Mercurial > hg > graal-compiler
comparison graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/BranchProfile.java @ 13335:8531c47138dc
Truffle: introduced new profiling utility BranchProfile.
author | Christian Humer <christian.humer@gmail.com> |
---|---|
date | Sun, 15 Dec 2013 22:19:19 +0100 |
parents | |
children | a0200c215fb2 64dcb92ee75a |
comparison
equal
deleted
inserted
replaced
13334:39694f3b0ed9 | 13335:8531c47138dc |
---|---|
1 /* | |
2 * Copyright (c) 2013, 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. Oracle designates this | |
8 * particular file as subject to the "Classpath" exception as provided | |
9 * by Oracle in the LICENSE file that accompanied this code. | |
10 * | |
11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 * version 2 for more details (a copy is included in the LICENSE file that | |
15 * accompanied this code). | |
16 * | |
17 * You should have received a copy of the GNU General Public License version | |
18 * 2 along with this work; if not, write to the Free Software Foundation, | |
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
20 * | |
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
22 * or visit www.oracle.com if you need additional information or have any | |
23 * questions. | |
24 */ | |
25 package com.oracle.truffle.api.utilities; | |
26 | |
27 import com.oracle.truffle.api.*; | |
28 import com.oracle.truffle.api.CompilerDirectives.*; | |
29 | |
30 /** | |
31 * Utility class to speculate on branches to be never visited. If the {@link #enter()} method is | |
32 * invoked first the optimized code is invalidated and the branch where {@link #enter()} is invoked | |
33 * is enabled for compilation. Otherwise if the {@link #enter()} method was never invoked the branch | |
34 * will not get compiled. | |
35 */ | |
36 public final class BranchProfile { | |
37 | |
38 @CompilationFinal private boolean visited; | |
39 | |
40 public void enter() { | |
41 if (!visited) { | |
42 CompilerDirectives.transferToInterpreterAndInvalidate(); | |
43 visited = true; | |
44 } | |
45 } | |
46 | |
47 } |