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f2f6449e6b
fpc/compiler/ncgmem.pas
peter 5e7a1e3729 * removed unused units 
* use tlocation.size in cg.a_*loc*() routines
2002-04-04 19:05:54 +00:00

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{
$Id$
Copyright (c) 1998-2000 by Florian Klaempfl
Generate assembler for memory related nodes which are
the same for all (most?) processors
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit ncgmem;
{$i defines.inc}
interface
uses
node,nmem;
type
tcgloadvmtnode = class(tloadvmtnode)
procedure pass_2;override;
end;
tcghnewnode = class(thnewnode)
procedure pass_2;override;
end;
tcghdisposenode = class(thdisposenode)
procedure pass_2;override;
end;
tcgaddrnode = class(taddrnode)
procedure pass_2;override;
end;
tcgdoubleaddrnode = class(tdoubleaddrnode)
procedure pass_2;override;
end;
tcgderefnode = class(tderefnode)
procedure pass_2;override;
end;
tcgsubscriptnode = class(tsubscriptnode)
procedure pass_2;override;
end;
tcgselfnode = class(tselfnode)
procedure pass_2;override;
end;
tcgwithnode = class(twithnode)
procedure pass_2;override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symdef,symsym,aasm,
cginfo,cgbase,pass_2,
nld,ncon,nadd,
cpubase,cgobj,cgcpu,
tgobj,rgobj
{$ifdef GDB}
{$ifdef delphi}
,sysutils
{$else}
,strings
{$endif}
,cga
,symbase
,gdb
{$endif GDB}
;
{*****************************************************************************
TCGLOADNODE
*****************************************************************************}
procedure tcgloadvmtnode.pass_2;
begin
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getregisterint(exprasmlist);
cg.a_load_sym_ofs_reg(exprasmlist,
newasmsymbol(tobjectdef(tclassrefdef(resulttype.def).pointertype.def).vmt_mangledname),
0,location.register);
end;
{*****************************************************************************
TCGHNEWNODE
*****************************************************************************}
procedure tcghnewnode.pass_2;
begin
end;
{*****************************************************************************
TCGHDISPOSENODE
*****************************************************************************}
procedure tcghdisposenode.pass_2;
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
secondpass(left);
if codegenerror then
exit;
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.index := rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,left.location.register,
location.reference.index);
end
else
location.reference.index := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.index:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.index);
end;
else
internalerror(2002032217);
end;
end;
{*****************************************************************************
TCGADDRNODE
*****************************************************************************}
procedure tcgaddrnode.pass_2;
begin
secondpass(left);
{ when loading procvar we do nothing with this node, so load the
location of left }
if nf_procvarload in flags then
begin
location_copy(location,left.location);
exit;
end;
location_release(exprasmlist,left.location);
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getaddressregister(exprasmlist);
{@ on a procvar means returning an address to the procedure that
is stored in it.}
{ yes but left.symtableentry can be nil
for example on self !! }
{ symtableentry can be also invalid, if left is no tree node }
if (m_tp_procvar in aktmodeswitches) and
(left.nodetype=loadn) and
assigned(tloadnode(left).symtableentry) and
(tloadnode(left).symtableentry.typ=varsym) and
(tvarsym(tloadnode(left).symtableentry).vartype.def.deftype=procvardef) then
cg.a_load_ref_reg(exprasmlist,OS_ADDR,left.location.reference,
location.register)
else
cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,
location.register);
end;
{*****************************************************************************
TCGDOUBLEADDRNODE
*****************************************************************************}
procedure tcgdoubleaddrnode.pass_2;
begin
secondpass(left);
location_release(exprasmlist,left.location);
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getaddressregister(exprasmlist);
cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,
location.register);
end;
{*****************************************************************************
TCGDEREFNODE
*****************************************************************************}
procedure tcgderefnode.pass_2;
begin
secondpass(left);
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.base := rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,left.location.register,
location.reference.base);
end
else
location.reference.base := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.base);
end;
end;
{ still needs generic checkpointer() support! }
end;
{*****************************************************************************
TCGSUBSCRIPTNODE
*****************************************************************************}
procedure tcgsubscriptnode.pass_2;
begin
secondpass(left);
if codegenerror then
exit;
{ classes and interfaces must be dereferenced implicit }
if is_class_or_interface(left.resulttype.def) then
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,
left.location.register,location.reference.base);
end
else
location.reference.base := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.base);
end;
end;
end
else if is_interfacecom(left.resulttype.def) then
begin
tg.gettempintfcomreference(exprasmlist,location.reference);
cg.a_load_loc_ref(exprasmlist,left.location,location.reference);
end
else
location_copy(location,left.location);
inc(location.reference.offset,vs.address);
{ also update the size of the location }
location.size:=def_cgsize(resulttype.def);
end;
{*****************************************************************************
TCGSELFNODE
*****************************************************************************}
procedure tcgselfnode.pass_2;
begin
rg.getexplicitregisterint(exprasmlist,SELF_POINTER);
if (resulttype.def.deftype=classrefdef) or
is_class(resulttype.def) then
begin
location_reset(location,LOC_CREGISTER,OS_ADDR);
location.register:=SELF_POINTER;
end
else
begin
location_reset(location,LOC_CREFERENCE,OS_ADDR);
location.reference.base:=SELF_POINTER;
end;
end;
{*****************************************************************************
TCGWITHNODE
*****************************************************************************}
procedure tcgwithnode.pass_2;
var
tmpreg: tregister;
usetemp,with_expr_in_temp : boolean;
{$ifdef GDB}
withstartlabel,withendlabel : tasmlabel;
pp : pchar;
mangled_length : longint;
const
withlevel : longint = 0;
{$endif GDB}
begin
if assigned(left) then
begin
secondpass(left);
{$ifdef i386}
if (left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) and
(left.location.reference.segment<>R_NO) then
message(parser_e_no_with_for_variable_in_other_segments);
{$endif i386}
reference_reset(withreference);
usetemp:=false;
if (left.nodetype=loadn) and
(tloadnode(left).symtable=aktprocdef.localst) then
begin
{ for locals use the local storage }
withreference:=left.location.reference;
include(flags,nf_islocal);
end
else
{ call can have happend with a property }
begin
tmpreg := cg.get_scratch_reg(exprasmlist);
usetemp:=true;
if is_class_or_interface(left.resulttype.def) then
cg.a_load_loc_reg(exprasmlist,left.location,tmpreg)
else
cg.a_loadaddr_ref_reg(exprasmlist,
left.location.reference,tmpreg);
end;
location_release(exprasmlist,left.location);
{ if the with expression is stored in a temp }
{ area we must make it persistent and shouldn't }
{ release it (FK) }
if (left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) and
tg.istemp(left.location.reference) then
begin
tg.normaltemptopersistant(left.location.reference.offset);
with_expr_in_temp:=true;
end
else
with_expr_in_temp:=false;
{ if usetemp is set the value must be in tmpreg }
if usetemp then
begin
tg.gettempofsizereference(exprasmlist,target_info.size_of_pointer,withreference);
tg.normaltemptopersistant(withreference.offset);
{ move to temp reference }
cg.a_load_reg_ref(exprasmlist,OS_ADDR,tmpreg,withreference);
cg.free_scratch_reg(exprasmlist,tmpreg);
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
begin
inc(withlevel);
getaddrlabel(withstartlabel);
getaddrlabel(withendlabel);
emitlab(withstartlabel);
withdebugList.concat(Tai_stabs.Create(strpnew(
'"with'+tostr(withlevel)+':'+tostr(symtablestack.getnewtypecount)+
'=*'+tstoreddef(left.resulttype.def).numberstring+'",'+
tostr(N_LSYM)+',0,0,'+tostr(withreference.offset))));
mangled_length:=length(aktprocdef.mangledname);
getmem(pp,mangled_length+50);
strpcopy(pp,'192,0,0,'+withstartlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),aktprocdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
end;
{$endif GDB}
end;
{ right can be optimize out !!! }
if assigned(right) then
secondpass(right);
if usetemp then
begin
tg.ungetpersistanttemp(exprasmlist,withreference.offset);
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
begin
emitlab(withendlabel);
strpcopy(pp,'224,0,0,'+withendlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),aktprocdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
freemem(pp,mangled_length+50);
dec(withlevel);
end;
{$endif GDB}
end;
if with_expr_in_temp then
tg.ungetpersistanttemp(exprasmlist,left.location.reference.offset);
reference_reset(withreference);
end;
end;
begin
cloadvmtnode:=tcgloadvmtnode;
chnewnode:=tcghnewnode;
chdisposenode:=tcghdisposenode;
caddrnode:=tcgaddrnode;
cdoubleaddrnode:=tcgdoubleaddrnode;
cderefnode:=tcgderefnode;
csubscriptnode:=tcgsubscriptnode;
cselfnode:=tcgselfnode;
cwithnode:=tcgwithnode;
end.
{
$Log$
Revision 1.6 2002-04-04 19:05:57 peter
* removed unused units
* use tlocation.size in cg.a_*loc*() routines
Revision 1.5 2002/04/02 17:11:28 peter
* tlocation,treference update
* LOC_CONSTANT added for better constant handling
* secondadd splitted in multiple routines
* location_force_reg added for loading a location to a register
of a specified size
* secondassignment parses now first the right and then the left node
(this is compatible with Kylix). This saves a lot of push/pop especially
with string operations
* adapted some routines to use the new cg methods
Revision 1.4 2002/03/31 20:26:34 jonas
+ a_loadfpu_* and a_loadmm_* methods in tcg
* register allocation is now handled by a class and is mostly processor
independent (+rgobj.pas and i386/rgcpu.pas)
* temp allocation is now handled by a class (+tgobj.pas, -i386\tgcpu.pas)
* some small improvements and fixes to the optimizer
* some register allocation fixes
* some fpuvaroffset fixes in the unary minus node
* push/popusedregisters is now called rg.save/restoreusedregisters and
(for i386) uses temps instead of push/pop's when using -Op3 (that code is
also better optimizable)
* fixed and optimized register saving/restoring for new/dispose nodes
* LOC_FPU locations now also require their "register" field to be set to
R_ST, not R_ST0 (the latter is used for LOC_CFPUREGISTER locations only)
- list field removed of the tnode class because it's not used currently
and can cause hard-to-find bugs
Revision 1.3 2001/12/31 09:53:15 jonas
* changed remaining "getregister32" calls to "getregisterint"
Revision 1.2 2001/11/02 22:58:02 peter
* procsym definition rewrite
Revision 1.1 2001/09/30 16:17:17 jonas
* made most constant and mem handling processor independent
}
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