-- (c) The University of Glasgow 2004-2006
--
-----------------------------------------------------------------------------
-
--
--- This is where we walk over Cmm emitting an external representation,
+-- This is where we walk over CmmNode emitting an external representation,
-- suitable for parsing, in a syntax strongly reminiscent of C--. This
-- is the "External Core" for the Cmm layer.
--
-- These conventions produce much more readable Cmm output.
--
-- A useful example pass over Cmm is in nativeGen/MachCodeGen.hs
---
-
-module PprCmm (
- writeCmms, pprCmms, pprCmm, pprStmt, pprExpr
- ) where
-#include "HsVersions.h"
+{-# LANGUAGE GADTs, TypeFamilies, FlexibleContexts #-}
+module PprCmm
+ ( module PprCmmDecl
+ , module PprCmmExpr
+ )
+where
-import Cmm
-import CmmUtils
-import MachOp
+import BlockId ()
import CLabel
-
-import ForeignCall
-import Unique
-import Outputable
+import Cmm
+import CmmExpr
+import CmmUtils (isTrivialCmmExpr)
import FastString
+import Outputable
+import PprCmmDecl
+import PprCmmExpr
+import Util
+import BasicTypes
+import Compiler.Hoopl
import Data.List
-import System.IO
-import Data.Maybe
-
-pprCmms :: (Outputable info) => [GenCmm CmmStatic info CmmStmt] -> SDoc
-pprCmms cmms = pprCode CStyle (vcat (intersperse separator $ map ppr cmms))
- where
- separator = space $$ ptext SLIT("-------------------") $$ space
-
-writeCmms :: Handle -> [Cmm] -> IO ()
-writeCmms handle cmms = printForC handle (pprCmms cmms)
-
------------------------------------------------------------------------------
-
-instance (Outputable info) => Outputable (GenCmm CmmStatic info CmmStmt) where
- ppr c = pprCmm c
-
-instance (Outputable info) => Outputable (GenCmmTop CmmStatic info CmmStmt) where
- ppr t = pprTop t
-
-instance Outputable CmmBasicBlock where
- ppr b = pprBBlock b
-
-instance Outputable CmmStmt where
- ppr s = pprStmt s
-
-instance Outputable CmmExpr where
- ppr e = pprExpr e
-
-instance Outputable CmmReg where
- ppr e = pprReg e
-
-instance Outputable LocalReg where
- ppr e = pprLocalReg e
-
-instance Outputable GlobalReg where
- ppr e = pprGlobalReg e
-
-instance Outputable CmmStatic where
- ppr e = pprStatic e
-
-instance Outputable CmmInfo where
- ppr e = pprInfo e
-
------------------------------------------------------------------------------
-
-pprCmm :: (Outputable info) => GenCmm CmmStatic info CmmStmt -> SDoc
-pprCmm (Cmm tops) = vcat $ intersperse (text "") $ map pprTop tops
-
--- --------------------------------------------------------------------------
--- Top level `procedure' blocks.
---
-pprTop :: (Outputable info) => GenCmmTop CmmStatic info CmmStmt -> SDoc
-pprTop (CmmProc info lbl params blocks )
-
- = vcat [ pprCLabel lbl <> parens (commafy $ map ppr params) <+> lbrace
- , nest 8 $ lbrace <+> ppr info $$ rbrace
- , nest 4 $ vcat (map ppr blocks)
- , rbrace ]
-
--- --------------------------------------------------------------------------
--- We follow [1], 4.5
---
--- section "data" { ... }
---
-pprTop (CmmData section ds) =
- (hang (pprSection section <+> lbrace) 4 (vcat (map pprStatic ds)))
- $$ rbrace
-
--- --------------------------------------------------------------------------
-instance Outputable CmmSafety where
- ppr CmmUnsafe = ptext SLIT("_unsafe_call_")
- ppr (CmmSafe srt) = ppr srt
-
--- --------------------------------------------------------------------------
--- Info tables. The current pretty printer needs refinement
--- but will work for now.
---
--- For ideas on how to refine it, they used to be printed in the
--- style of C--'s 'stackdata' declaration, just inside the proc body,
--- and were labelled with the procedure name ++ "_info".
-pprInfo (CmmInfo gc_target update_frame CmmNonInfoTable) =
- vcat [ptext SLIT("gc_target: ") <>
- maybe (ptext SLIT("<none>")) pprBlockId gc_target,
- ptext SLIT("update_frame: ") <>
- maybe (ptext SLIT("<none>")) pprUpdateFrame update_frame]
-pprInfo (CmmInfo gc_target update_frame
- (CmmInfoTable (ProfilingInfo closure_type closure_desc) tag info)) =
- vcat [ptext SLIT("gc_target: ") <>
- maybe (ptext SLIT("<none>")) pprBlockId gc_target,
- ptext SLIT("update_frame: ") <>
- maybe (ptext SLIT("<none>")) pprUpdateFrame update_frame,
- ptext SLIT("type: ") <> pprLit closure_type,
- ptext SLIT("desc: ") <> pprLit closure_desc,
- ptext SLIT("tag: ") <> integer (toInteger tag),
- pprTypeInfo info]
-
-pprTypeInfo (ConstrInfo layout constr descr) =
- vcat [ptext SLIT("ptrs: ") <> integer (toInteger (fst layout)),
- ptext SLIT("nptrs: ") <> integer (toInteger (snd layout)),
- ptext SLIT("constructor: ") <> integer (toInteger constr),
- pprLit descr]
-pprTypeInfo (FunInfo layout srt fun_type arity args slow_entry) =
- vcat [ptext SLIT("ptrs: ") <> integer (toInteger (fst layout)),
- ptext SLIT("nptrs: ") <> integer (toInteger (snd layout)),
- ptext SLIT("srt: ") <> ppr srt,
- ptext SLIT("fun_type: ") <> integer (toInteger fun_type),
- ptext SLIT("arity: ") <> integer (toInteger arity),
- --ppr args, -- TODO: needs to be printed
- ptext SLIT("slow: ") <> pprLit slow_entry
- ]
-pprTypeInfo (ThunkInfo layout srt) =
- vcat [ptext SLIT("ptrs: ") <> integer (toInteger (fst layout)),
- ptext SLIT("nptrs: ") <> integer (toInteger (snd layout)),
- ptext SLIT("srt: ") <> ppr srt]
-pprTypeInfo (ThunkSelectorInfo offset srt) =
- vcat [ptext SLIT("ptrs: ") <> integer (toInteger offset),
- ptext SLIT("srt: ") <> ppr srt]
-pprTypeInfo (ContInfo stack srt) =
- vcat [ptext SLIT("stack: ") <> ppr stack,
- ptext SLIT("srt: ") <> ppr srt]
-
-pprUpdateFrame :: UpdateFrame -> SDoc
-pprUpdateFrame (UpdateFrame expr args) =
- hcat [ ptext SLIT("jump")
- , space
- , if isTrivialCmmExpr expr
- then pprExpr expr
- else case expr of
- CmmLoad (CmmReg _) _ -> pprExpr expr
- _ -> parens (pprExpr expr)
- , space
- , parens ( commafy $ map ppr args ) ]
-
-
--- --------------------------------------------------------------------------
--- Basic blocks look like assembly blocks.
--- lbl: stmt ; stmt ; ..
-pprBBlock :: CmmBasicBlock -> SDoc
-pprBBlock (BasicBlock ident stmts) =
- hang (pprBlockId ident <> colon) 4 (vcat (map ppr stmts))
-
--- --------------------------------------------------------------------------
--- Statements. C-- usually, exceptions to this should be obvious.
---
-pprStmt :: CmmStmt -> SDoc
-pprStmt stmt = case stmt of
-
- -- ;
- CmmNop -> semi
-
- -- // text
- CmmComment s -> text "//" <+> ftext s
-
- -- reg = expr;
- CmmAssign reg expr -> ppr reg <+> equals <+> ppr expr <> semi
-
- -- rep[lv] = expr;
- CmmStore lv expr -> rep <> brackets(ppr lv) <+> equals <+> ppr expr <> semi
- where
- rep = ppr ( cmmExprRep expr )
-
- -- call "ccall" foo(x, y)[r1, r2];
- -- ToDo ppr volatile
- CmmCall (CmmForeignCall fn cconv) results args safety ->
- hcat [ if null results
- then empty
- else parens (commafy $ map ppr results) <>
- ptext SLIT(" = "),
- ptext SLIT("call"), space,
- doubleQuotes(ppr cconv), space,
- target fn, parens ( commafy $ map ppr args ),
- brackets (ppr safety), semi ]
- where
- target (CmmLit lit) = pprLit lit
- target fn' = parens (ppr fn')
-
- CmmCall (CmmPrim op) results args safety ->
- pprStmt (CmmCall (CmmForeignCall (CmmLit lbl) CCallConv)
- results args safety)
- where
- lbl = CmmLabel (mkForeignLabel (mkFastString (show op)) Nothing False)
-
- CmmBranch ident -> genBranch ident
- CmmCondBranch expr ident -> genCondBranch expr ident
- CmmJump expr params -> genJump expr params
- CmmReturn params -> genReturn params
- CmmSwitch arg ids -> genSwitch arg ids
-
--- --------------------------------------------------------------------------
--- goto local label. [1], section 6.6
---
--- goto lbl;
---
-genBranch :: BlockId -> SDoc
-genBranch ident =
- ptext SLIT("goto") <+> pprBlockId ident <> semi
-
--- --------------------------------------------------------------------------
--- Conditional. [1], section 6.4
---
--- if (expr) { goto lbl; }
---
-genCondBranch :: CmmExpr -> BlockId -> SDoc
-genCondBranch expr ident =
- hsep [ ptext SLIT("if")
- , parens(ppr expr)
- , ptext SLIT("goto")
- , pprBlockId ident <> semi ]
-
--- --------------------------------------------------------------------------
--- A tail call. [1], Section 6.9
---
--- jump foo(a, b, c);
---
-genJump :: CmmExpr -> [(CmmExpr, MachHint)] -> SDoc
-genJump expr args =
-
- hcat [ ptext SLIT("jump")
- , space
- , if isTrivialCmmExpr expr
- then pprExpr expr
- else case expr of
- CmmLoad (CmmReg _) _ -> pprExpr expr
- _ -> parens (pprExpr expr)
- , space
- , parens ( commafy $ map ppr args )
- , semi ]
-
--- --------------------------------------------------------------------------
--- Return from a function. [1], Section 6.8.2 of version 1.128
---
--- return (a, b, c);
---
-genReturn :: [(CmmExpr, MachHint)] -> SDoc
-genReturn args =
-
- hcat [ ptext SLIT("return")
- , space
- , parens ( commafy $ map ppr args )
- , semi ]
-
--- --------------------------------------------------------------------------
--- Tabled jump to local label
---
--- The syntax is from [1], section 6.5
---
--- switch [0 .. n] (expr) { case ... ; }
---
-genSwitch :: CmmExpr -> [Maybe BlockId] -> SDoc
-genSwitch expr maybe_ids
-
- = let pairs = groupBy snds (zip [0 .. ] maybe_ids )
-
- in hang (hcat [ ptext SLIT("switch [0 .. ")
- , int (length maybe_ids - 1)
- , ptext SLIT("] ")
- , if isTrivialCmmExpr expr
- then pprExpr expr
- else parens (pprExpr expr)
- , ptext SLIT(" {")
- ])
- 4 (vcat ( map caseify pairs )) $$ rbrace
-
- where
- snds a b = (snd a) == (snd b)
-
- caseify :: [(Int,Maybe BlockId)] -> SDoc
- caseify ixs@((i,Nothing):_)
- = ptext SLIT("/* impossible: ") <> hcat (intersperse comma (map (int.fst) ixs))
- <> ptext SLIT(" */")
- caseify as
- = let (is,ids) = unzip as
- in hsep [ ptext SLIT("case")
- , hcat (punctuate comma (map int is))
- , ptext SLIT(": goto")
- , pprBlockId (head [ id | Just id <- ids]) <> semi ]
-
--- --------------------------------------------------------------------------
--- Expressions
---
-
-pprExpr :: CmmExpr -> SDoc
-pprExpr e
- = case e of
- CmmRegOff reg i ->
- pprExpr (CmmMachOp (MO_Add rep)
- [CmmReg reg, CmmLit (CmmInt (fromIntegral i) rep)])
- where rep = cmmRegRep reg
- CmmLit lit -> pprLit lit
- _other -> pprExpr1 e
-
--- Here's the precedence table from CmmParse.y:
--- %nonassoc '>=' '>' '<=' '<' '!=' '=='
--- %left '|'
--- %left '^'
--- %left '&'
--- %left '>>' '<<'
--- %left '-' '+'
--- %left '/' '*' '%'
--- %right '~'
-
--- We just cope with the common operators for now, the rest will get
--- a default conservative behaviour.
-
--- %nonassoc '>=' '>' '<=' '<' '!=' '=='
-pprExpr1 (CmmMachOp op [x,y]) | Just doc <- infixMachOp1 op
- = pprExpr7 x <+> doc <+> pprExpr7 y
-pprExpr1 e = pprExpr7 e
-
-infixMachOp1 (MO_Eq _) = Just (ptext SLIT("=="))
-infixMachOp1 (MO_Ne _) = Just (ptext SLIT("!="))
-infixMachOp1 (MO_Shl _) = Just (ptext SLIT("<<"))
-infixMachOp1 (MO_U_Shr _) = Just (ptext SLIT(">>"))
-infixMachOp1 (MO_U_Ge _) = Just (ptext SLIT(">="))
-infixMachOp1 (MO_U_Le _) = Just (ptext SLIT("<="))
-infixMachOp1 (MO_U_Gt _) = Just (char '>')
-infixMachOp1 (MO_U_Lt _) = Just (char '<')
-infixMachOp1 _ = Nothing
-
--- %left '-' '+'
-pprExpr7 (CmmMachOp (MO_Add rep1) [x, CmmLit (CmmInt i rep2)]) | i < 0
- = pprExpr7 (CmmMachOp (MO_Sub rep1) [x, CmmLit (CmmInt (negate i) rep2)])
-pprExpr7 (CmmMachOp op [x,y]) | Just doc <- infixMachOp7 op
- = pprExpr7 x <+> doc <+> pprExpr8 y
-pprExpr7 e = pprExpr8 e
-
-infixMachOp7 (MO_Add _) = Just (char '+')
-infixMachOp7 (MO_Sub _) = Just (char '-')
-infixMachOp7 _ = Nothing
-
--- %left '/' '*' '%'
-pprExpr8 (CmmMachOp op [x,y]) | Just doc <- infixMachOp8 op
- = pprExpr8 x <+> doc <+> pprExpr9 y
-pprExpr8 e = pprExpr9 e
-
-infixMachOp8 (MO_U_Quot _) = Just (char '/')
-infixMachOp8 (MO_Mul _) = Just (char '*')
-infixMachOp8 (MO_U_Rem _) = Just (char '%')
-infixMachOp8 _ = Nothing
-
-pprExpr9 :: CmmExpr -> SDoc
-pprExpr9 e =
- case e of
- CmmLit lit -> pprLit1 lit
- CmmLoad expr rep -> ppr rep <> brackets( ppr expr )
- CmmReg reg -> ppr reg
- CmmRegOff reg off -> parens (ppr reg <+> char '+' <+> int off)
- CmmMachOp mop args -> genMachOp mop args
-
-genMachOp :: MachOp -> [CmmExpr] -> SDoc
-genMachOp mop args
- | Just doc <- infixMachOp mop = case args of
- -- dyadic
- [x,y] -> pprExpr9 x <+> doc <+> pprExpr9 y
-
- -- unary
- [x] -> doc <> pprExpr9 x
-
- _ -> pprTrace "PprCmm.genMachOp: machop with strange number of args"
- (pprMachOp mop <+>
- parens (hcat $ punctuate comma (map pprExpr args)))
- empty
-
- | isJust (infixMachOp1 mop)
- || isJust (infixMachOp7 mop)
- || isJust (infixMachOp8 mop) = parens (pprExpr (CmmMachOp mop args))
-
- | otherwise = char '%' <> ppr_op <> parens (commafy (map pprExpr args))
- where ppr_op = text (map (\c -> if c == ' ' then '_' else c)
- (show mop))
- -- replace spaces in (show mop) with underscores,
-
---
--- Unsigned ops on the word size of the machine get nice symbols.
--- All else get dumped in their ugly format.
---
-infixMachOp :: MachOp -> Maybe SDoc
-infixMachOp mop
- = case mop of
- MO_And _ -> Just $ char '&'
- MO_Or _ -> Just $ char '|'
- MO_Xor _ -> Just $ char '^'
- MO_Not _ -> Just $ char '~'
- MO_S_Neg _ -> Just $ char '-' -- there is no unsigned neg :)
- _ -> Nothing
-
--- --------------------------------------------------------------------------
--- Literals.
--- To minimise line noise we adopt the convention that if the literal
--- has the natural machine word size, we do not append the type
---
-pprLit :: CmmLit -> SDoc
-pprLit lit = case lit of
- CmmInt i rep ->
- hcat [ (if i < 0 then parens else id)(integer i)
- , (if rep == wordRep
- then empty
- else space <> dcolon <+> ppr rep) ]
-
- CmmFloat f rep -> hsep [ rational f, dcolon, ppr rep ]
- CmmLabel clbl -> pprCLabel clbl
- CmmLabelOff clbl i -> pprCLabel clbl <> ppr_offset i
- CmmLabelDiffOff clbl1 clbl2 i -> pprCLabel clbl1 <> char '-'
- <> pprCLabel clbl2 <> ppr_offset i
-
-pprLit1 lit@(CmmLabelOff clbl i) = parens (pprLit lit)
-pprLit1 lit = pprLit lit
-
-ppr_offset :: Int -> SDoc
-ppr_offset i
- | i==0 = empty
- | i>=0 = char '+' <> int i
- | otherwise = char '-' <> int (-i)
-
--- --------------------------------------------------------------------------
--- Static data.
--- Strings are printed as C strings, and we print them as I8[],
--- following C--
---
-pprStatic :: CmmStatic -> SDoc
-pprStatic s = case s of
- CmmStaticLit lit -> nest 4 $ ptext SLIT("const") <+> pprLit lit <> semi
- CmmUninitialised i -> nest 4 $ text "I8" <> brackets (int i)
- CmmAlign i -> nest 4 $ text "align" <+> int i
- CmmDataLabel clbl -> pprCLabel clbl <> colon
- CmmString s' -> nest 4 $ text "I8[]" <+> text (show s')
-
--- --------------------------------------------------------------------------
--- Registers, whether local (temps) or global
---
-pprReg :: CmmReg -> SDoc
-pprReg r
- = case r of
- CmmLocal local -> pprLocalReg local
- CmmGlobal global -> pprGlobalReg global
-
---
--- We only print the type of the local reg if it isn't wordRep
---
-pprLocalReg :: LocalReg -> SDoc
-pprLocalReg (LocalReg uniq rep follow)
- = hcat [ char '_', ppr uniq, ty ] where
- ty = if rep == wordRep && follow == KindNonPtr
- then empty
- else dcolon <> ptr <> ppr rep
- ptr = if follow == KindNonPtr
- then empty
- else doubleQuotes (text "ptr")
-
--- needs to be kept in syn with Cmm.hs.GlobalReg
---
-pprGlobalReg :: GlobalReg -> SDoc
-pprGlobalReg gr
- = case gr of
- VanillaReg n -> char 'R' <> int n
- FloatReg n -> char 'F' <> int n
- DoubleReg n -> char 'D' <> int n
- LongReg n -> char 'L' <> int n
- Sp -> ptext SLIT("Sp")
- SpLim -> ptext SLIT("SpLim")
- Hp -> ptext SLIT("Hp")
- HpLim -> ptext SLIT("HpLim")
- CurrentTSO -> ptext SLIT("CurrentTSO")
- CurrentNursery -> ptext SLIT("CurrentNursery")
- HpAlloc -> ptext SLIT("HpAlloc")
- GCEnter1 -> ptext SLIT("stg_gc_enter_1")
- GCFun -> ptext SLIT("stg_gc_fun")
- BaseReg -> ptext SLIT("BaseReg")
- PicBaseReg -> ptext SLIT("PicBaseReg")
-
--- --------------------------------------------------------------------------
--- data sections
---
-pprSection :: Section -> SDoc
-pprSection s = case s of
- Text -> section <+> doubleQuotes (ptext SLIT("text"))
- Data -> section <+> doubleQuotes (ptext SLIT("data"))
- ReadOnlyData -> section <+> doubleQuotes (ptext SLIT("readonly"))
- RelocatableReadOnlyData
- -> section <+> doubleQuotes (ptext SLIT("relreadonly"))
- UninitialisedData -> section <+> doubleQuotes (ptext SLIT("uninitialised"))
- OtherSection s' -> section <+> doubleQuotes (text s')
- where
- section = ptext SLIT("section")
-
--- --------------------------------------------------------------------------
--- Basic block ids
---
-pprBlockId :: BlockId -> SDoc
-pprBlockId b = ppr $ getUnique b
-
------------------------------------------------------------------------------
-
-commafy :: [SDoc] -> SDoc
-commafy xs = hsep $ punctuate comma xs
-
+import Prelude hiding (succ)
+
+-------------------------------------------------
+-- Outputable instances
+
+instance Outputable CmmStackInfo where
+ ppr = pprStackInfo
+
+instance Outputable CmmTopInfo where
+ ppr = pprTopInfo
+
+
+instance Outputable (CmmNode e x) where
+ ppr = pprNode
+
+instance Outputable Convention where
+ ppr = pprConvention
+
+instance Outputable ForeignConvention where
+ ppr = pprForeignConvention
+
+instance Outputable ForeignTarget where
+ ppr = pprForeignTarget
+
+
+instance Outputable (Block CmmNode C C) where
+ ppr = pprBlock
+instance Outputable (Block CmmNode C O) where
+ ppr = pprBlock
+instance Outputable (Block CmmNode O C) where
+ ppr = pprBlock
+instance Outputable (Block CmmNode O O) where
+ ppr = pprBlock
+
+instance Outputable (Graph CmmNode e x) where
+ ppr = pprGraph
+
+instance Outputable CmmGraph where
+ ppr = pprCmmGraph
+
+----------------------------------------------------------
+-- Outputting types Cmm contains
+
+pprStackInfo :: CmmStackInfo -> SDoc
+pprStackInfo (StackInfo {arg_space=arg_space, updfr_space=updfr_space}) =
+ ptext (sLit "arg_space: ") <> ppr arg_space <+>
+ ptext (sLit "updfr_space: ") <> ppr updfr_space
+
+pprTopInfo :: CmmTopInfo -> SDoc
+pprTopInfo (TopInfo {info_tbl=info_tbl, stack_info=stack_info}) =
+ vcat [ptext (sLit "info_tbl: ") <> ppr info_tbl,
+ ptext (sLit "stack_info: ") <> ppr stack_info]
+
+----------------------------------------------------------
+-- Outputting blocks and graphs
+
+pprBlock :: IndexedCO x SDoc SDoc ~ SDoc => Block CmmNode e x -> IndexedCO e SDoc SDoc
+pprBlock block = foldBlockNodesB3 ( ($$) . ppr
+ , ($$) . (nest 4) . ppr
+ , ($$) . (nest 4) . ppr
+ )
+ block
+ empty
+
+pprGraph :: Graph CmmNode e x -> SDoc
+pprGraph GNil = empty
+pprGraph (GUnit block) = ppr block
+pprGraph (GMany entry body exit)
+ = text "{"
+ $$ nest 2 (pprMaybeO entry $$ (vcat $ map ppr $ bodyToBlockList body) $$ pprMaybeO exit)
+ $$ text "}"
+ where pprMaybeO :: Outputable (Block CmmNode e x) => MaybeO ex (Block CmmNode e x) -> SDoc
+ pprMaybeO NothingO = empty
+ pprMaybeO (JustO block) = ppr block
+
+pprCmmGraph :: CmmGraph -> SDoc
+pprCmmGraph g
+ = text "{" <> text "offset"
+ $$ nest 2 (vcat $ map ppr blocks)
+ $$ text "}"
+ where blocks = postorderDfs g
+
+---------------------------------------------
+-- Outputting CmmNode and types which it contains
+
+pprConvention :: Convention -> SDoc
+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
+
+pprForeignTarget :: ForeignTarget -> SDoc
+pprForeignTarget (ForeignTarget fn c) = ppr_fc c <+> ppr_target fn
+ where ppr_fc :: ForeignConvention -> SDoc
+ ppr_fc (ForeignConvention c args res) =
+ doubleQuotes (ppr c) <+> text "arg hints: " <+> ppr args <+> text " result hints: " <+> ppr res
+ ppr_target :: CmmExpr -> SDoc
+ ppr_target t@(CmmLit _) = ppr t
+ ppr_target fn' = parens (ppr fn')
+
+pprForeignTarget (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))
+pprNode :: CmmNode e x -> SDoc
+pprNode node = pp_node <+> pp_debug
+ where
+ pp_node :: SDoc
+ pp_node = case node of
+ -- label:
+ CmmEntry id -> ppr id <> colon
+
+ -- // text
+ CmmComment s -> text "//" <+> ftext s
+
+ -- reg = expr;
+ CmmAssign reg expr -> ppr reg <+> equals <+> ppr expr <> semi
+
+ -- rep[lv] = expr;
+ CmmStore lv expr -> rep <> brackets(ppr lv) <+> equals <+> ppr expr <> semi
+ where
+ rep = ppr ( cmmExprType expr )
+
+ -- call "ccall" foo(x, y)[r1, r2];
+ -- ToDo ppr volatile
+ CmmUnsafeForeignCall target results args ->
+ hsep [ ppUnless (null results) $
+ parens (commafy $ map ppr results) <+> equals,
+ ptext $ sLit "call",
+ ppr target <> parens (commafy $ map ppr args) <> semi]
+
+ -- goto label;
+ CmmBranch ident -> ptext (sLit "goto") <+> ppr ident <> semi
+
+ -- if (expr) goto t; else goto f;
+ CmmCondBranch expr t f ->
+ hsep [ ptext (sLit "if")
+ , parens(ppr expr)
+ , ptext (sLit "goto")
+ , ppr t <> semi
+ , ptext (sLit "else goto")
+ , ppr f <> semi
+ ]
+
+ CmmSwitch expr maybe_ids ->
+ hang (hcat [ ptext (sLit "switch [0 .. ")
+ , int (length maybe_ids - 1)
+ , ptext (sLit "] ")
+ , if isTrivialCmmExpr expr then ppr expr else parens (ppr expr)
+ , ptext (sLit " {")
+ ])
+ 4 (vcat ( map caseify pairs )) $$ rbrace
+ where pairs = groupBy snds (zip [0 .. ] maybe_ids )
+ snds a b = (snd a) == (snd b)
+ caseify ixs@((_,Nothing):_) = ptext (sLit "/* impossible: ")
+ <> hcat (intersperse comma (map (int.fst) ixs)) <> ptext (sLit " */")
+ caseify as = let (is,ids) = unzip as
+ in hsep [ ptext (sLit "case")
+ , hcat (punctuate comma (map int is))
+ , ptext (sLit ": goto")
+ , ppr (head [ id | Just id <- ids]) <> semi ]
+
+ CmmCall tgt k out res updfr_off ->
+ hcat [ ptext (sLit "call"), space
+ , pprFun tgt, ptext (sLit "(...)"), space
+ , ptext (sLit "returns to") <+> ppr k <+> parens (ppr out)
+ <+> parens (ppr res)
+ , ptext (sLit " with update frame") <+> ppr updfr_off
+ , semi ]
+ where pprFun f@(CmmLit _) = ppr f
+ pprFun f = parens (ppr f)
+
+ CmmForeignCall {tgt=t, res=rs, args=as, succ=s, updfr=u, intrbl=i} ->
+ hcat $ if i then [ptext (sLit "interruptible"), space] else [] ++
+ [ ptext (sLit "foreign call"), space
+ , ppr t, ptext (sLit "(...)"), space
+ , ptext (sLit "returns to") <+> ppr s
+ <+> ptext (sLit "args:") <+> parens (ppr as)
+ <+> ptext (sLit "ress:") <+> parens (ppr rs)
+ , ptext (sLit " with update frame") <+> ppr u
+ , semi ]
+
+ pp_debug :: SDoc
+ pp_debug =
+ if not debugIsOn then empty
+ else case node of
+ CmmEntry {} -> empty -- Looks terrible with text " // CmmEntry"
+ CmmComment {} -> empty -- Looks also terrible with text " // CmmComment"
+ CmmAssign {} -> text " // CmmAssign"
+ CmmStore {} -> text " // CmmStore"
+ CmmUnsafeForeignCall {} -> text " // CmmUnsafeForeignCall"
+ CmmBranch {} -> text " // CmmBranch"
+ CmmCondBranch {} -> text " // CmmCondBranch"
+ CmmSwitch {} -> text " // CmmSwitch"
+ CmmCall {} -> text " // CmmCall"
+ CmmForeignCall {} -> text " // CmmForeignCall"
+
+ commafy :: [SDoc] -> SDoc
+ commafy xs = hsep $ punctuate comma xs
projects / ghc-hetmet.git / blobdiff