From: Steven Bosscher <steven@gcc.gnu.org>
Date: Sun, 10 Jan 2010 23:31:30 +0000 (+0000)
Subject: re PR rtl-optimization/42621 (Computed gotos on AMD 800% slower)
X-Git-Tag: upstream/12.2.0~95162
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c21f33b6cba88a7a5369829e72631f221b7f8cc8;p=platform%2Fupstream%2Fgcc.git

re PR rtl-optimization/42621 (Computed gotos on AMD 800% slower)

	PR rtl-optimization/42621
	* bb-reorder.c (gate_duplicated_computed_gotos): Only run if not
	optimizing for size.
	(duplicate_computed_gotos): Remove now-redundant check.

From-SVN: r155796
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 708befd..9761902 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2010-01-10  Steven Bosscher  <steven@gcc.gnu.org>
+
+	PR rtl-optimization/42621
+	* bb-reorder.c (gate_duplicated_computed_gotos): Only run if not
+	optimizing for size.
+	(duplicate_computed_gotos): Remove now-redundant check.
+
 2010-01-10  Steve Ellcey  <sje@cup.hp.com>
 
 	PR target/37454
diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index 561d7d0..ebbd517 100644
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -1981,7 +1981,9 @@ gate_duplicate_computed_gotos (void)
 {
   if (targetm.cannot_modify_jumps_p ())
     return false;
-  return (optimize > 0 && flag_expensive_optimizations);
+  return (optimize > 0
+	  && flag_expensive_optimizations
+	  && ! optimize_function_for_size_p (cfun));
 }
 
 
@@ -2072,9 +2074,6 @@ duplicate_computed_gotos (void)
 	  || single_pred_p (single_succ (bb)))
 	continue;
 
-      if (!optimize_bb_for_size_p (bb))
-	continue;
-
       /* The successor block has to be a duplication candidate.  */
       if (!bitmap_bit_p (candidates, single_succ (bb)->index))
 	continue;