http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57668
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-06-24
CC| |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
memcpy_byte.c:2: note: Completely unroll loop 14 times
the new unrolling code unrolls the epilogue loop completely:
Estimating sizes for loop 3
BB: 8, after_exit: 0
size: 0 i.0_40 = (sizetype) i_38;
size: 1 _41 = s_7(D) + i.0_40;
size: 1 _42 = d_9(D) + i.0_40;
size: 1 _43 = *_42;
size: 1 *_41 = _43;
size: 1 i_45 = i_38 + 1;
size: 2 if (i_45 < _16)
Exit condition will be eliminated in last copy.
BB: 9, after_exit: 1
size: 7-0, last_iteration: 7-2
Loop size: 7
Estimated size after unrolling: 68
And loop distribution fails to detect the memcpy clone, too.
