> Diego, > > I am leaning to just adding noop moves at the birthpoints (dominance > frontiers) as real noop move insns in the streams in the passes that use > ud or du chains. The back end is tolerant of noop moves and without
Hi, while I am with Diego that would preffer PHI nodes on side especially in FUD chain where rest of your SSA is on side too. But if we go with the extra instruction scheme, I think you are much better to use RTL USE instruction. The moves are generated by target machinery and can do funny things, like clobbering flags or whatever. USEs are transparent this way. Honza
