RFR: 8356176: C2 MemorySegment: missing RCE with byteSize() in Loop Exit Check inside the for Expression [v3]

[Quan Anh Mai]

On Tue, 12 Aug 2025 15:59:55 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>>>  if the region is a Loop, then we should have _total_wins = _loop_entry_wins + _loop_back_wins, correct?
>> 
>> Actually, this might not be true, because there is a codepath that resets the win count when a load is moved from an outer to an inner loop.
>
> Hmm ok. That complicates things for sure.
> Do you feel you like you understand the implication on all cases here then?

But should the invariant still hold after the reset? `0 + 0 == 0` after all?

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PR Review Comment: https://git.openjdk.org/jdk/pull/26429#discussion_r2270513456