Use get_ptr_nonnull in tree-vrp
gcc/testsuite/ChangeLog:

2016-10-18  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* gcc.dg/ipa/vrp4.c: Adjust testcase.

gcc/ChangeLog:

2016-10-18  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* tree-vrp.c (get_value_range): Check get_ptr_nonnull.

From-SVN: r241289