RFR: 8282045: When loop strip mining fails, safepoints are removed from loop anyway [v2]

[Roland Westrelin]

On Wed, 23 Feb 2022 09:48:58 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> 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-8282045
>>  - whitespaces
>>  - fix & test
>
> Noticed a typo in `PhaseIdealLoop::find_safepoint` that you might want to fix as well with this patch:
> `there's not side effect` -> `there's no side effect`

@TobiHartmann  thanks for looking at this. The new commit should take care of your comments.

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PR: https://git.openjdk.java.net/jdk/pull/7513