inlining functions

[Jan Hanselaer]

Do I understand it well that there's no function inlining at all when you 
compile without the -inline parameter?

And that the compiler chooses which functions to inline when you compile 
with the -inline parameter?
And if so, anyone knows what the exact criteria are? I read something like 
no inlining when there's a loop in the function, but are there more 
criteria?

Greetz
Jan