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Detect and handle COPY in many places.

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This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107547 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-07-03 00:04:37 +00:00
parent 43b8fd728b
commit 273f7e4299
10 changed files with 73 additions and 40 deletions
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5
lib/CodeGen/OptimizePHIs.cpp
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@ -107,6 +107,11 @@ bool OptimizePHIs::IsSingleValuePHICycle(MachineInstr *MI,
SrcSubIdx == 0 && DstSubIdx == 0 &&
TargetRegisterInfo::isVirtualRegister(MvSrcReg))
SrcMI = MRI->getVRegDef(MvSrcReg);
else if (SrcMI && SrcMI->isCopy() &&
!SrcMI->getOperand(0).getSubReg() &&
!SrcMI->getOperand(1).getSubReg() &&
TargetRegisterInfo::isVirtualRegister(SrcMI->getOperand(1).getReg()))
SrcMI = MRI->getVRegDef(SrcMI->getOperand(1).getReg());
if (!SrcMI)
return false;