Optimize non-mutation Map and Set operations for String keys

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 3e16f97bd945b0304d07be2fd7a922e68a9d86d4..0db92a8bd8f086acb69633302cb191d17b7d3179 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -6351,6 +6351,23 @@ class HObjectAccess FINAL {
     return HObjectAccess(kInobject, GlobalObject::kNativeContextOffset);
   }
 
+  static HObjectAccess ForJSCollectionTable() {
+    return HObjectAccess::ForObservableJSObjectOffset(
+        JSCollection::kTableOffset);
+  }
+
+  template <typename CollectionType>
+  static HObjectAccess ForOrderedHashTableNumberOfBuckets() {
+    return HObjectAccess(kInobject, CollectionType::kNumberOfBucketsOffset,
+                         Representation::Smi());
+  }
+
+  template <typename CollectionType>
+  static HObjectAccess ForOrderedHashTableNumberOfElements() {
+    return HObjectAccess(kInobject, CollectionType::kNumberOfElementsOffset,
+                         Representation::Smi());
+  }
+
   inline bool Equals(HObjectAccess that) const {
     return value_ == that.value_;  // portion and offset must match
   }