RFR: 8345287: C2: live in computation is broken

[Roland Westrelin]

On Mon, 9 Dec 2024 08:19:04 GMT, Roberto Castañeda Lozano <rcastanedalo at openjdk.org> wrote:

> Turning off `-XX:-OptoRegScheduling` seems to have a slight overall negative effect on Renaissance (would require a more thorough analysis to confirm) and no measurable effect on DaCapo and SPECjvm2008 except for a slight improvement (around 1%) in crypto.signverify for older Coffee Lake-B machines.

Thanks @robcasloz for the test results. I filed https://bugs.openjdk.org/browse/JDK-8345820

@robcasloz @vnkozlov @dean-long thanks for the reviews

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PR Comment: https://git.openjdk.org/jdk/pull/22473#issuecomment-2528649551
PR Comment: https://git.openjdk.org/jdk/pull/22473#issuecomment-2528654538