[Bug tree-optimization/70032] tree-ssa-tail-merge engine replacement

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70032

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-03-02
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the very first "cleanup" would be to rip out all value numbering use from
the current implementation and make the pass properly separate.  Now that
FRE/PRE do full copy/constant propagation valueization shouldn't be necessary
any more.  And the special VN hacks for tail-merging could be removed
obviously.