* sanopt.c (sanopt_optimize_walker): Limit removal of the checks.
	Remove vector limit.
testsuite/
	* c-c++-common/ubsan/align-2.c: Add dg-output.
	* c-c++-common/ubsan/align-4.c: Likewise.
	* c-c++-common/ubsan/align-6.c: New test.
	* c-c++-common/ubsan/align-7.c: New test.
	* c-c++-common/ubsan/align-8.c: New test.
	* g++.dg/ubsan/null-1.C: Add dg-output.
	* g++.dg/ubsan/null-2.C: Likewise.
	* g++.dg/ubsan/null-3.C: New test.
	* g++.dg/ubsan/null-4.C: New test.
	* g++.dg/ubsan/null-5.C: New test.

From-SVN: r217189