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4ce4742bc8
fpc/compiler/ncgmem.pas
Jonas Maebe 4ce4742bc8 * mark invisible high parameters of open arrays/arrays of const 
of parent procedures which are implicitly accessed from within
    nested procedures for range checking purposes as non-regable in
    the resulttype pass of the nested procedure (as opposed to in its
    pass1/pass2, because by then the regvar assignment of the parent
    procedure is already finished) (mantis #8975)
  * related fix regarding checking whether the high parameter actually
    exists (must check calling convention of the procedure to which the
    high parameter belongs, which is not the same as checking that of
    the current procedure in case of nested procedures)

git-svn-id: trunk@7512 -
2007-05-29 13:42:49 +00:00

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{
Copyright (c) 1998-2002 by Florian Klaempfl
Generate assembler for memory related nodes which are
the same for all (most?) processors
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit ncgmem;
{$i fpcdefs.inc}
interface
uses
globtype,cgbase,cpuinfo,cpubase,
node,nmem;
type
tcgloadvmtaddrnode = class(tloadvmtaddrnode)
procedure pass_generate_code;override;
end;
tcgloadparentfpnode = class(tloadparentfpnode)
procedure pass_generate_code;override;
end;
tcgaddrnode = class(taddrnode)
procedure pass_generate_code;override;
end;
tcgderefnode = class(tderefnode)
procedure pass_generate_code;override;
end;
tcgsubscriptnode = class(tsubscriptnode)
procedure pass_generate_code;override;
end;
tcgwithnode = class(twithnode)
procedure pass_generate_code;override;
end;
tcgvecnode = class(tvecnode)
private
procedure rangecheck_array;
protected
function get_mul_size : aint;
{# This routine is used to calculate the address of the reference.
On entry reg contains the index in the array,
and l contains the size of each element in the array.
This routine should update location.reference correctly,
so it points to the correct address.
}
procedure update_reference_reg_mul(reg:tregister;l:aint);virtual;
procedure update_reference_reg_packed(reg:tregister;l:aint);virtual;
procedure second_wideansistring;virtual;
procedure second_dynamicarray;virtual;
public
procedure pass_generate_code;override;
end;
implementation
uses
systems,
cutils,verbose,globals,
symconst,symdef,symsym,symtable,defutil,paramgr,
aasmbase,aasmtai,aasmdata,
procinfo,pass_2,parabase,
pass_1,nld,ncon,nadd,nutils,
cgutils,cgobj,
tgobj,ncgutil
;
{*****************************************************************************
TCGLOADVMTADDRNODE
*****************************************************************************}
procedure tcgloadvmtaddrnode.pass_generate_code;
var
href : treference;
begin
location_reset(location,LOC_REGISTER,OS_ADDR);
if (left.nodetype=typen) then
begin
reference_reset_symbol(href,
current_asmdata.RefAsmSymbol(tobjectdef(tclassrefdef(resultdef).pointeddef).vmt_mangledname),0);
location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,location.register);
end
else
begin
{ left contains self, load vmt from self }
secondpass(left);
gen_load_vmt_register(current_asmdata.CurrAsmList,tobjectdef(left.resultdef),left.location,location.register);
end;
end;
{*****************************************************************************
TCGLOADPARENTFPNODE
*****************************************************************************}
procedure tcgloadparentfpnode.pass_generate_code;
var
currpi : tprocinfo;
hsym : tparavarsym;
href : treference;
begin
if (current_procinfo.procdef.parast.symtablelevel=parentpd.parast.symtablelevel) then
begin
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=current_procinfo.framepointer;
end
else
begin
currpi:=current_procinfo;
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
{ load framepointer of current proc }
hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
if not assigned(hsym) then
internalerror(200309281);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,hsym.localloc,location.register);
{ walk parents }
while (currpi.procdef.owner.symtablelevel>parentpd.parast.symtablelevel) do
begin
currpi:=currpi.parent;
if not assigned(currpi) then
internalerror(200311201);
hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
if not assigned(hsym) then
internalerror(200309282);
if hsym.localloc.loc<>LOC_REFERENCE then
internalerror(200309283);
reference_reset_base(href,location.register,hsym.localloc.reference.offset);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,location.register);
end;
end;
end;
{*****************************************************************************
TCGADDRNODE
*****************************************************************************}
procedure tcgaddrnode.pass_generate_code;
var
tmpref: treference;
begin
secondpass(left);
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
if not(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
internalerror(2006111510);
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,left.location.reference,location.register);
end;
{*****************************************************************************
TCGDEREFNODE
*****************************************************************************}
procedure tcgderefnode.pass_generate_code;
var
paraloc1 : tcgpara;
begin
secondpass(left);
location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
case left.location.loc of
LOC_CREGISTER,
LOC_REGISTER:
begin
maybechangeloadnodereg(current_asmdata.CurrAsmList,left,true);
{$ifdef cpu_uses_separate_address_registers}
if getregtype(left.location.register)<>R_ADDRESSREGISTER then
begin
location.reference.base := cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.register,
location.reference.base);
end
else
{$endif}
location.reference.base := left.location.register;
end;
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference.base);
end;
LOC_CONSTANT:
begin
location.reference.offset:=left.location.value;
end;
else
internalerror(200507031);
end;
if (cs_use_heaptrc in current_settings.globalswitches) and
(cs_checkpointer in current_settings.localswitches) and
not(cs_compilesystem in current_settings.moduleswitches) and
not(tpointerdef(left.resultdef).is_far) and
not(nf_no_checkpointer in flags) then
begin
paraloc1.init;
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
paraloc1.done;
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
end;
{*****************************************************************************
TCGSUBSCRIPTNODE
*****************************************************************************}
procedure tcgsubscriptnode.pass_generate_code;
var
paraloc1 : tcgpara;
sref: tsubsetreference;
begin
secondpass(left);
if codegenerror then
exit;
paraloc1.init;
{ classes and interfaces must be dereferenced implicit }
if is_class_or_interface(left.resultdef) then
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
case left.location.loc of
LOC_CREGISTER,
LOC_REGISTER:
begin
{$ifdef cpu_uses_separate_address_registers}
if getregtype(left.location.register)<>R_ADDRESSREGISTER then
begin
location.reference.base:=rg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,
left.location.register,location.reference.base);
end
else
{$endif}
location.reference.base := left.location.register;
end;
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference.base);
end;
end;
{ implicit deferencing }
if (cs_use_heaptrc in current_settings.globalswitches) and
(cs_checkpointer in current_settings.localswitches) and
not(cs_compilesystem in current_settings.moduleswitches) then
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
end
else if is_interfacecom(left.resultdef) then
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
tg.GetTempTyped(current_asmdata.CurrAsmList,left.resultdef,tt_normal,location.reference);
cg.a_load_loc_ref(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference);
{ implicit deferencing also for interfaces }
if (cs_use_heaptrc in current_settings.globalswitches) and
(cs_checkpointer in current_settings.localswitches) and
not(cs_compilesystem in current_settings.moduleswitches) then
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
end
else
begin
location_copy(location,left.location);
{ some abi's require that functions return (some) records in }
{ registers }
case location.loc of
LOC_REFERENCE,
LOC_CREFERENCE:
;
LOC_REGISTER,
LOC_CREGISTER:
begin
if (left.resultdef.size > sizeof(aint)) then
location_force_mem(current_asmdata.CurrAsmList,location)
else
begin
if (left.location.loc = LOC_REGISTER) then
location.loc := LOC_SUBSETREG
else
location.loc := LOC_CSUBSETREG;
location.size:=def_cgsize(resultdef);
location.sreg.subsetreg := left.location.register;
location.sreg.subsetregsize := left.location.size;
if not is_packed_record_or_object(left.resultdef) then
begin
if (target_info.endian = ENDIAN_BIG) then
location.sreg.startbit := (tcgsize2size[location.sreg.subsetregsize] - tcgsize2size[location.size] - vs.fieldoffset) * 8
else
location.sreg.startbit := (vs.fieldoffset * 8);
location.sreg.bitlen := tcgsize2size[location.size] * 8;
end
else
begin
location.sreg.bitlen := resultdef.packedbitsize;
if (target_info.endian = ENDIAN_BIG) then
location.sreg.startbit := (tcgsize2size[location.sreg.subsetregsize]*8 - location.sreg.bitlen) - vs.fieldoffset
else
location.sreg.startbit := vs.fieldoffset;
end;
end;
end;
LOC_SUBSETREG,
LOC_CSUBSETREG:
begin
location.size:=def_cgsize(resultdef);
if (target_info.endian = ENDIAN_BIG) then
inc(location.sreg.startbit, (left.resultdef.size - tcgsize2size[location.size] - vs.fieldoffset) * 8)
else
inc(location.sreg.startbit, vs.fieldoffset * 8);
location.sreg.bitlen := tcgsize2size[location.size] * 8;
end;
else
internalerror(2006031901);
end;
end;
if (location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
begin
if not is_packed_record_or_object(left.resultdef) then
begin
inc(location.reference.offset,vs.fieldoffset);
{$ifdef SUPPORT_UNALIGNED}
{ packed? }
if (vs.owner.defowner.typ in [recorddef,objectdef]) and
(tabstractrecordsymtable(vs.owner).usefieldalignment=1) then
location.reference.alignment:=1;
{$endif SUPPORT_UNALIGNED}
end
else if (vs.fieldoffset mod 8 = 0) and
(resultdef.packedbitsize mod 8 = 0) and
{ is different in case of e.g. packenum 2 and an enum }
{ which fits in 8 bits }
(resultdef.size*8 = resultdef.packedbitsize) then
begin
inc(location.reference.offset,vs.fieldoffset div 8);
if (resultdef.size*8 <> resultdef.packedbitsize) then
internalerror(2006082013);
{ packed records always have an alignment of 1 }
location.reference.alignment:=1;
end
else
begin
sref.ref:=location.reference;
sref.ref.alignment:=1;
sref.bitindexreg:=NR_NO;
inc(sref.ref.offset,vs.fieldoffset div 8);
sref.startbit:=vs.fieldoffset mod 8;
sref.bitlen:=resultdef.packedbitsize;
if (left.location.loc=LOC_REFERENCE) then
location.loc:=LOC_SUBSETREF
else
location.loc:=LOC_CSUBSETREF;
location.sref:=sref;
end;
{ also update the size of the location }
location.size:=def_cgsize(resultdef);
end;
paraloc1.done;
end;
{*****************************************************************************
TCGWITHNODE
*****************************************************************************}
procedure tcgwithnode.pass_generate_code;
begin
location_reset(location,LOC_VOID,OS_NO);
if assigned(left) then
secondpass(left);
end;
{*****************************************************************************
TCGVECNODE
*****************************************************************************}
function tcgvecnode.get_mul_size : aint;
begin
if nf_memindex in flags then
get_mul_size:=1
else
begin
if (left.resultdef.typ=arraydef) then
if not is_packed_array(left.resultdef) then
get_mul_size:=tarraydef(left.resultdef).elesize
else
get_mul_size:=tarraydef(left.resultdef).elepackedbitsize
else
get_mul_size:=resultdef.size;
end
end;
procedure tcgvecnode.update_reference_reg_mul(reg:tregister;l:aint);
var
hreg: tregister;
begin
if location.reference.base=NR_NO then
begin
if l<>1 then
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
location.reference.base:=reg;
end
else if location.reference.index=NR_NO then
begin
if l<>1 then
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
location.reference.index:=reg;
end
else
begin
hreg := cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,location.reference,hreg);
reference_reset_base(location.reference,hreg,0);
{ insert new index register }
if l<>1 then
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
location.reference.index:=reg;
end;
end;
procedure tcgvecnode.update_reference_reg_packed(reg:tregister;l:aint);
var
sref: tsubsetreference;
offsetreg: tregister;
byteoffs, bitoffs, alignpower: aint;
temp : longint;
begin
if ((l mod 8) = 0) and
ispowerof2(l div 8,temp) then
begin
update_reference_reg_mul(reg,l div 8);
exit;
end;
if (l > 8*sizeof(aint)) then
internalerror(200608051);
sref.ref := location.reference;
offsetreg := cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,tarraydef(left.resultdef).lowrange,reg);
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_INT,l,reg);
{ keep alignment for index }
sref.ref.alignment := left.resultdef.alignment;
if not ispowerof2(sref.ref.alignment,temp) then
internalerror(2006081201);
alignpower:=temp;
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHR,OS_ADDR,3+alignpower,reg,offsetreg);
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SHL,OS_ADDR,alignpower,offsetreg);
if (sref.ref.base = NR_NO) then
sref.ref.base := offsetreg
else if (sref.ref.index = NR_NO) then
sref.ref.index := offsetreg
else
begin
cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_ADD,OS_ADDR,sref.ref.base,offsetreg);
sref.ref.base := offsetreg;
end;
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_AND,OS_INT,(1 shl (3+alignpower))-1,reg);
sref.bitindexreg := reg;
sref.startbit := 0;
sref.bitlen := resultdef.packedbitsize;
if (left.location.loc = LOC_REFERENCE) then
location.loc := LOC_SUBSETREF
else
location.loc := LOC_CSUBSETREF;
location.sref := sref;
end;
procedure tcgvecnode.second_wideansistring;
begin
end;
procedure tcgvecnode.second_dynamicarray;
begin
end;
procedure tcgvecnode.rangecheck_array;
var
hightree : tnode;
poslabel,
neglabel : tasmlabel;
hreg : tregister;
paraloc1,paraloc2 : tcgpara;
begin
paraloc1.init;
paraloc2.init;
if is_open_array(left.resultdef) or
is_array_of_const(left.resultdef) then
begin
{ cdecl functions don't have high() so we can not check the range }
{ (can't use current_procdef, since it may be a nested procedure) }
if not(tprocdef(tparasymtable(tparavarsym(tloadnode(left).symtableentry).owner).defowner).proccalloption in [pocall_cdecl,pocall_cppdecl]) then
begin
{ Get high value }
hightree:=load_high_value_node(tparavarsym(tloadnode(left).symtableentry));
{ it must be available }
if not assigned(hightree) then
internalerror(200212201);
firstpass(hightree);
secondpass(hightree);
{ generate compares }
if (right.location.loc in [LOC_REGISTER,LOC_CREGISTER]) then
hreg:=cg.makeregsize(current_asmdata.CurrAsmList,right.location.register,OS_INT)
else
begin
hreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_INT,right.location,hreg);
end;
current_asmdata.getjumplabel(neglabel);
current_asmdata.getjumplabel(poslabel);
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_LT,0,hreg,poslabel);
cg.a_cmp_loc_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_BE,hightree.location,hreg,neglabel);
cg.a_label(current_asmdata.CurrAsmList,poslabel);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RANGEERROR');
cg.a_label(current_asmdata.CurrAsmList,neglabel);
{ release hightree }
hightree.free;
end;
end
else
if is_dynamic_array(left.resultdef) then
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.getintparaloc(pocall_default,2,paraloc2);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.a_param_loc(current_asmdata.CurrAsmList,right.location,paraloc2);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_loc(current_asmdata.CurrAsmList,left.location,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_DYNARRAY_RANGECHECK');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end
else
cg.g_rangecheck(current_asmdata.CurrAsmList,right.location,right.resultdef,left.resultdef);
paraloc1.done;
paraloc2.done;
end;
procedure tcgvecnode.pass_generate_code;
var
offsetdec,
extraoffset : aint;
t : tnode;
href : treference;
otl,ofl : tasmlabel;
newsize : tcgsize;
mulsize,
bytemulsize,
alignpow : aint;
isjump : boolean;
paraloc1,
paraloc2 : tcgpara;
subsetref : tsubsetreference;
temp : longint;
begin
paraloc1.init;
paraloc2.init;
mulsize:=get_mul_size;
if not is_packed_array(left.resultdef) then
bytemulsize:=mulsize
else
bytemulsize:=mulsize div 8;
newsize:=def_cgsize(resultdef);
secondpass(left);
if left.location.loc=LOC_CREFERENCE then
location_reset(location,LOC_CREFERENCE,newsize)
else
location_reset(location,LOC_REFERENCE,newsize);
{ an ansistring needs to be dereferenced }
if is_ansistring(left.resultdef) or
is_widestring(left.resultdef) then
begin
if nf_callunique in flags then
internalerror(200304236);
{DM!!!!!}
case left.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
begin
{$ifdef m68k}
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.register,location.reference.base);
{$else m68k}
location.reference.base:=left.location.register;
{$endif m68k}
end;
LOC_CREFERENCE,
LOC_REFERENCE :
begin
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.reference,location.reference.base);
end;
else
internalerror(2002032218);
end;
{ check for a zero length string,
we can use the ansistring routine here }
if (cs_check_range in current_settings.localswitches) then
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,location.reference.base,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_CHECKZERO');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
{ in ansistrings/widestrings S[1] is p<w>char(S)[0] !! }
if is_ansistring(left.resultdef) then
offsetdec:=1
else
offsetdec:=2;
dec(location.reference.offset,offsetdec);
end
else if is_dynamic_array(left.resultdef) then
begin
case left.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
location.reference.base:=left.location.register;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,
left.location.reference,location.reference.base);
end;
else
internalerror(2002032219);
end;
end
else
location_copy(location,left.location);
{ location must be memory }
if not(location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
internalerror(200411013);
{ offset can only differ from 0 if arraydef }
if (left.resultdef.typ=arraydef) and
not(is_dynamic_array(left.resultdef)) and
(not(is_packed_array(left.resultdef)) or
((mulsize mod 8 = 0) and
ispowerof2(mulsize div 8,temp))) then
dec(location.reference.offset,bytemulsize*tarraydef(left.resultdef).lowrange);
if right.nodetype=ordconstn then
begin
{ offset can only differ from 0 if arraydef }
case left.resultdef.typ of
arraydef :
begin
if not(is_open_array(left.resultdef)) and
not(is_array_of_const(left.resultdef)) and
not(is_dynamic_array(left.resultdef)) then
begin
if (tordconstnode(right).value>tarraydef(left.resultdef).highrange) or
(tordconstnode(right).value<tarraydef(left.resultdef).lowrange) then
begin
{ this should be caught in the typecheckpass! (JM) }
if (cs_check_range in current_settings.localswitches) then
CGMessage(parser_e_range_check_error)
else
CGMessage(parser_w_range_check_error);
end;
end
else
begin
{ range checking for open and dynamic arrays needs
runtime code }
secondpass(right);
if (cs_check_range in current_settings.localswitches) then
rangecheck_array;
end;
end;
stringdef :
begin
if (cs_check_range in current_settings.localswitches) then
begin
case tstringdef(left.resultdef).stringtype of
{ it's the same for ansi- and wide strings }
st_widestring,
st_ansistring:
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.getintparaloc(pocall_default,2,paraloc2);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.a_param_const(current_asmdata.CurrAsmList,OS_INT,tordconstnode(right).value,paraloc2);
href:=location.reference;
dec(href.offset,sizeof(aint)-offsetdec);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_ref(current_asmdata.CurrAsmList,OS_INT,href,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_RANGECHECK');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
st_shortstring:
begin
{!!!!!!!!!!!!!!!!!}
{ if this one is implemented making use of the high parameter for openshortstrings, update ncgutils.do_get_used_regvars() too (JM) }
end;
st_longstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
end;
end;
end;
end;
if not(is_packed_array(left.resultdef)) or
((mulsize mod 8 = 0) and
ispowerof2(mulsize div 8,temp)) then
begin
inc(location.reference.offset,
bytemulsize*tordconstnode(right).value);
{ don't do this for floats etc.; needed to properly set the }
{ size for bitpacked arrays (e.g. a bitpacked array of }
{ enums who are size 2 but fit in one byte -> in the array }
{ they will be one byte and have to be stored like that) }
if is_packed_array(left.resultdef) and
(tcgsize2size[newsize] <> bytemulsize) then
newsize:=int_cgsize(bytemulsize);
end
else
begin
subsetref.ref := location.reference;
subsetref.ref.alignment := left.resultdef.alignment;
if not ispowerof2(subsetref.ref.alignment,temp) then
internalerror(2006081212);
alignpow:=temp;
inc(subsetref.ref.offset,((mulsize * (tordconstnode(right).value-tarraydef(left.resultdef).lowrange)) shr (3+alignpow)) shl alignpow);
subsetref.bitindexreg := NR_NO;
subsetref.startbit := (mulsize * (tordconstnode(right).value-tarraydef(left.resultdef).lowrange)) and ((1 shl (3+alignpow))-1);
subsetref.bitlen := resultdef.packedbitsize;
if (left.location.loc = LOC_REFERENCE) then
location.loc := LOC_SUBSETREF
else
location.loc := LOC_CSUBSETREF;
location.sref := subsetref;
end;
end
else
{ not nodetype=ordconstn }
begin
if (cs_opt_level1 in current_settings.optimizerswitches) and
{ if we do range checking, we don't }
{ need that fancy code (it would be }
{ buggy) }
not(cs_check_range in current_settings.localswitches) and
(left.resultdef.typ=arraydef) and
not is_packed_array(left.resultdef) then
begin
extraoffset:=0;
if (right.nodetype=addn) then
begin
if taddnode(right).right.nodetype=ordconstn then
begin
extraoffset:=tordconstnode(taddnode(right).right).value;
t:=taddnode(right).left;
{ First pass processed this with the assumption }
{ that there was an add node which may require an }
{ extra register. Fake it or die with IE10 (JM) }
t.registersint := taddnode(right).registersint;
taddnode(right).left:=nil;
right.free;
right:=t;
end
else if taddnode(right).left.nodetype=ordconstn then
begin
extraoffset:=tordconstnode(taddnode(right).left).value;
t:=taddnode(right).right;
t.registersint := right.registersint;
taddnode(right).right:=nil;
right.free;
right:=t;
end;
end
else if (right.nodetype=subn) then
begin
if taddnode(right).right.nodetype=ordconstn then
begin
extraoffset:=-tordconstnode(taddnode(right).right).value;
t:=taddnode(right).left;
t.registersint := right.registersint;
taddnode(right).left:=nil;
right.free;
right:=t;
end
{ You also have to negate right.right in this case! I can't add an
unaryminusn without causing a crash, so I've disabled it (JM)
else if right.left.nodetype=ordconstn then
begin
extraoffset:=right.left.value;
t:=right.right;
t^.registersint := right.registersint;
putnode(right);
putnode(right.left);
right:=t;
end;}
end;
inc(location.reference.offset,
mulsize*extraoffset);
end;
{ calculate from left to right }
if not(location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
internalerror(200304237);
isjump:=(right.expectloc=LOC_JUMP);
if isjump then
begin
otl:=current_procinfo.CurrTrueLabel;
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
ofl:=current_procinfo.CurrFalseLabel;
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
end;
secondpass(right);
{ if mulsize = 1, we won't have to modify the index }
location_force_reg(current_asmdata.CurrAsmList,right.location,OS_ADDR,not is_packed_array(left.resultdef) and (mulsize = 1) );
if isjump then
begin
current_procinfo.CurrTrueLabel:=otl;
current_procinfo.CurrFalseLabel:=ofl;
end
else if (right.location.loc = LOC_JUMP) then
internalerror(2006010801);
{ only range check now, we can't range check loc_flags/loc_jump }
if cs_check_range in current_settings.localswitches then
begin
if left.resultdef.typ=arraydef then
rangecheck_array;
end;
{ produce possible range check code: }
if cs_check_range in current_settings.localswitches then
begin
if left.resultdef.typ=arraydef then
begin
{ done defore (PM) }
end
else if (left.resultdef.typ=stringdef) then
begin
case tstringdef(left.resultdef).stringtype of
{ it's the same for ansi- and wide strings }
st_widestring,
st_ansistring:
begin
paramanager.getintparaloc(pocall_default,1,paraloc1);
paramanager.getintparaloc(pocall_default,2,paraloc2);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.a_param_reg(current_asmdata.CurrAsmList,OS_INT,right.location.register,paraloc2);
href:=location.reference;
dec(href.offset,sizeof(aint)-offsetdec);
//dec(href.offset,7);
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
cg.a_param_ref(current_asmdata.CurrAsmList,OS_INT,href,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_RANGECHECK');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
st_shortstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
st_longstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
end;
end;
end;
{ insert the register and the multiplication factor in the
reference }
if not is_packed_array(left.resultdef) then
update_reference_reg_mul(right.location.register,mulsize)
else
update_reference_reg_packed(right.location.register,mulsize);
end;
location.size:=newsize;
paraloc1.done;
paraloc2.done;
end;
begin
cloadvmtaddrnode:=tcgloadvmtaddrnode;
cloadparentfpnode:=tcgloadparentfpnode;
caddrnode:=tcgaddrnode;
cderefnode:=tcgderefnode;
csubscriptnode:=tcgsubscriptnode;
cwithnode:=tcgwithnode;
cvecnode:=tcgvecnode;
end.
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