Deoptimize context value in Turbofan (and Crankshaft).

src/deoptimizer.h

 // Copyright 2012 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_DEOPTIMIZER_H_
 #define V8_DEOPTIMIZER_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 904 matching lines @@
   int parameters_count() { return parameters_count_; }
 
   // Return the height of the expression stack.
   int expression_count() { return expression_count_; }
 
   // Get the frame function.
   JSFunction* GetFunction() {
     return function_;
   }
 
+  // Get the frame context.
+  Object* GetContext() { return context_; }
+
   // Check if this frame is preceded by construct stub frame.  The bottom-most
   // inlined frame might still be called by an uninlined construct stub.
   bool HasConstructStub() {
     return has_construct_stub_;
   }
 
   // Get an incoming argument.
   Object* GetParameter(int index) {
     DCHECK(0 <= index && index < parameters_count());
     return parameters_[index];
@@ skipping 16 matching lines @@
     parameters_[index] = obj;
   }
 
   // Set an expression on the expression stack.
   void SetExpression(int index, Object* obj) {
     DCHECK(0 <= index && index < expression_count());
     expression_stack_[index] = obj;
   }
 
   JSFunction* function_;
+  Object* context_;
   bool has_construct_stub_;
   int parameters_count_;
   int expression_count_;
   Object** parameters_;
   Object** expression_stack_;
   int source_position_;
 
   friend class Deoptimizer;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEOPTIMIZER_H_