[multiple changes]

2014-07-30  Robert Dewar  <dewar@adacore.com>

	* sem_res.adb, sem_ch6.adb: Minor code reorganization.
	* inline.adb: Minor reformatting.

2014-07-30  Javier Miranda  <miranda@adacore.com>

	* a-tags.ads: Add comments.

From-SVN: r213272

gcc/ada/ChangeLog

+2014-07-30  Robert Dewar  <dewar@adacore.com>
+
+	* sem_res.adb, sem_ch6.adb: Minor code reorganization.
+	* inline.adb: Minor reformatting.
+
+2014-07-30  Javier Miranda  <miranda@adacore.com>
+
+	* a-tags.ads: Add comments.
+
 2014-07-30  Pat Rogers  <rogers@adacore.com>
 
 	* gnat_rm.texi: Minor word error.

gcc/ada/a-tags.ads

@@ -33,11 +33,12 @@
 --                                                                          --
 ------------------------------------------------------------------------------
 
---  The operations in this package provide the guarantee that all dispatching
---  calls on primitive operations of tagged types and interfaces take constant
---  time (in terms of source lines executed), that is to say, the cost of these
---  calls is independent of the number of primitives of the type or interface,
---  and independent of the number of ancestors or interface progenitors that a
+--  For performance analysis, take into account that the operations in this
+--  package provide the guarantee that all dispatching calls on primitive
+--  operations of tagged types and interfaces take constant time (in terms
+--  of source lines executed), that is to say, the cost of these calls is
+--  independent of the number of primitives of the type or interface, and
+--  independent of the number of ancestors or interface progenitors that a
 --  tagged type may have.
 
 --  The following subprograms of the public part of this package take constant
@@ -51,9 +52,17 @@
 --  The following subprograms of the public part of this package take non
 --  constant time (in terms of sources line executed):
 
---    Descendant_Tag (when used with a locally defined tagged type)
---    Internal_Tag (when used with a locally defined tagged type)
---    Interface_Ancestor_Tags
+--    Internal_Tag (when used with a locally defined tagged type), because in
+--    such case this routine processes the external tag, extract from it an
+--    address available there, and convert it into the tag value returned by
+--    this function. The number of instructions executed is not constant since
+--    it depends on the length of the external tag string.
+
+--    Descendant_Tag (when used with a locally defined tagged type), because
+--    it relies on the subprogram Internal_Tag() to provide its functionality.
+
+--    Interface_Ancestor_Tags, because this function returns a table whose
+--    length depends on the number of interfaces covered by a tagged type.
 
 with System.Storage_Elements;
 

gcc/ada/inline.adb

@@ -1697,9 +1697,9 @@ package body Inline is
       --  is analyzed, as this is where a pragma SPARK_Mode might be inserted.
 
       elsif Present (Spec_Id)
-        and then (No (SPARK_Pragma (Spec_Id))
-                    or else
-                  Get_SPARK_Mode_From_Pragma (SPARK_Pragma (Spec_Id)) /= On)
+        and then
+          (No (SPARK_Pragma (Spec_Id))
+            or else Get_SPARK_Mode_From_Pragma (SPARK_Pragma (Spec_Id)) /= On)
       then
          return False;
 
@@ -1709,8 +1709,7 @@ package body Inline is
       elsif Instantiation_Location (Sloc (Id)) /= No_Location then
          return False;
 
-      --  Predicate functions are treated specially by GNATprove. Do not inline
-      --  them.
+      --  Don't inline predicate functions (treated specially by GNATprove)
 
       elsif Is_Predicate_Function (Id) then
          return False;

gcc/ada/sem_ch6.adb

@@ -3070,12 +3070,13 @@ package body Sem_Ch6 is
                   declare
                      Body_Spec : constant Node_Id :=
                                    Copy_Separate_Tree (Specification (N));
-                     New_Decl : constant Node_Id :=
-                                  Make_Subprogram_Declaration (Loc,
-                                    Copy_Separate_Tree (Specification (N)));
+                     New_Decl  : constant Node_Id :=
+                                   Make_Subprogram_Declaration (Loc,
+                                     Copy_Separate_Tree (Specification (N)));
+
                      SPARK_Mode_Aspect : Node_Id;
-                     Aspects : List_Id;
-                     Prag, Aspect : Node_Id;
+                     Aspects           : List_Id;
+                     Prag, Aspect      : Node_Id;
 
                   begin
                      Insert_Before (N, New_Decl);
@@ -3093,8 +3094,7 @@ package body Sem_Ch6 is
                      Analyze (New_Decl);
 
                      --  The analysis of the generated subprogram declaration
-                     --  may have introduced pragmas, which need to be
-                     --  analyzed.
+                     --  may have introduced pragmas that need to be analyzed.
 
                      Prag := Next (New_Decl);
                      while Prag /= N loop
@@ -3113,8 +3113,7 @@ package body Sem_Ch6 is
                         SPARK_Mode_Aspect :=
                           New_Copy (Find_Aspect (Spec_Id, Aspect_SPARK_Mode));
                         Set_Analyzed (SPARK_Mode_Aspect, False);
-                        Aspects := New_List;
-                        Append (SPARK_Mode_Aspect, Aspects);
+                        Aspects := New_List (SPARK_Mode_Aspect);
                         Set_Aspect_Specifications (N, Aspects);
                      end if;
 

gcc/ada/sem_res.adb

@@ -6216,15 +6216,16 @@ package body Sem_Res is
          --  being inlined.
 
          declare
-            Nam_Alias : constant Entity_Id := Ultimate_Alias (Nam);
-            Decl : constant Node_Id := Unit_Declaration_Node (Nam_Alias);
+            Nam_UA : constant Entity_Id := Ultimate_Alias (Nam);
+            Decl   : constant Node_Id   := Unit_Declaration_Node (Nam_UA);
+
          begin
             --  If the subprogram is not eligible for inlining in GNATprove
             --  mode, do nothing.
 
-            if not Can_Be_Inlined_In_GNATprove_Mode (Nam_Alias, Empty)
-              or else Nkind (Decl) /= N_Subprogram_Declaration
-              or else not Is_Inlined_Always (Nam_Alias)
+            if Nkind (Decl) /= N_Subprogram_Declaration
+              or else not Is_Inlined_Always (Nam_UA)
+              or else not Can_Be_Inlined_In_GNATprove_Mode (Nam_UA, Empty)
             then
                null;
 
@@ -6234,7 +6235,7 @@ package body Sem_Res is
             elsif In_Assertion_Expr /= 0 then
                Error_Msg_NE ("?cannot inline call to &", N, Nam);
                Error_Msg_N ("\call appears in assertion expression", N);
-               Set_Is_Inlined_Always (Nam_Alias, False);
+               Set_Is_Inlined_Always (Nam_UA, False);
 
             --  Inlining should not be performed during pre-analysis
 
@@ -6246,7 +6247,7 @@ package body Sem_Res is
                if No (Corresponding_Body (Decl)) then
                   Error_Msg_NE
                     ("?cannot inline call to & (body not seen yet)", N, Nam);
-                  Set_Is_Inlined_Always (Nam_Alias, False);
+                  Set_Is_Inlined_Always (Nam_UA, False);
 
                --  Nothing to do if there is no body to inline, indicating that
                --  the subprogram is not suitable for inlining in GNATprove
@@ -6263,12 +6264,12 @@ package body Sem_Res is
                   Error_Msg_NE ("?cannot inline call to &", N, Nam);
                   Error_Msg_N
                     ("\call appears in potentially unevaluated context", N);
-                  Set_Is_Inlined_Always (Nam_Alias, False);
+                  Set_Is_Inlined_Always (Nam_UA, False);
 
                --  Otherwise, inline the call
 
                else
-                  Expand_Inlined_Call (N, Nam_Alias, Nam);
+                  Expand_Inlined_Call (N, Nam_UA, Nam);
                end if;
             end if;
          end;