Add {-# OPTIONS_GHC -w #-} and some blurb to all compiler modules

[ghc-hetmet.git] / compiler / codeGen / CgHeapery.lhs

diff --git a/compiler/codeGen/CgHeapery.lhs b/compiler/codeGen/CgHeapery.lhs
index ae6c892..10f5049 100644 (file)
--- a/compiler/codeGen/CgHeapery.lhs
+++ b/compiler/codeGen/CgHeapery.lhs
@@ -1,11 +1,17 @@
 %
+% (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_GHC -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/WorkingConventions#Warnings
+-- for details
+
 module CgHeapery (
        initHeapUsage, getVirtHp, setVirtHp, setRealHp, 
        getHpRelOffset, hpRel,
@@ -23,39 +29,31 @@ module CgHeapery (
 
 #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 PackageConfig   ( PackageId )
+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}
 
 
@@ -123,8 +121,7 @@ getHpRelOffset virtual_offset
 
 \begin{code}
 layOutDynConstr, layOutStaticConstr
-       :: PackageId
-       -> DataCon      
+       :: DataCon
        -> [(CgRep,a)]
        -> (ClosureInfo,
            [(a,VirtualHpOffset)])
@@ -132,8 +129,8 @@ layOutDynConstr, layOutStaticConstr
 layOutDynConstr    = layOutConstr False
 layOutStaticConstr = layOutConstr True
 
-layOutConstr  is_static this_pkg data_con args
-   = (mkConInfo this_pkg 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
@@ -297,6 +294,9 @@ hpStkCheck cl_info is_fun reg_save_code 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
@@ -465,7 +465,7 @@ do_checks' stk_expr hp_expr stk_nonzero hp_nonzero reg_save_code rts_lbl
                  [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