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diff --git a/src/SpecificGen/GF5211_32Reflective/Reified/PreFreeze.v b/src/SpecificGen/GF5211_32Reflective/Reified/PreFreeze.v
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+Require Import Crypto.SpecificGen.GF5211_32Reflective.CommonUnOp.
+
+Definition rprefreezeZ_sig : rexpr_unop_sig prefreeze. Proof. cbv [prefreeze GF5211_32.prefreeze]. reify_sig. Defined.
+Definition rprefreezeW := Eval vm_compute in rword_of_Z rprefreezeZ_sig.
+Lemma rprefreezeW_correct_and_bounded_gen : correct_and_bounded_genT rprefreezeW rprefreezeZ_sig.
+Proof. rexpr_correct. Qed.
+Definition rprefreeze_output_bounds := Eval vm_compute in compute_bounds rprefreezeW ExprUnOp_bounds.
+Local Obligation Tactic := intros; vm_compute; constructor.
+Program Definition rprefreezeW_correct_and_bounded
+ := ExprUnOp_correct_and_bounded
+ rprefreezeW prefreeze rprefreezeZ_sig rprefreezeW_correct_and_bounded_gen
+ _ _.
+
+Local Open Scope string_scope.
+Compute ("PreFreeze", compute_bounds_for_display rprefreezeW ExprUnOp_bounds).
+Compute ("PreFreeze overflows? ", sanity_compute rprefreezeW ExprUnOp_bounds).
+Compute ("PreFreeze overflows (error if it does)? ", sanity_check rprefreezeW ExprUnOp_bounds).