https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102767
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot
gnu.org
Status|ASSIGNED |NEW
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
the backend says it can support misaligned V1TI via
rs6000_builtin_support_vector_misalignment:
rs6000_builtin_support_vector_misalignment (mode=E_V1TImode, type=<integer_type
0x7ffff66f41f8>,
misalignment=8, is_packed=false) at
../../src/trunk/gcc/config/rs6000/rs6000.c:5069
...
/* VSX supports word-aligned vector. */
if (misalignment % 4 == 0)
return true;
so the vectorizer classifies it as dr_unaligned_supported and we of course
are then allowed to cost the supported unaligned store but the cost
hook doesn't consider elements == 1.
Now, we probably should avoid 1-lane vector vectorization in BB vect but that's
a different story.
