PprCmm.hs 20.9 KB
Newer Older
1 2 3 4
----------------------------------------------------------------------------
--
-- Pretty-printing of Cmm as (a superset of) C--
--
Simon Marlow's avatar
Simon Marlow committed
5
-- (c) The University of Glasgow 2004-2006
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
--
-----------------------------------------------------------------------------

--
-- This is where we walk over Cmm emitting an external representation,
-- suitable for parsing, in a syntax strongly reminiscent of C--. This
-- is the "External Core" for the Cmm layer.
--
-- As such, this should be a well-defined syntax: we want it to look nice.
-- Thus, we try wherever possible to use syntax defined in [1],
-- "The C-- Reference Manual", http://www.cminusminus.org/. We differ
-- slightly, in some cases. For one, we use I8 .. I64 for types, rather
-- than C--'s bits8 .. bits64.
--
-- We try to ensure that all information available in the abstract
-- syntax is reproduced, or reproducible, in the concrete syntax.
-- Data that is not in printed out can be reconstructed according to
-- conventions used in the pretty printer. There are at least two such
-- cases:
--      1) if a value has wordRep type, the type is not appended in the
--      output.
--      2) MachOps that operate over wordRep type are printed in a
--      C-style, rather than as their internal MachRep name.
--
-- These conventions produce much more readable Cmm output.
--
-- A useful example pass over Cmm is in nativeGen/MachCodeGen.hs
--

35
module PprCmm
36 37
    ( writeCmms, pprCmms, pprCmm, pprStmt, pprExpr, 
      pprSection, pprStatic, pprLit
38 39
    )
where
40

41
import BlockId
42
import Cmm
Simon Marlow's avatar
Simon Marlow committed
43 44
import CmmUtils
import CLabel
45
import BasicTypes
46

47

Simon Marlow's avatar
Simon Marlow committed
48
import ForeignCall
49
import Outputable
Simon Marlow's avatar
Simon Marlow committed
50
import FastString
51

Simon Marlow's avatar
Simon Marlow committed
52 53 54
import Data.List
import System.IO
import Data.Maybe
55

56 57 58
-- Temp Jan08
import SMRep
import ClosureInfo
Simon Marlow's avatar
Simon Marlow committed
59
#include "../includes/rts/storage/FunTypes.h"
60 61


62
pprCmms :: (Outputable info, Outputable g) => [GenCmm CmmStatic info g] -> SDoc
63 64
pprCmms cmms = pprCode CStyle (vcat (intersperse separator $ map ppr cmms))
        where
Ian Lynagh's avatar
Ian Lynagh committed
65
          separator = space $$ ptext (sLit "-------------------") $$ space
66 67 68 69 70 71

writeCmms :: Handle -> [Cmm] -> IO ()
writeCmms handle cmms = printForC handle (pprCmms cmms)

-----------------------------------------------------------------------------

72 73
instance (Outputable d, Outputable info, Outputable g)
    => Outputable (GenCmm d info g) where
74 75
    ppr c = pprCmm c

76 77
instance (Outputable d, Outputable info, Outputable i)
	=> Outputable (GenCmmTop d info i) where
78 79
    ppr t = pprTop t

80
instance (Outputable instr) => Outputable (ListGraph instr) where
81 82
    ppr (ListGraph blocks) = vcat (map ppr blocks)

83
instance (Outputable instr) => Outputable (GenBasicBlock instr) where
84 85 86 87 88 89 90 91 92 93 94
    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

95 96 97
instance Outputable CmmLit where
    ppr l = pprLit l

98 99 100
instance Outputable LocalReg where
    ppr e = pprLocalReg e

101 102 103
instance Outputable Area where
    ppr e = pprArea e

104 105 106
instance Outputable GlobalReg where
    ppr e = pprGlobalReg e

107 108 109 110 111 112
instance Outputable CmmStatic where
    ppr e = pprStatic e

instance Outputable CmmInfo where
    ppr e = pprInfo e

113 114


115 116
-----------------------------------------------------------------------------

117
pprCmm :: (Outputable d, Outputable info, Outputable g) => GenCmm d info g -> SDoc
118 119 120
pprCmm (Cmm tops) = vcat $ intersperse (text "") $ map pprTop tops

-- --------------------------------------------------------------------------
121
-- Top level `procedure' blocks.
122
--
123 124
pprTop 	:: (Outputable d, Outputable info, Outputable i)
	=> GenCmmTop d info i -> SDoc
125

126
pprTop (CmmProc info lbl params graph )
127

128
  = vcat [ pprCLabel lbl <> parens (commafy $ map ppr params)
129
         , nest 8 $ lbrace <+> ppr info $$ rbrace
130
         , nest 4 $ ppr graph
131 132 133 134 135 136 137 138
         , rbrace ]

-- --------------------------------------------------------------------------
-- We follow [1], 4.5
--
--      section "data" { ... }
--
pprTop (CmmData section ds) = 
139
    (hang (pprSection section <+> lbrace) 4 (vcat (map ppr ds)))
140 141
    $$ rbrace

142 143
-- --------------------------------------------------------------------------
instance Outputable CmmSafety where
Ian Lynagh's avatar
Ian Lynagh committed
144
  ppr CmmUnsafe = ptext (sLit "_unsafe_call_")
145
  ppr (CmmSafe srt) = ppr srt
146 147 148 149 150 151 152 153

-- --------------------------------------------------------------------------
-- 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".
154 155
pprInfo :: CmmInfo -> SDoc
pprInfo (CmmInfo _gc_target update_frame CmmNonInfoTable) =
Ian Lynagh's avatar
Ian Lynagh committed
156
    vcat [{-ptext (sLit "gc_target: ") <>
157
                maybe (ptext (sLit "<none>")) ppr gc_target,-}
Ian Lynagh's avatar
Ian Lynagh committed
158 159
          ptext (sLit "update_frame: ") <>
                maybe (ptext (sLit "<none>")) pprUpdateFrame update_frame]
160
pprInfo (CmmInfo _gc_target update_frame
161
         (CmmInfoTable stat_clos (ProfilingInfo closure_type closure_desc) tag info)) =
Ian Lynagh's avatar
Ian Lynagh committed
162
    vcat [{-ptext (sLit "gc_target: ") <>
163 164
                maybe (ptext (sLit "<none>")) ppr gc_target,-}
          ptext (sLit "has static closure: ") <> ppr stat_clos <+>
Ian Lynagh's avatar
Ian Lynagh committed
165 166 167 168 169
          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),
170 171
          pprTypeInfo info]

172
pprTypeInfo :: ClosureTypeInfo -> SDoc
173
pprTypeInfo (ConstrInfo layout constr descr) =
Ian Lynagh's avatar
Ian Lynagh committed
174 175 176
    vcat [ptext (sLit "ptrs: ") <> integer (toInteger (fst layout)),
          ptext (sLit "nptrs: ") <> integer (toInteger (snd layout)),
          ptext (sLit "constructor: ") <> integer (toInteger constr),
177
          pprLit descr]
178
pprTypeInfo (FunInfo layout srt arity _args slow_entry) =
Ian Lynagh's avatar
Ian Lynagh committed
179 180 181
    vcat [ptext (sLit "ptrs: ") <> integer (toInteger (fst layout)),
          ptext (sLit "nptrs: ") <> integer (toInteger (snd layout)),
          ptext (sLit "srt: ") <> ppr srt,
182 183 184
-- Temp Jan08
          ptext (sLit ("fun_type: ")) <> integer (toInteger (argDescrType _args)),

Ian Lynagh's avatar
Ian Lynagh committed
185 186 187
          ptext (sLit "arity: ") <> integer (toInteger arity),
          --ptext (sLit "args: ") <> ppr args, -- TODO: needs to be printed
          ptext (sLit "slow: ") <> pprLit slow_entry
188 189
         ]
pprTypeInfo (ThunkInfo layout srt) =
Ian Lynagh's avatar
Ian Lynagh committed
190 191 192
    vcat [ptext (sLit "ptrs: ") <> integer (toInteger (fst layout)),
          ptext (sLit "nptrs: ") <> integer (toInteger (snd layout)),
          ptext (sLit "srt: ") <> ppr srt]
193
pprTypeInfo (ThunkSelectorInfo offset srt) =
Ian Lynagh's avatar
Ian Lynagh committed
194 195
    vcat [ptext (sLit "ptrs: ") <> integer (toInteger offset),
          ptext (sLit "srt: ") <> ppr srt]
196
pprTypeInfo (ContInfo stack srt) =
Ian Lynagh's avatar
Ian Lynagh committed
197 198
    vcat [ptext (sLit "stack: ") <> ppr stack,
          ptext (sLit "srt: ") <> ppr srt]
199

200 201 202 203 204 205 206 207 208 209 210 211 212 213
-- Temp Jan08
argDescrType :: ArgDescr -> StgHalfWord
-- The "argument type" RTS field type
argDescrType (ArgSpec n) = n
argDescrType (ArgGen liveness)
  | isBigLiveness liveness = ARG_GEN_BIG
  | otherwise		   = ARG_GEN

-- Temp Jan08
isBigLiveness :: Liveness -> Bool
isBigLiveness (BigLiveness _)   = True
isBigLiveness (SmallLiveness _) = False


214 215
pprUpdateFrame :: UpdateFrame -> SDoc
pprUpdateFrame (UpdateFrame expr args) = 
Ian Lynagh's avatar
Ian Lynagh committed
216
    hcat [ ptext (sLit "jump")
217 218 219 220 221 222 223 224 225 226
         , space
         , if isTrivialCmmExpr expr
                then pprExpr expr
                else case expr of
                    CmmLoad (CmmReg _) _ -> pprExpr expr 
                    _ -> parens (pprExpr expr)
         , space
         , parens  ( commafy $ map ppr args ) ]


227 228 229
-- --------------------------------------------------------------------------
-- Basic blocks look like assembly blocks.
--      lbl: stmt ; stmt ; .. 
230
pprBBlock :: Outputable stmt => GenBasicBlock stmt -> SDoc
231
pprBBlock (BasicBlock ident stmts) =
232
    hang (ppr ident <> colon) 4 (vcat (map ppr stmts))
233 234 235 236 237 238 239 240 241 242

-- --------------------------------------------------------------------------
-- Statements. C-- usually, exceptions to this should be obvious.
--
pprStmt :: CmmStmt -> SDoc    
pprStmt stmt = case stmt of

    -- ;
    CmmNop -> semi

243
    --  // text
244 245 246 247 248 249 250 251
    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
252
          rep = ppr ( cmmExprType expr )
253 254 255

    -- call "ccall" foo(x, y)[r1, r2];
    -- ToDo ppr volatile
256
    CmmCall (CmmCallee fn cconv) results args safety ret ->
257 258 259 260 261 262 263
        sep  [ pp_lhs <+> pp_conv
	     , nest 2 (pprExpr9 fn <> 
		       parens (commafy (map ppr_ar args)))
               <> brackets (ppr safety)
             , case ret of CmmMayReturn -> empty
                           CmmNeverReturns -> ptext $ sLit (" never returns")
             ] <> semi
264
        where
265 266
	  pp_lhs | null results = empty
		 | otherwise    = commafy (map ppr_ar results) <+> equals
267
		-- Don't print the hints on a native C-- call
268 269 270 271
	  ppr_ar (CmmHinted ar k) = case cconv of
			    CmmCallConv -> ppr ar
			    _           -> ppr (ar,k)
	  pp_conv = case cconv of
272
		      CmmCallConv -> empty
273
		      _           -> ptext (sLit("foreign")) <+> doubleQuotes (ppr cconv)
274

275
    CmmCall (CmmPrim op) results args safety ret ->
276
        pprStmt (CmmCall (CmmCallee (CmmLit lbl) CCallConv)
277
                        results args safety ret)
278
        where
279
          lbl = CmmLabel (mkForeignLabel (mkFastString (show op)) Nothing False IsFunction)
280 281 282 283

    CmmBranch ident          -> genBranch ident
    CmmCondBranch expr ident -> genCondBranch expr ident
    CmmJump expr params      -> genJump expr params
284
    CmmReturn params         -> genReturn params
285 286
    CmmSwitch arg ids        -> genSwitch arg ids

287 288 289 290 291 292 293 294 295 296 297 298
instance Outputable ForeignHint where
  ppr NoHint     = empty
  ppr SignedHint = quotes(text "signed")
--  ppr AddrHint   = quotes(text "address")
-- Temp Jan08
  ppr AddrHint   = (text "PtrHint")

-- Just look like a tuple, since it was a tuple before
-- ... is that a good idea? --Isaac Dupree
instance (Outputable a) => Outputable (CmmHinted a) where
  ppr (CmmHinted a k) = ppr (a, k)

299 300 301 302 303 304 305
-- --------------------------------------------------------------------------
-- goto local label. [1], section 6.6
--
--     goto lbl;
--
genBranch :: BlockId -> SDoc
genBranch ident = 
306
    ptext (sLit "goto") <+> ppr ident <> semi
307 308 309 310 311 312 313 314

-- --------------------------------------------------------------------------
-- Conditional. [1], section 6.4
--
--     if (expr) { goto lbl; } 
--
genCondBranch :: CmmExpr -> BlockId -> SDoc
genCondBranch expr ident =
Ian Lynagh's avatar
Ian Lynagh committed
315
    hsep [ ptext (sLit "if")
316
         , parens(ppr expr)
Ian Lynagh's avatar
Ian Lynagh committed
317
         , ptext (sLit "goto")
318
         , ppr ident <> semi ]
319 320 321 322 323 324

-- --------------------------------------------------------------------------
-- A tail call. [1], Section 6.9
--
--     jump foo(a, b, c);
--
325
genJump :: CmmExpr -> [CmmHinted CmmExpr] -> SDoc
326
genJump expr args = 
Ian Lynagh's avatar
Ian Lynagh committed
327
    hcat [ ptext (sLit "jump")
328 329 330 331 332 333
         , space
         , if isTrivialCmmExpr expr
                then pprExpr expr
                else case expr of
                    CmmLoad (CmmReg _) _ -> pprExpr expr 
                    _ -> parens (pprExpr expr)
334
         , space
335
         , parens  ( commafy $ map ppr args )
336 337
         , semi ]

338

339 340 341 342 343
-- --------------------------------------------------------------------------
-- Return from a function. [1], Section 6.8.2 of version 1.128
--
--     return (a, b, c);
--
344
genReturn :: [CmmHinted CmmExpr] -> SDoc
345
genReturn args = 
Ian Lynagh's avatar
Ian Lynagh committed
346
    hcat [ ptext (sLit "return")
347 348 349
         , space
         , parens  ( commafy $ map ppr args )
         , semi ]
350 351 352 353 354 355 356 357 358 359 360

-- --------------------------------------------------------------------------
-- 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 

361
    = let pairs = groupBy snds (zip [0 .. ] maybe_ids )
362

Ian Lynagh's avatar
Ian Lynagh committed
363
      in hang (hcat [ ptext (sLit "switch [0 .. ") 
364
                    , int (length maybe_ids - 1)
Ian Lynagh's avatar
Ian Lynagh committed
365
                    , ptext (sLit "] ")
366 367 368
                    , if isTrivialCmmExpr expr
                        then pprExpr expr
                        else parens (pprExpr expr)
Ian Lynagh's avatar
Ian Lynagh committed
369
                    , ptext (sLit " {") 
370 371 372 373 374 375
                    ]) 
            4 (vcat ( map caseify pairs )) $$ rbrace

    where
      snds a b = (snd a) == (snd b)

376
      caseify :: [(Int,Maybe BlockId)] -> SDoc
377
      caseify ixs@((_,Nothing):_)
Ian Lynagh's avatar
Ian Lynagh committed
378 379
        = ptext (sLit "/* impossible: ") <> hcat (intersperse comma (map (int.fst) ixs))
		<> ptext (sLit " */")
380 381
      caseify as 
        = let (is,ids) = unzip as 
Ian Lynagh's avatar
Ian Lynagh committed
382
          in hsep [ ptext (sLit "case")
383
                  , hcat (punctuate comma (map int is))
Ian Lynagh's avatar
Ian Lynagh committed
384
                  , ptext (sLit ": goto")
385
                  , ppr (head [ id | Just id <- ids]) <> semi ]
386 387 388 389 390 391 392 393 394 395 396

-- --------------------------------------------------------------------------
-- Expressions
--

pprExpr :: CmmExpr -> SDoc
pprExpr e 
    = case e of
        CmmRegOff reg i -> 
		pprExpr (CmmMachOp (MO_Add rep)
			   [CmmReg reg, CmmLit (CmmInt (fromIntegral i) rep)])
397
		where rep = typeWidth (cmmRegType reg)
398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
	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 '>=' '>' '<=' '<' '!=' '=='
415
pprExpr1, pprExpr7, pprExpr8 :: CmmExpr -> SDoc
416 417 418 419
pprExpr1 (CmmMachOp op [x,y]) | Just doc <- infixMachOp1 op
   = pprExpr7 x <+> doc <+> pprExpr7 y
pprExpr1 e = pprExpr7 e

420 421
infixMachOp1, infixMachOp7, infixMachOp8 :: MachOp -> Maybe SDoc

Ian Lynagh's avatar
Ian Lynagh committed
422 423 424 425 426 427
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 "<="))
428 429 430 431 432
infixMachOp1 (MO_U_Gt   _) = Just (char '>')
infixMachOp1 (MO_U_Lt   _) = Just (char '<')
infixMachOp1 _             = Nothing

-- %left '-' '+'
433 434
pprExpr7 (CmmMachOp (MO_Add rep1) [x, CmmLit (CmmInt i rep2)]) | i < 0
   = pprExpr7 (CmmMachOp (MO_Sub rep1) [x, CmmLit (CmmInt (negate i) rep2)])
435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
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
459 460
        CmmRegOff  reg off  -> parens (ppr reg <+> char '+' <+> int off)
        CmmStackSlot a off  -> parens (ppr a   <+> char '+' <+> int off)
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
	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))

481 482 483 484
   | 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,
485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508

--
-- 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)
509
             , (if rep == wordWidth
510 511 512 513 514 515
                    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
516 517
    CmmLabelDiffOff clbl1 clbl2 i -> pprCLabel clbl1 <> char '-'  
                                  <> pprCLabel clbl2 <> ppr_offset i
518 519
    CmmBlock id        -> ppr id
    CmmHighStackMark -> text "<highSp>"
520

521 522 523
pprLit1 :: CmmLit -> SDoc
pprLit1 lit@(CmmLabelOff {}) = parens (pprLit lit)
pprLit1 lit                  = pprLit lit
524 525 526 527 528 529 530 531 532 533 534 535 536 537

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
Ian Lynagh's avatar
Ian Lynagh committed
538
    CmmStaticLit lit   -> nest 4 $ ptext (sLit "const") <+> pprLit lit <> semi
539 540 541
    CmmUninitialised i -> nest 4 $ text "I8" <> brackets (int i)
    CmmAlign i         -> nest 4 $ text "align" <+> int i
    CmmDataLabel clbl  -> pprCLabel clbl <> colon
542
    CmmString s'       -> nest 4 $ text "I8[]" <+> text (show s')
543 544 545 546 547 548 549

-- --------------------------------------------------------------------------
-- Registers, whether local (temps) or global
--
pprReg :: CmmReg -> SDoc
pprReg r 
    = case r of
550
        CmmLocal  local  -> pprLocalReg  local
551 552 553 554 555 556
        CmmGlobal global -> pprGlobalReg global

--
-- We only print the type of the local reg if it isn't wordRep
--
pprLocalReg :: LocalReg -> SDoc
557 558 559 560 561 562 563 564 565 566 567 568
pprLocalReg (LocalReg uniq rep) 
--   = ppr rep <> char '_' <> ppr uniq
-- Temp Jan08
   = char '_' <> ppr uniq <> 
       (if isWord32 rep -- && not (isGcPtrType rep) -- Temp Jan08		-- sigh
                    then dcolon <> ptr <> ppr rep
                    else dcolon <> ptr <> ppr rep)
   where
     ptr = empty
	 --if isGcPtrType rep
	 --      then doubleQuotes (text "ptr")
         --      else empty
569

570 571
-- Stack areas
pprArea :: Area -> SDoc
572 573 574 575 576 577
pprArea (RegSlot r)   = hcat [ text "slot<", ppr r, text ">" ]
pprArea (CallArea id) = pprAreaId id

pprAreaId :: AreaId -> SDoc
pprAreaId Old        = text "old"
pprAreaId (Young id) = hcat [ text "young<", ppr id, text ">" ]
578

579 580 581 582 583
-- needs to be kept in syn with Cmm.hs.GlobalReg
--
pprGlobalReg :: GlobalReg -> SDoc
pprGlobalReg gr 
    = case gr of
584 585 586 587
        VanillaReg n _ -> char 'R' <> int n
-- Temp Jan08
--        VanillaReg n VNonGcPtr -> char 'R' <> int n
--        VanillaReg n VGcPtr    -> char 'P' <> int n
588 589 590
        FloatReg   n   -> char 'F' <> int n
        DoubleReg  n   -> char 'D' <> int n
        LongReg    n   -> char 'L' <> int n
Ian Lynagh's avatar
Ian Lynagh committed
591 592 593 594 595 596 597
        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")
598
        EagerBlackholeInfo -> ptext (sLit "stg_EAGER_BLACKHOLE_info")
Ian Lynagh's avatar
Ian Lynagh committed
599 600 601 602
        GCEnter1       -> ptext (sLit "stg_gc_enter_1")
        GCFun          -> ptext (sLit "stg_gc_fun")
        BaseReg        -> ptext (sLit "BaseReg")
        PicBaseReg     -> ptext (sLit "PicBaseReg")
603 604 605 606 607 608

-- --------------------------------------------------------------------------
-- data sections
--
pprSection :: Section -> SDoc
pprSection s = case s of
Ian Lynagh's avatar
Ian Lynagh committed
609 610 611 612
    Text              -> section <+> doubleQuotes (ptext (sLit "text"))
    Data              -> section <+> doubleQuotes (ptext (sLit "data"))
    ReadOnlyData      -> section <+> doubleQuotes (ptext (sLit "readonly"))
    ReadOnlyData16    -> section <+> doubleQuotes (ptext (sLit "readonly16"))
613
    RelocatableReadOnlyData
Ian Lynagh's avatar
Ian Lynagh committed
614 615
                      -> section <+> doubleQuotes (ptext (sLit "relreadonly"))
    UninitialisedData -> section <+> doubleQuotes (ptext (sLit "uninitialised"))
616 617
    OtherSection s'   -> section <+> doubleQuotes (text s')
 where
Ian Lynagh's avatar
Ian Lynagh committed
618 619
    section = ptext (sLit "section")

620 621 622
-----------------------------------------------------------------------------

commafy :: [SDoc] -> SDoc
623
commafy xs = fsep $ punctuate comma xs