unroll.c (loop_find_equiv_value): If ret is modified between insn and loop_start, ret might not be equivalent to reg.

	* unroll.c (loop_find_equiv_value): If ret is modified between
	insn and loop_start, ret might not be equivalent to reg.

	* gcc.c-torture/execute/20000819-1.x: Remove.

From-SVN: r35857