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b17df8b4d7
We would infinite loop because we created a shufflevector that was wider than needed and then failed to combine that with the insertelement. When subsequently visiting the extractelement from that shuffle, we see that it's unnecessary, delete it, and trigger another visit to the insertelement. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@259236 91177308-0d34-0410-b5e6-96231b3b80d8
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