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Write $3$ address intermediate code (quadruples) for the following boolean expression in the sequence as it would be generated by a compiler. Partial evaluation of boolean expressions is not permitted. Assume the usual rules of precedence of the operators.

$$(a+b) > (c+d) \text{ or } a > c \text{ and }b < d$$
asked in Compiler Design by Veteran (77.7k points)   | 218 views

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Each instruction in quadruples presentation is divided into four fields: operator, arg1, arg2, and result. The above example is represented below in quadruples format:

(a+b)>(c+d)OR a>c AND b<d

(t1>t2)OR a>c AND b<d

t3 OR t4 AND t5

t3 OR t6

--------------------

t1= a+b

t2= c+d

t3= t1>t2

t4= a>c

t5= b<d

t6= t4 AND t5

t7 =t3 OR t6

Op arg1 arg2 Result
+ a b t1
+ c d t2
> t1 t2 t3
.> a c t4
< b d t5
AND t4 t5 t6
OR t3 t6 t7

 

answered by Veteran (42k points)  
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