2006-12-13  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/17687
	* builtins.def (BUILT_IN_CEXPI, BUILT_IN_CEXPIF, BUILT_IN_CEXPIL):
	New builtins for imaginary argument cexp.
	* builtin-types.def (BT_FN_COMPLEX_FLOAT_FLOAT,
	BT_FN_COMPLEX_DOUBLE_DOUBLE, BT_FN_COMPLEX_LONGDOUBLE_LONGDOUBLE):
	New required builtin types.
	* builtins.c (expand_builtin_cexpi): Declare.
	(mathfn_built_in): Handle BUILT_IN_CEXPI.
	(expand_builtin_cexpi): New static helper.
	(expand_builtin): Call it.
	(do_mpfr_sincos): Adjust for CEXPI evaluation.
	(fold_builtin_sincos): New function to fold sincos to cepxi.

	* gcc.dg/builtins-59.c: New testcase.

From-SVN: r119824