(*The blocks explicitly exported via call arguments, plus the already shared blocks*)
Definition exportedSrc mu vals b := orb (getBlocks vals b) (sharedSrc mu b).
Definition exportedTgt mu vals b := orb (getBlocks vals b) (sharedTgt mu b).

Lemma val_list_inject_sub_on j k: forall vals1 vals2
(V:  Val.inject_list j vals1 vals2)
(HK: forall b, getBlocks vals1 b = true -> j b = k b),
Val.inject_list k vals1 vals2.