PR target/18506

	PR target/18506
	* config/rs6000/altivec.md (vec_init<mode>): New.
	(vec_set<mode>): New.
	(vec_extract<mode>): New.
	* config/rs6000/rs6000.c (rs6000_expand_vector_init): New.
	(rs6000_expand_vector_set): New.
	(rs6000_expand_vector_extract): New.
	(rs6000_legitimate_offset_address_p): Offset addresses are valid
	for Altivec modes before reload.
	(altivec_expand_vec_init_builtin): New.
	(get_element_number): New.
	(altivec_expand_vec_set_builtin): New.
	(altivec_expand_vec_ext_builtin): New.
	(altivec_expand_builtin): Expand vec_init, vec_set, and vec_ext
	builtins.
	(altivec_init_builtins): Init vec_init, vec_set, and vec_ext
	builtins.
	* config/rs6000/rs6000.h (rs6000_builtins): Add
	ALTIVEC_BUILTIN_VEC_INIT_<mode>, ALTIVEC_BUILTIN_VEC_SET_<mode>,
	ALTIVEC_BUILTIN_VEC_EXT_<mode>.
	* config/rs6000/rs6000-protos.h: Declare new functions.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102861 138bc75d-0d04-0410-961f-82ee72b054a4