-- | Find all locally-defined free Ids or type variables in an expression
-- returning a composable FV computation. See Note [FV naming conventions] in FV
-- for why export it.
exprFVs :: CoreExpr -> FV
exprFVs = filterFV isLocalVar . expr_fvs
exprFVs :: CoreExpr -> FV
exprFVs = filterFV isLocalVar . expr_fvs
exprFVs = filterFV isLocalVar . expr_fvs