S/390: Make builtin creation conditional.

S/390: Make builtin creation conditional.

gcc/ChangeLog:

2015-06-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/s390-builtin-types.def: Add flag to indicate the
	options under which the function type is needed.
	* config/s390/s390-builtins.def: Add flag to indicate the options
	under which the builtin is enabled.
	* config/s390/s390-builtins.h: Add flags parameter to macro
	definitions.
	(bflags_for_builtin): New function.
	(flags_for_builtin): Renamed to ...
	(opflags_for_builtin): ... this.
	* config/s390/s390-c.c (s390_resolve_overloaded_builtin): Rename
	flags_for_builtin to bflags_for_builtin and
	flags_overloaded_builtin_var to opflags_overloaded_builtin_var.
	* config/s390/s390.c: Add initialization of bflags_builtin and
	opflags_builtin arrays.
	Remove code for flags_builtin.
	(s390_init_builtins): Only create builtin function types if one of
	their flags is active.
	Only create builtins if all of their flags are active.
	(s390_expand_builtin): Rename flags_for_builtin to
	opflags_for_builtin.

From-SVN: r224872