improfe loop dumps

we have flow_loop_dump and print_loop. While print_loop was extended to dump
stuff from loop structure we added over years (loop info), flow_loop_dump was not.
-fdump-tree-all files contains flow_loop_dump which makes it hard to see what
metadata we have attached to loop.

This patch unifies dumping of these fields from both functions.  For example for:
int a[100];
main()
{
        for (int i = 0;  i < 10; i++)
                a[i]=i;
}
we now print:
;; Loop 0
;;  header 0, latch 1
;;  depth 0, outer -1
;;  nodes: 0 1 2 3 4 5
;;
;; Loop 1
;;  header 4, latch 3
;;  depth 1, outer 0, finite_p
;;  upper_bound 10
;;  likely_upper_bound 10
;;  estimate 10
;;  iterations by profile: 10.001101 (unreliable)

finite_p, upper_boud, likely_upper_bound estimate and iterations by profile is new.

Bootstrap/regtest on x86_64 in progress. OK if it passes?

Honza

gcc/ChangeLog:

	* cfgloop.cc (flow_loop_dump): Use print_loop_info.
	* cfgloop.h (print_loop_info): Declare.
	* tree-cfg.cc (print_loop_info): Break out from ...; add
	printing of missing fields and profile
	(print_loop): ... here.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/dce-1.c: Update for new loop dumps.

1 files changed, 3 insertions, 8 deletions

diff --git a/gcc/cfgloop.cc b/gcc/cfgloop.cc
index 020e573..9ca85e6 100644
--- a/gcc/cfgloop.cc
+++ b/gcc/cfgloop.cc
@@ -135,17 +135,12 @@ flow_loop_dump (const class loop *loop, FILE *file,
       fprintf (file, "\n");
     }
 
-  fprintf (file, ";;  depth %d, outer %ld\n",
+  fprintf (file, ";;  depth %d, outer %ld",
 	   loop_depth (loop), (long) (loop_outer (loop)
 				      ? loop_outer (loop)->num : -1));
+  print_loop_info (file, loop, ";;  ");
 
-  bool reliable;
-  sreal iterations;
-  if (loop->num && expected_loop_iterations_by_profile (loop, &iterations, &reliable))
-    fprintf (file, ";;  profile-based iteration count: %f %s\n",
-	     iterations.to_double (), reliable ? "(reliable)" : "(unreliable)");
-
-  fprintf (file, ";;  nodes:");
+  fprintf (file, "\n;;  nodes:");
   bbs = get_loop_body (loop);
   for (i = 0; i < loop->num_nodes; i++)
     fprintf (file, " %d", bbs[i]->index);