https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92305
--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe this is a FE bug, for these functions TYPE_ARG_TYPES of the
FUNCTION_TYPE show just 6 arguments and don't include those 4 extra boolean
args for the scalar optional dummy vars, and as the function isn't varargs
either, it just confuses the calls.c completely, because it has more arguments
than really allowed.
--- gcc/fortran/trans-types.c.jj 2020-01-12 11:54:36.000000000 +0100
+++ gcc/fortran/trans-types.c 2020-01-31 21:26:34.199188677 +0100
@@ -3098,6 +3098,16 @@ gfc_get_function_type (gfc_symbol * sym,
vec_safe_push (typelist, type);
}
+ /* For noncharacter scalar intrinsic types, VALUE passes the value,
+ hence, the optional status cannot be transferred via a NULL pointer.
+ Thus, we will use a hidden argument in that case. */
+ else if (arg
+ && arg->attr.optional
+ && arg->attr.value
+ && !arg->attr.dimension
+ && arg->ts.type != BT_CLASS
+ && !gfc_bt_struct (arg->ts.type))
+ vec_safe_push (typelist, boolean_type_node);
}
if (!vec_safe_is_empty (typelist)
--- gcc/fortran/trans-decl.c.jj 2020-01-30 09:34:43.207088430 +0100
+++ gcc/fortran/trans-decl.c 2020-01-31 21:28:49.272197084 +0100
@@ -2645,8 +2645,8 @@ create_function_arglist (gfc_symbol * sy
|| f->sym->ts.u.cl->backend_decl == length)
{
if (POINTER_TYPE_P (len_type))
- f->sym->ts.u.cl->backend_decl =
- build_fold_indirect_ref_loc (input_location, length);
+ f->sym->ts.u.cl->backend_decl
+ = build_fold_indirect_ref_loc (input_location, length);
else if (f->sym->ts.u.cl->backend_decl == NULL)
gfc_create_string_length (f->sym);
@@ -2677,6 +2677,8 @@ create_function_arglist (gfc_symbol * sy
DECL_ARG_TYPE (tmp) = boolean_type_node;
TREE_READONLY (tmp) = 1;
gfc_finish_decl (tmp);
+
+ hidden_typelist = TREE_CHAIN (hidden_typelist);
}
/* For non-constant length array arguments, make sure they use
seems to fix this, will see how far I get with that.
