m32r: Fix up m32r_setup_incoming_varargs [PR114175]

Like for x86-64, alpha or rs6000, m32r seems to be affected too.

Just visually checked differences in c23-stdarg-9.c assembly in a cross
without/with the patch, committed to trunk.

2024-03-20  Jakub Jelinek  <jakub@redhat.com>

	PR target/114175
	* config/m32r/m32r.cc (m32r_setup_incoming_varargs): Only skip
	function arg advance for TYPE_NO_NAMED_ARGS_STDARG_P functions
	if arg.type is NULL.

(cherry picked from commit 921eb457c5b105bcd84eaeac22067e9b03d5b9d1)

diff --git a/gcc/config/m32r/m32r.cc b/gcc/config/m32r/m32r.cc
index 5a788e295154de0e5929e8292bb5b43ca27106c0..f4ef594499b2bc70ffb228b14e3fcb99cf0903a7 100644 (file)
--- a/gcc/config/m32r/m32r.cc
+++ b/gcc/config/m32r/m32r.cc
@@ -1290,7 +1290,8 @@ m32r_setup_incoming_varargs (cumulative_args_t cum,
   if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl)))
     gcc_assert (arg.mode != BLKmode);
 
-  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)
     first_anon_arg = (ROUND_ADVANCE_CUM (*get_cumulative_args (cum),
                                         arg.mode, arg.type)
                      + ROUND_ADVANCE_ARG (arg.mode, arg.type));