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Only collect subreg extracting copies for later coalescing.

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This also avoids fatal copies from physregs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108061 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-07-10 22:42:53 +00:00
parent a8dab36f3d
commit c0075cce7c
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -1434,7 +1434,7 @@ bool TwoAddressInstructionPass::EliminateRegSequences() {
IsImpDef = false;
// Remember COPY sources. These might be candidate for coalescing.
if (DefMI->isCopy())
if (DefMI->isCopy() && DefMI->getOperand(1).getSubReg())
RealSrcs.push_back(DefMI->getOperand(1).getReg());
if (!Seen.insert(SrcReg) ||