RFR: 8264104: Eliminate unnecessary vector mask conversion during VectorUnbox for floating point VectorMask [v3]

Tue Apr 13 04:16:59 UTC 2021

On Mon, 12 Apr 2021 15:09:56 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> I met the bad AD file issue when I remove the changes in AD files and overriding `Node::ideal_reg()`. I guess if a node is not used as an input of other node, this can work well? For the `VectorMaskCastNode`, it must be an input for some other nodes. If just disable the matching of this node, how does its usage find the right input code?
>
> Yeah, `ideal_reg() { return 0; }` won't work here. Sorry for the misleading suggestion.

That's ok. Thanks!

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PR: https://git.openjdk.java.net/jdk/pull/3238