--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/spi/Replacements.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,121 @@
+/*
+ * 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.Bytecode;
+import org.graalvm.compiler.bytecode.BytecodeProvider;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
+import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
+import org.graalvm.compiler.options.OptionValues;
+
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+
+/**
+ * Interface for managing replacements.
+ */
+public interface Replacements {
+
+    OptionValues getOptions();
+
+    /**
+     * Gets the object managing the various graph builder plugins used by this object when parsing
+     * bytecode into a graph.
+     */
+    GraphBuilderConfiguration.Plugins getGraphBuilderPlugins();
+
+    /**
+     * 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 the substitute bytecode for a given method.
+     *
+     * @return the bytecode to substitute for {@code method} or {@code null} if there is no
+     *         substitute bytecode for {@code method}
+     */
+    Bytecode getSubstitutionBytecode(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 if no other provider is
+     * associated with the substitution method.
+     */
+    BytecodeProvider getDefaultReplacementBytecodeProvider();
+
+    /**
+     * 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);
+}