From fd523ce046fb8b368b8b3dba6ec33007ad833fc1 Mon Sep 17 00:00:00 2001
From: cfang <unknown>
Date: Thu, 28 May 2009 09:37:18 -0700
Subject: [PATCH] 6837146: Should perform unswitch before maximally unroll in
 loop transformation Summary: Move loop unswitch before maximally unroll
 Reviewed-by: never

---
 src/share/vm/opto/loopTransform.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/share/vm/opto/loopTransform.cpp b/src/share/vm/opto/loopTransform.cpp
index 4ff59d9d4..d315a9e6c 100644
--- a/src/share/vm/opto/loopTransform.cpp
+++ b/src/share/vm/opto/loopTransform.cpp
@@ -1630,6 +1630,10 @@ bool IdealLoopTree::iteration_split_impl( PhaseIdealLoop *phase, Node_List &old_
   // Before attempting fancy unrolling, RCE or alignment, see if we want
   // to completely unroll this loop or do loop unswitching.
   if( cl->is_normal_loop() ) {
+    if (should_unswitch) {
+      phase->do_unswitching(this, old_new);
+      return true;
+    }
     bool should_maximally_unroll =  policy_maximally_unroll(phase);
     if( should_maximally_unroll ) {
       // Here we did some unrolling and peeling.  Eventually we will
@@ -1637,10 +1641,6 @@ bool IdealLoopTree::iteration_split_impl( PhaseIdealLoop *phase, Node_List &old_
       phase->do_maximally_unroll(this,old_new);
       return true;
     }
-    if (should_unswitch) {
-      phase->do_unswitching(this, old_new);
-      return true;
-    }
   }
 
 
-- 
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