Bug Summary

File:clang/lib/AST/Expr.cpp
Warning:line 745, column 7
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -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 -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/llvm/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/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/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++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-11-29-190409-37574-1 -x c++ /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp

/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp

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/ComputeDependence.h"
18#include "clang/AST/DeclCXX.h"
19#include "clang/AST/DeclObjC.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/DependenceFlags.h"
22#include "clang/AST/EvaluatedExprVisitor.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/IgnoreExpr.h"
25#include "clang/AST/Mangle.h"
26#include "clang/AST/RecordLayout.h"
27#include "clang/AST/StmtVisitor.h"
28#include "clang/Basic/Builtins.h"
29#include "clang/Basic/CharInfo.h"
30#include "clang/Basic/SourceManager.h"
31#include "clang/Basic/TargetInfo.h"
32#include "clang/Lex/Lexer.h"
33#include "clang/Lex/LiteralSupport.h"
34#include "llvm/Support/ErrorHandling.h"
35#include "llvm/Support/raw_ostream.h"
36#include <algorithm>
37#include <cstring>
38using namespace clang;
39
40const Expr *Expr::getBestDynamicClassTypeExpr() const {
41 const Expr *E = this;
42 while (true) {
43 E = E->IgnoreParenBaseCasts();
44
45 // Follow the RHS of a comma operator.
46 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
47 if (BO->getOpcode() == BO_Comma) {
48 E = BO->getRHS();
49 continue;
50 }
51 }
52
53 // Step into initializer for materialized temporaries.
54 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
55 E = MTE->getSubExpr();
56 continue;
57 }
58
59 break;
60 }
61
62 return E;
63}
64
65const CXXRecordDecl *Expr::getBestDynamicClassType() const {
66 const Expr *E = getBestDynamicClassTypeExpr();
67 QualType DerivedType = E->getType();
68 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
69 DerivedType = PTy->getPointeeType();
70
71 if (DerivedType->isDependentType())
72 return nullptr;
73
74 const RecordType *Ty = DerivedType->castAs<RecordType>();
75 Decl *D = Ty->getDecl();
76 return cast<CXXRecordDecl>(D);
77}
78
79const Expr *Expr::skipRValueSubobjectAdjustments(
80 SmallVectorImpl<const Expr *> &CommaLHSs,
81 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
82 const Expr *E = this;
83 while (true) {
84 E = E->IgnoreParens();
85
86 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
87 if ((CE->getCastKind() == CK_DerivedToBase ||
88 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
89 E->getType()->isRecordType()) {
90 E = CE->getSubExpr();
91 auto *Derived =
92 cast<CXXRecordDecl>(E->getType()->castAs<RecordType>()->getDecl());
93 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
94 continue;
95 }
96
97 if (CE->getCastKind() == CK_NoOp) {
98 E = CE->getSubExpr();
99 continue;
100 }
101 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
102 if (!ME->isArrow()) {
103 assert(ME->getBase()->getType()->isRecordType())((ME->getBase()->getType()->isRecordType()) ? static_cast
<void> (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 103, __PRETTY_FUNCTION__))
;
104 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
105 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
106 E = ME->getBase();
107 Adjustments.push_back(SubobjectAdjustment(Field));
108 continue;
109 }
110 }
111 }
112 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
113 if (BO->getOpcode() == BO_PtrMemD) {
114 assert(BO->getRHS()->isRValue())((BO->getRHS()->isRValue()) ? static_cast<void> (
0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 114, __PRETTY_FUNCTION__))
;
115 E = BO->getLHS();
116 const MemberPointerType *MPT =
117 BO->getRHS()->getType()->getAs<MemberPointerType>();
118 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
119 continue;
120 } else if (BO->getOpcode() == BO_Comma) {
121 CommaLHSs.push_back(BO->getLHS());
122 E = BO->getRHS();
123 continue;
124 }
125 }
126
127 // Nothing changed.
128 break;
129 }
130 return E;
131}
132
133bool Expr::isKnownToHaveBooleanValue(bool Semantic) const {
134 const Expr *E = IgnoreParens();
135
136 // If this value has _Bool type, it is obvious 0/1.
137 if (E->getType()->isBooleanType()) return true;
138 // If this is a non-scalar-integer type, we don't care enough to try.
139 if (!E->getType()->isIntegralOrEnumerationType()) return false;
140
141 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
142 switch (UO->getOpcode()) {
143 case UO_Plus:
144 return UO->getSubExpr()->isKnownToHaveBooleanValue(Semantic);
145 case UO_LNot:
146 return true;
147 default:
148 return false;
149 }
150 }
151
152 // Only look through implicit casts. If the user writes
153 // '(int) (a && b)' treat it as an arbitrary int.
154 // FIXME: Should we look through any cast expression in !Semantic mode?
155 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
156 return CE->getSubExpr()->isKnownToHaveBooleanValue(Semantic);
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(Semantic) &&
176 BO->getRHS()->isKnownToHaveBooleanValue(Semantic);
177
178 case BO_Comma:
179 case BO_Assign:
180 return BO->getRHS()->isKnownToHaveBooleanValue(Semantic);
181 }
182 }
183
184 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
185 return CO->getTrueExpr()->isKnownToHaveBooleanValue(Semantic) &&
186 CO->getFalseExpr()->isKnownToHaveBooleanValue(Semantic);
187
188 if (isa<ObjCBoolLiteralExpr>(E))
189 return true;
190
191 if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E))
192 return OVE->getSourceExpr()->isKnownToHaveBooleanValue(Semantic);
193
194 if (const FieldDecl *FD = E->getSourceBitField())
195 if (!Semantic && FD->getType()->isUnsignedIntegerType() &&
196 !FD->getBitWidth()->isValueDependent() &&
197 FD->getBitWidthValue(FD->getASTContext()) == 1)
198 return true;
199
200 return false;
201}
202
203// Amusing macro metaprogramming hack: check whether a class provides
204// a more specific implementation of getExprLoc().
205//
206// See also Stmt.cpp:{getBeginLoc(),getEndLoc()}.
207namespace {
208 /// This implementation is used when a class provides a custom
209 /// implementation of getExprLoc.
210 template <class E, class T>
211 SourceLocation getExprLocImpl(const Expr *expr,
212 SourceLocation (T::*v)() const) {
213 return static_cast<const E*>(expr)->getExprLoc();
214 }
215
216 /// This implementation is used when a class doesn't provide
217 /// a custom implementation of getExprLoc. Overload resolution
218 /// should pick it over the implementation above because it's
219 /// more specialized according to function template partial ordering.
220 template <class E>
221 SourceLocation getExprLocImpl(const Expr *expr,
222 SourceLocation (Expr::*v)() const) {
223 return static_cast<const E *>(expr)->getBeginLoc();
224 }
225}
226
227SourceLocation Expr::getExprLoc() const {
228 switch (getStmtClass()) {
229 case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 229)
;
230#define ABSTRACT_STMT(type)
231#define STMT(type, base) \
232 case Stmt::type##Class: break;
233#define EXPR(type, base) \
234 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
235#include "clang/AST/StmtNodes.inc"
236 }
237 llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 237)
;
238}
239
240//===----------------------------------------------------------------------===//
241// Primary Expressions.
242//===----------------------------------------------------------------------===//
243
244static void AssertResultStorageKind(ConstantExpr::ResultStorageKind Kind) {
245 assert((Kind == ConstantExpr::RSK_APValue ||(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 247, __PRETTY_FUNCTION__))
246 Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) &&(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 247, __PRETTY_FUNCTION__))
247 "Invalid StorageKind Value")(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 247, __PRETTY_FUNCTION__))
;
248 (void)Kind;
249}
250
251ConstantExpr::ResultStorageKind
252ConstantExpr::getStorageKind(const APValue &Value) {
253 switch (Value.getKind()) {
254 case APValue::None:
255 case APValue::Indeterminate:
256 return ConstantExpr::RSK_None;
257 case APValue::Int:
258 if (!Value.getInt().needsCleanup())
259 return ConstantExpr::RSK_Int64;
260 LLVM_FALLTHROUGH[[gnu::fallthrough]];
261 default:
262 return ConstantExpr::RSK_APValue;
263 }
264}
265
266ConstantExpr::ResultStorageKind
267ConstantExpr::getStorageKind(const Type *T, const ASTContext &Context) {
268 if (T->isIntegralOrEnumerationType() && Context.getTypeInfo(T).Width <= 64)
269 return ConstantExpr::RSK_Int64;
270 return ConstantExpr::RSK_APValue;
271}
272
273ConstantExpr::ConstantExpr(Expr *SubExpr, ResultStorageKind StorageKind,
274 bool IsImmediateInvocation)
275 : FullExpr(ConstantExprClass, SubExpr) {
276 ConstantExprBits.ResultKind = StorageKind;
277 ConstantExprBits.APValueKind = APValue::None;
278 ConstantExprBits.IsUnsigned = false;
279 ConstantExprBits.BitWidth = 0;
280 ConstantExprBits.HasCleanup = false;
281 ConstantExprBits.IsImmediateInvocation = IsImmediateInvocation;
282
283 if (StorageKind == ConstantExpr::RSK_APValue)
284 ::new (getTrailingObjects<APValue>()) APValue();
285}
286
287ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
288 ResultStorageKind StorageKind,
289 bool IsImmediateInvocation) {
290 assert(!isa<ConstantExpr>(E))((!isa<ConstantExpr>(E)) ? static_cast<void> (0) :
__assert_fail ("!isa<ConstantExpr>(E)", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 290, __PRETTY_FUNCTION__))
;
291 AssertResultStorageKind(StorageKind);
292
293 unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
294 StorageKind == ConstantExpr::RSK_APValue,
295 StorageKind == ConstantExpr::RSK_Int64);
296 void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
297 return new (Mem) ConstantExpr(E, StorageKind, IsImmediateInvocation);
298}
299
300ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
301 const APValue &Result) {
302 ResultStorageKind StorageKind = getStorageKind(Result);
303 ConstantExpr *Self = Create(Context, E, StorageKind);
304 Self->SetResult(Result, Context);
305 return Self;
306}
307
308ConstantExpr::ConstantExpr(EmptyShell Empty, ResultStorageKind StorageKind)
309 : FullExpr(ConstantExprClass, Empty) {
310 ConstantExprBits.ResultKind = StorageKind;
311
312 if (StorageKind == ConstantExpr::RSK_APValue)
313 ::new (getTrailingObjects<APValue>()) APValue();
314}
315
316ConstantExpr *ConstantExpr::CreateEmpty(const ASTContext &Context,
317 ResultStorageKind StorageKind) {
318 AssertResultStorageKind(StorageKind);
319
320 unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
321 StorageKind == ConstantExpr::RSK_APValue,
322 StorageKind == ConstantExpr::RSK_Int64);
323 void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
324 return new (Mem) ConstantExpr(EmptyShell(), StorageKind);
325}
326
327void ConstantExpr::MoveIntoResult(APValue &Value, const ASTContext &Context) {
328 assert((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind &&(((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind
&& "Invalid storage for this value kind") ? static_cast
<void> (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 329, __PRETTY_FUNCTION__))
329 "Invalid storage for this value kind")(((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind
&& "Invalid storage for this value kind") ? static_cast
<void> (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 329, __PRETTY_FUNCTION__))
;
330 ConstantExprBits.APValueKind = Value.getKind();
331 switch (ConstantExprBits.ResultKind) {
332 case RSK_None:
333 return;
334 case RSK_Int64:
335 Int64Result() = *Value.getInt().getRawData();
336 ConstantExprBits.BitWidth = Value.getInt().getBitWidth();
337 ConstantExprBits.IsUnsigned = Value.getInt().isUnsigned();
338 return;
339 case RSK_APValue:
340 if (!ConstantExprBits.HasCleanup && Value.needsCleanup()) {
341 ConstantExprBits.HasCleanup = true;
342 Context.addDestruction(&APValueResult());
343 }
344 APValueResult() = std::move(Value);
345 return;
346 }
347 llvm_unreachable("Invalid ResultKind Bits")::llvm::llvm_unreachable_internal("Invalid ResultKind Bits", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 347)
;
348}
349
350llvm::APSInt ConstantExpr::getResultAsAPSInt() const {
351 switch (ConstantExprBits.ResultKind) {
352 case ConstantExpr::RSK_APValue:
353 return APValueResult().getInt();
354 case ConstantExpr::RSK_Int64:
355 return llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
356 ConstantExprBits.IsUnsigned);
357 default:
358 llvm_unreachable("invalid Accessor")::llvm::llvm_unreachable_internal("invalid Accessor", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 358)
;
359 }
360}
361
362APValue ConstantExpr::getAPValueResult() const {
363
364 switch (ConstantExprBits.ResultKind) {
365 case ConstantExpr::RSK_APValue:
366 return APValueResult();
367 case ConstantExpr::RSK_Int64:
368 return APValue(
369 llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
370 ConstantExprBits.IsUnsigned));
371 case ConstantExpr::RSK_None:
372 if (ConstantExprBits.APValueKind == APValue::Indeterminate)
373 return APValue::IndeterminateValue();
374 return APValue();
375 }
376 llvm_unreachable("invalid ResultKind")::llvm::llvm_unreachable_internal("invalid ResultKind", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 376)
;
377}
378
379DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D,
380 bool RefersToEnclosingVariableOrCapture, QualType T,
381 ExprValueKind VK, SourceLocation L,
382 const DeclarationNameLoc &LocInfo,
383 NonOdrUseReason NOUR)
384 : Expr(DeclRefExprClass, T, VK, OK_Ordinary), D(D), DNLoc(LocInfo) {
385 DeclRefExprBits.HasQualifier = false;
386 DeclRefExprBits.HasTemplateKWAndArgsInfo = false;
387 DeclRefExprBits.HasFoundDecl = false;
388 DeclRefExprBits.HadMultipleCandidates = false;
389 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
390 RefersToEnclosingVariableOrCapture;
391 DeclRefExprBits.NonOdrUseReason = NOUR;
392 DeclRefExprBits.Loc = L;
393 setDependence(computeDependence(this, Ctx));
394}
395
396DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
397 NestedNameSpecifierLoc QualifierLoc,
398 SourceLocation TemplateKWLoc, ValueDecl *D,
399 bool RefersToEnclosingVariableOrCapture,
400 const DeclarationNameInfo &NameInfo, NamedDecl *FoundD,
401 const TemplateArgumentListInfo *TemplateArgs,
402 QualType T, ExprValueKind VK, NonOdrUseReason NOUR)
403 : Expr(DeclRefExprClass, T, VK, OK_Ordinary), D(D),
404 DNLoc(NameInfo.getInfo()) {
405 DeclRefExprBits.Loc = NameInfo.getLoc();
406 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
407 if (QualifierLoc)
408 new (getTrailingObjects<NestedNameSpecifierLoc>())
409 NestedNameSpecifierLoc(QualifierLoc);
410 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
411 if (FoundD)
412 *getTrailingObjects<NamedDecl *>() = FoundD;
413 DeclRefExprBits.HasTemplateKWAndArgsInfo
414 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
415 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
416 RefersToEnclosingVariableOrCapture;
417 DeclRefExprBits.NonOdrUseReason = NOUR;
418 if (TemplateArgs) {
419 auto Deps = TemplateArgumentDependence::None;
420 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
421 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
422 Deps);
423 assert(!(Deps & TemplateArgumentDependence::Dependent) &&((!(Deps & TemplateArgumentDependence::Dependent) &&
"built a DeclRefExpr with dependent template args") ? static_cast
<void> (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 424, __PRETTY_FUNCTION__))
424 "built a DeclRefExpr with dependent template args")((!(Deps & TemplateArgumentDependence::Dependent) &&
"built a DeclRefExpr with dependent template args") ? static_cast
<void> (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 424, __PRETTY_FUNCTION__))
;
425 } else if (TemplateKWLoc.isValid()) {
426 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
427 TemplateKWLoc);
428 }
429 DeclRefExprBits.HadMultipleCandidates = 0;
430 setDependence(computeDependence(this, Ctx));
431}
432
433DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
434 NestedNameSpecifierLoc QualifierLoc,
435 SourceLocation TemplateKWLoc, ValueDecl *D,
436 bool RefersToEnclosingVariableOrCapture,
437 SourceLocation NameLoc, QualType T,
438 ExprValueKind VK, NamedDecl *FoundD,
439 const TemplateArgumentListInfo *TemplateArgs,
440 NonOdrUseReason NOUR) {
441 return Create(Context, QualifierLoc, TemplateKWLoc, D,
442 RefersToEnclosingVariableOrCapture,
443 DeclarationNameInfo(D->getDeclName(), NameLoc),
444 T, VK, FoundD, TemplateArgs, NOUR);
445}
446
447DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
448 NestedNameSpecifierLoc QualifierLoc,
449 SourceLocation TemplateKWLoc, ValueDecl *D,
450 bool RefersToEnclosingVariableOrCapture,
451 const DeclarationNameInfo &NameInfo,
452 QualType T, ExprValueKind VK,
453 NamedDecl *FoundD,
454 const TemplateArgumentListInfo *TemplateArgs,
455 NonOdrUseReason NOUR) {
456 // Filter out cases where the found Decl is the same as the value refenenced.
457 if (D == FoundD)
458 FoundD = nullptr;
459
460 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
461 std::size_t Size =
462 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
463 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
464 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
465 HasTemplateKWAndArgsInfo ? 1 : 0,
466 TemplateArgs ? TemplateArgs->size() : 0);
467
468 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
469 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
470 RefersToEnclosingVariableOrCapture, NameInfo,
471 FoundD, TemplateArgs, T, VK, NOUR);
472}
473
474DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
475 bool HasQualifier,
476 bool HasFoundDecl,
477 bool HasTemplateKWAndArgsInfo,
478 unsigned NumTemplateArgs) {
479 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)((NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo) ? static_cast
<void> (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 479, __PRETTY_FUNCTION__))
;
480 std::size_t Size =
481 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
482 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
483 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
484 NumTemplateArgs);
485 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
486 return new (Mem) DeclRefExpr(EmptyShell());
487}
488
489SourceLocation DeclRefExpr::getBeginLoc() const {
490 if (hasQualifier())
491 return getQualifierLoc().getBeginLoc();
492 return getNameInfo().getBeginLoc();
493}
494SourceLocation DeclRefExpr::getEndLoc() const {
495 if (hasExplicitTemplateArgs())
496 return getRAngleLoc();
497 return getNameInfo().getEndLoc();
498}
499
500PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK,
501 StringLiteral *SL)
502 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary) {
503 PredefinedExprBits.Kind = IK;
504 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 505, __PRETTY_FUNCTION__))
505 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 505, __PRETTY_FUNCTION__))
;
506 bool HasFunctionName = SL != nullptr;
507 PredefinedExprBits.HasFunctionName = HasFunctionName;
508 PredefinedExprBits.Loc = L;
509 if (HasFunctionName)
510 setFunctionName(SL);
511 setDependence(computeDependence(this));
512}
513
514PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName)
515 : Expr(PredefinedExprClass, Empty) {
516 PredefinedExprBits.HasFunctionName = HasFunctionName;
517}
518
519PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L,
520 QualType FNTy, IdentKind IK,
521 StringLiteral *SL) {
522 bool HasFunctionName = SL != nullptr;
523 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
524 alignof(PredefinedExpr));
525 return new (Mem) PredefinedExpr(L, FNTy, IK, SL);
526}
527
528PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx,
529 bool HasFunctionName) {
530 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
531 alignof(PredefinedExpr));
532 return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName);
533}
534
535StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) {
536 switch (IK) {
537 case Func:
538 return "__func__";
539 case Function:
540 return "__FUNCTION__";
541 case FuncDName:
542 return "__FUNCDNAME__";
543 case LFunction:
544 return "L__FUNCTION__";
545 case PrettyFunction:
546 return "__PRETTY_FUNCTION__";
547 case FuncSig:
548 return "__FUNCSIG__";
549 case LFuncSig:
550 return "L__FUNCSIG__";
551 case PrettyFunctionNoVirtual:
552 break;
553 }
554 llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 554)
;
555}
556
557// FIXME: Maybe this should use DeclPrinter with a special "print predefined
558// expr" policy instead.
559std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) {
560 ASTContext &Context = CurrentDecl->getASTContext();
561
562 if (IK == PredefinedExpr::FuncDName) {
1
Assuming 'IK' is not equal to FuncDName
2
Taking false branch
563 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
564 std::unique_ptr<MangleContext> MC;
565 MC.reset(Context.createMangleContext());
566
567 if (MC->shouldMangleDeclName(ND)) {
568 SmallString<256> Buffer;
569 llvm::raw_svector_ostream Out(Buffer);
570 GlobalDecl GD;
571 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
572 GD = GlobalDecl(CD, Ctor_Base);
573 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
574 GD = GlobalDecl(DD, Dtor_Base);
575 else if (ND->hasAttr<CUDAGlobalAttr>())
576 GD = GlobalDecl(cast<FunctionDecl>(ND));
577 else
578 GD = GlobalDecl(ND);
579 MC->mangleName(GD, Out);
580
581 if (!Buffer.empty() && Buffer.front() == '\01')
582 return std::string(Buffer.substr(1));
583 return std::string(Buffer.str());
584 } else
585 return std::string(ND->getIdentifier()->getName());
586 }
587 return "";
588 }
589 if (isa<BlockDecl>(CurrentDecl)) {
3
Assuming 'CurrentDecl' is not a 'BlockDecl'
4
Taking false branch
590 // For blocks we only emit something if it is enclosed in a function
591 // For top-level block we'd like to include the name of variable, but we
592 // don't have it at this point.
593 auto DC = CurrentDecl->getDeclContext();
594 if (DC->isFileContext())
595 return "";
596
597 SmallString<256> Buffer;
598 llvm::raw_svector_ostream Out(Buffer);
599 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
600 // For nested blocks, propagate up to the parent.
601 Out << ComputeName(IK, DCBlock);
602 else if (auto *DCDecl = dyn_cast<Decl>(DC))
603 Out << ComputeName(IK, DCDecl) << "_block_invoke";
604 return std::string(Out.str());
605 }
606 if (const FunctionDecl *FD
5.1
'FD' is non-null
5.1
'FD' is non-null
= dyn_cast<FunctionDecl>(CurrentDecl)) {
5
Assuming 'CurrentDecl' is a 'FunctionDecl'
6
Taking true branch
607 if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual &&
7
Assuming 'IK' is equal to PrettyFunction
608 IK != FuncSig && IK != LFuncSig)
609 return FD->getNameAsString();
610
611 SmallString<256> Name;
612 llvm::raw_svector_ostream Out(Name);
613
614 if (const CXXMethodDecl *MD
8.1
'MD' is null
8.1
'MD' is null
= dyn_cast<CXXMethodDecl>(FD)) {
8
Assuming 'FD' is not a 'CXXMethodDecl'
9
Taking false branch
615 if (MD->isVirtual() && IK != PrettyFunctionNoVirtual)
616 Out << "virtual ";
617 if (MD->isStatic())
618 Out << "static ";
619 }
620
621 PrintingPolicy Policy(Context.getLangOpts());
622 std::string Proto;
623 llvm::raw_string_ostream POut(Proto);
624
625 const FunctionDecl *Decl = FD;
626 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
10
Assuming 'Pattern' is null
11
Taking false branch
627 Decl = Pattern;
628 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
12
Assuming the object is not a 'FunctionType'
13
'AFT' initialized to a null pointer value
629 const FunctionProtoType *FT = nullptr;
630 if (FD->hasWrittenPrototype())
14
Assuming the condition is false
15
Taking false branch
631 FT = dyn_cast<FunctionProtoType>(AFT);
632
633 if (IK
15.1
'IK' is not equal to FuncSig
15.1
'IK' is not equal to FuncSig
== FuncSig || IK
15.2
'IK' is not equal to LFuncSig
15.2
'IK' is not equal to LFuncSig
== LFuncSig) {
16
Taking false branch
634 switch (AFT->getCallConv()) {
635 case CC_C: POut << "__cdecl "; break;
636 case CC_X86StdCall: POut << "__stdcall "; break;
637 case CC_X86FastCall: POut << "__fastcall "; break;
638 case CC_X86ThisCall: POut << "__thiscall "; break;
639 case CC_X86VectorCall: POut << "__vectorcall "; break;
640 case CC_X86RegCall: POut << "__regcall "; break;
641 // Only bother printing the conventions that MSVC knows about.
642 default: break;
643 }
644 }
645
646 FD->printQualifiedName(POut, Policy);
647
648 POut << "(";
649 if (FT
16.1
'FT' is null
16.1
'FT' is null
) {
17
Taking false branch
650 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
651 if (i) POut << ", ";
652 POut << Decl->getParamDecl(i)->getType().stream(Policy);
653 }
654
655 if (FT->isVariadic()) {
656 if (FD->getNumParams()) POut << ", ";
657 POut << "...";
658 } else if ((IK == FuncSig || IK == LFuncSig ||
659 !Context.getLangOpts().CPlusPlus) &&
660 !Decl->getNumParams()) {
661 POut << "void";
662 }
663 }
664 POut << ")";
665
666 if (const CXXMethodDecl *MD
18.1
'MD' is null
18.1
'MD' is null
= dyn_cast<CXXMethodDecl>(FD)) {
18
'FD' is not a 'CXXMethodDecl'
19
Taking false branch
667 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 667, __PRETTY_FUNCTION__))
;
668 if (FT->isConst())
669 POut << " const";
670 if (FT->isVolatile())
671 POut << " volatile";
672 RefQualifierKind Ref = MD->getRefQualifier();
673 if (Ref == RQ_LValue)
674 POut << " &";
675 else if (Ref == RQ_RValue)
676 POut << " &&";
677 }
678
679 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
680 SpecsTy Specs;
681 const DeclContext *Ctx = FD->getDeclContext();
682 while (Ctx && isa<NamedDecl>(Ctx)) {
20
Assuming 'Ctx' is null
683 const ClassTemplateSpecializationDecl *Spec
684 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
685 if (Spec && !Spec->isExplicitSpecialization())
686 Specs.push_back(Spec);
687 Ctx = Ctx->getParent();
688 }
689
690 std::string TemplateParams;
691 llvm::raw_string_ostream TOut(TemplateParams);
692 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
28
Loop condition is false. Execution continues on line 708
693 I != E; ++I) {
21
Calling 'operator!=<const clang::ClassTemplateSpecializationDecl **>'
27
Returning from 'operator!=<const clang::ClassTemplateSpecializationDecl **>'
694 const TemplateParameterList *Params
695 = (*I)->getSpecializedTemplate()->getTemplateParameters();
696 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
697 assert(Params->size() == Args.size())((Params->size() == Args.size()) ? static_cast<void>
(0) : __assert_fail ("Params->size() == Args.size()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 697, __PRETTY_FUNCTION__))
;
698 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
699 StringRef Param = Params->getParam(i)->getName();
700 if (Param.empty()) continue;
701 TOut << Param << " = ";
702 Args.get(i).print(Policy, TOut);
703 TOut << ", ";
704 }
705 }
706
707 FunctionTemplateSpecializationInfo *FSI
708 = FD->getTemplateSpecializationInfo();
709 if (FSI && !FSI->isExplicitSpecialization()) {
29
Assuming 'FSI' is null
710 const TemplateParameterList* Params
711 = FSI->getTemplate()->getTemplateParameters();
712 const TemplateArgumentList* Args = FSI->TemplateArguments;
713 assert(Params->size() == Args->size())((Params->size() == Args->size()) ? static_cast<void
> (0) : __assert_fail ("Params->size() == Args->size()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 713, __PRETTY_FUNCTION__))
;
714 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
715 StringRef Param = Params->getParam(i)->getName();
716 if (Param.empty()) continue;
717 TOut << Param << " = ";
718 Args->get(i).print(Policy, TOut);
719 TOut << ", ";
720 }
721 }
722
723 TOut.flush();
724 if (!TemplateParams.empty()) {
30
Assuming the condition is false
31
Taking false branch
725 // remove the trailing comma and space
726 TemplateParams.resize(TemplateParams.size() - 2);
727 POut << " [" << TemplateParams << "]";
728 }
729
730 POut.flush();
731
732 // Print "auto" for all deduced return types. This includes C++1y return
733 // type deduction and lambdas. For trailing return types resolve the
734 // decltype expression. Otherwise print the real type when this is
735 // not a constructor or destructor.
736 if (isa<CXXMethodDecl>(FD) &&
32
'FD' is not a 'CXXMethodDecl'
737 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
738 Proto = "auto " + Proto;
739 else if (FT
32.1
'FT' is null
32.1
'FT' is null
&& FT->getReturnType()->getAs<DecltypeType>())
33
Taking false branch
740 FT->getReturnType()
741 ->getAs<DecltypeType>()
742 ->getUnderlyingType()
743 .getAsStringInternal(Proto, Policy);
744 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
34
Assuming 'FD' is not a 'CXXConstructorDecl'
35
Assuming 'FD' is not a 'CXXDestructorDecl'
36
Taking true branch
745 AFT->getReturnType().getAsStringInternal(Proto, Policy);
37
Called C++ object pointer is null
746
747 Out << Proto;
748
749 return std::string(Name);
750 }
751 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
752 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
753 // Skip to its enclosing function or method, but not its enclosing
754 // CapturedDecl.
755 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
756 const Decl *D = Decl::castFromDeclContext(DC);
757 return ComputeName(IK, D);
758 }
759 llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 759)
;
760 }
761 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
762 SmallString<256> Name;
763 llvm::raw_svector_ostream Out(Name);
764 Out << (MD->isInstanceMethod() ? '-' : '+');
765 Out << '[';
766
767 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
768 // a null check to avoid a crash.
769 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
770 Out << *ID;
771
772 if (const ObjCCategoryImplDecl *CID =
773 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
774 Out << '(' << *CID << ')';
775
776 Out << ' ';
777 MD->getSelector().print(Out);
778 Out << ']';
779
780 return std::string(Name);
781 }
782 if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) {
783 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
784 return "top level";
785 }
786 return "";
787}
788
789void APNumericStorage::setIntValue(const ASTContext &C,
790 const llvm::APInt &Val) {
791 if (hasAllocation())
792 C.Deallocate(pVal);
793
794 BitWidth = Val.getBitWidth();
795 unsigned NumWords = Val.getNumWords();
796 const uint64_t* Words = Val.getRawData();
797 if (NumWords > 1) {
798 pVal = new (C) uint64_t[NumWords];
799 std::copy(Words, Words + NumWords, pVal);
800 } else if (NumWords == 1)
801 VAL = Words[0];
802 else
803 VAL = 0;
804}
805
806IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
807 QualType type, SourceLocation l)
808 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary), Loc(l) {
809 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 809, __PRETTY_FUNCTION__))
;
810 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 811, __PRETTY_FUNCTION__))
811 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 811, __PRETTY_FUNCTION__))
;
812 setValue(C, V);
813 setDependence(ExprDependence::None);
814}
815
816IntegerLiteral *
817IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
818 QualType type, SourceLocation l) {
819 return new (C) IntegerLiteral(C, V, type, l);
820}
821
822IntegerLiteral *
823IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
824 return new (C) IntegerLiteral(Empty);
825}
826
827FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
828 QualType type, SourceLocation l,
829 unsigned Scale)
830 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary), Loc(l),
831 Scale(Scale) {
832 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 832, __PRETTY_FUNCTION__))
;
833 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 834, __PRETTY_FUNCTION__))
834 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 834, __PRETTY_FUNCTION__))
;
835 setValue(C, V);
836 setDependence(ExprDependence::None);
837}
838
839FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
840 const llvm::APInt &V,
841 QualType type,
842 SourceLocation l,
843 unsigned Scale) {
844 return new (C) FixedPointLiteral(C, V, type, l, Scale);
845}
846
847FixedPointLiteral *FixedPointLiteral::Create(const ASTContext &C,
848 EmptyShell Empty) {
849 return new (C) FixedPointLiteral(Empty);
850}
851
852std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
853 // Currently the longest decimal number that can be printed is the max for an
854 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
855 // which is 43 characters.
856 SmallString<64> S;
857 FixedPointValueToString(
858 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
859 return std::string(S.str());
860}
861
862FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
863 bool isexact, QualType Type, SourceLocation L)
864 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary), Loc(L) {
865 setSemantics(V.getSemantics());
866 FloatingLiteralBits.IsExact = isexact;
867 setValue(C, V);
868 setDependence(ExprDependence::None);
869}
870
871FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
872 : Expr(FloatingLiteralClass, Empty) {
873 setRawSemantics(llvm::APFloatBase::S_IEEEhalf);
874 FloatingLiteralBits.IsExact = false;
875}
876
877FloatingLiteral *
878FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
879 bool isexact, QualType Type, SourceLocation L) {
880 return new (C) FloatingLiteral(C, V, isexact, Type, L);
881}
882
883FloatingLiteral *
884FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
885 return new (C) FloatingLiteral(C, Empty);
886}
887
888/// getValueAsApproximateDouble - This returns the value as an inaccurate
889/// double. Note that this may cause loss of precision, but is useful for
890/// debugging dumps, etc.
891double FloatingLiteral::getValueAsApproximateDouble() const {
892 llvm::APFloat V = getValue();
893 bool ignored;
894 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
895 &ignored);
896 return V.convertToDouble();
897}
898
899unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target,
900 StringKind SK) {
901 unsigned CharByteWidth = 0;
902 switch (SK) {
903 case Ascii:
904 case UTF8:
905 CharByteWidth = Target.getCharWidth();
906 break;
907 case Wide:
908 CharByteWidth = Target.getWCharWidth();
909 break;
910 case UTF16:
911 CharByteWidth = Target.getChar16Width();
912 break;
913 case UTF32:
914 CharByteWidth = Target.getChar32Width();
915 break;
916 }
917 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 917, __PRETTY_FUNCTION__))
;
918 CharByteWidth /= 8;
919 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 920, __PRETTY_FUNCTION__))
920 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 920, __PRETTY_FUNCTION__))
;
921 return CharByteWidth;
922}
923
924StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str,
925 StringKind Kind, bool Pascal, QualType Ty,
926 const SourceLocation *Loc,
927 unsigned NumConcatenated)
928 : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary) {
929 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 930, __PRETTY_FUNCTION__))
930 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 930, __PRETTY_FUNCTION__))
;
931 unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind);
932 unsigned ByteLength = Str.size();
933 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 934, __PRETTY_FUNCTION__))
934 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 934, __PRETTY_FUNCTION__))
;
935
936 // Avoid the expensive division. The compiler should be able to figure it
937 // out by itself. However as of clang 7, even with the appropriate
938 // llvm_unreachable added just here, it is not able to do so.
939 unsigned Length;
940 switch (CharByteWidth) {
941 case 1:
942 Length = ByteLength;
943 break;
944 case 2:
945 Length = ByteLength / 2;
946 break;
947 case 4:
948 Length = ByteLength / 4;
949 break;
950 default:
951 llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 951)
;
952 }
953
954 StringLiteralBits.Kind = Kind;
955 StringLiteralBits.CharByteWidth = CharByteWidth;
956 StringLiteralBits.IsPascal = Pascal;
957 StringLiteralBits.NumConcatenated = NumConcatenated;
958 *getTrailingObjects<unsigned>() = Length;
959
960 // Initialize the trailing array of SourceLocation.
961 // This is safe since SourceLocation is POD-like.
962 std::memcpy(getTrailingObjects<SourceLocation>(), Loc,
963 NumConcatenated * sizeof(SourceLocation));
964
965 // Initialize the trailing array of char holding the string data.
966 std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength);
967
968 setDependence(ExprDependence::None);
969}
970
971StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated,
972 unsigned Length, unsigned CharByteWidth)
973 : Expr(StringLiteralClass, Empty) {
974 StringLiteralBits.CharByteWidth = CharByteWidth;
975 StringLiteralBits.NumConcatenated = NumConcatenated;
976 *getTrailingObjects<unsigned>() = Length;
977}
978
979StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str,
980 StringKind Kind, bool Pascal, QualType Ty,
981 const SourceLocation *Loc,
982 unsigned NumConcatenated) {
983 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
984 1, NumConcatenated, Str.size()),
985 alignof(StringLiteral));
986 return new (Mem)
987 StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated);
988}
989
990StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx,
991 unsigned NumConcatenated,
992 unsigned Length,
993 unsigned CharByteWidth) {
994 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
995 1, NumConcatenated, Length * CharByteWidth),
996 alignof(StringLiteral));
997 return new (Mem)
998 StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth);
999}
1000
1001void StringLiteral::outputString(raw_ostream &OS) const {
1002 switch (getKind()) {
1003 case Ascii: break; // no prefix.
1004 case Wide: OS << 'L'; break;
1005 case UTF8: OS << "u8"; break;
1006 case UTF16: OS << 'u'; break;
1007 case UTF32: OS << 'U'; break;
1008 }
1009 OS << '"';
1010 static const char Hex[] = "0123456789ABCDEF";
1011
1012 unsigned LastSlashX = getLength();
1013 for (unsigned I = 0, N = getLength(); I != N; ++I) {
1014 switch (uint32_t Char = getCodeUnit(I)) {
1015 default:
1016 // FIXME: Convert UTF-8 back to codepoints before rendering.
1017
1018 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
1019 // Leave invalid surrogates alone; we'll use \x for those.
1020 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
1021 Char <= 0xdbff) {
1022 uint32_t Trail = getCodeUnit(I + 1);
1023 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
1024 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
1025 ++I;
1026 }
1027 }
1028
1029 if (Char > 0xff) {
1030 // If this is a wide string, output characters over 0xff using \x
1031 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
1032 // codepoint: use \x escapes for invalid codepoints.
1033 if (getKind() == Wide ||
1034 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
1035 // FIXME: Is this the best way to print wchar_t?
1036 OS << "\\x";
1037 int Shift = 28;
1038 while ((Char >> Shift) == 0)
1039 Shift -= 4;
1040 for (/**/; Shift >= 0; Shift -= 4)
1041 OS << Hex[(Char >> Shift) & 15];
1042 LastSlashX = I;
1043 break;
1044 }
1045
1046 if (Char > 0xffff)
1047 OS << "\\U00"
1048 << Hex[(Char >> 20) & 15]
1049 << Hex[(Char >> 16) & 15];
1050 else
1051 OS << "\\u";
1052 OS << Hex[(Char >> 12) & 15]
1053 << Hex[(Char >> 8) & 15]
1054 << Hex[(Char >> 4) & 15]
1055 << Hex[(Char >> 0) & 15];
1056 break;
1057 }
1058
1059 // If we used \x... for the previous character, and this character is a
1060 // hexadecimal digit, prevent it being slurped as part of the \x.
1061 if (LastSlashX + 1 == I) {
1062 switch (Char) {
1063 case '0': case '1': case '2': case '3': case '4':
1064 case '5': case '6': case '7': case '8': case '9':
1065 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
1066 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
1067 OS << "\"\"";
1068 }
1069 }
1070
1071 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1072, __PRETTY_FUNCTION__))
1072 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1072, __PRETTY_FUNCTION__))
;
1073
1074 if (isPrintable(Char))
1075 OS << (char)Char;
1076 else // Output anything hard as an octal escape.
1077 OS << '\\'
1078 << (char)('0' + ((Char >> 6) & 7))
1079 << (char)('0' + ((Char >> 3) & 7))
1080 << (char)('0' + ((Char >> 0) & 7));
1081 break;
1082 // Handle some common non-printable cases to make dumps prettier.
1083 case '\\': OS << "\\\\"; break;
1084 case '"': OS << "\\\""; break;
1085 case '\a': OS << "\\a"; break;
1086 case '\b': OS << "\\b"; break;
1087 case '\f': OS << "\\f"; break;
1088 case '\n': OS << "\\n"; break;
1089 case '\r': OS << "\\r"; break;
1090 case '\t': OS << "\\t"; break;
1091 case '\v': OS << "\\v"; break;
1092 }
1093 }
1094 OS << '"';
1095}
1096
1097/// getLocationOfByte - Return a source location that points to the specified
1098/// byte of this string literal.
1099///
1100/// Strings are amazingly complex. They can be formed from multiple tokens and
1101/// can have escape sequences in them in addition to the usual trigraph and
1102/// escaped newline business. This routine handles this complexity.
1103///
1104/// The *StartToken sets the first token to be searched in this function and
1105/// the *StartTokenByteOffset is the byte offset of the first token. Before
1106/// returning, it updates the *StartToken to the TokNo of the token being found
1107/// and sets *StartTokenByteOffset to the byte offset of the token in the
1108/// string.
1109/// Using these two parameters can reduce the time complexity from O(n^2) to
1110/// O(n) if one wants to get the location of byte for all the tokens in a
1111/// string.
1112///
1113SourceLocation
1114StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1115 const LangOptions &Features,
1116 const TargetInfo &Target, unsigned *StartToken,
1117 unsigned *StartTokenByteOffset) const {
1118 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1120, __PRETTY_FUNCTION__))
1119 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1120, __PRETTY_FUNCTION__))
1120 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1120, __PRETTY_FUNCTION__))
;
1121
1122 // Loop over all of the tokens in this string until we find the one that
1123 // contains the byte we're looking for.
1124 unsigned TokNo = 0;
1125 unsigned StringOffset = 0;
1126 if (StartToken)
1127 TokNo = *StartToken;
1128 if (StartTokenByteOffset) {
1129 StringOffset = *StartTokenByteOffset;
1130 ByteNo -= StringOffset;
1131 }
1132 while (1) {
1133 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1133, __PRETTY_FUNCTION__))
;
1134 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1135
1136 // Get the spelling of the string so that we can get the data that makes up
1137 // the string literal, not the identifier for the macro it is potentially
1138 // expanded through.
1139 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1140
1141 // Re-lex the token to get its length and original spelling.
1142 std::pair<FileID, unsigned> LocInfo =
1143 SM.getDecomposedLoc(StrTokSpellingLoc);
1144 bool Invalid = false;
1145 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1146 if (Invalid) {
1147 if (StartTokenByteOffset != nullptr)
1148 *StartTokenByteOffset = StringOffset;
1149 if (StartToken != nullptr)
1150 *StartToken = TokNo;
1151 return StrTokSpellingLoc;
1152 }
1153
1154 const char *StrData = Buffer.data()+LocInfo.second;
1155
1156 // Create a lexer starting at the beginning of this token.
1157 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1158 Buffer.begin(), StrData, Buffer.end());
1159 Token TheTok;
1160 TheLexer.LexFromRawLexer(TheTok);
1161
1162 // Use the StringLiteralParser to compute the length of the string in bytes.
1163 StringLiteralParser SLP(TheTok, SM, Features, Target);
1164 unsigned TokNumBytes = SLP.GetStringLength();
1165
1166 // If the byte is in this token, return the location of the byte.
1167 if (ByteNo < TokNumBytes ||
1168 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1169 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1170
1171 // Now that we know the offset of the token in the spelling, use the
1172 // preprocessor to get the offset in the original source.
1173 if (StartTokenByteOffset != nullptr)
1174 *StartTokenByteOffset = StringOffset;
1175 if (StartToken != nullptr)
1176 *StartToken = TokNo;
1177 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1178 }
1179
1180 // Move to the next string token.
1181 StringOffset += TokNumBytes;
1182 ++TokNo;
1183 ByteNo -= TokNumBytes;
1184 }
1185}
1186
1187/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1188/// corresponds to, e.g. "sizeof" or "[pre]++".
1189StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1190 switch (Op) {
1191#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1192#include "clang/AST/OperationKinds.def"
1193 }
1194 llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1194)
;
1195}
1196
1197UnaryOperatorKind
1198UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1199 switch (OO) {
1200 default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1200)
;
1201 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1202 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1203 case OO_Amp: return UO_AddrOf;
1204 case OO_Star: return UO_Deref;
1205 case OO_Plus: return UO_Plus;
1206 case OO_Minus: return UO_Minus;
1207 case OO_Tilde: return UO_Not;
1208 case OO_Exclaim: return UO_LNot;
1209 case OO_Coawait: return UO_Coawait;
1210 }
1211}
1212
1213OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1214 switch (Opc) {
1215 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1216 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1217 case UO_AddrOf: return OO_Amp;
1218 case UO_Deref: return OO_Star;
1219 case UO_Plus: return OO_Plus;
1220 case UO_Minus: return OO_Minus;
1221 case UO_Not: return OO_Tilde;
1222 case UO_LNot: return OO_Exclaim;
1223 case UO_Coawait: return OO_Coawait;
1224 default: return OO_None;
1225 }
1226}
1227
1228
1229//===----------------------------------------------------------------------===//
1230// Postfix Operators.
1231//===----------------------------------------------------------------------===//
1232
1233CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs,
1234 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1235 SourceLocation RParenLoc, FPOptionsOverride FPFeatures,
1236 unsigned MinNumArgs, ADLCallKind UsesADL)
1237 : Expr(SC, Ty, VK, OK_Ordinary), RParenLoc(RParenLoc) {
1238 NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1239 unsigned NumPreArgs = PreArgs.size();
1240 CallExprBits.NumPreArgs = NumPreArgs;
1241 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1241, __PRETTY_FUNCTION__))
;
1242
1243 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1244 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1245 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1246, __PRETTY_FUNCTION__))
1246 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1246, __PRETTY_FUNCTION__))
;
1247
1248 CallExprBits.UsesADL = static_cast<bool>(UsesADL);
1249
1250 setCallee(Fn);
1251 for (unsigned I = 0; I != NumPreArgs; ++I)
1252 setPreArg(I, PreArgs[I]);
1253 for (unsigned I = 0; I != Args.size(); ++I)
1254 setArg(I, Args[I]);
1255 for (unsigned I = Args.size(); I != NumArgs; ++I)
1256 setArg(I, nullptr);
1257
1258 setDependence(computeDependence(this, PreArgs));
1259
1260 CallExprBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
1261 if (hasStoredFPFeatures())
1262 setStoredFPFeatures(FPFeatures);
1263}
1264
1265CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs,
1266 bool HasFPFeatures, EmptyShell Empty)
1267 : Expr(SC, Empty), NumArgs(NumArgs) {
1268 CallExprBits.NumPreArgs = NumPreArgs;
1269 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1269, __PRETTY_FUNCTION__))
;
1270
1271 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1272 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1273 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1274, __PRETTY_FUNCTION__))
1274 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1274, __PRETTY_FUNCTION__))
;
1275 CallExprBits.HasFPFeatures = HasFPFeatures;
1276}
1277
1278CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn,
1279 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1280 SourceLocation RParenLoc,
1281 FPOptionsOverride FPFeatures, unsigned MinNumArgs,
1282 ADLCallKind UsesADL) {
1283 unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1284 unsigned SizeOfTrailingObjects = CallExpr::sizeOfTrailingObjects(
1285 /*NumPreArgs=*/0, NumArgs, FPFeatures.requiresTrailingStorage());
1286 void *Mem =
1287 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1288 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK,
1289 RParenLoc, FPFeatures, MinNumArgs, UsesADL);
1290}
1291
1292CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
1293 ExprValueKind VK, SourceLocation RParenLoc,
1294 ADLCallKind UsesADL) {
1295 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1296, __PRETTY_FUNCTION__))
1296 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1296, __PRETTY_FUNCTION__))
;
1297 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty,
1298 VK, RParenLoc, FPOptionsOverride(),
1299 /*MinNumArgs=*/0, UsesADL);
1300}
1301
1302CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs,
1303 bool HasFPFeatures, EmptyShell Empty) {
1304 unsigned SizeOfTrailingObjects =
1305 CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs, HasFPFeatures);
1306 void *Mem =
1307 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1308 return new (Mem)
1309 CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, HasFPFeatures, Empty);
1310}
1311
1312unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) {
1313 switch (SC) {
1314 case CallExprClass:
1315 return sizeof(CallExpr);
1316 case CXXOperatorCallExprClass:
1317 return sizeof(CXXOperatorCallExpr);
1318 case CXXMemberCallExprClass:
1319 return sizeof(CXXMemberCallExpr);
1320 case UserDefinedLiteralClass:
1321 return sizeof(UserDefinedLiteral);
1322 case CUDAKernelCallExprClass:
1323 return sizeof(CUDAKernelCallExpr);
1324 default:
1325 llvm_unreachable("unexpected class deriving from CallExpr!")::llvm::llvm_unreachable_internal("unexpected class deriving from CallExpr!"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1325)
;
1326 }
1327}
1328
1329Decl *Expr::getReferencedDeclOfCallee() {
1330 Expr *CEE = IgnoreParenImpCasts();
1331
1332 while (SubstNonTypeTemplateParmExpr *NTTP =
1333 dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1334 CEE = NTTP->getReplacement()->IgnoreParenImpCasts();
1335 }
1336
1337 // If we're calling a dereference, look at the pointer instead.
1338 while (true) {
1339 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1340 if (BO->isPtrMemOp()) {
1341 CEE = BO->getRHS()->IgnoreParenImpCasts();
1342 continue;
1343 }
1344 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1345 if (UO->getOpcode() == UO_Deref || UO->getOpcode() == UO_AddrOf ||
1346 UO->getOpcode() == UO_Plus) {
1347 CEE = UO->getSubExpr()->IgnoreParenImpCasts();
1348 continue;
1349 }
1350 }
1351 break;
1352 }
1353
1354 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1355 return DRE->getDecl();
1356 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1357 return ME->getMemberDecl();
1358 if (auto *BE = dyn_cast<BlockExpr>(CEE))
1359 return BE->getBlockDecl();
1360
1361 return nullptr;
1362}
1363
1364/// If this is a call to a builtin, return the builtin ID. If not, return 0.
1365unsigned CallExpr::getBuiltinCallee() const {
1366 auto *FDecl =
1367 dyn_cast_or_null<FunctionDecl>(getCallee()->getReferencedDeclOfCallee());
1368 return FDecl ? FDecl->getBuiltinID() : 0;
1369}
1370
1371bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1372 if (unsigned BI = getBuiltinCallee())
1373 return Ctx.BuiltinInfo.isUnevaluated(BI);
1374 return false;
1375}
1376
1377QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1378 const Expr *Callee = getCallee();
1379 QualType CalleeType = Callee->getType();
1380 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1381 CalleeType = FnTypePtr->getPointeeType();
1382 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1383 CalleeType = BPT->getPointeeType();
1384 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1385 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1386 return Ctx.VoidTy;
1387
1388 // This should never be overloaded and so should never return null.
1389 CalleeType = Expr::findBoundMemberType(Callee);
1390 }
1391
1392 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1393 return FnType->getReturnType();
1394}
1395
1396const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const {
1397 // If the return type is a struct, union, or enum that is marked nodiscard,
1398 // then return the return type attribute.
1399 if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl())
1400 if (const auto *A = TD->getAttr<WarnUnusedResultAttr>())
1401 return A;
1402
1403 // Otherwise, see if the callee is marked nodiscard and return that attribute
1404 // instead.
1405 const Decl *D = getCalleeDecl();
1406 return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr;
1407}
1408
1409SourceLocation CallExpr::getBeginLoc() const {
1410 if (isa<CXXOperatorCallExpr>(this))
1411 return cast<CXXOperatorCallExpr>(this)->getBeginLoc();
1412
1413 SourceLocation begin = getCallee()->getBeginLoc();
1414 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1415 begin = getArg(0)->getBeginLoc();
1416 return begin;
1417}
1418SourceLocation CallExpr::getEndLoc() const {
1419 if (isa<CXXOperatorCallExpr>(this))
1420 return cast<CXXOperatorCallExpr>(this)->getEndLoc();
1421
1422 SourceLocation end = getRParenLoc();
1423 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1424 end = getArg(getNumArgs() - 1)->getEndLoc();
1425 return end;
1426}
1427
1428OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1429 SourceLocation OperatorLoc,
1430 TypeSourceInfo *tsi,
1431 ArrayRef<OffsetOfNode> comps,
1432 ArrayRef<Expr*> exprs,
1433 SourceLocation RParenLoc) {
1434 void *Mem = C.Allocate(
1435 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1436
1437 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1438 RParenLoc);
1439}
1440
1441OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1442 unsigned numComps, unsigned numExprs) {
1443 void *Mem =
1444 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1445 return new (Mem) OffsetOfExpr(numComps, numExprs);
1446}
1447
1448OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1449 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1450 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr *> exprs,
1451 SourceLocation RParenLoc)
1452 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary),
1453 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1454 NumComps(comps.size()), NumExprs(exprs.size()) {
1455 for (unsigned i = 0; i != comps.size(); ++i)
1456 setComponent(i, comps[i]);
1457 for (unsigned i = 0; i != exprs.size(); ++i)
1458 setIndexExpr(i, exprs[i]);
1459
1460 setDependence(computeDependence(this));
1461}
1462
1463IdentifierInfo *OffsetOfNode::getFieldName() const {
1464 assert(getKind() == Field || getKind() == Identifier)((getKind() == Field || getKind() == Identifier) ? static_cast
<void> (0) : __assert_fail ("getKind() == Field || getKind() == Identifier"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1464, __PRETTY_FUNCTION__))
;
1465 if (getKind() == Field)
1466 return getField()->getIdentifier();
1467
1468 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1469}
1470
1471UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1472 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1473 SourceLocation op, SourceLocation rp)
1474 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary),
1475 OpLoc(op), RParenLoc(rp) {
1476 assert(ExprKind <= UETT_Last && "invalid enum value!")((ExprKind <= UETT_Last && "invalid enum value!") ?
static_cast<void> (0) : __assert_fail ("ExprKind <= UETT_Last && \"invalid enum value!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1476, __PRETTY_FUNCTION__))
;
1477 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1478 assert(static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind &&((static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits
.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!"
) ? static_cast<void> (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1479, __PRETTY_FUNCTION__))
1479 "UnaryExprOrTypeTraitExprBits.Kind overflow!")((static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits
.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!"
) ? static_cast<void> (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1479, __PRETTY_FUNCTION__))
;
1480 UnaryExprOrTypeTraitExprBits.IsType = false;
1481 Argument.Ex = E;
1482 setDependence(computeDependence(this));
1483}
1484
1485MemberExpr::MemberExpr(Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
1486 ValueDecl *MemberDecl,
1487 const DeclarationNameInfo &NameInfo, QualType T,
1488 ExprValueKind VK, ExprObjectKind OK,
1489 NonOdrUseReason NOUR)
1490 : Expr(MemberExprClass, T, VK, OK), Base(Base), MemberDecl(MemberDecl),
1491 MemberDNLoc(NameInfo.getInfo()), MemberLoc(NameInfo.getLoc()) {
1492 assert(!NameInfo.getName() ||((!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo
.getName()) ? static_cast<void> (0) : __assert_fail ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1493, __PRETTY_FUNCTION__))
1493 MemberDecl->getDeclName() == NameInfo.getName())((!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo
.getName()) ? static_cast<void> (0) : __assert_fail ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1493, __PRETTY_FUNCTION__))
;
1494 MemberExprBits.IsArrow = IsArrow;
1495 MemberExprBits.HasQualifierOrFoundDecl = false;
1496 MemberExprBits.HasTemplateKWAndArgsInfo = false;
1497 MemberExprBits.HadMultipleCandidates = false;
1498 MemberExprBits.NonOdrUseReason = NOUR;
1499 MemberExprBits.OperatorLoc = OperatorLoc;
1500 setDependence(computeDependence(this));
1501}
1502
1503MemberExpr *MemberExpr::Create(
1504 const ASTContext &C, Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
1505 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1506 ValueDecl *MemberDecl, DeclAccessPair FoundDecl,
1507 DeclarationNameInfo NameInfo, const TemplateArgumentListInfo *TemplateArgs,
1508 QualType T, ExprValueKind VK, ExprObjectKind OK, NonOdrUseReason NOUR) {
1509 bool HasQualOrFound = QualifierLoc || FoundDecl.getDecl() != MemberDecl ||
1510 FoundDecl.getAccess() != MemberDecl->getAccess();
1511 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
1512 std::size_t Size =
1513 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1514 TemplateArgumentLoc>(
1515 HasQualOrFound ? 1 : 0, HasTemplateKWAndArgsInfo ? 1 : 0,
1516 TemplateArgs ? TemplateArgs->size() : 0);
1517
1518 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1519 MemberExpr *E = new (Mem) MemberExpr(Base, IsArrow, OperatorLoc, MemberDecl,
1520 NameInfo, T, VK, OK, NOUR);
1521
1522 // FIXME: remove remaining dependence computation to computeDependence().
1523 auto Deps = E->getDependence();
1524 if (HasQualOrFound) {
1525 // FIXME: Wrong. We should be looking at the member declaration we found.
1526 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent())
1527 Deps |= ExprDependence::TypeValueInstantiation;
1528 else if (QualifierLoc &&
1529 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1530 Deps |= ExprDependence::Instantiation;
1531
1532 E->MemberExprBits.HasQualifierOrFoundDecl = true;
1533
1534 MemberExprNameQualifier *NQ =
1535 E->getTrailingObjects<MemberExprNameQualifier>();
1536 NQ->QualifierLoc = QualifierLoc;
1537 NQ->FoundDecl = FoundDecl;
1538 }
1539
1540 E->MemberExprBits.HasTemplateKWAndArgsInfo =
1541 TemplateArgs || TemplateKWLoc.isValid();
1542
1543 if (TemplateArgs) {
1544 auto TemplateArgDeps = TemplateArgumentDependence::None;
1545 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1546 TemplateKWLoc, *TemplateArgs,
1547 E->getTrailingObjects<TemplateArgumentLoc>(), TemplateArgDeps);
1548 if (TemplateArgDeps & TemplateArgumentDependence::Instantiation)
1549 Deps |= ExprDependence::Instantiation;
1550 } else if (TemplateKWLoc.isValid()) {
1551 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1552 TemplateKWLoc);
1553 }
1554 E->setDependence(Deps);
1555
1556 return E;
1557}
1558
1559MemberExpr *MemberExpr::CreateEmpty(const ASTContext &Context,
1560 bool HasQualifier, bool HasFoundDecl,
1561 bool HasTemplateKWAndArgsInfo,
1562 unsigned NumTemplateArgs) {
1563 assert((!NumTemplateArgs || HasTemplateKWAndArgsInfo) &&(((!NumTemplateArgs || HasTemplateKWAndArgsInfo) && "template args but no template arg info?"
) ? static_cast<void> (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1564, __PRETTY_FUNCTION__))
1564 "template args but no template arg info?")(((!NumTemplateArgs || HasTemplateKWAndArgsInfo) && "template args but no template arg info?"
) ? static_cast<void> (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1564, __PRETTY_FUNCTION__))
;
1565 bool HasQualOrFound = HasQualifier || HasFoundDecl;
1566 std::size_t Size =
1567 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1568 TemplateArgumentLoc>(HasQualOrFound ? 1 : 0,
1569 HasTemplateKWAndArgsInfo ? 1 : 0,
1570 NumTemplateArgs);
1571 void *Mem = Context.Allocate(Size, alignof(MemberExpr));
1572 return new (Mem) MemberExpr(EmptyShell());
1573}
1574
1575SourceLocation MemberExpr::getBeginLoc() const {
1576 if (isImplicitAccess()) {
1577 if (hasQualifier())
1578 return getQualifierLoc().getBeginLoc();
1579 return MemberLoc;
1580 }
1581
1582 // FIXME: We don't want this to happen. Rather, we should be able to
1583 // detect all kinds of implicit accesses more cleanly.
1584 SourceLocation BaseStartLoc = getBase()->getBeginLoc();
1585 if (BaseStartLoc.isValid())
1586 return BaseStartLoc;
1587 return MemberLoc;
1588}
1589SourceLocation MemberExpr::getEndLoc() const {
1590 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1591 if (hasExplicitTemplateArgs())
1592 EndLoc = getRAngleLoc();
1593 else if (EndLoc.isInvalid())
1594 EndLoc = getBase()->getEndLoc();
1595 return EndLoc;
1596}
1597
1598bool CastExpr::CastConsistency() const {
1599 switch (getCastKind()) {
1600 case CK_DerivedToBase:
1601 case CK_UncheckedDerivedToBase:
1602 case CK_DerivedToBaseMemberPointer:
1603 case CK_BaseToDerived:
1604 case CK_BaseToDerivedMemberPointer:
1605 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1605, __PRETTY_FUNCTION__))
;
1606 break;
1607
1608 case CK_CPointerToObjCPointerCast:
1609 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1609, __PRETTY_FUNCTION__))
;
1610 assert(getSubExpr()->getType()->isPointerType())((getSubExpr()->getType()->isPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1610, __PRETTY_FUNCTION__))
;
1611 goto CheckNoBasePath;
1612
1613 case CK_BlockPointerToObjCPointerCast:
1614 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1614, __PRETTY_FUNCTION__))
;
1615 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1615, __PRETTY_FUNCTION__))
;
1616 goto CheckNoBasePath;
1617
1618 case CK_ReinterpretMemberPointer:
1619 assert(getType()->isMemberPointerType())((getType()->isMemberPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isMemberPointerType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1619, __PRETTY_FUNCTION__))
;
1620 assert(getSubExpr()->getType()->isMemberPointerType())((getSubExpr()->getType()->isMemberPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1620, __PRETTY_FUNCTION__))
;
1621 goto CheckNoBasePath;
1622
1623 case CK_BitCast:
1624 // Arbitrary casts to C pointer types count as bitcasts.
1625 // Otherwise, we should only have block and ObjC pointer casts
1626 // here if they stay within the type kind.
1627 if (!getType()->isPointerType()) {
1628 assert(getType()->isObjCObjectPointerType() ==((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1629, __PRETTY_FUNCTION__))
1629 getSubExpr()->getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1629, __PRETTY_FUNCTION__))
;
1630 assert(getType()->isBlockPointerType() ==((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1631, __PRETTY_FUNCTION__))
1631 getSubExpr()->getType()->isBlockPointerType())((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1631, __PRETTY_FUNCTION__))
;
1632 }
1633 goto CheckNoBasePath;
1634
1635 case CK_AnyPointerToBlockPointerCast:
1636 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1636, __PRETTY_FUNCTION__))
;
1637 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1638, __PRETTY_FUNCTION__))
1638 !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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1638, __PRETTY_FUNCTION__))
;
1639 goto CheckNoBasePath;
1640
1641 case CK_CopyAndAutoreleaseBlockObject:
1642 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1642, __PRETTY_FUNCTION__))
;
1643 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1643, __PRETTY_FUNCTION__))
;
1644 goto CheckNoBasePath;
1645
1646 case CK_FunctionToPointerDecay:
1647 assert(getType()->isPointerType())((getType()->isPointerType()) ? static_cast<void> (0
) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1647, __PRETTY_FUNCTION__))
;
1648 assert(getSubExpr()->getType()->isFunctionType())((getSubExpr()->getType()->isFunctionType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1648, __PRETTY_FUNCTION__))
;
1649 goto CheckNoBasePath;
1650
1651 case CK_AddressSpaceConversion: {
1652 auto Ty = getType();
1653 auto SETy = getSubExpr()->getType();
1654 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1654, __PRETTY_FUNCTION__))
;
1655 if (isRValue() && !Ty->isDependentType() && !SETy->isDependentType()) {
1656 Ty = Ty->getPointeeType();
1657 SETy = SETy->getPointeeType();
1658 }
1659 assert((Ty->isDependentType() || SETy->isDependentType()) ||(((Ty->isDependentType() || SETy->isDependentType()) ||
(!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace())) ? static_cast<void> (0) :
__assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1661, __PRETTY_FUNCTION__))
1660 (!Ty.isNull() && !SETy.isNull() &&(((Ty->isDependentType() || SETy->isDependentType()) ||
(!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace())) ? static_cast<void> (0) :
__assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1661, __PRETTY_FUNCTION__))
1661 Ty.getAddressSpace() != SETy.getAddressSpace()))(((Ty->isDependentType() || SETy->isDependentType()) ||
(!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace())) ? static_cast<void> (0) :
__assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1661, __PRETTY_FUNCTION__))
;
1662 goto CheckNoBasePath;
1663 }
1664 // These should not have an inheritance path.
1665 case CK_Dynamic:
1666 case CK_ToUnion:
1667 case CK_ArrayToPointerDecay:
1668 case CK_NullToMemberPointer:
1669 case CK_NullToPointer:
1670 case CK_ConstructorConversion:
1671 case CK_IntegralToPointer:
1672 case CK_PointerToIntegral:
1673 case CK_ToVoid:
1674 case CK_VectorSplat:
1675 case CK_IntegralCast:
1676 case CK_BooleanToSignedIntegral:
1677 case CK_IntegralToFloating:
1678 case CK_FloatingToIntegral:
1679 case CK_FloatingCast:
1680 case CK_ObjCObjectLValueCast:
1681 case CK_FloatingRealToComplex:
1682 case CK_FloatingComplexToReal:
1683 case CK_FloatingComplexCast:
1684 case CK_FloatingComplexToIntegralComplex:
1685 case CK_IntegralRealToComplex:
1686 case CK_IntegralComplexToReal:
1687 case CK_IntegralComplexCast:
1688 case CK_IntegralComplexToFloatingComplex:
1689 case CK_ARCProduceObject:
1690 case CK_ARCConsumeObject:
1691 case CK_ARCReclaimReturnedObject:
1692 case CK_ARCExtendBlockObject:
1693 case CK_ZeroToOCLOpaqueType:
1694 case CK_IntToOCLSampler:
1695 case CK_FloatingToFixedPoint:
1696 case CK_FixedPointToFloating:
1697 case CK_FixedPointCast:
1698 case CK_FixedPointToIntegral:
1699 case CK_IntegralToFixedPoint:
1700 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1700, __PRETTY_FUNCTION__))
;
1701 goto CheckNoBasePath;
1702
1703 case CK_Dependent:
1704 case CK_LValueToRValue:
1705 case CK_NoOp:
1706 case CK_AtomicToNonAtomic:
1707 case CK_NonAtomicToAtomic:
1708 case CK_PointerToBoolean:
1709 case CK_IntegralToBoolean:
1710 case CK_FloatingToBoolean:
1711 case CK_MemberPointerToBoolean:
1712 case CK_FloatingComplexToBoolean:
1713 case CK_IntegralComplexToBoolean:
1714 case CK_LValueBitCast: // -> bool&
1715 case CK_LValueToRValueBitCast:
1716 case CK_UserDefinedConversion: // operator bool()
1717 case CK_BuiltinFnToFnPtr:
1718 case CK_FixedPointToBoolean:
1719 CheckNoBasePath:
1720 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1720, __PRETTY_FUNCTION__))
;
1721 break;
1722 }
1723 return true;
1724}
1725
1726const char *CastExpr::getCastKindName(CastKind CK) {
1727 switch (CK) {
1728#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1729#include "clang/AST/OperationKinds.def"
1730 }
1731 llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1731)
;
1732}
1733
1734namespace {
1735 const Expr *skipImplicitTemporary(const Expr *E) {
1736 // Skip through reference binding to temporary.
1737 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1738 E = Materialize->getSubExpr();
1739
1740 // Skip any temporary bindings; they're implicit.
1741 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1742 E = Binder->getSubExpr();
1743
1744 return E;
1745 }
1746}
1747
1748Expr *CastExpr::getSubExprAsWritten() {
1749 const Expr *SubExpr = nullptr;
1750 const CastExpr *E = this;
1751 do {
1752 SubExpr = skipImplicitTemporary(E->getSubExpr());
1753
1754 // Conversions by constructor and conversion functions have a
1755 // subexpression describing the call; strip it off.
1756 if (E->getCastKind() == CK_ConstructorConversion)
1757 SubExpr =
1758 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
1759 else if (E->getCastKind() == CK_UserDefinedConversion) {
1760 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1762, __PRETTY_FUNCTION__))
1761 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1762, __PRETTY_FUNCTION__))
1762 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1762, __PRETTY_FUNCTION__))
;
1763 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1764 SubExpr = MCE->getImplicitObjectArgument();
1765 }
1766
1767 // If the subexpression we're left with is an implicit cast, look
1768 // through that, too.
1769 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1770
1771 return const_cast<Expr*>(SubExpr);
1772}
1773
1774NamedDecl *CastExpr::getConversionFunction() const {
1775 const Expr *SubExpr = nullptr;
1776
1777 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1778 SubExpr = skipImplicitTemporary(E->getSubExpr());
1779
1780 if (E->getCastKind() == CK_ConstructorConversion)
1781 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1782
1783 if (E->getCastKind() == CK_UserDefinedConversion) {
1784 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1785 return MCE->getMethodDecl();
1786 }
1787 }
1788
1789 return nullptr;
1790}
1791
1792CXXBaseSpecifier **CastExpr::path_buffer() {
1793 switch (getStmtClass()) {
1794#define ABSTRACT_STMT(x)
1795#define CASTEXPR(Type, Base) \
1796 case Stmt::Type##Class: \
1797 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1798#define STMT(Type, Base)
1799#include "clang/AST/StmtNodes.inc"
1800 default:
1801 llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1801)
;
1802 }
1803}
1804
1805const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1806 QualType opType) {
1807 auto RD = unionType->castAs<RecordType>()->getDecl();
1808 return getTargetFieldForToUnionCast(RD, opType);
1809}
1810
1811const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1812 QualType OpType) {
1813 auto &Ctx = RD->getASTContext();
1814 RecordDecl::field_iterator Field, FieldEnd;
1815 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1816 Field != FieldEnd; ++Field) {
1817 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1818 !Field->isUnnamedBitfield()) {
1819 return *Field;
1820 }
1821 }
1822 return nullptr;
1823}
1824
1825FPOptionsOverride *CastExpr::getTrailingFPFeatures() {
1826 assert(hasStoredFPFeatures())((hasStoredFPFeatures()) ? static_cast<void> (0) : __assert_fail
("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1826, __PRETTY_FUNCTION__))
;
1827 switch (getStmtClass()) {
1828 case ImplicitCastExprClass:
1829 return static_cast<ImplicitCastExpr *>(this)
1830 ->getTrailingObjects<FPOptionsOverride>();
1831 case CStyleCastExprClass:
1832 return static_cast<CStyleCastExpr *>(this)
1833 ->getTrailingObjects<FPOptionsOverride>();
1834 case CXXFunctionalCastExprClass:
1835 return static_cast<CXXFunctionalCastExpr *>(this)
1836 ->getTrailingObjects<FPOptionsOverride>();
1837 case CXXStaticCastExprClass:
1838 return static_cast<CXXStaticCastExpr *>(this)
1839 ->getTrailingObjects<FPOptionsOverride>();
1840 default:
1841 llvm_unreachable("Cast does not have FPFeatures")::llvm::llvm_unreachable_internal("Cast does not have FPFeatures"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1841)
;
1842 }
1843}
1844
1845ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1846 CastKind Kind, Expr *Operand,
1847 const CXXCastPath *BasePath,
1848 ExprValueKind VK,
1849 FPOptionsOverride FPO) {
1850 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1851 void *Buffer =
1852 C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
1853 PathSize, FPO.requiresTrailingStorage()));
1854 // Per C++ [conv.lval]p3, lvalue-to-rvalue conversions on class and
1855 // std::nullptr_t have special semantics not captured by CK_LValueToRValue.
1856 assert((Kind != CK_LValueToRValue ||(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1858, __PRETTY_FUNCTION__))
1857 !(T->isNullPtrType() || T->getAsCXXRecordDecl())) &&(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1858, __PRETTY_FUNCTION__))
1858 "invalid type for lvalue-to-rvalue conversion")(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1858, __PRETTY_FUNCTION__))
;
1859 ImplicitCastExpr *E =
1860 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, FPO, VK);
1861 if (PathSize)
1862 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1863 E->getTrailingObjects<CXXBaseSpecifier *>());
1864 return E;
1865}
1866
1867ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1868 unsigned PathSize,
1869 bool HasFPFeatures) {
1870 void *Buffer =
1871 C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
1872 PathSize, HasFPFeatures));
1873 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize, HasFPFeatures);
1874}
1875
1876CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1877 ExprValueKind VK, CastKind K, Expr *Op,
1878 const CXXCastPath *BasePath,
1879 FPOptionsOverride FPO,
1880 TypeSourceInfo *WrittenTy,
1881 SourceLocation L, SourceLocation R) {
1882 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1883 void *Buffer =
1884 C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
1885 PathSize, FPO.requiresTrailingStorage()));
1886 CStyleCastExpr *E =
1887 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, FPO, WrittenTy, L, R);
1888 if (PathSize)
1889 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1890 E->getTrailingObjects<CXXBaseSpecifier *>());
1891 return E;
1892}
1893
1894CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1895 unsigned PathSize,
1896 bool HasFPFeatures) {
1897 void *Buffer =
1898 C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
1899 PathSize, HasFPFeatures));
1900 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize, HasFPFeatures);
1901}
1902
1903/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1904/// corresponds to, e.g. "<<=".
1905StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1906 switch (Op) {
1907#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1908#include "clang/AST/OperationKinds.def"
1909 }
1910 llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1910)
;
1911}
1912
1913BinaryOperatorKind
1914BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1915 switch (OO) {
1916 default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 1916)
;
1917 case OO_Plus: return BO_Add;
1918 case OO_Minus: return BO_Sub;
1919 case OO_Star: return BO_Mul;
1920 case OO_Slash: return BO_Div;
1921 case OO_Percent: return BO_Rem;
1922 case OO_Caret: return BO_Xor;
1923 case OO_Amp: return BO_And;
1924 case OO_Pipe: return BO_Or;
1925 case OO_Equal: return BO_Assign;
1926 case OO_Spaceship: return BO_Cmp;
1927 case OO_Less: return BO_LT;
1928 case OO_Greater: return BO_GT;
1929 case OO_PlusEqual: return BO_AddAssign;
1930 case OO_MinusEqual: return BO_SubAssign;
1931 case OO_StarEqual: return BO_MulAssign;
1932 case OO_SlashEqual: return BO_DivAssign;
1933 case OO_PercentEqual: return BO_RemAssign;
1934 case OO_CaretEqual: return BO_XorAssign;
1935 case OO_AmpEqual: return BO_AndAssign;
1936 case OO_PipeEqual: return BO_OrAssign;
1937 case OO_LessLess: return BO_Shl;
1938 case OO_GreaterGreater: return BO_Shr;
1939 case OO_LessLessEqual: return BO_ShlAssign;
1940 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1941 case OO_EqualEqual: return BO_EQ;
1942 case OO_ExclaimEqual: return BO_NE;
1943 case OO_LessEqual: return BO_LE;
1944 case OO_GreaterEqual: return BO_GE;
1945 case OO_AmpAmp: return BO_LAnd;
1946 case OO_PipePipe: return BO_LOr;
1947 case OO_Comma: return BO_Comma;
1948 case OO_ArrowStar: return BO_PtrMemI;
1949 }
1950}
1951
1952OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1953 static const OverloadedOperatorKind OverOps[] = {
1954 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1955 OO_Star, OO_Slash, OO_Percent,
1956 OO_Plus, OO_Minus,
1957 OO_LessLess, OO_GreaterGreater,
1958 OO_Spaceship,
1959 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1960 OO_EqualEqual, OO_ExclaimEqual,
1961 OO_Amp,
1962 OO_Caret,
1963 OO_Pipe,
1964 OO_AmpAmp,
1965 OO_PipePipe,
1966 OO_Equal, OO_StarEqual,
1967 OO_SlashEqual, OO_PercentEqual,
1968 OO_PlusEqual, OO_MinusEqual,
1969 OO_LessLessEqual, OO_GreaterGreaterEqual,
1970 OO_AmpEqual, OO_CaretEqual,
1971 OO_PipeEqual,
1972 OO_Comma
1973 };
1974 return OverOps[Opc];
1975}
1976
1977bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
1978 Opcode Opc,
1979 Expr *LHS, Expr *RHS) {
1980 if (Opc != BO_Add)
1981 return false;
1982
1983 // Check that we have one pointer and one integer operand.
1984 Expr *PExp;
1985 if (LHS->getType()->isPointerType()) {
1986 if (!RHS->getType()->isIntegerType())
1987 return false;
1988 PExp = LHS;
1989 } else if (RHS->getType()->isPointerType()) {
1990 if (!LHS->getType()->isIntegerType())
1991 return false;
1992 PExp = RHS;
1993 } else {
1994 return false;
1995 }
1996
1997 // Check that the pointer is a nullptr.
1998 if (!PExp->IgnoreParenCasts()
1999 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
2000 return false;
2001
2002 // Check that the pointee type is char-sized.
2003 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
2004 if (!PTy || !PTy->getPointeeType()->isCharType())
2005 return false;
2006
2007 return true;
2008}
2009
2010static QualType getDecayedSourceLocExprType(const ASTContext &Ctx,
2011 SourceLocExpr::IdentKind Kind) {
2012 switch (Kind) {
2013 case SourceLocExpr::File:
2014 case SourceLocExpr::Function: {
2015 QualType ArrTy = Ctx.getStringLiteralArrayType(Ctx.CharTy, 0);
2016 return Ctx.getPointerType(ArrTy->getAsArrayTypeUnsafe()->getElementType());
2017 }
2018 case SourceLocExpr::Line:
2019 case SourceLocExpr::Column:
2020 return Ctx.UnsignedIntTy;
2021 }
2022 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2022)
;
2023}
2024
2025SourceLocExpr::SourceLocExpr(const ASTContext &Ctx, IdentKind Kind,
2026 SourceLocation BLoc, SourceLocation RParenLoc,
2027 DeclContext *ParentContext)
2028 : Expr(SourceLocExprClass, getDecayedSourceLocExprType(Ctx, Kind),
2029 VK_RValue, OK_Ordinary),
2030 BuiltinLoc(BLoc), RParenLoc(RParenLoc), ParentContext(ParentContext) {
2031 SourceLocExprBits.Kind = Kind;
2032 setDependence(ExprDependence::None);
2033}
2034
2035StringRef SourceLocExpr::getBuiltinStr() const {
2036 switch (getIdentKind()) {
2037 case File:
2038 return "__builtin_FILE";
2039 case Function:
2040 return "__builtin_FUNCTION";
2041 case Line:
2042 return "__builtin_LINE";
2043 case Column:
2044 return "__builtin_COLUMN";
2045 }
2046 llvm_unreachable("unexpected IdentKind!")::llvm::llvm_unreachable_internal("unexpected IdentKind!", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2046)
;
2047}
2048
2049APValue SourceLocExpr::EvaluateInContext(const ASTContext &Ctx,
2050 const Expr *DefaultExpr) const {
2051 SourceLocation Loc;
2052 const DeclContext *Context;
2053
2054 std::tie(Loc,
2055 Context) = [&]() -> std::pair<SourceLocation, const DeclContext *> {
2056 if (auto *DIE = dyn_cast_or_null<CXXDefaultInitExpr>(DefaultExpr))
2057 return {DIE->getUsedLocation(), DIE->getUsedContext()};
2058 if (auto *DAE = dyn_cast_or_null<CXXDefaultArgExpr>(DefaultExpr))
2059 return {DAE->getUsedLocation(), DAE->getUsedContext()};
2060 return {this->getLocation(), this->getParentContext()};
2061 }();
2062
2063 PresumedLoc PLoc = Ctx.getSourceManager().getPresumedLoc(
2064 Ctx.getSourceManager().getExpansionRange(Loc).getEnd());
2065
2066 auto MakeStringLiteral = [&](StringRef Tmp) {
2067 using LValuePathEntry = APValue::LValuePathEntry;
2068 StringLiteral *Res = Ctx.getPredefinedStringLiteralFromCache(Tmp);
2069 // Decay the string to a pointer to the first character.
2070 LValuePathEntry Path[1] = {LValuePathEntry::ArrayIndex(0)};
2071 return APValue(Res, CharUnits::Zero(), Path, /*OnePastTheEnd=*/false);
2072 };
2073
2074 switch (getIdentKind()) {
2075 case SourceLocExpr::File:
2076 return MakeStringLiteral(PLoc.getFilename());
2077 case SourceLocExpr::Function: {
2078 const Decl *CurDecl = dyn_cast_or_null<Decl>(Context);
2079 return MakeStringLiteral(
2080 CurDecl ? PredefinedExpr::ComputeName(PredefinedExpr::Function, CurDecl)
2081 : std::string(""));
2082 }
2083 case SourceLocExpr::Line:
2084 case SourceLocExpr::Column: {
2085 llvm::APSInt IntVal(Ctx.getIntWidth(Ctx.UnsignedIntTy),
2086 /*isUnsigned=*/true);
2087 IntVal = getIdentKind() == SourceLocExpr::Line ? PLoc.getLine()
2088 : PLoc.getColumn();
2089 return APValue(IntVal);
2090 }
2091 }
2092 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2092)
;
2093}
2094
2095InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
2096 ArrayRef<Expr *> initExprs, SourceLocation rbraceloc)
2097 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary),
2098 InitExprs(C, initExprs.size()), LBraceLoc(lbraceloc),
2099 RBraceLoc(rbraceloc), AltForm(nullptr, true) {
2100 sawArrayRangeDesignator(false);
2101 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
2102
2103 setDependence(computeDependence(this));
2104}
2105
2106void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
2107 if (NumInits > InitExprs.size())
2108 InitExprs.reserve(C, NumInits);
2109}
2110
2111void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
2112 InitExprs.resize(C, NumInits, nullptr);
2113}
2114
2115Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
2116 if (Init >= InitExprs.size()) {
2117 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
2118 setInit(Init, expr);
2119 return nullptr;
2120 }
2121
2122 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
2123 setInit(Init, expr);
2124 return Result;
2125}
2126
2127void InitListExpr::setArrayFiller(Expr *filler) {
2128 assert(!hasArrayFiller() && "Filler already set!")((!hasArrayFiller() && "Filler already set!") ? static_cast
<void> (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2128, __PRETTY_FUNCTION__))
;
2129 ArrayFillerOrUnionFieldInit = filler;
2130 // Fill out any "holes" in the array due to designated initializers.
2131 Expr **inits = getInits();
2132 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
2133 if (inits[i] == nullptr)
2134 inits[i] = filler;
2135}
2136
2137bool InitListExpr::isStringLiteralInit() const {
2138 if (getNumInits() != 1)
2139 return false;
2140 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
2141 if (!AT || !AT->getElementType()->isIntegerType())
2142 return false;
2143 // It is possible for getInit() to return null.
2144 const Expr *Init = getInit(0);
2145 if (!Init)
2146 return false;
2147 Init = Init->IgnoreParens();
2148 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2149}
2150
2151bool InitListExpr::isTransparent() const {
2152 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2152, __PRETTY_FUNCTION__))
;
2153
2154 // A glvalue InitListExpr is always just sugar.
2155 if (isGLValue()) {
2156 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2156, __PRETTY_FUNCTION__))
;
2157 return true;
2158 }
2159
2160 // Otherwise, we're sugar if and only if we have exactly one initializer that
2161 // is of the same type.
2162 if (getNumInits() != 1 || !getInit(0))
2163 return false;
2164
2165 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2166 // transparent struct copy.
2167 if (!getInit(0)->isRValue() && getType()->isRecordType())
2168 return false;
2169
2170 return getType().getCanonicalType() ==
2171 getInit(0)->getType().getCanonicalType();
2172}
2173
2174bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2175 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2175, __PRETTY_FUNCTION__))
;
2176
2177 if (LangOpts.CPlusPlus || getNumInits() != 1 || !getInit(0)) {
2178 return false;
2179 }
2180
2181 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0)->IgnoreImplicit());
2182 return Lit && Lit->getValue() == 0;
2183}
2184
2185SourceLocation InitListExpr::getBeginLoc() const {
2186 if (InitListExpr *SyntacticForm = getSyntacticForm())
2187 return SyntacticForm->getBeginLoc();
2188 SourceLocation Beg = LBraceLoc;
2189 if (Beg.isInvalid()) {
2190 // Find the first non-null initializer.
2191 for (InitExprsTy::const_iterator I = InitExprs.begin(),
2192 E = InitExprs.end();
2193 I != E; ++I) {
2194 if (Stmt *S = *I) {
2195 Beg = S->getBeginLoc();
2196 break;
2197 }
2198 }
2199 }
2200 return Beg;
2201}
2202
2203SourceLocation InitListExpr::getEndLoc() const {
2204 if (InitListExpr *SyntacticForm = getSyntacticForm())
2205 return SyntacticForm->getEndLoc();
2206 SourceLocation End = RBraceLoc;
2207 if (End.isInvalid()) {
2208 // Find the first non-null initializer from the end.
2209 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2210 E = InitExprs.rend();
2211 I != E; ++I) {
2212 if (Stmt *S = *I) {
2213 End = S->getEndLoc();
2214 break;
2215 }
2216 }
2217 }
2218 return End;
2219}
2220
2221/// getFunctionType - Return the underlying function type for this block.
2222///
2223const FunctionProtoType *BlockExpr::getFunctionType() const {
2224 // The block pointer is never sugared, but the function type might be.
2225 return cast<BlockPointerType>(getType())
2226 ->getPointeeType()->castAs<FunctionProtoType>();
2227}
2228
2229SourceLocation BlockExpr::getCaretLocation() const {
2230 return TheBlock->getCaretLocation();
2231}
2232const Stmt *BlockExpr::getBody() const {
2233 return TheBlock->getBody();
2234}
2235Stmt *BlockExpr::getBody() {
2236 return TheBlock->getBody();
2237}
2238
2239
2240//===----------------------------------------------------------------------===//
2241// Generic Expression Routines
2242//===----------------------------------------------------------------------===//
2243
2244bool Expr::isReadIfDiscardedInCPlusPlus11() const {
2245 // In C++11, discarded-value expressions of a certain form are special,
2246 // according to [expr]p10:
2247 // The lvalue-to-rvalue conversion (4.1) is applied only if the
2248 // expression is an lvalue of volatile-qualified type and it has
2249 // one of the following forms:
2250 if (!isGLValue() || !getType().isVolatileQualified())
2251 return false;
2252
2253 const Expr *E = IgnoreParens();
2254
2255 // - id-expression (5.1.1),
2256 if (isa<DeclRefExpr>(E))
2257 return true;
2258
2259 // - subscripting (5.2.1),
2260 if (isa<ArraySubscriptExpr>(E))
2261 return true;
2262
2263 // - class member access (5.2.5),
2264 if (isa<MemberExpr>(E))
2265 return true;
2266
2267 // - indirection (5.3.1),
2268 if (auto *UO = dyn_cast<UnaryOperator>(E))
2269 if (UO->getOpcode() == UO_Deref)
2270 return true;
2271
2272 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
2273 // - pointer-to-member operation (5.5),
2274 if (BO->isPtrMemOp())
2275 return true;
2276
2277 // - comma expression (5.18) where the right operand is one of the above.
2278 if (BO->getOpcode() == BO_Comma)
2279 return BO->getRHS()->isReadIfDiscardedInCPlusPlus11();
2280 }
2281
2282 // - conditional expression (5.16) where both the second and the third
2283 // operands are one of the above, or
2284 if (auto *CO = dyn_cast<ConditionalOperator>(E))
2285 return CO->getTrueExpr()->isReadIfDiscardedInCPlusPlus11() &&
2286 CO->getFalseExpr()->isReadIfDiscardedInCPlusPlus11();
2287 // The related edge case of "*x ?: *x".
2288 if (auto *BCO =
2289 dyn_cast<BinaryConditionalOperator>(E)) {
2290 if (auto *OVE = dyn_cast<OpaqueValueExpr>(BCO->getTrueExpr()))
2291 return OVE->getSourceExpr()->isReadIfDiscardedInCPlusPlus11() &&
2292 BCO->getFalseExpr()->isReadIfDiscardedInCPlusPlus11();
2293 }
2294
2295 // Objective-C++ extensions to the rule.
2296 if (isa<PseudoObjectExpr>(E) || isa<ObjCIvarRefExpr>(E))
2297 return true;
2298
2299 return false;
2300}
2301
2302/// isUnusedResultAWarning - Return true if this immediate expression should
2303/// be warned about if the result is unused. If so, fill in Loc and Ranges
2304/// with location to warn on and the source range[s] to report with the
2305/// warning.
2306bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2307 SourceRange &R1, SourceRange &R2,
2308 ASTContext &Ctx) const {
2309 // Don't warn if the expr is type dependent. The type could end up
2310 // instantiating to void.
2311 if (isTypeDependent())
2312 return false;
2313
2314 switch (getStmtClass()) {
2315 default:
2316 if (getType()->isVoidType())
2317 return false;
2318 WarnE = this;
2319 Loc = getExprLoc();
2320 R1 = getSourceRange();
2321 return true;
2322 case ParenExprClass:
2323 return cast<ParenExpr>(this)->getSubExpr()->
2324 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2325 case GenericSelectionExprClass:
2326 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2327 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2328 case CoawaitExprClass:
2329 case CoyieldExprClass:
2330 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
2331 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2332 case ChooseExprClass:
2333 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2334 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2335 case UnaryOperatorClass: {
2336 const UnaryOperator *UO = cast<UnaryOperator>(this);
2337
2338 switch (UO->getOpcode()) {
2339 case UO_Plus:
2340 case UO_Minus:
2341 case UO_AddrOf:
2342 case UO_Not:
2343 case UO_LNot:
2344 case UO_Deref:
2345 break;
2346 case UO_Coawait:
2347 // This is just the 'operator co_await' call inside the guts of a
2348 // dependent co_await call.
2349 case UO_PostInc:
2350 case UO_PostDec:
2351 case UO_PreInc:
2352 case UO_PreDec: // ++/--
2353 return false; // Not a warning.
2354 case UO_Real:
2355 case UO_Imag:
2356 // accessing a piece of a volatile complex is a side-effect.
2357 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2358 .isVolatileQualified())
2359 return false;
2360 break;
2361 case UO_Extension:
2362 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2363 }
2364 WarnE = this;
2365 Loc = UO->getOperatorLoc();
2366 R1 = UO->getSubExpr()->getSourceRange();
2367 return true;
2368 }
2369 case BinaryOperatorClass: {
2370 const BinaryOperator *BO = cast<BinaryOperator>(this);
2371 switch (BO->getOpcode()) {
2372 default:
2373 break;
2374 // Consider the RHS of comma for side effects. LHS was checked by
2375 // Sema::CheckCommaOperands.
2376 case BO_Comma:
2377 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2378 // lvalue-ness) of an assignment written in a macro.
2379 if (IntegerLiteral *IE =
2380 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2381 if (IE->getValue() == 0)
2382 return false;
2383 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2384 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2385 case BO_LAnd:
2386 case BO_LOr:
2387 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2388 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2389 return false;
2390 break;
2391 }
2392 if (BO->isAssignmentOp())
2393 return false;
2394 WarnE = this;
2395 Loc = BO->getOperatorLoc();
2396 R1 = BO->getLHS()->getSourceRange();
2397 R2 = BO->getRHS()->getSourceRange();
2398 return true;
2399 }
2400 case CompoundAssignOperatorClass:
2401 case VAArgExprClass:
2402 case AtomicExprClass:
2403 return false;
2404
2405 case ConditionalOperatorClass: {
2406 // If only one of the LHS or RHS is a warning, the operator might
2407 // be being used for control flow. Only warn if both the LHS and
2408 // RHS are warnings.
2409 const auto *Exp = cast<ConditionalOperator>(this);
2410 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) &&
2411 Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2412 }
2413 case BinaryConditionalOperatorClass: {
2414 const auto *Exp = cast<BinaryConditionalOperator>(this);
2415 return Exp->getFalseExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2416 }
2417
2418 case MemberExprClass:
2419 WarnE = this;
2420 Loc = cast<MemberExpr>(this)->getMemberLoc();
2421 R1 = SourceRange(Loc, Loc);
2422 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2423 return true;
2424
2425 case ArraySubscriptExprClass:
2426 WarnE = this;
2427 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2428 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2429 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2430 return true;
2431
2432 case CXXOperatorCallExprClass: {
2433 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2434 // overloads as there is no reasonable way to define these such that they
2435 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2436 // warning: operators == and != are commonly typo'ed, and so warning on them
2437 // provides additional value as well. If this list is updated,
2438 // DiagnoseUnusedComparison should be as well.
2439 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2440 switch (Op->getOperator()) {
2441 default:
2442 break;
2443 case OO_EqualEqual:
2444 case OO_ExclaimEqual:
2445 case OO_Less:
2446 case OO_Greater:
2447 case OO_GreaterEqual:
2448 case OO_LessEqual:
2449 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2450 Op->getCallReturnType(Ctx)->isVoidType())
2451 break;
2452 WarnE = this;
2453 Loc = Op->getOperatorLoc();
2454 R1 = Op->getSourceRange();
2455 return true;
2456 }
2457
2458 // Fallthrough for generic call handling.
2459 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2460 }
2461 case CallExprClass:
2462 case CXXMemberCallExprClass:
2463 case UserDefinedLiteralClass: {
2464 // If this is a direct call, get the callee.
2465 const CallExpr *CE = cast<CallExpr>(this);
2466 if (const Decl *FD = CE->getCalleeDecl()) {
2467 // If the callee has attribute pure, const, or warn_unused_result, warn
2468 // about it. void foo() { strlen("bar"); } should warn.
2469 //
2470 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2471 // updated to match for QoI.
2472 if (CE->hasUnusedResultAttr(Ctx) ||
2473 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2474 WarnE = this;
2475 Loc = CE->getCallee()->getBeginLoc();
2476 R1 = CE->getCallee()->getSourceRange();
2477
2478 if (unsigned NumArgs = CE->getNumArgs())
2479 R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
2480 CE->getArg(NumArgs - 1)->getEndLoc());
2481 return true;
2482 }
2483 }
2484 return false;
2485 }
2486
2487 // If we don't know precisely what we're looking at, let's not warn.
2488 case UnresolvedLookupExprClass:
2489 case CXXUnresolvedConstructExprClass:
2490 case RecoveryExprClass:
2491 return false;
2492
2493 case CXXTemporaryObjectExprClass:
2494 case CXXConstructExprClass: {
2495 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2496 const auto *WarnURAttr = Type->getAttr<WarnUnusedResultAttr>();
2497 if (Type->hasAttr<WarnUnusedAttr>() ||
2498 (WarnURAttr && WarnURAttr->IsCXX11NoDiscard())) {
2499 WarnE = this;
2500 Loc = getBeginLoc();
2501 R1 = getSourceRange();
2502 return true;
2503 }
2504 }
2505
2506 const auto *CE = cast<CXXConstructExpr>(this);
2507 if (const CXXConstructorDecl *Ctor = CE->getConstructor()) {
2508 const auto *WarnURAttr = Ctor->getAttr<WarnUnusedResultAttr>();
2509 if (WarnURAttr && WarnURAttr->IsCXX11NoDiscard()) {
2510 WarnE = this;
2511 Loc = getBeginLoc();
2512 R1 = getSourceRange();
2513
2514 if (unsigned NumArgs = CE->getNumArgs())
2515 R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
2516 CE->getArg(NumArgs - 1)->getEndLoc());
2517 return true;
2518 }
2519 }
2520
2521 return false;
2522 }
2523
2524 case ObjCMessageExprClass: {
2525 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2526 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2527 ME->isInstanceMessage() &&
2528 !ME->getType()->isVoidType() &&
2529 ME->getMethodFamily() == OMF_init) {
2530 WarnE = this;
2531 Loc = getExprLoc();
2532 R1 = ME->getSourceRange();
2533 return true;
2534 }
2535
2536 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2537 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2538 WarnE = this;
2539 Loc = getExprLoc();
2540 return true;
2541 }
2542
2543 return false;
2544 }
2545
2546 case ObjCPropertyRefExprClass:
2547 WarnE = this;
2548 Loc = getExprLoc();
2549 R1 = getSourceRange();
2550 return true;
2551
2552 case PseudoObjectExprClass: {
2553 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2554
2555 // Only complain about things that have the form of a getter.
2556 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2557 isa<BinaryOperator>(PO->getSyntacticForm()))
2558 return false;
2559
2560 WarnE = this;
2561 Loc = getExprLoc();
2562 R1 = getSourceRange();
2563 return true;
2564 }
2565
2566 case StmtExprClass: {
2567 // Statement exprs don't logically have side effects themselves, but are
2568 // sometimes used in macros in ways that give them a type that is unused.
2569 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2570 // however, if the result of the stmt expr is dead, we don't want to emit a
2571 // warning.
2572 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2573 if (!CS->body_empty()) {
2574 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2575 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2576 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2577 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2578 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2579 }
2580
2581 if (getType()->isVoidType())
2582 return false;
2583 WarnE = this;
2584 Loc = cast<StmtExpr>(this)->getLParenLoc();
2585 R1 = getSourceRange();
2586 return true;
2587 }
2588 case CXXFunctionalCastExprClass:
2589 case CStyleCastExprClass: {
2590 // Ignore an explicit cast to void, except in C++98 if the operand is a
2591 // volatile glvalue for which we would trigger an implicit read in any
2592 // other language mode. (Such an implicit read always happens as part of
2593 // the lvalue conversion in C, and happens in C++ for expressions of all
2594 // forms where it seems likely the user intended to trigger a volatile
2595 // load.)
2596 const CastExpr *CE = cast<CastExpr>(this);
2597 const Expr *SubE = CE->getSubExpr()->IgnoreParens();
2598 if (CE->getCastKind() == CK_ToVoid) {
2599 if (Ctx.getLangOpts().CPlusPlus && !Ctx.getLangOpts().CPlusPlus11 &&
2600 SubE->isReadIfDiscardedInCPlusPlus11()) {
2601 // Suppress the "unused value" warning for idiomatic usage of
2602 // '(void)var;' used to suppress "unused variable" warnings.
2603 if (auto *DRE = dyn_cast<DeclRefExpr>(SubE))
2604 if (auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
2605 if (!VD->isExternallyVisible())
2606 return false;
2607
2608 // The lvalue-to-rvalue conversion would have no effect for an array.
2609 // It's implausible that the programmer expected this to result in a
2610 // volatile array load, so don't warn.
2611 if (SubE->getType()->isArrayType())
2612 return false;
2613
2614 return SubE->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2615 }
2616 return false;
2617 }
2618
2619 // If this is a cast to a constructor conversion, check the operand.
2620 // Otherwise, the result of the cast is unused.
2621 if (CE->getCastKind() == CK_ConstructorConversion)
2622 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2623 if (CE->getCastKind() == CK_Dependent)
2624 return false;
2625
2626 WarnE = this;
2627 if (const CXXFunctionalCastExpr *CXXCE =
2628 dyn_cast<CXXFunctionalCastExpr>(this)) {
2629 Loc = CXXCE->getBeginLoc();
2630 R1 = CXXCE->getSubExpr()->getSourceRange();
2631 } else {
2632 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2633 Loc = CStyleCE->getLParenLoc();
2634 R1 = CStyleCE->getSubExpr()->getSourceRange();
2635 }
2636 return true;
2637 }
2638 case ImplicitCastExprClass: {
2639 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2640
2641 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2642 if (ICE->getCastKind() == CK_LValueToRValue &&
2643 ICE->getSubExpr()->getType().isVolatileQualified())
2644 return false;
2645
2646 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2647 }
2648 case CXXDefaultArgExprClass:
2649 return (cast<CXXDefaultArgExpr>(this)
2650 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2651 case CXXDefaultInitExprClass:
2652 return (cast<CXXDefaultInitExpr>(this)
2653 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2654
2655 case CXXNewExprClass:
2656 // FIXME: In theory, there might be new expressions that don't have side
2657 // effects (e.g. a placement new with an uninitialized POD).
2658 case CXXDeleteExprClass:
2659 return false;
2660 case MaterializeTemporaryExprClass:
2661 return cast<MaterializeTemporaryExpr>(this)
2662 ->getSubExpr()
2663 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2664 case CXXBindTemporaryExprClass:
2665 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2666 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2667 case ExprWithCleanupsClass:
2668 return cast<ExprWithCleanups>(this)->getSubExpr()
2669 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2670 }
2671}
2672
2673/// isOBJCGCCandidate - Check if an expression is objc gc'able.
2674/// returns true, if it is; false otherwise.
2675bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2676 const Expr *E = IgnoreParens();
2677 switch (E->getStmtClass()) {
2678 default:
2679 return false;
2680 case ObjCIvarRefExprClass:
2681 return true;
2682 case Expr::UnaryOperatorClass:
2683 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2684 case ImplicitCastExprClass:
2685 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2686 case MaterializeTemporaryExprClass:
2687 return cast<MaterializeTemporaryExpr>(E)->getSubExpr()->isOBJCGCCandidate(
2688 Ctx);
2689 case CStyleCastExprClass:
2690 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2691 case DeclRefExprClass: {
2692 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2693
2694 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2695 if (VD->hasGlobalStorage())
2696 return true;
2697 QualType T = VD->getType();
2698 // dereferencing to a pointer is always a gc'able candidate,
2699 // unless it is __weak.
2700 return T->isPointerType() &&
2701 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2702 }
2703 return false;
2704 }
2705 case MemberExprClass: {
2706 const MemberExpr *M = cast<MemberExpr>(E);
2707 return M->getBase()->isOBJCGCCandidate(Ctx);
2708 }
2709 case ArraySubscriptExprClass:
2710 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2711 }
2712}
2713
2714bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2715 if (isTypeDependent())
2716 return false;
2717 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2718}
2719
2720QualType Expr::findBoundMemberType(const Expr *expr) {
2721 assert(expr->hasPlaceholderType(BuiltinType::BoundMember))((expr->hasPlaceholderType(BuiltinType::BoundMember)) ? static_cast
<void> (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2721, __PRETTY_FUNCTION__))
;
2722
2723 // Bound member expressions are always one of these possibilities:
2724 // x->m x.m x->*y x.*y
2725 // (possibly parenthesized)
2726
2727 expr = expr->IgnoreParens();
2728 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2729 assert(isa<CXXMethodDecl>(mem->getMemberDecl()))((isa<CXXMethodDecl>(mem->getMemberDecl())) ? static_cast
<void> (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2729, __PRETTY_FUNCTION__))
;
2730 return mem->getMemberDecl()->getType();
2731 }
2732
2733 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2734 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2735 ->getPointeeType();
2736 assert(type->isFunctionType())((type->isFunctionType()) ? static_cast<void> (0) : __assert_fail
("type->isFunctionType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2736, __PRETTY_FUNCTION__))
;
2737 return type;
2738 }
2739
2740 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2740, __PRETTY_FUNCTION__))
;
2741 return QualType();
2742}
2743
2744Expr *Expr::IgnoreImpCasts() {
2745 return IgnoreExprNodes(this, IgnoreImplicitCastsSingleStep);
2746}
2747
2748Expr *Expr::IgnoreCasts() {
2749 return IgnoreExprNodes(this, IgnoreCastsSingleStep);
2750}
2751
2752Expr *Expr::IgnoreImplicit() {
2753 return IgnoreExprNodes(this, IgnoreImplicitSingleStep);
2754}
2755
2756Expr *Expr::IgnoreImplicitAsWritten() {
2757 return IgnoreExprNodes(this, IgnoreImplicitAsWrittenSingleStep);
2758}
2759
2760Expr *Expr::IgnoreParens() {
2761 return IgnoreExprNodes(this, IgnoreParensSingleStep);
2762}
2763
2764Expr *Expr::IgnoreParenImpCasts() {
2765 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2766 IgnoreImplicitCastsExtraSingleStep);
2767}
2768
2769Expr *Expr::IgnoreParenCasts() {
2770 return IgnoreExprNodes(this, IgnoreParensSingleStep, IgnoreCastsSingleStep);
2771}
2772
2773Expr *Expr::IgnoreConversionOperatorSingleStep() {
2774 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2775 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2776 return MCE->getImplicitObjectArgument();
2777 }
2778 return this;
2779}
2780
2781Expr *Expr::IgnoreParenLValueCasts() {
2782 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2783 IgnoreLValueCastsSingleStep);
2784}
2785
2786Expr *Expr::IgnoreParenBaseCasts() {
2787 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2788 IgnoreBaseCastsSingleStep);
2789}
2790
2791Expr *Expr::IgnoreParenNoopCasts(const ASTContext &Ctx) {
2792 auto IgnoreNoopCastsSingleStep = [&Ctx](Expr *E) {
2793 if (auto *CE = dyn_cast<CastExpr>(E)) {
2794 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2795 // ptr<->int casts of the same width. We also ignore all identity casts.
2796 Expr *SubExpr = CE->getSubExpr();
2797 bool IsIdentityCast =
2798 Ctx.hasSameUnqualifiedType(E->getType(), SubExpr->getType());
2799 bool IsSameWidthCast = (E->getType()->isPointerType() ||
2800 E->getType()->isIntegralType(Ctx)) &&
2801 (SubExpr->getType()->isPointerType() ||
2802 SubExpr->getType()->isIntegralType(Ctx)) &&
2803 (Ctx.getTypeSize(E->getType()) ==
2804 Ctx.getTypeSize(SubExpr->getType()));
2805
2806 if (IsIdentityCast || IsSameWidthCast)
2807 return SubExpr;
2808 } else if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2809 return NTTP->getReplacement();
2810
2811 return E;
2812 };
2813 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2814 IgnoreNoopCastsSingleStep);
2815}
2816
2817Expr *Expr::IgnoreUnlessSpelledInSource() {
2818 auto IgnoreImplicitConstructorSingleStep = [](Expr *E) {
2819 if (auto *Cast = dyn_cast<CXXFunctionalCastExpr>(E)) {
2820 auto *SE = Cast->getSubExpr();
2821 if (SE->getSourceRange() == E->getSourceRange())
2822 return SE;
2823 }
2824
2825 if (auto *C = dyn_cast<CXXConstructExpr>(E)) {
2826 auto NumArgs = C->getNumArgs();
2827 if (NumArgs == 1 ||
2828 (NumArgs > 1 && isa<CXXDefaultArgExpr>(C->getArg(1)))) {
2829 Expr *A = C->getArg(0);
2830 if (A->getSourceRange() == E->getSourceRange() || C->isElidable())
2831 return A;
2832 }
2833 }
2834 return E;
2835 };
2836 auto IgnoreImplicitMemberCallSingleStep = [](Expr *E) {
2837 if (auto *C = dyn_cast<CXXMemberCallExpr>(E)) {
2838 Expr *ExprNode = C->getImplicitObjectArgument();
2839 if (ExprNode->getSourceRange() == E->getSourceRange()) {
2840 return ExprNode;
2841 }
2842 if (auto *PE = dyn_cast<ParenExpr>(ExprNode)) {
2843 if (PE->getSourceRange() == C->getSourceRange()) {
2844 return cast<Expr>(PE);
2845 }
2846 }
2847 ExprNode = ExprNode->IgnoreParenImpCasts();
2848 if (ExprNode->getSourceRange() == E->getSourceRange())
2849 return ExprNode;
2850 }
2851 return E;
2852 };
2853 return IgnoreExprNodes(
2854 this, IgnoreImplicitSingleStep, IgnoreImplicitCastsExtraSingleStep,
2855 IgnoreParensOnlySingleStep, IgnoreImplicitConstructorSingleStep,
2856 IgnoreImplicitMemberCallSingleStep);
2857}
2858
2859bool Expr::isDefaultArgument() const {
2860 const Expr *E = this;
2861 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2862 E = M->getSubExpr();
2863
2864 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2865 E = ICE->getSubExprAsWritten();
2866
2867 return isa<CXXDefaultArgExpr>(E);
2868}
2869
2870/// Skip over any no-op casts and any temporary-binding
2871/// expressions.
2872static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2873 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2874 E = M->getSubExpr();
2875
2876 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2877 if (ICE->getCastKind() == CK_NoOp)
2878 E = ICE->getSubExpr();
2879 else
2880 break;
2881 }
2882
2883 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2884 E = BE->getSubExpr();
2885
2886 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2887 if (ICE->getCastKind() == CK_NoOp)
2888 E = ICE->getSubExpr();
2889 else
2890 break;
2891 }
2892
2893 return E->IgnoreParens();
2894}
2895
2896/// isTemporaryObject - Determines if this expression produces a
2897/// temporary of the given class type.
2898bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2899 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2900 return false;
2901
2902 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2903
2904 // Temporaries are by definition pr-values of class type.
2905 if (!E->Classify(C).isPRValue()) {
2906 // In this context, property reference is a message call and is pr-value.
2907 if (!isa<ObjCPropertyRefExpr>(E))
2908 return false;
2909 }
2910
2911 // Black-list a few cases which yield pr-values of class type that don't
2912 // refer to temporaries of that type:
2913
2914 // - implicit derived-to-base conversions
2915 if (isa<ImplicitCastExpr>(E)) {
2916 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2917 case CK_DerivedToBase:
2918 case CK_UncheckedDerivedToBase:
2919 return false;
2920 default:
2921 break;
2922 }
2923 }
2924
2925 // - member expressions (all)
2926 if (isa<MemberExpr>(E))
2927 return false;
2928
2929 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2930 if (BO->isPtrMemOp())
2931 return false;
2932
2933 // - opaque values (all)
2934 if (isa<OpaqueValueExpr>(E))
2935 return false;
2936
2937 return true;
2938}
2939
2940bool Expr::isImplicitCXXThis() const {
2941 const Expr *E = this;
2942
2943 // Strip away parentheses and casts we don't care about.
2944 while (true) {
2945 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2946 E = Paren->getSubExpr();
2947 continue;
2948 }
2949
2950 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2951 if (ICE->getCastKind() == CK_NoOp ||
2952 ICE->getCastKind() == CK_LValueToRValue ||
2953 ICE->getCastKind() == CK_DerivedToBase ||
2954 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2955 E = ICE->getSubExpr();
2956 continue;
2957 }
2958 }
2959
2960 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2961 if (UnOp->getOpcode() == UO_Extension) {
2962 E = UnOp->getSubExpr();
2963 continue;
2964 }
2965 }
2966
2967 if (const MaterializeTemporaryExpr *M
2968 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2969 E = M->getSubExpr();
2970 continue;
2971 }
2972
2973 break;
2974 }
2975
2976 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2977 return This->isImplicit();
2978
2979 return false;
2980}
2981
2982/// hasAnyTypeDependentArguments - Determines if any of the expressions
2983/// in Exprs is type-dependent.
2984bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2985 for (unsigned I = 0; I < Exprs.size(); ++I)
2986 if (Exprs[I]->isTypeDependent())
2987 return true;
2988
2989 return false;
2990}
2991
2992bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2993 const Expr **Culprit) const {
2994 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2995, __PRETTY_FUNCTION__))
2995 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 2995, __PRETTY_FUNCTION__))
;
2996
2997 // This function is attempting whether an expression is an initializer
2998 // which can be evaluated at compile-time. It very closely parallels
2999 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
3000 // will lead to unexpected results. Like ConstExprEmitter, it falls back
3001 // to isEvaluatable most of the time.
3002 //
3003 // If we ever capture reference-binding directly in the AST, we can
3004 // kill the second parameter.
3005
3006 if (IsForRef) {
3007 EvalResult Result;
3008 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
3009 return true;
3010 if (Culprit)
3011 *Culprit = this;
3012 return false;
3013 }
3014
3015 switch (getStmtClass()) {
3016 default: break;
3017 case Stmt::ExprWithCleanupsClass:
3018 return cast<ExprWithCleanups>(this)->getSubExpr()->isConstantInitializer(
3019 Ctx, IsForRef, Culprit);
3020 case StringLiteralClass:
3021 case ObjCEncodeExprClass:
3022 return true;
3023 case CXXTemporaryObjectExprClass:
3024 case CXXConstructExprClass: {
3025 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3026
3027 if (CE->getConstructor()->isTrivial() &&
3028 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
3029 // Trivial default constructor
3030 if (!CE->getNumArgs()) return true;
3031
3032 // Trivial copy constructor
3033 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3033, __PRETTY_FUNCTION__))
;
3034 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
3035 }
3036
3037 break;
3038 }
3039 case ConstantExprClass: {
3040 // FIXME: We should be able to return "true" here, but it can lead to extra
3041 // error messages. E.g. in Sema/array-init.c.
3042 const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
3043 return Exp->isConstantInitializer(Ctx, false, Culprit);
3044 }
3045 case CompoundLiteralExprClass: {
3046 // This handles gcc's extension that allows global initializers like
3047 // "struct x {int x;} x = (struct x) {};".
3048 // FIXME: This accepts other cases it shouldn't!
3049 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
3050 return Exp->isConstantInitializer(Ctx, false, Culprit);
3051 }
3052 case DesignatedInitUpdateExprClass: {
3053 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
3054 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
3055 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
3056 }
3057 case InitListExprClass: {
3058 const InitListExpr *ILE = cast<InitListExpr>(this);
3059 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3059, __PRETTY_FUNCTION__))
;
3060 if (ILE->getType()->isArrayType()) {
3061 unsigned numInits = ILE->getNumInits();
3062 for (unsigned i = 0; i < numInits; i++) {
3063 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
3064 return false;
3065 }
3066 return true;
3067 }
3068
3069 if (ILE->getType()->isRecordType()) {
3070 unsigned ElementNo = 0;
3071 RecordDecl *RD = ILE->getType()->castAs<RecordType>()->getDecl();
3072 for (const auto *Field : RD->fields()) {
3073 // If this is a union, skip all the fields that aren't being initialized.
3074 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
3075 continue;
3076
3077 // Don't emit anonymous bitfields, they just affect layout.
3078 if (Field->isUnnamedBitfield())
3079 continue;
3080
3081 if (ElementNo < ILE->getNumInits()) {
3082 const Expr *Elt = ILE->getInit(ElementNo++);
3083 if (Field->isBitField()) {
3084 // Bitfields have to evaluate to an integer.
3085 EvalResult Result;
3086 if (!Elt->EvaluateAsInt(Result, Ctx)) {
3087 if (Culprit)
3088 *Culprit = Elt;
3089 return false;
3090 }
3091 } else {
3092 bool RefType = Field->getType()->isReferenceType();
3093 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
3094 return false;
3095 }
3096 }
3097 }
3098 return true;
3099 }
3100
3101 break;
3102 }
3103 case ImplicitValueInitExprClass:
3104 case NoInitExprClass:
3105 return true;
3106 case ParenExprClass:
3107 return cast<ParenExpr>(this)->getSubExpr()
3108 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3109 case GenericSelectionExprClass:
3110 return cast<GenericSelectionExpr>(this)->getResultExpr()
3111 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3112 case ChooseExprClass:
3113 if (cast<ChooseExpr>(this)->isConditionDependent()) {
3114 if (Culprit)
3115 *Culprit = this;
3116 return false;
3117 }
3118 return cast<ChooseExpr>(this)->getChosenSubExpr()
3119 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3120 case UnaryOperatorClass: {
3121 const UnaryOperator* Exp = cast<UnaryOperator>(this);
3122 if (Exp->getOpcode() == UO_Extension)
3123 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3124 break;
3125 }
3126 case CXXFunctionalCastExprClass:
3127 case CXXStaticCastExprClass:
3128 case ImplicitCastExprClass:
3129 case CStyleCastExprClass:
3130 case ObjCBridgedCastExprClass:
3131 case CXXDynamicCastExprClass:
3132 case CXXReinterpretCastExprClass:
3133 case CXXAddrspaceCastExprClass:
3134 case CXXConstCastExprClass: {
3135 const CastExpr *CE = cast<CastExpr>(this);
3136
3137 // Handle misc casts we want to ignore.
3138 if (CE->getCastKind() == CK_NoOp ||
3139 CE->getCastKind() == CK_LValueToRValue ||
3140 CE->getCastKind() == CK_ToUnion ||
3141 CE->getCastKind() == CK_ConstructorConversion ||
3142 CE->getCastKind() == CK_NonAtomicToAtomic ||
3143 CE->getCastKind() == CK_AtomicToNonAtomic ||
3144 CE->getCastKind() == CK_IntToOCLSampler)
3145 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3146
3147 break;
3148 }
3149 case MaterializeTemporaryExprClass:
3150 return cast<MaterializeTemporaryExpr>(this)
3151 ->getSubExpr()
3152 ->isConstantInitializer(Ctx, false, Culprit);
3153
3154 case SubstNonTypeTemplateParmExprClass:
3155 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
3156 ->isConstantInitializer(Ctx, false, Culprit);
3157 case CXXDefaultArgExprClass:
3158 return cast<CXXDefaultArgExpr>(this)->getExpr()
3159 ->isConstantInitializer(Ctx, false, Culprit);
3160 case CXXDefaultInitExprClass:
3161 return cast<CXXDefaultInitExpr>(this)->getExpr()
3162 ->isConstantInitializer(Ctx, false, Culprit);
3163 }
3164 // Allow certain forms of UB in constant initializers: signed integer
3165 // overflow and floating-point division by zero. We'll give a warning on
3166 // these, but they're common enough that we have to accept them.
3167 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
3168 return true;
3169 if (Culprit)
3170 *Culprit = this;
3171 return false;
3172}
3173
3174bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
3175 const FunctionDecl* FD = getDirectCallee();
3176 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
3177 FD->getBuiltinID() != Builtin::BI__builtin_assume))
3178 return false;
3179
3180 const Expr* Arg = getArg(0);
3181 bool ArgVal;
3182 return !Arg->isValueDependent() &&
3183 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3184}
3185
3186namespace {
3187 /// Look for any side effects within a Stmt.
3188 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
3189 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
3190 const bool IncludePossibleEffects;
3191 bool HasSideEffects;
3192
3193 public:
3194 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
3195 : Inherited(Context),
3196 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
3197
3198 bool hasSideEffects() const { return HasSideEffects; }
3199
3200 void VisitDecl(const Decl *D) {
3201 if (!D)
3202 return;
3203
3204 // We assume the caller checks subexpressions (eg, the initializer, VLA
3205 // bounds) for side-effects on our behalf.
3206 if (auto *VD = dyn_cast<VarDecl>(D)) {
3207 // Registering a destructor is a side-effect.
3208 if (IncludePossibleEffects && VD->isThisDeclarationADefinition() &&
3209 VD->needsDestruction(Context))
3210 HasSideEffects = true;
3211 }
3212 }
3213
3214 void VisitDeclStmt(const DeclStmt *DS) {
3215 for (auto *D : DS->decls())
3216 VisitDecl(D);
3217 Inherited::VisitDeclStmt(DS);
3218 }
3219
3220 void VisitExpr(const Expr *E) {
3221 if (!HasSideEffects &&
3222 E->HasSideEffects(Context, IncludePossibleEffects))
3223 HasSideEffects = true;
3224 }
3225 };
3226}
3227
3228bool Expr::HasSideEffects(const ASTContext &Ctx,
3229 bool IncludePossibleEffects) const {
3230 // In circumstances where we care about definite side effects instead of
3231 // potential side effects, we want to ignore expressions that are part of a
3232 // macro expansion as a potential side effect.
3233 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3234 return false;
3235
3236 if (isInstantiationDependent())
3237 return IncludePossibleEffects;
3238
3239 switch (getStmtClass()) {
3240 case NoStmtClass:
3241 #define ABSTRACT_STMT(Type)
3242 #define STMT(Type, Base) case Type##Class:
3243 #define EXPR(Type, Base)
3244 #include "clang/AST/StmtNodes.inc"
3245 llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3245)
;
3246
3247 case DependentScopeDeclRefExprClass:
3248 case CXXUnresolvedConstructExprClass:
3249 case CXXDependentScopeMemberExprClass:
3250 case UnresolvedLookupExprClass:
3251 case UnresolvedMemberExprClass:
3252 case PackExpansionExprClass:
3253 case SubstNonTypeTemplateParmPackExprClass:
3254 case FunctionParmPackExprClass:
3255 case TypoExprClass:
3256 case RecoveryExprClass:
3257 case CXXFoldExprClass:
3258 llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3258)
;
3259
3260 case DeclRefExprClass:
3261 case ObjCIvarRefExprClass:
3262 case PredefinedExprClass:
3263 case IntegerLiteralClass:
3264 case FixedPointLiteralClass:
3265 case FloatingLiteralClass:
3266 case ImaginaryLiteralClass:
3267 case StringLiteralClass:
3268 case CharacterLiteralClass:
3269 case OffsetOfExprClass:
3270 case ImplicitValueInitExprClass:
3271 case UnaryExprOrTypeTraitExprClass:
3272 case AddrLabelExprClass:
3273 case GNUNullExprClass:
3274 case ArrayInitIndexExprClass:
3275 case NoInitExprClass:
3276 case CXXBoolLiteralExprClass:
3277 case CXXNullPtrLiteralExprClass:
3278 case CXXThisExprClass:
3279 case CXXScalarValueInitExprClass:
3280 case TypeTraitExprClass:
3281 case ArrayTypeTraitExprClass:
3282 case ExpressionTraitExprClass:
3283 case CXXNoexceptExprClass:
3284 case SizeOfPackExprClass:
3285 case ObjCStringLiteralClass:
3286 case ObjCEncodeExprClass:
3287 case ObjCBoolLiteralExprClass:
3288 case ObjCAvailabilityCheckExprClass:
3289 case CXXUuidofExprClass:
3290 case OpaqueValueExprClass:
3291 case SourceLocExprClass:
3292 case ConceptSpecializationExprClass:
3293 case RequiresExprClass:
3294 // These never have a side-effect.
3295 return false;
3296
3297 case ConstantExprClass:
3298 // FIXME: Move this into the "return false;" block above.
3299 return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
3300 Ctx, IncludePossibleEffects);
3301
3302 case CallExprClass:
3303 case CXXOperatorCallExprClass:
3304 case CXXMemberCallExprClass:
3305 case CUDAKernelCallExprClass:
3306 case UserDefinedLiteralClass: {
3307 // We don't know a call definitely has side effects, except for calls
3308 // to pure/const functions that definitely don't.
3309 // If the call itself is considered side-effect free, check the operands.
3310 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3311 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3312 if (IsPure || !IncludePossibleEffects)
3313 break;
3314 return true;
3315 }
3316
3317 case BlockExprClass:
3318 case CXXBindTemporaryExprClass:
3319 if (!IncludePossibleEffects)
3320 break;
3321 return true;
3322
3323 case MSPropertyRefExprClass:
3324 case MSPropertySubscriptExprClass:
3325 case CompoundAssignOperatorClass:
3326 case VAArgExprClass:
3327 case AtomicExprClass:
3328 case CXXThrowExprClass:
3329 case CXXNewExprClass:
3330 case CXXDeleteExprClass:
3331 case CoawaitExprClass:
3332 case DependentCoawaitExprClass:
3333 case CoyieldExprClass:
3334 // These always have a side-effect.
3335 return true;
3336
3337 case StmtExprClass: {
3338 // StmtExprs have a side-effect if any substatement does.
3339 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3340 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3341 return Finder.hasSideEffects();
3342 }
3343
3344 case ExprWithCleanupsClass:
3345 if (IncludePossibleEffects)
3346 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3347 return true;
3348 break;
3349
3350 case ParenExprClass:
3351 case ArraySubscriptExprClass:
3352 case MatrixSubscriptExprClass:
3353 case OMPArraySectionExprClass:
3354 case OMPArrayShapingExprClass:
3355 case OMPIteratorExprClass:
3356 case MemberExprClass:
3357 case ConditionalOperatorClass:
3358 case BinaryConditionalOperatorClass:
3359 case CompoundLiteralExprClass:
3360 case ExtVectorElementExprClass:
3361 case DesignatedInitExprClass:
3362 case DesignatedInitUpdateExprClass:
3363 case ArrayInitLoopExprClass:
3364 case ParenListExprClass:
3365 case CXXPseudoDestructorExprClass:
3366 case CXXRewrittenBinaryOperatorClass:
3367 case CXXStdInitializerListExprClass:
3368 case SubstNonTypeTemplateParmExprClass:
3369 case MaterializeTemporaryExprClass:
3370 case ShuffleVectorExprClass:
3371 case ConvertVectorExprClass:
3372 case AsTypeExprClass:
3373 // These have a side-effect if any subexpression does.
3374 break;
3375
3376 case UnaryOperatorClass:
3377 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3378 return true;
3379 break;
3380
3381 case BinaryOperatorClass:
3382 if (cast<BinaryOperator>(this)->isAssignmentOp())
3383 return true;
3384 break;
3385
3386 case InitListExprClass:
3387 // FIXME: The children for an InitListExpr doesn't include the array filler.
3388 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3389 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3390 return true;
3391 break;
3392
3393 case GenericSelectionExprClass:
3394 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3395 HasSideEffects(Ctx, IncludePossibleEffects);
3396
3397 case ChooseExprClass:
3398 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3399 Ctx, IncludePossibleEffects);
3400
3401 case CXXDefaultArgExprClass:
3402 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3403 Ctx, IncludePossibleEffects);
3404
3405 case CXXDefaultInitExprClass: {
3406 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3407 if (const Expr *E = FD->getInClassInitializer())
3408 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3409 // If we've not yet parsed the initializer, assume it has side-effects.
3410 return true;
3411 }
3412
3413 case CXXDynamicCastExprClass: {
3414 // A dynamic_cast expression has side-effects if it can throw.
3415 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3416 if (DCE->getTypeAsWritten()->isReferenceType() &&
3417 DCE->getCastKind() == CK_Dynamic)
3418 return true;
3419 }
3420 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3421 case ImplicitCastExprClass:
3422 case CStyleCastExprClass:
3423 case CXXStaticCastExprClass:
3424 case CXXReinterpretCastExprClass:
3425 case CXXConstCastExprClass:
3426 case CXXAddrspaceCastExprClass:
3427 case CXXFunctionalCastExprClass:
3428 case BuiltinBitCastExprClass: {
3429 // While volatile reads are side-effecting in both C and C++, we treat them
3430 // as having possible (not definite) side-effects. This allows idiomatic
3431 // code to behave without warning, such as sizeof(*v) for a volatile-
3432 // qualified pointer.
3433 if (!IncludePossibleEffects)
3434 break;
3435
3436 const CastExpr *CE = cast<CastExpr>(this);
3437 if (CE->getCastKind() == CK_LValueToRValue &&
3438 CE->getSubExpr()->getType().isVolatileQualified())
3439 return true;
3440 break;
3441 }
3442
3443 case CXXTypeidExprClass:
3444 // typeid might throw if its subexpression is potentially-evaluated, so has
3445 // side-effects in that case whether or not its subexpression does.
3446 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3447
3448 case CXXConstructExprClass:
3449 case CXXTemporaryObjectExprClass: {
3450 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3451 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3452 return true;
3453 // A trivial constructor does not add any side-effects of its own. Just look
3454 // at its arguments.
3455 break;
3456 }
3457
3458 case CXXInheritedCtorInitExprClass: {
3459 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3460 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3461 return true;
3462 break;
3463 }
3464
3465 case LambdaExprClass: {
3466 const LambdaExpr *LE = cast<LambdaExpr>(this);
3467 for (Expr *E : LE->capture_inits())
3468 if (E && E->HasSideEffects(Ctx, IncludePossibleEffects))
3469 return true;
3470 return false;
3471 }
3472
3473 case PseudoObjectExprClass: {
3474 // Only look for side-effects in the semantic form, and look past
3475 // OpaqueValueExpr bindings in that form.
3476 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3477 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3478 E = PO->semantics_end();
3479 I != E; ++I) {
3480 const Expr *Subexpr = *I;
3481 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3482 Subexpr = OVE->getSourceExpr();
3483 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3484 return true;
3485 }
3486 return false;
3487 }
3488
3489 case ObjCBoxedExprClass:
3490 case ObjCArrayLiteralClass:
3491 case ObjCDictionaryLiteralClass:
3492 case ObjCSelectorExprClass:
3493 case ObjCProtocolExprClass:
3494 case ObjCIsaExprClass:
3495 case ObjCIndirectCopyRestoreExprClass:
3496 case ObjCSubscriptRefExprClass:
3497 case ObjCBridgedCastExprClass:
3498 case ObjCMessageExprClass:
3499 case ObjCPropertyRefExprClass:
3500 // FIXME: Classify these cases better.
3501 if (IncludePossibleEffects)
3502 return true;
3503 break;
3504 }
3505
3506 // Recurse to children.
3507 for (const Stmt *SubStmt : children())
3508 if (SubStmt &&
3509 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3510 return true;
3511
3512 return false;
3513}
3514
3515FPOptions Expr::getFPFeaturesInEffect(const LangOptions &LO) const {
3516 if (auto Call = dyn_cast<CallExpr>(this))
3517 return Call->getFPFeaturesInEffect(LO);
3518 if (auto UO = dyn_cast<UnaryOperator>(this))
3519 return UO->getFPFeaturesInEffect(LO);
3520 if (auto BO = dyn_cast<BinaryOperator>(this))
3521 return BO->getFPFeaturesInEffect(LO);
3522 if (auto Cast = dyn_cast<CastExpr>(this))
3523 return Cast->getFPFeaturesInEffect(LO);
3524 return FPOptions::defaultWithoutTrailingStorage(LO);
3525}
3526
3527namespace {
3528 /// Look for a call to a non-trivial function within an expression.
3529 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3530 {
3531 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3532
3533 bool NonTrivial;
3534
3535 public:
3536 explicit NonTrivialCallFinder(const ASTContext &Context)
3537 : Inherited(Context), NonTrivial(false) { }
3538
3539 bool hasNonTrivialCall() const { return NonTrivial; }
3540
3541 void VisitCallExpr(const CallExpr *E) {
3542 if (const CXXMethodDecl *Method
3543 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3544 if (Method->isTrivial()) {
3545 // Recurse to children of the call.
3546 Inherited::VisitStmt(E);
3547 return;
3548 }
3549 }
3550
3551 NonTrivial = true;
3552 }
3553
3554 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3555 if (E->getConstructor()->isTrivial()) {
3556 // Recurse to children of the call.
3557 Inherited::VisitStmt(E);
3558 return;
3559 }
3560
3561 NonTrivial = true;
3562 }
3563
3564 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3565 if (E->getTemporary()->getDestructor()->isTrivial()) {
3566 Inherited::VisitStmt(E);
3567 return;
3568 }
3569
3570 NonTrivial = true;
3571 }
3572 };
3573}
3574
3575bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3576 NonTrivialCallFinder Finder(Ctx);
3577 Finder.Visit(this);
3578 return Finder.hasNonTrivialCall();
3579}
3580
3581/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3582/// pointer constant or not, as well as the specific kind of constant detected.
3583/// Null pointer constants can be integer constant expressions with the
3584/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3585/// (a GNU extension).
3586Expr::NullPointerConstantKind
3587Expr::isNullPointerConstant(ASTContext &Ctx,
3588 NullPointerConstantValueDependence NPC) const {
3589 if (isValueDependent() &&
3590 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3591 // Error-dependent expr should never be a null pointer.
3592 if (containsErrors())
3593 return NPCK_NotNull;
3594 switch (NPC) {
3595 case NPC_NeverValueDependent:
3596 llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3596)
;
3597 case NPC_ValueDependentIsNull:
3598 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3599 return NPCK_ZeroExpression;
3600 else
3601 return NPCK_NotNull;
3602
3603 case NPC_ValueDependentIsNotNull:
3604 return NPCK_NotNull;
3605 }
3606 }
3607
3608 // Strip off a cast to void*, if it exists. Except in C++.
3609 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3610 if (!Ctx.getLangOpts().CPlusPlus) {
3611 // Check that it is a cast to void*.
3612 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3613 QualType Pointee = PT->getPointeeType();
3614 Qualifiers Qs = Pointee.getQualifiers();
3615 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3616 // has non-default address space it is not treated as nullptr.
3617 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3618 // since it cannot be assigned to a pointer to constant address space.
3619 if ((Ctx.getLangOpts().OpenCLVersion >= 200 &&
3620 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3621 (Ctx.getLangOpts().OpenCL &&
3622 Ctx.getLangOpts().OpenCLVersion < 200 &&
3623 Pointee.getAddressSpace() == LangAS::opencl_private))
3624 Qs.removeAddressSpace();
3625
3626 if (Pointee->isVoidType() && Qs.empty() && // to void*
3627 CE->getSubExpr()->getType()->isIntegerType()) // from int
3628 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3629 }
3630 }
3631 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3632 // Ignore the ImplicitCastExpr type entirely.
3633 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3634 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3635 // Accept ((void*)0) as a null pointer constant, as many other
3636 // implementations do.
3637 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3638 } else if (const GenericSelectionExpr *GE =
3639 dyn_cast<GenericSelectionExpr>(this)) {
3640 if (GE->isResultDependent())
3641 return NPCK_NotNull;
3642 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3643 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3644 if (CE->isConditionDependent())
3645 return NPCK_NotNull;
3646 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3647 } else if (const CXXDefaultArgExpr *DefaultArg
3648 = dyn_cast<CXXDefaultArgExpr>(this)) {
3649 // See through default argument expressions.
3650 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3651 } else if (const CXXDefaultInitExpr *DefaultInit
3652 = dyn_cast<CXXDefaultInitExpr>(this)) {
3653 // See through default initializer expressions.
3654 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3655 } else if (isa<GNUNullExpr>(this)) {
3656 // The GNU __null extension is always a null pointer constant.
3657 return NPCK_GNUNull;
3658 } else if (const MaterializeTemporaryExpr *M
3659 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3660 return M->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3661 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3662 if (const Expr *Source = OVE->getSourceExpr())
3663 return Source->isNullPointerConstant(Ctx, NPC);
3664 }
3665
3666 // If the expression has no type information, it cannot be a null pointer
3667 // constant.
3668 if (getType().isNull())
3669 return NPCK_NotNull;
3670
3671 // C++11 nullptr_t is always a null pointer constant.
3672 if (getType()->isNullPtrType())
3673 return NPCK_CXX11_nullptr;
3674
3675 if (const RecordType *UT = getType()->getAsUnionType())
3676 if (!Ctx.getLangOpts().CPlusPlus11 &&
3677 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3678 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3679 const Expr *InitExpr = CLE->getInitializer();
3680 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3681 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3682 }
3683 // This expression must be an integer type.
3684 if (!getType()->isIntegerType() ||
3685 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3686 return NPCK_NotNull;
3687
3688 if (Ctx.getLangOpts().CPlusPlus11) {
3689 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3690 // value zero or a prvalue of type std::nullptr_t.
3691 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3692 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3693 if (Lit && !Lit->getValue())
3694 return NPCK_ZeroLiteral;
3695 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3696 return NPCK_NotNull;
3697 } else {
3698 // If we have an integer constant expression, we need to *evaluate* it and
3699 // test for the value 0.
3700 if (!isIntegerConstantExpr(Ctx))
3701 return NPCK_NotNull;
3702 }
3703
3704 if (EvaluateKnownConstInt(Ctx) != 0)
3705 return NPCK_NotNull;
3706
3707 if (isa<IntegerLiteral>(this))
3708 return NPCK_ZeroLiteral;
3709 return NPCK_ZeroExpression;
3710}
3711
3712/// If this expression is an l-value for an Objective C
3713/// property, find the underlying property reference expression.
3714const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3715 const Expr *E = this;
3716 while (true) {
3717 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3719, __PRETTY_FUNCTION__))
3718 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3719, __PRETTY_FUNCTION__))
3719 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 3719, __PRETTY_FUNCTION__))
;
3720 E = E->IgnoreParenCasts();
3721 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3722 if (BO->getOpcode() == BO_Comma) {
3723 E = BO->getRHS();
3724 continue;
3725 }
3726 }
3727
3728 break;
3729 }
3730
3731 return cast<ObjCPropertyRefExpr>(E);
3732}
3733
3734bool Expr::isObjCSelfExpr() const {
3735 const Expr *E = IgnoreParenImpCasts();
3736
3737 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3738 if (!DRE)
3739 return false;
3740
3741 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3742 if (!Param)
3743 return false;
3744
3745 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3746 if (!M)
3747 return false;
3748
3749 return M->getSelfDecl() == Param;
3750}
3751
3752FieldDecl *Expr::getSourceBitField() {
3753 Expr *E = this->IgnoreParens();
3754
3755 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3756 if (ICE->getCastKind() == CK_LValueToRValue ||
3757 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3758 E = ICE->getSubExpr()->IgnoreParens();
3759 else
3760 break;
3761 }
3762
3763 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3764 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3765 if (Field->isBitField())
3766 return Field;
3767
3768 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3769 FieldDecl *Ivar = IvarRef->getDecl();
3770 if (Ivar->isBitField())
3771 return Ivar;
3772 }
3773
3774 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3775 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3776 if (Field->isBitField())
3777 return Field;
3778
3779 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3780 if (Expr *E = BD->getBinding())
3781 return E->getSourceBitField();
3782 }
3783
3784 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3785 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3786 return BinOp->getLHS()->getSourceBitField();
3787
3788 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3789 return BinOp->getRHS()->getSourceBitField();
3790 }
3791
3792 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3793 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3794 return UnOp->getSubExpr()->getSourceBitField();
3795
3796 return nullptr;
3797}
3798
3799bool Expr::refersToVectorElement() const {
3800 // FIXME: Why do we not just look at the ObjectKind here?
3801 const Expr *E = this->IgnoreParens();
3802
3803 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3804 if (ICE->getValueKind() != VK_RValue &&
3805 ICE->getCastKind() == CK_NoOp)
3806 E = ICE->getSubExpr()->IgnoreParens();
3807 else
3808 break;
3809 }
3810
3811 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3812 return ASE->getBase()->getType()->isVectorType();
3813
3814 if (isa<ExtVectorElementExpr>(E))
3815 return true;
3816
3817 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3818 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3819 if (auto *E = BD->getBinding())
3820 return E->refersToVectorElement();
3821
3822 return false;
3823}
3824
3825bool Expr::refersToGlobalRegisterVar() const {
3826 const Expr *E = this->IgnoreParenImpCasts();
3827
3828 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3829 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3830 if (VD->getStorageClass() == SC_Register &&
3831 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3832 return true;
3833
3834 return false;
3835}
3836
3837bool Expr::isSameComparisonOperand(const Expr* E1, const Expr* E2) {
3838 E1 = E1->IgnoreParens();
3839 E2 = E2->IgnoreParens();
3840
3841 if (E1->getStmtClass() != E2->getStmtClass())
3842 return false;
3843
3844 switch (E1->getStmtClass()) {
3845 default:
3846 return false;
3847 case CXXThisExprClass:
3848 return true;
3849 case DeclRefExprClass: {
3850 // DeclRefExpr without an ImplicitCastExpr can happen for integral
3851 // template parameters.
3852 const auto *DRE1 = cast<DeclRefExpr>(E1);
3853 const auto *DRE2 = cast<DeclRefExpr>(E2);
3854 return DRE1->isRValue() && DRE2->isRValue() &&
3855 DRE1->getDecl() == DRE2->getDecl();
3856 }
3857 case ImplicitCastExprClass: {
3858 // Peel off implicit casts.
3859 while (true) {
3860 const auto *ICE1 = dyn_cast<ImplicitCastExpr>(E1);
3861 const auto *ICE2 = dyn_cast<ImplicitCastExpr>(E2);
3862 if (!ICE1 || !ICE2)
3863 return false;
3864 if (ICE1->getCastKind() != ICE2->getCastKind())
3865 return false;
3866 E1 = ICE1->getSubExpr()->IgnoreParens();
3867 E2 = ICE2->getSubExpr()->IgnoreParens();
3868 // The final cast must be one of these types.
3869 if (ICE1->getCastKind() == CK_LValueToRValue ||
3870 ICE1->getCastKind() == CK_ArrayToPointerDecay ||
3871 ICE1->getCastKind() == CK_FunctionToPointerDecay) {
3872 break;
3873 }
3874 }
3875
3876 const auto *DRE1 = dyn_cast<DeclRefExpr>(E1);
3877 const auto *DRE2 = dyn_cast<DeclRefExpr>(E2);
3878 if (DRE1 && DRE2)
3879 return declaresSameEntity(DRE1->getDecl(), DRE2->getDecl());
3880
3881 const auto *Ivar1 = dyn_cast<ObjCIvarRefExpr>(E1);
3882 const auto *Ivar2 = dyn_cast<ObjCIvarRefExpr>(E2);
3883 if (Ivar1 && Ivar2) {
3884 return Ivar1->isFreeIvar() && Ivar2->isFreeIvar() &&
3885 declaresSameEntity(Ivar1->getDecl(), Ivar2->getDecl());
3886 }
3887
3888 const auto *Array1 = dyn_cast<ArraySubscriptExpr>(E1);
3889 const auto *Array2 = dyn_cast<ArraySubscriptExpr>(E2);
3890 if (Array1 && Array2) {
3891 if (!isSameComparisonOperand(Array1->getBase(), Array2->getBase()))
3892 return false;
3893
3894 auto Idx1 = Array1->getIdx();
3895 auto Idx2 = Array2->getIdx();
3896 const auto Integer1 = dyn_cast<IntegerLiteral>(Idx1);
3897 const auto Integer2 = dyn_cast<IntegerLiteral>(Idx2);
3898 if (Integer1 && Integer2) {
3899 if (!llvm::APInt::isSameValue(Integer1->getValue(),
3900 Integer2->getValue()))
3901 return false;
3902 } else {
3903 if (!isSameComparisonOperand(Idx1, Idx2))
3904 return false;
3905 }
3906
3907 return true;
3908 }
3909
3910 // Walk the MemberExpr chain.
3911 while (isa<MemberExpr>(E1) && isa<MemberExpr>(E2)) {
3912 const auto *ME1 = cast<MemberExpr>(E1);
3913 const auto *ME2 = cast<MemberExpr>(E2);
3914 if (!declaresSameEntity(ME1->getMemberDecl(), ME2->getMemberDecl()))
3915 return false;
3916 if (const auto *D = dyn_cast<VarDecl>(ME1->getMemberDecl()))
3917 if (D->isStaticDataMember())
3918 return true;
3919 E1 = ME1->getBase()->IgnoreParenImpCasts();
3920 E2 = ME2->getBase()->IgnoreParenImpCasts();
3921 }
3922
3923 if (isa<CXXThisExpr>(E1) && isa<CXXThisExpr>(E2))
3924 return true;
3925
3926 // A static member variable can end the MemberExpr chain with either
3927 // a MemberExpr or a DeclRefExpr.
3928 auto getAnyDecl = [](const Expr *E) -> const ValueDecl * {
3929 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
3930 return DRE->getDecl();
3931 if (const auto *ME = dyn_cast<MemberExpr>(E))
3932 return ME->getMemberDecl();
3933 return nullptr;
3934 };
3935
3936 const ValueDecl *VD1 = getAnyDecl(E1);
3937 const ValueDecl *VD2 = getAnyDecl(E2);
3938 return declaresSameEntity(VD1, VD2);
3939 }
3940 }
3941}
3942
3943/// isArrow - Return true if the base expression is a pointer to vector,
3944/// return false if the base expression is a vector.
3945bool ExtVectorElementExpr::isArrow() const {
3946 return getBase()->getType()->isPointerType();
3947}
3948
3949unsigned ExtVectorElementExpr::getNumElements() const {
3950 if (const VectorType *VT = getType()->getAs<VectorType>())
3951 return VT->getNumElements();
3952 return 1;
3953}
3954
3955/// containsDuplicateElements - Return true if any element access is repeated.
3956bool ExtVectorElementExpr::containsDuplicateElements() const {
3957 // FIXME: Refactor this code to an accessor on the AST node which returns the
3958 // "type" of component access, and share with code below and in Sema.
3959 StringRef Comp = Accessor->getName();
3960
3961 // Halving swizzles do not contain duplicate elements.
3962 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3963 return false;
3964
3965 // Advance past s-char prefix on hex swizzles.
3966 if (Comp[0] == 's' || Comp[0] == 'S')
3967 Comp = Comp.substr(1);
3968
3969 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3970 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3971 return true;
3972
3973 return false;
3974}
3975
3976/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3977void ExtVectorElementExpr::getEncodedElementAccess(
3978 SmallVectorImpl<uint32_t> &Elts) const {
3979 StringRef Comp = Accessor->getName();
3980 bool isNumericAccessor = false;
3981 if (Comp[0] == 's' || Comp[0] == 'S') {
3982 Comp = Comp.substr(1);
3983 isNumericAccessor = true;
3984 }
3985
3986 bool isHi = Comp == "hi";
3987 bool isLo = Comp == "lo";
3988 bool isEven = Comp == "even";
3989 bool isOdd = Comp == "odd";
3990
3991 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3992 uint64_t Index;
3993
3994 if (isHi)
3995 Index = e + i;
3996 else if (isLo)
3997 Index = i;
3998 else if (isEven)
3999 Index = 2 * i;
4000 else if (isOdd)
4001 Index = 2 * i + 1;
4002 else
4003 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
4004
4005 Elts.push_back(Index);
4006 }
4007}
4008
4009ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr *> args,
4010 QualType Type, SourceLocation BLoc,
4011 SourceLocation RP)
4012 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary),
4013 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size()) {
4014 SubExprs = new (C) Stmt*[args.size()];
4015 for (unsigned i = 0; i != args.size(); i++)
4016 SubExprs[i] = args[i];
4017
4018 setDependence(computeDependence(this));
4019}
4020
4021void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
4022 if (SubExprs) C.Deallocate(SubExprs);
4023
4024 this->NumExprs = Exprs.size();
4025 SubExprs = new (C) Stmt*[NumExprs];
4026 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
4027}
4028
4029GenericSelectionExpr::GenericSelectionExpr(
4030 const ASTContext &, SourceLocation GenericLoc, Expr *ControllingExpr,
4031 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4032 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4033 bool ContainsUnexpandedParameterPack, unsigned ResultIndex)
4034 : Expr(GenericSelectionExprClass, AssocExprs[ResultIndex]->getType(),
4035 AssocExprs[ResultIndex]->getValueKind(),
4036 AssocExprs[ResultIndex]->getObjectKind()),
4037 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
4038 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
4039 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4041, __PRETTY_FUNCTION__))
4040 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4041, __PRETTY_FUNCTION__))
4041 " 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4041, __PRETTY_FUNCTION__))
;
4042 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4042, __PRETTY_FUNCTION__))
;
4043
4044 GenericSelectionExprBits.GenericLoc = GenericLoc;
4045 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
4046 std::copy(AssocExprs.begin(), AssocExprs.end(),
4047 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
4048 std::copy(AssocTypes.begin(), AssocTypes.end(),
4049 getTrailingObjects<TypeSourceInfo *>());
4050
4051 setDependence(computeDependence(this, ContainsUnexpandedParameterPack));
4052}
4053
4054GenericSelectionExpr::GenericSelectionExpr(
4055 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4056 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4057 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4058 bool ContainsUnexpandedParameterPack)
4059 : Expr(GenericSelectionExprClass, Context.DependentTy, VK_RValue,
4060 OK_Ordinary),
4061 NumAssocs(AssocExprs.size()), ResultIndex(ResultDependentIndex),
4062 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
4063 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4065, __PRETTY_FUNCTION__))
4064 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4065, __PRETTY_FUNCTION__))
4065 " 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4065, __PRETTY_FUNCTION__))
;
4066
4067 GenericSelectionExprBits.GenericLoc = GenericLoc;
4068 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
4069 std::copy(AssocExprs.begin(), AssocExprs.end(),
4070 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
4071 std::copy(AssocTypes.begin(), AssocTypes.end(),
4072 getTrailingObjects<TypeSourceInfo *>());
4073
4074 setDependence(computeDependence(this, ContainsUnexpandedParameterPack));
4075}
4076
4077GenericSelectionExpr::GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs)
4078 : Expr(GenericSelectionExprClass, Empty), NumAssocs(NumAssocs) {}
4079
4080GenericSelectionExpr *GenericSelectionExpr::Create(
4081 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4082 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4083 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4084 bool ContainsUnexpandedParameterPack, unsigned ResultIndex) {
4085 unsigned NumAssocs = AssocExprs.size();
4086 void *Mem = Context.Allocate(
4087 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4088 alignof(GenericSelectionExpr));
4089 return new (Mem) GenericSelectionExpr(
4090 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
4091 RParenLoc, ContainsUnexpandedParameterPack, ResultIndex);
4092}
4093
4094GenericSelectionExpr *GenericSelectionExpr::Create(
4095 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4096 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4097 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4098 bool ContainsUnexpandedParameterPack) {
4099 unsigned NumAssocs = AssocExprs.size();
4100 void *Mem = Context.Allocate(
4101 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4102 alignof(GenericSelectionExpr));
4103 return new (Mem) GenericSelectionExpr(
4104 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
4105 RParenLoc, ContainsUnexpandedParameterPack);
4106}
4107
4108GenericSelectionExpr *
4109GenericSelectionExpr::CreateEmpty(const ASTContext &Context,
4110 unsigned NumAssocs) {
4111 void *Mem = Context.Allocate(
4112 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4113 alignof(GenericSelectionExpr));
4114 return new (Mem) GenericSelectionExpr(EmptyShell(), NumAssocs);
4115}
4116
4117//===----------------------------------------------------------------------===//
4118// DesignatedInitExpr
4119//===----------------------------------------------------------------------===//
4120
4121IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
4122 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4122, __PRETTY_FUNCTION__))
;
4123 if (Field.NameOrField & 0x01)
4124 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
4125 else
4126 return getField()->getIdentifier();
4127}
4128
4129DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
4130 llvm::ArrayRef<Designator> Designators,
4131 SourceLocation EqualOrColonLoc,
4132 bool GNUSyntax,
4133 ArrayRef<Expr *> IndexExprs, Expr *Init)
4134 : Expr(DesignatedInitExprClass, Ty, Init->getValueKind(),
4135 Init->getObjectKind()),
4136 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
4137 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
4138 this->Designators = new (C) Designator[NumDesignators];
4139
4140 // Record the initializer itself.
4141 child_iterator Child = child_begin();
4142 *Child++ = Init;
4143
4144 // Copy the designators and their subexpressions, computing
4145 // value-dependence along the way.
4146 unsigned IndexIdx = 0;
4147 for (unsigned I = 0; I != NumDesignators; ++I) {
4148 this->Designators[I] = Designators[I];
4149 if (this->Designators[I].isArrayDesignator()) {
4150 // Copy the index expressions into permanent storage.
4151 *Child++ = IndexExprs[IndexIdx++];
4152 } else if (this->Designators[I].isArrayRangeDesignator()) {
4153 // Copy the start/end expressions into permanent storage.
4154 *Child++ = IndexExprs[IndexIdx++];
4155 *Child++ = IndexExprs[IndexIdx++];
4156 }
4157 }
4158
4159 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4159, __PRETTY_FUNCTION__))
;
4160 setDependence(computeDependence(this));
4161}
4162
4163DesignatedInitExpr *
4164DesignatedInitExpr::Create(const ASTContext &C,
4165 llvm::ArrayRef<Designator> Designators,
4166 ArrayRef<Expr*> IndexExprs,
4167 SourceLocation ColonOrEqualLoc,
4168 bool UsesColonSyntax, Expr *Init) {
4169 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
4170 alignof(DesignatedInitExpr));
4171 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
4172 ColonOrEqualLoc, UsesColonSyntax,
4173 IndexExprs, Init);
4174}
4175
4176DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
4177 unsigned NumIndexExprs) {
4178 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
4179 alignof(DesignatedInitExpr));
4180 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
4181}
4182
4183void DesignatedInitExpr::setDesignators(const ASTContext &C,
4184 const Designator *Desigs,
4185 unsigned NumDesigs) {
4186 Designators = new (C) Designator[NumDesigs];
4187 NumDesignators = NumDesigs;
4188 for (unsigned I = 0; I != NumDesigs; ++I)
4189 Designators[I] = Desigs[I];
4190}
4191
4192SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
4193 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
4194 if (size() == 1)
4195 return DIE->getDesignator(0)->getSourceRange();
4196 return SourceRange(DIE->getDesignator(0)->getBeginLoc(),
4197 DIE->getDesignator(size() - 1)->getEndLoc());
4198}
4199
4200SourceLocation DesignatedInitExpr::getBeginLoc() const {
4201 SourceLocation StartLoc;
4202 auto *DIE = const_cast<DesignatedInitExpr *>(this);
4203 Designator &First = *DIE->getDesignator(0);
4204 if (First.isFieldDesignator()) {
4205 if (GNUSyntax)
4206 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
4207 else
4208 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
4209 } else
4210 StartLoc =
4211 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
4212 return StartLoc;
4213}
4214
4215SourceLocation DesignatedInitExpr::getEndLoc() const {
4216 return getInit()->getEndLoc();
4217}
4218
4219Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
4220 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4220, __PRETTY_FUNCTION__))
;
4221 return getSubExpr(D.ArrayOrRange.Index + 1);
4222}
4223
4224Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
4225 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4226, __PRETTY_FUNCTION__))
4226 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4226, __PRETTY_FUNCTION__))
;
4227 return getSubExpr(D.ArrayOrRange.Index + 1);
4228}
4229
4230Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
4231 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4232, __PRETTY_FUNCTION__))
4232 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4232, __PRETTY_FUNCTION__))
;
4233 return getSubExpr(D.ArrayOrRange.Index + 2);
4234}
4235
4236/// Replaces the designator at index @p Idx with the series
4237/// of designators in [First, Last).
4238void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
4239 const Designator *First,
4240 const Designator *Last) {
4241 unsigned NumNewDesignators = Last - First;
4242 if (NumNewDesignators == 0) {
4243 std::copy_backward(Designators + Idx + 1,
4244 Designators + NumDesignators,
4245 Designators + Idx);
4246 --NumNewDesignators;
4247 return;
4248 } else if (NumNewDesignators == 1) {
4249 Designators[Idx] = *First;
4250 return;
4251 }
4252
4253 Designator *NewDesignators
4254 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
4255 std::copy(Designators, Designators + Idx, NewDesignators);
4256 std::copy(First, Last, NewDesignators + Idx);
4257 std::copy(Designators + Idx + 1, Designators + NumDesignators,
4258 NewDesignators + Idx + NumNewDesignators);
4259 Designators = NewDesignators;
4260 NumDesignators = NumDesignators - 1 + NumNewDesignators;
4261}
4262
4263DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
4264 SourceLocation lBraceLoc,
4265 Expr *baseExpr,
4266 SourceLocation rBraceLoc)
4267 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
4268 OK_Ordinary) {
4269 BaseAndUpdaterExprs[0] = baseExpr;
4270
4271 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
4272 ILE->setType(baseExpr->getType());
4273 BaseAndUpdaterExprs[1] = ILE;
4274
4275 // FIXME: this is wrong, set it correctly.
4276 setDependence(ExprDependence::None);
4277}
4278
4279SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
4280 return getBase()->getBeginLoc();
4281}
4282
4283SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
4284 return getBase()->getEndLoc();
4285}
4286
4287ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs,
4288 SourceLocation RParenLoc)
4289 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary),
4290 LParenLoc(LParenLoc), RParenLoc(RParenLoc) {
4291 ParenListExprBits.NumExprs = Exprs.size();
4292
4293 for (unsigned I = 0, N = Exprs.size(); I != N; ++I)
4294 getTrailingObjects<Stmt *>()[I] = Exprs[I];
4295 setDependence(computeDependence(this));
4296}
4297
4298ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs)
4299 : Expr(ParenListExprClass, Empty) {
4300 ParenListExprBits.NumExprs = NumExprs;
4301}
4302
4303ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx,
4304 SourceLocation LParenLoc,
4305 ArrayRef<Expr *> Exprs,
4306 SourceLocation RParenLoc) {
4307 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()),
4308 alignof(ParenListExpr));
4309 return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc);
4310}
4311
4312ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx,
4313 unsigned NumExprs) {
4314 void *Mem =
4315 Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr));
4316 return new (Mem) ParenListExpr(EmptyShell(), NumExprs);
4317}
4318
4319BinaryOperator::BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs,
4320 Opcode opc, QualType ResTy, ExprValueKind VK,
4321 ExprObjectKind OK, SourceLocation opLoc,
4322 FPOptionsOverride FPFeatures)
4323 : Expr(BinaryOperatorClass, ResTy, VK, OK) {
4324 BinaryOperatorBits.Opc = opc;
4325 assert(!isCompoundAssignmentOp() &&((!isCompoundAssignmentOp() && "Use CompoundAssignOperator for compound assignments"
) ? static_cast<void> (0) : __assert_fail ("!isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4326, __PRETTY_FUNCTION__))
4326 "Use CompoundAssignOperator for compound assignments")((!isCompoundAssignmentOp() && "Use CompoundAssignOperator for compound assignments"
) ? static_cast<void> (0) : __assert_fail ("!isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4326, __PRETTY_FUNCTION__))
;
4327 BinaryOperatorBits.OpLoc = opLoc;
4328 SubExprs[LHS] = lhs;
4329 SubExprs[RHS] = rhs;
4330 BinaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
4331 if (hasStoredFPFeatures())
4332 setStoredFPFeatures(FPFeatures);
4333 setDependence(computeDependence(this));
4334}
4335
4336BinaryOperator::BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs,
4337 Opcode opc, QualType ResTy, ExprValueKind VK,
4338 ExprObjectKind OK, SourceLocation opLoc,
4339 FPOptionsOverride FPFeatures, bool dead2)
4340 : Expr(CompoundAssignOperatorClass, ResTy, VK, OK) {
4341 BinaryOperatorBits.Opc = opc;
4342 assert(isCompoundAssignmentOp() &&((isCompoundAssignmentOp() && "Use CompoundAssignOperator for compound assignments"
) ? static_cast<void> (0) : __assert_fail ("isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4343, __PRETTY_FUNCTION__))
4343 "Use CompoundAssignOperator for compound assignments")((isCompoundAssignmentOp() && "Use CompoundAssignOperator for compound assignments"
) ? static_cast<void> (0) : __assert_fail ("isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4343, __PRETTY_FUNCTION__))
;
4344 BinaryOperatorBits.OpLoc = opLoc;
4345 SubExprs[LHS] = lhs;
4346 SubExprs[RHS] = rhs;
4347 BinaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
4348 if (hasStoredFPFeatures())
4349 setStoredFPFeatures(FPFeatures);
4350 setDependence(computeDependence(this));
4351}
4352
4353BinaryOperator *BinaryOperator::CreateEmpty(const ASTContext &C,
4354 bool HasFPFeatures) {
4355 unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
4356 void *Mem =
4357 C.Allocate(sizeof(BinaryOperator) + Extra, alignof(BinaryOperator));
4358 return new (Mem) BinaryOperator(EmptyShell());
4359}
4360
4361BinaryOperator *BinaryOperator::Create(const ASTContext &C, Expr *lhs,
4362 Expr *rhs, Opcode opc, QualType ResTy,
4363 ExprValueKind VK, ExprObjectKind OK,
4364 SourceLocation opLoc,
4365 FPOptionsOverride FPFeatures) {
4366 bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
4367 unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
4368 void *Mem =
4369 C.Allocate(sizeof(BinaryOperator) + Extra, alignof(BinaryOperator));
4370 return new (Mem)
4371 BinaryOperator(C, lhs, rhs, opc, ResTy, VK, OK, opLoc, FPFeatures);
4372}
4373
4374CompoundAssignOperator *
4375CompoundAssignOperator::CreateEmpty(const ASTContext &C, bool HasFPFeatures) {
4376 unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
4377 void *Mem = C.Allocate(sizeof(CompoundAssignOperator) + Extra,
4378 alignof(CompoundAssignOperator));
4379 return new (Mem) CompoundAssignOperator(C, EmptyShell(), HasFPFeatures);
4380}
4381
4382CompoundAssignOperator *
4383CompoundAssignOperator::Create(const ASTContext &C, Expr *lhs, Expr *rhs,
4384 Opcode opc, QualType ResTy, ExprValueKind VK,
4385 ExprObjectKind OK, SourceLocation opLoc,
4386 FPOptionsOverride FPFeatures,
4387 QualType CompLHSType, QualType CompResultType) {
4388 bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
4389 unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
4390 void *Mem = C.Allocate(sizeof(CompoundAssignOperator) + Extra,
4391 alignof(CompoundAssignOperator));
4392 return new (Mem)
4393 CompoundAssignOperator(C, lhs, rhs, opc, ResTy, VK, OK, opLoc, FPFeatures,
4394 CompLHSType, CompResultType);
4395}
4396
4397UnaryOperator *UnaryOperator::CreateEmpty(const ASTContext &C,
4398 bool hasFPFeatures) {
4399 void *Mem = C.Allocate(totalSizeToAlloc<FPOptionsOverride>(hasFPFeatures),
4400 alignof(UnaryOperator));
4401 return new (Mem) UnaryOperator(hasFPFeatures, EmptyShell());
4402}
4403
4404UnaryOperator::UnaryOperator(const ASTContext &Ctx, Expr *input, Opcode opc,
4405 QualType type, ExprValueKind VK, ExprObjectKind OK,
4406 SourceLocation l, bool CanOverflow,
4407 FPOptionsOverride FPFeatures)
4408 : Expr(UnaryOperatorClass, type, VK, OK), Val(input) {
4409 UnaryOperatorBits.Opc = opc;
4410 UnaryOperatorBits.CanOverflow = CanOverflow;
4411 UnaryOperatorBits.Loc = l;
4412 UnaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
4413 if (hasStoredFPFeatures())
4414 setStoredFPFeatures(FPFeatures);
4415 setDependence(computeDependence(this));
4416}
4417
4418UnaryOperator *UnaryOperator::Create(const ASTContext &C, Expr *input,
4419 Opcode opc, QualType type,
4420 ExprValueKind VK, ExprObjectKind OK,
4421 SourceLocation l, bool CanOverflow,
4422 FPOptionsOverride FPFeatures) {
4423 bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
4424 unsigned Size = totalSizeToAlloc<FPOptionsOverride>(HasFPFeatures);
4425 void *Mem = C.Allocate(Size, alignof(UnaryOperator));
4426 return new (Mem)
4427 UnaryOperator(C, input, opc, type, VK, OK, l, CanOverflow, FPFeatures);
4428}
4429
4430const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
4431 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
4432 e = ewc->getSubExpr();
4433 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
4434 e = m->getSubExpr();
4435 e = cast<CXXConstructExpr>(e)->getArg(0);
4436 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
4437 e = ice->getSubExpr();
4438 return cast<OpaqueValueExpr>(e);
4439}
4440
4441PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
4442 EmptyShell sh,
4443 unsigned numSemanticExprs) {
4444 void *buffer =
4445 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
4446 alignof(PseudoObjectExpr));
4447 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4448}
4449
4450PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
4451 : Expr(PseudoObjectExprClass, shell) {
4452 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4453}
4454
4455PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4456 ArrayRef<Expr*> semantics,
4457 unsigned resultIndex) {
4458 assert(syntax && "no syntactic expression!")((syntax && "no syntactic expression!") ? static_cast
<void> (0) : __assert_fail ("syntax && \"no syntactic expression!\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4458, __PRETTY_FUNCTION__))
;
4459 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4459, __PRETTY_FUNCTION__))
;
4460
4461 QualType type;
4462 ExprValueKind VK;
4463 if (resultIndex == NoResult) {
4464 type = C.VoidTy;
4465 VK = VK_RValue;
4466 } else {
4467 assert(resultIndex < semantics.size())((resultIndex < semantics.size()) ? static_cast<void>
(0) : __assert_fail ("resultIndex < semantics.size()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4467, __PRETTY_FUNCTION__))
;
4468 type = semantics[resultIndex]->getType();
4469 VK = semantics[resultIndex]->getValueKind();
4470 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4470, __PRETTY_FUNCTION__))
;
4471 }
4472
4473 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
4474 alignof(PseudoObjectExpr));
4475 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4476 resultIndex);
4477}
4478
4479PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4480 Expr *syntax, ArrayRef<Expr *> semantics,
4481 unsigned resultIndex)
4482 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary) {
4483 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4484 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4485
4486 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4487 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4488 getSubExprsBuffer()[i] = E;
4489
4490 if (isa<OpaqueValueExpr>(E))
4491 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4493, __PRETTY_FUNCTION__))
4492 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4493, __PRETTY_FUNCTION__))
4493 "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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4493, __PRETTY_FUNCTION__))
;
4494 }
4495
4496 setDependence(computeDependence(this));
4497}
4498
4499//===----------------------------------------------------------------------===//
4500// Child Iterators for iterating over subexpressions/substatements
4501//===----------------------------------------------------------------------===//
4502
4503// UnaryExprOrTypeTraitExpr
4504Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4505 const_child_range CCR =
4506 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4507 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4508}
4509
4510Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
4511 // If this is of a type and the type is a VLA type (and not a typedef), the
4512 // size expression of the VLA needs to be treated as an executable expression.
4513 // Why isn't this weirdness documented better in StmtIterator?
4514 if (isArgumentType()) {
4515 if (const VariableArrayType *T =
4516 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4517 return const_child_range(const_child_iterator(T), const_child_iterator());
4518 return const_child_range(const_child_iterator(), const_child_iterator());
4519 }
4520 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4521}
4522
4523AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr *> args, QualType t,
4524 AtomicOp op, SourceLocation RP)
4525 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary),
4526 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op) {
4527 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-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4527, __PRETTY_FUNCTION__))
;
4528 for (unsigned i = 0; i != args.size(); i++)
4529 SubExprs[i] = args[i];
4530 setDependence(computeDependence(this));
4531}
4532
4533unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4534 switch (Op) {
4535 case AO__c11_atomic_init:
4536 case AO__opencl_atomic_init:
4537 case AO__c11_atomic_load:
4538 case AO__atomic_load_n:
4539 return 2;
4540
4541 case AO__opencl_atomic_load:
4542 case AO__c11_atomic_store:
4543 case AO__c11_atomic_exchange:
4544 case AO__atomic_load:
4545 case AO__atomic_store:
4546 case AO__atomic_store_n:
4547 case AO__atomic_exchange_n:
4548 case AO__c11_atomic_fetch_add:
4549 case AO__c11_atomic_fetch_sub:
4550 case AO__c11_atomic_fetch_and:
4551 case AO__c11_atomic_fetch_or:
4552 case AO__c11_atomic_fetch_xor:
4553 case AO__c11_atomic_fetch_max:
4554 case AO__c11_atomic_fetch_min:
4555 case AO__atomic_fetch_add:
4556 case AO__atomic_fetch_sub:
4557 case AO__atomic_fetch_and:
4558 case AO__atomic_fetch_or:
4559 case AO__atomic_fetch_xor:
4560 case AO__atomic_fetch_nand:
4561 case AO__atomic_add_fetch:
4562 case AO__atomic_sub_fetch:
4563 case AO__atomic_and_fetch:
4564 case AO__atomic_or_fetch:
4565 case AO__atomic_xor_fetch:
4566 case AO__atomic_nand_fetch:
4567 case AO__atomic_min_fetch:
4568 case AO__atomic_max_fetch:
4569 case AO__atomic_fetch_min:
4570 case AO__atomic_fetch_max:
4571 return 3;
4572
4573 case AO__opencl_atomic_store:
4574 case AO__opencl_atomic_exchange:
4575 case AO__opencl_atomic_fetch_add:
4576 case AO__opencl_atomic_fetch_sub:
4577 case AO__opencl_atomic_fetch_and:
4578 case AO__opencl_atomic_fetch_or:
4579 case AO__opencl_atomic_fetch_xor:
4580 case AO__opencl_atomic_fetch_min:
4581 case AO__opencl_atomic_fetch_max:
4582 case AO__atomic_exchange:
4583 return 4;
4584
4585 case AO__c11_atomic_compare_exchange_strong:
4586 case AO__c11_atomic_compare_exchange_weak:
4587 return 5;
4588
4589 case AO__opencl_atomic_compare_exchange_strong:
4590 case AO__opencl_atomic_compare_exchange_weak:
4591 case AO__atomic_compare_exchange:
4592 case AO__atomic_compare_exchange_n:
4593 return 6;
4594 }
4595 llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4595)
;
4596}
4597
4598QualType AtomicExpr::getValueType() const {
4599 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4600 if (auto AT = T->getAs<AtomicType>())
4601 return AT->getValueType();
4602 return T;
4603}
4604
4605QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
4606 unsigned ArraySectionCount = 0;
4607 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4608 Base = OASE->getBase();
4609 ++ArraySectionCount;
4610 }
4611 while (auto *ASE =
4612 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
4613 Base = ASE->getBase();
4614 ++ArraySectionCount;
4615 }
4616 Base = Base->IgnoreParenImpCasts();
4617 auto OriginalTy = Base->getType();
4618 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4619 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4620 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4621
4622 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4623 if (OriginalTy->isAnyPointerType())
4624 OriginalTy = OriginalTy->getPointeeType();
4625 else {
4626 assert (OriginalTy->isArrayType())((OriginalTy->isArrayType()) ? static_cast<void> (0)
: __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4626, __PRETTY_FUNCTION__))
;
4627 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
4628 }
4629 }
4630 return OriginalTy;
4631}
4632
4633RecoveryExpr::RecoveryExpr(ASTContext &Ctx, QualType T, SourceLocation BeginLoc,
4634 SourceLocation EndLoc, ArrayRef<Expr *> SubExprs)
4635 : Expr(RecoveryExprClass, T.getNonReferenceType(),
4636 T->isDependentType() ? VK_LValue : getValueKindForType(T),
4637 OK_Ordinary),
4638 BeginLoc(BeginLoc), EndLoc(EndLoc), NumExprs(SubExprs.size()) {
4639 assert(!T.isNull())((!T.isNull()) ? static_cast<void> (0) : __assert_fail (
"!T.isNull()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4639, __PRETTY_FUNCTION__))
;
4640 assert(llvm::all_of(SubExprs, [](Expr* E) { return E != nullptr; }))((llvm::all_of(SubExprs, [](Expr* E) { return E != nullptr; }
)) ? static_cast<void> (0) : __assert_fail ("llvm::all_of(SubExprs, [](Expr* E) { return E != nullptr; })"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4640, __PRETTY_FUNCTION__))
;
4641
4642 llvm::copy(SubExprs, getTrailingObjects<Expr *>());
4643 setDependence(computeDependence(this));
4644}
4645
4646RecoveryExpr *RecoveryExpr::Create(ASTContext &Ctx, QualType T,
4647 SourceLocation BeginLoc,
4648 SourceLocation EndLoc,
4649 ArrayRef<Expr *> SubExprs) {
4650 void *Mem = Ctx.Allocate(totalSizeToAlloc<Expr *>(SubExprs.size()),
4651 alignof(RecoveryExpr));
4652 return new (Mem) RecoveryExpr(Ctx, T, BeginLoc, EndLoc, SubExprs);
4653}
4654
4655RecoveryExpr *RecoveryExpr::CreateEmpty(ASTContext &Ctx, unsigned NumSubExprs) {
4656 void *Mem = Ctx.Allocate(totalSizeToAlloc<Expr *>(NumSubExprs),
4657 alignof(RecoveryExpr));
4658 return new (Mem) RecoveryExpr(EmptyShell(), NumSubExprs);
4659}
4660
4661void OMPArrayShapingExpr::setDimensions(ArrayRef<Expr *> Dims) {
4662 assert(((NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4664, __PRETTY_FUNCTION__))
4663 NumDims == Dims.size() &&((NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4664, __PRETTY_FUNCTION__))
4664 "Preallocated number of dimensions is different from the provided one.")((NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4664, __PRETTY_FUNCTION__))
;
4665 llvm::copy(Dims, getTrailingObjects<Expr *>());
4666}
4667
4668void OMPArrayShapingExpr::setBracketsRanges(ArrayRef<SourceRange> BR) {
4669 assert(((NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4671, __PRETTY_FUNCTION__))
4670 NumDims == BR.size() &&((NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4671, __PRETTY_FUNCTION__))
4671 "Preallocated number of dimensions is different from the provided one.")((NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? static_cast<void> (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4671, __PRETTY_FUNCTION__))
;
4672 llvm::copy(BR, getTrailingObjects<SourceRange>());
4673}
4674
4675OMPArrayShapingExpr::OMPArrayShapingExpr(QualType ExprTy, Expr *Op,
4676 SourceLocation L, SourceLocation R,
4677 ArrayRef<Expr *> Dims)
4678 : Expr(OMPArrayShapingExprClass, ExprTy, VK_LValue, OK_Ordinary), LPLoc(L),
4679 RPLoc(R), NumDims(Dims.size()) {
4680 setBase(Op);
4681 setDimensions(Dims);
4682 setDependence(computeDependence(this));
4683}
4684
4685OMPArrayShapingExpr *
4686OMPArrayShapingExpr::Create(const ASTContext &Context, QualType T, Expr *Op,
4687 SourceLocation L, SourceLocation R,
4688 ArrayRef<Expr *> Dims,
4689 ArrayRef<SourceRange> BracketRanges) {
4690 assert(Dims.size() == BracketRanges.size() &&((Dims.size() == BracketRanges.size() && "Different number of dimensions and brackets ranges."
) ? static_cast<void> (0) : __assert_fail ("Dims.size() == BracketRanges.size() && \"Different number of dimensions and brackets ranges.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4691, __PRETTY_FUNCTION__))
4691 "Different number of dimensions and brackets ranges.")((Dims.size() == BracketRanges.size() && "Different number of dimensions and brackets ranges."
) ? static_cast<void> (0) : __assert_fail ("Dims.size() == BracketRanges.size() && \"Different number of dimensions and brackets ranges.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4691, __PRETTY_FUNCTION__))
;
4692 void *Mem = Context.Allocate(
4693 totalSizeToAlloc<Expr *, SourceRange>(Dims.size() + 1, Dims.size()),
4694 alignof(OMPArrayShapingExpr));
4695 auto *E = new (Mem) OMPArrayShapingExpr(T, Op, L, R, Dims);
4696 E->setBracketsRanges(BracketRanges);
4697 return E;
4698}
4699
4700OMPArrayShapingExpr *OMPArrayShapingExpr::CreateEmpty(const ASTContext &Context,
4701 unsigned NumDims) {
4702 void *Mem = Context.Allocate(
4703 totalSizeToAlloc<Expr *, SourceRange>(NumDims + 1, NumDims),
4704 alignof(OMPArrayShapingExpr));
4705 return new (Mem) OMPArrayShapingExpr(EmptyShell(), NumDims);
4706}
4707
4708void OMPIteratorExpr::setIteratorDeclaration(unsigned I, Decl *D) {
4709 assert(I < NumIterators &&((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4710, __PRETTY_FUNCTION__))
4710 "Idx is greater or equal the number of iterators definitions.")((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4710, __PRETTY_FUNCTION__))
;
4711 getTrailingObjects<Decl *>()[I] = D;
4712}
4713
4714void OMPIteratorExpr::setAssignmentLoc(unsigned I, SourceLocation Loc) {
4715 assert(I < NumIterators &&((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4716, __PRETTY_FUNCTION__))
4716 "Idx is greater or equal the number of iterators definitions.")((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4716, __PRETTY_FUNCTION__))
;
4717 getTrailingObjects<
4718 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4719 static_cast<int>(RangeLocOffset::AssignLoc)] = Loc;
4720}
4721
4722void OMPIteratorExpr::setIteratorRange(unsigned I, Expr *Begin,
4723 SourceLocation ColonLoc, Expr *End,
4724 SourceLocation SecondColonLoc,
4725 Expr *Step) {
4726 assert(I < NumIterators &&((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4727, __PRETTY_FUNCTION__))
4727 "Idx is greater or equal the number of iterators definitions.")((I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? static_cast<void> (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4727, __PRETTY_FUNCTION__))
;
4728 getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
4729 static_cast<int>(RangeExprOffset::Begin)] =
4730 Begin;
4731 getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
4732 static_cast<int>(RangeExprOffset::End)] = End;
4733 getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
4734 static_cast<int>(RangeExprOffset::Step)] = Step;
4735 getTrailingObjects<
4736 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4737 static_cast<int>(RangeLocOffset::FirstColonLoc)] =
4738 ColonLoc;
4739 getTrailingObjects<
4740 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4741 static_cast<int>(RangeLocOffset::SecondColonLoc)] =
4742 SecondColonLoc;
4743}
4744
4745Decl *OMPIteratorExpr::getIteratorDecl(unsigned I) {
4746 return getTrailingObjects<Decl *>()[I];
4747}
4748
4749OMPIteratorExpr::IteratorRange OMPIteratorExpr::getIteratorRange(unsigned I) {
4750 IteratorRange Res;
4751 Res.Begin =
4752 getTrailingObjects<Expr *>()[I * static_cast<int>(
4753 RangeExprOffset::Total) +
4754 static_cast<int>(RangeExprOffset::Begin)];
4755 Res.End =
4756 getTrailingObjects<Expr *>()[I * static_cast<int>(
4757 RangeExprOffset::Total) +
4758 static_cast<int>(RangeExprOffset::End)];
4759 Res.Step =
4760 getTrailingObjects<Expr *>()[I * static_cast<int>(
4761 RangeExprOffset::Total) +
4762 static_cast<int>(RangeExprOffset::Step)];
4763 return Res;
4764}
4765
4766SourceLocation OMPIteratorExpr::getAssignLoc(unsigned I) const {
4767 return getTrailingObjects<
4768 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4769 static_cast<int>(RangeLocOffset::AssignLoc)];
4770}
4771
4772SourceLocation OMPIteratorExpr::getColonLoc(unsigned I) const {
4773 return getTrailingObjects<
4774 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4775 static_cast<int>(RangeLocOffset::FirstColonLoc)];
4776}
4777
4778SourceLocation OMPIteratorExpr::getSecondColonLoc(unsigned I) const {
4779 return getTrailingObjects<
4780 SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
4781 static_cast<int>(RangeLocOffset::SecondColonLoc)];
4782}
4783
4784void OMPIteratorExpr::setHelper(unsigned I, const OMPIteratorHelperData &D) {
4785 getTrailingObjects<OMPIteratorHelperData>()[I] = D;
4786}
4787
4788OMPIteratorHelperData &OMPIteratorExpr::getHelper(unsigned I) {
4789 return getTrailingObjects<OMPIteratorHelperData>()[I];
4790}
4791
4792const OMPIteratorHelperData &OMPIteratorExpr::getHelper(unsigned I) const {
4793 return getTrailingObjects<OMPIteratorHelperData>()[I];
4794}
4795
4796OMPIteratorExpr::OMPIteratorExpr(
4797 QualType ExprTy, SourceLocation IteratorKwLoc, SourceLocation L,
4798 SourceLocation R, ArrayRef<OMPIteratorExpr::IteratorDefinition> Data,
4799 ArrayRef<OMPIteratorHelperData> Helpers)
4800 : Expr(OMPIteratorExprClass, ExprTy, VK_LValue, OK_Ordinary),
4801 IteratorKwLoc(IteratorKwLoc), LPLoc(L), RPLoc(R),
4802 NumIterators(Data.size()) {
4803 for (unsigned I = 0, E = Data.size(); I < E; ++I) {
4804 const IteratorDefinition &D = Data[I];
4805 setIteratorDeclaration(I, D.IteratorDecl);
4806 setAssignmentLoc(I, D.AssignmentLoc);
4807 setIteratorRange(I, D.Range.Begin, D.ColonLoc, D.Range.End,
4808 D.SecondColonLoc, D.Range.Step);
4809 setHelper(I, Helpers[I]);
4810 }
4811 setDependence(computeDependence(this));
4812}
4813
4814OMPIteratorExpr *
4815OMPIteratorExpr::Create(const ASTContext &Context, QualType T,
4816 SourceLocation IteratorKwLoc, SourceLocation L,
4817 SourceLocation R,
4818 ArrayRef<OMPIteratorExpr::IteratorDefinition> Data,
4819 ArrayRef<OMPIteratorHelperData> Helpers) {
4820 assert(Data.size() == Helpers.size() &&((Data.size() == Helpers.size() && "Data and helpers must have the same size."
) ? static_cast<void> (0) : __assert_fail ("Data.size() == Helpers.size() && \"Data and helpers must have the same size.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4821, __PRETTY_FUNCTION__))
4821 "Data and helpers must have the same size.")((Data.size() == Helpers.size() && "Data and helpers must have the same size."
) ? static_cast<void> (0) : __assert_fail ("Data.size() == Helpers.size() && \"Data and helpers must have the same size.\""
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/AST/Expr.cpp"
, 4821, __PRETTY_FUNCTION__))
;
4822 void *Mem = Context.Allocate(
4823 totalSizeToAlloc<Decl *, Expr *, SourceLocation, OMPIteratorHelperData>(
4824 Data.size(), Data.size() * static_cast<int>(RangeExprOffset::Total),
4825 Data.size() * static_cast<int>(RangeLocOffset::Total),
4826 Helpers.size()),
4827 alignof(OMPIteratorExpr));
4828 return new (Mem) OMPIteratorExpr(T, IteratorKwLoc, L, R, Data, Helpers);
4829}
4830
4831OMPIteratorExpr *OMPIteratorExpr::CreateEmpty(const ASTContext &Context,
4832 unsigned NumIterators) {
4833 void *Mem = Context.Allocate(
4834 totalSizeToAlloc<Decl *, Expr *, SourceLocation, OMPIteratorHelperData>(
4835 NumIterators, NumIterators * static_cast<int>(RangeExprOffset::Total),
4836 NumIterators * static_cast<int>(RangeLocOffset::Total), NumIterators),
4837 alignof(OMPIteratorExpr));
4838 return new (Mem) OMPIteratorExpr(EmptyShell(), NumIterators);
4839}

/usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_iterator.h

</
1// Iterators -*- C++ -*-
2
3// Copyright (C) 2001-2016 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/*
26 *
27 * Copyright (c) 1994
28 * Hewlett-Packard Company
29 *
30 * Permission to use, copy, modify, distribute and sell this software
31 * and its documentation for any purpose is hereby granted without fee,
32 * provided that the above copyright notice appear in all copies and
33 * that both that copyright notice and this permission notice appear
34 * in supporting documentation. Hewlett-Packard Company makes no
35 * representations about the suitability of this software for any
36 * purpose. It is provided "as is" without express or implied warranty.
37 *
38 *
39 * Copyright (c) 1996-1998
40 * Silicon Graphics Computer Systems, Inc.
41 *
42 * Permission to use, copy, modify, distribute and sell this software
43 * and its documentation for any purpose is hereby granted without fee,
44 * provided that the above copyright notice appear in all copies and
45 * that both that copyright notice and this permission notice appear
46 * in supporting documentation. Silicon Graphics makes no
47 * representations about the suitability of this software for any
48 * purpose. It is provided "as is" without express or implied warranty.
49 */
50
51/** @file bits/stl_iterator.h
52 * This is an internal header file, included by other library headers.
53 * Do not attempt to use it directly. @headername{iterator}
54 *
55 * This file implements reverse_iterator, back_insert_iterator,
56 * front_insert_iterator, insert_iterator, __normal_iterator, and their
57 * supporting functions and overloaded operators.
58 */
59
60#ifndef _STL_ITERATOR_H1
61#define _STL_ITERATOR_H1 1
62
63#include <bits/cpp_type_traits.h>
64#include <ext/type_traits.h>
65#include <bits/move.h>
66#include <bits/ptr_traits.h>
67
68namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
69{
70_GLIBCXX_BEGIN_NAMESPACE_VERSION
71
72 /**
73 * @addtogroup iterators
74 * @{
75 */
76
77 // 24.4.1 Reverse iterators
78 /**
79 * Bidirectional and random access iterators have corresponding reverse
80 * %iterator adaptors that iterate through the data structure in the
81 * opposite direction. They have the same signatures as the corresponding
82 * iterators. The fundamental relation between a reverse %iterator and its
83 * corresponding %iterator @c i is established by the identity:
84 * @code
85 * &*(reverse_iterator(i)) == &*(i - 1)
86 * @endcode
87 *
88 * <em>This mapping is dictated by the fact that while there is always a
89 * pointer past the end of an array, there might not be a valid pointer
90 * before the beginning of an array.</em> [24.4.1]/1,2
91 *
92 * Reverse iterators can be tricky and surprising at first. Their
93 * semantics make sense, however, and the trickiness is a side effect of
94 * the requirement that the iterators must be safe.
95 */
96 template<typename _Iterator>
97 class reverse_iterator
98 : public iterator<typename iterator_traits<_Iterator>::iterator_category,
99 typename iterator_traits<_Iterator>::value_type,
100 typename iterator_traits<_Iterator>::difference_type,
101 typename iterator_traits<_Iterator>::pointer,
102 typename iterator_traits<_Iterator>::reference>
103 {
104 protected:
105 _Iterator current;
106
107 typedef iterator_traits<_Iterator> __traits_type;
108
109 public:
110 typedef _Iterator iterator_type;
111 typedef typename __traits_type::difference_type difference_type;
112 typedef typename __traits_type::pointer pointer;
113 typedef typename __traits_type::reference reference;
114
115 /**
116 * The default constructor value-initializes member @p current.
117 * If it is a pointer, that means it is zero-initialized.
118 */
119 // _GLIBCXX_RESOLVE_LIB_DEFECTS
120 // 235 No specification of default ctor for reverse_iterator
121 reverse_iterator() : current() { }
122
123 /**
124 * This %iterator will move in the opposite direction that @p x does.
125 */
126 explicit
127 reverse_iterator(iterator_type __x) : current(__x) { }
128
129 /**
130 * The copy constructor is normal.
131 */
132 reverse_iterator(const reverse_iterator& __x)
133 : current(__x.current) { }
134
135 /**
136 * A %reverse_iterator across other types can be copied if the
137 * underlying %iterator can be converted to the type of @c current.
138 */
139 template<typename _Iter>
140 reverse_iterator(const reverse_iterator<_Iter>& __x)
141 : current(__x.base()) { }
142
143 /**
144 * @return @c current, the %iterator used for underlying work.
145 */
146 iterator_type
147 base() const
148 { return current; }
149
150 /**
151 * @return A reference to the value at @c --current
152 *
153 * This requires that @c --current is dereferenceable.
154 *
155 * @warning This implementation requires that for an iterator of the
156 * underlying iterator type, @c x, a reference obtained by
157 * @c *x remains valid after @c x has been modified or
158 * destroyed. This is a bug: http://gcc.gnu.org/PR51823
159 */
160 reference
161 operator*() const
162 {
163 _Iterator __tmp = current;
164 return *--__tmp;
165 }
166
167 /**
168 * @return A pointer to the value at @c --current
169 *
170 * This requires that @c --current is dereferenceable.
171 */
172 pointer
173 operator->() const
174 { return &(operator*()); }
175
176 /**
177 * @return @c *this
178 *
179 * Decrements the underlying iterator.
180 */
181 reverse_iterator&
182 operator++()
183 {
184 --current;
185 return *this;
186 }
187
188 /**
189 * @return The original value of @c *this
190 *
191 * Decrements the underlying iterator.
192 */
193 reverse_iterator
194 operator++(int)
195 {
196 reverse_iterator __tmp = *this;
197 --current;
198 return __tmp;
199 }
200
201 /**
202 * @return @c *this
203 *
204 * Increments the underlying iterator.
205 */
206 reverse_iterator&
207 operator--()
208 {
209 ++current;
210 return *this;
211 }
212
213 /**
214 * @return A reverse_iterator with the previous value of @c *this
215 *
216 * Increments the underlying iterator.
217 */
218 reverse_iterator
219 operator--(int)
220 {
221 reverse_iterator __tmp = *this;
222 ++current;
223 return __tmp;
224 }
225
226 /**
227 * @return A reverse_iterator that refers to @c current - @a __n
228 *
229 * The underlying iterator must be a Random Access Iterator.
230 */
231 reverse_iterator
232 operator+(difference_type __n) const
233 { return reverse_iterator(current - __n); }
234
235 /**
236 * @return *this
237 *
238 * Moves the underlying iterator backwards @a __n steps.
239 * The underlying iterator must be a Random Access Iterator.
240 */
241 reverse_iterator&
242 operator+=(difference_type __n)
243 {
244 current -= __n;
245 return *this;
246 }
247
248 /**
249 * @return A reverse_iterator that refers to @c current - @a __n
250 *
251 * The underlying iterator must be a Random Access Iterator.
252 */
253 reverse_iterator
254 operator-(difference_type __n) const
255 { return reverse_iterator(current + __n); }
256
257 /**
258 * @return *this
259 *
260 * Moves the underlying iterator forwards @a __n steps.
261 * The underlying iterator must be a Random Access Iterator.
262 */
263 reverse_iterator&
264 operator-=(difference_type __n)
265 {
266 current += __n;
267 return *this;
268 }
269
270 /**
271 * @return The value at @c current - @a __n - 1
272 *
273 * The underlying iterator must be a Random Access Iterator.
274 */
275 reference
276 operator[](difference_type __n) const
277 { return *(*this + __n); }
278 };
279
280 //@{
281 /**
282 * @param __x A %reverse_iterator.
283 * @param __y A %reverse_iterator.
284 * @return A simple bool.
285 *
286 * Reverse iterators forward many operations to their underlying base()
287 * iterators. Others are implemented in terms of one another.
288 *
289 */
290 template<typename _Iterator>
291 inline bool
292 operator==(const reverse_iterator<_Iterator>& __x,
293 const reverse_iterator<_Iterator>& __y)
294 { return __x.base() == __y.base(); }
23
Assuming the condition is true
24
Returning the value 1, which participates in a condition later
295
296 template<typename _Iterator>
297 inline bool
298 operator<(const reverse_iterator<_Iterator>& __x,
299 const reverse_iterator<_Iterator>& __y)
300 { return __y.base() < __x.base(); }
301
302 template<typename _Iterator>
303 inline bool
304 operator!=(const reverse_iterator<_Iterator>& __x,
305 const reverse_iterator<_Iterator>& __y)
306 { return !(__x == __y); }
22
Calling 'operator==<const clang::ClassTemplateSpecializationDecl **>'
25
Returning from 'operator==<const clang::ClassTemplateSpecializationDecl **>'
26
Returning zero, which participates in a condition later
307
308 template<typename _Iterator>
309 inline bool
310 operator>(const reverse_iterator<_Iterator>& __x,
311 const reverse_iterator<_Iterator>& __y)
312 { return __y < __x; }
313
314 template<typename _Iterator>
315 inline bool
316 operator<=(const reverse_iterator<_Iterator>& __x,
317 const reverse_iterator<_Iterator>& __y)
318 { return !(__y < __x); }
319
320 template<typename _Iterator>
321 inline bool
322 operator>=(const reverse_iterator<_Iterator>& __x,
323 const reverse_iterator<_Iterator>& __y)
324 { return !(__x < __y); }
325
326 template<typename _Iterator>
327#if __cplusplus201402L < 201103L
328 inline typename reverse_iterator<_Iterator>::difference_type
329 operator-(const reverse_iterator<_Iterator>& __x,
330 const reverse_iterator<_Iterator>& __y)
331#else
332 inline auto
333 operator-(const reverse_iterator<_Iterator>& __x,
334 const reverse_iterator<_Iterator>& __y)
335 -> decltype(__x.base() - __y.base())
336#endif
337 { return __y.base() - __x.base(); }
338
339 template<typename _Iterator>
340 inline reverse_iterator<_Iterator>
341 operator+(typename reverse_iterator<_Iterator>::difference_type __n,
342 const reverse_iterator<_Iterator>& __x)
343 { return reverse_iterator<_Iterator>(__x.base() - __n); }
344
345 // _GLIBCXX_RESOLVE_LIB_DEFECTS
346 // DR 280. Comparison of reverse_iterator to const reverse_iterator.
347 template<typename _IteratorL, typename _IteratorR>
348 inline bool
349 operator==(const reverse_iterator<_IteratorL>& __x,
350 const reverse_iterator<_IteratorR>& __y)
351 { return __x.base() == __y.base(); }
352
353 template<typename _IteratorL, typename _IteratorR>
354 inline bool
355 operator<(const reverse_iterator<_IteratorL>& __x,
356 const reverse_iterator<_IteratorR>& __y)
357 { return __y.base() < __x.base(); }
358
359 template<typename _IteratorL, typename _IteratorR>
360 inline bool
361 operator!=(const reverse_iterator<_IteratorL>& __x,
362 const reverse_iterator<_IteratorR>& __y)
363 { return !(__x == __y); }
364
365 template<typename _IteratorL, typename _IteratorR>
366 inline bool
367 operator>(const reverse_iterator<_IteratorL>& __x,
368 const reverse_iterator<_IteratorR>& __y)
369 { return __y < __x; }
370
371 template<typename _IteratorL, typename _IteratorR>
372 inline bool
373 operator<=(const reverse_iterator<_IteratorL>& __x,
374 const reverse_iterator<_IteratorR>& __y)
375 { return !(__y < __x); }
376
377 template<typename _IteratorL, typename _IteratorR>
378 inline bool
379 operator>=(const reverse_iterator<_IteratorL>& __x,
380 const reverse_iterator<_IteratorR>& __y)
381 { return !(__x < __y); }
382
383 template<typename _IteratorL, typename _IteratorR>
384#if __cplusplus201402L >= 201103L
385 // DR 685.
386 inline auto
387 operator-(const reverse_iterator<_IteratorL>& __x,
388 const reverse_iterator<_IteratorR>& __y)
389 -> decltype(__y.base() - __x.base())
390#else
391 inline typename reverse_iterator<_IteratorL>::difference_type
392 operator-(const reverse_iterator<_IteratorL>& __x,
393 const reverse_iterator<_IteratorR>& __y)
394#endif
395 { return __y.base() - __x.base(); }
396 //@}
397
398#if __cplusplus201402L >= 201103L
399 // Same as C++14 make_reverse_iterator but used in C++03 mode too.
400 template<typename _Iterator>
401 inline reverse_iterator<_Iterator>
402 __make_reverse_iterator(_Iterator __i)
403 { return reverse_iterator<_Iterator>(__i); }
404
405# if __cplusplus201402L > 201103L
406# define __cpp_lib_make_reverse_iterator201402 201402
407
408 // _GLIBCXX_RESOLVE_LIB_DEFECTS
409 // DR 2285. make_reverse_iterator
410 /// Generator function for reverse_iterator.
411 template<typename _Iterator>
412 inline reverse_iterator<_Iterator>
413 make_reverse_iterator(_Iterator __i)
414 { return reverse_iterator<_Iterator>(__i); }
415# endif
416#endif
417
418#if __cplusplus201402L >= 201103L
419 template<typename _Iterator>
420 auto
421 __niter_base(reverse_iterator<_Iterator> __it)
422 -> decltype(__make_reverse_iterator(__niter_base(__it.base())))
423 { return __make_reverse_iterator(__niter_base(__it.base())); }
424
425 template<typename _Iterator>
426 struct __is_move_iterator<reverse_iterator<_Iterator> >
427 : __is_move_iterator<_Iterator>
428 { };
429
430 template<typename _Iterator>
431 auto
432 __miter_base(reverse_iterator<_Iterator> __it)
433 -> decltype(__make_reverse_iterator(__miter_base(__it.base())))
434 { return __make_reverse_iterator(__miter_base(__it.base())); }
435#endif
436
437 // 24.4.2.2.1 back_insert_iterator
438 /**
439 * @brief Turns assignment into insertion.
440 *
441 * These are output iterators, constructed from a container-of-T.
442 * Assigning a T to the iterator appends it to the container using
443 * push_back.
444 *
445 * Tip: Using the back_inserter function to create these iterators can
446 * save typing.
447 */
448 template<typename _Container>
449 class back_insert_iterator
450 : public iterator<output_iterator_tag, void, void, void, void>
451 {
452 protected:
453 _Container* container;
454
455 public:
456 /// A nested typedef for the type of whatever container you used.
457 typedef _Container container_type;
458
459 /// The only way to create this %iterator is with a container.
460 explicit
461 back_insert_iterator(_Container& __x)
462 : container(std::__addressof(__x)) { }
463
464 /**
465 * @param __value An instance of whatever type
466 * container_type::const_reference is; presumably a
467 * reference-to-const T for container<T>.
468 * @return This %iterator, for chained operations.
469 *
470 * This kind of %iterator doesn't really have a @a position in the
471 * container (you can think of the position as being permanently at
472 * the end, if you like). Assigning a value to the %iterator will
473 * always append the value to the end of the container.
474 */
475#if __cplusplus201402L < 201103L
476 back_insert_iterator&
477 operator=(typename _Container::const_reference __value)
478 {
479 container->push_back(__value);
480 return *this;
481 }
482#else
483 back_insert_iterator&
484 operator=(const typename _Container::value_type& __value)
485 {
486 container->push_back(__value);
487 return *this;
488 }
489
490 back_insert_iterator&
491 operator=(typename _Container::value_type&& __value)
492 {
493 container->push_back(std::move(__value));
494 return *this;
495 }
496#endif
497
498 /// Simply returns *this.
499 back_insert_iterator&
500 operator*()
501 { return *this; }
502
503 /// Simply returns *this. (This %iterator does not @a move.)
504 back_insert_iterator&
505 operator++()
506 { return *this; }
507
508 /// Simply returns *this. (This %iterator does not @a move.)
509 back_insert_iterator
510 operator++(int)
511 { return *this; }
512 };
513
514 /**
515 * @param __x A container of arbitrary type.
516 * @return An instance of back_insert_iterator working on @p __x.
517 *
518 * This wrapper function helps in creating back_insert_iterator instances.
519 * Typing the name of the %iterator requires knowing the precise full
520 * type of the container, which can be tedious and impedes generic
521 * programming. Using this function lets you take advantage of automatic
522 * template parameter deduction, making the compiler match the correct
523 * types for you.
524 */
525 template<typename _Container>
526 inline back_insert_iterator<_Container>
527 back_inserter(_Container& __x)
528 { return back_insert_iterator<_Container>(__x); }
529
530 /**
531 * @brief Turns assignment into insertion.
532 *
533 * These are output iterators, constructed from a container-of-T.
534 * Assigning a T to the iterator prepends it to the container using
535 * push_front.
536 *
537 * Tip: Using the front_inserter function to create these iterators can
538 * save typing.
539 */
540 template<typename _Container>
541 class front_insert_iterator
542 : public iterator<output_iterator_tag, void, void, void, void>
543 {
544 protected:
545 _Container* container;
546
547 public:
548 /// A nested typedef for the type of whatever container you used.
549 typedef _Container container_type;
550
551 /// The only way to create this %iterator is with a container.
552 explicit front_insert_iterator(_Container& __x)
553 : container(std::__addressof(__x)) { }
554
555 /**
556 * @param __value An instance of whatever type
557 * container_type::const_reference is; presumably a
558 * reference-to-const T for container<T>.
559 * @return This %iterator, for chained operations.
560 *
561 * This kind of %iterator doesn't really have a @a position in the
562 * container (you can think of the position as being permanently at
563 * the front, if you like). Assigning a value to the %iterator will
564 * always prepend the value to the front of the container.
565 */
566#if __cplusplus201402L < 201103L
567 front_insert_iterator&
568 operator=(typename _Container::const_reference __value)
569 {
570 container->push_front(__value);
571 return *this;
572 }
573#else
574 front_insert_iterator&
575 operator=(const typename _Container::value_type& __value)
576 {
577 container->push_front(__value);
578 return *this;
579 }
580
581 front_insert_iterator&
582 operator=(typename _Container::value_type&& __value)
583 {
584 container->push_front(std::move(__value));
585 return *this;
586 }
587#endif
588
589 /// Simply returns *this.
590 front_insert_iterator&
591 operator*()
592 { return *this; }
593
594 /// Simply returns *this. (This %iterator does not @a move.)
595 front_insert_iterator&
596 operator++()
597 { return *this; }
598
599 /// Simply returns *this. (This %iterator does not @a move.)
600 front_insert_iterator
601 operator++(int)
602 { return *this; }
603 };
604
605 /**
606 * @param __x A container of arbitrary type.
607 * @return An instance of front_insert_iterator working on @p x.
608 *
609 * This wrapper function helps in creating front_insert_iterator instances.
610 * Typing the name of the %iterator requires knowing the precise full
611 * type of the container, which can be tedious and impedes generic
612 * programming. Using this function lets you take advantage of automatic
613 * template parameter deduction, making the compiler match the correct
614 * types for you.
615 */
616 template<typename _Container>
617 inline front_insert_iterator<_Container>
618 front_inserter(_Container& __x)
619 { return front_insert_iterator<_Container>(__x); }
620
621 /**
622 * @brief Turns assignment into insertion.
623 *
624 * These are output iterators, constructed from a container-of-T.
625 * Assigning a T to the iterator inserts it in the container at the
626 * %iterator's position, rather than overwriting the value at that
627 * position.
628 *
629 * (Sequences will actually insert a @e copy of the value before the
630 * %iterator's position.)
631 *
632 * Tip: Using the inserter function to create these iterators can
633 * save typing.
634 */
635 template<typename _Container>
636 class insert_iterator
637 : public iterator<output_iterator_tag, void, void, void, void>
638 {
639 protected:
640 _Container* container;
641 typename _Container::iterator iter;
642
643 public:
644 /// A nested typedef for the type of whatever container you used.
645 typedef _Container container_type;
646
647 /**
648 * The only way to create this %iterator is with a container and an
649 * initial position (a normal %iterator into the container).
650 */
651 insert_iterator(_Container& __x, typename _Container::iterator __i)
652 : container(std::__addressof(__x)), iter(__i) {}
653
654 /**
655 * @param __value An instance of whatever type
656 * container_type::const_reference is; presumably a
657 * reference-to-const T for container<T>.
658 * @return This %iterator, for chained operations.
659 *
660 * This kind of %iterator maintains its own position in the
661 * container. Assigning a value to the %iterator will insert the
662 * value into the container at the place before the %iterator.
663 *
664 * The position is maintained such that subsequent assignments will
665 * insert values immediately after one another. For example,
666 * @code
667 * // vector v contains A and Z
668 *
669 * insert_iterator i (v, ++v.begin());
670 * i = 1;
671 * i = 2;
672 * i = 3;
673 *
674 * // vector v contains A, 1, 2, 3, and Z
675 * @endcode
676 */
677#if __cplusplus201402L < 201103L
678 insert_iterator&
679 operator=(typename _Container::const_reference __value)
680 {
681 iter = container->insert(iter, __value);
682 ++iter;
683 return *this;
684 }
685#else
686 insert_iterator&
687 operator=(const typename _Container::value_type& __value)
688 {
689 iter = container->insert(iter, __value);
690 ++iter;
691 return *this;
692 }
693
694 insert_iterator&
695 operator=(typename _Container::value_type&& __value)
696 {
697 iter = container->insert(iter, std::move(__value));
698 ++iter;
699 return *this;
700 }
701#endif
702
703 /// Simply returns *this.
704 insert_iterator&
705 operator*()
706 { return *this; }
707
708 /// Simply returns *this. (This %iterator does not @a move.)
709 insert_iterator&
710 operator++()
711 { return *this; }
712
713 /// Simply returns *this. (This %iterator does not @a move.)
714 insert_iterator&
715 operator++(int)
716 { return *this; }
717 };
718
719 /**
720 * @param __x A container of arbitrary type.
721 * @return An instance of insert_iterator working on @p __x.
722 *
723 * This wrapper function helps in creating insert_iterator instances.
724 * Typing the name of the %iterator requires knowing the precise full
725 * type of the container, which can be tedious and impedes generic
726 * programming. Using this function lets you take advantage of automatic
727 * template parameter deduction, making the compiler match the correct
728 * types for you.
729 */
730 template<typename _Container, typename _Iterator>
731 inline insert_iterator<_Container>
732 inserter(_Container& __x, _Iterator __i)
733 {
734 return insert_iterator<_Container>(__x,
735 typename _Container::iterator(__i));
736 }
737
738 // @} group iterators
739
740_GLIBCXX_END_NAMESPACE_VERSION
741} // namespace
742
743namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
744{
745_GLIBCXX_BEGIN_NAMESPACE_VERSION
746
747 // This iterator adapter is @a normal in the sense that it does not
748 // change the semantics of any of the operators of its iterator
749 // parameter. Its primary purpose is to convert an iterator that is
750 // not a class, e.g. a pointer, into an iterator that is a class.
751 // The _Container parameter exists solely so that different containers
752 // using this template can instantiate different types, even if the
753 // _Iterator parameter is the same.
754 using std::iterator_traits;
755 using std::iterator;
756 template<typename _Iterator, typename _Container>
757 class __normal_iterator
758 {
759 protected:
760 _Iterator _M_current;
761
762 typedef iterator_traits<_Iterator> __traits_type;
763
764 public:
765 typedef _Iterator iterator_type;
766 typedef typename __traits_type::iterator_category iterator_category;
767 typedef typename __traits_type::value_type value_type;
768 typedef typename __traits_type::difference_type difference_type;
769 typedef typename __traits_type::reference reference;
770 typedef typename __traits_type::pointer pointer;
771
772 _GLIBCXX_CONSTEXPRconstexpr __normal_iterator() _GLIBCXX_NOEXCEPTnoexcept
773 : _M_current(_Iterator()) { }
774
775 explicit
776 __normal_iterator(const _Iterator& __i) _GLIBCXX_NOEXCEPTnoexcept
777 : _M_current(__i) { }
778
779 // Allow iterator to const_iterator conversion
780 template<typename _Iter>
781 __normal_iterator(const __normal_iterator<_Iter,
782 typename __enable_if<
783 (std::__are_same<_Iter, typename _Container::pointer>::__value),
784 _Container>::__type>& __i) _GLIBCXX_NOEXCEPTnoexcept
785 : _M_current(__i.base()) { }
786
787 // Forward iterator requirements
788 reference
789 operator*() const _GLIBCXX_NOEXCEPTnoexcept
790 { return *_M_current; }
791
792 pointer
793 operator->() const _GLIBCXX_NOEXCEPTnoexcept
794 { return _M_current; }
795
796 __normal_iterator&
797 operator++() _GLIBCXX_NOEXCEPTnoexcept
798 {
799 ++_M_current;
800 return *this;
801 }
802
803 __normal_iterator
804 operator++(int) _GLIBCXX_NOEXCEPTnoexcept
805 { return __normal_iterator(_M_current++); }
806
807 // Bidirectional iterator requirements
808 __normal_iterator&
809 operator--() _GLIBCXX_NOEXCEPTnoexcept
810 {
811 --_M_current;