Craig Topper 73ba1c84be [InstCombine][InstSimplify] Use APInt::isNullValue/isOneValue to reduce compiled code for comparing APInts with 0 and 1. NFC ...

These methods are specifically optimized to only counting leading zeros without an additional uint64_t compare.

llvm-svn: 304876

2017-06-07 07:40:37 +00:00

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