bfin.c (struct loop_info): New members block_bitmap and bad.

	* config/bfin/bfin.c (struct loop_info): New members block_bitmap and
	bad.
	(struct loop_work and related VEC declarations): Delete.
	(bfin_dump_loops): Print out new member bad.
	(bfin_bb_in_loop): Use plain bitmap test.  Don't recurse.
	(bfin_scan_loop): Don't recurse.
	(bfin_optimize_loop): Don't use a loop depth of -1 to indicate bad
	loops.  No longer need to update outer loops if the current one is
	found bad.  Move some validitiy checks to bfin_discover_loop.
	(bfin_discover_loop): New function, mostly split from bfin_reorg_loops,
	but changed not to check for nesting.  Also changed to use the new bad
	flag.
	(bfin_reorg_loops): Use bfin_discover_loop to find single loops one at a
	time.  Use bitmap based test to discover loop nesting.

From-SVN: r116972

gcc/ChangeLog

@@ -11,6 +11,21 @@
 
 	* cfgrtl.c (emit_insn_at_entry): Use gcc_assert, not abort.
 
+	* config/bfin/bfin.c (struct loop_info): New members block_bitmap and
+	bad.
+	(struct loop_work and related VEC declarations): Delete.
+	(bfin_dump_loops): Print out new member bad.
+	(bfin_bb_in_loop): Use plain bitmap test.  Don't recurse.
+	(bfin_scan_loop): Don't recurse.
+	(bfin_optimize_loop): Don't use a loop depth of -1 to indicate bad
+	loops.  No longer need to update outer loops if the current one is
+	found bad.  Move some validitiy checks to bfin_discover_loop.
+	(bfin_discover_loop): New function, mostly split from bfin_reorg_loops,
+	but changed not to check for nesting.  Also changed to use the new bad
+	flag.
+	(bfin_reorg_loops): Use bfin_discover_loop to find single loops one at a
+	time.  Use bitmap based test to discover loop nesting.
+
 2006-09-15  Kazu Hirata  <kazu@codesourcery.com>
 
 	* doc/tm.texi (TARGET_FUNCTION_VALUE): Put @deftypefn all in