[Ada] New flag Transform_Function_Array

gcc/ada/

	* exp_ch6.adb, freeze.adb, gnat1drv.adb, opt.ads, sem_ch6.adb
	(Transform_Function_Array): New flag, split from Modify_Tree_For_C.
	* exp_unst.adb: Minor reformatting.

diff --git a/gcc/ada/exp_ch6.adb b/gcc/ada/exp_ch6.adb
index b762026..4f13576 100644 (file)
--- a/gcc/ada/exp_ch6.adb
+++ b/gcc/ada/exp_ch6.adb
@@ -3665,7 +3665,7 @@ package body Exp_Ch6 is
          return;
       end if;
 
-      if Modify_Tree_For_C
+      if Transform_Function_Array
         and then Nkind (Call_Node) = N_Function_Call
         and then Is_Entity_Name (Name (Call_Node))
       then
@@ -6691,7 +6691,7 @@ package body Exp_Ch6 is
       --  are not needed by the C generator (and this also produces cleaner
       --  output).
 
-      if Modify_Tree_For_C
+      if Transform_Function_Array
         and then Nkind (Specification (N)) = N_Function_Specification
         and then Is_Array_Type (Etype (Subp))
         and then Is_Constrained (Etype (Subp))

diff --git a/gcc/ada/exp_unst.adb b/gcc/ada/exp_unst.adb
index ffc30c3..e0f2bd1 100644 (file)
--- a/gcc/ada/exp_unst.adb
+++ b/gcc/ada/exp_unst.adb
@@ -882,8 +882,8 @@ package body Exp_Unst is
                      --  outside the nested structure do not affect us.
 
                      if Scope_Within (Ent, Subp)
-                        and then Is_Subprogram (Ent)
-                        and then not Is_Imported (Ent)
+                       and then Is_Subprogram (Ent)
+                       and then not Is_Imported (Ent)
                      then
                         Append_Unique_Call ((N, Current_Subprogram, Ent));
                      end if;

diff --git a/gcc/ada/freeze.adb b/gcc/ada/freeze.adb
index 05a43c7..0779165 100644 (file)
--- a/gcc/ada/freeze.adb
+++ b/gcc/ada/freeze.adb
@@ -9142,7 +9142,7 @@ package body Freeze is
          Check_Overriding_Indicator (E, Empty, Is_Primitive (E));
       end if;
 
-      if Modify_Tree_For_C
+      if Transform_Function_Array
         and then Nkind (Parent (E)) = N_Function_Specification
         and then Is_Array_Type (Etype (E))
         and then Is_Constrained (Etype (E))

diff --git a/gcc/ada/gnat1drv.adb b/gcc/ada/gnat1drv.adb
index 180a140..1ea7d76 100644 (file)
--- a/gcc/ada/gnat1drv.adb
+++ b/gcc/ada/gnat1drv.adb
@@ -167,6 +167,7 @@ procedure Gnat1drv is
 
       if Debug_Flag_Dot_U then
          Modify_Tree_For_C := True;
+         Transform_Function_Array := True;
       end if;
 
       --  -gnatd_A disables generation of ALI files
@@ -179,6 +180,7 @@ procedure Gnat1drv is
 
       if Generate_C_Code then
          Modify_Tree_For_C := True;
+         Transform_Function_Array := True;
          Unnest_Subprogram_Mode := True;
          Building_Static_Dispatch_Tables := False;
          Minimize_Expression_With_Actions := True;
@@ -246,9 +248,10 @@ procedure Gnat1drv is
          --  this way when we are doing CodePeer tests on existing test suites
          --  that may have -gnateg set, to avoid the need for special casing.
 
-         Modify_Tree_For_C      := False;
-         Generate_C_Code        := False;
-         Unnest_Subprogram_Mode := False;
+         Modify_Tree_For_C        := False;
+         Transform_Function_Array := False;
+         Generate_C_Code          := False;
+         Unnest_Subprogram_Mode   := False;
 
          --  Turn off inlining, confuses CodePeer output and gains nothing
 
@@ -454,9 +457,10 @@ procedure Gnat1drv is
          --  this way when we are doing GNATprove tests on existing test suites
          --  that may have -gnateg set, to avoid the need for special casing.
 
-         Modify_Tree_For_C := False;
-         Generate_C_Code := False;
-         Unnest_Subprogram_Mode := False;
+         Modify_Tree_For_C        := False;
+         Transform_Function_Array := False;
+         Generate_C_Code          := False;
+         Unnest_Subprogram_Mode   := False;
 
          --  Turn off inlining, which would confuse formal verification output
          --  and gain nothing.

diff --git a/gcc/ada/opt.ads b/gcc/ada/opt.ads
index 7ec44dc..3e9f36e 100644 (file)
--- a/gcc/ada/opt.ads
+++ b/gcc/ada/opt.ads
@@ -1588,6 +1588,12 @@ package Opt is
    --  Tolerate time stamp and other consistency errors. If this flag is set to
    --  True (-t), then inconsistencies result in warnings rather than errors.
 
+   Transform_Function_Array : Boolean := False;
+   --  GNAT
+   --  If this switch is set True, then functions returning constrained arrays
+   --  are transformed into a procedure with an out parameter, and all calls
+   --  are updated accordingly.
+
    Treat_Categorization_Errors_As_Warnings : Boolean := False;
    --  Normally categorization errors are true illegalities. If this switch
    --  is set, then such errors result in warning messages rather than error

diff --git a/gcc/ada/sem_ch6.adb b/gcc/ada/sem_ch6.adb
index 88bbdf7..c476e45 100644 (file)
--- a/gcc/ada/sem_ch6.adb
+++ b/gcc/ada/sem_ch6.adb
@@ -3023,10 +3023,10 @@ package body Sem_Ch6 is
          --  Required to ensure that Expand_Call rewrites calls to this
          --  function by calls to the built procedure.
 
-         if Modify_Tree_For_C
+         if Transform_Function_Array
            and then Nkind (Body_Spec) = N_Function_Specification
            and then
-              Rewritten_For_C (Defining_Entity (Specification (Subp_Decl)))
+             Rewritten_For_C (Defining_Entity (Specification (Subp_Decl)))
          then
             Set_Rewritten_For_C (Defining_Entity (Body_Spec));
             Set_Corresponding_Procedure (Defining_Entity (Body_Spec),
@@ -4073,11 +4073,11 @@ package body Sem_Ch6 is
                   Build_Subprogram_Declaration;
 
                --  If this is a function that returns a constrained array, and
-               --  we are generating C code, create subprogram declaration
-               --  to simplify subsequent C generation.
+               --  Transform_Function_Array is set, create subprogram
+               --  declaration to simplify e.g. subsequent C generation.
 
                elsif No (Spec_Id)
-                 and then Modify_Tree_For_C
+                 and then Transform_Function_Array
                  and then Nkind (Body_Spec) = N_Function_Specification
                  and then Is_Array_Type (Etype (Body_Id))
                  and then Is_Constrained (Etype (Body_Id))
@@ -4171,17 +4171,18 @@ package body Sem_Ch6 is
          Spec_Id := Build_Internal_Protected_Declaration (N);
       end if;
 
-      --  If we are generating C and this is a function returning a constrained
-      --  array type for which we must create a procedure with an extra out
-      --  parameter, build and analyze the body now. The procedure declaration
-      --  has already been created. We reuse the source body of the function,
-      --  because in an instance it may contain global references that cannot
-      --  be reanalyzed. The source function itself is not used any further,
-      --  so we mark it as having a completion. If the subprogram is a stub the
-      --  transformation is done later, when the proper body is analyzed.
+      --  If Transform_Function_Array is set and this is a function returning a
+      --  constrained array type for which we must create a procedure with an
+      --  extra out parameter, build and analyze the body now. The procedure
+      --  declaration has already been created. We reuse the source body of the
+      --  function, because in an instance it may contain global references
+      --  that cannot be reanalyzed. The source function itself is not used any
+      --  further, so we mark it as having a completion. If the subprogram is a
+      --  stub the transformation is done later, when the proper body is
+      --  analyzed.
 
       if Expander_Active
-        and then Modify_Tree_For_C
+        and then Transform_Function_Array
         and then Present (Spec_Id)
         and then Ekind (Spec_Id) = E_Function
         and then Nkind (N) /= N_Subprogram_Body_Stub