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 using MachineCycleInfo = GenericCycleInfo<MachineSSAContext>;
24 using MachineCycle = MachineCycleInfo::CycleT;
25 
26 /// Legacy analysis pass which computes a \ref MachineCycleInfo.
27 class MachineCycleInfoWrapperPass : public MachineFunctionPass {
28   MachineFunction *F = nullptr;
29   MachineCycleInfo CI;
30 
31 public:
32   static char ID;
33 
34   MachineCycleInfoWrapperPass();
35 
36   MachineCycleInfo &getCycleInfo() { return CI; }
37   const MachineCycleInfo &getCycleInfo() const { return CI; }
38 
39   bool runOnMachineFunction(MachineFunction &F) override;
40   void getAnalysisUsage(AnalysisUsage &AU) const override;
41   void releaseMemory() override;
42   void print(raw_ostream &OS, const Module *M = nullptr) const override;
43 };
44 
45 // TODO: add this function to GenericCycle template after implementing IR
46 //       version.
47 bool isCycleInvariant(const MachineCycle *Cycle, MachineInstr &I);
48 
49 } // end namespace llvm
50 
51 #endif // LLVM_CODEGEN_MACHINECYCLEANALYSIS_H
52