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  1. //===- MachineCycleAnalysis.h - Cycle Info for Machine IR -------*- 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 file defines the MachineCycleInfo class, which is a thin wrapper over
  10. // the Machine IR instance of GenericCycleInfo.
  11. //
  12. //===----------------------------------------------------------------------===//
  13.  
  14. #ifndef LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
  15. #define LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
  16.  
  17. #include "llvm/ADT/GenericCycleInfo.h"
  18. #include "llvm/CodeGen/MachineFunctionPass.h"
  19. #include "llvm/CodeGen/MachineSSAContext.h"
  20.  
  21. namespace llvm {
  22.  
  23. extern template class GenericCycleInfo<MachineSSAContext>;
  24. extern template class GenericCycle<MachineSSAContext>;
  25.  
  26. using MachineCycleInfo = GenericCycleInfo<MachineSSAContext>;
  27. using MachineCycle = MachineCycleInfo::CycleT;
  28.  
  29. /// Legacy analysis pass which computes a \ref MachineCycleInfo.
  30. class MachineCycleInfoWrapperPass : public MachineFunctionPass {
  31.   MachineFunction *F = nullptr;
  32.   MachineCycleInfo CI;
  33.  
  34. public:
  35.   static char ID;
  36.  
  37.   MachineCycleInfoWrapperPass();
  38.  
  39.   MachineCycleInfo &getCycleInfo() { return CI; }
  40.   const MachineCycleInfo &getCycleInfo() const { return CI; }
  41.  
  42.   bool runOnMachineFunction(MachineFunction &F) override;
  43.   void getAnalysisUsage(AnalysisUsage &AU) const override;
  44.   void releaseMemory() override;
  45.   void print(raw_ostream &OS, const Module *M = nullptr) const override;
  46. };
  47.  
  48. // TODO: add this function to GenericCycle template after implementing IR
  49. //       version.
  50. bool isCycleInvariant(const MachineCycle *Cycle, MachineInstr &I);
  51.  
  52. } // end namespace llvm
  53.  
  54. #endif // LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
  55.