Method for processing user program on a parallel computer system by inserting a tag during compiling

A method of processing an application program on a parallel-computer system, comprising the steps of:

• a) processing individual processes on different computers in the parallel-computer system,
• b) reading in code of the application program,
• c) establishing, during compiling of the application program, for each instruction, based on a list in which is specified when execution of an instruction requires an access to a data item, if execution thereof requires an access to a data item,
• d) entering as characteristic information for these instructions in a symbol table whether data
• d1) has already been written in a current process,
• d2) can be executed in parallel and has already been calculated if the current process requires the data,
• d3) can be executed in parallel and possibly has not yet been calculated if the current process requires the data,
• e) providing, in the compiled program, instructions for which case d1) applies with a first tagging sign, and instructions for which case d3) applies with a second tagging sign,
• f) tagging a result of an executed instruction according to characteristic information thereof and entering a result variable with the characteristic information in the symbol table.