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//===- MIRParser.h - MIR serialization format parser ------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This MIR serialization library is currently a work in progress. It can't
// serialize machine functions at this time.
//
// This file declares the functions that parse the MIR serialization format
// files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MIRPARSER_MIRPARSER_H
#define LLVM_CODEGEN_MIRPARSER_MIRPARSER_H
#include "llvm/IR/Module.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>
namespace llvm {
class StringRef;
class MIRParserImpl;
class MachineModuleInfo;
class SMDiagnostic;
/// This class initializes machine functions by applying the state loaded from
/// a MIR file.
class MIRParser {
std::unique_ptr<MIRParserImpl> Impl;
public:
MIRParser(std::unique_ptr<MIRParserImpl> Impl);
MIRParser(const MIRParser &) = delete;
~MIRParser();
/// Parses the optional LLVM IR module in the MIR file.
///
/// A new, empty module is created if the LLVM IR isn't present.
/// \returns nullptr if a parsing error occurred.
std::unique_ptr<Module> parseIRModule();
/// Parses MachineFunctions in the MIR file and add them to the given
/// MachineModuleInfo \p MMI.
///
/// \returns true if an error occurred.
bool parseMachineFunctions(Module &M, MachineModuleInfo &MMI);
};
/// This function is the main interface to the MIR serialization format parser.
///
/// It reads in a MIR file and returns a MIR parser that can parse the embedded
/// LLVM IR module and initialize the machine functions by parsing the machine
/// function's state.
///
/// \param Filename - The name of the file to parse.
/// \param Error - Error result info.
/// \param Context - Context which will be used for the parsed LLVM IR module.
std::unique_ptr<MIRParser> createMIRParserFromFile(StringRef Filename,
SMDiagnostic &Error,
LLVMContext &Context);
/// This function is another interface to the MIR serialization format parser.
///
/// It returns a MIR parser that works with the given memory buffer and that can
/// parse the embedded LLVM IR module and initialize the machine functions by
/// parsing the machine function's state.
///
/// \param Contents - The MemoryBuffer containing the machine level IR.
/// \param Context - Context which will be used for the parsed LLVM IR module.
std::unique_ptr<MIRParser>
createMIRParser(std::unique_ptr<MemoryBuffer> Contents, LLVMContext &Context);
} // end namespace llvm
#endif // LLVM_CODEGEN_MIRPARSER_MIRPARSER_H
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