builtins.c (expand_builtin_memmove): Remove ORIG_EXP argument; don't do conversion from memmove to memcpy here.

	* builtins.c (expand_builtin_memmove): Remove ORIG_EXP argument;
	don't do conversion from memmove to memcpy here.
	(expand_builtin_bcopy, expand_builtin): Update call of
	expand_builtin_memmove.
	(fold_builtin_memory_op): Do folding of memmove to memcpy here.

	* gcc.dg/memmove-1.c: New test.

From-SVN: r117979