RFR: 8355570: [s390x] Update -march to z13 generation [v2]

Fri May 16 10:06:51 UTC 2025

On Fri, 16 May 2025 09:52:28 GMT, Lutz Schmidt <lucy at openjdk.org> wrote:

> This change enables new gcc optimizations which fully kick in only in the release build. 

locally both fastdebug + release builds are totally fine, I did build + tier1 test run and didn't see any issue. 

> do you see any performance gain?

I haven't ran any benchmarks yet, just trying to figure out the reason of build failure.

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PR Comment: https://git.openjdk.org/jdk/pull/24869#issuecomment-2886269169