--
-- Colors in graphviz graphs could be nicer.
--
+{-# OPTIONS -fno-warn-missing-signatures #-}
module RegAllocColor (
regAlloc,
import qualified GraphColor as Color
import RegLiveness
import RegSpill
+import RegSpillClean
import RegAllocStats
import MachRegs
import MachInstrs
-import RegCoalesce
import PprMach
import UniqSupply
import UniqFM
import Bag
import Outputable
+import Util
import Data.List
import Data.Maybe
regAlloc dump regsFree slotsFree code
= do
- (code_final, debug_codeGraphs, graph_final)
+ (code_final, debug_codeGraphs, _)
<- regAlloc_spin dump 0 trivColorable regsFree slotsFree [] code
return ( code_final
$$ text "slotsFree = " <> ppr (sizeUniqSet slotsFree))
-- build a conflict graph from the code.
- graph <- buildGraph code
+ graph <- {-# SCC "BuildGraph" #-} buildGraph code
-- build a map of how many instructions each reg lives for.
-- this is lazy, it won't be computed unless we need to spill
- let fmLife = plusUFMs_C (\(r1, l1) (r2, l2) -> (r1, l1 + l2))
+
+ let fmLife = {-# SCC "LifetimeCount" #-} plusUFMs_C (\(r1, l1) (_, l2) -> (r1, l1 + l2))
$ map lifetimeCount code
-- record startup state
let spill = chooseSpill_maxLife fmLife
-- try and color the graph
- let (graph_colored, rsSpill)
- = Color.colorGraph regsFree triv spill graph
+ let (graph_colored, rsSpill, rmCoalesce)
+ = {-# SCC "ColorGraph" #-} Color.colorGraph regsFree triv spill graph
+
+ -- rewrite regs in the code that have been coalesced
+ let patchF reg = case lookupUFM rmCoalesce reg of
+ Just reg' -> reg'
+ Nothing -> reg
+ let code_coalesced
+ = map (patchEraseLive patchF) code
+
-- see if we've found a coloring
if isEmptyUniqSet rsSpill
then do
-- patch the registers using the info in the graph
- let code_patched = map (patchRegsFromGraph graph_colored) code
+ let code_patched = map (patchRegsFromGraph graph_colored) code_coalesced
+
+ -- clean out unneeded SPILL/RELOADs
+ let code_spillclean = map cleanSpills code_patched
-- strip off liveness information
let code_nat = map stripLive code_patched
- -- rewrite SPILL/REALOAD pseudos into real instructions
+ -- rewrite SPILL/RELOAD pseudos into real instructions
let spillNatTop = mapGenBlockTop spillNatBlock
let code_final = map spillNatTop code_nat
let stat =
RegAllocStatsColored
{ raGraph = graph_colored
- , raPatchedCmm = code_patched
- , raFinalCmm = code_final }
+ , raCoalesced = rmCoalesce
+ , raPatched = code_patched
+ , raSpillClean = code_spillclean
+ , raFinal = code_final
+ , raSRMs = foldl addSRM (0, 0, 0) $ map countSRMs code_spillclean }
- return ( code_nat
- , if dump
- then [stat] ++ maybeToList stat1 ++ debug_codeGraphs
+
+ let statList =
+ if dump then [stat] ++ maybeToList stat1 ++ debug_codeGraphs
else []
+
+ -- space leak avoidance
+ seqList statList $! return ()
+
+ return ( code_final
+ , statList
, graph_colored)
else do
-- spill the uncolored regs
(code_spilled, slotsFree', spillStats)
- <- regSpill code slotsFree rsSpill
-
+ <- regSpill code_coalesced slotsFree rsSpill
+
-- recalculate liveness
let code_nat = map stripLive code_spilled
code_relive <- mapM regLiveness code_nat
let stat =
RegAllocStatsSpill
{ raGraph = graph_colored
+ , raCoalesced = rmCoalesce
, raSpillStats = spillStats
, raLifetimes = fmLife
, raSpilled = code_spilled }
- -- try again
- regAlloc_spin dump (spinCount + 1) triv regsFree slotsFree'
- (if dump
+ let statList =
+ if dump
then [stat] ++ maybeToList stat1 ++ debug_codeGraphs
- else [])
+ else []
+
+ -- space leak avoidance
+ seqList statList $! return ()
+
+ regAlloc_spin dump (spinCount + 1) triv regsFree slotsFree'
+ statList
code_relive
buildGraph code
= do
- -- Add the reg-reg conflicts to the graph
- let conflictSets = unionManyBags (map slurpConflicts code)
- let graph_conflict = foldrBag graphAddConflictSet Color.initGraph conflictSets
+ -- Slurp out the conflicts and reg->reg moves from this code
+ let (conflictList, moveList) =
+ unzip $ map slurpConflicts code
+
+ let conflictBag = unionManyBags conflictList
+ let moveBag = unionManyBags moveList
+ -- Add the reg-reg conflicts to the graph
+ let graph_conflict = foldrBag graphAddConflictSet Color.initGraph conflictBag
-- Add the coalescences edges to the graph.
- let coalesce = unionManyBags (map slurpJoinMovs code)
- let graph_coalesce = foldrBag graphAddCoalesce graph_conflict coalesce
+ let graph_coalesce = foldrBag graphAddCoalesce graph_conflict moveBag
- return $ graph_coalesce
+ return graph_coalesce
-- | Add some conflict edges to the graph.
-> Color.Graph Reg RegClass Reg
graphAddCoalesce (r1, r2) graph
- | RealReg regno <- r1
+ | RealReg _ <- r1
= Color.addPreference (regWithClass r2) r1 graph
- | RealReg regno <- r2
+ | RealReg _ <- r2
= Color.addPreference (regWithClass r1) r2 graph
| otherwise
= pprPanic "patchRegsFromGraph: register mapping failed."
( text "There is no node in the graph for register " <> ppr reg
$$ ppr code
- $$ Color.dotGraph (\x -> text "white") trivColorable graph)
+ $$ Color.dotGraph (\_ -> text "white") trivColorable graph)
in patchEraseLive patchF code
plusUFMs_C f maps
= foldl (plusUFM_C f) emptyUFM maps
+
projects / ghc-hetmet.git / blobdiff