-----------------------------------------------------------------------------
{
+{-# 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 CmmParse ( parseCmmFile ) where
import CgMonad
import Outputable
import Control.Monad
+import Data.Array
import Data.Char ( ord )
import System.Exit
'if' { L _ (CmmT_if) }
'jump' { L _ (CmmT_jump) }
'foreign' { L _ (CmmT_foreign) }
+ 'never' { L _ (CmmT_never) }
'prim' { L _ (CmmT_prim) }
'return' { L _ (CmmT_return) }
+ 'returns' { L _ (CmmT_returns) }
'import' { L _ (CmmT_import) }
'switch' { L _ (CmmT_switch) }
'case' { L _ (CmmT_case) }
cmmproc :: { ExtCode }
-- 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) <-
+ : info maybe_formals_without_kinds maybe_gc_block maybe_frame '{' body '}'
+ { do ((entry_ret_label, info, live, formals, gc_block, frame), stmts) <-
getCgStmtsEC' $ loopDecls $ do {
- (info_lbl, info, live) <- $1;
+ (entry_ret_label, info, live) <- $1;
formals <- sequence $2;
- frame <- $3;
- gc_block <- $4;
+ gc_block <- $3;
+ frame <- $4;
$6;
- return (info_lbl, info, live, formals, frame, gc_block) }
+ return (entry_ret_label, info, live, formals, gc_block, frame) }
blks <- code (cgStmtsToBlocks stmts)
- code (emitInfoTableAndCode info_lbl (CmmInfo Nothing frame info) formals blks) }
+ code (emitInfoTableAndCode entry_ret_label (CmmInfo gc_block frame info) formals blks) }
- | info maybe_formals ';'
- { do (info_lbl, info, live) <- $1;
+ | info maybe_formals_without_kinds ';'
+ { do (entry_ret_label, info, live) <- $1;
formals <- sequence $2;
- code (emitInfoTableAndCode info_lbl (CmmInfo Nothing Nothing info) formals []) }
+ code (emitInfoTableAndCode entry_ret_label (CmmInfo Nothing Nothing info) formals []) }
- | NAME maybe_formals maybe_frame maybe_gc_block '{' body '}'
- { do ((formals, frame, gc_block), stmts) <-
+ | NAME maybe_formals_without_kinds maybe_gc_block maybe_frame '{' body '}'
+ { do ((formals, gc_block, frame), stmts) <-
getCgStmtsEC' $ loopDecls $ do {
formals <- sequence $2;
- frame <- $3;
- gc_block <- $4;
+ gc_block <- $3;
+ frame <- $4;
$6;
- return (formals, frame, gc_block) }
+ return (formals, gc_block, frame) }
blks <- code (cgStmtsToBlocks stmts)
code (emitProc (CmmInfo gc_block frame CmmNonInfoTable) (mkRtsCodeLabelFS $1) formals blks) }
: 'INFO_TABLE' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, closure type, description, type
{ do prof <- profilingInfo $11 $13
- return (mkRtsInfoLabelFS $3,
+ return (mkRtsEntryLabelFS $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
{ do prof <- profilingInfo $11 $13
- return (mkRtsInfoLabelFS $3,
+ return (mkRtsEntryLabelFS $3,
CmmInfoTable prof (fromIntegral $9)
(FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT (fromIntegral $15) 0
(ArgSpec 0)
[]) }
-- we leave most of the fields zero here. This is only used
-- to generate the BCO info table in the RTS at the moment.
+
+ -- A variant with a non-zero arity (needed to write Main_main in Cmm)
+ | 'INFO_TABLE_FUN' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ',' INT ',' INT ')'
+ -- ptrs, nptrs, closure type, description, type, fun type, arity
+ { do prof <- profilingInfo $11 $13
+ return (mkRtsEntryLabelFS $3,
+ CmmInfoTable prof (fromIntegral $9)
+ (FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT (fromIntegral $15) (fromIntegral $17)
+ (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
-- 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,
+ return (mkRtsEntryLabelFS $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
{ do prof <- profilingInfo $9 $11
- return (mkRtsInfoLabelFS $3,
+ return (mkRtsEntryLabelFS $3,
CmmInfoTable prof (fromIntegral $7)
(ThunkSelectorInfo (fromIntegral $5) NoC_SRT),
[]) }
| 'INFO_TABLE_RET' '(' NAME ',' INT ')'
-- closure type (no live regs)
- { return (mkRtsInfoLabelFS $3,
+ { do let infoLabel = mkRtsInfoLabelFS $3
+ return (mkRtsRetLabelFS $3,
CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
(ContInfo [] NoC_SRT),
[]) }
- | 'INFO_TABLE_RET' '(' NAME ',' INT ',' formals0 ')'
+ | 'INFO_TABLE_RET' '(' NAME ',' INT ',' formals_without_kinds0 ')'
-- closure type, live regs
{ do live <- sequence (map (liftM Just) $7)
- return (mkRtsInfoLabelFS $3,
+ return (mkRtsRetLabelFS $3,
CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
(ContInfo live NoC_SRT),
live) }
decl :: { ExtCode }
: type names ';' { mapM_ (newLocal defaultKind $1) $2 }
- | STRING type names ';' {% do k <- parseKind $1;
+ | STRING type names ';' {% do k <- parseGCKind $1;
return $ mapM_ (newLocal k $2) $3 }
- | 'import' names ';' { return () } -- ignore imports
+ | 'import' names ';' { mapM_ newImport $2 }
| 'export' names ';' { return () } -- ignore exports
names :: { [FastString] }
-- 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 ';'
+ | maybe_results 'foreign' STRING expr '(' cmm_kind_exprs0 ')' safety vols opt_never_returns ';'
+ {% foreignCall $3 $1 $4 $6 $9 $8 $10 }
+ | maybe_results 'prim' '%' NAME '(' cmm_kind_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?
| 'if' bool_expr '{' body '}' else
{ ifThenElse $2 $4 $6 }
+opt_never_returns :: { CmmReturnInfo }
+ : { CmmMayReturn }
+ | 'never' 'returns' { CmmNeverReturns }
+
bool_expr :: { ExtFCode BoolExpr }
: bool_op { $1 }
| expr { do e <- $1; return (BoolTest e) }
: {- empty -} { wordRep }
| '::' type { $2 }
-maybe_actuals :: { [ExtFCode (CmmExpr, MachHint)] }
+maybe_actuals :: { [ExtFCode CmmActual] }
: {- empty -} { [] }
- | '(' hint_exprs0 ')' { $2 }
+ | '(' cmm_kind_exprs0 ')' { $2 }
-hint_exprs0 :: { [ExtFCode (CmmExpr, MachHint)] }
+cmm_kind_exprs0 :: { [ExtFCode CmmActual] }
: {- empty -} { [] }
- | hint_exprs { $1 }
+ | cmm_kind_exprs { $1 }
-hint_exprs :: { [ExtFCode (CmmExpr, MachHint)] }
- : hint_expr { [$1] }
- | hint_expr ',' hint_exprs { $1 : $3 }
+cmm_kind_exprs :: { [ExtFCode CmmActual] }
+ : cmm_kind_expr { [$1] }
+ | cmm_kind_expr ',' cmm_kind_exprs { $1 : $3 }
-hint_expr :: { ExtFCode (CmmExpr, MachHint) }
- : expr { do e <- $1; return (e, inferHint e) }
- | expr STRING {% do h <- parseHint $2;
+cmm_kind_expr :: { ExtFCode CmmActual }
+ : expr { do e <- $1; return (e, inferCmmKind e) }
+ | expr STRING {% do h <- parseCmmKind $2;
return $ do
e <- $1; return (e,h) }
: NAME { lookupName $1 }
| GLOBALREG { return (CmmReg (CmmGlobal $1)) }
-maybe_results :: { [ExtFCode (CmmFormal, MachHint)] }
+maybe_results :: { [ExtFCode CmmFormal] }
: {- empty -} { [] }
- | '(' hint_lregs ')' '=' { $2 }
+ | '(' cmm_formals ')' '=' { $2 }
-hint_lregs :: { [ExtFCode (CmmFormal, MachHint)] }
- : hint_lreg { [$1] }
- | hint_lreg ',' { [$1] }
- | hint_lreg ',' hint_lregs { $1 : $3 }
+cmm_formals :: { [ExtFCode CmmFormal] }
+ : cmm_formal { [$1] }
+ | cmm_formal ',' { [$1] }
+ | cmm_formal ',' cmm_formals { $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;
+cmm_formal :: { ExtFCode CmmFormal }
+ : local_lreg { do e <- $1; return (e, inferCmmKind (CmmReg (CmmLocal e))) }
+ | STRING local_lreg {% do h <- parseCmmKind $1;
return $ do
e <- $2; return (e,h) }
other -> pprPanic "CmmParse:" (ftext $1 <> text " not a register") }
| GLOBALREG { return (CmmGlobal $1) }
-maybe_formals :: { [ExtFCode LocalReg] }
+maybe_formals_without_kinds :: { [ExtFCode LocalReg] }
: {- empty -} { [] }
- | '(' formals0 ')' { $2 }
+ | '(' formals_without_kinds0 ')' { $2 }
-formals0 :: { [ExtFCode LocalReg] }
+formals_without_kinds0 :: { [ExtFCode LocalReg] }
: {- empty -} { [] }
- | formals { $1 }
+ | formals_without_kinds { $1 }
-formals :: { [ExtFCode LocalReg] }
- : formal ',' { [$1] }
- | formal { [$1] }
- | formal ',' formals { $1 : $3 }
+formals_without_kinds :: { [ExtFCode LocalReg] }
+ : formal_without_kind ',' { [$1] }
+ | formal_without_kind { [$1] }
+ | formal_without_kind ',' formals_without_kinds { $1 : $3 }
-formal :: { ExtFCode LocalReg }
+formal_without_kind :: { ExtFCode LocalReg }
: type NAME { newLocal defaultKind $1 $2 }
- | STRING type NAME {% do k <- parseKind $1;
+ | STRING type NAME {% do k <- parseGCKind $1;
return $ newLocal k $2 $3 }
maybe_frame :: { ExtFCode (Maybe UpdateFrame) }
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)
+parseCmmKind :: String -> P CmmKind
+parseCmmKind "ptr" = return PtrHint
+parseCmmKind "signed" = return SignedHint
+parseCmmKind "float" = return FloatHint
+parseCmmKind str = fail ("unrecognised hint: " ++ str)
-parseKind :: String -> P Kind
-parseKind "ptr" = return KindPtr
-parseKind str = fail ("unrecognized kin: " ++ str)
+parseGCKind :: String -> P GCKind
+parseGCKind "ptr" = return GCKindPtr
+parseGCKind str = fail ("unrecognized kin: " ++ str)
-defaultKind :: Kind
-defaultKind = KindNonPtr
+defaultKind :: GCKind
+defaultKind = GCKindNonPtr
-- labels are always pointers, so we might as well infer the hint
-inferHint :: CmmExpr -> MachHint
-inferHint (CmmLit (CmmLabel _)) = PtrHint
-inferHint (CmmReg (CmmGlobal g)) | isPtrGlobalReg g = PtrHint
-inferHint _ = NoHint
+inferCmmKind :: CmmExpr -> CmmKind
+inferCmmKind (CmmLit (CmmLabel _)) = PtrHint
+inferCmmKind (CmmReg (CmmGlobal g)) | isPtrGlobalReg g = PtrHint
+inferCmmKind _ = NoHint
isPtrGlobalReg Sp = True
isPtrGlobalReg SpLim = True
-- an environment, which is looped back into the computation. In this
-- way, we can have embedded declarations that scope over the whole
-- procedure, and imports that scope over the entire module.
+-- Discards the local declaration contained within decl'
loopDecls :: ExtFCode a -> ExtFCode a
-loopDecls (EC fcode) =
- EC $ \e s -> fixC (\ ~(decls,a) -> fcode (addListToUFM e decls) [])
+loopDecls (EC fcode) =
+ EC $ \e globalDecls -> do
+ (decls', a) <- fixC (\ ~(decls,a) -> fcode (addListToUFM e (decls ++ globalDecls)) globalDecls)
+ return (globalDecls, a)
getEnv :: ExtFCode Env
getEnv = EC $ \e s -> return (s, e)
addLabel :: FastString -> BlockId -> ExtCode
addLabel name block_id = EC $ \e s -> return ((name, Label block_id):s, ())
-newLocal :: Kind -> MachRep -> FastString -> ExtFCode LocalReg
+newLocal :: GCKind -> MachRep -> FastString -> ExtFCode LocalReg
newLocal kind ty name = do
u <- code newUnique
let reg = LocalReg u ty kind
addVarDecl name (CmmReg (CmmLocal reg))
return reg
+-- Creates a foreign label in the import. CLabel's labelDynamic
+-- classifies these labels as dynamic, hence the code generator emits the
+-- PIC code for them.
+newImport :: FastString -> ExtFCode ()
+newImport name
+ = addVarDecl name (CmmLit (CmmLabel (mkForeignLabel name Nothing True)))
+
newLabel :: FastString -> ExtFCode BlockId
newLabel name = do
u <- code newUnique
foreignCall
:: String
- -> [ExtFCode (CmmFormal,MachHint)]
+ -> [ExtFCode CmmFormal]
-> ExtFCode CmmExpr
- -> [ExtFCode (CmmExpr,MachHint)]
+ -> [ExtFCode CmmActual]
-> Maybe [GlobalReg]
-> CmmSafety
+ -> CmmReturnInfo
-> P ExtCode
-foreignCall conv_string results_code expr_code args_code vols safety
+foreignCall conv_string results_code expr_code args_code vols safety ret
= do convention <- case conv_string of
"C" -> return CCallConv
+ "stdcall" -> return StdCallConv
"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))
+ --code (stmtC (CmmCall (CmmCallee 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
+ CmmCallConv -> code (stmtC (CmmCall (CmmCallee expr convention) results args safety ret))
+ _ ->
+ let expr' = adjCallTarget convention expr args in
+ case safety of
CmmUnsafe ->
code (emitForeignCall' PlayRisky results
- (CmmForeignCall expr convention) args vols NoC_SRT)
+ (CmmCallee expr' convention) args vols NoC_SRT ret)
CmmSafe srt ->
code (emitForeignCall' (PlaySafe unused) results
- (CmmForeignCall expr convention) args vols NoC_SRT) where
+ (CmmCallee expr' convention) args vols NoC_SRT ret) where
unused = panic "not used by emitForeignCall'"
+adjCallTarget :: CCallConv -> CmmExpr -> [(CmmExpr,MachHint)] -> CmmExpr
+#ifdef mingw32_TARGET_OS
+-- On Windows, we have to add the '@N' suffix to the label when making
+-- a call with the stdcall calling convention.
+adjCallTarget StdCallConv (CmmLit (CmmLabel lbl)) args
+ = CmmLit (CmmLabel (addLabelSize lbl (sum (map size args))))
+ where size (e,_) = max wORD_SIZE (machRepByteWidth (cmmExprRep e))
+ -- c.f. CgForeignCall.emitForeignCall
+#endif
+adjCallTarget _ expr _
+ = expr
+
primCall
- :: [ExtFCode (CmmFormal,MachHint)]
+ :: [ExtFCode CmmFormal]
-> FastString
- -> [ExtFCode (CmmExpr,MachHint)]
+ -> [ExtFCode CmmActual]
-> Maybe [GlobalReg]
-> CmmSafety
-> P ExtCode
case safety of
CmmUnsafe ->
code (emitForeignCall' PlayRisky results
- (CmmPrim p) args vols NoC_SRT)
+ (CmmPrim p) args vols NoC_SRT CmmMayReturn)
CmmSafe srt ->
code (emitForeignCall' (PlaySafe unused) results
- (CmmPrim p) args vols NoC_SRT) where
+ (CmmPrim p) args vols NoC_SRT CmmMayReturn) where
unused = panic "not used by emitForeignCall'"
doStore :: MachRep -> ExtFCode CmmExpr -> ExtFCode CmmExpr -> ExtCode
let ms = getMessages pst
printErrorsAndWarnings dflags ms
when (errorsFound dflags ms) $ exitWith (ExitFailure 1)
- dumpIfSet_dyn dflags Opt_D_dump_cmm "Cmm" (pprCmms [cmm])
+ dumpIfSet_dyn dflags Opt_D_dump_cmm "Cmm" (ppr cmm)
return (Just cmm)
where
no_module = panic "parseCmmFile: no module"
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