Recognize and optimize a.runtimeType == b.runtimeType pattern.

runtime/vm/method_recognizer.h

 // Copyright (c) 2014, 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.
 
 #ifndef VM_METHOD_RECOGNIZER_H_
 #define VM_METHOD_RECOGNIZER_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
@@ skipping 148 matching lines @@
   V(_Double, get:isNegative, Double_getIsNegative, Bool, 0x3a58ff36)           \
   V(_Double, _mulFromInteger, Double_mulFromInteger, Double, 0x330e9a36)       \
   V(_Double, .fromInteger, DoubleFromInteger, Double, 0x7ef45843)              \
   V(_List, []=, ObjectArraySetIndexed, Dynamic, 0x34d2c72c)                    \
   V(_GrowableList, .withData, GrowableArray_Allocate, GrowableObjectArray,     \
     0x25a786de)                                                                \
   V(_GrowableList, add, GrowableArray_add, Dynamic, 0x0d1358ed)                \
   V(_RegExp, _ExecuteMatch, RegExp_ExecuteMatch, Dynamic, 0x6036d7fa)          \
   V(Object, ==, ObjectEquals, Bool, 0x11662ed8)                                \
   V(Object, get:runtimeType, ObjectRuntimeType, Type, 0x00e7c26b)              \
+  V(Object, _haveSameRuntimeType, ObjectHaveSameRuntimeType, Bool, 0x72aad7e2) \
   V(_StringBase, get:hashCode, String_getHashCode, Smi, 0x78c2eb88)            \
   V(_StringBase, get:isEmpty, StringBaseIsEmpty, Bool, 0x74c21fca)             \
   V(_StringBase, _substringMatches, StringBaseSubstringMatches, Bool,          \
     0x2f851deb)                                                                \
   V(_StringBase, [], StringBaseCharAt, Dynamic, 0x2cf92c45)                    \
   V(_OneByteString, get:hashCode, OneByteString_getHashCode, Smi, 0x78c2eb88)  \
   V(_OneByteString, _substringUncheckedNative,                                 \
     OneByteString_substringUnchecked, OneByteString, 0x638c3722)               \
   V(_OneByteString, _setAt, OneByteStringSetAt, Dynamic, 0x452533ef)           \
   V(_OneByteString, _allocate, OneByteString_allocate, OneByteString,          \
@@ skipping 371 matching lines @@
 // Class that recognizes factories and returns corresponding result cid.
 class FactoryRecognizer : public AllStatic {
  public:
   // Return kDynamicCid if factory is not recognized.
   static intptr_t ResultCid(const Function& factory);
 };
 
 }  // namespace dart
 
 #endif  // VM_METHOD_RECOGNIZER_H_