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//===-- BitcodeWriterPass.h - Bitcode writing pass --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file provides a bitcode writing pass.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_BITCODE_BITCODEWRITERPASS_H
#define LLVM_BITCODE_BITCODEWRITERPASS_H
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/PassManager.h"
namespace llvm {
class Module;
class ModulePass;
class Pass;
class raw_ostream;
/// Create and return a pass that writes the module to the specified
/// ostream. Note that this pass is designed for use with the legacy pass
/// manager.
///
/// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
/// reproduced when deserialized.
///
/// If \c EmitSummaryIndex, emit the summary index (currently for use in ThinLTO
/// optimization).
///
/// If \c EmitModuleHash, compute and emit the module hash in the bitcode
/// (currently for use in ThinLTO incremental build).
ModulePass *createBitcodeWriterPass(raw_ostream &Str,
bool ShouldPreserveUseListOrder = false,
bool EmitSummaryIndex = false,
bool EmitModuleHash = false);
/// Check whether a pass is a BitcodeWriterPass.
bool isBitcodeWriterPass(Pass *P);
/// Pass for writing a module of IR out to a bitcode file.
///
/// Note that this is intended for use with the new pass manager. To construct
/// a pass for the legacy pass manager, use the function above.
class BitcodeWriterPass : public PassInfoMixin<BitcodeWriterPass> {
raw_ostream &OS;
bool ShouldPreserveUseListOrder;
bool EmitSummaryIndex;
bool EmitModuleHash;
public:
/// Construct a bitcode writer pass around a particular output stream.
///
/// If \c ShouldPreserveUseListOrder, encode use-list order so it can be
/// reproduced when deserialized.
///
/// If \c EmitSummaryIndex, emit the summary index (currently
/// for use in ThinLTO optimization).
explicit BitcodeWriterPass(raw_ostream &OS,
bool ShouldPreserveUseListOrder = false,
bool EmitSummaryIndex = false,
bool EmitModuleHash = false)
: OS(OS), ShouldPreserveUseListOrder(ShouldPreserveUseListOrder),
EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) {}
/// Run the bitcode writer pass, and output the module to the selected
/// output stream.
PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
};
}
#endif
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