[LLVMdev] Problem with PTX assembly printing (NVPTX backend)

[nkavv at physics.auth.gr]

Hi ankur

thanks for the heads-up.

Best regards
Nikolaos Kavvadias
Quoting ankur deshwal <a.s.deshwal at gmail.com>:

> Hi Nikolaos,
>
> Following commands work great for me.
> $ clang -S -emit-llvm -target nvptx -x cl -include clc/clctypes.h
> ../data-types/scalar.cl
> $ llc -mcpu=sm_30 scalar.s
>
> You can follow Justin's blog [1]. It helped me a lot to understand where to
> start.
>
> [1] http://jholewinski.org/blog/llvm-3-0-ptx-backend/
>
> Best,
> Ankur
>
>
> On Mon, Feb 4, 2013 at 11:40 PM, Justin Holewinski <
> justin.holewinski at gmail.com> wrote:
>
>> On Mon, Feb 4, 2013 at 1:09 PM, <nkavv at physics.auth.gr> wrote:
>>
>>> Hi Justin,
>>>
>>>
>>>  Has anyone had similar problems with the NVPTX backend? Shouldn't this
>>>>> code be linked to the AsmPrinter library for NVPTX (already)?
>>>>>
>>>>
>>>> What do you mean by "doesn't work"?  The AsmPrinter library really houses
>>>> the MCInst printer, which isn't implemented for NVPTX yet.  The older
>>>> assembly printer works just fine.  This is transparent to users.  The
>>>> NVPTX
>>>> target can be used just like MIPS and X86 with llc (and library users).
>>>>
>>>> Is llc saying nvptx is an invalid target?  If so, you probably built LLVM
>>>> without NVPTX.
>>>>
>>>
>>> I've used -enable-targets=all, and all libLLVMNVPTX*.a libs were
>>> produced. However, the AsmPrinter one looks dummy.
>>>
>>> Further, nvptx appears as a registered target when running llc --version.
>>>
>>> llc doesn't complain, but just "runs" forever with apparently no output
>>
>>
>> Can you post the llc command line you're using?  Can you post an LLVM IR
>> file that causes this behavior?
>>
>>
>>>
>>>
>>>  BTW I've built LLVM with mingw (strange mixture of gcc-3.4.5 and
>>>>> g++-4.6.1). Native compilation, MIPS backend and other things that i've
>>>>> tested, all work properly.
>>>>>
>>>>
>>>> Perhaps this "strange mixture" is causing some symbol errors somewhere.
>>>> Can you post the exact sequence of steps you used to build LLVM, along
>>>> with
>>>> the llc command-line that fails for you?
>>>>
>>>
>>> My configuration options were:
>>>
>>> --prefix=/my/local/path/or/so --enable-shared --enable-targets=all
>>> --enable-optimized --disable-libffi --disable-debug-runtime
>>> --disable-assertions --disable-expensive-checks
>>>
>>> Following configuration i did the typical make and make install (to a
>>> selected path by --prefix.
>>>
>>>
>>> Best regards
>>> Nikolaos Kavvadias
>>>
>>>
>>>
>>>>
>>>>
>>>>> Any help is appreciated.
>>>>>
>>>>> Best regards,
>>>>> Nikolaos Kavvadias
>>>>>
>>>>>
>>>>>
>>>>> ______________________________****_________________
>>>>>
>>>>> LLVM Developers mailing list
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>>>>> >
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Thanks,
>>>>
>>>> Justin Holewinski
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>> --
>>
>> Thanks,
>>
>> Justin Holewinski
>>
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>