RFR: 8346280: C2: implement late barrier elision for G1 [v4]

[Roberto Castañeda Lozano]

On Wed, 5 Feb 2025 15:06:39 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> LGTM. TestG1BarrierGeneration.java has passed on ppc64le. I'll run more tests. Please remember updating the Copyright headers.

Thanks for the reminder, updated in commit 3671f474.

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PR Comment: https://git.openjdk.org/jdk/pull/23235#issuecomment-2639197888