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llvm-project/clang/lib/Serialization/ASTCommon.cpp

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//===--- ASTCommon.cpp - Common stuff for ASTReader/ASTWriter----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines common functions that both ASTReader and ASTWriter use.
//
//===----------------------------------------------------------------------===//
#include "ASTCommon.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Serialization/ASTDeserializationListener.h"
#include "llvm/Support/DJB.h"
using namespace clang;
// Give ASTDeserializationListener's VTable a home.
ASTDeserializationListener::~ASTDeserializationListener() { }
serialization::TypeIdx
serialization::TypeIdxFromBuiltin(const BuiltinType *BT) {
unsigned ID = 0;
switch (BT->getKind()) {
case BuiltinType::Void:
ID = PREDEF_TYPE_VOID_ID;
break;
case BuiltinType::Bool:
ID = PREDEF_TYPE_BOOL_ID;
break;
case BuiltinType::Char_U:
ID = PREDEF_TYPE_CHAR_U_ID;
break;
case BuiltinType::UChar:
ID = PREDEF_TYPE_UCHAR_ID;
break;
case BuiltinType::UShort:
ID = PREDEF_TYPE_USHORT_ID;
break;
case BuiltinType::UInt:
ID = PREDEF_TYPE_UINT_ID;
break;
case BuiltinType::ULong:
ID = PREDEF_TYPE_ULONG_ID;
break;
case BuiltinType::ULongLong:
ID = PREDEF_TYPE_ULONGLONG_ID;
break;
case BuiltinType::UInt128:
ID = PREDEF_TYPE_UINT128_ID;
break;
case BuiltinType::Char_S:
ID = PREDEF_TYPE_CHAR_S_ID;
break;
case BuiltinType::SChar:
ID = PREDEF_TYPE_SCHAR_ID;
break;
case BuiltinType::WChar_S:
case BuiltinType::WChar_U:
ID = PREDEF_TYPE_WCHAR_ID;
break;
case BuiltinType::Short:
ID = PREDEF_TYPE_SHORT_ID;
break;
case BuiltinType::Int:
ID = PREDEF_TYPE_INT_ID;
break;
case BuiltinType::Long:
ID = PREDEF_TYPE_LONG_ID;
break;
case BuiltinType::LongLong:
ID = PREDEF_TYPE_LONGLONG_ID;
break;
case BuiltinType::Int128:
ID = PREDEF_TYPE_INT128_ID;
break;
case BuiltinType::Half:
ID = PREDEF_TYPE_HALF_ID;
break;
case BuiltinType::Float:
ID = PREDEF_TYPE_FLOAT_ID;
break;
case BuiltinType::Double:
ID = PREDEF_TYPE_DOUBLE_ID;
break;
case BuiltinType::LongDouble:
ID = PREDEF_TYPE_LONGDOUBLE_ID;
break;
case BuiltinType::ShortAccum:
ID = PREDEF_TYPE_SHORT_ACCUM_ID;
break;
case BuiltinType::Accum:
ID = PREDEF_TYPE_ACCUM_ID;
break;
case BuiltinType::LongAccum:
ID = PREDEF_TYPE_LONG_ACCUM_ID;
break;
case BuiltinType::UShortAccum:
ID = PREDEF_TYPE_USHORT_ACCUM_ID;
break;
case BuiltinType::UAccum:
ID = PREDEF_TYPE_UACCUM_ID;
break;
case BuiltinType::ULongAccum:
ID = PREDEF_TYPE_ULONG_ACCUM_ID;
break;
case BuiltinType::ShortFract:
ID = PREDEF_TYPE_SHORT_FRACT_ID;
break;
case BuiltinType::Fract:
ID = PREDEF_TYPE_FRACT_ID;
break;
case BuiltinType::LongFract:
ID = PREDEF_TYPE_LONG_FRACT_ID;
break;
case BuiltinType::UShortFract:
ID = PREDEF_TYPE_USHORT_FRACT_ID;
break;
case BuiltinType::UFract:
ID = PREDEF_TYPE_UFRACT_ID;
break;
case BuiltinType::ULongFract:
ID = PREDEF_TYPE_ULONG_FRACT_ID;
break;
case BuiltinType::SatShortAccum:
ID = PREDEF_TYPE_SAT_SHORT_ACCUM_ID;
break;
case BuiltinType::SatAccum:
ID = PREDEF_TYPE_SAT_ACCUM_ID;
break;
case BuiltinType::SatLongAccum:
ID = PREDEF_TYPE_SAT_LONG_ACCUM_ID;
break;
case BuiltinType::SatUShortAccum:
ID = PREDEF_TYPE_SAT_USHORT_ACCUM_ID;
break;
case BuiltinType::SatUAccum:
ID = PREDEF_TYPE_SAT_UACCUM_ID;
break;
case BuiltinType::SatULongAccum:
ID = PREDEF_TYPE_SAT_ULONG_ACCUM_ID;
break;
case BuiltinType::SatShortFract:
ID = PREDEF_TYPE_SAT_SHORT_FRACT_ID;
break;
case BuiltinType::SatFract:
ID = PREDEF_TYPE_SAT_FRACT_ID;
break;
case BuiltinType::SatLongFract:
ID = PREDEF_TYPE_SAT_LONG_FRACT_ID;
break;
case BuiltinType::SatUShortFract:
ID = PREDEF_TYPE_SAT_USHORT_FRACT_ID;
break;
case BuiltinType::SatUFract:
ID = PREDEF_TYPE_SAT_UFRACT_ID;
break;
case BuiltinType::SatULongFract:
ID = PREDEF_TYPE_SAT_ULONG_FRACT_ID;
break;
case BuiltinType::Float16:
ID = PREDEF_TYPE_FLOAT16_ID;
break;
case BuiltinType::Float128:
ID = PREDEF_TYPE_FLOAT128_ID;
break;
case BuiltinType::NullPtr:
ID = PREDEF_TYPE_NULLPTR_ID;
break;
case BuiltinType::Char8:
ID = PREDEF_TYPE_CHAR8_ID;
break;
case BuiltinType::Char16:
ID = PREDEF_TYPE_CHAR16_ID;
break;
case BuiltinType::Char32:
ID = PREDEF_TYPE_CHAR32_ID;
break;
case BuiltinType::Overload:
ID = PREDEF_TYPE_OVERLOAD_ID;
break;
case BuiltinType::BoundMember:
ID = PREDEF_TYPE_BOUND_MEMBER;
break;
case BuiltinType::PseudoObject:
ID = PREDEF_TYPE_PSEUDO_OBJECT;
break;
case BuiltinType::Dependent:
ID = PREDEF_TYPE_DEPENDENT_ID;
break;
case BuiltinType::UnknownAny:
ID = PREDEF_TYPE_UNKNOWN_ANY;
break;
case BuiltinType::ARCUnbridgedCast:
ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST;
break;
case BuiltinType::ObjCId:
ID = PREDEF_TYPE_OBJC_ID;
break;
case BuiltinType::ObjCClass:
ID = PREDEF_TYPE_OBJC_CLASS;
break;
case BuiltinType::ObjCSel:
ID = PREDEF_TYPE_OBJC_SEL;
break;
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
case BuiltinType::Id: \
ID = PREDEF_TYPE_##Id##_ID; \
break;
#include "clang/Basic/OpenCLImageTypes.def"
#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
case BuiltinType::Id: \
ID = PREDEF_TYPE_##Id##_ID; \
break;
#include "clang/Basic/OpenCLExtensionTypes.def"
case BuiltinType::OCLSampler:
ID = PREDEF_TYPE_SAMPLER_ID;
break;
case BuiltinType::OCLEvent:
ID = PREDEF_TYPE_EVENT_ID;
break;
case BuiltinType::OCLClkEvent:
ID = PREDEF_TYPE_CLK_EVENT_ID;
break;
case BuiltinType::OCLQueue:
ID = PREDEF_TYPE_QUEUE_ID;
break;
case BuiltinType::OCLReserveID:
ID = PREDEF_TYPE_RESERVE_ID_ID;
break;
#define SVE_TYPE(Name, Id, SingletonId) \
case BuiltinType::Id: \
ID = PREDEF_TYPE_##Id##_ID; \
break;
#include "clang/Basic/AArch64SVEACLETypes.def"
case BuiltinType::BuiltinFn:
ID = PREDEF_TYPE_BUILTIN_FN;
break;
case BuiltinType::OMPArraySection:
ID = PREDEF_TYPE_OMP_ARRAY_SECTION;
break;
}
return TypeIdx(ID);
}
unsigned serialization::ComputeHash(Selector Sel) {
unsigned N = Sel.getNumArgs();
if (N == 0)
++N;
unsigned R = 5381;
for (unsigned I = 0; I != N; ++I)
if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
R = llvm::djbHash(II->getName(), R);
return R;
}
const DeclContext *
serialization::getDefinitiveDeclContext(const DeclContext *DC) {
switch (DC->getDeclKind()) {
// These entities may have multiple definitions.
case Decl::TranslationUnit:
case Decl::ExternCContext:
case Decl::Namespace:
case Decl::LinkageSpec:
case Decl::Export:
return nullptr;
// C/C++ tag types can only be defined in one place.
case Decl::Enum:
case Decl::Record:
if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition())
return Def;
return nullptr;
// FIXME: These can be defined in one place... except special member
// functions and out-of-line definitions.
case Decl::CXXRecord:
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
return nullptr;
// Each function, method, and block declaration is its own DeclContext.
case Decl::Function:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
case Decl::ObjCMethod:
case Decl::Block:
case Decl::Captured:
// Objective C categories, category implementations, and class
// implementations can only be defined in one place.
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl:
case Decl::ObjCImplementation:
return DC;
case Decl::ObjCProtocol:
if (const ObjCProtocolDecl *Def
= cast<ObjCProtocolDecl>(DC)->getDefinition())
return Def;
return nullptr;
// FIXME: These are defined in one place, but properties in class extensions
// end up being back-patched into the main interface. See
// Sema::HandlePropertyInClassExtension for the offending code.
case Decl::ObjCInterface:
return nullptr;
default:
llvm_unreachable("Unhandled DeclContext in AST reader");
}
llvm_unreachable("Unhandled decl kind");
}
bool serialization::isRedeclarableDeclKind(unsigned Kind) {
switch (static_cast<Decl::Kind>(Kind)) {
case Decl::TranslationUnit:
case Decl::ExternCContext:
// Special case of a "merged" declaration.
return true;
case Decl::Namespace:
case Decl::NamespaceAlias:
case Decl::Typedef:
case Decl::TypeAlias:
case Decl::Enum:
case Decl::Record:
case Decl::CXXRecord:
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
case Decl::VarTemplateSpecialization:
case Decl::VarTemplatePartialSpecialization:
case Decl::Function:
case Decl::CXXDeductionGuide:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
case Decl::UsingShadow:
case Decl::ConstructorUsingShadow:
case Decl::Var:
case Decl::FunctionTemplate:
case Decl::ClassTemplate:
case Decl::VarTemplate:
case Decl::TypeAliasTemplate:
case Decl::ObjCProtocol:
case Decl::ObjCInterface:
case Decl::Empty:
return true;
// Never redeclarable.
case Decl::UsingDirective:
case Decl::Label:
case Decl::UnresolvedUsingTypename:
case Decl::TemplateTypeParm:
case Decl::EnumConstant:
case Decl::UnresolvedUsingValue:
case Decl::IndirectField:
case Decl::Field:
case Decl::MSProperty:
case Decl::ObjCIvar:
case Decl::ObjCAtDefsField:
case Decl::NonTypeTemplateParm:
case Decl::TemplateTemplateParm:
case Decl::Using:
case Decl::UsingPack:
case Decl::ObjCMethod:
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl:
case Decl::ObjCImplementation:
case Decl::ObjCProperty:
case Decl::ObjCCompatibleAlias:
case Decl::LinkageSpec:
case Decl::Export:
case Decl::ObjCPropertyImpl:
case Decl::PragmaComment:
case Decl::PragmaDetectMismatch:
case Decl::FileScopeAsm:
case Decl::AccessSpec:
case Decl::Friend:
case Decl::FriendTemplate:
case Decl::StaticAssert:
case Decl::Block:
case Decl::Captured:
case Decl::ClassScopeFunctionSpecialization:
case Decl::Import:
case Decl::OMPThreadPrivate:
case Decl::OMPAllocate:
case Decl::OMPRequires:
case Decl::OMPCapturedExpr:
case Decl::OMPDeclareReduction:
case Decl::OMPDeclareMapper:
case Decl::BuiltinTemplate:
case Decl::Decomposition:
case Decl::Binding:
case Decl::Concept:
return false;
// These indirectly derive from Redeclarable<T> but are not actually
// redeclarable.
case Decl::ImplicitParam:
case Decl::ParmVar:
case Decl::ObjCTypeParam:
return false;
}
llvm_unreachable("Unhandled declaration kind");
}
bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) {
// Friend declarations in dependent contexts aren't anonymous in the usual
// sense, but they cannot be found by name lookup in their semantic context
// (or indeed in any context), so we treat them as anonymous.
//
// This doesn't apply to friend tag decls; Sema makes those available to name
// lookup in the surrounding context.
if (D->getFriendObjectKind() &&
D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) {
// For function templates and class templates, the template is numbered and
// not its pattern.
if (auto *FD = dyn_cast<FunctionDecl>(D))
return !FD->getDescribedFunctionTemplate();
if (auto *RD = dyn_cast<CXXRecordDecl>(D))
return !RD->getDescribedClassTemplate();
return true;
}
// At block scope, we number everything that we need to deduplicate, since we
// can't just use name matching to keep things lined up.
// FIXME: This is only necessary for an inline function or a template or
// similar.
if (D->getLexicalDeclContext()->isFunctionOrMethod()) {
if (auto *VD = dyn_cast<VarDecl>(D))
return VD->isStaticLocal();
// FIXME: What about CapturedDecls (and declarations nested within them)?
return isa<TagDecl>(D) || isa<BlockDecl>(D);
}
// Otherwise, we only care about anonymous class members / block-scope decls.
// FIXME: We need to handle lambdas and blocks within inline / templated
// variables too.
if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext()))
return false;
return isa<TagDecl>(D) || isa<FieldDecl>(D);
}
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