mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 21:09:38 +01:00
1210 lines
42 KiB
ObjectPascal
1210 lines
42 KiB
ObjectPascal
{
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Copyright (c) 2000-2002 by Florian Klaempfl
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Type checking and register allocation for load/assignment 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 nld;
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{$i fpcdefs.inc}
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interface
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uses
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node,
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{$ifdef state_tracking}
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nstate,
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{$endif}
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symconst,symbase,symtype,symsym,symdef;
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type
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tloadnode = class(tunarynode)
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symtableentry : tsym;
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symtableentryderef : tderef;
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symtable : tsymtable;
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procdef : tprocdef;
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procdefderef : tderef;
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constructor create(v : tsym;st : tsymtable);virtual;
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constructor create_procvar(v : tsym;d:tprocdef;st : tsymtable);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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procedure set_mp(p:tnode);
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function is_addr_param_load:boolean;
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function _getcopy : tnode;override;
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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procedure mark_write;override;
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function docompare(p: tnode): boolean; override;
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procedure printnodedata(var t:text);override;
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end;
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tloadnodeclass = class of tloadnode;
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{ different assignment types }
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tassigntype = (at_normal,at_plus,at_minus,at_star,at_slash);
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tassignmentnode = class(tbinarynode)
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assigntype : tassigntype;
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constructor create(l,r : 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 _getcopy : tnode;override;
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function pass_1 : tnode;override;
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function det_resulttype: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 state_tracking}
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function docompare(p: tnode): boolean; override;
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end;
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tassignmentnodeclass = class of tassignmentnode;
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tarrayconstructorrangenode = class(tbinarynode)
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constructor create(l,r : tnode);virtual;
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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end;
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tarrayconstructorrangenodeclass = class of tarrayconstructorrangenode;
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tarrayconstructornode = class(tbinarynode)
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constructor create(l,r : tnode);virtual;
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function _getcopy : tnode;override;
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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function docompare(p: tnode): boolean; override;
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procedure force_type(tt:ttype);
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procedure insert_typeconvs;
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end;
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tarrayconstructornodeclass = class of tarrayconstructornode;
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ttypenode = class(tnode)
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allowed : boolean;
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restype : ttype;
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constructor create(t : ttype);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 pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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function docompare(p: tnode): boolean; override;
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end;
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ttypenodeclass = class of ttypenode;
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trttinode = class(tnode)
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l1,l2 : longint;
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rttitype : trttitype;
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rttidef : tstoreddef;
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rttidefderef : tderef;
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constructor create(def:tstoreddef;rt:trttitype);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 pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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function docompare(p: tnode): boolean; override;
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end;
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trttinodeclass = class of trttinode;
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var
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cloadnode : tloadnodeclass;
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cassignmentnode : tassignmentnodeclass;
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carrayconstructorrangenode : tarrayconstructorrangenodeclass;
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carrayconstructornode : tarrayconstructornodeclass;
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ctypenode : ttypenodeclass;
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crttinode : trttinodeclass;
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implementation
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uses
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cutils,verbose,globtype,globals,systems,
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symnot,
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defutil,defcmp,
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htypechk,pass_1,procinfo,paramgr,
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ncon,ninl,ncnv,nmem,ncal,nutils,
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cgobj,cgbase
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;
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{*****************************************************************************
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TLOADNODE
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*****************************************************************************}
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constructor tloadnode.create(v : tsym;st : tsymtable);
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begin
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inherited create(loadn,nil);
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if not assigned(v) then
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internalerror(200108121);
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symtableentry:=v;
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symtable:=st;
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procdef:=nil;
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end;
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constructor tloadnode.create_procvar(v : tsym;d:tprocdef;st : tsymtable);
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begin
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inherited create(loadn,nil);
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if not assigned(v) then
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internalerror(200108121);
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symtableentry:=v;
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symtable:=st;
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procdef:=d;
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end;
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constructor tloadnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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ppufile.getderef(symtableentryderef);
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symtable:=nil;
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ppufile.getderef(procdefderef);
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end;
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procedure tloadnode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppufile.putderef(symtableentryderef);
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ppufile.putderef(procdefderef);
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end;
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procedure tloadnode.buildderefimpl;
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begin
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inherited buildderefimpl;
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symtableentryderef.build(symtableentry);
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procdefderef.build(procdef);
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end;
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procedure tloadnode.derefimpl;
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begin
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inherited derefimpl;
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symtableentry:=tsym(symtableentryderef.resolve);
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symtable:=symtableentry.owner;
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procdef:=tprocdef(procdefderef.resolve);
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end;
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procedure tloadnode.set_mp(p:tnode);
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begin
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{ typen nodes should not be set }
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if p.nodetype=typen then
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internalerror(200301042);
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left:=p;
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end;
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function tloadnode._getcopy : tnode;
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var
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n : tloadnode;
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begin
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n:=tloadnode(inherited _getcopy);
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n.symtable:=symtable;
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n.symtableentry:=symtableentry;
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n.procdef:=procdef;
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result:=n;
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end;
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function tloadnode.is_addr_param_load:boolean;
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begin
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result:=(symtable.symtabletype=parasymtable) and
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(symtableentry.typ=paravarsym) and
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not(vo_has_local_copy in tparavarsym(symtableentry).varoptions) and
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not(nf_load_self_pointer in flags) and
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paramanager.push_addr_param(tparavarsym(symtableentry).varspez,tparavarsym(symtableentry).vartype.def,tprocdef(symtable.defowner).proccalloption);
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end;
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function tloadnode.det_resulttype:tnode;
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begin
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result:=nil;
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case symtableentry.typ of
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absolutevarsym :
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resulttype:=tabsolutevarsym(symtableentry).vartype;
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constsym:
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begin
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if tconstsym(symtableentry).consttyp=constresourcestring then
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begin
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{$ifdef ansistring_bits}
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case aktansistring_bits of
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sb_16:
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resulttype:=cansistringtype16;
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sb_32:
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resulttype:=cansistringtype32;
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sb_64:
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resulttype:=cansistringtype64;
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end;
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{$else}
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resulttype:=cansistringtype
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{$endif}
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end
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else
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internalerror(22799);
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end;
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globalvarsym,
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paravarsym,
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localvarsym :
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begin
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inc(tabstractvarsym(symtableentry).refs);
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{ Nested variable? The we need to load the framepointer of
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the parent procedure }
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if assigned(current_procinfo) then
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begin
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if (symtable.symtabletype in [localsymtable,parasymtable]) and
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(symtable.symtablelevel<>current_procinfo.procdef.parast.symtablelevel) then
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begin
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if assigned(left) then
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internalerror(200309289);
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left:=cloadparentfpnode.create(tprocdef(symtable.defowner));
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{ we can't inline the referenced parent procedure }
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exclude(tprocdef(symtable.defowner).procoptions,po_inline);
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{ reference in nested procedures, variable needs to be in memory }
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make_not_regable(self);
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end;
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{ static variables referenced in procedures or from finalization,
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variable needs to be in memory.
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It is too hard and the benefit is too small to detect whether a
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variable is only used in the finalization to add support for it (PFV) }
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if (symtable.symtabletype=staticsymtable) and
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(
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(symtable.symtablelevel<>current_procinfo.procdef.localst.symtablelevel) or
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(current_procinfo.procdef.proctypeoption=potype_unitfinalize)
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) then
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make_not_regable(self);
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end;
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{ fix self type which is declared as voidpointer in the
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definition }
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if vo_is_self in tabstractvarsym(symtableentry).varoptions then
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begin
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resulttype.setdef(tprocdef(symtableentry.owner.defowner)._class);
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if (po_classmethod in tprocdef(symtableentry.owner.defowner).procoptions) or
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(po_staticmethod in tprocdef(symtableentry.owner.defowner).procoptions) then
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resulttype.setdef(tclassrefdef.create(resulttype))
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else if is_object(resulttype.def) and
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(nf_load_self_pointer in flags) then
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resulttype.setdef(tpointerdef.create(resulttype));
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end
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else if vo_is_vmt in tabstractvarsym(symtableentry).varoptions then
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begin
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resulttype.setdef(tprocdef(symtableentry.owner.defowner)._class);
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resulttype.setdef(tclassrefdef.create(resulttype));
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end
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else
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resulttype:=tabstractvarsym(symtableentry).vartype;
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end;
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typedconstsym :
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resulttype:=ttypedconstsym(symtableentry).typedconsttype;
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procsym :
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begin
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if not assigned(procdef) then
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begin
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if Tprocsym(symtableentry).procdef_count>1 then
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CGMessage(parser_e_no_overloaded_procvars);
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procdef:=tprocsym(symtableentry).first_procdef;
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end;
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{ the result is a procdef, addrn and proc_to_procvar
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typeconvn need this as resulttype so they know
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that the address needs to be returned }
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resulttype.setdef(procdef);
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{ process methodpointer }
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if assigned(left) then
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resulttypepass(left);
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end;
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labelsym:
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resulttype:=voidtype;
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else
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internalerror(200104141);
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end;
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end;
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procedure Tloadnode.mark_write;
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begin
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include(flags,nf_write);
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end;
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function tloadnode.pass_1 : tnode;
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begin
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result:=nil;
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expectloc:=LOC_REFERENCE;
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registersint:=0;
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registersfpu:=0;
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{$ifdef SUPPORT_MMX}
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registersmmx:=0;
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{$endif SUPPORT_MMX}
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if (cs_create_pic in aktmoduleswitches) and
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not(symtableentry.typ in [paravarsym,localvarsym]) then
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include(current_procinfo.flags,pi_needs_got);
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case symtableentry.typ of
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absolutevarsym :
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;
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constsym:
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begin
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if tconstsym(symtableentry).consttyp=constresourcestring then
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expectloc:=LOC_CREFERENCE;
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end;
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globalvarsym,
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localvarsym,
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paravarsym :
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begin
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if assigned(left) then
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firstpass(left);
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if not is_addr_param_load and
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tabstractvarsym(symtableentry).is_regvar then
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begin
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case tabstractvarsym(symtableentry).varregable of
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vr_intreg :
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expectloc:=LOC_CREGISTER;
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vr_fpureg :
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expectloc:=LOC_CFPUREGISTER;
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vr_mmreg :
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expectloc:=LOC_CMMREGISTER;
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end
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end
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else
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if (tabstractvarsym(symtableentry).varspez=vs_const) then
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expectloc:=LOC_CREFERENCE;
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{ we need a register for call by reference parameters }
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if paramanager.push_addr_param(tabstractvarsym(symtableentry).varspez,tabstractvarsym(symtableentry).vartype.def,pocall_default) then
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registersint:=1;
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if ([vo_is_thread_var,vo_is_dll_var]*tabstractvarsym(symtableentry).varoptions)<>[] then
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registersint:=1;
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if (target_info.system=system_powerpc_darwin) and
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([vo_is_dll_var,vo_is_external] * tabstractvarsym(symtableentry).varoptions <> []) then
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include(current_procinfo.flags,pi_needs_got);
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{ call to get address of threadvar }
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if (vo_is_thread_var in tabstractvarsym(symtableentry).varoptions) then
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include(current_procinfo.flags,pi_do_call);
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if nf_write in flags then
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Tabstractvarsym(symtableentry).trigger_notifications(vn_onwrite)
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else
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Tabstractvarsym(symtableentry).trigger_notifications(vn_onread);
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{ count variable references }
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if cg.t_times>1 then
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inc(tabstractvarsym(symtableentry).refs,cg.t_times-1);
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end;
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typedconstsym :
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;
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procsym :
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begin
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{ method pointer ? }
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if assigned(left) then
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begin
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expectloc:=LOC_CREFERENCE;
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firstpass(left);
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registersint:=max(registersint,left.registersint);
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registersfpu:=max(registersfpu,left.registersfpu);
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{$ifdef SUPPORT_MMX}
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registersmmx:=max(registersmmx,left.registersmmx);
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{$endif SUPPORT_MMX}
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end;
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end;
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labelsym :
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;
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else
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internalerror(200104143);
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end;
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end;
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function tloadnode.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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(symtableentry = tloadnode(p).symtableentry) and
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(procdef = tloadnode(p).procdef) and
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(symtable = tloadnode(p).symtable);
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end;
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procedure Tloadnode.printnodedata(var t:text);
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begin
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inherited printnodedata(t);
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write(t,printnodeindention,'symbol = ',symtableentry.name);
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if symtableentry.typ=procsym then
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write(t,printnodeindention,'procdef = ',procdef.mangledname);
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writeln(t,'');
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end;
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{*****************************************************************************
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TASSIGNMENTNODE
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*****************************************************************************}
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constructor tassignmentnode.create(l,r : tnode);
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begin
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inherited create(assignn,l,r);
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l.mark_write;
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assigntype:=at_normal;
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end;
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constructor tassignmentnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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assigntype:=tassigntype(ppufile.getbyte);
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end;
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procedure tassignmentnode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppufile.putbyte(byte(assigntype));
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end;
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function tassignmentnode._getcopy : tnode;
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var
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n : tassignmentnode;
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begin
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n:=tassignmentnode(inherited _getcopy);
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n.assigntype:=assigntype;
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result:=n;
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end;
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|
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function tassignmentnode.det_resulttype:tnode;
|
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var
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hp : tnode;
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useshelper : boolean;
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original_size : longint;
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begin
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result:=nil;
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resulttype:=voidtype;
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original_size := 0;
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{ must be made unique }
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set_unique(left);
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resulttypepass(left);
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if is_ansistring(left.resulttype.def) then
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begin
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{ fold <ansistring>:=<ansistring>+<char|shortstring|ansistring> }
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if (right.nodetype=addn) and
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left.isequal(tbinarynode(right).left) and
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{ don't fold multiple concatenations else we could get trouble
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with multiple uses of s
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}
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(tbinarynode(right).left.nodetype<>addn) and
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(tbinarynode(right).right.nodetype<>addn) then
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begin
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{ don't do a resulttypepass(right), since then the addnode }
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{ may insert typeconversions that make this optimization }
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{ opportunity quite difficult to detect (JM) }
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resulttypepass(tbinarynode(right).left);
|
|
resulttypepass(tbinarynode(right).right);
|
|
if (is_char(tbinarynode(right).right.resulttype.def) or
|
|
is_shortstring(tbinarynode(right).right.resulttype.def) or
|
|
is_ansistring(tbinarynode(right).right.resulttype.def)) then
|
|
begin
|
|
{ remove property flag so it'll not trigger an error }
|
|
exclude(left.flags,nf_isproperty);
|
|
{ generate call to helper }
|
|
hp:=ccallparanode.create(tbinarynode(right).right,
|
|
ccallparanode.create(left,nil));
|
|
if is_char(tbinarynode(right).right.resulttype.def) then
|
|
result:=ccallnode.createintern('fpc_'+Tstringdef(left.resulttype.def).stringtypname+'_append_char',hp)
|
|
else if is_shortstring(tbinarynode(right).right.resulttype.def) then
|
|
result:=ccallnode.createintern('fpc_'+Tstringdef(left.resulttype.def).stringtypname+'_append_shortstring',hp)
|
|
else
|
|
result:=ccallnode.createintern('fpc_'+Tstringdef(left.resulttype.def).stringtypname+'_append_ansistring',hp);
|
|
tbinarynode(right).right:=nil;
|
|
left:=nil;
|
|
exit;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
if is_shortstring(left.resulttype.def) then
|
|
begin
|
|
{ fold <shortstring>:=<shortstring>+<shortstring>,
|
|
<shortstring>+<char> is handled by an optimized node }
|
|
if (right.nodetype=addn) and
|
|
left.isequal(tbinarynode(right).left) and
|
|
{ don't fold multiple concatenations else we could get trouble
|
|
with multiple uses of s }
|
|
(tbinarynode(right).left.nodetype<>addn) and
|
|
(tbinarynode(right).right.nodetype<>addn) then
|
|
begin
|
|
{ don't do a resulttypepass(right), since then the addnode }
|
|
{ may insert typeconversions that make this optimization }
|
|
{ opportunity quite difficult to detect (JM) }
|
|
resulttypepass(tbinarynode(right).left);
|
|
resulttypepass(tbinarynode(right).right);
|
|
if is_shortstring(tbinarynode(right).right.resulttype.def) then
|
|
begin
|
|
{ remove property flag so it'll not trigger an error }
|
|
exclude(left.flags,nf_isproperty);
|
|
{ generate call to helper }
|
|
hp:=ccallparanode.create(tbinarynode(right).right,
|
|
ccallparanode.create(left,nil));
|
|
if is_shortstring(tbinarynode(right).right.resulttype.def) then
|
|
result:=ccallnode.createintern('fpc_shortstr_append_shortstr',hp);
|
|
tbinarynode(right).right:=nil;
|
|
left:=nil;
|
|
exit;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
resulttypepass(right);
|
|
set_varstate(left,vs_assigned,[]);
|
|
set_varstate(right,vs_used,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ tp procvar support, when we don't expect a procvar
|
|
then we need to call the procvar }
|
|
if (left.resulttype.def.deftype<>procvardef) then
|
|
maybe_call_procvar(right,true);
|
|
|
|
{ assignments to formaldefs and open arrays aren't allowed }
|
|
if (left.resulttype.def.deftype=formaldef) or
|
|
is_open_array(left.resulttype.def) then
|
|
CGMessage(type_e_operator_not_allowed);
|
|
|
|
{ test if node can be assigned, properties are allowed }
|
|
valid_for_assignment(left);
|
|
|
|
{ assigning nil to a dynamic array clears the array }
|
|
if is_dynamic_array(left.resulttype.def) and
|
|
(right.nodetype=niln) then
|
|
begin
|
|
hp:=ccallparanode.create(caddrnode.create_internal
|
|
(crttinode.create(tstoreddef(left.resulttype.def),initrtti)),
|
|
ccallparanode.create(ctypeconvnode.create_internal(left,voidpointertype),nil));
|
|
result := ccallnode.createintern('fpc_dynarray_clear',hp);
|
|
left:=nil;
|
|
exit;
|
|
end;
|
|
|
|
{ shortstring helpers can do the conversion directly,
|
|
so treat them separatly }
|
|
if (is_shortstring(left.resulttype.def)) then
|
|
begin
|
|
{ insert typeconv, except for chars that are handled in
|
|
secondpass and except for ansi/wide string that can
|
|
be converted immediatly }
|
|
if not(is_char(right.resulttype.def) or
|
|
(right.resulttype.def.deftype=stringdef)) then
|
|
inserttypeconv(right,left.resulttype);
|
|
if right.resulttype.def.deftype=stringdef then
|
|
begin
|
|
useshelper:=true;
|
|
{ convert constant strings to shortstrings. But
|
|
skip empty constant strings, that will be handled
|
|
in secondpass }
|
|
if (right.nodetype=stringconstn) then
|
|
begin
|
|
{ verify if range fits within shortstring }
|
|
{ just emit a warning, delphi gives an }
|
|
{ error, only if the type definition of }
|
|
{ of the string is less < 255 characters }
|
|
if not is_open_string(left.resulttype.def) and
|
|
(tstringconstnode(right).len > tstringdef(left.resulttype.def).len) then
|
|
cgmessage(type_w_string_too_long);
|
|
inserttypeconv(right,left.resulttype);
|
|
if (tstringconstnode(right).len=0) then
|
|
useshelper:=false;
|
|
end;
|
|
{ rest is done in pass 1 (JM) }
|
|
if useshelper then
|
|
exit;
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
{ get the size before the type conversion - check for all nodes }
|
|
if assigned(right.resulttype.def) and
|
|
(right.resulttype.def.deftype in [enumdef,orddef,floatdef]) and
|
|
(right.nodetype in [loadn,vecn,calln]) then
|
|
original_size := right.resulttype.def.size;
|
|
inserttypeconv(right,left.resulttype);
|
|
end;
|
|
|
|
{ check if the assignment may cause a range check error }
|
|
{ if its not explicit, and only if the values are }
|
|
{ ordinals, enumdef and floatdef }
|
|
if (right.nodetype = typeconvn) and
|
|
not (nf_explicit in ttypeconvnode(right).flags) then
|
|
begin
|
|
if assigned(left.resulttype.def) and
|
|
(left.resulttype.def.deftype in [enumdef,orddef,floatdef]) and
|
|
not is_boolean(left.resulttype.def) then
|
|
begin
|
|
if (original_size <> 0) and
|
|
(left.resulttype.def.size < original_size) then
|
|
begin
|
|
if (cs_check_range in aktlocalswitches) then
|
|
Message(type_w_smaller_possible_range_check)
|
|
else
|
|
Message(type_h_smaller_possible_range_check);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ call helpers for interface }
|
|
if is_interfacecom(left.resulttype.def) then
|
|
begin
|
|
hp:=ccallparanode.create(ctypeconvnode.create_internal
|
|
(right,voidpointertype),
|
|
ccallparanode.create(ctypeconvnode.create_internal
|
|
(left,voidpointertype),nil));
|
|
result:=ccallnode.createintern('fpc_intf_assign',hp);
|
|
left:=nil;
|
|
right:=nil;
|
|
exit;
|
|
end;
|
|
{ call helpers for variant, they can contain non ref. counted types like
|
|
vararrays which must be really copied }
|
|
if left.resulttype.def.deftype=variantdef then
|
|
begin
|
|
hp:=ccallparanode.create(ctypeconvnode.create_internal(
|
|
caddrnode.create_internal(right),voidpointertype),
|
|
ccallparanode.create(ctypeconvnode.create_internal(
|
|
caddrnode.create_internal(left),voidpointertype),
|
|
nil));
|
|
result:=ccallnode.createintern('fpc_variant_copy',hp);
|
|
left:=nil;
|
|
right:=nil;
|
|
exit;
|
|
end;
|
|
|
|
{ check if local proc/func is assigned to procvar }
|
|
if right.resulttype.def.deftype=procvardef then
|
|
test_local_to_procvar(tprocvardef(right.resulttype.def),left.resulttype.def);
|
|
end;
|
|
|
|
|
|
function tassignmentnode.pass_1 : tnode;
|
|
var
|
|
hp: tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
|
|
firstpass(left);
|
|
firstpass(right);
|
|
{ assignment to refcounted variable -> inc/decref }
|
|
if (not is_class(left.resulttype.def) and
|
|
left.resulttype.def.needs_inittable) then
|
|
include(current_procinfo.flags,pi_do_call);
|
|
|
|
if codegenerror then
|
|
exit;
|
|
|
|
|
|
if (is_shortstring(left.resulttype.def)) then
|
|
begin
|
|
if right.resulttype.def.deftype=stringdef then
|
|
begin
|
|
if (right.nodetype<>stringconstn) or
|
|
(tstringconstnode(right).len<>0) then
|
|
begin
|
|
if (cs_optimize in aktglobalswitches) and
|
|
(right.nodetype in [calln,blockn]) and
|
|
(left.nodetype = temprefn) and
|
|
is_shortstring(right.resulttype.def) and
|
|
not is_open_string(left.resulttype.def) and
|
|
(tstringdef(left.resulttype.def).len = 255) then
|
|
begin
|
|
{ the blocknode case is handled in pass_2 at the temp }
|
|
{ reference level (mainly for callparatemp) (JM) }
|
|
if (right.nodetype = calln) then
|
|
begin
|
|
tcallnode(right).funcretnode := left;
|
|
result := right;
|
|
end
|
|
else
|
|
exit;
|
|
end
|
|
else
|
|
begin
|
|
hp:=ccallparanode.create
|
|
(right,
|
|
ccallparanode.create(cinlinenode.create
|
|
(in_high_x,false,left.getcopy),nil));
|
|
result:=ccallnode.createinternreturn('fpc_'+tstringdef(right.resulttype.def).stringtypname+'_to_shortstr',hp,left);
|
|
firstpass(result);
|
|
end;
|
|
left:=nil;
|
|
right:=nil;
|
|
exit;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
if (cs_optimize in aktglobalswitches) and
|
|
(right.nodetype = calln) and
|
|
{ left must be a temp, since otherwise as soon as you modify the }
|
|
{ result, the current left node is modified and that one may }
|
|
{ still be an argument to the function or even accessed in the }
|
|
{ function }
|
|
(((left.nodetype = temprefn) and
|
|
paramanager.ret_in_param(right.resulttype.def,
|
|
tcallnode(right).procdefinition.proccalloption)) or
|
|
{ there's special support for ansi/widestrings in the callnode }
|
|
is_ansistring(right.resulttype.def) or
|
|
is_widestring(right.resulttype.def)) then
|
|
begin
|
|
tcallnode(right).funcretnode := left;
|
|
result := right;
|
|
left := nil;
|
|
right := nil;
|
|
exit;
|
|
end;
|
|
|
|
|
|
registersint:=left.registersint+right.registersint;
|
|
registersfpu:=max(left.registersfpu,right.registersfpu);
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=max(left.registersmmx,right.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
|
|
|
|
function tassignmentnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
(assigntype = tassignmentnode(p).assigntype);
|
|
end;
|
|
|
|
{$ifdef state_tracking}
|
|
function Tassignmentnode.track_state_pass(exec_known:boolean):boolean;
|
|
|
|
var se:Tstate_entry;
|
|
|
|
begin
|
|
track_state_pass:=false;
|
|
if exec_known then
|
|
begin
|
|
track_state_pass:=right.track_state_pass(exec_known);
|
|
{Force a new resulttype pass.}
|
|
right.resulttype.def:=nil;
|
|
do_resulttypepass(right);
|
|
resulttypepass(right);
|
|
aktstate.store_fact(left.getcopy,right.getcopy);
|
|
end
|
|
else
|
|
aktstate.delete_fact(left);
|
|
end;
|
|
{$endif}
|
|
|
|
|
|
{*****************************************************************************
|
|
TARRAYCONSTRUCTORRANGENODE
|
|
*****************************************************************************}
|
|
|
|
constructor tarrayconstructorrangenode.create(l,r : tnode);
|
|
|
|
begin
|
|
inherited create(arrayconstructorrangen,l,r);
|
|
end;
|
|
|
|
function tarrayconstructorrangenode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttypepass(left);
|
|
resulttypepass(right);
|
|
set_varstate(left,vs_used,[vsf_must_be_valid]);
|
|
set_varstate(right,vs_used,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
resulttype:=left.resulttype;
|
|
end;
|
|
|
|
|
|
function tarrayconstructorrangenode.pass_1 : tnode;
|
|
begin
|
|
firstpass(left);
|
|
firstpass(right);
|
|
expectloc:=LOC_CREFERENCE;
|
|
calcregisters(self,0,0,0);
|
|
result:=nil;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
TARRAYCONSTRUCTORNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tarrayconstructornode.create(l,r : tnode);
|
|
begin
|
|
inherited create(arrayconstructorn,l,r);
|
|
end;
|
|
|
|
|
|
function tarrayconstructornode._getcopy : tnode;
|
|
var
|
|
n : tarrayconstructornode;
|
|
begin
|
|
n:=tarrayconstructornode(inherited _getcopy);
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
function tarrayconstructornode.det_resulttype:tnode;
|
|
var
|
|
htype : ttype;
|
|
hp : tarrayconstructornode;
|
|
len : longint;
|
|
varia : boolean;
|
|
begin
|
|
result:=nil;
|
|
|
|
{ are we allowing array constructor? Then convert it to a set }
|
|
if not allow_array_constructor then
|
|
begin
|
|
hp:=tarrayconstructornode(getcopy);
|
|
arrayconstructor_to_set(tnode(hp));
|
|
result:=hp;
|
|
exit;
|
|
end;
|
|
|
|
{ only pass left tree, right tree contains next construct if any }
|
|
htype.reset;
|
|
len:=0;
|
|
varia:=false;
|
|
if assigned(left) then
|
|
begin
|
|
hp:=self;
|
|
while assigned(hp) do
|
|
begin
|
|
resulttypepass(hp.left);
|
|
set_varstate(hp.left,vs_used,[vsf_must_be_valid]);
|
|
if (htype.def=nil) then
|
|
htype:=hp.left.resulttype
|
|
else
|
|
begin
|
|
if ((nf_novariaallowed in flags) or (not varia)) and
|
|
(not equal_defs(htype.def,hp.left.resulttype.def)) then
|
|
begin
|
|
varia:=true;
|
|
end;
|
|
end;
|
|
inc(len);
|
|
hp:=tarrayconstructornode(hp.right);
|
|
end;
|
|
end;
|
|
{ Set the type of empty or varia arrays to void. Also
|
|
do this if the type is array of const/open array
|
|
because those can't be used with setelementtype }
|
|
if not assigned(htype.def) or
|
|
varia or
|
|
is_array_of_const(htype.def) or
|
|
is_open_array(htype.def) then
|
|
htype:=voidtype;
|
|
resulttype.setdef(tarraydef.create(0,len-1,s32inttype));
|
|
tarraydef(resulttype.def).setelementtype(htype);
|
|
tarraydef(resulttype.def).IsConstructor:=true;
|
|
tarraydef(resulttype.def).IsVariant:=varia;
|
|
end;
|
|
|
|
|
|
procedure tarrayconstructornode.force_type(tt:ttype);
|
|
var
|
|
hp : tarrayconstructornode;
|
|
begin
|
|
tarraydef(resulttype.def).setelementtype(tt);
|
|
tarraydef(resulttype.def).IsConstructor:=true;
|
|
tarraydef(resulttype.def).IsVariant:=false;
|
|
if assigned(left) then
|
|
begin
|
|
hp:=self;
|
|
while assigned(hp) do
|
|
begin
|
|
inserttypeconv(hp.left,tt);
|
|
hp:=tarrayconstructornode(hp.right);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tarrayconstructornode.insert_typeconvs;
|
|
var
|
|
hp : tarrayconstructornode;
|
|
dovariant : boolean;
|
|
begin
|
|
dovariant:=(nf_forcevaria in flags) or tarraydef(resulttype.def).isvariant;
|
|
{ only pass left tree, right tree contains next construct if any }
|
|
if assigned(left) then
|
|
begin
|
|
hp:=self;
|
|
while assigned(hp) do
|
|
begin
|
|
resulttypepass(hp.left);
|
|
{ Insert typeconvs for array of const }
|
|
if dovariant then
|
|
begin
|
|
case hp.left.resulttype.def.deftype of
|
|
enumdef :
|
|
hp.left:=ctypeconvnode.create_internal(hp.left,s32inttype);
|
|
arraydef :
|
|
begin
|
|
if is_chararray(hp.left.resulttype.def) then
|
|
hp.left:=ctypeconvnode.create_internal(hp.left,charpointertype)
|
|
else
|
|
if is_widechararray(hp.left.resulttype.def) then
|
|
hp.left:=ctypeconvnode.create_internal(hp.left,widecharpointertype)
|
|
else
|
|
CGMessagePos1(hp.left.fileinfo,type_e_wrong_type_in_array_constructor,hp.left.resulttype.def.typename);
|
|
end;
|
|
orddef :
|
|
begin
|
|
if is_integer(hp.left.resulttype.def) and
|
|
not(is_64bitint(hp.left.resulttype.def)) then
|
|
hp.left:=ctypeconvnode.create(hp.left,s32inttype);
|
|
end;
|
|
floatdef :
|
|
if not(is_currency(hp.left.resulttype.def)) then
|
|
hp.left:=ctypeconvnode.create(hp.left,pbestrealtype^);
|
|
procvardef :
|
|
hp.left:=ctypeconvnode.create(hp.left,voidpointertype);
|
|
stringdef,
|
|
variantdef,
|
|
pointerdef,
|
|
classrefdef:
|
|
;
|
|
objectdef :
|
|
if is_object(hp.left.resulttype.def) then
|
|
CGMessagePos1(hp.left.fileinfo,type_e_wrong_type_in_array_constructor,hp.left.resulttype.def.typename);
|
|
else
|
|
CGMessagePos1(hp.left.fileinfo,type_e_wrong_type_in_array_constructor,hp.left.resulttype.def.typename);
|
|
end;
|
|
end;
|
|
resulttypepass(hp.left);
|
|
hp:=tarrayconstructornode(hp.right);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
function tarrayconstructornode.pass_1 : tnode;
|
|
var
|
|
hp : tarrayconstructornode;
|
|
do_variant:boolean;
|
|
begin
|
|
do_variant:=(nf_forcevaria in flags) or tarraydef(resulttype.def).isvariant;
|
|
result:=nil;
|
|
{ Insert required type convs, this must be
|
|
done in pass 1, because the call must be
|
|
resulttypepassed already }
|
|
if assigned(left) then
|
|
begin
|
|
insert_typeconvs;
|
|
{ call firstpass for all nodes }
|
|
hp:=self;
|
|
while assigned(hp) do
|
|
begin
|
|
if hp.left<>nil then
|
|
begin
|
|
{This check is pessimistic; a call will happen depending
|
|
on the location in which the elements will be found in
|
|
pass 2.}
|
|
if not do_variant then
|
|
include(current_procinfo.flags,pi_do_call);
|
|
firstpass(hp.left);
|
|
end;
|
|
hp:=tarrayconstructornode(hp.right);
|
|
end;
|
|
end;
|
|
expectloc:=LOC_CREFERENCE;
|
|
calcregisters(self,0,0,0);
|
|
end;
|
|
|
|
|
|
function tarrayconstructornode.docompare(p: tnode): boolean;
|
|
|
|
begin
|
|
docompare:=inherited docompare(p);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TTYPENODE
|
|
*****************************************************************************}
|
|
|
|
constructor ttypenode.create(t : ttype);
|
|
begin
|
|
inherited create(typen);
|
|
restype:=t;
|
|
allowed:=false;
|
|
end;
|
|
|
|
|
|
constructor ttypenode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
ppufile.gettype(restype);
|
|
allowed:=boolean(ppufile.getbyte);
|
|
end;
|
|
|
|
|
|
procedure ttypenode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.puttype(restype);
|
|
ppufile.putbyte(byte(allowed));
|
|
end;
|
|
|
|
|
|
procedure ttypenode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
restype.buildderef;
|
|
end;
|
|
|
|
|
|
procedure ttypenode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
restype.resolve;
|
|
end;
|
|
|
|
|
|
function ttypenode.det_resulttype:tnode;
|
|
begin
|
|
result:=nil;
|
|
resulttype:=restype;
|
|
{ check if it's valid }
|
|
if restype.def.deftype = errordef then
|
|
CGMessage(parser_e_illegal_expression);
|
|
end;
|
|
|
|
|
|
function ttypenode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
{ a typenode can't generate code, so we give here
|
|
an error. Else it'll be an abstract error in pass_2.
|
|
Only when the allowed flag is set we don't generate
|
|
an error }
|
|
if not allowed then
|
|
Message(parser_e_no_type_not_allowed_here);
|
|
end;
|
|
|
|
|
|
function ttypenode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TRTTINODE
|
|
*****************************************************************************}
|
|
|
|
|
|
constructor trttinode.create(def:tstoreddef;rt:trttitype);
|
|
begin
|
|
inherited create(rttin);
|
|
rttidef:=def;
|
|
rttitype:=rt;
|
|
end;
|
|
|
|
|
|
constructor trttinode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
ppufile.getderef(rttidefderef);
|
|
rttitype:=trttitype(ppufile.getbyte);
|
|
end;
|
|
|
|
|
|
procedure trttinode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.putderef(rttidefderef);
|
|
ppufile.putbyte(byte(rttitype));
|
|
end;
|
|
|
|
|
|
procedure trttinode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
rttidefderef.build(rttidef);
|
|
end;
|
|
|
|
|
|
procedure trttinode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
rttidef:=tstoreddef(rttidefderef.resolve);
|
|
end;
|
|
|
|
|
|
function trttinode._getcopy : tnode;
|
|
var
|
|
n : trttinode;
|
|
begin
|
|
n:=trttinode(inherited _getcopy);
|
|
n.rttidef:=rttidef;
|
|
n.rttitype:=rttitype;
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
function trttinode.det_resulttype:tnode;
|
|
begin
|
|
{ rtti information will be returned as a void pointer }
|
|
result:=nil;
|
|
resulttype:=voidpointertype;
|
|
end;
|
|
|
|
|
|
function trttinode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_CREFERENCE;
|
|
end;
|
|
|
|
|
|
function trttinode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
(rttidef = trttinode(p).rttidef) and
|
|
(rttitype = trttinode(p).rttitype);
|
|
end;
|
|
|
|
|
|
begin
|
|
cloadnode:=tloadnode;
|
|
cassignmentnode:=tassignmentnode;
|
|
carrayconstructorrangenode:=tarrayconstructorrangenode;
|
|
carrayconstructornode:=tarrayconstructornode;
|
|
ctypenode:=ttypenode;
|
|
crttinode:=trttinode;
|
|
end.
|