In Compiler Optimization, Operator Strength Reduction Uses Mathematical Identities to Replace

question 15

Multiple Choice

In compiler optimization, operator strength reduction uses mathematical identities to replace slow math operations with faster operations. Which of the following code replacements is an illustration of operator strength reduction?

• A)Replace P + P by 2 * P or Replace 3 + 4 by 7.
• B)Replace P * 32 by P < < 5
• C)Replace P * 0 by 0
• D)Replace (P < <4) - P by P * 15

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