[Bug tree-optimization/71437] [7 regression] Performance regression after r235817

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71437

--- Comment #9 from amker at gcc dot gnu.org ---
Root cause should be in VRP, looks like the iterative algorithm depends on
order of ssa operands and computes different range.