[multiple changes]

2014-07-31  Robert Dewar  <dewar@adacore.com>

	* exp_strm.adb: Minor reformatting.

2014-07-31  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch12.adb (Build_Wrapper): New procedure, subsidiary to
	Analyze_Associations, to create a wrapper around operators that
	are actuals to formal subprograms. This is done in GNATProve
	mode in order to propagate the contracts of the operators to
	the body of the instance.

From-SVN: r213363

3 files changed, 154 insertions, 2 deletions

diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index 41f233c..0b297d5 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,15 @@
+2014-07-31  Robert Dewar  <dewar@adacore.com>
+
+	* exp_strm.adb: Minor reformatting.
+
+2014-07-31  Ed Schonberg  <schonberg@adacore.com>
+
+	* sem_ch12.adb (Build_Wrapper): New procedure, subsidiary to
+	Analyze_Associations, to create a wrapper around operators that
+	are actuals to formal subprograms. This is done in GNATProve
+	mode in order to propagate the contracts of the operators to
+	the body of the instance.
+
 2014-07-31  Ed Schonberg  <schonberg@adacore.com>
 
 	* sem_attr.adb (Analyze_Attribute, case 'Old):  The reference is
diff --git a/gcc/ada/exp_strm.adb b/gcc/ada/exp_strm.adb
index 2c0f97b..dfb5f0d 100644
--- a/gcc/ada/exp_strm.adb
+++ b/gcc/ada/exp_strm.adb
@@ -155,7 +155,6 @@ package body Exp_Strm is
       Decls := New_List;
       Ranges := New_List;
       Indx  := First_Index (Typ);
-
       for J in 1 .. Dim loop
          Lnam := New_External_Name ('L', J);
          Hnam := New_External_Name ('H', J);
@@ -435,7 +434,6 @@ package body Exp_Strm is
       Pnam : out Entity_Id)
    is
       Loc : constant Source_Ptr := Sloc (Nod);
-
    begin
       Pnam :=
         Make_Defining_Identifier (Loc,
@@ -636,6 +634,7 @@ package body Exp_Strm is
                  Relocate_Node (Strm))));
 
          Set_Do_Range_Check (Res);
+
          if Base_Type (P_Type) /= Base_Type (U_Type) then
             Res := Unchecked_Convert_To (Base_Type (P_Type), Res);
          end if;
diff --git a/gcc/ada/sem_ch12.adb b/gcc/ada/sem_ch12.adb
index ccdd2b7..2cae224 100644
--- a/gcc/ada/sem_ch12.adb
+++ b/gcc/ada/sem_ch12.adb
@@ -954,6 +954,11 @@ package body Sem_Ch12 is
       --  In Ada 2005, indicates partial parameterization of a formal
       --  package. As usual an other association must be last in the list.
 
+      function Build_Wrapper (Formal : Entity_Id) return Node_Id;
+      --  In GNATProve mode, create a wrapper function for actuals that are
+      --  operators, in order to propagate their contract to the renaming
+      --  declarations generated for them.
+
       procedure Check_Overloaded_Formal_Subprogram (Formal : Entity_Id);
       --  Apply RM 12.3 (9): if a formal subprogram is overloaded, the instance
       --  cannot have a named association for it. AI05-0025 extends this rule
@@ -1001,6 +1006,126 @@ package body Sem_Ch12 is
       --  anonymous types, the presence a formal equality will introduce an
       --  implicit declaration for the corresponding inequality.
 
+      -------------------
+      -- Build_Wrapper --
+      -------------------
+
+      function Build_Wrapper (Formal : Entity_Id) return Node_Id is
+         Loc     : constant Source_Ptr := Sloc (I_Node);
+         Op_Name : constant Name_Id := Chars (Formal);
+         Typ     : constant Entity_Id := Etype (Formal);
+
+         Decl   : Node_Id;
+         Expr   : Node_Id;
+         F1, F2 : Entity_Id;
+         Func   : Entity_Id;
+         Spec   : Node_Id;
+
+         L, R   : Node_Id;
+
+      begin
+         --  Create entities for wrapper function and its formals
+
+         F1 := Make_Temporary (Loc, 'A');
+         F2 := Make_Temporary (Loc, 'B');
+         L  := New_Occurrence_Of (F1, Loc);
+         R  := New_Occurrence_Of (F2, Loc);
+
+         Func := Make_Temporary (Loc, 'F');
+
+         Spec := Make_Function_Specification (Loc,
+               Defining_Unit_Name => Func,
+
+            Parameter_Specifications => New_List (
+              Make_Parameter_Specification (Loc,
+                Defining_Identifier => F1,
+                Parameter_Type => Make_Identifier (Loc, Chars (Typ))),
+              Make_Parameter_Specification (Loc,
+                Defining_Identifier => F2,
+                Parameter_Type => Make_Identifier (Loc, Chars (Typ)))),
+
+            Result_Definition => Make_Identifier (Loc, Chars (Typ)));
+
+         --  Build expression as an operator node that corresponds to the
+         --  name of the actual, starting with binary operators.
+
+         if Op_Name = Name_Op_And then
+            Expr := Make_Op_And (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Or then
+            Expr := Make_Op_Or (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Xor then
+            Expr := Make_Op_Xor (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Eq then
+            Expr := Make_Op_Eq (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Ne then
+            Expr := Make_Op_Ne (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Le then
+            Expr := Make_Op_Le (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Gt then
+            Expr := Make_Op_Gt (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Ge then
+            Expr := Make_Op_Ge (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Lt then
+            Expr := Make_Op_Lt (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Add then
+            Expr := Make_Op_Add (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Subtract then
+            Expr := Make_Op_Subtract (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Concat then
+            Expr := Make_Op_Concat (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Multiply then
+            Expr := Make_Op_Multiply (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Divide then
+            Expr := Make_Op_Divide (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Mod then
+            Expr := Make_Op_Mod (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Rem then
+            Expr := Make_Op_Rem (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Expon then
+            Expr := Make_Op_Expon (Loc, Left_Opnd => L, Right_Opnd => R);
+
+         --  Unary operators.
+
+         elsif Op_Name = Name_Op_Add
+           and then No (Next_Formal (First_Formal (Actual)))
+         then
+            Expr := Make_Op_Plus (Loc, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Subtract
+           and then No (Next_Formal (First_Formal (Actual)))
+         then
+            Expr := Make_Op_Minus (Loc, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Abs then
+            Expr := Make_Op_Abs (Loc, Right_Opnd => R);
+
+         elsif Op_Name = Name_Op_Not then
+            Expr := Make_Op_Not (Loc, Right_Opnd => R);
+         end if;
+
+         Decl := Make_Expression_Function (Loc,
+                    Specification => Spec,
+                    Expression => Expr);
+
+         return Decl;
+      end Build_Wrapper;
+
       ----------------------------------------
       -- Check_Overloaded_Formal_Subprogram --
       ----------------------------------------
@@ -1521,6 +1646,22 @@ package body Sem_Ch12 is
                        Instantiate_Formal_Subprogram
                          (Formal, Match, Analyzed_Formal));
 
+                     if GNATprove_Mode then
+                        if Nkind (Match) = N_Operator_Symbol then
+                           Append_To (Assoc,
+                             Build_Wrapper
+                               (Defining_Entity (Analyzed_Formal)));
+
+                        elsif Box_Present (Formal)
+                           and then Nkind (Defining_Entity (Analyzed_Formal))
+                             = N_Defining_Operator_Symbol
+                        then
+                           Append_To (Assoc,
+                             Build_Wrapper
+                               (Defining_Entity (Analyzed_Formal)));
+                        end if;
+                     end if;
+
                      --  An instantiation is a freeze point for the actuals,
                      --  unless this is a rewritten formal package.