re PR rtl-optimization/64255 (failures with -O2 optimization on i >= 0 ? (unsigned long) i : - (unsigned long) i)

	PR rtl-optimization/64255
	* gcc.c-torture/execute/pr64255.c: New test.

	PR rtl-optimization/64260
	* gcc.c-torture/execute/pr64260.c: New test.

From-SVN: r218665