001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.truffle;
024
025import static com.oracle.graal.truffle.TruffleCompilerOptions.*;
026
027import com.oracle.truffle.api.*;
028
029public class DefaultInliningPolicy implements TruffleInliningPolicy {
030
031    private static final String REASON_RECURSION = "number of recursions > " + TruffleMaximumRecursiveInlining.getValue();
032    private static final String REASON_MAXIMUM_NODE_COUNT = "deepNodeCount * callSites  > " + TruffleInliningMaxCallerSize.getValue();
033    private static final String REASON_MAXIMUM_TOTAL_NODE_COUNT = "totalNodeCount > " + TruffleInliningMaxCallerSize.getValue();
034
035    @Override
036    public double calculateScore(TruffleInliningProfile profile) {
037        return profile.getFrequency() / profile.getDeepNodeCount();
038    }
039
040    @Override
041    public boolean isAllowed(TruffleInliningProfile profile, int currentNodeCount, CompilerOptions options) {
042        if (profile.getRecursions() > TruffleMaximumRecursiveInlining.getValue()) {
043            profile.setFailedReason(REASON_RECURSION);
044            return false;
045        }
046
047        int inliningMaxCallerSize = TruffleInliningMaxCallerSize.getValue();
048
049        if (options instanceof GraalCompilerOptions) {
050            inliningMaxCallerSize = Math.max(inliningMaxCallerSize, ((GraalCompilerOptions) options).getMinInliningMaxCallerSize());
051        }
052
053        if (currentNodeCount + profile.getDeepNodeCount() > inliningMaxCallerSize) {
054            profile.setFailedReason(REASON_MAXIMUM_TOTAL_NODE_COUNT);
055            return false;
056        }
057
058        if (profile.isForced()) {
059            return true;
060        }
061
062        int cappedCallSites = Math.min(Math.max(profile.getCallSites(), 1), 10);
063        if (profile.getDeepNodeCount() * cappedCallSites > inliningMaxCallerSize) {
064            profile.setFailedReason(REASON_MAXIMUM_NODE_COUNT);
065            return false;
066        }
067
068        return true;
069    }
070}