32791cc3e1
By storing the instantiated expression back in the ParmVarDecl, we remove the last need for separately storing the sub-expression of a CXXDefaultArgExpr. This makes PCH/Modules merging quite simple: CXXDefaultArgExpr records are serialized as references to the ParmVarDecl, and we ignore redundant attempts to overwrite the instantiated expression. This has some extremely marginal impact on user-facing semantics. However, the major effect is that it avoids IRGen errors about conflicting definitions due to lambdas in the argument being instantiated multiple times while sharing the same mangling. It should also slightly improve memory usage and module file size. rdar://23810407 llvm-svn: 256983
114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
//===- ASTCommon.h - Common stuff for ASTReader/ASTWriter -*- C++ -*-=========//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines common functions that both ASTReader and ASTWriter use.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
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#define LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclFriend.h"
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#include "clang/Serialization/ASTBitCodes.h"
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namespace clang {
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namespace serialization {
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enum DeclUpdateKind {
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UPD_CXX_ADDED_IMPLICIT_MEMBER,
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UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION,
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UPD_CXX_ADDED_ANONYMOUS_NAMESPACE,
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UPD_CXX_ADDED_FUNCTION_DEFINITION,
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UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER,
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UPD_CXX_INSTANTIATED_CLASS_DEFINITION,
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UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT,
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UPD_CXX_RESOLVED_DTOR_DELETE,
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UPD_CXX_RESOLVED_EXCEPTION_SPEC,
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UPD_CXX_DEDUCED_RETURN_TYPE,
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UPD_DECL_MARKED_USED,
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UPD_MANGLING_NUMBER,
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UPD_STATIC_LOCAL_NUMBER,
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UPD_DECL_MARKED_OPENMP_THREADPRIVATE,
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UPD_DECL_EXPORTED,
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UPD_ADDED_ATTR_TO_RECORD
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};
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TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT);
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template <typename IdxForTypeTy>
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TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) {
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if (T.isNull())
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return PREDEF_TYPE_NULL_ID;
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unsigned FastQuals = T.getLocalFastQualifiers();
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T.removeLocalFastQualifiers();
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if (T.hasLocalNonFastQualifiers())
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return IdxForType(T).asTypeID(FastQuals);
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assert(!T.hasLocalQualifiers());
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if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr()))
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return TypeIdxFromBuiltin(BT).asTypeID(FastQuals);
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if (T == Context.AutoDeductTy)
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return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals);
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if (T == Context.AutoRRefDeductTy)
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return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals);
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return IdxForType(T).asTypeID(FastQuals);
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}
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unsigned ComputeHash(Selector Sel);
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/// \brief Retrieve the "definitive" declaration that provides all of the
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/// visible entries for the given declaration context, if there is one.
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///
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/// The "definitive" declaration is the only place where we need to look to
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/// find information about the declarations within the given declaration
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/// context. For example, C++ and Objective-C classes, C structs/unions, and
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/// Objective-C protocols, categories, and extensions are all defined in a
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/// single place in the source code, so they have definitive declarations
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/// associated with them. C++ namespaces, on the other hand, can have
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/// multiple definitions.
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const DeclContext *getDefinitiveDeclContext(const DeclContext *DC);
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/// \brief Determine whether the given declaration kind is redeclarable.
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bool isRedeclarableDeclKind(unsigned Kind);
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/// \brief Determine whether the given declaration needs an anonymous
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/// declaration number.
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bool needsAnonymousDeclarationNumber(const NamedDecl *D);
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/// \brief Visit each declaration within \c DC that needs an anonymous
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/// declaration number and call \p Visit with the declaration and its number.
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template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC,
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Fn Visit) {
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unsigned Index = 0;
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for (Decl *LexicalD : DC->decls()) {
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// For a friend decl, we care about the declaration within it, if any.
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if (auto *FD = dyn_cast<FriendDecl>(LexicalD))
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LexicalD = FD->getFriendDecl();
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auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD);
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if (!ND || !needsAnonymousDeclarationNumber(ND))
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continue;
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Visit(ND, Index++);
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}
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}
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} // namespace serialization
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} // namespace clang
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#endif
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