||
16498 | CXXBasePaths Paths; | |||
16499 | if (IsDerivedFrom(OC.LocStart, CurrentType, Context.getTypeDeclType(Parent), | |||
16500 | Paths)) { | |||
16501 | if (Paths.getDetectedVirtual()) { | |||
16502 | Diag(OC.LocEnd, diag::err_offsetof_field_of_virtual_base) | |||
16503 | << MemberDecl->getDeclName() | |||
16504 | << SourceRange(BuiltinLoc, RParenLoc); | |||
16505 | return ExprError(); | |||
16506 | } | |||
16507 | ||||
16508 | CXXBasePath &Path = Paths.front(); | |||
16509 | for (const CXXBasePathElement &B : Path) | |||
16510 | Comps.push_back(OffsetOfNode(B.Base)); | |||
16511 | } | |||
16512 | ||||
16513 | if (IndirectMemberDecl) { | |||
16514 | for (auto *FI : IndirectMemberDecl->chain()) { | |||
16515 | assert(isa<FieldDecl>(FI))(static_cast <bool> (isa<FieldDecl>(FI)) ? void ( 0) : __assert_fail ("isa<FieldDecl>(FI)", "clang/lib/Sema/SemaExpr.cpp" , 16515, __extension__ __PRETTY_FUNCTION__)); | |||
16516 | Comps.push_back(OffsetOfNode(OC.LocStart, | |||
16517 | cast<FieldDecl>(FI), OC.LocEnd)); | |||
16518 | } | |||
16519 | } else | |||
16520 | Comps.push_back(OffsetOfNode(OC.LocStart, MemberDecl, OC.LocEnd)); | |||
16521 | ||||
16522 | CurrentType = MemberDecl->getType().getNonReferenceType(); | |||
16523 | } | |||
16524 | ||||
16525 | return OffsetOfExpr::Create(Context, Context.getSizeType(), BuiltinLoc, TInfo, | |||
16526 | Comps, Exprs, RParenLoc); | |||
16527 | } | |||
16528 | ||||
16529 | ExprResult Sema::ActOnBuiltinOffsetOf(Scope *S, | |||
16530 | SourceLocation BuiltinLoc, | |||
16531 | SourceLocation TypeLoc, | |||
16532 | ParsedType ParsedArgTy, | |||
16533 | ArrayRef<OffsetOfComponent> Components, | |||
16534 | SourceLocation RParenLoc) { | |||
16535 | ||||
16536 | TypeSourceInfo *ArgTInfo; | |||
16537 | QualType ArgTy = GetTypeFromParser(ParsedArgTy, &ArgTInfo); | |||
16538 | if (ArgTy.isNull()) | |||
16539 | return ExprError(); | |||
16540 | ||||
16541 | if (!ArgTInfo) | |||
16542 | ArgTInfo = Context.getTrivialTypeSourceInfo(ArgTy, TypeLoc); | |||
16543 | ||||
16544 | return BuildBuiltinOffsetOf(BuiltinLoc, ArgTInfo, Components, RParenLoc); | |||
16545 | } | |||
16546 | ||||
16547 | ||||
16548 | ExprResult Sema::ActOnChooseExpr(SourceLocation BuiltinLoc, | |||
16549 | Expr *CondExpr, | |||
16550 | Expr *LHSExpr, Expr *RHSExpr, | |||
16551 | SourceLocation RPLoc) { | |||
16552 | 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)\"" , "clang/lib/Sema/SemaExpr.cpp", 16552, __extension__ __PRETTY_FUNCTION__ )); | |||
16553 | ||||
16554 | ExprValueKind VK = VK_PRValue; | |||
16555 | ExprObjectKind OK = OK_Ordinary; | |||
16556 | QualType resType; | |||
16557 | bool CondIsTrue = false; | |||
16558 | if (CondExpr->isTypeDependent() || CondExpr->isValueDependent()) { | |||
16559 | resType = Context.DependentTy; | |||
16560 | } else { | |||
16561 | // The conditional expression is required to be a constant expression. | |||
16562 | llvm::APSInt condEval(32); | |||
16563 | ExprResult CondICE = VerifyIntegerConstantExpression( | |||
16564 | CondExpr, &condEval, diag::err_typecheck_choose_expr_requires_constant); | |||
16565 | if (CondICE.isInvalid()) | |||
16566 | return ExprError(); | |||
16567 | CondExpr = CondICE.get(); | |||
16568 | CondIsTrue = condEval.getZExtValue(); | |||
16569 | ||||
16570 | // If the condition is > zero, then the AST type is the same as the LHSExpr. | |||
16571 | Expr *ActiveExpr = CondIsTrue ? LHSExpr : RHSExpr; | |||
16572 | ||||
16573 | resType = ActiveExpr->getType(); | |||
16574 | VK = ActiveExpr->getValueKind(); | |||
16575 | OK = ActiveExpr->getObjectKind(); | |||
16576 | } | |||
16577 | ||||
16578 | return new (Context) ChooseExpr(BuiltinLoc, CondExpr, LHSExpr, RHSExpr, | |||
16579 | resType, VK, OK, RPLoc, CondIsTrue); | |||
16580 | } | |||
16581 | ||||
16582 | //===----------------------------------------------------------------------===// | |||
16583 | // Clang Extensions. | |||
16584 | //===----------------------------------------------------------------------===// | |||
16585 | ||||
16586 | /// ActOnBlockStart - This callback is invoked when a block literal is started. | |||
16587 | void Sema::ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope) { | |||
16588 | BlockDecl *Block = BlockDecl::Create(Context, CurContext, CaretLoc); | |||
16589 | ||||
16590 | if (LangOpts.CPlusPlus) { | |||
16591 | MangleNumberingContext *MCtx; | |||
16592 | Decl *ManglingContextDecl; | |||
16593 | std::tie(MCtx, ManglingContextDecl) = | |||
16594 | getCurrentMangleNumberContext(Block->getDeclContext()); | |||
16595 | if (MCtx) { | |||
16596 | unsigned ManglingNumber = MCtx->getManglingNumber(Block); | |||
16597 | Block->setBlockMangling(ManglingNumber, ManglingContextDecl); | |||
16598 | } | |||
16599 | } | |||
16600 | ||||
16601 | PushBlockScope(CurScope, Block); | |||
16602 | CurContext->addDecl(Block); | |||
16603 | if (CurScope) | |||
16604 | PushDeclContext(CurScope, Block); | |||
16605 | else | |||
16606 | CurContext = Block; | |||
16607 | ||||
16608 | getCurBlock()->HasImplicitReturnType = true; | |||
16609 | ||||
16610 | // Enter a new evaluation context to insulate the block from any | |||
16611 | // cleanups from the enclosing full-expression. | |||
16612 | PushExpressionEvaluationContext( | |||
16613 | ExpressionEvaluationContext::PotentiallyEvaluated); | |||
16614 | } | |||
16615 | ||||
16616 | void Sema::ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo, | |||
16617 | Scope *CurScope) { | |||
16618 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16619, __extension__ __PRETTY_FUNCTION__ )) | |||
16619 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16619, __extension__ __PRETTY_FUNCTION__ )); | |||
16620 | assert(ParamInfo.getContext() == DeclaratorContext::BlockLiteral)(static_cast <bool> (ParamInfo.getContext() == DeclaratorContext ::BlockLiteral) ? void (0) : __assert_fail ("ParamInfo.getContext() == DeclaratorContext::BlockLiteral" , "clang/lib/Sema/SemaExpr.cpp", 16620, __extension__ __PRETTY_FUNCTION__ )); | |||
16621 | BlockScopeInfo *CurBlock = getCurBlock(); | |||
16622 | ||||
16623 | TypeSourceInfo *Sig = GetTypeForDeclarator(ParamInfo, CurScope); | |||
16624 | QualType T = Sig->getType(); | |||
16625 | ||||
16626 | // FIXME: We should allow unexpanded parameter packs here, but that would, | |||
16627 | // in turn, make the block expression contain unexpanded parameter packs. | |||
16628 | if (DiagnoseUnexpandedParameterPack(CaretLoc, Sig, UPPC_Block)) { | |||
16629 | // Drop the parameters. | |||
16630 | FunctionProtoType::ExtProtoInfo EPI; | |||
16631 | EPI.HasTrailingReturn = false; | |||
16632 | EPI.TypeQuals.addConst(); | |||
16633 | T = Context.getFunctionType(Context.DependentTy, std::nullopt, EPI); | |||
16634 | Sig = Context.getTrivialTypeSourceInfo(T); | |||
16635 | } | |||
16636 | ||||
16637 | // GetTypeForDeclarator always produces a function type for a block | |||
16638 | // literal signature. Furthermore, it is always a FunctionProtoType | |||
16639 | // unless the function was written with a typedef. | |||
16640 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 16641, __extension__ __PRETTY_FUNCTION__ )) | |||
16641 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 16641, __extension__ __PRETTY_FUNCTION__ )); | |||
16642 | ||||
16643 | // Look for an explicit signature in that function type. | |||
16644 | FunctionProtoTypeLoc ExplicitSignature; | |||
16645 | ||||
16646 | if ((ExplicitSignature = Sig->getTypeLoc() | |||
16647 | .getAsAdjusted<FunctionProtoTypeLoc>())) { | |||
16648 | ||||
16649 | // Check whether that explicit signature was synthesized by | |||
16650 | // GetTypeForDeclarator. If so, don't save that as part of the | |||
16651 | // written signature. | |||
16652 | if (ExplicitSignature.getLocalRangeBegin() == | |||
16653 | ExplicitSignature.getLocalRangeEnd()) { | |||
16654 | // This would be much cheaper if we stored TypeLocs instead of | |||
16655 | // TypeSourceInfos. | |||
16656 | TypeLoc Result = ExplicitSignature.getReturnLoc(); | |||
16657 | unsigned Size = Result.getFullDataSize(); | |||
16658 | Sig = Context.CreateTypeSourceInfo(Result.getType(), Size); | |||
16659 | Sig->getTypeLoc().initializeFullCopy(Result, Size); | |||
16660 | ||||
16661 | ExplicitSignature = FunctionProtoTypeLoc(); | |||
16662 | } | |||
16663 | } | |||
16664 | ||||
16665 | CurBlock->TheDecl->setSignatureAsWritten(Sig); | |||
16666 | CurBlock->FunctionType = T; | |||
16667 | ||||
16668 | const auto *Fn = T->castAs<FunctionType>(); | |||
16669 | QualType RetTy = Fn->getReturnType(); | |||
16670 | bool isVariadic = | |||
16671 | (isa<FunctionProtoType>(Fn) && cast<FunctionProtoType>(Fn)->isVariadic()); | |||
16672 | ||||
16673 | CurBlock->TheDecl->setIsVariadic(isVariadic); | |||
16674 | ||||
16675 | // Context.DependentTy is used as a placeholder for a missing block | |||
16676 | // return type. TODO: what should we do with declarators like: | |||
16677 | // ^ * { ... } | |||
16678 | // If the answer is "apply template argument deduction".... | |||
16679 | if (RetTy != Context.DependentTy) { | |||
16680 | CurBlock->ReturnType = RetTy; | |||
16681 | CurBlock->TheDecl->setBlockMissingReturnType(false); | |||
16682 | CurBlock->HasImplicitReturnType = false; | |||
16683 | } | |||
16684 | ||||
16685 | // Push block parameters from the declarator if we had them. | |||
16686 | SmallVector<ParmVarDecl*, 8> Params; | |||
16687 | if (ExplicitSignature) { | |||
16688 | for (unsigned I = 0, E = ExplicitSignature.getNumParams(); I != E; ++I) { | |||
16689 | ParmVarDecl *Param = ExplicitSignature.getParam(I); | |||
16690 | if (Param->getIdentifier() == nullptr && !Param->isImplicit() && | |||
16691 | !Param->isInvalidDecl() && !getLangOpts().CPlusPlus) { | |||
16692 | // Diagnose this as an extension in C17 and earlier. | |||
16693 | if (!getLangOpts().C2x) | |||
16694 | Diag(Param->getLocation(), diag::ext_parameter_name_omitted_c2x); | |||
16695 | } | |||
16696 | Params.push_back(Param); | |||
16697 | } | |||
16698 | ||||
16699 | // Fake up parameter variables if we have a typedef, like | |||
16700 | // ^ fntype { ... } | |||
16701 | } else if (const FunctionProtoType *Fn = T->getAs<FunctionProtoType>()) { | |||
16702 | for (const auto &I : Fn->param_types()) { | |||
16703 | ParmVarDecl *Param = BuildParmVarDeclForTypedef( | |||
16704 | CurBlock->TheDecl, ParamInfo.getBeginLoc(), I); | |||
16705 | Params.push_back(Param); | |||
16706 | } | |||
16707 | } | |||
16708 | ||||
16709 | // Set the parameters on the block decl. | |||
16710 | if (!Params.empty()) { | |||
16711 | CurBlock->TheDecl->setParams(Params); | |||
16712 | CheckParmsForFunctionDef(CurBlock->TheDecl->parameters(), | |||
16713 | /*CheckParameterNames=*/false); | |||
16714 | } | |||
16715 | ||||
16716 | // Finally we can process decl attributes. | |||
16717 | ProcessDeclAttributes(CurScope, CurBlock->TheDecl, ParamInfo); | |||
16718 | ||||
16719 | // Put the parameter variables in scope. | |||
16720 | for (auto *AI : CurBlock->TheDecl->parameters()) { | |||
16721 | AI->setOwningFunction(CurBlock->TheDecl); | |||
16722 | ||||
16723 | // If this has an identifier, add it to the scope stack. | |||
16724 | if (AI->getIdentifier()) { | |||
16725 | CheckShadow(CurBlock->TheScope, AI); | |||
16726 | ||||
16727 | PushOnScopeChains(AI, CurBlock->TheScope); | |||
16728 | } | |||
16729 | } | |||
16730 | } | |||
16731 | ||||
16732 | /// ActOnBlockError - If there is an error parsing a block, this callback | |||
16733 | /// is invoked to pop the information about the block from the action impl. | |||
16734 | void Sema::ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope) { | |||
16735 | // Leave the expression-evaluation context. | |||
16736 | DiscardCleanupsInEvaluationContext(); | |||
16737 | PopExpressionEvaluationContext(); | |||
16738 | ||||
16739 | // Pop off CurBlock, handle nested blocks. | |||
16740 | PopDeclContext(); | |||
16741 | PopFunctionScopeInfo(); | |||
16742 | } | |||
16743 | ||||
16744 | /// ActOnBlockStmtExpr - This is called when the body of a block statement | |||
16745 | /// literal was successfully completed. ^(int x){...} | |||
16746 | ExprResult Sema::ActOnBlockStmtExpr(SourceLocation CaretLoc, | |||
16747 | Stmt *Body, Scope *CurScope) { | |||
16748 | // If blocks are disabled, emit an error. | |||
16749 | if (!LangOpts.Blocks) | |||
16750 | Diag(CaretLoc, diag::err_blocks_disable) << LangOpts.OpenCL; | |||
16751 | ||||
16752 | // Leave the expression-evaluation context. | |||
16753 | if (hasAnyUnrecoverableErrorsInThisFunction()) | |||
16754 | DiscardCleanupsInEvaluationContext(); | |||
16755 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16756, __extension__ __PRETTY_FUNCTION__ )) | |||
16756 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 16756, __extension__ __PRETTY_FUNCTION__ )); | |||
16757 | PopExpressionEvaluationContext(); | |||
16758 | ||||
16759 | BlockScopeInfo *BSI = cast<BlockScopeInfo>(FunctionScopes.back()); | |||
16760 | BlockDecl *BD = BSI->TheDecl; | |||
16761 | ||||
16762 | if (BSI->HasImplicitReturnType) | |||
16763 | deduceClosureReturnType(*BSI); | |||
16764 | ||||
16765 | QualType RetTy = Context.VoidTy; | |||
16766 | if (!BSI->ReturnType.isNull()) | |||
16767 | RetTy = BSI->ReturnType; | |||
16768 | ||||
16769 | bool NoReturn = BD->hasAttr<NoReturnAttr>(); | |||
16770 | QualType BlockTy; | |||
16771 | ||||
16772 | // If the user wrote a function type in some form, try to use that. | |||
16773 | if (!BSI->FunctionType.isNull()) { | |||
16774 | const FunctionType *FTy = BSI->FunctionType->castAs<FunctionType>(); | |||
16775 | ||||
16776 | FunctionType::ExtInfo Ext = FTy->getExtInfo(); | |||
16777 | if (NoReturn && !Ext.getNoReturn()) Ext = Ext.withNoReturn(true); | |||
16778 | ||||
16779 | // Turn protoless block types into nullary block types. | |||
16780 | if (isa<FunctionNoProtoType>(FTy)) { | |||
16781 | FunctionProtoType::ExtProtoInfo EPI; | |||
16782 | EPI.ExtInfo = Ext; | |||
16783 | BlockTy = Context.getFunctionType(RetTy, std::nullopt, EPI); | |||
16784 | ||||
16785 | // Otherwise, if we don't need to change anything about the function type, | |||
16786 | // preserve its sugar structure. | |||
16787 | } else if (FTy->getReturnType() == RetTy && | |||
16788 | (!NoReturn || FTy->getNoReturnAttr())) { | |||
16789 | BlockTy = BSI->FunctionType; | |||
16790 | ||||
16791 | // Otherwise, make the minimal modifications to the function type. | |||
16792 | } else { | |||
16793 | const FunctionProtoType *FPT = cast<FunctionProtoType>(FTy); | |||
16794 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | |||
16795 | EPI.TypeQuals = Qualifiers(); | |||
16796 | EPI.ExtInfo = Ext; | |||
16797 | BlockTy = Context.getFunctionType(RetTy, FPT->getParamTypes(), EPI); | |||
16798 | } | |||
16799 | ||||
16800 | // If we don't have a function type, just build one from nothing. | |||
16801 | } else { | |||
16802 | FunctionProtoType::ExtProtoInfo EPI; | |||
16803 | EPI.ExtInfo = FunctionType::ExtInfo().withNoReturn(NoReturn); | |||
16804 | BlockTy = Context.getFunctionType(RetTy, std::nullopt, EPI); | |||
16805 | } | |||
16806 | ||||
16807 | DiagnoseUnusedParameters(BD->parameters()); | |||
16808 | BlockTy = Context.getBlockPointerType(BlockTy); | |||
16809 | ||||
16810 | // If needed, diagnose invalid gotos and switches in the block. | |||
16811 | if (getCurFunction()->NeedsScopeChecking() && | |||
16812 | !PP.isCodeCompletionEnabled()) | |||
16813 | DiagnoseInvalidJumps(cast<CompoundStmt>(Body)); | |||
16814 | ||||
16815 | BD->setBody(cast<CompoundStmt>(Body)); | |||
16816 | ||||
16817 | if (Body && getCurFunction()->HasPotentialAvailabilityViolations) | |||
16818 | DiagnoseUnguardedAvailabilityViolations(BD); | |||
16819 | ||||
16820 | // Try to apply the named return value optimization. We have to check again | |||
16821 | // if we can do this, though, because blocks keep return statements around | |||
16822 | // to deduce an implicit return type. | |||
16823 | if (getLangOpts().CPlusPlus && RetTy->isRecordType() && | |||
16824 | !BD->isDependentContext()) | |||
16825 | computeNRVO(Body, BSI); | |||
16826 | ||||
16827 | if (RetTy.hasNonTrivialToPrimitiveDestructCUnion() || | |||
16828 | RetTy.hasNonTrivialToPrimitiveCopyCUnion()) | |||
16829 | checkNonTrivialCUnion(RetTy, BD->getCaretLocation(), NTCUC_FunctionReturn, | |||
16830 | NTCUK_Destruct|NTCUK_Copy); | |||
16831 | ||||
16832 | PopDeclContext(); | |||
16833 | ||||
16834 | // Set the captured variables on the block. | |||
16835 | SmallVector<BlockDecl::Capture, 4> Captures; | |||
16836 | for (Capture &Cap : BSI->Captures) { | |||
16837 | if (Cap.isInvalid() || Cap.isThisCapture()) | |||
16838 | continue; | |||
16839 | // Cap.getVariable() is always a VarDecl because | |||
16840 | // blocks cannot capture structured bindings or other ValueDecl kinds. | |||
16841 | auto *Var = cast<VarDecl>(Cap.getVariable()); | |||
16842 | Expr *CopyExpr = nullptr; | |||
16843 | if (getLangOpts().CPlusPlus && Cap.isCopyCapture()) { | |||
16844 | if (const RecordType *Record = | |||
16845 | Cap.getCaptureType()->getAs<RecordType>()) { | |||
16846 | // The capture logic needs the destructor, so make sure we mark it. | |||
16847 | // Usually this is unnecessary because most local variables have | |||
16848 | // their destructors marked at declaration time, but parameters are | |||
16849 | // an exception because it's technically only the call site that | |||
16850 | // actually requires the destructor. | |||
16851 | if (isa<ParmVarDecl>(Var)) | |||
16852 | FinalizeVarWithDestructor(Var, Record); | |||
16853 | ||||
16854 | // Enter a separate potentially-evaluated context while building block | |||
16855 | // initializers to isolate their cleanups from those of the block | |||
16856 | // itself. | |||
16857 | // FIXME: Is this appropriate even when the block itself occurs in an | |||
16858 | // unevaluated operand? | |||
16859 | EnterExpressionEvaluationContext EvalContext( | |||
16860 | *this, ExpressionEvaluationContext::PotentiallyEvaluated); | |||
16861 | ||||
16862 | SourceLocation Loc = Cap.getLocation(); | |||
16863 | ||||
16864 | ExprResult Result = BuildDeclarationNameExpr( | |||
16865 | CXXScopeSpec(), DeclarationNameInfo(Var->getDeclName(), Loc), Var); | |||
16866 | ||||
16867 | // According to the blocks spec, the capture of a variable from | |||
16868 | // the stack requires a const copy constructor. This is not true | |||
16869 | // of the copy/move done to move a __block variable to the heap. | |||
16870 | if (!Result.isInvalid() && | |||
16871 | !Result.get()->getType().isConstQualified()) { | |||
16872 | Result = ImpCastExprToType(Result.get(), | |||
16873 | Result.get()->getType().withConst(), | |||
16874 | CK_NoOp, VK_LValue); | |||
16875 | } | |||
16876 | ||||
16877 | if (!Result.isInvalid()) { | |||
16878 | Result = PerformCopyInitialization( | |||
16879 | InitializedEntity::InitializeBlock(Var->getLocation(), | |||
16880 | Cap.getCaptureType()), | |||
16881 | Loc, Result.get()); | |||
16882 | } | |||
16883 | ||||
16884 | // Build a full-expression copy expression if initialization | |||
16885 | // succeeded and used a non-trivial constructor. Recover from | |||
16886 | // errors by pretending that the copy isn't necessary. | |||
16887 | if (!Result.isInvalid() && | |||
16888 | !cast<CXXConstructExpr>(Result.get())->getConstructor() | |||
16889 | ->isTrivial()) { | |||
16890 | Result = MaybeCreateExprWithCleanups(Result); | |||
16891 | CopyExpr = Result.get(); | |||
16892 | } | |||
16893 | } | |||
16894 | } | |||
16895 | ||||
16896 | BlockDecl::Capture NewCap(Var, Cap.isBlockCapture(), Cap.isNested(), | |||
16897 | CopyExpr); | |||
16898 | Captures.push_back(NewCap); | |||
16899 | } | |||
16900 | BD->setCaptures(Context, Captures, BSI->CXXThisCaptureIndex != 0); | |||
16901 | ||||
16902 | // Pop the block scope now but keep it alive to the end of this function. | |||
16903 | AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); | |||
16904 | PoppedFunctionScopePtr ScopeRAII = PopFunctionScopeInfo(&WP, BD, BlockTy); | |||
16905 | ||||
16906 | BlockExpr *Result = new (Context) BlockExpr(BD, BlockTy); | |||
16907 | ||||
16908 | // If the block isn't obviously global, i.e. it captures anything at | |||
16909 | // all, then we need to do a few things in the surrounding context: | |||
16910 | if (Result->getBlockDecl()->hasCaptures()) { | |||
16911 | // First, this expression has a new cleanup object. | |||
16912 | ExprCleanupObjects.push_back(Result->getBlockDecl()); | |||
16913 | Cleanup.setExprNeedsCleanups(true); | |||
16914 | ||||
16915 | // It also gets a branch-protected scope if any of the captured | |||
16916 | // variables needs destruction. | |||
16917 | for (const auto &CI : Result->getBlockDecl()->captures()) { | |||
16918 | const VarDecl *var = CI.getVariable(); | |||
16919 | if (var->getType().isDestructedType() != QualType::DK_none) { | |||
16920 | setFunctionHasBranchProtectedScope(); | |||
16921 | break; | |||
16922 | } | |||
16923 | } | |||
16924 | } | |||
16925 | ||||
16926 | if (getCurFunction()) | |||
16927 | getCurFunction()->addBlock(BD); | |||
16928 | ||||
16929 | return Result; | |||
16930 | } | |||
16931 | ||||
16932 | ExprResult Sema::ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, | |||
16933 | SourceLocation RPLoc) { | |||
16934 | TypeSourceInfo *TInfo; | |||
16935 | GetTypeFromParser(Ty, &TInfo); | |||
16936 | return BuildVAArgExpr(BuiltinLoc, E, TInfo, RPLoc); | |||
16937 | } | |||
16938 | ||||
16939 | ExprResult Sema::BuildVAArgExpr(SourceLocation BuiltinLoc, | |||
16940 | Expr *E, TypeSourceInfo *TInfo, | |||
16941 | SourceLocation RPLoc) { | |||
16942 | Expr *OrigExpr = E; | |||
16943 | bool IsMS = false; | |||
16944 | ||||
16945 | // CUDA device code does not support varargs. | |||
16946 | if (getLangOpts().CUDA && getLangOpts().CUDAIsDevice) { | |||
16947 | if (const FunctionDecl *F = dyn_cast<FunctionDecl>(CurContext)) { | |||
16948 | CUDAFunctionTarget T = IdentifyCUDATarget(F); | |||
16949 | if (T == CFT_Global || T == CFT_Device || T == CFT_HostDevice) | |||
16950 | return ExprError(Diag(E->getBeginLoc(), diag::err_va_arg_in_device)); | |||
16951 | } | |||
16952 | } | |||
16953 | ||||
16954 | // NVPTX does not support va_arg expression. | |||
16955 | if (getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && | |||
16956 | Context.getTargetInfo().getTriple().isNVPTX()) | |||
16957 | targetDiag(E->getBeginLoc(), diag::err_va_arg_in_device); | |||
16958 | ||||
16959 | // It might be a __builtin_ms_va_list. (But don't ever mark a va_arg() | |||
16960 | // as Microsoft ABI on an actual Microsoft platform, where | |||
16961 | // __builtin_ms_va_list and __builtin_va_list are the same.) | |||
16962 | if (!E->isTypeDependent() && Context.getTargetInfo().hasBuiltinMSVaList() && | |||
16963 | Context.getTargetInfo().getBuiltinVaListKind() != TargetInfo::CharPtrBuiltinVaList) { | |||
16964 | QualType MSVaListType = Context.getBuiltinMSVaListType(); | |||
16965 | if (Context.hasSameType(MSVaListType, E->getType())) { | |||
16966 | if (CheckForModifiableLvalue(E, BuiltinLoc, *this)) | |||
16967 | return ExprError(); | |||
16968 | IsMS = true; | |||
16969 | } | |||
16970 | } | |||
16971 | ||||
16972 | // Get the va_list type | |||
16973 | QualType VaListType = Context.getBuiltinVaListType(); | |||
16974 | if (!IsMS) { | |||
16975 | if (VaListType->isArrayType()) { | |||
16976 | // Deal with implicit array decay; for example, on x86-64, | |||
16977 | // va_list is an array, but it's supposed to decay to | |||
16978 | // a pointer for va_arg. | |||
16979 | VaListType = Context.getArrayDecayedType(VaListType); | |||
16980 | // Make sure the input expression also decays appropriately. | |||
16981 | ExprResult Result = UsualUnaryConversions(E); | |||
16982 | if (Result.isInvalid()) | |||
16983 | return ExprError(); | |||
16984 | E = Result.get(); | |||
16985 | } else if (VaListType->isRecordType() && getLangOpts().CPlusPlus) { | |||
16986 | // If va_list is a record type and we are compiling in C++ mode, | |||
16987 | // check the argument using reference binding. | |||
16988 | InitializedEntity Entity = InitializedEntity::InitializeParameter( | |||
16989 | Context, Context.getLValueReferenceType(VaListType), false); | |||
16990 | ExprResult Init = PerformCopyInitialization(Entity, SourceLocation(), E); | |||
16991 | if (Init.isInvalid()) | |||
16992 | return ExprError(); | |||
16993 | E = Init.getAs<Expr>(); | |||
16994 | } else { | |||
16995 | // Otherwise, the va_list argument must be an l-value because | |||
16996 | // it is modified by va_arg. | |||
16997 | if (!E->isTypeDependent() && | |||
16998 | CheckForModifiableLvalue(E, BuiltinLoc, *this)) | |||
16999 | return ExprError(); | |||
17000 | } | |||
17001 | } | |||
17002 | ||||
17003 | if (!IsMS && !E->isTypeDependent() && | |||
17004 | !Context.hasSameType(VaListType, E->getType())) | |||
17005 | return ExprError( | |||
17006 | Diag(E->getBeginLoc(), | |||
17007 | diag::err_first_argument_to_va_arg_not_of_type_va_list) | |||
17008 | << OrigExpr->getType() << E->getSourceRange()); | |||
17009 | ||||
17010 | if (!TInfo->getType()->isDependentType()) { | |||
17011 | if (RequireCompleteType(TInfo->getTypeLoc().getBeginLoc(), TInfo->getType(), | |||
17012 | diag::err_second_parameter_to_va_arg_incomplete, | |||
17013 | TInfo->getTypeLoc())) | |||
17014 | return ExprError(); | |||
17015 | ||||
17016 | if (RequireNonAbstractType(TInfo->getTypeLoc().getBeginLoc(), | |||
17017 | TInfo->getType(), | |||
17018 | diag::err_second_parameter_to_va_arg_abstract, | |||
17019 | TInfo->getTypeLoc())) | |||
17020 | return ExprError(); | |||
17021 | ||||
17022 | if (!TInfo->getType().isPODType(Context)) { | |||
17023 | Diag(TInfo->getTypeLoc().getBeginLoc(), | |||
17024 | TInfo->getType()->isObjCLifetimeType() | |||
17025 | ? diag::warn_second_parameter_to_va_arg_ownership_qualified | |||
17026 | : diag::warn_second_parameter_to_va_arg_not_pod) | |||
17027 | << TInfo->getType() | |||
17028 | << TInfo->getTypeLoc().getSourceRange(); | |||
17029 | } | |||
17030 | ||||
17031 | // Check for va_arg where arguments of the given type will be promoted | |||
17032 | // (i.e. this va_arg is guaranteed to have undefined behavior). | |||
17033 | QualType PromoteType; | |||
17034 | if (Context.isPromotableIntegerType(TInfo->getType())) { | |||
17035 | PromoteType = Context.getPromotedIntegerType(TInfo->getType()); | |||
17036 | // [cstdarg.syn]p1 defers the C++ behavior to what the C standard says, | |||
17037 | // and C2x 7.16.1.1p2 says, in part: | |||
17038 | // If type is not compatible with the type of the actual next argument | |||
17039 | // (as promoted according to the default argument promotions), the | |||
17040 | // behavior is undefined, except for the following cases: | |||
17041 | // - both types are pointers to qualified or unqualified versions of | |||
17042 | // compatible types; | |||
17043 | // - one type is a signed integer type, the other type is the | |||
17044 | // corresponding unsigned integer type, and the value is | |||
17045 | // representable in both types; | |||
17046 | // - one type is pointer to qualified or unqualified void and the | |||
17047 | // other is a pointer to a qualified or unqualified character type. | |||
17048 | // Given that type compatibility is the primary requirement (ignoring | |||
17049 | // qualifications), you would think we could call typesAreCompatible() | |||
17050 | // directly to test this. However, in C++, that checks for *same type*, | |||
17051 | // which causes false positives when passing an enumeration type to | |||
17052 | // va_arg. Instead, get the underlying type of the enumeration and pass | |||
17053 | // that. | |||
17054 | QualType UnderlyingType = TInfo->getType(); | |||
17055 | if (const auto *ET = UnderlyingType->getAs<EnumType>()) | |||
17056 | UnderlyingType = ET->getDecl()->getIntegerType(); | |||
17057 | if (Context.typesAreCompatible(PromoteType, UnderlyingType, | |||
17058 | /*CompareUnqualified*/ true)) | |||
17059 | PromoteType = QualType(); | |||
17060 | ||||
17061 | // If the types are still not compatible, we need to test whether the | |||
17062 | // promoted type and the underlying type are the same except for | |||
17063 | // signedness. Ask the AST for the correctly corresponding type and see | |||
17064 | // if that's compatible. | |||
17065 | if (!PromoteType.isNull() && !UnderlyingType->isBooleanType() && | |||
17066 | PromoteType->isUnsignedIntegerType() != | |||
17067 | UnderlyingType->isUnsignedIntegerType()) { | |||
17068 | UnderlyingType = | |||
17069 | UnderlyingType->isUnsignedIntegerType() | |||
17070 | ? Context.getCorrespondingSignedType(UnderlyingType) | |||
17071 | : Context.getCorrespondingUnsignedType(UnderlyingType); | |||
17072 | if (Context.typesAreCompatible(PromoteType, UnderlyingType, | |||
17073 | /*CompareUnqualified*/ true)) | |||
17074 | PromoteType = QualType(); | |||
17075 | } | |||
17076 | } | |||
17077 | if (TInfo->getType()->isSpecificBuiltinType(BuiltinType::Float)) | |||
17078 | PromoteType = Context.DoubleTy; | |||
17079 | if (!PromoteType.isNull()) | |||
17080 | DiagRuntimeBehavior(TInfo->getTypeLoc().getBeginLoc(), E, | |||
17081 | PDiag(diag::warn_second_parameter_to_va_arg_never_compatible) | |||
17082 | << TInfo->getType() | |||
17083 | << PromoteType | |||
17084 | << TInfo->getTypeLoc().getSourceRange()); | |||
17085 | } | |||
17086 | ||||
17087 | QualType T = TInfo->getType().getNonLValueExprType(Context); | |||
17088 | return new (Context) VAArgExpr(BuiltinLoc, E, TInfo, RPLoc, T, IsMS); | |||
17089 | } | |||
17090 | ||||
17091 | ExprResult Sema::ActOnGNUNullExpr(SourceLocation TokenLoc) { | |||
17092 | // The type of __null will be int or long, depending on the size of | |||
17093 | // pointers on the target. | |||
17094 | QualType Ty; | |||
17095 | unsigned pw = Context.getTargetInfo().getPointerWidth(LangAS::Default); | |||
17096 | if (pw == Context.getTargetInfo().getIntWidth()) | |||
17097 | Ty = Context.IntTy; | |||
17098 | else if (pw == Context.getTargetInfo().getLongWidth()) | |||
17099 | Ty = Context.LongTy; | |||
17100 | else if (pw == Context.getTargetInfo().getLongLongWidth()) | |||
17101 | Ty = Context.LongLongTy; | |||
17102 | else { | |||
17103 | llvm_unreachable("I don't know size of pointer!")::llvm::llvm_unreachable_internal("I don't know size of pointer!" , "clang/lib/Sema/SemaExpr.cpp", 17103); | |||
17104 | } | |||
17105 | ||||
17106 | return new (Context) GNUNullExpr(Ty, TokenLoc); | |||
17107 | } | |||
17108 | ||||
17109 | static CXXRecordDecl *LookupStdSourceLocationImpl(Sema &S, SourceLocation Loc) { | |||
17110 | CXXRecordDecl *ImplDecl = nullptr; | |||
17111 | ||||
17112 | // Fetch the std::source_location::__impl decl. | |||
17113 | if (NamespaceDecl *Std = S.getStdNamespace()) { | |||
17114 | LookupResult ResultSL(S, &S.PP.getIdentifierTable().get("source_location"), | |||
17115 | Loc, Sema::LookupOrdinaryName); | |||
17116 | if (S.LookupQualifiedName(ResultSL, Std)) { | |||
17117 | if (auto *SLDecl = ResultSL.getAsSingle<RecordDecl>()) { | |||
17118 | LookupResult ResultImpl(S, &S.PP.getIdentifierTable().get("__impl"), | |||
17119 | Loc, Sema::LookupOrdinaryName); | |||
17120 | if ((SLDecl->isCompleteDefinition() || SLDecl->isBeingDefined()) && | |||
17121 | S.LookupQualifiedName(ResultImpl, SLDecl)) { | |||
17122 | ImplDecl = ResultImpl.getAsSingle<CXXRecordDecl>(); | |||
17123 | } | |||
17124 | } | |||
17125 | } | |||
17126 | } | |||
17127 | ||||
17128 | if (!ImplDecl || !ImplDecl->isCompleteDefinition()) { | |||
17129 | S.Diag(Loc, diag::err_std_source_location_impl_not_found); | |||
17130 | return nullptr; | |||
17131 | } | |||
17132 | ||||
17133 | // Verify that __impl is a trivial struct type, with no base classes, and with | |||
17134 | // only the four expected fields. | |||
17135 | if (ImplDecl->isUnion() || !ImplDecl->isStandardLayout() || | |||
17136 | ImplDecl->getNumBases() != 0) { | |||
17137 | S.Diag(Loc, diag::err_std_source_location_impl_malformed); | |||
17138 | return nullptr; | |||
17139 | } | |||
17140 | ||||
17141 | unsigned Count = 0; | |||
17142 | for (FieldDecl *F : ImplDecl->fields()) { | |||
17143 | StringRef Name = F->getName(); | |||
17144 | ||||
17145 | if (Name == "_M_file_name") { | |||
17146 | if (F->getType() != | |||
17147 | S.Context.getPointerType(S.Context.CharTy.withConst())) | |||
17148 | break; | |||
17149 | Count++; | |||
17150 | } else if (Name == "_M_function_name") { | |||
17151 | if (F->getType() != | |||
17152 | S.Context.getPointerType(S.Context.CharTy.withConst())) | |||
17153 | break; | |||
17154 | Count++; | |||
17155 | } else if (Name == "_M_line") { | |||
17156 | if (!F->getType()->isIntegerType()) | |||
17157 | break; | |||
17158 | Count++; | |||
17159 | } else if (Name == "_M_column") { | |||
17160 | if (!F->getType()->isIntegerType()) | |||
17161 | break; | |||
17162 | Count++; | |||
17163 | } else { | |||
17164 | Count = 100; // invalid | |||
17165 | break; | |||
17166 | } | |||
17167 | } | |||
17168 | if (Count != 4) { | |||
17169 | S.Diag(Loc, diag::err_std_source_location_impl_malformed); | |||
17170 | return nullptr; | |||
17171 | } | |||
17172 | ||||
17173 | return ImplDecl; | |||
17174 | } | |||
17175 | ||||
17176 | ExprResult Sema::ActOnSourceLocExpr(SourceLocExpr::IdentKind Kind, | |||
17177 | SourceLocation BuiltinLoc, | |||
17178 | SourceLocation RPLoc) { | |||
17179 | QualType ResultTy; | |||
17180 | switch (Kind) { | |||
17181 | case SourceLocExpr::File: | |||
17182 | case SourceLocExpr::FileName: | |||
17183 | case SourceLocExpr::Function: { | |||
17184 | QualType ArrTy = Context.getStringLiteralArrayType(Context.CharTy, 0); | |||
17185 | ResultTy = | |||
17186 | Context.getPointerType(ArrTy->getAsArrayTypeUnsafe()->getElementType()); | |||
17187 | break; | |||
17188 | } | |||
17189 | case SourceLocExpr::Line: | |||
17190 | case SourceLocExpr::Column: | |||
17191 | ResultTy = Context.UnsignedIntTy; | |||
17192 | break; | |||
17193 | case SourceLocExpr::SourceLocStruct: | |||
17194 | if (!StdSourceLocationImplDecl) { | |||
17195 | StdSourceLocationImplDecl = | |||
17196 | LookupStdSourceLocationImpl(*this, BuiltinLoc); | |||
17197 | if (!StdSourceLocationImplDecl) | |||
17198 | return ExprError(); | |||
17199 | } | |||
17200 | ResultTy = Context.getPointerType( | |||
17201 | Context.getRecordType(StdSourceLocationImplDecl).withConst()); | |||
17202 | break; | |||
17203 | } | |||
17204 | ||||
17205 | return BuildSourceLocExpr(Kind, ResultTy, BuiltinLoc, RPLoc, CurContext); | |||
17206 | } | |||
17207 | ||||
17208 | ExprResult Sema::BuildSourceLocExpr(SourceLocExpr::IdentKind Kind, | |||
17209 | QualType ResultTy, | |||
17210 | SourceLocation BuiltinLoc, | |||
17211 | SourceLocation RPLoc, | |||
17212 | DeclContext *ParentContext) { | |||
17213 | return new (Context) | |||
17214 | SourceLocExpr(Context, Kind, ResultTy, BuiltinLoc, RPLoc, ParentContext); | |||
17215 | } | |||
17216 | ||||
17217 | bool Sema::CheckConversionToObjCLiteral(QualType DstType, Expr *&Exp, | |||
17218 | bool Diagnose) { | |||
17219 | if (!getLangOpts().ObjC) | |||
17220 | return false; | |||
17221 | ||||
17222 | const ObjCObjectPointerType *PT = DstType->getAs<ObjCObjectPointerType>(); | |||
17223 | if (!PT) | |||
17224 | return false; | |||
17225 | const ObjCInterfaceDecl *ID = PT->getInterfaceDecl(); | |||
17226 | ||||
17227 | // Ignore any parens, implicit casts (should only be | |||
17228 | // array-to-pointer decays), and not-so-opaque values. The last is | |||
17229 | // important for making this trigger for property assignments. | |||
17230 | Expr *SrcExpr = Exp->IgnoreParenImpCasts(); | |||
17231 | if (OpaqueValueExpr *OV = dyn_cast<OpaqueValueExpr>(SrcExpr)) | |||
17232 | if (OV->getSourceExpr()) | |||
17233 | SrcExpr = OV->getSourceExpr()->IgnoreParenImpCasts(); | |||
17234 | ||||
17235 | if (auto *SL = dyn_cast<StringLiteral>(SrcExpr)) { | |||
17236 | if (!PT->isObjCIdType() && | |||
17237 | !(ID && ID->getIdentifier()->isStr("NSString"))) | |||
17238 | return false; | |||
17239 | if (!SL->isOrdinary()) | |||
17240 | return false; | |||
17241 | ||||
17242 | if (Diagnose) { | |||
17243 | Diag(SL->getBeginLoc(), diag::err_missing_atsign_prefix) | |||
17244 | << /*string*/0 << FixItHint::CreateInsertion(SL->getBeginLoc(), "@"); | |||
17245 | Exp = BuildObjCStringLiteral(SL->getBeginLoc(), SL).get(); | |||
17246 | } | |||
17247 | return true; | |||
17248 | } | |||
17249 | ||||
17250 | if ((isa<IntegerLiteral>(SrcExpr) || isa<CharacterLiteral>(SrcExpr) || | |||
17251 | isa<FloatingLiteral>(SrcExpr) || isa<ObjCBoolLiteralExpr>(SrcExpr) || | |||
17252 | isa<CXXBoolLiteralExpr>(SrcExpr)) && | |||
17253 | !SrcExpr->isNullPointerConstant( | |||
17254 | getASTContext(), Expr::NPC_NeverValueDependent)) { | |||
17255 | if (!ID || !ID->getIdentifier()->isStr("NSNumber")) | |||
17256 | return false; | |||
17257 | if (Diagnose) { | |||
17258 | Diag(SrcExpr->getBeginLoc(), diag::err_missing_atsign_prefix) | |||
17259 | << /*number*/1 | |||
17260 | << FixItHint::CreateInsertion(SrcExpr->getBeginLoc(), "@"); | |||
17261 | Expr *NumLit = | |||
17262 | BuildObjCNumericLiteral(SrcExpr->getBeginLoc(), SrcExpr).get(); | |||
17263 | if (NumLit) | |||
17264 | Exp = NumLit; | |||
17265 | } | |||
17266 | return true; | |||
17267 | } | |||
17268 | ||||
17269 | return false; | |||
17270 | } | |||
17271 | ||||
17272 | static bool maybeDiagnoseAssignmentToFunction(Sema &S, QualType DstType, | |||
17273 | const Expr *SrcExpr) { | |||
17274 | if (!DstType->isFunctionPointerType() || | |||
17275 | !SrcExpr->getType()->isFunctionType()) | |||
17276 | return false; | |||
17277 | ||||
17278 | auto *DRE = dyn_cast<DeclRefExpr>(SrcExpr->IgnoreParenImpCasts()); | |||
17279 | if (!DRE) | |||
17280 | return false; | |||
17281 | ||||
17282 | auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl()); | |||
17283 | if (!FD) | |||
17284 | return false; | |||
17285 | ||||
17286 | return !S.checkAddressOfFunctionIsAvailable(FD, | |||
17287 | /*Complain=*/true, | |||
17288 | SrcExpr->getBeginLoc()); | |||
17289 | } | |||
17290 | ||||
17291 | bool Sema::DiagnoseAssignmentResult(AssignConvertType ConvTy, | |||
17292 | SourceLocation Loc, | |||
17293 | QualType DstType, QualType SrcType, | |||
17294 | Expr *SrcExpr, AssignmentAction Action, | |||
17295 | bool *Complained) { | |||
17296 | if (Complained) | |||
17297 | *Complained = false; | |||
17298 | ||||
17299 | // Decode the result (notice that AST's are still created for extensions). | |||
17300 | bool CheckInferredResultType = false; | |||
17301 | bool isInvalid = false; | |||
17302 | unsigned DiagKind = 0; | |||
17303 | ConversionFixItGenerator ConvHints; | |||
17304 | bool MayHaveConvFixit = false; | |||
17305 | bool MayHaveFunctionDiff = false; | |||
17306 | const ObjCInterfaceDecl *IFace = nullptr; | |||
17307 | const ObjCProtocolDecl *PDecl = nullptr; | |||
17308 | ||||
17309 | switch (ConvTy) { | |||
17310 | case Compatible: | |||
17311 | DiagnoseAssignmentEnum(DstType, SrcType, SrcExpr); | |||
17312 | return false; | |||
17313 | ||||
17314 | case PointerToInt: | |||
17315 | if (getLangOpts().CPlusPlus) { | |||
17316 | DiagKind = diag::err_typecheck_convert_pointer_int; | |||
17317 | isInvalid = true; | |||
17318 | } else { | |||
17319 | DiagKind = diag::ext_typecheck_convert_pointer_int; | |||
17320 | } | |||
17321 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17322 | MayHaveConvFixit = true; | |||
17323 | break; | |||
17324 | case IntToPointer: | |||
17325 | if (getLangOpts().CPlusPlus) { | |||
17326 | DiagKind = diag::err_typecheck_convert_int_pointer; | |||
17327 | isInvalid = true; | |||
17328 | } else { | |||
17329 | DiagKind = diag::ext_typecheck_convert_int_pointer; | |||
17330 | } | |||
17331 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17332 | MayHaveConvFixit = true; | |||
17333 | break; | |||
17334 | case IncompatibleFunctionPointerStrict: | |||
17335 | DiagKind = | |||
17336 | diag::warn_typecheck_convert_incompatible_function_pointer_strict; | |||
17337 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17338 | MayHaveConvFixit = true; | |||
17339 | break; | |||
17340 | case IncompatibleFunctionPointer: | |||
17341 | if (getLangOpts().CPlusPlus) { | |||
17342 | DiagKind = diag::err_typecheck_convert_incompatible_function_pointer; | |||
17343 | isInvalid = true; | |||
17344 | } else { | |||
17345 | DiagKind = diag::ext_typecheck_convert_incompatible_function_pointer; | |||
17346 | } | |||
17347 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17348 | MayHaveConvFixit = true; | |||
17349 | break; | |||
17350 | case IncompatiblePointer: | |||
17351 | if (Action == AA_Passing_CFAudited) { | |||
17352 | DiagKind = diag::err_arc_typecheck_convert_incompatible_pointer; | |||
17353 | } else if (getLangOpts().CPlusPlus) { | |||
17354 | DiagKind = diag::err_typecheck_convert_incompatible_pointer; | |||
17355 | isInvalid = true; | |||
17356 | } else { | |||
17357 | DiagKind = diag::ext_typecheck_convert_incompatible_pointer; | |||
17358 | } | |||
17359 | CheckInferredResultType = DstType->isObjCObjectPointerType() && | |||
17360 | SrcType->isObjCObjectPointerType(); | |||
17361 | if (!CheckInferredResultType) { | |||
17362 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17363 | } else if (CheckInferredResultType) { | |||
17364 | SrcType = SrcType.getUnqualifiedType(); | |||
17365 | DstType = DstType.getUnqualifiedType(); | |||
17366 | } | |||
17367 | MayHaveConvFixit = true; | |||
17368 | break; | |||
17369 | case IncompatiblePointerSign: | |||
17370 | if (getLangOpts().CPlusPlus) { | |||
17371 | DiagKind = diag::err_typecheck_convert_incompatible_pointer_sign; | |||
17372 | isInvalid = true; | |||
17373 | } else { | |||
17374 | DiagKind = diag::ext_typecheck_convert_incompatible_pointer_sign; | |||
17375 | } | |||
17376 | break; | |||
17377 | case FunctionVoidPointer: | |||
17378 | if (getLangOpts().CPlusPlus) { | |||
17379 | DiagKind = diag::err_typecheck_convert_pointer_void_func; | |||
17380 | isInvalid = true; | |||
17381 | } else { | |||
17382 | DiagKind = diag::ext_typecheck_convert_pointer_void_func; | |||
17383 | } | |||
17384 | break; | |||
17385 | case IncompatiblePointerDiscardsQualifiers: { | |||
17386 | // Perform array-to-pointer decay if necessary. | |||
17387 | if (SrcType->isArrayType()) SrcType = Context.getArrayDecayedType(SrcType); | |||
17388 | ||||
17389 | isInvalid = true; | |||
17390 | ||||
17391 | Qualifiers lhq = SrcType->getPointeeType().getQualifiers(); | |||
17392 | Qualifiers rhq = DstType->getPointeeType().getQualifiers(); | |||
17393 | if (lhq.getAddressSpace() != rhq.getAddressSpace()) { | |||
17394 | DiagKind = diag::err_typecheck_incompatible_address_space; | |||
17395 | break; | |||
17396 | ||||
17397 | } else if (lhq.getObjCLifetime() != rhq.getObjCLifetime()) { | |||
17398 | DiagKind = diag::err_typecheck_incompatible_ownership; | |||
17399 | break; | |||
17400 | } | |||
17401 | ||||
17402 | llvm_unreachable("unknown error case for discarding qualifiers!")::llvm::llvm_unreachable_internal("unknown error case for discarding qualifiers!" , "clang/lib/Sema/SemaExpr.cpp", 17402); | |||
17403 | // fallthrough | |||
17404 | } | |||
17405 | case CompatiblePointerDiscardsQualifiers: | |||
17406 | // If the qualifiers lost were because we were applying the | |||
17407 | // (deprecated) C++ conversion from a string literal to a char* | |||
17408 | // (or wchar_t*), then there was no error (C++ 4.2p2). FIXME: | |||
17409 | // Ideally, this check would be performed in | |||
17410 | // checkPointerTypesForAssignment. However, that would require a | |||
17411 | // bit of refactoring (so that the second argument is an | |||
17412 | // expression, rather than a type), which should be done as part | |||
17413 | // of a larger effort to fix checkPointerTypesForAssignment for | |||
17414 | // C++ semantics. | |||
17415 | if (getLangOpts().CPlusPlus && | |||
17416 | IsStringLiteralToNonConstPointerConversion(SrcExpr, DstType)) | |||
17417 | return false; | |||
17418 | if (getLangOpts().CPlusPlus) { | |||
17419 | DiagKind = diag::err_typecheck_convert_discards_qualifiers; | |||
17420 | isInvalid = true; | |||
17421 | } else { | |||
17422 | DiagKind = diag::ext_typecheck_convert_discards_qualifiers; | |||
17423 | } | |||
17424 | ||||
17425 | break; | |||
17426 | case IncompatibleNestedPointerQualifiers: | |||
17427 | if (getLangOpts().CPlusPlus) { | |||
17428 | isInvalid = true; | |||
17429 | DiagKind = diag::err_nested_pointer_qualifier_mismatch; | |||
17430 | } else { | |||
17431 | DiagKind = diag::ext_nested_pointer_qualifier_mismatch; | |||
17432 | } | |||
17433 | break; | |||
17434 | case IncompatibleNestedPointerAddressSpaceMismatch: | |||
17435 | DiagKind = diag::err_typecheck_incompatible_nested_address_space; | |||
17436 | isInvalid = true; | |||
17437 | break; | |||
17438 | case IntToBlockPointer: | |||
17439 | DiagKind = diag::err_int_to_block_pointer; | |||
17440 | isInvalid = true; | |||
17441 | break; | |||
17442 | case IncompatibleBlockPointer: | |||
17443 | DiagKind = diag::err_typecheck_convert_incompatible_block_pointer; | |||
17444 | isInvalid = true; | |||
17445 | break; | |||
17446 | case IncompatibleObjCQualifiedId: { | |||
17447 | if (SrcType->isObjCQualifiedIdType()) { | |||
17448 | const ObjCObjectPointerType *srcOPT = | |||
17449 | SrcType->castAs<ObjCObjectPointerType>(); | |||
17450 | for (auto *srcProto : srcOPT->quals()) { | |||
17451 | PDecl = srcProto; | |||
17452 | break; | |||
17453 | } | |||
17454 | if (const ObjCInterfaceType *IFaceT = | |||
17455 | DstType->castAs<ObjCObjectPointerType>()->getInterfaceType()) | |||
17456 | IFace = IFaceT->getDecl(); | |||
17457 | } | |||
17458 | else if (DstType->isObjCQualifiedIdType()) { | |||
17459 | const ObjCObjectPointerType *dstOPT = | |||
17460 | DstType->castAs<ObjCObjectPointerType>(); | |||
17461 | for (auto *dstProto : dstOPT->quals()) { | |||
17462 | PDecl = dstProto; | |||
17463 | break; | |||
17464 | } | |||
17465 | if (const ObjCInterfaceType *IFaceT = | |||
17466 | SrcType->castAs<ObjCObjectPointerType>()->getInterfaceType()) | |||
17467 | IFace = IFaceT->getDecl(); | |||
17468 | } | |||
17469 | if (getLangOpts().CPlusPlus) { | |||
17470 | DiagKind = diag::err_incompatible_qualified_id; | |||
17471 | isInvalid = true; | |||
17472 | } else { | |||
17473 | DiagKind = diag::warn_incompatible_qualified_id; | |||
17474 | } | |||
17475 | break; | |||
17476 | } | |||
17477 | case IncompatibleVectors: | |||
17478 | if (getLangOpts().CPlusPlus) { | |||
17479 | DiagKind = diag::err_incompatible_vectors; | |||
17480 | isInvalid = true; | |||
17481 | } else { | |||
17482 | DiagKind = diag::warn_incompatible_vectors; | |||
17483 | } | |||
17484 | break; | |||
17485 | case IncompatibleObjCWeakRef: | |||
17486 | DiagKind = diag::err_arc_weak_unavailable_assign; | |||
17487 | isInvalid = true; | |||
17488 | break; | |||
17489 | case Incompatible: | |||
17490 | if (maybeDiagnoseAssignmentToFunction(*this, DstType, SrcExpr)) { | |||
17491 | if (Complained) | |||
17492 | *Complained = true; | |||
17493 | return true; | |||
17494 | } | |||
17495 | ||||
17496 | DiagKind = diag::err_typecheck_convert_incompatible; | |||
17497 | ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this); | |||
17498 | MayHaveConvFixit = true; | |||
17499 | isInvalid = true; | |||
17500 | MayHaveFunctionDiff = true; | |||
17501 | break; | |||
17502 | } | |||
17503 | ||||
17504 | QualType FirstType, SecondType; | |||
17505 | switch (Action) { | |||
17506 | case AA_Assigning: | |||
17507 | case AA_Initializing: | |||
17508 | // The destination type comes first. | |||
17509 | FirstType = DstType; | |||
17510 | SecondType = SrcType; | |||
17511 | break; | |||
17512 | ||||
17513 | case AA_Returning: | |||
17514 | case AA_Passing: | |||
17515 | case AA_Passing_CFAudited: | |||
17516 | case AA_Converting: | |||
17517 | case AA_Sending: | |||
17518 | case AA_Casting: | |||
17519 | // The source type comes first. | |||
17520 | FirstType = SrcType; | |||
17521 | SecondType = DstType; | |||
17522 | break; | |||
17523 | } | |||
17524 | ||||
17525 | PartialDiagnostic FDiag = PDiag(DiagKind); | |||
17526 | AssignmentAction ActionForDiag = Action; | |||
17527 | if (Action == AA_Passing_CFAudited) | |||
17528 | ActionForDiag = AA_Passing; | |||
17529 | ||||
17530 | FDiag << FirstType << SecondType << ActionForDiag | |||
17531 | << SrcExpr->getSourceRange(); | |||
17532 | ||||
17533 | if (DiagKind == diag::ext_typecheck_convert_incompatible_pointer_sign || | |||
17534 | DiagKind == diag::err_typecheck_convert_incompatible_pointer_sign) { | |||
17535 | auto isPlainChar = [](const clang::Type *Type) { | |||
17536 | return Type->isSpecificBuiltinType(BuiltinType::Char_S) || | |||
17537 | Type->isSpecificBuiltinType(BuiltinType::Char_U); | |||
17538 | }; | |||
17539 | FDiag << (isPlainChar(FirstType->getPointeeOrArrayElementType()) || | |||
17540 | isPlainChar(SecondType->getPointeeOrArrayElementType())); | |||
17541 | } | |||
17542 | ||||
17543 | // If we can fix the conversion, suggest the FixIts. | |||
17544 | if (!ConvHints.isNull()) { | |||
17545 | for (FixItHint &H : ConvHints.Hints) | |||
17546 | FDiag << H; | |||
17547 | } | |||
17548 | ||||
17549 | if (MayHaveConvFixit) { FDiag << (unsigned) (ConvHints.Kind); } | |||
17550 | ||||
17551 | if (MayHaveFunctionDiff) | |||
17552 | HandleFunctionTypeMismatch(FDiag, SecondType, FirstType); | |||
17553 | ||||
17554 | Diag(Loc, FDiag); | |||
17555 | if ((DiagKind == diag::warn_incompatible_qualified_id || | |||
17556 | DiagKind == diag::err_incompatible_qualified_id) && | |||
17557 | PDecl && IFace && !IFace->hasDefinition()) | |||
17558 | Diag(IFace->getLocation(), diag::note_incomplete_class_and_qualified_id) | |||
17559 | << IFace << PDecl; | |||
17560 | ||||
17561 | if (SecondType == Context.OverloadTy) | |||
17562 | NoteAllOverloadCandidates(OverloadExpr::find(SrcExpr).Expression, | |||
17563 | FirstType, /*TakingAddress=*/true); | |||
17564 | ||||
17565 | if (CheckInferredResultType) | |||
17566 | EmitRelatedResultTypeNote(SrcExpr); | |||
17567 | ||||
17568 | if (Action == AA_Returning && ConvTy == IncompatiblePointer) | |||
17569 | EmitRelatedResultTypeNoteForReturn(DstType); | |||
17570 | ||||
17571 | if (Complained) | |||
17572 | *Complained = true; | |||
17573 | return isInvalid; | |||
17574 | } | |||
17575 | ||||
17576 | ExprResult Sema::VerifyIntegerConstantExpression(Expr *E, | |||
17577 | llvm::APSInt *Result, | |||
17578 | AllowFoldKind CanFold) { | |||
17579 | class SimpleICEDiagnoser : public VerifyICEDiagnoser { | |||
17580 | public: | |||
17581 | SemaDiagnosticBuilder diagnoseNotICEType(Sema &S, SourceLocation Loc, | |||
17582 | QualType T) override { | |||
17583 | return S.Diag(Loc, diag::err_ice_not_integral) | |||
17584 | << T << S.LangOpts.CPlusPlus; | |||
17585 | } | |||
17586 | SemaDiagnosticBuilder diagnoseNotICE(Sema &S, SourceLocation Loc) override { | |||
17587 | return S.Diag(Loc, diag::err_expr_not_ice) << S.LangOpts.CPlusPlus; | |||
17588 | } | |||
17589 | } Diagnoser; | |||
17590 | ||||
17591 | return VerifyIntegerConstantExpression(E, Result, Diagnoser, CanFold); | |||
17592 | } | |||
17593 | ||||
17594 | ExprResult Sema::VerifyIntegerConstantExpression(Expr *E, | |||
17595 | llvm::APSInt *Result, | |||
17596 | unsigned DiagID, | |||
17597 | AllowFoldKind CanFold) { | |||
17598 | class IDDiagnoser : public VerifyICEDiagnoser { | |||
17599 | unsigned DiagID; | |||
17600 | ||||
17601 | public: | |||
17602 | IDDiagnoser(unsigned DiagID) | |||
17603 | : VerifyICEDiagnoser(DiagID == 0), DiagID(DiagID) { } | |||
17604 | ||||
17605 | SemaDiagnosticBuilder diagnoseNotICE(Sema &S, SourceLocation Loc) override { | |||
17606 | return S.Diag(Loc, DiagID); | |||
17607 | } | |||
17608 | } Diagnoser(DiagID); | |||
17609 | ||||
17610 | return VerifyIntegerConstantExpression(E, Result, Diagnoser, CanFold); | |||
17611 | } | |||
17612 | ||||
17613 | Sema::SemaDiagnosticBuilder | |||
17614 | Sema::VerifyICEDiagnoser::diagnoseNotICEType(Sema &S, SourceLocation Loc, | |||
17615 | QualType T) { | |||
17616 | return diagnoseNotICE(S, Loc); | |||
17617 | } | |||
17618 | ||||
17619 | Sema::SemaDiagnosticBuilder | |||
17620 | Sema::VerifyICEDiagnoser::diagnoseFold(Sema &S, SourceLocation Loc) { | |||
17621 | return S.Diag(Loc, diag::ext_expr_not_ice) << S.LangOpts.CPlusPlus; | |||
17622 | } | |||
17623 | ||||
17624 | ExprResult | |||
17625 | Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, | |||
17626 | VerifyICEDiagnoser &Diagnoser, | |||
17627 | AllowFoldKind CanFold) { | |||
17628 | SourceLocation DiagLoc = E->getBeginLoc(); | |||
17629 | ||||
17630 | if (getLangOpts().CPlusPlus11) { | |||
17631 | // C++11 [expr.const]p5: | |||
17632 | // If an expression of literal class type is used in a context where an | |||
17633 | // integral constant expression is required, then that class type shall | |||
17634 | // have a single non-explicit conversion function to an integral or | |||
17635 | // unscoped enumeration type | |||
17636 | ExprResult Converted; | |||
17637 | class CXX11ConvertDiagnoser : public ICEConvertDiagnoser { | |||
17638 | VerifyICEDiagnoser &BaseDiagnoser; | |||
17639 | public: | |||
17640 | CXX11ConvertDiagnoser(VerifyICEDiagnoser &BaseDiagnoser) | |||
17641 | : ICEConvertDiagnoser(/*AllowScopedEnumerations*/ false, | |||
17642 | BaseDiagnoser.Suppress, true), | |||
17643 | BaseDiagnoser(BaseDiagnoser) {} | |||
17644 | ||||
17645 | SemaDiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc, | |||
17646 | QualType T) override { | |||
17647 | return BaseDiagnoser.diagnoseNotICEType(S, Loc, T); | |||
17648 | } | |||
17649 | ||||
17650 | SemaDiagnosticBuilder diagnoseIncomplete( | |||
17651 | Sema &S, SourceLocation Loc, QualType T) override { | |||
17652 | return S.Diag(Loc, diag::err_ice_incomplete_type) << T; | |||
17653 | } | |||
17654 | ||||
17655 | SemaDiagnosticBuilder diagnoseExplicitConv( | |||
17656 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) override { | |||
17657 | return S.Diag(Loc, diag::err_ice_explicit_conversion) << T << ConvTy; | |||
17658 | } | |||
17659 | ||||
17660 | SemaDiagnosticBuilder noteExplicitConv( | |||
17661 | Sema &S, CXXConversionDecl *Conv, QualType ConvTy) override { | |||
17662 | return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here) | |||
17663 | << ConvTy->isEnumeralType() << ConvTy; | |||
17664 | } | |||
17665 | ||||
17666 | SemaDiagnosticBuilder diagnoseAmbiguous( | |||
17667 | Sema &S, SourceLocation Loc, QualType T) override { | |||
17668 | return S.Diag(Loc, diag::err_ice_ambiguous_conversion) << T; | |||
17669 | } | |||
17670 | ||||
17671 | SemaDiagnosticBuilder noteAmbiguous( | |||
17672 | Sema &S, CXXConversionDecl *Conv, QualType ConvTy) override { | |||
17673 | return S.Diag(Conv->getLocation(), diag::note_ice_conversion_here) | |||
17674 | << ConvTy->isEnumeralType() << ConvTy; | |||
17675 | } | |||
17676 | ||||
17677 | SemaDiagnosticBuilder diagnoseConversion( | |||
17678 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) override { | |||
17679 | llvm_unreachable("conversion functions are permitted")::llvm::llvm_unreachable_internal("conversion functions are permitted" , "clang/lib/Sema/SemaExpr.cpp", 17679); | |||
17680 | } | |||
17681 | } ConvertDiagnoser(Diagnoser); | |||
17682 | ||||
17683 | Converted = PerformContextualImplicitConversion(DiagLoc, E, | |||
17684 | ConvertDiagnoser); | |||
17685 | if (Converted.isInvalid()) | |||
17686 | return Converted; | |||
17687 | E = Converted.get(); | |||
17688 | if (!E->getType()->isIntegralOrUnscopedEnumerationType()) | |||
17689 | return ExprError(); | |||
17690 | } else if (!E->getType()->isIntegralOrUnscopedEnumerationType()) { | |||
17691 | // An ICE must be of integral or unscoped enumeration type. | |||
17692 | if (!Diagnoser.Suppress) | |||
17693 | Diagnoser.diagnoseNotICEType(*this, DiagLoc, E->getType()) | |||
17694 | << E->getSourceRange(); | |||
17695 | return ExprError(); | |||
17696 | } | |||
17697 | ||||
17698 | ExprResult RValueExpr = DefaultLvalueConversion(E); | |||
17699 | if (RValueExpr.isInvalid()) | |||
17700 | return ExprError(); | |||
17701 | ||||
17702 | E = RValueExpr.get(); | |||
17703 | ||||
17704 | // Circumvent ICE checking in C++11 to avoid evaluating the expression twice | |||
17705 | // in the non-ICE case. | |||
17706 | if (!getLangOpts().CPlusPlus11 && E->isIntegerConstantExpr(Context)) { | |||
17707 | if (Result) | |||
17708 | *Result = E->EvaluateKnownConstIntCheckOverflow(Context); | |||
17709 | if (!isa<ConstantExpr>(E)) | |||
17710 | E = Result ? ConstantExpr::Create(Context, E, APValue(*Result)) | |||
17711 | : ConstantExpr::Create(Context, E); | |||
17712 | return E; | |||
17713 | } | |||
17714 | ||||
17715 | Expr::EvalResult EvalResult; | |||
17716 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
17717 | EvalResult.Diag = &Notes; | |||
17718 | ||||
17719 | // Try to evaluate the expression, and produce diagnostics explaining why it's | |||
17720 | // not a constant expression as a side-effect. | |||
17721 | bool Folded = | |||
17722 | E->EvaluateAsRValue(EvalResult, Context, /*isConstantContext*/ true) && | |||
17723 | EvalResult.Val.isInt() && !EvalResult.HasSideEffects; | |||
17724 | ||||
17725 | if (!isa<ConstantExpr>(E)) | |||
17726 | E = ConstantExpr::Create(Context, E, EvalResult.Val); | |||
17727 | ||||
17728 | // In C++11, we can rely on diagnostics being produced for any expression | |||
17729 | // which is not a constant expression. If no diagnostics were produced, then | |||
17730 | // this is a constant expression. | |||
17731 | if (Folded && getLangOpts().CPlusPlus11 && Notes.empty()) { | |||
17732 | if (Result) | |||
17733 | *Result = EvalResult.Val.getInt(); | |||
17734 | return E; | |||
17735 | } | |||
17736 | ||||
17737 | // If our only note is the usual "invalid subexpression" note, just point | |||
17738 | // the caret at its location rather than producing an essentially | |||
17739 | // redundant note. | |||
17740 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | |||
17741 | diag::note_invalid_subexpr_in_const_expr) { | |||
17742 | DiagLoc = Notes[0].first; | |||
17743 | Notes.clear(); | |||
17744 | } | |||
17745 | ||||
17746 | if (!Folded || !CanFold) { | |||
17747 | if (!Diagnoser.Suppress) { | |||
17748 | Diagnoser.diagnoseNotICE(*this, DiagLoc) << E->getSourceRange(); | |||
17749 | for (const PartialDiagnosticAt &Note : Notes) | |||
17750 | Diag(Note.first, Note.second); | |||
17751 | } | |||
17752 | ||||
17753 | return ExprError(); | |||
17754 | } | |||
17755 | ||||
17756 | Diagnoser.diagnoseFold(*this, DiagLoc) << E->getSourceRange(); | |||
17757 | for (const PartialDiagnosticAt &Note : Notes) | |||
17758 | Diag(Note.first, Note.second); | |||
17759 | ||||
17760 | if (Result) | |||
17761 | *Result = EvalResult.Val.getInt(); | |||
17762 | return E; | |||
17763 | } | |||
17764 | ||||
17765 | namespace { | |||
17766 | // Handle the case where we conclude a expression which we speculatively | |||
17767 | // considered to be unevaluated is actually evaluated. | |||
17768 | class TransformToPE : public TreeTransform<TransformToPE> { | |||
17769 | typedef TreeTransform<TransformToPE> BaseTransform; | |||
17770 | ||||
17771 | public: | |||
17772 | TransformToPE(Sema &SemaRef) : BaseTransform(SemaRef) { } | |||
17773 | ||||
17774 | // Make sure we redo semantic analysis | |||
17775 | bool AlwaysRebuild() { return true; } | |||
17776 | bool ReplacingOriginal() { return true; } | |||
17777 | ||||
17778 | // We need to special-case DeclRefExprs referring to FieldDecls which | |||
17779 | // are not part of a member pointer formation; normal TreeTransforming | |||
17780 | // doesn't catch this case because of the way we represent them in the AST. | |||
17781 | // FIXME: This is a bit ugly; is it really the best way to handle this | |||
17782 | // case? | |||
17783 | // | |||
17784 | // Error on DeclRefExprs referring to FieldDecls. | |||
17785 | ExprResult TransformDeclRefExpr(DeclRefExpr *E) { | |||
17786 | if (isa<FieldDecl>(E->getDecl()) && | |||
17787 | !SemaRef.isUnevaluatedContext()) | |||
17788 | return SemaRef.Diag(E->getLocation(), | |||
17789 | diag::err_invalid_non_static_member_use) | |||
17790 | << E->getDecl() << E->getSourceRange(); | |||
17791 | ||||
17792 | return BaseTransform::TransformDeclRefExpr(E); | |||
17793 | } | |||
17794 | ||||
17795 | // Exception: filter out member pointer formation | |||
17796 | ExprResult TransformUnaryOperator(UnaryOperator *E) { | |||
17797 | if (E->getOpcode() == UO_AddrOf && E->getType()->isMemberPointerType()) | |||
17798 | return E; | |||
17799 | ||||
17800 | return BaseTransform::TransformUnaryOperator(E); | |||
17801 | } | |||
17802 | ||||
17803 | // The body of a lambda-expression is in a separate expression evaluation | |||
17804 | // context so never needs to be transformed. | |||
17805 | // FIXME: Ideally we wouldn't transform the closure type either, and would | |||
17806 | // just recreate the capture expressions and lambda expression. | |||
17807 | StmtResult TransformLambdaBody(LambdaExpr *E, Stmt *Body) { | |||
17808 | return SkipLambdaBody(E, Body); | |||
17809 | } | |||
17810 | }; | |||
17811 | } | |||
17812 | ||||
17813 | ExprResult Sema::TransformToPotentiallyEvaluated(Expr *E) { | |||
17814 | assert(isUnevaluatedContext() &&(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "clang/lib/Sema/SemaExpr.cpp", 17815, __extension__ __PRETTY_FUNCTION__ )) | |||
17815 | "Should only transform unevaluated expressions")(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "clang/lib/Sema/SemaExpr.cpp", 17815, __extension__ __PRETTY_FUNCTION__ )); | |||
17816 | ExprEvalContexts.back().Context = | |||
17817 | ExprEvalContexts[ExprEvalContexts.size()-2].Context; | |||
17818 | if (isUnevaluatedContext()) | |||
17819 | return E; | |||
17820 | return TransformToPE(*this).TransformExpr(E); | |||
17821 | } | |||
17822 | ||||
17823 | TypeSourceInfo *Sema::TransformToPotentiallyEvaluated(TypeSourceInfo *TInfo) { | |||
17824 | assert(isUnevaluatedContext() &&(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "clang/lib/Sema/SemaExpr.cpp", 17825, __extension__ __PRETTY_FUNCTION__ )) | |||
17825 | "Should only transform unevaluated expressions")(static_cast <bool> (isUnevaluatedContext() && "Should only transform unevaluated expressions" ) ? void (0) : __assert_fail ("isUnevaluatedContext() && \"Should only transform unevaluated expressions\"" , "clang/lib/Sema/SemaExpr.cpp", 17825, __extension__ __PRETTY_FUNCTION__ )); | |||
17826 | ExprEvalContexts.back().Context = | |||
17827 | ExprEvalContexts[ExprEvalContexts.size() - 2].Context; | |||
17828 | if (isUnevaluatedContext()) | |||
17829 | return TInfo; | |||
17830 | return TransformToPE(*this).TransformType(TInfo); | |||
17831 | } | |||
17832 | ||||
17833 | void | |||
17834 | Sema::PushExpressionEvaluationContext( | |||
17835 | ExpressionEvaluationContext NewContext, Decl *LambdaContextDecl, | |||
17836 | ExpressionEvaluationContextRecord::ExpressionKind ExprContext) { | |||
17837 | ExprEvalContexts.emplace_back(NewContext, ExprCleanupObjects.size(), Cleanup, | |||
17838 | LambdaContextDecl, ExprContext); | |||
17839 | ||||
17840 | // Discarded statements and immediate contexts nested in other | |||
17841 | // discarded statements or immediate context are themselves | |||
17842 | // a discarded statement or an immediate context, respectively. | |||
17843 | ExprEvalContexts.back().InDiscardedStatement = | |||
17844 | ExprEvalContexts[ExprEvalContexts.size() - 2] | |||
17845 | .isDiscardedStatementContext(); | |||
17846 | ExprEvalContexts.back().InImmediateFunctionContext = | |||
17847 | ExprEvalContexts[ExprEvalContexts.size() - 2] | |||
17848 | .isImmediateFunctionContext(); | |||
17849 | ||||
17850 | Cleanup.reset(); | |||
17851 | if (!MaybeODRUseExprs.empty()) | |||
17852 | std::swap(MaybeODRUseExprs, ExprEvalContexts.back().SavedMaybeODRUseExprs); | |||
17853 | } | |||
17854 | ||||
17855 | void | |||
17856 | Sema::PushExpressionEvaluationContext( | |||
17857 | ExpressionEvaluationContext NewContext, ReuseLambdaContextDecl_t, | |||
17858 | ExpressionEvaluationContextRecord::ExpressionKind ExprContext) { | |||
17859 | Decl *ClosureContextDecl = ExprEvalContexts.back().ManglingContextDecl; | |||
17860 | PushExpressionEvaluationContext(NewContext, ClosureContextDecl, ExprContext); | |||
17861 | } | |||
17862 | ||||
17863 | namespace { | |||
17864 | ||||
17865 | const DeclRefExpr *CheckPossibleDeref(Sema &S, const Expr *PossibleDeref) { | |||
17866 | PossibleDeref = PossibleDeref->IgnoreParenImpCasts(); | |||
17867 | if (const auto *E = dyn_cast<UnaryOperator>(PossibleDeref)) { | |||
17868 | if (E->getOpcode() == UO_Deref) | |||
17869 | return CheckPossibleDeref(S, E->getSubExpr()); | |||
17870 | } else if (const auto *E = dyn_cast<ArraySubscriptExpr>(PossibleDeref)) { | |||
17871 | return CheckPossibleDeref(S, E->getBase()); | |||
17872 | } else if (const auto *E = dyn_cast<MemberExpr>(PossibleDeref)) { | |||
17873 | return CheckPossibleDeref(S, E->getBase()); | |||
17874 | } else if (const auto E = dyn_cast<DeclRefExpr>(PossibleDeref)) { | |||
17875 | QualType Inner; | |||
17876 | QualType Ty = E->getType(); | |||
17877 | if (const auto *Ptr = Ty->getAs<PointerType>()) | |||
17878 | Inner = Ptr->getPointeeType(); | |||
17879 | else if (const auto *Arr = S.Context.getAsArrayType(Ty)) | |||
17880 | Inner = Arr->getElementType(); | |||
17881 | else | |||
17882 | return nullptr; | |||
17883 | ||||
17884 | if (Inner->hasAttr(attr::NoDeref)) | |||
17885 | return E; | |||
17886 | } | |||
17887 | return nullptr; | |||
17888 | } | |||
17889 | ||||
17890 | } // namespace | |||
17891 | ||||
17892 | void Sema::WarnOnPendingNoDerefs(ExpressionEvaluationContextRecord &Rec) { | |||
17893 | for (const Expr *E : Rec.PossibleDerefs) { | |||
17894 | const DeclRefExpr *DeclRef = CheckPossibleDeref(*this, E); | |||
17895 | if (DeclRef) { | |||
17896 | const ValueDecl *Decl = DeclRef->getDecl(); | |||
17897 | Diag(E->getExprLoc(), diag::warn_dereference_of_noderef_type) | |||
17898 | << Decl->getName() << E->getSourceRange(); | |||
17899 | Diag(Decl->getLocation(), diag::note_previous_decl) << Decl->getName(); | |||
17900 | } else { | |||
17901 | Diag(E->getExprLoc(), diag::warn_dereference_of_noderef_type_no_decl) | |||
17902 | << E->getSourceRange(); | |||
17903 | } | |||
17904 | } | |||
17905 | Rec.PossibleDerefs.clear(); | |||
17906 | } | |||
17907 | ||||
17908 | /// Check whether E, which is either a discarded-value expression or an | |||
17909 | /// unevaluated operand, is a simple-assignment to a volatlie-qualified lvalue, | |||
17910 | /// and if so, remove it from the list of volatile-qualified assignments that | |||
17911 | /// we are going to warn are deprecated. | |||
17912 | void Sema::CheckUnusedVolatileAssignment(Expr *E) { | |||
17913 | if (!E->getType().isVolatileQualified() || !getLangOpts().CPlusPlus20) | |||
17914 | return; | |||
17915 | ||||
17916 | // Note: ignoring parens here is not justified by the standard rules, but | |||
17917 | // ignoring parentheses seems like a more reasonable approach, and this only | |||
17918 | // drives a deprecation warning so doesn't affect conformance. | |||
17919 | if (auto *BO = dyn_cast<BinaryOperator>(E->IgnoreParenImpCasts())) { | |||
17920 | if (BO->getOpcode() == BO_Assign) { | |||
17921 | auto &LHSs = ExprEvalContexts.back().VolatileAssignmentLHSs; | |||
17922 | llvm::erase_value(LHSs, BO->getLHS()); | |||
17923 | } | |||
17924 | } | |||
17925 | } | |||
17926 | ||||
17927 | ExprResult Sema::CheckForImmediateInvocation(ExprResult E, FunctionDecl *Decl) { | |||
17928 | if (isUnevaluatedContext() || !E.isUsable() || !Decl || | |||
17929 | !Decl->isConsteval() || isConstantEvaluated() || | |||
17930 | isCheckingDefaultArgumentOrInitializer() || | |||
17931 | RebuildingImmediateInvocation || isImmediateFunctionContext()) | |||
17932 | return E; | |||
17933 | ||||
17934 | /// Opportunistically remove the callee from ReferencesToConsteval if we can. | |||
17935 | /// It's OK if this fails; we'll also remove this in | |||
17936 | /// HandleImmediateInvocations, but catching it here allows us to avoid | |||
17937 | /// walking the AST looking for it in simple cases. | |||
17938 | if (auto *Call = dyn_cast<CallExpr>(E.get()->IgnoreImplicit())) | |||
17939 | if (auto *DeclRef = | |||
17940 | dyn_cast<DeclRefExpr>(Call->getCallee()->IgnoreImplicit())) | |||
17941 | ExprEvalContexts.back().ReferenceToConsteval.erase(DeclRef); | |||
17942 | ||||
17943 | E = MaybeCreateExprWithCleanups(E); | |||
17944 | ||||
17945 | ConstantExpr *Res = ConstantExpr::Create( | |||
17946 | getASTContext(), E.get(), | |||
17947 | ConstantExpr::getStorageKind(Decl->getReturnType().getTypePtr(), | |||
17948 | getASTContext()), | |||
17949 | /*IsImmediateInvocation*/ true); | |||
17950 | /// Value-dependent constant expressions should not be immediately | |||
17951 | /// evaluated until they are instantiated. | |||
17952 | if (!Res->isValueDependent()) | |||
17953 | ExprEvalContexts.back().ImmediateInvocationCandidates.emplace_back(Res, 0); | |||
17954 | return Res; | |||
17955 | } | |||
17956 | ||||
17957 | static void EvaluateAndDiagnoseImmediateInvocation( | |||
17958 | Sema &SemaRef, Sema::ImmediateInvocationCandidate Candidate) { | |||
17959 | llvm::SmallVector<PartialDiagnosticAt, 8> Notes; | |||
17960 | Expr::EvalResult Eval; | |||
17961 | Eval.Diag = &Notes; | |||
17962 | ConstantExpr *CE = Candidate.getPointer(); | |||
17963 | bool Result = CE->EvaluateAsConstantExpr( | |||
17964 | Eval, SemaRef.getASTContext(), ConstantExprKind::ImmediateInvocation); | |||
17965 | if (!Result || !Notes.empty()) { | |||
17966 | SemaRef.FailedImmediateInvocations.insert(CE); | |||
17967 | Expr *InnerExpr = CE->getSubExpr()->IgnoreImplicit(); | |||
17968 | if (auto *FunctionalCast = dyn_cast<CXXFunctionalCastExpr>(InnerExpr)) | |||
17969 | InnerExpr = FunctionalCast->getSubExpr(); | |||
17970 | FunctionDecl *FD = nullptr; | |||
17971 | if (auto *Call = dyn_cast<CallExpr>(InnerExpr)) | |||
17972 | FD = cast<FunctionDecl>(Call->getCalleeDecl()); | |||
17973 | else if (auto *Call = dyn_cast<CXXConstructExpr>(InnerExpr)) | |||
17974 | FD = Call->getConstructor(); | |||
17975 | else | |||
17976 | llvm_unreachable("unhandled decl kind")::llvm::llvm_unreachable_internal("unhandled decl kind", "clang/lib/Sema/SemaExpr.cpp" , 17976); | |||
17977 | assert(FD && FD->isConsteval())(static_cast <bool> (FD && FD->isConsteval() ) ? void (0) : __assert_fail ("FD && FD->isConsteval()" , "clang/lib/Sema/SemaExpr.cpp", 17977, __extension__ __PRETTY_FUNCTION__ )); | |||
17978 | SemaRef.Diag(CE->getBeginLoc(), diag::err_invalid_consteval_call) << FD; | |||
17979 | if (auto Context = | |||
17980 | SemaRef.InnermostDeclarationWithDelayedImmediateInvocations()) { | |||
17981 | SemaRef.Diag(Context->Loc, diag::note_invalid_consteval_initializer) | |||
17982 | << Context->Decl; | |||
17983 | SemaRef.Diag(Context->Decl->getBeginLoc(), diag::note_declared_at); | |||
17984 | } | |||
17985 | for (auto &Note : Notes) | |||
17986 | SemaRef.Diag(Note.first, Note.second); | |||
17987 | return; | |||
17988 | } | |||
17989 | CE->MoveIntoResult(Eval.Val, SemaRef.getASTContext()); | |||
17990 | } | |||
17991 | ||||
17992 | static void RemoveNestedImmediateInvocation( | |||
17993 | Sema &SemaRef, Sema::ExpressionEvaluationContextRecord &Rec, | |||
17994 | SmallVector<Sema::ImmediateInvocationCandidate, 4>::reverse_iterator It) { | |||
17995 | struct ComplexRemove : TreeTransform<ComplexRemove> { | |||
17996 | using Base = TreeTransform<ComplexRemove>; | |||
17997 | llvm::SmallPtrSetImpl<DeclRefExpr *> &DRSet; | |||
17998 | SmallVector<Sema::ImmediateInvocationCandidate, 4> &IISet; | |||
17999 | SmallVector<Sema::ImmediateInvocationCandidate, 4>::reverse_iterator | |||
18000 | CurrentII; | |||
18001 | ComplexRemove(Sema &SemaRef, llvm::SmallPtrSetImpl<DeclRefExpr *> &DR, | |||
18002 | SmallVector<Sema::ImmediateInvocationCandidate, 4> &II, | |||
18003 | SmallVector<Sema::ImmediateInvocationCandidate, | |||
18004 | 4>::reverse_iterator Current) | |||
18005 | : Base(SemaRef), DRSet(DR), IISet(II), CurrentII(Current) {} | |||
18006 | void RemoveImmediateInvocation(ConstantExpr* E) { | |||
18007 | auto It = std::find_if(CurrentII, IISet.rend(), | |||
18008 | [E](Sema::ImmediateInvocationCandidate Elem) { | |||
18009 | return Elem.getPointer() == E; | |||
18010 | }); | |||
18011 | // It is possible that some subexpression of the current immediate | |||
18012 | // invocation was handled from another expression evaluation context. Do | |||
18013 | // not handle the current immediate invocation if some of its | |||
18014 | // subexpressions failed before. | |||
18015 | if (It == IISet.rend()) { | |||
18016 | if (SemaRef.FailedImmediateInvocations.contains(E)) | |||
18017 | CurrentII->setInt(1); | |||
18018 | } else { | |||
18019 | It->setInt(1); // Mark as deleted | |||
18020 | } | |||
18021 | } | |||
18022 | ExprResult TransformConstantExpr(ConstantExpr *E) { | |||
18023 | if (!E->isImmediateInvocation()) | |||
18024 | return Base::TransformConstantExpr(E); | |||
18025 | RemoveImmediateInvocation(E); | |||
18026 | return Base::TransformExpr(E->getSubExpr()); | |||
18027 | } | |||
18028 | /// Base::TransfromCXXOperatorCallExpr doesn't traverse the callee so | |||
18029 | /// we need to remove its DeclRefExpr from the DRSet. | |||
18030 | ExprResult TransformCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | |||
18031 | DRSet.erase(cast<DeclRefExpr>(E->getCallee()->IgnoreImplicit())); | |||
18032 | return Base::TransformCXXOperatorCallExpr(E); | |||
18033 | } | |||
18034 | /// Base::TransformInitializer skip ConstantExpr so we need to visit them | |||
18035 | /// here. | |||
18036 | ExprResult TransformInitializer(Expr *Init, bool NotCopyInit) { | |||
18037 | if (!Init) | |||
18038 | return Init; | |||
18039 | /// ConstantExpr are the first layer of implicit node to be removed so if | |||
18040 | /// Init isn't a ConstantExpr, no ConstantExpr will be skipped. | |||
18041 | if (auto *CE = dyn_cast<ConstantExpr>(Init)) | |||
18042 | if (CE->isImmediateInvocation()) | |||
18043 | RemoveImmediateInvocation(CE); | |||
18044 | return Base::TransformInitializer(Init, NotCopyInit); | |||
18045 | } | |||
18046 | ExprResult TransformDeclRefExpr(DeclRefExpr *E) { | |||
18047 | DRSet.erase(E); | |||
18048 | return E; | |||
18049 | } | |||
18050 | ExprResult TransformLambdaExpr(LambdaExpr *E) { | |||
18051 | // Do not rebuild lambdas to avoid creating a new type. | |||
18052 | // Lambdas have already been processed inside their eval context. | |||
18053 | return E; | |||
18054 | } | |||
18055 | bool AlwaysRebuild() { return false; } | |||
18056 | bool ReplacingOriginal() { return true; } | |||
18057 | bool AllowSkippingCXXConstructExpr() { | |||
18058 | bool Res = AllowSkippingFirstCXXConstructExpr; | |||
18059 | AllowSkippingFirstCXXConstructExpr = true; | |||
18060 | return Res; | |||
18061 | } | |||
18062 | bool AllowSkippingFirstCXXConstructExpr = true; | |||
18063 | } Transformer(SemaRef, Rec.ReferenceToConsteval, | |||
18064 | Rec.ImmediateInvocationCandidates, It); | |||
18065 | ||||
18066 | /// CXXConstructExpr with a single argument are getting skipped by | |||
18067 | /// TreeTransform in some situtation because they could be implicit. This | |||
18068 | /// can only occur for the top-level CXXConstructExpr because it is used | |||
18069 | /// nowhere in the expression being transformed therefore will not be rebuilt. | |||
18070 | /// Setting AllowSkippingFirstCXXConstructExpr to false will prevent from | |||
18071 | /// skipping the first CXXConstructExpr. | |||
18072 | if (isa<CXXConstructExpr>(It->getPointer()->IgnoreImplicit())) | |||
18073 | Transformer.AllowSkippingFirstCXXConstructExpr = false; | |||
18074 | ||||
18075 | ExprResult Res = Transformer.TransformExpr(It->getPointer()->getSubExpr()); | |||
18076 | // The result may not be usable in case of previous compilation errors. | |||
18077 | // In this case evaluation of the expression may result in crash so just | |||
18078 | // don't do anything further with the result. | |||
18079 | if (Res.isUsable()) { | |||
18080 | Res = SemaRef.MaybeCreateExprWithCleanups(Res); | |||
18081 | It->getPointer()->setSubExpr(Res.get()); | |||
18082 | } | |||
18083 | } | |||
18084 | ||||
18085 | static void | |||
18086 | HandleImmediateInvocations(Sema &SemaRef, | |||
18087 | Sema::ExpressionEvaluationContextRecord &Rec) { | |||
18088 | if ((Rec.ImmediateInvocationCandidates.size() == 0 && | |||
18089 | Rec.ReferenceToConsteval.size() == 0) || | |||
18090 | SemaRef.RebuildingImmediateInvocation) | |||
18091 | return; | |||
18092 | ||||
18093 | /// When we have more than 1 ImmediateInvocationCandidates or previously | |||
18094 | /// failed immediate invocations, we need to check for nested | |||
18095 | /// ImmediateInvocationCandidates in order to avoid duplicate diagnostics. | |||
18096 | /// Otherwise we only need to remove ReferenceToConsteval in the immediate | |||
18097 | /// invocation. | |||
18098 | if (Rec.ImmediateInvocationCandidates.size() > 1 || | |||
18099 | !SemaRef.FailedImmediateInvocations.empty()) { | |||
18100 | ||||
18101 | /// Prevent sema calls during the tree transform from adding pointers that | |||
18102 | /// are already in the sets. | |||
18103 | llvm::SaveAndRestore DisableIITracking( | |||
18104 | SemaRef.RebuildingImmediateInvocation, true); | |||
18105 | ||||
18106 | /// Prevent diagnostic during tree transfrom as they are duplicates | |||
18107 | Sema::TentativeAnalysisScope DisableDiag(SemaRef); | |||
18108 | ||||
18109 | for (auto It = Rec.ImmediateInvocationCandidates.rbegin(); | |||
18110 | It != Rec.ImmediateInvocationCandidates.rend(); It++) | |||
18111 | if (!It->getInt()) | |||
18112 | RemoveNestedImmediateInvocation(SemaRef, Rec, It); | |||
18113 | } else if (Rec.ImmediateInvocationCandidates.size() == 1 && | |||
18114 | Rec.ReferenceToConsteval.size()) { | |||
18115 | struct SimpleRemove : RecursiveASTVisitor<SimpleRemove> { | |||
18116 | llvm::SmallPtrSetImpl<DeclRefExpr *> &DRSet; | |||
18117 | SimpleRemove(llvm::SmallPtrSetImpl<DeclRefExpr *> &S) : DRSet(S) {} | |||
18118 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
18119 | DRSet.erase(E); | |||
18120 | return DRSet.size(); | |||
18121 | } | |||
18122 | } Visitor(Rec.ReferenceToConsteval); | |||
18123 | Visitor.TraverseStmt( | |||
18124 | Rec.ImmediateInvocationCandidates.front().getPointer()->getSubExpr()); | |||
18125 | } | |||
18126 | for (auto CE : Rec.ImmediateInvocationCandidates) | |||
18127 | if (!CE.getInt()) | |||
18128 | EvaluateAndDiagnoseImmediateInvocation(SemaRef, CE); | |||
18129 | for (auto *DR : Rec.ReferenceToConsteval) { | |||
18130 | NamedDecl *ND = cast<FunctionDecl>(DR->getDecl()); | |||
18131 | if (auto *MD = llvm::dyn_cast<CXXMethodDecl>(ND); | |||
18132 | MD && (MD->isLambdaStaticInvoker() || isLambdaCallOperator(MD))) | |||
18133 | ND = MD->getParent(); | |||
18134 | SemaRef.Diag(DR->getBeginLoc(), diag::err_invalid_consteval_take_address) | |||
18135 | << ND << isa<CXXRecordDecl>(ND); | |||
18136 | SemaRef.Diag(ND->getLocation(), diag::note_declared_at); | |||
18137 | } | |||
18138 | } | |||
18139 | ||||
18140 | void Sema::PopExpressionEvaluationContext() { | |||
18141 | ExpressionEvaluationContextRecord& Rec = ExprEvalContexts.back(); | |||
18142 | unsigned NumTypos = Rec.NumTypos; | |||
18143 | ||||
18144 | if (!Rec.Lambdas.empty()) { | |||
18145 | using ExpressionKind = ExpressionEvaluationContextRecord::ExpressionKind; | |||
18146 | if (!getLangOpts().CPlusPlus20 && | |||
18147 | (Rec.ExprContext == ExpressionKind::EK_TemplateArgument || | |||
18148 | Rec.isUnevaluated() || | |||
18149 | (Rec.isConstantEvaluated() && !getLangOpts().CPlusPlus17))) { | |||
18150 | unsigned D; | |||
18151 | if (Rec.isUnevaluated()) { | |||
18152 | // C++11 [expr.prim.lambda]p2: | |||
18153 | // A lambda-expression shall not appear in an unevaluated operand | |||
18154 | // (Clause 5). | |||
18155 | D = diag::err_lambda_unevaluated_operand; | |||
18156 | } else if (Rec.isConstantEvaluated() && !getLangOpts().CPlusPlus17) { | |||
18157 | // C++1y [expr.const]p2: | |||
18158 | // A conditional-expression e is a core constant expression unless the | |||
18159 | // evaluation of e, following the rules of the abstract machine, would | |||
18160 | // evaluate [...] a lambda-expression. | |||
18161 | D = diag::err_lambda_in_constant_expression; | |||
18162 | } else if (Rec.ExprContext == ExpressionKind::EK_TemplateArgument) { | |||
18163 | // C++17 [expr.prim.lamda]p2: | |||
18164 | // A lambda-expression shall not appear [...] in a template-argument. | |||
18165 | D = diag::err_lambda_in_invalid_context; | |||
18166 | } else | |||
18167 | llvm_unreachable("Couldn't infer lambda error message.")::llvm::llvm_unreachable_internal("Couldn't infer lambda error message." , "clang/lib/Sema/SemaExpr.cpp", 18167); | |||
18168 | ||||
18169 | for (const auto *L : Rec.Lambdas) | |||
18170 | Diag(L->getBeginLoc(), D); | |||
18171 | } | |||
18172 | } | |||
18173 | ||||
18174 | WarnOnPendingNoDerefs(Rec); | |||
18175 | HandleImmediateInvocations(*this, Rec); | |||
18176 | ||||
18177 | // Warn on any volatile-qualified simple-assignments that are not discarded- | |||
18178 | // value expressions nor unevaluated operands (those cases get removed from | |||
18179 | // this list by CheckUnusedVolatileAssignment). | |||
18180 | for (auto *BO : Rec.VolatileAssignmentLHSs) | |||
18181 | Diag(BO->getBeginLoc(), diag::warn_deprecated_simple_assign_volatile) | |||
18182 | << BO->getType(); | |||
18183 | ||||
18184 | // When are coming out of an unevaluated context, clear out any | |||
18185 | // temporaries that we may have created as part of the evaluation of | |||
18186 | // the expression in that context: they aren't relevant because they | |||
18187 | // will never be constructed. | |||
18188 | if (Rec.isUnevaluated() || Rec.isConstantEvaluated()) { | |||
18189 | ExprCleanupObjects.erase(ExprCleanupObjects.begin() + Rec.NumCleanupObjects, | |||
18190 | ExprCleanupObjects.end()); | |||
18191 | Cleanup = Rec.ParentCleanup; | |||
18192 | CleanupVarDeclMarking(); | |||
18193 | std::swap(MaybeODRUseExprs, Rec.SavedMaybeODRUseExprs); | |||
18194 | // Otherwise, merge the contexts together. | |||
18195 | } else { | |||
18196 | Cleanup.mergeFrom(Rec.ParentCleanup); | |||
18197 | MaybeODRUseExprs.insert(Rec.SavedMaybeODRUseExprs.begin(), | |||
18198 | Rec.SavedMaybeODRUseExprs.end()); | |||
18199 | } | |||
18200 | ||||
18201 | // Pop the current expression evaluation context off the stack. | |||
18202 | ExprEvalContexts.pop_back(); | |||
18203 | ||||
18204 | // The global expression evaluation context record is never popped. | |||
18205 | ExprEvalContexts.back().NumTypos += NumTypos; | |||
18206 | } | |||
18207 | ||||
18208 | void Sema::DiscardCleanupsInEvaluationContext() { | |||
18209 | ExprCleanupObjects.erase( | |||
18210 | ExprCleanupObjects.begin() + ExprEvalContexts.back().NumCleanupObjects, | |||
18211 | ExprCleanupObjects.end()); | |||
18212 | Cleanup.reset(); | |||
18213 | MaybeODRUseExprs.clear(); | |||
18214 | } | |||
18215 | ||||
18216 | ExprResult Sema::HandleExprEvaluationContextForTypeof(Expr *E) { | |||
18217 | ExprResult Result = CheckPlaceholderExpr(E); | |||
18218 | if (Result.isInvalid()) | |||
18219 | return ExprError(); | |||
18220 | E = Result.get(); | |||
18221 | if (!E->getType()->isVariablyModifiedType()) | |||
18222 | return E; | |||
18223 | return TransformToPotentiallyEvaluated(E); | |||
18224 | } | |||
18225 | ||||
18226 | /// Are we in a context that is potentially constant evaluated per C++20 | |||
18227 | /// [expr.const]p12? | |||
18228 | static bool isPotentiallyConstantEvaluatedContext(Sema &SemaRef) { | |||
18229 | /// C++2a [expr.const]p12: | |||
18230 | // An expression or conversion is potentially constant evaluated if it is | |||
18231 | switch (SemaRef.ExprEvalContexts.back().Context) { | |||
18232 | case Sema::ExpressionEvaluationContext::ConstantEvaluated: | |||
18233 | case Sema::ExpressionEvaluationContext::ImmediateFunctionContext: | |||
18234 | ||||
18235 | // -- a manifestly constant-evaluated expression, | |||
18236 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluated: | |||
18237 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
18238 | case Sema::ExpressionEvaluationContext::DiscardedStatement: | |||
18239 | // -- a potentially-evaluated expression, | |||
18240 | case Sema::ExpressionEvaluationContext::UnevaluatedList: | |||
18241 | // -- an immediate subexpression of a braced-init-list, | |||
18242 | ||||
18243 | // -- [FIXME] an expression of the form & cast-expression that occurs | |||
18244 | // within a templated entity | |||
18245 | // -- a subexpression of one of the above that is not a subexpression of | |||
18246 | // a nested unevaluated operand. | |||
18247 | return true; | |||
18248 | ||||
18249 | case Sema::ExpressionEvaluationContext::Unevaluated: | |||
18250 | case Sema::ExpressionEvaluationContext::UnevaluatedAbstract: | |||
18251 | // Expressions in this context are never evaluated. | |||
18252 | return false; | |||
18253 | } | |||
18254 | llvm_unreachable("Invalid context")::llvm::llvm_unreachable_internal("Invalid context", "clang/lib/Sema/SemaExpr.cpp" , 18254); | |||
18255 | } | |||
18256 | ||||
18257 | /// Return true if this function has a calling convention that requires mangling | |||
18258 | /// in the size of the parameter pack. | |||
18259 | static bool funcHasParameterSizeMangling(Sema &S, FunctionDecl *FD) { | |||
18260 | // These manglings don't do anything on non-Windows or non-x86 platforms, so | |||
18261 | // we don't need parameter type sizes. | |||
18262 | const llvm::Triple &TT = S.Context.getTargetInfo().getTriple(); | |||
18263 | if (!TT.isOSWindows() || !TT.isX86()) | |||
18264 | return false; | |||
18265 | ||||
18266 | // If this is C++ and this isn't an extern "C" function, parameters do not | |||
18267 | // need to be complete. In this case, C++ mangling will apply, which doesn't | |||
18268 | // use the size of the parameters. | |||
18269 | if (S.getLangOpts().CPlusPlus && !FD->isExternC()) | |||
18270 | return false; | |||
18271 | ||||
18272 | // Stdcall, fastcall, and vectorcall need this special treatment. | |||
18273 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
18274 | switch (CC) { | |||
18275 | case CC_X86StdCall: | |||
18276 | case CC_X86FastCall: | |||
18277 | case CC_X86VectorCall: | |||
18278 | return true; | |||
18279 | default: | |||
18280 | break; | |||
18281 | } | |||
18282 | return false; | |||
18283 | } | |||
18284 | ||||
18285 | /// Require that all of the parameter types of function be complete. Normally, | |||
18286 | /// parameter types are only required to be complete when a function is called | |||
18287 | /// or defined, but to mangle functions with certain calling conventions, the | |||
18288 | /// mangler needs to know the size of the parameter list. In this situation, | |||
18289 | /// MSVC doesn't emit an error or instantiate templates. Instead, MSVC mangles | |||
18290 | /// the function as _foo@0, i.e. zero bytes of parameters, which will usually | |||
18291 | /// result in a linker error. Clang doesn't implement this behavior, and instead | |||
18292 | /// attempts to error at compile time. | |||
18293 | static void CheckCompleteParameterTypesForMangler(Sema &S, FunctionDecl *FD, | |||
18294 | SourceLocation Loc) { | |||
18295 | class ParamIncompleteTypeDiagnoser : public Sema::TypeDiagnoser { | |||
18296 | FunctionDecl *FD; | |||
18297 | ParmVarDecl *Param; | |||
18298 | ||||
18299 | public: | |||
18300 | ParamIncompleteTypeDiagnoser(FunctionDecl *FD, ParmVarDecl *Param) | |||
18301 | : FD(FD), Param(Param) {} | |||
18302 | ||||
18303 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { | |||
18304 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
18305 | StringRef CCName; | |||
18306 | switch (CC) { | |||
18307 | case CC_X86StdCall: | |||
18308 | CCName = "stdcall"; | |||
18309 | break; | |||
18310 | case CC_X86FastCall: | |||
18311 | CCName = "fastcall"; | |||
18312 | break; | |||
18313 | case CC_X86VectorCall: | |||
18314 | CCName = "vectorcall"; | |||
18315 | break; | |||
18316 | default: | |||
18317 | llvm_unreachable("CC does not need mangling")::llvm::llvm_unreachable_internal("CC does not need mangling" , "clang/lib/Sema/SemaExpr.cpp", 18317); | |||
18318 | } | |||
18319 | ||||
18320 | S.Diag(Loc, diag::err_cconv_incomplete_param_type) | |||
18321 | << Param->getDeclName() << FD->getDeclName() << CCName; | |||
18322 | } | |||
18323 | }; | |||
18324 | ||||
18325 | for (ParmVarDecl *Param : FD->parameters()) { | |||
18326 | ParamIncompleteTypeDiagnoser Diagnoser(FD, Param); | |||
18327 | S.RequireCompleteType(Loc, Param->getType(), Diagnoser); | |||
18328 | } | |||
18329 | } | |||
18330 | ||||
18331 | namespace { | |||
18332 | enum class OdrUseContext { | |||
18333 | /// Declarations in this context are not odr-used. | |||
18334 | None, | |||
18335 | /// Declarations in this context are formally odr-used, but this is a | |||
18336 | /// dependent context. | |||
18337 | Dependent, | |||
18338 | /// Declarations in this context are odr-used but not actually used (yet). | |||
18339 | FormallyOdrUsed, | |||
18340 | /// Declarations in this context are used. | |||
18341 | Used | |||
18342 | }; | |||
18343 | } | |||
18344 | ||||
18345 | /// Are we within a context in which references to resolved functions or to | |||
18346 | /// variables result in odr-use? | |||
18347 | static OdrUseContext isOdrUseContext(Sema &SemaRef) { | |||
18348 | OdrUseContext Result; | |||
18349 | ||||
18350 | switch (SemaRef.ExprEvalContexts.back().Context) { | |||
18351 | case Sema::ExpressionEvaluationContext::Unevaluated: | |||
18352 | case Sema::ExpressionEvaluationContext::UnevaluatedList: | |||
18353 | case Sema::ExpressionEvaluationContext::UnevaluatedAbstract: | |||
18354 | return OdrUseContext::None; | |||
18355 | ||||
18356 | case Sema::ExpressionEvaluationContext::ConstantEvaluated: | |||
18357 | case Sema::ExpressionEvaluationContext::ImmediateFunctionContext: | |||
18358 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluated: | |||
18359 | Result = OdrUseContext::Used; | |||
18360 | break; | |||
18361 | ||||
18362 | case Sema::ExpressionEvaluationContext::DiscardedStatement: | |||
18363 | Result = OdrUseContext::FormallyOdrUsed; | |||
18364 | break; | |||
18365 | ||||
18366 | case Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
18367 | // A default argument formally results in odr-use, but doesn't actually | |||
18368 | // result in a use in any real sense until it itself is used. | |||
18369 | Result = OdrUseContext::FormallyOdrUsed; | |||
18370 | break; | |||
18371 | } | |||
18372 | ||||
18373 | if (SemaRef.CurContext->isDependentContext()) | |||
18374 | return OdrUseContext::Dependent; | |||
18375 | ||||
18376 | return Result; | |||
18377 | } | |||
18378 | ||||
18379 | static bool isImplicitlyDefinableConstexprFunction(FunctionDecl *Func) { | |||
18380 | if (!Func->isConstexpr()) | |||
18381 | return false; | |||
18382 | ||||
18383 | if (Func->isImplicitlyInstantiable() || !Func->isUserProvided()) | |||
18384 | return true; | |||
18385 | auto *CCD = dyn_cast<CXXConstructorDecl>(Func); | |||
18386 | return CCD && CCD->getInheritedConstructor(); | |||
18387 | } | |||
18388 | ||||
18389 | /// Mark a function referenced, and check whether it is odr-used | |||
18390 | /// (C++ [basic.def.odr]p2, C99 6.9p3) | |||
18391 | void Sema::MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func, | |||
18392 | bool MightBeOdrUse) { | |||
18393 | assert(Func && "No function?")(static_cast <bool> (Func && "No function?") ? void (0) : __assert_fail ("Func && \"No function?\"", "clang/lib/Sema/SemaExpr.cpp" , 18393, __extension__ __PRETTY_FUNCTION__)); | |||
18394 | ||||
18395 | Func->setReferenced(); | |||
18396 | ||||
18397 | // Recursive functions aren't really used until they're used from some other | |||
18398 | // context. | |||
18399 | bool IsRecursiveCall = CurContext == Func; | |||
18400 | ||||
18401 | // C++11 [basic.def.odr]p3: | |||
18402 | // A function whose name appears as a potentially-evaluated expression is | |||
18403 | // odr-used if it is the unique lookup result or the selected member of a | |||
18404 | // set of overloaded functions [...]. | |||
18405 | // | |||
18406 | // We (incorrectly) mark overload resolution as an unevaluated context, so we | |||
18407 | // can just check that here. | |||
18408 | OdrUseContext OdrUse = | |||
18409 | MightBeOdrUse ? isOdrUseContext(*this) : OdrUseContext::None; | |||
18410 | if (IsRecursiveCall && OdrUse == OdrUseContext::Used) | |||
18411 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
18412 | ||||
18413 | // Trivial default constructors and destructors are never actually used. | |||
18414 | // FIXME: What about other special members? | |||
18415 | if (Func->isTrivial() && !Func->hasAttr<DLLExportAttr>() && | |||
18416 | OdrUse == OdrUseContext::Used) { | |||
18417 | if (auto *Constructor = dyn_cast<CXXConstructorDecl>(Func)) | |||
18418 | if (Constructor->isDefaultConstructor()) | |||
18419 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
18420 | if (isa<CXXDestructorDecl>(Func)) | |||
18421 | OdrUse = OdrUseContext::FormallyOdrUsed; | |||
18422 | } | |||
18423 | ||||
18424 | // C++20 [expr.const]p12: | |||
18425 | // A function [...] is needed for constant evaluation if it is [...] a | |||
18426 | // constexpr function that is named by an expression that is potentially | |||
18427 | // constant evaluated | |||
18428 | bool NeededForConstantEvaluation = | |||
18429 | isPotentiallyConstantEvaluatedContext(*this) && | |||
18430 | isImplicitlyDefinableConstexprFunction(Func); | |||
18431 | ||||
18432 | // Determine whether we require a function definition to exist, per | |||
18433 | // C++11 [temp.inst]p3: | |||
18434 | // Unless a function template specialization has been explicitly | |||
18435 | // instantiated or explicitly specialized, the function template | |||
18436 | // specialization is implicitly instantiated when the specialization is | |||
18437 | // referenced in a context that requires a function definition to exist. | |||
18438 | // C++20 [temp.inst]p7: | |||
18439 | // The existence of a definition of a [...] function is considered to | |||
18440 | // affect the semantics of the program if the [...] function is needed for | |||
18441 | // constant evaluation by an expression | |||
18442 | // C++20 [basic.def.odr]p10: | |||
18443 | // Every program shall contain exactly one definition of every non-inline | |||
18444 | // function or variable that is odr-used in that program outside of a | |||
18445 | // discarded statement | |||
18446 | // C++20 [special]p1: | |||
18447 | // The implementation will implicitly define [defaulted special members] | |||
18448 | // if they are odr-used or needed for constant evaluation. | |||
18449 | // | |||
18450 | // Note that we skip the implicit instantiation of templates that are only | |||
18451 | // used in unused default arguments or by recursive calls to themselves. | |||
18452 | // This is formally non-conforming, but seems reasonable in practice. | |||
18453 | bool NeedDefinition = !IsRecursiveCall && (OdrUse == OdrUseContext::Used || | |||
18454 | NeededForConstantEvaluation); | |||
18455 | ||||
18456 | // C++14 [temp.expl.spec]p6: | |||
18457 | // If a template [...] is explicitly specialized then that specialization | |||
18458 | // shall be declared before the first use of that specialization that would | |||
18459 | // cause an implicit instantiation to take place, in every translation unit | |||
18460 | // in which such a use occurs | |||
18461 | if (NeedDefinition && | |||
18462 | (Func->getTemplateSpecializationKind() != TSK_Undeclared || | |||
18463 | Func->getMemberSpecializationInfo())) | |||
18464 | checkSpecializationReachability(Loc, Func); | |||
18465 | ||||
18466 | if (getLangOpts().CUDA) | |||
18467 | CheckCUDACall(Loc, Func); | |||
18468 | ||||
18469 | // If we need a definition, try to create one. | |||
18470 | if (NeedDefinition && !Func->getBody()) { | |||
18471 | runWithSufficientStackSpace(Loc, [&] { | |||
18472 | if (CXXConstructorDecl *Constructor = | |||
18473 | dyn_cast<CXXConstructorDecl>(Func)) { | |||
18474 | Constructor = cast<CXXConstructorDecl>(Constructor->getFirstDecl()); | |||
18475 | if (Constructor->isDefaulted() && !Constructor->isDeleted()) { | |||
18476 | if (Constructor->isDefaultConstructor()) { | |||
18477 | if (Constructor->isTrivial() && | |||
18478 | !Constructor->hasAttr<DLLExportAttr>()) | |||
18479 | return; | |||
18480 | DefineImplicitDefaultConstructor(Loc, Constructor); | |||
18481 | } else if (Constructor->isCopyConstructor()) { | |||
18482 | DefineImplicitCopyConstructor(Loc, Constructor); | |||
18483 | } else if (Constructor->isMoveConstructor()) { | |||
18484 | DefineImplicitMoveConstructor(Loc, Constructor); | |||
18485 | } | |||
18486 | } else if (Constructor->getInheritedConstructor()) { | |||
18487 | DefineInheritingConstructor(Loc, Constructor); | |||
18488 | } | |||
18489 | } else if (CXXDestructorDecl *Destructor = | |||
18490 | dyn_cast<CXXDestructorDecl>(Func)) { | |||
18491 | Destructor = cast<CXXDestructorDecl>(Destructor->getFirstDecl()); | |||
18492 | if (Destructor->isDefaulted() && !Destructor->isDeleted()) { | |||
18493 | if (Destructor->isTrivial() && !Destructor->hasAttr<DLLExportAttr>()) | |||
18494 | return; | |||
18495 | DefineImplicitDestructor(Loc, Destructor); | |||
18496 | } | |||
18497 | if (Destructor->isVirtual() && getLangOpts().AppleKext) | |||
18498 | MarkVTableUsed(Loc, Destructor->getParent()); | |||
18499 | } else if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(Func)) { | |||
18500 | if (MethodDecl->isOverloadedOperator() && | |||
18501 | MethodDecl->getOverloadedOperator() == OO_Equal) { | |||
18502 | MethodDecl = cast<CXXMethodDecl>(MethodDecl->getFirstDecl()); | |||
18503 | if (MethodDecl->isDefaulted() && !MethodDecl->isDeleted()) { | |||
18504 | if (MethodDecl->isCopyAssignmentOperator()) | |||
18505 | DefineImplicitCopyAssignment(Loc, MethodDecl); | |||
18506 | else if (MethodDecl->isMoveAssignmentOperator()) | |||
18507 | DefineImplicitMoveAssignment(Loc, MethodDecl); | |||
18508 | } | |||
18509 | } else if (isa<CXXConversionDecl>(MethodDecl) && | |||
18510 | MethodDecl->getParent()->isLambda()) { | |||
18511 | CXXConversionDecl *Conversion = | |||
18512 | cast<CXXConversionDecl>(MethodDecl->getFirstDecl()); | |||
18513 | if (Conversion->isLambdaToBlockPointerConversion()) | |||
18514 | DefineImplicitLambdaToBlockPointerConversion(Loc, Conversion); | |||
18515 | else | |||
18516 | DefineImplicitLambdaToFunctionPointerConversion(Loc, Conversion); | |||
18517 | } else if (MethodDecl->isVirtual() && getLangOpts().AppleKext) | |||
18518 | MarkVTableUsed(Loc, MethodDecl->getParent()); | |||
18519 | } | |||
18520 | ||||
18521 | if (Func->isDefaulted() && !Func->isDeleted()) { | |||
18522 | DefaultedComparisonKind DCK = getDefaultedComparisonKind(Func); | |||
18523 | if (DCK != DefaultedComparisonKind::None) | |||
18524 | DefineDefaultedComparison(Loc, Func, DCK); | |||
18525 | } | |||
18526 | ||||
18527 | // Implicit instantiation of function templates and member functions of | |||
18528 | // class templates. | |||
18529 | if (Func->isImplicitlyInstantiable()) { | |||
18530 | TemplateSpecializationKind TSK = | |||
18531 | Func->getTemplateSpecializationKindForInstantiation(); | |||
18532 | SourceLocation PointOfInstantiation = Func->getPointOfInstantiation(); | |||
18533 | bool FirstInstantiation = PointOfInstantiation.isInvalid(); | |||
18534 | if (FirstInstantiation) { | |||
18535 | PointOfInstantiation = Loc; | |||
18536 | if (auto *MSI = Func->getMemberSpecializationInfo()) | |||
18537 | MSI->setPointOfInstantiation(Loc); | |||
18538 | // FIXME: Notify listener. | |||
18539 | else | |||
18540 | Func->setTemplateSpecializationKind(TSK, PointOfInstantiation); | |||
18541 | } else if (TSK != TSK_ImplicitInstantiation) { | |||
18542 | // Use the point of use as the point of instantiation, instead of the | |||
18543 | // point of explicit instantiation (which we track as the actual point | |||
18544 | // of instantiation). This gives better backtraces in diagnostics. | |||
18545 | PointOfInstantiation = Loc; | |||
18546 | } | |||
18547 | ||||
18548 | if (FirstInstantiation || TSK != TSK_ImplicitInstantiation || | |||
18549 | Func->isConstexpr()) { | |||
18550 | if (isa<CXXRecordDecl>(Func->getDeclContext()) && | |||
18551 | cast<CXXRecordDecl>(Func->getDeclContext())->isLocalClass() && | |||
18552 | CodeSynthesisContexts.size()) | |||
18553 | PendingLocalImplicitInstantiations.push_back( | |||
18554 | std::make_pair(Func, PointOfInstantiation)); | |||
18555 | else if (Func->isConstexpr()) | |||
18556 | // Do not defer instantiations of constexpr functions, to avoid the | |||
18557 | // expression evaluator needing to call back into Sema if it sees a | |||
18558 | // call to such a function. | |||
18559 | InstantiateFunctionDefinition(PointOfInstantiation, Func); | |||
18560 | else { | |||
18561 | Func->setInstantiationIsPending(true); | |||
18562 | PendingInstantiations.push_back( | |||
18563 | std::make_pair(Func, PointOfInstantiation)); | |||
18564 | // Notify the consumer that a function was implicitly instantiated. | |||
18565 | Consumer.HandleCXXImplicitFunctionInstantiation(Func); | |||
18566 | } | |||
18567 | } | |||
18568 | } else { | |||
18569 | // Walk redefinitions, as some of them may be instantiable. | |||
18570 | for (auto *i : Func->redecls()) { | |||
18571 | if (!i->isUsed(false) && i->isImplicitlyInstantiable()) | |||
18572 | MarkFunctionReferenced(Loc, i, MightBeOdrUse); | |||
18573 | } | |||
18574 | } | |||
18575 | }); | |||
18576 | } | |||
18577 | ||||
18578 | // If a constructor was defined in the context of a default parameter | |||
18579 | // or of another default member initializer (ie a PotentiallyEvaluatedIfUsed | |||
18580 | // context), its initializers may not be referenced yet. | |||
18581 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Func)) { | |||
18582 | for (CXXCtorInitializer *Init : Constructor->inits()) { | |||
18583 | if (Init->isInClassMemberInitializer()) | |||
18584 | runWithSufficientStackSpace(Init->getSourceLocation(), [&]() { | |||
18585 | MarkDeclarationsReferencedInExpr(Init->getInit()); | |||
18586 | }); | |||
18587 | } | |||
18588 | } | |||
18589 | ||||
18590 | // C++14 [except.spec]p17: | |||
18591 | // An exception-specification is considered to be needed when: | |||
18592 | // - the function is odr-used or, if it appears in an unevaluated operand, | |||
18593 | // would be odr-used if the expression were potentially-evaluated; | |||
18594 | // | |||
18595 | // Note, we do this even if MightBeOdrUse is false. That indicates that the | |||
18596 | // function is a pure virtual function we're calling, and in that case the | |||
18597 | // function was selected by overload resolution and we need to resolve its | |||
18598 | // exception specification for a different reason. | |||
18599 | const FunctionProtoType *FPT = Func->getType()->getAs<FunctionProtoType>(); | |||
18600 | if (FPT && isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) | |||
18601 | ResolveExceptionSpec(Loc, FPT); | |||
18602 | ||||
18603 | // If this is the first "real" use, act on that. | |||
18604 | if (OdrUse == OdrUseContext::Used && !Func->isUsed(/*CheckUsedAttr=*/false)) { | |||
18605 | // Keep track of used but undefined functions. | |||
18606 | if (!Func->isDefined()) { | |||
18607 | if (mightHaveNonExternalLinkage(Func)) | |||
18608 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
18609 | else if (Func->getMostRecentDecl()->isInlined() && | |||
18610 | !LangOpts.GNUInline && | |||
18611 | !Func->getMostRecentDecl()->hasAttr<GNUInlineAttr>()) | |||
18612 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
18613 | else if (isExternalWithNoLinkageType(Func)) | |||
18614 | UndefinedButUsed.insert(std::make_pair(Func->getCanonicalDecl(), Loc)); | |||
18615 | } | |||
18616 | ||||
18617 | // Some x86 Windows calling conventions mangle the size of the parameter | |||
18618 | // pack into the name. Computing the size of the parameters requires the | |||
18619 | // parameter types to be complete. Check that now. | |||
18620 | if (funcHasParameterSizeMangling(*this, Func)) | |||
18621 | CheckCompleteParameterTypesForMangler(*this, Func, Loc); | |||
18622 | ||||
18623 | // In the MS C++ ABI, the compiler emits destructor variants where they are | |||
18624 | // used. If the destructor is used here but defined elsewhere, mark the | |||
18625 | // virtual base destructors referenced. If those virtual base destructors | |||
18626 | // are inline, this will ensure they are defined when emitting the complete | |||
18627 | // destructor variant. This checking may be redundant if the destructor is | |||
18628 | // provided later in this TU. | |||
18629 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
18630 | if (auto *Dtor = dyn_cast<CXXDestructorDecl>(Func)) { | |||
18631 | CXXRecordDecl *Parent = Dtor->getParent(); | |||
18632 | if (Parent->getNumVBases() > 0 && !Dtor->getBody()) | |||
18633 | CheckCompleteDestructorVariant(Loc, Dtor); | |||
18634 | } | |||
18635 | } | |||
18636 | ||||
18637 | Func->markUsed(Context); | |||
18638 | } | |||
18639 | } | |||
18640 | ||||
18641 | /// Directly mark a variable odr-used. Given a choice, prefer to use | |||
18642 | /// MarkVariableReferenced since it does additional checks and then | |||
18643 | /// calls MarkVarDeclODRUsed. | |||
18644 | /// If the variable must be captured: | |||
18645 | /// - if FunctionScopeIndexToStopAt is null, capture it in the CurContext | |||
18646 | /// - else capture it in the DeclContext that maps to the | |||
18647 | /// *FunctionScopeIndexToStopAt on the FunctionScopeInfo stack. | |||
18648 | static void | |||
18649 | MarkVarDeclODRUsed(ValueDecl *V, SourceLocation Loc, Sema &SemaRef, | |||
18650 | const unsigned *const FunctionScopeIndexToStopAt = nullptr) { | |||
18651 | // Keep track of used but undefined variables. | |||
18652 | // FIXME: We shouldn't suppress this warning for static data members. | |||
18653 | VarDecl *Var = V->getPotentiallyDecomposedVarDecl(); | |||
18654 | assert(Var && "expected a capturable variable")(static_cast <bool> (Var && "expected a capturable variable" ) ? void (0) : __assert_fail ("Var && \"expected a capturable variable\"" , "clang/lib/Sema/SemaExpr.cpp", 18654, __extension__ __PRETTY_FUNCTION__ )); | |||
18655 | ||||
18656 | if (Var->hasDefinition(SemaRef.Context) == VarDecl::DeclarationOnly && | |||
18657 | (!Var->isExternallyVisible() || Var->isInline() || | |||
18658 | SemaRef.isExternalWithNoLinkageType(Var)) && | |||
18659 | !(Var->isStaticDataMember() && Var->hasInit())) { | |||
18660 | SourceLocation &old = SemaRef.UndefinedButUsed[Var->getCanonicalDecl()]; | |||
18661 | if (old.isInvalid()) | |||
18662 | old = Loc; | |||
18663 | } | |||
18664 | QualType CaptureType, DeclRefType; | |||
18665 | if (SemaRef.LangOpts.OpenMP) | |||
18666 | SemaRef.tryCaptureOpenMPLambdas(V); | |||
18667 | SemaRef.tryCaptureVariable(V, Loc, Sema::TryCapture_Implicit, | |||
18668 | /*EllipsisLoc*/ SourceLocation(), | |||
18669 | /*BuildAndDiagnose*/ true, CaptureType, | |||
18670 | DeclRefType, FunctionScopeIndexToStopAt); | |||
18671 | ||||
18672 | if (SemaRef.LangOpts.CUDA && Var->hasGlobalStorage()) { | |||
18673 | auto *FD = dyn_cast_or_null<FunctionDecl>(SemaRef.CurContext); | |||
18674 | auto VarTarget = SemaRef.IdentifyCUDATarget(Var); | |||
18675 | auto UserTarget = SemaRef.IdentifyCUDATarget(FD); | |||
18676 | if (VarTarget == Sema::CVT_Host && | |||
18677 | (UserTarget == Sema::CFT_Device || UserTarget == Sema::CFT_HostDevice || | |||
18678 | UserTarget == Sema::CFT_Global)) { | |||
18679 | // Diagnose ODR-use of host global variables in device functions. | |||
18680 | // Reference of device global variables in host functions is allowed | |||
18681 | // through shadow variables therefore it is not diagnosed. | |||
18682 | if (SemaRef.LangOpts.CUDAIsDevice) { | |||
18683 | SemaRef.targetDiag(Loc, diag::err_ref_bad_target) | |||
18684 | << /*host*/ 2 << /*variable*/ 1 << Var << UserTarget; | |||
18685 | SemaRef.targetDiag(Var->getLocation(), | |||
18686 | Var->getType().isConstQualified() | |||
18687 | ? diag::note_cuda_const_var_unpromoted | |||
18688 | : diag::note_cuda_host_var); | |||
18689 | } | |||
18690 | } else if (VarTarget == Sema::CVT_Device && | |||
18691 | (UserTarget == Sema::CFT_Host || | |||
18692 | UserTarget == Sema::CFT_HostDevice)) { | |||
18693 | // Record a CUDA/HIP device side variable if it is ODR-used | |||
18694 | // by host code. This is done conservatively, when the variable is | |||
18695 | // referenced in any of the following contexts: | |||
18696 | // - a non-function context | |||
18697 | // - a host function | |||
18698 | // - a host device function | |||
18699 | // This makes the ODR-use of the device side variable by host code to | |||
18700 | // be visible in the device compilation for the compiler to be able to | |||
18701 | // emit template variables instantiated by host code only and to | |||
18702 | // externalize the static device side variable ODR-used by host code. | |||
18703 | if (!Var->hasExternalStorage()) | |||
18704 | SemaRef.getASTContext().CUDADeviceVarODRUsedByHost.insert(Var); | |||
18705 | else if (SemaRef.LangOpts.GPURelocatableDeviceCode) | |||
18706 | SemaRef.getASTContext().CUDAExternalDeviceDeclODRUsedByHost.insert(Var); | |||
18707 | } | |||
18708 | } | |||
18709 | ||||
18710 | V->markUsed(SemaRef.Context); | |||
18711 | } | |||
18712 | ||||
18713 | void Sema::MarkCaptureUsedInEnclosingContext(ValueDecl *Capture, | |||
18714 | SourceLocation Loc, | |||
18715 | unsigned CapturingScopeIndex) { | |||
18716 | MarkVarDeclODRUsed(Capture, Loc, *this, &CapturingScopeIndex); | |||
18717 | } | |||
18718 | ||||
18719 | void diagnoseUncapturableValueReferenceOrBinding(Sema &S, SourceLocation loc, | |||
18720 | ValueDecl *var) { | |||
18721 | DeclContext *VarDC = var->getDeclContext(); | |||
18722 | ||||
18723 | // If the parameter still belongs to the translation unit, then | |||
18724 | // we're actually just using one parameter in the declaration of | |||
18725 | // the next. | |||
18726 | if (isa<ParmVarDecl>(var) && | |||
18727 | isa<TranslationUnitDecl>(VarDC)) | |||
18728 | return; | |||
18729 | ||||
18730 | // For C code, don't diagnose about capture if we're not actually in code | |||
18731 | // right now; it's impossible to write a non-constant expression outside of | |||
18732 | // function context, so we'll get other (more useful) diagnostics later. | |||
18733 | // | |||
18734 | // For C++, things get a bit more nasty... it would be nice to suppress this | |||
18735 | // diagnostic for certain cases like using a local variable in an array bound | |||
18736 | // for a member of a local class, but the correct predicate is not obvious. | |||
18737 | if (!S.getLangOpts().CPlusPlus && !S.CurContext->isFunctionOrMethod()) | |||
18738 | return; | |||
18739 | ||||
18740 | unsigned ValueKind = isa<BindingDecl>(var) ? 1 : 0; | |||
18741 | unsigned ContextKind = 3; // unknown | |||
18742 | if (isa<CXXMethodDecl>(VarDC) && | |||
18743 | cast<CXXRecordDecl>(VarDC->getParent())->isLambda()) { | |||
18744 | ContextKind = 2; | |||
18745 | } else if (isa<FunctionDecl>(VarDC)) { | |||
18746 | ContextKind = 0; | |||
18747 | } else if (isa<BlockDecl>(VarDC)) { | |||
18748 | ContextKind = 1; | |||
18749 | } | |||
18750 | ||||
18751 | S.Diag(loc, diag::err_reference_to_local_in_enclosing_context) | |||
18752 | << var << ValueKind << ContextKind << VarDC; | |||
18753 | S.Diag(var->getLocation(), diag::note_entity_declared_at) | |||
18754 | << var; | |||
18755 | ||||
18756 | // FIXME: Add additional diagnostic info about class etc. which prevents | |||
18757 | // capture. | |||
18758 | } | |||
18759 | ||||
18760 | static bool isVariableAlreadyCapturedInScopeInfo(CapturingScopeInfo *CSI, | |||
18761 | ValueDecl *Var, | |||
18762 | bool &SubCapturesAreNested, | |||
18763 | QualType &CaptureType, | |||
18764 | QualType &DeclRefType) { | |||
18765 | // Check whether we've already captured it. | |||
18766 | if (CSI->CaptureMap.count(Var)) { | |||
18767 | // If we found a capture, any subcaptures are nested. | |||
18768 | SubCapturesAreNested = true; | |||
18769 | ||||
18770 | // Retrieve the capture type for this variable. | |||
18771 | CaptureType = CSI->getCapture(Var).getCaptureType(); | |||
18772 | ||||
18773 | // Compute the type of an expression that refers to this variable. | |||
18774 | DeclRefType = CaptureType.getNonReferenceType(); | |||
18775 | ||||
18776 | // Similarly to mutable captures in lambda, all the OpenMP captures by copy | |||
18777 | // are mutable in the sense that user can change their value - they are | |||
18778 | // private instances of the captured declarations. | |||
18779 | const Capture &Cap = CSI->getCapture(Var); | |||
18780 | if (Cap.isCopyCapture() && | |||
18781 | !(isa<LambdaScopeInfo>(CSI) && cast<LambdaScopeInfo>(CSI)->Mutable) && | |||
18782 | !(isa<CapturedRegionScopeInfo>(CSI) && | |||
18783 | cast<CapturedRegionScopeInfo>(CSI)->CapRegionKind == CR_OpenMP)) | |||
18784 | DeclRefType.addConst(); | |||
18785 | return true; | |||
18786 | } | |||
18787 | return false; | |||
18788 | } | |||
18789 | ||||
18790 | // Only block literals, captured statements, and lambda expressions can | |||
18791 | // capture; other scopes don't work. | |||
18792 | static DeclContext *getParentOfCapturingContextOrNull(DeclContext *DC, | |||
18793 | ValueDecl *Var, | |||
18794 | SourceLocation Loc, | |||
18795 | const bool Diagnose, | |||
18796 | Sema &S) { | |||
18797 | if (isa<BlockDecl>(DC) || isa<CapturedDecl>(DC) || isLambdaCallOperator(DC)) | |||
18798 | return getLambdaAwareParentOfDeclContext(DC); | |||
18799 | ||||
18800 | VarDecl *Underlying = Var->getPotentiallyDecomposedVarDecl(); | |||
18801 | if (Underlying) { | |||
18802 | if (Underlying->hasLocalStorage() && Diagnose) | |||
18803 | diagnoseUncapturableValueReferenceOrBinding(S, Loc, Var); | |||
18804 | } | |||
18805 | return nullptr; | |||
18806 | } | |||
18807 | ||||
18808 | // Certain capturing entities (lambdas, blocks etc.) are not allowed to capture | |||
18809 | // certain types of variables (unnamed, variably modified types etc.) | |||
18810 | // so check for eligibility. | |||
18811 | static bool isVariableCapturable(CapturingScopeInfo *CSI, ValueDecl *Var, | |||
18812 | SourceLocation Loc, const bool Diagnose, | |||
18813 | Sema &S) { | |||
18814 | ||||
18815 | assert((isa<VarDecl, BindingDecl>(Var)) &&(static_cast <bool> ((isa<VarDecl, BindingDecl>(Var )) && "Only variables and structured bindings can be captured" ) ? void (0) : __assert_fail ("(isa<VarDecl, BindingDecl>(Var)) && \"Only variables and structured bindings can be captured\"" , "clang/lib/Sema/SemaExpr.cpp", 18816, __extension__ __PRETTY_FUNCTION__ )) | |||
18816 | "Only variables and structured bindings can be captured")(static_cast <bool> ((isa<VarDecl, BindingDecl>(Var )) && "Only variables and structured bindings can be captured" ) ? void (0) : __assert_fail ("(isa<VarDecl, BindingDecl>(Var)) && \"Only variables and structured bindings can be captured\"" , "clang/lib/Sema/SemaExpr.cpp", 18816, __extension__ __PRETTY_FUNCTION__ )); | |||
18817 | ||||
18818 | bool IsBlock = isa<BlockScopeInfo>(CSI); | |||
18819 | bool IsLambda = isa<LambdaScopeInfo>(CSI); | |||
18820 | ||||
18821 | // Lambdas are not allowed to capture unnamed variables | |||
18822 | // (e.g. anonymous unions). | |||
18823 | // FIXME: The C++11 rule don't actually state this explicitly, but I'm | |||
18824 | // assuming that's the intent. | |||
18825 | if (IsLambda && !Var->getDeclName()) { | |||
18826 | if (Diagnose) { | |||
18827 | S.Diag(Loc, diag::err_lambda_capture_anonymous_var); | |||
18828 | S.Diag(Var->getLocation(), diag::note_declared_at); | |||
18829 | } | |||
18830 | return false; | |||
18831 | } | |||
18832 | ||||
18833 | // Prohibit variably-modified types in blocks; they're difficult to deal with. | |||
18834 | if (Var->getType()->isVariablyModifiedType() && IsBlock) { | |||
18835 | if (Diagnose) { | |||
18836 | S.Diag(Loc, diag::err_ref_vm_type); | |||
18837 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18838 | } | |||
18839 | return false; | |||
18840 | } | |||
18841 | // Prohibit structs with flexible array members too. | |||
18842 | // We cannot capture what is in the tail end of the struct. | |||
18843 | if (const RecordType *VTTy = Var->getType()->getAs<RecordType>()) { | |||
18844 | if (VTTy->getDecl()->hasFlexibleArrayMember()) { | |||
18845 | if (Diagnose) { | |||
18846 | if (IsBlock) | |||
18847 | S.Diag(Loc, diag::err_ref_flexarray_type); | |||
18848 | else | |||
18849 | S.Diag(Loc, diag::err_lambda_capture_flexarray_type) << Var; | |||
18850 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18851 | } | |||
18852 | return false; | |||
18853 | } | |||
18854 | } | |||
18855 | const bool HasBlocksAttr = Var->hasAttr<BlocksAttr>(); | |||
18856 | // Lambdas and captured statements are not allowed to capture __block | |||
18857 | // variables; they don't support the expected semantics. | |||
18858 | if (HasBlocksAttr && (IsLambda || isa<CapturedRegionScopeInfo>(CSI))) { | |||
18859 | if (Diagnose) { | |||
18860 | S.Diag(Loc, diag::err_capture_block_variable) << Var << !IsLambda; | |||
18861 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18862 | } | |||
18863 | return false; | |||
18864 | } | |||
18865 | // OpenCL v2.0 s6.12.5: Blocks cannot reference/capture other blocks | |||
18866 | if (S.getLangOpts().OpenCL && IsBlock && | |||
18867 | Var->getType()->isBlockPointerType()) { | |||
18868 | if (Diagnose) | |||
18869 | S.Diag(Loc, diag::err_opencl_block_ref_block); | |||
18870 | return false; | |||
18871 | } | |||
18872 | ||||
18873 | if (isa<BindingDecl>(Var)) { | |||
18874 | if (!IsLambda || !S.getLangOpts().CPlusPlus) { | |||
18875 | if (Diagnose) | |||
18876 | diagnoseUncapturableValueReferenceOrBinding(S, Loc, Var); | |||
18877 | return false; | |||
18878 | } else if (Diagnose && S.getLangOpts().CPlusPlus) { | |||
18879 | S.Diag(Loc, S.LangOpts.CPlusPlus20 | |||
18880 | ? diag::warn_cxx17_compat_capture_binding | |||
18881 | : diag::ext_capture_binding) | |||
18882 | << Var; | |||
18883 | S.Diag(Var->getLocation(), diag::note_entity_declared_at) << Var; | |||
18884 | } | |||
18885 | } | |||
18886 | ||||
18887 | return true; | |||
18888 | } | |||
18889 | ||||
18890 | // Returns true if the capture by block was successful. | |||
18891 | static bool captureInBlock(BlockScopeInfo *BSI, ValueDecl *Var, | |||
18892 | SourceLocation Loc, const bool BuildAndDiagnose, | |||
18893 | QualType &CaptureType, QualType &DeclRefType, | |||
18894 | const bool Nested, Sema &S, bool Invalid) { | |||
18895 | bool ByRef = false; | |||
18896 | ||||
18897 | // Blocks are not allowed to capture arrays, excepting OpenCL. | |||
18898 | // OpenCL v2.0 s1.12.5 (revision 40): arrays are captured by reference | |||
18899 | // (decayed to pointers). | |||
18900 | if (!Invalid && !S.getLangOpts().OpenCL && CaptureType->isArrayType()) { | |||
18901 | if (BuildAndDiagnose) { | |||
18902 | S.Diag(Loc, diag::err_ref_array_type); | |||
18903 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18904 | Invalid = true; | |||
18905 | } else { | |||
18906 | return false; | |||
18907 | } | |||
18908 | } | |||
18909 | ||||
18910 | // Forbid the block-capture of autoreleasing variables. | |||
18911 | if (!Invalid && | |||
18912 | CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) { | |||
18913 | if (BuildAndDiagnose) { | |||
18914 | S.Diag(Loc, diag::err_arc_autoreleasing_capture) | |||
18915 | << /*block*/ 0; | |||
18916 | S.Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
18917 | Invalid = true; | |||
18918 | } else { | |||
18919 | return false; | |||
18920 | } | |||
18921 | } | |||
18922 | ||||
18923 | // Warn about implicitly autoreleasing indirect parameters captured by blocks. | |||
18924 | if (const auto *PT = CaptureType->getAs<PointerType>()) { | |||
18925 | QualType PointeeTy = PT->getPointeeType(); | |||
18926 | ||||
18927 | if (!Invalid && PointeeTy->getAs<ObjCObjectPointerType>() && | |||
18928 | PointeeTy.getObjCLifetime() == Qualifiers::OCL_Autoreleasing && | |||
18929 | !S.Context.hasDirectOwnershipQualifier(PointeeTy)) { | |||
18930 | if (BuildAndDiagnose) { | |||
18931 | SourceLocation VarLoc = Var->getLocation(); | |||
18932 | S.Diag(Loc, diag::warn_block_capture_autoreleasing); | |||
18933 | S.Diag(VarLoc, diag::note_declare_parameter_strong); | |||
18934 | } | |||
18935 | } | |||
18936 | } | |||
18937 | ||||
18938 | const bool HasBlocksAttr = Var->hasAttr<BlocksAttr>(); | |||
18939 | if (HasBlocksAttr || CaptureType->isReferenceType() || | |||
18940 | (S.getLangOpts().OpenMP && S.isOpenMPCapturedDecl(Var))) { | |||
18941 | // Block capture by reference does not change the capture or | |||
18942 | // declaration reference types. | |||
18943 | ByRef = true; | |||
18944 | } else { | |||
18945 | // Block capture by copy introduces 'const'. | |||
18946 | CaptureType = CaptureType.getNonReferenceType().withConst(); | |||
18947 | DeclRefType = CaptureType; | |||
18948 | } | |||
18949 | ||||
18950 | // Actually capture the variable. | |||
18951 | if (BuildAndDiagnose) | |||
18952 | BSI->addCapture(Var, HasBlocksAttr, ByRef, Nested, Loc, SourceLocation(), | |||
18953 | CaptureType, Invalid); | |||
18954 | ||||
18955 | return !Invalid; | |||
18956 | } | |||
18957 | ||||
18958 | /// Capture the given variable in the captured region. | |||
18959 | static bool captureInCapturedRegion( | |||
18960 | CapturedRegionScopeInfo *RSI, ValueDecl *Var, SourceLocation Loc, | |||
18961 | const bool BuildAndDiagnose, QualType &CaptureType, QualType &DeclRefType, | |||
18962 | const bool RefersToCapturedVariable, Sema::TryCaptureKind Kind, | |||
18963 | bool IsTopScope, Sema &S, bool Invalid) { | |||
18964 | // By default, capture variables by reference. | |||
18965 | bool ByRef = true; | |||
18966 | if (IsTopScope && Kind != Sema::TryCapture_Implicit) { | |||
18967 | ByRef = (Kind == Sema::TryCapture_ExplicitByRef); | |||
18968 | } else if (S.getLangOpts().OpenMP && RSI->CapRegionKind == CR_OpenMP) { | |||
18969 | // Using an LValue reference type is consistent with Lambdas (see below). | |||
18970 | if (S.isOpenMPCapturedDecl(Var)) { | |||
18971 | bool HasConst = DeclRefType.isConstQualified(); | |||
18972 | DeclRefType = DeclRefType.getUnqualifiedType(); | |||
18973 | // Don't lose diagnostics about assignments to const. | |||
18974 | if (HasConst) | |||
18975 | DeclRefType.addConst(); | |||
18976 | } | |||
18977 | // Do not capture firstprivates in tasks. | |||
18978 | if (S.isOpenMPPrivateDecl(Var, RSI->OpenMPLevel, RSI->OpenMPCaptureLevel) != | |||
18979 | OMPC_unknown) | |||
18980 | return true; | |||
18981 | ByRef = S.isOpenMPCapturedByRef(Var, RSI->OpenMPLevel, | |||
18982 | RSI->OpenMPCaptureLevel); | |||
18983 | } | |||
18984 | ||||
18985 | if (ByRef) | |||
18986 | CaptureType = S.Context.getLValueReferenceType(DeclRefType); | |||
18987 | else | |||
18988 | CaptureType = DeclRefType; | |||
18989 | ||||
18990 | // Actually capture the variable. | |||
18991 | if (BuildAndDiagnose) | |||
18992 | RSI->addCapture(Var, /*isBlock*/ false, ByRef, RefersToCapturedVariable, | |||
18993 | Loc, SourceLocation(), CaptureType, Invalid); | |||
18994 | ||||
18995 | return !Invalid; | |||
18996 | } | |||
18997 | ||||
18998 | /// Capture the given variable in the lambda. | |||
18999 | static bool captureInLambda(LambdaScopeInfo *LSI, ValueDecl *Var, | |||
19000 | SourceLocation Loc, const bool BuildAndDiagnose, | |||
19001 | QualType &CaptureType, QualType &DeclRefType, | |||
19002 | const bool RefersToCapturedVariable, | |||
19003 | const Sema::TryCaptureKind Kind, | |||
19004 | SourceLocation EllipsisLoc, const bool IsTopScope, | |||
19005 | Sema &S, bool Invalid) { | |||
19006 | // Determine whether we are capturing by reference or by value. | |||
19007 | bool ByRef = false; | |||
19008 | if (IsTopScope && Kind != Sema::TryCapture_Implicit) { | |||
19009 | ByRef = (Kind == Sema::TryCapture_ExplicitByRef); | |||
19010 | } else { | |||
19011 | ByRef = (LSI->ImpCaptureStyle == LambdaScopeInfo::ImpCap_LambdaByref); | |||
19012 | } | |||
19013 | ||||
19014 | BindingDecl *BD = dyn_cast<BindingDecl>(Var); | |||
19015 | // FIXME: We should support capturing structured bindings in OpenMP. | |||
19016 | if (!Invalid && BD && S.LangOpts.OpenMP) { | |||
19017 | if (BuildAndDiagnose) { | |||
19018 | S.Diag(Loc, diag::err_capture_binding_openmp) << Var; | |||
19019 | S.Diag(Var->getLocation(), diag::note_entity_declared_at) << Var; | |||
19020 | } | |||
19021 | Invalid = true; | |||
19022 | } | |||
19023 | ||||
19024 | if (BuildAndDiagnose && S.Context.getTargetInfo().getTriple().isWasm() && | |||
19025 | CaptureType.getNonReferenceType()->isWebAssemblyReferenceType()) { | |||
19026 | S.Diag(Loc, diag::err_wasm_ca_reference) << 0; | |||
19027 | Invalid = true; | |||
19028 | } | |||
19029 | ||||
19030 | // Compute the type of the field that will capture this variable. | |||
19031 | if (ByRef) { | |||
19032 | // C++11 [expr.prim.lambda]p15: | |||
19033 | // An entity is captured by reference if it is implicitly or | |||
19034 | // explicitly captured but not captured by copy. It is | |||
19035 | // unspecified whether additional unnamed non-static data | |||
19036 | // members are declared in the closure type for entities | |||
19037 | // captured by reference. | |||
19038 | // | |||
19039 | // FIXME: It is not clear whether we want to build an lvalue reference | |||
19040 | // to the DeclRefType or to CaptureType.getNonReferenceType(). GCC appears | |||
19041 | // to do the former, while EDG does the latter. Core issue 1249 will | |||
19042 | // clarify, but for now we follow GCC because it's a more permissive and | |||
19043 | // easily defensible position. | |||
19044 | CaptureType = S.Context.getLValueReferenceType(DeclRefType); | |||
19045 | } else { | |||
19046 | // C++11 [expr.prim.lambda]p14: | |||
19047 | // For each entity captured by copy, an unnamed non-static | |||
19048 | // data member is declared in the closure type. The | |||
19049 | // declaration order of these members is unspecified. The type | |||
19050 | // of such a data member is the type of the corresponding | |||
19051 | // captured entity if the entity is not a reference to an | |||
19052 | // object, or the referenced type otherwise. [Note: If the | |||
19053 | // captured entity is a reference to a function, the | |||
19054 | // corresponding data member is also a reference to a | |||
19055 | // function. - end note ] | |||
19056 | if (const ReferenceType *RefType = CaptureType->getAs<ReferenceType>()){ | |||
19057 | if (!RefType->getPointeeType()->isFunctionType()) | |||
19058 | CaptureType = RefType->getPointeeType(); | |||
19059 | } | |||
19060 | ||||
19061 | // Forbid the lambda copy-capture of autoreleasing variables. | |||
19062 | if (!Invalid && | |||
19063 | CaptureType.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) { | |||
19064 | if (BuildAndDiagnose) { | |||
19065 | S.Diag(Loc, diag::err_arc_autoreleasing_capture) << /*lambda*/ 1; | |||
19066 | S.Diag(Var->getLocation(), diag::note_previous_decl) | |||
19067 | << Var->getDeclName(); | |||
19068 | Invalid = true; | |||
19069 | } else { | |||
19070 | return false; | |||
19071 | } | |||
19072 | } | |||
19073 | ||||
19074 | // Make sure that by-copy captures are of a complete and non-abstract type. | |||
19075 | if (!Invalid && BuildAndDiagnose) { | |||
19076 | if (!CaptureType->isDependentType() && | |||
19077 | S.RequireCompleteSizedType( | |||
19078 | Loc, CaptureType, | |||
19079 | diag::err_capture_of_incomplete_or_sizeless_type, | |||
19080 | Var->getDeclName())) | |||
19081 | Invalid = true; | |||
19082 | else if (S.RequireNonAbstractType(Loc, CaptureType, | |||
19083 | diag::err_capture_of_abstract_type)) | |||
19084 | Invalid = true; | |||
19085 | } | |||
19086 | } | |||
19087 | ||||
19088 | // Compute the type of a reference to this captured variable. | |||
19089 | if (ByRef) | |||
19090 | DeclRefType = CaptureType.getNonReferenceType(); | |||
19091 | else { | |||
19092 | // C++ [expr.prim.lambda]p5: | |||
19093 | // The closure type for a lambda-expression has a public inline | |||
19094 | // function call operator [...]. This function call operator is | |||
19095 | // declared const (9.3.1) if and only if the lambda-expression's | |||
19096 | // parameter-declaration-clause is not followed by mutable. | |||
19097 | DeclRefType = CaptureType.getNonReferenceType(); | |||
19098 | if (!LSI->Mutable && !CaptureType->isReferenceType()) | |||
19099 | DeclRefType.addConst(); | |||
19100 | } | |||
19101 | ||||
19102 | // Add the capture. | |||
19103 | if (BuildAndDiagnose) | |||
19104 | LSI->addCapture(Var, /*isBlock=*/false, ByRef, RefersToCapturedVariable, | |||
19105 | Loc, EllipsisLoc, CaptureType, Invalid); | |||
19106 | ||||
19107 | return !Invalid; | |||
19108 | } | |||
19109 | ||||
19110 | static bool canCaptureVariableByCopy(ValueDecl *Var, | |||
19111 | const ASTContext &Context) { | |||
19112 | // Offer a Copy fix even if the type is dependent. | |||
19113 | if (Var->getType()->isDependentType()) | |||
19114 | return true; | |||
19115 | QualType T = Var->getType().getNonReferenceType(); | |||
19116 | if (T.isTriviallyCopyableType(Context)) | |||
19117 | return true; | |||
19118 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) { | |||
19119 | ||||
19120 | if (!(RD = RD->getDefinition())) | |||
19121 | return false; | |||
19122 | if (RD->hasSimpleCopyConstructor()) | |||
19123 | return true; | |||
19124 | if (RD->hasUserDeclaredCopyConstructor()) | |||
19125 | for (CXXConstructorDecl *Ctor : RD->ctors()) | |||
19126 | if (Ctor->isCopyConstructor()) | |||
19127 | return !Ctor->isDeleted(); | |||
19128 | } | |||
19129 | return false; | |||
19130 | } | |||
19131 | ||||
19132 | /// Create up to 4 fix-its for explicit reference and value capture of \p Var or | |||
19133 | /// default capture. Fixes may be omitted if they aren't allowed by the | |||
19134 | /// standard, for example we can't emit a default copy capture fix-it if we | |||
19135 | /// already explicitly copy capture capture another variable. | |||
19136 | static void buildLambdaCaptureFixit(Sema &Sema, LambdaScopeInfo *LSI, | |||
19137 | ValueDecl *Var) { | |||
19138 | assert(LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None)(static_cast <bool> (LSI->ImpCaptureStyle == CapturingScopeInfo ::ImpCap_None) ? void (0) : __assert_fail ("LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None" , "clang/lib/Sema/SemaExpr.cpp", 19138, __extension__ __PRETTY_FUNCTION__ )); | |||
19139 | // Don't offer Capture by copy of default capture by copy fixes if Var is | |||
19140 | // known not to be copy constructible. | |||
19141 | bool ShouldOfferCopyFix = canCaptureVariableByCopy(Var, Sema.getASTContext()); | |||
19142 | ||||
19143 | SmallString<32> FixBuffer; | |||
19144 | StringRef Separator = LSI->NumExplicitCaptures > 0 ? ", " : ""; | |||
19145 | if (Var->getDeclName().isIdentifier() && !Var->getName().empty()) { | |||
19146 | SourceLocation VarInsertLoc = LSI->IntroducerRange.getEnd(); | |||
19147 | if (ShouldOfferCopyFix) { | |||
19148 | // Offer fixes to insert an explicit capture for the variable. | |||
19149 | // [] -> [VarName] | |||
19150 | // [OtherCapture] -> [OtherCapture, VarName] | |||
19151 | FixBuffer.assign({Separator, Var->getName()}); | |||
19152 | Sema.Diag(VarInsertLoc, diag::note_lambda_variable_capture_fixit) | |||
19153 | << Var << /*value*/ 0 | |||
19154 | << FixItHint::CreateInsertion(VarInsertLoc, FixBuffer); | |||
19155 | } | |||
19156 | // As above but capture by reference. | |||
19157 | FixBuffer.assign({Separator, "&", Var->getName()}); | |||
19158 | Sema.Diag(VarInsertLoc, diag::note_lambda_variable_capture_fixit) | |||
19159 | << Var << /*reference*/ 1 | |||
19160 | << FixItHint::CreateInsertion(VarInsertLoc, FixBuffer); | |||
19161 | } | |||
19162 | ||||
19163 | // Only try to offer default capture if there are no captures excluding this | |||
19164 | // and init captures. | |||
19165 | // [this]: OK. | |||
19166 | // [X = Y]: OK. | |||
19167 | // [&A, &B]: Don't offer. | |||
19168 | // [A, B]: Don't offer. | |||
19169 | if (llvm::any_of(LSI->Captures, [](Capture &C) { | |||
19170 | return !C.isThisCapture() && !C.isInitCapture(); | |||
19171 | })) | |||
19172 | return; | |||
19173 | ||||
19174 | // The default capture specifiers, '=' or '&', must appear first in the | |||
19175 | // capture body. | |||
19176 | SourceLocation DefaultInsertLoc = | |||
19177 | LSI->IntroducerRange.getBegin().getLocWithOffset(1); | |||
19178 | ||||
19179 | if (ShouldOfferCopyFix) { | |||
19180 | bool CanDefaultCopyCapture = true; | |||
19181 | // [=, *this] OK since c++17 | |||
19182 | // [=, this] OK since c++20 | |||
19183 | if (LSI->isCXXThisCaptured() && !Sema.getLangOpts().CPlusPlus20) | |||
19184 | CanDefaultCopyCapture = Sema.getLangOpts().CPlusPlus17 | |||
19185 | ? LSI->getCXXThisCapture().isCopyCapture() | |||
19186 | : false; | |||
19187 | // We can't use default capture by copy if any captures already specified | |||
19188 | // capture by copy. | |||
19189 | if (CanDefaultCopyCapture && llvm::none_of(LSI->Captures, [](Capture &C) { | |||
19190 | return !C.isThisCapture() && !C.isInitCapture() && C.isCopyCapture(); | |||
19191 | })) { | |||
19192 | FixBuffer.assign({"=", Separator}); | |||
19193 | Sema.Diag(DefaultInsertLoc, diag::note_lambda_default_capture_fixit) | |||
19194 | << /*value*/ 0 | |||
19195 | << FixItHint::CreateInsertion(DefaultInsertLoc, FixBuffer); | |||
19196 | } | |||
19197 | } | |||
19198 | ||||
19199 | // We can't use default capture by reference if any captures already specified | |||
19200 | // capture by reference. | |||
19201 | if (llvm::none_of(LSI->Captures, [](Capture &C) { | |||
19202 | return !C.isInitCapture() && C.isReferenceCapture() && | |||
19203 | !C.isThisCapture(); | |||
19204 | })) { | |||
19205 | FixBuffer.assign({"&", Separator}); | |||
19206 | Sema.Diag(DefaultInsertLoc, diag::note_lambda_default_capture_fixit) | |||
19207 | << /*reference*/ 1 | |||
19208 | << FixItHint::CreateInsertion(DefaultInsertLoc, FixBuffer); | |||
19209 | } | |||
19210 | } | |||
19211 | ||||
19212 | bool Sema::tryCaptureVariable( | |||
19213 | ValueDecl *Var, SourceLocation ExprLoc, TryCaptureKind Kind, | |||
19214 | SourceLocation EllipsisLoc, bool BuildAndDiagnose, QualType &CaptureType, | |||
19215 | QualType &DeclRefType, const unsigned *const FunctionScopeIndexToStopAt) { | |||
19216 | // An init-capture is notionally from the context surrounding its | |||
19217 | // declaration, but its parent DC is the lambda class. | |||
19218 | DeclContext *VarDC = Var->getDeclContext(); | |||
19219 | DeclContext *DC = CurContext; | |||
19220 | ||||
19221 | // tryCaptureVariable is called every time a DeclRef is formed, | |||
19222 | // it can therefore have non-negigible impact on performances. | |||
19223 | // For local variables and when there is no capturing scope, | |||
19224 | // we can bailout early. | |||
19225 | if (CapturingFunctionScopes == 0 && (!BuildAndDiagnose || VarDC == DC)) | |||
19226 | return true; | |||
19227 | ||||
19228 | const auto *VD = dyn_cast<VarDecl>(Var); | |||
19229 | if (VD) { | |||
19230 | if (VD->isInitCapture()) | |||
19231 | VarDC = VarDC->getParent(); | |||
19232 | } else { | |||
19233 | VD = Var->getPotentiallyDecomposedVarDecl(); | |||
19234 | } | |||
19235 | assert(VD && "Cannot capture a null variable")(static_cast <bool> (VD && "Cannot capture a null variable" ) ? void (0) : __assert_fail ("VD && \"Cannot capture a null variable\"" , "clang/lib/Sema/SemaExpr.cpp", 19235, __extension__ __PRETTY_FUNCTION__ )); | |||
19236 | ||||
19237 | const unsigned MaxFunctionScopesIndex = FunctionScopeIndexToStopAt | |||
19238 | ? *FunctionScopeIndexToStopAt : FunctionScopes.size() - 1; | |||
19239 | // We need to sync up the Declaration Context with the | |||
19240 | // FunctionScopeIndexToStopAt | |||
19241 | if (FunctionScopeIndexToStopAt) { | |||
19242 | unsigned FSIndex = FunctionScopes.size() - 1; | |||
19243 | while (FSIndex != MaxFunctionScopesIndex) { | |||
19244 | DC = getLambdaAwareParentOfDeclContext(DC); | |||
19245 | --FSIndex; | |||
19246 | } | |||
19247 | } | |||
19248 | ||||
19249 | // Capture global variables if it is required to use private copy of this | |||
19250 | // variable. | |||
19251 | bool IsGlobal = !VD->hasLocalStorage(); | |||
19252 | if (IsGlobal && | |||
19253 | !(LangOpts.OpenMP && isOpenMPCapturedDecl(Var, /*CheckScopeInfo=*/true, | |||
19254 | MaxFunctionScopesIndex))) | |||
19255 | return true; | |||
19256 | ||||
19257 | if (isa<VarDecl>(Var)) | |||
19258 | Var = cast<VarDecl>(Var->getCanonicalDecl()); | |||
19259 | ||||
19260 | // Walk up the stack to determine whether we can capture the variable, | |||
19261 | // performing the "simple" checks that don't depend on type. We stop when | |||
19262 | // we've either hit the declared scope of the variable or find an existing | |||
19263 | // capture of that variable. We start from the innermost capturing-entity | |||
19264 | // (the DC) and ensure that all intervening capturing-entities | |||
19265 | // (blocks/lambdas etc.) between the innermost capturer and the variable`s | |||
19266 | // declcontext can either capture the variable or have already captured | |||
19267 | // the variable. | |||
19268 | CaptureType = Var->getType(); | |||
19269 | DeclRefType = CaptureType.getNonReferenceType(); | |||
19270 | bool Nested = false; | |||
19271 | bool Explicit = (Kind != TryCapture_Implicit); | |||
19272 | unsigned FunctionScopesIndex = MaxFunctionScopesIndex; | |||
19273 | do { | |||
19274 | ||||
19275 | LambdaScopeInfo *LSI = nullptr; | |||
19276 | if (!FunctionScopes.empty()) | |||
19277 | LSI = dyn_cast_or_null<LambdaScopeInfo>( | |||
19278 | FunctionScopes[FunctionScopesIndex]); | |||
19279 | ||||
19280 | bool IsInScopeDeclarationContext = | |||
19281 | !LSI || LSI->AfterParameterList || CurContext == LSI->CallOperator; | |||
19282 | ||||
19283 | if (LSI && !LSI->AfterParameterList) { | |||
19284 | // This allows capturing parameters from a default value which does not | |||
19285 | // seems correct | |||
19286 | if (isa<ParmVarDecl>(Var) && !Var->getDeclContext()->isFunctionOrMethod()) | |||
19287 | return true; | |||
19288 | } | |||
19289 | // If the variable is declared in the current context, there is no need to | |||
19290 | // capture it. | |||
19291 | if (IsInScopeDeclarationContext && | |||
19292 | FunctionScopesIndex == MaxFunctionScopesIndex && VarDC == DC) | |||
19293 | return true; | |||
19294 | ||||
19295 | // When evaluating some attributes (like enable_if) we might refer to a | |||
19296 | // function parameter appertaining to the same declaration as that | |||
19297 | // attribute. | |||
19298 | if (const auto *Parm = dyn_cast<ParmVarDecl>(Var); | |||
19299 | Parm && Parm->getDeclContext() == DC) | |||
19300 | return true; | |||
19301 | ||||
19302 | // Only block literals, captured statements, and lambda expressions can | |||
19303 | // capture; other scopes don't work. | |||
19304 | DeclContext *ParentDC = | |||
19305 | !IsInScopeDeclarationContext | |||
19306 | ? DC->getParent() | |||
19307 | : getParentOfCapturingContextOrNull(DC, Var, ExprLoc, | |||
19308 | BuildAndDiagnose, *this); | |||
19309 | // We need to check for the parent *first* because, if we *have* | |||
19310 | // private-captured a global variable, we need to recursively capture it in | |||
19311 | // intermediate blocks, lambdas, etc. | |||
19312 | if (!ParentDC) { | |||
19313 | if (IsGlobal) { | |||
19314 | FunctionScopesIndex = MaxFunctionScopesIndex - 1; | |||
19315 | break; | |||
19316 | } | |||
19317 | return true; | |||
19318 | } | |||
19319 | ||||
19320 | FunctionScopeInfo *FSI = FunctionScopes[FunctionScopesIndex]; | |||
19321 | CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FSI); | |||
19322 | ||||
19323 | // Check whether we've already captured it. | |||
19324 | if (isVariableAlreadyCapturedInScopeInfo(CSI, Var, Nested, CaptureType, | |||
19325 | DeclRefType)) { | |||
19326 | CSI->getCapture(Var).markUsed(BuildAndDiagnose); | |||
19327 | break; | |||
19328 | } | |||
19329 | // If we are instantiating a generic lambda call operator body, | |||
19330 | // we do not want to capture new variables. What was captured | |||
19331 | // during either a lambdas transformation or initial parsing | |||
19332 | // should be used. | |||
19333 | if (isGenericLambdaCallOperatorSpecialization(DC)) { | |||
19334 | if (BuildAndDiagnose) { | |||
19335 | LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CSI); | |||
19336 | if (LSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None) { | |||
19337 | Diag(ExprLoc, diag::err_lambda_impcap) << Var; | |||
19338 | Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
19339 | Diag(LSI->Lambda->getBeginLoc(), diag::note_lambda_decl); | |||
19340 | buildLambdaCaptureFixit(*this, LSI, Var); | |||
19341 | } else | |||
19342 | diagnoseUncapturableValueReferenceOrBinding(*this, ExprLoc, Var); | |||
19343 | } | |||
19344 | return true; | |||
19345 | } | |||
19346 | ||||
19347 | // Try to capture variable-length arrays types. | |||
19348 | if (Var->getType()->isVariablyModifiedType()) { | |||
19349 | // We're going to walk down into the type and look for VLA | |||
19350 | // expressions. | |||
19351 | QualType QTy = Var->getType(); | |||
19352 | if (ParmVarDecl *PVD = dyn_cast_or_null<ParmVarDecl>(Var)) | |||
19353 | QTy = PVD->getOriginalType(); | |||
19354 | captureVariablyModifiedType(Context, QTy, CSI); | |||
19355 | } | |||
19356 | ||||
19357 | if (getLangOpts().OpenMP) { | |||
19358 | if (auto *RSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) { | |||
19359 | // OpenMP private variables should not be captured in outer scope, so | |||
19360 | // just break here. Similarly, global variables that are captured in a | |||
19361 | // target region should not be captured outside the scope of the region. | |||
19362 | if (RSI->CapRegionKind == CR_OpenMP) { | |||
19363 | OpenMPClauseKind IsOpenMPPrivateDecl = isOpenMPPrivateDecl( | |||
19364 | Var, RSI->OpenMPLevel, RSI->OpenMPCaptureLevel); | |||
19365 | // If the variable is private (i.e. not captured) and has variably | |||
19366 | // modified type, we still need to capture the type for correct | |||
19367 | // codegen in all regions, associated with the construct. Currently, | |||
19368 | // it is captured in the innermost captured region only. | |||
19369 | if (IsOpenMPPrivateDecl != OMPC_unknown && | |||
19370 | Var->getType()->isVariablyModifiedType()) { | |||
19371 | QualType QTy = Var->getType(); | |||
19372 | if (ParmVarDecl *PVD = dyn_cast_or_null<ParmVarDecl>(Var)) | |||
19373 | QTy = PVD->getOriginalType(); | |||
19374 | for (int I = 1, E = getNumberOfConstructScopes(RSI->OpenMPLevel); | |||
19375 | I < E; ++I) { | |||
19376 | auto *OuterRSI = cast<CapturedRegionScopeInfo>( | |||
19377 | FunctionScopes[FunctionScopesIndex - I]); | |||
19378 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19380, __extension__ __PRETTY_FUNCTION__ )) | |||
19379 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19380, __extension__ __PRETTY_FUNCTION__ )) | |||
19380 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19380, __extension__ __PRETTY_FUNCTION__ )); | |||
19381 | captureVariablyModifiedType(Context, QTy, OuterRSI); | |||
19382 | } | |||
19383 | } | |||
19384 | bool IsTargetCap = | |||
19385 | IsOpenMPPrivateDecl != OMPC_private && | |||
19386 | isOpenMPTargetCapturedDecl(Var, RSI->OpenMPLevel, | |||
19387 | RSI->OpenMPCaptureLevel); | |||
19388 | // Do not capture global if it is not privatized in outer regions. | |||
19389 | bool IsGlobalCap = | |||
19390 | IsGlobal && isOpenMPGlobalCapturedDecl(Var, RSI->OpenMPLevel, | |||
19391 | RSI->OpenMPCaptureLevel); | |||
19392 | ||||
19393 | // When we detect target captures we are looking from inside the | |||
19394 | // target region, therefore we need to propagate the capture from the | |||
19395 | // enclosing region. Therefore, the capture is not initially nested. | |||
19396 | if (IsTargetCap) | |||
19397 | adjustOpenMPTargetScopeIndex(FunctionScopesIndex, RSI->OpenMPLevel); | |||
19398 | ||||
19399 | if (IsTargetCap || IsOpenMPPrivateDecl == OMPC_private || | |||
19400 | (IsGlobal && !IsGlobalCap)) { | |||
19401 | Nested = !IsTargetCap; | |||
19402 | bool HasConst = DeclRefType.isConstQualified(); | |||
19403 | DeclRefType = DeclRefType.getUnqualifiedType(); | |||
19404 | // Don't lose diagnostics about assignments to const. | |||
19405 | if (HasConst) | |||
19406 | DeclRefType.addConst(); | |||
19407 | CaptureType = Context.getLValueReferenceType(DeclRefType); | |||
19408 | break; | |||
19409 | } | |||
19410 | } | |||
19411 | } | |||
19412 | } | |||
19413 | if (CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_None && !Explicit) { | |||
19414 | // No capture-default, and this is not an explicit capture | |||
19415 | // so cannot capture this variable. | |||
19416 | if (BuildAndDiagnose) { | |||
19417 | Diag(ExprLoc, diag::err_lambda_impcap) << Var; | |||
19418 | Diag(Var->getLocation(), diag::note_previous_decl) << Var; | |||
19419 | auto *LSI = cast<LambdaScopeInfo>(CSI); | |||
19420 | if (LSI->Lambda) { | |||
19421 | Diag(LSI->Lambda->getBeginLoc(), diag::note_lambda_decl); | |||
19422 | buildLambdaCaptureFixit(*this, LSI, Var); | |||
19423 | } | |||
19424 | // FIXME: If we error out because an outer lambda can not implicitly | |||
19425 | // capture a variable that an inner lambda explicitly captures, we | |||
19426 | // should have the inner lambda do the explicit capture - because | |||
19427 | // it makes for cleaner diagnostics later. This would purely be done | |||
19428 | // so that the diagnostic does not misleadingly claim that a variable | |||
19429 | // can not be captured by a lambda implicitly even though it is captured | |||
19430 | // explicitly. Suggestion: | |||
19431 | // - create const bool VariableCaptureWasInitiallyExplicit = Explicit | |||
19432 | // at the function head | |||
19433 | // - cache the StartingDeclContext - this must be a lambda | |||
19434 | // - captureInLambda in the innermost lambda the variable. | |||
19435 | } | |||
19436 | return true; | |||
19437 | } | |||
19438 | Explicit = false; | |||
19439 | FunctionScopesIndex--; | |||
19440 | if (IsInScopeDeclarationContext) | |||
19441 | DC = ParentDC; | |||
19442 | } while (!VarDC->Equals(DC)); | |||
19443 | ||||
19444 | // Walk back down the scope stack, (e.g. from outer lambda to inner lambda) | |||
19445 | // computing the type of the capture at each step, checking type-specific | |||
19446 | // requirements, and adding captures if requested. | |||
19447 | // If the variable had already been captured previously, we start capturing | |||
19448 | // at the lambda nested within that one. | |||
19449 | bool Invalid = false; | |||
19450 | for (unsigned I = ++FunctionScopesIndex, N = MaxFunctionScopesIndex + 1; I != N; | |||
19451 | ++I) { | |||
19452 | CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FunctionScopes[I]); | |||
19453 | ||||
19454 | // Certain capturing entities (lambdas, blocks etc.) are not allowed to capture | |||
19455 | // certain types of variables (unnamed, variably modified types etc.) | |||
19456 | // so check for eligibility. | |||
19457 | if (!Invalid) | |||
19458 | Invalid = | |||
19459 | !isVariableCapturable(CSI, Var, ExprLoc, BuildAndDiagnose, *this); | |||
19460 | ||||
19461 | // After encountering an error, if we're actually supposed to capture, keep | |||
19462 | // capturing in nested contexts to suppress any follow-on diagnostics. | |||
19463 | if (Invalid && !BuildAndDiagnose) | |||
19464 | return true; | |||
19465 | ||||
19466 | if (BlockScopeInfo *BSI = dyn_cast<BlockScopeInfo>(CSI)) { | |||
19467 | Invalid = !captureInBlock(BSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, | |||
19468 | DeclRefType, Nested, *this, Invalid); | |||
19469 | Nested = true; | |||
19470 | } else if (CapturedRegionScopeInfo *RSI = dyn_cast<CapturedRegionScopeInfo>(CSI)) { | |||
19471 | Invalid = !captureInCapturedRegion( | |||
19472 | RSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, DeclRefType, Nested, | |||
19473 | Kind, /*IsTopScope*/ I == N - 1, *this, Invalid); | |||
19474 | Nested = true; | |||
19475 | } else { | |||
19476 | LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CSI); | |||
19477 | Invalid = | |||
19478 | !captureInLambda(LSI, Var, ExprLoc, BuildAndDiagnose, CaptureType, | |||
19479 | DeclRefType, Nested, Kind, EllipsisLoc, | |||
19480 | /*IsTopScope*/ I == N - 1, *this, Invalid); | |||
19481 | Nested = true; | |||
19482 | } | |||
19483 | ||||
19484 | if (Invalid && !BuildAndDiagnose) | |||
19485 | return true; | |||
19486 | } | |||
19487 | return Invalid; | |||
19488 | } | |||
19489 | ||||
19490 | bool Sema::tryCaptureVariable(ValueDecl *Var, SourceLocation Loc, | |||
19491 | TryCaptureKind Kind, SourceLocation EllipsisLoc) { | |||
19492 | QualType CaptureType; | |||
19493 | QualType DeclRefType; | |||
19494 | return tryCaptureVariable(Var, Loc, Kind, EllipsisLoc, | |||
19495 | /*BuildAndDiagnose=*/true, CaptureType, | |||
19496 | DeclRefType, nullptr); | |||
19497 | } | |||
19498 | ||||
19499 | bool Sema::NeedToCaptureVariable(ValueDecl *Var, SourceLocation Loc) { | |||
19500 | QualType CaptureType; | |||
19501 | QualType DeclRefType; | |||
19502 | return !tryCaptureVariable(Var, Loc, TryCapture_Implicit, SourceLocation(), | |||
19503 | /*BuildAndDiagnose=*/false, CaptureType, | |||
19504 | DeclRefType, nullptr); | |||
19505 | } | |||
19506 | ||||
19507 | QualType Sema::getCapturedDeclRefType(ValueDecl *Var, SourceLocation Loc) { | |||
19508 | QualType CaptureType; | |||
19509 | QualType DeclRefType; | |||
19510 | ||||
19511 | // Determine whether we can capture this variable. | |||
19512 | if (tryCaptureVariable(Var, Loc, TryCapture_Implicit, SourceLocation(), | |||
19513 | /*BuildAndDiagnose=*/false, CaptureType, | |||
19514 | DeclRefType, nullptr)) | |||
19515 | return QualType(); | |||
19516 | ||||
19517 | return DeclRefType; | |||
19518 | } | |||
19519 | ||||
19520 | namespace { | |||
19521 | // Helper to copy the template arguments from a DeclRefExpr or MemberExpr. | |||
19522 | // The produced TemplateArgumentListInfo* points to data stored within this | |||
19523 | // object, so should only be used in contexts where the pointer will not be | |||
19524 | // used after the CopiedTemplateArgs object is destroyed. | |||
19525 | class CopiedTemplateArgs { | |||
19526 | bool HasArgs; | |||
19527 | TemplateArgumentListInfo TemplateArgStorage; | |||
19528 | public: | |||
19529 | template<typename RefExpr> | |||
19530 | CopiedTemplateArgs(RefExpr *E) : HasArgs(E->hasExplicitTemplateArgs()) { | |||
19531 | if (HasArgs) | |||
19532 | E->copyTemplateArgumentsInto(TemplateArgStorage); | |||
19533 | } | |||
19534 | operator TemplateArgumentListInfo*() | |||
19535 | #ifdef __has_cpp_attribute | |||
19536 | #if0 __has_cpp_attribute(clang::lifetimebound)1 | |||
19537 | [[clang::lifetimebound]] | |||
19538 | #endif | |||
19539 | #endif | |||
19540 | { | |||
19541 | return HasArgs ? &TemplateArgStorage : nullptr; | |||
19542 | } | |||
19543 | }; | |||
19544 | } | |||
19545 | ||||
19546 | /// Walk the set of potential results of an expression and mark them all as | |||
19547 | /// non-odr-uses if they satisfy the side-conditions of the NonOdrUseReason. | |||
19548 | /// | |||
19549 | /// \return A new expression if we found any potential results, ExprEmpty() if | |||
19550 | /// not, and ExprError() if we diagnosed an error. | |||
19551 | static ExprResult rebuildPotentialResultsAsNonOdrUsed(Sema &S, Expr *E, | |||
19552 | NonOdrUseReason NOUR) { | |||
19553 | // Per C++11 [basic.def.odr], a variable is odr-used "unless it is | |||
19554 | // an object that satisfies the requirements for appearing in a | |||
19555 | // constant expression (5.19) and the lvalue-to-rvalue conversion (4.1) | |||
19556 | // is immediately applied." This function handles the lvalue-to-rvalue | |||
19557 | // conversion part. | |||
19558 | // | |||
19559 | // If we encounter a node that claims to be an odr-use but shouldn't be, we | |||
19560 | // transform it into the relevant kind of non-odr-use node and rebuild the | |||
19561 | // tree of nodes leading to it. | |||
19562 | // | |||
19563 | // This is a mini-TreeTransform that only transforms a restricted subset of | |||
19564 | // nodes (and only certain operands of them). | |||
19565 | ||||
19566 | // Rebuild a subexpression. | |||
19567 | auto Rebuild = [&](Expr *Sub) { | |||
19568 | return rebuildPotentialResultsAsNonOdrUsed(S, Sub, NOUR); | |||
19569 | }; | |||
19570 | ||||
19571 | // Check whether a potential result satisfies the requirements of NOUR. | |||
19572 | auto IsPotentialResultOdrUsed = [&](NamedDecl *D) { | |||
19573 | // Any entity other than a VarDecl is always odr-used whenever it's named | |||
19574 | // in a potentially-evaluated expression. | |||
19575 | auto *VD = dyn_cast<VarDecl>(D); | |||
19576 | if (!VD) | |||
19577 | return true; | |||
19578 | ||||
19579 | // C++2a [basic.def.odr]p4: | |||
19580 | // A variable x whose name appears as a potentially-evalauted expression | |||
19581 | // e is odr-used by e unless | |||
19582 | // -- x is a reference that is usable in constant expressions, or | |||
19583 | // -- x is a variable of non-reference type that is usable in constant | |||
19584 | // expressions and has no mutable subobjects, and e is an element of | |||
19585 | // the set of potential results of an expression of | |||
19586 | // non-volatile-qualified non-class type to which the lvalue-to-rvalue | |||
19587 | // conversion is applied, or | |||
19588 | // -- x is a variable of non-reference type, and e is an element of the | |||
19589 | // set of potential results of a discarded-value expression to which | |||
19590 | // the lvalue-to-rvalue conversion is not applied | |||
19591 | // | |||
19592 | // We check the first bullet and the "potentially-evaluated" condition in | |||
19593 | // BuildDeclRefExpr. We check the type requirements in the second bullet | |||
19594 | // in CheckLValueToRValueConversionOperand below. | |||
19595 | switch (NOUR) { | |||
19596 | case NOUR_None: | |||
19597 | case NOUR_Unevaluated: | |||
19598 | llvm_unreachable("unexpected non-odr-use-reason")::llvm::llvm_unreachable_internal("unexpected non-odr-use-reason" , "clang/lib/Sema/SemaExpr.cpp", 19598); | |||
19599 | ||||
19600 | case NOUR_Constant: | |||
19601 | // Constant references were handled when they were built. | |||
19602 | if (VD->getType()->isReferenceType()) | |||
19603 | return true; | |||
19604 | if (auto *RD = VD->getType()->getAsCXXRecordDecl()) | |||
19605 | if (RD->hasMutableFields()) | |||
19606 | return true; | |||
19607 | if (!VD->isUsableInConstantExpressions(S.Context)) | |||
19608 | return true; | |||
19609 | break; | |||
19610 | ||||
19611 | case NOUR_Discarded: | |||
19612 | if (VD->getType()->isReferenceType()) | |||
19613 | return true; | |||
19614 | break; | |||
19615 | } | |||
19616 | return false; | |||
19617 | }; | |||
19618 | ||||
19619 | // Mark that this expression does not constitute an odr-use. | |||
19620 | auto MarkNotOdrUsed = [&] { | |||
19621 | S.MaybeODRUseExprs.remove(E); | |||
19622 | if (LambdaScopeInfo *LSI = S.getCurLambda()) | |||
19623 | LSI->markVariableExprAsNonODRUsed(E); | |||
19624 | }; | |||
19625 | ||||
19626 | // C++2a [basic.def.odr]p2: | |||
19627 | // The set of potential results of an expression e is defined as follows: | |||
19628 | switch (E->getStmtClass()) { | |||
19629 | // -- If e is an id-expression, ... | |||
19630 | case Expr::DeclRefExprClass: { | |||
19631 | auto *DRE = cast<DeclRefExpr>(E); | |||
19632 | if (DRE->isNonOdrUse() || IsPotentialResultOdrUsed(DRE->getDecl())) | |||
19633 | break; | |||
19634 | ||||
19635 | // Rebuild as a non-odr-use DeclRefExpr. | |||
19636 | MarkNotOdrUsed(); | |||
19637 | return DeclRefExpr::Create( | |||
19638 | S.Context, DRE->getQualifierLoc(), DRE->getTemplateKeywordLoc(), | |||
19639 | DRE->getDecl(), DRE->refersToEnclosingVariableOrCapture(), | |||
19640 | DRE->getNameInfo(), DRE->getType(), DRE->getValueKind(), | |||
19641 | DRE->getFoundDecl(), CopiedTemplateArgs(DRE), NOUR); | |||
19642 | } | |||
19643 | ||||
19644 | case Expr::FunctionParmPackExprClass: { | |||
19645 | auto *FPPE = cast<FunctionParmPackExpr>(E); | |||
19646 | // If any of the declarations in the pack is odr-used, then the expression | |||
19647 | // as a whole constitutes an odr-use. | |||
19648 | for (VarDecl *D : *FPPE) | |||
19649 | if (IsPotentialResultOdrUsed(D)) | |||
19650 | return ExprEmpty(); | |||
19651 | ||||
19652 | // FIXME: Rebuild as a non-odr-use FunctionParmPackExpr? In practice, | |||
19653 | // nothing cares about whether we marked this as an odr-use, but it might | |||
19654 | // be useful for non-compiler tools. | |||
19655 | MarkNotOdrUsed(); | |||
19656 | break; | |||
19657 | } | |||
19658 | ||||
19659 | // -- If e is a subscripting operation with an array operand... | |||
19660 | case Expr::ArraySubscriptExprClass: { | |||
19661 | auto *ASE = cast<ArraySubscriptExpr>(E); | |||
19662 | Expr *OldBase = ASE->getBase()->IgnoreImplicit(); | |||
19663 | if (!OldBase->getType()->isArrayType()) | |||
19664 | break; | |||
19665 | ExprResult Base = Rebuild(OldBase); | |||
19666 | if (!Base.isUsable()) | |||
19667 | return Base; | |||
19668 | Expr *LHS = ASE->getBase() == ASE->getLHS() ? Base.get() : ASE->getLHS(); | |||
19669 | Expr *RHS = ASE->getBase() == ASE->getRHS() ? Base.get() : ASE->getRHS(); | |||
19670 | SourceLocation LBracketLoc = ASE->getBeginLoc(); // FIXME: Not stored. | |||
19671 | return S.ActOnArraySubscriptExpr(nullptr, LHS, LBracketLoc, RHS, | |||
19672 | ASE->getRBracketLoc()); | |||
19673 | } | |||
19674 | ||||
19675 | case Expr::MemberExprClass: { | |||
19676 | auto *ME = cast<MemberExpr>(E); | |||
19677 | // -- If e is a class member access expression [...] naming a non-static | |||
19678 | // data member... | |||
19679 | if (isa<FieldDecl>(ME->getMemberDecl())) { | |||
19680 | ExprResult Base = Rebuild(ME->getBase()); | |||
19681 | if (!Base.isUsable()) | |||
19682 | return Base; | |||
19683 | return MemberExpr::Create( | |||
19684 | S.Context, Base.get(), ME->isArrow(), ME->getOperatorLoc(), | |||
19685 | ME->getQualifierLoc(), ME->getTemplateKeywordLoc(), | |||
19686 | ME->getMemberDecl(), ME->getFoundDecl(), ME->getMemberNameInfo(), | |||
19687 | CopiedTemplateArgs(ME), ME->getType(), ME->getValueKind(), | |||
19688 | ME->getObjectKind(), ME->isNonOdrUse()); | |||
19689 | } | |||
19690 | ||||
19691 | if (ME->getMemberDecl()->isCXXInstanceMember()) | |||
19692 | break; | |||
19693 | ||||
19694 | // -- If e is a class member access expression naming a static data member, | |||
19695 | // ... | |||
19696 | if (ME->isNonOdrUse() || IsPotentialResultOdrUsed(ME->getMemberDecl())) | |||
19697 | break; | |||
19698 | ||||
19699 | // Rebuild as a non-odr-use MemberExpr. | |||
19700 | MarkNotOdrUsed(); | |||
19701 | return MemberExpr::Create( | |||
19702 | S.Context, ME->getBase(), ME->isArrow(), ME->getOperatorLoc(), | |||
19703 | ME->getQualifierLoc(), ME->getTemplateKeywordLoc(), ME->getMemberDecl(), | |||
19704 | ME->getFoundDecl(), ME->getMemberNameInfo(), CopiedTemplateArgs(ME), | |||
19705 | ME->getType(), ME->getValueKind(), ME->getObjectKind(), NOUR); | |||
19706 | } | |||
19707 | ||||
19708 | case Expr::BinaryOperatorClass: { | |||
19709 | auto *BO = cast<BinaryOperator>(E); | |||
19710 | Expr *LHS = BO->getLHS(); | |||
19711 | Expr *RHS = BO->getRHS(); | |||
19712 | // -- If e is a pointer-to-member expression of the form e1 .* e2 ... | |||
19713 | if (BO->getOpcode() == BO_PtrMemD) { | |||
19714 | ExprResult Sub = Rebuild(LHS); | |||
19715 | if (!Sub.isUsable()) | |||
19716 | return Sub; | |||
19717 | LHS = Sub.get(); | |||
19718 | // -- If e is a comma expression, ... | |||
19719 | } else if (BO->getOpcode() == BO_Comma) { | |||
19720 | ExprResult Sub = Rebuild(RHS); | |||
19721 | if (!Sub.isUsable()) | |||
19722 | return Sub; | |||
19723 | RHS = Sub.get(); | |||
19724 | } else { | |||
19725 | break; | |||
19726 | } | |||
19727 | return S.BuildBinOp(nullptr, BO->getOperatorLoc(), BO->getOpcode(), | |||
19728 | LHS, RHS); | |||
19729 | } | |||
19730 | ||||
19731 | // -- If e has the form (e1)... | |||
19732 | case Expr::ParenExprClass: { | |||
19733 | auto *PE = cast<ParenExpr>(E); | |||
19734 | ExprResult Sub = Rebuild(PE->getSubExpr()); | |||
19735 | if (!Sub.isUsable()) | |||
19736 | return Sub; | |||
19737 | return S.ActOnParenExpr(PE->getLParen(), PE->getRParen(), Sub.get()); | |||
19738 | } | |||
19739 | ||||
19740 | // -- If e is a glvalue conditional expression, ... | |||
19741 | // We don't apply this to a binary conditional operator. FIXME: Should we? | |||
19742 | case Expr::ConditionalOperatorClass: { | |||
19743 | auto *CO = cast<ConditionalOperator>(E); | |||
19744 | ExprResult LHS = Rebuild(CO->getLHS()); | |||
19745 | if (LHS.isInvalid()) | |||
19746 | return ExprError(); | |||
19747 | ExprResult RHS = Rebuild(CO->getRHS()); | |||
19748 | if (RHS.isInvalid()) | |||
19749 | return ExprError(); | |||
19750 | if (!LHS.isUsable() && !RHS.isUsable()) | |||
19751 | return ExprEmpty(); | |||
19752 | if (!LHS.isUsable()) | |||
19753 | LHS = CO->getLHS(); | |||
19754 | if (!RHS.isUsable()) | |||
19755 | RHS = CO->getRHS(); | |||
19756 | return S.ActOnConditionalOp(CO->getQuestionLoc(), CO->getColonLoc(), | |||
19757 | CO->getCond(), LHS.get(), RHS.get()); | |||
19758 | } | |||
19759 | ||||
19760 | // [Clang extension] | |||
19761 | // -- If e has the form __extension__ e1... | |||
19762 | case Expr::UnaryOperatorClass: { | |||
19763 | auto *UO = cast<UnaryOperator>(E); | |||
19764 | if (UO->getOpcode() != UO_Extension) | |||
19765 | break; | |||
19766 | ExprResult Sub = Rebuild(UO->getSubExpr()); | |||
19767 | if (!Sub.isUsable()) | |||
19768 | return Sub; | |||
19769 | return S.BuildUnaryOp(nullptr, UO->getOperatorLoc(), UO_Extension, | |||
19770 | Sub.get()); | |||
19771 | } | |||
19772 | ||||
19773 | // [Clang extension] | |||
19774 | // -- If e has the form _Generic(...), the set of potential results is the | |||
19775 | // union of the sets of potential results of the associated expressions. | |||
19776 | case Expr::GenericSelectionExprClass: { | |||
19777 | auto *GSE = cast<GenericSelectionExpr>(E); | |||
19778 | ||||
19779 | SmallVector<Expr *, 4> AssocExprs; | |||
19780 | bool AnyChanged = false; | |||
19781 | for (Expr *OrigAssocExpr : GSE->getAssocExprs()) { | |||
19782 | ExprResult AssocExpr = Rebuild(OrigAssocExpr); | |||
19783 | if (AssocExpr.isInvalid()) | |||
19784 | return ExprError(); | |||
19785 | if (AssocExpr.isUsable()) { | |||
19786 | AssocExprs.push_back(AssocExpr.get()); | |||
19787 | AnyChanged = true; | |||
19788 | } else { | |||
19789 | AssocExprs.push_back(OrigAssocExpr); | |||
19790 | } | |||
19791 | } | |||
19792 | ||||
19793 | return AnyChanged ? S.CreateGenericSelectionExpr( | |||
19794 | GSE->getGenericLoc(), GSE->getDefaultLoc(), | |||
19795 | GSE->getRParenLoc(), GSE->getControllingExpr(), | |||
19796 | GSE->getAssocTypeSourceInfos(), AssocExprs) | |||
19797 | : ExprEmpty(); | |||
19798 | } | |||
19799 | ||||
19800 | // [Clang extension] | |||
19801 | // -- If e has the form __builtin_choose_expr(...), the set of potential | |||
19802 | // results is the union of the sets of potential results of the | |||
19803 | // second and third subexpressions. | |||
19804 | case Expr::ChooseExprClass: { | |||
19805 | auto *CE = cast<ChooseExpr>(E); | |||
19806 | ||||
19807 | ExprResult LHS = Rebuild(CE->getLHS()); | |||
19808 | if (LHS.isInvalid()) | |||
19809 | return ExprError(); | |||
19810 | ||||
19811 | ExprResult RHS = Rebuild(CE->getLHS()); | |||
19812 | if (RHS.isInvalid()) | |||
19813 | return ExprError(); | |||
19814 | ||||
19815 | if (!LHS.get() && !RHS.get()) | |||
19816 | return ExprEmpty(); | |||
19817 | if (!LHS.isUsable()) | |||
19818 | LHS = CE->getLHS(); | |||
19819 | if (!RHS.isUsable()) | |||
19820 | RHS = CE->getRHS(); | |||
19821 | ||||
19822 | return S.ActOnChooseExpr(CE->getBuiltinLoc(), CE->getCond(), LHS.get(), | |||
19823 | RHS.get(), CE->getRParenLoc()); | |||
19824 | } | |||
19825 | ||||
19826 | // Step through non-syntactic nodes. | |||
19827 | case Expr::ConstantExprClass: { | |||
19828 | auto *CE = cast<ConstantExpr>(E); | |||
19829 | ExprResult Sub = Rebuild(CE->getSubExpr()); | |||
19830 | if (!Sub.isUsable()) | |||
19831 | return Sub; | |||
19832 | return ConstantExpr::Create(S.Context, Sub.get()); | |||
19833 | } | |||
19834 | ||||
19835 | // We could mostly rely on the recursive rebuilding to rebuild implicit | |||
19836 | // casts, but not at the top level, so rebuild them here. | |||
19837 | case Expr::ImplicitCastExprClass: { | |||
19838 | auto *ICE = cast<ImplicitCastExpr>(E); | |||
19839 | // Only step through the narrow set of cast kinds we expect to encounter. | |||
19840 | // Anything else suggests we've left the region in which potential results | |||
19841 | // can be found. | |||
19842 | switch (ICE->getCastKind()) { | |||
19843 | case CK_NoOp: | |||
19844 | case CK_DerivedToBase: | |||
19845 | case CK_UncheckedDerivedToBase: { | |||
19846 | ExprResult Sub = Rebuild(ICE->getSubExpr()); | |||
19847 | if (!Sub.isUsable()) | |||
19848 | return Sub; | |||
19849 | CXXCastPath Path(ICE->path()); | |||
19850 | return S.ImpCastExprToType(Sub.get(), ICE->getType(), ICE->getCastKind(), | |||
19851 | ICE->getValueKind(), &Path); | |||
19852 | } | |||
19853 | ||||
19854 | default: | |||
19855 | break; | |||
19856 | } | |||
19857 | break; | |||
19858 | } | |||
19859 | ||||
19860 | default: | |||
19861 | break; | |||
19862 | } | |||
19863 | ||||
19864 | // Can't traverse through this node. Nothing to do. | |||
19865 | return ExprEmpty(); | |||
19866 | } | |||
19867 | ||||
19868 | ExprResult Sema::CheckLValueToRValueConversionOperand(Expr *E) { | |||
19869 | // Check whether the operand is or contains an object of non-trivial C union | |||
19870 | // type. | |||
19871 | if (E->getType().isVolatileQualified() && | |||
19872 | (E->getType().hasNonTrivialToPrimitiveDestructCUnion() || | |||
19873 | E->getType().hasNonTrivialToPrimitiveCopyCUnion())) | |||
19874 | checkNonTrivialCUnion(E->getType(), E->getExprLoc(), | |||
19875 | Sema::NTCUC_LValueToRValueVolatile, | |||
19876 | NTCUK_Destruct|NTCUK_Copy); | |||
19877 | ||||
19878 | // C++2a [basic.def.odr]p4: | |||
19879 | // [...] an expression of non-volatile-qualified non-class type to which | |||
19880 | // the lvalue-to-rvalue conversion is applied [...] | |||
19881 | if (E->getType().isVolatileQualified() || E->getType()->getAs<RecordType>()) | |||
19882 | return E; | |||
19883 | ||||
19884 | ExprResult Result = | |||
19885 | rebuildPotentialResultsAsNonOdrUsed(*this, E, NOUR_Constant); | |||
19886 | if (Result.isInvalid()) | |||
19887 | return ExprError(); | |||
19888 | return Result.get() ? Result : E; | |||
19889 | } | |||
19890 | ||||
19891 | ExprResult Sema::ActOnConstantExpression(ExprResult Res) { | |||
19892 | Res = CorrectDelayedTyposInExpr(Res); | |||
19893 | ||||
19894 | if (!Res.isUsable()) | |||
19895 | return Res; | |||
19896 | ||||
19897 | // If a constant-expression is a reference to a variable where we delay | |||
19898 | // deciding whether it is an odr-use, just assume we will apply the | |||
19899 | // lvalue-to-rvalue conversion. In the one case where this doesn't happen | |||
19900 | // (a non-type template argument), we have special handling anyway. | |||
19901 | return CheckLValueToRValueConversionOperand(Res.get()); | |||
19902 | } | |||
19903 | ||||
19904 | void Sema::CleanupVarDeclMarking() { | |||
19905 | // Iterate through a local copy in case MarkVarDeclODRUsed makes a recursive | |||
19906 | // call. | |||
19907 | MaybeODRUseExprSet LocalMaybeODRUseExprs; | |||
19908 | std::swap(LocalMaybeODRUseExprs, MaybeODRUseExprs); | |||
19909 | ||||
19910 | for (Expr *E : LocalMaybeODRUseExprs) { | |||
19911 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) { | |||
19912 | MarkVarDeclODRUsed(cast<VarDecl>(DRE->getDecl()), | |||
19913 | DRE->getLocation(), *this); | |||
19914 | } else if (auto *ME = dyn_cast<MemberExpr>(E)) { | |||
19915 | MarkVarDeclODRUsed(cast<VarDecl>(ME->getMemberDecl()), ME->getMemberLoc(), | |||
19916 | *this); | |||
19917 | } else if (auto *FP = dyn_cast<FunctionParmPackExpr>(E)) { | |||
19918 | for (VarDecl *VD : *FP) | |||
19919 | MarkVarDeclODRUsed(VD, FP->getParameterPackLocation(), *this); | |||
19920 | } else { | |||
19921 | llvm_unreachable("Unexpected expression")::llvm::llvm_unreachable_internal("Unexpected expression", "clang/lib/Sema/SemaExpr.cpp" , 19921); | |||
19922 | } | |||
19923 | } | |||
19924 | ||||
19925 | assert(MaybeODRUseExprs.empty() &&(static_cast <bool> (MaybeODRUseExprs.empty() && "MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"MarkVarDeclODRUsed failed to cleanup MaybeODRUseExprs?\"" , "clang/lib/Sema/SemaExpr.cpp", 19926, __extension__ __PRETTY_FUNCTION__ )) | |||
19926 | "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?\"" , "clang/lib/Sema/SemaExpr.cpp", 19926, __extension__ __PRETTY_FUNCTION__ )); | |||
19927 | } | |||
19928 | ||||
19929 | static void DoMarkPotentialCapture(Sema &SemaRef, SourceLocation Loc, | |||
19930 | ValueDecl *Var, Expr *E) { | |||
19931 | VarDecl *VD = Var->getPotentiallyDecomposedVarDecl(); | |||
19932 | if (!VD) | |||
19933 | return; | |||
19934 | ||||
19935 | const bool RefersToEnclosingScope = | |||
19936 | (SemaRef.CurContext != VD->getDeclContext() && | |||
19937 | VD->getDeclContext()->isFunctionOrMethod() && VD->hasLocalStorage()); | |||
19938 | if (RefersToEnclosingScope) { | |||
19939 | LambdaScopeInfo *const LSI = | |||
19940 | SemaRef.getCurLambda(/*IgnoreNonLambdaCapturingScope=*/true); | |||
19941 | if (LSI && (!LSI->CallOperator || | |||
19942 | !LSI->CallOperator->Encloses(Var->getDeclContext()))) { | |||
19943 | // If a variable could potentially be odr-used, defer marking it so | |||
19944 | // until we finish analyzing the full expression for any | |||
19945 | // lvalue-to-rvalue | |||
19946 | // or discarded value conversions that would obviate odr-use. | |||
19947 | // Add it to the list of potential captures that will be analyzed | |||
19948 | // later (ActOnFinishFullExpr) for eventual capture and odr-use marking | |||
19949 | // unless the variable is a reference that was initialized by a constant | |||
19950 | // expression (this will never need to be captured or odr-used). | |||
19951 | // | |||
19952 | // FIXME: We can simplify this a lot after implementing P0588R1. | |||
19953 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19953, __extension__ __PRETTY_FUNCTION__ )); | |||
19954 | if (!Var->getType()->isReferenceType() || | |||
19955 | !VD->isUsableInConstantExpressions(SemaRef.Context)) | |||
19956 | LSI->addPotentialCapture(E->IgnoreParens()); | |||
19957 | } | |||
19958 | } | |||
19959 | } | |||
19960 | ||||
19961 | static void DoMarkVarDeclReferenced( | |||
19962 | Sema &SemaRef, SourceLocation Loc, VarDecl *Var, Expr *E, | |||
19963 | llvm::DenseMap<const VarDecl *, int> &RefsMinusAssignments) { | |||
19964 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 19966, __extension__ __PRETTY_FUNCTION__ )) | |||
19965 | 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\"" , "clang/lib/Sema/SemaExpr.cpp", 19966, __extension__ __PRETTY_FUNCTION__ )) | |||
19966 | "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\"" , "clang/lib/Sema/SemaExpr.cpp", 19966, __extension__ __PRETTY_FUNCTION__ )); | |||
19967 | Var->setReferenced(); | |||
19968 | ||||
19969 | if (Var->isInvalidDecl()) | |||
19970 | return; | |||
19971 | ||||
19972 | auto *MSI = Var->getMemberSpecializationInfo(); | |||
19973 | TemplateSpecializationKind TSK = MSI ? MSI->getTemplateSpecializationKind() | |||
19974 | : Var->getTemplateSpecializationKind(); | |||
19975 | ||||
19976 | OdrUseContext OdrUse = isOdrUseContext(SemaRef); | |||
19977 | bool UsableInConstantExpr = | |||
19978 | Var->mightBeUsableInConstantExpressions(SemaRef.Context); | |||
19979 | ||||
19980 | if (Var->isLocalVarDeclOrParm() && !Var->hasExternalStorage()) { | |||
19981 | RefsMinusAssignments.insert({Var, 0}).first->getSecond()++; | |||
19982 | } | |||
19983 | ||||
19984 | // C++20 [expr.const]p12: | |||
19985 | // A variable [...] is needed for constant evaluation if it is [...] a | |||
19986 | // variable whose name appears as a potentially constant evaluated | |||
19987 | // expression that is either a contexpr variable or is of non-volatile | |||
19988 | // const-qualified integral type or of reference type | |||
19989 | bool NeededForConstantEvaluation = | |||
19990 | isPotentiallyConstantEvaluatedContext(SemaRef) && UsableInConstantExpr; | |||
19991 | ||||
19992 | bool NeedDefinition = | |||
19993 | OdrUse == OdrUseContext::Used || NeededForConstantEvaluation; | |||
19994 | ||||
19995 | 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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19996, __extension__ __PRETTY_FUNCTION__ )) | |||
19996 | "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.\"" , "clang/lib/Sema/SemaExpr.cpp", 19996, __extension__ __PRETTY_FUNCTION__ )); | |||
19997 | ||||
19998 | // If this might be a member specialization of a static data member, check | |||
19999 | // the specialization is visible. We already did the checks for variable | |||
20000 | // template specializations when we created them. | |||
20001 | if (NeedDefinition && TSK != TSK_Undeclared && | |||
20002 | !isa<VarTemplateSpecializationDecl>(Var)) | |||
20003 | SemaRef.checkSpecializationVisibility(Loc, Var); | |||
20004 | ||||
20005 | // Perform implicit instantiation of static data members, static data member | |||
20006 | // templates of class templates, and variable template specializations. Delay | |||
20007 | // instantiations of variable templates, except for those that could be used | |||
20008 | // in a constant expression. | |||
20009 | if (NeedDefinition && isTemplateInstantiation(TSK)) { | |||
20010 | // Per C++17 [temp.explicit]p10, we may instantiate despite an explicit | |||
20011 | // instantiation declaration if a variable is usable in a constant | |||
20012 | // expression (among other cases). | |||
20013 | bool TryInstantiating = | |||
20014 | TSK == TSK_ImplicitInstantiation || | |||
20015 | (TSK == TSK_ExplicitInstantiationDeclaration && UsableInConstantExpr); | |||
20016 | ||||
20017 | if (TryInstantiating) { | |||
20018 | SourceLocation PointOfInstantiation = | |||
20019 | MSI ? MSI->getPointOfInstantiation() : Var->getPointOfInstantiation(); | |||
20020 | bool FirstInstantiation = PointOfInstantiation.isInvalid(); | |||
20021 | if (FirstInstantiation) { | |||
20022 | PointOfInstantiation = Loc; | |||
20023 | if (MSI) | |||
20024 | MSI->setPointOfInstantiation(PointOfInstantiation); | |||
20025 | // FIXME: Notify listener. | |||
20026 | else | |||
20027 | Var->setTemplateSpecializationKind(TSK, PointOfInstantiation); | |||
20028 | } | |||
20029 | ||||
20030 | if (UsableInConstantExpr) { | |||
20031 | // Do not defer instantiations of variables that could be used in a | |||
20032 | // constant expression. | |||
20033 | SemaRef.runWithSufficientStackSpace(PointOfInstantiation, [&] { | |||
20034 | SemaRef.InstantiateVariableDefinition(PointOfInstantiation, Var); | |||
20035 | }); | |||
20036 | ||||
20037 | // Re-set the member to trigger a recomputation of the dependence bits | |||
20038 | // for the expression. | |||
20039 | if (auto *DRE = dyn_cast_or_null<DeclRefExpr>(E)) | |||
20040 | DRE->setDecl(DRE->getDecl()); | |||
20041 | else if (auto *ME = dyn_cast_or_null<MemberExpr>(E)) | |||
20042 | ME->setMemberDecl(ME->getMemberDecl()); | |||
20043 | } else if (FirstInstantiation) { | |||
20044 | SemaRef.PendingInstantiations | |||
20045 | .push_back(std::make_pair(Var, PointOfInstantiation)); | |||
20046 | } else { | |||
20047 | bool Inserted = false; | |||
20048 | for (auto &I : SemaRef.SavedPendingInstantiations) { | |||
20049 | auto Iter = llvm::find_if( | |||
20050 | I, [Var](const Sema::PendingImplicitInstantiation &P) { | |||
20051 | return P.first == Var; | |||
20052 | }); | |||
20053 | if (Iter != I.end()) { | |||
20054 | SemaRef.PendingInstantiations.push_back(*Iter); | |||
20055 | I.erase(Iter); | |||
20056 | Inserted = true; | |||
20057 | break; | |||
20058 | } | |||
20059 | } | |||
20060 | ||||
20061 | // FIXME: For a specialization of a variable template, we don't | |||
20062 | // distinguish between "declaration and type implicitly instantiated" | |||
20063 | // and "implicit instantiation of definition requested", so we have | |||
20064 | // no direct way to avoid enqueueing the pending instantiation | |||
20065 | // multiple times. | |||
20066 | if (isa<VarTemplateSpecializationDecl>(Var) && !Inserted) | |||
20067 | SemaRef.PendingInstantiations | |||
20068 | .push_back(std::make_pair(Var, PointOfInstantiation)); | |||
20069 | } | |||
20070 | } | |||
20071 | } | |||
20072 | ||||
20073 | // C++2a [basic.def.odr]p4: | |||
20074 | // A variable x whose name appears as a potentially-evaluated expression e | |||
20075 | // is odr-used by e unless | |||
20076 | // -- x is a reference that is usable in constant expressions | |||
20077 | // -- x is a variable of non-reference type that is usable in constant | |||
20078 | // expressions and has no mutable subobjects [FIXME], and e is an | |||
20079 | // element of the set of potential results of an expression of | |||
20080 | // non-volatile-qualified non-class type to which the lvalue-to-rvalue | |||
20081 | // conversion is applied | |||
20082 | // -- x is a variable of non-reference type, and e is an element of the set | |||
20083 | // of potential results of a discarded-value expression to which the | |||
20084 | // lvalue-to-rvalue conversion is not applied [FIXME] | |||
20085 | // | |||
20086 | // We check the first part of the second bullet here, and | |||
20087 | // Sema::CheckLValueToRValueConversionOperand deals with the second part. | |||
20088 | // FIXME: To get the third bullet right, we need to delay this even for | |||
20089 | // variables that are not usable in constant expressions. | |||
20090 | ||||
20091 | // If we already know this isn't an odr-use, there's nothing more to do. | |||
20092 | if (DeclRefExpr *DRE = dyn_cast_or_null<DeclRefExpr>(E)) | |||
20093 | if (DRE->isNonOdrUse()) | |||
20094 | return; | |||
20095 | if (MemberExpr *ME = dyn_cast_or_null<MemberExpr>(E)) | |||
20096 | if (ME->isNonOdrUse()) | |||
20097 | return; | |||
20098 | ||||
20099 | switch (OdrUse) { | |||
20100 | case OdrUseContext::None: | |||
20101 | // In some cases, a variable may not have been marked unevaluated, if it | |||
20102 | // appears in a defaukt initializer. | |||
20103 | assert((!E || isa<FunctionParmPackExpr>(E) ||(static_cast <bool> ((!E || isa<FunctionParmPackExpr >(E) || SemaRef.isUnevaluatedContext()) && "missing non-odr-use marking for unevaluated decl ref" ) ? void (0) : __assert_fail ("(!E || isa<FunctionParmPackExpr>(E) || SemaRef.isUnevaluatedContext()) && \"missing non-odr-use marking for unevaluated decl ref\"" , "clang/lib/Sema/SemaExpr.cpp", 20105, __extension__ __PRETTY_FUNCTION__ )) | |||
20104 | SemaRef.isUnevaluatedContext()) &&(static_cast <bool> ((!E || isa<FunctionParmPackExpr >(E) || SemaRef.isUnevaluatedContext()) && "missing non-odr-use marking for unevaluated decl ref" ) ? void (0) : __assert_fail ("(!E || isa<FunctionParmPackExpr>(E) || SemaRef.isUnevaluatedContext()) && \"missing non-odr-use marking for unevaluated decl ref\"" , "clang/lib/Sema/SemaExpr.cpp", 20105, __extension__ __PRETTY_FUNCTION__ )) | |||
20105 | "missing non-odr-use marking for unevaluated decl ref")(static_cast <bool> ((!E || isa<FunctionParmPackExpr >(E) || SemaRef.isUnevaluatedContext()) && "missing non-odr-use marking for unevaluated decl ref" ) ? void (0) : __assert_fail ("(!E || isa<FunctionParmPackExpr>(E) || SemaRef.isUnevaluatedContext()) && \"missing non-odr-use marking for unevaluated decl ref\"" , "clang/lib/Sema/SemaExpr.cpp", 20105, __extension__ __PRETTY_FUNCTION__ )); | |||
20106 | break; | |||
20107 | ||||
20108 | case OdrUseContext::FormallyOdrUsed: | |||
20109 | // FIXME: Ignoring formal odr-uses results in incorrect lambda capture | |||
20110 | // behavior. | |||
20111 | break; | |||
20112 | ||||
20113 | case OdrUseContext::Used: | |||
20114 | // If we might later find that this expression isn't actually an odr-use, | |||
20115 | // delay the marking. | |||
20116 | if (E && Var->isUsableInConstantExpressions(SemaRef.Context)) | |||
20117 | SemaRef.MaybeODRUseExprs.insert(E); | |||
20118 | else | |||
20119 | MarkVarDeclODRUsed(Var, Loc, SemaRef); | |||
20120 | break; | |||
20121 | ||||
20122 | case OdrUseContext::Dependent: | |||
20123 | // If this is a dependent context, we don't need to mark variables as | |||
20124 | // odr-used, but we may still need to track them for lambda capture. | |||
20125 | // FIXME: Do we also need to do this inside dependent typeid expressions | |||
20126 | // (which are modeled as unevaluated at this point)? | |||
20127 | DoMarkPotentialCapture(SemaRef, Loc, Var, E); | |||
20128 | break; | |||
20129 | } | |||
20130 | } | |||
20131 | ||||
20132 | static void DoMarkBindingDeclReferenced(Sema &SemaRef, SourceLocation Loc, | |||
20133 | BindingDecl *BD, Expr *E) { | |||
20134 | BD->setReferenced(); | |||
20135 | ||||
20136 | if (BD->isInvalidDecl()) | |||
20137 | return; | |||
20138 | ||||
20139 | OdrUseContext OdrUse = isOdrUseContext(SemaRef); | |||
20140 | if (OdrUse == OdrUseContext::Used) { | |||
20141 | QualType CaptureType, DeclRefType; | |||
20142 | SemaRef.tryCaptureVariable(BD, Loc, Sema::TryCapture_Implicit, | |||
20143 | /*EllipsisLoc*/ SourceLocation(), | |||
20144 | /*BuildAndDiagnose*/ true, CaptureType, | |||
20145 | DeclRefType, | |||
20146 | /*FunctionScopeIndexToStopAt*/ nullptr); | |||
20147 | } else if (OdrUse == OdrUseContext::Dependent) { | |||
20148 | DoMarkPotentialCapture(SemaRef, Loc, BD, E); | |||
20149 | } | |||
20150 | } | |||
20151 | ||||
20152 | /// Mark a variable referenced, and check whether it is odr-used | |||
20153 | /// (C++ [basic.def.odr]p2, C99 6.9p3). Note that this should not be | |||
20154 | /// used directly for normal expressions referring to VarDecl. | |||
20155 | void Sema::MarkVariableReferenced(SourceLocation Loc, VarDecl *Var) { | |||
20156 | DoMarkVarDeclReferenced(*this, Loc, Var, nullptr, RefsMinusAssignments); | |||
20157 | } | |||
20158 | ||||
20159 | static void | |||
20160 | MarkExprReferenced(Sema &SemaRef, SourceLocation Loc, Decl *D, Expr *E, | |||
20161 | bool MightBeOdrUse, | |||
20162 | llvm::DenseMap<const VarDecl *, int> &RefsMinusAssignments) { | |||
20163 | if (SemaRef.isInOpenMPDeclareTargetContext()) | |||
20164 | SemaRef.checkDeclIsAllowedInOpenMPTarget(E, D); | |||
20165 | ||||
20166 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) { | |||
20167 | DoMarkVarDeclReferenced(SemaRef, Loc, Var, E, RefsMinusAssignments); | |||
20168 | return; | |||
20169 | } | |||
20170 | ||||
20171 | if (BindingDecl *Decl = dyn_cast<BindingDecl>(D)) { | |||
20172 | DoMarkBindingDeclReferenced(SemaRef, Loc, Decl, E); | |||
20173 | return; | |||
20174 | } | |||
20175 | ||||
20176 | SemaRef.MarkAnyDeclReferenced(Loc, D, MightBeOdrUse); | |||
20177 | ||||
20178 | // If this is a call to a method via a cast, also mark the method in the | |||
20179 | // derived class used in case codegen can devirtualize the call. | |||
20180 | const MemberExpr *ME = dyn_cast<MemberExpr>(E); | |||
20181 | if (!ME) | |||
20182 | return; | |||
20183 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ME->getMemberDecl()); | |||
20184 | if (!MD) | |||
20185 | return; | |||
20186 | // Only attempt to devirtualize if this is truly a virtual call. | |||
20187 | bool IsVirtualCall = MD->isVirtual() && | |||
20188 | ME->performsVirtualDispatch(SemaRef.getLangOpts()); | |||
20189 | if (!IsVirtualCall) | |||
20190 | return; | |||
20191 | ||||
20192 | // If it's possible to devirtualize the call, mark the called function | |||
20193 | // referenced. | |||
20194 | CXXMethodDecl *DM = MD->getDevirtualizedMethod( | |||
20195 | ME->getBase(), SemaRef.getLangOpts().AppleKext); | |||
20196 | if (DM) | |||
20197 | SemaRef.MarkAnyDeclReferenced(Loc, DM, MightBeOdrUse); | |||
20198 | } | |||
20199 | ||||
20200 | /// Perform reference-marking and odr-use handling for a DeclRefExpr. | |||
20201 | /// | |||
20202 | /// Note, this may change the dependence of the DeclRefExpr, and so needs to be | |||
20203 | /// handled with care if the DeclRefExpr is not newly-created. | |||
20204 | void Sema::MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base) { | |||
20205 | // TODO: update this with DR# once a defect report is filed. | |||
20206 | // C++11 defect. The address of a pure member should not be an ODR use, even | |||
20207 | // if it's a qualified reference. | |||
20208 | bool OdrUse = true; | |||
20209 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(E->getDecl())) | |||
20210 | if (Method->isVirtual() && | |||
20211 | !Method->getDevirtualizedMethod(Base, getLangOpts().AppleKext)) | |||
20212 | OdrUse = false; | |||
20213 | ||||
20214 | if (auto *FD = dyn_cast<FunctionDecl>(E->getDecl())) | |||
20215 | if (!isUnevaluatedContext() && !isConstantEvaluated() && | |||
20216 | !isImmediateFunctionContext() && | |||
20217 | !isCheckingDefaultArgumentOrInitializer() && FD->isConsteval() && | |||
20218 | !RebuildingImmediateInvocation && !FD->isDependentContext()) | |||
20219 | ExprEvalContexts.back().ReferenceToConsteval.insert(E); | |||
20220 | MarkExprReferenced(*this, E->getLocation(), E->getDecl(), E, OdrUse, | |||
20221 | RefsMinusAssignments); | |||
20222 | } | |||
20223 | ||||
20224 | /// Perform reference-marking and odr-use handling for a MemberExpr. | |||
20225 | void Sema::MarkMemberReferenced(MemberExpr *E) { | |||
20226 | // C++11 [basic.def.odr]p2: | |||
20227 | // A non-overloaded function whose name appears as a potentially-evaluated | |||
20228 | // expression or a member of a set of candidate functions, if selected by | |||
20229 | // overload resolution when referred to from a potentially-evaluated | |||
20230 | // expression, is odr-used, unless it is a pure virtual function and its | |||
20231 | // name is not explicitly qualified. | |||
20232 | bool MightBeOdrUse = true; | |||
20233 | if (E->performsVirtualDispatch(getLangOpts())) { | |||
20234 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(E->getMemberDecl())) | |||
20235 | if (Method->isPure()) | |||
20236 | MightBeOdrUse = false; | |||
20237 | } | |||
20238 | SourceLocation Loc = | |||
20239 | E->getMemberLoc().isValid() ? E->getMemberLoc() : E->getBeginLoc(); | |||
20240 | MarkExprReferenced(*this, Loc, E->getMemberDecl(), E, MightBeOdrUse, | |||
20241 | RefsMinusAssignments); | |||
20242 | } | |||
20243 | ||||
20244 | /// Perform reference-marking and odr-use handling for a FunctionParmPackExpr. | |||
20245 | void Sema::MarkFunctionParmPackReferenced(FunctionParmPackExpr *E) { | |||
20246 | for (VarDecl *VD : *E) | |||
20247 | MarkExprReferenced(*this, E->getParameterPackLocation(), VD, E, true, | |||
20248 | RefsMinusAssignments); | |||
20249 | } | |||
20250 | ||||
20251 | /// Perform marking for a reference to an arbitrary declaration. It | |||
20252 | /// marks the declaration referenced, and performs odr-use checking for | |||
20253 | /// functions and variables. This method should not be used when building a | |||
20254 | /// normal expression which refers to a variable. | |||
20255 | void Sema::MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, | |||
20256 | bool MightBeOdrUse) { | |||
20257 | if (MightBeOdrUse) { | |||
20258 | if (auto *VD = dyn_cast<VarDecl>(D)) { | |||
20259 | MarkVariableReferenced(Loc, VD); | |||
20260 | return; | |||
20261 | } | |||
20262 | } | |||
20263 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
20264 | MarkFunctionReferenced(Loc, FD, MightBeOdrUse); | |||
20265 | return; | |||
20266 | } | |||
20267 | D->setReferenced(); | |||
20268 | } | |||
20269 | ||||
20270 | namespace { | |||
20271 | // Mark all of the declarations used by a type as referenced. | |||
20272 | // FIXME: Not fully implemented yet! We need to have a better understanding | |||
20273 | // of when we're entering a context we should not recurse into. | |||
20274 | // FIXME: This is and EvaluatedExprMarker are more-or-less equivalent to | |||
20275 | // TreeTransforms rebuilding the type in a new context. Rather than | |||
20276 | // duplicating the TreeTransform logic, we should consider reusing it here. | |||
20277 | // Currently that causes problems when rebuilding LambdaExprs. | |||
20278 | class MarkReferencedDecls : public RecursiveASTVisitor<MarkReferencedDecls> { | |||
20279 | Sema &S; | |||
20280 | SourceLocation Loc; | |||
20281 | ||||
20282 | public: | |||
20283 | typedef RecursiveASTVisitor<MarkReferencedDecls> Inherited; | |||
20284 | ||||
20285 | MarkReferencedDecls(Sema &S, SourceLocation Loc) : S(S), Loc(Loc) { } | |||
20286 | ||||
20287 | bool TraverseTemplateArgument(const TemplateArgument &Arg); | |||
20288 | }; | |||
20289 | } | |||
20290 | ||||
20291 | bool MarkReferencedDecls::TraverseTemplateArgument( | |||
20292 | const TemplateArgument &Arg) { | |||
20293 | { | |||
20294 | // A non-type template argument is a constant-evaluated context. | |||
20295 | EnterExpressionEvaluationContext Evaluated( | |||
20296 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); | |||
20297 | if (Arg.getKind() == TemplateArgument::Declaration) { | |||
20298 | if (Decl *D = Arg.getAsDecl()) | |||
20299 | S.MarkAnyDeclReferenced(Loc, D, true); | |||
20300 | } else if (Arg.getKind() == TemplateArgument::Expression) { | |||
20301 | S.MarkDeclarationsReferencedInExpr(Arg.getAsExpr(), false); | |||
20302 | } | |||
20303 | } | |||
20304 | ||||
20305 | return Inherited::TraverseTemplateArgument(Arg); | |||
20306 | } | |||
20307 | ||||
20308 | void Sema::MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T) { | |||
20309 | MarkReferencedDecls Marker(*this, Loc); | |||
20310 | Marker.TraverseType(T); | |||
20311 | } | |||
20312 | ||||
20313 | namespace { | |||
20314 | /// Helper class that marks all of the declarations referenced by | |||
20315 | /// potentially-evaluated subexpressions as "referenced". | |||
20316 | class EvaluatedExprMarker : public UsedDeclVisitor<EvaluatedExprMarker> { | |||
20317 | public: | |||
20318 | typedef UsedDeclVisitor<EvaluatedExprMarker> Inherited; | |||
20319 | bool SkipLocalVariables; | |||
20320 | ArrayRef<const Expr *> StopAt; | |||
20321 | ||||
20322 | EvaluatedExprMarker(Sema &S, bool SkipLocalVariables, | |||
20323 | ArrayRef<const Expr *> StopAt) | |||
20324 | : Inherited(S), SkipLocalVariables(SkipLocalVariables), StopAt(StopAt) {} | |||
20325 | ||||
20326 | void visitUsedDecl(SourceLocation Loc, Decl *D) { | |||
20327 | S.MarkFunctionReferenced(Loc, cast<FunctionDecl>(D)); | |||
20328 | } | |||
20329 | ||||
20330 | void Visit(Expr *E) { | |||
20331 | if (llvm::is_contained(StopAt, E)) | |||
20332 | return; | |||
20333 | Inherited::Visit(E); | |||
20334 | } | |||
20335 | ||||
20336 | void VisitConstantExpr(ConstantExpr *E) { | |||
20337 | // Don't mark declarations within a ConstantExpression, as this expression | |||
20338 | // will be evaluated and folded to a value. | |||
20339 | } | |||
20340 | ||||
20341 | void VisitDeclRefExpr(DeclRefExpr *E) { | |||
20342 | // If we were asked not to visit local variables, don't. | |||
20343 | if (SkipLocalVariables) { | |||
20344 | if (VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) | |||
20345 | if (VD->hasLocalStorage()) | |||
20346 | return; | |||
20347 | } | |||
20348 | ||||
20349 | // FIXME: This can trigger the instantiation of the initializer of a | |||
20350 | // variable, which can cause the expression to become value-dependent | |||
20351 | // or error-dependent. Do we need to propagate the new dependence bits? | |||
20352 | S.MarkDeclRefReferenced(E); | |||
20353 | } | |||
20354 | ||||
20355 | void VisitMemberExpr(MemberExpr *E) { | |||
20356 | S.MarkMemberReferenced(E); | |||
20357 | Visit(E->getBase()); | |||
20358 | } | |||
20359 | }; | |||
20360 | } // namespace | |||
20361 | ||||
20362 | /// Mark any declarations that appear within this expression or any | |||
20363 | /// potentially-evaluated subexpressions as "referenced". | |||
20364 | /// | |||
20365 | /// \param SkipLocalVariables If true, don't mark local variables as | |||
20366 | /// 'referenced'. | |||
20367 | /// \param StopAt Subexpressions that we shouldn't recurse into. | |||
20368 | void Sema::MarkDeclarationsReferencedInExpr(Expr *E, | |||
20369 | bool SkipLocalVariables, | |||
20370 | ArrayRef<const Expr*> StopAt) { | |||
20371 | EvaluatedExprMarker(*this, SkipLocalVariables, StopAt).Visit(E); | |||
20372 | } | |||
20373 | ||||
20374 | /// Emit a diagnostic when statements are reachable. | |||
20375 | /// FIXME: check for reachability even in expressions for which we don't build a | |||
20376 | /// CFG (eg, in the initializer of a global or in a constant expression). | |||
20377 | /// For example, | |||
20378 | /// namespace { auto *p = new double[3][false ? (1, 2) : 3]; } | |||
20379 | bool Sema::DiagIfReachable(SourceLocation Loc, ArrayRef<const Stmt *> Stmts, | |||
20380 | const PartialDiagnostic &PD) { | |||
20381 | if (!Stmts.empty() && getCurFunctionOrMethodDecl()) { | |||
20382 | if (!FunctionScopes.empty()) | |||
20383 | FunctionScopes.back()->PossiblyUnreachableDiags.push_back( | |||
20384 | sema::PossiblyUnreachableDiag(PD, Loc, Stmts)); | |||
20385 | return true; | |||
20386 | } | |||
20387 | ||||
20388 | // The initializer of a constexpr variable or of the first declaration of a | |||
20389 | // static data member is not syntactically a constant evaluated constant, | |||
20390 | // but nonetheless is always required to be a constant expression, so we | |||
20391 | // can skip diagnosing. | |||
20392 | // FIXME: Using the mangling context here is a hack. | |||
20393 | if (auto *VD = dyn_cast_or_null<VarDecl>( | |||
20394 | ExprEvalContexts.back().ManglingContextDecl)) { | |||
20395 | if (VD->isConstexpr() || | |||
20396 | (VD->isStaticDataMember() && VD->isFirstDecl() && !VD->isInline())) | |||
20397 | return false; | |||
20398 | // FIXME: For any other kind of variable, we should build a CFG for its | |||
20399 | // initializer and check whether the context in question is reachable. | |||
20400 | } | |||
20401 | ||||
20402 | Diag(Loc, PD); | |||
20403 | return true; | |||
20404 | } | |||
20405 | ||||
20406 | /// Emit a diagnostic that describes an effect on the run-time behavior | |||
20407 | /// of the program being compiled. | |||
20408 | /// | |||
20409 | /// This routine emits the given diagnostic when the code currently being | |||
20410 | /// type-checked is "potentially evaluated", meaning that there is a | |||
20411 | /// possibility that the code will actually be executable. Code in sizeof() | |||
20412 | /// expressions, code used only during overload resolution, etc., are not | |||
20413 | /// potentially evaluated. This routine will suppress such diagnostics or, | |||
20414 | /// in the absolutely nutty case of potentially potentially evaluated | |||
20415 | /// expressions (C++ typeid), queue the diagnostic to potentially emit it | |||
20416 | /// later. | |||
20417 | /// | |||
20418 | /// This routine should be used for all diagnostics that describe the run-time | |||
20419 | /// behavior of a program, such as passing a non-POD value through an ellipsis. | |||
20420 | /// Failure to do so will likely result in spurious diagnostics or failures | |||
20421 | /// during overload resolution or within sizeof/alignof/typeof/typeid. | |||
20422 | bool Sema::DiagRuntimeBehavior(SourceLocation Loc, ArrayRef<const Stmt*> Stmts, | |||
20423 | const PartialDiagnostic &PD) { | |||
20424 | ||||
20425 | if (ExprEvalContexts.back().isDiscardedStatementContext()) | |||
20426 | return false; | |||
20427 | ||||
20428 | switch (ExprEvalContexts.back().Context) { | |||
20429 | case ExpressionEvaluationContext::Unevaluated: | |||
20430 | case ExpressionEvaluationContext::UnevaluatedList: | |||
20431 | case ExpressionEvaluationContext::UnevaluatedAbstract: | |||
20432 | case ExpressionEvaluationContext::DiscardedStatement: | |||
20433 | // The argument will never be evaluated, so don't complain. | |||
20434 | break; | |||
20435 | ||||
20436 | case ExpressionEvaluationContext::ConstantEvaluated: | |||
20437 | case ExpressionEvaluationContext::ImmediateFunctionContext: | |||
20438 | // Relevant diagnostics should be produced by constant evaluation. | |||
20439 | break; | |||
20440 | ||||
20441 | case ExpressionEvaluationContext::PotentiallyEvaluated: | |||
20442 | case ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed: | |||
20443 | return DiagIfReachable(Loc, Stmts, PD); | |||
20444 | } | |||
20445 | ||||
20446 | return false; | |||
20447 | } | |||
20448 | ||||
20449 | bool Sema::DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, | |||
20450 | const PartialDiagnostic &PD) { | |||
20451 | return DiagRuntimeBehavior( | |||
20452 | Loc, Statement ? llvm::ArrayRef(Statement) : std::nullopt, PD); | |||
20453 | } | |||
20454 | ||||
20455 | bool Sema::CheckCallReturnType(QualType ReturnType, SourceLocation Loc, | |||
20456 | CallExpr *CE, FunctionDecl *FD) { | |||
20457 | if (ReturnType->isVoidType() || !ReturnType->isIncompleteType()) | |||
20458 | return false; | |||
20459 | ||||
20460 | // If we're inside a decltype's expression, don't check for a valid return | |||
20461 | // type or construct temporaries until we know whether this is the last call. | |||
20462 | if (ExprEvalContexts.back().ExprContext == | |||
20463 | ExpressionEvaluationContextRecord::EK_Decltype) { | |||
20464 | ExprEvalContexts.back().DelayedDecltypeCalls.push_back(CE); | |||
20465 | return false; | |||
20466 | } | |||
20467 | ||||
20468 | class CallReturnIncompleteDiagnoser : public TypeDiagnoser { | |||
20469 | FunctionDecl *FD; | |||
20470 | CallExpr *CE; | |||
20471 | ||||
20472 | public: | |||
20473 | CallReturnIncompleteDiagnoser(FunctionDecl *FD, CallExpr *CE) | |||
20474 | : FD(FD), CE(CE) { } | |||
20475 | ||||
20476 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { | |||
20477 | if (!FD) { | |||
20478 | S.Diag(Loc, diag::err_call_incomplete_return) | |||
20479 | << T << CE->getSourceRange(); | |||
20480 | return; | |||
20481 | } | |||
20482 | ||||
20483 | S.Diag(Loc, diag::err_call_function_incomplete_return) | |||
20484 | << CE->getSourceRange() << FD << T; | |||
20485 | S.Diag(FD->getLocation(), diag::note_entity_declared_at) | |||
20486 | << FD->getDeclName(); | |||
20487 | } | |||
20488 | } Diagnoser(FD, CE); | |||
20489 | ||||
20490 | if (RequireCompleteType(Loc, ReturnType, Diagnoser)) | |||
20491 | return true; | |||
20492 | ||||
20493 | return false; | |||
20494 | } | |||
20495 | ||||
20496 | // Diagnose the s/=/==/ and s/\|=/!=/ typos. Note that adding parentheses | |||
20497 | // will prevent this condition from triggering, which is what we want. | |||
20498 | void Sema::DiagnoseAssignmentAsCondition(Expr *E) { | |||
20499 | SourceLocation Loc; | |||
20500 | ||||
20501 | unsigned diagnostic = diag::warn_condition_is_assignment; | |||
20502 | bool IsOrAssign = false; | |||
20503 | ||||
20504 | if (BinaryOperator *Op = dyn_cast<BinaryOperator>(E)) { | |||
20505 | if (Op->getOpcode() != BO_Assign && Op->getOpcode() != BO_OrAssign) | |||
20506 | return; | |||
20507 | ||||
20508 | IsOrAssign = Op->getOpcode() == BO_OrAssign; | |||
20509 | ||||
20510 | // Greylist some idioms by putting them into a warning subcategory. | |||
20511 | if (ObjCMessageExpr *ME | |||
20512 | = dyn_cast<ObjCMessageExpr>(Op->getRHS()->IgnoreParenCasts())) { | |||
20513 | Selector Sel = ME->getSelector(); | |||
20514 | ||||
20515 | // self = [<foo> init...] | |||
20516 | if (isSelfExpr(Op->getLHS()) && ME->getMethodFamily() == OMF_init) | |||
20517 | diagnostic = diag::warn_condition_is_idiomatic_assignment; | |||
20518 | ||||
20519 | // <foo> = [<bar> nextObject] | |||
20520 | else if (Sel.isUnarySelector() && Sel.getNameForSlot(0) == "nextObject") | |||
20521 | diagnostic = diag::warn_condition_is_idiomatic_assignment; | |||
20522 | } | |||
20523 | ||||
20524 | Loc = Op->getOperatorLoc(); | |||
20525 | } else if (CXXOperatorCallExpr *Op = dyn_cast<CXXOperatorCallExpr>(E)) { | |||
20526 | if (Op->getOperator() != OO_Equal && Op->getOperator() != OO_PipeEqual) | |||
20527 | return; | |||
20528 | ||||
20529 | IsOrAssign = Op->getOperator() == OO_PipeEqual; | |||
20530 | Loc = Op->getOperatorLoc(); | |||
20531 | } else if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) | |||
20532 | return DiagnoseAssignmentAsCondition(POE->getSyntacticForm()); | |||
20533 | else { | |||
20534 | // Not an assignment. | |||
20535 | return; | |||
20536 | } | |||
20537 | ||||
20538 | Diag(Loc, diagnostic) << E->getSourceRange(); | |||
20539 | ||||
20540 | SourceLocation Open = E->getBeginLoc(); | |||
20541 | SourceLocation Close = getLocForEndOfToken(E->getSourceRange().getEnd()); | |||
20542 | Diag(Loc, diag::note_condition_assign_silence) | |||
20543 | << FixItHint::CreateInsertion(Open, "(") | |||
20544 | << FixItHint::CreateInsertion(Close, ")"); | |||
20545 | ||||
20546 | if (IsOrAssign) | |||
20547 | Diag(Loc, diag::note_condition_or_assign_to_comparison) | |||
20548 | << FixItHint::CreateReplacement(Loc, "!="); | |||
20549 | else | |||
20550 | Diag(Loc, diag::note_condition_assign_to_comparison) | |||
20551 | << FixItHint::CreateReplacement(Loc, "=="); | |||
20552 | } | |||
20553 | ||||
20554 | /// Redundant parentheses over an equality comparison can indicate | |||
20555 | /// that the user intended an assignment used as condition. | |||
20556 | void Sema::DiagnoseEqualityWithExtraParens(ParenExpr *ParenE) { | |||
20557 | // Don't warn if the parens came from a macro. | |||
20558 | SourceLocation parenLoc = ParenE->getBeginLoc(); | |||
20559 | if (parenLoc.isInvalid() || parenLoc.isMacroID()) | |||
20560 | return; | |||
20561 | // Don't warn for dependent expressions. | |||
20562 | if (ParenE->isTypeDependent()) | |||
20563 | return; | |||
20564 | ||||
20565 | Expr *E = ParenE->IgnoreParens(); | |||
20566 | ||||
20567 | if (BinaryOperator *opE = dyn_cast<BinaryOperator>(E)) | |||
20568 | if (opE->getOpcode() == BO_EQ && | |||
20569 | opE->getLHS()->IgnoreParenImpCasts()->isModifiableLvalue(Context) | |||
20570 | == Expr::MLV_Valid) { | |||
20571 | SourceLocation Loc = opE->getOperatorLoc(); | |||
20572 | ||||
20573 | Diag(Loc, diag::warn_equality_with_extra_parens) << E->getSourceRange(); | |||
20574 | SourceRange ParenERange = ParenE->getSourceRange(); | |||
20575 | Diag(Loc, diag::note_equality_comparison_silence) | |||
20576 | << FixItHint::CreateRemoval(ParenERange.getBegin()) | |||
20577 | << FixItHint::CreateRemoval(ParenERange.getEnd()); | |||
20578 | Diag(Loc, diag::note_equality_comparison_to_assign) | |||
20579 | << FixItHint::CreateReplacement(Loc, "="); | |||
20580 | } | |||
20581 | } | |||
20582 | ||||
20583 | ExprResult Sema::CheckBooleanCondition(SourceLocation Loc, Expr *E, | |||
20584 | bool IsConstexpr) { | |||
20585 | DiagnoseAssignmentAsCondition(E); | |||
20586 | if (ParenExpr *parenE = dyn_cast<ParenExpr>(E)) | |||
20587 | DiagnoseEqualityWithExtraParens(parenE); | |||
20588 | ||||
20589 | ExprResult result = CheckPlaceholderExpr(E); | |||
20590 | if (result.isInvalid()) return ExprError(); | |||
20591 | E = result.get(); | |||
20592 | ||||
20593 | if (!E->isTypeDependent()) { | |||
20594 | if (getLangOpts().CPlusPlus) | |||
20595 | return CheckCXXBooleanCondition(E, IsConstexpr); // C++ 6.4p4 | |||
20596 | ||||
20597 | ExprResult ERes = DefaultFunctionArrayLvalueConversion(E); | |||
20598 | if (ERes.isInvalid()) | |||
20599 | return ExprError(); | |||
20600 | E = ERes.get(); | |||
20601 | ||||
20602 | QualType T = E->getType(); | |||
20603 | if (!T->isScalarType()) { // C99 6.8.4.1p1 | |||
20604 | Diag(Loc, diag::err_typecheck_statement_requires_scalar) | |||
20605 | << T << E->getSourceRange(); | |||
20606 | return ExprError(); | |||
20607 | } | |||
20608 | CheckBoolLikeConversion(E, Loc); | |||
20609 | } | |||
20610 | ||||
20611 | return E; | |||
20612 | } | |||
20613 | ||||
20614 | Sema::ConditionResult Sema::ActOnCondition(Scope *S, SourceLocation Loc, | |||
20615 | Expr *SubExpr, ConditionKind CK, | |||
20616 | bool MissingOK) { | |||
20617 | // MissingOK indicates whether having no condition expression is valid | |||
20618 | // (for loop) or invalid (e.g. while loop). | |||
20619 | if (!SubExpr) | |||
20620 | return MissingOK ? ConditionResult() : ConditionError(); | |||
20621 | ||||
20622 | ExprResult Cond; | |||
20623 | switch (CK) { | |||
20624 | case ConditionKind::Boolean: | |||
20625 | Cond = CheckBooleanCondition(Loc, SubExpr); | |||
20626 | break; | |||
20627 | ||||
20628 | case ConditionKind::ConstexprIf: | |||
20629 | Cond = CheckBooleanCondition(Loc, SubExpr, true); | |||
20630 | break; | |||
20631 | ||||
20632 | case ConditionKind::Switch: | |||
20633 | Cond = CheckSwitchCondition(Loc, SubExpr); | |||
20634 | break; | |||
20635 | } | |||
20636 | if (Cond.isInvalid()) { | |||
20637 | Cond = CreateRecoveryExpr(SubExpr->getBeginLoc(), SubExpr->getEndLoc(), | |||
20638 | {SubExpr}, PreferredConditionType(CK)); | |||
20639 | if (!Cond.get()) | |||
20640 | return ConditionError(); | |||
20641 | } | |||
20642 | // FIXME: FullExprArg doesn't have an invalid bit, so check nullness instead. | |||
20643 | FullExprArg FullExpr = MakeFullExpr(Cond.get(), Loc); | |||
20644 | if (!FullExpr.get()) | |||
20645 | return ConditionError(); | |||
20646 | ||||
20647 | return ConditionResult(*this, nullptr, FullExpr, | |||
20648 | CK == ConditionKind::ConstexprIf); | |||
20649 | } | |||
20650 | ||||
20651 | namespace { | |||
20652 | /// A visitor for rebuilding a call to an __unknown_any expression | |||
20653 | /// to have an appropriate type. | |||
20654 | struct RebuildUnknownAnyFunction | |||
20655 | : StmtVisitor<RebuildUnknownAnyFunction, ExprResult> { | |||
20656 | ||||
20657 | Sema &S; | |||
20658 | ||||
20659 | RebuildUnknownAnyFunction(Sema &S) : S(S) {} | |||
20660 | ||||
20661 | ExprResult VisitStmt(Stmt *S) { | |||
20662 | llvm_unreachable("unexpected statement!")::llvm::llvm_unreachable_internal("unexpected statement!", "clang/lib/Sema/SemaExpr.cpp" , 20662); | |||
20663 | } | |||
20664 | ||||
20665 | ExprResult VisitExpr(Expr *E) { | |||
20666 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_call) | |||
20667 | << E->getSourceRange(); | |||
20668 | return ExprError(); | |||
20669 | } | |||
20670 | ||||
20671 | /// Rebuild an expression which simply semantically wraps another | |||
20672 | /// expression which it shares the type and value kind of. | |||
20673 | template <class T> ExprResult rebuildSugarExpr(T *E) { | |||
20674 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
20675 | if (SubResult.isInvalid()) return ExprError(); | |||
20676 | ||||
20677 | Expr *SubExpr = SubResult.get(); | |||
20678 | E->setSubExpr(SubExpr); | |||
20679 | E->setType(SubExpr->getType()); | |||
20680 | E->setValueKind(SubExpr->getValueKind()); | |||
20681 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20681, __extension__ __PRETTY_FUNCTION__ )); | |||
20682 | return E; | |||
20683 | } | |||
20684 | ||||
20685 | ExprResult VisitParenExpr(ParenExpr *E) { | |||
20686 | return rebuildSugarExpr(E); | |||
20687 | } | |||
20688 | ||||
20689 | ExprResult VisitUnaryExtension(UnaryOperator *E) { | |||
20690 | return rebuildSugarExpr(E); | |||
20691 | } | |||
20692 | ||||
20693 | ExprResult VisitUnaryAddrOf(UnaryOperator *E) { | |||
20694 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
20695 | if (SubResult.isInvalid()) return ExprError(); | |||
20696 | ||||
20697 | Expr *SubExpr = SubResult.get(); | |||
20698 | E->setSubExpr(SubExpr); | |||
20699 | E->setType(S.Context.getPointerType(SubExpr->getType())); | |||
20700 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "clang/lib/Sema/SemaExpr.cpp", 20700, __extension__ __PRETTY_FUNCTION__)); | |||
20701 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20701, __extension__ __PRETTY_FUNCTION__ )); | |||
20702 | return E; | |||
20703 | } | |||
20704 | ||||
20705 | ExprResult resolveDecl(Expr *E, ValueDecl *VD) { | |||
20706 | if (!isa<FunctionDecl>(VD)) return VisitExpr(E); | |||
20707 | ||||
20708 | E->setType(VD->getType()); | |||
20709 | ||||
20710 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "clang/lib/Sema/SemaExpr.cpp", 20710, __extension__ __PRETTY_FUNCTION__)); | |||
20711 | if (S.getLangOpts().CPlusPlus && | |||
20712 | !(isa<CXXMethodDecl>(VD) && | |||
20713 | cast<CXXMethodDecl>(VD)->isInstance())) | |||
20714 | E->setValueKind(VK_LValue); | |||
20715 | ||||
20716 | return E; | |||
20717 | } | |||
20718 | ||||
20719 | ExprResult VisitMemberExpr(MemberExpr *E) { | |||
20720 | return resolveDecl(E, E->getMemberDecl()); | |||
20721 | } | |||
20722 | ||||
20723 | ExprResult VisitDeclRefExpr(DeclRefExpr *E) { | |||
20724 | return resolveDecl(E, E->getDecl()); | |||
20725 | } | |||
20726 | }; | |||
20727 | } | |||
20728 | ||||
20729 | /// Given a function expression of unknown-any type, try to rebuild it | |||
20730 | /// to have a function type. | |||
20731 | static ExprResult rebuildUnknownAnyFunction(Sema &S, Expr *FunctionExpr) { | |||
20732 | ExprResult Result = RebuildUnknownAnyFunction(S).Visit(FunctionExpr); | |||
20733 | if (Result.isInvalid()) return ExprError(); | |||
20734 | return S.DefaultFunctionArrayConversion(Result.get()); | |||
20735 | } | |||
20736 | ||||
20737 | namespace { | |||
20738 | /// A visitor for rebuilding an expression of type __unknown_anytype | |||
20739 | /// into one which resolves the type directly on the referring | |||
20740 | /// expression. Strict preservation of the original source | |||
20741 | /// structure is not a goal. | |||
20742 | struct RebuildUnknownAnyExpr | |||
20743 | : StmtVisitor<RebuildUnknownAnyExpr, ExprResult> { | |||
20744 | ||||
20745 | Sema &S; | |||
20746 | ||||
20747 | /// The current destination type. | |||
20748 | QualType DestType; | |||
20749 | ||||
20750 | RebuildUnknownAnyExpr(Sema &S, QualType CastType) | |||
20751 | : S(S), DestType(CastType) {} | |||
20752 | ||||
20753 | ExprResult VisitStmt(Stmt *S) { | |||
20754 | llvm_unreachable("unexpected statement!")::llvm::llvm_unreachable_internal("unexpected statement!", "clang/lib/Sema/SemaExpr.cpp" , 20754); | |||
20755 | } | |||
20756 | ||||
20757 | ExprResult VisitExpr(Expr *E) { | |||
20758 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr) | |||
20759 | << E->getSourceRange(); | |||
20760 | return ExprError(); | |||
20761 | } | |||
20762 | ||||
20763 | ExprResult VisitCallExpr(CallExpr *E); | |||
20764 | ExprResult VisitObjCMessageExpr(ObjCMessageExpr *E); | |||
20765 | ||||
20766 | /// Rebuild an expression which simply semantically wraps another | |||
20767 | /// expression which it shares the type and value kind of. | |||
20768 | template <class T> ExprResult rebuildSugarExpr(T *E) { | |||
20769 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
20770 | if (SubResult.isInvalid()) return ExprError(); | |||
20771 | Expr *SubExpr = SubResult.get(); | |||
20772 | E->setSubExpr(SubExpr); | |||
20773 | E->setType(SubExpr->getType()); | |||
20774 | E->setValueKind(SubExpr->getValueKind()); | |||
20775 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20775, __extension__ __PRETTY_FUNCTION__ )); | |||
20776 | return E; | |||
20777 | } | |||
20778 | ||||
20779 | ExprResult VisitParenExpr(ParenExpr *E) { | |||
20780 | return rebuildSugarExpr(E); | |||
20781 | } | |||
20782 | ||||
20783 | ExprResult VisitUnaryExtension(UnaryOperator *E) { | |||
20784 | return rebuildSugarExpr(E); | |||
20785 | } | |||
20786 | ||||
20787 | ExprResult VisitUnaryAddrOf(UnaryOperator *E) { | |||
20788 | const PointerType *Ptr = DestType->getAs<PointerType>(); | |||
20789 | if (!Ptr) { | |||
20790 | S.Diag(E->getOperatorLoc(), diag::err_unknown_any_addrof) | |||
20791 | << E->getSourceRange(); | |||
20792 | return ExprError(); | |||
20793 | } | |||
20794 | ||||
20795 | if (isa<CallExpr>(E->getSubExpr())) { | |||
20796 | S.Diag(E->getOperatorLoc(), diag::err_unknown_any_addrof_call) | |||
20797 | << E->getSourceRange(); | |||
20798 | return ExprError(); | |||
20799 | } | |||
20800 | ||||
20801 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "clang/lib/Sema/SemaExpr.cpp", 20801, __extension__ __PRETTY_FUNCTION__)); | |||
20802 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20802, __extension__ __PRETTY_FUNCTION__ )); | |||
20803 | E->setType(DestType); | |||
20804 | ||||
20805 | // Build the sub-expression as if it were an object of the pointee type. | |||
20806 | DestType = Ptr->getPointeeType(); | |||
20807 | ExprResult SubResult = Visit(E->getSubExpr()); | |||
20808 | if (SubResult.isInvalid()) return ExprError(); | |||
20809 | E->setSubExpr(SubResult.get()); | |||
20810 | return E; | |||
20811 | } | |||
20812 | ||||
20813 | ExprResult VisitImplicitCastExpr(ImplicitCastExpr *E); | |||
20814 | ||||
20815 | ExprResult resolveDecl(Expr *E, ValueDecl *VD); | |||
20816 | ||||
20817 | ExprResult VisitMemberExpr(MemberExpr *E) { | |||
20818 | return resolveDecl(E, E->getMemberDecl()); | |||
20819 | } | |||
20820 | ||||
20821 | ExprResult VisitDeclRefExpr(DeclRefExpr *E) { | |||
20822 | return resolveDecl(E, E->getDecl()); | |||
20823 | } | |||
20824 | }; | |||
20825 | } | |||
20826 | ||||
20827 | /// Rebuilds a call expression which yielded __unknown_anytype. | |||
20828 | ExprResult RebuildUnknownAnyExpr::VisitCallExpr(CallExpr *E) { | |||
20829 | Expr *CalleeExpr = E->getCallee(); | |||
20830 | ||||
20831 | enum FnKind { | |||
20832 | FK_MemberFunction, | |||
20833 | FK_FunctionPointer, | |||
20834 | FK_BlockPointer | |||
20835 | }; | |||
20836 | ||||
20837 | FnKind Kind; | |||
20838 | QualType CalleeType = CalleeExpr->getType(); | |||
20839 | if (CalleeType == S.Context.BoundMemberTy) { | |||
20840 | 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)" , "clang/lib/Sema/SemaExpr.cpp", 20840, __extension__ __PRETTY_FUNCTION__ )); | |||
20841 | Kind = FK_MemberFunction; | |||
20842 | CalleeType = Expr::findBoundMemberType(CalleeExpr); | |||
20843 | } else if (const PointerType *Ptr = CalleeType->getAs<PointerType>()) { | |||
20844 | CalleeType = Ptr->getPointeeType(); | |||
20845 | Kind = FK_FunctionPointer; | |||
20846 | } else { | |||
20847 | CalleeType = CalleeType->castAs<BlockPointerType>()->getPointeeType(); | |||
20848 | Kind = FK_BlockPointer; | |||
20849 | } | |||
20850 | const FunctionType *FnType = CalleeType->castAs<FunctionType>(); | |||
20851 | ||||
20852 | // Verify that this is a legal result type of a function. | |||
20853 | if (DestType->isArrayType() || DestType->isFunctionType()) { | |||
20854 | unsigned diagID = diag::err_func_returning_array_function; | |||
20855 | if (Kind == FK_BlockPointer) | |||
20856 | diagID = diag::err_block_returning_array_function; | |||
20857 | ||||
20858 | S.Diag(E->getExprLoc(), diagID) | |||
20859 | << DestType->isFunctionType() << DestType; | |||
20860 | return ExprError(); | |||
20861 | } | |||
20862 | ||||
20863 | // Otherwise, go ahead and set DestType as the call's result. | |||
20864 | E->setType(DestType.getNonLValueExprType(S.Context)); | |||
20865 | E->setValueKind(Expr::getValueKindForType(DestType)); | |||
20866 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20866, __extension__ __PRETTY_FUNCTION__ )); | |||
20867 | ||||
20868 | // Rebuild the function type, replacing the result type with DestType. | |||
20869 | const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FnType); | |||
20870 | if (Proto) { | |||
20871 | // __unknown_anytype(...) is a special case used by the debugger when | |||
20872 | // it has no idea what a function's signature is. | |||
20873 | // | |||
20874 | // We want to build this call essentially under the K&R | |||
20875 | // unprototyped rules, but making a FunctionNoProtoType in C++ | |||
20876 | // would foul up all sorts of assumptions. However, we cannot | |||
20877 | // simply pass all arguments as variadic arguments, nor can we | |||
20878 | // portably just call the function under a non-variadic type; see | |||
20879 | // the comment on IR-gen's TargetInfo::isNoProtoCallVariadic. | |||
20880 | // However, it turns out that in practice it is generally safe to | |||
20881 | // call a function declared as "A foo(B,C,D);" under the prototype | |||
20882 | // "A foo(B,C,D,...);". The only known exception is with the | |||
20883 | // Windows ABI, where any variadic function is implicitly cdecl | |||
20884 | // regardless of its normal CC. Therefore we change the parameter | |||
20885 | // types to match the types of the arguments. | |||
20886 | // | |||
20887 | // This is a hack, but it is far superior to moving the | |||
20888 | // corresponding target-specific code from IR-gen to Sema/AST. | |||
20889 | ||||
20890 | ArrayRef<QualType> ParamTypes = Proto->getParamTypes(); | |||
20891 | SmallVector<QualType, 8> ArgTypes; | |||
20892 | if (ParamTypes.empty() && Proto->isVariadic()) { // the special case | |||
20893 | ArgTypes.reserve(E->getNumArgs()); | |||
20894 | for (unsigned i = 0, e = E->getNumArgs(); i != e; ++i) { | |||
20895 | ArgTypes.push_back(S.Context.getReferenceQualifiedType(E->getArg(i))); | |||
20896 | } | |||
20897 | ParamTypes = ArgTypes; | |||
20898 | } | |||
20899 | DestType = S.Context.getFunctionType(DestType, ParamTypes, | |||
20900 | Proto->getExtProtoInfo()); | |||
20901 | } else { | |||
20902 | DestType = S.Context.getFunctionNoProtoType(DestType, | |||
20903 | FnType->getExtInfo()); | |||
20904 | } | |||
20905 | ||||
20906 | // Rebuild the appropriate pointer-to-function type. | |||
20907 | switch (Kind) { | |||
20908 | case FK_MemberFunction: | |||
20909 | // Nothing to do. | |||
20910 | break; | |||
20911 | ||||
20912 | case FK_FunctionPointer: | |||
20913 | DestType = S.Context.getPointerType(DestType); | |||
20914 | break; | |||
20915 | ||||
20916 | case FK_BlockPointer: | |||
20917 | DestType = S.Context.getBlockPointerType(DestType); | |||
20918 | break; | |||
20919 | } | |||
20920 | ||||
20921 | // Finally, we can recurse. | |||
20922 | ExprResult CalleeResult = Visit(CalleeExpr); | |||
20923 | if (!CalleeResult.isUsable()) return ExprError(); | |||
20924 | E->setCallee(CalleeResult.get()); | |||
20925 | ||||
20926 | // Bind a temporary if necessary. | |||
20927 | return S.MaybeBindToTemporary(E); | |||
20928 | } | |||
20929 | ||||
20930 | ExprResult RebuildUnknownAnyExpr::VisitObjCMessageExpr(ObjCMessageExpr *E) { | |||
20931 | // Verify that this is a legal result type of a call. | |||
20932 | if (DestType->isArrayType() || DestType->isFunctionType()) { | |||
20933 | S.Diag(E->getExprLoc(), diag::err_func_returning_array_function) | |||
20934 | << DestType->isFunctionType() << DestType; | |||
20935 | return ExprError(); | |||
20936 | } | |||
20937 | ||||
20938 | // Rewrite the method result type if available. | |||
20939 | if (ObjCMethodDecl *Method = E->getMethodDecl()) { | |||
20940 | assert(Method->getReturnType() == S.Context.UnknownAnyTy)(static_cast <bool> (Method->getReturnType() == S.Context .UnknownAnyTy) ? void (0) : __assert_fail ("Method->getReturnType() == S.Context.UnknownAnyTy" , "clang/lib/Sema/SemaExpr.cpp", 20940, __extension__ __PRETTY_FUNCTION__ )); | |||
20941 | Method->setReturnType(DestType); | |||
20942 | } | |||
20943 | ||||
20944 | // Change the type of the message. | |||
20945 | E->setType(DestType.getNonReferenceType()); | |||
20946 | E->setValueKind(Expr::getValueKindForType(DestType)); | |||
20947 | ||||
20948 | return S.MaybeBindToTemporary(E); | |||
20949 | } | |||
20950 | ||||
20951 | ExprResult RebuildUnknownAnyExpr::VisitImplicitCastExpr(ImplicitCastExpr *E) { | |||
20952 | // The only case we should ever see here is a function-to-pointer decay. | |||
20953 | if (E->getCastKind() == CK_FunctionToPointerDecay) { | |||
20954 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "clang/lib/Sema/SemaExpr.cpp", 20954, __extension__ __PRETTY_FUNCTION__)); | |||
20955 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20955, __extension__ __PRETTY_FUNCTION__ )); | |||
20956 | ||||
20957 | E->setType(DestType); | |||
20958 | ||||
20959 | // Rebuild the sub-expression as the pointee (function) type. | |||
20960 | DestType = DestType->castAs<PointerType>()->getPointeeType(); | |||
20961 | ||||
20962 | ExprResult Result = Visit(E->getSubExpr()); | |||
20963 | if (!Result.isUsable()) return ExprError(); | |||
20964 | ||||
20965 | E->setSubExpr(Result.get()); | |||
20966 | return E; | |||
20967 | } else if (E->getCastKind() == CK_LValueToRValue) { | |||
20968 | assert(E->isPRValue())(static_cast <bool> (E->isPRValue()) ? void (0) : __assert_fail ("E->isPRValue()", "clang/lib/Sema/SemaExpr.cpp", 20968, __extension__ __PRETTY_FUNCTION__)); | |||
20969 | assert(E->getObjectKind() == OK_Ordinary)(static_cast <bool> (E->getObjectKind() == OK_Ordinary ) ? void (0) : __assert_fail ("E->getObjectKind() == OK_Ordinary" , "clang/lib/Sema/SemaExpr.cpp", 20969, __extension__ __PRETTY_FUNCTION__ )); | |||
20970 | ||||
20971 | assert(isa<BlockPointerType>(E->getType()))(static_cast <bool> (isa<BlockPointerType>(E-> getType())) ? void (0) : __assert_fail ("isa<BlockPointerType>(E->getType())" , "clang/lib/Sema/SemaExpr.cpp", 20971, __extension__ __PRETTY_FUNCTION__ )); | |||
20972 | ||||
20973 | E->setType(DestType); | |||
20974 | ||||
20975 | // The sub-expression has to be a lvalue reference, so rebuild it as such. | |||
20976 | DestType = S.Context.getLValueReferenceType(DestType); | |||
20977 | ||||
20978 | ExprResult Result = Visit(E->getSubExpr()); | |||
20979 | if (!Result.isUsable()) return ExprError(); | |||
20980 | ||||
20981 | E->setSubExpr(Result.get()); | |||
20982 | return E; | |||
20983 | } else { | |||
20984 | llvm_unreachable("Unhandled cast type!")::llvm::llvm_unreachable_internal("Unhandled cast type!", "clang/lib/Sema/SemaExpr.cpp" , 20984); | |||
20985 | } | |||
20986 | } | |||
20987 | ||||
20988 | ExprResult RebuildUnknownAnyExpr::resolveDecl(Expr *E, ValueDecl *VD) { | |||
20989 | ExprValueKind ValueKind = VK_LValue; | |||
20990 | QualType Type = DestType; | |||
20991 | ||||
20992 | // We know how to make this work for certain kinds of decls: | |||
20993 | ||||
20994 | // - functions | |||
20995 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(VD)) { | |||
20996 | if (const PointerType *Ptr = Type->getAs<PointerType>()) { | |||
20997 | DestType = Ptr->getPointeeType(); | |||
20998 | ExprResult Result = resolveDecl(E, VD); | |||
20999 | if (Result.isInvalid()) return ExprError(); | |||
21000 | return S.ImpCastExprToType(Result.get(), Type, CK_FunctionToPointerDecay, | |||
21001 | VK_PRValue); | |||
21002 | } | |||
21003 | ||||
21004 | if (!Type->isFunctionType()) { | |||
21005 | S.Diag(E->getExprLoc(), diag::err_unknown_any_function) | |||
21006 | << VD << E->getSourceRange(); | |||
21007 | return ExprError(); | |||
21008 | } | |||
21009 | if (const FunctionProtoType *FT = Type->getAs<FunctionProtoType>()) { | |||
21010 | // We must match the FunctionDecl's type to the hack introduced in | |||
21011 | // RebuildUnknownAnyExpr::VisitCallExpr to vararg functions of unknown | |||
21012 | // type. See the lengthy commentary in that routine. | |||
21013 | QualType FDT = FD->getType(); | |||
21014 | const FunctionType *FnType = FDT->castAs<FunctionType>(); | |||
21015 | const FunctionProtoType *Proto = dyn_cast_or_null<FunctionProtoType>(FnType); | |||
21016 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
21017 | if (DRE && Proto && Proto->getParamTypes().empty() && Proto->isVariadic()) { | |||
21018 | SourceLocation Loc = FD->getLocation(); | |||
21019 | FunctionDecl *NewFD = FunctionDecl::Create( | |||
21020 | S.Context, FD->getDeclContext(), Loc, Loc, | |||
21021 | FD->getNameInfo().getName(), DestType, FD->getTypeSourceInfo(), | |||
21022 | SC_None, S.getCurFPFeatures().isFPConstrained(), | |||
21023 | false /*isInlineSpecified*/, FD->hasPrototype(), | |||
21024 | /*ConstexprKind*/ ConstexprSpecKind::Unspecified); | |||
21025 | ||||
21026 | if (FD->getQualifier()) | |||
21027 | NewFD->setQualifierInfo(FD->getQualifierLoc()); | |||
21028 | ||||
21029 | SmallVector<ParmVarDecl*, 16> Params; | |||
21030 | for (const auto &AI : FT->param_types()) { | |||
21031 | ParmVarDecl *Param = | |||
21032 | S.BuildParmVarDeclForTypedef(FD, Loc, AI); | |||
21033 | Param->setScopeInfo(0, Params.size()); | |||
21034 | Params.push_back(Param); | |||
21035 | } | |||
21036 | NewFD->setParams(Params); | |||
21037 | DRE->setDecl(NewFD); | |||
21038 | VD = DRE->getDecl(); | |||
21039 | } | |||
21040 | } | |||
21041 | ||||
21042 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
21043 | if (MD->isInstance()) { | |||
21044 | ValueKind = VK_PRValue; | |||
21045 | Type = S.Context.BoundMemberTy; | |||
21046 | } | |||
21047 | ||||
21048 | // Function references aren't l-values in C. | |||
21049 | if (!S.getLangOpts().CPlusPlus) | |||
21050 | ValueKind = VK_PRValue; | |||
21051 | ||||
21052 | // - variables | |||
21053 | } else if (isa<VarDecl>(VD)) { | |||
21054 | if (const ReferenceType *RefTy = Type->getAs<ReferenceType>()) { | |||
21055 | Type = RefTy->getPointeeType(); | |||
21056 | } else if (Type->isFunctionType()) { | |||
21057 | S.Diag(E->getExprLoc(), diag::err_unknown_any_var_function_type) | |||
21058 | << VD << E->getSourceRange(); | |||
21059 | return ExprError(); | |||
21060 | } | |||
21061 | ||||
21062 | // - nothing else | |||
21063 | } else { | |||
21064 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_decl) | |||
21065 | << VD << E->getSourceRange(); | |||
21066 | return ExprError(); | |||
21067 | } | |||
21068 | ||||
21069 | // Modifying the declaration like this is friendly to IR-gen but | |||
21070 | // also really dangerous. | |||
21071 | VD->setType(DestType); | |||
21072 | E->setType(Type); | |||
21073 | E->setValueKind(ValueKind); | |||
21074 | return E; | |||
21075 | } | |||
21076 | ||||
21077 | /// Check a cast of an unknown-any type. We intentionally only | |||
21078 | /// trigger this for C-style casts. | |||
21079 | ExprResult Sema::checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, | |||
21080 | Expr *CastExpr, CastKind &CastKind, | |||
21081 | ExprValueKind &VK, CXXCastPath &Path) { | |||
21082 | // The type we're casting to must be either void or complete. | |||
21083 | if (!CastType->isVoidType() && | |||
21084 | RequireCompleteType(TypeRange.getBegin(), CastType, | |||
21085 | diag::err_typecheck_cast_to_incomplete)) | |||
21086 | return ExprError(); | |||
21087 | ||||
21088 | // Rewrite the casted expression from scratch. | |||
21089 | ExprResult result = RebuildUnknownAnyExpr(*this, CastType).Visit(CastExpr); | |||
21090 | if (!result.isUsable()) return ExprError(); | |||
21091 | ||||
21092 | CastExpr = result.get(); | |||
21093 | VK = CastExpr->getValueKind(); | |||
21094 | CastKind = CK_NoOp; | |||
21095 | ||||
21096 | return CastExpr; | |||
21097 | } | |||
21098 | ||||
21099 | ExprResult Sema::forceUnknownAnyToType(Expr *E, QualType ToType) { | |||
21100 | return RebuildUnknownAnyExpr(*this, ToType).Visit(E); | |||
21101 | } | |||
21102 | ||||
21103 | ExprResult Sema::checkUnknownAnyArg(SourceLocation callLoc, | |||
21104 | Expr *arg, QualType ¶mType) { | |||
21105 | // If the syntactic form of the argument is not an explicit cast of | |||
21106 | // any sort, just do default argument promotion. | |||
21107 | ExplicitCastExpr *castArg = dyn_cast<ExplicitCastExpr>(arg->IgnoreParens()); | |||
21108 | if (!castArg) { | |||
21109 | ExprResult result = DefaultArgumentPromotion(arg); | |||
21110 | if (result.isInvalid()) return ExprError(); | |||
21111 | paramType = result.get()->getType(); | |||
21112 | return result; | |||
21113 | } | |||
21114 | ||||
21115 | // Otherwise, use the type that was written in the explicit cast. | |||
21116 | assert(!arg->hasPlaceholderType())(static_cast <bool> (!arg->hasPlaceholderType()) ? void (0) : __assert_fail ("!arg->hasPlaceholderType()", "clang/lib/Sema/SemaExpr.cpp" , 21116, __extension__ __PRETTY_FUNCTION__)); | |||
21117 | paramType = castArg->getTypeAsWritten(); | |||
21118 | ||||
21119 | // Copy-initialize a parameter of that type. | |||
21120 | InitializedEntity entity = | |||
21121 | InitializedEntity::InitializeParameter(Context, paramType, | |||
21122 | /*consumed*/ false); | |||
21123 | return PerformCopyInitialization(entity, callLoc, arg); | |||
21124 | } | |||
21125 | ||||
21126 | static ExprResult diagnoseUnknownAnyExpr(Sema &S, Expr *E) { | |||
21127 | Expr *orig = E; | |||
21128 | unsigned diagID = diag::err_uncasted_use_of_unknown_any; | |||
21129 | while (true) { | |||
21130 | E = E->IgnoreParenImpCasts(); | |||
21131 | if (CallExpr *call = dyn_cast<CallExpr>(E)) { | |||
21132 | E = call->getCallee(); | |||
21133 | diagID = diag::err_uncasted_call_of_unknown_any; | |||
21134 | } else { | |||
21135 | break; | |||
21136 | } | |||
21137 | } | |||
21138 | ||||
21139 | SourceLocation loc; | |||
21140 | NamedDecl *d; | |||
21141 | if (DeclRefExpr *ref = dyn_cast<DeclRefExpr>(E)) { | |||
21142 | loc = ref->getLocation(); | |||
21143 | d = ref->getDecl(); | |||
21144 | } else if (MemberExpr *mem = dyn_cast<MemberExpr>(E)) { | |||
21145 | loc = mem->getMemberLoc(); | |||
21146 | d = mem->getMemberDecl(); | |||
21147 | } else if (ObjCMessageExpr *msg = dyn_cast<ObjCMessageExpr>(E)) { | |||
21148 | diagID = diag::err_uncasted_call_of_unknown_any; | |||
21149 | loc = msg->getSelectorStartLoc(); | |||
21150 | d = msg->getMethodDecl(); | |||
21151 | if (!d) { | |||
21152 | S.Diag(loc, diag::err_uncasted_send_to_unknown_any_method) | |||
21153 | << static_cast<unsigned>(msg->isClassMessage()) << msg->getSelector() | |||
21154 | << orig->getSourceRange(); | |||
21155 | return ExprError(); | |||
21156 | } | |||
21157 | } else { | |||
21158 | S.Diag(E->getExprLoc(), diag::err_unsupported_unknown_any_expr) | |||
21159 | << E->getSourceRange(); | |||
21160 | return ExprError(); | |||
21161 | } | |||
21162 | ||||
21163 | S.Diag(loc, diagID) << d << orig->getSourceRange(); | |||
21164 | ||||
21165 | // Never recoverable. | |||
21166 | return ExprError(); | |||
21167 | } | |||
21168 | ||||
21169 | /// Check for operands with placeholder types and complain if found. | |||
21170 | /// Returns ExprError() if there was an error and no recovery was possible. | |||
21171 | ExprResult Sema::CheckPlaceholderExpr(Expr *E) { | |||
21172 | if (!Context.isDependenceAllowed()) { | |||
21173 | // C cannot handle TypoExpr nodes on either side of a binop because it | |||
21174 | // doesn't handle dependent types properly, so make sure any TypoExprs have | |||
21175 | // been dealt with before checking the operands. | |||
21176 | ExprResult Result = CorrectDelayedTyposInExpr(E); | |||
21177 | if (!Result.isUsable()) return ExprError(); | |||
21178 | E = Result.get(); | |||
21179 | } | |||
21180 | ||||
21181 | const BuiltinType *placeholderType = E->getType()->getAsPlaceholderType(); | |||
21182 | if (!placeholderType) return E; | |||
21183 | ||||
21184 | switch (placeholderType->getKind()) { | |||
21185 | ||||
21186 | // Overloaded expressions. | |||
21187 | case BuiltinType::Overload: { | |||
21188 | // Try to resolve a single function template specialization. | |||
21189 | // This is obligatory. | |||
21190 | ExprResult Result = E; | |||
21191 | if (ResolveAndFixSingleFunctionTemplateSpecialization(Result, false)) | |||
21192 | return Result; | |||
21193 | ||||
21194 | // No guarantees that ResolveAndFixSingleFunctionTemplateSpecialization | |||
21195 | // leaves Result unchanged on failure. | |||
21196 | Result = E; | |||
21197 | if (resolveAndFixAddressOfSingleOverloadCandidate(Result)) | |||
21198 | return Result; | |||
21199 | ||||
21200 | // If that failed, try to recover with a call. | |||
21201 | tryToRecoverWithCall(Result, PDiag(diag::err_ovl_unresolvable), | |||
21202 | /*complain*/ true); | |||
21203 | return Result; | |||
21204 | } | |||
21205 | ||||
21206 | // Bound member functions. | |||
21207 | case BuiltinType::BoundMember: { | |||
21208 | ExprResult result = E; | |||
21209 | const Expr *BME = E->IgnoreParens(); | |||
21210 | PartialDiagnostic PD = PDiag(diag::err_bound_member_function); | |||
21211 | // Try to give a nicer diagnostic if it is a bound member that we recognize. | |||
21212 | if (isa<CXXPseudoDestructorExpr>(BME)) { | |||
21213 | PD = PDiag(diag::err_dtor_expr_without_call) << /*pseudo-destructor*/ 1; | |||
21214 | } else if (const auto *ME = dyn_cast<MemberExpr>(BME)) { | |||
21215 | if (ME->getMemberNameInfo().getName().getNameKind() == | |||
21216 | DeclarationName::CXXDestructorName) | |||
21217 | PD = PDiag(diag::err_dtor_expr_without_call) << /*destructor*/ 0; | |||
21218 | } | |||
21219 | tryToRecoverWithCall(result, PD, | |||
21220 | /*complain*/ true); | |||
21221 | return result; | |||
21222 | } | |||
21223 | ||||
21224 | // ARC unbridged casts. | |||
21225 | case BuiltinType::ARCUnbridgedCast: { | |||
21226 | Expr *realCast = stripARCUnbridgedCast(E); | |||
21227 | diagnoseARCUnbridgedCast(realCast); | |||
21228 | return realCast; | |||
21229 | } | |||
21230 | ||||
21231 | // Expressions of unknown type. | |||
21232 | case BuiltinType::UnknownAny: | |||
21233 | return diagnoseUnknownAnyExpr(*this, E); | |||
21234 | ||||
21235 | // Pseudo-objects. | |||
21236 | case BuiltinType::PseudoObject: | |||
21237 | return checkPseudoObjectRValue(E); | |||
21238 | ||||
21239 | case BuiltinType::BuiltinFn: { | |||
21240 | // Accept __noop without parens by implicitly converting it to a call expr. | |||
21241 | auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts()); | |||
21242 | if (DRE) { | |||
21243 | auto *FD = cast<FunctionDecl>(DRE->getDecl()); | |||
21244 | unsigned BuiltinID = FD->getBuiltinID(); | |||
21245 | if (BuiltinID == Builtin::BI__noop) { | |||
21246 | E = ImpCastExprToType(E, Context.getPointerType(FD->getType()), | |||
21247 | CK_BuiltinFnToFnPtr) | |||
21248 | .get(); | |||
21249 | return CallExpr::Create(Context, E, /*Args=*/{}, Context.IntTy, | |||
21250 | VK_PRValue, SourceLocation(), | |||
21251 | FPOptionsOverride()); | |||
21252 | } | |||
21253 | ||||
21254 | if (Context.BuiltinInfo.isInStdNamespace(BuiltinID)) { | |||
21255 | // Any use of these other than a direct call is ill-formed as of C++20, | |||
21256 | // because they are not addressable functions. In earlier language | |||
21257 | // modes, warn and force an instantiation of the real body. | |||
21258 | Diag(E->getBeginLoc(), | |||
21259 | getLangOpts().CPlusPlus20 | |||
21260 | ? diag::err_use_of_unaddressable_function | |||
21261 | : diag::warn_cxx20_compat_use_of_unaddressable_function); | |||
21262 | if (FD->isImplicitlyInstantiable()) { | |||
21263 | // Require a definition here because a normal attempt at | |||
21264 | // instantiation for a builtin will be ignored, and we won't try | |||
21265 | // again later. We assume that the definition of the template | |||
21266 | // precedes this use. | |||
21267 | InstantiateFunctionDefinition(E->getBeginLoc(), FD, | |||
21268 | /*Recursive=*/false, | |||
21269 | /*DefinitionRequired=*/true, | |||
21270 | /*AtEndOfTU=*/false); | |||
21271 | } | |||
21272 | // Produce a properly-typed reference to the function. | |||
21273 | CXXScopeSpec SS; | |||
21274 | SS.Adopt(DRE->getQualifierLoc()); | |||
21275 | TemplateArgumentListInfo TemplateArgs; | |||
21276 | DRE->copyTemplateArgumentsInto(TemplateArgs); | |||
21277 | return BuildDeclRefExpr( | |||
21278 | FD, FD->getType(), VK_LValue, DRE->getNameInfo(), | |||
21279 | DRE->hasQualifier() ? &SS : nullptr, DRE->getFoundDecl(), | |||
21280 | DRE->getTemplateKeywordLoc(), | |||
21281 | DRE->hasExplicitTemplateArgs() ? &TemplateArgs : nullptr); | |||
21282 | } | |||
21283 | } | |||
21284 | ||||
21285 | Diag(E->getBeginLoc(), diag::err_builtin_fn_use); | |||
21286 | return ExprError(); | |||
21287 | } | |||
21288 | ||||
21289 | case BuiltinType::IncompleteMatrixIdx: | |||
21290 | Diag(cast<MatrixSubscriptExpr>(E->IgnoreParens()) | |||
21291 | ->getRowIdx() | |||
21292 | ->getBeginLoc(), | |||
21293 | diag::err_matrix_incomplete_index); | |||
21294 | return ExprError(); | |||
21295 | ||||
21296 | // Expressions of unknown type. | |||
21297 | case BuiltinType::OMPArraySection: | |||
21298 | Diag(E->getBeginLoc(), diag::err_omp_array_section_use); | |||
21299 | return ExprError(); | |||
21300 | ||||
21301 | // Expressions of unknown type. | |||
21302 | case BuiltinType::OMPArrayShaping: | |||
21303 | return ExprError(Diag(E->getBeginLoc(), diag::err_omp_array_shaping_use)); | |||
21304 | ||||
21305 | case BuiltinType::OMPIterator: | |||
21306 | return ExprError(Diag(E->getBeginLoc(), diag::err_omp_iterator_use)); | |||
21307 | ||||
21308 | // Everything else should be impossible. | |||
21309 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
21310 | case BuiltinType::Id: | |||
21311 | #include "clang/Basic/OpenCLImageTypes.def" | |||
21312 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
21313 | case BuiltinType::Id: | |||
21314 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
21315 | #define SVE_TYPE(Name, Id, SingletonId) \ | |||
21316 | case BuiltinType::Id: | |||
21317 | #include "clang/Basic/AArch64SVEACLETypes.def" | |||
21318 | #define PPC_VECTOR_TYPE(Name, Id, Size) \ | |||
21319 | case BuiltinType::Id: | |||
21320 | #include "clang/Basic/PPCTypes.def" | |||
21321 | #define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
21322 | #include "clang/Basic/RISCVVTypes.def" | |||
21323 | #define WASM_TYPE(Name, Id, SingletonId) case BuiltinType::Id: | |||
21324 | #include "clang/Basic/WebAssemblyReferenceTypes.def" | |||
21325 | #define BUILTIN_TYPE(Id, SingletonId) case BuiltinType::Id: | |||
21326 | #define PLACEHOLDER_TYPE(Id, SingletonId) | |||
21327 | #include "clang/AST/BuiltinTypes.def" | |||
21328 | break; | |||
21329 | } | |||
21330 | ||||
21331 | llvm_unreachable("invalid placeholder type!")::llvm::llvm_unreachable_internal("invalid placeholder type!" , "clang/lib/Sema/SemaExpr.cpp", 21331); | |||
21332 | } | |||
21333 | ||||
21334 | bool Sema::CheckCaseExpression(Expr *E) { | |||
21335 | if (E->isTypeDependent()) | |||
21336 | return true; | |||
21337 | if (E->isValueDependent() || E->isIntegerConstantExpr(Context)) | |||
21338 | return E->getType()->isIntegralOrEnumerationType(); | |||
21339 | return false; | |||
21340 | } | |||
21341 | ||||
21342 | /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. | |||
21343 | ExprResult | |||
21344 | Sema::ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) { | |||
21345 | 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!\"" , "clang/lib/Sema/SemaExpr.cpp", 21346, __extension__ __PRETTY_FUNCTION__ )) | |||
21346 | "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!\"" , "clang/lib/Sema/SemaExpr.cpp", 21346, __extension__ __PRETTY_FUNCTION__ )); | |||
21347 | QualType BoolT = Context.ObjCBuiltinBoolTy; | |||
21348 | if (!Context.getBOOLDecl()) { | |||
21349 | LookupResult Result(*this, &Context.Idents.get("BOOL"), OpLoc, | |||
21350 | Sema::LookupOrdinaryName); | |||
21351 | if (LookupName(Result, getCurScope()) && Result.isSingleResult()) { | |||
21352 | NamedDecl *ND = Result.getFoundDecl(); | |||
21353 | if (TypedefDecl *TD = dyn_cast<TypedefDecl>(ND)) | |||
21354 | Context.setBOOLDecl(TD); | |||
21355 | } | |||
21356 | } | |||
21357 | if (Context.getBOOLDecl()) | |||
21358 | BoolT = Context.getBOOLType(); | |||
21359 | return new (Context) | |||
21360 | ObjCBoolLiteralExpr(Kind == tok::kw___objc_yes, BoolT, OpLoc); | |||
21361 | } | |||
21362 | ||||
21363 | ExprResult Sema::ActOnObjCAvailabilityCheckExpr( | |||
21364 | llvm::ArrayRef<AvailabilitySpec> AvailSpecs, SourceLocation AtLoc, | |||
21365 | SourceLocation RParen) { | |||
21366 | auto FindSpecVersion = | |||
21367 | [&](StringRef Platform) -> std::optional<VersionTuple> { | |||
21368 | auto Spec = llvm::find_if(AvailSpecs, [&](const AvailabilitySpec &Spec) { | |||
21369 | return Spec.getPlatform() == Platform; | |||
21370 | }); | |||
21371 | // Transcribe the "ios" availability check to "maccatalyst" when compiling | |||
21372 | // for "maccatalyst" if "maccatalyst" is not specified. | |||
21373 | if (Spec == AvailSpecs.end() && Platform == "maccatalyst") { | |||
21374 | Spec = llvm::find_if(AvailSpecs, [&](const AvailabilitySpec &Spec) { | |||
21375 | return Spec.getPlatform() == "ios"; | |||
21376 | }); | |||
21377 | } | |||
21378 | if (Spec == AvailSpecs.end()) | |||
21379 | return std::nullopt; | |||
21380 | return Spec->getVersion(); | |||
21381 | }; | |||
21382 | ||||
21383 | VersionTuple Version; | |||
21384 | if (auto MaybeVersion = | |||
21385 | FindSpecVersion(Context.getTargetInfo().getPlatformName())) | |||
21386 | Version = *MaybeVersion; | |||
21387 | ||||
21388 | // The use of `@available` in the enclosing context should be analyzed to | |||
21389 | // warn when it's used inappropriately (i.e. not if(@available)). | |||
21390 | if (FunctionScopeInfo *Context = getCurFunctionAvailabilityContext()) | |||
21391 | Context->HasPotentialAvailabilityViolations = true; | |||
21392 | ||||
21393 | return new (Context) | |||
21394 | ObjCAvailabilityCheckExpr(Version, AtLoc, RParen, Context.BoolTy); | |||
21395 | } | |||
21396 | ||||
21397 | ExprResult Sema::CreateRecoveryExpr(SourceLocation Begin, SourceLocation End, | |||
21398 | ArrayRef<Expr *> SubExprs, QualType T) { | |||
21399 | if (!Context.getLangOpts().RecoveryAST) | |||
21400 | return ExprError(); | |||
21401 | ||||
21402 | if (isSFINAEContext()) | |||
21403 | return ExprError(); | |||
21404 | ||||
21405 | if (T.isNull() || T->isUndeducedType() || | |||
21406 | !Context.getLangOpts().RecoveryASTType) | |||
21407 | // We don't know the concrete type, fallback to dependent type. | |||
21408 | T = Context.DependentTy; | |||
21409 | ||||
21410 | return RecoveryExpr::Create(Context, T, Begin, End, SubExprs); | |||
21411 | } |