--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/ci/ciCallProfile.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,75 @@
+/*
+ * Copyright 1999-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// ciCallProfile
+//
+// This class is used to determine the frequently called method
+// at some call site
+class ciCallProfile : StackObj {
+private:
+  // Fields are initialized directly by ciMethod::call_profile_at_bci.
+  friend class ciMethod;
+
+  enum { MorphismLimit = 2 }; // Max call site's morphism we care about
+  int  _limit;                // number of receivers have been determined
+  int  _morphism;             // determined call site's morphism
+  int  _count;                // # times has this call been executed
+  int  _receiver_count[MorphismLimit + 1]; // # times receivers have been seen
+  ciMethod* _method[MorphismLimit + 1];    // receivers methods
+  ciKlass*  _receiver[MorphismLimit + 1];  // receivers (exact)
+
+  ciCallProfile() {
+    _limit = 0;
+    _morphism    = 0;
+    _count = -1;
+    _receiver_count[0] = -1;
+    _method[0]   = NULL;
+    _receiver[0] = NULL;
+  }
+
+  void add_receiver(ciKlass* receiver, int receiver_count);
+
+public:
+  // Note:  The following predicates return false for invalid profiles:
+  bool      has_receiver(int i) { return _limit > i; }
+  int       morphism()          { return _morphism; }
+
+  int       count()             { return _count; }
+  int       receiver_count(int i)  {
+    assert(i < _limit, "out of Call Profile MorphismLimit");
+    return _receiver_count[i];
+  }
+  float     receiver_prob(int i)  {
+    assert(i < _limit, "out of Call Profile MorphismLimit");
+    return (float)_receiver_count[i]/(float)_count;
+  }
+  ciMethod* method(int i)          {
+    assert(i < _limit, "out of Call Profile MorphismLimit");
+    return _method[i];
+  }
+  ciKlass*  receiver(int i)        {
+    assert(i < _limit, "out of Call Profile MorphismLimit");
+    return _receiver[i];
+  }
+};