PR tree-optimization/66299
	* match.pd ((CST1 << A) == CST2 -> A == ctz (CST2) - ctz (CST1)
	((CST1 << A) != CST2 -> A != ctz (CST2) - ctz (CST1)): New
	patterns.

	* gcc.dg/pr66299-1.c: New test.
	* gcc.dg/pr66299-2.c: New test.
	* gcc.dg/pr66299-3.c: New test.

From-SVN: r224283