No -debug-only option in clang-12

[li-xin-yi]

When I tried

$LLVM_DIR/bin/opt -S -load-pass-plugin <build_dir>/lib/libMBAAdd.so -passes=mba-add input_for_mba.ll -debug-only=mba-add -stats -o out.ll

It gives

opt-12: Unknown command line argument '-debug-only=mba-add'.  Try: 'opt-12 --help'
opt-12: Did you mean '--debug-pass=mba-add'?

But both

$LLVM_DIR/bin/opt -S -load-pass-plugin <build_dir>/lib/libMBAAdd.so -passes=mba-add input_for_mba.ll --debug-pass=Structure -stats -o out1.ll

and

$LLVM_DIR/bin/opt -S -load-pass-plugin <build_dir>/lib/libMBAAdd.so -passes=mba-add input_for_mba.ll -o out2.ll

generate the exactly same output files when comparing them by diff out1.ll out2.ll. I have no idea what goes wrong here.

$opt-12 --version
LLVM (http://llvm.org/):
  LLVM version 12.0.1
  
  Optimized build.
  Default target: x86_64-pc-linux-gnu
  Host CPU: broadwell

[YuhengHuang42]

Please take a look at this: #20

[banach-space]

👋🏻 @li-xin-yi!

Thanks for stopping by and for submitting this. Apologies for the delay, I was away for a while.

As @YuhengHuang42 points out (thank you!), #20 deals already provides a solution. Please also note that there's a dedicated note in README.md:

Note that for these macros to work you need a debug build of LLVM (i.e. opt) and llvm-tutor (i.e. use -DCMAKE_BUILD_TYPE=Debug instead of -DCMAKE_BUILD_TYPE=Release).

I will close this as I think this is now re-solved. Please re-open if you are still stuck!

All the best,
-Andrzej