[jdk26] RFR: 8360271: String.indexOf intrinsics fail with +EnableX86ECoreOpts and -CompactStrings

[Sandhya Viswanathan]

On Fri, 16 Jan 2026 07:08:06 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [1d889b92](https://github.com/openjdk/jdk/commit/1d889b92bde5dfcb1fbe6cddb389a77f92eb1ce7) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Volodymyr Paprotski on 15 Jan 2026 and was reviewed by Tobias Hartmann, Jatin Bhateja and Sandhya Viswanathan.
> 
> Thanks!

Marked as reviewed by sviswanathan (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29263#pullrequestreview-3671578823