--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/ArrayConcatNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.core;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.array.*;
+
+/**
+ * Concatenate arrays.
+ */
+@NodeInfo(shortName = "array-concat")
+public final class ArrayConcatNode extends RubyNode {
+
+    @Children protected final RubyNode[] children;
+
+    public ArrayConcatNode(RubyContext context, SourceSection sourceSection, RubyNode[] children) {
+        super(context, sourceSection);
+        assert children.length > 1;
+        this.children = adoptChildren(children);
+    }
+
+    @ExplodeLoop
+    @Override
+    public Object execute(VirtualFrame frame) {
+        final RubyArray array = new RubyArray(getContext().getCoreLibrary().getArrayClass());
+
+        for (int n = 0; n < children.length; n++) {
+            final Object childObject = children[n].execute(frame);
+
+            if (childObject instanceof RubyArray) {
+                // setRangeArray has special cases for setting a zero-length range at the end
+                final int end = array.size();
+                array.setRangeArrayExclusive(end, end, (RubyArray) childObject);
+            } else {
+                array.push(childObject);
+            }
+        }
+
+        return array;
+    }
+
+    @ExplodeLoop
+    @Override
+    public void executeVoid(VirtualFrame frame) {
+        for (int n = 0; n < children.length; n++) {
+            children[n].executeVoid(frame);
+        }
+    }
+
+}