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1445 lines
41 KiB
ObjectPascal
1445 lines
41 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Type checking and register allocation for nodes that influence
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the flow
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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 nflw;
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{$i fpcdefs.inc}
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interface
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uses
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cclasses,
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node,cpubase,
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symnot,
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symtype,symbase,symdef,symsym,
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optunrol;
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type
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{ flags used by loop nodes }
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tloopflag = (
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{ set if it is a for ... downto ... do loop }
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lnf_backward,
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{ Do we need to parse childs to set var state? }
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lnf_varstate,
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{ Do a test at the begin of the loop?}
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lnf_testatbegin,
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{ Negate the loop test? }
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lnf_checknegate,
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{ Should the value of the loop variable on exit be correct. }
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lnf_dont_mind_loopvar_on_exit);
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tloopflags = set of tloopflag;
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const
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{ loop flags which must match to consider loop nodes equal regarding the flags }
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loopflagsequal = [lnf_backward];
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type
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tlabelnode = class;
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tloopnode = class(tbinarynode)
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t1,t2 : tnode;
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loopflags : tloopflags;
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constructor create(tt : tnodetype;l,r,_t1,_t2 : tnode);virtual;
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destructor destroy;override;
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function _getcopy : tnode;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 buildderefimpl;override;
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procedure derefimpl;override;
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procedure insertintolist(l : tnodelist);override;
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procedure printnodetree(var t:text);override;
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function docompare(p: tnode): boolean; override;
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end;
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twhilerepeatnode = class(tloopnode)
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constructor create(l,r:Tnode;tab,cn:boolean);virtual;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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{$ifdef state_tracking}
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function track_state_pass(exec_known:boolean):boolean;override;
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{$endif}
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end;
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twhilerepeatnodeclass = class of twhilerepeatnode;
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tifnode = class(tloopnode)
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constructor create(l,r,_t1 : 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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tifnodeclass = class of tifnode;
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tfornode = class(tloopnode)
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{ if count isn divisable by unrolls then
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the for loop must jump to this label to get the correct
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number of executions }
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entrylabel : tnode;
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loopvar_notid:cardinal;
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constructor create(l,r,_t1,_t2 : tnode;back : boolean);virtual;
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procedure loop_var_access(not_type:Tnotification_flag;symbol:Tsym);
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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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tfornodeclass = class of tfornode;
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texitnode = class(tunarynode)
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constructor create(l:tnode);virtual;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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procedure ppuwrite(ppufile:tcompilerppufile);override;
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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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texitnodeclass = class of texitnode;
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tbreaknode = class(tnode)
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constructor create;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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tbreaknodeclass = class of tbreaknode;
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tcontinuenode = class(tnode)
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constructor create;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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tcontinuenodeclass = class of tcontinuenode;
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tgotonode = class(tnode)
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{ we still need this for resolving forward gotos }
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labelsym : tlabelsym;
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labelnode : tlabelnode;
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exceptionblock : integer;
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{ internlab : tinterngotolabel;}
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constructor create(p : tlabelnode);virtual;
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{ as long as we don't know the label node we can't resolve it }
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constructor create_sym(p : tlabelsym);virtual;
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{ constructor createintern(g:tinterngotolabel);}
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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 buildderefimpl;override;
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procedure derefimpl;override;
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function _getcopy : tnode;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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tgotonodeclass = class of tgotonode;
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tlabelnode = class(tunarynode)
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exceptionblock : integer;
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{ when copying trees, this points to the newly created copy of a label }
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copiedto : tlabelnode;
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{ contains all goto nodesrefering to this label }
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referinggotonodes : tlist;
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constructor create(l:tnode);virtual;
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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 buildderefimpl;override;
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procedure derefimpl;override;
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function _getcopy : tnode;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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tlabelnodeclass = class of tlabelnode;
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traisenode = class(tbinarynode)
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frametree : tnode;
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constructor create(l,taddr,tframe:tnode);virtual;
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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 buildderefimpl;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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traisenodeclass = class of traisenode;
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ttryexceptnode = class(tloopnode)
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constructor create(l,r,_t1 : 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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ttryexceptnodeclass = class of ttryexceptnode;
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ttryfinallynode = class(tloopnode)
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implicitframe : boolean;
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constructor create(l,r:tnode);virtual;
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constructor create_implicit(l,r,_t1: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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ttryfinallynodeclass = class of ttryfinallynode;
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tonnode = class(tbinarynode)
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exceptsymtable : tsymtable;
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excepttype : tobjectdef;
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constructor create(l,r:tnode);virtual;
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destructor destroy;override;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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function det_resulttype:tnode;override;
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function pass_1 : tnode;override;
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function _getcopy : tnode;override;
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function docompare(p: tnode): boolean; override;
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end;
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tonnodeclass = class of tonnode;
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var
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cwhilerepeatnode : twhilerepeatnodeclass;
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cifnode : tifnodeclass;
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cfornode : tfornodeclass;
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cexitnode : texitnodeclass;
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cbreaknode : tbreaknodeclass;
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ccontinuenode : tcontinuenodeclass;
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cgotonode : tgotonodeclass;
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clabelnode : tlabelnodeclass;
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craisenode : traisenodeclass;
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ctryexceptnode : ttryexceptnodeclass;
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ctryfinallynode : ttryfinallynodeclass;
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connode : tonnodeclass;
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implementation
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uses
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globtype,systems,
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cutils,verbose,globals,
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symconst,paramgr,defcmp,defutil,htypechk,pass_1,
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ncal,nadd,ncon,nmem,nld,ncnv,nbas,cgobj,nutils,
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{$ifdef state_tracking}
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nstate,
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{$endif}
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cgbase,procinfo
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;
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{****************************************************************************
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TLOOPNODE
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*****************************************************************************}
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constructor tloopnode.create(tt : tnodetype;l,r,_t1,_t2 : tnode);
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begin
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inherited create(tt,l,r);
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t1:=_t1;
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t2:=_t2;
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fileinfo:=l.fileinfo;
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end;
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destructor tloopnode.destroy;
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begin
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t1.free;
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t2.free;
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inherited destroy;
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end;
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constructor tloopnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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t1:=ppuloadnode(ppufile);
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t2:=ppuloadnode(ppufile);
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end;
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procedure tloopnode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppuwritenode(ppufile,t1);
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ppuwritenode(ppufile,t2);
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end;
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procedure tloopnode.buildderefimpl;
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begin
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inherited buildderefimpl;
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if assigned(t1) then
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t1.buildderefimpl;
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if assigned(t2) then
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t2.buildderefimpl;
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end;
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procedure tloopnode.derefimpl;
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begin
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inherited derefimpl;
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if assigned(t1) then
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t1.derefimpl;
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if assigned(t2) then
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t2.derefimpl;
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end;
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function tloopnode._getcopy : tnode;
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var
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p : tloopnode;
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begin
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p:=tloopnode(inherited _getcopy);
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if assigned(t1) then
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p.t1:=t1._getcopy
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else
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p.t1:=nil;
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if assigned(t2) then
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p.t2:=t2._getcopy
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else
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p.t2:=nil;
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p.loopflags:=loopflags;
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_getcopy:=p;
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end;
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procedure tloopnode.insertintolist(l : tnodelist);
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begin
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end;
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procedure tloopnode.printnodetree(var t:text);
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begin
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write(t,printnodeindention,'(');
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printnodeindent;
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printnodeinfo(t);
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writeln(t);
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printnode(t,left);
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printnode(t,right);
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printnode(t,t1);
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printnode(t,t2);
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printnodeunindent;
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writeln(t,printnodeindention,')');
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end;
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function tloopnode.docompare(p: tnode): boolean;
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begin
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docompare :=
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inherited docompare(p) and
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(loopflags*loopflagsequal=tloopnode(p).loopflags*loopflagsequal) and
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t1.isequal(tloopnode(p).t1) and
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t2.isequal(tloopnode(p).t2);
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end;
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{****************************************************************************
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TWHILEREPEATNODE
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*****************************************************************************}
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constructor Twhilerepeatnode.create(l,r:Tnode;tab,cn:boolean);
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begin
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inherited create(whilerepeatn,l,r,nil,nil);
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if tab then
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include(loopflags, lnf_testatbegin);
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if cn then
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include(loopflags,lnf_checknegate);
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end;
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function twhilerepeatnode.det_resulttype:tnode;
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var
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t:Tunarynode;
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begin
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result:=nil;
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resulttype:=voidtype;
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resulttypepass(left);
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{ tp procvar support }
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maybe_call_procvar(left,true);
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{A not node can be removed.}
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if left.nodetype=notn then
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begin
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t:=Tunarynode(left);
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left:=Tunarynode(left).left;
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t.left:=nil;
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t.destroy;
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{Symdif operator, in case you are wondering:}
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loopflags:=loopflags >< [lnf_checknegate];
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end;
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{ loop instruction }
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if assigned(right) then
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resulttypepass(right);
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set_varstate(left,vs_used,[vsf_must_be_valid]);
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if codegenerror then
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exit;
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if not is_boolean(left.resulttype.def) then
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begin
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if left.resulttype.def.deftype=variantdef then
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inserttypeconv(left,booltype)
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else
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CGMessage1(type_e_boolean_expr_expected,left.resulttype.def.typename);
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end;
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{ Give warnings for code that will never be executed for
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while false do }
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if (lnf_testatbegin in loopflags) and
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(left.nodetype=ordconstn) and
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(tordconstnode(left).value=0) and
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assigned(right) then
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CGMessagePos(right.fileinfo,cg_w_unreachable_code);
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end;
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function twhilerepeatnode.pass_1 : tnode;
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var
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old_t_times : longint;
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begin
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result:=nil;
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expectloc:=LOC_VOID;
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old_t_times:=cg.t_times;
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{ calc register weight }
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if not(cs_littlesize in aktglobalswitches ) then
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cg.t_times:=cg.t_times*8;
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firstpass(left);
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if codegenerror then
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exit;
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registersint:=left.registersint;
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registersfpu:=left.registersfpu;
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{$ifdef SUPPORT_MMX}
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registersmmx:=left.registersmmx;
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{$endif SUPPORT_MMX}
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{ loop instruction }
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if assigned(right) then
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begin
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firstpass(right);
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if codegenerror then
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exit;
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if registersint<right.registersint then
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registersint:=right.registersint;
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if registersfpu<right.registersfpu then
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registersfpu:=right.registersfpu;
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{$ifdef SUPPORT_MMX}
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if registersmmx<right.registersmmx then
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registersmmx:=right.registersmmx;
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{$endif SUPPORT_MMX}
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end;
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cg.t_times:=old_t_times;
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end;
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{$ifdef state_tracking}
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function Twhilerepeatnode.track_state_pass(exec_known:boolean):boolean;
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var condition:Tnode;
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code:Tnode;
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done:boolean;
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value:boolean;
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change:boolean;
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firsttest:boolean;
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factval:Tnode;
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begin
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track_state_pass:=false;
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done:=false;
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firsttest:=true;
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{For repeat until statements, first do a pass through the code.}
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if not(lnf_testatbegin in flags) then
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begin
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code:=right.getcopy;
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if code.track_state_pass(exec_known) then
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track_state_pass:=true;
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code.destroy;
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end;
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repeat
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condition:=left.getcopy;
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code:=right.getcopy;
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change:=condition.track_state_pass(exec_known);
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factval:=aktstate.find_fact(left);
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if factval<>nil then
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begin
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condition.destroy;
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condition:=factval.getcopy;
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change:=true;
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end;
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if change then
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begin
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track_state_pass:=true;
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{Force new resulttype pass.}
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condition.resulttype.def:=nil;
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do_resulttypepass(condition);
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end;
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if is_constboolnode(condition) then
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begin
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{Try to turn a while loop into a repeat loop.}
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if firsttest then
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exclude(flags,testatbegin);
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value:=(Tordconstnode(condition).value<>0) xor checknegate;
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if value then
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begin
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if code.track_state_pass(exec_known) then
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track_state_pass:=true;
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end
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else
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done:=true;
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end
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else
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begin
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{Remove any modified variables from the state.}
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code.track_state_pass(false);
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done:=true;
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end;
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code.destroy;
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condition.destroy;
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firsttest:=false;
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until done;
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{The loop condition is also known, for example:
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while i<10 do
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begin
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...
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end;
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When the loop is done, we do know that i<10 = false.
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}
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condition:=left.getcopy;
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if condition.track_state_pass(exec_known) then
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begin
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track_state_pass:=true;
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{Force new resulttype pass.}
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condition.resulttype.def:=nil;
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do_resulttypepass(condition);
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end;
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if not is_constboolnode(condition) then
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aktstate.store_fact(condition,
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cordconstnode.create(byte(checknegate),booltype,true))
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else
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condition.destroy;
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end;
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{$endif}
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{*****************************************************************************
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TIFNODE
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*****************************************************************************}
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|
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constructor tifnode.create(l,r,_t1 : tnode);
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begin
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inherited create(ifn,l,r,_t1,nil);
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end;
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function tifnode.det_resulttype:tnode;
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begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
|
|
resulttypepass(left);
|
|
|
|
{ tp procvar support }
|
|
maybe_call_procvar(left,true);
|
|
|
|
{ if path }
|
|
if assigned(right) then
|
|
resulttypepass(right);
|
|
{ else path }
|
|
if assigned(t1) then
|
|
resulttypepass(t1);
|
|
set_varstate(left,vs_used,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
if not is_boolean(left.resulttype.def) then
|
|
begin
|
|
if left.resulttype.def.deftype=variantdef then
|
|
inserttypeconv(left,booltype)
|
|
else
|
|
Message1(type_e_boolean_expr_expected,left.resulttype.def.typename);
|
|
end;
|
|
|
|
{ optimize constant expressions }
|
|
if left.nodetype=ordconstn then
|
|
begin
|
|
if tordconstnode(left).value=1 then
|
|
begin
|
|
if assigned(right) then
|
|
result:=right
|
|
else
|
|
result:=cnothingnode.create;
|
|
right:=nil;
|
|
if assigned(t1) then
|
|
CGMessagePos(t1.fileinfo,cg_w_unreachable_code);
|
|
end
|
|
else
|
|
begin
|
|
if assigned(t1) then
|
|
result:=t1
|
|
else
|
|
result:=cnothingnode.create;
|
|
t1:=nil;
|
|
if assigned(right) then
|
|
CGMessagePos(right.fileinfo,cg_w_unreachable_code);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
function tifnode.pass_1 : tnode;
|
|
var
|
|
old_t_times : longint;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
old_t_times:=cg.t_times;
|
|
firstpass(left);
|
|
registersint:=left.registersint;
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
{ determines registers weigths }
|
|
if not(cs_littlesize in aktglobalswitches) then
|
|
cg.t_times:=cg.t_times div 2;
|
|
if cg.t_times=0 then
|
|
cg.t_times:=1;
|
|
|
|
{ if path }
|
|
if assigned(right) then
|
|
begin
|
|
firstpass(right);
|
|
|
|
if registersint<right.registersint then
|
|
registersint:=right.registersint;
|
|
if registersfpu<right.registersfpu then
|
|
registersfpu:=right.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if registersmmx<right.registersmmx then
|
|
registersmmx:=right.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
|
|
{ else path }
|
|
if assigned(t1) then
|
|
begin
|
|
firstpass(t1);
|
|
|
|
if registersint<t1.registersint then
|
|
registersint:=t1.registersint;
|
|
if registersfpu<t1.registersfpu then
|
|
registersfpu:=t1.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if registersmmx<t1.registersmmx then
|
|
registersmmx:=t1.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
|
|
{ leave if we've got an error in one of the paths }
|
|
|
|
if codegenerror then
|
|
exit;
|
|
|
|
cg.t_times:=old_t_times;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TFORNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tfornode.create(l,r,_t1,_t2 : tnode;back : boolean);
|
|
|
|
begin
|
|
inherited create(forn,l,r,_t1,_t2);
|
|
if back then
|
|
include(loopflags,lnf_backward);
|
|
include(loopflags,lnf_testatbegin);
|
|
end;
|
|
|
|
procedure Tfornode.loop_var_access(not_type:Tnotification_flag;
|
|
symbol:Tsym);
|
|
|
|
begin
|
|
{If there is a read access, the value of the loop counter is important;
|
|
at the end of the loop the loop variable should contain the value it
|
|
had in the last iteration.}
|
|
if not_type=vn_onwrite then
|
|
begin
|
|
writeln('Loopvar does not matter on exit');
|
|
end
|
|
else
|
|
begin
|
|
exclude(loopflags,lnf_dont_mind_loopvar_on_exit);
|
|
writeln('Loopvar does matter on exit');
|
|
end;
|
|
Tabstractvarsym(symbol).unregister_notification(loopvar_notid);
|
|
end;
|
|
|
|
function tfornode.det_resulttype:tnode;
|
|
var
|
|
unrollres : tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
|
|
{ loop unrolling }
|
|
if cs_loopunroll in aktglobalswitches then
|
|
begin
|
|
unrollres:=unroll_loop(self);
|
|
if assigned(unrollres) then
|
|
begin
|
|
resulttypepass(unrollres);
|
|
result:=unrollres;
|
|
exit;
|
|
end;
|
|
end;
|
|
|
|
{ process the loopvar, from and to, varstates are already set }
|
|
resulttypepass(left);
|
|
resulttypepass(right);
|
|
resulttypepass(t1);
|
|
|
|
{Can we spare the first comparision?}
|
|
if (t1.nodetype=ordconstn) and
|
|
(right.nodetype=ordconstn) and
|
|
(
|
|
(
|
|
(lnf_backward in loopflags) and
|
|
(Tordconstnode(right).value>=Tordconstnode(t1).value)
|
|
) or
|
|
(
|
|
not(lnf_backward in loopflags) and
|
|
(Tordconstnode(right).value<=Tordconstnode(t1).value)
|
|
)
|
|
) then
|
|
exclude(loopflags,lnf_testatbegin);
|
|
|
|
{ Make sure that the loop var and the
|
|
from and to values are compatible types }
|
|
inserttypeconv(right,left.resulttype);
|
|
inserttypeconv(t1,left.resulttype);
|
|
|
|
if assigned(t2) then
|
|
resulttypepass(t2);
|
|
end;
|
|
|
|
|
|
function tfornode.pass_1 : tnode;
|
|
var
|
|
old_t_times : longint;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
|
|
firstpass(left);
|
|
if left.registersint>registersint then
|
|
registersint:=left.registersint;
|
|
if left.registersfpu>registersfpu then
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if left.registersmmx>registersmmx then
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
firstpass(right);
|
|
if right.registersint>registersint then
|
|
registersint:=right.registersint;
|
|
if right.registersfpu>registersfpu then
|
|
registersfpu:=right.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if right.registersmmx>registersmmx then
|
|
registersmmx:=right.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
firstpass(t1);
|
|
if t1.registersint>registersint then
|
|
registersint:=t1.registersint;
|
|
if t1.registersfpu>registersfpu then
|
|
registersfpu:=t1.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if t1.registersmmx>registersmmx then
|
|
registersmmx:=t1.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
|
|
if assigned(t2) then
|
|
begin
|
|
{ Calc register weight }
|
|
old_t_times:=cg.t_times;
|
|
if not(cs_littlesize in aktglobalswitches) then
|
|
cg.t_times:=cg.t_times*8;
|
|
firstpass(t2);
|
|
if codegenerror then
|
|
exit;
|
|
if t2.registersint>registersint then
|
|
registersint:=t2.registersint;
|
|
if t2.registersfpu>registersfpu then
|
|
registersfpu:=t2.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
if t2.registersmmx>registersmmx then
|
|
registersmmx:=t2.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
cg.t_times:=old_t_times;
|
|
end;
|
|
|
|
{ we need at least one register for comparisons PM }
|
|
if registersint=0 then
|
|
inc(registersint);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TEXITNODE
|
|
*****************************************************************************}
|
|
|
|
constructor texitnode.create(l:tnode);
|
|
begin
|
|
inherited create(exitn,l);
|
|
end;
|
|
|
|
|
|
constructor texitnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
end;
|
|
|
|
|
|
procedure texitnode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
end;
|
|
|
|
|
|
function texitnode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
if assigned(left) then
|
|
begin
|
|
{ add assignment to funcretsym }
|
|
inserttypeconv(left,current_procinfo.procdef.rettype);
|
|
left:=cassignmentnode.create(
|
|
cloadnode.create(current_procinfo.procdef.funcretsym,current_procinfo.procdef.funcretsym.owner),
|
|
left);
|
|
resulttypepass(left);
|
|
set_varstate(left,vs_used,[vsf_must_be_valid]);
|
|
end;
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function texitnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
if assigned(left) then
|
|
begin
|
|
firstpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
registersint:=left.registersint;
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TBREAKNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tbreaknode.create;
|
|
|
|
begin
|
|
inherited create(breakn);
|
|
end;
|
|
|
|
|
|
function tbreaknode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function tbreaknode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCONTINUENODE
|
|
*****************************************************************************}
|
|
|
|
constructor tcontinuenode.create;
|
|
begin
|
|
inherited create(continuen);
|
|
end;
|
|
|
|
|
|
function tcontinuenode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function tcontinuenode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TGOTONODE
|
|
*****************************************************************************}
|
|
|
|
constructor tgotonode.create(p : tlabelnode);
|
|
begin
|
|
inherited create(goton);
|
|
exceptionblock:=aktexceptblock;
|
|
labelnode:=p;
|
|
labelsym:=nil;
|
|
end;
|
|
|
|
|
|
constructor tgotonode.create_sym(p : tlabelsym);
|
|
begin
|
|
inherited create(goton);
|
|
exceptionblock:=aktexceptblock;
|
|
if assigned(p.code) then
|
|
labelnode:=tlabelnode(p.code)
|
|
else
|
|
labelnode:=nil;
|
|
labelsym:=p;
|
|
end;
|
|
|
|
|
|
constructor tgotonode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
labelnode:=tlabelnode(ppuloadnoderef(ppufile));
|
|
exceptionblock:=ppufile.getbyte;
|
|
end;
|
|
|
|
|
|
procedure tgotonode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppuwritenoderef(ppufile,labelnode);
|
|
ppufile.putbyte(exceptionblock);
|
|
end;
|
|
|
|
|
|
procedure tgotonode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
//!!! deref(labelnode);
|
|
end;
|
|
|
|
|
|
procedure tgotonode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
//!!! deref(labelnode);
|
|
end;
|
|
|
|
|
|
function tgotonode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function tgotonode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
|
|
if not(assigned(labelnode)) then
|
|
begin
|
|
if assigned(labelsym.code) then
|
|
labelnode:=tlabelnode(labelsym.code)
|
|
else
|
|
internalerror(200506183);
|
|
end;
|
|
|
|
{ check if we don't mess with exception blocks }
|
|
if assigned(labelnode) and
|
|
(exceptionblock<>labelnode.exceptionblock) then
|
|
CGMessage(cg_e_goto_inout_of_exception_block);
|
|
end;
|
|
|
|
|
|
function tgotonode._getcopy : tnode;
|
|
var
|
|
p : tgotonode;
|
|
i : aint;
|
|
begin
|
|
p:=tgotonode(inherited _getcopy);
|
|
{
|
|
p.exceptionblock:=exceptionblock;
|
|
{ When we copying, we do an ugly trick to determine if the label used
|
|
by the current goto node is already copied: if the referinggotonodes
|
|
contains the current label, it isn't copied yet, so copy also the
|
|
label node and set the copiedto field to the newly created node.
|
|
|
|
If a label to copy is reached the copiedto field is checked. If it's non nil
|
|
the copiedto field is returned and the copiedto field is reset to nil.
|
|
}
|
|
{ assume no copying }
|
|
newlabelnode:=labelnode;
|
|
for i:=0 to labelnode.copiedto.referingotonodes.count-1 do
|
|
begin
|
|
{ copy labelnode? }
|
|
if labelnode.copiedto.referinggotonodes[i]=self then
|
|
begin
|
|
oldlabelnode.copiedto:=newlabelnode;
|
|
end;
|
|
end;
|
|
p.labelnode:=newlabelnode;
|
|
p.labelnode.referinggotonodes.add(self);
|
|
}
|
|
result:=p;
|
|
end;
|
|
|
|
|
|
function tgotonode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare := false;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TLABELNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tlabelnode.create(l:tnode);
|
|
begin
|
|
inherited create(labeln,l);
|
|
exceptionblock:=aktexceptblock;
|
|
end;
|
|
|
|
|
|
constructor tlabelnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
exceptionblock:=ppufile.getbyte;
|
|
end;
|
|
|
|
|
|
procedure tlabelnode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.putbyte(exceptionblock);
|
|
end;
|
|
|
|
|
|
procedure tlabelnode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
end;
|
|
|
|
|
|
procedure tlabelnode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
end;
|
|
|
|
|
|
function tlabelnode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
{ left could still be unassigned }
|
|
if assigned(left) then
|
|
resulttypepass(left);
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function tlabelnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
if assigned(left) then
|
|
begin
|
|
firstpass(left);
|
|
registersint:=left.registersint;
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
|
|
|
|
function tlabelnode._getcopy : tnode;
|
|
var
|
|
p : tlabelnode;
|
|
begin
|
|
p:=tlabelnode(inherited _getcopy);
|
|
p.exceptionblock:=exceptionblock;
|
|
|
|
result:=p;
|
|
end;
|
|
|
|
|
|
function tlabelnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare := false;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TRAISENODE
|
|
*****************************************************************************}
|
|
|
|
constructor traisenode.create(l,taddr,tframe:tnode);
|
|
begin
|
|
inherited create(raisen,l,taddr);
|
|
frametree:=tframe;
|
|
end;
|
|
|
|
|
|
constructor traisenode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
frametree:=ppuloadnode(ppufile);
|
|
end;
|
|
|
|
|
|
procedure traisenode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppuwritenode(ppufile,frametree);
|
|
end;
|
|
|
|
|
|
procedure traisenode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
if assigned(frametree) then
|
|
frametree.buildderefimpl;
|
|
end;
|
|
|
|
|
|
procedure traisenode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
if assigned(frametree) then
|
|
frametree.derefimpl;
|
|
end;
|
|
|
|
|
|
function traisenode._getcopy : tnode;
|
|
var
|
|
n : traisenode;
|
|
begin
|
|
n:=traisenode(inherited _getcopy);
|
|
if assigned(frametree) then
|
|
n.frametree:=frametree._getcopy
|
|
else
|
|
n.frametree:=nil;
|
|
_getcopy:=n;
|
|
end;
|
|
|
|
|
|
procedure traisenode.insertintolist(l : tnodelist);
|
|
begin
|
|
end;
|
|
|
|
|
|
function traisenode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
if assigned(left) then
|
|
begin
|
|
{ first para must be a _class_ }
|
|
resulttypepass(left);
|
|
set_varstate(left,vs_used,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
if not(is_class(left.resulttype.def)) then
|
|
CGMessage1(type_e_class_type_expected,left.resulttype.def.typename);
|
|
{ insert needed typeconvs for addr,frame }
|
|
if assigned(right) then
|
|
begin
|
|
{ addr }
|
|
resulttypepass(right);
|
|
inserttypeconv(right,voidpointertype);
|
|
{ frame }
|
|
if assigned(frametree) then
|
|
begin
|
|
resulttypepass(frametree);
|
|
inserttypeconv(frametree,voidpointertype);
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
function traisenode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
include(current_procinfo.flags,pi_do_call);
|
|
expectloc:=LOC_VOID;
|
|
if assigned(left) then
|
|
begin
|
|
{ first para must be a _class_ }
|
|
firstpass(left);
|
|
{ insert needed typeconvs for addr,frame }
|
|
if assigned(right) then
|
|
begin
|
|
{ addr }
|
|
firstpass(right);
|
|
{ frame }
|
|
if assigned(frametree) then
|
|
firstpass(frametree);
|
|
end;
|
|
left_right_max;
|
|
end;
|
|
end;
|
|
|
|
|
|
function traisenode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare := false;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TTRYEXCEPTNODE
|
|
*****************************************************************************}
|
|
|
|
constructor ttryexceptnode.create(l,r,_t1 : tnode);
|
|
begin
|
|
inherited create(tryexceptn,l,r,_t1,nil);
|
|
end;
|
|
|
|
|
|
function ttryexceptnode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttypepass(left);
|
|
{ on statements }
|
|
if assigned(right) then
|
|
resulttypepass(right);
|
|
{ else block }
|
|
if assigned(t1) then
|
|
resulttypepass(t1);
|
|
resulttype:=voidtype;
|
|
end;
|
|
|
|
|
|
function ttryexceptnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
include(current_procinfo.flags,pi_do_call);
|
|
expectloc:=LOC_VOID;
|
|
firstpass(left);
|
|
{ on statements }
|
|
if assigned(right) then
|
|
begin
|
|
firstpass(right);
|
|
registersint:=max(registersint,right.registersint);
|
|
registersfpu:=max(registersfpu,right.registersfpu);
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=max(registersmmx,right.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
{ else block }
|
|
if assigned(t1) then
|
|
begin
|
|
firstpass(t1);
|
|
registersint:=max(registersint,t1.registersint);
|
|
registersfpu:=max(registersfpu,t1.registersfpu);
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=max(registersmmx,t1.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TTRYFINALLYNODE
|
|
*****************************************************************************}
|
|
|
|
constructor ttryfinallynode.create(l,r:tnode);
|
|
begin
|
|
inherited create(tryfinallyn,l,r,nil,nil);
|
|
implicitframe:=false;
|
|
end;
|
|
|
|
|
|
constructor ttryfinallynode.create_implicit(l,r,_t1:tnode);
|
|
begin
|
|
inherited create(tryfinallyn,l,r,_t1,nil);
|
|
implicitframe:=true;
|
|
end;
|
|
|
|
|
|
function ttryfinallynode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
include(current_procinfo.flags,pi_do_call);
|
|
resulttype:=voidtype;
|
|
|
|
resulttypepass(left);
|
|
set_varstate(left,vs_used,[vsf_must_be_valid]);
|
|
|
|
resulttypepass(right);
|
|
set_varstate(right,vs_used,[vsf_must_be_valid]);
|
|
|
|
{ special finally block only executed when there was an exception }
|
|
if assigned(t1) then
|
|
begin
|
|
resulttypepass(t1);
|
|
set_varstate(t1,vs_used,[vsf_must_be_valid]);
|
|
end;
|
|
end;
|
|
|
|
|
|
function ttryfinallynode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
firstpass(left);
|
|
|
|
firstpass(right);
|
|
left_right_max;
|
|
|
|
if assigned(t1) then
|
|
begin
|
|
firstpass(t1);
|
|
registersint:=max(registersint,t1.registersint);
|
|
registersfpu:=max(registersfpu,t1.registersfpu);
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=max(registersmmx,t1.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TONNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tonnode.create(l,r:tnode);
|
|
begin
|
|
inherited create(onn,l,r);
|
|
exceptsymtable:=nil;
|
|
excepttype:=nil;
|
|
end;
|
|
|
|
|
|
destructor tonnode.destroy;
|
|
begin
|
|
{ copied nodes don't need to release the symtable }
|
|
if assigned(exceptsymtable) then
|
|
exceptsymtable.free;
|
|
inherited destroy;
|
|
end;
|
|
|
|
|
|
constructor tonnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
exceptsymtable:=nil;
|
|
excepttype:=nil;
|
|
end;
|
|
|
|
|
|
function tonnode._getcopy : tnode;
|
|
var
|
|
n : tonnode;
|
|
begin
|
|
n:=tonnode(inherited _getcopy);
|
|
n.exceptsymtable:=exceptsymtable.getcopy;
|
|
n.excepttype:=excepttype;
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
function tonnode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=voidtype;
|
|
if not(is_class(excepttype)) then
|
|
CGMessage1(type_e_class_type_expected,excepttype.typename);
|
|
if assigned(left) then
|
|
resulttypepass(left);
|
|
if assigned(right) then
|
|
resulttypepass(right);
|
|
end;
|
|
|
|
|
|
function tonnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
include(current_procinfo.flags,pi_do_call);
|
|
expectloc:=LOC_VOID;
|
|
registersint:=0;
|
|
registersfpu:=0;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=0;
|
|
{$endif SUPPORT_MMX}
|
|
if assigned(left) then
|
|
begin
|
|
firstpass(left);
|
|
registersint:=left.registersint;
|
|
registersfpu:=left.registersfpu;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
|
|
if assigned(right) then
|
|
begin
|
|
firstpass(right);
|
|
registersint:=max(registersint,right.registersint);
|
|
registersfpu:=max(registersfpu,right.registersfpu);
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=max(registersmmx,right.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
|
|
|
|
function tonnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare := false;
|
|
end;
|
|
|
|
|
|
begin
|
|
cwhilerepeatnode:=twhilerepeatnode;
|
|
cifnode:=tifnode;
|
|
cfornode:=tfornode;
|
|
cexitnode:=texitnode;
|
|
cgotonode:=tgotonode;
|
|
clabelnode:=tlabelnode;
|
|
craisenode:=traisenode;
|
|
ctryexceptnode:=ttryexceptnode;
|
|
ctryfinallynode:=ttryfinallynode;
|
|
connode:=tonnode;
|
|
end.
|