[Bug rtl-optimization/67443] [5/6 regression] DSE removes required store instruction

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67443

--- Comment #20 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Created attachment 36553
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36553&action=edit
Dejagnu test case for s390/s390x.