* c-common.c (c_common_type_for_mode): Add V2HImode case.
	* tree.c (build_common_tree_nodes_2): Initialize
	unsigned_V2HI_type_node and V2HI_type_node.
	* tree.h (enum tree_index): Add TI_UV2HI_TYPE and TI_V2HI_TYPE.
	(unsigned_V2HI_type_node, V2HI_type_node): Define.

From-SVN: r58123