http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45685
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Component|rtl-optimization |tree-optimization
AssignedTo|ebotcazou at gcc dot |unassigned at gcc dot
|gnu.org |gnu.org
--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-11-24
18:31:18 UTC ---
Clearly ifcvt.c is overwhelmed here and somewhat shoots itself in the foot.
The noce_emit_store_flag transformation in pass n creates insns that block the
cond_move_process_if_block conversion in pass n+1 because the new insns are
(rightfully) deemed unsuitable. Quite tricky to overcome in my opinion.
As Jakub said, creating 3 almost identical cond_expr:
prephitmp.9_39 = [cond_expr] D.2693_11 <= 0 ? -1 : 1;
prephitmp.10_40 = [cond_expr] D.2693_11 <= 0 ? 1 : -1;
prephitmp.11_41 = [cond_expr] D.2693_11 <= 0 ? 1 : -1;
for only one in the source code:
int val = (products[i] > 0) ? 1 : -1;
is simply unreasonable. Thus recategorizing.
