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328 lines
10 KiB
ObjectPascal
328 lines
10 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 2000 by Florian Klaempfl
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This unit implements some basic nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ncgbas;
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{$i defines.inc}
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interface
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uses
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node,nbas;
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type
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tcgnothingnode = class(tnothingnode)
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procedure pass_2;override;
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end;
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tcgasmnode = class(tasmnode)
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procedure pass_2;override;
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end;
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tcgstatementnode = class(tstatementnode)
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procedure pass_2;override;
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end;
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tcgblocknode = class(tblocknode)
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procedure pass_2;override;
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end;
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tcgtempcreatenode = class(ttempcreatenode)
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procedure pass_2;override;
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end;
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tcgtemprefnode = class(ttemprefnode)
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procedure pass_2;override;
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end;
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tcgtempdeletenode = class(ttempdeletenode)
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procedure pass_2;override;
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end;
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implementation
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uses
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globtype,systems,
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cutils,cclasses,verbose,globals,
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aasm,symconst,symsym,symtable,types,
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htypechk,
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cpubase,cpuasm,
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nflw,pass_2,
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cgbase,
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cga,
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tgcpu,temp_gen
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;
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{*****************************************************************************
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TNOTHING
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*****************************************************************************}
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procedure tcgnothingnode.pass_2;
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begin
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{ avoid an abstract rte }
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end;
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{*****************************************************************************
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TSTATEMENTNODE
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*****************************************************************************}
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procedure tcgstatementnode.pass_2;
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var
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hp : tnode;
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begin
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hp:=self;
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while assigned(hp) do
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begin
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if assigned(tstatementnode(hp).right) then
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begin
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cleartempgen;
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secondpass(tstatementnode(hp).right);
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end;
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hp:=tstatementnode(hp).left;
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end;
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end;
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{*****************************************************************************
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TASMNODE
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*****************************************************************************}
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procedure tcgasmnode.pass_2;
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procedure ReLabel(var p:tasmsymbol);
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begin
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if p.proclocal then
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begin
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if not assigned(p.altsymbol) then
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begin
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{ generatealtsymbol will also increase the refs }
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p.GenerateAltSymbol;
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UsedAsmSymbolListInsert(p);
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end
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else
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begin
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{ increase the refs, they will be decreased when the
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asmnode is destroyed }
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inc(p.refs);
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end;
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p:=p.altsymbol;
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end;
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end;
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var
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hp,hp2 : tai;
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localfixup,parafixup,
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i : longint;
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skipnode : boolean;
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begin
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if inlining_procedure then
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begin
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CreateUsedAsmSymbolList;
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localfixup:=aktprocdef.localst.address_fixup;
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parafixup:=aktprocdef.parast.address_fixup;
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hp:=tai(p_asm.first);
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while assigned(hp) do
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begin
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hp2:=tai(hp.getcopy);
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skipnode:=false;
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case hp2.typ of
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ait_label :
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begin
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{ regenerate the labels by setting altsymbol }
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ReLabel(tasmsymbol(tai_label(hp2).l));
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end;
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ait_const_rva,
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ait_const_symbol :
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begin
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ReLabel(tai_const_symbol(hp2).sym);
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end;
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ait_instruction :
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begin
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{ fixup the references }
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for i:=1 to taicpu(hp2).ops do
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begin
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with taicpu(hp2).oper[i-1] do
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begin
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case typ of
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top_ref :
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begin
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case ref^.options of
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ref_parafixup :
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ref^.offsetfixup:=parafixup;
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ref_localfixup :
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ref^.offsetfixup:=localfixup;
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end;
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if assigned(ref^.symbol) then
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ReLabel(ref^.symbol);
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end;
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top_symbol :
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begin
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ReLabel(sym);
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end;
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end;
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end;
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end;
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end;
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ait_marker :
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begin
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{ it's not an assembler block anymore }
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if (tai_marker(hp2).kind in [AsmBlockStart, AsmBlockEnd]) then
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skipnode:=true;
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end;
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else
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end;
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if not skipnode then
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exprasmList.concat(hp2)
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else
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hp2.free;
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hp:=tai(hp.next);
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end;
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{ restore used symbols }
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UsedAsmSymbolListResetAltSym;
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DestroyUsedAsmSymbolList;
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end
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else
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begin
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{ if the routine is an inline routine, then we must hold a copy
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because it can be necessary for inlining later }
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if (aktprocdef.proccalloption=pocall_inline) then
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exprasmList.concatlistcopy(p_asm)
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else
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exprasmList.concatlist(p_asm);
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end;
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if not (nf_object_preserved in flags) then
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maybe_loadself;
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end;
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{*****************************************************************************
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TBLOCKNODE
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*****************************************************************************}
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procedure tcgblocknode.pass_2;
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begin
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{ do second pass on left node }
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if assigned(left) then
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secondpass(left);
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end;
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{*****************************************************************************
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TTEMPCREATENODE
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*****************************************************************************}
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procedure tcgtempcreatenode.pass_2;
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begin
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{ if we're secondpassing the same tcgtempcreatenode twice, we have a bug }
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if tempinfo^.valid then
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internalerror(200108222);
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{ get a (persistent) temp }
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if persistent then
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gettempofsizereferencepersistant(size,tempinfo^.ref)
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else
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gettempofsizereference(size,tempinfo^.ref);
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tempinfo^.valid := true;
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end;
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{*****************************************************************************
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TTEMPREFNODE
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*****************************************************************************}
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procedure tcgtemprefnode.pass_2;
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begin
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{ check if the temp is valid }
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if not tempinfo^.valid then
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internalerror(200108231);
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{ set the temp's location }
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location.loc := LOC_REFERENCE;
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location.reference := tempinfo^.ref;
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end;
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{*****************************************************************************
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TTEMPDELETENODE
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*****************************************************************************}
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procedure tcgtempdeletenode.pass_2;
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begin
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ungetpersistanttempreference(tempinfo^.ref);
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end;
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begin
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cnothingnode:=tcgnothingnode;
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casmnode:=tcgasmnode;
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cstatementnode:=tcgstatementnode;
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cblocknode:=tcgblocknode;
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ctempcreatenode:=tcgtempcreatenode;
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ctemprefnode:=tcgtemprefnode;
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ctempdeletenode:=tcgtempdeletenode;
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end.
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{
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$Log$
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Revision 1.9 2001-11-02 22:58:01 peter
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* procsym definition rewrite
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Revision 1.8 2001/10/25 21:22:35 peter
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* calling convention rewrite
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Revision 1.7 2001/08/26 13:36:39 florian
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* some cg reorganisation
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* some PPC updates
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Revision 1.6 2001/08/24 13:47:27 jonas
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* moved "reverseparameters" from ninl.pas to ncal.pas
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+ support for non-persistent temps in ttempcreatenode.create, for use
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with typeconversion nodes
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Revision 1.5 2001/08/23 14:28:35 jonas
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+ tempcreate/ref/delete nodes (allows the use of temps in the
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resulttype and first pass)
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* made handling of read(ln)/write(ln) processor independent
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* moved processor independent handling for str and reset/rewrite-typed
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from firstpass to resulttype pass
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* changed names of helpers in text.inc to be generic for use as
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compilerprocs + added "iocheck" directive for most of them
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* reading of ordinals is done by procedures instead of functions
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because otherwise FPC_IOCHECK overwrote the result before it could
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be stored elsewhere (range checking still works)
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* compilerprocs can now be used in the system unit before they are
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implemented
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* added note to errore.msg that booleans can't be read using read/readln
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Revision 1.4 2001/06/02 19:22:15 peter
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* refs count for relabeled asmsymbols fixed
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Revision 1.3 2001/05/18 22:31:06 peter
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* tasmnode.pass_2 is independent of cpu, moved to ncgbas
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* include ncgbas for independent nodes
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Revision 1.2 2001/04/13 01:22:08 peter
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* symtable change to classes
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* range check generation and errors fixed, make cycle DEBUG=1 works
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* memory leaks fixed
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Revision 1.1 2000/10/14 10:14:50 peter
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* moehrendorf oct 2000 rewrite
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}
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