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| author | Michael Liao <michael.liao@intel.com> | 2012-10-23 21:40:15 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-10-23 21:40:15 +0000 |
| commit | 2843625bb520feca64c25976d2170b700216b562 (patch) | |
| tree | 84672feec50206b030a8abc69cf036cf26d57cfc /llvm/lib | |
| parent | c7b09dd1d175131f54dff237dc5d783d9128ec48 (diff) | |
| download | bcm5719-llvm-2843625bb520feca64c25976d2170b700216b562.tar.gz bcm5719-llvm-2843625bb520feca64c25976d2170b700216b562.zip | |
Fix PR14161
- Check index being extracted to be constant 0 before simplfiying.
Otherwise, retain the original sequence.
llvm-svn: 166504
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index a3973ed963f..f73b9d64b94 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -6630,9 +6630,12 @@ X86TargetLowering::lowerVectorIntExtend(SDValue Op, SelectionDAG &DAG) const { .getOperand(0).getValueType().getSizeInBits() == SignificantBits) { // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast x) SDValue V = V1.getOperand(0).getOperand(0).getOperand(0); + ConstantSDNode *CIdx = + dyn_cast<ConstantSDNode>(V1.getOperand(0).getOperand(0).getOperand(1)); // If it's foldable, i.e. normal load with single use, we will let code // selection to fold it. Otherwise, we will short the conversion sequence. - if (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse()) + if (CIdx && CIdx->getZExtValue() == 0 && + (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse())) V1 = DAG.getNode(ISD::BITCAST, DL, V1.getValueType(), V); } |
