MinObjectAlignmentSize and its derived "constants", describe the alignment of Java objects on the heap. The value can be used to increase the alignment, to free up more least-significant-bits in object pointers, which allows for larger memory ranges for compressed oops.

One usage of LogMinObjAlignmentInBytes was introduced to Symbol::identity_hash() with JDK-8087143.

In a pull request for JDK-8266642, similar code is suggested for the ClassLoaderData.

I think we should stop using LogMinObjAlignmentInBytes for C++ objects.