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//===- SplitModule.h - Split a module into partitions -----------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// 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 "llvm/ADT/STLFunctionalExtras.h"

#include <memory>

namespace llvm {

class Module;

/// 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(

    Module &M, unsigned N,

    function_ref<void(std::unique_ptr<Module> MPart)> ModuleCallback,

    bool PreserveLocals = false);

} // end namespace llvm

#endif // LLVM_TRANSFORMS_UTILS_SPLITMODULE_H