File: | tools/clang/lib/AST/Expr.cpp |
Warning: | line 3995, column 14 Array access (via field 'Exprs') results in a null pointer dereference |
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1 | //===--- Expr.cpp - Expression AST Node Implementation --------------------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | // This file implements the Expr class and subclasses. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "clang/AST/ASTContext.h" | |||
15 | #include "clang/AST/Attr.h" | |||
16 | #include "clang/AST/DeclCXX.h" | |||
17 | #include "clang/AST/DeclObjC.h" | |||
18 | #include "clang/AST/DeclTemplate.h" | |||
19 | #include "clang/AST/EvaluatedExprVisitor.h" | |||
20 | #include "clang/AST/Expr.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 "clang/Sema/SemaDiagnostic.h" | |||
32 | #include "llvm/Support/ErrorHandling.h" | |||
33 | #include "llvm/Support/raw_ostream.h" | |||
34 | #include <algorithm> | |||
35 | #include <cstring> | |||
36 | using namespace clang; | |||
37 | ||||
38 | const Expr *Expr::getBestDynamicClassTypeExpr() const { | |||
39 | const Expr *E = this; | |||
40 | while (true) { | |||
41 | E = E->ignoreParenBaseCasts(); | |||
42 | ||||
43 | // Follow the RHS of a comma operator. | |||
44 | if (auto *BO = dyn_cast<BinaryOperator>(E)) { | |||
45 | if (BO->getOpcode() == BO_Comma) { | |||
46 | E = BO->getRHS(); | |||
47 | continue; | |||
48 | } | |||
49 | } | |||
50 | ||||
51 | // Step into initializer for materialized temporaries. | |||
52 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
53 | E = MTE->GetTemporaryExpr(); | |||
54 | continue; | |||
55 | } | |||
56 | ||||
57 | break; | |||
58 | } | |||
59 | ||||
60 | return E; | |||
61 | } | |||
62 | ||||
63 | const CXXRecordDecl *Expr::getBestDynamicClassType() const { | |||
64 | const Expr *E = getBestDynamicClassTypeExpr(); | |||
65 | QualType DerivedType = E->getType(); | |||
66 | if (const PointerType *PTy = DerivedType->getAs<PointerType>()) | |||
67 | DerivedType = PTy->getPointeeType(); | |||
68 | ||||
69 | if (DerivedType->isDependentType()) | |||
70 | return nullptr; | |||
71 | ||||
72 | const RecordType *Ty = DerivedType->castAs<RecordType>(); | |||
73 | Decl *D = Ty->getDecl(); | |||
74 | return cast<CXXRecordDecl>(D); | |||
75 | } | |||
76 | ||||
77 | const Expr *Expr::skipRValueSubobjectAdjustments( | |||
78 | SmallVectorImpl<const Expr *> &CommaLHSs, | |||
79 | SmallVectorImpl<SubobjectAdjustment> &Adjustments) const { | |||
80 | const Expr *E = this; | |||
81 | while (true) { | |||
82 | E = E->IgnoreParens(); | |||
83 | ||||
84 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { | |||
85 | if ((CE->getCastKind() == CK_DerivedToBase || | |||
86 | CE->getCastKind() == CK_UncheckedDerivedToBase) && | |||
87 | E->getType()->isRecordType()) { | |||
88 | E = CE->getSubExpr(); | |||
89 | CXXRecordDecl *Derived | |||
90 | = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl()); | |||
91 | Adjustments.push_back(SubobjectAdjustment(CE, Derived)); | |||
92 | continue; | |||
93 | } | |||
94 | ||||
95 | if (CE->getCastKind() == CK_NoOp) { | |||
96 | E = CE->getSubExpr(); | |||
97 | continue; | |||
98 | } | |||
99 | } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | |||
100 | if (!ME->isArrow()) { | |||
101 | assert(ME->getBase()->getType()->isRecordType())((ME->getBase()->getType()->isRecordType()) ? static_cast <void> (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 101, __PRETTY_FUNCTION__)); | |||
102 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) { | |||
103 | if (!Field->isBitField() && !Field->getType()->isReferenceType()) { | |||
104 | E = ME->getBase(); | |||
105 | Adjustments.push_back(SubobjectAdjustment(Field)); | |||
106 | continue; | |||
107 | } | |||
108 | } | |||
109 | } | |||
110 | } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
111 | if (BO->getOpcode() == BO_PtrMemD) { | |||
112 | assert(BO->getRHS()->isRValue())((BO->getRHS()->isRValue()) ? static_cast<void> ( 0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 112, __PRETTY_FUNCTION__)); | |||
113 | E = BO->getLHS(); | |||
114 | const MemberPointerType *MPT = | |||
115 | BO->getRHS()->getType()->getAs<MemberPointerType>(); | |||
116 | Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS())); | |||
117 | continue; | |||
118 | } else if (BO->getOpcode() == BO_Comma) { | |||
119 | CommaLHSs.push_back(BO->getLHS()); | |||
120 | E = BO->getRHS(); | |||
121 | continue; | |||
122 | } | |||
123 | } | |||
124 | ||||
125 | // Nothing changed. | |||
126 | break; | |||
127 | } | |||
128 | return E; | |||
129 | } | |||
130 | ||||
131 | /// isKnownToHaveBooleanValue - Return true if this is an integer expression | |||
132 | /// that is known to return 0 or 1. This happens for _Bool/bool expressions | |||
133 | /// but also int expressions which are produced by things like comparisons in | |||
134 | /// C. | |||
135 | bool Expr::isKnownToHaveBooleanValue() const { | |||
136 | const Expr *E = IgnoreParens(); | |||
137 | ||||
138 | // If this value has _Bool type, it is obvious 0/1. | |||
139 | if (E->getType()->isBooleanType()) return true; | |||
140 | // If this is a non-scalar-integer type, we don't care enough to try. | |||
141 | if (!E->getType()->isIntegralOrEnumerationType()) return false; | |||
142 | ||||
143 | if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | |||
144 | switch (UO->getOpcode()) { | |||
145 | case UO_Plus: | |||
146 | return UO->getSubExpr()->isKnownToHaveBooleanValue(); | |||
147 | case UO_LNot: | |||
148 | return true; | |||
149 | default: | |||
150 | return false; | |||
151 | } | |||
152 | } | |||
153 | ||||
154 | // Only look through implicit casts. If the user writes | |||
155 | // '(int) (a && b)' treat it as an arbitrary int. | |||
156 | if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E)) | |||
157 | return CE->getSubExpr()->isKnownToHaveBooleanValue(); | |||
158 | ||||
159 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
160 | switch (BO->getOpcode()) { | |||
161 | default: return false; | |||
162 | case BO_LT: // Relational operators. | |||
163 | case BO_GT: | |||
164 | case BO_LE: | |||
165 | case BO_GE: | |||
166 | case BO_EQ: // Equality operators. | |||
167 | case BO_NE: | |||
168 | case BO_LAnd: // AND operator. | |||
169 | case BO_LOr: // Logical OR operator. | |||
170 | return true; | |||
171 | ||||
172 | case BO_And: // Bitwise AND operator. | |||
173 | case BO_Xor: // Bitwise XOR operator. | |||
174 | case BO_Or: // Bitwise OR operator. | |||
175 | // Handle things like (x==2)|(y==12). | |||
176 | return BO->getLHS()->isKnownToHaveBooleanValue() && | |||
177 | BO->getRHS()->isKnownToHaveBooleanValue(); | |||
178 | ||||
179 | case BO_Comma: | |||
180 | case BO_Assign: | |||
181 | return BO->getRHS()->isKnownToHaveBooleanValue(); | |||
182 | } | |||
183 | } | |||
184 | ||||
185 | if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) | |||
186 | return CO->getTrueExpr()->isKnownToHaveBooleanValue() && | |||
187 | CO->getFalseExpr()->isKnownToHaveBooleanValue(); | |||
188 | ||||
189 | return false; | |||
190 | } | |||
191 | ||||
192 | // Amusing macro metaprogramming hack: check whether a class provides | |||
193 | // a more specific implementation of getExprLoc(). | |||
194 | // | |||
195 | // See also Stmt.cpp:{getBeginLoc(),getEndLoc()}. | |||
196 | namespace { | |||
197 | /// This implementation is used when a class provides a custom | |||
198 | /// implementation of getExprLoc. | |||
199 | template <class E, class T> | |||
200 | SourceLocation getExprLocImpl(const Expr *expr, | |||
201 | SourceLocation (T::*v)() const) { | |||
202 | return static_cast<const E*>(expr)->getExprLoc(); | |||
203 | } | |||
204 | ||||
205 | /// This implementation is used when a class doesn't provide | |||
206 | /// a custom implementation of getExprLoc. Overload resolution | |||
207 | /// should pick it over the implementation above because it's | |||
208 | /// more specialized according to function template partial ordering. | |||
209 | template <class E> | |||
210 | SourceLocation getExprLocImpl(const Expr *expr, | |||
211 | SourceLocation (Expr::*v)() const) { | |||
212 | return static_cast<const E *>(expr)->getBeginLoc(); | |||
213 | } | |||
214 | } | |||
215 | ||||
216 | SourceLocation Expr::getExprLoc() const { | |||
217 | switch (getStmtClass()) { | |||
218 | case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 218); | |||
219 | #define ABSTRACT_STMT(type) | |||
220 | #define STMT(type, base) \ | |||
221 | case Stmt::type##Class: break; | |||
222 | #define EXPR(type, base) \ | |||
223 | case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc); | |||
224 | #include "clang/AST/StmtNodes.inc" | |||
225 | } | |||
226 | llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 226); | |||
227 | } | |||
228 | ||||
229 | //===----------------------------------------------------------------------===// | |||
230 | // Primary Expressions. | |||
231 | //===----------------------------------------------------------------------===// | |||
232 | ||||
233 | /// Compute the type-, value-, and instantiation-dependence of a | |||
234 | /// declaration reference | |||
235 | /// based on the declaration being referenced. | |||
236 | static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D, | |||
237 | QualType T, bool &TypeDependent, | |||
238 | bool &ValueDependent, | |||
239 | bool &InstantiationDependent) { | |||
240 | TypeDependent = false; | |||
241 | ValueDependent = false; | |||
242 | InstantiationDependent = false; | |||
243 | ||||
244 | // (TD) C++ [temp.dep.expr]p3: | |||
245 | // An id-expression is type-dependent if it contains: | |||
246 | // | |||
247 | // and | |||
248 | // | |||
249 | // (VD) C++ [temp.dep.constexpr]p2: | |||
250 | // An identifier is value-dependent if it is: | |||
251 | ||||
252 | // (TD) - an identifier that was declared with dependent type | |||
253 | // (VD) - a name declared with a dependent type, | |||
254 | if (T->isDependentType()) { | |||
255 | TypeDependent = true; | |||
256 | ValueDependent = true; | |||
257 | InstantiationDependent = true; | |||
258 | return; | |||
259 | } else if (T->isInstantiationDependentType()) { | |||
260 | InstantiationDependent = true; | |||
261 | } | |||
262 | ||||
263 | // (TD) - a conversion-function-id that specifies a dependent type | |||
264 | if (D->getDeclName().getNameKind() | |||
265 | == DeclarationName::CXXConversionFunctionName) { | |||
266 | QualType T = D->getDeclName().getCXXNameType(); | |||
267 | if (T->isDependentType()) { | |||
268 | TypeDependent = true; | |||
269 | ValueDependent = true; | |||
270 | InstantiationDependent = true; | |||
271 | return; | |||
272 | } | |||
273 | ||||
274 | if (T->isInstantiationDependentType()) | |||
275 | InstantiationDependent = true; | |||
276 | } | |||
277 | ||||
278 | // (VD) - the name of a non-type template parameter, | |||
279 | if (isa<NonTypeTemplateParmDecl>(D)) { | |||
280 | ValueDependent = true; | |||
281 | InstantiationDependent = true; | |||
282 | return; | |||
283 | } | |||
284 | ||||
285 | // (VD) - a constant with integral or enumeration type and is | |||
286 | // initialized with an expression that is value-dependent. | |||
287 | // (VD) - a constant with literal type and is initialized with an | |||
288 | // expression that is value-dependent [C++11]. | |||
289 | // (VD) - FIXME: Missing from the standard: | |||
290 | // - an entity with reference type and is initialized with an | |||
291 | // expression that is value-dependent [C++11] | |||
292 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) { | |||
293 | if ((Ctx.getLangOpts().CPlusPlus11 ? | |||
294 | Var->getType()->isLiteralType(Ctx) : | |||
295 | Var->getType()->isIntegralOrEnumerationType()) && | |||
296 | (Var->getType().isConstQualified() || | |||
297 | Var->getType()->isReferenceType())) { | |||
298 | if (const Expr *Init = Var->getAnyInitializer()) | |||
299 | if (Init->isValueDependent()) { | |||
300 | ValueDependent = true; | |||
301 | InstantiationDependent = true; | |||
302 | } | |||
303 | } | |||
304 | ||||
305 | // (VD) - FIXME: Missing from the standard: | |||
306 | // - a member function or a static data member of the current | |||
307 | // instantiation | |||
308 | if (Var->isStaticDataMember() && | |||
309 | Var->getDeclContext()->isDependentContext()) { | |||
310 | ValueDependent = true; | |||
311 | InstantiationDependent = true; | |||
312 | TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo(); | |||
313 | if (TInfo->getType()->isIncompleteArrayType()) | |||
314 | TypeDependent = true; | |||
315 | } | |||
316 | ||||
317 | return; | |||
318 | } | |||
319 | ||||
320 | // (VD) - FIXME: Missing from the standard: | |||
321 | // - a member function or a static data member of the current | |||
322 | // instantiation | |||
323 | if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) { | |||
324 | ValueDependent = true; | |||
325 | InstantiationDependent = true; | |||
326 | } | |||
327 | } | |||
328 | ||||
329 | void DeclRefExpr::computeDependence(const ASTContext &Ctx) { | |||
330 | bool TypeDependent = false; | |||
331 | bool ValueDependent = false; | |||
332 | bool InstantiationDependent = false; | |||
333 | computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent, | |||
334 | ValueDependent, InstantiationDependent); | |||
335 | ||||
336 | ExprBits.TypeDependent |= TypeDependent; | |||
337 | ExprBits.ValueDependent |= ValueDependent; | |||
338 | ExprBits.InstantiationDependent |= InstantiationDependent; | |||
339 | ||||
340 | // Is the declaration a parameter pack? | |||
341 | if (getDecl()->isParameterPack()) | |||
342 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
343 | } | |||
344 | ||||
345 | DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, | |||
346 | NestedNameSpecifierLoc QualifierLoc, | |||
347 | SourceLocation TemplateKWLoc, | |||
348 | ValueDecl *D, bool RefersToEnclosingVariableOrCapture, | |||
349 | const DeclarationNameInfo &NameInfo, | |||
350 | NamedDecl *FoundD, | |||
351 | const TemplateArgumentListInfo *TemplateArgs, | |||
352 | QualType T, ExprValueKind VK) | |||
353 | : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false), | |||
354 | D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) { | |||
355 | DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0; | |||
356 | if (QualifierLoc) { | |||
357 | new (getTrailingObjects<NestedNameSpecifierLoc>()) | |||
358 | NestedNameSpecifierLoc(QualifierLoc); | |||
359 | auto *NNS = QualifierLoc.getNestedNameSpecifier(); | |||
360 | if (NNS->isInstantiationDependent()) | |||
361 | ExprBits.InstantiationDependent = true; | |||
362 | if (NNS->containsUnexpandedParameterPack()) | |||
363 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
364 | } | |||
365 | DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0; | |||
366 | if (FoundD) | |||
367 | *getTrailingObjects<NamedDecl *>() = FoundD; | |||
368 | DeclRefExprBits.HasTemplateKWAndArgsInfo | |||
369 | = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0; | |||
370 | DeclRefExprBits.RefersToEnclosingVariableOrCapture = | |||
371 | RefersToEnclosingVariableOrCapture; | |||
372 | if (TemplateArgs) { | |||
373 | bool Dependent = false; | |||
374 | bool InstantiationDependent = false; | |||
375 | bool ContainsUnexpandedParameterPack = false; | |||
376 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
377 | TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(), | |||
378 | Dependent, InstantiationDependent, ContainsUnexpandedParameterPack); | |||
379 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 379, __PRETTY_FUNCTION__)); | |||
380 | ExprBits.InstantiationDependent |= InstantiationDependent; | |||
381 | ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack; | |||
382 | } else if (TemplateKWLoc.isValid()) { | |||
383 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
384 | TemplateKWLoc); | |||
385 | } | |||
386 | DeclRefExprBits.HadMultipleCandidates = 0; | |||
387 | ||||
388 | computeDependence(Ctx); | |||
389 | } | |||
390 | ||||
391 | DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context, | |||
392 | NestedNameSpecifierLoc QualifierLoc, | |||
393 | SourceLocation TemplateKWLoc, | |||
394 | ValueDecl *D, | |||
395 | bool RefersToEnclosingVariableOrCapture, | |||
396 | SourceLocation NameLoc, | |||
397 | QualType T, | |||
398 | ExprValueKind VK, | |||
399 | NamedDecl *FoundD, | |||
400 | const TemplateArgumentListInfo *TemplateArgs) { | |||
401 | return Create(Context, QualifierLoc, TemplateKWLoc, D, | |||
402 | RefersToEnclosingVariableOrCapture, | |||
403 | DeclarationNameInfo(D->getDeclName(), NameLoc), | |||
404 | T, VK, FoundD, TemplateArgs); | |||
405 | } | |||
406 | ||||
407 | DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context, | |||
408 | NestedNameSpecifierLoc QualifierLoc, | |||
409 | SourceLocation TemplateKWLoc, | |||
410 | ValueDecl *D, | |||
411 | bool RefersToEnclosingVariableOrCapture, | |||
412 | const DeclarationNameInfo &NameInfo, | |||
413 | QualType T, | |||
414 | ExprValueKind VK, | |||
415 | NamedDecl *FoundD, | |||
416 | const TemplateArgumentListInfo *TemplateArgs) { | |||
417 | // Filter out cases where the found Decl is the same as the value refenenced. | |||
418 | if (D == FoundD) | |||
419 | FoundD = nullptr; | |||
420 | ||||
421 | bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid(); | |||
422 | std::size_t Size = | |||
423 | totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *, | |||
424 | ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>( | |||
425 | QualifierLoc ? 1 : 0, FoundD ? 1 : 0, | |||
426 | HasTemplateKWAndArgsInfo ? 1 : 0, | |||
427 | TemplateArgs ? TemplateArgs->size() : 0); | |||
428 | ||||
429 | void *Mem = Context.Allocate(Size, alignof(DeclRefExpr)); | |||
430 | return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D, | |||
431 | RefersToEnclosingVariableOrCapture, | |||
432 | NameInfo, FoundD, TemplateArgs, T, VK); | |||
433 | } | |||
434 | ||||
435 | DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context, | |||
436 | bool HasQualifier, | |||
437 | bool HasFoundDecl, | |||
438 | bool HasTemplateKWAndArgsInfo, | |||
439 | unsigned NumTemplateArgs) { | |||
440 | assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)((NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo) ? static_cast <void> (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 440, __PRETTY_FUNCTION__)); | |||
441 | std::size_t Size = | |||
442 | totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *, | |||
443 | ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>( | |||
444 | HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo, | |||
445 | NumTemplateArgs); | |||
446 | void *Mem = Context.Allocate(Size, alignof(DeclRefExpr)); | |||
447 | return new (Mem) DeclRefExpr(EmptyShell()); | |||
448 | } | |||
449 | ||||
450 | SourceLocation DeclRefExpr::getBeginLoc() const { | |||
451 | if (hasQualifier()) | |||
452 | return getQualifierLoc().getBeginLoc(); | |||
453 | return getNameInfo().getBeginLoc(); | |||
454 | } | |||
455 | SourceLocation DeclRefExpr::getEndLoc() const { | |||
456 | if (hasExplicitTemplateArgs()) | |||
457 | return getRAngleLoc(); | |||
458 | return getNameInfo().getEndLoc(); | |||
459 | } | |||
460 | ||||
461 | PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK, | |||
462 | StringLiteral *SL) | |||
463 | : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary, | |||
464 | FNTy->isDependentType(), FNTy->isDependentType(), | |||
465 | FNTy->isInstantiationDependentType(), | |||
466 | /*ContainsUnexpandedParameterPack=*/false) { | |||
467 | PredefinedExprBits.Kind = IK; | |||
468 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 469, __PRETTY_FUNCTION__)) | |||
469 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 469, __PRETTY_FUNCTION__)); | |||
470 | bool HasFunctionName = SL != nullptr; | |||
471 | PredefinedExprBits.HasFunctionName = HasFunctionName; | |||
472 | PredefinedExprBits.Loc = L; | |||
473 | if (HasFunctionName) | |||
474 | setFunctionName(SL); | |||
475 | } | |||
476 | ||||
477 | PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName) | |||
478 | : Expr(PredefinedExprClass, Empty) { | |||
479 | PredefinedExprBits.HasFunctionName = HasFunctionName; | |||
480 | } | |||
481 | ||||
482 | PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L, | |||
483 | QualType FNTy, IdentKind IK, | |||
484 | StringLiteral *SL) { | |||
485 | bool HasFunctionName = SL != nullptr; | |||
486 | void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName), | |||
487 | alignof(PredefinedExpr)); | |||
488 | return new (Mem) PredefinedExpr(L, FNTy, IK, SL); | |||
489 | } | |||
490 | ||||
491 | PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx, | |||
492 | bool HasFunctionName) { | |||
493 | void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName), | |||
494 | alignof(PredefinedExpr)); | |||
495 | return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName); | |||
496 | } | |||
497 | ||||
498 | StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) { | |||
499 | switch (IK) { | |||
500 | case Func: | |||
501 | return "__func__"; | |||
502 | case Function: | |||
503 | return "__FUNCTION__"; | |||
504 | case FuncDName: | |||
505 | return "__FUNCDNAME__"; | |||
506 | case LFunction: | |||
507 | return "L__FUNCTION__"; | |||
508 | case PrettyFunction: | |||
509 | return "__PRETTY_FUNCTION__"; | |||
510 | case FuncSig: | |||
511 | return "__FUNCSIG__"; | |||
512 | case LFuncSig: | |||
513 | return "L__FUNCSIG__"; | |||
514 | case PrettyFunctionNoVirtual: | |||
515 | break; | |||
516 | } | |||
517 | llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 517); | |||
518 | } | |||
519 | ||||
520 | // FIXME: Maybe this should use DeclPrinter with a special "print predefined | |||
521 | // expr" policy instead. | |||
522 | std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) { | |||
523 | ASTContext &Context = CurrentDecl->getASTContext(); | |||
524 | ||||
525 | if (IK == PredefinedExpr::FuncDName) { | |||
526 | if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) { | |||
527 | std::unique_ptr<MangleContext> MC; | |||
528 | MC.reset(Context.createMangleContext()); | |||
529 | ||||
530 | if (MC->shouldMangleDeclName(ND)) { | |||
531 | SmallString<256> Buffer; | |||
532 | llvm::raw_svector_ostream Out(Buffer); | |||
533 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND)) | |||
534 | MC->mangleCXXCtor(CD, Ctor_Base, Out); | |||
535 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND)) | |||
536 | MC->mangleCXXDtor(DD, Dtor_Base, Out); | |||
537 | else | |||
538 | MC->mangleName(ND, Out); | |||
539 | ||||
540 | if (!Buffer.empty() && Buffer.front() == '\01') | |||
541 | return Buffer.substr(1); | |||
542 | return Buffer.str(); | |||
543 | } else | |||
544 | return ND->getIdentifier()->getName(); | |||
545 | } | |||
546 | return ""; | |||
547 | } | |||
548 | if (isa<BlockDecl>(CurrentDecl)) { | |||
549 | // For blocks we only emit something if it is enclosed in a function | |||
550 | // For top-level block we'd like to include the name of variable, but we | |||
551 | // don't have it at this point. | |||
552 | auto DC = CurrentDecl->getDeclContext(); | |||
553 | if (DC->isFileContext()) | |||
554 | return ""; | |||
555 | ||||
556 | SmallString<256> Buffer; | |||
557 | llvm::raw_svector_ostream Out(Buffer); | |||
558 | if (auto *DCBlock = dyn_cast<BlockDecl>(DC)) | |||
559 | // For nested blocks, propagate up to the parent. | |||
560 | Out << ComputeName(IK, DCBlock); | |||
561 | else if (auto *DCDecl = dyn_cast<Decl>(DC)) | |||
562 | Out << ComputeName(IK, DCDecl) << "_block_invoke"; | |||
563 | return Out.str(); | |||
564 | } | |||
565 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) { | |||
566 | if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual && | |||
567 | IK != FuncSig && IK != LFuncSig) | |||
568 | return FD->getNameAsString(); | |||
569 | ||||
570 | SmallString<256> Name; | |||
571 | llvm::raw_svector_ostream Out(Name); | |||
572 | ||||
573 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | |||
574 | if (MD->isVirtual() && IK != PrettyFunctionNoVirtual) | |||
575 | Out << "virtual "; | |||
576 | if (MD->isStatic()) | |||
577 | Out << "static "; | |||
578 | } | |||
579 | ||||
580 | PrintingPolicy Policy(Context.getLangOpts()); | |||
581 | std::string Proto; | |||
582 | llvm::raw_string_ostream POut(Proto); | |||
583 | ||||
584 | const FunctionDecl *Decl = FD; | |||
585 | if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern()) | |||
586 | Decl = Pattern; | |||
587 | const FunctionType *AFT = Decl->getType()->getAs<FunctionType>(); | |||
588 | const FunctionProtoType *FT = nullptr; | |||
589 | if (FD->hasWrittenPrototype()) | |||
590 | FT = dyn_cast<FunctionProtoType>(AFT); | |||
591 | ||||
592 | if (IK == FuncSig || IK == LFuncSig) { | |||
593 | switch (AFT->getCallConv()) { | |||
594 | case CC_C: POut << "__cdecl "; break; | |||
595 | case CC_X86StdCall: POut << "__stdcall "; break; | |||
596 | case CC_X86FastCall: POut << "__fastcall "; break; | |||
597 | case CC_X86ThisCall: POut << "__thiscall "; break; | |||
598 | case CC_X86VectorCall: POut << "__vectorcall "; break; | |||
599 | case CC_X86RegCall: POut << "__regcall "; break; | |||
600 | // Only bother printing the conventions that MSVC knows about. | |||
601 | default: break; | |||
602 | } | |||
603 | } | |||
604 | ||||
605 | FD->printQualifiedName(POut, Policy); | |||
606 | ||||
607 | POut << "("; | |||
608 | if (FT) { | |||
609 | for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) { | |||
610 | if (i) POut << ", "; | |||
611 | POut << Decl->getParamDecl(i)->getType().stream(Policy); | |||
612 | } | |||
613 | ||||
614 | if (FT->isVariadic()) { | |||
615 | if (FD->getNumParams()) POut << ", "; | |||
616 | POut << "..."; | |||
617 | } else if ((IK == FuncSig || IK == LFuncSig || | |||
618 | !Context.getLangOpts().CPlusPlus) && | |||
619 | !Decl->getNumParams()) { | |||
620 | POut << "void"; | |||
621 | } | |||
622 | } | |||
623 | POut << ")"; | |||
624 | ||||
625 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | |||
626 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 626, __PRETTY_FUNCTION__)); | |||
627 | if (FT->isConst()) | |||
628 | POut << " const"; | |||
629 | if (FT->isVolatile()) | |||
630 | POut << " volatile"; | |||
631 | RefQualifierKind Ref = MD->getRefQualifier(); | |||
632 | if (Ref == RQ_LValue) | |||
633 | POut << " &"; | |||
634 | else if (Ref == RQ_RValue) | |||
635 | POut << " &&"; | |||
636 | } | |||
637 | ||||
638 | typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy; | |||
639 | SpecsTy Specs; | |||
640 | const DeclContext *Ctx = FD->getDeclContext(); | |||
641 | while (Ctx && isa<NamedDecl>(Ctx)) { | |||
642 | const ClassTemplateSpecializationDecl *Spec | |||
643 | = dyn_cast<ClassTemplateSpecializationDecl>(Ctx); | |||
644 | if (Spec && !Spec->isExplicitSpecialization()) | |||
645 | Specs.push_back(Spec); | |||
646 | Ctx = Ctx->getParent(); | |||
647 | } | |||
648 | ||||
649 | std::string TemplateParams; | |||
650 | llvm::raw_string_ostream TOut(TemplateParams); | |||
651 | for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend(); | |||
652 | I != E; ++I) { | |||
653 | const TemplateParameterList *Params | |||
654 | = (*I)->getSpecializedTemplate()->getTemplateParameters(); | |||
655 | const TemplateArgumentList &Args = (*I)->getTemplateArgs(); | |||
656 | assert(Params->size() == Args.size())((Params->size() == Args.size()) ? static_cast<void> (0) : __assert_fail ("Params->size() == Args.size()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 656, __PRETTY_FUNCTION__)); | |||
657 | for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) { | |||
658 | StringRef Param = Params->getParam(i)->getName(); | |||
659 | if (Param.empty()) continue; | |||
660 | TOut << Param << " = "; | |||
661 | Args.get(i).print(Policy, TOut); | |||
662 | TOut << ", "; | |||
663 | } | |||
664 | } | |||
665 | ||||
666 | FunctionTemplateSpecializationInfo *FSI | |||
667 | = FD->getTemplateSpecializationInfo(); | |||
668 | if (FSI && !FSI->isExplicitSpecialization()) { | |||
669 | const TemplateParameterList* Params | |||
670 | = FSI->getTemplate()->getTemplateParameters(); | |||
671 | const TemplateArgumentList* Args = FSI->TemplateArguments; | |||
672 | assert(Params->size() == Args->size())((Params->size() == Args->size()) ? static_cast<void > (0) : __assert_fail ("Params->size() == Args->size()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 672, __PRETTY_FUNCTION__)); | |||
673 | for (unsigned i = 0, e = Params->size(); i != e; ++i) { | |||
674 | StringRef Param = Params->getParam(i)->getName(); | |||
675 | if (Param.empty()) continue; | |||
676 | TOut << Param << " = "; | |||
677 | Args->get(i).print(Policy, TOut); | |||
678 | TOut << ", "; | |||
679 | } | |||
680 | } | |||
681 | ||||
682 | TOut.flush(); | |||
683 | if (!TemplateParams.empty()) { | |||
684 | // remove the trailing comma and space | |||
685 | TemplateParams.resize(TemplateParams.size() - 2); | |||
686 | POut << " [" << TemplateParams << "]"; | |||
687 | } | |||
688 | ||||
689 | POut.flush(); | |||
690 | ||||
691 | // Print "auto" for all deduced return types. This includes C++1y return | |||
692 | // type deduction and lambdas. For trailing return types resolve the | |||
693 | // decltype expression. Otherwise print the real type when this is | |||
694 | // not a constructor or destructor. | |||
695 | if (isa<CXXMethodDecl>(FD) && | |||
696 | cast<CXXMethodDecl>(FD)->getParent()->isLambda()) | |||
697 | Proto = "auto " + Proto; | |||
698 | else if (FT && FT->getReturnType()->getAs<DecltypeType>()) | |||
699 | FT->getReturnType() | |||
700 | ->getAs<DecltypeType>() | |||
701 | ->getUnderlyingType() | |||
702 | .getAsStringInternal(Proto, Policy); | |||
703 | else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD)) | |||
704 | AFT->getReturnType().getAsStringInternal(Proto, Policy); | |||
705 | ||||
706 | Out << Proto; | |||
707 | ||||
708 | return Name.str().str(); | |||
709 | } | |||
710 | if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) { | |||
711 | for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent()) | |||
712 | // Skip to its enclosing function or method, but not its enclosing | |||
713 | // CapturedDecl. | |||
714 | if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) { | |||
715 | const Decl *D = Decl::castFromDeclContext(DC); | |||
716 | return ComputeName(IK, D); | |||
717 | } | |||
718 | llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 718); | |||
719 | } | |||
720 | if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) { | |||
721 | SmallString<256> Name; | |||
722 | llvm::raw_svector_ostream Out(Name); | |||
723 | Out << (MD->isInstanceMethod() ? '-' : '+'); | |||
724 | Out << '['; | |||
725 | ||||
726 | // For incorrect code, there might not be an ObjCInterfaceDecl. Do | |||
727 | // a null check to avoid a crash. | |||
728 | if (const ObjCInterfaceDecl *ID = MD->getClassInterface()) | |||
729 | Out << *ID; | |||
730 | ||||
731 | if (const ObjCCategoryImplDecl *CID = | |||
732 | dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext())) | |||
733 | Out << '(' << *CID << ')'; | |||
734 | ||||
735 | Out << ' '; | |||
736 | MD->getSelector().print(Out); | |||
737 | Out << ']'; | |||
738 | ||||
739 | return Name.str().str(); | |||
740 | } | |||
741 | if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) { | |||
742 | // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string. | |||
743 | return "top level"; | |||
744 | } | |||
745 | return ""; | |||
746 | } | |||
747 | ||||
748 | void APNumericStorage::setIntValue(const ASTContext &C, | |||
749 | const llvm::APInt &Val) { | |||
750 | if (hasAllocation()) | |||
751 | C.Deallocate(pVal); | |||
752 | ||||
753 | BitWidth = Val.getBitWidth(); | |||
754 | unsigned NumWords = Val.getNumWords(); | |||
755 | const uint64_t* Words = Val.getRawData(); | |||
756 | if (NumWords > 1) { | |||
757 | pVal = new (C) uint64_t[NumWords]; | |||
758 | std::copy(Words, Words + NumWords, pVal); | |||
759 | } else if (NumWords == 1) | |||
760 | VAL = Words[0]; | |||
761 | else | |||
762 | VAL = 0; | |||
763 | } | |||
764 | ||||
765 | IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V, | |||
766 | QualType type, SourceLocation l) | |||
767 | : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false, | |||
768 | false, false), | |||
769 | Loc(l) { | |||
770 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 770, __PRETTY_FUNCTION__)); | |||
771 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 772, __PRETTY_FUNCTION__)) | |||
772 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 772, __PRETTY_FUNCTION__)); | |||
773 | setValue(C, V); | |||
774 | } | |||
775 | ||||
776 | IntegerLiteral * | |||
777 | IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V, | |||
778 | QualType type, SourceLocation l) { | |||
779 | return new (C) IntegerLiteral(C, V, type, l); | |||
780 | } | |||
781 | ||||
782 | IntegerLiteral * | |||
783 | IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) { | |||
784 | return new (C) IntegerLiteral(Empty); | |||
785 | } | |||
786 | ||||
787 | FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V, | |||
788 | QualType type, SourceLocation l, | |||
789 | unsigned Scale) | |||
790 | : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false, | |||
791 | false, false), | |||
792 | Loc(l), Scale(Scale) { | |||
793 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 793, __PRETTY_FUNCTION__)); | |||
794 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 795, __PRETTY_FUNCTION__)) | |||
795 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 795, __PRETTY_FUNCTION__)); | |||
796 | setValue(C, V); | |||
797 | } | |||
798 | ||||
799 | FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C, | |||
800 | const llvm::APInt &V, | |||
801 | QualType type, | |||
802 | SourceLocation l, | |||
803 | unsigned Scale) { | |||
804 | return new (C) FixedPointLiteral(C, V, type, l, Scale); | |||
805 | } | |||
806 | ||||
807 | std::string FixedPointLiteral::getValueAsString(unsigned Radix) const { | |||
808 | // Currently the longest decimal number that can be printed is the max for an | |||
809 | // unsigned long _Accum: 4294967295.99999999976716935634613037109375 | |||
810 | // which is 43 characters. | |||
811 | SmallString<64> S; | |||
812 | FixedPointValueToString( | |||
813 | S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale); | |||
814 | return S.str(); | |||
815 | } | |||
816 | ||||
817 | FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V, | |||
818 | bool isexact, QualType Type, SourceLocation L) | |||
819 | : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false, | |||
820 | false, false), Loc(L) { | |||
821 | setSemantics(V.getSemantics()); | |||
822 | FloatingLiteralBits.IsExact = isexact; | |||
823 | setValue(C, V); | |||
824 | } | |||
825 | ||||
826 | FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty) | |||
827 | : Expr(FloatingLiteralClass, Empty) { | |||
828 | setRawSemantics(IEEEhalf); | |||
829 | FloatingLiteralBits.IsExact = false; | |||
830 | } | |||
831 | ||||
832 | FloatingLiteral * | |||
833 | FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V, | |||
834 | bool isexact, QualType Type, SourceLocation L) { | |||
835 | return new (C) FloatingLiteral(C, V, isexact, Type, L); | |||
836 | } | |||
837 | ||||
838 | FloatingLiteral * | |||
839 | FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) { | |||
840 | return new (C) FloatingLiteral(C, Empty); | |||
841 | } | |||
842 | ||||
843 | const llvm::fltSemantics &FloatingLiteral::getSemantics() const { | |||
844 | switch(FloatingLiteralBits.Semantics) { | |||
845 | case IEEEhalf: | |||
846 | return llvm::APFloat::IEEEhalf(); | |||
847 | case IEEEsingle: | |||
848 | return llvm::APFloat::IEEEsingle(); | |||
849 | case IEEEdouble: | |||
850 | return llvm::APFloat::IEEEdouble(); | |||
851 | case x87DoubleExtended: | |||
852 | return llvm::APFloat::x87DoubleExtended(); | |||
853 | case IEEEquad: | |||
854 | return llvm::APFloat::IEEEquad(); | |||
855 | case PPCDoubleDouble: | |||
856 | return llvm::APFloat::PPCDoubleDouble(); | |||
857 | } | |||
858 | llvm_unreachable("Unrecognised floating semantics")::llvm::llvm_unreachable_internal("Unrecognised floating semantics" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 858); | |||
859 | } | |||
860 | ||||
861 | void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) { | |||
862 | if (&Sem == &llvm::APFloat::IEEEhalf()) | |||
863 | FloatingLiteralBits.Semantics = IEEEhalf; | |||
864 | else if (&Sem == &llvm::APFloat::IEEEsingle()) | |||
865 | FloatingLiteralBits.Semantics = IEEEsingle; | |||
866 | else if (&Sem == &llvm::APFloat::IEEEdouble()) | |||
867 | FloatingLiteralBits.Semantics = IEEEdouble; | |||
868 | else if (&Sem == &llvm::APFloat::x87DoubleExtended()) | |||
869 | FloatingLiteralBits.Semantics = x87DoubleExtended; | |||
870 | else if (&Sem == &llvm::APFloat::IEEEquad()) | |||
871 | FloatingLiteralBits.Semantics = IEEEquad; | |||
872 | else if (&Sem == &llvm::APFloat::PPCDoubleDouble()) | |||
873 | FloatingLiteralBits.Semantics = PPCDoubleDouble; | |||
874 | else | |||
875 | llvm_unreachable("Unknown floating semantics")::llvm::llvm_unreachable_internal("Unknown floating semantics" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 875); | |||
876 | } | |||
877 | ||||
878 | /// getValueAsApproximateDouble - This returns the value as an inaccurate | |||
879 | /// double. Note that this may cause loss of precision, but is useful for | |||
880 | /// debugging dumps, etc. | |||
881 | double FloatingLiteral::getValueAsApproximateDouble() const { | |||
882 | llvm::APFloat V = getValue(); | |||
883 | bool ignored; | |||
884 | V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven, | |||
885 | &ignored); | |||
886 | return V.convertToDouble(); | |||
887 | } | |||
888 | ||||
889 | int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) { | |||
890 | int CharByteWidth = 0; | |||
891 | switch(k) { | |||
892 | case Ascii: | |||
893 | case UTF8: | |||
894 | CharByteWidth = target.getCharWidth(); | |||
895 | break; | |||
896 | case Wide: | |||
897 | CharByteWidth = target.getWCharWidth(); | |||
898 | break; | |||
899 | case UTF16: | |||
900 | CharByteWidth = target.getChar16Width(); | |||
901 | break; | |||
902 | case UTF32: | |||
903 | CharByteWidth = target.getChar32Width(); | |||
904 | break; | |||
905 | } | |||
906 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 906, __PRETTY_FUNCTION__)); | |||
907 | CharByteWidth /= 8; | |||
908 | assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)(((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && "character byte widths supported are 1, 2, and 4 only") ? static_cast <void> (0) : __assert_fail ("(CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && \"character byte widths supported are 1, 2, and 4 only\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 909, __PRETTY_FUNCTION__)) | |||
909 | && "character byte widths supported are 1, 2, and 4 only")(((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && "character byte widths supported are 1, 2, and 4 only") ? static_cast <void> (0) : __assert_fail ("(CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && \"character byte widths supported are 1, 2, and 4 only\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 909, __PRETTY_FUNCTION__)); | |||
910 | return CharByteWidth; | |||
911 | } | |||
912 | ||||
913 | StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str, | |||
914 | StringKind Kind, bool Pascal, QualType Ty, | |||
915 | const SourceLocation *Loc, | |||
916 | unsigned NumStrs) { | |||
917 | assert(C.getAsConstantArrayType(Ty) &&((C.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!" ) ? static_cast<void> (0) : __assert_fail ("C.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 918, __PRETTY_FUNCTION__)) | |||
918 | "StringLiteral must be of constant array type!")((C.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!" ) ? static_cast<void> (0) : __assert_fail ("C.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 918, __PRETTY_FUNCTION__)); | |||
919 | ||||
920 | // Allocate enough space for the StringLiteral plus an array of locations for | |||
921 | // any concatenated string tokens. | |||
922 | void *Mem = | |||
923 | C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1), | |||
924 | alignof(StringLiteral)); | |||
925 | StringLiteral *SL = new (Mem) StringLiteral(Ty); | |||
926 | ||||
927 | // OPTIMIZE: could allocate this appended to the StringLiteral. | |||
928 | SL->setString(C,Str,Kind,Pascal); | |||
929 | ||||
930 | SL->TokLocs[0] = Loc[0]; | |||
931 | SL->NumConcatenated = NumStrs; | |||
932 | ||||
933 | if (NumStrs != 1) | |||
934 | memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1)); | |||
935 | return SL; | |||
936 | } | |||
937 | ||||
938 | StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C, | |||
939 | unsigned NumStrs) { | |||
940 | void *Mem = | |||
941 | C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1), | |||
942 | alignof(StringLiteral)); | |||
943 | StringLiteral *SL = | |||
944 | new (Mem) StringLiteral(C.adjustStringLiteralBaseType(QualType())); | |||
945 | SL->CharByteWidth = 0; | |||
946 | SL->Length = 0; | |||
947 | SL->NumConcatenated = NumStrs; | |||
948 | return SL; | |||
949 | } | |||
950 | ||||
951 | void StringLiteral::outputString(raw_ostream &OS) const { | |||
952 | switch (getKind()) { | |||
953 | case Ascii: break; // no prefix. | |||
954 | case Wide: OS << 'L'; break; | |||
955 | case UTF8: OS << "u8"; break; | |||
956 | case UTF16: OS << 'u'; break; | |||
957 | case UTF32: OS << 'U'; break; | |||
958 | } | |||
959 | OS << '"'; | |||
960 | static const char Hex[] = "0123456789ABCDEF"; | |||
961 | ||||
962 | unsigned LastSlashX = getLength(); | |||
963 | for (unsigned I = 0, N = getLength(); I != N; ++I) { | |||
964 | switch (uint32_t Char = getCodeUnit(I)) { | |||
965 | default: | |||
966 | // FIXME: Convert UTF-8 back to codepoints before rendering. | |||
967 | ||||
968 | // Convert UTF-16 surrogate pairs back to codepoints before rendering. | |||
969 | // Leave invalid surrogates alone; we'll use \x for those. | |||
970 | if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 && | |||
971 | Char <= 0xdbff) { | |||
972 | uint32_t Trail = getCodeUnit(I + 1); | |||
973 | if (Trail >= 0xdc00 && Trail <= 0xdfff) { | |||
974 | Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00); | |||
975 | ++I; | |||
976 | } | |||
977 | } | |||
978 | ||||
979 | if (Char > 0xff) { | |||
980 | // If this is a wide string, output characters over 0xff using \x | |||
981 | // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a | |||
982 | // codepoint: use \x escapes for invalid codepoints. | |||
983 | if (getKind() == Wide || | |||
984 | (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) { | |||
985 | // FIXME: Is this the best way to print wchar_t? | |||
986 | OS << "\\x"; | |||
987 | int Shift = 28; | |||
988 | while ((Char >> Shift) == 0) | |||
989 | Shift -= 4; | |||
990 | for (/**/; Shift >= 0; Shift -= 4) | |||
991 | OS << Hex[(Char >> Shift) & 15]; | |||
992 | LastSlashX = I; | |||
993 | break; | |||
994 | } | |||
995 | ||||
996 | if (Char > 0xffff) | |||
997 | OS << "\\U00" | |||
998 | << Hex[(Char >> 20) & 15] | |||
999 | << Hex[(Char >> 16) & 15]; | |||
1000 | else | |||
1001 | OS << "\\u"; | |||
1002 | OS << Hex[(Char >> 12) & 15] | |||
1003 | << Hex[(Char >> 8) & 15] | |||
1004 | << Hex[(Char >> 4) & 15] | |||
1005 | << Hex[(Char >> 0) & 15]; | |||
1006 | break; | |||
1007 | } | |||
1008 | ||||
1009 | // If we used \x... for the previous character, and this character is a | |||
1010 | // hexadecimal digit, prevent it being slurped as part of the \x. | |||
1011 | if (LastSlashX + 1 == I) { | |||
1012 | switch (Char) { | |||
1013 | case '0': case '1': case '2': case '3': case '4': | |||
1014 | case '5': case '6': case '7': case '8': case '9': | |||
1015 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |||
1016 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |||
1017 | OS << "\"\""; | |||
1018 | } | |||
1019 | } | |||
1020 | ||||
1021 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1022, __PRETTY_FUNCTION__)) | |||
1022 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1022, __PRETTY_FUNCTION__)); | |||
1023 | ||||
1024 | if (isPrintable(Char)) | |||
1025 | OS << (char)Char; | |||
1026 | else // Output anything hard as an octal escape. | |||
1027 | OS << '\\' | |||
1028 | << (char)('0' + ((Char >> 6) & 7)) | |||
1029 | << (char)('0' + ((Char >> 3) & 7)) | |||
1030 | << (char)('0' + ((Char >> 0) & 7)); | |||
1031 | break; | |||
1032 | // Handle some common non-printable cases to make dumps prettier. | |||
1033 | case '\\': OS << "\\\\"; break; | |||
1034 | case '"': OS << "\\\""; break; | |||
1035 | case '\a': OS << "\\a"; break; | |||
1036 | case '\b': OS << "\\b"; break; | |||
1037 | case '\f': OS << "\\f"; break; | |||
1038 | case '\n': OS << "\\n"; break; | |||
1039 | case '\r': OS << "\\r"; break; | |||
1040 | case '\t': OS << "\\t"; break; | |||
1041 | case '\v': OS << "\\v"; break; | |||
1042 | } | |||
1043 | } | |||
1044 | OS << '"'; | |||
1045 | } | |||
1046 | ||||
1047 | void StringLiteral::setString(const ASTContext &C, StringRef Str, | |||
1048 | StringKind Kind, bool IsPascal) { | |||
1049 | //FIXME: we assume that the string data comes from a target that uses the same | |||
1050 | // code unit size and endianness for the type of string. | |||
1051 | this->Kind = Kind; | |||
1052 | this->IsPascal = IsPascal; | |||
1053 | ||||
1054 | CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind); | |||
1055 | assert((Str.size()%CharByteWidth == 0)(((Str.size()%CharByteWidth == 0) && "size of data must be multiple of CharByteWidth" ) ? static_cast<void> (0) : __assert_fail ("(Str.size()%CharByteWidth == 0) && \"size of data must be multiple of CharByteWidth\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1056, __PRETTY_FUNCTION__)) | |||
1056 | && "size of data must be multiple of CharByteWidth")(((Str.size()%CharByteWidth == 0) && "size of data must be multiple of CharByteWidth" ) ? static_cast<void> (0) : __assert_fail ("(Str.size()%CharByteWidth == 0) && \"size of data must be multiple of CharByteWidth\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1056, __PRETTY_FUNCTION__)); | |||
1057 | Length = Str.size()/CharByteWidth; | |||
1058 | ||||
1059 | switch(CharByteWidth) { | |||
1060 | case 1: { | |||
1061 | char *AStrData = new (C) char[Length]; | |||
1062 | std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); | |||
1063 | StrData.asChar = AStrData; | |||
1064 | break; | |||
1065 | } | |||
1066 | case 2: { | |||
1067 | uint16_t *AStrData = new (C) uint16_t[Length]; | |||
1068 | std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); | |||
1069 | StrData.asUInt16 = AStrData; | |||
1070 | break; | |||
1071 | } | |||
1072 | case 4: { | |||
1073 | uint32_t *AStrData = new (C) uint32_t[Length]; | |||
1074 | std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData)); | |||
1075 | StrData.asUInt32 = AStrData; | |||
1076 | break; | |||
1077 | } | |||
1078 | default: | |||
1079 | llvm_unreachable("unsupported CharByteWidth")::llvm::llvm_unreachable_internal("unsupported CharByteWidth" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1079); | |||
1080 | } | |||
1081 | } | |||
1082 | ||||
1083 | /// getLocationOfByte - Return a source location that points to the specified | |||
1084 | /// byte of this string literal. | |||
1085 | /// | |||
1086 | /// Strings are amazingly complex. They can be formed from multiple tokens and | |||
1087 | /// can have escape sequences in them in addition to the usual trigraph and | |||
1088 | /// escaped newline business. This routine handles this complexity. | |||
1089 | /// | |||
1090 | /// The *StartToken sets the first token to be searched in this function and | |||
1091 | /// the *StartTokenByteOffset is the byte offset of the first token. Before | |||
1092 | /// returning, it updates the *StartToken to the TokNo of the token being found | |||
1093 | /// and sets *StartTokenByteOffset to the byte offset of the token in the | |||
1094 | /// string. | |||
1095 | /// Using these two parameters can reduce the time complexity from O(n^2) to | |||
1096 | /// O(n) if one wants to get the location of byte for all the tokens in a | |||
1097 | /// string. | |||
1098 | /// | |||
1099 | SourceLocation | |||
1100 | StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM, | |||
1101 | const LangOptions &Features, | |||
1102 | const TargetInfo &Target, unsigned *StartToken, | |||
1103 | unsigned *StartTokenByteOffset) const { | |||
1104 | assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&(((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8 ) && "Only narrow string literals are currently supported" ) ? static_cast<void> (0) : __assert_fail ("(Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1105, __PRETTY_FUNCTION__)) | |||
1105 | "Only narrow string literals are currently supported")(((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8 ) && "Only narrow string literals are currently supported" ) ? static_cast<void> (0) : __assert_fail ("(Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1105, __PRETTY_FUNCTION__)); | |||
1106 | ||||
1107 | // Loop over all of the tokens in this string until we find the one that | |||
1108 | // contains the byte we're looking for. | |||
1109 | unsigned TokNo = 0; | |||
1110 | unsigned StringOffset = 0; | |||
1111 | if (StartToken) | |||
1112 | TokNo = *StartToken; | |||
1113 | if (StartTokenByteOffset) { | |||
1114 | StringOffset = *StartTokenByteOffset; | |||
1115 | ByteNo -= StringOffset; | |||
1116 | } | |||
1117 | while (1) { | |||
1118 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1118, __PRETTY_FUNCTION__)); | |||
1119 | SourceLocation StrTokLoc = getStrTokenLoc(TokNo); | |||
1120 | ||||
1121 | // Get the spelling of the string so that we can get the data that makes up | |||
1122 | // the string literal, not the identifier for the macro it is potentially | |||
1123 | // expanded through. | |||
1124 | SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc); | |||
1125 | ||||
1126 | // Re-lex the token to get its length and original spelling. | |||
1127 | std::pair<FileID, unsigned> LocInfo = | |||
1128 | SM.getDecomposedLoc(StrTokSpellingLoc); | |||
1129 | bool Invalid = false; | |||
1130 | StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid); | |||
1131 | if (Invalid) { | |||
1132 | if (StartTokenByteOffset != nullptr) | |||
1133 | *StartTokenByteOffset = StringOffset; | |||
1134 | if (StartToken != nullptr) | |||
1135 | *StartToken = TokNo; | |||
1136 | return StrTokSpellingLoc; | |||
1137 | } | |||
1138 | ||||
1139 | const char *StrData = Buffer.data()+LocInfo.second; | |||
1140 | ||||
1141 | // Create a lexer starting at the beginning of this token. | |||
1142 | Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features, | |||
1143 | Buffer.begin(), StrData, Buffer.end()); | |||
1144 | Token TheTok; | |||
1145 | TheLexer.LexFromRawLexer(TheTok); | |||
1146 | ||||
1147 | // Use the StringLiteralParser to compute the length of the string in bytes. | |||
1148 | StringLiteralParser SLP(TheTok, SM, Features, Target); | |||
1149 | unsigned TokNumBytes = SLP.GetStringLength(); | |||
1150 | ||||
1151 | // If the byte is in this token, return the location of the byte. | |||
1152 | if (ByteNo < TokNumBytes || | |||
1153 | (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) { | |||
1154 | unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo); | |||
1155 | ||||
1156 | // Now that we know the offset of the token in the spelling, use the | |||
1157 | // preprocessor to get the offset in the original source. | |||
1158 | if (StartTokenByteOffset != nullptr) | |||
1159 | *StartTokenByteOffset = StringOffset; | |||
1160 | if (StartToken != nullptr) | |||
1161 | *StartToken = TokNo; | |||
1162 | return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features); | |||
1163 | } | |||
1164 | ||||
1165 | // Move to the next string token. | |||
1166 | StringOffset += TokNumBytes; | |||
1167 | ++TokNo; | |||
1168 | ByteNo -= TokNumBytes; | |||
1169 | } | |||
1170 | } | |||
1171 | ||||
1172 | ||||
1173 | ||||
1174 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it | |||
1175 | /// corresponds to, e.g. "sizeof" or "[pre]++". | |||
1176 | StringRef UnaryOperator::getOpcodeStr(Opcode Op) { | |||
1177 | switch (Op) { | |||
1178 | #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling; | |||
1179 | #include "clang/AST/OperationKinds.def" | |||
1180 | } | |||
1181 | llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1181); | |||
1182 | } | |||
1183 | ||||
1184 | UnaryOperatorKind | |||
1185 | UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) { | |||
1186 | switch (OO) { | |||
1187 | default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1187); | |||
1188 | case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc; | |||
1189 | case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec; | |||
1190 | case OO_Amp: return UO_AddrOf; | |||
1191 | case OO_Star: return UO_Deref; | |||
1192 | case OO_Plus: return UO_Plus; | |||
1193 | case OO_Minus: return UO_Minus; | |||
1194 | case OO_Tilde: return UO_Not; | |||
1195 | case OO_Exclaim: return UO_LNot; | |||
1196 | case OO_Coawait: return UO_Coawait; | |||
1197 | } | |||
1198 | } | |||
1199 | ||||
1200 | OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) { | |||
1201 | switch (Opc) { | |||
1202 | case UO_PostInc: case UO_PreInc: return OO_PlusPlus; | |||
1203 | case UO_PostDec: case UO_PreDec: return OO_MinusMinus; | |||
1204 | case UO_AddrOf: return OO_Amp; | |||
1205 | case UO_Deref: return OO_Star; | |||
1206 | case UO_Plus: return OO_Plus; | |||
1207 | case UO_Minus: return OO_Minus; | |||
1208 | case UO_Not: return OO_Tilde; | |||
1209 | case UO_LNot: return OO_Exclaim; | |||
1210 | case UO_Coawait: return OO_Coawait; | |||
1211 | default: return OO_None; | |||
1212 | } | |||
1213 | } | |||
1214 | ||||
1215 | ||||
1216 | //===----------------------------------------------------------------------===// | |||
1217 | // Postfix Operators. | |||
1218 | //===----------------------------------------------------------------------===// | |||
1219 | ||||
1220 | CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn, | |||
1221 | ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t, | |||
1222 | ExprValueKind VK, SourceLocation rparenloc) | |||
1223 | : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(), | |||
1224 | fn->isValueDependent(), fn->isInstantiationDependent(), | |||
1225 | fn->containsUnexpandedParameterPack()), | |||
1226 | NumArgs(args.size()) { | |||
1227 | ||||
1228 | unsigned NumPreArgs = preargs.size(); | |||
1229 | SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs]; | |||
1230 | SubExprs[FN] = fn; | |||
1231 | for (unsigned i = 0; i != NumPreArgs; ++i) { | |||
1232 | updateDependenciesFromArg(preargs[i]); | |||
1233 | SubExprs[i+PREARGS_START] = preargs[i]; | |||
1234 | } | |||
1235 | for (unsigned i = 0; i != args.size(); ++i) { | |||
1236 | updateDependenciesFromArg(args[i]); | |||
1237 | SubExprs[i+PREARGS_START+NumPreArgs] = args[i]; | |||
1238 | } | |||
1239 | ||||
1240 | CallExprBits.NumPreArgs = NumPreArgs; | |||
1241 | RParenLoc = rparenloc; | |||
1242 | } | |||
1243 | ||||
1244 | CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn, | |||
1245 | ArrayRef<Expr *> args, QualType t, ExprValueKind VK, | |||
1246 | SourceLocation rparenloc) | |||
1247 | : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {} | |||
1248 | ||||
1249 | CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args, | |||
1250 | QualType t, ExprValueKind VK, SourceLocation rparenloc) | |||
1251 | : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) { | |||
1252 | } | |||
1253 | ||||
1254 | CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty) | |||
1255 | : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {} | |||
1256 | ||||
1257 | CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs, | |||
1258 | EmptyShell Empty) | |||
1259 | : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) { | |||
1260 | // FIXME: Why do we allocate this? | |||
1261 | SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs](); | |||
1262 | CallExprBits.NumPreArgs = NumPreArgs; | |||
1263 | } | |||
1264 | ||||
1265 | void CallExpr::updateDependenciesFromArg(Expr *Arg) { | |||
1266 | if (Arg->isTypeDependent()) | |||
1267 | ExprBits.TypeDependent = true; | |||
1268 | if (Arg->isValueDependent()) | |||
1269 | ExprBits.ValueDependent = true; | |||
1270 | if (Arg->isInstantiationDependent()) | |||
1271 | ExprBits.InstantiationDependent = true; | |||
1272 | if (Arg->containsUnexpandedParameterPack()) | |||
1273 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
1274 | } | |||
1275 | ||||
1276 | FunctionDecl *CallExpr::getDirectCallee() { | |||
1277 | return dyn_cast_or_null<FunctionDecl>(getCalleeDecl()); | |||
1278 | } | |||
1279 | ||||
1280 | Decl *CallExpr::getCalleeDecl() { | |||
1281 | return getCallee()->getReferencedDeclOfCallee(); | |||
1282 | } | |||
1283 | ||||
1284 | Decl *Expr::getReferencedDeclOfCallee() { | |||
1285 | Expr *CEE = IgnoreParenImpCasts(); | |||
1286 | ||||
1287 | while (SubstNonTypeTemplateParmExpr *NTTP | |||
1288 | = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) { | |||
1289 | CEE = NTTP->getReplacement()->IgnoreParenCasts(); | |||
1290 | } | |||
1291 | ||||
1292 | // If we're calling a dereference, look at the pointer instead. | |||
1293 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) { | |||
1294 | if (BO->isPtrMemOp()) | |||
1295 | CEE = BO->getRHS()->IgnoreParenCasts(); | |||
1296 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) { | |||
1297 | if (UO->getOpcode() == UO_Deref) | |||
1298 | CEE = UO->getSubExpr()->IgnoreParenCasts(); | |||
1299 | } | |||
1300 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) | |||
1301 | return DRE->getDecl(); | |||
1302 | if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE)) | |||
1303 | return ME->getMemberDecl(); | |||
1304 | ||||
1305 | return nullptr; | |||
1306 | } | |||
1307 | ||||
1308 | /// setNumArgs - This changes the number of arguments present in this call. | |||
1309 | /// Any orphaned expressions are deleted by this, and any new operands are set | |||
1310 | /// to null. | |||
1311 | void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) { | |||
1312 | // No change, just return. | |||
1313 | if (NumArgs == getNumArgs()) return; | |||
1314 | ||||
1315 | // If shrinking # arguments, just delete the extras and forgot them. | |||
1316 | if (NumArgs < getNumArgs()) { | |||
1317 | this->NumArgs = NumArgs; | |||
1318 | return; | |||
1319 | } | |||
1320 | ||||
1321 | // Otherwise, we are growing the # arguments. New an bigger argument array. | |||
1322 | unsigned NumPreArgs = getNumPreArgs(); | |||
1323 | Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs]; | |||
1324 | // Copy over args. | |||
1325 | for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i) | |||
1326 | NewSubExprs[i] = SubExprs[i]; | |||
1327 | // Null out new args. | |||
1328 | for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs; | |||
1329 | i != NumArgs+PREARGS_START+NumPreArgs; ++i) | |||
1330 | NewSubExprs[i] = nullptr; | |||
1331 | ||||
1332 | if (SubExprs) C.Deallocate(SubExprs); | |||
1333 | SubExprs = NewSubExprs; | |||
1334 | this->NumArgs = NumArgs; | |||
1335 | } | |||
1336 | ||||
1337 | /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If | |||
1338 | /// not, return 0. | |||
1339 | unsigned CallExpr::getBuiltinCallee() const { | |||
1340 | // All simple function calls (e.g. func()) are implicitly cast to pointer to | |||
1341 | // function. As a result, we try and obtain the DeclRefExpr from the | |||
1342 | // ImplicitCastExpr. | |||
1343 | const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); | |||
1344 | if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). | |||
1345 | return 0; | |||
1346 | ||||
1347 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); | |||
1348 | if (!DRE) | |||
1349 | return 0; | |||
1350 | ||||
1351 | const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); | |||
1352 | if (!FDecl) | |||
1353 | return 0; | |||
1354 | ||||
1355 | if (!FDecl->getIdentifier()) | |||
1356 | return 0; | |||
1357 | ||||
1358 | return FDecl->getBuiltinID(); | |||
1359 | } | |||
1360 | ||||
1361 | bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const { | |||
1362 | if (unsigned BI = getBuiltinCallee()) | |||
1363 | return Ctx.BuiltinInfo.isUnevaluated(BI); | |||
1364 | return false; | |||
1365 | } | |||
1366 | ||||
1367 | QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const { | |||
1368 | const Expr *Callee = getCallee(); | |||
1369 | QualType CalleeType = Callee->getType(); | |||
1370 | if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) { | |||
1371 | CalleeType = FnTypePtr->getPointeeType(); | |||
1372 | } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) { | |||
1373 | CalleeType = BPT->getPointeeType(); | |||
1374 | } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) { | |||
1375 | if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens())) | |||
1376 | return Ctx.VoidTy; | |||
1377 | ||||
1378 | // This should never be overloaded and so should never return null. | |||
1379 | CalleeType = Expr::findBoundMemberType(Callee); | |||
1380 | } | |||
1381 | ||||
1382 | const FunctionType *FnType = CalleeType->castAs<FunctionType>(); | |||
1383 | return FnType->getReturnType(); | |||
1384 | } | |||
1385 | ||||
1386 | SourceLocation CallExpr::getBeginLoc() const { | |||
1387 | if (isa<CXXOperatorCallExpr>(this)) | |||
1388 | return cast<CXXOperatorCallExpr>(this)->getBeginLoc(); | |||
1389 | ||||
1390 | SourceLocation begin = getCallee()->getBeginLoc(); | |||
1391 | if (begin.isInvalid() && getNumArgs() > 0 && getArg(0)) | |||
1392 | begin = getArg(0)->getBeginLoc(); | |||
1393 | return begin; | |||
1394 | } | |||
1395 | SourceLocation CallExpr::getEndLoc() const { | |||
1396 | if (isa<CXXOperatorCallExpr>(this)) | |||
1397 | return cast<CXXOperatorCallExpr>(this)->getEndLoc(); | |||
1398 | ||||
1399 | SourceLocation end = getRParenLoc(); | |||
1400 | if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1)) | |||
1401 | end = getArg(getNumArgs() - 1)->getEndLoc(); | |||
1402 | return end; | |||
1403 | } | |||
1404 | ||||
1405 | OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type, | |||
1406 | SourceLocation OperatorLoc, | |||
1407 | TypeSourceInfo *tsi, | |||
1408 | ArrayRef<OffsetOfNode> comps, | |||
1409 | ArrayRef<Expr*> exprs, | |||
1410 | SourceLocation RParenLoc) { | |||
1411 | void *Mem = C.Allocate( | |||
1412 | totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size())); | |||
1413 | ||||
1414 | return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs, | |||
1415 | RParenLoc); | |||
1416 | } | |||
1417 | ||||
1418 | OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C, | |||
1419 | unsigned numComps, unsigned numExprs) { | |||
1420 | void *Mem = | |||
1421 | C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs)); | |||
1422 | return new (Mem) OffsetOfExpr(numComps, numExprs); | |||
1423 | } | |||
1424 | ||||
1425 | OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type, | |||
1426 | SourceLocation OperatorLoc, TypeSourceInfo *tsi, | |||
1427 | ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs, | |||
1428 | SourceLocation RParenLoc) | |||
1429 | : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary, | |||
1430 | /*TypeDependent=*/false, | |||
1431 | /*ValueDependent=*/tsi->getType()->isDependentType(), | |||
1432 | tsi->getType()->isInstantiationDependentType(), | |||
1433 | tsi->getType()->containsUnexpandedParameterPack()), | |||
1434 | OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi), | |||
1435 | NumComps(comps.size()), NumExprs(exprs.size()) | |||
1436 | { | |||
1437 | for (unsigned i = 0; i != comps.size(); ++i) { | |||
1438 | setComponent(i, comps[i]); | |||
1439 | } | |||
1440 | ||||
1441 | for (unsigned i = 0; i != exprs.size(); ++i) { | |||
1442 | if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent()) | |||
1443 | ExprBits.ValueDependent = true; | |||
1444 | if (exprs[i]->containsUnexpandedParameterPack()) | |||
1445 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
1446 | ||||
1447 | setIndexExpr(i, exprs[i]); | |||
1448 | } | |||
1449 | } | |||
1450 | ||||
1451 | IdentifierInfo *OffsetOfNode::getFieldName() const { | |||
1452 | assert(getKind() == Field || getKind() == Identifier)((getKind() == Field || getKind() == Identifier) ? static_cast <void> (0) : __assert_fail ("getKind() == Field || getKind() == Identifier" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1452, __PRETTY_FUNCTION__)); | |||
1453 | if (getKind() == Field) | |||
1454 | return getField()->getIdentifier(); | |||
1455 | ||||
1456 | return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask); | |||
1457 | } | |||
1458 | ||||
1459 | UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr( | |||
1460 | UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType, | |||
1461 | SourceLocation op, SourceLocation rp) | |||
1462 | : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary, | |||
1463 | false, // Never type-dependent (C++ [temp.dep.expr]p3). | |||
1464 | // Value-dependent if the argument is type-dependent. | |||
1465 | E->isTypeDependent(), E->isInstantiationDependent(), | |||
1466 | E->containsUnexpandedParameterPack()), | |||
1467 | OpLoc(op), RParenLoc(rp) { | |||
1468 | UnaryExprOrTypeTraitExprBits.Kind = ExprKind; | |||
1469 | UnaryExprOrTypeTraitExprBits.IsType = false; | |||
1470 | Argument.Ex = E; | |||
1471 | ||||
1472 | // Check to see if we are in the situation where alignof(decl) should be | |||
1473 | // dependent because decl's alignment is dependent. | |||
1474 | if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) { | |||
1475 | if (!isValueDependent() || !isInstantiationDependent()) { | |||
1476 | E = E->IgnoreParens(); | |||
1477 | ||||
1478 | const ValueDecl *D = nullptr; | |||
1479 | if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
1480 | D = DRE->getDecl(); | |||
1481 | else if (const auto *ME = dyn_cast<MemberExpr>(E)) | |||
1482 | D = ME->getMemberDecl(); | |||
1483 | ||||
1484 | if (D) { | |||
1485 | for (const auto *I : D->specific_attrs<AlignedAttr>()) { | |||
1486 | if (I->isAlignmentDependent()) { | |||
1487 | setValueDependent(true); | |||
1488 | setInstantiationDependent(true); | |||
1489 | break; | |||
1490 | } | |||
1491 | } | |||
1492 | } | |||
1493 | } | |||
1494 | } | |||
1495 | } | |||
1496 | ||||
1497 | MemberExpr *MemberExpr::Create( | |||
1498 | const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc, | |||
1499 | NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, | |||
1500 | ValueDecl *memberdecl, DeclAccessPair founddecl, | |||
1501 | DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs, | |||
1502 | QualType ty, ExprValueKind vk, ExprObjectKind ok) { | |||
1503 | ||||
1504 | bool hasQualOrFound = (QualifierLoc || | |||
1505 | founddecl.getDecl() != memberdecl || | |||
1506 | founddecl.getAccess() != memberdecl->getAccess()); | |||
1507 | ||||
1508 | bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid(); | |||
1509 | std::size_t Size = | |||
1510 | totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo, | |||
1511 | TemplateArgumentLoc>(hasQualOrFound ? 1 : 0, | |||
1512 | HasTemplateKWAndArgsInfo ? 1 : 0, | |||
1513 | targs ? targs->size() : 0); | |||
1514 | ||||
1515 | void *Mem = C.Allocate(Size, alignof(MemberExpr)); | |||
1516 | MemberExpr *E = new (Mem) | |||
1517 | MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok); | |||
1518 | ||||
1519 | if (hasQualOrFound) { | |||
1520 | // FIXME: Wrong. We should be looking at the member declaration we found. | |||
1521 | if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) { | |||
1522 | E->setValueDependent(true); | |||
1523 | E->setTypeDependent(true); | |||
1524 | E->setInstantiationDependent(true); | |||
1525 | } | |||
1526 | else if (QualifierLoc && | |||
1527 | QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent()) | |||
1528 | E->setInstantiationDependent(true); | |||
1529 | ||||
1530 | E->HasQualifierOrFoundDecl = true; | |||
1531 | ||||
1532 | MemberExprNameQualifier *NQ = | |||
1533 | E->getTrailingObjects<MemberExprNameQualifier>(); | |||
1534 | NQ->QualifierLoc = QualifierLoc; | |||
1535 | NQ->FoundDecl = founddecl; | |||
1536 | } | |||
1537 | ||||
1538 | E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid()); | |||
1539 | ||||
1540 | if (targs) { | |||
1541 | bool Dependent = false; | |||
1542 | bool InstantiationDependent = false; | |||
1543 | bool ContainsUnexpandedParameterPack = false; | |||
1544 | E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
1545 | TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(), | |||
1546 | Dependent, InstantiationDependent, ContainsUnexpandedParameterPack); | |||
1547 | if (InstantiationDependent) | |||
1548 | E->setInstantiationDependent(true); | |||
1549 | } else if (TemplateKWLoc.isValid()) { | |||
1550 | E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom( | |||
1551 | TemplateKWLoc); | |||
1552 | } | |||
1553 | ||||
1554 | return E; | |||
1555 | } | |||
1556 | ||||
1557 | SourceLocation MemberExpr::getBeginLoc() const { | |||
1558 | if (isImplicitAccess()) { | |||
1559 | if (hasQualifier()) | |||
1560 | return getQualifierLoc().getBeginLoc(); | |||
1561 | return MemberLoc; | |||
1562 | } | |||
1563 | ||||
1564 | // FIXME: We don't want this to happen. Rather, we should be able to | |||
1565 | // detect all kinds of implicit accesses more cleanly. | |||
1566 | SourceLocation BaseStartLoc = getBase()->getBeginLoc(); | |||
1567 | if (BaseStartLoc.isValid()) | |||
1568 | return BaseStartLoc; | |||
1569 | return MemberLoc; | |||
1570 | } | |||
1571 | SourceLocation MemberExpr::getEndLoc() const { | |||
1572 | SourceLocation EndLoc = getMemberNameInfo().getEndLoc(); | |||
1573 | if (hasExplicitTemplateArgs()) | |||
1574 | EndLoc = getRAngleLoc(); | |||
1575 | else if (EndLoc.isInvalid()) | |||
1576 | EndLoc = getBase()->getEndLoc(); | |||
1577 | return EndLoc; | |||
1578 | } | |||
1579 | ||||
1580 | bool CastExpr::CastConsistency() const { | |||
1581 | switch (getCastKind()) { | |||
1582 | case CK_DerivedToBase: | |||
1583 | case CK_UncheckedDerivedToBase: | |||
1584 | case CK_DerivedToBaseMemberPointer: | |||
1585 | case CK_BaseToDerived: | |||
1586 | case CK_BaseToDerivedMemberPointer: | |||
1587 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1587, __PRETTY_FUNCTION__)); | |||
1588 | break; | |||
1589 | ||||
1590 | case CK_CPointerToObjCPointerCast: | |||
1591 | assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1591, __PRETTY_FUNCTION__)); | |||
1592 | assert(getSubExpr()->getType()->isPointerType())((getSubExpr()->getType()->isPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1592, __PRETTY_FUNCTION__)); | |||
1593 | goto CheckNoBasePath; | |||
1594 | ||||
1595 | case CK_BlockPointerToObjCPointerCast: | |||
1596 | assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1596, __PRETTY_FUNCTION__)); | |||
1597 | assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1597, __PRETTY_FUNCTION__)); | |||
1598 | goto CheckNoBasePath; | |||
1599 | ||||
1600 | case CK_ReinterpretMemberPointer: | |||
1601 | assert(getType()->isMemberPointerType())((getType()->isMemberPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isMemberPointerType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1601, __PRETTY_FUNCTION__)); | |||
1602 | assert(getSubExpr()->getType()->isMemberPointerType())((getSubExpr()->getType()->isMemberPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1602, __PRETTY_FUNCTION__)); | |||
1603 | goto CheckNoBasePath; | |||
1604 | ||||
1605 | case CK_BitCast: | |||
1606 | // Arbitrary casts to C pointer types count as bitcasts. | |||
1607 | // Otherwise, we should only have block and ObjC pointer casts | |||
1608 | // here if they stay within the type kind. | |||
1609 | if (!getType()->isPointerType()) { | |||
1610 | assert(getType()->isObjCObjectPointerType() ==((getType()->isObjCObjectPointerType() == getSubExpr()-> getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1611, __PRETTY_FUNCTION__)) | |||
1611 | getSubExpr()->getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType() == getSubExpr()-> getType()->isObjCObjectPointerType()) ? static_cast<void > (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1611, __PRETTY_FUNCTION__)); | |||
1612 | assert(getType()->isBlockPointerType() ==((getType()->isBlockPointerType() == getSubExpr()->getType ()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1613, __PRETTY_FUNCTION__)) | |||
1613 | getSubExpr()->getType()->isBlockPointerType())((getType()->isBlockPointerType() == getSubExpr()->getType ()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1613, __PRETTY_FUNCTION__)); | |||
1614 | } | |||
1615 | goto CheckNoBasePath; | |||
1616 | ||||
1617 | case CK_AnyPointerToBlockPointerCast: | |||
1618 | assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1618, __PRETTY_FUNCTION__)); | |||
1619 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1620, __PRETTY_FUNCTION__)) | |||
1620 | !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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1620, __PRETTY_FUNCTION__)); | |||
1621 | goto CheckNoBasePath; | |||
1622 | ||||
1623 | case CK_CopyAndAutoreleaseBlockObject: | |||
1624 | assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1624, __PRETTY_FUNCTION__)); | |||
1625 | assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1625, __PRETTY_FUNCTION__)); | |||
1626 | goto CheckNoBasePath; | |||
1627 | ||||
1628 | case CK_FunctionToPointerDecay: | |||
1629 | assert(getType()->isPointerType())((getType()->isPointerType()) ? static_cast<void> (0 ) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1629, __PRETTY_FUNCTION__)); | |||
1630 | assert(getSubExpr()->getType()->isFunctionType())((getSubExpr()->getType()->isFunctionType()) ? static_cast <void> (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1630, __PRETTY_FUNCTION__)); | |||
1631 | goto CheckNoBasePath; | |||
1632 | ||||
1633 | case CK_AddressSpaceConversion: | |||
1634 | assert(getType()->isPointerType() || getType()->isBlockPointerType())((getType()->isPointerType() || getType()->isBlockPointerType ()) ? static_cast<void> (0) : __assert_fail ("getType()->isPointerType() || getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1634, __PRETTY_FUNCTION__)); | |||
1635 | assert(getSubExpr()->getType()->isPointerType() ||((getSubExpr()->getType()->isPointerType() || getSubExpr ()->getType()->isBlockPointerType()) ? static_cast<void > (0) : __assert_fail ("getSubExpr()->getType()->isPointerType() || getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1636, __PRETTY_FUNCTION__)) | |||
1636 | getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isPointerType() || getSubExpr ()->getType()->isBlockPointerType()) ? static_cast<void > (0) : __assert_fail ("getSubExpr()->getType()->isPointerType() || getSubExpr()->getType()->isBlockPointerType()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1636, __PRETTY_FUNCTION__)); | |||
1637 | assert(getType()->getPointeeType().getAddressSpace() !=((getType()->getPointeeType().getAddressSpace() != getSubExpr ()->getType()->getPointeeType().getAddressSpace()) ? static_cast <void> (0) : __assert_fail ("getType()->getPointeeType().getAddressSpace() != getSubExpr()->getType()->getPointeeType().getAddressSpace()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1638, __PRETTY_FUNCTION__)) | |||
1638 | getSubExpr()->getType()->getPointeeType().getAddressSpace())((getType()->getPointeeType().getAddressSpace() != getSubExpr ()->getType()->getPointeeType().getAddressSpace()) ? static_cast <void> (0) : __assert_fail ("getType()->getPointeeType().getAddressSpace() != getSubExpr()->getType()->getPointeeType().getAddressSpace()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1638, __PRETTY_FUNCTION__)); | |||
1639 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
1640 | // These should not have an inheritance path. | |||
1641 | case CK_Dynamic: | |||
1642 | case CK_ToUnion: | |||
1643 | case CK_ArrayToPointerDecay: | |||
1644 | case CK_NullToMemberPointer: | |||
1645 | case CK_NullToPointer: | |||
1646 | case CK_ConstructorConversion: | |||
1647 | case CK_IntegralToPointer: | |||
1648 | case CK_PointerToIntegral: | |||
1649 | case CK_ToVoid: | |||
1650 | case CK_VectorSplat: | |||
1651 | case CK_IntegralCast: | |||
1652 | case CK_BooleanToSignedIntegral: | |||
1653 | case CK_IntegralToFloating: | |||
1654 | case CK_FloatingToIntegral: | |||
1655 | case CK_FloatingCast: | |||
1656 | case CK_ObjCObjectLValueCast: | |||
1657 | case CK_FloatingRealToComplex: | |||
1658 | case CK_FloatingComplexToReal: | |||
1659 | case CK_FloatingComplexCast: | |||
1660 | case CK_FloatingComplexToIntegralComplex: | |||
1661 | case CK_IntegralRealToComplex: | |||
1662 | case CK_IntegralComplexToReal: | |||
1663 | case CK_IntegralComplexCast: | |||
1664 | case CK_IntegralComplexToFloatingComplex: | |||
1665 | case CK_ARCProduceObject: | |||
1666 | case CK_ARCConsumeObject: | |||
1667 | case CK_ARCReclaimReturnedObject: | |||
1668 | case CK_ARCExtendBlockObject: | |||
1669 | case CK_ZeroToOCLOpaqueType: | |||
1670 | case CK_IntToOCLSampler: | |||
1671 | case CK_FixedPointCast: | |||
1672 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1672, __PRETTY_FUNCTION__)); | |||
1673 | goto CheckNoBasePath; | |||
1674 | ||||
1675 | case CK_Dependent: | |||
1676 | case CK_LValueToRValue: | |||
1677 | case CK_NoOp: | |||
1678 | case CK_AtomicToNonAtomic: | |||
1679 | case CK_NonAtomicToAtomic: | |||
1680 | case CK_PointerToBoolean: | |||
1681 | case CK_IntegralToBoolean: | |||
1682 | case CK_FloatingToBoolean: | |||
1683 | case CK_MemberPointerToBoolean: | |||
1684 | case CK_FloatingComplexToBoolean: | |||
1685 | case CK_IntegralComplexToBoolean: | |||
1686 | case CK_LValueBitCast: // -> bool& | |||
1687 | case CK_UserDefinedConversion: // operator bool() | |||
1688 | case CK_BuiltinFnToFnPtr: | |||
1689 | case CK_FixedPointToBoolean: | |||
1690 | CheckNoBasePath: | |||
1691 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1691, __PRETTY_FUNCTION__)); | |||
1692 | break; | |||
1693 | } | |||
1694 | return true; | |||
1695 | } | |||
1696 | ||||
1697 | const char *CastExpr::getCastKindName(CastKind CK) { | |||
1698 | switch (CK) { | |||
1699 | #define CAST_OPERATION(Name) case CK_##Name: return #Name; | |||
1700 | #include "clang/AST/OperationKinds.def" | |||
1701 | } | |||
1702 | llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1702); | |||
1703 | } | |||
1704 | ||||
1705 | namespace { | |||
1706 | const Expr *skipImplicitTemporary(const Expr *E) { | |||
1707 | // Skip through reference binding to temporary. | |||
1708 | if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
1709 | E = Materialize->GetTemporaryExpr(); | |||
1710 | ||||
1711 | // Skip any temporary bindings; they're implicit. | |||
1712 | if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E)) | |||
1713 | E = Binder->getSubExpr(); | |||
1714 | ||||
1715 | return E; | |||
1716 | } | |||
1717 | } | |||
1718 | ||||
1719 | Expr *CastExpr::getSubExprAsWritten() { | |||
1720 | const Expr *SubExpr = nullptr; | |||
1721 | const CastExpr *E = this; | |||
1722 | do { | |||
1723 | SubExpr = skipImplicitTemporary(E->getSubExpr()); | |||
1724 | ||||
1725 | // Conversions by constructor and conversion functions have a | |||
1726 | // subexpression describing the call; strip it off. | |||
1727 | if (E->getCastKind() == CK_ConstructorConversion) | |||
1728 | SubExpr = | |||
1729 | skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0)); | |||
1730 | else if (E->getCastKind() == CK_UserDefinedConversion) { | |||
1731 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1733, __PRETTY_FUNCTION__)) | |||
1732 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1733, __PRETTY_FUNCTION__)) | |||
1733 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1733, __PRETTY_FUNCTION__)); | |||
1734 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr)) | |||
1735 | SubExpr = MCE->getImplicitObjectArgument(); | |||
1736 | } | |||
1737 | ||||
1738 | // If the subexpression we're left with is an implicit cast, look | |||
1739 | // through that, too. | |||
1740 | } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr))); | |||
1741 | ||||
1742 | return const_cast<Expr*>(SubExpr); | |||
1743 | } | |||
1744 | ||||
1745 | NamedDecl *CastExpr::getConversionFunction() const { | |||
1746 | const Expr *SubExpr = nullptr; | |||
1747 | ||||
1748 | for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) { | |||
1749 | SubExpr = skipImplicitTemporary(E->getSubExpr()); | |||
1750 | ||||
1751 | if (E->getCastKind() == CK_ConstructorConversion) | |||
1752 | return cast<CXXConstructExpr>(SubExpr)->getConstructor(); | |||
1753 | ||||
1754 | if (E->getCastKind() == CK_UserDefinedConversion) { | |||
1755 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr)) | |||
1756 | return MCE->getMethodDecl(); | |||
1757 | } | |||
1758 | } | |||
1759 | ||||
1760 | return nullptr; | |||
1761 | } | |||
1762 | ||||
1763 | CastExpr::BasePathSizeTy *CastExpr::BasePathSize() { | |||
1764 | assert(!path_empty())((!path_empty()) ? static_cast<void> (0) : __assert_fail ("!path_empty()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1764, __PRETTY_FUNCTION__)); | |||
1765 | switch (getStmtClass()) { | |||
1766 | #define ABSTRACT_STMT(x) | |||
1767 | #define CASTEXPR(Type, Base) \ | |||
1768 | case Stmt::Type##Class: \ | |||
1769 | return static_cast<Type *>(this) \ | |||
1770 | ->getTrailingObjects<CastExpr::BasePathSizeTy>(); | |||
1771 | #define STMT(Type, Base) | |||
1772 | #include "clang/AST/StmtNodes.inc" | |||
1773 | default: | |||
1774 | llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1774); | |||
1775 | } | |||
1776 | } | |||
1777 | ||||
1778 | CXXBaseSpecifier **CastExpr::path_buffer() { | |||
1779 | switch (getStmtClass()) { | |||
1780 | #define ABSTRACT_STMT(x) | |||
1781 | #define CASTEXPR(Type, Base) \ | |||
1782 | case Stmt::Type##Class: \ | |||
1783 | return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>(); | |||
1784 | #define STMT(Type, Base) | |||
1785 | #include "clang/AST/StmtNodes.inc" | |||
1786 | default: | |||
1787 | llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1787); | |||
1788 | } | |||
1789 | } | |||
1790 | ||||
1791 | const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType, | |||
1792 | QualType opType) { | |||
1793 | auto RD = unionType->castAs<RecordType>()->getDecl(); | |||
1794 | return getTargetFieldForToUnionCast(RD, opType); | |||
1795 | } | |||
1796 | ||||
1797 | const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD, | |||
1798 | QualType OpType) { | |||
1799 | auto &Ctx = RD->getASTContext(); | |||
1800 | RecordDecl::field_iterator Field, FieldEnd; | |||
1801 | for (Field = RD->field_begin(), FieldEnd = RD->field_end(); | |||
1802 | Field != FieldEnd; ++Field) { | |||
1803 | if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) && | |||
1804 | !Field->isUnnamedBitfield()) { | |||
1805 | return *Field; | |||
1806 | } | |||
1807 | } | |||
1808 | return nullptr; | |||
1809 | } | |||
1810 | ||||
1811 | ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T, | |||
1812 | CastKind Kind, Expr *Operand, | |||
1813 | const CXXCastPath *BasePath, | |||
1814 | ExprValueKind VK) { | |||
1815 | unsigned PathSize = (BasePath ? BasePath->size() : 0); | |||
1816 | void *Buffer = | |||
1817 | C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>( | |||
1818 | PathSize ? 1 : 0, PathSize)); | |||
1819 | ImplicitCastExpr *E = | |||
1820 | new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK); | |||
1821 | if (PathSize) | |||
1822 | std::uninitialized_copy_n(BasePath->data(), BasePath->size(), | |||
1823 | E->getTrailingObjects<CXXBaseSpecifier *>()); | |||
1824 | return E; | |||
1825 | } | |||
1826 | ||||
1827 | ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C, | |||
1828 | unsigned PathSize) { | |||
1829 | void *Buffer = | |||
1830 | C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>( | |||
1831 | PathSize ? 1 : 0, PathSize)); | |||
1832 | return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize); | |||
1833 | } | |||
1834 | ||||
1835 | ||||
1836 | CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T, | |||
1837 | ExprValueKind VK, CastKind K, Expr *Op, | |||
1838 | const CXXCastPath *BasePath, | |||
1839 | TypeSourceInfo *WrittenTy, | |||
1840 | SourceLocation L, SourceLocation R) { | |||
1841 | unsigned PathSize = (BasePath ? BasePath->size() : 0); | |||
1842 | void *Buffer = | |||
1843 | C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>( | |||
1844 | PathSize ? 1 : 0, PathSize)); | |||
1845 | CStyleCastExpr *E = | |||
1846 | new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R); | |||
1847 | if (PathSize) | |||
1848 | std::uninitialized_copy_n(BasePath->data(), BasePath->size(), | |||
1849 | E->getTrailingObjects<CXXBaseSpecifier *>()); | |||
1850 | return E; | |||
1851 | } | |||
1852 | ||||
1853 | CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C, | |||
1854 | unsigned PathSize) { | |||
1855 | void *Buffer = | |||
1856 | C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>( | |||
1857 | PathSize ? 1 : 0, PathSize)); | |||
1858 | return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize); | |||
1859 | } | |||
1860 | ||||
1861 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it | |||
1862 | /// corresponds to, e.g. "<<=". | |||
1863 | StringRef BinaryOperator::getOpcodeStr(Opcode Op) { | |||
1864 | switch (Op) { | |||
1865 | #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling; | |||
1866 | #include "clang/AST/OperationKinds.def" | |||
1867 | } | |||
1868 | llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1868); | |||
1869 | } | |||
1870 | ||||
1871 | BinaryOperatorKind | |||
1872 | BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) { | |||
1873 | switch (OO) { | |||
1874 | default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 1874); | |||
1875 | case OO_Plus: return BO_Add; | |||
1876 | case OO_Minus: return BO_Sub; | |||
1877 | case OO_Star: return BO_Mul; | |||
1878 | case OO_Slash: return BO_Div; | |||
1879 | case OO_Percent: return BO_Rem; | |||
1880 | case OO_Caret: return BO_Xor; | |||
1881 | case OO_Amp: return BO_And; | |||
1882 | case OO_Pipe: return BO_Or; | |||
1883 | case OO_Equal: return BO_Assign; | |||
1884 | case OO_Spaceship: return BO_Cmp; | |||
1885 | case OO_Less: return BO_LT; | |||
1886 | case OO_Greater: return BO_GT; | |||
1887 | case OO_PlusEqual: return BO_AddAssign; | |||
1888 | case OO_MinusEqual: return BO_SubAssign; | |||
1889 | case OO_StarEqual: return BO_MulAssign; | |||
1890 | case OO_SlashEqual: return BO_DivAssign; | |||
1891 | case OO_PercentEqual: return BO_RemAssign; | |||
1892 | case OO_CaretEqual: return BO_XorAssign; | |||
1893 | case OO_AmpEqual: return BO_AndAssign; | |||
1894 | case OO_PipeEqual: return BO_OrAssign; | |||
1895 | case OO_LessLess: return BO_Shl; | |||
1896 | case OO_GreaterGreater: return BO_Shr; | |||
1897 | case OO_LessLessEqual: return BO_ShlAssign; | |||
1898 | case OO_GreaterGreaterEqual: return BO_ShrAssign; | |||
1899 | case OO_EqualEqual: return BO_EQ; | |||
1900 | case OO_ExclaimEqual: return BO_NE; | |||
1901 | case OO_LessEqual: return BO_LE; | |||
1902 | case OO_GreaterEqual: return BO_GE; | |||
1903 | case OO_AmpAmp: return BO_LAnd; | |||
1904 | case OO_PipePipe: return BO_LOr; | |||
1905 | case OO_Comma: return BO_Comma; | |||
1906 | case OO_ArrowStar: return BO_PtrMemI; | |||
1907 | } | |||
1908 | } | |||
1909 | ||||
1910 | OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) { | |||
1911 | static const OverloadedOperatorKind OverOps[] = { | |||
1912 | /* .* Cannot be overloaded */OO_None, OO_ArrowStar, | |||
1913 | OO_Star, OO_Slash, OO_Percent, | |||
1914 | OO_Plus, OO_Minus, | |||
1915 | OO_LessLess, OO_GreaterGreater, | |||
1916 | OO_Spaceship, | |||
1917 | OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual, | |||
1918 | OO_EqualEqual, OO_ExclaimEqual, | |||
1919 | OO_Amp, | |||
1920 | OO_Caret, | |||
1921 | OO_Pipe, | |||
1922 | OO_AmpAmp, | |||
1923 | OO_PipePipe, | |||
1924 | OO_Equal, OO_StarEqual, | |||
1925 | OO_SlashEqual, OO_PercentEqual, | |||
1926 | OO_PlusEqual, OO_MinusEqual, | |||
1927 | OO_LessLessEqual, OO_GreaterGreaterEqual, | |||
1928 | OO_AmpEqual, OO_CaretEqual, | |||
1929 | OO_PipeEqual, | |||
1930 | OO_Comma | |||
1931 | }; | |||
1932 | return OverOps[Opc]; | |||
1933 | } | |||
1934 | ||||
1935 | bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx, | |||
1936 | Opcode Opc, | |||
1937 | Expr *LHS, Expr *RHS) { | |||
1938 | if (Opc != BO_Add) | |||
1939 | return false; | |||
1940 | ||||
1941 | // Check that we have one pointer and one integer operand. | |||
1942 | Expr *PExp; | |||
1943 | if (LHS->getType()->isPointerType()) { | |||
1944 | if (!RHS->getType()->isIntegerType()) | |||
1945 | return false; | |||
1946 | PExp = LHS; | |||
1947 | } else if (RHS->getType()->isPointerType()) { | |||
1948 | if (!LHS->getType()->isIntegerType()) | |||
1949 | return false; | |||
1950 | PExp = RHS; | |||
1951 | } else { | |||
1952 | return false; | |||
1953 | } | |||
1954 | ||||
1955 | // Check that the pointer is a nullptr. | |||
1956 | if (!PExp->IgnoreParenCasts() | |||
1957 | ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull)) | |||
1958 | return false; | |||
1959 | ||||
1960 | // Check that the pointee type is char-sized. | |||
1961 | const PointerType *PTy = PExp->getType()->getAs<PointerType>(); | |||
1962 | if (!PTy || !PTy->getPointeeType()->isCharType()) | |||
1963 | return false; | |||
1964 | ||||
1965 | return true; | |||
1966 | } | |||
1967 | InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc, | |||
1968 | ArrayRef<Expr*> initExprs, SourceLocation rbraceloc) | |||
1969 | : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false, | |||
1970 | false, false), | |||
1971 | InitExprs(C, initExprs.size()), | |||
1972 | LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true) | |||
1973 | { | |||
1974 | sawArrayRangeDesignator(false); | |||
1975 | for (unsigned I = 0; I != initExprs.size(); ++I) { | |||
1976 | if (initExprs[I]->isTypeDependent()) | |||
1977 | ExprBits.TypeDependent = true; | |||
1978 | if (initExprs[I]->isValueDependent()) | |||
1979 | ExprBits.ValueDependent = true; | |||
1980 | if (initExprs[I]->isInstantiationDependent()) | |||
1981 | ExprBits.InstantiationDependent = true; | |||
1982 | if (initExprs[I]->containsUnexpandedParameterPack()) | |||
1983 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
1984 | } | |||
1985 | ||||
1986 | InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end()); | |||
1987 | } | |||
1988 | ||||
1989 | void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) { | |||
1990 | if (NumInits > InitExprs.size()) | |||
1991 | InitExprs.reserve(C, NumInits); | |||
1992 | } | |||
1993 | ||||
1994 | void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) { | |||
1995 | InitExprs.resize(C, NumInits, nullptr); | |||
1996 | } | |||
1997 | ||||
1998 | Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) { | |||
1999 | if (Init >= InitExprs.size()) { | |||
2000 | InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr); | |||
2001 | setInit(Init, expr); | |||
2002 | return nullptr; | |||
2003 | } | |||
2004 | ||||
2005 | Expr *Result = cast_or_null<Expr>(InitExprs[Init]); | |||
2006 | setInit(Init, expr); | |||
2007 | return Result; | |||
2008 | } | |||
2009 | ||||
2010 | void InitListExpr::setArrayFiller(Expr *filler) { | |||
2011 | assert(!hasArrayFiller() && "Filler already set!")((!hasArrayFiller() && "Filler already set!") ? static_cast <void> (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2011, __PRETTY_FUNCTION__)); | |||
2012 | ArrayFillerOrUnionFieldInit = filler; | |||
2013 | // Fill out any "holes" in the array due to designated initializers. | |||
2014 | Expr **inits = getInits(); | |||
2015 | for (unsigned i = 0, e = getNumInits(); i != e; ++i) | |||
2016 | if (inits[i] == nullptr) | |||
2017 | inits[i] = filler; | |||
2018 | } | |||
2019 | ||||
2020 | bool InitListExpr::isStringLiteralInit() const { | |||
2021 | if (getNumInits() != 1) | |||
2022 | return false; | |||
2023 | const ArrayType *AT = getType()->getAsArrayTypeUnsafe(); | |||
2024 | if (!AT || !AT->getElementType()->isIntegerType()) | |||
2025 | return false; | |||
2026 | // It is possible for getInit() to return null. | |||
2027 | const Expr *Init = getInit(0); | |||
2028 | if (!Init) | |||
2029 | return false; | |||
2030 | Init = Init->IgnoreParens(); | |||
2031 | return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init); | |||
2032 | } | |||
2033 | ||||
2034 | bool InitListExpr::isTransparent() const { | |||
2035 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2035, __PRETTY_FUNCTION__)); | |||
2036 | ||||
2037 | // A glvalue InitListExpr is always just sugar. | |||
2038 | if (isGLValue()) { | |||
2039 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2039, __PRETTY_FUNCTION__)); | |||
2040 | return true; | |||
2041 | } | |||
2042 | ||||
2043 | // Otherwise, we're sugar if and only if we have exactly one initializer that | |||
2044 | // is of the same type. | |||
2045 | if (getNumInits() != 1 || !getInit(0)) | |||
2046 | return false; | |||
2047 | ||||
2048 | // Don't confuse aggregate initialization of a struct X { X &x; }; with a | |||
2049 | // transparent struct copy. | |||
2050 | if (!getInit(0)->isRValue() && getType()->isRecordType()) | |||
2051 | return false; | |||
2052 | ||||
2053 | return getType().getCanonicalType() == | |||
2054 | getInit(0)->getType().getCanonicalType(); | |||
2055 | } | |||
2056 | ||||
2057 | bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const { | |||
2058 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2058, __PRETTY_FUNCTION__)); | |||
2059 | ||||
2060 | if (LangOpts.CPlusPlus || getNumInits() != 1) { | |||
2061 | return false; | |||
2062 | } | |||
2063 | ||||
2064 | const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0)); | |||
2065 | return Lit && Lit->getValue() == 0; | |||
2066 | } | |||
2067 | ||||
2068 | SourceLocation InitListExpr::getBeginLoc() const { | |||
2069 | if (InitListExpr *SyntacticForm = getSyntacticForm()) | |||
2070 | return SyntacticForm->getBeginLoc(); | |||
2071 | SourceLocation Beg = LBraceLoc; | |||
2072 | if (Beg.isInvalid()) { | |||
2073 | // Find the first non-null initializer. | |||
2074 | for (InitExprsTy::const_iterator I = InitExprs.begin(), | |||
2075 | E = InitExprs.end(); | |||
2076 | I != E; ++I) { | |||
2077 | if (Stmt *S = *I) { | |||
2078 | Beg = S->getBeginLoc(); | |||
2079 | break; | |||
2080 | } | |||
2081 | } | |||
2082 | } | |||
2083 | return Beg; | |||
2084 | } | |||
2085 | ||||
2086 | SourceLocation InitListExpr::getEndLoc() const { | |||
2087 | if (InitListExpr *SyntacticForm = getSyntacticForm()) | |||
2088 | return SyntacticForm->getEndLoc(); | |||
2089 | SourceLocation End = RBraceLoc; | |||
2090 | if (End.isInvalid()) { | |||
2091 | // Find the first non-null initializer from the end. | |||
2092 | for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(), | |||
2093 | E = InitExprs.rend(); | |||
2094 | I != E; ++I) { | |||
2095 | if (Stmt *S = *I) { | |||
2096 | End = S->getEndLoc(); | |||
2097 | break; | |||
2098 | } | |||
2099 | } | |||
2100 | } | |||
2101 | return End; | |||
2102 | } | |||
2103 | ||||
2104 | /// getFunctionType - Return the underlying function type for this block. | |||
2105 | /// | |||
2106 | const FunctionProtoType *BlockExpr::getFunctionType() const { | |||
2107 | // The block pointer is never sugared, but the function type might be. | |||
2108 | return cast<BlockPointerType>(getType()) | |||
2109 | ->getPointeeType()->castAs<FunctionProtoType>(); | |||
2110 | } | |||
2111 | ||||
2112 | SourceLocation BlockExpr::getCaretLocation() const { | |||
2113 | return TheBlock->getCaretLocation(); | |||
2114 | } | |||
2115 | const Stmt *BlockExpr::getBody() const { | |||
2116 | return TheBlock->getBody(); | |||
2117 | } | |||
2118 | Stmt *BlockExpr::getBody() { | |||
2119 | return TheBlock->getBody(); | |||
2120 | } | |||
2121 | ||||
2122 | ||||
2123 | //===----------------------------------------------------------------------===// | |||
2124 | // Generic Expression Routines | |||
2125 | //===----------------------------------------------------------------------===// | |||
2126 | ||||
2127 | /// isUnusedResultAWarning - Return true if this immediate expression should | |||
2128 | /// be warned about if the result is unused. If so, fill in Loc and Ranges | |||
2129 | /// with location to warn on and the source range[s] to report with the | |||
2130 | /// warning. | |||
2131 | bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc, | |||
2132 | SourceRange &R1, SourceRange &R2, | |||
2133 | ASTContext &Ctx) const { | |||
2134 | // Don't warn if the expr is type dependent. The type could end up | |||
2135 | // instantiating to void. | |||
2136 | if (isTypeDependent()) | |||
2137 | return false; | |||
2138 | ||||
2139 | switch (getStmtClass()) { | |||
2140 | default: | |||
2141 | if (getType()->isVoidType()) | |||
2142 | return false; | |||
2143 | WarnE = this; | |||
2144 | Loc = getExprLoc(); | |||
2145 | R1 = getSourceRange(); | |||
2146 | return true; | |||
2147 | case ParenExprClass: | |||
2148 | return cast<ParenExpr>(this)->getSubExpr()-> | |||
2149 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2150 | case GenericSelectionExprClass: | |||
2151 | return cast<GenericSelectionExpr>(this)->getResultExpr()-> | |||
2152 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2153 | case CoawaitExprClass: | |||
2154 | case CoyieldExprClass: | |||
2155 | return cast<CoroutineSuspendExpr>(this)->getResumeExpr()-> | |||
2156 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2157 | case ChooseExprClass: | |||
2158 | return cast<ChooseExpr>(this)->getChosenSubExpr()-> | |||
2159 | isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2160 | case UnaryOperatorClass: { | |||
2161 | const UnaryOperator *UO = cast<UnaryOperator>(this); | |||
2162 | ||||
2163 | switch (UO->getOpcode()) { | |||
2164 | case UO_Plus: | |||
2165 | case UO_Minus: | |||
2166 | case UO_AddrOf: | |||
2167 | case UO_Not: | |||
2168 | case UO_LNot: | |||
2169 | case UO_Deref: | |||
2170 | break; | |||
2171 | case UO_Coawait: | |||
2172 | // This is just the 'operator co_await' call inside the guts of a | |||
2173 | // dependent co_await call. | |||
2174 | case UO_PostInc: | |||
2175 | case UO_PostDec: | |||
2176 | case UO_PreInc: | |||
2177 | case UO_PreDec: // ++/-- | |||
2178 | return false; // Not a warning. | |||
2179 | case UO_Real: | |||
2180 | case UO_Imag: | |||
2181 | // accessing a piece of a volatile complex is a side-effect. | |||
2182 | if (Ctx.getCanonicalType(UO->getSubExpr()->getType()) | |||
2183 | .isVolatileQualified()) | |||
2184 | return false; | |||
2185 | break; | |||
2186 | case UO_Extension: | |||
2187 | return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2188 | } | |||
2189 | WarnE = this; | |||
2190 | Loc = UO->getOperatorLoc(); | |||
2191 | R1 = UO->getSubExpr()->getSourceRange(); | |||
2192 | return true; | |||
2193 | } | |||
2194 | case BinaryOperatorClass: { | |||
2195 | const BinaryOperator *BO = cast<BinaryOperator>(this); | |||
2196 | switch (BO->getOpcode()) { | |||
2197 | default: | |||
2198 | break; | |||
2199 | // Consider the RHS of comma for side effects. LHS was checked by | |||
2200 | // Sema::CheckCommaOperands. | |||
2201 | case BO_Comma: | |||
2202 | // ((foo = <blah>), 0) is an idiom for hiding the result (and | |||
2203 | // lvalue-ness) of an assignment written in a macro. | |||
2204 | if (IntegerLiteral *IE = | |||
2205 | dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens())) | |||
2206 | if (IE->getValue() == 0) | |||
2207 | return false; | |||
2208 | return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2209 | // Consider '||', '&&' to have side effects if the LHS or RHS does. | |||
2210 | case BO_LAnd: | |||
2211 | case BO_LOr: | |||
2212 | if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) || | |||
2213 | !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) | |||
2214 | return false; | |||
2215 | break; | |||
2216 | } | |||
2217 | if (BO->isAssignmentOp()) | |||
2218 | return false; | |||
2219 | WarnE = this; | |||
2220 | Loc = BO->getOperatorLoc(); | |||
2221 | R1 = BO->getLHS()->getSourceRange(); | |||
2222 | R2 = BO->getRHS()->getSourceRange(); | |||
2223 | return true; | |||
2224 | } | |||
2225 | case CompoundAssignOperatorClass: | |||
2226 | case VAArgExprClass: | |||
2227 | case AtomicExprClass: | |||
2228 | return false; | |||
2229 | ||||
2230 | case ConditionalOperatorClass: { | |||
2231 | // If only one of the LHS or RHS is a warning, the operator might | |||
2232 | // be being used for control flow. Only warn if both the LHS and | |||
2233 | // RHS are warnings. | |||
2234 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); | |||
2235 | if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)) | |||
2236 | return false; | |||
2237 | if (!Exp->getLHS()) | |||
2238 | return true; | |||
2239 | return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2240 | } | |||
2241 | ||||
2242 | case MemberExprClass: | |||
2243 | WarnE = this; | |||
2244 | Loc = cast<MemberExpr>(this)->getMemberLoc(); | |||
2245 | R1 = SourceRange(Loc, Loc); | |||
2246 | R2 = cast<MemberExpr>(this)->getBase()->getSourceRange(); | |||
2247 | return true; | |||
2248 | ||||
2249 | case ArraySubscriptExprClass: | |||
2250 | WarnE = this; | |||
2251 | Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc(); | |||
2252 | R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange(); | |||
2253 | R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange(); | |||
2254 | return true; | |||
2255 | ||||
2256 | case CXXOperatorCallExprClass: { | |||
2257 | // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator | |||
2258 | // overloads as there is no reasonable way to define these such that they | |||
2259 | // have non-trivial, desirable side-effects. See the -Wunused-comparison | |||
2260 | // warning: operators == and != are commonly typo'ed, and so warning on them | |||
2261 | // provides additional value as well. If this list is updated, | |||
2262 | // DiagnoseUnusedComparison should be as well. | |||
2263 | const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this); | |||
2264 | switch (Op->getOperator()) { | |||
2265 | default: | |||
2266 | break; | |||
2267 | case OO_EqualEqual: | |||
2268 | case OO_ExclaimEqual: | |||
2269 | case OO_Less: | |||
2270 | case OO_Greater: | |||
2271 | case OO_GreaterEqual: | |||
2272 | case OO_LessEqual: | |||
2273 | if (Op->getCallReturnType(Ctx)->isReferenceType() || | |||
2274 | Op->getCallReturnType(Ctx)->isVoidType()) | |||
2275 | break; | |||
2276 | WarnE = this; | |||
2277 | Loc = Op->getOperatorLoc(); | |||
2278 | R1 = Op->getSourceRange(); | |||
2279 | return true; | |||
2280 | } | |||
2281 | ||||
2282 | // Fallthrough for generic call handling. | |||
2283 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
2284 | } | |||
2285 | case CallExprClass: | |||
2286 | case CXXMemberCallExprClass: | |||
2287 | case UserDefinedLiteralClass: { | |||
2288 | // If this is a direct call, get the callee. | |||
2289 | const CallExpr *CE = cast<CallExpr>(this); | |||
2290 | if (const Decl *FD = CE->getCalleeDecl()) { | |||
2291 | const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD); | |||
2292 | bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr() | |||
2293 | : FD->hasAttr<WarnUnusedResultAttr>(); | |||
2294 | ||||
2295 | // If the callee has attribute pure, const, or warn_unused_result, warn | |||
2296 | // about it. void foo() { strlen("bar"); } should warn. | |||
2297 | // | |||
2298 | // Note: If new cases are added here, DiagnoseUnusedExprResult should be | |||
2299 | // updated to match for QoI. | |||
2300 | if (HasWarnUnusedResultAttr || | |||
2301 | FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) { | |||
2302 | WarnE = this; | |||
2303 | Loc = CE->getCallee()->getBeginLoc(); | |||
2304 | R1 = CE->getCallee()->getSourceRange(); | |||
2305 | ||||
2306 | if (unsigned NumArgs = CE->getNumArgs()) | |||
2307 | R2 = SourceRange(CE->getArg(0)->getBeginLoc(), | |||
2308 | CE->getArg(NumArgs - 1)->getEndLoc()); | |||
2309 | return true; | |||
2310 | } | |||
2311 | } | |||
2312 | return false; | |||
2313 | } | |||
2314 | ||||
2315 | // If we don't know precisely what we're looking at, let's not warn. | |||
2316 | case UnresolvedLookupExprClass: | |||
2317 | case CXXUnresolvedConstructExprClass: | |||
2318 | return false; | |||
2319 | ||||
2320 | case CXXTemporaryObjectExprClass: | |||
2321 | case CXXConstructExprClass: { | |||
2322 | if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) { | |||
2323 | if (Type->hasAttr<WarnUnusedAttr>()) { | |||
2324 | WarnE = this; | |||
2325 | Loc = getBeginLoc(); | |||
2326 | R1 = getSourceRange(); | |||
2327 | return true; | |||
2328 | } | |||
2329 | } | |||
2330 | return false; | |||
2331 | } | |||
2332 | ||||
2333 | case ObjCMessageExprClass: { | |||
2334 | const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this); | |||
2335 | if (Ctx.getLangOpts().ObjCAutoRefCount && | |||
2336 | ME->isInstanceMessage() && | |||
2337 | !ME->getType()->isVoidType() && | |||
2338 | ME->getMethodFamily() == OMF_init) { | |||
2339 | WarnE = this; | |||
2340 | Loc = getExprLoc(); | |||
2341 | R1 = ME->getSourceRange(); | |||
2342 | return true; | |||
2343 | } | |||
2344 | ||||
2345 | if (const ObjCMethodDecl *MD = ME->getMethodDecl()) | |||
2346 | if (MD->hasAttr<WarnUnusedResultAttr>()) { | |||
2347 | WarnE = this; | |||
2348 | Loc = getExprLoc(); | |||
2349 | return true; | |||
2350 | } | |||
2351 | ||||
2352 | return false; | |||
2353 | } | |||
2354 | ||||
2355 | case ObjCPropertyRefExprClass: | |||
2356 | WarnE = this; | |||
2357 | Loc = getExprLoc(); | |||
2358 | R1 = getSourceRange(); | |||
2359 | return true; | |||
2360 | ||||
2361 | case PseudoObjectExprClass: { | |||
2362 | const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); | |||
2363 | ||||
2364 | // Only complain about things that have the form of a getter. | |||
2365 | if (isa<UnaryOperator>(PO->getSyntacticForm()) || | |||
2366 | isa<BinaryOperator>(PO->getSyntacticForm())) | |||
2367 | return false; | |||
2368 | ||||
2369 | WarnE = this; | |||
2370 | Loc = getExprLoc(); | |||
2371 | R1 = getSourceRange(); | |||
2372 | return true; | |||
2373 | } | |||
2374 | ||||
2375 | case StmtExprClass: { | |||
2376 | // Statement exprs don't logically have side effects themselves, but are | |||
2377 | // sometimes used in macros in ways that give them a type that is unused. | |||
2378 | // For example ({ blah; foo(); }) will end up with a type if foo has a type. | |||
2379 | // however, if the result of the stmt expr is dead, we don't want to emit a | |||
2380 | // warning. | |||
2381 | const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); | |||
2382 | if (!CS->body_empty()) { | |||
2383 | if (const Expr *E = dyn_cast<Expr>(CS->body_back())) | |||
2384 | return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2385 | if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back())) | |||
2386 | if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt())) | |||
2387 | return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2388 | } | |||
2389 | ||||
2390 | if (getType()->isVoidType()) | |||
2391 | return false; | |||
2392 | WarnE = this; | |||
2393 | Loc = cast<StmtExpr>(this)->getLParenLoc(); | |||
2394 | R1 = getSourceRange(); | |||
2395 | return true; | |||
2396 | } | |||
2397 | case CXXFunctionalCastExprClass: | |||
2398 | case CStyleCastExprClass: { | |||
2399 | // Ignore an explicit cast to void unless the operand is a non-trivial | |||
2400 | // volatile lvalue. | |||
2401 | const CastExpr *CE = cast<CastExpr>(this); | |||
2402 | if (CE->getCastKind() == CK_ToVoid) { | |||
2403 | if (CE->getSubExpr()->isGLValue() && | |||
2404 | CE->getSubExpr()->getType().isVolatileQualified()) { | |||
2405 | const DeclRefExpr *DRE = | |||
2406 | dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens()); | |||
2407 | if (!(DRE && isa<VarDecl>(DRE->getDecl()) && | |||
2408 | cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) && | |||
2409 | !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) { | |||
2410 | return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, | |||
2411 | R1, R2, Ctx); | |||
2412 | } | |||
2413 | } | |||
2414 | return false; | |||
2415 | } | |||
2416 | ||||
2417 | // If this is a cast to a constructor conversion, check the operand. | |||
2418 | // Otherwise, the result of the cast is unused. | |||
2419 | if (CE->getCastKind() == CK_ConstructorConversion) | |||
2420 | return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2421 | ||||
2422 | WarnE = this; | |||
2423 | if (const CXXFunctionalCastExpr *CXXCE = | |||
2424 | dyn_cast<CXXFunctionalCastExpr>(this)) { | |||
2425 | Loc = CXXCE->getBeginLoc(); | |||
2426 | R1 = CXXCE->getSubExpr()->getSourceRange(); | |||
2427 | } else { | |||
2428 | const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this); | |||
2429 | Loc = CStyleCE->getLParenLoc(); | |||
2430 | R1 = CStyleCE->getSubExpr()->getSourceRange(); | |||
2431 | } | |||
2432 | return true; | |||
2433 | } | |||
2434 | case ImplicitCastExprClass: { | |||
2435 | const CastExpr *ICE = cast<ImplicitCastExpr>(this); | |||
2436 | ||||
2437 | // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect. | |||
2438 | if (ICE->getCastKind() == CK_LValueToRValue && | |||
2439 | ICE->getSubExpr()->getType().isVolatileQualified()) | |||
2440 | return false; | |||
2441 | ||||
2442 | return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2443 | } | |||
2444 | case CXXDefaultArgExprClass: | |||
2445 | return (cast<CXXDefaultArgExpr>(this) | |||
2446 | ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); | |||
2447 | case CXXDefaultInitExprClass: | |||
2448 | return (cast<CXXDefaultInitExpr>(this) | |||
2449 | ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx)); | |||
2450 | ||||
2451 | case CXXNewExprClass: | |||
2452 | // FIXME: In theory, there might be new expressions that don't have side | |||
2453 | // effects (e.g. a placement new with an uninitialized POD). | |||
2454 | case CXXDeleteExprClass: | |||
2455 | return false; | |||
2456 | case MaterializeTemporaryExprClass: | |||
2457 | return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr() | |||
2458 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2459 | case CXXBindTemporaryExprClass: | |||
2460 | return cast<CXXBindTemporaryExpr>(this)->getSubExpr() | |||
2461 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2462 | case ExprWithCleanupsClass: | |||
2463 | return cast<ExprWithCleanups>(this)->getSubExpr() | |||
2464 | ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx); | |||
2465 | } | |||
2466 | } | |||
2467 | ||||
2468 | /// isOBJCGCCandidate - Check if an expression is objc gc'able. | |||
2469 | /// returns true, if it is; false otherwise. | |||
2470 | bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const { | |||
2471 | const Expr *E = IgnoreParens(); | |||
2472 | switch (E->getStmtClass()) { | |||
2473 | default: | |||
2474 | return false; | |||
2475 | case ObjCIvarRefExprClass: | |||
2476 | return true; | |||
2477 | case Expr::UnaryOperatorClass: | |||
2478 | return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2479 | case ImplicitCastExprClass: | |||
2480 | return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2481 | case MaterializeTemporaryExprClass: | |||
2482 | return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr() | |||
2483 | ->isOBJCGCCandidate(Ctx); | |||
2484 | case CStyleCastExprClass: | |||
2485 | return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx); | |||
2486 | case DeclRefExprClass: { | |||
2487 | const Decl *D = cast<DeclRefExpr>(E)->getDecl(); | |||
2488 | ||||
2489 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | |||
2490 | if (VD->hasGlobalStorage()) | |||
2491 | return true; | |||
2492 | QualType T = VD->getType(); | |||
2493 | // dereferencing to a pointer is always a gc'able candidate, | |||
2494 | // unless it is __weak. | |||
2495 | return T->isPointerType() && | |||
2496 | (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak); | |||
2497 | } | |||
2498 | return false; | |||
2499 | } | |||
2500 | case MemberExprClass: { | |||
2501 | const MemberExpr *M = cast<MemberExpr>(E); | |||
2502 | return M->getBase()->isOBJCGCCandidate(Ctx); | |||
2503 | } | |||
2504 | case ArraySubscriptExprClass: | |||
2505 | return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx); | |||
2506 | } | |||
2507 | } | |||
2508 | ||||
2509 | bool Expr::isBoundMemberFunction(ASTContext &Ctx) const { | |||
2510 | if (isTypeDependent()) | |||
2511 | return false; | |||
2512 | return ClassifyLValue(Ctx) == Expr::LV_MemberFunction; | |||
2513 | } | |||
2514 | ||||
2515 | QualType Expr::findBoundMemberType(const Expr *expr) { | |||
2516 | assert(expr->hasPlaceholderType(BuiltinType::BoundMember))((expr->hasPlaceholderType(BuiltinType::BoundMember)) ? static_cast <void> (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2516, __PRETTY_FUNCTION__)); | |||
2517 | ||||
2518 | // Bound member expressions are always one of these possibilities: | |||
2519 | // x->m x.m x->*y x.*y | |||
2520 | // (possibly parenthesized) | |||
2521 | ||||
2522 | expr = expr->IgnoreParens(); | |||
2523 | if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) { | |||
2524 | assert(isa<CXXMethodDecl>(mem->getMemberDecl()))((isa<CXXMethodDecl>(mem->getMemberDecl())) ? static_cast <void> (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2524, __PRETTY_FUNCTION__)); | |||
2525 | return mem->getMemberDecl()->getType(); | |||
2526 | } | |||
2527 | ||||
2528 | if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) { | |||
2529 | QualType type = op->getRHS()->getType()->castAs<MemberPointerType>() | |||
2530 | ->getPointeeType(); | |||
2531 | assert(type->isFunctionType())((type->isFunctionType()) ? static_cast<void> (0) : __assert_fail ("type->isFunctionType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2531, __PRETTY_FUNCTION__)); | |||
2532 | return type; | |||
2533 | } | |||
2534 | ||||
2535 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2535, __PRETTY_FUNCTION__)); | |||
2536 | return QualType(); | |||
2537 | } | |||
2538 | ||||
2539 | Expr* Expr::IgnoreParens() { | |||
2540 | Expr* E = this; | |||
2541 | while (true) { | |||
2542 | if (ParenExpr* P = dyn_cast<ParenExpr>(E)) { | |||
2543 | E = P->getSubExpr(); | |||
2544 | continue; | |||
2545 | } | |||
2546 | if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) { | |||
2547 | if (P->getOpcode() == UO_Extension) { | |||
2548 | E = P->getSubExpr(); | |||
2549 | continue; | |||
2550 | } | |||
2551 | } | |||
2552 | if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) { | |||
2553 | if (!P->isResultDependent()) { | |||
2554 | E = P->getResultExpr(); | |||
2555 | continue; | |||
2556 | } | |||
2557 | } | |||
2558 | if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) { | |||
2559 | if (!P->isConditionDependent()) { | |||
2560 | E = P->getChosenSubExpr(); | |||
2561 | continue; | |||
2562 | } | |||
2563 | } | |||
2564 | return E; | |||
2565 | } | |||
2566 | } | |||
2567 | ||||
2568 | /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr | |||
2569 | /// or CastExprs or ImplicitCastExprs, returning their operand. | |||
2570 | Expr *Expr::IgnoreParenCasts() { | |||
2571 | Expr *E = this; | |||
2572 | while (true) { | |||
2573 | E = E->IgnoreParens(); | |||
2574 | if (CastExpr *P = dyn_cast<CastExpr>(E)) { | |||
2575 | E = P->getSubExpr(); | |||
2576 | continue; | |||
2577 | } | |||
2578 | if (MaterializeTemporaryExpr *Materialize | |||
2579 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2580 | E = Materialize->GetTemporaryExpr(); | |||
2581 | continue; | |||
2582 | } | |||
2583 | if (SubstNonTypeTemplateParmExpr *NTTP | |||
2584 | = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { | |||
2585 | E = NTTP->getReplacement(); | |||
2586 | continue; | |||
2587 | } | |||
2588 | return E; | |||
2589 | } | |||
2590 | } | |||
2591 | ||||
2592 | Expr *Expr::IgnoreCasts() { | |||
2593 | Expr *E = this; | |||
2594 | while (true) { | |||
2595 | if (CastExpr *P = dyn_cast<CastExpr>(E)) { | |||
2596 | E = P->getSubExpr(); | |||
2597 | continue; | |||
2598 | } | |||
2599 | if (MaterializeTemporaryExpr *Materialize | |||
2600 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2601 | E = Materialize->GetTemporaryExpr(); | |||
2602 | continue; | |||
2603 | } | |||
2604 | if (SubstNonTypeTemplateParmExpr *NTTP | |||
2605 | = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { | |||
2606 | E = NTTP->getReplacement(); | |||
2607 | continue; | |||
2608 | } | |||
2609 | return E; | |||
2610 | } | |||
2611 | } | |||
2612 | ||||
2613 | /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue | |||
2614 | /// casts. This is intended purely as a temporary workaround for code | |||
2615 | /// that hasn't yet been rewritten to do the right thing about those | |||
2616 | /// casts, and may disappear along with the last internal use. | |||
2617 | Expr *Expr::IgnoreParenLValueCasts() { | |||
2618 | Expr *E = this; | |||
2619 | while (true) { | |||
2620 | E = E->IgnoreParens(); | |||
2621 | if (CastExpr *P = dyn_cast<CastExpr>(E)) { | |||
2622 | if (P->getCastKind() == CK_LValueToRValue) { | |||
2623 | E = P->getSubExpr(); | |||
2624 | continue; | |||
2625 | } | |||
2626 | } else if (MaterializeTemporaryExpr *Materialize | |||
2627 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2628 | E = Materialize->GetTemporaryExpr(); | |||
2629 | continue; | |||
2630 | } else if (SubstNonTypeTemplateParmExpr *NTTP | |||
2631 | = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { | |||
2632 | E = NTTP->getReplacement(); | |||
2633 | continue; | |||
2634 | } | |||
2635 | break; | |||
2636 | } | |||
2637 | return E; | |||
2638 | } | |||
2639 | ||||
2640 | Expr *Expr::ignoreParenBaseCasts() { | |||
2641 | Expr *E = this; | |||
2642 | while (true) { | |||
2643 | E = E->IgnoreParens(); | |||
2644 | if (CastExpr *CE = dyn_cast<CastExpr>(E)) { | |||
2645 | if (CE->getCastKind() == CK_DerivedToBase || | |||
2646 | CE->getCastKind() == CK_UncheckedDerivedToBase || | |||
2647 | CE->getCastKind() == CK_NoOp) { | |||
2648 | E = CE->getSubExpr(); | |||
2649 | continue; | |||
2650 | } | |||
2651 | } | |||
2652 | ||||
2653 | return E; | |||
2654 | } | |||
2655 | } | |||
2656 | ||||
2657 | Expr *Expr::IgnoreParenImpCasts() { | |||
2658 | Expr *E = this; | |||
2659 | while (true) { | |||
2660 | E = E->IgnoreParens(); | |||
2661 | if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) { | |||
2662 | E = P->getSubExpr(); | |||
2663 | continue; | |||
2664 | } | |||
2665 | if (MaterializeTemporaryExpr *Materialize | |||
2666 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2667 | E = Materialize->GetTemporaryExpr(); | |||
2668 | continue; | |||
2669 | } | |||
2670 | if (SubstNonTypeTemplateParmExpr *NTTP | |||
2671 | = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { | |||
2672 | E = NTTP->getReplacement(); | |||
2673 | continue; | |||
2674 | } | |||
2675 | return E; | |||
2676 | } | |||
2677 | } | |||
2678 | ||||
2679 | Expr *Expr::IgnoreConversionOperator() { | |||
2680 | if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) { | |||
2681 | if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl())) | |||
2682 | return MCE->getImplicitObjectArgument(); | |||
2683 | } | |||
2684 | return this; | |||
2685 | } | |||
2686 | ||||
2687 | /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the | |||
2688 | /// value (including ptr->int casts of the same size). Strip off any | |||
2689 | /// ParenExpr or CastExprs, returning their operand. | |||
2690 | Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) { | |||
2691 | Expr *E = this; | |||
2692 | while (true) { | |||
2693 | E = E->IgnoreParens(); | |||
2694 | ||||
2695 | if (CastExpr *P = dyn_cast<CastExpr>(E)) { | |||
2696 | // We ignore integer <-> casts that are of the same width, ptr<->ptr and | |||
2697 | // ptr<->int casts of the same width. We also ignore all identity casts. | |||
2698 | Expr *SE = P->getSubExpr(); | |||
2699 | ||||
2700 | if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) { | |||
2701 | E = SE; | |||
2702 | continue; | |||
2703 | } | |||
2704 | ||||
2705 | if ((E->getType()->isPointerType() || | |||
2706 | E->getType()->isIntegralType(Ctx)) && | |||
2707 | (SE->getType()->isPointerType() || | |||
2708 | SE->getType()->isIntegralType(Ctx)) && | |||
2709 | Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) { | |||
2710 | E = SE; | |||
2711 | continue; | |||
2712 | } | |||
2713 | } | |||
2714 | ||||
2715 | if (SubstNonTypeTemplateParmExpr *NTTP | |||
2716 | = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) { | |||
2717 | E = NTTP->getReplacement(); | |||
2718 | continue; | |||
2719 | } | |||
2720 | ||||
2721 | return E; | |||
2722 | } | |||
2723 | } | |||
2724 | ||||
2725 | bool Expr::isDefaultArgument() const { | |||
2726 | const Expr *E = this; | |||
2727 | if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2728 | E = M->GetTemporaryExpr(); | |||
2729 | ||||
2730 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) | |||
2731 | E = ICE->getSubExprAsWritten(); | |||
2732 | ||||
2733 | return isa<CXXDefaultArgExpr>(E); | |||
2734 | } | |||
2735 | ||||
2736 | /// Skip over any no-op casts and any temporary-binding | |||
2737 | /// expressions. | |||
2738 | static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) { | |||
2739 | if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E)) | |||
2740 | E = M->GetTemporaryExpr(); | |||
2741 | ||||
2742 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2743 | if (ICE->getCastKind() == CK_NoOp) | |||
2744 | E = ICE->getSubExpr(); | |||
2745 | else | |||
2746 | break; | |||
2747 | } | |||
2748 | ||||
2749 | while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E)) | |||
2750 | E = BE->getSubExpr(); | |||
2751 | ||||
2752 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2753 | if (ICE->getCastKind() == CK_NoOp) | |||
2754 | E = ICE->getSubExpr(); | |||
2755 | else | |||
2756 | break; | |||
2757 | } | |||
2758 | ||||
2759 | return E->IgnoreParens(); | |||
2760 | } | |||
2761 | ||||
2762 | /// isTemporaryObject - Determines if this expression produces a | |||
2763 | /// temporary of the given class type. | |||
2764 | bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const { | |||
2765 | if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy))) | |||
2766 | return false; | |||
2767 | ||||
2768 | const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this); | |||
2769 | ||||
2770 | // Temporaries are by definition pr-values of class type. | |||
2771 | if (!E->Classify(C).isPRValue()) { | |||
2772 | // In this context, property reference is a message call and is pr-value. | |||
2773 | if (!isa<ObjCPropertyRefExpr>(E)) | |||
2774 | return false; | |||
2775 | } | |||
2776 | ||||
2777 | // Black-list a few cases which yield pr-values of class type that don't | |||
2778 | // refer to temporaries of that type: | |||
2779 | ||||
2780 | // - implicit derived-to-base conversions | |||
2781 | if (isa<ImplicitCastExpr>(E)) { | |||
2782 | switch (cast<ImplicitCastExpr>(E)->getCastKind()) { | |||
2783 | case CK_DerivedToBase: | |||
2784 | case CK_UncheckedDerivedToBase: | |||
2785 | return false; | |||
2786 | default: | |||
2787 | break; | |||
2788 | } | |||
2789 | } | |||
2790 | ||||
2791 | // - member expressions (all) | |||
2792 | if (isa<MemberExpr>(E)) | |||
2793 | return false; | |||
2794 | ||||
2795 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) | |||
2796 | if (BO->isPtrMemOp()) | |||
2797 | return false; | |||
2798 | ||||
2799 | // - opaque values (all) | |||
2800 | if (isa<OpaqueValueExpr>(E)) | |||
2801 | return false; | |||
2802 | ||||
2803 | return true; | |||
2804 | } | |||
2805 | ||||
2806 | bool Expr::isImplicitCXXThis() const { | |||
2807 | const Expr *E = this; | |||
2808 | ||||
2809 | // Strip away parentheses and casts we don't care about. | |||
2810 | while (true) { | |||
2811 | if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) { | |||
2812 | E = Paren->getSubExpr(); | |||
2813 | continue; | |||
2814 | } | |||
2815 | ||||
2816 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
2817 | if (ICE->getCastKind() == CK_NoOp || | |||
2818 | ICE->getCastKind() == CK_LValueToRValue || | |||
2819 | ICE->getCastKind() == CK_DerivedToBase || | |||
2820 | ICE->getCastKind() == CK_UncheckedDerivedToBase) { | |||
2821 | E = ICE->getSubExpr(); | |||
2822 | continue; | |||
2823 | } | |||
2824 | } | |||
2825 | ||||
2826 | if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) { | |||
2827 | if (UnOp->getOpcode() == UO_Extension) { | |||
2828 | E = UnOp->getSubExpr(); | |||
2829 | continue; | |||
2830 | } | |||
2831 | } | |||
2832 | ||||
2833 | if (const MaterializeTemporaryExpr *M | |||
2834 | = dyn_cast<MaterializeTemporaryExpr>(E)) { | |||
2835 | E = M->GetTemporaryExpr(); | |||
2836 | continue; | |||
2837 | } | |||
2838 | ||||
2839 | break; | |||
2840 | } | |||
2841 | ||||
2842 | if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E)) | |||
2843 | return This->isImplicit(); | |||
2844 | ||||
2845 | return false; | |||
2846 | } | |||
2847 | ||||
2848 | /// hasAnyTypeDependentArguments - Determines if any of the expressions | |||
2849 | /// in Exprs is type-dependent. | |||
2850 | bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) { | |||
2851 | for (unsigned I = 0; I < Exprs.size(); ++I) | |||
2852 | if (Exprs[I]->isTypeDependent()) | |||
2853 | return true; | |||
2854 | ||||
2855 | return false; | |||
2856 | } | |||
2857 | ||||
2858 | bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef, | |||
2859 | const Expr **Culprit) const { | |||
2860 | // This function is attempting whether an expression is an initializer | |||
2861 | // which can be evaluated at compile-time. It very closely parallels | |||
2862 | // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it | |||
2863 | // will lead to unexpected results. Like ConstExprEmitter, it falls back | |||
2864 | // to isEvaluatable most of the time. | |||
2865 | // | |||
2866 | // If we ever capture reference-binding directly in the AST, we can | |||
2867 | // kill the second parameter. | |||
2868 | ||||
2869 | if (IsForRef) { | |||
2870 | EvalResult Result; | |||
2871 | if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects) | |||
2872 | return true; | |||
2873 | if (Culprit) | |||
2874 | *Culprit = this; | |||
2875 | return false; | |||
2876 | } | |||
2877 | ||||
2878 | switch (getStmtClass()) { | |||
2879 | default: break; | |||
2880 | case StringLiteralClass: | |||
2881 | case ObjCEncodeExprClass: | |||
2882 | return true; | |||
2883 | case CXXTemporaryObjectExprClass: | |||
2884 | case CXXConstructExprClass: { | |||
2885 | const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); | |||
2886 | ||||
2887 | if (CE->getConstructor()->isTrivial() && | |||
2888 | CE->getConstructor()->getParent()->hasTrivialDestructor()) { | |||
2889 | // Trivial default constructor | |||
2890 | if (!CE->getNumArgs()) return true; | |||
2891 | ||||
2892 | // Trivial copy constructor | |||
2893 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 2893, __PRETTY_FUNCTION__)); | |||
2894 | return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit); | |||
2895 | } | |||
2896 | ||||
2897 | break; | |||
2898 | } | |||
2899 | case CompoundLiteralExprClass: { | |||
2900 | // This handles gcc's extension that allows global initializers like | |||
2901 | // "struct x {int x;} x = (struct x) {};". | |||
2902 | // FIXME: This accepts other cases it shouldn't! | |||
2903 | const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer(); | |||
2904 | return Exp->isConstantInitializer(Ctx, false, Culprit); | |||
2905 | } | |||
2906 | case DesignatedInitUpdateExprClass: { | |||
2907 | const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this); | |||
2908 | return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) && | |||
2909 | DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit); | |||
2910 | } | |||
2911 | case InitListExprClass: { | |||
2912 | const InitListExpr *ILE = cast<InitListExpr>(this); | |||
2913 | if (ILE->getType()->isArrayType()) { | |||
2914 | unsigned numInits = ILE->getNumInits(); | |||
2915 | for (unsigned i = 0; i < numInits; i++) { | |||
2916 | if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit)) | |||
2917 | return false; | |||
2918 | } | |||
2919 | return true; | |||
2920 | } | |||
2921 | ||||
2922 | if (ILE->getType()->isRecordType()) { | |||
2923 | unsigned ElementNo = 0; | |||
2924 | RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl(); | |||
2925 | for (const auto *Field : RD->fields()) { | |||
2926 | // If this is a union, skip all the fields that aren't being initialized. | |||
2927 | if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field) | |||
2928 | continue; | |||
2929 | ||||
2930 | // Don't emit anonymous bitfields, they just affect layout. | |||
2931 | if (Field->isUnnamedBitfield()) | |||
2932 | continue; | |||
2933 | ||||
2934 | if (ElementNo < ILE->getNumInits()) { | |||
2935 | const Expr *Elt = ILE->getInit(ElementNo++); | |||
2936 | if (Field->isBitField()) { | |||
2937 | // Bitfields have to evaluate to an integer. | |||
2938 | llvm::APSInt ResultTmp; | |||
2939 | if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) { | |||
2940 | if (Culprit) | |||
2941 | *Culprit = Elt; | |||
2942 | return false; | |||
2943 | } | |||
2944 | } else { | |||
2945 | bool RefType = Field->getType()->isReferenceType(); | |||
2946 | if (!Elt->isConstantInitializer(Ctx, RefType, Culprit)) | |||
2947 | return false; | |||
2948 | } | |||
2949 | } | |||
2950 | } | |||
2951 | return true; | |||
2952 | } | |||
2953 | ||||
2954 | break; | |||
2955 | } | |||
2956 | case ImplicitValueInitExprClass: | |||
2957 | case NoInitExprClass: | |||
2958 | return true; | |||
2959 | case ParenExprClass: | |||
2960 | return cast<ParenExpr>(this)->getSubExpr() | |||
2961 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
2962 | case GenericSelectionExprClass: | |||
2963 | return cast<GenericSelectionExpr>(this)->getResultExpr() | |||
2964 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
2965 | case ChooseExprClass: | |||
2966 | if (cast<ChooseExpr>(this)->isConditionDependent()) { | |||
2967 | if (Culprit) | |||
2968 | *Culprit = this; | |||
2969 | return false; | |||
2970 | } | |||
2971 | return cast<ChooseExpr>(this)->getChosenSubExpr() | |||
2972 | ->isConstantInitializer(Ctx, IsForRef, Culprit); | |||
2973 | case UnaryOperatorClass: { | |||
2974 | const UnaryOperator* Exp = cast<UnaryOperator>(this); | |||
2975 | if (Exp->getOpcode() == UO_Extension) | |||
2976 | return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit); | |||
2977 | break; | |||
2978 | } | |||
2979 | case CXXFunctionalCastExprClass: | |||
2980 | case CXXStaticCastExprClass: | |||
2981 | case ImplicitCastExprClass: | |||
2982 | case CStyleCastExprClass: | |||
2983 | case ObjCBridgedCastExprClass: | |||
2984 | case CXXDynamicCastExprClass: | |||
2985 | case CXXReinterpretCastExprClass: | |||
2986 | case CXXConstCastExprClass: { | |||
2987 | const CastExpr *CE = cast<CastExpr>(this); | |||
2988 | ||||
2989 | // Handle misc casts we want to ignore. | |||
2990 | if (CE->getCastKind() == CK_NoOp || | |||
2991 | CE->getCastKind() == CK_LValueToRValue || | |||
2992 | CE->getCastKind() == CK_ToUnion || | |||
2993 | CE->getCastKind() == CK_ConstructorConversion || | |||
2994 | CE->getCastKind() == CK_NonAtomicToAtomic || | |||
2995 | CE->getCastKind() == CK_AtomicToNonAtomic || | |||
2996 | CE->getCastKind() == CK_IntToOCLSampler) | |||
2997 | return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit); | |||
2998 | ||||
2999 | break; | |||
3000 | } | |||
3001 | case MaterializeTemporaryExprClass: | |||
3002 | return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr() | |||
3003 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3004 | ||||
3005 | case SubstNonTypeTemplateParmExprClass: | |||
3006 | return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement() | |||
3007 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3008 | case CXXDefaultArgExprClass: | |||
3009 | return cast<CXXDefaultArgExpr>(this)->getExpr() | |||
3010 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3011 | case CXXDefaultInitExprClass: | |||
3012 | return cast<CXXDefaultInitExpr>(this)->getExpr() | |||
3013 | ->isConstantInitializer(Ctx, false, Culprit); | |||
3014 | } | |||
3015 | // Allow certain forms of UB in constant initializers: signed integer | |||
3016 | // overflow and floating-point division by zero. We'll give a warning on | |||
3017 | // these, but they're common enough that we have to accept them. | |||
3018 | if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior)) | |||
3019 | return true; | |||
3020 | if (Culprit) | |||
3021 | *Culprit = this; | |||
3022 | return false; | |||
3023 | } | |||
3024 | ||||
3025 | bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const { | |||
3026 | const FunctionDecl* FD = getDirectCallee(); | |||
3027 | if (!FD || (FD->getBuiltinID() != Builtin::BI__assume && | |||
3028 | FD->getBuiltinID() != Builtin::BI__builtin_assume)) | |||
3029 | return false; | |||
3030 | ||||
3031 | const Expr* Arg = getArg(0); | |||
3032 | bool ArgVal; | |||
3033 | return !Arg->isValueDependent() && | |||
3034 | Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal; | |||
3035 | } | |||
3036 | ||||
3037 | namespace { | |||
3038 | /// Look for any side effects within a Stmt. | |||
3039 | class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> { | |||
3040 | typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited; | |||
3041 | const bool IncludePossibleEffects; | |||
3042 | bool HasSideEffects; | |||
3043 | ||||
3044 | public: | |||
3045 | explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible) | |||
3046 | : Inherited(Context), | |||
3047 | IncludePossibleEffects(IncludePossible), HasSideEffects(false) { } | |||
3048 | ||||
3049 | bool hasSideEffects() const { return HasSideEffects; } | |||
3050 | ||||
3051 | void VisitExpr(const Expr *E) { | |||
3052 | if (!HasSideEffects && | |||
3053 | E->HasSideEffects(Context, IncludePossibleEffects)) | |||
3054 | HasSideEffects = true; | |||
3055 | } | |||
3056 | }; | |||
3057 | } | |||
3058 | ||||
3059 | bool Expr::HasSideEffects(const ASTContext &Ctx, | |||
3060 | bool IncludePossibleEffects) const { | |||
3061 | // In circumstances where we care about definite side effects instead of | |||
3062 | // potential side effects, we want to ignore expressions that are part of a | |||
3063 | // macro expansion as a potential side effect. | |||
3064 | if (!IncludePossibleEffects && getExprLoc().isMacroID()) | |||
3065 | return false; | |||
3066 | ||||
3067 | if (isInstantiationDependent()) | |||
3068 | return IncludePossibleEffects; | |||
3069 | ||||
3070 | switch (getStmtClass()) { | |||
3071 | case NoStmtClass: | |||
3072 | #define ABSTRACT_STMT(Type) | |||
3073 | #define STMT(Type, Base) case Type##Class: | |||
3074 | #define EXPR(Type, Base) | |||
3075 | #include "clang/AST/StmtNodes.inc" | |||
3076 | llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3076); | |||
3077 | ||||
3078 | case DependentScopeDeclRefExprClass: | |||
3079 | case CXXUnresolvedConstructExprClass: | |||
3080 | case CXXDependentScopeMemberExprClass: | |||
3081 | case UnresolvedLookupExprClass: | |||
3082 | case UnresolvedMemberExprClass: | |||
3083 | case PackExpansionExprClass: | |||
3084 | case SubstNonTypeTemplateParmPackExprClass: | |||
3085 | case FunctionParmPackExprClass: | |||
3086 | case TypoExprClass: | |||
3087 | case CXXFoldExprClass: | |||
3088 | llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3088); | |||
3089 | ||||
3090 | case DeclRefExprClass: | |||
3091 | case ObjCIvarRefExprClass: | |||
3092 | case PredefinedExprClass: | |||
3093 | case IntegerLiteralClass: | |||
3094 | case FixedPointLiteralClass: | |||
3095 | case FloatingLiteralClass: | |||
3096 | case ImaginaryLiteralClass: | |||
3097 | case StringLiteralClass: | |||
3098 | case CharacterLiteralClass: | |||
3099 | case OffsetOfExprClass: | |||
3100 | case ImplicitValueInitExprClass: | |||
3101 | case UnaryExprOrTypeTraitExprClass: | |||
3102 | case AddrLabelExprClass: | |||
3103 | case GNUNullExprClass: | |||
3104 | case ArrayInitIndexExprClass: | |||
3105 | case NoInitExprClass: | |||
3106 | case CXXBoolLiteralExprClass: | |||
3107 | case CXXNullPtrLiteralExprClass: | |||
3108 | case CXXThisExprClass: | |||
3109 | case CXXScalarValueInitExprClass: | |||
3110 | case TypeTraitExprClass: | |||
3111 | case ArrayTypeTraitExprClass: | |||
3112 | case ExpressionTraitExprClass: | |||
3113 | case CXXNoexceptExprClass: | |||
3114 | case SizeOfPackExprClass: | |||
3115 | case ObjCStringLiteralClass: | |||
3116 | case ObjCEncodeExprClass: | |||
3117 | case ObjCBoolLiteralExprClass: | |||
3118 | case ObjCAvailabilityCheckExprClass: | |||
3119 | case CXXUuidofExprClass: | |||
3120 | case OpaqueValueExprClass: | |||
3121 | // These never have a side-effect. | |||
3122 | return false; | |||
3123 | ||||
3124 | case CallExprClass: | |||
3125 | case CXXOperatorCallExprClass: | |||
3126 | case CXXMemberCallExprClass: | |||
3127 | case CUDAKernelCallExprClass: | |||
3128 | case UserDefinedLiteralClass: { | |||
3129 | // We don't know a call definitely has side effects, except for calls | |||
3130 | // to pure/const functions that definitely don't. | |||
3131 | // If the call itself is considered side-effect free, check the operands. | |||
3132 | const Decl *FD = cast<CallExpr>(this)->getCalleeDecl(); | |||
3133 | bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>()); | |||
3134 | if (IsPure || !IncludePossibleEffects) | |||
3135 | break; | |||
3136 | return true; | |||
3137 | } | |||
3138 | ||||
3139 | case BlockExprClass: | |||
3140 | case CXXBindTemporaryExprClass: | |||
3141 | if (!IncludePossibleEffects) | |||
3142 | break; | |||
3143 | return true; | |||
3144 | ||||
3145 | case MSPropertyRefExprClass: | |||
3146 | case MSPropertySubscriptExprClass: | |||
3147 | case CompoundAssignOperatorClass: | |||
3148 | case VAArgExprClass: | |||
3149 | case AtomicExprClass: | |||
3150 | case CXXThrowExprClass: | |||
3151 | case CXXNewExprClass: | |||
3152 | case CXXDeleteExprClass: | |||
3153 | case CoawaitExprClass: | |||
3154 | case DependentCoawaitExprClass: | |||
3155 | case CoyieldExprClass: | |||
3156 | // These always have a side-effect. | |||
3157 | return true; | |||
3158 | ||||
3159 | case StmtExprClass: { | |||
3160 | // StmtExprs have a side-effect if any substatement does. | |||
3161 | SideEffectFinder Finder(Ctx, IncludePossibleEffects); | |||
3162 | Finder.Visit(cast<StmtExpr>(this)->getSubStmt()); | |||
3163 | return Finder.hasSideEffects(); | |||
3164 | } | |||
3165 | ||||
3166 | case ExprWithCleanupsClass: | |||
3167 | if (IncludePossibleEffects) | |||
3168 | if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects()) | |||
3169 | return true; | |||
3170 | break; | |||
3171 | ||||
3172 | case ParenExprClass: | |||
3173 | case ArraySubscriptExprClass: | |||
3174 | case OMPArraySectionExprClass: | |||
3175 | case MemberExprClass: | |||
3176 | case ConditionalOperatorClass: | |||
3177 | case BinaryConditionalOperatorClass: | |||
3178 | case CompoundLiteralExprClass: | |||
3179 | case ExtVectorElementExprClass: | |||
3180 | case DesignatedInitExprClass: | |||
3181 | case DesignatedInitUpdateExprClass: | |||
3182 | case ArrayInitLoopExprClass: | |||
3183 | case ParenListExprClass: | |||
3184 | case CXXPseudoDestructorExprClass: | |||
3185 | case CXXStdInitializerListExprClass: | |||
3186 | case SubstNonTypeTemplateParmExprClass: | |||
3187 | case MaterializeTemporaryExprClass: | |||
3188 | case ShuffleVectorExprClass: | |||
3189 | case ConvertVectorExprClass: | |||
3190 | case AsTypeExprClass: | |||
3191 | // These have a side-effect if any subexpression does. | |||
3192 | break; | |||
3193 | ||||
3194 | case UnaryOperatorClass: | |||
3195 | if (cast<UnaryOperator>(this)->isIncrementDecrementOp()) | |||
3196 | return true; | |||
3197 | break; | |||
3198 | ||||
3199 | case BinaryOperatorClass: | |||
3200 | if (cast<BinaryOperator>(this)->isAssignmentOp()) | |||
3201 | return true; | |||
3202 | break; | |||
3203 | ||||
3204 | case InitListExprClass: | |||
3205 | // FIXME: The children for an InitListExpr doesn't include the array filler. | |||
3206 | if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller()) | |||
3207 | if (E->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3208 | return true; | |||
3209 | break; | |||
3210 | ||||
3211 | case GenericSelectionExprClass: | |||
3212 | return cast<GenericSelectionExpr>(this)->getResultExpr()-> | |||
3213 | HasSideEffects(Ctx, IncludePossibleEffects); | |||
3214 | ||||
3215 | case ChooseExprClass: | |||
3216 | return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects( | |||
3217 | Ctx, IncludePossibleEffects); | |||
3218 | ||||
3219 | case CXXDefaultArgExprClass: | |||
3220 | return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects( | |||
3221 | Ctx, IncludePossibleEffects); | |||
3222 | ||||
3223 | case CXXDefaultInitExprClass: { | |||
3224 | const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField(); | |||
3225 | if (const Expr *E = FD->getInClassInitializer()) | |||
3226 | return E->HasSideEffects(Ctx, IncludePossibleEffects); | |||
3227 | // If we've not yet parsed the initializer, assume it has side-effects. | |||
3228 | return true; | |||
3229 | } | |||
3230 | ||||
3231 | case CXXDynamicCastExprClass: { | |||
3232 | // A dynamic_cast expression has side-effects if it can throw. | |||
3233 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this); | |||
3234 | if (DCE->getTypeAsWritten()->isReferenceType() && | |||
3235 | DCE->getCastKind() == CK_Dynamic) | |||
3236 | return true; | |||
3237 | } | |||
3238 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
3239 | case ImplicitCastExprClass: | |||
3240 | case CStyleCastExprClass: | |||
3241 | case CXXStaticCastExprClass: | |||
3242 | case CXXReinterpretCastExprClass: | |||
3243 | case CXXConstCastExprClass: | |||
3244 | case CXXFunctionalCastExprClass: { | |||
3245 | // While volatile reads are side-effecting in both C and C++, we treat them | |||
3246 | // as having possible (not definite) side-effects. This allows idiomatic | |||
3247 | // code to behave without warning, such as sizeof(*v) for a volatile- | |||
3248 | // qualified pointer. | |||
3249 | if (!IncludePossibleEffects) | |||
3250 | break; | |||
3251 | ||||
3252 | const CastExpr *CE = cast<CastExpr>(this); | |||
3253 | if (CE->getCastKind() == CK_LValueToRValue && | |||
3254 | CE->getSubExpr()->getType().isVolatileQualified()) | |||
3255 | return true; | |||
3256 | break; | |||
3257 | } | |||
3258 | ||||
3259 | case CXXTypeidExprClass: | |||
3260 | // typeid might throw if its subexpression is potentially-evaluated, so has | |||
3261 | // side-effects in that case whether or not its subexpression does. | |||
3262 | return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated(); | |||
3263 | ||||
3264 | case CXXConstructExprClass: | |||
3265 | case CXXTemporaryObjectExprClass: { | |||
3266 | const CXXConstructExpr *CE = cast<CXXConstructExpr>(this); | |||
3267 | if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects) | |||
3268 | return true; | |||
3269 | // A trivial constructor does not add any side-effects of its own. Just look | |||
3270 | // at its arguments. | |||
3271 | break; | |||
3272 | } | |||
3273 | ||||
3274 | case CXXInheritedCtorInitExprClass: { | |||
3275 | const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this); | |||
3276 | if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects) | |||
3277 | return true; | |||
3278 | break; | |||
3279 | } | |||
3280 | ||||
3281 | case LambdaExprClass: { | |||
3282 | const LambdaExpr *LE = cast<LambdaExpr>(this); | |||
3283 | for (Expr *E : LE->capture_inits()) | |||
3284 | if (E->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3285 | return true; | |||
3286 | return false; | |||
3287 | } | |||
3288 | ||||
3289 | case PseudoObjectExprClass: { | |||
3290 | // Only look for side-effects in the semantic form, and look past | |||
3291 | // OpaqueValueExpr bindings in that form. | |||
3292 | const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this); | |||
3293 | for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(), | |||
3294 | E = PO->semantics_end(); | |||
3295 | I != E; ++I) { | |||
3296 | const Expr *Subexpr = *I; | |||
3297 | if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr)) | |||
3298 | Subexpr = OVE->getSourceExpr(); | |||
3299 | if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3300 | return true; | |||
3301 | } | |||
3302 | return false; | |||
3303 | } | |||
3304 | ||||
3305 | case ObjCBoxedExprClass: | |||
3306 | case ObjCArrayLiteralClass: | |||
3307 | case ObjCDictionaryLiteralClass: | |||
3308 | case ObjCSelectorExprClass: | |||
3309 | case ObjCProtocolExprClass: | |||
3310 | case ObjCIsaExprClass: | |||
3311 | case ObjCIndirectCopyRestoreExprClass: | |||
3312 | case ObjCSubscriptRefExprClass: | |||
3313 | case ObjCBridgedCastExprClass: | |||
3314 | case ObjCMessageExprClass: | |||
3315 | case ObjCPropertyRefExprClass: | |||
3316 | // FIXME: Classify these cases better. | |||
3317 | if (IncludePossibleEffects) | |||
3318 | return true; | |||
3319 | break; | |||
3320 | } | |||
3321 | ||||
3322 | // Recurse to children. | |||
3323 | for (const Stmt *SubStmt : children()) | |||
3324 | if (SubStmt && | |||
3325 | cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects)) | |||
3326 | return true; | |||
3327 | ||||
3328 | return false; | |||
3329 | } | |||
3330 | ||||
3331 | namespace { | |||
3332 | /// Look for a call to a non-trivial function within an expression. | |||
3333 | class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder> | |||
3334 | { | |||
3335 | typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited; | |||
3336 | ||||
3337 | bool NonTrivial; | |||
3338 | ||||
3339 | public: | |||
3340 | explicit NonTrivialCallFinder(const ASTContext &Context) | |||
3341 | : Inherited(Context), NonTrivial(false) { } | |||
3342 | ||||
3343 | bool hasNonTrivialCall() const { return NonTrivial; } | |||
3344 | ||||
3345 | void VisitCallExpr(const CallExpr *E) { | |||
3346 | if (const CXXMethodDecl *Method | |||
3347 | = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) { | |||
3348 | if (Method->isTrivial()) { | |||
3349 | // Recurse to children of the call. | |||
3350 | Inherited::VisitStmt(E); | |||
3351 | return; | |||
3352 | } | |||
3353 | } | |||
3354 | ||||
3355 | NonTrivial = true; | |||
3356 | } | |||
3357 | ||||
3358 | void VisitCXXConstructExpr(const CXXConstructExpr *E) { | |||
3359 | if (E->getConstructor()->isTrivial()) { | |||
3360 | // Recurse to children of the call. | |||
3361 | Inherited::VisitStmt(E); | |||
3362 | return; | |||
3363 | } | |||
3364 | ||||
3365 | NonTrivial = true; | |||
3366 | } | |||
3367 | ||||
3368 | void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) { | |||
3369 | if (E->getTemporary()->getDestructor()->isTrivial()) { | |||
3370 | Inherited::VisitStmt(E); | |||
3371 | return; | |||
3372 | } | |||
3373 | ||||
3374 | NonTrivial = true; | |||
3375 | } | |||
3376 | }; | |||
3377 | } | |||
3378 | ||||
3379 | bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const { | |||
3380 | NonTrivialCallFinder Finder(Ctx); | |||
3381 | Finder.Visit(this); | |||
3382 | return Finder.hasNonTrivialCall(); | |||
3383 | } | |||
3384 | ||||
3385 | /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null | |||
3386 | /// pointer constant or not, as well as the specific kind of constant detected. | |||
3387 | /// Null pointer constants can be integer constant expressions with the | |||
3388 | /// value zero, casts of zero to void*, nullptr (C++0X), or __null | |||
3389 | /// (a GNU extension). | |||
3390 | Expr::NullPointerConstantKind | |||
3391 | Expr::isNullPointerConstant(ASTContext &Ctx, | |||
3392 | NullPointerConstantValueDependence NPC) const { | |||
3393 | if (isValueDependent() && | |||
3394 | (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) { | |||
3395 | switch (NPC) { | |||
3396 | case NPC_NeverValueDependent: | |||
3397 | llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3397); | |||
3398 | case NPC_ValueDependentIsNull: | |||
3399 | if (isTypeDependent() || getType()->isIntegralType(Ctx)) | |||
3400 | return NPCK_ZeroExpression; | |||
3401 | else | |||
3402 | return NPCK_NotNull; | |||
3403 | ||||
3404 | case NPC_ValueDependentIsNotNull: | |||
3405 | return NPCK_NotNull; | |||
3406 | } | |||
3407 | } | |||
3408 | ||||
3409 | // Strip off a cast to void*, if it exists. Except in C++. | |||
3410 | if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { | |||
3411 | if (!Ctx.getLangOpts().CPlusPlus) { | |||
3412 | // Check that it is a cast to void*. | |||
3413 | if (const PointerType *PT = CE->getType()->getAs<PointerType>()) { | |||
3414 | QualType Pointee = PT->getPointeeType(); | |||
3415 | // Only (void*)0 or equivalent are treated as nullptr. If pointee type | |||
3416 | // has non-default address space it is not treated as nullptr. | |||
3417 | // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr | |||
3418 | // since it cannot be assigned to a pointer to constant address space. | |||
3419 | bool PointeeHasDefaultAS = | |||
3420 | Pointee.getAddressSpace() == LangAS::Default || | |||
3421 | (Ctx.getLangOpts().OpenCLVersion >= 200 && | |||
3422 | Pointee.getAddressSpace() == LangAS::opencl_generic) || | |||
3423 | (Ctx.getLangOpts().OpenCL && | |||
3424 | Ctx.getLangOpts().OpenCLVersion < 200 && | |||
3425 | Pointee.getAddressSpace() == LangAS::opencl_private); | |||
3426 | ||||
3427 | if (PointeeHasDefaultAS && Pointee->isVoidType() && // to void* | |||
3428 | CE->getSubExpr()->getType()->isIntegerType()) // from int. | |||
3429 | return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3430 | } | |||
3431 | } | |||
3432 | } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { | |||
3433 | // Ignore the ImplicitCastExpr type entirely. | |||
3434 | return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3435 | } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { | |||
3436 | // Accept ((void*)0) as a null pointer constant, as many other | |||
3437 | // implementations do. | |||
3438 | return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3439 | } else if (const GenericSelectionExpr *GE = | |||
3440 | dyn_cast<GenericSelectionExpr>(this)) { | |||
3441 | if (GE->isResultDependent()) | |||
3442 | return NPCK_NotNull; | |||
3443 | return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC); | |||
3444 | } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) { | |||
3445 | if (CE->isConditionDependent()) | |||
3446 | return NPCK_NotNull; | |||
3447 | return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC); | |||
3448 | } else if (const CXXDefaultArgExpr *DefaultArg | |||
3449 | = dyn_cast<CXXDefaultArgExpr>(this)) { | |||
3450 | // See through default argument expressions. | |||
3451 | return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC); | |||
3452 | } else if (const CXXDefaultInitExpr *DefaultInit | |||
3453 | = dyn_cast<CXXDefaultInitExpr>(this)) { | |||
3454 | // See through default initializer expressions. | |||
3455 | return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC); | |||
3456 | } else if (isa<GNUNullExpr>(this)) { | |||
3457 | // The GNU __null extension is always a null pointer constant. | |||
3458 | return NPCK_GNUNull; | |||
3459 | } else if (const MaterializeTemporaryExpr *M | |||
3460 | = dyn_cast<MaterializeTemporaryExpr>(this)) { | |||
3461 | return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC); | |||
3462 | } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) { | |||
3463 | if (const Expr *Source = OVE->getSourceExpr()) | |||
3464 | return Source->isNullPointerConstant(Ctx, NPC); | |||
3465 | } | |||
3466 | ||||
3467 | // C++11 nullptr_t is always a null pointer constant. | |||
3468 | if (getType()->isNullPtrType()) | |||
3469 | return NPCK_CXX11_nullptr; | |||
3470 | ||||
3471 | if (const RecordType *UT = getType()->getAsUnionType()) | |||
3472 | if (!Ctx.getLangOpts().CPlusPlus11 && | |||
3473 | UT && UT->getDecl()->hasAttr<TransparentUnionAttr>()) | |||
3474 | if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){ | |||
3475 | const Expr *InitExpr = CLE->getInitializer(); | |||
3476 | if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr)) | |||
3477 | return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC); | |||
3478 | } | |||
3479 | // This expression must be an integer type. | |||
3480 | if (!getType()->isIntegerType() || | |||
3481 | (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType())) | |||
3482 | return NPCK_NotNull; | |||
3483 | ||||
3484 | if (Ctx.getLangOpts().CPlusPlus11) { | |||
3485 | // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with | |||
3486 | // value zero or a prvalue of type std::nullptr_t. | |||
3487 | // Microsoft mode permits C++98 rules reflecting MSVC behavior. | |||
3488 | const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this); | |||
3489 | if (Lit && !Lit->getValue()) | |||
3490 | return NPCK_ZeroLiteral; | |||
3491 | else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx)) | |||
3492 | return NPCK_NotNull; | |||
3493 | } else { | |||
3494 | // If we have an integer constant expression, we need to *evaluate* it and | |||
3495 | // test for the value 0. | |||
3496 | if (!isIntegerConstantExpr(Ctx)) | |||
3497 | return NPCK_NotNull; | |||
3498 | } | |||
3499 | ||||
3500 | if (EvaluateKnownConstInt(Ctx) != 0) | |||
3501 | return NPCK_NotNull; | |||
3502 | ||||
3503 | if (isa<IntegerLiteral>(this)) | |||
3504 | return NPCK_ZeroLiteral; | |||
3505 | return NPCK_ZeroExpression; | |||
3506 | } | |||
3507 | ||||
3508 | /// If this expression is an l-value for an Objective C | |||
3509 | /// property, find the underlying property reference expression. | |||
3510 | const ObjCPropertyRefExpr *Expr::getObjCProperty() const { | |||
3511 | const Expr *E = this; | |||
3512 | while (true) { | |||
3513 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3515, __PRETTY_FUNCTION__)) | |||
3514 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3515, __PRETTY_FUNCTION__)) | |||
3515 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3515, __PRETTY_FUNCTION__)); | |||
3516 | E = E->IgnoreParenCasts(); | |||
3517 | if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | |||
3518 | if (BO->getOpcode() == BO_Comma) { | |||
3519 | E = BO->getRHS(); | |||
3520 | continue; | |||
3521 | } | |||
3522 | } | |||
3523 | ||||
3524 | break; | |||
3525 | } | |||
3526 | ||||
3527 | return cast<ObjCPropertyRefExpr>(E); | |||
3528 | } | |||
3529 | ||||
3530 | bool Expr::isObjCSelfExpr() const { | |||
3531 | const Expr *E = IgnoreParenImpCasts(); | |||
3532 | ||||
3533 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); | |||
3534 | if (!DRE) | |||
3535 | return false; | |||
3536 | ||||
3537 | const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl()); | |||
3538 | if (!Param) | |||
3539 | return false; | |||
3540 | ||||
3541 | const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext()); | |||
3542 | if (!M) | |||
3543 | return false; | |||
3544 | ||||
3545 | return M->getSelfDecl() == Param; | |||
3546 | } | |||
3547 | ||||
3548 | FieldDecl *Expr::getSourceBitField() { | |||
3549 | Expr *E = this->IgnoreParens(); | |||
3550 | ||||
3551 | while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
3552 | if (ICE->getCastKind() == CK_LValueToRValue || | |||
3553 | (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp)) | |||
3554 | E = ICE->getSubExpr()->IgnoreParens(); | |||
3555 | else | |||
3556 | break; | |||
3557 | } | |||
3558 | ||||
3559 | if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) | |||
3560 | if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl())) | |||
3561 | if (Field->isBitField()) | |||
3562 | return Field; | |||
3563 | ||||
3564 | if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) { | |||
3565 | FieldDecl *Ivar = IvarRef->getDecl(); | |||
3566 | if (Ivar->isBitField()) | |||
3567 | return Ivar; | |||
3568 | } | |||
3569 | ||||
3570 | if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) { | |||
3571 | if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl())) | |||
3572 | if (Field->isBitField()) | |||
3573 | return Field; | |||
3574 | ||||
3575 | if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl())) | |||
3576 | if (Expr *E = BD->getBinding()) | |||
3577 | return E->getSourceBitField(); | |||
3578 | } | |||
3579 | ||||
3580 | if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) { | |||
3581 | if (BinOp->isAssignmentOp() && BinOp->getLHS()) | |||
3582 | return BinOp->getLHS()->getSourceBitField(); | |||
3583 | ||||
3584 | if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS()) | |||
3585 | return BinOp->getRHS()->getSourceBitField(); | |||
3586 | } | |||
3587 | ||||
3588 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E)) | |||
3589 | if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp()) | |||
3590 | return UnOp->getSubExpr()->getSourceBitField(); | |||
3591 | ||||
3592 | return nullptr; | |||
3593 | } | |||
3594 | ||||
3595 | bool Expr::refersToVectorElement() const { | |||
3596 | // FIXME: Why do we not just look at the ObjectKind here? | |||
3597 | const Expr *E = this->IgnoreParens(); | |||
3598 | ||||
3599 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) { | |||
3600 | if (ICE->getValueKind() != VK_RValue && | |||
3601 | ICE->getCastKind() == CK_NoOp) | |||
3602 | E = ICE->getSubExpr()->IgnoreParens(); | |||
3603 | else | |||
3604 | break; | |||
3605 | } | |||
3606 | ||||
3607 | if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) | |||
3608 | return ASE->getBase()->getType()->isVectorType(); | |||
3609 | ||||
3610 | if (isa<ExtVectorElementExpr>(E)) | |||
3611 | return true; | |||
3612 | ||||
3613 | if (auto *DRE = dyn_cast<DeclRefExpr>(E)) | |||
3614 | if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl())) | |||
3615 | if (auto *E = BD->getBinding()) | |||
3616 | return E->refersToVectorElement(); | |||
3617 | ||||
3618 | return false; | |||
3619 | } | |||
3620 | ||||
3621 | bool Expr::refersToGlobalRegisterVar() const { | |||
3622 | const Expr *E = this->IgnoreParenImpCasts(); | |||
3623 | ||||
3624 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) | |||
3625 | if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl())) | |||
3626 | if (VD->getStorageClass() == SC_Register && | |||
3627 | VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl()) | |||
3628 | return true; | |||
3629 | ||||
3630 | return false; | |||
3631 | } | |||
3632 | ||||
3633 | /// isArrow - Return true if the base expression is a pointer to vector, | |||
3634 | /// return false if the base expression is a vector. | |||
3635 | bool ExtVectorElementExpr::isArrow() const { | |||
3636 | return getBase()->getType()->isPointerType(); | |||
3637 | } | |||
3638 | ||||
3639 | unsigned ExtVectorElementExpr::getNumElements() const { | |||
3640 | if (const VectorType *VT = getType()->getAs<VectorType>()) | |||
3641 | return VT->getNumElements(); | |||
3642 | return 1; | |||
3643 | } | |||
3644 | ||||
3645 | /// containsDuplicateElements - Return true if any element access is repeated. | |||
3646 | bool ExtVectorElementExpr::containsDuplicateElements() const { | |||
3647 | // FIXME: Refactor this code to an accessor on the AST node which returns the | |||
3648 | // "type" of component access, and share with code below and in Sema. | |||
3649 | StringRef Comp = Accessor->getName(); | |||
3650 | ||||
3651 | // Halving swizzles do not contain duplicate elements. | |||
3652 | if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd") | |||
3653 | return false; | |||
3654 | ||||
3655 | // Advance past s-char prefix on hex swizzles. | |||
3656 | if (Comp[0] == 's' || Comp[0] == 'S') | |||
3657 | Comp = Comp.substr(1); | |||
3658 | ||||
3659 | for (unsigned i = 0, e = Comp.size(); i != e; ++i) | |||
3660 | if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos) | |||
3661 | return true; | |||
3662 | ||||
3663 | return false; | |||
3664 | } | |||
3665 | ||||
3666 | /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. | |||
3667 | void ExtVectorElementExpr::getEncodedElementAccess( | |||
3668 | SmallVectorImpl<uint32_t> &Elts) const { | |||
3669 | StringRef Comp = Accessor->getName(); | |||
3670 | bool isNumericAccessor = false; | |||
3671 | if (Comp[0] == 's' || Comp[0] == 'S') { | |||
3672 | Comp = Comp.substr(1); | |||
3673 | isNumericAccessor = true; | |||
3674 | } | |||
3675 | ||||
3676 | bool isHi = Comp == "hi"; | |||
3677 | bool isLo = Comp == "lo"; | |||
3678 | bool isEven = Comp == "even"; | |||
3679 | bool isOdd = Comp == "odd"; | |||
3680 | ||||
3681 | for (unsigned i = 0, e = getNumElements(); i != e; ++i) { | |||
3682 | uint64_t Index; | |||
3683 | ||||
3684 | if (isHi) | |||
3685 | Index = e + i; | |||
3686 | else if (isLo) | |||
3687 | Index = i; | |||
3688 | else if (isEven) | |||
3689 | Index = 2 * i; | |||
3690 | else if (isOdd) | |||
3691 | Index = 2 * i + 1; | |||
3692 | else | |||
3693 | Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor); | |||
3694 | ||||
3695 | Elts.push_back(Index); | |||
3696 | } | |||
3697 | } | |||
3698 | ||||
3699 | ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args, | |||
3700 | QualType Type, SourceLocation BLoc, | |||
3701 | SourceLocation RP) | |||
3702 | : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary, | |||
3703 | Type->isDependentType(), Type->isDependentType(), | |||
3704 | Type->isInstantiationDependentType(), | |||
3705 | Type->containsUnexpandedParameterPack()), | |||
3706 | BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size()) | |||
3707 | { | |||
3708 | SubExprs = new (C) Stmt*[args.size()]; | |||
3709 | for (unsigned i = 0; i != args.size(); i++) { | |||
3710 | if (args[i]->isTypeDependent()) | |||
3711 | ExprBits.TypeDependent = true; | |||
3712 | if (args[i]->isValueDependent()) | |||
3713 | ExprBits.ValueDependent = true; | |||
3714 | if (args[i]->isInstantiationDependent()) | |||
3715 | ExprBits.InstantiationDependent = true; | |||
3716 | if (args[i]->containsUnexpandedParameterPack()) | |||
3717 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
3718 | ||||
3719 | SubExprs[i] = args[i]; | |||
3720 | } | |||
3721 | } | |||
3722 | ||||
3723 | void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) { | |||
3724 | if (SubExprs) C.Deallocate(SubExprs); | |||
3725 | ||||
3726 | this->NumExprs = Exprs.size(); | |||
3727 | SubExprs = new (C) Stmt*[NumExprs]; | |||
3728 | memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size()); | |||
3729 | } | |||
3730 | ||||
3731 | GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context, | |||
3732 | SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3733 | ArrayRef<TypeSourceInfo*> AssocTypes, | |||
3734 | ArrayRef<Expr*> AssocExprs, | |||
3735 | SourceLocation DefaultLoc, | |||
3736 | SourceLocation RParenLoc, | |||
3737 | bool ContainsUnexpandedParameterPack, | |||
3738 | unsigned ResultIndex) | |||
3739 | : Expr(GenericSelectionExprClass, | |||
3740 | AssocExprs[ResultIndex]->getType(), | |||
3741 | AssocExprs[ResultIndex]->getValueKind(), | |||
3742 | AssocExprs[ResultIndex]->getObjectKind(), | |||
3743 | AssocExprs[ResultIndex]->isTypeDependent(), | |||
3744 | AssocExprs[ResultIndex]->isValueDependent(), | |||
3745 | AssocExprs[ResultIndex]->isInstantiationDependent(), | |||
3746 | ContainsUnexpandedParameterPack), | |||
3747 | AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]), | |||
3748 | SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]), | |||
3749 | NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex), | |||
3750 | GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { | |||
3751 | SubExprs[CONTROLLING] = ControllingExpr; | |||
3752 | assert(AssocTypes.size() == AssocExprs.size())((AssocTypes.size() == AssocExprs.size()) ? static_cast<void > (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3752, __PRETTY_FUNCTION__)); | |||
3753 | std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes); | |||
3754 | std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR); | |||
3755 | } | |||
3756 | ||||
3757 | GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context, | |||
3758 | SourceLocation GenericLoc, Expr *ControllingExpr, | |||
3759 | ArrayRef<TypeSourceInfo*> AssocTypes, | |||
3760 | ArrayRef<Expr*> AssocExprs, | |||
3761 | SourceLocation DefaultLoc, | |||
3762 | SourceLocation RParenLoc, | |||
3763 | bool ContainsUnexpandedParameterPack) | |||
3764 | : Expr(GenericSelectionExprClass, | |||
3765 | Context.DependentTy, | |||
3766 | VK_RValue, | |||
3767 | OK_Ordinary, | |||
3768 | /*isTypeDependent=*/true, | |||
3769 | /*isValueDependent=*/true, | |||
3770 | /*isInstantiationDependent=*/true, | |||
3771 | ContainsUnexpandedParameterPack), | |||
3772 | AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]), | |||
3773 | SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]), | |||
3774 | NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc), | |||
3775 | DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) { | |||
3776 | SubExprs[CONTROLLING] = ControllingExpr; | |||
3777 | assert(AssocTypes.size() == AssocExprs.size())((AssocTypes.size() == AssocExprs.size()) ? static_cast<void > (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3777, __PRETTY_FUNCTION__)); | |||
3778 | std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes); | |||
3779 | std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR); | |||
3780 | } | |||
3781 | ||||
3782 | //===----------------------------------------------------------------------===// | |||
3783 | // DesignatedInitExpr | |||
3784 | //===----------------------------------------------------------------------===// | |||
3785 | ||||
3786 | IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const { | |||
3787 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3787, __PRETTY_FUNCTION__)); | |||
3788 | if (Field.NameOrField & 0x01) | |||
3789 | return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01); | |||
3790 | else | |||
3791 | return getField()->getIdentifier(); | |||
3792 | } | |||
3793 | ||||
3794 | DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty, | |||
3795 | llvm::ArrayRef<Designator> Designators, | |||
3796 | SourceLocation EqualOrColonLoc, | |||
3797 | bool GNUSyntax, | |||
3798 | ArrayRef<Expr*> IndexExprs, | |||
3799 | Expr *Init) | |||
3800 | : Expr(DesignatedInitExprClass, Ty, | |||
3801 | Init->getValueKind(), Init->getObjectKind(), | |||
3802 | Init->isTypeDependent(), Init->isValueDependent(), | |||
3803 | Init->isInstantiationDependent(), | |||
3804 | Init->containsUnexpandedParameterPack()), | |||
3805 | EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax), | |||
3806 | NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) { | |||
3807 | this->Designators = new (C) Designator[NumDesignators]; | |||
3808 | ||||
3809 | // Record the initializer itself. | |||
3810 | child_iterator Child = child_begin(); | |||
3811 | *Child++ = Init; | |||
3812 | ||||
3813 | // Copy the designators and their subexpressions, computing | |||
3814 | // value-dependence along the way. | |||
3815 | unsigned IndexIdx = 0; | |||
3816 | for (unsigned I = 0; I != NumDesignators; ++I) { | |||
3817 | this->Designators[I] = Designators[I]; | |||
3818 | ||||
3819 | if (this->Designators[I].isArrayDesignator()) { | |||
3820 | // Compute type- and value-dependence. | |||
3821 | Expr *Index = IndexExprs[IndexIdx]; | |||
3822 | if (Index->isTypeDependent() || Index->isValueDependent()) | |||
3823 | ExprBits.TypeDependent = ExprBits.ValueDependent = true; | |||
3824 | if (Index->isInstantiationDependent()) | |||
3825 | ExprBits.InstantiationDependent = true; | |||
3826 | // Propagate unexpanded parameter packs. | |||
3827 | if (Index->containsUnexpandedParameterPack()) | |||
3828 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
3829 | ||||
3830 | // Copy the index expressions into permanent storage. | |||
3831 | *Child++ = IndexExprs[IndexIdx++]; | |||
3832 | } else if (this->Designators[I].isArrayRangeDesignator()) { | |||
3833 | // Compute type- and value-dependence. | |||
3834 | Expr *Start = IndexExprs[IndexIdx]; | |||
3835 | Expr *End = IndexExprs[IndexIdx + 1]; | |||
3836 | if (Start->isTypeDependent() || Start->isValueDependent() || | |||
3837 | End->isTypeDependent() || End->isValueDependent()) { | |||
3838 | ExprBits.TypeDependent = ExprBits.ValueDependent = true; | |||
3839 | ExprBits.InstantiationDependent = true; | |||
3840 | } else if (Start->isInstantiationDependent() || | |||
3841 | End->isInstantiationDependent()) { | |||
3842 | ExprBits.InstantiationDependent = true; | |||
3843 | } | |||
3844 | ||||
3845 | // Propagate unexpanded parameter packs. | |||
3846 | if (Start->containsUnexpandedParameterPack() || | |||
3847 | End->containsUnexpandedParameterPack()) | |||
3848 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
3849 | ||||
3850 | // Copy the start/end expressions into permanent storage. | |||
3851 | *Child++ = IndexExprs[IndexIdx++]; | |||
3852 | *Child++ = IndexExprs[IndexIdx++]; | |||
3853 | } | |||
3854 | } | |||
3855 | ||||
3856 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3856, __PRETTY_FUNCTION__)); | |||
3857 | } | |||
3858 | ||||
3859 | DesignatedInitExpr * | |||
3860 | DesignatedInitExpr::Create(const ASTContext &C, | |||
3861 | llvm::ArrayRef<Designator> Designators, | |||
3862 | ArrayRef<Expr*> IndexExprs, | |||
3863 | SourceLocation ColonOrEqualLoc, | |||
3864 | bool UsesColonSyntax, Expr *Init) { | |||
3865 | void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1), | |||
3866 | alignof(DesignatedInitExpr)); | |||
3867 | return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators, | |||
3868 | ColonOrEqualLoc, UsesColonSyntax, | |||
3869 | IndexExprs, Init); | |||
3870 | } | |||
3871 | ||||
3872 | DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C, | |||
3873 | unsigned NumIndexExprs) { | |||
3874 | void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1), | |||
3875 | alignof(DesignatedInitExpr)); | |||
3876 | return new (Mem) DesignatedInitExpr(NumIndexExprs + 1); | |||
3877 | } | |||
3878 | ||||
3879 | void DesignatedInitExpr::setDesignators(const ASTContext &C, | |||
3880 | const Designator *Desigs, | |||
3881 | unsigned NumDesigs) { | |||
3882 | Designators = new (C) Designator[NumDesigs]; | |||
3883 | NumDesignators = NumDesigs; | |||
3884 | for (unsigned I = 0; I != NumDesigs; ++I) | |||
3885 | Designators[I] = Desigs[I]; | |||
3886 | } | |||
3887 | ||||
3888 | SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const { | |||
3889 | DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this); | |||
3890 | if (size() == 1) | |||
3891 | return DIE->getDesignator(0)->getSourceRange(); | |||
3892 | return SourceRange(DIE->getDesignator(0)->getBeginLoc(), | |||
3893 | DIE->getDesignator(size() - 1)->getEndLoc()); | |||
3894 | } | |||
3895 | ||||
3896 | SourceLocation DesignatedInitExpr::getBeginLoc() const { | |||
3897 | SourceLocation StartLoc; | |||
3898 | auto *DIE = const_cast<DesignatedInitExpr *>(this); | |||
3899 | Designator &First = *DIE->getDesignator(0); | |||
3900 | if (First.isFieldDesignator()) { | |||
3901 | if (GNUSyntax) | |||
3902 | StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc); | |||
3903 | else | |||
3904 | StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc); | |||
3905 | } else | |||
3906 | StartLoc = | |||
3907 | SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc); | |||
3908 | return StartLoc; | |||
3909 | } | |||
3910 | ||||
3911 | SourceLocation DesignatedInitExpr::getEndLoc() const { | |||
3912 | return getInit()->getEndLoc(); | |||
3913 | } | |||
3914 | ||||
3915 | Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const { | |||
3916 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3916, __PRETTY_FUNCTION__)); | |||
3917 | return getSubExpr(D.ArrayOrRange.Index + 1); | |||
3918 | } | |||
3919 | ||||
3920 | Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const { | |||
3921 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3922, __PRETTY_FUNCTION__)) | |||
3922 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3922, __PRETTY_FUNCTION__)); | |||
3923 | return getSubExpr(D.ArrayOrRange.Index + 1); | |||
3924 | } | |||
3925 | ||||
3926 | Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const { | |||
3927 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3928, __PRETTY_FUNCTION__)) | |||
3928 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 3928, __PRETTY_FUNCTION__)); | |||
3929 | return getSubExpr(D.ArrayOrRange.Index + 2); | |||
3930 | } | |||
3931 | ||||
3932 | /// Replaces the designator at index @p Idx with the series | |||
3933 | /// of designators in [First, Last). | |||
3934 | void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx, | |||
3935 | const Designator *First, | |||
3936 | const Designator *Last) { | |||
3937 | unsigned NumNewDesignators = Last - First; | |||
3938 | if (NumNewDesignators == 0) { | |||
3939 | std::copy_backward(Designators + Idx + 1, | |||
3940 | Designators + NumDesignators, | |||
3941 | Designators + Idx); | |||
3942 | --NumNewDesignators; | |||
3943 | return; | |||
3944 | } else if (NumNewDesignators == 1) { | |||
3945 | Designators[Idx] = *First; | |||
3946 | return; | |||
3947 | } | |||
3948 | ||||
3949 | Designator *NewDesignators | |||
3950 | = new (C) Designator[NumDesignators - 1 + NumNewDesignators]; | |||
3951 | std::copy(Designators, Designators + Idx, NewDesignators); | |||
3952 | std::copy(First, Last, NewDesignators + Idx); | |||
3953 | std::copy(Designators + Idx + 1, Designators + NumDesignators, | |||
3954 | NewDesignators + Idx + NumNewDesignators); | |||
3955 | Designators = NewDesignators; | |||
3956 | NumDesignators = NumDesignators - 1 + NumNewDesignators; | |||
3957 | } | |||
3958 | ||||
3959 | DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C, | |||
3960 | SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc) | |||
3961 | : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue, | |||
3962 | OK_Ordinary, false, false, false, false) { | |||
3963 | BaseAndUpdaterExprs[0] = baseExpr; | |||
3964 | ||||
3965 | InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc); | |||
3966 | ILE->setType(baseExpr->getType()); | |||
3967 | BaseAndUpdaterExprs[1] = ILE; | |||
3968 | } | |||
3969 | ||||
3970 | SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const { | |||
3971 | return getBase()->getBeginLoc(); | |||
3972 | } | |||
3973 | ||||
3974 | SourceLocation DesignatedInitUpdateExpr::getEndLoc() const { | |||
3975 | return getBase()->getEndLoc(); | |||
3976 | } | |||
3977 | ||||
3978 | ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc, | |||
3979 | ArrayRef<Expr*> exprs, | |||
3980 | SourceLocation rparenloc) | |||
3981 | : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, | |||
3982 | false, false, false, false), | |||
3983 | NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) { | |||
3984 | Exprs = new (C) Stmt*[exprs.size()]; | |||
| ||||
3985 | for (unsigned i = 0; i != exprs.size(); ++i) { | |||
3986 | if (exprs[i]->isTypeDependent()) | |||
3987 | ExprBits.TypeDependent = true; | |||
3988 | if (exprs[i]->isValueDependent()) | |||
3989 | ExprBits.ValueDependent = true; | |||
3990 | if (exprs[i]->isInstantiationDependent()) | |||
3991 | ExprBits.InstantiationDependent = true; | |||
3992 | if (exprs[i]->containsUnexpandedParameterPack()) | |||
3993 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
3994 | ||||
3995 | Exprs[i] = exprs[i]; | |||
| ||||
3996 | } | |||
3997 | } | |||
3998 | ||||
3999 | const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) { | |||
4000 | if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e)) | |||
4001 | e = ewc->getSubExpr(); | |||
4002 | if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e)) | |||
4003 | e = m->GetTemporaryExpr(); | |||
4004 | e = cast<CXXConstructExpr>(e)->getArg(0); | |||
4005 | while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e)) | |||
4006 | e = ice->getSubExpr(); | |||
4007 | return cast<OpaqueValueExpr>(e); | |||
4008 | } | |||
4009 | ||||
4010 | PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context, | |||
4011 | EmptyShell sh, | |||
4012 | unsigned numSemanticExprs) { | |||
4013 | void *buffer = | |||
4014 | Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs), | |||
4015 | alignof(PseudoObjectExpr)); | |||
4016 | return new(buffer) PseudoObjectExpr(sh, numSemanticExprs); | |||
4017 | } | |||
4018 | ||||
4019 | PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs) | |||
4020 | : Expr(PseudoObjectExprClass, shell) { | |||
4021 | PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1; | |||
4022 | } | |||
4023 | ||||
4024 | PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax, | |||
4025 | ArrayRef<Expr*> semantics, | |||
4026 | unsigned resultIndex) { | |||
4027 | assert(syntax && "no syntactic expression!")((syntax && "no syntactic expression!") ? static_cast <void> (0) : __assert_fail ("syntax && \"no syntactic expression!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4027, __PRETTY_FUNCTION__)); | |||
4028 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4028, __PRETTY_FUNCTION__)); | |||
4029 | ||||
4030 | QualType type; | |||
4031 | ExprValueKind VK; | |||
4032 | if (resultIndex == NoResult) { | |||
4033 | type = C.VoidTy; | |||
4034 | VK = VK_RValue; | |||
4035 | } else { | |||
4036 | assert(resultIndex < semantics.size())((resultIndex < semantics.size()) ? static_cast<void> (0) : __assert_fail ("resultIndex < semantics.size()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4036, __PRETTY_FUNCTION__)); | |||
4037 | type = semantics[resultIndex]->getType(); | |||
4038 | VK = semantics[resultIndex]->getValueKind(); | |||
4039 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4039, __PRETTY_FUNCTION__)); | |||
4040 | } | |||
4041 | ||||
4042 | void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1), | |||
4043 | alignof(PseudoObjectExpr)); | |||
4044 | return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics, | |||
4045 | resultIndex); | |||
4046 | } | |||
4047 | ||||
4048 | PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK, | |||
4049 | Expr *syntax, ArrayRef<Expr*> semantics, | |||
4050 | unsigned resultIndex) | |||
4051 | : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary, | |||
4052 | /*filled in at end of ctor*/ false, false, false, false) { | |||
4053 | PseudoObjectExprBits.NumSubExprs = semantics.size() + 1; | |||
4054 | PseudoObjectExprBits.ResultIndex = resultIndex + 1; | |||
4055 | ||||
4056 | for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) { | |||
4057 | Expr *E = (i == 0 ? syntax : semantics[i-1]); | |||
4058 | getSubExprsBuffer()[i] = E; | |||
4059 | ||||
4060 | if (E->isTypeDependent()) | |||
4061 | ExprBits.TypeDependent = true; | |||
4062 | if (E->isValueDependent()) | |||
4063 | ExprBits.ValueDependent = true; | |||
4064 | if (E->isInstantiationDependent()) | |||
4065 | ExprBits.InstantiationDependent = true; | |||
4066 | if (E->containsUnexpandedParameterPack()) | |||
4067 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4068 | ||||
4069 | if (isa<OpaqueValueExpr>(E)) | |||
4070 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4072, __PRETTY_FUNCTION__)) | |||
4071 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4072, __PRETTY_FUNCTION__)) | |||
4072 | "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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4072, __PRETTY_FUNCTION__)); | |||
4073 | } | |||
4074 | } | |||
4075 | ||||
4076 | //===----------------------------------------------------------------------===// | |||
4077 | // Child Iterators for iterating over subexpressions/substatements | |||
4078 | //===----------------------------------------------------------------------===// | |||
4079 | ||||
4080 | // UnaryExprOrTypeTraitExpr | |||
4081 | Stmt::child_range UnaryExprOrTypeTraitExpr::children() { | |||
4082 | const_child_range CCR = | |||
4083 | const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children(); | |||
4084 | return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end())); | |||
4085 | } | |||
4086 | ||||
4087 | Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const { | |||
4088 | // If this is of a type and the type is a VLA type (and not a typedef), the | |||
4089 | // size expression of the VLA needs to be treated as an executable expression. | |||
4090 | // Why isn't this weirdness documented better in StmtIterator? | |||
4091 | if (isArgumentType()) { | |||
4092 | if (const VariableArrayType *T = | |||
4093 | dyn_cast<VariableArrayType>(getArgumentType().getTypePtr())) | |||
4094 | return const_child_range(const_child_iterator(T), const_child_iterator()); | |||
4095 | return const_child_range(const_child_iterator(), const_child_iterator()); | |||
4096 | } | |||
4097 | return const_child_range(&Argument.Ex, &Argument.Ex + 1); | |||
4098 | } | |||
4099 | ||||
4100 | AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args, | |||
4101 | QualType t, AtomicOp op, SourceLocation RP) | |||
4102 | : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary, | |||
4103 | false, false, false, false), | |||
4104 | NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op) | |||
4105 | { | |||
4106 | 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-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4106, __PRETTY_FUNCTION__)); | |||
4107 | for (unsigned i = 0; i != args.size(); i++) { | |||
4108 | if (args[i]->isTypeDependent()) | |||
4109 | ExprBits.TypeDependent = true; | |||
4110 | if (args[i]->isValueDependent()) | |||
4111 | ExprBits.ValueDependent = true; | |||
4112 | if (args[i]->isInstantiationDependent()) | |||
4113 | ExprBits.InstantiationDependent = true; | |||
4114 | if (args[i]->containsUnexpandedParameterPack()) | |||
4115 | ExprBits.ContainsUnexpandedParameterPack = true; | |||
4116 | ||||
4117 | SubExprs[i] = args[i]; | |||
4118 | } | |||
4119 | } | |||
4120 | ||||
4121 | unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) { | |||
4122 | switch (Op) { | |||
4123 | case AO__c11_atomic_init: | |||
4124 | case AO__opencl_atomic_init: | |||
4125 | case AO__c11_atomic_load: | |||
4126 | case AO__atomic_load_n: | |||
4127 | return 2; | |||
4128 | ||||
4129 | case AO__opencl_atomic_load: | |||
4130 | case AO__c11_atomic_store: | |||
4131 | case AO__c11_atomic_exchange: | |||
4132 | case AO__atomic_load: | |||
4133 | case AO__atomic_store: | |||
4134 | case AO__atomic_store_n: | |||
4135 | case AO__atomic_exchange_n: | |||
4136 | case AO__c11_atomic_fetch_add: | |||
4137 | case AO__c11_atomic_fetch_sub: | |||
4138 | case AO__c11_atomic_fetch_and: | |||
4139 | case AO__c11_atomic_fetch_or: | |||
4140 | case AO__c11_atomic_fetch_xor: | |||
4141 | case AO__atomic_fetch_add: | |||
4142 | case AO__atomic_fetch_sub: | |||
4143 | case AO__atomic_fetch_and: | |||
4144 | case AO__atomic_fetch_or: | |||
4145 | case AO__atomic_fetch_xor: | |||
4146 | case AO__atomic_fetch_nand: | |||
4147 | case AO__atomic_add_fetch: | |||
4148 | case AO__atomic_sub_fetch: | |||
4149 | case AO__atomic_and_fetch: | |||
4150 | case AO__atomic_or_fetch: | |||
4151 | case AO__atomic_xor_fetch: | |||
4152 | case AO__atomic_nand_fetch: | |||
4153 | case AO__atomic_fetch_min: | |||
4154 | case AO__atomic_fetch_max: | |||
4155 | return 3; | |||
4156 | ||||
4157 | case AO__opencl_atomic_store: | |||
4158 | case AO__opencl_atomic_exchange: | |||
4159 | case AO__opencl_atomic_fetch_add: | |||
4160 | case AO__opencl_atomic_fetch_sub: | |||
4161 | case AO__opencl_atomic_fetch_and: | |||
4162 | case AO__opencl_atomic_fetch_or: | |||
4163 | case AO__opencl_atomic_fetch_xor: | |||
4164 | case AO__opencl_atomic_fetch_min: | |||
4165 | case AO__opencl_atomic_fetch_max: | |||
4166 | case AO__atomic_exchange: | |||
4167 | return 4; | |||
4168 | ||||
4169 | case AO__c11_atomic_compare_exchange_strong: | |||
4170 | case AO__c11_atomic_compare_exchange_weak: | |||
4171 | return 5; | |||
4172 | ||||
4173 | case AO__opencl_atomic_compare_exchange_strong: | |||
4174 | case AO__opencl_atomic_compare_exchange_weak: | |||
4175 | case AO__atomic_compare_exchange: | |||
4176 | case AO__atomic_compare_exchange_n: | |||
4177 | return 6; | |||
4178 | } | |||
4179 | llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4179); | |||
4180 | } | |||
4181 | ||||
4182 | QualType AtomicExpr::getValueType() const { | |||
4183 | auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType(); | |||
4184 | if (auto AT = T->getAs<AtomicType>()) | |||
4185 | return AT->getValueType(); | |||
4186 | return T; | |||
4187 | } | |||
4188 | ||||
4189 | QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) { | |||
4190 | unsigned ArraySectionCount = 0; | |||
4191 | while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) { | |||
4192 | Base = OASE->getBase(); | |||
4193 | ++ArraySectionCount; | |||
4194 | } | |||
4195 | while (auto *ASE = | |||
4196 | dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) { | |||
4197 | Base = ASE->getBase(); | |||
4198 | ++ArraySectionCount; | |||
4199 | } | |||
4200 | Base = Base->IgnoreParenImpCasts(); | |||
4201 | auto OriginalTy = Base->getType(); | |||
4202 | if (auto *DRE = dyn_cast<DeclRefExpr>(Base)) | |||
4203 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) | |||
4204 | OriginalTy = PVD->getOriginalType().getNonReferenceType(); | |||
4205 | ||||
4206 | for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) { | |||
4207 | if (OriginalTy->isAnyPointerType()) | |||
4208 | OriginalTy = OriginalTy->getPointeeType(); | |||
4209 | else { | |||
4210 | assert (OriginalTy->isArrayType())((OriginalTy->isArrayType()) ? static_cast<void> (0) : __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/AST/Expr.cpp" , 4210, __PRETTY_FUNCTION__)); | |||
4211 | OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType(); | |||
4212 | } | |||
4213 | } | |||
4214 | return OriginalTy; | |||
4215 | } |