bitmap.c (bitmap_find_bit): Return early if we have the correct element cached.

* bitmap.c (bitmap_find_bit): Return early if we have the correct
element cached.

From-SVN: r53686

gcc/ChangeLog

+2002-05-21  Richard Earnshaw  <rearnsha@arm.com>
+
+	* bitmap.c (bitmap_find_bit): Return early if we have the correct
+	element cached.
+
 Tue May 21 10:51:54 CEST 2002  Jan Hubicka  <jh@suse.cz>
 
 	* profile.c (gen_edge_profiler):  Set alias set before the memory is

gcc/bitmap.c

@@ -300,8 +300,9 @@ bitmap_find_bit (head, bit)
   bitmap_element *element;
   unsigned HOST_WIDE_INT indx = bit / BITMAP_ELEMENT_ALL_BITS;
 
-  if (head->current == 0)
-    return 0;
+  if (head->current == 0
+      || head->indx == indx)
+    return head->current;
 
   if (head->indx > indx)
     for (element = head->current;