Commit 53a422c2 authored by Tanya Lattner's avatar Tanya Lattner
Browse files

Merge from mainline. 

Fix a bug in SelectScalarSSELoad. Since the load is wrapped in a
SCALAR_TO_VECTOR, even if the hasOneUse() check pass we may end up folding
the load into two instructions. Make sure we check the SCALAR_TO_VECTOR
has only one use as well.

llvm-svn: 31648
parent 1a5b3848

llvm/lib/Target/X86/X86ISelDAGToDAG.cpp

+1 −0
Original line number Diff line number Diff line
@@ -814,6 +814,7 @@ bool X86DAGToDAGISel::SelectScalarSSELoad(SDOperand Root, SDOperand Pred, 
    InChain = N.getOperand(0).getValue(1);

    if (ISD::isNON_EXTLoad(InChain.Val) &&

        InChain.getValue(0).hasOneUse() &&

	N.hasOneUse() &&

        CanBeFoldedBy(N.Val, Pred.Val, Root.Val)) {

      LoadSDNode *LD = cast<LoadSDNode>(InChain);

      if (!SelectAddr(LD->getBasePtr(), Base, Scale, Index, Disp))