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