1// Copyright 2014 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_IC_CALL_OPTIMIZATION_H_
6#define V8_IC_CALL_OPTIMIZATION_H_
7
8#include "src/api-arguments.h"
9#include "src/objects.h"
10
11namespace v8 {
12namespace internal {
13// Holds information about possible function call optimizations.
14class CallOptimization {
15 public:
16 CallOptimization(Isolate* isolate, Handle<Object> function);
17
18 Context GetAccessorContext(Map holder_map) const;
19 bool IsCrossContextLazyAccessorPair(Context native_context,
20 Map holder_map) const;
21
22 bool is_constant_call() const { return !constant_function_.is_null(); }
23
24 Handle<JSFunction> constant_function() const {
25 DCHECK(is_constant_call());
26 return constant_function_;
27 }
28
29 bool is_simple_api_call() const { return is_simple_api_call_; }
30
31 Handle<FunctionTemplateInfo> expected_receiver_type() const {
32 DCHECK(is_simple_api_call());
33 return expected_receiver_type_;
34 }
35
36 Handle<CallHandlerInfo> api_call_info() const {
37 DCHECK(is_simple_api_call());
38 return api_call_info_;
39 }
40
41 enum HolderLookup { kHolderNotFound, kHolderIsReceiver, kHolderFound };
42 Handle<JSObject> LookupHolderOfExpectedType(
43 Handle<Map> receiver_map, HolderLookup* holder_lookup) const;
44
45 // Check if the api holder is between the receiver and the holder.
46 bool IsCompatibleReceiver(Handle<Object> receiver,
47 Handle<JSObject> holder) const;
48
49 // Check if the api holder is between the receiver and the holder.
50 bool IsCompatibleReceiverMap(Handle<Map> receiver_map,
51 Handle<JSObject> holder) const;
52
53 private:
54 void Initialize(Isolate* isolate, Handle<JSFunction> function);
55 void Initialize(Isolate* isolate,
56 Handle<FunctionTemplateInfo> function_template_info);
57
58 // Determines whether the given function can be called using the
59 // fast api call builtin.
60 void AnalyzePossibleApiFunction(Isolate* isolate,
61 Handle<JSFunction> function);
62
63 Handle<JSFunction> constant_function_;
64 bool is_simple_api_call_;
65 Handle<FunctionTemplateInfo> expected_receiver_type_;
66 Handle<CallHandlerInfo> api_call_info_;
67};
68} // namespace internal
69} // namespace v8
70
71#endif // V8_IC_CALL_OPTIMIZATION_H_
72