tree
gfc_build_array_ref (tree base, tree offset, tree decl)
{
tree type = TREE_TYPE (base);
tree tmp;
gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
type = TREE_TYPE (type);
if (DECL_P (base))
TREE_ADDRESSABLE (base) = 1;
/* Strip NON_LVALUE_EXPR nodes. */
STRIP_TYPE_NOPS (offset);
/* If the array reference is to a pointer, whose target contains a
subreference, use the span that is stored with the backend decl
and reference the element with pointer arithmetic. */
if (decl && (TREE_CODE (decl) == FIELD_DECL
|| TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == PARM_DECL)
&& GFC_DECL_SUBREF_ARRAY_P (decl)
&& !integer_zerop (GFC_DECL_SPAN(decl)))
{
offset = fold_build2_loc (input_location, MULT_EXPR,
gfc_array_index_type,
offset, GFC_DECL_SPAN(decl));
tmp = gfc_build_addr_expr (pvoid_type_node, base);
tmp = fold_build2_loc (input_location, POINTER_PLUS_EXPR,
pvoid_type_node, tmp,
fold_convert (sizetype, offset));
tmp = fold_convert (build_pointer_type (type), tmp);
if (!TYPE_STRING_FLAG (type))
tmp = build_fold_indirect_ref_loc (input_location, tmp);
return tmp;
}
else
/* Otherwise use a straightforward array reference. */
return build4_loc (input_location, ARRAY_REF, type, base, offset,
NULL_TREE, NULL_TREE);
}
tree
gfc_build_array_ref (tree base, tree offset, tree decl)
{
tree type = TREE_TYPE (base);
tree tmp;
tree span;
if (GFC_ARRAY_TYPE_P (type) && GFC_TYPE_ARRAY_RANK (type) == 0)
{
gcc_assert (GFC_TYPE_ARRAY_CORANK (type) > 0);
return fold_convert (TYPE_MAIN_VARIANT (type), base);
}
/* Scalar coarray, there is nothing to do. */
if (TREE_CODE (type) != ARRAY_TYPE)
{
gcc_assert (decl == NULL_TREE);
gcc_assert (integer_zerop (offset));
return base;
}
type = TREE_TYPE (type);
if (DECL_P (base))
TREE_ADDRESSABLE (base) = 1;
/* Strip NON_LVALUE_EXPR nodes. */
STRIP_TYPE_NOPS (offset);
/* If the array reference is to a pointer, whose target contains a
subreference, use the span that is stored with the backend decl
and reference the element with pointer arithmetic. */
if (decl && (TREE_CODE (decl) == FIELD_DECL
|| TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == PARM_DECL)
&& ((GFC_DECL_SUBREF_ARRAY_P (decl)
&& !integer_zerop (GFC_DECL_SPAN(decl)))
|| GFC_DECL_CLASS (decl)))
{
if (GFC_DECL_CLASS (decl))
{
/* Allow for dummy arguments and other good things. */
if (POINTER_TYPE_P (TREE_TYPE (decl)))
decl = build_fold_indirect_ref_loc (input_location, decl);
/* Check if '_data' is an array descriptor. If it is not,
the array must be one of the components of the class object,
so return a normal array reference. */
if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_class_data_get (decl))))
return build4_loc (input_location, ARRAY_REF, type, base,
offset, NULL_TREE, NULL_TREE);
span = gfc_vtable_size_get (decl);
}
else if (GFC_DECL_SUBREF_ARRAY_P (decl))
span = GFC_DECL_SPAN(decl);
else
gcc_unreachable ();
offset = fold_build2_loc (input_location, MULT_EXPR,
gfc_array_index_type,
offset, span);
tmp = gfc_build_addr_expr (pvoid_type_node, base);
tmp = fold_build_pointer_plus_loc (input_location, tmp, offset);
tmp = fold_convert (build_pointer_type (type), tmp);
if (!TYPE_STRING_FLAG (type))
tmp = build_fold_indirect_ref_loc (input_location, tmp);
return tmp;
}
else
/* Otherwise use a straightforward array reference. */
return build4_loc (input_location, ARRAY_REF, type, base, offset,
NULL_TREE, NULL_TREE);
}
