https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63155
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> --- Created attachment 44705 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44705&action=edit patch This "simple" one helps. It builds partition bases similar to the -ftree-coalesce-vars case. Correctness needs to be verified still but I think it errs on the safe side (computing too many dependences at most). In particular it avoids computing dependences between things we'll later not try coalescing anyways.
