RFR: 8329597: C2: Intrinsify Reference.clear [v3]

[Aleksey Shipilev]

On Mon, 30 Sep 2024 15:08:53 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

> I think we need a new ZBarrierSetRuntime::no_keepalive_store_barrier_on_oop_field_without_healing(oop* p) and to make that the selected slow path function when ZBarrierNoKeepalive is set on a StorePNode. Its implementation would call ZBarrier::no_keep_alive_store_barrier_on_heap_oop_field. This should do the trick.

Thanks! See new commits: is that the shape you were thinking of? Once we get AArch64 parts right, I'll copy-paste that to other arches.

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PR Comment: https://git.openjdk.org/jdk/pull/20139#issuecomment-2383669579