RFR: 8262355: Support for AVX-512 opmask register allocation. [v4]

Wed Mar 10 16:05:11 UTC 2021

On Fri, 5 Mar 2021 14:15:57 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> How `idealreg2regmask[Op_RegVMask]` is used when `Matcher::has_predicated_vectors() == false`?

No new register pressure threshold has been introduced for predicate registers, hence just a default initialization for targets which do not support them, since its getting used in raise/lower_pressure

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PR: https://git.openjdk.java.net/jdk/pull/2768