https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69053
--- Comment #4 from alahay01 at gcc dot gnu.org --- (In reply to alalaw01 from comment #3) > Well, this fixes it, but I'm not sure it fixes it in the right place... > > diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c > index ee32166..bd66aa5 100644 > --- a/gcc/tree-vect-loop.c > +++ b/gcc/tree-vect-loop.c > @@ -4178,7 +4178,9 @@ get_initial_def_for_reduction (gimple *stmt, tree > init_val > break; > } > } > - init_def = build_vector_from_val (vectype, init_value); > + init_def = build_vector_from_val (vectype, > + fold_convert (TREE_TYPE (vectype), > + init_value)); > break; > > default: I don’t think we can move the conversion any earlier, it needs to be somewhere in get_initial_def_for_reduction. Possibly you could move the fold_convert on init_val earlier in the function just before the switch statement, but that has the potential to break more things. So I’d probably leave it where it is. Also, the fold_convert should just vanish if there is nothing to do, so that shouldn't be an issue for existing vectorisations.
