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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?

asked in Instruction pipelining by gate

1 Answer

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3 registers
answered by anonymous

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