flow.c (sbitmap_union_of_successors): New function.

        * flow.c (sbitmap_union_of_successors):  New function.
        * basic-block.h (sbitmap_union_of_successors): Declare it.
For completeness, we already had the other 3 variants.  This one
is useful for backwards lazy code motion.

From-SVN: r19232

gcc/ChangeLog

+Wed Apr 15 15:31:34 1998  Jeffrey A Law  (law@cygnus.com)
+
+	* flow.c (sbitmap_union_of_successors):  New function.
+	* basic-block.h (sbitmap_union_of_successors): Declare it.
+
 Wed Apr 15 12:38:03 1998  Jim Wilson  <wilson@cygnus.com>
 
 	* configure.in (gnu_ld): Rename to gnu_ld_flag before main loop.

gcc/basic-block.h

@@ -256,3 +256,5 @@ extern void sbitmap_intersect_of_successors PROTO ((sbitmap, sbitmap *, int,
 						    int_list_ptr *));
 extern void sbitmap_union_of_predecessors PROTO ((sbitmap, sbitmap *, int,
 						  int_list_ptr *));
+extern void sbitmap_union_of_successors PROTO ((sbitmap, sbitmap *, int,
+						int_list_ptr *));

gcc/flow.c

@@ -3862,6 +3862,19 @@ sbitmap_union_of_predecessors (dst, src, bb, s_preds)
   sbitmap_union_of_predsucc (dst, src, bb, s_preds);
 }
 
+/* Set the bitmap DST to the union of SRC of all predecessors of
+   block number BB.  */
+
+void
+sbitmap_union_of_successors (dst, src, bb, s_succ)
+     sbitmap dst;
+     sbitmap *src;
+     int bb;
+     int_list_ptr *s_succ;
+{
+  sbitmap_union_of_predsucc (dst, src, bb, s_succ);
+}
+
 /* Compute dominator relationships.  */
 void
 compute_dominators (dominators, post_dominators, s_preds, s_succs)