[Ada] Fix signature mismatch for Defining_Entity

[Ada] Fix signature mismatch for Defining_Entity

[Pierre-Marie de Rodat]

[-- Attachment #1: Type: text/plain, Size: 486 bytes --]

This fixes the signature mismatch recently introduced for Defining_Entity
between the front-end proper and gigi.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

	* sem_util.ads (Defining_Entity): Remove Empty_On_Errors parameter.
	(Defining_Entity_Or_Empty): New function.
	* sem_util.adb (Defining_Entity): Move bulk of implementation to...
	(Defining_Entity_Or_Empty): ...here.  Do not raise Program_Error.
	(Innermost_Master_Scope_Depth): Call Defining_Entity_Or_Empty.

[-- Attachment #2: patch.diff --]
[-- Type: text/x-diff, Size: 5034 bytes --]

diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -269,14 +269,12 @@ package body Sem_Util is
       --  Construct an integer literal representing an accessibility level
       --  with its type set to Natural.
 
-      function Innermost_Master_Scope_Depth
-        (N : Node_Id) return Uint;
+      function Innermost_Master_Scope_Depth (N : Node_Id) return Uint;
       --  Returns the scope depth of the given node's innermost
       --  enclosing dynamic scope (effectively the accessibility
       --  level of the innermost enclosing master).
 
-      function Function_Call_Or_Allocator_Level
-        (N : Node_Id) return Node_Id;
+      function Function_Call_Or_Allocator_Level (N : Node_Id) return Node_Id;
       --  Centralized processing of subprogram calls which may appear in
       --  prefix notation.
 
@@ -284,10 +282,9 @@ package body Sem_Util is
       -- Innermost_Master_Scope_Depth --
       ----------------------------------
 
-      function Innermost_Master_Scope_Depth
-        (N : Node_Id) return Uint
-      is
+      function Innermost_Master_Scope_Depth (N : Node_Id) return Uint is
          Encl_Scop           : Entity_Id;
+         Ent                 : Entity_Id;
          Node_Par            : Node_Id := Parent (N);
          Master_Lvl_Modifier : Int     := 0;
 
@@ -301,12 +298,10 @@ package body Sem_Util is
          --  among other things. These cases are detected properly ???
 
          while Present (Node_Par) loop
+            Ent := Defining_Entity_Or_Empty (Node_Par);
 
-            if Present (Defining_Entity
-                         (Node_Par, Empty_On_Errors => True))
-            then
-               Encl_Scop := Nearest_Dynamic_Scope
-                              (Defining_Entity (Node_Par));
+            if Present (Ent) then
+               Encl_Scop := Nearest_Dynamic_Scope (Ent);
 
                --  Ignore transient scopes made during expansion
 
@@ -7076,10 +7071,23 @@ package body Sem_Util is
    -- Defining_Entity --
    ---------------------
 
-   function Defining_Entity
-     (N               : Node_Id;
-      Empty_On_Errors : Boolean := False) return Entity_Id
-   is
+   function Defining_Entity (N : Node_Id) return Entity_Id is
+      Ent : constant Entity_Id := Defining_Entity_Or_Empty (N);
+
+   begin
+      if Present (Ent) then
+         return Ent;
+
+      else
+         raise Program_Error;
+      end if;
+   end Defining_Entity;
+
+   ------------------------------
+   -- Defining_Entity_Or_Empty --
+   ------------------------------
+
+   function Defining_Entity_Or_Empty (N : Node_Id) return Entity_Id is
    begin
       case Nkind (N) is
          when N_Abstract_Subprogram_Declaration
@@ -7178,13 +7186,9 @@ package body Sem_Util is
             return Entity (Identifier (N));
 
          when others =>
-            if Empty_On_Errors then
-               return Empty;
-            end if;
-
-            raise Program_Error;
+            return Empty;
       end case;
-   end Defining_Entity;
+   end Defining_Entity_Or_Empty;
 
    --------------------------
    -- Denotes_Discriminant --


diff --git a/gcc/ada/sem_util.ads b/gcc/ada/sem_util.ads
--- a/gcc/ada/sem_util.ads
+++ b/gcc/ada/sem_util.ads
@@ -662,9 +662,7 @@ package Sem_Util is
    --  in the case of a descendant of a generic formal type (returns Int'Last
    --  instead of 0).
 
-   function Defining_Entity
-     (N               : Node_Id;
-      Empty_On_Errors : Boolean := False) return Entity_Id;
+   function Defining_Entity (N : Node_Id) return Entity_Id;
    --  Given a declaration N, returns the associated defining entity. If the
    --  declaration has a specification, the entity is obtained from the
    --  specification. If the declaration has a defining unit name, then the
@@ -675,19 +673,13 @@ package Sem_Util is
    --  local entities declared during loop expansion. These entities need
    --  debugging information, generated through Qualify_Entity_Names, and
    --  the loop declaration must be placed in the table Name_Qualify_Units.
-   --
-   --  Set flag Empty_On_Errors to change the behavior of this routine as
-   --  follows:
-   --
-   --    * True  - A declaration that lacks a defining entity returns Empty.
-   --      A node that does not allow for a defining entity returns Empty.
-   --
-   --    * False - A declaration that lacks a defining entity is given a new
-   --      internally generated entity which is subsequently returned. A node
-   --      that does not allow for a defining entity raises Program_Error
 
    --  WARNING: There is a matching C declaration of this subprogram in fe.h
 
+   function Defining_Entity_Or_Empty (N : Node_Id) return Entity_Id;
+   --  This is equivalent to Defining_Entity but it returns Empty for nodes
+   --  without an entity instead of raising Program_Error.
+
    function Denotes_Discriminant
      (N                : Node_Id;
       Check_Concurrent : Boolean := False) return Boolean;