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[SelectionDAG] Use isa to silence unused variable warning (NFC).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316257 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Florian Hahn 2017-10-21 04:57:03 +00:00
parent ba5255623c
commit 34f57ff3e8
1 changed files with 1 additions and 1 deletions
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lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2966,7 +2966,7 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, const APInt &DemandedElts,
unsigned Tmp, Tmp2;
unsigned FirstAnswer = 1;
if (auto *C = dyn_cast<ConstantSDNode>(Op)) {
if (isa<ConstantSDNode>(Op)) {
const APInt &Val = cast<ConstantSDNode>(Op)->getAPIntValue();
return Val.getNumSignBits();
}