[stubs] Add RegExpReplace and RegExpSplit stubs

src/builtins/builtins-regexp.h

 // Copyright 2017 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_REGEXP_H_
 #define V8_BUILTINS_BUILTINS_REGEXP_H_
 
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 typedef compiler::Node Node;
 typedef compiler::CodeAssemblerState CodeAssemblerState;
 typedef compiler::CodeAssemblerLabel CodeAssemblerLabel;
 
 class RegExpBuiltinsAssembler : public CodeStubAssembler {
  public:
   explicit RegExpBuiltinsAssembler(CodeAssemblerState* state)
       : CodeStubAssembler(state) {}
 
-  void BranchIfFastRegExp(Node* context, Node* map, Label* if_isunmodified,
-                          Label* if_ismodified);
+  Node* IsFastRegExpMap(Node* context, Node* map);
 
  protected:
   Node* FastLoadLastIndex(Node* regexp);
   Node* SlowLoadLastIndex(Node* context, Node* regexp);
   Node* LoadLastIndex(Node* context, Node* regexp, bool is_fastpath);
 
   void FastStoreLastIndex(Node* regexp, Node* value);
   void SlowStoreLastIndex(Node* context, Node* regexp, Node* value);
   void StoreLastIndex(Node* context, Node* regexp, Node* value,
                       bool is_fastpath);
@@ skipping 51 matching lines @@
   Node* ReplaceGlobalCallableFastPath(Node* context, Node* regexp, Node* string,
                                       Node* replace_callable);
   Node* ReplaceSimpleStringFastPath(Node* context, Node* regexp, Node* string,
                                     Node* replace_string);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_REGEXP_H_