* 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, 173 insertions, 28 deletions

diff --git a/gcc/ada/freeze.adb b/gcc/ada/freeze.adb
index 55a98104f57..7fe7f8affb3 100644
--- a/gcc/ada/freeze.adb
+++ b/gcc/ada/freeze.adb
@@ -8,7 +8,7 @@
 --                                                                          --
 --                            $Revision$
 --                                                                          --
---          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- --
@@ -36,6 +36,7 @@ with Exp_Ch11; use Exp_Ch11;
 with Exp_Pakd; use Exp_Pakd;
 with Exp_Util; use Exp_Util;
 with Layout;   use Layout;
+with Lib.Xref; use Lib.Xref;
 with Nlists;   use Nlists;
 with Nmake;    use Nmake;
 with Opt;      use Opt;
@@ -248,7 +249,18 @@ package body Freeze is
       end if;
 
       if Is_Entity_Name (Nam) then
-         Call_Name := New_Reference_To (Old_S, Loc);
+
+         --  If the renamed entity is a predefined operator, retain full
+         --  name to ensure its visibility.
+
+         if Ekind (Old_S) = E_Operator
+           and then Nkind (Nam) = N_Expanded_Name
+         then
+            Call_Name := New_Copy (Name (N));
+         else
+            Call_Name := New_Reference_To (Old_S, Loc);
+         end if;
+
       else
          Call_Name := New_Copy (Name (N));
 
@@ -291,6 +303,8 @@ package body Freeze is
       --  in the declaration. However, default values that are aggregates
       --  are rewritten when partially analyzed, so we recover the original
       --  aggregate to insure that subsequent conformity checking works.
+      --  Similarly, if the default expression was constant-folded, recover
+      --  the original expression.
 
       Formal := First_Formal (Defining_Entity (Decl));
 
@@ -308,7 +322,10 @@ package body Freeze is
                   Set_Entity (Parameter_Type (Param_Spec), Etype (O_Formal));
                end if;
 
-            elsif Nkind (Default_Value (O_Formal)) = N_Aggregate then
+            elsif Nkind (Default_Value (O_Formal)) = N_Aggregate
+              or else Nkind (Original_Node (Default_Value (O_Formal))) /=
+                                           Nkind (Default_Value (O_Formal))
+            then
                Set_Expression (Param_Spec,
                  New_Copy_Tree (Original_Node (Default_Value (O_Formal))));
             end if;
@@ -409,9 +426,7 @@ package body Freeze is
       --  to give a smaller size.
 
       function Size_Known (T : Entity_Id) return Boolean;
-      --  Recursive function that does all the work.
-      --  Is this right??? isn't recursive case already handled???
-      --  certainly yes for normal call, but what about bogus sem_res call???
+      --  Recursive function that does all the work
 
       function Static_Discriminated_Components (T : Entity_Id) return Boolean;
       --  If T is a constrained subtype, its size is not known if any of its
@@ -468,9 +483,6 @@ package body Freeze is
          if Size_Known_At_Compile_Time (T) then
             return True;
 
-         elsif Error_Posted (T) then
-            return False;
-
          elsif Is_Scalar_Type (T)
            or else Is_Task_Type (T)
          then
@@ -485,6 +497,12 @@ package body Freeze is
             elsif not Is_Constrained (T) then
                return False;
 
+            --  Don't do any recursion on type with error posted, since
+            --  we may have a malformed type that leads us into a loop
+
+            elsif Error_Posted (T) then
+               return False;
+
             elsif not Size_Known (Component_Type (T)) then
                return False;
             end if;
@@ -541,7 +559,14 @@ package body Freeze is
            and then not Is_Generic_Type (T)
            and then Present (Underlying_Type (T))
          then
-            return Size_Known (Underlying_Type (T));
+            --  Don't do any recursion on type with error posted, since
+            --  we may have a malformed type that leads us into a loop
+
+            if Error_Posted (T) then
+               return False;
+            else
+               return Size_Known (Underlying_Type (T));
+            end if;
 
          elsif Is_Record_Type (T) then
             if Is_Class_Wide_Type (T) then
@@ -551,6 +576,12 @@ package body Freeze is
                return Size_Known_At_Compile_Time (Base_Type (T))
                  and then Static_Discriminated_Components (T);
 
+            --  Don't do any recursion on type with error posted, since
+            --  we may have a malformed type that leads us into a loop
+
+            elsif Error_Posted (T) then
+               return False;
+
             else
                declare
                   Packed_Size_Known : Boolean := Is_Packed (T);
@@ -1218,6 +1249,17 @@ package body Freeze is
                   end if;
                end;
 
+            --  If this is a constrained subtype of an already frozen type,
+            --  make the subtype frozen as well. It might otherwise be frozen
+            --  in the wrong scope, and a freeze node on subtype has no effect.
+
+            elsif Is_Access_Type (Etype (Comp))
+              and then not Is_Frozen (Designated_Type (Etype (Comp)))
+              and then Is_Itype (Designated_Type (Etype (Comp)))
+              and then Is_Frozen (Base_Type (Designated_Type (Etype (Comp))))
+            then
+               Set_Is_Frozen (Designated_Type (Etype (Comp)));
+
             elsif Is_Array_Type (Etype (Comp))
               and then Is_Access_Type (Component_Type (Etype (Comp)))
               and then Present (Parent (Comp))
@@ -1250,9 +1292,11 @@ package body Freeze is
                   if Present (CC) then
                      Placed_Component := True;
 
-                     if not Size_Known_At_Compile_Time
+                     if Inside_A_Generic then
+                        null;
+
+                     elsif not Size_Known_At_Compile_Time
                               (Underlying_Type (Etype (Comp)))
-                       and then not Inside_A_Generic
                      then
                         Error_Msg_N
                           ("component clause not allowed for variable " &
@@ -1827,9 +1871,12 @@ package body Freeze is
                   Next_Index (Indx);
                end loop;
 
-               --  For base type, propagate flags for component type
+               --  Processing that is done only for base types
 
                if Ekind (E) = E_Array_Type then
+
+                  --  Propagate flags for component type
+
                   if Is_Controlled (Component_Type (E))
                     or else Has_Controlled_Component (Ctyp)
                   then
@@ -1839,18 +1886,16 @@ package body Freeze is
                   if Has_Unchecked_Union (Component_Type (E)) then
                      Set_Has_Unchecked_Union (E);
                   end if;
-               end if;
 
-               --  If packing was requested or if the component size was set
-               --  explicitly, then see if bit packing is required. This
-               --  processing is only done for base types, since all the
-               --  representation aspects involved are type-related. This
-               --  is not just an optimization, if we start processing the
-               --  subtypes, they intefere with the settings on the base
-               --  type (this is because Is_Packed has a slightly different
-               --  meaning before and after freezing).
+                  --  If packing was requested or if the component size was set
+                  --  explicitly, then see if bit packing is required. This
+                  --  processing is only done for base types, since all the
+                  --  representation aspects involved are type-related. This
+                  --  is not just an optimization, if we start processing the
+                  --  subtypes, they intefere with the settings on the base
+                  --  type (this is because Is_Packed has a slightly different
+                  --  meaning before and after freezing).
 
-               if E = Base_Type (E) then
                   declare
                      Csiz : Uint;
                      Esiz : Uint;
@@ -1939,6 +1984,63 @@ package body Freeze is
                         end if;
                      end if;
                   end;
+
+               --  Processing that is done only for subtypes
+
+               else
+                  --  Acquire alignment from base type
+
+                  if Unknown_Alignment (E) then
+                     Set_Alignment (E, Alignment (Base_Type (E)));
+                  end if;
+               end if;
+
+               --  Check one common case of a size given where the array
+               --  needs to be packed, but was not so the size cannot be
+               --  honored. This would of course be caught by the backend,
+               --  and indeed we don't catch all cases. The point is that
+               --  we can give a better error message in those cases that
+               --  we do catch with the circuitry here.
+
+               if Present (Size_Clause (E))
+                 and then Known_Static_Esize (E)
+                 and then not Has_Pragma_Pack (E)
+                 and then Number_Dimensions (E) = 1
+                 and then not Has_Component_Size_Clause (E)
+                 and then Known_Static_Component_Size (E)
+               then
+                  declare
+                     Lo, Hi : Node_Id;
+                     Ctyp   : constant Entity_Id := Component_Type (E);
+
+                  begin
+                     Get_Index_Bounds (First_Index (E), Lo, Hi);
+
+                     if Compile_Time_Known_Value (Lo)
+                       and then Compile_Time_Known_Value (Hi)
+                       and then Known_Static_RM_Size (Ctyp)
+                       and then RM_Size (Ctyp) < 64
+                     then
+                        declare
+                           Lov : constant Uint := Expr_Value (Lo);
+                           Hiv : constant Uint := Expr_Value (Hi);
+                           Len : constant Uint :=
+                                   UI_Max (Uint_0, Hiv - Lov + 1);
+
+                        begin
+                           if Esize (E) < Len * Component_Size (E)
+                             and then Esize (E) = Len * RM_Size (Ctyp)
+                           then
+                              Error_Msg_NE
+                                ("size given for& too small",
+                                   Size_Clause (E), E);
+                              Error_Msg_N
+                                ("\explicit pragma Pack is required",
+                                   Size_Clause (E));
+                           end if;
+                        end;
+                     end if;
+                  end;
                end if;
 
                --  If any of the index types was an enumeration type with
@@ -2241,10 +2343,10 @@ package body Freeze is
             elsif Has_Discriminants (E)
               and Is_Constrained (E)
             then
-
                declare
                   Constraint : Elmt_Id;
                   Expr       : Node_Id;
+
                begin
                   Constraint := First_Elmt (Discriminant_Constraint (E));
 
@@ -2285,9 +2387,10 @@ package body Freeze is
             then
                declare
                   Prim_List : constant Elist_Id := Primitive_Operations (E);
-                  Prim      : Elmt_Id           := First_Elmt (Prim_List);
+                  Prim      : Elmt_Id;
 
                begin
+                  Prim := First_Elmt (Prim_List);
                   while Present (Prim) loop
                      if Convention (Node (Prim)) = Convention_Ada then
                         Set_Convention (Node (Prim), Convention (E));
@@ -2299,6 +2402,43 @@ package body Freeze is
             end if;
          end if;
 
+         --  Generate primitive operation references for a tagged type
+
+         if Is_Tagged_Type (E)
+           and then not Is_Class_Wide_Type (E)
+         then
+            declare
+               Prim_List : constant Elist_Id := Primitive_Operations (E);
+               Prim      : Elmt_Id;
+               Ent       : Entity_Id;
+
+            begin
+               Prim := First_Elmt (Prim_List);
+               while Present (Prim) loop
+                  Ent := Node (Prim);
+
+                  --  If the operation is derived, get the original for
+                  --  cross-reference purposes (it is the original for
+                  --  which we want the xref, and for which the comes
+                  --  from source test needs to be performed).
+
+                  while Present (Alias (Ent)) loop
+                     Ent := Alias (Ent);
+                  end loop;
+
+                  Generate_Reference (E, Ent, 'p', Set_Ref => False);
+                  Next_Elmt (Prim);
+               end loop;
+
+            --  If we get an exception, then something peculiar has happened
+            --  probably as a result of a previous error. Since this is only
+            --  for non-critical cross-references, ignore the error.
+
+            exception
+               when others => null;
+            end;
+         end if;
+
          --  Now that all types from which E may depend are frozen, see
          --  if the size is known at compile time, if it must be unsigned,
          --  or if strict alignent is required
@@ -2316,9 +2456,14 @@ package body Freeze is
          if Has_Size_Clause (E)
            and then not Size_Known_At_Compile_Time (E)
          then
-            Error_Msg_N
-              ("size clause not allowed for variable length type",
-               Size_Clause (E));
+            --  Supress this message if errors posted on E, even if we are
+            --  in all errors mode, since this is often a junk message
+
+            if not Error_Posted (E) then
+               Error_Msg_N
+                 ("size clause not allowed for variable length type",
+                  Size_Clause (E));
+            end if;
          end if;
 
          --  Remaining process is to set/verify the representation information,