[Bug rtl-optimization/71976] [avr] insn-combiner deletes a live 64-bit shift

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71976

--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Created attachment 38954
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38954&action=edit
bug-combin.c.242r.ud_dce