Method and apparatus for compiling a program incending a do-stat

Details Method and apparatus for compiling a program incending a do-stat Method and apparatus for compiling a program incending a do-stat

1992-06-09

1995-07-25

Kriess, Kevin A.

Boots, shoes, and leggings

395375, 395650, 395800, 364200, 364300, 364262, 364DIG1, 364DIG2, G06F 500, G06F 930, G06F 944, G06F 938

Patent

active

054370353

ABSTRACT:
A method and apparatus for analyzing a DO-statement to determine the type of a DO-variable and for determining whether a sign of an incrementation parameter at the time of compile can be determined are provided in a DO-loop object code generator in a compiler to select an object code generating method corresponding to the state of the DO-loop. As a result, object codes fitted to each DO-loop are generated which are so efficient as to improve the iteration count according to the ANSI standard, saving of use of registers, elimination of unnecessary calculation and the like.

REFERENCES:
patent: 4802091 (1989-01-01), Cocke et al.
patent: 4821181 (1989-04-01), Iwasawa et al.
patent: 5067068 (1991-11-01), Iwasawa et al.
patent: 5109331 (1992-04-01), Ishida et al.
patent: 5247696 (1993-09-01), Booth

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