RFR: Mixed evacuation [v2]

[Kelvin Nilsen]

On Fri, 16 Apr 2021 15:33:25 GMT, earthling-amzn <github.com+71722661+earthling-amzn at openjdk.org> wrote:

>> src/hotspot/share/gc/shenandoah/heuristics/shenandoahHeuristics.cpp line 475:
>> 
>>> 473: 
>>> 474:   // This loop is written as while rather than for because of
>>> 475:   // suspected gcc error in translating/optimizing for-loop
>> 
>> WTF, really? Do we have any indication of this?
>
> We will remove this comment. We saw some pretty strange behavior while debugging, but it turned out to be a bug in `rr`.

Comment will be gone in next commit.

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PR: https://git.openjdk.java.net/shenandoah/pull/29