re PR target/54220 ([avr] Potential stack corruption in naked functions at -O0)

	PR target/54220
	* config/avr/avr.c (TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS): New
	define to...
	(avr_allocate_stack_slots_for_args): ...this new static function.

From-SVN: r190914

gcc/ChangeLog

+2012-09-04  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	PR target/54220
+	* config/avr/avr.c (TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS): New
+	define to...
+	(avr_allocate_stack_slots_for_args): ...this new static function.
+
 2012-09-04  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* config/arm/arm.c (arm_expand_builtin): Replace gen_rtx_CONST_INT

gcc/config/avr/avr.c

@@ -700,6 +700,16 @@ avr_regs_to_save (HARD_REG_SET *set)
   return count;
 }
 
+
+/* Implement `TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS' */
+
+static bool
+avr_allocate_stack_slots_for_args (void)
+{
+  return !cfun->machine->is_naked;
+}
+
+
 /* Return true if register FROM can be eliminated via register TO.  */
 
 static bool
@@ -11339,6 +11349,9 @@ avr_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *arg,
 #undef  TARGET_CAN_ELIMINATE
 #define TARGET_CAN_ELIMINATE avr_can_eliminate
 
+#undef  TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS
+#define TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS avr_allocate_stack_slots_for_args
+
 #undef TARGET_WARN_FUNC_RETURN
 #define TARGET_WARN_FUNC_RETURN avr_warn_func_return