RFR(S): 8245047: [PPC64] C2: ReverseBytes + Load always match to unordered Load (acquire semantics missing)

[Doerr, Martin]

Hi,

this issue was previously discussed with the preliminary synopsis "RFR(S): 8245047: PPC64 fails jcstress Unsafe (?) memory ordering tests due to C2 (?) bug":
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-May/038264.html

Bug id and webrev are still the same:
https://bugs.openjdk.java.net/browse/JDK-8245047
http://cr.openjdk.java.net/~mdoerr/8245047_ppc64_load_reversed_acquire/webrev.00/

Please send reviews replying to this RFR email.

Best regards,
Martin