[Bug tree-optimization/84956] ICE in replace_block_by, at tree-ssa-tail-merge.c:1546

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84956

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-03-20
                 CC|                            |rguenth at gcc dot gnu.org,
                   |                            |vries at gcc dot gnu.org
          Component|c                           |tree-optimization
     Ever confirmed|0                           |1
      Known to fail|                            |6.4.1, 7.3.1, 8.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  It tries to redirect an abnormal edge 5 -> 7 to 6 where there is
already an abnormal edge from 5 -> 6.