Ltac dsepcon :=
match goal with
[ H : sepcon _ _ _ |- _ ] =>
let s1 := fresh "s" in
let s2 := fresh "s" in
let JOIN := fresh "JOIN" in
let H1 := fresh "H" in
let H2 := fresh "H" in
destruct H as [s1 [s2 [JOIN [H1 H2]]]]
end.

Lemma nil_or_loc_full v : nil_or_loc v -> full v.
Hint Resolve nil_or_loc_full.