call-optimization.h

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// 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_IC_CALL_OPTIMIZATION_H_
#define V8_IC_CALL_OPTIMIZATION_H_
 
#include "src/code-stubs.h"
#include "src/ic/access-compiler.h"
#include "src/macro-assembler.h"
#include "src/objects.h"
 
namespace v8 {
namespace internal {
// Holds information about possible function call optimizations.
class CallOptimization BASE_EMBEDDED {
 public:
  explicit CallOptimization(Handle<JSFunction> function);
 
  bool is_constant_call() const { return !constant_function_.is_null(); }
 
  Handle<JSFunction> constant_function() const {
    DCHECK(is_constant_call());
    return constant_function_;
  }
 
  bool is_simple_api_call() const { return is_simple_api_call_; }
 
  Handle<FunctionTemplateInfo> expected_receiver_type() const {
    DCHECK(is_simple_api_call());
    return expected_receiver_type_;
  }
 
  Handle<CallHandlerInfo> api_call_info() const {
    DCHECK(is_simple_api_call());
    return api_call_info_;
  }
 
  enum HolderLookup { kHolderNotFound, kHolderIsReceiver, kHolderFound };
  Handle<JSObject> LookupHolderOfExpectedType(
      Handle<Map> receiver_map, HolderLookup* holder_lookup) const;
 
  // Check if the api holder is between the receiver and the holder.
  bool IsCompatibleReceiver(Handle<Object> receiver,
                            Handle<JSObject> holder) const;
 
 private:
  void Initialize(Handle<JSFunction> function);
 
  // Determines whether the given function can be called using the
  // fast api call builtin.
  void AnalyzePossibleApiFunction(Handle<JSFunction> function);
 
  Handle<JSFunction> constant_function_;
  bool is_simple_api_call_;
  Handle<FunctionTemplateInfo> expected_receiver_type_;
  Handle<CallHandlerInfo> api_call_info_;
};
}
}  // namespace v8::internal
 
#endif  // V8_IC_CALL_OPTIMIZATION_H_