llvm dev - Apr 2020 - [RFC] [PowerPC] Removing PowerPC QPX Support

Hi, everyone,

I would like to know if anyone is still making use of the support in the PowerPC
backend for the IBM BG/Q supercomputer, including the support for its QPX vector
instruction set. If you are, please reply. I'm not aware of any
still-running BG/Q machines, and if no one is making use of this functionality,
I propose that we remove it.

Thanks again,
Hal

Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory
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On 2020-04-29, Finkel, Hal J. via llvm-dev wrote:
>Hi, everyone,
>
>I would like to know if anyone is still making use of the support in the
PowerPC backend for the IBM BG/Q supercomputer, including the support for its
QPX vector instruction set. If you are, please reply. I'm not aware of any
still-running BG/Q machines, and if no one is making use of this functionality,
I propose that we remove it.
>
>Thanks again,
>Hal
>
>Hal Finkel
>Lead, Compiler Technology and Programming Languages
>Leadership Computing Facility
>Argonne National Laboratory
CC Justin Hibbits who may be using QPX.

(I don't know anything about QPX.)

On Thu, 30 Apr 2020 12:03:08 -0700
Fangrui Song <maskray at google.com> wrote:
> On 2020-04-29, Finkel, Hal J. via llvm-dev wrote:
> >Hi, everyone,
> >
> >I would like to know if anyone is still making use of the support in
> >the PowerPC backend for the IBM BG/Q supercomputer, including the
> >support for its QPX vector instruction set. If you are, please
> >reply. I'm not aware of any still-running BG/Q machines, and if no
> >one is making use of this functionality, I propose that we remove it.
> >
> >Thanks again,
> >Hal
> >
> >Hal Finkel
> >Lead, Compiler Technology and Programming Languages
> >Leadership Computing Facility
> >Argonne National Laboratory  
> 
> CC Justin Hibbits who may be using QPX.
> 
> (I don't know anything about QPX.)
Unfortunately, I don't own a BG/Q, or any BG.  Doubt I could afford the
power bill for one.

- Justin

Re... If no one objects, we'll take action to remove QPX support soon.
Thanks.


Best,

Jinsong Ji (纪金松), PhD.

XL/LLVM on Power Compiler Development
E-mail: jji at us.ibm.com



From:	"Finkel, Hal J. via llvm-dev" <llvm-dev at lists.llvm.org>
To:	"'llvm-dev at lists.llvm.org'" <llvm-dev at
lists.llvm.org>
Date:	04/29/2020 02:59 PM
Subject:	[EXTERNAL] [llvm-dev] [RFC] [PowerPC] Removing PowerPC QPX
            Support
Sent by:	"llvm-dev" <llvm-dev-bounces at lists.llvm.org>



Hi, everyone,

I would like to know if anyone is still making use of the support in the
PowerPC backend for the IBM BG/Q supercomputer, including the support for
its QPX vector instruction set. If you are, please reply. I'm not aware of
any still-running BG/Q machines, and if no one is making use of this
functionality, I propose that we remove it.

Thanks again,
Hal

Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory_______________________________________________
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