+#if __GLASGOW_HASKELL__ >= 611
+{-# OPTIONS_GHC -XNoMonoLocalBinds #-}
+#endif
+-- Norman likes local bindings
+
-- This module is pure representation and should be imported only by
-- clients that need to manipulate representation and know what
-- they're doing. Clients that need to create flow graphs should
import CLabel
import FastString
import ForeignCall
-import qualified ZipCfg as Z
import qualified ZipDataflow as DF
import ZipCfg
import MkZipCfg
import BasicTypes
import Maybes
-import Monad
+import Control.Monad
import Outputable
import Prelude hiding (zip, unzip, last)
-import qualified Data.List as L
import SMRep (ByteOff)
import UniqSupply
-- one -> second block etc
-- Undefined outside range, and when there's a Nothing
| LastCall { -- A call (native or safe foreign)
- cml_target :: CmmExpr, -- never a CmmPrim to a CallishMachOp!
- cml_cont :: Maybe BlockId,
+ cml_target :: CmmExpr, -- never a CmmPrim to a CallishMachOp!
+
+ cml_cont :: Maybe BlockId,
-- BlockId of continuation (Nothing for return or tail call)
- cml_args :: ByteOff, -- byte offset for youngest outgoing arg
- -- (includes update frame, which must be younger)
- cml_ret_args:: ByteOff, -- byte offset for youngest incoming arg
- cml_ret_off :: Maybe UpdFrameOffset}
- -- stack offset for return (update frames);
- -- The return offset should be Nothing only if we have to create
- -- a new call, e.g. for a procpoint, in which case it's an invariant
- -- that the call does not stand for a return or a tail call,
- -- and the successor does not need an info table.
-
-data MidCallTarget -- The target of a MidUnsafeCall
- = ForeignTarget -- A foreign procedure
- CmmExpr -- Its address
- ForeignConvention -- Its calling convention
-
- | PrimTarget -- A possibly-side-effecting machine operation
- CallishMachOp -- Which one
+
+ cml_args :: ByteOff,
+ -- Byte offset, from the *old* end of the Area associated with
+ -- the BlockId (if cml_cont = Nothing, then Old area), of
+ -- youngest outgoing arg. Set the stack pointer to this before
+ -- transferring control.
+ -- (NB: an update frame might also have been stored in the Old
+ -- area, but it'll be in an older part than the args.)
+
+ cml_ret_args :: ByteOff,
+ -- For calls *only*, the byte offset for youngest returned value
+ -- This is really needed at the *return* point rather than here
+ -- at the call, but in practice it's convenient to record it here.
+
+ cml_ret_off :: Maybe ByteOff
+ -- For calls *only*, the byte offset of the base of the frame that
+ -- must be described by the info table for the return point.
+ -- The older words are an update frames, which have their own
+ -- info-table and layout information
+
+ -- From a liveness point of view, the stack words older than
+ -- cml_ret_off are treated as live, even if the sequel of
+ -- the call goes into a loop.
+ }
+
+data MidCallTarget -- The target of a MidUnsafeCall
+ = ForeignTarget -- A foreign procedure
+ CmmExpr -- Its address
+ ForeignConvention -- Its calling convention
+
+ | PrimTarget -- A possibly-side-effecting machine operation
+ CallishMachOp -- Which one
deriving Eq
data Convention
- = Native -- Native C-- call/return
+ = NativeDirectCall -- Native C-- call skipping the node (closure) argument
+
+ | NativeNodeCall -- Native C-- call including the node argument
+
+ | NativeReturn -- Native C-- return
+
+ | Slow -- Slow entry points: all args pushed on the stack
- | Slow -- Slow entry points: all args pushed on the stack
+ | GC -- Entry to the garbage collector: uses the node reg!
- | GC -- Entry to the garbage collector: uses the node reg!
+ | PrimOpCall -- Calling prim ops
- | PrimOp -- Calling prim ops
+ | PrimOpReturn -- Returning from prim ops
- | Foreign -- Foreign call/return
- ForeignConvention
+ | Foreign -- Foreign call/return
+ ForeignConvention
| Private
-- Used for control transfers within a (pre-CPS) procedure All
= Unsafe -- unsafe call
| Safe BlockId -- making infotable requires: 1. label
UpdFrameOffset -- 2. where the upd frame is
+ Bool -- is the call interruptible?
deriving Eq
data ValueDirection = Arguments | Results
foldRegsUsed f z (ForeignTarget e _) = foldRegsUsed f z e
instance UserOfSlots MidCallTarget where
+ foldSlotsUsed f z (ForeignTarget e _) = foldSlotsUsed f z e
foldSlotsUsed _f z (PrimTarget _) = z
- foldSlotsUsed f z (ForeignTarget e _) = foldSlotsUsed f z e
instance (UserOfLocalRegs a) => UserOfLocalRegs (Maybe a) where
foldRegsUsed f z (Just x) = foldRegsUsed f z x
-- call "ccall" foo(x, y)[r1, r2];
-- ToDo ppr volatile
MidForeignCall safety target results args ->
- hsep [ if null results
- then empty
- else parens (commafy $ map ppr results) <+> equals,
- ppr_safety safety,
+ hsep [ ppUnless (null results) $
+ parens (commafy $ map ppr results) <+> equals,
+ ppr_safety safety,
ptext $ sLit "call",
ppr_call_target target <> parens (commafy $ map ppr args) <> semi]
MidForeignCall {} -> text "MidForeignCall"
ppr_fc :: ForeignConvention -> SDoc
-ppr_fc (ForeignConvention c _ _) = doubleQuotes (ppr c)
+ppr_fc (ForeignConvention c args res) =
+ doubleQuotes (ppr c) <+> text "args: " <+> ppr args <+> text " results: " <+> ppr res
ppr_safety :: ForeignSafety -> SDoc
-ppr_safety (Safe bid upd) = text "safe<" <> ppr bid <> text ", " <> ppr upd <> text ">"
+ppr_safety (Safe bid upd interruptible) =
+ text (if interruptible then "interruptible" else "safe") <>
+ text "<" <> ppr bid <> text ", " <> ppr upd <> text ">"
ppr_safety Unsafe = text "unsafe"
ppr_call_target :: MidCallTarget -> SDoc
ppr_call_target (ForeignTarget fn c) = ppr_fc c <+> ppr_target fn
-ppr_call_target (PrimTarget op) = ppr (CmmLabel (mkForeignLabel (mkFastString (show op)) Nothing False IsFunction))
+ppr_call_target (PrimTarget op)
+ -- HACK: We're just using a ForeignLabel to get this printed, the label
+ -- might not really be foreign.
+ = ppr (CmmLabel (mkForeignLabel
+ (mkFastString (show op))
+ Nothing ForeignLabelInThisPackage IsFunction))
ppr_target :: CmmExpr -> SDoc
ppr_target t@(CmmLit _) = ppr t
]
pprConvention :: Convention -> SDoc
-pprConvention (Native {}) = text "<native-convention>"
-pprConvention Slow = text "<slow-convention>"
-pprConvention GC = text "<gc-convention>"
-pprConvention PrimOp = text "<primop-convention>"
-pprConvention (Foreign c) = ppr c
-pprConvention (Private {}) = text "<private-convention>"
+pprConvention (NativeNodeCall {}) = text "<native-node-call-convention>"
+pprConvention (NativeDirectCall {}) = text "<native-direct-call-convention>"
+pprConvention (NativeReturn {}) = text "<native-ret-convention>"
+pprConvention Slow = text "<slow-convention>"
+pprConvention GC = text "<gc-convention>"
+pprConvention PrimOpCall = text "<primop-call-convention>"
+pprConvention PrimOpReturn = text "<primop-ret-convention>"
+pprConvention (Foreign c) = ppr c
+pprConvention (Private {}) = text "<private-convention>"
pprForeignConvention :: ForeignConvention -> SDoc
pprForeignConvention (ForeignConvention c as rs) = ppr c <> ppr as <> ppr rs
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