diff -r 108d0c7b60f9 -r aec7e8963c3e hotspot/src/os/windows/vm/chaitin_windows.cpp
--- a/hotspot/src/os/windows/vm/chaitin_windows.cpp	Wed May 01 12:25:43 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,78 +0,0 @@
-/*
- * Copyright (c) 1999, 2010, 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
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "opto/chaitin.hpp"
-#include "opto/machnode.hpp"
-
-// Disallow the use of the frame pointer (EBP) for implicit null exceptions
-// on win95/98.  If we do not do this, the OS gets confused and gives a stack
-// error.
-void PhaseRegAlloc::pd_preallocate_hook() {
-#ifndef _WIN64
-  if (ImplicitNullChecks && !os::win32::is_nt()) {
-    for (uint block_num=1; block_num<_cfg._num_blocks; block_num++) {
-      Block *block = _cfg._blocks[block_num];
-
-      Node *block_end = block->end();
-      if (block_end->is_MachNullCheck() &&
-          block_end->as_Mach()->ideal_Opcode() != Op_Con) {
-        // The last instruction in the block is an implicit null check.
-        // Fix its input so that it does not load into the frame pointer.
-        _matcher.pd_implicit_null_fixup(block_end->in(1)->as_Mach(),
-                                        block_end->as_MachNullCheck()->_vidx);
-      }
-    }
-  }
-#else
-  // WIN64==itanium on XP
-#endif
-}
-
-#ifdef ASSERT
-// Verify that no implicit null check uses the frame pointer (EBP) as
-// its register on win95/98.  Use of the frame pointer in an implicit
-// null check confuses the OS, yielding a stack error.
-void PhaseRegAlloc::pd_postallocate_verify_hook() {
-#ifndef _WIN64
-  if (ImplicitNullChecks && !os::win32::is_nt()) {
-    for (uint block_num=1; block_num<_cfg._num_blocks; block_num++) {
-      Block *block = _cfg._blocks[block_num];
-
-      Node *block_end = block->_nodes[block->_nodes.size()-1];
-      if (block_end->is_MachNullCheck() && block_end->as_Mach()->ideal_Opcode() != Op_Con) {
-        // The last instruction in the block is an implicit
-        // null check.  Verify that this instruction does not
-        // use the frame pointer.
-        int reg = get_reg_first(block_end->in(1)->in(block_end->as_MachNullCheck()->_vidx));
-        assert(reg != EBP_num,
-               "implicit null check using frame pointer on win95/98");
-      }
-    }
-  }
-#else
-  // WIN64==itanium on XP
-#endif
-}
-#endif