Re: [Patch ARM] Improve vdup_n intrinsics.

[Richard Henderson]

On 06/20/2012 05:44 AM, Ramana Radhakrishnan wrote:
> +         case NEON_DUP:
> +           if (TREE_CODE (argp[0]) == INTEGER_CST
> +               || TREE_CODE (argp[0]) == REAL_CST)
> +             return build_vector_from_val (result_type, argp[0]);
> +           return NULL_TREE;

You can expand this in all cases.  Constants go to VECTOR_CST,
as you're doing, but variables can be expanded via a CONSTRUCTOR.

Check out what we generate for

  (v4si){ x, x, x, x }


r~