https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125776
--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Drea Pinski from comment #4)
> (In reply to Drea Pinski from comment #3)
> > It could be the use of FOR_EACH_IMM_USE_FAST. I have to check if thst could
> > have a debug stmt or not. If so then I need to skip it.
>
> Yes this patch fixes it:
> ```
> diff --git a/gcc/tree-ssa-phiopt.cc b/gcc/tree-ssa-phiopt.cc
> index 9c253883f07..ce34e40c1f3 100644
> --- a/gcc/tree-ssa-phiopt.cc
> +++ b/gcc/tree-ssa-phiopt.cc
> @@ -305,6 +305,8 @@ is_factor_profitable (gimple *def_stmt, basic_block
> merge, const gimple_match_op
> FOR_EACH_IMM_USE_FAST (use_p, iter, arg)
> {
> gimple *use_stmt = USE_STMT (use_p);
> + if (is_gimple_debug (use_stmt))
> + continue;
> basic_block use_bb = gimple_bb (use_stmt);
> if (dominated_by_p (CDI_DOMINATORS, merge, use_bb))
> {
>
> ```
makes sense.
> Will push later today.
thanks
