X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FcodeGen%2FCgCon.lhs;h=b7dde73a97dcb81204865d6567daa016da182f37;hp=115439a0fd93038d9a6070d997c41d4b8ad8d244;hb=30c122df62ec75f9ed7f392f24c2925675bf1d06;hpb=61d2625ae2e6a4cdae2ffc92df828905e81c24cc diff --git a/compiler/codeGen/CgCon.lhs b/compiler/codeGen/CgCon.lhs index 115439a..b7dde73 100644 --- a/compiler/codeGen/CgCon.lhs +++ b/compiler/codeGen/CgCon.lhs @@ -1,4 +1,5 @@ % +% (c) The University of Glasgow 2006 % (c) The GRASP Project, Glasgow University, 1992-1998 % \section[CgCon]{Code generation for constructors} @@ -8,6 +9,13 @@ with {\em constructors} on the RHSs of let(rec)s. See also @CgClosure@, which deals with closures. \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 CgCon ( cgTopRhsCon, buildDynCon, bindConArgs, bindUnboxedTupleComponents, @@ -20,40 +28,31 @@ module CgCon ( import CgMonad import StgSyn -import CgBindery ( getArgAmodes, bindNewToNode, - bindArgsToRegs, idInfoToAmode, stableIdInfo, - heapIdInfo, CgIdInfo, bindArgsToStack - ) -import CgStackery ( mkVirtStkOffsets, freeStackSlots, - getRealSp, getVirtSp, setRealAndVirtualSp ) -import CgUtils ( addIdReps, cmmLabelOffW, emitRODataLits, emitDataLits ) -import CgCallConv ( assignReturnRegs ) -import CgHeapery ( allocDynClosure, layOutDynConstr, - layOutStaticConstr, mkStaticClosureFields ) -import CgTailCall ( performReturn, emitKnownConReturnCode, returnUnboxedTuple ) -import CgProf ( mkCCostCentreStack, ldvEnter, curCCS ) +import CgBindery +import CgStackery +import CgUtils +import CgCallConv +import CgHeapery +import CgTailCall +import CgProf import CgTicky -import CgInfoTbls ( emitClosureCodeAndInfoTable, dataConTagZ ) +import CgInfoTbls import CLabel -import ClosureInfo ( mkConLFInfo, mkLFArgument ) -import CmmUtils ( mkLblExpr ) +import ClosureInfo +import CmmUtils import Cmm -import SMRep ( WordOff, CgRep, separateByPtrFollowness, - fixedHdrSize, typeCgRep ) -import CostCentre ( currentOrSubsumedCCS, dontCareCCS, CostCentreStack, - currentCCS ) -import Constants ( mIN_INTLIKE, mAX_INTLIKE, mIN_CHARLIKE, mAX_CHARLIKE ) -import TyCon ( TyCon, tyConDataCons, isEnumerationTyCon, tyConName ) -import DataCon ( DataCon, dataConRepArgTys, isNullaryRepDataCon, - isUnboxedTupleCon, dataConWorkId, - dataConName, dataConRepArity - ) -import Id ( Id, idName, isDeadBinder ) -import Type ( Type ) -import PrelInfo ( maybeCharLikeCon, maybeIntLikeCon ) +import SMRep +import CostCentre +import Constants +import TyCon +import DataCon +import Id +import Type +import PrelInfo import Outputable -import Util ( lengthIs ) -import ListSetOps ( assocMaybe ) +import ListSetOps +import Util +import FastString \end{code} @@ -70,9 +69,9 @@ cgTopRhsCon :: Id -- Name of thing bound to this RHS -> FCode (Id, CgIdInfo) cgTopRhsCon id con args = do { - ; this_pkg <- getThisPackage #if mingw32_TARGET_OS -- Windows DLLs have a problem with static cross-DLL refs. + ; this_pkg <- getThisPackage ; ASSERT( not (isDllConApp this_pkg con args) ) return () #endif ; ASSERT( args `lengthIs` dataConRepArity con ) return () @@ -83,9 +82,9 @@ cgTopRhsCon id con args ; let name = idName id lf_info = mkConLFInfo con - closure_label = mkClosureLabel this_pkg name + closure_label = mkClosureLabel name caffy = any stgArgHasCafRefs args - (closure_info, amodes_w_offsets) = layOutStaticConstr this_pkg con amodes + (closure_info, amodes_w_offsets) = layOutStaticConstr con amodes closure_rep = mkStaticClosureFields closure_info dontCareCCS -- Because it's static data @@ -102,7 +101,7 @@ cgTopRhsCon id con args ; emitDataLits closure_label closure_rep -- RETURN - ; returnFC (id, stableIdInfo id (mkLblExpr closure_label) lf_info) } + ; returnFC (id, taggedStableIdInfo id (mkLblExpr closure_label) lf_info con) } \end{code} %************************************************************************ @@ -142,10 +141,10 @@ at all. \begin{code} buildDynCon binder cc con [] - = do this_pkg <- getThisPackage - returnFC (stableIdInfo binder - (mkLblExpr (mkClosureLabel this_pkg (dataConName con))) - (mkConLFInfo con)) + = returnFC (taggedStableIdInfo binder + (mkLblExpr (mkClosureLabel (dataConName con))) + (mkConLFInfo con) + con) \end{code} The following three paragraphs about @Char@-like and @Int@-like @@ -179,7 +178,7 @@ buildDynCon binder cc con [arg_amode] offsetW = (val_int - mIN_INTLIKE) * (fixedHdrSize + 1) -- INTLIKE closures consist of a header and one word payload intlike_amode = CmmLit (cmmLabelOffW intlike_lbl offsetW) - ; returnFC (stableIdInfo binder intlike_amode (mkConLFInfo con)) } + ; returnFC (taggedStableIdInfo binder intlike_amode (mkConLFInfo con) con) } buildDynCon binder cc con [arg_amode] | maybeCharLikeCon con @@ -190,7 +189,7 @@ buildDynCon binder cc con [arg_amode] offsetW = (val_int - mIN_CHARLIKE) * (fixedHdrSize + 1) -- CHARLIKE closures consist of a header and one word payload charlike_amode = CmmLit (cmmLabelOffW charlike_lbl offsetW) - ; returnFC (stableIdInfo binder charlike_amode (mkConLFInfo con)) } + ; returnFC (taggedStableIdInfo binder charlike_amode (mkConLFInfo con) con) } \end{code} Now the general case. @@ -198,12 +197,11 @@ Now the general case. \begin{code} buildDynCon binder ccs con args = do { - ; this_pkg <- getThisPackage ; let - (closure_info, amodes_w_offsets) = layOutDynConstr this_pkg con args + (closure_info, amodes_w_offsets) = layOutDynConstr con args ; hp_off <- allocDynClosure closure_info use_cc blame_cc amodes_w_offsets - ; returnFC (heapIdInfo binder hp_off lf_info) } + ; returnFC (taggedHeapIdInfo binder hp_off lf_info con) } where lf_info = mkConLFInfo con @@ -230,10 +228,12 @@ found a $con$. \begin{code} bindConArgs :: DataCon -> [Id] -> Code bindConArgs con args - = do this_pkg <- getThisPackage + = do let - bind_arg (arg, offset) = bindNewToNode arg offset (mkLFArgument arg) - (_, args_w_offsets) = layOutDynConstr this_pkg con (addIdReps args) + -- The binding below forces the masking out of the tag bits + -- when accessing the constructor field. + bind_arg (arg, offset) = bindNewToUntagNode arg offset (mkLFArgument arg) (tagForCon con) + (_, args_w_offsets) = layOutDynConstr con (addIdReps args) -- ASSERT(not (isUnboxedTupleCon con)) return () mapCs bind_arg args_w_offsets @@ -304,7 +304,7 @@ cgReturnDataCon con amodes = ASSERT( amodes `lengthIs` dataConRepArity con ) do { EndOfBlockInfo _ sequel <- getEndOfBlockInfo ; case sequel of - CaseAlts _ (Just (alts, deflt_lbl)) bndr _ + CaseAlts _ (Just (alts, deflt_lbl)) bndr -> -- Ho! We know the constructor so we can -- go straight to the right alternative case assocMaybe alts (dataConTagZ con) of { @@ -326,7 +326,7 @@ cgReturnDataCon con amodes other_sequel -- The usual case | isUnboxedTupleCon con -> returnUnboxedTuple amodes - | otherwise -> build_it_then (emitKnownConReturnCode con) + | otherwise -> build_it_then emitReturnInstr } where jump_to lbl = stmtC (CmmJump (CmmLit lbl) []) @@ -395,11 +395,15 @@ cgTyCon tycon -- Put the table after the data constructor decls, because the -- datatype closure table (for enumeration types) -- to (say) PrelBase_$wTrue_closure, which is defined in code_stuff + -- Note that the closure pointers are tagged. + + -- XXX comment says to put table after constructor decls, but + -- code appears to put it before --- NR 16 Aug 2007 ; extra <- if isEnumerationTyCon tycon then do tbl <- getCmm (emitRODataLits (mkLocalClosureTableLabel (tyConName tycon)) - [ CmmLabel (mkLocalClosureLabel (dataConName con)) + [ CmmLabelOff (mkLocalClosureLabel (dataConName con)) (tagForCon con) | con <- tyConDataCons tycon]) return [tbl] else @@ -416,7 +420,6 @@ static closure, for a constructor. cgDataCon :: DataCon -> Code cgDataCon data_con = do { -- Don't need any dynamic closure code for zero-arity constructors - this_pkg <- getThisPackage ; let -- To allow the debuggers, interpreters, etc to cope with @@ -424,10 +427,10 @@ cgDataCon data_con -- time), we take care that info-table contains the -- information we need. (static_cl_info, _) = - layOutStaticConstr this_pkg data_con arg_reps + layOutStaticConstr data_con arg_reps (dyn_cl_info, arg_things) = - layOutDynConstr this_pkg data_con arg_reps + layOutDynConstr data_con arg_reps emit_info cl_info ticky_code = do { code_blks <- getCgStmts the_code @@ -443,7 +446,10 @@ cgDataCon data_con body_code = do { -- NB: We don't set CC when entering data (WDP 94/06) tickyReturnOldCon (length arg_things) - ; performReturn (emitKnownConReturnCode data_con) } + -- The case continuation code is expecting a tagged pointer + ; stmtC (CmmAssign nodeReg + (tagCons data_con (CmmReg nodeReg))) + ; performReturn emitReturnInstr } -- noStmts: Ptr to thing already in Node ; whenC (not (isNullaryRepDataCon data_con)) @@ -451,6 +457,4 @@ cgDataCon data_con -- Dynamic-Closure first, to reduce forward references ; emit_info static_cl_info tickyEnterStaticCon } - - where \end{code}