Example .
The six temporaries in the basic block can be packed into two locations. These locations correspond to t 1 and t 2 in:
1: t 1 = a * a
2: t 2 = a * b
3: t2 = 2 * t2
4: t1 = t 1 + t2
5: t2 = b * b
6: t1 = t1 + t 2
7: X = t1
