[Bug rtl-optimization/82683] Combine: GCC generates bad code with -tune=thunderx2t99

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82683

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
At the start of combine you have

insn_cost 4 for    18: r91:DI=r83:DI<<0x2
      REG_DEAD r83:DI

Is that death note not correct?