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decl.c (substitution_list): Rename to build_subst_list, remove unused parameter and simplify.

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* gcc-interface/decl.c (substitution_list): Rename to build_subst_list,
	remove unused parameter and simplify.
	(gnat_to_gnu_entity) <E_Record_Type>: Do not set TYPE_FIELDS.  Factor
	common predicate.  Rewrite loop for clarity.  Use GNU_TYPE directly
	as context for all discriminants.  Fix formatting nits.
	<E_Record_Subtype>: Add cosmetic 'break'.  Test Has_Discriminants
	before Discriminant_Constraint.  Adjust for above renaming.  Do not
	set GNU_TYPE more than once.
	(elaborate_entity): Test Has_Discriminants on the entity and use
	Implementation_Base_Type.
	(components_to_record): Rename component_list to gnat_component_list.
	Retrieve the _Parent field from the list.  Fix nits in comments.
	Clarify logic in loop.  Pass correct arguments to create_field_decl.

From-SVN: r148121
This commit is contained in:
Eric Botcazou 2009-06-03 10:26:20 +00:00 committed by Eric Botcazou
parent 2f2c62a01c
commit 8cd281486b
2 changed files with 196 additions and 176 deletions
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16
gcc/ada/ChangeLog
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@ -1,3 +1,19 @@
2009-06-03 Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/decl.c (substitution_list): Rename to build_subst_list,
remove unused parameter and simplify.
(gnat_to_gnu_entity) <E_Record_Type>: Do not set TYPE_FIELDS. Factor
common predicate. Rewrite loop for clarity. Use GNU_TYPE directly
as context for all discriminants. Fix formatting nits.
<E_Record_Subtype>: Add cosmetic 'break'. Test Has_Discriminants
before Discriminant_Constraint. Adjust for above renaming. Do not
set GNU_TYPE more than once.
(elaborate_entity): Test Has_Discriminants on the entity and use
Implementation_Base_Type.
(components_to_record): Rename component_list to gnat_component_list.
Retrieve the _Parent field from the list. Fix nits in comments.
Clarify logic in loop. Pass correct arguments to create_field_decl.
2009-06-02 Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/Make-lang.in: Fix formatting.

356
gcc/ada/gcc-interface/decl.c
View File

@ -121,7 +121,7 @@ enum alias_set_op
static void relate_alias_sets (tree, tree, enum alias_set_op);
static tree substitution_list (Entity_Id, Entity_Id, tree, bool);
static tree build_subst_list (Entity_Id, Entity_Id, bool);
static bool allocatable_size_p (tree, bool);
static void prepend_one_attribute_to (struct attrib **,
enum attr_type, tree, tree, Node_Id);
@ -1820,7 +1820,10 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
gnu_type = make_node (UNCONSTRAINED_ARRAY_TYPE);
if (!definition)
defer_incomplete_level++, this_deferred = true;
{
defer_incomplete_level++;
this_deferred = true;
}
/* Build the fat pointer type. Use a "void *" object instead of
a pointer to the array type since we don't have the array type
@ -2743,16 +2746,21 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
bool is_extension
= (Is_Tagged_Type (gnat_entity)
&& Nkind (record_definition) == N_Derived_Type_Definition);
bool is_unchecked_union = Is_Unchecked_Union (gnat_entity);
/* See if all fields have a rep clause. Stop when we find one
that doesn't. */
for (gnat_field = First_Entity (gnat_entity);
Present (gnat_field) && all_rep;
gnat_field = Next_Entity (gnat_field))
if ((Ekind (gnat_field) == E_Component
|| Ekind (gnat_field) == E_Discriminant)
&& No (Component_Clause (gnat_field)))
all_rep = false;
if (all_rep)
for (gnat_field = First_Entity (gnat_entity);
Present (gnat_field);
gnat_field = Next_Entity (gnat_field))
if ((Ekind (gnat_field) == E_Component
|| Ekind (gnat_field) == E_Discriminant)
&& No (Component_Clause (gnat_field)))
{
all_rep = false;
break;
}
/* If this is a record extension, go a level further to find the
record definition. Also, verify we have a Parent_Subtype. */
@ -2773,7 +2781,10 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
TYPE_PACKED (gnu_type) = (packed != 0) || has_rep;
if (!definition)
defer_incomplete_level++, this_deferred = true;
{
defer_incomplete_level++;
this_deferred = true;
}
/* If both a size and rep clause was specified, put the size in
the record type now so that it can get the proper mode. */
@ -2908,7 +2919,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
proper type... */
TREE_TYPE (gnu_get_parent) = gnu_parent;
/* ...and reference the _parent field of this record. */
/* ...and reference the _Parent field of this record. */
gnu_field_list
= create_field_decl (get_identifier
(Get_Name_String (Name_uParent)),
@ -2926,9 +2937,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
Present (gnat_field);
gnat_field = Next_Stored_Discriminant (gnat_field))
{
/* If this is a record extension and this discriminant
is the renaming of another discriminant, we've already
handled the discriminant above. */
/* If this is a record extension and this discriminant is the
renaming of another discriminant, we've handled it above. */
if (Present (Parent_Subtype (gnat_entity))
&& Present (Corresponding_Discriminant (gnat_field)))
continue;
@ -2938,53 +2948,46 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
/* Make an expression using a PLACEHOLDER_EXPR from the
FIELD_DECL node just created and link that with the
corresponding GNAT defining identifier. Then add to the
list of fields. */
corresponding GNAT defining identifier. */
save_gnu_tree (gnat_field,
build3 (COMPONENT_REF, TREE_TYPE (gnu_field),
build0 (PLACEHOLDER_EXPR,
DECL_CONTEXT (gnu_field)),
build0 (PLACEHOLDER_EXPR, gnu_type),
gnu_field, NULL_TREE),
true);
if (!Is_Unchecked_Union (gnat_entity))
if (!is_unchecked_union)
{
TREE_CHAIN (gnu_field) = gnu_field_list;
gnu_field_list = gnu_field;
}
}
/* Put the discriminants into the record (backwards), so we can
know the appropriate discriminant to use for the names of the
variants. */
TYPE_FIELDS (gnu_type) = gnu_field_list;
/* Add the listed fields into the record and finish it up. */
/* Add the fields into the record type and finish it up. */
components_to_record (gnu_type, Component_List (record_definition),
gnu_field_list, packed, definition, NULL,
false, all_rep, false,
Is_Unchecked_Union (gnat_entity));
false, all_rep, false, is_unchecked_union);
/* We used to remove the associations of the discriminants and
_Parent for validity checking, but we may need them if there's
Freeze_Node for a subtype used in this record. */
/* We used to remove the associations of the discriminants and _Parent
for validity checking but we may need them if there's a Freeze_Node
for a subtype used in this record. */
TYPE_VOLATILE (gnu_type) = Treat_As_Volatile (gnat_entity);
TYPE_BY_REFERENCE_P (gnu_type) = Is_By_Reference_Type (gnat_entity);
/* If it is a tagged record force the type to BLKmode to insure
that these objects will always be placed in memory. Do the
same thing for limited record types. */
/* If it is a tagged record force the type to BLKmode to insure that
these objects will always be put in memory. Likewise for limited
record types. */
if (Is_Tagged_Type (gnat_entity) || Is_Limited_Record (gnat_entity))
SET_TYPE_MODE (gnu_type, BLKmode);
/* Fill in locations of fields. */
annotate_rep (gnat_entity, gnu_type);
/* If there are any entities in the chain corresponding to
components that we did not elaborate, ensure we elaborate their
types if they are Itypes. */
/* If there are any entities in the chain corresponding to components
that we did not elaborate, ensure we elaborate their types if they
are Itypes. */
for (gnat_temp = First_Entity (gnat_entity);
Present (gnat_temp); gnat_temp = Next_Entity (gnat_temp))
Present (gnat_temp);
gnat_temp = Next_Entity (gnat_temp))
if ((Ekind (gnat_temp) == E_Component
|| Ekind (gnat_temp) == E_Discriminant)
&& Is_Itype (Etype (gnat_temp))
@ -3007,7 +3010,6 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
/* ... fall through ... */
case E_Record_Subtype:
/* If Cloned_Subtype is Present it means this record subtype has
identical layout to that type or subtype and we should use
that GCC type for this one. The front end guarantees that
@ -3017,34 +3019,37 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
gnu_decl = gnat_to_gnu_entity (Cloned_Subtype (gnat_entity),
NULL_TREE, 0);
maybe_present = true;
break;
}
/* Otherwise, first ensure the base type is elaborated. Then, if we are
changing the type, make a new type with each field having the
type of the field in the new subtype but having the position
computed by transforming every discriminant reference according
to the constraints. We don't see any difference between
private and nonprivate type here since derivations from types should
have been deferred until the completion of the private type. */
changing the type, make a new type with each field having the type of
the field in the new subtype but the position computed by transforming
every discriminant reference according to the constraints. We don't
see any difference between private and non-private type here since
derivations from types should have been deferred until the completion
of the private type. */
else
{
Entity_Id gnat_base_type = Implementation_Base_Type (gnat_entity);
tree gnu_base_type;
tree gnu_orig_type;
tree gnu_base_type, gnu_orig_type;
if (!definition)
defer_incomplete_level++, this_deferred = true;
{
defer_incomplete_level++;
this_deferred = true;
}
/* Get the base type initially for its alignment and sizes. But
if it is a padded type, we do all the other work with the
unpadded type. */
/* Get the base type initially for its alignment and sizes.
But if it is a padded type, we do all the other work with
the unpadded type. */
gnu_base_type = gnat_to_gnu_type (gnat_base_type);
if (TREE_CODE (gnu_base_type) == RECORD_TYPE
&& TYPE_IS_PADDING_P (gnu_base_type))
gnu_type = gnu_orig_type = TREE_TYPE (TYPE_FIELDS (gnu_base_type));
gnu_orig_type = TREE_TYPE (TYPE_FIELDS (gnu_base_type));
else
gnu_type = gnu_orig_type = gnu_base_type;
gnu_orig_type = gnu_base_type;
if (present_gnu_tree (gnat_entity))
{
@ -3052,33 +3057,29 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
break;
}
/* When the type has discriminants, and these discriminants
affect the shape of what it built, factor them in.
If we are making a subtype of an Unchecked_Union (must be an
Itype), just return the type.
We can't just use Is_Constrained because private subtypes without
discriminants of full types with discriminants with default
expressions are Is_Constrained but aren't constrained! */
/* When the subtype has discriminants and these discriminants affect
the initial shape it has inherited, factor them in. But for the
of an Unchecked_Union (it must be an Itype), just return the type.
We can't just test Is_Constrained because private subtypes without
discriminants of types with discriminants with default expressions
are Is_Constrained but aren't constrained! */
if (IN (Ekind (gnat_base_type), Record_Kind)
&& !Is_For_Access_Subtype (gnat_entity)
&& !Is_Unchecked_Union (gnat_base_type)
&& !Is_For_Access_Subtype (gnat_entity)
&& Is_Constrained (gnat_entity)
&& Stored_Constraint (gnat_entity) != No_Elist
&& Present (Discriminant_Constraint (gnat_entity)))
&& Has_Discriminants (gnat_entity)
&& Present (Discriminant_Constraint (gnat_entity))
&& Stored_Constraint (gnat_entity) != No_Elist)
{
Entity_Id gnat_field;
tree gnu_field_list = 0;
tree gnu_pos_list
= compute_field_positions (gnu_orig_type, NULL_TREE,
size_zero_node, bitsize_zero_node,
BIGGEST_ALIGNMENT);
tree gnu_subst_list
= substitution_list (gnat_entity, gnat_base_type, NULL_TREE,
definition);
tree gnu_temp;
= build_subst_list (gnat_entity, gnat_base_type, definition);
tree gnu_field_list = NULL_TREE, gnu_temp;
Entity_Id gnat_field;
gnu_type = make_node (RECORD_TYPE);
TYPE_NAME (gnu_type) = gnu_entity_name;
@ -3122,9 +3123,9 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
Present (gnat_field); gnat_field = Next_Entity (gnat_field))
if ((Ekind (gnat_field) == E_Component
|| Ekind (gnat_field) == E_Discriminant)
&& (Underlying_Type (Scope (Original_Record_Component
(gnat_field)))
== gnat_base_type)
&& Underlying_Type (Scope (Original_Record_Component
(gnat_field)))
== gnat_base_type
&& (No (Corresponding_Discriminant (gnat_field))
|| !Is_Tagged_Type (gnat_base_type)))
{
@ -3192,8 +3193,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
TREE_VALUE (gnu_temp));
/* If the position is now a constant, we can set it as the
position of the field when we make it. Otherwise, we need
to deal with it specially below. */
position of the field when we make it. Otherwise, we
need to deal with it specially below. */
if (TREE_CONSTANT (gnu_pos))
{
gnu_new_pos = bit_from_pos (gnu_pos, gnu_bitpos);
@ -3309,17 +3310,23 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
rest_of_record_type_compilation (gnu_type);
}
/* Otherwise, go down all the components in the new type and
make them equivalent to those in the base type. */
/* Otherwise, go down all the components in the new type and make
them equivalent to those in the base type. */
else
for (gnat_temp = First_Entity (gnat_entity); Present (gnat_temp);
gnat_temp = Next_Entity (gnat_temp))
if ((Ekind (gnat_temp) == E_Discriminant
&& !Is_Unchecked_Union (gnat_base_type))
|| Ekind (gnat_temp) == E_Component)
save_gnu_tree (gnat_temp,
gnat_to_gnu_field_decl
(Original_Record_Component (gnat_temp)), false);
{
gnu_type = gnu_orig_type;
for (gnat_temp = First_Entity (gnat_entity);
Present (gnat_temp);
gnat_temp = Next_Entity (gnat_temp))
if ((Ekind (gnat_temp) == E_Discriminant
&& !Is_Unchecked_Union (gnat_base_type))
|| Ekind (gnat_temp) == E_Component)
save_gnu_tree (gnat_temp,
gnat_to_gnu_field_decl
(Original_Record_Component (gnat_temp)),
false);
}
}
break;
@ -3876,10 +3883,13 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
bool has_stub = false;
int parmnum;
/* A parameter may refer to this type, so defer completion of any
incomplete types. */
if (kind == E_Subprogram_Type && !definition)
/* A parameter may refer to this type, so defer completion
of any incomplete types. */
defer_incomplete_level++, this_deferred = true;
{
defer_incomplete_level++;
this_deferred = true;
}
/* If the subprogram has an alias, it is probably inherited, so
we can use the original one. If the original "subprogram"
@ -5301,13 +5311,14 @@ elaborate_entity (Entity_Id gnat_entity)
case E_Limited_Private_Subtype:
case E_Record_Subtype_With_Private:
if (Is_Constrained (gnat_entity)
&& Has_Discriminants (Base_Type (gnat_entity))
&& Has_Discriminants (gnat_entity)
&& Present (Discriminant_Constraint (gnat_entity)))
{
Node_Id gnat_discriminant_expr;
Entity_Id gnat_field;
for (gnat_field = First_Discriminant (Base_Type (gnat_entity)),
for (gnat_field
= First_Discriminant (Implementation_Base_Type (gnat_entity)),
gnat_discriminant_expr
= First_Elmt (Discriminant_Constraint (gnat_entity));
Present (gnat_field);
@ -5439,38 +5450,33 @@ relate_alias_sets (tree gnu_new_type, tree gnu_old_type, enum alias_set_op op)
record_component_aliases (gnu_new_type);
}
/* Return a TREE_LIST describing the substitutions needed to reflect
discriminant substitutions from GNAT_SUBTYPE to GNAT_TYPE and add
them to GNU_LIST. If GNAT_TYPE is not specified, use the base type
of GNAT_SUBTYPE. The substitutions can be in any order. TREE_PURPOSE
gives the tree for the discriminant and TREE_VALUES is the replacement
value. They are in the form of operands to substitute_in_expr.
DEFINITION is as in gnat_to_gnu_entity. */
/* Return a TREE_LIST describing the substitutions needed to reflect the
discriminant substitutions from GNAT_TYPE to GNAT_SUBTYPE. They can
be in any order. TREE_PURPOSE gives the tree for the discriminant and
TREE_VALUE is the replacement value. They are in the form of operands
to substitute_in_expr. DEFINITION is true if this is for a definition
of GNAT_SUBTYPE. */
static tree
substitution_list (Entity_Id gnat_subtype, Entity_Id gnat_type,
tree gnu_list, bool definition)
build_subst_list (Entity_Id gnat_subtype, Entity_Id gnat_type, bool definition)
{
tree gnu_list = NULL_TREE;
Entity_Id gnat_discrim;
Node_Id gnat_value;
if (No (gnat_type))
gnat_type = Implementation_Base_Type (gnat_subtype);
if (Has_Discriminants (gnat_type))
for (gnat_discrim = First_Stored_Discriminant (gnat_type),
gnat_value = First_Elmt (Stored_Constraint (gnat_subtype));
Present (gnat_discrim);
gnat_discrim = Next_Stored_Discriminant (gnat_discrim),
gnat_value = Next_Elmt (gnat_value))
/* Ignore access discriminants. */
if (!Is_Access_Type (Etype (Node (gnat_value))))
gnu_list = tree_cons (gnat_to_gnu_field_decl (gnat_discrim),
elaborate_expression
(Node (gnat_value), gnat_subtype,
get_entity_name (gnat_discrim), definition,
true, false),
gnu_list);
for (gnat_discrim = First_Stored_Discriminant (gnat_type),
gnat_value = First_Elmt (Stored_Constraint (gnat_subtype));
Present (gnat_discrim);
gnat_discrim = Next_Stored_Discriminant (gnat_discrim),
gnat_value = Next_Elmt (gnat_value))
/* Ignore access discriminants. */
if (!Is_Access_Type (Etype (Node (gnat_value))))
gnu_list = tree_cons (gnat_to_gnu_field_decl (gnat_discrim),
elaborate_expression
(Node (gnat_value), gnat_subtype,
get_entity_name (gnat_discrim), definition,
true, false),
gnu_list);
return gnu_list;
}
@ -6620,12 +6626,13 @@ compare_field_bitpos (const PTR rt1, const PTR rt2)
return ret ? ret : (int) (DECL_UID (field1) - DECL_UID (field2));
}
/* Return a GCC tree for a record type given a GNAT Component_List and a chain
of GCC trees for fields that are in the record and have already been
processed. When called from gnat_to_gnu_entity during the processing of a
record type definition, the GCC nodes for the discriminants will be on
the chain. The other calls to this function are recursive calls from
itself for the Component_List of a variant and the chain is empty.
/* Translate and chain the GNAT_COMPONENT_LIST to the GNU_FIELD_LIST, set
the result as the field list of GNU_RECORD_TYPE and finish it up. When
called from gnat_to_gnu_entity during the processing of a record type
definition, the GCC nodes for the discriminants and the parent, if any,
will be on the GNU_FIELD_LIST. The other calls to this function are
recursive calls for the component list of a variant and, in this case,
GNU_FIELD_LIST is empty.
PACKED is 1 if this is for a packed record, -1 if this is for a record
with Component_Alignment of Storage_Unit, -2 if this is for a record
@ -6634,51 +6641,49 @@ compare_field_bitpos (const PTR rt1, const PTR rt2)
DEFINITION is true if we are defining this record.
P_GNU_REP_LIST, if nonzero, is a pointer to a list to which each field
with a rep clause is to be added. If it is nonzero, that is all that
should be done with such fields.
with a rep clause is to be added; in this case, that is all that should
be done with such fields.
CANCEL_ALIGNMENT, if true, means the alignment should be zeroed before
laying out the record. This means the alignment only serves to force fields
to be bitfields, but not require the record to be that aligned. This is
used for variants.
laying out the record. This means the alignment only serves to force
fields to be bitfields, but not require the record to be that aligned.
This is used for variants.
ALL_REP, if true, means a rep clause was found for all the fields. This
simplifies the logic since we know we're not in the mixed case.
DO_NOT_FINALIZE, if true, means that the record type is expected to be
modified afterwards so it will not be sent to the back-end for finalization.
modified afterwards so it will not be finalized here.
UNCHECKED_UNION, if true, means that we are building a type for a record
with a Pragma Unchecked_Union.
The processing of the component list fills in the chain with all of the
fields of the record and then the record type is finished. */
with a Pragma Unchecked_Union. */
static void
components_to_record (tree gnu_record_type, Node_Id component_list,
components_to_record (tree gnu_record_type, Node_Id gnat_component_list,
tree gnu_field_list, int packed, bool definition,
tree *p_gnu_rep_list, bool cancel_alignment,
bool all_rep, bool do_not_finalize, bool unchecked_union)
{
Node_Id component_decl;
Entity_Id gnat_field;
Node_Id variant_part;
tree gnu_our_rep_list = NULL_TREE;
tree gnu_field, gnu_last;
bool layout_with_rep = false;
bool all_rep_and_size = all_rep && TYPE_SIZE (gnu_record_type);
bool layout_with_rep = false;
Node_Id component_decl, variant_part;
tree gnu_our_rep_list = NULL_TREE;
tree gnu_field, gnu_next, gnu_last;
/* For each variable within each component declaration create a GCC field
and add it to the list, skipping any pragmas in the list. */
if (Present (Component_Items (component_list)))
for (component_decl = First_Non_Pragma (Component_Items (component_list));
/* For each component referenced in a component declaration create a GCC
field and add it to the list, skipping pragmas in the GNAT list. */
if (Present (Component_Items (gnat_component_list)))
for (component_decl
= First_Non_Pragma (Component_Items (gnat_component_list));
Present (component_decl);
component_decl = Next_Non_Pragma (component_decl))
{
gnat_field = Defining_Entity (component_decl);
Entity_Id gnat_field = Defining_Entity (component_decl);
/* If present, the _Parent field must have been created and added
as the last field to the list. */
if (Chars (gnat_field) == Name_uParent)
gnu_field = tree_last (TYPE_FIELDS (gnu_record_type));
gnu_field = tree_last (gnu_field_list);
else
{
gnu_field = gnat_to_gnu_field (gnat_field, gnu_record_type,
@ -6699,7 +6704,7 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
}
/* At the end of the component list there may be a variant part. */
variant_part = Variant_Part (component_list);
variant_part = Variant_Part (gnat_component_list);
/* We create a QUAL_UNION_TYPE for the variant part since the variants are
mutually exclusive and should go in the same memory. To do this we need
@ -6757,14 +6762,14 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
IDENTIFIER_POINTER (gnu_inner_name));
/* Set the alignment of the inner type in case we need to make
inner objects into bitfields, but then clear it out
so the record actually gets only the alignment required. */
inner objects into bitfields, but then clear it out so the
record actually gets only the alignment required. */
TYPE_ALIGN (gnu_variant_type) = TYPE_ALIGN (gnu_record_type);
TYPE_PACKED (gnu_variant_type) = TYPE_PACKED (gnu_record_type);
/* Similarly, if the outer record has a size specified and all fields
have record rep clauses, we can propagate the size into the
variant part. */
/* Similarly, if the outer record has a size specified and all
fields have record rep clauses, we can propagate the size
into the variant part. */
if (all_rep_and_size)
{
TYPE_SIZE (gnu_variant_type) = TYPE_SIZE (gnu_record_type);
@ -6772,8 +6777,8 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
= TYPE_SIZE_UNIT (gnu_record_type);
}
/* Create the record type for the variant. Note that we defer
finalizing it until after we are sure to actually use it. */
/* Add the fields into the record type for the variant. Note that we
defer finalizing it until after we are sure to really use it. */
components_to_record (gnu_variant_type, Component_List (variant),
NULL_TREE, packed, definition,
&gnu_our_rep_list, !all_rep_and_size, all_rep,
@ -6821,7 +6826,7 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
gnu_variant_list = gnu_field;
}
/* Only make the QUAL_UNION_TYPE if there are any non-empty variants. */
/* Only make the QUAL_UNION_TYPE if there are non-empty variants. */
if (gnu_variant_list)
{
int union_field_packed;
@ -6864,18 +6869,19 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
}
/* Scan GNU_FIELD_LIST and see if any fields have rep clauses. If they
do, pull them out and put them into GNU_OUR_REP_LIST. We have to do this
in a separate pass since we want to handle the discriminants but can't
play with them until we've used them in debugging data above.
do, pull them out and put them into GNU_OUR_REP_LIST. We have to do
this in a separate pass since we want to handle the discriminants but
can't play with them until we've used them in debugging data above.
??? Note: if we then reorder them, debugging information will be wrong,
but there's nothing that can be done about this at the moment. */
for (gnu_field = gnu_field_list, gnu_last = NULL_TREE; gnu_field; )
??? If we then reorder them, debugging information will be wrong but
there's nothing that can be done about this at the moment. */
gnu_last = NULL_TREE;
for (gnu_field = gnu_field_list; gnu_field; gnu_field = gnu_next)
{
gnu_next = TREE_CHAIN (gnu_field);
if (DECL_FIELD_OFFSET (gnu_field))
{
tree gnu_next = TREE_CHAIN (gnu_field);
if (!gnu_last)
gnu_field_list = gnu_next;
else
@ -6883,31 +6889,28 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
TREE_CHAIN (gnu_field) = gnu_our_rep_list;
gnu_our_rep_list = gnu_field;
gnu_field = gnu_next;
}
else
{
gnu_last = gnu_field;
gnu_field = TREE_CHAIN (gnu_field);
}
gnu_last = gnu_field;
}
/* If we have any items in our rep'ed field list, it is not the case that all
the fields in the record have rep clauses, and P_REP_LIST is nonzero,
set it and ignore the items. */
/* If we have any fields in our rep'ed field list and it is not the case that
all the fields in the record have rep clauses and P_REP_LIST is nonzero,
set it and ignore these fields. */
if (gnu_our_rep_list && p_gnu_rep_list && !all_rep)
*p_gnu_rep_list = chainon (*p_gnu_rep_list, gnu_our_rep_list);
/* Otherwise, sort the fields by bit position and put them into their own
record, before the others, if we also have fields without rep clauses. */
else if (gnu_our_rep_list)
{
/* Otherwise, sort the fields by bit position and put them into their
own record if we have any fields without rep clauses. */
tree gnu_rep_type
= (gnu_field_list ? make_node (RECORD_TYPE) : gnu_record_type);
int len = list_length (gnu_our_rep_list);
int i, len = list_length (gnu_our_rep_list);
tree *gnu_arr = (tree *) alloca (sizeof (tree) * len);
int i;
for (i = 0, gnu_field = gnu_our_rep_list; gnu_field;
for (gnu_field = gnu_our_rep_list, i = 0;
gnu_field;
gnu_field = TREE_CHAIN (gnu_field), i++)
gnu_arr[i] = gnu_field;
@ -6926,8 +6929,9 @@ components_to_record (tree gnu_record_type, Node_Id component_list,
if (gnu_field_list)
{
finish_record_type (gnu_rep_type, gnu_our_rep_list, 1, false);
gnu_field = create_field_decl (get_identifier ("REP"), gnu_rep_type,
gnu_record_type, 0, 0, 0, 1);
gnu_field
= create_field_decl (get_identifier ("REP"), gnu_rep_type,
gnu_record_type, 0, NULL_TREE, NULL_TREE, 1);
DECL_INTERNAL_P (gnu_field) = 1;
gnu_field_list = chainon (gnu_field_list, gnu_field);
}