mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-05-02 16:34:54 +02:00
40e0b4677a
implemented via classes, all descending from system.FpcBaseRecordType
(records are also considered to be "related" to system.FpcBaseRecordType
on the JVM target)
* several routines are auto-generated for all record-classes: apart
from a default constructor (if there is none), also clone (which
returns a new instance containing a deep copy of the current
instance) and deepCopy (which copies all fields of one instance
into another one)
o added new field "synthetickind" to tprocdef that indicates what
kind of synthetically generated method it is (if any), and
mark such methods also as "synthetic" in the JVM assembler code
o split off the JVM-specific parser code (e.g., to add default
constructors) into pjvm.pas
git-svn-id: branches/jvmbackend@18450 -
143 lines
5.0 KiB
ObjectPascal
143 lines
5.0 KiB
ObjectPascal
{
|
|
Copyright (c) 2011 by Jonas Maebe
|
|
|
|
JVM-specific code for call nodes
|
|
|
|
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 njvmcal;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
symdef,
|
|
ncgcal;
|
|
|
|
type
|
|
|
|
{ tjvmcallnode }
|
|
|
|
tjvmcallnode = class(tcgcallnode)
|
|
protected
|
|
procedure extra_pre_call_code; override;
|
|
procedure set_result_location(realresdef: tstoreddef); override;
|
|
procedure do_release_unused_return_value;override;
|
|
procedure extra_post_call_code; override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
verbose,globtype,
|
|
symconst,symtype,defutil,ncal,
|
|
cgbase,cgutils,tgobj,procinfo,
|
|
cpubase,aasmdata,aasmcpu,
|
|
hlcgobj,hlcgcpu,
|
|
jvmdef;
|
|
|
|
|
|
{*****************************************************************************
|
|
TJVMCALLNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tjvmcallnode.extra_pre_call_code;
|
|
begin
|
|
{ when calling a constructor, first create a new instance, except
|
|
when calling it from another constructor (because then this has
|
|
already been done before calling the current constructor) }
|
|
if procdefinition.typ<>procdef then
|
|
exit;
|
|
if tprocdef(procdefinition).proctypeoption<>potype_constructor then
|
|
exit;
|
|
if not(methodpointer.resultdef.typ in [classrefdef,recorddef]) then
|
|
exit;
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_sym(a_new,current_asmdata.RefAsmSymbol(tabstractrecorddef(tprocdef(procdefinition).owner.defowner).jvm_full_typename(true))));
|
|
{ the constructor doesn't return anything, so put a duplicate of the
|
|
self pointer on the evaluation stack for use as function result
|
|
after the constructor has run }
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_none(a_dup));
|
|
thlcgjvm(hlcg).incstack(current_asmdata.CurrAsmList,2);
|
|
end;
|
|
|
|
|
|
procedure tjvmcallnode.set_result_location(realresdef: tstoreddef);
|
|
begin
|
|
location_reset_ref(location,LOC_REFERENCE,def_cgsize(realresdef),1);
|
|
{ in case of jvmimplicitpointertype(), the function will have allocated
|
|
it already and we don't have to allocate it again here }
|
|
if not jvmimplicitpointertype(realresdef) then
|
|
tg.gethltemp(current_asmdata.CurrAsmList,realresdef,realresdef.size,tt_normal,location.reference)
|
|
else
|
|
tg.gethltemp(current_asmdata.CurrAsmList,java_jlobject,java_jlobject.size,tt_normal,location.reference);
|
|
end;
|
|
|
|
|
|
procedure tjvmcallnode.do_release_unused_return_value;
|
|
begin
|
|
if (tprocdef(procdefinition).proctypeoption=potype_constructor) and
|
|
(current_procinfo.procdef.proctypeoption=potype_constructor) then
|
|
exit;
|
|
case resultdef.size of
|
|
0:
|
|
;
|
|
1..4:
|
|
begin
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_none(a_pop));
|
|
thlcgjvm(hlcg).decstack(current_asmdata.CurrAsmList,1);
|
|
end;
|
|
8:
|
|
begin
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_none(a_pop2));
|
|
thlcgjvm(hlcg).decstack(current_asmdata.CurrAsmList,2);
|
|
end
|
|
else
|
|
internalerror(2011010305);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tjvmcallnode.extra_post_call_code;
|
|
var
|
|
totalremovesize: longint;
|
|
realresdef: tdef;
|
|
begin
|
|
if not assigned(typedef) then
|
|
realresdef:=tstoreddef(resultdef)
|
|
else
|
|
realresdef:=tstoreddef(typedef);
|
|
{ a constructor doesn't actually return a value in the jvm }
|
|
if (tprocdef(procdefinition).proctypeoption=potype_constructor) then
|
|
totalremovesize:=pushedparasize
|
|
else
|
|
{ even a byte takes up a full stackslot -> align size to multiple of 4 }
|
|
totalremovesize:=pushedparasize-(align(realresdef.size,4) shr 2);
|
|
{ remove parameters from internal evaluation stack counter (in case of
|
|
e.g. no parameters and a result, it can also increase) }
|
|
if totalremovesize>0 then
|
|
thlcgjvm(hlcg).decstack(current_asmdata.CurrAsmList,totalremovesize)
|
|
else if totalremovesize<0 then
|
|
thlcgjvm(hlcg).incstack(current_asmdata.CurrAsmList,-totalremovesize);
|
|
end;
|
|
|
|
|
|
begin
|
|
ccallnode:=tjvmcallnode;
|
|
end.
|