--- /dev/null	2017-11-16 08:17:56.803999947 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/gen/LIRGenerationProvider.java	2019-03-12 08:10:31.683936645 +0100
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2017, 2018, 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.core.gen;
+
+import org.graalvm.compiler.code.CompilationResult;
+import org.graalvm.compiler.core.common.CompilationIdentifier;
+import org.graalvm.compiler.lir.LIR;
+import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
+import org.graalvm.compiler.lir.asm.CompilationResultBuilderFactory;
+import org.graalvm.compiler.lir.framemap.FrameMap;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
+
+import jdk.vm.ci.code.RegisterConfig;
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+
+/**
+ * Provides compiler backend-specific generation helpers for the {@link LIRCompilerBackend}.
+ */
+public interface LIRGenerationProvider {
+    LIRGeneratorTool newLIRGenerator(LIRGenerationResult lirGenRes);
+
+    LIRGenerationResult newLIRGenerationResult(CompilationIdentifier compilationId, LIR lir, RegisterConfig registerConfig, StructuredGraph graph,
+                    Object stub);
+
+    NodeLIRBuilderTool newNodeLIRBuilder(StructuredGraph graph, LIRGeneratorTool lirGen);
+
+    /**
+     * Creates the object used to fill in the details of a given compilation result.
+     */
+    CompilationResultBuilder newCompilationResultBuilder(LIRGenerationResult lirGenResult, FrameMap frameMap, CompilationResult compilationResult,
+                    CompilationResultBuilderFactory factory);
+
+    /**
+     * Emits the code for a given graph.
+     *
+     * @param installedCodeOwner the method the compiled code will be associated with once
+     *            installed. This argument can be null.
+     */
+    void emitCode(CompilationResultBuilder crb, LIR lir, ResolvedJavaMethod installedCodeOwner);
+}