https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101705
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |53947
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
SLP vectorization handles this and it even splits the groups and would use
smaller groups for the tail but then it fails:
t.i:244:10: note: === vect_slp_analyze_instance_alignment ===
t.i:244:10: missed: desired vector type conflicts with earlier one for _113 =
s_129(D)->b113;
t.i:244:10: note: removing SLP instance operations starting from:
d_130(D)->b113 = _113;
t.i:252:10: note: === vect_slp_analyze_instance_alignment ===
t.i:252:10: missed: desired vector type conflicts with earlier one for _121 =
s_129(D)->b121;
t.i:252:10: note: removing SLP instance operations starting from:
d_130(D)->b121 = _121;
t.i:256:10: note: === vect_slp_analyze_instance_alignment ===
t.i:256:10: missed: desired vector type conflicts with earlier one for _125 =
s_129(D)->b125;
t.i:256:10: note: removing SLP instance operations starting from:
d_130(D)->b125 = _125;
which is a pre-existing issue (and I think there's a duplicate for the
vectorizer issue). Not sure what part Andrew wants to look at. Without
vectorization we don't merge anything.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
