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Mike Stanton authored
This CL provides synchronized get/set to feedback vector slots. The FeedbackNexus is set up to use order preserving reads when used on the background thread, and a lock to ensure coherent read of information for ICKinds with two slots. The main thread takes the lock on sets. This test provides patterns to be followed by concurrent TurboFan. We don't yet access the FeedbackVector on the background thread. This CL only makes it safe to do so. The next step will come when the optimizing compiler begins to query the the vector from the background thread. Currently, with --concurrent-inlining turned on this is done in bytecode serialization on the main thread. Without concurrent inlining, it's also done on the main thread, in both cases using the FeedbackNexus. Bug: v8:7790 Change-Id: I49d8b8031190f91a0da1c24f375b6b6d8a9fe038 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2276210 Commit-Queue: Michael Stanton <mvstanton@chromium.org> Reviewed-by: Igor Sheludko <ishell@chromium.org> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#70797}
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