| //== 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 |