[Bug tree-optimization/85859] [6/7/8/9 Regression] wrong code with -fno-isolate-erroneous-paths-dereference

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85859

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 44305
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44305&action=edit
Tentative patch