RFR: 8370220: C2: rename methods and improve documentation around get_ctrl and idom lazy updating/forwarding of ctrl and idom via dead ctrl nodes [v10]

[Emanuel Peter]

On Mon, 27 Oct 2025 10:31:42 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> Emanuel Peter 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 19 additional commits since the last revision:
>> 
>>  - Merge branch 'master' into JDK-8370220-get-ctrl-documentation
>>  - Merge branch 'JDK-8370220-get-ctrl-documentation' of https://github.com/eme64/jdk into JDK-8370220-get-ctrl-documentation
>>  - Apply suggestions from code review
>>    
>>    Co-authored-by: Christian Hagedorn <christian.hagedorn at oracle.com>
>>  - fix shenandoah replace for phis
>>  - renaming for Tobias
>>  - Apply suggestions from code review
>>    
>>    Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>
>>  - more for Christian part 3
>>  - more for Christian part 2
>>  - Apply suggestions from code review
>>    
>>    Co-authored-by: Christian Hagedorn <christian.hagedorn at oracle.com>
>>  - for Christian part 1
>>  - ... and 9 more: https://git.openjdk.org/jdk/compare/ffb48287...e4bcb769
>
> Still good!

@chhagedorn @TobiHartmann Thanks for the review / approval!
@rwestrel Thanks for approving the shanandoah changes!

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PR Comment: https://git.openjdk.org/jdk/pull/27892#issuecomment-3454862103