/*

 * Copyright (c) 2013, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.graalvm.compiler.nodes.spi;

import org.graalvm.compiler.api.replacements.MethodSubstitution;

import org.graalvm.compiler.api.replacements.SnippetTemplateCache;

import org.graalvm.compiler.bytecode.BytecodeProvider;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Interface for managing replacements.

 */

public interface Replacements {

    /**

     * Gets the snippet graph derived from a given method.

     *

     * @param args arguments to the snippet if available, otherwise {@code null}

     * @return the snippet graph, if any, that is derived from {@code method}

     */

    StructuredGraph getSnippet(ResolvedJavaMethod method, Object[] args);

    /**

     * Gets the snippet graph derived from a given method.

     *

     * @param recursiveEntry if the snippet contains a call to this method, it's considered as

     *            recursive call and won't be processed for {@linkplain MethodSubstitution

     *            substitutions}.

     * @param args arguments to the snippet if available, otherwise {@code null}

     * @return the snippet graph, if any, that is derived from {@code method}

     */

    StructuredGraph getSnippet(ResolvedJavaMethod method, ResolvedJavaMethod recursiveEntry, Object[] args);

    /**

     * Registers a method as snippet.

     */

    void registerSnippet(ResolvedJavaMethod method);

    /**

     * Gets a graph that is a substitution for a given method.

     *

     * @param invokeBci the call site BCI if this request is made for inlining a substitute

     *            otherwise {@code -1}

     * @return the graph, if any, that is a substitution for {@code method}

     */

    StructuredGraph getSubstitution(ResolvedJavaMethod method, int invokeBci);

    /**

     * Gets a method that is a substitution for a given method.

     *

     * @return the method, if any, whose bytecode are a substitution for {@code method}

     */

    ResolvedJavaMethod getSubstitutionMethod(ResolvedJavaMethod method);

    /**

     * Determines if there may be a {@linkplain #getSubstitution(ResolvedJavaMethod, int)

     * substitution graph} for a given method.

     *

     * A call to {@link #getSubstitution} may still return {@code null} for {@code method} and

     * {@code invokeBci}. A substitution may be based on an {@link InvocationPlugin} that returns

     * {@code false} for {@link InvocationPlugin#execute} making it impossible to create a

     * substitute graph.

     *

     * @param invokeBci the call site BCI if this request is made for inlining a substitute

     *            otherwise {@code -1}

     * @return true iff there may be a substitution graph available for {@code method}

     */

    boolean hasSubstitution(ResolvedJavaMethod method, int invokeBci);

    /**

     * Gets the provider for accessing the bytecode of a substitution method.

     */

    BytecodeProvider getReplacementBytecodeProvider();

    /**

     * Register snippet templates.

     */

    void registerSnippetTemplateCache(SnippetTemplateCache snippetTemplates);

    /**

     * Get snippet templates that were registered with

     * {@link Replacements#registerSnippetTemplateCache(SnippetTemplateCache)}.

     */

    <T extends SnippetTemplateCache> T getSnippetTemplateCache(Class<T> templatesClass);

}