Optimize GetPrototype

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index b56e9215ab35d5d4c22b11f8eab3af9128fc6e58..8518fdca09de7944a0784099164fc6ced420ea3a 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -6179,6 +6179,10 @@ class HObjectAccess FINAL {
     return HObjectAccess(kMaps, JSObject::kMapOffset);
   }
 
+  static HObjectAccess ForPrototype() {
+    return HObjectAccess(kMaps, Map::kPrototypeOffset);
+  }
+
   static HObjectAccess ForMapAsInteger32() {
     return HObjectAccess(kMaps, JSObject::kMapOffset,
                          Representation::Integer32());