On Wed, Nov 10, 2021 at 1:51 PM Richard Sandiford via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> Mark IFN_COMPLEX_MUL as commutative.
>
> Tested on aarch64-linux-gnu and x86_64-linux-gnu. OK to install?
OK
> Richard
>
>
> gcc/
> * internal-fn.c (commutative_binary_fn_p): Handle IFN_COMPLEX_MUL.
>
> gcc/testsuite/
> * gcc.target/aarch64/sve/complex_mul_1.c: New test.
> ---
> gcc/internal-fn.c | 1 +
> .../gcc.target/aarch64/sve/complex_mul_1.c | 16 ++++++++++++++++
> 2 files changed, 17 insertions(+)
> create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/complex_mul_1.c
>
> diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c
> index 7b13db6dfe3..ff7d43f1801 100644
> --- a/gcc/internal-fn.c
> +++ b/gcc/internal-fn.c
> @@ -3829,6 +3829,7 @@ commutative_binary_fn_p (internal_fn fn)
> case IFN_MULHRS:
> case IFN_FMIN:
> case IFN_FMAX:
> + case IFN_COMPLEX_MUL:
> return true;
>
> default:
> diff --git a/gcc/testsuite/gcc.target/aarch64/sve/complex_mul_1.c
> b/gcc/testsuite/gcc.target/aarch64/sve/complex_mul_1.c
> new file mode 100644
> index 00000000000..d197e7d0d8e
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/aarch64/sve/complex_mul_1.c
> @@ -0,0 +1,16 @@
> +/* { dg-options "-O2 -fgimple -fdump-tree-optimized" } */
> +
> +void __GIMPLE
> +foo (__SVFloat64_t x, __SVFloat64_t y, __SVFloat64_t *res1,
> + __SVFloat64_t *res2)
> +{
> + __SVFloat64_t a1;
> + __SVFloat64_t a2;
> +
> + a1 = .COMPLEX_MUL (x, y);
> + a2 = .COMPLEX_MUL (y, x);
> + __MEM<__SVFloat64_t> (res1) = a1;
> + __MEM<__SVFloat64_t> (res2) = a2;
> +}
> +
> +/* { dg-final { scan-tree-dump-times {\.COMPLEX_MUL} 1 "optimized" } } */
> --
> 2.25.1
>
