\begin{code}
module PrimOp (
PrimOp(..), allThePrimOps,
- primOpType, primOpSig, primOpUsg, primOpArity,
+ primOpType, primOpSig, primOpArity,
mkPrimOpIdName, primOpRdrName, primOpTag, primOpOcc,
commutableOp,
primOpOkForSpeculation, primOpIsCheap, primOpIsDupable,
primOpHasSideEffects,
- getPrimOpResultInfo, PrimOpResultInfo(..)
+ getPrimOpResultInfo, PrimOpResultInfo(..),
+
+ eqCharName, eqIntName, eqFloatName, eqDoubleName, neqIntName,
) where
#include "HsVersions.h"
import TysPrim
import TysWiredIn
-import Demand ( wwLazy, wwPrim, wwStrict, StrictnessInfo(..) )
+import NewDemand
import Var ( TyVar )
import Name ( Name, mkWiredInName )
import RdrName ( RdrName, mkRdrOrig )
import OccName ( OccName, pprOccName, mkVarOcc )
-import TyCon ( TyCon )
-import Type ( Type, mkForAllTys, mkFunTy, mkFunTys, typePrimRep,
- splitFunTy_maybe, splitAlgTyConApp_maybe, splitTyConApp,
- mkUTy, usOnce, usMany
- )
+import TyCon ( TyCon, isPrimTyCon, tyConPrimRep )
+import Type ( Type, mkForAllTys, mkFunTy, mkFunTys, typePrimRep, tyConAppTyCon )
+import PprType () -- get at Outputable Type instance.
import Unique ( mkPrimOpIdUnique )
import BasicTypes ( Arity, Boxity(..) )
-import PrelNames ( pREL_GHC, pREL_GHC_Name )
+import PrelNames ( gHC_PRIM, gHC_PRIM_Name )
import Outputable
-import Util ( zipWithEqual )
import FastTypes
\end{code}
Not all primops are strict!
\begin{code}
-primOpStrictness :: PrimOp -> Arity -> StrictnessInfo
+primOpStrictness :: PrimOp -> Arity -> StrictSig
-- See Demand.StrictnessInfo for discussion of what the results
-- The arity should be the arity of the primop; that's why
-- this function isn't exported.
stable name.
-[Alastair Reid is to blame for this!]
-
-These days, (Glasgow) Haskell seems to have a bit of everything from
-other languages: strict operations, mutable variables, sequencing,
-pointers, etc. About the only thing left is LISP's ability to test
-for pointer equality. So, let's add it in!
-
-\begin{verbatim}
-reallyUnsafePtrEquality :: a -> a -> Int#
-\end{verbatim}
-
-which tests any two closures (of the same type) to see if they're the
-same. (Returns $0$ for @False@, $\neq 0$ for @True@ - to avoid
-difficulties of trying to box up the result.)
-
-NB This is {\em really unsafe\/} because even something as trivial as
-a garbage collection might change the answer by removing indirections.
-Still, no-one's forcing you to use it. If you're worried about little
-things like loss of referential transparency, you might like to wrap
-it all up in a monad-like thing as John O'Donnell and John Hughes did
-for non-determinism (1989 (Fraserburgh) Glasgow FP Workshop
-Proceedings?)
-
-I'm thinking of using it to speed up a critical equality test in some
-graphics stuff in a context where the possibility of saying that
-denotationally equal things aren't isn't a problem (as long as it
-doesn't happen too often.) ADR
-
-To Will: Jim said this was already in, but I can't see it so I'm
-adding it. Up to you whether you add it. (Note that this could have
-been readily implemented using a @veryDangerousCCall@ before they were
-removed...)
-
-
-- HWL: The first 4 Int# in all par... annotations denote:
-- name, granularity info, size of result, degree of parallelism
-- Same structure as _seq_ i.e. returns Int#
Some PrimOps need to be called out-of-line because they either need to
perform a heap check or they block.
+
\begin{code}
+primOpOutOfLine :: PrimOp -> Bool
#include "primop-out-of-line.hs-incl"
\end{code}
-- We have to pass in the Id itself because it's a WiredInId
-- and hence recursive
mkPrimOpIdName op
- = mkWiredInName pREL_GHC (primOpOcc op) (mkPrimOpIdUnique (primOpTag op))
+ = mkWiredInName gHC_PRIM (primOpOcc op) (mkPrimOpIdUnique (primOpTag op))
primOpRdrName :: PrimOp -> RdrName
-primOpRdrName op = mkRdrOrig pREL_GHC_Name (primOpOcc op)
+primOpRdrName op = mkRdrOrig gHC_PRIM_Name (primOpOcc op)
primOpOcc :: PrimOp -> OccName
primOpOcc op = case (primOpInfo op) of
-- (type variables, argument types, result type)
-- It also gives arity, strictness info
-primOpSig :: PrimOp -> ([TyVar], [Type], Type, Arity, StrictnessInfo)
+primOpSig :: PrimOp -> ([TyVar], [Type], Type, Arity, StrictSig)
primOpSig op
= (tyvars, arg_tys, res_ty, arity, primOpStrictness op arity)
where
Compare occ ty -> ([], [ty,ty], boolTy)
GenPrimOp occ tyvars arg_tys res_ty
-> (tyvars, arg_tys, res_ty)
-
--- primOpUsg is like primOpSig but the types it yields are the
--- appropriate sigma (i.e., usage-annotated) types,
--- as required by the UsageSP inference.
-
-primOpUsg :: PrimOp -> ([TyVar],[Type],Type)
-#include "primop-usage.hs-incl"
-
--- Things with no Haskell pointers inside: in actuality, usages are
--- irrelevant here (hence it doesn't matter that some of these
--- apparently permit duplication; since such arguments are never
--- ENTERed anyway, the usage annotation they get is entirely irrelevant
--- except insofar as it propagates to infect other values that *are*
--- pointed.
-
-
--- Helper bits & pieces for usage info.
-
-mkZ = mkUTy usOnce -- pointed argument used zero
-mkO = mkUTy usOnce -- pointed argument used once
-mkM = mkUTy usMany -- pointed argument used multiply
-mkP = mkUTy usOnce -- unpointed argument
-mkR = mkUTy usMany -- unpointed result
-
-nomangle op
- = case primOpSig op of
- (tyvars, arg_tys, res_ty, _, _)
- -> (tyvars, map mkP arg_tys, mkR res_ty)
-
-mangle op fs g
- = case primOpSig op of
- (tyvars, arg_tys, res_ty, _, _)
- -> (tyvars, zipWithEqual "primOpUsg" ($) fs arg_tys, g res_ty)
-
-inFun op f g ty
- = case splitFunTy_maybe ty of
- Just (a,b) -> mkFunTy (f a) (g b)
- Nothing -> pprPanic "primOpUsg:inFun" (ppr op <+> ppr ty)
-
-inUB op fs ty
- = case splitTyConApp ty of
- (tc,tys) -> ASSERT( tc == tupleTyCon Unboxed (length fs) )
- mkTupleTy Unboxed (length fs) (zipWithEqual "primOpUsg" ($) fs tys)
\end{code}
\begin{code}
getPrimOpResultInfo :: PrimOp -> PrimOpResultInfo
getPrimOpResultInfo op
= case (primOpInfo op) of
- Dyadic _ ty -> ReturnsPrim (typePrimRep ty)
- Monadic _ ty -> ReturnsPrim (typePrimRep ty)
- Compare _ ty -> ReturnsAlg boolTyCon
- GenPrimOp _ _ _ ty ->
- let rep = typePrimRep ty in
- case rep of
- PtrRep -> case splitAlgTyConApp_maybe ty of
- Nothing -> pprPanic "getPrimOpResultInfo"
- (ppr ty <+> ppr op)
- Just (tc,_,_) -> ReturnsAlg tc
- other -> ReturnsPrim other
+ Dyadic _ ty -> ReturnsPrim (typePrimRep ty)
+ Monadic _ ty -> ReturnsPrim (typePrimRep ty)
+ Compare _ ty -> ReturnsAlg boolTyCon
+ GenPrimOp _ _ _ ty | isPrimTyCon tc -> ReturnsPrim (tyConPrimRep tc)
+ | otherwise -> ReturnsAlg tc
+ where
+ tc = tyConAppTyCon ty
+ -- All primops return a tycon-app result
+ -- The tycon can be an unboxed tuple, though, which
+ -- gives rise to a ReturnAlg
\end{code}
The commutable ops are those for which we will try to move constants
Output stuff:
\begin{code}
pprPrimOp :: PrimOp -> SDoc
-pprPrimOp other_op
- = getPprStyle $ \ sty ->
- if ifaceStyle sty then -- For interfaces Print it qualified with PrelGHC.
- ptext SLIT("PrelGHC.") <> pprOccName occ
- else
- pprOccName occ
- where
- occ = primOpOcc other_op
+pprPrimOp other_op = pprOccName (primOpOcc other_op)
\end{code}
+Names for some primops (for ndpFlatten/FlattenMonad.lhs)
+\begin{code}
+eqCharName = mkPrimOpIdName CharEqOp
+eqIntName = mkPrimOpIdName IntEqOp
+eqFloatName = mkPrimOpIdName FloatEqOp
+eqDoubleName = mkPrimOpIdName DoubleEqOp
+neqIntName = mkPrimOpIdName IntNeOp
+\end{code}
projects / ghc-hetmet.git / blobdiff