With this patch GCC implements an Altivec style set of builtins to
make use of vector instructions in C/C++ code.  This is provided for
compatibility with the IBM XL compiler.

gcc/
	* config.gcc: Add vecintrin.h to extra_headers.  Add s390-c.o to
	c_target_objs and cxx_target_objs.  Add t-s390 to tmake_file.
	* config/s390/s390-builtin-types.def: New file.
	* config/s390/s390-builtins.def: New file.
	* config/s390/s390-builtins.h: New file.
	* config/s390/s390-c.c: New file.
	* config/s390/s390-modes.def: Add modes CCVEQANY, CCVH,
	CCVHANY, CCVHU, CCVHUANY, CCVFHANY, CCVFHEANY.
	* config/s390/s390-protos.h (s390_expand_vec_compare_cc)
	(s390_cpu_cpp_builtins, s390_register_target_pragmas): Add
	prototypes.
	* config/s390/s390.c (s390-builtins.h, s390-builtins.def):
	Include.
	(flags_builtin, flags_overloaded_builtin_var, s390_builtin_types)
	(s390_builtin_fn_types, s390_builtin_decls, code_for_builtin): New
	variable definitions.
	(s390_const_operand_ok): New function.
	(s390_expand_builtin): Rewrite.
	(s390_init_builtins): New function.
	(s390_handle_vectorbool_attribute): New function.
	(s390_attribute_table): Add s390_vector_bool attribute.
	(s390_match_ccmode_set): Handle new cc modes CCVH, CCVHU.
	(s390_branch_condition_mask): Generate masks for new modes.
	(s390_expand_vec_compare_cc): New function.
	(s390_mangle_type): Add mangling for vector bool types.
	(enum s390_builtin): Remove.
	(s390_atomic_assign_expand_fenv): Rename constants for sfpc and
	efpc builtins.
	* config/s390/s390.h (TARGET_CPU_CPP_BUILTINS): Call
	s390_cpu_cpp_builtins.
	(REGISTER_TARGET_PRAGMAS): New macro.
	* config/s390/s390.md: Define more UNSPEC_VEC_* constants.
	(insn_cmp mode attribute): Add new CC modes.
	(s390_sfpc, s390_efpc): Rename patterns to sfpc and efpc.
	(lcbb): New pattern definition.
	* config/s390/s390intrin.h: Include vecintrin.h.
	* config/s390/t-s390: New file.
	* config/s390/vecintrin.h: New file.
	* config/s390/vector.md: Include vx-builtins.md.
	* config/s390/vx-builtins.md: New file.S/390 zvector builtin support.

From-SVN: r223398