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-- { dg-do run }
-- { dg-options "-gnatws" }
with Text_IO;
procedure renaming2 is
type RealNodeData;
type RefRealNodeData is access RealNodeData;
type ExpressionEntry;
type RefExpression is access ExpressionEntry;
type RefDefUseEntry is access Natural;
type ExpressionEntry is
record
Number : RefDefUseEntry;
Id : Integer;
end record;
type RealNodeData is
record
Node : RefExpression;
Id : Integer;
end record;
for ExpressionEntry use
record
Number at 0 range 0 .. 63;
Id at 8 range 0 .. 31;
end record ;
for RealNodeData use
record
Node at 0 range 0 .. 63;
Id at 8 range 0 .. 31;
end record ;
U_Node : RefDefUseEntry := new Natural'(1);
E_Node : RefExpression := new ExpressionEntry'(Number => U_Node,
Id => 2);
R_Node : RefRealNodeData := new RealNodeData'(Node => E_Node,
Id => 3);
procedure test_routine (NodeRealData : RefRealNodeData)
is
OldHead : RefDefUseEntry renames NodeRealData.all.Node.all.Number;
OldHead1 : constant RefDefUseEntry := OldHead;
begin
NodeRealData.all.Node := new ExpressionEntry'(Number => null, Id => 4);
declare
OldHead2 : constant RefDefUseEntry := OldHead;
begin
if OldHead1 /= OldHead2
then
Text_IO.Put_Line (" OldHead changed !!!");
end if;
end;
end;
begin
test_routine (R_Node);
end;
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