gcc/

	PR tree-optimization/63941
	* tree-if-conv.c (add_to_predicate_list): Delete wrong assertion that
	DOM_BB has non-true predicate, conditionally set non-true predicate
	for BB.

gcc/testsuite/

	PR tree-optimization/63941
	* gcc.dg/torture/pr63941.c: New test.

From-SVN: r218206