RFR: 8309751: Duplicate constant pool entries added during default method processing [v2]

[Coleen Phillimore]

On Mon, 8 Apr 2024 06:57:32 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> https://bugs.openjdk.org/browse/JDK-8329818 - HotSpot Style Guide should explicitly permit the "union trick"
>
> Thanks @kimbarrett . I didn't recognise this code as "the union trick" as such, but it is - we use the `value` member to access the bit pattern of the real (primitive) value for hashing purposes. Certainly should be safe/harmless for the types involved.

It's used for hashing and for equals comparison.  I wouldn't want to change one without the other.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18548#discussion_r1555927968