Method for inserting a path instruction during compliation of computer programs for processors having multiple functional units

A method is provided for inserting a path instruction during compilation of computer programs for a processor having multiple functional resources. A path instruction is inserted in the order of object code instruction during the reordering of the instructions in response to a simulation of the run-time environment of the target machine to direct that the path of execution for a subsequent object code instruction be in accordance with an optimum path of execution for the object code instruction as determined by the simulation is different than a preselected default path of execution for an object code instruction for a similar type of object code operation.