[aarch64-port-dev ] Proposed patch for C2 volatile generation (resent)

[Andrew Haley]

To run jcstress with the correct WhiteBox libs:

cd /local/aarch64/dev/test/

find . -name *.java | xargs javac

/local/aarch64/dev/build/linux-aarch64-normal-server-release/jdk/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-RestrictContended -Xbootclasspath/a:/local/aarch64/dev/test/lib/:tests-all/target/jcstress.jar -jar tests-all/target/jcstress.jar

Andrew.