[regexp] Add slow exec stub to reduce code size

src/builtins/builtins.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/globals.h"
 
@@ skipping 680 matching lines @@
   CPP(ReflectGetOwnPropertyDescriptor)                                         \
   CPP(ReflectGetPrototypeOf)                                                   \
   CPP(ReflectHas)                                                              \
   CPP(ReflectIsExtensible)                                                     \
   CPP(ReflectOwnKeys)                                                          \
   CPP(ReflectPreventExtensions)                                                \
   CPP(ReflectSet)                                                              \
   CPP(ReflectSetPrototypeOf)                                                   \
                                                                                \
   /* RegExp */                                                                 \
+  TFS(RegExpPrototypeExecSlow, BUILTIN, kNoExtraICState,                       \
+      RegExpPrototypeExecSlow, 1)                                              \
   CPP(RegExpCapture1Getter)                                                    \
   CPP(RegExpCapture2Getter)                                                    \
   CPP(RegExpCapture3Getter)                                                    \
   CPP(RegExpCapture4Getter)                                                    \
   CPP(RegExpCapture5Getter)                                                    \
   CPP(RegExpCapture6Getter)                                                    \
   CPP(RegExpCapture7Getter)                                                    \
   CPP(RegExpCapture8Getter)                                                    \
   CPP(RegExpCapture9Getter)                                                    \
   TFJ(RegExpConstructor, 2)                                                    \
@@ skipping 326 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_