mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 22:29:45 +01:00
788 lines
24 KiB
ObjectPascal
788 lines
24 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 2000-2002 by Florian Klaempfl
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Type checking and register allocation for set/case 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 nset;
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{$i fpcdefs.inc}
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interface
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uses
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node,globals,
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aasmbase,aasmtai,
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symppu;
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type
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pcaserecord = ^tcaserecord;
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tcaserecord = record
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{ range }
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_low,_high : TConstExprInt;
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{ only used by gentreejmp }
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_at : tasmlabel;
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{ label of instruction }
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statement : tasmlabel;
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{ is this the first of an case entry, needed to release statement
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label (PFV) }
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firstlabel : boolean;
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{ left and right tree node }
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less,greater : pcaserecord;
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end;
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tsetelementnode = class(tbinarynode)
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constructor create(l,r : tnode);virtual;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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end;
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tsetelementnodeclass = class of tsetelementnode;
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tinnode = class(tbinopnode)
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constructor create(l,r : tnode);virtual;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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end;
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tinnodeclass = class of tinnode;
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trangenode = class(tbinarynode)
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constructor create(l,r : tnode);virtual;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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end;
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trangenodeclass = class of trangenode;
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tcasenode = class(tbinarynode)
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nodes : pcaserecord;
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elseblock : tnode;
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constructor create(l,r : tnode;n : pcaserecord);virtual;
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destructor destroy;override;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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procedure ppuwrite(ppufile:tcompilerppufile);override;
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procedure derefimpl;override;
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function getcopy : tnode;override;
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procedure insertintolist(l : tnodelist);override;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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function docompare(p: tnode): boolean; override;
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end;
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tcasenodeclass = class of tcasenode;
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var
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csetelementnode : tsetelementnodeclass;
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cinnode : tinnodeclass;
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crangenode : trangenodeclass;
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ccasenode : tcasenodeclass;
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{ counts the labels }
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function case_count_labels(root : pcaserecord) : longint;
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{ searches the highest label }
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{$ifdef int64funcresok}
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function case_get_max(root : pcaserecord) : tconstexprint;
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{$else int64funcresok}
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function case_get_max(root : pcaserecord) : longint;
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{$endif int64funcresok}
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{ searches the lowest label }
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{$ifdef int64funcresok}
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function case_get_min(root : pcaserecord) : tconstexprint;
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{$else int64funcresok}
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function case_get_min(root : pcaserecord) : longint;
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{$endif int64funcresok}
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function gencasenode(l,r : tnode;nodes : pcaserecord) : tnode;
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implementation
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uses
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globtype,systems,
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verbose,
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symconst,symdef,symsym,defbase,
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htypechk,pass_1,
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ncnv,ncon,cpubase,nld,rgobj,cgbase;
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function gencasenode(l,r : tnode;nodes : pcaserecord) : tnode;
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var
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t : tnode;
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begin
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t:=ccasenode.create(l,r,nodes);
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gencasenode:=t;
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end;
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{*****************************************************************************
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TSETELEMENTNODE
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*****************************************************************************}
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constructor tsetelementnode.create(l,r : tnode);
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begin
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inherited create(setelementn,l,r);
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end;
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function tsetelementnode.det_resulttype:tnode;
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begin
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result:=nil;
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resulttypepass(left);
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if assigned(right) then
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resulttypepass(right);
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set_varstate(left,true);
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if codegenerror then
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exit;
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resulttype:=left.resulttype;
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end;
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function tsetelementnode.pass_1 : tnode;
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begin
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result:=nil;
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firstpass(left);
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if assigned(right) then
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firstpass(right);
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if codegenerror then
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exit;
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location_copy(location,left.location);
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calcregisters(self,0,0,0);
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end;
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{*****************************************************************************
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TINNODE
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*****************************************************************************}
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constructor tinnode.create(l,r : tnode);
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begin
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inherited create(inn,l,r);
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end;
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function tinnode.det_resulttype:tnode;
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{$ifdef oldset}
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type
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byteset = set of byte;
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{$endif}
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var
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t : tnode;
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pst : pconstset;
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function createsetconst(psd : tsetdef) : pconstset;
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var
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pcs : pconstset;
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pes : tenumsym;
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i : longint;
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begin
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new(pcs);
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case psd.elementtype.def.deftype of
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enumdef :
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begin
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pes:=tenumsym(tenumdef(psd.elementtype.def).firstenum);
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while assigned(pes) do
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begin
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{$ifdef oldset}
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pcs^[pes.value div 8]:=pcs^[pes.value div 8] or (1 shl (pes.value mod 8));
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{$else}
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include(pcs^,pes.value);
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{$endif}
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pes:=pes.nextenum;
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end;
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end;
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orddef :
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begin
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for i:=torddef(psd.elementtype.def).low to torddef(psd.elementtype.def).high do
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{$ifdef oldset}
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pcs^[i div 8]:=pcs^[i div 8] or (1 shl (i mod 8));
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{$else}
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include(pcs^,i);
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{$endif}
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end;
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end;
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createsetconst:=pcs;
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end;
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begin
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result:=nil;
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resulttype:=booltype;
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resulttypepass(right);
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set_varstate(right,true);
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if codegenerror then
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exit;
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{ Convert array constructor first to set }
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if is_array_constructor(right.resulttype.def) then
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begin
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arrayconstructor_to_set(right);
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firstpass(right);
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if codegenerror then
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exit;
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end;
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if right.resulttype.def.deftype<>setdef then
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CGMessage(sym_e_set_expected);
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if (right.nodetype=typen) then
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begin
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{ we need to create a setconstn }
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pst:=createsetconst(tsetdef(ttypenode(right).resulttype.def));
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t:=csetconstnode.create(pst,ttypenode(right).resulttype);
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dispose(pst);
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right.free;
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right:=t;
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end;
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resulttypepass(left);
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set_varstate(left,true);
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if codegenerror then
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exit;
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{ type conversion/check }
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if assigned(tsetdef(right.resulttype.def).elementtype.def) then
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inserttypeconv(left,tsetdef(right.resulttype.def).elementtype);
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{ empty set then return false }
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if not assigned(tsetdef(right.resulttype.def).elementtype.def) or
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((right.nodetype = setconstn) and
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{$ifdef oldset}
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(byteset(tsetconstnode(right).value_set^) = [])) then
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{$else oldset}
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(tsetconstnode(right).value_set^ = [])) then
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{$endif oldset}
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begin
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t:=cordconstnode.create(0,booltype,false);
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resulttypepass(t);
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result:=t;
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exit;
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end;
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{ constant evaluation }
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if (left.nodetype=ordconstn) and (right.nodetype=setconstn) then
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begin
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{$ifdef oldset}
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t:=cordconstnode.create(byte(tordconstnode(left).value in byteset(tsetconstnode(right).value_set^)),
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booltype,true);
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{$else}
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t:=cordconstnode.create(byte(tordconstnode(left).value in Tsetconstnode(right).value_set^),
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booltype,true);
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{$endif}
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resulttypepass(t);
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result:=t;
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exit;
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end;
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end;
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{ Warning : This is the first pass for the generic version }
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{ the only difference is mainly the result location which }
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{ is changed, compared to the i386 version. }
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{ ALSO REGISTER ALLOC IS WRONG? }
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function tinnode.pass_1 : tnode;
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begin
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result:=nil;
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location.loc:=LOC_REGISTER;
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firstpass(right);
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firstpass(left);
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if codegenerror then
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exit;
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left_right_max;
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{ this is not allways true due to optimization }
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{ but if we don't set this we get problems with optimizing self code }
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if tsetdef(right.resulttype.def).settype<>smallset then
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procinfo.flags:=procinfo.flags or pi_do_call
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else
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begin
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{ a smallset needs maybe an misc. register }
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if (left.nodetype<>ordconstn) and
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not(right.location.loc in [LOC_CREGISTER,LOC_REGISTER]) and
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(right.registers32<1) then
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inc(registers32);
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end;
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end;
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{*****************************************************************************
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TRANGENODE
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*****************************************************************************}
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constructor trangenode.create(l,r : tnode);
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begin
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inherited create(rangen,l,r);
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end;
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function trangenode.det_resulttype : tnode;
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var
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ct : tconverttype;
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begin
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result:=nil;
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resulttypepass(left);
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resulttypepass(right);
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set_varstate(left,true);
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set_varstate(right,true);
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if codegenerror then
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exit;
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{ both types must be compatible }
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if not(is_equal(left.resulttype.def,right.resulttype.def)) and
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(isconvertable(left.resulttype.def,right.resulttype.def,ct,ordconstn,false)=0) then
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CGMessage(type_e_mismatch);
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{ Check if only when its a constant set }
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if (left.nodetype=ordconstn) and (right.nodetype=ordconstn) then
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begin
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{ upper limit must be greater or equal than lower limit }
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if (tordconstnode(left).value>tordconstnode(right).value) and
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((tordconstnode(left).value<0) or (tordconstnode(right).value>=0)) then
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CGMessage(cg_e_upper_lower_than_lower);
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end;
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resulttype:=left.resulttype;
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end;
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function trangenode.pass_1 : tnode;
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begin
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result:=nil;
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firstpass(left);
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firstpass(right);
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if codegenerror then
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exit;
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left_right_max;
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location_copy(location,left.location);
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end;
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{*****************************************************************************
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Case Helpers
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*****************************************************************************}
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function case_count_labels(root : pcaserecord) : longint;
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var
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_l : longint;
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procedure count(p : pcaserecord);
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begin
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inc(_l);
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if assigned(p^.less) then
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count(p^.less);
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if assigned(p^.greater) then
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count(p^.greater);
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end;
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begin
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_l:=0;
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count(root);
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case_count_labels:=_l;
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end;
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{$ifdef int64funcresok}
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function case_get_max(root : pcaserecord) : tconstexprint;
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{$else int64funcresok}
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function case_get_max(root : pcaserecord) : longint;
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{$endif int64funcresok}
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var
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hp : pcaserecord;
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begin
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hp:=root;
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while assigned(hp^.greater) do
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hp:=hp^.greater;
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case_get_max:=hp^._high;
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end;
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{$ifdef int64funcresok}
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function case_get_min(root : pcaserecord) : tconstexprint;
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{$else int64funcresok}
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function case_get_min(root : pcaserecord) : longint;
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{$endif int64funcresok}
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var
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hp : pcaserecord;
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begin
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hp:=root;
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while assigned(hp^.less) do
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hp:=hp^.less;
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case_get_min:=hp^._low;
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end;
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procedure deletecaselabels(p : pcaserecord);
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begin
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if assigned(p^.greater) then
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deletecaselabels(p^.greater);
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if assigned(p^.less) then
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deletecaselabels(p^.less);
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dispose(p);
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end;
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function copycaserecord(p : pcaserecord) : pcaserecord;
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var
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n : pcaserecord;
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begin
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new(n);
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n^:=p^;
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if assigned(p^.greater) then
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n^.greater:=copycaserecord(p^.greater);
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if assigned(p^.less) then
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n^.less:=copycaserecord(p^.less);
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copycaserecord:=n;
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end;
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procedure ppuwritecaserecord(ppufile:tcompilerppufile;p : pcaserecord);
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var
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b : byte;
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begin
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ppufile.putexprint(p^._low);
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ppufile.putexprint(p^._high);
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ppufile.putasmsymbol(p^._at);
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ppufile.putasmsymbol(p^.statement);
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ppufile.putbyte(byte(p^.firstlabel));
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b:=0;
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if assigned(p^.greater) then
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b:=b or 1;
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if assigned(p^.less) then
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b:=b or 2;
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ppufile.putbyte(b);
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if assigned(p^.greater) then
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ppuwritecaserecord(ppufile,p^.greater);
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if assigned(p^.less) then
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ppuwritecaserecord(ppufile,p^.less);
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end;
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function ppuloadcaserecord(ppufile:tcompilerppufile):pcaserecord;
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var
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b : byte;
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p : pcaserecord;
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begin
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new(p);
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p^._low:=ppufile.getexprint;
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p^._high:=ppufile.getexprint;
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p^._at:=tasmlabel(ppufile.getasmsymbol);
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p^.statement:=tasmlabel(ppufile.getasmsymbol);
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p^.firstlabel:=boolean(ppufile.getbyte);
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b:=ppufile.getbyte;
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if (b and 1)=1 then
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p^.greater:=ppuloadcaserecord(ppufile)
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else
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p^.greater:=nil;
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if (b and 2)=2 then
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p^.less:=ppuloadcaserecord(ppufile)
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else
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p^.less:=nil;
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ppuloadcaserecord:=p;
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end;
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procedure ppuderefcaserecord(p : pcaserecord);
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begin
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objectlibrary.derefasmsymbol(p^._at);
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objectlibrary.derefasmsymbol(p^.statement);
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if assigned(p^.greater) then
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ppuderefcaserecord(p^.greater);
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if assigned(p^.less) then
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ppuderefcaserecord(p^.less);
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end;
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{*****************************************************************************
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TCASENODE
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*****************************************************************************}
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constructor tcasenode.create(l,r : tnode;n : pcaserecord);
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begin
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inherited create(casen,l,r);
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nodes:=n;
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elseblock:=nil;
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set_file_line(l);
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end;
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destructor tcasenode.destroy;
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begin
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elseblock.free;
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deletecaselabels(nodes);
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inherited destroy;
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end;
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|
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constructor tcasenode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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elseblock:=ppuloadnode(ppufile);
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nodes:=ppuloadcaserecord(ppufile);
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end;
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procedure tcasenode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppuwritenode(ppufile,elseblock);
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ppuwritecaserecord(ppufile,nodes);
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end;
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|
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procedure tcasenode.derefimpl;
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begin
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inherited derefimpl;
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if assigned(elseblock) then
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elseblock.derefimpl;
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ppuderefcaserecord(nodes);
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end;
|
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|
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function tcasenode.det_resulttype : tnode;
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begin
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result:=nil;
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resulttype:=voidtype;
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end;
|
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|
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function tcasenode.pass_1 : tnode;
|
|
var
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old_t_times : longint;
|
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hp : tbinarynode;
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begin
|
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result:=nil;
|
|
{ evalutes the case expression }
|
|
rg.cleartempgen;
|
|
firstpass(left);
|
|
set_varstate(left,true);
|
|
if codegenerror then
|
|
exit;
|
|
registers32:=left.registers32;
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
{ walk through all instructions }
|
|
|
|
{ estimates the repeat of each instruction }
|
|
old_t_times:=rg.t_times;
|
|
if not(cs_littlesize in aktglobalswitches) then
|
|
begin
|
|
rg.t_times:=rg.t_times div case_count_labels(nodes);
|
|
if rg.t_times<1 then
|
|
rg.t_times:=1;
|
|
end;
|
|
{ first case }
|
|
hp:=tbinarynode(right);
|
|
while assigned(hp) do
|
|
begin
|
|
rg.cleartempgen;
|
|
firstpass(hp.right);
|
|
|
|
{ searchs max registers }
|
|
if hp.right.registers32>registers32 then
|
|
registers32:=hp.right.registers32;
|
|
if hp.right.registersfpu>registersfpu then
|
|
registersfpu:=hp.right.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if hp.right.registersmmx>registersmmx then
|
|
registersmmx:=hp.right.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
hp:=tbinarynode(hp.left);
|
|
end;
|
|
|
|
{ may be handle else tree }
|
|
if assigned(elseblock) then
|
|
begin
|
|
rg.cleartempgen;
|
|
firstpass(elseblock);
|
|
if codegenerror then
|
|
exit;
|
|
if registers32<elseblock.registers32 then
|
|
registers32:=elseblock.registers32;
|
|
if registersfpu<elseblock.registersfpu then
|
|
registersfpu:=elseblock.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if registersmmx<elseblock.registersmmx then
|
|
registersmmx:=elseblock.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
rg.t_times:=old_t_times;
|
|
|
|
{ there is one register required for the case expression }
|
|
{ for 64 bit ints we cheat: the high dword is stored in EDI }
|
|
{ so we don't need an extra register }
|
|
if registers32<1 then registers32:=1;
|
|
end;
|
|
|
|
|
|
function tcasenode.getcopy : tnode;
|
|
|
|
var
|
|
p : tcasenode;
|
|
|
|
begin
|
|
p:=tcasenode(inherited getcopy);
|
|
if assigned(elseblock) then
|
|
p.elseblock:=elseblock.getcopy
|
|
else
|
|
p.elseblock:=nil;
|
|
if assigned(nodes) then
|
|
p.nodes:=copycaserecord(nodes)
|
|
else
|
|
p.nodes:=nil;
|
|
getcopy:=p;
|
|
end;
|
|
|
|
procedure tcasenode.insertintolist(l : tnodelist);
|
|
|
|
begin
|
|
end;
|
|
|
|
function casenodesequal(n1,n2: pcaserecord): boolean;
|
|
begin
|
|
casenodesequal :=
|
|
(not assigned(n1) and not assigned(n2)) or
|
|
(assigned(n1) and assigned(n2) and
|
|
(n1^._low = n2^._low) and
|
|
(n1^._high = n2^._high) and
|
|
{ the rest of the fields don't matter for equality (JM) }
|
|
casenodesequal(n1^.less,n2^.less) and
|
|
casenodesequal(n1^.greater,n2^.greater))
|
|
end;
|
|
|
|
|
|
function tcasenode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
casenodesequal(nodes,tcasenode(p).nodes) and
|
|
elseblock.isequal(tcasenode(p).elseblock);
|
|
end;
|
|
|
|
begin
|
|
csetelementnode:=tsetelementnode;
|
|
cinnode:=tinnode;
|
|
crangenode:=trangenode;
|
|
ccasenode:=tcasenode;
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.33 2002-09-07 12:16:03 carl
|
|
* second part bug report 1996 fix, testrange in cordconstnode
|
|
only called if option is set (also make parsing a tiny faster)
|
|
|
|
Revision 1.32 2002/08/19 19:36:44 peter
|
|
* More fixes for cross unit inlining, all tnodes are now implemented
|
|
* Moved pocall_internconst to po_internconst because it is not a
|
|
calling type at all and it conflicted when inlining of these small
|
|
functions was requested
|
|
|
|
Revision 1.31 2002/08/17 09:23:38 florian
|
|
* first part of procinfo rewrite
|
|
|
|
Revision 1.30 2002/07/23 13:19:40 jonas
|
|
* fixed evaluation of expressions with empty sets that are calculated
|
|
at compile time
|
|
|
|
Revision 1.29 2002/07/23 12:34:30 daniel
|
|
* Readded old set code. To use it define 'oldset'. Activated by default
|
|
for ppc.
|
|
|
|
Revision 1.28 2002/07/22 11:48:04 daniel
|
|
* Sets are now internally sets.
|
|
|
|
Revision 1.27 2002/07/20 11:57:55 florian
|
|
* types.pas renamed to defbase.pas because D6 contains a types
|
|
unit so this would conflicts if D6 programms are compiled
|
|
+ Willamette/SSE2 instructions to assembler added
|
|
|
|
Revision 1.26 2002/07/06 20:19:25 carl
|
|
+ generic set handling
|
|
|
|
Revision 1.25 2002/07/01 18:46:24 peter
|
|
* internal linker
|
|
* reorganized aasm layer
|
|
|
|
Revision 1.24 2002/05/18 13:34:10 peter
|
|
* readded missing revisions
|
|
|
|
Revision 1.23 2002/05/16 19:46:39 carl
|
|
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
|
|
+ try to fix temp allocation (still in ifdef)
|
|
+ generic constructor calls
|
|
+ start of tassembler / tmodulebase class cleanup
|
|
|
|
Revision 1.21 2002/05/12 16:53:08 peter
|
|
* moved entry and exitcode to ncgutil and cgobj
|
|
* foreach gets extra argument for passing local data to the
|
|
iterator function
|
|
* -CR checks also class typecasts at runtime by changing them
|
|
into as
|
|
* fixed compiler to cycle with the -CR option
|
|
* fixed stabs with elf writer, finally the global variables can
|
|
be watched
|
|
* removed a lot of routines from cga unit and replaced them by
|
|
calls to cgobj
|
|
* u32bit-s32bit updates for and,or,xor nodes. When one element is
|
|
u32bit then the other is typecasted also to u32bit without giving
|
|
a rangecheck warning/error.
|
|
* fixed pascal calling method with reversing also the high tree in
|
|
the parast, detected by tcalcst3 test
|
|
|
|
Revision 1.20 2002/04/07 13:27:50 carl
|
|
+ change unit use
|
|
|
|
Revision 1.19 2002/04/02 17:11:29 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 1.18 2002/03/31 20:26:35 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
|
|
|
|
}
|