arc: Fix up arc_setup_incoming_varargs [PR114175]

Like for x86-64, alpha or rs6000, arc seems to be affected too.

2024-03-19  Jakub Jelinek  <jakub@redhat.com>

	PR target/114175
	* config/arc/arc.cc (arc_setup_incoming_varargs): Only skip
	arc_function_arg_advance for TYPE_NO_NAMED_ARGS_STDARG_P functions
	if arg.type is NULL.

(cherry picked from commit 1f257714674cd8fd69db7367aecdd09b672d1db7)

diff --git a/gcc/config/arc/arc.cc b/gcc/config/arc/arc.cc
index 22eb2e9cb459fa4decb0fb47e0b184cb65cf7897..50d89c24b5feb1f81c4231298a9e666fa816aa2d 100644 (file)
--- a/gcc/config/arc/arc.cc
+++ b/gcc/config/arc/arc.cc
@@ -2450,7 +2450,8 @@ arc_setup_incoming_varargs (cumulative_args_t args_so_far,
   /* We must treat `__builtin_va_alist' as an anonymous arg.  */
 
   next_cum = *get_cumulative_args (args_so_far);
-  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl)))
+  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl))
+      || arg.type != NULL_TREE)
     arc_function_arg_advance (pack_cumulative_args (&next_cum), arg);
   first_anon_arg = next_cum;