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-rw-r--r--kvx/SelectOpproof.v1
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diff --git a/kvx/SelectOpproof.v b/kvx/SelectOpproof.v
index 8c834de5..7a301929 100644
--- a/kvx/SelectOpproof.v
+++ b/kvx/SelectOpproof.v
@@ -1199,7 +1199,6 @@ Qed.
Theorem eval_cast8unsigned: unary_constructor_sound cast8unsigned (Val.zero_ext 8).
Proof.
red; intros until x. unfold cast8unsigned.
-
rewrite Val.zero_ext_and. apply eval_andimm. compute; auto. discriminate.
Qed.