This is now a sort-of-normal STG-to-STG pass (WDP 94/06), run by stg2stg.
-* Traverses the STG program collecting the cost centres. These are
- required to declare the cost centres at the start of code
- generation.
+ - Traverses the STG program collecting the cost centres. These are required
+ to declare the cost centres at the start of code generation.
- Note: because of cross-module unfolding, some of these cost centres
- may be from other modules. But will still have to give them
- "extern" declarations.
+ Note: because of cross-module unfolding, some of these cost centres may be
+ from other modules. But will still have to give them "extern"
+ declarations.
-* Puts on CAF cost-centres if the user has asked for individual CAF
- cost-centres.
+ - Puts on CAF cost-centres if the user has asked for individual CAF
+ cost-centres.
-* Ditto for individual DICT cost-centres.
+ - Ditto for individual DICT cost-centres.
-* Boxes top-level inherited functions passed as arguments.
+ - Boxes top-level inherited functions passed as arguments.
-* "Distributes" given cost-centres to all as-yet-unmarked RHSs.
+ - "Distributes" given cost-centres to all as-yet-unmarked RHSs.
\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 SCCfinal ( stgMassageForProfiling ) where
#include "HsVersions.h"
import StgSyn
-import StaticFlags ( opt_AutoSccsOnIndividualCafs )
-import CostCentre -- lots of things
+import CostCentre -- lots of things
import Id
import Name
import Module
-import UniqSupply ( splitUniqSupply, UniqSupply )
+import UniqSupply ( splitUniqSupply, UniqSupply )
#ifdef PROF_DO_BOXING
-import UniqSupply ( uniqFromSupply )
+import UniqSupply ( uniqFromSupply )
#endif
import VarSet
-import ListSetOps ( removeDups )
+import ListSetOps ( removeDups )
import Outputable
+import DynFlags
\end{code}
\begin{code}
stgMassageForProfiling
- :: PackageId
- -> Module -- module name
- -> UniqSupply -- unique supply
- -> [StgBinding] -- input
- -> (CollectedCCs, [StgBinding])
-
-stgMassageForProfiling this_pkg mod_name us stg_binds
+ :: DynFlags
+ -> PackageId
+ -> Module -- module name
+ -> UniqSupply -- unique supply
+ -> [StgBinding] -- input
+ -> (CollectedCCs, [StgBinding])
+
+stgMassageForProfiling dflags this_pkg mod_name us stg_binds
= let
- ((local_ccs, extern_ccs, cc_stacks),
- stg_binds2)
- = initMM mod_name us (do_top_bindings stg_binds)
-
- (fixed_ccs, fixed_cc_stacks)
- = if opt_AutoSccsOnIndividualCafs
- then ([],[]) -- don't need "all CAFs" CC
- -- (for Prelude, we use PreludeCC)
- else ([all_cafs_cc], [all_cafs_ccs])
-
- local_ccs_no_dups = fst (removeDups cmpCostCentre local_ccs)
- extern_ccs_no_dups = fst (removeDups cmpCostCentre extern_ccs)
+ ((local_ccs, extern_ccs, cc_stacks),
+ stg_binds2)
+ = initMM mod_name us (do_top_bindings stg_binds)
+
+ (fixed_ccs, fixed_cc_stacks)
+ = if dopt Opt_AutoSccsOnIndividualCafs dflags
+ then ([],[]) -- don't need "all CAFs" CC
+ -- (for Prelude, we use PreludeCC)
+ else ([all_cafs_cc], [all_cafs_ccs])
+
+ local_ccs_no_dups = fst (removeDups cmpCostCentre local_ccs)
+ extern_ccs_no_dups = fst (removeDups cmpCostCentre extern_ccs)
in
- ((fixed_ccs ++ local_ccs_no_dups,
- extern_ccs_no_dups,
+ ((fixed_ccs ++ local_ccs_no_dups,
+ extern_ccs_no_dups,
fixed_cc_stacks ++ cc_stacks), stg_binds2)
where
----------
do_top_rhs :: Id -> StgRhs -> MassageM StgRhs
- do_top_rhs binder (StgRhsClosure _ bi fv u srt [] (StgSCC cc (StgConApp con args)))
+ do_top_rhs _ (StgRhsClosure _ _ _ _ _ [] (StgSCC cc (StgConApp con args)))
| not (isSccCountCostCentre cc) && not (isDllConApp this_pkg con args)
- -- Trivial _scc_ around nothing but static data
- -- Eliminate _scc_ ... and turn into StgRhsCon
+ -- Trivial _scc_ around nothing but static data
+ -- Eliminate _scc_ ... and turn into StgRhsCon
- -- isDllConApp checks for LitLit args too
+ -- isDllConApp checks for LitLit args too
= return (StgRhsCon dontCareCCS con args)
{- Can't do this one with cost-centre stacks: --SDM
do_top_rhs binder (StgRhsClosure no_cc bi fv u [] (StgSCC ty cc expr))
| (noCCSAttached no_cc || currentOrSubsumedCCS no_cc)
&& not (isSccCountCostCentre cc)
- -- Top level CAF without a cost centre attached
- -- Attach and collect cc of trivial _scc_ in body
+ -- Top level CAF without a cost centre attached
+ -- Attach and collect cc of trivial _scc_ in body
= do collectCC cc
expr' <- set_prevailing_cc cc (do_expr expr)
return (StgRhsClosure cc bi fv u [] expr')
| noCCSAttached no_cc || currentOrSubsumedCCS no_cc = do
-- Top level CAF without a cost centre attached
-- Attach CAF cc (collect if individual CAF ccs)
- caf_ccs <- if opt_AutoSccsOnIndividualCafs
+ caf_ccs <- if dopt Opt_AutoSccsOnIndividualCafs dflags
then let cc = mkAutoCC binder modl CafCC
ccs = mkSingletonCCS cc
-- careful: the binder might be :Main.main,
body' <- set_prevailing_cc caf_ccs (do_expr body)
return (StgRhsClosure caf_ccs bi fv u srt [] body')
- do_top_rhs binder (StgRhsClosure cc bi fv u srt [] body)
- -- Top level CAF with cost centre attached
- -- Should this be a CAF cc ??? Does this ever occur ???
+ do_top_rhs _ (StgRhsClosure cc _ _ _ _ [] _)
+ -- Top level CAF with cost centre attached
+ -- Should this be a CAF cc ??? Does this ever occur ???
= pprPanic "SCCfinal: CAF with cc:" (ppr cc)
- do_top_rhs binder (StgRhsClosure no_ccs bi fv u srt args body)
- -- Top level function, probably subsumed
+ do_top_rhs _ (StgRhsClosure no_ccs bi fv u srt args body)
+ -- Top level function, probably subsumed
| noCCSAttached no_ccs
= do body' <- set_lambda_cc (do_expr body)
return (StgRhsClosure subsumedCCS bi fv u srt args body')
| otherwise
= pprPanic "SCCfinal: CAF with cc:" (ppr no_ccs)
- do_top_rhs binder (StgRhsCon ccs con args)
- -- Top-level (static) data is not counted in heap
- -- profiles; nor do we set CCCS from it; so we
- -- just slam in dontCareCostCentre
+ do_top_rhs _ (StgRhsCon _ con args)
+ -- Top-level (static) data is not counted in heap
+ -- profiles; nor do we set CCCS from it; so we
+ -- just slam in dontCareCostCentre
= return (StgRhsCon dontCareCCS con args)
------
do_expr (StgOpApp con args res_ty)
= boxHigherOrderArgs (\args -> StgOpApp con args res_ty) args
- do_expr (StgSCC cc expr) = do -- Ha, we found a cost centre!
+ do_expr (StgSCC cc expr) = do -- Ha, we found a cost centre!
collectCC cc
expr' <- do_expr expr
return (StgSCC cc expr')
expr' <- do_expr expr
return (StgTick m n expr')
-#ifdef DEBUG
do_expr other = pprPanic "SCCfinal.do_expr" (ppr other)
-#endif
----------------------------------
----------------------------------
do_rhs :: StgRhs -> MassageM StgRhs
- -- We play much the same game as we did in do_top_rhs above;
- -- but we don't have to worry about cafs etc.
+ -- We play much the same game as we did in do_top_rhs above;
+ -- but we don't have to worry about cafs etc.
{-
do_rhs (StgRhsClosure closure_cc bi fv u [] (StgSCC ty cc (StgCon (DataCon con) args _)))
| not (isSccCountCostCentre cc)
= do collectCC cc
- return (StgRhsCon cc con args)
+ return (StgRhsCon cc con args)
-}
do_rhs (StgRhsClosure _ bi fv u srt args expr) = do
expr'' <- do_expr expr'
return (StgRhsClosure ccs bi fv u srt args expr'')
where
- slurpSCCs ccs (StgSCC cc e)
+ slurpSCCs ccs (StgSCC cc e)
= do collectCC cc
slurpSCCs (cc `pushCCOnCCS` ccs) e
- slurpSCCs ccs e
- = return (e, ccs)
+ slurpSCCs ccs e
+ = return (e, ccs)
- do_rhs (StgRhsCon cc con args)
+ do_rhs (StgRhsCon _ con args)
= return (StgRhsCon currentCCS con args)
\end{code}
%************************************************************************
-%* *
+%* *
\subsection{Boxing higher-order args}
-%* *
+%* *
%************************************************************************
Boxing is *turned off* at the moment, until we can figure out how to
\begin{code}
boxHigherOrderArgs
:: ([StgArg] -> StgExpr)
- -- An application lacking its arguments
- -> [StgArg] -- arguments which we might box
+ -- An application lacking its arguments
+ -> [StgArg] -- arguments which we might box
-> MassageM StgExpr
#ifndef PROF_DO_BOXING
---------------
do_arg ids bindings arg@(StgVarArg old_var)
- | (not (isLocalVar old_var) || elemVarSet old_var ids)
- && isFunTy (dropForAlls var_type)
+ | (not (isLocalVar old_var) || elemVarSet old_var ids)
+ && isFunTy (dropForAlls var_type)
= do -- make a trivial let-binding for the top-level function
- uniq <- getUniqueMM
- let
- new_var = mkSysLocal FSLIT("sf") uniq var_type
- return ( (new_var, old_var) : bindings, StgVarArg new_var )
+ uniq <- getUniqueMM
+ let
+ new_var = mkSysLocal (fsLit "sf") uniq var_type
+ return ( (new_var, old_var) : bindings, StgVarArg new_var )
where
- var_type = idType old_var
+ var_type = idType old_var
do_arg ids bindings arg = return (bindings, arg)
mk_stg_let cc (new_var, old_var) body
= let
- rhs_body = StgApp old_var [{-args-}]
- rhs_closure = StgRhsClosure cc stgArgOcc [{-fvs-}] ReEntrant NoSRT{-eeek!!!-} [{-args-}] rhs_body
+ rhs_body = StgApp old_var [{-args-}]
+ rhs_closure = StgRhsClosure cc stgArgOcc [{-fvs-}] ReEntrant NoSRT{-eeek!!!-} [{-args-}] rhs_body
in
- StgLet (StgNonRec new_var rhs_closure) body
+ StgLet (StgNonRec new_var rhs_closure) body
where
- bOGUS_LVs = emptyUniqSet -- easier to print than: panic "mk_stg_let: LVs"
+ bOGUS_LVs = emptyUniqSet -- easier to print than: panic "mk_stg_let: LVs"
#endif
\end{code}
%************************************************************************
-%* *
+%* *
\subsection{Boring monad stuff for this}
-%* *
+%* *
%************************************************************************
\begin{code}
-- the initMM function also returns the final CollectedCCs
-initMM :: Module -- module name, which we may consult
+initMM :: Module -- module name, which we may consult
-> UniqSupply
-> MassageM a
-> (CollectedCCs, a)
addTopLevelIshIds :: [Id] -> MassageM a -> MassageM a
addTopLevelIshIds [] cont = cont
-addTopLevelIshIds (id:ids) cont
+addTopLevelIshIds (id:ids) cont
= addTopLevelIshId id (addTopLevelIshIds ids cont)
+#ifdef PROF_DO_BOXING
getTopLevelIshIds :: MassageM VarSet
-getTopLevelIshIds = MassageM $ \mod scope_cc us ids ccs -> (ccs, ids)
+getTopLevelIshIds = MassageM $ \_mod _scope_cc _us ids ccs -> (ccs, ids)
+#endif
\end{code}
The prevailing CCS is used to tell whether we're in a top-levelish
\begin{code}
set_lambda_cc :: MassageM a -> MassageM a
set_lambda_cc action
- = MassageM $ \mod scope_cc us ids ccs
+ = MassageM $ \mod _scope_cc us ids ccs
-> unMassageM action mod currentCCS us ids ccs
set_prevailing_cc :: CostCentreStack -> MassageM a -> MassageM a
set_prevailing_cc cc_to_set_to action
- = MassageM $ \mod scope_cc us ids ccs
+ = MassageM $ \mod _scope_cc us ids ccs
-> unMassageM action mod cc_to_set_to us ids ccs
-
-get_prevailing_cc :: MassageM CostCentreStack
-get_prevailing_cc = MassageM $ \mod scope_cc us ids ccs -> (ccs, scope_cc)
\end{code}
\begin{code}
collectCC :: CostCentre -> MassageM ()
-collectCC cc = MassageM $ \mod_name scope_cc us ids (local_ccs, extern_ccs, ccss)
+collectCC cc
+ = MassageM $ \mod_name _scope_cc _us _ids (local_ccs, extern_ccs, ccss)
-> ASSERT(not (noCCAttached cc))
if (cc `ccFromThisModule` mod_name) then
- ((cc : local_ccs, extern_ccs, ccss), ())
+ ((cc : local_ccs, extern_ccs, ccss), ())
else -- must declare it "extern"
- ((local_ccs, cc : extern_ccs, ccss), ())
+ ((local_ccs, cc : extern_ccs, ccss), ())
-- Version of collectCC used when we definitely want to declare this
-- CC as local, even if its module name is not the same as the current
--- module name (eg. the special :Main module) see bug #249, #1472,
+-- module name (eg. the special :Main module) see bug #249, #1472,
-- test prof001,prof002.
collectNewCC :: CostCentre -> MassageM ()
-collectNewCC cc = MassageM $ \mod_name scope_cc us ids (local_ccs, extern_ccs, ccss)
- -> ((cc : local_ccs, extern_ccs, ccss), ())
+collectNewCC cc
+ = MassageM $ \_mod_name _scope_cc _us _ids (local_ccs, extern_ccs, ccss)
+ -> ((cc : local_ccs, extern_ccs, ccss), ())
collectCCS :: CostCentreStack -> MassageM ()
-collectCCS ccs = MassageM $ \mod_name scope_cc us ids (local_ccs, extern_ccs, ccss)
- -> ASSERT(not (noCCSAttached ccs))
- ((local_ccs, extern_ccs, ccs : ccss), ())
+collectCCS ccs
+ = MassageM $ \_mod_name _scope_cc _us _ids (local_ccs, extern_ccs, ccss)
+ -> ASSERT(not (noCCSAttached ccs))
+ ((local_ccs, extern_ccs, ccs : ccss), ())
\end{code}
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