--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/BasicObjectNodes.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,162 @@
+/*
+ * 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 java.math.*;
+import java.util.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+import com.oracle.truffle.ruby.runtime.objects.*;
+
+@CoreClass(name = "BasicObject")
+public abstract class BasicObjectNodes {
+
+    @CoreMethod(names = "!", needsSelf = false, maxArgs = 0)
+    public abstract static class NotNode extends CoreMethodNode {
+
+        public NotNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public NotNode(NotNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public boolean not() {
+            return false;
+        }
+
+    }
+
+    @CoreMethod(names = "==", minArgs = 1, maxArgs = 1)
+    public abstract static class EqualNode extends CoreMethodNode {
+
+        public EqualNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public EqualNode(EqualNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public boolean equal(Object a, Object b) {
+            // TODO(CS) ideally all classes would do this in their own nodes
+            return a.equals(b);
+        }
+
+    }
+
+    @CoreMethod(names = "!=", minArgs = 1, maxArgs = 1)
+    public abstract static class NotEqualNode extends CoreMethodNode {
+
+        public NotEqualNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public NotEqualNode(NotEqualNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public boolean notEqual(Object a, Object b) {
+            // TODO(CS) ideally all classes would do this in their own nodes
+            return !a.equals(b);
+        }
+
+    }
+
+    @CoreMethod(names = "equal?", minArgs = 1, maxArgs = 1)
+    public abstract static class ReferenceEqualNode extends CoreMethodNode {
+
+        public ReferenceEqualNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public ReferenceEqualNode(ReferenceEqualNode prev) {
+            super(prev);
+        }
+
+        @Specialization(order = 1)
+        public boolean equal(@SuppressWarnings("unused") NilPlaceholder a, @SuppressWarnings("unused") NilPlaceholder b) {
+            return true;
+        }
+
+        @Specialization(order = 2)
+        public boolean equal(int a, int b) {
+            return a == b;
+        }
+
+        @Specialization(order = 3)
+        public boolean equal(double a, double b) {
+            return a == b;
+        }
+
+        @Specialization(order = 4)
+        public boolean equal(BigInteger a, BigInteger b) {
+            return a.compareTo(b) == 0;
+        }
+
+        @Specialization(order = 5)
+        public boolean equal(RubyBasicObject a, RubyBasicObject b) {
+            return a == b;
+        }
+    }
+
+    @CoreMethod(names = "initialize", needsSelf = false, maxArgs = 0)
+    public abstract static class InitializeNode extends CoreMethodNode {
+
+        public InitializeNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public InitializeNode(InitializeNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public NilPlaceholder initiailze() {
+            return NilPlaceholder.INSTANCE;
+        }
+
+    }
+
+    @CoreMethod(names = {"send", "__send__"}, needsSelf = true, needsBlock = true, minArgs = 1, isSplatted = true)
+    public abstract static class SendNode extends CoreMethodNode {
+
+        public SendNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public SendNode(SendNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public Object send(RubyBasicObject self, Object[] args, @SuppressWarnings("unused") UndefinedPlaceholder block) {
+            final String name = args[0].toString();
+            final Object[] sendArgs = Arrays.copyOfRange(args, 1, args.length);
+            return self.send(name, null, sendArgs);
+        }
+
+        @Specialization
+        public Object send(RubyBasicObject self, Object[] args, RubyProc block) {
+            final String name = args[0].toString();
+            final Object[] sendArgs = Arrays.copyOfRange(args, 1, args.length);
+            return self.send(name, block, sendArgs);
+        }
+
+    }
+
+}