[turbofan] Introduce LoadFunctionPrototype simplified operator.

src/compiler/typer.cc

 // 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.
 
 #include "src/compiler/typer.h"
 
 #include <iomanip>
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
@@ skipping 1712 matching lines @@
 Type* Typer::Visitor::TypeStoreElement(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 Type* Typer::Visitor::TypeStoreTypedElement(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
+Type* Typer::Visitor::TypeLoadFunctionPrototype(Node* node) {
+  return Type::NonInternal();
+}
+
 Type* Typer::Visitor::TypeObjectIsCallable(Node* node) {
   return TypeUnaryOp(node, ObjectIsCallable);
 }
 
 Type* Typer::Visitor::TypeObjectIsNumber(Node* node) {
   return TypeUnaryOp(node, ObjectIsNumber);
 }
 
 
 Type* Typer::Visitor::TypeObjectIsReceiver(Node* node) {
@@ skipping 22 matching lines @@
 Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::NewConstant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8