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GATE | GATE CS 2010 | Question 37
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 spilling?
(A)
2
(B)
3
(C)
4
(D)
6
Answer
Please comment below if you find anything wrong in the above post
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