* 41intnam.ads, 42intnam.ads, 4aintnam.ads, 4cintnam.ads,

	4dintnam.ads, 4gintnam.ads, 4hintnam.ads, 4lintnam.ads,
	4mintnam.ads, 4pintnam.ads, 4rintnam.ads, 4sintnam.ads,
	4uintnam.ads, 4vcalend.adb, 4zintnam.ads, 52system.ads,
	5amastop.adb, 5asystem.ads, 5ataprop.adb, 5atpopsp.adb,
	5avxwork.ads, 5bosinte.adb, 5bsystem.ads, 5esystem.ads,
	5fsystem.ads, 5ftaprop.adb, 5ginterr.adb, 5gmastop.adb,
	5gsystem.ads, 5gtaprop.adb, 5gtasinf.adb, 5gtasinf.ads,
	5hparame.ads, 5hsystem.ads, 5htaprop.adb, 5htraceb.adb,
	5itaprop.adb, 5ksystem.ads, 5kvxwork.ads, 5lintman.adb,
	5lsystem.ads, 5mvxwork.ads, 5ninmaop.adb, 5nosinte.ads,
	5ntaprop.adb, 5ointerr.adb, 5omastop.adb, 5oosinte.adb,
	5osystem.ads, 5otaprop.adb, 5otaspri.ads, 5pvxwork.ads,
	5qtaprop.adb, 5sintman.adb, 5ssystem.ads, 5staprop.adb,
	5stpopse.adb, 5svxwork.ads, 5tosinte.ads, 5uintman.adb,
	5vasthan.adb, 5vinmaop.adb, 5vinterr.adb, 5vintman.adb,
	5vmastop.adb, 5vparame.ads, 5vsystem.ads, 5vtaprop.adb,
	5vtpopde.adb, 5wmemory.adb, 5wsystem.ads, 5wtaprop.adb,
	5ysystem.ads, 5zinterr.adb, 5zintman.adb, 5zosinte.adb,
	5zosinte.ads, 5zsystem.ads, 5ztaprop.adb, 6vcpp.adb, 6vcstrea.adb,
	7sintman.adb, 7staprop.adb, 7stpopsp.adb, 9drpc.adb,
	Make-lang.in, Makefile.in, a-caldel.adb, a-comlin.ads,
	a-dynpri.adb, a-except.adb, a-except.ads, a-finali.adb,
	a-ncelfu.ads, a-reatim.adb, a-retide.adb, a-stream.ads,
	a-ststio.adb, a-ststio.ads, a-stwifi.adb, a-tags.adb, a-tasatt.adb,
	a-textio.adb, a-tideau.adb, a-tiflau.adb, a-tigeau.adb,
	a-tigeau.ads, a-tiinau.adb, a-timoau.adb, a-witeio.adb,
	a-wtdeau.adb, a-wtenau.adb, a-wtflau.adb, a-wtgeau.adb,
	a-wtgeau.ads, a-wtinau.adb, a-wtmoau.adb, ada-tree.def, ada-tree.h,
	adaint.c, adaint.h, ali-util.adb, ali.adb, ali.ads, atree.adb,
	atree.ads, atree.h, back_end.adb, bcheck.adb, bindgen.adb,
	bindusg.adb, checks.adb, comperr.adb, config-lang.in, csets.adb,
	csets.ads, cstand.adb, cstreams.c, debug.adb, debug.ads, decl.c,
	einfo.adb, einfo.ads, einfo.h, elists.h, errout.adb, errout.ads,
	eval_fat.adb, exp_aggr.adb, exp_attr.adb, exp_ch11.adb,
	exp_ch12.adb, exp_ch13.adb, exp_ch2.adb, exp_ch3.adb, exp_ch3.ads,
	exp_ch4.adb, exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_ch7.ads,
	exp_ch9.adb, exp_ch9.ads, exp_dbug.adb, exp_dbug.ads, exp_disp.ads,
	exp_dist.adb, exp_fixd.adb, exp_intr.adb, exp_pakd.adb,
	exp_prag.adb, exp_strm.adb, exp_util.adb, exp_util.ads,
	expander.adb, expect.c, fe.h, fmap.adb, fmap.ads, fname-uf.adb,
	freeze.adb, frontend.adb, g-awk.adb, g-cgideb.adb, g-comlin.adb,
	g-comlin.ads, g-debpoo.adb, g-dirope.adb, g-dirope.ads,
	g-dyntab.adb, g-expect.adb, g-expect.ads, g-io.ads, g-io_aux.adb,
	g-io_aux.ads, g-locfil.adb, g-locfil.ads, g-os_lib.adb,
	g-os_lib.ads, g-regexp.adb, g-regpat.adb, g-socket.adb,
	g-socket.ads, g-spipat.adb, g-table.adb, g-trasym.adb,
	g-trasym.ads, gigi.h, gmem.c, gnat1drv.adb, gnatbind.adb, gnatbl.c,
	gnatchop.adb, gnatcmd.adb, gnatdll.adb, gnatfind.adb, gnatlbr.adb,
	gnatlink.adb, gnatls.adb, gnatmem.adb, gnatprep.adb, gnatvsn.ads,
	gnatxref.adb, hlo.adb, hostparm.ads, i-cobol.adb, i-cpp.adb,
	i-cstrea.ads, i-cstrin.adb, i-pacdec.adb, i-vxwork.ads,
	impunit.adb, init.c, inline.adb, io-aux.c, layout.adb, lib-load.adb,
	lib-util.adb, lib-writ.adb, lib-writ.ads, lib-xref.adb,
	lib-xref.ads, lib.adb, lib.ads, make.adb, makeusg.adb, mdll.adb,
	memroot.adb, misc.c, mlib-tgt.adb, mlib-utl.adb, mlib-utl.ads,
	mlib.adb, namet.adb, namet.ads, namet.h, nlists.h, nmake.adb,
	nmake.ads, nmake.adt, opt.adb, opt.ads, osint.adb, osint.ads,
	output.adb, output.ads, par-ch2.adb, par-ch3.adb, par-ch5.adb,
	par-prag.adb, par-tchk.adb, par-util.adb, par.adb, prj-attr.adb,
	prj-dect.adb, prj-env.adb, prj-env.ads, prj-nmsc.adb, prj-part.adb,
	prj-proc.adb, prj-strt.adb, prj-tree.adb, prj-tree.ads, prj.adb,
	prj.ads, raise.c, raise.h, repinfo.adb, restrict.adb, restrict.ads,
	rident.ads, rtsfind.adb, rtsfind.ads, s-arit64.adb, s-asthan.adb,
	s-atacco.adb, s-atacco.ads, s-auxdec.adb, s-crc32.adb, s-crc32.ads,
	s-direio.adb, s-fatgen.adb, s-fileio.adb, s-finimp.adb,
	s-gloloc.adb, s-gloloc.ads, s-interr.adb, s-mastop.adb,
	s-mastop.ads, s-memory.adb, s-parame.ads, s-parint.adb,
	s-pooglo.adb, s-pooloc.adb, s-rpc.adb, s-secsta.adb, s-sequio.adb,
	s-shasto.adb, s-soflin.adb, s-soflin.ads, s-stache.adb,
	s-taasde.adb, s-taasde.ads, s-tadeca.adb, s-tadeca.ads,
	s-tadert.adb, s-tadert.ads, s-taenca.adb, s-taenca.ads,
	s-taprob.adb, s-taprop.ads, s-tarest.adb, s-tasdeb.adb,
	s-tasini.adb, s-tasini.ads, s-taskin.adb, s-taskin.ads,
	s-tasque.adb, s-tasque.ads, s-tasren.adb, s-tasren.ads,
	s-tassta.adb, s-tasuti.adb, s-tasuti.ads, s-tataat.adb,
	s-tataat.ads, s-tpoben.adb, s-tpoben.ads, s-tpobop.adb,
	s-tposen.adb, s-tposen.ads, s-traceb.adb, s-traceb.ads,
	s-unstyp.ads, s-widenu.adb, scn-nlit.adb, scn.adb, sem.adb,
	sem_aggr.adb, sem_attr.adb, sem_attr.ads, sem_case.adb,
	sem_ch10.adb, sem_ch11.adb, sem_ch11.ads, sem_ch12.adb,
	sem_ch13.adb, sem_ch13.ads, sem_ch2.adb, sem_ch3.adb, sem_ch3.ads,
	sem_ch4.adb, sem_ch5.adb, sem_ch6.adb, sem_ch6.ads, sem_ch7.adb,
	sem_ch8.adb, sem_ch8.ads, sem_ch9.adb, sem_disp.adb, sem_dist.adb,
	sem_elab.adb, sem_elim.adb, sem_elim.ads, sem_eval.adb,
	sem_intr.adb, sem_mech.adb, sem_prag.adb, sem_res.adb,
	sem_type.adb, sem_util.adb, sem_util.ads, sem_vfpt.adb,
	sem_warn.adb, sinfo.adb, sinfo.ads, sinfo.h, sinput-l.adb,
	sinput-l.ads, sinput.adb, sinput.ads, snames.adb, snames.ads,
	snames.h, sprint.adb, sprint.ads, stringt.adb, stringt.ads,
	stringt.h, style.adb, switch.adb, switch.ads, sysdep.c, system.ads,
	table.adb, targparm.adb, targparm.ads, targtyps.c, tbuild.adb,
	tbuild.ads, tracebak.c, trans.c, tree_gen.adb, tree_io.adb,
	treepr.adb, treepr.ads, treeprs.ads, treeprs.adt, ttypes.ads,
	types.adb, types.ads, types.h, uintp.ads, urealp.ads, usage.adb,
	utils.c, utils2.c, validsw.adb, xnmake.adb, xr_tabls.adb,
	xr_tabls.ads, xref_lib.adb, xref_lib.ads : Merge in ACT changes.

	* 1ssecsta.adb, 1ssecsta.ads, a-chlat9.ads, a-cwila9.ads,
	g-enblsp.adb, g-md5.adb, g-md5.ads, gnatname.adb, gnatname.ads,
	mkdir.c, osint-b.adb, osint-b.ads, osint-c.adb, osint-c.ads,
	osint-l.adb, osint-l.ads, osint-m.adb, osint-m.ads : New files

	* 3lsoccon.ads, 5qparame.ads, 5qvxwork.ads, 5smastop.adb,
	5zparame.ads, gnatmain.adb, gnatmain.ads, gnatpsys.adb : Removed

	* mdllfile.adb, mdllfile.ads, mdlltool.adb, mdlltool.ads : Renamed
	to mdll-fil.ad[bs] and mdll-util.ad[bs]

	* mdll-fil.adb, mdll-fil.ads, mdll-utl.adb, mdll-utl.ads : Renamed
	from mdllfile.ad[bs] and mdlltool.ad[bs]


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50451 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 77 insertions, 39 deletions

diff --git a/gcc/ada/exp_ch5.adb b/gcc/ada/exp_ch5.adb
index 110249f0c16..509738929aa 100644
--- a/gcc/ada/exp_ch5.adb
+++ b/gcc/ada/exp_ch5.adb
@@ -6,9 +6,9 @@
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---                            $Revision: 1.3 $
+--                            $Revision$
 --                                                                          --
---          Copyright (C) 1992-2001, Free Software Foundation, Inc.         --
+--          Copyright (C) 1992-2002, Free Software Foundation, Inc.         --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -311,12 +311,6 @@ package body Exp_Ch5 is
       --  Note: overlap is never possible if there is a change of
       --  representation, so we can exclude this case
 
-      --  In the case of compiling for the Java Virtual Machine,
-      --  slices are always passed by making a copy, so we don't
-      --  have to worry about overlap. We also want to prevent
-      --  generation of "<" comparisons for array addresses,
-      --  since that's a meaningless operation on the JVM.
-
       if Ndim = 1
         and then not Crep
         and then
@@ -325,6 +319,13 @@ package body Exp_Ch5 is
             (Lhs_Formal and Rhs_Non_Local_Var)
               or else
             (Rhs_Formal and Lhs_Non_Local_Var))
+
+         --  In the case of compiling for the Java Virtual Machine,
+         --  slices are always passed by making a copy, so we don't
+         --  have to worry about overlap. We also want to prevent
+         --  generation of "<" comparisons for array addresses,
+         --  since that's a meaningless operation on the JVM.
+
         and then not Java_VM
       then
          Set_Forwards_OK  (N, False);
@@ -352,15 +353,24 @@ package body Exp_Ch5 is
       elsif Has_Controlled_Component (L_Type) then
          Loop_Required := True;
 
-      --  The only remaining cases involve slice assignments. If no slices
-      --  are involved, then the assignment can definitely be handled by gigi.
-      --  unless we have the parameter case mentioned above.
+      --  Case where no slice is involved
 
       elsif not L_Slice and not R_Slice then
 
-         --  The following is temporary code??? It is not clear why it is
-         --  necessary. For further investigation, look at the following
-         --  short program which fails:
+         --  The following code deals with the case of unconstrained bit
+         --  packed arrays. The problem is that the template for such
+         --  arrays contains the bounds of the actual source level array,
+
+         --  But the copy of an entire array requires the bounds of the
+         --  underlying array. It would be nice if the back end could take
+         --  care of this, but right now it does not know how, so if we
+         --  have such a type, then we expand out into a loop, which is
+         --  inefficient but works correctly. If we don't do this, we
+         --  get the wrong length computed for the array to be moved.
+         --  The two cases we need to worry about are:
+
+         --  Explicit deference of an unconstrained packed array type as
+         --  in the following example:
 
          --    procedure C52 is
          --       type BITS is array(INTEGER range <>) of BOOLEAN;
@@ -373,22 +383,45 @@ package body Exp_Ch5 is
          --       P2.ALL := P1.ALL;
          --    end C52;
 
-         --  To deal with the above, we expand out if either of the operands
-         --  is an explicit dereference to an unconstrained bit packed array.
+         --  A formal parameter reference with an unconstrained bit
+         --  array type is the other case we need to worry about (here
+         --  we assume the same BITS type declared above:
+
+         --    procedure Write_All (File : out BITS; Contents : in  BITS);
+         --    begin
+         --       File.Storage := Contents;
+         --    end Write_All;
+
+         --  We expand to a loop in either of these two cases.
+
+         --  Question for future thought. Another potentially more efficient
+         --  approach would be to create the actual subtype, and then do an
+         --  unchecked conversion to this actual subtype ???
 
-         Temporary_Code : declare
-            function Is_Deref_Of_UBP (Opnd : Node_Id) return Boolean;
-            --  Function to perform required test for special case above
+         Check_Unconstrained_Bit_Packed_Array : declare
 
-            function Is_Deref_Of_UBP (Opnd : Node_Id) return Boolean is
+            function Is_UBPA_Reference (Opnd : Node_Id) return Boolean;
+            --  Function to perform required test for the first case,
+            --  above (dereference of an unconstrained bit packed array)
+
+            -----------------------
+            -- Is_UBPA_Reference --
+            -----------------------
+
+            function Is_UBPA_Reference (Opnd : Node_Id) return Boolean is
+               Typ      : constant Entity_Id := Underlying_Type (Etype (Opnd));
                P_Type   : Entity_Id;
                Des_Type : Entity_Id;
 
             begin
-               if Nkind (Opnd) /= N_Explicit_Dereference then
-                  return False;
-               else
-                  P_Type := Etype (Prefix (Opnd));
+               if Present (Packed_Array_Type (Typ))
+                 and then Is_Array_Type (Packed_Array_Type (Typ))
+                 and then not Is_Constrained (Packed_Array_Type (Typ))
+               then
+                  return True;
+
+               elsif Nkind (Opnd) = N_Explicit_Dereference then
+                  P_Type := Underlying_Type (Etype (Prefix (Opnd)));
 
                   if not Is_Access_Type (P_Type) then
                      return False;
@@ -399,24 +432,32 @@ package body Exp_Ch5 is
                        Is_Bit_Packed_Array (Des_Type)
                          and then not Is_Constrained (Des_Type);
                   end if;
+
+               else
+                  return False;
                end if;
-            end Is_Deref_Of_UBP;
+            end Is_UBPA_Reference;
 
-         --  Start of processing for temporary code
+         --  Start of processing for Check_Unconstrained_Bit_Packed_Array
 
          begin
-            if Is_Deref_Of_UBP (Lhs)
+            if Is_UBPA_Reference (Lhs)
                  or else
-               Is_Deref_Of_UBP (Rhs)
+               Is_UBPA_Reference (Rhs)
             then
                Loop_Required := True;
 
-            --  Normal case (will be only case when above temp code removed ???
+            --  Here if we do not have the case of a reference to a bit
+            --  packed unconstrained array case. In this case gigi can
+            --  most certainly handle the assignment if a forwards move
+            --  is allowed.
+
+            --  (could it handle the backwards case also???)
 
             elsif Forwards_OK (N) then
                return;
             end if;
-         end Temporary_Code;
+         end Check_Unconstrained_Bit_Packed_Array;
 
       --  Gigi can always handle the assignment if the right side is a string
       --  literal (note that overlap is definitely impossible in this case).
@@ -1498,7 +1539,10 @@ package body Exp_Ch5 is
                               Exception_Choices =>
                                 New_List (Make_Others_Choice (Loc)),
                               Statements        => New_List (
-                                Make_Raise_Program_Error (Loc)))))));
+                                Make_Raise_Program_Error (Loc,
+                                  Reason =>
+                                    PE_Finalize_Raised_Exception)
+                              ))))));
                end if;
             end if;
 
@@ -2378,7 +2422,8 @@ package body Exp_Ch5 is
                     Right_Opnd =>
                       Unchecked_Convert_To (RTE (RE_Tag),
                         New_Reference_To
-                          (Access_Disp_Table (Base_Type (Utyp)), Loc)))));
+                          (Access_Disp_Table (Base_Type (Utyp)), Loc))),
+                Reason => CE_Tag_Check_Failed));
 
          --  If the result type is a specific nonlimited tagged type,
          --  then we have to ensure that the tag of the result is that
@@ -2716,13 +2761,6 @@ package body Exp_Ch5 is
         and then No_Initialization (Parent (Entity (Expression (L))))
       then
          null;
-
-      elsif Nkind (L) = N_Indexed_Component
-        and then Is_Entity_Name (Original_Node (Prefix (L)))
-        and then Is_Entry_Formal (Entity (Original_Node (Prefix (L))))
-      then
-         null;
-
       else
          Append_List_To (Res,
            Make_Final_Call (