Deoptimize context value in Turbofan (and Crankshaft).

src/compiler/instruction.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_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 695 matching lines @@
       : bailout_id_(bailout_id),
         parameters_count_(parameters_count),
         locals_count_(locals_count),
         stack_count_(stack_count) {}
 
   BailoutId bailout_id() const { return bailout_id_; }
   int parameters_count() { return parameters_count_; }
   int locals_count() { return locals_count_; }
   int stack_count() { return stack_count_; }
 
-  int size() { return parameters_count_ + locals_count_ + stack_count_; }
+  int size() {
+    return parameters_count_ + locals_count_ + stack_count_ +
+           1;  // Includes context.
+  }
 
  private:
   BailoutId bailout_id_;
   int parameters_count_;
   int locals_count_;
   int stack_count_;
 };
 
 OStream& operator<<(OStream& os, const Constant& constant);
 
@@ skipping 134 matching lines @@
   DeoptimizationVector deoptimization_entries_;
 };
 
 OStream& operator<<(OStream& os, const InstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_