ghc-9.2.8: The GHC API
Safe HaskellSafe-Inferred
LanguageHaskell2010

GHC.Types.Cpr

Description

Types for the Constructed Product Result lattice. GHC.Core.Opt.CprAnal and GHC.Core.Opt.WorkWrap.Utils are its primary customers via idCprInfo.

Synopsis

Documentation

data Cpr where Source #

Bundled Patterns

pattern ConCpr :: ConTag -> [Cpr] -> Cpr 

Instances

Instances details
Binary Cpr Source # 
Instance details

Defined in GHC.Types.Cpr

Methods

put_ :: BinHandle -> Cpr -> IO () Source #

put :: BinHandle -> Cpr -> IO (Bin Cpr) Source #

get :: BinHandle -> IO Cpr Source #

Outputable Cpr Source #

BNF: ``` cpr ::= '' -- TopCpr | n -- FlatConCpr n | n '(' cpr1 ',' cpr2 ',' ... ')' -- ConCpr n [cpr1,cpr2,...] | b -- BotCpr ``` Examples: * `f x = f x` has denotation b * `1(1,)` is a valid (nested) Cpr denotation for `(I# 42#, f 42)`.

Instance details

Defined in GHC.Types.Cpr

Methods

ppr :: Cpr -> SDoc Source #

Eq Cpr Source # 
Instance details

Defined in GHC.Types.Cpr

Methods

(==) :: Cpr -> Cpr -> Bool #

(/=) :: Cpr -> Cpr -> Bool #

data CprType Source #

The abstract domain \(A_t\) from the original 'CPR for Haskell' paper.

Constructors

CprType 

Fields

Instances

Instances details
Binary CprType Source # 
Instance details

Defined in GHC.Types.Cpr

Outputable CprType Source # 
Instance details

Defined in GHC.Types.Cpr

Methods

ppr :: CprType -> SDoc Source #

Eq CprType Source # 
Instance details

Defined in GHC.Types.Cpr

Methods

(==) :: CprType -> CprType -> Bool #

(/=) :: CprType -> CprType -> Bool #

unpackConFieldsCpr :: DataCon -> Cpr -> UnpackConFieldsResult Source #

Unpacks a ConCpr-shaped Cpr and returns the field Cprs wrapped in a ForeachField. Otherwise, it returns AllFieldsSame with the appropriate Cpr to assume for each field.

The use of UnpackConFieldsResult allows O(1) space for the common, non-ConCpr case.

newtype CprSig Source #

The arity of the wrapped CprType is the arity at which it is safe to unleash. See Note [Understanding DmdType and StrictSig] in GHC.Types.Demand

Constructors

CprSig 

Fields

Instances

Instances details
Binary CprSig Source # 
Instance details

Defined in GHC.Types.Cpr

Outputable CprSig Source #

Only print the CPR result

Instance details

Defined in GHC.Types.Cpr

Methods

ppr :: CprSig -> SDoc Source #

Eq CprSig Source # 
Instance details

Defined in GHC.Types.Cpr

Methods

(==) :: CprSig -> CprSig -> Bool #

(/=) :: CprSig -> CprSig -> Bool #

mkCprSigForArity :: Arity -> CprType -> CprSig Source #

Turns a CprType computed for the particular Arity into a CprSig unleashable at that arity. See Note [Understanding DmdType and StrictSig] in GHC.Types.Demand