module Cmm (
GenCmm(..), Cmm, RawCmm,
GenCmmTop(..), CmmTop, RawCmmTop,
+ ListGraph(..),
CmmInfo(..), UpdateFrame(..),
CmmInfoTable(..), ClosureTypeInfo(..), ProfilingInfo(..), ClosureTypeTag,
GenBasicBlock(..), CmmBasicBlock, blockId, blockStmts, mapBlockStmts,
-- GenCmm is abstracted over
-- d, the type of static data elements in CmmData
-- h, the static info preceding the code of a CmmProc
--- i, the contents of a basic block within a CmmProc
+-- g, the control-flow graph of a CmmProc
--
-- We expect there to be two main instances of this type:
-- (a) C--, i.e. populated with various C-- constructs
-- (Cmm and RawCmm below)
-- (b) Native code, populated with data/instructions
--
-newtype GenCmm d h i = Cmm [GenCmmTop d h i]
+newtype GenCmm d h g = Cmm [GenCmmTop d h g]
-- | A top-level chunk, abstracted over the type of the contents of
-- the basic blocks (Cmm or instructions are the likely instantiations).
-data GenCmmTop d h i
+data GenCmmTop d h g
= CmmProc -- A procedure
h -- Extra header such as the info table
CLabel -- Used to generate both info & entry labels
CmmFormals -- Argument locals live on entry (C-- procedure params)
- [GenBasicBlock i] -- Code, may be empty. The first block is
- -- the entry point, and should be labelled by the code gen
- -- with the CLabel. The order is otherwise initially
- -- unimportant, but at some point the code gen will
- -- fix the order.
-
- -- The BlockId of the first block does not give rise
- -- to a label. To jump to the first block in a Proc,
- -- use the appropriate CLabel.
-
- -- BlockIds are only unique within a procedure
+ g -- Control-flow graph for the procedure's code
| CmmData -- Static data
Section
[d]
+-- | A control-flow graph represented as a list of extended basic blocks.
+newtype ListGraph i = ListGraph [GenBasicBlock i]
+ -- ^ Code, may be empty. The first block is the entry point. The
+ -- order is otherwise initially unimportant, but at some point the
+ -- code gen will fix the order.
+
+ -- BlockIds must be unique across an entire compilation unit, since
+ -- they are translated to assembly-language labels, which scope
+ -- across a whole compilation unit.
+
-- | Cmm with the info table as a data type
-type Cmm = GenCmm CmmStatic CmmInfo CmmStmt
-type CmmTop = GenCmmTop CmmStatic CmmInfo CmmStmt
+type Cmm = GenCmm CmmStatic CmmInfo (ListGraph CmmStmt)
+type CmmTop = GenCmmTop CmmStatic CmmInfo (ListGraph CmmStmt)
-- | Cmm with the info tables converted to a list of 'CmmStatic'
-type RawCmm = GenCmm CmmStatic [CmmStatic] CmmStmt
-type RawCmmTop = GenCmmTop CmmStatic [CmmStatic] CmmStmt
+type RawCmm = GenCmm CmmStatic [CmmStatic] (ListGraph CmmStmt)
+type RawCmmTop = GenCmmTop CmmStatic [CmmStatic] (ListGraph CmmStmt)
-- A basic block containing a single label, at the beginning.
-- Empty functions just don't work with the CPS algorithm, but
-- they don't need the transformation anyway so just output them directly
-cpsProc uniqSupply proc@(CmmProc _ _ _ [])
+cpsProc uniqSupply proc@(CmmProc _ _ _ (ListGraph []))
= pprTrace "cpsProc: unexpected empty proc" (ppr proc) [proc]
-- CPS transform for those procs that actually need it
-- * Now break each block into a bunch of blocks (at call sites);
-- all but the first will be ContinuationEntry
--
-cpsProc uniqSupply (CmmProc info ident params blocks) = cps_procs
+cpsProc uniqSupply (CmmProc info ident params (ListGraph blocks)) = cps_procs
where
-- We need to be generating uniques for several things.
-- We could make this function monadic to handle that
-> CmmTop
continuationToProc (max_stack, update_frame_size, formats) stack_use uniques
(Continuation info label formals _ blocks) =
- CmmProc info label formals (concat $ zipWith3 continuationToProc' uniques blocks (True : repeat False))
+ CmmProc info label formals (ListGraph blocks')
where
+ blocks' = concat $ zipWith3 continuationToProc' uniques blocks
+ (True : repeat False)
curr_format = maybe unknown_block id $ lookup label formats
unknown_block = panic "unknown BlockId in continuationToProc"
curr_stack = continuation_frame_size curr_format
mkInfoTable :: Unique -> CmmTop -> [RawCmmTop]
mkInfoTable uniq (CmmData sec dat) = [CmmData sec dat]
-mkInfoTable uniq (CmmProc (CmmInfo _ _ info) entry_label arguments blocks) =
+mkInfoTable uniq (CmmProc (CmmInfo _ _ info) entry_label arguments (ListGraph blocks)) =
case info of
-- | Code without an info table. Easy.
- CmmNonInfoTable -> [CmmProc [] entry_label arguments blocks]
+ CmmNonInfoTable -> [CmmProc [] entry_label arguments (ListGraph blocks)]
CmmInfoTable (ProfilingInfo ty_prof cl_prof) type_tag type_info ->
let info_label = entryLblToInfoLbl entry_label
mkInfoTableAndCode info_lbl std_info extra_bits entry_lbl args blocks
| tablesNextToCode -- Reverse the extra_bits; and emit the top-level proc
= [CmmProc (map CmmStaticLit (reverse extra_bits ++ std_info))
- entry_lbl args blocks]
+ entry_lbl args (ListGraph blocks)]
| null blocks -- No actual code; only the info table is significant
= -- Use a zero place-holder in place of the
| otherwise -- Separately emit info table (with the function entry
= -- point as first entry) and the entry code
- [CmmProc [] entry_lbl args blocks,
+ [CmmProc [] entry_lbl args (ListGraph blocks),
mkDataLits info_lbl (CmmLabel entry_lbl : std_info ++ extra_bits)]
mkSRTLit :: CLabel
-- -----------------------------------------------------------------------------
-- Exported entry points:
-cmmLint :: GenCmm d h CmmStmt -> Maybe SDoc
+cmmLint :: GenCmm d h (ListGraph CmmStmt) -> Maybe SDoc
cmmLint (Cmm tops) = runCmmLint $ mapM_ lintCmmTop tops
-cmmLintTop :: GenCmmTop d h CmmStmt -> Maybe SDoc
+cmmLintTop :: GenCmmTop d h (ListGraph CmmStmt) -> Maybe SDoc
cmmLintTop top = runCmmLint $ lintCmmTop top
runCmmLint :: CmmLint a -> Maybe SDoc
Left err -> Just (ptext SLIT("Cmm lint error:") $$ nest 2 err)
Right _ -> Nothing
-lintCmmTop (CmmProc _ lbl _ blocks)
+lintCmmTop (CmmProc _ lbl _ (ListGraph blocks))
= addLintInfo (text "in proc " <> pprCLabel lbl) $
mapM_ lintCmmBlock blocks
lintCmmTop _other
-}
cmmLoopifyForC :: RawCmmTop -> RawCmmTop
-cmmLoopifyForC p@(CmmProc info entry_lbl [] blocks@(BasicBlock top_id _ : _))
+cmmLoopifyForC p@(CmmProc info entry_lbl [] (ListGraph blocks@(BasicBlock top_id _ : _)))
| null info = p -- only if there's an info table, ignore case alts
| otherwise =
-- pprTrace "jump_lbl" (ppr jump_lbl <+> ppr entry_lbl) $
- CmmProc info entry_lbl [] blocks'
+ CmmProc info entry_lbl [] (ListGraph blocks')
where blocks' = [ BasicBlock id (map do_stmt stmts)
| BasicBlock id stmts <- blocks ]
-- top level procs
--
pprTop :: RawCmmTop -> SDoc
-pprTop (CmmProc info clbl _params blocks) =
+pprTop (CmmProc info clbl _params (ListGraph blocks)) =
(if not (null info)
then pprDataExterns info $$
pprWordArray (entryLblToInfoLbl clbl) info
import System.IO
import Data.Maybe
-pprCmms :: (Outputable info) => [GenCmm CmmStatic info CmmStmt] -> SDoc
+pprCmms :: (Outputable info) => [GenCmm CmmStatic info (ListGraph CmmStmt)] -> SDoc
pprCmms cmms = pprCode CStyle (vcat (intersperse separator $ map ppr cmms))
where
separator = space $$ ptext SLIT("-------------------") $$ space
-----------------------------------------------------------------------------
-instance (Outputable info) => Outputable (GenCmm CmmStatic info CmmStmt) where
+instance (Outputable info) => Outputable (GenCmm CmmStatic info (ListGraph CmmStmt)) where
ppr c = pprCmm c
instance (Outputable d, Outputable info, Outputable i)
=> Outputable (GenCmmTop d info i) where
ppr t = pprTop t
+instance Outputable i => Outputable (ListGraph i) where
+ ppr (ListGraph blocks) = vcat (map ppr blocks)
+
instance (Outputable instr) => Outputable (GenBasicBlock instr) where
ppr b = pprBBlock b
-----------------------------------------------------------------------------
-pprCmm :: (Outputable info) => GenCmm CmmStatic info CmmStmt -> SDoc
+pprCmm :: (Outputable info) => GenCmm CmmStatic info (ListGraph CmmStmt) -> SDoc
pprCmm (Cmm tops) = vcat $ intersperse (text "") $ map pprTop tops
-- --------------------------------------------------------------------------
-- Top level `procedure' blocks.
--
-pprTop :: (Outputable d, Outputable info, Outputable i)
- => GenCmmTop d info i -> SDoc
+pprTop :: (Outputable d, Outputable info, Outputable g)
+ => GenCmmTop d info g -> SDoc
-pprTop (CmmProc info lbl params blocks )
+pprTop (CmmProc info lbl params graph)
= vcat [ pprCLabel lbl <> parens (commafy $ map ppr params) <+> lbrace
, nest 8 $ lbrace <+> ppr info $$ rbrace
- , nest 4 $ vcat (map ppr blocks)
+ , nest 4 $ ppr graph
, rbrace ]
-- --------------------------------------------------------------------------
emitProc :: CmmInfo -> CLabel -> CmmFormals -> [CmmBasicBlock] -> Code
emitProc info lbl args blocks
- = do { let proc_block = CmmProc info lbl args blocks
+ = do { let proc_block = CmmProc info lbl args (ListGraph blocks)
; state <- getState
; setState $ state { cgs_tops = cgs_tops state `snocOL` proc_block } }
emitDataLits lbl lits
= emitData Data (CmmDataLabel lbl : map CmmStaticLit lits)
-mkDataLits :: CLabel -> [CmmLit] -> GenCmmTop CmmStatic info stmt
+mkDataLits :: CLabel -> [CmmLit] -> GenCmmTop CmmStatic info graph
-- Emit a data-segment data block
mkDataLits lbl lits
= CmmData Data (CmmDataLabel lbl : map CmmStaticLit lits)
needsRelocation (CmmLabelOff _ _) = True
needsRelocation _ = False
-mkRODataLits :: CLabel -> [CmmLit] -> GenCmmTop CmmStatic info stmt
+mkRODataLits :: CLabel -> [CmmLit] -> GenCmmTop CmmStatic info graph
mkRODataLits lbl lits
= CmmData section (CmmDataLabel lbl : map CmmStaticLit lits)
where section | any needsRelocation lits = RelocatableReadOnlyData
partial_mg
| LoadDependenciesOf _mod <- how_much
= ASSERT( case last partial_mg0 of
- AcyclicSCC ms -> ms_mod_name ms == mod; _ -> False )
+ AcyclicSCC ms -> ms_mod_name ms == _mod; _ -> False )
List.init partial_mg0
| otherwise
= partial_mg0
| dopt Opt_SplitObjs dflags = split_marker : tops
| otherwise = tops
- split_marker = CmmProc [] mkSplitMarkerLabel [] []
+ split_marker = CmmProc [] mkSplitMarkerLabel [] (ListGraph [])
-- | Do native code generation on all these cmms.
#if i386_TARGET_ARCH
x86fp_kludge :: NatCmmTop -> NatCmmTop
x86fp_kludge top@(CmmData _ _) = top
-x86fp_kludge top@(CmmProc info lbl params code) =
- CmmProc info lbl params (map bb_i386_insert_ffrees code)
+x86fp_kludge top@(CmmProc info lbl params (ListGraph code)) =
+ CmmProc info lbl params (ListGraph $ map bb_i386_insert_ffrees code)
where
bb_i386_insert_ffrees (BasicBlock id instrs) =
BasicBlock id (i386_insert_ffrees instrs)
sequenceTop :: NatCmmTop -> NatCmmTop
sequenceTop top@(CmmData _ _) = top
-sequenceTop (CmmProc info lbl params blocks) =
- CmmProc info lbl params (makeFarBranches $ sequenceBlocks blocks)
+sequenceTop (CmmProc info lbl params (ListGraph blocks)) =
+ CmmProc info lbl params (ListGraph $ makeFarBranches $ sequenceBlocks blocks)
-- The algorithm is very simple (and stupid): we make a graph out of
-- the blocks where there is an edge from one block to another iff the
mapping = foldr plusUFM emptyUFM mappings
build_mapping top@(CmmData _ _) = (top, emptyUFM)
-build_mapping (CmmProc info lbl params [])
- = (CmmProc info lbl params [], emptyUFM)
-build_mapping (CmmProc info lbl params (head:blocks))
- = (CmmProc info lbl params (head:others), mapping)
+build_mapping (CmmProc info lbl params (ListGraph []))
+ = (CmmProc info lbl params (ListGraph []), emptyUFM)
+build_mapping (CmmProc info lbl params (ListGraph (head:blocks)))
+ = (CmmProc info lbl params (ListGraph (head:others)), mapping)
-- drop the shorted blocks, but don't ever drop the first one,
-- because it is pointed to by a global label.
where
= CmmData sec (map (shortcutStatic (lookupUFM ufm)) statics)
-- we need to get the jump tables, so apply the mapping to the entries
-- of a CmmData too.
-apply_mapping ufm (CmmProc info lbl params blocks)
- = CmmProc info lbl params (map short_bb blocks)
+apply_mapping ufm (CmmProc info lbl params (ListGraph blocks))
+ = CmmProc info lbl params (ListGraph $ map short_bb blocks)
where
short_bb (BasicBlock id insns) = BasicBlock id $! map short_insn insns
short_insn i = shortcutJump (lookupUFM ufm) i
fixAssignsTop :: RawCmmTop -> UniqSM RawCmmTop
fixAssignsTop top@(CmmData _ _) = returnUs top
-fixAssignsTop (CmmProc info lbl params blocks) =
+fixAssignsTop (CmmProc info lbl params (ListGraph blocks)) =
mapUs fixAssignsBlock blocks `thenUs` \ blocks' ->
- returnUs (CmmProc info lbl params blocks')
+ returnUs (CmmProc info lbl params (ListGraph blocks'))
fixAssignsBlock :: CmmBasicBlock -> UniqSM CmmBasicBlock
fixAssignsBlock (BasicBlock id stmts) =
cmmToCmm :: DynFlags -> RawCmmTop -> (RawCmmTop, [CLabel])
cmmToCmm _ top@(CmmData _ _) = (top, [])
-cmmToCmm dflags (CmmProc info lbl params blocks) = runCmmOpt dflags $ do
+cmmToCmm dflags (CmmProc info lbl params (ListGraph blocks)) = runCmmOpt dflags $ do
blocks' <- mapM cmmBlockConFold (cmmMiniInline blocks)
- return $ CmmProc info lbl params blocks'
+ return $ CmmProc info lbl params (ListGraph blocks')
newtype CmmOptM a = CmmOptM (([CLabel], DynFlags) -> (# a, [CLabel] #))
type InstrBlock = OrdList Instr
cmmTopCodeGen :: RawCmmTop -> NatM [NatCmmTop]
-cmmTopCodeGen (CmmProc info lab params blocks) = do
+cmmTopCodeGen (CmmProc info lab params (ListGraph blocks)) = do
(nat_blocks,statics) <- mapAndUnzipM basicBlockCodeGen blocks
picBaseMb <- getPicBaseMaybeNat
- let proc = CmmProc info lab params (concat nat_blocks)
+ let proc = CmmProc info lab params (ListGraph $ concat nat_blocks)
tops = proc : concat statics
case picBaseMb of
Just picBase -> initializePicBase picBase tops
-- Our flavours of the Cmm types
-- Type synonyms for Cmm populated with native code
-type NatCmm = GenCmm CmmStatic [CmmStatic] Instr
-type NatCmmTop = GenCmmTop CmmStatic [CmmStatic] Instr
+type NatCmm = GenCmm CmmStatic [CmmStatic] (ListGraph Instr)
+type NatCmmTop = GenCmmTop CmmStatic [CmmStatic] (ListGraph Instr)
type NatBasicBlock = GenBasicBlock Instr
-- -----------------------------------------------------------------------------
-- call 1f
-- 1: popl %picReg
-initializePicBase picReg (CmmProc info lab params blocks : statics)
- = return (CmmProc info lab params (b':tail blocks) : statics)
+initializePicBase picReg (CmmProc info lab params (ListGraph blocks) : statics)
+ = return (CmmProc info lab params (ListGraph (b':tail blocks)) : statics)
where BasicBlock bID insns = head blocks
b' = BasicBlock bID (FETCHPC picReg : insns)
-- the (32-bit) offset from our local label to our global offset table
-- (.LCTOC1 aka gotOffLabel).
initializePicBase picReg
- (CmmProc info lab params blocks : statics)
+ (CmmProc info lab params (ListGraph blocks) : statics)
= do
gotOffLabel <- getNewLabelNat
tmp <- getNewRegNat wordRep
(AddrRegImm picReg offsetToOffset)
: ADD picReg picReg (RIReg tmp)
: insns)
- return (CmmProc info lab params (b' : tail blocks) : gotOffset : statics)
+ return (CmmProc info lab params (ListGraph (b' : tail blocks)) : gotOffset : statics)
#elif i386_TARGET_ARCH && linux_TARGET_OS
-- We cheat a bit here by defining a pseudo-instruction named FETCHGOT
-- addl __GLOBAL_OFFSET_TABLE__+.-1b, %picReg
-- (See PprMach.lhs)
-initializePicBase picReg (CmmProc info lab params blocks : statics)
- = return (CmmProc info lab params (b':tail blocks) : statics)
+initializePicBase picReg (CmmProc info lab params (ListGraph blocks) : statics)
+ = return (CmmProc info lab params (ListGraph (b':tail blocks)) : statics)
where BasicBlock bID insns = head blocks
b' = BasicBlock bID (FETCHGOT picReg : insns)
pprSectionHeader section $$ vcat (map pprData dats)
-- special case for split markers:
-pprNatCmmTop (CmmProc [] lbl _ []) = pprLabel lbl
+pprNatCmmTop (CmmProc [] lbl _ (ListGraph [])) = pprLabel lbl
-pprNatCmmTop (CmmProc info lbl params blocks) =
+pprNatCmmTop (CmmProc info lbl params (ListGraph blocks)) =
pprSectionHeader Text $$
(if not (null info)
then
( CmmData sec d
, Nothing )
-regAlloc (CmmProc (LiveInfo info _ _) lbl params [])
+regAlloc (CmmProc (LiveInfo info _ _) lbl params (ListGraph []))
= return
- ( CmmProc info lbl params []
+ ( CmmProc info lbl params (ListGraph [])
, Nothing )
-regAlloc (CmmProc static lbl params comps)
+regAlloc (CmmProc static lbl params (ListGraph comps))
| LiveInfo info (Just first_id) block_live <- static
= do
-- do register allocation on each component.
let ((first':_), rest')
= partition ((== first_id) . blockId) final_blocks
- return ( CmmProc info lbl params (first' : rest')
+ return ( CmmProc info lbl params (ListGraph (first' : rest'))
, Just stats)
-- bogus. to make non-exhaustive match warning go away.
slurpJoinMovs live
= slurpCmm emptyBag live
where
- slurpCmm rs CmmData{} = rs
- slurpCmm rs (CmmProc _ _ _ blocks) = foldl' slurpComp rs blocks
- slurpComp rs (BasicBlock _ blocks) = foldl' slurpBlock rs blocks
- slurpBlock rs (BasicBlock _ instrs) = foldl' slurpLI rs instrs
-
- slurpLI rs (Instr _ Nothing) = rs
+ slurpCmm rs CmmData{} = rs
+ slurpCmm rs (CmmProc _ _ _ (ListGraph blocks)) = foldl' slurpComp rs blocks
+ slurpComp rs (BasicBlock _ blocks) = foldl' slurpBlock rs blocks
+ slurpBlock rs (BasicBlock _ instrs) = foldl' slurpLI rs instrs
+
+ slurpLI rs (Instr _ Nothing) = rs
slurpLI rs (Instr instr (Just live))
| Just (r1, r2) <- isRegRegMove instr
, elementOfUniqSet r1 $ liveDieRead live
= GenCmmTop
CmmStatic
LiveInfo
- (GenBasicBlock LiveInstr)
+ (ListGraph (GenBasicBlock LiveInstr))
-- the "instructions" here are actually more blocks,
-- single blocks are acyclic
-- multiple blocks are taken to be cyclic.
mapBlockTopM _ cmm@(CmmData{})
= return cmm
-mapBlockTopM f (CmmProc header label params comps)
+mapBlockTopM f (CmmProc header label params (ListGraph comps))
= do comps' <- mapM (mapBlockCompM f) comps
- return $ CmmProc header label params comps'
+ return $ CmmProc header label params (ListGraph comps')
mapBlockCompM f (BasicBlock i blocks)
= do blocks' <- mapM f blocks
-- map a function across all the basic blocks in this code
mapGenBlockTop
- :: (GenBasicBlock i -> GenBasicBlock i)
- -> (GenCmmTop d h i -> GenCmmTop d h i)
+ :: (GenBasicBlock i -> GenBasicBlock i)
+ -> (GenCmmTop d h (ListGraph i) -> GenCmmTop d h (ListGraph i))
mapGenBlockTop f cmm
= evalState (mapGenBlockTopM (\x -> return $ f x) cmm) ()
-- | map a function across all the basic blocks in this code (monadic version)
mapGenBlockTopM
:: Monad m
- => (GenBasicBlock i -> m (GenBasicBlock i))
- -> (GenCmmTop d h i -> m (GenCmmTop d h i))
+ => (GenBasicBlock i -> m (GenBasicBlock i))
+ -> (GenCmmTop d h (ListGraph i) -> m (GenCmmTop d h (ListGraph i)))
mapGenBlockTopM _ cmm@(CmmData{})
= return cmm
-mapGenBlockTopM f (CmmProc header label params blocks)
+mapGenBlockTopM f (CmmProc header label params (ListGraph blocks))
= do blocks' <- mapM f blocks
- return $ CmmProc header label params blocks'
+ return $ CmmProc header label params (ListGraph blocks')
-- | Slurp out the list of register conflicts and reg-reg moves from this top level thing.
= slurpCmm (emptyBag, emptyBag) live
where slurpCmm rs CmmData{} = rs
- slurpCmm rs (CmmProc info _ _ blocks)
+ slurpCmm rs (CmmProc info _ _ (ListGraph blocks))
= foldl' (slurpComp info) rs blocks
slurpComp info rs (BasicBlock _ blocks)
= stripCmm live
where stripCmm (CmmData sec ds) = CmmData sec ds
- stripCmm (CmmProc (LiveInfo info _ _) label params comps)
- = CmmProc info label params (concatMap stripComp comps)
+ stripCmm (CmmProc (LiveInfo info _ _) label params (ListGraph comps))
+ = CmmProc info label params (ListGraph $ concatMap stripComp comps)
stripComp (BasicBlock _ blocks) = map stripBlock blocks
stripBlock (BasicBlock i instrs) = BasicBlock i (map stripLI instrs)
= countCmm emptyUFM cmm
where
countCmm fm CmmData{} = fm
- countCmm fm (CmmProc info _ _ blocks)
+ countCmm fm (CmmProc info _ _ (ListGraph blocks))
= foldl' (countComp info) fm blocks
countComp info fm (BasicBlock _ blocks)
where
patchCmm cmm@CmmData{} = cmm
- patchCmm (CmmProc info label params comps)
+ patchCmm (CmmProc info label params (ListGraph comps))
| LiveInfo static id blockMap <- info
= let patchRegSet set = mkUniqSet $ map patchF $ uniqSetToList set
blockMap' = mapUFM patchRegSet blockMap
info' = LiveInfo static id blockMap'
- in CmmProc info' label params $ map patchComp comps
+ in CmmProc info' label params $ ListGraph $ map patchComp comps
patchComp (BasicBlock id blocks)
= BasicBlock id $ map patchBlock blocks
regLiveness (CmmData i d)
= returnUs $ CmmData i d
-regLiveness (CmmProc info lbl params [])
+regLiveness (CmmProc info lbl params (ListGraph []))
= returnUs $ CmmProc
(LiveInfo info Nothing emptyUFM)
- lbl params []
+ lbl params (ListGraph [])
-regLiveness (CmmProc info lbl params blocks@(first : _))
+regLiveness (CmmProc info lbl params (ListGraph blocks@(first : _)))
= let first_id = blockId first
sccs = sccBlocks blocks
(ann_sccs, block_live) = computeLiveness sccs
in returnUs $ CmmProc
(LiveInfo info (Just first_id) block_live)
- lbl params liveBlocks
+ lbl params (ListGraph liveBlocks)
sccBlocks :: [NatBasicBlock] -> [SCC NatBasicBlock]