On Fri, 27 Jan 2023, Richard Sandiford wrote:
> This patch is an optimisation, but it's also a prerequisite for
> fixing PR96373 without regressing vect-xorsign_exec.c.
>
> Currently the vectoriser vectorises:
>
> for (i = 0; i < N; i++)
> r[i] = a[i] * __builtin_copysignf (1.0f, b[i]);
>
This patch is an optimisation, but it's also a prerequisite for
fixing PR96373 without regressing vect-xorsign_exec.c.
Currently the vectoriser vectorises:
for (i = 0; i < N; i++)
r[i] = a[i] * __builtin_copysignf (1.0f, b[i]);
as two unconditional operations (copysign and mult).
tree-ssa-
