Which of the following is a type of a out-of-order execution, with the reordering done by a compiler
(A) loop unrolling
(B) dead code elimination
(C) strength reduction
(D) software pipelining


Answer: (D)

Explanation: Software Pipelining is a technique used to optimize loops, in a manner that parallels hardware pipelining. Software pipelining is a type of out-of-order execution, except that the reordering is done by a compiler instead of the processor.

Option (D) is correct.

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