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fpc/compiler/ncgcal.pas

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Generate assembler 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 ncgcal;
{$i fpcdefs.inc}
interface
uses
cpubase,
globtype,
parabase,
symdef,node,ncal;
type
tcgcallparanode = class(tcallparanode)
private
tempcgpara : tcgpara;
procedure push_addr_para;
procedure push_value_para;
public
constructor create(expr,next : tnode);override;
destructor destroy;override;
procedure secondcallparan;override;
end;
tcgcallnode = class(tcallnode)
private
procedure release_para_temps;
procedure normal_pass_2;
procedure inlined_pass_2;
procedure pushparas;
procedure freeparas;
protected
framepointer_paraloc : tcgpara;
refcountedtemp : treference;
procedure handle_return_value;
{# This routine is used to push the current frame pointer
on the stack. This is used in nested routines where the
value of the frame pointer is always pushed as an extra
parameter.
The default handling is the standard handling used on
most stack based machines, where the frame pointer is
the first invisible parameter.
}
procedure pop_parasize(pop_size:longint);virtual;
procedure extra_interrupt_code;virtual;
procedure extra_call_code;virtual;
procedure do_syscall;virtual;abstract;
public
procedure pass_2;override;
end;
implementation
uses
systems,
cutils,verbose,globals,
symconst,symsym,symtable,defutil,paramgr,
{$ifdef GDB}
strings,
gdb,
{$endif GDB}
cgbase,pass_2,
aasmbase,aasmtai,
nbas,nmem,nld,ncnv,nutils,
{$ifdef x86}
cga,cgx86,
{$endif x86}
ncgutil,
cgutils,cgobj,tgobj,
procinfo;
{*****************************************************************************
TCGCALLPARANODE
*****************************************************************************}
constructor tcgcallparanode.create(expr,next : tnode);
begin
inherited create(expr,next);
tempcgpara.init;
end;
destructor tcgcallparanode.destroy;
begin
tempcgpara.done;
inherited destroy;
end;
procedure tcgcallparanode.push_addr_para;
begin
if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
internalerror(200304235);
cg.a_paramaddr_ref(exprasmlist,left.location.reference,tempcgpara);
end;
procedure tcgcallparanode.push_value_para;
{$ifdef i386}
var
cgsize : tcgsize;
href : treference;
size : longint;
{$endif i386}
begin
{ we've nothing to push when the size of the parameter is 0 }
if left.resulttype.def.size=0 then
exit;
{ Move flags and jump in register to make it less complex }
if left.location.loc in [LOC_FLAGS,LOC_JUMP] then
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),false);
{ Handle Floating point types differently }
if left.resulttype.def.deftype=floatdef then
begin
{$ifdef i386}
if tempcgpara.location^.loc<>LOC_REFERENCE then
internalerror(200309291);
case left.location.loc of
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
begin
size:=align(TCGSize2Size[left.location.size],tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
cg.g_stackpointer_alloc(exprasmlist,size);
reference_reset_base(href,NR_STACK_POINTER_REG,0);
end
else
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.a_loadfpu_reg_ref(exprasmlist,left.location.size,left.location.register,href);
end;
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
size:=align(tfloatdef(left.resulttype.def).size,tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
cg.g_stackpointer_alloc(exprasmlist,size);
reference_reset_base(href,NR_STACK_POINTER_REG,0);
end
else
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.a_loadmm_reg_ref(exprasmlist,left.location.size,left.location.size,left.location.register,href,mms_movescalar);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
size:=align(left.resulttype.def.size,tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
href:=left.location.reference;
inc(href.offset,size);
while (size>0) do
begin
if (size>=4) or (tempcgpara.alignment>=4) then
begin
cgsize:=OS_32;
dec(href.offset,4);
dec(size,4);
end
else
begin
cgsize:=OS_16;
dec(href.offset,2);
dec(size,2);
end;
cg.a_param_ref(exprasmlist,cgsize,href,tempcgpara);
end;
end
else
begin
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.g_concatcopy(exprasmlist,left.location.reference,href,size);
end;
end;
else
internalerror(2002042430);
end;
{$else i386}
case left.location.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
case tempcgpara.location^.loc of
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_MMREGISTER,
LOC_CMMREGISTER:
cg.a_parammm_reg(exprasmlist,left.location.size,left.location.register,tempcgpara,mms_movescalar);
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
begin
location_force_fpureg(exprasmlist,left.location,false);
cg.a_paramfpu_reg(exprasmlist,left.location.size,left.location.register,tempcgpara);
end;
else
internalerror(2002042433);
end;
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
case tempcgpara.location^.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
location_force_mmregscalar(exprasmlist,left.location,false);
cg.a_parammm_reg(exprasmlist,left.location.size,left.location.register,tempcgpara,mms_movescalar);
end;
{$ifdef x86_64}
{ x86_64 pushes s64comp in normal register }
LOC_REGISTER,
LOC_CREGISTER :
begin
location_force_mem(exprasmlist,left.location);
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
cg.a_param_ref(exprasmlist,left.location.size,left.location.reference,tempcgpara);
end;
{$endif x86_64}
{$ifdef sparc}
{ sparc pushes floats in normal registers }
LOC_REGISTER,
LOC_CREGISTER,
{$endif sparc}
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
cg.a_paramfpu_reg(exprasmlist,left.location.size,left.location.register,tempcgpara);
else
internalerror(2002042433);
end;
LOC_REFERENCE,
LOC_CREFERENCE:
case tempcgpara.location^.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
cg.a_parammm_ref(exprasmlist,left.location.size,left.location.reference,tempcgpara,mms_movescalar);
{$ifdef x86_64}
{ x86_64 pushes s64comp in normal register }
LOC_REGISTER,
LOC_CREGISTER :
begin
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
cg.a_param_ref(exprasmlist,left.location.size,left.location.reference,tempcgpara);
end;
{$endif x86_64}
{$ifdef sparc}
{ sparc pushes floats in normal registers }
LOC_REGISTER,
LOC_CREGISTER,
{$endif sparc}
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
cg.a_paramfpu_ref(exprasmlist,left.location.size,left.location.reference,tempcgpara);
else
internalerror(2002042431);
end;
else
internalerror(2002042432);
end;
{$endif i386}
end
else
begin
{ copy the value on the stack or use normal parameter push?
Check for varargs first because that has no paraitem }
if not(cpf_varargs_para in callparaflags) and
paramanager.copy_value_on_stack(paraitem.paratyp,left.resulttype.def,
aktcallnode.procdefinition.proccalloption) then
begin
{$ifdef i386}
if tempcgpara.location^.loc<>LOC_REFERENCE then
internalerror(200309292);
if not (left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
internalerror(200204241);
{ push on stack }
size:=align(left.resulttype.def.size,tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
cg.g_stackpointer_alloc(exprasmlist,size);
reference_reset_base(href,NR_STACK_POINTER_REG,0);
end
else
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.g_concatcopy(exprasmlist,left.location.reference,href,size);
{$else i386}
cg.a_param_copy_ref(exprasmlist,left.resulttype.def.size,left.location.reference,tempcgpara);
{$endif i386}
end
else
begin
case left.location.loc of
LOC_CONSTANT,
LOC_REGISTER,
LOC_CREGISTER,
LOC_REFERENCE,
LOC_CREFERENCE :
begin
{$ifndef cpu64bit}
if left.location.size in [OS_64,OS_S64] then
cg64.a_param64_loc(exprasmlist,left.location,tempcgpara)
else
{$endif cpu64bit}
cg.a_param_loc(exprasmlist,left.location,tempcgpara);
end;
{$ifdef SUPPORT_MMX}
LOC_MMXREGISTER,
LOC_CMMXREGISTER:
cg.a_parammm_reg(exprasmlist,left.location.register);
{$endif SUPPORT_MMX}
else
internalerror(200204241);
end;
end;
end;
end;
procedure tcgcallparanode.secondcallparan;
var
otlabel,
oflabel : tasmlabel;
hp : tnode;
begin
if not(assigned(paraitem)) or
not(assigned(paraitem.paratype.def)) or
not(assigned(paraitem.parasym) or
(cpf_varargs_para in callparaflags)) then
internalerror(200304242);
{ Skip nothingn nodes which are used after disabling
a parameter }
if (left.nodetype<>nothingn) then
begin
otlabel:=truelabel;
oflabel:=falselabel;
objectlibrary.getlabel(truelabel);
objectlibrary.getlabel(falselabel);
secondpass(left);
if not(assigned(aktcallnode.inlinecode)) then
paramanager.createtempparaloc(exprasmlist,aktcallnode.procdefinition.proccalloption,paraitem,tempcgpara)
else
paramanager.duplicateparaloc(exprasmlist,aktcallnode.procdefinition.proccalloption,paraitem,tempcgpara);
{ handle varargs first, because paraitem.parasym is not valid }
if (cpf_varargs_para in callparaflags) then
begin
if paramanager.push_addr_param(vs_value,left.resulttype.def,
aktcallnode.procdefinition.proccalloption) then
push_addr_para
else
push_value_para;
end
{ hidden parameters }
else if paraitem.is_hidden then
begin
{ don't push a node that already generated a pointer type
by address for implicit hidden parameters }
if (vo_is_funcret in tvarsym(paraitem.parasym).varoptions) or
(not(left.resulttype.def.deftype in [pointerdef,classrefdef]) and
paramanager.push_addr_param(paraitem.paratyp,paraitem.paratype.def,
aktcallnode.procdefinition.proccalloption)) then
push_addr_para
else
push_value_para;
end
{ formal def }
else if (paraitem.paratype.def.deftype=formaldef) then
begin
{ allow passing of a constant to a const formaldef }
if (tvarsym(paraitem.parasym).varspez=vs_const) and
(left.location.loc=LOC_CONSTANT) then
location_force_mem(exprasmlist,left.location);
{ allow (typecasted) @var }
hp:=left;
while (hp.nodetype=typeconvn) do
hp:=ttypeconvnode(hp).left;
if (hp.nodetype=addrn) and
(not(nf_procvarload in hp.flags)) then
cg.a_param_loc(exprasmlist,left.location,tempcgpara)
else
push_addr_para;
end
{ Normal parameter }
else
begin
{ don't push a node that already generated a pointer type
by address for implicit hidden parameters }
if (not(
paraitem.is_hidden and
(left.resulttype.def.deftype in [pointerdef,classrefdef])
) and
paramanager.push_addr_param(paraitem.paratyp,paraitem.paratype.def,
aktcallnode.procdefinition.proccalloption)) then
begin
{ Passing a var parameter to a var parameter, we can
just push the address transparently }
if (left.nodetype=loadn) and
(tloadnode(left).is_addr_param_load) then
begin
if (left.location.reference.index<>NR_NO) or
(left.location.reference.offset<>0) then
internalerror(200410107);
cg.a_param_reg(exprasmlist,OS_ADDR,left.location.reference.base,tempcgpara)
end
else
begin
{ Check for passing a constant to var,out parameter }
if (paraitem.paratyp in [vs_var,vs_out]) and
(left.location.loc<>LOC_REFERENCE) then
begin
{ passing self to a var parameter is allowed in
TP and delphi }
if not((left.location.loc=LOC_CREFERENCE) and
is_self_node(left)) then
internalerror(200106041);
end;
{ Force to be in memory }
if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
location_force_mem(exprasmlist,left.location);
push_addr_para;
end;
end
else
push_value_para;
end;
truelabel:=otlabel;
falselabel:=oflabel;
{ update return location in callnode when this is the function
result }
if assigned(paraitem.parasym) and
(vo_is_funcret in tvarsym(paraitem.parasym).varoptions) then
location_copy(aktcallnode.location,left.location);
end;
{ next parameter }
if assigned(right) then
tcallparanode(right).secondcallparan;
end;
{*****************************************************************************
TCGCALLNODE
*****************************************************************************}
procedure tcgcallnode.extra_interrupt_code;
begin
end;
procedure tcgcallnode.extra_call_code;
begin
end;
procedure tcgcallnode.pop_parasize(pop_size:longint);
begin
end;
procedure tcgcallnode.handle_return_value;
var
cgsize : tcgsize;
retloc : tlocation;
hregister : tregister;
tempnode : tnode;
resultparaloc : pcgparalocation;
begin
resultparaloc:=procdefinition.funcret_paraloc[callerside].location;
cgsize:=procdefinition.funcret_paraloc[callerside].size;
{ structured results are easy to handle....
needed also when result_no_used !! }
if (procdefinition.proctypeoption<>potype_constructor) and
paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) then
begin
{ Location should be setup by the funcret para }
if location.loc<>LOC_REFERENCE then
internalerror(200304241);
end
else
{ ansi/widestrings must be registered, so we can dispose them }
if resulttype.def.needs_inittable then
begin
if resultparaloc^.loc<>LOC_REGISTER then
internalerror(200409261);
{ the FUNCTION_RESULT_REG is already allocated }
if getsupreg(resultparaloc^.register)<first_mm_imreg then
cg.ungetcpuregister(exprasmlist,resultparaloc^.register);
if not assigned(funcretnode) then
begin
location_reset(location,LOC_REFERENCE,OS_ADDR);
location.reference:=refcountedtemp;
cg.a_load_reg_ref(exprasmlist,OS_ADDR,OS_ADDR,NR_FUNCTION_RESULT_REG,location.reference);
end
else
begin
hregister := cg.getaddressregister(exprasmlist);
cg.a_load_reg_reg(exprasmlist,OS_ADDR,OS_ADDR,resultparaloc^.register,hregister);
{ in case of a regular funcretnode with ret_in_param, the }
{ original funcretnode isn't touched -> make sure it's }
{ the same here (not sure if it's necessary) }
tempnode := funcretnode.getcopy;
tempnode.pass_2;
location := tempnode.location;
tempnode.free;
cg.g_decrrefcount(exprasmlist,resulttype.def,location.reference);
cg.a_load_reg_ref(exprasmlist,OS_ADDR,OS_ADDR,hregister,location.reference);
end;
end
else
{ normal (ordinal,float,pointer) result value }
begin
{ we have only to handle the result if it is used }
if (cnf_return_value_used in callnodeflags) then
begin
location.loc:=resultparaloc^.loc;
case resultparaloc^.loc of
LOC_FPUREGISTER:
begin
location_reset(location,LOC_FPUREGISTER,cgsize);
location.register:=resultparaloc^.register;
{$ifdef x86}
tcgx86(cg).inc_fpu_stack;
{$else x86}
if getsupreg(resultparaloc^.register)<first_fpu_imreg then
cg.ungetcpuregister(exprasmlist,resultparaloc^.register);
hregister:=cg.getfpuregister(exprasmlist,location.size);
cg.a_loadfpu_reg_reg(exprasmlist,location.size,location.register,hregister);
location.register:=hregister;
{$endif x86}
end;
LOC_REGISTER:
begin
if cgsize<>OS_NO then
begin
location_reset(location,LOC_REGISTER,cgsize);
{$ifndef cpu64bit}
if cgsize in [OS_64,OS_S64] then
begin
procdefinition.funcret_paraloc[callerside].get_location(retloc);
if retloc.loc<>LOC_REGISTER then
internalerror(200409141);
{ the function result registers are already allocated }
if getsupreg(retloc.registerlow)<first_int_imreg then
cg.ungetcpuregister(exprasmlist,retloc.registerlow);
location.registerlow:=cg.getintregister(exprasmlist,OS_32);
cg.a_load_reg_reg(exprasmlist,OS_32,OS_32,retloc.registerlow,location.registerlow);
if getsupreg(retloc.registerhigh)<first_int_imreg then
cg.ungetcpuregister(exprasmlist,retloc.registerhigh);
location.registerhigh:=cg.getintregister(exprasmlist,OS_32);
cg.a_load_reg_reg(exprasmlist,OS_32,OS_32,retloc.registerhigh,location.registerhigh);
end
else
{$endif cpu64bit}
begin
{ change register size after the unget because the
getregister was done for the full register
def_cgsize(resulttype.def) is used here because
it could be a constructor call }
if getsupreg(resultparaloc^.register)<first_int_imreg then
cg.ungetcpuregister(exprasmlist,resultparaloc^.register);
location.register:=cg.getintregister(exprasmlist,def_cgsize(resulttype.def));
cg.a_load_reg_reg(exprasmlist,cgsize,def_cgsize(resulttype.def),resultparaloc^.register,location.register);
end;
end
else
begin
if resulttype.def.size>0 then
internalerror(200305131);
end;
end;
LOC_MMREGISTER:
begin
location_reset(location,LOC_MMREGISTER,cgsize);
if getsupreg(resultparaloc^.register)<first_mm_imreg then
cg.ungetcpuregister(exprasmlist,resultparaloc^.register);
location.register:=cg.getmmregister(exprasmlist,cgsize);
cg.a_loadmm_reg_reg(exprasmlist,cgsize,cgsize,resultparaloc^.register,location.register,mms_movescalar);
end;
else
internalerror(200405023);
end;
end
else
begin
{$ifdef x86}
{ release FPU stack }
if resultparaloc^.loc=LOC_FPUREGISTER then
emit_reg(A_FSTP,S_NO,NR_FPU_RESULT_REG);
{$endif x86}
if cgsize<>OS_NO then
paramanager.freeparaloc(exprasmlist,procdefinition.funcret_paraloc[callerside]);
location_reset(location,LOC_VOID,OS_NO);
end;
end;
{ When the result is not used we need to finalize the result and
can release the temp }
if not(cnf_return_value_used in callnodeflags) then
begin
if location.loc=LOC_REFERENCE then
begin
if resulttype.def.needs_inittable then
cg.g_finalize(exprasmlist,resulttype.def,location.reference);
tg.ungetiftemp(exprasmlist,location.reference)
end;
end;
end;
procedure tcgcallnode.release_para_temps;
var
hp : tnode;
ppn : tcallparanode;
begin
{ Release temps from parameters }
ppn:=tcallparanode(left);
while assigned(ppn) do
begin
if assigned(ppn.left) then
begin
{ don't release the funcret temp }
if not(assigned(ppn.paraitem.parasym)) or
not(vo_is_funcret in tvarsym(ppn.paraitem.parasym).varoptions) then
location_freetemp(exprasmlist,ppn.left.location);
{ process also all nodes of an array of const }
if ppn.left.nodetype=arrayconstructorn then
begin
if assigned(tarrayconstructornode(ppn.left).left) then
begin
hp:=ppn.left;
while assigned(hp) do
begin
location_freetemp(exprasmlist,tarrayconstructornode(hp).left.location);
hp:=tarrayconstructornode(hp).right;
end;
end;
end;
end;
ppn:=tcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.pushparas;
var
ppn : tcgcallparanode;
callerparaloc,
tmpparaloc : pcgparalocation;
{$ifdef cputargethasfixedstack}
htempref,
href : treference;
{$endif cputargethasfixedstack}
begin
{ copy all resources to the allocated registers }
ppn:=tcgcallparanode(left);
while assigned(ppn) do
begin
if (ppn.left.nodetype<>nothingn) then
begin
{ better check for the real location of the parameter here, when stack passed parameters
are saved temporary in registers, checking for the tmpparaloc.loc is wrong
}
if not assigned(inlinecode) then
paramanager.freeparaloc(exprasmlist,ppn.tempcgpara);
tmpparaloc:=ppn.tempcgpara.location;
callerparaloc:=ppn.paraitem.paraloc[callerside].location;
while assigned(callerparaloc) do
begin
{ Every paraloc must have a matching tmpparaloc }
if not assigned(tmpparaloc) then
internalerror(200408224);
if callerparaloc^.size<>tmpparaloc^.size then
internalerror(200408225);
case callerparaloc^.loc of
LOC_REGISTER:
begin
if tmpparaloc^.loc<>LOC_REGISTER then
internalerror(200408221);
if getsupreg(callerparaloc^.register)<first_int_imreg then
cg.getcpuregister(exprasmlist,callerparaloc^.register);
cg.a_load_reg_reg(exprasmlist,tmpparaloc^.size,tmpparaloc^.size,
tmpparaloc^.register,callerparaloc^.register);
end;
LOC_FPUREGISTER:
begin
if tmpparaloc^.loc<>LOC_FPUREGISTER then
internalerror(200408222);
if getsupreg(callerparaloc^.register)<first_fpu_imreg then
cg.getcpuregister(exprasmlist,callerparaloc^.register);
cg.a_loadfpu_reg_reg(exprasmlist,ppn.tempcgpara.size,tmpparaloc^.register,callerparaloc^.register);
end;
LOC_MMREGISTER:
begin
if tmpparaloc^.loc<>LOC_MMREGISTER then
internalerror(200408223);
if getsupreg(callerparaloc^.register)<first_mm_imreg then
cg.getcpuregister(exprasmlist,callerparaloc^.register);
cg.a_loadmm_reg_reg(exprasmlist,tmpparaloc^.size,tmpparaloc^.size,
tmpparaloc^.register,callerparaloc^.register,mms_movescalar);
end;
LOC_REFERENCE:
begin
if not assigned(inlinecode) then
begin
{$ifdef cputargethasfixedstack}
reference_reset_base(href,callerparaloc^.reference.index,callerparaloc^.reference.offset);
{ copy parameters in case they were moved to a temp. location because we've a fixed stack }
case tmpparaloc^.loc of
LOC_REFERENCE:
begin
reference_reset_base(htempref,tmpparaloc^.reference.index,tmpparaloc^.reference.offset);
{ use concatcopy, because it can also be a float which fails when
load_ref_ref is used }
cg.g_concatcopy(exprasmlist,htempref,href,tcgsize2size[tmpparaloc^.size]);
end;
LOC_REGISTER:
cg.a_load_reg_ref(exprasmlist,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href);
LOC_FPUREGISTER:
cg.a_loadfpu_reg_ref(exprasmlist,tmpparaloc^.size,tmpparaloc^.register,href);
LOC_MMREGISTER:
cg.a_loadmm_reg_ref(exprasmlist,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href,mms_movescalar);
else
internalerror(200402081);
end;
{$endif cputargethasfixedstack}
end;
end;
end;
callerparaloc:=callerparaloc^.next;
tmpparaloc:=tmpparaloc^.next;
end;
end;
ppn:=tcgcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.freeparas;
var
ppn : tcgcallparanode;
begin
{ free the resources allocated for the parameters }
ppn:=tcgcallparanode(left);
while assigned(ppn) do
begin
if not assigned(inlinecode) or
(ppn.paraitem.paraloc[callerside].location^.loc <> LOC_REFERENCE) then
paramanager.freeparaloc(exprasmlist,ppn.paraitem.paraloc[callerside]);
ppn:=tcgcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.normal_pass_2;
var
regs_to_save_int,
regs_to_save_fpu,
regs_to_save_mm : Tcpuregisterset;
href : treference;
pop_size : longint;
pvreg,
vmtreg : tregister;
oldaktcallnode : tcallnode;
funcretloc : pcgparalocation;
begin
if not assigned(procdefinition) or
not procdefinition.has_paraloc_info then
internalerror(200305264);
if resulttype.def.needs_inittable and
not paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) and
not assigned(funcretnode) then
begin
tg.gettemptyped(exprasmlist,resulttype.def,tt_normal,refcountedtemp);
cg.g_decrrefcount(exprasmlist,resulttype.def,refcountedtemp);
end;
regs_to_save_int:=paramanager.get_volatile_registers_int(procdefinition.proccalloption);
regs_to_save_fpu:=paramanager.get_volatile_registers_fpu(procdefinition.proccalloption);
regs_to_save_mm:=paramanager.get_volatile_registers_mm(procdefinition.proccalloption);
{ Include Function result registers }
if (not is_void(resulttype.def)) then
begin
funcretloc:=procdefinition.funcret_paraloc[callerside].location;
while assigned(funcretloc) do
begin
case funcretloc^.loc of
LOC_REGISTER,
LOC_CREGISTER:
include(regs_to_save_int,getsupreg(funcretloc^.register));
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
include(regs_to_save_fpu,getsupreg(funcretloc^.register));
LOC_MMREGISTER,
LOC_CMMREGISTER:
include(regs_to_save_mm,getsupreg(funcretloc^.register));
end;
funcretloc:=funcretloc^.next;
end;
end;
{ Process parameters, register parameters will be loaded
in imaginary registers. The actual load to the correct
register is done just before the call }
oldaktcallnode:=aktcallnode;
aktcallnode:=self;
if assigned(left) then
tcallparanode(left).secondcallparan;
aktcallnode:=oldaktcallnode;
{ procedure variable or normal function call ? }
if (right=nil) then
begin
if (po_virtualmethod in procdefinition.procoptions) and
assigned(methodpointer) then
begin
secondpass(methodpointer);
location_force_reg(exprasmlist,methodpointer.location,OS_ADDR,false);
{ virtual methods require an index }
if tprocdef(procdefinition).extnumber=-1 then
internalerror(200304021);
{ VMT should already be loaded in a register }
if methodpointer.location.register=NR_NO then
internalerror(200304022);
{ test validity of VMT }
if not(is_interface(tprocdef(procdefinition)._class)) and
not(is_cppclass(tprocdef(procdefinition)._class)) then
cg.g_maybe_testvmt(exprasmlist,methodpointer.location.register,tprocdef(procdefinition)._class);
end;
{$warning fixme regvars}
{ rg.saveotherregvars(exprasmlist,regs_to_push_other);}
if (po_virtualmethod in procdefinition.procoptions) and
assigned(methodpointer) then
begin
vmtreg:=methodpointer.location.register;
pvreg:=cg.getintregister(exprasmlist,OS_ADDR);
reference_reset_base(href,vmtreg,
tprocdef(procdefinition)._class.vmtmethodoffset(tprocdef(procdefinition).extnumber));
cg.a_load_ref_reg(exprasmlist,OS_ADDR,OS_ADDR,href,pvreg);
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(exprasmlist,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(exprasmlist,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(exprasmlist,R_MMREGISTER,regs_to_save_mm);
{ call method }
extra_call_code;
cg.a_call_reg(exprasmlist,pvreg);
end
else
begin
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(exprasmlist,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(exprasmlist,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(exprasmlist,R_MMREGISTER,regs_to_save_mm);
if procdefinition.proccalloption=pocall_syscall then
do_syscall
else
begin
{ Calling interrupt from the same code requires some
extra code }
if (po_interrupt in procdefinition.procoptions) then
extra_interrupt_code;
extra_call_code;
cg.a_call_name(exprasmlist,tprocdef(procdefinition).mangledname);
end;
end;
end
else
{ now procedure variable case }
begin
secondpass(right);
pvreg:=cg.getintregister(exprasmlist,OS_ADDR);
{ Only load OS_ADDR from the reference }
if right.location.loc in [LOC_REFERENCE,LOC_CREFERENCE] then
cg.a_load_ref_reg(exprasmlist,OS_ADDR,OS_ADDR,right.location.reference,pvreg)
else
cg.a_load_loc_reg(exprasmlist,OS_ADDR,right.location,pvreg);
location_freetemp(exprasmlist,right.location);
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(exprasmlist,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(exprasmlist,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(exprasmlist,R_MMREGISTER,regs_to_save_mm);
{ Calling interrupt from the same code requires some
extra code }
if (po_interrupt in procdefinition.procoptions) then
extra_interrupt_code;
{$warning fixme regvars.}
{ rg.saveotherregvars(exprasmlist,ALL_OTHERREGISTERS);}
extra_call_code;
cg.a_call_reg(exprasmlist,pvreg);
end;
{ Need to remove the parameters from the stack? }
if (procdefinition.proccalloption in clearstack_pocalls) then
begin
pop_size:=pushedparasize;
{ for Cdecl functions we don't need to pop the funcret when it
was pushed by para }
if paramanager.ret_in_param(procdefinition.rettype.def,procdefinition.proccalloption) then
dec(pop_size,sizeof(aint));
{ Remove parameters/alignment from the stack }
pop_parasize(pop_size);
end;
{ Release registers, but not the registers that contain the
function result }
if (not is_void(resulttype.def)) then
begin
funcretloc:=procdefinition.funcret_paraloc[callerside].location;
while assigned(funcretloc) do
begin
case funcretloc^.loc of
LOC_REGISTER,
LOC_CREGISTER:
exclude(regs_to_save_int,getsupreg(funcretloc^.register));
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
exclude(regs_to_save_fpu,getsupreg(funcretloc^.register));
LOC_MMREGISTER,
LOC_CMMREGISTER:
exclude(regs_to_save_mm,getsupreg(funcretloc^.register));
end;
funcretloc:=funcretloc^.next;
end;
end;
if cg.uses_registers(R_MMREGISTER) then
cg.dealloccpuregisters(exprasmlist,R_MMREGISTER,regs_to_save_mm);
if cg.uses_registers(R_FPUREGISTER) then
cg.dealloccpuregisters(exprasmlist,R_FPUREGISTER,regs_to_save_fpu);
cg.dealloccpuregisters(exprasmlist,R_INTREGISTER,regs_to_save_int);
{ handle function results }
if (not is_void(resulttype.def)) then
handle_return_value
else
location_reset(location,LOC_VOID,OS_NO);
{ perhaps i/o check ? }
if (cs_check_io in aktlocalswitches) and
(po_iocheck in procdefinition.procoptions) and
not(po_iocheck in current_procinfo.procdef.procoptions) and
{ no IO check for methods and procedure variables }
(right=nil) and
not(po_virtualmethod in procdefinition.procoptions) then
begin
cg.alloccpuregisters(exprasmlist,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
cg.a_call_name(exprasmlist,'FPC_IOCHECK');
cg.dealloccpuregisters(exprasmlist,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
end;
{ release temps of paras }
release_para_temps;
end;
procedure tcgcallnode.inlined_pass_2;
var
oldaktcallnode : tcallnode;
oldprocinfo : tprocinfo;
oldinlining_procedure : boolean;
inlineentrycode,inlineexitcode : TAAsmoutput;
{$ifdef GDB}
startlabel,endlabel : tasmlabel;
pp : pchar;
mangled_length : longint;
{$endif GDB}
begin
if not(assigned(procdefinition) and (procdefinition.deftype=procdef)) then
internalerror(200305262);
oldinlining_procedure:=inlining_procedure;
oldprocinfo:=current_procinfo;
{ we're inlining a procedure }
inlining_procedure:=true;
{ Add inling start }
{$ifdef GDB}
exprasmlist.concat(Tai_force_line.Create);
{$endif GDB}
exprasmList.concat(Tai_Marker.Create(InlineStart));
{$ifdef extdebug}
exprasmList.concat(tai_comment.Create(strpnew('Start of inlined proc '+tprocdef(procdefinition).procsym.name)));
{$endif extdebug}
{ calculate registers to pass the parameters }
paramanager.create_inline_paraloc_info(procdefinition);
{ Allocate parameters and locals }
gen_alloc_inline_parast(exprasmlist,tprocdef(procdefinition));
gen_alloc_inline_funcret(exprasmlist,tprocdef(procdefinition));
gen_alloc_symtable(exprasmlist,tprocdef(procdefinition).localst);
{ if we allocate the temp. location for ansi- or widestrings }
{ already here, we avoid later a push/pop }
if resulttype.def.needs_inittable and
not paramanager.ret_in_param(resulttype.def,procdefinition.proccalloption) then
begin
tg.gettemptyped(exprasmlist,resulttype.def,tt_normal,refcountedtemp);
cg.g_decrrefcount(exprasmlist,resulttype.def,refcountedtemp);
end;
{ Push parameters, still use the old current_procinfo. This
is required that have the correct information available like
_class and nested procedure }
oldaktcallnode:=aktcallnode;
aktcallnode:=self;
if assigned(left) then
begin
tcallparanode(left).secondcallparan;
pushparas;
end;
aktcallnode:=oldaktcallnode;
{ create temp procinfo that will be used for the inlinecode tree }
current_procinfo:=cprocinfo.create(nil);
current_procinfo.procdef:=tprocdef(procdefinition);
current_procinfo.flags:=oldprocinfo.flags;
current_procinfo.aktlocaldata.destroy;
current_procinfo.aktlocaldata:=oldprocinfo.aktlocaldata;
{ when the oldprocinfo is also being inlined reuse the
inlining_procinfo }
if assigned(oldprocinfo.inlining_procinfo) then
current_procinfo.inlining_procinfo:=oldprocinfo.inlining_procinfo
else
current_procinfo.inlining_procinfo:=oldprocinfo;
{ takes care of local data initialization }
inlineentrycode:=TAAsmoutput.Create;
inlineexitcode:=TAAsmoutput.Create;
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
not(cs_gdb_valgrind in aktglobalswitches) then
begin
objectlibrary.getaddrlabel(startlabel);
objectlibrary.getaddrlabel(endlabel);
cg.a_label(exprasmlist,startlabel);
{ Here we must include the para and local symtable info }
procdefinition.concatstabto(withdebuglist);
mangled_length:=length(current_procinfo.inlining_procinfo.procdef.mangledname);
getmem(pp,mangled_length+50);
strpcopy(pp,'192,0,0,'+startlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),current_procinfo.inlining_procinfo.procdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
end;
{$endif GDB}
gen_load_para_value(inlineentrycode);
{ now that we've loaded the para's, free them }
if assigned(left) then
freeparas;
gen_initialize_code(inlineentrycode);
if po_assembler in current_procinfo.procdef.procoptions then
inlineentrycode.insert(Tai_marker.Create(asmblockstart));
exprasmList.concatlist(inlineentrycode);
{ process the inline code }
secondpass(inlinecode);
cg.a_label(exprasmlist,current_procinfo.aktexitlabel);
gen_finalize_code(inlineexitcode);
gen_load_return_value(inlineexitcode);
if po_assembler in current_procinfo.procdef.procoptions then
inlineexitcode.concat(Tai_marker.Create(asmblockend));
exprasmlist.concatlist(inlineexitcode);
inlineentrycode.free;
inlineexitcode.free;
{$ifdef extdebug}
exprasmList.concat(tai_comment.Create(strpnew('End of inlined proc')));
{$endif extdebug}
exprasmList.concat(Tai_Marker.Create(InlineEnd));
{ handle function results }
if (not is_void(resulttype.def)) then
handle_return_value
else
location_reset(location,LOC_VOID,OS_NO);
{ perhaps i/o check ? }
if (cs_check_io in aktlocalswitches) and
(po_iocheck in procdefinition.procoptions) and
not(po_iocheck in current_procinfo.procdef.procoptions) and
{ no IO check for methods and procedure variables }
(right=nil) and
not(po_virtualmethod in procdefinition.procoptions) then
begin
cg.alloccpuregisters(exprasmlist,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
cg.a_call_name(exprasmlist,'FPC_IOCHECK');
cg.dealloccpuregisters(exprasmlist,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
end;
{ release temps of paras }
release_para_temps;
{ if return value is not used }
if (not is_void(resulttype.def)) and
(not(cnf_return_value_used in callnodeflags)) then
begin
if location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
begin
{ data which must be finalized ? }
if (resulttype.def.needs_inittable) then
cg.g_finalize(exprasmlist,resulttype.def,location.reference);
{ release unused temp }
tg.ungetiftemp(exprasmlist,location.reference)
end
else if location.loc=LOC_FPUREGISTER then
begin
{$ifdef x86}
{ release FPU stack }
emit_reg(A_FSTP,S_NO,NR_FPU_RESULT_REG);
{$endif x86}
end;
end;
{ Release parameters and locals }
gen_free_symtable(exprasmlist,tparasymtable(current_procinfo.procdef.parast));
gen_free_symtable(exprasmlist,tlocalsymtable(current_procinfo.procdef.localst));
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
not(cs_gdb_valgrind in aktglobalswitches) then
begin
cg.a_label(exprasmlist,endlabel);
strpcopy(pp,'224,0,0,'+endlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(pp),'-');
strpcopy(strend(pp),current_procinfo.inlining_procinfo.procdef.mangledname);
end;
withdebugList.concat(Tai_stabn.Create(strnew(pp)));
freemem(pp,mangled_length+50);
end;
{$endif GDB}
{ restore }
current_procinfo.aktlocaldata:=nil;
current_procinfo.destroy;
current_procinfo:=oldprocinfo;
inlining_procedure:=oldinlining_procedure;
end;
procedure tcgcallnode.pass_2;
begin
if assigned(methodpointerinit) then
secondpass(methodpointerinit);
if assigned(inlinecode) then
inlined_pass_2
else
normal_pass_2;
if assigned(methodpointerdone) then
secondpass(methodpointerdone);
end;
begin
ccallparanode:=tcgcallparanode;
ccallnode:=tcgcallnode;
end.
{
$Log$
Revision 1.181 2004-10-24 20:01:08 peter
* remove saveregister calling convention
Revision 1.180 2004/10/24 11:53:45 peter
* fixed compilation with removed loadref
Revision 1.179 2004/10/24 11:44:28 peter
* small regvar fixes
* loadref parameter removed from concatcopy,incrrefcount,etc
Revision 1.178 2004/10/15 09:14:16 mazen
- remove $IFDEF DELPHI and related code
- remove $IFDEF FPCPROCVAR and related code
Revision 1.177 2004/10/10 20:21:18 peter
* passing a var parameter to var parameter is now also allowed
for register locations (=regvars)
Revision 1.176 2004/09/27 15:15:20 peter
* dealloc function result registers, register allocation is now
back at pre-paraloc level
Revision 1.175 2004/09/25 14:23:54 peter
* ungetregister is now only used for cpuregisters, renamed to
ungetcpuregister
* renamed (get|unget)explicitregister(s) to ..cpuregister
* removed location-release/reference_release
Revision 1.174 2004/09/21 17:25:12 peter
* paraloc branch merged
Revision 1.173.4.3 2004/09/20 20:46:34 peter
* register allocation optimized for 64bit loading of parameters
and return values
Revision 1.173.4.2 2004/09/17 17:19:26 peter
* fixed 64 bit unaryminus for sparc
* fixed 64 bit inlining
* signness of not operation
Revision 1.173.4.1 2004/08/31 20:43:06 peter
* paraloc patch
Revision 1.173 2004/07/12 10:47:42 michael
+ Fix for bug 3207 from Peter
Revision 1.172 2004/07/11 19:01:13 peter
* comps are passed in int registers
Revision 1.171 2004/07/09 23:41:04 jonas
* support register parameters for inlined procedures + some inline
cleanups
Revision 1.170 2004/06/29 20:56:46 peter
* constructors don't return in parameter
Revision 1.169 2004/06/20 08:55:29 florian
* logs truncated
Revision 1.168 2004/06/16 20:07:08 florian
* dwarf branch merged
Revision 1.167 2004/05/23 18:28:41 peter
* methodpointer is loaded into a temp when it was a calln
Revision 1.166 2004/05/22 23:34:27 peter
tai_regalloc.allocation changed to ratype to notify rgobj of register size changes
Revision 1.165 2004/04/28 15:19:03 florian
+ syscall directive support for MorphOS added
Revision 1.164.2.13 2004/06/12 17:01:01 florian
* fixed compilation of arm compiler
}
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