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The machine independent optimiser operates on

  • A.the raw character stream of the original source program
  • B.the target assembly code after registers have been allocated
  • C.the symbol table alone without reference to any code
  • D.the intermediate representation of the program

Answer: D

Machine independent optimisation is placed after intermediate code generation and before code generation precisely so that it can improve the program without knowing anything about the target instruction set or register file.

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