* flow.c (flow_nodes_print, flow_loops_cfg_dump): New functions.

	(flow_loop_nested_p, flow_loops_dump, flow_loops_free): Likewise.
	(flow_loop_exits_find, flow_loop_nodes_find): Likewise.
	(flow_depth_first_order_compute, flow_loop_pre_header_find): Likewise.
	(flow_loop_tree_node_add, flow_loops_tree_build): Likewise.
	(flow_loop_level_compute, low_loops_level_compute): Likewise.
	(flow_loops_find, flow_loop_outside_edge_p): Likewise.
	* basic-block.h: Protect from multiple inclusion.
	(flow_loops_find, flow_loops_free, flow_loop_dump): Add protoypes.
	(struct loops, struct loop): Define structures.
	* sbitmap.c (sbitmap_a_subset_b_p): New function.
	* sbitmap.h: Protect from multiple inclusion.
	(sbitmap_a_subset_b_p): Add prototype.
	* Makefile.in (LOOP_H): New macro.
	(stmt.o, integrate.o, loop.o, unroll.o): Replace loop.h with LOOP_H.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30720 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 19 insertions, 0 deletions

diff --git a/gcc/sbitmap.c b/gcc/sbitmap.c
index 4cc7c85f5c1..dece5e5ef25 100644
--- a/gcc/sbitmap.c
+++ b/gcc/sbitmap.c
@@ -265,6 +265,25 @@ sbitmap_a_or_b (dst, a, b)
     }
   return changed;
 }
+/* Return non-zero if A is a subset of B.  */
+
+int
+sbitmap_a_subset_b_p (a, b)
+     sbitmap a, b;
+{
+  int i;
+  sbitmap_ptr ap, bp;
+
+  ap = a->elms;
+  bp = b->elms;
+  for (i = 0; i < a->size; i++)
+    {
+      if ((*ap | *bp) != *bp)
+	return 0;
+      ap++; bp++;
+    }
+  return 1;
+}
 
 /* Set DST to be (A or (B and C)).
    Return non-zero if any change is made.  */