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d88a7f1a92
r246546, with a workaround for an MSVC 2013 miscompile and an MSVC 2015 rejects-valid. Original commit message: [modules] Rework serialized DeclContext lookup table management. Instead of walking the loaded ModuleFiles looking for lookup tables for the context, store them all in one place, and merge them together if we find we have too many (currently, more than 4). If we do merge, include the merged form in our serialized lookup table, so that downstream readers never need to look at our imports' tables. This gives a huge performance improvement to builds with very large numbers of modules (in some cases, more than a 2x speedup was observed). llvm-svn: 246582
116 lines
4.7 KiB
C++
116 lines
4.7 KiB
C++
//===--- Module.cpp - Module description ------------------------*- 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 implements the Module class, which describes a module that has
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// been loaded from an AST file.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Serialization/Module.h"
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#include "ASTReaderInternals.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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using namespace serialization;
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using namespace reader;
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ModuleFile::ModuleFile(ModuleKind Kind, unsigned Generation)
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: Kind(Kind), File(nullptr), Signature(0), DirectlyImported(false),
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Generation(Generation), SizeInBits(0),
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LocalNumSLocEntries(0), SLocEntryBaseID(0),
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SLocEntryBaseOffset(0), SLocEntryOffsets(nullptr),
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LocalNumIdentifiers(0),
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IdentifierOffsets(nullptr), BaseIdentifierID(0),
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IdentifierTableData(nullptr), IdentifierLookupTable(nullptr),
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LocalNumMacros(0), MacroOffsets(nullptr),
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BasePreprocessedEntityID(0),
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PreprocessedEntityOffsets(nullptr), NumPreprocessedEntities(0),
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LocalNumHeaderFileInfos(0),
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HeaderFileInfoTableData(nullptr), HeaderFileInfoTable(nullptr),
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LocalNumSubmodules(0), BaseSubmoduleID(0),
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LocalNumSelectors(0), SelectorOffsets(nullptr), BaseSelectorID(0),
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SelectorLookupTableData(nullptr), SelectorLookupTable(nullptr),
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LocalNumDecls(0), DeclOffsets(nullptr), BaseDeclID(0),
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LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(nullptr),
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LocalNumCXXCtorInitializers(0), CXXCtorInitializersOffsets(nullptr),
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FileSortedDecls(nullptr), NumFileSortedDecls(0),
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ObjCCategoriesMap(nullptr), LocalNumObjCCategoriesInMap(0),
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LocalNumTypes(0), TypeOffsets(nullptr), BaseTypeIndex(0)
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{}
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ModuleFile::~ModuleFile() {
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delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable);
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delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable);
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delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable);
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}
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template<typename Key, typename Offset, unsigned InitialCapacity>
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static void
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dumpLocalRemap(StringRef Name,
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const ContinuousRangeMap<Key, Offset, InitialCapacity> &Map) {
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if (Map.begin() == Map.end())
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return;
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typedef ContinuousRangeMap<Key, Offset, InitialCapacity> MapType;
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llvm::errs() << " " << Name << ":\n";
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for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
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I != IEnd; ++I) {
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llvm::errs() << " " << I->first << " -> " << I->second << "\n";
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}
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}
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void ModuleFile::dump() {
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llvm::errs() << "\nModule: " << FileName << "\n";
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if (!Imports.empty()) {
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llvm::errs() << " Imports: ";
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for (unsigned I = 0, N = Imports.size(); I != N; ++I) {
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if (I)
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llvm::errs() << ", ";
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llvm::errs() << Imports[I]->FileName;
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}
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llvm::errs() << "\n";
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}
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// Remapping tables.
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llvm::errs() << " Base source location offset: " << SLocEntryBaseOffset
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<< '\n';
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dumpLocalRemap("Source location offset local -> global map", SLocRemap);
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llvm::errs() << " Base identifier ID: " << BaseIdentifierID << '\n'
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<< " Number of identifiers: " << LocalNumIdentifiers << '\n';
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dumpLocalRemap("Identifier ID local -> global map", IdentifierRemap);
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llvm::errs() << " Base macro ID: " << BaseMacroID << '\n'
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<< " Number of macros: " << LocalNumMacros << '\n';
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dumpLocalRemap("Macro ID local -> global map", MacroRemap);
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llvm::errs() << " Base submodule ID: " << BaseSubmoduleID << '\n'
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<< " Number of submodules: " << LocalNumSubmodules << '\n';
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dumpLocalRemap("Submodule ID local -> global map", SubmoduleRemap);
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llvm::errs() << " Base selector ID: " << BaseSelectorID << '\n'
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<< " Number of selectors: " << LocalNumSelectors << '\n';
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dumpLocalRemap("Selector ID local -> global map", SelectorRemap);
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llvm::errs() << " Base preprocessed entity ID: " << BasePreprocessedEntityID
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<< '\n'
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<< " Number of preprocessed entities: "
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<< NumPreprocessedEntities << '\n';
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dumpLocalRemap("Preprocessed entity ID local -> global map",
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PreprocessedEntityRemap);
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llvm::errs() << " Base type index: " << BaseTypeIndex << '\n'
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<< " Number of types: " << LocalNumTypes << '\n';
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dumpLocalRemap("Type index local -> global map", TypeRemap);
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llvm::errs() << " Base decl ID: " << BaseDeclID << '\n'
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<< " Number of decls: " << LocalNumDecls << '\n';
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dumpLocalRemap("Decl ID local -> global map", DeclRemap);
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}
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