%
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
-% $Id: AbsCSyn.lhs,v 1.23 1999/05/13 17:30:52 simonm Exp $
+% $Id: AbsCSyn.lhs,v 1.34 2000/10/12 13:11:46 simonmar Exp $
%
\section[AbstractC]{Abstract C: the last stop before machine code}
import {-# SOURCE #-} ClosureInfo ( ClosureInfo )
-#if ! OMIT_NATIVE_CODEGEN
-import {-# SOURCE #-} MachMisc
-#endif
-
import CLabel
import Constants ( mAX_Vanilla_REG, mAX_Float_REG,
mAX_Double_REG, spRelToInt )
import CostCentre ( CostCentre, CostCentreStack )
-import Const ( mkMachInt, Literal )
+import Literal ( mkMachInt, Literal(..) )
import PrimRep ( PrimRep(..) )
-import PrimOp ( PrimOp )
+import PrimOp ( PrimOp, CCall )
import Unique ( Unique )
import StgSyn ( SRT(..) )
import TyCon ( TyCon )
| CInitHdr -- to initialise the header of a closure (both fixed/var parts)
ClosureInfo
- RegRelative -- address of the info ptr
+ CAddrMode -- address of the info ptr
CAddrMode -- cost centre to place in closure
-- CReg CurCostCentre or CC_HDR(R1.p{-Node-})
typedefs if needs be (i.e., when generating .hc code and
compiling 'foreign import dynamic's)
-}
- | CCallTypedef PrimOp{-CCallOp-} [CAddrMode] [CAddrMode]
+ | CCallTypedef Bool {- True => use "typedef"; False => use "extern"-}
+ CCall [CAddrMode] [CAddrMode]
-- *** the next three [or so...] are DATA (those above are CODE) ***
| CClosureTbl -- table of constructors for enumerated types
TyCon -- which TyCon this table is for
+ | CModuleInitBlock -- module initialisation block
+ CLabel -- label for init block
+ AbstractC -- initialisation code
+
| CCostCentreDecl -- A cost centre *declaration*
Bool -- True <=> local => full declaration
-- False <=> extern; just say so
| UPD_BH_SINGLE_ENTRY -- more eager blackholing
| PUSH_UPD_FRAME -- push update frame
| PUSH_SEQ_FRAME -- push seq frame
+ | UPDATE_SU_FROM_UPD_FRAME -- pull Su out of the update frame
| SET_TAG -- set TagReg if it exists
+
+ | REGISTER_FOREIGN_EXPORT -- register a foreign exported fun
+ | REGISTER_IMPORT -- register an imported module
+ | REGISTER_DIMPORT -- register an imported module from
+ -- another DLL
+
| GRAN_FETCH -- for GrAnSim only -- HWL
| GRAN_RESCHEDULE -- for GrAnSim only -- HWL
| GRAN_FETCH_AND_RESCHEDULE -- for GrAnSim only -- HWL
| THREAD_CONTEXT_SWITCH -- for GrAnSim only -- HWL
| GRAN_YIELD -- for GrAnSim only -- HWL
- deriving Text
\end{code}
Heap/Stack checks. There are far too many of these.
| HP_CHK_UT_ALT -- unboxed tuple return.
| HP_CHK_GEN -- generic heap check
- deriving Text
\end{code}
\item[@CCallProfCtrMacro@:]
| CReg MagicId -- To replace (CAddr MagicId 0)
- | CTableEntry -- CVal should be generalized to allow this
- CAddrMode -- Base
- CAddrMode -- Offset
- PrimRep -- For casting
-
| CTemp !Unique !PrimRep -- Temporary locations
-- ``Temporaries'' correspond to local variables in C, and registers in
-- native code.
| CCharLike CAddrMode -- The address of a static char-like closure for
-- the specified character. It is guaranteed to be in
- -- the range 0..255.
+ -- the range mIN_CHARLIKE..mAX_CHARLIKE
| CIntLike CAddrMode -- The address of a static int-like closure for the
-- specified small integer. It is guaranteed to be in
-- the range mIN_INTLIKE..mAX_INTLIKE
- | CString FAST_STRING -- The address of the null-terminated string
| CLit Literal
- | CLitLit FAST_STRING -- completely literal literal: just spit this String
- -- into the C output
- PrimRep
| CJoinPoint -- This is used as the amode of a let-no-escape-bound
-- variable.
= ENTRY_CODE
| ARG_TAG -- stack argument tagging
| GET_TAG -- get current constructor tag
- deriving(Text)
+ | UPD_FRAME_UPDATEE
+ | CCS_HDR
\end{code}
mkIntCLit :: Int -> CAddrMode
mkIntCLit i = CLit (mkMachInt (toInteger i))
+mkCString :: FAST_STRING -> CAddrMode
+mkCString s = CLit (MachStr s)
+
mkCCostCentre :: CostCentre -> CAddrMode
mkCCostCentre cc = CLbl (mkCC_Label cc) DataPtrRep
\begin{code}
data RegRelative
- = HpRel FAST_INT -- }
- | SpRel FAST_INT -- }- offsets in StgWords
- | NodeRel FAST_INT -- }
+ = HpRel FastInt -- }
+ | SpRel FastInt -- }- offsets in StgWords
+ | NodeRel FastInt -- }
+ | CIndex CAddrMode CAddrMode PrimRep -- pointer arithmetic :-)
+ -- CIndex a b k === (k*)a[b]
data ReturnInfo
= DirectReturn -- Jump directly, if possible
hpRel :: VirtualHeapOffset -- virtual offset of Hp
-> VirtualHeapOffset -- virtual offset of The Thing
-> RegRelative -- integer offset
-hpRel IBOX(hp) IBOX(off) = HpRel (hp _SUB_ off)
+hpRel _IBOX(hp) _IBOX(off) = HpRel (hp _SUB_ off)
spRel :: VirtualSpOffset -- virtual offset of Sp
-> VirtualSpOffset -- virtual offset of The Thing
-> RegRelative -- integer offset
-spRel sp off = SpRel (case spRelToInt sp off of { IBOX(i) -> i })
+spRel sp off = SpRel (case spRelToInt sp off of { _IBOX(i) -> i })
nodeRel :: VirtualHeapOffset
-> RegRelative
-nodeRel IBOX(off) = NodeRel off
+nodeRel _IBOX(off) = NodeRel off
\end{code}
%************************************************************************
%* *
-\subsection[RegRelative]{@RegRelatives@: ???}
+\subsection[Liveness]{Liveness Masks}
%* *
%************************************************************************
-- Argument and return registers
| VanillaReg -- pointers, unboxed ints and chars
PrimRep
- FAST_INT -- its number (1 .. mAX_Vanilla_REG)
+ FastInt -- its number (1 .. mAX_Vanilla_REG)
| FloatReg -- single-precision floating-point registers
- FAST_INT -- its number (1 .. mAX_Float_REG)
+ FastInt -- its number (1 .. mAX_Float_REG)
| DoubleReg -- double-precision floating-point registers
- FAST_INT -- its number (1 .. mAX_Double_REG)
+ FastInt -- its number (1 .. mAX_Double_REG)
-- STG registers
| Sp -- Stack ptr; points to last occupied stack location.
-- no actual register
| LongReg -- long int registers (64-bit, really)
PrimRep -- Int64Rep or Word64Rep
- FAST_INT -- its number (1 .. mAX_Long_REG)
+ FastInt -- its number (1 .. mAX_Long_REG)
+
+ | CurrentTSO -- pointer to current thread's TSO
+ | CurrentNursery -- pointer to allocation area
-node = VanillaReg PtrRep ILIT(1) -- A convenient alias for Node
-tagreg = VanillaReg WordRep ILIT(2) -- A convenient alias for TagReg
+node = VanillaReg PtrRep _ILIT(1) -- A convenient alias for Node
+tagreg = VanillaReg WordRep _ILIT(2) -- A convenient alias for TagReg
+nodeReg = CReg node
\end{code}
We need magical @Eq@ because @VanillaReg@s come in multiple flavors.
\begin{code}
instance Eq MagicId where
- reg1 == reg2 = tag reg1 _EQ_ tag reg2
+ reg1 == reg2 = tag reg1 ==# tag reg2
where
- tag BaseReg = (ILIT(0) :: FAST_INT)
- tag Sp = ILIT(1)
- tag Su = ILIT(2)
- tag SpLim = ILIT(3)
- tag Hp = ILIT(4)
- tag HpLim = ILIT(5)
- tag CurCostCentre = ILIT(6)
- tag VoidReg = ILIT(7)
-
- tag (VanillaReg _ i) = ILIT(8) _ADD_ i
-
- tag (FloatReg i) = ILIT(8) _ADD_ maxv _ADD_ i
- tag (DoubleReg i) = ILIT(8) _ADD_ maxv _ADD_ maxf _ADD_ i
- tag (LongReg _ i) = ILIT(8) _ADD_ maxv _ADD_ maxf _ADD_ maxd _ADD_ i
-
- maxv = case mAX_Vanilla_REG of { IBOX(x) -> x }
- maxf = case mAX_Float_REG of { IBOX(x) -> x }
- maxd = case mAX_Double_REG of { IBOX(x) -> x }
+ tag BaseReg = (_ILIT(0) :: FastInt)
+ tag Sp = _ILIT(1)
+ tag Su = _ILIT(2)
+ tag SpLim = _ILIT(3)
+ tag Hp = _ILIT(4)
+ tag HpLim = _ILIT(5)
+ tag CurCostCentre = _ILIT(6)
+ tag VoidReg = _ILIT(7)
+
+ tag (VanillaReg _ i) = _ILIT(8) +# i
+
+ tag (FloatReg i) = _ILIT(8) +# maxv +# i
+ tag (DoubleReg i) = _ILIT(8) +# maxv +# maxf +# i
+ tag (LongReg _ i) = _ILIT(8) +# maxv +# maxf +# maxd +# i
+
+ maxv = iUnbox mAX_Vanilla_REG
+ maxf = iUnbox mAX_Float_REG
+ maxd = iUnbox mAX_Double_REG
\end{code}
Returns True for any register that {\em potentially} dies across
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