diff graal/com.oracle.max.cri/src/com/sun/cri/ri/RiTypeProfile.java @ 3733:e233f5660da4

Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
parents
children bc8527f3071c
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.cri/src/com/sun/cri/ri/RiTypeProfile.java	Sat Dec 17 19:59:18 2011 +0100
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+/*
+ * Copyright (c) 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
+ * 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.
+ */
+package com.sun.cri.ri;
+
+import java.io.*;
+
+/**
+ * This profile object represents the type profile of one call site, cast or instanceof instruction. The precision of
+ * the supplied values may vary, but a runtime that provides this information should be aware that it will be used to
+ * guide performance-critical decisions like speculative inlining, etc.
+ */
+public class RiTypeProfile implements Serializable {
+
+    /**
+     * How often the instruction was executed, which may be used to judge the maturity of this profile.
+     */
+    public int count;
+
+    /**
+     * An estimation of how many different receiver types were encountered. This may or may not be the same as
+     * probabilities.length/types.length, as the runtime may store probabilities for a limited number of receivers.
+     */
+    public int morphism;
+
+    /**
+     * A list of receivers for which the runtime has recorded probability information. This array needs to have the same
+     * length as {@link RiTypeProfile#probabilities}.
+     */
+    public RiResolvedType[] types;
+
+    /**
+     * The estimated probabilities of the different receivers. This array needs to have the same length as
+     * {@link RiTypeProfile#types}.
+     */
+    public float[] probabilities;
+}