* trans-array.c (gfc_build_constant_array_constructor): When the
	shape of the constructor is known, use that to construct the
	gfc_array_spec.
	(gfc_trans_constant_array_constructor): Initialize the "info"
	information for all of the dimensions of the array constructor.
	(constant_array_constructor_loop_size): New function.
	(gfc_trans_array_constructor): Use it to determine whether a
	loop is suitable for "constant array constructor" optimization.

	* trans-intrinsic.c (gfc_conv_intrinsic_anyall): Use fold_build2
	instead of build2, to avoid conditions like "(a != b) != 0".

	* gfortran.dg/array_constructor_15.f90: New test case.

From-SVN: r122103