X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FcodeGen%2FSMRep.lhs;h=987562c3642271f5f2aecf322cc8174dd46f1079;hb=785e4ab34b25c6f023183d6fabf5e74b27b416f9;hp=c807703b132a404273aaf450134c03cacbf9b51d;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1;p=ghc-hetmet.git

diff --git a/compiler/codeGen/SMRep.lhs b/compiler/codeGen/SMRep.lhs
index c807703..987562c 100644
--- a/compiler/codeGen/SMRep.lhs
+++ b/compiler/codeGen/SMRep.lhs
@@ -1,12 +1,21 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
 %
-\section[SMRep]{Storage manager representations of closure}
+
+Storage manager representation of closures
 
 This is here, rather than in ClosureInfo, just to keep nhc happy.
 Other modules should access this info through ClosureInfo.
 
 \begin{code}
+{-# 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 SMRep (
 	-- Words and bytes
 	StgWord, StgHalfWord, 
@@ -15,39 +24,38 @@ module SMRep (
 
 	-- Argument/return representations
 	CgRep(..), nonVoidArg,
-	argMachRep, primRepToCgRep, primRepHint,
+	argMachRep, primRepToCgRep, 
+-- Temp primRepHint, typeHint,
 	isFollowableArg, isVoidArg, 
-	isFloatingArg, isNonPtrArg, is64BitArg,
+	isFloatingArg, is64BitArg,
 	separateByPtrFollowness,
 	cgRepSizeW, cgRepSizeB,
 	retAddrSizeW,
 
-	typeCgRep, idCgRep, tyConCgRep, typeHint,
+	typeCgRep, idCgRep, tyConCgRep, 
 
 	-- Closure repesentation
 	SMRep(..), ClosureType(..),
 	isStaticRep,
 	fixedHdrSize, arrWordsHdrSize, arrPtrsHdrSize,
 	profHdrSize, thunkHdrSize,
-	tablesNextToCode,
 	smRepClosureType, smRepClosureTypeInt,
 
-	rET_SMALL, rET_VEC_SMALL, rET_BIG, rET_VEC_BIG
+	rET_SMALL, rET_BIG
     ) where
 
-#include "HsVersions.h"
 #include "../includes/MachDeps.h"
 
-import Id		( Id, idType )
-import Type		( Type, typePrimRep, PrimRep(..) )
-import TyCon		( TyCon, tyConPrimRep )
-import MachOp--		( MachRep(..), MachHint(..), wordRep )
-import StaticFlags	( opt_SccProfilingOn, opt_GranMacros,
-			  opt_Unregisterised )
+import CmmExpr	-- CmmType and friends
+import Id
+import Type
+import TyCon
+import StaticFlags
 import Constants
 import Outputable
+import FastString
 
-import DATA_WORD
+import Data.Word
 \end{code}
 
 
@@ -112,27 +120,29 @@ entry to the garbage collector.
 \begin{code}
 data CgRep 
   = VoidArg 	-- Void
-  | PtrArg 	-- Word-sized Ptr
+  | PtrArg 	-- Word-sized heap pointer, followed
+		-- by the garbage collector
   | NonPtrArg 	-- Word-sized non-pointer
+		-- (including addresses not followed by GC)
   | LongArg	-- 64-bit non-pointer
   | FloatArg 	-- 32-bit float
   | DoubleArg 	-- 64-bit float
   deriving Eq
 
 instance Outputable CgRep where
-    ppr VoidArg   = ptext SLIT("V_")
-    ppr PtrArg    = ptext SLIT("P_")
-    ppr NonPtrArg = ptext SLIT("I_")
-    ppr LongArg   = ptext SLIT("L_")
-    ppr FloatArg  = ptext SLIT("F_")
-    ppr DoubleArg = ptext SLIT("D_")
-
-argMachRep :: CgRep -> MachRep
-argMachRep PtrArg    = wordRep
-argMachRep NonPtrArg = wordRep
-argMachRep LongArg   = I64
-argMachRep FloatArg  = F32
-argMachRep DoubleArg = F64
+    ppr VoidArg   = ptext (sLit "V_")
+    ppr PtrArg    = ptext (sLit "P_")
+    ppr NonPtrArg = ptext (sLit "I_")
+    ppr LongArg   = ptext (sLit "L_")
+    ppr FloatArg  = ptext (sLit "F_")
+    ppr DoubleArg = ptext (sLit "D_")
+
+argMachRep :: CgRep -> CmmType
+argMachRep PtrArg    = gcWord
+argMachRep NonPtrArg = bWord
+argMachRep LongArg   = b64
+argMachRep FloatArg  = f32
+argMachRep DoubleArg = f64
 argMachRep VoidArg   = panic "argMachRep:VoidRep"
 
 primRepToCgRep :: PrimRep -> CgRep
@@ -146,28 +156,14 @@ primRepToCgRep AddrRep    = NonPtrArg
 primRepToCgRep FloatRep   = FloatArg
 primRepToCgRep DoubleRep  = DoubleArg
 
-primRepHint :: PrimRep -> MachHint
-primRepHint VoidRep	= panic "primRepHint:VoidRep"
-primRepHint PtrRep	= PtrHint
-primRepHint IntRep	= SignedHint
-primRepHint WordRep	= NoHint
-primRepHint Int64Rep	= SignedHint
-primRepHint Word64Rep	= NoHint
-primRepHint AddrRep     = PtrHint -- NB! PtrHint, but NonPtrArg
-primRepHint FloatRep	= FloatHint
-primRepHint DoubleRep	= FloatHint
-
 idCgRep :: Id -> CgRep
-idCgRep = typeCgRep . idType
+idCgRep x = typeCgRep . idType $ x
 
 tyConCgRep :: TyCon -> CgRep
 tyConCgRep = primRepToCgRep . tyConPrimRep
 
 typeCgRep :: Type -> CgRep
-typeCgRep = primRepToCgRep . typePrimRep
-
-typeHint :: Type -> MachHint
-typeHint = primRepHint . typePrimRep
+typeCgRep = primRepToCgRep . typePrimRep 
 \end{code}
 
 Whether or not the thing is a pointer that the garbage-collector
@@ -200,11 +196,6 @@ isFloatingArg DoubleArg = True
 isFloatingArg FloatArg  = True
 isFloatingArg _         = False
 
-isNonPtrArg :: CgRep -> Bool
--- Identify anything which is one word large and not a pointer.
-isNonPtrArg NonPtrArg = True
-isNonPtrArg other     = False
-
 is64BitArg :: CgRep -> Bool
 is64BitArg LongArg = True
 is64BitArg _       = False
@@ -294,16 +285,6 @@ thunkHdrSize = fixedHdrSize + smp_hdr
 \end{code}
 
 \begin{code}
--- IA64 mangler doesn't place tables next to code
-tablesNextToCode :: Bool
-#if defined(ia64_TARGET_ARCH) || defined(powerpc64_TARGET_ARCH)
-tablesNextToCode = False
-#else
-tablesNextToCode = not opt_Unregisterised
-#endif
-\end{code}
-
-\begin{code}
 isStaticRep :: SMRep -> Bool
 isStaticRep (GenericRep is_static _ _ _) = is_static
 isStaticRep BlackHoleRep	         = False
@@ -313,12 +294,13 @@ isStaticRep BlackHoleRep	         = False
 #include "../includes/ClosureTypes.h"
 -- Defines CONSTR, CONSTR_1_0 etc
 
+-- krc: only called by tickyDynAlloc in CgTicky; return
+-- Nothing for a black hole so we can at least make something work.
+smRepClosureType :: SMRep -> Maybe ClosureType
+smRepClosureType (GenericRep _ _ _ ty) = Just ty
+smRepClosureType BlackHoleRep	       = Nothing
 
-smRepClosureType :: SMRep -> ClosureType
-smRepClosureType (GenericRep _ _ _ ty) = ty
-smRepClosureType BlackHoleRep	       = panic "smRepClosureType: black hole"
-
-smRepClosureTypeInt :: SMRep -> Int
+smRepClosureTypeInt :: SMRep -> StgHalfWord
 smRepClosureTypeInt (GenericRep False 1 0 Constr) = CONSTR_1_0
 smRepClosureTypeInt (GenericRep False 0 1 Constr) = CONSTR_0_1
 smRepClosureTypeInt (GenericRep False 2 0 Constr) = CONSTR_2_0
@@ -353,9 +335,7 @@ smRepClosureTypeInt rep = panic "smRepClosuretypeint"
 
 
 -- We export these ones
-rET_SMALL     = (RET_SMALL     :: Int)
-rET_VEC_SMALL = (RET_VEC_SMALL :: Int)
-rET_BIG       = (RET_BIG       :: Int)
-rET_VEC_BIG   = (RET_VEC_BIG   :: Int)
+rET_SMALL     = (RET_SMALL     :: StgHalfWord)
+rET_BIG       = (RET_BIG       :: StgHalfWord)
 \end{code}