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686a2d2f3f
on the stack, this can be enabled by -OoFORCENOSTACKFRAME. This reduces the required entry/exit code and makes an extra register available to the compiler. However, since this is based on an estimation of the required stack size, it might have two drawbacks: either the stack frame is estimated to big, the program requires a bigger stack than needed or it is estimated too small, then the compiler throws an internalerror during compilation. These issues can be overcome as soon as the compiler supports recompiling subroutines if needed. git-svn-id: trunk@27239 -
2403 lines
96 KiB
ObjectPascal
2403 lines
96 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl, Daniel Mantione
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Does the parsing and codegeneration at subroutine level
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit psub;
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{$i fpcdefs.inc}
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interface
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uses
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globals,
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node,nbas,
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symdef,procinfo,optdfa;
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type
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{ tcgprocinfo }
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tcgprocinfo = class(tprocinfo)
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private
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procedure CreateInlineInfo;
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{ returns the node which is the start of the user code, this is needed by the dfa }
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function GetUserCode: tnode;
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procedure maybe_add_constructor_wrapper(var tocode: tnode; withexceptblock: boolean);
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procedure add_entry_exit_code;
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procedure setup_tempgen;
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public
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{ code for the subroutine as tree }
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code : tnode;
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{ positions in the tree for init/final }
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entry_asmnode,
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loadpara_asmnode,
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exitlabel_asmnode,
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stackcheck_asmnode,
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init_asmnode,
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final_asmnode : tasmnode;
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final_used : boolean;
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dfabuilder : TDFABuilder;
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destructor destroy;override;
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procedure printproc(pass:string);
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procedure generate_code;
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procedure generate_code_tree;
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procedure generate_exceptfilter(nestedpi: tcgprocinfo);
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procedure resetprocdef;
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procedure add_to_symtablestack;
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procedure remove_from_symtablestack;
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procedure parse_body;
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function has_assembler_child : boolean;
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end;
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procedure printnode_reset;
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{ reads the declaration blocks }
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procedure read_declarations(islibrary : boolean);
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{ reads declarations in the interface part of a unit }
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procedure read_interface_declarations;
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{ reads any routine in the implementation, or a non-method routine
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declaration in the interface (depending on whether or not parse_only is
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true) }
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procedure read_proc(isclassmethod:boolean; usefwpd: tprocdef);
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procedure generate_specialization_procs;
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implementation
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uses
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sysutils,
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{ common }
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cutils,
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{ global }
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globtype,tokens,verbose,comphook,constexp,
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systems,cpubase,aasmbase,aasmtai,aasmdata,
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{ symtable }
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symconst,symbase,symsym,symtype,symtable,defutil,symcreat,
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paramgr,
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ppu,fmodule,
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{ pass 1 }
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nutils,ngenutil,nld,ncal,ncon,nflw,nadd,ncnv,nmem,
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pass_1,
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{$ifdef state_tracking}
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nstate,
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{$endif state_tracking}
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{ pass 2 }
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{$ifndef NOPASS2}
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pass_2,
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{$endif}
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{ parser }
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scanner,gendef,
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pbase,pstatmnt,pdecl,pdecsub,pexports,pgenutil,pparautl,
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{ codegen }
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tgobj,cgbase,cgobj,cgutils,hlcgobj,hlcgcpu,dbgbase,
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ncgutil,regvars,
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optbase,
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opttail,
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optcse,
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optloop,
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optconstprop,
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optdeadstore
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{$if defined(arm) or defined(avr) or defined(fpc_compiler_has_fixup_jmps)}
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,aasmcpu
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{$endif arm}
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{$if defined(arm)}
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,cpuinfo
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{$endif arm}
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{$ifndef NOOPT}
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{$ifdef i386}
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,aopt386
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{$else i386}
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,aopt
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{$endif i386}
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{$endif}
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;
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function checknodeinlining(procdef: tprocdef): boolean;
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var
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i : integer;
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currpara : tparavarsym;
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begin
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result := false;
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if pi_has_assembler_block in current_procinfo.flags then
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begin
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Message1(parser_h_not_supported_for_inline,'assembler');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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if pi_has_global_goto in current_procinfo.flags then
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begin
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Message1(parser_h_not_supported_for_inline,'global goto');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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if pi_has_nested_exit in current_procinfo.flags then
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begin
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Message1(parser_h_not_supported_for_inline,'nested exit');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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{ the compiler cannot handle inherited in inlined subroutines because
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it tries to search for self in the symtable, however, the symtable
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is not available }
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if pi_has_inherited in current_procinfo.flags then
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begin
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Message1(parser_h_not_supported_for_inline,'inherited');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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for i:=0 to procdef.paras.count-1 do
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begin
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currpara:=tparavarsym(procdef.paras[i]);
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case currpara.vardef.typ of
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formaldef :
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begin
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if (currpara.varspez in [vs_out,vs_var,vs_const,vs_constref]) then
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begin
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Message1(parser_h_not_supported_for_inline,'formal parameter');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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end;
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arraydef :
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begin
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if is_array_of_const(currpara.vardef) or
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is_variant_array(currpara.vardef) then
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begin
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Message1(parser_h_not_supported_for_inline,'array of const');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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{ open arrays might need re-basing of the index, i.e. if you pass
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an array[1..10] as open array, you have to add 1 to all index operations
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if you directly inline it }
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if is_open_array(currpara.vardef) then
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begin
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Message1(parser_h_not_supported_for_inline,'open array');
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Message(parser_h_inlining_disabled);
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exit;
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end;
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end;
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end;
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end;
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result:=true;
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end;
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{****************************************************************************
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PROCEDURE/FUNCTION BODY PARSING
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****************************************************************************}
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procedure initializedefaultvars(p:TObject;arg:pointer);
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var
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b : tblocknode;
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begin
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if tsym(p).typ<>localvarsym then
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exit;
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with tabstractnormalvarsym(p) do
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begin
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if (vo_is_default_var in varoptions) and (vardef.size>0) then
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begin
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b:=tblocknode(arg);
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b.left:=cstatementnode.create(
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ccallnode.createintern('fpc_zeromem',
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ccallparanode.create(
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cordconstnode.create(vardef.size,ptruinttype,false),
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ccallparanode.create(
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caddrnode.create_internal(
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cloadnode.create(tsym(p),tsym(p).owner)),
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nil
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)
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)
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),
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b.left);
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end;
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end;
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end;
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procedure initializevars(p:TObject;arg:pointer);
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var
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b : tblocknode;
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begin
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if not (tsym(p).typ in [localvarsym,staticvarsym]) then
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exit;
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with tabstractnormalvarsym(p) do
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begin
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if assigned(defaultconstsym) then
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begin
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b:=tblocknode(arg);
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b.left:=cstatementnode.create(
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cassignmentnode.create(
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cloadnode.create(tsym(p),tsym(p).owner),
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cloadnode.create(defaultconstsym,defaultconstsym.owner)),
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b.left);
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end
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else
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initializedefaultvars(p,arg);
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end;
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end;
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procedure check_finalize_paras(p:TObject;arg:pointer);
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begin
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if (tsym(p).typ=paravarsym) then
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begin
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if tparavarsym(p).needs_finalization then
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include(current_procinfo.flags,pi_needs_implicit_finally);
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if (tparavarsym(p).varspez in [vs_value,vs_out]) and
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(cs_create_pic in current_settings.moduleswitches) and
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(tf_pic_uses_got in target_info.flags) and
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is_rtti_managed_type(tparavarsym(p).vardef) then
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include(current_procinfo.flags,pi_needs_got);
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end;
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end;
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procedure check_finalize_locals(p:TObject;arg:pointer);
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begin
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{ include the result: it needs to be finalized in case an exception }
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{ occurs }
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if (tsym(p).typ=localvarsym) and
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(tlocalvarsym(p).refs>0) and
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is_managed_type(tlocalvarsym(p).vardef) then
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begin
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include(current_procinfo.flags,pi_needs_implicit_finally);
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if is_rtti_managed_type(tlocalvarsym(p).vardef) and
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(cs_create_pic in current_settings.moduleswitches) and
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(tf_pic_uses_got in target_info.flags) then
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include(current_procinfo.flags,pi_needs_got);
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end;
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end;
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function block(islibrary : boolean) : tnode;
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var
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oldfilepos: tfileposinfo;
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begin
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{ parse const,types and vars }
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read_declarations(islibrary);
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{ do we have an assembler block without the po_assembler?
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we should allow this for Delphi compatibility (PFV) }
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if (token=_ASM) and (m_delphi in current_settings.modeswitches) then
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include(current_procinfo.procdef.procoptions,po_assembler);
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{ Handle assembler block different }
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if (po_assembler in current_procinfo.procdef.procoptions) then
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begin
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block:=assembler_block;
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exit;
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end;
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{Unit initialization?.}
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if (
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assigned(current_procinfo.procdef.localst) and
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(current_procinfo.procdef.localst.symtablelevel=main_program_level) and
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(current_module.is_unit or islibrary)
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) then
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begin
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if (token=_END) then
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begin
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consume(_END);
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{ We need at least a node, else the entry/exit code is not
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generated and thus no PASCALMAIN symbol which we need (PFV) }
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if islibrary then
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block:=cnothingnode.create
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else
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block:=nil;
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end
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else
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begin
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if token=_INITIALIZATION then
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begin
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{ The library init code is already called and does not
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need to be in the initfinal table (PFV) }
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block:=statement_block(_INITIALIZATION);
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end
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else if token=_FINALIZATION then
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begin
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{ when a unit has only a finalization section, we can come to this
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point when we try to read the nonh existing initalization section
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so we've to check if we are really try to parse the finalization }
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if current_procinfo.procdef.proctypeoption=potype_unitfinalize then
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block:=statement_block(_FINALIZATION)
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else
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block:=nil;
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end
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else
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block:=statement_block(_BEGIN);
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end;
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end
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else
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begin
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{ parse routine body }
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block:=statement_block(_BEGIN);
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{ initialized variables }
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if current_procinfo.procdef.localst.symtabletype=localsymtable then
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begin
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{ initialization of local variables with their initial
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values: part of function entry }
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oldfilepos:=current_filepos;
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current_filepos:=current_procinfo.entrypos;
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current_procinfo.procdef.localst.SymList.ForEachCall(@initializevars,block);
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current_filepos:=oldfilepos;
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end
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else if current_procinfo.procdef.localst.symtabletype=staticsymtable then
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begin
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{ for program and unit initialization code we also need to
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initialize the local variables used of Default() }
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oldfilepos:=current_filepos;
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current_filepos:=current_procinfo.entrypos;
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current_procinfo.procdef.localst.SymList.ForEachCall(@initializedefaultvars,block);
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current_filepos:=oldfilepos;
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end;
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if assigned(current_procinfo.procdef.parentfpstruct) then
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begin
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{ we only do this after the code has been parsed because
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otherwise for-loop counters moved to the struct cause
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errors; we still do it nevertheless to prevent false
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"unused" symbols warnings and to assist debug info
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generation }
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redirect_parentfpstruct_local_syms(current_procinfo.procdef);
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{ finish the parentfpstruct (add padding, ...) }
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finish_parentfpstruct(current_procinfo.procdef);
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end;
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end;
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end;
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{****************************************************************************
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PROCEDURE/FUNCTION COMPILING
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****************************************************************************}
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procedure printnode_reset;
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begin
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assign(printnodefile,treelogfilename);
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{$push}{$I-}
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rewrite(printnodefile);
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{$pop}
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if ioresult<>0 then
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begin
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Comment(V_Error,'Error creating '+treelogfilename);
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exit;
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end;
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close(printnodefile);
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end;
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procedure add_label_init(p:TObject;arg:pointer);
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begin
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if tstoredsym(p).typ=labelsym then
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begin
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addstatement(tstatementnode(arg^),
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cifnode.create(caddnode.create(equaln,
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ccallnode.createintern('fpc_setjmp',
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ccallparanode.create(cloadnode.create(tlabelsym(p).jumpbuf,tlabelsym(p).jumpbuf.owner),nil)),
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cordconstnode.create(1,sinttype,true))
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,cgotonode.create(tlabelsym(p)),nil)
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);
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end;
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end;
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|
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function generate_bodyentry_block:tnode;
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var
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srsym : tsym;
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para : tcallparanode;
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call : tcallnode;
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newstatement : tstatementnode;
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def : tabstractrecorddef;
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begin
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result:=internalstatements(newstatement);
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|
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if assigned(current_structdef) then
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begin
|
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{ a constructor needs a help procedure }
|
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if (current_procinfo.procdef.proctypeoption=potype_constructor) then
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begin
|
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if is_class(current_structdef) or
|
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(
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is_objectpascal_helper(current_structdef) and
|
|
is_class(tobjectdef(current_structdef).extendeddef)
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|
) then
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begin
|
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if is_objectpascal_helper(current_structdef) then
|
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def:=tabstractrecorddef(tobjectdef(current_structdef).extendeddef)
|
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else
|
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def:=current_structdef;
|
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srsym:=search_struct_member(def,'NEWINSTANCE');
|
|
if assigned(srsym) and
|
|
(srsym.typ=procsym) then
|
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begin
|
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{ if vmt=1 then newinstance }
|
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addstatement(newstatement,cifnode.create(
|
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caddnode.create_internal(equaln,
|
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ctypeconvnode.create_internal(
|
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load_vmt_pointer_node,
|
|
voidpointertype),
|
|
cpointerconstnode.create(1,voidpointertype)),
|
|
cassignmentnode.create(
|
|
ctypeconvnode.create_internal(
|
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load_self_pointer_node,
|
|
voidpointertype),
|
|
ccallnode.create(nil,tprocsym(srsym),srsym.owner,
|
|
ctypeconvnode.create_internal(load_self_pointer_node,tclassrefdef.create(current_structdef)),
|
|
[])),
|
|
nil));
|
|
end
|
|
else
|
|
internalerror(200305108);
|
|
end
|
|
else
|
|
if is_object(current_structdef) then
|
|
begin
|
|
{ parameter 3 : vmt_offset }
|
|
{ parameter 2 : address of pointer to vmt,
|
|
this is required to allow setting the vmt to -1 to indicate
|
|
that memory was allocated }
|
|
{ parameter 1 : self pointer }
|
|
para:=ccallparanode.create(
|
|
cordconstnode.create(tobjectdef(current_structdef).vmt_offset,s32inttype,false),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_vmt_pointer_node,
|
|
voidpointertype),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_self_pointer_node,
|
|
voidpointertype),
|
|
nil)));
|
|
addstatement(newstatement,cassignmentnode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_self_pointer_node,
|
|
voidpointertype),
|
|
ccallnode.createintern('fpc_help_constructor',para)));
|
|
end
|
|
else
|
|
if is_javaclass(current_structdef) or
|
|
((target_info.system in systems_jvm) and
|
|
is_record(current_structdef)) then
|
|
begin
|
|
if (current_procinfo.procdef.proctypeoption=potype_constructor) and
|
|
not current_procinfo.ConstructorCallingConstructor then
|
|
begin
|
|
{ call inherited constructor }
|
|
if is_javaclass(current_structdef) then
|
|
srsym:=search_struct_member_no_helper(tobjectdef(current_structdef).childof,'CREATE')
|
|
else
|
|
srsym:=search_struct_member_no_helper(java_fpcbaserecordtype,'CREATE');
|
|
if assigned(srsym) and
|
|
(srsym.typ=procsym) then
|
|
begin
|
|
call:=ccallnode.create(nil,tprocsym(srsym),srsym.owner,load_self_node,[cnf_inherited]);
|
|
exclude(tcallnode(call).callnodeflags,cnf_return_value_used);
|
|
addstatement(newstatement,call);
|
|
end
|
|
else
|
|
internalerror(2011010312);
|
|
end;
|
|
end
|
|
else
|
|
if not is_record(current_structdef) and
|
|
not (
|
|
is_objectpascal_helper(current_structdef) and
|
|
(tobjectdef(current_structdef).extendeddef.typ<>objectdef)
|
|
) then
|
|
internalerror(200305103);
|
|
{ if self=nil then exit
|
|
calling fail instead of exit is useless because
|
|
there is nothing to dispose (PFV) }
|
|
if is_class_or_object(current_structdef) then
|
|
addstatement(newstatement,cifnode.create(
|
|
caddnode.create(equaln,
|
|
load_self_pointer_node,
|
|
cnilnode.create),
|
|
cexitnode.create(nil),
|
|
nil));
|
|
end;
|
|
|
|
{ maybe call BeforeDestruction for classes }
|
|
if (current_procinfo.procdef.proctypeoption=potype_destructor) and
|
|
is_class(current_structdef) then
|
|
begin
|
|
srsym:=search_struct_member(current_structdef,'BEFOREDESTRUCTION');
|
|
if assigned(srsym) and
|
|
(srsym.typ=procsym) then
|
|
begin
|
|
{ if vmt>0 then beforedestruction }
|
|
addstatement(newstatement,cifnode.create(
|
|
caddnode.create(gtn,
|
|
ctypeconvnode.create_internal(
|
|
load_vmt_pointer_node,ptrsinttype),
|
|
ctypeconvnode.create_internal(
|
|
cnilnode.create,ptrsinttype)),
|
|
ccallnode.create(nil,tprocsym(srsym),srsym.owner,load_self_node,[]),
|
|
nil));
|
|
end
|
|
else
|
|
internalerror(200305104);
|
|
end;
|
|
end;
|
|
if m_non_local_goto in current_settings.modeswitches then
|
|
tsymtable(current_procinfo.procdef.localst).SymList.ForEachCall(@add_label_init,@newstatement);
|
|
end;
|
|
|
|
|
|
function generate_bodyexit_block:tnode;
|
|
var
|
|
srsym : tsym;
|
|
para : tcallparanode;
|
|
newstatement : tstatementnode;
|
|
oldlocalswitches: tlocalswitches;
|
|
begin
|
|
result:=internalstatements(newstatement);
|
|
|
|
if assigned(current_structdef) then
|
|
begin
|
|
{ Don't test self and the vmt here. The reason is that }
|
|
{ a constructor already checks whether these are valid }
|
|
{ before. Further, in case of TThread the thread may }
|
|
{ free the class instance right after AfterConstruction }
|
|
{ has been called, so it may no longer be valid (JM) }
|
|
oldlocalswitches:=current_settings.localswitches;
|
|
current_settings.localswitches:=oldlocalswitches-[cs_check_object,cs_check_range];
|
|
|
|
{ a destructor needs a help procedure }
|
|
if (current_procinfo.procdef.proctypeoption=potype_destructor) then
|
|
begin
|
|
if is_class(current_structdef) then
|
|
begin
|
|
srsym:=search_struct_member(current_structdef,'FREEINSTANCE');
|
|
if assigned(srsym) and
|
|
(srsym.typ=procsym) then
|
|
begin
|
|
{ if self<>0 and vmt<>0 then freeinstance }
|
|
addstatement(newstatement,cifnode.create(
|
|
caddnode.create(andn,
|
|
caddnode.create(unequaln,
|
|
load_self_pointer_node,
|
|
cnilnode.create),
|
|
caddnode.create(unequaln,
|
|
ctypeconvnode.create(
|
|
load_vmt_pointer_node,
|
|
voidpointertype),
|
|
cpointerconstnode.create(0,voidpointertype))),
|
|
ccallnode.create(nil,tprocsym(srsym),srsym.owner,load_self_node,[]),
|
|
nil));
|
|
end
|
|
else
|
|
internalerror(200305108);
|
|
end
|
|
else
|
|
if is_object(current_structdef) then
|
|
begin
|
|
{ finalize object data, but only if not in inherited call }
|
|
if is_managed_type(current_structdef) then
|
|
begin
|
|
addstatement(newstatement,cifnode.create(
|
|
caddnode.create(unequaln,
|
|
ctypeconvnode.create_internal(load_vmt_pointer_node,voidpointertype),
|
|
cnilnode.create),
|
|
cnodeutils.finalize_data_node(load_self_node),
|
|
nil));
|
|
end;
|
|
{ parameter 3 : vmt_offset }
|
|
{ parameter 2 : pointer to vmt }
|
|
{ parameter 1 : self pointer }
|
|
para:=ccallparanode.create(
|
|
cordconstnode.create(tobjectdef(current_structdef).vmt_offset,s32inttype,false),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_vmt_pointer_node,
|
|
voidpointertype),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_self_pointer_node,
|
|
voidpointertype),
|
|
nil)));
|
|
addstatement(newstatement,
|
|
ccallnode.createintern('fpc_help_destructor',para));
|
|
end
|
|
else if is_javaclass(current_structdef) then
|
|
begin
|
|
{ nothing to do }
|
|
end
|
|
else
|
|
internalerror(200305105);
|
|
end;
|
|
current_settings.localswitches:=oldlocalswitches;
|
|
end;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
TCGProcInfo
|
|
****************************************************************************}
|
|
|
|
destructor tcgprocinfo.destroy;
|
|
begin
|
|
if assigned(code) then
|
|
code.free;
|
|
if not final_used then
|
|
final_asmnode.free;
|
|
inherited destroy;
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.printproc(pass:string);
|
|
begin
|
|
assign(printnodefile,treelogfilename);
|
|
{$push}{$I-}
|
|
append(printnodefile);
|
|
if ioresult<>0 then
|
|
rewrite(printnodefile);
|
|
{$pop}
|
|
if ioresult<>0 then
|
|
begin
|
|
Comment(V_Error,'Error creating '+treelogfilename);
|
|
exit;
|
|
end;
|
|
writeln(printnodefile);
|
|
writeln(printnodefile,'*******************************************************************************');
|
|
writeln(printnodefile, pass);
|
|
writeln(printnodefile,procdef.fullprocname(false));
|
|
writeln(printnodefile,'*******************************************************************************');
|
|
printnode(printnodefile,code);
|
|
close(printnodefile);
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.maybe_add_constructor_wrapper(var tocode: tnode; withexceptblock: boolean);
|
|
var
|
|
oldlocalswitches: tlocalswitches;
|
|
srsym: tsym;
|
|
afterconstructionblock,
|
|
exceptblock,
|
|
newblock: tblocknode;
|
|
newstatement: tstatementnode;
|
|
pd: tprocdef;
|
|
begin
|
|
if assigned(procdef.struct) and
|
|
(procdef.proctypeoption=potype_constructor) then
|
|
begin
|
|
withexceptblock:=
|
|
withexceptblock and
|
|
not(target_info.system in systems_garbage_collected_managed_types);
|
|
{ Don't test self and the vmt here. See generate_bodyexit_block }
|
|
{ why (JM) }
|
|
oldlocalswitches:=current_settings.localswitches;
|
|
current_settings.localswitches:=oldlocalswitches-[cs_check_object,cs_check_range];
|
|
|
|
{ call AfterConstruction for classes }
|
|
if is_class(procdef.struct) then
|
|
begin
|
|
srsym:=search_struct_member(procdef.struct,'AFTERCONSTRUCTION');
|
|
if assigned(srsym) and
|
|
(srsym.typ=procsym) then
|
|
begin
|
|
current_filepos:=exitpos;
|
|
afterconstructionblock:=internalstatements(newstatement);
|
|
{ first execute all constructor code. If no exception
|
|
occurred then we will execute afterconstruction,
|
|
otherwise we won't (the exception will jump over us) }
|
|
addstatement(newstatement,tocode);
|
|
{ if implicit finally node wasn't created, then exit label and
|
|
finalization code must be handled here and placed before
|
|
afterconstruction }
|
|
if not ((pi_needs_implicit_finally in flags) and
|
|
(cs_implicit_exceptions in current_settings.moduleswitches)) then
|
|
begin
|
|
include(tocode.flags,nf_block_with_exit);
|
|
addstatement(newstatement,final_asmnode);
|
|
final_used:=true;
|
|
end;
|
|
|
|
{ Self can be nil when fail is called }
|
|
{ if self<>nil and vmt<>nil then afterconstruction }
|
|
addstatement(newstatement,cifnode.create(
|
|
caddnode.create(andn,
|
|
caddnode.create(unequaln,
|
|
load_self_node,
|
|
cnilnode.create),
|
|
caddnode.create(unequaln,
|
|
load_vmt_pointer_node,
|
|
cnilnode.create)),
|
|
ccallnode.create(nil,tprocsym(srsym),srsym.owner,load_self_node,[]),
|
|
nil));
|
|
tocode:=afterconstructionblock;
|
|
end
|
|
else
|
|
internalerror(200305106);
|
|
end;
|
|
|
|
if withexceptblock and (procdef.struct.typ=objectdef) then
|
|
begin
|
|
{ Generate the implicit "fail" code for a constructor (destroy
|
|
in case an exception happened) }
|
|
pd:=tobjectdef(procdef.struct).find_destructor;
|
|
{ this will always be the case for classes, since tobject has
|
|
a destructor }
|
|
if assigned(pd) or is_object(procdef.struct) then
|
|
begin
|
|
current_filepos:=exitpos;
|
|
exceptblock:=internalstatements(newstatement);
|
|
{ first free the instance if non-nil }
|
|
if assigned(pd) then
|
|
{ if vmt<>0 then call destructor }
|
|
addstatement(newstatement,
|
|
cifnode.create(
|
|
caddnode.create(unequaln,
|
|
load_vmt_pointer_node,
|
|
cnilnode.create),
|
|
{ cnf_create_failed -> don't call BeforeDestruction }
|
|
ccallnode.create(nil,tprocsym(pd.procsym),pd.procsym.owner,load_self_node,[cnf_create_failed]),
|
|
nil))
|
|
else
|
|
{ object without destructor, call 'fail' helper }
|
|
addstatement(newstatement,
|
|
ccallnode.createintern('fpc_help_fail',
|
|
ccallparanode.create(
|
|
cordconstnode.create(tobjectdef(procdef.struct).vmt_offset,s32inttype,false),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_vmt_pointer_node,
|
|
voidpointertype),
|
|
ccallparanode.create(
|
|
ctypeconvnode.create_internal(
|
|
load_self_pointer_node,
|
|
voidpointertype),
|
|
nil))))
|
|
);
|
|
{ then re-raise the exception }
|
|
addstatement(newstatement,craisenode.create(nil,nil,nil));
|
|
current_filepos:=entrypos;
|
|
newblock:=internalstatements(newstatement);
|
|
{ try
|
|
tocode
|
|
except
|
|
exceptblock
|
|
end
|
|
}
|
|
addstatement(newstatement,ctryexceptnode.create(
|
|
tocode,
|
|
nil,
|
|
exceptblock));
|
|
tocode:=newblock;
|
|
end;
|
|
end;
|
|
current_settings.localswitches:=oldlocalswitches;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.add_entry_exit_code;
|
|
var
|
|
finalcode,
|
|
bodyentrycode,
|
|
bodyexitcode,
|
|
wrappedbody,
|
|
newblock : tnode;
|
|
codestatement,
|
|
newstatement : tstatementnode;
|
|
oldfilepos : tfileposinfo;
|
|
is_constructor: boolean;
|
|
begin
|
|
is_constructor:=assigned(procdef.struct) and
|
|
(procdef.proctypeoption=potype_constructor);
|
|
|
|
oldfilepos:=current_filepos;
|
|
{ Generate code/locations used at start of proc }
|
|
current_filepos:=entrypos;
|
|
entry_asmnode:=casmnode.create_get_position;
|
|
loadpara_asmnode:=casmnode.create_get_position;
|
|
stackcheck_asmnode:=casmnode.create_get_position;
|
|
init_asmnode:=casmnode.create_get_position;
|
|
bodyentrycode:=generate_bodyentry_block;
|
|
{ Generate code/locations used at end of proc }
|
|
current_filepos:=exitpos;
|
|
exitlabel_asmnode:=casmnode.create_get_position;
|
|
final_asmnode:=casmnode.create_get_position;
|
|
final_used:=false;
|
|
bodyexitcode:=generate_bodyexit_block;
|
|
|
|
{ Generate procedure by combining init+body+final,
|
|
depending on the implicit finally we need to add
|
|
an try...finally...end wrapper }
|
|
newblock:=internalstatements(newstatement);
|
|
{ initialization is common for all cases }
|
|
addstatement(newstatement,loadpara_asmnode);
|
|
addstatement(newstatement,stackcheck_asmnode);
|
|
addstatement(newstatement,entry_asmnode);
|
|
addstatement(newstatement,init_asmnode);
|
|
addstatement(newstatement,bodyentrycode);
|
|
|
|
if (cs_implicit_exceptions in current_settings.moduleswitches) and
|
|
(pi_needs_implicit_finally in flags) and
|
|
{ but it's useless in init/final code of units }
|
|
not(procdef.proctypeoption in [potype_unitfinalize,potype_unitinit]) and
|
|
not(po_assembler in procdef.procoptions) and
|
|
not(target_info.system in systems_garbage_collected_managed_types) then
|
|
begin
|
|
{ Any result of managed type must be returned in parameter }
|
|
if is_managed_type(procdef.returndef) and
|
|
(not paramanager.ret_in_param(procdef.returndef,procdef)) and
|
|
(not is_class(procdef.returndef)) then
|
|
InternalError(2013121301);
|
|
|
|
{ Generate special exception block only needed when
|
|
implicit finaly is used }
|
|
current_filepos:=exitpos;
|
|
{ Generate code that will be in the try...finally }
|
|
finalcode:=internalstatements(codestatement);
|
|
addstatement(codestatement,final_asmnode);
|
|
final_used:=true;
|
|
|
|
current_filepos:=entrypos;
|
|
wrappedbody:=ctryfinallynode.create_implicit(
|
|
code,
|
|
finalcode,
|
|
cnothingnode.create);
|
|
{ afterconstruction must be called after final_asmnode, because it
|
|
has to execute after the temps have been finalised in case of a
|
|
refcounted class (afterconstruction decreases the refcount
|
|
without freeing the instance if the count becomes nil, while
|
|
the finalising of the temps can free the instance) }
|
|
maybe_add_constructor_wrapper(wrappedbody,true);
|
|
addstatement(newstatement,wrappedbody);
|
|
addstatement(newstatement,exitlabel_asmnode);
|
|
addstatement(newstatement,bodyexitcode);
|
|
{ set flag the implicit finally has been generated }
|
|
include(flags,pi_has_implicit_finally);
|
|
end
|
|
else
|
|
begin
|
|
{ constructors need destroy-on-exception code even if they don't
|
|
have managed variables/temps }
|
|
maybe_add_constructor_wrapper(code,
|
|
cs_implicit_exceptions in current_settings.moduleswitches);
|
|
addstatement(newstatement,code);
|
|
if assigned(nestedexitlabel) then
|
|
addstatement(newstatement,clabelnode.create(cnothingnode.create,nestedexitlabel));
|
|
addstatement(newstatement,exitlabel_asmnode);
|
|
addstatement(newstatement,bodyexitcode);
|
|
if not is_constructor then
|
|
begin
|
|
addstatement(newstatement,final_asmnode);
|
|
final_used:=true;
|
|
end;
|
|
end;
|
|
do_firstpass(newblock);
|
|
code:=newblock;
|
|
current_filepos:=oldfilepos;
|
|
end;
|
|
|
|
|
|
procedure clearrefs(p:TObject;arg:pointer);
|
|
begin
|
|
if (tsym(p).typ in [localvarsym,paravarsym,staticvarsym]) then
|
|
if tabstractvarsym(p).refs>1 then
|
|
tabstractvarsym(p).refs:=1;
|
|
end;
|
|
|
|
|
|
procedure translate_registers(p:TObject;list:pointer);
|
|
begin
|
|
if (tsym(p).typ in [localvarsym,paravarsym,staticvarsym]) and
|
|
(tabstractnormalvarsym(p).localloc.loc in [LOC_REGISTER,LOC_CREGISTER,LOC_MMREGISTER,
|
|
LOC_CMMREGISTER,LOC_FPUREGISTER,LOC_CFPUREGISTER]) then
|
|
begin
|
|
if not(cs_no_regalloc in current_settings.globalswitches) then
|
|
begin
|
|
cg.translate_register(tabstractnormalvarsym(p).localloc.register);
|
|
if (tabstractnormalvarsym(p).localloc.registerhi<>NR_NO) then
|
|
cg.translate_register(tabstractnormalvarsym(p).localloc.registerhi);
|
|
end;
|
|
if cs_asm_source in current_settings.globalswitches then
|
|
begin
|
|
TAsmList(list).concat(Tai_comment.Create(strpnew('Var '+tabstractnormalvarsym(p).realname+' located in register '+
|
|
location_reg2string(tabstractnormalvarsym(p).localloc))));
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
const
|
|
exception_flags: array[boolean] of tprocinfoflags = (
|
|
[],
|
|
[pi_uses_exceptions,pi_needs_implicit_finally,pi_has_implicit_finally]
|
|
);
|
|
|
|
procedure tcgprocinfo.setup_tempgen;
|
|
begin
|
|
tg:=tgobjclass.create;
|
|
|
|
{$if defined(i386) or defined(x86_64) or defined(arm)}
|
|
{$if defined(arm)}
|
|
{ frame and stack pointer must be always the same on arm thumb so it makes no
|
|
sense to fiddle with a frame pointer }
|
|
if GenerateThumbCode then
|
|
begin
|
|
framepointer:=NR_STACK_POINTER_REG;
|
|
tg.direction:=1;
|
|
end
|
|
else
|
|
{$endif defined(arm)}
|
|
begin
|
|
{ try to strip the stack frame }
|
|
{ set the framepointer to esp if:
|
|
- no assembler directive, those are handled in assembler_block
|
|
in pstatment.pas (for cases not caught by the Delphi
|
|
exception below)
|
|
- no exceptions are used
|
|
- no pushes are used/esp modifications, could be:
|
|
* outgoing parameters on the stack on non-fixed stack target
|
|
* incoming parameters on the stack
|
|
* open arrays
|
|
- no inline assembler
|
|
or
|
|
- Delphi mode
|
|
- assembler directive
|
|
- no pushes are used/esp modifications, could be:
|
|
* outgoing parameters on the stack
|
|
* incoming parameters on the stack
|
|
* open arrays
|
|
- no local variables
|
|
|
|
- stack frame cannot be optimized if using Win64 SEH
|
|
(at least with the current state of our codegenerator).
|
|
}
|
|
if ((po_assembler in procdef.procoptions) and
|
|
(m_delphi in current_settings.modeswitches) and
|
|
{ localst at main_program_level is a staticsymtable }
|
|
(procdef.localst.symtablelevel<>main_program_level) and
|
|
(tabstractlocalsymtable(procdef.localst).count_locals = 0)) or
|
|
((cs_opt_stackframe in current_settings.optimizerswitches) and
|
|
not(cs_generate_stackframes in current_settings.localswitches) and
|
|
not(cs_profile in current_settings.moduleswitches) and
|
|
not(po_assembler in procdef.procoptions) and
|
|
not ((pi_has_stackparameter in flags)
|
|
{$ifndef arm} { Outgoing parameter(s) on stack do not need stackframe on x86 targets
|
|
with fixed stack. On ARM it fails, see bug #25050 }
|
|
and (not paramanager.use_fixed_stack)
|
|
{$endif arm}
|
|
) and
|
|
((flags*([pi_has_assembler_block,pi_is_assembler,
|
|
pi_needs_stackframe]+
|
|
exception_flags[(target_info.cpu=cpu_i386)
|
|
{$ifndef DISABLE_WIN64_SEH}
|
|
or (target_info.system=system_x86_64_win64)
|
|
{$endif DISABLE_WIN64_SEH}
|
|
]))=[])
|
|
)
|
|
then
|
|
begin
|
|
{ we need the parameter info here to determine if the procedure gets
|
|
parameters on the stack
|
|
|
|
calling generate_parameter_info doesn't hurt but it costs time
|
|
(necessary to init para_stack_size)
|
|
}
|
|
generate_parameter_info;
|
|
|
|
if not(procdef.stack_tainting_parameter(calleeside)) and
|
|
not(has_assembler_child) and (para_stack_size=0) then
|
|
begin
|
|
{ Only need to set the framepointer }
|
|
framepointer:=NR_STACK_POINTER_REG;
|
|
tg.direction:=1;
|
|
end
|
|
{$if defined(arm)}
|
|
{ On arm, the stack frame size can be estimated to avoid using an extra frame pointer,
|
|
in case parameters are passed on the stack.
|
|
|
|
However, the draw back is, if the estimation fails, compilation will break later on
|
|
with an internal error, so this switch is not enabled by default yet. To overcome this,
|
|
multipass compilation of subroutines must be supported
|
|
}
|
|
else if (cs_opt_forcenostackframe in current_settings.optimizerswitches) and
|
|
not(has_assembler_child) then
|
|
begin
|
|
{ Only need to set the framepointer }
|
|
framepointer:=NR_STACK_POINTER_REG;
|
|
tg.direction:=1;
|
|
include(flags,pi_estimatestacksize);
|
|
set_first_temp_offset;
|
|
procdef.has_paraloc_info:=callnoside;
|
|
generate_parameter_info;
|
|
exit;
|
|
end;
|
|
{$endif defined(arm)}
|
|
end;
|
|
end;
|
|
{$endif defined(x86) or defined(arm)}
|
|
{ set the start offset to the start of the temp area in the stack }
|
|
set_first_temp_offset;
|
|
end;
|
|
|
|
function tcgprocinfo.has_assembler_child : boolean;
|
|
var
|
|
hp : tprocinfo;
|
|
begin
|
|
result:=false;
|
|
hp:=get_first_nestedproc;
|
|
while assigned(hp) do
|
|
begin
|
|
if (hp.flags*[pi_has_assembler_block,pi_is_assembler])<>[] then
|
|
begin
|
|
result:=true;
|
|
exit;
|
|
end;
|
|
hp:=tprocinfo(hp.next);
|
|
end;
|
|
end;
|
|
|
|
procedure tcgprocinfo.generate_code_tree;
|
|
var
|
|
hpi : tcgprocinfo;
|
|
begin
|
|
{ generate code for this procedure }
|
|
generate_code;
|
|
{ process nested procedures }
|
|
hpi:=tcgprocinfo(get_first_nestedproc);
|
|
while assigned(hpi) do
|
|
begin
|
|
hpi.generate_code_tree;
|
|
hpi:=tcgprocinfo(hpi.next);
|
|
end;
|
|
resetprocdef;
|
|
end;
|
|
|
|
{ For SEH, the code from 'finally' blocks must be put into a separate procedures,
|
|
which can be called by OS during stack unwind. This resembles nested procedures,
|
|
but finalizer procedures do not have their own local variables and work directly
|
|
with the stack frame of parent. In particular, the tempgen must be shared, so
|
|
1) finalizer procedure is able to finalize temps of the parent,
|
|
2) if the finalizer procedure is complex enough to need its own temps, they are
|
|
allocated in stack frame of parent, so second-level finalizer procedures are
|
|
not needed.
|
|
|
|
Due to requirement of shared tempgen we cannot process finalizer as a regular nested
|
|
procedure (after the parent) and have to do it inline.
|
|
This is called by platform-specific tryfinallynodes during pass2.
|
|
Here we put away the codegen (which carries the register allocator state), process
|
|
the 'nested' procedure, then restore previous cg and continue processing the parent
|
|
procedure. generate_code() will create another cg, but not another tempgen because
|
|
setup_tempgen() is not called for potype_exceptfilter procedures. }
|
|
|
|
procedure tcgprocinfo.generate_exceptfilter(nestedpi: tcgprocinfo);
|
|
var
|
|
saved_cg: tcg;
|
|
saved_hlcg: thlcgobj;
|
|
{$ifdef cpu64bitalu}
|
|
saved_cg128 : tcg128;
|
|
{$else cpu64bitalu}
|
|
saved_cg64 : tcg64;
|
|
{$endif cpu64bitalu}
|
|
begin
|
|
if nestedpi.procdef.proctypeoption<>potype_exceptfilter then
|
|
InternalError(201201141);
|
|
{ flush code generated this far }
|
|
aktproccode.concatlist(current_asmdata.CurrAsmList);
|
|
{ save the codegen }
|
|
saved_cg:=cg;
|
|
saved_hlcg:=hlcg;
|
|
cg:=nil;
|
|
hlcg:=nil;
|
|
{$ifdef cpu64bitalu}
|
|
saved_cg128:=cg128;
|
|
cg128:=nil;
|
|
{$else cpu64bitalu}
|
|
saved_cg64:=cg64;
|
|
cg64:=nil;
|
|
{$endif cpu64bitalu}
|
|
nestedpi.generate_code;
|
|
{ prevents generating code the second time when processing nested procedures }
|
|
nestedpi.resetprocdef;
|
|
cg:=saved_cg;
|
|
hlcg:=saved_hlcg;
|
|
{$ifdef cpu64bitalu}
|
|
cg128:=saved_cg128;
|
|
{$else cpu64bitalu}
|
|
cg64:=saved_cg64;
|
|
{$endif cpu64bitalu}
|
|
add_reg_instruction_hook:=@cg.add_reg_instruction;
|
|
end;
|
|
|
|
|
|
procedure TCGProcinfo.CreateInlineInfo;
|
|
begin
|
|
new(procdef.inlininginfo);
|
|
procdef.inlininginfo^.code:=code.getcopy;
|
|
procdef.inlininginfo^.flags:=flags;
|
|
{ The blocknode needs to set an exit label }
|
|
if procdef.inlininginfo^.code.nodetype=blockn then
|
|
include(procdef.inlininginfo^.code.flags,nf_block_with_exit);
|
|
procdef.has_inlininginfo:=true;
|
|
end;
|
|
|
|
|
|
function searchusercode(var n: tnode; arg: pointer): foreachnoderesult;
|
|
begin
|
|
if nf_usercode_entry in n.flags then
|
|
begin
|
|
pnode(arg)^:=n;
|
|
result:=fen_norecurse_true
|
|
end
|
|
else
|
|
result:=fen_false;
|
|
end;
|
|
|
|
|
|
function TCGProcinfo.GetUserCode : tnode;
|
|
var
|
|
n : tnode;
|
|
begin
|
|
n:=nil;
|
|
foreachnodestatic(code,@searchusercode,@n);
|
|
if not(assigned(n)) then
|
|
internalerror(2013111004);
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.generate_code;
|
|
var
|
|
old_current_procinfo : tprocinfo;
|
|
oldmaxfpuregisters : longint;
|
|
oldfilepos : tfileposinfo;
|
|
old_current_structdef : tabstractrecorddef;
|
|
templist : TAsmList;
|
|
headertai : tai;
|
|
i : integer;
|
|
varsym : tabstractnormalvarsym;
|
|
{RedoDFA : boolean;}
|
|
begin
|
|
{ the initialization procedure can be empty, then we
|
|
don't need to generate anything. When it was an empty
|
|
procedure there would be at least a blocknode }
|
|
if not assigned(code) then
|
|
exit;
|
|
|
|
{ We need valid code }
|
|
if Errorcount<>0 then
|
|
exit;
|
|
|
|
{ No code can be generated for generic template }
|
|
if (df_generic in procdef.defoptions) then
|
|
internalerror(200511152);
|
|
|
|
{ For regular procedures the RA and Tempgen shall not be available yet,
|
|
but exception filters reuse Tempgen of parent }
|
|
if assigned(tg)<>(procdef.proctypeoption=potype_exceptfilter) then
|
|
internalerror(200309201);
|
|
|
|
old_current_procinfo:=current_procinfo;
|
|
oldfilepos:=current_filepos;
|
|
old_current_structdef:=current_structdef;
|
|
oldmaxfpuregisters:=current_settings.maxfpuregisters;
|
|
|
|
current_procinfo:=self;
|
|
current_filepos:=entrypos;
|
|
current_structdef:=procdef.struct;
|
|
|
|
{ store start of user code, it must be a block node, it will be used later one to
|
|
check variable lifeness }
|
|
include(code.flags,nf_usercode_entry);
|
|
|
|
{ add wrapping code if necessary (initialization of typed constants on
|
|
some platforms, initing of local variables and out parameters with
|
|
trashing values, ...) }
|
|
{ init/final code must be wrapped later (after code for main proc body
|
|
has been generated) }
|
|
if not(current_procinfo.procdef.proctypeoption in [potype_unitinit,potype_unitfinalize]) then
|
|
code:=cnodeutils.wrap_proc_body(procdef,code);
|
|
|
|
{ automatic inlining? }
|
|
if (cs_opt_autoinline in current_settings.optimizerswitches) and
|
|
{ inlining not turned off? }
|
|
(cs_do_inline in current_settings.localswitches) and
|
|
{ no inlining yet? }
|
|
not(procdef.has_inlininginfo) and not(has_nestedprocs) and
|
|
not(procdef.proctypeoption in [potype_proginit,potype_unitinit,potype_unitfinalize,potype_constructor,
|
|
potype_destructor,potype_class_constructor,potype_class_destructor]) and
|
|
((procdef.procoptions*[po_exports,po_external,po_interrupt,po_virtualmethod,po_iocheck])=[]) and
|
|
(not(procdef.proccalloption in [pocall_safecall])) and
|
|
{ rough approximation if we should auto inline }
|
|
(node_count(code)<=10) then
|
|
begin
|
|
{ Can we inline this procedure? }
|
|
if checknodeinlining(procdef) then
|
|
begin
|
|
Message1(cg_d_autoinlining,procdef.GetTypeName);
|
|
include(procdef.procoptions,po_inline);
|
|
CreateInlineInfo;
|
|
end;
|
|
end;
|
|
|
|
templist:=TAsmList.create;
|
|
|
|
{ add parast/localst to symtablestack }
|
|
add_to_symtablestack;
|
|
|
|
{ clear register count }
|
|
procdef.localst.SymList.ForEachCall(@clearrefs,nil);
|
|
procdef.parast.SymList.ForEachCall(@clearrefs,nil);
|
|
|
|
{ there's always a call to FPC_INITIALIZEUNITS/FPC_DO_EXIT in the main program }
|
|
if (procdef.localst.symtablelevel=main_program_level) and
|
|
(not current_module.is_unit) then
|
|
include(flags,pi_do_call);
|
|
|
|
{ set implicit_finally flag when there are locals/paras to be finalized }
|
|
procdef.parast.SymList.ForEachCall(@check_finalize_paras,nil);
|
|
procdef.localst.SymList.ForEachCall(@check_finalize_locals,nil);
|
|
|
|
{$ifdef SUPPORT_SAFECALL}
|
|
{ set implicit_finally flag for if procedure is safecall }
|
|
if (tf_safecall_exceptions in target_info.flags) and
|
|
(procdef.proccalloption=pocall_safecall) then
|
|
include(flags, pi_needs_implicit_finally);
|
|
{$endif}
|
|
{ firstpass everything }
|
|
flowcontrol:=[];
|
|
do_firstpass(code);
|
|
|
|
{$if defined(i386) or defined(i8086)}
|
|
procdef.fpu_used:=node_resources_fpu(code);
|
|
if procdef.fpu_used>0 then
|
|
include(flags,pi_uses_fpu);
|
|
{$endif i386 or i8086}
|
|
|
|
{ Print the node to tree.log }
|
|
if paraprintnodetree=1 then
|
|
printproc( 'after the firstpass');
|
|
|
|
{ do this before adding the entry code else the tail recursion recognition won't work,
|
|
if this causes troubles, it must be if'ed
|
|
}
|
|
if (cs_opt_tailrecursion in current_settings.optimizerswitches) and
|
|
(pi_is_recursive in flags) then
|
|
do_opttail(code,procdef);
|
|
|
|
if cs_opt_constant_propagate in current_settings.optimizerswitches then
|
|
do_optconstpropagate(code);
|
|
|
|
if (cs_opt_nodedfa in current_settings.optimizerswitches) and
|
|
{ creating dfa is not always possible }
|
|
((flags*[pi_has_assembler_block,pi_uses_exceptions,pi_is_assembler])=[]) then
|
|
begin
|
|
dfabuilder:=TDFABuilder.Create;
|
|
dfabuilder.createdfainfo(code);
|
|
include(flags,pi_dfaavailable);
|
|
|
|
{ when life info is available, we can give more sophisticated warning about uninitialized
|
|
variables ...
|
|
... but not for the finalization section of a unit, we would need global dfa to handle
|
|
it properly }
|
|
if potype_unitfinalize<>procdef.proctypeoption then
|
|
{ iterate through life info of the first node }
|
|
for i:=0 to dfabuilder.nodemap.count-1 do
|
|
begin
|
|
if DFASetIn(GetUserCode.optinfo^.life,i) then
|
|
CheckAndWarn(GetUserCode,tnode(dfabuilder.nodemap[i]));
|
|
end;
|
|
end;
|
|
|
|
if (pi_dfaavailable in flags) and (cs_opt_dead_store_eliminate in current_settings.optimizerswitches) then
|
|
do_optdeadstoreelim(code);
|
|
|
|
if (cs_opt_loopstrength in current_settings.optimizerswitches)
|
|
{ our induction variable strength reduction doesn't like
|
|
for loops with more than one entry }
|
|
and not(pi_has_label in flags) then
|
|
begin
|
|
{RedoDFA:=}OptimizeInductionVariables(code);
|
|
end;
|
|
|
|
if (cs_opt_remove_emtpy_proc in current_settings.optimizerswitches) and
|
|
(procdef.proctypeoption in [potype_operator,potype_procedure,potype_function]) and
|
|
(code.nodetype=blockn) and (tblocknode(code).statements=nil) then
|
|
procdef.isempty:=true;
|
|
|
|
{ add implicit entry and exit code }
|
|
add_entry_exit_code;
|
|
|
|
if cs_opt_nodecse in current_settings.optimizerswitches then
|
|
do_optcse(code);
|
|
|
|
{ only do secondpass if there are no errors }
|
|
if (ErrorCount=0) then
|
|
begin
|
|
create_hlcodegen;
|
|
|
|
if (procdef.proctypeoption<>potype_exceptfilter) then
|
|
setup_tempgen;
|
|
|
|
{ Create register allocator, must come after framepointer is known }
|
|
hlcg.init_register_allocators;
|
|
|
|
generate_parameter_info;
|
|
|
|
{ allocate got register if needed }
|
|
allocate_got_register(aktproccode);
|
|
|
|
{ Allocate space in temp/registers for parast and localst }
|
|
current_filepos:=entrypos;
|
|
gen_alloc_symtable(aktproccode,procdef,procdef.parast);
|
|
gen_alloc_symtable(aktproccode,procdef,procdef.localst);
|
|
|
|
{ Store temp offset for information about 'real' temps }
|
|
tempstart:=tg.lasttemp;
|
|
|
|
{ Generate code to load register parameters in temps and insert local
|
|
copies for values parameters. This must be done before the code for the
|
|
body is generated because the localloc is updated.
|
|
Note: The generated code will be inserted after the code generation of
|
|
the body is finished, because only then the position is known }
|
|
{$ifdef oldregvars}
|
|
assign_regvars(code);
|
|
{$endif oldreg}
|
|
current_filepos:=entrypos;
|
|
|
|
hlcg.gen_load_para_value(templist);
|
|
|
|
{ caller paraloc info is also necessary in the stackframe_entry
|
|
code of the ppc (and possibly other processors) }
|
|
procdef.init_paraloc_info(callerside);
|
|
|
|
{ generate code for the node tree }
|
|
do_secondpass(code);
|
|
aktproccode.concatlist(current_asmdata.CurrAsmList);
|
|
|
|
{ The position of the loadpara_asmnode is now known }
|
|
aktproccode.insertlistafter(loadpara_asmnode.currenttai,templist);
|
|
|
|
{ first generate entry and initialize code with the correct
|
|
position and switches }
|
|
current_filepos:=entrypos;
|
|
current_settings.localswitches:=entryswitches;
|
|
|
|
cg.set_regalloc_live_range_direction(rad_backwards);
|
|
|
|
hlcg.gen_entry_code(templist);
|
|
aktproccode.insertlistafter(entry_asmnode.currenttai,templist);
|
|
hlcg.gen_initialize_code(templist);
|
|
aktproccode.insertlistafter(init_asmnode.currenttai,templist);
|
|
|
|
{ now generate finalize and exit code with the correct position
|
|
and switches }
|
|
current_filepos:=exitpos;
|
|
current_settings.localswitches:=exitswitches;
|
|
|
|
cg.set_regalloc_live_range_direction(rad_forward);
|
|
|
|
if assigned(finalize_procinfo) then
|
|
generate_exceptfilter(tcgprocinfo(finalize_procinfo))
|
|
else
|
|
begin
|
|
hlcg.gen_finalize_code(templist);
|
|
{ the finalcode must be concated if there was no position available,
|
|
using insertlistafter will result in an insert at the start
|
|
when currentai=nil }
|
|
if assigned(final_asmnode) and assigned(final_asmnode.currenttai) then
|
|
aktproccode.insertlistafter(final_asmnode.currenttai,templist)
|
|
else
|
|
aktproccode.concatlist(templist);
|
|
end;
|
|
{ insert exit label at the correct position }
|
|
hlcg.a_label(templist,CurrExitLabel);
|
|
if assigned(exitlabel_asmnode.currenttai) then
|
|
aktproccode.insertlistafter(exitlabel_asmnode.currenttai,templist)
|
|
else
|
|
aktproccode.concatlist(templist);
|
|
{ exit code }
|
|
hlcg.gen_exit_code(templist);
|
|
aktproccode.concatlist(templist);
|
|
|
|
{$ifdef OLDREGVARS}
|
|
{ note: this must be done only after as much code as possible has }
|
|
{ been generated. The result is that when you ungetregister() a }
|
|
{ regvar, it will actually free the regvar (and alse free the }
|
|
{ the regvars at the same time). Doing this too early will }
|
|
{ confuse the register allocator, as the regvars will still be }
|
|
{ used. It should be done before loading the result regs (so }
|
|
{ they don't conflict with the regvars) and before }
|
|
{ gen_entry_code (that one has to be able to allocate the }
|
|
{ regvars again) (JM) }
|
|
free_regvars(aktproccode);
|
|
{$endif OLDREGVARS}
|
|
|
|
{ generate symbol and save end of header position }
|
|
current_filepos:=entrypos;
|
|
hlcg.gen_proc_symbol(templist);
|
|
headertai:=tai(templist.last);
|
|
{ insert symbol }
|
|
aktproccode.insertlist(templist);
|
|
|
|
{ Free space in temp/registers for parast and localst, must be
|
|
done after gen_entry_code }
|
|
current_filepos:=exitpos;
|
|
|
|
{ make sure the got/pic register doesn't get freed in the }
|
|
{ middle of a loop }
|
|
if (cs_create_pic in current_settings.moduleswitches) and
|
|
(pi_needs_got in flags) and
|
|
(got<>NR_NO) then
|
|
cg.a_reg_sync(aktproccode,got);
|
|
|
|
gen_free_symtable(aktproccode,procdef.localst);
|
|
gen_free_symtable(aktproccode,procdef.parast);
|
|
|
|
{ add code that will load the return value, this is not done
|
|
for assembler routines when they didn't reference the result
|
|
variable }
|
|
hlcg.gen_load_return_value(templist);
|
|
aktproccode.concatlist(templist);
|
|
|
|
{ Already reserve all registers for stack checking code and
|
|
generate the call to the helper function }
|
|
if not(tf_no_generic_stackcheck in target_info.flags) and
|
|
(cs_check_stack in entryswitches) and
|
|
not(po_assembler in procdef.procoptions) and
|
|
(procdef.proctypeoption<>potype_proginit) then
|
|
begin
|
|
current_filepos:=entrypos;
|
|
gen_stack_check_call(templist);
|
|
aktproccode.insertlistafter(stackcheck_asmnode.currenttai,templist)
|
|
end;
|
|
|
|
{ this code (got loading) comes before everything which has }
|
|
{ already been generated, so reset the info about already }
|
|
{ backwards extended registers (so their live range can be }
|
|
{ extended backwards even further if needed) }
|
|
{ This code must be }
|
|
{ a) generated after do_secondpass has been called }
|
|
{ (because pi_needs_got may be set there) }
|
|
{ b) generated before register allocation, because the }
|
|
{ got/pic register can be a virtual one }
|
|
{ c) inserted before the entry code, because the entry }
|
|
{ code may need global symbols such as init rtti }
|
|
{ d) inserted after the stackframe allocation, because }
|
|
{ this register may have to be spilled }
|
|
cg.set_regalloc_live_range_direction(rad_backwards_reinit);
|
|
current_filepos:=entrypos;
|
|
{ load got if necessary }
|
|
cg.g_maybe_got_init(templist);
|
|
|
|
aktproccode.insertlistafter(headertai,templist);
|
|
|
|
{ re-enable if more code at the end is ever generated here
|
|
cg.set_regalloc_live_range_direction(rad_forward);
|
|
}
|
|
|
|
|
|
{$ifndef NoOpt}
|
|
{$ifndef i386}
|
|
if (cs_opt_scheduler in current_settings.optimizerswitches) and
|
|
{ do not optimize pure assembler procedures }
|
|
not(pi_is_assembler in flags) then
|
|
preregallocschedule(aktproccode);
|
|
{$endif i386}
|
|
{$endif NoOpt}
|
|
|
|
{ The procedure body is finished, we can now
|
|
allocate the registers }
|
|
cg.do_register_allocation(aktproccode,headertai);
|
|
|
|
{ translate imag. register to their real counter parts
|
|
this is necessary for debuginfo and verbose assembler output
|
|
when SSA will be implented, this will be more complicated because we've to
|
|
maintain location lists }
|
|
procdef.parast.SymList.ForEachCall(@translate_registers,templist);
|
|
procdef.localst.SymList.ForEachCall(@translate_registers,templist);
|
|
if (cs_create_pic in current_settings.moduleswitches) and
|
|
(pi_needs_got in flags) and
|
|
not(cs_no_regalloc in current_settings.globalswitches) and
|
|
(got<>NR_NO) then
|
|
cg.translate_register(got);
|
|
|
|
{ Add save and restore of used registers }
|
|
current_filepos:=entrypos;
|
|
gen_save_used_regs(templist);
|
|
{ Remember the last instruction of register saving block
|
|
(may be =nil for e.g. assembler procedures) }
|
|
endprologue_ai:=templist.last;
|
|
aktproccode.insertlistafter(headertai,templist);
|
|
current_filepos:=exitpos;
|
|
gen_restore_used_regs(aktproccode);
|
|
{ We know the size of the stack, now we can generate the
|
|
parameter that is passed to the stack checking code }
|
|
if not(tf_no_generic_stackcheck in target_info.flags) and
|
|
(cs_check_stack in entryswitches) and
|
|
not(po_assembler in procdef.procoptions) and
|
|
(procdef.proctypeoption<>potype_proginit) then
|
|
begin
|
|
current_filepos:=entrypos;
|
|
gen_stack_check_size_para(templist);
|
|
aktproccode.insertlistafter(stackcheck_asmnode.currenttai,templist)
|
|
end;
|
|
{ Add entry code (stack allocation) after header }
|
|
current_filepos:=entrypos;
|
|
gen_proc_entry_code(templist);
|
|
aktproccode.insertlistafter(headertai,templist);
|
|
{$ifdef SUPPORT_SAFECALL}
|
|
{ Set return value of safecall procedure if implicit try/finally blocks are disabled }
|
|
if not (cs_implicit_exceptions in current_settings.moduleswitches) and
|
|
(tf_safecall_exceptions in target_info.flags) and
|
|
(procdef.proccalloption=pocall_safecall) then
|
|
cg.a_load_const_reg(aktproccode,OS_ADDR,0,NR_FUNCTION_RETURN_REG);
|
|
{$endif}
|
|
{ Add exit code at the end }
|
|
current_filepos:=exitpos;
|
|
gen_proc_exit_code(templist);
|
|
aktproccode.concatlist(templist);
|
|
|
|
{ check if the implicit finally has been generated. The flag
|
|
should already be set in pass1 }
|
|
if (cs_implicit_exceptions in current_settings.moduleswitches) and
|
|
not(procdef.proctypeoption in [potype_unitfinalize,potype_unitinit]) and
|
|
(pi_needs_implicit_finally in flags) and
|
|
not(po_assembler in procdef.procoptions) and
|
|
not(pi_has_implicit_finally in flags) and
|
|
not(target_info.system in systems_garbage_collected_managed_types) then
|
|
internalerror(200405231);
|
|
|
|
{$ifndef NoOpt}
|
|
if not(cs_no_regalloc in current_settings.globalswitches) then
|
|
begin
|
|
if (cs_opt_level1 in current_settings.optimizerswitches) and
|
|
{ do not optimize pure assembler procedures }
|
|
not(pi_is_assembler in flags) then
|
|
optimize(aktproccode);
|
|
{$ifndef i386}
|
|
{ schedule after assembler optimization, it could have brought up
|
|
new schedule possibilities }
|
|
if (cs_opt_scheduler in current_settings.optimizerswitches) and
|
|
{ do not optimize pure assembler procedures }
|
|
not(pi_is_assembler in flags) then
|
|
preregallocschedule(aktproccode);
|
|
{$endif i386}
|
|
end;
|
|
{$endif NoOpt}
|
|
|
|
|
|
{$ifdef ARM}
|
|
{ because of the limited constant size of the arm, all data access is done pc relative }
|
|
finalizearmcode(aktproccode,aktlocaldata);
|
|
{$endif ARM}
|
|
|
|
{$ifdef AVR}
|
|
{ because of the limited branch distance of cond. branches, they must be replaced
|
|
sometimes by normal jmps and an inverse branch }
|
|
finalizeavrcode(aktproccode);
|
|
{$endif AVR}
|
|
|
|
{ Add end symbol and debug info }
|
|
{ this must be done after the pcrelativedata is appended else the distance calculation of
|
|
insertpcrelativedata will be wrong, further the pc indirect data is part of the procedure
|
|
so it should be inserted before the end symbol (FK)
|
|
}
|
|
current_filepos:=exitpos;
|
|
hlcg.gen_proc_symbol_end(templist);
|
|
aktproccode.concatlist(templist);
|
|
{$ifdef fpc_compiler_has_fixup_jmps}
|
|
fixup_jmps(aktproccode);
|
|
{$endif}
|
|
{ insert line debuginfo }
|
|
if (cs_debuginfo in current_settings.moduleswitches) or
|
|
(cs_use_lineinfo in current_settings.globalswitches) then
|
|
current_debuginfo.insertlineinfo(aktproccode);
|
|
|
|
hlcg.record_generated_code_for_procdef(current_procinfo.procdef,aktproccode,aktlocaldata);
|
|
|
|
{ only now we can remove the temps }
|
|
if (procdef.proctypeoption<>potype_exceptfilter) then
|
|
begin
|
|
tg.resettempgen;
|
|
tg.free;
|
|
tg:=nil;
|
|
end;
|
|
{ stop tempgen and ra }
|
|
hlcg.done_register_allocators;
|
|
destroy_hlcodegen;
|
|
end;
|
|
|
|
dfabuilder.free;
|
|
|
|
{ restore symtablestack }
|
|
remove_from_symtablestack;
|
|
|
|
{ restore }
|
|
templist.free;
|
|
current_settings.maxfpuregisters:=oldmaxfpuregisters;
|
|
current_filepos:=oldfilepos;
|
|
current_structdef:=old_current_structdef;
|
|
current_procinfo:=old_current_procinfo;
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.add_to_symtablestack;
|
|
begin
|
|
{ insert symtables for the class, but only if it is no nested function }
|
|
if assigned(procdef.struct) and
|
|
not(assigned(parent) and
|
|
assigned(parent.procdef) and
|
|
assigned(parent.procdef.struct)) then
|
|
push_nested_hierarchy(procdef.struct);
|
|
|
|
{ insert parasymtable in symtablestack when parsing
|
|
a function }
|
|
if procdef.parast.symtablelevel>=normal_function_level then
|
|
symtablestack.push(procdef.parast);
|
|
|
|
{ insert localsymtable, except for the main procedure
|
|
(in that case the localst is the unit's static symtable,
|
|
which is already on the stack) }
|
|
if procdef.localst.symtablelevel>=normal_function_level then
|
|
symtablestack.push(procdef.localst);
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.remove_from_symtablestack;
|
|
begin
|
|
{ remove localsymtable }
|
|
if procdef.localst.symtablelevel>=normal_function_level then
|
|
symtablestack.pop(procdef.localst);
|
|
|
|
{ remove parasymtable }
|
|
if procdef.parast.symtablelevel>=normal_function_level then
|
|
symtablestack.pop(procdef.parast);
|
|
|
|
{ remove symtables for the class, but only if it is no nested function }
|
|
if assigned(procdef.struct) and
|
|
not(assigned(parent) and
|
|
assigned(parent.procdef) and
|
|
assigned(parent.procdef.struct)) then
|
|
pop_nested_hierarchy(procdef.struct);
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.resetprocdef;
|
|
begin
|
|
{ remove code tree, if not inline procedure }
|
|
if assigned(code) then
|
|
begin
|
|
{ the inline procedure has already got a copy of the tree
|
|
stored in procdef.inlininginfo }
|
|
code.free;
|
|
code:=nil;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgprocinfo.parse_body;
|
|
var
|
|
old_current_procinfo : tprocinfo;
|
|
old_block_type : tblock_type;
|
|
st : TSymtable;
|
|
old_current_structdef: tabstractrecorddef;
|
|
old_current_genericdef,
|
|
old_current_specializedef: tstoreddef;
|
|
old_parse_generic: boolean;
|
|
|
|
begin
|
|
old_current_procinfo:=current_procinfo;
|
|
old_block_type:=block_type;
|
|
old_current_structdef:=current_structdef;
|
|
old_current_genericdef:=current_genericdef;
|
|
old_current_specializedef:=current_specializedef;
|
|
old_parse_generic:=parse_generic;
|
|
|
|
current_procinfo:=self;
|
|
current_structdef:=procdef.struct;
|
|
if assigned(current_structdef) and (df_generic in current_structdef.defoptions) then
|
|
begin
|
|
current_genericdef:=current_structdef;
|
|
parse_generic:=true;
|
|
end;
|
|
if assigned(current_structdef) and (df_specialization in current_structdef.defoptions) then
|
|
current_specializedef:=current_structdef;
|
|
|
|
{ calculate the lexical level }
|
|
if procdef.parast.symtablelevel>maxnesting then
|
|
Message(parser_e_too_much_lexlevel);
|
|
block_type:=bt_body;
|
|
|
|
{$ifdef state_tracking}
|
|
{ aktstate:=Tstate_storage.create;}
|
|
{$endif state_tracking}
|
|
|
|
{ allocate the symbol for this procedure }
|
|
alloc_proc_symbol(procdef);
|
|
|
|
{ add parast/localst to symtablestack }
|
|
add_to_symtablestack;
|
|
|
|
{ save entry info }
|
|
entrypos:=current_filepos;
|
|
entryswitches:=current_settings.localswitches;
|
|
|
|
if (df_generic in procdef.defoptions) then
|
|
begin
|
|
{ start token recorder for generic template }
|
|
procdef.initgeneric;
|
|
current_scanner.startrecordtokens(procdef.generictokenbuf);
|
|
end;
|
|
|
|
{ parse the code ... }
|
|
code:=block(current_module.islibrary);
|
|
|
|
if (df_generic in procdef.defoptions) then
|
|
begin
|
|
{ stop token recorder for generic template }
|
|
current_scanner.stoprecordtokens;
|
|
|
|
{ Give an error for accesses in the static symtable that aren't visible
|
|
outside the current unit }
|
|
st:=procdef.owner;
|
|
while (st.symtabletype=ObjectSymtable) do
|
|
st:=st.defowner.owner;
|
|
if (pi_uses_static_symtable in flags) and
|
|
(st.symtabletype<>staticsymtable) then
|
|
Comment(V_Error,'Global Generic template references static symtable');
|
|
end;
|
|
|
|
{ save exit info }
|
|
exitswitches:=current_settings.localswitches;
|
|
exitpos:=last_endtoken_filepos;
|
|
|
|
{ the procedure is now defined }
|
|
procdef.forwarddef:=false;
|
|
|
|
if assigned(code) then
|
|
begin
|
|
{ get a better entry point }
|
|
entrypos:=code.fileinfo;
|
|
|
|
{ Finish type checking pass }
|
|
do_typecheckpass(code);
|
|
|
|
if assigned(procdef.parentfpinitblock) then
|
|
begin
|
|
tblocknode(code).left:=cstatementnode.create(procdef.parentfpinitblock,tblocknode(code).left);
|
|
do_typecheckpass(tblocknode(code).left);
|
|
procdef.parentfpinitblock:=nil;
|
|
end;
|
|
|
|
end;
|
|
|
|
{ Check for unused labels, forwards, symbols for procedures. Static
|
|
symtable is checked in pmodules.
|
|
The check must be done after the typecheckpass }
|
|
if (Errorcount=0) and
|
|
(tstoredsymtable(procdef.localst).symtabletype<>staticsymtable) then
|
|
begin
|
|
{ check if forwards are resolved }
|
|
tstoredsymtable(procdef.localst).check_forwards;
|
|
{ check if all labels are used }
|
|
tstoredsymtable(procdef.localst).checklabels;
|
|
{ check for unused symbols, but only if there is no asm block }
|
|
if not(pi_has_assembler_block in flags) then
|
|
begin
|
|
tstoredsymtable(procdef.localst).allsymbolsused;
|
|
tstoredsymtable(procdef.parast).allsymbolsused;
|
|
end;
|
|
end;
|
|
|
|
if (po_inline in procdef.procoptions) and
|
|
{ Can we inline this procedure? }
|
|
checknodeinlining(procdef) then
|
|
CreateInlineInfo;
|
|
|
|
{ Print the node to tree.log }
|
|
if paraprintnodetree=1 then
|
|
printproc( 'after parsing');
|
|
|
|
{ ... remove symbol tables }
|
|
remove_from_symtablestack;
|
|
|
|
{$ifdef state_tracking}
|
|
{ aktstate.destroy;}
|
|
{$endif state_tracking}
|
|
|
|
current_structdef:=old_current_structdef;
|
|
current_genericdef:=old_current_genericdef;
|
|
current_specializedef:=old_current_specializedef;
|
|
current_procinfo:=old_current_procinfo;
|
|
parse_generic:=old_parse_generic;
|
|
|
|
{ Restore old state }
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
PROCEDURE/FUNCTION PARSING
|
|
****************************************************************************}
|
|
|
|
|
|
procedure check_init_paras(p:TObject;arg:pointer);
|
|
begin
|
|
if tsym(p).typ<>paravarsym then
|
|
exit;
|
|
with tparavarsym(p) do
|
|
if (is_managed_type(vardef) and
|
|
(varspez in [vs_value,vs_out])) or
|
|
(is_shortstring(vardef) and
|
|
(varspez=vs_value)) then
|
|
include(current_procinfo.flags,pi_do_call);
|
|
end;
|
|
|
|
|
|
|
|
procedure read_proc_body(old_current_procinfo:tprocinfo;pd:tprocdef);
|
|
{
|
|
Parses the procedure directives, then parses the procedure body, then
|
|
generates the code for it
|
|
}
|
|
|
|
var
|
|
oldfailtokenmode : tmodeswitches;
|
|
isnestedproc : boolean;
|
|
begin
|
|
Message1(parser_d_procedure_start,pd.fullprocname(false));
|
|
oldfailtokenmode:=[];
|
|
|
|
{ create a new procedure }
|
|
current_procinfo:=cprocinfo.create(old_current_procinfo);
|
|
current_module.procinfo:=current_procinfo;
|
|
current_procinfo.procdef:=pd;
|
|
isnestedproc:=(current_procinfo.procdef.parast.symtablelevel>normal_function_level);
|
|
|
|
{ Insert mangledname }
|
|
pd.aliasnames.insert(pd.mangledname);
|
|
|
|
{ Handle Export of this procedure }
|
|
if (po_exports in pd.procoptions) and
|
|
(target_info.system in [system_i386_os2,system_i386_emx]) then
|
|
begin
|
|
pd.aliasnames.insert(pd.procsym.realname);
|
|
if cs_link_deffile in current_settings.globalswitches then
|
|
deffile.AddExport(pd.mangledname);
|
|
end;
|
|
|
|
{ Insert result variables in the localst }
|
|
insert_funcret_local(pd);
|
|
|
|
{ check if there are para's which require initing -> set }
|
|
{ pi_do_call (if not yet set) }
|
|
if not(pi_do_call in current_procinfo.flags) then
|
|
pd.parast.SymList.ForEachCall(@check_init_paras,nil);
|
|
|
|
{ set _FAIL as keyword if constructor }
|
|
if (pd.proctypeoption=potype_constructor) then
|
|
begin
|
|
oldfailtokenmode:=tokeninfo^[_FAIL].keyword;
|
|
tokeninfo^[_FAIL].keyword:=alllanguagemodes;
|
|
end;
|
|
|
|
tcgprocinfo(current_procinfo).parse_body;
|
|
|
|
{ We can't support inlining for procedures that have nested
|
|
procedures because the nested procedures use a fixed offset
|
|
for accessing locals in the parent procedure (PFV) }
|
|
if current_procinfo.has_nestedprocs then
|
|
begin
|
|
if (df_generic in current_procinfo.procdef.defoptions) then
|
|
Comment(V_Error,'Generic methods cannot have nested procedures')
|
|
else
|
|
if (po_inline in current_procinfo.procdef.procoptions) then
|
|
begin
|
|
Message1(parser_h_not_supported_for_inline,'nested procedures');
|
|
Message(parser_h_inlining_disabled);
|
|
exclude(current_procinfo.procdef.procoptions,po_inline);
|
|
end;
|
|
end;
|
|
|
|
{ When it's a nested procedure then defer the code generation,
|
|
when back at normal function level then generate the code
|
|
for all defered nested procedures and the current procedure }
|
|
if not isnestedproc then
|
|
begin
|
|
if not(df_generic in current_procinfo.procdef.defoptions) then
|
|
tcgprocinfo(current_procinfo).generate_code_tree;
|
|
end;
|
|
|
|
{ reset _FAIL as _SELF normal }
|
|
if (pd.proctypeoption=potype_constructor) then
|
|
tokeninfo^[_FAIL].keyword:=oldfailtokenmode;
|
|
|
|
{ release procinfo }
|
|
if tprocinfo(current_module.procinfo)<>current_procinfo then
|
|
internalerror(200304274);
|
|
current_module.procinfo:=current_procinfo.parent;
|
|
|
|
{ For specialization we didn't record the last semicolon. Moving this parsing
|
|
into the parse_body routine is not done because of having better file position
|
|
information available }
|
|
if not(df_specialization in current_procinfo.procdef.defoptions) then
|
|
consume(_SEMICOLON);
|
|
|
|
if not isnestedproc then
|
|
{ current_procinfo is checked for nil later on }
|
|
freeandnil(current_procinfo);
|
|
end;
|
|
|
|
|
|
procedure read_proc(isclassmethod:boolean; usefwpd: tprocdef);
|
|
{
|
|
Parses the procedure directives, then parses the procedure body, then
|
|
generates the code for it
|
|
}
|
|
|
|
var
|
|
old_current_procinfo : tprocinfo;
|
|
old_current_structdef: tabstractrecorddef;
|
|
old_current_genericdef,
|
|
old_current_specializedef: tstoreddef;
|
|
pdflags : tpdflags;
|
|
pd,firstpd : tprocdef;
|
|
s : string;
|
|
begin
|
|
{ save old state }
|
|
old_current_procinfo:=current_procinfo;
|
|
old_current_structdef:=current_structdef;
|
|
old_current_genericdef:=current_genericdef;
|
|
old_current_specializedef:=current_specializedef;
|
|
|
|
{ reset current_procinfo.procdef to nil to be sure that nothing is writing
|
|
to another procdef }
|
|
current_procinfo:=nil;
|
|
current_structdef:=nil;
|
|
current_genericdef:=nil;
|
|
current_specializedef:=nil;
|
|
|
|
if not assigned(usefwpd) then
|
|
{ parse procedure declaration }
|
|
pd:=parse_proc_dec(isclassmethod,old_current_structdef)
|
|
else
|
|
pd:=usefwpd;
|
|
|
|
{ set the default function options }
|
|
if parse_only then
|
|
begin
|
|
pd.forwarddef:=true;
|
|
{ set also the interface flag, for better error message when the
|
|
implementation doesn't much this header }
|
|
pd.interfacedef:=true;
|
|
include(pd.procoptions,po_global);
|
|
pdflags:=[pd_interface];
|
|
end
|
|
else
|
|
begin
|
|
pdflags:=[pd_body];
|
|
if (not current_module.in_interface) then
|
|
include(pdflags,pd_implemen);
|
|
if (not current_module.is_unit) or
|
|
create_smartlink then
|
|
include(pd.procoptions,po_global);
|
|
pd.forwarddef:=false;
|
|
end;
|
|
|
|
if not assigned(usefwpd) then
|
|
begin
|
|
{ parse the directives that may follow }
|
|
parse_proc_directives(pd,pdflags);
|
|
|
|
{ hint directives, these can be separated by semicolons here,
|
|
that needs to be handled here with a loop (PFV) }
|
|
while try_consume_hintdirective(pd.symoptions,pd.deprecatedmsg) do
|
|
Consume(_SEMICOLON);
|
|
|
|
{ Set calling convention }
|
|
handle_calling_convention(pd);
|
|
end;
|
|
|
|
{ search for forward declarations }
|
|
if not proc_add_definition(pd) then
|
|
begin
|
|
{ A method must be forward defined (in the object declaration) }
|
|
if assigned(pd.struct) and
|
|
(not assigned(old_current_structdef)) then
|
|
begin
|
|
MessagePos1(pd.fileinfo,parser_e_header_dont_match_any_member,pd.fullprocname(false));
|
|
tprocsym(pd.procsym).write_parameter_lists(pd);
|
|
end
|
|
else
|
|
begin
|
|
{ Give a better error if there is a forward def in the interface and only
|
|
a single implementation }
|
|
firstpd:=tprocdef(tprocsym(pd.procsym).ProcdefList[0]);
|
|
if (not pd.forwarddef) and
|
|
(not pd.interfacedef) and
|
|
(tprocsym(pd.procsym).ProcdefList.Count>1) and
|
|
firstpd.forwarddef and
|
|
firstpd.interfacedef and
|
|
not(tprocsym(pd.procsym).ProcdefList.Count>2) and
|
|
{ don't give an error if it may be an overload }
|
|
not(m_fpc in current_settings.modeswitches) and
|
|
(not(po_overload in pd.procoptions) or
|
|
not(po_overload in firstpd.procoptions)) then
|
|
begin
|
|
MessagePos1(pd.fileinfo,parser_e_header_dont_match_forward,pd.fullprocname(false));
|
|
tprocsym(pd.procsym).write_parameter_lists(pd);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ Set mangled name }
|
|
proc_set_mangledname(pd);
|
|
|
|
{ compile procedure when a body is needed }
|
|
if (pd_body in pdflags) then
|
|
begin
|
|
read_proc_body(old_current_procinfo,pd);
|
|
end
|
|
else
|
|
begin
|
|
{ Handle imports }
|
|
if (po_external in pd.procoptions) then
|
|
begin
|
|
{ Import DLL specified? }
|
|
if assigned(pd.import_dll) then
|
|
begin
|
|
if assigned (pd.import_name) then
|
|
current_module.AddExternalImport(pd.import_dll^,
|
|
pd.import_name^,proc_get_importname(pd),
|
|
pd.import_nr,false,false)
|
|
else
|
|
current_module.AddExternalImport(pd.import_dll^,
|
|
proc_get_importname(pd),proc_get_importname(pd),
|
|
pd.import_nr,false,true);
|
|
end
|
|
else
|
|
begin
|
|
{ add import name to external list for DLL scanning }
|
|
if tf_has_dllscanner in target_info.flags then
|
|
current_module.dllscannerinputlist.Add(proc_get_importname(pd),pd);
|
|
end;
|
|
|
|
{ External declared in implementation, and there was already a
|
|
forward (or interface) declaration then we need to generate
|
|
a stub that calls the external routine }
|
|
if (not pd.forwarddef) and
|
|
(pd.hasforward)
|
|
{ it is unclear to me what's the use of the following condition,
|
|
so commented out, see also issue #18371 (FK)
|
|
and
|
|
not(
|
|
assigned(pd.import_dll) and
|
|
(target_info.system in [system_i386_wdosx,
|
|
system_arm_wince,system_i386_wince])
|
|
) } then
|
|
begin
|
|
s:=proc_get_importname(pd);
|
|
if s<>'' then
|
|
gen_external_stub(current_asmdata.asmlists[al_procedures],pd,s);
|
|
{ remove the external stuff, so that the interface crc
|
|
doesn't change. This makes the function calls less
|
|
efficient, but it means that the interface doesn't
|
|
change if the function is ever redirected to another
|
|
function or implemented in the unit. }
|
|
pd.procoptions:=pd.procoptions-[po_external,po_has_importname,po_has_importdll];
|
|
stringdispose(pd.import_name);
|
|
stringdispose(pd.import_dll);
|
|
pd.import_nr:=0;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ make sure that references to forward-declared functions are not }
|
|
{ treated as references to external symbols, needed for darwin. }
|
|
|
|
{ make sure we don't change the binding of real external symbols }
|
|
if not(po_external in pd.procoptions) then
|
|
begin
|
|
if (po_global in pd.procoptions) or
|
|
(cs_profile in current_settings.moduleswitches) then
|
|
current_asmdata.DefineAsmSymbol(pd.mangledname,AB_GLOBAL,AT_FUNCTION)
|
|
else
|
|
current_asmdata.DefineAsmSymbol(pd.mangledname,AB_LOCAL,AT_FUNCTION);
|
|
end;
|
|
|
|
current_structdef:=old_current_structdef;
|
|
current_genericdef:=old_current_genericdef;
|
|
current_specializedef:=old_current_specializedef;
|
|
current_procinfo:=old_current_procinfo;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
DECLARATION PARSING
|
|
****************************************************************************}
|
|
|
|
{ search in symtablestack for not complete classes }
|
|
procedure check_forward_class(p:TObject;arg:pointer);
|
|
begin
|
|
if (tsym(p).typ=typesym) and
|
|
(ttypesym(p).typedef.typ=objectdef) and
|
|
(oo_is_forward in tobjectdef(ttypesym(p).typedef).objectoptions) then
|
|
MessagePos1(tsym(p).fileinfo,sym_e_forward_type_not_resolved,tsym(p).realname);
|
|
end;
|
|
|
|
|
|
procedure read_declarations(islibrary : boolean);
|
|
var
|
|
is_classdef:boolean;
|
|
begin
|
|
is_classdef:=false;
|
|
repeat
|
|
if not assigned(current_procinfo) then
|
|
internalerror(200304251);
|
|
case token of
|
|
_LABEL:
|
|
label_dec;
|
|
_CONST:
|
|
const_dec;
|
|
_TYPE:
|
|
type_dec;
|
|
_VAR:
|
|
var_dec;
|
|
_THREADVAR:
|
|
threadvar_dec;
|
|
_CLASS:
|
|
begin
|
|
is_classdef:=false;
|
|
if try_to_consume(_CLASS) then
|
|
begin
|
|
{ class modifier is only allowed for procedures, functions, }
|
|
{ constructors, destructors }
|
|
if not(token in [_FUNCTION,_PROCEDURE,_CONSTRUCTOR,_DESTRUCTOR,_OPERATOR]) and
|
|
not((token=_ID) and (idtoken=_OPERATOR)) then
|
|
Message(parser_e_procedure_or_function_expected);
|
|
|
|
if is_interface(current_structdef) then
|
|
Message(parser_e_no_static_method_in_interfaces)
|
|
else
|
|
{ class methods are also allowed for Objective-C protocols }
|
|
is_classdef:=true;
|
|
end;
|
|
end;
|
|
_CONSTRUCTOR,
|
|
_DESTRUCTOR,
|
|
_FUNCTION,
|
|
_PROCEDURE,
|
|
_OPERATOR:
|
|
begin
|
|
read_proc(is_classdef,nil);
|
|
is_classdef:=false;
|
|
end;
|
|
_EXPORTS:
|
|
begin
|
|
if (current_procinfo.procdef.localst.symtablelevel>main_program_level) then
|
|
begin
|
|
Message(parser_e_syntax_error);
|
|
consume_all_until(_SEMICOLON);
|
|
end
|
|
else if islibrary or
|
|
(target_info.system in systems_unit_program_exports) then
|
|
read_exports
|
|
else
|
|
begin
|
|
Message(parser_w_unsupported_feature);
|
|
consume(_BEGIN);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
case idtoken of
|
|
_RESOURCESTRING:
|
|
begin
|
|
{ m_class is needed, because the resourcestring
|
|
loading is in the ObjPas unit }
|
|
{ if (m_class in current_settings.modeswitches) then}
|
|
resourcestring_dec
|
|
{ else
|
|
break;}
|
|
end;
|
|
_OPERATOR:
|
|
begin
|
|
if is_classdef then
|
|
begin
|
|
read_proc(is_classdef,nil);
|
|
is_classdef:=false;
|
|
end
|
|
else
|
|
break;
|
|
end;
|
|
_PROPERTY:
|
|
begin
|
|
if (m_fpc in current_settings.modeswitches) then
|
|
property_dec
|
|
else
|
|
break;
|
|
end;
|
|
else
|
|
break;
|
|
end;
|
|
end;
|
|
end;
|
|
until false;
|
|
|
|
{ add implementations for synthetic method declarations added by
|
|
the compiler (not for unit/program init functions, their localst
|
|
is the staticst -> would duplicate the work done in pmodules) }
|
|
if current_procinfo.procdef.localst.symtabletype=localsymtable then
|
|
add_synthetic_method_implementations(current_procinfo.procdef.localst);
|
|
|
|
{ check for incomplete class definitions, this is only required
|
|
for fpc modes }
|
|
if (m_fpc in current_settings.modeswitches) then
|
|
current_procinfo.procdef.localst.SymList.ForEachCall(@check_forward_class,nil);
|
|
end;
|
|
|
|
|
|
procedure read_interface_declarations;
|
|
begin
|
|
repeat
|
|
case token of
|
|
_CONST :
|
|
const_dec;
|
|
_TYPE :
|
|
type_dec;
|
|
_VAR :
|
|
var_dec;
|
|
_THREADVAR :
|
|
threadvar_dec;
|
|
_FUNCTION,
|
|
_PROCEDURE,
|
|
_OPERATOR :
|
|
read_proc(false,nil);
|
|
else
|
|
begin
|
|
case idtoken of
|
|
_RESOURCESTRING :
|
|
resourcestring_dec;
|
|
_PROPERTY:
|
|
begin
|
|
if (m_fpc in current_settings.modeswitches) then
|
|
property_dec
|
|
else
|
|
break;
|
|
end;
|
|
else
|
|
break;
|
|
end;
|
|
end;
|
|
end;
|
|
until false;
|
|
{ check for incomplete class definitions, this is only required
|
|
for fpc modes }
|
|
if (m_fpc in current_settings.modeswitches) then
|
|
symtablestack.top.SymList.ForEachCall(@check_forward_class,nil);
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
SPECIALIZATION BODY GENERATION
|
|
****************************************************************************}
|
|
|
|
|
|
procedure specialize_objectdefs(p:TObject;arg:pointer);
|
|
var
|
|
oldcurrent_filepos : tfileposinfo;
|
|
specobj : tabstractrecorddef;
|
|
state : tspecializationstate;
|
|
|
|
procedure process_abstractrecorddef(def:tabstractrecorddef);
|
|
var
|
|
i : longint;
|
|
hp : tdef;
|
|
hmodule : tmodule;
|
|
begin
|
|
hmodule:=find_module_from_symtable(def.genericdef.owner);
|
|
if hmodule=nil then
|
|
internalerror(201202041);
|
|
for i:=0 to def.symtable.DefList.Count-1 do
|
|
begin
|
|
hp:=tdef(def.symtable.DefList[i]);
|
|
if hp.typ=procdef then
|
|
begin
|
|
{ only generate the code if we need a body }
|
|
if assigned(tprocdef(hp).struct) and not tprocdef(hp).forwarddef then
|
|
continue;
|
|
if assigned(tprocdef(hp).genericdef) and
|
|
(tprocdef(hp).genericdef.typ=procdef) and
|
|
assigned(tprocdef(tprocdef(hp).genericdef).generictokenbuf) then
|
|
begin
|
|
oldcurrent_filepos:=current_filepos;
|
|
current_filepos:=tprocdef(tprocdef(hp).genericdef).fileinfo;
|
|
{ use the index the module got from the current compilation process }
|
|
current_filepos.moduleindex:=hmodule.unit_index;
|
|
current_tokenpos:=current_filepos;
|
|
current_scanner.startreplaytokens(tprocdef(tprocdef(hp).genericdef).generictokenbuf);
|
|
read_proc_body(nil,tprocdef(hp));
|
|
current_filepos:=oldcurrent_filepos;
|
|
end
|
|
{ synthetic routines will be implemented afterwards }
|
|
else if tprocdef(hp).synthetickind=tsk_none then
|
|
MessagePos1(tprocdef(hp).fileinfo,sym_e_forward_not_resolved,tprocdef(hp).fullprocname(false));
|
|
end
|
|
else
|
|
if hp.typ in [objectdef,recorddef] then
|
|
{ generate code for subtypes as well }
|
|
process_abstractrecorddef(tabstractrecorddef(hp));
|
|
end;
|
|
end;
|
|
|
|
begin
|
|
if not((tsym(p).typ=typesym) and
|
|
(ttypesym(p).typedef.typesym=tsym(p)) and
|
|
(ttypesym(p).typedef.typ in [objectdef,recorddef]) and
|
|
(df_specialization in ttypesym(p).typedef.defoptions)
|
|
) then
|
|
exit;
|
|
|
|
{ Setup symtablestack a definition time }
|
|
specobj:=tabstractrecorddef(ttypesym(p).typedef);
|
|
|
|
if not (is_class_or_object(specobj) or is_record(specobj) or is_javaclass(specobj)) then
|
|
exit;
|
|
|
|
specialization_init(specobj.genericdef,state);
|
|
|
|
{ procedure definitions for classes or objects }
|
|
process_abstractrecorddef(specobj);
|
|
|
|
specialization_done(state);
|
|
end;
|
|
|
|
|
|
procedure generate_specialization_procs;
|
|
begin
|
|
if assigned(current_module.globalsymtable) then
|
|
current_module.globalsymtable.SymList.WhileEachCall(@specialize_objectdefs,nil);
|
|
if assigned(current_module.localsymtable) then
|
|
current_module.localsymtable.SymList.WhileEachCall(@specialize_objectdefs,nil);
|
|
end;
|
|
|
|
end.
|