If movl top bits are undef, let it be selected to movlps, etc.

llvm-svn: 50928
2008-05-10 00:58:41 +00:00 · 2008-05-10 00:58:41 +00:00 · bb48d55a88
parent bec201fa06
commit bb48d55a88
1 changed files with 1 additions and 2 deletions
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@ -6326,8 +6326,7 @@ static SDOperand PerformBuildVectorCombine(SDNode *N, SelectionDAG &DAG,
    return SDOperand();
  // This must be an insertion into a zero vector.
  SDOperand HighElt = N->getOperand(1);
-  if (HighElt.getOpcode() != ISD::UNDEF &&
-      !isZeroNode(HighElt))
+  if (!isZeroNode(HighElt))
    return SDOperand();

  // Value must be a load.