predict.c (predict_loops): Remove PRED_LOOP_BRANCH.

	* predict.c (predict_loops): Remove PRED_LOOP_BRANCH.
	* predict.def (PRED_LOOP_BRANCH): Remove.

From-SVN: r237311

gcc/ChangeLog

+2016-06-10  Jan Hubicka  <hubicka@ucw.cz>
+
+	* predict.c (predict_loops): Remove PRED_LOOP_BRANCH.
+	* predict.def (PRED_LOOP_BRANCH): Remove.
+
 2016-06-10  David Malcolm  <dmalcolm@redhat.com>
 
 	* Makefile.in (OBJS): Add ggc-tests.o.

gcc/predict.c

@@ -1805,18 +1805,6 @@ predict_loops (void)
 	  if (predicted_by_p (bb, PRED_CONTINUE))
 	    continue;
 
-	  /* Loop branch heuristics - predict an edge back to a
-	     loop's head as taken.  */
-	  if (bb == loop->latch)
-	    {
-	      e = find_edge (loop->latch, loop->header);
-	      if (e)
-		{
-		  header_found = 1;
-		  predict_edge_def (e, PRED_LOOP_BRANCH, TAKEN);
-		}
-	    }
-
 	  /* Loop exit heuristics - predict an edge exiting the loop if the
 	     conditional has no loop header successors as not taken.  */
 	  if (!header_found

gcc/predict.def

@@ -88,12 +88,6 @@ DEF_PREDICTOR (PRED_NORETURN, "noreturn call", PROB_VERY_LIKELY,
 DEF_PREDICTOR (PRED_COLD_FUNCTION, "cold function call", PROB_VERY_LIKELY,
 	       PRED_FLAG_FIRST_MATCH)
 
-/* Loopback edge is taken.
-   FIXME: This is currently disabled because loop_optimizer_init force
-   loops to have simple latches.  */
-DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (86),
-	       PRED_FLAG_FIRST_MATCH)
-
 /* Edge causing loop to terminate is probably not taken.  */
 DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (92),
 	       PRED_FLAG_FIRST_MATCH)