/3rd_party/llvm/include/llvm/CodeGen/ProcessImplicitDefs.h
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1//===-------------- llvm/CodeGen/ProcessImplicitDefs.h ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10 11#ifndef LLVM_CODEGEN_PROCESSIMPLICITDEFS_H 12#define LLVM_CODEGEN_PROCESSIMPLICITDEFS_H 13 14#include "llvm/CodeGen/MachineFunctionPass.h" 15#include "llvm/ADT/SmallSet.h" 16 17namespace llvm { 18 19 class MachineInstr; 20 class TargetInstrInfo; 21 class TargetRegisterInfo; 22 class MachineRegisterInfo; 23 class LiveVariables; 24 25 /// Process IMPLICIT_DEF instructions and make sure there is one implicit_def 26 /// for each use. Add isUndef marker to implicit_def defs and their uses. 27 class ProcessImplicitDefs : public MachineFunctionPass { 28 const TargetInstrInfo *TII; 29 const TargetRegisterInfo *TRI; 30 MachineRegisterInfo *MRI; 31 LiveVariables *LV; 32 33 bool CanTurnIntoImplicitDef(MachineInstr *MI, unsigned Reg, 34 unsigned OpIdx, 35 SmallSet<unsigned, 8> &ImpDefRegs); 36 37 public: 38 static char ID; 39 40 ProcessImplicitDefs() : MachineFunctionPass(ID) { 41 initializeProcessImplicitDefsPass(*PassRegistry::getPassRegistry()); 42 } 43 44 virtual void getAnalysisUsage(AnalysisUsage &au) const; 45 46 virtual bool runOnMachineFunction(MachineFunction &fn); 47 }; 48 49} 50 51#endif // LLVM_CODEGEN_PROCESSIMPLICITDEFS_H