SYNTAX ANALYSIS
ROLE OF THE PARSER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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For the rule B B1 and B2, the operation “B1.false = B.false” requires two passes as
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B1.false is not known
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B.false is not known
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Both B1.false and B.false are unknown
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None of the other options
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Explanation:
Detailed explanation-1: -Backpatching is a technique used in compiler design to delay the assignment of addresses to code or data structures until a later stage of the compilation process. This allows the compiler to generate code with placeholder addresses that are later updated or “backpatched” with the correct addresses once they are known.
Detailed explanation-2: -Backpatching technique is incorporated using three functions. Makelist(), merge() and backpatch() are the three functions carried out in two passes to generate code using backpatching. makelist(i) – This is used to create a new list containing three-address location i, and it returns a pointer to the list.
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