Question

The program below uses six temporary variables a, b, c, d, e, f. a = 1 b = 10 c = 20 d = a + b e = c + d f = c + e b=c+e e = b + f d = 5 + e return d + f Assuming that all operations take their operands from registers, what is the minimum number of registers needed to execute this program without sp

Accepted Answer

3