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//== llvm/CodeGen/GlobalISel/CombinerHelper.h -------------- -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===--------------------------------------------------------------------===//
//
/// This contains common combine transformations that may be used in a combine
/// pass,or by the target elsewhere.
/// Targets can pick individual opcode transformations from the helper or use
/// tryCombine which invokes all transformations. All of the transformations
/// return true if the MachineInstruction changed and false otherwise.
//
//===--------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_HELPER_H
#define LLVM_CODEGEN_GLOBALISEL_COMBINER_HELPER_H
namespace llvm {
class MachineIRBuilder;
class MachineRegisterInfo;
class MachineInstr;
class CombinerHelper {
MachineIRBuilder &Builder;
MachineRegisterInfo &MRI;
public:
CombinerHelper(MachineIRBuilder &B);
/// If \p MI is COPY, try to combine it.
/// Returns true if MI changed.
bool tryCombineCopy(MachineInstr &MI);
/// Try to transform \p MI by using all of the above
/// combine functions. Returns true if changed.
bool tryCombine(MachineInstr &MI);
};
} // namespace llvm
#endif
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