predict.c (tree_estimate_probability_driver): Normalize the loop when…

predict.c (tree_estimate_probability_driver): Normalize the loop when initializing the loop optimizer.

2012-07-31  Dehao Chen  <dehao@google.com>

	* predict.c (tree_estimate_probability_driver): Normalize the
	loop when initializing the loop optimizer.

From-SVN: r190015

gcc/ChangeLog

+2012-07-31  Dehao Chen  <dehao@google.com>
+
+	* predict.c (tree_estimate_probability_driver): Normalize the
+	loop when initializing the loop optimizer.
+
 2012-07-31  Richard Guenther  <rguenther@suse.de>
 
 	* tree-flow.h (struct var_ann_d): Remove need_phi_state

gcc/predict.c

@@ -2200,7 +2200,7 @@ tree_estimate_probability_driver (void)
 {
   unsigned nb_loops;
 
-  loop_optimizer_init (0);
+  loop_optimizer_init (LOOPS_NORMAL);
   if (dump_file && (dump_flags & TDF_DETAILS))
     flow_loops_dump (dump_file, NULL, 0);
 

gcc/testsuite/ChangeLog

+2012-07-31  Dehao Chen  <dehao@google.com>
+
+	* gcc.dg/predict-7.c: New test.
+
 2012-07-31  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/54134

gcc/testsuite/gcc.dg/predict-7.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-profile_estimate" } */
+
+extern int global;
+
+int bar (int);
+
+void foo (int base)
+{
+  int i;
+  while (global < 10)
+    for (i = base; i < 10; i++)
+      bar (i);
+}
+
+/* { dg-final { scan-tree-dump-times "loop branch heuristics" 0 "profile_estimate"} } */
+/* { dg-final { cleanup-tree-dump "profile_estimate" } } */