* builtins.c (fold_builtin_cos): Use fold_strip_sign_ops().

	(fold_builtin_hypot): Likewise.
	* fold-const.c (fold_strip_sign_ops): Handle "odd" builtins.
	
testsuite:
	* gcc.dg/builtins-20.c: Add more cases for stripping sign ops.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118683 138bc75d-0d04-0410-961f-82ee72b054a4