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If part of the mask is "undef", then ignore it as we don't care what goes into it.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55147 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2008-08-21 22:36:36 +00:00
parent e85dc49e13
commit ae0218c914
1 changed files with 2 additions and 0 deletions
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2
lib/Target/X86/X86ISelLowering.cpp
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@ -3479,6 +3479,8 @@ SDValue LowerVECTOR_SHUFFLEv8i16(SDValue V1, SDValue V2,
if (InOrder[i])
continue;
SDValue Elt = MaskElts[i];
if (Elt.getOpcode() == ISD::UNDEF)
continue;
unsigned EltIdx = cast<ConstantSDNode>(Elt)->getValue();
SDValue ExtOp = (EltIdx < 8)
? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, V1,