When a function returns a managed record, a new temporary object is
created for the result, which is then copied to the real destination.
For managed records with a deep copy implementation, this can create
immense overhead. So instead this introduces a move, which basically
consists of
```pascal
procedure Move(var src, dst);
begin
Finalize(dst); // Finalize existing data
Move(src,dst,sizeof(dst)); // Shallow copy
Initialize(src); // Clear source
```
* nld.pas: use MOVE when assigning the function result from the
temporary return object
* rtl/inc/systemh.pas: Adding new macro to mark new RTTI version with MOVE
operation
* rtl/inc/compproc.inc, rtl/inc/rtti.inc: Adding new move mechanism when
indicated by the compiler.
Extend dead code detection to not only look for the main mangled name, but also
for any aliases before deciding that a routine has been dead-stripped.
Assume objects/classes can also be constructed if the address of one of their
constructors or of the TObject.NewInstance class method has been taken.
Resolves#40204
The main adjustments were as follows:
- fixing coding style and identation
- fixing some typos
- using a better name for the property in tcallcandidates which holds the symbols created for anonymous parameter values
- Do not remove the $parentfp parameter as was done in the previous optimization approach. Instead when $parentfp is unused to the following:
- On the caller side: Omit passing the value for $parentfp for targets where tcgcallparanode.push_zero_sized_value_para=false (classic CPU targets).
Pass 0/nil as $parentfp for targets where tcgcallparanode.push_zero_sized_value_para=true;
- On the callee side: Prevent allocation of registers/resources for $parentfp.
- When possible keep $parentfp in a register.
- Set the pio_nested_access flag in tprocinfo.set_needs_parentfp() to properly handle deep nesting levels;
git-svn-id: trunk@45436 -
that expects an open array of byte, and use it for all sets
o since all sets need to be typecasted to an array type of the appropriate
size, we'll get a compilation error in case this needs to be done and
that also tells us at the same time that the ppu version will need to
be increased
* enabled {$packset 1} for the compiler, as this is now safe with the above
changes
git-svn-id: trunk@43407 -
Allows compilation of compiler using -dDEBUG_NODE_XML
which will generate a NAME-node-dump.xml file for each
unit, program or library compiled,
containing a XML description of the nodes handled during
compilation of the unit, program or library.
git-svn-id: trunk@42271 -
o unsetting po_inline while parsing the implementation for various reasons
(interprocedural goto/label, accessing a local in a parent frame,
having nested procedures)
o instead handle this via the pio_inline_not_possible flag
o noreturn can no longer be specified only in the implementation
git-svn-id: trunk@40789 -
* compinnr.inc include file converted to a unit
* inline number field size stored in ppu increased from byte to longint
* inlines in the parse tree (when written with the -vp option) now printed with
their enum name, instead of number
git-svn-id: trunk@36174 -
