Bernd Schmidt <ber...@codesourcery.com> writes: >> The reason I'm suddenly "reviewing" the code now is that it >> doesn't prevent shrink-wrapping, because nothing adds register 2 >> to the liveness info of the affected blocks. The temporary prologue >> value of register 2 is then moved into register 15. > > Hmm. Are we just missing another df_analyze call?
Well, if we do the kind of backwards walk I was thinking about (so that we can handle chains), it might be better to update the liveness sets we care about as we go. A full df_analyze after each move would be pretty expensive. Richard
