%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
%
\section[SimplCore]{Driver for simplifying @Core@ programs}
\begin{code}
#include "HsVersions.h"
-module SimplCore (
- core2core
- ) where
+module SimplCore ( core2core ) where
-import Type ( getTyConDataCons )
---SAVE:import ArityAnal ( arityAnalProgram )
-import Bag
-import BinderInfo ( BinderInfo) -- instances only
+IMP_Ubiq(){-uitous-}
+IMPORT_1_3(IO(hPutStr,stderr))
+
+import AnalFBWW ( analFBWW )
+import Bag ( isEmptyBag, foldBag )
+import BinderInfo ( BinderInfo{-instance Outputable-} )
import CgCompInfo ( uNFOLDING_CREATION_THRESHOLD,
uNFOLDING_USE_THRESHOLD,
uNFOLDING_OVERRIDE_THRESHOLD,
uNFOLDING_CON_DISCOUNT_WEIGHT
)
-import CmdLineOpts
+import CmdLineOpts ( CoreToDo(..), SimplifierSwitch(..), switchIsOn,
+ opt_D_show_passes,
+ opt_D_simplifier_stats,
+ opt_D_verbose_core2core,
+ opt_DoCoreLinting,
+ opt_FoldrBuildOn,
+ opt_ReportWhyUnfoldingsDisallowed,
+ opt_ShowImportSpecs,
+ opt_UnfoldingCreationThreshold,
+ opt_UnfoldingOverrideThreshold,
+ opt_UnfoldingUseThreshold
+ )
import CoreLint ( lintCoreBindings )
+import CoreSyn
+import CoreUnfold
+import CoreUtils ( substCoreBindings )
+import ErrUtils ( ghcExit )
+import FiniteMap ( FiniteMap )
import FloatIn ( floatInwards )
import FloatOut ( floatOutwards )
-import Id ( getIdUnfolding,
- idType, toplevelishId,
- idWantsToBeINLINEd,
+import FoldrBuildWW ( mkFoldrBuildWW )
+import Id ( idType, toplevelishId, idWantsToBeINLINEd,
unfoldingUnfriendlyId, isWrapperId,
- mkTemplateLocals
+ nullIdEnv, addOneToIdEnv, delOneFromIdEnv,
+ lookupIdEnv, SYN_IE(IdEnv),
+ GenId{-instance Outputable-}
)
-import IdInfo
+import IdInfo ( mkUnfolding )
import LiberateCase ( liberateCase )
-import MainMonad
-import Maybes
+import MagicUFs ( MagicUnfoldingFun )
+import Maybes ( maybeToBool )
+import Outputable ( Outputable(..){-instance * (,) -} )
+import PprCore
+import PprStyle ( PprStyle(..) )
+import PprType ( GenType{-instance Outputable-}, GenTyVar{-ditto-} )
+import Pretty ( ppShow, ppAboves, ppAbove, ppCat, ppStr )
import SAT ( doStaticArgs )
-import SCCauto
---ANDY:
---import SimplHaskell ( coreToHaskell )
-import SimplMonad ( zeroSimplCount, showSimplCount, TickType, SimplCount )
+import SimplMonad ( zeroSimplCount, showSimplCount, SimplCount )
import SimplPgm ( simplifyPgm )
-import SimplVar ( leastItCouldCost )
import Specialise
import SpecUtils ( pprSpecErrs )
import StrictAnal ( saWwTopBinds )
-import FoldrBuildWW
-import AnalFBWW
+import TyVar ( nullTyVarEnv, GenTyVar{-instance Eq-} )
+import Unique ( Unique{-instance Eq-} )
+import UniqSupply ( splitUniqSupply )
+import Util ( panic{-ToDo:rm-} )
+
#if ! OMIT_DEFORESTER
import Deforest ( deforestProgram )
import DefUtils ( deforestable )
#endif
-import UniqSupply
-import Util
+
+isWrapperFor = panic "SimplCore.isWrapperFor (ToDo)"
\end{code}
\begin{code}
core2core :: [CoreToDo] -- spec of what core-to-core passes to do
- -> (GlobalSwitch->SwitchResult)-- "global" command-line info lookup fn
-> FAST_STRING -- module name (profiling only)
-> PprStyle -- printing style (for debugging only)
-> UniqSupply -- a name supply
-> [TyCon] -- local data tycons and tycon specialisations
-> FiniteMap TyCon [(Bool, [Maybe Type])]
-> [CoreBinding] -- input...
- -> MainIO
+ -> IO
([CoreBinding], -- results: program, plus...
- IdEnv UnfoldingDetails, -- unfoldings to be exported from here
+ IdEnv Unfolding, -- unfoldings to be exported from here
SpecialiseData) -- specialisation data
-core2core core_todos sw_chkr module_name ppr_style us local_tycons tycon_specs binds
- = BSCC("Core2Core")
- if null core_todos then -- very rare, I suspect...
+core2core core_todos module_name ppr_style us local_tycons tycon_specs binds
+ = if null core_todos then -- very rare, I suspect...
-- well, we still must do some renumbering
- returnMn (
- (snd (instCoreBindings (mkUniqueSupplyGrimily us) binds), nullIdEnv, init_specdata)
+ return (
+ (substCoreBindings nullIdEnv nullTyVarEnv binds us,
+ nullIdEnv,
+ init_specdata)
)
else
(if do_verbose_core2core then
- writeMn stderr "VERBOSE CORE-TO-CORE:\n"
- else returnMn ()) `thenMn_`
+ hPutStr stderr "VERBOSE CORE-TO-CORE:\n"
+ else return ()) >>
-- better do the main business
foldl_mn do_core_pass
(binds, us, nullIdEnv, init_specdata, zeroSimplCount)
core_todos
- `thenMn` \ (processed_binds, _, inline_env, spec_data, simpl_stats) ->
-
- (if switch_is_on D_simplifier_stats
- then writeMn stderr ("\nSimplifier Stats:\n")
- `thenMn_`
- writeMn stderr (showSimplCount simpl_stats)
- `thenMn_`
- writeMn stderr "\n"
- else returnMn ()
- ) `thenMn_`
-
- returnMn (processed_binds, inline_env, spec_data)
- ESCC
+ >>= \ (processed_binds, _, inline_env, spec_data, simpl_stats) ->
+
+ (if opt_D_simplifier_stats
+ then hPutStr stderr ("\nSimplifier Stats:\n")
+ >>
+ hPutStr stderr (showSimplCount simpl_stats)
+ >>
+ hPutStr stderr "\n"
+ else return ()
+ ) >>
+
+ return (processed_binds, inline_env, spec_data)
where
init_specdata = initSpecData local_tycons tycon_specs
- switch_is_on = switchIsOn sw_chkr
-
- do_verbose_core2core = switch_is_on D_verbose_core2core
+ do_verbose_core2core = opt_D_verbose_core2core
lib_case_threshold -- ToDo: HACK HACK HACK : FIX ME FIX ME FIX ME
-- Use 4x a known threshold
- = case (intSwitchSet sw_chkr UnfoldingOverrideThreshold) of
+ = case opt_UnfoldingOverrideThreshold of
Nothing -> 4 * uNFOLDING_USE_THRESHOLD
Just xx -> 4 * xx
-------------
- core_linter = if switch_is_on DoCoreLinting
+ core_linter = if opt_DoCoreLinting
then lintCoreBindings ppr_style
else ( \ whodunnit spec_done binds -> binds )
in
case to_do of
CoreDoSimplify simpl_sw_chkr
- -> BSCC("CoreSimplify")
+ -> _scc_ "CoreSimplify"
begin_pass ("Simplify" ++ if switchIsOn simpl_sw_chkr SimplDoFoldrBuild
- then " (foldr/build)" else "") `thenMn_`
- case (simplifyPgm binds sw_chkr simpl_sw_chkr simpl_stats us1) of
+ then " (foldr/build)" else "") >>
+ case (simplifyPgm binds simpl_sw_chkr simpl_stats us1) of
(p, it_cnt, simpl_stats2)
-> end_pass False us2 p inline_env spec_data simpl_stats2
("Simplify (" ++ show it_cnt ++ ")"
++ if switchIsOn simpl_sw_chkr SimplDoFoldrBuild
then " foldr/build" else "")
- ESCC
CoreDoFoldrBuildWorkerWrapper
- -> BSCC("CoreDoFoldrBuildWorkerWrapper")
- begin_pass "FBWW" `thenMn_`
- case (mkFoldrBuildWW switch_is_on us1 binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "FBWW"
- } ESCC
+ -> _scc_ "CoreDoFoldrBuildWorkerWrapper"
+ begin_pass "FBWW" >>
+ case (mkFoldrBuildWW us1 binds) of { binds2 ->
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "FBWW" }
CoreDoFoldrBuildWWAnal
- -> BSCC("CoreDoFoldrBuildWWAnal")
- begin_pass "AnalFBWW" `thenMn_`
- case (analFBWW switch_is_on binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "AnalFBWW"
- } ESCC
+ -> _scc_ "CoreDoFoldrBuildWWAnal"
+ begin_pass "AnalFBWW" >>
+ case (analFBWW binds) of { binds2 ->
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "AnalFBWW" }
CoreLiberateCase
- -> BSCC("LiberateCase")
- begin_pass "LiberateCase" `thenMn_`
+ -> _scc_ "LiberateCase"
+ begin_pass "LiberateCase" >>
case (liberateCase lib_case_threshold binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "LiberateCase"
- } ESCC
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "LiberateCase" }
CoreDoCalcInlinings1 -- avoid inlinings w/ cost-centres
- -> BSCC("CoreInlinings1")
- begin_pass "CalcInlinings" `thenMn_`
- case (calcInlinings False sw_chkr inline_env binds) of { inline_env2 ->
- end_pass False us2 binds inline_env2 spec_data simpl_stats "CalcInlinings"
- } ESCC
+ -> _scc_ "CoreInlinings1"
+ begin_pass "CalcInlinings" >>
+ case (calcInlinings False inline_env binds) of { inline_env2 ->
+ end_pass False us2 binds inline_env2 spec_data simpl_stats "CalcInlinings" }
CoreDoCalcInlinings2 -- allow inlinings w/ cost-centres
- -> BSCC("CoreInlinings2")
- begin_pass "CalcInlinings" `thenMn_`
- case (calcInlinings True sw_chkr inline_env binds) of { inline_env2 ->
- end_pass False us2 binds inline_env2 spec_data simpl_stats "CalcInlinings"
- } ESCC
+ -> _scc_ "CoreInlinings2"
+ begin_pass "CalcInlinings" >>
+ case (calcInlinings True inline_env binds) of { inline_env2 ->
+ end_pass False us2 binds inline_env2 spec_data simpl_stats "CalcInlinings" }
CoreDoFloatInwards
- -> BSCC("FloatInwards")
- begin_pass "FloatIn" `thenMn_`
+ -> _scc_ "FloatInwards"
+ begin_pass "FloatIn" >>
case (floatInwards binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "FloatIn"
- } ESCC
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "FloatIn" }
CoreDoFullLaziness
- -> BSCC("CoreFloating")
- begin_pass "FloatOut" `thenMn_`
- case (floatOutwards switch_is_on us1 binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "FloatOut"
- } ESCC
+ -> _scc_ "CoreFloating"
+ begin_pass "FloatOut" >>
+ case (floatOutwards us1 binds) of { binds2 ->
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "FloatOut" }
CoreDoStaticArgs
- -> BSCC("CoreStaticArgs")
- begin_pass "StaticArgs" `thenMn_`
+ -> _scc_ "CoreStaticArgs"
+ begin_pass "StaticArgs" >>
case (doStaticArgs binds us1) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "StaticArgs"
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "StaticArgs" }
-- Binds really should be dependency-analysed for static-
-- arg transformation... Not to worry, they probably are.
-- (I don't think it *dies* if they aren't [WDP 94/04/15])
- } ESCC
CoreDoStrictness
- -> BSCC("CoreStranal")
- begin_pass "StrAnal" `thenMn_`
- case (saWwTopBinds us1 switch_is_on binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "StrAnal"
- } ESCC
+ -> _scc_ "CoreStranal"
+ begin_pass "StrAnal" >>
+ case (saWwTopBinds us1 binds) of { binds2 ->
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "StrAnal" }
CoreDoSpecialising
- -> BSCC("Specialise")
- begin_pass "Specialise" `thenMn_`
- case (specProgram switch_is_on us1 binds spec_data) of {
+ -> _scc_ "Specialise"
+ begin_pass "Specialise" >>
+ case (specProgram us1 binds spec_data) of {
(p, spec_data2@(SpecData _ spec_noerrs _ _ _
spec_errs spec_warn spec_tyerrs)) ->
-- if we got errors, we die straight away
(if not spec_noerrs ||
- (switch_is_on ShowImportSpecs && not (isEmptyBag spec_warn)) then
- writeMn stderr (ppShow 1000 {-pprCols-}
+ (opt_ShowImportSpecs && not (isEmptyBag spec_warn)) then
+ hPutStr stderr (ppShow 1000 {-pprCols-}
(pprSpecErrs module_name spec_errs spec_warn spec_tyerrs))
- `thenMn_` writeMn stderr "\n"
+ >> hPutStr stderr "\n"
else
- returnMn ()) `thenMn_`
+ return ()) >>
(if not spec_noerrs then -- Stop here if specialisation errors occured
- exitMn 1
+ ghcExit 1
else
- returnMn ()) `thenMn_`
+ return ()) >>
end_pass False us2 p inline_env spec_data2 simpl_stats "Specialise"
}
- ESCC
CoreDoDeforest
#if OMIT_DEFORESTER
-> error "ERROR: CoreDoDeforest: not built into compiler\n"
#else
- -> BSCC("Deforestation")
- begin_pass "Deforestation" `thenMn_`
- case (deforestProgram sw_chkr binds us1) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "Deforestation"
- }
- ESCC
+ -> _scc_ "Deforestation"
+ begin_pass "Deforestation" >>
+ case (deforestProgram binds us1) of { binds2 ->
+ end_pass False us2 binds2 inline_env spec_data simpl_stats "Deforestation" }
#endif
- CoreDoAutoCostCentres
- -> BSCC("AutoSCCs")
- begin_pass "AutoSCCs" `thenMn_`
- case (addAutoCostCentres sw_chkr module_name binds) of { binds2 ->
- end_pass False us2 binds2 inline_env spec_data simpl_stats "AutoSCCs"
- }
- ESCC
-
CoreDoPrintCore -- print result of last pass
-> end_pass True us2 binds inline_env spec_data simpl_stats "Print"
-
-------------------------------------------------
begin_pass
- = if switch_is_on D_show_passes
- then \ what -> writeMn stderr ("*** Core2Core: "++what++"\n")
- else \ what -> returnMn ()
+ = if opt_D_show_passes
+ then \ what -> hPutStr stderr ("*** Core2Core: "++what++"\n")
+ else \ what -> return ()
end_pass print us2 binds2 inline_env2
spec_data2@(SpecData spec_done _ _ _ _ _ _ _)
(if (do_verbose_core2core && not print) ||
(print && not do_verbose_core2core)
then
- writeMn stderr ("\n*** "++what++":\n")
- `thenMn_`
- writeMn stderr (ppShow 1000
- (ppAboves (map (pprPlainCoreBinding ppr_style) binds2)))
- `thenMn_`
- writeMn stderr "\n"
+ hPutStr stderr ("\n*** "++what++":\n")
+ >>
+ hPutStr stderr (ppShow 1000
+ (ppAboves (map (pprCoreBinding ppr_style) binds2)))
+ >>
+ hPutStr stderr "\n"
else
- returnMn ()) `thenMn_`
+ return ()) >>
let
linted_binds = core_linter what spec_done binds2
in
- returnMn
+ return
(linted_binds, -- processed binds, possibly run thru CoreLint
us2, -- UniqueSupply for the next guy
inline_env2, -- possibly-updated inline env
)
-- here so it can be inlined...
-foldl_mn f z [] = returnMn z
-foldl_mn f z (x:xs) = f z x `thenMn` \ zz ->
+foldl_mn f z [] = return z
+foldl_mn f z (x:xs) = f z x >>= \ zz ->
foldl_mn f zz xs
\end{code}
\begin{code}
calcInlinings :: Bool -- True => inlinings with _scc_s are OK
- -> (GlobalSwitch -> SwitchResult)
- -> IdEnv UnfoldingDetails
+ -> IdEnv Unfolding
-> [CoreBinding]
- -> IdEnv UnfoldingDetails
+ -> IdEnv Unfolding
-calcInlinings scc_s_OK sw_chkr inline_env_so_far top_binds
+calcInlinings scc_s_OK inline_env_so_far top_binds
= let
result = foldl calci inline_env_so_far top_binds
in
pp_item (binder, details)
= ppCat [ppr PprDebug binder, ppStr "=>", pp_det details]
where
- pp_det NoUnfoldingDetails = ppStr "_N_"
- pp_det (IWantToBeINLINEd _) = ppStr "INLINE"
- pp_det (GenForm _ _ expr guide)
+ pp_det NoUnfolding = ppStr "_N_"
+--LATER: pp_det (IWantToBeINLINEd _) = ppStr "INLINE"
+ pp_det (CoreUnfolding (SimpleUnfolding _ guide expr))
= ppAbove (ppr PprDebug guide) (ppr PprDebug expr)
pp_det other = ppStr "???"
------------
- switch_is_on = switchIsOn sw_chkr
-
- my_trace = if (switch_is_on ReportWhyUnfoldingsDisallowed)
+ my_trace = if opt_ReportWhyUnfoldingsDisallowed
then trace
else \ msg stuff -> stuff
(unfolding_creation_threshold, explicit_creation_threshold)
- = case (intSwitchSet sw_chkr UnfoldingCreationThreshold) of
+ = case opt_UnfoldingCreationThreshold of
Nothing -> (uNFOLDING_CREATION_THRESHOLD, False)
Just xx -> (xx, True)
unfold_use_threshold
- = case (intSwitchSet sw_chkr UnfoldingUseThreshold) of
+ = case opt_UnfoldingUseThreshold of
Nothing -> uNFOLDING_USE_THRESHOLD
Just xx -> xx
unfold_override_threshold
- = case (intSwitchSet sw_chkr UnfoldingOverrideThreshold) of
+ = case opt_UnfoldingOverrideThreshold of
Nothing -> uNFOLDING_OVERRIDE_THRESHOLD
Just xx -> xx
| rhs_mentions_an_unmentionable
|| (not explicit_INLINE_requested
- && (rhs_looks_like_a_caf || guidance_says_don't || guidance_size_too_big))
+ && (rhs_looks_like_a_caf || guidance_size_too_big))
= let
my_my_trace
= if explicit_INLINE_requested
which = if scc_s_OK then " (late):" else " (early):"
in
- --pprTrace "giving up on size:" (ppCat [ppr PprDebug binder, ppr PprDebug
- -- [rhs_mentions_an_unmentionable, explicit_INLINE_requested,
- -- rhs_looks_like_a_caf, guidance_says_don't, guidance_size_too_big]]) (
my_my_trace ("unfolding disallowed for"++which++(ppShow 80 (ppr PprDebug binder))) (
ignominious_defeat
)
- --)
| rhs `isWrapperFor` binder
-- Don't add an explicit "unfolding"; let the worker/wrapper
-- stuff do its thing. INLINE things don't get w/w'd, so
-- they will be OK.
- = --pprTrace "giving up on isWrapperFor:" (ppr PprDebug binder)
- ignominious_defeat
+ = ignominious_defeat
#if ! OMIT_DEFORESTER
-- For the deforester: bypass the barbed wire for recursive
guidance_size
= case guidance of
UnfoldAlways -> 0 -- *extremely* small
- EssentialUnfolding -> 0 -- ditto
UnfoldIfGoodArgs _ _ _ size -> size
- guidance_says_don't = case guidance of { UnfoldNever -> True; _ -> False }
-
guidance_size_too_big
-- Does the guidance suggest that this unfolding will
-- be of no use *no matter* the arguments given to it?
-- Could be more sophisticated...
- = case guidance of
- UnfoldAlways -> False
- EssentialUnfolding -> False
- UnfoldIfGoodArgs _ no_val_args arg_info_vec size
-
- -> if explicit_creation_threshold then
- False -- user set threshold; don't second-guess...
-
- else if no_val_args == 0 && rhs_looks_like_a_data_val then
- False -- we'd like a top-level data constr to be
- -- visible even if it is never unfolded
- else
- let
- cost
- = leastItCouldCost con_discount_weight size no_val_args
- arg_info_vec rhs_arg_tys
- in
--- (if (unfold_use_threshold < cost) then (pprTrace "cost:" (ppInt cost)) else \x->x ) (
- unfold_use_threshold < cost
--- )
+ = not (couldBeSmallEnoughToInline con_discount_weight unfold_use_threshold guidance)
- rhs_looks_like_a_caf = not (manifestlyWHNF rhs)
+ rhs_looks_like_a_caf = not (whnfOrBottom rhs)
rhs_looks_like_a_data_val
= case (collectBinders rhs) of
- (_, _, [], Con _ _ _) -> True
- other -> False
+ (_, _, [], Con _ _) -> True
+ other -> False
rhs_arg_tys
= case (collectBinders rhs) of
= mentionedInUnfolding (\x -> x) rhs
rhs_mentions_an_unmentionable
- = --pprTrace "mentions:" (ppCat [ppr PprDebug binder, ppr PprDebug [(i,unfoldingUnfriendlyId i) | i <- mentioned_ids ]]) (
- any unfoldingUnfriendlyId mentioned_ids
+ = foldBag (||) unfoldingUnfriendlyId False mentioned_ids
|| mentions_litlit
- --)
-- ToDo: probably need to chk tycons/classes...
- mentions_no_other_ids = null mentioned_ids
+ mentions_no_other_ids = isEmptyBag mentioned_ids
explicit_INLINE_requested
-- did it come from a user {-# INLINE ... #-}?
= let
new_env = addOneToIdEnv inline_env binder (mkUnfolding guidance rhs)
- foldr_building = switch_is_on FoldrBuildOn
+ foldr_building = opt_FoldrBuildOn
in
if (not have_inlining_already) then
-- Not in env: we take it no matter what
projects / ghc-hetmet.git / blobdiff