mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 05:39:29 +01:00
1323 lines
55 KiB
ObjectPascal
1323 lines
55 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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Type checking and register allocation for call 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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{$ifdef FPC}
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{$goto on}
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{$endif FPC}
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unit tccal;
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interface
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uses
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symtable,tree;
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procedure gen_high_tree(p:ptree;openstring:boolean);
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procedure firstcallparan(var p : ptree;defcoll : pparaitem;do_count : boolean);
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procedure firstcalln(var p : ptree);
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procedure firstprocinline(var p : ptree);
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implementation
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uses
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globtype,systems,
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cobjects,verbose,globals,
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symconst,aasm,types,
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htypechk,pass_1,cpubase
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{$ifdef newcg}
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,cgbase
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,tgobj
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{$else newcg}
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,hcodegen
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{$ifdef i386}
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,tgeni386
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{$endif}
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{$ifdef m68k}
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,tgen68k
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{$endif m68k}
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{$endif newcg}
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;
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{*****************************************************************************
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FirstCallParaN
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*****************************************************************************}
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procedure gen_high_tree(p:ptree;openstring:boolean);
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var
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len : longint;
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st : psymtable;
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loadconst : boolean;
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begin
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if assigned(p^.hightree) then
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exit;
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len:=-1;
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loadconst:=true;
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case p^.left^.resulttype^.deftype of
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arraydef :
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begin
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if is_open_array(p^.left^.resulttype) or
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is_array_of_const(p^.left^.resulttype) then
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begin
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st:=p^.left^.symtable;
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getsymonlyin(st,'high'+pvarsym(p^.left^.symtableentry)^.name);
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p^.hightree:=genloadnode(pvarsym(srsym),st);
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loadconst:=false;
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end
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else
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begin
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{ this is an empty constructor }
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len:=parraydef(p^.left^.resulttype)^.highrange-
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parraydef(p^.left^.resulttype)^.lowrange;
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end;
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end;
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stringdef :
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begin
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if openstring then
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begin
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if is_open_string(p^.left^.resulttype) then
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begin
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st:=p^.left^.symtable;
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getsymonlyin(st,'high'+pvarsym(p^.left^.symtableentry)^.name);
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p^.hightree:=genloadnode(pvarsym(srsym),st);
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loadconst:=false;
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end
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else
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len:=pstringdef(p^.left^.resulttype)^.len;
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end
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else
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{ passing a string to an array of char }
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begin
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if (p^.left^.treetype=stringconstn) then
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begin
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len:=str_length(p^.left);
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if len>0 then
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dec(len);
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end
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else
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begin
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p^.hightree:=gennode(subn,geninlinenode(in_length_string,false,getcopy(p^.left)),
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genordinalconstnode(1,s32bitdef));
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firstpass(p^.hightree);
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p^.hightree:=gentypeconvnode(p^.hightree,s32bitdef);
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loadconst:=false;
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end;
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end;
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end;
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else
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len:=0;
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end;
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if loadconst then
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p^.hightree:=genordinalconstnode(len,s32bitdef);
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firstpass(p^.hightree);
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end;
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procedure firstcallparan(var p : ptree;defcoll : pparaitem;do_count : boolean);
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var
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old_get_para_resulttype : boolean;
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old_array_constructor : boolean;
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oldtype : pdef;
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{$ifdef extdebug}
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store_count_ref : boolean;
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{$endif def extdebug}
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{convtyp : tconverttype;}
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begin
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inc(parsing_para_level);
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{$ifdef extdebug}
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if do_count then
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begin
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store_count_ref:=count_ref;
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count_ref:=true;
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end;
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{$endif def extdebug}
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if assigned(p^.right) then
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begin
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if defcoll=nil then
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firstcallparan(p^.right,nil,do_count)
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else
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firstcallparan(p^.right,pparaitem(defcoll^.next),do_count);
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p^.registers32:=p^.right^.registers32;
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p^.registersfpu:=p^.right^.registersfpu;
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{$ifdef SUPPORT_MMX}
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p^.registersmmx:=p^.right^.registersmmx;
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{$endif}
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end;
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if defcoll=nil then
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begin
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old_array_constructor:=allow_array_constructor;
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old_get_para_resulttype:=get_para_resulttype;
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get_para_resulttype:=true;
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allow_array_constructor:=true;
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firstpass(p^.left);
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get_para_resulttype:=old_get_para_resulttype;
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allow_array_constructor:=old_array_constructor;
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if codegenerror then
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begin
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dec(parsing_para_level);
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exit;
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end;
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p^.resulttype:=p^.left^.resulttype;
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end
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{ if we know the routine which is called, then the type }
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{ conversions are inserted }
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else
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begin
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{ Do we need arrayconstructor -> set conversion, then insert
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it here before the arrayconstructor node breaks the tree
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with its conversions of enum->ord }
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if (p^.left^.treetype=arrayconstructn) and
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(defcoll^.paratype.def^.deftype=setdef) then
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p^.left:=gentypeconvnode(p^.left,defcoll^.paratype.def);
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{ set some settings needed for arrayconstructor }
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if is_array_constructor(p^.left^.resulttype) then
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begin
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if is_array_of_const(defcoll^.paratype.def) then
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begin
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if assigned(aktcallprocsym) and
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(pocall_cdecl in aktcallprocsym^.definition^.proccalloptions) and
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(po_external in aktcallprocsym^.definition^.procoptions) then
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p^.left^.cargs:=true;
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{ force variant array }
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p^.left^.forcevaria:=true;
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end
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else
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begin
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p^.left^.novariaallowed:=true;
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p^.left^.constructdef:=parraydef(defcoll^.paratype.def)^.elementtype.def;
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end;
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end;
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if do_count then
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begin
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{ not completly proper, but avoids some warnings }
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if (defcoll^.paratyp=vs_var) then
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set_funcret_is_valid(p^.left);
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{ protected has nothing to do with read/write
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if (defcoll^.paratyp=vs_var) then
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test_protected(p^.left);
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}
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{ set_varstate(p^.left,defcoll^.paratyp<>vs_var);
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must only be done after typeconv PM }
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{ only process typeconvn and arrayconstructn, else it will
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break other trees }
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{ But this is need to get correct varstate !! PM }
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old_array_constructor:=allow_array_constructor;
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old_get_para_resulttype:=get_para_resulttype;
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allow_array_constructor:=true;
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get_para_resulttype:=false;
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if (p^.left^.treetype in [arrayconstructn,typeconvn]) then
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firstpass(p^.left);
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if not assigned(p^.resulttype) then
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p^.resulttype:=p^.left^.resulttype;
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get_para_resulttype:=old_get_para_resulttype;
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allow_array_constructor:=old_array_constructor;
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end;
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{ check if local proc/func is assigned to procvar }
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if p^.left^.resulttype^.deftype=procvardef then
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test_local_to_procvar(pprocvardef(p^.left^.resulttype),defcoll^.paratype.def);
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{ property is not allowed as var parameter }
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if (defcoll^.paratyp=vs_var) and
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(p^.left^.isproperty) then
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CGMessagePos(p^.left^.fileinfo,type_e_argument_cant_be_assigned);
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{ generate the high() value tree }
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if push_high_param(defcoll^.paratype.def) then
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gen_high_tree(p,is_open_string(defcoll^.paratype.def));
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if not(is_shortstring(p^.left^.resulttype) and
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is_shortstring(defcoll^.paratype.def)) and
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(defcoll^.paratype.def^.deftype<>formaldef) then
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begin
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if (defcoll^.paratyp=vs_var) and
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{ allows conversion from word to integer and
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byte to shortint }
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(not(
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(p^.left^.resulttype^.deftype=orddef) and
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(defcoll^.paratype.def^.deftype=orddef) and
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(p^.left^.resulttype^.size=defcoll^.paratype.def^.size)
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) and
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{ an implicit pointer conversion is allowed }
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not(
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(p^.left^.resulttype^.deftype=pointerdef) and
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(defcoll^.paratype.def^.deftype=pointerdef)
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) and
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{ child classes can be also passed }
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not(
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(p^.left^.resulttype^.deftype=objectdef) and
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(defcoll^.paratype.def^.deftype=objectdef) and
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pobjectdef(p^.left^.resulttype)^.is_related(pobjectdef(defcoll^.paratype.def))
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) and
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{ passing a single element to a openarray of the same type }
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not(
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(is_open_array(defcoll^.paratype.def) and
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is_equal(parraydef(defcoll^.paratype.def)^.elementtype.def,p^.left^.resulttype))
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) and
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{ an implicit file conversion is also allowed }
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{ from a typed file to an untyped one }
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not(
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(p^.left^.resulttype^.deftype=filedef) and
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(defcoll^.paratype.def^.deftype=filedef) and
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(pfiledef(defcoll^.paratype.def)^.filetyp = ft_untyped) and
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(pfiledef(p^.left^.resulttype)^.filetyp = ft_typed)
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) and
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not(is_equal(p^.left^.resulttype,defcoll^.paratype.def))) then
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begin
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CGMessagePos2(p^.left^.fileinfo,parser_e_call_by_ref_without_typeconv,
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p^.left^.resulttype^.typename,defcoll^.paratype.def^.typename);
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end;
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{ Process open parameters }
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if push_high_param(defcoll^.paratype.def) then
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begin
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{ insert type conv but hold the ranges of the array }
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oldtype:=p^.left^.resulttype;
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p^.left:=gentypeconvnode(p^.left,defcoll^.paratype.def);
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firstpass(p^.left);
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p^.left^.resulttype:=oldtype;
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end
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else
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begin
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p^.left:=gentypeconvnode(p^.left,defcoll^.paratype.def);
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firstpass(p^.left);
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end;
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if codegenerror then
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begin
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dec(parsing_para_level);
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exit;
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end;
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end;
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{ check var strings }
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if (cs_strict_var_strings in aktlocalswitches) and
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is_shortstring(p^.left^.resulttype) and
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is_shortstring(defcoll^.paratype.def) and
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(defcoll^.paratyp=vs_var) and
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not(is_open_string(defcoll^.paratype.def)) and
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not(is_equal(p^.left^.resulttype,defcoll^.paratype.def)) then
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begin
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aktfilepos:=p^.left^.fileinfo;
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CGMessage(type_e_strict_var_string_violation);
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end;
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{ Variablen for call by reference may not be copied }
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{ into a register }
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{ is this usefull here ? }
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{ this was missing in formal parameter list }
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if (defcoll^.paratype.def=pdef(cformaldef)) then
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begin
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if defcoll^.paratyp=vs_var then
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begin
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if not valid_for_formal_var(p^.left) then
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begin
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aktfilepos:=p^.left^.fileinfo;
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CGMessage(parser_e_illegal_parameter_list);
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end;
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end;
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if defcoll^.paratyp=vs_const then
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begin
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if not valid_for_formal_const(p^.left) then
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begin
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aktfilepos:=p^.left^.fileinfo;
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CGMessage(parser_e_illegal_parameter_list);
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end;
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end;
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end;
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if defcoll^.paratyp=vs_var then
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begin
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set_unique(p^.left);
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make_not_regable(p^.left);
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end;
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if do_count then
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set_varstate(p^.left,defcoll^.paratyp<>vs_var);
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{ must only be done after typeconv PM }
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p^.resulttype:=defcoll^.paratype.def;
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end;
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if p^.left^.registers32>p^.registers32 then
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p^.registers32:=p^.left^.registers32;
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if p^.left^.registersfpu>p^.registersfpu then
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p^.registersfpu:=p^.left^.registersfpu;
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{$ifdef SUPPORT_MMX}
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if p^.left^.registersmmx>p^.registersmmx then
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p^.registersmmx:=p^.left^.registersmmx;
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{$endif SUPPORT_MMX}
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dec(parsing_para_level);
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{$ifdef extdebug}
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if do_count then
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count_ref:=store_count_ref;
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{$endif def extdebug}
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end;
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{*****************************************************************************
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FirstCallN
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*****************************************************************************}
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procedure firstcalln(var p : ptree);
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type
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pprocdefcoll = ^tprocdefcoll;
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tprocdefcoll = record
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data : pprocdef;
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nextpara : pparaitem;
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firstpara : pparaitem;
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next : pprocdefcoll;
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end;
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var
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hp,procs,hp2 : pprocdefcoll;
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pd : pprocdef;
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oldcallprocsym : pprocsym;
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def_from,def_to,conv_to : pdef;
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hpt,pt,inlinecode : ptree;
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exactmatch,inlined : boolean;
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paralength,lastpara : longint;
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lastparatype : pdef;
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pdc : pparaitem;
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{$ifdef TEST_PROCSYMS}
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nextprocsym : pprocsym;
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symt : psymtable;
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{$endif TEST_PROCSYMS}
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{ only Dummy }
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hcvt : tconverttype;
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regi : tregister;
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method_must_be_valid : boolean;
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label
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errorexit;
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{ check if the resulttype from tree p is equal with def, needed
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for stringconstn and formaldef }
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function is_equal(p:ptree;def:pdef) : boolean;
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begin
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{ safety check }
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if not (assigned(def) or assigned(p^.resulttype)) then
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begin
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is_equal:=false;
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exit;
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end;
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{ all types can be passed to a formaldef }
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is_equal:=(def^.deftype=formaldef) or
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(types.is_equal(p^.resulttype,def))
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{ to support ansi/long/wide strings in a proper way }
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{ string and string[10] are assumed as equal }
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{ when searching the correct overloaded procedure }
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or
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(
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(def^.deftype=stringdef) and (p^.resulttype^.deftype=stringdef) and
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(pstringdef(def)^.string_typ=pstringdef(p^.resulttype)^.string_typ)
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)
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or
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(
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(p^.left^.treetype=stringconstn) and
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(is_ansistring(p^.resulttype) and is_pchar(def))
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)
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or
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(
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(p^.left^.treetype=ordconstn) and
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(is_char(p^.resulttype) and (is_shortstring(def) or is_ansistring(def)))
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)
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{ set can also be a not yet converted array constructor }
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or
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(
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(def^.deftype=setdef) and (p^.resulttype^.deftype=arraydef) and
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(parraydef(p^.resulttype)^.IsConstructor) and not(parraydef(p^.resulttype)^.IsVariant)
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)
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{ in tp7 mode proc -> procvar is allowed }
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or
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(
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(m_tp_procvar in aktmodeswitches) and
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(def^.deftype=procvardef) and (p^.left^.treetype=calln) and
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(proc_to_procvar_equal(pprocdef(p^.left^.procdefinition),pprocvardef(def)))
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)
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;
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end;
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function is_in_limit(def_from,def_to : pdef) : boolean;
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|
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begin
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is_in_limit:=(def_from^.deftype = orddef) and
|
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(def_to^.deftype = orddef) and
|
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(porddef(def_from)^.low>porddef(def_to)^.low) and
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(porddef(def_from)^.high<porddef(def_to)^.high);
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end;
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|
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var
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is_const : boolean;
|
|
begin
|
|
{ release registers! }
|
|
{ if procdefinition<>nil then we called firstpass already }
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|
{ it seems to be bad because of the registers }
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|
{ at least we can avoid the overloaded search !! }
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procs:=nil;
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{ made this global for disposing !! }
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oldcallprocsym:=aktcallprocsym;
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aktcallprocsym:=nil;
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inlined:=false;
|
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if assigned(p^.procdefinition) and
|
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(pocall_inline in p^.procdefinition^.proccalloptions) then
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begin
|
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inlinecode:=p^.right;
|
|
if assigned(inlinecode) then
|
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begin
|
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inlined:=true;
|
|
{$ifdef INCLUDEOK}
|
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exclude(p^.procdefinition^.proccalloptions,pocall_inline);
|
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{$else}
|
|
p^.procdefinition^.proccalloptions:=p^.procdefinition^.proccalloptions-[pocall_inline];
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{$endif}
|
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end;
|
|
p^.right:=nil;
|
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end;
|
|
if assigned(p^.procdefinition) and
|
|
(po_containsself in p^.procdefinition^.procoptions) then
|
|
message(cg_e_cannot_call_message_direct);
|
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|
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{ procedure variable ? }
|
|
if assigned(p^.right) then
|
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begin
|
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{ procedure does a call }
|
|
procinfo^.flags:=procinfo^.flags or pi_do_call;
|
|
{$ifndef newcg}
|
|
{ calc the correture value for the register }
|
|
{$ifdef i386}
|
|
incrementregisterpushed($ff);
|
|
{$endif}
|
|
{$ifdef m68k}
|
|
for regi:=R_D0 to R_A6 do
|
|
inc(reg_pushes[regi],t_times*2);
|
|
{$endif}
|
|
{$endif newcg}
|
|
{ calculate the type of the parameters }
|
|
if assigned(p^.left) then
|
|
begin
|
|
firstcallparan(p^.left,nil,false);
|
|
if codegenerror then
|
|
goto errorexit;
|
|
end;
|
|
firstpass(p^.right);
|
|
set_varstate(p^.right,true);
|
|
|
|
{ check the parameters }
|
|
pdc:=pparaitem(pprocvardef(p^.right^.resulttype)^.para^.first);
|
|
pt:=p^.left;
|
|
while assigned(pdc) and assigned(pt) do
|
|
begin
|
|
pt:=pt^.right;
|
|
pdc:=pparaitem(pdc^.next);
|
|
end;
|
|
if assigned(pt) or assigned(pdc) then
|
|
begin
|
|
if assigned(pt) then
|
|
aktfilepos:=pt^.fileinfo;
|
|
CGMessage(parser_e_illegal_parameter_list);
|
|
end;
|
|
{ insert type conversions }
|
|
if assigned(p^.left) then
|
|
begin
|
|
firstcallparan(p^.left,pparaitem(pprocvardef(p^.right^.resulttype)^.para^.first),true);
|
|
if codegenerror then
|
|
goto errorexit;
|
|
end;
|
|
p^.resulttype:=pprocvardef(p^.right^.resulttype)^.rettype.def;
|
|
|
|
{ this was missing, leads to a bug below if
|
|
the procvar is a function }
|
|
p^.procdefinition:=pabstractprocdef(p^.right^.resulttype);
|
|
end
|
|
else
|
|
{ not a procedure variable }
|
|
begin
|
|
{ determine the type of the parameters }
|
|
if assigned(p^.left) then
|
|
begin
|
|
firstcallparan(p^.left,nil,false);
|
|
if codegenerror then
|
|
goto errorexit;
|
|
end;
|
|
|
|
aktcallprocsym:=pprocsym(p^.symtableprocentry);
|
|
{ do we know the procedure to call ? }
|
|
if not(assigned(p^.procdefinition)) then
|
|
begin
|
|
{$ifdef TEST_PROCSYMS}
|
|
if (p^.unit_specific) or
|
|
assigned(p^.methodpointer) then
|
|
nextprocsym:=nil
|
|
else while not assigned(procs) do
|
|
begin
|
|
symt:=p^.symtableproc;
|
|
srsym:=nil;
|
|
while assigned(symt^.next) and not assigned(srsym) do
|
|
begin
|
|
symt:=symt^.next;
|
|
getsymonlyin(symt,actprocsym^.name);
|
|
if assigned(srsym) then
|
|
if srsym^.typ<>procsym then
|
|
begin
|
|
{ reject all that is not a procedure }
|
|
srsym:=nil;
|
|
{ don't search elsewhere }
|
|
while assigned(symt^.next) do
|
|
symt:=symt^.next;
|
|
end;
|
|
end;
|
|
nextprocsym:=srsym;
|
|
end;
|
|
{$endif TEST_PROCSYMS}
|
|
{ determine length of parameter list }
|
|
pt:=p^.left;
|
|
paralength:=0;
|
|
while assigned(pt) do
|
|
begin
|
|
inc(paralength);
|
|
pt:=pt^.right;
|
|
end;
|
|
|
|
{ link all procedures which have the same # of parameters }
|
|
pd:=aktcallprocsym^.definition;
|
|
while assigned(pd) do
|
|
begin
|
|
{ only when the # of parameter are equal }
|
|
if (pd^.para^.count=paralength) then
|
|
begin
|
|
new(hp);
|
|
hp^.data:=pd;
|
|
hp^.next:=procs;
|
|
hp^.nextpara:=pparaitem(pd^.para^.first);
|
|
hp^.firstpara:=pparaitem(pd^.para^.first);
|
|
procs:=hp;
|
|
end;
|
|
pd:=pd^.nextoverloaded;
|
|
end;
|
|
|
|
{ no procedures found? then there is something wrong
|
|
with the parameter size }
|
|
if not assigned(procs) then
|
|
begin
|
|
{ in tp mode we can try to convert to procvar if
|
|
there are no parameters specified }
|
|
if not(assigned(p^.left)) and
|
|
(m_tp_procvar in aktmodeswitches) then
|
|
begin
|
|
if (p^.symtableprocentry^.owner^.symtabletype=objectsymtable) and
|
|
(pobjectdef(p^.symtableprocentry^.owner^.defowner)^.is_class) then
|
|
hpt:=genloadmethodcallnode(pprocsym(p^.symtableprocentry),p^.symtableproc,
|
|
getcopy(p^.methodpointer))
|
|
else
|
|
hpt:=genloadcallnode(pprocsym(p^.symtableprocentry),p^.symtableproc);
|
|
disposetree(p);
|
|
firstpass(hpt);
|
|
p:=hpt;
|
|
end
|
|
else
|
|
begin
|
|
if assigned(p^.left) then
|
|
aktfilepos:=p^.left^.fileinfo;
|
|
CGMessage(parser_e_wrong_parameter_size);
|
|
aktcallprocsym^.write_parameter_lists;
|
|
end;
|
|
goto errorexit;
|
|
end;
|
|
|
|
{ now we can compare parameter after parameter }
|
|
pt:=p^.left;
|
|
{ we start with the last parameter }
|
|
lastpara:=paralength+1;
|
|
lastparatype:=nil;
|
|
while assigned(pt) do
|
|
begin
|
|
dec(lastpara);
|
|
{ walk all procedures and determine how this parameter matches and set:
|
|
1. pt^.exact_match_found if one parameter has an exact match
|
|
2. exactmatch if an equal or exact match is found
|
|
|
|
3. para^.argconvtyp to exact,equal or convertable
|
|
(when convertable then also convertlevel is set)
|
|
4. pt^.convlevel1found if there is a convertlevel=1
|
|
5. pt^.convlevel2found if there is a convertlevel=2
|
|
}
|
|
exactmatch:=false;
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
if is_equal(pt,hp^.nextpara^.paratype.def) then
|
|
begin
|
|
if hp^.nextpara^.paratype.def=pt^.resulttype then
|
|
begin
|
|
pt^.exact_match_found:=true;
|
|
hp^.nextpara^.argconvtyp:=act_exact;
|
|
end
|
|
else
|
|
hp^.nextpara^.argconvtyp:=act_equal;
|
|
exactmatch:=true;
|
|
end
|
|
else
|
|
begin
|
|
hp^.nextpara^.argconvtyp:=act_convertable;
|
|
hp^.nextpara^.convertlevel:=isconvertable(pt^.resulttype,hp^.nextpara^.paratype.def,
|
|
hcvt,pt^.left^.treetype,false);
|
|
case hp^.nextpara^.convertlevel of
|
|
1 : pt^.convlevel1found:=true;
|
|
2 : pt^.convlevel2found:=true;
|
|
end;
|
|
end;
|
|
|
|
hp:=hp^.next;
|
|
end;
|
|
|
|
{ If there was an exactmatch then delete all convertables }
|
|
if exactmatch then
|
|
begin
|
|
hp:=procs;
|
|
procs:=nil;
|
|
while assigned(hp) do
|
|
begin
|
|
hp2:=hp^.next;
|
|
{ keep if not convertable }
|
|
if (hp^.nextpara^.argconvtyp<>act_convertable) then
|
|
begin
|
|
hp^.next:=procs;
|
|
procs:=hp;
|
|
end
|
|
else
|
|
dispose(hp);
|
|
hp:=hp2;
|
|
end;
|
|
end
|
|
else
|
|
{ No exact match was found, remove all procedures that are
|
|
not convertable (convertlevel=0) }
|
|
begin
|
|
hp:=procs;
|
|
procs:=nil;
|
|
while assigned(hp) do
|
|
begin
|
|
hp2:=hp^.next;
|
|
{ keep if not convertable }
|
|
if (hp^.nextpara^.convertlevel<>0) then
|
|
begin
|
|
hp^.next:=procs;
|
|
procs:=hp;
|
|
end
|
|
else
|
|
begin
|
|
{ save the type for nice error message }
|
|
lastparatype:=hp^.nextpara^.paratype.def;
|
|
dispose(hp);
|
|
end;
|
|
hp:=hp2;
|
|
end;
|
|
end;
|
|
{ update nextpara for all procedures }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=pparaitem(hp^.nextpara^.next);
|
|
hp:=hp^.next;
|
|
end;
|
|
{ load next parameter or quit loop if no procs left }
|
|
if assigned(procs) then
|
|
pt:=pt^.right
|
|
else
|
|
break;
|
|
end;
|
|
|
|
{ All parameters are checked, check if there are any
|
|
procedures left }
|
|
if not assigned(procs) then
|
|
begin
|
|
{ there is an error, must be wrong type, because
|
|
wrong size is already checked (PFV) }
|
|
if (not assigned(lastparatype)) or
|
|
(not assigned(pt)) or
|
|
(not assigned(pt^.resulttype)) then
|
|
internalerror(39393)
|
|
else
|
|
begin
|
|
aktfilepos:=pt^.fileinfo;
|
|
CGMessage3(type_e_wrong_parameter_type,tostr(lastpara),
|
|
pt^.resulttype^.typename,lastparatype^.typename);
|
|
end;
|
|
aktcallprocsym^.write_parameter_lists;
|
|
goto errorexit;
|
|
end;
|
|
|
|
{ if there are several choices left then for orddef }
|
|
{ if a type is totally included in the other }
|
|
{ we don't fear an overflow , }
|
|
{ so we can do as if it is an exact match }
|
|
{ this will convert integer to longint }
|
|
{ rather than to words }
|
|
{ conversion of byte to integer or longint }
|
|
{would still not be solved }
|
|
if assigned(procs) and assigned(procs^.next) then
|
|
begin
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=hp^.firstpara;
|
|
hp:=hp^.next;
|
|
end;
|
|
pt:=p^.left;
|
|
while assigned(pt) do
|
|
begin
|
|
{ matches a parameter of one procedure exact ? }
|
|
exactmatch:=false;
|
|
def_from:=pt^.resulttype;
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
if not is_equal(pt,hp^.nextpara^.paratype.def) then
|
|
begin
|
|
def_to:=hp^.nextpara^.paratype.def;
|
|
if ((def_from^.deftype=orddef) and (def_to^.deftype=orddef)) and
|
|
(is_in_limit(def_from,def_to) or
|
|
((hp^.nextpara^.paratyp=vs_var) and
|
|
(def_from^.size=def_to^.size))) then
|
|
begin
|
|
exactmatch:=true;
|
|
conv_to:=def_to;
|
|
end;
|
|
end;
|
|
hp:=hp^.next;
|
|
end;
|
|
|
|
{ .... if yes, del all the other procedures }
|
|
if exactmatch then
|
|
begin
|
|
{ the first .... }
|
|
while (assigned(procs)) and not(is_in_limit(def_from,procs^.nextpara^.paratype.def)) do
|
|
begin
|
|
hp:=procs^.next;
|
|
dispose(procs);
|
|
procs:=hp;
|
|
end;
|
|
{ and the others }
|
|
hp:=procs;
|
|
while (assigned(hp)) and assigned(hp^.next) do
|
|
begin
|
|
if not(is_in_limit(def_from,hp^.next^.nextpara^.paratype.def)) then
|
|
begin
|
|
hp2:=hp^.next^.next;
|
|
dispose(hp^.next);
|
|
hp^.next:=hp2;
|
|
end
|
|
else
|
|
begin
|
|
def_to:=hp^.next^.nextpara^.paratype.def;
|
|
if (conv_to^.size>def_to^.size) or
|
|
((porddef(conv_to)^.low<porddef(def_to)^.low) and
|
|
(porddef(conv_to)^.high>porddef(def_to)^.high)) then
|
|
begin
|
|
hp2:=procs;
|
|
procs:=hp;
|
|
conv_to:=def_to;
|
|
dispose(hp2);
|
|
end
|
|
else
|
|
hp:=hp^.next;
|
|
end;
|
|
end;
|
|
end;
|
|
{ update nextpara for all procedures }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=pparaitem(hp^.nextpara^.next);
|
|
hp:=hp^.next;
|
|
end;
|
|
pt:=pt^.right;
|
|
end;
|
|
end;
|
|
|
|
{ let's try to eliminate equal if there is an exact match
|
|
is there }
|
|
if assigned(procs) and assigned(procs^.next) then
|
|
begin
|
|
{ reset nextpara for all procs left }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=hp^.firstpara;
|
|
hp:=hp^.next;
|
|
end;
|
|
|
|
pt:=p^.left;
|
|
while assigned(pt) do
|
|
begin
|
|
if pt^.exact_match_found then
|
|
begin
|
|
hp:=procs;
|
|
procs:=nil;
|
|
while assigned(hp) do
|
|
begin
|
|
hp2:=hp^.next;
|
|
{ keep the exact matches, dispose the others }
|
|
if (hp^.nextpara^.argconvtyp=act_exact) then
|
|
begin
|
|
hp^.next:=procs;
|
|
procs:=hp;
|
|
end
|
|
else
|
|
dispose(hp);
|
|
hp:=hp2;
|
|
end;
|
|
end;
|
|
{ update nextpara for all procedures }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=pparaitem(hp^.nextpara^.next);
|
|
hp:=hp^.next;
|
|
end;
|
|
pt:=pt^.right;
|
|
end;
|
|
end;
|
|
|
|
{ Check if there are convertlevel 1 and 2 differences
|
|
left for the parameters, then discard all convertlevel
|
|
2 procedures. The value of convlevelXfound can still
|
|
be used, because all convertables are still here or
|
|
not }
|
|
if assigned(procs) and assigned(procs^.next) then
|
|
begin
|
|
{ reset nextpara for all procs left }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=hp^.firstpara;
|
|
hp:=hp^.next;
|
|
end;
|
|
|
|
pt:=p^.left;
|
|
while assigned(pt) do
|
|
begin
|
|
if pt^.convlevel1found and pt^.convlevel2found then
|
|
begin
|
|
hp:=procs;
|
|
procs:=nil;
|
|
while assigned(hp) do
|
|
begin
|
|
hp2:=hp^.next;
|
|
{ keep all not act_convertable and all convertlevels=1 }
|
|
if (hp^.nextpara^.argconvtyp<>act_convertable) or
|
|
(hp^.nextpara^.convertlevel=1) then
|
|
begin
|
|
hp^.next:=procs;
|
|
procs:=hp;
|
|
end
|
|
else
|
|
dispose(hp);
|
|
hp:=hp2;
|
|
end;
|
|
end;
|
|
{ update nextpara for all procedures }
|
|
hp:=procs;
|
|
while assigned(hp) do
|
|
begin
|
|
hp^.nextpara:=pparaitem(hp^.nextpara^.next);
|
|
hp:=hp^.next;
|
|
end;
|
|
pt:=pt^.right;
|
|
end;
|
|
end;
|
|
|
|
if not(assigned(procs)) or assigned(procs^.next) then
|
|
begin
|
|
CGMessage(cg_e_cant_choose_overload_function);
|
|
aktcallprocsym^.write_parameter_lists;
|
|
goto errorexit;
|
|
end;
|
|
{$ifdef TEST_PROCSYMS}
|
|
if (procs=nil) and assigned(nextprocsym) then
|
|
begin
|
|
p^.symtableprocentry:=nextprocsym;
|
|
p^.symtableproc:=symt;
|
|
end;
|
|
end ; { of while assigned(p^.symtableprocentry) do }
|
|
{$endif TEST_PROCSYMS}
|
|
if make_ref then
|
|
begin
|
|
procs^.data^.lastref:=new(pref,init(procs^.data^.lastref,@p^.fileinfo));
|
|
inc(procs^.data^.refcount);
|
|
if procs^.data^.defref=nil then
|
|
procs^.data^.defref:=procs^.data^.lastref;
|
|
end;
|
|
|
|
p^.procdefinition:=procs^.data;
|
|
p^.resulttype:=procs^.data^.rettype.def;
|
|
{ big error for with statements
|
|
p^.symtableproc:=p^.procdefinition^.owner;
|
|
but neede for overloaded operators !! }
|
|
if p^.symtableproc=nil then
|
|
p^.symtableproc:=p^.procdefinition^.owner;
|
|
|
|
p^.location.loc:=LOC_MEM;
|
|
{$ifdef CHAINPROCSYMS}
|
|
{ object with method read;
|
|
call to read(x) will be a usual procedure call }
|
|
if assigned(p^.methodpointer) and
|
|
(p^.procdefinition^._class=nil) then
|
|
begin
|
|
{ not ok for extended }
|
|
case p^.methodpointer^.treetype of
|
|
typen,hnewn : fatalerror(no_para_match);
|
|
end;
|
|
disposetree(p^.methodpointer);
|
|
p^.methodpointer:=nil;
|
|
end;
|
|
{$endif CHAINPROCSYMS}
|
|
end; { end of procedure to call determination }
|
|
|
|
is_const:=(pocall_internconst in p^.procdefinition^.proccalloptions) and
|
|
((block_type=bt_const) or
|
|
(assigned(p^.left) and (p^.left^.left^.treetype in [realconstn,ordconstn])));
|
|
{ handle predefined procedures }
|
|
if (pocall_internproc in p^.procdefinition^.proccalloptions) or is_const then
|
|
begin
|
|
if assigned(p^.left) then
|
|
begin
|
|
{ settextbuf needs two args }
|
|
if assigned(p^.left^.right) then
|
|
pt:=geninlinenode(pprocdef(p^.procdefinition)^.extnumber,is_const,p^.left)
|
|
else
|
|
begin
|
|
pt:=geninlinenode(pprocdef(p^.procdefinition)^.extnumber,is_const,p^.left^.left);
|
|
putnode(p^.left);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
pt:=geninlinenode(pprocdef(p^.procdefinition)^.extnumber,is_const,nil);
|
|
end;
|
|
putnode(p);
|
|
firstpass(pt);
|
|
p:=pt;
|
|
goto errorexit;
|
|
end
|
|
else
|
|
{ no intern procedure => we do a call }
|
|
{ calc the correture value for the register }
|
|
{ handle predefined procedures }
|
|
if (pocall_inline in p^.procdefinition^.proccalloptions) then
|
|
begin
|
|
if assigned(p^.methodpointer) then
|
|
CGMessage(cg_e_unable_inline_object_methods);
|
|
if assigned(p^.right) and (p^.right^.treetype<>procinlinen) then
|
|
CGMessage(cg_e_unable_inline_procvar);
|
|
{ p^.treetype:=procinlinen; }
|
|
if not assigned(p^.right) then
|
|
begin
|
|
if assigned(pprocdef(p^.procdefinition)^.code) then
|
|
inlinecode:=genprocinlinenode(p,ptree(pprocdef(p^.procdefinition)^.code))
|
|
else
|
|
CGMessage(cg_e_no_code_for_inline_stored);
|
|
if assigned(inlinecode) then
|
|
begin
|
|
{ consider it has not inlined if called
|
|
again inside the args }
|
|
{$ifdef INCLUDEOK}
|
|
exclude(p^.procdefinition^.proccalloptions,pocall_inline);
|
|
{$else}
|
|
p^.procdefinition^.proccalloptions:=p^.procdefinition^.proccalloptions-[pocall_inline];
|
|
{$endif}
|
|
firstpass(inlinecode);
|
|
inlined:=true;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
procinfo^.flags:=procinfo^.flags or pi_do_call;
|
|
|
|
if (po_interrupt in p^.procdefinition^.procoptions) then
|
|
CGmessage1(cg_e_no_call_to_interrupt,p^.symtableprocentry^.name);
|
|
{ work trough all parameters to insert the type conversions }
|
|
{ !!! done now after internproc !! (PM) }
|
|
if assigned(p^.left) then
|
|
begin
|
|
firstcallparan(p^.left,pparaitem(p^.procdefinition^.para^.first),true);
|
|
end;
|
|
{$ifndef newcg}
|
|
{$ifdef i386}
|
|
incrementregisterpushed(pprocdef(p^.procdefinition)^.usedregisters);
|
|
{$endif}
|
|
{$ifdef m68k}
|
|
for regi:=R_D0 to R_A6 do
|
|
begin
|
|
if (pprocdef(p^.procdefinition)^.usedregisters and ($800 shr word(regi)))<>0 then
|
|
inc(reg_pushes[regi],t_times*2);
|
|
end;
|
|
{$endif}
|
|
{$endif newcg}
|
|
end;
|
|
{ ensure that the result type is set }
|
|
p^.resulttype:=p^.procdefinition^.rettype.def;
|
|
{ get a register for the return value }
|
|
if (p^.resulttype<>pdef(voiddef)) then
|
|
begin
|
|
if (p^.procdefinition^.proctypeoption=potype_constructor) then
|
|
begin
|
|
{ extra handling of classes }
|
|
{ p^.methodpointer should be assigned! }
|
|
if assigned(p^.methodpointer) and assigned(p^.methodpointer^.resulttype) and
|
|
(p^.methodpointer^.resulttype^.deftype=classrefdef) then
|
|
begin
|
|
p^.location.loc:=LOC_REGISTER;
|
|
p^.registers32:=1;
|
|
{ the result type depends on the classref }
|
|
p^.resulttype:=pclassrefdef(p^.methodpointer^.resulttype)^.pointertype.def;
|
|
end
|
|
{ a object constructor returns the result with the flags }
|
|
else
|
|
p^.location.loc:=LOC_FLAGS;
|
|
end
|
|
else
|
|
begin
|
|
{$ifdef SUPPORT_MMX}
|
|
if (cs_mmx in aktlocalswitches) and
|
|
is_mmx_able_array(p^.resulttype) then
|
|
begin
|
|
p^.location.loc:=LOC_MMXREGISTER;
|
|
p^.registersmmx:=1;
|
|
end
|
|
else
|
|
{$endif SUPPORT_MMX}
|
|
if ret_in_acc(p^.resulttype) then
|
|
begin
|
|
p^.location.loc:=LOC_REGISTER;
|
|
if is_64bitint(p^.resulttype) then
|
|
p^.registers32:=2
|
|
else
|
|
p^.registers32:=1;
|
|
|
|
{ wide- and ansistrings are returned in EAX }
|
|
{ but they are imm. moved to a memory location }
|
|
if is_widestring(p^.resulttype) or
|
|
is_ansistring(p^.resulttype) then
|
|
begin
|
|
p^.location.loc:=LOC_MEM;
|
|
{ this is wrong we still need one register PM
|
|
p^.registers32:=0; }
|
|
{ we use ansistrings so no fast exit here }
|
|
procinfo^.no_fast_exit:=true;
|
|
p^.registers32:=1;
|
|
end;
|
|
end
|
|
else if (p^.resulttype^.deftype=floatdef) then
|
|
begin
|
|
p^.location.loc:=LOC_FPU;
|
|
p^.registersfpu:=1;
|
|
end
|
|
else
|
|
p^.location.loc:=LOC_MEM;
|
|
end;
|
|
end;
|
|
{ a fpu can be used in any procedure !! }
|
|
p^.registersfpu:=p^.procdefinition^.fpu_used;
|
|
{ if this is a call to a method calc the registers }
|
|
if (p^.methodpointer<>nil) then
|
|
begin
|
|
case p^.methodpointer^.treetype of
|
|
{ but only, if this is not a supporting node }
|
|
typen: ;
|
|
{ we need one register for new return value PM }
|
|
hnewn : if p^.registers32=0 then
|
|
p^.registers32:=1;
|
|
else
|
|
begin
|
|
if (p^.procdefinition^.proctypeoption in [potype_constructor,potype_destructor]) and
|
|
assigned(p^.symtable) and (p^.symtable^.symtabletype=withsymtable) and
|
|
not pwithsymtable(p^.symtable)^.direct_with then
|
|
begin
|
|
CGmessage(cg_e_cannot_call_cons_dest_inside_with);
|
|
end; { Is accepted by Delphi !! }
|
|
{ this is not a good reason to accept it in FPC if we produce
|
|
wrong code for it !!! (PM) }
|
|
|
|
{ R.Assign is not a constructor !!! }
|
|
{ but for R^.Assign, R must be valid !! }
|
|
if (p^.procdefinition^.proctypeoption=potype_constructor) or
|
|
((p^.methodpointer^.treetype=loadn) and
|
|
(not(oo_has_virtual in pobjectdef(p^.methodpointer^.resulttype)^.objectoptions))) then
|
|
method_must_be_valid:=false
|
|
else
|
|
method_must_be_valid:=true;
|
|
firstpass(p^.methodpointer);
|
|
set_varstate(p^.methodpointer,method_must_be_valid);
|
|
{ The object is already used ven if it is called once }
|
|
if (p^.methodpointer^.treetype=loadn) and
|
|
(p^.methodpointer^.symtableentry^.typ=varsym) then
|
|
pvarsym(p^.methodpointer^.symtableentry)^.varstate:=vs_used;
|
|
|
|
p^.registersfpu:=max(p^.methodpointer^.registersfpu,p^.registersfpu);
|
|
p^.registers32:=max(p^.methodpointer^.registers32,p^.registers32);
|
|
{$ifdef SUPPORT_MMX}
|
|
p^.registersmmx:=max(p^.methodpointer^.registersmmx,p^.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
if inlined then
|
|
p^.right:=inlinecode;
|
|
{ determine the registers of the procedure variable }
|
|
{ is this OK for inlined procs also ?? (PM) }
|
|
if assigned(p^.right) then
|
|
begin
|
|
p^.registersfpu:=max(p^.right^.registersfpu,p^.registersfpu);
|
|
p^.registers32:=max(p^.right^.registers32,p^.registers32);
|
|
{$ifdef SUPPORT_MMX}
|
|
p^.registersmmx:=max(p^.right^.registersmmx,p^.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
{ determine the registers of the procedure }
|
|
if assigned(p^.left) then
|
|
begin
|
|
p^.registersfpu:=max(p^.left^.registersfpu,p^.registersfpu);
|
|
p^.registers32:=max(p^.left^.registers32,p^.registers32);
|
|
{$ifdef SUPPORT_MMX}
|
|
p^.registersmmx:=max(p^.left^.registersmmx,p^.registersmmx);
|
|
{$endif SUPPORT_MMX}
|
|
end;
|
|
errorexit:
|
|
{ Reset some settings back }
|
|
if assigned(procs) then
|
|
dispose(procs);
|
|
if inlined then
|
|
{$ifdef INCLUDEOK}
|
|
include(p^.procdefinition^.proccalloptions,pocall_inline);
|
|
{$else}
|
|
p^.procdefinition^.proccalloptions:=p^.procdefinition^.proccalloptions+[pocall_inline];
|
|
{$endif}
|
|
aktcallprocsym:=oldcallprocsym;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
FirstProcInlineN
|
|
*****************************************************************************}
|
|
|
|
procedure firstprocinline(var p : ptree);
|
|
begin
|
|
{ left contains the code in tree form }
|
|
{ but it has already been firstpassed }
|
|
{ so firstpass(p^.left); does not seem required }
|
|
{ might be required later if we change the arg handling !! }
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.83 2000-04-02 18:30:12 florian
|
|
* fixed another problem with readln(<floating point register variable>);
|
|
* the register allocator takes now care of necessary pushes/pops for
|
|
readln/writeln
|
|
|
|
Revision 1.82 2000/02/29 22:13:41 pierre
|
|
+ use $GOTO ON
|
|
|
|
Revision 1.81 2000/02/24 18:41:39 peter
|
|
* removed warnings/notes
|
|
|
|
Revision 1.80 2000/02/17 14:53:43 florian
|
|
* some updates for the newcg
|
|
|
|
Revision 1.79 2000/02/09 13:23:07 peter
|
|
* log truncated
|
|
|
|
Revision 1.78 2000/01/07 09:35:12 pierre
|
|
* set_varstate must be called after typeconv insertions
|
|
|
|
Revision 1.77 2000/01/07 01:14:44 peter
|
|
* updated copyright to 2000
|
|
|
|
Revision 1.76 1999/12/19 15:13:56 peter
|
|
* constant array type conversion fixed
|
|
|
|
Revision 1.75 1999/12/09 23:18:04 pierre
|
|
* no_fast_exit if procedure contains implicit termination code
|
|
|
|
Revision 1.74 1999/11/30 10:40:57 peter
|
|
+ ttype, tsymlist
|
|
|
|
Revision 1.73 1999/11/18 15:34:49 pierre
|
|
* Notes/Hints for local syms changed to
|
|
Set_varstate function
|
|
|
|
Revision 1.72 1999/11/17 17:05:07 pierre
|
|
* Notes/hints changes
|
|
|
|
Revision 1.71 1999/11/06 14:34:29 peter
|
|
* truncated log to 20 revs
|
|
|
|
Revision 1.70 1999/10/26 12:30:46 peter
|
|
* const parameter is now checked
|
|
* better and generic check if a node can be used for assigning
|
|
* export fixes
|
|
* procvar equal works now (it never had worked at least from 0.99.8)
|
|
* defcoll changed to linkedlist with pparaitem so it can easily be
|
|
walked both directions
|
|
|
|
Revision 1.69 1999/10/22 14:37:30 peter
|
|
* error when properties are passed to var parameters
|
|
|
|
Revision 1.68 1999/10/13 10:35:27 peter
|
|
* var must match exactly error msg extended with got and expected type
|
|
* array constructor type check now gives error on wrong types
|
|
|
|
Revision 1.67 1999/10/12 15:50:54 pierre
|
|
* error if calling interrupt procedure
|
|
|
|
Revision 1.66 1999/09/27 23:45:00 peter
|
|
* procinfo is now a pointer
|
|
* support for result setting in sub procedure
|
|
|
|
Revision 1.65 1999/09/16 23:05:56 florian
|
|
* m68k compiler is again compilable (only gas writer, no assembler reader)
|
|
|
|
Revision 1.64 1999/09/14 07:59:48 florian
|
|
* finally!? fixed
|
|
with <function with result in temp> do
|
|
My last and also Peter's fix before were wrong :(
|
|
|
|
Revision 1.63 1999/09/10 18:48:11 florian
|
|
* some bug fixes (e.g. must_be_valid and procinfo^.funcret_is_valid)
|
|
* most things for stored properties fixed
|
|
|
|
Revision 1.62 1999/08/23 23:42:52 pierre
|
|
* hnewn reg allocation corrected
|
|
|
|
Revision 1.61 1999/08/17 13:26:08 peter
|
|
* arrayconstructor -> arrayofconst fixed when arraycosntructor was not
|
|
variant.
|
|
|
|
Revision 1.60 1999/08/16 23:23:39 peter
|
|
* arrayconstructor -> openarray type conversions for element types
|
|
|
|
Revision 1.59 1999/08/13 21:33:16 peter
|
|
* support for array constructors extended and more error checking
|
|
|
|
} |