RFR: 8365265: x86 short forward jump exceeds 8-bit offset in methodHandles_x86.cpp when using Intel APX

[Andrew Haley]

On Tue, 12 Aug 2025 08:33:13 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> > > Looks good. This is diagnostics code, so performance is not a question.
> > > I think we generally avoid shortening branches over `__ STOP`, for example, which size is generally unpredictable. So this looks in alignment with that tactics. Maybe you want to unshorten the branch at L157 as well.
> > 
> > 
> > All thi.s long-and-short branch stuff is a pain. I wonder, given that we're now saving stubs in an archive, whether we should just bite the bullet and implement branch relaxation for stubs. I don't think it would be very hard.
> 
> Code density still matters for runtime performance, alas.

Well, yes. I'm suggesting that we should generate short branches automagically.

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PR Comment: https://git.openjdk.org/jdk/pull/26731#issuecomment-3178676758