[PATCH] enhance debug_tree() to print DECL_READ_P flag

[Martin Sebor]

The debug_tree() function doesn't print the DECL_READ_P flag
for a VAR_DECL or PARM_DECL.  The attached two like patch makes
it do so.

Martin

gcc/ChangeLog:

	* print-tree.c (print_node): Print DECL_READ_P flag.

 /* Bit masks to control dumping. Not all values are applicable to all
diff --git a/gcc/print-tree.c b/gcc/print-tree.c
index fb58be6..388c694 100644
--- a/gcc/print-tree.c
+++ b/gcc/print-tree.c
@@ -400,6 +400,8 @@ print_node (FILE *file, const char *prefix, tree node, int indent,
 	fputs (" in-constant-pool", file);
       if (code == VAR_DECL && DECL_COMMON (node))
 	fputs (" common", file);
+      if ((code == VAR_DECL || code == PARM_DECL) && DECL_READ_P (node))
+	fputs (" read", file);
       if (code == VAR_DECL && DECL_THREAD_LOCAL_P (node))
 	{
 	  fputs (" ", file);