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{
Copyright (c) 2012 by Jonas Maebe
Generate LLVM bytecode for nodes that handle loads and assignments
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 nllvmld;
{$i fpcdefs.inc}
interface
uses
globtype,
cgutils,
symtype,
node,ncgld,ncgnstld;
type
tllvmloadnode = class(tcgnestloadnode)
function pass_1: tnode; override;
procedure pass_generate_code; override;
end;
{ tllvmarrayconstructornode }
tllvmarrayconstructornode = class(tcgarrayconstructornode)
protected
procedure makearrayref(var ref: treference; eledef: tdef); override;
end;
implementation
uses
systems,
aasmbase,aasmdata,aasmllvm,
nld,
symtable,symconst,symdef,symsym,defutil,
procinfo,tgobj,
llvmbase,cgbase,hlcgobj;
function tllvmloadnode.pass_1: tnode;
begin
result:=inherited;
if assigned(result) then
exit;
case symtableentry.typ of
procsym:
begin
if assigned(left) then
expectloc:=LOC_REFERENCE;
end;
end;
end;
procedure tllvmloadnode.pass_generate_code;
var
pvdef: tprocvardef;
href, mpref: treference;
field: tfieldvarsym;
procreg, selfreg: tregister;
selfdef: tdef;
ai: taillvm;
begin
inherited;
case symtableentry.typ of
procsym:
begin
{ if the result is returned in two registers, force it to memory into
a single memory location, as we don't use the registerhi/register
location hack for llvm (llvm will put it back into registers itself)
}
if assigned(left) and
(resultdef.typ in [symconst.procdef,procvardef]) and
not tabstractprocdef(resultdef).is_addressonly then
begin
pvdef:=tprocvardef(procdef.getcopyas(procvardef,pc_normal,''));
{ on little endian, location.register contains proc and
location.registerhi contains self; on big endian, it's the
other way around }
tg.gethltemp(current_asmdata.CurrAsmList,pvdef,pvdef.size,tt_normal,href);
if target_info.endian=endian_little then
begin
procreg:=location.register;
selfreg:=location.registerhi
end
else
begin
procreg:=location.registerhi;
selfreg:=location.register
end;
{ left can be a pointerdef when we take the address of a nested
procedure, as left will then be a pointer to the nestedfpstruct
}
if is_implicit_pointer_object_type(left.resultdef) or
(left.resultdef.typ in [classrefdef,pointerdef]) then
selfdef:=left.resultdef
else
selfdef:=cpointerdef.getreusable(left.resultdef);
mpref:=href;
hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,cpointerdef.getreusable(pvdef),cpointerdef.getreusable(methodpointertype),mpref);
hlcg.g_load_reg_field_by_name(current_asmdata.CurrAsmList,cprocvardef.getreusableprocaddr(procdef),trecorddef(methodpointertype),procreg,'proc',mpref);
hlcg.g_load_reg_field_by_name(current_asmdata.CurrAsmList,selfdef,trecorddef(methodpointertype),selfreg,'self',mpref);
location_reset_ref(location,LOC_REFERENCE,location.size,href.alignment,href.volatility);
location.reference:=href;
end;
end;
labelsym:
begin
selfreg:=hlcg.getaddressregister(current_asmdata.CurrAsmList,voidcodepointertype);
ai:=taillvm.blockaddress(voidcodepointertype,
current_asmdata.RefAsmSymbol(current_procinfo.procdef.mangledname,AT_FUNCTION),
location.reference.symbol
);
current_asmdata.CurrAsmList.concat(
taillvm.op_reg_tai_size(la_bitcast,selfreg,ai,voidcodepointertype)
);
reference_reset_base(location.reference,selfreg,0,ctempposinvalid,location.reference.alignment,location.reference.volatility);
end;
end;
end;
{ tllvmarrayconstructornode }
procedure tllvmarrayconstructornode.makearrayref(var ref: treference; eledef: tdef);
begin
{ the array elements are addressed as pointer to the individual elements ->
convert }
hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef),cpointerdef.getreusable(eledef),ref);
end;
begin
cloadnode:=tllvmloadnode;
carrayconstructornode:=tllvmarrayconstructornode;
end.
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