mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 02:31:49 +01:00
1708 lines
68 KiB
ObjectPascal
1708 lines
68 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate assembler for nodes that influence the flow which are
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the same for all (most?) processors
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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 ncgflw;
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{$i fpcdefs.inc}
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interface
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uses
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aasmbase,node,nflw,ncgutil;
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type
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tcgwhilerepeatnode = class(twhilerepeatnode)
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usedregvars: tusedregvars;
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procedure pass_generate_code;override;
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procedure sync_regvars(checkusedregvars: boolean);
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end;
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tcgifnode = class(tifnode)
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procedure pass_generate_code;override;
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end;
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tcgfornode = class(tfornode)
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usedregvars: tusedregvars;
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procedure pass_generate_code;override;
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procedure sync_regvars(checkusedregvars: boolean);
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end;
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tcgexitnode = class(texitnode)
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procedure pass_generate_code;override;
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end;
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tcgbreaknode = class(tbreaknode)
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procedure pass_generate_code;override;
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end;
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tcgcontinuenode = class(tcontinuenode)
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procedure pass_generate_code;override;
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end;
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tcggotonode = class(tgotonode)
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procedure pass_generate_code;override;
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end;
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tcglabelnode = class(tlabelnode)
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private
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asmlabel : tasmlabel;
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public
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function getasmlabel : tasmlabel;
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procedure pass_generate_code;override;
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end;
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tcgraisenode = class(traisenode)
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procedure pass_generate_code;override;
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end;
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tcgtryexceptnode = class(ttryexceptnode)
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procedure pass_generate_code;override;
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end;
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tcgtryfinallynode = class(ttryfinallynode)
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procedure pass_generate_code;override;
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end;
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tcgonnode = class(tonnode)
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procedure pass_generate_code;override;
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end;
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implementation
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uses
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verbose,globals,systems,globtype,constexp,
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symconst,symdef,symsym,aasmtai,aasmdata,aasmcpu,defutil,
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procinfo,cgbase,pass_2,parabase,
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cpubase,cpuinfo,
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nld,ncon,
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tgobj,paramgr,
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regvars,
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cgutils,cgobj
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;
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{*****************************************************************************
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Second_While_RepeatN
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*****************************************************************************}
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procedure tcgwhilerepeatnode.sync_regvars(checkusedregvars: boolean);
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begin
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if (cs_opt_regvar in current_settings.optimizerswitches) and
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not(pi_has_goto in current_procinfo.flags) then
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begin
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if checkusedregvars then
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begin
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usedregvars.intregvars.init;
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usedregvars.fpuregvars.init;
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usedregvars.mmregvars.init;
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{ we have to synchronise both the regvars used in the loop }
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{ and the ones in the while/until condition }
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get_used_regvars(self,usedregvars);
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gen_sync_regvars(current_asmdata.CurrAsmList,usedregvars);
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end
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else
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begin
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gen_sync_regvars(current_asmdata.CurrAsmList,usedregvars);
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usedregvars.intregvars.done;
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usedregvars.fpuregvars.done;
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usedregvars.mmregvars.done;
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end;
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end;
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end;
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procedure tcgwhilerepeatnode.pass_generate_code;
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var
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lcont,lbreak,lloop,
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oldclabel,oldblabel : tasmlabel;
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otlabel,oflabel : tasmlabel;
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oldflowcontrol : tflowcontrol;
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oldexecutionweight : longint;
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begin
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location_reset(location,LOC_VOID,OS_NO);
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current_asmdata.getjumplabel(lloop);
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current_asmdata.getjumplabel(lcont);
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current_asmdata.getjumplabel(lbreak);
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{ arrange continue and breaklabels: }
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oldflowcontrol:=flowcontrol;
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oldclabel:=current_procinfo.CurrContinueLabel;
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oldblabel:=current_procinfo.CurrBreakLabel;
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include(flowcontrol,fc_inflowcontrol);
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sync_regvars(true);
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{$ifdef OLDREGVARS}
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load_all_regvars(current_asmdata.CurrAsmList);
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{$endif OLDREGVARS}
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{ handling code at the end as it is much more efficient, and makes
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while equal to repeat loop, only the end true/false is swapped (PFV) }
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if lnf_testatbegin in loopflags then
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cg.a_jmp_always(current_asmdata.CurrAsmList,lcont);
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if not(cs_opt_size in current_settings.optimizerswitches) then
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{ align loop target }
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current_asmdata.CurrAsmList.concat(Tai_align.Create(current_settings.alignment.loopalign));
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cg.a_label(current_asmdata.CurrAsmList,lloop);
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current_procinfo.CurrContinueLabel:=lcont;
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current_procinfo.CurrBreakLabel:=lbreak;
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if assigned(right) then
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begin
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{ calc register weight }
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oldexecutionweight:=cg.executionweight;
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cg.executionweight:=cg.executionweight*8;
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secondpass(right);
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cg.executionweight:=oldexecutionweight;
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end;
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{$ifdef OLDREGVARS}
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load_all_regvars(current_asmdata.CurrAsmList);
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{$endif OLDREGVARS}
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cg.a_label(current_asmdata.CurrAsmList,lcont);
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otlabel:=current_procinfo.CurrTrueLabel;
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oflabel:=current_procinfo.CurrFalseLabel;
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if lnf_checknegate in loopflags then
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begin
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current_procinfo.CurrTrueLabel:=lbreak;
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current_procinfo.CurrFalseLabel:=lloop;
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end
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else
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begin
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current_procinfo.CurrTrueLabel:=lloop;
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current_procinfo.CurrFalseLabel:=lbreak;
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end;
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secondpass(left);
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maketojumpbool(current_asmdata.CurrAsmList,left,lr_load_regvars);
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cg.a_label(current_asmdata.CurrAsmList,lbreak);
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sync_regvars(false);
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current_procinfo.CurrTrueLabel:=otlabel;
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current_procinfo.CurrFalseLabel:=oflabel;
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current_procinfo.CurrContinueLabel:=oldclabel;
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current_procinfo.CurrBreakLabel:=oldblabel;
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{ a break/continue in a while/repeat block can't be seen outside }
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flowcontrol:=oldflowcontrol+(flowcontrol-[fc_break,fc_continue,fc_inflowcontrol]);
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end;
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{*****************************************************************************
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tcgIFNODE
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*****************************************************************************}
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procedure tcgifnode.pass_generate_code;
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var
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hl,otlabel,oflabel : tasmlabel;
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oldflowcontrol: tflowcontrol;
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oldexecutionweight : longint;
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(*
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org_regvar_loaded_other,
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then_regvar_loaded_other,
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else_regvar_loaded_other : regvarother_booleanarray;
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org_regvar_loaded_int,
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then_regvar_loaded_int,
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else_regvar_loaded_int : Tsuperregisterset;
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org_list,
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then_list,
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else_list : TAsmList;
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*)
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begin
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location_reset(location,LOC_VOID,OS_NO);
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oldflowcontrol := flowcontrol;
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include(flowcontrol,fc_inflowcontrol);
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otlabel:=current_procinfo.CurrTrueLabel;
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oflabel:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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secondpass(left);
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(*
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{ save regvars loaded in the beginning so that we can restore them }
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{ when processing the else-block }
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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org_list := current_asmdata.CurrAsmList;
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current_asmdata.CurrAsmList := TAsmList.create;
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end;
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*)
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maketojumpbool(current_asmdata.CurrAsmList,left,lr_dont_load_regvars);
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(*
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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org_regvar_loaded_int := rg.regvar_loaded_int;
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org_regvar_loaded_other := rg.regvar_loaded_other;
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end;
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*)
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{ determines registers weigths }
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oldexecutionweight:=cg.executionweight;
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cg.executionweight:=cg.executionweight div 2;
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if cg.executionweight<1 then
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cg.executionweight:=1;
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if assigned(right) then
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begin
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
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secondpass(right);
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end;
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{ save current asmlist (previous instructions + then-block) and }
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{ loaded regvar state and create new clean ones }
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{
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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then_regvar_loaded_int := rg.regvar_loaded_int;
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then_regvar_loaded_other := rg.regvar_loaded_other;
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rg.regvar_loaded_int := org_regvar_loaded_int;
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rg.regvar_loaded_other := org_regvar_loaded_other;
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then_list := current_asmdata.CurrAsmList;
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current_asmdata.CurrAsmList := TAsmList.create;
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end;
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}
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if assigned(t1) then
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begin
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if assigned(right) then
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begin
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current_asmdata.getjumplabel(hl);
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{ do go back to if line !! }
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(*
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if not(cs_opt_regvar in current_settings.optimizerswitches) then
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*)
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current_filepos:=current_asmdata.CurrAsmList.getlasttaifilepos^
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(*
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else
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current_filepos:=then_list.getlasttaifilepos^
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*)
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;
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cg.a_jmp_always(current_asmdata.CurrAsmList,hl);
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end;
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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secondpass(t1);
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(*
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{ save current asmlist (previous instructions + else-block) }
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{ and loaded regvar state and create a new clean list }
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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{ else_regvar_loaded_int := rg.regvar_loaded_int;
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else_regvar_loaded_other := rg.regvar_loaded_other;}
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else_list := current_asmdata.CurrAsmList;
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current_asmdata.CurrAsmList := TAsmList.create;
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end;
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*)
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if assigned(right) then
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cg.a_label(current_asmdata.CurrAsmList,hl);
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end
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else
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begin
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(*
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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{ else_regvar_loaded_int := rg.regvar_loaded_int;
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else_regvar_loaded_other := rg.regvar_loaded_other;}
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else_list := current_asmdata.CurrAsmList;
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current_asmdata.CurrAsmList := TAsmList.create;
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end;
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*)
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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end;
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if not(assigned(right)) then
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begin
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
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end;
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(*
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if cs_opt_regvar in current_settings.optimizerswitches then
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begin
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{ add loads of regvars at the end of the then- and else-blocks }
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{ so that at the end of both blocks the same regvars are loaded }
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{ no else block? }
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if not assigned(t1) then
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begin
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sync_regvars_int(org_list,then_list,org_regvar_loaded_int,then_regvar_loaded_int);
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sync_regvars_other(org_list,then_list,org_regvar_loaded_other,then_regvar_loaded_other);
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end
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{ no then block? }
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else if not assigned(right) then
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begin
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sync_regvars_int(org_list,else_list,org_regvar_loaded_int,else_regvar_loaded_int);
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sync_regvars_other(org_list,else_list,org_regvar_loaded_other,else_regvar_loaded_other);
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end
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{ both else and then blocks }
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else
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begin
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sync_regvars_int(then_list,else_list,then_regvar_loaded_int,else_regvar_loaded_int);
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sync_regvars_other(then_list,else_list,then_regvar_loaded_other,else_regvar_loaded_other);
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end;
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{ add all lists together }
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org_list.concatlist(then_list);
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then_list.free;
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org_list.concatlist(else_list);
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else_list.free;
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org_list.concatlist(current_asmdata.CurrAsmList);
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current_asmdata.CurrAsmList.free;
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current_asmdata.CurrAsmList := org_list;
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end;
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*)
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cg.executionweight:=oldexecutionweight;
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current_procinfo.CurrTrueLabel:=otlabel;
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current_procinfo.CurrFalseLabel:=oflabel;
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flowcontrol := oldflowcontrol + (flowcontrol - [fc_inflowcontrol]);
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end;
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{*****************************************************************************
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SecondFor
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*****************************************************************************}
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procedure tcgfornode.sync_regvars(checkusedregvars: boolean);
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begin
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if (cs_opt_regvar in current_settings.optimizerswitches) and
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not(pi_has_goto in current_procinfo.flags) then
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begin
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if checkusedregvars then
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begin
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usedregvars.intregvars.init;
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usedregvars.fpuregvars.init;
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usedregvars.mmregvars.init;
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{ We have to synchronise the loop variable and loop body. }
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{ The loop end is not necessary, unless it's a register }
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{ variable. The start value also doesn't matter. }
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{ loop var }
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get_used_regvars(right,usedregvars);
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{ loop body }
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get_used_regvars(t2,usedregvars);
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{ end value (t1) is not necessary (it cannot be a regvar, }
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{ see webtbs/tw8883) }
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gen_sync_regvars(current_asmdata.CurrAsmList,usedregvars);
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end
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else
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begin
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gen_sync_regvars(current_asmdata.CurrAsmList,usedregvars);
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usedregvars.intregvars.done;
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usedregvars.fpuregvars.done;
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usedregvars.mmregvars.done;
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end;
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end;
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end;
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procedure tcgfornode.pass_generate_code;
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var
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l3,oldclabel,oldblabel,
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otl, ofl : tasmlabel;
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temptovalue : boolean;
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hop : topcg;
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hcond : topcmp;
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opsize : tcgsize;
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count_var_is_signed,do_loopvar_at_end : boolean;
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cmp_const:Tconstexprint;
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oldflowcontrol : tflowcontrol;
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oldexecutionweight : longint;
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isjump: boolean;
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begin
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location_reset(location,LOC_VOID,OS_NO);
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oldclabel:=current_procinfo.CurrContinueLabel;
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oldblabel:=current_procinfo.CurrBreakLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrContinueLabel);
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current_asmdata.getjumplabel(current_procinfo.CurrBreakLabel);
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current_asmdata.getjumplabel(l3);
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{ only calculate reference }
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opsize := def_cgsize(left.resultdef);
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count_var_is_signed:=is_signed(left.resultdef);
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{ first set the to value
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because the count var can be in the expression ! }
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do_loopvar_at_end:=(lnf_dont_mind_loopvar_on_exit in loopflags)
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{ if the loop is unrolled and there is a jump into the loop,
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then we can't do the trick with incrementing the loop var only at the
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end
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}
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and not(assigned(entrylabel));
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isjump:=(t1.expectloc=LOC_JUMP);
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if isjump then
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begin
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otl:=current_procinfo.CurrTrueLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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ofl:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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end;
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secondpass(t1);
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if t1.location.loc in [LOC_FLAGS,LOC_JUMP] then
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location_force_reg(current_asmdata.CurrAsmList,t1.location,def_cgsize(t1.resultdef),false);
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if isjump then
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begin
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current_procinfo.CurrTrueLabel:=otl;
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current_procinfo.CurrFalseLabel:=ofl;
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end;
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{ calculate pointer value and check if changeable and if so }
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{ load into temporary variable }
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if t1.nodetype<>ordconstn then
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begin
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do_loopvar_at_end:=false;
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location_force_reg(current_asmdata.CurrAsmList,t1.location,t1.location.size,false);
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temptovalue:=true;
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end
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else
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temptovalue:=false;
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{ load loopvar, prefer loopvar being a register variable }
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oldexecutionweight:=cg.executionweight;
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inc(cg.executionweight,8);
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secondpass(left);
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cg.executionweight:=oldexecutionweight;
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{ load from value }
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isjump:=(right.expectloc=LOC_JUMP);
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if isjump then
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begin
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otl:=current_procinfo.CurrTrueLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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ofl:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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end;
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secondpass(right);
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if right.location.loc in [LOC_FLAGS,LOC_JUMP] then
|
|
location_force_reg(current_asmdata.CurrAsmList,right.location,def_cgsize(right.resultdef),false);
|
|
if isjump then
|
|
begin
|
|
current_procinfo.CurrTrueLabel:=otl;
|
|
current_procinfo.CurrFalseLabel:=ofl;
|
|
end;
|
|
|
|
maybechangeloadnodereg(current_asmdata.CurrAsmList,left,false);
|
|
oldflowcontrol:=flowcontrol;
|
|
include(flowcontrol,fc_inflowcontrol);
|
|
{ produce start assignment }
|
|
case left.location.loc of
|
|
LOC_REFERENCE,
|
|
LOC_CREFERENCE :
|
|
cg.a_load_loc_ref(current_asmdata.CurrAsmList,left.location.size,right.location,left.location.reference);
|
|
LOC_REGISTER,
|
|
LOC_CREGISTER:
|
|
cg.a_load_loc_reg(current_asmdata.CurrAsmList,left.location.size,right.location,left.location.register);
|
|
LOC_SUBSETREG,
|
|
LOC_CSUBSETREG :
|
|
cg.a_load_loc_subsetreg(current_asmdata.CurrAsmList,left.location.size,right.location,left.location.sreg);
|
|
else
|
|
internalerror(200501311);
|
|
end;
|
|
|
|
if lnf_backward in loopflags then
|
|
if count_var_is_signed then
|
|
hcond:=OC_LT
|
|
else
|
|
hcond:=OC_B
|
|
else
|
|
if count_var_is_signed then
|
|
hcond:=OC_GT
|
|
else
|
|
hcond:=OC_A;
|
|
|
|
sync_regvars(true);
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
|
|
if temptovalue then
|
|
begin
|
|
cg.a_cmp_reg_loc_label(current_asmdata.CurrAsmList,opsize,hcond,
|
|
t1.location.register,left.location,current_procinfo.CurrBreakLabel);
|
|
end
|
|
else
|
|
begin
|
|
if lnf_testatbegin in loopflags then
|
|
begin
|
|
cg.a_cmp_const_loc_label(current_asmdata.CurrAsmList,opsize,hcond,
|
|
tordconstnode(t1).value.svalue,
|
|
left.location,current_procinfo.CurrBreakLabel);
|
|
end;
|
|
end;
|
|
|
|
{If the loopvar doesn't mind on exit, we avoid this ugly
|
|
dec instruction and do the loopvar inc/dec after the loop
|
|
body.}
|
|
if not do_loopvar_at_end then
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
hop:=OP_ADD
|
|
else
|
|
hop:=OP_SUB;
|
|
cg.a_op_const_loc(current_asmdata.CurrAsmList,hop,1,left.location);
|
|
end;
|
|
|
|
if assigned(entrylabel) then
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,tcglabelnode(entrylabel).getasmlabel);
|
|
|
|
{ align loop target }
|
|
if not(cs_opt_size in current_settings.optimizerswitches) then
|
|
current_asmdata.CurrAsmList.concat(Tai_align.Create(current_settings.alignment.loopalign));
|
|
cg.a_label(current_asmdata.CurrAsmList,l3);
|
|
|
|
{If the loopvar doesn't mind on exit, we avoid the loopvar inc/dec
|
|
after the loop body instead of here.}
|
|
if not do_loopvar_at_end then
|
|
begin
|
|
{ according to count direction DEC or INC... }
|
|
if lnf_backward in loopflags then
|
|
hop:=OP_SUB
|
|
else
|
|
hop:=OP_ADD;
|
|
cg.a_op_const_loc(current_asmdata.CurrAsmList,hop,1,left.location);
|
|
end;
|
|
|
|
if assigned(t2) then
|
|
begin
|
|
{ Calc register weight }
|
|
oldexecutionweight:=cg.executionweight;
|
|
cg.executionweight:=cg.executionweight*8;
|
|
secondpass(t2);
|
|
cg.executionweight:=oldexecutionweight;
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
end;
|
|
|
|
{If the loopvar doesn't mind on exit, we do the loopvar inc/dec
|
|
after the loop body instead of here.}
|
|
if do_loopvar_at_end then
|
|
begin
|
|
{ according to count direction DEC or INC... }
|
|
if lnf_backward in loopflags then
|
|
hop:=OP_SUB
|
|
else
|
|
hop:=OP_ADD;
|
|
cg.a_op_const_loc(current_asmdata.CurrAsmList,hop,1,left.location);
|
|
end;
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrContinueLabel);
|
|
|
|
if do_loopvar_at_end then
|
|
if lnf_backward in loopflags then
|
|
if count_var_is_signed then
|
|
hcond:=OC_GTE
|
|
else
|
|
hcond:=OC_AE
|
|
else
|
|
if count_var_is_signed then
|
|
hcond:=OC_LTE
|
|
else
|
|
hcond:=OC_BE
|
|
else
|
|
if lnf_backward in loopflags then
|
|
if count_var_is_signed then
|
|
hcond:=OC_GT
|
|
else
|
|
hcond:=OC_A
|
|
else
|
|
if count_var_is_signed then
|
|
hcond:=OC_LT
|
|
else
|
|
hcond:=OC_B;
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
|
|
{ produce comparison and the corresponding }
|
|
{ jump }
|
|
if temptovalue then
|
|
begin
|
|
cg.a_cmp_reg_loc_label(current_asmdata.CurrAsmList,opsize,hcond,t1.location.register,
|
|
left.location,l3);
|
|
end
|
|
else
|
|
begin
|
|
cmp_const:=Tordconstnode(t1).value;
|
|
if do_loopvar_at_end then
|
|
begin
|
|
{Watch out for wrap around 255 -> 0.}
|
|
{Ugly: This code is way to long... Use tables?}
|
|
case opsize of
|
|
OS_8:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if byte(cmp_const.svalue)=low(byte) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(byte);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if byte(cmp_const.svalue)=high(byte) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=low(byte);
|
|
end
|
|
end
|
|
end;
|
|
OS_16:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if word(cmp_const.svalue)=high(word) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=low(word);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if word(cmp_const.svalue)=low(word) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(word);
|
|
end
|
|
end
|
|
end;
|
|
OS_32:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if cardinal(cmp_const.svalue)=high(cardinal) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=low(cardinal);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if cardinal(cmp_const.svalue)=low(cardinal) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(cardinal);
|
|
end
|
|
end
|
|
end;
|
|
OS_64:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if qword(cmp_const.uvalue)=high(qword) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=low(qword);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if qword(cmp_const.uvalue)=low(qword) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(qword);
|
|
end
|
|
end
|
|
end;
|
|
OS_S8:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if shortint(cmp_const.svalue)=low(shortint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(shortint);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if shortint(cmp_const.svalue)=high(shortint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=int64(low(shortint));
|
|
end
|
|
end
|
|
end;
|
|
OS_S16:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if integer(cmp_const.svalue)=high(smallint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=int64(low(smallint));
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if integer(cmp_const.svalue)=low(smallint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=int64(high(smallint));
|
|
end
|
|
end
|
|
end;
|
|
OS_S32:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if longint(cmp_const.svalue)=high(longint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=int64(low(longint));
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if longint(cmp_const.svalue)=low(longint) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=int64(high(longint));
|
|
end
|
|
end
|
|
end;
|
|
OS_S64:
|
|
begin
|
|
if lnf_backward in loopflags then
|
|
begin
|
|
if int64(cmp_const.svalue)=high(int64) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=low(int64);
|
|
end
|
|
end
|
|
else
|
|
begin
|
|
if int64(cmp_const.svalue)=low(int64) then
|
|
begin
|
|
hcond:=OC_NE;
|
|
cmp_const:=high(int64);
|
|
end
|
|
end
|
|
end;
|
|
else
|
|
internalerror(200201021);
|
|
end;
|
|
end;
|
|
|
|
cg.a_cmp_const_loc_label(current_asmdata.CurrAsmList,opsize,hcond,
|
|
aint(cmp_const.svalue),left.location,l3);
|
|
end;
|
|
|
|
{ this is the break label: }
|
|
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrBreakLabel);
|
|
|
|
sync_regvars(false);
|
|
|
|
current_procinfo.CurrContinueLabel:=oldclabel;
|
|
current_procinfo.CurrBreakLabel:=oldblabel;
|
|
{ a break/continue in a while/repeat block can't be seen outside }
|
|
flowcontrol:=oldflowcontrol+(flowcontrol-[fc_break,fc_continue,fc_inflowcontrol]);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondExitN
|
|
*****************************************************************************}
|
|
|
|
procedure tcgexitnode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
include(flowcontrol,fc_exit);
|
|
if assigned(left) then
|
|
secondpass(left);
|
|
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,current_procinfo.CurrExitLabel);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondBreakN
|
|
*****************************************************************************}
|
|
|
|
procedure tcgbreaknode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
include(flowcontrol,fc_break);
|
|
if current_procinfo.CurrBreakLabel<>nil then
|
|
begin
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,current_procinfo.CurrBreakLabel)
|
|
end
|
|
else
|
|
CGMessage(cg_e_break_not_allowed);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondContinueN
|
|
*****************************************************************************}
|
|
|
|
procedure tcgcontinuenode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
include(flowcontrol,fc_continue);
|
|
if current_procinfo.CurrContinueLabel<>nil then
|
|
begin
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,current_procinfo.CurrContinueLabel)
|
|
end
|
|
else
|
|
CGMessage(cg_e_continue_not_allowed);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondGoto
|
|
*****************************************************************************}
|
|
|
|
procedure tcggotonode.pass_generate_code;
|
|
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
include(flowcontrol,fc_gotolabel);
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,tcglabelnode(labelnode).getasmlabel)
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondLabel
|
|
*****************************************************************************}
|
|
|
|
function tcglabelnode.getasmlabel : tasmlabel;
|
|
begin
|
|
if not(assigned(asmlabel)) then
|
|
{ labsym is not set in inlined procedures, but since assembler }
|
|
{ routines can't be inlined, that shouldn't matter }
|
|
if assigned(labsym) and
|
|
labsym.nonlocal then
|
|
current_asmdata.getglobaljumplabel(asmlabel)
|
|
else
|
|
current_asmdata.getjumplabel(asmlabel);
|
|
result:=asmlabel
|
|
end;
|
|
|
|
|
|
procedure tcglabelnode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
include(flowcontrol,fc_gotolabel);
|
|
{$ifdef OLDREGVARS}
|
|
load_all_regvars(current_asmdata.CurrAsmList);
|
|
{$endif OLDREGVARS}
|
|
cg.a_label(current_asmdata.CurrAsmList,getasmlabel);
|
|
|
|
{ Write also extra label if this label was referenced from
|
|
assembler block }
|
|
if assigned(labsym) and
|
|
assigned(labsym.asmblocklabel) then
|
|
cg.a_label(current_asmdata.CurrAsmList,labsym.asmblocklabel);
|
|
|
|
secondpass(left);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondRaise
|
|
*****************************************************************************}
|
|
|
|
procedure tcgraisenode.pass_generate_code;
|
|
|
|
var
|
|
a : tasmlabel;
|
|
href2: treference;
|
|
paraloc1,paraloc2,paraloc3 : tcgpara;
|
|
begin
|
|
paraloc1.init;
|
|
paraloc2.init;
|
|
paraloc3.init;
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.getintparaloc(pocall_default,2,paraloc2);
|
|
paramanager.getintparaloc(pocall_default,3,paraloc3);
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
if assigned(left) then
|
|
begin
|
|
{ multiple parameters? }
|
|
if assigned(right) then
|
|
begin
|
|
{ frame tree }
|
|
if assigned(third) then
|
|
secondpass(third);
|
|
secondpass(right);
|
|
end;
|
|
secondpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ Push parameters }
|
|
if assigned(right) then
|
|
begin
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc3);
|
|
{ frame tree }
|
|
if assigned(third) then
|
|
cg.a_param_loc(current_asmdata.CurrAsmList,third.location,paraloc3)
|
|
else
|
|
cg.a_param_const(current_asmdata.CurrAsmList,OS_INT,0,paraloc3);
|
|
{ push address }
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.a_param_loc(current_asmdata.CurrAsmList,right.location,paraloc2);
|
|
end
|
|
else
|
|
begin
|
|
{ get current address }
|
|
current_asmdata.getaddrlabel(a);
|
|
cg.a_label(current_asmdata.CurrAsmList,a);
|
|
reference_reset_symbol(href2,a,0,1);
|
|
{ push current frame }
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc3);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,NR_FRAME_POINTER_REG,paraloc3);
|
|
{ push current address }
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
if target_info.system <> system_powerpc_macos then
|
|
cg.a_paramaddr_ref(current_asmdata.CurrAsmList,href2,paraloc2)
|
|
else
|
|
cg.a_param_const(current_asmdata.CurrAsmList,OS_INT,0,paraloc2);
|
|
end;
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_loc(current_asmdata.CurrAsmList,left.location,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc3);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RAISEEXCEPTION',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end
|
|
else
|
|
begin
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
paraloc1.done;
|
|
paraloc2.done;
|
|
paraloc3.done;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondTryExcept
|
|
*****************************************************************************}
|
|
|
|
var
|
|
endexceptlabel : tasmlabel;
|
|
|
|
|
|
{ does the necessary things to clean up the object stack }
|
|
{ in the except block }
|
|
procedure cleanupobjectstack;
|
|
var
|
|
paraloc1 : tcgpara;
|
|
begin
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPOBJECTSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
paraloc1.init;
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,NR_FUNCTION_RESULT_REG,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_DESTROYEXCEPTION',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
paraloc1.done;
|
|
end;
|
|
|
|
|
|
procedure tcgtryexceptnode.pass_generate_code;
|
|
|
|
var
|
|
exceptlabel,doexceptlabel,oldendexceptlabel,
|
|
lastonlabel,
|
|
exitexceptlabel,
|
|
continueexceptlabel,
|
|
breakexceptlabel,
|
|
exittrylabel,
|
|
continuetrylabel,
|
|
breaktrylabel,
|
|
doobjectdestroy,
|
|
doobjectdestroyandreraise,
|
|
oldCurrExitLabel,
|
|
oldContinueLabel,
|
|
oldBreakLabel : tasmlabel;
|
|
oldflowcontrol,tryflowcontrol,
|
|
exceptflowcontrol : tflowcontrol;
|
|
destroytemps,
|
|
excepttemps : texceptiontemps;
|
|
paraloc1 : tcgpara;
|
|
label
|
|
errorexit;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
oldflowcontrol:=flowcontrol;
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
{ this can be called recursivly }
|
|
oldBreakLabel:=nil;
|
|
oldContinueLabel:=nil;
|
|
oldendexceptlabel:=endexceptlabel;
|
|
|
|
{ save the old labels for control flow statements }
|
|
oldCurrExitLabel:=current_procinfo.CurrExitLabel;
|
|
if assigned(current_procinfo.CurrBreakLabel) then
|
|
begin
|
|
oldContinueLabel:=current_procinfo.CurrContinueLabel;
|
|
oldBreakLabel:=current_procinfo.CurrBreakLabel;
|
|
end;
|
|
|
|
{ get new labels for the control flow statements }
|
|
current_asmdata.getjumplabel(exittrylabel);
|
|
current_asmdata.getjumplabel(exitexceptlabel);
|
|
if assigned(current_procinfo.CurrBreakLabel) then
|
|
begin
|
|
current_asmdata.getjumplabel(breaktrylabel);
|
|
current_asmdata.getjumplabel(continuetrylabel);
|
|
current_asmdata.getjumplabel(breakexceptlabel);
|
|
current_asmdata.getjumplabel(continueexceptlabel);
|
|
end;
|
|
|
|
current_asmdata.getjumplabel(exceptlabel);
|
|
current_asmdata.getjumplabel(doexceptlabel);
|
|
current_asmdata.getjumplabel(endexceptlabel);
|
|
current_asmdata.getjumplabel(lastonlabel);
|
|
|
|
get_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
new_exception(current_asmdata.CurrAsmList,excepttemps,exceptlabel);
|
|
|
|
{ try block }
|
|
{ set control flow labels for the try block }
|
|
current_procinfo.CurrExitLabel:=exittrylabel;
|
|
if assigned(oldBreakLabel) then
|
|
begin
|
|
current_procinfo.CurrContinueLabel:=continuetrylabel;
|
|
current_procinfo.CurrBreakLabel:=breaktrylabel;
|
|
end;
|
|
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
secondpass(left);
|
|
tryflowcontrol:=flowcontrol;
|
|
if codegenerror then
|
|
goto errorexit;
|
|
|
|
{ don't generate line info for internal cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoStart));
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,exceptlabel);
|
|
|
|
free_exception(current_asmdata.CurrAsmList, excepttemps, 0, endexceptlabel, false);
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,doexceptlabel);
|
|
|
|
{ end cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoEnd));
|
|
|
|
{ set control flow labels for the except block }
|
|
{ and the on statements }
|
|
current_procinfo.CurrExitLabel:=exitexceptlabel;
|
|
if assigned(oldBreakLabel) then
|
|
begin
|
|
current_procinfo.CurrContinueLabel:=continueexceptlabel;
|
|
current_procinfo.CurrBreakLabel:=breakexceptlabel;
|
|
end;
|
|
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
{ on statements }
|
|
if assigned(right) then
|
|
secondpass(right);
|
|
|
|
{ don't generate line info for internal cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoStart));
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,lastonlabel);
|
|
{ default handling except handling }
|
|
if assigned(t1) then
|
|
begin
|
|
{ FPC_CATCHES must be called with
|
|
'default handler' flag (=-1)
|
|
}
|
|
paraloc1.init;
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_const(current_asmdata.CurrAsmList,OS_ADDR,-1,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CATCHES',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
paraloc1.done;
|
|
|
|
{ the destruction of the exception object must be also }
|
|
{ guarded by an exception frame }
|
|
current_asmdata.getjumplabel(doobjectdestroy);
|
|
current_asmdata.getjumplabel(doobjectdestroyandreraise);
|
|
|
|
get_exception_temps(current_asmdata.CurrAsmList,destroytemps);
|
|
new_exception(current_asmdata.CurrAsmList,destroytemps,doobjectdestroyandreraise);
|
|
|
|
{ here we don't have to reset flowcontrol }
|
|
{ the default and on flowcontrols are handled equal }
|
|
secondpass(t1);
|
|
exceptflowcontrol:=flowcontrol;
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,doobjectdestroyandreraise);
|
|
|
|
free_exception(current_asmdata.CurrAsmList,destroytemps,0,doobjectdestroy,false);
|
|
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPSECONDOBJECTSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
|
|
paraloc1.init;
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR, NR_FUNCTION_RESULT_REG, paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_DESTROYEXCEPTION',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
paraloc1.done;
|
|
{ we don't need to restore esi here because reraise never }
|
|
{ returns }
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,doobjectdestroy);
|
|
cleanupobjectstack;
|
|
unget_exception_temps(current_asmdata.CurrAsmList,destroytemps);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,endexceptlabel);
|
|
end
|
|
else
|
|
begin
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
exceptflowcontrol:=flowcontrol;
|
|
end;
|
|
|
|
if fc_exit in exceptflowcontrol then
|
|
begin
|
|
{ do some magic for exit in the try block }
|
|
cg.a_label(current_asmdata.CurrAsmList,exitexceptlabel);
|
|
{ we must also destroy the address frame which guards }
|
|
{ exception object }
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cleanupobjectstack;
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldCurrExitLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
|
|
if fc_break in exceptflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,breakexceptlabel);
|
|
{ we must also destroy the address frame which guards }
|
|
{ exception object }
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cleanupobjectstack;
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldBreakLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
|
|
if fc_continue in exceptflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,continueexceptlabel);
|
|
{ we must also destroy the address frame which guards }
|
|
{ exception object }
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cleanupobjectstack;
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldContinueLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
|
|
if fc_exit in tryflowcontrol then
|
|
begin
|
|
{ do some magic for exit in the try block }
|
|
cg.a_label(current_asmdata.CurrAsmList,exittrylabel);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldCurrExitLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
|
|
if fc_break in tryflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,breaktrylabel);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldBreakLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
|
|
if fc_continue in tryflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,continuetrylabel);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPADDRSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldContinueLabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
unget_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
cg.a_label(current_asmdata.CurrAsmList,endexceptlabel);
|
|
|
|
{ end cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoEnd));
|
|
|
|
errorexit:
|
|
{ restore all saved labels }
|
|
endexceptlabel:=oldendexceptlabel;
|
|
|
|
{ restore the control flow labels }
|
|
current_procinfo.CurrExitLabel:=oldCurrExitLabel;
|
|
if assigned(oldBreakLabel) then
|
|
begin
|
|
current_procinfo.CurrContinueLabel:=oldContinueLabel;
|
|
current_procinfo.CurrBreakLabel:=oldBreakLabel;
|
|
end;
|
|
|
|
{ return all used control flow statements }
|
|
flowcontrol:=oldflowcontrol+(exceptflowcontrol +
|
|
tryflowcontrol - [fc_inflowcontrol]);
|
|
end;
|
|
|
|
|
|
procedure tcgonnode.pass_generate_code;
|
|
var
|
|
nextonlabel,
|
|
exitonlabel,
|
|
continueonlabel,
|
|
breakonlabel,
|
|
oldCurrExitLabel,
|
|
oldContinueLabel,
|
|
doobjectdestroyandreraise,
|
|
doobjectdestroy,
|
|
oldBreakLabel : tasmlabel;
|
|
oldflowcontrol : tflowcontrol;
|
|
excepttemps : texceptiontemps;
|
|
exceptref,
|
|
href2: treference;
|
|
paraloc1 : tcgpara;
|
|
exceptvarsym : tlocalvarsym;
|
|
begin
|
|
paraloc1.init;
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
oldflowcontrol:=flowcontrol;
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
current_asmdata.getjumplabel(nextonlabel);
|
|
|
|
{ send the vmt parameter }
|
|
reference_reset_symbol(href2,current_asmdata.RefAsmSymbol(excepttype.vmt_mangledname),0,sizeof(pint));
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_paramaddr_ref(current_asmdata.CurrAsmList,href2,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CATCHES',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
{ is it this catch? No. go to next onlabel }
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_ADDR,OC_EQ,0,NR_FUNCTION_RESULT_REG,nextonlabel);
|
|
|
|
{ Retrieve exception variable }
|
|
if assigned(excepTSymtable) then
|
|
exceptvarsym:=tlocalvarsym(excepTSymtable.SymList[0])
|
|
else
|
|
exceptvarsym:=nil;
|
|
|
|
if assigned(exceptvarsym) then
|
|
begin
|
|
exceptvarsym.localloc.loc:=LOC_REFERENCE;
|
|
exceptvarsym.localloc.size:=OS_ADDR;
|
|
tg.GetLocal(current_asmdata.CurrAsmList,sizeof(pint),voidpointertype,exceptvarsym.localloc.reference);
|
|
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_FUNCTION_RESULT_REG,exceptvarsym.localloc.reference);
|
|
end
|
|
else
|
|
begin
|
|
tg.GetTemp(current_asmdata.CurrAsmList,sizeof(pint),sizeof(pint),tt_normal,exceptref);
|
|
cg.a_load_reg_ref(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_FUNCTION_RESULT_REG,exceptref);
|
|
end;
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
|
|
{ in the case that another exception is risen
|
|
we've to destroy the old one }
|
|
current_asmdata.getjumplabel(doobjectdestroyandreraise);
|
|
|
|
{ call setjmp, and jump to finally label on non-zero result }
|
|
get_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
new_exception(current_asmdata.CurrAsmList,excepttemps,doobjectdestroyandreraise);
|
|
|
|
oldBreakLabel:=nil;
|
|
oldContinueLabel:=nil;
|
|
if assigned(right) then
|
|
begin
|
|
oldCurrExitLabel:=current_procinfo.CurrExitLabel;
|
|
current_asmdata.getjumplabel(exitonlabel);
|
|
current_procinfo.CurrExitLabel:=exitonlabel;
|
|
if assigned(current_procinfo.CurrBreakLabel) then
|
|
begin
|
|
oldContinueLabel:=current_procinfo.CurrContinueLabel;
|
|
oldBreakLabel:=current_procinfo.CurrBreakLabel;
|
|
current_asmdata.getjumplabel(breakonlabel);
|
|
current_asmdata.getjumplabel(continueonlabel);
|
|
current_procinfo.CurrContinueLabel:=continueonlabel;
|
|
current_procinfo.CurrBreakLabel:=breakonlabel;
|
|
end;
|
|
|
|
secondpass(right);
|
|
end;
|
|
|
|
{ don't generate lineinfo for internal cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoStart));
|
|
|
|
current_asmdata.getjumplabel(doobjectdestroy);
|
|
cg.a_label(current_asmdata.CurrAsmList,doobjectdestroyandreraise);
|
|
|
|
free_exception(current_asmdata.CurrAsmList,excepttemps,0,doobjectdestroy,false);
|
|
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_POPSECONDOBJECTSTACK',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR, NR_FUNCTION_RESULT_REG, paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_DESTROYEXCEPTION',false);
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
{ we don't need to store/restore registers here because reraise never
|
|
returns }
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,doobjectdestroy);
|
|
cleanupobjectstack;
|
|
{ clear some stuff }
|
|
if assigned(exceptvarsym) then
|
|
begin
|
|
tg.UngetLocal(current_asmdata.CurrAsmList,exceptvarsym.localloc.reference);
|
|
exceptvarsym.localloc.loc:=LOC_INVALID;
|
|
end
|
|
else
|
|
tg.Ungettemp(current_asmdata.CurrAsmList,exceptref);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,endexceptlabel);
|
|
|
|
if assigned(right) then
|
|
begin
|
|
{ special handling for control flow instructions }
|
|
if fc_exit in flowcontrol then
|
|
begin
|
|
{ the address and object pop does secondtryexcept }
|
|
cg.a_label(current_asmdata.CurrAsmList,exitonlabel);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldCurrExitLabel);
|
|
end;
|
|
|
|
if fc_break in flowcontrol then
|
|
begin
|
|
{ the address and object pop does secondtryexcept }
|
|
cg.a_label(current_asmdata.CurrAsmList,breakonlabel);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldBreakLabel);
|
|
end;
|
|
|
|
if fc_continue in flowcontrol then
|
|
begin
|
|
{ the address and object pop does secondtryexcept }
|
|
cg.a_label(current_asmdata.CurrAsmList,continueonlabel);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,oldContinueLabel);
|
|
end;
|
|
|
|
current_procinfo.CurrExitLabel:=oldCurrExitLabel;
|
|
if assigned(oldBreakLabel) then
|
|
begin
|
|
current_procinfo.CurrContinueLabel:=oldContinueLabel;
|
|
current_procinfo.CurrBreakLabel:=oldBreakLabel;
|
|
end;
|
|
end;
|
|
|
|
unget_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
cg.a_label(current_asmdata.CurrAsmList,nextonlabel);
|
|
flowcontrol:=oldflowcontrol+(flowcontrol-[fc_inflowcontrol]);
|
|
paraloc1.done;
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoEnd));
|
|
|
|
{ next on node }
|
|
if assigned(left) then
|
|
secondpass(left);
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
SecondTryFinally
|
|
*****************************************************************************}
|
|
|
|
procedure tcgtryfinallynode.pass_generate_code;
|
|
var
|
|
reraiselabel,
|
|
finallylabel,
|
|
endfinallylabel,
|
|
exitfinallylabel,
|
|
continuefinallylabel,
|
|
breakfinallylabel,
|
|
oldCurrExitLabel,
|
|
oldContinueLabel,
|
|
oldBreakLabel : tasmlabel;
|
|
oldflowcontrol,tryflowcontrol : tflowcontrol;
|
|
decconst : longint;
|
|
excepttemps : texceptiontemps;
|
|
retsym: tlocalvarsym;
|
|
begin
|
|
location_reset(location,LOC_VOID,OS_NO);
|
|
|
|
{ check if child nodes do a break/continue/exit }
|
|
oldflowcontrol:=flowcontrol;
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
current_asmdata.getjumplabel(finallylabel);
|
|
current_asmdata.getjumplabel(endfinallylabel);
|
|
current_asmdata.getjumplabel(reraiselabel);
|
|
|
|
{ the finally block must catch break, continue and exit }
|
|
{ statements }
|
|
oldCurrExitLabel:=current_procinfo.CurrExitLabel;
|
|
if implicitframe then
|
|
exitfinallylabel:=finallylabel
|
|
else
|
|
current_asmdata.getjumplabel(exitfinallylabel);
|
|
current_procinfo.CurrExitLabel:=exitfinallylabel;
|
|
if assigned(current_procinfo.CurrBreakLabel) then
|
|
begin
|
|
oldContinueLabel:=current_procinfo.CurrContinueLabel;
|
|
oldBreakLabel:=current_procinfo.CurrBreakLabel;
|
|
if implicitframe then
|
|
begin
|
|
breakfinallylabel:=finallylabel;
|
|
continuefinallylabel:=finallylabel;
|
|
end
|
|
else
|
|
begin
|
|
current_asmdata.getjumplabel(breakfinallylabel);
|
|
current_asmdata.getjumplabel(continuefinallylabel);
|
|
end;
|
|
current_procinfo.CurrContinueLabel:=continuefinallylabel;
|
|
current_procinfo.CurrBreakLabel:=breakfinallylabel;
|
|
end;
|
|
|
|
{ call setjmp, and jump to finally label on non-zero result }
|
|
get_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
new_exception(current_asmdata.CurrAsmList,excepttemps,finallylabel);
|
|
|
|
{ try code }
|
|
if assigned(left) then
|
|
begin
|
|
secondpass(left);
|
|
tryflowcontrol:=flowcontrol;
|
|
if codegenerror then
|
|
exit;
|
|
end;
|
|
|
|
{ don't generate line info for internal cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoStart));
|
|
|
|
cg.a_label(current_asmdata.CurrAsmList,finallylabel);
|
|
{ just free the frame information }
|
|
free_exception(current_asmdata.CurrAsmList,excepttemps,1,finallylabel,true);
|
|
|
|
{ end cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoEnd));
|
|
|
|
{ finally code }
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
secondpass(right);
|
|
{ goto is allowed if it stays inside the finally block,
|
|
this is checked using the exception block number }
|
|
if (flowcontrol-[fc_gotolabel])<>[fc_inflowcontrol] then
|
|
CGMessage(cg_e_control_flow_outside_finally);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
{ don't generate line info for internal cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoStart));
|
|
|
|
{ the value should now be in the exception handler }
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
if implicitframe then
|
|
begin
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,endfinallylabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
{ finally code only needed to be executed on exception }
|
|
flowcontrol:=[fc_inflowcontrol];
|
|
secondpass(t1);
|
|
if flowcontrol<>[fc_inflowcontrol] then
|
|
CGMessage(cg_e_control_flow_outside_finally);
|
|
if codegenerror then
|
|
exit;
|
|
{$if defined(x86) or defined(arm)}
|
|
if (target_info.system in systems_all_windows) and
|
|
(current_procinfo.procdef.proccalloption=pocall_safecall) then
|
|
begin
|
|
{ find safe_result variable we created in the generate_except_block }
|
|
retsym:=tlocalvarsym(current_procinfo.procdef.localst.Find('safe_result'));
|
|
{ Set return value of safecall procedure to indicate exception. }
|
|
{ Exception will be raised after procedure exit based on return value }
|
|
cg.a_reg_alloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_INT,retsym.localloc,NR_FUNCTION_RESULT_REG);
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end
|
|
else
|
|
{$endif}
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
end
|
|
else
|
|
begin
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,endfinallylabel);
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,1,NR_FUNCTION_RESULT_REG);
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,reraiselabel);
|
|
if fc_exit in tryflowcontrol then
|
|
begin
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,1,NR_FUNCTION_RESULT_REG);
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,oldCurrExitLabel);
|
|
decconst:=1;
|
|
end
|
|
else
|
|
decconst:=2;
|
|
if fc_break in tryflowcontrol then
|
|
begin
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,decconst,NR_FUNCTION_RESULT_REG);
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,oldBreakLabel);
|
|
decconst:=1;
|
|
end
|
|
else
|
|
inc(decconst);
|
|
if fc_continue in tryflowcontrol then
|
|
begin
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,decconst,NR_FUNCTION_RESULT_REG);
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_EQ,0,NR_FUNCTION_RESULT_REG,oldContinueLabel);
|
|
end;
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
cg.a_label(current_asmdata.CurrAsmList,reraiselabel);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RERAISE',false);
|
|
{ do some magic for exit,break,continue in the try block }
|
|
if fc_exit in tryflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,exitfinallylabel);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.g_exception_reason_save_const(current_asmdata.CurrAsmList,excepttemps.reasonbuf,2);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,finallylabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
if fc_break in tryflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,breakfinallylabel);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.g_exception_reason_save_const(current_asmdata.CurrAsmList,excepttemps.reasonbuf,3);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,finallylabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
if fc_continue in tryflowcontrol then
|
|
begin
|
|
cg.a_label(current_asmdata.CurrAsmList,continuefinallylabel);
|
|
cg.g_exception_reason_load(current_asmdata.CurrAsmList,excepttemps.reasonbuf);
|
|
cg.g_exception_reason_save_const(current_asmdata.CurrAsmList,excepttemps.reasonbuf,4);
|
|
cg.a_jmp_always(current_asmdata.CurrAsmList,finallylabel);
|
|
{ from g_exception_reason_load }
|
|
cg.a_reg_dealloc(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
|
|
end;
|
|
end;
|
|
unget_exception_temps(current_asmdata.CurrAsmList,excepttemps);
|
|
cg.a_label(current_asmdata.CurrAsmList,endfinallylabel);
|
|
|
|
{ end cleanup }
|
|
current_asmdata.CurrAsmList.concat(tai_marker.create(mark_NoLineInfoEnd));
|
|
|
|
current_procinfo.CurrExitLabel:=oldCurrExitLabel;
|
|
if assigned(current_procinfo.CurrBreakLabel) then
|
|
begin
|
|
current_procinfo.CurrContinueLabel:=oldContinueLabel;
|
|
current_procinfo.CurrBreakLabel:=oldBreakLabel;
|
|
end;
|
|
flowcontrol:=oldflowcontrol+(tryflowcontrol-[fc_inflowcontrol]);
|
|
end;
|
|
|
|
|
|
begin
|
|
cwhilerepeatnode:=tcgwhilerepeatnode;
|
|
cifnode:=tcgifnode;
|
|
cfornode:=tcgfornode;
|
|
cexitnode:=tcgexitnode;
|
|
cbreaknode:=tcgbreaknode;
|
|
ccontinuenode:=tcgcontinuenode;
|
|
cgotonode:=tcggotonode;
|
|
clabelnode:=tcglabelnode;
|
|
craisenode:=tcgraisenode;
|
|
ctryexceptnode:=tcgtryexceptnode;
|
|
ctryfinallynode:=tcgtryfinallynode;
|
|
connode:=tcgonnode;
|
|
end.
|