[PATCH v5] RISC-V: Add vector psabi checking.

[Kito Cheng]

Hi Yan-Zhang:

OK with one minor, go ahead IF the regression is clean.

Hi Pan:

Could you help to verify this patch and commit if the regression is clean?

thanks :)

> diff --git a/gcc/testsuite/gcc.target/riscv/rvv/rvv.exp b/gcc/testsuite/gcc.target/riscv/rvv/rvv.exp
> index 5e69235a268..ad79d0e9a8d 100644
> --- a/gcc/testsuite/gcc.target/riscv/rvv/rvv.exp
> +++ b/gcc/testsuite/gcc.target/riscv/rvv/rvv.exp
> @@ -43,7 +43,7 @@ dg-init
>  # Main loop.
>  set CFLAGS "$DEFAULT_CFLAGS -march=$gcc_march -mabi=$gcc_mabi -O3"

Add -Wno-psabi here rather than below, and also add it for
g++.target/riscv/rvv/rvv.exp

>  dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/base/*.\[cS\]]] \
> -       "" $CFLAGS
> +       "-Wno-psabi" $CFLAGS
>  gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/vsetvl/*.\[cS\]]] \
>         "" $CFLAGS
>  dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/autovec/*.\[cS\]]] \