On Mon, 23 Jun 2025, Tamar Christina wrote:
> Consider the loop
>
> void f1 (int *restrict a, int n)
> {
> #pragma GCC unroll 4 requested
> for (int i = 0; i < n; i++)
> a[i] *= 2;
> }
>
> Which today is vectorized and then unrolled 3x by the RTL unroller due to the
> use of the pragma. T
Consider the loop
void f1 (int *restrict a, int n)
{
#pragma GCC unroll 4 requested
for (int i = 0; i < n; i++)
a[i] *= 2;
}
Which today is vectorized and then unrolled 3x by the RTL unroller due to the
use of the pragma. This is unfortunate because the pragma was intended for the
scalar l
