https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90693
Piotr Siupa <piotrsiupa at gmail dot com> changed:
What |Removed |Added
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CC| |piotrsiupa at gmail dot com
--- Comment #8 from Piotr Siupa <piotrsiupa at gmail dot com> ---
I did a benchmark and (x & (x-1)) == 0 and it seems to be about 2x as fast as
the currently generated code (at least on my AMD64 processor).
Maybe it should be used if x is guaranteed to not be zero, e.g. if (x == 0)
std::unreachable().
