import Name
import MkId
import Id
-import FiniteMap
import ForeignCall
import HscTypes
import CoreUtils
import Type
import DataCon
import TyCon
-import Type
+-- import Type
import Util
-import DataCon
+-- import DataCon
import Var
import VarSet
import TysPrim
import Foreign
import Foreign.C
-import GHC.Exts ( Int(..), ByteArray# )
+-- import GHC.Exts ( Int(..) )
import Control.Monad ( when )
import Data.Char
import Module
import IdInfo
+import Data.Map (Map)
+import qualified Data.Map as Map
+import qualified FiniteMap as Map
+
-- -----------------------------------------------------------------------------
-- Generating byte code for a complete module
type BCInstrList = OrdList BCInstr
-type Sequel = Int -- back off to this depth before ENTER
+type Sequel = Word16 -- back off to this depth before ENTER
-- Maps Ids to the offset from the stack _base_ so we don't have
-- to mess with it after each push/pop.
-type BCEnv = FiniteMap Id Int -- To find vars on the stack
+type BCEnv = Map Id Word16 -- To find vars on the stack
{-
ppBCEnv :: BCEnv -> SDoc
ppBCEnv p
= text "begin-env"
- $$ nest 4 (vcat (map pp_one (sortBy cmp_snd (fmToList p))))
+ $$ nest 4 (vcat (map pp_one (sortBy cmp_snd (Map.toList p))))
$$ text "end-env"
where
pp_one (var, offset) = int offset <> colon <+> ppr var <+> ppr (idCgRep var)
-> BCInstrList
-> Either [AnnAlt Id VarSet] (AnnExpr Id VarSet)
-> Int
- -> Int
+ -> Word16
-> [StgWord]
-> Bool -- True <=> is a return point, rather than a function
-> [BcPtr]
-- (hopefully rare) cases when the (overestimated) stack use
-- exceeds iNTERP_STACK_CHECK_THRESH.
maybe_with_stack_check
- | is_ret && stack_usage < aP_STACK_SPLIM = peep_d
+ | is_ret && stack_usage < fromIntegral aP_STACK_SPLIM = peep_d
-- don't do stack checks at return points,
-- everything is aggregated up to the top BCO
-- (which must be a function).
-- That is, unless the stack usage is >= AP_STACK_SPLIM,
-- see bug #1466.
- | stack_usage >= iNTERP_STACK_CHECK_THRESH
+ | stack_usage >= fromIntegral iNTERP_STACK_CHECK_THRESH
= STKCHECK stack_usage : peep_d
| otherwise
= peep_d -- the supposedly common case
{-
| trace (showSDoc (
(char ' '
- $$ (ppr.filter (not.isTyVar).varSetElems.fst) rhs
+ $$ (ppr.filter (not.isTyCoVar).varSetElems.fst) rhs
$$ pprCoreExpr (deAnnotate rhs)
$$ char ' '
))) False
-- \fv1..fvn x1..xn -> e
-- i.e. the fvs come first
- szsw_args = map idSizeW all_args
+ szsw_args = map (fromIntegral . idSizeW) all_args
szw_args = sum szsw_args
- p_init = listToFM (zip all_args (mkStackOffsets 0 szsw_args))
+ p_init = Map.fromList (zip all_args (mkStackOffsets 0 szsw_args))
-- make the arg bitmap
bits = argBits (reverse (map idCgRep all_args))
- bitmap_size = length bits
+ bitmap_size = genericLength bits
bitmap = mkBitmap bits
in do
body_code <- schemeER_wrk szw_args p_init body
arity bitmap_size bitmap False{-not alts-})
-- introduce break instructions for ticked expressions
-schemeER_wrk :: Int -> BCEnv -> AnnExpr' Id VarSet -> BcM BCInstrList
+schemeER_wrk :: Word16 -> BCEnv -> AnnExpr' Id VarSet -> BcM BCInstrList
schemeER_wrk d p rhs
| Just (tickInfo, (_annot, newRhs)) <- isTickedExp' rhs = do
code <- schemeE d 0 p newRhs
arr <- getBreakArray
- let idOffSets = getVarOffSets d p tickInfo
+ let idOffSets = getVarOffSets (fromIntegral d) p tickInfo
let tickNumber = tickInfo_number tickInfo
let breakInfo = BreakInfo
{ breakInfo_module = tickInfo_module tickInfo
, breakInfo_vars = idOffSets
, breakInfo_resty = exprType (deAnnotate' newRhs)
}
- let breakInstr = case arr of (BA arr#) -> BRK_FUN arr# tickNumber breakInfo
+ let breakInstr = case arr of
+ BA arr# ->
+ BRK_FUN arr# (fromIntegral tickNumber) breakInfo
return $ breakInstr `consOL` code
| otherwise = schemeE d 0 p rhs
-getVarOffSets :: Int -> BCEnv -> TickInfo -> [(Id, Int)]
+getVarOffSets :: Word16 -> BCEnv -> TickInfo -> [(Id, Word16)]
getVarOffSets d p = catMaybes . map (getOffSet d p) . tickInfo_locals
-getOffSet :: Int -> BCEnv -> Id -> Maybe (Id, Int)
+getOffSet :: Word16 -> BCEnv -> Id -> Maybe (Id, Word16)
getOffSet d env id
- = case lookupBCEnv_maybe env id of
+ = case lookupBCEnv_maybe id env of
Nothing -> Nothing
Just offset -> Just (id, d - offset)
-- it, have to agree about this layout
fvsToEnv p fvs = [v | v <- varSetElems fvs,
isId v, -- Could be a type variable
- v `elemFM` p]
+ v `Map.member` p]
-- -----------------------------------------------------------------------------
-- schemeE
-- Compile code to apply the given expression to the remaining args
-- on the stack, returning a HNF.
-schemeE :: Int -> Sequel -> BCEnv -> AnnExpr' Id VarSet -> BcM BCInstrList
+schemeE :: Word16 -> Sequel -> BCEnv -> AnnExpr' Id VarSet -> BcM BCInstrList
schemeE d s p e
| Just e' <- bcView e
-- Heave it on the stack, SLIDE, and RETURN.
(push, szw) <- pushAtom d p (AnnVar v)
return (push -- value onto stack
- `appOL` mkSLIDE szw (d-s) -- clear to sequel
+ `appOL` mkSLIDE szw (d-s) -- clear to sequel
`snocOL` RETURN_UBX v_rep) -- go
where
v_type = idType v
-- saturatred constructor application.
-- Just allocate the constructor and carry on
alloc_code <- mkConAppCode d s p data_con args_r_to_l
- body_code <- schemeE (d+1) s (addToFM p x d) body
+ body_code <- schemeE (d+1) s (Map.insert x d p) body
return (alloc_code `appOL` body_code)
-- General case for let. Generates correct, if inefficient, code in
schemeE d s p (AnnLet binds (_,body))
= let (xs,rhss) = case binds of AnnNonRec x rhs -> ([x],[rhs])
AnnRec xs_n_rhss -> unzip xs_n_rhss
- n_binds = length xs
+ n_binds = genericLength xs
fvss = map (fvsToEnv p' . fst) rhss
-- Sizes of free vars
- sizes = map (\rhs_fvs -> sum (map idSizeW rhs_fvs)) fvss
+ sizes = map (\rhs_fvs -> sum (map (fromIntegral . idSizeW) rhs_fvs)) fvss
-- the arity of each rhs
- arities = map (length . fst . collect) rhss
+ arities = map (genericLength . fst . collect) rhss
-- This p', d' defn is safe because all the items being pushed
-- are ptrs, so all have size 1. d' and p' reflect the stack
-- after the closures have been allocated in the heap (but not
-- filled in), and pointers to them parked on the stack.
- p' = addListToFM p (zipE xs (mkStackOffsets d (nOfThem n_binds 1)))
+ p' = Map.insertList (zipE xs (mkStackOffsets d (genericReplicate n_binds 1))) p
d' = d + n_binds
zipE = zipEqual "schemeE"
-- 4. Otherwise, it must be a function call. Push the args
-- right to left, SLIDE and ENTER.
-schemeT :: Int -- Stack depth
+schemeT :: Word16 -- Stack depth
-> Sequel -- Sequel depth
-> BCEnv -- stack env
-> AnnExpr' Id VarSet
-- Generate code to build a constructor application,
-- leaving it on top of the stack
-mkConAppCode :: Int -> Sequel -> BCEnv
+mkConAppCode :: Word16 -> Sequel -> BCEnv
-> DataCon -- The data constructor
-> [AnnExpr' Id VarSet] -- Args, in *reverse* order
-> BcM BCInstrList
-- returned, even if it is a pointed type. We always just return.
unboxedTupleReturn
- :: Int -> Sequel -> BCEnv
+ :: Word16 -> Sequel -> BCEnv
-> AnnExpr' Id VarSet -> BcM BCInstrList
unboxedTupleReturn d s p arg = do
(push, sz) <- pushAtom d p arg
-- Generate code for a tail-call
doTailCall
- :: Int -> Sequel -> BCEnv
+ :: Word16 -> Sequel -> BCEnv
-> Id -> [AnnExpr' Id VarSet]
-> BcM BCInstrList
doTailCall init_d s p fn args
-- -----------------------------------------------------------------------------
-- Case expressions
-doCase :: Int -> Sequel -> BCEnv
+doCase :: Word16 -> Sequel -> BCEnv
-> AnnExpr Id VarSet -> Id -> [AnnAlt Id VarSet]
-> Bool -- True <=> is an unboxed tuple case, don't enter the result
-> BcM BCInstrList
| otherwise = 1
-- depth of stack after the return value has been pushed
- d_bndr = d + ret_frame_sizeW + idSizeW bndr
+ d_bndr = d + ret_frame_sizeW + fromIntegral (idSizeW bndr)
-- depth of stack after the extra info table for an unboxed return
-- has been pushed, if any. This is the stack depth at the
-- Env in which to compile the alts, not including
-- any vars bound by the alts themselves
- p_alts = addToFM p bndr (d_bndr - 1)
+ p_alts = Map.insert bndr (d_bndr - 1) p
bndr_ty = idType bndr
isAlgCase = not (isUnLiftedType bndr_ty) && not is_unboxed_tuple
| otherwise =
let
(ptrs,nptrs) = partition (isFollowableArg.idCgRep) real_bndrs
- ptr_sizes = map idSizeW ptrs
- nptrs_sizes = map idSizeW nptrs
+ ptr_sizes = map (fromIntegral . idSizeW) ptrs
+ nptrs_sizes = map (fromIntegral . idSizeW) nptrs
bind_sizes = ptr_sizes ++ nptrs_sizes
size = sum ptr_sizes + sum nptrs_sizes
-- the UNPACK instruction unpacks in reverse order...
- p' = addListToFM p_alts
+ p' = Map.insertList
(zip (reverse (ptrs ++ nptrs))
(mkStackOffsets d_alts (reverse bind_sizes)))
+ p_alts
in do
MASSERT(isAlgCase)
rhs_code <- schemeE (d_alts+size) s p' rhs
return (my_discr alt, unitOL (UNPACK size) `appOL` rhs_code)
where
- real_bndrs = filter (not.isTyVar) bndrs
+ real_bndrs = filter (not.isTyCoVar) bndrs
my_discr (DEFAULT, _, _) = NoDiscr {-shouldn't really happen-}
my_discr (DataAlt dc, _, _)
| isUnboxedTupleCon dc
= unboxedTupleException
| otherwise
- = DiscrP (dataConTag dc - fIRST_TAG)
+ = DiscrP (fromIntegral (dataConTag dc - fIRST_TAG))
my_discr (LitAlt l, _, _)
= case l of MachInt i -> DiscrI (fromInteger i)
+ MachWord w -> DiscrW (fromInteger w)
MachFloat r -> DiscrF (fromRational r)
MachDouble r -> DiscrD (fromRational r)
MachChar i -> DiscrI (ord i)
-- case-of-case expressions, which is the only time we can be compiling a
-- case expression with s /= 0.
bitmap_size = d-s
- bitmap = intsToReverseBitmap bitmap_size{-size-}
- (sortLe (<=) (filter (< bitmap_size) rel_slots))
+ bitmap_size' :: Int
+ bitmap_size' = fromIntegral bitmap_size
+ bitmap = intsToReverseBitmap bitmap_size'{-size-}
+ (sortLe (<=) (filter (< bitmap_size') rel_slots))
where
- binds = fmToList p
- rel_slots = concat (map spread binds)
+ binds = Map.toList p
+ rel_slots = map fromIntegral $ concat (map spread binds)
spread (id, offset)
| isFollowableArg (idCgRep id) = [ rel_offset ]
| otherwise = []
-- (machine) code for the ccall, and create bytecodes to call that and
-- then return in the right way.
-generateCCall :: Int -> Sequel -- stack and sequel depths
+generateCCall :: Word16 -> Sequel -- stack and sequel depths
-> BCEnv
-> CCallSpec -- where to call
-> Id -- of target, for type info
-> [AnnExpr' Id VarSet] -- args (atoms)
-> BcM BCInstrList
-generateCCall d0 s p (CCallSpec target cconv _) fn args_r_to_l
+generateCCall d0 s p (CCallSpec target cconv safety) fn args_r_to_l
= let
-- useful constants
- addr_sizeW = cgRepSizeW NonPtrArg
+ addr_sizeW :: Word16
+ addr_sizeW = fromIntegral (cgRepSizeW NonPtrArg)
-- Get the args on the stack, with tags and suitably
-- dereferenced for the CCall. For each arg, return the
Just (t, _)
| t == arrayPrimTyCon || t == mutableArrayPrimTyCon
-> do rest <- pargs (d + addr_sizeW) az
- code <- parg_ArrayishRep arrPtrsHdrSize d p a
+ code <- parg_ArrayishRep (fromIntegral arrPtrsHdrSize) d p a
return ((code,AddrRep):rest)
| t == byteArrayPrimTyCon || t == mutableByteArrayPrimTyCon
-> do rest <- pargs (d + addr_sizeW) az
- code <- parg_ArrayishRep arrWordsHdrSize d p a
+ code <- parg_ArrayishRep (fromIntegral arrWordsHdrSize) d p a
return ((code,AddrRep):rest)
-- Default case: push taggedly, but otherwise intact.
-- Do magic for Ptr/Byte arrays. Push a ptr to the array on
-- the stack but then advance it over the headers, so as to
-- point to the payload.
+ parg_ArrayishRep :: Word16 -> Word16 -> BCEnv -> AnnExpr' Id VarSet
+ -> BcM BCInstrList
parg_ArrayishRep hdrSize d p a
= do (push_fo, _) <- pushAtom d p a
-- The ptr points at the header. Advance it over the
code_n_reps <- pargs d0 args_r_to_l
let
(pushs_arg, a_reps_pushed_r_to_l) = unzip code_n_reps
- a_reps_sizeW = sum (map primRepSizeW a_reps_pushed_r_to_l)
+ a_reps_sizeW = fromIntegral (sum (map primRepSizeW a_reps_pushed_r_to_l))
push_args = concatOL pushs_arg
d_after_args = d0 + a_reps_sizeW
= case target of
DynamicTarget
-> return (False, panic "ByteCodeGen.generateCCall(dyn)")
- StaticTarget target
+
+ StaticTarget target _
-> do res <- ioToBc (lookupStaticPtr stdcall_adj_target)
return (True, res)
where
stdcall_adj_target
#ifdef mingw32_TARGET_OS
| StdCallConv <- cconv
- = let size = a_reps_sizeW * wORD_SIZE in
+ = let size = fromIntegral a_reps_sizeW * wORD_SIZE in
mkFastString (unpackFS target ++ '@':show size)
#endif
| otherwise
-- Push the return placeholder. For a call returning nothing,
-- this is a VoidArg (tag).
- r_sizeW = primRepSizeW r_rep
+ r_sizeW = fromIntegral (primRepSizeW r_rep)
d_after_r = d_after_Addr + r_sizeW
r_lit = mkDummyLiteral r_rep
push_r = (if returns_void
recordItblMallocBc (ItblPtr (castFunPtrToPtr addr_of_marshaller))
let
-- do the call
- do_call = unitOL (CCALL stk_offset (castFunPtrToPtr addr_of_marshaller))
+ do_call = unitOL (CCALL stk_offset (castFunPtrToPtr addr_of_marshaller)
+ (fromIntegral (fromEnum (playInterruptible safety))))
-- slide and return
wrapup = mkSLIDE r_sizeW (d_after_r - r_sizeW - s)
`snocOL` RETURN_UBX (primRepToCgRep r_rep)
-- if it was, it would be impossible
-- to create a valid return value
-- placeholder on the stack
+
+ blargh :: a -- Used at more than one type
blargh = pprPanic "maybe_getCCallReturn: can't handle:"
(pprType fn_ty)
in
implement_tagToId :: [Name] -> BcM BCInstrList
implement_tagToId names
= ASSERT( notNull names )
- do labels <- getLabelsBc (length names)
+ do labels <- getLabelsBc (genericLength names)
label_fail <- getLabelBc
label_exit <- getLabelBc
let infos = zip4 labels (tail labels ++ [label_fail])
-- to 5 and not to 4. Stack locations are numbered from zero, so a
-- depth 6 stack has valid words 0 .. 5.
-pushAtom :: Int -> BCEnv -> AnnExpr' Id VarSet -> BcM (BCInstrList, Int)
+pushAtom :: Word16 -> BCEnv -> AnnExpr' Id VarSet -> BcM (BCInstrList, Word16)
pushAtom d p e
| Just e' <- bcView e
| Just primop <- isPrimOpId_maybe v
= return (unitOL (PUSH_PRIMOP primop), 1)
- | Just d_v <- lookupBCEnv_maybe p v -- v is a local variable
- = return (toOL (nOfThem sz (PUSH_L (d-d_v+sz-2))), sz)
+ | Just d_v <- lookupBCEnv_maybe v p -- v is a local variable
+ = let l = d - d_v + sz - 2
+ in return (toOL (genericReplicate sz (PUSH_L l)), sz)
-- d - d_v the number of words between the TOS
-- and the 1st slot of the object
--
return (unitOL (PUSH_G (getName v)), sz)
where
- sz = idSizeW v
+ sz :: Word16
+ sz = fromIntegral (idSizeW v)
pushAtom _ _ (AnnLit lit)
l -> pprPanic "pushAtom" (ppr l)
where
code rep
- = let size_host_words = cgRepSizeW rep
+ = let size_host_words = fromIntegral (cgRepSizeW rep)
in return (unitOL (PUSH_UBX (Left lit) size_host_words),
size_host_words)
= return (snd val)
| otherwise
= do label_neq <- getLabelBc
- return (mkTestEQ (fst val) label_neq
+ return (testEQ (fst val) label_neq
`consOL` (snd val
`appOL` unitOL (LABEL label_neq)
`appOL` the_default))
label_geq <- getLabelBc
code_lo <- mkTree vals_lo range_lo (dec v_mid)
code_hi <- mkTree vals_hi v_mid range_hi
- return (mkTestLT v_mid label_geq
+ return (testLT v_mid label_geq
`consOL` (code_lo
`appOL` unitOL (LABEL label_geq)
`appOL` code_hi))
[(_, def)] -> def
_ -> panic "mkMultiBranch/the_default"
+ testLT (DiscrI i) fail_label = TESTLT_I i fail_label
+ testLT (DiscrW i) fail_label = TESTLT_W i fail_label
+ testLT (DiscrF i) fail_label = TESTLT_F i fail_label
+ testLT (DiscrD i) fail_label = TESTLT_D i fail_label
+ testLT (DiscrP i) fail_label = TESTLT_P i fail_label
+ testLT NoDiscr _ = panic "mkMultiBranch NoDiscr"
+
+ testEQ (DiscrI i) fail_label = TESTEQ_I i fail_label
+ testEQ (DiscrW i) fail_label = TESTEQ_W i fail_label
+ testEQ (DiscrF i) fail_label = TESTEQ_F i fail_label
+ testEQ (DiscrD i) fail_label = TESTEQ_D i fail_label
+ testEQ (DiscrP i) fail_label = TESTEQ_P i fail_label
+ testEQ NoDiscr _ = panic "mkMultiBranch NoDiscr"
+
-- None of these will be needed if there are no non-default alts
- (mkTestLT, mkTestEQ, init_lo, init_hi)
+ (init_lo, init_hi)
| null notd_ways
= panic "mkMultiBranch: awesome foursome"
| otherwise
- = case fst (head notd_ways) of {
- DiscrI _ -> ( \(DiscrI i) fail_label -> TESTLT_I i fail_label,
- \(DiscrI i) fail_label -> TESTEQ_I i fail_label,
- DiscrI minBound,
- DiscrI maxBound );
- DiscrF _ -> ( \(DiscrF f) fail_label -> TESTLT_F f fail_label,
- \(DiscrF f) fail_label -> TESTEQ_F f fail_label,
- DiscrF minF,
- DiscrF maxF );
- DiscrD _ -> ( \(DiscrD d) fail_label -> TESTLT_D d fail_label,
- \(DiscrD d) fail_label -> TESTEQ_D d fail_label,
- DiscrD minD,
- DiscrD maxD );
- DiscrP _ -> ( \(DiscrP i) fail_label -> TESTLT_P i fail_label,
- \(DiscrP i) fail_label -> TESTEQ_P i fail_label,
- DiscrP algMinBound,
- DiscrP algMaxBound );
- NoDiscr -> panic "mkMultiBranch NoDiscr"
- }
+ = case fst (head notd_ways) of
+ DiscrI _ -> ( DiscrI minBound, DiscrI maxBound )
+ DiscrW _ -> ( DiscrW minBound, DiscrW maxBound )
+ DiscrF _ -> ( DiscrF minF, DiscrF maxF )
+ DiscrD _ -> ( DiscrD minD, DiscrD maxD )
+ DiscrP _ -> ( DiscrP algMinBound, DiscrP algMaxBound )
+ NoDiscr -> panic "mkMultiBranch NoDiscr"
(algMinBound, algMaxBound)
= case maybe_ncons of
- Just n -> (0, n - 1)
+ -- XXX What happens when n == 0?
+ Just n -> (0, fromIntegral n - 1)
Nothing -> (minBound, maxBound)
(DiscrI i1) `eqAlt` (DiscrI i2) = i1 == i2
+ (DiscrW w1) `eqAlt` (DiscrW w2) = w1 == w2
(DiscrF f1) `eqAlt` (DiscrF f2) = f1 == f2
(DiscrD d1) `eqAlt` (DiscrD d2) = d1 == d2
(DiscrP i1) `eqAlt` (DiscrP i2) = i1 == i2
_ `eqAlt` _ = False
(DiscrI i1) `leAlt` (DiscrI i2) = i1 <= i2
+ (DiscrW w1) `leAlt` (DiscrW w2) = w1 <= w2
(DiscrF f1) `leAlt` (DiscrF f2) = f1 <= f2
(DiscrD d1) `leAlt` (DiscrD d2) = d1 <= d2
(DiscrP i1) `leAlt` (DiscrP i2) = i1 <= i2
isNoDiscr _ = False
dec (DiscrI i) = DiscrI (i-1)
+ dec (DiscrW w) = DiscrW (w-1)
dec (DiscrP i) = DiscrP (i-1)
dec other = other -- not really right, but if you
-- do cases on floating values, you'll get what you deserve
-- Describes case alts
data Discr
= DiscrI Int
+ | DiscrW Word
| DiscrF Float
| DiscrD Double
- | DiscrP Int
+ | DiscrP Word16
| NoDiscr
instance Outputable Discr where
ppr (DiscrI i) = int i
+ ppr (DiscrW w) = text (show w)
ppr (DiscrF f) = text (show f)
ppr (DiscrD d) = text (show d)
- ppr (DiscrP i) = int i
+ ppr (DiscrP i) = ppr i
ppr NoDiscr = text "DEF"
-lookupBCEnv_maybe :: BCEnv -> Id -> Maybe Int
-lookupBCEnv_maybe = lookupFM
+lookupBCEnv_maybe :: Id -> BCEnv -> Maybe Word16
+lookupBCEnv_maybe = Map.lookup
idSizeW :: Id -> Int
idSizeW id = cgRepSizeW (typeCgRep (idType id))
" Workaround: use -fobject-code, or compile this module to .o separately."))
-mkSLIDE :: Int -> Int -> OrdList BCInstr
+mkSLIDE :: Word16 -> Word16 -> OrdList BCInstr
mkSLIDE n d = if d == 0 then nilOL else unitOL (SLIDE n d)
splitApp :: AnnExpr' Var ann -> (AnnExpr' Var ann, [AnnExpr' Var ann])
-- whereas value lambdas cannot; that is why they are nuked here
bcView (AnnNote _ (_,e)) = Just e
bcView (AnnCast (_,e) _) = Just e
-bcView (AnnLam v (_,e)) | isTyVar v = Just e
+bcView (AnnLam v (_,e)) | isTyCoVar v = Just e
bcView (AnnApp (_,e) (_, AnnType _)) = Just e
bcView _ = Nothing
-- Let szsw be the sizes in words of some items pushed onto the stack,
-- which has initial depth d'. Return the values which the stack environment
-- should map these items to.
-mkStackOffsets :: Int -> [Int] -> [Int]
+mkStackOffsets :: Word16 -> [Word16] -> [Word16]
mkStackOffsets original_depth szsw
= map (subtract 1) (tail (scanl (+) original_depth szsw))
data BcM_State
= BcM_State {
uniqSupply :: UniqSupply, -- for generating fresh variable names
- nextlabel :: Int, -- for generating local labels
+ nextlabel :: Word16, -- for generating local labels
malloced :: [BcPtr], -- thunks malloced for current BCO
-- Should be free()d when it is GCd
breakArray :: BreakArray -- array of breakpoint flags
recordItblMallocBc a
= BcM $ \st -> return (st{malloced = Left a : malloced st}, ())
-getLabelBc :: BcM Int
+getLabelBc :: BcM Word16
getLabelBc
- = BcM $ \st -> return (st{nextlabel = 1 + nextlabel st}, nextlabel st)
+ = BcM $ \st -> do let nl = nextlabel st
+ when (nl == maxBound) $
+ panic "getLabelBc: Ran out of labels"
+ return (st{nextlabel = nl + 1}, nl)
-getLabelsBc :: Int -> BcM [Int]
+getLabelsBc :: Word16 -> BcM [Word16]
getLabelsBc n
= BcM $ \st -> let ctr = nextlabel st
in return (st{nextlabel = ctr+n}, [ctr .. ctr+n-1])
projects / ghc-hetmet.git / blobdiff