benchmark double_v, too; use forceToRegisters instead of black hole
benchmark double_v, too; use forceToRegisters instead of black hole

chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc