* predict.c (predict_loops): Kill RTL variant.

From-SVN: r118694

gcc/ChangeLog

 2006-11-11  Jan Hubicka  <jh@suse.cz>
 
+	* predict.c (predict_loops): Kill RTL variant.
+
+2006-11-11  Jan Hubicka  <jh@suse.cz>
+
 	* tree-pass.h (pass_purge_lineno_notes): Remove declaration.
 	* modulo-sched.c (find_line_note): Remove.
 	(loop_canon_p): Do not worry about line number notes.
@@ -98,7 +102,7 @@
 	* local-alloc.c (update_equiv_regs): Copy the memory RTX to be used
 	in REG_EQUIV notes.
 	* gcse.c (try_replace_reg): Copy the replacement.
-	* i386.c (emit_i387_cw_initialization): Copy stored_mode
+	* i386.c (emit_i387_cw_initialization): Copy stored_mode.
 	(assign_386_stack_local): Always return copied memory expression
 	* function.c (instantiate_virtual_regs_in_insn): Copy the operand
 	duplicates.

gcc/predict.c

@@ -631,11 +631,10 @@ combine_predictions_for_bb (basic_block bb)
    When RTLSIMPLELOOPS is set, attempt to count number of iterations by analyzing
    RTL otherwise use tree based approach.  */
 static void
-predict_loops (struct loops *loops_info, bool rtlsimpleloops)
+predict_loops (struct loops *loops_info)
 {
   unsigned i;
 
-  if (!rtlsimpleloops)
   scev_initialize (loops_info);
 
   /* Try to predict out blocks in a loop that are not part of a
@@ -646,40 +645,11 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops)
       unsigned j;
       unsigned n_exits;
       struct loop *loop = loops_info->parray[i];
-      struct niter_desc desc;
-      unsigned HOST_WIDE_INT niter;
       edge *exits;
+      struct tree_niter_desc niter_desc;
 
       exits = get_loop_exit_edges (loop, &n_exits);
 
-      if (rtlsimpleloops)
-	{
-	  iv_analysis_loop_init (loop);
-	  find_simple_exit (loop, &desc);
-
-	  if (desc.simple_p && desc.const_iter)
-	    {
-	      int prob;
-	      niter = desc.niter + 1;
-	      if (niter == 0)        /* We might overflow here.  */
-		niter = desc.niter;
-	      if (niter
-		  > (unsigned int) PARAM_VALUE (PARAM_MAX_PREDICTED_ITERATIONS))
-		niter = PARAM_VALUE (PARAM_MAX_PREDICTED_ITERATIONS);
-
-	      prob = (REG_BR_PROB_BASE
-		      - (REG_BR_PROB_BASE + niter /2) / niter);
-	      /* Branch prediction algorithm gives 0 frequency for everything
-		 after the end of loop for loop having 0 probability to finish.  */
-	      if (prob == REG_BR_PROB_BASE)
-		prob = REG_BR_PROB_BASE - 1;
-	      predict_edge (desc.in_edge, PRED_LOOP_ITERATIONS,
-			    prob);
-	    }
-	}
-      else
-	{
-	  struct tree_niter_desc niter_desc;
 
       for (j = 0; j < n_exits; j++)
 	{
@@ -708,8 +678,6 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops)
 	      predict_edge (exits[j], PRED_LOOP_ITERATIONS, probability);
 	    }
 	}
-
-	}
       free (exits);
 
       bbs = get_loop_body (loop);
@@ -726,8 +694,7 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops)
 	     statements construct loops via "non-loop" constructs
 	     in the source language and are better to be handled
 	     separately.  */
-	  if ((rtlsimpleloops && !can_predict_insn_p (BB_END (bb)))
-	      || predicted_by_p (bb, PRED_CONTINUE))
+	  if (predicted_by_p (bb, PRED_CONTINUE))
 	    continue;
 
 	  /* Loop branch heuristics - predict an edge back to a
@@ -776,11 +743,8 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops)
       free (bbs);
     }
 
-  if (!rtlsimpleloops)
-    {
   scev_finalize ();
   current_loops = NULL;
-    }
 }
 
 /* Attempt to predict probabilities of BB outgoing edges using local
@@ -1303,7 +1267,7 @@ tree_estimate_probability (void)
   tree_bb_level_predictions ();
 
   mark_irreducible_loops (&loops_info);
-  predict_loops (&loops_info, false);
+  predict_loops (&loops_info);
 
   FOR_EACH_BB (bb)
     {