RFR: 8321712: C2: "failed: Multiple uses of register" in C2_MacroAssembler::vminmax_fp [v2]

[Sandhya Viswanathan]

On Tue, 9 Jan 2024 18:14:55 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> @eme64 Probably, but my goal here is limited. We have to fix this PR within RDP2 i.e. asap. That is why I kept the changes to minimum. On Vladimir's request I have added a minimum change to handle the case when a and b are same.
>
> @sviswa7 Ok, I understand. But a regression test would still be good. We should just reduce the regression test attached to https://bugs.openjdk.org/browse/JDK-8322090, @TobiHartmann mentioned it on JIRA.
> 
> I guess we can also file a follow up RFE to improve the Ideal transformations.

@eme64 No, I don't have a regression test for this. I followed the ctw.sh mechanism provided in the bug report by Roland Westrelin to reproduce and verify.

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PR Comment: https://git.openjdk.org/jdk/pull/17315#issuecomment-1883554360