diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 403c825fc8d6..3525466c3d9b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2010-10-08  Alexandre Oliva  <aoliva@redhat.com>
+
+	PR debug/45673
+	PR debug/45604
+	PR debug/45419
+	PR debug/45408
+	* tree-pretty-print.c (dump_generic_node): Explicitly dump the
+	type of MEM_REFs to INTEGER_CSTs.
+
 2010-10-07  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* config/m68hc11/m68hc11.c (m68hc11_print_operand): Call
diff --git a/gcc/tree-pretty-print.c b/gcc/tree-pretty-print.c
index 6440f8097eb5..8ec2dedbb1e5 100644
--- a/gcc/tree-pretty-print.c
+++ b/gcc/tree-pretty-print.c
@@ -801,6 +801,10 @@ dump_generic_node (pretty_printer *buffer, tree node, int spc, int flags,
     case MEM_REF:
       {
 	if (integer_zerop (TREE_OPERAND (node, 1))
+	    /* Dump the types of INTEGER_CSTs explicitly, for we can't
+	       infer them and MEM_ATTR caching will share MEM_REFs
+	       with differently-typed op0s.  */
+	    && TREE_CODE (TREE_OPERAND (node, 0)) != INTEGER_CST
 	    /* Same pointer types, but ignoring POINTER_TYPE vs.
 	       REFERENCE_TYPE.  */
 	    && (TREE_TYPE (TREE_TYPE (TREE_OPERAND (node, 0)))
@@ -1163,6 +1167,10 @@ dump_generic_node (pretty_printer *buffer, tree node, int spc, int flags,
 	      || (TREE_CODE (op0) == MEM_REF
 		  && TREE_CODE (TREE_OPERAND (op0, 0)) != ADDR_EXPR
 		  && integer_zerop (TREE_OPERAND (op0, 1))
+		  /* Dump the types of INTEGER_CSTs explicitly, for we
+		     can't infer them and MEM_ATTR caching will share
+		     MEM_REFs with differently-typed op0s.  */
+		  && TREE_CODE (TREE_OPERAND (op0, 0)) != INTEGER_CST
 		  /* Same pointer types, but ignoring POINTER_TYPE vs.
 		     REFERENCE_TYPE.  */
 		  && (TREE_TYPE (TREE_TYPE (TREE_OPERAND (op0, 0)))