mirror of
https://github.com/RPCSX/llvm.git
synced 2026-01-31 01:05:23 +01:00
72b0e155fd
Summary:
Currently llvm::SplitModule as the first step globalizes all local objects, which might not be desirable in some scenarios.
This change adds a new flag to llvm::SplitModule that uses SCC approach to search for a balanced partition without the need to externalize symbols.
Such partition might not be possible or fully balanced for a given number of partitions, and is a function of the module properties (global/local dependencies within the module).
Joint development Tobias Edler von Koch (tobias@codeaurora.org) and Sergei Larin (slarin@codeaurora.org)
Subscribers: llvm-commits, joker.eph
Differential Revision: http://reviews.llvm.org/D16124
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258083 91177308-0d34-0410-b5e6-96231b3b80d8
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//===- SplitModule.h - Split a module into partitions -----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the function llvm::SplitModule, which splits a module
|
|
// into multiple linkable partitions. It can be used to implement parallel code
|
|
// generation for link-time optimization.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
|
|
#define LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
|
|
|
|
#include <functional>
|
|
#include <memory>
|
|
|
|
namespace llvm {
|
|
|
|
class Module;
|
|
class StringRef;
|
|
|
|
/// Splits the module M into N linkable partitions. The function ModuleCallback
|
|
/// is called N times passing each individual partition as the MPart argument.
|
|
///
|
|
/// FIXME: This function does not deal with the somewhat subtle symbol
|
|
/// visibility issues around module splitting, including (but not limited to):
|
|
///
|
|
/// - Internal symbols should not collide with symbols defined outside the
|
|
/// module.
|
|
/// - Internal symbols defined in module-level inline asm should be visible to
|
|
/// each partition.
|
|
void SplitModule(
|
|
std::unique_ptr<Module> M, unsigned N,
|
|
std::function<void(std::unique_ptr<Module> MPart)> ModuleCallback,
|
|
bool PreserveLocals = false);
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|