RFR: 8347006: LoadRangeNode floats above array guard in arraycopy intrinsic [v4]

[Leonid Mesnik]

On Wed, 8 Jan 2025 12:45:48 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> OK, I was confused by this in PR body then:
>> 
>>> I was able to reliably reproduce the issue with compiler/arraycopy/TestArrayCopyNoInit.java and -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:-UseCompressedClassPointers on Linux AArch64 and verified that the fix solves the problem.
>> 
>> But fine, if it reproduces with +UCOH, let it be there.
>
> Ah, that's actually a typo, good catch. Should be `-XX:+UseCompactObjectHeaders`. I'll fix it in the description.

Cant you please add this '@run' as a separate testcase with it's own id. So it is easier to identify and exclude the failures.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/22967#discussion_r1910706521