Hi Zheng,
You can find some examples in test/CodeGenOpenCL/, but they are not builtin
functions.
The warning is because these buitin functions need implementation for the
target device, so it is normal that these builtin functions does not have
declarations of definitions in clang.
If you want to see some llvm ir of a OpenCL implementation you can try Beignet
http://www.freedesktop.org/wiki/Software/Beignet/ on Linux or Intel CodeBuilder
on Windows, they both use clang as front-end and can dump llvm ir.
ThanksXiuli
Date: Fri, 15 Jan 2016 18:12:00 +0000
To: cfe-users@lists.llvm.org
Subject: [cfe-users] Emit LLVM IR from OpenCL
From: cfe-users@lists.llvm.org
Hi,
Could anybody give me an example of emitting LLVM IR from OpenCL code?
I tried this for the backprop benchmark from the rodinia benchmark suite:
clang -x cl backprop_kernel.cl -emit-llvm -S -o backprop_kernel.ll
and the the following warning:backprop_kernel.cl:24:13: warning: implicit
declaration of function 'get_group_id' is invalid in C99
[-Wimplicit-function-declaration] int by = get_group_id(1);
^backprop_kernel.cl:25:13: warning: implicit declaration of function
'get_local_id' is invalid in C99 [-Wimplicit-function-declaration] int tx =
get_local_id(0); ^backprop_kernel.cl:34:3: warning: implicit
declaration of function 'barrier' is invalid in C99
[-Wimplicit-function-declaration] barrier(CLK_LOCAL_MEM_FENCE);
^3 warnings generated.
Does it seem okay?
--
Cheers,Zheng
_______________________________________________
cfe-users mailing list
cfe-users@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
_______________________________________________
cfe-users mailing list
cfe-users@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
