# HG changeset patch
# User kvn
# Date 1415044960 28800
# Node ID 7024b693c8f9f3fdc75454c040ca0d2bdfe36bfc
# Parent  28ab1380ec65d0425da9b33316e38a2966058297
8059780: SPECjvm2008-MPEG performance regressions on x64 platforms
Summary: Back-out 8052081 changes made in lcm.cpp.
Reviewed-by: iveresov, roland

diff -r 28ab1380ec65 -r 7024b693c8f9 src/share/vm/opto/lcm.cpp
--- a/src/share/vm/opto/lcm.cpp	Thu Nov 06 12:05:43 2014 +0000
+++ b/src/share/vm/opto/lcm.cpp	Mon Nov 03 12:02:40 2014 -0800
@@ -484,9 +484,7 @@
         iop == Op_CreateEx ||   // Create-exception must start block
         iop == Op_CheckCastPP
         ) {
-      // select the node n
-      // remove n from worklist and retain the order of remaining nodes
-      worklist.remove((uint)i);
+      worklist.map(i,worklist.pop());
       return n;
     }
 
@@ -572,9 +570,7 @@
   assert(idx >= 0, "index should be set");
   Node *n = worklist[(uint)idx];      // Get the winner
 
-  // select the node n
-  // remove n from worklist and retain the order of remaining nodes
-  worklist.remove((uint)idx);
+  worklist.map((uint)idx, worklist.pop());     // Compress worklist
   return n;
 }