git: openjdk/jdk21u-dev: master: 8358334: C2/Shenandoah: incorrect execution with Unsafe

[Roland Westrelin]

Changeset: 23069e91
Branch: master
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-07-17 07:30:23 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/23069e9163c4d416aa9861bc0c7beb37a71dbfa7

8358334: C2/Shenandoah: incorrect execution with Unsafe

Reviewed-by: shade, wkemper
Backport-of: 46cfc1e1940ff6b91c4f0cb0a9161fd0aef37c38

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp
! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.hpp
+ test/hotspot/jtreg/gc/shenandoah/compiler/TestLostAntiDependencyAtExpansion.java