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 // 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 #include "llvm/CodeGen/MachineFunctionPass.h" 19 20 namespace llvm { 21 class MachineRegisterInfo; 22 class CombinerInfo; 23 class GISelCSEInfo; 24 class TargetPassConfig; 25 class MachineFunction; 26 27 class Combiner { 28 public: 29 Combiner(CombinerInfo &CombinerInfo, const TargetPassConfig *TPC); 30 31 /// If CSEInfo is not null, then the Combiner will setup observer for 32 /// CSEInfo and instantiate a CSEMIRBuilder. Pass nullptr if CSE is not 33 /// needed. 34 bool combineMachineInstrs(MachineFunction &MF, GISelCSEInfo *CSEInfo); 35 36 protected: 37 CombinerInfo &CInfo; 38 39 MachineRegisterInfo *MRI = nullptr; 40 const TargetPassConfig *TPC; 41 std::unique_ptr<MachineIRBuilder> Builder; 42 }; 43 44 } // End namespace llvm. 45 46 #endif // LLVM_CODEGEN_GLOBALISEL_GICOMBINER_H 47