[LLVMdev] UNREACHABLE executed! error while trying to generate PTX

[Justin Holewinski]

Not really.  Clang does not have a way to annotate device vs. kernel
functions in C/C++ mode.  You're probably better off trying to use OpenCL
or CUDA mode in clang.

In the clang unit tests, there is a cuda.h header that provides very basic
support for these keywords:  tests/SemaCUDA/cuda.h

If you compile as CUDA (use .cu extension, or "-x cuda") and use this
header, you will have basic support.  You can invoke clang with something
like:

$ clang test1.cu -Xclang -fcuda-is-device -I ../src/clang/test/SemaCUDA
-Xclang -triple -Xclang nvptx64 -Xclang -target-cpu -Xclang sm_20 -S

... assuming your clang source directory is ../src/clang, you want 64-bit
PTX, and your target SM is 2.0.  Adjust accordingly.

Clang also knows how to map OpenCL to PTX, so you would do something like:

$ clang test1.cl -Xclang -triple -Xclang nvptx64 -Xclang -target-cpu
-Xclang sm_20 -S



On Wed, Mar 20, 2013 at 3:29 PM, upit <uday_pitambare at yahoo.com> wrote:

> Thanks a lot Justin,
>
> I will remove the toolkit header. Just one last question..(maybe ;) ) If I
> do away with toolkit headers it says unknown type name '__device__'. Does
> this function qualifier have an alternative ? or I can just do away with ?
>
>
>
>
>
> --
> View this message in context:
> http://llvm.1065342.n5.nabble.com/UNREACHABLE-executed-error-while-trying-to-generate-PTX-tp56026p56093.html
> Sent from the LLVM - Dev mailing list archive at Nabble.com.
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>



-- 

Thanks,

Justin Holewinski
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130321/45728a8e/attachment.html>