1 //===- ThinLTOBitcodeWriter.h - Bitcode writing pass for ThinLTO ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This pass prepares a module containing type metadata for ThinLTO by splitting
11 // it into regular and thin LTO parts if possible, and writing both parts to
12 // a multi-module bitcode file. Modules that do not contain type metadata are
13 // written unmodified as a single module.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
18 #define LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
19 
20 #include <llvm/IR/PassManager.h>
21 #include <llvm/Support/raw_ostream.h>
22 
23 namespace llvm {
24 
25 class ThinLTOBitcodeWriterPass
26     : public PassInfoMixin<ThinLTOBitcodeWriterPass> {
27   raw_ostream &OS;
28   raw_ostream *ThinLinkOS;
29 
30 public:
31   // Writes bitcode to OS. Also write thin link file to ThinLinkOS, if
32   // it's not nullptr.
ThinLTOBitcodeWriterPass(raw_ostream & OS,raw_ostream * ThinLinkOS)33   ThinLTOBitcodeWriterPass(raw_ostream &OS, raw_ostream *ThinLinkOS)
34       : OS(OS), ThinLinkOS(ThinLinkOS) {}
35 
36   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
37 };
38 
39 } // namespace llvm
40 
41 #endif
42