ia64.c (rtx_needs_barrier): Handle UNSPEC_FR_SQRT_RECIP_APPROX_RES.

ia64.c (rtx_needs_barrier): Handle UNSPEC_FR_SQRT_RECIP_APPROX_RES.

* config/ia64/ia64.c (rtx_needs_barrier): Handle
UNSPEC_FR_SQRT_RECIP_APPROX_RES.
* config/ia64/ia64.c (UNSPEC_FR_SQRT_RECIP_APPROX_RES): Define.
(divsi3_internal, divdi3_internal_lat, divdi3_internal_thr,
divsf3_internal_lat, sqrt_approx, sqrtsf2_internal_thr,
divdf3_internal_lat, sqrtdf2_internal_thr, divxf3_internal_lat,
divxf3_internal_thr, sqrtxf2_internal_thr, recip_approx): Use it.

From-SVN: r134295