[compiler] Initial TurboFan code stubs for abstract relational comparison.

src/code-factory.h

Index: src/code-factory.h
diff --git a/src/code-factory.h b/src/code-factory.h
index 3d1ae06b15bfb73bc1829a6f1230920d124a76d2..6431534872152ffeb3402de7af3380e6a26928e2 100644
--- a/src/code-factory.h
+++ b/src/code-factory.h
@@ -75,6 +75,10 @@ class CodeFactory final {
   static Callable RegExpConstructResult(Isolate* isolate);
   static Callable RegExpExec(Isolate* isolate);
 
+  static Callable LessThan(Isolate* isolate);
+  static Callable LessThanOrEqual(Isolate* isolate);
+  static Callable GreaterThan(Isolate* isolate);
+  static Callable GreaterThanOrEqual(Isolate* isolate);
   static Callable StrictEqual(Isolate* isolate);
   static Callable StrictNotEqual(Isolate* isolate);