[PATCH, PR tree-optimization/PR68305] Support masked COND_EXPR in SLP

Richard Biener richard.guenther@gmail.com
Thu Nov 12 12:33:00 GMT 2015


On Thu, Nov 12, 2015 at 1:03 PM, Ilya Enkovich <enkovich.gnu@gmail.com> wrote:
> Hi,
>
> This patch fixes a way operand is chosen by its num for COND_EXPR.  Bootstrapped and regtested on x86_64-unknown-linux-gnu.  OK for trunk?

Ok.

Thanks,
Richard.

> Thanks,
> Ilya
> --
> gcc/
>
> 2015-11-12  Ilya Enkovich  <enkovich.gnu@gmail.com>
>
>         PR tree-optimization/68305
>         * tree-vect-slp.c (vect_get_constant_vectors): Support
>         COND_EXPR with SSA_NAME as a condition.
>
> gcc/testsuite/
>
> 2015-11-12  Ilya Enkovich  <enkovich.gnu@gmail.com>
>
>         PR tree-optimization/68305
>         * gcc.dg/vect/pr68305.c: New test.
>
>
> diff --git a/gcc/testsuite/gcc.dg/vect/pr68305.c b/gcc/testsuite/gcc.dg/vect/pr68305.c
> new file mode 100644
> index 0000000..fde3db7
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/vect/pr68305.c
> @@ -0,0 +1,13 @@
> +/* { dg-do compile } */
> +/* { dg-additional-options "-O3" } */
> +/* { dg-additional-options "-mavx2" { target avx_runtime } } */
> +
> +int a, b;
> +
> +void
> +fn1 ()
> +{
> +  int c, d;
> +  for (; b; b++)
> +    a = a ^ !c ^ !d;
> +}
> diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
> index 9d97140..9402474 100644
> --- a/gcc/tree-vect-slp.c
> +++ b/gcc/tree-vect-slp.c
> @@ -2738,18 +2738,20 @@ vect_get_constant_vectors (tree op, slp_tree slp_node,
>               switch (code)
>                 {
>                   case COND_EXPR:
> -                   if (op_num == 0 || op_num == 1)
> -                     {
> -                       tree cond = gimple_assign_rhs1 (stmt);
> +                   {
> +                     tree cond = gimple_assign_rhs1 (stmt);
> +                     if (TREE_CODE (cond) == SSA_NAME)
> +                       op = gimple_op (stmt, op_num + 1);
> +                     else if (op_num == 0 || op_num == 1)
>                         op = TREE_OPERAND (cond, op_num);
> -                     }
> -                   else
> -                     {
> -                       if (op_num == 2)
> -                         op = gimple_assign_rhs2 (stmt);
> -                       else
> -                         op = gimple_assign_rhs3 (stmt);
> -                     }
> +                     else
> +                       {
> +                         if (op_num == 2)
> +                           op = gimple_assign_rhs2 (stmt);
> +                         else
> +                           op = gimple_assign_rhs3 (stmt);
> +                       }
> +                   }
>                     break;
>
>                   case CALL_EXPR:



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