[turbofan] Move JSCallFunction specialization to JSCallReducer.

src/compiler/js-call-reducer.h

 // Copyright 2015 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_CALL_REDUCER_H_
 #define V8_COMPILER_JS_CALL_REDUCER_H_
 
+#include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
+class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
+class SimplifiedOperatorBuilder;
 
 
 // Performs strength reduction on {JSCallFunction} nodes, which might allow
 // inlining or other optimizations to be performed afterwards.
 class JSCallReducer final : public Reducer {
  public:
-  explicit JSCallReducer(JSGraph* jsgraph) : jsgraph_(jsgraph) {}
+  // Flags that control the mode of operation.
+  enum Flag {
+    kNoFlags = 0u,
+    kDeoptimizationEnabled = 1u << 0,
+  };
+  typedef base::Flags<Flag> Flags;
+
+  JSCallReducer(JSGraph* jsgraph, Flags flags)
+      : jsgraph_(jsgraph), flags_(flags) {}
 
   Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceFunctionPrototypeApply(Node* node);
   Reduction ReduceFunctionPrototypeCall(Node* node);
+  Reduction ReduceJSCallFunction(Node* node);
 
   Graph* graph() const;
+  Flags flags() const { return flags_; }
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
+  CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
+  SimplifiedOperatorBuilder* simplified() const;
 
   JSGraph* const jsgraph_;
+  Flags const flags_;
 };
 
+DEFINE_OPERATORS_FOR_FLAGS(JSCallReducer::Flags)
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_CALL_REDUCER_H_