for gcc/ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	PR debug/45604
	PR debug/45419
	PR debug/45408
	* tree-pretty-print.c (dump_generic_node): Disregard top-level
	types of MEM_REF pointer types to the same type.

Index: gcc/tree-pretty-print.c
===================================================================
--- gcc/tree-pretty-print.c.orig	2010-09-09 14:46:57.193300054 -0300
+++ gcc/tree-pretty-print.c	2010-09-09 23:25:34.000000000 -0300
@@ -809,8 +809,6 @@ dump_generic_node (pretty_printer *buffe
 		== TYPE_MODE (TREE_TYPE (TREE_OPERAND (node, 1))))
 	    && (TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (TREE_OPERAND (node, 0)))
 		== TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (TREE_OPERAND (node, 1))))
-	    && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (node, 0)))
-		== TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (node, 1))))
 	    /* Same value types ignoring qualifiers.  */
 	    && (TYPE_MAIN_VARIANT (TREE_TYPE (node))
 		== TYPE_MAIN_VARIANT
@@ -1173,8 +1171,6 @@ dump_generic_node (pretty_printer *buffe
 		      == TYPE_MODE (TREE_TYPE (TREE_OPERAND (op0, 1))))
 		  && (TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (TREE_OPERAND (op0, 0)))
 		      == TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (TREE_OPERAND (op0, 1))))
-		  && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (op0, 0)))
-		      == TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (op0, 1))))
 		  /* Same value types ignoring qualifiers.  */
 		  && (TYPE_MAIN_VARIANT (TREE_TYPE (op0))
 		      == TYPE_MAIN_VARIANT