https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92492
--- Comment #3 from Hongtao.liu ---
(In reply to Richard Biener from comment #2)
> ICC also uses effectively two vector sizes, v8qi and v8hi AFAICS? But
> why does it use %ymm then...
I think it's v8qi and v8si, icc use vpmovzxbd not vpmovzxbw.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92492
Richard Biener changed:
What|Removed |Added
Keywords||missed-optimization
Status|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92492
--- Comment #1 from Hongtao.liu ---
Much more simple case, exclude disturb of point alias and unknown loop count
cat test.c:
typedef unsigned char uint8_t;
static inline uint8_t x264_clip_uint8( int x )
{
return x&(~63) ? (-x)>>7 : x;
}
voi
