[turbofan] Remove unused function_type_ from Typer.

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 "src/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/common-operator.h"
@@ skipping 13 matching lines @@
 class Typer::Decorator final : public GraphDecorator {
  public:
   explicit Decorator(Typer* typer) : typer_(typer) {}
   void Decorate(Node* node) final;
 
  private:
   Typer* const typer_;
 };
 
 Typer::Typer(Isolate* isolate, Graph* graph, Flags flags,
-             CompilationDependencies* dependencies, FunctionType* function_type)
+             CompilationDependencies* dependencies)
     : isolate_(isolate),
       graph_(graph),
       flags_(flags),
       dependencies_(dependencies),
-      function_type_(function_type),
       decorator_(nullptr),
       cache_(TypeCache::Get()),
       operation_typer_(isolate, zone()) {
   Zone* zone = this->zone();
   Factory* const factory = isolate->factory();
 
   Type* infinity = Type::Constant(factory->infinity_value(), zone);
   Type* minus_infinity = Type::Constant(factory->minus_infinity_value(), zone);
   // Unfortunately, the infinities created in other places might be different
   // ones (eg the result of NewNumber in TypeNumberConstant).
@@ skipping 568 matching lines @@
 
 // Control operators.
 
 Type* Typer::Visitor::TypeStart(Node* node) { return Type::Internal(); }
 
 Type* Typer::Visitor::TypeIfException(Node* node) { return Type::Any(); }
 
 
 // Common operators.
 
-
-Type* Typer::Visitor::TypeParameter(Node* node) {
-  if (FunctionType* function_type = typer_->function_type()) {
-    int const index = ParameterIndexOf(node->op());
-    if (index >= 0 && index < function_type->Arity()) {
-      return function_type->Parameter(index);
-    }
-  }
-  return Type::Any();
-}
-
+Type* Typer::Visitor::TypeParameter(Node* node) { return Type::Any(); }
 
 Type* Typer::Visitor::TypeOsrValue(Node* node) { return Type::Any(); }
 
 
 Type* Typer::Visitor::TypeInt32Constant(Node* node) {
   double number = OpParameter<int32_t>(node);
   return Type::Intersect(Type::Range(number, number, zone()),
                          Type::UntaggedIntegral32(), zone());
 }
 
@@ skipping 1891 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8