[Bug middle-end/118384] [14/15/16/17 Regression] unexpected call to __muldi3 generated for riscv target

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118384

--- Comment #14 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Huaqi from comment #6)
> Thanks Kito， this `-fno-ssa-phiopt` option also works.

What you can try is to defeat the pattern with a source hack, like so:

    if (a & 1) {
        __asm ("");
        Product += b;
    }

-fno-ssa-phiopt might spill the baby with the bath.