[LLVMdev] Help needed on debugging llvm

[Anitha B Gollamudi]

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