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48ef33a8b3
o ensure that the label's local "jumpbuf" variable gets moved to the
parentfpstruct soon enough
o don't generate global symbols for interprocedural labels: they're not
necessary if they are only used via setjmp/longjmp (all references are
local in that case), and if they are referenced via an assembler block
then we'll have to handle them by passing a blockaddress() expression
as parameter to that assembler block (which does not require a global
symbol, but which is not yet implemented)
git-svn-id: trunk@34946 -
68 lines
2.2 KiB
ObjectPascal
68 lines
2.2 KiB
ObjectPascal
{
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Copyright (c) 2016 by Jonas Maebe
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Generate assembler for nodes that influence the flow for llvm
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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 nllvmflw;
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{$i fpcdefs.inc}
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interface
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uses
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aasmbase,
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nflw, ncgflw, ncgnstfl;
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type
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tllvmlabelnode = class(tcglabelnode)
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function getasmlabel: tasmlabel; override;
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end;
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implementation
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{*****************************************************************************
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SecondLabel
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*****************************************************************************}
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uses
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aasmdata;
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function tllvmlabelnode.getasmlabel: tasmlabel;
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begin
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{ don't allocate global labels even if the label is accessed from
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another routine: we always have to refer to such labels using the
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blockaddress() construct, which works with local labels too.
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Additionally, LLVM does not support defining global labels in the
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middle of a routine -> jumping to such a label from assembler code
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from another function will not work anyway (have to handle that by
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passing a blockaddress as argument to an assembler block, although
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"some targets may provide defined semantics when using the value as
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the operand to an inline assembly") }
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if not(assigned(asmlabel)) then
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current_asmdata.getjumplabel(asmlabel);
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result:=asmlabel
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end;
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begin
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clabelnode:=tllvmlabelnode;
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end.
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