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If both operands are loads from stores in memory we can't use movlpd/movlps

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since one needs to be a register operand. Just use movss instead of forcing
an operand into a register.

Fixes PR9239


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126072 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2011-02-20 05:04:42 +00:00
parent ebccf0891a
commit 893a882d09
1 changed files with 4 additions and 0 deletions
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4
lib/Target/X86/X86ISelLowering.cpp
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@ -5472,6 +5472,10 @@ SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
CanFoldLoad = true;
// Both of them can't be memory operations though.
if (MayFoldVectorLoad(V1) && MayFoldVectorLoad(V2))
CanFoldLoad = false;
if (CanFoldLoad) {
if (HasSSE2 && NumElems == 2)
return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);