diff --git a/src/compiler/js-graph.h b/src/compiler/js-graph.h
new file mode 100644
index 0000000..2b2dfd1
--- /dev/null
+++ b/src/compiler/js-graph.h
@@ -0,0 +1,120 @@
+// 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.
+
+#ifndef V8_COMPILER_JS_GRAPH_H_
+#define V8_COMPILER_JS_GRAPH_H_
+
+#include "src/compiler/common-node-cache.h"
+#include "src/compiler/common-operator.h"
+#include "src/compiler/graph.h"
+#include "src/compiler/js-operator.h"
+#include "src/compiler/machine-operator.h"
+#include "src/compiler/node-properties.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class Typer;
+
+// Implements a facade on a Graph, enhancing the graph with JS-specific
+// notions, including a builder for for JS* operators, canonicalized global
+// constants, and various helper methods.
+class JSGraph : public ZoneObject {
+ public:
+  JSGraph(Graph* graph, CommonOperatorBuilder* common,
+          JSOperatorBuilder* javascript, Typer* typer,
+          MachineOperatorBuilder* machine)
+      : graph_(graph),
+        common_(common),
+        javascript_(javascript),
+        typer_(typer),
+        machine_(machine),
+        cache_(zone()) {}
+
+  // Canonicalized global constants.
+  Node* CEntryStubConstant();
+  Node* UndefinedConstant();
+  Node* TheHoleConstant();
+  Node* TrueConstant();
+  Node* FalseConstant();
+  Node* NullConstant();
+  Node* ZeroConstant();
+  Node* OneConstant();
+  Node* NaNConstant();
+
+  // Creates a HeapConstant node, possibly canonicalized, without inspecting the
+  // object.
+  Node* HeapConstant(Unique<Object> value);
+
+  // Creates a HeapConstant node, possibly canonicalized, and may access the
+  // heap to inspect the object.
+  Node* HeapConstant(Handle<Object> value);
+
+  // Creates a Constant node of the appropriate type for the given object.
+  // Accesses the heap to inspect the object and determine whether one of the
+  // canonicalized globals or a number constant should be returned.
+  Node* Constant(Handle<Object> value);
+
+  // Creates a NumberConstant node, usually canonicalized.
+  Node* Constant(double value);
+
+  // Creates a NumberConstant node, usually canonicalized.
+  Node* Constant(int32_t value);
+
+  // Creates a Int32Constant node, usually canonicalized.
+  Node* Int32Constant(int32_t value);
+  Node* Uint32Constant(uint32_t value) {
+    return Int32Constant(bit_cast<int32_t>(value));
+  }
+
+  // Creates a Float64Constant node, usually canonicalized.
+  Node* Float64Constant(double value);
+
+  // Creates an ExternalConstant node, usually canonicalized.
+  Node* ExternalConstant(ExternalReference ref);
+
+  Node* SmiConstant(int32_t immediate) {
+    DCHECK(Smi::IsValid(immediate));
+    return Constant(immediate);
+  }
+
+  JSOperatorBuilder* javascript() { return javascript_; }
+  CommonOperatorBuilder* common() { return common_; }
+  MachineOperatorBuilder* machine() { return machine_; }
+  Graph* graph() { return graph_; }
+  Zone* zone() { return graph()->zone(); }
+  Isolate* isolate() { return zone()->isolate(); }
+
+ private:
+  Graph* graph_;
+  CommonOperatorBuilder* common_;
+  JSOperatorBuilder* javascript_;
+  Typer* typer_;
+  MachineOperatorBuilder* machine_;
+
+  SetOncePointer<Node> c_entry_stub_constant_;
+  SetOncePointer<Node> undefined_constant_;
+  SetOncePointer<Node> the_hole_constant_;
+  SetOncePointer<Node> true_constant_;
+  SetOncePointer<Node> false_constant_;
+  SetOncePointer<Node> null_constant_;
+  SetOncePointer<Node> zero_constant_;
+  SetOncePointer<Node> one_constant_;
+  SetOncePointer<Node> nan_constant_;
+
+  CommonNodeCache cache_;
+
+  Node* ImmovableHeapConstant(Handle<Object> value);
+  Node* NumberConstant(double value);
+  Node* NewNode(const Operator* op);
+
+  Factory* factory() { return isolate()->factory(); }
+};
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif