Mercurial > hg > truffle

comparison graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/LoopSafepointInsertionPhase.java @ 11760:ce0b00597980

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
made safepoint-on-return use specialized HotSpot runtime support for such safepoints (which have no debug info attached)
author Doug Simon <doug.simon@oracle.com>
date Tue, 24 Sep 2013 08:51:02 +0200
parents graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/SafepointInsertionPhase.java@2b2de196d8f9
children d90e5c22ba55
comparison
equal deleted inserted replaced
11759:8bcd76c3f23b 11760:ce0b00597980
1 /*
2 * Copyright (c) 2011, 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.
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.oracle.graal.phases.common;
24
25 import static com.oracle.graal.phases.GraalOptions.*;
26
27 import com.oracle.graal.nodes.*;
28 import com.oracle.graal.phases.*;
29
30 /**
31 * Adds safepoints to loops.
32 */
33 public class LoopSafepointInsertionPhase extends Phase {
34
35 @Override
36 protected void run(StructuredGraph graph) {
37 if (GenLoopSafepoints.getValue()) {
38 for (LoopEndNode loopEndNode : graph.getNodes(LoopEndNode.class)) {
39 if (loopEndNode.canSafepoint()) {
40 SafepointNode safepointNode = graph.add(new SafepointNode());
41 graph.addBeforeFixed(loopEndNode, safepointNode);
42 }
43 }
44 }
45 }
46 }