--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/framemap/FrameMapBuilder.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2014, 2016, 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.lir.framemap;
+
+import java.util.BitSet;
+import java.util.List;
+
+import org.graalvm.compiler.lir.VirtualStackSlot;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+
+import jdk.vm.ci.code.CallingConvention;
+import jdk.vm.ci.code.CodeCacheProvider;
+import jdk.vm.ci.code.RegisterConfig;
+import jdk.vm.ci.meta.ValueKind;
+
+/**
+ * A {@link FrameMapBuilder} is used to collect all information necessary to
+ * {@linkplain #buildFrameMap create} a {@link FrameMap}.
+ */
+public abstract class FrameMapBuilder {
+
+    /**
+     * Reserves a spill slot in the frame of the method being compiled. The returned slot is aligned
+     * on its natural alignment, i.e., an 8-byte spill slot is aligned at an 8-byte boundary, unless
+     * overridden by a subclass.
+     *
+     * @param kind The kind of the spill slot to be reserved.
+     * @return A spill slot denoting the reserved memory area.
+     */
+    public abstract VirtualStackSlot allocateSpillSlot(ValueKind<?> kind);
+
+    /**
+     * Reserves a number of contiguous slots in the frame of the method being compiled. If the
+     * requested number of slots is 0, this method returns {@code null}.
+     *
+     * @param slots the number of slots to reserve
+     * @param objects specifies the indexes of the object pointer slots. The caller is responsible
+     *            for guaranteeing that each such object pointer slot is initialized before any
+     *            instruction that uses a reference map. Without this guarantee, the garbage
+     *            collector could see garbage object values.
+     * @param outObjectStackSlots if non-null, the object pointer slots allocated are added to this
+     *            list
+     * @return the first reserved stack slot (i.e., at the lowest address)
+     */
+    public abstract VirtualStackSlot allocateStackSlots(int slots, BitSet objects, List<VirtualStackSlot> outObjectStackSlots);
+
+    public abstract RegisterConfig getRegisterConfig();
+
+    public abstract CodeCacheProvider getCodeCache();
+
+    /**
+     * Informs the frame map that the compiled code calls a particular method, which may need stack
+     * space for outgoing arguments.
+     *
+     * @param cc The calling convention for the called method.
+     */
+    public abstract void callsMethod(CallingConvention cc);
+
+    /**
+     * Creates a {@linkplain FrameMap} based on the information collected by this
+     * {@linkplain FrameMapBuilder}.
+     */
+    public abstract FrameMap buildFrameMap(LIRGenerationResult result);
+}