+ /* When the pointed-to type involves components of variable size,
+ care must be taken to ensure that the size evaluation code is
+ emitted early enough to dominate all the possible later uses
+ and late enough for the variables on which it depends to have
+ been assigned.
+
+ This is expected to happen automatically when the pointed-to
+ type has a name/declaration of it's own, but special attention
+ is required if the type is anonymous.
+
+ We handle the NORMAL and FIELD contexts here by attaching an
+ artificial TYPE_DECL to such pointed-to type. This forces the
+ sizes evaluation at a safe point and ensures it is not deferred
+ until e.g. within a deeper conditional context.
+
+ We expect nothing to be needed here for PARM or TYPENAME.
+ Pushing a TYPE_DECL at this point for TYPENAME would actually
+ be incorrect, as we might be in the middle of an expression
+ with side effects on the pointed-to type size "arguments" prior
+ to the pointer declaration point and the fake TYPE_DECL in the
+ enclosing context would force the size evaluation prior to the
+ side effects. */
+
+ if (!TYPE_NAME (type)
+ && (decl_context == NORMAL || decl_context == FIELD)
+ && variably_modified_type_p (type, NULL_TREE))
+ {
+ tree decl = build_decl (TYPE_DECL, NULL_TREE, type);
+ DECL_ARTIFICIAL (decl) = 1;
+ pushdecl (decl);
+ finish_decl (decl, NULL_TREE, NULL_TREE);
+ TYPE_NAME (type) = decl;
+ }
+
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