The synthesis phases

• The CODE OPTIMIZATION attempts to improve the intermediate code in order to reduce the running time and the running space of the target executable program.
• Some optimizations are trivial. In our example
  • the conversion of the integer 10 to the float 10.0 can be avoided,
  • the creation of the TEMPORARY VARIABLES temp1 and temp3 can be avoided too.
• Other optimizations require more sophisticated techniques ...
• The CODE GENERATION consists of
  • selecting memory location for each variable used by the (optimized) program
  • translating the IR into a sequence of target instructions.
• In our example
  • registers R1 and R2 are chosen,
  • the first and the second operand of each instruction specify a source and a destination, respectively.
  • the F of each instruction specifies that the instruction deals with floats
  • ...