llvm/CodeGen/RegAllocFast.h

0001 //==- RegAllocFast.h ----------- fast register allocator  ----------*-C++-*-==//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CODEGEN_REGALLOCFAST_H
0010 #define LLVM_CODEGEN_REGALLOCFAST_H
0011
0012 #include "llvm/CodeGen/MachinePassManager.h"
0013 #include "llvm/CodeGen/RegAllocCommon.h"
0014
0015 namespace llvm {
0016
0017 struct RegAllocFastPassOptions {
0018   RegAllocFilterFunc Filter = nullptr;
0019   StringRef FilterName = "all";
0020   bool ClearVRegs = true;
0021 };
0022
0023 class RegAllocFastPass : public PassInfoMixin<RegAllocFastPass> {
0024   RegAllocFastPassOptions Opts;
0025
0026 public:
0027   RegAllocFastPass(RegAllocFastPassOptions Opts = RegAllocFastPassOptions())
0028       : Opts(Opts) {}
0029
0030   MachineFunctionProperties getRequiredProperties() const {
0031     return MachineFunctionProperties().set(
0032         MachineFunctionProperties::Property::NoPHIs);
0033   }
0034
0035   MachineFunctionProperties getSetProperties() const {
0036     if (Opts.ClearVRegs) {
0037       return MachineFunctionProperties().set(
0038           MachineFunctionProperties::Property::NoVRegs);
0039     }
0040
0041     return MachineFunctionProperties();
0042   }
0043
0044   MachineFunctionProperties getClearedProperties() const {
0045     return MachineFunctionProperties().set(
0046         MachineFunctionProperties::Property::IsSSA);
0047   }
0048
0049   PreservedAnalyses run(MachineFunction &MF, MachineFunctionAnalysisManager &);
0050
0051   void printPipeline(raw_ostream &OS,
0052                      function_ref<StringRef(StringRef)> MapClassName2PassName);
0053
0054   static bool isRequired() { return true; }
0055 };
0056
0057 } // namespace llvm
0058
0059 #endif // LLVM_CODEGEN_REGALLOCFAST_H