gcc/
	* machmode.h (bitwise_mode_for_mode): Declare.
	* stor-layout.h (bitwise_type_for_mode): Likewise.
	* stor-layout.c (bitwise_mode_for_mode): New function.
	(bitwise_type_for_mode): Likewise.
	* builtins.c (fold_builtin_memory_op): Use it instead of
	int_mode_for_mode and build_nonstandard_integer_type.

gcc/testsuite/
	* gcc.dg/memcpy-5.c: New test.

From-SVN: r209622