diff --git a/tools/turbolizer/node.js b/tools/turbolizer/node.js
new file mode 100644
index 0000000..18ce0e7
--- /dev/null
+++ b/tools/turbolizer/node.js
@@ -0,0 +1,138 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var DEFAULT_NODE_WIDTH = 240;
+var DEFAULT_NODE_HEIGHT = 40;
+var TYPE_HEIGHT = 25;
+var DEFAULT_NODE_BUBBLE_RADIUS = 4;
+var NODE_INPUT_WIDTH = 20;
+var MINIMUM_NODE_INPUT_APPROACH = 20;
+var MINIMUM_NODE_OUTPUT_APPROACH = 15;
+
+function isNodeInitiallyVisible(node) {
+  return node.cfg;
+}
+
+var Node = {
+  isControl: function() {
+    return this.control;
+  },
+  isInput: function() {
+    return this.opcode == 'Parameter' || this.opcode.endsWith('Constant');
+  },
+  isJavaScript: function() {
+    return this.opcode.startsWith('JS');
+  },
+  isSimplified: function() {
+    if (this.isJavaScript) return false;
+    return this.opcode.endsWith('Phi') ||
+      this.opcode.startsWith('Boolean') ||
+      this.opcode.startsWith('Number') ||
+      this.opcode.startsWith('String') ||
+      this.opcode.startsWith('Change') ||
+      this.opcode.startsWith('Object') ||
+      this.opcode.startsWith('Reference') ||
+      this.opcode.startsWith('Any') ||
+      this.opcode.endsWith('ToNumber') ||
+      (this.opcode == 'AnyToBoolean') ||
+      (this.opcode.startsWith('Load') && this.opcode.length > 4) ||
+      (this.opcode.startsWith('Store') && this.opcode.length > 5);
+  },
+  isMachine: function() {
+    return !(this.isControl() || this.isInput() ||
+             this.isJavaScript() || this.isSimplified());
+  },
+  getTotalNodeWidth: function() {
+    var inputWidth = this.inputs.length * NODE_INPUT_WIDTH;
+    return Math.max(inputWidth, this.width);
+  },
+  getLabel: function() {
+    return this.label;
+  },
+  getDisplayLabel: function() {
+    var result = this.id + ":" + this.label;
+    if (result.length > 30) {
+      return this.id + ":" + this.opcode;
+    } else  {
+      return result;
+    }
+  },
+  getType: function() {
+    return this.type;
+  },
+  getDisplayType: function() {
+    var type_string = this.type;
+    if (type_string == undefined) return "";
+    if (type_string.length > 24) {
+      type_string = type_string.substr(0, 25) + "...";
+    }
+    return type_string;
+  },
+  deepestInputRank: function() {
+    var deepestRank = 0;
+    this.inputs.forEach(function(e) {
+      if (e.isVisible() && !e.isBackEdge()) {
+        if (e.source.rank > deepestRank) {
+          deepestRank = e.source.rank;
+        }
+      }
+    });
+    return deepestRank;
+  },
+  areAnyOutputsVisible: function() {
+    var visibleCount = 0;
+    this.outputs.forEach(function(e) { if (e.isVisible()) ++visibleCount; });
+    if (this.outputs.length == visibleCount) return 2;
+    if (visibleCount != 0) return 1;
+    return 0;
+  },
+  setOutputVisibility: function(v) {
+    var result = false;
+    this.outputs.forEach(function(e) {
+      e.visible = v;
+      if (v) {
+        if (!e.target.visible) {
+          e.target.visible = true;
+          result = true;
+        }
+      }
+    });
+    return result;
+  },
+  setInputVisibility: function(i, v) {
+    var edge = this.inputs[i];
+    edge.visible = v;
+    if (v) {
+      if (!edge.source.visible) {
+        edge.source.visible = true;
+        return true;
+      }
+    }
+    return false;
+  },
+  getInputApproach: function(index) {
+    return this.y - MINIMUM_NODE_INPUT_APPROACH -
+      (index % 4) * MINIMUM_EDGE_SEPARATION - DEFAULT_NODE_BUBBLE_RADIUS
+  },
+  getOutputApproach: function(graph, index) {
+    return this.y + this.outputApproach + graph.getNodeHeight() +
+      + DEFAULT_NODE_BUBBLE_RADIUS;
+  },
+  getInputX: function(index) {
+    var result = this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2) +
+        (index - this.inputs.length + 1) * NODE_INPUT_WIDTH;
+    return result;
+  },
+  getOutputX: function() {
+    return this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2);
+  },
+  getFunctionRelativeSourcePosition: function(graph) {
+    return this.pos - graph.sourcePosition;
+  },
+  hasBackEdges: function() {
+    return (this.opcode == "Loop") ||
+      ((this.opcode == "Phi" || this.opcode == "EffectPhi") &&
+       this.inputs[this.inputs.length - 1].source.opcode == "Loop");
+  }
+};