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Re: [Patch, fortran] PR31205 - aliased operator assignment produces wrong result


2007-06-30 Paul Thomas <pault@gcc.gnu.org>

	PR fortran/31205
	* trans-expr.c (gfc_conv_function_call): Remove the default
	initialization of intent(out) derived types.
	* symbol.c (gfc_lval_expr_from_sym): New function.
	* matchexp.c (gfc_get_parentheses): Rsolve argument expression
	and return argument, if it is not numeric and posseses a ref.
	* gfortran.h : Add prototype for gfc_lval_expr_from_sym.
	* resolve.c (has_default_initializer): Move higher up in file.
	(resolve_code): On detecting an interface assignment, check
	if the rhs and the lhs are the same symbol.  If this is so,
	enclose the rhs in parenetheses to generate a temporary and
	prevent any possible aliasing.
	(apply_default_init): Remove code making the lval and call
	gfc_lval_expr_from_sym instead.
	* trans-decl.c (gfc_trans_deferred_vars): Apply the a default
	initializer, if any, to an intent(out) derived type, using
	gfc_lval_expr_from_sym and gfc_trans_assignment.  Check if
	the dummy is present.


2007-06-30 Paul Thomas <pault@gcc.gnu.org>


	PR fortran/31205
	* gfortran.dg/alloc_comp_basics_1.f90 : Restore number of
	"deallocates" to 24, since patch has code rid of much spurious
	code.
	* gfortran.dg/interface_assignment_1.f90 : New test.

Looks OK to me.



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