Eh, kinda? I mean regalloc is not an optimisation pass. And SROA/GVM go through whole functions, but they don't really optimise across blocks. They do local cha

Eh, kinda? I mean regalloc is not an optimisation pass. And SROA/GVM go through whole functions, but they don't really optimise across blocks. They do local changes only with information from previous blocks available. I meant that I don't know of anything that makes modifications across multiple blocks as one complex change. Even licm pokes one thing at a time from one block to a different one. There's no complex "let's replace this kind of cross-block pattern with a different equivalent code that changes multiple blocks at the same time".