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      Question

      If an expression `x = a + b` is computed, and later in

      the same basic block, `y = a + b` is computed, a compiler can apply which optimization?
      A Constant Propagation Correct Answer Incorrect Answer
      B Dead Code Elimination Correct Answer Incorrect Answer
      C Common Subexpression Elimination (CSE) Correct Answer Incorrect Answer
      D Loop Invariant Code Motion Correct Answer Incorrect Answer
      E Strength Reduction Correct Answer Incorrect Answer

      Solution

      Common Subexpression Elimination (CSE)

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