ia64: Implement vec_perm_const.

ia64: Implement vec_perm_const.

        * config/ia64/ia64.c (MAX_VECT_LEN): New.
        (struct expand_vec_perm_d): New.
        (TARGET_VECTORIZE_VEC_PERM_CONST_OK): New.
        (ia64_unpack_assemble): Use ia64_expand_vec_perm_const_1.
        (expand_vselect, expand_vselect_vconcat): New.
        (expand_vec_perm_identity, expand_vec_perm_shrp): New.
        (expand_vec_perm_1, expand_vec_perm_broadcast): New.
        (expand_vec_perm_interleave_2, expand_vec_perm_v4hi_5): New.
        (ia64_expand_vec_perm_const_1, ia64_expand_vec_perm_const): New.
        (ia64_vectorize_vec_perm_const_ok): New.
        (ia64_expand_vec_setv2sf, ia64_expand_vec_perm_even_odd): New.
        * config/ia64/ia64-protos.h: Update.
        * config/ia64/vect.md (VEC): New mode iterator.
        (vecint): New mode attribute.
        (vec_interleave_lowv8qi, vec_interleave_highv8qi): Privatize with '*'.
        (vec_interleave_lowv4hi, vec_interleave_highv4hi): Likewise.
        (vec_interleave_lowv2si, vec_interleave_highv2si): Likewise.
        (vec_interleave_lowv2sf, vec_interleave_highv2sf): Likewise.
        (mix1_even, mix1_odd, mux1_alt): Likewise.
        (mux1_brcst_qi): Remove '*' from name.
        (vec_extract_evenv8qi, vec_extract_oddv8qi): Remove.
        (vec_extract_evenv4hi, vec_extract_oddv4hi): Remove.
        (vec_extract_evenv2si, vec_extract_oddv2si): Remove.
        (vec_extract_evenv2sf, vec_extract_oddv2sf): Remove.
        (vec_extract_evenodd_helper): Remove.
        (vec_setv2sf): Use ia64_expand_vec_setv2sf.
        (vec_pack_trunc_v4hi): Use ia64_expand_vec_perm_even_odd.
        (vec_pack_trunc_v2si): Likewise.
        (vec_perm_const<VEC>): New.

From-SVN: r182564