From: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
Date: Thu, 7 Aug 2014 11:16:16 +0000 (+0000)
Subject: Fix INSN_TICK heuristic for SCHED_PRESSURE
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=88366b18d690e8cd41dd4c47e96c5595ffcad8a2;p=gcc.git

Fix INSN_TICK heuristic for SCHED_PRESSURE

	* haifa-sched.c (rank_for_schedule): Fix INSN_TICK-based heuristics.

From-SVN: r213708
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f5e63955f31..b6f03630890 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2014-08-07  Maxim Kuvyrkov  <maxim.kuvyrkov@linaro.org>
+
+	* haifa-sched.c (rank_for_schedule): Fix INSN_TICK-based heuristics.
+
 2014-08-07  Ilya Tocar  <ilya.tocar@intel.com>
 
 	* config/i386/sse.md (vec_extract_lo_<mode><mask_name>): Fix
diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index fb15e0db882..a33186d45cb 100644
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -2584,14 +2584,11 @@ rank_for_schedule (const void *x, const void *y)
     }
 
   if (sched_pressure != SCHED_PRESSURE_NONE
-      && (INSN_TICK (tmp2) > clock_var || INSN_TICK (tmp) > clock_var))
+      && (INSN_TICK (tmp2) > clock_var || INSN_TICK (tmp) > clock_var)
+      && INSN_TICK (tmp2) != INSN_TICK (tmp))
     {
-      if (INSN_TICK (tmp) <= clock_var)
-	return -1;
-      else if (INSN_TICK (tmp2) <= clock_var)
-	return 1;
-      else
-	return INSN_TICK (tmp) - INSN_TICK (tmp2);
+      diff = INSN_TICK (tmp) - INSN_TICK (tmp2);
+      return diff;
     }
 
   /* If we are doing backtracking in this schedule, prefer insns that
@@ -2676,10 +2673,9 @@ rank_for_schedule (const void *x, const void *y)
     }
 
   /* Prefer instructions that occur earlier in the model schedule.  */
-  if (sched_pressure == SCHED_PRESSURE_MODEL)
+  if (sched_pressure == SCHED_PRESSURE_MODEL
+      && INSN_BB (tmp) == target_bb && INSN_BB (tmp2) == target_bb)
     {
-      int diff;
-
       diff = model_index (tmp) - model_index (tmp2);
       if (diff != 0)
 	return diff;