[turbofan] Optimize API function calls based on inferred receiver maps.

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"
 
@@ skipping 23 matching lines @@
         jsgraph_(jsgraph),
         native_context_(native_context),
         dependencies_(dependencies) {}
 
   Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceArrayConstructor(Node* node);
   Reduction ReduceBooleanConstructor(Node* node);
   Reduction ReduceCallApiFunction(
-      Node* node, Node* target,
-      Handle<FunctionTemplateInfo> function_template_info);
+      Node* node, Handle<FunctionTemplateInfo> function_template_info);
   Reduction ReduceNumberConstructor(Node* node);
   Reduction ReduceFunctionPrototypeApply(Node* node);
   Reduction ReduceFunctionPrototypeCall(Node* node);
   Reduction ReduceFunctionPrototypeHasInstance(Node* node);
   Reduction ReduceObjectGetPrototype(Node* node, Node* object);
   Reduction ReduceObjectGetPrototypeOf(Node* node);
   Reduction ReduceObjectPrototypeGetProto(Node* node);
   Reduction ReduceReflectGetPrototypeOf(Node* node);
   Reduction ReduceSpreadCall(Node* node, int arity);
   Reduction ReduceJSConstruct(Node* node);
   Reduction ReduceJSConstructWithSpread(Node* node);
   Reduction ReduceJSCall(Node* node);
   Reduction ReduceJSCallWithSpread(Node* node);
 
-  enum HolderLookup { kHolderNotFound, kHolderIsReceiver, kHolderFound };
-
-  HolderLookup LookupHolder(Handle<JSObject> object,
-                            Handle<FunctionTemplateInfo> function_template_info,
-                            Handle<JSObject>* holder);
-
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
   Factory* factory() const;
   Handle<Context> native_context() const { return native_context_; }
+  Handle<JSGlobalProxy> global_proxy() const;
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
   CompilationDependencies* dependencies() const { return dependencies_; }
 
   JSGraph* const jsgraph_;
   Handle<Context> const native_context_;
   CompilationDependencies* const dependencies_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_CALL_REDUCER_H_