RFR: 8313438: [s390x] build broken after JDK-8301996 [v2]

[Martin Doerr]

On Fri, 6 Oct 2023 11:24:58 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> Martin, Are you referring to the fix for preserving `flag` register value till the end ?
>
> If you want that this case to be handled in separate PR, then I'll file a JBS issue.

I need an explanation why this code was changed this way. If it is required for this PR, please explain in comments. If it's a separate issue, please handle separately.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15885#discussion_r1348652687