Revert of [string] Migrate String.prototype.{split,replace} to TF

src/builtins/builtins-regexp.cc

 // Copyright 2016 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.
 
-#include "src/builtins/builtins-regexp.h"
-
 #include "src/builtins/builtins-constructor.h"
 #include "src/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
 #include "src/regexp/jsregexp.h"
 #include "src/regexp/regexp-utils.h"
 #include "src/string-builder.h"
 
 namespace v8 {
 namespace internal {
 
+typedef compiler::Node Node;
 typedef CodeStubAssembler::ParameterMode ParameterMode;
+typedef compiler::CodeAssemblerState CodeAssemblerState;
 
+class RegExpBuiltinsAssembler : public CodeStubAssembler {
+ public:
+  explicit RegExpBuiltinsAssembler(CodeAssemblerState* state)
+      : CodeStubAssembler(state) {}
+
+ 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);
+
+  Node* ConstructNewResultFromMatchInfo(Node* const context, Node* const regexp,
+                                        Node* const match_info,
+                                        Node* const string);
+
+  Node* RegExpPrototypeExecBodyWithoutResult(Node* const context,
+                                             Node* const regexp,
+                                             Node* const string,
+                                             Label* if_didnotmatch,
+                                             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);
+
+  Node* IsInitialRegExpMap(Node* context, Node* map);
+  void BranchIfFastRegExp(Node* context, Node* map, Label* if_isunmodified,
+                          Label* if_ismodified);
+  void BranchIfFastRegExpResult(Node* context, Node* map,
+                                Label* if_isunmodified, Label* if_ismodified);
+
+  Node* FlagsGetter(Node* const context, Node* const regexp, bool is_fastpath);
+
+  Node* FastFlagGetter(Node* const regexp, JSRegExp::Flag flag);
+  Node* SlowFlagGetter(Node* const context, Node* const regexp,
+                       JSRegExp::Flag flag);
+  Node* FlagGetter(Node* const context, Node* const regexp, JSRegExp::Flag flag,
+                   bool is_fastpath);
+  void FlagGetter(JSRegExp::Flag flag, v8::Isolate::UseCounterFeature counter,
+                  const char* method_name);
+
+  Node* IsRegExp(Node* const context, Node* const maybe_receiver);
+  Node* RegExpInitialize(Node* const context, Node* const regexp,
+                         Node* const maybe_pattern, Node* const maybe_flags);
+
+  Node* RegExpExec(Node* context, Node* regexp, Node* string);
+
+  Node* AdvanceStringIndex(Node* const string, Node* const index,
+                           Node* const is_unicode);
+
+  void RegExpPrototypeMatchBody(Node* const context, Node* const regexp,
+                                Node* const string, const bool is_fastpath);
+
+  void RegExpPrototypeSearchBodyFast(Node* const context, Node* const regexp,
+                                     Node* const string);
+  void RegExpPrototypeSearchBodySlow(Node* const context, Node* const regexp,
+                                     Node* const string);
+
+  void RegExpPrototypeSplitBody(Node* const context, Node* const regexp,
+                                Node* const string, Node* const limit);
+
+  Node* ReplaceGlobalCallableFastPath(Node* context, Node* regexp, Node* string,
+                                      Node* replace_callable);
+  Node* ReplaceSimpleStringFastPath(Node* context, Node* regexp, Node* string,
+                                    Node* replace_string);
+};
 
 // -----------------------------------------------------------------------------
 // ES6 section 21.2 RegExp Objects
 
 Node* RegExpBuiltinsAssembler::FastLoadLastIndex(Node* regexp) {
   // Load the in-object field.
   static const int field_offset =
       JSRegExp::kSize + JSRegExp::kLastIndexFieldIndex * kPointerSize;
   return LoadObjectField(regexp, field_offset);
 }
@@ skipping 2486 matching lines @@
   Bind(&if_matched);
   {
     Node* result =
         ConstructNewResultFromMatchInfo(context, regexp, match_indices, string);
     Return(result);
   }
 }
 
 }  // namespace internal
 }  // namespace v8