[llvm-dev] llc: Unknown command line argument '-debug-only=isel'

[Leslie Zhai via llvm-dev]

Hi LLVM developers,

llc -march=mips -debug-only=isel was able to work in Nov 8 2017 
https://reviews.llvm.org/D39723

But it doesn't work now:

$ clang --version
LLVM China clang version 6.0.0 (git at github.com:llvm-mirror/clang.git 
9b7b03045ee9b5622028537266aafeb9ea218ac1) 
(git at github.com:llvm-mirror/llvm.git 
3a26601a88394c02603b8756527c55df9ab94d78) (based on LLVM 6.0.0svn)
Target: x86_64-redhat-linux
Thread model: posix
InstalledDir: /data/project/xiangzhai/llvm/build/./bin
$ llc --version
LLVM (http://llvm.org/):
   LLVM version 6.0.0svn
   Optimized build.
   Default target: x86_64-redhat-linux
   Host CPU: broadwell

llc: Unknown command line argument '-debug-only=isel'.  Try: 
'/data/project/xiangzhai/llvm/build/bin/llc -help'
llc: Did you mean '-debug-pass=isel'?

I couldn't grep debug-only command flags or options via git log, please 
give me some hint, thanks a lot!

-- 
Regards,
Leslie Zhai - https://reviews.llvm.org/p/xiangzhai/