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Chris Lattner4b009652007-07-25 00:24:17 +00001//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner959e5be2007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chris Lattner4b009652007-07-25 00:24:17 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the ASTContext interface.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/AST/ASTContext.h"
Argiris Kirtzidisea29d1e2008-08-07 20:55:28 +000015#include "clang/AST/DeclCXX.h"
Steve Naroff3fafa102007-10-01 19:00:59 +000016#include "clang/AST/DeclObjC.h"
Douglas Gregor279272e2009-02-04 19:02:06 +000017#include "clang/AST/DeclTemplate.h"
Daniel Dunbarde300732008-08-11 04:54:23 +000018#include "clang/AST/Expr.h"
19#include "clang/AST/RecordLayout.h"
Chris Lattner4b009652007-07-25 00:24:17 +000020#include "clang/Basic/TargetInfo.h"
Anders Carlsson36f07d82007-10-29 05:01:08 +000021#include "llvm/ADT/StringExtras.h"
Ted Kremenek738e6c02007-10-31 17:10:13 +000022#include "llvm/Bitcode/Serialize.h"
23#include "llvm/Bitcode/Deserialize.h"
Nate Begeman7903d052009-01-18 06:42:49 +000024#include "llvm/Support/MathExtras.h"
Anders Carlsson36f07d82007-10-29 05:01:08 +000025
Chris Lattner4b009652007-07-25 00:24:17 +000026using namespace clang;
27
28enum FloatingRank {
29 FloatRank, DoubleRank, LongDoubleRank
30};
31
Chris Lattner2fda0ed2008-10-05 17:34:18 +000032ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM,
33 TargetInfo &t,
Daniel Dunbarde300732008-08-11 04:54:23 +000034 IdentifierTable &idents, SelectorTable &sels,
Steve Naroff207b9ec2009-01-27 23:20:32 +000035 bool FreeMem, unsigned size_reserve) :
Anders Carlssonf58cac72008-08-30 19:34:46 +000036 CFConstantStringTypeDecl(0), ObjCFastEnumerationStateTypeDecl(0),
Steve Naroff207b9ec2009-01-27 23:20:32 +000037 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t),
Douglas Gregor24afd4a2008-11-17 14:58:09 +000038 Idents(idents), Selectors(sels)
Daniel Dunbarde300732008-08-11 04:54:23 +000039{
40 if (size_reserve > 0) Types.reserve(size_reserve);
41 InitBuiltinTypes();
Douglas Gregor23d23262009-02-14 20:49:29 +000042 BuiltinInfo.InitializeBuiltins(idents, Target, LangOpts.Freestanding);
Daniel Dunbarde300732008-08-11 04:54:23 +000043 TUDecl = TranslationUnitDecl::Create(*this);
44}
45
Chris Lattner4b009652007-07-25 00:24:17 +000046ASTContext::~ASTContext() {
47 // Deallocate all the types.
48 while (!Types.empty()) {
Ted Kremenekdb4d5972008-05-21 16:38:54 +000049 Types.back()->Destroy(*this);
Chris Lattner4b009652007-07-25 00:24:17 +000050 Types.pop_back();
51 }
Eli Friedman65489b72008-05-27 03:08:09 +000052
Nuno Lopes355a8682008-12-17 22:30:25 +000053 {
54 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator
55 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end();
56 while (I != E) {
57 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second);
58 delete R;
59 }
60 }
61
62 {
63 llvm::DenseMap<const ObjCInterfaceDecl*, const ASTRecordLayout*>::iterator
64 I = ASTObjCInterfaces.begin(), E = ASTObjCInterfaces.end();
65 while (I != E) {
66 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second);
67 delete R;
68 }
69 }
70
71 {
72 llvm::DenseMap<const ObjCInterfaceDecl*, const RecordDecl*>::iterator
73 I = ASTRecordForInterface.begin(), E = ASTRecordForInterface.end();
74 while (I != E) {
75 RecordDecl *R = const_cast<RecordDecl*>((I++)->second);
76 R->Destroy(*this);
77 }
78 }
79
Eli Friedman65489b72008-05-27 03:08:09 +000080 TUDecl->Destroy(*this);
Chris Lattner4b009652007-07-25 00:24:17 +000081}
82
83void ASTContext::PrintStats() const {
84 fprintf(stderr, "*** AST Context Stats:\n");
85 fprintf(stderr, " %d types total.\n", (int)Types.size());
86 unsigned NumBuiltin = 0, NumPointer = 0, NumArray = 0, NumFunctionP = 0;
Daniel Dunbar47677342008-09-26 03:23:00 +000087 unsigned NumVector = 0, NumComplex = 0, NumBlockPointer = 0;
Chris Lattner4b009652007-07-25 00:24:17 +000088 unsigned NumFunctionNP = 0, NumTypeName = 0, NumTagged = 0, NumReference = 0;
Sebastian Redl75555032009-01-24 21:16:55 +000089 unsigned NumMemberPointer = 0;
Chris Lattner4b009652007-07-25 00:24:17 +000090
91 unsigned NumTagStruct = 0, NumTagUnion = 0, NumTagEnum = 0, NumTagClass = 0;
Ted Kremenek42730c52008-01-07 19:49:32 +000092 unsigned NumObjCInterfaces = 0, NumObjCQualifiedInterfaces = 0;
93 unsigned NumObjCQualifiedIds = 0;
Steve Naroffe0430632008-05-21 15:59:22 +000094 unsigned NumTypeOfTypes = 0, NumTypeOfExprs = 0;
Chris Lattner4b009652007-07-25 00:24:17 +000095
96 for (unsigned i = 0, e = Types.size(); i != e; ++i) {
97 Type *T = Types[i];
98 if (isa<BuiltinType>(T))
99 ++NumBuiltin;
100 else if (isa<PointerType>(T))
101 ++NumPointer;
Daniel Dunbar47677342008-09-26 03:23:00 +0000102 else if (isa<BlockPointerType>(T))
103 ++NumBlockPointer;
Chris Lattner4b009652007-07-25 00:24:17 +0000104 else if (isa<ReferenceType>(T))
105 ++NumReference;
Sebastian Redl75555032009-01-24 21:16:55 +0000106 else if (isa<MemberPointerType>(T))
107 ++NumMemberPointer;
Chris Lattner4b009652007-07-25 00:24:17 +0000108 else if (isa<ComplexType>(T))
109 ++NumComplex;
110 else if (isa<ArrayType>(T))
111 ++NumArray;
112 else if (isa<VectorType>(T))
113 ++NumVector;
114 else if (isa<FunctionTypeNoProto>(T))
115 ++NumFunctionNP;
116 else if (isa<FunctionTypeProto>(T))
117 ++NumFunctionP;
118 else if (isa<TypedefType>(T))
119 ++NumTypeName;
120 else if (TagType *TT = dyn_cast<TagType>(T)) {
121 ++NumTagged;
Argiris Kirtzidisc6cc7d52008-06-09 23:19:58 +0000122 switch (TT->getDecl()->getTagKind()) {
Chris Lattner4b009652007-07-25 00:24:17 +0000123 default: assert(0 && "Unknown tagged type!");
Argiris Kirtzidisc6cc7d52008-06-09 23:19:58 +0000124 case TagDecl::TK_struct: ++NumTagStruct; break;
125 case TagDecl::TK_union: ++NumTagUnion; break;
126 case TagDecl::TK_class: ++NumTagClass; break;
127 case TagDecl::TK_enum: ++NumTagEnum; break;
Chris Lattner4b009652007-07-25 00:24:17 +0000128 }
Ted Kremenek42730c52008-01-07 19:49:32 +0000129 } else if (isa<ObjCInterfaceType>(T))
130 ++NumObjCInterfaces;
131 else if (isa<ObjCQualifiedInterfaceType>(T))
132 ++NumObjCQualifiedInterfaces;
133 else if (isa<ObjCQualifiedIdType>(T))
134 ++NumObjCQualifiedIds;
Steve Naroffe0430632008-05-21 15:59:22 +0000135 else if (isa<TypeOfType>(T))
136 ++NumTypeOfTypes;
137 else if (isa<TypeOfExpr>(T))
138 ++NumTypeOfExprs;
Steve Naroff948fd372007-09-17 14:16:13 +0000139 else {
Chris Lattner8a35b462007-12-12 06:43:05 +0000140 QualType(T, 0).dump();
Chris Lattner4b009652007-07-25 00:24:17 +0000141 assert(0 && "Unknown type!");
142 }
143 }
144
145 fprintf(stderr, " %d builtin types\n", NumBuiltin);
146 fprintf(stderr, " %d pointer types\n", NumPointer);
Daniel Dunbar47677342008-09-26 03:23:00 +0000147 fprintf(stderr, " %d block pointer types\n", NumBlockPointer);
Chris Lattner4b009652007-07-25 00:24:17 +0000148 fprintf(stderr, " %d reference types\n", NumReference);
Sebastian Redl75555032009-01-24 21:16:55 +0000149 fprintf(stderr, " %d member pointer types\n", NumMemberPointer);
Chris Lattner4b009652007-07-25 00:24:17 +0000150 fprintf(stderr, " %d complex types\n", NumComplex);
151 fprintf(stderr, " %d array types\n", NumArray);
152 fprintf(stderr, " %d vector types\n", NumVector);
153 fprintf(stderr, " %d function types with proto\n", NumFunctionP);
154 fprintf(stderr, " %d function types with no proto\n", NumFunctionNP);
155 fprintf(stderr, " %d typename (typedef) types\n", NumTypeName);
156 fprintf(stderr, " %d tagged types\n", NumTagged);
157 fprintf(stderr, " %d struct types\n", NumTagStruct);
158 fprintf(stderr, " %d union types\n", NumTagUnion);
159 fprintf(stderr, " %d class types\n", NumTagClass);
160 fprintf(stderr, " %d enum types\n", NumTagEnum);
Ted Kremenek42730c52008-01-07 19:49:32 +0000161 fprintf(stderr, " %d interface types\n", NumObjCInterfaces);
Chris Lattner8a35b462007-12-12 06:43:05 +0000162 fprintf(stderr, " %d protocol qualified interface types\n",
Ted Kremenek42730c52008-01-07 19:49:32 +0000163 NumObjCQualifiedInterfaces);
Fariborz Jahaniane76e8412007-12-17 21:03:50 +0000164 fprintf(stderr, " %d protocol qualified id types\n",
Ted Kremenek42730c52008-01-07 19:49:32 +0000165 NumObjCQualifiedIds);
Steve Naroffe0430632008-05-21 15:59:22 +0000166 fprintf(stderr, " %d typeof types\n", NumTypeOfTypes);
167 fprintf(stderr, " %d typeof exprs\n", NumTypeOfExprs);
168
Chris Lattner4b009652007-07-25 00:24:17 +0000169 fprintf(stderr, "Total bytes = %d\n", int(NumBuiltin*sizeof(BuiltinType)+
170 NumPointer*sizeof(PointerType)+NumArray*sizeof(ArrayType)+
171 NumComplex*sizeof(ComplexType)+NumVector*sizeof(VectorType)+
Sebastian Redl75555032009-01-24 21:16:55 +0000172 NumMemberPointer*sizeof(MemberPointerType)+
Chris Lattner4b009652007-07-25 00:24:17 +0000173 NumFunctionP*sizeof(FunctionTypeProto)+
174 NumFunctionNP*sizeof(FunctionTypeNoProto)+
Steve Naroffe0430632008-05-21 15:59:22 +0000175 NumTypeName*sizeof(TypedefType)+NumTagged*sizeof(TagType)+
176 NumTypeOfTypes*sizeof(TypeOfType)+NumTypeOfExprs*sizeof(TypeOfExpr)));
Chris Lattner4b009652007-07-25 00:24:17 +0000177}
178
179
180void ASTContext::InitBuiltinType(QualType &R, BuiltinType::Kind K) {
Steve Naroff93fd2112009-01-27 22:08:43 +0000181 Types.push_back((R = QualType(new (*this,8) BuiltinType(K),0)).getTypePtr());
Chris Lattner4b009652007-07-25 00:24:17 +0000182}
183
Chris Lattner4b009652007-07-25 00:24:17 +0000184void ASTContext::InitBuiltinTypes() {
185 assert(VoidTy.isNull() && "Context reinitialized?");
186
187 // C99 6.2.5p19.
188 InitBuiltinType(VoidTy, BuiltinType::Void);
189
190 // C99 6.2.5p2.
191 InitBuiltinType(BoolTy, BuiltinType::Bool);
192 // C99 6.2.5p3.
Chris Lattner8cd0e932008-03-05 18:54:05 +0000193 if (Target.isCharSigned())
Chris Lattner4b009652007-07-25 00:24:17 +0000194 InitBuiltinType(CharTy, BuiltinType::Char_S);
195 else
196 InitBuiltinType(CharTy, BuiltinType::Char_U);
197 // C99 6.2.5p4.
198 InitBuiltinType(SignedCharTy, BuiltinType::SChar);
199 InitBuiltinType(ShortTy, BuiltinType::Short);
200 InitBuiltinType(IntTy, BuiltinType::Int);
201 InitBuiltinType(LongTy, BuiltinType::Long);
202 InitBuiltinType(LongLongTy, BuiltinType::LongLong);
203
204 // C99 6.2.5p6.
205 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar);
206 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort);
207 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt);
208 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong);
209 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong);
210
211 // C99 6.2.5p10.
212 InitBuiltinType(FloatTy, BuiltinType::Float);
213 InitBuiltinType(DoubleTy, BuiltinType::Double);
214 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble);
Argiris Kirtzidis1ed03e72008-08-09 16:51:54 +0000215
216 // C++ 3.9.1p5
217 InitBuiltinType(WCharTy, BuiltinType::WChar);
218
Douglas Gregord2baafd2008-10-21 16:13:35 +0000219 // Placeholder type for functions.
Douglas Gregor1b21c7f2008-12-05 23:32:09 +0000220 InitBuiltinType(OverloadTy, BuiltinType::Overload);
221
222 // Placeholder type for type-dependent expressions whose type is
223 // completely unknown. No code should ever check a type against
224 // DependentTy and users should never see it; however, it is here to
225 // help diagnose failures to properly check for type-dependent
226 // expressions.
227 InitBuiltinType(DependentTy, BuiltinType::Dependent);
Douglas Gregord2baafd2008-10-21 16:13:35 +0000228
Chris Lattner4b009652007-07-25 00:24:17 +0000229 // C99 6.2.5p11.
230 FloatComplexTy = getComplexType(FloatTy);
231 DoubleComplexTy = getComplexType(DoubleTy);
232 LongDoubleComplexTy = getComplexType(LongDoubleTy);
Douglas Gregord2baafd2008-10-21 16:13:35 +0000233
Steve Naroff9d12c902007-10-15 14:41:52 +0000234 BuiltinVaListType = QualType();
Ted Kremenek42730c52008-01-07 19:49:32 +0000235 ObjCIdType = QualType();
Steve Naroff9d12c902007-10-15 14:41:52 +0000236 IdStructType = 0;
Ted Kremenek42730c52008-01-07 19:49:32 +0000237 ObjCClassType = QualType();
Anders Carlsson7f23e3d2007-10-31 02:53:19 +0000238 ClassStructType = 0;
239
Ted Kremenek42730c52008-01-07 19:49:32 +0000240 ObjCConstantStringType = QualType();
Fariborz Jahanianc81f3162007-10-29 22:57:28 +0000241
242 // void * type
243 VoidPtrTy = getPointerType(VoidTy);
Chris Lattner4b009652007-07-25 00:24:17 +0000244}
245
246//===----------------------------------------------------------------------===//
247// Type Sizing and Analysis
248//===----------------------------------------------------------------------===//
249
Chris Lattner2a674dc2008-06-30 18:32:54 +0000250/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified
251/// scalar floating point type.
252const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const {
253 const BuiltinType *BT = T->getAsBuiltinType();
254 assert(BT && "Not a floating point type!");
255 switch (BT->getKind()) {
256 default: assert(0 && "Not a floating point type!");
257 case BuiltinType::Float: return Target.getFloatFormat();
258 case BuiltinType::Double: return Target.getDoubleFormat();
259 case BuiltinType::LongDouble: return Target.getLongDoubleFormat();
260 }
261}
262
Chris Lattnerbd3153e2009-01-24 21:53:27 +0000263/// getDeclAlign - Return a conservative estimate of the alignment of the
264/// specified decl. Note that bitfields do not have a valid alignment, so
265/// this method will assert on them.
266unsigned ASTContext::getDeclAlign(const Decl *D) {
267 // FIXME: If attribute(align) is specified on the decl, round up to it.
268
269 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
270 QualType T = VD->getType();
271 // Incomplete or function types default to 1.
272 if (T->isIncompleteType() || T->isFunctionType())
273 return 1;
274
275 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T))
276 T = cast<ArrayType>(T)->getElementType();
277
278 return getTypeAlign(T);
279 }
280
281 return 1;
282}
Chris Lattner2a674dc2008-06-30 18:32:54 +0000283
Chris Lattner4b009652007-07-25 00:24:17 +0000284/// getTypeSize - Return the size of the specified type, in bits. This method
285/// does not work on incomplete types.
286std::pair<uint64_t, unsigned>
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000287ASTContext::getTypeInfo(const Type *T) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000288 T = getCanonicalType(T);
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000289 uint64_t Width;
Chris Lattner4b009652007-07-25 00:24:17 +0000290 unsigned Align;
291 switch (T->getTypeClass()) {
292 case Type::TypeName: assert(0 && "Not a canonical type!");
293 case Type::FunctionNoProto:
294 case Type::FunctionProto:
295 default:
296 assert(0 && "Incomplete types have no size!");
Steve Naroff83c13012007-08-30 01:06:46 +0000297 case Type::VariableArray:
298 assert(0 && "VLAs not implemented yet!");
Douglas Gregor1b21c7f2008-12-05 23:32:09 +0000299 case Type::DependentSizedArray:
300 assert(0 && "Dependently-sized arrays don't have a known size");
Steve Naroff83c13012007-08-30 01:06:46 +0000301 case Type::ConstantArray: {
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000302 const ConstantArrayType *CAT = cast<ConstantArrayType>(T);
Steve Naroff83c13012007-08-30 01:06:46 +0000303
Chris Lattner8cd0e932008-03-05 18:54:05 +0000304 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType());
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000305 Width = EltInfo.first*CAT->getSize().getZExtValue();
Chris Lattner4b009652007-07-25 00:24:17 +0000306 Align = EltInfo.second;
307 break;
Christopher Lamb82c758b2007-12-29 05:10:55 +0000308 }
Nate Begemanaf6ed502008-04-18 23:10:10 +0000309 case Type::ExtVector:
Chris Lattner4b009652007-07-25 00:24:17 +0000310 case Type::Vector: {
311 std::pair<uint64_t, unsigned> EltInfo =
Chris Lattner8cd0e932008-03-05 18:54:05 +0000312 getTypeInfo(cast<VectorType>(T)->getElementType());
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000313 Width = EltInfo.first*cast<VectorType>(T)->getNumElements();
Eli Friedman5949a022008-05-30 09:31:38 +0000314 Align = Width;
Nate Begeman7903d052009-01-18 06:42:49 +0000315 // If the alignment is not a power of 2, round up to the next power of 2.
316 // This happens for non-power-of-2 length vectors.
317 // FIXME: this should probably be a target property.
318 Align = 1 << llvm::Log2_32_Ceil(Align);
Chris Lattner4b009652007-07-25 00:24:17 +0000319 break;
320 }
321
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000322 case Type::Builtin:
Chris Lattner4b009652007-07-25 00:24:17 +0000323 switch (cast<BuiltinType>(T)->getKind()) {
324 default: assert(0 && "Unknown builtin type!");
325 case BuiltinType::Void:
326 assert(0 && "Incomplete types have no size!");
Chris Lattnerb66237b2007-12-19 19:23:28 +0000327 case BuiltinType::Bool:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000328 Width = Target.getBoolWidth();
329 Align = Target.getBoolAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000330 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000331 case BuiltinType::Char_S:
332 case BuiltinType::Char_U:
333 case BuiltinType::UChar:
Chris Lattnerb66237b2007-12-19 19:23:28 +0000334 case BuiltinType::SChar:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000335 Width = Target.getCharWidth();
336 Align = Target.getCharAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000337 break;
Argiris Kirtzidis1ed03e72008-08-09 16:51:54 +0000338 case BuiltinType::WChar:
339 Width = Target.getWCharWidth();
340 Align = Target.getWCharAlign();
341 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000342 case BuiltinType::UShort:
Chris Lattnerb66237b2007-12-19 19:23:28 +0000343 case BuiltinType::Short:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000344 Width = Target.getShortWidth();
345 Align = Target.getShortAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000346 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000347 case BuiltinType::UInt:
Chris Lattnerb66237b2007-12-19 19:23:28 +0000348 case BuiltinType::Int:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000349 Width = Target.getIntWidth();
350 Align = Target.getIntAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000351 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000352 case BuiltinType::ULong:
Chris Lattnerb66237b2007-12-19 19:23:28 +0000353 case BuiltinType::Long:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000354 Width = Target.getLongWidth();
355 Align = Target.getLongAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000356 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000357 case BuiltinType::ULongLong:
Chris Lattnerb66237b2007-12-19 19:23:28 +0000358 case BuiltinType::LongLong:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000359 Width = Target.getLongLongWidth();
360 Align = Target.getLongLongAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000361 break;
362 case BuiltinType::Float:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000363 Width = Target.getFloatWidth();
364 Align = Target.getFloatAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000365 break;
366 case BuiltinType::Double:
Chris Lattner1d78a862008-04-07 07:01:58 +0000367 Width = Target.getDoubleWidth();
368 Align = Target.getDoubleAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000369 break;
370 case BuiltinType::LongDouble:
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000371 Width = Target.getLongDoubleWidth();
372 Align = Target.getLongDoubleAlign();
Chris Lattnerb66237b2007-12-19 19:23:28 +0000373 break;
Chris Lattner4b009652007-07-25 00:24:17 +0000374 }
375 break;
Eli Friedmanff3fcdf2009-02-13 02:31:07 +0000376 case Type::FixedWidthInt:
377 // FIXME: This isn't precisely correct; the width/alignment should depend
378 // on the available types for the target
379 Width = cast<FixedWidthIntType>(T)->getWidth();
Chris Lattnere9174982009-02-15 21:20:13 +0000380 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8);
Eli Friedmanff3fcdf2009-02-13 02:31:07 +0000381 Align = Width;
382 break;
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000383 case Type::ExtQual:
Chris Lattner8cd0e932008-03-05 18:54:05 +0000384 // FIXME: Pointers into different addr spaces could have different sizes and
385 // alignment requirements: getPointerInfo should take an AddrSpace.
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000386 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0));
Ted Kremenek42730c52008-01-07 19:49:32 +0000387 case Type::ObjCQualifiedId:
Chris Lattner1d78a862008-04-07 07:01:58 +0000388 Width = Target.getPointerWidth(0);
Chris Lattner461a6c52008-03-08 08:34:58 +0000389 Align = Target.getPointerAlign(0);
Chris Lattnerb66237b2007-12-19 19:23:28 +0000390 break;
Steve Naroff62f09f52008-09-24 15:05:44 +0000391 case Type::BlockPointer: {
392 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace();
393 Width = Target.getPointerWidth(AS);
394 Align = Target.getPointerAlign(AS);
395 break;
396 }
Chris Lattner461a6c52008-03-08 08:34:58 +0000397 case Type::Pointer: {
398 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace();
Chris Lattner1d78a862008-04-07 07:01:58 +0000399 Width = Target.getPointerWidth(AS);
Chris Lattner461a6c52008-03-08 08:34:58 +0000400 Align = Target.getPointerAlign(AS);
401 break;
402 }
Chris Lattner4b009652007-07-25 00:24:17 +0000403 case Type::Reference:
404 // "When applied to a reference or a reference type, the result is the size
405 // of the referenced type." C++98 5.3.3p2: expr.sizeof.
Chris Lattnerb66237b2007-12-19 19:23:28 +0000406 // FIXME: This is wrong for struct layout: a reference in a struct has
407 // pointer size.
Chris Lattnercfac88d2008-04-02 17:35:06 +0000408 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType());
Sebastian Redl75555032009-01-24 21:16:55 +0000409 case Type::MemberPointer: {
Sebastian Redl18cffee2009-01-24 23:29:36 +0000410 // FIXME: This is not only platform- but also ABI-dependent. We follow
Sebastian Redl75555032009-01-24 21:16:55 +0000411 // the GCC ABI, where pointers to data are one pointer large, pointers to
412 // functions two pointers. But if we want to support ABI compatibility with
Sebastian Redl18cffee2009-01-24 23:29:36 +0000413 // other compilers too, we need to delegate this completely to TargetInfo
414 // or some ABI abstraction layer.
Sebastian Redl75555032009-01-24 21:16:55 +0000415 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType();
416 unsigned AS = Pointee.getAddressSpace();
417 Width = Target.getPointerWidth(AS);
418 if (Pointee->isFunctionType())
419 Width *= 2;
420 Align = Target.getPointerAlign(AS);
421 // GCC aligns at single pointer width.
422 }
Chris Lattner4b009652007-07-25 00:24:17 +0000423 case Type::Complex: {
424 // Complex types have the same alignment as their elements, but twice the
425 // size.
426 std::pair<uint64_t, unsigned> EltInfo =
Chris Lattner8cd0e932008-03-05 18:54:05 +0000427 getTypeInfo(cast<ComplexType>(T)->getElementType());
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000428 Width = EltInfo.first*2;
Chris Lattner4b009652007-07-25 00:24:17 +0000429 Align = EltInfo.second;
430 break;
431 }
Devang Patel4b6bf702008-06-04 21:54:36 +0000432 case Type::ObjCInterface: {
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000433 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T);
Devang Patel4b6bf702008-06-04 21:54:36 +0000434 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl());
435 Width = Layout.getSize();
436 Align = Layout.getAlignment();
437 break;
438 }
Chris Lattner2bf1d6c2008-04-06 22:05:18 +0000439 case Type::Tagged: {
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000440 const TagType *TT = cast<TagType>(T);
441
442 if (TT->getDecl()->isInvalidDecl()) {
Chris Lattnerfd799692008-08-09 21:35:13 +0000443 Width = 1;
444 Align = 1;
445 break;
446 }
447
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000448 if (const EnumType *ET = dyn_cast<EnumType>(TT))
Chris Lattner2bf1d6c2008-04-06 22:05:18 +0000449 return getTypeInfo(ET->getDecl()->getIntegerType());
450
Daniel Dunbar7d6a5d22008-11-08 05:48:37 +0000451 const RecordType *RT = cast<RecordType>(TT);
Chris Lattner2bf1d6c2008-04-06 22:05:18 +0000452 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl());
453 Width = Layout.getSize();
454 Align = Layout.getAlignment();
Chris Lattner4b009652007-07-25 00:24:17 +0000455 break;
456 }
Chris Lattner2bf1d6c2008-04-06 22:05:18 +0000457 }
Chris Lattner4b009652007-07-25 00:24:17 +0000458
459 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2");
Chris Lattnerfc18dcc2008-03-08 08:52:55 +0000460 return std::make_pair(Width, Align);
Chris Lattner4b009652007-07-25 00:24:17 +0000461}
462
Chris Lattner83165b52009-01-27 18:08:34 +0000463/// getPreferredTypeAlign - Return the "preferred" alignment of the specified
464/// type for the current target in bits. This can be different than the ABI
465/// alignment in cases where it is beneficial for performance to overalign
466/// a data type.
467unsigned ASTContext::getPreferredTypeAlign(const Type *T) {
468 unsigned ABIAlign = getTypeAlign(T);
469
470 // Doubles should be naturally aligned if possible.
471 if (const BuiltinType *BT = dyn_cast<BuiltinType>(getCanonicalType(T)))
472 if (BT->getKind() == BuiltinType::Double)
Fariborz Jahanianbaeeb752009-01-27 18:55:00 +0000473 return std::max(ABIAlign, 64U);
Chris Lattner83165b52009-01-27 18:08:34 +0000474
475 return ABIAlign;
476}
477
478
Devang Patelbfe323c2008-06-04 21:22:16 +0000479/// LayoutField - Field layout.
480void ASTRecordLayout::LayoutField(const FieldDecl *FD, unsigned FieldNo,
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000481 bool IsUnion, unsigned StructPacking,
Devang Patelbfe323c2008-06-04 21:22:16 +0000482 ASTContext &Context) {
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000483 unsigned FieldPacking = StructPacking;
Devang Patelbfe323c2008-06-04 21:22:16 +0000484 uint64_t FieldOffset = IsUnion ? 0 : Size;
485 uint64_t FieldSize;
486 unsigned FieldAlign;
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000487
488 // FIXME: Should this override struct packing? Probably we want to
489 // take the minimum?
490 if (const PackedAttr *PA = FD->getAttr<PackedAttr>())
491 FieldPacking = PA->getAlignment();
Devang Patelbfe323c2008-06-04 21:22:16 +0000492
493 if (const Expr *BitWidthExpr = FD->getBitWidth()) {
494 // TODO: Need to check this algorithm on other targets!
495 // (tested on Linux-X86)
Daniel Dunbar7cbcbf42008-08-13 23:47:13 +0000496 FieldSize =
497 BitWidthExpr->getIntegerConstantExprValue(Context).getZExtValue();
Devang Patelbfe323c2008-06-04 21:22:16 +0000498
499 std::pair<uint64_t, unsigned> FieldInfo =
500 Context.getTypeInfo(FD->getType());
501 uint64_t TypeSize = FieldInfo.first;
502
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000503 // Determine the alignment of this bitfield. The packing
504 // attributes define a maximum and the alignment attribute defines
505 // a minimum.
506 // FIXME: What is the right behavior when the specified alignment
507 // is smaller than the specified packing?
Devang Patelbfe323c2008-06-04 21:22:16 +0000508 FieldAlign = FieldInfo.second;
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000509 if (FieldPacking)
510 FieldAlign = std::min(FieldAlign, FieldPacking);
Devang Patelbfe323c2008-06-04 21:22:16 +0000511 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>())
512 FieldAlign = std::max(FieldAlign, AA->getAlignment());
513
514 // Check if we need to add padding to give the field the correct
515 // alignment.
516 if (FieldSize == 0 || (FieldOffset & (FieldAlign-1)) + FieldSize > TypeSize)
517 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1);
518
519 // Padding members don't affect overall alignment
520 if (!FD->getIdentifier())
521 FieldAlign = 1;
522 } else {
Chris Lattnerfd799692008-08-09 21:35:13 +0000523 if (FD->getType()->isIncompleteArrayType()) {
524 // This is a flexible array member; we can't directly
Devang Patelbfe323c2008-06-04 21:22:16 +0000525 // query getTypeInfo about these, so we figure it out here.
526 // Flexible array members don't have any size, but they
527 // have to be aligned appropriately for their element type.
528 FieldSize = 0;
Chris Lattnera1923f62008-08-04 07:31:14 +0000529 const ArrayType* ATy = Context.getAsArrayType(FD->getType());
Devang Patelbfe323c2008-06-04 21:22:16 +0000530 FieldAlign = Context.getTypeAlign(ATy->getElementType());
531 } else {
532 std::pair<uint64_t, unsigned> FieldInfo =
533 Context.getTypeInfo(FD->getType());
534 FieldSize = FieldInfo.first;
535 FieldAlign = FieldInfo.second;
536 }
537
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000538 // Determine the alignment of this bitfield. The packing
539 // attributes define a maximum and the alignment attribute defines
540 // a minimum. Additionally, the packing alignment must be at least
541 // a byte for non-bitfields.
542 //
543 // FIXME: What is the right behavior when the specified alignment
544 // is smaller than the specified packing?
545 if (FieldPacking)
546 FieldAlign = std::min(FieldAlign, std::max(8U, FieldPacking));
Devang Patelbfe323c2008-06-04 21:22:16 +0000547 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>())
548 FieldAlign = std::max(FieldAlign, AA->getAlignment());
549
550 // Round up the current record size to the field's alignment boundary.
551 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1);
552 }
553
554 // Place this field at the current location.
555 FieldOffsets[FieldNo] = FieldOffset;
556
557 // Reserve space for this field.
558 if (IsUnion) {
559 Size = std::max(Size, FieldSize);
560 } else {
561 Size = FieldOffset + FieldSize;
562 }
563
564 // Remember max struct/class alignment.
565 Alignment = std::max(Alignment, FieldAlign);
566}
567
Fariborz Jahanian0556b152008-12-17 21:40:49 +0000568static void CollectObjCIvars(const ObjCInterfaceDecl *OI,
569 std::vector<FieldDecl*> &Fields) {
570 const ObjCInterfaceDecl *SuperClass = OI->getSuperClass();
571 if (SuperClass)
572 CollectObjCIvars(SuperClass, Fields);
573 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(),
574 E = OI->ivar_end(); I != E; ++I) {
575 ObjCIvarDecl *IVDecl = (*I);
576 if (!IVDecl->isInvalidDecl())
577 Fields.push_back(cast<FieldDecl>(IVDecl));
578 }
579}
580
581/// addRecordToClass - produces record info. for the class for its
582/// ivars and all those inherited.
583///
584const RecordDecl *ASTContext::addRecordToClass(const ObjCInterfaceDecl *D)
585{
586 const RecordDecl *&RD = ASTRecordForInterface[D];
587 if (RD)
588 return RD;
589 std::vector<FieldDecl*> RecFields;
590 CollectObjCIvars(D, RecFields);
591 RecordDecl *NewRD = RecordDecl::Create(*this, TagDecl::TK_struct, 0,
592 D->getLocation(),
593 D->getIdentifier());
594 /// FIXME! Can do collection of ivars and adding to the record while
595 /// doing it.
596 for (unsigned int i = 0; i != RecFields.size(); i++) {
597 FieldDecl *Field = FieldDecl::Create(*this, NewRD,
598 RecFields[i]->getLocation(),
599 RecFields[i]->getIdentifier(),
600 RecFields[i]->getType(),
Douglas Gregoraf8ad2b2009-01-20 01:17:11 +0000601 RecFields[i]->getBitWidth(), false);
Douglas Gregor03b2ad22009-01-12 23:27:07 +0000602 NewRD->addDecl(Field);
Fariborz Jahanian0556b152008-12-17 21:40:49 +0000603 }
604 NewRD->completeDefinition(*this);
605 RD = NewRD;
606 return RD;
607}
Devang Patel4b6bf702008-06-04 21:54:36 +0000608
Fariborz Jahanianea944842008-12-18 17:29:46 +0000609/// setFieldDecl - maps a field for the given Ivar reference node.
610//
611void ASTContext::setFieldDecl(const ObjCInterfaceDecl *OI,
612 const ObjCIvarDecl *Ivar,
613 const ObjCIvarRefExpr *MRef) {
614 FieldDecl *FD = (const_cast<ObjCInterfaceDecl *>(OI))->
615 lookupFieldDeclForIvar(*this, Ivar);
616 ASTFieldForIvarRef[MRef] = FD;
617}
618
Chris Lattner2fda0ed2008-10-05 17:34:18 +0000619/// getASTObjcInterfaceLayout - Get or compute information about the layout of
620/// the specified Objective C, which indicates its size and ivar
Devang Patel4b6bf702008-06-04 21:54:36 +0000621/// position information.
622const ASTRecordLayout &
623ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) {
624 // Look up this layout, if already laid out, return what we have.
625 const ASTRecordLayout *&Entry = ASTObjCInterfaces[D];
626 if (Entry) return *Entry;
627
628 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can
629 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into.
Devang Patel8682d882008-06-06 02:14:01 +0000630 ASTRecordLayout *NewEntry = NULL;
631 unsigned FieldCount = D->ivar_size();
632 if (ObjCInterfaceDecl *SD = D->getSuperClass()) {
633 FieldCount++;
634 const ASTRecordLayout &SL = getASTObjCInterfaceLayout(SD);
635 unsigned Alignment = SL.getAlignment();
636 uint64_t Size = SL.getSize();
637 NewEntry = new ASTRecordLayout(Size, Alignment);
638 NewEntry->InitializeLayout(FieldCount);
Chris Lattner2fda0ed2008-10-05 17:34:18 +0000639 // Super class is at the beginning of the layout.
640 NewEntry->SetFieldOffset(0, 0);
Devang Patel8682d882008-06-06 02:14:01 +0000641 } else {
642 NewEntry = new ASTRecordLayout();
643 NewEntry->InitializeLayout(FieldCount);
644 }
Devang Patel4b6bf702008-06-04 21:54:36 +0000645 Entry = NewEntry;
646
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000647 unsigned StructPacking = 0;
648 if (const PackedAttr *PA = D->getAttr<PackedAttr>())
649 StructPacking = PA->getAlignment();
Devang Patel4b6bf702008-06-04 21:54:36 +0000650
651 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
652 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(),
653 AA->getAlignment()));
654
655 // Layout each ivar sequentially.
656 unsigned i = 0;
657 for (ObjCInterfaceDecl::ivar_iterator IVI = D->ivar_begin(),
658 IVE = D->ivar_end(); IVI != IVE; ++IVI) {
659 const ObjCIvarDecl* Ivar = (*IVI);
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000660 NewEntry->LayoutField(Ivar, i++, false, StructPacking, *this);
Devang Patel4b6bf702008-06-04 21:54:36 +0000661 }
662
663 // Finally, round the size of the total struct up to the alignment of the
664 // struct itself.
665 NewEntry->FinalizeLayout();
666 return *NewEntry;
667}
668
Devang Patel7a78e432007-11-01 19:11:01 +0000669/// getASTRecordLayout - Get or compute information about the layout of the
Chris Lattner4b009652007-07-25 00:24:17 +0000670/// specified record (struct/union/class), which indicates its size and field
671/// position information.
Chris Lattner8cd0e932008-03-05 18:54:05 +0000672const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) {
Ted Kremenek46a837c2008-09-05 17:16:31 +0000673 D = D->getDefinition(*this);
674 assert(D && "Cannot get layout of forward declarations!");
Eli Friedman5949a022008-05-30 09:31:38 +0000675
Chris Lattner4b009652007-07-25 00:24:17 +0000676 // Look up this layout, if already laid out, return what we have.
Devang Patel7a78e432007-11-01 19:11:01 +0000677 const ASTRecordLayout *&Entry = ASTRecordLayouts[D];
Chris Lattner4b009652007-07-25 00:24:17 +0000678 if (Entry) return *Entry;
Eli Friedman5949a022008-05-30 09:31:38 +0000679
Devang Patel7a78e432007-11-01 19:11:01 +0000680 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can
681 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into.
682 ASTRecordLayout *NewEntry = new ASTRecordLayout();
Chris Lattner4b009652007-07-25 00:24:17 +0000683 Entry = NewEntry;
Eli Friedman5949a022008-05-30 09:31:38 +0000684
Douglas Gregor39677622008-12-11 20:41:00 +0000685 // FIXME: Avoid linear walk through the fields, if possible.
Douglas Gregor8acb7272008-12-11 16:49:14 +0000686 NewEntry->InitializeLayout(std::distance(D->field_begin(), D->field_end()));
Argiris Kirtzidisc6cc7d52008-06-09 23:19:58 +0000687 bool IsUnion = D->isUnion();
Chris Lattner4b009652007-07-25 00:24:17 +0000688
Daniel Dunbar2cb762f2008-10-16 02:34:03 +0000689 unsigned StructPacking = 0;
690 if (const PackedAttr *PA = D->getAttr<PackedAttr>())
691 StructPacking = PA->getAlignment();
692
Eli Friedman5949a022008-05-30 09:31:38 +0000693 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
Devang Patelbfe323c2008-06-04 21:22:16 +0000694 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(),
695 AA->getAlignment()));
Anders Carlsson058237f2008-02-18 07:13:09 +0000696
Eli Friedman5949a022008-05-30 09:31:38 +0000697 // Layout each field, for now, just sequentially, respecting alignment. In
698 // the future, this will need to be tweakable by targets.
Douglas Gregor8acb7272008-12-11 16:49:14 +0000699 unsigned FieldIdx = 0;
Douglas Gregor5d764842009-01-09 17:18:27 +0000700 for (RecordDecl::field_iterator Field = D->field_begin(),
701 FieldEnd = D->field_end();
Douglas Gregor8acb7272008-12-11 16:49:14 +0000702 Field != FieldEnd; (void)++Field, ++FieldIdx)
703 NewEntry->LayoutField(*Field, FieldIdx, IsUnion, StructPacking, *this);
Eli Friedman5949a022008-05-30 09:31:38 +0000704
705 // Finally, round the size of the total struct up to the alignment of the
706 // struct itself.
Devang Patelbfe323c2008-06-04 21:22:16 +0000707 NewEntry->FinalizeLayout();
Chris Lattner4b009652007-07-25 00:24:17 +0000708 return *NewEntry;
709}
710
Chris Lattner4b009652007-07-25 00:24:17 +0000711//===----------------------------------------------------------------------===//
712// Type creation/memoization methods
713//===----------------------------------------------------------------------===//
714
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000715QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000716 QualType CanT = getCanonicalType(T);
717 if (CanT.getAddressSpace() == AddressSpace)
Chris Lattner35fef522008-02-20 20:55:12 +0000718 return T;
719
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000720 // Type's cannot have multiple ExtQuals, therefore we know we only have to deal
Chris Lattner35fef522008-02-20 20:55:12 +0000721 // with CVR qualifiers from here on out.
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000722 assert(CanT.getAddressSpace() == 0 &&
Chris Lattner35fef522008-02-20 20:55:12 +0000723 "Type is already address space qualified");
724
725 // Check if we've already instantiated an address space qual'd type of this
726 // type.
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000727 llvm::FoldingSetNodeID ID;
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000728 ExtQualType::Profile(ID, T.getTypePtr(), AddressSpace);
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000729 void *InsertPos = 0;
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000730 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos))
731 return QualType(EXTQy, 0);
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000732
733 // If the base type isn't canonical, this won't be a canonical type either,
734 // so fill in the canonical type field.
735 QualType Canonical;
736 if (!T->isCanonical()) {
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000737 Canonical = getAddrSpaceQualType(CanT, AddressSpace);
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000738
739 // Get the new insert position for the node we care about.
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000740 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000741 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000742 }
Fariborz Jahanianb60352a2009-02-17 18:27:45 +0000743 ExtQualType *New = new (*this, 8) ExtQualType(T.getTypePtr(), Canonical,
744 AddressSpace);
745 ExtQualTypes.InsertNode(New, InsertPos);
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000746 Types.push_back(New);
Chris Lattner35fef522008-02-20 20:55:12 +0000747 return QualType(New, T.getCVRQualifiers());
Christopher Lamb2a72bb32008-02-04 02:31:56 +0000748}
749
Chris Lattner4b009652007-07-25 00:24:17 +0000750
751/// getComplexType - Return the uniqued reference to the type for a complex
752/// number with the specified element type.
753QualType ASTContext::getComplexType(QualType T) {
754 // Unique pointers, to guarantee there is only one pointer of a particular
755 // structure.
756 llvm::FoldingSetNodeID ID;
757 ComplexType::Profile(ID, T);
758
759 void *InsertPos = 0;
760 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos))
761 return QualType(CT, 0);
762
763 // If the pointee type isn't canonical, this won't be a canonical type either,
764 // so fill in the canonical type field.
765 QualType Canonical;
766 if (!T->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000767 Canonical = getComplexType(getCanonicalType(T));
Chris Lattner4b009652007-07-25 00:24:17 +0000768
769 // Get the new insert position for the node we care about.
770 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000771 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +0000772 }
Steve Naroff93fd2112009-01-27 22:08:43 +0000773 ComplexType *New = new (*this,8) ComplexType(T, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +0000774 Types.push_back(New);
775 ComplexTypes.InsertNode(New, InsertPos);
776 return QualType(New, 0);
777}
778
Eli Friedmanff3fcdf2009-02-13 02:31:07 +0000779QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) {
780 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ?
781 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes;
782 FixedWidthIntType *&Entry = Map[Width];
783 if (!Entry)
784 Entry = new FixedWidthIntType(Width, Signed);
785 return QualType(Entry, 0);
786}
Chris Lattner4b009652007-07-25 00:24:17 +0000787
788/// getPointerType - Return the uniqued reference to the type for a pointer to
789/// the specified type.
790QualType ASTContext::getPointerType(QualType T) {
791 // Unique pointers, to guarantee there is only one pointer of a particular
792 // structure.
793 llvm::FoldingSetNodeID ID;
794 PointerType::Profile(ID, T);
795
796 void *InsertPos = 0;
797 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos))
798 return QualType(PT, 0);
799
800 // If the pointee type isn't canonical, this won't be a canonical type either,
801 // so fill in the canonical type field.
802 QualType Canonical;
803 if (!T->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000804 Canonical = getPointerType(getCanonicalType(T));
Chris Lattner4b009652007-07-25 00:24:17 +0000805
806 // Get the new insert position for the node we care about.
807 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000808 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +0000809 }
Steve Naroff93fd2112009-01-27 22:08:43 +0000810 PointerType *New = new (*this,8) PointerType(T, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +0000811 Types.push_back(New);
812 PointerTypes.InsertNode(New, InsertPos);
813 return QualType(New, 0);
814}
815
Steve Naroff7aa54752008-08-27 16:04:49 +0000816/// getBlockPointerType - Return the uniqued reference to the type for
817/// a pointer to the specified block.
818QualType ASTContext::getBlockPointerType(QualType T) {
Steve Narofffd5b19d2008-08-28 19:20:44 +0000819 assert(T->isFunctionType() && "block of function types only");
820 // Unique pointers, to guarantee there is only one block of a particular
Steve Naroff7aa54752008-08-27 16:04:49 +0000821 // structure.
822 llvm::FoldingSetNodeID ID;
823 BlockPointerType::Profile(ID, T);
824
825 void *InsertPos = 0;
826 if (BlockPointerType *PT =
827 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
828 return QualType(PT, 0);
829
Steve Narofffd5b19d2008-08-28 19:20:44 +0000830 // If the block pointee type isn't canonical, this won't be a canonical
Steve Naroff7aa54752008-08-27 16:04:49 +0000831 // type either so fill in the canonical type field.
832 QualType Canonical;
833 if (!T->isCanonical()) {
834 Canonical = getBlockPointerType(getCanonicalType(T));
835
836 // Get the new insert position for the node we care about.
837 BlockPointerType *NewIP =
838 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000839 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Steve Naroff7aa54752008-08-27 16:04:49 +0000840 }
Steve Naroff93fd2112009-01-27 22:08:43 +0000841 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical);
Steve Naroff7aa54752008-08-27 16:04:49 +0000842 Types.push_back(New);
843 BlockPointerTypes.InsertNode(New, InsertPos);
844 return QualType(New, 0);
845}
846
Chris Lattner4b009652007-07-25 00:24:17 +0000847/// getReferenceType - Return the uniqued reference to the type for a reference
848/// to the specified type.
849QualType ASTContext::getReferenceType(QualType T) {
850 // Unique pointers, to guarantee there is only one pointer of a particular
851 // structure.
852 llvm::FoldingSetNodeID ID;
853 ReferenceType::Profile(ID, T);
854
855 void *InsertPos = 0;
856 if (ReferenceType *RT = ReferenceTypes.FindNodeOrInsertPos(ID, InsertPos))
857 return QualType(RT, 0);
858
859 // If the referencee type isn't canonical, this won't be a canonical type
860 // either, so fill in the canonical type field.
861 QualType Canonical;
862 if (!T->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000863 Canonical = getReferenceType(getCanonicalType(T));
Chris Lattner4b009652007-07-25 00:24:17 +0000864
865 // Get the new insert position for the node we care about.
866 ReferenceType *NewIP = ReferenceTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000867 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +0000868 }
869
Steve Naroff93fd2112009-01-27 22:08:43 +0000870 ReferenceType *New = new (*this,8) ReferenceType(T, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +0000871 Types.push_back(New);
872 ReferenceTypes.InsertNode(New, InsertPos);
873 return QualType(New, 0);
874}
875
Sebastian Redl75555032009-01-24 21:16:55 +0000876/// getMemberPointerType - Return the uniqued reference to the type for a
877/// member pointer to the specified type, in the specified class.
878QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls)
879{
880 // Unique pointers, to guarantee there is only one pointer of a particular
881 // structure.
882 llvm::FoldingSetNodeID ID;
883 MemberPointerType::Profile(ID, T, Cls);
884
885 void *InsertPos = 0;
886 if (MemberPointerType *PT =
887 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
888 return QualType(PT, 0);
889
890 // If the pointee or class type isn't canonical, this won't be a canonical
891 // type either, so fill in the canonical type field.
892 QualType Canonical;
893 if (!T->isCanonical()) {
894 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls));
895
896 // Get the new insert position for the node we care about.
897 MemberPointerType *NewIP =
898 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos);
899 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
900 }
Steve Naroff93fd2112009-01-27 22:08:43 +0000901 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical);
Sebastian Redl75555032009-01-24 21:16:55 +0000902 Types.push_back(New);
903 MemberPointerTypes.InsertNode(New, InsertPos);
904 return QualType(New, 0);
905}
906
Steve Naroff83c13012007-08-30 01:06:46 +0000907/// getConstantArrayType - Return the unique reference to the type for an
908/// array of the specified element type.
909QualType ASTContext::getConstantArrayType(QualType EltTy,
Steve Naroff24c9b982007-08-30 18:10:14 +0000910 const llvm::APInt &ArySize,
911 ArrayType::ArraySizeModifier ASM,
912 unsigned EltTypeQuals) {
Chris Lattner4b009652007-07-25 00:24:17 +0000913 llvm::FoldingSetNodeID ID;
Steve Naroff83c13012007-08-30 01:06:46 +0000914 ConstantArrayType::Profile(ID, EltTy, ArySize);
Chris Lattner4b009652007-07-25 00:24:17 +0000915
916 void *InsertPos = 0;
Ted Kremenek738e6c02007-10-31 17:10:13 +0000917 if (ConstantArrayType *ATP =
918 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos))
Chris Lattner4b009652007-07-25 00:24:17 +0000919 return QualType(ATP, 0);
920
921 // If the element type isn't canonical, this won't be a canonical type either,
922 // so fill in the canonical type field.
923 QualType Canonical;
924 if (!EltTy->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000925 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize,
Steve Naroff24c9b982007-08-30 18:10:14 +0000926 ASM, EltTypeQuals);
Chris Lattner4b009652007-07-25 00:24:17 +0000927 // Get the new insert position for the node we care about.
Ted Kremenek738e6c02007-10-31 17:10:13 +0000928 ConstantArrayType *NewIP =
929 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +0000930 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +0000931 }
932
Ted Kremenekc70e7d02009-01-19 21:31:22 +0000933 ConstantArrayType *New =
Steve Naroff93fd2112009-01-27 22:08:43 +0000934 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals);
Ted Kremenek738e6c02007-10-31 17:10:13 +0000935 ConstantArrayTypes.InsertNode(New, InsertPos);
Chris Lattner4b009652007-07-25 00:24:17 +0000936 Types.push_back(New);
937 return QualType(New, 0);
938}
939
Steve Naroffe2579e32007-08-30 18:14:25 +0000940/// getVariableArrayType - Returns a non-unique reference to the type for a
941/// variable array of the specified element type.
Steve Naroff24c9b982007-08-30 18:10:14 +0000942QualType ASTContext::getVariableArrayType(QualType EltTy, Expr *NumElts,
943 ArrayType::ArraySizeModifier ASM,
944 unsigned EltTypeQuals) {
Eli Friedman8ff07782008-02-15 18:16:39 +0000945 // Since we don't unique expressions, it isn't possible to unique VLA's
946 // that have an expression provided for their size.
947
Ted Kremenekc70e7d02009-01-19 21:31:22 +0000948 VariableArrayType *New =
Steve Naroff93fd2112009-01-27 22:08:43 +0000949 new(*this,8)VariableArrayType(EltTy,QualType(), NumElts, ASM, EltTypeQuals);
Eli Friedman8ff07782008-02-15 18:16:39 +0000950
951 VariableArrayTypes.push_back(New);
952 Types.push_back(New);
953 return QualType(New, 0);
954}
955
Douglas Gregor1b21c7f2008-12-05 23:32:09 +0000956/// getDependentSizedArrayType - Returns a non-unique reference to
957/// the type for a dependently-sized array of the specified element
958/// type. FIXME: We will need these to be uniqued, or at least
959/// comparable, at some point.
960QualType ASTContext::getDependentSizedArrayType(QualType EltTy, Expr *NumElts,
961 ArrayType::ArraySizeModifier ASM,
962 unsigned EltTypeQuals) {
963 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) &&
964 "Size must be type- or value-dependent!");
965
966 // Since we don't unique expressions, it isn't possible to unique
967 // dependently-sized array types.
968
Ted Kremenekc70e7d02009-01-19 21:31:22 +0000969 DependentSizedArrayType *New =
Steve Naroff93fd2112009-01-27 22:08:43 +0000970 new (*this,8) DependentSizedArrayType(EltTy, QualType(), NumElts,
971 ASM, EltTypeQuals);
Douglas Gregor1b21c7f2008-12-05 23:32:09 +0000972
973 DependentSizedArrayTypes.push_back(New);
974 Types.push_back(New);
975 return QualType(New, 0);
976}
977
Eli Friedman8ff07782008-02-15 18:16:39 +0000978QualType ASTContext::getIncompleteArrayType(QualType EltTy,
979 ArrayType::ArraySizeModifier ASM,
980 unsigned EltTypeQuals) {
981 llvm::FoldingSetNodeID ID;
982 IncompleteArrayType::Profile(ID, EltTy);
983
984 void *InsertPos = 0;
985 if (IncompleteArrayType *ATP =
986 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos))
987 return QualType(ATP, 0);
988
989 // If the element type isn't canonical, this won't be a canonical type
990 // either, so fill in the canonical type field.
991 QualType Canonical;
992
993 if (!EltTy->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +0000994 Canonical = getIncompleteArrayType(getCanonicalType(EltTy),
Ted Kremenek3793e1a2007-10-29 23:37:31 +0000995 ASM, EltTypeQuals);
Eli Friedman8ff07782008-02-15 18:16:39 +0000996
997 // Get the new insert position for the node we care about.
998 IncompleteArrayType *NewIP =
999 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +00001000 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Ted Kremenek3793e1a2007-10-29 23:37:31 +00001001 }
Eli Friedman8ff07782008-02-15 18:16:39 +00001002
Steve Naroff93fd2112009-01-27 22:08:43 +00001003 IncompleteArrayType *New = new (*this,8) IncompleteArrayType(EltTy, Canonical,
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001004 ASM, EltTypeQuals);
Eli Friedman8ff07782008-02-15 18:16:39 +00001005
1006 IncompleteArrayTypes.InsertNode(New, InsertPos);
1007 Types.push_back(New);
1008 return QualType(New, 0);
Steve Naroff83c13012007-08-30 01:06:46 +00001009}
1010
Chris Lattner4b009652007-07-25 00:24:17 +00001011/// getVectorType - Return the unique reference to a vector type of
1012/// the specified element type and size. VectorType must be a built-in type.
1013QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) {
1014 BuiltinType *baseType;
1015
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001016 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr());
Chris Lattner4b009652007-07-25 00:24:17 +00001017 assert(baseType != 0 && "getVectorType(): Expecting a built-in type");
1018
1019 // Check if we've already instantiated a vector of this type.
1020 llvm::FoldingSetNodeID ID;
1021 VectorType::Profile(ID, vecType, NumElts, Type::Vector);
1022 void *InsertPos = 0;
1023 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos))
1024 return QualType(VTP, 0);
1025
1026 // If the element type isn't canonical, this won't be a canonical type either,
1027 // so fill in the canonical type field.
1028 QualType Canonical;
1029 if (!vecType->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001030 Canonical = getVectorType(getCanonicalType(vecType), NumElts);
Chris Lattner4b009652007-07-25 00:24:17 +00001031
1032 // Get the new insert position for the node we care about.
1033 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +00001034 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +00001035 }
Steve Naroff93fd2112009-01-27 22:08:43 +00001036 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +00001037 VectorTypes.InsertNode(New, InsertPos);
1038 Types.push_back(New);
1039 return QualType(New, 0);
1040}
1041
Nate Begemanaf6ed502008-04-18 23:10:10 +00001042/// getExtVectorType - Return the unique reference to an extended vector type of
Chris Lattner4b009652007-07-25 00:24:17 +00001043/// the specified element type and size. VectorType must be a built-in type.
Nate Begemanaf6ed502008-04-18 23:10:10 +00001044QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) {
Chris Lattner4b009652007-07-25 00:24:17 +00001045 BuiltinType *baseType;
1046
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001047 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr());
Nate Begemanaf6ed502008-04-18 23:10:10 +00001048 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type");
Chris Lattner4b009652007-07-25 00:24:17 +00001049
1050 // Check if we've already instantiated a vector of this type.
1051 llvm::FoldingSetNodeID ID;
Nate Begemanaf6ed502008-04-18 23:10:10 +00001052 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector);
Chris Lattner4b009652007-07-25 00:24:17 +00001053 void *InsertPos = 0;
1054 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos))
1055 return QualType(VTP, 0);
1056
1057 // If the element type isn't canonical, this won't be a canonical type either,
1058 // so fill in the canonical type field.
1059 QualType Canonical;
1060 if (!vecType->isCanonical()) {
Nate Begemanaf6ed502008-04-18 23:10:10 +00001061 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts);
Chris Lattner4b009652007-07-25 00:24:17 +00001062
1063 // Get the new insert position for the node we care about.
1064 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +00001065 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +00001066 }
Steve Naroff93fd2112009-01-27 22:08:43 +00001067 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +00001068 VectorTypes.InsertNode(New, InsertPos);
1069 Types.push_back(New);
1070 return QualType(New, 0);
1071}
1072
1073/// getFunctionTypeNoProto - Return a K&R style C function type like 'int()'.
1074///
1075QualType ASTContext::getFunctionTypeNoProto(QualType ResultTy) {
1076 // Unique functions, to guarantee there is only one function of a particular
1077 // structure.
1078 llvm::FoldingSetNodeID ID;
1079 FunctionTypeNoProto::Profile(ID, ResultTy);
1080
1081 void *InsertPos = 0;
1082 if (FunctionTypeNoProto *FT =
1083 FunctionTypeNoProtos.FindNodeOrInsertPos(ID, InsertPos))
1084 return QualType(FT, 0);
1085
1086 QualType Canonical;
1087 if (!ResultTy->isCanonical()) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001088 Canonical = getFunctionTypeNoProto(getCanonicalType(ResultTy));
Chris Lattner4b009652007-07-25 00:24:17 +00001089
1090 // Get the new insert position for the node we care about.
1091 FunctionTypeNoProto *NewIP =
1092 FunctionTypeNoProtos.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +00001093 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +00001094 }
1095
Steve Naroff93fd2112009-01-27 22:08:43 +00001096 FunctionTypeNoProto *New =new(*this,8)FunctionTypeNoProto(ResultTy,Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +00001097 Types.push_back(New);
Eli Friedmanaa0fdfd2008-02-25 22:11:40 +00001098 FunctionTypeNoProtos.InsertNode(New, InsertPos);
Chris Lattner4b009652007-07-25 00:24:17 +00001099 return QualType(New, 0);
1100}
1101
1102/// getFunctionType - Return a normal function type with a typed argument
1103/// list. isVariadic indicates whether the argument list includes '...'.
Chris Lattner2fda0ed2008-10-05 17:34:18 +00001104QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray,
Argiris Kirtzidis4b269b42008-10-24 21:46:40 +00001105 unsigned NumArgs, bool isVariadic,
1106 unsigned TypeQuals) {
Chris Lattner4b009652007-07-25 00:24:17 +00001107 // Unique functions, to guarantee there is only one function of a particular
1108 // structure.
1109 llvm::FoldingSetNodeID ID;
Argiris Kirtzidis4b269b42008-10-24 21:46:40 +00001110 FunctionTypeProto::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic,
1111 TypeQuals);
Chris Lattner4b009652007-07-25 00:24:17 +00001112
1113 void *InsertPos = 0;
1114 if (FunctionTypeProto *FTP =
1115 FunctionTypeProtos.FindNodeOrInsertPos(ID, InsertPos))
1116 return QualType(FTP, 0);
1117
1118 // Determine whether the type being created is already canonical or not.
1119 bool isCanonical = ResultTy->isCanonical();
1120 for (unsigned i = 0; i != NumArgs && isCanonical; ++i)
1121 if (!ArgArray[i]->isCanonical())
1122 isCanonical = false;
1123
1124 // If this type isn't canonical, get the canonical version of it.
1125 QualType Canonical;
1126 if (!isCanonical) {
1127 llvm::SmallVector<QualType, 16> CanonicalArgs;
1128 CanonicalArgs.reserve(NumArgs);
1129 for (unsigned i = 0; i != NumArgs; ++i)
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001130 CanonicalArgs.push_back(getCanonicalType(ArgArray[i]));
Chris Lattner4b009652007-07-25 00:24:17 +00001131
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001132 Canonical = getFunctionType(getCanonicalType(ResultTy),
Chris Lattner4b009652007-07-25 00:24:17 +00001133 &CanonicalArgs[0], NumArgs,
Argiris Kirtzidis65b99642008-10-26 16:43:14 +00001134 isVariadic, TypeQuals);
Chris Lattner4b009652007-07-25 00:24:17 +00001135
1136 // Get the new insert position for the node we care about.
1137 FunctionTypeProto *NewIP =
1138 FunctionTypeProtos.FindNodeOrInsertPos(ID, InsertPos);
Chris Lattner578a37e2008-10-12 00:26:57 +00001139 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP;
Chris Lattner4b009652007-07-25 00:24:17 +00001140 }
1141
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001142 // FunctionTypeProto objects are allocated with extra bytes after them
1143 // for a variable size array (for parameter types) at the end of them.
Chris Lattner4b009652007-07-25 00:24:17 +00001144 FunctionTypeProto *FTP =
Steve Naroff207b9ec2009-01-27 23:20:32 +00001145 (FunctionTypeProto*)Allocate(sizeof(FunctionTypeProto) +
1146 NumArgs*sizeof(QualType), 8);
Chris Lattner4b009652007-07-25 00:24:17 +00001147 new (FTP) FunctionTypeProto(ResultTy, ArgArray, NumArgs, isVariadic,
Argiris Kirtzidis4b269b42008-10-24 21:46:40 +00001148 TypeQuals, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +00001149 Types.push_back(FTP);
1150 FunctionTypeProtos.InsertNode(FTP, InsertPos);
1151 return QualType(FTP, 0);
1152}
1153
Douglas Gregor1d661552008-04-13 21:07:44 +00001154/// getTypeDeclType - Return the unique reference to the type for the
1155/// specified type declaration.
Ted Kremenek46a837c2008-09-05 17:16:31 +00001156QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) {
Argiris Kirtzidiseeec5482008-10-16 16:50:47 +00001157 assert(Decl && "Passed null for Decl param");
Douglas Gregor1d661552008-04-13 21:07:44 +00001158 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
1159
Argiris Kirtzidiseeec5482008-10-16 16:50:47 +00001160 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl))
Douglas Gregor1d661552008-04-13 21:07:44 +00001161 return getTypedefType(Typedef);
Douglas Gregora4918772009-02-05 23:33:38 +00001162 else if (isa<TemplateTypeParmDecl>(Decl)) {
1163 assert(false && "Template type parameter types are always available.");
1164 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl))
Douglas Gregor1d661552008-04-13 21:07:44 +00001165 return getObjCInterfaceType(ObjCInterface);
Argiris Kirtzidisea29d1e2008-08-07 20:55:28 +00001166
Argiris Kirtzidiseeec5482008-10-16 16:50:47 +00001167 if (CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(Decl)) {
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001168 if (PrevDecl)
1169 Decl->TypeForDecl = PrevDecl->TypeForDecl;
Steve Naroff93fd2112009-01-27 22:08:43 +00001170 else
1171 Decl->TypeForDecl = new (*this,8) CXXRecordType(CXXRecord);
Ted Kremenek46a837c2008-09-05 17:16:31 +00001172 }
Argiris Kirtzidiseeec5482008-10-16 16:50:47 +00001173 else if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) {
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001174 if (PrevDecl)
1175 Decl->TypeForDecl = PrevDecl->TypeForDecl;
Steve Naroff93fd2112009-01-27 22:08:43 +00001176 else
1177 Decl->TypeForDecl = new (*this,8) RecordType(Record);
Ted Kremenek46a837c2008-09-05 17:16:31 +00001178 }
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001179 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) {
1180 if (PrevDecl)
1181 Decl->TypeForDecl = PrevDecl->TypeForDecl;
Steve Naroff93fd2112009-01-27 22:08:43 +00001182 else
1183 Decl->TypeForDecl = new (*this,8) EnumType(Enum);
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001184 }
Argiris Kirtzidisea29d1e2008-08-07 20:55:28 +00001185 else
Douglas Gregor1d661552008-04-13 21:07:44 +00001186 assert(false && "TypeDecl without a type?");
Argiris Kirtzidisea29d1e2008-08-07 20:55:28 +00001187
Ted Kremenek46a837c2008-09-05 17:16:31 +00001188 if (!PrevDecl) Types.push_back(Decl->TypeForDecl);
Argiris Kirtzidisea29d1e2008-08-07 20:55:28 +00001189 return QualType(Decl->TypeForDecl, 0);
Douglas Gregor1d661552008-04-13 21:07:44 +00001190}
1191
Chris Lattner4b009652007-07-25 00:24:17 +00001192/// getTypedefType - Return the unique reference to the type for the
1193/// specified typename decl.
1194QualType ASTContext::getTypedefType(TypedefDecl *Decl) {
1195 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
1196
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001197 QualType Canonical = getCanonicalType(Decl->getUnderlyingType());
Steve Naroff93fd2112009-01-27 22:08:43 +00001198 Decl->TypeForDecl = new(*this,8) TypedefType(Type::TypeName, Decl, Canonical);
Chris Lattner4b009652007-07-25 00:24:17 +00001199 Types.push_back(Decl->TypeForDecl);
1200 return QualType(Decl->TypeForDecl, 0);
1201}
1202
Ted Kremenek42730c52008-01-07 19:49:32 +00001203/// getObjCInterfaceType - Return the unique reference to the type for the
Steve Naroff81f1bba2007-09-06 21:24:23 +00001204/// specified ObjC interface decl.
Ted Kremenek42730c52008-01-07 19:49:32 +00001205QualType ASTContext::getObjCInterfaceType(ObjCInterfaceDecl *Decl) {
Steve Naroff81f1bba2007-09-06 21:24:23 +00001206 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
1207
Steve Naroff93fd2112009-01-27 22:08:43 +00001208 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, Decl);
Steve Naroff81f1bba2007-09-06 21:24:23 +00001209 Types.push_back(Decl->TypeForDecl);
1210 return QualType(Decl->TypeForDecl, 0);
1211}
1212
Fariborz Jahanian27ecc672009-02-14 20:13:28 +00001213/// buildObjCInterfaceType - Returns a new type for the interface
1214/// declaration, regardless. It also removes any previously built
1215/// record declaration so caller can rebuild it.
1216QualType ASTContext::buildObjCInterfaceType(ObjCInterfaceDecl *Decl) {
1217 const RecordDecl *&RD = ASTRecordForInterface[Decl];
1218 if (RD)
1219 RD = 0;
1220 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, Decl);
1221 Types.push_back(Decl->TypeForDecl);
1222 return QualType(Decl->TypeForDecl, 0);
1223}
1224
Douglas Gregora4918772009-02-05 23:33:38 +00001225/// \brief Retrieve the template type parameter type for a template
1226/// parameter with the given depth, index, and (optionally) name.
1227QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index,
1228 IdentifierInfo *Name) {
1229 llvm::FoldingSetNodeID ID;
1230 TemplateTypeParmType::Profile(ID, Depth, Index, Name);
1231 void *InsertPos = 0;
1232 TemplateTypeParmType *TypeParm
1233 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos);
1234
1235 if (TypeParm)
1236 return QualType(TypeParm, 0);
1237
1238 if (Name)
1239 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, Name,
1240 getTemplateTypeParmType(Depth, Index));
1241 else
1242 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index);
1243
1244 Types.push_back(TypeParm);
1245 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos);
1246
1247 return QualType(TypeParm, 0);
1248}
1249
Douglas Gregor8e458f42009-02-09 18:46:07 +00001250QualType
1251ASTContext::getClassTemplateSpecializationType(TemplateDecl *Template,
1252 unsigned NumArgs,
1253 uintptr_t *Args, bool *ArgIsType,
1254 QualType Canon) {
1255 llvm::FoldingSetNodeID ID;
1256 ClassTemplateSpecializationType::Profile(ID, Template, NumArgs, Args,
1257 ArgIsType);
1258 void *InsertPos = 0;
1259 ClassTemplateSpecializationType *Spec
1260 = ClassTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos);
1261
1262 if (Spec)
1263 return QualType(Spec, 0);
1264
1265 void *Mem = Allocate(sizeof(ClassTemplateSpecializationType) +
1266 (sizeof(uintptr_t) *
1267 (ClassTemplateSpecializationType::
1268 getNumPackedWords(NumArgs) +
1269 NumArgs)), 8);
1270 Spec = new (Mem) ClassTemplateSpecializationType(Template, NumArgs, Args,
1271 ArgIsType, Canon);
1272 Types.push_back(Spec);
1273 ClassTemplateSpecializationTypes.InsertNode(Spec, InsertPos);
1274
1275 return QualType(Spec, 0);
1276}
1277
Chris Lattnere1352302008-04-07 04:56:42 +00001278/// CmpProtocolNames - Comparison predicate for sorting protocols
1279/// alphabetically.
1280static bool CmpProtocolNames(const ObjCProtocolDecl *LHS,
1281 const ObjCProtocolDecl *RHS) {
Douglas Gregor24afd4a2008-11-17 14:58:09 +00001282 return LHS->getDeclName() < RHS->getDeclName();
Chris Lattnere1352302008-04-07 04:56:42 +00001283}
1284
1285static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols,
1286 unsigned &NumProtocols) {
1287 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols;
1288
1289 // Sort protocols, keyed by name.
1290 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames);
1291
1292 // Remove duplicates.
1293 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd);
1294 NumProtocols = ProtocolsEnd-Protocols;
1295}
1296
1297
Chris Lattnerb0c6a1f2008-04-07 04:44:08 +00001298/// getObjCQualifiedInterfaceType - Return a ObjCQualifiedInterfaceType type for
1299/// the given interface decl and the conforming protocol list.
Ted Kremenek42730c52008-01-07 19:49:32 +00001300QualType ASTContext::getObjCQualifiedInterfaceType(ObjCInterfaceDecl *Decl,
1301 ObjCProtocolDecl **Protocols, unsigned NumProtocols) {
Chris Lattnere1352302008-04-07 04:56:42 +00001302 // Sort the protocol list alphabetically to canonicalize it.
1303 SortAndUniqueProtocols(Protocols, NumProtocols);
1304
Fariborz Jahanian91193f62007-10-11 00:55:41 +00001305 llvm::FoldingSetNodeID ID;
Chris Lattner7cdcb252008-04-07 06:38:24 +00001306 ObjCQualifiedInterfaceType::Profile(ID, Decl, Protocols, NumProtocols);
Fariborz Jahanian91193f62007-10-11 00:55:41 +00001307
1308 void *InsertPos = 0;
Ted Kremenek42730c52008-01-07 19:49:32 +00001309 if (ObjCQualifiedInterfaceType *QT =
1310 ObjCQualifiedInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos))
Fariborz Jahanian91193f62007-10-11 00:55:41 +00001311 return QualType(QT, 0);
1312
1313 // No Match;
Ted Kremenek42730c52008-01-07 19:49:32 +00001314 ObjCQualifiedInterfaceType *QType =
Steve Naroff93fd2112009-01-27 22:08:43 +00001315 new (*this,8) ObjCQualifiedInterfaceType(Decl, Protocols, NumProtocols);
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001316
Fariborz Jahanian91193f62007-10-11 00:55:41 +00001317 Types.push_back(QType);
Ted Kremenek42730c52008-01-07 19:49:32 +00001318 ObjCQualifiedInterfaceTypes.InsertNode(QType, InsertPos);
Fariborz Jahanian91193f62007-10-11 00:55:41 +00001319 return QualType(QType, 0);
1320}
1321
Chris Lattnere1352302008-04-07 04:56:42 +00001322/// getObjCQualifiedIdType - Return an ObjCQualifiedIdType for the 'id' decl
1323/// and the conforming protocol list.
Chris Lattner4a68fe02008-07-26 00:46:50 +00001324QualType ASTContext::getObjCQualifiedIdType(ObjCProtocolDecl **Protocols,
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001325 unsigned NumProtocols) {
Chris Lattnere1352302008-04-07 04:56:42 +00001326 // Sort the protocol list alphabetically to canonicalize it.
1327 SortAndUniqueProtocols(Protocols, NumProtocols);
1328
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001329 llvm::FoldingSetNodeID ID;
Ted Kremenek42730c52008-01-07 19:49:32 +00001330 ObjCQualifiedIdType::Profile(ID, Protocols, NumProtocols);
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001331
1332 void *InsertPos = 0;
Ted Kremenek42730c52008-01-07 19:49:32 +00001333 if (ObjCQualifiedIdType *QT =
Chris Lattner4a68fe02008-07-26 00:46:50 +00001334 ObjCQualifiedIdTypes.FindNodeOrInsertPos(ID, InsertPos))
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001335 return QualType(QT, 0);
1336
1337 // No Match;
Ted Kremenekc70e7d02009-01-19 21:31:22 +00001338 ObjCQualifiedIdType *QType =
Steve Naroff93fd2112009-01-27 22:08:43 +00001339 new (*this,8) ObjCQualifiedIdType(Protocols, NumProtocols);
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001340 Types.push_back(QType);
Ted Kremenek42730c52008-01-07 19:49:32 +00001341 ObjCQualifiedIdTypes.InsertNode(QType, InsertPos);
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00001342 return QualType(QType, 0);
1343}
1344
Steve Naroff0604dd92007-08-01 18:02:17 +00001345/// getTypeOfExpr - Unlike many "get<Type>" functions, we can't unique
1346/// TypeOfExpr AST's (since expression's are never shared). For example,
1347/// multiple declarations that refer to "typeof(x)" all contain different
1348/// DeclRefExpr's. This doesn't effect the type checker, since it operates
1349/// on canonical type's (which are always unique).
Steve Naroff11b649c2007-08-01 17:20:42 +00001350QualType ASTContext::getTypeOfExpr(Expr *tofExpr) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001351 QualType Canonical = getCanonicalType(tofExpr->getType());
Steve Naroff93fd2112009-01-27 22:08:43 +00001352 TypeOfExpr *toe = new (*this,8) TypeOfExpr(tofExpr, Canonical);
Steve Naroff0604dd92007-08-01 18:02:17 +00001353 Types.push_back(toe);
1354 return QualType(toe, 0);
Steve Naroff7cbb1462007-07-31 12:34:36 +00001355}
1356
Steve Naroff0604dd92007-08-01 18:02:17 +00001357/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique
1358/// TypeOfType AST's. The only motivation to unique these nodes would be
1359/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be
1360/// an issue. This doesn't effect the type checker, since it operates
1361/// on canonical type's (which are always unique).
Steve Naroff7cbb1462007-07-31 12:34:36 +00001362QualType ASTContext::getTypeOfType(QualType tofType) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001363 QualType Canonical = getCanonicalType(tofType);
Steve Naroff93fd2112009-01-27 22:08:43 +00001364 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical);
Steve Naroff0604dd92007-08-01 18:02:17 +00001365 Types.push_back(tot);
1366 return QualType(tot, 0);
Steve Naroff7cbb1462007-07-31 12:34:36 +00001367}
1368
Chris Lattner4b009652007-07-25 00:24:17 +00001369/// getTagDeclType - Return the unique reference to the type for the
1370/// specified TagDecl (struct/union/class/enum) decl.
1371QualType ASTContext::getTagDeclType(TagDecl *Decl) {
Ted Kremenekae8fa032007-11-26 21:16:01 +00001372 assert (Decl);
Douglas Gregor1d661552008-04-13 21:07:44 +00001373 return getTypeDeclType(Decl);
Chris Lattner4b009652007-07-25 00:24:17 +00001374}
1375
1376/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result
1377/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and
1378/// needs to agree with the definition in <stddef.h>.
1379QualType ASTContext::getSizeType() const {
Douglas Gregorc6507e42008-11-03 14:12:49 +00001380 return getFromTargetType(Target.getSizeType());
Chris Lattner4b009652007-07-25 00:24:17 +00001381}
1382
Argiris Kirtzidis2a4e1162008-08-09 17:20:01 +00001383/// getWCharType - Return the unique type for "wchar_t" (C99 7.17), the
Eli Friedmanfdd35d72008-02-12 08:29:21 +00001384/// width of characters in wide strings, The value is target dependent and
1385/// needs to agree with the definition in <stddef.h>.
Argiris Kirtzidis2a4e1162008-08-09 17:20:01 +00001386QualType ASTContext::getWCharType() const {
Argiris Kirtzidis1ed03e72008-08-09 16:51:54 +00001387 if (LangOpts.CPlusPlus)
1388 return WCharTy;
1389
Douglas Gregorc6507e42008-11-03 14:12:49 +00001390 // FIXME: In C, shouldn't WCharTy just be a typedef of the target's
1391 // wide-character type?
1392 return getFromTargetType(Target.getWCharType());
Eli Friedmanfdd35d72008-02-12 08:29:21 +00001393}
1394
Argiris Kirtzidis1ed03e72008-08-09 16:51:54 +00001395/// getSignedWCharType - Return the type of "signed wchar_t".
1396/// Used when in C++, as a GCC extension.
1397QualType ASTContext::getSignedWCharType() const {
1398 // FIXME: derive from "Target" ?
1399 return WCharTy;
1400}
1401
1402/// getUnsignedWCharType - Return the type of "unsigned wchar_t".
1403/// Used when in C++, as a GCC extension.
1404QualType ASTContext::getUnsignedWCharType() const {
1405 // FIXME: derive from "Target" ?
1406 return UnsignedIntTy;
1407}
1408
Chris Lattner4b009652007-07-25 00:24:17 +00001409/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?)
1410/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
1411QualType ASTContext::getPointerDiffType() const {
Douglas Gregorc6507e42008-11-03 14:12:49 +00001412 return getFromTargetType(Target.getPtrDiffType(0));
Chris Lattner4b009652007-07-25 00:24:17 +00001413}
1414
Chris Lattner19eb97e2008-04-02 05:18:44 +00001415//===----------------------------------------------------------------------===//
1416// Type Operators
1417//===----------------------------------------------------------------------===//
1418
Chris Lattner3dae6f42008-04-06 22:41:35 +00001419/// getCanonicalType - Return the canonical (structural) type corresponding to
1420/// the specified potentially non-canonical type. The non-canonical version
1421/// of a type may have many "decorated" versions of types. Decorators can
1422/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed
1423/// to be free of any of these, allowing two canonical types to be compared
1424/// for exact equality with a simple pointer comparison.
1425QualType ASTContext::getCanonicalType(QualType T) {
1426 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal();
Chris Lattnera1923f62008-08-04 07:31:14 +00001427
1428 // If the result has type qualifiers, make sure to canonicalize them as well.
1429 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers();
1430 if (TypeQuals == 0) return CanType;
1431
1432 // If the type qualifiers are on an array type, get the canonical type of the
1433 // array with the qualifiers applied to the element type.
1434 ArrayType *AT = dyn_cast<ArrayType>(CanType);
1435 if (!AT)
1436 return CanType.getQualifiedType(TypeQuals);
1437
1438 // Get the canonical version of the element with the extra qualifiers on it.
1439 // This can recursively sink qualifiers through multiple levels of arrays.
1440 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals);
1441 NewEltTy = getCanonicalType(NewEltTy);
1442
1443 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT))
1444 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(),
1445 CAT->getIndexTypeQualifier());
1446 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT))
1447 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(),
1448 IAT->getIndexTypeQualifier());
1449
Douglas Gregor1b21c7f2008-12-05 23:32:09 +00001450 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT))
1451 return getDependentSizedArrayType(NewEltTy, DSAT->getSizeExpr(),
1452 DSAT->getSizeModifier(),
1453 DSAT->getIndexTypeQualifier());
1454
Chris Lattnera1923f62008-08-04 07:31:14 +00001455 VariableArrayType *VAT = cast<VariableArrayType>(AT);
1456 return getVariableArrayType(NewEltTy, VAT->getSizeExpr(),
1457 VAT->getSizeModifier(),
1458 VAT->getIndexTypeQualifier());
1459}
1460
1461
1462const ArrayType *ASTContext::getAsArrayType(QualType T) {
1463 // Handle the non-qualified case efficiently.
1464 if (T.getCVRQualifiers() == 0) {
1465 // Handle the common positive case fast.
1466 if (const ArrayType *AT = dyn_cast<ArrayType>(T))
1467 return AT;
1468 }
1469
1470 // Handle the common negative case fast, ignoring CVR qualifiers.
1471 QualType CType = T->getCanonicalTypeInternal();
1472
Fariborz Jahanianb60352a2009-02-17 18:27:45 +00001473 // Make sure to look through type qualifiers (like ExtQuals) for the negative
Chris Lattnera1923f62008-08-04 07:31:14 +00001474 // test.
1475 if (!isa<ArrayType>(CType) &&
1476 !isa<ArrayType>(CType.getUnqualifiedType()))
1477 return 0;
1478
1479 // Apply any CVR qualifiers from the array type to the element type. This
1480 // implements C99 6.7.3p8: "If the specification of an array type includes
1481 // any type qualifiers, the element type is so qualified, not the array type."
1482
1483 // If we get here, we either have type qualifiers on the type, or we have
1484 // sugar such as a typedef in the way. If we have type qualifiers on the type
1485 // we must propagate them down into the elemeng type.
1486 unsigned CVRQuals = T.getCVRQualifiers();
1487 unsigned AddrSpace = 0;
1488 Type *Ty = T.getTypePtr();
1489
Fariborz Jahanianb60352a2009-02-17 18:27:45 +00001490 // Rip through ExtQualType's and typedefs to get to a concrete type.
Chris Lattnera1923f62008-08-04 07:31:14 +00001491 while (1) {
Fariborz Jahanianb60352a2009-02-17 18:27:45 +00001492 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) {
1493 AddrSpace = EXTQT->getAddressSpace();
1494 Ty = EXTQT->getBaseType();
Chris Lattnera1923f62008-08-04 07:31:14 +00001495 } else {
1496 T = Ty->getDesugaredType();
1497 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0)
1498 break;
1499 CVRQuals |= T.getCVRQualifiers();
1500 Ty = T.getTypePtr();
1501 }
1502 }
1503
1504 // If we have a simple case, just return now.
1505 const ArrayType *ATy = dyn_cast<ArrayType>(Ty);
1506 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0))
1507 return ATy;
1508
1509 // Otherwise, we have an array and we have qualifiers on it. Push the
1510 // qualifiers into the array element type and return a new array type.
1511 // Get the canonical version of the element with the extra qualifiers on it.
1512 // This can recursively sink qualifiers through multiple levels of arrays.
1513 QualType NewEltTy = ATy->getElementType();
1514 if (AddrSpace)
Fariborz Jahanianb60352a2009-02-17 18:27:45 +00001515 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace);
Chris Lattnera1923f62008-08-04 07:31:14 +00001516 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals);
1517
1518 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy))
1519 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(),
1520 CAT->getSizeModifier(),
1521 CAT->getIndexTypeQualifier()));
1522 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy))
1523 return cast<ArrayType>(getIncompleteArrayType(NewEltTy,
1524 IAT->getSizeModifier(),
1525 IAT->getIndexTypeQualifier()));
Douglas Gregor1b21c7f2008-12-05 23:32:09 +00001526
Douglas Gregor1b21c7f2008-12-05 23:32:09 +00001527 if (const DependentSizedArrayType *DSAT
1528 = dyn_cast<DependentSizedArrayType>(ATy))
1529 return cast<ArrayType>(
1530 getDependentSizedArrayType(NewEltTy,
1531 DSAT->getSizeExpr(),
1532 DSAT->getSizeModifier(),
1533 DSAT->getIndexTypeQualifier()));
Chris Lattnera1923f62008-08-04 07:31:14 +00001534
Chris Lattnera1923f62008-08-04 07:31:14 +00001535 const VariableArrayType *VAT = cast<VariableArrayType>(ATy);
1536 return cast<ArrayType>(getVariableArrayType(NewEltTy, VAT->getSizeExpr(),
1537 VAT->getSizeModifier(),
1538 VAT->getIndexTypeQualifier()));
Chris Lattner3dae6f42008-04-06 22:41:35 +00001539}
1540
1541
Chris Lattner19eb97e2008-04-02 05:18:44 +00001542/// getArrayDecayedType - Return the properly qualified result of decaying the
1543/// specified array type to a pointer. This operation is non-trivial when
1544/// handling typedefs etc. The canonical type of "T" must be an array type,
1545/// this returns a pointer to a properly qualified element of the array.
1546///
1547/// See C99 6.7.5.3p7 and C99 6.3.2.1p3.
1548QualType ASTContext::getArrayDecayedType(QualType Ty) {
Chris Lattnera1923f62008-08-04 07:31:14 +00001549 // Get the element type with 'getAsArrayType' so that we don't lose any
1550 // typedefs in the element type of the array. This also handles propagation
1551 // of type qualifiers from the array type into the element type if present
1552 // (C99 6.7.3p8).
1553 const ArrayType *PrettyArrayType = getAsArrayType(Ty);
1554 assert(PrettyArrayType && "Not an array type!");
Chris Lattner19eb97e2008-04-02 05:18:44 +00001555
Chris Lattnera1923f62008-08-04 07:31:14 +00001556 QualType PtrTy = getPointerType(PrettyArrayType->getElementType());
Chris Lattner19eb97e2008-04-02 05:18:44 +00001557
1558 // int x[restrict 4] -> int *restrict
Chris Lattnera1923f62008-08-04 07:31:14 +00001559 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier());
Chris Lattner19eb97e2008-04-02 05:18:44 +00001560}
1561
Daniel Dunbar4a0b75c2009-01-05 22:14:37 +00001562QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) {
Anders Carlsson76d19c82008-12-21 03:44:36 +00001563 QualType ElemTy = VAT->getElementType();
1564
1565 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy))
1566 return getBaseElementType(VAT);
1567
1568 return ElemTy;
1569}
1570
Chris Lattner4b009652007-07-25 00:24:17 +00001571/// getFloatingRank - Return a relative rank for floating point types.
1572/// This routine will assert if passed a built-in type that isn't a float.
Chris Lattnerd7135b42008-04-06 23:38:49 +00001573static FloatingRank getFloatingRank(QualType T) {
Christopher Lamb2a72bb32008-02-04 02:31:56 +00001574 if (const ComplexType *CT = T->getAsComplexType())
Chris Lattner4b009652007-07-25 00:24:17 +00001575 return getFloatingRank(CT->getElementType());
Chris Lattnerd7135b42008-04-06 23:38:49 +00001576
Daniel Dunbar4a0b75c2009-01-05 22:14:37 +00001577 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type");
Christopher Lamb2a72bb32008-02-04 02:31:56 +00001578 switch (T->getAsBuiltinType()->getKind()) {
Chris Lattnerd7135b42008-04-06 23:38:49 +00001579 default: assert(0 && "getFloatingRank(): not a floating type");
Chris Lattner4b009652007-07-25 00:24:17 +00001580 case BuiltinType::Float: return FloatRank;
1581 case BuiltinType::Double: return DoubleRank;
1582 case BuiltinType::LongDouble: return LongDoubleRank;
1583 }
1584}
1585
Steve Narofffa0c4532007-08-27 01:41:48 +00001586/// getFloatingTypeOfSizeWithinDomain - Returns a real floating
1587/// point or a complex type (based on typeDomain/typeSize).
1588/// 'typeDomain' is a real floating point or complex type.
1589/// 'typeSize' is a real floating point or complex type.
Chris Lattner7794ae22008-04-06 23:58:54 +00001590QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size,
1591 QualType Domain) const {
1592 FloatingRank EltRank = getFloatingRank(Size);
1593 if (Domain->isComplexType()) {
1594 switch (EltRank) {
Steve Narofffa0c4532007-08-27 01:41:48 +00001595 default: assert(0 && "getFloatingRank(): illegal value for rank");
Steve Naroff3cf497f2007-08-27 01:27:54 +00001596 case FloatRank: return FloatComplexTy;
1597 case DoubleRank: return DoubleComplexTy;
1598 case LongDoubleRank: return LongDoubleComplexTy;
1599 }
Chris Lattner4b009652007-07-25 00:24:17 +00001600 }
Chris Lattner7794ae22008-04-06 23:58:54 +00001601
1602 assert(Domain->isRealFloatingType() && "Unknown domain!");
1603 switch (EltRank) {
1604 default: assert(0 && "getFloatingRank(): illegal value for rank");
1605 case FloatRank: return FloatTy;
1606 case DoubleRank: return DoubleTy;
1607 case LongDoubleRank: return LongDoubleTy;
Steve Naroff3cf497f2007-08-27 01:27:54 +00001608 }
Chris Lattner4b009652007-07-25 00:24:17 +00001609}
1610
Chris Lattner51285d82008-04-06 23:55:33 +00001611/// getFloatingTypeOrder - Compare the rank of the two specified floating
1612/// point types, ignoring the domain of the type (i.e. 'double' ==
1613/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If
1614/// LHS < RHS, return -1.
Chris Lattnerd7135b42008-04-06 23:38:49 +00001615int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) {
1616 FloatingRank LHSR = getFloatingRank(LHS);
1617 FloatingRank RHSR = getFloatingRank(RHS);
1618
1619 if (LHSR == RHSR)
Steve Naroff45fc9822007-08-27 15:30:22 +00001620 return 0;
Chris Lattnerd7135b42008-04-06 23:38:49 +00001621 if (LHSR > RHSR)
Steve Naroff45fc9822007-08-27 15:30:22 +00001622 return 1;
1623 return -1;
Chris Lattner4b009652007-07-25 00:24:17 +00001624}
1625
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001626/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This
1627/// routine will assert if passed a built-in type that isn't an integer or enum,
1628/// or if it is not canonicalized.
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001629unsigned ASTContext::getIntegerRank(Type *T) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001630 assert(T->isCanonical() && "T should be canonicalized");
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001631 if (EnumType* ET = dyn_cast<EnumType>(T))
1632 T = ET->getDecl()->getIntegerType().getTypePtr();
1633
1634 // There are two things which impact the integer rank: the width, and
1635 // the ordering of builtins. The builtin ordering is encoded in the
1636 // bottom three bits; the width is encoded in the bits above that.
1637 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) {
1638 return FWIT->getWidth() << 3;
1639 }
1640
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001641 switch (cast<BuiltinType>(T)->getKind()) {
Chris Lattner51285d82008-04-06 23:55:33 +00001642 default: assert(0 && "getIntegerRank(): not a built-in integer");
1643 case BuiltinType::Bool:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001644 return 1 + (getIntWidth(BoolTy) << 3);
Chris Lattner51285d82008-04-06 23:55:33 +00001645 case BuiltinType::Char_S:
1646 case BuiltinType::Char_U:
1647 case BuiltinType::SChar:
1648 case BuiltinType::UChar:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001649 return 2 + (getIntWidth(CharTy) << 3);
Chris Lattner51285d82008-04-06 23:55:33 +00001650 case BuiltinType::Short:
1651 case BuiltinType::UShort:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001652 return 3 + (getIntWidth(ShortTy) << 3);
Chris Lattner51285d82008-04-06 23:55:33 +00001653 case BuiltinType::Int:
1654 case BuiltinType::UInt:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001655 return 4 + (getIntWidth(IntTy) << 3);
Chris Lattner51285d82008-04-06 23:55:33 +00001656 case BuiltinType::Long:
1657 case BuiltinType::ULong:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001658 return 5 + (getIntWidth(LongTy) << 3);
Chris Lattner51285d82008-04-06 23:55:33 +00001659 case BuiltinType::LongLong:
1660 case BuiltinType::ULongLong:
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00001661 return 6 + (getIntWidth(LongLongTy) << 3);
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001662 }
1663}
1664
Chris Lattner51285d82008-04-06 23:55:33 +00001665/// getIntegerTypeOrder - Returns the highest ranked integer type:
1666/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If
1667/// LHS < RHS, return -1.
1668int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) {
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001669 Type *LHSC = getCanonicalType(LHS).getTypePtr();
1670 Type *RHSC = getCanonicalType(RHS).getTypePtr();
Chris Lattner51285d82008-04-06 23:55:33 +00001671 if (LHSC == RHSC) return 0;
Chris Lattner4b009652007-07-25 00:24:17 +00001672
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001673 bool LHSUnsigned = LHSC->isUnsignedIntegerType();
1674 bool RHSUnsigned = RHSC->isUnsignedIntegerType();
Chris Lattner4b009652007-07-25 00:24:17 +00001675
Chris Lattner51285d82008-04-06 23:55:33 +00001676 unsigned LHSRank = getIntegerRank(LHSC);
1677 unsigned RHSRank = getIntegerRank(RHSC);
Chris Lattner4b009652007-07-25 00:24:17 +00001678
Chris Lattner51285d82008-04-06 23:55:33 +00001679 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned.
1680 if (LHSRank == RHSRank) return 0;
1681 return LHSRank > RHSRank ? 1 : -1;
1682 }
Chris Lattner4b009652007-07-25 00:24:17 +00001683
Chris Lattner51285d82008-04-06 23:55:33 +00001684 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa.
1685 if (LHSUnsigned) {
1686 // If the unsigned [LHS] type is larger, return it.
1687 if (LHSRank >= RHSRank)
1688 return 1;
1689
1690 // If the signed type can represent all values of the unsigned type, it
1691 // wins. Because we are dealing with 2's complement and types that are
1692 // powers of two larger than each other, this is always safe.
1693 return -1;
1694 }
Chris Lattnerc1b68db2008-04-06 22:59:24 +00001695
Chris Lattner51285d82008-04-06 23:55:33 +00001696 // If the unsigned [RHS] type is larger, return it.
1697 if (RHSRank >= LHSRank)
1698 return -1;
1699
1700 // If the signed type can represent all values of the unsigned type, it
1701 // wins. Because we are dealing with 2's complement and types that are
1702 // powers of two larger than each other, this is always safe.
1703 return 1;
Chris Lattner4b009652007-07-25 00:24:17 +00001704}
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001705
1706// getCFConstantStringType - Return the type used for constant CFStrings.
1707QualType ASTContext::getCFConstantStringType() {
1708 if (!CFConstantStringTypeDecl) {
Chris Lattnere4650482008-03-15 06:12:44 +00001709 CFConstantStringTypeDecl =
Argiris Kirtzidisc6cc7d52008-06-09 23:19:58 +00001710 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(),
Ted Kremenek2c984042008-09-05 01:34:33 +00001711 &Idents.get("NSConstantString"));
Anders Carlssonbb2cf512007-11-19 00:25:30 +00001712 QualType FieldTypes[4];
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001713
1714 // const int *isa;
1715 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const));
Anders Carlssonbb2cf512007-11-19 00:25:30 +00001716 // int flags;
1717 FieldTypes[1] = IntTy;
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001718 // const char *str;
Anders Carlssonbb2cf512007-11-19 00:25:30 +00001719 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const));
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001720 // long length;
Anders Carlssonbb2cf512007-11-19 00:25:30 +00001721 FieldTypes[3] = LongTy;
Douglas Gregor8acb7272008-12-11 16:49:14 +00001722
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001723 // Create fields
Douglas Gregor8acb7272008-12-11 16:49:14 +00001724 for (unsigned i = 0; i < 4; ++i) {
1725 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl,
1726 SourceLocation(), 0,
1727 FieldTypes[i], /*BitWidth=*/0,
Douglas Gregoraf8ad2b2009-01-20 01:17:11 +00001728 /*Mutable=*/false);
Douglas Gregor03b2ad22009-01-12 23:27:07 +00001729 CFConstantStringTypeDecl->addDecl(Field);
Douglas Gregor8acb7272008-12-11 16:49:14 +00001730 }
1731
1732 CFConstantStringTypeDecl->completeDefinition(*this);
Anders Carlssone7e7aa22007-08-17 05:31:46 +00001733 }
1734
1735 return getTagDeclType(CFConstantStringTypeDecl);
Gabor Greif61ce98c2007-09-11 15:32:40 +00001736}
Anders Carlssonfb5b1e82007-10-11 01:00:40 +00001737
Anders Carlssonf58cac72008-08-30 19:34:46 +00001738QualType ASTContext::getObjCFastEnumerationStateType()
1739{
1740 if (!ObjCFastEnumerationStateTypeDecl) {
Douglas Gregor8acb7272008-12-11 16:49:14 +00001741 ObjCFastEnumerationStateTypeDecl =
1742 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(),
1743 &Idents.get("__objcFastEnumerationState"));
1744
Anders Carlssonf58cac72008-08-30 19:34:46 +00001745 QualType FieldTypes[] = {
1746 UnsignedLongTy,
1747 getPointerType(ObjCIdType),
1748 getPointerType(UnsignedLongTy),
1749 getConstantArrayType(UnsignedLongTy,
1750 llvm::APInt(32, 5), ArrayType::Normal, 0)
1751 };
1752
Douglas Gregor8acb7272008-12-11 16:49:14 +00001753 for (size_t i = 0; i < 4; ++i) {
1754 FieldDecl *Field = FieldDecl::Create(*this,
1755 ObjCFastEnumerationStateTypeDecl,
1756 SourceLocation(), 0,
1757 FieldTypes[i], /*BitWidth=*/0,
Douglas Gregoraf8ad2b2009-01-20 01:17:11 +00001758 /*Mutable=*/false);
Douglas Gregor03b2ad22009-01-12 23:27:07 +00001759 ObjCFastEnumerationStateTypeDecl->addDecl(Field);
Douglas Gregor8acb7272008-12-11 16:49:14 +00001760 }
Anders Carlssonf58cac72008-08-30 19:34:46 +00001761
Douglas Gregor8acb7272008-12-11 16:49:14 +00001762 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this);
Anders Carlssonf58cac72008-08-30 19:34:46 +00001763 }
1764
1765 return getTagDeclType(ObjCFastEnumerationStateTypeDecl);
1766}
1767
Anders Carlssone3f02572007-10-29 06:33:42 +00001768// This returns true if a type has been typedefed to BOOL:
1769// typedef <type> BOOL;
Chris Lattnercb034cb2007-10-30 20:27:44 +00001770static bool isTypeTypedefedAsBOOL(QualType T) {
Anders Carlssone3f02572007-10-29 06:33:42 +00001771 if (const TypedefType *TT = dyn_cast<TypedefType>(T))
Chris Lattner85fb3842008-11-24 03:52:59 +00001772 if (IdentifierInfo *II = TT->getDecl()->getIdentifier())
1773 return II->isStr("BOOL");
Anders Carlsson36f07d82007-10-29 05:01:08 +00001774
1775 return false;
1776}
1777
Ted Kremenek42730c52008-01-07 19:49:32 +00001778/// getObjCEncodingTypeSize returns size of type for objective-c encoding
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001779/// purpose.
Ted Kremenek42730c52008-01-07 19:49:32 +00001780int ASTContext::getObjCEncodingTypeSize(QualType type) {
Chris Lattner8cd0e932008-03-05 18:54:05 +00001781 uint64_t sz = getTypeSize(type);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001782
1783 // Make all integer and enum types at least as large as an int
1784 if (sz > 0 && type->isIntegralType())
Chris Lattner8cd0e932008-03-05 18:54:05 +00001785 sz = std::max(sz, getTypeSize(IntTy));
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001786 // Treat arrays as pointers, since that's how they're passed in.
1787 else if (type->isArrayType())
Chris Lattner8cd0e932008-03-05 18:54:05 +00001788 sz = getTypeSize(VoidPtrTy);
1789 return sz / getTypeSize(CharTy);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001790}
1791
Ted Kremenek42730c52008-01-07 19:49:32 +00001792/// getObjCEncodingForMethodDecl - Return the encoded type for this method
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001793/// declaration.
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001794void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl,
Chris Lattnerae430292008-11-19 07:24:05 +00001795 std::string& S) {
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001796 // FIXME: This is not very efficient.
Fariborz Jahanian65e7eb52007-11-01 17:18:37 +00001797 // Encode type qualifer, 'in', 'inout', etc. for the return type.
Ted Kremenek42730c52008-01-07 19:49:32 +00001798 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001799 // Encode result type.
Daniel Dunbarc9197cd2008-10-17 20:21:44 +00001800 getObjCEncodingForType(Decl->getResultType(), S);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001801 // Compute size of all parameters.
1802 // Start with computing size of a pointer in number of bytes.
1803 // FIXME: There might(should) be a better way of doing this computation!
1804 SourceLocation Loc;
Chris Lattner8cd0e932008-03-05 18:54:05 +00001805 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001806 // The first two arguments (self and _cmd) are pointers; account for
1807 // their size.
1808 int ParmOffset = 2 * PtrSize;
1809 int NumOfParams = Decl->getNumParams();
1810 for (int i = 0; i < NumOfParams; i++) {
1811 QualType PType = Decl->getParamDecl(i)->getType();
Ted Kremenek42730c52008-01-07 19:49:32 +00001812 int sz = getObjCEncodingTypeSize (PType);
1813 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type");
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001814 ParmOffset += sz;
1815 }
1816 S += llvm::utostr(ParmOffset);
1817 S += "@0:";
1818 S += llvm::utostr(PtrSize);
1819
1820 // Argument types.
1821 ParmOffset = 2 * PtrSize;
1822 for (int i = 0; i < NumOfParams; i++) {
Fariborz Jahaniane26cb432008-12-20 23:29:59 +00001823 ParmVarDecl *PVDecl = Decl->getParamDecl(i);
1824 QualType PType = PVDecl->getOriginalType();
1825 if (const ArrayType *AT =
1826 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal()))
1827 // Use array's original type only if it has known number of
1828 // elements.
1829 if (!dyn_cast<ConstantArrayType>(AT))
1830 PType = PVDecl->getType();
Fariborz Jahanian65e7eb52007-11-01 17:18:37 +00001831 // Process argument qualifiers for user supplied arguments; such as,
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001832 // 'in', 'inout', etc.
Fariborz Jahaniane26cb432008-12-20 23:29:59 +00001833 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S);
Daniel Dunbarc9197cd2008-10-17 20:21:44 +00001834 getObjCEncodingForType(PType, S);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001835 S += llvm::utostr(ParmOffset);
Ted Kremenek42730c52008-01-07 19:49:32 +00001836 ParmOffset += getObjCEncodingTypeSize(PType);
Fariborz Jahanianc81f3162007-10-29 22:57:28 +00001837 }
1838}
1839
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001840/// getObjCEncodingForPropertyDecl - Return the encoded type for this
Fariborz Jahanian501ef5c2009-01-20 20:04:12 +00001841/// property declaration. If non-NULL, Container must be either an
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001842/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be
1843/// NULL when getting encodings for protocol properties.
Fariborz Jahanian501ef5c2009-01-20 20:04:12 +00001844/// Property attributes are stored as a comma-delimited C string. The simple
1845/// attributes readonly and bycopy are encoded as single characters. The
1846/// parametrized attributes, getter=name, setter=name, and ivar=name, are
1847/// encoded as single characters, followed by an identifier. Property types
1848/// are also encoded as a parametrized attribute. The characters used to encode
1849/// these attributes are defined by the following enumeration:
1850/// @code
1851/// enum PropertyAttributes {
1852/// kPropertyReadOnly = 'R', // property is read-only.
1853/// kPropertyBycopy = 'C', // property is a copy of the value last assigned
1854/// kPropertyByref = '&', // property is a reference to the value last assigned
1855/// kPropertyDynamic = 'D', // property is dynamic
1856/// kPropertyGetter = 'G', // followed by getter selector name
1857/// kPropertySetter = 'S', // followed by setter selector name
1858/// kPropertyInstanceVariable = 'V' // followed by instance variable name
1859/// kPropertyType = 't' // followed by old-style type encoding.
1860/// kPropertyWeak = 'W' // 'weak' property
1861/// kPropertyStrong = 'P' // property GC'able
1862/// kPropertyNonAtomic = 'N' // property non-atomic
1863/// };
1864/// @endcode
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001865void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD,
1866 const Decl *Container,
Chris Lattnerae430292008-11-19 07:24:05 +00001867 std::string& S) {
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001868 // Collect information from the property implementation decl(s).
1869 bool Dynamic = false;
1870 ObjCPropertyImplDecl *SynthesizePID = 0;
1871
1872 // FIXME: Duplicated code due to poor abstraction.
1873 if (Container) {
1874 if (const ObjCCategoryImplDecl *CID =
1875 dyn_cast<ObjCCategoryImplDecl>(Container)) {
1876 for (ObjCCategoryImplDecl::propimpl_iterator
1877 i = CID->propimpl_begin(), e = CID->propimpl_end(); i != e; ++i) {
1878 ObjCPropertyImplDecl *PID = *i;
1879 if (PID->getPropertyDecl() == PD) {
1880 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) {
1881 Dynamic = true;
1882 } else {
1883 SynthesizePID = PID;
1884 }
1885 }
1886 }
1887 } else {
Chris Lattner2fda0ed2008-10-05 17:34:18 +00001888 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container);
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001889 for (ObjCCategoryImplDecl::propimpl_iterator
1890 i = OID->propimpl_begin(), e = OID->propimpl_end(); i != e; ++i) {
1891 ObjCPropertyImplDecl *PID = *i;
1892 if (PID->getPropertyDecl() == PD) {
1893 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) {
1894 Dynamic = true;
1895 } else {
1896 SynthesizePID = PID;
1897 }
1898 }
1899 }
1900 }
1901 }
1902
1903 // FIXME: This is not very efficient.
1904 S = "T";
1905
1906 // Encode result type.
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00001907 // GCC has some special rules regarding encoding of properties which
1908 // closely resembles encoding of ivars.
1909 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, NULL,
1910 true /* outermost type */,
1911 true /* encoding for property */);
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001912
1913 if (PD->isReadOnly()) {
1914 S += ",R";
1915 } else {
1916 switch (PD->getSetterKind()) {
1917 case ObjCPropertyDecl::Assign: break;
1918 case ObjCPropertyDecl::Copy: S += ",C"; break;
1919 case ObjCPropertyDecl::Retain: S += ",&"; break;
1920 }
1921 }
1922
1923 // It really isn't clear at all what this means, since properties
1924 // are "dynamic by default".
1925 if (Dynamic)
1926 S += ",D";
1927
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00001928 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic)
1929 S += ",N";
1930
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001931 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
1932 S += ",G";
Chris Lattner3a8f2942008-11-24 03:33:13 +00001933 S += PD->getGetterName().getAsString();
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001934 }
1935
1936 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
1937 S += ",S";
Chris Lattner3a8f2942008-11-24 03:33:13 +00001938 S += PD->getSetterName().getAsString();
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001939 }
1940
1941 if (SynthesizePID) {
1942 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl();
1943 S += ",V";
Chris Lattner6c5ec622008-11-24 04:00:27 +00001944 S += OID->getNameAsString();
Daniel Dunbar698d6f32008-08-28 04:38:10 +00001945 }
1946
1947 // FIXME: OBJCGC: weak & strong
1948}
1949
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00001950/// getLegacyIntegralTypeEncoding -
1951/// Another legacy compatibility encoding: 32-bit longs are encoded as
Fariborz Jahanian89155952009-02-11 23:59:18 +00001952/// 'l' or 'L' , but not always. For typedefs, we need to use
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00001953/// 'i' or 'I' instead if encoding a struct field, or a pointer!
1954///
1955void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const {
1956 if (dyn_cast<TypedefType>(PointeeTy.getTypePtr())) {
1957 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) {
Fariborz Jahanian89155952009-02-11 23:59:18 +00001958 if (BT->getKind() == BuiltinType::ULong &&
1959 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32))
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00001960 PointeeTy = UnsignedIntTy;
Fariborz Jahanian89155952009-02-11 23:59:18 +00001961 else
1962 if (BT->getKind() == BuiltinType::Long &&
1963 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32))
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00001964 PointeeTy = IntTy;
1965 }
1966 }
1967}
1968
Fariborz Jahanian248db262008-01-22 22:44:46 +00001969void ASTContext::getObjCEncodingForType(QualType T, std::string& S,
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00001970 FieldDecl *Field) const {
Daniel Dunbarf8cfe562008-10-17 07:30:50 +00001971 // We follow the behavior of gcc, expanding structures which are
1972 // directly pointed to, and expanding embedded structures. Note that
1973 // these rules are sufficient to prevent recursive encoding of the
1974 // same type.
Fariborz Jahanian89ed86b2008-12-22 23:22:27 +00001975 getObjCEncodingForTypeImpl(T, S, true, true, Field,
1976 true /* outermost type */);
Daniel Dunbarf8cfe562008-10-17 07:30:50 +00001977}
1978
Fariborz Jahaniand1361952009-01-13 01:18:13 +00001979static void EncodeBitField(const ASTContext *Context, std::string& S,
1980 FieldDecl *FD) {
1981 const Expr *E = FD->getBitWidth();
1982 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl");
1983 ASTContext *Ctx = const_cast<ASTContext*>(Context);
1984 unsigned N = E->getIntegerConstantExprValue(*Ctx).getZExtValue();
1985 S += 'b';
1986 S += llvm::utostr(N);
1987}
1988
Daniel Dunbarf8cfe562008-10-17 07:30:50 +00001989void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S,
1990 bool ExpandPointedToStructures,
1991 bool ExpandStructures,
Fariborz Jahanian89ed86b2008-12-22 23:22:27 +00001992 FieldDecl *FD,
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00001993 bool OutermostType,
1994 bool EncodingProperty) const {
Anders Carlssone3f02572007-10-29 06:33:42 +00001995 if (const BuiltinType *BT = T->getAsBuiltinType()) {
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00001996 if (FD && FD->isBitField()) {
Fariborz Jahaniand1361952009-01-13 01:18:13 +00001997 EncodeBitField(this, S, FD);
Anders Carlsson36f07d82007-10-29 05:01:08 +00001998 }
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00001999 else {
2000 char encoding;
2001 switch (BT->getKind()) {
2002 default: assert(0 && "Unhandled builtin type kind");
2003 case BuiltinType::Void: encoding = 'v'; break;
2004 case BuiltinType::Bool: encoding = 'B'; break;
2005 case BuiltinType::Char_U:
2006 case BuiltinType::UChar: encoding = 'C'; break;
2007 case BuiltinType::UShort: encoding = 'S'; break;
2008 case BuiltinType::UInt: encoding = 'I'; break;
Fariborz Jahanianebd95752009-02-11 22:31:45 +00002009 case BuiltinType::ULong:
2010 encoding =
2011 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q';
2012 break;
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002013 case BuiltinType::ULongLong: encoding = 'Q'; break;
2014 case BuiltinType::Char_S:
2015 case BuiltinType::SChar: encoding = 'c'; break;
2016 case BuiltinType::Short: encoding = 's'; break;
2017 case BuiltinType::Int: encoding = 'i'; break;
Fariborz Jahanianebd95752009-02-11 22:31:45 +00002018 case BuiltinType::Long:
2019 encoding =
2020 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q';
2021 break;
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002022 case BuiltinType::LongLong: encoding = 'q'; break;
2023 case BuiltinType::Float: encoding = 'f'; break;
2024 case BuiltinType::Double: encoding = 'd'; break;
2025 case BuiltinType::LongDouble: encoding = 'd'; break;
2026 }
Anders Carlsson36f07d82007-10-29 05:01:08 +00002027
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002028 S += encoding;
2029 }
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00002030 }
Ted Kremenek42730c52008-01-07 19:49:32 +00002031 else if (T->isObjCQualifiedIdType()) {
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00002032 getObjCEncodingForTypeImpl(getObjCIdType(), S,
2033 ExpandPointedToStructures,
2034 ExpandStructures, FD);
2035 if (FD || EncodingProperty) {
2036 // Note that we do extended encoding of protocol qualifer list
2037 // Only when doing ivar or property encoding.
2038 const ObjCQualifiedIdType *QIDT = T->getAsObjCQualifiedIdType();
2039 S += '"';
2040 for (unsigned i =0; i < QIDT->getNumProtocols(); i++) {
2041 ObjCProtocolDecl *Proto = QIDT->getProtocols(i);
2042 S += '<';
2043 S += Proto->getNameAsString();
2044 S += '>';
2045 }
2046 S += '"';
2047 }
2048 return;
Fariborz Jahaniane76e8412007-12-17 21:03:50 +00002049 }
2050 else if (const PointerType *PT = T->getAsPointerType()) {
Anders Carlsson36f07d82007-10-29 05:01:08 +00002051 QualType PointeeTy = PT->getPointeeType();
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00002052 bool isReadOnly = false;
2053 // For historical/compatibility reasons, the read-only qualifier of the
2054 // pointee gets emitted _before_ the '^'. The read-only qualifier of
2055 // the pointer itself gets ignored, _unless_ we are looking at a typedef!
2056 // Also, do not emit the 'r' for anything but the outermost type!
2057 if (dyn_cast<TypedefType>(T.getTypePtr())) {
2058 if (OutermostType && T.isConstQualified()) {
2059 isReadOnly = true;
2060 S += 'r';
2061 }
2062 }
2063 else if (OutermostType) {
2064 QualType P = PointeeTy;
2065 while (P->getAsPointerType())
2066 P = P->getAsPointerType()->getPointeeType();
2067 if (P.isConstQualified()) {
2068 isReadOnly = true;
2069 S += 'r';
2070 }
2071 }
2072 if (isReadOnly) {
2073 // Another legacy compatibility encoding. Some ObjC qualifier and type
2074 // combinations need to be rearranged.
2075 // Rewrite "in const" from "nr" to "rn"
2076 const char * s = S.c_str();
2077 int len = S.length();
2078 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') {
2079 std::string replace = "rn";
2080 S.replace(S.end()-2, S.end(), replace);
2081 }
2082 }
Steve Naroff17c03822009-02-12 17:52:19 +00002083 if (isObjCIdStructType(PointeeTy)) {
Fariborz Jahanian80faffa2007-10-30 17:06:23 +00002084 S += '@';
2085 return;
Fariborz Jahanianc8679472008-12-19 00:14:49 +00002086 }
2087 else if (PointeeTy->isObjCInterfaceType()) {
Fariborz Jahanian94675042009-02-16 21:41:04 +00002088 if (!EncodingProperty &&
Fariborz Jahanian6bc0f2d2009-02-16 22:09:26 +00002089 isa<TypedefType>(PointeeTy.getTypePtr())) {
Fariborz Jahaniand3498aa2008-12-23 21:30:15 +00002090 // Another historical/compatibility reason.
2091 // We encode the underlying type which comes out as
2092 // {...};
2093 S += '^';
2094 getObjCEncodingForTypeImpl(PointeeTy, S,
2095 false, ExpandPointedToStructures,
2096 NULL);
2097 return;
2098 }
Fariborz Jahanianc8679472008-12-19 00:14:49 +00002099 S += '@';
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00002100 if (FD || EncodingProperty) {
2101 const ObjCInterfaceType *OIT = PointeeTy->getAsObjCInterfaceType();
2102 ObjCInterfaceDecl *OI = OIT->getDecl();
Fariborz Jahanian320ac422008-12-20 19:17:01 +00002103 S += '"';
2104 S += OI->getNameAsCString();
Fariborz Jahanian892d5db2009-01-20 19:14:18 +00002105 for (unsigned i =0; i < OIT->getNumProtocols(); i++) {
2106 ObjCProtocolDecl *Proto = OIT->getProtocol(i);
2107 S += '<';
2108 S += Proto->getNameAsString();
2109 S += '>';
2110 }
Fariborz Jahanian320ac422008-12-20 19:17:01 +00002111 S += '"';
2112 }
Fariborz Jahanianc8679472008-12-19 00:14:49 +00002113 return;
Steve Naroff17c03822009-02-12 17:52:19 +00002114 } else if (isObjCClassStructType(PointeeTy)) {
Anders Carlsson7f23e3d2007-10-31 02:53:19 +00002115 S += '#';
2116 return;
Ted Kremenek42730c52008-01-07 19:49:32 +00002117 } else if (isObjCSelType(PointeeTy)) {
Anders Carlsson7f23e3d2007-10-31 02:53:19 +00002118 S += ':';
2119 return;
Fariborz Jahanian80faffa2007-10-30 17:06:23 +00002120 }
Anders Carlsson36f07d82007-10-29 05:01:08 +00002121
2122 if (PointeeTy->isCharType()) {
2123 // char pointer types should be encoded as '*' unless it is a
2124 // type that has been typedef'd to 'BOOL'.
Anders Carlssone3f02572007-10-29 06:33:42 +00002125 if (!isTypeTypedefedAsBOOL(PointeeTy)) {
Anders Carlsson36f07d82007-10-29 05:01:08 +00002126 S += '*';
2127 return;
2128 }
2129 }
2130
2131 S += '^';
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00002132 getLegacyIntegralTypeEncoding(PointeeTy);
2133
2134 getObjCEncodingForTypeImpl(PointeeTy, S,
Daniel Dunbaraa913102008-10-17 16:17:37 +00002135 false, ExpandPointedToStructures,
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002136 NULL);
Chris Lattnera1923f62008-08-04 07:31:14 +00002137 } else if (const ArrayType *AT =
2138 // Ignore type qualifiers etc.
2139 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) {
Anders Carlsson36f07d82007-10-29 05:01:08 +00002140 S += '[';
2141
2142 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT))
2143 S += llvm::utostr(CAT->getSize().getZExtValue());
2144 else
2145 assert(0 && "Unhandled array type!");
2146
Daniel Dunbarf8cfe562008-10-17 07:30:50 +00002147 getObjCEncodingForTypeImpl(AT->getElementType(), S,
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002148 false, ExpandStructures, FD);
Anders Carlsson36f07d82007-10-29 05:01:08 +00002149 S += ']';
Anders Carlsson5695bb72007-10-30 00:06:20 +00002150 } else if (T->getAsFunctionType()) {
2151 S += '?';
Fariborz Jahanianc8ba2bd2007-11-13 23:21:38 +00002152 } else if (const RecordType *RTy = T->getAsRecordType()) {
Daniel Dunbarf8cfe562008-10-17 07:30:50 +00002153 RecordDecl *RDecl = RTy->getDecl();
Daniel Dunbaraa913102008-10-17 16:17:37 +00002154 S += RDecl->isUnion() ? '(' : '{';
Daniel Dunbar146b2d02008-10-17 06:22:57 +00002155 // Anonymous structures print as '?'
2156 if (const IdentifierInfo *II = RDecl->getIdentifier()) {
2157 S += II->getName();
2158 } else {
2159 S += '?';
2160 }
Daniel Dunbarc9197cd2008-10-17 20:21:44 +00002161 if (ExpandStructures) {
Fariborz Jahanian248db262008-01-22 22:44:46 +00002162 S += '=';
Douglas Gregor8acb7272008-12-11 16:49:14 +00002163 for (RecordDecl::field_iterator Field = RDecl->field_begin(),
2164 FieldEnd = RDecl->field_end();
2165 Field != FieldEnd; ++Field) {
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002166 if (FD) {
Daniel Dunbaraa913102008-10-17 16:17:37 +00002167 S += '"';
Douglas Gregor8acb7272008-12-11 16:49:14 +00002168 S += Field->getNameAsString();
Daniel Dunbaraa913102008-10-17 16:17:37 +00002169 S += '"';
2170 }
2171
2172 // Special case bit-fields.
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002173 if (Field->isBitField()) {
2174 getObjCEncodingForTypeImpl(Field->getType(), S, false, true,
2175 (*Field));
Daniel Dunbaraa913102008-10-17 16:17:37 +00002176 } else {
Fariborz Jahaniane07d9ec2008-12-23 19:56:47 +00002177 QualType qt = Field->getType();
2178 getLegacyIntegralTypeEncoding(qt);
2179 getObjCEncodingForTypeImpl(qt, S, false, true,
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002180 FD);
Daniel Dunbaraa913102008-10-17 16:17:37 +00002181 }
Fariborz Jahanian248db262008-01-22 22:44:46 +00002182 }
Fariborz Jahanianc8ba2bd2007-11-13 23:21:38 +00002183 }
Daniel Dunbaraa913102008-10-17 16:17:37 +00002184 S += RDecl->isUnion() ? ')' : '}';
Steve Naroff49af3f32007-12-12 22:30:11 +00002185 } else if (T->isEnumeralType()) {
Fariborz Jahaniand1361952009-01-13 01:18:13 +00002186 if (FD && FD->isBitField())
2187 EncodeBitField(this, S, FD);
2188 else
2189 S += 'i';
Steve Naroff62f09f52008-09-24 15:05:44 +00002190 } else if (T->isBlockPointerType()) {
Steve Naroff725e0662009-02-02 18:24:29 +00002191 S += "@?"; // Unlike a pointer-to-function, which is "^?".
Fariborz Jahanian0cd547f2008-12-19 23:34:38 +00002192 } else if (T->isObjCInterfaceType()) {
2193 // @encode(class_name)
2194 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl();
2195 S += '{';
2196 const IdentifierInfo *II = OI->getIdentifier();
2197 S += II->getName();
2198 S += '=';
2199 std::vector<FieldDecl*> RecFields;
2200 CollectObjCIvars(OI, RecFields);
2201 for (unsigned int i = 0; i != RecFields.size(); i++) {
2202 if (RecFields[i]->isBitField())
2203 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true,
2204 RecFields[i]);
2205 else
2206 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true,
2207 FD);
2208 }
2209 S += '}';
2210 }
2211 else
Steve Naroff53b6f4c2008-01-30 19:17:43 +00002212 assert(0 && "@encode for type not implemented!");
Anders Carlsson36f07d82007-10-29 05:01:08 +00002213}
2214
Ted Kremenek42730c52008-01-07 19:49:32 +00002215void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT,
Fariborz Jahanian65e7eb52007-11-01 17:18:37 +00002216 std::string& S) const {
2217 if (QT & Decl::OBJC_TQ_In)
2218 S += 'n';
2219 if (QT & Decl::OBJC_TQ_Inout)
2220 S += 'N';
2221 if (QT & Decl::OBJC_TQ_Out)
2222 S += 'o';
2223 if (QT & Decl::OBJC_TQ_Bycopy)
2224 S += 'O';
2225 if (QT & Decl::OBJC_TQ_Byref)
2226 S += 'R';
2227 if (QT & Decl::OBJC_TQ_Oneway)
2228 S += 'V';
2229}
2230
Anders Carlssonfb5b1e82007-10-11 01:00:40 +00002231void ASTContext::setBuiltinVaListType(QualType T)
2232{
2233 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!");
2234
2235 BuiltinVaListType = T;
2236}
2237
Ted Kremenek42730c52008-01-07 19:49:32 +00002238void ASTContext::setObjCIdType(TypedefDecl *TD)
Steve Naroff9d12c902007-10-15 14:41:52 +00002239{
Ted Kremenek42730c52008-01-07 19:49:32 +00002240 ObjCIdType = getTypedefType(TD);
Steve Naroff9d12c902007-10-15 14:41:52 +00002241
2242 // typedef struct objc_object *id;
2243 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType();
Fariborz Jahaniande939672009-01-16 19:58:32 +00002244 // User error - caller will issue diagnostics.
2245 if (!ptr)
2246 return;
Steve Naroff9d12c902007-10-15 14:41:52 +00002247 const RecordType *rec = ptr->getPointeeType()->getAsStructureType();
Fariborz Jahaniande939672009-01-16 19:58:32 +00002248 // User error - caller will issue diagnostics.
2249 if (!rec)
2250 return;
Steve Naroff9d12c902007-10-15 14:41:52 +00002251 IdStructType = rec;
2252}
2253
Ted Kremenek42730c52008-01-07 19:49:32 +00002254void ASTContext::setObjCSelType(TypedefDecl *TD)
Fariborz Jahanianf807c202007-10-16 20:40:23 +00002255{
Ted Kremenek42730c52008-01-07 19:49:32 +00002256 ObjCSelType = getTypedefType(TD);
Fariborz Jahanianf807c202007-10-16 20:40:23 +00002257
2258 // typedef struct objc_selector *SEL;
2259 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType();
Fariborz Jahaniande939672009-01-16 19:58:32 +00002260 if (!ptr)
2261 return;
Fariborz Jahanianf807c202007-10-16 20:40:23 +00002262 const RecordType *rec = ptr->getPointeeType()->getAsStructureType();
Fariborz Jahaniande939672009-01-16 19:58:32 +00002263 if (!rec)
2264 return;
Fariborz Jahanianf807c202007-10-16 20:40:23 +00002265 SelStructType = rec;
2266}
2267
Ted Kremenek42730c52008-01-07 19:49:32 +00002268void ASTContext::setObjCProtoType(QualType QT)
Fariborz Jahanianb391e6e2007-10-17 16:58:11 +00002269{
Ted Kremenek42730c52008-01-07 19:49:32 +00002270 ObjCProtoType = QT;
Fariborz Jahanianb391e6e2007-10-17 16:58:11 +00002271}
2272
Ted Kremenek42730c52008-01-07 19:49:32 +00002273void ASTContext::setObjCClassType(TypedefDecl *TD)
Anders Carlsson7f23e3d2007-10-31 02:53:19 +00002274{
Ted Kremenek42730c52008-01-07 19:49:32 +00002275 ObjCClassType = getTypedefType(TD);
Anders Carlsson7f23e3d2007-10-31 02:53:19 +00002276
2277 // typedef struct objc_class *Class;
2278 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType();
2279 assert(ptr && "'Class' incorrectly typed");
2280 const RecordType *rec = ptr->getPointeeType()->getAsStructureType();
2281 assert(rec && "'Class' incorrectly typed");
2282 ClassStructType = rec;
2283}
2284
Ted Kremenek42730c52008-01-07 19:49:32 +00002285void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) {
2286 assert(ObjCConstantStringType.isNull() &&
Steve Narofff2e30312007-10-15 23:35:17 +00002287 "'NSConstantString' type already set!");
2288
Ted Kremenek42730c52008-01-07 19:49:32 +00002289 ObjCConstantStringType = getObjCInterfaceType(Decl);
Steve Narofff2e30312007-10-15 23:35:17 +00002290}
2291
Douglas Gregorc6507e42008-11-03 14:12:49 +00002292/// getFromTargetType - Given one of the integer types provided by
Douglas Gregorbb66b412008-11-03 15:57:00 +00002293/// TargetInfo, produce the corresponding type. The unsigned @p Type
2294/// is actually a value of type @c TargetInfo::IntType.
2295QualType ASTContext::getFromTargetType(unsigned Type) const {
Douglas Gregorc6507e42008-11-03 14:12:49 +00002296 switch (Type) {
2297 case TargetInfo::NoInt: return QualType();
2298 case TargetInfo::SignedShort: return ShortTy;
2299 case TargetInfo::UnsignedShort: return UnsignedShortTy;
2300 case TargetInfo::SignedInt: return IntTy;
2301 case TargetInfo::UnsignedInt: return UnsignedIntTy;
2302 case TargetInfo::SignedLong: return LongTy;
2303 case TargetInfo::UnsignedLong: return UnsignedLongTy;
2304 case TargetInfo::SignedLongLong: return LongLongTy;
2305 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy;
2306 }
2307
2308 assert(false && "Unhandled TargetInfo::IntType value");
Daniel Dunbar7b0dcc22008-11-11 01:16:00 +00002309 return QualType();
Douglas Gregorc6507e42008-11-03 14:12:49 +00002310}
Ted Kremenek118930e2008-07-24 23:58:27 +00002311
2312//===----------------------------------------------------------------------===//
2313// Type Predicates.
2314//===----------------------------------------------------------------------===//
2315
Fariborz Jahanian82f54962009-01-13 23:34:40 +00002316/// isObjCNSObjectType - Return true if this is an NSObject object using
2317/// NSObject attribute on a c-style pointer type.
2318/// FIXME - Make it work directly on types.
2319///
2320bool ASTContext::isObjCNSObjectType(QualType Ty) const {
2321 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) {
2322 if (TypedefDecl *TD = TDT->getDecl())
2323 if (TD->getAttr<ObjCNSObjectAttr>())
2324 return true;
2325 }
2326 return false;
2327}
2328
Ted Kremenek118930e2008-07-24 23:58:27 +00002329/// isObjCObjectPointerType - Returns true if type is an Objective-C pointer
2330/// to an object type. This includes "id" and "Class" (two 'special' pointers
2331/// to struct), Interface* (pointer to ObjCInterfaceType) and id<P> (qualified
2332/// ID type).
2333bool ASTContext::isObjCObjectPointerType(QualType Ty) const {
2334 if (Ty->isObjCQualifiedIdType())
2335 return true;
2336
Steve Naroffd9e00802008-10-21 18:24:04 +00002337 // Blocks are objects.
2338 if (Ty->isBlockPointerType())
2339 return true;
2340
2341 // All other object types are pointers.
Ted Kremenek118930e2008-07-24 23:58:27 +00002342 if (!Ty->isPointerType())
2343 return false;
2344
2345 // Check to see if this is 'id' or 'Class', both of which are typedefs for
2346 // pointer types. This looks for the typedef specifically, not for the
2347 // underlying type.
2348 if (Ty == getObjCIdType() || Ty == getObjCClassType())
2349 return true;
2350
2351 // If this a pointer to an interface (e.g. NSString*), it is ok.
Fariborz Jahanian82f54962009-01-13 23:34:40 +00002352 if (Ty->getAsPointerType()->getPointeeType()->isObjCInterfaceType())
2353 return true;
2354
2355 // If is has NSObject attribute, OK as well.
2356 return isObjCNSObjectType(Ty);
Ted Kremenek118930e2008-07-24 23:58:27 +00002357}
2358
Chris Lattner6ff358b2008-04-07 06:51:04 +00002359//===----------------------------------------------------------------------===//
2360// Type Compatibility Testing
2361//===----------------------------------------------------------------------===//
Chris Lattner5003e8b2007-11-01 05:03:41 +00002362
Steve Naroff3454b6c2008-09-04 15:10:53 +00002363/// typesAreBlockCompatible - This routine is called when comparing two
Steve Naroffd6163f32008-09-05 22:11:13 +00002364/// block types. Types must be strictly compatible here. For example,
2365/// C unfortunately doesn't produce an error for the following:
2366///
2367/// int (*emptyArgFunc)();
2368/// int (*intArgList)(int) = emptyArgFunc;
2369///
2370/// For blocks, we will produce an error for the following (similar to C++):
2371///
2372/// int (^emptyArgBlock)();
2373/// int (^intArgBlock)(int) = emptyArgBlock;
2374///
2375/// FIXME: When the dust settles on this integration, fold this into mergeTypes.
2376///
Steve Naroff3454b6c2008-09-04 15:10:53 +00002377bool ASTContext::typesAreBlockCompatible(QualType lhs, QualType rhs) {
Steve Naroff09e1b9e2008-12-10 17:49:55 +00002378 const FunctionType *lbase = lhs->getAsFunctionType();
2379 const FunctionType *rbase = rhs->getAsFunctionType();
2380 const FunctionTypeProto *lproto = dyn_cast<FunctionTypeProto>(lbase);
2381 const FunctionTypeProto *rproto = dyn_cast<FunctionTypeProto>(rbase);
2382 if (lproto && rproto)
2383 return !mergeTypes(lhs, rhs).isNull();
2384 return false;
Steve Naroff3454b6c2008-09-04 15:10:53 +00002385}
2386
Chris Lattner6ff358b2008-04-07 06:51:04 +00002387/// areCompatVectorTypes - Return true if the two specified vector types are
2388/// compatible.
2389static bool areCompatVectorTypes(const VectorType *LHS,
2390 const VectorType *RHS) {
2391 assert(LHS->isCanonical() && RHS->isCanonical());
2392 return LHS->getElementType() == RHS->getElementType() &&
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002393 LHS->getNumElements() == RHS->getNumElements();
Chris Lattner6ff358b2008-04-07 06:51:04 +00002394}
2395
Eli Friedman0d9549b2008-08-22 00:56:42 +00002396/// canAssignObjCInterfaces - Return true if the two interface types are
Chris Lattner6ff358b2008-04-07 06:51:04 +00002397/// compatible for assignment from RHS to LHS. This handles validation of any
2398/// protocol qualifiers on the LHS or RHS.
2399///
Eli Friedman0d9549b2008-08-22 00:56:42 +00002400bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS,
2401 const ObjCInterfaceType *RHS) {
Chris Lattner6ff358b2008-04-07 06:51:04 +00002402 // Verify that the base decls are compatible: the RHS must be a subclass of
2403 // the LHS.
2404 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl()))
2405 return false;
2406
2407 // RHS must have a superset of the protocols in the LHS. If the LHS is not
2408 // protocol qualified at all, then we are good.
2409 if (!isa<ObjCQualifiedInterfaceType>(LHS))
2410 return true;
2411
2412 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it
2413 // isn't a superset.
2414 if (!isa<ObjCQualifiedInterfaceType>(RHS))
2415 return true; // FIXME: should return false!
2416
2417 // Finally, we must have two protocol-qualified interfaces.
2418 const ObjCQualifiedInterfaceType *LHSP =cast<ObjCQualifiedInterfaceType>(LHS);
2419 const ObjCQualifiedInterfaceType *RHSP =cast<ObjCQualifiedInterfaceType>(RHS);
2420 ObjCQualifiedInterfaceType::qual_iterator LHSPI = LHSP->qual_begin();
2421 ObjCQualifiedInterfaceType::qual_iterator LHSPE = LHSP->qual_end();
2422 ObjCQualifiedInterfaceType::qual_iterator RHSPI = RHSP->qual_begin();
2423 ObjCQualifiedInterfaceType::qual_iterator RHSPE = RHSP->qual_end();
2424
2425 // All protocols in LHS must have a presence in RHS. Since the protocol lists
2426 // are both sorted alphabetically and have no duplicates, we can scan RHS and
2427 // LHS in a single parallel scan until we run out of elements in LHS.
2428 assert(LHSPI != LHSPE && "Empty LHS protocol list?");
2429 ObjCProtocolDecl *LHSProto = *LHSPI;
2430
2431 while (RHSPI != RHSPE) {
2432 ObjCProtocolDecl *RHSProto = *RHSPI++;
2433 // If the RHS has a protocol that the LHS doesn't, ignore it.
2434 if (RHSProto != LHSProto)
2435 continue;
2436
2437 // Otherwise, the RHS does have this element.
2438 ++LHSPI;
2439 if (LHSPI == LHSPE)
2440 return true; // All protocols in LHS exist in RHS.
2441
2442 LHSProto = *LHSPI;
2443 }
2444
2445 // If we got here, we didn't find one of the LHS's protocols in the RHS list.
2446 return false;
2447}
2448
Steve Naroff17c03822009-02-12 17:52:19 +00002449bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) {
2450 // get the "pointed to" types
2451 const PointerType *LHSPT = LHS->getAsPointerType();
2452 const PointerType *RHSPT = RHS->getAsPointerType();
2453
2454 if (!LHSPT || !RHSPT)
2455 return false;
2456
2457 QualType lhptee = LHSPT->getPointeeType();
2458 QualType rhptee = RHSPT->getPointeeType();
2459 const ObjCInterfaceType* LHSIface = lhptee->getAsObjCInterfaceType();
2460 const ObjCInterfaceType* RHSIface = rhptee->getAsObjCInterfaceType();
2461 // ID acts sort of like void* for ObjC interfaces
2462 if (LHSIface && isObjCIdStructType(rhptee))
2463 return true;
2464 if (RHSIface && isObjCIdStructType(lhptee))
2465 return true;
2466 if (!LHSIface || !RHSIface)
2467 return false;
2468 return canAssignObjCInterfaces(LHSIface, RHSIface) ||
2469 canAssignObjCInterfaces(RHSIface, LHSIface);
2470}
2471
Steve Naroff85f0dc52007-10-15 20:41:53 +00002472/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible,
2473/// both shall have the identically qualified version of a compatible type.
2474/// C99 6.2.7p1: Two types have compatible types if their types are the
2475/// same. See 6.7.[2,3,5] for additional rules.
Eli Friedman0d9549b2008-08-22 00:56:42 +00002476bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) {
2477 return !mergeTypes(LHS, RHS).isNull();
2478}
2479
2480QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) {
2481 const FunctionType *lbase = lhs->getAsFunctionType();
2482 const FunctionType *rbase = rhs->getAsFunctionType();
2483 const FunctionTypeProto *lproto = dyn_cast<FunctionTypeProto>(lbase);
2484 const FunctionTypeProto *rproto = dyn_cast<FunctionTypeProto>(rbase);
2485 bool allLTypes = true;
2486 bool allRTypes = true;
2487
2488 // Check return type
2489 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType());
2490 if (retType.isNull()) return QualType();
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002491 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType()))
2492 allLTypes = false;
2493 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType()))
2494 allRTypes = false;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002495
2496 if (lproto && rproto) { // two C99 style function prototypes
2497 unsigned lproto_nargs = lproto->getNumArgs();
2498 unsigned rproto_nargs = rproto->getNumArgs();
2499
2500 // Compatible functions must have the same number of arguments
2501 if (lproto_nargs != rproto_nargs)
2502 return QualType();
2503
2504 // Variadic and non-variadic functions aren't compatible
2505 if (lproto->isVariadic() != rproto->isVariadic())
2506 return QualType();
2507
Argiris Kirtzidis65b99642008-10-26 16:43:14 +00002508 if (lproto->getTypeQuals() != rproto->getTypeQuals())
2509 return QualType();
2510
Eli Friedman0d9549b2008-08-22 00:56:42 +00002511 // Check argument compatibility
2512 llvm::SmallVector<QualType, 10> types;
2513 for (unsigned i = 0; i < lproto_nargs; i++) {
2514 QualType largtype = lproto->getArgType(i).getUnqualifiedType();
2515 QualType rargtype = rproto->getArgType(i).getUnqualifiedType();
2516 QualType argtype = mergeTypes(largtype, rargtype);
2517 if (argtype.isNull()) return QualType();
2518 types.push_back(argtype);
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002519 if (getCanonicalType(argtype) != getCanonicalType(largtype))
2520 allLTypes = false;
2521 if (getCanonicalType(argtype) != getCanonicalType(rargtype))
2522 allRTypes = false;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002523 }
2524 if (allLTypes) return lhs;
2525 if (allRTypes) return rhs;
2526 return getFunctionType(retType, types.begin(), types.size(),
Argiris Kirtzidis65b99642008-10-26 16:43:14 +00002527 lproto->isVariadic(), lproto->getTypeQuals());
Eli Friedman0d9549b2008-08-22 00:56:42 +00002528 }
2529
2530 if (lproto) allRTypes = false;
2531 if (rproto) allLTypes = false;
2532
2533 const FunctionTypeProto *proto = lproto ? lproto : rproto;
2534 if (proto) {
2535 if (proto->isVariadic()) return QualType();
2536 // Check that the types are compatible with the types that
2537 // would result from default argument promotions (C99 6.7.5.3p15).
2538 // The only types actually affected are promotable integer
2539 // types and floats, which would be passed as a different
2540 // type depending on whether the prototype is visible.
2541 unsigned proto_nargs = proto->getNumArgs();
2542 for (unsigned i = 0; i < proto_nargs; ++i) {
2543 QualType argTy = proto->getArgType(i);
2544 if (argTy->isPromotableIntegerType() ||
2545 getCanonicalType(argTy).getUnqualifiedType() == FloatTy)
2546 return QualType();
2547 }
2548
2549 if (allLTypes) return lhs;
2550 if (allRTypes) return rhs;
2551 return getFunctionType(retType, proto->arg_type_begin(),
Argiris Kirtzidis65b99642008-10-26 16:43:14 +00002552 proto->getNumArgs(), lproto->isVariadic(),
2553 lproto->getTypeQuals());
Eli Friedman0d9549b2008-08-22 00:56:42 +00002554 }
2555
2556 if (allLTypes) return lhs;
2557 if (allRTypes) return rhs;
2558 return getFunctionTypeNoProto(retType);
2559}
2560
2561QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) {
Bill Wendling6a9d8542007-12-03 07:33:35 +00002562 // C++ [expr]: If an expression initially has the type "reference to T", the
2563 // type is adjusted to "T" prior to any further analysis, the expression
2564 // designates the object or function denoted by the reference, and the
2565 // expression is an lvalue.
Eli Friedman0d9549b2008-08-22 00:56:42 +00002566 // FIXME: C++ shouldn't be going through here! The rules are different
2567 // enough that they should be handled separately.
2568 if (const ReferenceType *RT = LHS->getAsReferenceType())
Chris Lattner855fed42008-04-07 04:07:56 +00002569 LHS = RT->getPointeeType();
Eli Friedman0d9549b2008-08-22 00:56:42 +00002570 if (const ReferenceType *RT = RHS->getAsReferenceType())
Chris Lattner855fed42008-04-07 04:07:56 +00002571 RHS = RT->getPointeeType();
Chris Lattnerd47d6042008-04-07 05:37:56 +00002572
Eli Friedman0d9549b2008-08-22 00:56:42 +00002573 QualType LHSCan = getCanonicalType(LHS),
2574 RHSCan = getCanonicalType(RHS);
2575
2576 // If two types are identical, they are compatible.
2577 if (LHSCan == RHSCan)
2578 return LHS;
2579
2580 // If the qualifiers are different, the types aren't compatible
2581 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers() ||
2582 LHSCan.getAddressSpace() != RHSCan.getAddressSpace())
2583 return QualType();
2584
2585 Type::TypeClass LHSClass = LHSCan->getTypeClass();
2586 Type::TypeClass RHSClass = RHSCan->getTypeClass();
2587
Chris Lattnerc38d4522008-01-14 05:45:46 +00002588 // We want to consider the two function types to be the same for these
2589 // comparisons, just force one to the other.
2590 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto;
2591 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto;
Eli Friedman398837e2008-02-12 08:23:06 +00002592
2593 // Same as above for arrays
Chris Lattnerb5709e22008-04-07 05:43:21 +00002594 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray)
2595 LHSClass = Type::ConstantArray;
2596 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray)
2597 RHSClass = Type::ConstantArray;
Steve Naroff85f0dc52007-10-15 20:41:53 +00002598
Nate Begemanaf6ed502008-04-18 23:10:10 +00002599 // Canonicalize ExtVector -> Vector.
2600 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector;
2601 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector;
Chris Lattnerb5709e22008-04-07 05:43:21 +00002602
Chris Lattner7cdcb252008-04-07 06:38:24 +00002603 // Consider qualified interfaces and interfaces the same.
2604 if (LHSClass == Type::ObjCQualifiedInterface) LHSClass = Type::ObjCInterface;
2605 if (RHSClass == Type::ObjCQualifiedInterface) RHSClass = Type::ObjCInterface;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002606
Chris Lattnerb5709e22008-04-07 05:43:21 +00002607 // If the canonical type classes don't match.
Chris Lattnerc38d4522008-01-14 05:45:46 +00002608 if (LHSClass != RHSClass) {
Steve Naroff28ceff72008-12-10 22:14:21 +00002609 // ID is compatible with all qualified id types.
2610 if (LHS->isObjCQualifiedIdType()) {
2611 if (const PointerType *PT = RHS->getAsPointerType()) {
2612 QualType pType = PT->getPointeeType();
Steve Naroff17c03822009-02-12 17:52:19 +00002613 if (isObjCIdStructType(pType))
Steve Naroff28ceff72008-12-10 22:14:21 +00002614 return LHS;
2615 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true).
2616 // Unfortunately, this API is part of Sema (which we don't have access
2617 // to. Need to refactor. The following check is insufficient, since we
2618 // need to make sure the class implements the protocol.
2619 if (pType->isObjCInterfaceType())
2620 return LHS;
2621 }
2622 }
2623 if (RHS->isObjCQualifiedIdType()) {
2624 if (const PointerType *PT = LHS->getAsPointerType()) {
2625 QualType pType = PT->getPointeeType();
Steve Naroff17c03822009-02-12 17:52:19 +00002626 if (isObjCIdStructType(pType))
Steve Naroff28ceff72008-12-10 22:14:21 +00002627 return RHS;
2628 // FIXME: need to use ObjCQualifiedIdTypesAreCompatible(LHS, RHS, true).
2629 // Unfortunately, this API is part of Sema (which we don't have access
2630 // to. Need to refactor. The following check is insufficient, since we
2631 // need to make sure the class implements the protocol.
2632 if (pType->isObjCInterfaceType())
2633 return RHS;
2634 }
2635 }
Chris Lattnerc38d4522008-01-14 05:45:46 +00002636 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char,
2637 // a signed integer type, or an unsigned integer type.
Eli Friedman0d9549b2008-08-22 00:56:42 +00002638 if (const EnumType* ETy = LHS->getAsEnumType()) {
2639 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType())
2640 return RHS;
Eli Friedmanad6c06c2008-02-12 08:46:17 +00002641 }
Eli Friedman0d9549b2008-08-22 00:56:42 +00002642 if (const EnumType* ETy = RHS->getAsEnumType()) {
2643 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType())
2644 return LHS;
Eli Friedmanad6c06c2008-02-12 08:46:17 +00002645 }
Chris Lattnerc38d4522008-01-14 05:45:46 +00002646
Eli Friedman0d9549b2008-08-22 00:56:42 +00002647 return QualType();
Steve Naroff85f0dc52007-10-15 20:41:53 +00002648 }
Eli Friedman0d9549b2008-08-22 00:56:42 +00002649
Steve Naroffc88babe2008-01-09 22:43:08 +00002650 // The canonical type classes match.
Chris Lattnerc38d4522008-01-14 05:45:46 +00002651 switch (LHSClass) {
Chris Lattnerc38d4522008-01-14 05:45:46 +00002652 case Type::Pointer:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002653 {
2654 // Merge two pointer types, while trying to preserve typedef info
2655 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType();
2656 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType();
2657 QualType ResultType = mergeTypes(LHSPointee, RHSPointee);
2658 if (ResultType.isNull()) return QualType();
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002659 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType))
2660 return LHS;
2661 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType))
2662 return RHS;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002663 return getPointerType(ResultType);
2664 }
Steve Naroff09e1b9e2008-12-10 17:49:55 +00002665 case Type::BlockPointer:
2666 {
2667 // Merge two block pointer types, while trying to preserve typedef info
2668 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType();
2669 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType();
2670 QualType ResultType = mergeTypes(LHSPointee, RHSPointee);
2671 if (ResultType.isNull()) return QualType();
2672 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType))
2673 return LHS;
2674 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType))
2675 return RHS;
2676 return getBlockPointerType(ResultType);
2677 }
Chris Lattnerc38d4522008-01-14 05:45:46 +00002678 case Type::ConstantArray:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002679 {
2680 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS);
2681 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS);
2682 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize())
2683 return QualType();
2684
2685 QualType LHSElem = getAsArrayType(LHS)->getElementType();
2686 QualType RHSElem = getAsArrayType(RHS)->getElementType();
2687 QualType ResultType = mergeTypes(LHSElem, RHSElem);
2688 if (ResultType.isNull()) return QualType();
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002689 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType))
2690 return LHS;
2691 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType))
2692 return RHS;
Eli Friedmanc91a3f32008-08-22 01:48:21 +00002693 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(),
2694 ArrayType::ArraySizeModifier(), 0);
2695 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(),
2696 ArrayType::ArraySizeModifier(), 0);
Eli Friedman0d9549b2008-08-22 00:56:42 +00002697 const VariableArrayType* LVAT = getAsVariableArrayType(LHS);
2698 const VariableArrayType* RVAT = getAsVariableArrayType(RHS);
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002699 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType))
2700 return LHS;
2701 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType))
2702 return RHS;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002703 if (LVAT) {
2704 // FIXME: This isn't correct! But tricky to implement because
2705 // the array's size has to be the size of LHS, but the type
2706 // has to be different.
2707 return LHS;
2708 }
2709 if (RVAT) {
2710 // FIXME: This isn't correct! But tricky to implement because
2711 // the array's size has to be the size of RHS, but the type
2712 // has to be different.
2713 return RHS;
2714 }
Eli Friedmanc91a3f32008-08-22 01:48:21 +00002715 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS;
2716 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS;
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002717 return getIncompleteArrayType(ResultType, ArrayType::ArraySizeModifier(),0);
Eli Friedman0d9549b2008-08-22 00:56:42 +00002718 }
Chris Lattnerc38d4522008-01-14 05:45:46 +00002719 case Type::FunctionNoProto:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002720 return mergeFunctionTypes(LHS, RHS);
2721 case Type::Tagged:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002722 // FIXME: Why are these compatible?
Steve Naroff17c03822009-02-12 17:52:19 +00002723 if (isObjCIdStructType(LHS) && isObjCClassStructType(RHS)) return LHS;
2724 if (isObjCClassStructType(LHS) && isObjCIdStructType(RHS)) return LHS;
Eli Friedman0d9549b2008-08-22 00:56:42 +00002725 return QualType();
Chris Lattnerc38d4522008-01-14 05:45:46 +00002726 case Type::Builtin:
Chris Lattnerd1240fa2008-04-07 05:55:38 +00002727 // Only exactly equal builtin types are compatible, which is tested above.
Eli Friedman0d9549b2008-08-22 00:56:42 +00002728 return QualType();
Daniel Dunbar457f33d2009-01-28 21:22:12 +00002729 case Type::Complex:
2730 // Distinct complex types are incompatible.
2731 return QualType();
Chris Lattnerd1240fa2008-04-07 05:55:38 +00002732 case Type::Vector:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002733 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType()))
2734 return LHS;
Chris Lattner2fda0ed2008-10-05 17:34:18 +00002735 return QualType();
Chris Lattnerc38d4522008-01-14 05:45:46 +00002736 case Type::ObjCInterface:
Eli Friedman0d9549b2008-08-22 00:56:42 +00002737 // Distinct ObjC interfaces are not compatible; see canAssignObjCInterfaces
2738 // for checking assignment/comparison safety
2739 return QualType();
Steve Naroff28ceff72008-12-10 22:14:21 +00002740 case Type::ObjCQualifiedId:
2741 // Distinct qualified id's are not compatible.
2742 return QualType();
Chris Lattnerc38d4522008-01-14 05:45:46 +00002743 default:
2744 assert(0 && "unexpected type");
Eli Friedman0d9549b2008-08-22 00:56:42 +00002745 return QualType();
Steve Naroff85f0dc52007-10-15 20:41:53 +00002746 }
Steve Naroff85f0dc52007-10-15 20:41:53 +00002747}
Ted Kremenek738e6c02007-10-31 17:10:13 +00002748
Chris Lattner1d78a862008-04-07 07:01:58 +00002749//===----------------------------------------------------------------------===//
Eli Friedman0832dbc2008-06-28 06:23:08 +00002750// Integer Predicates
2751//===----------------------------------------------------------------------===//
Chris Lattner74f67012009-01-16 07:15:35 +00002752
Eli Friedman0832dbc2008-06-28 06:23:08 +00002753unsigned ASTContext::getIntWidth(QualType T) {
2754 if (T == BoolTy)
2755 return 1;
Eli Friedmanff3fcdf2009-02-13 02:31:07 +00002756 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) {
2757 return FWIT->getWidth();
2758 }
2759 // For builtin types, just use the standard type sizing method
Eli Friedman0832dbc2008-06-28 06:23:08 +00002760 return (unsigned)getTypeSize(T);
2761}
2762
2763QualType ASTContext::getCorrespondingUnsignedType(QualType T) {
2764 assert(T->isSignedIntegerType() && "Unexpected type");
2765 if (const EnumType* ETy = T->getAsEnumType())
2766 T = ETy->getDecl()->getIntegerType();
2767 const BuiltinType* BTy = T->getAsBuiltinType();
2768 assert (BTy && "Unexpected signed integer type");
2769 switch (BTy->getKind()) {
2770 case BuiltinType::Char_S:
2771 case BuiltinType::SChar:
2772 return UnsignedCharTy;
2773 case BuiltinType::Short:
2774 return UnsignedShortTy;
2775 case BuiltinType::Int:
2776 return UnsignedIntTy;
2777 case BuiltinType::Long:
2778 return UnsignedLongTy;
2779 case BuiltinType::LongLong:
2780 return UnsignedLongLongTy;
2781 default:
2782 assert(0 && "Unexpected signed integer type");
2783 return QualType();
2784 }
2785}
2786
2787
2788//===----------------------------------------------------------------------===//
Chris Lattner1d78a862008-04-07 07:01:58 +00002789// Serialization Support
2790//===----------------------------------------------------------------------===//
2791
Ted Kremenek738e6c02007-10-31 17:10:13 +00002792/// Emit - Serialize an ASTContext object to Bitcode.
2793void ASTContext::Emit(llvm::Serializer& S) const {
Ted Kremenek842126e2008-06-04 15:55:15 +00002794 S.Emit(LangOpts);
Ted Kremenek9af4d5c2007-10-31 20:00:03 +00002795 S.EmitRef(SourceMgr);
2796 S.EmitRef(Target);
2797 S.EmitRef(Idents);
2798 S.EmitRef(Selectors);
Ted Kremenek738e6c02007-10-31 17:10:13 +00002799
Ted Kremenek68228a92007-10-31 22:44:07 +00002800 // Emit the size of the type vector so that we can reserve that size
2801 // when we reconstitute the ASTContext object.
Ted Kremenek0199d9f2007-11-06 22:26:16 +00002802 S.EmitInt(Types.size());
2803
Ted Kremenek034a78c2007-11-13 22:02:55 +00002804 for (std::vector<Type*>::const_iterator I=Types.begin(), E=Types.end();
2805 I!=E;++I)
2806 (*I)->Emit(S);
Ted Kremenek0199d9f2007-11-06 22:26:16 +00002807
Argiris Kirtzidisd3586002008-04-17 14:40:12 +00002808 S.EmitOwnedPtr(TUDecl);
2809
Ted Kremeneke1fed7a2007-11-01 18:11:32 +00002810 // FIXME: S.EmitOwnedPtr(CFConstantStringTypeDecl);
Ted Kremenek738e6c02007-10-31 17:10:13 +00002811}
2812
Ted Kremenekacba3612007-11-13 00:25:37 +00002813ASTContext* ASTContext::Create(llvm::Deserializer& D) {
Ted Kremenek842126e2008-06-04 15:55:15 +00002814
2815 // Read the language options.
2816 LangOptions LOpts;
2817 LOpts.Read(D);
2818
Ted Kremenek68228a92007-10-31 22:44:07 +00002819 SourceManager &SM = D.ReadRef<SourceManager>();
2820 TargetInfo &t = D.ReadRef<TargetInfo>();
2821 IdentifierTable &idents = D.ReadRef<IdentifierTable>();
2822 SelectorTable &sels = D.ReadRef<SelectorTable>();
Chris Lattnereee57c02008-04-04 06:12:32 +00002823
Ted Kremenek68228a92007-10-31 22:44:07 +00002824 unsigned size_reserve = D.ReadInt();
2825
Douglas Gregor24afd4a2008-11-17 14:58:09 +00002826 ASTContext* A = new ASTContext(LOpts, SM, t, idents, sels,
2827 size_reserve);
Ted Kremenek68228a92007-10-31 22:44:07 +00002828
Ted Kremenek034a78c2007-11-13 22:02:55 +00002829 for (unsigned i = 0; i < size_reserve; ++i)
2830 Type::Create(*A,i,D);
Chris Lattnereee57c02008-04-04 06:12:32 +00002831
Argiris Kirtzidisd3586002008-04-17 14:40:12 +00002832 A->TUDecl = cast<TranslationUnitDecl>(D.ReadOwnedPtr<Decl>(*A));
2833
Ted Kremeneke1fed7a2007-11-01 18:11:32 +00002834 // FIXME: A->CFConstantStringTypeDecl = D.ReadOwnedPtr<RecordDecl>();
Ted Kremenek68228a92007-10-31 22:44:07 +00002835
2836 return A;
2837}