Bug Summary

File:tools/clang/lib/AST/Expr.cpp
Warning:line 4058, column 5
Called C++ object pointer is null

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-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 -analyzer-config-compatibility-mode=true -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-9/lib/clang/9.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-9~svn361465/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-9~svn361465/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn361465/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn361465/build-llvm/include -I /build/llvm-toolchain-snapshot-9~svn361465/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/include/clang/9.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-9/lib/clang/9.0.0/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-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-9~svn361465/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-9~svn361465=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -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-2019-05-24-031927-21217-1 -x c++ /build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp -faddrsig
1//===--- Expr.cpp - Expression AST Node Implementation --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the Expr class and subclasses.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/Expr.h"
14#include "clang/AST/APValue.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/DeclTemplate.h"
20#include "clang/AST/EvaluatedExprVisitor.h"
21#include "clang/AST/ExprCXX.h"
22#include "clang/AST/Mangle.h"
23#include "clang/AST/RecordLayout.h"
24#include "clang/AST/StmtVisitor.h"
25#include "clang/Basic/Builtins.h"
26#include "clang/Basic/CharInfo.h"
27#include "clang/Basic/SourceManager.h"
28#include "clang/Basic/TargetInfo.h"
29#include "clang/Lex/Lexer.h"
30#include "clang/Lex/LiteralSupport.h"
31#include "llvm/Support/ErrorHandling.h"
32#include "llvm/Support/raw_ostream.h"
33#include <algorithm>
34#include <cstring>
35using namespace clang;
36
37const Expr *Expr::getBestDynamicClassTypeExpr() const {
38 const Expr *E = this;
39 while (true) {
40 E = E->ignoreParenBaseCasts();
41
42 // Follow the RHS of a comma operator.
43 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
44 if (BO->getOpcode() == BO_Comma) {
45 E = BO->getRHS();
46 continue;
47 }
48 }
49
50 // Step into initializer for materialized temporaries.
51 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
52 E = MTE->GetTemporaryExpr();
53 continue;
54 }
55
56 break;
57 }
58
59 return E;
60}
61
62const CXXRecordDecl *Expr::getBestDynamicClassType() const {
63 const Expr *E = getBestDynamicClassTypeExpr();
64 QualType DerivedType = E->getType();
65 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
66 DerivedType = PTy->getPointeeType();
67
68 if (DerivedType->isDependentType())
69 return nullptr;
70
71 const RecordType *Ty = DerivedType->castAs<RecordType>();
72 Decl *D = Ty->getDecl();
73 return cast<CXXRecordDecl>(D);
74}
75
76const Expr *Expr::skipRValueSubobjectAdjustments(
77 SmallVectorImpl<const Expr *> &CommaLHSs,
78 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
79 const Expr *E = this;
80 while (true) {
81 E = E->IgnoreParens();
82
83 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
84 if ((CE->getCastKind() == CK_DerivedToBase ||
85 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
86 E->getType()->isRecordType()) {
87 E = CE->getSubExpr();
88 CXXRecordDecl *Derived
89 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
90 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
91 continue;
92 }
93
94 if (CE->getCastKind() == CK_NoOp) {
95 E = CE->getSubExpr();
96 continue;
97 }
98 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
99 if (!ME->isArrow()) {
100 assert(ME->getBase()->getType()->isRecordType())((ME->getBase()->getType()->isRecordType()) ? static_cast
<void> (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 100, __PRETTY_FUNCTION__))
;
101 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
102 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
103 E = ME->getBase();
104 Adjustments.push_back(SubobjectAdjustment(Field));
105 continue;
106 }
107 }
108 }
109 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
110 if (BO->getOpcode() == BO_PtrMemD) {
111 assert(BO->getRHS()->isRValue())((BO->getRHS()->isRValue()) ? static_cast<void> (
0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 111, __PRETTY_FUNCTION__))
;
112 E = BO->getLHS();
113 const MemberPointerType *MPT =
114 BO->getRHS()->getType()->getAs<MemberPointerType>();
115 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
116 continue;
117 } else if (BO->getOpcode() == BO_Comma) {
118 CommaLHSs.push_back(BO->getLHS());
119 E = BO->getRHS();
120 continue;
121 }
122 }
123
124 // Nothing changed.
125 break;
126 }
127 return E;
128}
129
130/// isKnownToHaveBooleanValue - Return true if this is an integer expression
131/// that is known to return 0 or 1. This happens for _Bool/bool expressions
132/// but also int expressions which are produced by things like comparisons in
133/// C.
134bool Expr::isKnownToHaveBooleanValue() const {
135 const Expr *E = IgnoreParens();
136
137 // If this value has _Bool type, it is obvious 0/1.
138 if (E->getType()->isBooleanType()) return true;
139 // If this is a non-scalar-integer type, we don't care enough to try.
140 if (!E->getType()->isIntegralOrEnumerationType()) return false;
141
142 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
143 switch (UO->getOpcode()) {
144 case UO_Plus:
145 return UO->getSubExpr()->isKnownToHaveBooleanValue();
146 case UO_LNot:
147 return true;
148 default:
149 return false;
150 }
151 }
152
153 // Only look through implicit casts. If the user writes
154 // '(int) (a && b)' treat it as an arbitrary int.
155 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
156 return CE->getSubExpr()->isKnownToHaveBooleanValue();
157
158 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
159 switch (BO->getOpcode()) {
160 default: return false;
161 case BO_LT: // Relational operators.
162 case BO_GT:
163 case BO_LE:
164 case BO_GE:
165 case BO_EQ: // Equality operators.
166 case BO_NE:
167 case BO_LAnd: // AND operator.
168 case BO_LOr: // Logical OR operator.
169 return true;
170
171 case BO_And: // Bitwise AND operator.
172 case BO_Xor: // Bitwise XOR operator.
173 case BO_Or: // Bitwise OR operator.
174 // Handle things like (x==2)|(y==12).
175 return BO->getLHS()->isKnownToHaveBooleanValue() &&
176 BO->getRHS()->isKnownToHaveBooleanValue();
177
178 case BO_Comma:
179 case BO_Assign:
180 return BO->getRHS()->isKnownToHaveBooleanValue();
181 }
182 }
183
184 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
185 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
186 CO->getFalseExpr()->isKnownToHaveBooleanValue();
187
188 return false;
189}
190
191// Amusing macro metaprogramming hack: check whether a class provides
192// a more specific implementation of getExprLoc().
193//
194// See also Stmt.cpp:{getBeginLoc(),getEndLoc()}.
195namespace {
196 /// This implementation is used when a class provides a custom
197 /// implementation of getExprLoc.
198 template <class E, class T>
199 SourceLocation getExprLocImpl(const Expr *expr,
200 SourceLocation (T::*v)() const) {
201 return static_cast<const E*>(expr)->getExprLoc();
202 }
203
204 /// This implementation is used when a class doesn't provide
205 /// a custom implementation of getExprLoc. Overload resolution
206 /// should pick it over the implementation above because it's
207 /// more specialized according to function template partial ordering.
208 template <class E>
209 SourceLocation getExprLocImpl(const Expr *expr,
210 SourceLocation (Expr::*v)() const) {
211 return static_cast<const E *>(expr)->getBeginLoc();
212 }
213}
214
215SourceLocation Expr::getExprLoc() const {
216 switch (getStmtClass()) {
217 case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 217)
;
218#define ABSTRACT_STMT(type)
219#define STMT(type, base) \
220 case Stmt::type##Class: break;
221#define EXPR(type, base) \
222 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
223#include "clang/AST/StmtNodes.inc"
224 }
225 llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 225)
;
226}
227
228//===----------------------------------------------------------------------===//
229// Primary Expressions.
230//===----------------------------------------------------------------------===//
231
232/// Compute the type-, value-, and instantiation-dependence of a
233/// declaration reference
234/// based on the declaration being referenced.
235static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
236 QualType T, bool &TypeDependent,
237 bool &ValueDependent,
238 bool &InstantiationDependent) {
239 TypeDependent = false;
240 ValueDependent = false;
241 InstantiationDependent = false;
242
243 // (TD) C++ [temp.dep.expr]p3:
244 // An id-expression is type-dependent if it contains:
245 //
246 // and
247 //
248 // (VD) C++ [temp.dep.constexpr]p2:
249 // An identifier is value-dependent if it is:
250
251 // (TD) - an identifier that was declared with dependent type
252 // (VD) - a name declared with a dependent type,
253 if (T->isDependentType()) {
254 TypeDependent = true;
255 ValueDependent = true;
256 InstantiationDependent = true;
257 return;
258 } else if (T->isInstantiationDependentType()) {
259 InstantiationDependent = true;
260 }
261
262 // (TD) - a conversion-function-id that specifies a dependent type
263 if (D->getDeclName().getNameKind()
264 == DeclarationName::CXXConversionFunctionName) {
265 QualType T = D->getDeclName().getCXXNameType();
266 if (T->isDependentType()) {
267 TypeDependent = true;
268 ValueDependent = true;
269 InstantiationDependent = true;
270 return;
271 }
272
273 if (T->isInstantiationDependentType())
274 InstantiationDependent = true;
275 }
276
277 // (VD) - the name of a non-type template parameter,
278 if (isa<NonTypeTemplateParmDecl>(D)) {
279 ValueDependent = true;
280 InstantiationDependent = true;
281 return;
282 }
283
284 // (VD) - a constant with integral or enumeration type and is
285 // initialized with an expression that is value-dependent.
286 // (VD) - a constant with literal type and is initialized with an
287 // expression that is value-dependent [C++11].
288 // (VD) - FIXME: Missing from the standard:
289 // - an entity with reference type and is initialized with an
290 // expression that is value-dependent [C++11]
291 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
292 if ((Ctx.getLangOpts().CPlusPlus11 ?
293 Var->getType()->isLiteralType(Ctx) :
294 Var->getType()->isIntegralOrEnumerationType()) &&
295 (Var->getType().isConstQualified() ||
296 Var->getType()->isReferenceType())) {
297 if (const Expr *Init = Var->getAnyInitializer())
298 if (Init->isValueDependent()) {
299 ValueDependent = true;
300 InstantiationDependent = true;
301 }
302 }
303
304 // (VD) - FIXME: Missing from the standard:
305 // - a member function or a static data member of the current
306 // instantiation
307 if (Var->isStaticDataMember() &&
308 Var->getDeclContext()->isDependentContext()) {
309 ValueDependent = true;
310 InstantiationDependent = true;
311 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
312 if (TInfo->getType()->isIncompleteArrayType())
313 TypeDependent = true;
314 }
315
316 return;
317 }
318
319 // (VD) - FIXME: Missing from the standard:
320 // - a member function or a static data member of the current
321 // instantiation
322 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
323 ValueDependent = true;
324 InstantiationDependent = true;
325 }
326}
327
328void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
329 bool TypeDependent = false;
330 bool ValueDependent = false;
331 bool InstantiationDependent = false;
332 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
333 ValueDependent, InstantiationDependent);
334
335 ExprBits.TypeDependent |= TypeDependent;
336 ExprBits.ValueDependent |= ValueDependent;
337 ExprBits.InstantiationDependent |= InstantiationDependent;
338
339 // Is the declaration a parameter pack?
340 if (getDecl()->isParameterPack())
341 ExprBits.ContainsUnexpandedParameterPack = true;
342}
343
344DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D,
345 bool RefersToEnclosingVariableOrCapture, QualType T,
346 ExprValueKind VK, SourceLocation L,
347 const DeclarationNameLoc &LocInfo)
348 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
349 D(D), DNLoc(LocInfo) {
350 DeclRefExprBits.HasQualifier = false;
351 DeclRefExprBits.HasTemplateKWAndArgsInfo = false;
352 DeclRefExprBits.HasFoundDecl = false;
353 DeclRefExprBits.HadMultipleCandidates = false;
354 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
355 RefersToEnclosingVariableOrCapture;
356 DeclRefExprBits.Loc = L;
357 computeDependence(Ctx);
358}
359
360DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
361 NestedNameSpecifierLoc QualifierLoc,
362 SourceLocation TemplateKWLoc, ValueDecl *D,
363 bool RefersToEnclosingVariableOrCapture,
364 const DeclarationNameInfo &NameInfo, NamedDecl *FoundD,
365 const TemplateArgumentListInfo *TemplateArgs,
366 QualType T, ExprValueKind VK)
367 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
368 D(D), DNLoc(NameInfo.getInfo()) {
369 DeclRefExprBits.Loc = NameInfo.getLoc();
370 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
371 if (QualifierLoc) {
372 new (getTrailingObjects<NestedNameSpecifierLoc>())
373 NestedNameSpecifierLoc(QualifierLoc);
374 auto *NNS = QualifierLoc.getNestedNameSpecifier();
375 if (NNS->isInstantiationDependent())
376 ExprBits.InstantiationDependent = true;
377 if (NNS->containsUnexpandedParameterPack())
378 ExprBits.ContainsUnexpandedParameterPack = true;
379 }
380 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
381 if (FoundD)
382 *getTrailingObjects<NamedDecl *>() = FoundD;
383 DeclRefExprBits.HasTemplateKWAndArgsInfo
384 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
385 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
386 RefersToEnclosingVariableOrCapture;
387 if (TemplateArgs) {
388 bool Dependent = false;
389 bool InstantiationDependent = false;
390 bool ContainsUnexpandedParameterPack = false;
391 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
392 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
393 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
394 assert(!Dependent && "built a DeclRefExpr with dependent template args")((!Dependent && "built a DeclRefExpr with dependent template args"
) ? static_cast<void> (0) : __assert_fail ("!Dependent && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 394, __PRETTY_FUNCTION__))
;
395 ExprBits.InstantiationDependent |= InstantiationDependent;
396 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
397 } else if (TemplateKWLoc.isValid()) {
398 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
399 TemplateKWLoc);
400 }
401 DeclRefExprBits.HadMultipleCandidates = 0;
402
403 computeDependence(Ctx);
404}
405
406DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
407 NestedNameSpecifierLoc QualifierLoc,
408 SourceLocation TemplateKWLoc,
409 ValueDecl *D,
410 bool RefersToEnclosingVariableOrCapture,
411 SourceLocation NameLoc,
412 QualType T,
413 ExprValueKind VK,
414 NamedDecl *FoundD,
415 const TemplateArgumentListInfo *TemplateArgs) {
416 return Create(Context, QualifierLoc, TemplateKWLoc, D,
417 RefersToEnclosingVariableOrCapture,
418 DeclarationNameInfo(D->getDeclName(), NameLoc),
419 T, VK, FoundD, TemplateArgs);
420}
421
422DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
423 NestedNameSpecifierLoc QualifierLoc,
424 SourceLocation TemplateKWLoc,
425 ValueDecl *D,
426 bool RefersToEnclosingVariableOrCapture,
427 const DeclarationNameInfo &NameInfo,
428 QualType T,
429 ExprValueKind VK,
430 NamedDecl *FoundD,
431 const TemplateArgumentListInfo *TemplateArgs) {
432 // Filter out cases where the found Decl is the same as the value refenenced.
433 if (D == FoundD)
434 FoundD = nullptr;
435
436 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
437 std::size_t Size =
438 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
439 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
440 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
441 HasTemplateKWAndArgsInfo ? 1 : 0,
442 TemplateArgs ? TemplateArgs->size() : 0);
443
444 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
445 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
446 RefersToEnclosingVariableOrCapture,
447 NameInfo, FoundD, TemplateArgs, T, VK);
448}
449
450DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
451 bool HasQualifier,
452 bool HasFoundDecl,
453 bool HasTemplateKWAndArgsInfo,
454 unsigned NumTemplateArgs) {
455 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)((NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo) ? static_cast
<void> (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 455, __PRETTY_FUNCTION__))
;
456 std::size_t Size =
457 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
458 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
459 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
460 NumTemplateArgs);
461 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
462 return new (Mem) DeclRefExpr(EmptyShell());
463}
464
465SourceLocation DeclRefExpr::getBeginLoc() const {
466 if (hasQualifier())
467 return getQualifierLoc().getBeginLoc();
468 return getNameInfo().getBeginLoc();
469}
470SourceLocation DeclRefExpr::getEndLoc() const {
471 if (hasExplicitTemplateArgs())
472 return getRAngleLoc();
473 return getNameInfo().getEndLoc();
474}
475
476PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK,
477 StringLiteral *SL)
478 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
479 FNTy->isDependentType(), FNTy->isDependentType(),
480 FNTy->isInstantiationDependentType(),
481 /*ContainsUnexpandedParameterPack=*/false) {
482 PredefinedExprBits.Kind = IK;
483 assert((getIdentKind() == IK) &&(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 484, __PRETTY_FUNCTION__))
484 "IdentKind do not fit in PredefinedExprBitfields!")(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 484, __PRETTY_FUNCTION__))
;
485 bool HasFunctionName = SL != nullptr;
486 PredefinedExprBits.HasFunctionName = HasFunctionName;
487 PredefinedExprBits.Loc = L;
488 if (HasFunctionName)
489 setFunctionName(SL);
490}
491
492PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName)
493 : Expr(PredefinedExprClass, Empty) {
494 PredefinedExprBits.HasFunctionName = HasFunctionName;
495}
496
497PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L,
498 QualType FNTy, IdentKind IK,
499 StringLiteral *SL) {
500 bool HasFunctionName = SL != nullptr;
501 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
502 alignof(PredefinedExpr));
503 return new (Mem) PredefinedExpr(L, FNTy, IK, SL);
504}
505
506PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx,
507 bool HasFunctionName) {
508 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
509 alignof(PredefinedExpr));
510 return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName);
511}
512
513StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) {
514 switch (IK) {
515 case Func:
516 return "__func__";
517 case Function:
518 return "__FUNCTION__";
519 case FuncDName:
520 return "__FUNCDNAME__";
521 case LFunction:
522 return "L__FUNCTION__";
523 case PrettyFunction:
524 return "__PRETTY_FUNCTION__";
525 case FuncSig:
526 return "__FUNCSIG__";
527 case LFuncSig:
528 return "L__FUNCSIG__";
529 case PrettyFunctionNoVirtual:
530 break;
531 }
532 llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 532)
;
533}
534
535// FIXME: Maybe this should use DeclPrinter with a special "print predefined
536// expr" policy instead.
537std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) {
538 ASTContext &Context = CurrentDecl->getASTContext();
539
540 if (IK == PredefinedExpr::FuncDName) {
541 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
542 std::unique_ptr<MangleContext> MC;
543 MC.reset(Context.createMangleContext());
544
545 if (MC->shouldMangleDeclName(ND)) {
546 SmallString<256> Buffer;
547 llvm::raw_svector_ostream Out(Buffer);
548 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
549 MC->mangleCXXCtor(CD, Ctor_Base, Out);
550 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
551 MC->mangleCXXDtor(DD, Dtor_Base, Out);
552 else
553 MC->mangleName(ND, Out);
554
555 if (!Buffer.empty() && Buffer.front() == '\01')
556 return Buffer.substr(1);
557 return Buffer.str();
558 } else
559 return ND->getIdentifier()->getName();
560 }
561 return "";
562 }
563 if (isa<BlockDecl>(CurrentDecl)) {
564 // For blocks we only emit something if it is enclosed in a function
565 // For top-level block we'd like to include the name of variable, but we
566 // don't have it at this point.
567 auto DC = CurrentDecl->getDeclContext();
568 if (DC->isFileContext())
569 return "";
570
571 SmallString<256> Buffer;
572 llvm::raw_svector_ostream Out(Buffer);
573 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
574 // For nested blocks, propagate up to the parent.
575 Out << ComputeName(IK, DCBlock);
576 else if (auto *DCDecl = dyn_cast<Decl>(DC))
577 Out << ComputeName(IK, DCDecl) << "_block_invoke";
578 return Out.str();
579 }
580 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
581 if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual &&
582 IK != FuncSig && IK != LFuncSig)
583 return FD->getNameAsString();
584
585 SmallString<256> Name;
586 llvm::raw_svector_ostream Out(Name);
587
588 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
589 if (MD->isVirtual() && IK != PrettyFunctionNoVirtual)
590 Out << "virtual ";
591 if (MD->isStatic())
592 Out << "static ";
593 }
594
595 PrintingPolicy Policy(Context.getLangOpts());
596 std::string Proto;
597 llvm::raw_string_ostream POut(Proto);
598
599 const FunctionDecl *Decl = FD;
600 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
601 Decl = Pattern;
602 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
603 const FunctionProtoType *FT = nullptr;
604 if (FD->hasWrittenPrototype())
605 FT = dyn_cast<FunctionProtoType>(AFT);
606
607 if (IK == FuncSig || IK == LFuncSig) {
608 switch (AFT->getCallConv()) {
609 case CC_C: POut << "__cdecl "; break;
610 case CC_X86StdCall: POut << "__stdcall "; break;
611 case CC_X86FastCall: POut << "__fastcall "; break;
612 case CC_X86ThisCall: POut << "__thiscall "; break;
613 case CC_X86VectorCall: POut << "__vectorcall "; break;
614 case CC_X86RegCall: POut << "__regcall "; break;
615 // Only bother printing the conventions that MSVC knows about.
616 default: break;
617 }
618 }
619
620 FD->printQualifiedName(POut, Policy);
621
622 POut << "(";
623 if (FT) {
624 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
625 if (i) POut << ", ";
626 POut << Decl->getParamDecl(i)->getType().stream(Policy);
627 }
628
629 if (FT->isVariadic()) {
630 if (FD->getNumParams()) POut << ", ";
631 POut << "...";
632 } else if ((IK == FuncSig || IK == LFuncSig ||
633 !Context.getLangOpts().CPlusPlus) &&
634 !Decl->getNumParams()) {
635 POut << "void";
636 }
637 }
638 POut << ")";
639
640 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
641 assert(FT && "We must have a written prototype in this case.")((FT && "We must have a written prototype in this case."
) ? static_cast<void> (0) : __assert_fail ("FT && \"We must have a written prototype in this case.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 641, __PRETTY_FUNCTION__))
;
642 if (FT->isConst())
643 POut << " const";
644 if (FT->isVolatile())
645 POut << " volatile";
646 RefQualifierKind Ref = MD->getRefQualifier();
647 if (Ref == RQ_LValue)
648 POut << " &";
649 else if (Ref == RQ_RValue)
650 POut << " &&";
651 }
652
653 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
654 SpecsTy Specs;
655 const DeclContext *Ctx = FD->getDeclContext();
656 while (Ctx && isa<NamedDecl>(Ctx)) {
657 const ClassTemplateSpecializationDecl *Spec
658 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
659 if (Spec && !Spec->isExplicitSpecialization())
660 Specs.push_back(Spec);
661 Ctx = Ctx->getParent();
662 }
663
664 std::string TemplateParams;
665 llvm::raw_string_ostream TOut(TemplateParams);
666 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
667 I != E; ++I) {
668 const TemplateParameterList *Params
669 = (*I)->getSpecializedTemplate()->getTemplateParameters();
670 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
671 assert(Params->size() == Args.size())((Params->size() == Args.size()) ? static_cast<void>
(0) : __assert_fail ("Params->size() == Args.size()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 671, __PRETTY_FUNCTION__))
;
672 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
673 StringRef Param = Params->getParam(i)->getName();
674 if (Param.empty()) continue;
675 TOut << Param << " = ";
676 Args.get(i).print(Policy, TOut);
677 TOut << ", ";
678 }
679 }
680
681 FunctionTemplateSpecializationInfo *FSI
682 = FD->getTemplateSpecializationInfo();
683 if (FSI && !FSI->isExplicitSpecialization()) {
684 const TemplateParameterList* Params
685 = FSI->getTemplate()->getTemplateParameters();
686 const TemplateArgumentList* Args = FSI->TemplateArguments;
687 assert(Params->size() == Args->size())((Params->size() == Args->size()) ? static_cast<void
> (0) : __assert_fail ("Params->size() == Args->size()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 687, __PRETTY_FUNCTION__))
;
688 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
689 StringRef Param = Params->getParam(i)->getName();
690 if (Param.empty()) continue;
691 TOut << Param << " = ";
692 Args->get(i).print(Policy, TOut);
693 TOut << ", ";
694 }
695 }
696
697 TOut.flush();
698 if (!TemplateParams.empty()) {
699 // remove the trailing comma and space
700 TemplateParams.resize(TemplateParams.size() - 2);
701 POut << " [" << TemplateParams << "]";
702 }
703
704 POut.flush();
705
706 // Print "auto" for all deduced return types. This includes C++1y return
707 // type deduction and lambdas. For trailing return types resolve the
708 // decltype expression. Otherwise print the real type when this is
709 // not a constructor or destructor.
710 if (isa<CXXMethodDecl>(FD) &&
711 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
712 Proto = "auto " + Proto;
713 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
714 FT->getReturnType()
715 ->getAs<DecltypeType>()
716 ->getUnderlyingType()
717 .getAsStringInternal(Proto, Policy);
718 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
719 AFT->getReturnType().getAsStringInternal(Proto, Policy);
720
721 Out << Proto;
722
723 return Name.str().str();
724 }
725 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
726 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
727 // Skip to its enclosing function or method, but not its enclosing
728 // CapturedDecl.
729 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
730 const Decl *D = Decl::castFromDeclContext(DC);
731 return ComputeName(IK, D);
732 }
733 llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 733)
;
734 }
735 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
736 SmallString<256> Name;
737 llvm::raw_svector_ostream Out(Name);
738 Out << (MD->isInstanceMethod() ? '-' : '+');
739 Out << '[';
740
741 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
742 // a null check to avoid a crash.
743 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
744 Out << *ID;
745
746 if (const ObjCCategoryImplDecl *CID =
747 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
748 Out << '(' << *CID << ')';
749
750 Out << ' ';
751 MD->getSelector().print(Out);
752 Out << ']';
753
754 return Name.str().str();
755 }
756 if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) {
757 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
758 return "top level";
759 }
760 return "";
761}
762
763void APNumericStorage::setIntValue(const ASTContext &C,
764 const llvm::APInt &Val) {
765 if (hasAllocation())
766 C.Deallocate(pVal);
767
768 BitWidth = Val.getBitWidth();
769 unsigned NumWords = Val.getNumWords();
770 const uint64_t* Words = Val.getRawData();
771 if (NumWords > 1) {
772 pVal = new (C) uint64_t[NumWords];
773 std::copy(Words, Words + NumWords, pVal);
774 } else if (NumWords == 1)
775 VAL = Words[0];
776 else
777 VAL = 0;
778}
779
780IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
781 QualType type, SourceLocation l)
782 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
783 false, false),
784 Loc(l) {
785 assert(type->isIntegerType() && "Illegal type in IntegerLiteral")((type->isIntegerType() && "Illegal type in IntegerLiteral"
) ? static_cast<void> (0) : __assert_fail ("type->isIntegerType() && \"Illegal type in IntegerLiteral\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 785, __PRETTY_FUNCTION__))
;
786 assert(V.getBitWidth() == C.getIntWidth(type) &&((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 787, __PRETTY_FUNCTION__))
787 "Integer type is not the correct size for constant.")((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 787, __PRETTY_FUNCTION__))
;
788 setValue(C, V);
789}
790
791IntegerLiteral *
792IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
793 QualType type, SourceLocation l) {
794 return new (C) IntegerLiteral(C, V, type, l);
795}
796
797IntegerLiteral *
798IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
799 return new (C) IntegerLiteral(Empty);
800}
801
802FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
803 QualType type, SourceLocation l,
804 unsigned Scale)
805 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
806 false, false),
807 Loc(l), Scale(Scale) {
808 assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral")((type->isFixedPointType() && "Illegal type in FixedPointLiteral"
) ? static_cast<void> (0) : __assert_fail ("type->isFixedPointType() && \"Illegal type in FixedPointLiteral\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 808, __PRETTY_FUNCTION__))
;
809 assert(V.getBitWidth() == C.getTypeInfo(type).Width &&((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 810, __PRETTY_FUNCTION__))
810 "Fixed point type is not the correct size for constant.")((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 810, __PRETTY_FUNCTION__))
;
811 setValue(C, V);
812}
813
814FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
815 const llvm::APInt &V,
816 QualType type,
817 SourceLocation l,
818 unsigned Scale) {
819 return new (C) FixedPointLiteral(C, V, type, l, Scale);
820}
821
822std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
823 // Currently the longest decimal number that can be printed is the max for an
824 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
825 // which is 43 characters.
826 SmallString<64> S;
827 FixedPointValueToString(
828 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
829 return S.str();
830}
831
832FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
833 bool isexact, QualType Type, SourceLocation L)
834 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
835 false, false), Loc(L) {
836 setSemantics(V.getSemantics());
837 FloatingLiteralBits.IsExact = isexact;
838 setValue(C, V);
839}
840
841FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
842 : Expr(FloatingLiteralClass, Empty) {
843 setRawSemantics(IEEEhalf);
844 FloatingLiteralBits.IsExact = false;
845}
846
847FloatingLiteral *
848FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
849 bool isexact, QualType Type, SourceLocation L) {
850 return new (C) FloatingLiteral(C, V, isexact, Type, L);
851}
852
853FloatingLiteral *
854FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
855 return new (C) FloatingLiteral(C, Empty);
856}
857
858const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
859 switch(FloatingLiteralBits.Semantics) {
860 case IEEEhalf:
861 return llvm::APFloat::IEEEhalf();
862 case IEEEsingle:
863 return llvm::APFloat::IEEEsingle();
864 case IEEEdouble:
865 return llvm::APFloat::IEEEdouble();
866 case x87DoubleExtended:
867 return llvm::APFloat::x87DoubleExtended();
868 case IEEEquad:
869 return llvm::APFloat::IEEEquad();
870 case PPCDoubleDouble:
871 return llvm::APFloat::PPCDoubleDouble();
872 }
873 llvm_unreachable("Unrecognised floating semantics")::llvm::llvm_unreachable_internal("Unrecognised floating semantics"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 873)
;
874}
875
876void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
877 if (&Sem == &llvm::APFloat::IEEEhalf())
878 FloatingLiteralBits.Semantics = IEEEhalf;
879 else if (&Sem == &llvm::APFloat::IEEEsingle())
880 FloatingLiteralBits.Semantics = IEEEsingle;
881 else if (&Sem == &llvm::APFloat::IEEEdouble())
882 FloatingLiteralBits.Semantics = IEEEdouble;
883 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
884 FloatingLiteralBits.Semantics = x87DoubleExtended;
885 else if (&Sem == &llvm::APFloat::IEEEquad())
886 FloatingLiteralBits.Semantics = IEEEquad;
887 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
888 FloatingLiteralBits.Semantics = PPCDoubleDouble;
889 else
890 llvm_unreachable("Unknown floating semantics")::llvm::llvm_unreachable_internal("Unknown floating semantics"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 890)
;
891}
892
893/// getValueAsApproximateDouble - This returns the value as an inaccurate
894/// double. Note that this may cause loss of precision, but is useful for
895/// debugging dumps, etc.
896double FloatingLiteral::getValueAsApproximateDouble() const {
897 llvm::APFloat V = getValue();
898 bool ignored;
899 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
900 &ignored);
901 return V.convertToDouble();
902}
903
904unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target,
905 StringKind SK) {
906 unsigned CharByteWidth = 0;
907 switch (SK) {
908 case Ascii:
909 case UTF8:
910 CharByteWidth = Target.getCharWidth();
911 break;
912 case Wide:
913 CharByteWidth = Target.getWCharWidth();
914 break;
915 case UTF16:
916 CharByteWidth = Target.getChar16Width();
917 break;
918 case UTF32:
919 CharByteWidth = Target.getChar32Width();
920 break;
921 }
922 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple")(((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth & 7) == 0 && \"Assumes character size is byte multiple\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 922, __PRETTY_FUNCTION__))
;
923 CharByteWidth /= 8;
924 assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) &&(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth ==
4) && "The only supported character byte widths are 1,2 and 4!"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 925, __PRETTY_FUNCTION__))
925 "The only supported character byte widths are 1,2 and 4!")(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth ==
4) && "The only supported character byte widths are 1,2 and 4!"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 925, __PRETTY_FUNCTION__))
;
926 return CharByteWidth;
927}
928
929StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str,
930 StringKind Kind, bool Pascal, QualType Ty,
931 const SourceLocation *Loc,
932 unsigned NumConcatenated)
933 : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary, false, false, false,
934 false) {
935 assert(Ctx.getAsConstantArrayType(Ty) &&((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!"
) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 936, __PRETTY_FUNCTION__))
936 "StringLiteral must be of constant array type!")((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!"
) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 936, __PRETTY_FUNCTION__))
;
937 unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind);
938 unsigned ByteLength = Str.size();
939 assert((ByteLength % CharByteWidth == 0) &&(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!"
) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 940, __PRETTY_FUNCTION__))
940 "The size of the data must be a multiple of CharByteWidth!")(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!"
) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 940, __PRETTY_FUNCTION__))
;
941
942 // Avoid the expensive division. The compiler should be able to figure it
943 // out by itself. However as of clang 7, even with the appropriate
944 // llvm_unreachable added just here, it is not able to do so.
945 unsigned Length;
946 switch (CharByteWidth) {
947 case 1:
948 Length = ByteLength;
949 break;
950 case 2:
951 Length = ByteLength / 2;
952 break;
953 case 4:
954 Length = ByteLength / 4;
955 break;
956 default:
957 llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 957)
;
958 }
959
960 StringLiteralBits.Kind = Kind;
961 StringLiteralBits.CharByteWidth = CharByteWidth;
962 StringLiteralBits.IsPascal = Pascal;
963 StringLiteralBits.NumConcatenated = NumConcatenated;
964 *getTrailingObjects<unsigned>() = Length;
965
966 // Initialize the trailing array of SourceLocation.
967 // This is safe since SourceLocation is POD-like.
968 std::memcpy(getTrailingObjects<SourceLocation>(), Loc,
969 NumConcatenated * sizeof(SourceLocation));
970
971 // Initialize the trailing array of char holding the string data.
972 std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength);
973}
974
975StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated,
976 unsigned Length, unsigned CharByteWidth)
977 : Expr(StringLiteralClass, Empty) {
978 StringLiteralBits.CharByteWidth = CharByteWidth;
979 StringLiteralBits.NumConcatenated = NumConcatenated;
980 *getTrailingObjects<unsigned>() = Length;
981}
982
983StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str,
984 StringKind Kind, bool Pascal, QualType Ty,
985 const SourceLocation *Loc,
986 unsigned NumConcatenated) {
987 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
988 1, NumConcatenated, Str.size()),
989 alignof(StringLiteral));
990 return new (Mem)
991 StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated);
992}
993
994StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx,
995 unsigned NumConcatenated,
996 unsigned Length,
997 unsigned CharByteWidth) {
998 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
999 1, NumConcatenated, Length * CharByteWidth),
1000 alignof(StringLiteral));
1001 return new (Mem)
1002 StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth);
1003}
1004
1005void StringLiteral::outputString(raw_ostream &OS) const {
1006 switch (getKind()) {
1007 case Ascii: break; // no prefix.
1008 case Wide: OS << 'L'; break;
1009 case UTF8: OS << "u8"; break;
1010 case UTF16: OS << 'u'; break;
1011 case UTF32: OS << 'U'; break;
1012 }
1013 OS << '"';
1014 static const char Hex[] = "0123456789ABCDEF";
1015
1016 unsigned LastSlashX = getLength();
1017 for (unsigned I = 0, N = getLength(); I != N; ++I) {
1018 switch (uint32_t Char = getCodeUnit(I)) {
1019 default:
1020 // FIXME: Convert UTF-8 back to codepoints before rendering.
1021
1022 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
1023 // Leave invalid surrogates alone; we'll use \x for those.
1024 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
1025 Char <= 0xdbff) {
1026 uint32_t Trail = getCodeUnit(I + 1);
1027 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
1028 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
1029 ++I;
1030 }
1031 }
1032
1033 if (Char > 0xff) {
1034 // If this is a wide string, output characters over 0xff using \x
1035 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
1036 // codepoint: use \x escapes for invalid codepoints.
1037 if (getKind() == Wide ||
1038 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
1039 // FIXME: Is this the best way to print wchar_t?
1040 OS << "\\x";
1041 int Shift = 28;
1042 while ((Char >> Shift) == 0)
1043 Shift -= 4;
1044 for (/**/; Shift >= 0; Shift -= 4)
1045 OS << Hex[(Char >> Shift) & 15];
1046 LastSlashX = I;
1047 break;
1048 }
1049
1050 if (Char > 0xffff)
1051 OS << "\\U00"
1052 << Hex[(Char >> 20) & 15]
1053 << Hex[(Char >> 16) & 15];
1054 else
1055 OS << "\\u";
1056 OS << Hex[(Char >> 12) & 15]
1057 << Hex[(Char >> 8) & 15]
1058 << Hex[(Char >> 4) & 15]
1059 << Hex[(Char >> 0) & 15];
1060 break;
1061 }
1062
1063 // If we used \x... for the previous character, and this character is a
1064 // hexadecimal digit, prevent it being slurped as part of the \x.
1065 if (LastSlashX + 1 == I) {
1066 switch (Char) {
1067 case '0': case '1': case '2': case '3': case '4':
1068 case '5': case '6': case '7': case '8': case '9':
1069 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
1070 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
1071 OS << "\"\"";
1072 }
1073 }
1074
1075 assert(Char <= 0xff &&((Char <= 0xff && "Characters above 0xff should already have been handled."
) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1076, __PRETTY_FUNCTION__))
1076 "Characters above 0xff should already have been handled.")((Char <= 0xff && "Characters above 0xff should already have been handled."
) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1076, __PRETTY_FUNCTION__))
;
1077
1078 if (isPrintable(Char))
1079 OS << (char)Char;
1080 else // Output anything hard as an octal escape.
1081 OS << '\\'
1082 << (char)('0' + ((Char >> 6) & 7))
1083 << (char)('0' + ((Char >> 3) & 7))
1084 << (char)('0' + ((Char >> 0) & 7));
1085 break;
1086 // Handle some common non-printable cases to make dumps prettier.
1087 case '\\': OS << "\\\\"; break;
1088 case '"': OS << "\\\""; break;
1089 case '\a': OS << "\\a"; break;
1090 case '\b': OS << "\\b"; break;
1091 case '\f': OS << "\\f"; break;
1092 case '\n': OS << "\\n"; break;
1093 case '\r': OS << "\\r"; break;
1094 case '\t': OS << "\\t"; break;
1095 case '\v': OS << "\\v"; break;
1096 }
1097 }
1098 OS << '"';
1099}
1100
1101/// getLocationOfByte - Return a source location that points to the specified
1102/// byte of this string literal.
1103///
1104/// Strings are amazingly complex. They can be formed from multiple tokens and
1105/// can have escape sequences in them in addition to the usual trigraph and
1106/// escaped newline business. This routine handles this complexity.
1107///
1108/// The *StartToken sets the first token to be searched in this function and
1109/// the *StartTokenByteOffset is the byte offset of the first token. Before
1110/// returning, it updates the *StartToken to the TokNo of the token being found
1111/// and sets *StartTokenByteOffset to the byte offset of the token in the
1112/// string.
1113/// Using these two parameters can reduce the time complexity from O(n^2) to
1114/// O(n) if one wants to get the location of byte for all the tokens in a
1115/// string.
1116///
1117SourceLocation
1118StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1119 const LangOptions &Features,
1120 const TargetInfo &Target, unsigned *StartToken,
1121 unsigned *StartTokenByteOffset) const {
1122 assert((getKind() == StringLiteral::Ascii ||(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1124, __PRETTY_FUNCTION__))
1123 getKind() == StringLiteral::UTF8) &&(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1124, __PRETTY_FUNCTION__))
1124 "Only narrow string literals are currently supported")(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1124, __PRETTY_FUNCTION__))
;
1125
1126 // Loop over all of the tokens in this string until we find the one that
1127 // contains the byte we're looking for.
1128 unsigned TokNo = 0;
1129 unsigned StringOffset = 0;
1130 if (StartToken)
1131 TokNo = *StartToken;
1132 if (StartTokenByteOffset) {
1133 StringOffset = *StartTokenByteOffset;
1134 ByteNo -= StringOffset;
1135 }
1136 while (1) {
1137 assert(TokNo < getNumConcatenated() && "Invalid byte number!")((TokNo < getNumConcatenated() && "Invalid byte number!"
) ? static_cast<void> (0) : __assert_fail ("TokNo < getNumConcatenated() && \"Invalid byte number!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1137, __PRETTY_FUNCTION__))
;
1138 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1139
1140 // Get the spelling of the string so that we can get the data that makes up
1141 // the string literal, not the identifier for the macro it is potentially
1142 // expanded through.
1143 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1144
1145 // Re-lex the token to get its length and original spelling.
1146 std::pair<FileID, unsigned> LocInfo =
1147 SM.getDecomposedLoc(StrTokSpellingLoc);
1148 bool Invalid = false;
1149 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1150 if (Invalid) {
1151 if (StartTokenByteOffset != nullptr)
1152 *StartTokenByteOffset = StringOffset;
1153 if (StartToken != nullptr)
1154 *StartToken = TokNo;
1155 return StrTokSpellingLoc;
1156 }
1157
1158 const char *StrData = Buffer.data()+LocInfo.second;
1159
1160 // Create a lexer starting at the beginning of this token.
1161 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1162 Buffer.begin(), StrData, Buffer.end());
1163 Token TheTok;
1164 TheLexer.LexFromRawLexer(TheTok);
1165
1166 // Use the StringLiteralParser to compute the length of the string in bytes.
1167 StringLiteralParser SLP(TheTok, SM, Features, Target);
1168 unsigned TokNumBytes = SLP.GetStringLength();
1169
1170 // If the byte is in this token, return the location of the byte.
1171 if (ByteNo < TokNumBytes ||
1172 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1173 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1174
1175 // Now that we know the offset of the token in the spelling, use the
1176 // preprocessor to get the offset in the original source.
1177 if (StartTokenByteOffset != nullptr)
1178 *StartTokenByteOffset = StringOffset;
1179 if (StartToken != nullptr)
1180 *StartToken = TokNo;
1181 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1182 }
1183
1184 // Move to the next string token.
1185 StringOffset += TokNumBytes;
1186 ++TokNo;
1187 ByteNo -= TokNumBytes;
1188 }
1189}
1190
1191/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1192/// corresponds to, e.g. "sizeof" or "[pre]++".
1193StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1194 switch (Op) {
1195#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1196#include "clang/AST/OperationKinds.def"
1197 }
1198 llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1198)
;
1199}
1200
1201UnaryOperatorKind
1202UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1203 switch (OO) {
1204 default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1204)
;
1205 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1206 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1207 case OO_Amp: return UO_AddrOf;
1208 case OO_Star: return UO_Deref;
1209 case OO_Plus: return UO_Plus;
1210 case OO_Minus: return UO_Minus;
1211 case OO_Tilde: return UO_Not;
1212 case OO_Exclaim: return UO_LNot;
1213 case OO_Coawait: return UO_Coawait;
1214 }
1215}
1216
1217OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1218 switch (Opc) {
1219 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1220 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1221 case UO_AddrOf: return OO_Amp;
1222 case UO_Deref: return OO_Star;
1223 case UO_Plus: return OO_Plus;
1224 case UO_Minus: return OO_Minus;
1225 case UO_Not: return OO_Tilde;
1226 case UO_LNot: return OO_Exclaim;
1227 case UO_Coawait: return OO_Coawait;
1228 default: return OO_None;
1229 }
1230}
1231
1232
1233//===----------------------------------------------------------------------===//
1234// Postfix Operators.
1235//===----------------------------------------------------------------------===//
1236
1237CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs,
1238 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1239 SourceLocation RParenLoc, unsigned MinNumArgs,
1240 ADLCallKind UsesADL)
1241 : Expr(SC, Ty, VK, OK_Ordinary, Fn->isTypeDependent(),
1242 Fn->isValueDependent(), Fn->isInstantiationDependent(),
1243 Fn->containsUnexpandedParameterPack()),
1244 RParenLoc(RParenLoc) {
1245 NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1246 unsigned NumPreArgs = PreArgs.size();
1247 CallExprBits.NumPreArgs = NumPreArgs;
1248 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1248, __PRETTY_FUNCTION__))
;
1249
1250 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1251 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1252 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1253, __PRETTY_FUNCTION__))
1253 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1253, __PRETTY_FUNCTION__))
;
1254
1255 CallExprBits.UsesADL = static_cast<bool>(UsesADL);
1256
1257 setCallee(Fn);
1258 for (unsigned I = 0; I != NumPreArgs; ++I) {
1259 updateDependenciesFromArg(PreArgs[I]);
1260 setPreArg(I, PreArgs[I]);
1261 }
1262 for (unsigned I = 0; I != Args.size(); ++I) {
1263 updateDependenciesFromArg(Args[I]);
1264 setArg(I, Args[I]);
1265 }
1266 for (unsigned I = Args.size(); I != NumArgs; ++I) {
1267 setArg(I, nullptr);
1268 }
1269}
1270
1271CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs,
1272 EmptyShell Empty)
1273 : Expr(SC, Empty), NumArgs(NumArgs) {
1274 CallExprBits.NumPreArgs = NumPreArgs;
1275 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1275, __PRETTY_FUNCTION__))
;
1276
1277 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1278 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1279 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1280, __PRETTY_FUNCTION__))
1280 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1280, __PRETTY_FUNCTION__))
;
1281}
1282
1283CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn,
1284 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1285 SourceLocation RParenLoc, unsigned MinNumArgs,
1286 ADLCallKind UsesADL) {
1287 unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1288 unsigned SizeOfTrailingObjects =
1289 CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
1290 void *Mem =
1291 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1292 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK,
1293 RParenLoc, MinNumArgs, UsesADL);
1294}
1295
1296CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
1297 ExprValueKind VK, SourceLocation RParenLoc,
1298 ADLCallKind UsesADL) {
1299 assert(!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) &&((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr
)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1300, __PRETTY_FUNCTION__))
1300 "Misaligned memory in CallExpr::CreateTemporary!")((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr
)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1300, __PRETTY_FUNCTION__))
;
1301 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty,
1302 VK, RParenLoc, /*MinNumArgs=*/0, UsesADL);
1303}
1304
1305CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs,
1306 EmptyShell Empty) {
1307 unsigned SizeOfTrailingObjects =
1308 CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
1309 void *Mem =
1310 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1311 return new (Mem) CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, Empty);
1312}
1313
1314unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) {
1315 switch (SC) {
1316 case CallExprClass:
1317 return sizeof(CallExpr);
1318 case CXXOperatorCallExprClass:
1319 return sizeof(CXXOperatorCallExpr);
1320 case CXXMemberCallExprClass:
1321 return sizeof(CXXMemberCallExpr);
1322 case UserDefinedLiteralClass:
1323 return sizeof(UserDefinedLiteral);
1324 case CUDAKernelCallExprClass:
1325 return sizeof(CUDAKernelCallExpr);
1326 default:
1327 llvm_unreachable("unexpected class deriving from CallExpr!")::llvm::llvm_unreachable_internal("unexpected class deriving from CallExpr!"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1327)
;
1328 }
1329}
1330
1331void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1332 if (Arg->isTypeDependent())
1333 ExprBits.TypeDependent = true;
1334 if (Arg->isValueDependent())
1335 ExprBits.ValueDependent = true;
1336 if (Arg->isInstantiationDependent())
1337 ExprBits.InstantiationDependent = true;
1338 if (Arg->containsUnexpandedParameterPack())
1339 ExprBits.ContainsUnexpandedParameterPack = true;
1340}
1341
1342Decl *Expr::getReferencedDeclOfCallee() {
1343 Expr *CEE = IgnoreParenImpCasts();
1344
1345 while (SubstNonTypeTemplateParmExpr *NTTP
1346 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1347 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1348 }
1349
1350 // If we're calling a dereference, look at the pointer instead.
1351 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1352 if (BO->isPtrMemOp())
1353 CEE = BO->getRHS()->IgnoreParenCasts();
1354 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1355 if (UO->getOpcode() == UO_Deref)
1356 CEE = UO->getSubExpr()->IgnoreParenCasts();
1357 }
1358 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1359 return DRE->getDecl();
1360 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1361 return ME->getMemberDecl();
1362 if (auto *BE = dyn_cast<BlockExpr>(CEE))
1363 return BE->getBlockDecl();
1364
1365 return nullptr;
1366}
1367
1368/// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1369/// not, return 0.
1370unsigned CallExpr::getBuiltinCallee() const {
1371 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1372 // function. As a result, we try and obtain the DeclRefExpr from the
1373 // ImplicitCastExpr.
1374 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1375 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1376 return 0;
1377
1378 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1379 if (!DRE)
1380 return 0;
1381
1382 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1383 if (!FDecl)
1384 return 0;
1385
1386 if (!FDecl->getIdentifier())
1387 return 0;
1388
1389 return FDecl->getBuiltinID();
1390}
1391
1392bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1393 if (unsigned BI = getBuiltinCallee())
1394 return Ctx.BuiltinInfo.isUnevaluated(BI);
1395 return false;
1396}
1397
1398QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1399 const Expr *Callee = getCallee();
1400 QualType CalleeType = Callee->getType();
1401 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1402 CalleeType = FnTypePtr->getPointeeType();
1403 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1404 CalleeType = BPT->getPointeeType();
1405 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1406 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1407 return Ctx.VoidTy;
1408
1409 // This should never be overloaded and so should never return null.
1410 CalleeType = Expr::findBoundMemberType(Callee);
1411 }
1412
1413 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1414 return FnType->getReturnType();
1415}
1416
1417const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const {
1418 // If the return type is a struct, union, or enum that is marked nodiscard,
1419 // then return the return type attribute.
1420 if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl())
1421 if (const auto *A = TD->getAttr<WarnUnusedResultAttr>())
1422 return A;
1423
1424 // Otherwise, see if the callee is marked nodiscard and return that attribute
1425 // instead.
1426 const Decl *D = getCalleeDecl();
1427 return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr;
1428}
1429
1430SourceLocation CallExpr::getBeginLoc() const {
1431 if (isa<CXXOperatorCallExpr>(this))
1432 return cast<CXXOperatorCallExpr>(this)->getBeginLoc();
1433
1434 SourceLocation begin = getCallee()->getBeginLoc();
1435 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1436 begin = getArg(0)->getBeginLoc();
1437 return begin;
1438}
1439SourceLocation CallExpr::getEndLoc() const {
1440 if (isa<CXXOperatorCallExpr>(this))
1441 return cast<CXXOperatorCallExpr>(this)->getEndLoc();
1442
1443 SourceLocation end = getRParenLoc();
1444 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1445 end = getArg(getNumArgs() - 1)->getEndLoc();
1446 return end;
1447}
1448
1449OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1450 SourceLocation OperatorLoc,
1451 TypeSourceInfo *tsi,
1452 ArrayRef<OffsetOfNode> comps,
1453 ArrayRef<Expr*> exprs,
1454 SourceLocation RParenLoc) {
1455 void *Mem = C.Allocate(
1456 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1457
1458 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1459 RParenLoc);
1460}
1461
1462OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1463 unsigned numComps, unsigned numExprs) {
1464 void *Mem =
1465 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1466 return new (Mem) OffsetOfExpr(numComps, numExprs);
1467}
1468
1469OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1470 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1471 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1472 SourceLocation RParenLoc)
1473 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1474 /*TypeDependent=*/false,
1475 /*ValueDependent=*/tsi->getType()->isDependentType(),
1476 tsi->getType()->isInstantiationDependentType(),
1477 tsi->getType()->containsUnexpandedParameterPack()),
1478 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1479 NumComps(comps.size()), NumExprs(exprs.size())
1480{
1481 for (unsigned i = 0; i != comps.size(); ++i) {
1482 setComponent(i, comps[i]);
1483 }
1484
1485 for (unsigned i = 0; i != exprs.size(); ++i) {
1486 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1487 ExprBits.ValueDependent = true;
1488 if (exprs[i]->containsUnexpandedParameterPack())
1489 ExprBits.ContainsUnexpandedParameterPack = true;
1490
1491 setIndexExpr(i, exprs[i]);
1492 }
1493}
1494
1495IdentifierInfo *OffsetOfNode::getFieldName() const {
1496 assert(getKind() == Field || getKind() == Identifier)((getKind() == Field || getKind() == Identifier) ? static_cast
<void> (0) : __assert_fail ("getKind() == Field || getKind() == Identifier"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1496, __PRETTY_FUNCTION__))
;
1497 if (getKind() == Field)
1498 return getField()->getIdentifier();
1499
1500 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1501}
1502
1503UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1504 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1505 SourceLocation op, SourceLocation rp)
1506 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1507 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1508 // Value-dependent if the argument is type-dependent.
1509 E->isTypeDependent(), E->isInstantiationDependent(),
1510 E->containsUnexpandedParameterPack()),
1511 OpLoc(op), RParenLoc(rp) {
1512 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1513 UnaryExprOrTypeTraitExprBits.IsType = false;
1514 Argument.Ex = E;
1515
1516 // Check to see if we are in the situation where alignof(decl) should be
1517 // dependent because decl's alignment is dependent.
1518 if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) {
1519 if (!isValueDependent() || !isInstantiationDependent()) {
1520 E = E->IgnoreParens();
1521
1522 const ValueDecl *D = nullptr;
1523 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1524 D = DRE->getDecl();
1525 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1526 D = ME->getMemberDecl();
1527
1528 if (D) {
1529 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1530 if (I->isAlignmentDependent()) {
1531 setValueDependent(true);
1532 setInstantiationDependent(true);
1533 break;
1534 }
1535 }
1536 }
1537 }
1538 }
1539}
1540
1541MemberExpr *MemberExpr::Create(
1542 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1543 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1544 ValueDecl *memberdecl, DeclAccessPair founddecl,
1545 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1546 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1547
1548 bool hasQualOrFound = (QualifierLoc ||
1549 founddecl.getDecl() != memberdecl ||
1550 founddecl.getAccess() != memberdecl->getAccess());
1551
1552 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1553 std::size_t Size =
1554 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1555 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1556 HasTemplateKWAndArgsInfo ? 1 : 0,
1557 targs ? targs->size() : 0);
1558
1559 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1560 MemberExpr *E = new (Mem)
1561 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1562
1563 if (hasQualOrFound) {
1564 // FIXME: Wrong. We should be looking at the member declaration we found.
1565 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1566 E->setValueDependent(true);
1567 E->setTypeDependent(true);
1568 E->setInstantiationDependent(true);
1569 }
1570 else if (QualifierLoc &&
1571 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1572 E->setInstantiationDependent(true);
1573
1574 E->MemberExprBits.HasQualifierOrFoundDecl = true;
1575
1576 MemberExprNameQualifier *NQ =
1577 E->getTrailingObjects<MemberExprNameQualifier>();
1578 NQ->QualifierLoc = QualifierLoc;
1579 NQ->FoundDecl = founddecl;
1580 }
1581
1582 E->MemberExprBits.HasTemplateKWAndArgsInfo =
1583 (targs || TemplateKWLoc.isValid());
1584
1585 if (targs) {
1586 bool Dependent = false;
1587 bool InstantiationDependent = false;
1588 bool ContainsUnexpandedParameterPack = false;
1589 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1590 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1591 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1592 if (InstantiationDependent)
1593 E->setInstantiationDependent(true);
1594 } else if (TemplateKWLoc.isValid()) {
1595 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1596 TemplateKWLoc);
1597 }
1598
1599 return E;
1600}
1601
1602SourceLocation MemberExpr::getBeginLoc() const {
1603 if (isImplicitAccess()) {
1604 if (hasQualifier())
1605 return getQualifierLoc().getBeginLoc();
1606 return MemberLoc;
1607 }
1608
1609 // FIXME: We don't want this to happen. Rather, we should be able to
1610 // detect all kinds of implicit accesses more cleanly.
1611 SourceLocation BaseStartLoc = getBase()->getBeginLoc();
1612 if (BaseStartLoc.isValid())
1613 return BaseStartLoc;
1614 return MemberLoc;
1615}
1616SourceLocation MemberExpr::getEndLoc() const {
1617 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1618 if (hasExplicitTemplateArgs())
1619 EndLoc = getRAngleLoc();
1620 else if (EndLoc.isInvalid())
1621 EndLoc = getBase()->getEndLoc();
1622 return EndLoc;
1623}
1624
1625bool CastExpr::CastConsistency() const {
1626 switch (getCastKind()) {
1627 case CK_DerivedToBase:
1628 case CK_UncheckedDerivedToBase:
1629 case CK_DerivedToBaseMemberPointer:
1630 case CK_BaseToDerived:
1631 case CK_BaseToDerivedMemberPointer:
1632 assert(!path_empty() && "Cast kind should have a base path!")((!path_empty() && "Cast kind should have a base path!"
) ? static_cast<void> (0) : __assert_fail ("!path_empty() && \"Cast kind should have a base path!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1632, __PRETTY_FUNCTION__))
;
1633 break;
1634
1635 case CK_CPointerToObjCPointerCast:
1636 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1636, __PRETTY_FUNCTION__))
;
1637 assert(getSubExpr()->getType()->isPointerType())((getSubExpr()->getType()->isPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1637, __PRETTY_FUNCTION__))
;
1638 goto CheckNoBasePath;
1639
1640 case CK_BlockPointerToObjCPointerCast:
1641 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1641, __PRETTY_FUNCTION__))
;
1642 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1642, __PRETTY_FUNCTION__))
;
1643 goto CheckNoBasePath;
1644
1645 case CK_ReinterpretMemberPointer:
1646 assert(getType()->isMemberPointerType())((getType()->isMemberPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isMemberPointerType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1646, __PRETTY_FUNCTION__))
;
1647 assert(getSubExpr()->getType()->isMemberPointerType())((getSubExpr()->getType()->isMemberPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1647, __PRETTY_FUNCTION__))
;
1648 goto CheckNoBasePath;
1649
1650 case CK_BitCast:
1651 // Arbitrary casts to C pointer types count as bitcasts.
1652 // Otherwise, we should only have block and ObjC pointer casts
1653 // here if they stay within the type kind.
1654 if (!getType()->isPointerType()) {
1655 assert(getType()->isObjCObjectPointerType() ==((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1656, __PRETTY_FUNCTION__))
1656 getSubExpr()->getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1656, __PRETTY_FUNCTION__))
;
1657 assert(getType()->isBlockPointerType() ==((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1658, __PRETTY_FUNCTION__))
1658 getSubExpr()->getType()->isBlockPointerType())((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1658, __PRETTY_FUNCTION__))
;
1659 }
1660 goto CheckNoBasePath;
1661
1662 case CK_AnyPointerToBlockPointerCast:
1663 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1663, __PRETTY_FUNCTION__))
;
1664 assert(getSubExpr()->getType()->isAnyPointerType() &&((getSubExpr()->getType()->isAnyPointerType() &&
!getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1665, __PRETTY_FUNCTION__))
1665 !getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isAnyPointerType() &&
!getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1665, __PRETTY_FUNCTION__))
;
1666 goto CheckNoBasePath;
1667
1668 case CK_CopyAndAutoreleaseBlockObject:
1669 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1669, __PRETTY_FUNCTION__))
;
1670 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1670, __PRETTY_FUNCTION__))
;
1671 goto CheckNoBasePath;
1672
1673 case CK_FunctionToPointerDecay:
1674 assert(getType()->isPointerType())((getType()->isPointerType()) ? static_cast<void> (0
) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1674, __PRETTY_FUNCTION__))
;
1675 assert(getSubExpr()->getType()->isFunctionType())((getSubExpr()->getType()->isFunctionType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1675, __PRETTY_FUNCTION__))
;
1676 goto CheckNoBasePath;
1677
1678 case CK_AddressSpaceConversion: {
1679 auto Ty = getType();
1680 auto SETy = getSubExpr()->getType();
1681 assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy))((getValueKindForType(Ty) == Expr::getValueKindForType(SETy))
? static_cast<void> (0) : __assert_fail ("getValueKindForType(Ty) == Expr::getValueKindForType(SETy)"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1681, __PRETTY_FUNCTION__))
;
1682 if (/*isRValue()*/ !Ty->getPointeeType().isNull()) {
1683 Ty = Ty->getPointeeType();
1684 SETy = SETy->getPointeeType();
1685 }
1686 assert(!Ty.isNull() && !SETy.isNull() &&((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace()) ? static_cast<void> (0) :
__assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1687, __PRETTY_FUNCTION__))
1687 Ty.getAddressSpace() != SETy.getAddressSpace())((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace()) ? static_cast<void> (0) :
__assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1687, __PRETTY_FUNCTION__))
;
1688 goto CheckNoBasePath;
1689 }
1690 // These should not have an inheritance path.
1691 case CK_Dynamic:
1692 case CK_ToUnion:
1693 case CK_ArrayToPointerDecay:
1694 case CK_NullToMemberPointer:
1695 case CK_NullToPointer:
1696 case CK_ConstructorConversion:
1697 case CK_IntegralToPointer:
1698 case CK_PointerToIntegral:
1699 case CK_ToVoid:
1700 case CK_VectorSplat:
1701 case CK_IntegralCast:
1702 case CK_BooleanToSignedIntegral:
1703 case CK_IntegralToFloating:
1704 case CK_FloatingToIntegral:
1705 case CK_FloatingCast:
1706 case CK_ObjCObjectLValueCast:
1707 case CK_FloatingRealToComplex:
1708 case CK_FloatingComplexToReal:
1709 case CK_FloatingComplexCast:
1710 case CK_FloatingComplexToIntegralComplex:
1711 case CK_IntegralRealToComplex:
1712 case CK_IntegralComplexToReal:
1713 case CK_IntegralComplexCast:
1714 case CK_IntegralComplexToFloatingComplex:
1715 case CK_ARCProduceObject:
1716 case CK_ARCConsumeObject:
1717 case CK_ARCReclaimReturnedObject:
1718 case CK_ARCExtendBlockObject:
1719 case CK_ZeroToOCLOpaqueType:
1720 case CK_IntToOCLSampler:
1721 case CK_FixedPointCast:
1722 case CK_FixedPointToIntegral:
1723 case CK_IntegralToFixedPoint:
1724 assert(!getType()->isBooleanType() && "unheralded conversion to bool")((!getType()->isBooleanType() && "unheralded conversion to bool"
) ? static_cast<void> (0) : __assert_fail ("!getType()->isBooleanType() && \"unheralded conversion to bool\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1724, __PRETTY_FUNCTION__))
;
1725 goto CheckNoBasePath;
1726
1727 case CK_Dependent:
1728 case CK_LValueToRValue:
1729 case CK_NoOp:
1730 case CK_AtomicToNonAtomic:
1731 case CK_NonAtomicToAtomic:
1732 case CK_PointerToBoolean:
1733 case CK_IntegralToBoolean:
1734 case CK_FloatingToBoolean:
1735 case CK_MemberPointerToBoolean:
1736 case CK_FloatingComplexToBoolean:
1737 case CK_IntegralComplexToBoolean:
1738 case CK_LValueBitCast: // -> bool&
1739 case CK_UserDefinedConversion: // operator bool()
1740 case CK_BuiltinFnToFnPtr:
1741 case CK_FixedPointToBoolean:
1742 CheckNoBasePath:
1743 assert(path_empty() && "Cast kind should not have a base path!")((path_empty() && "Cast kind should not have a base path!"
) ? static_cast<void> (0) : __assert_fail ("path_empty() && \"Cast kind should not have a base path!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1743, __PRETTY_FUNCTION__))
;
1744 break;
1745 }
1746 return true;
1747}
1748
1749const char *CastExpr::getCastKindName(CastKind CK) {
1750 switch (CK) {
1751#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1752#include "clang/AST/OperationKinds.def"
1753 }
1754 llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1754)
;
1755}
1756
1757namespace {
1758 const Expr *skipImplicitTemporary(const Expr *E) {
1759 // Skip through reference binding to temporary.
1760 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1761 E = Materialize->GetTemporaryExpr();
1762
1763 // Skip any temporary bindings; they're implicit.
1764 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1765 E = Binder->getSubExpr();
1766
1767 return E;
1768 }
1769}
1770
1771Expr *CastExpr::getSubExprAsWritten() {
1772 const Expr *SubExpr = nullptr;
1773 const CastExpr *E = this;
1774 do {
1775 SubExpr = skipImplicitTemporary(E->getSubExpr());
1776
1777 // Conversions by constructor and conversion functions have a
1778 // subexpression describing the call; strip it off.
1779 if (E->getCastKind() == CK_ConstructorConversion)
1780 SubExpr =
1781 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
1782 else if (E->getCastKind() == CK_UserDefinedConversion) {
1783 assert((isa<CXXMemberCallExpr>(SubExpr) ||(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1785, __PRETTY_FUNCTION__))
1784 isa<BlockExpr>(SubExpr)) &&(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1785, __PRETTY_FUNCTION__))
1785 "Unexpected SubExpr for CK_UserDefinedConversion.")(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1785, __PRETTY_FUNCTION__))
;
1786 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1787 SubExpr = MCE->getImplicitObjectArgument();
1788 }
1789
1790 // If the subexpression we're left with is an implicit cast, look
1791 // through that, too.
1792 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1793
1794 return const_cast<Expr*>(SubExpr);
1795}
1796
1797NamedDecl *CastExpr::getConversionFunction() const {
1798 const Expr *SubExpr = nullptr;
1799
1800 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1801 SubExpr = skipImplicitTemporary(E->getSubExpr());
1802
1803 if (E->getCastKind() == CK_ConstructorConversion)
1804 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1805
1806 if (E->getCastKind() == CK_UserDefinedConversion) {
1807 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1808 return MCE->getMethodDecl();
1809 }
1810 }
1811
1812 return nullptr;
1813}
1814
1815CXXBaseSpecifier **CastExpr::path_buffer() {
1816 switch (getStmtClass()) {
1817#define ABSTRACT_STMT(x)
1818#define CASTEXPR(Type, Base) \
1819 case Stmt::Type##Class: \
1820 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1821#define STMT(Type, Base)
1822#include "clang/AST/StmtNodes.inc"
1823 default:
1824 llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1824)
;
1825 }
1826}
1827
1828const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1829 QualType opType) {
1830 auto RD = unionType->castAs<RecordType>()->getDecl();
1831 return getTargetFieldForToUnionCast(RD, opType);
1832}
1833
1834const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1835 QualType OpType) {
1836 auto &Ctx = RD->getASTContext();
1837 RecordDecl::field_iterator Field, FieldEnd;
1838 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1839 Field != FieldEnd; ++Field) {
1840 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1841 !Field->isUnnamedBitfield()) {
1842 return *Field;
1843 }
1844 }
1845 return nullptr;
1846}
1847
1848ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1849 CastKind Kind, Expr *Operand,
1850 const CXXCastPath *BasePath,
1851 ExprValueKind VK) {
1852 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1853 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1854 ImplicitCastExpr *E =
1855 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1856 if (PathSize)
1857 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1858 E->getTrailingObjects<CXXBaseSpecifier *>());
1859 return E;
1860}
1861
1862ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1863 unsigned PathSize) {
1864 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1865 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1866}
1867
1868
1869CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1870 ExprValueKind VK, CastKind K, Expr *Op,
1871 const CXXCastPath *BasePath,
1872 TypeSourceInfo *WrittenTy,
1873 SourceLocation L, SourceLocation R) {
1874 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1875 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1876 CStyleCastExpr *E =
1877 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1878 if (PathSize)
1879 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1880 E->getTrailingObjects<CXXBaseSpecifier *>());
1881 return E;
1882}
1883
1884CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1885 unsigned PathSize) {
1886 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1887 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1888}
1889
1890/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1891/// corresponds to, e.g. "<<=".
1892StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1893 switch (Op) {
1894#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1895#include "clang/AST/OperationKinds.def"
1896 }
1897 llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1897)
;
1898}
1899
1900BinaryOperatorKind
1901BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1902 switch (OO) {
1903 default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 1903)
;
1904 case OO_Plus: return BO_Add;
1905 case OO_Minus: return BO_Sub;
1906 case OO_Star: return BO_Mul;
1907 case OO_Slash: return BO_Div;
1908 case OO_Percent: return BO_Rem;
1909 case OO_Caret: return BO_Xor;
1910 case OO_Amp: return BO_And;
1911 case OO_Pipe: return BO_Or;
1912 case OO_Equal: return BO_Assign;
1913 case OO_Spaceship: return BO_Cmp;
1914 case OO_Less: return BO_LT;
1915 case OO_Greater: return BO_GT;
1916 case OO_PlusEqual: return BO_AddAssign;
1917 case OO_MinusEqual: return BO_SubAssign;
1918 case OO_StarEqual: return BO_MulAssign;
1919 case OO_SlashEqual: return BO_DivAssign;
1920 case OO_PercentEqual: return BO_RemAssign;
1921 case OO_CaretEqual: return BO_XorAssign;
1922 case OO_AmpEqual: return BO_AndAssign;
1923 case OO_PipeEqual: return BO_OrAssign;
1924 case OO_LessLess: return BO_Shl;
1925 case OO_GreaterGreater: return BO_Shr;
1926 case OO_LessLessEqual: return BO_ShlAssign;
1927 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1928 case OO_EqualEqual: return BO_EQ;
1929 case OO_ExclaimEqual: return BO_NE;
1930 case OO_LessEqual: return BO_LE;
1931 case OO_GreaterEqual: return BO_GE;
1932 case OO_AmpAmp: return BO_LAnd;
1933 case OO_PipePipe: return BO_LOr;
1934 case OO_Comma: return BO_Comma;
1935 case OO_ArrowStar: return BO_PtrMemI;
1936 }
1937}
1938
1939OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1940 static const OverloadedOperatorKind OverOps[] = {
1941 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1942 OO_Star, OO_Slash, OO_Percent,
1943 OO_Plus, OO_Minus,
1944 OO_LessLess, OO_GreaterGreater,
1945 OO_Spaceship,
1946 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1947 OO_EqualEqual, OO_ExclaimEqual,
1948 OO_Amp,
1949 OO_Caret,
1950 OO_Pipe,
1951 OO_AmpAmp,
1952 OO_PipePipe,
1953 OO_Equal, OO_StarEqual,
1954 OO_SlashEqual, OO_PercentEqual,
1955 OO_PlusEqual, OO_MinusEqual,
1956 OO_LessLessEqual, OO_GreaterGreaterEqual,
1957 OO_AmpEqual, OO_CaretEqual,
1958 OO_PipeEqual,
1959 OO_Comma
1960 };
1961 return OverOps[Opc];
1962}
1963
1964bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
1965 Opcode Opc,
1966 Expr *LHS, Expr *RHS) {
1967 if (Opc != BO_Add)
1968 return false;
1969
1970 // Check that we have one pointer and one integer operand.
1971 Expr *PExp;
1972 if (LHS->getType()->isPointerType()) {
1973 if (!RHS->getType()->isIntegerType())
1974 return false;
1975 PExp = LHS;
1976 } else if (RHS->getType()->isPointerType()) {
1977 if (!LHS->getType()->isIntegerType())
1978 return false;
1979 PExp = RHS;
1980 } else {
1981 return false;
1982 }
1983
1984 // Check that the pointer is a nullptr.
1985 if (!PExp->IgnoreParenCasts()
1986 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
1987 return false;
1988
1989 // Check that the pointee type is char-sized.
1990 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
1991 if (!PTy || !PTy->getPointeeType()->isCharType())
1992 return false;
1993
1994 return true;
1995}
1996
1997static QualType getDecayedSourceLocExprType(const ASTContext &Ctx,
1998 SourceLocExpr::IdentKind Kind) {
1999 switch (Kind) {
2000 case SourceLocExpr::File:
2001 case SourceLocExpr::Function: {
2002 QualType ArrTy = Ctx.getStringLiteralArrayType(Ctx.CharTy, 0);
2003 return Ctx.getPointerType(ArrTy->getAsArrayTypeUnsafe()->getElementType());
2004 }
2005 case SourceLocExpr::Line:
2006 case SourceLocExpr::Column:
2007 return Ctx.UnsignedIntTy;
2008 }
2009 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2009)
;
2010}
2011
2012SourceLocExpr::SourceLocExpr(const ASTContext &Ctx, IdentKind Kind,
2013 SourceLocation BLoc, SourceLocation RParenLoc,
2014 DeclContext *ParentContext)
2015 : Expr(SourceLocExprClass, getDecayedSourceLocExprType(Ctx, Kind),
2016 VK_RValue, OK_Ordinary, false, false, false, false),
2017 BuiltinLoc(BLoc), RParenLoc(RParenLoc), ParentContext(ParentContext) {
2018 SourceLocExprBits.Kind = Kind;
2019}
2020
2021StringRef SourceLocExpr::getBuiltinStr() const {
2022 switch (getIdentKind()) {
2023 case File:
2024 return "__builtin_FILE";
2025 case Function:
2026 return "__builtin_FUNCTION";
2027 case Line:
2028 return "__builtin_LINE";
2029 case Column:
2030 return "__builtin_COLUMN";
2031 }
2032 llvm_unreachable("unexpected IdentKind!")::llvm::llvm_unreachable_internal("unexpected IdentKind!", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2032)
;
2033}
2034
2035APValue SourceLocExpr::EvaluateInContext(const ASTContext &Ctx,
2036 const Expr *DefaultExpr) const {
2037 SourceLocation Loc;
2038 const DeclContext *Context;
2039
2040 std::tie(Loc,
2041 Context) = [&]() -> std::pair<SourceLocation, const DeclContext *> {
2042 if (auto *DIE = dyn_cast_or_null<CXXDefaultInitExpr>(DefaultExpr))
2043 return {DIE->getUsedLocation(), DIE->getUsedContext()};
2044 if (auto *DAE = dyn_cast_or_null<CXXDefaultArgExpr>(DefaultExpr))
2045 return {DAE->getUsedLocation(), DAE->getUsedContext()};
2046 return {this->getLocation(), this->getParentContext()};
2047 }();
2048
2049 PresumedLoc PLoc = Ctx.getSourceManager().getPresumedLoc(
2050 Ctx.getSourceManager().getExpansionRange(Loc).getEnd());
2051
2052 auto MakeStringLiteral = [&](StringRef Tmp) {
2053 using LValuePathEntry = APValue::LValuePathEntry;
2054 StringLiteral *Res = Ctx.getPredefinedStringLiteralFromCache(Tmp);
2055 // Decay the string to a pointer to the first character.
2056 LValuePathEntry Path[1] = {LValuePathEntry::ArrayIndex(0)};
2057 return APValue(Res, CharUnits::Zero(), Path, /*OnePastTheEnd=*/false);
2058 };
2059
2060 switch (getIdentKind()) {
2061 case SourceLocExpr::File:
2062 return MakeStringLiteral(PLoc.getFilename());
2063 case SourceLocExpr::Function: {
2064 const Decl *CurDecl = dyn_cast_or_null<Decl>(Context);
2065 return MakeStringLiteral(
2066 CurDecl ? PredefinedExpr::ComputeName(PredefinedExpr::Function, CurDecl)
2067 : std::string(""));
2068 }
2069 case SourceLocExpr::Line:
2070 case SourceLocExpr::Column: {
2071 llvm::APSInt IntVal(Ctx.getIntWidth(Ctx.UnsignedIntTy),
2072 /*IsUnsigned=*/true);
2073 IntVal = getIdentKind() == SourceLocExpr::Line ? PLoc.getLine()
2074 : PLoc.getColumn();
2075 return APValue(IntVal);
2076 }
2077 }
2078 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2078)
;
2079}
2080
2081InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
2082 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
2083 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
2084 false, false),
2085 InitExprs(C, initExprs.size()),
2086 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
2087{
2088 sawArrayRangeDesignator(false);
2089 for (unsigned I = 0; I != initExprs.size(); ++I) {
2090 if (initExprs[I]->isTypeDependent())
2091 ExprBits.TypeDependent = true;
2092 if (initExprs[I]->isValueDependent())
2093 ExprBits.ValueDependent = true;
2094 if (initExprs[I]->isInstantiationDependent())
2095 ExprBits.InstantiationDependent = true;
2096 if (initExprs[I]->containsUnexpandedParameterPack())
2097 ExprBits.ContainsUnexpandedParameterPack = true;
2098 }
2099
2100 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
2101}
2102
2103void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
2104 if (NumInits > InitExprs.size())
2105 InitExprs.reserve(C, NumInits);
2106}
2107
2108void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
2109 InitExprs.resize(C, NumInits, nullptr);
2110}
2111
2112Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
2113 if (Init >= InitExprs.size()) {
2114 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
2115 setInit(Init, expr);
2116 return nullptr;
2117 }
2118
2119 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
2120 setInit(Init, expr);
2121 return Result;
2122}
2123
2124void InitListExpr::setArrayFiller(Expr *filler) {
2125 assert(!hasArrayFiller() && "Filler already set!")((!hasArrayFiller() && "Filler already set!") ? static_cast
<void> (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2125, __PRETTY_FUNCTION__))
;
2126 ArrayFillerOrUnionFieldInit = filler;
2127 // Fill out any "holes" in the array due to designated initializers.
2128 Expr **inits = getInits();
2129 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
2130 if (inits[i] == nullptr)
2131 inits[i] = filler;
2132}
2133
2134bool InitListExpr::isStringLiteralInit() const {
2135 if (getNumInits() != 1)
2136 return false;
2137 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
2138 if (!AT || !AT->getElementType()->isIntegerType())
2139 return false;
2140 // It is possible for getInit() to return null.
2141 const Expr *Init = getInit(0);
2142 if (!Init)
2143 return false;
2144 Init = Init->IgnoreParens();
2145 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2146}
2147
2148bool InitListExpr::isTransparent() const {
2149 assert(isSemanticForm() && "syntactic form never semantically transparent")((isSemanticForm() && "syntactic form never semantically transparent"
) ? static_cast<void> (0) : __assert_fail ("isSemanticForm() && \"syntactic form never semantically transparent\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2149, __PRETTY_FUNCTION__))
;
2150
2151 // A glvalue InitListExpr is always just sugar.
2152 if (isGLValue()) {
2153 assert(getNumInits() == 1 && "multiple inits in glvalue init list")((getNumInits() == 1 && "multiple inits in glvalue init list"
) ? static_cast<void> (0) : __assert_fail ("getNumInits() == 1 && \"multiple inits in glvalue init list\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2153, __PRETTY_FUNCTION__))
;
2154 return true;
2155 }
2156
2157 // Otherwise, we're sugar if and only if we have exactly one initializer that
2158 // is of the same type.
2159 if (getNumInits() != 1 || !getInit(0))
2160 return false;
2161
2162 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2163 // transparent struct copy.
2164 if (!getInit(0)->isRValue() && getType()->isRecordType())
2165 return false;
2166
2167 return getType().getCanonicalType() ==
2168 getInit(0)->getType().getCanonicalType();
2169}
2170
2171bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2172 assert(isSyntacticForm() && "only test syntactic form as zero initializer")((isSyntacticForm() && "only test syntactic form as zero initializer"
) ? static_cast<void> (0) : __assert_fail ("isSyntacticForm() && \"only test syntactic form as zero initializer\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2172, __PRETTY_FUNCTION__))
;
2173
2174 if (LangOpts.CPlusPlus || getNumInits() != 1) {
2175 return false;
2176 }
2177
2178 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0));
2179 return Lit && Lit->getValue() == 0;
2180}
2181
2182SourceLocation InitListExpr::getBeginLoc() const {
2183 if (InitListExpr *SyntacticForm = getSyntacticForm())
2184 return SyntacticForm->getBeginLoc();
2185 SourceLocation Beg = LBraceLoc;
2186 if (Beg.isInvalid()) {
2187 // Find the first non-null initializer.
2188 for (InitExprsTy::const_iterator I = InitExprs.begin(),
2189 E = InitExprs.end();
2190 I != E; ++I) {
2191 if (Stmt *S = *I) {
2192 Beg = S->getBeginLoc();
2193 break;
2194 }
2195 }
2196 }
2197 return Beg;
2198}
2199
2200SourceLocation InitListExpr::getEndLoc() const {
2201 if (InitListExpr *SyntacticForm = getSyntacticForm())
2202 return SyntacticForm->getEndLoc();
2203 SourceLocation End = RBraceLoc;
2204 if (End.isInvalid()) {
2205 // Find the first non-null initializer from the end.
2206 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2207 E = InitExprs.rend();
2208 I != E; ++I) {
2209 if (Stmt *S = *I) {
2210 End = S->getEndLoc();
2211 break;
2212 }
2213 }
2214 }
2215 return End;
2216}
2217
2218/// getFunctionType - Return the underlying function type for this block.
2219///
2220const FunctionProtoType *BlockExpr::getFunctionType() const {
2221 // The block pointer is never sugared, but the function type might be.
2222 return cast<BlockPointerType>(getType())
2223 ->getPointeeType()->castAs<FunctionProtoType>();
2224}
2225
2226SourceLocation BlockExpr::getCaretLocation() const {
2227 return TheBlock->getCaretLocation();
2228}
2229const Stmt *BlockExpr::getBody() const {
2230 return TheBlock->getBody();
2231}
2232Stmt *BlockExpr::getBody() {
2233 return TheBlock->getBody();
2234}
2235
2236
2237//===----------------------------------------------------------------------===//
2238// Generic Expression Routines
2239//===----------------------------------------------------------------------===//
2240
2241/// isUnusedResultAWarning - Return true if this immediate expression should
2242/// be warned about if the result is unused. If so, fill in Loc and Ranges
2243/// with location to warn on and the source range[s] to report with the
2244/// warning.
2245bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2246 SourceRange &R1, SourceRange &R2,
2247 ASTContext &Ctx) const {
2248 // Don't warn if the expr is type dependent. The type could end up
2249 // instantiating to void.
2250 if (isTypeDependent())
2251 return false;
2252
2253 switch (getStmtClass()) {
2254 default:
2255 if (getType()->isVoidType())
2256 return false;
2257 WarnE = this;
2258 Loc = getExprLoc();
2259 R1 = getSourceRange();
2260 return true;
2261 case ParenExprClass:
2262 return cast<ParenExpr>(this)->getSubExpr()->
2263 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2264 case GenericSelectionExprClass:
2265 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2266 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2267 case CoawaitExprClass:
2268 case CoyieldExprClass:
2269 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
2270 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2271 case ChooseExprClass:
2272 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2273 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2274 case UnaryOperatorClass: {
2275 const UnaryOperator *UO = cast<UnaryOperator>(this);
2276
2277 switch (UO->getOpcode()) {
2278 case UO_Plus:
2279 case UO_Minus:
2280 case UO_AddrOf:
2281 case UO_Not:
2282 case UO_LNot:
2283 case UO_Deref:
2284 break;
2285 case UO_Coawait:
2286 // This is just the 'operator co_await' call inside the guts of a
2287 // dependent co_await call.
2288 case UO_PostInc:
2289 case UO_PostDec:
2290 case UO_PreInc:
2291 case UO_PreDec: // ++/--
2292 return false; // Not a warning.
2293 case UO_Real:
2294 case UO_Imag:
2295 // accessing a piece of a volatile complex is a side-effect.
2296 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2297 .isVolatileQualified())
2298 return false;
2299 break;
2300 case UO_Extension:
2301 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2302 }
2303 WarnE = this;
2304 Loc = UO->getOperatorLoc();
2305 R1 = UO->getSubExpr()->getSourceRange();
2306 return true;
2307 }
2308 case BinaryOperatorClass: {
2309 const BinaryOperator *BO = cast<BinaryOperator>(this);
2310 switch (BO->getOpcode()) {
2311 default:
2312 break;
2313 // Consider the RHS of comma for side effects. LHS was checked by
2314 // Sema::CheckCommaOperands.
2315 case BO_Comma:
2316 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2317 // lvalue-ness) of an assignment written in a macro.
2318 if (IntegerLiteral *IE =
2319 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2320 if (IE->getValue() == 0)
2321 return false;
2322 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2323 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2324 case BO_LAnd:
2325 case BO_LOr:
2326 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2327 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2328 return false;
2329 break;
2330 }
2331 if (BO->isAssignmentOp())
2332 return false;
2333 WarnE = this;
2334 Loc = BO->getOperatorLoc();
2335 R1 = BO->getLHS()->getSourceRange();
2336 R2 = BO->getRHS()->getSourceRange();
2337 return true;
2338 }
2339 case CompoundAssignOperatorClass:
2340 case VAArgExprClass:
2341 case AtomicExprClass:
2342 return false;
2343
2344 case ConditionalOperatorClass: {
2345 // If only one of the LHS or RHS is a warning, the operator might
2346 // be being used for control flow. Only warn if both the LHS and
2347 // RHS are warnings.
2348 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2349 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2350 return false;
2351 if (!Exp->getLHS())
2352 return true;
2353 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2354 }
2355
2356 case MemberExprClass:
2357 WarnE = this;
2358 Loc = cast<MemberExpr>(this)->getMemberLoc();
2359 R1 = SourceRange(Loc, Loc);
2360 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2361 return true;
2362
2363 case ArraySubscriptExprClass:
2364 WarnE = this;
2365 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2366 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2367 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2368 return true;
2369
2370 case CXXOperatorCallExprClass: {
2371 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2372 // overloads as there is no reasonable way to define these such that they
2373 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2374 // warning: operators == and != are commonly typo'ed, and so warning on them
2375 // provides additional value as well. If this list is updated,
2376 // DiagnoseUnusedComparison should be as well.
2377 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2378 switch (Op->getOperator()) {
2379 default:
2380 break;
2381 case OO_EqualEqual:
2382 case OO_ExclaimEqual:
2383 case OO_Less:
2384 case OO_Greater:
2385 case OO_GreaterEqual:
2386 case OO_LessEqual:
2387 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2388 Op->getCallReturnType(Ctx)->isVoidType())
2389 break;
2390 WarnE = this;
2391 Loc = Op->getOperatorLoc();
2392 R1 = Op->getSourceRange();
2393 return true;
2394 }
2395
2396 // Fallthrough for generic call handling.
2397 LLVM_FALLTHROUGH[[clang::fallthrough]];
2398 }
2399 case CallExprClass:
2400 case CXXMemberCallExprClass:
2401 case UserDefinedLiteralClass: {
2402 // If this is a direct call, get the callee.
2403 const CallExpr *CE = cast<CallExpr>(this);
2404 if (const Decl *FD = CE->getCalleeDecl()) {
2405 // If the callee has attribute pure, const, or warn_unused_result, warn
2406 // about it. void foo() { strlen("bar"); } should warn.
2407 //
2408 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2409 // updated to match for QoI.
2410 if (CE->hasUnusedResultAttr(Ctx) ||
2411 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2412 WarnE = this;
2413 Loc = CE->getCallee()->getBeginLoc();
2414 R1 = CE->getCallee()->getSourceRange();
2415
2416 if (unsigned NumArgs = CE->getNumArgs())
2417 R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
2418 CE->getArg(NumArgs - 1)->getEndLoc());
2419 return true;
2420 }
2421 }
2422 return false;
2423 }
2424
2425 // If we don't know precisely what we're looking at, let's not warn.
2426 case UnresolvedLookupExprClass:
2427 case CXXUnresolvedConstructExprClass:
2428 return false;
2429
2430 case CXXTemporaryObjectExprClass:
2431 case CXXConstructExprClass: {
2432 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2433 if (Type->hasAttr<WarnUnusedAttr>()) {
2434 WarnE = this;
2435 Loc = getBeginLoc();
2436 R1 = getSourceRange();
2437 return true;
2438 }
2439 }
2440 return false;
2441 }
2442
2443 case ObjCMessageExprClass: {
2444 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2445 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2446 ME->isInstanceMessage() &&
2447 !ME->getType()->isVoidType() &&
2448 ME->getMethodFamily() == OMF_init) {
2449 WarnE = this;
2450 Loc = getExprLoc();
2451 R1 = ME->getSourceRange();
2452 return true;
2453 }
2454
2455 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2456 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2457 WarnE = this;
2458 Loc = getExprLoc();
2459 return true;
2460 }
2461
2462 return false;
2463 }
2464
2465 case ObjCPropertyRefExprClass:
2466 WarnE = this;
2467 Loc = getExprLoc();
2468 R1 = getSourceRange();
2469 return true;
2470
2471 case PseudoObjectExprClass: {
2472 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2473
2474 // Only complain about things that have the form of a getter.
2475 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2476 isa<BinaryOperator>(PO->getSyntacticForm()))
2477 return false;
2478
2479 WarnE = this;
2480 Loc = getExprLoc();
2481 R1 = getSourceRange();
2482 return true;
2483 }
2484
2485 case StmtExprClass: {
2486 // Statement exprs don't logically have side effects themselves, but are
2487 // sometimes used in macros in ways that give them a type that is unused.
2488 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2489 // however, if the result of the stmt expr is dead, we don't want to emit a
2490 // warning.
2491 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2492 if (!CS->body_empty()) {
2493 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2494 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2495 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2496 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2497 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2498 }
2499
2500 if (getType()->isVoidType())
2501 return false;
2502 WarnE = this;
2503 Loc = cast<StmtExpr>(this)->getLParenLoc();
2504 R1 = getSourceRange();
2505 return true;
2506 }
2507 case CXXFunctionalCastExprClass:
2508 case CStyleCastExprClass: {
2509 // Ignore an explicit cast to void unless the operand is a non-trivial
2510 // volatile lvalue.
2511 const CastExpr *CE = cast<CastExpr>(this);
2512 if (CE->getCastKind() == CK_ToVoid) {
2513 if (CE->getSubExpr()->isGLValue() &&
2514 CE->getSubExpr()->getType().isVolatileQualified()) {
2515 const DeclRefExpr *DRE =
2516 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2517 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2518 cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
2519 !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
2520 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2521 R1, R2, Ctx);
2522 }
2523 }
2524 return false;
2525 }
2526
2527 // If this is a cast to a constructor conversion, check the operand.
2528 // Otherwise, the result of the cast is unused.
2529 if (CE->getCastKind() == CK_ConstructorConversion)
2530 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2531
2532 WarnE = this;
2533 if (const CXXFunctionalCastExpr *CXXCE =
2534 dyn_cast<CXXFunctionalCastExpr>(this)) {
2535 Loc = CXXCE->getBeginLoc();
2536 R1 = CXXCE->getSubExpr()->getSourceRange();
2537 } else {
2538 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2539 Loc = CStyleCE->getLParenLoc();
2540 R1 = CStyleCE->getSubExpr()->getSourceRange();
2541 }
2542 return true;
2543 }
2544 case ImplicitCastExprClass: {
2545 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2546
2547 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2548 if (ICE->getCastKind() == CK_LValueToRValue &&
2549 ICE->getSubExpr()->getType().isVolatileQualified())
2550 return false;
2551
2552 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2553 }
2554 case CXXDefaultArgExprClass:
2555 return (cast<CXXDefaultArgExpr>(this)
2556 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2557 case CXXDefaultInitExprClass:
2558 return (cast<CXXDefaultInitExpr>(this)
2559 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2560
2561 case CXXNewExprClass:
2562 // FIXME: In theory, there might be new expressions that don't have side
2563 // effects (e.g. a placement new with an uninitialized POD).
2564 case CXXDeleteExprClass:
2565 return false;
2566 case MaterializeTemporaryExprClass:
2567 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2568 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2569 case CXXBindTemporaryExprClass:
2570 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2571 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2572 case ExprWithCleanupsClass:
2573 return cast<ExprWithCleanups>(this)->getSubExpr()
2574 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2575 }
2576}
2577
2578/// isOBJCGCCandidate - Check if an expression is objc gc'able.
2579/// returns true, if it is; false otherwise.
2580bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2581 const Expr *E = IgnoreParens();
2582 switch (E->getStmtClass()) {
2583 default:
2584 return false;
2585 case ObjCIvarRefExprClass:
2586 return true;
2587 case Expr::UnaryOperatorClass:
2588 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2589 case ImplicitCastExprClass:
2590 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2591 case MaterializeTemporaryExprClass:
2592 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2593 ->isOBJCGCCandidate(Ctx);
2594 case CStyleCastExprClass:
2595 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2596 case DeclRefExprClass: {
2597 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2598
2599 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2600 if (VD->hasGlobalStorage())
2601 return true;
2602 QualType T = VD->getType();
2603 // dereferencing to a pointer is always a gc'able candidate,
2604 // unless it is __weak.
2605 return T->isPointerType() &&
2606 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2607 }
2608 return false;
2609 }
2610 case MemberExprClass: {
2611 const MemberExpr *M = cast<MemberExpr>(E);
2612 return M->getBase()->isOBJCGCCandidate(Ctx);
2613 }
2614 case ArraySubscriptExprClass:
2615 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2616 }
2617}
2618
2619bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2620 if (isTypeDependent())
2621 return false;
2622 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2623}
2624
2625QualType Expr::findBoundMemberType(const Expr *expr) {
2626 assert(expr->hasPlaceholderType(BuiltinType::BoundMember))((expr->hasPlaceholderType(BuiltinType::BoundMember)) ? static_cast
<void> (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2626, __PRETTY_FUNCTION__))
;
2627
2628 // Bound member expressions are always one of these possibilities:
2629 // x->m x.m x->*y x.*y
2630 // (possibly parenthesized)
2631
2632 expr = expr->IgnoreParens();
2633 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2634 assert(isa<CXXMethodDecl>(mem->getMemberDecl()))((isa<CXXMethodDecl>(mem->getMemberDecl())) ? static_cast
<void> (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2634, __PRETTY_FUNCTION__))
;
2635 return mem->getMemberDecl()->getType();
2636 }
2637
2638 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2639 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2640 ->getPointeeType();
2641 assert(type->isFunctionType())((type->isFunctionType()) ? static_cast<void> (0) : __assert_fail
("type->isFunctionType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2641, __PRETTY_FUNCTION__))
;
2642 return type;
2643 }
2644
2645 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr))((isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr
>(expr)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr)"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2645, __PRETTY_FUNCTION__))
;
2646 return QualType();
2647}
2648
2649static Expr *IgnoreImpCastsSingleStep(Expr *E) {
2650 if (auto *ICE = dyn_cast<ImplicitCastExpr>(E))
2651 return ICE->getSubExpr();
2652
2653 if (auto *FE = dyn_cast<FullExpr>(E))
2654 return FE->getSubExpr();
2655
2656 return E;
2657}
2658
2659static Expr *IgnoreImpCastsExtraSingleStep(Expr *E) {
2660 // FIXME: Skip MaterializeTemporaryExpr and SubstNonTypeTemplateParmExpr in
2661 // addition to what IgnoreImpCasts() skips to account for the current
2662 // behaviour of IgnoreParenImpCasts().
2663 Expr *SubE = IgnoreImpCastsSingleStep(E);
2664 if (SubE != E)
2665 return SubE;
2666
2667 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2668 return MTE->GetTemporaryExpr();
2669
2670 if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2671 return NTTP->getReplacement();
2672
2673 return E;
2674}
2675
2676static Expr *IgnoreCastsSingleStep(Expr *E) {
2677 if (auto *CE = dyn_cast<CastExpr>(E))
2678 return CE->getSubExpr();
2679
2680 if (auto *FE = dyn_cast<FullExpr>(E))
2681 return FE->getSubExpr();
2682
2683 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2684 return MTE->GetTemporaryExpr();
2685
2686 if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2687 return NTTP->getReplacement();
2688
2689 return E;
2690}
2691
2692static Expr *IgnoreLValueCastsSingleStep(Expr *E) {
2693 // Skip what IgnoreCastsSingleStep skips, except that only
2694 // lvalue-to-rvalue casts are skipped.
2695 if (auto *CE = dyn_cast<CastExpr>(E))
2696 if (CE->getCastKind() != CK_LValueToRValue)
2697 return E;
2698
2699 return IgnoreCastsSingleStep(E);
2700}
2701
2702static Expr *IgnoreBaseCastsSingleStep(Expr *E) {
2703 if (auto *CE = dyn_cast<CastExpr>(E))
2704 if (CE->getCastKind() == CK_DerivedToBase ||
2705 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2706 CE->getCastKind() == CK_NoOp)
2707 return CE->getSubExpr();
2708
2709 return E;
2710}
2711
2712static Expr *IgnoreImplicitSingleStep(Expr *E) {
2713 Expr *SubE = IgnoreImpCastsSingleStep(E);
2714 if (SubE != E)
2715 return SubE;
2716
2717 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2718 return MTE->GetTemporaryExpr();
2719
2720 if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(E))
2721 return BTE->getSubExpr();
2722
2723 return E;
2724}
2725
2726static Expr *IgnoreParensSingleStep(Expr *E) {
2727 if (auto *PE = dyn_cast<ParenExpr>(E))
2728 return PE->getSubExpr();
2729
2730 if (auto *UO = dyn_cast<UnaryOperator>(E)) {
2731 if (UO->getOpcode() == UO_Extension)
2732 return UO->getSubExpr();
2733 }
2734
2735 else if (auto *GSE = dyn_cast<GenericSelectionExpr>(E)) {
2736 if (!GSE->isResultDependent())
2737 return GSE->getResultExpr();
2738 }
2739
2740 else if (auto *CE = dyn_cast<ChooseExpr>(E)) {
2741 if (!CE->isConditionDependent())
2742 return CE->getChosenSubExpr();
2743 }
2744
2745 else if (auto *CE = dyn_cast<ConstantExpr>(E))
2746 return CE->getSubExpr();
2747
2748 return E;
2749}
2750
2751static Expr *IgnoreNoopCastsSingleStep(const ASTContext &Ctx, Expr *E) {
2752 if (auto *CE = dyn_cast<CastExpr>(E)) {
2753 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2754 // ptr<->int casts of the same width. We also ignore all identity casts.
2755 Expr *SubExpr = CE->getSubExpr();
2756 bool IsIdentityCast =
2757 Ctx.hasSameUnqualifiedType(E->getType(), SubExpr->getType());
2758 bool IsSameWidthCast =
2759 (E->getType()->isPointerType() || E->getType()->isIntegralType(Ctx)) &&
2760 (SubExpr->getType()->isPointerType() ||
2761 SubExpr->getType()->isIntegralType(Ctx)) &&
2762 (Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SubExpr->getType()));
2763
2764 if (IsIdentityCast || IsSameWidthCast)
2765 return SubExpr;
2766 }
2767
2768 else if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2769 return NTTP->getReplacement();
2770
2771 return E;
2772}
2773
2774static Expr *IgnoreExprNodesImpl(Expr *E) { return E; }
2775template <typename FnTy, typename... FnTys>
2776static Expr *IgnoreExprNodesImpl(Expr *E, FnTy &&Fn, FnTys &&... Fns) {
2777 return IgnoreExprNodesImpl(Fn(E), std::forward<FnTys>(Fns)...);
2778}
2779
2780/// Given an expression E and functions Fn_1,...,Fn_n : Expr * -> Expr *,
2781/// Recursively apply each of the functions to E until reaching a fixed point.
2782/// Note that a null E is valid; in this case nothing is done.
2783template <typename... FnTys>
2784static Expr *IgnoreExprNodes(Expr *E, FnTys &&... Fns) {
2785 Expr *LastE = nullptr;
2786 while (E != LastE) {
2787 LastE = E;
2788 E = IgnoreExprNodesImpl(E, std::forward<FnTys>(Fns)...);
2789 }
2790 return E;
2791}
2792
2793Expr *Expr::IgnoreImpCasts() {
2794 return IgnoreExprNodes(this, IgnoreImpCastsSingleStep);
2795}
2796
2797Expr *Expr::IgnoreCasts() {
2798 return IgnoreExprNodes(this, IgnoreCastsSingleStep);
2799}
2800
2801Expr *Expr::IgnoreImplicit() {
2802 return IgnoreExprNodes(this, IgnoreImplicitSingleStep);
2803}
2804
2805Expr *Expr::IgnoreParens() {
2806 return IgnoreExprNodes(this, IgnoreParensSingleStep);
2807}
2808
2809Expr *Expr::IgnoreParenImpCasts() {
2810 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2811 IgnoreImpCastsExtraSingleStep);
2812}
2813
2814Expr *Expr::IgnoreParenCasts() {
2815 return IgnoreExprNodes(this, IgnoreParensSingleStep, IgnoreCastsSingleStep);
2816}
2817
2818Expr *Expr::IgnoreConversionOperator() {
2819 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2820 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2821 return MCE->getImplicitObjectArgument();
2822 }
2823 return this;
2824}
2825
2826Expr *Expr::IgnoreParenLValueCasts() {
2827 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2828 IgnoreLValueCastsSingleStep);
2829}
2830
2831Expr *Expr::ignoreParenBaseCasts() {
2832 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2833 IgnoreBaseCastsSingleStep);
2834}
2835
2836Expr *Expr::IgnoreParenNoopCasts(const ASTContext &Ctx) {
2837 return IgnoreExprNodes(this, IgnoreParensSingleStep, [&Ctx](Expr *E) {
2838 return IgnoreNoopCastsSingleStep(Ctx, E);
2839 });
2840}
2841
2842bool Expr::isDefaultArgument() const {
2843 const Expr *E = this;
2844 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2845 E = M->GetTemporaryExpr();
2846
2847 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2848 E = ICE->getSubExprAsWritten();
2849
2850 return isa<CXXDefaultArgExpr>(E);
2851}
2852
2853/// Skip over any no-op casts and any temporary-binding
2854/// expressions.
2855static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2856 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2857 E = M->GetTemporaryExpr();
2858
2859 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2860 if (ICE->getCastKind() == CK_NoOp)
2861 E = ICE->getSubExpr();
2862 else
2863 break;
2864 }
2865
2866 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2867 E = BE->getSubExpr();
2868
2869 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2870 if (ICE->getCastKind() == CK_NoOp)
2871 E = ICE->getSubExpr();
2872 else
2873 break;
2874 }
2875
2876 return E->IgnoreParens();
2877}
2878
2879/// isTemporaryObject - Determines if this expression produces a
2880/// temporary of the given class type.
2881bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2882 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2883 return false;
2884
2885 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2886
2887 // Temporaries are by definition pr-values of class type.
2888 if (!E->Classify(C).isPRValue()) {
2889 // In this context, property reference is a message call and is pr-value.
2890 if (!isa<ObjCPropertyRefExpr>(E))
2891 return false;
2892 }
2893
2894 // Black-list a few cases which yield pr-values of class type that don't
2895 // refer to temporaries of that type:
2896
2897 // - implicit derived-to-base conversions
2898 if (isa<ImplicitCastExpr>(E)) {
2899 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2900 case CK_DerivedToBase:
2901 case CK_UncheckedDerivedToBase:
2902 return false;
2903 default:
2904 break;
2905 }
2906 }
2907
2908 // - member expressions (all)
2909 if (isa<MemberExpr>(E))
2910 return false;
2911
2912 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2913 if (BO->isPtrMemOp())
2914 return false;
2915
2916 // - opaque values (all)
2917 if (isa<OpaqueValueExpr>(E))
2918 return false;
2919
2920 return true;
2921}
2922
2923bool Expr::isImplicitCXXThis() const {
2924 const Expr *E = this;
2925
2926 // Strip away parentheses and casts we don't care about.
2927 while (true) {
2928 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2929 E = Paren->getSubExpr();
2930 continue;
2931 }
2932
2933 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2934 if (ICE->getCastKind() == CK_NoOp ||
2935 ICE->getCastKind() == CK_LValueToRValue ||
2936 ICE->getCastKind() == CK_DerivedToBase ||
2937 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2938 E = ICE->getSubExpr();
2939 continue;
2940 }
2941 }
2942
2943 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2944 if (UnOp->getOpcode() == UO_Extension) {
2945 E = UnOp->getSubExpr();
2946 continue;
2947 }
2948 }
2949
2950 if (const MaterializeTemporaryExpr *M
2951 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2952 E = M->GetTemporaryExpr();
2953 continue;
2954 }
2955
2956 break;
2957 }
2958
2959 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2960 return This->isImplicit();
2961
2962 return false;
2963}
2964
2965/// hasAnyTypeDependentArguments - Determines if any of the expressions
2966/// in Exprs is type-dependent.
2967bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2968 for (unsigned I = 0; I < Exprs.size(); ++I)
2969 if (Exprs[I]->isTypeDependent())
2970 return true;
2971
2972 return false;
2973}
2974
2975bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2976 const Expr **Culprit) const {
2977 assert(!isValueDependent() &&((!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2978, __PRETTY_FUNCTION__))
2978 "Expression evaluator can't be called on a dependent expression.")((!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 2978, __PRETTY_FUNCTION__))
;
2979
2980 // This function is attempting whether an expression is an initializer
2981 // which can be evaluated at compile-time. It very closely parallels
2982 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2983 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2984 // to isEvaluatable most of the time.
2985 //
2986 // If we ever capture reference-binding directly in the AST, we can
2987 // kill the second parameter.
2988
2989 if (IsForRef) {
2990 EvalResult Result;
2991 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2992 return true;
2993 if (Culprit)
2994 *Culprit = this;
2995 return false;
2996 }
2997
2998 switch (getStmtClass()) {
2999 default: break;
3000 case StringLiteralClass:
3001 case ObjCEncodeExprClass:
3002 return true;
3003 case CXXTemporaryObjectExprClass:
3004 case CXXConstructExprClass: {
3005 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3006
3007 if (CE->getConstructor()->isTrivial() &&
3008 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
3009 // Trivial default constructor
3010 if (!CE->getNumArgs()) return true;
3011
3012 // Trivial copy constructor
3013 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument")((CE->getNumArgs() == 1 && "trivial ctor with > 1 argument"
) ? static_cast<void> (0) : __assert_fail ("CE->getNumArgs() == 1 && \"trivial ctor with > 1 argument\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3013, __PRETTY_FUNCTION__))
;
3014 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
3015 }
3016
3017 break;
3018 }
3019 case ConstantExprClass: {
3020 // FIXME: We should be able to return "true" here, but it can lead to extra
3021 // error messages. E.g. in Sema/array-init.c.
3022 const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
3023 return Exp->isConstantInitializer(Ctx, false, Culprit);
3024 }
3025 case CompoundLiteralExprClass: {
3026 // This handles gcc's extension that allows global initializers like
3027 // "struct x {int x;} x = (struct x) {};".
3028 // FIXME: This accepts other cases it shouldn't!
3029 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
3030 return Exp->isConstantInitializer(Ctx, false, Culprit);
3031 }
3032 case DesignatedInitUpdateExprClass: {
3033 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
3034 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
3035 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
3036 }
3037 case InitListExprClass: {
3038 const InitListExpr *ILE = cast<InitListExpr>(this);
3039 assert(ILE->isSemanticForm() && "InitListExpr must be in semantic form")((ILE->isSemanticForm() && "InitListExpr must be in semantic form"
) ? static_cast<void> (0) : __assert_fail ("ILE->isSemanticForm() && \"InitListExpr must be in semantic form\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3039, __PRETTY_FUNCTION__))
;
3040 if (ILE->getType()->isArrayType()) {
3041 unsigned numInits = ILE->getNumInits();
3042 for (unsigned i = 0; i < numInits; i++) {
3043 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
3044 return false;
3045 }
3046 return true;
3047 }
3048
3049 if (ILE->getType()->isRecordType()) {
3050 unsigned ElementNo = 0;
3051 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
3052 for (const auto *Field : RD->fields()) {
3053 // If this is a union, skip all the fields that aren't being initialized.
3054 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
3055 continue;
3056
3057 // Don't emit anonymous bitfields, they just affect layout.
3058 if (Field->isUnnamedBitfield())
3059 continue;
3060
3061 if (ElementNo < ILE->getNumInits()) {
3062 const Expr *Elt = ILE->getInit(ElementNo++);
3063 if (Field->isBitField()) {
3064 // Bitfields have to evaluate to an integer.
3065 EvalResult Result;
3066 if (!Elt->EvaluateAsInt(Result, Ctx)) {
3067 if (Culprit)
3068 *Culprit = Elt;
3069 return false;
3070 }
3071 } else {
3072 bool RefType = Field->getType()->isReferenceType();
3073 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
3074 return false;
3075 }
3076 }
3077 }
3078 return true;
3079 }
3080
3081 break;
3082 }
3083 case ImplicitValueInitExprClass:
3084 case NoInitExprClass:
3085 return true;
3086 case ParenExprClass:
3087 return cast<ParenExpr>(this)->getSubExpr()
3088 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3089 case GenericSelectionExprClass:
3090 return cast<GenericSelectionExpr>(this)->getResultExpr()
3091 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3092 case ChooseExprClass:
3093 if (cast<ChooseExpr>(this)->isConditionDependent()) {
3094 if (Culprit)
3095 *Culprit = this;
3096 return false;
3097 }
3098 return cast<ChooseExpr>(this)->getChosenSubExpr()
3099 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3100 case UnaryOperatorClass: {
3101 const UnaryOperator* Exp = cast<UnaryOperator>(this);
3102 if (Exp->getOpcode() == UO_Extension)
3103 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3104 break;
3105 }
3106 case CXXFunctionalCastExprClass:
3107 case CXXStaticCastExprClass:
3108 case ImplicitCastExprClass:
3109 case CStyleCastExprClass:
3110 case ObjCBridgedCastExprClass:
3111 case CXXDynamicCastExprClass:
3112 case CXXReinterpretCastExprClass:
3113 case CXXConstCastExprClass: {
3114 const CastExpr *CE = cast<CastExpr>(this);
3115
3116 // Handle misc casts we want to ignore.
3117 if (CE->getCastKind() == CK_NoOp ||
3118 CE->getCastKind() == CK_LValueToRValue ||
3119 CE->getCastKind() == CK_ToUnion ||
3120 CE->getCastKind() == CK_ConstructorConversion ||
3121 CE->getCastKind() == CK_NonAtomicToAtomic ||
3122 CE->getCastKind() == CK_AtomicToNonAtomic ||
3123 CE->getCastKind() == CK_IntToOCLSampler)
3124 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3125
3126 break;
3127 }
3128 case MaterializeTemporaryExprClass:
3129 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
3130 ->isConstantInitializer(Ctx, false, Culprit);
3131
3132 case SubstNonTypeTemplateParmExprClass:
3133 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
3134 ->isConstantInitializer(Ctx, false, Culprit);
3135 case CXXDefaultArgExprClass:
3136 return cast<CXXDefaultArgExpr>(this)->getExpr()
3137 ->isConstantInitializer(Ctx, false, Culprit);
3138 case CXXDefaultInitExprClass:
3139 return cast<CXXDefaultInitExpr>(this)->getExpr()
3140 ->isConstantInitializer(Ctx, false, Culprit);
3141 }
3142 // Allow certain forms of UB in constant initializers: signed integer
3143 // overflow and floating-point division by zero. We'll give a warning on
3144 // these, but they're common enough that we have to accept them.
3145 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
3146 return true;
3147 if (Culprit)
3148 *Culprit = this;
3149 return false;
3150}
3151
3152bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
3153 const FunctionDecl* FD = getDirectCallee();
3154 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
3155 FD->getBuiltinID() != Builtin::BI__builtin_assume))
3156 return false;
3157
3158 const Expr* Arg = getArg(0);
3159 bool ArgVal;
3160 return !Arg->isValueDependent() &&
3161 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3162}
3163
3164namespace {
3165 /// Look for any side effects within a Stmt.
3166 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
3167 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
3168 const bool IncludePossibleEffects;
3169 bool HasSideEffects;
3170
3171 public:
3172 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
3173 : Inherited(Context),
3174 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
3175
3176 bool hasSideEffects() const { return HasSideEffects; }
3177
3178 void VisitExpr(const Expr *E) {
3179 if (!HasSideEffects &&
3180 E->HasSideEffects(Context, IncludePossibleEffects))
3181 HasSideEffects = true;
3182 }
3183 };
3184}
3185
3186bool Expr::HasSideEffects(const ASTContext &Ctx,
3187 bool IncludePossibleEffects) const {
3188 // In circumstances where we care about definite side effects instead of
3189 // potential side effects, we want to ignore expressions that are part of a
3190 // macro expansion as a potential side effect.
3191 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3192 return false;
3193
3194 if (isInstantiationDependent())
3195 return IncludePossibleEffects;
3196
3197 switch (getStmtClass()) {
3198 case NoStmtClass:
3199 #define ABSTRACT_STMT(Type)
3200 #define STMT(Type, Base) case Type##Class:
3201 #define EXPR(Type, Base)
3202 #include "clang/AST/StmtNodes.inc"
3203 llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3203)
;
3204
3205 case DependentScopeDeclRefExprClass:
3206 case CXXUnresolvedConstructExprClass:
3207 case CXXDependentScopeMemberExprClass:
3208 case UnresolvedLookupExprClass:
3209 case UnresolvedMemberExprClass:
3210 case PackExpansionExprClass:
3211 case SubstNonTypeTemplateParmPackExprClass:
3212 case FunctionParmPackExprClass:
3213 case TypoExprClass:
3214 case CXXFoldExprClass:
3215 llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3215)
;
3216
3217 case DeclRefExprClass:
3218 case ObjCIvarRefExprClass:
3219 case PredefinedExprClass:
3220 case IntegerLiteralClass:
3221 case FixedPointLiteralClass:
3222 case FloatingLiteralClass:
3223 case ImaginaryLiteralClass:
3224 case StringLiteralClass:
3225 case CharacterLiteralClass:
3226 case OffsetOfExprClass:
3227 case ImplicitValueInitExprClass:
3228 case UnaryExprOrTypeTraitExprClass:
3229 case AddrLabelExprClass:
3230 case GNUNullExprClass:
3231 case ArrayInitIndexExprClass:
3232 case NoInitExprClass:
3233 case CXXBoolLiteralExprClass:
3234 case CXXNullPtrLiteralExprClass:
3235 case CXXThisExprClass:
3236 case CXXScalarValueInitExprClass:
3237 case TypeTraitExprClass:
3238 case ArrayTypeTraitExprClass:
3239 case ExpressionTraitExprClass:
3240 case CXXNoexceptExprClass:
3241 case SizeOfPackExprClass:
3242 case ObjCStringLiteralClass:
3243 case ObjCEncodeExprClass:
3244 case ObjCBoolLiteralExprClass:
3245 case ObjCAvailabilityCheckExprClass:
3246 case CXXUuidofExprClass:
3247 case OpaqueValueExprClass:
3248 case SourceLocExprClass:
3249 // These never have a side-effect.
3250 return false;
3251
3252 case ConstantExprClass:
3253 // FIXME: Move this into the "return false;" block above.
3254 return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
3255 Ctx, IncludePossibleEffects);
3256
3257 case CallExprClass:
3258 case CXXOperatorCallExprClass:
3259 case CXXMemberCallExprClass:
3260 case CUDAKernelCallExprClass:
3261 case UserDefinedLiteralClass: {
3262 // We don't know a call definitely has side effects, except for calls
3263 // to pure/const functions that definitely don't.
3264 // If the call itself is considered side-effect free, check the operands.
3265 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3266 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3267 if (IsPure || !IncludePossibleEffects)
3268 break;
3269 return true;
3270 }
3271
3272 case BlockExprClass:
3273 case CXXBindTemporaryExprClass:
3274 if (!IncludePossibleEffects)
3275 break;
3276 return true;
3277
3278 case MSPropertyRefExprClass:
3279 case MSPropertySubscriptExprClass:
3280 case CompoundAssignOperatorClass:
3281 case VAArgExprClass:
3282 case AtomicExprClass:
3283 case CXXThrowExprClass:
3284 case CXXNewExprClass:
3285 case CXXDeleteExprClass:
3286 case CoawaitExprClass:
3287 case DependentCoawaitExprClass:
3288 case CoyieldExprClass:
3289 // These always have a side-effect.
3290 return true;
3291
3292 case StmtExprClass: {
3293 // StmtExprs have a side-effect if any substatement does.
3294 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3295 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3296 return Finder.hasSideEffects();
3297 }
3298
3299 case ExprWithCleanupsClass:
3300 if (IncludePossibleEffects)
3301 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3302 return true;
3303 break;
3304
3305 case ParenExprClass:
3306 case ArraySubscriptExprClass:
3307 case OMPArraySectionExprClass:
3308 case MemberExprClass:
3309 case ConditionalOperatorClass:
3310 case BinaryConditionalOperatorClass:
3311 case CompoundLiteralExprClass:
3312 case ExtVectorElementExprClass:
3313 case DesignatedInitExprClass:
3314 case DesignatedInitUpdateExprClass:
3315 case ArrayInitLoopExprClass:
3316 case ParenListExprClass:
3317 case CXXPseudoDestructorExprClass:
3318 case CXXStdInitializerListExprClass:
3319 case SubstNonTypeTemplateParmExprClass:
3320 case MaterializeTemporaryExprClass:
3321 case ShuffleVectorExprClass:
3322 case ConvertVectorExprClass:
3323 case AsTypeExprClass:
3324 // These have a side-effect if any subexpression does.
3325 break;
3326
3327 case UnaryOperatorClass:
3328 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3329 return true;
3330 break;
3331
3332 case BinaryOperatorClass:
3333 if (cast<BinaryOperator>(this)->isAssignmentOp())
3334 return true;
3335 break;
3336
3337 case InitListExprClass:
3338 // FIXME: The children for an InitListExpr doesn't include the array filler.
3339 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3340 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3341 return true;
3342 break;
3343
3344 case GenericSelectionExprClass:
3345 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3346 HasSideEffects(Ctx, IncludePossibleEffects);
3347
3348 case ChooseExprClass:
3349 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3350 Ctx, IncludePossibleEffects);
3351
3352 case CXXDefaultArgExprClass:
3353 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3354 Ctx, IncludePossibleEffects);
3355
3356 case CXXDefaultInitExprClass: {
3357 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3358 if (const Expr *E = FD->getInClassInitializer())
3359 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3360 // If we've not yet parsed the initializer, assume it has side-effects.
3361 return true;
3362 }
3363
3364 case CXXDynamicCastExprClass: {
3365 // A dynamic_cast expression has side-effects if it can throw.
3366 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3367 if (DCE->getTypeAsWritten()->isReferenceType() &&
3368 DCE->getCastKind() == CK_Dynamic)
3369 return true;
3370 }
3371 LLVM_FALLTHROUGH[[clang::fallthrough]];
3372 case ImplicitCastExprClass:
3373 case CStyleCastExprClass:
3374 case CXXStaticCastExprClass:
3375 case CXXReinterpretCastExprClass:
3376 case CXXConstCastExprClass:
3377 case CXXFunctionalCastExprClass: {
3378 // While volatile reads are side-effecting in both C and C++, we treat them
3379 // as having possible (not definite) side-effects. This allows idiomatic
3380 // code to behave without warning, such as sizeof(*v) for a volatile-
3381 // qualified pointer.
3382 if (!IncludePossibleEffects)
3383 break;
3384
3385 const CastExpr *CE = cast<CastExpr>(this);
3386 if (CE->getCastKind() == CK_LValueToRValue &&
3387 CE->getSubExpr()->getType().isVolatileQualified())
3388 return true;
3389 break;
3390 }
3391
3392 case CXXTypeidExprClass:
3393 // typeid might throw if its subexpression is potentially-evaluated, so has
3394 // side-effects in that case whether or not its subexpression does.
3395 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3396
3397 case CXXConstructExprClass:
3398 case CXXTemporaryObjectExprClass: {
3399 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3400 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3401 return true;
3402 // A trivial constructor does not add any side-effects of its own. Just look
3403 // at its arguments.
3404 break;
3405 }
3406
3407 case CXXInheritedCtorInitExprClass: {
3408 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3409 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3410 return true;
3411 break;
3412 }
3413
3414 case LambdaExprClass: {
3415 const LambdaExpr *LE = cast<LambdaExpr>(this);
3416 for (Expr *E : LE->capture_inits())
3417 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3418 return true;
3419 return false;
3420 }
3421
3422 case PseudoObjectExprClass: {
3423 // Only look for side-effects in the semantic form, and look past
3424 // OpaqueValueExpr bindings in that form.
3425 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3426 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3427 E = PO->semantics_end();
3428 I != E; ++I) {
3429 const Expr *Subexpr = *I;
3430 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3431 Subexpr = OVE->getSourceExpr();
3432 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3433 return true;
3434 }
3435 return false;
3436 }
3437
3438 case ObjCBoxedExprClass:
3439 case ObjCArrayLiteralClass:
3440 case ObjCDictionaryLiteralClass:
3441 case ObjCSelectorExprClass:
3442 case ObjCProtocolExprClass:
3443 case ObjCIsaExprClass:
3444 case ObjCIndirectCopyRestoreExprClass:
3445 case ObjCSubscriptRefExprClass:
3446 case ObjCBridgedCastExprClass:
3447 case ObjCMessageExprClass:
3448 case ObjCPropertyRefExprClass:
3449 // FIXME: Classify these cases better.
3450 if (IncludePossibleEffects)
3451 return true;
3452 break;
3453 }
3454
3455 // Recurse to children.
3456 for (const Stmt *SubStmt : children())
3457 if (SubStmt &&
3458 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3459 return true;
3460
3461 return false;
3462}
3463
3464namespace {
3465 /// Look for a call to a non-trivial function within an expression.
3466 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3467 {
3468 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3469
3470 bool NonTrivial;
3471
3472 public:
3473 explicit NonTrivialCallFinder(const ASTContext &Context)
3474 : Inherited(Context), NonTrivial(false) { }
3475
3476 bool hasNonTrivialCall() const { return NonTrivial; }
3477
3478 void VisitCallExpr(const CallExpr *E) {
3479 if (const CXXMethodDecl *Method
3480 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3481 if (Method->isTrivial()) {
3482 // Recurse to children of the call.
3483 Inherited::VisitStmt(E);
3484 return;
3485 }
3486 }
3487
3488 NonTrivial = true;
3489 }
3490
3491 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3492 if (E->getConstructor()->isTrivial()) {
3493 // Recurse to children of the call.
3494 Inherited::VisitStmt(E);
3495 return;
3496 }
3497
3498 NonTrivial = true;
3499 }
3500
3501 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3502 if (E->getTemporary()->getDestructor()->isTrivial()) {
3503 Inherited::VisitStmt(E);
3504 return;
3505 }
3506
3507 NonTrivial = true;
3508 }
3509 };
3510}
3511
3512bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3513 NonTrivialCallFinder Finder(Ctx);
3514 Finder.Visit(this);
3515 return Finder.hasNonTrivialCall();
3516}
3517
3518/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3519/// pointer constant or not, as well as the specific kind of constant detected.
3520/// Null pointer constants can be integer constant expressions with the
3521/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3522/// (a GNU extension).
3523Expr::NullPointerConstantKind
3524Expr::isNullPointerConstant(ASTContext &Ctx,
3525 NullPointerConstantValueDependence NPC) const {
3526 if (isValueDependent() &&
3527 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3528 switch (NPC) {
3529 case NPC_NeverValueDependent:
3530 llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3530)
;
3531 case NPC_ValueDependentIsNull:
3532 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3533 return NPCK_ZeroExpression;
3534 else
3535 return NPCK_NotNull;
3536
3537 case NPC_ValueDependentIsNotNull:
3538 return NPCK_NotNull;
3539 }
3540 }
3541
3542 // Strip off a cast to void*, if it exists. Except in C++.
3543 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3544 if (!Ctx.getLangOpts().CPlusPlus) {
3545 // Check that it is a cast to void*.
3546 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3547 QualType Pointee = PT->getPointeeType();
3548 Qualifiers Qs = Pointee.getQualifiers();
3549 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3550 // has non-default address space it is not treated as nullptr.
3551 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3552 // since it cannot be assigned to a pointer to constant address space.
3553 if ((Ctx.getLangOpts().OpenCLVersion >= 200 &&
3554 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3555 (Ctx.getLangOpts().OpenCL &&
3556 Ctx.getLangOpts().OpenCLVersion < 200 &&
3557 Pointee.getAddressSpace() == LangAS::opencl_private))
3558 Qs.removeAddressSpace();
3559
3560 if (Pointee->isVoidType() && Qs.empty() && // to void*
3561 CE->getSubExpr()->getType()->isIntegerType()) // from int
3562 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3563 }
3564 }
3565 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3566 // Ignore the ImplicitCastExpr type entirely.
3567 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3568 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3569 // Accept ((void*)0) as a null pointer constant, as many other
3570 // implementations do.
3571 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3572 } else if (const GenericSelectionExpr *GE =
3573 dyn_cast<GenericSelectionExpr>(this)) {
3574 if (GE->isResultDependent())
3575 return NPCK_NotNull;
3576 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3577 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3578 if (CE->isConditionDependent())
3579 return NPCK_NotNull;
3580 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3581 } else if (const CXXDefaultArgExpr *DefaultArg
3582 = dyn_cast<CXXDefaultArgExpr>(this)) {
3583 // See through default argument expressions.
3584 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3585 } else if (const CXXDefaultInitExpr *DefaultInit
3586 = dyn_cast<CXXDefaultInitExpr>(this)) {
3587 // See through default initializer expressions.
3588 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3589 } else if (isa<GNUNullExpr>(this)) {
3590 // The GNU __null extension is always a null pointer constant.
3591 return NPCK_GNUNull;
3592 } else if (const MaterializeTemporaryExpr *M
3593 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3594 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3595 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3596 if (const Expr *Source = OVE->getSourceExpr())
3597 return Source->isNullPointerConstant(Ctx, NPC);
3598 }
3599
3600 // C++11 nullptr_t is always a null pointer constant.
3601 if (getType()->isNullPtrType())
3602 return NPCK_CXX11_nullptr;
3603
3604 if (const RecordType *UT = getType()->getAsUnionType())
3605 if (!Ctx.getLangOpts().CPlusPlus11 &&
3606 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3607 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3608 const Expr *InitExpr = CLE->getInitializer();
3609 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3610 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3611 }
3612 // This expression must be an integer type.
3613 if (!getType()->isIntegerType() ||
3614 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3615 return NPCK_NotNull;
3616
3617 if (Ctx.getLangOpts().CPlusPlus11) {
3618 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3619 // value zero or a prvalue of type std::nullptr_t.
3620 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3621 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3622 if (Lit && !Lit->getValue())
3623 return NPCK_ZeroLiteral;
3624 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3625 return NPCK_NotNull;
3626 } else {
3627 // If we have an integer constant expression, we need to *evaluate* it and
3628 // test for the value 0.
3629 if (!isIntegerConstantExpr(Ctx))
3630 return NPCK_NotNull;
3631 }
3632
3633 if (EvaluateKnownConstInt(Ctx) != 0)
3634 return NPCK_NotNull;
3635
3636 if (isa<IntegerLiteral>(this))
3637 return NPCK_ZeroLiteral;
3638 return NPCK_ZeroExpression;
3639}
3640
3641/// If this expression is an l-value for an Objective C
3642/// property, find the underlying property reference expression.
3643const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3644 const Expr *E = this;
3645 while (true) {
3646 assert((E->getValueKind() == VK_LValue &&(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3648, __PRETTY_FUNCTION__))
3647 E->getObjectKind() == OK_ObjCProperty) &&(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3648, __PRETTY_FUNCTION__))
3648 "expression is not a property reference")(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3648, __PRETTY_FUNCTION__))
;
3649 E = E->IgnoreParenCasts();
3650 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3651 if (BO->getOpcode() == BO_Comma) {
3652 E = BO->getRHS();
3653 continue;
3654 }
3655 }
3656
3657 break;
3658 }
3659
3660 return cast<ObjCPropertyRefExpr>(E);
3661}
3662
3663bool Expr::isObjCSelfExpr() const {
3664 const Expr *E = IgnoreParenImpCasts();
3665
3666 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3667 if (!DRE)
3668 return false;
3669
3670 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3671 if (!Param)
3672 return false;
3673
3674 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3675 if (!M)
3676 return false;
3677
3678 return M->getSelfDecl() == Param;
3679}
3680
3681FieldDecl *Expr::getSourceBitField() {
3682 Expr *E = this->IgnoreParens();
3683
3684 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3685 if (ICE->getCastKind() == CK_LValueToRValue ||
3686 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3687 E = ICE->getSubExpr()->IgnoreParens();
3688 else
3689 break;
3690 }
3691
3692 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3693 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3694 if (Field->isBitField())
3695 return Field;
3696
3697 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3698 FieldDecl *Ivar = IvarRef->getDecl();
3699 if (Ivar->isBitField())
3700 return Ivar;
3701 }
3702
3703 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3704 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3705 if (Field->isBitField())
3706 return Field;
3707
3708 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3709 if (Expr *E = BD->getBinding())
3710 return E->getSourceBitField();
3711 }
3712
3713 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3714 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3715 return BinOp->getLHS()->getSourceBitField();
3716
3717 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3718 return BinOp->getRHS()->getSourceBitField();
3719 }
3720
3721 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3722 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3723 return UnOp->getSubExpr()->getSourceBitField();
3724
3725 return nullptr;
3726}
3727
3728bool Expr::refersToVectorElement() const {
3729 // FIXME: Why do we not just look at the ObjectKind here?
3730 const Expr *E = this->IgnoreParens();
3731
3732 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3733 if (ICE->getValueKind() != VK_RValue &&
3734 ICE->getCastKind() == CK_NoOp)
3735 E = ICE->getSubExpr()->IgnoreParens();
3736 else
3737 break;
3738 }
3739
3740 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3741 return ASE->getBase()->getType()->isVectorType();
3742
3743 if (isa<ExtVectorElementExpr>(E))
3744 return true;
3745
3746 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3747 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3748 if (auto *E = BD->getBinding())
3749 return E->refersToVectorElement();
3750
3751 return false;
3752}
3753
3754bool Expr::refersToGlobalRegisterVar() const {
3755 const Expr *E = this->IgnoreParenImpCasts();
3756
3757 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3758 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3759 if (VD->getStorageClass() == SC_Register &&
3760 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3761 return true;
3762
3763 return false;
3764}
3765
3766/// isArrow - Return true if the base expression is a pointer to vector,
3767/// return false if the base expression is a vector.
3768bool ExtVectorElementExpr::isArrow() const {
3769 return getBase()->getType()->isPointerType();
3770}
3771
3772unsigned ExtVectorElementExpr::getNumElements() const {
3773 if (const VectorType *VT = getType()->getAs<VectorType>())
3774 return VT->getNumElements();
3775 return 1;
3776}
3777
3778/// containsDuplicateElements - Return true if any element access is repeated.
3779bool ExtVectorElementExpr::containsDuplicateElements() const {
3780 // FIXME: Refactor this code to an accessor on the AST node which returns the
3781 // "type" of component access, and share with code below and in Sema.
3782 StringRef Comp = Accessor->getName();
3783
3784 // Halving swizzles do not contain duplicate elements.
3785 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3786 return false;
3787
3788 // Advance past s-char prefix on hex swizzles.
3789 if (Comp[0] == 's' || Comp[0] == 'S')
3790 Comp = Comp.substr(1);
3791
3792 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3793 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3794 return true;
3795
3796 return false;
3797}
3798
3799/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3800void ExtVectorElementExpr::getEncodedElementAccess(
3801 SmallVectorImpl<uint32_t> &Elts) const {
3802 StringRef Comp = Accessor->getName();
3803 bool isNumericAccessor = false;
3804 if (Comp[0] == 's' || Comp[0] == 'S') {
3805 Comp = Comp.substr(1);
3806 isNumericAccessor = true;
3807 }
3808
3809 bool isHi = Comp == "hi";
3810 bool isLo = Comp == "lo";
3811 bool isEven = Comp == "even";
3812 bool isOdd = Comp == "odd";
3813
3814 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3815 uint64_t Index;
3816
3817 if (isHi)
3818 Index = e + i;
3819 else if (isLo)
3820 Index = i;
3821 else if (isEven)
3822 Index = 2 * i;
3823 else if (isOdd)
3824 Index = 2 * i + 1;
3825 else
3826 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3827
3828 Elts.push_back(Index);
3829 }
3830}
3831
3832ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3833 QualType Type, SourceLocation BLoc,
3834 SourceLocation RP)
3835 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3836 Type->isDependentType(), Type->isDependentType(),
3837 Type->isInstantiationDependentType(),
3838 Type->containsUnexpandedParameterPack()),
3839 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3840{
3841 SubExprs = new (C) Stmt*[args.size()];
3842 for (unsigned i = 0; i != args.size(); i++) {
3843 if (args[i]->isTypeDependent())
3844 ExprBits.TypeDependent = true;
3845 if (args[i]->isValueDependent())
3846 ExprBits.ValueDependent = true;
3847 if (args[i]->isInstantiationDependent())
3848 ExprBits.InstantiationDependent = true;
3849 if (args[i]->containsUnexpandedParameterPack())
3850 ExprBits.ContainsUnexpandedParameterPack = true;
3851
3852 SubExprs[i] = args[i];
3853 }
3854}
3855
3856void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3857 if (SubExprs) C.Deallocate(SubExprs);
3858
3859 this->NumExprs = Exprs.size();
3860 SubExprs = new (C) Stmt*[NumExprs];
3861 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3862}
3863
3864GenericSelectionExpr::GenericSelectionExpr(
3865 const ASTContext &, SourceLocation GenericLoc, Expr *ControllingExpr,
3866 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
3867 SourceLocation DefaultLoc, SourceLocation RParenLoc,
3868 bool ContainsUnexpandedParameterPack, unsigned ResultIndex)
3869 : Expr(GenericSelectionExprClass, AssocExprs[ResultIndex]->getType(),
3870 AssocExprs[ResultIndex]->getValueKind(),
3871 AssocExprs[ResultIndex]->getObjectKind(),
3872 AssocExprs[ResultIndex]->isTypeDependent(),
3873 AssocExprs[ResultIndex]->isValueDependent(),
3874 AssocExprs[ResultIndex]->isInstantiationDependent(),
3875 ContainsUnexpandedParameterPack),
3876 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3877 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3878 assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3880, __PRETTY_FUNCTION__))
3879 "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3880, __PRETTY_FUNCTION__))
3880 " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3880, __PRETTY_FUNCTION__))
;
3881 assert(ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!")((ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!"
) ? static_cast<void> (0) : __assert_fail ("ResultIndex < NumAssocs && \"ResultIndex is out-of-bounds!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3881, __PRETTY_FUNCTION__))
;
3882
3883 GenericSelectionExprBits.GenericLoc = GenericLoc;
3884 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
3885 std::copy(AssocExprs.begin(), AssocExprs.end(),
3886 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
3887 std::copy(AssocTypes.begin(), AssocTypes.end(),
3888 getTrailingObjects<TypeSourceInfo *>());
3889}
3890
3891GenericSelectionExpr::GenericSelectionExpr(
3892 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
3893 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
3894 SourceLocation DefaultLoc, SourceLocation RParenLoc,
3895 bool ContainsUnexpandedParameterPack)
3896 : Expr(GenericSelectionExprClass, Context.DependentTy, VK_RValue,
3897 OK_Ordinary,
3898 /*isTypeDependent=*/true,
3899 /*isValueDependent=*/true,
3900 /*isInstantiationDependent=*/true, ContainsUnexpandedParameterPack),
3901 NumAssocs(AssocExprs.size()), ResultIndex(ResultDependentIndex),
3902 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3903 assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3905, __PRETTY_FUNCTION__))
3904 "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3905, __PRETTY_FUNCTION__))
3905 " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3905, __PRETTY_FUNCTION__))
;
3906
3907 GenericSelectionExprBits.GenericLoc = GenericLoc;
3908 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
3909 std::copy(AssocExprs.begin(), AssocExprs.end(),
3910 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
3911 std::copy(AssocTypes.begin(), AssocTypes.end(),
3912 getTrailingObjects<TypeSourceInfo *>());
3913}
3914
3915GenericSelectionExpr::GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs)
3916 : Expr(GenericSelectionExprClass, Empty), NumAssocs(NumAssocs) {}
3917
3918GenericSelectionExpr *GenericSelectionExpr::Create(
3919 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
3920 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
3921 SourceLocation DefaultLoc, SourceLocation RParenLoc,
3922 bool ContainsUnexpandedParameterPack, unsigned ResultIndex) {
3923 unsigned NumAssocs = AssocExprs.size();
3924 void *Mem = Context.Allocate(
3925 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
3926 alignof(GenericSelectionExpr));
3927 return new (Mem) GenericSelectionExpr(
3928 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
3929 RParenLoc, ContainsUnexpandedParameterPack, ResultIndex);
3930}
3931
3932GenericSelectionExpr *GenericSelectionExpr::Create(
3933 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
3934 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
3935 SourceLocation DefaultLoc, SourceLocation RParenLoc,
3936 bool ContainsUnexpandedParameterPack) {
3937 unsigned NumAssocs = AssocExprs.size();
3938 void *Mem = Context.Allocate(
3939 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
3940 alignof(GenericSelectionExpr));
3941 return new (Mem) GenericSelectionExpr(
3942 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
3943 RParenLoc, ContainsUnexpandedParameterPack);
3944}
3945
3946GenericSelectionExpr *
3947GenericSelectionExpr::CreateEmpty(const ASTContext &Context,
3948 unsigned NumAssocs) {
3949 void *Mem = Context.Allocate(
3950 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
3951 alignof(GenericSelectionExpr));
3952 return new (Mem) GenericSelectionExpr(EmptyShell(), NumAssocs);
3953}
3954
3955//===----------------------------------------------------------------------===//
3956// DesignatedInitExpr
3957//===----------------------------------------------------------------------===//
3958
3959IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3960 assert(Kind == FieldDesignator && "Only valid on a field designator")((Kind == FieldDesignator && "Only valid on a field designator"
) ? static_cast<void> (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 3960, __PRETTY_FUNCTION__))
;
3961 if (Field.NameOrField & 0x01)
3962 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3963 else
3964 return getField()->getIdentifier();
3965}
3966
3967DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3968 llvm::ArrayRef<Designator> Designators,
3969 SourceLocation EqualOrColonLoc,
3970 bool GNUSyntax,
3971 ArrayRef<Expr*> IndexExprs,
3972 Expr *Init)
3973 : Expr(DesignatedInitExprClass, Ty,
3974 Init->getValueKind(), Init->getObjectKind(),
3975 Init->isTypeDependent(), Init->isValueDependent(),
3976 Init->isInstantiationDependent(),
3977 Init->containsUnexpandedParameterPack()),
3978 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3979 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3980 this->Designators = new (C) Designator[NumDesignators];
3981
3982 // Record the initializer itself.
3983 child_iterator Child = child_begin();
3984 *Child++ = Init;
3985
3986 // Copy the designators and their subexpressions, computing
3987 // value-dependence along the way.
3988 unsigned IndexIdx = 0;
3989 for (unsigned I = 0; I != NumDesignators; ++I) {
3990 this->Designators[I] = Designators[I];
3991
3992 if (this->Designators[I].isArrayDesignator()) {
3993 // Compute type- and value-dependence.
3994 Expr *Index = IndexExprs[IndexIdx];
3995 if (Index->isTypeDependent() || Index->isValueDependent())
3996 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3997 if (Index->isInstantiationDependent())
3998 ExprBits.InstantiationDependent = true;
3999 // Propagate unexpanded parameter packs.
4000 if (Index->containsUnexpandedParameterPack())
4001 ExprBits.ContainsUnexpandedParameterPack = true;
4002
4003 // Copy the index expressions into permanent storage.
4004 *Child++ = IndexExprs[IndexIdx++];
4005 } else if (this->Designators[I].isArrayRangeDesignator()) {
4006 // Compute type- and value-dependence.
4007 Expr *Start = IndexExprs[IndexIdx];
4008 Expr *End = IndexExprs[IndexIdx + 1];
4009 if (Start->isTypeDependent() || Start->isValueDependent() ||
4010 End->isTypeDependent() || End->isValueDependent()) {
4011 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
4012 ExprBits.InstantiationDependent = true;
4013 } else if (Start->isInstantiationDependent() ||
4014 End->isInstantiationDependent()) {
4015 ExprBits.InstantiationDependent = true;
4016 }
4017
4018 // Propagate unexpanded parameter packs.
4019 if (Start->containsUnexpandedParameterPack() ||
4020 End->containsUnexpandedParameterPack())
4021 ExprBits.ContainsUnexpandedParameterPack = true;
4022
4023 // Copy the start/end expressions into permanent storage.
4024 *Child++ = IndexExprs[IndexIdx++];
4025 *Child++ = IndexExprs[IndexIdx++];
4026 }
4027 }
4028
4029 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions")((IndexIdx == IndexExprs.size() && "Wrong number of index expressions"
) ? static_cast<void> (0) : __assert_fail ("IndexIdx == IndexExprs.size() && \"Wrong number of index expressions\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4029, __PRETTY_FUNCTION__))
;
4030}
4031
4032DesignatedInitExpr *
4033DesignatedInitExpr::Create(const ASTContext &C,
4034 llvm::ArrayRef<Designator> Designators,
4035 ArrayRef<Expr*> IndexExprs,
4036 SourceLocation ColonOrEqualLoc,
4037 bool UsesColonSyntax, Expr *Init) {
4038 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
4039 alignof(DesignatedInitExpr));
4040 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
4041 ColonOrEqualLoc, UsesColonSyntax,
4042 IndexExprs, Init);
4043}
4044
4045DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
4046 unsigned NumIndexExprs) {
4047 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
4048 alignof(DesignatedInitExpr));
4049 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
4050}
4051
4052void DesignatedInitExpr::setDesignators(const ASTContext &C,
4053 const Designator *Desigs,
4054 unsigned NumDesigs) {
4055 Designators = new (C) Designator[NumDesigs];
1
Null pointer value stored to field 'Designators'
4056 NumDesignators = NumDesigs;
4057 for (unsigned I = 0; I != NumDesigs; ++I)
2
Assuming 'I' is not equal to 'NumDesigs'
3
Loop condition is true. Entering loop body
4058 Designators[I] = Desigs[I];
4
Called C++ object pointer is null
4059}
4060
4061SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
4062 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
4063 if (size() == 1)
4064 return DIE->getDesignator(0)->getSourceRange();
4065 return SourceRange(DIE->getDesignator(0)->getBeginLoc(),
4066 DIE->getDesignator(size() - 1)->getEndLoc());
4067}
4068
4069SourceLocation DesignatedInitExpr::getBeginLoc() const {
4070 SourceLocation StartLoc;
4071 auto *DIE = const_cast<DesignatedInitExpr *>(this);
4072 Designator &First = *DIE->getDesignator(0);
4073 if (First.isFieldDesignator()) {
4074 if (GNUSyntax)
4075 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
4076 else
4077 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
4078 } else
4079 StartLoc =
4080 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
4081 return StartLoc;
4082}
4083
4084SourceLocation DesignatedInitExpr::getEndLoc() const {
4085 return getInit()->getEndLoc();
4086}
4087
4088Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
4089 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator")((D.Kind == Designator::ArrayDesignator && "Requires array designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayDesignator && \"Requires array designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4089, __PRETTY_FUNCTION__))
;
4090 return getSubExpr(D.ArrayOrRange.Index + 1);
4091}
4092
4093Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
4094 assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4095, __PRETTY_FUNCTION__))
4095 "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4095, __PRETTY_FUNCTION__))
;
4096 return getSubExpr(D.ArrayOrRange.Index + 1);
4097}
4098
4099Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
4100 assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4101, __PRETTY_FUNCTION__))
4101 "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4101, __PRETTY_FUNCTION__))
;
4102 return getSubExpr(D.ArrayOrRange.Index + 2);
4103}
4104
4105/// Replaces the designator at index @p Idx with the series
4106/// of designators in [First, Last).
4107void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
4108 const Designator *First,
4109 const Designator *Last) {
4110 unsigned NumNewDesignators = Last - First;
4111 if (NumNewDesignators == 0) {
4112 std::copy_backward(Designators + Idx + 1,
4113 Designators + NumDesignators,
4114 Designators + Idx);
4115 --NumNewDesignators;
4116 return;
4117 } else if (NumNewDesignators == 1) {
4118 Designators[Idx] = *First;
4119 return;
4120 }
4121
4122 Designator *NewDesignators
4123 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
4124 std::copy(Designators, Designators + Idx, NewDesignators);
4125 std::copy(First, Last, NewDesignators + Idx);
4126 std::copy(Designators + Idx + 1, Designators + NumDesignators,
4127 NewDesignators + Idx + NumNewDesignators);
4128 Designators = NewDesignators;
4129 NumDesignators = NumDesignators - 1 + NumNewDesignators;
4130}
4131
4132DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
4133 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
4134 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
4135 OK_Ordinary, false, false, false, false) {
4136 BaseAndUpdaterExprs[0] = baseExpr;
4137
4138 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
4139 ILE->setType(baseExpr->getType());
4140 BaseAndUpdaterExprs[1] = ILE;
4141}
4142
4143SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
4144 return getBase()->getBeginLoc();
4145}
4146
4147SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
4148 return getBase()->getEndLoc();
4149}
4150
4151ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs,
4152 SourceLocation RParenLoc)
4153 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
4154 false, false),
4155 LParenLoc(LParenLoc), RParenLoc(RParenLoc) {
4156 ParenListExprBits.NumExprs = Exprs.size();
4157
4158 for (unsigned I = 0, N = Exprs.size(); I != N; ++I) {
4159 if (Exprs[I]->isTypeDependent())
4160 ExprBits.TypeDependent = true;
4161 if (Exprs[I]->isValueDependent())
4162 ExprBits.ValueDependent = true;
4163 if (Exprs[I]->isInstantiationDependent())
4164 ExprBits.InstantiationDependent = true;
4165 if (Exprs[I]->containsUnexpandedParameterPack())
4166 ExprBits.ContainsUnexpandedParameterPack = true;
4167
4168 getTrailingObjects<Stmt *>()[I] = Exprs[I];
4169 }
4170}
4171
4172ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs)
4173 : Expr(ParenListExprClass, Empty) {
4174 ParenListExprBits.NumExprs = NumExprs;
4175}
4176
4177ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx,
4178 SourceLocation LParenLoc,
4179 ArrayRef<Expr *> Exprs,
4180 SourceLocation RParenLoc) {
4181 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()),
4182 alignof(ParenListExpr));
4183 return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc);
4184}
4185
4186ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx,
4187 unsigned NumExprs) {
4188 void *Mem =
4189 Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr));
4190 return new (Mem) ParenListExpr(EmptyShell(), NumExprs);
4191}
4192
4193const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
4194 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
4195 e = ewc->getSubExpr();
4196 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
4197 e = m->GetTemporaryExpr();
4198 e = cast<CXXConstructExpr>(e)->getArg(0);
4199 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
4200 e = ice->getSubExpr();
4201 return cast<OpaqueValueExpr>(e);
4202}
4203
4204PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
4205 EmptyShell sh,
4206 unsigned numSemanticExprs) {
4207 void *buffer =
4208 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
4209 alignof(PseudoObjectExpr));
4210 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4211}
4212
4213PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
4214 : Expr(PseudoObjectExprClass, shell) {
4215 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4216}
4217
4218PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4219 ArrayRef<Expr*> semantics,
4220 unsigned resultIndex) {
4221 assert(syntax && "no syntactic expression!")((syntax && "no syntactic expression!") ? static_cast
<void> (0) : __assert_fail ("syntax && \"no syntactic expression!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4221, __PRETTY_FUNCTION__))
;
4222 assert(semantics.size() && "no semantic expressions!")((semantics.size() && "no semantic expressions!") ? static_cast
<void> (0) : __assert_fail ("semantics.size() && \"no semantic expressions!\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4222, __PRETTY_FUNCTION__))
;
4223
4224 QualType type;
4225 ExprValueKind VK;
4226 if (resultIndex == NoResult) {
4227 type = C.VoidTy;
4228 VK = VK_RValue;
4229 } else {
4230 assert(resultIndex < semantics.size())((resultIndex < semantics.size()) ? static_cast<void>
(0) : __assert_fail ("resultIndex < semantics.size()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4230, __PRETTY_FUNCTION__))
;
4231 type = semantics[resultIndex]->getType();
4232 VK = semantics[resultIndex]->getValueKind();
4233 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary)((semantics[resultIndex]->getObjectKind() == OK_Ordinary) ?
static_cast<void> (0) : __assert_fail ("semantics[resultIndex]->getObjectKind() == OK_Ordinary"
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4233, __PRETTY_FUNCTION__))
;
4234 }
4235
4236 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
4237 alignof(PseudoObjectExpr));
4238 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4239 resultIndex);
4240}
4241
4242PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4243 Expr *syntax, ArrayRef<Expr*> semantics,
4244 unsigned resultIndex)
4245 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4246 /*filled in at end of ctor*/ false, false, false, false) {
4247 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4248 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4249
4250 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4251 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4252 getSubExprsBuffer()[i] = E;
4253
4254 if (E->isTypeDependent())
4255 ExprBits.TypeDependent = true;
4256 if (E->isValueDependent())
4257 ExprBits.ValueDependent = true;
4258 if (E->isInstantiationDependent())
4259 ExprBits.InstantiationDependent = true;
4260 if (E->containsUnexpandedParameterPack())
4261 ExprBits.ContainsUnexpandedParameterPack = true;
4262
4263 if (isa<OpaqueValueExpr>(E))
4264 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4266, __PRETTY_FUNCTION__))
4265 "opaque-value semantic expressions for pseudo-object "((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4266, __PRETTY_FUNCTION__))
4266 "operations must have sources")((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4266, __PRETTY_FUNCTION__))
;
4267 }
4268}
4269
4270//===----------------------------------------------------------------------===//
4271// Child Iterators for iterating over subexpressions/substatements
4272//===----------------------------------------------------------------------===//
4273
4274// UnaryExprOrTypeTraitExpr
4275Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4276 const_child_range CCR =
4277 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4278 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4279}
4280
4281Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
4282 // If this is of a type and the type is a VLA type (and not a typedef), the
4283 // size expression of the VLA needs to be treated as an executable expression.
4284 // Why isn't this weirdness documented better in StmtIterator?
4285 if (isArgumentType()) {
4286 if (const VariableArrayType *T =
4287 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4288 return const_child_range(const_child_iterator(T), const_child_iterator());
4289 return const_child_range(const_child_iterator(), const_child_iterator());
4290 }
4291 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4292}
4293
4294AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4295 QualType t, AtomicOp op, SourceLocation RP)
4296 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4297 false, false, false, false),
4298 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4299{
4300 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions")((args.size() == getNumSubExprs(op) && "wrong number of subexpressions"
) ? static_cast<void> (0) : __assert_fail ("args.size() == getNumSubExprs(op) && \"wrong number of subexpressions\""
, "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4300, __PRETTY_FUNCTION__))
;
4301 for (unsigned i = 0; i != args.size(); i++) {
4302 if (args[i]->isTypeDependent())
4303 ExprBits.TypeDependent = true;
4304 if (args[i]->isValueDependent())
4305 ExprBits.ValueDependent = true;
4306 if (args[i]->isInstantiationDependent())
4307 ExprBits.InstantiationDependent = true;
4308 if (args[i]->containsUnexpandedParameterPack())
4309 ExprBits.ContainsUnexpandedParameterPack = true;
4310
4311 SubExprs[i] = args[i];
4312 }
4313}
4314
4315unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4316 switch (Op) {
4317 case AO__c11_atomic_init:
4318 case AO__opencl_atomic_init:
4319 case AO__c11_atomic_load:
4320 case AO__atomic_load_n:
4321 return 2;
4322
4323 case AO__opencl_atomic_load:
4324 case AO__c11_atomic_store:
4325 case AO__c11_atomic_exchange:
4326 case AO__atomic_load:
4327 case AO__atomic_store:
4328 case AO__atomic_store_n:
4329 case AO__atomic_exchange_n:
4330 case AO__c11_atomic_fetch_add:
4331 case AO__c11_atomic_fetch_sub:
4332 case AO__c11_atomic_fetch_and:
4333 case AO__c11_atomic_fetch_or:
4334 case AO__c11_atomic_fetch_xor:
4335 case AO__atomic_fetch_add:
4336 case AO__atomic_fetch_sub:
4337 case AO__atomic_fetch_and:
4338 case AO__atomic_fetch_or:
4339 case AO__atomic_fetch_xor:
4340 case AO__atomic_fetch_nand:
4341 case AO__atomic_add_fetch:
4342 case AO__atomic_sub_fetch:
4343 case AO__atomic_and_fetch:
4344 case AO__atomic_or_fetch:
4345 case AO__atomic_xor_fetch:
4346 case AO__atomic_nand_fetch:
4347 case AO__atomic_fetch_min:
4348 case AO__atomic_fetch_max:
4349 return 3;
4350
4351 case AO__opencl_atomic_store:
4352 case AO__opencl_atomic_exchange:
4353 case AO__opencl_atomic_fetch_add:
4354 case AO__opencl_atomic_fetch_sub:
4355 case AO__opencl_atomic_fetch_and:
4356 case AO__opencl_atomic_fetch_or:
4357 case AO__opencl_atomic_fetch_xor:
4358 case AO__opencl_atomic_fetch_min:
4359 case AO__opencl_atomic_fetch_max:
4360 case AO__atomic_exchange:
4361 return 4;
4362
4363 case AO__c11_atomic_compare_exchange_strong:
4364 case AO__c11_atomic_compare_exchange_weak:
4365 return 5;
4366
4367 case AO__opencl_atomic_compare_exchange_strong:
4368 case AO__opencl_atomic_compare_exchange_weak:
4369 case AO__atomic_compare_exchange:
4370 case AO__atomic_compare_exchange_n:
4371 return 6;
4372 }
4373 llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4373)
;
4374}
4375
4376QualType AtomicExpr::getValueType() const {
4377 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4378 if (auto AT = T->getAs<AtomicType>())
4379 return AT->getValueType();
4380 return T;
4381}
4382
4383QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
4384 unsigned ArraySectionCount = 0;
4385 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4386 Base = OASE->getBase();
4387 ++ArraySectionCount;
4388 }
4389 while (auto *ASE =
4390 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
4391 Base = ASE->getBase();
4392 ++ArraySectionCount;
4393 }
4394 Base = Base->IgnoreParenImpCasts();
4395 auto OriginalTy = Base->getType();
4396 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4397 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4398 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4399
4400 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4401 if (OriginalTy->isAnyPointerType())
4402 OriginalTy = OriginalTy->getPointeeType();
4403 else {
4404 assert (OriginalTy->isArrayType())((OriginalTy->isArrayType()) ? static_cast<void> (0)
: __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-9~svn361465/tools/clang/lib/AST/Expr.cpp"
, 4404, __PRETTY_FUNCTION__))
;
4405 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
4406 }
4407 }
4408 return OriginalTy;
4409}