Use get/set_ptr_nonnull in ipa-vrp

Use get/set_ptr_nonnull in ipa-vrp

Use get/set_ptr_nonnull in ipa-vrp
gcc/ChangeLog:

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

	* ipa-prop.c (ipa_compute_jump_functions_for_edge): Set value range
	for pointer type too.
	(ipcp_update_vr): set_ptr_nonnull for pointer.

gcc/testsuite/ChangeLog:

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

	* gcc.dg/ipa/vrp4.c: New test.

From-SVN: r241288