Desugaring foreign declarations (see also DsCCall).
\begin{code}
-{-# OPTIONS -w #-}
--- The above warning supression flag is a temporary kludge.
--- While working on this module you are encouraged to remove it and fix
--- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
--- for details
-
module DsForeign ( dsForeigns ) where
#include "HsVersions.h"
import HsSyn
import DataCon
-import MachOp
-import SMRep
import CoreUtils
+import CoreUnfold
import Id
import Literal
import Module
import TyCon
import Coercion
import TcType
+import Var
+import CmmExpr
+import CmmUtils
import HscTypes
import ForeignCall
import TysWiredIn
do_decl (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv))) = do
(h, c, _, _) <- dsFExport id (idType id) ext_nm cconv False
return (h, c, [id], [])
+
+ do_decl d = pprPanic "dsForeigns/do_decl" (ppr d)
\end{code}
dsFImport :: Id
-> ForeignImport
-> DsM ([Binding], SDoc, SDoc)
-dsFImport id (CImport cconv safety header lib spec) = do
+dsFImport id (CImport cconv safety _ _ spec) = do
(ids, h, c) <- dsCImport id spec cconv safety
return (ids, h, c)
(resTy, foRhs) <- resultWrapper ty
ASSERT(fromJust resTy `coreEqType` addrPrimTy) -- typechecker ensures this
let
- rhs = foRhs (mkLit (MachLabel cid stdcall_info))
+ rhs = foRhs (Lit (MachLabel cid stdcall_info))
stdcall_info = fun_type_arg_stdcall_info cconv ty
in
return ([(id, rhs)], empty, empty)
| Just (tc,[arg_ty]) <- splitTyConApp_maybe (repType ty),
tyConUnique tc == funPtrTyConKey
= let
- (_tvs,sans_foralls) = tcSplitForAllTys arg_ty
- (fe_arg_tys, orig_res_ty) = tcSplitFunTys sans_foralls
- in
- Just $ sum (map (machRepByteWidth . typeMachRep . getPrimTyOf) fe_arg_tys)
+ (_tvs,sans_foralls) = tcSplitForAllTys arg_ty
+ (fe_arg_tys, _orig_res_ty) = tcSplitFunTys sans_foralls
+ in Just $ sum (map (widthInBytes . typeWidth . typeCmmType . getPrimTyOf) fe_arg_tys)
fun_type_arg_stdcall_info _other_conv _
= Nothing
\end{code}
%************************************************************************
\begin{code}
+dsFCall :: Id -> ForeignCall -> DsM ([(Id, Expr TyVar)], SDoc, SDoc)
dsFCall fn_id fcall = do
let
ty = idType fn_id
augmentResultDs
| forDotnet = do
- err_res <- newSysLocalDs addrPrimTy
return (\ (mb_res_ty, resWrap) ->
case mb_res_ty of
Nothing -> (Just (mkTyConApp (tupleTyCon Unboxed 1)
-- Build the wrapper
work_app = mkApps (mkVarApps (Var work_id) tvs) val_args
wrapper_body = foldr ($) (res_wrapper work_app) arg_wrappers
- wrap_rhs = mkInlineMe (mkLams (tvs ++ args) wrapper_body)
+ wrap_rhs = mkLams (tvs ++ args) wrapper_body
+ fn_id_w_inl = fn_id `setIdUnfolding` mkInlineRule wrap_rhs (length args)
- return ([(work_id, work_rhs), (fn_id, wrap_rhs)], empty, empty)
+ return ([(work_id, work_rhs), (fn_id_w_inl, wrap_rhs)], empty, empty)
\end{code}
For each `@foreign export foo@' in a module M we generate:
\begin{itemize}
\item a C function `@foo@', which calls
-\item a Haskell stub `@M.$ffoo@', which calls
+\item a Haskell stub `@M.\$ffoo@', which calls
\end{itemize}
the user-written Haskell function `@M.foo@'.
(res_ty, -- t
is_IO_res_ty) <- -- Bool
case tcSplitIOType_maybe orig_res_ty of
- Just (ioTyCon, res_ty, co) -> return (res_ty, True)
+ Just (_ioTyCon, res_ty, _co) -> return (res_ty, True)
-- The function already returns IO t
-- ToDo: what about the coercion?
Nothing -> return (orig_res_ty, False)
-}
adj_args = [ mkIntLitInt (ccallConvToInt cconv)
, Var stbl_value
- , mkLit (MachLabel fe_nm mb_sz_args)
- , mkLit (mkStringLit typestring)
+ , Lit (MachLabel fe_nm mb_sz_args)
+ , Lit (mkMachString typestring)
]
-- name of external entry point providing these services.
-- (probably in the RTS.)
)
mkFExportCBits c_nm maybe_target arg_htys res_hty is_IO_res_ty cc
= (header_bits, c_bits, type_string,
- sum [ machRepByteWidth rep | (_,_,_,rep) <- aug_arg_info] -- all the args
+ sum [ widthInBytes (typeWidth rep) | (_,_,_,rep) <- aug_arg_info] -- all the args
+ -- NB. the calculation here isn't strictly speaking correct.
+ -- We have a primitive Haskell type (eg. Int#, Double#), and
+ -- we want to know the size, when passed on the C stack, of
+ -- the associated C type (eg. HsInt, HsDouble). We don't have
+ -- this information to hand, but we know what GHC's conventions
+ -- are for passing around the primitive Haskell types, so we
+ -- use that instead. I hope the two coincide --SDM
)
where
-- list the arguments to the C function
arg_info :: [(SDoc, -- arg name
SDoc, -- C type
Type, -- Haskell type
- MachRep)] -- the MachRep
+ CmmType)] -- the CmmType
arg_info = [ let stg_type = showStgType ty in
(arg_cname n stg_type,
stg_type,
ty,
- typeMachRep (getPrimTyOf ty))
+ typeCmmType (getPrimTyOf ty))
| (ty,n) <- zip arg_htys [1::Int ..] ]
arg_cname n stg_ty
stable_ptr_arg =
(text "the_stableptr", text "StgStablePtr", undefined,
- typeMachRep (mkStablePtrPrimTy alphaTy))
+ typeCmmType (mkStablePtrPrimTy alphaTy))
-- stuff to do with the return type of the C function
res_hty_is_unit = res_hty `coreEqType` unitTy -- Look through any newtypes
pprCconv = case cc of
CCallConv -> empty
StdCallConv -> text (ccallConvAttribute cc)
+ CmmCallConv -> panic "mkFExportCBits/pprCconv CmmCallConv"
header_bits = ptext (sLit "extern") <+> fun_proto <> semi
]
--- NB. the calculation here isn't strictly speaking correct.
--- We have a primitive Haskell type (eg. Int#, Double#), and
--- we want to know the size, when passed on the C stack, of
--- the associated C type (eg. HsInt, HsDouble). We don't have
--- this information to hand, but we know what GHC's conventions
--- are for passing around the primitive Haskell types, so we
--- use that instead. I hope the two coincide --SDM
-typeMachRep ty = argMachRep (typeCgRep ty)
-
mkHObj :: Type -> SDoc
mkHObj t = text "rts_mk" <> text (showFFIType t)
Just (tc,_) -> tc
Nothing -> pprPanic "showFFIType" (ppr t)
+insertRetAddr :: CCallConv -> [(SDoc, SDoc, Type, CmmType)]
+ -> [(SDoc, SDoc, Type, CmmType)]
#if !defined(x86_64_TARGET_ARCH)
insertRetAddr CCallConv args = ret_addr_arg : args
insertRetAddr _ args = args
-- need to flush a register argument to the stack (See rts/Adjustor.c for
-- details).
insertRetAddr CCallConv args = go 0 args
- where go 6 args = ret_addr_arg : args
+ where go :: Int -> [(SDoc, SDoc, Type, CmmType)]
+ -> [(SDoc, SDoc, Type, CmmType)]
+ go 6 args = ret_addr_arg : args
go n (arg@(_,_,_,rep):args)
- | I64 <- rep = arg : go (n+1) args
+ | cmmEqType_ignoring_ptrhood rep b64 = arg : go (n+1) args
| otherwise = arg : go n args
- go n [] = []
+ go _ [] = []
insertRetAddr _ args = args
#endif
+ret_addr_arg :: (SDoc, SDoc, Type, CmmType)
ret_addr_arg = (text "original_return_addr", text "void*", undefined,
- typeMachRep addrPrimTy)
+ typeCmmType addrPrimTy)
-- This function returns the primitive type associated with the boxed
-- type argument to a foreign export (eg. Int ==> Int#).