(20%) Consider the production and semantic rules for incremental translation (Ta

Question

(20%) Consider the production and semantic rules for incremental translation (Table 1). P is the start symbol. Function Temp0 returns a new name for each call. S ? ?d» E ; { gen( tog.get(id.lezerre) 'z' Eaddr); } 2. L id LE (L.array top.get(id.lereme), IL-E: genl L.addr.base 't L.addr 'T '-E.addr); E-, El + ?? { E.addr-new Temp(); ?.type L.arTuy.type.elem; ?.addr-new Tempo; gen(?.addr? ?.addr's' L.type.undth); } gen(E.addr addr'Ea.addr);) { E.addr = top.get(id.lereme); } {E.addr = new Tanp(); E Larray-L1.array ?.type= L1 type.elem; tnew Temp ?.addr= new Temp(); gen(t E.addr L.type.undth); } gen(L.addrLaddr; id IL gen(E.addr' L.array.base 't L.addr T);) Translate the following statement into the corresponding three-address code. c a[i] bljl; 1l a is an integer array. b is a char array.

Explanation / Answer

(Ans-) Given statement is:

c=a[i] + b[j];

Following is the 3-address code generation:-

T1= addr(a)

T2= i*4

T3= T1[T2]

T4= addr(b)

T5= j*4

T6= T4[T5]

T7= T4 + T6

c= T7

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