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+-- { dg-do compile }
+
+package Size_Clause2 is
+
+ -- The alignment of the record is capped to the greatest power of 2
+ -- factor of the size, so that the real size is 40 too and the size
+ -- of a component of type R1 in a packed record can be 40.
+ type R1 is record
+ I : Integer;
+ B : aliased Boolean;
+ end record;
+ for R1'Size use 40;
+
+ type S1 is record
+ rr : R1; -- size must be 40
+ end record;
+ pragma Pack(S1);
+
+ -- The record is explicitly given alignment 1 so its real type is 40 too.
+ -- The size of a component of type R2 in a packed record is naturally 40.
+ type R2 is record
+ I : Integer;
+ B : aliased Boolean;
+ end record;
+ for R2'Size use 40;
+ for R2'Alignment use 1;
+
+ type S2 is record
+ rr : R2; -- size must be 40
+ end record;
+ pragma Pack(S2);
+
+ -- The record is explicitly given alignment 4 so its real type is 64.
+ -- That's not OK, because the size of a component of type R3 in a packed
+ -- record cannot be 40 so the size clause is violated.
+ type R3 is record
+ I : Integer;
+ B : aliased Boolean;
+ end record;
+ for R3'Size use 40; -- { dg-error "size for .R3. too small" }
+ for R3'Alignment use 4;
+
+ type S3 is record
+ rr : R3; -- size must be 40
+ end record;
+ pragma Pack(S3);
+
+end Size_Clause2;