Author: pcc Date: Tue Sep 8 18:01:30 2015 New Revision: 247098 URL: http://llvm.org/viewvc/llvm-project?rev=247098&view=rev Log: CodeGen: Introduce CodeGenModule::CreateMetadataIdentifierForType.
This function can be used to create a metadata identifier for a specific type. No functionality change, but this will be used by D11857 and D12026. Differential Revision: http://reviews.llvm.org/D12038 Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp cfe/trunk/lib/CodeGen/CodeGenModule.h Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=247098&r1=247097&r2=247098&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original) +++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Tue Sep 8 18:01:30 2015 @@ -3803,6 +3803,25 @@ void CodeGenModule::EmitOMPThreadPrivate } } +llvm::Metadata *CodeGenModule::CreateMetadataIdentifierForType(QualType T) { + llvm::Metadata *&InternalId = MetadataIdMap[T.getCanonicalType()]; + if (InternalId) + return InternalId; + + if (isExternallyVisible(T->getLinkage())) { + std::string OutName; + llvm::raw_string_ostream Out(OutName); + getCXXABI().getMangleContext().mangleTypeName(T, Out); + + InternalId = llvm::MDString::get(getLLVMContext(), Out.str()); + } else { + InternalId = llvm::MDNode::getDistinct(getLLVMContext(), + llvm::ArrayRef<llvm::Metadata *>()); + } + + return InternalId; +} + llvm::MDTuple *CodeGenModule::CreateVTableBitSetEntry( llvm::GlobalVariable *VTable, CharUnits Offset, const CXXRecordDecl *RD) { std::string OutName; Modified: cfe/trunk/lib/CodeGen/CodeGenModule.h URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.h?rev=247098&r1=247097&r2=247098&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CodeGenModule.h (original) +++ cfe/trunk/lib/CodeGen/CodeGenModule.h Tue Sep 8 18:01:30 2015 @@ -483,6 +483,12 @@ private: llvm::DenseMap<const Decl *, bool> DeferredEmptyCoverageMappingDecls; std::unique_ptr<CoverageMappingModuleGen> CoverageMapping; + + /// Mapping from canonical types to their metadata identifiers. We need to + /// maintain this mapping because identifiers may be formed from distinct + /// MDNodes. + llvm::DenseMap<QualType, llvm::Metadata *> MetadataIdMap; + public: CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts, const PreprocessorOptions &ppopts, @@ -1112,6 +1118,11 @@ public: void EmitVTableBitSetEntries(llvm::GlobalVariable *VTable, const VTableLayout &VTLayout); + /// Create a metadata identifier for the given type. This may either be an + /// MDString (for external identifiers) or a distinct unnamed MDNode (for + /// internal identifiers). + llvm::Metadata *CreateMetadataIdentifierForType(QualType T); + /// Create a bitset entry for the given vtable. llvm::MDTuple *CreateVTableBitSetEntry(llvm::GlobalVariable *VTable, CharUnits Offset, _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
