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a1129621dd
We may be in a situation where the icmps might not be near each other in a tree of or instructions. Try to dig out related compare instructions and see if they combine. N.B. This won't fire on deep trees of compares because rewritting the tree might end up creating a net increase of IR. We may have to resort to something more sophisticated if this is a real problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222928 91177308-0d34-0410-b5e6-96231b3b80d8
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