Local Variables in Frame

. assign to consecutive locations; allow enough space for each

- may put word size object in half word boundaries

- requires two half word loads

- requires shift, or, and

. align on double word boundaries

- wastes space

- machine may allow small offsets

word boundaries - the most significant byte of the object must be located at an address whose two least significant bits are zero relative to the frame pointer

half-word boundaries - the most significant byte of the object being located at an address whose least significant bit is zero relative to the frame pointer