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fpc/compiler/ncgmem.pas

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{
$Id$
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.
****************************************************************************
}
{ This unit generate assembler for memory related nodes.
}
unit ncgmem;
{$i fpcdefs.inc}
interface
uses
cpuinfo,cpubase,
node,nmem;
type
tcgloadvmtnode = class(tloadvmtnode)
procedure pass_2;override;
end;
tcghnewnode = class(thnewnode)
procedure pass_2;override;
end;
tcghdisposenode = class(thdisposenode)
procedure pass_2;override;
end;
tcgaddrnode = class(taddrnode)
procedure pass_2;override;
end;
tcgdoubleaddrnode = class(tdoubleaddrnode)
procedure pass_2;override;
end;
tcgderefnode = class(tderefnode)
procedure pass_2;override;
end;
tcgsubscriptnode = class(tsubscriptnode)
procedure pass_2;override;
end;
tcgselfnode = class(tselfnode)
procedure pass_2;override;
end;
tcgwithnode = class(twithnode)
procedure pass_2;override;
end;
tcgvecnode = class(tvecnode)
private
procedure rangecheck_array;
protected
function get_mul_size : longint;
{# This routine is used to calculate the address of the reference.
On entry reg contains the index in the array,
and l contains the size of each element in the array.
This routine should update location.reference correctly,
so it points to the correct address.
}
procedure update_reference_reg_mul(reg:tregister;l:aword);virtual;
procedure second_wideansistring;virtual;
procedure second_dynamicarray;virtual;
public
procedure pass_2;override;
end;
implementation
uses
{$ifdef delphi}
sysutils,
{$else}
strings,
{$endif}
{$ifdef GDB}
gdb,
{$endif GDB}
globtype,systems,
cutils,verbose,globals,
symconst,symtype,symdef,symsym,symtable,defutil,paramgr,
aasmbase,aasmtai,aasmcpu,
cginfo,cgbase,pass_2,
pass_1,nld,ncon,nadd,
cgobj,tgobj,rgobj,ncgutil,symbase
;
{*****************************************************************************
TCGLOADNODE
*****************************************************************************}
procedure tcgloadvmtnode.pass_2;
var
href : treference;
begin
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getaddressregister(exprasmlist);
{ on 80386, LEA is the same as mov imm32 }
reference_reset_symbol(href,
objectlibrary.newasmsymbol(tobjectdef(tclassrefdef(resulttype.def).pointertype.def).vmt_mangledname),0);
cg.a_loadaddr_ref_reg(exprasmlist,href,location.register);
end;
{*****************************************************************************
TCGHNEWNODE
*****************************************************************************}
procedure tcghnewnode.pass_2;
begin
{ completely resolved in first pass now }
end;
{*****************************************************************************
TCGHDISPOSENODE
*****************************************************************************}
procedure tcghdisposenode.pass_2;
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
secondpass(left);
if codegenerror then
exit;
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.base := rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,left.location.register,
location.reference.base);
end
else
location.reference.base := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.base);
end;
else
internalerror(2002032217);
end;
end;
{*****************************************************************************
TCGADDRNODE
*****************************************************************************}
procedure tcgaddrnode.pass_2;
begin
secondpass(left);
{ when loading procvar we do nothing with this node, so load the
location of left }
if nf_procvarload in flags then
begin
location_copy(location,left.location);
exit;
end;
location_release(exprasmlist,left.location);
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getaddressregister(exprasmlist);
{@ on a procvar means returning an address to the procedure that
is stored in it.}
{ yes but left.symtableentry can be nil
for example on self !! }
{ symtableentry can be also invalid, if left is no tree node }
if (m_tp_procvar in aktmodeswitches) and
(left.nodetype=loadn) and
assigned(tloadnode(left).symtableentry) and
(tloadnode(left).symtableentry.typ=varsym) and
(tvarsym(tloadnode(left).symtableentry).vartype.def.deftype=procvardef) then
cg.a_load_ref_reg(exprasmlist,OS_ADDR,left.location.reference,
location.register)
else
begin
cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,
location.register);
end;
end;
{*****************************************************************************
TCGDOUBLEADDRNODE
*****************************************************************************}
procedure tcgdoubleaddrnode.pass_2;
begin
secondpass(left);
location_release(exprasmlist,left.location);
location_reset(location,LOC_REGISTER,OS_ADDR);
location.register:=rg.getaddressregister(exprasmlist);
cg.a_loadaddr_ref_reg(exprasmlist,left.location.reference,
location.register);
end;
{*****************************************************************************
TCGDEREFNODE
*****************************************************************************}
procedure tcgderefnode.pass_2;
begin
secondpass(left);
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.base := rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,left.location.register,
location.reference.base);
end
else
location.reference.base := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.base);
end;
end;
if (cs_gdb_heaptrc in aktglobalswitches) and
(cs_checkpointer in aktglobalswitches) and
not(cs_compilesystem in aktmoduleswitches) and
(not tpointerdef(left.resulttype.def).is_far) then
begin
cg.a_param_reg(exprasmlist, OS_ADDR,location.reference.base,paramanager.getintparaloc(1));
cg.a_call_name(exprasmlist,'FPC_CHECKPOINTER');
end;
end;
{*****************************************************************************
TCGSUBSCRIPTNODE
*****************************************************************************}
procedure tcgsubscriptnode.pass_2;
begin
secondpass(left);
if codegenerror then
exit;
{ classes and interfaces must be dereferenced implicit }
if is_class_or_interface(left.resulttype.def) then
begin
location_reset(location,LOC_REFERENCE,def_cgsize(resulttype.def));
case left.location.loc of
LOC_REGISTER:
begin
if not rg.isaddressregister(left.location.register) then
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,
left.location.register,location.reference.base);
end
else
location.reference.base := left.location.register;
end;
LOC_CREGISTER,
LOC_CREFERENCE,
LOC_REFERENCE:
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,location.reference.base);
end;
end;
{ implicit deferencing }
if (cs_gdb_heaptrc in aktglobalswitches) and
(cs_checkpointer in aktglobalswitches) and
not(cs_compilesystem in aktmoduleswitches) then
begin
cg.a_param_reg(exprasmlist, OS_ADDR,location.reference.base,paramanager.getintparaloc(1));
cg.a_call_name(exprasmlist,'FPC_CHECKPOINTER');
end;
end
else if is_interfacecom(left.resulttype.def) then
begin
tg.GetTemp(exprasmlist,pointer_size,tt_interfacecom,location.reference);
cg.a_load_loc_ref(exprasmlist,left.location,location.reference);
{ implicit deferencing also for interfaces }
if (cs_gdb_heaptrc in aktglobalswitches) and
(cs_checkpointer in aktglobalswitches) and
not(cs_compilesystem in aktmoduleswitches) then
begin
cg.a_param_reg(exprasmlist, OS_ADDR,location.reference.base,paramanager.getintparaloc(1));
cg.a_call_name(exprasmlist,'FPC_CHECKPOINTER');
end;
end
else
location_copy(location,left.location);
inc(location.reference.offset,vs.address);
{ also update the size of the location }
location.size:=def_cgsize(resulttype.def);
end;
{*****************************************************************************
TCGSELFNODE
*****************************************************************************}
procedure tcgselfnode.pass_2;
begin
rg.getexplicitregisterint(exprasmlist,SELF_POINTER_REG);
if (resulttype.def.deftype=classrefdef) or
is_class(resulttype.def) then
begin
location_reset(location,LOC_CREGISTER,OS_ADDR);
location.register:=SELF_POINTER_REG;
end
else
begin
location_reset(location,LOC_CREFERENCE,OS_ADDR);
location.reference.base:=SELF_POINTER_REG;
end;
end;
{*****************************************************************************
TCGWITHNODE
*****************************************************************************}
procedure tcgwithnode.pass_2;
var
tmpreg: tregister;
usetemp,with_expr_in_temp : boolean;
symtable : tsymtable;
i : integer;
{$ifdef GDB}
withstartlabel,withendlabel : tasmlabel;
pp : pchar;
mangled_length : longint;
const
withlevel : longint = 0;
{$endif GDB}
begin
if assigned(left) then
begin
secondpass(left);
{$ifdef i386}
if (left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) and
(left.location.reference.segment<>R_NO) then
message(parser_e_no_with_for_variable_in_other_segments);
{$endif i386}
reference_reset(withreference);
usetemp:=false;
if (left.nodetype=loadn) and
(tloadnode(left).symtable=aktprocdef.localst) then
begin
{ for locals use the local storage }
withreference:=left.location.reference;
include(flags,nf_islocal);
end
else
{ call can have happend with a property }
begin
usetemp:=true;
if is_class_or_interface(left.resulttype.def) then
begin
tmpreg := cg.get_scratch_reg_int(exprasmlist);
cg.a_load_loc_reg(exprasmlist,left.location,tmpreg)
end
else
begin
tmpreg := cg.get_scratch_reg_address(exprasmlist);
cg.a_loadaddr_ref_reg(exprasmlist,
left.location.reference,tmpreg);
end;
end;
location_release(exprasmlist,left.location);
symtable:=withsymtable;
for i:=1 to tablecount do
begin
if (left.nodetype=loadn) and
(tloadnode(left).symtable=aktprocdef.localst) then
twithsymtable(symtable).direct_with:=true;
twithsymtable(symtable).withnode:=self;
symtable:=symtable.next;
end;
{ if the with expression is stored in a temp }
{ area we must make it persistent and shouldn't }
{ release it (FK) }
if (left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) and
tg.istemp(left.location.reference) then
with_expr_in_temp:=tg.ChangeTempType(exprasmlist,left.location.reference,tt_persistant)
else
with_expr_in_temp:=false;
{ if usetemp is set the value must be in tmpreg }
if usetemp then
begin
tg.GetTemp(exprasmlist,pointer_size,tt_persistant,withreference);
{ move to temp reference }
cg.a_load_reg_ref(exprasmlist,OS_ADDR,tmpreg,withreference);
cg.free_scratch_reg(exprasmlist,tmpreg);
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
begin
inc(withlevel);
objectlibrary.getaddrlabel(withstartlabel);
objectlibrary.getaddrlabel(withendlabel);
cg.a_label(exprasmlist,withstartlabel);
withdebugList.concat(Tai_stabs.Create(strpnew(
'"with'+tostr(withlevel)+':'+tostr(symtablestack.getnewtypecount)+
'=*'+tstoreddef(left.resulttype.def).numberstring+'",'+
tostr(N_LSYM)+',0,0,'+tostr(withreference.offset))));
mangled_length:=length(aktprocdef.mangledname);
getmem(pp,mangled_length+50);
strpcopy(pp,'192,0,0,'+withstartlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),aktprocdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
end;
{$endif GDB}
end;
{ right can be optimize out !!! }
if assigned(right) then
secondpass(right);
if usetemp then
begin
tg.UnGetTemp(exprasmlist,withreference);
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
begin
cg.a_label(exprasmlist,withendlabel);
strpcopy(pp,'224,0,0,'+withendlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),aktprocdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
freemem(pp,mangled_length+50);
dec(withlevel);
end;
{$endif GDB}
end;
if with_expr_in_temp then
tg.UnGetTemp(exprasmlist,left.location.reference);
reference_reset(withreference);
end;
end;
{*****************************************************************************
TCGVECNODE
*****************************************************************************}
function tcgvecnode.get_mul_size : longint;
begin
if nf_memindex in flags then
get_mul_size:=1
else
begin
if (left.resulttype.def.deftype=arraydef) then
get_mul_size:=tarraydef(left.resulttype.def).elesize
else
get_mul_size:=resulttype.def.size;
end
end;
procedure tcgvecnode.update_reference_reg_mul(reg:tregister;l:aword);
begin
if location.reference.base=R_NO then
begin
cg.a_op_const_reg(exprasmlist,OP_IMUL,l,reg);
location.reference.base:=reg;
end
else if location.reference.index=R_NO then
begin
cg.a_op_const_reg(exprasmlist,OP_IMUL,l,reg);
location.reference.index:=reg;
end
else
begin
cg.a_loadaddr_ref_reg(exprasmlist,location.reference,location.reference.index);
rg.ungetregisterint(exprasmlist,location.reference.base);
reference_reset_base(location.reference,location.reference.index,0);
{ insert new index register }
cg.a_op_const_reg(exprasmlist,OP_IMUL,l,reg);
location.reference.index:=reg;
end;
end;
procedure tcgvecnode.second_wideansistring;
begin
end;
procedure tcgvecnode.second_dynamicarray;
begin
end;
procedure tcgvecnode.rangecheck_array;
var
freereg : boolean;
hightree : tnode;
poslabel,
neglabel : tasmlabel;
hreg : tregister;
pushed : tpushedsaved;
begin
if is_open_array(left.resulttype.def) or
is_array_of_const(left.resulttype.def) then
begin
{ cdecl functions don't have high() so we can not check the range }
if not(aktprocdef.proccalloption in [pocall_cdecl,pocall_cppdecl]) then
begin
{ Get high value }
hightree:=load_high_value(tvarsym(tloadnode(left).symtableentry));
{ it must be available }
if not assigned(hightree) then
internalerror(200212201);
firstpass(hightree);
secondpass(hightree);
{ generate compares }
freereg:=false;
if (right.location.loc in [LOC_REGISTER,LOC_CREGISTER]) then
hreg:=right.location.register
else
begin
hreg := cg.get_scratch_reg_int(exprasmlist);
freereg:=true;
cg.a_load_loc_reg(exprasmlist,right.location,hreg);
end;
objectlibrary.getlabel(neglabel);
objectlibrary.getlabel(poslabel);
cg.a_cmp_const_reg_label(exprasmlist,OS_INT,OC_LT,0,hreg,poslabel);
cg.a_cmp_loc_reg_label(exprasmlist,OS_INT,OC_BE,hightree.location,hreg,neglabel);
if freereg then
cg.free_scratch_reg(exprasmlist,hreg);
cg.a_label(exprasmlist,poslabel);
cg.a_call_name(exprasmlist,'FPC_RANGEERROR');
cg.a_label(exprasmlist,neglabel);
{ release hightree }
location_release(exprasmlist,hightree.location);
hightree.free;
end;
end
else
if is_dynamic_array(left.resulttype.def) then
begin
rg.saveusedregisters(exprasmlist,pushed,all_registers);
cg.a_param_loc(exprasmlist,right.location,paramanager.getintparaloc(2));
cg.a_param_loc(exprasmlist,left.location,paramanager.getintparaloc(1));
rg.saveregvars(exprasmlist,all_registers);
cg.a_call_name(exprasmlist,'FPC_DYNARRAY_RANGECHECK');
rg.restoreusedregisters(exprasmlist,pushed);
cg.g_maybe_loadself(exprasmlist);
end
else
cg.g_rangecheck(exprasmlist,right,left.resulttype.def);
end;
procedure tcgvecnode.pass_2;
var
extraoffset : longint;
t : tnode;
href : treference;
pushed : tpushedsaved;
isjump : boolean;
otl,ofl : tasmlabel;
newsize : tcgsize;
pushedregs : tmaybesave;
begin
newsize:=def_cgsize(resulttype.def);
location_reset(location,LOC_REFERENCE,newsize);
secondpass(left);
{ we load the array reference to location }
{ an ansistring needs to be dereferenced }
if is_ansistring(left.resulttype.def) or
is_widestring(left.resulttype.def) then
begin
if nf_callunique in flags then
begin
if left.location.loc<>LOC_REFERENCE then
begin
CGMessage(cg_e_illegal_expression);
exit;
end;
rg.saveusedregisters(exprasmlist,pushed,all_registers);
cg.a_paramaddr_ref(exprasmlist,left.location.reference,paramanager.getintparaloc(1));
rg.saveregvars(exprasmlist,all_registers);
cg.a_call_name(exprasmlist,'FPC_'+Upper(tstringdef(left.resulttype.def).stringtypname)+'_UNIQUE');
cg.g_maybe_loadself(exprasmlist);
rg.restoreusedregisters(exprasmlist,pushed);
end;
case left.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
location.reference.base:=left.location.register;
LOC_CREFERENCE,
LOC_REFERENCE :
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getregisterint(exprasmlist);
cg.a_load_ref_reg(exprasmlist,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 aktlocalswitches) then
begin
rg.saveusedregisters(exprasmlist,pushed,all_registers);
cg.a_param_reg(exprasmlist,OS_ADDR,location.reference.base,paramanager.getintparaloc(1));
rg.saveregvars(exprasmlist,all_registers);
cg.a_call_name(exprasmlist,'FPC_'+Upper(tstringdef(left.resulttype.def).stringtypname)+'_CHECKZERO');
cg.g_maybe_loadself(exprasmlist);
rg.restoreusedregisters(exprasmlist,pushed);
end;
{ in ansistrings/widestrings S[1] is p<w>char(S)[0] !! }
if is_ansistring(left.resulttype.def) then
dec(location.reference.offset)
else
dec(location.reference.offset,2);
end
else if is_dynamic_array(left.resulttype.def) then
begin
case left.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
location.reference.base:=left.location.register;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
location_release(exprasmlist,left.location);
location.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_ref_reg(exprasmlist,OS_ADDR,
left.location.reference,location.reference.base);
end;
else
internalerror(2002032219);
end;
end
else
location_copy(location,left.location);
{ offset can only differ from 0 if arraydef }
if (left.resulttype.def.deftype=arraydef) and
not(is_dynamic_array(left.resulttype.def)) then
dec(location.reference.offset,get_mul_size*tarraydef(left.resulttype.def).lowrange);
if right.nodetype=ordconstn then
begin
{ offset can only differ from 0 if arraydef }
case left.resulttype.def.deftype of
arraydef :
begin
if not(is_open_array(left.resulttype.def)) and
not(is_array_of_const(left.resulttype.def)) and
not(is_dynamic_array(left.resulttype.def)) then
begin
if (tordconstnode(right).value>tarraydef(left.resulttype.def).highrange) or
(tordconstnode(right).value<tarraydef(left.resulttype.def).lowrange) then
begin
{ this should be caught in the resulttypepass! (JM) }
if (cs_check_range in aktlocalswitches) 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);
rangecheck_array;
end;
end;
stringdef :
begin
if (cs_check_range in aktlocalswitches) then
begin
case tstringdef(left.resulttype.def).string_typ of
{ it's the same for ansi- and wide strings }
st_widestring,
st_ansistring:
begin
rg.saveusedregisters(exprasmlist,pushed,all_registers);
cg.a_param_const(exprasmlist,OS_INT,tordconstnode(right).value,paramanager.getintparaloc(2));
href:=location.reference;
dec(href.offset,7);
cg.a_param_ref(exprasmlist,OS_INT,href,paramanager.getintparaloc(1));
rg.saveregvars(exprasmlist,all_registers);
cg.a_call_name(exprasmlist,'FPC_'+Upper(tstringdef(left.resulttype.def).stringtypname)+'_RANGECHECK');
rg.restoreusedregisters(exprasmlist,pushed);
cg.g_maybe_loadself(exprasmlist);
end;
st_shortstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
st_longstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
end;
end;
end;
end;
inc(location.reference.offset,
get_mul_size*tordconstnode(right).value);
end
else
{ not nodetype=ordconstn }
begin
if (cs_regalloc in aktglobalswitches) and
{ if we do range checking, we don't }
{ need that fancy code (it would be }
{ buggy) }
not(cs_check_range in aktlocalswitches) and
(left.resulttype.def.deftype=arraydef) 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.registers32 := taddnode(right).registers32;
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.registers32 := right.registers32;
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.registers32 := right.registers32;
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^.registers32 := right.registers32;
putnode(right);
putnode(right.left);
right:=t;
end;}
end;
inc(location.reference.offset,
get_mul_size*extraoffset);
end;
{ calculate from left to right }
if not(location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
{ should be internalerror! (JM) }
CGMessage(cg_e_illegal_expression);
isjump:=(right.location.loc=LOC_JUMP);
if isjump then
begin
otl:=truelabel;
objectlibrary.getlabel(truelabel);
ofl:=falselabel;
objectlibrary.getlabel(falselabel);
end;
maybe_save(exprasmlist,right.registers32,location,pushedregs);
secondpass(right);
maybe_restore(exprasmlist,location,pushedregs);
if cs_check_range in aktlocalswitches then
begin
if left.resulttype.def.deftype=arraydef then
rangecheck_array;
end;
location_force_reg(exprasmlist,right.location,OS_32,false);
if isjump then
begin
truelabel:=otl;
falselabel:=ofl;
end;
{ produce possible range check code: }
if cs_check_range in aktlocalswitches then
begin
if left.resulttype.def.deftype=arraydef then
begin
{ done defore (PM) }
end
else if (left.resulttype.def.deftype=stringdef) then
begin
case tstringdef(left.resulttype.def).string_typ of
{ it's the same for ansi- and wide strings }
st_widestring,
st_ansistring:
begin
rg.saveusedregisters(exprasmlist,pushed,all_registers);
cg.a_param_reg(exprasmlist,OS_INT,right.location.register,paramanager.getintparaloc(1));
href:=location.reference;
dec(href.offset,7);
cg.a_param_ref(exprasmlist,OS_INT,href,paramanager.getintparaloc(1));
rg.saveregvars(exprasmlist,all_registers);
cg.a_call_name(exprasmlist,'FPC_'+Upper(tstringdef(left.resulttype.def).stringtypname)+'_RANGECHECK');
rg.restoreusedregisters(exprasmlist,pushed);
cg.g_maybe_loadself(exprasmlist);
end;
st_shortstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
st_longstring:
begin
{!!!!!!!!!!!!!!!!!}
end;
end;
end;
end;
{ insert the register and the multiplication factor in the
reference }
update_reference_reg_mul(right.location.register,get_mul_size);
end;
location.size:=newsize;
end;
begin
cloadvmtnode:=tcgloadvmtnode;
chnewnode:=tcghnewnode;
chdisposenode:=tcghdisposenode;
caddrnode:=tcgaddrnode;
cdoubleaddrnode:=tcgdoubleaddrnode;
cderefnode:=tcgderefnode;
csubscriptnode:=tcgsubscriptnode;
cselfnode:=tcgselfnode;
cwithnode:=tcgwithnode;
cvecnode:=tcgvecnode;
end.
{
$Log$
Revision 1.39 2002-12-20 18:13:19 peter
* no rangecheck for openarrays with cdecl
Revision 1.38 2002/12/17 22:19:33 peter
* fixed pushing of records>8 bytes with stdcall
* simplified hightree loading
Revision 1.37 2002/12/08 13:39:03 carl
+ some documentation added
Revision 1.36 2002/12/07 14:14:19 carl
* bugfix on invalid typecast
Revision 1.35 2002/11/25 17:43:18 peter
* splitted defbase in defutil,symutil,defcmp
* merged isconvertable and is_equal into compare_defs(_ext)
* made operator search faster by walking the list only once
Revision 1.34 2002/11/24 18:19:20 carl
+ checkpointer for interfaces also
Revision 1.33 2002/11/23 22:50:06 carl
* some small speed optimizations
+ added several new warnings/hints
Revision 1.32 2002/11/15 01:58:51 peter
* merged changes from 1.0.7 up to 04-11
- -V option for generating bug report tracing
- more tracing for option parsing
- errors for cdecl and high()
- win32 import stabs
- win32 records<=8 are returned in eax:edx (turned off by default)
- heaptrc update
- more info for temp management in .s file with EXTDEBUG
Revision 1.31 2002/10/09 20:24:47 florian
+ range checking for dyn. arrays
Revision 1.30 2002/10/07 21:30:45 peter
* rangecheck for open arrays added
Revision 1.29 2002/10/05 12:43:25 carl
* fixes for Delphi 6 compilation
(warning : Some features do not work under Delphi)
Revision 1.28 2002/09/17 18:54:02 jonas
* a_load_reg_reg() now has two size parameters: source and dest. This
allows some optimizations on architectures that don't encode the
register size in the register name.
Revision 1.27 2002/09/07 15:25:03 peter
* old logs removed and tabs fixed
Revision 1.26 2002/09/01 18:46:01 peter
* fixed generic tcgvecnode
* move code that updates a reference with index register and multiplier
to separate method so it can be overriden for scaled indexing
* i386 uses generic tcgvecnode
Revision 1.25 2002/08/23 16:14:48 peter
* tempgen cleanup
* tt_noreuse temp type added that will be used in genentrycode
Revision 1.24 2002/08/15 08:13:54 carl
- a_load_sym_ofs_reg removed
* loadvmt now calls loadaddr_ref_reg instead
Revision 1.23 2002/08/11 14:32:26 peter
* renamed current_library to objectlibrary
Revision 1.22 2002/08/11 13:24:12 peter
* saving of asmsymbols in ppu supported
* asmsymbollist global is removed and moved into a new class
tasmlibrarydata that will hold the info of a .a file which
corresponds with a single module. Added librarydata to tmodule
to keep the library info stored for the module. In the future the
objectfiles will also be stored to the tasmlibrarydata class
* all getlabel/newasmsymbol and friends are moved to the new class
Revision 1.21 2002/08/11 11:36:57 jonas
* always first try to use base and only then index
Revision 1.20 2002/08/11 06:14:40 florian
* fixed powerpc compilation problems
Revision 1.19 2002/08/10 14:46:29 carl
+ moved target_cpu_string to cpuinfo
* renamed asmmode enum.
* assembler reader has now less ifdef's
* move from nppcmem.pas -> ncgmem.pas vec. node.
Revision 1.18 2002/07/28 21:34:31 florian
* more powerpc fixes
+ dummy tcgvecnode
Revision 1.17 2002/07/11 14:41:28 florian
* start of the new generic parameter handling
Revision 1.16 2002/07/07 09:52:32 florian
* powerpc target fixed, very simple units can be compiled
* some basic stuff for better callparanode handling, far from being finished
Revision 1.15 2002/07/01 18:46:23 peter
* internal linker
* reorganized aasm layer
Revision 1.14 2002/07/01 16:23:53 peter
* cg64 patch
* basics for currency
* asnode updates for class and interface (not finished)
Revision 1.13 2002/05/20 13:30:40 carl
* bugfix of hdisponen (base must be set, not index)
* more portability fixes
Revision 1.12 2002/05/18 13:34:09 peter
* readded missing revisions
Revision 1.11 2002/05/16 19:46:37 carl
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
+ try to fix temp allocation (still in ifdef)
+ generic constructor calls
+ start of tassembler / tmodulebase class cleanup
Revision 1.9 2002/05/12 16:53:07 peter
* moved entry and exitcode to ncgutil and cgobj
* foreach gets extra argument for passing local data to the
iterator function
* -CR checks also class typecasts at runtime by changing them
into as
* fixed compiler to cycle with the -CR option
* fixed stabs with elf writer, finally the global variables can
be watched
* removed a lot of routines from cga unit and replaced them by
calls to cgobj
* u32bit-s32bit updates for and,or,xor nodes. When one element is
u32bit then the other is typecasted also to u32bit without giving
a rangecheck warning/error.
* fixed pascal calling method with reversing also the high tree in
the parast, detected by tcalcst3 test
Revision 1.8 2002/04/20 21:32:23 carl
+ generic FPC_CHECKPOINTER
+ first parameter offset in stack now portable
* rename some constants
+ move some cpu stuff to other units
- remove unused constents
* fix stacksize for some targets
* fix generic size problems which depend now on EXTEND_SIZE constant
Revision 1.7 2002/04/15 18:58:47 carl
+ target_info.size_of_pointer -> pointer_Size
Revision 1.6 2002/04/04 19:05:57 peter
* removed unused units
* use tlocation.size in cg.a_*loc*() routines
}
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