On Wed, Jun 8, 2011 at 6:17 AM, Jonas Maebe <jonas.ma...@elis.ugent.be> wrote: > > On 08 Jun 2011, at 10:57, Zaher Dirkey wrote: > >> Hi, I know when compile the project with optimize in Delphi the variable >> freed/allocated after the last line used. >> How can i make same in FPC, O3 not worked for me. > > FPC only reuses stack slots allocated for temporary expressions. It does not > reuse stack slots used by variables. > > > Jonas >
While we are at it, is this a limitation or by design? > > What if C is string or Interface of TInterfacedObject? > It is the same logic. It's freed only at the end. I recently noticed that this is also true for ansistrings. I see this can avoid lots of errors, but also makes it very ackward to intentionally avoid copies when modifying strings in-place if they are obtained from a function... -Flávio _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
