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ARM: Don't assume an SDNode is a constant.
Before accessing a node as a ConstandSDNode, make sure it actually is one. No testcase of non-trivial size. rdar://11948669 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160735 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -4271,6 +4271,10 @@ SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
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// Record this extraction against the appropriate vector if possible...
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SDValue SourceVec = V.getOperand(0);
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// If the element number isn't a constant, we can't effectively
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// analyze what's going on.
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if (!isa<ConstantSDNode>(V.getOperand(1)))
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return SDValue();
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unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
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bool FoundSource = false;
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for (unsigned j = 0; j < SourceVecs.size(); ++j) {
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