[Interpreter] Add support for RegExp literals.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index dc36fb1aa5f7cdf075dbd0addb6f55e3e41e1e1b..74b06ea41e6305105fdc832ff0d793518640472a 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -503,7 +503,14 @@ void BytecodeGenerator::VisitLiteral(Literal* expr) {
 
 
 void BytecodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
-  UNIMPLEMENTED();
+  // Materialize a regular expression literal.
+  TemporaryRegisterScope temporary_register_scope(builder());
+  Register flags = temporary_register_scope.NewRegister();
+  builder()
+      ->LoadLiteral(expr->flags())
+      .StoreAccumulatorInRegister(flags)
+      .LoadLiteral(expr->pattern())
+      .CreateRegExpLiteral(expr->literal_index(), flags);
 }