[gcc r13-8515] ft32: Fix up ft32_setup_incoming_varargs [PR114175]

[Jakub Jelinek via Gcc-cvs]

https://gcc.gnu.org/g:a2565fbb722f9ea9a990286b72ae1a95145af910

commit r13-8515-ga2565fbb722f9ea9a990286b72ae1a95145af910
Author: Jakub Jelinek <ja...@redhat.com>
Date:   Wed Mar 20 16:59:32 2024 +0100

    ft32: Fix up ft32_setup_incoming_varargs [PR114175]
    
    Like for x86-64, alpha or rs6000, ft32 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  <ja...@redhat.com>
    
            PR target/114175
            * config/ft32/ft32.cc (ft32_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 22612a8b5e0853c530f98fc7c0d6f6812b36518d)

Diff:
---
 gcc/config/ft32/ft32.cc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/gcc/config/ft32/ft32.cc b/gcc/config/ft32/ft32.cc
index 806ab769f79..ba92460f7be 100644
--- a/gcc/config/ft32/ft32.cc
+++ b/gcc/config/ft32/ft32.cc
@@ -635,9 +635,10 @@ ft32_setup_incoming_varargs (cumulative_args_t cum_v,
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   int named_size = 0;
-  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl)))
-    named_size =
-      GET_MODE_SIZE (SImode) * (*cum - FT32_R0) + GET_MODE_SIZE (arg.mode);
+  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl))
+      || arg.type != NULL_TREE)
+    named_size
+      = GET_MODE_SIZE (SImode) * (*cum - FT32_R0) + GET_MODE_SIZE (arg.mode);
 
   if (named_size < 24)
     *pretend_size = 24 - named_size;