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Consider the grammar rule E → E1 - E2 for arithmetic expressions. The code generated is targeted to a CPU having a single user register. The subtraction operation requires the first operand to be in the register. If E1 and E2 do not have any common subexpression, in order to get the shortest possible code
  • a)
    E1 should be evaluated first
  • b)
    E2 should be evaluated first
  • c)
    Evaluation of E1 and E2 should necessarily be interleaved
  • d)
    Order of evaluation of E1 and E2 is of no consequence
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the grammar rule E → E1 - E2 for arithmetic expressions....
To optimize the solution evaluate the expression E2. Then we can calculate E1 and finally E1 will be one of operands that will be in register and we can perform subtraction directly. But if we follow the opposite then we have to make move and store operations.
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Consider the grammar rule E → E1 - E2 for arithmetic expressions....
Unfortunately, you haven't provided the grammar rule E. Could you please provide more information or the specific rule you would like me to consider?
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Consider the grammar rule E → E1 - E2 for arithmetic expressions. The code generated is targeted to a CPU having a single user register. The subtraction operation requires the first operand to be in the register. If E1 and E2 do not have any common subexpression, in order to get the shortest possible codea)E1 should be evaluated firstb)E2 should be evaluated firstc)Evaluation of E1 and E2 should necessarily be interleavedd)Order of evaluation of E1 and E2 is of no consequenceCorrect answer is option 'B'. Can you explain this answer?
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Consider the grammar rule E → E1 - E2 for arithmetic expressions. The code generated is targeted to a CPU having a single user register. The subtraction operation requires the first operand to be in the register. If E1 and E2 do not have any common subexpression, in order to get the shortest possible codea)E1 should be evaluated firstb)E2 should be evaluated firstc)Evaluation of E1 and E2 should necessarily be interleavedd)Order of evaluation of E1 and E2 is of no consequenceCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the grammar rule E → E1 - E2 for arithmetic expressions. The code generated is targeted to a CPU having a single user register. The subtraction operation requires the first operand to be in the register. If E1 and E2 do not have any common subexpression, in order to get the shortest possible codea)E1 should be evaluated firstb)E2 should be evaluated firstc)Evaluation of E1 and E2 should necessarily be interleavedd)Order of evaluation of E1 and E2 is of no consequenceCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the grammar rule E → E1 - E2 for arithmetic expressions. The code generated is targeted to a CPU having a single user register. The subtraction operation requires the first operand to be in the register. If E1 and E2 do not have any common subexpression, in order to get the shortest possible codea)E1 should be evaluated firstb)E2 should be evaluated firstc)Evaluation of E1 and E2 should necessarily be interleavedd)Order of evaluation of E1 and E2 is of no consequenceCorrect answer is option 'B'. Can you explain this answer?.
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