[regexp] Avoid side effects between map load and fast path check

src/builtins/builtins-regexp-gen.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 {
@@ skipping 41 matching lines @@
                                              const bool is_fastpath);
   Node* RegExpPrototypeExecBody(Node* const context, Node* const regexp,
                                 Node* const string, const bool is_fastpath);
 
   Node* ThrowIfNotJSReceiver(Node* context, Node* maybe_receiver,
                              MessageTemplate::Template msg_template,
                              char const* method_name);
 
   // Analogous to BranchIfFastRegExp, for use in asserts.
   Node* IsFastRegExp(Node* const context, Node* const object);
-  Node* IsFastRegExp(Node* const context, Node* const object, Node* const map);
 
   // Performs fast path checks on the given object itself, but omits prototype
   // checks.
   Node* IsFastRegExpNoPrototype(Node* const context, Node* const object,
                                 Node* const map);
 
   void BranchIfFastRegExpResult(Node* context, Node* map,
                                 Label* if_isunmodified, Label* if_ismodified);
 
   Node* FlagsGetter(Node* const context, Node* const regexp, bool is_fastpath);
@@ skipping 32 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_