[Bug tree-optimization/91510] r253207 fixed a wrong-code bug

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91510

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46742
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46742&action=edit
original testcase

Original testcase.