RFR: 8263075: C2: simplify anti-dependence check in PhaseCFG::implicit_null_check() [v2]

Wed May 25 12:49:55 UTC 2022

On Thu, 19 May 2022 22:51:26 GMT, Brian J. Stafford <duke at openjdk.java.net> wrote:

>>> Looks good to me and tests passed. @robcasloz should also have a look.
>> 
>> Running some additional tests, will come back with the results.
>
> Thank you @robcasloz for the suggestions, hopefully I've incorporated them as you expected. Please let me know if I should make further changes.

@brianjstafford feel free to mark this PR as ready for integration (`/integrate`) when you think it is.

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PR: https://git.openjdk.java.net/jdk/pull/8684