---- Block Ids, their environments, and their sets
-
-{- Note [Unique BlockId]
-~~~~~~~~~~~~~~~~~~~~~~~~
-Although a 'BlockId' is a local label, for reasons of implementation,
-'BlockId's must be unique within an entire compilation unit. The reason
-is that each local label is mapped to an assembly-language label, and in
-most assembly languages allow, a label is visible throughout the enitre
-compilation unit in which it appears.
--}
-
-newtype BlockId = BlockId Unique
- deriving (Eq,Ord)
-
-instance Uniquable BlockId where
- getUnique (BlockId u) = u
-
-instance Show BlockId where
- show (BlockId u) = show u
-
-instance Outputable BlockId where
- ppr = ppr . getUnique
-
-
-type BlockEnv a = UniqFM {- BlockId -} a
-emptyBlockEnv :: BlockEnv a
-emptyBlockEnv = emptyUFM
-lookupBlockEnv :: BlockEnv a -> BlockId -> Maybe a
-lookupBlockEnv = lookupUFM
-extendBlockEnv :: BlockEnv a -> BlockId -> a -> BlockEnv a
-extendBlockEnv = addToUFM
-mkBlockEnv :: [(BlockId,a)] -> BlockEnv a
-mkBlockEnv = listToUFM
-
-type BlockSet = UniqSet BlockId
-emptyBlockSet :: BlockSet
-emptyBlockSet = emptyUniqSet
-elemBlockSet :: BlockId -> BlockSet -> Bool
-elemBlockSet = elementOfUniqSet
-extendBlockSet :: BlockSet -> BlockId -> BlockSet
-extendBlockSet = addOneToUniqSet
-mkBlockSet :: [BlockId] -> BlockSet
-mkBlockSet = mkUniqSet
-
-----------------------------------------------------------------