[LLVMdev] Help needed on debugging llvm

[Craig Topper]

Can you send the binaries compiled with and without the integrated
assembler. Maybe I can figure out the encoding problem. I've been
unsuccessful figuring it out myself so far.

On Tue, Mar 12, 2013 at 12:34 AM, Anitha B Gollamudi <
anitha.boyapati at gmail.com> wrote:

> On 12 March 2013 09:51, Craig Topper <craig.topper at gmail.com> wrote:
> > I'm still slightly confused. Is the error now fixed or is there still a
> bug
> > in LLVM's integrated assembler?
> >
>
> The error is not fixed yet (even with fix mentioned in PR15040
> http://llvm.org/bugs/show_bug.cgi?id=15040#c4)
>
> With the updated trunk, clang still gives an error when FMA4 is
> enabled but does fine when -no-integrated-as is used. So that's a bug
> with LLVM's integrated assembler.
>
> On a related note,  r173176 mentioned in
> http://llvm.org/bugs/show_bug.cgi?id=15282  does not fix the gromacs
> miscompare error either. However -no-integrated-as helps in all cases.
>
> I am not sure if  r173176 is incomplete or the issue is something else.
>
>
>
> -Anitha
>
>
> >
> > On Mon, Mar 11, 2013 at 4:49 AM, Anitha B Gollamudi
> > <anitha.boyapati at gmail.com> wrote:
> >>
> >> On 11 March 2013 17:00, Duncan Sands <baldrick at free.fr> wrote:
> >> > Hi Anitha,
> >> >
> >> >
> >> >> Ah, I am taking back my above words w.r.t encoding. -no-integrated-as
> >> >> does fix the issue! This definitely points towards FMA4 encoding in
> >> >> clang's integrated assembler. This fits into the analysis as well -
> >> >> dragonegg *might not* be using integrated assembler at all.
> >> >
> >> >
> >> > you are right, dragonegg does not use the integrated assembler.
> >>
> >> Thanks for the confirmation Duncan. The bug turned out to be a hard
> >> nut. I have taken assembler for granted.
> >>
> >> -Anitha
> >
> >
> >
> >
> > --
> > ~Craig
>
>
>
> --
>  Anitha
>



-- 
~Craig
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