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[X86] Use isNullConstant helper. NFCI.
author
Simon Pilgrim
<llvm-dev@redking.me.uk>
Wed, 1 Aug 2018 13:06:14 +0000
(13:06 +0000)
committer
Simon Pilgrim
<llvm-dev@redking.me.uk>
Wed, 1 Aug 2018 13:06:14 +0000
(13:06 +0000)
llvm-svn: 338530
llvm/lib/Target/X86/X86ISelLowering.cpp
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diff --git
a/llvm/lib/Target/X86/X86ISelLowering.cpp
b/llvm/lib/Target/X86/X86ISelLowering.cpp
index
981bb17
..
2820004
100644
(file)
--- a/
llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/
llvm/lib/Target/X86/X86ISelLowering.cpp
@@
-39472,8
+39472,7
@@
static SDValue combineInsertSubvector(SDNode *N, SelectionDAG &DAG,
if ((IdxVal == OpVT.getVectorNumElements() / 2) &&
Vec.getOpcode() == ISD::INSERT_SUBVECTOR &&
OpVT.getSizeInBits() == SubVecVT.getSizeInBits() * 2) {
- auto *Idx2 = dyn_cast<ConstantSDNode>(Vec.getOperand(2));
- if (Idx2 && Idx2->getZExtValue() == 0) {
+ if (isNullConstant(Vec.getOperand(2))) {
SDValue SubVec2 = Vec.getOperand(1);
// If needed, look through bitcasts to get to the load.
if (auto *FirstLd = dyn_cast<LoadSDNode>(peekThroughBitcasts(SubVec2))) {