obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 239 insertions, 0 deletions

diff --git a/gcc/ada/sem_ch13.ads b/gcc/ada/sem_ch13.ads
new file mode 100644
index 000000000..95263ec84
--- /dev/null
+++ b/gcc/ada/sem_ch13.ads
@@ -0,0 +1,239 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             S E M _ C H 1 3                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2010, 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- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Table;
+with Types; use Types;
+with Uintp; use Uintp;
+
+package Sem_Ch13 is
+   procedure Analyze_At_Clause                          (N : Node_Id);
+   procedure Analyze_Attribute_Definition_Clause        (N : Node_Id);
+   procedure Analyze_Enumeration_Representation_Clause  (N : Node_Id);
+   procedure Analyze_Free_Statement                     (N : Node_Id);
+   procedure Analyze_Freeze_Entity                      (N : Node_Id);
+   procedure Analyze_Record_Representation_Clause       (N : Node_Id);
+   procedure Analyze_Code_Statement                     (N : Node_Id);
+
+   procedure Analyze_Aspect_Specifications
+     (N : Node_Id;
+      E : Entity_Id;
+      L : List_Id);
+   --  This procedure is called to analyze aspect specifications for node N. E
+   --  is the corresponding entity declared by the declaration node N, and L is
+   --  the list of aspect specifications for this node. If L is No_List, the
+   --  call is ignored. Note that we can't use a simpler interface of just
+   --  passing the node N, since the analysis of the node may cause it to be
+   --  rewritten to a node not permitting aspect specifications.
+
+   procedure Adjust_Record_For_Reverse_Bit_Order (R : Entity_Id);
+   --  Called from Freeze where R is a record entity for which reverse bit
+   --  order is specified and there is at least one component clause. Adjusts
+   --  component positions according to either Ada 95 or Ada 2005 (AI-133).
+
+   procedure Build_Invariant_Procedure (Typ : Entity_Id; N : Node_Id);
+   --  Typ is a private type with invariants (indicated by Has_Invariants being
+   --  set for Typ, indicating the presence of pragma Invariant entries on the
+   --  rep chain, note that Invariant aspects have already been converted to
+   --  pragma Invariant), then this procedure builds the spec and body for the
+   --  corresponding Invariant procedure, inserting them at appropriate points
+   --  in the package specification N. Invariant_Procedure is set for Typ. Note
+   --  that this procedure is called at the end of processing the declarations
+   --  in the visible part (i.e. the right point for visibility analysis of
+   --  the invariant expression).
+
+   procedure Check_Record_Representation_Clause (N : Node_Id);
+   --  This procedure completes the analysis of a record representation clause
+   --  N. It is called at freeze time after adjustment of component clause bit
+   --  positions for possible non-standard bit order. In the case of Ada 2005
+   --  (machine scalar) mode, this adjustment can make substantial changes, so
+   --  some checks, in particular for component overlaps cannot be done at the
+   --  time the record representation clause is first seen, but must be delayed
+   --  till freeze time, and in particular is called after calling the above
+   --  procedure for adjusting record bit positions for reverse bit order.
+
+   procedure Initialize;
+   --  Initialize internal tables for new compilation
+
+   procedure Set_Enum_Esize (T : Entity_Id);
+   --  This routine sets the Esize field for an enumeration type T, based
+   --  on the current representation information available for T. Note that
+   --  the setting of the RM_Size field is not affected. This routine also
+   --  initializes the alignment field to zero.
+
+   function Minimum_Size
+     (T      : Entity_Id;
+      Biased : Boolean := False) return Nat;
+   --  Given an elementary type, determines the minimum number of bits required
+   --  to represent all values of the type. This function may not be called
+   --  with any other types. If the flag Biased is set True, then the minimum
+   --  size calculation that biased representation is used in the case of a
+   --  discrete type, e.g. the range 7..8 gives a minimum size of 4 with
+   --  Biased set to False, and 1 with Biased set to True. Note that the
+   --  biased parameter only has an effect if the type is not biased, it
+   --  causes Minimum_Size to indicate the minimum size of an object with
+   --  the given type, of the size the type would have if it were biased. If
+   --  the type is already biased, then Minimum_Size returns the biased size,
+   --  regardless of the setting of Biased. Also, fixed-point types are never
+   --  biased in the current implementation. If the size is not known at
+   --  compile time, this function returns 0.
+
+   procedure Check_Constant_Address_Clause (Expr : Node_Id; U_Ent : Entity_Id);
+   --  Expr is an expression for an address clause. This procedure checks
+   --  that the expression is constant, in the limited sense that it is safe
+   --  to evaluate it at the point the object U_Ent is declared, rather than
+   --  at the point of the address clause. The condition for this to be true
+   --  is that the expression has no variables, no constants declared after
+   --  U_Ent, and no calls to non-pure functions. If this condition is not
+   --  met, then an appropriate error message is posted. This check is applied
+   --  at the point an object with an address clause is frozen, as well as for
+   --  address clauses for tasks and entries.
+
+   procedure Check_Size
+     (N      : Node_Id;
+      T      : Entity_Id;
+      Siz    : Uint;
+      Biased : out Boolean);
+   --  Called when size Siz is specified for subtype T. This subprogram checks
+   --  that the size is appropriate, posting errors on node N as required.
+   --  This check is effective for elementary types and bit-packed arrays.
+   --  For other non-elementary types, a check is only made if an explicit
+   --  size has been given for the type (and the specified size must match).
+   --  The parameter Biased is set False if the size specified did not require
+   --  the use of biased representation, and True if biased representation
+   --  was required to meet the size requirement. Note that Biased is only
+   --  set if the type is not currently biased, but biasing it is the only
+   --  way to meet the requirement. If the type is currently biased, then
+   --  this biased size is used in the initial check, and Biased is False.
+   --  If the size is too small, and an error message is given, then both
+   --  Esize and RM_Size are reset to the allowed minimum value in T.
+
+   function Rep_Item_Too_Early (T : Entity_Id; N : Node_Id) return Boolean;
+   --  Called at the start of processing a representation clause or a
+   --  representation pragma. Used to check that the representation item
+   --  is not being applied to an incomplete type or to a generic formal
+   --  type or a type derived from a generic formal type. Returns False if
+   --  no such error occurs. If this error does occur, appropriate error
+   --  messages are posted on node N, and True is returned.
+
+   function Rep_Item_Too_Late
+     (T     : Entity_Id;
+      N     : Node_Id;
+      FOnly : Boolean := False) return Boolean;
+   --  Called at the start of processing a representation clause or a
+   --  representation pragma. Used to check that a representation item
+   --  for entity T does not appear too late (according to the rules in
+   --  RM 13.1(9) and RM 13.1(10)). N is the associated node, which in
+   --  the pragma case is the pragma or representation clause itself, used
+   --  for placing error messages if the item is too late.
+   --
+   --  Fonly is a flag that causes only the freezing rule (para 9) to be
+   --  applied, and the tests of para 10 are skipped. This is appropriate
+   --  for both subtype related attributes (Alignment and Size) and for
+   --  stream attributes, which, although certainly not subtype related
+   --  attributes, clearly should not be subject to the para 10 restrictions
+   --  (see AI95-00137). Similarly, we also skip the para 10 restrictions for
+   --  the Storage_Size case where they also clearly do not apply, and for
+   --  Stream_Convert which is in the same category as the stream attributes.
+   --
+   --  If the rep item is too late, an appropriate message is output and
+   --  True is returned, which is a signal that the caller should abandon
+   --  processing for the item. If the item is not too late, then False
+   --  is returned, and the caller can continue processing the item.
+   --
+   --  If no error is detected, this call also as a side effect links the
+   --  representation item onto the head of the representation item chain
+   --  (referenced by the First_Rep_Item field of the entity).
+   --
+   --  Note: Rep_Item_Too_Late must be called with the underlying type in
+   --  the case of a private or incomplete type. The protocol is to first
+   --  check for Rep_Item_Too_Early using the initial entity, then take the
+   --  underlying type, then call Rep_Item_Too_Late on the result.
+   --
+   --  Note: Calls to Rep_Item_Too_Late are ignored for the case of attribute
+   --  definition clauses which have From_Aspect_Specification set. This is
+   --  because such clauses are linked on to the Rep_Item chain in procedure
+   --  Sem_Ch13.Analyze_Aspect_Specifications. See that procedure for details.
+
+   function Same_Representation (Typ1, Typ2 : Entity_Id) return Boolean;
+   --  Given two types, where the two types are related by possible derivation,
+   --  determines if the two types have the same representation, or different
+   --  representations, requiring the special processing for representation
+   --  change. A False result is possible only for array, enumeration or
+   --  record types.
+
+   procedure Validate_Unchecked_Conversion
+     (N        : Node_Id;
+      Act_Unit : Entity_Id);
+   --  Validate a call to unchecked conversion. N is the node for the actual
+   --  instantiation, which is used only for error messages. Act_Unit is the
+   --  entity for the instantiation, from which the actual types etc. for this
+   --  instantiation can be determined. This procedure makes an entry in a
+   --  table and/or generates an N_Validate_Unchecked_Conversion node. The
+   --  actual checking is done in Validate_Unchecked_Conversions or in the
+   --  back end as required.
+
+   procedure Validate_Unchecked_Conversions;
+   --  This routine is called after calling the backend to validate unchecked
+   --  conversions for size and alignment appropriateness. The reason it is
+   --  called that late is to take advantage of any back-annotation of size
+   --  and alignment performed by the backend.
+
+   procedure Validate_Address_Clauses;
+   --  This is called after the back end has been called (and thus after the
+   --  alignments of objects have been back annotated). It goes through the
+   --  table of saved address clauses checking for suspicious alignments and
+   --  if necessary issuing warnings.
+
+   procedure Validate_Independence;
+   --  This is called after the back end has been called (and thus after the
+   --  layout of components has been back annotated). It goes through the
+   --  table of saved pragma Independent[_Component] entries, checking that
+   --  independence can be achieved, and if necessary issuing error messages.
+
+   -------------------------------------
+   -- Table for Validate_Independence --
+   -------------------------------------
+
+   --  If a legal pragma Independent or Independent_Components is given for
+   --  an entity, then an entry is made in this table, to be checked by a
+   --  call to Validate_Independence after back annotation of layout is done.
+
+   type Independence_Check_Record is record
+      N : Node_Id;
+      --  The pragma Independent or Independent_Components
+
+      E : Entity_Id;
+      --  The entity to which it applies
+   end record;
+
+   package Independence_Checks is new Table.Table (
+     Table_Component_Type => Independence_Check_Record,
+     Table_Index_Type     => Int,
+     Table_Low_Bound      => 1,
+     Table_Initial        => 20,
+     Table_Increment      => 200,
+     Table_Name           => "Independence_Checks");
+
+end Sem_Ch13;