Home | History | Annotate | Download | only in ic 
      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<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