forked from OSchip/llvm-project
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
//===- TypeMerger.h ---------------------------------------------*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLD_COFF_TYPEMERGER_H
|
|
#define LLD_COFF_TYPEMERGER_H
|
|
|
|
#include "Config.h"
|
|
#include "DebugTypes.h"
|
|
#include "lld/Common/Timer.h"
|
|
#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
|
|
#include "llvm/DebugInfo/CodeView/TypeHashing.h"
|
|
#include "llvm/Support/Allocator.h"
|
|
#include <atomic>
|
|
|
|
namespace lld {
|
|
namespace coff {
|
|
|
|
using llvm::codeview::GloballyHashedType;
|
|
using llvm::codeview::TypeIndex;
|
|
|
|
struct GHashState;
|
|
|
|
class TypeMerger {
|
|
public:
|
|
TypeMerger(COFFLinkerContext &ctx, llvm::BumpPtrAllocator &alloc);
|
|
|
|
~TypeMerger();
|
|
|
|
/// Get the type table or the global type table if /DEBUG:GHASH is enabled.
|
|
inline llvm::codeview::TypeCollection &getTypeTable() {
|
|
assert(!config->debugGHashes);
|
|
return typeTable;
|
|
}
|
|
|
|
/// Get the ID table or the global ID table if /DEBUG:GHASH is enabled.
|
|
inline llvm::codeview::TypeCollection &getIDTable() {
|
|
assert(!config->debugGHashes);
|
|
return idTable;
|
|
}
|
|
|
|
/// Use global hashes to eliminate duplicate types and identify unique type
|
|
/// indices in each TpiSource.
|
|
void mergeTypesWithGHash();
|
|
|
|
/// Map from PDB function id type indexes to PDB function type indexes.
|
|
/// Populated after mergeTypesWithGHash.
|
|
llvm::DenseMap<TypeIndex, TypeIndex> funcIdToType;
|
|
|
|
/// Type records that will go into the PDB TPI stream.
|
|
llvm::codeview::MergingTypeTableBuilder typeTable;
|
|
|
|
/// Item records that will go into the PDB IPI stream.
|
|
llvm::codeview::MergingTypeTableBuilder idTable;
|
|
|
|
// When showSummary is enabled, these are histograms of TPI and IPI records
|
|
// keyed by type index.
|
|
SmallVector<uint32_t, 0> tpiCounts;
|
|
SmallVector<uint32_t, 0> ipiCounts;
|
|
|
|
/// Dependency type sources, such as type servers or PCH object files. These
|
|
/// must be processed before objects that rely on them. Set by
|
|
/// sortDependencies.
|
|
ArrayRef<TpiSource *> dependencySources;
|
|
|
|
/// Object file sources. These must be processed after dependencySources.
|
|
ArrayRef<TpiSource *> objectSources;
|
|
|
|
/// Sorts the dependencies and reassigns TpiSource indices.
|
|
void sortDependencies();
|
|
|
|
private:
|
|
void clearGHashes();
|
|
|
|
COFFLinkerContext &ctx;
|
|
};
|
|
|
|
} // namespace coff
|
|
} // namespace lld
|
|
|
|
#endif
|