Bug Summary

File:tools/clang/lib/AST/Expr.cpp
Warning:line 3949, column 14
Array access (via field 'Exprs') results in a null pointer dereference

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Expr.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/AST -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp -faddrsig
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>
36using namespace clang;
37
38const 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
63const 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
77const 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())(static_cast <bool> (ME->getBase()->getType()->
isRecordType()) ? void (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 101, __extension__ __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())(static_cast <bool> (BO->getRHS()->isRValue()) ? void
(0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 112, __extension__ __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.
135bool 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:{getLocStart(),getLocEnd()}.
196namespace {
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)->getLocStart();
213 }
214}
215
216SourceLocation 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-7~svn338205/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-7~svn338205/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.
236static 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
329void 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
345DeclRefExpr::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")(static_cast <bool> (!Dependent && "built a DeclRefExpr with dependent template args"
) ? void (0) : __assert_fail ("!Dependent && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 379, __extension__ __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
391DeclRefExpr *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
407DeclRefExpr *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
435DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
436 bool HasQualifier,
437 bool HasFoundDecl,
438 bool HasTemplateKWAndArgsInfo,
439 unsigned NumTemplateArgs) {
440 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)(static_cast <bool> (NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo
) ? void (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 440, __extension__ __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
450SourceLocation DeclRefExpr::getLocStart() const {
451 if (hasQualifier())
452 return getQualifierLoc().getBeginLoc();
453 return getNameInfo().getLocStart();
454}
455SourceLocation DeclRefExpr::getLocEnd() const {
456 if (hasExplicitTemplateArgs())
457 return getRAngleLoc();
458 return getNameInfo().getLocEnd();
459}
460
461PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
462 StringLiteral *SL)
463 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
464 FNTy->isDependentType(), FNTy->isDependentType(),
465 FNTy->isInstantiationDependentType(),
466 /*ContainsUnexpandedParameterPack=*/false),
467 Loc(L), Type(IT), FnName(SL) {}
468
469StringLiteral *PredefinedExpr::getFunctionName() {
470 return cast_or_null<StringLiteral>(FnName);
471}
472
473StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
474 switch (IT) {
475 case Func:
476 return "__func__";
477 case Function:
478 return "__FUNCTION__";
479 case FuncDName:
480 return "__FUNCDNAME__";
481 case LFunction:
482 return "L__FUNCTION__";
483 case PrettyFunction:
484 return "__PRETTY_FUNCTION__";
485 case FuncSig:
486 return "__FUNCSIG__";
487 case LFuncSig:
488 return "L__FUNCSIG__";
489 case PrettyFunctionNoVirtual:
490 break;
491 }
492 llvm_unreachable("Unknown ident type for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident type for PredefinedExpr"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 492)
;
493}
494
495// FIXME: Maybe this should use DeclPrinter with a special "print predefined
496// expr" policy instead.
497std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
498 ASTContext &Context = CurrentDecl->getASTContext();
499
500 if (IT == PredefinedExpr::FuncDName) {
501 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
502 std::unique_ptr<MangleContext> MC;
503 MC.reset(Context.createMangleContext());
504
505 if (MC->shouldMangleDeclName(ND)) {
506 SmallString<256> Buffer;
507 llvm::raw_svector_ostream Out(Buffer);
508 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
509 MC->mangleCXXCtor(CD, Ctor_Base, Out);
510 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
511 MC->mangleCXXDtor(DD, Dtor_Base, Out);
512 else
513 MC->mangleName(ND, Out);
514
515 if (!Buffer.empty() && Buffer.front() == '\01')
516 return Buffer.substr(1);
517 return Buffer.str();
518 } else
519 return ND->getIdentifier()->getName();
520 }
521 return "";
522 }
523 if (isa<BlockDecl>(CurrentDecl)) {
524 // For blocks we only emit something if it is enclosed in a function
525 // For top-level block we'd like to include the name of variable, but we
526 // don't have it at this point.
527 auto DC = CurrentDecl->getDeclContext();
528 if (DC->isFileContext())
529 return "";
530
531 SmallString<256> Buffer;
532 llvm::raw_svector_ostream Out(Buffer);
533 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
534 // For nested blocks, propagate up to the parent.
535 Out << ComputeName(IT, DCBlock);
536 else if (auto *DCDecl = dyn_cast<Decl>(DC))
537 Out << ComputeName(IT, DCDecl) << "_block_invoke";
538 return Out.str();
539 }
540 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
541 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual &&
542 IT != FuncSig && IT != LFuncSig)
543 return FD->getNameAsString();
544
545 SmallString<256> Name;
546 llvm::raw_svector_ostream Out(Name);
547
548 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
549 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
550 Out << "virtual ";
551 if (MD->isStatic())
552 Out << "static ";
553 }
554
555 PrintingPolicy Policy(Context.getLangOpts());
556 std::string Proto;
557 llvm::raw_string_ostream POut(Proto);
558
559 const FunctionDecl *Decl = FD;
560 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
561 Decl = Pattern;
562 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
563 const FunctionProtoType *FT = nullptr;
564 if (FD->hasWrittenPrototype())
565 FT = dyn_cast<FunctionProtoType>(AFT);
566
567 if (IT == FuncSig || IT == LFuncSig) {
568 switch (AFT->getCallConv()) {
569 case CC_C: POut << "__cdecl "; break;
570 case CC_X86StdCall: POut << "__stdcall "; break;
571 case CC_X86FastCall: POut << "__fastcall "; break;
572 case CC_X86ThisCall: POut << "__thiscall "; break;
573 case CC_X86VectorCall: POut << "__vectorcall "; break;
574 case CC_X86RegCall: POut << "__regcall "; break;
575 // Only bother printing the conventions that MSVC knows about.
576 default: break;
577 }
578 }
579
580 FD->printQualifiedName(POut, Policy);
581
582 POut << "(";
583 if (FT) {
584 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
585 if (i) POut << ", ";
586 POut << Decl->getParamDecl(i)->getType().stream(Policy);
587 }
588
589 if (FT->isVariadic()) {
590 if (FD->getNumParams()) POut << ", ";
591 POut << "...";
592 } else if ((IT == FuncSig || IT == LFuncSig ||
593 !Context.getLangOpts().CPlusPlus) &&
594 !Decl->getNumParams()) {
595 POut << "void";
596 }
597 }
598 POut << ")";
599
600 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
601 assert(FT && "We must have a written prototype in this case.")(static_cast <bool> (FT && "We must have a written prototype in this case."
) ? void (0) : __assert_fail ("FT && \"We must have a written prototype in this case.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 601, __extension__ __PRETTY_FUNCTION__))
;
602 if (FT->isConst())
603 POut << " const";
604 if (FT->isVolatile())
605 POut << " volatile";
606 RefQualifierKind Ref = MD->getRefQualifier();
607 if (Ref == RQ_LValue)
608 POut << " &";
609 else if (Ref == RQ_RValue)
610 POut << " &&";
611 }
612
613 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
614 SpecsTy Specs;
615 const DeclContext *Ctx = FD->getDeclContext();
616 while (Ctx && isa<NamedDecl>(Ctx)) {
617 const ClassTemplateSpecializationDecl *Spec
618 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
619 if (Spec && !Spec->isExplicitSpecialization())
620 Specs.push_back(Spec);
621 Ctx = Ctx->getParent();
622 }
623
624 std::string TemplateParams;
625 llvm::raw_string_ostream TOut(TemplateParams);
626 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
627 I != E; ++I) {
628 const TemplateParameterList *Params
629 = (*I)->getSpecializedTemplate()->getTemplateParameters();
630 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
631 assert(Params->size() == Args.size())(static_cast <bool> (Params->size() == Args.size()) ?
void (0) : __assert_fail ("Params->size() == Args.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 631, __extension__ __PRETTY_FUNCTION__))
;
632 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
633 StringRef Param = Params->getParam(i)->getName();
634 if (Param.empty()) continue;
635 TOut << Param << " = ";
636 Args.get(i).print(Policy, TOut);
637 TOut << ", ";
638 }
639 }
640
641 FunctionTemplateSpecializationInfo *FSI
642 = FD->getTemplateSpecializationInfo();
643 if (FSI && !FSI->isExplicitSpecialization()) {
644 const TemplateParameterList* Params
645 = FSI->getTemplate()->getTemplateParameters();
646 const TemplateArgumentList* Args = FSI->TemplateArguments;
647 assert(Params->size() == Args->size())(static_cast <bool> (Params->size() == Args->size
()) ? void (0) : __assert_fail ("Params->size() == Args->size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 647, __extension__ __PRETTY_FUNCTION__))
;
648 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
649 StringRef Param = Params->getParam(i)->getName();
650 if (Param.empty()) continue;
651 TOut << Param << " = ";
652 Args->get(i).print(Policy, TOut);
653 TOut << ", ";
654 }
655 }
656
657 TOut.flush();
658 if (!TemplateParams.empty()) {
659 // remove the trailing comma and space
660 TemplateParams.resize(TemplateParams.size() - 2);
661 POut << " [" << TemplateParams << "]";
662 }
663
664 POut.flush();
665
666 // Print "auto" for all deduced return types. This includes C++1y return
667 // type deduction and lambdas. For trailing return types resolve the
668 // decltype expression. Otherwise print the real type when this is
669 // not a constructor or destructor.
670 if (isa<CXXMethodDecl>(FD) &&
671 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
672 Proto = "auto " + Proto;
673 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
674 FT->getReturnType()
675 ->getAs<DecltypeType>()
676 ->getUnderlyingType()
677 .getAsStringInternal(Proto, Policy);
678 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
679 AFT->getReturnType().getAsStringInternal(Proto, Policy);
680
681 Out << Proto;
682
683 return Name.str().str();
684 }
685 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
686 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
687 // Skip to its enclosing function or method, but not its enclosing
688 // CapturedDecl.
689 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
690 const Decl *D = Decl::castFromDeclContext(DC);
691 return ComputeName(IT, D);
692 }
693 llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 693)
;
694 }
695 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
696 SmallString<256> Name;
697 llvm::raw_svector_ostream Out(Name);
698 Out << (MD->isInstanceMethod() ? '-' : '+');
699 Out << '[';
700
701 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
702 // a null check to avoid a crash.
703 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
704 Out << *ID;
705
706 if (const ObjCCategoryImplDecl *CID =
707 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
708 Out << '(' << *CID << ')';
709
710 Out << ' ';
711 MD->getSelector().print(Out);
712 Out << ']';
713
714 return Name.str().str();
715 }
716 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
717 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
718 return "top level";
719 }
720 return "";
721}
722
723void APNumericStorage::setIntValue(const ASTContext &C,
724 const llvm::APInt &Val) {
725 if (hasAllocation())
726 C.Deallocate(pVal);
727
728 BitWidth = Val.getBitWidth();
729 unsigned NumWords = Val.getNumWords();
730 const uint64_t* Words = Val.getRawData();
731 if (NumWords > 1) {
732 pVal = new (C) uint64_t[NumWords];
733 std::copy(Words, Words + NumWords, pVal);
734 } else if (NumWords == 1)
735 VAL = Words[0];
736 else
737 VAL = 0;
738}
739
740IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
741 QualType type, SourceLocation l)
742 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
743 false, false),
744 Loc(l) {
745 assert(type->isIntegerType() && "Illegal type in IntegerLiteral")(static_cast <bool> (type->isIntegerType() &&
"Illegal type in IntegerLiteral") ? void (0) : __assert_fail
("type->isIntegerType() && \"Illegal type in IntegerLiteral\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 745, __extension__ __PRETTY_FUNCTION__))
;
746 assert(V.getBitWidth() == C.getIntWidth(type) &&(static_cast <bool> (V.getBitWidth() == C.getIntWidth(type
) && "Integer type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 747, __extension__ __PRETTY_FUNCTION__))
747 "Integer type is not the correct size for constant.")(static_cast <bool> (V.getBitWidth() == C.getIntWidth(type
) && "Integer type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 747, __extension__ __PRETTY_FUNCTION__))
;
748 setValue(C, V);
749}
750
751IntegerLiteral *
752IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
753 QualType type, SourceLocation l) {
754 return new (C) IntegerLiteral(C, V, type, l);
755}
756
757IntegerLiteral *
758IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
759 return new (C) IntegerLiteral(Empty);
760}
761
762FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
763 QualType type, SourceLocation l,
764 unsigned Scale)
765 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
766 false, false),
767 Loc(l), Scale(Scale) {
768 assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral")(static_cast <bool> (type->isFixedPointType() &&
"Illegal type in FixedPointLiteral") ? void (0) : __assert_fail
("type->isFixedPointType() && \"Illegal type in FixedPointLiteral\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 768, __extension__ __PRETTY_FUNCTION__))
;
769 assert(V.getBitWidth() == C.getTypeInfo(type).Width &&(static_cast <bool> (V.getBitWidth() == C.getTypeInfo(type
).Width && "Fixed point type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 770, __extension__ __PRETTY_FUNCTION__))
770 "Fixed point type is not the correct size for constant.")(static_cast <bool> (V.getBitWidth() == C.getTypeInfo(type
).Width && "Fixed point type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 770, __extension__ __PRETTY_FUNCTION__))
;
771 setValue(C, V);
772}
773
774FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
775 const llvm::APInt &V,
776 QualType type,
777 SourceLocation l,
778 unsigned Scale) {
779 return new (C) FixedPointLiteral(C, V, type, l, Scale);
780}
781
782std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
783 // Currently the longest decimal number that can be printed is the max for an
784 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
785 // which is 43 characters.
786 SmallString<64> S;
787 FixedPointValueToString(
788 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale, Radix);
789 return S.str();
790}
791
792FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
793 bool isexact, QualType Type, SourceLocation L)
794 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
795 false, false), Loc(L) {
796 setSemantics(V.getSemantics());
797 FloatingLiteralBits.IsExact = isexact;
798 setValue(C, V);
799}
800
801FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
802 : Expr(FloatingLiteralClass, Empty) {
803 setRawSemantics(IEEEhalf);
804 FloatingLiteralBits.IsExact = false;
805}
806
807FloatingLiteral *
808FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
809 bool isexact, QualType Type, SourceLocation L) {
810 return new (C) FloatingLiteral(C, V, isexact, Type, L);
811}
812
813FloatingLiteral *
814FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
815 return new (C) FloatingLiteral(C, Empty);
816}
817
818const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
819 switch(FloatingLiteralBits.Semantics) {
820 case IEEEhalf:
821 return llvm::APFloat::IEEEhalf();
822 case IEEEsingle:
823 return llvm::APFloat::IEEEsingle();
824 case IEEEdouble:
825 return llvm::APFloat::IEEEdouble();
826 case x87DoubleExtended:
827 return llvm::APFloat::x87DoubleExtended();
828 case IEEEquad:
829 return llvm::APFloat::IEEEquad();
830 case PPCDoubleDouble:
831 return llvm::APFloat::PPCDoubleDouble();
832 }
833 llvm_unreachable("Unrecognised floating semantics")::llvm::llvm_unreachable_internal("Unrecognised floating semantics"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 833)
;
834}
835
836void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
837 if (&Sem == &llvm::APFloat::IEEEhalf())
838 FloatingLiteralBits.Semantics = IEEEhalf;
839 else if (&Sem == &llvm::APFloat::IEEEsingle())
840 FloatingLiteralBits.Semantics = IEEEsingle;
841 else if (&Sem == &llvm::APFloat::IEEEdouble())
842 FloatingLiteralBits.Semantics = IEEEdouble;
843 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
844 FloatingLiteralBits.Semantics = x87DoubleExtended;
845 else if (&Sem == &llvm::APFloat::IEEEquad())
846 FloatingLiteralBits.Semantics = IEEEquad;
847 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
848 FloatingLiteralBits.Semantics = PPCDoubleDouble;
849 else
850 llvm_unreachable("Unknown floating semantics")::llvm::llvm_unreachable_internal("Unknown floating semantics"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 850)
;
851}
852
853/// getValueAsApproximateDouble - This returns the value as an inaccurate
854/// double. Note that this may cause loss of precision, but is useful for
855/// debugging dumps, etc.
856double FloatingLiteral::getValueAsApproximateDouble() const {
857 llvm::APFloat V = getValue();
858 bool ignored;
859 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
860 &ignored);
861 return V.convertToDouble();
862}
863
864int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
865 int CharByteWidth = 0;
866 switch(k) {
867 case Ascii:
868 case UTF8:
869 CharByteWidth = target.getCharWidth();
870 break;
871 case Wide:
872 CharByteWidth = target.getWCharWidth();
873 break;
874 case UTF16:
875 CharByteWidth = target.getChar16Width();
876 break;
877 case UTF32:
878 CharByteWidth = target.getChar32Width();
879 break;
880 }
881 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple")(static_cast <bool> ((CharByteWidth & 7) == 0 &&
"Assumes character size is byte multiple") ? void (0) : __assert_fail
("(CharByteWidth & 7) == 0 && \"Assumes character size is byte multiple\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 881, __extension__ __PRETTY_FUNCTION__))
;
882 CharByteWidth /= 8;
883 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)(static_cast <bool> ((CharByteWidth==1 || CharByteWidth
==2 || CharByteWidth==4) && "character byte widths supported are 1, 2, and 4 only"
) ? void (0) : __assert_fail ("(CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && \"character byte widths supported are 1, 2, and 4 only\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 884, __extension__ __PRETTY_FUNCTION__))
884 && "character byte widths supported are 1, 2, and 4 only")(static_cast <bool> ((CharByteWidth==1 || CharByteWidth
==2 || CharByteWidth==4) && "character byte widths supported are 1, 2, and 4 only"
) ? void (0) : __assert_fail ("(CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4) && \"character byte widths supported are 1, 2, and 4 only\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 884, __extension__ __PRETTY_FUNCTION__))
;
885 return CharByteWidth;
886}
887
888StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
889 StringKind Kind, bool Pascal, QualType Ty,
890 const SourceLocation *Loc,
891 unsigned NumStrs) {
892 assert(C.getAsConstantArrayType(Ty) &&(static_cast <bool> (C.getAsConstantArrayType(Ty) &&
"StringLiteral must be of constant array type!") ? void (0) :
__assert_fail ("C.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 893, __extension__ __PRETTY_FUNCTION__))
893 "StringLiteral must be of constant array type!")(static_cast <bool> (C.getAsConstantArrayType(Ty) &&
"StringLiteral must be of constant array type!") ? void (0) :
__assert_fail ("C.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 893, __extension__ __PRETTY_FUNCTION__))
;
894
895 // Allocate enough space for the StringLiteral plus an array of locations for
896 // any concatenated string tokens.
897 void *Mem =
898 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
899 alignof(StringLiteral));
900 StringLiteral *SL = new (Mem) StringLiteral(Ty);
901
902 // OPTIMIZE: could allocate this appended to the StringLiteral.
903 SL->setString(C,Str,Kind,Pascal);
904
905 SL->TokLocs[0] = Loc[0];
906 SL->NumConcatenated = NumStrs;
907
908 if (NumStrs != 1)
909 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
910 return SL;
911}
912
913StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
914 unsigned NumStrs) {
915 void *Mem =
916 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
917 alignof(StringLiteral));
918 StringLiteral *SL =
919 new (Mem) StringLiteral(C.adjustStringLiteralBaseType(QualType()));
920 SL->CharByteWidth = 0;
921 SL->Length = 0;
922 SL->NumConcatenated = NumStrs;
923 return SL;
924}
925
926void StringLiteral::outputString(raw_ostream &OS) const {
927 switch (getKind()) {
928 case Ascii: break; // no prefix.
929 case Wide: OS << 'L'; break;
930 case UTF8: OS << "u8"; break;
931 case UTF16: OS << 'u'; break;
932 case UTF32: OS << 'U'; break;
933 }
934 OS << '"';
935 static const char Hex[] = "0123456789ABCDEF";
936
937 unsigned LastSlashX = getLength();
938 for (unsigned I = 0, N = getLength(); I != N; ++I) {
939 switch (uint32_t Char = getCodeUnit(I)) {
940 default:
941 // FIXME: Convert UTF-8 back to codepoints before rendering.
942
943 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
944 // Leave invalid surrogates alone; we'll use \x for those.
945 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
946 Char <= 0xdbff) {
947 uint32_t Trail = getCodeUnit(I + 1);
948 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
949 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
950 ++I;
951 }
952 }
953
954 if (Char > 0xff) {
955 // If this is a wide string, output characters over 0xff using \x
956 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
957 // codepoint: use \x escapes for invalid codepoints.
958 if (getKind() == Wide ||
959 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
960 // FIXME: Is this the best way to print wchar_t?
961 OS << "\\x";
962 int Shift = 28;
963 while ((Char >> Shift) == 0)
964 Shift -= 4;
965 for (/**/; Shift >= 0; Shift -= 4)
966 OS << Hex[(Char >> Shift) & 15];
967 LastSlashX = I;
968 break;
969 }
970
971 if (Char > 0xffff)
972 OS << "\\U00"
973 << Hex[(Char >> 20) & 15]
974 << Hex[(Char >> 16) & 15];
975 else
976 OS << "\\u";
977 OS << Hex[(Char >> 12) & 15]
978 << Hex[(Char >> 8) & 15]
979 << Hex[(Char >> 4) & 15]
980 << Hex[(Char >> 0) & 15];
981 break;
982 }
983
984 // If we used \x... for the previous character, and this character is a
985 // hexadecimal digit, prevent it being slurped as part of the \x.
986 if (LastSlashX + 1 == I) {
987 switch (Char) {
988 case '0': case '1': case '2': case '3': case '4':
989 case '5': case '6': case '7': case '8': case '9':
990 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
991 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
992 OS << "\"\"";
993 }
994 }
995
996 assert(Char <= 0xff &&(static_cast <bool> (Char <= 0xff && "Characters above 0xff should already have been handled."
) ? void (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 997, __extension__ __PRETTY_FUNCTION__))
997 "Characters above 0xff should already have been handled.")(static_cast <bool> (Char <= 0xff && "Characters above 0xff should already have been handled."
) ? void (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 997, __extension__ __PRETTY_FUNCTION__))
;
998
999 if (isPrintable(Char))
1000 OS << (char)Char;
1001 else // Output anything hard as an octal escape.
1002 OS << '\\'
1003 << (char)('0' + ((Char >> 6) & 7))
1004 << (char)('0' + ((Char >> 3) & 7))
1005 << (char)('0' + ((Char >> 0) & 7));
1006 break;
1007 // Handle some common non-printable cases to make dumps prettier.
1008 case '\\': OS << "\\\\"; break;
1009 case '"': OS << "\\\""; break;
1010 case '\a': OS << "\\a"; break;
1011 case '\b': OS << "\\b"; break;
1012 case '\f': OS << "\\f"; break;
1013 case '\n': OS << "\\n"; break;
1014 case '\r': OS << "\\r"; break;
1015 case '\t': OS << "\\t"; break;
1016 case '\v': OS << "\\v"; break;
1017 }
1018 }
1019 OS << '"';
1020}
1021
1022void StringLiteral::setString(const ASTContext &C, StringRef Str,
1023 StringKind Kind, bool IsPascal) {
1024 //FIXME: we assume that the string data comes from a target that uses the same
1025 // code unit size and endianness for the type of string.
1026 this->Kind = Kind;
1027 this->IsPascal = IsPascal;
1028
1029 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
1030 assert((Str.size()%CharByteWidth == 0)(static_cast <bool> ((Str.size()%CharByteWidth == 0) &&
"size of data must be multiple of CharByteWidth") ? void (0)
: __assert_fail ("(Str.size()%CharByteWidth == 0) && \"size of data must be multiple of CharByteWidth\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1031, __extension__ __PRETTY_FUNCTION__))
1031 && "size of data must be multiple of CharByteWidth")(static_cast <bool> ((Str.size()%CharByteWidth == 0) &&
"size of data must be multiple of CharByteWidth") ? void (0)
: __assert_fail ("(Str.size()%CharByteWidth == 0) && \"size of data must be multiple of CharByteWidth\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1031, __extension__ __PRETTY_FUNCTION__))
;
1032 Length = Str.size()/CharByteWidth;
1033
1034 switch(CharByteWidth) {
1035 case 1: {
1036 char *AStrData = new (C) char[Length];
1037 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1038 StrData.asChar = AStrData;
1039 break;
1040 }
1041 case 2: {
1042 uint16_t *AStrData = new (C) uint16_t[Length];
1043 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1044 StrData.asUInt16 = AStrData;
1045 break;
1046 }
1047 case 4: {
1048 uint32_t *AStrData = new (C) uint32_t[Length];
1049 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1050 StrData.asUInt32 = AStrData;
1051 break;
1052 }
1053 default:
1054 llvm_unreachable("unsupported CharByteWidth")::llvm::llvm_unreachable_internal("unsupported CharByteWidth"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1054)
;
1055 }
1056}
1057
1058/// getLocationOfByte - Return a source location that points to the specified
1059/// byte of this string literal.
1060///
1061/// Strings are amazingly complex. They can be formed from multiple tokens and
1062/// can have escape sequences in them in addition to the usual trigraph and
1063/// escaped newline business. This routine handles this complexity.
1064///
1065/// The *StartToken sets the first token to be searched in this function and
1066/// the *StartTokenByteOffset is the byte offset of the first token. Before
1067/// returning, it updates the *StartToken to the TokNo of the token being found
1068/// and sets *StartTokenByteOffset to the byte offset of the token in the
1069/// string.
1070/// Using these two parameters can reduce the time complexity from O(n^2) to
1071/// O(n) if one wants to get the location of byte for all the tokens in a
1072/// string.
1073///
1074SourceLocation
1075StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1076 const LangOptions &Features,
1077 const TargetInfo &Target, unsigned *StartToken,
1078 unsigned *StartTokenByteOffset) const {
1079 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&(static_cast <bool> ((Kind == StringLiteral::Ascii || Kind
== StringLiteral::UTF8) && "Only narrow string literals are currently supported"
) ? void (0) : __assert_fail ("(Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1080, __extension__ __PRETTY_FUNCTION__))
1080 "Only narrow string literals are currently supported")(static_cast <bool> ((Kind == StringLiteral::Ascii || Kind
== StringLiteral::UTF8) && "Only narrow string literals are currently supported"
) ? void (0) : __assert_fail ("(Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1080, __extension__ __PRETTY_FUNCTION__))
;
1081
1082 // Loop over all of the tokens in this string until we find the one that
1083 // contains the byte we're looking for.
1084 unsigned TokNo = 0;
1085 unsigned StringOffset = 0;
1086 if (StartToken)
1087 TokNo = *StartToken;
1088 if (StartTokenByteOffset) {
1089 StringOffset = *StartTokenByteOffset;
1090 ByteNo -= StringOffset;
1091 }
1092 while (1) {
1093 assert(TokNo < getNumConcatenated() && "Invalid byte number!")(static_cast <bool> (TokNo < getNumConcatenated() &&
"Invalid byte number!") ? void (0) : __assert_fail ("TokNo < getNumConcatenated() && \"Invalid byte number!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1093, __extension__ __PRETTY_FUNCTION__))
;
1094 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1095
1096 // Get the spelling of the string so that we can get the data that makes up
1097 // the string literal, not the identifier for the macro it is potentially
1098 // expanded through.
1099 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1100
1101 // Re-lex the token to get its length and original spelling.
1102 std::pair<FileID, unsigned> LocInfo =
1103 SM.getDecomposedLoc(StrTokSpellingLoc);
1104 bool Invalid = false;
1105 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1106 if (Invalid) {
1107 if (StartTokenByteOffset != nullptr)
1108 *StartTokenByteOffset = StringOffset;
1109 if (StartToken != nullptr)
1110 *StartToken = TokNo;
1111 return StrTokSpellingLoc;
1112 }
1113
1114 const char *StrData = Buffer.data()+LocInfo.second;
1115
1116 // Create a lexer starting at the beginning of this token.
1117 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1118 Buffer.begin(), StrData, Buffer.end());
1119 Token TheTok;
1120 TheLexer.LexFromRawLexer(TheTok);
1121
1122 // Use the StringLiteralParser to compute the length of the string in bytes.
1123 StringLiteralParser SLP(TheTok, SM, Features, Target);
1124 unsigned TokNumBytes = SLP.GetStringLength();
1125
1126 // If the byte is in this token, return the location of the byte.
1127 if (ByteNo < TokNumBytes ||
1128 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1129 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1130
1131 // Now that we know the offset of the token in the spelling, use the
1132 // preprocessor to get the offset in the original source.
1133 if (StartTokenByteOffset != nullptr)
1134 *StartTokenByteOffset = StringOffset;
1135 if (StartToken != nullptr)
1136 *StartToken = TokNo;
1137 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1138 }
1139
1140 // Move to the next string token.
1141 StringOffset += TokNumBytes;
1142 ++TokNo;
1143 ByteNo -= TokNumBytes;
1144 }
1145}
1146
1147
1148
1149/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1150/// corresponds to, e.g. "sizeof" or "[pre]++".
1151StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1152 switch (Op) {
1153#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1154#include "clang/AST/OperationKinds.def"
1155 }
1156 llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1156)
;
1157}
1158
1159UnaryOperatorKind
1160UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1161 switch (OO) {
1162 default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1162)
;
1163 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1164 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1165 case OO_Amp: return UO_AddrOf;
1166 case OO_Star: return UO_Deref;
1167 case OO_Plus: return UO_Plus;
1168 case OO_Minus: return UO_Minus;
1169 case OO_Tilde: return UO_Not;
1170 case OO_Exclaim: return UO_LNot;
1171 case OO_Coawait: return UO_Coawait;
1172 }
1173}
1174
1175OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1176 switch (Opc) {
1177 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1178 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1179 case UO_AddrOf: return OO_Amp;
1180 case UO_Deref: return OO_Star;
1181 case UO_Plus: return OO_Plus;
1182 case UO_Minus: return OO_Minus;
1183 case UO_Not: return OO_Tilde;
1184 case UO_LNot: return OO_Exclaim;
1185 case UO_Coawait: return OO_Coawait;
1186 default: return OO_None;
1187 }
1188}
1189
1190
1191//===----------------------------------------------------------------------===//
1192// Postfix Operators.
1193//===----------------------------------------------------------------------===//
1194
1195CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1196 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
1197 ExprValueKind VK, SourceLocation rparenloc)
1198 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1199 fn->isValueDependent(), fn->isInstantiationDependent(),
1200 fn->containsUnexpandedParameterPack()),
1201 NumArgs(args.size()) {
1202
1203 unsigned NumPreArgs = preargs.size();
1204 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
1205 SubExprs[FN] = fn;
1206 for (unsigned i = 0; i != NumPreArgs; ++i) {
1207 updateDependenciesFromArg(preargs[i]);
1208 SubExprs[i+PREARGS_START] = preargs[i];
1209 }
1210 for (unsigned i = 0; i != args.size(); ++i) {
1211 updateDependenciesFromArg(args[i]);
1212 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1213 }
1214
1215 CallExprBits.NumPreArgs = NumPreArgs;
1216 RParenLoc = rparenloc;
1217}
1218
1219CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1220 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1221 SourceLocation rparenloc)
1222 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1223
1224CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1225 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1226 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1227}
1228
1229CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1230 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1231
1232CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1233 EmptyShell Empty)
1234 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1235 // FIXME: Why do we allocate this?
1236 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
1237 CallExprBits.NumPreArgs = NumPreArgs;
1238}
1239
1240void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1241 if (Arg->isTypeDependent())
1242 ExprBits.TypeDependent = true;
1243 if (Arg->isValueDependent())
1244 ExprBits.ValueDependent = true;
1245 if (Arg->isInstantiationDependent())
1246 ExprBits.InstantiationDependent = true;
1247 if (Arg->containsUnexpandedParameterPack())
1248 ExprBits.ContainsUnexpandedParameterPack = true;
1249}
1250
1251FunctionDecl *CallExpr::getDirectCallee() {
1252 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1253}
1254
1255Decl *CallExpr::getCalleeDecl() {
1256 return getCallee()->getReferencedDeclOfCallee();
1257}
1258
1259Decl *Expr::getReferencedDeclOfCallee() {
1260 Expr *CEE = IgnoreParenImpCasts();
1261
1262 while (SubstNonTypeTemplateParmExpr *NTTP
1263 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1264 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1265 }
1266
1267 // If we're calling a dereference, look at the pointer instead.
1268 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1269 if (BO->isPtrMemOp())
1270 CEE = BO->getRHS()->IgnoreParenCasts();
1271 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1272 if (UO->getOpcode() == UO_Deref)
1273 CEE = UO->getSubExpr()->IgnoreParenCasts();
1274 }
1275 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1276 return DRE->getDecl();
1277 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1278 return ME->getMemberDecl();
1279
1280 return nullptr;
1281}
1282
1283/// setNumArgs - This changes the number of arguments present in this call.
1284/// Any orphaned expressions are deleted by this, and any new operands are set
1285/// to null.
1286void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1287 // No change, just return.
1288 if (NumArgs == getNumArgs()) return;
1289
1290 // If shrinking # arguments, just delete the extras and forgot them.
1291 if (NumArgs < getNumArgs()) {
1292 this->NumArgs = NumArgs;
1293 return;
1294 }
1295
1296 // Otherwise, we are growing the # arguments. New an bigger argument array.
1297 unsigned NumPreArgs = getNumPreArgs();
1298 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1299 // Copy over args.
1300 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1301 NewSubExprs[i] = SubExprs[i];
1302 // Null out new args.
1303 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1304 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1305 NewSubExprs[i] = nullptr;
1306
1307 if (SubExprs) C.Deallocate(SubExprs);
1308 SubExprs = NewSubExprs;
1309 this->NumArgs = NumArgs;
1310}
1311
1312/// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1313/// not, return 0.
1314unsigned CallExpr::getBuiltinCallee() const {
1315 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1316 // function. As a result, we try and obtain the DeclRefExpr from the
1317 // ImplicitCastExpr.
1318 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1319 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1320 return 0;
1321
1322 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1323 if (!DRE)
1324 return 0;
1325
1326 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1327 if (!FDecl)
1328 return 0;
1329
1330 if (!FDecl->getIdentifier())
1331 return 0;
1332
1333 return FDecl->getBuiltinID();
1334}
1335
1336bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1337 if (unsigned BI = getBuiltinCallee())
1338 return Ctx.BuiltinInfo.isUnevaluated(BI);
1339 return false;
1340}
1341
1342QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1343 const Expr *Callee = getCallee();
1344 QualType CalleeType = Callee->getType();
1345 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1346 CalleeType = FnTypePtr->getPointeeType();
1347 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1348 CalleeType = BPT->getPointeeType();
1349 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1350 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1351 return Ctx.VoidTy;
1352
1353 // This should never be overloaded and so should never return null.
1354 CalleeType = Expr::findBoundMemberType(Callee);
1355 }
1356
1357 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1358 return FnType->getReturnType();
1359}
1360
1361SourceLocation CallExpr::getLocStart() const {
1362 if (isa<CXXOperatorCallExpr>(this))
1363 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1364
1365 SourceLocation begin = getCallee()->getLocStart();
1366 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1367 begin = getArg(0)->getLocStart();
1368 return begin;
1369}
1370SourceLocation CallExpr::getLocEnd() const {
1371 if (isa<CXXOperatorCallExpr>(this))
1372 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1373
1374 SourceLocation end = getRParenLoc();
1375 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1376 end = getArg(getNumArgs() - 1)->getLocEnd();
1377 return end;
1378}
1379
1380OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1381 SourceLocation OperatorLoc,
1382 TypeSourceInfo *tsi,
1383 ArrayRef<OffsetOfNode> comps,
1384 ArrayRef<Expr*> exprs,
1385 SourceLocation RParenLoc) {
1386 void *Mem = C.Allocate(
1387 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1388
1389 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1390 RParenLoc);
1391}
1392
1393OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1394 unsigned numComps, unsigned numExprs) {
1395 void *Mem =
1396 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1397 return new (Mem) OffsetOfExpr(numComps, numExprs);
1398}
1399
1400OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1401 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1402 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1403 SourceLocation RParenLoc)
1404 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1405 /*TypeDependent=*/false,
1406 /*ValueDependent=*/tsi->getType()->isDependentType(),
1407 tsi->getType()->isInstantiationDependentType(),
1408 tsi->getType()->containsUnexpandedParameterPack()),
1409 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1410 NumComps(comps.size()), NumExprs(exprs.size())
1411{
1412 for (unsigned i = 0; i != comps.size(); ++i) {
1413 setComponent(i, comps[i]);
1414 }
1415
1416 for (unsigned i = 0; i != exprs.size(); ++i) {
1417 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1418 ExprBits.ValueDependent = true;
1419 if (exprs[i]->containsUnexpandedParameterPack())
1420 ExprBits.ContainsUnexpandedParameterPack = true;
1421
1422 setIndexExpr(i, exprs[i]);
1423 }
1424}
1425
1426IdentifierInfo *OffsetOfNode::getFieldName() const {
1427 assert(getKind() == Field || getKind() == Identifier)(static_cast <bool> (getKind() == Field || getKind() ==
Identifier) ? void (0) : __assert_fail ("getKind() == Field || getKind() == Identifier"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1427, __extension__ __PRETTY_FUNCTION__))
;
1428 if (getKind() == Field)
1429 return getField()->getIdentifier();
1430
1431 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1432}
1433
1434UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1435 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1436 SourceLocation op, SourceLocation rp)
1437 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1438 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1439 // Value-dependent if the argument is type-dependent.
1440 E->isTypeDependent(), E->isInstantiationDependent(),
1441 E->containsUnexpandedParameterPack()),
1442 OpLoc(op), RParenLoc(rp) {
1443 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1444 UnaryExprOrTypeTraitExprBits.IsType = false;
1445 Argument.Ex = E;
1446
1447 // Check to see if we are in the situation where alignof(decl) should be
1448 // dependent because decl's alignment is dependent.
1449 if (ExprKind == UETT_AlignOf) {
1450 if (!isValueDependent() || !isInstantiationDependent()) {
1451 E = E->IgnoreParens();
1452
1453 const ValueDecl *D = nullptr;
1454 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1455 D = DRE->getDecl();
1456 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1457 D = ME->getMemberDecl();
1458
1459 if (D) {
1460 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1461 if (I->isAlignmentDependent()) {
1462 setValueDependent(true);
1463 setInstantiationDependent(true);
1464 break;
1465 }
1466 }
1467 }
1468 }
1469 }
1470}
1471
1472MemberExpr *MemberExpr::Create(
1473 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1474 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1475 ValueDecl *memberdecl, DeclAccessPair founddecl,
1476 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1477 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1478
1479 bool hasQualOrFound = (QualifierLoc ||
1480 founddecl.getDecl() != memberdecl ||
1481 founddecl.getAccess() != memberdecl->getAccess());
1482
1483 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1484 std::size_t Size =
1485 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1486 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1487 HasTemplateKWAndArgsInfo ? 1 : 0,
1488 targs ? targs->size() : 0);
1489
1490 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1491 MemberExpr *E = new (Mem)
1492 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1493
1494 if (hasQualOrFound) {
1495 // FIXME: Wrong. We should be looking at the member declaration we found.
1496 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1497 E->setValueDependent(true);
1498 E->setTypeDependent(true);
1499 E->setInstantiationDependent(true);
1500 }
1501 else if (QualifierLoc &&
1502 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1503 E->setInstantiationDependent(true);
1504
1505 E->HasQualifierOrFoundDecl = true;
1506
1507 MemberExprNameQualifier *NQ =
1508 E->getTrailingObjects<MemberExprNameQualifier>();
1509 NQ->QualifierLoc = QualifierLoc;
1510 NQ->FoundDecl = founddecl;
1511 }
1512
1513 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1514
1515 if (targs) {
1516 bool Dependent = false;
1517 bool InstantiationDependent = false;
1518 bool ContainsUnexpandedParameterPack = false;
1519 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1520 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1521 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1522 if (InstantiationDependent)
1523 E->setInstantiationDependent(true);
1524 } else if (TemplateKWLoc.isValid()) {
1525 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1526 TemplateKWLoc);
1527 }
1528
1529 return E;
1530}
1531
1532SourceLocation MemberExpr::getLocStart() const {
1533 if (isImplicitAccess()) {
1534 if (hasQualifier())
1535 return getQualifierLoc().getBeginLoc();
1536 return MemberLoc;
1537 }
1538
1539 // FIXME: We don't want this to happen. Rather, we should be able to
1540 // detect all kinds of implicit accesses more cleanly.
1541 SourceLocation BaseStartLoc = getBase()->getLocStart();
1542 if (BaseStartLoc.isValid())
1543 return BaseStartLoc;
1544 return MemberLoc;
1545}
1546SourceLocation MemberExpr::getLocEnd() const {
1547 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1548 if (hasExplicitTemplateArgs())
1549 EndLoc = getRAngleLoc();
1550 else if (EndLoc.isInvalid())
1551 EndLoc = getBase()->getLocEnd();
1552 return EndLoc;
1553}
1554
1555bool CastExpr::CastConsistency() const {
1556 switch (getCastKind()) {
1557 case CK_DerivedToBase:
1558 case CK_UncheckedDerivedToBase:
1559 case CK_DerivedToBaseMemberPointer:
1560 case CK_BaseToDerived:
1561 case CK_BaseToDerivedMemberPointer:
1562 assert(!path_empty() && "Cast kind should have a base path!")(static_cast <bool> (!path_empty() && "Cast kind should have a base path!"
) ? void (0) : __assert_fail ("!path_empty() && \"Cast kind should have a base path!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1562, __extension__ __PRETTY_FUNCTION__))
;
1563 break;
1564
1565 case CK_CPointerToObjCPointerCast:
1566 assert(getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
()) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1566, __extension__ __PRETTY_FUNCTION__))
;
1567 assert(getSubExpr()->getType()->isPointerType())(static_cast <bool> (getSubExpr()->getType()->isPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1567, __extension__ __PRETTY_FUNCTION__))
;
1568 goto CheckNoBasePath;
1569
1570 case CK_BlockPointerToObjCPointerCast:
1571 assert(getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
()) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1571, __extension__ __PRETTY_FUNCTION__))
;
1572 assert(getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1572, __extension__ __PRETTY_FUNCTION__))
;
1573 goto CheckNoBasePath;
1574
1575 case CK_ReinterpretMemberPointer:
1576 assert(getType()->isMemberPointerType())(static_cast <bool> (getType()->isMemberPointerType(
)) ? void (0) : __assert_fail ("getType()->isMemberPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1576, __extension__ __PRETTY_FUNCTION__))
;
1577 assert(getSubExpr()->getType()->isMemberPointerType())(static_cast <bool> (getSubExpr()->getType()->isMemberPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1577, __extension__ __PRETTY_FUNCTION__))
;
1578 goto CheckNoBasePath;
1579
1580 case CK_BitCast:
1581 // Arbitrary casts to C pointer types count as bitcasts.
1582 // Otherwise, we should only have block and ObjC pointer casts
1583 // here if they stay within the type kind.
1584 if (!getType()->isPointerType()) {
1585 assert(getType()->isObjCObjectPointerType() ==(static_cast <bool> (getType()->isObjCObjectPointerType
() == getSubExpr()->getType()->isObjCObjectPointerType(
)) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1586, __extension__ __PRETTY_FUNCTION__))
1586 getSubExpr()->getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
() == getSubExpr()->getType()->isObjCObjectPointerType(
)) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1586, __extension__ __PRETTY_FUNCTION__))
;
1587 assert(getType()->isBlockPointerType() ==(static_cast <bool> (getType()->isBlockPointerType()
== getSubExpr()->getType()->isBlockPointerType()) ? void
(0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1588, __extension__ __PRETTY_FUNCTION__))
1588 getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
== getSubExpr()->getType()->isBlockPointerType()) ? void
(0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1588, __extension__ __PRETTY_FUNCTION__))
;
1589 }
1590 goto CheckNoBasePath;
1591
1592 case CK_AnyPointerToBlockPointerCast:
1593 assert(getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
) ? void (0) : __assert_fail ("getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1593, __extension__ __PRETTY_FUNCTION__))
;
1594 assert(getSubExpr()->getType()->isAnyPointerType() &&(static_cast <bool> (getSubExpr()->getType()->isAnyPointerType
() && !getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1595, __extension__ __PRETTY_FUNCTION__))
1595 !getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isAnyPointerType
() && !getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1595, __extension__ __PRETTY_FUNCTION__))
;
1596 goto CheckNoBasePath;
1597
1598 case CK_CopyAndAutoreleaseBlockObject:
1599 assert(getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
) ? void (0) : __assert_fail ("getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1599, __extension__ __PRETTY_FUNCTION__))
;
1600 assert(getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1600, __extension__ __PRETTY_FUNCTION__))
;
1601 goto CheckNoBasePath;
1602
1603 case CK_FunctionToPointerDecay:
1604 assert(getType()->isPointerType())(static_cast <bool> (getType()->isPointerType()) ? void
(0) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1604, __extension__ __PRETTY_FUNCTION__))
;
1605 assert(getSubExpr()->getType()->isFunctionType())(static_cast <bool> (getSubExpr()->getType()->isFunctionType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1605, __extension__ __PRETTY_FUNCTION__))
;
1606 goto CheckNoBasePath;
1607
1608 case CK_AddressSpaceConversion:
1609 assert(getType()->isPointerType() || getType()->isBlockPointerType())(static_cast <bool> (getType()->isPointerType() || getType
()->isBlockPointerType()) ? void (0) : __assert_fail ("getType()->isPointerType() || getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1609, __extension__ __PRETTY_FUNCTION__))
;
1610 assert(getSubExpr()->getType()->isPointerType() ||(static_cast <bool> (getSubExpr()->getType()->isPointerType
() || getSubExpr()->getType()->isBlockPointerType()) ? void
(0) : __assert_fail ("getSubExpr()->getType()->isPointerType() || getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1611, __extension__ __PRETTY_FUNCTION__))
1611 getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isPointerType
() || getSubExpr()->getType()->isBlockPointerType()) ? void
(0) : __assert_fail ("getSubExpr()->getType()->isPointerType() || getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1611, __extension__ __PRETTY_FUNCTION__))
;
1612 assert(getType()->getPointeeType().getAddressSpace() !=(static_cast <bool> (getType()->getPointeeType().getAddressSpace
() != getSubExpr()->getType()->getPointeeType().getAddressSpace
()) ? void (0) : __assert_fail ("getType()->getPointeeType().getAddressSpace() != getSubExpr()->getType()->getPointeeType().getAddressSpace()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1613, __extension__ __PRETTY_FUNCTION__))
1613 getSubExpr()->getType()->getPointeeType().getAddressSpace())(static_cast <bool> (getType()->getPointeeType().getAddressSpace
() != getSubExpr()->getType()->getPointeeType().getAddressSpace
()) ? void (0) : __assert_fail ("getType()->getPointeeType().getAddressSpace() != getSubExpr()->getType()->getPointeeType().getAddressSpace()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1613, __extension__ __PRETTY_FUNCTION__))
;
1614 LLVM_FALLTHROUGH[[clang::fallthrough]];
1615 // These should not have an inheritance path.
1616 case CK_Dynamic:
1617 case CK_ToUnion:
1618 case CK_ArrayToPointerDecay:
1619 case CK_NullToMemberPointer:
1620 case CK_NullToPointer:
1621 case CK_ConstructorConversion:
1622 case CK_IntegralToPointer:
1623 case CK_PointerToIntegral:
1624 case CK_ToVoid:
1625 case CK_VectorSplat:
1626 case CK_IntegralCast:
1627 case CK_BooleanToSignedIntegral:
1628 case CK_IntegralToFloating:
1629 case CK_FloatingToIntegral:
1630 case CK_FloatingCast:
1631 case CK_ObjCObjectLValueCast:
1632 case CK_FloatingRealToComplex:
1633 case CK_FloatingComplexToReal:
1634 case CK_FloatingComplexCast:
1635 case CK_FloatingComplexToIntegralComplex:
1636 case CK_IntegralRealToComplex:
1637 case CK_IntegralComplexToReal:
1638 case CK_IntegralComplexCast:
1639 case CK_IntegralComplexToFloatingComplex:
1640 case CK_ARCProduceObject:
1641 case CK_ARCConsumeObject:
1642 case CK_ARCReclaimReturnedObject:
1643 case CK_ARCExtendBlockObject:
1644 case CK_ZeroToOCLEvent:
1645 case CK_ZeroToOCLQueue:
1646 case CK_IntToOCLSampler:
1647 assert(!getType()->isBooleanType() && "unheralded conversion to bool")(static_cast <bool> (!getType()->isBooleanType() &&
"unheralded conversion to bool") ? void (0) : __assert_fail (
"!getType()->isBooleanType() && \"unheralded conversion to bool\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1647, __extension__ __PRETTY_FUNCTION__))
;
1648 goto CheckNoBasePath;
1649
1650 case CK_Dependent:
1651 case CK_LValueToRValue:
1652 case CK_NoOp:
1653 case CK_AtomicToNonAtomic:
1654 case CK_NonAtomicToAtomic:
1655 case CK_PointerToBoolean:
1656 case CK_IntegralToBoolean:
1657 case CK_FloatingToBoolean:
1658 case CK_MemberPointerToBoolean:
1659 case CK_FloatingComplexToBoolean:
1660 case CK_IntegralComplexToBoolean:
1661 case CK_LValueBitCast: // -> bool&
1662 case CK_UserDefinedConversion: // operator bool()
1663 case CK_BuiltinFnToFnPtr:
1664 CheckNoBasePath:
1665 assert(path_empty() && "Cast kind should not have a base path!")(static_cast <bool> (path_empty() && "Cast kind should not have a base path!"
) ? void (0) : __assert_fail ("path_empty() && \"Cast kind should not have a base path!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1665, __extension__ __PRETTY_FUNCTION__))
;
1666 break;
1667 }
1668 return true;
1669}
1670
1671const char *CastExpr::getCastKindName(CastKind CK) {
1672 switch (CK) {
1673#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1674#include "clang/AST/OperationKinds.def"
1675 }
1676 llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1676)
;
1677}
1678
1679namespace {
1680 const Expr *skipImplicitTemporary(const Expr *E) {
1681 // Skip through reference binding to temporary.
1682 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1683 E = Materialize->GetTemporaryExpr();
1684
1685 // Skip any temporary bindings; they're implicit.
1686 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1687 E = Binder->getSubExpr();
1688
1689 return E;
1690 }
1691}
1692
1693Expr *CastExpr::getSubExprAsWritten() {
1694 const Expr *SubExpr = nullptr;
1695 const CastExpr *E = this;
1696 do {
1697 SubExpr = skipImplicitTemporary(E->getSubExpr());
1698
1699 // Conversions by constructor and conversion functions have a
1700 // subexpression describing the call; strip it off.
1701 if (E->getCastKind() == CK_ConstructorConversion)
1702 SubExpr =
1703 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
1704 else if (E->getCastKind() == CK_UserDefinedConversion) {
1705 assert((isa<CXXMemberCallExpr>(SubExpr) ||(static_cast <bool> ((isa<CXXMemberCallExpr>(SubExpr
) || isa<BlockExpr>(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? void (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1707, __extension__ __PRETTY_FUNCTION__))
1706 isa<BlockExpr>(SubExpr)) &&(static_cast <bool> ((isa<CXXMemberCallExpr>(SubExpr
) || isa<BlockExpr>(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? void (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1707, __extension__ __PRETTY_FUNCTION__))
1707 "Unexpected SubExpr for CK_UserDefinedConversion.")(static_cast <bool> ((isa<CXXMemberCallExpr>(SubExpr
) || isa<BlockExpr>(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? void (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1707, __extension__ __PRETTY_FUNCTION__))
;
1708 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1709 SubExpr = MCE->getImplicitObjectArgument();
1710 }
1711
1712 // If the subexpression we're left with is an implicit cast, look
1713 // through that, too.
1714 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1715
1716 return const_cast<Expr*>(SubExpr);
1717}
1718
1719NamedDecl *CastExpr::getConversionFunction() const {
1720 const Expr *SubExpr = nullptr;
1721
1722 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1723 SubExpr = skipImplicitTemporary(E->getSubExpr());
1724
1725 if (E->getCastKind() == CK_ConstructorConversion)
1726 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1727
1728 if (E->getCastKind() == CK_UserDefinedConversion) {
1729 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1730 return MCE->getMethodDecl();
1731 }
1732 }
1733
1734 return nullptr;
1735}
1736
1737CXXBaseSpecifier **CastExpr::path_buffer() {
1738 switch (getStmtClass()) {
1739#define ABSTRACT_STMT(x)
1740#define CASTEXPR(Type, Base) \
1741 case Stmt::Type##Class: \
1742 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1743#define STMT(Type, Base)
1744#include "clang/AST/StmtNodes.inc"
1745 default:
1746 llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1746)
;
1747 }
1748}
1749
1750const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1751 QualType opType) {
1752 auto RD = unionType->castAs<RecordType>()->getDecl();
1753 return getTargetFieldForToUnionCast(RD, opType);
1754}
1755
1756const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1757 QualType OpType) {
1758 auto &Ctx = RD->getASTContext();
1759 RecordDecl::field_iterator Field, FieldEnd;
1760 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1761 Field != FieldEnd; ++Field) {
1762 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1763 !Field->isUnnamedBitfield()) {
1764 return *Field;
1765 }
1766 }
1767 return nullptr;
1768}
1769
1770ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1771 CastKind Kind, Expr *Operand,
1772 const CXXCastPath *BasePath,
1773 ExprValueKind VK) {
1774 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1775 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1776 ImplicitCastExpr *E =
1777 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1778 if (PathSize)
1779 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1780 E->getTrailingObjects<CXXBaseSpecifier *>());
1781 return E;
1782}
1783
1784ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1785 unsigned PathSize) {
1786 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1787 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1788}
1789
1790
1791CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1792 ExprValueKind VK, CastKind K, Expr *Op,
1793 const CXXCastPath *BasePath,
1794 TypeSourceInfo *WrittenTy,
1795 SourceLocation L, SourceLocation R) {
1796 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1797 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1798 CStyleCastExpr *E =
1799 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1800 if (PathSize)
1801 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1802 E->getTrailingObjects<CXXBaseSpecifier *>());
1803 return E;
1804}
1805
1806CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1807 unsigned PathSize) {
1808 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1809 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1810}
1811
1812/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1813/// corresponds to, e.g. "<<=".
1814StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1815 switch (Op) {
1816#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1817#include "clang/AST/OperationKinds.def"
1818 }
1819 llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1819)
;
1820}
1821
1822BinaryOperatorKind
1823BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1824 switch (OO) {
1825 default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1825)
;
1826 case OO_Plus: return BO_Add;
1827 case OO_Minus: return BO_Sub;
1828 case OO_Star: return BO_Mul;
1829 case OO_Slash: return BO_Div;
1830 case OO_Percent: return BO_Rem;
1831 case OO_Caret: return BO_Xor;
1832 case OO_Amp: return BO_And;
1833 case OO_Pipe: return BO_Or;
1834 case OO_Equal: return BO_Assign;
1835 case OO_Spaceship: return BO_Cmp;
1836 case OO_Less: return BO_LT;
1837 case OO_Greater: return BO_GT;
1838 case OO_PlusEqual: return BO_AddAssign;
1839 case OO_MinusEqual: return BO_SubAssign;
1840 case OO_StarEqual: return BO_MulAssign;
1841 case OO_SlashEqual: return BO_DivAssign;
1842 case OO_PercentEqual: return BO_RemAssign;
1843 case OO_CaretEqual: return BO_XorAssign;
1844 case OO_AmpEqual: return BO_AndAssign;
1845 case OO_PipeEqual: return BO_OrAssign;
1846 case OO_LessLess: return BO_Shl;
1847 case OO_GreaterGreater: return BO_Shr;
1848 case OO_LessLessEqual: return BO_ShlAssign;
1849 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1850 case OO_EqualEqual: return BO_EQ;
1851 case OO_ExclaimEqual: return BO_NE;
1852 case OO_LessEqual: return BO_LE;
1853 case OO_GreaterEqual: return BO_GE;
1854 case OO_AmpAmp: return BO_LAnd;
1855 case OO_PipePipe: return BO_LOr;
1856 case OO_Comma: return BO_Comma;
1857 case OO_ArrowStar: return BO_PtrMemI;
1858 }
1859}
1860
1861OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1862 static const OverloadedOperatorKind OverOps[] = {
1863 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1864 OO_Star, OO_Slash, OO_Percent,
1865 OO_Plus, OO_Minus,
1866 OO_LessLess, OO_GreaterGreater,
1867 OO_Spaceship,
1868 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1869 OO_EqualEqual, OO_ExclaimEqual,
1870 OO_Amp,
1871 OO_Caret,
1872 OO_Pipe,
1873 OO_AmpAmp,
1874 OO_PipePipe,
1875 OO_Equal, OO_StarEqual,
1876 OO_SlashEqual, OO_PercentEqual,
1877 OO_PlusEqual, OO_MinusEqual,
1878 OO_LessLessEqual, OO_GreaterGreaterEqual,
1879 OO_AmpEqual, OO_CaretEqual,
1880 OO_PipeEqual,
1881 OO_Comma
1882 };
1883 return OverOps[Opc];
1884}
1885
1886bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
1887 Opcode Opc,
1888 Expr *LHS, Expr *RHS) {
1889 if (Opc != BO_Add)
1890 return false;
1891
1892 // Check that we have one pointer and one integer operand.
1893 Expr *PExp;
1894 if (LHS->getType()->isPointerType()) {
1895 if (!RHS->getType()->isIntegerType())
1896 return false;
1897 PExp = LHS;
1898 } else if (RHS->getType()->isPointerType()) {
1899 if (!LHS->getType()->isIntegerType())
1900 return false;
1901 PExp = RHS;
1902 } else {
1903 return false;
1904 }
1905
1906 // Check that the pointer is a nullptr.
1907 if (!PExp->IgnoreParenCasts()
1908 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
1909 return false;
1910
1911 // Check that the pointee type is char-sized.
1912 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
1913 if (!PTy || !PTy->getPointeeType()->isCharType())
1914 return false;
1915
1916 return true;
1917}
1918InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1919 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1920 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1921 false, false),
1922 InitExprs(C, initExprs.size()),
1923 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1924{
1925 sawArrayRangeDesignator(false);
1926 for (unsigned I = 0; I != initExprs.size(); ++I) {
1927 if (initExprs[I]->isTypeDependent())
1928 ExprBits.TypeDependent = true;
1929 if (initExprs[I]->isValueDependent())
1930 ExprBits.ValueDependent = true;
1931 if (initExprs[I]->isInstantiationDependent())
1932 ExprBits.InstantiationDependent = true;
1933 if (initExprs[I]->containsUnexpandedParameterPack())
1934 ExprBits.ContainsUnexpandedParameterPack = true;
1935 }
1936
1937 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1938}
1939
1940void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1941 if (NumInits > InitExprs.size())
1942 InitExprs.reserve(C, NumInits);
1943}
1944
1945void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1946 InitExprs.resize(C, NumInits, nullptr);
1947}
1948
1949Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1950 if (Init >= InitExprs.size()) {
1951 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1952 setInit(Init, expr);
1953 return nullptr;
1954 }
1955
1956 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1957 setInit(Init, expr);
1958 return Result;
1959}
1960
1961void InitListExpr::setArrayFiller(Expr *filler) {
1962 assert(!hasArrayFiller() && "Filler already set!")(static_cast <bool> (!hasArrayFiller() && "Filler already set!"
) ? void (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1962, __extension__ __PRETTY_FUNCTION__))
;
1963 ArrayFillerOrUnionFieldInit = filler;
1964 // Fill out any "holes" in the array due to designated initializers.
1965 Expr **inits = getInits();
1966 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1967 if (inits[i] == nullptr)
1968 inits[i] = filler;
1969}
1970
1971bool InitListExpr::isStringLiteralInit() const {
1972 if (getNumInits() != 1)
1973 return false;
1974 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1975 if (!AT || !AT->getElementType()->isIntegerType())
1976 return false;
1977 // It is possible for getInit() to return null.
1978 const Expr *Init = getInit(0);
1979 if (!Init)
1980 return false;
1981 Init = Init->IgnoreParens();
1982 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
1983}
1984
1985bool InitListExpr::isTransparent() const {
1986 assert(isSemanticForm() && "syntactic form never semantically transparent")(static_cast <bool> (isSemanticForm() && "syntactic form never semantically transparent"
) ? void (0) : __assert_fail ("isSemanticForm() && \"syntactic form never semantically transparent\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1986, __extension__ __PRETTY_FUNCTION__))
;
1987
1988 // A glvalue InitListExpr is always just sugar.
1989 if (isGLValue()) {
1990 assert(getNumInits() == 1 && "multiple inits in glvalue init list")(static_cast <bool> (getNumInits() == 1 && "multiple inits in glvalue init list"
) ? void (0) : __assert_fail ("getNumInits() == 1 && \"multiple inits in glvalue init list\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 1990, __extension__ __PRETTY_FUNCTION__))
;
1991 return true;
1992 }
1993
1994 // Otherwise, we're sugar if and only if we have exactly one initializer that
1995 // is of the same type.
1996 if (getNumInits() != 1 || !getInit(0))
1997 return false;
1998
1999 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2000 // transparent struct copy.
2001 if (!getInit(0)->isRValue() && getType()->isRecordType())
2002 return false;
2003
2004 return getType().getCanonicalType() ==
2005 getInit(0)->getType().getCanonicalType();
2006}
2007
2008bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2009 assert(isSyntacticForm() && "only test syntactic form as zero initializer")(static_cast <bool> (isSyntacticForm() && "only test syntactic form as zero initializer"
) ? void (0) : __assert_fail ("isSyntacticForm() && \"only test syntactic form as zero initializer\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2009, __extension__ __PRETTY_FUNCTION__))
;
2010
2011 if (LangOpts.CPlusPlus || getNumInits() != 1) {
2012 return false;
2013 }
2014
2015 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0));
2016 return Lit && Lit->getValue() == 0;
2017}
2018
2019SourceLocation InitListExpr::getLocStart() const {
2020 if (InitListExpr *SyntacticForm = getSyntacticForm())
2021 return SyntacticForm->getLocStart();
2022 SourceLocation Beg = LBraceLoc;
2023 if (Beg.isInvalid()) {
2024 // Find the first non-null initializer.
2025 for (InitExprsTy::const_iterator I = InitExprs.begin(),
2026 E = InitExprs.end();
2027 I != E; ++I) {
2028 if (Stmt *S = *I) {
2029 Beg = S->getLocStart();
2030 break;
2031 }
2032 }
2033 }
2034 return Beg;
2035}
2036
2037SourceLocation InitListExpr::getLocEnd() const {
2038 if (InitListExpr *SyntacticForm = getSyntacticForm())
2039 return SyntacticForm->getLocEnd();
2040 SourceLocation End = RBraceLoc;
2041 if (End.isInvalid()) {
2042 // Find the first non-null initializer from the end.
2043 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2044 E = InitExprs.rend();
2045 I != E; ++I) {
2046 if (Stmt *S = *I) {
2047 End = S->getLocEnd();
2048 break;
2049 }
2050 }
2051 }
2052 return End;
2053}
2054
2055/// getFunctionType - Return the underlying function type for this block.
2056///
2057const FunctionProtoType *BlockExpr::getFunctionType() const {
2058 // The block pointer is never sugared, but the function type might be.
2059 return cast<BlockPointerType>(getType())
2060 ->getPointeeType()->castAs<FunctionProtoType>();
2061}
2062
2063SourceLocation BlockExpr::getCaretLocation() const {
2064 return TheBlock->getCaretLocation();
2065}
2066const Stmt *BlockExpr::getBody() const {
2067 return TheBlock->getBody();
2068}
2069Stmt *BlockExpr::getBody() {
2070 return TheBlock->getBody();
2071}
2072
2073
2074//===----------------------------------------------------------------------===//
2075// Generic Expression Routines
2076//===----------------------------------------------------------------------===//
2077
2078/// isUnusedResultAWarning - Return true if this immediate expression should
2079/// be warned about if the result is unused. If so, fill in Loc and Ranges
2080/// with location to warn on and the source range[s] to report with the
2081/// warning.
2082bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2083 SourceRange &R1, SourceRange &R2,
2084 ASTContext &Ctx) const {
2085 // Don't warn if the expr is type dependent. The type could end up
2086 // instantiating to void.
2087 if (isTypeDependent())
2088 return false;
2089
2090 switch (getStmtClass()) {
2091 default:
2092 if (getType()->isVoidType())
2093 return false;
2094 WarnE = this;
2095 Loc = getExprLoc();
2096 R1 = getSourceRange();
2097 return true;
2098 case ParenExprClass:
2099 return cast<ParenExpr>(this)->getSubExpr()->
2100 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2101 case GenericSelectionExprClass:
2102 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2103 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2104 case CoawaitExprClass:
2105 case CoyieldExprClass:
2106 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
2107 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2108 case ChooseExprClass:
2109 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2110 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2111 case UnaryOperatorClass: {
2112 const UnaryOperator *UO = cast<UnaryOperator>(this);
2113
2114 switch (UO->getOpcode()) {
2115 case UO_Plus:
2116 case UO_Minus:
2117 case UO_AddrOf:
2118 case UO_Not:
2119 case UO_LNot:
2120 case UO_Deref:
2121 break;
2122 case UO_Coawait:
2123 // This is just the 'operator co_await' call inside the guts of a
2124 // dependent co_await call.
2125 case UO_PostInc:
2126 case UO_PostDec:
2127 case UO_PreInc:
2128 case UO_PreDec: // ++/--
2129 return false; // Not a warning.
2130 case UO_Real:
2131 case UO_Imag:
2132 // accessing a piece of a volatile complex is a side-effect.
2133 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2134 .isVolatileQualified())
2135 return false;
2136 break;
2137 case UO_Extension:
2138 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2139 }
2140 WarnE = this;
2141 Loc = UO->getOperatorLoc();
2142 R1 = UO->getSubExpr()->getSourceRange();
2143 return true;
2144 }
2145 case BinaryOperatorClass: {
2146 const BinaryOperator *BO = cast<BinaryOperator>(this);
2147 switch (BO->getOpcode()) {
2148 default:
2149 break;
2150 // Consider the RHS of comma for side effects. LHS was checked by
2151 // Sema::CheckCommaOperands.
2152 case BO_Comma:
2153 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2154 // lvalue-ness) of an assignment written in a macro.
2155 if (IntegerLiteral *IE =
2156 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2157 if (IE->getValue() == 0)
2158 return false;
2159 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2160 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2161 case BO_LAnd:
2162 case BO_LOr:
2163 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2164 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2165 return false;
2166 break;
2167 }
2168 if (BO->isAssignmentOp())
2169 return false;
2170 WarnE = this;
2171 Loc = BO->getOperatorLoc();
2172 R1 = BO->getLHS()->getSourceRange();
2173 R2 = BO->getRHS()->getSourceRange();
2174 return true;
2175 }
2176 case CompoundAssignOperatorClass:
2177 case VAArgExprClass:
2178 case AtomicExprClass:
2179 return false;
2180
2181 case ConditionalOperatorClass: {
2182 // If only one of the LHS or RHS is a warning, the operator might
2183 // be being used for control flow. Only warn if both the LHS and
2184 // RHS are warnings.
2185 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2186 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2187 return false;
2188 if (!Exp->getLHS())
2189 return true;
2190 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2191 }
2192
2193 case MemberExprClass:
2194 WarnE = this;
2195 Loc = cast<MemberExpr>(this)->getMemberLoc();
2196 R1 = SourceRange(Loc, Loc);
2197 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2198 return true;
2199
2200 case ArraySubscriptExprClass:
2201 WarnE = this;
2202 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2203 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2204 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2205 return true;
2206
2207 case CXXOperatorCallExprClass: {
2208 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2209 // overloads as there is no reasonable way to define these such that they
2210 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2211 // warning: operators == and != are commonly typo'ed, and so warning on them
2212 // provides additional value as well. If this list is updated,
2213 // DiagnoseUnusedComparison should be as well.
2214 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2215 switch (Op->getOperator()) {
2216 default:
2217 break;
2218 case OO_EqualEqual:
2219 case OO_ExclaimEqual:
2220 case OO_Less:
2221 case OO_Greater:
2222 case OO_GreaterEqual:
2223 case OO_LessEqual:
2224 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2225 Op->getCallReturnType(Ctx)->isVoidType())
2226 break;
2227 WarnE = this;
2228 Loc = Op->getOperatorLoc();
2229 R1 = Op->getSourceRange();
2230 return true;
2231 }
2232
2233 // Fallthrough for generic call handling.
2234 LLVM_FALLTHROUGH[[clang::fallthrough]];
2235 }
2236 case CallExprClass:
2237 case CXXMemberCallExprClass:
2238 case UserDefinedLiteralClass: {
2239 // If this is a direct call, get the callee.
2240 const CallExpr *CE = cast<CallExpr>(this);
2241 if (const Decl *FD = CE->getCalleeDecl()) {
2242 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2243 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2244 : FD->hasAttr<WarnUnusedResultAttr>();
2245
2246 // If the callee has attribute pure, const, or warn_unused_result, warn
2247 // about it. void foo() { strlen("bar"); } should warn.
2248 //
2249 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2250 // updated to match for QoI.
2251 if (HasWarnUnusedResultAttr ||
2252 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2253 WarnE = this;
2254 Loc = CE->getCallee()->getLocStart();
2255 R1 = CE->getCallee()->getSourceRange();
2256
2257 if (unsigned NumArgs = CE->getNumArgs())
2258 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2259 CE->getArg(NumArgs-1)->getLocEnd());
2260 return true;
2261 }
2262 }
2263 return false;
2264 }
2265
2266 // If we don't know precisely what we're looking at, let's not warn.
2267 case UnresolvedLookupExprClass:
2268 case CXXUnresolvedConstructExprClass:
2269 return false;
2270
2271 case CXXTemporaryObjectExprClass:
2272 case CXXConstructExprClass: {
2273 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2274 if (Type->hasAttr<WarnUnusedAttr>()) {
2275 WarnE = this;
2276 Loc = getLocStart();
2277 R1 = getSourceRange();
2278 return true;
2279 }
2280 }
2281 return false;
2282 }
2283
2284 case ObjCMessageExprClass: {
2285 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2286 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2287 ME->isInstanceMessage() &&
2288 !ME->getType()->isVoidType() &&
2289 ME->getMethodFamily() == OMF_init) {
2290 WarnE = this;
2291 Loc = getExprLoc();
2292 R1 = ME->getSourceRange();
2293 return true;
2294 }
2295
2296 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2297 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2298 WarnE = this;
2299 Loc = getExprLoc();
2300 return true;
2301 }
2302
2303 return false;
2304 }
2305
2306 case ObjCPropertyRefExprClass:
2307 WarnE = this;
2308 Loc = getExprLoc();
2309 R1 = getSourceRange();
2310 return true;
2311
2312 case PseudoObjectExprClass: {
2313 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2314
2315 // Only complain about things that have the form of a getter.
2316 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2317 isa<BinaryOperator>(PO->getSyntacticForm()))
2318 return false;
2319
2320 WarnE = this;
2321 Loc = getExprLoc();
2322 R1 = getSourceRange();
2323 return true;
2324 }
2325
2326 case StmtExprClass: {
2327 // Statement exprs don't logically have side effects themselves, but are
2328 // sometimes used in macros in ways that give them a type that is unused.
2329 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2330 // however, if the result of the stmt expr is dead, we don't want to emit a
2331 // warning.
2332 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2333 if (!CS->body_empty()) {
2334 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2335 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2336 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2337 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2338 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2339 }
2340
2341 if (getType()->isVoidType())
2342 return false;
2343 WarnE = this;
2344 Loc = cast<StmtExpr>(this)->getLParenLoc();
2345 R1 = getSourceRange();
2346 return true;
2347 }
2348 case CXXFunctionalCastExprClass:
2349 case CStyleCastExprClass: {
2350 // Ignore an explicit cast to void unless the operand is a non-trivial
2351 // volatile lvalue.
2352 const CastExpr *CE = cast<CastExpr>(this);
2353 if (CE->getCastKind() == CK_ToVoid) {
2354 if (CE->getSubExpr()->isGLValue() &&
2355 CE->getSubExpr()->getType().isVolatileQualified()) {
2356 const DeclRefExpr *DRE =
2357 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2358 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2359 cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
2360 !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
2361 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2362 R1, R2, Ctx);
2363 }
2364 }
2365 return false;
2366 }
2367
2368 // If this is a cast to a constructor conversion, check the operand.
2369 // Otherwise, the result of the cast is unused.
2370 if (CE->getCastKind() == CK_ConstructorConversion)
2371 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2372
2373 WarnE = this;
2374 if (const CXXFunctionalCastExpr *CXXCE =
2375 dyn_cast<CXXFunctionalCastExpr>(this)) {
2376 Loc = CXXCE->getLocStart();
2377 R1 = CXXCE->getSubExpr()->getSourceRange();
2378 } else {
2379 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2380 Loc = CStyleCE->getLParenLoc();
2381 R1 = CStyleCE->getSubExpr()->getSourceRange();
2382 }
2383 return true;
2384 }
2385 case ImplicitCastExprClass: {
2386 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2387
2388 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2389 if (ICE->getCastKind() == CK_LValueToRValue &&
2390 ICE->getSubExpr()->getType().isVolatileQualified())
2391 return false;
2392
2393 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2394 }
2395 case CXXDefaultArgExprClass:
2396 return (cast<CXXDefaultArgExpr>(this)
2397 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2398 case CXXDefaultInitExprClass:
2399 return (cast<CXXDefaultInitExpr>(this)
2400 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2401
2402 case CXXNewExprClass:
2403 // FIXME: In theory, there might be new expressions that don't have side
2404 // effects (e.g. a placement new with an uninitialized POD).
2405 case CXXDeleteExprClass:
2406 return false;
2407 case MaterializeTemporaryExprClass:
2408 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2409 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2410 case CXXBindTemporaryExprClass:
2411 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2412 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2413 case ExprWithCleanupsClass:
2414 return cast<ExprWithCleanups>(this)->getSubExpr()
2415 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2416 }
2417}
2418
2419/// isOBJCGCCandidate - Check if an expression is objc gc'able.
2420/// returns true, if it is; false otherwise.
2421bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2422 const Expr *E = IgnoreParens();
2423 switch (E->getStmtClass()) {
2424 default:
2425 return false;
2426 case ObjCIvarRefExprClass:
2427 return true;
2428 case Expr::UnaryOperatorClass:
2429 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2430 case ImplicitCastExprClass:
2431 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2432 case MaterializeTemporaryExprClass:
2433 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2434 ->isOBJCGCCandidate(Ctx);
2435 case CStyleCastExprClass:
2436 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2437 case DeclRefExprClass: {
2438 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2439
2440 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2441 if (VD->hasGlobalStorage())
2442 return true;
2443 QualType T = VD->getType();
2444 // dereferencing to a pointer is always a gc'able candidate,
2445 // unless it is __weak.
2446 return T->isPointerType() &&
2447 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2448 }
2449 return false;
2450 }
2451 case MemberExprClass: {
2452 const MemberExpr *M = cast<MemberExpr>(E);
2453 return M->getBase()->isOBJCGCCandidate(Ctx);
2454 }
2455 case ArraySubscriptExprClass:
2456 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2457 }
2458}
2459
2460bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2461 if (isTypeDependent())
2462 return false;
2463 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2464}
2465
2466QualType Expr::findBoundMemberType(const Expr *expr) {
2467 assert(expr->hasPlaceholderType(BuiltinType::BoundMember))(static_cast <bool> (expr->hasPlaceholderType(BuiltinType
::BoundMember)) ? void (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2467, __extension__ __PRETTY_FUNCTION__))
;
2468
2469 // Bound member expressions are always one of these possibilities:
2470 // x->m x.m x->*y x.*y
2471 // (possibly parenthesized)
2472
2473 expr = expr->IgnoreParens();
2474 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2475 assert(isa<CXXMethodDecl>(mem->getMemberDecl()))(static_cast <bool> (isa<CXXMethodDecl>(mem->getMemberDecl
())) ? void (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2475, __extension__ __PRETTY_FUNCTION__))
;
2476 return mem->getMemberDecl()->getType();
2477 }
2478
2479 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2480 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2481 ->getPointeeType();
2482 assert(type->isFunctionType())(static_cast <bool> (type->isFunctionType()) ? void (
0) : __assert_fail ("type->isFunctionType()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2482, __extension__ __PRETTY_FUNCTION__))
;
2483 return type;
2484 }
2485
2486 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr))(static_cast <bool> (isa<UnresolvedMemberExpr>(expr
) || isa<CXXPseudoDestructorExpr>(expr)) ? void (0) : __assert_fail
("isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr)"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2486, __extension__ __PRETTY_FUNCTION__))
;
2487 return QualType();
2488}
2489
2490Expr* Expr::IgnoreParens() {
2491 Expr* E = this;
2492 while (true) {
2493 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2494 E = P->getSubExpr();
2495 continue;
2496 }
2497 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2498 if (P->getOpcode() == UO_Extension) {
2499 E = P->getSubExpr();
2500 continue;
2501 }
2502 }
2503 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2504 if (!P->isResultDependent()) {
2505 E = P->getResultExpr();
2506 continue;
2507 }
2508 }
2509 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2510 if (!P->isConditionDependent()) {
2511 E = P->getChosenSubExpr();
2512 continue;
2513 }
2514 }
2515 return E;
2516 }
2517}
2518
2519/// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2520/// or CastExprs or ImplicitCastExprs, returning their operand.
2521Expr *Expr::IgnoreParenCasts() {
2522 Expr *E = this;
2523 while (true) {
2524 E = E->IgnoreParens();
2525 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2526 E = P->getSubExpr();
2527 continue;
2528 }
2529 if (MaterializeTemporaryExpr *Materialize
2530 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2531 E = Materialize->GetTemporaryExpr();
2532 continue;
2533 }
2534 if (SubstNonTypeTemplateParmExpr *NTTP
2535 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2536 E = NTTP->getReplacement();
2537 continue;
2538 }
2539 return E;
2540 }
2541}
2542
2543Expr *Expr::IgnoreCasts() {
2544 Expr *E = this;
2545 while (true) {
2546 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2547 E = P->getSubExpr();
2548 continue;
2549 }
2550 if (MaterializeTemporaryExpr *Materialize
2551 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2552 E = Materialize->GetTemporaryExpr();
2553 continue;
2554 }
2555 if (SubstNonTypeTemplateParmExpr *NTTP
2556 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2557 E = NTTP->getReplacement();
2558 continue;
2559 }
2560 return E;
2561 }
2562}
2563
2564/// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2565/// casts. This is intended purely as a temporary workaround for code
2566/// that hasn't yet been rewritten to do the right thing about those
2567/// casts, and may disappear along with the last internal use.
2568Expr *Expr::IgnoreParenLValueCasts() {
2569 Expr *E = this;
2570 while (true) {
2571 E = E->IgnoreParens();
2572 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2573 if (P->getCastKind() == CK_LValueToRValue) {
2574 E = P->getSubExpr();
2575 continue;
2576 }
2577 } else if (MaterializeTemporaryExpr *Materialize
2578 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2579 E = Materialize->GetTemporaryExpr();
2580 continue;
2581 } else if (SubstNonTypeTemplateParmExpr *NTTP
2582 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2583 E = NTTP->getReplacement();
2584 continue;
2585 }
2586 break;
2587 }
2588 return E;
2589}
2590
2591Expr *Expr::ignoreParenBaseCasts() {
2592 Expr *E = this;
2593 while (true) {
2594 E = E->IgnoreParens();
2595 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2596 if (CE->getCastKind() == CK_DerivedToBase ||
2597 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2598 CE->getCastKind() == CK_NoOp) {
2599 E = CE->getSubExpr();
2600 continue;
2601 }
2602 }
2603
2604 return E;
2605 }
2606}
2607
2608Expr *Expr::IgnoreParenImpCasts() {
2609 Expr *E = this;
2610 while (true) {
2611 E = E->IgnoreParens();
2612 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2613 E = P->getSubExpr();
2614 continue;
2615 }
2616 if (MaterializeTemporaryExpr *Materialize
2617 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2618 E = Materialize->GetTemporaryExpr();
2619 continue;
2620 }
2621 if (SubstNonTypeTemplateParmExpr *NTTP
2622 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2623 E = NTTP->getReplacement();
2624 continue;
2625 }
2626 return E;
2627 }
2628}
2629
2630Expr *Expr::IgnoreConversionOperator() {
2631 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2632 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2633 return MCE->getImplicitObjectArgument();
2634 }
2635 return this;
2636}
2637
2638/// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2639/// value (including ptr->int casts of the same size). Strip off any
2640/// ParenExpr or CastExprs, returning their operand.
2641Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2642 Expr *E = this;
2643 while (true) {
2644 E = E->IgnoreParens();
2645
2646 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2647 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2648 // ptr<->int casts of the same width. We also ignore all identity casts.
2649 Expr *SE = P->getSubExpr();
2650
2651 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2652 E = SE;
2653 continue;
2654 }
2655
2656 if ((E->getType()->isPointerType() ||
2657 E->getType()->isIntegralType(Ctx)) &&
2658 (SE->getType()->isPointerType() ||
2659 SE->getType()->isIntegralType(Ctx)) &&
2660 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2661 E = SE;
2662 continue;
2663 }
2664 }
2665
2666 if (SubstNonTypeTemplateParmExpr *NTTP
2667 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2668 E = NTTP->getReplacement();
2669 continue;
2670 }
2671
2672 return E;
2673 }
2674}
2675
2676bool Expr::isDefaultArgument() const {
2677 const Expr *E = this;
2678 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2679 E = M->GetTemporaryExpr();
2680
2681 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2682 E = ICE->getSubExprAsWritten();
2683
2684 return isa<CXXDefaultArgExpr>(E);
2685}
2686
2687/// Skip over any no-op casts and any temporary-binding
2688/// expressions.
2689static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2690 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2691 E = M->GetTemporaryExpr();
2692
2693 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2694 if (ICE->getCastKind() == CK_NoOp)
2695 E = ICE->getSubExpr();
2696 else
2697 break;
2698 }
2699
2700 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2701 E = BE->getSubExpr();
2702
2703 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2704 if (ICE->getCastKind() == CK_NoOp)
2705 E = ICE->getSubExpr();
2706 else
2707 break;
2708 }
2709
2710 return E->IgnoreParens();
2711}
2712
2713/// isTemporaryObject - Determines if this expression produces a
2714/// temporary of the given class type.
2715bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2716 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2717 return false;
2718
2719 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2720
2721 // Temporaries are by definition pr-values of class type.
2722 if (!E->Classify(C).isPRValue()) {
2723 // In this context, property reference is a message call and is pr-value.
2724 if (!isa<ObjCPropertyRefExpr>(E))
2725 return false;
2726 }
2727
2728 // Black-list a few cases which yield pr-values of class type that don't
2729 // refer to temporaries of that type:
2730
2731 // - implicit derived-to-base conversions
2732 if (isa<ImplicitCastExpr>(E)) {
2733 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2734 case CK_DerivedToBase:
2735 case CK_UncheckedDerivedToBase:
2736 return false;
2737 default:
2738 break;
2739 }
2740 }
2741
2742 // - member expressions (all)
2743 if (isa<MemberExpr>(E))
2744 return false;
2745
2746 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2747 if (BO->isPtrMemOp())
2748 return false;
2749
2750 // - opaque values (all)
2751 if (isa<OpaqueValueExpr>(E))
2752 return false;
2753
2754 return true;
2755}
2756
2757bool Expr::isImplicitCXXThis() const {
2758 const Expr *E = this;
2759
2760 // Strip away parentheses and casts we don't care about.
2761 while (true) {
2762 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2763 E = Paren->getSubExpr();
2764 continue;
2765 }
2766
2767 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2768 if (ICE->getCastKind() == CK_NoOp ||
2769 ICE->getCastKind() == CK_LValueToRValue ||
2770 ICE->getCastKind() == CK_DerivedToBase ||
2771 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2772 E = ICE->getSubExpr();
2773 continue;
2774 }
2775 }
2776
2777 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2778 if (UnOp->getOpcode() == UO_Extension) {
2779 E = UnOp->getSubExpr();
2780 continue;
2781 }
2782 }
2783
2784 if (const MaterializeTemporaryExpr *M
2785 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2786 E = M->GetTemporaryExpr();
2787 continue;
2788 }
2789
2790 break;
2791 }
2792
2793 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2794 return This->isImplicit();
2795
2796 return false;
2797}
2798
2799/// hasAnyTypeDependentArguments - Determines if any of the expressions
2800/// in Exprs is type-dependent.
2801bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2802 for (unsigned I = 0; I < Exprs.size(); ++I)
2803 if (Exprs[I]->isTypeDependent())
2804 return true;
2805
2806 return false;
2807}
2808
2809bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2810 const Expr **Culprit) const {
2811 // This function is attempting whether an expression is an initializer
2812 // which can be evaluated at compile-time. It very closely parallels
2813 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2814 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2815 // to isEvaluatable most of the time.
2816 //
2817 // If we ever capture reference-binding directly in the AST, we can
2818 // kill the second parameter.
2819
2820 if (IsForRef) {
2821 EvalResult Result;
2822 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2823 return true;
2824 if (Culprit)
2825 *Culprit = this;
2826 return false;
2827 }
2828
2829 switch (getStmtClass()) {
2830 default: break;
2831 case StringLiteralClass:
2832 case ObjCEncodeExprClass:
2833 return true;
2834 case CXXTemporaryObjectExprClass:
2835 case CXXConstructExprClass: {
2836 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2837
2838 if (CE->getConstructor()->isTrivial() &&
2839 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2840 // Trivial default constructor
2841 if (!CE->getNumArgs()) return true;
2842
2843 // Trivial copy constructor
2844 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument")(static_cast <bool> (CE->getNumArgs() == 1 &&
"trivial ctor with > 1 argument") ? void (0) : __assert_fail
("CE->getNumArgs() == 1 && \"trivial ctor with > 1 argument\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 2844, __extension__ __PRETTY_FUNCTION__))
;
2845 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2846 }
2847
2848 break;
2849 }
2850 case CompoundLiteralExprClass: {
2851 // This handles gcc's extension that allows global initializers like
2852 // "struct x {int x;} x = (struct x) {};".
2853 // FIXME: This accepts other cases it shouldn't!
2854 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2855 return Exp->isConstantInitializer(Ctx, false, Culprit);
2856 }
2857 case DesignatedInitUpdateExprClass: {
2858 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2859 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2860 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2861 }
2862 case InitListExprClass: {
2863 const InitListExpr *ILE = cast<InitListExpr>(this);
2864 if (ILE->getType()->isArrayType()) {
2865 unsigned numInits = ILE->getNumInits();
2866 for (unsigned i = 0; i < numInits; i++) {
2867 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2868 return false;
2869 }
2870 return true;
2871 }
2872
2873 if (ILE->getType()->isRecordType()) {
2874 unsigned ElementNo = 0;
2875 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2876 for (const auto *Field : RD->fields()) {
2877 // If this is a union, skip all the fields that aren't being initialized.
2878 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2879 continue;
2880
2881 // Don't emit anonymous bitfields, they just affect layout.
2882 if (Field->isUnnamedBitfield())
2883 continue;
2884
2885 if (ElementNo < ILE->getNumInits()) {
2886 const Expr *Elt = ILE->getInit(ElementNo++);
2887 if (Field->isBitField()) {
2888 // Bitfields have to evaluate to an integer.
2889 llvm::APSInt ResultTmp;
2890 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2891 if (Culprit)
2892 *Culprit = Elt;
2893 return false;
2894 }
2895 } else {
2896 bool RefType = Field->getType()->isReferenceType();
2897 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2898 return false;
2899 }
2900 }
2901 }
2902 return true;
2903 }
2904
2905 break;
2906 }
2907 case ImplicitValueInitExprClass:
2908 case NoInitExprClass:
2909 return true;
2910 case ParenExprClass:
2911 return cast<ParenExpr>(this)->getSubExpr()
2912 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2913 case GenericSelectionExprClass:
2914 return cast<GenericSelectionExpr>(this)->getResultExpr()
2915 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2916 case ChooseExprClass:
2917 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2918 if (Culprit)
2919 *Culprit = this;
2920 return false;
2921 }
2922 return cast<ChooseExpr>(this)->getChosenSubExpr()
2923 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2924 case UnaryOperatorClass: {
2925 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2926 if (Exp->getOpcode() == UO_Extension)
2927 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2928 break;
2929 }
2930 case CXXFunctionalCastExprClass:
2931 case CXXStaticCastExprClass:
2932 case ImplicitCastExprClass:
2933 case CStyleCastExprClass:
2934 case ObjCBridgedCastExprClass:
2935 case CXXDynamicCastExprClass:
2936 case CXXReinterpretCastExprClass:
2937 case CXXConstCastExprClass: {
2938 const CastExpr *CE = cast<CastExpr>(this);
2939
2940 // Handle misc casts we want to ignore.
2941 if (CE->getCastKind() == CK_NoOp ||
2942 CE->getCastKind() == CK_LValueToRValue ||
2943 CE->getCastKind() == CK_ToUnion ||
2944 CE->getCastKind() == CK_ConstructorConversion ||
2945 CE->getCastKind() == CK_NonAtomicToAtomic ||
2946 CE->getCastKind() == CK_AtomicToNonAtomic ||
2947 CE->getCastKind() == CK_IntToOCLSampler)
2948 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2949
2950 break;
2951 }
2952 case MaterializeTemporaryExprClass:
2953 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2954 ->isConstantInitializer(Ctx, false, Culprit);
2955
2956 case SubstNonTypeTemplateParmExprClass:
2957 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2958 ->isConstantInitializer(Ctx, false, Culprit);
2959 case CXXDefaultArgExprClass:
2960 return cast<CXXDefaultArgExpr>(this)->getExpr()
2961 ->isConstantInitializer(Ctx, false, Culprit);
2962 case CXXDefaultInitExprClass:
2963 return cast<CXXDefaultInitExpr>(this)->getExpr()
2964 ->isConstantInitializer(Ctx, false, Culprit);
2965 }
2966 // Allow certain forms of UB in constant initializers: signed integer
2967 // overflow and floating-point division by zero. We'll give a warning on
2968 // these, but they're common enough that we have to accept them.
2969 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2970 return true;
2971 if (Culprit)
2972 *Culprit = this;
2973 return false;
2974}
2975
2976bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
2977 const FunctionDecl* FD = getDirectCallee();
2978 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
2979 FD->getBuiltinID() != Builtin::BI__builtin_assume))
2980 return false;
2981
2982 const Expr* Arg = getArg(0);
2983 bool ArgVal;
2984 return !Arg->isValueDependent() &&
2985 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
2986}
2987
2988namespace {
2989 /// Look for any side effects within a Stmt.
2990 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
2991 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
2992 const bool IncludePossibleEffects;
2993 bool HasSideEffects;
2994
2995 public:
2996 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
2997 : Inherited(Context),
2998 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
2999
3000 bool hasSideEffects() const { return HasSideEffects; }
3001
3002 void VisitExpr(const Expr *E) {
3003 if (!HasSideEffects &&
3004 E->HasSideEffects(Context, IncludePossibleEffects))
3005 HasSideEffects = true;
3006 }
3007 };
3008}
3009
3010bool Expr::HasSideEffects(const ASTContext &Ctx,
3011 bool IncludePossibleEffects) const {
3012 // In circumstances where we care about definite side effects instead of
3013 // potential side effects, we want to ignore expressions that are part of a
3014 // macro expansion as a potential side effect.
3015 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3016 return false;
3017
3018 if (isInstantiationDependent())
3019 return IncludePossibleEffects;
3020
3021 switch (getStmtClass()) {
3022 case NoStmtClass:
3023 #define ABSTRACT_STMT(Type)
3024 #define STMT(Type, Base) case Type##Class:
3025 #define EXPR(Type, Base)
3026 #include "clang/AST/StmtNodes.inc"
3027 llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3027)
;
3028
3029 case DependentScopeDeclRefExprClass:
3030 case CXXUnresolvedConstructExprClass:
3031 case CXXDependentScopeMemberExprClass:
3032 case UnresolvedLookupExprClass:
3033 case UnresolvedMemberExprClass:
3034 case PackExpansionExprClass:
3035 case SubstNonTypeTemplateParmPackExprClass:
3036 case FunctionParmPackExprClass:
3037 case TypoExprClass:
3038 case CXXFoldExprClass:
3039 llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3039)
;
3040
3041 case DeclRefExprClass:
3042 case ObjCIvarRefExprClass:
3043 case PredefinedExprClass:
3044 case IntegerLiteralClass:
3045 case FixedPointLiteralClass:
3046 case FloatingLiteralClass:
3047 case ImaginaryLiteralClass:
3048 case StringLiteralClass:
3049 case CharacterLiteralClass:
3050 case OffsetOfExprClass:
3051 case ImplicitValueInitExprClass:
3052 case UnaryExprOrTypeTraitExprClass:
3053 case AddrLabelExprClass:
3054 case GNUNullExprClass:
3055 case ArrayInitIndexExprClass:
3056 case NoInitExprClass:
3057 case CXXBoolLiteralExprClass:
3058 case CXXNullPtrLiteralExprClass:
3059 case CXXThisExprClass:
3060 case CXXScalarValueInitExprClass:
3061 case TypeTraitExprClass:
3062 case ArrayTypeTraitExprClass:
3063 case ExpressionTraitExprClass:
3064 case CXXNoexceptExprClass:
3065 case SizeOfPackExprClass:
3066 case ObjCStringLiteralClass:
3067 case ObjCEncodeExprClass:
3068 case ObjCBoolLiteralExprClass:
3069 case ObjCAvailabilityCheckExprClass:
3070 case CXXUuidofExprClass:
3071 case OpaqueValueExprClass:
3072 // These never have a side-effect.
3073 return false;
3074
3075 case CallExprClass:
3076 case CXXOperatorCallExprClass:
3077 case CXXMemberCallExprClass:
3078 case CUDAKernelCallExprClass:
3079 case UserDefinedLiteralClass: {
3080 // We don't know a call definitely has side effects, except for calls
3081 // to pure/const functions that definitely don't.
3082 // If the call itself is considered side-effect free, check the operands.
3083 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3084 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3085 if (IsPure || !IncludePossibleEffects)
3086 break;
3087 return true;
3088 }
3089
3090 case BlockExprClass:
3091 case CXXBindTemporaryExprClass:
3092 if (!IncludePossibleEffects)
3093 break;
3094 return true;
3095
3096 case MSPropertyRefExprClass:
3097 case MSPropertySubscriptExprClass:
3098 case CompoundAssignOperatorClass:
3099 case VAArgExprClass:
3100 case AtomicExprClass:
3101 case CXXThrowExprClass:
3102 case CXXNewExprClass:
3103 case CXXDeleteExprClass:
3104 case CoawaitExprClass:
3105 case DependentCoawaitExprClass:
3106 case CoyieldExprClass:
3107 // These always have a side-effect.
3108 return true;
3109
3110 case StmtExprClass: {
3111 // StmtExprs have a side-effect if any substatement does.
3112 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3113 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3114 return Finder.hasSideEffects();
3115 }
3116
3117 case ExprWithCleanupsClass:
3118 if (IncludePossibleEffects)
3119 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3120 return true;
3121 break;
3122
3123 case ParenExprClass:
3124 case ArraySubscriptExprClass:
3125 case OMPArraySectionExprClass:
3126 case MemberExprClass:
3127 case ConditionalOperatorClass:
3128 case BinaryConditionalOperatorClass:
3129 case CompoundLiteralExprClass:
3130 case ExtVectorElementExprClass:
3131 case DesignatedInitExprClass:
3132 case DesignatedInitUpdateExprClass:
3133 case ArrayInitLoopExprClass:
3134 case ParenListExprClass:
3135 case CXXPseudoDestructorExprClass:
3136 case CXXStdInitializerListExprClass:
3137 case SubstNonTypeTemplateParmExprClass:
3138 case MaterializeTemporaryExprClass:
3139 case ShuffleVectorExprClass:
3140 case ConvertVectorExprClass:
3141 case AsTypeExprClass:
3142 // These have a side-effect if any subexpression does.
3143 break;
3144
3145 case UnaryOperatorClass:
3146 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3147 return true;
3148 break;
3149
3150 case BinaryOperatorClass:
3151 if (cast<BinaryOperator>(this)->isAssignmentOp())
3152 return true;
3153 break;
3154
3155 case InitListExprClass:
3156 // FIXME: The children for an InitListExpr doesn't include the array filler.
3157 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3158 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3159 return true;
3160 break;
3161
3162 case GenericSelectionExprClass:
3163 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3164 HasSideEffects(Ctx, IncludePossibleEffects);
3165
3166 case ChooseExprClass:
3167 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3168 Ctx, IncludePossibleEffects);
3169
3170 case CXXDefaultArgExprClass:
3171 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3172 Ctx, IncludePossibleEffects);
3173
3174 case CXXDefaultInitExprClass: {
3175 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3176 if (const Expr *E = FD->getInClassInitializer())
3177 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3178 // If we've not yet parsed the initializer, assume it has side-effects.
3179 return true;
3180 }
3181
3182 case CXXDynamicCastExprClass: {
3183 // A dynamic_cast expression has side-effects if it can throw.
3184 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3185 if (DCE->getTypeAsWritten()->isReferenceType() &&
3186 DCE->getCastKind() == CK_Dynamic)
3187 return true;
3188 }
3189 LLVM_FALLTHROUGH[[clang::fallthrough]];
3190 case ImplicitCastExprClass:
3191 case CStyleCastExprClass:
3192 case CXXStaticCastExprClass:
3193 case CXXReinterpretCastExprClass:
3194 case CXXConstCastExprClass:
3195 case CXXFunctionalCastExprClass: {
3196 // While volatile reads are side-effecting in both C and C++, we treat them
3197 // as having possible (not definite) side-effects. This allows idiomatic
3198 // code to behave without warning, such as sizeof(*v) for a volatile-
3199 // qualified pointer.
3200 if (!IncludePossibleEffects)
3201 break;
3202
3203 const CastExpr *CE = cast<CastExpr>(this);
3204 if (CE->getCastKind() == CK_LValueToRValue &&
3205 CE->getSubExpr()->getType().isVolatileQualified())
3206 return true;
3207 break;
3208 }
3209
3210 case CXXTypeidExprClass:
3211 // typeid might throw if its subexpression is potentially-evaluated, so has
3212 // side-effects in that case whether or not its subexpression does.
3213 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3214
3215 case CXXConstructExprClass:
3216 case CXXTemporaryObjectExprClass: {
3217 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3218 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3219 return true;
3220 // A trivial constructor does not add any side-effects of its own. Just look
3221 // at its arguments.
3222 break;
3223 }
3224
3225 case CXXInheritedCtorInitExprClass: {
3226 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3227 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3228 return true;
3229 break;
3230 }
3231
3232 case LambdaExprClass: {
3233 const LambdaExpr *LE = cast<LambdaExpr>(this);
3234 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3235 E = LE->capture_end(); I != E; ++I)
3236 if (I->getCaptureKind() == LCK_ByCopy)
3237 // FIXME: Only has a side-effect if the variable is volatile or if
3238 // the copy would invoke a non-trivial copy constructor.
3239 return true;
3240 return false;
3241 }
3242
3243 case PseudoObjectExprClass: {
3244 // Only look for side-effects in the semantic form, and look past
3245 // OpaqueValueExpr bindings in that form.
3246 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3247 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3248 E = PO->semantics_end();
3249 I != E; ++I) {
3250 const Expr *Subexpr = *I;
3251 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3252 Subexpr = OVE->getSourceExpr();
3253 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3254 return true;
3255 }
3256 return false;
3257 }
3258
3259 case ObjCBoxedExprClass:
3260 case ObjCArrayLiteralClass:
3261 case ObjCDictionaryLiteralClass:
3262 case ObjCSelectorExprClass:
3263 case ObjCProtocolExprClass:
3264 case ObjCIsaExprClass:
3265 case ObjCIndirectCopyRestoreExprClass:
3266 case ObjCSubscriptRefExprClass:
3267 case ObjCBridgedCastExprClass:
3268 case ObjCMessageExprClass:
3269 case ObjCPropertyRefExprClass:
3270 // FIXME: Classify these cases better.
3271 if (IncludePossibleEffects)
3272 return true;
3273 break;
3274 }
3275
3276 // Recurse to children.
3277 for (const Stmt *SubStmt : children())
3278 if (SubStmt &&
3279 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3280 return true;
3281
3282 return false;
3283}
3284
3285namespace {
3286 /// Look for a call to a non-trivial function within an expression.
3287 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3288 {
3289 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3290
3291 bool NonTrivial;
3292
3293 public:
3294 explicit NonTrivialCallFinder(const ASTContext &Context)
3295 : Inherited(Context), NonTrivial(false) { }
3296
3297 bool hasNonTrivialCall() const { return NonTrivial; }
3298
3299 void VisitCallExpr(const CallExpr *E) {
3300 if (const CXXMethodDecl *Method
3301 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3302 if (Method->isTrivial()) {
3303 // Recurse to children of the call.
3304 Inherited::VisitStmt(E);
3305 return;
3306 }
3307 }
3308
3309 NonTrivial = true;
3310 }
3311
3312 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3313 if (E->getConstructor()->isTrivial()) {
3314 // Recurse to children of the call.
3315 Inherited::VisitStmt(E);
3316 return;
3317 }
3318
3319 NonTrivial = true;
3320 }
3321
3322 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3323 if (E->getTemporary()->getDestructor()->isTrivial()) {
3324 Inherited::VisitStmt(E);
3325 return;
3326 }
3327
3328 NonTrivial = true;
3329 }
3330 };
3331}
3332
3333bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3334 NonTrivialCallFinder Finder(Ctx);
3335 Finder.Visit(this);
3336 return Finder.hasNonTrivialCall();
3337}
3338
3339/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3340/// pointer constant or not, as well as the specific kind of constant detected.
3341/// Null pointer constants can be integer constant expressions with the
3342/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3343/// (a GNU extension).
3344Expr::NullPointerConstantKind
3345Expr::isNullPointerConstant(ASTContext &Ctx,
3346 NullPointerConstantValueDependence NPC) const {
3347 if (isValueDependent() &&
3348 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3349 switch (NPC) {
3350 case NPC_NeverValueDependent:
3351 llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3351)
;
3352 case NPC_ValueDependentIsNull:
3353 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3354 return NPCK_ZeroExpression;
3355 else
3356 return NPCK_NotNull;
3357
3358 case NPC_ValueDependentIsNotNull:
3359 return NPCK_NotNull;
3360 }
3361 }
3362
3363 // Strip off a cast to void*, if it exists. Except in C++.
3364 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3365 if (!Ctx.getLangOpts().CPlusPlus) {
3366 // Check that it is a cast to void*.
3367 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3368 QualType Pointee = PT->getPointeeType();
3369 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3370 // has non-default address space it is not treated as nullptr.
3371 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3372 // since it cannot be assigned to a pointer to constant address space.
3373 bool PointeeHasDefaultAS =
3374 Pointee.getAddressSpace() == LangAS::Default ||
3375 (Ctx.getLangOpts().OpenCLVersion >= 200 &&
3376 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3377 (Ctx.getLangOpts().OpenCL &&
3378 Ctx.getLangOpts().OpenCLVersion < 200 &&
3379 Pointee.getAddressSpace() == LangAS::opencl_private);
3380
3381 if (PointeeHasDefaultAS && Pointee->isVoidType() && // to void*
3382 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3383 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3384 }
3385 }
3386 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3387 // Ignore the ImplicitCastExpr type entirely.
3388 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3389 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3390 // Accept ((void*)0) as a null pointer constant, as many other
3391 // implementations do.
3392 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3393 } else if (const GenericSelectionExpr *GE =
3394 dyn_cast<GenericSelectionExpr>(this)) {
3395 if (GE->isResultDependent())
3396 return NPCK_NotNull;
3397 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3398 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3399 if (CE->isConditionDependent())
3400 return NPCK_NotNull;
3401 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3402 } else if (const CXXDefaultArgExpr *DefaultArg
3403 = dyn_cast<CXXDefaultArgExpr>(this)) {
3404 // See through default argument expressions.
3405 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3406 } else if (const CXXDefaultInitExpr *DefaultInit
3407 = dyn_cast<CXXDefaultInitExpr>(this)) {
3408 // See through default initializer expressions.
3409 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3410 } else if (isa<GNUNullExpr>(this)) {
3411 // The GNU __null extension is always a null pointer constant.
3412 return NPCK_GNUNull;
3413 } else if (const MaterializeTemporaryExpr *M
3414 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3415 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3416 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3417 if (const Expr *Source = OVE->getSourceExpr())
3418 return Source->isNullPointerConstant(Ctx, NPC);
3419 }
3420
3421 // C++11 nullptr_t is always a null pointer constant.
3422 if (getType()->isNullPtrType())
3423 return NPCK_CXX11_nullptr;
3424
3425 if (const RecordType *UT = getType()->getAsUnionType())
3426 if (!Ctx.getLangOpts().CPlusPlus11 &&
3427 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3428 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3429 const Expr *InitExpr = CLE->getInitializer();
3430 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3431 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3432 }
3433 // This expression must be an integer type.
3434 if (!getType()->isIntegerType() ||
3435 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3436 return NPCK_NotNull;
3437
3438 if (Ctx.getLangOpts().CPlusPlus11) {
3439 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3440 // value zero or a prvalue of type std::nullptr_t.
3441 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3442 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3443 if (Lit && !Lit->getValue())
3444 return NPCK_ZeroLiteral;
3445 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3446 return NPCK_NotNull;
3447 } else {
3448 // If we have an integer constant expression, we need to *evaluate* it and
3449 // test for the value 0.
3450 if (!isIntegerConstantExpr(Ctx))
3451 return NPCK_NotNull;
3452 }
3453
3454 if (EvaluateKnownConstInt(Ctx) != 0)
3455 return NPCK_NotNull;
3456
3457 if (isa<IntegerLiteral>(this))
3458 return NPCK_ZeroLiteral;
3459 return NPCK_ZeroExpression;
3460}
3461
3462/// If this expression is an l-value for an Objective C
3463/// property, find the underlying property reference expression.
3464const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3465 const Expr *E = this;
3466 while (true) {
3467 assert((E->getValueKind() == VK_LValue &&(static_cast <bool> ((E->getValueKind() == VK_LValue
&& E->getObjectKind() == OK_ObjCProperty) &&
"expression is not a property reference") ? void (0) : __assert_fail
("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3469, __extension__ __PRETTY_FUNCTION__))
3468 E->getObjectKind() == OK_ObjCProperty) &&(static_cast <bool> ((E->getValueKind() == VK_LValue
&& E->getObjectKind() == OK_ObjCProperty) &&
"expression is not a property reference") ? void (0) : __assert_fail
("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3469, __extension__ __PRETTY_FUNCTION__))
3469 "expression is not a property reference")(static_cast <bool> ((E->getValueKind() == VK_LValue
&& E->getObjectKind() == OK_ObjCProperty) &&
"expression is not a property reference") ? void (0) : __assert_fail
("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3469, __extension__ __PRETTY_FUNCTION__))
;
3470 E = E->IgnoreParenCasts();
3471 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3472 if (BO->getOpcode() == BO_Comma) {
3473 E = BO->getRHS();
3474 continue;
3475 }
3476 }
3477
3478 break;
3479 }
3480
3481 return cast<ObjCPropertyRefExpr>(E);
3482}
3483
3484bool Expr::isObjCSelfExpr() const {
3485 const Expr *E = IgnoreParenImpCasts();
3486
3487 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3488 if (!DRE)
3489 return false;
3490
3491 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3492 if (!Param)
3493 return false;
3494
3495 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3496 if (!M)
3497 return false;
3498
3499 return M->getSelfDecl() == Param;
3500}
3501
3502FieldDecl *Expr::getSourceBitField() {
3503 Expr *E = this->IgnoreParens();
3504
3505 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3506 if (ICE->getCastKind() == CK_LValueToRValue ||
3507 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3508 E = ICE->getSubExpr()->IgnoreParens();
3509 else
3510 break;
3511 }
3512
3513 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3514 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3515 if (Field->isBitField())
3516 return Field;
3517
3518 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3519 FieldDecl *Ivar = IvarRef->getDecl();
3520 if (Ivar->isBitField())
3521 return Ivar;
3522 }
3523
3524 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3525 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3526 if (Field->isBitField())
3527 return Field;
3528
3529 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3530 if (Expr *E = BD->getBinding())
3531 return E->getSourceBitField();
3532 }
3533
3534 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3535 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3536 return BinOp->getLHS()->getSourceBitField();
3537
3538 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3539 return BinOp->getRHS()->getSourceBitField();
3540 }
3541
3542 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3543 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3544 return UnOp->getSubExpr()->getSourceBitField();
3545
3546 return nullptr;
3547}
3548
3549bool Expr::refersToVectorElement() const {
3550 // FIXME: Why do we not just look at the ObjectKind here?
3551 const Expr *E = this->IgnoreParens();
3552
3553 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3554 if (ICE->getValueKind() != VK_RValue &&
3555 ICE->getCastKind() == CK_NoOp)
3556 E = ICE->getSubExpr()->IgnoreParens();
3557 else
3558 break;
3559 }
3560
3561 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3562 return ASE->getBase()->getType()->isVectorType();
3563
3564 if (isa<ExtVectorElementExpr>(E))
3565 return true;
3566
3567 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3568 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3569 if (auto *E = BD->getBinding())
3570 return E->refersToVectorElement();
3571
3572 return false;
3573}
3574
3575bool Expr::refersToGlobalRegisterVar() const {
3576 const Expr *E = this->IgnoreParenImpCasts();
3577
3578 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3579 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3580 if (VD->getStorageClass() == SC_Register &&
3581 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3582 return true;
3583
3584 return false;
3585}
3586
3587/// isArrow - Return true if the base expression is a pointer to vector,
3588/// return false if the base expression is a vector.
3589bool ExtVectorElementExpr::isArrow() const {
3590 return getBase()->getType()->isPointerType();
3591}
3592
3593unsigned ExtVectorElementExpr::getNumElements() const {
3594 if (const VectorType *VT = getType()->getAs<VectorType>())
3595 return VT->getNumElements();
3596 return 1;
3597}
3598
3599/// containsDuplicateElements - Return true if any element access is repeated.
3600bool ExtVectorElementExpr::containsDuplicateElements() const {
3601 // FIXME: Refactor this code to an accessor on the AST node which returns the
3602 // "type" of component access, and share with code below and in Sema.
3603 StringRef Comp = Accessor->getName();
3604
3605 // Halving swizzles do not contain duplicate elements.
3606 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3607 return false;
3608
3609 // Advance past s-char prefix on hex swizzles.
3610 if (Comp[0] == 's' || Comp[0] == 'S')
3611 Comp = Comp.substr(1);
3612
3613 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3614 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3615 return true;
3616
3617 return false;
3618}
3619
3620/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3621void ExtVectorElementExpr::getEncodedElementAccess(
3622 SmallVectorImpl<uint32_t> &Elts) const {
3623 StringRef Comp = Accessor->getName();
3624 bool isNumericAccessor = false;
3625 if (Comp[0] == 's' || Comp[0] == 'S') {
3626 Comp = Comp.substr(1);
3627 isNumericAccessor = true;
3628 }
3629
3630 bool isHi = Comp == "hi";
3631 bool isLo = Comp == "lo";
3632 bool isEven = Comp == "even";
3633 bool isOdd = Comp == "odd";
3634
3635 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3636 uint64_t Index;
3637
3638 if (isHi)
3639 Index = e + i;
3640 else if (isLo)
3641 Index = i;
3642 else if (isEven)
3643 Index = 2 * i;
3644 else if (isOdd)
3645 Index = 2 * i + 1;
3646 else
3647 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3648
3649 Elts.push_back(Index);
3650 }
3651}
3652
3653ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3654 QualType Type, SourceLocation BLoc,
3655 SourceLocation RP)
3656 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3657 Type->isDependentType(), Type->isDependentType(),
3658 Type->isInstantiationDependentType(),
3659 Type->containsUnexpandedParameterPack()),
3660 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3661{
3662 SubExprs = new (C) Stmt*[args.size()];
3663 for (unsigned i = 0; i != args.size(); i++) {
3664 if (args[i]->isTypeDependent())
3665 ExprBits.TypeDependent = true;
3666 if (args[i]->isValueDependent())
3667 ExprBits.ValueDependent = true;
3668 if (args[i]->isInstantiationDependent())
3669 ExprBits.InstantiationDependent = true;
3670 if (args[i]->containsUnexpandedParameterPack())
3671 ExprBits.ContainsUnexpandedParameterPack = true;
3672
3673 SubExprs[i] = args[i];
3674 }
3675}
3676
3677void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3678 if (SubExprs) C.Deallocate(SubExprs);
3679
3680 this->NumExprs = Exprs.size();
3681 SubExprs = new (C) Stmt*[NumExprs];
3682 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3683}
3684
3685GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3686 SourceLocation GenericLoc, Expr *ControllingExpr,
3687 ArrayRef<TypeSourceInfo*> AssocTypes,
3688 ArrayRef<Expr*> AssocExprs,
3689 SourceLocation DefaultLoc,
3690 SourceLocation RParenLoc,
3691 bool ContainsUnexpandedParameterPack,
3692 unsigned ResultIndex)
3693 : Expr(GenericSelectionExprClass,
3694 AssocExprs[ResultIndex]->getType(),
3695 AssocExprs[ResultIndex]->getValueKind(),
3696 AssocExprs[ResultIndex]->getObjectKind(),
3697 AssocExprs[ResultIndex]->isTypeDependent(),
3698 AssocExprs[ResultIndex]->isValueDependent(),
3699 AssocExprs[ResultIndex]->isInstantiationDependent(),
3700 ContainsUnexpandedParameterPack),
3701 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3702 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3703 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3704 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3705 SubExprs[CONTROLLING] = ControllingExpr;
3706 assert(AssocTypes.size() == AssocExprs.size())(static_cast <bool> (AssocTypes.size() == AssocExprs.size
()) ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3706, __extension__ __PRETTY_FUNCTION__))
;
3707 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3708 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3709}
3710
3711GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3712 SourceLocation GenericLoc, Expr *ControllingExpr,
3713 ArrayRef<TypeSourceInfo*> AssocTypes,
3714 ArrayRef<Expr*> AssocExprs,
3715 SourceLocation DefaultLoc,
3716 SourceLocation RParenLoc,
3717 bool ContainsUnexpandedParameterPack)
3718 : Expr(GenericSelectionExprClass,
3719 Context.DependentTy,
3720 VK_RValue,
3721 OK_Ordinary,
3722 /*isTypeDependent=*/true,
3723 /*isValueDependent=*/true,
3724 /*isInstantiationDependent=*/true,
3725 ContainsUnexpandedParameterPack),
3726 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3727 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3728 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3729 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3730 SubExprs[CONTROLLING] = ControllingExpr;
3731 assert(AssocTypes.size() == AssocExprs.size())(static_cast <bool> (AssocTypes.size() == AssocExprs.size
()) ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3731, __extension__ __PRETTY_FUNCTION__))
;
3732 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3733 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3734}
3735
3736//===----------------------------------------------------------------------===//
3737// DesignatedInitExpr
3738//===----------------------------------------------------------------------===//
3739
3740IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3741 assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator &&
"Only valid on a field designator") ? void (0) : __assert_fail
("Kind == FieldDesignator && \"Only valid on a field designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3741, __extension__ __PRETTY_FUNCTION__))
;
3742 if (Field.NameOrField & 0x01)
3743 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3744 else
3745 return getField()->getIdentifier();
3746}
3747
3748DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3749 llvm::ArrayRef<Designator> Designators,
3750 SourceLocation EqualOrColonLoc,
3751 bool GNUSyntax,
3752 ArrayRef<Expr*> IndexExprs,
3753 Expr *Init)
3754 : Expr(DesignatedInitExprClass, Ty,
3755 Init->getValueKind(), Init->getObjectKind(),
3756 Init->isTypeDependent(), Init->isValueDependent(),
3757 Init->isInstantiationDependent(),
3758 Init->containsUnexpandedParameterPack()),
3759 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3760 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3761 this->Designators = new (C) Designator[NumDesignators];
3762
3763 // Record the initializer itself.
3764 child_iterator Child = child_begin();
3765 *Child++ = Init;
3766
3767 // Copy the designators and their subexpressions, computing
3768 // value-dependence along the way.
3769 unsigned IndexIdx = 0;
3770 for (unsigned I = 0; I != NumDesignators; ++I) {
3771 this->Designators[I] = Designators[I];
3772
3773 if (this->Designators[I].isArrayDesignator()) {
3774 // Compute type- and value-dependence.
3775 Expr *Index = IndexExprs[IndexIdx];
3776 if (Index->isTypeDependent() || Index->isValueDependent())
3777 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3778 if (Index->isInstantiationDependent())
3779 ExprBits.InstantiationDependent = true;
3780 // Propagate unexpanded parameter packs.
3781 if (Index->containsUnexpandedParameterPack())
3782 ExprBits.ContainsUnexpandedParameterPack = true;
3783
3784 // Copy the index expressions into permanent storage.
3785 *Child++ = IndexExprs[IndexIdx++];
3786 } else if (this->Designators[I].isArrayRangeDesignator()) {
3787 // Compute type- and value-dependence.
3788 Expr *Start = IndexExprs[IndexIdx];
3789 Expr *End = IndexExprs[IndexIdx + 1];
3790 if (Start->isTypeDependent() || Start->isValueDependent() ||
3791 End->isTypeDependent() || End->isValueDependent()) {
3792 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3793 ExprBits.InstantiationDependent = true;
3794 } else if (Start->isInstantiationDependent() ||
3795 End->isInstantiationDependent()) {
3796 ExprBits.InstantiationDependent = true;
3797 }
3798
3799 // Propagate unexpanded parameter packs.
3800 if (Start->containsUnexpandedParameterPack() ||
3801 End->containsUnexpandedParameterPack())
3802 ExprBits.ContainsUnexpandedParameterPack = true;
3803
3804 // Copy the start/end expressions into permanent storage.
3805 *Child++ = IndexExprs[IndexIdx++];
3806 *Child++ = IndexExprs[IndexIdx++];
3807 }
3808 }
3809
3810 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions")(static_cast <bool> (IndexIdx == IndexExprs.size() &&
"Wrong number of index expressions") ? void (0) : __assert_fail
("IndexIdx == IndexExprs.size() && \"Wrong number of index expressions\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3810, __extension__ __PRETTY_FUNCTION__))
;
3811}
3812
3813DesignatedInitExpr *
3814DesignatedInitExpr::Create(const ASTContext &C,
3815 llvm::ArrayRef<Designator> Designators,
3816 ArrayRef<Expr*> IndexExprs,
3817 SourceLocation ColonOrEqualLoc,
3818 bool UsesColonSyntax, Expr *Init) {
3819 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3820 alignof(DesignatedInitExpr));
3821 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
3822 ColonOrEqualLoc, UsesColonSyntax,
3823 IndexExprs, Init);
3824}
3825
3826DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3827 unsigned NumIndexExprs) {
3828 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3829 alignof(DesignatedInitExpr));
3830 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3831}
3832
3833void DesignatedInitExpr::setDesignators(const ASTContext &C,
3834 const Designator *Desigs,
3835 unsigned NumDesigs) {
3836 Designators = new (C) Designator[NumDesigs];
3837 NumDesignators = NumDesigs;
3838 for (unsigned I = 0; I != NumDesigs; ++I)
3839 Designators[I] = Desigs[I];
3840}
3841
3842SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3843 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3844 if (size() == 1)
3845 return DIE->getDesignator(0)->getSourceRange();
3846 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3847 DIE->getDesignator(size()-1)->getLocEnd());
3848}
3849
3850SourceLocation DesignatedInitExpr::getLocStart() const {
3851 SourceLocation StartLoc;
3852 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3853 Designator &First = *DIE->getDesignator(0);
3854 if (First.isFieldDesignator()) {
3855 if (GNUSyntax)
3856 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3857 else
3858 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3859 } else
3860 StartLoc =
3861 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3862 return StartLoc;
3863}
3864
3865SourceLocation DesignatedInitExpr::getLocEnd() const {
3866 return getInit()->getLocEnd();
3867}
3868
3869Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3870 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator")(static_cast <bool> (D.Kind == Designator::ArrayDesignator
&& "Requires array designator") ? void (0) : __assert_fail
("D.Kind == Designator::ArrayDesignator && \"Requires array designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3870, __extension__ __PRETTY_FUNCTION__))
;
3871 return getSubExpr(D.ArrayOrRange.Index + 1);
3872}
3873
3874Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3875 assert(D.Kind == Designator::ArrayRangeDesignator &&(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
&& "Requires array range designator") ? void (0) : __assert_fail
("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3876, __extension__ __PRETTY_FUNCTION__))
3876 "Requires array range designator")(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
&& "Requires array range designator") ? void (0) : __assert_fail
("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3876, __extension__ __PRETTY_FUNCTION__))
;
3877 return getSubExpr(D.ArrayOrRange.Index + 1);
3878}
3879
3880Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3881 assert(D.Kind == Designator::ArrayRangeDesignator &&(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
&& "Requires array range designator") ? void (0) : __assert_fail
("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3882, __extension__ __PRETTY_FUNCTION__))
3882 "Requires array range designator")(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
&& "Requires array range designator") ? void (0) : __assert_fail
("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3882, __extension__ __PRETTY_FUNCTION__))
;
3883 return getSubExpr(D.ArrayOrRange.Index + 2);
3884}
3885
3886/// Replaces the designator at index @p Idx with the series
3887/// of designators in [First, Last).
3888void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3889 const Designator *First,
3890 const Designator *Last) {
3891 unsigned NumNewDesignators = Last - First;
3892 if (NumNewDesignators == 0) {
3893 std::copy_backward(Designators + Idx + 1,
3894 Designators + NumDesignators,
3895 Designators + Idx);
3896 --NumNewDesignators;
3897 return;
3898 } else if (NumNewDesignators == 1) {
3899 Designators[Idx] = *First;
3900 return;
3901 }
3902
3903 Designator *NewDesignators
3904 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3905 std::copy(Designators, Designators + Idx, NewDesignators);
3906 std::copy(First, Last, NewDesignators + Idx);
3907 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3908 NewDesignators + Idx + NumNewDesignators);
3909 Designators = NewDesignators;
3910 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3911}
3912
3913DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3914 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3915 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3916 OK_Ordinary, false, false, false, false) {
3917 BaseAndUpdaterExprs[0] = baseExpr;
3918
3919 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3920 ILE->setType(baseExpr->getType());
3921 BaseAndUpdaterExprs[1] = ILE;
3922}
3923
3924SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3925 return getBase()->getLocStart();
3926}
3927
3928SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3929 return getBase()->getLocEnd();
3930}
3931
3932ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3933 ArrayRef<Expr*> exprs,
3934 SourceLocation rparenloc)
3935 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3936 false, false, false, false),
3937 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3938 Exprs = new (C) Stmt*[exprs.size()];
1
Null pointer value stored to field 'Exprs'
3939 for (unsigned i = 0; i != exprs.size(); ++i) {
2
Assuming the condition is true
3
Loop condition is true. Entering loop body
3940 if (exprs[i]->isTypeDependent())
4
Assuming the condition is false
5
Taking false branch
3941 ExprBits.TypeDependent = true;
3942 if (exprs[i]->isValueDependent())
6
Assuming the condition is false
7
Taking false branch
3943 ExprBits.ValueDependent = true;
3944 if (exprs[i]->isInstantiationDependent())
8
Assuming the condition is false
9
Taking false branch
3945 ExprBits.InstantiationDependent = true;
3946 if (exprs[i]->containsUnexpandedParameterPack())
10
Assuming the condition is false
11
Taking false branch
3947 ExprBits.ContainsUnexpandedParameterPack = true;
3948
3949 Exprs[i] = exprs[i];
12
Array access (via field 'Exprs') results in a null pointer dereference
3950 }
3951}
3952
3953const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3954 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3955 e = ewc->getSubExpr();
3956 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3957 e = m->GetTemporaryExpr();
3958 e = cast<CXXConstructExpr>(e)->getArg(0);
3959 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3960 e = ice->getSubExpr();
3961 return cast<OpaqueValueExpr>(e);
3962}
3963
3964PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3965 EmptyShell sh,
3966 unsigned numSemanticExprs) {
3967 void *buffer =
3968 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3969 alignof(PseudoObjectExpr));
3970 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3971}
3972
3973PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3974 : Expr(PseudoObjectExprClass, shell) {
3975 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3976}
3977
3978PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
3979 ArrayRef<Expr*> semantics,
3980 unsigned resultIndex) {
3981 assert(syntax && "no syntactic expression!")(static_cast <bool> (syntax && "no syntactic expression!"
) ? void (0) : __assert_fail ("syntax && \"no syntactic expression!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3981, __extension__ __PRETTY_FUNCTION__))
;
3982 assert(semantics.size() && "no semantic expressions!")(static_cast <bool> (semantics.size() && "no semantic expressions!"
) ? void (0) : __assert_fail ("semantics.size() && \"no semantic expressions!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3982, __extension__ __PRETTY_FUNCTION__))
;
3983
3984 QualType type;
3985 ExprValueKind VK;
3986 if (resultIndex == NoResult) {
3987 type = C.VoidTy;
3988 VK = VK_RValue;
3989 } else {
3990 assert(resultIndex < semantics.size())(static_cast <bool> (resultIndex < semantics.size())
? void (0) : __assert_fail ("resultIndex < semantics.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3990, __extension__ __PRETTY_FUNCTION__))
;
3991 type = semantics[resultIndex]->getType();
3992 VK = semantics[resultIndex]->getValueKind();
3993 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary)(static_cast <bool> (semantics[resultIndex]->getObjectKind
() == OK_Ordinary) ? void (0) : __assert_fail ("semantics[resultIndex]->getObjectKind() == OK_Ordinary"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 3993, __extension__ __PRETTY_FUNCTION__))
;
3994 }
3995
3996 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
3997 alignof(PseudoObjectExpr));
3998 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
3999 resultIndex);
4000}
4001
4002PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4003 Expr *syntax, ArrayRef<Expr*> semantics,
4004 unsigned resultIndex)
4005 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4006 /*filled in at end of ctor*/ false, false, false, false) {
4007 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4008 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4009
4010 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4011 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4012 getSubExprsBuffer()[i] = E;
4013
4014 if (E->isTypeDependent())
4015 ExprBits.TypeDependent = true;
4016 if (E->isValueDependent())
4017 ExprBits.ValueDependent = true;
4018 if (E->isInstantiationDependent())
4019 ExprBits.InstantiationDependent = true;
4020 if (E->containsUnexpandedParameterPack())
4021 ExprBits.ContainsUnexpandedParameterPack = true;
4022
4023 if (isa<OpaqueValueExpr>(E))
4024 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4026, __extension__ __PRETTY_FUNCTION__))
4025 "opaque-value semantic expressions for pseudo-object "(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4026, __extension__ __PRETTY_FUNCTION__))
4026 "operations must have sources")(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4026, __extension__ __PRETTY_FUNCTION__))
;
4027 }
4028}
4029
4030//===----------------------------------------------------------------------===//
4031// Child Iterators for iterating over subexpressions/substatements
4032//===----------------------------------------------------------------------===//
4033
4034// UnaryExprOrTypeTraitExpr
4035Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4036 const_child_range CCR =
4037 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4038 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4039}
4040
4041Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
4042 // If this is of a type and the type is a VLA type (and not a typedef), the
4043 // size expression of the VLA needs to be treated as an executable expression.
4044 // Why isn't this weirdness documented better in StmtIterator?
4045 if (isArgumentType()) {
4046 if (const VariableArrayType *T =
4047 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4048 return const_child_range(const_child_iterator(T), const_child_iterator());
4049 return const_child_range(const_child_iterator(), const_child_iterator());
4050 }
4051 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4052}
4053
4054AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4055 QualType t, AtomicOp op, SourceLocation RP)
4056 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4057 false, false, false, false),
4058 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4059{
4060 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions")(static_cast <bool> (args.size() == getNumSubExprs(op) &&
"wrong number of subexpressions") ? void (0) : __assert_fail
("args.size() == getNumSubExprs(op) && \"wrong number of subexpressions\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4060, __extension__ __PRETTY_FUNCTION__))
;
4061 for (unsigned i = 0; i != args.size(); i++) {
4062 if (args[i]->isTypeDependent())
4063 ExprBits.TypeDependent = true;
4064 if (args[i]->isValueDependent())
4065 ExprBits.ValueDependent = true;
4066 if (args[i]->isInstantiationDependent())
4067 ExprBits.InstantiationDependent = true;
4068 if (args[i]->containsUnexpandedParameterPack())
4069 ExprBits.ContainsUnexpandedParameterPack = true;
4070
4071 SubExprs[i] = args[i];
4072 }
4073}
4074
4075unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4076 switch (Op) {
4077 case AO__c11_atomic_init:
4078 case AO__opencl_atomic_init:
4079 case AO__c11_atomic_load:
4080 case AO__atomic_load_n:
4081 return 2;
4082
4083 case AO__opencl_atomic_load:
4084 case AO__c11_atomic_store:
4085 case AO__c11_atomic_exchange:
4086 case AO__atomic_load:
4087 case AO__atomic_store:
4088 case AO__atomic_store_n:
4089 case AO__atomic_exchange_n:
4090 case AO__c11_atomic_fetch_add:
4091 case AO__c11_atomic_fetch_sub:
4092 case AO__c11_atomic_fetch_and:
4093 case AO__c11_atomic_fetch_or:
4094 case AO__c11_atomic_fetch_xor:
4095 case AO__atomic_fetch_add:
4096 case AO__atomic_fetch_sub:
4097 case AO__atomic_fetch_and:
4098 case AO__atomic_fetch_or:
4099 case AO__atomic_fetch_xor:
4100 case AO__atomic_fetch_nand:
4101 case AO__atomic_add_fetch:
4102 case AO__atomic_sub_fetch:
4103 case AO__atomic_and_fetch:
4104 case AO__atomic_or_fetch:
4105 case AO__atomic_xor_fetch:
4106 case AO__atomic_nand_fetch:
4107 case AO__atomic_fetch_min:
4108 case AO__atomic_fetch_max:
4109 return 3;
4110
4111 case AO__opencl_atomic_store:
4112 case AO__opencl_atomic_exchange:
4113 case AO__opencl_atomic_fetch_add:
4114 case AO__opencl_atomic_fetch_sub:
4115 case AO__opencl_atomic_fetch_and:
4116 case AO__opencl_atomic_fetch_or:
4117 case AO__opencl_atomic_fetch_xor:
4118 case AO__opencl_atomic_fetch_min:
4119 case AO__opencl_atomic_fetch_max:
4120 case AO__atomic_exchange:
4121 return 4;
4122
4123 case AO__c11_atomic_compare_exchange_strong:
4124 case AO__c11_atomic_compare_exchange_weak:
4125 return 5;
4126
4127 case AO__opencl_atomic_compare_exchange_strong:
4128 case AO__opencl_atomic_compare_exchange_weak:
4129 case AO__atomic_compare_exchange:
4130 case AO__atomic_compare_exchange_n:
4131 return 6;
4132 }
4133 llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4133)
;
4134}
4135
4136QualType AtomicExpr::getValueType() const {
4137 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4138 if (auto AT = T->getAs<AtomicType>())
4139 return AT->getValueType();
4140 return T;
4141}
4142
4143QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
4144 unsigned ArraySectionCount = 0;
4145 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4146 Base = OASE->getBase();
4147 ++ArraySectionCount;
4148 }
4149 while (auto *ASE =
4150 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
4151 Base = ASE->getBase();
4152 ++ArraySectionCount;
4153 }
4154 Base = Base->IgnoreParenImpCasts();
4155 auto OriginalTy = Base->getType();
4156 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4157 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4158 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4159
4160 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4161 if (OriginalTy->isAnyPointerType())
4162 OriginalTy = OriginalTy->getPointeeType();
4163 else {
4164 assert (OriginalTy->isArrayType())(static_cast <bool> (OriginalTy->isArrayType()) ? void
(0) : __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Expr.cpp"
, 4164, __extension__ __PRETTY_FUNCTION__))
;
4165 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
4166 }
4167 }
4168 return OriginalTy;
4169}