RFR: 8354300: Mark String.hash field @Stable [v2]

[Chen Liang]

On Tue, 22 Apr 2025 08:47:39 GMT, Hannes Greule <hgreule at openjdk.org> wrote:

> Would it make sense to have IR tests for this?

We actually need a set of IR tests for core library APIs that are extremely performance sensitive with constant folding.

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PR Comment: https://git.openjdk.org/jdk/pull/24625#issuecomment-2821621465