1 //===--- ASTCommon.cpp - Common stuff for ASTReader/ASTWriter----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines common functions that both ASTReader and ASTWriter use.
12 //===----------------------------------------------------------------------===//
14 #include "ASTCommon.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/Basic/IdentifierTable.h"
18 #include "clang/Serialization/ASTDeserializationListener.h"
19 #include "llvm/ADT/StringExtras.h"
21 using namespace clang;
23 // Give ASTDeserializationListener's VTable a home.
24 ASTDeserializationListener::~ASTDeserializationListener() { }
26 serialization::TypeIdx
27 serialization::TypeIdxFromBuiltin(const BuiltinType *BT) {
29 switch (BT->getKind()) {
30 case BuiltinType::Void:
31 ID = PREDEF_TYPE_VOID_ID;
33 case BuiltinType::Bool:
34 ID = PREDEF_TYPE_BOOL_ID;
36 case BuiltinType::Char_U:
37 ID = PREDEF_TYPE_CHAR_U_ID;
39 case BuiltinType::UChar:
40 ID = PREDEF_TYPE_UCHAR_ID;
42 case BuiltinType::UShort:
43 ID = PREDEF_TYPE_USHORT_ID;
45 case BuiltinType::UInt:
46 ID = PREDEF_TYPE_UINT_ID;
48 case BuiltinType::ULong:
49 ID = PREDEF_TYPE_ULONG_ID;
51 case BuiltinType::ULongLong:
52 ID = PREDEF_TYPE_ULONGLONG_ID;
54 case BuiltinType::UInt128:
55 ID = PREDEF_TYPE_UINT128_ID;
57 case BuiltinType::Char_S:
58 ID = PREDEF_TYPE_CHAR_S_ID;
60 case BuiltinType::SChar:
61 ID = PREDEF_TYPE_SCHAR_ID;
63 case BuiltinType::WChar_S:
64 case BuiltinType::WChar_U:
65 ID = PREDEF_TYPE_WCHAR_ID;
67 case BuiltinType::Short:
68 ID = PREDEF_TYPE_SHORT_ID;
70 case BuiltinType::Int:
71 ID = PREDEF_TYPE_INT_ID;
73 case BuiltinType::Long:
74 ID = PREDEF_TYPE_LONG_ID;
76 case BuiltinType::LongLong:
77 ID = PREDEF_TYPE_LONGLONG_ID;
79 case BuiltinType::Int128:
80 ID = PREDEF_TYPE_INT128_ID;
82 case BuiltinType::Half:
83 ID = PREDEF_TYPE_HALF_ID;
85 case BuiltinType::Float:
86 ID = PREDEF_TYPE_FLOAT_ID;
88 case BuiltinType::Double:
89 ID = PREDEF_TYPE_DOUBLE_ID;
91 case BuiltinType::LongDouble:
92 ID = PREDEF_TYPE_LONGDOUBLE_ID;
94 case BuiltinType::Float16:
95 ID = PREDEF_TYPE_FLOAT16_ID;
97 case BuiltinType::Float128:
98 ID = PREDEF_TYPE_FLOAT128_ID;
100 case BuiltinType::NullPtr:
101 ID = PREDEF_TYPE_NULLPTR_ID;
103 case BuiltinType::Char16:
104 ID = PREDEF_TYPE_CHAR16_ID;
106 case BuiltinType::Char32:
107 ID = PREDEF_TYPE_CHAR32_ID;
109 case BuiltinType::Overload:
110 ID = PREDEF_TYPE_OVERLOAD_ID;
112 case BuiltinType::BoundMember:
113 ID = PREDEF_TYPE_BOUND_MEMBER;
115 case BuiltinType::PseudoObject:
116 ID = PREDEF_TYPE_PSEUDO_OBJECT;
118 case BuiltinType::Dependent:
119 ID = PREDEF_TYPE_DEPENDENT_ID;
121 case BuiltinType::UnknownAny:
122 ID = PREDEF_TYPE_UNKNOWN_ANY;
124 case BuiltinType::ARCUnbridgedCast:
125 ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST;
127 case BuiltinType::ObjCId:
128 ID = PREDEF_TYPE_OBJC_ID;
130 case BuiltinType::ObjCClass:
131 ID = PREDEF_TYPE_OBJC_CLASS;
133 case BuiltinType::ObjCSel:
134 ID = PREDEF_TYPE_OBJC_SEL;
136 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
137 case BuiltinType::Id: \
138 ID = PREDEF_TYPE_##Id##_ID; \
140 #include "clang/Basic/OpenCLImageTypes.def"
141 case BuiltinType::OCLSampler:
142 ID = PREDEF_TYPE_SAMPLER_ID;
144 case BuiltinType::OCLEvent:
145 ID = PREDEF_TYPE_EVENT_ID;
147 case BuiltinType::OCLClkEvent:
148 ID = PREDEF_TYPE_CLK_EVENT_ID;
150 case BuiltinType::OCLQueue:
151 ID = PREDEF_TYPE_QUEUE_ID;
153 case BuiltinType::OCLReserveID:
154 ID = PREDEF_TYPE_RESERVE_ID_ID;
156 case BuiltinType::BuiltinFn:
157 ID = PREDEF_TYPE_BUILTIN_FN;
159 case BuiltinType::OMPArraySection:
160 ID = PREDEF_TYPE_OMP_ARRAY_SECTION;
167 unsigned serialization::ComputeHash(Selector Sel) {
168 unsigned N = Sel.getNumArgs();
172 for (unsigned I = 0; I != N; ++I)
173 if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
174 R = llvm::HashString(II->getName(), R);
179 serialization::getDefinitiveDeclContext(const DeclContext *DC) {
180 switch (DC->getDeclKind()) {
181 // These entities may have multiple definitions.
182 case Decl::TranslationUnit:
183 case Decl::ExternCContext:
184 case Decl::Namespace:
185 case Decl::LinkageSpec:
189 // C/C++ tag types can only be defined in one place.
192 if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition())
196 // FIXME: These can be defined in one place... except special member
197 // functions and out-of-line definitions.
198 case Decl::CXXRecord:
199 case Decl::ClassTemplateSpecialization:
200 case Decl::ClassTemplatePartialSpecialization:
203 // Each function, method, and block declaration is its own DeclContext.
205 case Decl::CXXMethod:
206 case Decl::CXXConstructor:
207 case Decl::CXXDestructor:
208 case Decl::CXXConversion:
209 case Decl::ObjCMethod:
212 // Objective C categories, category implementations, and class
213 // implementations can only be defined in one place.
214 case Decl::ObjCCategory:
215 case Decl::ObjCCategoryImpl:
216 case Decl::ObjCImplementation:
219 case Decl::ObjCProtocol:
220 if (const ObjCProtocolDecl *Def
221 = cast<ObjCProtocolDecl>(DC)->getDefinition())
225 // FIXME: These are defined in one place, but properties in class extensions
226 // end up being back-patched into the main interface. See
227 // Sema::HandlePropertyInClassExtension for the offending code.
228 case Decl::ObjCInterface:
232 llvm_unreachable("Unhandled DeclContext in AST reader");
235 llvm_unreachable("Unhandled decl kind");
238 bool serialization::isRedeclarableDeclKind(unsigned Kind) {
239 switch (static_cast<Decl::Kind>(Kind)) {
240 case Decl::TranslationUnit:
241 case Decl::ExternCContext:
242 // Special case of a "merged" declaration.
245 case Decl::Namespace:
246 case Decl::NamespaceAlias:
248 case Decl::TypeAlias:
251 case Decl::CXXRecord:
252 case Decl::ClassTemplateSpecialization:
253 case Decl::ClassTemplatePartialSpecialization:
254 case Decl::VarTemplateSpecialization:
255 case Decl::VarTemplatePartialSpecialization:
257 case Decl::CXXDeductionGuide:
258 case Decl::CXXMethod:
259 case Decl::CXXConstructor:
260 case Decl::CXXDestructor:
261 case Decl::CXXConversion:
262 case Decl::UsingShadow:
263 case Decl::ConstructorUsingShadow:
265 case Decl::FunctionTemplate:
266 case Decl::ClassTemplate:
267 case Decl::VarTemplate:
268 case Decl::TypeAliasTemplate:
269 case Decl::ObjCProtocol:
270 case Decl::ObjCInterface:
274 // Never redeclarable.
275 case Decl::UsingDirective:
277 case Decl::UnresolvedUsingTypename:
278 case Decl::TemplateTypeParm:
279 case Decl::EnumConstant:
280 case Decl::UnresolvedUsingValue:
281 case Decl::IndirectField:
283 case Decl::MSProperty:
285 case Decl::ObjCAtDefsField:
286 case Decl::NonTypeTemplateParm:
287 case Decl::TemplateTemplateParm:
289 case Decl::UsingPack:
290 case Decl::ObjCMethod:
291 case Decl::ObjCCategory:
292 case Decl::ObjCCategoryImpl:
293 case Decl::ObjCImplementation:
294 case Decl::ObjCProperty:
295 case Decl::ObjCCompatibleAlias:
296 case Decl::LinkageSpec:
298 case Decl::ObjCPropertyImpl:
299 case Decl::PragmaComment:
300 case Decl::PragmaDetectMismatch:
301 case Decl::FileScopeAsm:
302 case Decl::AccessSpec:
304 case Decl::FriendTemplate:
305 case Decl::StaticAssert:
308 case Decl::ClassScopeFunctionSpecialization:
310 case Decl::OMPThreadPrivate:
311 case Decl::OMPCapturedExpr:
312 case Decl::OMPDeclareReduction:
313 case Decl::BuiltinTemplate:
314 case Decl::Decomposition:
318 // These indirectly derive from Redeclarable<T> but are not actually
320 case Decl::ImplicitParam:
322 case Decl::ObjCTypeParam:
326 llvm_unreachable("Unhandled declaration kind");
329 bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) {
330 // Friend declarations in dependent contexts aren't anonymous in the usual
331 // sense, but they cannot be found by name lookup in their semantic context
332 // (or indeed in any context), so we treat them as anonymous.
334 // This doesn't apply to friend tag decls; Sema makes those available to name
335 // lookup in the surrounding context.
336 if (D->getFriendObjectKind() &&
337 D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) {
338 // For function templates and class templates, the template is numbered and
340 if (auto *FD = dyn_cast<FunctionDecl>(D))
341 return !FD->getDescribedFunctionTemplate();
342 if (auto *RD = dyn_cast<CXXRecordDecl>(D))
343 return !RD->getDescribedClassTemplate();
347 // Otherwise, we only care about anonymous class members.
348 if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext()))
350 return isa<TagDecl>(D) || isa<FieldDecl>(D);