RFR: 8310264: In PhaseChaitin::Split defs and phis are leaked [v5]

[Tobias Hartmann]

On Wed, 28 Jun 2023 12:26:18 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> Hi,
>> 
>> `defs` and `phis` are leaked as they are resource allocated but not protected by a `ResourceMark`. The intention might have been for these to also live in the `split_arena`.. This change is the most conservative one, however, and does fix the memory leak.
>> 
>> Please consider, thanks.
>> 
>> Johan
>
> Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert to list init

Looks good to me too.

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Marked as reviewed by thartmann (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14530#pullrequestreview-1503215193