FCode, -- type
initC, thenC, thenFC, listCs, listFCs, mapCs, mapFCs,
- returnFC, fixC, nopC, whenC,
+ returnFC, fixC, fixC_, nopC, whenC,
newUnique, newUniqSupply,
- emit, emitData, emitProc, emitSimpleProc,
+ emit, emitData, emitProc, emitProcWithConvention, emitSimpleProc,
getCmm, cgStmtsToBlocks,
getCodeR, getCode, getHeapUsage,
setSRTLabel, getSRTLabel,
setTickyCtrLabel, getTickyCtrLabel,
+ withUpdFrameOff, getUpdFrameOff, initUpdFrameOff,
+
HeapUsage(..), VirtualHpOffset, initHpUsage,
getHpUsage, setHpUsage, heapHWM,
setVirtHp, getVirtHp, setRealHp,
import StgCmmClosure
import DynFlags
-import MkZipCfgCmm
+import MkGraph
import BlockId
-import Cmm
+import CmmDecl
+import CmmExpr
+import CmmNode (UpdFrameOffset)
import CLabel
import TyCon ( PrimRep )
import SMRep
import VarEnv
import OrdList
import Unique
-import Util()
import UniqSupply
import FastString(sLit)
import Outputable
result
)
+fixC_ :: (a -> FCode a) -> FCode ()
+fixC_ fcode = fixC fcode >> return ()
--------------------------------------------------------
-- The code generator environment
data CgInfoDownwards -- information only passed *downwards* by the monad
= MkCgInfoDown {
- cgd_dflags :: DynFlags,
- cgd_mod :: Module, -- Module being compiled
- cgd_statics :: CgBindings, -- [Id -> info] : static environment
- cgd_srt_lbl :: CLabel, -- Label of the current top-level SRT
- cgd_ticky :: CLabel, -- Current destination for ticky counts
- cgd_sequel :: Sequel -- What to do at end of basic block
+ cgd_dflags :: DynFlags,
+ cgd_mod :: Module, -- Module being compiled
+ cgd_statics :: CgBindings, -- [Id -> info] : static environment
+ cgd_srt_lbl :: CLabel, -- Label of the current top-level SRT
+ cgd_updfr_off :: UpdFrameOffset, -- Size of current update frame
+ cgd_ticky :: CLabel, -- Current destination for ticky counts
+ cgd_sequel :: Sequel -- What to do at end of basic block
}
type CgBindings = IdEnv CgIdInfo
-- Can differ from the Id at occurrence sites by
-- virtue of being externalised, for splittable C
, cg_lf :: LambdaFormInfo
- , cg_loc :: CgLoc
+ , cg_loc :: CgLoc -- CmmExpr for the *tagged* value
, cg_rep :: PrimRep -- Cache for (idPrimRep id)
, cg_tag :: {-# UNPACK #-} !DynTag -- Cache for (lfDynTag cg_lf)
- }
+ }
data CgLoc
= CmmLoc CmmExpr -- A stable CmmExpr; that is, one not mentioning
| AssignTo
[LocalReg] -- Put result(s) in these regs and fall through
-- NB: no void arguments here
- C_SRT -- Here are the statics live in the continuation
-
-
+ Bool -- Should we adjust the heap pointer back to recover
+ -- space that's unused on this path?
+ -- We need to do this only if the expression may
+ -- allocate (e.g. it's a foreign call or allocating primOp)
+instance Show Sequel where
+ show (Return _) = "Sequel: Return"
+ show (AssignTo _ _) = "Sequel: Assign"
initCgInfoDown :: DynFlags -> Module -> CgInfoDownwards
initCgInfoDown dflags mod
- = MkCgInfoDown { cgd_dflags = dflags,
- cgd_mod = mod,
- cgd_statics = emptyVarEnv,
- cgd_srt_lbl = error "initC: srt_lbl",
- cgd_ticky = mkTopTickyCtrLabel,
- cgd_sequel = initSequel }
+ = MkCgInfoDown { cgd_dflags = dflags,
+ cgd_mod = mod,
+ cgd_statics = emptyVarEnv,
+ cgd_srt_lbl = error "initC: srt_lbl",
+ cgd_updfr_off = initUpdFrameOff,
+ cgd_ticky = mkTopTickyCtrLabel,
+ cgd_sequel = initSequel }
initSequel :: Sequel
initSequel = Return False
+initUpdFrameOff :: UpdFrameOffset
+initUpdFrameOff = widthInBytes wordWidth -- space for the RA
+
--------------------------------------------------------
-- The code generator state
= MkCgState {
cgs_stmts :: CmmAGraph, -- Current procedure
- cgs_tops :: OrdList CmmTopZ,
+ cgs_tops :: OrdList CmmTop,
-- Other procedures and data blocks in this compilation unit
-- Both are ordered only so that we can
-- reduce forward references, when it's easy to do so
-- the info-down part
cgs_hp_usg :: HeapUsage,
-
+
cgs_uniqs :: UniqSupply }
data HeapUsage =
HeapUsage {
virtHp :: VirtualHpOffset, -- Virtual offset of highest-allocated word
+ -- Incremented whenever we allocate
realHp :: VirtualHpOffset -- realHp: Virtual offset of real heap ptr
+ -- Used in instruction addressing modes
}
type VirtualHpOffset = WordOff
initCgState :: UniqSupply -> CgState
initCgState uniqs
- = MkCgState { cgs_stmts = mkNop, cgs_tops = nilOL,
- cgs_binds = emptyVarEnv,
- cgs_hp_usg = initHpUsage,
- cgs_uniqs = uniqs }
+ = MkCgState { cgs_stmts = mkNop, cgs_tops = nilOL,
+ cgs_binds = emptyVarEnv,
+ cgs_hp_usg = initHpUsage,
+ cgs_uniqs = uniqs }
stateIncUsage :: CgState -> CgState -> CgState
-- stateIncUsage@ e1 e2 incorporates in e1
withInfoDown code (info { cgd_srt_lbl = srt_lbl})
-- ----------------------------------------------------------------------------
+-- Get/set the size of the update frame
+
+-- We keep track of the size of the update frame so that we
+-- can set the stack pointer to the proper address on return
+-- (or tail call) from the closure.
+-- There should be at most one update frame for each closure.
+-- Note: I'm including the size of the original return address
+-- in the size of the update frame -- hence the default case on `get'.
+
+withUpdFrameOff :: UpdFrameOffset -> FCode () -> FCode ()
+withUpdFrameOff size code
+ = do { info <- getInfoDown
+ ; withInfoDown code (info {cgd_updfr_off = size }) }
+
+getUpdFrameOff :: FCode UpdFrameOffset
+getUpdFrameOff
+ = do { info <- getInfoDown
+ ; return $ cgd_updfr_off info }
+
+-- ----------------------------------------------------------------------------
-- Get/set the current ticky counter label
getTickyCtrLabel :: FCode CLabel
= do { info <- getInfoDown
; us <- newUniqSupply
; state <- getState
- ; let body_info_down = info { cgd_sequel = initSequel }
+ ; let body_info_down = info { cgd_sequel = initSequel
+ , cgd_updfr_off = initUpdFrameOff }
fork_state_in = (initCgState us) { cgs_binds = cgs_binds state }
((),fork_state_out)
= doFCode body_code body_info_down fork_state_in
= do { info <- getInfoDown
; us <- newUniqSupply
; state <- getState
- ; let rhs_info_down = info { cgd_statics = cgs_binds state,
- cgd_sequel = initSequel }
+ ; let rhs_info_down = info { cgd_statics = cgs_binds state
+ , cgd_sequel = initSequel
+ , cgd_updfr_off = initUpdFrameOff }
(result, fork_state_out) = doFCode body_code rhs_info_down
(initCgState us)
; setState (state `addCodeBlocksFrom` fork_state_out)
= do { info_down <- getInfoDown
; us <- newUniqSupply
; state <- getState
- ; let fork_state_in = (initCgState us)
- { cgs_binds = cgs_binds state }
- (result, fork_state_out) = doFCode body_code info_down fork_state_in
+ ; let info_down' = info_down -- { cgd_sequel = initSequel }
+ fork_state_in = (initCgState us) { cgs_binds = cgs_binds state }
+ (result, fork_state_out) = doFCode body_code info_down' fork_state_in
; setState $ state `addCodeBlocksFrom` fork_state_out
; return result }
-- that the virtual Hp is moved on to the worst virtual Hp for the branches
forkAlts branch_fcodes
- = do { info_down <- getInfoDown
- ; us <- newUniqSupply
- ; state <- getState
- ; let compile us branch
- = (us2, doFCode branch info_down branch_state)
- where
- (us1,us2) = splitUniqSupply us
- branch_state = (initCgState us1) {
- cgs_binds = cgs_binds state,
- cgs_hp_usg = cgs_hp_usg state }
-
- (_us, results) = mapAccumL compile us branch_fcodes
- (branch_results, branch_out_states) = unzip results
- ; setState $ foldl stateIncUsage state branch_out_states
- -- NB foldl. state is the *left* argument to stateIncUsage
- ; return branch_results }
+ = do { info_down <- getInfoDown
+ ; us <- newUniqSupply
+ ; state <- getState
+ ; let compile us branch
+ = (us2, doFCode branch info_down branch_state)
+ where
+ (us1,us2) = splitUniqSupply us
+ branch_state = (initCgState us1) {
+ cgs_binds = cgs_binds state,
+ cgs_hp_usg = cgs_hp_usg state }
+
+ (_us, results) = mapAccumL compile us branch_fcodes
+ (branch_results, branch_out_states) = unzip results
+ ; setState $ foldl stateIncUsage state branch_out_states
+ -- NB foldl. state is the *left* argument to stateIncUsage
+ ; return branch_results }
-- collect the code emitted by an FCode computation
getCodeR :: FCode a -> FCode (a, CmmAGraph)
where
data_block = CmmData sect lits
-emitProc :: CmmInfo -> CLabel -> CmmFormals -> CmmAGraph -> FCode ()
-emitProc info lbl args blocks
+emitProcWithConvention :: Convention -> CmmInfoTable -> CLabel -> CmmFormals ->
+ CmmAGraph -> FCode ()
+emitProcWithConvention conv info lbl args blocks
= do { us <- newUniqSupply
- ; let (offset, entry) = mkEntry (mkBlockId $ uniqFromSupply us) Native args
- blks = initUs_ us $ lgraphOfAGraph offset $ entry <*> blocks
- -- ; blks <- cgStmtsToBlocks blocks
- ; let proc_block = CmmProc info lbl args blks
+ ; let (offset, entry) = mkCallEntry conv args
+ blks = initUs_ us $ lgraphOfAGraph $ entry <*> blocks
+ ; let sinfo = StackInfo {arg_space = offset, updfr_space = Just initUpdFrameOff}
+ proc_block = CmmProc (TopInfo {info_tbl=info, stack_info=sinfo}) lbl blks
; state <- getState
; setState $ state { cgs_tops = cgs_tops state `snocOL` proc_block } }
+emitProc :: CmmInfoTable -> CLabel -> CmmFormals -> CmmAGraph -> FCode ()
+emitProc = emitProcWithConvention NativeNodeCall
+
emitSimpleProc :: CLabel -> CmmAGraph -> FCode ()
--- Emit a procedure whose body is the specified code; no info table
-emitSimpleProc lbl code
- = emitProc (CmmInfo Nothing Nothing CmmNonInfoTable) lbl [] code
+emitSimpleProc lbl code =
+ emitProc CmmNonInfoTable lbl [] code
-getCmm :: FCode () -> FCode CmmZ
+getCmm :: FCode () -> FCode Cmm
-- Get all the CmmTops (there should be no stmts)
-- Return a single Cmm which may be split from other Cmms by
-- object splitting (at a later stage)
cgStmtsToBlocks :: CmmAGraph -> FCode CmmGraph
cgStmtsToBlocks stmts
= do { us <- newUniqSupply
- ; return (initUs_ us (lgraphOfAGraph 0 stmts)) }
+ ; return (initUs_ us (lgraphOfAGraph stmts)) }
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