[Bug middle-end/81657] [8 Regression] FAIL: gcc.dg/20050503-1.c scan-assembler-not call

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81657

--- Comment #12 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #10)
> (In reply to Wilco from comment #9)
> > (In reply to Jakub Jelinek from comment #8)
> > > That just means r240568 caused another regression.
> > > Again, on various targets strchr is efficient, just on a few ones it is not
> > > and the change was unfortunately done generically.
> > 
> > On practically all targets, including x64, strchr is not as efficient as
> > strlen.
> 
> Do you have data to show that?

Yes, on x64 I get these timings for a simple function containing just the
library call:

size  1024 - 13845 21025 14449 (rawmemchr/memchr/strlen)