Re: [PATCH v3] RISC-V: Add Z*inx imcompatible check in gcc

[Kito Cheng <kito.cheng@gmail.com>]

Thanks Jiawei, committed to trunk!

On Wed, Mar 29, 2023 at 12:55 AM Jiawei <jiawei@iscas.ac.cn> wrote:
>
> Z*inx is conflict with float extensions, add incompatible check when
> z*inx and f extension both enabled.
>
> Since all float extension imply f extension and all z*inx extension
> imply zfinx extension, so we just need to check f with zfinx extension
> as the base case.
>
> Co-Authored by: Kito Cheng <kito.cheng@gmail.com>
>
> gcc/ChangeLog:
>
>         * common/config/riscv/riscv-common.cc (riscv_subset_list::parse):
>         * New check.
>
> gcc/testsuite/ChangeLog:
>
>         * gcc.target/riscv/arch-19.c: New test.
>
> ---
>  gcc/common/config/riscv/riscv-common.cc  | 5 +++++
>  gcc/testsuite/gcc.target/riscv/arch-19.c | 4 ++++
>  2 files changed, 9 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.target/riscv/arch-19.c
>
> diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
> index ef221be1eb1..b3c6ec97e7a 100644
> --- a/gcc/common/config/riscv/riscv-common.cc
> +++ b/gcc/common/config/riscv/riscv-common.cc
> @@ -1153,6 +1153,11 @@ riscv_subset_list::parse (const char *arch, location_t loc)
>
>    subset_list->handle_combine_ext ();
>
> +  if (subset_list->lookup("zfinx") && subset_list->lookup("f"))
> +       error_at (loc,
> +       "%<-march=%s%>: z*inx is conflict with float extensions",
> +       arch);
> +
>    return subset_list;
>
>  fail:
> diff --git a/gcc/testsuite/gcc.target/riscv/arch-19.c b/gcc/testsuite/gcc.target/riscv/arch-19.c
> new file mode 100644
> index 00000000000..83c6e00a755
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/riscv/arch-19.c
> @@ -0,0 +1,4 @@
> +/* { dg-do compile } */
> +/* { dg-options "-march=rv64if_zfinx -mabi=lp64" } */
> +int foo() {}
> +/* { dg-error "'-march=rv64if_zfinx': z\\*inx is conflict with float extensions" "" { target *-*-* } 0 } */
> --
> 2.25.1
>