[turbofan] Introduce proper JSCreateLiteralRegExp operator.

src/compiler/ast-graph-builder.cc

 // Copyright 2014 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/compiler/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/linkage.h"
@@ skipping 1678 matching lines @@
 void AstGraphBuilder::VisitLiteral(Literal* expr) {
   Node* value = jsgraph()->Constant(expr->value());
   ast_context()->ProduceValue(value);
 }
 
 
 void AstGraphBuilder::VisitRegExpLiteral(RegExpLiteral* expr) {
   Node* closure = GetFunctionClosure();
 
   // Create node to materialize a regular expression literal.
-  Node* literal_index = jsgraph()->Constant(expr->literal_index());
-  Node* pattern = jsgraph()->Constant(expr->pattern());
-  Node* flags = jsgraph()->Constant(expr->flags());
-  const Operator* op =
-      javascript()->CallRuntime(Runtime::kCreateRegExpLiteral, 4);
-  Node* literal = NewNode(op, closure, literal_index, pattern, flags);
+  const Operator* op = javascript()->CreateLiteralRegExp(
+      expr->pattern(), expr->flags(), expr->literal_index());
+  Node* literal = NewNode(op, closure);
   PrepareFrameState(literal, expr->id(), ast_context()->GetStateCombine());
   ast_context()->ProduceValue(literal);
 }
 
 
 void AstGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
   Node* closure = GetFunctionClosure();
 
   // Create node to deep-copy the literal boilerplate.
   const Operator* op = javascript()->CreateLiteralObject(
@@ skipping 2593 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8