1//===- SplitModule.h - Split a module into partitions -----------*- 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 file defines the function llvm::SplitModule, which splits a module
10// into multiple linkable partitions. It can be used to implement parallel code
11// generation for link-time optimization.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
16#define LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
17
18#include "llvm/ADT/STLExtras.h"
19#include <memory>
20
21namespace llvm {
22
23class Module;
24
25/// Splits the module M into N linkable partitions. The function ModuleCallback
26/// is called N times passing each individual partition as the MPart argument.
27///
28/// FIXME: This function does not deal with the somewhat subtle symbol
29/// visibility issues around module splitting, including (but not limited to):
30///
31/// - Internal symbols should not collide with symbols defined outside the
32/// module.
33/// - Internal symbols defined in module-level inline asm should be visible to
34/// each partition.
35void SplitModule(
36 Module &M, unsigned N,
37 function_ref<void(std::unique_ptr<Module> MPart)> ModuleCallback,
38 bool PreserveLocals = false);
39
40} // end namespace llvm
41
42#endif // LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
43