csky: Fix up csky_setup_incoming_varargs [PR114175]

Like for x86-64, alpha or rs6000, csky 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/csky/csky.cc (csky_setup_incoming_varargs): Only skip
	csky_function_arg_advance for TYPE_NO_NAMED_ARGS_STDARG_P functions
	if arg.type is NULL.

diff --git a/gcc/config/csky/csky.cc b/gcc/config/csky/csky.cc
index e33ca8cf43463dffd80e363f94632019df2ad8bf..72619ea30312de738f47e48606946fb5ad174abd 100644 (file)
--- a/gcc/config/csky/csky.cc
+++ b/gcc/config/csky/csky.cc
@@ -2090,7 +2090,8 @@ csky_setup_incoming_varargs (cumulative_args_t pcum_v,
 
   cfun->machine->uses_anonymous_args = 1;
   local_cum = *pcum;
-  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)
     csky_function_arg_advance (local_cum_v, arg);
   regs_to_push = CSKY_NPARM_REGS - local_cum.reg;
   if (regs_to_push)