[Bug target/82981] [7/8 Regression] unnecessary __multi3 call for mips64r6 linux kernel

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42600
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42600&action=edit
gcc8-pr82981.patch

Possible untested fix.