[Llvm-bgq-discuss] bgclang r180241-20130423 on vesta/mira

[Hal Finkel]

Patches, build and wrapper scripts attached.

 -Hal

----- Original Message -----
> From: "Hal Finkel" <hfinkel at anl.gov>
> To: llvm-bgq-discuss at lists.alcf.anl.gov
> Sent: Wednesday, April 24, 2013 10:50:00 PM
> Subject: [Llvm-bgq-discuss] bgclang r180241-20130423 on vesta/mira
> 
> Hi everyone,
> 
> I've installed a new version on vesta/mira (r180241-20130423). This
> version picks up the last 1.5 months of performance work I've done
> on the PowerPC backend, as well as a few QPX-specific improvements.
> Notably, there are a number of fast-math-specific improvements
> (including autovectorization of division and sqrt), and so if you
> can afford some error in the last bit or two, try compiling with
> -ffast-math and see if that helps.
> 
> xlC enables its fast-math mode by default at -O3 (unless you
> specifically specify -qstrict), but that's cheating ;) That having
> been said, this is a user facility, so if you all would like, we can
> cheat too.
> 
> This new version of bgclang also supports (from upstream) -Ofast,
> which is a combination of -O3, -ffast-math and -fstrict-aliasing.
> 
> I'll send out updated patches in the near future.
> 
>  -Hal
> 
> --
> Hal Finkel
> Postdoctoral Appointee
> Leadership Computing Facility
> Argonne National Laboratory
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> llvm-bgq-discuss at lists.alcf.anl.gov
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> 
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