[Patch, fortran] PR20541 - allocatable components (TR15541)

[Paul Thomas]

Tobias,

>
> Out of curiousity, why didn't you use alloca instead of doing all 
> this  bookkeeping?  Maybe because you would have needed bookkeeping 
> anyway  for the case where the allocatable component would have been 
> >  -fmax-stack-var-size?  Or is there a simpler reason?

Ignorance.

Having looked at the spec. for alloca, you are right, we would have had 
to branch for >  -fmax-stack-var-size; otherwise the warnings in the gcc 
manual would hold good.  I will put a TODO in the code somewhere.

It would simplify the code considerably - take a look for some of the 
testcases!

Good idea

Thanks