-cpsTop :: CmmTopZ -> UniqSM (FuelMonad CmmTopZ)
-cpsTop p@(CmmData {}) = return (return p)
-cpsTop (CmmProc h l args g) =
- let procPoints = minimalProcPointSet (runTx cmmCfgOptsZ g)
- g' = addProcPointProtocols procPoints args g
- g'' = map_nodes id NotSpillOrReload id g'
- -- Change types of middle nodes to allow spill/reload
- in do { u1 <- getUs; u2 <- getUs; u3 <- getUs
- ; entry <- getUniqueUs >>= return . BlockId
- ; return $
- do { g <- return g''
- ; g <- dual_rewrite u1 dualLivenessWithInsertion g
- -- Insert spills at defns; reloads at return points
- ; g <- insertLateReloads' u2 (extend g)
- -- Duplicate reloads just before uses
- ; g <- dual_rewrite u3 removeDeadAssignmentsAndReloads (trim entry g)
- -- Remove redundant reloads (and any other redundant asst)
- ; return $ CmmProc h l args $ map_nodes id spillAndReloadComments id g
- }
- }
- where dual_rewrite u pass g = runDFM u dualLiveLattice $ b_rewrite pass g
- extend (LGraph eid blocks) = Graph (ZLast $ mkBranchNode eid) blocks
- trim _ (Graph (ZLast (LastOther (LastBranch id))) blocks) = LGraph id blocks
- trim e (Graph tail blocks) = LGraph e (insertBlock (Block e tail) blocks)
+cpsTop :: HscEnv -> CmmTopZ ->
+ IO ([(CLabel, CAFSet)],
+ [(CAFSet, CmmTopForInfoTables)])
+cpsTop _ p@(CmmData {}) = return ([], [(emptyFM, NoInfoTable p)])
+cpsTop hsc_env (CmmProc h l args (stackInfo@(entry_off, _), g)) =
+ do
+ dump Opt_D_dump_cmmz "Pre Proc Points Added" g
+ let callPPs = callProcPoints g
+ -- Why bother doing it this early?
+ -- g <- dual_rewrite Opt_D_dump_cmmz "spills and reloads"
+ -- (dualLivenessWithInsertion callPPs) g
+ -- g <- run $ insertLateReloads g -- Duplicate reloads just before uses
+ -- g <- dual_rewrite Opt_D_dump_cmmz "Dead Assignment Elimination"
+ -- (removeDeadAssignmentsAndReloads callPPs) g
+ dump Opt_D_dump_cmmz "Pre common block elimination" g
+ g <- return $ elimCommonBlocks g
+ dump Opt_D_dump_cmmz "Post common block elimination" g
+
+ ----------- Proc points -------------------
+ procPoints <- run $ minimalProcPointSet callPPs g
+ g <- run $ addProcPointProtocols callPPs procPoints g
+ dump Opt_D_dump_cmmz "Post Proc Points Added" g
+
+ ----------- Spills and reloads -------------------
+ g <-
+ -- pprTrace "pre Spills" (ppr g) $
+ dual_rewrite Opt_D_dump_cmmz "spills and reloads"
+ (dualLivenessWithInsertion procPoints) g
+ -- Insert spills at defns; reloads at return points
+ g <-
+ -- pprTrace "pre insertLateReloads" (ppr g) $
+ run $ insertLateReloads g -- Duplicate reloads just before uses
+ dump Opt_D_dump_cmmz "Post late reloads" g
+ g <-
+ -- pprTrace "post insertLateReloads" (ppr g) $
+ dual_rewrite Opt_D_dump_cmmz "Dead Assignment Elimination"
+ (removeDeadAssignmentsAndReloads procPoints) g
+ -- Remove redundant reloads (and any other redundant asst)
+
+ ----------- Debug only: add code to put zero in dead stack slots----
+ -- Debugging: stubbing slots on death can cause crashes early
+ g <-
+ -- trace "post dead-assign elim" $
+ if opt_StubDeadValues then run $ stubSlotsOnDeath g else return g
+
+
+ --------------- Stack layout ----------------
+ slotEnv <- run $ liveSlotAnal g
+ mbpprTrace "live slot analysis results: " (ppr slotEnv) $ return ()
+ -- cafEnv <- -- trace "post liveSlotAnal" $ run $ cafAnal g
+ -- (cafEnv, slotEnv) <-
+ -- -- trace "post print cafAnal" $
+ -- return $ extendEnvsForSafeForeignCalls cafEnv slotEnv g
+ slotEnv <- return $ extendEnvWithSafeForeignCalls liveSlotTransfers slotEnv g
+ mbpprTrace "slotEnv extended for safe foreign calls: " (ppr slotEnv) $ return ()
+ let areaMap = layout procPoints slotEnv entry_off g
+ mbpprTrace "areaMap" (ppr areaMap) $ return ()
+
+ ------------ Manifest the the stack pointer --------
+ g <- run $ manifestSP areaMap entry_off g
+ dump Opt_D_dump_cmmz "after manifestSP" g
+ -- UGH... manifestSP can require updates to the procPointMap.
+ -- We can probably do something quicker here for the update...
+
+ ------------- Split into separate procedures ------------
+ procPointMap <- run $ procPointAnalysis procPoints g
+ dump Opt_D_dump_cmmz "procpoint map" procPointMap
+ gs <- run $ splitAtProcPoints l callPPs procPoints procPointMap
+ (CmmProc h l args (stackInfo, g))
+ mapM_ (dump Opt_D_dump_cmmz "after splitting") gs
+
+ ------------- More CAFs and foreign calls ------------
+ cafEnv <- run $ cafAnal g
+ cafEnv <- return $ extendEnvWithSafeForeignCalls cafTransfers cafEnv g
+ let localCAFs = catMaybes $ map (localCAFInfo cafEnv) gs
+ mbpprTrace "localCAFs" (ppr localCAFs) $ return ()
+
+ gs <- liftM concat $ run $ foldM lowerSafeForeignCalls [] gs
+ mapM_ (dump Opt_D_dump_cmmz "after lowerSafeForeignCalls") gs
+
+ -- NO MORE GRAPH TRANSFORMATION AFTER HERE -- JUST MAKING INFOTABLES
+ let gs' = map (setInfoTableStackMap slotEnv areaMap) gs
+ mapM_ (dump Opt_D_dump_cmmz "after setInfoTableStackMap") gs'
+ let gs'' = map (bundleCAFs cafEnv) gs'
+ mapM_ (dump Opt_D_dump_cmmz "after bundleCAFs") gs''
+ return (localCAFs, gs'')
+ where dflags = hsc_dflags hsc_env
+ mbpprTrace x y z = if dopt Opt_D_dump_cmmz dflags then pprTrace x y z else z
+ dump f txt g = dumpIfSet_dyn dflags f txt (ppr g)
+ run = runFuelIO (hsc_OptFuel hsc_env)
+ dual_rewrite flag txt pass g =
+ do dump flag ("Pre " ++ txt) g
+ g <- run $ pass g
+ dump flag ("Post " ++ txt) $ g
+ return g
+
+-- This probably belongs in CmmBuildInfoTables?
+-- We're just finishing the job here: once we know what CAFs are defined
+-- in non-static closures, we can build the SRTs.
+toTops :: HscEnv -> FiniteMap CLabel CAFSet -> (TopSRT, [[CmmTopZ]])
+ -> [(CAFSet, CmmTopForInfoTables)] -> IO (TopSRT, [[CmmTopZ]])
+
+toTops hsc_env topCAFEnv (topSRT, tops) gs =
+ do let setSRT (topSRT, rst) g =
+ do (topSRT, gs) <- setInfoTableSRT topCAFEnv topSRT g
+ return (topSRT, gs : rst)
+ (topSRT, gs') <- runFuelIO (hsc_OptFuel hsc_env) $ foldM setSRT (topSRT, []) gs
+ gs' <- mapM finishInfoTables (concat gs')
+ return (topSRT, concat gs' : tops)