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479 lines
14 KiB
ObjectPascal
479 lines
14 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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This unit exports some help routines for the code generation
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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 hcodegen;
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{$i defines.inc}
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interface
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uses
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{ common }
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cclasses,
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{ global }
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globals,verbose,
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{ symtable }
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symconst,symtype,symdef,symsym,
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{ aasm }
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aasm,cpubase
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;
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const
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pi_uses_asm = $1; { set, if the procedure uses asm }
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pi_is_global = $2; { set, if the procedure is exported by an unit }
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pi_do_call = $4; { set, if the procedure does a call }
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pi_operator = $8; { set, if the procedure is an operator }
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pi_C_import = $10; { set, if the procedure is an external C function }
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pi_uses_exceptions = $20;{ set, if the procedure has a try statement => }
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{ no register variables }
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pi_is_assembler = $40; { set if the procedure is declared as ASSEMBLER
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=> don't optimize}
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pi_needs_implicit_finally = $80; { set, if the procedure contains data which }
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{ needs to be finalized }
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type
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pprocinfo = ^tprocinfo;
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tprocinfo = object
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{ pointer to parent in nested procedures }
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parent : pprocinfo;
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{ current class, if we are in a method }
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_class : tobjectdef;
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{ return type }
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returntype : ttype;
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{ symbol of the function, and the sym for result variable }
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resultfuncretsym,
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funcretsym : tfuncretsym;
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funcret_state : tvarstate;
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{ the definition of the proc itself }
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def : tprocdef;
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sym : tprocsym;
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{ frame pointer offset }
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framepointer_offset : longint;
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{ self pointer offset }
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selfpointer_offset : longint;
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{ result value offset }
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return_offset : longint;
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{ firsttemp position }
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firsttemp_offset : longint;
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{ parameter offset }
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para_offset : longint;
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{ some collected informations about the procedure }
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{ see pi_xxxx above }
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flags : longint;
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{ register used as frame pointer }
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framepointer : tregister;
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{ true, if the procedure is exported by an unit }
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globalsymbol : boolean;
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{ true, if the procedure should be exported (only OS/2) }
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exported : boolean;
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{ true, if we can not use fast exit code }
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no_fast_exit : boolean;
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{ code for the current procedure }
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aktproccode,aktentrycode,
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aktexitcode,aktlocaldata : taasmoutput;
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{ local data is used for smartlink }
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constructor init;
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destructor done;
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end;
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pregvarinfo = ^tregvarinfo;
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tregvarinfo = record
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regvars : array[1..maxvarregs] of tvarsym;
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regvars_para : array[1..maxvarregs] of boolean;
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regvars_refs : array[1..maxvarregs] of longint;
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fpuregvars : array[1..maxfpuvarregs] of tvarsym;
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fpuregvars_para : array[1..maxfpuvarregs] of boolean;
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fpuregvars_refs : array[1..maxfpuvarregs] of longint;
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end;
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var
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{ info about the current sub routine }
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procinfo : pprocinfo;
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{ labels for BREAK and CONTINUE }
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aktbreaklabel,aktcontinuelabel : tasmlabel;
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{ label when the result is true or false }
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truelabel,falselabel : tasmlabel;
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{ label to leave the sub routine }
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aktexitlabel : tasmlabel;
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{ also an exit label, only used we need to clear only the stack }
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aktexit2label : tasmlabel;
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{ only used in constructor for fail or if getmem fails }
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faillabel,quickexitlabel : tasmlabel;
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{ Boolean, wenn eine loadn kein Assembler erzeugt hat }
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simple_loadn : boolean;
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{ true, if an error while code generation occurs }
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codegenerror : boolean;
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{ save the size of pushed parameter, needed for aligning }
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pushedparasize : longint;
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make_const_global : boolean;
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{ message calls with codegenerror support }
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procedure cgmessage(t : longint);
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procedure cgmessage1(t : longint;const s : string);
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procedure cgmessage2(t : longint;const s1,s2 : string);
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procedure cgmessage3(t : longint;const s1,s2,s3 : string);
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procedure CGMessagePos(const pos:tfileposinfo;t:longint);
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procedure CGMessagePos1(const pos:tfileposinfo;t:longint;const s1:string);
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procedure CGMessagePos2(const pos:tfileposinfo;t:longint;const s1,s2:string);
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procedure CGMessagePos3(const pos:tfileposinfo;t:longint;const s1,s2,s3:string);
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{ initialize respectively terminates the code generator }
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{ for a new module or procedure }
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procedure codegen_doneprocedure;
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procedure codegen_donemodule;
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procedure codegen_newmodule;
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procedure codegen_newprocedure;
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implementation
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uses
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systems,
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cresstr
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{$ifdef fixLeaksOnError}
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,comphook
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{$endif fixLeaksOnError}
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;
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{$ifdef fixLeaksOnError}
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var procinfoStack: TStack;
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hcodegen_old_do_stop: tstopprocedure;
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{$endif fixLeaksOnError}
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{*****************************************************************************
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override the message calls to set codegenerror
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*****************************************************************************}
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procedure cgmessage(t : longint);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.Message(t);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessage1(t : longint;const s : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.Message1(t,s);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessage2(t : longint;const s1,s2 : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.Message2(t,s1,s2);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessage3(t : longint;const s1,s2,s3 : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.Message3(t,s1,s2,s3);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessagepos(const pos:tfileposinfo;t : longint);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.MessagePos(pos,t);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessagepos1(const pos:tfileposinfo;t : longint;const s1 : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.MessagePos1(pos,t,s1);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessagepos2(const pos:tfileposinfo;t : longint;const s1,s2 : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.MessagePos2(pos,t,s1,s2);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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procedure cgmessagepos3(const pos:tfileposinfo;t : longint;const s1,s2,s3 : string);
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var
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olderrorcount : longint;
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begin
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if not(codegenerror) then
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begin
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olderrorcount:=Errorcount;
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verbose.MessagePos3(pos,t,s1,s2,s3);
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codegenerror:=olderrorcount<>Errorcount;
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end;
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end;
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{****************************************************************************
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TProcInfo
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****************************************************************************}
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constructor tprocinfo.init;
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begin
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parent:=nil;
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_class:=nil;
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returntype.reset;
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resultfuncretsym:=nil;
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funcretsym:=nil;
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funcret_state:=vs_none;
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def:=nil;
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sym:=nil;
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framepointer_offset:=0;
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selfpointer_offset:=0;
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return_offset:=0;
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firsttemp_offset:=0;
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para_offset:=0;
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flags:=0;
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framepointer:=R_NO;
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globalsymbol:=false;
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exported:=false;
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no_fast_exit:=false;
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aktentrycode:=Taasmoutput.Create;
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aktexitcode:=Taasmoutput.Create;
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aktproccode:=Taasmoutput.Create;
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aktlocaldata:=Taasmoutput.Create;
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end;
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destructor tprocinfo.done;
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begin
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aktentrycode.free;
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aktexitcode.free;
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aktproccode.free;
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aktlocaldata.free;
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end;
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{*****************************************************************************
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initialize/terminate the codegen for procedure and modules
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*****************************************************************************}
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procedure codegen_newprocedure;
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begin
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aktbreaklabel:=nil;
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aktcontinuelabel:=nil;
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{ aktexitlabel:=0; is store in oldaktexitlabel
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so it must not be reset to zero before this storage !}
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{ new procinfo }
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new(procinfo,init);
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{$ifdef fixLeaksOnError}
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procinfoStack.push(procinfo);
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{$endif fixLeaksOnError}
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end;
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procedure codegen_doneprocedure;
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begin
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{$ifdef fixLeaksOnError}
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if procinfo <> procinfoStack.pop then
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writeln('problem with procinfoStack!');
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{$endif fixLeaksOnError}
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dispose(procinfo,done);
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procinfo:=nil;
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end;
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procedure codegen_newmodule;
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begin
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exprasmlist:=taasmoutput.create;
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datasegment:=taasmoutput.create;
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codesegment:=taasmoutput.create;
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bsssegment:=taasmoutput.create;
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debuglist:=taasmoutput.create;
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withdebuglist:=taasmoutput.create;
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consts:=taasmoutput.create;
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rttilist:=taasmoutput.create;
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ResourceStringList:=Nil;
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importssection:=nil;
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exportssection:=nil;
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resourcesection:=nil;
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{ assembler symbols }
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asmsymbollist:=tdictionary.create;
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asmsymbollist.usehash;
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{ resourcestrings }
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ResourceStrings:=TResourceStrings.Create;
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end;
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procedure codegen_donemodule;
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{$ifdef MEMDEBUG}
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var
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d : tmemdebug;
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{$endif}
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begin
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{$ifdef MEMDEBUG}
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d.init('asmlist');
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{$endif}
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exprasmlist.free;
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codesegment.free;
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bsssegment.free;
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datasegment.free;
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debuglist.free;
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withdebuglist.free;
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consts.free;
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rttilist.free;
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if assigned(ResourceStringList) then
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ResourceStringList.free;
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if assigned(importssection) then
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importssection.free;
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if assigned(exportssection) then
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exportssection.free;
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if assigned(resourcesection) then
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resourcesection.free;
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{$ifdef MEMDEBUG}
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d.free;
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{$endif}
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{ assembler symbols }
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{$ifdef MEMDEBUG}
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d.init('asmsymbol');
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{$endif}
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asmsymbollist.free;
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{$ifdef MEMDEBUG}
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d.free;
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{$endif}
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{ resource strings }
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ResourceStrings.free;
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end;
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{$ifdef fixLeaksOnError}
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procedure hcodegen_do_stop;
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var p: pprocinfo;
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begin
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p := pprocinfo(procinfoStack.pop);
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while p <> nil Do
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begin
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dispose(p,done);
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p := pprocinfo(procinfoStack.pop);
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end;
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procinfoStack.done;
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do_stop := hcodegen_old_do_stop;
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do_stop{$ifdef FPCPROCVAR}(){$endif};
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end;
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begin
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hcodegen_old_do_stop := do_stop;
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do_stop := {$ifdef FPCPROCVAR}@{$endif}hcodegen_do_stop;
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procinfoStack.init;
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{$endif fixLeaksOnError}
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end.
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{
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$Log$
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Revision 1.10 2001-04-13 01:22:07 peter
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* symtable change to classes
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* range check generation and errors fixed, make cycle DEBUG=1 works
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* memory leaks fixed
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Revision 1.9 2000/12/25 00:07:26 peter
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+ new tlinkedlist class (merge of old tstringqueue,tcontainer and
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tlinkedlist objects)
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Revision 1.8 2000/11/30 22:16:49 florian
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* moved to i386
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Revision 1.7 2000/10/31 22:02:47 peter
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* symtable splitted, no real code changes
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Revision 1.6 2000/09/24 15:06:17 peter
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* use defines.inc
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Revision 1.5 2000/08/27 16:11:51 peter
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* moved some util functions from globals,cobjects to cutils
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* splitted files into finput,fmodule
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Revision 1.4 2000/08/12 15:34:22 peter
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+ usedasmsymbollist to check and reset only the used symbols (merged)
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Revision 1.3 2000/08/03 13:17:26 jonas
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+ allow regvars to be used inside inlined procs, which required the
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following changes:
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+ load regvars in genentrycode/free them in genexitcode (cgai386)
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* moved all regvar related code to new regvars unit
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+ added pregvarinfo type to hcodegen
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+ added regvarinfo field to tprocinfo (symdef/symdefh)
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* deallocate the regvars of the caller in secondprocinline before
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inlining the called procedure and reallocate them afterwards
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Revision 1.2 2000/07/13 11:32:41 michael
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+ removed logs
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}
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