Rajeev Misra 115ce93562 bit_util: Don't use __builtin_clz on s390x
There's an optimizer bug upstream that results in test failures; reported at
https://bugzilla.redhat.com/show_bug.cgi?id=1619354.  This works around the
failure reported at https://github.com/jemalloc/jemalloc/issues/1307.
2018-09-20 11:25:17 -07:00
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