From 6e593fcda49b1001e87e94ab709607b4fb2c66cf Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Wed, 15 Jan 2025 22:05:46 -0700
Subject: [PATCH] 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.
---
gcc/config/lm32/lm32.cc | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/gcc/config/lm32/lm32.cc b/gcc/config/lm32/lm32.cc
index d78efc59da5f..dfec28608a0a 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);
}
--
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