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Write L-attributed SDT's analogous to that of Example $5.19$ for the following productions, each of which represents a familiar flow-of-control construct, as in the programming language C. You may need to generate a three  address statement to jump to a particular label $L$, in which case you should generate goto $L$. 

  1. $S\rightarrow f (C) S_{1}\:else\:S_{2}$
  2. $S\rightarrow do\:S_{1}\: while\:(C)$
  3. $S\rightarrow '\{'L'\}';\:L\rightarrow LS\mid \epsilon$

Note that any statement in the list can have a jump from its middle to the next statement, so it is not sufficient simply to generate code for each statement in order. 

in Compiler Design by Veteran (59.3k points) | 21 views

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