MachineCycleAnalysis.h

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//===- MachineCycleAnalysis.h - Cycle Info for Machine IR -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the MachineCycleInfo class, which is a thin wrapper over
// the Machine IR instance of GenericCycleInfo.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
#define LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
 
#include "llvm/ADT/GenericCycleInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineSSAContext.h"
 
namespace llvm {
 
extern template class GenericCycleInfo<MachineSSAContext>;
extern template class GenericCycle<MachineSSAContext>;
 
using MachineCycleInfo = GenericCycleInfo<MachineSSAContext>;
using MachineCycle = MachineCycleInfo::CycleT;
 
/// Legacy analysis pass which computes a \ref MachineCycleInfo.
class MachineCycleInfoWrapperPass : public MachineFunctionPass {
  MachineFunction *F = nullptr;
  MachineCycleInfo CI;
 
public:
  static char ID;
 
  MachineCycleInfoWrapperPass();
 
  MachineCycleInfo &getCycleInfo() { return CI; }
  const MachineCycleInfo &getCycleInfo() const { return CI; }
 
  bool runOnMachineFunction(MachineFunction &F) override;
  void getAnalysisUsage(AnalysisUsage &AU) const override;
  void releaseMemory() override;
  void print(raw_ostream &OS, const Module *M = nullptr) const override;
};
 
// TODO: add this function to GenericCycle template after implementing IR
//       version.
bool isCycleInvariant(const MachineCycle *Cycle, MachineInstr &I);
 
} // end namespace llvm
 
#endif // LLVM_CODEGEN_MACHINECYCLEANALYSIS_H