gcc/c-family:

gcc/c-family:
	PR middle-end/49705
	* c-common.c (c_disable_warnings): New static function.
	(c_enable_warnings): New static function.
	(c_fully_fold_internal): Change local unused_p to bool.  Call
	c_disable_warnings and c_enable_warnings rather than change
	c_inhibit_evaluation_warnings.
gcc/testsuite:
	PR middle-end/49705
	* gcc.dg/pr49705.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@176591 138bc75d-0d04-0410-961f-82ee72b054a4