RFR: 8369258: C2: enable ReassociateInvariants for all loop types [v2]

[Per Minborg]

On Mon, 13 Oct 2025 14:48:40 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> Currently ReassociateInvariants is only enabled for int counted
>> loops. I noticed, enabling it for long counted loops helps RCE. It
>> also seems like something that would help any loop. I propose enabling
>> it for all inner loops.
>
> Roland Westrelin has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
> 
>  - review
>  - Merge branch 'master' into JDK-8369258
>  - test fixes
>  - test and fix

Thanks for this one! This will improve FFM performance for many idiomatic code snippets.

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PR Comment: https://git.openjdk.org/jdk/pull/27666#issuecomment-3400311873