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[DAG] DAGCombiner::XformToShuffleWithZero - use APInt::extractBits helper. NFCI.

This commit is contained in:
Simon Pilgrim 2020-01-06 10:42:48 +00:00
parent 89b1184325
commit 6fa6000e3e
1 changed files with 4 additions and 8 deletions
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12
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -19786,14 +19786,10 @@ SDValue DAGCombiner::XformToShuffleWithZero(SDNode *N) {
return SDValue();
// Extract the sub element from the constant bit mask.
if (DAG.getDataLayout().isBigEndian()) {
Bits.lshrInPlace((Split - SubIdx - 1) * NumSubBits);
} else {
Bits.lshrInPlace(SubIdx * NumSubBits);
}
if (Split > 1)
Bits = Bits.trunc(NumSubBits);
if (DAG.getDataLayout().isBigEndian())
Bits = Bits.extractBits(NumSubBits, (Split - SubIdx - 1) * NumSubBits);
else
Bits = Bits.extractBits(NumSubBits, SubIdx * NumSubBits);
if (Bits.isAllOnesValue())
Indices.push_back(i);