--- gcc/cfgexpand.c.jj	2010-07-20 12:12:14.000000000 +0200
+++ gcc/cfgexpand.c	2010-07-20 18:06:13.000000000 +0200
@@ -2369,7 +2369,10 @@ expand_debug_expr (tree exp)
 	     below would ICE.  While it is likely a FE bug,
 	     try to be robust here.  See PR43166.  */
 	  || mode == BLKmode
-	  || (mode == VOIDmode && GET_MODE (op0) != VOIDmode))
+	  || (mode == VOIDmode && GET_MODE (op0) != VOIDmode)
+	  /* On some targets DECL_MODE of a FUNCTION_DECL is
+	     different from TYPE_MODE of its type.  */
+	  || (TREE_CODE (exp) == FUNCTION_DECL && MEM_P (op0)))
 	{
 	  gcc_assert (MEM_P (op0));
 	  op0 = adjust_address_nv (op0, mode, 0);
@@ -2427,7 +2430,9 @@ expand_debug_expr (tree exp)
 	  op0 = simplify_gen_subreg (mode, op0, inner_mode,
 				     subreg_lowpart_offset (mode,
 							    inner_mode));
-	else if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))))
+	else if (TREE_CODE_CLASS (TREE_CODE (exp)) == tcc_unary
+		 ? TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))
+		 : unsignedp)
 	  op0 = gen_rtx_ZERO_EXTEND (mode, op0);
 	else
 	  op0 = gen_rtx_SIGN_EXTEND (mode, op0);