[Interpreter] Use FastCloneRegExpStub for CreateRegExpLiteral.

src/interpreter/interpreter.cc

 // Copyright 2015 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/interpreter/interpreter.h"
 
 #include "src/ast/prettyprinter.h"
 #include "src/code-factory.h"
 #include "src/compiler.h"
 #include "src/factory.h"
@@ skipping 1555 matching lines @@
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
 // CreateRegExpLiteral <pattern_idx> <literal_idx> <flags>
 //
 // Creates a regular expression literal for literal index <literal_idx> with
 // <flags> and the pattern in <pattern_idx>.
 void Interpreter::DoCreateRegExpLiteral(InterpreterAssembler* assembler) {
-  DoCreateLiteral(Runtime::kCreateRegExpLiteral, assembler);
+  Callable callable = CodeFactory::FastCloneRegExp(isolate_);
+  Node* target = __ HeapConstant(callable.code());
+  Node* index = __ BytecodeOperandIdx(0);
+  Node* pattern = __ LoadConstantPoolEntry(index);
+  Node* literal_index_raw = __ BytecodeOperandIdx(1);
+  Node* literal_index = __ SmiTag(literal_index_raw);
+  Node* flags_raw = __ BytecodeOperandImm(2);
+  Node* flags = __ SmiTag(flags_raw);
+  Node* closure = __ LoadRegister(Register::function_closure());
+  Node* context = __ GetContext();
+  Node* result = __ CallStub(callable.descriptor(), target, context, closure,
+                             literal_index, pattern, flags);
+  __ SetAccumulator(result);
+  __ Dispatch();
 }
 
 
 // CreateRegExpLiteralWide <pattern_idx> <literal_idx> <flags>
 //
 // Creates a regular expression literal for literal index <literal_idx> with
 // <flags> and the pattern in <pattern_idx>.
 void Interpreter::DoCreateRegExpLiteralWide(InterpreterAssembler* assembler) {
-  DoCreateLiteral(Runtime::kCreateRegExpLiteral, assembler);
+  DoCreateRegExpLiteral(assembler);
 }
 
 
 // CreateArrayLiteral <element_idx> <literal_idx> <flags>
 //
 // Creates an array literal for literal index <literal_idx> with flags <flags>
 // and constant elements in <element_idx>.
 void Interpreter::DoCreateArrayLiteral(InterpreterAssembler* assembler) {
   DoCreateLiteral(Runtime::kCreateArrayLiteral, assembler);
 }
@@ skipping 241 matching lines @@
   Node* index = __ LoadRegister(index_reg);
   Node* one = __ SmiConstant(Smi::FromInt(1));
   Node* result = __ SmiAdd(index, one);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8