PR middle-end/10472
	* builtins.c (expand_builtin_memcpy):  Call force_operand on
	expressions and use simplify_gen_binary to create the addition.

	* gcc.c-torture/compile/20030518-1.c: New test case.

Co-Authored-By: Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
Co-Authored-By: Zack Weinberg <zack@codesourcery.com>

From-SVN: r66941