How many bytes of the previous stack frame did we access as parameters? This function has had a longer and complicated evolution, and it's still not correct, but it's getting closer. It used to be in def use analysis before coming to funcs.cpp, and it may move again into RegisterUsage. It may need additional cleanup since the code has changed so many times. Most recently, Cory has observed that
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected