-{-# 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
-
-----------------------------------------------------------------------------
--
-- Code generation for foreign calls.
emitOpenNursery,
) where
-#include "HsVersions.h"
-
import StgSyn
import CgProf
import CgBindery
import CLabel
import Cmm
import CmmUtils
-import MachOp
import SMRep
import ForeignCall
import ClosureInfo
import Constants
import StaticFlags
import Outputable
+import Module
+import FastString
+import BasicTypes
import Control.Monad
-- Code generation for Foreign Calls
cgForeignCall
- :: CmmFormals -- where to put the results
+ :: HintedCmmFormals -- where to put the results
-> ForeignCall -- the op
-> [StgArg] -- arguments
-> StgLiveVars -- live vars, in case we need to save them
| (stg_arg, (rep,expr)) <- stg_args `zip` reps_n_amodes,
nonVoidArg rep]
- arg_hints = zip arg_exprs (map (typeHint.stgArgType) stg_args)
+ arg_hints = zipWith CmmHinted
+ arg_exprs (map (typeForeignHint.stgArgType) stg_args)
-- in
emitForeignCall results fcall arg_hints live
emitForeignCall
- :: CmmFormals -- where to put the results
+ :: HintedCmmFormals -- where to put the results
-> ForeignCall -- the op
- -> [(CmmExpr,MachHint)] -- arguments
+ -> [CmmHinted CmmExpr] -- arguments
-> StgLiveVars -- live vars, in case we need to save them
-> Code
where
(call_args, cmm_target)
= case target of
- StaticTarget lbl -> (args, CmmLit (CmmLabel
- (mkForeignLabel lbl call_size False)))
- DynamicTarget -> case args of (fn,_):rest -> (rest, fn)
+ -- If the packageId is Nothing then the label is taken to be in the
+ -- package currently being compiled.
+ StaticTarget lbl mPkgId
+ -> let labelSource
+ = case mPkgId of
+ Nothing -> ForeignLabelInThisPackage
+ Just pkgId -> ForeignLabelInPackage pkgId
+ in ( args
+ , CmmLit (CmmLabel
+ (mkForeignLabel lbl call_size labelSource IsFunction)))
+
+ -- A label imported with "foreign import ccall "dynamic" ..."
+ -- Note: "dynamic" here doesn't mean "dynamic library".
+ -- Read the FFI spec for details.
+ DynamicTarget -> case args of
+ (CmmHinted fn _):rest -> (rest, fn)
+ [] -> panic "emitForeignCall: DynamicTarget []"
-- in the stdcall calling convention, the symbol needs @size appended
-- to it, where size is the total number of bytes of arguments. We
-- attach this info to the CLabel here, and the CLabel pretty printer
-- will generate the suffix when the label is printed.
call_size
- | StdCallConv <- cconv = Just (sum (map (arg_size.cmmExprRep.fst) args))
+ | StdCallConv <- cconv = Just (sum (map (arg_size.cmmExprType.hintlessCmm) args))
| otherwise = Nothing
-- ToDo: this might not be correct for 64-bit API
- arg_size rep = max (machRepByteWidth rep) wORD_SIZE
-
-emitForeignCall _ (DNCall _) _ _
- = panic "emitForeignCall: DNCall"
+ arg_size rep = max (widthInBytes (typeWidth rep)) wORD_SIZE
-- alternative entry point, used by CmmParse
emitForeignCall'
:: Safety
- -> CmmFormals -- where to put the results
+ -> HintedCmmFormals -- where to put the results
-> CmmCallTarget -- the op
- -> [(CmmExpr,MachHint)] -- arguments
+ -> [CmmHinted CmmExpr] -- arguments
-> Maybe [GlobalReg] -- live vars, in case we need to save them
-> C_SRT -- the SRT of the calls continuation
-> CmmReturnInfo
-> Code
-emitForeignCall' safety results target args vols srt ret
+emitForeignCall' safety results target args vols _srt ret
| not (playSafe safety) = do
temp_args <- load_args_into_temps args
let (caller_save, caller_load) = callerSaveVolatileRegs vols
| otherwise = do
-- Both 'id' and 'new_base' are GCKindNonPtr because they're
-- RTS only objects and are not subject to garbage collection
- id <- newNonPtrTemp wordRep
- new_base <- newNonPtrTemp (cmmRegRep (CmmGlobal BaseReg))
+ id <- newTemp bWord
+ new_base <- newTemp (cmmRegType (CmmGlobal BaseReg))
temp_args <- load_args_into_temps args
temp_target <- load_target_into_temp target
let (caller_save, caller_load) = callerSaveVolatileRegs vols
-- The CmmUnsafe arguments are only correct because this part
-- of the code hasn't been moved into the CPS pass yet.
-- Once that happens, this function will just emit a (CmmSafe srt) call,
- -- and the CPS will will be the one to convert that
+ -- and the CPS will be the one to convert that
-- to this sequence of three CmmUnsafe calls.
stmtC (CmmCall (CmmCallee suspendThread CCallConv)
- [ (id,PtrHint) ]
- [ (CmmReg (CmmGlobal BaseReg), PtrHint) ]
+ [ CmmHinted id AddrHint ]
+ [ CmmHinted (CmmReg (CmmGlobal BaseReg)) AddrHint ]
CmmUnsafe ret)
stmtC (CmmCall temp_target results temp_args CmmUnsafe ret)
stmtC (CmmCall (CmmCallee resumeThread CCallConv)
- [ (new_base, PtrHint) ]
- [ (CmmReg (CmmLocal id), PtrHint) ]
+ [ CmmHinted new_base AddrHint ]
+ [ CmmHinted (CmmReg (CmmLocal id)) AddrHint ]
CmmUnsafe ret)
-- Assign the result to BaseReg: we
-- might now have a different Capability!
stmtsC caller_load
emitLoadThreadState
-suspendThread = CmmLit (CmmLabel (mkRtsCodeLabel SLIT("suspendThread")))
-resumeThread = CmmLit (CmmLabel (mkRtsCodeLabel SLIT("resumeThread")))
+suspendThread, resumeThread :: CmmExpr
+suspendThread = CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "suspendThread")))
+resumeThread = CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "resumeThread")))
-- we might need to load arguments into temporaries before
--
-- This is a HACK; really it should be done in the back end, but
-- it's easier to generate the temporaries here.
+load_args_into_temps :: [CmmHinted CmmExpr] -> FCode [CmmHinted CmmExpr]
load_args_into_temps = mapM arg_assign_temp
- where arg_assign_temp (e,hint) = do
+ where arg_assign_temp (CmmHinted e hint) = do
tmp <- maybe_assign_temp e
- return (tmp,hint)
+ return (CmmHinted tmp hint)
+load_target_into_temp :: CmmCallTarget -> FCode CmmCallTarget
load_target_into_temp (CmmCallee expr conv) = do
tmp <- maybe_assign_temp expr
return (CmmCallee tmp conv)
load_target_into_temp other_target =
return other_target
+maybe_assign_temp :: CmmExpr -> FCode CmmExpr
maybe_assign_temp e
| hasNoGlobalRegs e = return e
| otherwise = do
-- don't use assignTemp, it uses its own notion of "trivial"
-- expressions, which are wrong here.
-- this is a NonPtr because it only duplicates an existing
- reg <- newNonPtrTemp (cmmExprRep e) --TODO FIXME NOW
+ reg <- newTemp (cmmExprType e) --TODO FIXME NOW
stmtC (CmmAssign (CmmLocal reg) e)
return (CmmReg (CmmLocal reg))
-- This stuff can't be done in suspendThread/resumeThread, because it
-- refers to global registers which aren't available in the C world.
+emitSaveThreadState :: Code
emitSaveThreadState = do
-- CurrentTSO->sp = Sp;
stmtC $ CmmStore (cmmOffset stgCurrentTSO tso_SP) stgSp
stmtC (CmmStore (cmmOffset stgCurrentTSO tso_CCCS) curCCS)
-- CurrentNursery->free = Hp+1;
+emitCloseNursery :: Code
emitCloseNursery = stmtC $ CmmStore nursery_bdescr_free (cmmOffsetW stgHp 1)
+emitLoadThreadState :: Code
emitLoadThreadState = do
- tso <- newNonPtrTemp wordRep -- TODO FIXME NOW
+ tso <- newTemp bWord -- TODO FIXME NOW
stmtsC [
-- tso = CurrentTSO;
CmmAssign (CmmLocal tso) stgCurrentTSO,
-- Sp = tso->sp;
CmmAssign sp (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_SP)
- wordRep),
+ bWord),
-- SpLim = tso->stack + RESERVED_STACK_WORDS;
CmmAssign spLim (cmmOffsetW (cmmOffset (CmmReg (CmmLocal tso)) tso_STACK)
- rESERVED_STACK_WORDS)
+ rESERVED_STACK_WORDS),
+ -- HpAlloc = 0;
+ -- HpAlloc is assumed to be set to non-zero only by a failed
+ -- a heap check, see HeapStackCheck.cmm:GC_GENERIC
+ CmmAssign hpAlloc (CmmLit zeroCLit)
]
emitOpenNursery
-- and load the current cost centre stack from the TSO when profiling:
when opt_SccProfilingOn $
stmtC (CmmStore curCCSAddr
- (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_CCCS) wordRep))
+ (CmmLoad (cmmOffset (CmmReg (CmmLocal tso)) tso_CCCS) bWord))
+emitOpenNursery :: Code
emitOpenNursery = stmtsC [
-- Hp = CurrentNursery->free - 1;
- CmmAssign hp (cmmOffsetW (CmmLoad nursery_bdescr_free wordRep) (-1)),
+ CmmAssign hp (cmmOffsetW (CmmLoad nursery_bdescr_free gcWord) (-1)),
-- HpLim = CurrentNursery->start +
-- CurrentNursery->blocks*BLOCK_SIZE_W - 1;
CmmAssign hpLim
(cmmOffsetExpr
- (CmmLoad nursery_bdescr_start wordRep)
+ (CmmLoad nursery_bdescr_start bWord)
(cmmOffset
(CmmMachOp mo_wordMul [
- CmmMachOp (MO_S_Conv I32 wordRep)
- [CmmLoad nursery_bdescr_blocks I32],
+ CmmMachOp (MO_SS_Conv W32 wordWidth)
+ [CmmLoad nursery_bdescr_blocks b32],
CmmLit (mkIntCLit bLOCK_SIZE)
])
(-1)
)
]
-
+nursery_bdescr_free, nursery_bdescr_start, nursery_bdescr_blocks :: CmmExpr
nursery_bdescr_free = cmmOffset stgCurrentNursery oFFSET_bdescr_free
nursery_bdescr_start = cmmOffset stgCurrentNursery oFFSET_bdescr_start
nursery_bdescr_blocks = cmmOffset stgCurrentNursery oFFSET_bdescr_blocks
+tso_SP, tso_STACK, tso_CCCS :: ByteOff
tso_SP = tsoFieldB oFFSET_StgTSO_sp
tso_STACK = tsoFieldB oFFSET_StgTSO_stack
tso_CCCS = tsoProfFieldB oFFSET_StgTSO_CCCS
tsoProfFieldB :: ByteOff -> ByteOff
tsoProfFieldB off = off + fixedHdrSize * wORD_SIZE
+stgSp, stgHp, stgCurrentTSO, stgCurrentNursery :: CmmExpr
stgSp = CmmReg sp
stgHp = CmmReg hp
stgCurrentTSO = CmmReg currentTSO
stgCurrentNursery = CmmReg currentNursery
+sp, spLim, hp, hpLim, currentTSO, currentNursery, hpAlloc :: CmmReg
sp = CmmGlobal Sp
spLim = CmmGlobal SpLim
hp = CmmGlobal Hp
hpLim = CmmGlobal HpLim
currentTSO = CmmGlobal CurrentTSO
currentNursery = CmmGlobal CurrentNursery
+hpAlloc = CmmGlobal HpAlloc
-- -----------------------------------------------------------------------------
-- For certain types passed to foreign calls, we adjust the actual
projects / ghc-hetmet.git / blobdiff