PR tree-optimization/58277
	* tree-ssa-strlen.c (strlen_enter_block): If do_invalidate gave up
	after seeing too many stmts with vdef in between dombb and current
	bb, invalidate everything.

	* gcc.c-torture/execute/pr58277-1.c: New test.
	* gcc.c-torture/execute/pr58277-2.c: New test.

From-SVN: r202104