gcc/

2009-05-17  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c/40172
	* c-common.c (warn_logical_operator): Don't warn if one of
	expression isn't always true or false.

gcc/testscase/

2009-05-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR c/40172
	* gcc.dg/pr40172.c: New.

From-SVN: r147639