File: | tools/clang/lib/AST/Expr.cpp |
Warning: | line 4058, column 5 Called C++ object pointer is null |
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1 | //===--- Expr.cpp - Expression AST Node Implementation --------------------===// | |||
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 the Expr class and subclasses. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "clang/AST/Expr.h" | |||
14 | #include "clang/AST/APValue.h" | |||
15 | #include "clang/AST/ASTContext.h" | |||
16 | #include "clang/AST/Attr.h" | |||
17 | #include "clang/AST/DeclCXX.h" | |||
18 | #include "clang/AST/DeclObjC.h" | |||
19 | #include "clang/AST/DeclTemplate.h" | |||
20 | #include "clang/AST/EvaluatedExprVisitor.h" | |||
21 | #include "clang/AST/ExprCXX.h" | |||
22 | #include "clang/AST/Mangle.h" | |||
23 | #include "clang/AST/RecordLayout.h" | |||
24 | #include "clang/AST/StmtVisitor.h" | |||
25 | #include "clang/Basic/Builtins.h" | |||
26 | #include "clang/Basic/CharInfo.h" | |||
27 | #include "clang/Basic/SourceManager.h" | |||
28 | #include "clang/Basic/TargetInfo.h" | |||
29 | #include "clang/Lex/Lexer.h" | |||
30 | #include "clang/Lex/LiteralSupport.h" | |||
31 | #include "llvm/Support/ErrorHandling.h" | |||
32 | #include "llvm/Support/raw_ostream.h" | |||
33 | #include <algorithm> | |||
34 | #include <cstring> | |||
35 | using namespace clang; | |||
36 | ||||
37 | const Expr *Expr::getBestDynamicClassTypeExpr() const { | |||
38 | const Expr *E = this; | |||
39 | while (true) { | |||
40 | E = E->ignoreParenBaseCasts(); | |||
41 | ||||
42 | // Follow the RHS of a comma operator. | |||
43 | if (auto *BO = dyn_cast<BinaryOperator>(E)) { | |||
44 | if (BO->getOpcode() == BO_Comma) { | |||
45 | E = BO->getRHS(); | |||
46 | continue; | |||
47 | } | |||
48 | } | |||
49 | ||||
50 | // Step into initializer for materialized temporaries. | |||
51 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
52 | E = MTE->GetTemporaryExpr(); | |||
53 | continue; | |||
54 | } | |||
55 | ||||
56 | break; | |||
57 | } | |||
58 | ||||
59 | return E; | |||
60 | } | |||
61 | ||||
62 | const CXXRecordDecl *Expr::getBestDynamicClassType() const { | |||
63 | const Expr *E = getBestDynamicClassTypeExpr(); | |||
64 | QualType DerivedType = E->getType(); | |||
65 | if (const PointerType *PTy = DerivedType->getAs<PointerType>()) | |||
66 | DerivedType = PTy->getPointeeType(); | |||
67 | ||||
68 | if (DerivedType->isDependentType()) | |||
69 | return nullptr; | |||
70 | ||||
71 | const RecordType *Ty = DerivedType->castAs<RecordType>(); | |||
72 | Decl *D = Ty->getDecl(); | |||
73 | return cast<CXXRecordDecl>(D); | |||
74 | } | |||
75 | ||||
76 | const Expr *Expr::skipRValueSubobjectAdjustments( | |||
77 | SmallVectorImpl<const Expr *> &CommaLHSs, | |||
78 | SmallVectorImpl<SubobjectAdjustment> &Adjustments) const { | |||
79 | const Expr *E = this; | |||
80 | while (true) { | |||
81 | E = E->IgnoreParens(); | |||
82 | ||||
83 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { | |||
84 | if ((CE->getCastKind() == CK_DerivedToBase || | |||
85 | CE->getCastKind() == CK_UncheckedDerivedToBase) && | |||
86 | E->getType()->isRecordType()) { | |||
87 | E = CE->getSubExpr(); | |||
88 | CXXRecordDecl *Derived | |||
89 | = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl()); | |||
90 | Adjustments.push_back(SubobjectAdjustment(CE, Derived)); | |||
91 | continue; | |||
92 | } | |||
93 | ||||
94 | if (CE->getCastKind() == CK_NoOp) { | |||
95 | E = CE->getSubExpr(); | |||
96 | continue; | |||
97 | } | |||
98 | } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | |||
99 | if (!ME->isArrow()) { | |||
100 | assert(ME->getBase()->getType()->isRecordType())((ME->getBase()->getType()->isRecordType()) ? static_cast <void> (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 100, __PRETTY_FUNCTION__)); | |||
101 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) { | |||
102 | if (!Field->isBitField() && !Field->getType()->isReferenceType()) { | |||
103 | E = ME->getBase(); | |||
104 | Adjustments.push_back(SubobjectAdjustment(Field)); | |||
105 | continue; | |||
106 | } | |||
107 | } | |||
108 | } | |||
109 | } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
110 | if (BO->getOpcode() == BO_PtrMemD) { | |||
111 | assert(BO->getRHS()->isRValue())((BO->getRHS()->isRValue()) ? static_cast<void> ( 0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 111, __PRETTY_FUNCTION__)); | |||
112 | E = BO->getLHS(); | |||
113 | const MemberPointerType *MPT = | |||
114 | BO->getRHS()->getType()->getAs<MemberPointerType>(); | |||
115 | Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS())); | |||
116 | continue; | |||
117 | } else if (BO->getOpcode() == BO_Comma) { | |||
118 | CommaLHSs.push_back(BO->getLHS()); | |||
119 | E = BO->getRHS(); | |||
120 | continue; | |||
121 | } | |||
122 | } | |||
123 | ||||
124 | // Nothing changed. | |||
125 | break; | |||
126 | } | |||
127 | return E; | |||
128 | } | |||
129 | ||||
130 | /// isKnownToHaveBooleanValue - Return true if this is an integer expression | |||
131 | /// that is known to return 0 or 1. This happens for _Bool/bool expressions | |||
132 | /// but also int expressions which are produced by things like comparisons in | |||
133 | /// C. | |||
134 | bool Expr::isKnownToHaveBooleanValue() const { | |||
135 | const Expr *E = IgnoreParens(); | |||
136 | ||||
137 | // If this value has _Bool type, it is obvious 0/1. | |||
138 | if (E->getType()->isBooleanType()) return true; | |||
139 | // If this is a non-scalar-integer type, we don't care enough to try. | |||
140 | if (!E->getType()->isIntegralOrEnumerationType()) return false; | |||
141 | ||||
142 | if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | |||
143 | switch (UO->getOpcode()) { | |||
144 | case UO_Plus: | |||
145 | return UO->getSubExpr()->isKnownToHaveBooleanValue(); | |||
146 | case UO_LNot: | |||
147 | return true; | |||
148 | default: | |||
149 | return false; | |||
150 | } | |||
151 | } | |||
152 | ||||
153 | // Only look through implicit casts. If the user writes | |||
154 | // '(int) (a && b)' treat it as an arbitrary int. | |||
155 | if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E)) | |||
156 | return CE->getSubExpr()->isKnownToHaveBooleanValue(); | |||
157 | ||||
158 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
159 | switch (BO->getOpcode()) { | |||
160 | default: return false; | |||
161 | case BO_LT: // Relational operators. | |||
162 | case BO_GT: | |||
163 | case BO_LE: | |||
164 | case BO_GE: | |||
165 | case BO_EQ: // Equality operators. | |||
166 | case BO_NE: | |||
167 | case BO_LAnd: // AND operator. | |||
168 | case BO_LOr: // Logical OR operator. | |||
169 | return true; | |||
170 | ||||
171 | case BO_And: // Bitwise AND operator. | |||
172 | case BO_Xor: // Bitwise XOR operator. | |||
173 | case BO_Or: // Bitwise OR operator. | |||
174 | // Handle things like (x==2)|(y==12). | |||
175 | return BO->getLHS()->isKnownToHaveBooleanValue() && | |||
176 | BO->getRHS()->isKnownToHaveBooleanValue(); | |||
177 | ||||
178 | case BO_Comma: | |||
179 | case BO_Assign: | |||
180 | return BO->getRHS()->isKnownToHaveBooleanValue(); | |||
181 | } | |||
182 | } | |||
183 | ||||
184 | if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) | |||
185 | return CO->getTrueExpr()->isKnownToHaveBooleanValue() && | |||
186 | CO->getFalseExpr()->isKnownToHaveBooleanValue(); | |||
187 | ||||
188 | return false; | |||
189 | } | |||
190 | ||||
191 | // Amusing macro metaprogramming hack: check whether a class provides | |||
192 | // a more specific implementation of getExprLoc(). | |||
193 | // | |||
194 | // See also Stmt.cpp:{getBeginLoc(),getEndLoc()}. | |||
195 | namespace { | |||
196 | /// This implementation is used when a class provides a custom | |||
197 | /// implementation of getExprLoc. | |||
198 | template <class E, class T> | |||
199 | SourceLocation getExprLocImpl(const Expr *expr, | |||
200 | SourceLocation (T::*v)() const) { | |||
201 | return static_cast<const E*>(expr)->getExprLoc(); | |||
202 | } | |||
203 | ||||
204 | /// This implementation is used when a class doesn't provide | |||
205 | /// a custom implementation of getExprLoc. Overload resolution | |||
206 | /// should pick it over the implementation above because it's | |||
207 | /// more specialized according to function template partial ordering. | |||
208 | template <class E> | |||
209 | SourceLocation getExprLocImpl(const Expr *expr, | |||
210 | SourceLocation (Expr::*v)() const) { | |||
211 | return static_cast<const E *>(expr)->getBeginLoc(); | |||
212 | } | |||
213 | } | |||
214 | ||||
215 | SourceLocation Expr::getExprLoc() const { | |||
216 | switch (getStmtClass()) { | |||
217 | case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 217); | |||
218 | #define ABSTRACT_STMT(type) | |||
219 | #define STMT(type, base) \ | |||
220 | case Stmt::type##Class: break; | |||
221 | #define EXPR(type, base) \ | |||
222 | case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc); | |||
223 | #include "clang/AST/StmtNodes.inc" | |||
224 | } | |||
225 | llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 225); | |||
226 | } | |||
227 | ||||
228 | //===----------------------------------------------------------------------===// | |||
229 | // Primary Expressions. | |||
230 | //===----------------------------------------------------------------------===// | |||
231 | ||||
232 | /// Compute the type-, value-, and instantiation-dependence of a | |||
233 | /// declaration reference | |||
234 | /// based on the declaration being referenced. | |||
235 | static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D, | |||
236 | QualType T, bool &TypeDependent, | |||
237 | bool &ValueDependent, | |||
238 | bool &InstantiationDependent) { | |||
239 | TypeDependent = false; | |||
240 | ValueDependent = false; | |||
241 | InstantiationDependent = false; | |||
242 | ||||
243 | // (TD) C++ [temp.dep.expr]p3: | |||
244 | // An id-expression is type-dependent if it contains: | |||
245 | // | |||
246 | // and | |||
247 | // | |||
248 | // (VD) C++ [temp.dep.constexpr]p2: | |||
249 | // An identifier is value-dependent if it is: | |||
250 | ||||
251 | // (TD) - an identifier that was declared with dependent type | |||
252 | // (VD) - a name declared with a dependent type, | |||
253 | if (T->isDependentType()) { | |||
254 | TypeDependent = true; | |||
255 | ValueDependent = true; | |||
256 | InstantiationDependent = true; | |||
257 | return; | |||
258 | } else if (T->isInstantiationDependentType()) { | |||
259 | InstantiationDependent = true; | |||
260 | } | |||
261 | ||||
262 | // (TD) - a conversion-function-id that specifies a dependent type | |||
263 | if (D->getDeclName().getNameKind() | |||
264 | == DeclarationName::CXXConversionFunctionName) { | |||
265 | QualType T = D->getDeclName().getCXXNameType(); | |||
266 | if (T->isDependentType()) { | |||
267 | TypeDependent = true; | |||
268 | ValueDependent = true; | |||
269 | InstantiationDependent = true; | |||
270 | return; | |||
271 | } | |||
272 | ||||
273 | if (T->isInstantiationDependentType()) | |||
274 | InstantiationDependent = true; | |||
275 | } | |||
276 | ||||
277 | // (VD) - the name of a non-type template parameter, | |||
278 | if (isa<NonTypeTemplateParmDecl>(D)) { | |||
279 | ValueDependent = true; | |||
280 | InstantiationDependent = true; | |||
281 | return; | |||
282 | } | |||
283 | ||||
284 | // (VD) - a constant with integral or enumeration type and is | |||
285 | // initialized with an expression that is value-dependent. | |||
286 | // (VD) - a constant with literal type and is initialized with an | |||
287 | // expression that is value-dependent [C++11]. | |||
288 | // (VD) - FIXME: Missing from the standard: | |||
289 | // - an entity with reference type and is initialized with an | |||
290 | // expression that is value-dependent [C++11] | |||
291 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) { | |||
292 | if ((Ctx.getLangOpts().CPlusPlus11 ? | |||
293 | Var->getType()->isLiteralType(Ctx) : | |||
294 | Var->getType()->isIntegralOrEnumerationType()) && | |||
295 | (Var->getType().isConstQualified() || | |||
296 | Var->getType()->isReferenceType())) { | |||
297 | if (const Expr *Init = Var->getAnyInitializer()) | |||
298 | if (Init->isValueDependent()) { | |||
299 | ValueDependent = true; | |||
300 | InstantiationDependent = true; | |||
301 | } | |||
302 | } | |||
303 | ||||
304 | // (VD) - FIXME: Missing from the standard: | |||
305 | // - a member function or a static data member of the current | |||
306 | // instantiation | |||
307 | if (Var->isStaticDataMember() && | |||
308 | Var->getDeclContext()->isDependentContext()) { | |||
309 | ValueDependent = true; | |||
310 | InstantiationDependent = true; | |||
311 | TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo(); | |||
312 | if (TInfo->getType()->isIncompleteArrayType()) | |||
313 | TypeDependent = true; | |||
314 | } | |||
315 | ||||
316 | return; | |||
317 | } | |||
318 | ||||
319 | // (VD) - FIXME: Missing from the standard: | |||
320 | // - a member function or a static data member of the current | |||
321 | // instantiation | |||
322 | if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) { | |||
323 | ValueDependent = true; | |||
324 | InstantiationDependent = true; | |||
325 | } | |||
326 | } | |||
327 | ||||
328 | void DeclRefExpr::computeDependence(const ASTContext &Ctx) { | |||
329 | bool TypeDependent = false; | |||
330 | bool ValueDependent = false; | |||
331 | bool InstantiationDependent = false; | |||
332 | computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent, | |||
333 | ValueDependent, InstantiationDependent); | |||
334 | ||||
335 | ExprBits.TypeDependent |= TypeDependent; | |||
336 | ExprBits.ValueDependent |= ValueDependent; | |||
337 | ExprBits.InstantiationDependent |= InstantiationDependent; | |||
338 | ||||
339 | // Is the declaration a parameter pack? | |||
340 | if (getDecl()->isParameterPack()) | |||
341 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
342 | } | |||
343 | ||||
344 | DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D, | |||
345 | bool RefersToEnclosingVariableOrCapture, QualType T, | |||
346 | ExprValueKind VK, SourceLocation L, | |||
347 | const DeclarationNameLoc &LocInfo) | |||
348 | : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false), | |||
349 | D(D), DNLoc(LocInfo) { | |||
350 | DeclRefExprBits.HasQualifier = false; | |||
351 | DeclRefExprBits.HasTemplateKWAndArgsInfo = false; | |||
352 | DeclRefExprBits.HasFoundDecl = false; | |||
353 | DeclRefExprBits.HadMultipleCandidates = false; | |||
354 | DeclRefExprBits.RefersToEnclosingVariableOrCapture = | |||
355 | RefersToEnclosingVariableOrCapture; | |||
356 | DeclRefExprBits.Loc = L; | |||
357 | computeDependence(Ctx); | |||
358 | } | |||
359 | ||||
360 | DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, | |||
361 | NestedNameSpecifierLoc QualifierLoc, | |||
362 | SourceLocation TemplateKWLoc, ValueDecl *D, | |||
363 | bool RefersToEnclosingVariableOrCapture, | |||
364 | const DeclarationNameInfo &NameInfo, NamedDecl *FoundD, | |||
365 | const TemplateArgumentListInfo *TemplateArgs, | |||
366 | QualType T, ExprValueKind VK) | |||
367 | : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false), | |||
368 | D(D), DNLoc(NameInfo.getInfo()) { | |||
369 | DeclRefExprBits.Loc = NameInfo.getLoc(); | |||
370 | DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0; | |||
371 | if (QualifierLoc) { | |||
372 | new (getTrailingObjects<NestedNameSpecifierLoc>()) | |||
373 | NestedNameSpecifierLoc(QualifierLoc); | |||
374 | auto *NNS = QualifierLoc.getNestedNameSpecifier(); | |||
375 | if (NNS->isInstantiationDependent()) | |||
376 | ExprBits.InstantiationDependent = true; | |||
377 | if (NNS->containsUnexpandedParameterPack()) | |||
378 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
379 | } | |||
380 | DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0; | |||
381 | if (FoundD) | |||
382 | *getTrailingObjects<NamedDecl *>() = FoundD; | |||
383 | DeclRefExprBits.HasTemplateKWAndArgsInfo | |||
384 | = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0; | |||
385 | DeclRefExprBits.RefersToEnclosingVariableOrCapture = | |||
386 | RefersToEnclosingVariableOrCapture; | |||
387 | if (TemplateArgs) { | |||
388 | bool Dependent = false; | |||
389 | bool InstantiationDependent = false; | |||
390 | bool ContainsUnexpandedParameterPack = false; | |||
391 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
392 | TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(), | |||
393 | Dependent, InstantiationDependent, ContainsUnexpandedParameterPack); | |||
394 | assert(!Dependent && "built a DeclRefExpr with dependent template args")((!Dependent && "built a DeclRefExpr with dependent template args" ) ? static_cast<void> (0) : __assert_fail ("!Dependent && \"built a DeclRefExpr with dependent template args\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 394, __PRETTY_FUNCTION__)); | |||
395 | ExprBits.InstantiationDependent |= InstantiationDependent; | |||
396 | ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack; | |||
397 | } else if (TemplateKWLoc.isValid()) { | |||
398 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
399 | TemplateKWLoc); | |||
400 | } | |||
401 | DeclRefExprBits.HadMultipleCandidates = 0; | |||
402 | ||||
403 | computeDependence(Ctx); | |||
404 | } | |||
405 | ||||
406 | DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context, | |||
407 | NestedNameSpecifierLoc QualifierLoc, | |||
408 | SourceLocation TemplateKWLoc, | |||
409 | ValueDecl *D, | |||
410 | bool RefersToEnclosingVariableOrCapture, | |||
411 | SourceLocation NameLoc, | |||
412 | QualType T, | |||
413 | ExprValueKind VK, | |||
414 | NamedDecl *FoundD, | |||
415 | const TemplateArgumentListInfo *TemplateArgs) { | |||
416 | return Create(Context, QualifierLoc, TemplateKWLoc, D, | |||
417 | RefersToEnclosingVariableOrCapture, | |||
418 | DeclarationNameInfo(D->getDeclName(), NameLoc), | |||
419 | T, VK, FoundD, TemplateArgs); | |||
420 | } | |||
421 | ||||
422 | DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context, | |||
423 | NestedNameSpecifierLoc QualifierLoc, | |||
424 | SourceLocation TemplateKWLoc, | |||
425 | ValueDecl *D, | |||
426 | bool RefersToEnclosingVariableOrCapture, | |||
427 | const DeclarationNameInfo &NameInfo, | |||
428 | QualType T, | |||
429 | ExprValueKind VK, | |||
430 | NamedDecl *FoundD, | |||
431 | const TemplateArgumentListInfo *TemplateArgs) { | |||
432 | // Filter out cases where the found Decl is the same as the value refenenced. | |||
433 | if (D == FoundD) | |||
434 | FoundD = nullptr; | |||
435 | ||||
436 | bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid(); | |||
437 | std::size_t Size = | |||
438 | totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *, | |||
439 | ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>( | |||
440 | QualifierLoc ? 1 : 0, FoundD ? 1 : 0, | |||
441 | HasTemplateKWAndArgsInfo ? 1 : 0, | |||
442 | TemplateArgs ? TemplateArgs->size() : 0); | |||
443 | ||||
444 | void *Mem = Context.Allocate(Size, alignof(DeclRefExpr)); | |||
445 | return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D, | |||
446 | RefersToEnclosingVariableOrCapture, | |||
447 | NameInfo, FoundD, TemplateArgs, T, VK); | |||
448 | } | |||
449 | ||||
450 | DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context, | |||
451 | bool HasQualifier, | |||
452 | bool HasFoundDecl, | |||
453 | bool HasTemplateKWAndArgsInfo, | |||
454 | unsigned NumTemplateArgs) { | |||
455 | assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)((NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo) ? static_cast <void> (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 455, __PRETTY_FUNCTION__)); | |||
456 | std::size_t Size = | |||
457 | totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *, | |||
458 | ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>( | |||
459 | HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo, | |||
460 | NumTemplateArgs); | |||
461 | void *Mem = Context.Allocate(Size, alignof(DeclRefExpr)); | |||
462 | return new (Mem) DeclRefExpr(EmptyShell()); | |||
463 | } | |||
464 | ||||
465 | SourceLocation DeclRefExpr::getBeginLoc() const { | |||
466 | if (hasQualifier()) | |||
467 | return getQualifierLoc().getBeginLoc(); | |||
468 | return getNameInfo().getBeginLoc(); | |||
469 | } | |||
470 | SourceLocation DeclRefExpr::getEndLoc() const { | |||
471 | if (hasExplicitTemplateArgs()) | |||
472 | return getRAngleLoc(); | |||
473 | return getNameInfo().getEndLoc(); | |||
474 | } | |||
475 | ||||
476 | PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK, | |||
477 | StringLiteral *SL) | |||
478 | : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary, | |||
479 | FNTy->isDependentType(), FNTy->isDependentType(), | |||
480 | FNTy->isInstantiationDependentType(), | |||
481 | /*ContainsUnexpandedParameterPack=*/false) { | |||
482 | PredefinedExprBits.Kind = IK; | |||
483 | assert((getIdentKind() == IK) &&(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!" ) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 484, __PRETTY_FUNCTION__)) | |||
484 | "IdentKind do not fit in PredefinedExprBitfields!")(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!" ) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 484, __PRETTY_FUNCTION__)); | |||
485 | bool HasFunctionName = SL != nullptr; | |||
486 | PredefinedExprBits.HasFunctionName = HasFunctionName; | |||
487 | PredefinedExprBits.Loc = L; | |||
488 | if (HasFunctionName) | |||
489 | setFunctionName(SL); | |||
490 | } | |||
491 | ||||
492 | PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName) | |||
493 | : Expr(PredefinedExprClass, Empty) { | |||
494 | PredefinedExprBits.HasFunctionName = HasFunctionName; | |||
495 | } | |||
496 | ||||
497 | PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L, | |||
498 | QualType FNTy, IdentKind IK, | |||
499 | StringLiteral *SL) { | |||
500 | bool HasFunctionName = SL != nullptr; | |||
501 | void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName), | |||
502 | alignof(PredefinedExpr)); | |||
503 | return new (Mem) PredefinedExpr(L, FNTy, IK, SL); | |||
504 | } | |||
505 | ||||
506 | PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx, | |||
507 | bool HasFunctionName) { | |||
508 | void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName), | |||
509 | alignof(PredefinedExpr)); | |||
510 | return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName); | |||
511 | } | |||
512 | ||||
513 | StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) { | |||
514 | switch (IK) { | |||
515 | case Func: | |||
516 | return "__func__"; | |||
517 | case Function: | |||
518 | return "__FUNCTION__"; | |||
519 | case FuncDName: | |||
520 | return "__FUNCDNAME__"; | |||
521 | case LFunction: | |||
522 | return "L__FUNCTION__"; | |||
523 | case PrettyFunction: | |||
524 | return "__PRETTY_FUNCTION__"; | |||
525 | case FuncSig: | |||
526 | return "__FUNCSIG__"; | |||
527 | case LFuncSig: | |||
528 | return "L__FUNCSIG__"; | |||
529 | case PrettyFunctionNoVirtual: | |||
530 | break; | |||
531 | } | |||
532 | llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 532); | |||
533 | } | |||
534 | ||||
535 | // FIXME: Maybe this should use DeclPrinter with a special "print predefined | |||
536 | // expr" policy instead. | |||
537 | std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) { | |||
538 | ASTContext &Context = CurrentDecl->getASTContext(); | |||
539 | ||||
540 | if (IK == PredefinedExpr::FuncDName) { | |||
541 | if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) { | |||
542 | std::unique_ptr<MangleContext> MC; | |||
543 | MC.reset(Context.createMangleContext()); | |||
544 | ||||
545 | if (MC->shouldMangleDeclName(ND)) { | |||
546 | SmallString<256> Buffer; | |||
547 | llvm::raw_svector_ostream Out(Buffer); | |||
548 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND)) | |||
549 | MC->mangleCXXCtor(CD, Ctor_Base, Out); | |||
550 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND)) | |||
551 | MC->mangleCXXDtor(DD, Dtor_Base, Out); | |||
552 | else | |||
553 | MC->mangleName(ND, Out); | |||
554 | ||||
555 | if (!Buffer.empty() && Buffer.front() == '\01') | |||
556 | return Buffer.substr(1); | |||
557 | return Buffer.str(); | |||
558 | } else | |||
559 | return ND->getIdentifier()->getName(); | |||
560 | } | |||
561 | return ""; | |||
562 | } | |||
563 | if (isa<BlockDecl>(CurrentDecl)) { | |||
564 | // For blocks we only emit something if it is enclosed in a function | |||
565 | // For top-level block we'd like to include the name of variable, but we | |||
566 | // don't have it at this point. | |||
567 | auto DC = CurrentDecl->getDeclContext(); | |||
568 | if (DC->isFileContext()) | |||
569 | return ""; | |||
570 | ||||
571 | SmallString<256> Buffer; | |||
572 | llvm::raw_svector_ostream Out(Buffer); | |||
573 | if (auto *DCBlock = dyn_cast<BlockDecl>(DC)) | |||
574 | // For nested blocks, propagate up to the parent. | |||
575 | Out << ComputeName(IK, DCBlock); | |||
576 | else if (auto *DCDecl = dyn_cast<Decl>(DC)) | |||
577 | Out << ComputeName(IK, DCDecl) << "_block_invoke"; | |||
578 | return Out.str(); | |||
579 | } | |||
580 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) { | |||
581 | if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual && | |||
582 | IK != FuncSig && IK != LFuncSig) | |||
583 | return FD->getNameAsString(); | |||
584 | ||||
585 | SmallString<256> Name; | |||
586 | llvm::raw_svector_ostream Out(Name); | |||
587 | ||||
588 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | |||
589 | if (MD->isVirtual() && IK != PrettyFunctionNoVirtual) | |||
590 | Out << "virtual "; | |||
591 | if (MD->isStatic()) | |||
592 | Out << "static "; | |||
593 | } | |||
594 | ||||
595 | PrintingPolicy Policy(Context.getLangOpts()); | |||
596 | std::string Proto; | |||
597 | llvm::raw_string_ostream POut(Proto); | |||
598 | ||||
599 | const FunctionDecl *Decl = FD; | |||
600 | if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern()) | |||
601 | Decl = Pattern; | |||
602 | const FunctionType *AFT = Decl->getType()->getAs<FunctionType>(); | |||
603 | const FunctionProtoType *FT = nullptr; | |||
604 | if (FD->hasWrittenPrototype()) | |||
605 | FT = dyn_cast<FunctionProtoType>(AFT); | |||
606 | ||||
607 | if (IK == FuncSig || IK == LFuncSig) { | |||
608 | switch (AFT->getCallConv()) { | |||
609 | case CC_C: POut << "__cdecl "; break; | |||
610 | case CC_X86StdCall: POut << "__stdcall "; break; | |||
611 | case CC_X86FastCall: POut << "__fastcall "; break; | |||
612 | case CC_X86ThisCall: POut << "__thiscall "; break; | |||
613 | case CC_X86VectorCall: POut << "__vectorcall "; break; | |||
614 | case CC_X86RegCall: POut << "__regcall "; break; | |||
615 | // Only bother printing the conventions that MSVC knows about. | |||
616 | default: break; | |||
617 | } | |||
618 | } | |||
619 | ||||
620 | FD->printQualifiedName(POut, Policy); | |||
621 | ||||
622 | POut << "("; | |||
623 | if (FT) { | |||
624 | for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) { | |||
625 | if (i) POut << ", "; | |||
626 | POut << Decl->getParamDecl(i)->getType().stream(Policy); | |||
627 | } | |||
628 | ||||
629 | if (FT->isVariadic()) { | |||
630 | if (FD->getNumParams()) POut << ", "; | |||
631 | POut << "..."; | |||
632 | } else if ((IK == FuncSig || IK == LFuncSig || | |||
633 | !Context.getLangOpts().CPlusPlus) && | |||
634 | !Decl->getNumParams()) { | |||
635 | POut << "void"; | |||
636 | } | |||
637 | } | |||
638 | POut << ")"; | |||
639 | ||||
640 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | |||
641 | assert(FT && "We must have a written prototype in this case.")((FT && "We must have a written prototype in this case." ) ? static_cast<void> (0) : __assert_fail ("FT && \"We must have a written prototype in this case.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 641, __PRETTY_FUNCTION__)); | |||
642 | if (FT->isConst()) | |||
643 | POut << " const"; | |||
644 | if (FT->isVolatile()) | |||
645 | POut << " volatile"; | |||
646 | RefQualifierKind Ref = MD->getRefQualifier(); | |||
647 | if (Ref == RQ_LValue) | |||
648 | POut << " &"; | |||
649 | else if (Ref == RQ_RValue) | |||
650 | POut << " &&"; | |||
651 | } | |||
652 | ||||
653 | typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy; | |||
654 | SpecsTy Specs; | |||
655 | const DeclContext *Ctx = FD->getDeclContext(); | |||
656 | while (Ctx && isa<NamedDecl>(Ctx)) { | |||
657 | const ClassTemplateSpecializationDecl *Spec | |||
658 | = dyn_cast<ClassTemplateSpecializationDecl>(Ctx); | |||
659 | if (Spec && !Spec->isExplicitSpecialization()) | |||
660 | Specs.push_back(Spec); | |||
661 | Ctx = Ctx->getParent(); | |||
662 | } | |||
663 | ||||
664 | std::string TemplateParams; | |||
665 | llvm::raw_string_ostream TOut(TemplateParams); | |||
666 | for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend(); | |||
667 | I != E; ++I) { | |||
668 | const TemplateParameterList *Params | |||
669 | = (*I)->getSpecializedTemplate()->getTemplateParameters(); | |||
670 | const TemplateArgumentList &Args = (*I)->getTemplateArgs(); | |||
671 | assert(Params->size() == Args.size())((Params->size() == Args.size()) ? static_cast<void> (0) : __assert_fail ("Params->size() == Args.size()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 671, __PRETTY_FUNCTION__)); | |||
672 | for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) { | |||
673 | StringRef Param = Params->getParam(i)->getName(); | |||
674 | if (Param.empty()) continue; | |||
675 | TOut << Param << " = "; | |||
676 | Args.get(i).print(Policy, TOut); | |||
677 | TOut << ", "; | |||
678 | } | |||
679 | } | |||
680 | ||||
681 | FunctionTemplateSpecializationInfo *FSI | |||
682 | = FD->getTemplateSpecializationInfo(); | |||
683 | if (FSI && !FSI->isExplicitSpecialization()) { | |||
684 | const TemplateParameterList* Params | |||
685 | = FSI->getTemplate()->getTemplateParameters(); | |||
686 | const TemplateArgumentList* Args = FSI->TemplateArguments; | |||
687 | assert(Params->size() == Args->size())((Params->size() == Args->size()) ? static_cast<void > (0) : __assert_fail ("Params->size() == Args->size()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 687, __PRETTY_FUNCTION__)); | |||
688 | for (unsigned i = 0, e = Params->size(); i != e; ++i) { | |||
689 | StringRef Param = Params->getParam(i)->getName(); | |||
690 | if (Param.empty()) continue; | |||
691 | TOut << Param << " = "; | |||
692 | Args->get(i).print(Policy, TOut); | |||
693 | TOut << ", "; | |||
694 | } | |||
695 | } | |||
696 | ||||
697 | TOut.flush(); | |||
698 | if (!TemplateParams.empty()) { | |||
699 | // remove the trailing comma and space | |||
700 | TemplateParams.resize(TemplateParams.size() - 2); | |||
701 | POut << " [" << TemplateParams << "]"; | |||
702 | } | |||
703 | ||||
704 | POut.flush(); | |||
705 | ||||
706 | // Print "auto" for all deduced return types. This includes C++1y return | |||
707 | // type deduction and lambdas. For trailing return types resolve the | |||
708 | // decltype expression. Otherwise print the real type when this is | |||
709 | // not a constructor or destructor. | |||
710 | if (isa<CXXMethodDecl>(FD) && | |||
711 | cast<CXXMethodDecl>(FD)->getParent()->isLambda()) | |||
712 | Proto = "auto " + Proto; | |||
713 | else if (FT && FT->getReturnType()->getAs<DecltypeType>()) | |||
714 | FT->getReturnType() | |||
715 | ->getAs<DecltypeType>() | |||
716 | ->getUnderlyingType() | |||
717 | .getAsStringInternal(Proto, Policy); | |||
718 | else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD)) | |||
719 | AFT->getReturnType().getAsStringInternal(Proto, Policy); | |||
720 | ||||
721 | Out << Proto; | |||
722 | ||||
723 | return Name.str().str(); | |||
724 | } | |||
725 | if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) { | |||
726 | for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent()) | |||
727 | // Skip to its enclosing function or method, but not its enclosing | |||
728 | // CapturedDecl. | |||
729 | if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) { | |||
730 | const Decl *D = Decl::castFromDeclContext(DC); | |||
731 | return ComputeName(IK, D); | |||
732 | } | |||
733 | llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 733); | |||
734 | } | |||
735 | if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) { | |||
736 | SmallString<256> Name; | |||
737 | llvm::raw_svector_ostream Out(Name); | |||
738 | Out << (MD->isInstanceMethod() ? '-' : '+'); | |||
739 | Out << '['; | |||
740 | ||||
741 | // For incorrect code, there might not be an ObjCInterfaceDecl. Do | |||
742 | // a null check to avoid a crash. | |||
743 | if (const ObjCInterfaceDecl *ID = MD->getClassInterface()) | |||
744 | Out << *ID; | |||
745 | ||||
746 | if (const ObjCCategoryImplDecl *CID = | |||
747 | dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext())) | |||
748 | Out << '(' << *CID << ')'; | |||
749 | ||||
750 | Out << ' '; | |||
751 | MD->getSelector().print(Out); | |||
752 | Out << ']'; | |||
753 | ||||
754 | return Name.str().str(); | |||
755 | } | |||
756 | if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) { | |||
757 | // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string. | |||
758 | return "top level"; | |||
759 | } | |||
760 | return ""; | |||
761 | } | |||
762 | ||||
763 | void APNumericStorage::setIntValue(const ASTContext &C, | |||
764 | const llvm::APInt &Val) { | |||
765 | if (hasAllocation()) | |||
766 | C.Deallocate(pVal); | |||
767 | ||||
768 | BitWidth = Val.getBitWidth(); | |||
769 | unsigned NumWords = Val.getNumWords(); | |||
770 | const uint64_t* Words = Val.getRawData(); | |||
771 | if (NumWords > 1) { | |||
772 | pVal = new (C) uint64_t[NumWords]; | |||
773 | std::copy(Words, Words + NumWords, pVal); | |||
774 | } else if (NumWords == 1) | |||
775 | VAL = Words[0]; | |||
776 | else | |||
777 | VAL = 0; | |||
778 | } | |||
779 | ||||
780 | IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V, | |||
781 | QualType type, SourceLocation l) | |||
782 | : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false, | |||
783 | false, false), | |||
784 | Loc(l) { | |||
785 | assert(type->isIntegerType() && "Illegal type in IntegerLiteral")((type->isIntegerType() && "Illegal type in IntegerLiteral" ) ? static_cast<void> (0) : __assert_fail ("type->isIntegerType() && \"Illegal type in IntegerLiteral\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 785, __PRETTY_FUNCTION__)); | |||
786 | assert(V.getBitWidth() == C.getIntWidth(type) &&((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant." ) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 787, __PRETTY_FUNCTION__)) | |||
787 | "Integer type is not the correct size for constant.")((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant." ) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 787, __PRETTY_FUNCTION__)); | |||
788 | setValue(C, V); | |||
789 | } | |||
790 | ||||
791 | IntegerLiteral * | |||
792 | IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V, | |||
793 | QualType type, SourceLocation l) { | |||
794 | return new (C) IntegerLiteral(C, V, type, l); | |||
795 | } | |||
796 | ||||
797 | IntegerLiteral * | |||
798 | IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) { | |||
799 | return new (C) IntegerLiteral(Empty); | |||
800 | } | |||
801 | ||||
802 | FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V, | |||
803 | QualType type, SourceLocation l, | |||
804 | unsigned Scale) | |||
805 | : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false, | |||
806 | false, false), | |||
807 | Loc(l), Scale(Scale) { | |||
808 | assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral")((type->isFixedPointType() && "Illegal type in FixedPointLiteral" ) ? static_cast<void> (0) : __assert_fail ("type->isFixedPointType() && \"Illegal type in FixedPointLiteral\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 808, __PRETTY_FUNCTION__)); | |||
809 | assert(V.getBitWidth() == C.getTypeInfo(type).Width &&((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant." ) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 810, __PRETTY_FUNCTION__)) | |||
810 | "Fixed point type is not the correct size for constant.")((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant." ) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 810, __PRETTY_FUNCTION__)); | |||
811 | setValue(C, V); | |||
812 | } | |||
813 | ||||
814 | FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C, | |||
815 | const llvm::APInt &V, | |||
816 | QualType type, | |||
817 | SourceLocation l, | |||
818 | unsigned Scale) { | |||
819 | return new (C) FixedPointLiteral(C, V, type, l, Scale); | |||
820 | } | |||
821 | ||||
822 | std::string FixedPointLiteral::getValueAsString(unsigned Radix) const { | |||
823 | // Currently the longest decimal number that can be printed is the max for an | |||
824 | // unsigned long _Accum: 4294967295.99999999976716935634613037109375 | |||
825 | // which is 43 characters. | |||
826 | SmallString<64> S; | |||
827 | FixedPointValueToString( | |||
828 | S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale); | |||
829 | return S.str(); | |||
830 | } | |||
831 | ||||
832 | FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V, | |||
833 | bool isexact, QualType Type, SourceLocation L) | |||
834 | : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false, | |||
835 | false, false), Loc(L) { | |||
836 | setSemantics(V.getSemantics()); | |||
837 | FloatingLiteralBits.IsExact = isexact; | |||
838 | setValue(C, V); | |||
839 | } | |||
840 | ||||
841 | FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty) | |||
842 | : Expr(FloatingLiteralClass, Empty) { | |||
843 | setRawSemantics(IEEEhalf); | |||
844 | FloatingLiteralBits.IsExact = false; | |||
845 | } | |||
846 | ||||
847 | FloatingLiteral * | |||
848 | FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V, | |||
849 | bool isexact, QualType Type, SourceLocation L) { | |||
850 | return new (C) FloatingLiteral(C, V, isexact, Type, L); | |||
851 | } | |||
852 | ||||
853 | FloatingLiteral * | |||
854 | FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) { | |||
855 | return new (C) FloatingLiteral(C, Empty); | |||
856 | } | |||
857 | ||||
858 | const llvm::fltSemantics &FloatingLiteral::getSemantics() const { | |||
859 | switch(FloatingLiteralBits.Semantics) { | |||
860 | case IEEEhalf: | |||
861 | return llvm::APFloat::IEEEhalf(); | |||
862 | case IEEEsingle: | |||
863 | return llvm::APFloat::IEEEsingle(); | |||
864 | case IEEEdouble: | |||
865 | return llvm::APFloat::IEEEdouble(); | |||
866 | case x87DoubleExtended: | |||
867 | return llvm::APFloat::x87DoubleExtended(); | |||
868 | case IEEEquad: | |||
869 | return llvm::APFloat::IEEEquad(); | |||
870 | case PPCDoubleDouble: | |||
871 | return llvm::APFloat::PPCDoubleDouble(); | |||
872 | } | |||
873 | llvm_unreachable("Unrecognised floating semantics")::llvm::llvm_unreachable_internal("Unrecognised floating semantics" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 873); | |||
874 | } | |||
875 | ||||
876 | void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) { | |||
877 | if (&Sem == &llvm::APFloat::IEEEhalf()) | |||
878 | FloatingLiteralBits.Semantics = IEEEhalf; | |||
879 | else if (&Sem == &llvm::APFloat::IEEEsingle()) | |||
880 | FloatingLiteralBits.Semantics = IEEEsingle; | |||
881 | else if (&Sem == &llvm::APFloat::IEEEdouble()) | |||
882 | FloatingLiteralBits.Semantics = IEEEdouble; | |||
883 | else if (&Sem == &llvm::APFloat::x87DoubleExtended()) | |||
884 | FloatingLiteralBits.Semantics = x87DoubleExtended; | |||
885 | else if (&Sem == &llvm::APFloat::IEEEquad()) | |||
886 | FloatingLiteralBits.Semantics = IEEEquad; | |||
887 | else if (&Sem == &llvm::APFloat::PPCDoubleDouble()) | |||
888 | FloatingLiteralBits.Semantics = PPCDoubleDouble; | |||
889 | else | |||
890 | llvm_unreachable("Unknown floating semantics")::llvm::llvm_unreachable_internal("Unknown floating semantics" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 890); | |||
891 | } | |||
892 | ||||
893 | /// getValueAsApproximateDouble - This returns the value as an inaccurate | |||
894 | /// double. Note that this may cause loss of precision, but is useful for | |||
895 | /// debugging dumps, etc. | |||
896 | double FloatingLiteral::getValueAsApproximateDouble() const { | |||
897 | llvm::APFloat V = getValue(); | |||
898 | bool ignored; | |||
899 | V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven, | |||
900 | &ignored); | |||
901 | return V.convertToDouble(); | |||
902 | } | |||
903 | ||||
904 | unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target, | |||
905 | StringKind SK) { | |||
906 | unsigned CharByteWidth = 0; | |||
907 | switch (SK) { | |||
908 | case Ascii: | |||
909 | case UTF8: | |||
910 | CharByteWidth = Target.getCharWidth(); | |||
911 | break; | |||
912 | case Wide: | |||
913 | CharByteWidth = Target.getWCharWidth(); | |||
914 | break; | |||
915 | case UTF16: | |||
916 | CharByteWidth = Target.getChar16Width(); | |||
917 | break; | |||
918 | case UTF32: | |||
919 | CharByteWidth = Target.getChar32Width(); | |||
920 | break; | |||
921 | } | |||
922 | assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple")(((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple" ) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth & 7) == 0 && \"Assumes character size is byte multiple\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 922, __PRETTY_FUNCTION__)); | |||
923 | CharByteWidth /= 8; | |||
924 | assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) &&(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && "The only supported character byte widths are 1,2 and 4!" ) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 925, __PRETTY_FUNCTION__)) | |||
925 | "The only supported character byte widths are 1,2 and 4!")(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && "The only supported character byte widths are 1,2 and 4!" ) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 925, __PRETTY_FUNCTION__)); | |||
926 | return CharByteWidth; | |||
927 | } | |||
928 | ||||
929 | StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str, | |||
930 | StringKind Kind, bool Pascal, QualType Ty, | |||
931 | const SourceLocation *Loc, | |||
932 | unsigned NumConcatenated) | |||
933 | : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary, false, false, false, | |||
934 | false) { | |||
935 | assert(Ctx.getAsConstantArrayType(Ty) &&((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!" ) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 936, __PRETTY_FUNCTION__)) | |||
936 | "StringLiteral must be of constant array type!")((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!" ) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 936, __PRETTY_FUNCTION__)); | |||
937 | unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind); | |||
938 | unsigned ByteLength = Str.size(); | |||
939 | assert((ByteLength % CharByteWidth == 0) &&(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!" ) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 940, __PRETTY_FUNCTION__)) | |||
940 | "The size of the data must be a multiple of CharByteWidth!")(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!" ) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 940, __PRETTY_FUNCTION__)); | |||
941 | ||||
942 | // Avoid the expensive division. The compiler should be able to figure it | |||
943 | // out by itself. However as of clang 7, even with the appropriate | |||
944 | // llvm_unreachable added just here, it is not able to do so. | |||
945 | unsigned Length; | |||
946 | switch (CharByteWidth) { | |||
947 | case 1: | |||
948 | Length = ByteLength; | |||
949 | break; | |||
950 | case 2: | |||
951 | Length = ByteLength / 2; | |||
952 | break; | |||
953 | case 4: | |||
954 | Length = ByteLength / 4; | |||
955 | break; | |||
956 | default: | |||
957 | llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 957); | |||
958 | } | |||
959 | ||||
960 | StringLiteralBits.Kind = Kind; | |||
961 | StringLiteralBits.CharByteWidth = CharByteWidth; | |||
962 | StringLiteralBits.IsPascal = Pascal; | |||
963 | StringLiteralBits.NumConcatenated = NumConcatenated; | |||
964 | *getTrailingObjects<unsigned>() = Length; | |||
965 | ||||
966 | // Initialize the trailing array of SourceLocation. | |||
967 | // This is safe since SourceLocation is POD-like. | |||
968 | std::memcpy(getTrailingObjects<SourceLocation>(), Loc, | |||
969 | NumConcatenated * sizeof(SourceLocation)); | |||
970 | ||||
971 | // Initialize the trailing array of char holding the string data. | |||
972 | std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength); | |||
973 | } | |||
974 | ||||
975 | StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated, | |||
976 | unsigned Length, unsigned CharByteWidth) | |||
977 | : Expr(StringLiteralClass, Empty) { | |||
978 | StringLiteralBits.CharByteWidth = CharByteWidth; | |||
979 | StringLiteralBits.NumConcatenated = NumConcatenated; | |||
980 | *getTrailingObjects<unsigned>() = Length; | |||
981 | } | |||
982 | ||||
983 | StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str, | |||
984 | StringKind Kind, bool Pascal, QualType Ty, | |||
985 | const SourceLocation *Loc, | |||
986 | unsigned NumConcatenated) { | |||
987 | void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>( | |||
988 | 1, NumConcatenated, Str.size()), | |||
989 | alignof(StringLiteral)); | |||
990 | return new (Mem) | |||
991 | StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated); | |||
992 | } | |||
993 | ||||
994 | StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx, | |||
995 | unsigned NumConcatenated, | |||
996 | unsigned Length, | |||
997 | unsigned CharByteWidth) { | |||
998 | void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>( | |||
999 | 1, NumConcatenated, Length * CharByteWidth), | |||
1000 | alignof(StringLiteral)); | |||
1001 | return new (Mem) | |||
1002 | StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth); | |||
1003 | } | |||
1004 | ||||
1005 | void StringLiteral::outputString(raw_ostream &OS) const { | |||
1006 | switch (getKind()) { | |||
1007 | case Ascii: break; // no prefix. | |||
1008 | case Wide: OS << 'L'; break; | |||
1009 | case UTF8: OS << "u8"; break; | |||
1010 | case UTF16: OS << 'u'; break; | |||
1011 | case UTF32: OS << 'U'; break; | |||
1012 | } | |||
1013 | OS << '"'; | |||
1014 | static const char Hex[] = "0123456789ABCDEF"; | |||
1015 | ||||
1016 | unsigned LastSlashX = getLength(); | |||
1017 | for (unsigned I = 0, N = getLength(); I != N; ++I) { | |||
1018 | switch (uint32_t Char = getCodeUnit(I)) { | |||
1019 | default: | |||
1020 | // FIXME: Convert UTF-8 back to codepoints before rendering. | |||
1021 | ||||
1022 | // Convert UTF-16 surrogate pairs back to codepoints before rendering. | |||
1023 | // Leave invalid surrogates alone; we'll use \x for those. | |||
1024 | if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 && | |||
1025 | Char <= 0xdbff) { | |||
1026 | uint32_t Trail = getCodeUnit(I + 1); | |||
1027 | if (Trail >= 0xdc00 && Trail <= 0xdfff) { | |||
1028 | Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00); | |||
1029 | ++I; | |||
1030 | } | |||
1031 | } | |||
1032 | ||||
1033 | if (Char > 0xff) { | |||
1034 | // If this is a wide string, output characters over 0xff using \x | |||
1035 | // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a | |||
1036 | // codepoint: use \x escapes for invalid codepoints. | |||
1037 | if (getKind() == Wide || | |||
1038 | (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) { | |||
1039 | // FIXME: Is this the best way to print wchar_t? | |||
1040 | OS << "\\x"; | |||
1041 | int Shift = 28; | |||
1042 | while ((Char >> Shift) == 0) | |||
1043 | Shift -= 4; | |||
1044 | for (/**/; Shift >= 0; Shift -= 4) | |||
1045 | OS << Hex[(Char >> Shift) & 15]; | |||
1046 | LastSlashX = I; | |||
1047 | break; | |||
1048 | } | |||
1049 | ||||
1050 | if (Char > 0xffff) | |||
1051 | OS << "\\U00" | |||
1052 | << Hex[(Char >> 20) & 15] | |||
1053 | << Hex[(Char >> 16) & 15]; | |||
1054 | else | |||
1055 | OS << "\\u"; | |||
1056 | OS << Hex[(Char >> 12) & 15] | |||
1057 | << Hex[(Char >> 8) & 15] | |||
1058 | << Hex[(Char >> 4) & 15] | |||
1059 | << Hex[(Char >> 0) & 15]; | |||
1060 | break; | |||
1061 | } | |||
1062 | ||||
1063 | // If we used \x... for the previous character, and this character is a | |||
1064 | // hexadecimal digit, prevent it being slurped as part of the \x. | |||
1065 | if (LastSlashX + 1 == I) { | |||
1066 | switch (Char) { | |||
1067 | case '0': case '1': case '2': case '3': case '4': | |||
1068 | case '5': case '6': case '7': case '8': case '9': | |||
1069 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |||
1070 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |||
1071 | OS << "\"\""; | |||
1072 | } | |||
1073 | } | |||
1074 | ||||
1075 | assert(Char <= 0xff &&((Char <= 0xff && "Characters above 0xff should already have been handled." ) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1076, __PRETTY_FUNCTION__)) | |||
1076 | "Characters above 0xff should already have been handled.")((Char <= 0xff && "Characters above 0xff should already have been handled." ) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1076, __PRETTY_FUNCTION__)); | |||
1077 | ||||
1078 | if (isPrintable(Char)) | |||
1079 | OS << (char)Char; | |||
1080 | else // Output anything hard as an octal escape. | |||
1081 | OS << '\\' | |||
1082 | << (char)('0' + ((Char >> 6) & 7)) | |||
1083 | << (char)('0' + ((Char >> 3) & 7)) | |||
1084 | << (char)('0' + ((Char >> 0) & 7)); | |||
1085 | break; | |||
1086 | // Handle some common non-printable cases to make dumps prettier. | |||
1087 | case '\\': OS << "\\\\"; break; | |||
1088 | case '"': OS << "\\\""; break; | |||
1089 | case '\a': OS << "\\a"; break; | |||
1090 | case '\b': OS << "\\b"; break; | |||
1091 | case '\f': OS << "\\f"; break; | |||
1092 | case '\n': OS << "\\n"; break; | |||
1093 | case '\r': OS << "\\r"; break; | |||
1094 | case '\t': OS << "\\t"; break; | |||
1095 | case '\v': OS << "\\v"; break; | |||
1096 | } | |||
1097 | } | |||
1098 | OS << '"'; | |||
1099 | } | |||
1100 | ||||
1101 | /// getLocationOfByte - Return a source location that points to the specified | |||
1102 | /// byte of this string literal. | |||
1103 | /// | |||
1104 | /// Strings are amazingly complex. They can be formed from multiple tokens and | |||
1105 | /// can have escape sequences in them in addition to the usual trigraph and | |||
1106 | /// escaped newline business. This routine handles this complexity. | |||
1107 | /// | |||
1108 | /// The *StartToken sets the first token to be searched in this function and | |||
1109 | /// the *StartTokenByteOffset is the byte offset of the first token. Before | |||
1110 | /// returning, it updates the *StartToken to the TokNo of the token being found | |||
1111 | /// and sets *StartTokenByteOffset to the byte offset of the token in the | |||
1112 | /// string. | |||
1113 | /// Using these two parameters can reduce the time complexity from O(n^2) to | |||
1114 | /// O(n) if one wants to get the location of byte for all the tokens in a | |||
1115 | /// string. | |||
1116 | /// | |||
1117 | SourceLocation | |||
1118 | StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM, | |||
1119 | const LangOptions &Features, | |||
1120 | const TargetInfo &Target, unsigned *StartToken, | |||
1121 | unsigned *StartTokenByteOffset) const { | |||
1122 | assert((getKind() == StringLiteral::Ascii ||(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral ::UTF8) && "Only narrow string literals are currently supported" ) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1124, __PRETTY_FUNCTION__)) | |||
1123 | getKind() == StringLiteral::UTF8) &&(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral ::UTF8) && "Only narrow string literals are currently supported" ) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1124, __PRETTY_FUNCTION__)) | |||
1124 | "Only narrow string literals are currently supported")(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral ::UTF8) && "Only narrow string literals are currently supported" ) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1124, __PRETTY_FUNCTION__)); | |||
1125 | ||||
1126 | // Loop over all of the tokens in this string until we find the one that | |||
1127 | // contains the byte we're looking for. | |||
1128 | unsigned TokNo = 0; | |||
1129 | unsigned StringOffset = 0; | |||
1130 | if (StartToken) | |||
1131 | TokNo = *StartToken; | |||
1132 | if (StartTokenByteOffset) { | |||
1133 | StringOffset = *StartTokenByteOffset; | |||
1134 | ByteNo -= StringOffset; | |||
1135 | } | |||
1136 | while (1) { | |||
1137 | assert(TokNo < getNumConcatenated() && "Invalid byte number!")((TokNo < getNumConcatenated() && "Invalid byte number!" ) ? static_cast<void> (0) : __assert_fail ("TokNo < getNumConcatenated() && \"Invalid byte number!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1137, __PRETTY_FUNCTION__)); | |||
1138 | SourceLocation StrTokLoc = getStrTokenLoc(TokNo); | |||
1139 | ||||
1140 | // Get the spelling of the string so that we can get the data that makes up | |||
1141 | // the string literal, not the identifier for the macro it is potentially | |||
1142 | // expanded through. | |||
1143 | SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc); | |||
1144 | ||||
1145 | // Re-lex the token to get its length and original spelling. | |||
1146 | std::pair<FileID, unsigned> LocInfo = | |||
1147 | SM.getDecomposedLoc(StrTokSpellingLoc); | |||
1148 | bool Invalid = false; | |||
1149 | StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid); | |||
1150 | if (Invalid) { | |||
1151 | if (StartTokenByteOffset != nullptr) | |||
1152 | *StartTokenByteOffset = StringOffset; | |||
1153 | if (StartToken != nullptr) | |||
1154 | *StartToken = TokNo; | |||
1155 | return StrTokSpellingLoc; | |||
1156 | } | |||
1157 | ||||
1158 | const char *StrData = Buffer.data()+LocInfo.second; | |||
1159 | ||||
1160 | // Create a lexer starting at the beginning of this token. | |||
1161 | Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features, | |||
1162 | Buffer.begin(), StrData, Buffer.end()); | |||
1163 | Token TheTok; | |||
1164 | TheLexer.LexFromRawLexer(TheTok); | |||
1165 | ||||
1166 | // Use the StringLiteralParser to compute the length of the string in bytes. | |||
1167 | StringLiteralParser SLP(TheTok, SM, Features, Target); | |||
1168 | unsigned TokNumBytes = SLP.GetStringLength(); | |||
1169 | ||||
1170 | // If the byte is in this token, return the location of the byte. | |||
1171 | if (ByteNo < TokNumBytes || | |||
1172 | (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) { | |||
1173 | unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo); | |||
1174 | ||||
1175 | // Now that we know the offset of the token in the spelling, use the | |||
1176 | // preprocessor to get the offset in the original source. | |||
1177 | if (StartTokenByteOffset != nullptr) | |||
1178 | *StartTokenByteOffset = StringOffset; | |||
1179 | if (StartToken != nullptr) | |||
1180 | *StartToken = TokNo; | |||
1181 | return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features); | |||
1182 | } | |||
1183 | ||||
1184 | // Move to the next string token. | |||
1185 | StringOffset += TokNumBytes; | |||
1186 | ++TokNo; | |||
1187 | ByteNo -= TokNumBytes; | |||
1188 | } | |||
1189 | } | |||
1190 | ||||
1191 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it | |||
1192 | /// corresponds to, e.g. "sizeof" or "[pre]++". | |||
1193 | StringRef UnaryOperator::getOpcodeStr(Opcode Op) { | |||
1194 | switch (Op) { | |||
1195 | #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling; | |||
1196 | #include "clang/AST/OperationKinds.def" | |||
1197 | } | |||
1198 | llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1198); | |||
1199 | } | |||
1200 | ||||
1201 | UnaryOperatorKind | |||
1202 | UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) { | |||
1203 | switch (OO) { | |||
1204 | default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1204); | |||
1205 | case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc; | |||
1206 | case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec; | |||
1207 | case OO_Amp: return UO_AddrOf; | |||
1208 | case OO_Star: return UO_Deref; | |||
1209 | case OO_Plus: return UO_Plus; | |||
1210 | case OO_Minus: return UO_Minus; | |||
1211 | case OO_Tilde: return UO_Not; | |||
1212 | case OO_Exclaim: return UO_LNot; | |||
1213 | case OO_Coawait: return UO_Coawait; | |||
1214 | } | |||
1215 | } | |||
1216 | ||||
1217 | OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) { | |||
1218 | switch (Opc) { | |||
1219 | case UO_PostInc: case UO_PreInc: return OO_PlusPlus; | |||
1220 | case UO_PostDec: case UO_PreDec: return OO_MinusMinus; | |||
1221 | case UO_AddrOf: return OO_Amp; | |||
1222 | case UO_Deref: return OO_Star; | |||
1223 | case UO_Plus: return OO_Plus; | |||
1224 | case UO_Minus: return OO_Minus; | |||
1225 | case UO_Not: return OO_Tilde; | |||
1226 | case UO_LNot: return OO_Exclaim; | |||
1227 | case UO_Coawait: return OO_Coawait; | |||
1228 | default: return OO_None; | |||
1229 | } | |||
1230 | } | |||
1231 | ||||
1232 | ||||
1233 | //===----------------------------------------------------------------------===// | |||
1234 | // Postfix Operators. | |||
1235 | //===----------------------------------------------------------------------===// | |||
1236 | ||||
1237 | CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs, | |||
1238 | ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK, | |||
1239 | SourceLocation RParenLoc, unsigned MinNumArgs, | |||
1240 | ADLCallKind UsesADL) | |||
1241 | : Expr(SC, Ty, VK, OK_Ordinary, Fn->isTypeDependent(), | |||
1242 | Fn->isValueDependent(), Fn->isInstantiationDependent(), | |||
1243 | Fn->containsUnexpandedParameterPack()), | |||
1244 | RParenLoc(RParenLoc) { | |||
1245 | NumArgs = std::max<unsigned>(Args.size(), MinNumArgs); | |||
1246 | unsigned NumPreArgs = PreArgs.size(); | |||
1247 | CallExprBits.NumPreArgs = NumPreArgs; | |||
1248 | assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!" ) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1248, __PRETTY_FUNCTION__)); | |||
1249 | ||||
1250 | unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC); | |||
1251 | CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects; | |||
1252 | assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects ) && "OffsetToTrailingObjects overflow!") ? static_cast <void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1253, __PRETTY_FUNCTION__)) | |||
1253 | "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects ) && "OffsetToTrailingObjects overflow!") ? static_cast <void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1253, __PRETTY_FUNCTION__)); | |||
1254 | ||||
1255 | CallExprBits.UsesADL = static_cast<bool>(UsesADL); | |||
1256 | ||||
1257 | setCallee(Fn); | |||
1258 | for (unsigned I = 0; I != NumPreArgs; ++I) { | |||
1259 | updateDependenciesFromArg(PreArgs[I]); | |||
1260 | setPreArg(I, PreArgs[I]); | |||
1261 | } | |||
1262 | for (unsigned I = 0; I != Args.size(); ++I) { | |||
1263 | updateDependenciesFromArg(Args[I]); | |||
1264 | setArg(I, Args[I]); | |||
1265 | } | |||
1266 | for (unsigned I = Args.size(); I != NumArgs; ++I) { | |||
1267 | setArg(I, nullptr); | |||
1268 | } | |||
1269 | } | |||
1270 | ||||
1271 | CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs, | |||
1272 | EmptyShell Empty) | |||
1273 | : Expr(SC, Empty), NumArgs(NumArgs) { | |||
1274 | CallExprBits.NumPreArgs = NumPreArgs; | |||
1275 | assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!" ) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1275, __PRETTY_FUNCTION__)); | |||
1276 | ||||
1277 | unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC); | |||
1278 | CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects; | |||
1279 | assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects ) && "OffsetToTrailingObjects overflow!") ? static_cast <void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1280, __PRETTY_FUNCTION__)) | |||
1280 | "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects ) && "OffsetToTrailingObjects overflow!") ? static_cast <void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1280, __PRETTY_FUNCTION__)); | |||
1281 | } | |||
1282 | ||||
1283 | CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn, | |||
1284 | ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK, | |||
1285 | SourceLocation RParenLoc, unsigned MinNumArgs, | |||
1286 | ADLCallKind UsesADL) { | |||
1287 | unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs); | |||
1288 | unsigned SizeOfTrailingObjects = | |||
1289 | CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs); | |||
1290 | void *Mem = | |||
1291 | Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr)); | |||
1292 | return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK, | |||
1293 | RParenLoc, MinNumArgs, UsesADL); | |||
1294 | } | |||
1295 | ||||
1296 | CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty, | |||
1297 | ExprValueKind VK, SourceLocation RParenLoc, | |||
1298 | ADLCallKind UsesADL) { | |||
1299 | assert(!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) &&((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr )) && "Misaligned memory in CallExpr::CreateTemporary!" ) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1300, __PRETTY_FUNCTION__)) | |||
1300 | "Misaligned memory in CallExpr::CreateTemporary!")((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr )) && "Misaligned memory in CallExpr::CreateTemporary!" ) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1300, __PRETTY_FUNCTION__)); | |||
1301 | return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty, | |||
1302 | VK, RParenLoc, /*MinNumArgs=*/0, UsesADL); | |||
1303 | } | |||
1304 | ||||
1305 | CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs, | |||
1306 | EmptyShell Empty) { | |||
1307 | unsigned SizeOfTrailingObjects = | |||
1308 | CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs); | |||
1309 | void *Mem = | |||
1310 | Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr)); | |||
1311 | return new (Mem) CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, Empty); | |||
1312 | } | |||
1313 | ||||
1314 | unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) { | |||
1315 | switch (SC) { | |||
1316 | case CallExprClass: | |||
1317 | return sizeof(CallExpr); | |||
1318 | case CXXOperatorCallExprClass: | |||
1319 | return sizeof(CXXOperatorCallExpr); | |||
1320 | case CXXMemberCallExprClass: | |||
1321 | return sizeof(CXXMemberCallExpr); | |||
1322 | case UserDefinedLiteralClass: | |||
1323 | return sizeof(UserDefinedLiteral); | |||
1324 | case CUDAKernelCallExprClass: | |||
1325 | return sizeof(CUDAKernelCallExpr); | |||
1326 | default: | |||
1327 | llvm_unreachable("unexpected class deriving from CallExpr!")::llvm::llvm_unreachable_internal("unexpected class deriving from CallExpr!" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1327); | |||
1328 | } | |||
1329 | } | |||
1330 | ||||
1331 | void CallExpr::updateDependenciesFromArg(Expr *Arg) { | |||
1332 | if (Arg->isTypeDependent()) | |||
1333 | ExprBits.TypeDependent = true; | |||
1334 | if (Arg->isValueDependent()) | |||
1335 | ExprBits.ValueDependent = true; | |||
1336 | if (Arg->isInstantiationDependent()) | |||
1337 | ExprBits.InstantiationDependent = true; | |||
1338 | if (Arg->containsUnexpandedParameterPack()) | |||
1339 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
1340 | } | |||
1341 | ||||
1342 | Decl *Expr::getReferencedDeclOfCallee() { | |||
1343 | Expr *CEE = IgnoreParenImpCasts(); | |||
1344 | ||||
1345 | while (SubstNonTypeTemplateParmExpr *NTTP | |||
1346 | = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) { | |||
1347 | CEE = NTTP->getReplacement()->IgnoreParenCasts(); | |||
1348 | } | |||
1349 | ||||
1350 | // If we're calling a dereference, look at the pointer instead. | |||
1351 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) { | |||
1352 | if (BO->isPtrMemOp()) | |||
1353 | CEE = BO->getRHS()->IgnoreParenCasts(); | |||
1354 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) { | |||
1355 | if (UO->getOpcode() == UO_Deref) | |||
1356 | CEE = UO->getSubExpr()->IgnoreParenCasts(); | |||
1357 | } | |||
1358 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) | |||
1359 | return DRE->getDecl(); | |||
1360 | if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE)) | |||
1361 | return ME->getMemberDecl(); | |||
1362 | if (auto *BE = dyn_cast<BlockExpr>(CEE)) | |||
1363 | return BE->getBlockDecl(); | |||
1364 | ||||
1365 | return nullptr; | |||
1366 | } | |||
1367 | ||||
1368 | /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If | |||
1369 | /// not, return 0. | |||
1370 | unsigned CallExpr::getBuiltinCallee() const { | |||
1371 | // All simple function calls (e.g. func()) are implicitly cast to pointer to | |||
1372 | // function. As a result, we try and obtain the DeclRefExpr from the | |||
1373 | // ImplicitCastExpr. | |||
1374 | const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); | |||
1375 | if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). | |||
1376 | return 0; | |||
1377 | ||||
1378 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); | |||
1379 | if (!DRE) | |||
1380 | return 0; | |||
1381 | ||||
1382 | const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); | |||
1383 | if (!FDecl) | |||
1384 | return 0; | |||
1385 | ||||
1386 | if (!FDecl->getIdentifier()) | |||
1387 | return 0; | |||
1388 | ||||
1389 | return FDecl->getBuiltinID(); | |||
1390 | } | |||
1391 | ||||
1392 | bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const { | |||
1393 | if (unsigned BI = getBuiltinCallee()) | |||
1394 | return Ctx.BuiltinInfo.isUnevaluated(BI); | |||
1395 | return false; | |||
1396 | } | |||
1397 | ||||
1398 | QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const { | |||
1399 | const Expr *Callee = getCallee(); | |||
1400 | QualType CalleeType = Callee->getType(); | |||
1401 | if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) { | |||
1402 | CalleeType = FnTypePtr->getPointeeType(); | |||
1403 | } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) { | |||
1404 | CalleeType = BPT->getPointeeType(); | |||
1405 | } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) { | |||
1406 | if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens())) | |||
1407 | return Ctx.VoidTy; | |||
1408 | ||||
1409 | // This should never be overloaded and so should never return null. | |||
1410 | CalleeType = Expr::findBoundMemberType(Callee); | |||
1411 | } | |||
1412 | ||||
1413 | const FunctionType *FnType = CalleeType->castAs<FunctionType>(); | |||
1414 | return FnType->getReturnType(); | |||
1415 | } | |||
1416 | ||||
1417 | const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const { | |||
1418 | // If the return type is a struct, union, or enum that is marked nodiscard, | |||
1419 | // then return the return type attribute. | |||
1420 | if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl()) | |||
1421 | if (const auto *A = TD->getAttr<WarnUnusedResultAttr>()) | |||
1422 | return A; | |||
1423 | ||||
1424 | // Otherwise, see if the callee is marked nodiscard and return that attribute | |||
1425 | // instead. | |||
1426 | const Decl *D = getCalleeDecl(); | |||
1427 | return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr; | |||
1428 | } | |||
1429 | ||||
1430 | SourceLocation CallExpr::getBeginLoc() const { | |||
1431 | if (isa<CXXOperatorCallExpr>(this)) | |||
1432 | return cast<CXXOperatorCallExpr>(this)->getBeginLoc(); | |||
1433 | ||||
1434 | SourceLocation begin = getCallee()->getBeginLoc(); | |||
1435 | if (begin.isInvalid() && getNumArgs() > 0 && getArg(0)) | |||
1436 | begin = getArg(0)->getBeginLoc(); | |||
1437 | return begin; | |||
1438 | } | |||
1439 | SourceLocation CallExpr::getEndLoc() const { | |||
1440 | if (isa<CXXOperatorCallExpr>(this)) | |||
1441 | return cast<CXXOperatorCallExpr>(this)->getEndLoc(); | |||
1442 | ||||
1443 | SourceLocation end = getRParenLoc(); | |||
1444 | if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1)) | |||
1445 | end = getArg(getNumArgs() - 1)->getEndLoc(); | |||
1446 | return end; | |||
1447 | } | |||
1448 | ||||
1449 | OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type, | |||
1450 | SourceLocation OperatorLoc, | |||
1451 | TypeSourceInfo *tsi, | |||
1452 | ArrayRef<OffsetOfNode> comps, | |||
1453 | ArrayRef<Expr*> exprs, | |||
1454 | SourceLocation RParenLoc) { | |||
1455 | void *Mem = C.Allocate( | |||
1456 | totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size())); | |||
1457 | ||||
1458 | return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs, | |||
1459 | RParenLoc); | |||
1460 | } | |||
1461 | ||||
1462 | OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C, | |||
1463 | unsigned numComps, unsigned numExprs) { | |||
1464 | void *Mem = | |||
1465 | C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs)); | |||
1466 | return new (Mem) OffsetOfExpr(numComps, numExprs); | |||
1467 | } | |||
1468 | ||||
1469 | OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type, | |||
1470 | SourceLocation OperatorLoc, TypeSourceInfo *tsi, | |||
1471 | ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs, | |||
1472 | SourceLocation RParenLoc) | |||
1473 | : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary, | |||
1474 | /*TypeDependent=*/false, | |||
1475 | /*ValueDependent=*/tsi->getType()->isDependentType(), | |||
1476 | tsi->getType()->isInstantiationDependentType(), | |||
1477 | tsi->getType()->containsUnexpandedParameterPack()), | |||
1478 | OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi), | |||
1479 | NumComps(comps.size()), NumExprs(exprs.size()) | |||
1480 | { | |||
1481 | for (unsigned i = 0; i != comps.size(); ++i) { | |||
1482 | setComponent(i, comps[i]); | |||
1483 | } | |||
1484 | ||||
1485 | for (unsigned i = 0; i != exprs.size(); ++i) { | |||
1486 | if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent()) | |||
1487 | ExprBits.ValueDependent = true; | |||
1488 | if (exprs[i]->containsUnexpandedParameterPack()) | |||
1489 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
1490 | ||||
1491 | setIndexExpr(i, exprs[i]); | |||
1492 | } | |||
1493 | } | |||
1494 | ||||
1495 | IdentifierInfo *OffsetOfNode::getFieldName() const { | |||
1496 | assert(getKind() == Field || getKind() == Identifier)((getKind() == Field || getKind() == Identifier) ? static_cast <void> (0) : __assert_fail ("getKind() == Field || getKind() == Identifier" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1496, __PRETTY_FUNCTION__)); | |||
1497 | if (getKind() == Field) | |||
1498 | return getField()->getIdentifier(); | |||
1499 | ||||
1500 | return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask); | |||
1501 | } | |||
1502 | ||||
1503 | UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr( | |||
1504 | UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType, | |||
1505 | SourceLocation op, SourceLocation rp) | |||
1506 | : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary, | |||
1507 | false, // Never type-dependent (C++ [temp.dep.expr]p3). | |||
1508 | // Value-dependent if the argument is type-dependent. | |||
1509 | E->isTypeDependent(), E->isInstantiationDependent(), | |||
1510 | E->containsUnexpandedParameterPack()), | |||
1511 | OpLoc(op), RParenLoc(rp) { | |||
1512 | UnaryExprOrTypeTraitExprBits.Kind = ExprKind; | |||
1513 | UnaryExprOrTypeTraitExprBits.IsType = false; | |||
1514 | Argument.Ex = E; | |||
1515 | ||||
1516 | // Check to see if we are in the situation where alignof(decl) should be | |||
1517 | // dependent because decl's alignment is dependent. | |||
1518 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
1519 | if (!isValueDependent() || !isInstantiationDependent()) { | |||
1520 | E = E->IgnoreParens(); | |||
1521 | ||||
1522 | const ValueDecl *D = nullptr; | |||
1523 | if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
1524 | D = DRE->getDecl(); | |||
1525 | else if (const auto *ME = dyn_cast<MemberExpr>(E)) | |||
1526 | D = ME->getMemberDecl(); | |||
1527 | ||||
1528 | if (D) { | |||
1529 | for (const auto *I : D->specific_attrs<AlignedAttr>()) { | |||
1530 | if (I->isAlignmentDependent()) { | |||
1531 | setValueDependent(true); | |||
1532 | setInstantiationDependent(true); | |||
1533 | break; | |||
1534 | } | |||
1535 | } | |||
1536 | } | |||
1537 | } | |||
1538 | } | |||
1539 | } | |||
1540 | ||||
1541 | MemberExpr *MemberExpr::Create( | |||
1542 | const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc, | |||
1543 | NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, | |||
1544 | ValueDecl *memberdecl, DeclAccessPair founddecl, | |||
1545 | DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs, | |||
1546 | QualType ty, ExprValueKind vk, ExprObjectKind ok) { | |||
1547 | ||||
1548 | bool hasQualOrFound = (QualifierLoc || | |||
1549 | founddecl.getDecl() != memberdecl || | |||
1550 | founddecl.getAccess() != memberdecl->getAccess()); | |||
1551 | ||||
1552 | bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid(); | |||
1553 | std::size_t Size = | |||
1554 | totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo, | |||
1555 | TemplateArgumentLoc>(hasQualOrFound ? 1 : 0, | |||
1556 | HasTemplateKWAndArgsInfo ? 1 : 0, | |||
1557 | targs ? targs->size() : 0); | |||
1558 | ||||
1559 | void *Mem = C.Allocate(Size, alignof(MemberExpr)); | |||
1560 | MemberExpr *E = new (Mem) | |||
1561 | MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok); | |||
1562 | ||||
1563 | if (hasQualOrFound) { | |||
1564 | // FIXME: Wrong. We should be looking at the member declaration we found. | |||
1565 | if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) { | |||
1566 | E->setValueDependent(true); | |||
1567 | E->setTypeDependent(true); | |||
1568 | E->setInstantiationDependent(true); | |||
1569 | } | |||
1570 | else if (QualifierLoc && | |||
1571 | QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent()) | |||
1572 | E->setInstantiationDependent(true); | |||
1573 | ||||
1574 | E->MemberExprBits.HasQualifierOrFoundDecl = true; | |||
1575 | ||||
1576 | MemberExprNameQualifier *NQ = | |||
1577 | E->getTrailingObjects<MemberExprNameQualifier>(); | |||
1578 | NQ->QualifierLoc = QualifierLoc; | |||
1579 | NQ->FoundDecl = founddecl; | |||
1580 | } | |||
1581 | ||||
1582 | E->MemberExprBits.HasTemplateKWAndArgsInfo = | |||
1583 | (targs || TemplateKWLoc.isValid()); | |||
1584 | ||||
1585 | if (targs) { | |||
1586 | bool Dependent = false; | |||
1587 | bool InstantiationDependent = false; | |||
1588 | bool ContainsUnexpandedParameterPack = false; | |||
1589 | E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
1590 | TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(), | |||
1591 | Dependent, InstantiationDependent, ContainsUnexpandedParameterPack); | |||
1592 | if (InstantiationDependent) | |||
1593 | E->setInstantiationDependent(true); | |||
1594 | } else if (TemplateKWLoc.isValid()) { | |||
1595 | E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
1596 | TemplateKWLoc); | |||
1597 | } | |||
1598 | ||||
1599 | return E; | |||
1600 | } | |||
1601 | ||||
1602 | SourceLocation MemberExpr::getBeginLoc() const { | |||
1603 | if (isImplicitAccess()) { | |||
1604 | if (hasQualifier()) | |||
1605 | return getQualifierLoc().getBeginLoc(); | |||
1606 | return MemberLoc; | |||
1607 | } | |||
1608 | ||||
1609 | // FIXME: We don't want this to happen. Rather, we should be able to | |||
1610 | // detect all kinds of implicit accesses more cleanly. | |||
1611 | SourceLocation BaseStartLoc = getBase()->getBeginLoc(); | |||
1612 | if (BaseStartLoc.isValid()) | |||
1613 | return BaseStartLoc; | |||
1614 | return MemberLoc; | |||
1615 | } | |||
1616 | SourceLocation MemberExpr::getEndLoc() const { | |||
1617 | SourceLocation EndLoc = getMemberNameInfo().getEndLoc(); | |||
1618 | if (hasExplicitTemplateArgs()) | |||
1619 | EndLoc = getRAngleLoc(); | |||
1620 | else if (EndLoc.isInvalid()) | |||
1621 | EndLoc = getBase()->getEndLoc(); | |||
1622 | return EndLoc; | |||
1623 | } | |||
1624 | ||||
1625 | bool CastExpr::CastConsistency() const { | |||
1626 | switch (getCastKind()) { | |||
1627 | case CK_DerivedToBase: | |||
1628 | case CK_UncheckedDerivedToBase: | |||
1629 | case CK_DerivedToBaseMemberPointer: | |||
1630 | case CK_BaseToDerived: | |||
1631 | case CK_BaseToDerivedMemberPointer: | |||
1632 | assert(!path_empty() && "Cast kind should have a base path!")((!path_empty() && "Cast kind should have a base path!" ) ? static_cast<void> (0) : __assert_fail ("!path_empty() && \"Cast kind should have a base path!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1632, __PRETTY_FUNCTION__)); | |||
1633 | break; | |||
1634 | ||||
1635 | case CK_CPointerToObjCPointerCast: | |||
1636 | assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1636, __PRETTY_FUNCTION__)); | |||
1637 | assert(getSubExpr()->getType()->isPointerType())((getSubExpr()->getType()->isPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1637, __PRETTY_FUNCTION__)); | |||
1638 | goto CheckNoBasePath; | |||
1639 | ||||
1640 | case CK_BlockPointerToObjCPointerCast: | |||
1641 | assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1641, __PRETTY_FUNCTION__)); | |||
1642 | assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1642, __PRETTY_FUNCTION__)); | |||
1643 | goto CheckNoBasePath; | |||
1644 | ||||
1645 | case CK_ReinterpretMemberPointer: | |||
1646 | assert(getType()->isMemberPointerType())((getType()->isMemberPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isMemberPointerType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1646, __PRETTY_FUNCTION__)); | |||
1647 | assert(getSubExpr()->getType()->isMemberPointerType())((getSubExpr()->getType()->isMemberPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1647, __PRETTY_FUNCTION__)); | |||
1648 | goto CheckNoBasePath; | |||
1649 | ||||
1650 | case CK_BitCast: | |||
1651 | // Arbitrary casts to C pointer types count as bitcasts. | |||
1652 | // Otherwise, we should only have block and ObjC pointer casts | |||
1653 | // here if they stay within the type kind. | |||
1654 | if (!getType()->isPointerType()) { | |||
1655 | assert(getType()->isObjCObjectPointerType() ==((getType()->isObjCObjectPointerType() == getSubExpr()-> getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1656, __PRETTY_FUNCTION__)) | |||
1656 | getSubExpr()->getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType() == getSubExpr()-> getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1656, __PRETTY_FUNCTION__)); | |||
1657 | assert(getType()->isBlockPointerType() ==((getType()->isBlockPointerType() == getSubExpr()->getType ()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1658, __PRETTY_FUNCTION__)) | |||
1658 | getSubExpr()->getType()->isBlockPointerType())((getType()->isBlockPointerType() == getSubExpr()->getType ()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1658, __PRETTY_FUNCTION__)); | |||
1659 | } | |||
1660 | goto CheckNoBasePath; | |||
1661 | ||||
1662 | case CK_AnyPointerToBlockPointerCast: | |||
1663 | assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1663, __PRETTY_FUNCTION__)); | |||
1664 | assert(getSubExpr()->getType()->isAnyPointerType() &&((getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1665, __PRETTY_FUNCTION__)) | |||
1665 | !getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1665, __PRETTY_FUNCTION__)); | |||
1666 | goto CheckNoBasePath; | |||
1667 | ||||
1668 | case CK_CopyAndAutoreleaseBlockObject: | |||
1669 | assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1669, __PRETTY_FUNCTION__)); | |||
1670 | assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1670, __PRETTY_FUNCTION__)); | |||
1671 | goto CheckNoBasePath; | |||
1672 | ||||
1673 | case CK_FunctionToPointerDecay: | |||
1674 | assert(getType()->isPointerType())((getType()->isPointerType()) ? static_cast<void> (0 ) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1674, __PRETTY_FUNCTION__)); | |||
1675 | assert(getSubExpr()->getType()->isFunctionType())((getSubExpr()->getType()->isFunctionType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1675, __PRETTY_FUNCTION__)); | |||
1676 | goto CheckNoBasePath; | |||
1677 | ||||
1678 | case CK_AddressSpaceConversion: { | |||
1679 | auto Ty = getType(); | |||
1680 | auto SETy = getSubExpr()->getType(); | |||
1681 | assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy))((getValueKindForType(Ty) == Expr::getValueKindForType(SETy)) ? static_cast<void> (0) : __assert_fail ("getValueKindForType(Ty) == Expr::getValueKindForType(SETy)" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1681, __PRETTY_FUNCTION__)); | |||
1682 | if (/*isRValue()*/ !Ty->getPointeeType().isNull()) { | |||
1683 | Ty = Ty->getPointeeType(); | |||
1684 | SETy = SETy->getPointeeType(); | |||
1685 | } | |||
1686 | assert(!Ty.isNull() && !SETy.isNull() &&((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace () != SETy.getAddressSpace()) ? static_cast<void> (0) : __assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1687, __PRETTY_FUNCTION__)) | |||
1687 | Ty.getAddressSpace() != SETy.getAddressSpace())((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace () != SETy.getAddressSpace()) ? static_cast<void> (0) : __assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1687, __PRETTY_FUNCTION__)); | |||
1688 | goto CheckNoBasePath; | |||
1689 | } | |||
1690 | // These should not have an inheritance path. | |||
1691 | case CK_Dynamic: | |||
1692 | case CK_ToUnion: | |||
1693 | case CK_ArrayToPointerDecay: | |||
1694 | case CK_NullToMemberPointer: | |||
1695 | case CK_NullToPointer: | |||
1696 | case CK_ConstructorConversion: | |||
1697 | case CK_IntegralToPointer: | |||
1698 | case CK_PointerToIntegral: | |||
1699 | case CK_ToVoid: | |||
1700 | case CK_VectorSplat: | |||
1701 | case CK_IntegralCast: | |||
1702 | case CK_BooleanToSignedIntegral: | |||
1703 | case CK_IntegralToFloating: | |||
1704 | case CK_FloatingToIntegral: | |||
1705 | case CK_FloatingCast: | |||
1706 | case CK_ObjCObjectLValueCast: | |||
1707 | case CK_FloatingRealToComplex: | |||
1708 | case CK_FloatingComplexToReal: | |||
1709 | case CK_FloatingComplexCast: | |||
1710 | case CK_FloatingComplexToIntegralComplex: | |||
1711 | case CK_IntegralRealToComplex: | |||
1712 | case CK_IntegralComplexToReal: | |||
1713 | case CK_IntegralComplexCast: | |||
1714 | case CK_IntegralComplexToFloatingComplex: | |||
1715 | case CK_ARCProduceObject: | |||
1716 | case CK_ARCConsumeObject: | |||
1717 | case CK_ARCReclaimReturnedObject: | |||
1718 | case CK_ARCExtendBlockObject: | |||
1719 | case CK_ZeroToOCLOpaqueType: | |||
1720 | case CK_IntToOCLSampler: | |||
1721 | case CK_FixedPointCast: | |||
1722 | case CK_FixedPointToIntegral: | |||
1723 | case CK_IntegralToFixedPoint: | |||
1724 | assert(!getType()->isBooleanType() && "unheralded conversion to bool")((!getType()->isBooleanType() && "unheralded conversion to bool" ) ? static_cast<void> (0) : __assert_fail ("!getType()->isBooleanType() && \"unheralded conversion to bool\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1724, __PRETTY_FUNCTION__)); | |||
1725 | goto CheckNoBasePath; | |||
1726 | ||||
1727 | case CK_Dependent: | |||
1728 | case CK_LValueToRValue: | |||
1729 | case CK_NoOp: | |||
1730 | case CK_AtomicToNonAtomic: | |||
1731 | case CK_NonAtomicToAtomic: | |||
1732 | case CK_PointerToBoolean: | |||
1733 | case CK_IntegralToBoolean: | |||
1734 | case CK_FloatingToBoolean: | |||
1735 | case CK_MemberPointerToBoolean: | |||
1736 | case CK_FloatingComplexToBoolean: | |||
1737 | case CK_IntegralComplexToBoolean: | |||
1738 | case CK_LValueBitCast: // -> bool& | |||
1739 | case CK_UserDefinedConversion: // operator bool() | |||
1740 | case CK_BuiltinFnToFnPtr: | |||
1741 | case CK_FixedPointToBoolean: | |||
1742 | CheckNoBasePath: | |||
1743 | assert(path_empty() && "Cast kind should not have a base path!")((path_empty() && "Cast kind should not have a base path!" ) ? static_cast<void> (0) : __assert_fail ("path_empty() && \"Cast kind should not have a base path!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1743, __PRETTY_FUNCTION__)); | |||
1744 | break; | |||
1745 | } | |||
1746 | return true; | |||
1747 | } | |||
1748 | ||||
1749 | const char *CastExpr::getCastKindName(CastKind CK) { | |||
1750 | switch (CK) { | |||
1751 | #define CAST_OPERATION(Name) case CK_##Name: return #Name; | |||
1752 | #include "clang/AST/OperationKinds.def" | |||
1753 | } | |||
1754 | llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1754); | |||
1755 | } | |||
1756 | ||||
1757 | namespace { | |||
1758 | const Expr *skipImplicitTemporary(const Expr *E) { | |||
1759 | // Skip through reference binding to temporary. | |||
1760 | if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
1761 | E = Materialize->GetTemporaryExpr(); | |||
1762 | ||||
1763 | // Skip any temporary bindings; they're implicit. | |||
1764 | if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E)) | |||
1765 | E = Binder->getSubExpr(); | |||
1766 | ||||
1767 | return E; | |||
1768 | } | |||
1769 | } | |||
1770 | ||||
1771 | Expr *CastExpr::getSubExprAsWritten() { | |||
1772 | const Expr *SubExpr = nullptr; | |||
1773 | const CastExpr *E = this; | |||
1774 | do { | |||
1775 | SubExpr = skipImplicitTemporary(E->getSubExpr()); | |||
1776 | ||||
1777 | // Conversions by constructor and conversion functions have a | |||
1778 | // subexpression describing the call; strip it off. | |||
1779 | if (E->getCastKind() == CK_ConstructorConversion) | |||
1780 | SubExpr = | |||
1781 | skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0)); | |||
1782 | else if (E->getCastKind() == CK_UserDefinedConversion) { | |||
1783 | assert((isa<CXXMemberCallExpr>(SubExpr) ||(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr> (SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion." ) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1785, __PRETTY_FUNCTION__)) | |||
1784 | isa<BlockExpr>(SubExpr)) &&(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr> (SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion." ) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1785, __PRETTY_FUNCTION__)) | |||
1785 | "Unexpected SubExpr for CK_UserDefinedConversion.")(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr> (SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion." ) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1785, __PRETTY_FUNCTION__)); | |||
1786 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr)) | |||
1787 | SubExpr = MCE->getImplicitObjectArgument(); | |||
1788 | } | |||
1789 | ||||
1790 | // If the subexpression we're left with is an implicit cast, look | |||
1791 | // through that, too. | |||
1792 | } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr))); | |||
1793 | ||||
1794 | return const_cast<Expr*>(SubExpr); | |||
1795 | } | |||
1796 | ||||
1797 | NamedDecl *CastExpr::getConversionFunction() const { | |||
1798 | const Expr *SubExpr = nullptr; | |||
1799 | ||||
1800 | for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) { | |||
1801 | SubExpr = skipImplicitTemporary(E->getSubExpr()); | |||
1802 | ||||
1803 | if (E->getCastKind() == CK_ConstructorConversion) | |||
1804 | return cast<CXXConstructExpr>(SubExpr)->getConstructor(); | |||
1805 | ||||
1806 | if (E->getCastKind() == CK_UserDefinedConversion) { | |||
1807 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr)) | |||
1808 | return MCE->getMethodDecl(); | |||
1809 | } | |||
1810 | } | |||
1811 | ||||
1812 | return nullptr; | |||
1813 | } | |||
1814 | ||||
1815 | CXXBaseSpecifier **CastExpr::path_buffer() { | |||
1816 | switch (getStmtClass()) { | |||
1817 | #define ABSTRACT_STMT(x) | |||
1818 | #define CASTEXPR(Type, Base) \ | |||
1819 | case Stmt::Type##Class: \ | |||
1820 | return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>(); | |||
1821 | #define STMT(Type, Base) | |||
1822 | #include "clang/AST/StmtNodes.inc" | |||
1823 | default: | |||
1824 | llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1824); | |||
1825 | } | |||
1826 | } | |||
1827 | ||||
1828 | const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType, | |||
1829 | QualType opType) { | |||
1830 | auto RD = unionType->castAs<RecordType>()->getDecl(); | |||
1831 | return getTargetFieldForToUnionCast(RD, opType); | |||
1832 | } | |||
1833 | ||||
1834 | const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD, | |||
1835 | QualType OpType) { | |||
1836 | auto &Ctx = RD->getASTContext(); | |||
1837 | RecordDecl::field_iterator Field, FieldEnd; | |||
1838 | for (Field = RD->field_begin(), FieldEnd = RD->field_end(); | |||
1839 | Field != FieldEnd; ++Field) { | |||
1840 | if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) && | |||
1841 | !Field->isUnnamedBitfield()) { | |||
1842 | return *Field; | |||
1843 | } | |||
1844 | } | |||
1845 | return nullptr; | |||
1846 | } | |||
1847 | ||||
1848 | ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T, | |||
1849 | CastKind Kind, Expr *Operand, | |||
1850 | const CXXCastPath *BasePath, | |||
1851 | ExprValueKind VK) { | |||
1852 | unsigned PathSize = (BasePath ? BasePath->size() : 0); | |||
1853 | void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize)); | |||
1854 | ImplicitCastExpr *E = | |||
1855 | new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK); | |||
1856 | if (PathSize) | |||
1857 | std::uninitialized_copy_n(BasePath->data(), BasePath->size(), | |||
1858 | E->getTrailingObjects<CXXBaseSpecifier *>()); | |||
1859 | return E; | |||
1860 | } | |||
1861 | ||||
1862 | ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C, | |||
1863 | unsigned PathSize) { | |||
1864 | void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize)); | |||
1865 | return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize); | |||
1866 | } | |||
1867 | ||||
1868 | ||||
1869 | CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T, | |||
1870 | ExprValueKind VK, CastKind K, Expr *Op, | |||
1871 | const CXXCastPath *BasePath, | |||
1872 | TypeSourceInfo *WrittenTy, | |||
1873 | SourceLocation L, SourceLocation R) { | |||
1874 | unsigned PathSize = (BasePath ? BasePath->size() : 0); | |||
1875 | void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize)); | |||
1876 | CStyleCastExpr *E = | |||
1877 | new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R); | |||
1878 | if (PathSize) | |||
1879 | std::uninitialized_copy_n(BasePath->data(), BasePath->size(), | |||
1880 | E->getTrailingObjects<CXXBaseSpecifier *>()); | |||
1881 | return E; | |||
1882 | } | |||
1883 | ||||
1884 | CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C, | |||
1885 | unsigned PathSize) { | |||
1886 | void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize)); | |||
1887 | return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize); | |||
1888 | } | |||
1889 | ||||
1890 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it | |||
1891 | /// corresponds to, e.g. "<<=". | |||
1892 | StringRef BinaryOperator::getOpcodeStr(Opcode Op) { | |||
1893 | switch (Op) { | |||
1894 | #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling; | |||
1895 | #include "clang/AST/OperationKinds.def" | |||
1896 | } | |||
1897 | llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1897); | |||
1898 | } | |||
1899 | ||||
1900 | BinaryOperatorKind | |||
1901 | BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) { | |||
1902 | switch (OO) { | |||
1903 | default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 1903); | |||
1904 | case OO_Plus: return BO_Add; | |||
1905 | case OO_Minus: return BO_Sub; | |||
1906 | case OO_Star: return BO_Mul; | |||
1907 | case OO_Slash: return BO_Div; | |||
1908 | case OO_Percent: return BO_Rem; | |||
1909 | case OO_Caret: return BO_Xor; | |||
1910 | case OO_Amp: return BO_And; | |||
1911 | case OO_Pipe: return BO_Or; | |||
1912 | case OO_Equal: return BO_Assign; | |||
1913 | case OO_Spaceship: return BO_Cmp; | |||
1914 | case OO_Less: return BO_LT; | |||
1915 | case OO_Greater: return BO_GT; | |||
1916 | case OO_PlusEqual: return BO_AddAssign; | |||
1917 | case OO_MinusEqual: return BO_SubAssign; | |||
1918 | case OO_StarEqual: return BO_MulAssign; | |||
1919 | case OO_SlashEqual: return BO_DivAssign; | |||
1920 | case OO_PercentEqual: return BO_RemAssign; | |||
1921 | case OO_CaretEqual: return BO_XorAssign; | |||
1922 | case OO_AmpEqual: return BO_AndAssign; | |||
1923 | case OO_PipeEqual: return BO_OrAssign; | |||
1924 | case OO_LessLess: return BO_Shl; | |||
1925 | case OO_GreaterGreater: return BO_Shr; | |||
1926 | case OO_LessLessEqual: return BO_ShlAssign; | |||
1927 | case OO_GreaterGreaterEqual: return BO_ShrAssign; | |||
1928 | case OO_EqualEqual: return BO_EQ; | |||
1929 | case OO_ExclaimEqual: return BO_NE; | |||
1930 | case OO_LessEqual: return BO_LE; | |||
1931 | case OO_GreaterEqual: return BO_GE; | |||
1932 | case OO_AmpAmp: return BO_LAnd; | |||
1933 | case OO_PipePipe: return BO_LOr; | |||
1934 | case OO_Comma: return BO_Comma; | |||
1935 | case OO_ArrowStar: return BO_PtrMemI; | |||
1936 | } | |||
1937 | } | |||
1938 | ||||
1939 | OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) { | |||
1940 | static const OverloadedOperatorKind OverOps[] = { | |||
1941 | /* .* Cannot be overloaded */OO_None, OO_ArrowStar, | |||
1942 | OO_Star, OO_Slash, OO_Percent, | |||
1943 | OO_Plus, OO_Minus, | |||
1944 | OO_LessLess, OO_GreaterGreater, | |||
1945 | OO_Spaceship, | |||
1946 | OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual, | |||
1947 | OO_EqualEqual, OO_ExclaimEqual, | |||
1948 | OO_Amp, | |||
1949 | OO_Caret, | |||
1950 | OO_Pipe, | |||
1951 | OO_AmpAmp, | |||
1952 | OO_PipePipe, | |||
1953 | OO_Equal, OO_StarEqual, | |||
1954 | OO_SlashEqual, OO_PercentEqual, | |||
1955 | OO_PlusEqual, OO_MinusEqual, | |||
1956 | OO_LessLessEqual, OO_GreaterGreaterEqual, | |||
1957 | OO_AmpEqual, OO_CaretEqual, | |||
1958 | OO_PipeEqual, | |||
1959 | OO_Comma | |||
1960 | }; | |||
1961 | return OverOps[Opc]; | |||
1962 | } | |||
1963 | ||||
1964 | bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx, | |||
1965 | Opcode Opc, | |||
1966 | Expr *LHS, Expr *RHS) { | |||
1967 | if (Opc != BO_Add) | |||
1968 | return false; | |||
1969 | ||||
1970 | // Check that we have one pointer and one integer operand. | |||
1971 | Expr *PExp; | |||
1972 | if (LHS->getType()->isPointerType()) { | |||
1973 | if (!RHS->getType()->isIntegerType()) | |||
1974 | return false; | |||
1975 | PExp = LHS; | |||
1976 | } else if (RHS->getType()->isPointerType()) { | |||
1977 | if (!LHS->getType()->isIntegerType()) | |||
1978 | return false; | |||
1979 | PExp = RHS; | |||
1980 | } else { | |||
1981 | return false; | |||
1982 | } | |||
1983 | ||||
1984 | // Check that the pointer is a nullptr. | |||
1985 | if (!PExp->IgnoreParenCasts() | |||
1986 | ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull)) | |||
1987 | return false; | |||
1988 | ||||
1989 | // Check that the pointee type is char-sized. | |||
1990 | const PointerType *PTy = PExp->getType()->getAs<PointerType>(); | |||
1991 | if (!PTy || !PTy->getPointeeType()->isCharType()) | |||
1992 | return false; | |||
1993 | ||||
1994 | return true; | |||
1995 | } | |||
1996 | ||||
1997 | static QualType getDecayedSourceLocExprType(const ASTContext &Ctx, | |||
1998 | SourceLocExpr::IdentKind Kind) { | |||
1999 | switch (Kind) { | |||
2000 | case SourceLocExpr::File: | |||
2001 | case SourceLocExpr::Function: { | |||
2002 | QualType ArrTy = Ctx.getStringLiteralArrayType(Ctx.CharTy, 0); | |||
2003 | return Ctx.getPointerType(ArrTy->getAsArrayTypeUnsafe()->getElementType()); | |||
2004 | } | |||
2005 | case SourceLocExpr::Line: | |||
2006 | case SourceLocExpr::Column: | |||
2007 | return Ctx.UnsignedIntTy; | |||
2008 | } | |||
2009 | llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2009); | |||
2010 | } | |||
2011 | ||||
2012 | SourceLocExpr::SourceLocExpr(const ASTContext &Ctx, IdentKind Kind, | |||
2013 | SourceLocation BLoc, SourceLocation RParenLoc, | |||
2014 | DeclContext *ParentContext) | |||
2015 | : Expr(SourceLocExprClass, getDecayedSourceLocExprType(Ctx, Kind), | |||
2016 | VK_RValue, OK_Ordinary, false, false, false, false), | |||
2017 | BuiltinLoc(BLoc), RParenLoc(RParenLoc), ParentContext(ParentContext) { | |||
2018 | SourceLocExprBits.Kind = Kind; | |||
2019 | } | |||
2020 | ||||
2021 | StringRef SourceLocExpr::getBuiltinStr() const { | |||
2022 | switch (getIdentKind()) { | |||
2023 | case File: | |||
2024 | return "__builtin_FILE"; | |||
2025 | case Function: | |||
2026 | return "__builtin_FUNCTION"; | |||
2027 | case Line: | |||
2028 | return "__builtin_LINE"; | |||
2029 | case Column: | |||
2030 | return "__builtin_COLUMN"; | |||
2031 | } | |||
2032 | llvm_unreachable("unexpected IdentKind!")::llvm::llvm_unreachable_internal("unexpected IdentKind!", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2032); | |||
2033 | } | |||
2034 | ||||
2035 | APValue SourceLocExpr::EvaluateInContext(const ASTContext &Ctx, | |||
2036 | const Expr *DefaultExpr) const { | |||
2037 | SourceLocation Loc; | |||
2038 | const DeclContext *Context; | |||
2039 | ||||
2040 | std::tie(Loc, | |||
2041 | Context) = [&]() -> std::pair<SourceLocation, const DeclContext *> { | |||
2042 | if (auto *DIE = dyn_cast_or_null<CXXDefaultInitExpr>(DefaultExpr)) | |||
2043 | return {DIE->getUsedLocation(), DIE->getUsedContext()}; | |||
2044 | if (auto *DAE = dyn_cast_or_null<CXXDefaultArgExpr>(DefaultExpr)) | |||
2045 | return {DAE->getUsedLocation(), DAE->getUsedContext()}; | |||
2046 | return {this->getLocation(), this->getParentContext()}; | |||
2047 | }(); | |||
2048 | ||||
2049 | PresumedLoc PLoc = Ctx.getSourceManager().getPresumedLoc( | |||
2050 | Ctx.getSourceManager().getExpansionRange(Loc).getEnd()); | |||
2051 | ||||
2052 | auto MakeStringLiteral = [&](StringRef Tmp) { | |||
2053 | using LValuePathEntry = APValue::LValuePathEntry; | |||
2054 | StringLiteral *Res = Ctx.getPredefinedStringLiteralFromCache(Tmp); | |||
2055 | // Decay the string to a pointer to the first character. | |||
2056 | LValuePathEntry Path[1] = {LValuePathEntry::ArrayIndex(0)}; | |||
2057 | return APValue(Res, CharUnits::Zero(), Path, /*OnePastTheEnd=*/false); | |||
2058 | }; | |||
2059 | ||||
2060 | switch (getIdentKind()) { | |||
2061 | case SourceLocExpr::File: | |||
2062 | return MakeStringLiteral(PLoc.getFilename()); | |||
2063 | case SourceLocExpr::Function: { | |||
2064 | const Decl *CurDecl = dyn_cast_or_null<Decl>(Context); | |||
2065 | return MakeStringLiteral( | |||
2066 | CurDecl ? PredefinedExpr::ComputeName(PredefinedExpr::Function, CurDecl) | |||
2067 | : std::string("")); | |||
2068 | } | |||
2069 | case SourceLocExpr::Line: | |||
2070 | case SourceLocExpr::Column: { | |||
2071 | llvm::APSInt IntVal(Ctx.getIntWidth(Ctx.UnsignedIntTy), | |||
2072 | /*IsUnsigned=*/true); | |||
2073 | IntVal = getIdentKind() == SourceLocExpr::Line ? PLoc.getLine() | |||
2074 | : PLoc.getColumn(); | |||
2075 | return APValue(IntVal); | |||
2076 | } | |||
2077 | } | |||
2078 | llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2078); | |||
2079 | } | |||
2080 | ||||
2081 | InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc, | |||
2082 | ArrayRef<Expr*> initExprs, SourceLocation rbraceloc) | |||
2083 | : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false, | |||
2084 | false, false), | |||
2085 | InitExprs(C, initExprs.size()), | |||
2086 | LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true) | |||
2087 | { | |||
2088 | sawArrayRangeDesignator(false); | |||
2089 | for (unsigned I = 0; I != initExprs.size(); ++I) { | |||
2090 | if (initExprs[I]->isTypeDependent()) | |||
2091 | ExprBits.TypeDependent = true; | |||
2092 | if (initExprs[I]->isValueDependent()) | |||
2093 | ExprBits.ValueDependent = true; | |||
2094 | if (initExprs[I]->isInstantiationDependent()) | |||
2095 | ExprBits.InstantiationDependent = true; | |||
2096 | if (initExprs[I]->containsUnexpandedParameterPack()) | |||
2097 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
2098 | } | |||
2099 | ||||
2100 | InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end()); | |||
2101 | } | |||
2102 | ||||
2103 | void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) { | |||
2104 | if (NumInits > InitExprs.size()) | |||
2105 | InitExprs.reserve(C, NumInits); | |||
2106 | } | |||
2107 | ||||
2108 | void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) { | |||
2109 | InitExprs.resize(C, NumInits, nullptr); | |||
2110 | } | |||
2111 | ||||
2112 | Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) { | |||
2113 | if (Init >= InitExprs.size()) { | |||
2114 | InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr); | |||
2115 | setInit(Init, expr); | |||
2116 | return nullptr; | |||
2117 | } | |||
2118 | ||||
2119 | Expr *Result = cast_or_null<Expr>(InitExprs[Init]); | |||
2120 | setInit(Init, expr); | |||
2121 | return Result; | |||
2122 | } | |||
2123 | ||||
2124 | void InitListExpr::setArrayFiller(Expr *filler) { | |||
2125 | assert(!hasArrayFiller() && "Filler already set!")((!hasArrayFiller() && "Filler already set!") ? static_cast <void> (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2125, __PRETTY_FUNCTION__)); | |||
2126 | ArrayFillerOrUnionFieldInit = filler; | |||
2127 | // Fill out any "holes" in the array due to designated initializers. | |||
2128 | Expr **inits = getInits(); | |||
2129 | for (unsigned i = 0, e = getNumInits(); i != e; ++i) | |||
2130 | if (inits[i] == nullptr) | |||
2131 | inits[i] = filler; | |||
2132 | } | |||
2133 | ||||
2134 | bool InitListExpr::isStringLiteralInit() const { | |||
2135 | if (getNumInits() != 1) | |||
2136 | return false; | |||
2137 | const ArrayType *AT = getType()->getAsArrayTypeUnsafe(); | |||
2138 | if (!AT || !AT->getElementType()->isIntegerType()) | |||
2139 | return false; | |||
2140 | // It is possible for getInit() to return null. | |||
2141 | const Expr *Init = getInit(0); | |||
2142 | if (!Init) | |||
2143 | return false; | |||
2144 | Init = Init->IgnoreParens(); | |||
2145 | return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init); | |||
2146 | } | |||
2147 | ||||
2148 | bool InitListExpr::isTransparent() const { | |||
2149 | assert(isSemanticForm() && "syntactic form never semantically transparent")((isSemanticForm() && "syntactic form never semantically transparent" ) ? static_cast<void> (0) : __assert_fail ("isSemanticForm() && \"syntactic form never semantically transparent\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2149, __PRETTY_FUNCTION__)); | |||
2150 | ||||
2151 | // A glvalue InitListExpr is always just sugar. | |||
2152 | if (isGLValue()) { | |||
2153 | assert(getNumInits() == 1 && "multiple inits in glvalue init list")((getNumInits() == 1 && "multiple inits in glvalue init list" ) ? static_cast<void> (0) : __assert_fail ("getNumInits() == 1 && \"multiple inits in glvalue init list\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2153, __PRETTY_FUNCTION__)); | |||
2154 | return true; | |||
2155 | } | |||
2156 | ||||
2157 | // Otherwise, we're sugar if and only if we have exactly one initializer that | |||
2158 | // is of the same type. | |||
2159 | if (getNumInits() != 1 || !getInit(0)) | |||
2160 | return false; | |||
2161 | ||||
2162 | // Don't confuse aggregate initialization of a struct X { X &x; }; with a | |||
2163 | // transparent struct copy. | |||
2164 | if (!getInit(0)->isRValue() && getType()->isRecordType()) | |||
2165 | return false; | |||
2166 | ||||
2167 | return getType().getCanonicalType() == | |||
2168 | getInit(0)->getType().getCanonicalType(); | |||
2169 | } | |||
2170 | ||||
2171 | bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const { | |||
2172 | assert(isSyntacticForm() && "only test syntactic form as zero initializer")((isSyntacticForm() && "only test syntactic form as zero initializer" ) ? static_cast<void> (0) : __assert_fail ("isSyntacticForm() && \"only test syntactic form as zero initializer\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2172, __PRETTY_FUNCTION__)); | |||
2173 | ||||
2174 | if (LangOpts.CPlusPlus || getNumInits() != 1) { | |||
2175 | return false; | |||
2176 | } | |||
2177 | ||||
2178 | const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0)); | |||
2179 | return Lit && Lit->getValue() == 0; | |||
2180 | } | |||
2181 | ||||
2182 | SourceLocation InitListExpr::getBeginLoc() const { | |||
2183 | if (InitListExpr *SyntacticForm = getSyntacticForm()) | |||
2184 | return SyntacticForm->getBeginLoc(); | |||
2185 | SourceLocation Beg = LBraceLoc; | |||
2186 | if (Beg.isInvalid()) { | |||
2187 | // Find the first non-null initializer. | |||
2188 | for (InitExprsTy::const_iterator I = InitExprs.begin(), | |||
2189 | E = InitExprs.end(); | |||
2190 | I != E; ++I) { | |||
2191 | if (Stmt *S = *I) { | |||
2192 | Beg = S->getBeginLoc(); | |||
2193 | break; | |||
2194 | } | |||
2195 | } | |||
2196 | } | |||
2197 | return Beg; | |||
2198 | } | |||
2199 | ||||
2200 | SourceLocation InitListExpr::getEndLoc() const { | |||
2201 | if (InitListExpr *SyntacticForm = getSyntacticForm()) | |||
2202 | return SyntacticForm->getEndLoc(); | |||
2203 | SourceLocation End = RBraceLoc; | |||
2204 | if (End.isInvalid()) { | |||
2205 | // Find the first non-null initializer from the end. | |||
2206 | for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(), | |||
2207 | E = InitExprs.rend(); | |||
2208 | I != E; ++I) { | |||
2209 | if (Stmt *S = *I) { | |||
2210 | End = S->getEndLoc(); | |||
2211 | break; | |||
2212 | } | |||
2213 | } | |||
2214 | } | |||
2215 | return End; | |||
2216 | } | |||
2217 | ||||
2218 | /// getFunctionType - Return the underlying function type for this block. | |||
2219 | /// | |||
2220 | const FunctionProtoType *BlockExpr::getFunctionType() const { | |||
2221 | // The block pointer is never sugared, but the function type might be. | |||
2222 | return cast<BlockPointerType>(getType()) | |||
2223 | ->getPointeeType()->castAs<FunctionProtoType>(); | |||
2224 | } | |||
2225 | ||||
2226 | SourceLocation BlockExpr::getCaretLocation() const { | |||
2227 | return TheBlock->getCaretLocation(); | |||
2228 | } | |||
2229 | const Stmt *BlockExpr::getBody() const { | |||
2230 | return TheBlock->getBody(); | |||
2231 | } | |||
2232 | Stmt *BlockExpr::getBody() { | |||
2233 | return TheBlock->getBody(); | |||
2234 | } | |||
2235 | ||||
2236 | ||||
2237 | //===----------------------------------------------------------------------===// | |||
2238 | // Generic Expression Routines | |||
2239 | //===----------------------------------------------------------------------===// | |||
2240 | ||||
2241 | /// isUnusedResultAWarning - Return true if this immediate expression should | |||
2242 | /// be warned about if the result is unused. If so, fill in Loc and Ranges | |||
2243 | /// with location to warn on and the source range[s] to report with the | |||
2244 | /// warning. | |||
2245 | bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc, | |||
2246 | SourceRange &R1, SourceRange &R2, | |||
2247 | ASTContext &Ctx) const { | |||
2248 | // Don't warn if the expr is type dependent. The type could end up | |||
2249 | // instantiating to void. | |||
2250 | if (isTypeDependent()) | |||
2251 | return false; | |||
2252 | ||||
2253 | switch (getStmtClass()) { | |||
2254 | default: | |||
2255 | if (getType()->isVoidType()) | |||
2256 | return false; | |||
2257 | WarnE = this; | |||
2258 | Loc = getExprLoc(); | |||
2259 | R1 = getSourceRange(); | |||
2260 | return true; | |||
2261 | case ParenExprClass: | |||
2262 | return cast<ParenExpr>(this)->getSubExpr()-> | |||
2263 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2264 | case GenericSelectionExprClass: | |||
2265 | return cast<GenericSelectionExpr>(this)->getResultExpr()-> | |||
2266 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2267 | case CoawaitExprClass: | |||
2268 | case CoyieldExprClass: | |||
2269 | return cast<CoroutineSuspendExpr>(this)->getResumeExpr()-> | |||
2270 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2271 | case ChooseExprClass: | |||
2272 | return cast<ChooseExpr>(this)->getChosenSubExpr()-> | |||
2273 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2274 | case UnaryOperatorClass: { | |||
2275 | const UnaryOperator *UO = cast<UnaryOperator>(this); | |||
2276 | ||||
2277 | switch (UO->getOpcode()) { | |||
2278 | case UO_Plus: | |||
2279 | case UO_Minus: | |||
2280 | case UO_AddrOf: | |||
2281 | case UO_Not: | |||
2282 | case UO_LNot: | |||
2283 | case UO_Deref: | |||
2284 | break; | |||
2285 | case UO_Coawait: | |||
2286 | // This is just the 'operator co_await' call inside the guts of a | |||
2287 | // dependent co_await call. | |||
2288 | case UO_PostInc: | |||
2289 | case UO_PostDec: | |||
2290 | case UO_PreInc: | |||
2291 | case UO_PreDec: // ++/-- | |||
2292 | return false; // Not a warning. | |||
2293 | case UO_Real: | |||
2294 | case UO_Imag: | |||
2295 | // accessing a piece of a volatile complex is a side-effect. | |||
2296 | if (Ctx.getCanonicalType(UO->getSubExpr()->getType()) | |||
2297 | .isVolatileQualified()) | |||
2298 | return false; | |||
2299 | break; | |||
2300 | case UO_Extension: | |||
2301 | return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2302 | } | |||
2303 | WarnE = this; | |||
2304 | Loc = UO->getOperatorLoc(); | |||
2305 | R1 = UO->getSubExpr()->getSourceRange(); | |||
2306 | return true; | |||
2307 | } | |||
2308 | case BinaryOperatorClass: { | |||
2309 | const BinaryOperator *BO = cast<BinaryOperator>(this); | |||
2310 | switch (BO->getOpcode()) { | |||
2311 | default: | |||
2312 | break; | |||
2313 | // Consider the RHS of comma for side effects. LHS was checked by | |||
2314 | // Sema::CheckCommaOperands. | |||
2315 | case BO_Comma: | |||
2316 | // ((foo = <blah>), 0) is an idiom for hiding the result (and | |||
2317 | // lvalue-ness) of an assignment written in a macro. | |||
2318 | if (IntegerLiteral *IE = | |||
2319 | dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens())) | |||
2320 | if (IE->getValue() == 0) | |||
2321 | return false; | |||
2322 | return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2323 | // Consider '||', '&&' to have side effects if the LHS or RHS does. | |||
2324 | case BO_LAnd: | |||
2325 | case BO_LOr: | |||
2326 | if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) || | |||
2327 | !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) | |||
2328 | return false; | |||
2329 | break; | |||
2330 | } | |||
2331 | if (BO->isAssignmentOp()) | |||
2332 | return false; | |||
2333 | WarnE = this; | |||
2334 | Loc = BO->getOperatorLoc(); | |||
2335 | R1 = BO->getLHS()->getSourceRange(); | |||
2336 | R2 = BO->getRHS()->getSourceRange(); | |||
2337 | return true; | |||
2338 | } | |||
2339 | case CompoundAssignOperatorClass: | |||
2340 | case VAArgExprClass: | |||
2341 | case AtomicExprClass: | |||
2342 | return false; | |||
2343 | ||||
2344 | case ConditionalOperatorClass: { | |||
2345 | // If only one of the LHS or RHS is a warning, the operator might | |||
2346 | // be being used for control flow. Only warn if both the LHS and | |||
2347 | // RHS are warnings. | |||
2348 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); | |||
2349 | if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) | |||
2350 | return false; | |||
2351 | if (!Exp->getLHS()) | |||
2352 | return true; | |||
2353 | return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2354 | } | |||
2355 | ||||
2356 | case MemberExprClass: | |||
2357 | WarnE = this; | |||
2358 | Loc = cast<MemberExpr>(this)->getMemberLoc(); | |||
2359 | R1 = SourceRange(Loc, Loc); | |||
2360 | R2 = cast<MemberExpr>(this)->getBase()->getSourceRange(); | |||
2361 | return true; | |||
2362 | ||||
2363 | case ArraySubscriptExprClass: | |||
2364 | WarnE = this; | |||
2365 | Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc(); | |||
2366 | R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange(); | |||
2367 | R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange(); | |||
2368 | return true; | |||
2369 | ||||
2370 | case CXXOperatorCallExprClass: { | |||
2371 | // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator | |||
2372 | // overloads as there is no reasonable way to define these such that they | |||
2373 | // have non-trivial, desirable side-effects. See the -Wunused-comparison | |||
2374 | // warning: operators == and != are commonly typo'ed, and so warning on them | |||
2375 | // provides additional value as well. If this list is updated, | |||
2376 | // DiagnoseUnusedComparison should be as well. | |||
2377 | const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this); | |||
2378 | switch (Op->getOperator()) { | |||
2379 | default: | |||
2380 | break; | |||
2381 | case OO_EqualEqual: | |||
2382 | case OO_ExclaimEqual: | |||
2383 | case OO_Less: | |||
2384 | case OO_Greater: | |||
2385 | case OO_GreaterEqual: | |||
2386 | case OO_LessEqual: | |||
2387 | if (Op->getCallReturnType(Ctx)->isReferenceType() || | |||
2388 | Op->getCallReturnType(Ctx)->isVoidType()) | |||
2389 | break; | |||
2390 | WarnE = this; | |||
2391 | Loc = Op->getOperatorLoc(); | |||
2392 | R1 = Op->getSourceRange(); | |||
2393 | return true; | |||
2394 | } | |||
2395 | ||||
2396 | // Fallthrough for generic call handling. | |||
2397 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
2398 | } | |||
2399 | case CallExprClass: | |||
2400 | case CXXMemberCallExprClass: | |||
2401 | case UserDefinedLiteralClass: { | |||
2402 | // If this is a direct call, get the callee. | |||
2403 | const CallExpr *CE = cast<CallExpr>(this); | |||
2404 | if (const Decl *FD = CE->getCalleeDecl()) { | |||
2405 | // If the callee has attribute pure, const, or warn_unused_result, warn | |||
2406 | // about it. void foo() { strlen("bar"); } should warn. | |||
2407 | // | |||
2408 | // Note: If new cases are added here, DiagnoseUnusedExprResult should be | |||
2409 | // updated to match for QoI. | |||
2410 | if (CE->hasUnusedResultAttr(Ctx) || | |||
2411 | FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) { | |||
2412 | WarnE = this; | |||
2413 | Loc = CE->getCallee()->getBeginLoc(); | |||
2414 | R1 = CE->getCallee()->getSourceRange(); | |||
2415 | ||||
2416 | if (unsigned NumArgs = CE->getNumArgs()) | |||
2417 | R2 = SourceRange(CE->getArg(0)->getBeginLoc(), | |||
2418 | CE->getArg(NumArgs - 1)->getEndLoc()); | |||
2419 | return true; | |||
2420 | } | |||
2421 | } | |||
2422 | return false; | |||
2423 | } | |||
2424 | ||||
2425 | // If we don't know precisely what we're looking at, let's not warn. | |||
2426 | case UnresolvedLookupExprClass: | |||
2427 | case CXXUnresolvedConstructExprClass: | |||
2428 | return false; | |||
2429 | ||||
2430 | case CXXTemporaryObjectExprClass: | |||
2431 | case CXXConstructExprClass: { | |||
2432 | if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) { | |||
2433 | if (Type->hasAttr<WarnUnusedAttr>()) { | |||
2434 | WarnE = this; | |||
2435 | Loc = getBeginLoc(); | |||
2436 | R1 = getSourceRange(); | |||
2437 | return true; | |||
2438 | } | |||
2439 | } | |||
2440 | return false; | |||
2441 | } | |||
2442 | ||||
2443 | case ObjCMessageExprClass: { | |||
2444 | const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this); | |||
2445 | if (Ctx.getLangOpts().ObjCAutoRefCount && | |||
2446 | ME->isInstanceMessage() && | |||
2447 | !ME->getType()->isVoidType() && | |||
2448 | ME->getMethodFamily() == OMF_init) { | |||
2449 | WarnE = this; | |||
2450 | Loc = getExprLoc(); | |||
2451 | R1 = ME->getSourceRange(); | |||
2452 | return true; | |||
2453 | } | |||
2454 | ||||
2455 | if (const ObjCMethodDecl *MD = ME->getMethodDecl()) | |||
2456 | if (MD->hasAttr<WarnUnusedResultAttr>()) { | |||
2457 | WarnE = this; | |||
2458 | Loc = getExprLoc(); | |||
2459 | return true; | |||
2460 | } | |||
2461 | ||||
2462 | return false; | |||
2463 | } | |||
2464 | ||||
2465 | case ObjCPropertyRefExprClass: | |||
2466 | WarnE = this; | |||
2467 | Loc = getExprLoc(); | |||
2468 | R1 = getSourceRange(); | |||
2469 | return true; | |||
2470 | ||||
2471 | case PseudoObjectExprClass: { | |||
2472 | const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); | |||
2473 | ||||
2474 | // Only complain about things that have the form of a getter. | |||
2475 | if (isa<UnaryOperator>(PO->getSyntacticForm()) || | |||
2476 | isa<BinaryOperator>(PO->getSyntacticForm())) | |||
2477 | return false; | |||
2478 | ||||
2479 | WarnE = this; | |||
2480 | Loc = getExprLoc(); | |||
2481 | R1 = getSourceRange(); | |||
2482 | return true; | |||
2483 | } | |||
2484 | ||||
2485 | case StmtExprClass: { | |||
2486 | // Statement exprs don't logically have side effects themselves, but are | |||
2487 | // sometimes used in macros in ways that give them a type that is unused. | |||
2488 | // For example ({ blah; foo(); }) will end up with a type if foo has a type. | |||
2489 | // however, if the result of the stmt expr is dead, we don't want to emit a | |||
2490 | // warning. | |||
2491 | const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); | |||
2492 | if (!CS->body_empty()) { | |||
2493 | if (const Expr *E = dyn_cast<Expr>(CS->body_back())) | |||
2494 | return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2495 | if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back())) | |||
2496 | if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt())) | |||
2497 | return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2498 | } | |||
2499 | ||||
2500 | if (getType()->isVoidType()) | |||
2501 | return false; | |||
2502 | WarnE = this; | |||
2503 | Loc = cast<StmtExpr>(this)->getLParenLoc(); | |||
2504 | R1 = getSourceRange(); | |||
2505 | return true; | |||
2506 | } | |||
2507 | case CXXFunctionalCastExprClass: | |||
2508 | case CStyleCastExprClass: { | |||
2509 | // Ignore an explicit cast to void unless the operand is a non-trivial | |||
2510 | // volatile lvalue. | |||
2511 | const CastExpr *CE = cast<CastExpr>(this); | |||
2512 | if (CE->getCastKind() == CK_ToVoid) { | |||
2513 | if (CE->getSubExpr()->isGLValue() && | |||
2514 | CE->getSubExpr()->getType().isVolatileQualified()) { | |||
2515 | const DeclRefExpr *DRE = | |||
2516 | dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens()); | |||
2517 | if (!(DRE && isa<VarDecl>(DRE->getDecl()) && | |||
2518 | cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) && | |||
2519 | !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) { | |||
2520 | return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, | |||
2521 | R1, R2, Ctx); | |||
2522 | } | |||
2523 | } | |||
2524 | return false; | |||
2525 | } | |||
2526 | ||||
2527 | // If this is a cast to a constructor conversion, check the operand. | |||
2528 | // Otherwise, the result of the cast is unused. | |||
2529 | if (CE->getCastKind() == CK_ConstructorConversion) | |||
2530 | return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2531 | ||||
2532 | WarnE = this; | |||
2533 | if (const CXXFunctionalCastExpr *CXXCE = | |||
2534 | dyn_cast<CXXFunctionalCastExpr>(this)) { | |||
2535 | Loc = CXXCE->getBeginLoc(); | |||
2536 | R1 = CXXCE->getSubExpr()->getSourceRange(); | |||
2537 | } else { | |||
2538 | const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this); | |||
2539 | Loc = CStyleCE->getLParenLoc(); | |||
2540 | R1 = CStyleCE->getSubExpr()->getSourceRange(); | |||
2541 | } | |||
2542 | return true; | |||
2543 | } | |||
2544 | case ImplicitCastExprClass: { | |||
2545 | const CastExpr *ICE = cast<ImplicitCastExpr>(this); | |||
2546 | ||||
2547 | // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect. | |||
2548 | if (ICE->getCastKind() == CK_LValueToRValue && | |||
2549 | ICE->getSubExpr()->getType().isVolatileQualified()) | |||
2550 | return false; | |||
2551 | ||||
2552 | return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2553 | } | |||
2554 | case CXXDefaultArgExprClass: | |||
2555 | return (cast<CXXDefaultArgExpr>(this) | |||
2556 | ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); | |||
2557 | case CXXDefaultInitExprClass: | |||
2558 | return (cast<CXXDefaultInitExpr>(this) | |||
2559 | ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); | |||
2560 | ||||
2561 | case CXXNewExprClass: | |||
2562 | // FIXME: In theory, there might be new expressions that don't have side | |||
2563 | // effects (e.g. a placement new with an uninitialized POD). | |||
2564 | case CXXDeleteExprClass: | |||
2565 | return false; | |||
2566 | case MaterializeTemporaryExprClass: | |||
2567 | return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr() | |||
2568 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2569 | case CXXBindTemporaryExprClass: | |||
2570 | return cast<CXXBindTemporaryExpr>(this)->getSubExpr() | |||
2571 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2572 | case ExprWithCleanupsClass: | |||
2573 | return cast<ExprWithCleanups>(this)->getSubExpr() | |||
2574 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2575 | } | |||
2576 | } | |||
2577 | ||||
2578 | /// isOBJCGCCandidate - Check if an expression is objc gc'able. | |||
2579 | /// returns true, if it is; false otherwise. | |||
2580 | bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const { | |||
2581 | const Expr *E = IgnoreParens(); | |||
2582 | switch (E->getStmtClass()) { | |||
2583 | default: | |||
2584 | return false; | |||
2585 | case ObjCIvarRefExprClass: | |||
2586 | return true; | |||
2587 | case Expr::UnaryOperatorClass: | |||
2588 | return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2589 | case ImplicitCastExprClass: | |||
2590 | return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2591 | case MaterializeTemporaryExprClass: | |||
2592 | return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr() | |||
2593 | ->isOBJCGCCandidate(Ctx); | |||
2594 | case CStyleCastExprClass: | |||
2595 | return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2596 | case DeclRefExprClass: { | |||
2597 | const Decl *D = cast<DeclRefExpr>(E)->getDecl(); | |||
2598 | ||||
2599 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | |||
2600 | if (VD->hasGlobalStorage()) | |||
2601 | return true; | |||
2602 | QualType T = VD->getType(); | |||
2603 | // dereferencing to a pointer is always a gc'able candidate, | |||
2604 | // unless it is __weak. | |||
2605 | return T->isPointerType() && | |||
2606 | (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak); | |||
2607 | } | |||
2608 | return false; | |||
2609 | } | |||
2610 | case MemberExprClass: { | |||
2611 | const MemberExpr *M = cast<MemberExpr>(E); | |||
2612 | return M->getBase()->isOBJCGCCandidate(Ctx); | |||
2613 | } | |||
2614 | case ArraySubscriptExprClass: | |||
2615 | return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx); | |||
2616 | } | |||
2617 | } | |||
2618 | ||||
2619 | bool Expr::isBoundMemberFunction(ASTContext &Ctx) const { | |||
2620 | if (isTypeDependent()) | |||
2621 | return false; | |||
2622 | return ClassifyLValue(Ctx) == Expr::LV_MemberFunction; | |||
2623 | } | |||
2624 | ||||
2625 | QualType Expr::findBoundMemberType(const Expr *expr) { | |||
2626 | assert(expr->hasPlaceholderType(BuiltinType::BoundMember))((expr->hasPlaceholderType(BuiltinType::BoundMember)) ? static_cast <void> (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2626, __PRETTY_FUNCTION__)); | |||
2627 | ||||
2628 | // Bound member expressions are always one of these possibilities: | |||
2629 | // x->m x.m x->*y x.*y | |||
2630 | // (possibly parenthesized) | |||
2631 | ||||
2632 | expr = expr->IgnoreParens(); | |||
2633 | if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) { | |||
2634 | assert(isa<CXXMethodDecl>(mem->getMemberDecl()))((isa<CXXMethodDecl>(mem->getMemberDecl())) ? static_cast <void> (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2634, __PRETTY_FUNCTION__)); | |||
2635 | return mem->getMemberDecl()->getType(); | |||
2636 | } | |||
2637 | ||||
2638 | if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) { | |||
2639 | QualType type = op->getRHS()->getType()->castAs<MemberPointerType>() | |||
2640 | ->getPointeeType(); | |||
2641 | assert(type->isFunctionType())((type->isFunctionType()) ? static_cast<void> (0) : __assert_fail ("type->isFunctionType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2641, __PRETTY_FUNCTION__)); | |||
2642 | return type; | |||
2643 | } | |||
2644 | ||||
2645 | assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr))((isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr >(expr)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr)" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2645, __PRETTY_FUNCTION__)); | |||
2646 | return QualType(); | |||
2647 | } | |||
2648 | ||||
2649 | static Expr *IgnoreImpCastsSingleStep(Expr *E) { | |||
2650 | if (auto *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
2651 | return ICE->getSubExpr(); | |||
2652 | ||||
2653 | if (auto *FE = dyn_cast<FullExpr>(E)) | |||
2654 | return FE->getSubExpr(); | |||
2655 | ||||
2656 | return E; | |||
2657 | } | |||
2658 | ||||
2659 | static Expr *IgnoreImpCastsExtraSingleStep(Expr *E) { | |||
2660 | // FIXME: Skip MaterializeTemporaryExpr and SubstNonTypeTemplateParmExpr in | |||
2661 | // addition to what IgnoreImpCasts() skips to account for the current | |||
2662 | // behaviour of IgnoreParenImpCasts(). | |||
2663 | Expr *SubE = IgnoreImpCastsSingleStep(E); | |||
2664 | if (SubE != E) | |||
2665 | return SubE; | |||
2666 | ||||
2667 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2668 | return MTE->GetTemporaryExpr(); | |||
2669 | ||||
2670 | if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) | |||
2671 | return NTTP->getReplacement(); | |||
2672 | ||||
2673 | return E; | |||
2674 | } | |||
2675 | ||||
2676 | static Expr *IgnoreCastsSingleStep(Expr *E) { | |||
2677 | if (auto *CE = dyn_cast<CastExpr>(E)) | |||
2678 | return CE->getSubExpr(); | |||
2679 | ||||
2680 | if (auto *FE = dyn_cast<FullExpr>(E)) | |||
2681 | return FE->getSubExpr(); | |||
2682 | ||||
2683 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2684 | return MTE->GetTemporaryExpr(); | |||
2685 | ||||
2686 | if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) | |||
2687 | return NTTP->getReplacement(); | |||
2688 | ||||
2689 | return E; | |||
2690 | } | |||
2691 | ||||
2692 | static Expr *IgnoreLValueCastsSingleStep(Expr *E) { | |||
2693 | // Skip what IgnoreCastsSingleStep skips, except that only | |||
2694 | // lvalue-to-rvalue casts are skipped. | |||
2695 | if (auto *CE = dyn_cast<CastExpr>(E)) | |||
2696 | if (CE->getCastKind() != CK_LValueToRValue) | |||
2697 | return E; | |||
2698 | ||||
2699 | return IgnoreCastsSingleStep(E); | |||
2700 | } | |||
2701 | ||||
2702 | static Expr *IgnoreBaseCastsSingleStep(Expr *E) { | |||
2703 | if (auto *CE = dyn_cast<CastExpr>(E)) | |||
2704 | if (CE->getCastKind() == CK_DerivedToBase || | |||
2705 | CE->getCastKind() == CK_UncheckedDerivedToBase || | |||
2706 | CE->getCastKind() == CK_NoOp) | |||
2707 | return CE->getSubExpr(); | |||
2708 | ||||
2709 | return E; | |||
2710 | } | |||
2711 | ||||
2712 | static Expr *IgnoreImplicitSingleStep(Expr *E) { | |||
2713 | Expr *SubE = IgnoreImpCastsSingleStep(E); | |||
2714 | if (SubE != E) | |||
2715 | return SubE; | |||
2716 | ||||
2717 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2718 | return MTE->GetTemporaryExpr(); | |||
2719 | ||||
2720 | if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(E)) | |||
2721 | return BTE->getSubExpr(); | |||
2722 | ||||
2723 | return E; | |||
2724 | } | |||
2725 | ||||
2726 | static Expr *IgnoreParensSingleStep(Expr *E) { | |||
2727 | if (auto *PE = dyn_cast<ParenExpr>(E)) | |||
2728 | return PE->getSubExpr(); | |||
2729 | ||||
2730 | if (auto *UO = dyn_cast<UnaryOperator>(E)) { | |||
2731 | if (UO->getOpcode() == UO_Extension) | |||
2732 | return UO->getSubExpr(); | |||
2733 | } | |||
2734 | ||||
2735 | else if (auto *GSE = dyn_cast<GenericSelectionExpr>(E)) { | |||
2736 | if (!GSE->isResultDependent()) | |||
2737 | return GSE->getResultExpr(); | |||
2738 | } | |||
2739 | ||||
2740 | else if (auto *CE = dyn_cast<ChooseExpr>(E)) { | |||
2741 | if (!CE->isConditionDependent()) | |||
2742 | return CE->getChosenSubExpr(); | |||
2743 | } | |||
2744 | ||||
2745 | else if (auto *CE = dyn_cast<ConstantExpr>(E)) | |||
2746 | return CE->getSubExpr(); | |||
2747 | ||||
2748 | return E; | |||
2749 | } | |||
2750 | ||||
2751 | static Expr *IgnoreNoopCastsSingleStep(const ASTContext &Ctx, Expr *E) { | |||
2752 | if (auto *CE = dyn_cast<CastExpr>(E)) { | |||
2753 | // We ignore integer <-> casts that are of the same width, ptr<->ptr and | |||
2754 | // ptr<->int casts of the same width. We also ignore all identity casts. | |||
2755 | Expr *SubExpr = CE->getSubExpr(); | |||
2756 | bool IsIdentityCast = | |||
2757 | Ctx.hasSameUnqualifiedType(E->getType(), SubExpr->getType()); | |||
2758 | bool IsSameWidthCast = | |||
2759 | (E->getType()->isPointerType() || E->getType()->isIntegralType(Ctx)) && | |||
2760 | (SubExpr->getType()->isPointerType() || | |||
2761 | SubExpr->getType()->isIntegralType(Ctx)) && | |||
2762 | (Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SubExpr->getType())); | |||
2763 | ||||
2764 | if (IsIdentityCast || IsSameWidthCast) | |||
2765 | return SubExpr; | |||
2766 | } | |||
2767 | ||||
2768 | else if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) | |||
2769 | return NTTP->getReplacement(); | |||
2770 | ||||
2771 | return E; | |||
2772 | } | |||
2773 | ||||
2774 | static Expr *IgnoreExprNodesImpl(Expr *E) { return E; } | |||
2775 | template <typename FnTy, typename... FnTys> | |||
2776 | static Expr *IgnoreExprNodesImpl(Expr *E, FnTy &&Fn, FnTys &&... Fns) { | |||
2777 | return IgnoreExprNodesImpl(Fn(E), std::forward<FnTys>(Fns)...); | |||
2778 | } | |||
2779 | ||||
2780 | /// Given an expression E and functions Fn_1,...,Fn_n : Expr * -> Expr *, | |||
2781 | /// Recursively apply each of the functions to E until reaching a fixed point. | |||
2782 | /// Note that a null E is valid; in this case nothing is done. | |||
2783 | template <typename... FnTys> | |||
2784 | static Expr *IgnoreExprNodes(Expr *E, FnTys &&... Fns) { | |||
2785 | Expr *LastE = nullptr; | |||
2786 | while (E != LastE) { | |||
2787 | LastE = E; | |||
2788 | E = IgnoreExprNodesImpl(E, std::forward<FnTys>(Fns)...); | |||
2789 | } | |||
2790 | return E; | |||
2791 | } | |||
2792 | ||||
2793 | Expr *Expr::IgnoreImpCasts() { | |||
2794 | return IgnoreExprNodes(this, IgnoreImpCastsSingleStep); | |||
2795 | } | |||
2796 | ||||
2797 | Expr *Expr::IgnoreCasts() { | |||
2798 | return IgnoreExprNodes(this, IgnoreCastsSingleStep); | |||
2799 | } | |||
2800 | ||||
2801 | Expr *Expr::IgnoreImplicit() { | |||
2802 | return IgnoreExprNodes(this, IgnoreImplicitSingleStep); | |||
2803 | } | |||
2804 | ||||
2805 | Expr *Expr::IgnoreParens() { | |||
2806 | return IgnoreExprNodes(this, IgnoreParensSingleStep); | |||
2807 | } | |||
2808 | ||||
2809 | Expr *Expr::IgnoreParenImpCasts() { | |||
2810 | return IgnoreExprNodes(this, IgnoreParensSingleStep, | |||
2811 | IgnoreImpCastsExtraSingleStep); | |||
2812 | } | |||
2813 | ||||
2814 | Expr *Expr::IgnoreParenCasts() { | |||
2815 | return IgnoreExprNodes(this, IgnoreParensSingleStep, IgnoreCastsSingleStep); | |||
2816 | } | |||
2817 | ||||
2818 | Expr *Expr::IgnoreConversionOperator() { | |||
2819 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(this)) { | |||
2820 | if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl())) | |||
2821 | return MCE->getImplicitObjectArgument(); | |||
2822 | } | |||
2823 | return this; | |||
2824 | } | |||
2825 | ||||
2826 | Expr *Expr::IgnoreParenLValueCasts() { | |||
2827 | return IgnoreExprNodes(this, IgnoreParensSingleStep, | |||
2828 | IgnoreLValueCastsSingleStep); | |||
2829 | } | |||
2830 | ||||
2831 | Expr *Expr::ignoreParenBaseCasts() { | |||
2832 | return IgnoreExprNodes(this, IgnoreParensSingleStep, | |||
2833 | IgnoreBaseCastsSingleStep); | |||
2834 | } | |||
2835 | ||||
2836 | Expr *Expr::IgnoreParenNoopCasts(const ASTContext &Ctx) { | |||
2837 | return IgnoreExprNodes(this, IgnoreParensSingleStep, [&Ctx](Expr *E) { | |||
2838 | return IgnoreNoopCastsSingleStep(Ctx, E); | |||
2839 | }); | |||
2840 | } | |||
2841 | ||||
2842 | bool Expr::isDefaultArgument() const { | |||
2843 | const Expr *E = this; | |||
2844 | if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2845 | E = M->GetTemporaryExpr(); | |||
2846 | ||||
2847 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
2848 | E = ICE->getSubExprAsWritten(); | |||
2849 | ||||
2850 | return isa<CXXDefaultArgExpr>(E); | |||
2851 | } | |||
2852 | ||||
2853 | /// Skip over any no-op casts and any temporary-binding | |||
2854 | /// expressions. | |||
2855 | static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) { | |||
2856 | if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2857 | E = M->GetTemporaryExpr(); | |||
2858 | ||||
2859 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2860 | if (ICE->getCastKind() == CK_NoOp) | |||
2861 | E = ICE->getSubExpr(); | |||
2862 | else | |||
2863 | break; | |||
2864 | } | |||
2865 | ||||
2866 | while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E)) | |||
2867 | E = BE->getSubExpr(); | |||
2868 | ||||
2869 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2870 | if (ICE->getCastKind() == CK_NoOp) | |||
2871 | E = ICE->getSubExpr(); | |||
2872 | else | |||
2873 | break; | |||
2874 | } | |||
2875 | ||||
2876 | return E->IgnoreParens(); | |||
2877 | } | |||
2878 | ||||
2879 | /// isTemporaryObject - Determines if this expression produces a | |||
2880 | /// temporary of the given class type. | |||
2881 | bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const { | |||
2882 | if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy))) | |||
2883 | return false; | |||
2884 | ||||
2885 | const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this); | |||
2886 | ||||
2887 | // Temporaries are by definition pr-values of class type. | |||
2888 | if (!E->Classify(C).isPRValue()) { | |||
2889 | // In this context, property reference is a message call and is pr-value. | |||
2890 | if (!isa<ObjCPropertyRefExpr>(E)) | |||
2891 | return false; | |||
2892 | } | |||
2893 | ||||
2894 | // Black-list a few cases which yield pr-values of class type that don't | |||
2895 | // refer to temporaries of that type: | |||
2896 | ||||
2897 | // - implicit derived-to-base conversions | |||
2898 | if (isa<ImplicitCastExpr>(E)) { | |||
2899 | switch (cast<ImplicitCastExpr>(E)->getCastKind()) { | |||
2900 | case CK_DerivedToBase: | |||
2901 | case CK_UncheckedDerivedToBase: | |||
2902 | return false; | |||
2903 | default: | |||
2904 | break; | |||
2905 | } | |||
2906 | } | |||
2907 | ||||
2908 | // - member expressions (all) | |||
2909 | if (isa<MemberExpr>(E)) | |||
2910 | return false; | |||
2911 | ||||
2912 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) | |||
2913 | if (BO->isPtrMemOp()) | |||
2914 | return false; | |||
2915 | ||||
2916 | // - opaque values (all) | |||
2917 | if (isa<OpaqueValueExpr>(E)) | |||
2918 | return false; | |||
2919 | ||||
2920 | return true; | |||
2921 | } | |||
2922 | ||||
2923 | bool Expr::isImplicitCXXThis() const { | |||
2924 | const Expr *E = this; | |||
2925 | ||||
2926 | // Strip away parentheses and casts we don't care about. | |||
2927 | while (true) { | |||
2928 | if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) { | |||
2929 | E = Paren->getSubExpr(); | |||
2930 | continue; | |||
2931 | } | |||
2932 | ||||
2933 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2934 | if (ICE->getCastKind() == CK_NoOp || | |||
2935 | ICE->getCastKind() == CK_LValueToRValue || | |||
2936 | ICE->getCastKind() == CK_DerivedToBase || | |||
2937 | ICE->getCastKind() == CK_UncheckedDerivedToBase) { | |||
2938 | E = ICE->getSubExpr(); | |||
2939 | continue; | |||
2940 | } | |||
2941 | } | |||
2942 | ||||
2943 | if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) { | |||
2944 | if (UnOp->getOpcode() == UO_Extension) { | |||
2945 | E = UnOp->getSubExpr(); | |||
2946 | continue; | |||
2947 | } | |||
2948 | } | |||
2949 | ||||
2950 | if (const MaterializeTemporaryExpr *M | |||
2951 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2952 | E = M->GetTemporaryExpr(); | |||
2953 | continue; | |||
2954 | } | |||
2955 | ||||
2956 | break; | |||
2957 | } | |||
2958 | ||||
2959 | if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E)) | |||
2960 | return This->isImplicit(); | |||
2961 | ||||
2962 | return false; | |||
2963 | } | |||
2964 | ||||
2965 | /// hasAnyTypeDependentArguments - Determines if any of the expressions | |||
2966 | /// in Exprs is type-dependent. | |||
2967 | bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) { | |||
2968 | for (unsigned I = 0; I < Exprs.size(); ++I) | |||
2969 | if (Exprs[I]->isTypeDependent()) | |||
2970 | return true; | |||
2971 | ||||
2972 | return false; | |||
2973 | } | |||
2974 | ||||
2975 | bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef, | |||
2976 | const Expr **Culprit) const { | |||
2977 | assert(!isValueDependent() &&((!isValueDependent() && "Expression evaluator can't be called on a dependent expression." ) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2978, __PRETTY_FUNCTION__)) | |||
2978 | "Expression evaluator can't be called on a dependent expression.")((!isValueDependent() && "Expression evaluator can't be called on a dependent expression." ) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 2978, __PRETTY_FUNCTION__)); | |||
2979 | ||||
2980 | // This function is attempting whether an expression is an initializer | |||
2981 | // which can be evaluated at compile-time. It very closely parallels | |||
2982 | // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it | |||
2983 | // will lead to unexpected results. Like ConstExprEmitter, it falls back | |||
2984 | // to isEvaluatable most of the time. | |||
2985 | // | |||
2986 | // If we ever capture reference-binding directly in the AST, we can | |||
2987 | // kill the second parameter. | |||
2988 | ||||
2989 | if (IsForRef) { | |||
2990 | EvalResult Result; | |||
2991 | if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects) | |||
2992 | return true; | |||
2993 | if (Culprit) | |||
2994 | *Culprit = this; | |||
2995 | return false; | |||
2996 | } | |||
2997 | ||||
2998 | switch (getStmtClass()) { | |||
2999 | default: break; | |||
3000 | case StringLiteralClass: | |||
3001 | case ObjCEncodeExprClass: | |||
3002 | return true; | |||
3003 | case CXXTemporaryObjectExprClass: | |||
3004 | case CXXConstructExprClass: { | |||
3005 | const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); | |||
3006 | ||||
3007 | if (CE->getConstructor()->isTrivial() && | |||
3008 | CE->getConstructor()->getParent()->hasTrivialDestructor()) { | |||
3009 | // Trivial default constructor | |||
3010 | if (!CE->getNumArgs()) return true; | |||
3011 | ||||
3012 | // Trivial copy constructor | |||
3013 | assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument")((CE->getNumArgs() == 1 && "trivial ctor with > 1 argument" ) ? static_cast<void> (0) : __assert_fail ("CE->getNumArgs() == 1 && \"trivial ctor with > 1 argument\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3013, __PRETTY_FUNCTION__)); | |||
3014 | return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit); | |||
3015 | } | |||
3016 | ||||
3017 | break; | |||
3018 | } | |||
3019 | case ConstantExprClass: { | |||
3020 | // FIXME: We should be able to return "true" here, but it can lead to extra | |||
3021 | // error messages. E.g. in Sema/array-init.c. | |||
3022 | const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr(); | |||
3023 | return Exp->isConstantInitializer(Ctx, false, Culprit); | |||
3024 | } | |||
3025 | case CompoundLiteralExprClass: { | |||
3026 | // This handles gcc's extension that allows global initializers like | |||
3027 | // "struct x {int x;} x = (struct x) {};". | |||
3028 | // FIXME: This accepts other cases it shouldn't! | |||
3029 | const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer(); | |||
3030 | return Exp->isConstantInitializer(Ctx, false, Culprit); | |||
3031 | } | |||
3032 | case DesignatedInitUpdateExprClass: { | |||
3033 | const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this); | |||
3034 | return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) && | |||
3035 | DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit); | |||
3036 | } | |||
3037 | case InitListExprClass: { | |||
3038 | const InitListExpr *ILE = cast<InitListExpr>(this); | |||
3039 | assert(ILE->isSemanticForm() && "InitListExpr must be in semantic form")((ILE->isSemanticForm() && "InitListExpr must be in semantic form" ) ? static_cast<void> (0) : __assert_fail ("ILE->isSemanticForm() && \"InitListExpr must be in semantic form\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3039, __PRETTY_FUNCTION__)); | |||
3040 | if (ILE->getType()->isArrayType()) { | |||
3041 | unsigned numInits = ILE->getNumInits(); | |||
3042 | for (unsigned i = 0; i < numInits; i++) { | |||
3043 | if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit)) | |||
3044 | return false; | |||
3045 | } | |||
3046 | return true; | |||
3047 | } | |||
3048 | ||||
3049 | if (ILE->getType()->isRecordType()) { | |||
3050 | unsigned ElementNo = 0; | |||
3051 | RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl(); | |||
3052 | for (const auto *Field : RD->fields()) { | |||
3053 | // If this is a union, skip all the fields that aren't being initialized. | |||
3054 | if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field) | |||
3055 | continue; | |||
3056 | ||||
3057 | // Don't emit anonymous bitfields, they just affect layout. | |||
3058 | if (Field->isUnnamedBitfield()) | |||
3059 | continue; | |||
3060 | ||||
3061 | if (ElementNo < ILE->getNumInits()) { | |||
3062 | const Expr *Elt = ILE->getInit(ElementNo++); | |||
3063 | if (Field->isBitField()) { | |||
3064 | // Bitfields have to evaluate to an integer. | |||
3065 | EvalResult Result; | |||
3066 | if (!Elt->EvaluateAsInt(Result, Ctx)) { | |||
3067 | if (Culprit) | |||
3068 | *Culprit = Elt; | |||
3069 | return false; | |||
3070 | } | |||
3071 | } else { | |||
3072 | bool RefType = Field->getType()->isReferenceType(); | |||
3073 | if (!Elt->isConstantInitializer(Ctx, RefType, Culprit)) | |||
3074 | return false; | |||
3075 | } | |||
3076 | } | |||
3077 | } | |||
3078 | return true; | |||
3079 | } | |||
3080 | ||||
3081 | break; | |||
3082 | } | |||
3083 | case ImplicitValueInitExprClass: | |||
3084 | case NoInitExprClass: | |||
3085 | return true; | |||
3086 | case ParenExprClass: | |||
3087 | return cast<ParenExpr>(this)->getSubExpr() | |||
3088 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
3089 | case GenericSelectionExprClass: | |||
3090 | return cast<GenericSelectionExpr>(this)->getResultExpr() | |||
3091 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
3092 | case ChooseExprClass: | |||
3093 | if (cast<ChooseExpr>(this)->isConditionDependent()) { | |||
3094 | if (Culprit) | |||
3095 | *Culprit = this; | |||
3096 | return false; | |||
3097 | } | |||
3098 | return cast<ChooseExpr>(this)->getChosenSubExpr() | |||
3099 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
3100 | case UnaryOperatorClass: { | |||
3101 | const UnaryOperator* Exp = cast<UnaryOperator>(this); | |||
3102 | if (Exp->getOpcode() == UO_Extension) | |||
3103 | return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit); | |||
3104 | break; | |||
3105 | } | |||
3106 | case CXXFunctionalCastExprClass: | |||
3107 | case CXXStaticCastExprClass: | |||
3108 | case ImplicitCastExprClass: | |||
3109 | case CStyleCastExprClass: | |||
3110 | case ObjCBridgedCastExprClass: | |||
3111 | case CXXDynamicCastExprClass: | |||
3112 | case CXXReinterpretCastExprClass: | |||
3113 | case CXXConstCastExprClass: { | |||
3114 | const CastExpr *CE = cast<CastExpr>(this); | |||
3115 | ||||
3116 | // Handle misc casts we want to ignore. | |||
3117 | if (CE->getCastKind() == CK_NoOp || | |||
3118 | CE->getCastKind() == CK_LValueToRValue || | |||
3119 | CE->getCastKind() == CK_ToUnion || | |||
3120 | CE->getCastKind() == CK_ConstructorConversion || | |||
3121 | CE->getCastKind() == CK_NonAtomicToAtomic || | |||
3122 | CE->getCastKind() == CK_AtomicToNonAtomic || | |||
3123 | CE->getCastKind() == CK_IntToOCLSampler) | |||
3124 | return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit); | |||
3125 | ||||
3126 | break; | |||
3127 | } | |||
3128 | case MaterializeTemporaryExprClass: | |||
3129 | return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr() | |||
3130 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3131 | ||||
3132 | case SubstNonTypeTemplateParmExprClass: | |||
3133 | return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement() | |||
3134 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3135 | case CXXDefaultArgExprClass: | |||
3136 | return cast<CXXDefaultArgExpr>(this)->getExpr() | |||
3137 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3138 | case CXXDefaultInitExprClass: | |||
3139 | return cast<CXXDefaultInitExpr>(this)->getExpr() | |||
3140 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3141 | } | |||
3142 | // Allow certain forms of UB in constant initializers: signed integer | |||
3143 | // overflow and floating-point division by zero. We'll give a warning on | |||
3144 | // these, but they're common enough that we have to accept them. | |||
3145 | if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior)) | |||
3146 | return true; | |||
3147 | if (Culprit) | |||
3148 | *Culprit = this; | |||
3149 | return false; | |||
3150 | } | |||
3151 | ||||
3152 | bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const { | |||
3153 | const FunctionDecl* FD = getDirectCallee(); | |||
3154 | if (!FD || (FD->getBuiltinID() != Builtin::BI__assume && | |||
3155 | FD->getBuiltinID() != Builtin::BI__builtin_assume)) | |||
3156 | return false; | |||
3157 | ||||
3158 | const Expr* Arg = getArg(0); | |||
3159 | bool ArgVal; | |||
3160 | return !Arg->isValueDependent() && | |||
3161 | Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal; | |||
3162 | } | |||
3163 | ||||
3164 | namespace { | |||
3165 | /// Look for any side effects within a Stmt. | |||
3166 | class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> { | |||
3167 | typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited; | |||
3168 | const bool IncludePossibleEffects; | |||
3169 | bool HasSideEffects; | |||
3170 | ||||
3171 | public: | |||
3172 | explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible) | |||
3173 | : Inherited(Context), | |||
3174 | IncludePossibleEffects(IncludePossible), HasSideEffects(false) { } | |||
3175 | ||||
3176 | bool hasSideEffects() const { return HasSideEffects; } | |||
3177 | ||||
3178 | void VisitExpr(const Expr *E) { | |||
3179 | if (!HasSideEffects && | |||
3180 | E->HasSideEffects(Context, IncludePossibleEffects)) | |||
3181 | HasSideEffects = true; | |||
3182 | } | |||
3183 | }; | |||
3184 | } | |||
3185 | ||||
3186 | bool Expr::HasSideEffects(const ASTContext &Ctx, | |||
3187 | bool IncludePossibleEffects) const { | |||
3188 | // In circumstances where we care about definite side effects instead of | |||
3189 | // potential side effects, we want to ignore expressions that are part of a | |||
3190 | // macro expansion as a potential side effect. | |||
3191 | if (!IncludePossibleEffects && getExprLoc().isMacroID()) | |||
3192 | return false; | |||
3193 | ||||
3194 | if (isInstantiationDependent()) | |||
3195 | return IncludePossibleEffects; | |||
3196 | ||||
3197 | switch (getStmtClass()) { | |||
3198 | case NoStmtClass: | |||
3199 | #define ABSTRACT_STMT(Type) | |||
3200 | #define STMT(Type, Base) case Type##Class: | |||
3201 | #define EXPR(Type, Base) | |||
3202 | #include "clang/AST/StmtNodes.inc" | |||
3203 | llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3203); | |||
3204 | ||||
3205 | case DependentScopeDeclRefExprClass: | |||
3206 | case CXXUnresolvedConstructExprClass: | |||
3207 | case CXXDependentScopeMemberExprClass: | |||
3208 | case UnresolvedLookupExprClass: | |||
3209 | case UnresolvedMemberExprClass: | |||
3210 | case PackExpansionExprClass: | |||
3211 | case SubstNonTypeTemplateParmPackExprClass: | |||
3212 | case FunctionParmPackExprClass: | |||
3213 | case TypoExprClass: | |||
3214 | case CXXFoldExprClass: | |||
3215 | llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3215); | |||
3216 | ||||
3217 | case DeclRefExprClass: | |||
3218 | case ObjCIvarRefExprClass: | |||
3219 | case PredefinedExprClass: | |||
3220 | case IntegerLiteralClass: | |||
3221 | case FixedPointLiteralClass: | |||
3222 | case FloatingLiteralClass: | |||
3223 | case ImaginaryLiteralClass: | |||
3224 | case StringLiteralClass: | |||
3225 | case CharacterLiteralClass: | |||
3226 | case OffsetOfExprClass: | |||
3227 | case ImplicitValueInitExprClass: | |||
3228 | case UnaryExprOrTypeTraitExprClass: | |||
3229 | case AddrLabelExprClass: | |||
3230 | case GNUNullExprClass: | |||
3231 | case ArrayInitIndexExprClass: | |||
3232 | case NoInitExprClass: | |||
3233 | case CXXBoolLiteralExprClass: | |||
3234 | case CXXNullPtrLiteralExprClass: | |||
3235 | case CXXThisExprClass: | |||
3236 | case CXXScalarValueInitExprClass: | |||
3237 | case TypeTraitExprClass: | |||
3238 | case ArrayTypeTraitExprClass: | |||
3239 | case ExpressionTraitExprClass: | |||
3240 | case CXXNoexceptExprClass: | |||
3241 | case SizeOfPackExprClass: | |||
3242 | case ObjCStringLiteralClass: | |||
3243 | case ObjCEncodeExprClass: | |||
3244 | case ObjCBoolLiteralExprClass: | |||
3245 | case ObjCAvailabilityCheckExprClass: | |||
3246 | case CXXUuidofExprClass: | |||
3247 | case OpaqueValueExprClass: | |||
3248 | case SourceLocExprClass: | |||
3249 | // These never have a side-effect. | |||
3250 | return false; | |||
3251 | ||||
3252 | case ConstantExprClass: | |||
3253 | // FIXME: Move this into the "return false;" block above. | |||
3254 | return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects( | |||
3255 | Ctx, IncludePossibleEffects); | |||
3256 | ||||
3257 | case CallExprClass: | |||
3258 | case CXXOperatorCallExprClass: | |||
3259 | case CXXMemberCallExprClass: | |||
3260 | case CUDAKernelCallExprClass: | |||
3261 | case UserDefinedLiteralClass: { | |||
3262 | // We don't know a call definitely has side effects, except for calls | |||
3263 | // to pure/const functions that definitely don't. | |||
3264 | // If the call itself is considered side-effect free, check the operands. | |||
3265 | const Decl *FD = cast<CallExpr>(this)->getCalleeDecl(); | |||
3266 | bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>()); | |||
3267 | if (IsPure || !IncludePossibleEffects) | |||
3268 | break; | |||
3269 | return true; | |||
3270 | } | |||
3271 | ||||
3272 | case BlockExprClass: | |||
3273 | case CXXBindTemporaryExprClass: | |||
3274 | if (!IncludePossibleEffects) | |||
3275 | break; | |||
3276 | return true; | |||
3277 | ||||
3278 | case MSPropertyRefExprClass: | |||
3279 | case MSPropertySubscriptExprClass: | |||
3280 | case CompoundAssignOperatorClass: | |||
3281 | case VAArgExprClass: | |||
3282 | case AtomicExprClass: | |||
3283 | case CXXThrowExprClass: | |||
3284 | case CXXNewExprClass: | |||
3285 | case CXXDeleteExprClass: | |||
3286 | case CoawaitExprClass: | |||
3287 | case DependentCoawaitExprClass: | |||
3288 | case CoyieldExprClass: | |||
3289 | // These always have a side-effect. | |||
3290 | return true; | |||
3291 | ||||
3292 | case StmtExprClass: { | |||
3293 | // StmtExprs have a side-effect if any substatement does. | |||
3294 | SideEffectFinder Finder(Ctx, IncludePossibleEffects); | |||
3295 | Finder.Visit(cast<StmtExpr>(this)->getSubStmt()); | |||
3296 | return Finder.hasSideEffects(); | |||
3297 | } | |||
3298 | ||||
3299 | case ExprWithCleanupsClass: | |||
3300 | if (IncludePossibleEffects) | |||
3301 | if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects()) | |||
3302 | return true; | |||
3303 | break; | |||
3304 | ||||
3305 | case ParenExprClass: | |||
3306 | case ArraySubscriptExprClass: | |||
3307 | case OMPArraySectionExprClass: | |||
3308 | case MemberExprClass: | |||
3309 | case ConditionalOperatorClass: | |||
3310 | case BinaryConditionalOperatorClass: | |||
3311 | case CompoundLiteralExprClass: | |||
3312 | case ExtVectorElementExprClass: | |||
3313 | case DesignatedInitExprClass: | |||
3314 | case DesignatedInitUpdateExprClass: | |||
3315 | case ArrayInitLoopExprClass: | |||
3316 | case ParenListExprClass: | |||
3317 | case CXXPseudoDestructorExprClass: | |||
3318 | case CXXStdInitializerListExprClass: | |||
3319 | case SubstNonTypeTemplateParmExprClass: | |||
3320 | case MaterializeTemporaryExprClass: | |||
3321 | case ShuffleVectorExprClass: | |||
3322 | case ConvertVectorExprClass: | |||
3323 | case AsTypeExprClass: | |||
3324 | // These have a side-effect if any subexpression does. | |||
3325 | break; | |||
3326 | ||||
3327 | case UnaryOperatorClass: | |||
3328 | if (cast<UnaryOperator>(this)->isIncrementDecrementOp()) | |||
3329 | return true; | |||
3330 | break; | |||
3331 | ||||
3332 | case BinaryOperatorClass: | |||
3333 | if (cast<BinaryOperator>(this)->isAssignmentOp()) | |||
3334 | return true; | |||
3335 | break; | |||
3336 | ||||
3337 | case InitListExprClass: | |||
3338 | // FIXME: The children for an InitListExpr doesn't include the array filler. | |||
3339 | if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller()) | |||
3340 | if (E->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3341 | return true; | |||
3342 | break; | |||
3343 | ||||
3344 | case GenericSelectionExprClass: | |||
3345 | return cast<GenericSelectionExpr>(this)->getResultExpr()-> | |||
3346 | HasSideEffects(Ctx, IncludePossibleEffects); | |||
3347 | ||||
3348 | case ChooseExprClass: | |||
3349 | return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects( | |||
3350 | Ctx, IncludePossibleEffects); | |||
3351 | ||||
3352 | case CXXDefaultArgExprClass: | |||
3353 | return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects( | |||
3354 | Ctx, IncludePossibleEffects); | |||
3355 | ||||
3356 | case CXXDefaultInitExprClass: { | |||
3357 | const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField(); | |||
3358 | if (const Expr *E = FD->getInClassInitializer()) | |||
3359 | return E->HasSideEffects(Ctx, IncludePossibleEffects); | |||
3360 | // If we've not yet parsed the initializer, assume it has side-effects. | |||
3361 | return true; | |||
3362 | } | |||
3363 | ||||
3364 | case CXXDynamicCastExprClass: { | |||
3365 | // A dynamic_cast expression has side-effects if it can throw. | |||
3366 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this); | |||
3367 | if (DCE->getTypeAsWritten()->isReferenceType() && | |||
3368 | DCE->getCastKind() == CK_Dynamic) | |||
3369 | return true; | |||
3370 | } | |||
3371 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
3372 | case ImplicitCastExprClass: | |||
3373 | case CStyleCastExprClass: | |||
3374 | case CXXStaticCastExprClass: | |||
3375 | case CXXReinterpretCastExprClass: | |||
3376 | case CXXConstCastExprClass: | |||
3377 | case CXXFunctionalCastExprClass: { | |||
3378 | // While volatile reads are side-effecting in both C and C++, we treat them | |||
3379 | // as having possible (not definite) side-effects. This allows idiomatic | |||
3380 | // code to behave without warning, such as sizeof(*v) for a volatile- | |||
3381 | // qualified pointer. | |||
3382 | if (!IncludePossibleEffects) | |||
3383 | break; | |||
3384 | ||||
3385 | const CastExpr *CE = cast<CastExpr>(this); | |||
3386 | if (CE->getCastKind() == CK_LValueToRValue && | |||
3387 | CE->getSubExpr()->getType().isVolatileQualified()) | |||
3388 | return true; | |||
3389 | break; | |||
3390 | } | |||
3391 | ||||
3392 | case CXXTypeidExprClass: | |||
3393 | // typeid might throw if its subexpression is potentially-evaluated, so has | |||
3394 | // side-effects in that case whether or not its subexpression does. | |||
3395 | return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated(); | |||
3396 | ||||
3397 | case CXXConstructExprClass: | |||
3398 | case CXXTemporaryObjectExprClass: { | |||
3399 | const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); | |||
3400 | if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects) | |||
3401 | return true; | |||
3402 | // A trivial constructor does not add any side-effects of its own. Just look | |||
3403 | // at its arguments. | |||
3404 | break; | |||
3405 | } | |||
3406 | ||||
3407 | case CXXInheritedCtorInitExprClass: { | |||
3408 | const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this); | |||
3409 | if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects) | |||
3410 | return true; | |||
3411 | break; | |||
3412 | } | |||
3413 | ||||
3414 | case LambdaExprClass: { | |||
3415 | const LambdaExpr *LE = cast<LambdaExpr>(this); | |||
3416 | for (Expr *E : LE->capture_inits()) | |||
3417 | if (E->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3418 | return true; | |||
3419 | return false; | |||
3420 | } | |||
3421 | ||||
3422 | case PseudoObjectExprClass: { | |||
3423 | // Only look for side-effects in the semantic form, and look past | |||
3424 | // OpaqueValueExpr bindings in that form. | |||
3425 | const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); | |||
3426 | for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(), | |||
3427 | E = PO->semantics_end(); | |||
3428 | I != E; ++I) { | |||
3429 | const Expr *Subexpr = *I; | |||
3430 | if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr)) | |||
3431 | Subexpr = OVE->getSourceExpr(); | |||
3432 | if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3433 | return true; | |||
3434 | } | |||
3435 | return false; | |||
3436 | } | |||
3437 | ||||
3438 | case ObjCBoxedExprClass: | |||
3439 | case ObjCArrayLiteralClass: | |||
3440 | case ObjCDictionaryLiteralClass: | |||
3441 | case ObjCSelectorExprClass: | |||
3442 | case ObjCProtocolExprClass: | |||
3443 | case ObjCIsaExprClass: | |||
3444 | case ObjCIndirectCopyRestoreExprClass: | |||
3445 | case ObjCSubscriptRefExprClass: | |||
3446 | case ObjCBridgedCastExprClass: | |||
3447 | case ObjCMessageExprClass: | |||
3448 | case ObjCPropertyRefExprClass: | |||
3449 | // FIXME: Classify these cases better. | |||
3450 | if (IncludePossibleEffects) | |||
3451 | return true; | |||
3452 | break; | |||
3453 | } | |||
3454 | ||||
3455 | // Recurse to children. | |||
3456 | for (const Stmt *SubStmt : children()) | |||
3457 | if (SubStmt && | |||
3458 | cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3459 | return true; | |||
3460 | ||||
3461 | return false; | |||
3462 | } | |||
3463 | ||||
3464 | namespace { | |||
3465 | /// Look for a call to a non-trivial function within an expression. | |||
3466 | class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder> | |||
3467 | { | |||
3468 | typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited; | |||
3469 | ||||
3470 | bool NonTrivial; | |||
3471 | ||||
3472 | public: | |||
3473 | explicit NonTrivialCallFinder(const ASTContext &Context) | |||
3474 | : Inherited(Context), NonTrivial(false) { } | |||
3475 | ||||
3476 | bool hasNonTrivialCall() const { return NonTrivial; } | |||
3477 | ||||
3478 | void VisitCallExpr(const CallExpr *E) { | |||
3479 | if (const CXXMethodDecl *Method | |||
3480 | = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) { | |||
3481 | if (Method->isTrivial()) { | |||
3482 | // Recurse to children of the call. | |||
3483 | Inherited::VisitStmt(E); | |||
3484 | return; | |||
3485 | } | |||
3486 | } | |||
3487 | ||||
3488 | NonTrivial = true; | |||
3489 | } | |||
3490 | ||||
3491 | void VisitCXXConstructExpr(const CXXConstructExpr *E) { | |||
3492 | if (E->getConstructor()->isTrivial()) { | |||
3493 | // Recurse to children of the call. | |||
3494 | Inherited::VisitStmt(E); | |||
3495 | return; | |||
3496 | } | |||
3497 | ||||
3498 | NonTrivial = true; | |||
3499 | } | |||
3500 | ||||
3501 | void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) { | |||
3502 | if (E->getTemporary()->getDestructor()->isTrivial()) { | |||
3503 | Inherited::VisitStmt(E); | |||
3504 | return; | |||
3505 | } | |||
3506 | ||||
3507 | NonTrivial = true; | |||
3508 | } | |||
3509 | }; | |||
3510 | } | |||
3511 | ||||
3512 | bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const { | |||
3513 | NonTrivialCallFinder Finder(Ctx); | |||
3514 | Finder.Visit(this); | |||
3515 | return Finder.hasNonTrivialCall(); | |||
3516 | } | |||
3517 | ||||
3518 | /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null | |||
3519 | /// pointer constant or not, as well as the specific kind of constant detected. | |||
3520 | /// Null pointer constants can be integer constant expressions with the | |||
3521 | /// value zero, casts of zero to void*, nullptr (C++0X), or __null | |||
3522 | /// (a GNU extension). | |||
3523 | Expr::NullPointerConstantKind | |||
3524 | Expr::isNullPointerConstant(ASTContext &Ctx, | |||
3525 | NullPointerConstantValueDependence NPC) const { | |||
3526 | if (isValueDependent() && | |||
3527 | (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) { | |||
3528 | switch (NPC) { | |||
3529 | case NPC_NeverValueDependent: | |||
3530 | llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3530); | |||
3531 | case NPC_ValueDependentIsNull: | |||
3532 | if (isTypeDependent() || getType()->isIntegralType(Ctx)) | |||
3533 | return NPCK_ZeroExpression; | |||
3534 | else | |||
3535 | return NPCK_NotNull; | |||
3536 | ||||
3537 | case NPC_ValueDependentIsNotNull: | |||
3538 | return NPCK_NotNull; | |||
3539 | } | |||
3540 | } | |||
3541 | ||||
3542 | // Strip off a cast to void*, if it exists. Except in C++. | |||
3543 | if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { | |||
3544 | if (!Ctx.getLangOpts().CPlusPlus) { | |||
3545 | // Check that it is a cast to void*. | |||
3546 | if (const PointerType *PT = CE->getType()->getAs<PointerType>()) { | |||
3547 | QualType Pointee = PT->getPointeeType(); | |||
3548 | Qualifiers Qs = Pointee.getQualifiers(); | |||
3549 | // Only (void*)0 or equivalent are treated as nullptr. If pointee type | |||
3550 | // has non-default address space it is not treated as nullptr. | |||
3551 | // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr | |||
3552 | // since it cannot be assigned to a pointer to constant address space. | |||
3553 | if ((Ctx.getLangOpts().OpenCLVersion >= 200 && | |||
3554 | Pointee.getAddressSpace() == LangAS::opencl_generic) || | |||
3555 | (Ctx.getLangOpts().OpenCL && | |||
3556 | Ctx.getLangOpts().OpenCLVersion < 200 && | |||
3557 | Pointee.getAddressSpace() == LangAS::opencl_private)) | |||
3558 | Qs.removeAddressSpace(); | |||
3559 | ||||
3560 | if (Pointee->isVoidType() && Qs.empty() && // to void* | |||
3561 | CE->getSubExpr()->getType()->isIntegerType()) // from int | |||
3562 | return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3563 | } | |||
3564 | } | |||
3565 | } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { | |||
3566 | // Ignore the ImplicitCastExpr type entirely. | |||
3567 | return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3568 | } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { | |||
3569 | // Accept ((void*)0) as a null pointer constant, as many other | |||
3570 | // implementations do. | |||
3571 | return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3572 | } else if (const GenericSelectionExpr *GE = | |||
3573 | dyn_cast<GenericSelectionExpr>(this)) { | |||
3574 | if (GE->isResultDependent()) | |||
3575 | return NPCK_NotNull; | |||
3576 | return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC); | |||
3577 | } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) { | |||
3578 | if (CE->isConditionDependent()) | |||
3579 | return NPCK_NotNull; | |||
3580 | return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3581 | } else if (const CXXDefaultArgExpr *DefaultArg | |||
3582 | = dyn_cast<CXXDefaultArgExpr>(this)) { | |||
3583 | // See through default argument expressions. | |||
3584 | return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC); | |||
3585 | } else if (const CXXDefaultInitExpr *DefaultInit | |||
3586 | = dyn_cast<CXXDefaultInitExpr>(this)) { | |||
3587 | // See through default initializer expressions. | |||
3588 | return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC); | |||
3589 | } else if (isa<GNUNullExpr>(this)) { | |||
3590 | // The GNU __null extension is always a null pointer constant. | |||
3591 | return NPCK_GNUNull; | |||
3592 | } else if (const MaterializeTemporaryExpr *M | |||
3593 | = dyn_cast<MaterializeTemporaryExpr>(this)) { | |||
3594 | return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC); | |||
3595 | } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) { | |||
3596 | if (const Expr *Source = OVE->getSourceExpr()) | |||
3597 | return Source->isNullPointerConstant(Ctx, NPC); | |||
3598 | } | |||
3599 | ||||
3600 | // C++11 nullptr_t is always a null pointer constant. | |||
3601 | if (getType()->isNullPtrType()) | |||
3602 | return NPCK_CXX11_nullptr; | |||
3603 | ||||
3604 | if (const RecordType *UT = getType()->getAsUnionType()) | |||
3605 | if (!Ctx.getLangOpts().CPlusPlus11 && | |||
3606 | UT && UT->getDecl()->hasAttr<TransparentUnionAttr>()) | |||
3607 | if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){ | |||
3608 | const Expr *InitExpr = CLE->getInitializer(); | |||
3609 | if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr)) | |||
3610 | return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC); | |||
3611 | } | |||
3612 | // This expression must be an integer type. | |||
3613 | if (!getType()->isIntegerType() || | |||
3614 | (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType())) | |||
3615 | return NPCK_NotNull; | |||
3616 | ||||
3617 | if (Ctx.getLangOpts().CPlusPlus11) { | |||
3618 | // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with | |||
3619 | // value zero or a prvalue of type std::nullptr_t. | |||
3620 | // Microsoft mode permits C++98 rules reflecting MSVC behavior. | |||
3621 | const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this); | |||
3622 | if (Lit && !Lit->getValue()) | |||
3623 | return NPCK_ZeroLiteral; | |||
3624 | else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx)) | |||
3625 | return NPCK_NotNull; | |||
3626 | } else { | |||
3627 | // If we have an integer constant expression, we need to *evaluate* it and | |||
3628 | // test for the value 0. | |||
3629 | if (!isIntegerConstantExpr(Ctx)) | |||
3630 | return NPCK_NotNull; | |||
3631 | } | |||
3632 | ||||
3633 | if (EvaluateKnownConstInt(Ctx) != 0) | |||
3634 | return NPCK_NotNull; | |||
3635 | ||||
3636 | if (isa<IntegerLiteral>(this)) | |||
3637 | return NPCK_ZeroLiteral; | |||
3638 | return NPCK_ZeroExpression; | |||
3639 | } | |||
3640 | ||||
3641 | /// If this expression is an l-value for an Objective C | |||
3642 | /// property, find the underlying property reference expression. | |||
3643 | const ObjCPropertyRefExpr *Expr::getObjCProperty() const { | |||
3644 | const Expr *E = this; | |||
3645 | while (true) { | |||
3646 | assert((E->getValueKind() == VK_LValue &&(((E->getValueKind() == VK_LValue && E->getObjectKind () == OK_ObjCProperty) && "expression is not a property reference" ) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3648, __PRETTY_FUNCTION__)) | |||
3647 | E->getObjectKind() == OK_ObjCProperty) &&(((E->getValueKind() == VK_LValue && E->getObjectKind () == OK_ObjCProperty) && "expression is not a property reference" ) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3648, __PRETTY_FUNCTION__)) | |||
3648 | "expression is not a property reference")(((E->getValueKind() == VK_LValue && E->getObjectKind () == OK_ObjCProperty) && "expression is not a property reference" ) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3648, __PRETTY_FUNCTION__)); | |||
3649 | E = E->IgnoreParenCasts(); | |||
3650 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
3651 | if (BO->getOpcode() == BO_Comma) { | |||
3652 | E = BO->getRHS(); | |||
3653 | continue; | |||
3654 | } | |||
3655 | } | |||
3656 | ||||
3657 | break; | |||
3658 | } | |||
3659 | ||||
3660 | return cast<ObjCPropertyRefExpr>(E); | |||
3661 | } | |||
3662 | ||||
3663 | bool Expr::isObjCSelfExpr() const { | |||
3664 | const Expr *E = IgnoreParenImpCasts(); | |||
3665 | ||||
3666 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
3667 | if (!DRE) | |||
3668 | return false; | |||
3669 | ||||
3670 | const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl()); | |||
3671 | if (!Param) | |||
3672 | return false; | |||
3673 | ||||
3674 | const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext()); | |||
3675 | if (!M) | |||
3676 | return false; | |||
3677 | ||||
3678 | return M->getSelfDecl() == Param; | |||
3679 | } | |||
3680 | ||||
3681 | FieldDecl *Expr::getSourceBitField() { | |||
3682 | Expr *E = this->IgnoreParens(); | |||
3683 | ||||
3684 | while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
3685 | if (ICE->getCastKind() == CK_LValueToRValue || | |||
3686 | (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp)) | |||
3687 | E = ICE->getSubExpr()->IgnoreParens(); | |||
3688 | else | |||
3689 | break; | |||
3690 | } | |||
3691 | ||||
3692 | if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) | |||
3693 | if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl())) | |||
3694 | if (Field->isBitField()) | |||
3695 | return Field; | |||
3696 | ||||
3697 | if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) { | |||
3698 | FieldDecl *Ivar = IvarRef->getDecl(); | |||
3699 | if (Ivar->isBitField()) | |||
3700 | return Ivar; | |||
3701 | } | |||
3702 | ||||
3703 | if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) { | |||
3704 | if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl())) | |||
3705 | if (Field->isBitField()) | |||
3706 | return Field; | |||
3707 | ||||
3708 | if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl())) | |||
3709 | if (Expr *E = BD->getBinding()) | |||
3710 | return E->getSourceBitField(); | |||
3711 | } | |||
3712 | ||||
3713 | if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) { | |||
3714 | if (BinOp->isAssignmentOp() && BinOp->getLHS()) | |||
3715 | return BinOp->getLHS()->getSourceBitField(); | |||
3716 | ||||
3717 | if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS()) | |||
3718 | return BinOp->getRHS()->getSourceBitField(); | |||
3719 | } | |||
3720 | ||||
3721 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E)) | |||
3722 | if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp()) | |||
3723 | return UnOp->getSubExpr()->getSourceBitField(); | |||
3724 | ||||
3725 | return nullptr; | |||
3726 | } | |||
3727 | ||||
3728 | bool Expr::refersToVectorElement() const { | |||
3729 | // FIXME: Why do we not just look at the ObjectKind here? | |||
3730 | const Expr *E = this->IgnoreParens(); | |||
3731 | ||||
3732 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
3733 | if (ICE->getValueKind() != VK_RValue && | |||
3734 | ICE->getCastKind() == CK_NoOp) | |||
3735 | E = ICE->getSubExpr()->IgnoreParens(); | |||
3736 | else | |||
3737 | break; | |||
3738 | } | |||
3739 | ||||
3740 | if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) | |||
3741 | return ASE->getBase()->getType()->isVectorType(); | |||
3742 | ||||
3743 | if (isa<ExtVectorElementExpr>(E)) | |||
3744 | return true; | |||
3745 | ||||
3746 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
3747 | if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl())) | |||
3748 | if (auto *E = BD->getBinding()) | |||
3749 | return E->refersToVectorElement(); | |||
3750 | ||||
3751 | return false; | |||
3752 | } | |||
3753 | ||||
3754 | bool Expr::refersToGlobalRegisterVar() const { | |||
3755 | const Expr *E = this->IgnoreParenImpCasts(); | |||
3756 | ||||
3757 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) | |||
3758 | if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl())) | |||
3759 | if (VD->getStorageClass() == SC_Register && | |||
3760 | VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl()) | |||
3761 | return true; | |||
3762 | ||||
3763 | return false; | |||
3764 | } | |||
3765 | ||||
3766 | /// isArrow - Return true if the base expression is a pointer to vector, | |||
3767 | /// return false if the base expression is a vector. | |||
3768 | bool ExtVectorElementExpr::isArrow() const { | |||
3769 | return getBase()->getType()->isPointerType(); | |||
3770 | } | |||
3771 | ||||
3772 | unsigned ExtVectorElementExpr::getNumElements() const { | |||
3773 | if (const VectorType *VT = getType()->getAs<VectorType>()) | |||
3774 | return VT->getNumElements(); | |||
3775 | return 1; | |||
3776 | } | |||
3777 | ||||
3778 | /// containsDuplicateElements - Return true if any element access is repeated. | |||
3779 | bool ExtVectorElementExpr::containsDuplicateElements() const { | |||
3780 | // FIXME: Refactor this code to an accessor on the AST node which returns the | |||
3781 | // "type" of component access, and share with code below and in Sema. | |||
3782 | StringRef Comp = Accessor->getName(); | |||
3783 | ||||
3784 | // Halving swizzles do not contain duplicate elements. | |||
3785 | if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd") | |||
3786 | return false; | |||
3787 | ||||
3788 | // Advance past s-char prefix on hex swizzles. | |||
3789 | if (Comp[0] == 's' || Comp[0] == 'S') | |||
3790 | Comp = Comp.substr(1); | |||
3791 | ||||
3792 | for (unsigned i = 0, e = Comp.size(); i != e; ++i) | |||
3793 | if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos) | |||
3794 | return true; | |||
3795 | ||||
3796 | return false; | |||
3797 | } | |||
3798 | ||||
3799 | /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. | |||
3800 | void ExtVectorElementExpr::getEncodedElementAccess( | |||
3801 | SmallVectorImpl<uint32_t> &Elts) const { | |||
3802 | StringRef Comp = Accessor->getName(); | |||
3803 | bool isNumericAccessor = false; | |||
3804 | if (Comp[0] == 's' || Comp[0] == 'S') { | |||
3805 | Comp = Comp.substr(1); | |||
3806 | isNumericAccessor = true; | |||
3807 | } | |||
3808 | ||||
3809 | bool isHi = Comp == "hi"; | |||
3810 | bool isLo = Comp == "lo"; | |||
3811 | bool isEven = Comp == "even"; | |||
3812 | bool isOdd = Comp == "odd"; | |||
3813 | ||||
3814 | for (unsigned i = 0, e = getNumElements(); i != e; ++i) { | |||
3815 | uint64_t Index; | |||
3816 | ||||
3817 | if (isHi) | |||
3818 | Index = e + i; | |||
3819 | else if (isLo) | |||
3820 | Index = i; | |||
3821 | else if (isEven) | |||
3822 | Index = 2 * i; | |||
3823 | else if (isOdd) | |||
3824 | Index = 2 * i + 1; | |||
3825 | else | |||
3826 | Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor); | |||
3827 | ||||
3828 | Elts.push_back(Index); | |||
3829 | } | |||
3830 | } | |||
3831 | ||||
3832 | ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args, | |||
3833 | QualType Type, SourceLocation BLoc, | |||
3834 | SourceLocation RP) | |||
3835 | : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary, | |||
3836 | Type->isDependentType(), Type->isDependentType(), | |||
3837 | Type->isInstantiationDependentType(), | |||
3838 | Type->containsUnexpandedParameterPack()), | |||
3839 | BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size()) | |||
3840 | { | |||
3841 | SubExprs = new (C) Stmt*[args.size()]; | |||
3842 | for (unsigned i = 0; i != args.size(); i++) { | |||
3843 | if (args[i]->isTypeDependent()) | |||
3844 | ExprBits.TypeDependent = true; | |||
3845 | if (args[i]->isValueDependent()) | |||
3846 | ExprBits.ValueDependent = true; | |||
3847 | if (args[i]->isInstantiationDependent()) | |||
3848 | ExprBits.InstantiationDependent = true; | |||
3849 | if (args[i]->containsUnexpandedParameterPack()) | |||
3850 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
3851 | ||||
3852 | SubExprs[i] = args[i]; | |||
3853 | } | |||
3854 | } | |||
3855 | ||||
3856 | void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) { | |||
3857 | if (SubExprs) C.Deallocate(SubExprs); | |||
3858 | ||||
3859 | this->NumExprs = Exprs.size(); | |||
3860 | SubExprs = new (C) Stmt*[NumExprs]; | |||
3861 | memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size()); | |||
3862 | } | |||
3863 | ||||
3864 | GenericSelectionExpr::GenericSelectionExpr( | |||
3865 | const ASTContext &, SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3866 | ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs, | |||
3867 | SourceLocation DefaultLoc, SourceLocation RParenLoc, | |||
3868 | bool ContainsUnexpandedParameterPack, unsigned ResultIndex) | |||
3869 | : Expr(GenericSelectionExprClass, AssocExprs[ResultIndex]->getType(), | |||
3870 | AssocExprs[ResultIndex]->getValueKind(), | |||
3871 | AssocExprs[ResultIndex]->getObjectKind(), | |||
3872 | AssocExprs[ResultIndex]->isTypeDependent(), | |||
3873 | AssocExprs[ResultIndex]->isValueDependent(), | |||
3874 | AssocExprs[ResultIndex]->isInstantiationDependent(), | |||
3875 | ContainsUnexpandedParameterPack), | |||
3876 | NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex), | |||
3877 | DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { | |||
3878 | assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3880, __PRETTY_FUNCTION__)) | |||
3879 | "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3880, __PRETTY_FUNCTION__)) | |||
3880 | " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3880, __PRETTY_FUNCTION__)); | |||
3881 | assert(ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!")((ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!" ) ? static_cast<void> (0) : __assert_fail ("ResultIndex < NumAssocs && \"ResultIndex is out-of-bounds!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3881, __PRETTY_FUNCTION__)); | |||
3882 | ||||
3883 | GenericSelectionExprBits.GenericLoc = GenericLoc; | |||
3884 | getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr; | |||
3885 | std::copy(AssocExprs.begin(), AssocExprs.end(), | |||
3886 | getTrailingObjects<Stmt *>() + AssocExprStartIndex); | |||
3887 | std::copy(AssocTypes.begin(), AssocTypes.end(), | |||
3888 | getTrailingObjects<TypeSourceInfo *>()); | |||
3889 | } | |||
3890 | ||||
3891 | GenericSelectionExpr::GenericSelectionExpr( | |||
3892 | const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3893 | ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs, | |||
3894 | SourceLocation DefaultLoc, SourceLocation RParenLoc, | |||
3895 | bool ContainsUnexpandedParameterPack) | |||
3896 | : Expr(GenericSelectionExprClass, Context.DependentTy, VK_RValue, | |||
3897 | OK_Ordinary, | |||
3898 | /*isTypeDependent=*/true, | |||
3899 | /*isValueDependent=*/true, | |||
3900 | /*isInstantiationDependent=*/true, ContainsUnexpandedParameterPack), | |||
3901 | NumAssocs(AssocExprs.size()), ResultIndex(ResultDependentIndex), | |||
3902 | DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { | |||
3903 | assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3905, __PRETTY_FUNCTION__)) | |||
3904 | "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3905, __PRETTY_FUNCTION__)) | |||
3905 | " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions" " and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3905, __PRETTY_FUNCTION__)); | |||
3906 | ||||
3907 | GenericSelectionExprBits.GenericLoc = GenericLoc; | |||
3908 | getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr; | |||
3909 | std::copy(AssocExprs.begin(), AssocExprs.end(), | |||
3910 | getTrailingObjects<Stmt *>() + AssocExprStartIndex); | |||
3911 | std::copy(AssocTypes.begin(), AssocTypes.end(), | |||
3912 | getTrailingObjects<TypeSourceInfo *>()); | |||
3913 | } | |||
3914 | ||||
3915 | GenericSelectionExpr::GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs) | |||
3916 | : Expr(GenericSelectionExprClass, Empty), NumAssocs(NumAssocs) {} | |||
3917 | ||||
3918 | GenericSelectionExpr *GenericSelectionExpr::Create( | |||
3919 | const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3920 | ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs, | |||
3921 | SourceLocation DefaultLoc, SourceLocation RParenLoc, | |||
3922 | bool ContainsUnexpandedParameterPack, unsigned ResultIndex) { | |||
3923 | unsigned NumAssocs = AssocExprs.size(); | |||
3924 | void *Mem = Context.Allocate( | |||
3925 | totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs), | |||
3926 | alignof(GenericSelectionExpr)); | |||
3927 | return new (Mem) GenericSelectionExpr( | |||
3928 | Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc, | |||
3929 | RParenLoc, ContainsUnexpandedParameterPack, ResultIndex); | |||
3930 | } | |||
3931 | ||||
3932 | GenericSelectionExpr *GenericSelectionExpr::Create( | |||
3933 | const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3934 | ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs, | |||
3935 | SourceLocation DefaultLoc, SourceLocation RParenLoc, | |||
3936 | bool ContainsUnexpandedParameterPack) { | |||
3937 | unsigned NumAssocs = AssocExprs.size(); | |||
3938 | void *Mem = Context.Allocate( | |||
3939 | totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs), | |||
3940 | alignof(GenericSelectionExpr)); | |||
3941 | return new (Mem) GenericSelectionExpr( | |||
3942 | Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc, | |||
3943 | RParenLoc, ContainsUnexpandedParameterPack); | |||
3944 | } | |||
3945 | ||||
3946 | GenericSelectionExpr * | |||
3947 | GenericSelectionExpr::CreateEmpty(const ASTContext &Context, | |||
3948 | unsigned NumAssocs) { | |||
3949 | void *Mem = Context.Allocate( | |||
3950 | totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs), | |||
3951 | alignof(GenericSelectionExpr)); | |||
3952 | return new (Mem) GenericSelectionExpr(EmptyShell(), NumAssocs); | |||
3953 | } | |||
3954 | ||||
3955 | //===----------------------------------------------------------------------===// | |||
3956 | // DesignatedInitExpr | |||
3957 | //===----------------------------------------------------------------------===// | |||
3958 | ||||
3959 | IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const { | |||
3960 | assert(Kind == FieldDesignator && "Only valid on a field designator")((Kind == FieldDesignator && "Only valid on a field designator" ) ? static_cast<void> (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 3960, __PRETTY_FUNCTION__)); | |||
3961 | if (Field.NameOrField & 0x01) | |||
3962 | return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01); | |||
3963 | else | |||
3964 | return getField()->getIdentifier(); | |||
3965 | } | |||
3966 | ||||
3967 | DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty, | |||
3968 | llvm::ArrayRef<Designator> Designators, | |||
3969 | SourceLocation EqualOrColonLoc, | |||
3970 | bool GNUSyntax, | |||
3971 | ArrayRef<Expr*> IndexExprs, | |||
3972 | Expr *Init) | |||
3973 | : Expr(DesignatedInitExprClass, Ty, | |||
3974 | Init->getValueKind(), Init->getObjectKind(), | |||
3975 | Init->isTypeDependent(), Init->isValueDependent(), | |||
3976 | Init->isInstantiationDependent(), | |||
3977 | Init->containsUnexpandedParameterPack()), | |||
3978 | EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax), | |||
3979 | NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) { | |||
3980 | this->Designators = new (C) Designator[NumDesignators]; | |||
3981 | ||||
3982 | // Record the initializer itself. | |||
3983 | child_iterator Child = child_begin(); | |||
3984 | *Child++ = Init; | |||
3985 | ||||
3986 | // Copy the designators and their subexpressions, computing | |||
3987 | // value-dependence along the way. | |||
3988 | unsigned IndexIdx = 0; | |||
3989 | for (unsigned I = 0; I != NumDesignators; ++I) { | |||
3990 | this->Designators[I] = Designators[I]; | |||
3991 | ||||
3992 | if (this->Designators[I].isArrayDesignator()) { | |||
3993 | // Compute type- and value-dependence. | |||
3994 | Expr *Index = IndexExprs[IndexIdx]; | |||
3995 | if (Index->isTypeDependent() || Index->isValueDependent()) | |||
3996 | ExprBits.TypeDependent = ExprBits.ValueDependent = true; | |||
3997 | if (Index->isInstantiationDependent()) | |||
3998 | ExprBits.InstantiationDependent = true; | |||
3999 | // Propagate unexpanded parameter packs. | |||
4000 | if (Index->containsUnexpandedParameterPack()) | |||
4001 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4002 | ||||
4003 | // Copy the index expressions into permanent storage. | |||
4004 | *Child++ = IndexExprs[IndexIdx++]; | |||
4005 | } else if (this->Designators[I].isArrayRangeDesignator()) { | |||
4006 | // Compute type- and value-dependence. | |||
4007 | Expr *Start = IndexExprs[IndexIdx]; | |||
4008 | Expr *End = IndexExprs[IndexIdx + 1]; | |||
4009 | if (Start->isTypeDependent() || Start->isValueDependent() || | |||
4010 | End->isTypeDependent() || End->isValueDependent()) { | |||
4011 | ExprBits.TypeDependent = ExprBits.ValueDependent = true; | |||
4012 | ExprBits.InstantiationDependent = true; | |||
4013 | } else if (Start->isInstantiationDependent() || | |||
4014 | End->isInstantiationDependent()) { | |||
4015 | ExprBits.InstantiationDependent = true; | |||
4016 | } | |||
4017 | ||||
4018 | // Propagate unexpanded parameter packs. | |||
4019 | if (Start->containsUnexpandedParameterPack() || | |||
4020 | End->containsUnexpandedParameterPack()) | |||
4021 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4022 | ||||
4023 | // Copy the start/end expressions into permanent storage. | |||
4024 | *Child++ = IndexExprs[IndexIdx++]; | |||
4025 | *Child++ = IndexExprs[IndexIdx++]; | |||
4026 | } | |||
4027 | } | |||
4028 | ||||
4029 | assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions")((IndexIdx == IndexExprs.size() && "Wrong number of index expressions" ) ? static_cast<void> (0) : __assert_fail ("IndexIdx == IndexExprs.size() && \"Wrong number of index expressions\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4029, __PRETTY_FUNCTION__)); | |||
4030 | } | |||
4031 | ||||
4032 | DesignatedInitExpr * | |||
4033 | DesignatedInitExpr::Create(const ASTContext &C, | |||
4034 | llvm::ArrayRef<Designator> Designators, | |||
4035 | ArrayRef<Expr*> IndexExprs, | |||
4036 | SourceLocation ColonOrEqualLoc, | |||
4037 | bool UsesColonSyntax, Expr *Init) { | |||
4038 | void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1), | |||
4039 | alignof(DesignatedInitExpr)); | |||
4040 | return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators, | |||
4041 | ColonOrEqualLoc, UsesColonSyntax, | |||
4042 | IndexExprs, Init); | |||
4043 | } | |||
4044 | ||||
4045 | DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C, | |||
4046 | unsigned NumIndexExprs) { | |||
4047 | void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1), | |||
4048 | alignof(DesignatedInitExpr)); | |||
4049 | return new (Mem) DesignatedInitExpr(NumIndexExprs + 1); | |||
4050 | } | |||
4051 | ||||
4052 | void DesignatedInitExpr::setDesignators(const ASTContext &C, | |||
4053 | const Designator *Desigs, | |||
4054 | unsigned NumDesigs) { | |||
4055 | Designators = new (C) Designator[NumDesigs]; | |||
| ||||
4056 | NumDesignators = NumDesigs; | |||
4057 | for (unsigned I = 0; I != NumDesigs; ++I) | |||
4058 | Designators[I] = Desigs[I]; | |||
| ||||
4059 | } | |||
4060 | ||||
4061 | SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const { | |||
4062 | DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this); | |||
4063 | if (size() == 1) | |||
4064 | return DIE->getDesignator(0)->getSourceRange(); | |||
4065 | return SourceRange(DIE->getDesignator(0)->getBeginLoc(), | |||
4066 | DIE->getDesignator(size() - 1)->getEndLoc()); | |||
4067 | } | |||
4068 | ||||
4069 | SourceLocation DesignatedInitExpr::getBeginLoc() const { | |||
4070 | SourceLocation StartLoc; | |||
4071 | auto *DIE = const_cast<DesignatedInitExpr *>(this); | |||
4072 | Designator &First = *DIE->getDesignator(0); | |||
4073 | if (First.isFieldDesignator()) { | |||
4074 | if (GNUSyntax) | |||
4075 | StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc); | |||
4076 | else | |||
4077 | StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc); | |||
4078 | } else | |||
4079 | StartLoc = | |||
4080 | SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc); | |||
4081 | return StartLoc; | |||
4082 | } | |||
4083 | ||||
4084 | SourceLocation DesignatedInitExpr::getEndLoc() const { | |||
4085 | return getInit()->getEndLoc(); | |||
4086 | } | |||
4087 | ||||
4088 | Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const { | |||
4089 | assert(D.Kind == Designator::ArrayDesignator && "Requires array designator")((D.Kind == Designator::ArrayDesignator && "Requires array designator" ) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayDesignator && \"Requires array designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4089, __PRETTY_FUNCTION__)); | |||
4090 | return getSubExpr(D.ArrayOrRange.Index + 1); | |||
4091 | } | |||
4092 | ||||
4093 | Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const { | |||
4094 | assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator" ) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4095, __PRETTY_FUNCTION__)) | |||
4095 | "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator" ) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4095, __PRETTY_FUNCTION__)); | |||
4096 | return getSubExpr(D.ArrayOrRange.Index + 1); | |||
4097 | } | |||
4098 | ||||
4099 | Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const { | |||
4100 | assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator" ) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4101, __PRETTY_FUNCTION__)) | |||
4101 | "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator" ) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4101, __PRETTY_FUNCTION__)); | |||
4102 | return getSubExpr(D.ArrayOrRange.Index + 2); | |||
4103 | } | |||
4104 | ||||
4105 | /// Replaces the designator at index @p Idx with the series | |||
4106 | /// of designators in [First, Last). | |||
4107 | void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx, | |||
4108 | const Designator *First, | |||
4109 | const Designator *Last) { | |||
4110 | unsigned NumNewDesignators = Last - First; | |||
4111 | if (NumNewDesignators == 0) { | |||
4112 | std::copy_backward(Designators + Idx + 1, | |||
4113 | Designators + NumDesignators, | |||
4114 | Designators + Idx); | |||
4115 | --NumNewDesignators; | |||
4116 | return; | |||
4117 | } else if (NumNewDesignators == 1) { | |||
4118 | Designators[Idx] = *First; | |||
4119 | return; | |||
4120 | } | |||
4121 | ||||
4122 | Designator *NewDesignators | |||
4123 | = new (C) Designator[NumDesignators - 1 + NumNewDesignators]; | |||
4124 | std::copy(Designators, Designators + Idx, NewDesignators); | |||
4125 | std::copy(First, Last, NewDesignators + Idx); | |||
4126 | std::copy(Designators + Idx + 1, Designators + NumDesignators, | |||
4127 | NewDesignators + Idx + NumNewDesignators); | |||
4128 | Designators = NewDesignators; | |||
4129 | NumDesignators = NumDesignators - 1 + NumNewDesignators; | |||
4130 | } | |||
4131 | ||||
4132 | DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C, | |||
4133 | SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc) | |||
4134 | : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue, | |||
4135 | OK_Ordinary, false, false, false, false) { | |||
4136 | BaseAndUpdaterExprs[0] = baseExpr; | |||
4137 | ||||
4138 | InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc); | |||
4139 | ILE->setType(baseExpr->getType()); | |||
4140 | BaseAndUpdaterExprs[1] = ILE; | |||
4141 | } | |||
4142 | ||||
4143 | SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const { | |||
4144 | return getBase()->getBeginLoc(); | |||
4145 | } | |||
4146 | ||||
4147 | SourceLocation DesignatedInitUpdateExpr::getEndLoc() const { | |||
4148 | return getBase()->getEndLoc(); | |||
4149 | } | |||
4150 | ||||
4151 | ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs, | |||
4152 | SourceLocation RParenLoc) | |||
4153 | : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false, | |||
4154 | false, false), | |||
4155 | LParenLoc(LParenLoc), RParenLoc(RParenLoc) { | |||
4156 | ParenListExprBits.NumExprs = Exprs.size(); | |||
4157 | ||||
4158 | for (unsigned I = 0, N = Exprs.size(); I != N; ++I) { | |||
4159 | if (Exprs[I]->isTypeDependent()) | |||
4160 | ExprBits.TypeDependent = true; | |||
4161 | if (Exprs[I]->isValueDependent()) | |||
4162 | ExprBits.ValueDependent = true; | |||
4163 | if (Exprs[I]->isInstantiationDependent()) | |||
4164 | ExprBits.InstantiationDependent = true; | |||
4165 | if (Exprs[I]->containsUnexpandedParameterPack()) | |||
4166 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4167 | ||||
4168 | getTrailingObjects<Stmt *>()[I] = Exprs[I]; | |||
4169 | } | |||
4170 | } | |||
4171 | ||||
4172 | ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs) | |||
4173 | : Expr(ParenListExprClass, Empty) { | |||
4174 | ParenListExprBits.NumExprs = NumExprs; | |||
4175 | } | |||
4176 | ||||
4177 | ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx, | |||
4178 | SourceLocation LParenLoc, | |||
4179 | ArrayRef<Expr *> Exprs, | |||
4180 | SourceLocation RParenLoc) { | |||
4181 | void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()), | |||
4182 | alignof(ParenListExpr)); | |||
4183 | return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc); | |||
4184 | } | |||
4185 | ||||
4186 | ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx, | |||
4187 | unsigned NumExprs) { | |||
4188 | void *Mem = | |||
4189 | Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr)); | |||
4190 | return new (Mem) ParenListExpr(EmptyShell(), NumExprs); | |||
4191 | } | |||
4192 | ||||
4193 | const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) { | |||
4194 | if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e)) | |||
4195 | e = ewc->getSubExpr(); | |||
4196 | if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e)) | |||
4197 | e = m->GetTemporaryExpr(); | |||
4198 | e = cast<CXXConstructExpr>(e)->getArg(0); | |||
4199 | while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e)) | |||
4200 | e = ice->getSubExpr(); | |||
4201 | return cast<OpaqueValueExpr>(e); | |||
4202 | } | |||
4203 | ||||
4204 | PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context, | |||
4205 | EmptyShell sh, | |||
4206 | unsigned numSemanticExprs) { | |||
4207 | void *buffer = | |||
4208 | Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs), | |||
4209 | alignof(PseudoObjectExpr)); | |||
4210 | return new(buffer) PseudoObjectExpr(sh, numSemanticExprs); | |||
4211 | } | |||
4212 | ||||
4213 | PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs) | |||
4214 | : Expr(PseudoObjectExprClass, shell) { | |||
4215 | PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1; | |||
4216 | } | |||
4217 | ||||
4218 | PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax, | |||
4219 | ArrayRef<Expr*> semantics, | |||
4220 | unsigned resultIndex) { | |||
4221 | assert(syntax && "no syntactic expression!")((syntax && "no syntactic expression!") ? static_cast <void> (0) : __assert_fail ("syntax && \"no syntactic expression!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4221, __PRETTY_FUNCTION__)); | |||
4222 | assert(semantics.size() && "no semantic expressions!")((semantics.size() && "no semantic expressions!") ? static_cast <void> (0) : __assert_fail ("semantics.size() && \"no semantic expressions!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4222, __PRETTY_FUNCTION__)); | |||
4223 | ||||
4224 | QualType type; | |||
4225 | ExprValueKind VK; | |||
4226 | if (resultIndex == NoResult) { | |||
4227 | type = C.VoidTy; | |||
4228 | VK = VK_RValue; | |||
4229 | } else { | |||
4230 | assert(resultIndex < semantics.size())((resultIndex < semantics.size()) ? static_cast<void> (0) : __assert_fail ("resultIndex < semantics.size()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4230, __PRETTY_FUNCTION__)); | |||
4231 | type = semantics[resultIndex]->getType(); | |||
4232 | VK = semantics[resultIndex]->getValueKind(); | |||
4233 | assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary)((semantics[resultIndex]->getObjectKind() == OK_Ordinary) ? static_cast<void> (0) : __assert_fail ("semantics[resultIndex]->getObjectKind() == OK_Ordinary" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4233, __PRETTY_FUNCTION__)); | |||
4234 | } | |||
4235 | ||||
4236 | void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1), | |||
4237 | alignof(PseudoObjectExpr)); | |||
4238 | return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics, | |||
4239 | resultIndex); | |||
4240 | } | |||
4241 | ||||
4242 | PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK, | |||
4243 | Expr *syntax, ArrayRef<Expr*> semantics, | |||
4244 | unsigned resultIndex) | |||
4245 | : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary, | |||
4246 | /*filled in at end of ctor*/ false, false, false, false) { | |||
4247 | PseudoObjectExprBits.NumSubExprs = semantics.size() + 1; | |||
4248 | PseudoObjectExprBits.ResultIndex = resultIndex + 1; | |||
4249 | ||||
4250 | for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) { | |||
4251 | Expr *E = (i == 0 ? syntax : semantics[i-1]); | |||
4252 | getSubExprsBuffer()[i] = E; | |||
4253 | ||||
4254 | if (E->isTypeDependent()) | |||
4255 | ExprBits.TypeDependent = true; | |||
4256 | if (E->isValueDependent()) | |||
4257 | ExprBits.ValueDependent = true; | |||
4258 | if (E->isInstantiationDependent()) | |||
4259 | ExprBits.InstantiationDependent = true; | |||
4260 | if (E->containsUnexpandedParameterPack()) | |||
4261 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4262 | ||||
4263 | if (isa<OpaqueValueExpr>(E)) | |||
4264 | assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object " "operations must have sources") ? static_cast<void> (0 ) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4266, __PRETTY_FUNCTION__)) | |||
4265 | "opaque-value semantic expressions for pseudo-object "((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object " "operations must have sources") ? static_cast<void> (0 ) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4266, __PRETTY_FUNCTION__)) | |||
4266 | "operations must have sources")((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object " "operations must have sources") ? static_cast<void> (0 ) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4266, __PRETTY_FUNCTION__)); | |||
4267 | } | |||
4268 | } | |||
4269 | ||||
4270 | //===----------------------------------------------------------------------===// | |||
4271 | // Child Iterators for iterating over subexpressions/substatements | |||
4272 | //===----------------------------------------------------------------------===// | |||
4273 | ||||
4274 | // UnaryExprOrTypeTraitExpr | |||
4275 | Stmt::child_range UnaryExprOrTypeTraitExpr::children() { | |||
4276 | const_child_range CCR = | |||
4277 | const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children(); | |||
4278 | return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end())); | |||
4279 | } | |||
4280 | ||||
4281 | Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const { | |||
4282 | // If this is of a type and the type is a VLA type (and not a typedef), the | |||
4283 | // size expression of the VLA needs to be treated as an executable expression. | |||
4284 | // Why isn't this weirdness documented better in StmtIterator? | |||
4285 | if (isArgumentType()) { | |||
4286 | if (const VariableArrayType *T = | |||
4287 | dyn_cast<VariableArrayType>(getArgumentType().getTypePtr())) | |||
4288 | return const_child_range(const_child_iterator(T), const_child_iterator()); | |||
4289 | return const_child_range(const_child_iterator(), const_child_iterator()); | |||
4290 | } | |||
4291 | return const_child_range(&Argument.Ex, &Argument.Ex + 1); | |||
4292 | } | |||
4293 | ||||
4294 | AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args, | |||
4295 | QualType t, AtomicOp op, SourceLocation RP) | |||
4296 | : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary, | |||
4297 | false, false, false, false), | |||
4298 | NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op) | |||
4299 | { | |||
4300 | assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions")((args.size() == getNumSubExprs(op) && "wrong number of subexpressions" ) ? static_cast<void> (0) : __assert_fail ("args.size() == getNumSubExprs(op) && \"wrong number of subexpressions\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4300, __PRETTY_FUNCTION__)); | |||
4301 | for (unsigned i = 0; i != args.size(); i++) { | |||
4302 | if (args[i]->isTypeDependent()) | |||
4303 | ExprBits.TypeDependent = true; | |||
4304 | if (args[i]->isValueDependent()) | |||
4305 | ExprBits.ValueDependent = true; | |||
4306 | if (args[i]->isInstantiationDependent()) | |||
4307 | ExprBits.InstantiationDependent = true; | |||
4308 | if (args[i]->containsUnexpandedParameterPack()) | |||
4309 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4310 | ||||
4311 | SubExprs[i] = args[i]; | |||
4312 | } | |||
4313 | } | |||
4314 | ||||
4315 | unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) { | |||
4316 | switch (Op) { | |||
4317 | case AO__c11_atomic_init: | |||
4318 | case AO__opencl_atomic_init: | |||
4319 | case AO__c11_atomic_load: | |||
4320 | case AO__atomic_load_n: | |||
4321 | return 2; | |||
4322 | ||||
4323 | case AO__opencl_atomic_load: | |||
4324 | case AO__c11_atomic_store: | |||
4325 | case AO__c11_atomic_exchange: | |||
4326 | case AO__atomic_load: | |||
4327 | case AO__atomic_store: | |||
4328 | case AO__atomic_store_n: | |||
4329 | case AO__atomic_exchange_n: | |||
4330 | case AO__c11_atomic_fetch_add: | |||
4331 | case AO__c11_atomic_fetch_sub: | |||
4332 | case AO__c11_atomic_fetch_and: | |||
4333 | case AO__c11_atomic_fetch_or: | |||
4334 | case AO__c11_atomic_fetch_xor: | |||
4335 | case AO__atomic_fetch_add: | |||
4336 | case AO__atomic_fetch_sub: | |||
4337 | case AO__atomic_fetch_and: | |||
4338 | case AO__atomic_fetch_or: | |||
4339 | case AO__atomic_fetch_xor: | |||
4340 | case AO__atomic_fetch_nand: | |||
4341 | case AO__atomic_add_fetch: | |||
4342 | case AO__atomic_sub_fetch: | |||
4343 | case AO__atomic_and_fetch: | |||
4344 | case AO__atomic_or_fetch: | |||
4345 | case AO__atomic_xor_fetch: | |||
4346 | case AO__atomic_nand_fetch: | |||
4347 | case AO__atomic_fetch_min: | |||
4348 | case AO__atomic_fetch_max: | |||
4349 | return 3; | |||
4350 | ||||
4351 | case AO__opencl_atomic_store: | |||
4352 | case AO__opencl_atomic_exchange: | |||
4353 | case AO__opencl_atomic_fetch_add: | |||
4354 | case AO__opencl_atomic_fetch_sub: | |||
4355 | case AO__opencl_atomic_fetch_and: | |||
4356 | case AO__opencl_atomic_fetch_or: | |||
4357 | case AO__opencl_atomic_fetch_xor: | |||
4358 | case AO__opencl_atomic_fetch_min: | |||
4359 | case AO__opencl_atomic_fetch_max: | |||
4360 | case AO__atomic_exchange: | |||
4361 | return 4; | |||
4362 | ||||
4363 | case AO__c11_atomic_compare_exchange_strong: | |||
4364 | case AO__c11_atomic_compare_exchange_weak: | |||
4365 | return 5; | |||
4366 | ||||
4367 | case AO__opencl_atomic_compare_exchange_strong: | |||
4368 | case AO__opencl_atomic_compare_exchange_weak: | |||
4369 | case AO__atomic_compare_exchange: | |||
4370 | case AO__atomic_compare_exchange_n: | |||
4371 | return 6; | |||
4372 | } | |||
4373 | llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4373); | |||
4374 | } | |||
4375 | ||||
4376 | QualType AtomicExpr::getValueType() const { | |||
4377 | auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType(); | |||
4378 | if (auto AT = T->getAs<AtomicType>()) | |||
4379 | return AT->getValueType(); | |||
4380 | return T; | |||
4381 | } | |||
4382 | ||||
4383 | QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) { | |||
4384 | unsigned ArraySectionCount = 0; | |||
4385 | while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) { | |||
4386 | Base = OASE->getBase(); | |||
4387 | ++ArraySectionCount; | |||
4388 | } | |||
4389 | while (auto *ASE = | |||
4390 | dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) { | |||
4391 | Base = ASE->getBase(); | |||
4392 | ++ArraySectionCount; | |||
4393 | } | |||
4394 | Base = Base->IgnoreParenImpCasts(); | |||
4395 | auto OriginalTy = Base->getType(); | |||
4396 | if (auto *DRE = dyn_cast<DeclRefExpr>(Base)) | |||
4397 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) | |||
4398 | OriginalTy = PVD->getOriginalType().getNonReferenceType(); | |||
4399 | ||||
4400 | for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) { | |||
4401 | if (OriginalTy->isAnyPointerType()) | |||
4402 | OriginalTy = OriginalTy->getPointeeType(); | |||
4403 | else { | |||
4404 | assert (OriginalTy->isArrayType())((OriginalTy->isArrayType()) ? static_cast<void> (0) : __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Expr.cpp" , 4404, __PRETTY_FUNCTION__)); | |||
4405 | OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType(); | |||
4406 | } | |||
4407 | } | |||
4408 | return OriginalTy; | |||
4409 | } |