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 13 namespace v8 { 14 namespace internal { 15 // Holds information about possible function call optimizations. 16 class CallOptimization BASE_EMBEDDED { 17 public: 18 explicit CallOptimization(Handle<Object> function); 19 is_constant_call()20 bool is_constant_call() const { return !constant_function_.is_null(); } 21 constant_function()22 Handle<JSFunction> constant_function() const { 23 DCHECK(is_constant_call()); 24 return constant_function_; 25 } 26 is_simple_api_call()27 bool is_simple_api_call() const { return is_simple_api_call_; } 28 expected_receiver_type()29 Handle<FunctionTemplateInfo> expected_receiver_type() const { 30 DCHECK(is_simple_api_call()); 31 return expected_receiver_type_; 32 } 33 api_call_info()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, 42 int* holder_depth_in_prototype_chain = NULL) const; 43 44 // Check if the api holder is between the receiver and the holder. 45 bool IsCompatibleReceiver(Handle<Object> receiver, 46 Handle<JSObject> holder) const; 47 48 // Check if the api holder is between the receiver and the holder. 49 bool IsCompatibleReceiverMap(Handle<Map> receiver_map, 50 Handle<JSObject> holder) const; 51 52 private: 53 void Initialize(Handle<JSFunction> function); 54 void Initialize(Handle<FunctionTemplateInfo> function_template_info); 55 56 // Determines whether the given function can be called using the 57 // fast api call builtin. 58 void AnalyzePossibleApiFunction(Handle<JSFunction> function); 59 60 Handle<JSFunction> constant_function_; 61 bool is_simple_api_call_; 62 Handle<FunctionTemplateInfo> expected_receiver_type_; 63 Handle<CallHandlerInfo> api_call_info_; 64 }; 65 } // namespace internal 66 } // namespace v8 67 68 #endif // V8_IC_CALL_OPTIMIZATION_H_ 69