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//===-- llvm/CodeGen/ParallelCG.h - Parallel code generation ----*- C++ -*-===//
//                     The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This header declares functions that can be used for parallel code generation.


#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Target/TargetMachine.h"

namespace llvm {

class Module;
class TargetOptions;
class raw_pwrite_stream;

/// Split M into OSs.size() partitions, and generate code for each. Writes
/// OSs.size() output files to the output streams in OSs. The resulting output
/// files if linked together are intended to be equivalent to the single output
/// file that would have been code generated from M.
/// \returns M if OSs.size() == 1, otherwise returns std::unique_ptr<Module>().
splitCodeGen(std::unique_ptr<Module> M, ArrayRef<raw_pwrite_stream *> OSs,
             StringRef CPU, StringRef Features, const TargetOptions &Options,
             Reloc::Model RM = Reloc::Default,
             CodeModel::Model CM = CodeModel::Default,
             CodeGenOpt::Level OL = CodeGenOpt::Default,
             TargetMachine::CodeGenFileType FT = TargetMachine::CGFT_ObjectFile);

} // namespace llvm