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289c9bd192
fpc/compiler/ncgld.pas
paul 56bf42de57 compiler: implement record methods and class methods: 
- rename tprocdef._class to tprocdef.struct and change the type from tobjectdef to tabstractrecorddef because methods can belong not to classes only now but to records too
  - replace in many places use of current_objectdef to current_structdef with typcast where is needed
  - add an argument to comp_expr, expr, factor, sub_expr to notify that we are searching type only symbol to solve the problem with records,objects,classes which contains fields with the same name as previosly declared type (like:
  HWND = type Handle;
  rec = record 
    hWnd: HWND;
  end;)
  - disable check in factor_read_id which was made for object that only static fields can be accessed as TObjectType.FieldName outside the object because it makes SizeOf(TObjectType.FieldName) imposible and since the same method was extended to handle records it also breaks a52 package compilation
  - rename tcallcandidates.collect_overloads_in_class to tcallcandidates.collect_overloads_in_struct and addapt the code to handle overloads in records too
  - fix searchsym_type to search also in object ancestors if we found an object symtable
  - add pd_record, pd_notrecord flags to mark procedure modifies which can or can't be used with records. Disallow the next modifiers for records: abstract, dynamic, export, external, far, far16, final, forward, internconst, internproc, interrupt, message, near, override, public, reintroduce, virtual, weakexternal,
Allow the next modifiers for records: static

git-svn-id: branches/paul/extended_records@16526 -
2010-12-09 02:24:46 +00:00

1248 lines
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{
Copyright (c) 1998-2002 by Florian Klaempfl
Generate assembler for nodes that handle loads and assignments 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 ncgld;
{$i fpcdefs.inc}
interface
uses
node,nld,cgutils;
type
tcgloadnode = class(tloadnode)
procedure pass_generate_code;override;
procedure generate_picvaraccess;virtual;
procedure changereflocation(const ref: treference);
end;
tcgassignmentnode = class(tassignmentnode)
procedure pass_generate_code;override;
end;
tcgarrayconstructornode = class(tarrayconstructornode)
procedure pass_generate_code;override;
end;
tcgrttinode = class(trttinode)
procedure pass_generate_code;override;
end;
implementation
uses
cutils,
systems,
verbose,globtype,globals,constexp,
nutils,
symtable,symconst,symtype,symdef,symsym,defutil,paramgr,
ncnv,ncon,nmem,nbas,ncgrtti,
aasmbase,aasmtai,aasmdata,aasmcpu,
cgbase,pass_2,
procinfo,
cpubase,parabase,
tgobj,ncgutil,
cgobj,
ncgbas,ncgflw,
wpobase;
{*****************************************************************************
SSA (for memory temps) support
*****************************************************************************}
type
preplacerefrec = ^treplacerefrec;
treplacerefrec = record
old, new: preference;
ressym: tsym;
end;
function doreplaceref(var n: tnode; para: pointer): foreachnoderesult;
var
rr: preplacerefrec absolute para;
begin
result := fen_false;
case n.nodetype of
loadn:
begin
{ regular variable }
if (tabstractvarsym(tloadnode(n).symtableentry).varoptions * [vo_is_dll_var, vo_is_thread_var] = []) and
not assigned(tloadnode(n).left) and
{ not function result, or no exit in function }
(((tloadnode(n).symtableentry <> rr^.ressym) and
not(vo_is_funcret in tabstractvarsym(tloadnode(n).symtableentry).varoptions)) or
not(fc_exit in flowcontrol)) and
{ stored in memory... }
(tabstractnormalvarsym(tloadnode(n).symtableentry).localloc.loc in [LOC_REFERENCE]) and
{ ... at the place we are looking for }
references_equal(tabstractnormalvarsym(tloadnode(n).symtableentry).localloc.reference,rr^.old^) and
{ its address cannot have escaped the current routine }
not(tabstractvarsym(tloadnode(n).symtableentry).addr_taken) then
begin
{ relocate variable }
tcgloadnode(n).changereflocation(rr^.new^);
result := fen_norecurse_true;
end;
end;
temprefn:
begin
if (ti_valid in ttemprefnode(n).tempinfo^.flags) and
{ memory temp... }
(ttemprefnode(n).tempinfo^.location.loc in [LOC_REFERENCE]) and
{ ... at the place we are looking for }
references_equal(ttemprefnode(n).tempinfo^.location.reference,rr^.old^) and
{ its address cannot have escaped the current routine }
not(ti_addr_taken in ttemprefnode(n).tempinfo^.flags) then
begin
{ relocate the temp }
tcgtemprefnode(n).changelocation(rr^.new^);
result := fen_norecurse_true;
end;
end;
{ Subscriptn must be rejected, otherwise we may replace an
an entire record with a temp for its first field, mantis #13948)
Exception: the field's size is the same as the entire record
The same goes for array indexing
}
subscriptn,
vecn:
if not(tunarynode(n).left.resultdef.typ in [recorddef,objectdef,arraydef,stringdef]) or
{ make sure we don't try to call resultdef.size for types that
don't have a compile-time size such as open arrays }
is_special_array(tunarynode(n).left.resultdef) or
(tsubscriptnode(n).left.resultdef.size <> tunarynode(n).resultdef.size) then
result := fen_norecurse_false;
{ optimize the searching a bit }
derefn,addrn,
calln,inlinen,casen,
addn,subn,muln,
andn,orn,xorn,
ltn,lten,gtn,gten,equaln,unequaln,
slashn,divn,shrn,shln,notn,
inn,
asn,isn:
result := fen_norecurse_false;
end;
end;
function maybechangetemp(list: TAsmList; var n: tnode; const newref: treference): boolean;
var
rr: treplacerefrec;
begin
result := false;
{ only do for -O2 or higher (breaks debugging since }
{ variables move to different memory locations) }
if not(cs_opt_level2 in current_settings.optimizerswitches) or
{ must be a copy to a memory location ... }
(n.location.loc <> LOC_REFERENCE) or
{ not inside a control flow statement and no goto's in sight }
([fc_inflowcontrol,fc_gotolabel] * flowcontrol <> []) or
{ not for refcounted types, because those locations are }
{ still used later on in initialisation/finalisation code }
is_managed_type(n.resultdef) or
{ source and destination are temps (= not global variables) }
not tg.istemp(n.location.reference) or
not tg.istemp(newref) or
{ and both point to the start of a temp, and the source is a }
{ non-persistent temp (otherwise we need some kind of copy- }
{ on-write support in case later on both are still used) }
(tg.gettypeoftemp(newref) <> tt_normal) or
not (tg.gettypeoftemp(n.location.reference) in [tt_normal,tt_persistent]) or
{ and both have the same size }
(tg.sizeoftemp(current_asmdata.CurrAsmList,newref) <> tg.sizeoftemp(current_asmdata.CurrAsmList,n.location.reference)) then
exit;
{ find the source of the old reference (loadnode or tempnode) }
{ and replace it with the new reference }
rr.old := @n.location.reference;
rr.new := @newref;
rr.ressym := nil;
if assigned(current_procinfo.procdef.funcretsym) and
(tabstractvarsym(current_procinfo.procdef.funcretsym).refs <> 0) then
if (current_procinfo.procdef.proctypeoption=potype_constructor) then
rr.ressym:=tsym(current_procinfo.procdef.parast.Find('self'))
else
rr.ressym:=current_procinfo.procdef.funcretsym;
{ if source not found, don't do anything }
if not foreachnodestatic(n,@doreplaceref,@rr) then
exit;
n.location.reference := newref;
result:=true;
end;
{*****************************************************************************
SecondLoad
*****************************************************************************}
procedure tcgloadnode.generate_picvaraccess;
begin
{$ifndef sparc}
location.reference.base:=current_procinfo.got;
location.reference.symbol:=current_asmdata.RefAsmSymbol(tstaticvarsym(symtableentry).mangledname+'@GOT');
{$endif sparc}
end;
procedure tcgloadnode.changereflocation(const ref: treference);
var
oldtemptype: ttemptype;
begin
if (location.loc<>LOC_REFERENCE) then
internalerror(2007020812);
if not tg.istemp(location.reference) then
internalerror(2007020813);
oldtemptype:=tg.gettypeoftemp(location.reference);
if (oldtemptype = tt_persistent) then
tg.ChangeTempType(current_asmdata.CurrAsmList,location.reference,tt_normal);
tg.ungettemp(current_asmdata.CurrAsmList,location.reference);
location.reference:=ref;
tg.ChangeTempType(current_asmdata.CurrAsmList,location.reference,oldtemptype);
tabstractnormalvarsym(symtableentry).localloc:=location;
end;
procedure tcgloadnode.pass_generate_code;
var
hregister : tregister;
vs : tabstractnormalvarsym;
gvs : tstaticvarsym;
pd : tprocdef;
href : treference;
newsize : tcgsize;
endrelocatelab,
norelocatelab : tasmlabel;
paraloc1 : tcgpara;
begin
{ we don't know the size of all arrays }
newsize:=def_cgsize(resultdef);
{ alignment is overridden per case below }
location_reset_ref(location,LOC_REFERENCE,newsize,resultdef.alignment);
case symtableentry.typ of
absolutevarsym :
begin
{ this is only for toasm and toaddr }
case tabsolutevarsym(symtableentry).abstyp of
toaddr :
begin
{$ifdef i386}
if tabsolutevarsym(symtableentry).absseg then
location.reference.segment:=NR_FS;
{$endif i386}
location.reference.offset:=aint(tabsolutevarsym(symtableentry).addroffset);
end;
toasm :
location.reference.symbol:=current_asmdata.RefAsmSymbol(tabsolutevarsym(symtableentry).mangledname);
else
internalerror(200310283);
end;
end;
constsym:
begin
if tconstsym(symtableentry).consttyp=constresourcestring then
begin
location_reset_ref(location,LOC_CREFERENCE,OS_ADDR,sizeof(pint));
location.reference.symbol:=current_asmdata.RefAsmSymbol(make_mangledname('RESSTR',symtableentry.owner,symtableentry.name));
{ Resourcestring layout:
TResourceStringRecord = Packed Record
Name,
CurrentValue,
DefaultValue : AnsiString;
HashValue : LongWord;
end;
}
location.reference.offset:=sizeof(pint);
end
else
internalerror(22798);
end;
staticvarsym :
begin
gvs:=tstaticvarsym(symtableentry);
if ([vo_is_dll_var,vo_is_external] * gvs.varoptions <> []) then
begin
{ assume external variables use the default alignment }
location.reference.alignment:=gvs.vardef.alignment;
location.reference.base := cg.g_indirect_sym_load(current_asmdata.CurrAsmList,tstaticvarsym(symtableentry).mangledname,
vo_is_weak_external in gvs.varoptions);
if (location.reference.base <> NR_NO) then
exit;
end
else
begin
location.reference.alignment:=var_align(gvs.vardef.alignment);
end;
if (vo_is_dll_var in gvs.varoptions) then
{ DLL variable }
begin
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
if not(vo_is_weak_external in gvs.varoptions) then
location.reference.symbol:=current_asmdata.RefAsmSymbol(tstaticvarsym(symtableentry).mangledname)
else
location.reference.symbol:=current_asmdata.WeakRefAsmSymbol(tstaticvarsym(symtableentry).mangledname);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,location.reference,hregister);
reference_reset_base(location.reference,hregister,0,location.reference.alignment);
end
{ Thread variable }
else if (vo_is_thread_var in gvs.varoptions) and
not(tf_section_threadvars in target_info.flags) then
begin
if (tf_section_threadvars in target_info.flags) then
begin
if gvs.localloc.loc=LOC_INVALID then
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(location.reference,current_asmdata.RefAsmSymbol(gvs.mangledname),0,location.reference.alignment)
else
reference_reset_symbol(location.reference,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),0,location.reference.alignment)
else
location:=gvs.localloc;
{$ifdef i386}
case target_info.system of
system_i386_linux:
location.reference.segment:=NR_GS;
system_i386_win32:
location.reference.segment:=NR_FS;
end;
{$endif i386}
end
else
begin
{
Thread var loading is optimized to first check if
a relocate function is available. When the function
is available it is called to retrieve the address.
Otherwise the address is loaded with the symbol
The code needs to be in the order to first handle the
call and then the address load to be sure that the
register that is used for returning is the same (PFV)
}
current_asmdata.getjumplabel(norelocatelab);
current_asmdata.getjumplabel(endrelocatelab);
{ make sure hregister can't allocate the register necessary for the parameter }
paraloc1.init;
paramanager.getintparaloc(pocall_default,1,paraloc1);
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
reference_reset_symbol(href,current_asmdata.RefAsmSymbol('FPC_THREADVAR_RELOCATE'),0,sizeof(pint));
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,hregister);
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_ADDR,OC_EQ,0,hregister,norelocatelab);
{ don't save the allocated register else the result will be destroyed later }
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(gvs.mangledname),0,sizeof(pint))
else
reference_reset_symbol(href,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),0,sizeof(pint));
cg.a_load_ref_cgpara(current_asmdata.CurrAsmList,OS_32,href,paraloc1);
paramanager.freecgpara(current_asmdata.CurrAsmList,paraloc1);
paraloc1.done;
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_reg(current_asmdata.CurrAsmList,hregister);
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
cg.getcpuregister(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_INT,OS_ADDR,NR_FUNCTION_RESULT_REG,hregister);
cg.a_jmp_always(current_asmdata.CurrAsmList,endrelocatelab);
cg.a_label(current_asmdata.CurrAsmList,norelocatelab);
{ no relocation needed, load the address of the variable only, the
layout of a threadvar is (4 bytes pointer):
0 - Threadvar index
4 - Threadvar value in single threading }
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(gvs.mangledname),sizeof(pint),sizeof(pint))
else
reference_reset_symbol(href,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),sizeof(pint),sizeof(pint));
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,hregister);
cg.a_label(current_asmdata.CurrAsmList,endrelocatelab);
location.reference.base:=hregister;
end;
end
{ Normal (or external) variable }
else
begin
if gvs.localloc.loc=LOC_INVALID then
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(location.reference,current_asmdata.RefAsmSymbol(gvs.mangledname),0,location.reference.alignment)
else
reference_reset_symbol(location.reference,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),0,location.reference.alignment)
else
location:=gvs.localloc;
end;
{ make const a LOC_CREFERENCE }
if (gvs.varspez=vs_const) and
(location.loc=LOC_REFERENCE) then
location.loc:=LOC_CREFERENCE;
end;
paravarsym,
localvarsym :
begin
vs:=tabstractnormalvarsym(symtableentry);
{ Nested variable }
if assigned(left) then
begin
secondpass(left);
if not(left.location.loc in [LOC_REGISTER,LOC_CREGISTER]) then
internalerror(200309286);
if vs.localloc.loc<>LOC_REFERENCE then
internalerror(200409241);
reference_reset_base(location.reference,left.location.register,vs.localloc.reference.offset,vs.localloc.reference.alignment);
end
else
location:=vs.localloc;
{ handle call by reference variables when they are not
already copied to local copies. Also ignore the reference
when we need to load the self pointer for objects }
if is_addr_param_load then
begin
if (location.loc in [LOC_CREGISTER,LOC_REGISTER]) then
hregister:=location.register
else
begin
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
{ we need to load only an address }
location.size:=OS_ADDR;
cg.a_load_loc_reg(current_asmdata.CurrAsmList,location.size,location,hregister);
end;
{ assume packed records may always be unaligned }
if not(resultdef.typ in [recorddef,objectdef]) or
(tabstractrecordsymtable(tabstractrecorddef(resultdef).symtable).usefieldalignment<>1) then
location_reset_ref(location,LOC_REFERENCE,newsize,resultdef.alignment)
else
location_reset_ref(location,LOC_REFERENCE,newsize,1);
location.reference.base:=hregister;
end;
{ make const a LOC_CREFERENCE }
if (vs.varspez=vs_const) and
(location.loc=LOC_REFERENCE) then
location.loc:=LOC_CREFERENCE;
end;
procsym:
begin
if not assigned(procdef) then
internalerror(200312011);
if assigned(left) then
begin
{$if sizeof(pint) = 4}
location_reset_ref(location,LOC_CREFERENCE,OS_64,sizeof(pint));
{$else} {$if sizeof(pint) = 8}
location_reset_ref(location,LOC_CREFERENCE,OS_128,sizeof(pint));
{$else}
internalerror(20020520);
{$endif} {$endif}
tg.GetTemp(current_asmdata.CurrAsmList,2*sizeof(pint),sizeof(pint),tt_normal,location.reference);
secondpass(left);
{ load class instance/classrefdef address }
if left.location.loc=LOC_CONSTANT then
location_force_reg(current_asmdata.CurrAsmList,left.location,OS_ADDR,false);
case left.location.loc of
LOC_CREGISTER,
LOC_REGISTER:
begin
{ this is not possible for objects }
if is_object(left.resultdef) then
internalerror(200304234);
hregister:=left.location.register;
end;
LOC_CREFERENCE,
LOC_REFERENCE:
begin
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
if not is_object(left.resultdef) then
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.reference,hregister)
else
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,left.location.reference,hregister);
location_freetemp(current_asmdata.CurrAsmList,left.location);
end;
else
internalerror(200610311);
end;
{ store the class instance or classredef address }
href:=location.reference;
inc(href.offset,sizeof(pint));
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,hregister,href);
{ virtual method ? }
if (po_virtualmethod in procdef.procoptions) and
not(nf_inherited in flags) then
begin
if (not assigned(current_procinfo) or
wpoinfomanager.symbol_live(current_procinfo.procdef.mangledname)) then
tobjectdef(procdef.struct).register_vmt_call(procdef.extnumber);
{$ifdef vtentry}
if not is_interface(procdef.struct) then
begin
inc(current_asmdata.NextVTEntryNr);
current_asmdata.CurrAsmList.Concat(tai_symbol.CreateName('VTREF'+tostr(current_asmdata.NextVTEntryNr)+'_'+procdef._class.vmt_mangledname+'$$'+tostr(vmtoffset div sizeof(pint)),AT_FUNCTION,0));
end;
{$endif vtentry}
{ a classrefdef already points to the VMT }
if (left.resultdef.typ<>classrefdef) then
begin
{ load vmt pointer }
reference_reset_base(href,hregister,tobjectdef(left.resultdef).vmt_offset,sizeof(pint));
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,hregister);
end;
{ load method address }
reference_reset_base(href,hregister,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),sizeof(pint));
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,hregister);
{ ... and store it }
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,hregister,location.reference);
end
else
begin
{ load address of the function }
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(procdef.mangledname),0,sizeof(pint));
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,hregister);
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,hregister,location.reference);
end;
end
else
begin
pd:=tprocdef(tprocsym(symtableentry).ProcdefList[0]);
if (po_external in pd.procoptions) then
location.reference.base :=
cg.g_indirect_sym_load(current_asmdata.CurrAsmList,pd.mangledname,
po_weakexternal in pd.procoptions);
{!!!!! Be aware, work on virtual methods too }
if (location.reference.base = NR_NO) then
if not(po_weakexternal in pd.procoptions) then
location.reference.symbol:=current_asmdata.RefAsmSymbol(procdef.mangledname)
else
location.reference.symbol:=current_asmdata.WeakRefAsmSymbol(procdef.mangledname);
end;
end;
labelsym :
if assigned(tlabelsym(symtableentry).asmblocklabel) then
location.reference.symbol:=tlabelsym(symtableentry).asmblocklabel
else
location.reference.symbol:=tcglabelnode((tlabelsym(symtableentry).code)).getasmlabel;
else internalerror(200510032);
end;
end;
{*****************************************************************************
SecondAssignment
*****************************************************************************}
procedure tcgassignmentnode.pass_generate_code;
var
otlabel,hlabel,oflabel : tasmlabel;
href : treference;
releaseright : boolean;
len : aint;
r : tregister;
oldflowcontrol : tflowcontrol;
begin
location_reset(location,LOC_VOID,OS_NO);
otlabel:=current_procinfo.CurrTrueLabel;
oflabel:=current_procinfo.CurrFalseLabel;
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
{
in most cases we can process first the right node which contains
the most complex code. Exceptions for this are:
- result is in flags, loading left will then destroy the flags
- result is a jump, loading left must be already done before the jump is made
- result need reference count, when left points to a value used in
right then decreasing the refcnt on left can possibly release
the memory before right increased the refcnt, result is that an
empty value is assigned
But not when the result is in the flags, then
loading the left node afterwards can destroy the flags.
}
if not(right.expectloc in [LOC_FLAGS,LOC_JUMP]) and
(is_managed_type(right.resultdef) or
(node_complexity(right)>node_complexity(left))) then
begin
secondpass(right);
{ increment source reference counter, this is
useless for constants }
if is_managed_type(right.resultdef) and
not is_constnode(right) then
begin
location_force_mem(current_asmdata.CurrAsmList,right.location);
location_get_data_ref(current_asmdata.CurrAsmList,right.location,href,false,sizeof(pint));
cg.g_incrrefcount(current_asmdata.CurrAsmList,right.resultdef,href);
end;
if codegenerror then
exit;
{ left can't be never a 64 bit LOC_REGISTER, so the 3. arg }
{ can be false }
secondpass(left);
{ decrement destination reference counter }
if is_managed_type(left.resultdef) then
begin
location_get_data_ref(current_asmdata.CurrAsmList,left.location,href,false,sizeof(pint));
cg.g_decrrefcount(current_asmdata.CurrAsmList,left.resultdef,href);
end;
if codegenerror then
exit;
end
else
begin
{ calculate left sides }
secondpass(left);
{ decrement destination reference counter }
if is_managed_type(left.resultdef) then
begin
location_get_data_ref(current_asmdata.CurrAsmList,left.location,href,false,sizeof(pint));
cg.g_decrrefcount(current_asmdata.CurrAsmList,left.resultdef,href);
end;
if codegenerror then
exit;
{ tell the SSA/SSL code that the left side was handled first so
ni SSL is done
}
oldflowcontrol:=flowcontrol;
include(flowcontrol,fc_lefthandled);
{ left can't be never a 64 bit LOC_REGISTER, so the 3. arg }
{ can be false }
secondpass(right);
flowcontrol:=oldflowcontrol;
{ increment source reference counter, this is
useless for string constants}
if is_managed_type(right.resultdef) and
(right.nodetype<>stringconstn) then
begin
location_force_mem(current_asmdata.CurrAsmList,right.location);
location_get_data_ref(current_asmdata.CurrAsmList,right.location,href,false,sizeof(pint));
cg.g_incrrefcount(current_asmdata.CurrAsmList,right.resultdef,href);
end;
if codegenerror then
exit;
end;
releaseright:=true;
{ shortstring assignments are handled separately }
if is_shortstring(left.resultdef) then
begin
{
we can get here only in the following situations
for the right node:
- empty constant string
- char
}
{ The addn is replaced by a blockn or calln that already returns
a shortstring }
if is_shortstring(right.resultdef) and
(right.nodetype in [blockn,calln]) then
begin
{ nothing to do }
end
{ empty constant string }
else if (right.nodetype=stringconstn) and
(tstringconstnode(right).len=0) then
begin
cg.a_load_const_ref(current_asmdata.CurrAsmList,OS_8,0,left.location.reference);
end
{ char loading }
else if is_char(right.resultdef) then
begin
if right.nodetype=ordconstn then
begin
if (target_info.endian = endian_little) then
cg.a_load_const_ref(current_asmdata.CurrAsmList,OS_16,(tordconstnode(right).value.svalue shl 8) or 1,
setalignment(left.location.reference,1))
else
cg.a_load_const_ref(current_asmdata.CurrAsmList,OS_16,tordconstnode(right).value.svalue or (1 shl 8),
setalignment(left.location.reference,1));
end
else
begin
href:=left.location.reference;
cg.a_load_const_ref(current_asmdata.CurrAsmList,OS_8,1,href);
inc(href.offset,1);
case right.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
begin
r:=cg.makeregsize(current_asmdata.CurrAsmList,right.location.register,OS_8);
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_8,OS_8,r,href);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
cg.a_load_ref_ref(current_asmdata.CurrAsmList,OS_8,OS_8,right.location.reference,href);
else
internalerror(200205111);
end;
end;
end
else
internalerror(2002042410);
end
{ try to reuse memory locations instead of copying }
{ copy to a memory location ... }
else if (right.location.loc = LOC_REFERENCE) and
maybechangetemp(current_asmdata.CurrAsmList,left,right.location.reference) then
begin
{ if it worked, we're done }
end
else
begin
{ SSA support }
maybechangeloadnodereg(current_asmdata.CurrAsmList,left,false);
maybechangeloadnodereg(current_asmdata.CurrAsmList,right,true);
case right.location.loc of
LOC_CONSTANT :
begin
{$ifndef cpu64bitalu}
if (left.location.size in [OS_64,OS_S64]) or (right.location.size in [OS_64,OS_S64]) then
cg64.a_load64_const_loc(current_asmdata.CurrAsmList,right.location.value64,left.location)
else
{$endif not cpu64bitalu}
cg.a_load_const_loc(current_asmdata.CurrAsmList,right.location.value,left.location);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
case left.location.loc of
LOC_REGISTER,
LOC_CREGISTER :
begin
{$ifndef cpu64bitalu}
if left.location.size in [OS_64,OS_S64] then
cg64.a_load64_ref_reg(current_asmdata.CurrAsmList,right.location.reference,left.location.register64)
else
{$endif not cpu64bitalu}
cg.a_load_ref_reg(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.reference,left.location.register);
end;
LOC_FPUREGISTER,
LOC_CFPUREGISTER :
begin
cg.a_loadfpu_ref_reg(current_asmdata.CurrAsmList,
right.location.size,left.location.size,
right.location.reference,
left.location.register);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
if (left.resultdef.typ=floatdef) and
(right.resultdef.typ=floatdef) and
(left.location.size<>right.location.size) then
begin
cg.a_loadfpu_ref_ref(current_asmdata.CurrAsmList,
right.location.size,left.location.size,
right.location.reference,left.location.reference)
end
else
begin
{ TODO: HACK: unaligned test, maybe remove all unaligned locations (array of char) from the compiler}
{ Use unaligned copy when the offset is not aligned }
len:=left.resultdef.size;
if (right.location.reference.offset mod sizeof(aint)<>0) or
(left.location.reference.offset mod sizeof(aint)<>0) or
(right.resultdef.alignment<sizeof(aint)) or
((right.location.reference.alignment<>0) and
(right.location.reference.alignment<sizeof(aint))) or
((left.location.reference.alignment<>0) and
(left.location.reference.alignment<sizeof(aint))) then
cg.g_concatcopy_unaligned(current_asmdata.CurrAsmList,right.location.reference,left.location.reference,len)
else
cg.g_concatcopy(current_asmdata.CurrAsmList,right.location.reference,left.location.reference,len);
end;
end;
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
{$ifdef x86}
if (right.resultdef.typ=floatdef) and
not use_vectorfpu(right.resultdef) then
begin
{ perform size conversion if needed (the mm-code cannot }
{ convert an extended into a double/single, since sse }
{ doesn't support extended) }
r:=cg.getfpuregister(current_asmdata.CurrAsmList,right.location.size);
tg.gettemp(current_asmdata.CurrAsmList,left.resultdef.size,left.resultdef.alignment,tt_normal,href);
cg.a_loadfpu_ref_reg(current_asmdata.CurrAsmList,right.location.size,right.location.size,right.location.reference,r);
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,right.location.size,left.location.size,r,href);
if releaseright then
location_freetemp(current_asmdata.CurrAsmList,right.location);
releaseright:=true;
location_reset_ref(right.location,LOC_REFERENCE,left.location.size,0);
right.location.reference:=href;
end;
{$endif}
cg.a_loadmm_ref_reg(current_asmdata.CurrAsmList,
right.location.size,
left.location.size,
right.location.reference,
left.location.register,mms_movescalar);
end;
LOC_SUBSETREG,
LOC_CSUBSETREG:
cg.a_load_ref_subsetreg(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.reference,left.location.sreg);
LOC_SUBSETREF,
LOC_CSUBSETREF:
{$ifndef cpu64bitalu}
if right.location.size in [OS_64,OS_S64] then
cg64.a_load64_ref_subsetref(current_asmdata.CurrAsmList,right.location.reference,left.location.sref)
else
{$endif not cpu64bitalu}
cg.a_load_ref_subsetref(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.reference,left.location.sref);
else
internalerror(200203284);
end;
end;
{$ifdef SUPPORT_MMX}
LOC_CMMXREGISTER,
LOC_MMXREGISTER:
begin
if left.location.loc=LOC_CMMXREGISTER then
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,OS_M64,OS_M64,right.location.register,left.location.register,nil)
else
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,OS_M64,OS_M64,right.location.register,left.location.reference,nil);
end;
{$endif SUPPORT_MMX}
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
if left.resultdef.typ=arraydef then
begin
end
else
begin
case left.location.loc of
LOC_CMMREGISTER,
LOC_MMREGISTER:
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.register,left.location.register,mms_movescalar);
LOC_REFERENCE,
LOC_CREFERENCE:
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.register,left.location.reference,mms_movescalar);
else
internalerror(2009112601);
end;
end;
end;
LOC_REGISTER,
LOC_CREGISTER :
begin
{$ifndef cpu64bitalu}
{ also OS_F64 in case of mmreg -> intreg }
if left.location.size in [OS_64,OS_S64,OS_F64] then
cg64.a_load64_reg_loc(current_asmdata.CurrAsmList,
right.location.register64,left.location)
else
{$endif not cpu64bitalu}
cg.a_load_reg_loc(current_asmdata.CurrAsmList,right.location.size,right.location.register,left.location);
end;
LOC_FPUREGISTER,
LOC_CFPUREGISTER :
begin
{ we can't do direct moves between fpu and mm registers }
if left.location.loc in [LOC_MMREGISTER,LOC_CMMREGISTER] then
begin
{$ifdef x86}
if not use_vectorfpu(right.resultdef) then
begin
{ perform size conversion if needed (the mm-code cannot convert an }
{ extended into a double/single, since sse doesn't support extended) }
tg.gettemp(current_asmdata.CurrAsmList,left.resultdef.size,left.resultdef.alignment,tt_normal,href);
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,right.location.size,left.location.size,right.location.register,href);
location_reset_ref(right.location,LOC_REFERENCE,left.location.size,0);
right.location.reference:=href;
end;
{$endif}
location_force_mmregscalar(current_asmdata.CurrAsmList,right.location,false);
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,
right.location.size,left.location.size,
right.location.register,left.location.register,mms_movescalar);
end
else
cg.a_loadfpu_reg_loc(current_asmdata.CurrAsmList,
right.location.size,
right.location.register,left.location);
end;
LOC_SUBSETREG,
LOC_CSUBSETREG:
begin
cg.a_load_subsetreg_loc(current_asmdata.CurrAsmList,
right.location.size,right.location.sreg,left.location);
end;
LOC_SUBSETREF,
LOC_CSUBSETREF:
begin
{$ifndef cpu64bitalu}
if right.location.size in [OS_64,OS_S64] then
cg64.a_load64_subsetref_loc(current_asmdata.CurrAsmList,right.location.sref,left.location)
else
{$endif not cpu64bitalu}
cg.a_load_subsetref_loc(current_asmdata.CurrAsmList,
right.location.size,right.location.sref,left.location);
end;
LOC_JUMP :
begin
current_asmdata.getjumplabel(hlabel);
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
if is_pasbool(left.resultdef) then
cg.a_load_const_loc(current_asmdata.CurrAsmList,1,left.location)
else
cg.a_load_const_loc(current_asmdata.CurrAsmList,-1,left.location);
cg.a_jmp_always(current_asmdata.CurrAsmList,hlabel);
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
cg.a_load_const_loc(current_asmdata.CurrAsmList,0,left.location);
cg.a_label(current_asmdata.CurrAsmList,hlabel);
end;
{$ifdef cpuflags}
LOC_FLAGS :
begin
if is_pasbool(left.resultdef) then
begin
case left.location.loc of
LOC_REGISTER,LOC_CREGISTER:
cg.g_flags2reg(current_asmdata.CurrAsmList,left.location.size,right.location.resflags,left.location.register);
LOC_REFERENCE:
cg.g_flags2ref(current_asmdata.CurrAsmList,left.location.size,right.location.resflags,left.location.reference);
LOC_SUBSETREG,LOC_SUBSETREF:
begin
r:=cg.getintregister(current_asmdata.CurrAsmList,left.location.size);
cg.g_flags2reg(current_asmdata.CurrAsmList,left.location.size,right.location.resflags,r);
cg.a_load_reg_loc(current_asmdata.CurrAsmList,left.location.size,r,left.location);
end;
else
internalerror(200203273);
end;
end
else
begin
r:=cg.getintregister(current_asmdata.CurrAsmList,left.location.size);
cg.g_flags2reg(current_asmdata.CurrAsmList,left.location.size,right.location.resflags,r);
cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NEG,left.location.size,r,r);
cg.a_load_reg_loc(current_asmdata.CurrAsmList,left.location.size,r,left.location);
end;
end;
{$endif cpuflags}
end;
end;
if releaseright then
location_freetemp(current_asmdata.CurrAsmList,right.location);
current_procinfo.CurrTrueLabel:=otlabel;
current_procinfo.CurrFalseLabel:=oflabel;
end;
{*****************************************************************************
SecondArrayConstruct
*****************************************************************************}
const
vtInteger = 0;
vtBoolean = 1;
vtChar = 2;
vtExtended = 3;
vtString = 4;
vtPointer = 5;
vtPChar = 6;
vtObject = 7;
vtClass = 8;
vtWideChar = 9;
vtPWideChar = 10;
vtAnsiString32 = 11;
vtCurrency = 12;
vtVariant = 13;
vtInterface = 14;
vtWideString = 15;
vtInt64 = 16;
vtQWord = 17;
vtAnsiString16 = 18;
vtAnsiString64 = 19;
procedure tcgarrayconstructornode.pass_generate_code;
var
hp : tarrayconstructornode;
href : treference;
lt : tdef;
paraloc : tcgparalocation;
otlabel,
oflabel : tasmlabel;
vtype : longint;
elesize,
elealign : longint;
tmpreg : tregister;
vaddr : boolean;
freetemp,
dovariant : boolean;
begin
if is_packed_array(resultdef) then
internalerror(200608042);
dovariant:=(nf_forcevaria in flags) or is_variant_array(resultdef);
if dovariant then
begin
elesize:=sizeof(pint)+sizeof(pint);
elealign:=sizeof(pint);
end
else
begin
elesize:=tarraydef(resultdef).elesize;
elealign:=tarraydef(resultdef).elementdef.alignment;
end;
{ alignment is filled in by tg.gettemp below }
location_reset_ref(location,LOC_CREFERENCE,OS_NO,0);
fillchar(paraloc,sizeof(paraloc),0);
{ Allocate always a temp, also if no elements are required, to
be sure that location is valid (PFV) }
if tarraydef(resultdef).highrange=-1 then
tg.GetTemp(current_asmdata.CurrAsmList,elesize,elealign,tt_normal,location.reference)
else
tg.GetTemp(current_asmdata.CurrAsmList,(tarraydef(resultdef).highrange+1)*elesize,resultdef.alignment,tt_normal,location.reference);
href:=location.reference;
{ Process nodes in array constructor }
hp:=self;
while assigned(hp) do
begin
if assigned(hp.left) then
begin
freetemp:=true;
if (hp.left.expectloc=LOC_JUMP) then
begin
otlabel:=current_procinfo.CurrTrueLabel;
oflabel:=current_procinfo.CurrFalseLabel;
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
end;
secondpass(hp.left);
{ Move flags and jump in register }
if hp.left.location.loc in [LOC_FLAGS,LOC_JUMP] then
location_force_reg(current_asmdata.CurrAsmList,hp.left.location,def_cgsize(hp.left.resultdef),false);
if (hp.left.location.loc=LOC_JUMP) then
begin
if (hp.left.expectloc<>LOC_JUMP) then
internalerror(2007103101);
current_procinfo.CurrTrueLabel:=otlabel;
current_procinfo.CurrFalseLabel:=oflabel;
end;
if dovariant then
begin
{ find the correct vtype value }
vtype:=$ff;
vaddr:=false;
lt:=hp.left.resultdef;
case lt.typ of
enumdef,
orddef :
begin
if is_64bit(lt) then
begin
case torddef(lt).ordtype of
scurrency:
vtype:=vtCurrency;
s64bit:
vtype:=vtInt64;
u64bit:
vtype:=vtQWord;
end;
freetemp:=false;
vaddr:=true;
end
else if (lt.typ=enumdef) or
is_integer(lt) then
vtype:=vtInteger
else
if is_boolean(lt) then
vtype:=vtBoolean
else
if (lt.typ=orddef) then
begin
case torddef(lt).ordtype of
uchar:
vtype:=vtChar;
uwidechar:
vtype:=vtWideChar;
end;
end;
end;
floatdef :
begin
if is_currency(lt) then
vtype:=vtCurrency
else
vtype:=vtExtended;
freetemp:=false;
vaddr:=true;
end;
procvardef,
pointerdef :
begin
if is_pchar(lt) then
vtype:=vtPChar
else if is_pwidechar(lt) then
vtype:=vtPWideChar
else
vtype:=vtPointer;
end;
variantdef :
begin
vtype:=vtVariant;
vaddr:=true;
freetemp:=false;
end;
classrefdef :
vtype:=vtClass;
objectdef :
if is_interface(lt) then
vtype:=vtInterface
{ vtObject really means a class based on TObject }
else if is_class(lt) then
vtype:=vtObject
else
internalerror(200505171);
stringdef :
begin
if is_shortstring(lt) then
begin
vtype:=vtString;
vaddr:=true;
freetemp:=false;
end
else
if is_ansistring(lt) then
begin
vtype:=vtAnsiString;
freetemp:=false;
end
else
if is_widestring(lt) or is_unicodestring(lt) then
begin
vtype:=vtWideString;
freetemp:=false;
end;
end;
end;
if vtype=$ff then
internalerror(14357);
{ write changing field update href to the next element }
inc(href.offset,sizeof(pint));
if vaddr then
begin
location_force_mem(current_asmdata.CurrAsmList,hp.left.location);
tmpreg:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,hp.left.location.reference,tmpreg);
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,tmpreg,href);
end
else
cg.a_load_loc_ref(current_asmdata.CurrAsmList,OS_ADDR,hp.left.location,href);
{ update href to the vtype field and write it }
dec(href.offset,sizeof(pint));
cg.a_load_const_ref(current_asmdata.CurrAsmList, OS_INT,vtype,href);
{ goto next array element }
inc(href.offset,sizeof(pint)*2);
end
else
{ normal array constructor of the same type }
begin
if is_managed_type(resultdef) then
freetemp:=false;
case hp.left.location.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,hp.left.location.size,hp.left.location.size,
hp.left.location.register,href,mms_movescalar);
LOC_FPUREGISTER,
LOC_CFPUREGISTER :
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,hp.left.location.size,hp.left.location.size,hp.left.location.register,href);
LOC_REFERENCE,
LOC_CREFERENCE :
begin
if is_shortstring(hp.left.resultdef) then
cg.g_copyshortstring(current_asmdata.CurrAsmList,hp.left.location.reference,href,
Tstringdef(hp.left.resultdef).len)
else
cg.g_concatcopy(current_asmdata.CurrAsmList,hp.left.location.reference,href,elesize);
end;
else
begin
{$ifndef cpu64bitalu}
if hp.left.location.size in [OS_64,OS_S64] then
cg64.a_load64_loc_ref(current_asmdata.CurrAsmList,hp.left.location,href)
else
{$endif not cpu64bitalu}
cg.a_load_loc_ref(current_asmdata.CurrAsmList,hp.left.location.size,hp.left.location,href);
end;
end;
inc(href.offset,elesize);
end;
if freetemp then
location_freetemp(current_asmdata.CurrAsmList,hp.left.location);
end;
{ load next entry }
hp:=tarrayconstructornode(hp.right);
end;
end;
{*****************************************************************************
SecondRTTI
*****************************************************************************}
procedure tcgrttinode.pass_generate_code;
begin
location_reset_ref(location,LOC_CREFERENCE,OS_NO,sizeof(pint));
case rttidatatype of
rdt_normal:
location.reference.symbol:=RTTIWriter.get_rtti_label(rttidef,rttitype);
rdt_ord2str:
location.reference.symbol:=RTTIWriter.get_rtti_label_ord2str(rttidef,rttitype);
rdt_str2ord:
location.reference.symbol:=RTTIWriter.get_rtti_label_str2ord(rttidef,rttitype);
end;
end;
begin
cloadnode:=tcgloadnode;
cassignmentnode:=tcgassignmentnode;
carrayconstructornode:=tcgarrayconstructornode;
crttinode:=tcgrttinode;
end.
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