$ /opt/nec/ve/llvm-vec/2.3.0/bin/llvm-vec --help-list-hidden
OVERVIEW: NEC LLVM-IR Vectorizer

It vectorizes LLVM-IR input and emits an assembly language file for VE.
<input file> must be LLVM-IR file.
See <https://sxauroratsubasa.sakura.ne.jp/Documentation/> for details.

USAGE: llvm-vec [options] <input file>

OPTIONS:
  -h                  - Alias for --help
  --help              - Display available options (--help-hidden for more)
  --help-hidden       - Display all available options
  --help-list         - Display list of available options (--help-list-hidden for more)
  --help-list-hidden  - Display list of all available options
  --print-all-options - Print all option values after command line parsing
  --print-options     - Print non-default options after command line parsing
  --version           - Display the version of this program

$ /opt/nec/ve/llvm-vec/2.3.0/bin/llvm-vec --print-all-options
llvm-vec: Warning: unrecognized option '--print-all-options'
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_S_construct null not valid
PLEASE submit a bug report to <https://sxauroratsubasa.sakura.ne.jp/forums/>.
Stack dump:
0.	Program arguments: /opt/nec/ve/llvm-vec/2.3.0/bin/llvm-vec --print-all-options
Aborted

$ /opt/nec/ve/llvm-vec/2.3.0/bin/llvm-vec --print-options
llvm-vec: Warning: unrecognized option '--print-options'
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_S_construct null not valid
PLEASE submit a bug report to <https://sxauroratsubasa.sakura.ne.jp/forums/>.
Stack dump:
0.	Program arguments: /opt/nec/ve/llvm-vec/2.3.0/bin/llvm-vec --print-options
Aborted