Merged this week into the LLVM compiler codebase is initial support for “arch15” within the SystemZ back-end. Arch15 likely correlates to the IBM z17 mainframes with Telum II processors.
Arch14 was for IBM z16 and now Arch15 support is…
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https://www.phoronix.com/news/LLVM-SystemZ-arch15-IBM-z17