re PR target/71242 ([ia64] Missing built-in functions for float128 NaNs)

re PR target/71242 ([ia64] Missing built-in functions for float128 NaNs)

	PR target/71242
	* config/ia64/ia64.c (enum ia64_builtins) [IA64_BUILTIN_NANQ]: New.
	[IA64_BUILTIN_NANSQ]: Ditto.
	(ia64_fold_builtin): New function.
	(TARGET_FOLD_BUILTIN): New define.
	(ia64_init_builtins) Declare const_string_type node.
	Add __builtin_nanq and __builtin_nansq builtin functions.
	(ia64_expand_builtin): Handle IA64_BUILTIN_NANQ and IA64_BUILTIN_NANSQ.

testsuite/ChangeLog:

	PR target/71242
	* testsuite/gcc.dg/torture/float128-nan.c: Also run on ia64-*-*.

From-SVN: r237530