--help shows -time and -print-stats; yet, driver does not recognize them

[Quuxplusone]

Bugzilla Link	PR14084
Status	NEW
Importance	P enhancement
Reported by	Larry Evans (cppljevans@gmail.com)
Reported on	2012-10-15 06:36:09 -0700
Last modified on	2012-10-15 18:58:03 -0700
Version	trunk
Hardware	PC Linux
CC	geek4civic@gmail.com, llvm-bugs@lists.llvm.org, paul.robinson@am.sony.com, pawel@32bitmicro.com
Fixed by commit(s)
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Neither the -time or -print-stats flag is recognized by the driver
even though both appear in the --help output:

make compiler_help_driver MAIN=test
/home/evansl/download/llvm/svn/install/bin/clang --help|grep -e ' -time\| -
print-stat'
  -print-stats            Print performance metrics and statistics
  -time                   Time individual commands
/home/evansl/download/llvm/svn/install/bin/clang -time -print-stats -c test.cpp
clang: warning: argument unused during compilation: '-time'
clang: warning: argument unused during compilation: '-print-stats'
/home/evansl/download/llvm/svn/install/bin/clang -v
clang version 3.2 (trunk 165317)
Target: x86_64-unknown-linux-gnu
Thread model: posix
uname -a
Linux evansl-desktop 2.6.32-41-generic #90-Ubuntu SMP Tue May 22 11:29:51 UTC
2012 x86_64 GNU/Linux

[Quuxplusone]

I was noticing recently that --help will display 'cc1' options as well as
driver options.  While that might be optimal for Clang developers, it is
not especially nice for Clang users.

Also Clang won't display an option that has no defined help text. That
seems like kind of a funny way to identify hidden options.