--- old/src/share/vm/opto/chaitin.cpp	Thu Feb 16 10:56:39 2012
+++ new/src/share/vm/opto/chaitin.cpp	Thu Feb 16 10:56:39 2012
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2012, 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
@@ -1946,18 +1946,30 @@
     reg2offset_unchecked(OptoReg::add(_matcher._old_SP,-1)) - reg2offset_unchecked(_matcher._new_SP)+jintSize);
 
   // Preserve area dump
+  int regs_per_slot  = NOT_LP64(1) LP64_ONLY(2);
+  int fixed_slots = C->fixed_slots();
+  OptoReg::Name begin_in_preserve = OptoReg::add(_matcher._old_SP, -(int)C->in_preserve_stack_slots());
+  OptoReg::Name return_addr = _matcher.return_addr();
+
   reg = OptoReg::add(reg, -1);
-  while( OptoReg::is_stack(reg)) {
+  while (OptoReg::is_stack(reg)) {
     tty->print("#r%3.3d %s+%2d: ",reg,fp,reg2offset_unchecked(reg));
-    if( _matcher.return_addr() == reg )
+    if (return_addr == reg) {
       tty->print_cr("return address");
-    else if( _matcher.return_addr() == OptoReg::add(reg,1) &&
-             VerifyStackAtCalls )
-      tty->print_cr("0xBADB100D   +VerifyStackAtCalls");
-    else if ((int)OptoReg::reg2stack(reg) < C->fixed_slots())
+    } else if (reg >= begin_in_preserve) {
+      // Preserved slots are present on x86
+      if (return_addr == OptoReg::add(reg, regs_per_slot))
+        tty->print_cr("saved fp register");
+      else if (return_addr == OptoReg::add(reg, 2*regs_per_slot) &&
+               VerifyStackAtCalls)
+        tty->print_cr("0xBADB100D   +VerifyStackAtCalls");
+      else
+        tty->print_cr("in_preserve");
+    } else if ((int)OptoReg::reg2stack(reg) < fixed_slots) {
       tty->print_cr("Fixed slot %d", OptoReg::reg2stack(reg));
-    else
-      tty->print_cr("pad2, in_preserve");
+    } else {
+      tty->print_cr("pad2, stack alignment");
+    }
     reg = OptoReg::add(reg, -1);
   }