LLVM  9.0.0svn
SplitModule.h
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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 
21 namespace llvm {
22 
23 class 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.
35 void SplitModule(
36  std::unique_ptr<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
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void SplitModule(std::unique_ptr< Module > M, unsigned N, function_ref< void(std::unique_ptr< Module > MPart)> ModuleCallback, bool PreserveLocals=false)
Splits the module M into N linkable partitions.
#define N