1 //==- RegAllocFast.h ----------- fast register allocator ----------*-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 #ifndef LLVM_CODEGEN_REGALLOCFAST_H 10 #define LLVM_CODEGEN_REGALLOCFAST_H 11 12 #include "llvm/CodeGen/MachinePassManager.h" 13 #include "llvm/CodeGen/RegAllocCommon.h" 14 15 namespace llvm { 16 17 struct RegAllocFastPassOptions { 18 RegAllocFilterFunc Filter = nullptr; 19 StringRef FilterName = "all"; 20 bool ClearVRegs = true; 21 }; 22 23 class RegAllocFastPass : public PassInfoMixin<RegAllocFastPass> { 24 RegAllocFastPassOptions Opts; 25 26 public: 27 RegAllocFastPass(RegAllocFastPassOptions Opts = RegAllocFastPassOptions()) 28 : Opts(Opts) {} 29 30 MachineFunctionProperties getRequiredProperties() const { 31 return MachineFunctionProperties().set( 32 MachineFunctionProperties::Property::NoPHIs); 33 } 34 35 MachineFunctionProperties getSetProperties() const { 36 if (Opts.ClearVRegs) { 37 return MachineFunctionProperties().set( 38 MachineFunctionProperties::Property::NoVRegs); 39 } 40 41 return MachineFunctionProperties(); 42 } 43 44 MachineFunctionProperties getClearedProperties() const { 45 return MachineFunctionProperties().set( 46 MachineFunctionProperties::Property::IsSSA); 47 } 48 49 PreservedAnalyses run(MachineFunction &MF, MachineFunctionAnalysisManager &); 50 51 void printPipeline(raw_ostream &OS, 52 function_ref<StringRef(StringRef)> MapClassName2PassName); 53 54 static bool isRequired() { return true; } 55 }; 56 57 } // namespace llvm 58 59 #endif // LLVM_CODEGEN_REGALLOCFAST_H 60