topic offline compiler llvm code problem in OpenCL* for CPU

offline compiler llvm code problem

tseng00g — Tue, 07 Feb 2012 10:56:49 GMT

in openCL SDK 1.5

using offline compiler compile CL kernel with -llvm option to generate llvm IR

then use llvm-as convert llvm IR -> bitcode will pop error: (llvm version:3.1 svn)

llvm-as: hello.ll:39:9: error: expected type

define x86_ocl_kernelcc void @hello(i8 addrspace(1)* nocapture %string, i8 addrspace(3)* %pLocalMem, %struct.WorkDim* %pWorkDim, i64* %pWGId, %struct.PaddedDimId* %pBaseGlbId, %struct.PaddedDimId* %pLocalIds, i64* %contextpointer, i64 %iterCount, i8* %pSpecialBuf, i64* %pCurrWI) nounwind {

this kernel come from "The openCL programming book" sample code 3-1

http://www.fixstars.com/en/opencl/book/

i've tried some CL kernel, and this error always occurred

and their's a bug in offline compiler windows version ,the "save LLVM..." option default file

type should be "*.ll" not "*.bc" , the offline compiler generate human readable llvm code.

offline compiler llvm code problem

Jim_Vaughn — Tue, 07 Feb 2012 21:37:43 GMT

I would imagine no one at intel has tested their code with version 3.1 as 3.0 was release in December which was after the latest release of Intel's OpenCL SDK and runtime.

offline compiler llvm code problem

tseng00g — Wed, 08 Feb 2012 04:50:21 GMT

oh it also happend at llvm 3.0, so i upgraded llvm at once and thought it might fixed this at 3.1.

offline compiler llvm code problem

Evgeny_F_Intel — Wed, 08 Feb 2012 05:43:55 GMT

Please use llvm tools coming with Intel SDK.

offline compiler llvm code problem

tseng00g — Thu, 09 Feb 2012 02:08:04 GMT

i found llvm tool (llc) in SDK windows version, linux version doesn't include that tool. thanks.

offline compiler llvm code problem

Amjad_A_Intel — Thu, 09 Feb 2012 16:12:56 GMT

-llvm flag generates a file with extension .bc, but it is a readable file just like the .ll
You may try open it in a text editor and you will get the textual llvm code.

We will consider your suggestion of changing the extension type to *.ll instead of *.bc.

Thanks,
Amjad