[turbofan] Introduce proper JSCreateLiteralRegExp operator.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index cb9073afb531dc59e1bbcc11019e36b3ed2de1ee..cecdea3b4f41a5b171d144db48906fb57fd27272 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1233,7 +1233,7 @@ Type* Typer::Visitor::TypeJSCreateClosure(Node* node) {
 
 
 Type* Typer::Visitor::TypeJSCreateLiteralArray(Node* node) {
-  return Type::None(), Type::OtherObject();
+  return Type::OtherObject();
 }
 
 
@@ -1242,6 +1242,11 @@ Type* Typer::Visitor::TypeJSCreateLiteralObject(Node* node) {
 }
 
 
+Type* Typer::Visitor::TypeJSCreateLiteralRegExp(Node* node) {
+  return Type::OtherObject();
+}
+
+
 Type* Typer::Visitor::JSLoadPropertyTyper(Type* object, Type* name, Typer* t) {
   // TODO(rossberg): Use range types and sized array types to filter undefined.
   if (object->IsArray() && name->Is(Type::Integral32())) {