Method of producing object program based on interprocedural data

Details Method of producing object program based on interprocedural data Method of producing object program based on interprocedural data

1988-11-02

1992-09-08

Chan, Eddie P.

Boots, shoes, and leggings

364DIG1, 364280, 3642804, 3642805, 36423222, G06F 945

Patent

active

051465949

ABSTRACT:
A method of producing an object program from an inputted source program with a compiler using a computer, includes the steps of: performing an interprocedural dataflow analysis of a variable associated with a procedure such as a subroutine, function, and initialization subprogram; analyzing and summarizing a procedure call effect into a variable region having a possibility of modifying the value of a variable upon a procedure call, a variable region having a possibility of using the value of a variable, and a variable region having a necessity of defining the value of a variable, in accordance with the interprocedural dataflow analysis; and representing data reference at the procedure call by using the summary information, in the dataflow analysis of a procedure part including the procedure call, performing an interprocedural dataflow analysis while discriminating between a case where there is a possibility of data reference and a case where there is a necessity of data reference, and performing an optimization process in accordance with the result of the last-mentioned interprocedural dataflow analysis.

REFERENCES:
patent: 4710872 (1987-12-01), Scarborough
patent: 4773007 (1988-09-01), Kanada et al.
patent: 4821181 (1989-04-01), Iwasawa
patent: 4833606 (1987-05-01), Iwasawa et al.
patent: 4847755 (1987-07-01), Morrison et al.
Remi Triolet, et al., "Direct Parallelization of Call Statements", Proceedings of the SIGPLAN 86 Symposium on Compiler Construction, SIGPLAN Notices vol. 21, No. 7, Jul., 1986, pp. 176-185.
Brian Brode, "Precompilation of Fortran Programs to Facilitate Array Processing," 1981 IEEE Computer, pp. 46-51.

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