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 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package org.graalvm.compiler.phases.common.inlining.info;

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.nodes.Invoke;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.options.OptionValues;

import org.graalvm.compiler.phases.common.CanonicalizerPhase;

import org.graalvm.compiler.phases.common.inlining.info.elem.Inlineable;

import org.graalvm.compiler.phases.tiers.HighTierContext;

import org.graalvm.compiler.phases.util.Providers;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Represents an opportunity for inlining at a given invoke, with the given weight and level. The

 * weight is the amortized weight of the additional code - so smaller is better. The level is the

 * number of nested inlinings that lead to this invoke.

 */

public interface InlineInfo {

    /**

     * The graph containing the {@link #invoke() invocation} that may be inlined.

     */

    StructuredGraph graph();

    /**

     * The invocation that may be inlined.

     */

    Invoke invoke();

    /**

     * Returns the number of methods that may be inlined by the {@link #invoke() invocation}. This

     * may be more than one in the case of a invocation profile showing a number of "hot" concrete

     * methods dispatched to by the invocation.

     */

    int numberOfMethods();

    ResolvedJavaMethod methodAt(int index);

    Inlineable inlineableElementAt(int index);

    double probabilityAt(int index);

    double relevanceAt(int index);

    void setInlinableElement(int index, Inlineable inlineableElement);

    /**

     * Performs the inlining described by this object and returns the node that represents the

     * return value of the inlined method (or null for void methods and methods that have no

     * non-exceptional exit).

     *

     * @return a collection of nodes that need to be canonicalized after the inlining

     */

    EconomicSet<Node> inline(Providers providers);

    /**

     * Try to make the call static bindable to avoid interface and virtual method calls.

     */

    void tryToDevirtualizeInvoke(Providers providers);

    boolean shouldInline();

    void populateInlinableElements(HighTierContext context, StructuredGraph caller, CanonicalizerPhase canonicalizer, OptionValues optionValues);

    int determineNodeCount();

}