[Bug tree-optimization/81184] [8 regression] gcc.dg/pr21643.c and gcc.dg/tree-ssa/phi-opt-11.c fail starting with r249450

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81184

--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Note that I posted a related patch some time ago:
https://gcc.gnu.org/ml/gcc-patches/2017-10/msg01477.html