[Bug tree-optimization/86622] [9 Regression] incorrect strlen of array of array plus variable offset

[um at mutluit dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86622

--- Comment #4 from U.Mutlu <um at mutluit dot com> ---
gcc version 4.9.2 (Debian 4.9.2-10+deb8u1) gives the same result as v9:
p=123456 n=6