diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp index 1a19916a57c..08f51db5af1 100644 --- a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -337,47 +337,51 @@ MachineInstr *PPCRegisterInfo::foldMemoryOperand(MachineInstr *MI, // Make sure this is a reg-reg copy. Note that we can't handle MCRF, because // it takes more than one instruction to store it. unsigned Opc = MI->getOpcode(); - + + MachineInstr *NewMI = NULL; if ((Opc == PPC::OR && MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) { if (OpNum == 0) { // move -> store unsigned InReg = MI->getOperand(1).getReg(); - return addFrameReference(BuildMI(TII, PPC::STW, - 3).addReg(InReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::STW, + 3).addReg(InReg), FrameIndex); } else { // move -> load unsigned OutReg = MI->getOperand(0).getReg(); - return addFrameReference(BuildMI(TII, PPC::LWZ, 2, OutReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::LWZ, 2, OutReg), FrameIndex); } } else if ((Opc == PPC::OR8 && MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) { if (OpNum == 0) { // move -> store unsigned InReg = MI->getOperand(1).getReg(); - return addFrameReference(BuildMI(TII, PPC::STD, - 3).addReg(InReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::STD, + 3).addReg(InReg), FrameIndex); } else { // move -> load unsigned OutReg = MI->getOperand(0).getReg(); - return addFrameReference(BuildMI(TII, PPC::LD, 2, OutReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::LD, 2, OutReg), FrameIndex); } } else if (Opc == PPC::FMRD) { if (OpNum == 0) { // move -> store unsigned InReg = MI->getOperand(1).getReg(); - return addFrameReference(BuildMI(TII, PPC::STFD, - 3).addReg(InReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::STFD, + 3).addReg(InReg), FrameIndex); } else { // move -> load unsigned OutReg = MI->getOperand(0).getReg(); - return addFrameReference(BuildMI(TII, PPC::LFD, 2, OutReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::LFD, 2, OutReg), FrameIndex); } } else if (Opc == PPC::FMRS) { if (OpNum == 0) { // move -> store unsigned InReg = MI->getOperand(1).getReg(); - return addFrameReference(BuildMI(TII, PPC::STFS, + NewMI = addFrameReference(BuildMI(TII, PPC::STFS, 3).addReg(InReg), FrameIndex); } else { // move -> load unsigned OutReg = MI->getOperand(0).getReg(); - return addFrameReference(BuildMI(TII, PPC::LFS, 2, OutReg), FrameIndex); + NewMI = addFrameReference(BuildMI(TII, PPC::LFS, 2, OutReg), FrameIndex); } } - return 0; + + if (NewMI) + NewMI->copyKillDeadInfo(MI); + return NewMI; } //===----------------------------------------------------------------------===// |
