Oh, one minor comment:
> +/* { dg-additional-options "-march=rv64gc_zbb" { target { lp64 &&
> riscv64*-*-* } } } */
{ target { rv64 } here
> +/* { dg-additional-options "-march=rv32gc_zbb" { target { ilp32 &&
> riscv64*-*-* } } } */
and { target { rv32 } here
That should make riscv32*-*-* also able to test with this testcase.
