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2015-11-26 13:33 GMT+03:00 Ilya Enkovich <enkovich....@gmail.com>:
> Hi,
>
> This patch allows usage of scalar masks for ymm and xmm registers when target
> supports it. Bootstrapped and regtested on x86_64-unknown-linux-gnu. OK for
> trunk?
>
> Thanks,
> Ilya
> --
> gcc/
>
> 2015-11-26 Ilya Enkovich <enkovich....@gmail.com>
>
> * config/i386/i386.c (ix86_get_mask_mode): Use scalar
> modes for 32 and 16 byte vectors when possible.
>
> gcc/testsuite/
>
> 2015-11-26 Ilya Enkovich <enkovich....@gmail.com>
>
> * gcc.dg/vect/vect-32-chars.c: New test.
>
>
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index 83749d5..d7c359f 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -53443,7 +53443,8 @@ ix86_get_mask_mode (unsigned nunits, unsigned
> vector_size)
> unsigned elem_size = vector_size / nunits;
>
> /* Scalar mask case. */
> - if (TARGET_AVX512F && vector_size == 64)
> + if ((TARGET_AVX512F && vector_size == 64)
> + || (TARGET_AVX512VL && (vector_size == 32 || vector_size == 16)))
> {
> if (elem_size == 4 || elem_size == 8 || TARGET_AVX512BW)
> return smallest_mode_for_size (nunits, MODE_INT);
> diff --git a/gcc/testsuite/gcc.dg/vect/vect-32-chars.c
> b/gcc/testsuite/gcc.dg/vect/vect-32-chars.c
> new file mode 100644
> index 0000000..0af5d2d
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/vect/vect-32-chars.c
> @@ -0,0 +1,16 @@
> +/* { dg-do compile } */
> +/* { dg-additional-options "-mavx512bw -mavx512vl" { target { i?86-*-*
> x86_64-*-* } } } */
> +
> +char a[32];
> +char b[32];
> +char c[32];
> +
> +void test()
> +{
> + int i = 0;
> + for (i = 0; i < 32; i++)
> + if (b[i] > 0)
> + a[i] = c[i];
> +}
> +
> +/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { target {
> i?86-*-* x86_64-*-* } } } } */
