re PR middle-end/41453 (use INTENT(out) for optimization)

re PR middle-end/41453 (use INTENT(out) for optimization)

2018-09-22  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/41453
	* trans.h (gfc_conv_expr_reference): Add optional argument
	add_clobber to prototype.
	(gfc_conv_procedure_call):  Set add_clobber argument to
	gfc_conv_procedure_reference to true for scalar, INTENT(OUT),
	non-pointer, non-allocatable, non-dummy variables whose type
	is neither BT_CHARACTER, BT_DERIVED or BT_CLASS, but only if
	the procedure is not elemental.
	* trans-expr.c (gfc_conv_procedure_reference): Add clobber
	statement before call if add_clobber is set.

2018-09-22  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/41453
	* gfortran.dg/intent_optimize_2.f90: New test.

From-SVN: r264506