https://llvm.org/bugs/show_bug.cgi?id=23674
Bug ID: 23674
Summary: llc uses feature rsqrt.approx.ftz.f64 that requires a
later version
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PTX
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
I'm using the trunk version of clang-omp and it tries to compile the CUDA
library libdevice with the following commands (a bit simplified):
$ opt <cuda-dir>/nvvm/libdevice/libdevice.compute_35.10.bc -O1 -nvvm-reflect -o
libdevice.bc
$ llc libdevice.bc -o libdevice.ptx -mcpu=sm_35
$ ptxas libdevice.bc -o libdevice.cubin -arch sm_35
CUDA Toolkit 7.0.28 then complains:
ptxas libdevice.ptx, line 19566; error : Feature 'rsqrt.approx.ftz.f64'
requires PTX ISA .version 4.0 or later
[...]
Could as well be an error in libdevice...
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