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/Support/DJB.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::ShortAccum:
95 ID = PREDEF_TYPE_SHORT_ACCUM_ID;
97 case BuiltinType::Accum:
98 ID = PREDEF_TYPE_ACCUM_ID;
100 case BuiltinType::LongAccum:
101 ID = PREDEF_TYPE_LONG_ACCUM_ID;
103 case BuiltinType::UShortAccum:
104 ID = PREDEF_TYPE_USHORT_ACCUM_ID;
106 case BuiltinType::UAccum:
107 ID = PREDEF_TYPE_UACCUM_ID;
109 case BuiltinType::ULongAccum:
110 ID = PREDEF_TYPE_ULONG_ACCUM_ID;
112 case BuiltinType::ShortFract:
113 ID = PREDEF_TYPE_SHORT_FRACT_ID;
115 case BuiltinType::Fract:
116 ID = PREDEF_TYPE_FRACT_ID;
118 case BuiltinType::LongFract:
119 ID = PREDEF_TYPE_LONG_FRACT_ID;
121 case BuiltinType::UShortFract:
122 ID = PREDEF_TYPE_USHORT_FRACT_ID;
124 case BuiltinType::UFract:
125 ID = PREDEF_TYPE_UFRACT_ID;
127 case BuiltinType::ULongFract:
128 ID = PREDEF_TYPE_ULONG_FRACT_ID;
130 case BuiltinType::SatShortAccum:
131 ID = PREDEF_TYPE_SAT_SHORT_ACCUM_ID;
133 case BuiltinType::SatAccum:
134 ID = PREDEF_TYPE_SAT_ACCUM_ID;
136 case BuiltinType::SatLongAccum:
137 ID = PREDEF_TYPE_SAT_LONG_ACCUM_ID;
139 case BuiltinType::SatUShortAccum:
140 ID = PREDEF_TYPE_SAT_USHORT_ACCUM_ID;
142 case BuiltinType::SatUAccum:
143 ID = PREDEF_TYPE_SAT_UACCUM_ID;
145 case BuiltinType::SatULongAccum:
146 ID = PREDEF_TYPE_SAT_ULONG_ACCUM_ID;
148 case BuiltinType::SatShortFract:
149 ID = PREDEF_TYPE_SAT_SHORT_FRACT_ID;
151 case BuiltinType::SatFract:
152 ID = PREDEF_TYPE_SAT_FRACT_ID;
154 case BuiltinType::SatLongFract:
155 ID = PREDEF_TYPE_SAT_LONG_FRACT_ID;
157 case BuiltinType::SatUShortFract:
158 ID = PREDEF_TYPE_SAT_USHORT_FRACT_ID;
160 case BuiltinType::SatUFract:
161 ID = PREDEF_TYPE_SAT_UFRACT_ID;
163 case BuiltinType::SatULongFract:
164 ID = PREDEF_TYPE_SAT_ULONG_FRACT_ID;
166 case BuiltinType::Float16:
167 ID = PREDEF_TYPE_FLOAT16_ID;
169 case BuiltinType::Float128:
170 ID = PREDEF_TYPE_FLOAT128_ID;
172 case BuiltinType::NullPtr:
173 ID = PREDEF_TYPE_NULLPTR_ID;
175 case BuiltinType::Char8:
176 ID = PREDEF_TYPE_CHAR8_ID;
178 case BuiltinType::Char16:
179 ID = PREDEF_TYPE_CHAR16_ID;
181 case BuiltinType::Char32:
182 ID = PREDEF_TYPE_CHAR32_ID;
184 case BuiltinType::Overload:
185 ID = PREDEF_TYPE_OVERLOAD_ID;
187 case BuiltinType::BoundMember:
188 ID = PREDEF_TYPE_BOUND_MEMBER;
190 case BuiltinType::PseudoObject:
191 ID = PREDEF_TYPE_PSEUDO_OBJECT;
193 case BuiltinType::Dependent:
194 ID = PREDEF_TYPE_DEPENDENT_ID;
196 case BuiltinType::UnknownAny:
197 ID = PREDEF_TYPE_UNKNOWN_ANY;
199 case BuiltinType::ARCUnbridgedCast:
200 ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST;
202 case BuiltinType::ObjCId:
203 ID = PREDEF_TYPE_OBJC_ID;
205 case BuiltinType::ObjCClass:
206 ID = PREDEF_TYPE_OBJC_CLASS;
208 case BuiltinType::ObjCSel:
209 ID = PREDEF_TYPE_OBJC_SEL;
211 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
212 case BuiltinType::Id: \
213 ID = PREDEF_TYPE_##Id##_ID; \
215 #include "clang/Basic/OpenCLImageTypes.def"
216 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
217 case BuiltinType::Id: \
218 ID = PREDEF_TYPE_##Id##_ID; \
220 #include "clang/Basic/OpenCLExtensionTypes.def"
221 case BuiltinType::OCLSampler:
222 ID = PREDEF_TYPE_SAMPLER_ID;
224 case BuiltinType::OCLEvent:
225 ID = PREDEF_TYPE_EVENT_ID;
227 case BuiltinType::OCLClkEvent:
228 ID = PREDEF_TYPE_CLK_EVENT_ID;
230 case BuiltinType::OCLQueue:
231 ID = PREDEF_TYPE_QUEUE_ID;
233 case BuiltinType::OCLReserveID:
234 ID = PREDEF_TYPE_RESERVE_ID_ID;
236 case BuiltinType::BuiltinFn:
237 ID = PREDEF_TYPE_BUILTIN_FN;
239 case BuiltinType::OMPArraySection:
240 ID = PREDEF_TYPE_OMP_ARRAY_SECTION;
247 unsigned serialization::ComputeHash(Selector Sel) {
248 unsigned N = Sel.getNumArgs();
252 for (unsigned I = 0; I != N; ++I)
253 if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
254 R = llvm::djbHash(II->getName(), R);
259 serialization::getDefinitiveDeclContext(const DeclContext *DC) {
260 switch (DC->getDeclKind()) {
261 // These entities may have multiple definitions.
262 case Decl::TranslationUnit:
263 case Decl::ExternCContext:
264 case Decl::Namespace:
265 case Decl::LinkageSpec:
269 // C/C++ tag types can only be defined in one place.
272 if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition())
276 // FIXME: These can be defined in one place... except special member
277 // functions and out-of-line definitions.
278 case Decl::CXXRecord:
279 case Decl::ClassTemplateSpecialization:
280 case Decl::ClassTemplatePartialSpecialization:
283 // Each function, method, and block declaration is its own DeclContext.
285 case Decl::CXXMethod:
286 case Decl::CXXConstructor:
287 case Decl::CXXDestructor:
288 case Decl::CXXConversion:
289 case Decl::ObjCMethod:
292 // Objective C categories, category implementations, and class
293 // implementations can only be defined in one place.
294 case Decl::ObjCCategory:
295 case Decl::ObjCCategoryImpl:
296 case Decl::ObjCImplementation:
299 case Decl::ObjCProtocol:
300 if (const ObjCProtocolDecl *Def
301 = cast<ObjCProtocolDecl>(DC)->getDefinition())
305 // FIXME: These are defined in one place, but properties in class extensions
306 // end up being back-patched into the main interface. See
307 // Sema::HandlePropertyInClassExtension for the offending code.
308 case Decl::ObjCInterface:
312 llvm_unreachable("Unhandled DeclContext in AST reader");
315 llvm_unreachable("Unhandled decl kind");
318 bool serialization::isRedeclarableDeclKind(unsigned Kind) {
319 switch (static_cast<Decl::Kind>(Kind)) {
320 case Decl::TranslationUnit:
321 case Decl::ExternCContext:
322 // Special case of a "merged" declaration.
325 case Decl::Namespace:
326 case Decl::NamespaceAlias:
328 case Decl::TypeAlias:
331 case Decl::CXXRecord:
332 case Decl::ClassTemplateSpecialization:
333 case Decl::ClassTemplatePartialSpecialization:
334 case Decl::VarTemplateSpecialization:
335 case Decl::VarTemplatePartialSpecialization:
337 case Decl::CXXDeductionGuide:
338 case Decl::CXXMethod:
339 case Decl::CXXConstructor:
340 case Decl::CXXDestructor:
341 case Decl::CXXConversion:
342 case Decl::UsingShadow:
343 case Decl::ConstructorUsingShadow:
345 case Decl::FunctionTemplate:
346 case Decl::ClassTemplate:
347 case Decl::VarTemplate:
348 case Decl::TypeAliasTemplate:
349 case Decl::ObjCProtocol:
350 case Decl::ObjCInterface:
354 // Never redeclarable.
355 case Decl::UsingDirective:
357 case Decl::UnresolvedUsingTypename:
358 case Decl::TemplateTypeParm:
359 case Decl::EnumConstant:
360 case Decl::UnresolvedUsingValue:
361 case Decl::IndirectField:
363 case Decl::MSProperty:
365 case Decl::ObjCAtDefsField:
366 case Decl::NonTypeTemplateParm:
367 case Decl::TemplateTemplateParm:
369 case Decl::UsingPack:
370 case Decl::ObjCMethod:
371 case Decl::ObjCCategory:
372 case Decl::ObjCCategoryImpl:
373 case Decl::ObjCImplementation:
374 case Decl::ObjCProperty:
375 case Decl::ObjCCompatibleAlias:
376 case Decl::LinkageSpec:
378 case Decl::ObjCPropertyImpl:
379 case Decl::PragmaComment:
380 case Decl::PragmaDetectMismatch:
381 case Decl::FileScopeAsm:
382 case Decl::AccessSpec:
384 case Decl::FriendTemplate:
385 case Decl::StaticAssert:
388 case Decl::ClassScopeFunctionSpecialization:
390 case Decl::OMPThreadPrivate:
391 case Decl::OMPRequires:
392 case Decl::OMPCapturedExpr:
393 case Decl::OMPDeclareReduction:
394 case Decl::BuiltinTemplate:
395 case Decl::Decomposition:
399 // These indirectly derive from Redeclarable<T> but are not actually
401 case Decl::ImplicitParam:
403 case Decl::ObjCTypeParam:
407 llvm_unreachable("Unhandled declaration kind");
410 bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) {
411 // Friend declarations in dependent contexts aren't anonymous in the usual
412 // sense, but they cannot be found by name lookup in their semantic context
413 // (or indeed in any context), so we treat them as anonymous.
415 // This doesn't apply to friend tag decls; Sema makes those available to name
416 // lookup in the surrounding context.
417 if (D->getFriendObjectKind() &&
418 D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) {
419 // For function templates and class templates, the template is numbered and
421 if (auto *FD = dyn_cast<FunctionDecl>(D))
422 return !FD->getDescribedFunctionTemplate();
423 if (auto *RD = dyn_cast<CXXRecordDecl>(D))
424 return !RD->getDescribedClassTemplate();
428 // At block scope, we number everything that we need to deduplicate, since we
429 // can't just use name matching to keep things lined up.
430 // FIXME: This is only necessary for an inline function or a template or
432 if (D->getLexicalDeclContext()->isFunctionOrMethod()) {
433 if (auto *VD = dyn_cast<VarDecl>(D))
434 return VD->isStaticLocal();
435 // FIXME: What about CapturedDecls (and declarations nested within them)?
436 return isa<TagDecl>(D) || isa<BlockDecl>(D);
439 // Otherwise, we only care about anonymous class members / block-scope decls.
440 // FIXME: We need to handle lambdas and blocks within inline / templated
442 if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext()))
444 return isa<TagDecl>(D) || isa<FieldDecl>(D);