One instead of two runtime calls when initializing regexp.

src/runtime/runtime.h

 // Copyright 2012 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_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 137 matching lines @@
   F(MathAsin, 1, 1)                                        \
   F(MathAtan, 1, 1)                                        \
   F(MathFloorRT, 1, 1)                                     \
   F(MathAtan2, 2, 1)                                       \
   F(MathExpRT, 1, 1)                                       \
   F(RoundNumber, 1, 1)                                     \
   F(MathFround, 1, 1)                                      \
   F(RemPiO2, 1, 1)                                         \
                                                            \
   /* Regular expressions */                                \
-  F(RegExpCompile, 3, 1)                                   \
+  F(RegExpInitializeAndCompile, 3, 1)                      \
   F(RegExpExecMultiple, 4, 1)                              \
-  F(RegExpInitializeObject, 6, 1)                          \
                                                            \
   /* JSON */                                               \
   F(ParseJson, 1, 1)                                       \
   F(BasicJSONStringify, 1, 1)                              \
   F(QuoteJSONString, 1, 1)                                 \
                                                            \
   /* Strings */                                            \
   F(StringIndexOf, 3, 1)                                   \
   F(StringLastIndexOf, 3, 1)                               \
   F(StringLocaleCompare, 2, 1)                             \
@@ skipping 720 matching lines @@
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 class DeclareGlobalsStrictMode : public BitField<StrictMode, 2, 1> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_