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bitwidth op back to the original size. If we reduce ANDs then this can cause an endless loop. This patch changes the ZEXT to ANY_EXTEND if the demanded bits are equal or smaller than the size of the reduced operation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170505 91177308-0d34-0410-b5e6-96231b3b80d8
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