[Llvm-bgq-discuss] Patches for r176829-20130309 (the current vesta version)

[Hal Finkel]

----- Original Message -----
> From: "Jeff Hammond" <jhammond at alcf.anl.gov>
> To: reply at meinersbur.de
> Cc: "Hal Finkel" <hfinkel at anl.gov>, llvm-bgq-discuss at lists.alcf.anl.gov
> Sent: Wednesday, April 17, 2013 12:27:52 PM
> Subject: Re: [Llvm-bgq-discuss] Patches for r176829-20130309 (the current vesta version)
> 
> Is the inlining problem related to
> http://clang.llvm.org/compatibility.html#inline?

Yes, that's correct. Maybe we should turn on the gnu-style inline interpretation in the header file? FWIW, never versions of the glibc headers have fixed this issue, so our problem really is just that we have older system headers. Nevertheless, we should probably make this as easy as possible for the users.

 -Hal

> 
> Jeff
> 
> On Wed, Apr 17, 2013 at 12:22 PM, Michael Kruse
> <llvm-bgq-discuss at meinersbur.de> wrote:
> > Hi,
> >
> > originally I intended to send the following as part of a collection
> > with more problems I found and you might be interested in. But
> > because
> > I do not have time at the moment for closer investigation, I just
> > send
> > it now and will send the other problems sometime later. Please
> > excuse
> > the premature style.
> >
> >
> >
> > 1. I found two cases where bgclang segfaults on code that works
> > fine
> > with xlc (see added files).
> > The first is some inline asm, but I don't know whether inline asm
> > is
> > supposed to work in clang.
> > The second uses IBM-style builtins.
> >
> >
> > 2. bgclang is quite unreliable on inline assemble. With this:
> > asm (
> >             "dcbt       0,%[ptr]  \n"
> >             "dcbt  %[c64],%[ptr]  \n"
> >             "dcbt %[c128],%[ptr]  \n"
> >             "dcbt %[c192],%[ptr]  \n"
> >             "dcbt %[c256],%[ptr]  \n"
> >             "dcbt %[c320],%[ptr]  \n"
> >             : :
> >                 [ptr] "+r" (ptr),
> >               [c64]  "b" (64),
> >               [c128] "b" (128),
> >               [c192] "b" (192),
> >               [c256] "b" (256),
> >               [c320] "b" (320)
> >         );
> >
> > I sometimes get
> > error: invalid input constraint '+r' in asm
> > other times
> > fatal error: error in backend: Do not know how to split the result
> > of
> > this operator!
> > (though I am not sure it's this piece of code, clang doesn't give
> > me a location)
> >
> >
> > 3. There is some issue with the inline functions. The IBM header
> > files
> > seem to assume -fgnu89-inline (with -std=c99), otherwise I get
> > multiple definitions errors from the linker. I don't really
> > understand, because the IBM-supported gcc compiler shouldn't have
> > this
> > problem either.
> >
> >
> > 4. The unimplemented-errors using _Complex data type and compound
> > expressions ("+=") are inherited from clang?
> >
> >
> > Michael
> >
> > 2013/3/30 Hal Finkel <hfinkel at anl.gov>:
> >> Hello everyone,
> >>
> >> I've attached the patches for the currently-installed version on
> >> vesta (r176829-20130309). These apply to upstream revision
> >> r176829. This is the first released version to contain QPX
> >> autovectorization for single-precision values (in addition to
> >> many other improvements). I've also included the bgclang wrapper
> >> script and the libc++ build script (and the llvm build script and
> >> the exception_ptr.h wrapper header).
> >>
> >> Another user-visible change to mention: You no longer need to
> >> explicitly include the qpxintrin.h header to use the IBM-style
> >> QPX intrinsics. This header is now automatically included for
> >> you.
> >>
> >> For any of you doing first-time on-your-own installs (or anyone
> >> else), please feel free to ask questions about how all of this
> >> needs to be setup in practice.
> >>
> >> Sincerely,
> >> Hal
> >>
> >> --
> >> Hal Finkel
> >> Postdoctoral Appointee
> >> Leadership Computing Facility
> >> Argonne National Laboratory
> >>
> >> _______________________________________________
> >> llvm-bgq-discuss mailing list
> >> llvm-bgq-discuss at lists.alcf.anl.gov
> >> https://lists.alcf.anl.gov/mailman/listinfo/llvm-bgq-discuss
> >>
> >
> > _______________________________________________
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> > llvm-bgq-discuss at lists.alcf.anl.gov
> > https://lists.alcf.anl.gov/mailman/listinfo/llvm-bgq-discuss
> >
> 
> 
> 
> --
> Jeff Hammond
> Argonne Leadership Computing Facility
> University of Chicago Computation Institute
> jhammond at alcf.anl.gov / (630) 252-5381
> http://www.linkedin.com/in/jeffhammond
> https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond
> ALCF docs: http://www.alcf.anl.gov/user-guides
>