* tree-ssa-reassoc.c: Include rtl.h and tm_p.h.
	(optimize_range_tests_1): New function,
	extracted from optimize_range_tests.
	(optimize_range_tests_xor): Similarly.
	(optimize_range_tests_diff): New function.
	(optimize_range_tests): Use optimize_range_tests_1.

	* gcc.dg/tree-ssa/reassoc-32.c: New test case.
	* gcc.dg/tree-ssa/reassoc-33.c: New test case.
	* gcc.dg/tree-ssa/reassoc-34.c: New test case.
	* gcc.dg/tree-ssa/reassoc-35.c: New test case.
	* gcc.dg/tree-ssa/reassoc-36.c: New test case.

From-SVN: r203627