RFR: 8253183: Fragile memory barrier selection for some weak memory model platforms [v2]

[Martin Doerr]

> Hi, I'd like to propose a fix after the discussion in https://bugs.openjdk.java.net/browse/JDK-8253183
> 
> Please especially review my new comments in the code. The authors of the surrounding code in objectMonitor.cpp and
> synchronizer.cpp may know better.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  rename loadload_for_iriw to loadload_for_IRIW

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/387/files
  - new: https://git.openjdk.java.net/jdk/pull/387/files/cd1cc97b..cc7e9c6d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=387&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=387&range=00-01

  Stats: 6 lines in 4 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/387.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/387/head:pull/387

PR: https://git.openjdk.java.net/jdk/pull/387