VM: Optimize RegExp.matchAsPrefix(...) by generating a sticky RegExp specialization.

runtime/vm/bootstrap_natives.h

 // 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.
 
 #ifndef RUNTIME_VM_BOOTSTRAP_NATIVES_H_
 #define RUNTIME_VM_BOOTSTRAP_NATIVES_H_
 
 #include "vm/native_entry.h"
 
 // bootstrap dart natives used in the core dart library.
@@ skipping 94 matching lines @@
   V(Double_toStringAsFixed, 2)                                                 \
   V(Double_toStringAsExponential, 2)                                           \
   V(Double_toStringAsPrecision, 2)                                             \
   V(Double_flipSignBit, 1)                                                     \
   V(RegExp_factory, 4)                                                         \
   V(RegExp_getPattern, 1)                                                      \
   V(RegExp_getIsMultiLine, 1)                                                  \
   V(RegExp_getIsCaseSensitive, 1)                                              \
   V(RegExp_getGroupCount, 1)                                                   \
   V(RegExp_ExecuteMatch, 3)                                                    \
+  V(RegExp_ExecuteMatchSticky, 3)                                              \
   V(List_allocate, 2)                                                          \
   V(List_getIndexed, 2)                                                        \
   V(List_setIndexed, 3)                                                        \
   V(List_getLength, 1)                                                         \
   V(List_slice, 4)                                                             \
   V(ImmutableList_from, 4)                                                     \
   V(StringBase_createFromCodePoints, 3)                                        \
   V(StringBase_substringUnchecked, 3)                                          \
   V(StringBase_joinReplaceAllResult, 4)                                        \
   V(StringBuffer_createStringFromUint16Array, 3)                               \
@@ skipping 301 matching lines @@
 #ifndef PRODUCT
   MIRRORS_BOOTSTRAP_NATIVE_LIST(DECLARE_BOOTSTRAP_NATIVE)
 #endif
 
 #undef DECLARE_BOOTSTRAP_NATIVE
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_BOOTSTRAP_NATIVES_H_