[jdk11u] RFR: 8304389: [11u] Crash on Windows in C2 compiled code after 8248238 and 8218431

[Dean Long]

On Fri, 17 Mar 2023 07:47:44 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

> … 8218431
> 
> A required fix to avoid regression in 11.0.19. See JBS issue.

There is probably some x64 code that is assuming Linux ABI for RSI and RDI, so it breaks when trying to use the Windows ABI.  And the _WIN64 ABI settings in x86_64.ad may be effectively dead code that was never tested because of the makefile issue that never defined _WIN64 for adlc before.

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PR Comment: https://git.openjdk.org/jdk11u/pull/70#issuecomment-1477108733