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a25ebbba3e
o separate information for reading and writing, because e.g. in a
try-block, only the writes to local variables and parameters are
volatile (they have to be committed immediately in case the next
instruction causes an exception)
o for now, only references to absolute memory addresses are marked
as volatile
o the volatily information is (should be) properly maintained throughout
all code generators for all archictures with this patch
o no optimizers or other compiler infrastructure uses the volatility
information yet
o this functionality is not (yet) exposed at the language level, it
is only for internal code generator use right now
git-svn-id: trunk@34996 -
72 lines
2.0 KiB
ObjectPascal
72 lines
2.0 KiB
ObjectPascal
{
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Copyright (c) 1998-2007 by Florian Klaempfl and Peter Vreman
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Contains abstract assembler instructions for all processor
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types, including routines which depend on the symbol table.
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These cannot be in aasmtai, because the symbol table units
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depend on that one.
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* Portions of this code was inspired by the NASM sources
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The Netwide Assembler is Copyright (c) 1996 Simon Tatham and
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Julian Hall. All rights reserved.
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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 aasmsym;
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{$i fpcdefs.inc}
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interface
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uses
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aasmtai;
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type
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tai_cpu_abstract_sym = class(tai_cpu_abstract)
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protected
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procedure ppubuildderefimploper(var o:toper);override;
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procedure ppuderefoper(var o:toper);override;
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end;
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implementation
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uses
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symsym;
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procedure tai_cpu_abstract_sym.ppubuildderefimploper(var o:toper);
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begin
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case o.typ of
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top_local :
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o.localoper^.localsymderef.build(tlocalvarsym(o.localoper^.localsym));
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end;
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end;
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procedure tai_cpu_abstract_sym.ppuderefoper(var o:toper);
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begin
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case o.typ of
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top_ref :
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begin
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end;
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top_local :
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o.localoper^.localsym:=tlocalvarsym(o.localoper^.localsymderef.resolve);
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end;
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end;
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end.
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