Re: RPG400-L Digest V2 #363

Hmm... if it is not the RPG compiler that decides the placement, is it the
MI compiler (I assume there is one) or the run time program?

Just what is it that places the variables in such an interesting alignment?

Regards,

Jim Langston

boldt@ca.ibm.com wrote:
> 
> Peter wrote:
> >Thanks for the research Ken! Sounds like the compiler has some
> >pretty interesting logic to decide where to put data.
> 
> No, it's not the compiler that decides these things.  The exact
> placement is decided at a lower level in the system.  The compiler
> simply specifies the minimum required alignment, and in most cases,
> the compiler requests an alignment of 1 (that is, no special
> alignment).  Only when pointers are involved, or when the ALIGN
> keyword is specified on a DS with integer or unsigned subfields,
> does the compiler request 2, 4, 8, or 16 byte alignment.
> 
> As Ken pointed out, you can't really count on anything more.
> 
> Cheers!  Hans
> 
> Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com
+---
| This is the RPG/400 Mailing List!
| To submit a new message, send your mail to RPG400-L@midrange.com.
| To subscribe to this list send email to RPG400-L-SUB@midrange.com.
| To unsubscribe from this list send email to RPG400-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---