RFR: 8341831: PhaseCFG::insert_anti_dependences asserts with "no loads" [v4]

[Dean Long]

On Fri, 11 Oct 2024 20:38:24 GMT, Igor Veresov <iveresov at openjdk.org> wrote:

>> `CacheWB` nodes are peculiar in a sense that they both are anti-dependent and produce memory. I think it's reasonable to relax the assert in `insert_anti_dependences()` to work around their properties.
>
> Igor Veresov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address Dean's comment

Marked as reviewed by dlong (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21455#pullrequestreview-2363588573