[Bug tree-optimization/66823] -ftree-loop-if-convert-stores miscompiles gfortran.dg/elemental_optional_args_3.f90

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66823

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 35943
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35943&action=edit
patch triggering fails without -ftree-loop-if-convert-stores

Discovered while testing attached patch to improve if-conversion of loads