I am writing an LLVM Function pass. I would like to call Loop Pass on each of Loops in the function. However I am not able to call a Loop Pass from Function Pass. When I add addRequired for required loop pass, it gives error that it can't schedule that pass.
Any workarounds?
I'm wondering if you want to run the LoopPass on every loop, then why don't you just invoke the loop pass normally via command line ? by the way it is possible to invoke a loop pass inside function pass. LoopPassManager is doing exactly what you want, it is a function pass which runs loops passes on every loop. so take a look at LPPassManager class in LoopPass.cpp and LoopPass.h