llvm/llvm/include/llvm/CodeGen/AntiDepBreaker.h

//===- llvm/CodeGen/AntiDepBreaker.h - Anti-Dependence Breaking -*- 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 implements the AntiDepBreaker class, which implements
// anti-dependence breaking heuristics for post-register-allocation scheduling.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_ANTIDEPBREAKER_H
#define LLVM_CODEGEN_ANTIDEPBREAKER_H

#include "llvm/ADT/iterator_range.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/Support/Compiler.h"
#include <utility>
#include <vector>

namespace llvm {

class RegisterClassInfo;

/// This class works in conjunction with the post-RA scheduler to rename
/// registers to break register anti-dependencies (WAR hazards).
class AntiDepBreaker { … };

AntiDepBreaker *createAggressiveAntiDepBreaker(
    MachineFunction &MFi, const RegisterClassInfo &RCI,
    TargetSubtargetInfo::RegClassVector &CriticalPathRCs);

AntiDepBreaker *createCriticalAntiDepBreaker(MachineFunction &MFi,
                                             const RegisterClassInfo &RCI);

} // end namespace llvm

#endif // LLVM_CODEGEN_ANTIDEPBREAKER_H