[Bug tree-optimization/77550] [6/7 Regression] std::deque with -O3 has infinite std::distance

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77550

--- Comment #13 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 39606
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39606&action=edit
somewhat reduced testcase