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6ca2d8b7c7
In unreachable blocks it's legal to have instructions like "%x = op %x". Such instuctions are not schedulable. Therefore the SLPVectorizer has to check for unreachable blocks and ignore them. Fixes bug 20646. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216256 91177308-0d34-0410-b5e6-96231b3b80d8
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