* tree.h (POINTER_TYPE_OVERFLOW_UNDEFINED): Delete.
	* fold-const.c (fold_comparison, fold_binary_loc): Delete use of
	above macro.
	* match.pd: Ditto in address comparison pattern.

	gcc/testsuite
	* gcc.dg/no-strict-overflow-7.c: Revise comment and test string.
	* gcc.dg/tree-ssa/pr81388-1.c: Ditto.

From-SVN: r250765