[multiple changes]

2017-01-12  Hristian Kirtchev  <kirtchev@adacore.com>

	* sinfo.ads: Minor reformatting.

2017-01-12  Gary Dismukes  <dismukes@adacore.com>

	* exp_util.adb, exp_util.ads, einfo.ads: Minor typo fixes and
	reformatting.

2017-01-12  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_ch6.adb (Make_Build_In_Place_Call_In_Anonymous_Context): Add new
	variable Definite. Create a local object and pass its 'Access to the
	BIP function when the result type is either definite or it does not
	require any finalization or secondary stack management.

From-SVN: r244353

gcc/ada/ChangeLog

+2017-01-12  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* sinfo.ads: Minor reformatting.
+
+2017-01-12  Gary Dismukes  <dismukes@adacore.com>
+
+	* exp_util.adb, exp_util.ads, einfo.ads: Minor typo fixes and
+	reformatting.
+
+2017-01-12  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* exp_ch6.adb (Make_Build_In_Place_Call_In_Anonymous_Context): Add new
+	variable Definite. Create a local object and pass its 'Access to the
+	BIP function when the result type is either definite or it does not
+	require any finalization or secondary stack management.
+
 2017-01-12  Bob Duff  <duff@adacore.com>
 
 	* contracts.adb, einfo.adb, errout.adb, exp_attr.adb,

gcc/ada/einfo.ads

@@ -927,7 +927,7 @@ package Einfo is
 --       when the type is subject to pragma Default_Initial_Condition (DIC), or
 --       when the type inherits a DIC pragma from a parent type. Points to the
 --       entity of a procedure which takes a single argument of the given type
---       and verifies the assertion expression of the DIC pragma at runtime.
+--       and verifies the assertion expression of the DIC pragma at run time.
 
 --       Note: the reason this is marked as a synthesized attribute is that the
 --       way this is stored is as an element of the Subprograms_For_Type field.
@@ -1760,7 +1760,7 @@ package Einfo is
 --       Defined in functions and generic functions. Set if there is one or
 --       more missing return statements in the function. This is used to
 --       control wrapping of the body in Exp_Ch6 to ensure that the program
---       error exception is correctly raised in this case at runtime.
+--       error exception is correctly raised in this case at run time.
 
 --    Has_Nested_Block_With_Handler (Flag101)
 --       Defined in scope entities. Set if there is a nested block within the
@@ -2370,7 +2370,7 @@ package Einfo is
 --       Defined in record types and subtypes. Set if the type was created
 --       by the expander to represent a task or protected type. For every
 --       concurrent type, such as record type is constructed, and task and
---       protected objects are instances of this record type at runtime
+--       protected objects are instances of this record type at run time
 --       (The backend will replace declarations of the concurrent type using
 --       the declarations of the corresponding record type). See Exp_Ch9 for
 --       further details.
@@ -2432,7 +2432,7 @@ package Einfo is
 --    Is_DIC_Procedure (Flag132)
 --       Defined in functions and procedures. Set for a generated procedure
 --       which verifies the assumption of pragma Default_Initial_Condition at
---       runtime.
+--       run time.
 
 --    Is_Discrete_Or_Fixed_Point_Type (synthesized)
 --       Applies to all entities, true for all discrete types and subtypes
@@ -3956,7 +3956,7 @@ package Einfo is
 --       the expanded N_Procedure_Call_Statement node for this call. It
 --       is used for Import/Export_Exception processing to modify the
 --       register call to make appropriate entries in the special tables
---       used for handling these pragmas at runtime.
+--       used for handling these pragmas at run time.
 
 --    Related_Array_Object (Node25)
 --       Defined in array types and subtypes. Used only for the base type

gcc/ada/exp_ch6.adb

@@ -7529,6 +7529,14 @@ package body Exp_Ch6 is
       Return_Obj_Id   : Entity_Id;
       Return_Obj_Decl : Entity_Id;
 
+      Definite : Boolean;
+      --  True if result subtype is definite, or has a size that does not
+      --  require secondary stack usage (i.e. no variant part or components
+      --  whose type depends on discriminants). In particular, untagged types
+      --  with only access discriminants do not require secondary stack use.
+      --  Note that if the return type is tagged we must always use the sec.
+      --  stack because the call may dispatch on result.
+
    begin
       --  Step past qualification, type conversion (which can occur in actual
       --  parameter contexts), and unchecked conversion (which can occur in
@@ -7568,6 +7576,10 @@ package body Exp_Ch6 is
       end if;
 
       Result_Subt := Etype (Function_Id);
+      Definite :=
+        (Is_Definite_Subtype (Underlying_Type (Result_Subt))
+             and then not Is_Tagged_Type (Result_Subt))
+          or else not Requires_Transient_Scope (Underlying_Type (Result_Subt));
 
       --  If the build-in-place function returns a controlled object, then the
       --  object needs to be finalized immediately after the context. Since
@@ -7606,10 +7618,10 @@ package body Exp_Ch6 is
             Analyze (Function_Call);
          end;
 
-      --  When the result subtype is constrained, an object of the subtype is
+      --  When the result subtype is definite, an object of the subtype is
       --  declared and an access value designating it is passed as an actual.
 
-      elsif Is_Constrained (Underlying_Type (Result_Subt)) then
+      elsif Definite then
 
          --  Create a temporary object to hold the function result
 

gcc/ada/exp_util.adb

@@ -1102,7 +1102,7 @@ package body Exp_Util is
 
                --  In SPARK mode, reject an inherited condition for an
                --  inherited operation if it contains a call to an overriding
-               --  operation, because this implies that the pre/postcondition
+               --  operation, because this implies that the pre/postconditions
                --  of the inherited operation have changed silently.
 
                elsif SPARK_Mode = On
@@ -1206,7 +1206,7 @@ package body Exp_Util is
          Deriv_Typ : Entity_Id;
          Stmts     : in out List_Id);
       --  Add a runtime check to verify the assertion expression of inherited
-      --  pragma DIC_Prag. Par_Typ is parent type which is also the owner of
+      --  pragma DIC_Prag. Par_Typ is parent type, which is also the owner of
       --  the DIC pragma. Deriv_Typ is the derived type inheriting the DIC
       --  pragma. All generated code is added to list Stmts.
 
@@ -1454,7 +1454,7 @@ package body Exp_Util is
       begin
          Expr := New_Copy_Tree (DIC_Expr);
 
-         --  Perform the following substituion:
+         --  Perform the following substitution:
 
          --    * Replace the current instance of DIC_Typ with a reference to
          --    the _object formal parameter of the DIC procedure.
@@ -2056,7 +2056,7 @@ package body Exp_Util is
       pragma Assert (Present (Typ_Decl));
 
       --  Create the formal parameter which emulates the variable-like behavior
-      --  of the current type instance.
+      --  of the type's current instance.
 
       Obj_Id := Make_Defining_Identifier (Loc, Chars => Name_uObject);
 
@@ -2083,7 +2083,7 @@ package body Exp_Util is
                     New_Occurrence_Of (Work_Typ, Loc)))));
 
       --  The declaration should not be inserted into the tree when the context
-      --  is ASIS, GNATprove or a generic unit because it is not part of the
+      --  is ASIS, GNATprove, or a generic unit because it is not part of the
       --  template.
 
       if ASIS_Mode or GNATprove_Mode or Inside_A_Generic then

gcc/ada/exp_util.ads

@@ -254,11 +254,11 @@ package Exp_Util is
       Adjust_Sloc : Boolean);
    --  Build the expression for an inherited class-wide condition. Prag is
    --  the pragma constructed from the corresponding aspect of the parent
-   --  subprogram, and Subp is the overriding operation and Par_Subp is
+   --  subprogram, and Subp is the overriding operation, and Par_Subp is
    --  the overridden operation that has the condition. Adjust_Sloc is True
    --  when the sloc of nodes traversed should be adjusted for the inherited
    --  pragma. The routine is also called to check whether an inherited
-   --  operation that is not overridden but has inherited conditions need
+   --  operation that is not overridden but has inherited conditions needs
    --  a wrapper, because the inherited condition includes calls to other
    --  primitives that have been overridden. In that case the first argument
    --  is the expression of the original class-wide aspect. In SPARK_Mode, such
@@ -274,11 +274,11 @@ package Exp_Util is
 
    procedure Build_DIC_Procedure_Body (Typ : Entity_Id);
    --  Create the body of the procedure which verifies the assertion expression
-   --  of pragma Default_Initial_Condition at runtime.
+   --  of pragma Default_Initial_Condition at run time.
 
    procedure Build_DIC_Procedure_Declaration (Typ : Entity_Id);
    --  Create the declaration of the procedure which verifies the assertion
-   --  expression of pragma Default_Initial_Condition at runtime.
+   --  expression of pragma Default_Initial_Condition at run time.
 
    procedure Build_Procedure_Form (N : Node_Id);
    --  Create a procedure declaration which emulates the behavior of a function

gcc/ada/sinfo.ads

@@ -11019,10 +11019,6 @@ package Sinfo is
    -- Utility Functions --
    -----------------------
 
-   function Pragma_Name_Unmapped (N : Node_Id) return Name_Id;
-   --  Function to obtain Chars field of Pragma_Identifier. In most cases, you
-   --  want to call Pragma_Name instead.
-
    procedure Map_Pragma_Name (From, To : Name_Id);
    --  Used in the implementation of pragma Rename_Pragma. Maps pragma name
    --  From to pragma name To, so From can be used as a synonym for To.
@@ -11033,9 +11029,14 @@ package Sinfo is
    --  once or twice.
 
    function Pragma_Name (N : Node_Id) return Name_Id;
-   --  Same as Pragma_Name_Unmapped, except that if From has been mapped to To,
-   --  and Pragma_Name_Unmapped (N) = From, then this returns To. In other
-   --  words, this takes into account pragmas Rename_Pragma.
+   --  Obtain the name of pragma N from the Chars field of its identifier. If
+   --  the pragma has been renamed using Rename_Pragma, this routine returns
+   --  the name of the renaming.
+
+   function Pragma_Name_Unmapped (N : Node_Id) return Name_Id;
+   --  Obtain the name of pragma N from the Chars field of its identifier. This
+   --  form of name extraction does not take into account renamings performed
+   --  by Rename_Pragma.
 
    -----------------------------
    -- Syntactic Parent Tables --