PPCInstrInfo

Definition¶

The definition of class PPCInstrInfo¶

PPCInstrInfo.cpp

C++

113 class PPCSubtarget;
114 class PPCInstrInfo : public PPCGenInstrInfo {
115   PPCSubtarget &Subtarget;
116   const PPCRegisterInfo RI;

The definition of class PPCGenInstrInfo¶

PPCGenInstrInfo.inc

C++

7910 #ifdef GET_INSTRINFO_HEADER
 7911 #undef GET_INSTRINFO_HEADER
 7912 namespace llvm {
 7913 struct PPCGenInstrInfo : public TargetInstrInfo {
 7914   explicit PPCGenInstrInfo(int CFSetupOpcode = -1, int CFDestroyOpcode = -1, int CatchRetOpcode =       -1, int ReturnOpcode = -1);
 7915   ~PPCGenInstrInfo() override = default;
 7916
 7917 };
 7918 } // end namespace llvm
 7919 #endif // GET_INSTRINFO_HEADER

PPCInstrInfo -> PPCGenInstrInfo -> TargetInstrInfo

Use¶

Most of member in PPCInstrInfo is from the TargetInstrInfo, you can see most of function has the override.

BUt there are a few member is only defined in PPCInstrInfo。

Bash

[shkzhang@recycler:~/llvm/llvm/lib/Target/PowerPC]$ grep -r "storeRegToStackSlotNoUpd"
PPCFrameLowering.cpp:          TII.storeRegToStackSlotNoUpd(MBB, MI, Reg, !IsLiveIn,
PPCInstrInfo.h:  void storeRegToStackSlotNoUpd(MachineBasicBlock &MBB,
PPCInstrInfo.cpp:void PPCInstrInfo::storeRegToStackSlotNoUpd(
PPCInstrInfo.cpp:  storeRegToStackSlotNoUpd(MBB, MI, SrcReg, isKill, FrameIdx, RC, TRI);

1. Use TargetInstrInfo¶

Only use the member definited in TargetInstrInfo.

Example: PPCBranchCoalescing.cpp¶

Define

C++

151   const TargetInstrInfo *TII;
152   MachineRegisterInfo *MRI;

Use

C++

217 void PPCBranchCoalescing::initialize(MachineFunction &MF) {
218   MDT = &getAnalysis<MachineDominatorTree>();
219   MPDT = &getAnalysis<MachinePostDominatorTree>();
220   TII = MF.getSubtarget().getInstrInfo();
221   MRI = &MF.getRegInfo();
222 }

2. Use PPCInstrInfo¶

Only use the member definited in TargetInstrInfo.

Example: PPCReduceCRLogicals.cpp¶

definition

C++

379   const PPCInstrInfo *TII = nullptr;
380   MachineFunction *MF = nullptr;
381   MachineRegisterInfo *MRI = nullptr;
382   const MachineBranchProbabilityInfo *MBPI = nullptr;

Use

C++

const TargetRegisterInfo *TRI = &TII->getRegisterInfo();

568 void PPCReduceCRLogicals::initialize(MachineFunction &MFParam) {
569   MF = &MFParam;
570   MRI = &MF->getRegInfo();
571   TII = MF->getSubtarget<PPCSubtarget>().getInstrInfo();
572   MBPI = &getAnalysis<MachineBranchProbabilityInfo>();
573
574   AllCRLogicalOps.clear();
575 }