include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h

   1 //===- ThinLTOBitcodeWriter.h - Bitcode writing pass for ThinLTO ----------===//
   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 pass prepares a module containing type metadata for ThinLTO by splitting
  10 // it into regular and thin LTO parts if possible, and writing both parts to
  11 // a multi-module bitcode file. Modules that do not contain type metadata are
  12 // written unmodified as a single module.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #ifndef LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
  17 #define LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
  18
  19 #include <llvm/IR/PassManager.h>
  20 #include <llvm/Support/raw_ostream.h>
  21
  22 namespace llvm {
  23
  24 class ThinLTOBitcodeWriterPass
  25     : public PassInfoMixin<ThinLTOBitcodeWriterPass> {
  26   raw_ostream &OS;
  27   raw_ostream *ThinLinkOS;
  28
  29 public:
  30   // Writes bitcode to OS. Also write thin link file to ThinLinkOS, if
  31   // it's not nullptr.
  32   ThinLTOBitcodeWriterPass(raw_ostream &OS, raw_ostream *ThinLinkOS)
  33       : OS(OS), ThinLinkOS(ThinLinkOS) {}
  34
  35   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
  36 };
  37
  38 } // namespace llvm
  39
  40 #endif