AUTOMATIC REPROGRAMMING WITH THE PILER SYSTEM.

摘要

The PILER System accepts a machine language program as input,and produces a program in a compiler language and a flow chart of the program. The heart of the system is an analyzer which discerns not only what a program is doing,but in many cases it determines why certain sequences of instructions are performed. To generalize the PILER system,the analyzer is isolated from the input-output phases of the translation. This allows numerous instruction interpreters to be written so that any number of computer models can serve as the source computer;and it makes possible any number of output routines for various compiler languages. Thus a very large combination of source-target computers can use the system,while only one major development effort is required for the analyzer. Other features of the system include flagging,with references to the flow chart,for program blocks which cannot be adequately expressed in the specified compiler language,and a feedback system which allows changes to the flowchart to be accepted and the program changed accordingly. (Author)