The IA-64 back end supports the following variable attribute:
model (model-name) ¶On IA-64, use this attribute to set the addressability of an object.
At present, the only supported identifier for model-name is
small, indicating addressability via “small” (22-bit)
addresses (so that their addresses can be loaded with the addl
instruction). Caveat: such addressing is by definition not position
independent and hence this attribute must not be used for objects
defined by shared libraries.