mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 14:39:36 +01:00
20c3809c3a
the methodpointer of a call, transform it into a call to the classclass
method because otherwise it can be used before the first call to any
method of the class (such as in the packages/cocoaint/src/IvarSize test)
and this can result in crashes
git-svn-id: trunk@18124 -
1071 lines
37 KiB
ObjectPascal
1071 lines
37 KiB
ObjectPascal
{
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Copyright (c) 2000-2002 by Florian Klaempfl
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Type checking and register allocation for memory related 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 nmem;
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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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symdef,symsym,symtable,symtype;
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type
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tloadvmtaddrnode = class(tunarynode)
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{ unless this is for a call, we have to send the "class" message to
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the objctype because the type information only gets initialized
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after the first message has been sent -> crash if you pass an
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uninitialized type to e.g. class_getInstanceSize() or so. No need
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to save to/restore from ppu. }
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forcall: boolean;
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constructor create(l : tnode);virtual;
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function pass_1 : tnode;override;
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function pass_typecheck:tnode;override;
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function docompare(p: tnode): boolean; override;
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function dogetcopy: tnode; override;
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end;
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tloadvmtaddrnodeclass = class of tloadvmtaddrnode;
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tloadparentfpnode = class(tunarynode)
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parentpd : tprocdef;
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parentpdderef : tderef;
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constructor create(pd:tprocdef);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 pass_typecheck:tnode;override;
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function docompare(p: tnode): boolean; override;
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function dogetcopy : tnode;override;
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end;
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tloadparentfpnodeclass = class of tloadparentfpnode;
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taddrnode = class(tunarynode)
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getprocvardef : tprocvardef;
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getprocvardefderef : tderef;
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constructor create(l : tnode);virtual;
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constructor create_internal(l : tnode); virtual;
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constructor create_internal_nomark(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 mark_write;override;
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procedure buildderefimpl;override;
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procedure derefimpl;override;
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function docompare(p: tnode): boolean; override;
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function dogetcopy : tnode;override;
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function pass_1 : tnode;override;
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function pass_typecheck:tnode;override;
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private
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mark_read_written: boolean;
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end;
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taddrnodeclass = class of taddrnode;
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tderefnode = class(tunarynode)
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constructor create(l : tnode);virtual;
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function pass_1 : tnode;override;
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function pass_typecheck:tnode;override;
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procedure mark_write;override;
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end;
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tderefnodeclass = class of tderefnode;
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tsubscriptnode = class(tunarynode)
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vs : tfieldvarsym;
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vsderef : tderef;
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constructor create(varsym : tsym;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 dogetcopy : 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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function pass_typecheck:tnode;override;
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procedure mark_write;override;
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end;
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tsubscriptnodeclass = class of tsubscriptnode;
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tvecnode = 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 pass_typecheck:tnode;override;
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procedure mark_write;override;
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end;
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tvecnodeclass = class of tvecnode;
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twithnode = class(tunarynode)
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constructor create(l:tnode);
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destructor destroy;override;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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procedure ppuwrite(ppufile:tcompilerppufile);override;
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function dogetcopy : 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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function pass_typecheck:tnode;override;
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end;
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twithnodeclass = class of twithnode;
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var
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cloadvmtaddrnode : tloadvmtaddrnodeclass= tloadvmtaddrnode;
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caddrnode : taddrnodeclass= taddrnode;
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cderefnode : tderefnodeclass= tderefnode;
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csubscriptnode : tsubscriptnodeclass= tsubscriptnode;
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cvecnode : tvecnodeclass= tvecnode;
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cwithnode : twithnodeclass= twithnode;
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cloadparentfpnode : tloadparentfpnodeclass = tloadparentfpnode;
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function is_big_untyped_addrnode(p: tnode): boolean;
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implementation
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uses
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globtype,systems,constexp,
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cutils,verbose,globals,
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symconst,symbase,defutil,defcmp,
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nbas,nutils,
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wpobase,
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htypechk,pass_1,ncal,nld,ncon,ncnv,cgbase,procinfo
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;
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{*****************************************************************************
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TLOADVMTADDRNODE
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*****************************************************************************}
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constructor tloadvmtaddrnode.create(l : tnode);
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begin
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inherited create(loadvmtaddrn,l);
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end;
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function tloadvmtaddrnode.pass_typecheck:tnode;
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var
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defaultresultdef : boolean;
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begin
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result:=nil;
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typecheckpass(left);
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if codegenerror then
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exit;
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case left.resultdef.typ of
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classrefdef :
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resultdef:=left.resultdef;
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objectdef,
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recorddef:
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{ access to the classtype while specializing? }
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if (df_generic in left.resultdef.defoptions) then
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begin
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defaultresultdef:=true;
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if assigned(current_structdef) then
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begin
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if assigned(current_structdef.genericdef) then
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if current_structdef.genericdef=left.resultdef then
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begin
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resultdef:=tclassrefdef.create(current_structdef);
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defaultresultdef:=false;
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end
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else
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message(parser_e_cant_create_generics_of_this_type);
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end
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else
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message(parser_e_cant_create_generics_of_this_type);
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if defaultresultdef then
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resultdef:=tclassrefdef.create(left.resultdef);
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end
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else
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resultdef:=tclassrefdef.create(left.resultdef);
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else
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Message(parser_e_pointer_to_class_expected);
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end;
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end;
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function tloadvmtaddrnode.docompare(p: tnode): boolean;
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begin
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result:=inherited docompare(p);
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if result then
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result:=forcall=tloadvmtaddrnode(p).forcall;
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end;
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function tloadvmtaddrnode.dogetcopy: tnode;
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begin
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result:=inherited dogetcopy;
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tloadvmtaddrnode(result).forcall:=forcall;
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end;
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function tloadvmtaddrnode.pass_1 : tnode;
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var
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vs: tsym;
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begin
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result:=nil;
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expectloc:=LOC_REGISTER;
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if left.nodetype<>typen then
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begin
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{ make sure that the isa field is loaded correctly in case
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of the non-fragile ABI }
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if is_objcclass(left.resultdef) and
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(left.nodetype<>typen) then
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begin
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vs:=search_struct_member(tobjectdef(left.resultdef),'ISA');
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if not assigned(vs) or
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(tsym(vs).typ<>fieldvarsym) then
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internalerror(2009092502);
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result:=csubscriptnode.create(tfieldvarsym(vs),left);
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inserttypeconv_internal(result,resultdef);
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{ reused }
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left:=nil;
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end
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else
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firstpass(left)
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end
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else if not is_objcclass(left.resultdef) and
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not is_objcclassref(left.resultdef) then
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begin
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if not(nf_ignore_for_wpo in flags) and
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(not assigned(current_procinfo) or
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(po_inline in current_procinfo.procdef.procoptions) or
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wpoinfomanager.symbol_live(current_procinfo.procdef.mangledname)) then
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begin
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{ keep track of which classes might be instantiated via a classrefdef }
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if (left.resultdef.typ=classrefdef) then
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tobjectdef(tclassrefdef(left.resultdef).pointeddef).register_maybe_created_object_type
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else if (left.resultdef.typ=objectdef) then
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tobjectdef(left.resultdef).register_maybe_created_object_type
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end
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end
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else if is_objcclass(left.resultdef) and
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not(forcall) then
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begin
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{ call "class" method (= "classclass" in FPC), because otherwise
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we may use the class information before it has been
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initialized }
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vs:=search_struct_member(tobjectdef(left.resultdef),'CLASSCLASS');
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if not assigned(vs) or
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(vs.typ<>procsym) then
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internalerror(2011080601);
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{ can't reuse "self", because it will be freed when we return }
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result:=ccallnode.create(nil,tprocsym(vs),vs.owner,self.getcopy,[]);
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end;
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end;
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{*****************************************************************************
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TLOADPARENTFPNODE
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*****************************************************************************}
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constructor tloadparentfpnode.create(pd:tprocdef);
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begin
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inherited create(loadparentfpn,nil);
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if not assigned(pd) then
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internalerror(200309288);
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if (pd.parast.symtablelevel>current_procinfo.procdef.parast.symtablelevel) then
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internalerror(200309284);
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parentpd:=pd;
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end;
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constructor tloadparentfpnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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ppufile.getderef(parentpdderef);
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end;
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procedure tloadparentfpnode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppufile.putderef(parentpdderef);
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end;
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procedure tloadparentfpnode.buildderefimpl;
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begin
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inherited buildderefimpl;
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parentpdderef.build(parentpd);
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end;
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procedure tloadparentfpnode.derefimpl;
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begin
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inherited derefimpl;
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parentpd:=tprocdef(parentpdderef.resolve);
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end;
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function tloadparentfpnode.docompare(p: tnode): boolean;
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begin
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result:=
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inherited docompare(p) and
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(tloadparentfpnode(p).parentpd=parentpd);
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end;
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function tloadparentfpnode.dogetcopy : tnode;
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var
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p : tloadparentfpnode;
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begin
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p:=tloadparentfpnode(inherited dogetcopy);
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p.parentpd:=parentpd;
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dogetcopy:=p;
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end;
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function tloadparentfpnode.pass_typecheck:tnode;
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{$ifdef dummy}
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var
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currpi : tprocinfo;
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hsym : tparavarsym;
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{$endif dummy}
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begin
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result:=nil;
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resultdef:=voidpointertype;
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{$ifdef dummy}
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{ currently parentfps are never loaded in registers (FK) }
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if (current_procinfo.procdef.parast.symtablelevel<>parentpd.parast.symtablelevel) then
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begin
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currpi:=current_procinfo;
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{ walk parents }
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while (currpi.procdef.owner.symtablelevel>parentpd.parast.symtablelevel) do
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begin
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currpi:=currpi.parent;
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if not assigned(currpi) then
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internalerror(2005040602);
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hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
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if not assigned(hsym) then
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internalerror(2005040601);
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hsym.varregable:=vr_none;
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end;
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end;
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{$endif dummy}
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end;
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function tloadparentfpnode.pass_1 : tnode;
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begin
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result:=nil;
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expectloc:=LOC_REGISTER;
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end;
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{*****************************************************************************
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TADDRNODE
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*****************************************************************************}
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constructor taddrnode.create(l : tnode);
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begin
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inherited create(addrn,l);
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getprocvardef:=nil;
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mark_read_written := true;
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end;
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constructor taddrnode.create_internal(l : tnode);
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begin
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self.create(l);
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include(flags,nf_internal);
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end;
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constructor taddrnode.create_internal_nomark(l : tnode);
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begin
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self.create_internal(l);
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mark_read_written := false;
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end;
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constructor taddrnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
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begin
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inherited ppuload(t,ppufile);
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ppufile.getderef(getprocvardefderef);
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end;
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procedure taddrnode.ppuwrite(ppufile:tcompilerppufile);
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begin
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inherited ppuwrite(ppufile);
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ppufile.putderef(getprocvardefderef);
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end;
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procedure Taddrnode.mark_write;
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begin
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{@procvar:=nil is legal in Delphi mode.}
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left.mark_write;
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end;
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procedure taddrnode.buildderefimpl;
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begin
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inherited buildderefimpl;
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getprocvardefderef.build(getprocvardef);
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end;
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procedure taddrnode.derefimpl;
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begin
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inherited derefimpl;
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getprocvardef:=tprocvardef(getprocvardefderef.resolve);
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end;
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function taddrnode.docompare(p: tnode): boolean;
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begin
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result:=
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inherited docompare(p) and
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(taddrnode(p).getprocvardef=getprocvardef);
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end;
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function taddrnode.dogetcopy : tnode;
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var
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p : taddrnode;
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begin
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p:=taddrnode(inherited dogetcopy);
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p.getprocvardef:=getprocvardef;
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dogetcopy:=p;
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end;
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function taddrnode.pass_typecheck:tnode;
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var
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hp : tnode;
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hsym : tfieldvarsym;
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isprocvar : boolean;
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begin
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result:=nil;
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typecheckpass(left);
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if codegenerror then
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exit;
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make_not_regable(left,[ra_addr_regable,ra_addr_taken]);
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{ don't allow constants, for internal use we also
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allow taking the address of strings }
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if is_constnode(left) and
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not(
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(nf_internal in flags) and
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(left.nodetype in [stringconstn])
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) then
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begin
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CGMessagePos(left.fileinfo,type_e_no_addr_of_constant);
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exit;
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end;
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|
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{ Handle @proc special, also @procvar in tp-mode needs
|
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special handling }
|
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if (left.resultdef.typ=procdef) or
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(
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(left.resultdef.typ=procvardef) and
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((m_tp_procvar in current_settings.modeswitches) or
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(m_mac_procvar in current_settings.modeswitches))
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) then
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begin
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isprocvar:=(left.resultdef.typ=procvardef);
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if not isprocvar then
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begin
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left:=ctypeconvnode.create_proc_to_procvar(left);
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left.fileinfo:=fileinfo;
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typecheckpass(left);
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end;
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|
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{ In tp procvar mode the result is always a voidpointer. Insert
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a typeconversion to voidpointer. For methodpointers we need
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to load the proc field }
|
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if (m_tp_procvar in current_settings.modeswitches) or
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|
(m_mac_procvar in current_settings.modeswitches) then
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begin
|
|
if tabstractprocdef(left.resultdef).is_addressonly then
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begin
|
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result:=ctypeconvnode.create_internal(left,voidpointertype);
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include(result.flags,nf_load_procvar);
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left:=nil;
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end
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else
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begin
|
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{ For procvars and for nested routines we need to return
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the proc field of the methodpointer }
|
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if isprocvar or
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is_nested_pd(tabstractprocdef(left.resultdef)) then
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begin
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{ find proc field in methodpointer record }
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hsym:=tfieldvarsym(trecorddef(methodpointertype).symtable.Find('proc'));
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if not assigned(hsym) then
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internalerror(200412041);
|
|
{ Load tmehodpointer(left).proc }
|
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result:=csubscriptnode.create(
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hsym,
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ctypeconvnode.create_internal(left,methodpointertype));
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left:=nil;
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end
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|
else
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CGMessage(type_e_variable_id_expected);
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end;
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end
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else
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begin
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{ Return the typeconvn only }
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result:=left;
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left:=nil;
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end;
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end
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else
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begin
|
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{ what are we getting the address from an absolute sym? }
|
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hp:=left;
|
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while assigned(hp) and (hp.nodetype in [typeconvn,vecn,derefn,subscriptn]) do
|
|
hp:=tunarynode(hp).left;
|
|
if not assigned(hp) then
|
|
internalerror(200412042);
|
|
{$ifdef i386}
|
|
if (hp.nodetype=loadn) and
|
|
((tloadnode(hp).symtableentry.typ=absolutevarsym) and
|
|
tabsolutevarsym(tloadnode(hp).symtableentry).absseg) then
|
|
begin
|
|
if not(nf_typedaddr in flags) then
|
|
resultdef:=voidfarpointertype
|
|
else
|
|
resultdef:=tpointerdef.createfar(left.resultdef);
|
|
end
|
|
else
|
|
{$endif i386}
|
|
if (hp.nodetype=loadn) and
|
|
(tloadnode(hp).symtableentry.typ=absolutevarsym) and
|
|
{$ifdef i386}
|
|
not(tabsolutevarsym(tloadnode(hp).symtableentry).absseg) and
|
|
{$endif i386}
|
|
(tabsolutevarsym(tloadnode(hp).symtableentry).abstyp=toaddr) then
|
|
begin
|
|
if nf_typedaddr in flags then
|
|
result:=cpointerconstnode.create(tabsolutevarsym(tloadnode(hp).symtableentry).addroffset,tpointerdef.create(left.resultdef))
|
|
else
|
|
result:=cpointerconstnode.create(tabsolutevarsym(tloadnode(hp).symtableentry).addroffset,voidpointertype);
|
|
exit;
|
|
end
|
|
else if (nf_internal in flags) or
|
|
valid_for_addr(left,true) then
|
|
begin
|
|
if not(nf_typedaddr in flags) then
|
|
resultdef:=voidpointertype
|
|
else
|
|
resultdef:=tpointerdef.create(left.resultdef);
|
|
end
|
|
else
|
|
CGMessage(type_e_variable_id_expected);
|
|
end;
|
|
|
|
if mark_read_written then
|
|
begin
|
|
{ This is actually only "read", but treat it nevertheless as }
|
|
{ modified due to the possible use of pointers }
|
|
{ To avoid false positives regarding "uninitialised" }
|
|
{ warnings when using arrays, perform it in two steps }
|
|
set_varstate(left,vs_written,[]);
|
|
{ vsf_must_be_valid so it doesn't get changed into }
|
|
{ vsf_referred_not_inited }
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
end;
|
|
end;
|
|
|
|
|
|
function taddrnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
firstpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ is this right for object of methods ?? }
|
|
expectloc:=LOC_REGISTER;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TDEREFNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tderefnode.create(l : tnode);
|
|
|
|
begin
|
|
inherited create(derefn,l);
|
|
|
|
end;
|
|
|
|
function tderefnode.pass_typecheck:tnode;
|
|
begin
|
|
result:=nil;
|
|
typecheckpass(left);
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ tp procvar support }
|
|
maybe_call_procvar(left,true);
|
|
|
|
if left.resultdef.typ=pointerdef then
|
|
resultdef:=tpointerdef(left.resultdef).pointeddef
|
|
else
|
|
CGMessage(parser_e_invalid_qualifier);
|
|
end;
|
|
|
|
procedure Tderefnode.mark_write;
|
|
|
|
begin
|
|
include(flags,nf_write);
|
|
end;
|
|
|
|
function tderefnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
firstpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
expectloc:=LOC_REFERENCE;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TSUBSCRIPTNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tsubscriptnode.create(varsym : tsym;l : tnode);
|
|
|
|
begin
|
|
inherited create(subscriptn,l);
|
|
{ vs should be changed to tsym! }
|
|
vs:=tfieldvarsym(varsym);
|
|
end;
|
|
|
|
constructor tsubscriptnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
ppufile.getderef(vsderef);
|
|
end;
|
|
|
|
|
|
procedure tsubscriptnode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.putderef(vsderef);
|
|
end;
|
|
|
|
|
|
procedure tsubscriptnode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
vsderef.build(vs);
|
|
end;
|
|
|
|
|
|
procedure tsubscriptnode.derefimpl;
|
|
begin
|
|
inherited derefimpl;
|
|
vs:=tfieldvarsym(vsderef.resolve);
|
|
end;
|
|
|
|
|
|
function tsubscriptnode.dogetcopy : tnode;
|
|
var
|
|
p : tsubscriptnode;
|
|
begin
|
|
p:=tsubscriptnode(inherited dogetcopy);
|
|
p.vs:=vs;
|
|
dogetcopy:=p;
|
|
end;
|
|
|
|
|
|
function tsubscriptnode.pass_typecheck:tnode;
|
|
begin
|
|
result:=nil;
|
|
typecheckpass(left);
|
|
{ tp procvar support }
|
|
maybe_call_procvar(left,true);
|
|
resultdef:=vs.vardef;
|
|
|
|
// don't put records from which we load float fields
|
|
// in integer registers
|
|
if (left.resultdef.typ=recorddef) and
|
|
(resultdef.typ=floatdef) then
|
|
make_not_regable(left,[ra_addr_regable]);
|
|
end;
|
|
|
|
procedure Tsubscriptnode.mark_write;
|
|
begin
|
|
include(flags,nf_write);
|
|
end;
|
|
|
|
|
|
function tsubscriptnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
firstpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ several object types must be dereferenced implicitly }
|
|
if is_implicit_pointer_object_type(left.resultdef) then
|
|
expectloc:=LOC_REFERENCE
|
|
else
|
|
begin
|
|
case left.expectloc of
|
|
LOC_REGISTER,
|
|
LOC_SUBSETREG:
|
|
// can happen for function results on win32 and darwin/x86
|
|
if (left.resultdef.size > sizeof(pint)) then
|
|
expectloc:=LOC_REFERENCE
|
|
else
|
|
expectloc:=LOC_SUBSETREG;
|
|
LOC_CREGISTER,
|
|
LOC_CSUBSETREG:
|
|
expectloc:=LOC_CSUBSETREG;
|
|
LOC_REFERENCE,
|
|
LOC_CREFERENCE:
|
|
expectloc:=left.expectloc;
|
|
else internalerror(20060521);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
function tsubscriptnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
(vs = tsubscriptnode(p).vs);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TVECNODE
|
|
*****************************************************************************}
|
|
|
|
constructor tvecnode.create(l,r : tnode);
|
|
|
|
begin
|
|
inherited create(vecn,l,r);
|
|
end;
|
|
|
|
|
|
function tvecnode.pass_typecheck:tnode;
|
|
var
|
|
hightree: tnode;
|
|
htype,elementdef : tdef;
|
|
valid : boolean;
|
|
begin
|
|
result:=nil;
|
|
typecheckpass(left);
|
|
typecheckpass(right);
|
|
|
|
{ implicitly convert stringconstant to stringdef,
|
|
see tbs/tb0476.pp for a test }
|
|
if (left.nodetype=stringconstn) and
|
|
(tstringconstnode(left).cst_type=cst_conststring) then
|
|
begin
|
|
if tstringconstnode(left).len>255 then
|
|
inserttypeconv(left,cansistringtype)
|
|
else
|
|
inserttypeconv(left,cshortstringtype);
|
|
end;
|
|
|
|
{ In p[1] p is always valid, it is not possible to
|
|
declared a shortstring or normal array that has
|
|
undefined number of elements. Dynamic array and
|
|
ansi/widestring needs to be valid }
|
|
valid:=is_dynamic_array(left.resultdef) or
|
|
is_ansistring(left.resultdef) or
|
|
is_wide_or_unicode_string(left.resultdef) or
|
|
{ implicit pointer dereference -> pointer is read }
|
|
(left.resultdef.typ = pointerdef);
|
|
if valid then
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
{
|
|
A vecn is, just like a loadn, always part of an expression with its
|
|
own read/write and must_be_valid semantics. Therefore we don't have
|
|
to do anything else here, just like for loadn's
|
|
}
|
|
set_varstate(right,vs_read,[vsf_must_be_valid]);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ maybe type conversion for the index value, but
|
|
do not convert enums, char (why not? (JM))
|
|
and do not convert range nodes }
|
|
if (right.nodetype<>rangen) and (is_integer(right.resultdef) or is_boolean(right.resultdef) or (left.resultdef.typ<>arraydef)) then
|
|
case left.resultdef.typ of
|
|
arraydef:
|
|
if ado_isvariant in Tarraydef(left.resultdef).arrayoptions then
|
|
{Variant arrays are a special array, can have negative indexes and would therefore
|
|
need s32bit. However, they should not appear in a vecn, as they are handled in
|
|
handle_variantarray in pexpr.pas. Therefore, encountering a variant array is an
|
|
internal error... }
|
|
internalerror(200707031)
|
|
else if is_special_array(left.resultdef) then
|
|
{Arrays without a high bound (dynamic arrays, open arrays) are zero based,
|
|
convert indexes into these arrays to aword.}
|
|
inserttypeconv(right,uinttype)
|
|
{ convert between pasbool and cbool if necessary }
|
|
else if is_boolean(right.resultdef) then
|
|
inserttypeconv(right,tarraydef(left.resultdef).rangedef)
|
|
else
|
|
{Convert array indexes to low_bound..high_bound.}
|
|
inserttypeconv(right,Torddef.create(Torddef(sinttype).ordtype,
|
|
int64(Tarraydef(left.resultdef).lowrange),
|
|
int64(Tarraydef(left.resultdef).highrange)
|
|
));
|
|
stringdef:
|
|
if is_open_string(left.resultdef) then
|
|
inserttypeconv(right,u8inttype)
|
|
else if is_shortstring(left.resultdef) then
|
|
{Convert shortstring indexes to 0..length.}
|
|
inserttypeconv(right,Torddef.create(u8bit,0,int64(Tstringdef(left.resultdef).len)))
|
|
else
|
|
{Convert indexes into dynamically allocated strings to aword.}
|
|
inserttypeconv(right,uinttype);
|
|
else
|
|
{Others, i.e. pointer indexes to aint.}
|
|
inserttypeconv(right,sinttype);
|
|
end;
|
|
|
|
{ although we never put regular arrays or shortstrings in registers,
|
|
it's possible that another type was typecasted to a small record
|
|
that has a field of one of these types -> in that case the record
|
|
can't be a regvar either }
|
|
if ((left.resultdef.typ=arraydef) and
|
|
not is_special_array(left.resultdef)) or
|
|
((left.resultdef.typ=stringdef) and
|
|
(tstringdef(left.resultdef).stringtype in [st_shortstring,st_longstring])) then
|
|
make_not_regable(left,[ra_addr_regable]);
|
|
|
|
case left.resultdef.typ of
|
|
arraydef :
|
|
begin
|
|
{ check type of the index value }
|
|
if (compare_defs(right.resultdef,tarraydef(left.resultdef).rangedef,right.nodetype)=te_incompatible) then
|
|
IncompatibleTypes(right.resultdef,tarraydef(left.resultdef).rangedef);
|
|
if right.nodetype=rangen then
|
|
resultdef:=left.resultdef
|
|
else
|
|
resultdef:=Tarraydef(left.resultdef).elementdef;
|
|
|
|
{ if we are range checking an open array or array of const, we }
|
|
{ need to load the high parameter. If the current procedure is }
|
|
{ nested inside the procedure to which the open array/of const }
|
|
{ was passed, then the high parameter must not be a regvar. }
|
|
{ So create a loadnode for the high parameter here and }
|
|
{ typecheck it, then the loadnode will make the high parameter }
|
|
{ not regable. Otherwise this would only happen inside pass_2, }
|
|
{ which is too late since by then the regvars are already }
|
|
{ assigned (pass_1 is also already too late, because then the }
|
|
{ regvars of the parent are also already assigned). }
|
|
{ webtbs/tw8975 }
|
|
if (cs_check_range in current_settings.localswitches) and
|
|
(is_open_array(left.resultdef) or
|
|
is_array_of_const(left.resultdef)) and
|
|
{ cdecl functions don't have high() so we can not check the range }
|
|
{ (can't use current_procdef, since it may be a nested procedure) }
|
|
not(tprocdef(tparasymtable(tparavarsym(tloadnode(left).symtableentry).owner).defowner).proccalloption in cdecl_pocalls) then
|
|
begin
|
|
{ load_high_value_node already typechecks }
|
|
hightree:=load_high_value_node(tparavarsym(tloadnode(left).symtableentry));
|
|
hightree.free;
|
|
end;
|
|
|
|
|
|
end;
|
|
pointerdef :
|
|
begin
|
|
{ are we accessing a pointer[], then convert the pointer to
|
|
an array first, in FPC this is allowed for all pointers
|
|
(except voidpointer) in delphi/tp7 it's only allowed for pchars. }
|
|
if not is_voidpointer(left.resultdef) and
|
|
(
|
|
(cs_pointermath in current_settings.localswitches) or
|
|
tpointerdef(left.resultdef).has_pointer_math or
|
|
is_pchar(left.resultdef) or
|
|
is_pwidechar(left.resultdef)
|
|
) then
|
|
begin
|
|
{ convert pointer to array }
|
|
htype:=tarraydef.create_from_pointer(tpointerdef(left.resultdef).pointeddef);
|
|
inserttypeconv(left,htype);
|
|
if right.nodetype=rangen then
|
|
resultdef:=htype
|
|
else
|
|
resultdef:=tarraydef(htype).elementdef;
|
|
end
|
|
else
|
|
CGMessage(type_e_array_required);
|
|
end;
|
|
stringdef :
|
|
begin
|
|
case tstringdef(left.resultdef).stringtype of
|
|
st_unicodestring,
|
|
st_widestring :
|
|
elementdef:=cwidechartype;
|
|
st_ansistring :
|
|
elementdef:=cchartype;
|
|
st_longstring :
|
|
elementdef:=cchartype;
|
|
st_shortstring :
|
|
elementdef:=cchartype;
|
|
end;
|
|
if right.nodetype=rangen then
|
|
begin
|
|
htype:=Tarraydef.create_from_pointer(elementdef);
|
|
resultdef:=htype;
|
|
end
|
|
else
|
|
begin
|
|
{ indexed access to 0 element is only allowed for shortstrings }
|
|
if (right.nodetype=ordconstn) and
|
|
(Tordconstnode(right).value.svalue=0) and
|
|
not is_shortstring(left.resultdef) then
|
|
CGMessage(cg_e_can_access_element_zero);
|
|
resultdef:=elementdef;
|
|
end;
|
|
end;
|
|
variantdef :
|
|
resultdef:=cvarianttype;
|
|
else
|
|
CGMessage(type_e_array_required);
|
|
end;
|
|
end;
|
|
|
|
procedure Tvecnode.mark_write;
|
|
|
|
begin
|
|
include(flags,nf_write);
|
|
end;
|
|
|
|
function tvecnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
firstpass(left);
|
|
firstpass(right);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
if (nf_callunique in flags) and
|
|
(is_ansistring(left.resultdef) or
|
|
is_unicodestring(left.resultdef) or
|
|
(is_widestring(left.resultdef) and not(tf_winlikewidestring in target_info.flags))) then
|
|
begin
|
|
left := ctypeconvnode.create_internal(ccallnode.createintern('fpc_'+tstringdef(left.resultdef).stringtypname+'_unique',
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(left,voidpointertype),nil)),
|
|
left.resultdef);
|
|
firstpass(left);
|
|
{ double resultdef passes somwhere else may cause this to be }
|
|
{ reset though :/ }
|
|
exclude(flags,nf_callunique);
|
|
end
|
|
else if is_widestring(left.resultdef) and (tf_winlikewidestring in target_info.flags) then
|
|
exclude(flags,nf_callunique);
|
|
|
|
{ a range node as array index can only appear in function calls, and
|
|
those convert the range node into something else in
|
|
tcallnode.gen_high_tree }
|
|
if (right.nodetype=rangen) then
|
|
CGMessagePos(right.fileinfo,parser_e_illegal_expression)
|
|
else if (not is_packed_array(left.resultdef)) or
|
|
((tarraydef(left.resultdef).elepackedbitsize mod 8) = 0) then
|
|
if left.expectloc=LOC_CREFERENCE then
|
|
expectloc:=LOC_CREFERENCE
|
|
else
|
|
expectloc:=LOC_REFERENCE
|
|
else
|
|
if left.expectloc=LOC_CREFERENCE then
|
|
expectloc:=LOC_CSUBSETREF
|
|
else
|
|
expectloc:=LOC_SUBSETREF;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TWITHNODE
|
|
*****************************************************************************}
|
|
|
|
constructor twithnode.create(l:tnode);
|
|
begin
|
|
inherited create(withn,l);
|
|
fileinfo:=l.fileinfo;
|
|
end;
|
|
|
|
|
|
destructor twithnode.destroy;
|
|
begin
|
|
inherited destroy;
|
|
end;
|
|
|
|
|
|
constructor twithnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
end;
|
|
|
|
|
|
procedure twithnode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
end;
|
|
|
|
|
|
function twithnode.dogetcopy : tnode;
|
|
var
|
|
p : twithnode;
|
|
begin
|
|
p:=twithnode(inherited dogetcopy);
|
|
result:=p;
|
|
end;
|
|
|
|
|
|
function twithnode.pass_typecheck:tnode;
|
|
begin
|
|
result:=nil;
|
|
resultdef:=voidtype;
|
|
if assigned(left) then
|
|
typecheckpass(left);
|
|
end;
|
|
|
|
|
|
function twithnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
expectloc:=LOC_VOID;
|
|
end;
|
|
|
|
|
|
function twithnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p);
|
|
end;
|
|
|
|
function is_big_untyped_addrnode(p: tnode): boolean;
|
|
begin
|
|
is_big_untyped_addrnode:=(p.nodetype=addrn) and
|
|
not (nf_typedaddr in p.flags) and (taddrnode(p).left.resultdef.size > 1);
|
|
end;
|
|
|
|
end.
|