-- { dg-do compile { target i?86-*-* x86_64-*-* } } -- { dg-options "-O3 -msse2 -fdump-tree-vect-details" } package body Vect16 is procedure Add_Sub (X, Y : Sarray; R,S : out Sarray) is begin R(1) := X(5) + Y(5); S(1) := X(5) - Y(5); for I in 1 .. 4 loop R(I + 1) := X(I) + Y(I); S(I + 1) := X(I) - Y(I); end loop; end; end Vect16; -- { dg-final { scan-tree-dump-not "possible aliasing" "vect" } }