llvm dev - Nov 2014 - [LLVMdev] writing, registerng and running a machine function pass

​​Hello everybody.

I write and run some llvm regular passes with opt with these simple
commands:

clang++ -c mypass.cpp `llvm-config --cxxflags`
clang++ -shared -o mypass.so mypass.o `llvm-config --ldflags`
opt -load ./mypass.so -mypass < sample.bc > /dev/null

But I would like to write, register and run machine function pass. I know
these passes cannot generally be run from the opt or bugpoint commands.
What do I do and how? I didn’t find any example.

I am newbie on llvm.

Thanks.
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