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

[Sandhya Viswanathan]

On Tue, 9 Jan 2024 18:03:40 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> @vnkozlov @jatin-bhateja Your review comments are addressed, please take a look.
>
> @sviswa7 but is the "same address" not an indication of a missing ideal transformation? Hence, the assert may actually be ok, and the root cause be fixed in the ideal transformation. I think this maybe what @jatin-bhateja was suggesting.

@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.

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PR Comment: https://git.openjdk.org/jdk/pull/17315#issuecomment-1883549079