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Fix a mistake in my previous change r105437: don't access operand 2 and assume

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that it is an immediate before checking that the instruction is an
EXTRACT_SUBREG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105585 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-06-07 23:48:46 +00:00
parent 4af55a9164
commit 66dc4e2acd
1 changed files with 2 additions and 3 deletions
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5
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -1178,17 +1178,16 @@ TwoAddressInstructionPass::CoalesceExtSubRegs(SmallVector<unsigned,4> &Srcs,
UI = MRI->use_nodbg_begin(SrcReg),
UE = MRI->use_nodbg_end(); UI != UE; ++UI) {
MachineInstr *UseMI = &*UI;
unsigned SubRegIdx = UseMI->getOperand(2).getImm();
// FIXME: For now require that the destination subregs match the subregs
// being extracted.
if (!UseMI->isExtractSubreg() ||
UseMI->getOperand(0).getReg() != DstReg ||
UseMI->getOperand(0).getSubReg() != SubRegIdx ||
UseMI->getOperand(0).getSubReg() != UseMI->getOperand(2).getImm() ||
UseMI->getOperand(1).getSubReg() != 0) {
CanCoalesce = false;
break;
}
SubIndices.push_back(SubRegIdx);
SubIndices.push_back(UseMI->getOperand(2).getImm());
}
if (!CanCoalesce || SubIndices.size() < 2)