[Bug tree-optimization/128170] [14/15/16/17 Regression] strlen pass keeps a string length across an aliasing store after strlen of a suffix

[lzy20000419 at outlook dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128170

--- Comment #2 from liu zhenyu <lzy20000419 at outlook dot com> ---
Created attachment 65959
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65959&action=edit
testcase