[Bug target/38899] pessimizes function without SSE intrinsics

[Joey dot ye at intel dot com]

------- Comment #2 from Joey dot ye at intel dot com  2009-01-21 02:40 -------
Following case isn't vecterized with -O3 on x86_64 either, although arrays are
aligned:
#include <stdio.h>

float __attribute__((aligned(16))) in1[] = {
                1.2, 3.5, 1.7, 2.8
};
float __attribute__((aligned(16))) in2[] = {
                -0.7, 2.6, 3.3, -4.0
};
float __attribute__((aligned(16))) out[4]; 
void __attribute__((noinline)) mul()
{
        int i;
        for (i = 0; i < 4; i++)
                out[i] = in1[i] * in2[i];
}

int main(void)
{
        mul();
        printf("%f %f %f %f\n", out[0], out[1], out[2], out[3]);
        return 0;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38899