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Eugene Zelenkoae304b02017-11-17 18:09:48 +00001//===--- Expr.cpp - Expression AST Node Implementation --------------------===//
Chris Lattner1b926492006-08-23 06:42:10 +00002//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner5b12ab82007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chris Lattner1b926492006-08-23 06:42:10 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Expr class and subclasses.
11//
12//===----------------------------------------------------------------------===//
13
Chris Lattner5c4664e2007-07-15 23:32:58 +000014#include "clang/AST/ASTContext.h"
Benjamin Kramerea70eb32012-12-01 15:09:41 +000015#include "clang/AST/Attr.h"
Douglas Gregor9a657932008-10-21 23:43:52 +000016#include "clang/AST/DeclCXX.h"
Benjamin Kramerea70eb32012-12-01 15:09:41 +000017#include "clang/AST/DeclObjC.h"
Douglas Gregorded2d7b2009-02-04 19:02:06 +000018#include "clang/AST/DeclTemplate.h"
Douglas Gregor1be329d2012-02-23 07:33:15 +000019#include "clang/AST/EvaluatedExprVisitor.h"
Eugene Zelenkoae304b02017-11-17 18:09:48 +000020#include "clang/AST/Expr.h"
Benjamin Kramerea70eb32012-12-01 15:09:41 +000021#include "clang/AST/ExprCXX.h"
David Majnemerbed356a2013-11-06 23:31:56 +000022#include "clang/AST/Mangle.h"
Eugene Zelenkoae304b02017-11-17 18:09:48 +000023#include "clang/AST/RecordLayout.h"
24#include "clang/AST/StmtVisitor.h"
Chris Lattner15ba9492009-06-14 01:54:56 +000025#include "clang/Basic/Builtins.h"
Jordan Rosea7d03842013-02-08 22:30:41 +000026#include "clang/Basic/CharInfo.h"
Chris Lattnere925d612010-11-17 07:37:15 +000027#include "clang/Basic/SourceManager.h"
Chris Lattnera7944d82007-11-27 18:22:04 +000028#include "clang/Basic/TargetInfo.h"
Benjamin Kramerea70eb32012-12-01 15:09:41 +000029#include "clang/Lex/Lexer.h"
30#include "clang/Lex/LiteralSupport.h"
Eugene Zelenkoae304b02017-11-17 18:09:48 +000031#include "clang/Sema/SemaDiagnostic.h"
Douglas Gregor0840cc02009-11-01 20:32:48 +000032#include "llvm/Support/ErrorHandling.h"
Anders Carlsson2fb08242009-09-08 18:24:21 +000033#include "llvm/Support/raw_ostream.h"
Douglas Gregord5846a12009-04-15 06:41:24 +000034#include <algorithm>
Eli Friedmanfcec6302011-11-01 02:23:42 +000035#include <cstring>
Chris Lattner1b926492006-08-23 06:42:10 +000036using namespace clang;
37
Richard Smith018ac392016-11-03 18:55:18 +000038const Expr *Expr::getBestDynamicClassTypeExpr() const {
39 const Expr *E = this;
40 while (true) {
41 E = E->ignoreParenBaseCasts();
Rafael Espindola49e860b2012-06-26 17:45:31 +000042
Richard Smith018ac392016-11-03 18:55:18 +000043 // Follow the RHS of a comma operator.
44 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
45 if (BO->getOpcode() == BO_Comma) {
46 E = BO->getRHS();
47 continue;
48 }
49 }
50
51 // Step into initializer for materialized temporaries.
52 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
53 E = MTE->GetTemporaryExpr();
54 continue;
55 }
56
57 break;
58 }
59
60 return E;
61}
62
63const CXXRecordDecl *Expr::getBestDynamicClassType() const {
64 const Expr *E = getBestDynamicClassTypeExpr();
Rafael Espindola49e860b2012-06-26 17:45:31 +000065 QualType DerivedType = E->getType();
Rafael Espindola49e860b2012-06-26 17:45:31 +000066 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
67 DerivedType = PTy->getPointeeType();
68
Rafael Espindola60a2bba2012-07-17 20:24:05 +000069 if (DerivedType->isDependentType())
Craig Topper36250ad2014-05-12 05:36:57 +000070 return nullptr;
Rafael Espindola60a2bba2012-07-17 20:24:05 +000071
Rafael Espindola49e860b2012-06-26 17:45:31 +000072 const RecordType *Ty = DerivedType->castAs<RecordType>();
Rafael Espindola49e860b2012-06-26 17:45:31 +000073 Decl *D = Ty->getDecl();
74 return cast<CXXRecordDecl>(D);
75}
76
Richard Smithf3fabd22013-06-03 00:17:11 +000077const Expr *Expr::skipRValueSubobjectAdjustments(
78 SmallVectorImpl<const Expr *> &CommaLHSs,
79 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
Rafael Espindola9c006de2012-10-27 01:03:43 +000080 const Expr *E = this;
81 while (true) {
82 E = E->IgnoreParens();
83
84 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
85 if ((CE->getCastKind() == CK_DerivedToBase ||
86 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
87 E->getType()->isRecordType()) {
88 E = CE->getSubExpr();
89 CXXRecordDecl *Derived
90 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
91 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
92 continue;
93 }
94
95 if (CE->getCastKind() == CK_NoOp) {
96 E = CE->getSubExpr();
97 continue;
98 }
99 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
Richard Smith6b6f8aa2013-06-15 00:30:29 +0000100 if (!ME->isArrow()) {
Rafael Espindola9c006de2012-10-27 01:03:43 +0000101 assert(ME->getBase()->getType()->isRecordType());
102 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
Richard Smith6b6f8aa2013-06-15 00:30:29 +0000103 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
Richard Smith2d187902013-06-03 07:13:35 +0000104 E = ME->getBase();
105 Adjustments.push_back(SubobjectAdjustment(Field));
106 continue;
107 }
Rafael Espindola9c006de2012-10-27 01:03:43 +0000108 }
109 }
110 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
Richard Smitha3fd1162018-07-24 21:18:30 +0000111 if (BO->getOpcode() == BO_PtrMemD) {
Rafael Espindola973aa202012-11-01 14:32:20 +0000112 assert(BO->getRHS()->isRValue());
Rafael Espindola9c006de2012-10-27 01:03:43 +0000113 E = BO->getLHS();
114 const MemberPointerType *MPT =
115 BO->getRHS()->getType()->getAs<MemberPointerType>();
116 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
Richard Smithf3fabd22013-06-03 00:17:11 +0000117 continue;
118 } else if (BO->getOpcode() == BO_Comma) {
119 CommaLHSs.push_back(BO->getLHS());
120 E = BO->getRHS();
121 continue;
Rafael Espindola9c006de2012-10-27 01:03:43 +0000122 }
123 }
124
125 // Nothing changed.
126 break;
127 }
128 return E;
129}
130
Chris Lattner4ebae652010-04-16 23:34:13 +0000131/// isKnownToHaveBooleanValue - Return true if this is an integer expression
132/// that is known to return 0 or 1. This happens for _Bool/bool expressions
133/// but also int expressions which are produced by things like comparisons in
134/// C.
135bool Expr::isKnownToHaveBooleanValue() const {
Peter Collingbourne91147592011-04-15 00:35:48 +0000136 const Expr *E = IgnoreParens();
137
Chris Lattner4ebae652010-04-16 23:34:13 +0000138 // If this value has _Bool type, it is obvious 0/1.
Peter Collingbourne91147592011-04-15 00:35:48 +0000139 if (E->getType()->isBooleanType()) return true;
Fangrui Song6907ce22018-07-30 19:24:48 +0000140 // If this is a non-scalar-integer type, we don't care enough to try.
Peter Collingbourne91147592011-04-15 00:35:48 +0000141 if (!E->getType()->isIntegralOrEnumerationType()) return false;
Fangrui Song6907ce22018-07-30 19:24:48 +0000142
Peter Collingbourne91147592011-04-15 00:35:48 +0000143 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
Chris Lattner4ebae652010-04-16 23:34:13 +0000144 switch (UO->getOpcode()) {
John McCalle3027922010-08-25 11:45:40 +0000145 case UO_Plus:
Chris Lattner4ebae652010-04-16 23:34:13 +0000146 return UO->getSubExpr()->isKnownToHaveBooleanValue();
Richard Trieu0f097742014-04-04 04:13:47 +0000147 case UO_LNot:
148 return true;
Chris Lattner4ebae652010-04-16 23:34:13 +0000149 default:
150 return false;
151 }
152 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000153
John McCall45d30c32010-06-12 01:56:02 +0000154 // Only look through implicit casts. If the user writes
155 // '(int) (a && b)' treat it as an arbitrary int.
Peter Collingbourne91147592011-04-15 00:35:48 +0000156 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
Chris Lattner4ebae652010-04-16 23:34:13 +0000157 return CE->getSubExpr()->isKnownToHaveBooleanValue();
Fangrui Song6907ce22018-07-30 19:24:48 +0000158
Peter Collingbourne91147592011-04-15 00:35:48 +0000159 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
Chris Lattner4ebae652010-04-16 23:34:13 +0000160 switch (BO->getOpcode()) {
161 default: return false;
John McCalle3027922010-08-25 11:45:40 +0000162 case BO_LT: // Relational operators.
163 case BO_GT:
164 case BO_LE:
165 case BO_GE:
166 case BO_EQ: // Equality operators.
167 case BO_NE:
168 case BO_LAnd: // AND operator.
169 case BO_LOr: // Logical OR operator.
Chris Lattner4ebae652010-04-16 23:34:13 +0000170 return true;
Fangrui Song6907ce22018-07-30 19:24:48 +0000171
John McCalle3027922010-08-25 11:45:40 +0000172 case BO_And: // Bitwise AND operator.
173 case BO_Xor: // Bitwise XOR operator.
174 case BO_Or: // Bitwise OR operator.
Chris Lattner4ebae652010-04-16 23:34:13 +0000175 // Handle things like (x==2)|(y==12).
176 return BO->getLHS()->isKnownToHaveBooleanValue() &&
177 BO->getRHS()->isKnownToHaveBooleanValue();
Fangrui Song6907ce22018-07-30 19:24:48 +0000178
John McCalle3027922010-08-25 11:45:40 +0000179 case BO_Comma:
180 case BO_Assign:
Chris Lattner4ebae652010-04-16 23:34:13 +0000181 return BO->getRHS()->isKnownToHaveBooleanValue();
182 }
183 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000184
Peter Collingbourne91147592011-04-15 00:35:48 +0000185 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
Chris Lattner4ebae652010-04-16 23:34:13 +0000186 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
187 CO->getFalseExpr()->isKnownToHaveBooleanValue();
Fangrui Song6907ce22018-07-30 19:24:48 +0000188
Chris Lattner4ebae652010-04-16 23:34:13 +0000189 return false;
190}
191
John McCallbd066782011-02-09 08:16:59 +0000192// Amusing macro metaprogramming hack: check whether a class provides
193// a more specific implementation of getExprLoc().
Daniel Dunbarb0ab5e92012-03-09 15:39:19 +0000194//
195// See also Stmt.cpp:{getLocStart(),getLocEnd()}.
Eugene Zelenkoae304b02017-11-17 18:09:48 +0000196namespace {
197 /// This implementation is used when a class provides a custom
198 /// implementation of getExprLoc.
199 template <class E, class T>
200 SourceLocation getExprLocImpl(const Expr *expr,
201 SourceLocation (T::*v)() const) {
202 return static_cast<const E*>(expr)->getExprLoc();
203 }
John McCallbd066782011-02-09 08:16:59 +0000204
Eugene Zelenkoae304b02017-11-17 18:09:48 +0000205 /// This implementation is used when a class doesn't provide
206 /// a custom implementation of getExprLoc. Overload resolution
207 /// should pick it over the implementation above because it's
208 /// more specialized according to function template partial ordering.
209 template <class E>
210 SourceLocation getExprLocImpl(const Expr *expr,
211 SourceLocation (Expr::*v)() const) {
212 return static_cast<const E*>(expr)->getLocStart();
213 }
Alexander Kornienkoab9db512015-06-22 23:07:51 +0000214}
John McCallbd066782011-02-09 08:16:59 +0000215
216SourceLocation Expr::getExprLoc() const {
217 switch (getStmtClass()) {
218 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
219#define ABSTRACT_STMT(type)
220#define STMT(type, base) \
Richard Smitha0cbfc92014-07-26 00:47:13 +0000221 case Stmt::type##Class: break;
John McCallbd066782011-02-09 08:16:59 +0000222#define EXPR(type, base) \
223 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
224#include "clang/AST/StmtNodes.inc"
225 }
Richard Smitha0cbfc92014-07-26 00:47:13 +0000226 llvm_unreachable("unknown expression kind");
John McCallbd066782011-02-09 08:16:59 +0000227}
228
Chris Lattner0eedafe2006-08-24 04:56:27 +0000229//===----------------------------------------------------------------------===//
230// Primary Expressions.
231//===----------------------------------------------------------------------===//
232
Fangrui Song6907ce22018-07-30 19:24:48 +0000233/// Compute the type-, value-, and instantiation-dependence of a
Douglas Gregor678d76c2011-07-01 01:22:09 +0000234/// declaration reference
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000235/// based on the declaration being referenced.
Craig Topperce7167c2013-08-22 04:58:56 +0000236static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
237 QualType T, bool &TypeDependent,
Douglas Gregor678d76c2011-07-01 01:22:09 +0000238 bool &ValueDependent,
239 bool &InstantiationDependent) {
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000240 TypeDependent = false;
241 ValueDependent = false;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000242 InstantiationDependent = false;
Douglas Gregored6c7442009-11-23 11:41:28 +0000243
244 // (TD) C++ [temp.dep.expr]p3:
245 // An id-expression is type-dependent if it contains:
246 //
Richard Smithcfaa5a32014-10-17 02:46:42 +0000247 // and
Douglas Gregored6c7442009-11-23 11:41:28 +0000248 //
249 // (VD) C++ [temp.dep.constexpr]p2:
250 // An identifier is value-dependent if it is:
Richard Smithcfaa5a32014-10-17 02:46:42 +0000251
Douglas Gregored6c7442009-11-23 11:41:28 +0000252 // (TD) - an identifier that was declared with dependent type
253 // (VD) - a name declared with a dependent type,
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000254 if (T->isDependentType()) {
255 TypeDependent = true;
256 ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000257 InstantiationDependent = true;
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000258 return;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000259 } else if (T->isInstantiationDependentType()) {
260 InstantiationDependent = true;
Douglas Gregored6c7442009-11-23 11:41:28 +0000261 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000262
Douglas Gregored6c7442009-11-23 11:41:28 +0000263 // (TD) - a conversion-function-id that specifies a dependent type
Fangrui Song6907ce22018-07-30 19:24:48 +0000264 if (D->getDeclName().getNameKind()
Douglas Gregor678d76c2011-07-01 01:22:09 +0000265 == DeclarationName::CXXConversionFunctionName) {
266 QualType T = D->getDeclName().getCXXNameType();
267 if (T->isDependentType()) {
268 TypeDependent = true;
269 ValueDependent = true;
270 InstantiationDependent = true;
271 return;
272 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000273
Douglas Gregor678d76c2011-07-01 01:22:09 +0000274 if (T->isInstantiationDependentType())
275 InstantiationDependent = true;
Douglas Gregored6c7442009-11-23 11:41:28 +0000276 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000277
Douglas Gregored6c7442009-11-23 11:41:28 +0000278 // (VD) - the name of a non-type template parameter,
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000279 if (isa<NonTypeTemplateParmDecl>(D)) {
280 ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000281 InstantiationDependent = true;
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000282 return;
283 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000284
Douglas Gregored6c7442009-11-23 11:41:28 +0000285 // (VD) - a constant with integral or enumeration type and is
286 // initialized with an expression that is value-dependent.
Richard Smithec8dcd22011-11-08 01:31:09 +0000287 // (VD) - a constant with literal type and is initialized with an
288 // expression that is value-dependent [C++11].
289 // (VD) - FIXME: Missing from the standard:
290 // - an entity with reference type and is initialized with an
291 // expression that is value-dependent [C++11]
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000292 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
Richard Smith2bf7fdb2013-01-02 11:42:31 +0000293 if ((Ctx.getLangOpts().CPlusPlus11 ?
Richard Smithd9f663b2013-04-22 15:31:51 +0000294 Var->getType()->isLiteralType(Ctx) :
Richard Smithec8dcd22011-11-08 01:31:09 +0000295 Var->getType()->isIntegralOrEnumerationType()) &&
David Blaikief5697e52012-08-10 00:55:35 +0000296 (Var->getType().isConstQualified() ||
Richard Smithec8dcd22011-11-08 01:31:09 +0000297 Var->getType()->isReferenceType())) {
Sebastian Redl5ca79842010-02-01 20:16:42 +0000298 if (const Expr *Init = Var->getAnyInitializer())
Douglas Gregor678d76c2011-07-01 01:22:09 +0000299 if (Init->isValueDependent()) {
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000300 ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000301 InstantiationDependent = true;
302 }
Richard Smithec8dcd22011-11-08 01:31:09 +0000303 }
304
Fangrui Song6907ce22018-07-30 19:24:48 +0000305 // (VD) - FIXME: Missing from the standard:
306 // - a member function or a static data member of the current
Douglas Gregor0e4de762010-05-11 08:41:30 +0000307 // instantiation
Fangrui Song6907ce22018-07-30 19:24:48 +0000308 if (Var->isStaticDataMember() &&
Richard Smithec8dcd22011-11-08 01:31:09 +0000309 Var->getDeclContext()->isDependentContext()) {
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000310 ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000311 InstantiationDependent = true;
Richard Smith00f5d892013-11-14 22:40:45 +0000312 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
313 if (TInfo->getType()->isIncompleteArrayType())
314 TypeDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000315 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000316
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000317 return;
318 }
Fangrui Song6907ce22018-07-30 19:24:48 +0000319
320 // (VD) - FIXME: Missing from the standard:
321 // - a member function or a static data member of the current
Douglas Gregor0e4de762010-05-11 08:41:30 +0000322 // instantiation
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000323 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
324 ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000325 InstantiationDependent = true;
Richard Smithec8dcd22011-11-08 01:31:09 +0000326 }
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000327}
Douglas Gregora6e053e2010-12-15 01:34:56 +0000328
Craig Topperce7167c2013-08-22 04:58:56 +0000329void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000330 bool TypeDependent = false;
331 bool ValueDependent = false;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000332 bool InstantiationDependent = false;
Daniel Dunbar9d355812012-03-09 01:51:51 +0000333 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
334 ValueDependent, InstantiationDependent);
Richard Smithcfaa5a32014-10-17 02:46:42 +0000335
336 ExprBits.TypeDependent |= TypeDependent;
337 ExprBits.ValueDependent |= ValueDependent;
338 ExprBits.InstantiationDependent |= InstantiationDependent;
339
Douglas Gregorda3cc0d2010-12-23 23:51:58 +0000340 // Is the declaration a parameter pack?
Douglas Gregorf144f4f2011-01-19 21:52:31 +0000341 if (getDecl()->isParameterPack())
Douglas Gregor3c6bd2a2011-01-05 21:11:38 +0000342 ExprBits.ContainsUnexpandedParameterPack = true;
Douglas Gregored6c7442009-11-23 11:41:28 +0000343}
344
Craig Topperce7167c2013-08-22 04:58:56 +0000345DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
Daniel Dunbar9d355812012-03-09 01:51:51 +0000346 NestedNameSpecifierLoc QualifierLoc,
Abramo Bagnara7945c982012-01-27 09:46:47 +0000347 SourceLocation TemplateKWLoc,
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000348 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
John McCall113bee02012-03-10 09:33:50 +0000349 const DeclarationNameInfo &NameInfo,
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000350 NamedDecl *FoundD,
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000351 const TemplateArgumentListInfo *TemplateArgs,
John McCall7decc9e2010-11-18 06:31:45 +0000352 QualType T, ExprValueKind VK)
Douglas Gregor678d76c2011-07-01 01:22:09 +0000353 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
Chandler Carruth0e439962011-05-01 21:29:53 +0000354 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
355 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
Richard Smithcfaa5a32014-10-17 02:46:42 +0000356 if (QualifierLoc) {
James Y Knighte7d82282015-12-29 18:15:14 +0000357 new (getTrailingObjects<NestedNameSpecifierLoc>())
358 NestedNameSpecifierLoc(QualifierLoc);
Richard Smithcfaa5a32014-10-17 02:46:42 +0000359 auto *NNS = QualifierLoc.getNestedNameSpecifier();
360 if (NNS->isInstantiationDependent())
361 ExprBits.InstantiationDependent = true;
362 if (NNS->containsUnexpandedParameterPack())
363 ExprBits.ContainsUnexpandedParameterPack = true;
364 }
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000365 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
366 if (FoundD)
James Y Knighte7d82282015-12-29 18:15:14 +0000367 *getTrailingObjects<NamedDecl *>() = FoundD;
Abramo Bagnara7945c982012-01-27 09:46:47 +0000368 DeclRefExprBits.HasTemplateKWAndArgsInfo
369 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000370 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
371 RefersToEnclosingVariableOrCapture;
Douglas Gregor678d76c2011-07-01 01:22:09 +0000372 if (TemplateArgs) {
373 bool Dependent = false;
374 bool InstantiationDependent = false;
375 bool ContainsUnexpandedParameterPack = false;
James Y Knighte7d82282015-12-29 18:15:14 +0000376 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
377 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
378 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
Richard Smithcfaa5a32014-10-17 02:46:42 +0000379 assert(!Dependent && "built a DeclRefExpr with dependent template args");
380 ExprBits.InstantiationDependent |= InstantiationDependent;
381 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
Abramo Bagnara7945c982012-01-27 09:46:47 +0000382 } else if (TemplateKWLoc.isValid()) {
James Y Knighte7d82282015-12-29 18:15:14 +0000383 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
384 TemplateKWLoc);
Douglas Gregor678d76c2011-07-01 01:22:09 +0000385 }
Benjamin Kramer138ef9c2011-10-10 12:54:05 +0000386 DeclRefExprBits.HadMultipleCandidates = 0;
387
Daniel Dunbar9d355812012-03-09 01:51:51 +0000388 computeDependence(Ctx);
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000389}
390
Craig Topperce7167c2013-08-22 04:58:56 +0000391DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
Douglas Gregorea972d32011-02-28 21:54:11 +0000392 NestedNameSpecifierLoc QualifierLoc,
Abramo Bagnara7945c982012-01-27 09:46:47 +0000393 SourceLocation TemplateKWLoc,
John McCallce546572009-12-08 09:08:17 +0000394 ValueDecl *D,
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000395 bool RefersToEnclosingVariableOrCapture,
Douglas Gregor4bd90e52009-10-23 18:54:35 +0000396 SourceLocation NameLoc,
Douglas Gregored6c7442009-11-23 11:41:28 +0000397 QualType T,
John McCall7decc9e2010-11-18 06:31:45 +0000398 ExprValueKind VK,
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000399 NamedDecl *FoundD,
Douglas Gregored6c7442009-11-23 11:41:28 +0000400 const TemplateArgumentListInfo *TemplateArgs) {
Abramo Bagnara7945c982012-01-27 09:46:47 +0000401 return Create(Context, QualifierLoc, TemplateKWLoc, D,
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000402 RefersToEnclosingVariableOrCapture,
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000403 DeclarationNameInfo(D->getDeclName(), NameLoc),
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000404 T, VK, FoundD, TemplateArgs);
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000405}
406
Craig Topperce7167c2013-08-22 04:58:56 +0000407DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
Douglas Gregorea972d32011-02-28 21:54:11 +0000408 NestedNameSpecifierLoc QualifierLoc,
Abramo Bagnara7945c982012-01-27 09:46:47 +0000409 SourceLocation TemplateKWLoc,
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000410 ValueDecl *D,
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000411 bool RefersToEnclosingVariableOrCapture,
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000412 const DeclarationNameInfo &NameInfo,
413 QualType T,
John McCall7decc9e2010-11-18 06:31:45 +0000414 ExprValueKind VK,
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000415 NamedDecl *FoundD,
Abramo Bagnarad6d2f182010-08-11 22:01:17 +0000416 const TemplateArgumentListInfo *TemplateArgs) {
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000417 // Filter out cases where the found Decl is the same as the value refenenced.
418 if (D == FoundD)
Craig Topper36250ad2014-05-12 05:36:57 +0000419 FoundD = nullptr;
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000420
James Y Knighte7d82282015-12-29 18:15:14 +0000421 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
422 std::size_t Size =
423 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
424 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
425 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
426 HasTemplateKWAndArgsInfo ? 1 : 0,
427 TemplateArgs ? TemplateArgs->size() : 0);
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000428
Benjamin Kramerc3f89252016-10-20 14:27:22 +0000429 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
Daniel Dunbar9d355812012-03-09 01:51:51 +0000430 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
Alexey Bataev19acc3d2015-01-12 10:17:46 +0000431 RefersToEnclosingVariableOrCapture,
Daniel Dunbar9d355812012-03-09 01:51:51 +0000432 NameInfo, FoundD, TemplateArgs, T, VK);
Douglas Gregor4bd90e52009-10-23 18:54:35 +0000433}
434
Craig Topperce7167c2013-08-22 04:58:56 +0000435DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
Douglas Gregor87866ce2011-02-04 12:01:24 +0000436 bool HasQualifier,
Chandler Carruth8d26bb02011-05-01 23:48:14 +0000437 bool HasFoundDecl,
Abramo Bagnara7945c982012-01-27 09:46:47 +0000438 bool HasTemplateKWAndArgsInfo,
Argyrios Kyrtzidis1985bb32010-07-08 13:09:47 +0000439 unsigned NumTemplateArgs) {
James Y Knighte7d82282015-12-29 18:15:14 +0000440 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
441 std::size_t Size =
442 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
443 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
444 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
445 NumTemplateArgs);
Benjamin Kramerc3f89252016-10-20 14:27:22 +0000446 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
Argyrios Kyrtzidis1985bb32010-07-08 13:09:47 +0000447 return new (Mem) DeclRefExpr(EmptyShell());
448}
449
Daniel Dunbarb507f272012-03-09 15:39:15 +0000450SourceLocation DeclRefExpr::getLocStart() const {
451 if (hasQualifier())
452 return getQualifierLoc().getBeginLoc();
453 return getNameInfo().getLocStart();
454}
455SourceLocation DeclRefExpr::getLocEnd() const {
456 if (hasExplicitTemplateArgs())
457 return getRAngleLoc();
458 return getNameInfo().getLocEnd();
459}
Douglas Gregor4bd90e52009-10-23 18:54:35 +0000460
Alexey Bataevec474782014-10-09 08:45:04 +0000461PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
462 StringLiteral *SL)
463 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
464 FNTy->isDependentType(), FNTy->isDependentType(),
465 FNTy->isInstantiationDependentType(),
466 /*ContainsUnexpandedParameterPack=*/false),
467 Loc(L), Type(IT), FnName(SL) {}
468
469StringLiteral *PredefinedExpr::getFunctionName() {
Alexey Bataev769562a2014-10-10 18:58:13 +0000470 return cast_or_null<StringLiteral>(FnName);
Alexey Bataevec474782014-10-09 08:45:04 +0000471}
472
473StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
474 switch (IT) {
475 case Func:
476 return "__func__";
477 case Function:
478 return "__FUNCTION__";
479 case FuncDName:
480 return "__FUNCDNAME__";
481 case LFunction:
482 return "L__FUNCTION__";
483 case PrettyFunction:
484 return "__PRETTY_FUNCTION__";
485 case FuncSig:
486 return "__FUNCSIG__";
Reid Kleckner4a83f0a2018-07-26 23:18:44 +0000487 case LFuncSig:
488 return "L__FUNCSIG__";
Alexey Bataevec474782014-10-09 08:45:04 +0000489 case PrettyFunctionNoVirtual:
490 break;
491 }
492 llvm_unreachable("Unknown ident type for PredefinedExpr");
493}
494
Anders Carlsson2fb08242009-09-08 18:24:21 +0000495// FIXME: Maybe this should use DeclPrinter with a special "print predefined
496// expr" policy instead.
Anders Carlsson5bd8d192010-02-11 18:20:28 +0000497std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
498 ASTContext &Context = CurrentDecl->getASTContext();
499
David Majnemerbed356a2013-11-06 23:31:56 +0000500 if (IT == PredefinedExpr::FuncDName) {
501 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
Ahmed Charlesb8984322014-03-07 20:03:18 +0000502 std::unique_ptr<MangleContext> MC;
David Majnemerbed356a2013-11-06 23:31:56 +0000503 MC.reset(Context.createMangleContext());
504
505 if (MC->shouldMangleDeclName(ND)) {
506 SmallString<256> Buffer;
507 llvm::raw_svector_ostream Out(Buffer);
508 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
509 MC->mangleCXXCtor(CD, Ctor_Base, Out);
510 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
511 MC->mangleCXXDtor(DD, Dtor_Base, Out);
512 else
513 MC->mangleName(ND, Out);
514
David Majnemerbed356a2013-11-06 23:31:56 +0000515 if (!Buffer.empty() && Buffer.front() == '\01')
516 return Buffer.substr(1);
517 return Buffer.str();
518 } else
519 return ND->getIdentifier()->getName();
520 }
521 return "";
522 }
Mehdi Aminidc9bf8f2016-11-16 07:07:28 +0000523 if (isa<BlockDecl>(CurrentDecl)) {
524 // For blocks we only emit something if it is enclosed in a function
525 // For top-level block we'd like to include the name of variable, but we
526 // don't have it at this point.
Mehdi Aminif5f37ee2016-11-15 22:19:50 +0000527 auto DC = CurrentDecl->getDeclContext();
528 if (DC->isFileContext())
Mehdi Aminidc9bf8f2016-11-16 07:07:28 +0000529 return "";
530
531 SmallString<256> Buffer;
532 llvm::raw_svector_ostream Out(Buffer);
533 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
534 // For nested blocks, propagate up to the parent.
535 Out << ComputeName(IT, DCBlock);
536 else if (auto *DCDecl = dyn_cast<Decl>(DC))
537 Out << ComputeName(IT, DCDecl) << "_block_invoke";
Alexey Bataevec474782014-10-09 08:45:04 +0000538 return Out.str();
539 }
Anders Carlsson2fb08242009-09-08 18:24:21 +0000540 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
Reid Kleckner4a83f0a2018-07-26 23:18:44 +0000541 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual &&
542 IT != FuncSig && IT != LFuncSig)
Anders Carlsson2fb08242009-09-08 18:24:21 +0000543 return FD->getNameAsString();
544
Dylan Noblesmith2c1dd272012-02-05 02:13:05 +0000545 SmallString<256> Name;
Anders Carlsson2fb08242009-09-08 18:24:21 +0000546 llvm::raw_svector_ostream Out(Name);
547
548 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
Anders Carlsson5bd8d192010-02-11 18:20:28 +0000549 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
Anders Carlsson2fb08242009-09-08 18:24:21 +0000550 Out << "virtual ";
Sam Weinig4e83bd22009-12-27 01:38:20 +0000551 if (MD->isStatic())
552 Out << "static ";
Anders Carlsson2fb08242009-09-08 18:24:21 +0000553 }
554
David Blaikiebbafb8a2012-03-11 07:00:24 +0000555 PrintingPolicy Policy(Context.getLangOpts());
Benjamin Kramer24ebf7c2013-02-23 13:53:57 +0000556 std::string Proto;
Douglas Gregor11a434a2012-04-10 20:14:15 +0000557 llvm::raw_string_ostream POut(Proto);
Anders Carlsson2fb08242009-09-08 18:24:21 +0000558
Douglas Gregor11a434a2012-04-10 20:14:15 +0000559 const FunctionDecl *Decl = FD;
560 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
561 Decl = Pattern;
562 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
Craig Topper36250ad2014-05-12 05:36:57 +0000563 const FunctionProtoType *FT = nullptr;
Anders Carlsson2fb08242009-09-08 18:24:21 +0000564 if (FD->hasWrittenPrototype())
565 FT = dyn_cast<FunctionProtoType>(AFT);
566
Reid Kleckner4a83f0a2018-07-26 23:18:44 +0000567 if (IT == FuncSig || IT == LFuncSig) {
Richard Smith2f63d462017-01-09 21:40:40 +0000568 switch (AFT->getCallConv()) {
Reid Kleckner52eddda2014-04-08 18:13:24 +0000569 case CC_C: POut << "__cdecl "; break;
570 case CC_X86StdCall: POut << "__stdcall "; break;
571 case CC_X86FastCall: POut << "__fastcall "; break;
572 case CC_X86ThisCall: POut << "__thiscall "; break;
Reid Klecknerd7857f02014-10-24 17:42:17 +0000573 case CC_X86VectorCall: POut << "__vectorcall "; break;
Erich Keane757d3172016-11-02 18:29:35 +0000574 case CC_X86RegCall: POut << "__regcall "; break;
Reid Kleckner52eddda2014-04-08 18:13:24 +0000575 // Only bother printing the conventions that MSVC knows about.
576 default: break;
577 }
578 }
579
580 FD->printQualifiedName(POut, Policy);
581
Douglas Gregor11a434a2012-04-10 20:14:15 +0000582 POut << "(";
Anders Carlsson2fb08242009-09-08 18:24:21 +0000583 if (FT) {
Douglas Gregor11a434a2012-04-10 20:14:15 +0000584 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
Anders Carlsson2fb08242009-09-08 18:24:21 +0000585 if (i) POut << ", ";
Argyrios Kyrtzidisa18347e2012-05-05 04:20:37 +0000586 POut << Decl->getParamDecl(i)->getType().stream(Policy);
Anders Carlsson2fb08242009-09-08 18:24:21 +0000587 }
588
589 if (FT->isVariadic()) {
590 if (FD->getNumParams()) POut << ", ";
591 POut << "...";
Reid Kleckner4a83f0a2018-07-26 23:18:44 +0000592 } else if ((IT == FuncSig || IT == LFuncSig ||
593 !Context.getLangOpts().CPlusPlus) &&
Richard Smithcf63b842017-01-09 22:16:16 +0000594 !Decl->getNumParams()) {
595 POut << "void";
Anders Carlsson2fb08242009-09-08 18:24:21 +0000596 }
597 }
Douglas Gregor11a434a2012-04-10 20:14:15 +0000598 POut << ")";
Anders Carlsson2fb08242009-09-08 18:24:21 +0000599
Sam Weinig4e83bd22009-12-27 01:38:20 +0000600 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
Richard Smith2f63d462017-01-09 21:40:40 +0000601 assert(FT && "We must have a written prototype in this case.");
David Blaikief5697e52012-08-10 00:55:35 +0000602 if (FT->isConst())
Douglas Gregor11a434a2012-04-10 20:14:15 +0000603 POut << " const";
David Blaikief5697e52012-08-10 00:55:35 +0000604 if (FT->isVolatile())
Douglas Gregor11a434a2012-04-10 20:14:15 +0000605 POut << " volatile";
606 RefQualifierKind Ref = MD->getRefQualifier();
607 if (Ref == RQ_LValue)
608 POut << " &";
609 else if (Ref == RQ_RValue)
610 POut << " &&";
Sam Weinig4e83bd22009-12-27 01:38:20 +0000611 }
612
Eugene Zelenkoae304b02017-11-17 18:09:48 +0000613 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
Douglas Gregor11a434a2012-04-10 20:14:15 +0000614 SpecsTy Specs;
615 const DeclContext *Ctx = FD->getDeclContext();
616 while (Ctx && isa<NamedDecl>(Ctx)) {
617 const ClassTemplateSpecializationDecl *Spec
618 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
619 if (Spec && !Spec->isExplicitSpecialization())
620 Specs.push_back(Spec);
621 Ctx = Ctx->getParent();
622 }
623
624 std::string TemplateParams;
625 llvm::raw_string_ostream TOut(TemplateParams);
626 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
627 I != E; ++I) {
Fangrui Song6907ce22018-07-30 19:24:48 +0000628 const TemplateParameterList *Params
Douglas Gregor11a434a2012-04-10 20:14:15 +0000629 = (*I)->getSpecializedTemplate()->getTemplateParameters();
630 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
631 assert(Params->size() == Args.size());
632 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
633 StringRef Param = Params->getParam(i)->getName();
634 if (Param.empty()) continue;
635 TOut << Param << " = ";
636 Args.get(i).print(Policy, TOut);
637 TOut << ", ";
638 }
639 }
640
Fangrui Song6907ce22018-07-30 19:24:48 +0000641 FunctionTemplateSpecializationInfo *FSI
Douglas Gregor11a434a2012-04-10 20:14:15 +0000642 = FD->getTemplateSpecializationInfo();
643 if (FSI && !FSI->isExplicitSpecialization()) {
Fangrui Song6907ce22018-07-30 19:24:48 +0000644 const TemplateParameterList* Params
Douglas Gregor11a434a2012-04-10 20:14:15 +0000645 = FSI->getTemplate()->getTemplateParameters();
646 const TemplateArgumentList* Args = FSI->TemplateArguments;
647 assert(Params->size() == Args->size());
648 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
649 StringRef Param = Params->getParam(i)->getName();
650 if (Param.empty()) continue;
651 TOut << Param << " = ";
652 Args->get(i).print(Policy, TOut);
653 TOut << ", ";
654 }
655 }
656
657 TOut.flush();
658 if (!TemplateParams.empty()) {
659 // remove the trailing comma and space
660 TemplateParams.resize(TemplateParams.size() - 2);
661 POut << " [" << TemplateParams << "]";
662 }
663
664 POut.flush();
665
Benjamin Kramer90f54222013-08-21 11:45:27 +0000666 // Print "auto" for all deduced return types. This includes C++1y return
667 // type deduction and lambdas. For trailing return types resolve the
668 // decltype expression. Otherwise print the real type when this is
669 // not a constructor or destructor.
Alexey Bataevec474782014-10-09 08:45:04 +0000670 if (isa<CXXMethodDecl>(FD) &&
671 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
Benjamin Kramer90f54222013-08-21 11:45:27 +0000672 Proto = "auto " + Proto;
Alp Toker314cc812014-01-25 16:55:45 +0000673 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
674 FT->getReturnType()
675 ->getAs<DecltypeType>()
676 ->getUnderlyingType()
Benjamin Kramer90f54222013-08-21 11:45:27 +0000677 .getAsStringInternal(Proto, Policy);
678 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
Alp Toker314cc812014-01-25 16:55:45 +0000679 AFT->getReturnType().getAsStringInternal(Proto, Policy);
Anders Carlsson2fb08242009-09-08 18:24:21 +0000680
681 Out << Proto;
682
Anders Carlsson2fb08242009-09-08 18:24:21 +0000683 return Name.str().str();
684 }
Wei Pan8d6b19a2013-08-26 14:27:34 +0000685 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
686 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
687 // Skip to its enclosing function or method, but not its enclosing
688 // CapturedDecl.
689 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
690 const Decl *D = Decl::castFromDeclContext(DC);
691 return ComputeName(IT, D);
692 }
693 llvm_unreachable("CapturedDecl not inside a function or method");
694 }
Anders Carlsson2fb08242009-09-08 18:24:21 +0000695 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
Dylan Noblesmith2c1dd272012-02-05 02:13:05 +0000696 SmallString<256> Name;
Anders Carlsson2fb08242009-09-08 18:24:21 +0000697 llvm::raw_svector_ostream Out(Name);
698 Out << (MD->isInstanceMethod() ? '-' : '+');
699 Out << '[';
Ted Kremenek361ffd92010-03-18 21:23:08 +0000700
701 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
702 // a null check to avoid a crash.
703 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
Benjamin Kramerb89514a2011-10-14 18:45:37 +0000704 Out << *ID;
Ted Kremenek361ffd92010-03-18 21:23:08 +0000705
Anders Carlsson2fb08242009-09-08 18:24:21 +0000706 if (const ObjCCategoryImplDecl *CID =
Benjamin Kramerb11416d2010-04-17 09:33:03 +0000707 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
Benjamin Kramer2f569922012-02-07 11:57:45 +0000708 Out << '(' << *CID << ')';
Benjamin Kramerb11416d2010-04-17 09:33:03 +0000709
Anders Carlsson2fb08242009-09-08 18:24:21 +0000710 Out << ' ';
Aaron Ballmanb190f972014-01-03 17:59:55 +0000711 MD->getSelector().print(Out);
Anders Carlsson2fb08242009-09-08 18:24:21 +0000712 Out << ']';
713
Anders Carlsson2fb08242009-09-08 18:24:21 +0000714 return Name.str().str();
715 }
716 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
717 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
718 return "top level";
719 }
720 return "";
721}
722
Craig Topper37932912013-08-18 10:09:15 +0000723void APNumericStorage::setIntValue(const ASTContext &C,
724 const llvm::APInt &Val) {
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000725 if (hasAllocation())
726 C.Deallocate(pVal);
727
728 BitWidth = Val.getBitWidth();
729 unsigned NumWords = Val.getNumWords();
730 const uint64_t* Words = Val.getRawData();
731 if (NumWords > 1) {
732 pVal = new (C) uint64_t[NumWords];
733 std::copy(Words, Words + NumWords, pVal);
734 } else if (NumWords == 1)
735 VAL = Words[0];
736 else
737 VAL = 0;
738}
739
Craig Topper37932912013-08-18 10:09:15 +0000740IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
Benjamin Kramer1ea8e092012-07-04 17:04:04 +0000741 QualType type, SourceLocation l)
742 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
743 false, false),
744 Loc(l) {
745 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
746 assert(V.getBitWidth() == C.getIntWidth(type) &&
747 "Integer type is not the correct size for constant.");
748 setValue(C, V);
749}
750
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000751IntegerLiteral *
Craig Topper37932912013-08-18 10:09:15 +0000752IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000753 QualType type, SourceLocation l) {
754 return new (C) IntegerLiteral(C, V, type, l);
755}
756
757IntegerLiteral *
Craig Topper37932912013-08-18 10:09:15 +0000758IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000759 return new (C) IntegerLiteral(Empty);
760}
761
Leonard Chandb01c3a2018-06-20 17:19:40 +0000762FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
763 QualType type, SourceLocation l,
764 unsigned Scale)
765 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
766 false, false),
767 Loc(l), Scale(Scale) {
768 assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral");
769 assert(V.getBitWidth() == C.getTypeInfo(type).Width &&
770 "Fixed point type is not the correct size for constant.");
771 setValue(C, V);
772}
773
774FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
775 const llvm::APInt &V,
776 QualType type,
777 SourceLocation l,
778 unsigned Scale) {
779 return new (C) FixedPointLiteral(C, V, type, l, Scale);
780}
781
782std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
783 // Currently the longest decimal number that can be printed is the max for an
784 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
785 // which is 43 characters.
786 SmallString<64> S;
787 FixedPointValueToString(
Leonard Chanc03642e2018-08-06 16:05:08 +0000788 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
Leonard Chandb01c3a2018-06-20 17:19:40 +0000789 return S.str();
790}
791
Craig Topper37932912013-08-18 10:09:15 +0000792FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
Benjamin Kramer1ea8e092012-07-04 17:04:04 +0000793 bool isexact, QualType Type, SourceLocation L)
794 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
795 false, false), Loc(L) {
Tim Northover178723a2013-01-22 09:46:51 +0000796 setSemantics(V.getSemantics());
Benjamin Kramer1ea8e092012-07-04 17:04:04 +0000797 FloatingLiteralBits.IsExact = isexact;
798 setValue(C, V);
799}
800
Craig Topper37932912013-08-18 10:09:15 +0000801FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
Eugene Zelenkoae304b02017-11-17 18:09:48 +0000802 : Expr(FloatingLiteralClass, Empty) {
Tim Northover178723a2013-01-22 09:46:51 +0000803 setRawSemantics(IEEEhalf);
Benjamin Kramer1ea8e092012-07-04 17:04:04 +0000804 FloatingLiteralBits.IsExact = false;
805}
806
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000807FloatingLiteral *
Craig Topper37932912013-08-18 10:09:15 +0000808FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000809 bool isexact, QualType Type, SourceLocation L) {
810 return new (C) FloatingLiteral(C, V, isexact, Type, L);
811}
812
813FloatingLiteral *
Craig Topper37932912013-08-18 10:09:15 +0000814FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
Akira Hatanaka428f5b22012-01-10 22:40:09 +0000815 return new (C) FloatingLiteral(C, Empty);
Argyrios Kyrtzidis43b20572010-08-28 09:06:06 +0000816}
817
Tim Northover178723a2013-01-22 09:46:51 +0000818const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
819 switch(FloatingLiteralBits.Semantics) {
820 case IEEEhalf:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000821 return llvm::APFloat::IEEEhalf();
Tim Northover178723a2013-01-22 09:46:51 +0000822 case IEEEsingle:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000823 return llvm::APFloat::IEEEsingle();
Tim Northover178723a2013-01-22 09:46:51 +0000824 case IEEEdouble:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000825 return llvm::APFloat::IEEEdouble();
Tim Northover178723a2013-01-22 09:46:51 +0000826 case x87DoubleExtended:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000827 return llvm::APFloat::x87DoubleExtended();
Tim Northover178723a2013-01-22 09:46:51 +0000828 case IEEEquad:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000829 return llvm::APFloat::IEEEquad();
Tim Northover178723a2013-01-22 09:46:51 +0000830 case PPCDoubleDouble:
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000831 return llvm::APFloat::PPCDoubleDouble();
Tim Northover178723a2013-01-22 09:46:51 +0000832 }
833 llvm_unreachable("Unrecognised floating semantics");
834}
835
836void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000837 if (&Sem == &llvm::APFloat::IEEEhalf())
Tim Northover178723a2013-01-22 09:46:51 +0000838 FloatingLiteralBits.Semantics = IEEEhalf;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000839 else if (&Sem == &llvm::APFloat::IEEEsingle())
Tim Northover178723a2013-01-22 09:46:51 +0000840 FloatingLiteralBits.Semantics = IEEEsingle;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000841 else if (&Sem == &llvm::APFloat::IEEEdouble())
Tim Northover178723a2013-01-22 09:46:51 +0000842 FloatingLiteralBits.Semantics = IEEEdouble;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000843 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
Tim Northover178723a2013-01-22 09:46:51 +0000844 FloatingLiteralBits.Semantics = x87DoubleExtended;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000845 else if (&Sem == &llvm::APFloat::IEEEquad())
Tim Northover178723a2013-01-22 09:46:51 +0000846 FloatingLiteralBits.Semantics = IEEEquad;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000847 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
Tim Northover178723a2013-01-22 09:46:51 +0000848 FloatingLiteralBits.Semantics = PPCDoubleDouble;
849 else
850 llvm_unreachable("Unknown floating semantics");
851}
852
Chris Lattnera0173132008-06-07 22:13:43 +0000853/// getValueAsApproximateDouble - This returns the value as an inaccurate
854/// double. Note that this may cause loss of precision, but is useful for
855/// debugging dumps, etc.
856double FloatingLiteral::getValueAsApproximateDouble() const {
857 llvm::APFloat V = getValue();
Dale Johannesenc48814b2008-10-09 23:02:32 +0000858 bool ignored;
Stephan Bergmann17c7f702016-12-14 11:57:17 +0000859 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
Dale Johannesenc48814b2008-10-09 23:02:32 +0000860 &ignored);
Chris Lattnera0173132008-06-07 22:13:43 +0000861 return V.convertToDouble();
862}
863
Nick Lewycky4ed84042012-02-24 09:07:53 +0000864int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
Eli Friedman381f4312012-02-29 20:59:56 +0000865 int CharByteWidth = 0;
Nick Lewycky4ed84042012-02-24 09:07:53 +0000866 switch(k) {
Eli Friedmanfcec6302011-11-01 02:23:42 +0000867 case Ascii:
868 case UTF8:
Nick Lewycky4ed84042012-02-24 09:07:53 +0000869 CharByteWidth = target.getCharWidth();
Eli Friedmanfcec6302011-11-01 02:23:42 +0000870 break;
871 case Wide:
Nick Lewycky4ed84042012-02-24 09:07:53 +0000872 CharByteWidth = target.getWCharWidth();
Eli Friedmanfcec6302011-11-01 02:23:42 +0000873 break;
874 case UTF16:
Nick Lewycky4ed84042012-02-24 09:07:53 +0000875 CharByteWidth = target.getChar16Width();
Eli Friedmanfcec6302011-11-01 02:23:42 +0000876 break;
877 case UTF32:
Nick Lewycky4ed84042012-02-24 09:07:53 +0000878 CharByteWidth = target.getChar32Width();
Eli Friedman381f4312012-02-29 20:59:56 +0000879 break;
Eli Friedmanfcec6302011-11-01 02:23:42 +0000880 }
881 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
882 CharByteWidth /= 8;
Nick Lewycky4ed84042012-02-24 09:07:53 +0000883 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
Eli Friedmanfcec6302011-11-01 02:23:42 +0000884 && "character byte widths supported are 1, 2, and 4 only");
885 return CharByteWidth;
886}
887
Craig Topper37932912013-08-18 10:09:15 +0000888StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
Douglas Gregorfb65e592011-07-27 05:40:30 +0000889 StringKind Kind, bool Pascal, QualType Ty,
Mike Stump11289f42009-09-09 15:08:12 +0000890 const SourceLocation *Loc,
Anders Carlssona3905812009-03-15 18:34:13 +0000891 unsigned NumStrs) {
Benjamin Kramercdac7612014-02-25 12:26:20 +0000892 assert(C.getAsConstantArrayType(Ty) &&
893 "StringLiteral must be of constant array type!");
894
Chris Lattnerf83b5af2009-02-18 06:40:38 +0000895 // Allocate enough space for the StringLiteral plus an array of locations for
896 // any concatenated string tokens.
Benjamin Kramerc3f89252016-10-20 14:27:22 +0000897 void *Mem =
898 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
899 alignof(StringLiteral));
Chris Lattnerf83b5af2009-02-18 06:40:38 +0000900 StringLiteral *SL = new (Mem) StringLiteral(Ty);
Mike Stump11289f42009-09-09 15:08:12 +0000901
Steve Naroffdf7855b2007-02-21 23:46:25 +0000902 // OPTIMIZE: could allocate this appended to the StringLiteral.
Eli Friedmanfcec6302011-11-01 02:23:42 +0000903 SL->setString(C,Str,Kind,Pascal);
904
Chris Lattnerf83b5af2009-02-18 06:40:38 +0000905 SL->TokLocs[0] = Loc[0];
906 SL->NumConcatenated = NumStrs;
Chris Lattnerd3e98952006-10-06 05:22:26 +0000907
Chris Lattner630970d2009-02-18 05:49:11 +0000908 if (NumStrs != 1)
Chris Lattnerf83b5af2009-02-18 06:40:38 +0000909 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
910 return SL;
Chris Lattner630970d2009-02-18 05:49:11 +0000911}
912
Craig Topper37932912013-08-18 10:09:15 +0000913StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
914 unsigned NumStrs) {
Benjamin Kramerc3f89252016-10-20 14:27:22 +0000915 void *Mem =
916 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
917 alignof(StringLiteral));
Anastasia Stulova59055b92018-05-09 13:23:26 +0000918 StringLiteral *SL =
919 new (Mem) StringLiteral(C.adjustStringLiteralBaseType(QualType()));
Eli Friedmanfcec6302011-11-01 02:23:42 +0000920 SL->CharByteWidth = 0;
921 SL->Length = 0;
Douglas Gregor958dfc92009-04-15 16:35:07 +0000922 SL->NumConcatenated = NumStrs;
923 return SL;
924}
925
Alexander Kornienko540bacb2013-02-01 12:35:51 +0000926void StringLiteral::outputString(raw_ostream &OS) const {
Richard Trieudc355912012-06-13 20:25:24 +0000927 switch (getKind()) {
928 case Ascii: break; // no prefix.
929 case Wide: OS << 'L'; break;
930 case UTF8: OS << "u8"; break;
931 case UTF16: OS << 'u'; break;
932 case UTF32: OS << 'U'; break;
933 }
934 OS << '"';
935 static const char Hex[] = "0123456789ABCDEF";
936
937 unsigned LastSlashX = getLength();
938 for (unsigned I = 0, N = getLength(); I != N; ++I) {
939 switch (uint32_t Char = getCodeUnit(I)) {
940 default:
941 // FIXME: Convert UTF-8 back to codepoints before rendering.
942
943 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
944 // Leave invalid surrogates alone; we'll use \x for those.
Fangrui Song6907ce22018-07-30 19:24:48 +0000945 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
Richard Trieudc355912012-06-13 20:25:24 +0000946 Char <= 0xdbff) {
947 uint32_t Trail = getCodeUnit(I + 1);
948 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
949 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
950 ++I;
951 }
952 }
953
954 if (Char > 0xff) {
955 // If this is a wide string, output characters over 0xff using \x
956 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
957 // codepoint: use \x escapes for invalid codepoints.
958 if (getKind() == Wide ||
959 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
960 // FIXME: Is this the best way to print wchar_t?
961 OS << "\\x";
962 int Shift = 28;
963 while ((Char >> Shift) == 0)
964 Shift -= 4;
965 for (/**/; Shift >= 0; Shift -= 4)
966 OS << Hex[(Char >> Shift) & 15];
967 LastSlashX = I;
968 break;
969 }
970
971 if (Char > 0xffff)
972 OS << "\\U00"
973 << Hex[(Char >> 20) & 15]
974 << Hex[(Char >> 16) & 15];
975 else
976 OS << "\\u";
977 OS << Hex[(Char >> 12) & 15]
978 << Hex[(Char >> 8) & 15]
979 << Hex[(Char >> 4) & 15]
980 << Hex[(Char >> 0) & 15];
981 break;
982 }
983
984 // If we used \x... for the previous character, and this character is a
985 // hexadecimal digit, prevent it being slurped as part of the \x.
986 if (LastSlashX + 1 == I) {
987 switch (Char) {
988 case '0': case '1': case '2': case '3': case '4':
989 case '5': case '6': case '7': case '8': case '9':
990 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
991 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
992 OS << "\"\"";
993 }
994 }
995
996 assert(Char <= 0xff &&
997 "Characters above 0xff should already have been handled.");
998
Jordan Rosea7d03842013-02-08 22:30:41 +0000999 if (isPrintable(Char))
Richard Trieudc355912012-06-13 20:25:24 +00001000 OS << (char)Char;
1001 else // Output anything hard as an octal escape.
1002 OS << '\\'
1003 << (char)('0' + ((Char >> 6) & 7))
1004 << (char)('0' + ((Char >> 3) & 7))
1005 << (char)('0' + ((Char >> 0) & 7));
1006 break;
1007 // Handle some common non-printable cases to make dumps prettier.
1008 case '\\': OS << "\\\\"; break;
1009 case '"': OS << "\\\""; break;
Richard Trieudc355912012-06-13 20:25:24 +00001010 case '\a': OS << "\\a"; break;
1011 case '\b': OS << "\\b"; break;
Benjamin Kramer60a53d52016-11-24 09:41:33 +00001012 case '\f': OS << "\\f"; break;
1013 case '\n': OS << "\\n"; break;
1014 case '\r': OS << "\\r"; break;
1015 case '\t': OS << "\\t"; break;
1016 case '\v': OS << "\\v"; break;
Richard Trieudc355912012-06-13 20:25:24 +00001017 }
1018 }
1019 OS << '"';
1020}
1021
Craig Topper37932912013-08-18 10:09:15 +00001022void StringLiteral::setString(const ASTContext &C, StringRef Str,
Eli Friedmanfcec6302011-11-01 02:23:42 +00001023 StringKind Kind, bool IsPascal) {
1024 //FIXME: we assume that the string data comes from a target that uses the same
Simon Pilgrim2c518802017-03-30 14:13:19 +00001025 // code unit size and endianness for the type of string.
Eli Friedmanfcec6302011-11-01 02:23:42 +00001026 this->Kind = Kind;
1027 this->IsPascal = IsPascal;
Fangrui Song6907ce22018-07-30 19:24:48 +00001028
Nick Lewycky4ed84042012-02-24 09:07:53 +00001029 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
Eli Friedmanfcec6302011-11-01 02:23:42 +00001030 assert((Str.size()%CharByteWidth == 0)
1031 && "size of data must be multiple of CharByteWidth");
1032 Length = Str.size()/CharByteWidth;
1033
1034 switch(CharByteWidth) {
1035 case 1: {
1036 char *AStrData = new (C) char[Length];
Argyrios Kyrtzidis61710892012-09-14 21:17:41 +00001037 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
Eli Friedmanfcec6302011-11-01 02:23:42 +00001038 StrData.asChar = AStrData;
1039 break;
1040 }
1041 case 2: {
1042 uint16_t *AStrData = new (C) uint16_t[Length];
Argyrios Kyrtzidis61710892012-09-14 21:17:41 +00001043 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
Eli Friedmanfcec6302011-11-01 02:23:42 +00001044 StrData.asUInt16 = AStrData;
1045 break;
1046 }
1047 case 4: {
1048 uint32_t *AStrData = new (C) uint32_t[Length];
Argyrios Kyrtzidis61710892012-09-14 21:17:41 +00001049 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
Eli Friedmanfcec6302011-11-01 02:23:42 +00001050 StrData.asUInt32 = AStrData;
1051 break;
1052 }
1053 default:
Davide Italiano04839a52016-01-30 08:03:54 +00001054 llvm_unreachable("unsupported CharByteWidth");
Eli Friedmanfcec6302011-11-01 02:23:42 +00001055 }
Douglas Gregor958dfc92009-04-15 16:35:07 +00001056}
1057
Chris Lattnere925d612010-11-17 07:37:15 +00001058/// getLocationOfByte - Return a source location that points to the specified
1059/// byte of this string literal.
1060///
1061/// Strings are amazingly complex. They can be formed from multiple tokens and
1062/// can have escape sequences in them in addition to the usual trigraph and
1063/// escaped newline business. This routine handles this complexity.
1064///
Richard Smithefb116f2015-12-10 01:11:47 +00001065/// The *StartToken sets the first token to be searched in this function and
1066/// the *StartTokenByteOffset is the byte offset of the first token. Before
1067/// returning, it updates the *StartToken to the TokNo of the token being found
1068/// and sets *StartTokenByteOffset to the byte offset of the token in the
1069/// string.
1070/// Using these two parameters can reduce the time complexity from O(n^2) to
1071/// O(n) if one wants to get the location of byte for all the tokens in a
1072/// string.
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001073///
Richard Smithefb116f2015-12-10 01:11:47 +00001074SourceLocation
1075StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1076 const LangOptions &Features,
1077 const TargetInfo &Target, unsigned *StartToken,
1078 unsigned *StartTokenByteOffset) const {
Richard Smith4060f772012-06-13 05:37:23 +00001079 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1080 "Only narrow string literals are currently supported");
Douglas Gregorfb65e592011-07-27 05:40:30 +00001081
Chris Lattnere925d612010-11-17 07:37:15 +00001082 // Loop over all of the tokens in this string until we find the one that
1083 // contains the byte we're looking for.
1084 unsigned TokNo = 0;
Richard Smithefb116f2015-12-10 01:11:47 +00001085 unsigned StringOffset = 0;
1086 if (StartToken)
1087 TokNo = *StartToken;
1088 if (StartTokenByteOffset) {
1089 StringOffset = *StartTokenByteOffset;
1090 ByteNo -= StringOffset;
1091 }
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001092 while (1) {
Chris Lattnere925d612010-11-17 07:37:15 +00001093 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1094 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
Fangrui Song6907ce22018-07-30 19:24:48 +00001095
Chris Lattnere925d612010-11-17 07:37:15 +00001096 // Get the spelling of the string so that we can get the data that makes up
1097 // the string literal, not the identifier for the macro it is potentially
1098 // expanded through.
1099 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
Richard Smithefb116f2015-12-10 01:11:47 +00001100
Chris Lattnere925d612010-11-17 07:37:15 +00001101 // Re-lex the token to get its length and original spelling.
Richard Smithefb116f2015-12-10 01:11:47 +00001102 std::pair<FileID, unsigned> LocInfo =
1103 SM.getDecomposedLoc(StrTokSpellingLoc);
Chris Lattnere925d612010-11-17 07:37:15 +00001104 bool Invalid = false;
Chris Lattner0e62c1c2011-07-23 10:55:15 +00001105 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
Richard Smithefb116f2015-12-10 01:11:47 +00001106 if (Invalid) {
1107 if (StartTokenByteOffset != nullptr)
1108 *StartTokenByteOffset = StringOffset;
1109 if (StartToken != nullptr)
1110 *StartToken = TokNo;
Chris Lattnere925d612010-11-17 07:37:15 +00001111 return StrTokSpellingLoc;
Richard Smithefb116f2015-12-10 01:11:47 +00001112 }
1113
Chris Lattnere925d612010-11-17 07:37:15 +00001114 const char *StrData = Buffer.data()+LocInfo.second;
Fangrui Song6907ce22018-07-30 19:24:48 +00001115
Chris Lattnere925d612010-11-17 07:37:15 +00001116 // Create a lexer starting at the beginning of this token.
Argyrios Kyrtzidis45f51182012-05-11 21:39:18 +00001117 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1118 Buffer.begin(), StrData, Buffer.end());
Chris Lattnere925d612010-11-17 07:37:15 +00001119 Token TheTok;
1120 TheLexer.LexFromRawLexer(TheTok);
Fangrui Song6907ce22018-07-30 19:24:48 +00001121
Chris Lattnere925d612010-11-17 07:37:15 +00001122 // Use the StringLiteralParser to compute the length of the string in bytes.
Craig Topper9d5583e2014-06-26 04:58:39 +00001123 StringLiteralParser SLP(TheTok, SM, Features, Target);
Chris Lattnere925d612010-11-17 07:37:15 +00001124 unsigned TokNumBytes = SLP.GetStringLength();
Fangrui Song6907ce22018-07-30 19:24:48 +00001125
Chris Lattnere925d612010-11-17 07:37:15 +00001126 // If the byte is in this token, return the location of the byte.
1127 if (ByteNo < TokNumBytes ||
Hans Wennborg77d1abe2011-06-30 20:17:41 +00001128 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
Richard Smithefb116f2015-12-10 01:11:47 +00001129 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1130
Chris Lattnere925d612010-11-17 07:37:15 +00001131 // Now that we know the offset of the token in the spelling, use the
1132 // preprocessor to get the offset in the original source.
Richard Smithefb116f2015-12-10 01:11:47 +00001133 if (StartTokenByteOffset != nullptr)
1134 *StartTokenByteOffset = StringOffset;
1135 if (StartToken != nullptr)
1136 *StartToken = TokNo;
Chris Lattnere925d612010-11-17 07:37:15 +00001137 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1138 }
Richard Smithefb116f2015-12-10 01:11:47 +00001139
Chris Lattnere925d612010-11-17 07:37:15 +00001140 // Move to the next string token.
Richard Smithefb116f2015-12-10 01:11:47 +00001141 StringOffset += TokNumBytes;
Chris Lattnere925d612010-11-17 07:37:15 +00001142 ++TokNo;
1143 ByteNo -= TokNumBytes;
1144 }
1145}
1146
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001147
1148
Chris Lattner1b926492006-08-23 06:42:10 +00001149/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1150/// corresponds to, e.g. "sizeof" or "[pre]++".
David Blaikie1d202a62012-10-08 01:11:04 +00001151StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
Chris Lattner1b926492006-08-23 06:42:10 +00001152 switch (Op) {
Etienne Bergeron5356d962016-05-12 20:58:56 +00001153#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1154#include "clang/AST/OperationKinds.def"
Chris Lattner1b926492006-08-23 06:42:10 +00001155 }
David Blaikief47fa302012-01-17 02:30:50 +00001156 llvm_unreachable("Unknown unary operator");
Chris Lattner1b926492006-08-23 06:42:10 +00001157}
1158
John McCalle3027922010-08-25 11:45:40 +00001159UnaryOperatorKind
Douglas Gregor084d8552009-03-13 23:49:33 +00001160UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1161 switch (OO) {
David Blaikie83d382b2011-09-23 05:06:16 +00001162 default: llvm_unreachable("No unary operator for overloaded function");
John McCalle3027922010-08-25 11:45:40 +00001163 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1164 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1165 case OO_Amp: return UO_AddrOf;
1166 case OO_Star: return UO_Deref;
1167 case OO_Plus: return UO_Plus;
1168 case OO_Minus: return UO_Minus;
1169 case OO_Tilde: return UO_Not;
1170 case OO_Exclaim: return UO_LNot;
Richard Smith9f690bd2015-10-27 06:02:45 +00001171 case OO_Coawait: return UO_Coawait;
Douglas Gregor084d8552009-03-13 23:49:33 +00001172 }
1173}
1174
1175OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1176 switch (Opc) {
John McCalle3027922010-08-25 11:45:40 +00001177 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1178 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1179 case UO_AddrOf: return OO_Amp;
1180 case UO_Deref: return OO_Star;
1181 case UO_Plus: return OO_Plus;
1182 case UO_Minus: return OO_Minus;
1183 case UO_Not: return OO_Tilde;
1184 case UO_LNot: return OO_Exclaim;
Richard Smith9f690bd2015-10-27 06:02:45 +00001185 case UO_Coawait: return OO_Coawait;
Douglas Gregor084d8552009-03-13 23:49:33 +00001186 default: return OO_None;
1187 }
1188}
1189
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001190
Chris Lattner0eedafe2006-08-24 04:56:27 +00001191//===----------------------------------------------------------------------===//
1192// Postfix Operators.
1193//===----------------------------------------------------------------------===//
Chris Lattnere165d942006-08-24 04:40:38 +00001194
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001195CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1196 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
Craig Topper37932912013-08-18 10:09:15 +00001197 ExprValueKind VK, SourceLocation rparenloc)
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001198 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1199 fn->isValueDependent(), fn->isInstantiationDependent(),
1200 fn->containsUnexpandedParameterPack()),
1201 NumArgs(args.size()) {
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001202
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001203 unsigned NumPreArgs = preargs.size();
1204 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
Douglas Gregor993603d2008-11-14 16:09:21 +00001205 SubExprs[FN] = fn;
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001206 for (unsigned i = 0; i != NumPreArgs; ++i) {
1207 updateDependenciesFromArg(preargs[i]);
1208 SubExprs[i+PREARGS_START] = preargs[i];
1209 }
Benjamin Kramerc215e762012-08-24 11:54:20 +00001210 for (unsigned i = 0; i != args.size(); ++i) {
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001211 updateDependenciesFromArg(args[i]);
Peter Collingbourne3a347252011-02-08 21:18:02 +00001212 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
Douglas Gregora6e053e2010-12-15 01:34:56 +00001213 }
Ted Kremenekd7b4f402009-02-09 20:51:47 +00001214
Peter Collingbourne3a347252011-02-08 21:18:02 +00001215 CallExprBits.NumPreArgs = NumPreArgs;
Douglas Gregor993603d2008-11-14 16:09:21 +00001216 RParenLoc = rparenloc;
1217}
Nate Begeman1e36a852008-01-17 17:46:27 +00001218
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001219CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1220 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1221 SourceLocation rparenloc)
1222 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1223
Benjamin Kramerf04f98d2015-03-06 14:15:57 +00001224CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
John McCall7decc9e2010-11-18 06:31:45 +00001225 QualType t, ExprValueKind VK, SourceLocation rparenloc)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001226 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1227}
Chris Lattnere165d942006-08-24 04:40:38 +00001228
Craig Topper37932912013-08-18 10:09:15 +00001229CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
Benjamin Kramerf04f98d2015-03-06 14:15:57 +00001230 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
Peter Collingbourne3a347252011-02-08 21:18:02 +00001231
Craig Topper37932912013-08-18 10:09:15 +00001232CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
Peter Collingbourne3a347252011-02-08 21:18:02 +00001233 EmptyShell Empty)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001234 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
Peter Collingbourne3a347252011-02-08 21:18:02 +00001235 // FIXME: Why do we allocate this?
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001236 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
Peter Collingbourne3a347252011-02-08 21:18:02 +00001237 CallExprBits.NumPreArgs = NumPreArgs;
Douglas Gregore20a2e52009-04-15 17:43:59 +00001238}
1239
Justin Lebarf8bdacb2016-01-14 23:31:30 +00001240void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1241 if (Arg->isTypeDependent())
1242 ExprBits.TypeDependent = true;
1243 if (Arg->isValueDependent())
1244 ExprBits.ValueDependent = true;
1245 if (Arg->isInstantiationDependent())
1246 ExprBits.InstantiationDependent = true;
1247 if (Arg->containsUnexpandedParameterPack())
1248 ExprBits.ContainsUnexpandedParameterPack = true;
1249}
1250
John McCallb92ab1a2016-10-26 23:46:34 +00001251FunctionDecl *CallExpr::getDirectCallee() {
1252 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1253}
1254
Nuno Lopes518e3702009-12-20 23:11:08 +00001255Decl *CallExpr::getCalleeDecl() {
John McCallb92ab1a2016-10-26 23:46:34 +00001256 return getCallee()->getReferencedDeclOfCallee();
1257}
1258
1259Decl *Expr::getReferencedDeclOfCallee() {
1260 Expr *CEE = IgnoreParenImpCasts();
Fangrui Song6907ce22018-07-30 19:24:48 +00001261
Douglas Gregore0e96302011-09-06 21:41:04 +00001262 while (SubstNonTypeTemplateParmExpr *NTTP
1263 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1264 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1265 }
Fangrui Song6907ce22018-07-30 19:24:48 +00001266
Sebastian Redl2b1832e2010-09-10 20:55:30 +00001267 // If we're calling a dereference, look at the pointer instead.
1268 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1269 if (BO->isPtrMemOp())
1270 CEE = BO->getRHS()->IgnoreParenCasts();
1271 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1272 if (UO->getOpcode() == UO_Deref)
1273 CEE = UO->getSubExpr()->IgnoreParenCasts();
1274 }
Chris Lattner52301912009-07-17 15:46:27 +00001275 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
Nuno Lopes518e3702009-12-20 23:11:08 +00001276 return DRE->getDecl();
Nuno Lopesc095b532009-12-24 00:28:18 +00001277 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1278 return ME->getMemberDecl();
Zhongxing Xu3c8fa972009-07-17 07:29:51 +00001279
Craig Topper36250ad2014-05-12 05:36:57 +00001280 return nullptr;
Zhongxing Xu3c8fa972009-07-17 07:29:51 +00001281}
1282
Chris Lattnere4407ed2007-12-28 05:25:02 +00001283/// setNumArgs - This changes the number of arguments present in this call.
1284/// Any orphaned expressions are deleted by this, and any new operands are set
1285/// to null.
Craig Topper37932912013-08-18 10:09:15 +00001286void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
Chris Lattnere4407ed2007-12-28 05:25:02 +00001287 // No change, just return.
1288 if (NumArgs == getNumArgs()) return;
Mike Stump11289f42009-09-09 15:08:12 +00001289
Chris Lattnere4407ed2007-12-28 05:25:02 +00001290 // If shrinking # arguments, just delete the extras and forgot them.
1291 if (NumArgs < getNumArgs()) {
Chris Lattnere4407ed2007-12-28 05:25:02 +00001292 this->NumArgs = NumArgs;
1293 return;
1294 }
1295
1296 // Otherwise, we are growing the # arguments. New an bigger argument array.
Peter Collingbourne3a347252011-02-08 21:18:02 +00001297 unsigned NumPreArgs = getNumPreArgs();
1298 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
Chris Lattnere4407ed2007-12-28 05:25:02 +00001299 // Copy over args.
Peter Collingbourne3a347252011-02-08 21:18:02 +00001300 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
Chris Lattnere4407ed2007-12-28 05:25:02 +00001301 NewSubExprs[i] = SubExprs[i];
1302 // Null out new args.
Peter Collingbourne3a347252011-02-08 21:18:02 +00001303 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1304 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
Craig Topper36250ad2014-05-12 05:36:57 +00001305 NewSubExprs[i] = nullptr;
Mike Stump11289f42009-09-09 15:08:12 +00001306
Douglas Gregorba6e5572009-04-17 21:46:47 +00001307 if (SubExprs) C.Deallocate(SubExprs);
Chris Lattnere4407ed2007-12-28 05:25:02 +00001308 SubExprs = NewSubExprs;
1309 this->NumArgs = NumArgs;
1310}
1311
Alp Tokera724cff2013-12-28 21:59:02 +00001312/// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
Chris Lattner01ff98a2008-10-06 05:00:53 +00001313/// not, return 0.
Alp Tokera724cff2013-12-28 21:59:02 +00001314unsigned CallExpr::getBuiltinCallee() const {
Steve Narofff6e3b3292008-01-31 01:07:12 +00001315 // All simple function calls (e.g. func()) are implicitly cast to pointer to
Mike Stump11289f42009-09-09 15:08:12 +00001316 // function. As a result, we try and obtain the DeclRefExpr from the
Steve Narofff6e3b3292008-01-31 01:07:12 +00001317 // ImplicitCastExpr.
1318 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1319 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
Chris Lattner01ff98a2008-10-06 05:00:53 +00001320 return 0;
Mike Stump11289f42009-09-09 15:08:12 +00001321
Steve Narofff6e3b3292008-01-31 01:07:12 +00001322 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1323 if (!DRE)
Chris Lattner01ff98a2008-10-06 05:00:53 +00001324 return 0;
Mike Stump11289f42009-09-09 15:08:12 +00001325
Anders Carlssonfbcf6762008-01-31 02:13:57 +00001326 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1327 if (!FDecl)
Chris Lattner01ff98a2008-10-06 05:00:53 +00001328 return 0;
Mike Stump11289f42009-09-09 15:08:12 +00001329
Douglas Gregor9eb16ea2008-11-21 15:30:19 +00001330 if (!FDecl->getIdentifier())
1331 return 0;
1332
Douglas Gregor15fc9562009-09-12 00:22:50 +00001333 return FDecl->getBuiltinID();
Chris Lattner01ff98a2008-10-06 05:00:53 +00001334}
Anders Carlssonfbcf6762008-01-31 02:13:57 +00001335
Scott Douglass503fc392015-06-10 13:53:15 +00001336bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
Alp Tokera724cff2013-12-28 21:59:02 +00001337 if (unsigned BI = getBuiltinCallee())
Richard Smith5011a002013-01-17 23:46:04 +00001338 return Ctx.BuiltinInfo.isUnevaluated(BI);
1339 return false;
1340}
1341
David Majnemerced8bdf2015-02-25 17:36:15 +00001342QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1343 const Expr *Callee = getCallee();
1344 QualType CalleeType = Callee->getType();
1345 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
Anders Carlsson00a27592009-05-26 04:57:27 +00001346 CalleeType = FnTypePtr->getPointeeType();
David Majnemerced8bdf2015-02-25 17:36:15 +00001347 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
Anders Carlsson00a27592009-05-26 04:57:27 +00001348 CalleeType = BPT->getPointeeType();
David Majnemerced8bdf2015-02-25 17:36:15 +00001349 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1350 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1351 return Ctx.VoidTy;
1352
John McCall0009fcc2011-04-26 20:42:42 +00001353 // This should never be overloaded and so should never return null.
David Majnemerced8bdf2015-02-25 17:36:15 +00001354 CalleeType = Expr::findBoundMemberType(Callee);
1355 }
1356
John McCall0009fcc2011-04-26 20:42:42 +00001357 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
Alp Toker314cc812014-01-25 16:55:45 +00001358 return FnType->getReturnType();
Anders Carlsson00a27592009-05-26 04:57:27 +00001359}
Chris Lattner01ff98a2008-10-06 05:00:53 +00001360
Daniel Dunbarcdf295c2012-03-09 15:39:24 +00001361SourceLocation CallExpr::getLocStart() const {
1362 if (isa<CXXOperatorCallExpr>(this))
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00001363 return cast<CXXOperatorCallExpr>(this)->getLocStart();
Daniel Dunbarcdf295c2012-03-09 15:39:24 +00001364
1365 SourceLocation begin = getCallee()->getLocStart();
Keno Fischer070db172014-08-15 01:39:12 +00001366 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
Daniel Dunbarcdf295c2012-03-09 15:39:24 +00001367 begin = getArg(0)->getLocStart();
1368 return begin;
1369}
1370SourceLocation CallExpr::getLocEnd() const {
1371 if (isa<CXXOperatorCallExpr>(this))
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00001372 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
Daniel Dunbarcdf295c2012-03-09 15:39:24 +00001373
1374 SourceLocation end = getRParenLoc();
Keno Fischer070db172014-08-15 01:39:12 +00001375 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
Daniel Dunbarcdf295c2012-03-09 15:39:24 +00001376 end = getArg(getNumArgs() - 1)->getLocEnd();
1377 return end;
1378}
John McCall701417a2011-02-21 06:23:05 +00001379
Craig Topper37932912013-08-18 10:09:15 +00001380OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
Douglas Gregor882211c2010-04-28 22:16:22 +00001381 SourceLocation OperatorLoc,
Fangrui Song6907ce22018-07-30 19:24:48 +00001382 TypeSourceInfo *tsi,
Benjamin Kramerc215e762012-08-24 11:54:20 +00001383 ArrayRef<OffsetOfNode> comps,
1384 ArrayRef<Expr*> exprs,
Douglas Gregor882211c2010-04-28 22:16:22 +00001385 SourceLocation RParenLoc) {
James Y Knight7281c352015-12-29 22:31:18 +00001386 void *Mem = C.Allocate(
1387 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
Douglas Gregor882211c2010-04-28 22:16:22 +00001388
Benjamin Kramerc215e762012-08-24 11:54:20 +00001389 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1390 RParenLoc);
Douglas Gregor882211c2010-04-28 22:16:22 +00001391}
1392
Craig Topper37932912013-08-18 10:09:15 +00001393OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
Douglas Gregor882211c2010-04-28 22:16:22 +00001394 unsigned numComps, unsigned numExprs) {
James Y Knight7281c352015-12-29 22:31:18 +00001395 void *Mem =
1396 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
Douglas Gregor882211c2010-04-28 22:16:22 +00001397 return new (Mem) OffsetOfExpr(numComps, numExprs);
1398}
1399
Craig Topper37932912013-08-18 10:09:15 +00001400OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
Douglas Gregor882211c2010-04-28 22:16:22 +00001401 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
Benjamin Kramerc215e762012-08-24 11:54:20 +00001402 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
Douglas Gregor882211c2010-04-28 22:16:22 +00001403 SourceLocation RParenLoc)
John McCall7decc9e2010-11-18 06:31:45 +00001404 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
Fangrui Song6907ce22018-07-30 19:24:48 +00001405 /*TypeDependent=*/false,
Douglas Gregora6e053e2010-12-15 01:34:56 +00001406 /*ValueDependent=*/tsi->getType()->isDependentType(),
Douglas Gregor678d76c2011-07-01 01:22:09 +00001407 tsi->getType()->isInstantiationDependentType(),
Douglas Gregora6e053e2010-12-15 01:34:56 +00001408 tsi->getType()->containsUnexpandedParameterPack()),
Fangrui Song6907ce22018-07-30 19:24:48 +00001409 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
Benjamin Kramerc215e762012-08-24 11:54:20 +00001410 NumComps(comps.size()), NumExprs(exprs.size())
Douglas Gregor882211c2010-04-28 22:16:22 +00001411{
Benjamin Kramerc215e762012-08-24 11:54:20 +00001412 for (unsigned i = 0; i != comps.size(); ++i) {
1413 setComponent(i, comps[i]);
Douglas Gregor882211c2010-04-28 22:16:22 +00001414 }
Fangrui Song6907ce22018-07-30 19:24:48 +00001415
Benjamin Kramerc215e762012-08-24 11:54:20 +00001416 for (unsigned i = 0; i != exprs.size(); ++i) {
1417 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
Douglas Gregora6e053e2010-12-15 01:34:56 +00001418 ExprBits.ValueDependent = true;
Benjamin Kramerc215e762012-08-24 11:54:20 +00001419 if (exprs[i]->containsUnexpandedParameterPack())
Douglas Gregora6e053e2010-12-15 01:34:56 +00001420 ExprBits.ContainsUnexpandedParameterPack = true;
1421
Benjamin Kramerc215e762012-08-24 11:54:20 +00001422 setIndexExpr(i, exprs[i]);
Douglas Gregor882211c2010-04-28 22:16:22 +00001423 }
1424}
1425
James Y Knight7281c352015-12-29 22:31:18 +00001426IdentifierInfo *OffsetOfNode::getFieldName() const {
Douglas Gregor882211c2010-04-28 22:16:22 +00001427 assert(getKind() == Field || getKind() == Identifier);
1428 if (getKind() == Field)
1429 return getField()->getIdentifier();
Fangrui Song6907ce22018-07-30 19:24:48 +00001430
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001431 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
Douglas Gregor882211c2010-04-28 22:16:22 +00001432}
1433
David Majnemer10fd83d2015-01-15 10:04:14 +00001434UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1435 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1436 SourceLocation op, SourceLocation rp)
1437 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1438 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1439 // Value-dependent if the argument is type-dependent.
1440 E->isTypeDependent(), E->isInstantiationDependent(),
1441 E->containsUnexpandedParameterPack()),
1442 OpLoc(op), RParenLoc(rp) {
1443 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1444 UnaryExprOrTypeTraitExprBits.IsType = false;
1445 Argument.Ex = E;
1446
1447 // Check to see if we are in the situation where alignof(decl) should be
1448 // dependent because decl's alignment is dependent.
1449 if (ExprKind == UETT_AlignOf) {
1450 if (!isValueDependent() || !isInstantiationDependent()) {
1451 E = E->IgnoreParens();
1452
1453 const ValueDecl *D = nullptr;
1454 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1455 D = DRE->getDecl();
1456 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1457 D = ME->getMemberDecl();
1458
1459 if (D) {
1460 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1461 if (I->isAlignmentDependent()) {
1462 setValueDependent(true);
1463 setInstantiationDependent(true);
1464 break;
1465 }
1466 }
1467 }
1468 }
1469 }
1470}
1471
Aaron Ballmanf4cb2be2015-03-24 15:07:53 +00001472MemberExpr *MemberExpr::Create(
1473 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1474 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1475 ValueDecl *memberdecl, DeclAccessPair founddecl,
1476 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1477 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001478
Douglas Gregorea972d32011-02-28 21:54:11 +00001479 bool hasQualOrFound = (QualifierLoc ||
John McCalla8ae2222010-04-06 21:38:20 +00001480 founddecl.getDecl() != memberdecl ||
1481 founddecl.getAccess() != memberdecl->getAccess());
Mike Stump11289f42009-09-09 15:08:12 +00001482
James Y Knighte7d82282015-12-29 18:15:14 +00001483 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1484 std::size_t Size =
1485 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1486 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1487 HasTemplateKWAndArgsInfo ? 1 : 0,
1488 targs ? targs->size() : 0);
Mike Stump11289f42009-09-09 15:08:12 +00001489
Benjamin Kramerc3f89252016-10-20 14:27:22 +00001490 void *Mem = C.Allocate(Size, alignof(MemberExpr));
Aaron Ballmanf4cb2be2015-03-24 15:07:53 +00001491 MemberExpr *E = new (Mem)
1492 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
John McCall16df1e52010-03-30 21:47:33 +00001493
1494 if (hasQualOrFound) {
Douglas Gregorea972d32011-02-28 21:54:11 +00001495 // FIXME: Wrong. We should be looking at the member declaration we found.
1496 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
John McCall16df1e52010-03-30 21:47:33 +00001497 E->setValueDependent(true);
1498 E->setTypeDependent(true);
Douglas Gregor678d76c2011-07-01 01:22:09 +00001499 E->setInstantiationDependent(true);
Fangrui Song6907ce22018-07-30 19:24:48 +00001500 }
1501 else if (QualifierLoc &&
1502 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
Douglas Gregor678d76c2011-07-01 01:22:09 +00001503 E->setInstantiationDependent(true);
Fangrui Song6907ce22018-07-30 19:24:48 +00001504
John McCall16df1e52010-03-30 21:47:33 +00001505 E->HasQualifierOrFoundDecl = true;
1506
James Y Knighte7d82282015-12-29 18:15:14 +00001507 MemberExprNameQualifier *NQ =
1508 E->getTrailingObjects<MemberExprNameQualifier>();
Douglas Gregorea972d32011-02-28 21:54:11 +00001509 NQ->QualifierLoc = QualifierLoc;
John McCall16df1e52010-03-30 21:47:33 +00001510 NQ->FoundDecl = founddecl;
1511 }
1512
Abramo Bagnara7945c982012-01-27 09:46:47 +00001513 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1514
John McCall16df1e52010-03-30 21:47:33 +00001515 if (targs) {
Douglas Gregor678d76c2011-07-01 01:22:09 +00001516 bool Dependent = false;
1517 bool InstantiationDependent = false;
1518 bool ContainsUnexpandedParameterPack = false;
James Y Knighte7d82282015-12-29 18:15:14 +00001519 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1520 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1521 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
Douglas Gregor678d76c2011-07-01 01:22:09 +00001522 if (InstantiationDependent)
1523 E->setInstantiationDependent(true);
Abramo Bagnara7945c982012-01-27 09:46:47 +00001524 } else if (TemplateKWLoc.isValid()) {
James Y Knighte7d82282015-12-29 18:15:14 +00001525 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1526 TemplateKWLoc);
John McCall16df1e52010-03-30 21:47:33 +00001527 }
1528
1529 return E;
Douglas Gregorf405d7e2009-08-31 23:41:50 +00001530}
1531
Daniel Dunbarb507f272012-03-09 15:39:15 +00001532SourceLocation MemberExpr::getLocStart() const {
Douglas Gregor25b7e052011-03-02 21:06:53 +00001533 if (isImplicitAccess()) {
1534 if (hasQualifier())
Daniel Dunbarb507f272012-03-09 15:39:15 +00001535 return getQualifierLoc().getBeginLoc();
1536 return MemberLoc;
Douglas Gregor25b7e052011-03-02 21:06:53 +00001537 }
Abramo Bagnara7945c982012-01-27 09:46:47 +00001538
Daniel Dunbarb507f272012-03-09 15:39:15 +00001539 // FIXME: We don't want this to happen. Rather, we should be able to
1540 // detect all kinds of implicit accesses more cleanly.
1541 SourceLocation BaseStartLoc = getBase()->getLocStart();
1542 if (BaseStartLoc.isValid())
1543 return BaseStartLoc;
1544 return MemberLoc;
1545}
1546SourceLocation MemberExpr::getLocEnd() const {
Abramo Bagnara9b836fb2012-11-08 13:52:58 +00001547 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
Daniel Dunbarb507f272012-03-09 15:39:15 +00001548 if (hasExplicitTemplateArgs())
Abramo Bagnara9b836fb2012-11-08 13:52:58 +00001549 EndLoc = getRAngleLoc();
1550 else if (EndLoc.isInvalid())
1551 EndLoc = getBase()->getLocEnd();
1552 return EndLoc;
Douglas Gregor25b7e052011-03-02 21:06:53 +00001553}
1554
Alp Tokerc1086762013-12-07 13:51:35 +00001555bool CastExpr::CastConsistency() const {
John McCall9320b872011-09-09 05:25:32 +00001556 switch (getCastKind()) {
1557 case CK_DerivedToBase:
1558 case CK_UncheckedDerivedToBase:
1559 case CK_DerivedToBaseMemberPointer:
1560 case CK_BaseToDerived:
1561 case CK_BaseToDerivedMemberPointer:
1562 assert(!path_empty() && "Cast kind should have a base path!");
1563 break;
1564
1565 case CK_CPointerToObjCPointerCast:
1566 assert(getType()->isObjCObjectPointerType());
1567 assert(getSubExpr()->getType()->isPointerType());
1568 goto CheckNoBasePath;
1569
1570 case CK_BlockPointerToObjCPointerCast:
1571 assert(getType()->isObjCObjectPointerType());
1572 assert(getSubExpr()->getType()->isBlockPointerType());
1573 goto CheckNoBasePath;
1574
John McCallc62bb392012-02-15 01:22:51 +00001575 case CK_ReinterpretMemberPointer:
1576 assert(getType()->isMemberPointerType());
1577 assert(getSubExpr()->getType()->isMemberPointerType());
1578 goto CheckNoBasePath;
1579
John McCall9320b872011-09-09 05:25:32 +00001580 case CK_BitCast:
1581 // Arbitrary casts to C pointer types count as bitcasts.
1582 // Otherwise, we should only have block and ObjC pointer casts
1583 // here if they stay within the type kind.
1584 if (!getType()->isPointerType()) {
Fangrui Song6907ce22018-07-30 19:24:48 +00001585 assert(getType()->isObjCObjectPointerType() ==
John McCall9320b872011-09-09 05:25:32 +00001586 getSubExpr()->getType()->isObjCObjectPointerType());
Fangrui Song6907ce22018-07-30 19:24:48 +00001587 assert(getType()->isBlockPointerType() ==
John McCall9320b872011-09-09 05:25:32 +00001588 getSubExpr()->getType()->isBlockPointerType());
1589 }
1590 goto CheckNoBasePath;
1591
1592 case CK_AnyPointerToBlockPointerCast:
1593 assert(getType()->isBlockPointerType());
1594 assert(getSubExpr()->getType()->isAnyPointerType() &&
1595 !getSubExpr()->getType()->isBlockPointerType());
1596 goto CheckNoBasePath;
1597
Douglas Gregored90df32012-02-22 05:02:47 +00001598 case CK_CopyAndAutoreleaseBlockObject:
1599 assert(getType()->isBlockPointerType());
1600 assert(getSubExpr()->getType()->isBlockPointerType());
1601 goto CheckNoBasePath;
Eli Friedman34866c72012-08-31 00:14:07 +00001602
1603 case CK_FunctionToPointerDecay:
1604 assert(getType()->isPointerType());
1605 assert(getSubExpr()->getType()->isFunctionType());
1606 goto CheckNoBasePath;
1607
David Tweede1468322013-12-11 13:39:46 +00001608 case CK_AddressSpaceConversion:
Anastasia Stulovaaf0a7bb2017-01-27 15:11:34 +00001609 assert(getType()->isPointerType() || getType()->isBlockPointerType());
1610 assert(getSubExpr()->getType()->isPointerType() ||
1611 getSubExpr()->getType()->isBlockPointerType());
David Tweede1468322013-12-11 13:39:46 +00001612 assert(getType()->getPointeeType().getAddressSpace() !=
1613 getSubExpr()->getType()->getPointeeType().getAddressSpace());
Galina Kistanovaf87496d2017-06-03 06:31:42 +00001614 LLVM_FALLTHROUGH;
John McCall9320b872011-09-09 05:25:32 +00001615 // These should not have an inheritance path.
1616 case CK_Dynamic:
1617 case CK_ToUnion:
1618 case CK_ArrayToPointerDecay:
John McCall9320b872011-09-09 05:25:32 +00001619 case CK_NullToMemberPointer:
1620 case CK_NullToPointer:
1621 case CK_ConstructorConversion:
1622 case CK_IntegralToPointer:
1623 case CK_PointerToIntegral:
1624 case CK_ToVoid:
1625 case CK_VectorSplat:
1626 case CK_IntegralCast:
George Burgess IVdf1ed002016-01-13 01:52:39 +00001627 case CK_BooleanToSignedIntegral:
John McCall9320b872011-09-09 05:25:32 +00001628 case CK_IntegralToFloating:
1629 case CK_FloatingToIntegral:
1630 case CK_FloatingCast:
1631 case CK_ObjCObjectLValueCast:
1632 case CK_FloatingRealToComplex:
1633 case CK_FloatingComplexToReal:
1634 case CK_FloatingComplexCast:
1635 case CK_FloatingComplexToIntegralComplex:
1636 case CK_IntegralRealToComplex:
1637 case CK_IntegralComplexToReal:
1638 case CK_IntegralComplexCast:
1639 case CK_IntegralComplexToFloatingComplex:
John McCall2d637d22011-09-10 06:18:15 +00001640 case CK_ARCProduceObject:
1641 case CK_ARCConsumeObject:
1642 case CK_ARCReclaimReturnedObject:
1643 case CK_ARCExtendBlockObject:
Guy Benyei1b4fb3e2013-01-20 12:31:11 +00001644 case CK_ZeroToOCLEvent:
Egor Churaev89831422016-12-23 14:55:49 +00001645 case CK_ZeroToOCLQueue:
Yaxun Liu0bc4b2d2016-07-28 19:26:30 +00001646 case CK_IntToOCLSampler:
John McCall9320b872011-09-09 05:25:32 +00001647 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1648 goto CheckNoBasePath;
1649
1650 case CK_Dependent:
1651 case CK_LValueToRValue:
John McCall9320b872011-09-09 05:25:32 +00001652 case CK_NoOp:
David Chisnallfa35df62012-01-16 17:27:18 +00001653 case CK_AtomicToNonAtomic:
1654 case CK_NonAtomicToAtomic:
John McCall9320b872011-09-09 05:25:32 +00001655 case CK_PointerToBoolean:
1656 case CK_IntegralToBoolean:
1657 case CK_FloatingToBoolean:
1658 case CK_MemberPointerToBoolean:
1659 case CK_FloatingComplexToBoolean:
1660 case CK_IntegralComplexToBoolean:
1661 case CK_LValueBitCast: // -> bool&
1662 case CK_UserDefinedConversion: // operator bool()
Eli Friedman34866c72012-08-31 00:14:07 +00001663 case CK_BuiltinFnToFnPtr:
John McCall9320b872011-09-09 05:25:32 +00001664 CheckNoBasePath:
1665 assert(path_empty() && "Cast kind should not have a base path!");
1666 break;
1667 }
Alp Tokerc1086762013-12-07 13:51:35 +00001668 return true;
John McCall9320b872011-09-09 05:25:32 +00001669}
1670
Eric Fiselier0683c0e2018-05-07 21:07:10 +00001671const char *CastExpr::getCastKindName(CastKind CK) {
1672 switch (CK) {
Etienne Bergeron5356d962016-05-12 20:58:56 +00001673#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1674#include "clang/AST/OperationKinds.def"
Anders Carlsson496335e2009-09-03 00:59:21 +00001675 }
John McCallc5e62b42010-11-13 09:02:35 +00001676 llvm_unreachable("Unhandled cast kind!");
Anders Carlsson496335e2009-09-03 00:59:21 +00001677}
1678
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001679namespace {
Richard Smith1ef75542018-06-27 20:30:34 +00001680 const Expr *skipImplicitTemporary(const Expr *E) {
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001681 // Skip through reference binding to temporary.
Richard Smith1ef75542018-06-27 20:30:34 +00001682 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1683 E = Materialize->GetTemporaryExpr();
Stephan Bergmannf31b0dc2017-06-27 08:19:09 +00001684
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001685 // Skip any temporary bindings; they're implicit.
Richard Smith1ef75542018-06-27 20:30:34 +00001686 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1687 E = Binder->getSubExpr();
Stephan Bergmannf31b0dc2017-06-27 08:19:09 +00001688
Richard Smith1ef75542018-06-27 20:30:34 +00001689 return E;
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001690 }
Stephan Bergmannf31b0dc2017-06-27 08:19:09 +00001691}
1692
Douglas Gregord196a582009-12-14 19:27:10 +00001693Expr *CastExpr::getSubExprAsWritten() {
Richard Smith1ef75542018-06-27 20:30:34 +00001694 const Expr *SubExpr = nullptr;
1695 const CastExpr *E = this;
Douglas Gregord196a582009-12-14 19:27:10 +00001696 do {
Stephan Bergmannf31b0dc2017-06-27 08:19:09 +00001697 SubExpr = skipImplicitTemporary(E->getSubExpr());
Douglas Gregorfe314812011-06-21 17:03:29 +00001698
Douglas Gregord196a582009-12-14 19:27:10 +00001699 // Conversions by constructor and conversion functions have a
1700 // subexpression describing the call; strip it off.
John McCalle3027922010-08-25 11:45:40 +00001701 if (E->getCastKind() == CK_ConstructorConversion)
Stephan Bergmannf31b0dc2017-06-27 08:19:09 +00001702 SubExpr =
1703 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
Manman Ren8abc2e52016-02-02 22:23:03 +00001704 else if (E->getCastKind() == CK_UserDefinedConversion) {
1705 assert((isa<CXXMemberCallExpr>(SubExpr) ||
1706 isa<BlockExpr>(SubExpr)) &&
1707 "Unexpected SubExpr for CK_UserDefinedConversion.");
Richard Smith1ef75542018-06-27 20:30:34 +00001708 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1709 SubExpr = MCE->getImplicitObjectArgument();
Manman Ren8abc2e52016-02-02 22:23:03 +00001710 }
Fangrui Song6907ce22018-07-30 19:24:48 +00001711
Douglas Gregord196a582009-12-14 19:27:10 +00001712 // If the subexpression we're left with is an implicit cast, look
1713 // through that, too.
Fangrui Song6907ce22018-07-30 19:24:48 +00001714 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1715
Richard Smith1ef75542018-06-27 20:30:34 +00001716 return const_cast<Expr*>(SubExpr);
1717}
1718
1719NamedDecl *CastExpr::getConversionFunction() const {
1720 const Expr *SubExpr = nullptr;
1721
1722 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1723 SubExpr = skipImplicitTemporary(E->getSubExpr());
1724
1725 if (E->getCastKind() == CK_ConstructorConversion)
1726 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1727
1728 if (E->getCastKind() == CK_UserDefinedConversion) {
1729 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1730 return MCE->getMethodDecl();
1731 }
1732 }
1733
1734 return nullptr;
Douglas Gregord196a582009-12-14 19:27:10 +00001735}
1736
Roman Lebedev4aaf1dc2018-08-01 06:06:16 +00001737CastExpr::BasePathSizeTy *CastExpr::BasePathSize() {
1738 assert(!path_empty());
1739 switch (getStmtClass()) {
1740#define ABSTRACT_STMT(x)
1741#define CASTEXPR(Type, Base) \
1742 case Stmt::Type##Class: \
1743 return static_cast<Type *>(this) \
1744 ->getTrailingObjects<CastExpr::BasePathSizeTy>();
1745#define STMT(Type, Base)
1746#include "clang/AST/StmtNodes.inc"
1747 default:
1748 llvm_unreachable("non-cast expressions not possible here");
1749 }
1750}
1751
John McCallcf142162010-08-07 06:22:56 +00001752CXXBaseSpecifier **CastExpr::path_buffer() {
1753 switch (getStmtClass()) {
1754#define ABSTRACT_STMT(x)
James Y Knight1d75c5e2015-12-30 02:27:28 +00001755#define CASTEXPR(Type, Base) \
1756 case Stmt::Type##Class: \
1757 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
John McCallcf142162010-08-07 06:22:56 +00001758#define STMT(Type, Base)
1759#include "clang/AST/StmtNodes.inc"
1760 default:
1761 llvm_unreachable("non-cast expressions not possible here");
John McCallcf142162010-08-07 06:22:56 +00001762 }
1763}
1764
John McCallf1ef7962017-08-15 21:42:47 +00001765const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1766 QualType opType) {
1767 auto RD = unionType->castAs<RecordType>()->getDecl();
1768 return getTargetFieldForToUnionCast(RD, opType);
1769}
1770
1771const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1772 QualType OpType) {
1773 auto &Ctx = RD->getASTContext();
1774 RecordDecl::field_iterator Field, FieldEnd;
1775 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1776 Field != FieldEnd; ++Field) {
1777 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1778 !Field->isUnnamedBitfield()) {
1779 return *Field;
1780 }
1781 }
1782 return nullptr;
1783}
1784
Craig Topper37932912013-08-18 10:09:15 +00001785ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
John McCallcf142162010-08-07 06:22:56 +00001786 CastKind Kind, Expr *Operand,
1787 const CXXCastPath *BasePath,
John McCall2536c6d2010-08-25 10:28:54 +00001788 ExprValueKind VK) {
John McCallcf142162010-08-07 06:22:56 +00001789 unsigned PathSize = (BasePath ? BasePath->size() : 0);
Roman Lebedev4aaf1dc2018-08-01 06:06:16 +00001790 void *Buffer =
1791 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1792 PathSize ? 1 : 0, PathSize));
John McCallcf142162010-08-07 06:22:56 +00001793 ImplicitCastExpr *E =
John McCall2536c6d2010-08-25 10:28:54 +00001794 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
James Y Knight1d75c5e2015-12-30 02:27:28 +00001795 if (PathSize)
1796 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1797 E->getTrailingObjects<CXXBaseSpecifier *>());
John McCallcf142162010-08-07 06:22:56 +00001798 return E;
1799}
1800
Craig Topper37932912013-08-18 10:09:15 +00001801ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
John McCallcf142162010-08-07 06:22:56 +00001802 unsigned PathSize) {
Roman Lebedev4aaf1dc2018-08-01 06:06:16 +00001803 void *Buffer =
1804 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1805 PathSize ? 1 : 0, PathSize));
John McCallcf142162010-08-07 06:22:56 +00001806 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1807}
1808
1809
Craig Topper37932912013-08-18 10:09:15 +00001810CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
John McCall7decc9e2010-11-18 06:31:45 +00001811 ExprValueKind VK, CastKind K, Expr *Op,
John McCallcf142162010-08-07 06:22:56 +00001812 const CXXCastPath *BasePath,
1813 TypeSourceInfo *WrittenTy,
1814 SourceLocation L, SourceLocation R) {
1815 unsigned PathSize = (BasePath ? BasePath->size() : 0);
Roman Lebedev4aaf1dc2018-08-01 06:06:16 +00001816 void *Buffer =
1817 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1818 PathSize ? 1 : 0, PathSize));
John McCallcf142162010-08-07 06:22:56 +00001819 CStyleCastExpr *E =
John McCall7decc9e2010-11-18 06:31:45 +00001820 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
James Y Knight1d75c5e2015-12-30 02:27:28 +00001821 if (PathSize)
1822 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1823 E->getTrailingObjects<CXXBaseSpecifier *>());
John McCallcf142162010-08-07 06:22:56 +00001824 return E;
1825}
1826
Craig Topper37932912013-08-18 10:09:15 +00001827CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1828 unsigned PathSize) {
Roman Lebedev4aaf1dc2018-08-01 06:06:16 +00001829 void *Buffer =
1830 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1831 PathSize ? 1 : 0, PathSize));
John McCallcf142162010-08-07 06:22:56 +00001832 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1833}
1834
Chris Lattner1b926492006-08-23 06:42:10 +00001835/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1836/// corresponds to, e.g. "<<=".
David Blaikie1d202a62012-10-08 01:11:04 +00001837StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
Chris Lattner1b926492006-08-23 06:42:10 +00001838 switch (Op) {
Etienne Bergeron5356d962016-05-12 20:58:56 +00001839#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1840#include "clang/AST/OperationKinds.def"
Chris Lattner1b926492006-08-23 06:42:10 +00001841 }
David Blaikiee4d798f2012-01-20 21:50:17 +00001842 llvm_unreachable("Invalid OpCode!");
Chris Lattner1b926492006-08-23 06:42:10 +00001843}
Steve Naroff47500512007-04-19 23:00:49 +00001844
John McCalle3027922010-08-25 11:45:40 +00001845BinaryOperatorKind
Douglas Gregor1baf54e2009-03-13 18:40:31 +00001846BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1847 switch (OO) {
David Blaikie83d382b2011-09-23 05:06:16 +00001848 default: llvm_unreachable("Not an overloadable binary operator");
John McCalle3027922010-08-25 11:45:40 +00001849 case OO_Plus: return BO_Add;
1850 case OO_Minus: return BO_Sub;
1851 case OO_Star: return BO_Mul;
1852 case OO_Slash: return BO_Div;
1853 case OO_Percent: return BO_Rem;
1854 case OO_Caret: return BO_Xor;
1855 case OO_Amp: return BO_And;
1856 case OO_Pipe: return BO_Or;
1857 case OO_Equal: return BO_Assign;
Richard Smithc70f1d62017-12-14 15:16:18 +00001858 case OO_Spaceship: return BO_Cmp;
John McCalle3027922010-08-25 11:45:40 +00001859 case OO_Less: return BO_LT;
1860 case OO_Greater: return BO_GT;
1861 case OO_PlusEqual: return BO_AddAssign;
1862 case OO_MinusEqual: return BO_SubAssign;
1863 case OO_StarEqual: return BO_MulAssign;
1864 case OO_SlashEqual: return BO_DivAssign;
1865 case OO_PercentEqual: return BO_RemAssign;
1866 case OO_CaretEqual: return BO_XorAssign;
1867 case OO_AmpEqual: return BO_AndAssign;
1868 case OO_PipeEqual: return BO_OrAssign;
1869 case OO_LessLess: return BO_Shl;
1870 case OO_GreaterGreater: return BO_Shr;
1871 case OO_LessLessEqual: return BO_ShlAssign;
1872 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1873 case OO_EqualEqual: return BO_EQ;
1874 case OO_ExclaimEqual: return BO_NE;
1875 case OO_LessEqual: return BO_LE;
1876 case OO_GreaterEqual: return BO_GE;
1877 case OO_AmpAmp: return BO_LAnd;
1878 case OO_PipePipe: return BO_LOr;
1879 case OO_Comma: return BO_Comma;
1880 case OO_ArrowStar: return BO_PtrMemI;
Douglas Gregor1baf54e2009-03-13 18:40:31 +00001881 }
1882}
1883
1884OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1885 static const OverloadedOperatorKind OverOps[] = {
1886 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1887 OO_Star, OO_Slash, OO_Percent,
1888 OO_Plus, OO_Minus,
1889 OO_LessLess, OO_GreaterGreater,
Richard Smithc70f1d62017-12-14 15:16:18 +00001890 OO_Spaceship,
Douglas Gregor1baf54e2009-03-13 18:40:31 +00001891 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1892 OO_EqualEqual, OO_ExclaimEqual,
1893 OO_Amp,
1894 OO_Caret,
1895 OO_Pipe,
1896 OO_AmpAmp,
1897 OO_PipePipe,
1898 OO_Equal, OO_StarEqual,
1899 OO_SlashEqual, OO_PercentEqual,
1900 OO_PlusEqual, OO_MinusEqual,
1901 OO_LessLessEqual, OO_GreaterGreaterEqual,
1902 OO_AmpEqual, OO_CaretEqual,
1903 OO_PipeEqual,
1904 OO_Comma
1905 };
1906 return OverOps[Opc];
1907}
1908
Andrew Kaylor3d0a5402017-09-19 20:26:40 +00001909bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
1910 Opcode Opc,
1911 Expr *LHS, Expr *RHS) {
1912 if (Opc != BO_Add)
1913 return false;
1914
1915 // Check that we have one pointer and one integer operand.
1916 Expr *PExp;
Andrew Kaylor3d0a5402017-09-19 20:26:40 +00001917 if (LHS->getType()->isPointerType()) {
1918 if (!RHS->getType()->isIntegerType())
1919 return false;
1920 PExp = LHS;
Andrew Kaylor3d0a5402017-09-19 20:26:40 +00001921 } else if (RHS->getType()->isPointerType()) {
1922 if (!LHS->getType()->isIntegerType())
1923 return false;
1924 PExp = RHS;
Andrew Kaylor3d0a5402017-09-19 20:26:40 +00001925 } else {
1926 return false;
1927 }
1928
1929 // Check that the pointer is a nullptr.
1930 if (!PExp->IgnoreParenCasts()
1931 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
1932 return false;
1933
1934 // Check that the pointee type is char-sized.
1935 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
1936 if (!PTy || !PTy->getPointeeType()->isCharType())
1937 return false;
1938
Andrew Kaylor3d0a5402017-09-19 20:26:40 +00001939 return true;
1940}
Craig Topper37932912013-08-18 10:09:15 +00001941InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
Benjamin Kramerc215e762012-08-24 11:54:20 +00001942 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00001943 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1944 false, false),
1945 InitExprs(C, initExprs.size()),
1946 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1947{
Sebastian Redlc83ed822012-02-17 08:42:25 +00001948 sawArrayRangeDesignator(false);
Benjamin Kramerc215e762012-08-24 11:54:20 +00001949 for (unsigned I = 0; I != initExprs.size(); ++I) {
Ted Kremenek013041e2010-02-19 01:50:18 +00001950 if (initExprs[I]->isTypeDependent())
John McCall925b16622010-10-26 08:39:16 +00001951 ExprBits.TypeDependent = true;
Ted Kremenek013041e2010-02-19 01:50:18 +00001952 if (initExprs[I]->isValueDependent())
John McCall925b16622010-10-26 08:39:16 +00001953 ExprBits.ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +00001954 if (initExprs[I]->isInstantiationDependent())
1955 ExprBits.InstantiationDependent = true;
Douglas Gregora6e053e2010-12-15 01:34:56 +00001956 if (initExprs[I]->containsUnexpandedParameterPack())
1957 ExprBits.ContainsUnexpandedParameterPack = true;
Douglas Gregordeebf6e2009-11-19 23:25:22 +00001958 }
Fangrui Song6907ce22018-07-30 19:24:48 +00001959
Benjamin Kramerc215e762012-08-24 11:54:20 +00001960 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
Anders Carlsson4692db02007-08-31 04:56:16 +00001961}
Chris Lattner1ec5f562007-06-27 05:38:08 +00001962
Craig Topper37932912013-08-18 10:09:15 +00001963void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
Ted Kremenek013041e2010-02-19 01:50:18 +00001964 if (NumInits > InitExprs.size())
Ted Kremenekac034612010-04-13 23:39:13 +00001965 InitExprs.reserve(C, NumInits);
Douglas Gregor6d00c992009-03-20 23:58:33 +00001966}
1967
Craig Topper37932912013-08-18 10:09:15 +00001968void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
Craig Topper36250ad2014-05-12 05:36:57 +00001969 InitExprs.resize(C, NumInits, nullptr);
Douglas Gregor347f7ea2009-01-28 21:54:33 +00001970}
1971
Craig Topper37932912013-08-18 10:09:15 +00001972Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
Ted Kremenek013041e2010-02-19 01:50:18 +00001973 if (Init >= InitExprs.size()) {
Craig Topper36250ad2014-05-12 05:36:57 +00001974 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
Richard Smithc275da62013-12-06 01:27:24 +00001975 setInit(Init, expr);
Craig Topper36250ad2014-05-12 05:36:57 +00001976 return nullptr;
Douglas Gregor347f7ea2009-01-28 21:54:33 +00001977 }
Mike Stump11289f42009-09-09 15:08:12 +00001978
Douglas Gregor347f7ea2009-01-28 21:54:33 +00001979 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
Richard Smithc275da62013-12-06 01:27:24 +00001980 setInit(Init, expr);
Douglas Gregor347f7ea2009-01-28 21:54:33 +00001981 return Result;
1982}
1983
Argyrios Kyrtzidis446bcf22011-04-21 20:03:38 +00001984void InitListExpr::setArrayFiller(Expr *filler) {
Argyrios Kyrtzidisd4590a5d2011-10-21 23:02:22 +00001985 assert(!hasArrayFiller() && "Filler already set!");
Argyrios Kyrtzidis446bcf22011-04-21 20:03:38 +00001986 ArrayFillerOrUnionFieldInit = filler;
1987 // Fill out any "holes" in the array due to designated initializers.
1988 Expr **inits = getInits();
1989 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
Craig Topper36250ad2014-05-12 05:36:57 +00001990 if (inits[i] == nullptr)
Argyrios Kyrtzidis446bcf22011-04-21 20:03:38 +00001991 inits[i] = filler;
1992}
1993
Richard Smith9ec1e482012-04-15 02:50:59 +00001994bool InitListExpr::isStringLiteralInit() const {
1995 if (getNumInits() != 1)
1996 return false;
Eli Friedmancf4ab082012-08-20 20:55:45 +00001997 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1998 if (!AT || !AT->getElementType()->isIntegerType())
Richard Smith9ec1e482012-04-15 02:50:59 +00001999 return false;
Ted Kremenek256bd962014-01-19 06:31:34 +00002000 // It is possible for getInit() to return null.
2001 const Expr *Init = getInit(0);
2002 if (!Init)
2003 return false;
2004 Init = Init->IgnoreParens();
Richard Smith9ec1e482012-04-15 02:50:59 +00002005 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2006}
2007
Richard Smith122f88d2016-12-06 23:52:28 +00002008bool InitListExpr::isTransparent() const {
2009 assert(isSemanticForm() && "syntactic form never semantically transparent");
2010
2011 // A glvalue InitListExpr is always just sugar.
2012 if (isGLValue()) {
2013 assert(getNumInits() == 1 && "multiple inits in glvalue init list");
2014 return true;
2015 }
2016
2017 // Otherwise, we're sugar if and only if we have exactly one initializer that
2018 // is of the same type.
2019 if (getNumInits() != 1 || !getInit(0))
2020 return false;
2021
Richard Smith382bc512017-02-23 22:41:47 +00002022 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2023 // transparent struct copy.
2024 if (!getInit(0)->isRValue() && getType()->isRecordType())
2025 return false;
2026
Richard Smith122f88d2016-12-06 23:52:28 +00002027 return getType().getCanonicalType() ==
2028 getInit(0)->getType().getCanonicalType();
2029}
2030
Daniel Marjamaki817a3bf2017-09-29 09:44:41 +00002031bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2032 assert(isSyntacticForm() && "only test syntactic form as zero initializer");
2033
2034 if (LangOpts.CPlusPlus || getNumInits() != 1) {
2035 return false;
2036 }
2037
2038 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0));
2039 return Lit && Lit->getValue() == 0;
2040}
2041
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002042SourceLocation InitListExpr::getLocStart() const {
Abramo Bagnara8d16bd42012-11-08 18:41:43 +00002043 if (InitListExpr *SyntacticForm = getSyntacticForm())
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002044 return SyntacticForm->getLocStart();
2045 SourceLocation Beg = LBraceLoc;
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002046 if (Beg.isInvalid()) {
2047 // Find the first non-null initializer.
2048 for (InitExprsTy::const_iterator I = InitExprs.begin(),
Fangrui Song6907ce22018-07-30 19:24:48 +00002049 E = InitExprs.end();
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002050 I != E; ++I) {
2051 if (Stmt *S = *I) {
2052 Beg = S->getLocStart();
2053 break;
Fangrui Song6907ce22018-07-30 19:24:48 +00002054 }
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002055 }
2056 }
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002057 return Beg;
2058}
2059
2060SourceLocation InitListExpr::getLocEnd() const {
2061 if (InitListExpr *SyntacticForm = getSyntacticForm())
2062 return SyntacticForm->getLocEnd();
2063 SourceLocation End = RBraceLoc;
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002064 if (End.isInvalid()) {
2065 // Find the first non-null initializer from the end.
2066 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002067 E = InitExprs.rend();
2068 I != E; ++I) {
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002069 if (Stmt *S = *I) {
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002070 End = S->getLocEnd();
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002071 break;
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002072 }
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002073 }
2074 }
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00002075 return End;
Ted Kremenek16e6026f2010-11-09 02:11:40 +00002076}
2077
Steve Naroff991e99d2008-09-04 15:31:07 +00002078/// getFunctionType - Return the underlying function type for this block.
Eugene Zelenkoae304b02017-11-17 18:09:48 +00002079///
John McCallc833dea2012-02-17 03:32:35 +00002080const FunctionProtoType *BlockExpr::getFunctionType() const {
2081 // The block pointer is never sugared, but the function type might be.
2082 return cast<BlockPointerType>(getType())
2083 ->getPointeeType()->castAs<FunctionProtoType>();
Steve Naroffc540d662008-09-03 18:15:37 +00002084}
2085
Mike Stump11289f42009-09-09 15:08:12 +00002086SourceLocation BlockExpr::getCaretLocation() const {
2087 return TheBlock->getCaretLocation();
Steve Naroff415d3d52008-10-08 17:01:13 +00002088}
Mike Stump11289f42009-09-09 15:08:12 +00002089const Stmt *BlockExpr::getBody() const {
Douglas Gregore3dcb2d2009-04-18 00:02:19 +00002090 return TheBlock->getBody();
2091}
Mike Stump11289f42009-09-09 15:08:12 +00002092Stmt *BlockExpr::getBody() {
2093 return TheBlock->getBody();
Douglas Gregore3dcb2d2009-04-18 00:02:19 +00002094}
Steve Naroff415d3d52008-10-08 17:01:13 +00002095
Eugene Zelenkoae304b02017-11-17 18:09:48 +00002096
Chris Lattner1ec5f562007-06-27 05:38:08 +00002097//===----------------------------------------------------------------------===//
2098// Generic Expression Routines
2099//===----------------------------------------------------------------------===//
2100
Chris Lattner237f2752009-02-14 07:37:35 +00002101/// isUnusedResultAWarning - Return true if this immediate expression should
2102/// be warned about if the result is unused. If so, fill in Loc and Ranges
2103/// with location to warn on and the source range[s] to report with the
2104/// warning.
Fangrui Song6907ce22018-07-30 19:24:48 +00002105bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
Eli Friedmanc11535c2012-05-24 00:47:05 +00002106 SourceRange &R1, SourceRange &R2,
2107 ASTContext &Ctx) const {
Anders Carlsson789e2cc2009-05-15 23:10:19 +00002108 // Don't warn if the expr is type dependent. The type could end up
2109 // instantiating to void.
2110 if (isTypeDependent())
2111 return false;
Mike Stump11289f42009-09-09 15:08:12 +00002112
Chris Lattner1ec5f562007-06-27 05:38:08 +00002113 switch (getStmtClass()) {
2114 default:
John McCallc493a732010-03-12 07:11:26 +00002115 if (getType()->isVoidType())
2116 return false;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002117 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002118 Loc = getExprLoc();
2119 R1 = getSourceRange();
2120 return true;
Chris Lattner1ec5f562007-06-27 05:38:08 +00002121 case ParenExprClass:
Chris Lattner237f2752009-02-14 07:37:35 +00002122 return cast<ParenExpr>(this)->getSubExpr()->
Eli Friedmanc11535c2012-05-24 00:47:05 +00002123 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Peter Collingbourne91147592011-04-15 00:35:48 +00002124 case GenericSelectionExprClass:
2125 return cast<GenericSelectionExpr>(this)->getResultExpr()->
Eli Friedmanc11535c2012-05-24 00:47:05 +00002126 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Eric Fiselier16269a82018-03-27 00:58:16 +00002127 case CoawaitExprClass:
Eric Fiselier855c0922018-03-27 03:33:06 +00002128 case CoyieldExprClass:
2129 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
Eric Fiselier16269a82018-03-27 00:58:16 +00002130 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Eli Friedman75807f22013-07-20 00:40:58 +00002131 case ChooseExprClass:
2132 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2133 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Chris Lattner1ec5f562007-06-27 05:38:08 +00002134 case UnaryOperatorClass: {
2135 const UnaryOperator *UO = cast<UnaryOperator>(this);
Mike Stump11289f42009-09-09 15:08:12 +00002136
Chris Lattner1ec5f562007-06-27 05:38:08 +00002137 switch (UO->getOpcode()) {
Eli Friedmanc11535c2012-05-24 00:47:05 +00002138 case UO_Plus:
2139 case UO_Minus:
2140 case UO_AddrOf:
2141 case UO_Not:
2142 case UO_LNot:
2143 case UO_Deref:
2144 break;
Richard Smith9f690bd2015-10-27 06:02:45 +00002145 case UO_Coawait:
2146 // This is just the 'operator co_await' call inside the guts of a
2147 // dependent co_await call.
John McCalle3027922010-08-25 11:45:40 +00002148 case UO_PostInc:
2149 case UO_PostDec:
2150 case UO_PreInc:
2151 case UO_PreDec: // ++/--
Chris Lattner237f2752009-02-14 07:37:35 +00002152 return false; // Not a warning.
John McCalle3027922010-08-25 11:45:40 +00002153 case UO_Real:
2154 case UO_Imag:
Chris Lattnera44d1162007-06-27 05:58:59 +00002155 // accessing a piece of a volatile complex is a side-effect.
Mike Stump53f9ded2009-11-03 23:25:48 +00002156 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2157 .isVolatileQualified())
Chris Lattner237f2752009-02-14 07:37:35 +00002158 return false;
2159 break;
John McCalle3027922010-08-25 11:45:40 +00002160 case UO_Extension:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002161 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Chris Lattner1ec5f562007-06-27 05:38:08 +00002162 }
Eli Friedmanc11535c2012-05-24 00:47:05 +00002163 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002164 Loc = UO->getOperatorLoc();
2165 R1 = UO->getSubExpr()->getSourceRange();
2166 return true;
Chris Lattner1ec5f562007-06-27 05:38:08 +00002167 }
Chris Lattnerae7a8342007-12-01 06:07:34 +00002168 case BinaryOperatorClass: {
Chris Lattner237f2752009-02-14 07:37:35 +00002169 const BinaryOperator *BO = cast<BinaryOperator>(this);
Ted Kremenek43a9c962010-04-07 18:49:21 +00002170 switch (BO->getOpcode()) {
2171 default:
2172 break;
Argyrios Kyrtzidis639ffb02010-06-30 10:53:14 +00002173 // Consider the RHS of comma for side effects. LHS was checked by
2174 // Sema::CheckCommaOperands.
John McCalle3027922010-08-25 11:45:40 +00002175 case BO_Comma:
Ted Kremenek43a9c962010-04-07 18:49:21 +00002176 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2177 // lvalue-ness) of an assignment written in a macro.
2178 if (IntegerLiteral *IE =
2179 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2180 if (IE->getValue() == 0)
2181 return false;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002182 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Argyrios Kyrtzidis639ffb02010-06-30 10:53:14 +00002183 // Consider '||', '&&' to have side effects if the LHS or RHS does.
John McCalle3027922010-08-25 11:45:40 +00002184 case BO_LAnd:
2185 case BO_LOr:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002186 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2187 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
Argyrios Kyrtzidis639ffb02010-06-30 10:53:14 +00002188 return false;
2189 break;
John McCall1e3715a2010-02-16 04:10:53 +00002190 }
Chris Lattner237f2752009-02-14 07:37:35 +00002191 if (BO->isAssignmentOp())
2192 return false;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002193 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002194 Loc = BO->getOperatorLoc();
2195 R1 = BO->getLHS()->getSourceRange();
2196 R2 = BO->getRHS()->getSourceRange();
2197 return true;
Chris Lattnerae7a8342007-12-01 06:07:34 +00002198 }
Chris Lattner86928112007-08-25 02:00:02 +00002199 case CompoundAssignOperatorClass:
Douglas Gregor0bbe94d2010-05-08 22:41:50 +00002200 case VAArgExprClass:
Eli Friedmandf14b3a2011-10-11 02:20:01 +00002201 case AtomicExprClass:
Chris Lattner237f2752009-02-14 07:37:35 +00002202 return false;
Chris Lattner1ec5f562007-06-27 05:38:08 +00002203
Fariborz Jahanian9fac54d2007-12-01 19:58:28 +00002204 case ConditionalOperatorClass: {
Ted Kremeneke96dad92011-03-01 20:34:48 +00002205 // If only one of the LHS or RHS is a warning, the operator might
2206 // be being used for control flow. Only warn if both the LHS and
2207 // RHS are warnings.
Fariborz Jahanian9fac54d2007-12-01 19:58:28 +00002208 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
Eli Friedmanc11535c2012-05-24 00:47:05 +00002209 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
Ted Kremeneke96dad92011-03-01 20:34:48 +00002210 return false;
2211 if (!Exp->getLHS())
Chris Lattner237f2752009-02-14 07:37:35 +00002212 return true;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002213 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Fariborz Jahanian9fac54d2007-12-01 19:58:28 +00002214 }
2215
Chris Lattnera44d1162007-06-27 05:58:59 +00002216 case MemberExprClass:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002217 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002218 Loc = cast<MemberExpr>(this)->getMemberLoc();
2219 R1 = SourceRange(Loc, Loc);
2220 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2221 return true;
Mike Stump11289f42009-09-09 15:08:12 +00002222
Chris Lattner1ec5f562007-06-27 05:38:08 +00002223 case ArraySubscriptExprClass:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002224 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002225 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2226 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2227 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2228 return true;
Eli Friedman824f8c12008-05-27 15:24:04 +00002229
Chandler Carruth46339472011-08-17 09:49:44 +00002230 case CXXOperatorCallExprClass: {
Richard Trieu99e1c952014-03-11 03:11:08 +00002231 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
Chandler Carruth46339472011-08-17 09:49:44 +00002232 // overloads as there is no reasonable way to define these such that they
2233 // have non-trivial, desirable side-effects. See the -Wunused-comparison
Richard Trieu99e1c952014-03-11 03:11:08 +00002234 // warning: operators == and != are commonly typo'ed, and so warning on them
Chandler Carruth46339472011-08-17 09:49:44 +00002235 // provides additional value as well. If this list is updated,
2236 // DiagnoseUnusedComparison should be as well.
2237 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
Richard Trieu99e1c952014-03-11 03:11:08 +00002238 switch (Op->getOperator()) {
2239 default:
2240 break;
2241 case OO_EqualEqual:
2242 case OO_ExclaimEqual:
2243 case OO_Less:
2244 case OO_Greater:
2245 case OO_GreaterEqual:
2246 case OO_LessEqual:
David Majnemerced8bdf2015-02-25 17:36:15 +00002247 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2248 Op->getCallReturnType(Ctx)->isVoidType())
Richard Trieu161132b2014-05-14 23:22:10 +00002249 break;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002250 WarnE = this;
Matt Beaumont-Gaydcaacaa2011-09-19 18:51:20 +00002251 Loc = Op->getOperatorLoc();
2252 R1 = Op->getSourceRange();
Chandler Carruth46339472011-08-17 09:49:44 +00002253 return true;
Matt Beaumont-Gaydcaacaa2011-09-19 18:51:20 +00002254 }
Chandler Carruth46339472011-08-17 09:49:44 +00002255
2256 // Fallthrough for generic call handling.
Galina Kistanovaf87496d2017-06-03 06:31:42 +00002257 LLVM_FALLTHROUGH;
Chandler Carruth46339472011-08-17 09:49:44 +00002258 }
Chris Lattner1ec5f562007-06-27 05:38:08 +00002259 case CallExprClass:
Richard Smithc67fdd42012-03-07 08:35:16 +00002260 case CXXMemberCallExprClass:
2261 case UserDefinedLiteralClass: {
Chris Lattner237f2752009-02-14 07:37:35 +00002262 // If this is a direct call, get the callee.
2263 const CallExpr *CE = cast<CallExpr>(this);
Nuno Lopes518e3702009-12-20 23:11:08 +00002264 if (const Decl *FD = CE->getCalleeDecl()) {
Kaelyn Takata0a2e84c2015-04-09 19:43:04 +00002265 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2266 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2267 : FD->hasAttr<WarnUnusedResultAttr>();
2268
Chris Lattner237f2752009-02-14 07:37:35 +00002269 // If the callee has attribute pure, const, or warn_unused_result, warn
2270 // about it. void foo() { strlen("bar"); } should warn.
Chris Lattner1a6babf2009-10-13 04:53:48 +00002271 //
2272 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2273 // updated to match for QoI.
Kaelyn Takata0a2e84c2015-04-09 19:43:04 +00002274 if (HasWarnUnusedResultAttr ||
Aaron Ballman9ead1242013-12-19 02:39:40 +00002275 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
Eli Friedmanc11535c2012-05-24 00:47:05 +00002276 WarnE = this;
Chris Lattner1a6babf2009-10-13 04:53:48 +00002277 Loc = CE->getCallee()->getLocStart();
2278 R1 = CE->getCallee()->getSourceRange();
Mike Stump11289f42009-09-09 15:08:12 +00002279
Chris Lattner1a6babf2009-10-13 04:53:48 +00002280 if (unsigned NumArgs = CE->getNumArgs())
2281 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2282 CE->getArg(NumArgs-1)->getLocEnd());
2283 return true;
2284 }
Chris Lattner237f2752009-02-14 07:37:35 +00002285 }
2286 return false;
2287 }
Anders Carlsson6aa50392009-11-17 17:11:23 +00002288
Matt Beaumont-Gayabf836c2012-10-23 06:15:26 +00002289 // If we don't know precisely what we're looking at, let's not warn.
2290 case UnresolvedLookupExprClass:
2291 case CXXUnresolvedConstructExprClass:
2292 return false;
2293
Anders Carlsson6aa50392009-11-17 17:11:23 +00002294 case CXXTemporaryObjectExprClass:
Eugene Zelenkoae304b02017-11-17 18:09:48 +00002295 case CXXConstructExprClass: {
Lubos Lunak1f490f32013-07-21 13:15:58 +00002296 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2297 if (Type->hasAttr<WarnUnusedAttr>()) {
2298 WarnE = this;
2299 Loc = getLocStart();
2300 R1 = getSourceRange();
2301 return true;
2302 }
2303 }
Anders Carlsson6aa50392009-11-17 17:11:23 +00002304 return false;
Eugene Zelenkoae304b02017-11-17 18:09:48 +00002305 }
Anders Carlsson6aa50392009-11-17 17:11:23 +00002306
Fariborz Jahanian5cab26d2010-03-30 18:22:15 +00002307 case ObjCMessageExprClass: {
2308 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
David Blaikiebbafb8a2012-03-11 07:00:24 +00002309 if (Ctx.getLangOpts().ObjCAutoRefCount &&
John McCall31168b02011-06-15 23:02:42 +00002310 ME->isInstanceMessage() &&
2311 !ME->getType()->isVoidType() &&
Jean-Daniel Dupas06028a52013-07-19 20:25:56 +00002312 ME->getMethodFamily() == OMF_init) {
Eli Friedmanc11535c2012-05-24 00:47:05 +00002313 WarnE = this;
John McCall31168b02011-06-15 23:02:42 +00002314 Loc = getExprLoc();
2315 R1 = ME->getSourceRange();
2316 return true;
2317 }
2318
Fariborz Jahanianac6b4ef2014-07-18 22:59:10 +00002319 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
Fariborz Jahanianb0553e22015-02-16 23:49:44 +00002320 if (MD->hasAttr<WarnUnusedResultAttr>()) {
Fariborz Jahanianac6b4ef2014-07-18 22:59:10 +00002321 WarnE = this;
2322 Loc = getExprLoc();
2323 return true;
2324 }
2325
Chris Lattner237f2752009-02-14 07:37:35 +00002326 return false;
Fariborz Jahanian5cab26d2010-03-30 18:22:15 +00002327 }
Mike Stump11289f42009-09-09 15:08:12 +00002328
John McCallb7bd14f2010-12-02 01:19:52 +00002329 case ObjCPropertyRefExprClass:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002330 WarnE = this;
Chris Lattnerd37f61c2009-08-16 16:51:50 +00002331 Loc = getExprLoc();
2332 R1 = getSourceRange();
Chris Lattnerd8b800a2009-08-16 16:45:18 +00002333 return true;
John McCallb7bd14f2010-12-02 01:19:52 +00002334
John McCallfe96e0b2011-11-06 09:01:30 +00002335 case PseudoObjectExprClass: {
2336 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2337
2338 // Only complain about things that have the form of a getter.
2339 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2340 isa<BinaryOperator>(PO->getSyntacticForm()))
2341 return false;
2342
Eli Friedmanc11535c2012-05-24 00:47:05 +00002343 WarnE = this;
John McCallfe96e0b2011-11-06 09:01:30 +00002344 Loc = getExprLoc();
2345 R1 = getSourceRange();
2346 return true;
2347 }
2348
Chris Lattner944d3062008-07-26 19:51:01 +00002349 case StmtExprClass: {
2350 // Statement exprs don't logically have side effects themselves, but are
2351 // sometimes used in macros in ways that give them a type that is unused.
2352 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2353 // however, if the result of the stmt expr is dead, we don't want to emit a
2354 // warning.
2355 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
Argyrios Kyrtzidis90963412010-09-19 21:21:10 +00002356 if (!CS->body_empty()) {
Chris Lattner944d3062008-07-26 19:51:01 +00002357 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
Eli Friedmanc11535c2012-05-24 00:47:05 +00002358 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Argyrios Kyrtzidis90963412010-09-19 21:21:10 +00002359 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2360 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
Eli Friedmanc11535c2012-05-24 00:47:05 +00002361 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Argyrios Kyrtzidis90963412010-09-19 21:21:10 +00002362 }
Mike Stump11289f42009-09-09 15:08:12 +00002363
John McCallc493a732010-03-12 07:11:26 +00002364 if (getType()->isVoidType())
2365 return false;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002366 WarnE = this;
Chris Lattner237f2752009-02-14 07:37:35 +00002367 Loc = cast<StmtExpr>(this)->getLParenLoc();
2368 R1 = getSourceRange();
2369 return true;
Chris Lattner944d3062008-07-26 19:51:01 +00002370 }
Eli Friedmanbdd57532012-09-24 23:02:26 +00002371 case CXXFunctionalCastExprClass:
Eli Friedmanc11535c2012-05-24 00:47:05 +00002372 case CStyleCastExprClass: {
Eli Friedmanf92f6452012-05-24 21:05:41 +00002373 // Ignore an explicit cast to void unless the operand is a non-trivial
Eli Friedmanc11535c2012-05-24 00:47:05 +00002374 // volatile lvalue.
Eli Friedmanf92f6452012-05-24 21:05:41 +00002375 const CastExpr *CE = cast<CastExpr>(this);
Eli Friedmanc11535c2012-05-24 00:47:05 +00002376 if (CE->getCastKind() == CK_ToVoid) {
2377 if (CE->getSubExpr()->isGLValue() &&
Eli Friedmanf92f6452012-05-24 21:05:41 +00002378 CE->getSubExpr()->getType().isVolatileQualified()) {
2379 const DeclRefExpr *DRE =
2380 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2381 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
Erich Keane80b0fb02017-10-19 15:58:58 +00002382 cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
2383 !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
Eli Friedmanf92f6452012-05-24 21:05:41 +00002384 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2385 R1, R2, Ctx);
2386 }
2387 }
Chris Lattner2706a552009-07-28 18:25:28 +00002388 return false;
Eli Friedmanc11535c2012-05-24 00:47:05 +00002389 }
Eli Friedmanf92f6452012-05-24 21:05:41 +00002390
Eli Friedmanc11535c2012-05-24 00:47:05 +00002391 // If this is a cast to a constructor conversion, check the operand.
Anders Carlsson6aa50392009-11-17 17:11:23 +00002392 // Otherwise, the result of the cast is unused.
Eli Friedmanc11535c2012-05-24 00:47:05 +00002393 if (CE->getCastKind() == CK_ConstructorConversion)
2394 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Eli Friedmanf92f6452012-05-24 21:05:41 +00002395
Eli Friedmanc11535c2012-05-24 00:47:05 +00002396 WarnE = this;
Eli Friedmanf92f6452012-05-24 21:05:41 +00002397 if (const CXXFunctionalCastExpr *CXXCE =
2398 dyn_cast<CXXFunctionalCastExpr>(this)) {
Eli Friedman89fe0d52013-08-15 22:02:56 +00002399 Loc = CXXCE->getLocStart();
Eli Friedmanf92f6452012-05-24 21:05:41 +00002400 R1 = CXXCE->getSubExpr()->getSourceRange();
2401 } else {
2402 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2403 Loc = CStyleCE->getLParenLoc();
2404 R1 = CStyleCE->getSubExpr()->getSourceRange();
2405 }
Chris Lattner237f2752009-02-14 07:37:35 +00002406 return true;
Anders Carlsson6aa50392009-11-17 17:11:23 +00002407 }
Eli Friedmanc11535c2012-05-24 00:47:05 +00002408 case ImplicitCastExprClass: {
2409 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
Eli Friedmanca8da1d2008-05-19 21:24:43 +00002410
Eli Friedmanc11535c2012-05-24 00:47:05 +00002411 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2412 if (ICE->getCastKind() == CK_LValueToRValue &&
2413 ICE->getSubExpr()->getType().isVolatileQualified())
2414 return false;
2415
2416 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2417 }
Chris Lattneraa9c7ae2008-04-08 04:40:51 +00002418 case CXXDefaultArgExprClass:
Mike Stump53f9ded2009-11-03 23:25:48 +00002419 return (cast<CXXDefaultArgExpr>(this)
Eli Friedmanc11535c2012-05-24 00:47:05 +00002420 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
Richard Smith852c9db2013-04-20 22:23:05 +00002421 case CXXDefaultInitExprClass:
2422 return (cast<CXXDefaultInitExpr>(this)
2423 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
Sebastian Redlbd150f42008-11-21 19:14:01 +00002424
2425 case CXXNewExprClass:
2426 // FIXME: In theory, there might be new expressions that don't have side
2427 // effects (e.g. a placement new with an uninitialized POD).
2428 case CXXDeleteExprClass:
Chris Lattner237f2752009-02-14 07:37:35 +00002429 return false;
Richard Smith122f88d2016-12-06 23:52:28 +00002430 case MaterializeTemporaryExprClass:
2431 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2432 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Anders Carlssone80ccac2009-08-16 04:11:06 +00002433 case CXXBindTemporaryExprClass:
Richard Smith122f88d2016-12-06 23:52:28 +00002434 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2435 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
John McCall5d413782010-12-06 08:20:24 +00002436 case ExprWithCleanupsClass:
Richard Smith122f88d2016-12-06 23:52:28 +00002437 return cast<ExprWithCleanups>(this)->getSubExpr()
2438 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
Sebastian Redlbd150f42008-11-21 19:14:01 +00002439 }
Chris Lattner1ec5f562007-06-27 05:38:08 +00002440}
2441
Fariborz Jahanian07735332009-02-22 18:40:18 +00002442/// isOBJCGCCandidate - Check if an expression is objc gc'able.
Fariborz Jahanian063c7722009-09-08 23:38:54 +00002443/// returns true, if it is; false otherwise.
Fariborz Jahanianc6d98002009-06-01 21:29:32 +00002444bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
Peter Collingbourne91147592011-04-15 00:35:48 +00002445 const Expr *E = IgnoreParens();
2446 switch (E->getStmtClass()) {
Fariborz Jahanian07735332009-02-22 18:40:18 +00002447 default:
2448 return false;
2449 case ObjCIvarRefExprClass:
2450 return true;
Fariborz Jahanian392124c2009-02-23 18:59:50 +00002451 case Expr::UnaryOperatorClass:
Peter Collingbourne91147592011-04-15 00:35:48 +00002452 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
Fariborz Jahanian07735332009-02-22 18:40:18 +00002453 case ImplicitCastExprClass:
Peter Collingbourne91147592011-04-15 00:35:48 +00002454 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
Douglas Gregorfe314812011-06-21 17:03:29 +00002455 case MaterializeTemporaryExprClass:
2456 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2457 ->isOBJCGCCandidate(Ctx);
Fariborz Jahaniana16904b2009-05-05 23:28:21 +00002458 case CStyleCastExprClass:
Peter Collingbourne91147592011-04-15 00:35:48 +00002459 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
Douglas Gregor4bd90e52009-10-23 18:54:35 +00002460 case DeclRefExprClass: {
John McCall113bee02012-03-10 09:33:50 +00002461 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
Fangrui Song6907ce22018-07-30 19:24:48 +00002462
Fariborz Jahanianc6d98002009-06-01 21:29:32 +00002463 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2464 if (VD->hasGlobalStorage())
2465 return true;
2466 QualType T = VD->getType();
Fariborz Jahaniancceedbf2009-09-16 18:09:18 +00002467 // dereferencing to a pointer is always a gc'able candidate,
2468 // unless it is __weak.
Daniel Dunbar4782a6e2009-09-17 06:31:17 +00002469 return T->isPointerType() &&
John McCall8ccfcb52009-09-24 19:53:00 +00002470 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
Fariborz Jahanianc6d98002009-06-01 21:29:32 +00002471 }
Fariborz Jahanian07735332009-02-22 18:40:18 +00002472 return false;
2473 }
Douglas Gregorf405d7e2009-08-31 23:41:50 +00002474 case MemberExprClass: {
Peter Collingbourne91147592011-04-15 00:35:48 +00002475 const MemberExpr *M = cast<MemberExpr>(E);
Fariborz Jahanianc6d98002009-06-01 21:29:32 +00002476 return M->getBase()->isOBJCGCCandidate(Ctx);
Fariborz Jahanian07735332009-02-22 18:40:18 +00002477 }
2478 case ArraySubscriptExprClass:
Peter Collingbourne91147592011-04-15 00:35:48 +00002479 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
Fariborz Jahanian07735332009-02-22 18:40:18 +00002480 }
2481}
Sebastian Redlce354af2010-09-10 20:55:33 +00002482
Argyrios Kyrtzidisca766292010-11-01 18:49:26 +00002483bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2484 if (isTypeDependent())
2485 return false;
John McCall086a4642010-11-24 05:12:34 +00002486 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
Argyrios Kyrtzidisca766292010-11-01 18:49:26 +00002487}
2488
John McCall0009fcc2011-04-26 20:42:42 +00002489QualType Expr::findBoundMemberType(const Expr *expr) {
John McCalle314e272011-10-18 21:02:43 +00002490 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
John McCall0009fcc2011-04-26 20:42:42 +00002491
2492 // Bound member expressions are always one of these possibilities:
2493 // x->m x.m x->*y x.*y
2494 // (possibly parenthesized)
2495
2496 expr = expr->IgnoreParens();
2497 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2498 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2499 return mem->getMemberDecl()->getType();
2500 }
2501
2502 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2503 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2504 ->getPointeeType();
2505 assert(type->isFunctionType());
2506 return type;
2507 }
2508
David Majnemerced8bdf2015-02-25 17:36:15 +00002509 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
John McCall0009fcc2011-04-26 20:42:42 +00002510 return QualType();
2511}
2512
Ted Kremenekfff70962008-01-17 16:57:34 +00002513Expr* Expr::IgnoreParens() {
2514 Expr* E = this;
Abramo Bagnara932e3932010-10-15 07:51:18 +00002515 while (true) {
2516 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2517 E = P->getSubExpr();
2518 continue;
2519 }
2520 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2521 if (P->getOpcode() == UO_Extension) {
2522 E = P->getSubExpr();
2523 continue;
2524 }
2525 }
Peter Collingbourne91147592011-04-15 00:35:48 +00002526 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2527 if (!P->isResultDependent()) {
2528 E = P->getResultExpr();
2529 continue;
2530 }
2531 }
Eli Friedman75807f22013-07-20 00:40:58 +00002532 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2533 if (!P->isConditionDependent()) {
2534 E = P->getChosenSubExpr();
2535 continue;
2536 }
2537 }
Abramo Bagnara932e3932010-10-15 07:51:18 +00002538 return E;
2539 }
Ted Kremenekfff70962008-01-17 16:57:34 +00002540}
2541
Chris Lattnerf2660962008-02-13 01:02:39 +00002542/// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2543/// or CastExprs or ImplicitCastExprs, returning their operand.
2544Expr *Expr::IgnoreParenCasts() {
2545 Expr *E = this;
2546 while (true) {
Eli Friedman75807f22013-07-20 00:40:58 +00002547 E = E->IgnoreParens();
Abramo Bagnara932e3932010-10-15 07:51:18 +00002548 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
Chris Lattnerf2660962008-02-13 01:02:39 +00002549 E = P->getSubExpr();
Abramo Bagnara932e3932010-10-15 07:51:18 +00002550 continue;
2551 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002552 if (MaterializeTemporaryExpr *Materialize
Douglas Gregorfe314812011-06-21 17:03:29 +00002553 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2554 E = Materialize->GetTemporaryExpr();
2555 continue;
2556 }
Douglas Gregor6a40b082011-09-08 17:56:33 +00002557 if (SubstNonTypeTemplateParmExpr *NTTP
2558 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2559 E = NTTP->getReplacement();
2560 continue;
Fangrui Song6907ce22018-07-30 19:24:48 +00002561 }
Abramo Bagnara932e3932010-10-15 07:51:18 +00002562 return E;
Chris Lattnerf2660962008-02-13 01:02:39 +00002563 }
2564}
2565
Ted Kremenek6f375e52014-04-16 07:26:09 +00002566Expr *Expr::IgnoreCasts() {
2567 Expr *E = this;
2568 while (true) {
2569 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2570 E = P->getSubExpr();
2571 continue;
2572 }
2573 if (MaterializeTemporaryExpr *Materialize
2574 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2575 E = Materialize->GetTemporaryExpr();
2576 continue;
2577 }
2578 if (SubstNonTypeTemplateParmExpr *NTTP
2579 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2580 E = NTTP->getReplacement();
2581 continue;
2582 }
2583 return E;
2584 }
2585}
2586
John McCall5a4ce8b2010-12-04 08:24:19 +00002587/// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2588/// casts. This is intended purely as a temporary workaround for code
2589/// that hasn't yet been rewritten to do the right thing about those
2590/// casts, and may disappear along with the last internal use.
John McCall34376a62010-12-04 03:47:34 +00002591Expr *Expr::IgnoreParenLValueCasts() {
2592 Expr *E = this;
John McCall5a4ce8b2010-12-04 08:24:19 +00002593 while (true) {
Eli Friedman75807f22013-07-20 00:40:58 +00002594 E = E->IgnoreParens();
2595 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
John McCall34376a62010-12-04 03:47:34 +00002596 if (P->getCastKind() == CK_LValueToRValue) {
2597 E = P->getSubExpr();
2598 continue;
2599 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002600 } else if (MaterializeTemporaryExpr *Materialize
Douglas Gregorfe314812011-06-21 17:03:29 +00002601 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2602 E = Materialize->GetTemporaryExpr();
2603 continue;
Douglas Gregor6a40b082011-09-08 17:56:33 +00002604 } else if (SubstNonTypeTemplateParmExpr *NTTP
2605 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2606 E = NTTP->getReplacement();
2607 continue;
John McCall34376a62010-12-04 03:47:34 +00002608 }
2609 break;
2610 }
2611 return E;
2612}
Rafael Espindolaecbe2e92012-06-28 01:56:38 +00002613
2614Expr *Expr::ignoreParenBaseCasts() {
2615 Expr *E = this;
2616 while (true) {
Eli Friedman75807f22013-07-20 00:40:58 +00002617 E = E->IgnoreParens();
Rafael Espindolaecbe2e92012-06-28 01:56:38 +00002618 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2619 if (CE->getCastKind() == CK_DerivedToBase ||
2620 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2621 CE->getCastKind() == CK_NoOp) {
2622 E = CE->getSubExpr();
2623 continue;
2624 }
2625 }
2626
2627 return E;
2628 }
2629}
2630
John McCalleebc8322010-05-05 22:59:52 +00002631Expr *Expr::IgnoreParenImpCasts() {
2632 Expr *E = this;
2633 while (true) {
Eli Friedman75807f22013-07-20 00:40:58 +00002634 E = E->IgnoreParens();
Abramo Bagnara932e3932010-10-15 07:51:18 +00002635 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
John McCalleebc8322010-05-05 22:59:52 +00002636 E = P->getSubExpr();
Abramo Bagnara932e3932010-10-15 07:51:18 +00002637 continue;
2638 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002639 if (MaterializeTemporaryExpr *Materialize
Douglas Gregorfe314812011-06-21 17:03:29 +00002640 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2641 E = Materialize->GetTemporaryExpr();
2642 continue;
2643 }
Douglas Gregor6a40b082011-09-08 17:56:33 +00002644 if (SubstNonTypeTemplateParmExpr *NTTP
2645 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2646 E = NTTP->getReplacement();
2647 continue;
2648 }
Abramo Bagnara932e3932010-10-15 07:51:18 +00002649 return E;
John McCalleebc8322010-05-05 22:59:52 +00002650 }
2651}
2652
Hans Wennborgde2e67e2011-06-09 17:06:51 +00002653Expr *Expr::IgnoreConversionOperator() {
2654 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
Chandler Carruth4352b0b2011-06-21 17:22:09 +00002655 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
Hans Wennborgde2e67e2011-06-09 17:06:51 +00002656 return MCE->getImplicitObjectArgument();
2657 }
2658 return this;
2659}
2660
Chris Lattneref26c772009-03-13 17:28:01 +00002661/// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2662/// value (including ptr->int casts of the same size). Strip off any
2663/// ParenExpr or CastExprs, returning their operand.
2664Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2665 Expr *E = this;
2666 while (true) {
Eli Friedman75807f22013-07-20 00:40:58 +00002667 E = E->IgnoreParens();
Mike Stump11289f42009-09-09 15:08:12 +00002668
Chris Lattneref26c772009-03-13 17:28:01 +00002669 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2670 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
Douglas Gregorb90df602010-06-16 00:17:44 +00002671 // ptr<->int casts of the same width. We also ignore all identity casts.
Chris Lattneref26c772009-03-13 17:28:01 +00002672 Expr *SE = P->getSubExpr();
Mike Stump11289f42009-09-09 15:08:12 +00002673
Chris Lattneref26c772009-03-13 17:28:01 +00002674 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2675 E = SE;
2676 continue;
2677 }
Mike Stump11289f42009-09-09 15:08:12 +00002678
Abramo Bagnara932e3932010-10-15 07:51:18 +00002679 if ((E->getType()->isPointerType() ||
Douglas Gregor6972a622010-06-16 00:35:25 +00002680 E->getType()->isIntegralType(Ctx)) &&
Abramo Bagnara932e3932010-10-15 07:51:18 +00002681 (SE->getType()->isPointerType() ||
Douglas Gregor6972a622010-06-16 00:35:25 +00002682 SE->getType()->isIntegralType(Ctx)) &&
Chris Lattneref26c772009-03-13 17:28:01 +00002683 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2684 E = SE;
2685 continue;
2686 }
2687 }
Mike Stump11289f42009-09-09 15:08:12 +00002688
Douglas Gregor6a40b082011-09-08 17:56:33 +00002689 if (SubstNonTypeTemplateParmExpr *NTTP
2690 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2691 E = NTTP->getReplacement();
2692 continue;
2693 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002694
Chris Lattneref26c772009-03-13 17:28:01 +00002695 return E;
2696 }
2697}
2698
Douglas Gregord196a582009-12-14 19:27:10 +00002699bool Expr::isDefaultArgument() const {
2700 const Expr *E = this;
Douglas Gregorfe314812011-06-21 17:03:29 +00002701 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2702 E = M->GetTemporaryExpr();
2703
Douglas Gregord196a582009-12-14 19:27:10 +00002704 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2705 E = ICE->getSubExprAsWritten();
Fangrui Song6907ce22018-07-30 19:24:48 +00002706
Douglas Gregord196a582009-12-14 19:27:10 +00002707 return isa<CXXDefaultArgExpr>(E);
2708}
Chris Lattneref26c772009-03-13 17:28:01 +00002709
Adrian Prantl9fc8faf2018-05-09 01:00:01 +00002710/// Skip over any no-op casts and any temporary-binding
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002711/// expressions.
Anders Carlsson66bbf502010-11-28 16:40:49 +00002712static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
Douglas Gregorfe314812011-06-21 17:03:29 +00002713 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2714 E = M->GetTemporaryExpr();
2715
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002716 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
John McCalle3027922010-08-25 11:45:40 +00002717 if (ICE->getCastKind() == CK_NoOp)
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002718 E = ICE->getSubExpr();
2719 else
2720 break;
2721 }
2722
2723 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2724 E = BE->getSubExpr();
2725
2726 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
John McCalle3027922010-08-25 11:45:40 +00002727 if (ICE->getCastKind() == CK_NoOp)
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002728 E = ICE->getSubExpr();
2729 else
2730 break;
2731 }
Anders Carlsson66bbf502010-11-28 16:40:49 +00002732
2733 return E->IgnoreParens();
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002734}
2735
John McCall7a626f62010-09-15 10:14:12 +00002736/// isTemporaryObject - Determines if this expression produces a
2737/// temporary of the given class type.
2738bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2739 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2740 return false;
2741
Anders Carlsson66bbf502010-11-28 16:40:49 +00002742 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002743
John McCall02dc8c72010-09-15 20:59:13 +00002744 // Temporaries are by definition pr-values of class type.
Fariborz Jahanian30e8d582010-09-27 17:30:38 +00002745 if (!E->Classify(C).isPRValue()) {
2746 // In this context, property reference is a message call and is pr-value.
John McCallb7bd14f2010-12-02 01:19:52 +00002747 if (!isa<ObjCPropertyRefExpr>(E))
Fariborz Jahanian30e8d582010-09-27 17:30:38 +00002748 return false;
2749 }
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002750
John McCallf4ee1dd2010-09-16 06:57:56 +00002751 // Black-list a few cases which yield pr-values of class type that don't
2752 // refer to temporaries of that type:
2753
2754 // - implicit derived-to-base conversions
John McCall7a626f62010-09-15 10:14:12 +00002755 if (isa<ImplicitCastExpr>(E)) {
2756 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2757 case CK_DerivedToBase:
2758 case CK_UncheckedDerivedToBase:
2759 return false;
2760 default:
2761 break;
2762 }
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002763 }
2764
John McCallf4ee1dd2010-09-16 06:57:56 +00002765 // - member expressions (all)
2766 if (isa<MemberExpr>(E))
2767 return false;
2768
Eli Friedman13ffdd82012-06-15 23:51:06 +00002769 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2770 if (BO->isPtrMemOp())
2771 return false;
2772
John McCallc07a0c72011-02-17 10:25:35 +00002773 // - opaque values (all)
2774 if (isa<OpaqueValueExpr>(E))
2775 return false;
2776
John McCall7a626f62010-09-15 10:14:12 +00002777 return true;
Douglas Gregor45cf7e32010-04-02 18:24:57 +00002778}
2779
Douglas Gregor25b7e052011-03-02 21:06:53 +00002780bool Expr::isImplicitCXXThis() const {
2781 const Expr *E = this;
Fangrui Song6907ce22018-07-30 19:24:48 +00002782
Douglas Gregor25b7e052011-03-02 21:06:53 +00002783 // Strip away parentheses and casts we don't care about.
2784 while (true) {
2785 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2786 E = Paren->getSubExpr();
2787 continue;
2788 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002789
Douglas Gregor25b7e052011-03-02 21:06:53 +00002790 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2791 if (ICE->getCastKind() == CK_NoOp ||
2792 ICE->getCastKind() == CK_LValueToRValue ||
Fangrui Song6907ce22018-07-30 19:24:48 +00002793 ICE->getCastKind() == CK_DerivedToBase ||
Douglas Gregor25b7e052011-03-02 21:06:53 +00002794 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2795 E = ICE->getSubExpr();
2796 continue;
2797 }
2798 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002799
Douglas Gregor25b7e052011-03-02 21:06:53 +00002800 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2801 if (UnOp->getOpcode() == UO_Extension) {
2802 E = UnOp->getSubExpr();
2803 continue;
2804 }
2805 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002806
Douglas Gregorfe314812011-06-21 17:03:29 +00002807 if (const MaterializeTemporaryExpr *M
2808 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2809 E = M->GetTemporaryExpr();
2810 continue;
2811 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002812
Douglas Gregor25b7e052011-03-02 21:06:53 +00002813 break;
2814 }
Fangrui Song6907ce22018-07-30 19:24:48 +00002815
Douglas Gregor25b7e052011-03-02 21:06:53 +00002816 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2817 return This->isImplicit();
Fangrui Song6907ce22018-07-30 19:24:48 +00002818
Douglas Gregor25b7e052011-03-02 21:06:53 +00002819 return false;
2820}
2821
Douglas Gregor4619e432008-12-05 23:32:09 +00002822/// hasAnyTypeDependentArguments - Determines if any of the expressions
2823/// in Exprs is type-dependent.
Dmitri Gribenkof8579502013-01-12 19:30:44 +00002824bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
Ahmed Charlesb24b9aa2012-02-25 11:00:22 +00002825 for (unsigned I = 0; I < Exprs.size(); ++I)
Douglas Gregor4619e432008-12-05 23:32:09 +00002826 if (Exprs[I]->isTypeDependent())
2827 return true;
2828
2829 return false;
2830}
2831
Abramo Bagnara847c6602014-05-22 19:20:46 +00002832bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2833 const Expr **Culprit) const {
Eli Friedman384da272009-01-25 03:12:18 +00002834 // This function is attempting whether an expression is an initializer
Eli Friedman4c27ac22013-07-16 22:40:53 +00002835 // which can be evaluated at compile-time. It very closely parallels
2836 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2837 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2838 // to isEvaluatable most of the time.
2839 //
John McCall8b0f4ff2010-08-02 21:13:48 +00002840 // If we ever capture reference-binding directly in the AST, we can
2841 // kill the second parameter.
2842
2843 if (IsForRef) {
2844 EvalResult Result;
Abramo Bagnara847c6602014-05-22 19:20:46 +00002845 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2846 return true;
2847 if (Culprit)
2848 *Culprit = this;
2849 return false;
John McCall8b0f4ff2010-08-02 21:13:48 +00002850 }
Eli Friedmancf7cbe72009-02-20 02:36:22 +00002851
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002852 switch (getStmtClass()) {
Eli Friedman384da272009-01-25 03:12:18 +00002853 default: break;
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002854 case StringLiteralClass:
Chris Lattnerd7e7b8e2009-02-24 22:18:39 +00002855 case ObjCEncodeExprClass:
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002856 return true;
John McCall81c9cea2010-08-01 21:51:45 +00002857 case CXXTemporaryObjectExprClass:
2858 case CXXConstructExprClass: {
2859 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
John McCall8b0f4ff2010-08-02 21:13:48 +00002860
Eli Friedman4c27ac22013-07-16 22:40:53 +00002861 if (CE->getConstructor()->isTrivial() &&
2862 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2863 // Trivial default constructor
Richard Smithd62306a2011-11-10 06:34:14 +00002864 if (!CE->getNumArgs()) return true;
John McCall8b0f4ff2010-08-02 21:13:48 +00002865
Eli Friedman4c27ac22013-07-16 22:40:53 +00002866 // Trivial copy constructor
2867 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
Abramo Bagnara847c6602014-05-22 19:20:46 +00002868 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
Richard Smithd62306a2011-11-10 06:34:14 +00002869 }
2870
Richard Smithd62306a2011-11-10 06:34:14 +00002871 break;
John McCall81c9cea2010-08-01 21:51:45 +00002872 }
Nate Begeman2f2bdeb2009-01-18 03:20:47 +00002873 case CompoundLiteralExprClass: {
Eli Friedmancf7cbe72009-02-20 02:36:22 +00002874 // This handles gcc's extension that allows global initializers like
2875 // "struct x {int x;} x = (struct x) {};".
2876 // FIXME: This accepts other cases it shouldn't!
Nate Begeman2f2bdeb2009-01-18 03:20:47 +00002877 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
Abramo Bagnara847c6602014-05-22 19:20:46 +00002878 return Exp->isConstantInitializer(Ctx, false, Culprit);
Nate Begeman2f2bdeb2009-01-18 03:20:47 +00002879 }
Yunzhong Gaocb779302015-06-10 00:27:52 +00002880 case DesignatedInitUpdateExprClass: {
2881 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2882 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2883 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2884 }
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002885 case InitListExprClass: {
Eli Friedman4c27ac22013-07-16 22:40:53 +00002886 const InitListExpr *ILE = cast<InitListExpr>(this);
2887 if (ILE->getType()->isArrayType()) {
2888 unsigned numInits = ILE->getNumInits();
2889 for (unsigned i = 0; i < numInits; i++) {
Abramo Bagnara847c6602014-05-22 19:20:46 +00002890 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
Eli Friedman4c27ac22013-07-16 22:40:53 +00002891 return false;
2892 }
2893 return true;
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002894 }
Eli Friedman4c27ac22013-07-16 22:40:53 +00002895
2896 if (ILE->getType()->isRecordType()) {
2897 unsigned ElementNo = 0;
2898 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
Hans Wennborga302cd92014-08-21 16:06:57 +00002899 for (const auto *Field : RD->fields()) {
Eli Friedman4c27ac22013-07-16 22:40:53 +00002900 // If this is a union, skip all the fields that aren't being initialized.
Hans Wennborga302cd92014-08-21 16:06:57 +00002901 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
Eli Friedman4c27ac22013-07-16 22:40:53 +00002902 continue;
2903
2904 // Don't emit anonymous bitfields, they just affect layout.
2905 if (Field->isUnnamedBitfield())
2906 continue;
2907
2908 if (ElementNo < ILE->getNumInits()) {
2909 const Expr *Elt = ILE->getInit(ElementNo++);
2910 if (Field->isBitField()) {
2911 // Bitfields have to evaluate to an integer.
2912 llvm::APSInt ResultTmp;
Abramo Bagnara847c6602014-05-22 19:20:46 +00002913 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2914 if (Culprit)
2915 *Culprit = Elt;
Eli Friedman4c27ac22013-07-16 22:40:53 +00002916 return false;
Abramo Bagnara847c6602014-05-22 19:20:46 +00002917 }
Eli Friedman4c27ac22013-07-16 22:40:53 +00002918 } else {
2919 bool RefType = Field->getType()->isReferenceType();
Abramo Bagnara847c6602014-05-22 19:20:46 +00002920 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
Eli Friedman4c27ac22013-07-16 22:40:53 +00002921 return false;
2922 }
2923 }
2924 }
2925 return true;
2926 }
2927
2928 break;
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002929 }
Douglas Gregor0202cb42009-01-29 17:44:32 +00002930 case ImplicitValueInitExprClass:
Yunzhong Gaocb779302015-06-10 00:27:52 +00002931 case NoInitExprClass:
Douglas Gregor0202cb42009-01-29 17:44:32 +00002932 return true;
Chris Lattner3eb172a2009-10-13 07:14:16 +00002933 case ParenExprClass:
John McCall8b0f4ff2010-08-02 21:13:48 +00002934 return cast<ParenExpr>(this)->getSubExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002935 ->isConstantInitializer(Ctx, IsForRef, Culprit);
Peter Collingbourne91147592011-04-15 00:35:48 +00002936 case GenericSelectionExprClass:
Peter Collingbourne91147592011-04-15 00:35:48 +00002937 return cast<GenericSelectionExpr>(this)->getResultExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002938 ->isConstantInitializer(Ctx, IsForRef, Culprit);
Abramo Bagnarab59a5b62010-09-27 07:13:32 +00002939 case ChooseExprClass:
Abramo Bagnara847c6602014-05-22 19:20:46 +00002940 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2941 if (Culprit)
2942 *Culprit = this;
Eli Friedman75807f22013-07-20 00:40:58 +00002943 return false;
Abramo Bagnara847c6602014-05-22 19:20:46 +00002944 }
Eli Friedman75807f22013-07-20 00:40:58 +00002945 return cast<ChooseExpr>(this)->getChosenSubExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002946 ->isConstantInitializer(Ctx, IsForRef, Culprit);
Eli Friedman384da272009-01-25 03:12:18 +00002947 case UnaryOperatorClass: {
2948 const UnaryOperator* Exp = cast<UnaryOperator>(this);
John McCalle3027922010-08-25 11:45:40 +00002949 if (Exp->getOpcode() == UO_Extension)
Abramo Bagnara847c6602014-05-22 19:20:46 +00002950 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
Eli Friedman384da272009-01-25 03:12:18 +00002951 break;
2952 }
John McCall8b0f4ff2010-08-02 21:13:48 +00002953 case CXXFunctionalCastExprClass:
John McCall81c9cea2010-08-01 21:51:45 +00002954 case CXXStaticCastExprClass:
Chris Lattner1f02e052009-04-21 05:19:11 +00002955 case ImplicitCastExprClass:
Eli Friedman4c27ac22013-07-16 22:40:53 +00002956 case CStyleCastExprClass:
2957 case ObjCBridgedCastExprClass:
2958 case CXXDynamicCastExprClass:
2959 case CXXReinterpretCastExprClass:
2960 case CXXConstCastExprClass: {
Richard Smith161f09a2011-12-06 22:44:34 +00002961 const CastExpr *CE = cast<CastExpr>(this);
2962
Eli Friedman13ec75b2011-12-21 00:43:02 +00002963 // Handle misc casts we want to ignore.
Eli Friedman13ec75b2011-12-21 00:43:02 +00002964 if (CE->getCastKind() == CK_NoOp ||
2965 CE->getCastKind() == CK_LValueToRValue ||
2966 CE->getCastKind() == CK_ToUnion ||
Eli Friedman4c27ac22013-07-16 22:40:53 +00002967 CE->getCastKind() == CK_ConstructorConversion ||
2968 CE->getCastKind() == CK_NonAtomicToAtomic ||
Yaxun Liu0bc4b2d2016-07-28 19:26:30 +00002969 CE->getCastKind() == CK_AtomicToNonAtomic ||
2970 CE->getCastKind() == CK_IntToOCLSampler)
Abramo Bagnara847c6602014-05-22 19:20:46 +00002971 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
Richard Smith161f09a2011-12-06 22:44:34 +00002972
Eli Friedman384da272009-01-25 03:12:18 +00002973 break;
Richard Smith161f09a2011-12-06 22:44:34 +00002974 }
Douglas Gregorfe314812011-06-21 17:03:29 +00002975 case MaterializeTemporaryExprClass:
Chris Lattner0e62c1c2011-07-23 10:55:15 +00002976 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002977 ->isConstantInitializer(Ctx, false, Culprit);
Eugene Zelenkoae304b02017-11-17 18:09:48 +00002978
Eli Friedman4c27ac22013-07-16 22:40:53 +00002979 case SubstNonTypeTemplateParmExprClass:
2980 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002981 ->isConstantInitializer(Ctx, false, Culprit);
Eli Friedman4c27ac22013-07-16 22:40:53 +00002982 case CXXDefaultArgExprClass:
2983 return cast<CXXDefaultArgExpr>(this)->getExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002984 ->isConstantInitializer(Ctx, false, Culprit);
Eli Friedman4c27ac22013-07-16 22:40:53 +00002985 case CXXDefaultInitExprClass:
2986 return cast<CXXDefaultInitExpr>(this)->getExpr()
Abramo Bagnara847c6602014-05-22 19:20:46 +00002987 ->isConstantInitializer(Ctx, false, Culprit);
Anders Carlssona7c5eb72008-11-24 05:23:59 +00002988 }
Richard Smithce8eca52015-12-08 03:21:47 +00002989 // Allow certain forms of UB in constant initializers: signed integer
2990 // overflow and floating-point division by zero. We'll give a warning on
2991 // these, but they're common enough that we have to accept them.
2992 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
Abramo Bagnara847c6602014-05-22 19:20:46 +00002993 return true;
2994 if (Culprit)
2995 *Culprit = this;
2996 return false;
Steve Naroffb03f5942007-09-02 20:30:18 +00002997}
2998
Nico Weber758fbac2018-02-13 21:31:47 +00002999bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
3000 const FunctionDecl* FD = getDirectCallee();
3001 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
3002 FD->getBuiltinID() != Builtin::BI__builtin_assume))
3003 return false;
Fangrui Song6907ce22018-07-30 19:24:48 +00003004
Nico Weber758fbac2018-02-13 21:31:47 +00003005 const Expr* Arg = getArg(0);
3006 bool ArgVal;
3007 return !Arg->isValueDependent() &&
3008 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3009}
3010
Scott Douglasscc013592015-06-10 15:18:23 +00003011namespace {
Adrian Prantl9fc8faf2018-05-09 01:00:01 +00003012 /// Look for any side effects within a Stmt.
Scott Douglasscc013592015-06-10 15:18:23 +00003013 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003014 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
Scott Douglasscc013592015-06-10 15:18:23 +00003015 const bool IncludePossibleEffects;
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003016 bool HasSideEffects;
Scott Douglasscc013592015-06-10 15:18:23 +00003017
3018 public:
3019 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003020 : Inherited(Context),
3021 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
Scott Douglasscc013592015-06-10 15:18:23 +00003022
3023 bool hasSideEffects() const { return HasSideEffects; }
3024
3025 void VisitExpr(const Expr *E) {
3026 if (!HasSideEffects &&
3027 E->HasSideEffects(Context, IncludePossibleEffects))
3028 HasSideEffects = true;
3029 }
3030 };
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003031}
Scott Douglasscc013592015-06-10 15:18:23 +00003032
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003033bool Expr::HasSideEffects(const ASTContext &Ctx,
3034 bool IncludePossibleEffects) const {
3035 // In circumstances where we care about definite side effects instead of
3036 // potential side effects, we want to ignore expressions that are part of a
3037 // macro expansion as a potential side effect.
3038 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3039 return false;
3040
Richard Smith0421ce72012-08-07 04:16:51 +00003041 if (isInstantiationDependent())
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003042 return IncludePossibleEffects;
Richard Smith0421ce72012-08-07 04:16:51 +00003043
3044 switch (getStmtClass()) {
3045 case NoStmtClass:
3046 #define ABSTRACT_STMT(Type)
3047 #define STMT(Type, Base) case Type##Class:
3048 #define EXPR(Type, Base)
3049 #include "clang/AST/StmtNodes.inc"
3050 llvm_unreachable("unexpected Expr kind");
3051
3052 case DependentScopeDeclRefExprClass:
3053 case CXXUnresolvedConstructExprClass:
3054 case CXXDependentScopeMemberExprClass:
3055 case UnresolvedLookupExprClass:
3056 case UnresolvedMemberExprClass:
3057 case PackExpansionExprClass:
3058 case SubstNonTypeTemplateParmPackExprClass:
Richard Smithb15fe3a2012-09-12 00:56:43 +00003059 case FunctionParmPackExprClass:
Kaelyn Takatae1f49d52014-10-27 18:07:20 +00003060 case TypoExprClass:
Richard Smith0f0af192014-11-08 05:07:16 +00003061 case CXXFoldExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003062 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
3063
Richard Smitha33e4fe2012-08-07 05:18:29 +00003064 case DeclRefExprClass:
3065 case ObjCIvarRefExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003066 case PredefinedExprClass:
3067 case IntegerLiteralClass:
Leonard Chandb01c3a2018-06-20 17:19:40 +00003068 case FixedPointLiteralClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003069 case FloatingLiteralClass:
3070 case ImaginaryLiteralClass:
3071 case StringLiteralClass:
3072 case CharacterLiteralClass:
3073 case OffsetOfExprClass:
3074 case ImplicitValueInitExprClass:
3075 case UnaryExprOrTypeTraitExprClass:
3076 case AddrLabelExprClass:
3077 case GNUNullExprClass:
Richard Smith410306b2016-12-12 02:53:20 +00003078 case ArrayInitIndexExprClass:
Yunzhong Gaocb779302015-06-10 00:27:52 +00003079 case NoInitExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003080 case CXXBoolLiteralExprClass:
3081 case CXXNullPtrLiteralExprClass:
3082 case CXXThisExprClass:
3083 case CXXScalarValueInitExprClass:
3084 case TypeTraitExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003085 case ArrayTypeTraitExprClass:
3086 case ExpressionTraitExprClass:
3087 case CXXNoexceptExprClass:
3088 case SizeOfPackExprClass:
3089 case ObjCStringLiteralClass:
3090 case ObjCEncodeExprClass:
3091 case ObjCBoolLiteralExprClass:
Erik Pilkington29099de2016-07-16 00:35:23 +00003092 case ObjCAvailabilityCheckExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003093 case CXXUuidofExprClass:
3094 case OpaqueValueExprClass:
3095 // These never have a side-effect.
3096 return false;
3097
3098 case CallExprClass:
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003099 case CXXOperatorCallExprClass:
3100 case CXXMemberCallExprClass:
3101 case CUDAKernelCallExprClass:
Michael Kupersteinaed5ccd2015-04-06 13:22:01 +00003102 case UserDefinedLiteralClass: {
3103 // We don't know a call definitely has side effects, except for calls
3104 // to pure/const functions that definitely don't.
3105 // If the call itself is considered side-effect free, check the operands.
3106 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3107 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3108 if (IsPure || !IncludePossibleEffects)
3109 break;
3110 return true;
3111 }
3112
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003113 case BlockExprClass:
3114 case CXXBindTemporaryExprClass:
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003115 if (!IncludePossibleEffects)
3116 break;
3117 return true;
3118
John McCall5e77d762013-04-16 07:28:30 +00003119 case MSPropertyRefExprClass:
Alexey Bataevf7630272015-11-25 12:01:00 +00003120 case MSPropertySubscriptExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003121 case CompoundAssignOperatorClass:
3122 case VAArgExprClass:
3123 case AtomicExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003124 case CXXThrowExprClass:
3125 case CXXNewExprClass:
3126 case CXXDeleteExprClass:
Richard Smith9f690bd2015-10-27 06:02:45 +00003127 case CoawaitExprClass:
Eric Fiselier20f25cb2017-03-06 23:38:15 +00003128 case DependentCoawaitExprClass:
Richard Smith9f690bd2015-10-27 06:02:45 +00003129 case CoyieldExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003130 // These always have a side-effect.
3131 return true;
3132
Scott Douglasscc013592015-06-10 15:18:23 +00003133 case StmtExprClass: {
3134 // StmtExprs have a side-effect if any substatement does.
3135 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3136 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3137 return Finder.hasSideEffects();
3138 }
3139
Tim Shen4a05bb82016-06-21 20:29:17 +00003140 case ExprWithCleanupsClass:
3141 if (IncludePossibleEffects)
3142 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3143 return true;
3144 break;
3145
Richard Smith0421ce72012-08-07 04:16:51 +00003146 case ParenExprClass:
3147 case ArraySubscriptExprClass:
Alexey Bataev1a3320e2015-08-25 14:24:04 +00003148 case OMPArraySectionExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003149 case MemberExprClass:
3150 case ConditionalOperatorClass:
3151 case BinaryConditionalOperatorClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003152 case CompoundLiteralExprClass:
3153 case ExtVectorElementExprClass:
3154 case DesignatedInitExprClass:
Yunzhong Gaocb779302015-06-10 00:27:52 +00003155 case DesignatedInitUpdateExprClass:
Richard Smith410306b2016-12-12 02:53:20 +00003156 case ArrayInitLoopExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003157 case ParenListExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003158 case CXXPseudoDestructorExprClass:
Richard Smithcc1b96d2013-06-12 22:31:48 +00003159 case CXXStdInitializerListExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003160 case SubstNonTypeTemplateParmExprClass:
3161 case MaterializeTemporaryExprClass:
3162 case ShuffleVectorExprClass:
Hal Finkelc4d7c822013-09-18 03:29:45 +00003163 case ConvertVectorExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003164 case AsTypeExprClass:
3165 // These have a side-effect if any subexpression does.
3166 break;
3167
Richard Smitha33e4fe2012-08-07 05:18:29 +00003168 case UnaryOperatorClass:
3169 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
Richard Smith0421ce72012-08-07 04:16:51 +00003170 return true;
3171 break;
Richard Smith0421ce72012-08-07 04:16:51 +00003172
3173 case BinaryOperatorClass:
3174 if (cast<BinaryOperator>(this)->isAssignmentOp())
3175 return true;
3176 break;
3177
Richard Smith0421ce72012-08-07 04:16:51 +00003178 case InitListExprClass:
3179 // FIXME: The children for an InitListExpr doesn't include the array filler.
3180 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003181 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
Richard Smith0421ce72012-08-07 04:16:51 +00003182 return true;
3183 break;
3184
3185 case GenericSelectionExprClass:
3186 return cast<GenericSelectionExpr>(this)->getResultExpr()->
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003187 HasSideEffects(Ctx, IncludePossibleEffects);
Richard Smith0421ce72012-08-07 04:16:51 +00003188
3189 case ChooseExprClass:
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003190 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3191 Ctx, IncludePossibleEffects);
Richard Smith0421ce72012-08-07 04:16:51 +00003192
3193 case CXXDefaultArgExprClass:
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003194 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3195 Ctx, IncludePossibleEffects);
Richard Smith0421ce72012-08-07 04:16:51 +00003196
Reid Klecknerd60b82f2014-11-17 23:36:45 +00003197 case CXXDefaultInitExprClass: {
3198 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3199 if (const Expr *E = FD->getInClassInitializer())
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003200 return E->HasSideEffects(Ctx, IncludePossibleEffects);
Richard Smith852c9db2013-04-20 22:23:05 +00003201 // If we've not yet parsed the initializer, assume it has side-effects.
3202 return true;
Reid Klecknerd60b82f2014-11-17 23:36:45 +00003203 }
Richard Smith852c9db2013-04-20 22:23:05 +00003204
Richard Smith0421ce72012-08-07 04:16:51 +00003205 case CXXDynamicCastExprClass: {
3206 // A dynamic_cast expression has side-effects if it can throw.
3207 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3208 if (DCE->getTypeAsWritten()->isReferenceType() &&
3209 DCE->getCastKind() == CK_Dynamic)
3210 return true;
Adrian Prantlf3b3ccd2017-12-19 22:06:11 +00003211 }
3212 LLVM_FALLTHROUGH;
Richard Smitha33e4fe2012-08-07 05:18:29 +00003213 case ImplicitCastExprClass:
3214 case CStyleCastExprClass:
3215 case CXXStaticCastExprClass:
3216 case CXXReinterpretCastExprClass:
3217 case CXXConstCastExprClass:
3218 case CXXFunctionalCastExprClass: {
Aaron Ballman409af502015-01-03 17:00:12 +00003219 // While volatile reads are side-effecting in both C and C++, we treat them
3220 // as having possible (not definite) side-effects. This allows idiomatic
3221 // code to behave without warning, such as sizeof(*v) for a volatile-
3222 // qualified pointer.
3223 if (!IncludePossibleEffects)
3224 break;
3225
Richard Smitha33e4fe2012-08-07 05:18:29 +00003226 const CastExpr *CE = cast<CastExpr>(this);
3227 if (CE->getCastKind() == CK_LValueToRValue &&
3228 CE->getSubExpr()->getType().isVolatileQualified())
3229 return true;
Richard Smith0421ce72012-08-07 04:16:51 +00003230 break;
3231 }
3232
Richard Smithef8bf432012-08-13 20:08:14 +00003233 case CXXTypeidExprClass:
3234 // typeid might throw if its subexpression is potentially-evaluated, so has
3235 // side-effects in that case whether or not its subexpression does.
3236 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
Richard Smith0421ce72012-08-07 04:16:51 +00003237
3238 case CXXConstructExprClass:
3239 case CXXTemporaryObjectExprClass: {
3240 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003241 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
Richard Smith0421ce72012-08-07 04:16:51 +00003242 return true;
Richard Smitha33e4fe2012-08-07 05:18:29 +00003243 // A trivial constructor does not add any side-effects of its own. Just look
3244 // at its arguments.
Richard Smith0421ce72012-08-07 04:16:51 +00003245 break;
3246 }
3247
Richard Smith5179eb72016-06-28 19:03:57 +00003248 case CXXInheritedCtorInitExprClass: {
3249 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3250 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3251 return true;
3252 break;
3253 }
3254
Richard Smith0421ce72012-08-07 04:16:51 +00003255 case LambdaExprClass: {
3256 const LambdaExpr *LE = cast<LambdaExpr>(this);
3257 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3258 E = LE->capture_end(); I != E; ++I)
3259 if (I->getCaptureKind() == LCK_ByCopy)
3260 // FIXME: Only has a side-effect if the variable is volatile or if
3261 // the copy would invoke a non-trivial copy constructor.
3262 return true;
3263 return false;
3264 }
3265
3266 case PseudoObjectExprClass: {
3267 // Only look for side-effects in the semantic form, and look past
3268 // OpaqueValueExpr bindings in that form.
3269 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3270 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3271 E = PO->semantics_end();
3272 I != E; ++I) {
3273 const Expr *Subexpr = *I;
3274 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3275 Subexpr = OVE->getSourceExpr();
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003276 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
Richard Smith0421ce72012-08-07 04:16:51 +00003277 return true;
3278 }
3279 return false;
3280 }
3281
3282 case ObjCBoxedExprClass:
3283 case ObjCArrayLiteralClass:
3284 case ObjCDictionaryLiteralClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003285 case ObjCSelectorExprClass:
3286 case ObjCProtocolExprClass:
Richard Smith0421ce72012-08-07 04:16:51 +00003287 case ObjCIsaExprClass:
3288 case ObjCIndirectCopyRestoreExprClass:
3289 case ObjCSubscriptRefExprClass:
3290 case ObjCBridgedCastExprClass:
Aaron Ballman6c93b3e2014-12-17 21:57:17 +00003291 case ObjCMessageExprClass:
3292 case ObjCPropertyRefExprClass:
3293 // FIXME: Classify these cases better.
3294 if (IncludePossibleEffects)
3295 return true;
3296 break;
Richard Smith0421ce72012-08-07 04:16:51 +00003297 }
3298
3299 // Recurse to children.
Benjamin Kramer642f1732015-07-02 21:03:14 +00003300 for (const Stmt *SubStmt : children())
3301 if (SubStmt &&
3302 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3303 return true;
Richard Smith0421ce72012-08-07 04:16:51 +00003304
3305 return false;
3306}
3307
Douglas Gregor1be329d2012-02-23 07:33:15 +00003308namespace {
Adrian Prantl9fc8faf2018-05-09 01:00:01 +00003309 /// Look for a call to a non-trivial function within an expression.
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003310 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3311 {
3312 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
Eugene Zelenko11a7ef82017-11-15 22:00:04 +00003313
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003314 bool NonTrivial;
Fangrui Song6907ce22018-07-30 19:24:48 +00003315
Douglas Gregor1be329d2012-02-23 07:33:15 +00003316 public:
Scott Douglass503fc392015-06-10 13:53:15 +00003317 explicit NonTrivialCallFinder(const ASTContext &Context)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003318 : Inherited(Context), NonTrivial(false) { }
Fangrui Song6907ce22018-07-30 19:24:48 +00003319
Douglas Gregor1be329d2012-02-23 07:33:15 +00003320 bool hasNonTrivialCall() const { return NonTrivial; }
Scott Douglass503fc392015-06-10 13:53:15 +00003321
3322 void VisitCallExpr(const CallExpr *E) {
3323 if (const CXXMethodDecl *Method
3324 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
Douglas Gregor1be329d2012-02-23 07:33:15 +00003325 if (Method->isTrivial()) {
3326 // Recurse to children of the call.
3327 Inherited::VisitStmt(E);
3328 return;
3329 }
3330 }
Fangrui Song6907ce22018-07-30 19:24:48 +00003331
Douglas Gregor1be329d2012-02-23 07:33:15 +00003332 NonTrivial = true;
3333 }
Scott Douglass503fc392015-06-10 13:53:15 +00003334
3335 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
Douglas Gregor1be329d2012-02-23 07:33:15 +00003336 if (E->getConstructor()->isTrivial()) {
3337 // Recurse to children of the call.
3338 Inherited::VisitStmt(E);
3339 return;
3340 }
Fangrui Song6907ce22018-07-30 19:24:48 +00003341
Douglas Gregor1be329d2012-02-23 07:33:15 +00003342 NonTrivial = true;
3343 }
Scott Douglass503fc392015-06-10 13:53:15 +00003344
3345 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
Douglas Gregor1be329d2012-02-23 07:33:15 +00003346 if (E->getTemporary()->getDestructor()->isTrivial()) {
3347 Inherited::VisitStmt(E);
3348 return;
3349 }
Fangrui Song6907ce22018-07-30 19:24:48 +00003350
Douglas Gregor1be329d2012-02-23 07:33:15 +00003351 NonTrivial = true;
3352 }
3353 };
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003354}
Douglas Gregor1be329d2012-02-23 07:33:15 +00003355
Scott Douglass503fc392015-06-10 13:53:15 +00003356bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
Douglas Gregor1be329d2012-02-23 07:33:15 +00003357 NonTrivialCallFinder Finder(Ctx);
3358 Finder.Visit(this);
Fangrui Song6907ce22018-07-30 19:24:48 +00003359 return Finder.hasNonTrivialCall();
Douglas Gregor1be329d2012-02-23 07:33:15 +00003360}
3361
Fangrui Song6907ce22018-07-30 19:24:48 +00003362/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003363/// pointer constant or not, as well as the specific kind of constant detected.
3364/// Null pointer constants can be integer constant expressions with the
3365/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3366/// (a GNU extension).
3367Expr::NullPointerConstantKind
3368Expr::isNullPointerConstant(ASTContext &Ctx,
3369 NullPointerConstantValueDependence NPC) const {
Reid Klecknera5eef142013-11-12 02:22:34 +00003370 if (isValueDependent() &&
Alp Tokerbfa39342014-01-14 12:51:41 +00003371 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
Douglas Gregor56751b52009-09-25 04:25:58 +00003372 switch (NPC) {
3373 case NPC_NeverValueDependent:
David Blaikie83d382b2011-09-23 05:06:16 +00003374 llvm_unreachable("Unexpected value dependent expression!");
Douglas Gregor56751b52009-09-25 04:25:58 +00003375 case NPC_ValueDependentIsNull:
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003376 if (isTypeDependent() || getType()->isIntegralType(Ctx))
David Blaikie1c7c8f72012-08-08 17:33:31 +00003377 return NPCK_ZeroExpression;
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003378 else
3379 return NPCK_NotNull;
Fangrui Song6907ce22018-07-30 19:24:48 +00003380
Douglas Gregor56751b52009-09-25 04:25:58 +00003381 case NPC_ValueDependentIsNotNull:
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003382 return NPCK_NotNull;
Douglas Gregor56751b52009-09-25 04:25:58 +00003383 }
3384 }
Daniel Dunbarebc51402009-09-18 08:46:16 +00003385
Sebastian Redl72b8aef2008-10-31 14:43:28 +00003386 // Strip off a cast to void*, if it exists. Except in C++.
Argyrios Kyrtzidis3bab3d22008-08-18 23:01:59 +00003387 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
David Blaikiebbafb8a2012-03-11 07:00:24 +00003388 if (!Ctx.getLangOpts().CPlusPlus) {
Sebastian Redl72b8aef2008-10-31 14:43:28 +00003389 // Check that it is a cast to void*.
Ted Kremenekc23c7e62009-07-29 21:53:49 +00003390 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
Sebastian Redl72b8aef2008-10-31 14:43:28 +00003391 QualType Pointee = PT->getPointeeType();
Yaxun Liub7318e02017-10-13 03:37:48 +00003392 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3393 // has non-default address space it is not treated as nullptr.
3394 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3395 // since it cannot be assigned to a pointer to constant address space.
3396 bool PointeeHasDefaultAS =
3397 Pointee.getAddressSpace() == LangAS::Default ||
3398 (Ctx.getLangOpts().OpenCLVersion >= 200 &&
3399 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3400 (Ctx.getLangOpts().OpenCL &&
3401 Ctx.getLangOpts().OpenCLVersion < 200 &&
3402 Pointee.getAddressSpace() == LangAS::opencl_private);
Anastasia Stulova2446b8b2015-12-11 17:41:19 +00003403
Yaxun Liub7318e02017-10-13 03:37:48 +00003404 if (PointeeHasDefaultAS && Pointee->isVoidType() && // to void*
3405 CE->getSubExpr()->getType()->isIntegerType()) // from int.
Douglas Gregor56751b52009-09-25 04:25:58 +00003406 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
Sebastian Redl72b8aef2008-10-31 14:43:28 +00003407 }
Steve Naroffada7d422007-05-20 17:54:12 +00003408 }
Steve Naroff4871fe02008-01-14 16:10:57 +00003409 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3410 // Ignore the ImplicitCastExpr type entirely.
Douglas Gregor56751b52009-09-25 04:25:58 +00003411 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
Steve Naroff4871fe02008-01-14 16:10:57 +00003412 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3413 // Accept ((void*)0) as a null pointer constant, as many other
3414 // implementations do.
Douglas Gregor56751b52009-09-25 04:25:58 +00003415 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
Peter Collingbourne91147592011-04-15 00:35:48 +00003416 } else if (const GenericSelectionExpr *GE =
3417 dyn_cast<GenericSelectionExpr>(this)) {
Eli Friedman75807f22013-07-20 00:40:58 +00003418 if (GE->isResultDependent())
3419 return NPCK_NotNull;
Peter Collingbourne91147592011-04-15 00:35:48 +00003420 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
Eli Friedman75807f22013-07-20 00:40:58 +00003421 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3422 if (CE->isConditionDependent())
3423 return NPCK_NotNull;
3424 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
Mike Stump11289f42009-09-09 15:08:12 +00003425 } else if (const CXXDefaultArgExpr *DefaultArg
Chris Lattner58258242008-04-10 02:22:51 +00003426 = dyn_cast<CXXDefaultArgExpr>(this)) {
Richard Smith852c9db2013-04-20 22:23:05 +00003427 // See through default argument expressions.
Douglas Gregor56751b52009-09-25 04:25:58 +00003428 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
Richard Smith852c9db2013-04-20 22:23:05 +00003429 } else if (const CXXDefaultInitExpr *DefaultInit
3430 = dyn_cast<CXXDefaultInitExpr>(this)) {
3431 // See through default initializer expressions.
3432 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
Douglas Gregor3be4b122008-11-29 04:51:27 +00003433 } else if (isa<GNUNullExpr>(this)) {
3434 // The GNU __null extension is always a null pointer constant.
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003435 return NPCK_GNUNull;
Fangrui Song6907ce22018-07-30 19:24:48 +00003436 } else if (const MaterializeTemporaryExpr *M
Douglas Gregorfe314812011-06-21 17:03:29 +00003437 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3438 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
John McCallfe96e0b2011-11-06 09:01:30 +00003439 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3440 if (const Expr *Source = OVE->getSourceExpr())
3441 return Source->isNullPointerConstant(Ctx, NPC);
Steve Naroff09035312008-01-14 02:53:34 +00003442 }
Douglas Gregor3be4b122008-11-29 04:51:27 +00003443
Richard Smith89645bc2013-01-02 12:01:23 +00003444 // C++11 nullptr_t is always a null pointer constant.
Sebastian Redl576fd422009-05-10 18:38:11 +00003445 if (getType()->isNullPtrType())
Richard Smith89645bc2013-01-02 12:01:23 +00003446 return NPCK_CXX11_nullptr;
Sebastian Redl576fd422009-05-10 18:38:11 +00003447
Fariborz Jahanian3567c422010-09-27 22:42:37 +00003448 if (const RecordType *UT = getType()->getAsUnionType())
Richard Smith4055de42013-06-13 02:46:14 +00003449 if (!Ctx.getLangOpts().CPlusPlus11 &&
3450 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
Fariborz Jahanian3567c422010-09-27 22:42:37 +00003451 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3452 const Expr *InitExpr = CLE->getInitializer();
3453 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3454 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3455 }
Steve Naroff4871fe02008-01-14 16:10:57 +00003456 // This expression must be an integer type.
Fangrui Song6907ce22018-07-30 19:24:48 +00003457 if (!getType()->isIntegerType() ||
David Blaikiebbafb8a2012-03-11 07:00:24 +00003458 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003459 return NPCK_NotNull;
Mike Stump11289f42009-09-09 15:08:12 +00003460
Richard Smith2bf7fdb2013-01-02 11:42:31 +00003461 if (Ctx.getLangOpts().CPlusPlus11) {
Richard Smith4055de42013-06-13 02:46:14 +00003462 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3463 // value zero or a prvalue of type std::nullptr_t.
Reid Klecknera5eef142013-11-12 02:22:34 +00003464 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
Richard Smith4055de42013-06-13 02:46:14 +00003465 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
Reid Klecknera5eef142013-11-12 02:22:34 +00003466 if (Lit && !Lit->getValue())
3467 return NPCK_ZeroLiteral;
Alp Tokerbfa39342014-01-14 12:51:41 +00003468 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
Reid Klecknera5eef142013-11-12 02:22:34 +00003469 return NPCK_NotNull;
Richard Smith98a0a492012-02-14 21:38:30 +00003470 } else {
Richard Smith4055de42013-06-13 02:46:14 +00003471 // If we have an integer constant expression, we need to *evaluate* it and
3472 // test for the value 0.
Richard Smith98a0a492012-02-14 21:38:30 +00003473 if (!isIntegerConstantExpr(Ctx))
3474 return NPCK_NotNull;
3475 }
Chandler Carrutha8bea4b2011-02-18 23:54:50 +00003476
David Blaikie1c7c8f72012-08-08 17:33:31 +00003477 if (EvaluateKnownConstInt(Ctx) != 0)
3478 return NPCK_NotNull;
3479
3480 if (isa<IntegerLiteral>(this))
3481 return NPCK_ZeroLiteral;
3482 return NPCK_ZeroExpression;
Steve Naroff218bc2b2007-05-04 21:54:46 +00003483}
Steve Narofff7a5da12007-07-28 23:10:27 +00003484
Adrian Prantl9fc8faf2018-05-09 01:00:01 +00003485/// If this expression is an l-value for an Objective C
John McCall34376a62010-12-04 03:47:34 +00003486/// property, find the underlying property reference expression.
3487const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3488 const Expr *E = this;
3489 while (true) {
3490 assert((E->getValueKind() == VK_LValue &&
3491 E->getObjectKind() == OK_ObjCProperty) &&
3492 "expression is not a property reference");
3493 E = E->IgnoreParenCasts();
3494 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3495 if (BO->getOpcode() == BO_Comma) {
3496 E = BO->getRHS();
3497 continue;
3498 }
3499 }
3500
3501 break;
3502 }
3503
3504 return cast<ObjCPropertyRefExpr>(E);
3505}
3506
Anna Zaks97c7ce32012-10-01 20:34:04 +00003507bool Expr::isObjCSelfExpr() const {
3508 const Expr *E = IgnoreParenImpCasts();
3509
3510 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3511 if (!DRE)
3512 return false;
3513
3514 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3515 if (!Param)
3516 return false;
3517
3518 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3519 if (!M)
3520 return false;
3521
3522 return M->getSelfDecl() == Param;
3523}
3524
John McCalld25db7e2013-05-06 21:39:12 +00003525FieldDecl *Expr::getSourceBitField() {
Douglas Gregor19623dc2009-07-06 15:38:40 +00003526 Expr *E = this->IgnoreParens();
Douglas Gregor71235ec2009-05-02 02:18:30 +00003527
Douglas Gregor65eb86e2010-01-29 19:14:02 +00003528 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
John McCall34376a62010-12-04 03:47:34 +00003529 if (ICE->getCastKind() == CK_LValueToRValue ||
3530 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
Douglas Gregor65eb86e2010-01-29 19:14:02 +00003531 E = ICE->getSubExpr()->IgnoreParens();
3532 else
3533 break;
3534 }
3535
Douglas Gregor8e1cf602008-10-29 00:13:59 +00003536 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
Douglas Gregor2eedc3a2008-12-20 23:49:58 +00003537 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
Douglas Gregor71235ec2009-05-02 02:18:30 +00003538 if (Field->isBitField())
3539 return Field;
3540
George Burgess IV00f70bd2018-03-01 05:43:23 +00003541 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3542 FieldDecl *Ivar = IvarRef->getDecl();
3543 if (Ivar->isBitField())
3544 return Ivar;
3545 }
John McCalld25db7e2013-05-06 21:39:12 +00003546
Richard Smith7873de02016-08-11 22:25:46 +00003547 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
Argyrios Kyrtzidisd3f00542010-10-30 19:52:22 +00003548 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3549 if (Field->isBitField())
3550 return Field;
3551
Richard Smith7873de02016-08-11 22:25:46 +00003552 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3553 if (Expr *E = BD->getBinding())
3554 return E->getSourceBitField();
3555 }
3556
Eli Friedman609ada22011-07-13 02:05:57 +00003557 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
Douglas Gregor71235ec2009-05-02 02:18:30 +00003558 if (BinOp->isAssignmentOp() && BinOp->getLHS())
John McCalld25db7e2013-05-06 21:39:12 +00003559 return BinOp->getLHS()->getSourceBitField();
Douglas Gregor71235ec2009-05-02 02:18:30 +00003560
Eli Friedman609ada22011-07-13 02:05:57 +00003561 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
John McCalld25db7e2013-05-06 21:39:12 +00003562 return BinOp->getRHS()->getSourceBitField();
Eli Friedman609ada22011-07-13 02:05:57 +00003563 }
3564
Richard Smith5b571672014-09-24 23:55:00 +00003565 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3566 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3567 return UnOp->getSubExpr()->getSourceBitField();
3568
Craig Topper36250ad2014-05-12 05:36:57 +00003569 return nullptr;
Douglas Gregor8e1cf602008-10-29 00:13:59 +00003570}
3571
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003572bool Expr::refersToVectorElement() const {
Richard Smith7873de02016-08-11 22:25:46 +00003573 // FIXME: Why do we not just look at the ObjectKind here?
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003574 const Expr *E = this->IgnoreParens();
Fangrui Song6907ce22018-07-30 19:24:48 +00003575
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003576 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
John McCall2536c6d2010-08-25 10:28:54 +00003577 if (ICE->getValueKind() != VK_RValue &&
John McCalle3027922010-08-25 11:45:40 +00003578 ICE->getCastKind() == CK_NoOp)
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003579 E = ICE->getSubExpr()->IgnoreParens();
3580 else
3581 break;
3582 }
Fangrui Song6907ce22018-07-30 19:24:48 +00003583
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003584 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3585 return ASE->getBase()->getType()->isVectorType();
3586
3587 if (isa<ExtVectorElementExpr>(E))
3588 return true;
3589
Richard Smith7873de02016-08-11 22:25:46 +00003590 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3591 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3592 if (auto *E = BD->getBinding())
3593 return E->refersToVectorElement();
3594
Anders Carlsson8abde4b2010-01-31 17:18:49 +00003595 return false;
3596}
3597
Andrey Bokhankod9eab9c2015-08-03 10:38:10 +00003598bool Expr::refersToGlobalRegisterVar() const {
3599 const Expr *E = this->IgnoreParenImpCasts();
3600
3601 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3602 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3603 if (VD->getStorageClass() == SC_Register &&
3604 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3605 return true;
3606
3607 return false;
3608}
3609
Chris Lattnerb8211f62009-02-16 22:14:05 +00003610/// isArrow - Return true if the base expression is a pointer to vector,
3611/// return false if the base expression is a vector.
3612bool ExtVectorElementExpr::isArrow() const {
3613 return getBase()->getType()->isPointerType();
3614}
3615
Nate Begemance4d7fc2008-04-18 23:10:10 +00003616unsigned ExtVectorElementExpr::getNumElements() const {
John McCall9dd450b2009-09-21 23:43:11 +00003617 if (const VectorType *VT = getType()->getAs<VectorType>())
Nate Begemanf322eab2008-05-09 06:41:27 +00003618 return VT->getNumElements();
3619 return 1;
Chris Lattner177bd452007-08-03 16:00:20 +00003620}
3621
Nate Begemanf322eab2008-05-09 06:41:27 +00003622/// containsDuplicateElements - Return true if any element access is repeated.
Nate Begemance4d7fc2008-04-18 23:10:10 +00003623bool ExtVectorElementExpr::containsDuplicateElements() const {
Daniel Dunbarcb2a0562009-10-18 02:09:09 +00003624 // FIXME: Refactor this code to an accessor on the AST node which returns the
3625 // "type" of component access, and share with code below and in Sema.
Chris Lattner0e62c1c2011-07-23 10:55:15 +00003626 StringRef Comp = Accessor->getName();
Nate Begeman7e5185b2009-01-18 02:01:21 +00003627
3628 // Halving swizzles do not contain duplicate elements.
Daniel Dunbar125c9c92009-10-17 23:53:04 +00003629 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
Nate Begeman7e5185b2009-01-18 02:01:21 +00003630 return false;
Mike Stump11289f42009-09-09 15:08:12 +00003631
Nate Begeman7e5185b2009-01-18 02:01:21 +00003632 // Advance past s-char prefix on hex swizzles.
Daniel Dunbar125c9c92009-10-17 23:53:04 +00003633 if (Comp[0] == 's' || Comp[0] == 'S')
3634 Comp = Comp.substr(1);
Mike Stump11289f42009-09-09 15:08:12 +00003635
Daniel Dunbar125c9c92009-10-17 23:53:04 +00003636 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
Chris Lattner0e62c1c2011-07-23 10:55:15 +00003637 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
Steve Naroff0d595ca2007-07-30 03:29:09 +00003638 return true;
Daniel Dunbar125c9c92009-10-17 23:53:04 +00003639
Steve Naroff0d595ca2007-07-30 03:29:09 +00003640 return false;
3641}
Chris Lattner885b4952007-08-02 23:36:59 +00003642
Nate Begemanf322eab2008-05-09 06:41:27 +00003643/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
Nate Begemand3862152008-05-13 21:03:02 +00003644void ExtVectorElementExpr::getEncodedElementAccess(
Benjamin Kramer99383102015-07-28 16:25:32 +00003645 SmallVectorImpl<uint32_t> &Elts) const {
Chris Lattner0e62c1c2011-07-23 10:55:15 +00003646 StringRef Comp = Accessor->getName();
Pirama Arumuga Nainar98eaa622016-07-22 18:49:43 +00003647 bool isNumericAccessor = false;
3648 if (Comp[0] == 's' || Comp[0] == 'S') {
Daniel Dunbarce5a0b32009-10-18 02:09:31 +00003649 Comp = Comp.substr(1);
Pirama Arumuga Nainar98eaa622016-07-22 18:49:43 +00003650 isNumericAccessor = true;
3651 }
Mike Stump11289f42009-09-09 15:08:12 +00003652
Daniel Dunbarce5a0b32009-10-18 02:09:31 +00003653 bool isHi = Comp == "hi";
3654 bool isLo = Comp == "lo";
3655 bool isEven = Comp == "even";
3656 bool isOdd = Comp == "odd";
Mike Stump11289f42009-09-09 15:08:12 +00003657
Nate Begemanf322eab2008-05-09 06:41:27 +00003658 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3659 uint64_t Index;
Mike Stump11289f42009-09-09 15:08:12 +00003660
Nate Begemanf322eab2008-05-09 06:41:27 +00003661 if (isHi)
3662 Index = e + i;
3663 else if (isLo)
3664 Index = i;
3665 else if (isEven)
3666 Index = 2 * i;
3667 else if (isOdd)
3668 Index = 2 * i + 1;
3669 else
Pirama Arumuga Nainar98eaa622016-07-22 18:49:43 +00003670 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
Chris Lattner885b4952007-08-02 23:36:59 +00003671
Nate Begemand3862152008-05-13 21:03:02 +00003672 Elts.push_back(Index);
Chris Lattner885b4952007-08-02 23:36:59 +00003673 }
Nate Begemanf322eab2008-05-09 06:41:27 +00003674}
3675
Craig Topper37932912013-08-18 10:09:15 +00003676ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
Douglas Gregora6e053e2010-12-15 01:34:56 +00003677 QualType Type, SourceLocation BLoc,
Fangrui Song6907ce22018-07-30 19:24:48 +00003678 SourceLocation RP)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00003679 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3680 Type->isDependentType(), Type->isDependentType(),
3681 Type->isInstantiationDependentType(),
3682 Type->containsUnexpandedParameterPack()),
3683 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3684{
Benjamin Kramerc215e762012-08-24 11:54:20 +00003685 SubExprs = new (C) Stmt*[args.size()];
3686 for (unsigned i = 0; i != args.size(); i++) {
Douglas Gregora6e053e2010-12-15 01:34:56 +00003687 if (args[i]->isTypeDependent())
3688 ExprBits.TypeDependent = true;
3689 if (args[i]->isValueDependent())
3690 ExprBits.ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +00003691 if (args[i]->isInstantiationDependent())
3692 ExprBits.InstantiationDependent = true;
Douglas Gregora6e053e2010-12-15 01:34:56 +00003693 if (args[i]->containsUnexpandedParameterPack())
3694 ExprBits.ContainsUnexpandedParameterPack = true;
3695
3696 SubExprs[i] = args[i];
3697 }
3698}
3699
Craig Topper37932912013-08-18 10:09:15 +00003700void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
Nate Begeman48745922009-08-12 02:28:50 +00003701 if (SubExprs) C.Deallocate(SubExprs);
3702
Dmitri Gribenko674eaa22013-05-10 00:43:44 +00003703 this->NumExprs = Exprs.size();
Dmitri Gribenko48d6daf2013-05-10 17:30:13 +00003704 SubExprs = new (C) Stmt*[NumExprs];
Dmitri Gribenko674eaa22013-05-10 00:43:44 +00003705 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
Mike Stump11289f42009-09-09 15:08:12 +00003706}
Nate Begeman48745922009-08-12 02:28:50 +00003707
Craig Topper37932912013-08-18 10:09:15 +00003708GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
Peter Collingbourne91147592011-04-15 00:35:48 +00003709 SourceLocation GenericLoc, Expr *ControllingExpr,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003710 ArrayRef<TypeSourceInfo*> AssocTypes,
3711 ArrayRef<Expr*> AssocExprs,
3712 SourceLocation DefaultLoc,
Peter Collingbourne91147592011-04-15 00:35:48 +00003713 SourceLocation RParenLoc,
3714 bool ContainsUnexpandedParameterPack,
3715 unsigned ResultIndex)
3716 : Expr(GenericSelectionExprClass,
3717 AssocExprs[ResultIndex]->getType(),
3718 AssocExprs[ResultIndex]->getValueKind(),
3719 AssocExprs[ResultIndex]->getObjectKind(),
3720 AssocExprs[ResultIndex]->isTypeDependent(),
3721 AssocExprs[ResultIndex]->isValueDependent(),
Douglas Gregor678d76c2011-07-01 01:22:09 +00003722 AssocExprs[ResultIndex]->isInstantiationDependent(),
Peter Collingbourne91147592011-04-15 00:35:48 +00003723 ContainsUnexpandedParameterPack),
Benjamin Kramerc215e762012-08-24 11:54:20 +00003724 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3725 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3726 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3727 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
Peter Collingbourne91147592011-04-15 00:35:48 +00003728 SubExprs[CONTROLLING] = ControllingExpr;
Benjamin Kramerc215e762012-08-24 11:54:20 +00003729 assert(AssocTypes.size() == AssocExprs.size());
3730 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3731 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
Peter Collingbourne91147592011-04-15 00:35:48 +00003732}
3733
Craig Topper37932912013-08-18 10:09:15 +00003734GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
Peter Collingbourne91147592011-04-15 00:35:48 +00003735 SourceLocation GenericLoc, Expr *ControllingExpr,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003736 ArrayRef<TypeSourceInfo*> AssocTypes,
3737 ArrayRef<Expr*> AssocExprs,
3738 SourceLocation DefaultLoc,
Peter Collingbourne91147592011-04-15 00:35:48 +00003739 SourceLocation RParenLoc,
3740 bool ContainsUnexpandedParameterPack)
3741 : Expr(GenericSelectionExprClass,
3742 Context.DependentTy,
3743 VK_RValue,
3744 OK_Ordinary,
Douglas Gregor678d76c2011-07-01 01:22:09 +00003745 /*isTypeDependent=*/true,
3746 /*isValueDependent=*/true,
3747 /*isInstantiationDependent=*/true,
Peter Collingbourne91147592011-04-15 00:35:48 +00003748 ContainsUnexpandedParameterPack),
Benjamin Kramerc215e762012-08-24 11:54:20 +00003749 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3750 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3751 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3752 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
Peter Collingbourne91147592011-04-15 00:35:48 +00003753 SubExprs[CONTROLLING] = ControllingExpr;
Benjamin Kramerc215e762012-08-24 11:54:20 +00003754 assert(AssocTypes.size() == AssocExprs.size());
3755 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3756 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
Peter Collingbourne91147592011-04-15 00:35:48 +00003757}
3758
Ted Kremenek85e92ec2007-08-24 18:13:47 +00003759//===----------------------------------------------------------------------===//
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003760// DesignatedInitExpr
3761//===----------------------------------------------------------------------===//
3762
Chandler Carruth631abd92011-06-16 06:47:06 +00003763IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003764 assert(Kind == FieldDesignator && "Only valid on a field designator");
3765 if (Field.NameOrField & 0x01)
3766 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3767 else
3768 return getField()->getIdentifier();
3769}
3770
Craig Topper37932912013-08-18 10:09:15 +00003771DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
David Majnemerf7e36092016-06-23 00:15:04 +00003772 llvm::ArrayRef<Designator> Designators,
Mike Stump11289f42009-09-09 15:08:12 +00003773 SourceLocation EqualOrColonLoc,
Douglas Gregord5846a12009-04-15 06:41:24 +00003774 bool GNUSyntax,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003775 ArrayRef<Expr*> IndexExprs,
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003776 Expr *Init)
Mike Stump11289f42009-09-09 15:08:12 +00003777 : Expr(DesignatedInitExprClass, Ty,
John McCall7decc9e2010-11-18 06:31:45 +00003778 Init->getValueKind(), Init->getObjectKind(),
Douglas Gregora6e053e2010-12-15 01:34:56 +00003779 Init->isTypeDependent(), Init->isValueDependent(),
Douglas Gregor678d76c2011-07-01 01:22:09 +00003780 Init->isInstantiationDependent(),
Douglas Gregora6e053e2010-12-15 01:34:56 +00003781 Init->containsUnexpandedParameterPack()),
Mike Stump11289f42009-09-09 15:08:12 +00003782 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
David Majnemerf7e36092016-06-23 00:15:04 +00003783 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
Douglas Gregor03e8bdc2010-01-06 23:17:19 +00003784 this->Designators = new (C) Designator[NumDesignators];
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003785
3786 // Record the initializer itself.
Benjamin Kramer5733e352015-07-18 17:09:36 +00003787 child_iterator Child = child_begin();
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003788 *Child++ = Init;
3789
3790 // Copy the designators and their subexpressions, computing
3791 // value-dependence along the way.
3792 unsigned IndexIdx = 0;
3793 for (unsigned I = 0; I != NumDesignators; ++I) {
Douglas Gregord5846a12009-04-15 06:41:24 +00003794 this->Designators[I] = Designators[I];
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003795
3796 if (this->Designators[I].isArrayDesignator()) {
3797 // Compute type- and value-dependence.
3798 Expr *Index = IndexExprs[IndexIdx];
Douglas Gregora6e053e2010-12-15 01:34:56 +00003799 if (Index->isTypeDependent() || Index->isValueDependent())
David Majnemer4f217682015-01-09 01:39:09 +00003800 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +00003801 if (Index->isInstantiationDependent())
3802 ExprBits.InstantiationDependent = true;
Douglas Gregora6e053e2010-12-15 01:34:56 +00003803 // Propagate unexpanded parameter packs.
3804 if (Index->containsUnexpandedParameterPack())
3805 ExprBits.ContainsUnexpandedParameterPack = true;
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003806
3807 // Copy the index expressions into permanent storage.
3808 *Child++ = IndexExprs[IndexIdx++];
3809 } else if (this->Designators[I].isArrayRangeDesignator()) {
3810 // Compute type- and value-dependence.
3811 Expr *Start = IndexExprs[IndexIdx];
3812 Expr *End = IndexExprs[IndexIdx + 1];
Douglas Gregora6e053e2010-12-15 01:34:56 +00003813 if (Start->isTypeDependent() || Start->isValueDependent() ||
Douglas Gregor678d76c2011-07-01 01:22:09 +00003814 End->isTypeDependent() || End->isValueDependent()) {
David Majnemer4f217682015-01-09 01:39:09 +00003815 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +00003816 ExprBits.InstantiationDependent = true;
Fangrui Song6907ce22018-07-30 19:24:48 +00003817 } else if (Start->isInstantiationDependent() ||
Douglas Gregor678d76c2011-07-01 01:22:09 +00003818 End->isInstantiationDependent()) {
3819 ExprBits.InstantiationDependent = true;
3820 }
Fangrui Song6907ce22018-07-30 19:24:48 +00003821
Douglas Gregora6e053e2010-12-15 01:34:56 +00003822 // Propagate unexpanded parameter packs.
3823 if (Start->containsUnexpandedParameterPack() ||
3824 End->containsUnexpandedParameterPack())
3825 ExprBits.ContainsUnexpandedParameterPack = true;
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003826
3827 // Copy the start/end expressions into permanent storage.
3828 *Child++ = IndexExprs[IndexIdx++];
3829 *Child++ = IndexExprs[IndexIdx++];
3830 }
3831 }
3832
Benjamin Kramerc215e762012-08-24 11:54:20 +00003833 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
Douglas Gregord5846a12009-04-15 06:41:24 +00003834}
3835
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003836DesignatedInitExpr *
David Majnemerf7e36092016-06-23 00:15:04 +00003837DesignatedInitExpr::Create(const ASTContext &C,
3838 llvm::ArrayRef<Designator> Designators,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003839 ArrayRef<Expr*> IndexExprs,
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003840 SourceLocation ColonOrEqualLoc,
3841 bool UsesColonSyntax, Expr *Init) {
James Y Knighte00a67e2015-12-31 04:18:25 +00003842 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
Benjamin Kramerc3f89252016-10-20 14:27:22 +00003843 alignof(DesignatedInitExpr));
David Majnemerf7e36092016-06-23 00:15:04 +00003844 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
Douglas Gregorca1aeec2009-05-21 23:17:49 +00003845 ColonOrEqualLoc, UsesColonSyntax,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003846 IndexExprs, Init);
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003847}
3848
Craig Topper37932912013-08-18 10:09:15 +00003849DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
Douglas Gregor38676d52009-04-16 00:55:48 +00003850 unsigned NumIndexExprs) {
James Y Knighte00a67e2015-12-31 04:18:25 +00003851 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
Benjamin Kramerc3f89252016-10-20 14:27:22 +00003852 alignof(DesignatedInitExpr));
Douglas Gregor38676d52009-04-16 00:55:48 +00003853 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3854}
3855
Craig Topper37932912013-08-18 10:09:15 +00003856void DesignatedInitExpr::setDesignators(const ASTContext &C,
Douglas Gregor03e8bdc2010-01-06 23:17:19 +00003857 const Designator *Desigs,
Douglas Gregor38676d52009-04-16 00:55:48 +00003858 unsigned NumDesigs) {
Douglas Gregor03e8bdc2010-01-06 23:17:19 +00003859 Designators = new (C) Designator[NumDesigs];
Douglas Gregor38676d52009-04-16 00:55:48 +00003860 NumDesignators = NumDesigs;
3861 for (unsigned I = 0; I != NumDesigs; ++I)
3862 Designators[I] = Desigs[I];
3863}
3864
Abramo Bagnara22f8cd72011-03-16 15:08:46 +00003865SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3866 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3867 if (size() == 1)
3868 return DIE->getDesignator(0)->getSourceRange();
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00003869 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3870 DIE->getDesignator(size()-1)->getLocEnd());
Abramo Bagnara22f8cd72011-03-16 15:08:46 +00003871}
3872
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00003873SourceLocation DesignatedInitExpr::getLocStart() const {
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003874 SourceLocation StartLoc;
David Majnemerf7e36092016-06-23 00:15:04 +00003875 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3876 Designator &First = *DIE->getDesignator(0);
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003877 if (First.isFieldDesignator()) {
Douglas Gregor5c7c9cb2009-03-28 00:41:23 +00003878 if (GNUSyntax)
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003879 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3880 else
3881 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3882 } else
Chris Lattner8ba22472009-02-16 22:33:34 +00003883 StartLoc =
3884 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
Erik Verbruggen11a2ecc2012-12-25 14:51:39 +00003885 return StartLoc;
3886}
3887
3888SourceLocation DesignatedInitExpr::getLocEnd() const {
3889 return getInit()->getLocEnd();
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003890}
3891
Dmitri Gribenkod06f7ff2013-01-26 15:15:52 +00003892Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003893 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
James Y Knighte00a67e2015-12-31 04:18:25 +00003894 return getSubExpr(D.ArrayOrRange.Index + 1);
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003895}
3896
Dmitri Gribenkod06f7ff2013-01-26 15:15:52 +00003897Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
Mike Stump11289f42009-09-09 15:08:12 +00003898 assert(D.Kind == Designator::ArrayRangeDesignator &&
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003899 "Requires array range designator");
James Y Knighte00a67e2015-12-31 04:18:25 +00003900 return getSubExpr(D.ArrayOrRange.Index + 1);
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003901}
3902
Dmitri Gribenkod06f7ff2013-01-26 15:15:52 +00003903Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
Mike Stump11289f42009-09-09 15:08:12 +00003904 assert(D.Kind == Designator::ArrayRangeDesignator &&
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003905 "Requires array range designator");
James Y Knighte00a67e2015-12-31 04:18:25 +00003906 return getSubExpr(D.ArrayOrRange.Index + 2);
Douglas Gregore4a0bb72009-01-22 00:58:24 +00003907}
3908
Adrian Prantl9fc8faf2018-05-09 01:00:01 +00003909/// Replaces the designator at index @p Idx with the series
Douglas Gregord5846a12009-04-15 06:41:24 +00003910/// of designators in [First, Last).
Craig Topper37932912013-08-18 10:09:15 +00003911void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
Mike Stump11289f42009-09-09 15:08:12 +00003912 const Designator *First,
Douglas Gregord5846a12009-04-15 06:41:24 +00003913 const Designator *Last) {
3914 unsigned NumNewDesignators = Last - First;
3915 if (NumNewDesignators == 0) {
3916 std::copy_backward(Designators + Idx + 1,
3917 Designators + NumDesignators,
3918 Designators + Idx);
3919 --NumNewDesignators;
3920 return;
3921 } else if (NumNewDesignators == 1) {
3922 Designators[Idx] = *First;
3923 return;
3924 }
3925
Mike Stump11289f42009-09-09 15:08:12 +00003926 Designator *NewDesignators
Douglas Gregor03e8bdc2010-01-06 23:17:19 +00003927 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
Douglas Gregord5846a12009-04-15 06:41:24 +00003928 std::copy(Designators, Designators + Idx, NewDesignators);
3929 std::copy(First, Last, NewDesignators + Idx);
3930 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3931 NewDesignators + Idx + NumNewDesignators);
Douglas Gregord5846a12009-04-15 06:41:24 +00003932 Designators = NewDesignators;
3933 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3934}
3935
Yunzhong Gaocb779302015-06-10 00:27:52 +00003936DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3937 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3938 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3939 OK_Ordinary, false, false, false, false) {
3940 BaseAndUpdaterExprs[0] = baseExpr;
3941
3942 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3943 ILE->setType(baseExpr->getType());
3944 BaseAndUpdaterExprs[1] = ILE;
3945}
3946
3947SourceLocation DesignatedInitUpdateExpr::getLocStart() const {
3948 return getBase()->getLocStart();
3949}
3950
3951SourceLocation DesignatedInitUpdateExpr::getLocEnd() const {
3952 return getBase()->getLocEnd();
3953}
3954
Craig Topper37932912013-08-18 10:09:15 +00003955ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
Benjamin Kramerc215e762012-08-24 11:54:20 +00003956 ArrayRef<Expr*> exprs,
Sebastian Redla9351792012-02-11 23:51:47 +00003957 SourceLocation rparenloc)
3958 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
Douglas Gregor678d76c2011-07-01 01:22:09 +00003959 false, false, false, false),
Benjamin Kramerc215e762012-08-24 11:54:20 +00003960 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3961 Exprs = new (C) Stmt*[exprs.size()];
3962 for (unsigned i = 0; i != exprs.size(); ++i) {
Douglas Gregora6e053e2010-12-15 01:34:56 +00003963 if (exprs[i]->isTypeDependent())
3964 ExprBits.TypeDependent = true;
3965 if (exprs[i]->isValueDependent())
3966 ExprBits.ValueDependent = true;
Douglas Gregor678d76c2011-07-01 01:22:09 +00003967 if (exprs[i]->isInstantiationDependent())
3968 ExprBits.InstantiationDependent = true;
Douglas Gregora6e053e2010-12-15 01:34:56 +00003969 if (exprs[i]->containsUnexpandedParameterPack())
3970 ExprBits.ContainsUnexpandedParameterPack = true;
3971
Nate Begeman5ec4b312009-08-10 23:49:36 +00003972 Exprs[i] = exprs[i];
Douglas Gregora6e053e2010-12-15 01:34:56 +00003973 }
Nate Begeman5ec4b312009-08-10 23:49:36 +00003974}
3975
John McCall1bf58462011-02-16 08:02:54 +00003976const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3977 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3978 e = ewc->getSubExpr();
Douglas Gregorfe314812011-06-21 17:03:29 +00003979 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3980 e = m->GetTemporaryExpr();
John McCall1bf58462011-02-16 08:02:54 +00003981 e = cast<CXXConstructExpr>(e)->getArg(0);
3982 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3983 e = ice->getSubExpr();
3984 return cast<OpaqueValueExpr>(e);
3985}
3986
Craig Topper37932912013-08-18 10:09:15 +00003987PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3988 EmptyShell sh,
John McCallfe96e0b2011-11-06 09:01:30 +00003989 unsigned numSemanticExprs) {
James Y Knighte00a67e2015-12-31 04:18:25 +00003990 void *buffer =
3991 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
Benjamin Kramerc3f89252016-10-20 14:27:22 +00003992 alignof(PseudoObjectExpr));
John McCallfe96e0b2011-11-06 09:01:30 +00003993 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3994}
3995
3996PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3997 : Expr(PseudoObjectExprClass, shell) {
3998 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
3999}
4000
Craig Topper37932912013-08-18 10:09:15 +00004001PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
John McCallfe96e0b2011-11-06 09:01:30 +00004002 ArrayRef<Expr*> semantics,
4003 unsigned resultIndex) {
4004 assert(syntax && "no syntactic expression!");
Eugene Zelenkoae304b02017-11-17 18:09:48 +00004005 assert(semantics.size() && "no semantic expressions!");
John McCallfe96e0b2011-11-06 09:01:30 +00004006
4007 QualType type;
4008 ExprValueKind VK;
4009 if (resultIndex == NoResult) {
4010 type = C.VoidTy;
4011 VK = VK_RValue;
4012 } else {
4013 assert(resultIndex < semantics.size());
4014 type = semantics[resultIndex]->getType();
4015 VK = semantics[resultIndex]->getValueKind();
4016 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
4017 }
4018
James Y Knighte00a67e2015-12-31 04:18:25 +00004019 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
Benjamin Kramerc3f89252016-10-20 14:27:22 +00004020 alignof(PseudoObjectExpr));
John McCallfe96e0b2011-11-06 09:01:30 +00004021 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4022 resultIndex);
4023}
4024
4025PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4026 Expr *syntax, ArrayRef<Expr*> semantics,
4027 unsigned resultIndex)
4028 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4029 /*filled in at end of ctor*/ false, false, false, false) {
4030 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4031 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4032
4033 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4034 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4035 getSubExprsBuffer()[i] = E;
4036
4037 if (E->isTypeDependent())
4038 ExprBits.TypeDependent = true;
4039 if (E->isValueDependent())
4040 ExprBits.ValueDependent = true;
4041 if (E->isInstantiationDependent())
4042 ExprBits.InstantiationDependent = true;
4043 if (E->containsUnexpandedParameterPack())
4044 ExprBits.ContainsUnexpandedParameterPack = true;
4045
4046 if (isa<OpaqueValueExpr>(E))
Craig Topper36250ad2014-05-12 05:36:57 +00004047 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
John McCallfe96e0b2011-11-06 09:01:30 +00004048 "opaque-value semantic expressions for pseudo-object "
4049 "operations must have sources");
4050 }
4051}
4052
Douglas Gregore4a0bb72009-01-22 00:58:24 +00004053//===----------------------------------------------------------------------===//
Ted Kremenek85e92ec2007-08-24 18:13:47 +00004054// Child Iterators for iterating over subexpressions/substatements
4055//===----------------------------------------------------------------------===//
4056
Peter Collingbournee190dee2011-03-11 19:24:49 +00004057// UnaryExprOrTypeTraitExpr
4058Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
Aaron Ballman4c54fe02017-04-11 20:21:30 +00004059 const_child_range CCR =
4060 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4061 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4062}
4063
4064Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
Sebastian Redl6f282892008-11-11 17:56:53 +00004065 // If this is of a type and the type is a VLA type (and not a typedef), the
4066 // size expression of the VLA needs to be treated as an executable expression.
4067 // Why isn't this weirdness documented better in StmtIterator?
4068 if (isArgumentType()) {
Aaron Ballman4c54fe02017-04-11 20:21:30 +00004069 if (const VariableArrayType *T =
4070 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4071 return const_child_range(const_child_iterator(T), const_child_iterator());
4072 return const_child_range(const_child_iterator(), const_child_iterator());
Sebastian Redl6f282892008-11-11 17:56:53 +00004073 }
Aaron Ballman4c54fe02017-04-11 20:21:30 +00004074 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
Ted Kremenek04746ce2007-10-18 23:28:49 +00004075}
Fariborz Jahaniana32aaef2007-10-17 16:58:11 +00004076
Benjamin Kramerc215e762012-08-24 11:54:20 +00004077AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
Eli Friedman8d3e43f2011-10-14 22:48:56 +00004078 QualType t, AtomicOp op, SourceLocation RP)
Eugene Zelenkoae304b02017-11-17 18:09:48 +00004079 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4080 false, false, false, false),
4081 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4082{
Benjamin Kramerc215e762012-08-24 11:54:20 +00004083 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4084 for (unsigned i = 0; i != args.size(); i++) {
Eli Friedman8d3e43f2011-10-14 22:48:56 +00004085 if (args[i]->isTypeDependent())
4086 ExprBits.TypeDependent = true;
4087 if (args[i]->isValueDependent())
4088 ExprBits.ValueDependent = true;
4089 if (args[i]->isInstantiationDependent())
4090 ExprBits.InstantiationDependent = true;
4091 if (args[i]->containsUnexpandedParameterPack())
4092 ExprBits.ContainsUnexpandedParameterPack = true;
4093
4094 SubExprs[i] = args[i];
4095 }
4096}
Richard Smithaa22a8c2012-04-10 22:49:28 +00004097
4098unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4099 switch (Op) {
Richard Smithfeea8832012-04-12 05:08:17 +00004100 case AO__c11_atomic_init:
Yaxun Liu39195062017-08-04 18:16:31 +00004101 case AO__opencl_atomic_init:
Yaxun Liu39195062017-08-04 18:16:31 +00004102 case AO__c11_atomic_load:
Yaxun Liu39195062017-08-04 18:16:31 +00004103 case AO__atomic_load_n:
Yaxun Liu30d652a2017-08-15 16:02:49 +00004104 return 2;
Richard Smithfeea8832012-04-12 05:08:17 +00004105
Yaxun Liu30d652a2017-08-15 16:02:49 +00004106 case AO__opencl_atomic_load:
Richard Smithfeea8832012-04-12 05:08:17 +00004107 case AO__c11_atomic_store:
4108 case AO__c11_atomic_exchange:
4109 case AO__atomic_load:
4110 case AO__atomic_store:
4111 case AO__atomic_store_n:
4112 case AO__atomic_exchange_n:
4113 case AO__c11_atomic_fetch_add:
4114 case AO__c11_atomic_fetch_sub:
4115 case AO__c11_atomic_fetch_and:
4116 case AO__c11_atomic_fetch_or:
4117 case AO__c11_atomic_fetch_xor:
4118 case AO__atomic_fetch_add:
4119 case AO__atomic_fetch_sub:
4120 case AO__atomic_fetch_and:
4121 case AO__atomic_fetch_or:
4122 case AO__atomic_fetch_xor:
Richard Smithd65cee92012-04-13 06:31:38 +00004123 case AO__atomic_fetch_nand:
Richard Smithfeea8832012-04-12 05:08:17 +00004124 case AO__atomic_add_fetch:
4125 case AO__atomic_sub_fetch:
4126 case AO__atomic_and_fetch:
4127 case AO__atomic_or_fetch:
4128 case AO__atomic_xor_fetch:
Richard Smithd65cee92012-04-13 06:31:38 +00004129 case AO__atomic_nand_fetch:
Elena Demikhovskyd31327d2018-05-13 07:45:58 +00004130 case AO__atomic_fetch_min:
4131 case AO__atomic_fetch_max:
Yaxun Liu30d652a2017-08-15 16:02:49 +00004132 return 3;
Richard Smithfeea8832012-04-12 05:08:17 +00004133
Yaxun Liu30d652a2017-08-15 16:02:49 +00004134 case AO__opencl_atomic_store:
4135 case AO__opencl_atomic_exchange:
4136 case AO__opencl_atomic_fetch_add:
4137 case AO__opencl_atomic_fetch_sub:
4138 case AO__opencl_atomic_fetch_and:
4139 case AO__opencl_atomic_fetch_or:
4140 case AO__opencl_atomic_fetch_xor:
4141 case AO__opencl_atomic_fetch_min:
4142 case AO__opencl_atomic_fetch_max:
Richard Smithfeea8832012-04-12 05:08:17 +00004143 case AO__atomic_exchange:
Yaxun Liu30d652a2017-08-15 16:02:49 +00004144 return 4;
Richard Smithfeea8832012-04-12 05:08:17 +00004145
4146 case AO__c11_atomic_compare_exchange_strong:
4147 case AO__c11_atomic_compare_exchange_weak:
Yaxun Liu30d652a2017-08-15 16:02:49 +00004148 return 5;
4149
Yaxun Liu39195062017-08-04 18:16:31 +00004150 case AO__opencl_atomic_compare_exchange_strong:
4151 case AO__opencl_atomic_compare_exchange_weak:
Richard Smithfeea8832012-04-12 05:08:17 +00004152 case AO__atomic_compare_exchange:
4153 case AO__atomic_compare_exchange_n:
Yaxun Liu30d652a2017-08-15 16:02:49 +00004154 return 6;
Richard Smithaa22a8c2012-04-10 22:49:28 +00004155 }
4156 llvm_unreachable("unknown atomic op");
4157}
Alexey Bataeva1764212015-09-30 09:22:36 +00004158
Yaxun Liu39195062017-08-04 18:16:31 +00004159QualType AtomicExpr::getValueType() const {
4160 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4161 if (auto AT = T->getAs<AtomicType>())
4162 return AT->getValueType();
4163 return T;
4164}
4165
Alexey Bataev31300ed2016-02-04 11:27:03 +00004166QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
Alexey Bataeva1764212015-09-30 09:22:36 +00004167 unsigned ArraySectionCount = 0;
4168 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4169 Base = OASE->getBase();
4170 ++ArraySectionCount;
4171 }
Alexey Bataev31300ed2016-02-04 11:27:03 +00004172 while (auto *ASE =
4173 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
Alexey Bataevf24e7b12015-10-08 09:10:53 +00004174 Base = ASE->getBase();
4175 ++ArraySectionCount;
4176 }
Alexey Bataev31300ed2016-02-04 11:27:03 +00004177 Base = Base->IgnoreParenImpCasts();
Alexey Bataeva1764212015-09-30 09:22:36 +00004178 auto OriginalTy = Base->getType();
4179 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4180 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4181 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4182
4183 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4184 if (OriginalTy->isAnyPointerType())
4185 OriginalTy = OriginalTy->getPointeeType();
4186 else {
Eugene Zelenkoae304b02017-11-17 18:09:48 +00004187 assert (OriginalTy->isArrayType());
Alexey Bataeva1764212015-09-30 09:22:36 +00004188 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
4189 }
4190 }
4191 return OriginalTy;
4192}