-tagOf_PrimOp MakeForeignObjOp = ILIT(200)
-tagOf_PrimOp WriteForeignObjOp = ILIT(201)
-tagOf_PrimOp MkWeakOp = ILIT(202)
-tagOf_PrimOp DeRefWeakOp = ILIT(203)
-tagOf_PrimOp MakeStablePtrOp = ILIT(204)
-tagOf_PrimOp DeRefStablePtrOp = ILIT(205)
-tagOf_PrimOp EqStablePtrOp = ILIT(206)
-tagOf_PrimOp (CCallOp _ _ _ _) = ILIT(207)
-tagOf_PrimOp ReallyUnsafePtrEqualityOp = ILIT(208)
-tagOf_PrimOp SeqOp = ILIT(209)
-tagOf_PrimOp ParOp = ILIT(210)
-tagOf_PrimOp ForkOp = ILIT(211)
-tagOf_PrimOp KillThreadOp = ILIT(212)
-tagOf_PrimOp DelayOp = ILIT(213)
-tagOf_PrimOp WaitReadOp = ILIT(214)
-tagOf_PrimOp WaitWriteOp = ILIT(215)
-tagOf_PrimOp ParGlobalOp = ILIT(216)
-tagOf_PrimOp ParLocalOp = ILIT(217)
-tagOf_PrimOp ParAtOp = ILIT(218)
-tagOf_PrimOp ParAtAbsOp = ILIT(219)
-tagOf_PrimOp ParAtRelOp = ILIT(220)
-tagOf_PrimOp ParAtForNowOp = ILIT(221)
-tagOf_PrimOp CopyableOp = ILIT(222)
-tagOf_PrimOp NoFollowOp = ILIT(223)
-tagOf_PrimOp NewMutVarOp = ILIT(224)
-tagOf_PrimOp ReadMutVarOp = ILIT(225)
-tagOf_PrimOp WriteMutVarOp = ILIT(226)
-tagOf_PrimOp SameMutVarOp = ILIT(227)
-tagOf_PrimOp CatchOp = ILIT(228)
-tagOf_PrimOp RaiseOp = ILIT(229)
+tagOf_PrimOp IsEmptyMVarOp = ILIT(200)
+tagOf_PrimOp MakeForeignObjOp = ILIT(201)
+tagOf_PrimOp WriteForeignObjOp = ILIT(202)
+tagOf_PrimOp MkWeakOp = ILIT(203)
+tagOf_PrimOp DeRefWeakOp = ILIT(204)
+tagOf_PrimOp MakeStablePtrOp = ILIT(205)
+tagOf_PrimOp DeRefStablePtrOp = ILIT(206)
+tagOf_PrimOp EqStablePtrOp = ILIT(207)
+tagOf_PrimOp (CCallOp _ _ _ _) = ILIT(208)
+tagOf_PrimOp ReallyUnsafePtrEqualityOp = ILIT(209)
+tagOf_PrimOp SeqOp = ILIT(210)
+tagOf_PrimOp ParOp = ILIT(211)
+tagOf_PrimOp ForkOp = ILIT(212)
+tagOf_PrimOp KillThreadOp = ILIT(213)
+tagOf_PrimOp DelayOp = ILIT(214)
+tagOf_PrimOp WaitReadOp = ILIT(215)
+tagOf_PrimOp WaitWriteOp = ILIT(216)
+tagOf_PrimOp ParGlobalOp = ILIT(217)
+tagOf_PrimOp ParLocalOp = ILIT(218)
+tagOf_PrimOp ParAtOp = ILIT(219)
+tagOf_PrimOp ParAtAbsOp = ILIT(220)
+tagOf_PrimOp ParAtRelOp = ILIT(221)
+tagOf_PrimOp ParAtForNowOp = ILIT(222)
+tagOf_PrimOp CopyableOp = ILIT(223)
+tagOf_PrimOp NoFollowOp = ILIT(224)
+tagOf_PrimOp NewMutVarOp = ILIT(225)
+tagOf_PrimOp ReadMutVarOp = ILIT(226)
+tagOf_PrimOp WriteMutVarOp = ILIT(227)
+tagOf_PrimOp SameMutVarOp = ILIT(228)
+tagOf_PrimOp CatchOp = ILIT(229)
+tagOf_PrimOp RaiseOp = ILIT(230)