https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61515
--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> --- Created attachment 33766 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33766&action=edit non-working patch Of course this still walks all SSA names (but only once per BB), so it isn't really removing the quadraticness. Moreover the patch (see attachment) I was testing fails to bootstrap on the 4.9 branch, seemingly miscompiling stage2 gcc (and crashing in building stage2 libgcc in swap_tree_comparison called from IVOPTs). Eventually record_temporary_equivalences_from_stmts_at_dest depends on the exact ordering of record_temporary_equivalence calls (I do the invaldiate ones late). Jeff? As this is a regression from 4.9.0 appearing in 4.9.1 it's quite bad that this is now still unfixed given we are about to release 4.9.2. I'm out of here again ;)
