RFR: 8345287: C2: live in computation is broken

Mon Dec 2 12:43:37 UTC 2024

On Mon, 2 Dec 2024 12:14:47 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> > Good catch! Do you have an example where the final schedule is affected by this issue?
> 
> I don't. I noticed that live in sets are always empty while looking at memory usage of some `IndexSet`. It is puzzling that this didn't cause any performance regression. So it may be worth exploring why.

OK, thanks. I will start by running some benchmarks on x64 with and without this fix. Will report results in a couple of days.

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PR Comment: https://git.openjdk.org/jdk/pull/22473#issuecomment-2511437094