https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65965
--- Comment #4 from alalaw01 at gcc dot gnu.org ---
(In reply to Richard Biener from comment #3)
> Fixed for GCC 6.
Indeed. I note that the same testcase does _not_ SLP/vectorize if I use
consecutive indices:
void
test (int*__restrict a, int*__restrict b)
{
a[0] = b[0];
a[1] = b[1];
a[2] = b[2];
a[3] = b[3];
a[4] = 0;
a[5] = 0;
a[6] = 0;
a[7] = 0;
}
loop26a.c:6:13: note: Build SLP failed: different operation in stmt MEM[(int
*)a
_4(D) + 28B] = 0;
loop26a.c:6:13: note: original stmt *a_4(D) = _3;
loop26a.c:6:13: note: === vect_slp_analyze_data_ref_dependences ===
loop26a.c:6:13: note: === vect_slp_analyze_operations ===
loop26a.c:6:13: note: not vectorized: bad operation in basic block.
Worth another bug?
