Mercurial > hg > truffle

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
comparison
equal deleted inserted replaced
3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.sun.cri.ri;
24
25 import java.io.*;
26
27 /**
28 * This profile object represents the type profile of one call site, cast or instanceof instruction. The precision of
29 * the supplied values may vary, but a runtime that provides this information should be aware that it will be used to
30 * guide performance-critical decisions like speculative inlining, etc.
31 */
32 public class RiTypeProfile implements Serializable {
33
34 /**
35 * How often the instruction was executed, which may be used to judge the maturity of this profile.
36 */
37 public int count;
38
39 /**
40 * An estimation of how many different receiver types were encountered. This may or may not be the same as
41 * probabilities.length/types.length, as the runtime may store probabilities for a limited number of receivers.
42 */
43 public int morphism;
44
45 /**
46 * A list of receivers for which the runtime has recorded probability information. This array needs to have the same
47 * length as {@link RiTypeProfile#probabilities}.
48 */
49 public RiResolvedType[] types;
50
51 /**
52 * The estimated probabilities of the different receivers. This array needs to have the same length as
53 * {@link RiTypeProfile#types}.
54 */
55 public float[] probabilities;
56 }