-----------------------------------------------------------------------------
--
--- (c) The University of Glasgow, 2004
+-- (c) The University of Glasgow, 2004-2006
--
-- Parser for concrete Cmm.
--
import CgTicky
import CgInfoTbls
import CgForeignCall
-import CgTailCall ( pushUnboxedTuple )
-import CgStackery ( emitPushUpdateFrame )
-import ClosureInfo ( C_SRT(..) )
-import CgCallConv ( smallLiveness )
-import CgClosure ( emitBlackHoleCode )
-import CostCentre ( dontCareCCS )
+import CgTailCall
+import CgStackery
+import ClosureInfo
+import CgCallConv
+import CgClosure
+import CostCentre
import Cmm
import PprCmm
-import CmmUtils ( mkIntCLit )
+import CmmUtils
import CmmLex
import CLabel
import MachOp
-import SMRep ( fixedHdrSize, CgRep(..) )
+import SMRep
import Lexer
-import ForeignCall ( CCallConv(..), Safety(..) )
-import Literal ( mkMachInt )
+import ForeignCall
+import Literal
import Unique
import UniqFM
import SrcLoc
-import DynFlags ( DynFlags, DynFlag(..) )
-import Packages ( HomeModules )
-import StaticFlags ( opt_SccProfilingOn )
-import ErrUtils ( printError, dumpIfSet_dyn, showPass )
-import StringBuffer ( hGetStringBuffer )
+import DynFlags
+import StaticFlags
+import ErrUtils
+import StringBuffer
import FastString
-import Panic ( panic )
-import Constants ( wORD_SIZE )
+import Panic
+import Constants
import Outputable
-import Monad ( when )
+import Control.Monad
import Data.Char ( ord )
+import System.Exit
#include "HsVersions.h"
}
'if' { L _ (CmmT_if) }
'jump' { L _ (CmmT_jump) }
'foreign' { L _ (CmmT_foreign) }
+ 'prim' { L _ (CmmT_prim) }
+ 'return' { L _ (CmmT_return) }
'import' { L _ (CmmT_import) }
'switch' { L _ (CmmT_switch) }
'case' { L _ (CmmT_case) }
| ',' expr lits { $2 : $3 }
cmmproc :: { ExtCode }
- : info '{' body '}'
- { do (info_lbl, info1, info2) <- $1;
- stmts <- getCgStmtsEC (loopDecls $3)
- blks <- code (cgStmtsToBlocks stmts)
- code (emitInfoTableAndCode info_lbl info1 info2 [] blks) }
-
- | info ';'
- { do (info_lbl, info1, info2) <- $1;
- code (emitInfoTableAndCode info_lbl info1 info2 [] []) }
-
- | NAME '{' body '}'
- { do stmts <- getCgStmtsEC (loopDecls $3);
+-- TODO: add real SRT/info tables to parsed Cmm
+ : info maybe_formals maybe_frame maybe_gc_block '{' body '}'
+ { do ((info_lbl, info, live, formals, frame, gc_block), stmts) <-
+ getCgStmtsEC' $ loopDecls $ do {
+ (info_lbl, info, live) <- $1;
+ formals <- sequence $2;
+ frame <- $3;
+ gc_block <- $4;
+ $6;
+ return (info_lbl, info, live, formals, frame, gc_block) }
blks <- code (cgStmtsToBlocks stmts)
- code (emitProc [] (mkRtsCodeLabelFS $1) [] blks) }
-
-info :: { ExtFCode (CLabel, [CmmLit],[CmmLit]) }
+ code (emitInfoTableAndCode info_lbl (CmmInfo gc_block frame info) formals blks) }
+
+ | info maybe_formals ';'
+ { do (info_lbl, info, live) <- $1;
+ formals <- sequence $2;
+ code (emitInfoTableAndCode info_lbl (CmmInfo Nothing Nothing info) formals []) }
+
+ | NAME maybe_formals maybe_frame maybe_gc_block '{' body '}'
+ { do ((formals, frame, gc_block), stmts) <-
+ getCgStmtsEC' $ loopDecls $ do {
+ formals <- sequence $2;
+ frame <- $3;
+ gc_block <- $4;
+ $6;
+ return (formals, frame, gc_block) }
+ blks <- code (cgStmtsToBlocks stmts)
+ code (emitProc (CmmInfo gc_block frame CmmNonInfoTable) (mkRtsCodeLabelFS $1) formals blks) }
+
+info :: { ExtFCode (CLabel, CmmInfoTable, [Maybe LocalReg]) }
: 'INFO_TABLE' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, closure type, description, type
- { stdInfo $3 $5 $7 0 $9 $11 $13 }
+ { do prof <- profilingInfo $11 $13
+ return (mkRtsInfoLabelFS $3,
+ CmmInfoTable prof (fromIntegral $9)
+ (ThunkInfo (fromIntegral $5, fromIntegral $7) NoC_SRT),
+ []) }
| 'INFO_TABLE_FUN' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ',' INT ')'
-- ptrs, nptrs, closure type, description, type, fun type
- { funInfo $3 $5 $7 $9 $11 $13 $15 }
+ { do prof <- profilingInfo $11 $13
+ return (mkRtsInfoLabelFS $3,
+ CmmInfoTable prof (fromIntegral $9)
+ (FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT (fromIntegral $15) 0
+ (ArgSpec 0)
+ zeroCLit),
+ []) }
+ -- we leave most of the fields zero here. This is only used
+ -- to generate the BCO info table in the RTS at the moment.
| 'INFO_TABLE_CONSTR' '(' NAME ',' INT ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, tag, closure type, description, type
- { stdInfo $3 $5 $7 $9 $11 $13 $15 }
+ { do prof <- profilingInfo $13 $15
+ -- If profiling is on, this string gets duplicated,
+ -- but that's the way the old code did it we can fix it some other time.
+ desc_lit <- code $ mkStringCLit $13
+ return (mkRtsInfoLabelFS $3,
+ CmmInfoTable prof (fromIntegral $11)
+ (ConstrInfo (fromIntegral $5, fromIntegral $7) (fromIntegral $9) desc_lit),
+ []) }
| 'INFO_TABLE_SELECTOR' '(' NAME ',' INT ',' INT ',' STRING ',' STRING ')'
-- selector, closure type, description, type
- { basicInfo $3 (mkIntCLit (fromIntegral $5)) 0 $7 $9 $11 }
-
- | 'INFO_TABLE_RET' '(' NAME ',' INT ',' INT ',' INT maybe_vec ')'
- { retInfo $3 $5 $7 $9 $10 }
-
-maybe_vec :: { [CmmLit] }
- : {- empty -} { [] }
- | ',' NAME maybe_vec { CmmLabel (mkRtsCodeLabelFS $2) : $3 }
+ { do prof <- profilingInfo $9 $11
+ return (mkRtsInfoLabelFS $3,
+ CmmInfoTable prof (fromIntegral $7)
+ (ThunkSelectorInfo (fromIntegral $5) NoC_SRT),
+ []) }
+
+ | 'INFO_TABLE_RET' '(' NAME ',' INT ')'
+ -- closure type (no live regs)
+ { return (mkRtsInfoLabelFS $3,
+ CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
+ (ContInfo [] NoC_SRT),
+ []) }
+
+ | 'INFO_TABLE_RET' '(' NAME ',' INT ',' formals0 ')'
+ -- closure type, live regs
+ { do live <- sequence (map (liftM Just) $7)
+ return (mkRtsInfoLabelFS $3,
+ CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
+ (ContInfo live NoC_SRT),
+ live) }
body :: { ExtCode }
: {- empty -} { return () }
| stmt body { do $1; $2 }
decl :: { ExtCode }
- : type names ';' { mapM_ (newLocal $1) $2 }
+ : type names ';' { mapM_ (newLocal defaultKind $1) $2 }
+ | STRING type names ';' {% do k <- parseKind $1;
+ return $ mapM_ (newLocal k $2) $3 }
+
| 'import' names ';' { return () } -- ignore imports
| 'export' names ';' { return () } -- ignore exports
| NAME ':'
{ do l <- newLabel $1; code (labelC l) }
- | lreg '=' expr ';'
+ | lreg '=' expr ';'
{ do reg <- $1; e <- $3; stmtEC (CmmAssign reg e) }
| type '[' expr ']' '=' expr ';'
{ doStore $1 $3 $6 }
- | 'foreign' STRING expr '(' hint_exprs0 ')' vols ';'
- {% foreignCall $2 [] $3 $5 $7 }
- | lreg '=' 'foreign' STRING expr '(' hint_exprs0 ')' vols ';'
- {% let result = do r <- $1; return (r,NoHint) in
- foreignCall $4 [result] $5 $7 $9 }
- | STRING lreg '=' 'foreign' STRING expr '(' hint_exprs0 ')' vols ';'
- {% do h <- parseHint $1;
- let result = do r <- $2; return (r,h) in
- foreignCall $5 [result] $6 $8 $10 }
+
+ -- Gah! We really want to say "maybe_results" but that causes
+ -- a shift/reduce conflict with assignment. We either
+ -- we expand out the no-result and single result cases or
+ -- we tweak the syntax to avoid the conflict. The later
+ -- option is taken here because the other way would require
+ -- multiple levels of expanding and get unwieldy.
+ | maybe_results 'foreign' STRING expr '(' hint_exprs0 ')' safety vols ';'
+ {% foreignCall $3 $1 $4 $6 $9 $8 }
+ | maybe_results 'prim' '%' NAME '(' hint_exprs0 ')' safety vols ';'
+ {% primCall $1 $4 $6 $9 $8 }
-- stmt-level macros, stealing syntax from ordinary C-- function calls.
-- Perhaps we ought to use the %%-form?
| NAME '(' exprs0 ')' ';'
{ doSwitch $2 $3 $5 $6 }
| 'goto' NAME ';'
{ do l <- lookupLabel $2; stmtEC (CmmBranch l) }
- | 'jump' expr {-maybe_actuals-} ';'
- { do e <- $2; stmtEC (CmmJump e []) }
+ | 'jump' expr maybe_actuals ';'
+ { do e1 <- $2; e2 <- sequence $3; stmtEC (CmmJump e1 e2) }
+ | 'return' maybe_actuals ';'
+ { do e <- sequence $2; stmtEC (CmmReturn e) }
| 'if' bool_expr '{' body '}' else
{ ifThenElse $2 $4 $6 }
| '(' bool_op ')' { $2 }
-- This is not C-- syntax. What to do?
+safety :: { CmmSafety }
+ : {- empty -} { CmmUnsafe } -- Default may change soon
+ | STRING {% parseSafety $1 }
+
+-- This is not C-- syntax. What to do?
vols :: { Maybe [GlobalReg] }
: {- empty -} { Nothing }
| '[' ']' { Just [] }
: {- empty -} { wordRep }
| '::' type { $2 }
+maybe_actuals :: { [ExtFCode (CmmExpr, MachHint)] }
+ : {- empty -} { [] }
+ | '(' hint_exprs0 ')' { $2 }
+
hint_exprs0 :: { [ExtFCode (CmmExpr, MachHint)] }
: {- empty -} { [] }
| hint_exprs { $1 }
: NAME { lookupName $1 }
| GLOBALREG { return (CmmReg (CmmGlobal $1)) }
+maybe_results :: { [ExtFCode (CmmFormal, MachHint)] }
+ : {- empty -} { [] }
+ | '(' hint_lregs ')' '=' { $2 }
+
+hint_lregs :: { [ExtFCode (CmmFormal, MachHint)] }
+ : hint_lreg { [$1] }
+ | hint_lreg ',' { [$1] }
+ | hint_lreg ',' hint_lregs { $1 : $3 }
+
+hint_lreg :: { ExtFCode (CmmFormal, MachHint) }
+ : local_lreg { do e <- $1; return (e, inferHint (CmmReg (CmmLocal e))) }
+ | STRING local_lreg {% do h <- parseHint $1;
+ return $ do
+ e <- $2; return (e,h) }
+
+local_lreg :: { ExtFCode LocalReg }
+ : NAME { do e <- lookupName $1;
+ return $
+ case e of
+ CmmReg (CmmLocal r) -> r
+ other -> pprPanic "CmmParse:" (ftext $1 <> text " not a local register") }
+
lreg :: { ExtFCode CmmReg }
: NAME { do e <- lookupName $1;
return $
other -> pprPanic "CmmParse:" (ftext $1 <> text " not a register") }
| GLOBALREG { return (CmmGlobal $1) }
+maybe_formals :: { [ExtFCode LocalReg] }
+ : {- empty -} { [] }
+ | '(' formals0 ')' { $2 }
+
+formals0 :: { [ExtFCode LocalReg] }
+ : {- empty -} { [] }
+ | formals { $1 }
+
+formals :: { [ExtFCode LocalReg] }
+ : formal ',' { [$1] }
+ | formal { [$1] }
+ | formal ',' formals { $1 : $3 }
+
+formal :: { ExtFCode LocalReg }
+ : type NAME { newLocal defaultKind $1 $2 }
+ | STRING type NAME {% do k <- parseKind $1;
+ return $ newLocal k $2 $3 }
+
+maybe_frame :: { ExtFCode (Maybe UpdateFrame) }
+ : {- empty -} { return Nothing }
+ | 'jump' expr '(' exprs0 ')' { do { target <- $2;
+ args <- sequence $4;
+ return $ Just (UpdateFrame target args) } }
+
+maybe_gc_block :: { ExtFCode (Maybe BlockId) }
+ : {- empty -} { return Nothing }
+ | 'goto' NAME
+ { do l <- lookupLabel $2; return (Just l) }
+
type :: { MachRep }
: 'bits8' { I8 }
| typenot8 { $1 }
section "text" = Text
section "data" = Data
section "rodata" = ReadOnlyData
+section "relrodata" = RelocatableReadOnlyData
section "bss" = UninitialisedData
section s = OtherSection s
( FSLIT("GET_FUN_INFO"), \ [x] -> funInfoTable (closureInfoPtr x) ),
( FSLIT("INFO_TYPE"), \ [x] -> infoTableClosureType x ),
( FSLIT("INFO_PTRS"), \ [x] -> infoTablePtrs x ),
- ( FSLIT("INFO_NPTRS"), \ [x] -> infoTableNonPtrs x ),
- ( FSLIT("RET_VEC"), \ [info, conZ] -> retVec info conZ )
+ ( FSLIT("INFO_NPTRS"), \ [x] -> infoTableNonPtrs x )
]
-- we understand a subset of C-- primitives:
( "f2f32", flip MO_S_Conv F32 ), -- TODO; rounding mode
( "f2f64", flip MO_S_Conv F64 ), -- TODO; rounding mode
( "f2i8", flip MO_S_Conv I8 ),
- ( "f2i16", flip MO_S_Conv I8 ),
- ( "f2i32", flip MO_S_Conv I8 ),
- ( "f2i64", flip MO_S_Conv I8 ),
+ ( "f2i16", flip MO_S_Conv I16 ),
+ ( "f2i32", flip MO_S_Conv I32 ),
+ ( "f2i64", flip MO_S_Conv I64 ),
( "i2f32", flip MO_S_Conv F32 ),
( "i2f64", flip MO_S_Conv F64 )
]
+callishMachOps = listToUFM $
+ map (\(x, y) -> (mkFastString x, y)) [
+ ( "write_barrier", MO_WriteBarrier )
+ -- ToDo: the rest, maybe
+ ]
+
+parseSafety :: String -> P CmmSafety
+parseSafety "safe" = return (CmmSafe NoC_SRT)
+parseSafety "unsafe" = return CmmUnsafe
+parseSafety str = fail ("unrecognised safety: " ++ str)
+
parseHint :: String -> P MachHint
parseHint "ptr" = return PtrHint
parseHint "signed" = return SignedHint
parseHint "float" = return FloatHint
parseHint str = fail ("unrecognised hint: " ++ str)
+parseKind :: String -> P Kind
+parseKind "ptr" = return KindPtr
+parseKind str = fail ("unrecognized kin: " ++ str)
+
+defaultKind :: Kind
+defaultKind = KindNonPtr
+
-- labels are always pointers, so we might as well infer the hint
inferHint :: CmmExpr -> MachHint
inferHint (CmmLit (CmmLabel _)) = PtrHint
( FSLIT("RET_NN"), \[a,b] -> emitRetUT [(NonPtrArg,a),(NonPtrArg,b)]),
( FSLIT("RET_NP"), \[a,b] -> emitRetUT [(NonPtrArg,a),(PtrArg,b)]),
( FSLIT("RET_PPP"), \[a,b,c] -> emitRetUT [(PtrArg,a),(PtrArg,b),(PtrArg,c)]),
+ ( FSLIT("RET_NPP"), \[a,b,c] -> emitRetUT [(NonPtrArg,a),(PtrArg,b),(PtrArg,c)]),
( FSLIT("RET_NNP"), \[a,b,c] -> emitRetUT [(NonPtrArg,a),(NonPtrArg,b),(PtrArg,c)]),
( FSLIT("RET_NNNP"), \[a,b,c,d] -> emitRetUT [(NonPtrArg,a),(NonPtrArg,b),(NonPtrArg,c),(PtrArg,d)]),
( FSLIT("RET_NPNP"), \[a,b,c,d] -> emitRetUT [(NonPtrArg,a),(PtrArg,b),(NonPtrArg,c),(PtrArg,d)])
addLabel :: FastString -> BlockId -> ExtCode
addLabel name block_id = EC $ \e s -> return ((name, Label block_id):s, ())
-newLocal :: MachRep -> FastString -> ExtCode
-newLocal ty name = do
+newLocal :: Kind -> MachRep -> FastString -> ExtFCode LocalReg
+newLocal kind ty name = do
u <- code newUnique
- addVarDecl name (CmmReg (CmmLocal (LocalReg u ty)))
+ let reg = LocalReg u ty kind
+ addVarDecl name (CmmReg (CmmLocal reg))
+ return reg
newLabel :: FastString -> ExtFCode BlockId
newLabel name = do
stmtEC stmt = code (stmtC stmt)
stmtsEC stmts = code (stmtsC stmts)
getCgStmtsEC = code2 getCgStmts'
+getCgStmtsEC' = code2 (\m -> getCgStmts' m >>= f)
+ where f ((decl, b), c) = return ((decl, b), (b, c))
forkLabelledCodeEC ec = do
stmts <- getCgStmtsEC ec
code (forkCgStmts stmts)
-retInfo name size live_bits cl_type vector = do
- let liveness = smallLiveness (fromIntegral size) (fromIntegral live_bits)
- info_lbl = mkRtsRetInfoLabelFS name
- (info1,info2) = mkRetInfoTable info_lbl liveness NoC_SRT
- (fromIntegral cl_type) vector
- return (info_lbl, info1, info2)
-
-stdInfo name ptrs nptrs srt_bitmap cl_type desc_str ty_str =
- basicInfo name (packHalfWordsCLit ptrs nptrs)
- srt_bitmap cl_type desc_str ty_str
-basicInfo name layout srt_bitmap cl_type desc_str ty_str = do
+profilingInfo desc_str ty_str = do
lit1 <- if opt_SccProfilingOn
then code $ mkStringCLit desc_str
else return (mkIntCLit 0)
lit2 <- if opt_SccProfilingOn
then code $ mkStringCLit ty_str
else return (mkIntCLit 0)
- let info1 = mkStdInfoTable lit1 lit2 (fromIntegral cl_type)
- (fromIntegral srt_bitmap)
- layout
- return (mkRtsInfoLabelFS name, info1, [])
-
-funInfo name ptrs nptrs cl_type desc_str ty_str fun_type = do
- (label,info1,_) <- stdInfo name ptrs nptrs 0{-srt_bitmap-}
- cl_type desc_str ty_str
- let info2 = mkFunGenInfoExtraBits (fromIntegral fun_type) 0 zero zero zero
- -- we leave most of the fields zero here. This is only used
- -- to generate the BCO info table in the RTS at the moment.
- return (label,info1,info2)
- where
- zero = mkIntCLit 0
+ return (ProfilingInfo lit1 lit2)
staticClosure :: FastString -> FastString -> [CmmLit] -> ExtCode
foreignCall
:: String
- -> [ExtFCode (CmmReg,MachHint)]
+ -> [ExtFCode (CmmFormal,MachHint)]
-> ExtFCode CmmExpr
-> [ExtFCode (CmmExpr,MachHint)]
- -> Maybe [GlobalReg] -> P ExtCode
-foreignCall "C" results_code expr_code args_code vols
- = return $ do
- results <- sequence results_code
- expr <- expr_code
- args <- sequence args_code
- code (emitForeignCall' PlayRisky results
- (CmmForeignCall expr CCallConv) args vols)
-foreignCall conv _ _ _ _
- = fail ("unknown calling convention: " ++ conv)
+ -> Maybe [GlobalReg]
+ -> CmmSafety
+ -> P ExtCode
+foreignCall conv_string results_code expr_code args_code vols safety
+ = do convention <- case conv_string of
+ "C" -> return CCallConv
+ "C--" -> return CmmCallConv
+ _ -> fail ("unknown calling convention: " ++ conv_string)
+ return $ do
+ results <- sequence results_code
+ expr <- expr_code
+ args <- sequence args_code
+ --code (stmtC (CmmCall (CmmForeignCall expr convention) results args safety))
+ case convention of
+ -- Temporary hack so at least some functions are CmmSafe
+ CmmCallConv -> code (stmtC (CmmCall (CmmForeignCall expr convention) results args safety))
+ _ -> case safety of
+ CmmUnsafe ->
+ code (emitForeignCall' PlayRisky results
+ (CmmForeignCall expr convention) args vols NoC_SRT)
+ CmmSafe srt ->
+ code (emitForeignCall' (PlaySafe unused) results
+ (CmmForeignCall expr convention) args vols NoC_SRT) where
+ unused = panic "not used by emitForeignCall'"
+
+primCall
+ :: [ExtFCode (CmmFormal,MachHint)]
+ -> FastString
+ -> [ExtFCode (CmmExpr,MachHint)]
+ -> Maybe [GlobalReg]
+ -> CmmSafety
+ -> P ExtCode
+primCall results_code name args_code vols safety
+ = case lookupUFM callishMachOps name of
+ Nothing -> fail ("unknown primitive " ++ unpackFS name)
+ Just p -> return $ do
+ results <- sequence results_code
+ args <- sequence args_code
+ case safety of
+ CmmUnsafe ->
+ code (emitForeignCall' PlayRisky results
+ (CmmPrim p) args vols NoC_SRT)
+ CmmSafe srt ->
+ code (emitForeignCall' (PlaySafe unused) results
+ (CmmPrim p) args vols NoC_SRT) where
+ unused = panic "not used by emitForeignCall'"
doStore :: MachRep -> ExtFCode CmmExpr -> ExtFCode CmmExpr -> ExtCode
doStore rep addr_code val_code
emitStmts stmts
when (sp /= 0) $ stmtC (CmmAssign spReg (cmmRegOffW spReg (-sp)))
stmtC (CmmJump (entryCode (CmmLoad (cmmRegOffW spReg sp) wordRep)) [])
+ -- TODO (when using CPS): emitStmt (CmmReturn (map snd args))
-- -----------------------------------------------------------------------------
-- If-then-else and boolean expressions
Var (CmmLit (CmmInt (fromIntegral stdInfoTableSizeB) wordRep) ))
]
-parseCmmFile :: DynFlags -> HomeModules -> FilePath -> IO (Maybe Cmm)
-parseCmmFile dflags hmods filename = do
+parseCmmFile :: DynFlags -> FilePath -> IO (Maybe Cmm)
+parseCmmFile dflags filename = do
showPass dflags "ParseCmm"
buf <- hGetStringBuffer filename
let
-- in there we don't want.
case unP cmmParse init_state of
PFailed span err -> do printError span err; return Nothing
- POk _ code -> do
- cmm <- initC dflags hmods no_module (getCmm (unEC code initEnv [] >> return ()))
- dumpIfSet_dyn dflags Opt_D_dump_cmm "Cmm" (pprCmms [cmm])
+ POk pst code -> do
+ cmm <- initC dflags no_module (getCmm (unEC code initEnv [] >> return ()))
+ let ms = getMessages pst
+ printErrorsAndWarnings dflags ms
+ when (errorsFound dflags ms) $ exitWith (ExitFailure 1)
+ dumpIfSet_dyn dflags Opt_D_dump_cmm "Cmm" (pprCmms [cmm])
return (Just cmm)
where
no_module = panic "parseCmmFile: no module"