ParallelCG.h revision 360784 
1//===-- llvm/CodeGen/ParallelCG.h - Parallel code generation ----*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This header declares functions that can be used for parallel code generation.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CODEGEN_PARALLELCG_H
14#define LLVM_CODEGEN_PARALLELCG_H
15
16#include "llvm/Support/CodeGen.h"
17#include "llvm/Target/TargetMachine.h"
18
19#include <functional>
20
21namespace llvm {
22
23template <typename T> class ArrayRef;
24class Module;
25class TargetOptions;
26class raw_pwrite_stream;
27
28/// Split M into OSs.size() partitions, and generate code for each. Takes a
29/// factory function for the TargetMachine TMFactory. Writes OSs.size() output
30/// files to the output streams in OSs. The resulting output files if linked
31/// together are intended to be equivalent to the single output file that would
32/// have been code generated from M.
33///
34/// Writes bitcode for individual partitions into output streams in BCOSs, if
35/// BCOSs is not empty.
36///
37/// \returns M if OSs.size() == 1, otherwise returns std::unique_ptr<Module>().
38std::unique_ptr<Module>
39splitCodeGen(std::unique_ptr<Module> M, ArrayRef<raw_pwrite_stream *> OSs,
40             ArrayRef<llvm::raw_pwrite_stream *> BCOSs,
41             const std::function<std::unique_ptr<TargetMachine>()> &TMFactory,
42             CodeGenFileType FileType = CGFT_ObjectFile,
43             bool PreserveLocals = false);
44
45} // namespace llvm
46
47#endif
48