EarlyReadEliminationPhase.java revision 12657:6ef01bd40ce2 
1/*
2 * Copyright (c) 2011, 2012, 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 */
23package org.graalvm.compiler.virtual.phases.ea;
24
25import static org.graalvm.compiler.core.common.GraalOptions.EscapeAnalyzeOnly;
26
27import org.graalvm.compiler.nodes.StructuredGraph;
28import org.graalvm.compiler.nodes.StructuredGraph.ScheduleResult;
29import org.graalvm.compiler.nodes.cfg.ControlFlowGraph;
30import org.graalvm.compiler.phases.common.CanonicalizerPhase;
31import org.graalvm.compiler.phases.tiers.PhaseContext;
32
33public class EarlyReadEliminationPhase extends EffectsPhase<PhaseContext> {
34
35    public EarlyReadEliminationPhase(CanonicalizerPhase canonicalizer) {
36        super(1, canonicalizer, true);
37    }
38
39    @Override
40    protected void run(StructuredGraph graph, PhaseContext context) {
41        if (VirtualUtil.matches(graph, EscapeAnalyzeOnly.getValue())) {
42            runAnalysis(graph, context);
43        }
44    }
45
46    @Override
47    protected Closure<?> createEffectsClosure(PhaseContext context, ScheduleResult schedule, ControlFlowGraph cfg) {
48        assert schedule == null;
49        return new ReadEliminationClosure(cfg);
50    }
51}
52