Just in time compilation using link time optimization

A system comprising:

• one or more central processing units (CPUs), executing instructions, to:
• generate a merged intermediate representation of at least a portion of source code implementing an application, wherein the merged intermediate representation includes intermediate representations comprising parameterized functions, wherein parameterized functions are generated using a compiler before run-time or at run-time prior to the merging;
• identify one or more function calls within the merged intermediate representation that are to be performed conditionally based on application parameters at runtime;
• determine, at run-time and based on evaluating values of application parameters, one or more functions to be called by the one or more function calls;
• replace the one or more function calls with one or more sets of executable instructions implementing the one or more functions, wherein to replace, at the run-time and based on the run-time values of application parameters, the one or more function calls, the one or more CPUs are to:
• identify, within the merged intermediate representation, the one or more sets of executable instructions implementing the one or more functions;
• and
• replace the one or more function calls with a copy of the one or more sets of executable instructions implementing the one or more functions.

A processing device comprising:

• computer executable instruction stored in a memory which are executed by one or more processing units to:
• generate a merged intermediate representation that includes intermediate representations comprising parameterized functions, wherein parameterized functions are generated using a compiler before run-time or at run-time prior to the merging and corresponds to at least a portion of source code implementing an application, to identify one or more function calls within the merged intermediate representation that are to be performed conditionally based on application parameters at run-time, to determine, at run-time and based on evaluating values of application parameters, one or more functions to be called by the one or more function calls, and to replace the one or more function calls with one or more sets of executable instructions implementing the one or more functions, wherein to replace the one or more function calls with the one or more sets of executable instructions, the one or more processing units are to:
• identify, within the merged intermediate representation, the one or more sets of executable instructions implementing the one or more functions;
• and
• replace the one or more function calls with a copy of the one or more sets of executable instructions implementing the one or more functions.