Make FrameStates recursive (to be used for inlining).

src/compiler/raw-machine-assembler.h

 // 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_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/common-operator.h"
@@ skipping 46 matching lines @@
   CallDescriptor* call_descriptor() const {
     return call_descriptor_builder_->BuildCallDescriptor(zone());
   }
   int parameter_count() const {
     return call_descriptor_builder_->parameter_count();
   }
   const MachineType* parameter_types() const {
     return call_descriptor_builder_->parameter_types();
   }
 
+  Node* UndefinedConstant() {
+    PrintableUnique<Object> unique = PrintableUnique<Object>::CreateImmovable(
+        zone(), isolate()->factory()->undefined_value());
+    return NewNode(common()->HeapConstant(unique));
+  }
+
   // Parameters.
   Node* Parameter(int index);
 
   // Control flow.
   Label* Exit();
   void Goto(Label* label);
   void Branch(Node* condition, Label* true_val, Label* false_val);
   // Call through CallFunctionStub with lazy deopt and frame-state.
   Node* CallFunctionStub0(Node* function, Node* receiver, Node* context,
                           Node* frame_state, CallFunctionFlags flags);
@@ skipping 42 matching lines @@
   BasicBlock* current_block_;
 
   DISALLOW_COPY_AND_ASSIGN(RawMachineAssembler);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_