expr.c (expand_expr_addr_expr_1): Detect a user request for a local frame in a naked function...

* expr.c (expand_expr_addr_expr_1): Detect a user request for a
local frame in a naked function, and produce a suitable error for
that specific case.

From-SVN: r176904

gcc/ChangeLog

 2011-07-28  DJ Delorie  <dj@redhat.com>
 
+	* expr.c (expand_expr_addr_expr_1): Detect a user request for a
+	local frame in a naked function, and produce a suitable error for
+	that specific case.
+
 	* config/m32c/m32c.c (m32c_secondary_reload_class): Allow PSI
 	registers to be reloaded in HI classes when the target is HI.
 

gcc/expr.c

@@ -7088,7 +7088,16 @@ expand_expr_addr_expr_1 (tree exp, rtx target, enum machine_mode tmode,
 	  /* If the DECL isn't in memory, then the DECL wasn't properly
 	     marked TREE_ADDRESSABLE, which will be either a front-end
 	     or a tree optimizer bug.  */
-	  gcc_assert (MEM_P (result));
+
+	  if (TREE_ADDRESSABLE (exp)
+	      && ! MEM_P (result)
+	      && ! targetm.calls.allocate_stack_slots_for_args())
+	    {
+	      error ("local frame unavailable (naked function?)");
+	      return result;
+	    }
+	  else
+	    gcc_assert (MEM_P (result));
 	  result = XEXP (result, 0);
 
 	  /* ??? Is this needed anymore?  */