Delete VEC_EXTRACT_EVEN/ODD_EXPR.

Delete VEC_EXTRACT_EVEN/ODD_EXPR.

	* tree.def (VEC_EXTRACT_EVEN_EXPR, VEC_EXTRACT_ODD_EXPR): Remove.
	* cfgexpand.c (expand_debug_expr): Don't handle them.
	* expr.c (expand_expr_real_2): Likewise.
	* fold-const.c (fold_binary_loc): Likewise.
	* gimple-pretty-print.c (dump_binary_rhs): Likewise.
	* tree-cfg.c (verify_gimple_assign_binary): Likewise.
	* tree-inline.c (estimate_operator_cost): Likewise.
	* tree-pretty-print.c (dump_generic_node): Likewise.
	* tree-vect-generic.c (expand_vector_operations_1): Likewise.
	* optabs.c (optab_for_tree_code): Likewise.
	(can_vec_perm_for_code_p): Remove.
	(expand_binop): Don't try it.
	(init_optabs): Don't init vec_extract_even/odd_optab.
	* genopinit.c (optabs): Likewise.
	* optabs.h (OTI_vec_extract_even, OTI_vec_extract_odd): Remove.
	(vec_extract_even_optab, vec_extract_odd_optab): Remove.
	* tree-vect-data-refs.c (vect_strided_store_supported): Tidy code.
	(vect_permute_store_chain): Use TYPE_VECTOR_SUBPARTS instead of
	GET_MODE_NUNITS; check vect_gen_perm_mask return value instead of
	asserting vect_strided_store_supported.
	(vect_strided_load_supported): Use can_vec_perm_p.
	(vect_permute_load_chain): Use VEC_PERM_EXPR.

	* doc/generic.texi (VEC_EXTRACT_EVEN_EXPR): Remove.
	(VEC_EXTRACT_ODD_EXPR): Remove.
	* doc/md.texi (vec_extract_even, vec_extract_odd): Remove.

From-SVN: r182669