decl.c (Gigi_Equivalent_Type): New case.

	* gcc-interface/decl.c (Gigi_Equivalent_Type) <E_Array_Subtype>: New
	case.  Return the base type if the subtype is not constrained.

From-SVN: r276865

gcc/ada/ChangeLog

 2019-10-11  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interface/decl.c (Gigi_Equivalent_Type) <E_Array_Subtype>: New
+	case.  Return the base type if the subtype is not constrained.
+
+2019-10-11  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Named_{Integer|Real}>:
 	New case to deal with the definition of named numbers.
 	<E_Variable>: Minor tweaks.  Set DECL_IGNORED_P on the CONST_DECL

gcc/ada/gcc-interface/decl.c

@@ -5026,6 +5026,11 @@ Gigi_Equivalent_Type (Entity_Id gnat_entity)
       gnat_equiv = Etype (gnat_entity);
       break;
 
+    case E_Array_Subtype:
+      if (!Is_Constrained (gnat_entity))
+	gnat_equiv = Etype (gnat_entity);
+      break;
+
     case E_Class_Wide_Type:
       gnat_equiv = Root_Type (gnat_entity);
       break;

gcc/testsuite/ChangeLog

+2019-10-11  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/array38.adb: New test.
+	* gnat.dg/array38_pkg.ad[sb]: New helper.
+
 2019-10-11  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/91987

gcc/testsuite/gnat.dg/array38.adb

+-- { dg-do compile }
+
+with Array38_Pkg; use Array38_Pkg;
+
+procedure Array38 is
+
+  function My_F is new F (Index, Byte, Bytes, Integer);
+
+begin
+  null;
+end;

gcc/testsuite/gnat.dg/array38_pkg.adb

+package body Array38_Pkg is
+
+   function F (Data : Array_Type) return Value_Type is
+   begin
+      return Value_Type'First;
+   end;
+
+end Array38_Pkg;

gcc/testsuite/gnat.dg/array38_pkg.ads

+package Array38_Pkg is
+
+   type Byte is mod 2**8;
+
+   type Length is new Natural;
+   subtype Index is Length range 1 .. Length'Last;
+
+   type Bytes is array (Index range <>) of Byte with
+     Predicate => Bytes'Length > 0;
+
+   generic
+      type Index_Type   is (<>);
+      type Element_Type is (<>);
+      type Array_Type   is array (Index_Type range <>) of Element_Type;
+      type Value_Type   is (<>);
+   function F (Data : Array_Type) return Value_Type;
+
+end Array38_Pkg;