tree.h (struct tree_type): Don't use descbits in GTY annotation.

	* tree.h (struct tree_type): Don't use descbits in GTY
	annotation.
	* gengtype.c (walk_type): Don't recognize descbits option.

From-SVN: r166365

gcc/ChangeLog

+2010-11-05  Ian Lance Taylor  <iant@google.com>
+
+	* tree.h (struct tree_type): Don't use descbits in GTY
+	annotation.
+	* gengtype.c (walk_type): Don't recognize descbits option.
+
 2010-11-05  Joseph Myers  <joseph@codesourcery.com>
 
 	* defaults.h (DEFAULT_WORD_SWITCH_TAKES_ARG,

gcc/gengtype.c

@@ -2164,8 +2164,6 @@ walk_type (type_p t, struct walk_type_data *d)
       ;
     else if (strcmp (oo->name, "default") == 0)
       ;
-    else if (strcmp (oo->name, "descbits") == 0)
-      ;
     else if (strcmp (oo->name, "param_is") == 0)
       ;
     else if (strncmp (oo->name, "param", 5) == 0

gcc/tree.h

@@ -2336,8 +2336,7 @@ struct GTY(()) tree_type {
     int GTY ((tag ("0"))) address;
     const char * GTY ((tag ("1"))) pointer;
     struct die_struct * GTY ((tag ("2"))) die;
-  } GTY ((desc ("debug_hooks == &sdb_debug_hooks ? 1 : debug_hooks == &dwarf2_debug_hooks ? 2 : 0"),
-	  descbits ("2"))) symtab;
+  } GTY ((desc ("debug_hooks == &sdb_debug_hooks ? 1 : debug_hooks == &dwarf2_debug_hooks ? 2 : 0"))) symtab;
   tree name;
   tree minval;
   tree maxval;