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

[Manuel Hässig]

On Tue, 12 Aug 2025 14:54:39 GMT, Manuel Hässig <mhaessig at openjdk.org> wrote:

>> I think that is actually the very definition of a `LoopNode`: it has the entry edge on `in(1)` and the backedge on `in(2)` ;)
>
> Alright, `region` becomes a field, and `profitable` gets asserts. Thank you for the suggestions.

>  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.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26429#discussion_r2270325852