$ git clone https://github.com/drop-stones/dfisan.git
$ cd dfisan
$ mkdir build && cd build
$ cmake -G Ninja ../llvm
$ ninja

$ bin/clang -fsanitize=dfi foo.c

$ bin/clang -fsanitize=dfi -mllvm --debug-only=usedef-log foo.c

$ bin/clang -fsanitize=dfi -mllvm -unaligned-region-only foo.c

$ bin/clang -fsanitize=dfi -mllvm -check-all-unsafe-access foo.c

$ ninja check-dfisan

$ bin/opt --passes=replace-with-safe-alloc --debug-only=protection-target,replace-with-safe-alloc --disable-output foo.ll

$ bin/opt --passes=print-usedef --debug-only=<DEBUG_TYPE> --disable-output foo.ll

$ bin/opt --passes=dfisan --debug-only=<DEBUG_TYPE> --disable-output foo.ll