-- (c) The University of Glasgow, 2004-2006
--
-- Parser for concrete Cmm.
+-- This doesn't just parse the Cmm file, we also do some code generation
+-- along the way for switches and foreign calls etc.
--
-----------------------------------------------------------------------------
+-- TODO: Add support for interruptible/uninterruptible foreign call specification
+
{
-{-# OPTIONS -w #-}
+{-# OPTIONS -Wwarn -w -XNoMonomorphismRestriction #-}
+-- The NoMonomorphismRestriction deals with a Happy infelicity
+-- With OutsideIn's more conservativ monomorphism restriction
+-- we aren't generalising
+-- notHappyAtAll = error "urk"
+-- which is terrible. Switching off the restriction allows
+-- the generalisation. Better would be to make Happy generate
+-- an appropriate signature.
+--
-- 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
module CmmParse ( parseCmmFile ) where
-import CgMonad
+import CgMonad hiding (getDynFlags)
+import CgExtCode
import CgHeapery
import CgUtils
import CgProf
import Lexer
import ForeignCall
+import Module
import Literal
import Unique
import UniqFM
import Panic
import Constants
import Outputable
+import BasicTypes
import Bag ( emptyBag, unitBag )
+import Var
import Control.Monad
import Data.Array
#include "HsVersions.h"
}
+%expect 0
+
%token
':' { L _ (CmmT_SpecChar ':') }
';' { L _ (CmmT_SpecChar ';') }
| cmmdata { $1 }
| decl { $1 }
| 'CLOSURE' '(' NAME ',' NAME lits ')' ';'
- { do lits <- sequence $6;
- staticClosure $3 $5 (map getLit lits) }
+ {% withThisPackage $ \pkg ->
+ do lits <- sequence $6;
+ staticClosure pkg $3 $5 (map getLit lits) }
-- The only static closures in the RTS are dummy closures like
-- stg_END_TSO_QUEUE_closure and stg_dummy_ret. We don't need
-- Strings aren't used much in the RTS HC code, so it doesn't seem
-- worth allowing inline strings. C-- doesn't allow them anyway.
static :: { ExtFCode [CmmStatic] }
- : NAME ':' { return [CmmDataLabel (mkRtsDataLabelFS $1)] }
+ : NAME ':'
+ {% withThisPackage $ \pkg ->
+ return [CmmDataLabel (mkCmmDataLabel pkg $1)] }
+
| type expr ';' { do e <- $2;
return [CmmStaticLit (getLit e)] }
| type ';' { return [CmmUninitialised
| 'CLOSURE' '(' NAME lits ')'
{ do lits <- sequence $4;
return $ map CmmStaticLit $
- mkStaticClosure (mkForeignLabel $3 Nothing True)
+ mkStaticClosure (mkForeignLabel $3 Nothing ForeignLabelInExternalPackage IsData)
-- mkForeignLabel because these are only used
-- for CHARLIKE and INTLIKE closures in the RTS.
dontCareCCS (map getLit lits) [] [] [] }
code (emitInfoTableAndCode entry_ret_label (CmmInfo Nothing Nothing info) formals []) }
| NAME maybe_formals_without_hints maybe_gc_block maybe_frame '{' body '}'
- { do ((formals, gc_block, frame), stmts) <-
- getCgStmtsEC' $ loopDecls $ do {
- formals <- sequence $2;
- gc_block <- $3;
- frame <- $4;
- $6;
- return (formals, gc_block, frame) }
- blks <- code (cgStmtsToBlocks stmts)
- code (emitProc (CmmInfo gc_block frame CmmNonInfoTable) (mkRtsCodeLabelFS $1) formals blks) }
+ {% withThisPackage $ \pkg ->
+ do newFunctionName $1 pkg
+ ((formals, gc_block, frame), stmts) <-
+ getCgStmtsEC' $ loopDecls $ do {
+ formals <- sequence $2;
+ gc_block <- $3;
+ frame <- $4;
+ $6;
+ return (formals, gc_block, frame) }
+ blks <- code (cgStmtsToBlocks stmts)
+ code (emitProc (CmmInfo gc_block frame CmmNonInfoTable) (mkCmmCodeLabel pkg $1) formals blks) }
info :: { ExtFCode (CLabel, CmmInfoTable, [Maybe LocalReg]) }
: 'INFO_TABLE' '(' NAME ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, closure type, description, type
- { do prof <- profilingInfo $11 $13
- return (mkRtsEntryLabelFS $3,
- CmmInfoTable prof (fromIntegral $9)
+ {% withThisPackage $ \pkg ->
+ do prof <- profilingInfo $11 $13
+ return (mkCmmEntryLabel pkg $3,
+ CmmInfoTable False 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 (mkRtsEntryLabelFS $3,
- CmmInfoTable prof (fromIntegral $9)
+ {% withThisPackage $ \pkg ->
+ do prof <- profilingInfo $11 $13
+ return (mkCmmEntryLabel pkg $3,
+ CmmInfoTable False prof (fromIntegral $9)
(FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT
0 -- Arity zero
(ArgSpec (fromIntegral $15))
-- 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)
+ {% withThisPackage $ \pkg ->
+ do prof <- profilingInfo $11 $13
+ return (mkCmmEntryLabel pkg $3,
+ CmmInfoTable False prof (fromIntegral $9)
(FunInfo (fromIntegral $5, fromIntegral $7) NoC_SRT (fromIntegral $17)
(ArgSpec (fromIntegral $15))
zeroCLit),
| 'INFO_TABLE_CONSTR' '(' NAME ',' INT ',' INT ',' INT ',' INT ',' STRING ',' STRING ')'
-- ptrs, nptrs, tag, closure type, description, type
- { do prof <- profilingInfo $13 $15
+ {% withThisPackage $ \pkg ->
+ 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 (mkRtsEntryLabelFS $3,
- CmmInfoTable prof (fromIntegral $11)
+ desc_lit <- code $ mkStringCLit $13
+ return (mkCmmEntryLabel pkg $3,
+ CmmInfoTable False 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 (mkRtsEntryLabelFS $3,
- CmmInfoTable prof (fromIntegral $7)
+ {% withThisPackage $ \pkg ->
+ do prof <- profilingInfo $9 $11
+ return (mkCmmEntryLabel pkg $3,
+ CmmInfoTable False prof (fromIntegral $7)
(ThunkSelectorInfo (fromIntegral $5) NoC_SRT),
[]) }
| 'INFO_TABLE_RET' '(' NAME ',' INT ')'
-- closure type (no live regs)
- { do let infoLabel = mkRtsInfoLabelFS $3
- return (mkRtsRetLabelFS $3,
- CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
+ {% withThisPackage $ \pkg ->
+ do let infoLabel = mkCmmInfoLabel pkg $3
+ return (mkCmmRetLabel pkg $3,
+ CmmInfoTable False (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
(ContInfo [] NoC_SRT),
[]) }
| 'INFO_TABLE_RET' '(' NAME ',' INT ',' formals_without_hints0 ')'
-- closure type, live regs
- { do live <- sequence (map (liftM Just) $7)
- return (mkRtsRetLabelFS $3,
- CmmInfoTable (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
+ {% withThisPackage $ \pkg ->
+ do live <- sequence (map (liftM Just) $7)
+ return (mkCmmRetLabel pkg $3,
+ CmmInfoTable False (ProfilingInfo zeroCLit zeroCLit) (fromIntegral $5)
(ContInfo live NoC_SRT),
live) }
decl :: { ExtCode }
: type names ';' { mapM_ (newLocal $1) $2 }
- | 'import' names ';' { mapM_ newImport $2 }
+ | 'import' importNames ';' { mapM_ newImport $2 }
| 'export' names ';' { return () } -- ignore exports
+
+-- an imported function name, with optional packageId
+importNames
+ :: { [(FastString, CLabel)] }
+ : importName { [$1] }
+ | importName ',' importNames { $1 : $3 }
+
+importName
+ :: { (FastString, CLabel) }
+
+ -- A label imported without an explicit packageId.
+ -- These are taken to come frome some foreign, unnamed package.
+ : NAME
+ { ($1, mkForeignLabel $1 Nothing ForeignLabelInExternalPackage IsFunction) }
+
+ -- A label imported with an explicit packageId.
+ | STRING NAME
+ { ($2, mkCmmCodeLabel (fsToPackageId (mkFastString $1)) $2) }
+
+
names :: { [FastString] }
- : NAME { [$1] }
- | NAME ',' names { $1 : $3 }
+ : NAME { [$1] }
+ | NAME ',' names { $1 : $3 }
stmt :: { ExtCode }
: ';' { nopEC }
parseSafety :: String -> P CmmSafety
parseSafety "safe" = return (CmmSafe NoC_SRT)
parseSafety "unsafe" = return CmmUnsafe
+parseSafety "interruptible" = return CmmInterruptible
parseSafety str = fail ("unrecognised safety: " ++ str)
parseCmmHint :: String -> P ForeignHint
]
--- -----------------------------------------------------------------------------
--- Our extended FCode monad.
-
--- We add a mapping from names to CmmExpr, to support local variable names in
--- the concrete C-- code. The unique supply of the underlying FCode monad
--- is used to grab a new unique for each local variable.
-
--- In C--, a local variable can be declared anywhere within a proc,
--- and it scopes from the beginning of the proc to the end. Hence, we have
--- to collect declarations as we parse the proc, and feed the environment
--- back in circularly (to avoid a two-pass algorithm).
-
-data Named = Var CmmExpr | Label BlockId
-type Decls = [(FastString,Named)]
-type Env = UniqFM Named
-
-newtype ExtFCode a = EC { unEC :: Env -> Decls -> FCode (Decls, a) }
-
-type ExtCode = ExtFCode ()
-
-returnExtFC a = EC $ \e s -> return (s, a)
-thenExtFC (EC m) k = EC $ \e s -> do (s',r) <- m e s; unEC (k r) e s'
-
-instance Monad ExtFCode where
- (>>=) = thenExtFC
- return = returnExtFC
-
--- This function takes the variable decarations and imports and makes
--- 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 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)
-
-addVarDecl :: FastString -> CmmExpr -> ExtCode
-addVarDecl var expr = EC $ \e s -> return ((var, Var expr):s, ())
-
-addLabel :: FastString -> BlockId -> ExtCode
-addLabel name block_id = EC $ \e s -> return ((name, Label block_id):s, ())
-
-newLocal :: CmmType -> FastString -> ExtFCode LocalReg
-newLocal ty name = do
- u <- code newUnique
- let reg = LocalReg u ty
- 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
- addLabel name (BlockId u)
- return (BlockId u)
-
-lookupLabel :: FastString -> ExtFCode BlockId
-lookupLabel name = do
- env <- getEnv
- return $
- case lookupUFM env name of
- Just (Label l) -> l
- _other -> BlockId (newTagUnique (getUnique name) 'L')
-
--- Unknown names are treated as if they had been 'import'ed.
--- This saves us a lot of bother in the RTS sources, at the expense of
--- deferring some errors to link time.
-lookupName :: FastString -> ExtFCode CmmExpr
-lookupName name = do
- env <- getEnv
- return $
- case lookupUFM env name of
- Just (Var e) -> e
- _other -> CmmLit (CmmLabel (mkRtsCodeLabelFS name))
-
--- Lifting FCode computations into the ExtFCode monad:
-code :: FCode a -> ExtFCode a
-code fc = EC $ \e s -> do r <- fc; return (s, r)
-
-code2 :: (FCode (Decls,b) -> FCode ((Decls,b),c))
- -> ExtFCode b -> ExtFCode c
-code2 f (EC ec) = EC $ \e s -> do ((s',b),c) <- f (ec e s); return (s',c)
-
-nopEC = code nopC
-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)
profilingInfo desc_str ty_str = do
return (ProfilingInfo lit1 lit2)
-staticClosure :: FastString -> FastString -> [CmmLit] -> ExtCode
-staticClosure cl_label info payload
- = code $ emitDataLits (mkRtsDataLabelFS cl_label) lits
- where lits = mkStaticClosure (mkRtsInfoLabelFS info) dontCareCCS payload [] [] []
+staticClosure :: PackageId -> FastString -> FastString -> [CmmLit] -> ExtCode
+staticClosure pkg cl_label info payload
+ = code $ emitDataLits (mkCmmDataLabel pkg cl_label) lits
+ where lits = mkStaticClosure (mkCmmInfoLabel pkg info) dontCareCCS payload [] [] []
foreignCall
:: String
code (emitForeignCall' (PlaySafe unused) results
(CmmCallee expr' convention) args vols NoC_SRT ret) where
unused = panic "not used by emitForeignCall'"
+ CmmInterruptible ->
+ code (emitForeignCall' PlayInterruptible results
+ (CmmCallee expr' convention) args vols NoC_SRT ret)
adjCallTarget :: CCallConv -> CmmExpr -> [CmmHinted CmmExpr] -> CmmExpr
#ifdef mingw32_TARGET_OS
code (emitForeignCall' (PlaySafe unused) results
(CmmPrim p) args vols NoC_SRT CmmMayReturn) where
unused = panic "not used by emitForeignCall'"
+ CmmInterruptible ->
+ code (emitForeignCall' PlayInterruptible results
+ (CmmPrim p) args vols NoC_SRT CmmMayReturn)
doStore :: CmmType -> ExtFCode CmmExpr -> ExtFCode CmmExpr -> ExtCode
doStore rep addr_code val_code
emitRetUT args = do
tickyUnboxedTupleReturn (length args) -- TICK
(sp, stmts) <- pushUnboxedTuple 0 args
- emitStmts stmts
+ emitSimultaneously stmts -- NB. the args might overlap with the stack slots
+ -- or regs that we assign to, so better use
+ -- simultaneous assignments here (#3546)
when (sp /= 0) $ stmtC (CmmAssign spReg (cmmRegOffW spReg (-sp)))
stmtC (CmmJump (entryCode (CmmLoad (cmmRegOffW spReg sp) bWord)) [])
-- TODO (when using CPS): emitStmt (CmmReturn (map snd args))
showPass dflags "ParseCmm"
buf <- hGetStringBuffer filename
let
- init_loc = mkSrcLoc (mkFastString filename) 1 0
- init_state = (mkPState buf init_loc dflags) { lex_state = [0] }
+ init_loc = mkSrcLoc (mkFastString filename) 1 1
+ init_state = (mkPState dflags buf init_loc) { lex_state = [0] }
-- reset the lex_state: the Lexer monad leaves some stuff
-- in there we don't want.
case unP cmmParse init_state of
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