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MCQ

A variable is called an _________ variable if its value is altered within the loop by a loop-invariant value.

Invariant

induction

strength

loop

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The compiler can make use of memory hierarchy and CPU registers.

TRUE

FALSE

Can be true or false

Can not say

Discussion

MCQ

Peephole optimization is form of------

Loop optimization

Local optimization

Constant folding

Data flow analysis

Discussion

MCQ

Consider the following intermediate program in three address codep = a - b
q = p * c
p = u * v
q = p + q
Which one of the following corresponds to a static single assignment form of the above code?

p1 = a - b
q1 = p1 * c
p1 = u * c
q1 = p1 + q1

p3 = a - b
q4 = p3 * c
p4 = u * c
q5 = p4 + q4

p1 = a - b
q1 = p2 * c
p3 = u * c
q2 = p4 + q3

p1 = a - b
q1 = p * c
p2 = u * c
q2 = p + q

Discussion

MCQ

A variable is called an _________ variable if its value is altered within the loop by a loop-invariant value.

Invariant

induction

strength

loop

Discussion

MCQ

Which of the following comment about peep-hole optimization is true?

It is applied to small part of the code and applied repeatedly

It can be used to optimize intermediate code

It can be applied to a portion of the code that is not contiguous

It is applied in symbol table to optimize the memory requirements

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