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State whether the following is true or false.
A compiler can identify loops in a program without reference to the source syntax.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: C

Back edges in the flow graph reveal the loops whatever construct produced them. A loop built from conditional jumps is optimised exactly as one written with a while statement. The optimiser works from the graph and never sees the source syntax at all.

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