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A further backport to 4.1


I have just backported the following bugfixes to 4.1:

2006-11-10 Paul Thomas <pault@gcc.gnu.org>

Backport from mainline.

	PR fortran/29371
	* trans-expr.c (gfc_trans_pointer_assignment): Add the expression
	for the assignment of null to the data field to se->pre, rather
	than block.

	PR fortran/29392
	* data.c (create_character_intializer): Copy and simplify
	the expressions for the start and end of a sub-string
	reference.

	PR fortran/29216
	PR fortran/29314
	* gfortran.h : Add EXEC_INIT_ASSIGN.
	* dump-parse-tree.c (gfc_show_code_node): The same.
	* trans-expr.c (gfc_trans_init_assign): New function.
	* trans-stmt.h : Add prototype for gfc_trans_init_assign.
	* trans.c (gfc_trans_code): Implement EXEC_INIT_ASSIGN.
	* resolve.c (resolve_allocate_exp): Replace EXEC_ASSIGN by
	EXEC_INIT_ASSIGN.
	(resolve_code): EXEC_INIT_ASSIGN does not need resolution.
	(apply_default_init): New function.
	(resolve_symbol): Call it for derived types that become
	defined but which do not already have an initialization
	expression..
	* st.c (gfc_free_statement): Include EXEC_INIT_ASSIGN.
	
	PR fortran/29387
	* trans-intrinsic.c (gfc_conv_intrinsic_len): Rearrange to have
	a specific case for EXPR_VARIABLE and, in default, build an ss
	to call gfc_conv_expr_descriptor for array expressions..

	PR fortran/29490
	* trans-expr.c (gfc_set_interface_mapping_bounds): In the case
	that GFC_TYPE_ARRAY_LBOUND is not available, use descriptor
	values for it and GFC_TYPE_ARRAY_UBOUND.

	PR fortran/29641
	* trans-types.c (gfc_get_derived_type): If the derived type
	namespace has neither a parent nor a proc_name, set NULL for
	the search namespace.

	PR fortran/24518
	* trans-intrinsic.c (gfc_conv_intrinsic_mod): Use built_in fmod
	for both MOD and MODULO, if it is available.

	PR fortran/29565
	* trans-expr.c (gfc_conv_aliased_arg): For an INTENT(OUT), save
	the declarations from the unused loops by merging the block
	scope for each; this ensures that the temporary is declared.

2006-11-10 Paul Thomas <pault@gcc.gnu.org>

	PR fortran/29371
	* gfortran.dg/nullify_3.f90: New test.

	PR fortran/29392
	* gfortran.dg/data_char_3.f90: New test.

	PR fortran/29216
	* gfortran.dg/result_default_init_1.f90: New test.

	PR fortran/29314
	* gfortran.dg/automatic_default_init_1.f90: New test.

	PR fortran/29387
	* trans-intrinsic.c (gfc_conv_intrinsic_len): Rearrange to have
	a specific case for EXPR_VARIABLE and, in default, build an ss
	to call gfc_conv_expr_descriptor for array expressions..

	PR fortran/29490
	* trans-expr.c (gfc_set_interface_mapping_bounds): In the case
	that GFC_TYPE_ARRAY_LBOUND is not available, use descriptor
	values for it and GFC_TYPE_ARRAY_UBOUND.

	PR fortran/29641
	* trans-types.c (gfc_get_derived_type): If the derived type
	namespace has neither a parent nor a proc_name, set NULL for
	the search namespace.

	PR fortran/29565
	* gfortran.dg/gfortran.dg/aliasing_dummy_3.f90: New test.

Paul


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