git: openjdk/jdk17u-dev: 8325372: Shenandoah: SIGSEGV crash in unnecessary_acquire due to LoadStore split through phi

[Paul Hohensee]

Changeset: 5b8a2e55
Author:    Dan Lutker <dlutker at openjdk.org>
Committer: Paul Hohensee <phh at openjdk.org>
Date:      2024-03-19 20:35:54 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/5b8a2e55660fe3fa8c42d2b4601f8c61a16b2763

8325372: Shenandoah: SIGSEGV crash in unnecessary_acquire due to LoadStore split through phi

Backport-of: 5d414da50459b7a1e6f0f537ff3b318854b2c427

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