638e383e25
* 86numaux.adb, a-tigeau.ads, a-wtgeau.ads, decl.c, exp_ch6.adb, exp_ch9.adb, exp_util.adb, fname-sf.ads, freeze.ads, g-awk.adb, g-comlin.ads, g-dirope.adb, g-dyntab.ads, g-socket.ads, g-table.ads, g-traceb.ads, gnat-style.texi, gnatchop.adb, init.c, layout.adb, layout.ads, mdllfile.ads, mlib-fil.ads, osint.ads, s-fatgen.adb, s-imgrea.adb, s-taprop.ads, s-tasdeb.ads, sem_aggr.adb, sem_attr.adb, sem_case.ads, sem_ch13.adb, sem_ch3.adb, sem_elab.adb, sem_maps.ads, sem_res.adb, sem_util.ads, sinfo.ads, sinput.ads, table.adb, table.ads, types.ads, urealp.adb: Fix spelling errors. From-SVN: r46581
80 lines
4.7 KiB
Ada
80 lines
4.7 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- L A Y O U T --
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-- --
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-- S p e c --
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-- --
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-- $Revision: 1.1 $
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-- --
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-- Copyright (C) 2000-2001 Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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-- This package does front-end layout of types and objects. The result is
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-- to annotate the tree with information on size and alignment of types
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-- and objects. How much layout is performed depends on the setting of the
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-- target dependent parameter Backend_Layout.
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with Types; use Types;
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package Layout is
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-- The following procedures are called from Freeze, so all entities
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-- for types and objects that get frozen (which should be all such
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-- entities which are seen by the back end) will get layed out by one
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-- of these two procedures.
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procedure Layout_Type (E : Entity_Id);
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-- This procedure may set or adjust the fields Esize, RM_Size and
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-- Alignment in the non-generic type or subtype entity E. If the
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-- Backend_Layout switch is False, then it is guaranteed that all
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-- three fields will be properly set on return. Regardless of the
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-- Backend_Layout value, it is guaranteed that all discrete types
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-- will have both Esize and RM_Size fields set on return (since
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-- these are static values). Note that Layout_Type is not called
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-- for generic types, since these play no part in code generation,
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-- and hence representation aspects are irrelevant.
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procedure Layout_Object (E : Entity_Id);
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-- E is either a variable (E_Variable), a constant (E_Constant),
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-- a loop parameter (E_Loop_Parameter), or a formal parameter of
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-- a non-generic subprogram (E_In_Parameter, E_In_Out_Parameter,
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-- or E_Out_Parameter). This procedure may set or adjust the
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-- Esize and Alignment fields of E. If Backend_Layout is False,
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-- then it is guaranteed that both fields will be properly set
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-- on return. If the Esize is still unknown in the latter case,
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-- it means that the object must be allocated dynamically, since
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-- its length is not known at compile time.
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procedure Set_Discrete_RM_Size (Def_Id : Entity_Id);
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-- Set proper RM_Size for discrete size, this is normally the minimum
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-- number of bits to accommodate the range given, except in the case
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-- where the subtype statically matches the first subtype, in which
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-- case the size must be copied from the first subtype. For generic
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-- types, the RM_Size is simply set to zero. This routine also sets
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-- the Is_Constrained flag in Def_Id.
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procedure Set_Prim_Alignment (E : Entity_Id);
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-- The front end always sets alignments for primitive types by calling this
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-- procedure. Note that we have to do this for discrete types (since the
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-- Alignment attribute is static), so we might as well do it for all
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-- scalar types, since the processing is the same.
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end Layout;
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