[jdk17u-dev] RFR: 8285301: C2: assert(!requires_atomic_access) failed: can't ensure atomicity [v2]

[Goetz Lindenmaier]

> I backport this for parity with 17.0.5-oracle.
> 
> I had to do some simple resolves in barrierSetC2.cpp

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  Add test I missed before

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/454/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/454/files/14884996..76c6a3b7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=454&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=454&range=00-01

  Stats: 40 lines in 1 file changed: 40 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/454.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/454/head:pull/454

PR: https://git.openjdk.org/jdk17u-dev/pull/454