forked from OSchip/llvm-project
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
//===- TypeMerger.h ---------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_COFF_TYPEMERGER_H
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#define LLD_COFF_TYPEMERGER_H
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#include "Config.h"
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#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
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#include "llvm/DebugInfo/CodeView/TypeHashing.h"
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#include "llvm/Support/Allocator.h"
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#include <atomic>
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namespace lld {
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namespace coff {
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using llvm::codeview::GloballyHashedType;
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using llvm::codeview::TypeIndex;
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struct GHashState;
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class TypeMerger {
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public:
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TypeMerger(llvm::BumpPtrAllocator &alloc);
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~TypeMerger();
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/// Get the type table or the global type table if /DEBUG:GHASH is enabled.
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inline llvm::codeview::TypeCollection &getTypeTable() {
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assert(!config->debugGHashes);
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return typeTable;
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}
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/// Get the ID table or the global ID table if /DEBUG:GHASH is enabled.
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inline llvm::codeview::TypeCollection &getIDTable() {
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assert(!config->debugGHashes);
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return idTable;
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}
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/// Use global hashes to eliminate duplicate types and identify unique type
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/// indices in each TpiSource.
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void mergeTypesWithGHash();
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/// Map from PDB function id type indexes to PDB function type indexes.
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/// Populated after mergeTypesWithGHash.
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llvm::DenseMap<TypeIndex, TypeIndex> funcIdToType;
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/// Type records that will go into the PDB TPI stream.
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llvm::codeview::MergingTypeTableBuilder typeTable;
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/// Item records that will go into the PDB IPI stream.
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llvm::codeview::MergingTypeTableBuilder idTable;
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// When showSummary is enabled, these are histograms of TPI and IPI records
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// keyed by type index.
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SmallVector<uint32_t, 0> tpiCounts;
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SmallVector<uint32_t, 0> ipiCounts;
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};
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} // namespace coff
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} // namespace lld
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#endif
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