https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92578
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-19
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With newcnt-=2 you get
movl %edx, %r8d
movl %esi, %eax
leal -2(%rsi), %edx
cmpl %r8d, %edi
cmove %edx, %eax
ret
so it's if-conversions preference to generate setCC which I'm not sure is
really worse here, is it? We're saving a zero extend and some reg-reg moves.
I'm sure we have a duplicate report about this.
