RFR: 8296545: C2 Blackholes should allow load optimizations [v2]

Wed Nov 9 20:33:30 UTC 2022

On Wed, 9 Nov 2022 14:32:13 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> can probably even be Node, if I understand how should control-output-only nodes be defined

Yes, `MultiNode` is specifically for cases when a node produces multiple results. 

FTR I looked through the code base for `is_MemBar` usages and didn't spot any problematic cases, if you clear away memory input. But I'm fine with keeping it a membar.

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PR: https://git.openjdk.org/jdk/pull/11041