gdbhooks.py (TreePrinter.to_string): Recognize ggc_free'd memory.

	* gdbhooks.py (TreePrinter.to_string): Recognize ggc_free'd memory.

	* tree.c (get_tree_code_name): Likewise.
	* print-tree.c (print_node): Only briefly print a node with an
	invalid code.

From-SVN: r272150

1 files changed, 9 insertions, 7 deletions

diff --git a/gcc/print-tree.c b/gcc/print-tree.c
index 81b66a1..f69a2c2 100644
--- a/gcc/print-tree.c
+++ b/gcc/print-tree.c
@@ -233,6 +233,15 @@ print_node (FILE *file, const char *prefix, tree node, int indent,
     return;
 
   code = TREE_CODE (node);
+
+  /* It is unsafe to look at any other fields of a node with ERROR_MARK or
+     invalid code.  */
+  if (code == ERROR_MARK || code >= MAX_TREE_CODES)
+    {
+      print_node_brief (file, prefix, node, indent);
+      return;
+    }
+
   tclass = TREE_CODE_CLASS (code);
 
   /* Don't get too deep in nesting.  If the user wants to see deeper,
@@ -251,13 +260,6 @@ print_node (FILE *file, const char *prefix, tree node, int indent,
       return;
     }
 
-  /* It is unsafe to look at any other fields of an ERROR_MARK node.  */
-  if (code == ERROR_MARK)
-    {
-      print_node_brief (file, prefix, node, indent);
-      return;
-    }
-
   /* Allow this function to be called if the table is not there.  */
   if (table)
     {