[turbofan] Factor out the function specific part from the frame state operator.

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 <iosfwd>
 #include <map>
@@ skipping 859 matching lines @@
                        FrameStateDescriptor* outer_state = nullptr);
 
   FrameStateType type() const { return type_; }
   BailoutId bailout_id() const { return bailout_id_; }
   OutputFrameStateCombine state_combine() const { return frame_state_combine_; }
   size_t parameters_count() const { return parameters_count_; }
   size_t locals_count() const { return locals_count_; }
   size_t stack_count() const { return stack_count_; }
   MaybeHandle<SharedFunctionInfo> shared_info() const { return shared_info_; }
   FrameStateDescriptor* outer_state() const { return outer_state_; }
-  bool HasContext() const { return type_ == JS_FRAME; }
+  bool HasContext() const {
+    return type_ == FrameStateType::kJavaScriptFunction;
+  }
 
   size_t GetSize(OutputFrameStateCombine combine =
                      OutputFrameStateCombine::Ignore()) const;
   size_t GetTotalSize() const;
   size_t GetFrameCount() const;
   size_t GetJSFrameCount() const;
 
   MachineType GetType(size_t index) const;
   void SetType(size_t index, MachineType type);
 
@@ skipping 310 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_