Intermediate
Compilers & Programming Language Theory
Q64 / 100
What problem does common subexpression elimination (CSE) solve?
Correct! Well done.
Incorrect.
The correct answer is C) It detects expressions that compute the same value more than once and replaces the redundant computations with a reference to the first result
C
Correct Answer
It detects expressions that compute the same value more than once and replaces the redundant computations with a reference to the first result
Explanation
CSE finds expressions like a*b appearing in multiple places whose operands have not changed between occurrences, computes the value once, and reuses it — reducing redundant arithmetic, memory loads, or function calls.
Progress
64/100