The cool thing about LLVM is that "jamming passes" in, is something an individual team can do, adding a pass simply involves running opt -load path/to/pass.s

The cool thing about LLVM is that "jamming passes" in, is something an individual team can do, adding a pass simply involves running opt -load path/to/pass.so < IR.bc Which emits (hopefully) optimised IR. Neat huh?