[Bug middle-end/67133] [6 Regression] ICE at -Os and above on x86_64-linux-gnu in gimple_op, at gimple.h:2274

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67133

--- Comment #19 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'm testing

--- a/gcc/gimple.c
+++ b/gcc/gimple.c
@@ -2949,6 +2949,8 @@ maybe_remove_unused_call_args (struct function *fn,
gimple stmt)
       && TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))) == void_type_node
       && gimple_call_num_args (stmt))
     {
+      tree fntype = gimple_call_fntype (stmt);
+      TYPE_ATTRIBUTES (fntype) = DECL_ATTRIBUTES (decl);
       gimple_set_num_ops (stmt, 3);
       update_stmt_fn (fn, stmt);
     }

instead