[8u] RFR for JDK-8134918 - C2: Type speculation produces mismatched unsafe accesses

[Shafi Ahmad]

May I get the review done for this backport.  The jtreg test on linux [amd64 ] is fine.

Regards,
Shafi

> -----Original Message-----
> From: Shafi Ahmad
> Sent: Monday, October 17, 2016 3:43 PM
> To: hotspot-dev at openjdk.java.net
> Subject: [8u] RFR for JDK-8134918 - C2: Type speculation produces
> mismatched unsafe accesses
> 
> Hi All,
> 
> Please review the backport of JDK-8134918 - C2: Type speculation produces
> mismatched unsafe accesses to jdk8u-dev.
> 
> Please note that backport is not clean and the conflict is due to:
> http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/9108fab781a4#l5.165
> 
>  Getting debug build failure because of:
> http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/9108fab781a4#l5.155
> 
> The above changes are done under bug# 'JDK-8136473: failed: no
> mismatched stores, except on raw memory: StoreB StoreI' which is not back
> ported to jdk8u and the current backport is on top of above change.
> 
>  Please note that I am not sure if there is any dependency between these
> two changesets.
> 
> open webrev: http://cr.openjdk.java.net/~shshahma/8134918/webrev.00/
> jdk9 bug link: https://bugs.openjdk.java.net/browse/JDK-8134918
> jdk9 changeset:
> http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/79dae2cd00ef
> 
> testing: Passes JPRT, jtreg not completed
> 
> Regards,
> Shafi