Program Summary Graphs

[Andrew Jacob Anthony Kowpak]

Can sombody please post a quick summary of what the graphs on pages 18 and
19 of lecture 18 mean. I've been through the slides and the book, and I
can't make heads or tails of them.

Thanks,
Andrew

[Kostas Kontogiannis]

Hi Andrew,

Slide 18 shows a Program Summary Graph, that outlines the input/output
procedure dependencies through parameter passing (by reference
parameters only). Double cycles indicate input/exit points, and single
circles indicate a summary of uses of the parameters in the body of the
procedure.
Slide 19, is the same, but the nodes are annotated with "use"
information, that is where the values of the variable in the node are
used from this point on.

I hope that helps,

Greetings,

Kostas Kontogiannis