llvm/llvm/include/llvm/CodeGen/MachineSSAUpdater.h

//===- MachineSSAUpdater.h - Unstructured SSA Update Tool -------*- 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 declares the MachineSSAUpdater class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_MACHINESSAUPDATER_H
#define LLVM_CODEGEN_MACHINESSAUPDATER_H

#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Register.h"

namespace llvm {

class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class MachineOperand;
class MachineRegisterInfo;
class TargetInstrInfo;
class TargetRegisterClass;
template<typename T> class SmallVectorImpl;
template<typename T> class SSAUpdaterTraits;

/// MachineSSAUpdater - This class updates SSA form for a set of virtual
/// registers defined in multiple blocks.  This is used when code duplication
/// or another unstructured transformation wants to rewrite a set of uses of one
/// vreg with uses of a set of vregs.
class MachineSSAUpdater { … };

} // end namespace llvm

#endif // LLVM_CODEGEN_MACHINESSAUPDATER_H