--- a/hotspot/src/share/vm/opto/loopnode.cpp	Tue Feb 01 10:27:02 2011 -0800
+++ b/hotspot/src/share/vm/opto/loopnode.cpp	Mon Feb 07 09:46:01 2011 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1480,6 +1480,8 @@
 // Create a PhaseLoop.  Build the ideal Loop tree.  Map each Ideal Node to
 // its corresponding LoopNode.  If 'optimize' is true, do some loop cleanups.
 void PhaseIdealLoop::build_and_optimize(bool do_split_ifs, bool do_loop_pred) {
+  ResourceMark rm;
+
   int old_progress = C->major_progress();
 
   // Reset major-progress flag for the driver's heuristics
@@ -2013,7 +2015,7 @@
   if (_dom_stk == NULL) {
     uint init_size = C->unique() / 100; // Guess that 1/100 is a reasonable initial size.
     if (init_size < 10) init_size = 10;
-    _dom_stk = new (C->node_arena()) GrowableArray<uint>(C->node_arena(), init_size, 0, 0);
+    _dom_stk = new GrowableArray<uint>(init_size);
   }
   // Compute new depth for each node.
   for (i = 0; i < _idom_size; i++) {

--- a/hotspot/src/share/vm/opto/loopnode.hpp	Tue Feb 01 10:27:02 2011 -0800
+++ b/hotspot/src/share/vm/opto/loopnode.hpp	Mon Feb 07 09:46:01 2011 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -700,7 +700,7 @@
   PhaseIdealLoop( PhaseIterGVN &igvn) :
     PhaseTransform(Ideal_Loop),
     _igvn(igvn),
-    _dom_lca_tags(C->comp_arena()),
+    _dom_lca_tags(arena()), // Thread::resource_area
     _verify_me(NULL),
     _verify_only(true) {
     build_and_optimize(false, false);
@@ -721,7 +721,7 @@
   PhaseIdealLoop( PhaseIterGVN &igvn, bool do_split_ifs, bool do_loop_pred) :
     PhaseTransform(Ideal_Loop),
     _igvn(igvn),
-    _dom_lca_tags(C->comp_arena()),
+    _dom_lca_tags(arena()), // Thread::resource_area
     _verify_me(NULL),
     _verify_only(false) {
     build_and_optimize(do_split_ifs, do_loop_pred);
@@ -731,7 +731,7 @@
   PhaseIdealLoop( PhaseIterGVN &igvn, const PhaseIdealLoop *verify_me) :
     PhaseTransform(Ideal_Loop),
     _igvn(igvn),
-    _dom_lca_tags(C->comp_arena()),
+    _dom_lca_tags(arena()), // Thread::resource_area
     _verify_me(verify_me),
     _verify_only(false) {
     build_and_optimize(false, false);