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683 lines
25 KiB
ObjectPascal
683 lines
25 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1993-98 by Florian Klaempfl
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Type checking and register allocation for load/assignment nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit tcld;
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interface
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uses
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tree;
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procedure firstload(var p : ptree);
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procedure firstassignment(var p : ptree);
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procedure firstfuncret(var p : ptree);
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procedure firstarrayconstructrange(var p:ptree);
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procedure firstarrayconstruct(var p : ptree);
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procedure firsttype(var p : ptree);
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implementation
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uses
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cobjects,verbose,globtype,globals,systems,
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symconst,symtable,aasm,types,
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hcodegen,htypechk,pass_1,
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tccnv,cpubase
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{$ifdef i386}
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,tgeni386
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{$endif}
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;
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{*****************************************************************************
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FirstLoad
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*****************************************************************************}
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procedure firstload(var p : ptree);
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var
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p1 : ptree;
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begin
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if (p^.symtable^.symtabletype=withsymtable) and
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(pwithsymtable(p^.symtable)^.direct_with) and
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(p^.symtableentry^.typ=varsym) then
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begin
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p1:=getcopy(ptree(pwithsymtable(p^.symtable)^.withrefnode));
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p1:=gensubscriptnode(pvarsym(p^.symtableentry),p1);
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putnode(p);
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p:=p1;
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firstpass(p);
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exit;
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end;
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p^.location.loc:=LOC_REFERENCE;
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p^.registers32:=0;
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p^.registersfpu:=0;
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{$ifdef SUPPORT_MMX}
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p^.registersmmx:=0;
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{$endif SUPPORT_MMX}
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if p^.symtableentry^.typ=funcretsym then
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begin
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p1:=genzeronode(funcretn);
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p1^.funcretprocinfo:=pprocinfo(pfuncretsym(p^.symtableentry)^.funcretprocinfo);
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p1^.retdef:=pfuncretsym(p^.symtableentry)^.funcretdef;
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firstpass(p1);
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putnode(p);
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p:=p1;
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exit;
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end;
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if p^.symtableentry^.typ=absolutesym then
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begin
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p^.resulttype:=pabsolutesym(p^.symtableentry)^.definition;
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if pabsolutesym(p^.symtableentry)^.abstyp=tovar then
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p^.symtableentry:=pabsolutesym(p^.symtableentry)^.ref;
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p^.symtable:=p^.symtableentry^.owner;
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p^.is_absolute:=true;
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end;
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case p^.symtableentry^.typ of
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absolutesym :;
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constsym:
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begin
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if pconstsym(p^.symtableentry)^.consttype=constresourcestring then
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begin
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p^.resulttype:=cansistringdef;
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p^.location.loc:=LOC_MEM;
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end
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else
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internalerror(22799);
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end;
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varsym :
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begin
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if not(p^.is_absolute) and (p^.resulttype=nil) then
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p^.resulttype:=pvarsym(p^.symtableentry)^.definition;
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if (p^.symtable^.symtabletype in [parasymtable,localsymtable]) and
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(lexlevel>p^.symtable^.symtablelevel) then
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begin
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{ if the variable is in an other stackframe then we need
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a register to dereference }
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if (p^.symtable^.symtablelevel)>0 then
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begin
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p^.registers32:=1;
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{ further, the variable can't be put into a register }
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{$ifdef INCLUDEOK}
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exclude(pvarsym(p^.symtableentry)^.varoptions,vo_regable);
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{$else}
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pvarsym(p^.symtableentry)^.varoptions:=pvarsym(p^.symtableentry)^.varoptions-[vo_regable];
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{$endif}
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end;
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end;
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if (pvarsym(p^.symtableentry)^.varspez=vs_const) then
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p^.location.loc:=LOC_MEM;
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{ we need a register for call by reference parameters }
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if (pvarsym(p^.symtableentry)^.varspez=vs_var) or
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((pvarsym(p^.symtableentry)^.varspez=vs_const) and
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push_addr_param(pvarsym(p^.symtableentry)^.definition)) or
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{ call by value open arrays are also indirect addressed }
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is_open_array(pvarsym(p^.symtableentry)^.definition) then
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p^.registers32:=1;
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if p^.symtable^.symtabletype=withsymtable then
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inc(p^.registers32);
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if ([vo_is_thread_var,vo_is_dll_var]*pvarsym(p^.symtableentry)^.varoptions)<>[] then
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p^.registers32:=1;
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{ a class variable is a pointer !!!
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yes, but we have to resolve the reference in an
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appropriate tree node (FK)
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if (pvarsym(p^.symtableentry)^.definition^.deftype=objectdef) and
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((pobjectdef(pvarsym(p^.symtableentry)^.definition)^.options and oo_is_class)<>0) then
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p^.registers32:=1;
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}
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{ count variable references }
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if must_be_valid and p^.is_first then
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begin
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if pvarsym(p^.symtableentry)^.varstate=vs_declared2 then
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if (assigned(pvarsym(p^.symtableentry)^.owner) and
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assigned(aktprocsym) and
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(pvarsym(p^.symtableentry)^.owner = aktprocsym^.definition^.localst)) then
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begin
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if p^.symtable^.symtabletype=localsymtable then
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CGMessage1(sym_n_uninitialized_local_variable,pvarsym(p^.symtableentry)^.name)
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else
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CGMessage1(sym_n_uninitialized_variable,pvarsym(p^.symtableentry)^.name);
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end;
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end;
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if count_ref then
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begin
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if (p^.is_first) then
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begin
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if pvarsym(p^.symtableentry)^.varstate=vs_declared2 then
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pvarsym(p^.symtableentry)^.varstate:=vs_used;
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p^.is_first:=false;
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end;
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end;
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{ this will create problem with local var set by
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under_procedures
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if (assigned(pvarsym(p^.symtableentry)^.owner) and assigned(aktprocsym)
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and ((pvarsym(p^.symtableentry)^.owner = aktprocsym^.definition^.localst)
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or (pvarsym(p^.symtableentry)^.owner = aktprocsym^.definition^.localst))) then }
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if t_times<1 then
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inc(pvarsym(p^.symtableentry)^.refs)
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else
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inc(pvarsym(p^.symtableentry)^.refs,t_times);
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end;
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typedconstsym :
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if not p^.is_absolute then
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p^.resulttype:=ptypedconstsym(p^.symtableentry)^.definition;
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procsym :
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begin
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if assigned(pprocsym(p^.symtableentry)^.definition^.nextoverloaded) then
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CGMessage(parser_e_no_overloaded_procvars);
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p^.resulttype:=pprocsym(p^.symtableentry)^.definition;
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{ if the owner of the procsym is a object, }
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{ left must be set, if left isn't set }
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{ it can be only self }
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{ this code is only used in TP procvar mode }
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if (m_tp_procvar in aktmodeswitches) and
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not(assigned(p^.left)) and
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(pprocsym(p^.symtableentry)^.owner^.symtabletype=objectsymtable) then
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p^.left:=genselfnode(procinfo._class);
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{ method pointer ? }
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if assigned(p^.left) then
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begin
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firstpass(p^.left);
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p^.registers32:=max(p^.registers32,p^.left^.registers32);
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p^.registersfpu:=max(p^.registersfpu,p^.left^.registersfpu);
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{$ifdef SUPPORT_MMX}
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p^.registersmmx:=max(p^.registersmmx,p^.left^.registersmmx);
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{$endif SUPPORT_MMX}
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end;
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end;
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else internalerror(3);
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end;
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end;
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{*****************************************************************************
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FirstAssignment
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*****************************************************************************}
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procedure firstassignment(var p : ptree);
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var
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store_valid : boolean;
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hp : ptree;
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begin
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store_valid:=must_be_valid;
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must_be_valid:=false;
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{ must be made unique }
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set_unique(p^.left);
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{ set we the function result? }
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set_funcret_is_valid(p^.left);
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firstpass(p^.left);
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if codegenerror then
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exit;
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{ assignements to open arrays aren't allowed }
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if is_open_array(p^.left^.resulttype) then
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CGMessage(type_e_mismatch);
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{ test if we can avoid copying string to temp
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as in s:=s+...; (PM) }
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{$ifdef dummyi386}
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if ((p^.right^.treetype=addn) or (p^.right^.treetype=subn)) and
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equal_trees(p^.left,p^.right^.left) and
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(ret_in_acc(p^.left^.resulttype)) and
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(not cs_rangechecking in aktmoduleswitches^) then
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begin
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disposetree(p^.right^.left);
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hp:=p^.right;
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p^.right:=p^.right^.right;
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if hp^.treetype=addn then
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p^.assigntyp:=at_plus
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else
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p^.assigntyp:=at_minus;
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putnode(hp);
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end;
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if p^.assigntyp<>at_normal then
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begin
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{ for fpu type there is no faster way }
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if is_fpu(p^.left^.resulttype) then
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case p^.assigntyp of
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at_plus : p^.right:=gennode(addn,getcopy(p^.left),p^.right);
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at_minus : p^.right:=gennode(subn,getcopy(p^.left),p^.right);
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at_star : p^.right:=gennode(muln,getcopy(p^.left),p^.right);
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at_slash : p^.right:=gennode(slashn,getcopy(p^.left),p^.right);
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end;
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end;
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{$endif i386}
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must_be_valid:=true;
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firstpass(p^.right);
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must_be_valid:=store_valid;
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if codegenerror then
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exit;
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{ some string functions don't need conversion, so treat them separatly }
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if is_shortstring(p^.left^.resulttype) and (assigned(p^.right^.resulttype)) then
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begin
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if not (is_shortstring(p^.right^.resulttype) or
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is_ansistring(p^.right^.resulttype) or
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is_char(p^.right^.resulttype)) then
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begin
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p^.right:=gentypeconvnode(p^.right,p^.left^.resulttype);
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firstpass(p^.right);
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if codegenerror then
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exit;
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end;
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{ we call STRCOPY }
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procinfo.flags:=procinfo.flags or pi_do_call;
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hp:=p^.right;
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{ test for s:=s+anything ... }
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{ the problem is for
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s:=s+s+s;
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this is broken here !! }
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{ while hp^.treetype=addn do hp:=hp^.left;
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if equal_trees(p^.left,hp) then
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begin
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p^.concat_string:=true;
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hp:=p^.right;
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while hp^.treetype=addn do
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begin
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hp^.use_strconcat:=true;
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hp:=hp^.left;
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end;
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end; }
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end
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else
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begin
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p^.right:=gentypeconvnode(p^.right,p^.left^.resulttype);
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firstpass(p^.right);
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if codegenerror then
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exit;
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end;
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{ set assigned flag for varsyms }
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if (p^.left^.treetype=loadn) and
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(p^.left^.symtableentry^.typ=varsym) and
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(pvarsym(p^.left^.symtableentry)^.varstate=vs_declared) then
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pvarsym(p^.left^.symtableentry)^.varstate:=vs_assigned;
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{ check if local proc/func is assigned to procvar }
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if p^.right^.resulttype^.deftype=procvardef then
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test_local_to_procvar(pprocvardef(p^.right^.resulttype),p^.left^.resulttype);
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p^.resulttype:=voiddef;
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{
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p^.registers32:=max(p^.left^.registers32,p^.right^.registers32);
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p^.registersfpu:=max(p^.left^.registersfpu,p^.right^.registersfpu);
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}
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p^.registers32:=p^.left^.registers32+p^.right^.registers32;
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p^.registersfpu:=max(p^.left^.registersfpu,p^.right^.registersfpu);
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{$ifdef SUPPORT_MMX}
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p^.registersmmx:=max(p^.left^.registersmmx,p^.right^.registersmmx);
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{$endif SUPPORT_MMX}
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end;
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{*****************************************************************************
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FirstFuncRet
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*****************************************************************************}
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procedure firstfuncret(var p : ptree);
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begin
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p^.resulttype:=p^.retdef;
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p^.location.loc:=LOC_REFERENCE;
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if ret_in_param(p^.retdef) or
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(@procinfo<>pprocinfo(p^.funcretprocinfo)) then
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p^.registers32:=1;
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{ no claim if setting higher return value_str }
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if must_be_valid and
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(@procinfo=pprocinfo(p^.funcretprocinfo)) and
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not procinfo.funcret_is_valid then
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CGMessage(sym_w_function_result_not_set);
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{
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if count_ref then
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pprocinfo(p^.funcretprocinfo)^.funcret_is_valid:=true;
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}
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end;
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{*****************************************************************************
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FirstArrayConstructRange
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*****************************************************************************}
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procedure firstarrayconstructrange(var p:ptree);
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begin
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firstpass(p^.left);
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firstpass(p^.right);
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calcregisters(p,0,0,0);
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p^.resulttype:=p^.left^.resulttype;
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end;
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{*****************************************************************************
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FirstArrayConstruct
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*****************************************************************************}
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procedure firstarrayconstruct(var p : ptree);
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var
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pd : pdef;
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thp,
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chp,
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hp : ptree;
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len : longint;
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varia : boolean;
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begin
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{ are we allowing array constructor? Then convert it to a set }
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if not allow_array_constructor then
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begin
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arrayconstructor_to_set(p);
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firstpass(p);
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exit;
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end;
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{ only pass left tree, right tree contains next construct if any }
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pd:=p^.constructdef;
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len:=0;
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varia:=false;
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if assigned(p^.left) then
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begin
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hp:=p;
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while assigned(hp) do
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begin
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firstpass(hp^.left);
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if (not get_para_resulttype) and (not p^.novariaallowed) then
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begin
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case hp^.left^.resulttype^.deftype of
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enumdef :
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begin
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hp^.left:=gentypeconvnode(hp^.left,s32bitdef);
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firstpass(hp^.left);
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end;
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orddef :
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begin
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if is_integer(hp^.left^.resulttype) then
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begin
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hp^.left:=gentypeconvnode(hp^.left,s32bitdef);
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firstpass(hp^.left);
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end;
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end;
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floatdef :
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begin
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hp^.left:=gentypeconvnode(hp^.left,bestrealdef^);
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firstpass(hp^.left);
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end;
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stringdef :
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begin
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if p^.cargs then
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begin
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hp^.left:=gentypeconvnode(hp^.left,charpointerdef);
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firstpass(hp^.left);
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end;
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end;
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recorddef,
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arraydef :
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CGMessage(type_e_wrong_type_in_array_constructor);
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end;
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end;
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if (pd=nil) then
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pd:=hp^.left^.resulttype
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else
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begin
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if ((p^.novariaallowed) or (not varia)) and
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(not is_equal(pd,hp^.left^.resulttype)) then
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begin
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{ if both should be equal try inserting a conversion }
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if p^.novariaallowed then
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begin
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hp^.left:=gentypeconvnode(hp^.left,pd);
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firstpass(hp^.left);
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end;
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varia:=true;
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end;
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end;
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inc(len);
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hp:=hp^.right;
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end;
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{ swap the tree for cargs }
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if p^.cargs and (not p^.cargswap) then
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begin
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chp:=nil;
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hp:=p;
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while assigned(hp) do
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begin
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thp:=hp^.right;
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hp^.right:=chp;
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chp:=hp;
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hp:=thp;
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end;
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p:=chp;
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p^.cargs:=true;
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p^.cargswap:=true;
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end;
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end;
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calcregisters(p,0,0,0);
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{ looks a little bit dangerous to me }
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{ len-1 gives problems with is_open_array if len=0, }
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{ is_open_array checks now for isconstructor (FK) }
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{ skip if already done ! (PM) }
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if not assigned(p^.resulttype) or
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(p^.resulttype^.deftype<>arraydef) or
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not parraydef(p^.resulttype)^.IsConstructor or
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(parraydef(p^.resulttype)^.lowrange<>0) or
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(parraydef(p^.resulttype)^.highrange<>len-1) then
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p^.resulttype:=new(parraydef,init(0,len-1,s32bitdef));
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parraydef(p^.resulttype)^.definition:=pd;
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parraydef(p^.resulttype)^.IsConstructor:=true;
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parraydef(p^.resulttype)^.IsVariant:=varia;
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p^.location.loc:=LOC_MEM;
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end;
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{*****************************************************************************
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Type
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*****************************************************************************}
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procedure firsttype(var p : ptree);
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begin
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{ do nothing, p^.resulttype is already set }
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end;
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end.
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{
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$Log$
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Revision 1.44 1999-09-11 19:47:26 florian
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* bug fix for @tobject.method, fixes bug 557, 605 and 606
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Revision 1.43 1999/09/11 09:08:34 florian
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* fixed bug 596
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* fixed some problems with procedure variables and procedures of object,
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especially in TP mode. Procedure of object doesn't apply only to classes,
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it is also allowed for objects !!
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Revision 1.42 1999/09/10 18:48:11 florian
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* some bug fixes (e.g. must_be_valid and procinfo.funcret_is_valid)
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* most things for stored properties fixed
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Revision 1.41 1999/08/16 23:23:41 peter
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* arrayconstructor -> openarray type conversions for element types
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Revision 1.40 1999/08/13 21:33:17 peter
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* support for array constructors extended and more error checking
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Revision 1.39 1999/08/05 16:53:24 peter
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* V_Fatal=1, all other V_ are also increased
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* Check for local procedure when assigning procvar
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* fixed comment parsing because directives
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* oldtp mode directives better supported
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* added some messages to errore.msg
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Revision 1.38 1999/08/04 00:23:41 florian
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* renamed i386asm and i386base to cpuasm and cpubase
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Revision 1.37 1999/08/03 22:03:33 peter
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* moved bitmask constants to sets
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* some other type/const renamings
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Revision 1.36 1999/07/22 09:38:00 florian
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+ resourcestring implemented
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+ start of longstring support
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Revision 1.35 1999/06/17 13:19:59 pierre
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* merged from 0_99_12 branch
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Revision 1.34.2.1 1999/06/17 12:33:39 pierre
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* avoid warning with extdebug for arrayconstruct
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Revision 1.34 1999/06/01 19:26:39 peter
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* fixed bug 249
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Revision 1.33 1999/05/27 19:45:21 peter
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* removed oldasm
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* plabel -> pasmlabel
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* -a switches to source writing automaticly
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* assembler readers OOPed
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* asmsymbol automaticly external
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* jumptables and other label fixes for asm readers
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Revision 1.32 1999/05/23 18:42:22 florian
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* better error recovering in typed constants
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* some problems with arrays of const fixed, some problems
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due my previous
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- the location type of array constructor is now LOC_MEM
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- the pushing of high fixed
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- parameter copying fixed
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- zero temp. allocation removed
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* small problem in the assembler writers fixed:
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ref to nil wasn't written correctly
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Revision 1.31 1999/05/19 15:26:41 florian
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* if a non local variables isn't initialized the compiler doesn't write
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any longer "local var. seems not to be ..."
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Revision 1.30 1999/05/19 10:31:55 florian
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* two bugs reported by Romio (bugs 13) are fixed:
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- empty array constructors are now handled correctly (e.g. for sysutils.format)
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- comparsion of ansistrings was sometimes coded wrong
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Revision 1.29 1999/05/17 23:51:45 peter
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* with temp vars now use a reference with a persistant temp instead
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of setting datasize
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Revision 1.27 1999/05/12 00:20:02 peter
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* removed R_DEFAULT_SEG
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* uniform float names
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Revision 1.26 1999/05/06 09:05:36 peter
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* generic write_float and str_float
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* fixed constant float conversions
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Revision 1.25 1999/05/01 13:24:54 peter
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* merged nasm compiler
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* old asm moved to oldasm/
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Revision 1.24 1999/04/28 06:02:17 florian
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* changes of Bruessel:
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+ message handler can now take an explicit self
|
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* typinfo fixed: sometimes the type names weren't written
|
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* the type checking for pointer comparisations and subtraction
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and are now more strict (was also buggy)
|
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* small bug fix to link.pas to support compiling on another
|
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drive
|
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* probable bug in popt386 fixed: call/jmp => push/jmp
|
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transformation didn't count correctly the jmp references
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+ threadvar support
|
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* warning if ln/sqrt gets an invalid constant argument
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Revision 1.23 1999/04/21 21:57:33 pierre
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* previous log corrected
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Revision 1.22 1999/04/21 16:31:47 pierre
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* some wrong code in firstfuncret corrected
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Revision 1.21 1999/04/01 21:59:57 peter
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* type error for array constructor with array,record as argument
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Revision 1.20 1999/03/24 23:17:39 peter
|
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* fixed bugs 212,222,225,227,229,231,233
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Revision 1.19 1999/03/18 11:21:52 peter
|
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* convert only to s32bit if integer or enum
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Revision 1.18 1999/03/16 21:02:10 peter
|
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* all array of const enum/ord are converted to s32bit
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Revision 1.17 1999/03/10 13:24:23 pierre
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* array of const type to definition field
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Revision 1.16 1999/02/22 02:15:52 peter
|
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* updates for ag386bin
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Revision 1.15 1999/02/15 13:13:19 pierre
|
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* fix for bug0216
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Revision 1.14 1999/01/27 00:13:58 florian
|
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* "procedure of object"-stuff fixed
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Revision 1.13 1999/01/21 16:41:07 pierre
|
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* fix for constructor inside with statements
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Revision 1.12 1998/12/30 13:41:19 peter
|
|
* released valuepara
|
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Revision 1.11 1998/11/18 17:45:28 peter
|
|
* fixes for VALUEPARA
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|
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Revision 1.10 1998/11/18 15:44:23 peter
|
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* VALUEPARA for tp7 compatible value parameters
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Revision 1.9 1998/11/17 00:36:49 peter
|
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* more ansistring fixes
|
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Revision 1.8 1998/11/10 10:09:18 peter
|
|
* va_list -> array of const
|
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Revision 1.7 1998/11/05 14:26:48 peter
|
|
* fixed variant warning with was sometimes said with sets
|
|
|
|
Revision 1.6 1998/10/19 08:55:12 pierre
|
|
* wrong stabs info corrected once again !!
|
|
+ variable vmt offset with vmt field only if required
|
|
implemented now !!!
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|
|
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Revision 1.5 1998/10/06 20:49:12 peter
|
|
* m68k compiler compiles again
|
|
|
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Revision 1.4 1998/09/28 11:07:40 peter
|
|
+ floatdef support for array of const
|
|
|
|
Revision 1.3 1998/09/27 10:16:27 florian
|
|
* type casts pchar<->ansistring fixed
|
|
* ansistring[..] calls does now an unique call
|
|
|
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Revision 1.2 1998/09/24 15:13:48 peter
|
|
* fixed type node which was always set to void :(
|
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|
|
Revision 1.1 1998/09/23 20:42:24 peter
|
|
* splitted pass_1
|
|
|
|
}
|