Dump profile-based number of iterations

	* analyze_brprob.py: Parse and display average number
	of loop iterations.
	* cfgloop.c (flow_loop_dump): Dump average number of loop iterations.
	* cfgloop.h: Change 'struct loop' to 'const struct loop' for a
	few functions.
	* cfgloopanal.c (expected_loop_iterations_unbounded): Set a new
	argument to true if the expected number of iterations is
	loop-based.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237762 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 2 deletions

diff --git a/gcc/cfgloop.c b/gcc/cfgloop.c
index 5650f0d92c5..e6174bd2191 100644
--- a/gcc/cfgloop.c
+++ b/gcc/cfgloop.c
@@ -136,6 +136,14 @@ flow_loop_dump (const struct loop *loop, FILE *file,
 	   loop_depth (loop), (long) (loop_outer (loop)
 				      ? loop_outer (loop)->num : -1));
 
+  if (loop->latch)
+    {
+      bool read_profile_p;
+      gcov_type nit = expected_loop_iterations_unbounded (loop, &read_profile_p);
+      if (read_profile_p && !loop->any_estimate)
+	fprintf (file, ";;  profile-based iteration count: %lu\n", nit);
+    }
+
   fprintf (file, ";;  nodes:");
   bbs = get_loop_body (loop);
   for (i = 0; i < loop->num_nodes; i++)
@@ -1913,7 +1921,7 @@ get_estimated_loop_iterations (struct loop *loop, widest_int *nit)
    false, otherwise returns true.  */
 
 bool
-get_max_loop_iterations (struct loop *loop, widest_int *nit)
+get_max_loop_iterations (const struct loop *loop, widest_int *nit)
 {
   if (!loop->any_upper_bound)
     return false;
@@ -1927,7 +1935,7 @@ get_max_loop_iterations (struct loop *loop, widest_int *nit)
    on the number of iterations of LOOP could not be derived, returns -1.  */
 
 HOST_WIDE_INT
-get_max_loop_iterations_int (struct loop *loop)
+get_max_loop_iterations_int (const struct loop *loop)
 {
   widest_int nit;
   HOST_WIDE_INT hwi_nit;