1 //===-- BitcodeWriterPass.h - Bitcode writing pass --------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// This file provides a bitcode writing pass.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_BITCODE_BITCODEWRITERPASS_H
16 #define LLVM_BITCODE_BITCODEWRITERPASS_H
18 #include "llvm/ADT/StringRef.h"
19 #include "llvm/IR/PassManager.h"
26 /// \brief Create and return a pass that writes the module to the specified
27 /// ostream. Note that this pass is designed for use with the legacy pass
30 /// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
31 /// reproduced when deserialized.
33 /// If \c EmitSummaryIndex, emit the summary index (currently for use in ThinLTO
36 /// If \c EmitModuleHash, compute and emit the module hash in the bitcode
37 /// (currently for use in ThinLTO incremental build).
38 ModulePass *createBitcodeWriterPass(raw_ostream &Str,
39 bool ShouldPreserveUseListOrder = false,
40 bool EmitSummaryIndex = false,
41 bool EmitModuleHash = false);
43 /// \brief Pass for writing a module of IR out to a bitcode file.
45 /// Note that this is intended for use with the new pass manager. To construct
46 /// a pass for the legacy pass manager, use the function above.
47 class BitcodeWriterPass : public PassInfoMixin<BitcodeWriterPass> {
49 bool ShouldPreserveUseListOrder;
50 bool EmitSummaryIndex;
54 /// \brief Construct a bitcode writer pass around a particular output stream.
56 /// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
57 /// reproduced when deserialized.
59 /// If \c EmitSummaryIndex, emit the summary index (currently
60 /// for use in ThinLTO optimization).
61 explicit BitcodeWriterPass(raw_ostream &OS,
62 bool ShouldPreserveUseListOrder = false,
63 bool EmitSummaryIndex = false,
64 bool EmitModuleHash = false)
65 : OS(OS), ShouldPreserveUseListOrder(ShouldPreserveUseListOrder),
66 EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) {}
68 /// \brief Run the bitcode writer pass, and output the module to the selected
70 PreservedAnalyses run(Module &M, ModuleAnalysisManager &);