* tree.c (max_int_size_in_bytes): New function, inspired from

        code in function.c:assign_temp.
        * tree.h (max_int_size_in_bytes): Declare.
        * function.c (assign_temp): Use it.
        * gimplify.c (create_tmp_var): Relax the assertions on the type
        properties, not mandating constant size any more.
        (force_constant_size): New static function.
        (gimple_add_tmp_var): Use it, forcing variable size to a
        constant upper bound if it is not constant on entry.

        * ada/misc.c (gnat_type_max_size): Look at TYPE_ADA_SIZE if we have
        not been able to get a constant upper bound from TYPE_SIZE_UNIT.

	* gnat.dg/varsize_temp.adb: New test.
	


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114938 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 29 insertions, 0 deletions

diff --git a/gcc/testsuite/gnat.dg/varsize_temp.adb b/gcc/testsuite/gnat.dg/varsize_temp.adb
new file mode 100644
index 00000000000..b7c3a0b6039
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/varsize_temp.adb
@@ -0,0 +1,29 @@
+-- { dg-do compile }
+
+procedure Varsize_Temp (Nbytes : Natural) is
+
+   type Message_T (Length : Natural) is record
+      case Length is
+         when 0 => null;
+         when others => Id : Natural;
+      end case;
+   end record;
+
+   type Local_Message_T is new Message_T (Nbytes);
+
+   function One_message return Local_Message_T is
+      M : Local_Message_T;
+   begin
+      if M.Length > 0 then
+         M.Id := 1;
+      end if;
+      return M;
+   end;
+
+   procedure Process (X : Local_Message_T) is begin null; end;
+
+begin
+   Process (One_Message);
+end;
+
+