trans-expr.c (gfc_trans_assignment_1): New subroutine to scalarize array assignments...

trans-expr.c (gfc_trans_assignment_1): New subroutine to scalarize array assignments split out from gfc_trans_assignment.

	* trans-expr.c (gfc_trans_assignment_1): New subroutine to scalarize
	array assignments split out from gfc_trans_assignment.
	(gfc_trans_array_copy): New function to implement array to array
	copies via calls to __builtin_memcpy.
	(copyable_array_p): New helper function to identify an array of
	simple/POD types, that may be copied/assigned using memcpy.
	(gfc_trans_assignment): Use gfc_trans_array_copy to handle simple
	whole array assignments considered suitable by copyable_array_p.
	Invoke gfc_trans_assignment_1 to perform the fallback scalarization.

	* gfortran.dg/array_memcpy_1.f90: New test case.
	* gfortran.dg/array_memcpy_2.f90: Likewise.

From-SVN: r120503