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Summary: If one side simplifies to the identity value for inner opcode, we can replace the value with just the operation that can't be simplified. I've removed a couple now unneeded special cases in visitAnd and visitOr. There are probably other cases I missed. Reviewers: spatel, majnemer, hfinkel, dberlin Reviewed By: spatel Subscribers: grandinj, llvm-commits, spatel Differential Revision: https://reviews.llvm.org/D35451 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308111 91177308-0d34-0410-b5e6-96231b3b80d8
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