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Properly transfer kill / dead info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31765 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2006-11-15 20:58:11 +00:00
parent ddd2a4556a
commit 6ce7dc2a97
6 changed files with 82 additions and 41 deletions
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7
lib/Target/Alpha/AlphaRegisterInfo.cpp
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@@ -104,6 +104,7 @@ MachineInstr *AlphaRegisterInfo::foldMemoryOperand(MachineInstr *MI,
// Make sure this is a reg-reg copy.
unsigned Opc = MI->getOpcode();
MachineInstr *NewMI = NULL;
switch(Opc) {
default:
break;
@@ -115,18 +116,20 @@ MachineInstr *AlphaRegisterInfo::foldMemoryOperand(MachineInstr *MI,
unsigned InReg = MI->getOperand(1).getReg();
Opc = (Opc == Alpha::BISr) ? Alpha::STQ :
((Opc == Alpha::CPYSS) ? Alpha::STS : Alpha::STT);
return BuildMI(TII, Opc, 3).addReg(InReg).addFrameIndex(FrameIndex)
NewMI = BuildMI(TII, Opc, 3).addReg(InReg).addFrameIndex(FrameIndex)
.addReg(Alpha::F31);
} else { // load -> move
unsigned OutReg = MI->getOperand(0).getReg();
Opc = (Opc == Alpha::BISr) ? Alpha::LDQ :
((Opc == Alpha::CPYSS) ? Alpha::LDS : Alpha::LDT);
return BuildMI(TII, Opc, 2, OutReg).addFrameIndex(FrameIndex)
NewMI = BuildMI(TII, Opc, 2, OutReg).addFrameIndex(FrameIndex)
.addReg(Alpha::F31);
}
}
break;
}
if (NewMI)
NewMI->copyKillDeadInfo(MI);
return 0;
}