\section[SimplCore]{Driver for simplifying @Core@ programs}
\begin{code}
-module SimplCore ( core2core ) where
+module SimplCore ( core2core, simplifyExpr ) where
#include "HsVersions.h"
import CmdLineOpts ( CoreToDo(..), SimplifierSwitch(..),
SwitchResult(..), intSwitchSet,
- opt_UsageSPOn,
DynFlags, DynFlag(..), dopt, dopt_CoreToDo
)
import CoreLint ( showPass, endPass )
import CoreSyn
-import CoreFVs ( ruleSomeFreeVars )
-import HscTypes ( PackageRuleBase, HomeSymbolTable, ModDetails(..) )
+import CoreFVs ( ruleRhsFreeVars )
+import HscTypes ( PersistentCompilerState(..),
+ PackageRuleBase, HomeSymbolTable, IsExported, ModDetails(..)
+ )
import CSE ( cseProgram )
import Rules ( RuleBase, emptyRuleBase, ruleBaseFVs, ruleBaseIds,
extendRuleBaseList, addRuleBaseFVs )
import Module ( moduleEnvElts )
import CoreUnfold
-import PprCore ( pprCoreBindings, pprIdCoreRule )
+import PprCore ( pprCoreBindings, pprIdCoreRule, pprCoreExpr )
import OccurAnal ( occurAnalyseBinds )
import CoreUtils ( etaReduceExpr, coreBindsSize )
import Simplify ( simplTopBinds, simplExpr )
import ErrUtils ( dumpIfSet, dumpIfSet_dyn )
import FloatIn ( floatInwards )
import FloatOut ( floatOutwards )
-import Id ( Id, isDataConWrapId, setIdNoDiscard, isLocalId )
+import Id ( idName, isDataConWrapId, setIdNoDiscard, isLocalId )
import VarSet
import LiberateCase ( liberateCase )
import SAT ( doStaticArgs )
import IO ( hPutStr, stderr )
import Outputable
+import Maybes ( orElse )
import List ( partition )
\end{code}
\begin{code}
core2core :: DynFlags -- includes spec of what core-to-core passes to do
- -> PackageRuleBase -- Rule-base accumulated from imported packages
+ -> PersistentCompilerState
-> HomeSymbolTable
-> IsExported
-> [CoreBind] -- Binds in
-> [IdCoreRule] -- Rules in
-> IO ([CoreBind], [IdCoreRule]) -- binds, local orphan rules out
-core2core dflags pkg_rule_base hst is_exported binds rules
+core2core dflags pcs hst is_exported binds rules
= do
- let core_todos = dopt_CoreToDo dflags
+ let core_todos = dopt_CoreToDo dflags
+ let pkg_rule_base = pcs_rules pcs -- Rule-base accumulated from imported packages
+
us <- mkSplitUniqSupply 's'
let (cp_us, ru_us) = splitUniqSupply us
-- COMPUTE THE RULE BASE TO USE
(rule_base, local_rule_stuff, orphan_rules)
- <- prepareRules dflags pkg_rule_base hst ru_us rules
+ <- prepareRules dflags pkg_rule_base hst ru_us binds rules
-- PREPARE THE BINDINGS
let binds1 = updateBinders local_rule_stuff is_exported binds
return (processed_binds, orphan_rules)
+simplifyExpr :: DynFlags -- includes spec of what core-to-core passes to do
+ -> PersistentCompilerState
+ -> HomeSymbolTable
+ -> CoreExpr
+ -> IO CoreExpr
+simplifyExpr dflags pcs hst expr
+ = do {
+ ; us <- mkSplitUniqSupply 's'
+
+ ; let (expr', counts) = initSmpl dflags sw_chkr us emptyVarSet black_list_all
+ (simplExpr expr)
+
+ ; dumpIfSet_dyn dflags Opt_D_dump_simpl "Simplfied expression"
+ (pprCoreExpr expr')
+
+ ; return expr'
+ }
+ where
+ sw_chkr any = SwBool False -- A bit bogus
+ black_list_all v = True -- Black list everything
+
+
doCorePasses :: DynFlags
-> RuleBase -- the main rule base
-> SimplCount -- simplifier stats
\begin{code}
prepareRules :: DynFlags -> PackageRuleBase -> HomeSymbolTable
-> UniqSupply
+ -> [CoreBind]
-> [IdCoreRule] -- Local rules
- -> IO (RuleBase, -- Full rule base
- (IdSet,IdSet), -- Local rule Ids, and RHS fvs
- [IdCoreRule]) -- Orphan rules
+ -> IO (RuleBase, -- Full rule base
+ (IdSet,IdSet), -- Local rule Ids, and RHS fvs
+ [IdCoreRule]) -- Orphan rules
prepareRules dflags pkg_rule_base hst us binds rules
= do { let (better_rules,_) = initSmpl dflags sw_chkr us local_ids black_list_all
; dumpIfSet_dyn dflags Opt_D_dump_rules "Transformation rules"
(vcat (map pprIdCoreRule better_rules))
- ; let (local_id_rules, orphan_rules) = partition (isLocalId . fst) better_rules
- local_rule_rhs_fvs = unionVarSets (map ruleRhsFreeVars local_id_rules)
- local_rule_base = extendRuleBaseList emptyRuleBase local_id_rules
- local_rule_ids = ruleBaseIds local_rule_base -- Local Ids with rules attached
- imp_rule_base = foldl add_rules pkg_rule_base (moduleEnvElts hst)
- rule_base = extendRuleBaseList imp_rule_base orphan_rules
- final_rule_base = addRuleBaseFVs rule_base (ruleBaseFVs local_rule_base)
+ ; let (local_rules, orphan_rules) = partition (isLocalId . fst) better_rules
+ local_rule_rhs_fvs = unionVarSets (map (ruleRhsFreeVars . snd) local_rules)
+ local_rule_base = extendRuleBaseList emptyRuleBase local_rules
+ local_rule_ids = ruleBaseIds local_rule_base -- Local Ids with rules attached
+ imp_rule_base = foldl add_rules pkg_rule_base (moduleEnvElts hst)
+ rule_base = extendRuleBaseList imp_rule_base orphan_rules
+ final_rule_base = addRuleBaseFVs rule_base (ruleBaseFVs local_rule_base)
-- The last step black-lists the free vars of local rules too
; return (final_rule_base, (local_rule_ids, local_rule_rhs_fvs), orphan_rules)
local_ids = foldr (unionVarSet . mkVarSet . bindersOf) emptyVarSet binds
-updateBinders :: IdSet -- Locally defined ids with their Rules attached
- -> IdSet -- Ids free in the RHS of local rules
+updateBinders :: (IdSet, -- Locally defined ids with their Rules attached
+ IdSet) -- Ids free in the RHS of local rules
+ -> IsExported
-> [CoreBind] -> [CoreBind]
-- A horrible function
-- the rules (maybe we should?), so this substitution would make the rule
-- bogus.
-updateBinders rule_ids rule_rhs_fvs is_exported binds
+updateBinders (rule_ids, rule_rhs_fvs) is_exported binds
= map update_bndrs binds
where
update_bndrs (NonRec b r) = NonRec (update_bndr b) r
update_bndrs (Rec prs) = Rec [(update_bndr b, r) | (b,r) <- prs]
update_bndr bndr
- | is_exported (getName bndr)
+ | is_exported (idName bndr)
|| bndr `elemVarSet` rule_rhs_fvs = setIdNoDiscard bndr'
| otherwise = bndr'
where
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