%
-% (c) The AQUA Project, Glasgow University, 1994-1995
+% (c) The AQUA Project, Glasgow University, 1994-1996
%
\section[DsCCall]{Desugaring \tr{_ccall_}s and \tr{_casm_}s}
module DsCCall ( dsCCall ) where
-IMPORT_Trace
+import Ubiq
-import AbsSyn -- the stuff being desugared
-import PlainCore -- the output of desugaring
-import DsMonad -- the monadery used in the desugarer
+import CoreSyn
-import AbsPrel
-import TysPrim -- ****** ToDo: PROPERLY
-import TysWiredIn
-import AbsUniType
+import DsMonad
import DsUtils
-import Id ( getInstantiatedDataConSig, mkTupleCon, DataCon(..) )
-import Maybes ( maybeToBool, Maybe(..) )
+
+import CoreUtils ( coreExprType )
+import Id ( getInstantiatedDataConSig, mkTupleCon )
+import Maybes ( maybeToBool )
+import PprStyle ( PprStyle(..) )
+import PprType ( GenType{-instances-}, GenTyVar{-instance-} )
+import PrelInfo ( byteArrayPrimTy, getStatePairingConInfo,
+ packStringForCId, realWorldStatePrimTy,
+ realWorldStateTy, realWorldTy, stateDataCon,
+ stringTy )
import Pretty
-#if USE_ATTACK_PRAGMAS
-import Unique
-#endif
-import Util
+import PrimOp ( PrimOp(..) )
+import Type ( isPrimType, maybeAppDataTyCon, eqTy )
+import TyVar ( GenTyVar{-instance-} )
+import Unique ( Unique{-instances-} )
+import Util ( pprPanic, panic )
+
+maybeBoxedPrimType = panic "DsCCall.maybeBoxedPrimType"
\end{code}
Desugaring of @ccall@s consists of adding some state manipulation,
available from the type. For each boxed-primitive argument, we
transform:
\begin{verbatim}
- _ccall_ foo [ r, t1, ... tm ] e1 ... em
+ _ccall_ foo [ r, t1, ... tm ] e1 ... em
|
|
V
|
V
\ s# -> case (ccall# foo [ r, t1#, ... tm# ] s# e1# ... em#) of
- (StateAnd<r># result# state#) -> (R# result#, realWorld#)
+ (StateAnd<r># result# state#) -> (R# result#, realWorld#)
\end{verbatim}
\begin{code}
dsCCall :: FAST_STRING -- C routine to invoke
- -> [PlainCoreExpr] -- Arguments (desugared)
+ -> [CoreExpr] -- Arguments (desugared)
-> Bool -- True <=> might cause Haskell GC
-> Bool -- True <=> really a "_casm_"
- -> UniType -- Type of the result (a boxed-prim type)
- -> DsM PlainCoreExpr
+ -> Type -- Type of the result (a boxed-prim type)
+ -> DsM CoreExpr
dsCCall label args may_gc is_asm result_ty
= newSysLocalDs realWorldStateTy `thenDs` \ old_s ->
- mapAndUnzipDs unboxArg (CoVar old_s : args) `thenDs` \ (final_args, arg_wrappers) ->
+ mapAndUnzipDs unboxArg (Var old_s : args) `thenDs` \ (final_args, arg_wrappers) ->
boxResult result_ty `thenDs` \ (final_result_ty, res_wrapper) ->
let
the_ccall_op = CCallOp label is_asm may_gc
- (map typeOfCoreExpr final_args)
+ (map coreExprType final_args)
final_result_ty
in
- mkCoPrimDs the_ccall_op
+ mkPrimDs the_ccall_op
[] -- ***NOTE*** no ty apps; the types are inside the_ccall_op.
final_args `thenDs` \ the_prim_app ->
let
the_body = foldr apply (res_wrapper the_prim_app) arg_wrappers
in
- returnDs (CoLam [old_s] the_body)
+ returnDs (Lam (ValBinder old_s) the_body)
where
apply f x = f x
\end{code}
\begin{code}
-unboxArg :: PlainCoreExpr -- The supplied argument
- -> DsM (PlainCoreExpr, -- To pass as the actual argument
- PlainCoreExpr -> PlainCoreExpr -- Wrapper to unbox the arg
+unboxArg :: CoreExpr -- The supplied argument
+ -> DsM (CoreExpr, -- To pass as the actual argument
+ CoreExpr -> CoreExpr -- Wrapper to unbox the arg
)
unboxArg arg
-- Primitive types
-- ADR Question: can this ever be used? None of the PrimTypes are
-- instances of the _CCallable class.
- | isPrimType arg_ty
+ | isPrimType arg_ty
= returnDs (arg, \body -> body)
-- Strings
- | arg_ty == stringTy
+ | arg_ty `eqTy` stringTy
-- ToDo (ADR): - allow synonyms of Strings too?
= newSysLocalDs byteArrayPrimTy `thenDs` \ prim_arg ->
- mkCoAppDs (CoVar packStringForCId) arg `thenDs` \ pack_appn ->
- returnDs (CoVar prim_arg,
- \body -> CoCase pack_appn (CoPrimAlts []
- (CoBindDefault prim_arg body))
+ mkAppDs (Var packStringForCId) [] [arg] `thenDs` \ pack_appn ->
+ returnDs (Var prim_arg,
+ \body -> Case pack_appn (PrimAlts []
+ (BindDefault prim_arg body))
)
| null data_cons
-- Byte-arrays, both mutable and otherwise
-- (HACKy method -- but we really don't want the TyCons wired-in...) [WDP 94/10]
- | is_data_type &&
+ | is_data_type &&
length data_con_arg_tys == 2 &&
not (isPrimType data_con_arg_ty1) &&
isPrimType data_con_arg_ty2
-- and, of course, it is an instance of _CCallable
--- ( tycon == byteArrayTyCon ||
+-- ( tycon == byteArrayTyCon ||
-- tycon == mutableByteArrayTyCon )
= newSysLocalsDs data_con_arg_tys `thenDs` \ vars@[ixs_var, arr_cts_var] ->
- returnDs (CoVar arr_cts_var,
- \ body -> CoCase arg (CoAlgAlts [(the_data_con,vars,body)]
- CoNoDefault)
+ returnDs (Var arr_cts_var,
+ \ body -> Case arg (AlgAlts [(the_data_con,vars,body)]
+ NoDefault)
)
-- Data types with a single constructor, which has a single, primitive-typed arg
| maybeToBool maybe_boxed_prim_arg_ty
= newSysLocalDs the_prim_arg_ty `thenDs` \ prim_arg ->
- returnDs (CoVar prim_arg,
- \ body -> CoCase arg (CoAlgAlts [(box_data_con,[prim_arg],body)]
- CoNoDefault)
+ returnDs (Var prim_arg,
+ \ body -> Case arg (AlgAlts [(box_data_con,[prim_arg],body)]
+ NoDefault)
)
-- ... continued below ....
\end{code}
let
alts = [ (con, [], mkMachInt i) | (con,i) <- data_cons `zip` [0..] ]
- arg_tag = CoCase arg (CoAlgAlts alts) CoNoDefault
+ arg_tag = Case arg (AlgAlts alts) NoDefault
in
- returnDs (CoVar prim_arg,
- \ body -> CoCase arg_tag (CoPrimAlts [(prim_arg, body)] CoNoDefault)
+ returnDs (Var prim_arg,
+ \ body -> Case arg_tag (PrimAlts [(prim_arg, body)] NoDefault)
)
#endif
\end{code}
| otherwise
= pprPanic "unboxArg: " (ppr PprDebug arg_ty)
where
- arg_ty = typeOfCoreExpr arg
+ arg_ty = coreExprType arg
maybe_boxed_prim_arg_ty = maybeBoxedPrimType arg_ty
(Just (box_data_con, the_prim_arg_ty)) = maybe_boxed_prim_arg_ty
- maybe_data_type = getUniDataTyCon_maybe arg_ty
+ maybe_data_type = maybeAppDataTyCon arg_ty
is_data_type = maybeToBool maybe_data_type
(Just (tycon, tycon_arg_tys, data_cons)) = maybe_data_type
(the_data_con : other_data_cons) = data_cons
\begin{code}
tuple_con_2 = mkTupleCon 2 -- out here to avoid CAF (sigh)
-covar_tuple_con_0 = CoVar (mkTupleCon 0) -- ditto
+covar_tuple_con_0 = Var (mkTupleCon 0) -- ditto
-boxResult :: UniType -- Type of desired result
- -> DsM (UniType, -- Type of the result of the ccall itself
- PlainCoreExpr -> PlainCoreExpr) -- Wrapper for the ccall
+boxResult :: Type -- Type of desired result
+ -> DsM (Type, -- Type of the result of the ccall itself
+ CoreExpr -> CoreExpr) -- Wrapper for the ccall
-- to box the result
boxResult result_ty
| null data_cons
(null other_data_cons) && -- Just one constr
not (null data_con_arg_tys) && null other_args_tys && -- Just one arg
isPrimType the_prim_result_ty -- of primitive type
- =
+ =
newSysLocalDs realWorldStatePrimTy `thenDs` \ prim_state_id ->
newSysLocalDs the_prim_result_ty `thenDs` \ prim_result_id ->
- mkCoConDs stateDataCon [realWorldTy] [CoVar prim_state_id] `thenDs` \ new_state ->
- mkCoConDs the_data_con tycon_arg_tys [CoVar prim_result_id] `thenDs` \ the_result ->
-
- mkCoConDs tuple_con_2
- [result_ty, realWorldStateTy]
- [the_result, new_state] `thenDs` \ the_pair ->
+ mkConDs stateDataCon [realWorldTy] [Var prim_state_id] `thenDs` \ new_state ->
+ mkConDs the_data_con tycon_arg_tys [Var prim_result_id] `thenDs` \ the_result ->
+
+ mkConDs tuple_con_2
+ [result_ty, realWorldStateTy]
+ [the_result, new_state] `thenDs` \ the_pair ->
let
the_alt = (state_and_prim_datacon, [prim_state_id, prim_result_id], the_pair)
in
returnDs (state_and_prim_ty,
- \prim_app -> CoCase prim_app (CoAlgAlts [the_alt] CoNoDefault)
+ \prim_app -> Case prim_app (AlgAlts [the_alt] NoDefault)
)
-- Data types with a single nullary constructor
| (maybeToBool maybe_data_type) && -- Data type
(null other_data_cons) && -- Just one constr
(null data_con_arg_tys)
- =
+ =
newSysLocalDs realWorldStatePrimTy `thenDs` \ prim_state_id ->
- mkCoConDs stateDataCon [realWorldTy] [CoVar prim_state_id] `thenDs` \ new_state ->
-
- mkCoConDs tuple_con_2
- [result_ty, realWorldStateTy]
- [covar_tuple_con_0, new_state] `thenDs` \ the_pair ->
+ mkConDs stateDataCon [realWorldTy] [Var prim_state_id] `thenDs` \ new_state ->
+
+ mkConDs tuple_con_2
+ [result_ty, realWorldStateTy]
+ [covar_tuple_con_0, new_state] `thenDs` \ the_pair ->
let
the_alt = (stateDataCon, [prim_state_id], the_pair)
in
returnDs (realWorldStateTy,
- \prim_app -> CoCase prim_app (CoAlgAlts [the_alt] CoNoDefault)
+ \prim_app -> Case prim_app (AlgAlts [the_alt] NoDefault)
)
#if 0
-- Data types with several nullary constructors (Enumerated types)
| isEnumerationType result_ty && -- Enumeration
(length data_cons) <= 5 -- fairly short
- =
+ =
newSysLocalDs realWorldStatePrimTy `thenDs` \ prim_state_id ->
newSysLocalDs intPrimTy `thenDs` \ prim_result_id ->
- mkCoConDs stateDataCon [realWorldTy] [CoVar prim_state_id] `thenDs` \ new_state ->
+ mkConDs stateDataCon [realWorldTy] [Var prim_state_id] `thenDs` \ new_state ->
let
alts = [ (mkMachInt i, con) | (i, con) <- [0..] `zip` data_cons ]
- the_result = CoCase prim_result_id (CoPrimAlts alts) CoNoDefault
+ the_result = Case prim_result_id (PrimAlts alts) NoDefault
in
- mkCoConDs (mkTupleCon 2)
+ mkConDs (mkTupleCon 2)
[result_ty, realWorldStateTy]
[the_result, new_state] `thenDs` \ the_pair ->
let
the_alt = (state_and_prim_datacon, [prim_state_id, prim_result_id], the_pair)
in
returnDs (state_and_prim_ty,
- \prim_app -> CoCase prim_app (CoAlgAlts [the_alt] CoNoDefault)
+ \prim_app -> Case prim_app (AlgAlts [the_alt] NoDefault)
)
#endif
- | otherwise
+ | otherwise
= pprPanic "boxResult: " (ppr PprDebug result_ty)
where
- maybe_data_type = getUniDataTyCon_maybe result_ty
+ maybe_data_type = maybeAppDataTyCon result_ty
Just (tycon, tycon_arg_tys, data_cons) = maybe_data_type
(the_data_con : other_data_cons) = data_cons
projects / ghc-hetmet.git / blobdiff