78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
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//===-LTOBackend.h - LLVM Link Time Optimizer Backend ---------------------===//
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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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//
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// This file implements the "backend" phase of LTO, i.e. it performs
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// optimization and code generation on a loaded module. It is generally used
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// internally by the LTO class but can also be used independently, for example
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// to implement a standalone ThinLTO backend.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LTO_LTOBACKEND_H
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#define LLVM_LTO_LTOBACKEND_H
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#include "llvm/ADT/MapVector.h"
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#include "llvm/IR/DiagnosticInfo.h"
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#include "llvm/IR/ModuleSummaryIndex.h"
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#include "llvm/LTO/LTO.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Transforms/IPO/FunctionImport.h"
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namespace llvm {
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class BitcodeModule;
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class Error;
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class Module;
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class Target;
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namespace lto {
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/// Runs middle-end LTO optimizations on \p Mod.
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bool opt(const Config &Conf, TargetMachine *TM, unsigned Task, Module &Mod,
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bool IsThinLTO, ModuleSummaryIndex *ExportSummary,
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const ModuleSummaryIndex *ImportSummary,
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const std::vector<uint8_t> &CmdArgs);
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/// Runs a regular LTO backend. The regular LTO backend can also act as the
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/// regular LTO phase of ThinLTO, which may need to access the combined index.
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Error backend(const Config &C, AddStreamFn AddStream,
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unsigned ParallelCodeGenParallelismLevel,
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std::unique_ptr<Module> M, ModuleSummaryIndex &CombinedIndex);
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/// Runs a ThinLTO backend.
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Error thinBackend(const Config &C, unsigned Task, AddStreamFn AddStream,
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Module &M, const ModuleSummaryIndex &CombinedIndex,
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const FunctionImporter::ImportMapTy &ImportList,
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const GVSummaryMapTy &DefinedGlobals,
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MapVector<StringRef, BitcodeModule> &ModuleMap,
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const std::vector<uint8_t> &CmdArgs = std::vector<uint8_t>());
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Error finalizeOptimizationRemarks(
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std::unique_ptr<ToolOutputFile> DiagOutputFile);
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/// Returns the BitcodeModule that is ThinLTO.
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BitcodeModule *findThinLTOModule(MutableArrayRef<BitcodeModule> BMs);
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/// Variant of the above.
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Expected<BitcodeModule> findThinLTOModule(MemoryBufferRef MBRef);
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/// Distributed ThinLTO: load the referenced modules, keeping their buffers
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/// alive in the provided OwnedImportLifetimeManager. Returns false if the
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/// operation failed.
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bool loadReferencedModules(
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const Module &M, const ModuleSummaryIndex &CombinedIndex,
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FunctionImporter::ImportMapTy &ImportList,
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MapVector<llvm::StringRef, llvm::BitcodeModule> &ModuleMap,
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std::vector<std::unique_ptr<llvm::MemoryBuffer>>
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&OwnedImportsLifetimeManager);
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}
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}
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#endif
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