Primops in RULES generate warnings

import GHC.Prim

{-# RULES

"int2Word#/word2Int#" forall x. int2Word# (word2Int# x) = x

 #-}

produces the following warning:

    Rule "int2Word#/word2Int#" may never fire
      because `int2Word#' might inline first
    Probable fix: add an INLINE[n] or NOINLINE[n] pragma on `int2Word#'

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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Primops in RULES generate warnings