[jdk21u] Integrated: 8313248: C2: setScopedValueCache intrinsic exposes nullptr pre-values to store barriers

[Aleksey Shipilev]

On Wed, 9 Aug 2023 10:51:18 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to fix Loom bug reproducing at least with Shenandoah, but also maybe with G1.
> 
> Additional testing:
>  - [x] macos-aarch64-server-fastdebug, original reproducer fails without the patch, passes with it

This pull request has now been integrated.

Changeset: f67c2418
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk21u/commit/f67c241842097f54e1b798ceb6fbbe219530e940
Stats:     22 lines in 2 files changed: 10 ins; 8 del; 4 mod

8313248: C2: setScopedValueCache intrinsic exposes nullptr pre-values to store barriers

Backport-of: e8a37b90db8dca4dc3653970b2d66d2faf8ef452

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PR: https://git.openjdk.org/jdk21u/pull/50