Some projects use
#pragma nv_exec_check_disable
and/or
#pragma hd_warning_disable
to silence NVCC warning
As was indicated in comments and a now (incorrectly) moderator deleted answer, all pragmas supported by cicc
(the front end parser for device code) remain undocumented.
However, if you are truly interested in what might or might not be supported, you can look through the strings stored in cicc
and see that there are an apparent cornucopia of feature control pragmas in the executable. All undocumented, unfortunately.