1 //== ----- llvm/CodeGen/GlobalISel/Combiner.h -------------------*- C++ -*-== // 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// \file 9 /// This contains common code to drive combines. Combiner Passes will need to 10 /// setup a CombinerInfo and call combineMachineFunction. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CODEGEN_GLOBALISEL_COMBINER_H 15 #define LLVM_CODEGEN_GLOBALISEL_COMBINER_H 16 17 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" 18 19 namespace llvm { 20 class MachineRegisterInfo; 21 class CombinerInfo; 22 class GISelCSEInfo; 23 class TargetPassConfig; 24 class MachineFunction; 25 26 class Combiner { 27 public: 28 Combiner(CombinerInfo &CombinerInfo, const TargetPassConfig *TPC); 29 30 /// If CSEInfo is not null, then the Combiner will setup observer for 31 /// CSEInfo and instantiate a CSEMIRBuilder. Pass nullptr if CSE is not 32 /// needed. 33 bool combineMachineInstrs(MachineFunction &MF, GISelCSEInfo *CSEInfo); 34 35 protected: 36 CombinerInfo &CInfo; 37 38 MachineRegisterInfo *MRI = nullptr; 39 const TargetPassConfig *TPC; 40 std::unique_ptr<MachineIRBuilder> Builder; 41 }; 42 43 } // End namespace llvm. 44 45 #endif // LLVM_CODEGEN_GLOBALISEL_COMBINER_H 46