https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65951
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-04-30 Summary|[AArch64] Will not |[AArch64] Will not |vectorize multiplication by |vectorize 64bit integer |long constant |multiplication Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Another example which shows the problem is not related to the constant but just the multiply: void foo (long long * restrict arr, long long * restrict arr1) { for (int i = 0; i < 256; i++) arr[i] *= arr1[i]; }