call-optimization.h revision b8a8cc1952d61a2f3a2568848933943a543b5d3e 
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/code-stubs.h"
9#include "src/ic/access-compiler.h"
10#include "src/macro-assembler.h"
11#include "src/objects.h"
12
13namespace v8 {
14namespace internal {
15// Holds information about possible function call optimizations.
16class CallOptimization BASE_EMBEDDED {
17 public:
18  explicit CallOptimization(Handle<JSFunction> function);
19
20  bool is_constant_call() const { return !constant_function_.is_null(); }
21
22  Handle<JSFunction> constant_function() const {
23    DCHECK(is_constant_call());
24    return constant_function_;
25  }
26
27  bool is_simple_api_call() const { return is_simple_api_call_; }
28
29  Handle<FunctionTemplateInfo> expected_receiver_type() const {
30    DCHECK(is_simple_api_call());
31    return expected_receiver_type_;
32  }
33
34  Handle<CallHandlerInfo> api_call_info() const {
35    DCHECK(is_simple_api_call());
36    return api_call_info_;
37  }
38
39  enum HolderLookup { kHolderNotFound, kHolderIsReceiver, kHolderFound };
40  Handle<JSObject> LookupHolderOfExpectedType(
41      Handle<Map> receiver_map, HolderLookup* holder_lookup) const;
42
43  // Check if the api holder is between the receiver and the holder.
44  bool IsCompatibleReceiver(Handle<Object> receiver,
45                            Handle<JSObject> holder) const;
46
47 private:
48  void Initialize(Handle<JSFunction> function);
49
50  // Determines whether the given function can be called using the
51  // fast api call builtin.
52  void AnalyzePossibleApiFunction(Handle<JSFunction> function);
53
54  Handle<JSFunction> constant_function_;
55  bool is_simple_api_call_;
56  Handle<FunctionTemplateInfo> expected_receiver_type_;
57  Handle<CallHandlerInfo> api_call_info_;
58};
59}
60}  // namespace v8::internal
61
62#endif  // V8_IC_CALL_OPTIMIZATION_H_
63