Optimizes 'as' operation in similar way as 'instanceof': collect type feedback in unoptimized mode…

runtime/vm/object.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 "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 107 matching lines @@
 
 
 const double MegamorphicCache::kLoadFactor = 0.75;
 
 
 // The following functions are marked as invisible, meaning they will be hidden
 // in the stack trace.
 // (Library, class name, method name)
 #define INVISIBLE_LIST(V)                                                      \
   V(CoreLibrary, Object, _noSuchMethod)                                        \
+  V(CoreLibrary, Object, _as)                                                  \
+  V(CoreLibrary, Object, _instanceOf)                                          \
   V(CoreLibrary, _ObjectArray, _ObjectArray.)                                  \
   V(CoreLibrary, AssertionErrorImplementation, _throwNew)                      \
   V(CoreLibrary, TypeErrorImplementation, _throwNew)                           \
   V(CoreLibrary, FallThroughErrorImplementation, _throwNew)                    \
   V(CoreLibrary, AbstractClassInstantiationErrorImplementation, _throwNew)     \
   V(CoreLibrary, NoSuchMethodError, _throwNew)                                 \
   V(CoreLibrary, int, _throwFormatException)                                   \
   V(CoreLibrary, int, _parse)                                                  \
   V(CoreLibrary, StackTrace, _setupFullStackTrace)                             \
 
@@ skipping 12909 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart