RFR: 8294033: x86_64: libm stubs are missing

Fri Nov 11 22:51:28 UTC 2022

On Fri, 11 Nov 2022 02:07:22 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> There's a regression from [JDK-8293285](https://bugs.openjdk.org/browse/JDK-8293285) refactoring where I forgot to call generate_libm_stubs() during stub initialization phase.
> 
> The patch restores proper stub init sequence and also piles some minor refactorings on top. 
> 
> Testing: hs-tier1 - hs-tier2
> 
> Thanks!

Thanks for the reviews, Jorn and Vladimir.

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PR: https://git.openjdk.org/jdk/pull/11100