RFR: 8278296: Generalize long range check transformation [v3]

[Roland Westrelin]

On Tue, 25 Jan 2022 01:52:56 GMT, John R Rose <jrose at openjdk.org> wrote:

>> Roland Westrelin has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:
>> 
>>  - Merge branch 'master' into JDK-8278296
>>  - more review
>>  - review
>>  - whitespaces
>>  - test & fix
>
> I went through loopTransform thoroughly and came up with a bunch of comments and suggested changes.  Here is the diff.
> 
> [loopTransform-review-1.diff.txt](https://github.com/openjdk/jdk/files/7930234/loopTransform-review-1.diff.txt)
> 
> (Second version of diff includes incidental changes in other files.  It is not tested at all.)

@rose00 thanks for the comments. I pushed a new commit that addresses them,

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PR: https://git.openjdk.java.net/jdk/pull/6989