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

[Shafi Ahmad]

Thanks Vladimir. 

I will create dependent  backport of 
1. https://bugs.openjdk.java.net/browse/JDK-8136473
2. https://bugs.openjdk.java.net/browse/JDK-8155781
3. https://bugs.openjdk.java.net/browse/JDK-8162101

Regards,
Shafi

> -----Original Message-----
> From: Vladimir Kozlov
> Sent: Wednesday, October 19, 2016 8:27 AM
> To: Shafi Ahmad; hotspot-dev at openjdk.java.net
> Subject: Re: [8u] RFR for JDK-8134918 - C2: Type speculation produces
> mismatched unsafe accesses
> 
> Hi Shafi,
> 
> You should also consider backporting following related fixes:
> 
> https://bugs.openjdk.java.net/browse/JDK-8155781
> https://bugs.openjdk.java.net/browse/JDK-8162101
> 
> Otherwise you may hit asserts added by 8134918 changes.
> 
> Thanks,
> Vladimir
> 
> On 10/17/16 3:12 AM, Shafi Ahmad wrote:
> > 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
> >