--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/stackslotalloc/SimpleStackSlotAllocator.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2014, 2015, 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.stackslotalloc;
+
+import static org.graalvm.compiler.lir.LIRValueUtil.asVirtualStackSlot;
+import static org.graalvm.compiler.lir.LIRValueUtil.isVirtualStackSlot;
+import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedFramesize;
+import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedSlots;
+import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.virtualFramesize;
+
+import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
+import org.graalvm.compiler.debug.Debug;
+import org.graalvm.compiler.debug.Debug.Scope;
+import org.graalvm.compiler.debug.Indent;
+import org.graalvm.compiler.debug.GraalError;
+import org.graalvm.compiler.lir.LIRInstruction;
+import org.graalvm.compiler.lir.ValueProcedure;
+import org.graalvm.compiler.lir.VirtualStackSlot;
+import org.graalvm.compiler.lir.framemap.FrameMapBuilderTool;
+import org.graalvm.compiler.lir.framemap.SimpleVirtualStackSlot;
+import org.graalvm.compiler.lir.framemap.VirtualStackSlotRange;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+import org.graalvm.compiler.lir.phases.AllocationPhase;
+
+import jdk.vm.ci.code.StackSlot;
+import jdk.vm.ci.code.TargetDescription;
+
+public class SimpleStackSlotAllocator extends AllocationPhase {
+
+    @Override
+    protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) {
+        allocateStackSlots((FrameMapBuilderTool) lirGenRes.getFrameMapBuilder(), lirGenRes);
+        lirGenRes.buildFrameMap();
+    }
+
+    public void allocateStackSlots(FrameMapBuilderTool builder, LIRGenerationResult res) {
+        StackSlot[] mapping = new StackSlot[builder.getNumberOfStackSlots()];
+        long currentFrameSize = allocatedFramesize.isEnabled() ? builder.getFrameMap().currentFrameSize() : 0;
+        for (VirtualStackSlot virtualSlot : builder.getStackSlots()) {
+            final StackSlot slot;
+            if (virtualSlot instanceof SimpleVirtualStackSlot) {
+                slot = mapSimpleVirtualStackSlot(builder, (SimpleVirtualStackSlot) virtualSlot);
+                virtualFramesize.add(builder.getFrameMap().spillSlotSize(virtualSlot.getValueKind()));
+            } else if (virtualSlot instanceof VirtualStackSlotRange) {
+                VirtualStackSlotRange slotRange = (VirtualStackSlotRange) virtualSlot;
+                slot = mapVirtualStackSlotRange(builder, slotRange);
+                virtualFramesize.add(builder.getFrameMap().spillSlotRangeSize(slotRange.getSlots()));
+            } else {
+                throw GraalError.shouldNotReachHere("Unknown VirtualStackSlot: " + virtualSlot);
+            }
+            allocatedSlots.increment();
+            mapping[virtualSlot.getId()] = slot;
+        }
+        updateLIR(res, mapping);
+        if (allocatedFramesize.isEnabled()) {
+            allocatedFramesize.add(builder.getFrameMap().currentFrameSize() - currentFrameSize);
+        }
+    }
+
+    @SuppressWarnings("try")
+    protected void updateLIR(LIRGenerationResult res, StackSlot[] mapping) {
+        try (Scope scope = Debug.scope("StackSlotMappingLIR")) {
+            ValueProcedure updateProc = (value, mode, flags) -> {
+                if (isVirtualStackSlot(value)) {
+                    StackSlot stackSlot = mapping[asVirtualStackSlot(value).getId()];
+                    Debug.log("map %s -> %s", value, stackSlot);
+                    return stackSlot;
+                }
+                return value;
+            };
+            for (AbstractBlockBase<?> block : res.getLIR().getControlFlowGraph().getBlocks()) {
+                try (Indent indent0 = Debug.logAndIndent("block: %s", block)) {
+                    for (LIRInstruction inst : res.getLIR().getLIRforBlock(block)) {
+                        try (Indent indent1 = Debug.logAndIndent("Inst: %d: %s", inst.id(), inst)) {
+                            inst.forEachAlive(updateProc);
+                            inst.forEachInput(updateProc);
+                            inst.forEachOutput(updateProc);
+                            inst.forEachTemp(updateProc);
+                            inst.forEachState(updateProc);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    protected StackSlot mapSimpleVirtualStackSlot(FrameMapBuilderTool builder, SimpleVirtualStackSlot virtualStackSlot) {
+        return builder.getFrameMap().allocateSpillSlot(virtualStackSlot.getValueKind());
+    }
+
+    protected StackSlot mapVirtualStackSlotRange(FrameMapBuilderTool builder, VirtualStackSlotRange virtualStackSlot) {
+        return builder.getFrameMap().allocateStackSlots(virtualStackSlot.getSlots(), virtualStackSlot.getObjects());
+    }
+}