VM: Simplify irregexp entry stub.

runtime/lib/regexp.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/regexp_parser.h"
@@ skipping 65 matching lines @@
       String::New("Regular expression is not initialized yet. "));
   const String& message = String::Handle(String::Concat(errmsg, pattern));
   const Array& args = Array::Handle(Array::New(1));
   args.SetAt(0, message);
   Exceptions::ThrowByType(Exceptions::kFormat, args);
   return Object::null();
 }
 
 
 DEFINE_NATIVE_ENTRY(JSSyntaxRegExp_ExecuteMatch, 3) {
+  // This function is intrinsified. See Intrinsifier::JSRegExp_ExecuteMatch.
   const JSRegExp& regexp = JSRegExp::CheckedHandle(arguments->NativeArgAt(0));
   ASSERT(!regexp.IsNull());
   GET_NON_NULL_NATIVE_ARGUMENT(String, subject, arguments->NativeArgAt(1));
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, start_index, arguments->NativeArgAt(2));
 
   if (FLAG_interpret_irregexp) {
     return BytecodeRegExpMacroAssembler::Interpret(regexp, subject, start_index,
                                                    zone);
   }
 
-  // This function is intrinsified. See Intrinsifier::JSRegExp_ExecuteMatch.
-  const intptr_t cid = subject.GetClassId();
-
-  // Retrieve the cached function.
-  const Function& fn = Function::Handle(regexp.function(cid));
-  ASSERT(!fn.IsNull());
-
-  // And finally call the generated code.
-  return IRRegExpMacroAssembler::Execute(fn, subject, start_index, zone);
+  return IRRegExpMacroAssembler::Execute(regexp, subject, start_index, zone);
 }
 
 }  // namespace dart