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diff --git a/gcc/ada/sem_ch6.ads b/gcc/ada/sem_ch6.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              S E M _ C H 6                               --
+--                                                                          --
+--                                 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 Types; use Types;
+package Sem_Ch6 is
+
+   type Conformance_Type is
+     (Type_Conformant, Mode_Conformant, Subtype_Conformant, Fully_Conformant);
+   pragma Ordered (Conformance_Type);
+   --  Conformance type used in conformance checks between specs and bodies,
+   --  and for overriding. The literals match the RM definitions of the
+   --  corresponding terms. This is an ordered type, since each conformance
+   --  type is stronger than the ones preceding it.
+
+   procedure Analyze_Abstract_Subprogram_Declaration (N : Node_Id);
+   procedure Analyze_Extended_Return_Statement       (N : Node_Id);
+   procedure Analyze_Function_Call                   (N : Node_Id);
+   procedure Analyze_Operator_Symbol                 (N : Node_Id);
+   procedure Analyze_Parameter_Association           (N : Node_Id);
+   procedure Analyze_Parameterized_Expression        (N : Node_Id);
+   procedure Analyze_Procedure_Call                  (N : Node_Id);
+   procedure Analyze_Simple_Return_Statement         (N : Node_Id);
+   procedure Analyze_Subprogram_Declaration          (N : Node_Id);
+   procedure Analyze_Subprogram_Body                 (N : Node_Id);
+
+   function Analyze_Subprogram_Specification (N : Node_Id) return Entity_Id;
+   --  Analyze subprogram specification in both subprogram declarations
+   --  and body declarations. Returns the defining entity for the
+   --  specification N.
+
+   procedure Cannot_Inline (Msg : String; N : Node_Id; Subp : Entity_Id);
+   --  This procedure is called if the node N, an instance of a call to
+   --  subprogram Subp, cannot be inlined. Msg is the message to be issued,
+   --  and has a ? as the last character. If Subp has a pragma Always_Inlined,
+   --  then an error message is issued (by removing the last character of Msg).
+   --  If Subp is not Always_Inlined, then a warning is issued if the flag
+   --  Ineffective_Inline_Warnings is set, and if not, the call has no effect.
+
+   procedure Check_Conventions (Typ : Entity_Id);
+   --  Ada 2005 (AI-430): Check that the conventions of all inherited and
+   --  overridden dispatching operations of type Typ are consistent with their
+   --  respective counterparts.
+
+   procedure Check_Delayed_Subprogram (Designator : Entity_Id);
+   --  Designator can be a E_Subprogram_Type, E_Procedure or E_Function. If a
+   --  type in its profile depends on a private type without a full
+   --  declaration, indicate that the subprogram or type is delayed.
+
+   procedure Check_Discriminant_Conformance
+     (N        : Node_Id;
+      Prev     : Entity_Id;
+      Prev_Loc : Node_Id);
+   --  Check that the discriminants of a full type N fully conform to the
+   --  discriminants of the corresponding partial view Prev. Prev_Loc indicates
+   --  the source location of the partial view, which may be different than
+   --  Prev in the case of private types.
+
+   procedure Check_Fully_Conformant
+     (New_Id  : Entity_Id;
+      Old_Id  : Entity_Id;
+      Err_Loc : Node_Id := Empty);
+   --  Check that two callable entities (subprograms, entries, literals)
+   --  are fully conformant, post error message if not (RM 6.3.1(17)) with
+   --  the flag being placed on the Err_Loc node if it is specified, and
+   --  on the appropriate component of the New_Id construct if not. Note:
+   --  when checking spec/body conformance, New_Id must be the body entity
+   --  and Old_Id is the spec entity (the code in the implementation relies
+   --  on this ordering, and in any case, this makes sense, since if flags
+   --  are to be placed on the construct, they clearly belong on the body.
+
+   procedure Check_Mode_Conformant
+     (New_Id   : Entity_Id;
+      Old_Id   : Entity_Id;
+      Err_Loc  : Node_Id := Empty;
+      Get_Inst : Boolean := False);
+   --  Check that two callable entities (subprograms, entries, literals)
+   --  are mode conformant, post error message if not (RM 6.3.1(15)) with
+   --  the flag being placed on the Err_Loc node if it is specified, and
+   --  on the appropriate component of the New_Id construct if not. The
+   --  argument Get_Inst is set to True when this is a check against a
+   --  formal access-to-subprogram type, indicating that mapping of types
+   --  is needed.
+
+   procedure Check_Overriding_Indicator
+     (Subp            : Entity_Id;
+      Overridden_Subp : Entity_Id;
+      Is_Primitive    : Boolean);
+   --  Verify the consistency of an overriding_indicator given for subprogram
+   --  declaration, body, renaming, or instantiation.  Overridden_Subp is set
+   --  if the scope where we are introducing the subprogram contains a
+   --  type-conformant subprogram that becomes hidden by the new subprogram.
+   --  Is_Primitive indicates whether the subprogram is primitive.
+
+   procedure Check_Subtype_Conformant
+     (New_Id                   : Entity_Id;
+      Old_Id                   : Entity_Id;
+      Err_Loc                  : Node_Id := Empty;
+      Skip_Controlling_Formals : Boolean := False);
+   --  Check that two callable entities (subprograms, entries, literals)
+   --  are subtype conformant, post error message if not (RM 6.3.1(16)),
+   --  the flag being placed on the Err_Loc node if it is specified, and
+   --  on the appropriate component of the New_Id construct if not.
+   --  Skip_Controlling_Formals is True when checking the conformance of
+   --  a subprogram that implements an interface operation. In that case,
+   --  only the non-controlling formals can (and must) be examined.
+
+   procedure Check_Type_Conformant
+     (New_Id  : Entity_Id;
+      Old_Id  : Entity_Id;
+      Err_Loc : Node_Id := Empty);
+   --  Check that two callable entities (subprograms, entries, literals)
+   --  are type conformant, post error message if not (RM 6.3.1(14)) with
+   --  the flag being placed on the Err_Loc node if it is specified, and
+   --  on the appropriate component of the New_Id construct if not.
+
+   function Conforming_Types
+     (T1       : Entity_Id;
+      T2       : Entity_Id;
+      Ctype    : Conformance_Type;
+      Get_Inst : Boolean := False) return Boolean;
+   --  Check that the types of two formal parameters are conforming. In most
+   --  cases this is just a name comparison, but within an instance it involves
+   --  generic actual types, and in the presence of anonymous access types it
+   --  must examine the designated types.
+
+   procedure Create_Extra_Formals (E : Entity_Id);
+   --  For each parameter of a subprogram or entry that requires an additional
+   --  formal (such as for access parameters and indefinite discriminated
+   --  parameters), creates the appropriate formal and attach it to its
+   --  associated parameter. Each extra formal will also be appended to
+   --  the end of Subp's parameter list (with each subsequent extra formal
+   --  being attached to the preceding extra formal).
+
+   function Find_Corresponding_Spec
+     (N          : Node_Id;
+      Post_Error : Boolean := True) return Entity_Id;
+   --  Use the subprogram specification in the body to retrieve the previous
+   --  subprogram declaration, if any.
+
+   function Fully_Conformant (New_Id, Old_Id : Entity_Id) return Boolean;
+   --  Determine whether two callable entities (subprograms, entries,
+   --  literals) are fully conformant (RM 6.3.1(17))
+
+   function Fully_Conformant_Expressions
+     (Given_E1 : Node_Id;
+      Given_E2 : Node_Id) return Boolean;
+   --  Determines if two (non-empty) expressions are fully conformant
+   --  as defined by (RM 6.3.1(18-21))
+
+   function Fully_Conformant_Discrete_Subtypes
+      (Given_S1 : Node_Id;
+       Given_S2 : Node_Id) return Boolean;
+   --  Determines if two subtype definitions are fully conformant. Used
+   --  for entry family conformance checks (RM 6.3.1 (24)).
+
+   procedure Install_Formals (Id : Entity_Id);
+   --  On entry to a subprogram body, make the formals visible. Note that
+   --  simply placing the subprogram on the scope stack is not sufficient:
+   --  the formals must become the current entities for their names. This
+   --  procedure is also used to get visibility to the formals when analyzing
+   --  preconditions and postconditions appearing in the spec.
+
+   function Is_Interface_Conformant
+     (Tagged_Type : Entity_Id;
+      Iface_Prim  : Entity_Id;
+      Prim        : Entity_Id) return Boolean;
+   --  Returns true if both primitives have a matching name (including support
+   --  for names of inherited private primitives --which have suffix 'P'), they
+   --  are type conformant, and Prim is defined in the scope of Tagged_Type.
+   --  Special management is done for functions returning interfaces.
+
+   procedure List_Inherited_Pre_Post_Aspects (E : Entity_Id);
+   --  E is the entity for a subprogram or generic subprogram spec. This call
+   --  lists all inherited Pre/Post aspects if List_Inherited_Pre_Post is True.
+
+   function Mode_Conformant (New_Id, Old_Id : Entity_Id) return Boolean;
+   --  Determine whether two callable entities (subprograms, entries,
+   --  literals) are mode conformant (RM 6.3.1(15))
+
+   procedure New_Overloaded_Entity
+     (S            : Entity_Id;
+      Derived_Type : Entity_Id := Empty);
+   --  Process new overloaded entity. Overloaded entities are created by
+   --  enumeration type declarations, subprogram specifications, entry
+   --  declarations, and (implicitly) by type derivations. Derived_Type non-
+   --  Empty indicates that this is subprogram derived for that type.
+
+   procedure Process_Formals (T : List_Id; Related_Nod : Node_Id);
+   --  Enter the formals in the scope of the subprogram or entry, and
+   --  analyze default expressions if any. The implicit types created for
+   --  access parameter are attached to the Related_Nod which comes from the
+   --  context.
+
+   procedure Reference_Body_Formals (Spec : Entity_Id; Bod : Entity_Id);
+   --  If there is a separate spec for a subprogram or generic subprogram, the
+   --  formals of the body are treated as references to the corresponding
+   --  formals of the spec. This reference does not count as an actual use of
+   --  the formal, in order to diagnose formals that are unused in the body.
+   --  This procedure is also used in renaming_as_body declarations, where
+   --  the formals of the specification must be treated as body formals that
+   --  correspond to the previous subprogram declaration, and not as new
+   --  entities with their defining entry in the cross-reference information.
+
+   procedure Set_Actual_Subtypes (N : Node_Id; Subp : Entity_Id);
+   --  If the formals of a subprogram are unconstrained, build a subtype
+   --  declaration that uses the bounds or discriminants of the actual to
+   --  construct an actual subtype for them. This is an optimization that
+   --  is done only in some cases where the actual subtype cannot change
+   --  during execution of the subprogram. By setting the actual subtype
+   --  once, we avoid recomputing it unnecessarily.
+
+   procedure Set_Formal_Mode (Formal_Id : Entity_Id);
+   --  Set proper Ekind to reflect formal mode (in, out, in out)
+
+   function Subtype_Conformant
+     (New_Id                   : Entity_Id;
+      Old_Id                   : Entity_Id;
+      Skip_Controlling_Formals : Boolean := False) return Boolean;
+   --  Determine whether two callable entities (subprograms, entries, literals)
+   --  are subtype conformant (RM6.3.1(16)).  Skip_Controlling_Formals is True
+   --  when checking the conformance of a subprogram that implements an
+   --  interface operation. In that case, only the non-controlling formals
+   --  can (and must) be examined.
+
+   function Type_Conformant
+     (New_Id                   : Entity_Id;
+      Old_Id                   : Entity_Id;
+      Skip_Controlling_Formals : Boolean := False) return Boolean;
+   --  Determine whether two callable entities (subprograms, entries, literals)
+   --  are type conformant (RM6.3.1(14)). Skip_Controlling_Formals is True when
+   --  checking the conformance of a subprogram that implements an interface
+   --  operation. In that case, only the non-controlling formals can (and must)
+   --  be examined.
+
+   procedure Valid_Operator_Definition (Designator : Entity_Id);
+   --  Verify that an operator definition has the proper number of formals
+
+end Sem_Ch6;