include/llvm/LTO/LTOBackend.h

   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(Config &C, AddStreamFn AddStream,
  39               unsigned ParallelCodeGenParallelismLevel,
  40               std::unique_ptr<Module> M, ModuleSummaryIndex &CombinedIndex);
  41
  42 /// Runs a ThinLTO backend.
  43 Error thinBackend(Config &C, unsigned Task, AddStreamFn AddStream, Module &M,
  44                   const ModuleSummaryIndex &CombinedIndex,
  45                   const FunctionImporter::ImportMapTy &ImportList,
  46                   const GVSummaryMapTy &DefinedGlobals,
  47                   MapVector<StringRef, BitcodeModule> &ModuleMap);
  48 }
  49 }
  50
  51 #endif