[Bug tree-optimization/81884] [6/7/8 Regression] Invalid code generation with zero size arrays or flexible array members

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81884

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 42000
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42000&action=edit
patch in testing