1 //===-LTOBackend.h - LLVM Link Time Optimizer Backend ---------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the "backend" phase of LTO, i.e. it performs 10 // optimization and code generation on a loaded module. It is generally used 11 // internally by the LTO class but can also be used independently, for example 12 // to implement a standalone ThinLTO backend. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_LTO_LTOBACKEND_H 17 #define LLVM_LTO_LTOBACKEND_H 18 19 #include "llvm/ADT/MapVector.h" 20 #include "llvm/IR/DiagnosticInfo.h" 21 #include "llvm/IR/ModuleSummaryIndex.h" 22 #include "llvm/LTO/LTO.h" 23 #include "llvm/Support/MemoryBuffer.h" 24 #include "llvm/Target/TargetOptions.h" 25 #include "llvm/Transforms/IPO/FunctionImport.h" 26 27 namespace llvm { 28 29 class BitcodeModule; 30 class Error; 31 class Module; 32 class Target; 33 34 namespace lto { 35 36 /// Runs a regular LTO backend. The regular LTO backend can also act as the 37 /// regular LTO phase of ThinLTO, which may need to access the combined index. 38 Error backend(const Config &C, AddStreamFn AddStream, 39 unsigned ParallelCodeGenParallelismLevel, 40 std::unique_ptr<Module> M, ModuleSummaryIndex &CombinedIndex); 41 42 /// Runs a ThinLTO backend. 43 Error thinBackend(const Config &C, unsigned Task, AddStreamFn AddStream, 44 Module &M, const ModuleSummaryIndex &CombinedIndex, 45 const FunctionImporter::ImportMapTy &ImportList, 46 const GVSummaryMapTy &DefinedGlobals, 47 MapVector<StringRef, BitcodeModule> &ModuleMap); 48 } 49 } 50 51 #endif 52