-- complain to Norman Ramsey.
module MkZipCfgCmm
- ( mkNop, mkAssign, mkStore, mkCall, mkUnsafeCall, mkFinalCall
- , mkJump, mkCbranch, mkSwitch, mkReturn, mkComment, mkCmmIfThenElse
- , mkCmmWhileDo
- , (<*>), mkLabel, mkBranch
+ ( mkNop, mkAssign, mkStore, mkCall, mkCmmCall, mkUnsafeCall, mkFinalCall
+ , mkJump, mkCbranch, mkSwitch, mkReturn, mkComment, copyIn, copyOut, mkEntry
+ , mkCmmIfThenElse, mkCmmIfThen, mkCmmWhileDo
+ , mkAddToContext
+ , (<*>), catAGraphs, mkLabel, mkBranch
, emptyAGraph, withFreshLabel, withUnique, outOfLine
, lgraphOfAGraph, graphOfAGraph, labelAGraph
, CmmZ, CmmTopZ, CmmGraph, CmmBlock, CmmAGraph, Middle, Last, Convention(..)
#include "HsVersions.h"
+import BlockId
import CmmExpr
import Cmm ( GenCmm(..), GenCmmTop(..), CmmStatic, CmmInfo
- , CmmCallTarget(..), CmmActuals, CmmFormals
+ , CmmCallTarget(..), CmmActuals, CmmFormals, CmmFormalsWithoutKinds
+ , CmmKinded (..)
)
+import MachOp (MachHint(..), wordRep)
import ZipCfgCmmRep hiding (CmmGraph, CmmAGraph, CmmBlock, CmmZ, CmmTopZ)
-- ^ to make this module more self-contained, these definitions are duplicated below
import PprCmm()
type CmmZ = GenCmm CmmStatic CmmInfo CmmGraph
type CmmTopZ = GenCmmTop CmmStatic CmmInfo CmmGraph
+---------- No-ops
mkNop :: CmmAGraph
+mkComment :: FastString -> CmmAGraph
+
+---------- Assignment and store
mkAssign :: CmmReg -> CmmExpr -> CmmAGraph
mkStore :: CmmExpr -> CmmExpr -> CmmAGraph
+
+---------- Calls
mkCall :: CmmExpr -> CCallConv -> CmmFormals -> CmmActuals -> C_SRT -> CmmAGraph
+mkCmmCall :: CmmExpr -> CmmFormals -> CmmActuals -> C_SRT -> CmmAGraph
+ -- Native C-- calling convention
mkUnsafeCall :: CmmCallTarget -> CmmFormals -> CmmActuals -> CmmAGraph
mkFinalCall :: CmmExpr -> CCallConv -> CmmActuals -> CmmAGraph
-- Never returns; like exit() or barf()
-mkJump :: CmmExpr -> CmmActuals -> CmmAGraph
-mkCbranch :: CmmExpr -> BlockId -> BlockId -> CmmAGraph
-mkSwitch :: CmmExpr -> [Maybe BlockId] -> CmmAGraph
-mkReturn :: CmmActuals -> CmmAGraph
-mkComment :: FastString -> CmmAGraph
--- Not to be forgotten, but exported by MkZipCfg:
---mkBranch :: BlockId -> CmmAGraph
---mkLabel :: BlockId -> CmmAGraph
+---------- Context manipulation ('return via')
+mkAddToContext :: CmmExpr -> [CmmExpr] -> CmmAGraph
+
+---------- Control transfer
+mkJump :: Area -> CmmExpr -> CmmActuals -> CmmAGraph
+mkCbranch :: CmmExpr -> BlockId -> BlockId -> CmmAGraph
+mkSwitch :: CmmExpr -> [Maybe BlockId] -> CmmAGraph
+mkReturn :: Area -> CmmActuals -> CmmAGraph
+
mkCmmIfThenElse :: CmmExpr -> CmmAGraph -> CmmAGraph -> CmmAGraph
-mkCmmWhileDo :: CmmExpr -> CmmAGraph -> CmmAGraph
+mkCmmIfThen :: CmmExpr -> CmmAGraph -> CmmAGraph
+mkCmmWhileDo :: CmmExpr -> CmmAGraph -> CmmAGraph
+
+-- Not to be forgotten, but exported by MkZipCfg:
+-- mkBranch :: BlockId -> CmmAGraph
+-- mkLabel :: BlockId -> CmmAGraph
+-- outOfLine :: CmmAGraph -> CmmAGraph
+-- withUnique :: (Unique -> CmmAGraph) -> CmmAGraph
+-- withFreshLabel :: String -> (BlockId -> CmmAGraph) -> CmmAGraph
--------------------------------------------------------------------------
+mkCmmWhileDo e = mkWhileDo (mkCbranch e)
mkCmmIfThenElse e = mkIfThenElse (mkCbranch e)
-mkCmmWhileDo e = mkWhileDo (mkCbranch e)
+
+mkCmmIfThen e tbranch
+ = withFreshLabel "end of if" $ \endif ->
+ withFreshLabel "start of then" $ \tid ->
+ mkCbranch e tid endif <*>
+ mkLabel tid <*> tbranch <*> mkBranch endif <*>
+ mkLabel endif
+
-- ================ IMPLEMENTATION ================--
-mkNop = mkMiddle $ MidNop
+mkNop = emptyAGraph
mkComment fs = mkMiddle $ MidComment fs
mkAssign l r = mkMiddle $ MidAssign l r
mkStore l r = mkMiddle $ MidStore l r
mkSwitch e tbl = mkLast $ LastSwitch e tbl
mkUnsafeCall tgt results actuals = mkMiddle $ MidUnsafeCall tgt results actuals
-
-cmmArgConv, cmmResConv :: Convention
-cmmArgConv = ConventionStandard CmmCallConv Arguments
-cmmResConv = ConventionStandard CmmCallConv Arguments
-
-mkJump e actuals = mkMiddle (CopyOut cmmArgConv actuals) <*> mkLast (LastJump e)
-mkReturn actuals = mkMiddle (CopyOut cmmResConv actuals) <*> mkLast LastReturn
-
-mkFinalCall f conv actuals =
- mkMiddle (CopyOut (ConventionStandard conv Arguments) actuals) <*>
- mkLast (LastCall f Nothing)
-
-mkCall f conv results actuals srt =
- withFreshLabel "call successor" $ \k ->
- mkMiddle (CopyOut (ConventionStandard conv Arguments) actuals) <*>
- mkLast (LastCall f (Just k)) <*>
- mkLabel k <*>
- mkMiddle (CopyIn (ConventionStandard conv Results) results srt)
+mkAddToContext ra actuals = mkMiddle $ MidAddToContext ra actuals
+
+cmmResConv :: Convention
+cmmResConv = ConventionStandard CmmCallConv Results
+
+copyIn :: Convention -> Area -> CmmFormals -> [Middle]
+copyIn _ area formals = reverse $ snd $ foldl ci (1, []) formals
+ where ci (n, ms) v = (n+1, MidAssign (CmmLocal $ kindlessCmm v)
+ (CmmLoad (CmmStackSlot area n) wordRep) : ms)
+
+copyOut :: Convention -> Area -> CmmActuals -> [Middle]
+copyOut conv area actuals = moveSP conv $ snd $ foldl co (1, []) actuals
+ where moveSP (ConventionStandard _ Arguments) args =
+ MidAssign spReg (outgoingSlot area) : reverse args
+ moveSP _ args = reverse $ MidAssign spReg (outgoingSlot area) : args
+ co (n, ms) v = (n+1, MidStore (CmmStackSlot area n) (kindlessCmm v) : ms)
+mkEntry :: Area -> Convention -> CmmFormalsWithoutKinds -> [Middle]
+mkEntry area conv formals = copyIn conv area fs
+ where fs = map (\f -> CmmKinded f NoHint) formals
+
+-- I'm not sure how to get the calling conventions right yet,
+-- and I suspect this should not be resolved until sometime after
+-- Simon's patch is applied.
+-- For now, I apply a bogus calling convention: all arguments go on the
+-- stack, using the same amount of stack space.
+lastWithArgs' :: BlockId -> Area -> Convention -> CmmActuals -> Maybe CmmFormals ->
+ (BlockId -> Last) -> CmmAGraph
+lastWithArgs' k area conv actuals formals toLast =
+ (mkMiddles $ copyOut conv area actuals) <*>
+ -- adjust the sp
+ mkLast (toLast k) <*>
+ case formals of
+ Just formals -> mkLabel k <*> (mkMiddles $ copyIn conv area formals)
+ Nothing -> emptyAGraph
+lastWithArgs :: Convention -> CmmActuals -> Maybe CmmFormals -> (BlockId -> Last) -> CmmAGraph
+lastWithArgs c a f l =
+ withFreshLabel "call successor" $ \k -> lastWithArgs' k (mkCallArea k a f) c a f l
+
+always :: a -> b -> a
+always x _ = x
+
+-- The area created for the jump and return arguments is the same area as the
+-- procedure entry.
+mkJump area e actuals =
+ lastWithArgs' (areaId area) area cmmResConv actuals Nothing $ always $ LastJump e
+mkReturn area actuals =
+ lastWithArgs' (areaId area) area cmmResConv actuals Nothing $ always LastReturn
+
+mkFinalCall f conv actuals =
+ lastWithArgs (ConventionStandard conv Arguments) actuals Nothing
+ $ always $ LastCall f Nothing --mkFinalCall f conv actuals =
+
+mkCmmCall f results actuals srt = mkCall f CmmCallConv results actuals srt
+
+-- I'm dropping the SRT, but that should be okay: we plan to reconstruct it later.
+mkCall f conv results actuals _ =
+ lastWithArgs (ConventionStandard conv Arguments) actuals (Just results)
+ $ \k -> LastCall f (Just k)
projects / ghc-hetmet.git / blobdiff