{-# LANGUAGE PatternGuards #-}
-{-# OPTIONS -Wall -fno-warn-name-shadowing #-}
module CmmCvt
( cmmToZgraph, cmmOfZgraph )
where
+import BlockId
import Cmm
-import CmmExpr
import MkZipCfgCmm hiding (CmmGraph)
import ZipCfgCmmRep -- imported for reverse conversion
import CmmZipUtil
import PprCmm()
-import PprCmmZ()
import qualified ZipCfg as G
import FastString
+import Control.Monad
import Outputable
-import Panic
-import UniqSet
import UniqSupply
-import Maybe
+cmmToZgraph :: GenCmm d h (ListGraph CmmStmt) -> UniqSM (GenCmm d h (CmmStackInfo, CmmGraph))
+cmmOfZgraph :: GenCmm d h (CmmStackInfo, CmmGraph) -> GenCmm d h (ListGraph CmmStmt)
-cmmToZgraph :: GenCmm d h (ListGraph CmmStmt) -> UniqSM (GenCmm d h CmmGraph)
-cmmOfZgraph :: GenCmm d h (CmmGraph) -> GenCmm d h (ListGraph CmmStmt)
+cmmToZgraph (Cmm tops) = liftM Cmm $ mapM mapTop tops
+ where mapTop (CmmProc h l args g) =
+ toZgraph (showSDoc $ ppr l) args g >>= return . CmmProc h l args
+ mapTop (CmmData s ds) = return $ CmmData s ds
+cmmOfZgraph = cmmMapGraph (ofZgraph . snd)
-cmmToZgraph = cmmMapGraphM toZgraph
-cmmOfZgraph = cmmMapGraph ofZgraph
-
-
-toZgraph :: String -> ListGraph CmmStmt -> UniqSM CmmGraph
-toZgraph _ (ListGraph []) = lgraphOfAGraph emptyAGraph
-toZgraph fun_name g@(ListGraph (BasicBlock id ss : other_blocks)) =
- labelAGraph id $ mkStmts ss <*> foldr addBlock emptyAGraph other_blocks
- where addBlock (BasicBlock id ss) g = mkLabel id <*> mkStmts ss <*> g
+toZgraph :: String -> CmmFormals -> ListGraph CmmStmt -> UniqSM (CmmStackInfo, CmmGraph)
+toZgraph _ _ (ListGraph []) =
+ do g <- lgraphOfAGraph emptyAGraph
+ return ((0, Nothing), g)
+toZgraph fun_name args g@(ListGraph (BasicBlock id ss : other_blocks)) =
+ let (offset, entry) = mkEntry id NativeNodeCall args in
+ do g <- labelAGraph id $
+ entry <*> mkStmts ss <*> foldr addBlock emptyAGraph other_blocks
+ return ((offset, Nothing), g)
+ where addBlock (BasicBlock id ss) g =
+ mkLabel id <*> mkStmts ss <*> g
+ updfr_sz = 0 -- panic "upd frame size lost in cmm conversion"
mkStmts (CmmNop : ss) = mkNop <*> mkStmts ss
mkStmts (CmmComment s : ss) = mkComment s <*> mkStmts ss
mkStmts (CmmAssign l r : ss) = mkAssign l r <*> mkStmts ss
mkStmts (CmmStore l r : ss) = mkStore l r <*> mkStmts ss
- mkStmts (CmmCall (CmmCallee f conv) res args (CmmSafe srt) CmmMayReturn : ss) =
- mkCall f conv res args srt <*> mkStmts ss
+ mkStmts (CmmCall (CmmCallee f conv) res args (CmmSafe _) CmmMayReturn : ss) =
+ mkCall f (conv', conv') (map hintlessCmm res) (map hintlessCmm args) updfr_sz
+ <*> mkStmts ss
+ where conv' = Foreign (ForeignConvention conv [] []) -- JD: DUBIOUS
mkStmts (CmmCall (CmmPrim {}) _ _ (CmmSafe _) _ : _) =
panic "safe call to a primitive CmmPrim CallishMachOp"
mkStmts (CmmCall f res args CmmUnsafe CmmMayReturn : ss) =
- mkUnsafeCall f res args <*> mkStmts ss
+ mkUnsafeCall (convert_target f res args)
+ (strip_hints res) (strip_hints args)
+ <*> mkStmts ss
mkStmts (CmmCondBranch e l : fbranch) =
mkCmmIfThenElse e (mkBranch l) (mkStmts fbranch)
mkStmts (last : []) = mkLast last
mkStmts (_ : _ : _) = bad "last node not at end"
bad msg = pprPanic (msg ++ " in function " ++ fun_name) (ppr g)
mkLast (CmmCall (CmmCallee f conv) [] args _ CmmNeverReturns) =
- mkFinalCall f conv args
+ mkFinalCall f conv (map hintlessCmm args) updfr_sz
mkLast (CmmCall (CmmPrim {}) _ _ _ CmmNeverReturns) =
panic "Call to CmmPrim never returns?!"
mkLast (CmmSwitch scrutinee table) = mkSwitch scrutinee table
- mkLast (CmmJump tgt args) = mkJump tgt args
- mkLast (CmmReturn ress) = mkReturn ress
+ -- SURELY, THESE HINTLESS ARGS ARE WRONG AND WILL BE FIXED WHEN CALLING
+ -- CONVENTIONS ARE HONORED?
+ mkLast (CmmJump tgt args) = mkJump tgt (map hintlessCmm args) updfr_sz
+ mkLast (CmmReturn ress) =
+ mkReturnSimple (map hintlessCmm ress) updfr_sz
mkLast (CmmBranch tgt) = mkBranch tgt
mkLast (CmmCall _f (_:_) _args _ CmmNeverReturns) =
panic "Call never returns but has results?!"
mkLast _ = panic "fell off end of block"
+strip_hints :: [CmmHinted a] -> [a]
+strip_hints = map hintlessCmm
+
+convert_target :: CmmCallTarget -> HintedCmmFormals -> HintedCmmActuals -> MidCallTarget
+convert_target (CmmCallee e cc) ress args = ForeignTarget e (ForeignConvention cc (map cmmHint args) (map cmmHint ress))
+convert_target (CmmPrim op) _ress _args = PrimTarget op
+
+add_hints :: Convention -> ValueDirection -> [a] -> [CmmHinted a]
+add_hints conv vd args = zipWith CmmHinted args (get_hints conv vd)
+
+get_hints :: Convention -> ValueDirection -> [ForeignHint]
+get_hints (Foreign (ForeignConvention _ hints _)) Arguments = hints
+get_hints (Foreign (ForeignConvention _ _ hints)) Results = hints
+get_hints _other_conv _vd = repeat NoHint
+
+get_conv :: MidCallTarget -> Convention
+get_conv (PrimTarget _) = NativeNodeCall -- JD: SUSPICIOUS
+get_conv (ForeignTarget _ fc) = Foreign fc
+
+cmm_target :: MidCallTarget -> CmmCallTarget
+cmm_target (PrimTarget op) = CmmPrim op
+cmm_target (ForeignTarget e (ForeignConvention cc _ _)) = CmmCallee e cc
+
ofZgraph :: CmmGraph -> ListGraph CmmStmt
ofZgraph g = ListGraph $ swallow blocks
where blocks = G.postorder_dfs g
showblocks = "LGraph has " ++ show (length blocks) ++ " blocks:" ++
concat (map (\(G.Block id _) -> " " ++ show id) blocks)
cscomm = "Call successors are" ++
- (concat $ map (\id -> " " ++ show id) $ uniqSetToList call_succs)
+ (concat $ map (\id -> " " ++ show id) $ blockSetToList call_succs)
swallow [] = []
- swallow (G.Block id t : rest) = tail id [] Nothing t rest
- tail id prev' out (G.ZTail (CopyOut conv actuals) t) rest =
- case out of
- Nothing -> tail id prev' (Just (conv, actuals)) t rest
- Just _ -> panic "multiple CopyOut nodes in one basic block"
- tail id prev' out (G.ZTail m t) rest = tail id (mid m : prev') out t rest
- tail id prev' out (G.ZLast G.LastExit) rest = exit id prev' out rest
- tail id prev' out (G.ZLast (G.LastOther l)) rest = last id prev' out l rest
- mid (MidNop) = CmmNop
+ swallow (G.Block id t : rest) = tail id [] t rest
+ tail id prev' (G.ZTail m t) rest = tail id (mid m : prev') t rest
+ tail id prev' (G.ZLast G.LastExit) rest = exit id prev' rest
+ tail id prev' (G.ZLast (G.LastOther l)) rest = last id prev' l rest
mid (MidComment s) = CmmComment s
mid (MidAssign l r) = CmmAssign l r
mid (MidStore l r) = CmmStore l r
- mid (MidUnsafeCall f ress args) = CmmCall f ress args CmmUnsafe CmmMayReturn
- mid m@(CopyOut {}) = pcomment (ppr m)
- mid m@(CopyIn {}) = pcomment (ppr m <+> text "(proc point)")
- pcomment p = scomment $ showSDoc p
+ mid (MidForeignCall _ target ress args)
+ = CmmCall (cmm_target target)
+ (add_hints conv Results ress)
+ (add_hints conv Arguments args)
+ CmmUnsafe CmmMayReturn
+ where
+ conv = get_conv target
block' id prev'
| id == G.lg_entry g = BasicBlock id $ extend_entry (reverse prev')
| otherwise = BasicBlock id $ extend_block id (reverse prev')
- last id prev' out l n =
+ last id prev' l n =
let endblock stmt = block' id (stmt : prev') : swallow n in
case l of
- LastBranch _ (_:_) -> panic "unrepresentable branch"
- LastBranch tgt [] ->
+ LastBranch tgt ->
case n of
- G.Block id' t : bs
- | tgt == id', unique_pred id'
- -> tail id prev' out t bs -- optimize out redundant labels
- _ -> if isNothing out then endblock (CmmBranch tgt)
- else pprPanic "can't convert LGraph with pending CopyOut"
- (ppr g)
+ -- THIS OPT IS WRONG -- LABELS CAN SHOW UP ELSEWHERE IN THE GRAPH
+ --G.Block id' _ t : bs
+ -- | tgt == id', unique_pred id'
+ -- -> tail id prev' t bs -- optimize out redundant labels
+ _ -> endblock (CmmBranch tgt)
LastCondBranch expr tid fid ->
- if isJust out then pprPanic "CopyOut before conditional branch" (ppr g)
- else
case n of
G.Block id' t : bs
+ -- It would be better to handle earlier, but we still must
+ -- generate correct code here.
+ | id' == fid, tid == fid, unique_pred id' ->
+ tail id prev' t bs
| id' == fid, unique_pred id' ->
- tail id (CmmCondBranch expr tid : prev') Nothing t bs
+ tail id (CmmCondBranch expr tid : prev') t bs
| id' == tid, unique_pred id',
Just e' <- maybeInvertCmmExpr expr ->
- tail id (CmmCondBranch e' fid : prev') Nothing t bs
+ tail id (CmmCondBranch e' fid : prev') t bs
_ -> let instrs' = CmmBranch fid : CmmCondBranch expr tid : prev'
in block' id instrs' : swallow n
- LastJump expr params -> endblock $ CmmJump expr params
- LastReturn params -> endblock $ CmmReturn params
LastSwitch arg ids -> endblock $ CmmSwitch arg $ ids
- LastCall e cont
- | Just (conv, args) <- out
- -> let tgt = CmmCallee e (conv_to_cconv conv) in
- case cont of
- Nothing ->
- endblock $ CmmCall tgt [] args CmmUnsafe CmmNeverReturns
- Just k
- | G.Block id' (G.ZTail (CopyIn _ ress srt) t) : bs <- n,
- id' == k, unique_pred k
- -> let call = CmmCall tgt ress args (CmmSafe srt) CmmMayReturn
- in tail id (call : prev') Nothing t bs
- | G.Block id' t : bs <- n, id' == k, unique_pred k
- -> let (ress, srt) = findCopyIn t
- call = CmmCall tgt ress args (CmmSafe srt) CmmMayReturn
- delayed = scomment "delayed CopyIn follows prev. call"
- in tail id (delayed : call : prev') Nothing t bs
- | otherwise -> panic "unrepairable call"
- | otherwise -> panic "call with no CopyOut"
- findCopyIn (G.ZTail (CopyIn _ ress srt) _) = (ress, srt)
- findCopyIn (G.ZTail _ t) = findCopyIn t
- findCopyIn (G.ZLast _) = panic "missing CopyIn after call"
- exit id prev' out n = -- highly irregular (assertion violation?)
+ LastCall e _ _ _ _ -> endblock $ CmmJump e []
+ exit id prev' n = -- highly irregular (assertion violation?)
let endblock stmt = block' id (stmt : prev') : swallow n in
case n of [] -> endblock (scomment "procedure falls off end")
G.Block id' t : bs ->
if unique_pred id' then
- tail id (scomment "went thru exit" : prev') out t bs
+ tail id (scomment "went thru exit" : prev') t bs
else
endblock (CmmBranch id')
- conv_to_cconv (ConventionStandard c _) = c
- conv_to_cconv (ConventionPrivate {}) =
- panic "tried to convert private calling convention back to Cmm"
preds = zipPreds g
single_preds =
let add b single =
let id = G.blockId b
- in case G.lookupBlockEnv preds id of
+ in case lookupBlockEnv preds id of
Nothing -> single
- Just s -> if sizeUniqSet s == 1 then
- G.extendBlockSet single id
+ Just s -> if sizeBlockSet s == 1 then
+ extendBlockSet single id
else single
- in G.fold_blocks add G.emptyBlockSet g
- unique_pred id = G.elemBlockSet id single_preds
+ in G.fold_blocks add emptyBlockSet g
+ unique_pred id = elemBlockSet id single_preds
call_succs =
let add b succs =
case G.last (G.unzip b) of
- G.LastOther (LastCall _ (Just id)) -> extendBlockSet succs id
+ G.LastOther (LastCall _ (Just id) _ _ _) ->
+ extendBlockSet succs id
_ -> succs
in G.fold_blocks add emptyBlockSet g
_is_call_succ id = elemBlockSet id call_succs
projects / ghc-hetmet.git / blobdiff