%
+% (c) The University of Glasgow 2006
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
-% $Id: CgHeapery.lhs,v 1.47 2005/06/21 10:44:41 simonmar Exp $
-%
\section[CgHeapery]{Heap management functions}
\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 CgHeapery (
initHeapUsage, getVirtHp, setVirtHp, setRealHp,
getHpRelOffset, hpRel,
#include "HsVersions.h"
-import StgSyn ( AltType(..) )
-import CLabel ( CLabel, mkRtsCodeLabel )
-import CgUtils ( mkWordCLit, cmmRegOffW, cmmOffsetW,
- cmmOffsetExprB )
+import StgSyn
+import CLabel
+import CgUtils
import CgMonad
-import CgProf ( staticProfHdr, profDynAlloc, dynProfHdr )
-import CgTicky ( staticTickyHdr, tickyDynAlloc, tickyAllocHeap )
-import CgParallel ( staticGranHdr, staticParHdr, doGranAllocate )
-import CgStackery ( getFinalStackHW, getRealSp )
-import CgCallConv ( mkRegLiveness )
-import ClosureInfo ( closureSize, staticClosureNeedsLink,
- mkConInfo, closureNeedsUpdSpace,
- infoTableLabelFromCI, closureLabelFromCI,
- nodeMustPointToIt, closureLFInfo,
- ClosureInfo )
-import SMRep ( CgRep(..), cgRepSizeW, separateByPtrFollowness,
- WordOff, fixedHdrSize, thunkHdrSize,
- isVoidArg, primRepToCgRep )
-
-import Cmm ( CmmLit(..), CmmStmt(..), CmmExpr(..), GlobalReg(..),
- CmmReg(..), hpReg, nodeReg, spReg )
-import MachOp ( mo_wordULt, mo_wordUGt, mo_wordSub )
-import CmmUtils ( mkIntCLit, CmmStmts, noStmts, oneStmt, plusStmts,
- mkStmts )
-import Id ( Id )
-import DataCon ( DataCon )
-import TyCon ( tyConPrimRep )
-import CostCentre ( CostCentreStack )
-import Util ( mapAccumL, filterOut )
-import Constants ( wORD_SIZE )
-import Packages ( HomeModules )
+import CgProf
+import CgTicky
+import CgParallel
+import CgStackery
+import CgCallConv
+import ClosureInfo
+import SMRep
+
+import Cmm
+import MachOp
+import CmmUtils
+import Id
+import DataCon
+import TyCon
+import CostCentre
+import Util
+import Constants
+import PackageConfig
import Outputable
+import Data.List
\end{code}
\begin{code}
layOutDynConstr, layOutStaticConstr
- :: HomeModules
- -> DataCon
+ :: DataCon
-> [(CgRep,a)]
-> (ClosureInfo,
[(a,VirtualHpOffset)])
layOutDynConstr = layOutConstr False
layOutStaticConstr = layOutConstr True
-layOutConstr is_static hmods data_con args
- = (mkConInfo hmods is_static data_con tot_wds ptr_wds,
+layOutConstr is_static data_con args
+ = (mkConInfo is_static data_con tot_wds ptr_wds,
things_w_offsets)
where
(tot_wds, -- #ptr_wds + #nonptr_wds
mkStaticClosure info_lbl ccs payload padding_wds static_link_field saved_info_field
= [CmmLabel info_lbl]
++ variable_header_words
- ++ payload
+ ++ concatMap padLitToWord payload
++ padding_wds
++ static_link_field
++ saved_info_field
++ staticParHdr
++ staticProfHdr ccs
++ staticTickyHdr
+
+padLitToWord :: CmmLit -> [CmmLit]
+padLitToWord lit = lit : padding pad_length
+ where rep = cmmLitRep lit
+ pad_length = wORD_SIZE - machRepByteWidth rep :: Int
+
+ padding n | n <= 0 = []
+ | n `rem` 2 /= 0 = CmmInt 0 I8 : padding (n-1)
+ | n `rem` 4 /= 0 = CmmInt 0 I16 : padding (n-2)
+ | n `rem` 8 /= 0 = CmmInt 0 I32 : padding (n-4)
+ | otherwise = CmmInt 0 I64 : padding (n-8)
\end{code}
%************************************************************************
= noStmts
| otherwise
= oneStmt (CmmAssign nodeReg (CmmLit (CmmLabel closure_lbl)))
+ -- Strictly speaking, we should tag node here. But if
+ -- node doesn't point to the closure, the code for the closure
+ -- cannot depend on the value of R1 anyway, so we're safe.
closure_lbl = closureLabelFromCI cl_info
full_save_code = node_asst `plusStmts` reg_save_code
[CmmMachOp mo_wordSub [CmmReg spReg, stk_expr],
CmmReg (CmmGlobal SpLim)]
- -- Hp overflow if (Hpp > HpLim)
+ -- Hp overflow if (Hp > HpLim)
-- (Hp has been incremented by now)
-- HpLim points to the LAST WORD of valid allocation space.
hp_oflo = CmmMachOp mo_wordUGt