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