From: Keith Packard <keithp@keithp.com>
Date: Thu, 16 Jan 2025 05:05:46 +0000 (-0700)
Subject: lm32: Skip last named param when computing save varargs regs
X-Git-Tag: basepoints/gcc-16~2617
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6e593fcda49b1001e87e94ab709607b4fb2c66cf;p=thirdparty%2Fgcc.git

lm32: Skip last named param when computing save varargs regs

The cumulative args value in setup_incoming_varargs points at
the last named parameter. We need to skip over that (if present) to
get to the first anonymous argument as we only want to include
those anonymous args in the saved register block.

gcc/
	* config/lm32/lm32.cc (lm32_setup_incoming_varargs): Skip last
	named parameter when preparing to flush registers with unnamed
	arguments to th stack.
---

diff --git a/gcc/config/lm32/lm32.cc b/gcc/config/lm32/lm32.cc
index d78efc59da5..dfec28608a0 100644
--- a/gcc/config/lm32/lm32.cc
+++ b/gcc/config/lm32/lm32.cc
@@ -679,14 +679,18 @@ lm32_setup_incoming_varargs (cumulative_args_t cum_v,
 			     const function_arg_info &arg,
 			     int *pretend_size, int no_rtl)
 {
-  CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
+  CUMULATIVE_ARGS next_cum = *get_cumulative_args (cum_v);
   int first_anon_arg;
   tree fntype;
 
   fntype = TREE_TYPE (current_function_decl);
 
+  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl))
+      || arg.type != NULL_TREE)
+    lm32_function_arg_advance (pack_cumulative_args (&next_cum), arg);
+
   if (stdarg_p (fntype))
-    first_anon_arg = *cum + LM32_FIRST_ARG_REG;
+    first_anon_arg = next_cum + LM32_FIRST_ARG_REG;
   else
     {
       /* this is the common case, we have been passed details setup
@@ -697,7 +701,7 @@ lm32_setup_incoming_varargs (cumulative_args_t cum_v,
       int size = arg.promoted_size_in_bytes ();
 
       first_anon_arg =
-	*cum + LM32_FIRST_ARG_REG +
+	next_cum + LM32_FIRST_ARG_REG +
 	((size + UNITS_PER_WORD - 1) / UNITS_PER_WORD);
     }