2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
4 %************************************************************************
6 \section[PprAbsC]{Pretty-printing Abstract~C}
8 %************************************************************************
11 #include "HsVersions.h"
17 , pprAmode -- otherwise, not exported
22 import AbsCLoop -- break its dependence on ClosureInfo
26 import AbsCUtils ( getAmodeRep, nonemptyAbsC,
27 mixedPtrLocn, mixedTypeLocn
29 import CgCompInfo ( spARelToInt, spBRelToInt, mIN_UPD_SIZE )
30 import CLabel ( externallyVisibleCLabel, mkErrorStdEntryLabel,
31 isReadOnly, needsCDecl, pprCLabel,
32 CLabel{-instance Ord-}
34 import CmdLineOpts ( opt_SccProfilingOn )
35 import CostCentre ( uppCostCentre, uppCostCentreDecl )
36 import Costs ( costs, addrModeCosts, CostRes(..), Side(..) )
37 import CStrings ( stringToC )
38 import FiniteMap ( addToFM, emptyFM, lookupFM )
39 import HeapOffs ( isZeroOff, subOff, pprHeapOffset )
40 import Literal ( showLiteral, Literal(..) )
41 import Maybes ( maybeToBool, catMaybes )
42 import PprStyle ( PprStyle(..) )
43 import Pretty ( prettyToUn )
44 import PrimOp ( primOpNeedsWrapper, pprPrimOp, PrimOp(..) )
45 import PrimRep ( isFloatingRep, showPrimRep, PrimRep(..) )
46 import SMRep ( getSMInfoStr, getSMInitHdrStr, getSMUpdInplaceHdrStr,
47 isConstantRep, isSpecRep, isPhantomRep
49 import Unique ( pprUnique, Unique{-instance NamedThing-} )
50 import UniqSet ( emptyUniqSet, elementOfUniqSet,
51 addOneToUniqSet, UniqSet(..)
53 import Unpretty -- ********** NOTE **********
54 import Util ( nOfThem, panic, assertPanic )
59 For spitting out the costs of an abstract~C expression, @writeRealC@
60 now not only prints the C~code of the @absC@ arg but also adds a macro
61 call to a cost evaluation function @GRAN_EXEC@. For that,
62 @pprAbsC@ has a new ``costs'' argument. %% HWL
65 writeRealC :: _FILE -> AbstractC -> IO ()
68 = uppAppendFile file 80 (
69 uppAbove (pprAbsC PprForC absC (costs absC)) (uppChar '\n')
72 dumpRealC :: AbstractC -> String
76 uppAbove (pprAbsC PprForC absC (costs absC)) (uppChar '\n')
80 This emits the macro, which is used in GrAnSim to compute the total costs
81 from a cost 5 tuple. %% HWL
84 emitMacro :: CostRes -> Unpretty
89 emitMacro (Cost (i,b,l,s,f))
90 = uppBesides [ uppStr "GRAN_EXEC(",
91 uppInt i, uppComma, uppInt b, uppComma, uppInt l, uppComma,
92 uppInt s, uppComma, uppInt f, pp_paren_semi ]
97 pp_paren_semi = uppStr ");"
99 -- ---------------------------------------------------------------------------
100 -- New type: Now pprAbsC also takes the costs for evaluating the Abstract C
101 -- code as an argument (that's needed when spitting out the GRAN_EXEC macro
102 -- which must be done before the return i.e. inside absC code) HWL
103 -- ---------------------------------------------------------------------------
105 pprAbsC :: PprStyle -> AbstractC -> CostRes -> Unpretty
107 pprAbsC sty AbsCNop _ = uppNil
108 pprAbsC sty (AbsCStmts s1 s2) c = uppAbove (pprAbsC sty s1 c) (pprAbsC sty s2 c)
110 pprAbsC sty (CClosureUpdInfo info) c
113 pprAbsC sty (CAssign dest src) _ = pprAssign sty (getAmodeRep dest) dest src
115 pprAbsC sty (CJump target) c
116 = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <--++ CJump */"-} ])
117 (uppBesides [ uppStr "JMP_(", pprAmode sty target, pp_paren_semi ])
119 pprAbsC sty (CFallThrough target) c
120 = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <--++ CFallThrough */"-} ])
121 (uppBesides [ uppStr "JMP_(", pprAmode sty target, pp_paren_semi ])
123 -- --------------------------------------------------------------------------
124 -- Spit out GRAN_EXEC macro immediately before the return HWL
126 pprAbsC sty (CReturn am return_info) c
127 = uppAbove (uppBesides [emitMacro c {-WDP:, uppStr "/* <---- CReturn */"-} ])
128 (uppBesides [uppStr "JMP_(", target, pp_paren_semi ])
130 target = case return_info of
131 DirectReturn -> uppBesides [uppStr "DIRECT(", pprAmode sty am, uppRparen]
132 DynamicVectoredReturn am' -> mk_vector (pprAmode sty am')
133 StaticVectoredReturn n -> mk_vector (uppInt n) -- Always positive
134 mk_vector x = uppBesides [uppLparen, pprAmode sty am, uppStr ")[RVREL(", x, uppStr ")]"]
136 pprAbsC sty (CSplitMarker) _ = uppPStr SLIT("/* SPLIT */")
138 -- we optimise various degenerate cases of CSwitches.
140 -- --------------------------------------------------------------------------
141 -- Assume: CSwitch is also end of basic block
142 -- costs function yields nullCosts for whole switch
143 -- ==> inherited costs c are those of basic block up to switch
144 -- ==> inherit c + costs for the corresponding branch
146 -- --------------------------------------------------------------------------
148 pprAbsC sty (CSwitch discrim [] deflt) c
149 = pprAbsC sty deflt (c + costs deflt)
150 -- Empty alternative list => no costs for discrim as nothing cond. here HWL
152 pprAbsC sty (CSwitch discrim [(tag,alt_code)] deflt) c -- only one alt
153 = case (nonemptyAbsC deflt) of
154 Nothing -> -- one alt and no default
155 pprAbsC sty alt_code (c + costs alt_code)
156 -- Nothing conditional in here either HWL
158 Just dc -> -- make it an "if"
159 do_if_stmt sty discrim tag alt_code dc c
161 pprAbsC sty (CSwitch discrim [(tag1@(MachInt i1 _), alt_code1),
162 (tag2@(MachInt i2 _), alt_code2)] deflt) c
163 | empty_deflt && ((i1 == 0 && i2 == 1) || (i1 == 1 && i2 == 0))
165 do_if_stmt sty discrim tag1 alt_code1 alt_code2 c
167 do_if_stmt sty discrim tag2 alt_code2 alt_code1 c
169 empty_deflt = not (maybeToBool (nonemptyAbsC deflt))
171 pprAbsC sty (CSwitch discrim alts deflt) c -- general case
172 | isFloatingRep (getAmodeRep discrim)
173 = pprAbsC sty (foldr ( \ a -> CSwitch discrim [a]) deflt alts) c
176 uppBesides [uppStr "switch (", pp_discrim, uppStr ") {"],
177 uppNest 2 (uppAboves (map (ppr_alt sty) alts)),
178 (case (nonemptyAbsC deflt) of
181 uppNest 2 (uppAboves [uppPStr SLIT("default:"),
182 pprAbsC sty dc (c + switch_head_cost
184 uppPStr SLIT("break;")])),
188 = pprAmode sty discrim
190 ppr_alt sty (lit, absC)
191 = uppAboves [ uppBesides [uppPStr SLIT("case "), pprBasicLit sty lit, uppChar ':'],
192 uppNest 2 (uppAbove (pprAbsC sty absC (c + switch_head_cost + costs absC))
193 (uppPStr SLIT("break;"))) ]
195 -- Costs for addressing header of switch and cond. branching -- HWL
196 switch_head_cost = addrModeCosts discrim Rhs + (Cost (0, 1, 0, 0, 0))
198 pprAbsC sty stmt@(COpStmt results op@(CCallOp _ _ _ _ _) args liveness_mask vol_regs) _
199 = pprCCall sty op args results liveness_mask vol_regs
201 pprAbsC sty stmt@(COpStmt results op args liveness_mask vol_regs) _
203 non_void_args = grab_non_void_amodes args
204 non_void_results = grab_non_void_amodes results
205 -- if just one result, we print in the obvious "assignment" style;
206 -- if 0 or many results, we emit a macro call, w/ the results
207 -- followed by the arguments. The macro presumably knows which
210 the_op = ppr_op_call non_void_results non_void_args
211 -- liveness mask is *in* the non_void_args
213 BIND (ppr_vol_regs sty vol_regs) _TO_ (pp_saves, pp_restores) ->
214 if primOpNeedsWrapper op then
215 uppAboves [ pp_saves,
223 ppr_op_call results args
224 = uppBesides [ prettyToUn (pprPrimOp sty op), uppLparen,
225 uppIntersperse uppComma (map ppr_op_result results),
226 if null results || null args then uppNil else uppComma,
227 uppIntersperse uppComma (map (pprAmode sty) args),
230 ppr_op_result r = ppr_amode sty r
231 -- primop macros do their own casting of result;
232 -- hence we can toss the provided cast...
234 pprAbsC sty (CSimultaneous abs_c) c
235 = uppBesides [uppStr "{{", pprAbsC sty abs_c c, uppStr "}}"]
237 pprAbsC sty stmt@(CMacroStmt macro as) _
238 = uppBesides [uppStr (show macro), uppLparen,
239 uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi] -- no casting
240 pprAbsC sty stmt@(CCallProfCtrMacro op as) _
241 = uppBesides [uppPStr op, uppLparen,
242 uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi]
243 pprAbsC sty stmt@(CCallProfCCMacro op as) _
244 = uppBesides [uppPStr op, uppLparen,
245 uppIntersperse uppComma (map (ppr_amode sty) as),pp_paren_semi]
247 pprAbsC sty (CCodeBlock label abs_C) _
248 = ASSERT( maybeToBool(nonemptyAbsC abs_C) )
249 BIND (pprTempAndExternDecls abs_C) _TO_ (pp_temps, pp_exts) ->
251 uppBesides [uppStr (if (externallyVisibleCLabel label)
252 then "FN_(" -- abbreviations to save on output
254 pprCLabel sty label, uppStr ") {"],
256 PprForC -> uppAbove pp_exts pp_temps
258 uppNest 8 (uppPStr SLIT("FB_")),
259 uppNest 8 (pprAbsC sty abs_C (costs abs_C)),
260 uppNest 8 (uppPStr SLIT("FE_")),
264 pprAbsC sty (CInitHdr cl_info reg_rel cost_centre inplace_upd) _
265 = uppBesides [ pp_init_hdr, uppStr "_HDR(",
266 ppr_amode sty (CAddr reg_rel), uppComma,
267 pprCLabel sty info_lbl, uppComma,
268 if_profiling sty (pprAmode sty cost_centre), uppComma,
269 pprHeapOffset sty size, uppComma, uppInt ptr_wds, pp_paren_semi ]
271 info_lbl = infoTableLabelFromCI cl_info
272 sm_rep = closureSMRep cl_info
273 size = closureSizeWithoutFixedHdr cl_info
274 ptr_wds = closurePtrsSize cl_info
276 pp_init_hdr = uppStr (if inplace_upd then
277 getSMUpdInplaceHdrStr sm_rep
279 getSMInitHdrStr sm_rep)
281 pprAbsC sty stmt@(CStaticClosure closure_lbl cl_info cost_centre amodes) _
282 = BIND (pprTempAndExternDecls stmt) _TO_ (_, pp_exts) ->
288 uppStr "SET_STATIC_HDR(",
289 pprCLabel sty closure_lbl, uppComma,
290 pprCLabel sty info_lbl, uppComma,
291 if_profiling sty (pprAmode sty cost_centre), uppComma,
292 ppLocalness closure_lbl, uppComma,
293 ppLocalnessMacro False{-for data-} info_lbl,
296 uppNest 2 (uppBesides (map (ppr_item sty) amodes)),
297 uppNest 2 (uppBesides (map (ppr_item sty) padding_wds)),
301 info_lbl = infoTableLabelFromCI cl_info
304 = if getAmodeRep item == VoidRep
305 then uppStr ", (W_) 0" -- might not even need this...
306 else uppBeside (uppStr ", (W_)") (ppr_amode sty item)
309 if not (closureUpdReqd cl_info) then
312 BIND (max 0 (mIN_UPD_SIZE - length amodes)) _TO_ still_needed ->
313 nOfThem still_needed (mkIntCLit 0) -- a bunch of 0s
317 STATIC_INIT_HDR(c,i,localness) blows into:
318 localness W_ c_closure [] = { i_info, extra_fixed_wd<1..n>
320 then *NO VarHdr STUFF FOR STATIC*...
322 then the amodes are dropped in...
328 pprAbsC sty stmt@(CClosureInfoAndCode cl_info slow maybe_fast upd cl_descr liveness) _
333 pprCLabel sty info_lbl, uppComma,
335 -- CONST_ITBL needs an extra label for
336 -- the static version of the object.
337 if isConstantRep sm_rep
338 then uppBeside (pprCLabel sty (closureLabelFromCI cl_info)) uppComma
341 pprCLabel sty slow_lbl, uppComma,
342 pprAmode sty upd, uppComma,
343 uppInt liveness, uppComma,
347 pp_ptr_wds, uppComma,
349 ppLocalness info_lbl, uppComma,
350 ppLocalnessMacro True{-function-} slow_lbl, uppComma,
353 then uppBeside (uppInt select_word_i) uppComma
356 if_profiling sty pp_kind, uppComma,
357 if_profiling sty pp_descr, uppComma,
358 if_profiling sty pp_type,
364 Just fast -> let stuff = CCodeBlock fast_lbl fast in
365 pprAbsC sty stuff (costs stuff)
368 info_lbl = infoTableLabelFromCI cl_info
369 fast_lbl = fastLabelFromCI cl_info
370 sm_rep = closureSMRep cl_info
373 = case (nonemptyAbsC slow) of
374 Nothing -> (mkErrorStdEntryLabel, uppNil)
375 Just xx -> (entryLabelFromCI cl_info,
376 let stuff = CCodeBlock slow_lbl xx in
377 pprAbsC sty stuff (costs stuff))
379 maybe_selector = maybeSelectorInfo cl_info
380 is_selector = maybeToBool maybe_selector
381 (Just (_, select_word_i)) = maybe_selector
383 pp_info_rep -- special stuff if it's a selector; otherwise, just the SMrep
384 = uppStr (if is_selector then "SELECT" else (getSMInfoStr sm_rep))
386 pp_tag = uppInt (closureSemiTag cl_info)
388 is_phantom = isPhantomRep sm_rep
390 pp_size = if isSpecRep sm_rep then -- exploiting: SPEC_VHS == 0 (always)
391 uppInt (closureNonHdrSize cl_info)
393 else if is_phantom then -- do not have sizes for these
396 pprHeapOffset sty (closureSizeWithoutFixedHdr cl_info)
398 pp_ptr_wds = if is_phantom then
401 uppInt (closurePtrsSize cl_info)
403 pp_kind = uppStr (closureKind cl_info)
404 pp_descr = uppBesides [uppChar '"', uppStr (stringToC cl_descr), uppChar '"']
405 pp_type = uppBesides [uppChar '"', uppStr (stringToC (closureTypeDescr cl_info)), uppChar '"']
407 pprAbsC sty (CRetVector lbl maybes deflt) c
408 = uppAboves [ uppStr "{ // CRetVector (lbl????)",
409 uppNest 8 (uppSep (map (ppr_maybe_amode sty) maybes)),
410 uppStr "} /*default=*/ {", pprAbsC sty deflt c,
413 ppr_maybe_amode sty Nothing = uppPStr SLIT("/*default*/")
414 ppr_maybe_amode sty (Just a) = pprAmode sty a
416 pprAbsC sty stmt@(CRetUnVector label amode) _
417 = uppBesides [uppStr "UNVECTBL(", pp_static, uppComma, pprCLabel sty label, uppComma,
418 pprAmode sty amode, uppRparen]
420 pp_static = if externallyVisibleCLabel label then uppNil else uppPStr SLIT("static")
422 pprAbsC sty stmt@(CFlatRetVector label amodes) _
423 = BIND (pprTempAndExternDecls stmt) _TO_ (_, pp_exts) ->
428 uppBesides [ppLocalness label, uppPStr SLIT(" W_ "),
429 pprCLabel sty label, uppStr "[] = {"],
430 uppNest 2 (uppInterleave uppComma (map (ppr_item sty) amodes)),
434 ppr_item sty item = uppBeside (uppStr "(W_) ") (ppr_amode sty item)
436 pprAbsC sty (CCostCentreDecl is_local cc) _ = uppCostCentreDecl sty is_local cc
441 = uppBeside static const
443 static = if (externallyVisibleCLabel label) then uppNil else uppPStr SLIT("static ")
444 const = if not (isReadOnly label) then uppNil else uppPStr SLIT("const")
446 ppLocalnessMacro for_fun{-vs data-} clabel
447 = BIND (if externallyVisibleCLabel clabel then "E" else "I") _TO_ prefix ->
448 BIND (if isReadOnly clabel then "RO_" else "") _TO_ suffix ->
450 then uppStr (prefix ++ "F_")
451 else uppStr (prefix ++ "D_" ++ suffix)
456 grab_non_void_amodes amodes
457 = filter non_void amodes
460 = case (getAmodeRep amode) of
466 ppr_vol_regs :: PprStyle -> [MagicId] -> (Unpretty, Unpretty)
468 ppr_vol_regs sty [] = (uppNil, uppNil)
469 ppr_vol_regs sty (VoidReg:rs) = ppr_vol_regs sty rs
470 ppr_vol_regs sty (r:rs)
471 = let pp_reg = case r of
472 VanillaReg pk n -> pprVanillaReg n
473 _ -> pprMagicId sty r
474 (more_saves, more_restores) = ppr_vol_regs sty rs
476 (uppAbove (uppBeside (uppPStr SLIT("CALLER_SAVE_")) pp_reg) more_saves,
477 uppAbove (uppBeside (uppPStr SLIT("CALLER_RESTORE_")) pp_reg) more_restores)
479 -- pp_basic_{saves,restores}: The BaseReg, SpA, SuA, SpB, SuB, Hp and
480 -- HpLim (see StgRegs.lh) may need to be saved/restored around CCalls,
481 -- depending on the platform. (The "volatile regs" stuff handles all
482 -- other registers.) Just be *sure* BaseReg is OK before trying to do
486 uppPStr SLIT("CALLER_SAVE_Base"),
487 uppPStr SLIT("CALLER_SAVE_SpA"),
488 uppPStr SLIT("CALLER_SAVE_SuA"),
489 uppPStr SLIT("CALLER_SAVE_SpB"),
490 uppPStr SLIT("CALLER_SAVE_SuB"),
491 uppPStr SLIT("CALLER_SAVE_Ret"),
492 -- uppPStr SLIT("CALLER_SAVE_Activity"),
493 uppPStr SLIT("CALLER_SAVE_Hp"),
494 uppPStr SLIT("CALLER_SAVE_HpLim") ]
498 uppPStr SLIT("CALLER_RESTORE_Base"), -- must be first!
499 uppPStr SLIT("CALLER_RESTORE_SpA"),
500 uppPStr SLIT("CALLER_RESTORE_SuA"),
501 uppPStr SLIT("CALLER_RESTORE_SpB"),
502 uppPStr SLIT("CALLER_RESTORE_SuB"),
503 uppPStr SLIT("CALLER_RESTORE_Ret"),
504 -- uppPStr SLIT("CALLER_RESTORE_Activity"),
505 uppPStr SLIT("CALLER_RESTORE_Hp"),
506 uppPStr SLIT("CALLER_RESTORE_HpLim"),
507 uppPStr SLIT("CALLER_RESTORE_StdUpdRetVec"),
508 uppPStr SLIT("CALLER_RESTORE_StkStub") ]
512 if_profiling sty pretty
514 PprForC -> if opt_SccProfilingOn
516 else uppChar '0' -- leave it out!
518 _ -> {-print it anyway-} pretty
520 -- ---------------------------------------------------------------------------
521 -- Changes for GrAnSim:
522 -- draw costs for computation in head of if into both branches;
523 -- as no abstractC data structure is given for the head, one is constructed
524 -- guessing unknown values and fed into the costs function
525 -- ---------------------------------------------------------------------------
527 do_if_stmt sty discrim tag alt_code deflt c
529 -- This special case happens when testing the result of a comparison.
530 -- We can just avoid some redundant clutter in the output.
531 MachInt n _ | n==0 -> ppr_if_stmt sty (pprAmode sty discrim)
533 (addrModeCosts discrim Rhs) c
535 cond = uppBesides [ pprAmode sty discrim,
536 uppPStr SLIT(" == "),
537 pprAmode sty (CLit tag) ]
541 (addrModeCosts discrim Rhs) c
543 ppr_if_stmt sty pp_pred then_part else_part discrim_costs c
545 uppBesides [uppStr "if (", pp_pred, uppStr ") {"],
546 uppNest 8 (pprAbsC sty then_part (c + discrim_costs +
547 (Cost (0, 2, 0, 0, 0)) +
549 (case nonemptyAbsC else_part of Nothing -> uppNil; Just _ -> uppStr "} else {"),
550 uppNest 8 (pprAbsC sty else_part (c + discrim_costs +
551 (Cost (0, 1, 0, 0, 0)) +
554 {- Total costs = inherited costs (before if) + costs for accessing discrim
555 + costs for cond branch ( = (0, 1, 0, 0, 0) )
556 + costs for that alternative
560 Historical note: this used to be two separate cases -- one for `ccall'
561 and one for `casm'. To get round a potential limitation to only 10
562 arguments, the numbering of arguments in @process_casm@ was beefed up a
565 Some rough notes on generating code for @CCallOp@:
567 1) Evaluate all arguments and stuff them into registers. (done elsewhere)
568 2) Save any essential registers (heap, stack, etc).
570 ToDo: If stable pointers are in use, these must be saved in a place
571 where the runtime system can get at them so that the Stg world can
572 be restarted during the call.
574 3) Save any temporary registers that are currently in use.
575 4) Do the call putting result into a local variable
576 5) Restore essential registers
577 6) Restore temporaries
579 (This happens after restoration of essential registers because we
580 might need the @Base@ register to access all the others correctly.)
582 7) If returning Malloc Pointer, build a closure containing the
585 Otherwise, copy local variable into result register.
587 8) If ccall (not casm), declare the function being called as extern so
588 that C knows if it returns anything other than an int.
591 { ResultType _ccall_result;
594 _ccall_result = f( args );
599 constructMallocPtr(liveness, return_reg, _ccall_result);
601 return_reg = _ccall_result;
606 Amendment to the above: if we can GC, we have to:
608 * make sure we save all our registers away where the garbage collector
610 * be sure that there are no live registers or we're in trouble.
611 (This can cause problems if you try something foolish like passing
612 an array or mallocptr to a _ccall_GC_ thing.)
613 * increment/decrement the @inCCallGC@ counter before/after the call so
614 that the runtime check that PerformGC is being used sensibly will work.
617 pprCCall sty op@(CCallOp op_str is_asm may_gc _ _) args results liveness_mask vol_regs
618 = if (may_gc && liveness_mask /= noLiveRegsMask)
619 then panic ("Live register in _casm_GC_ \"" ++ casm_str ++ "\" " ++ (uppShow 80 (uppCat pp_non_void_args)) ++ "\n")
623 declare_local_vars, -- local var for *result*
624 uppAboves local_arg_decls,
625 -- if is_asm then uppNil else declareExtern,
627 process_casm local_vars pp_non_void_args casm_str,
633 (pp_saves, pp_restores) = ppr_vol_regs sty vol_regs
634 (pp_save_context, pp_restore_context) =
636 then ( uppStr "extern StgInt inCCallGC; SaveAllStgRegs(); inCCallGC++;",
637 uppStr "inCCallGC--; RestoreAllStgRegs();")
638 else ( pp_basic_saves `uppAbove` pp_saves,
639 pp_basic_restores `uppAbove` pp_restores)
643 in ASSERT (all non_void nvas) nvas
644 -- the first argument will be the "I/O world" token (a VoidRep)
645 -- all others should be non-void
648 let nvrs = grab_non_void_amodes results
649 in ASSERT (length nvrs <= 1) nvrs
650 -- there will usually be two results: a (void) state which we
651 -- should ignore and a (possibly void) result.
653 (local_arg_decls, pp_non_void_args)
654 = unzip [ ppr_casm_arg sty a i | (a,i) <- non_void_args `zip` [1..] ]
656 pp_liveness = pprAmode sty (mkIntCLit liveness_mask)
658 (declare_local_vars, local_vars, assign_results)
659 = ppr_casm_results sty non_void_results pp_liveness
661 casm_str = if is_asm then _UNPK_ op_str else ccall_str
663 -- Remainder only used for ccall
665 ccall_str = uppShow 80
667 if null non_void_results
669 else uppPStr SLIT("%r = "),
670 uppLparen, uppPStr op_str, uppLparen,
671 uppIntersperse uppComma ccall_args,
674 num_args = length non_void_args
675 ccall_args = take num_args [ uppBeside (uppChar '%') (uppInt i) | i <- [0..] ]
678 If the argument is a heap object, we need to reach inside and pull out
679 the bit the C world wants to see. The only heap objects which can be
680 passed are @Array@s, @ByteArray@s and @MallocPtr@s.
683 ppr_casm_arg :: PprStyle -> CAddrMode -> Int -> (Unpretty, Unpretty)
684 -- (a) decl and assignment, (b) local var to be used later
686 ppr_casm_arg sty amode a_num
688 a_kind = getAmodeRep amode
689 pp_amode = pprAmode sty amode
690 pp_kind = pprPrimKind sty a_kind
692 local_var = uppBeside (uppPStr SLIT("_ccall_arg")) (uppInt a_num)
694 (arg_type, pp_amode2)
697 -- for array arguments, pass a pointer to the body of the array
698 -- (PTRS_ARR_CTS skips over all the header nonsense)
699 ArrayRep -> (pp_kind,
700 uppBesides [uppStr "PTRS_ARR_CTS(", pp_amode, uppRparen])
701 ByteArrayRep -> (pp_kind,
702 uppBesides [uppStr "BYTE_ARR_CTS(", pp_amode, uppRparen])
704 -- for Malloc Pointers, use MALLOC_PTR_DATA to fish out the contents.
705 MallocPtrRep -> (uppPStr SLIT("StgMallocPtr"),
706 uppBesides [uppStr "MallocPtr_CLOSURE_DATA(", pp_amode, uppStr")"])
707 other -> (pp_kind, pp_amode)
710 = uppBesides [ arg_type, uppSP, local_var, uppEquals, pp_amode2, uppSemi ]
712 (declare_local_var, local_var)
715 For l-values, the critical questions are:
717 1) Are there any results at all?
719 We only allow zero or one results.
721 2) Is the result is a mallocptr?
723 The mallocptr must be encapsulated immediately in a heap object.
728 -> [CAddrMode] -- list of results (length <= 1)
729 -> Unpretty -- liveness mask
731 ( Unpretty, -- declaration of any local vars
732 [Unpretty], -- list of result vars (same length as results)
733 Unpretty ) -- assignment (if any) of results in local var to registers
735 ppr_casm_results sty [] liveness
736 = (uppNil, [], uppNil) -- no results
738 ppr_casm_results sty [r] liveness
740 result_reg = ppr_amode sty r
741 r_kind = getAmodeRep r
743 local_var = uppPStr SLIT("_ccall_result")
745 (result_type, assign_result)
748 (uppPStr SLIT("StgMallocPtr"),
749 uppBesides [ uppStr "constructMallocPtr(",
751 result_reg, uppComma,
755 (pprPrimKind sty r_kind,
756 uppBesides [ result_reg, uppEquals, local_var, uppSemi ])
758 declare_local_var = uppBesides [ result_type, uppSP, local_var, uppSemi ]
760 (declare_local_var, [local_var], assign_result)
762 ppr_casm_results sty rs liveness
763 = panic "ppr_casm_results: ccall/casm with many results"
767 Note the sneaky way _the_ result is represented by a list so that we
768 can complain if it's used twice.
770 ToDo: Any chance of giving line numbers when process-casm fails?
771 Or maybe we should do a check _much earlier_ in compiler. ADR
775 [Unpretty] -- results (length <= 1)
776 -> [Unpretty] -- arguments
777 -> String -- format string (with embedded %'s)
779 Unpretty -- code being generated
781 process_casm results args string = process results args string
783 process [] _ "" = uppNil
784 process (_:_) _ "" = error ("process_casm: non-void result not assigned while processing _casm_ \"" ++ string ++ "\"\n(Try changing result type to PrimIO ()\n")
786 process ress args ('%':cs)
789 error ("process_casm: lonely % while processing _casm_ \"" ++ string ++ "\".\n")
792 uppBeside (uppChar '%') (process ress args css)
796 [] -> error ("process_casm: no result to match %r while processing _casm_ \"" ++ string ++ "\".\nTry deleting %r or changing result type from PrimIO ()\n")
797 [r] -> uppBeside r (process [] args css)
798 _ -> panic ("process_casm: casm with many results while processing _casm_ \"" ++ string ++ "\".\n")
801 case readDec other of
803 if 0 <= num && num < length args
804 then uppBeside (uppParens (args !! num))
805 (process ress args css)
806 else error ("process_casm: no such arg #:"++(show num)++" while processing \"" ++ string ++ "\".\n")
807 _ -> error ("process_casm: not %<num> while processing _casm_ \"" ++ string ++ "\".\n")
809 process ress args (other_c:cs)
810 = uppBeside (uppChar other_c) (process ress args cs)
813 %************************************************************************
815 \subsection[a2r-assignments]{Assignments}
817 %************************************************************************
819 Printing assignments is a little tricky because of type coercion.
821 First of all, the kind of the thing being assigned can be gotten from
822 the destination addressing mode. (It should be the same as the kind
823 of the source addressing mode.) If the kind of the assignment is of
824 @VoidRep@, then don't generate any code at all.
827 pprAssign :: PprStyle -> PrimRep -> CAddrMode -> CAddrMode -> Unpretty
829 pprAssign sty VoidRep dest src = uppNil
832 pprAssign sty kind dest src
833 | (kind /= getAmodeRep dest) || (kind /= getAmodeRep src)
834 = uppCat [uppStr "Bad kind:", pprPrimKind sty kind,
835 pprPrimKind sty (getAmodeRep dest), pprAmode sty dest,
836 pprPrimKind sty (getAmodeRep src), pprAmode sty src]
840 Special treatment for floats and doubles, to avoid unwanted conversions.
843 pprAssign sty FloatRep dest@(CVal reg_rel _) src
844 = uppBesides [ uppStr "ASSIGN_FLT(", ppr_amode sty (CAddr reg_rel), uppComma, pprAmode sty src, pp_paren_semi ]
846 pprAssign sty DoubleRep dest@(CVal reg_rel _) src
847 = uppBesides [ uppStr "ASSIGN_DBL(", ppr_amode sty (CAddr reg_rel), uppComma, pprAmode sty src, pp_paren_semi ]
850 Lastly, the question is: will the C compiler think the types of the
851 two sides of the assignment match?
853 We assume that the types will match
854 if neither side is a @CVal@ addressing mode for any register
855 which can point into the heap or B stack.
857 Why? Because the heap and B stack are used to store miscellaneous things,
858 whereas the A stack, temporaries, registers, etc., are only used for things
862 pprAssign sty kind (CReg (VanillaReg _ dest)) (CReg (VanillaReg _ src))
863 = uppBesides [ pprVanillaReg dest, uppEquals,
864 pprVanillaReg src, uppSemi ]
866 pprAssign sty kind dest src
868 -- Add in a cast to StgWord (a.k.a. W_) iff the destination is mixed
869 = uppBesides [ ppr_amode sty dest, uppEquals,
870 uppStr "(W_)(", -- Here is the cast
871 ppr_amode sty src, pp_paren_semi ]
873 pprAssign sty kind dest src
874 | mixedPtrLocn dest && getAmodeRep src /= PtrRep
875 -- Add in a cast to StgPtr (a.k.a. P_) iff the destination is mixed
876 = uppBesides [ ppr_amode sty dest, uppEquals,
877 uppStr "(P_)(", -- Here is the cast
878 ppr_amode sty src, pp_paren_semi ]
880 pprAssign sty ByteArrayRep dest src
882 -- Add in a cast to StgPtr (a.k.a. B_) iff the source is mixed
883 = uppBesides [ ppr_amode sty dest, uppEquals,
884 uppStr "(B_)(", -- Here is the cast
885 ppr_amode sty src, pp_paren_semi ]
887 pprAssign sty kind other_dest src
888 = uppBesides [ ppr_amode sty other_dest, uppEquals,
889 pprAmode sty src, uppSemi ]
893 %************************************************************************
895 \subsection[a2r-CAddrModes]{Addressing modes}
897 %************************************************************************
899 @pprAmode@ is used to print r-values (which may need casts), whereas
900 @ppr_amode@ is used for l-values {\em and} as a help function for
904 pprAmode, ppr_amode :: PprStyle -> CAddrMode -> Unpretty
907 For reasons discussed above under assignments, @CVal@ modes need
908 to be treated carefully. First come special cases for floats and doubles,
909 similar to those in @pprAssign@:
911 (NB: @PK_FLT@ and @PK_DBL@ require the {\em address} of the value in
915 pprAmode sty (CVal reg_rel FloatRep)
916 = uppBesides [ uppStr "PK_FLT(", ppr_amode sty (CAddr reg_rel), uppRparen ]
917 pprAmode sty (CVal reg_rel DoubleRep)
918 = uppBesides [ uppStr "PK_DBL(", ppr_amode sty (CAddr reg_rel), uppRparen ]
921 Next comes the case where there is some other cast need, and the
926 | mixedTypeLocn amode
927 = uppParens (uppBesides [ pprPrimKind sty (getAmodeRep amode), uppStr ")(",
928 ppr_amode sty amode ])
929 | otherwise -- No cast needed
930 = ppr_amode sty amode
933 Now the rest of the cases for ``workhorse'' @ppr_amode@:
936 ppr_amode sty (CVal reg_rel _)
937 = case (pprRegRelative sty False{-no sign wanted-} reg_rel) of
938 (pp_reg, Nothing) -> uppBeside (uppChar '*') pp_reg
939 (pp_reg, Just offset) -> uppBesides [ pp_reg, uppBracket offset ]
941 ppr_amode sty (CAddr reg_rel)
942 = case (pprRegRelative sty True{-sign wanted-} reg_rel) of
943 (pp_reg, Nothing) -> pp_reg
944 (pp_reg, Just offset) -> uppBeside pp_reg offset
946 ppr_amode sty (CReg magic_id) = pprMagicId sty magic_id
948 ppr_amode sty (CTemp uniq kind) = prettyToUn (pprUnique uniq)
950 ppr_amode sty (CLbl label kind) = pprCLabel sty label
952 ppr_amode sty (CUnVecLbl direct vectored)
953 = uppBesides [uppStr "(StgRetAddr) UNVEC(", pprCLabel sty direct, uppComma,
954 pprCLabel sty vectored, uppRparen]
956 ppr_amode sty (CCharLike char)
957 = uppBesides [uppStr "CHARLIKE_CLOSURE(", pprAmode sty char, uppRparen ]
958 ppr_amode sty (CIntLike int)
959 = uppBesides [uppStr "INTLIKE_CLOSURE(", pprAmode sty int, uppRparen ]
961 ppr_amode sty (CString str) = uppBesides [uppChar '"', uppStr (stringToC (_UNPK_ str)), uppChar '"']
962 -- ToDo: are these *used* for anything?
964 ppr_amode sty (CLit lit) = pprBasicLit sty lit
966 ppr_amode sty (CLitLit str _) = uppPStr str
968 ppr_amode sty (COffset off) = pprHeapOffset sty off
970 ppr_amode sty (CCode abs_C)
971 = uppAboves [ uppStr "{ -- CCode", uppNest 8 (pprAbsC sty abs_C (costs abs_C)), uppChar '}' ]
973 ppr_amode sty (CLabelledCode label abs_C)
974 = uppAboves [ uppBesides [pprCLabel sty label, uppStr " = { -- CLabelledCode"],
975 uppNest 8 (pprAbsC sty abs_C (costs abs_C)), uppChar '}' ]
977 ppr_amode sty (CJoinPoint _ _)
978 = panic "ppr_amode: CJoinPoint"
980 ppr_amode sty (CTableEntry base index kind)
981 = uppBesides [uppStr "((", pprPrimKind sty kind, uppStr " *)(",
982 ppr_amode sty base, uppStr "))[(I_)(", ppr_amode sty index,
985 ppr_amode sty (CMacroExpr pk macro as)
986 = uppBesides [uppLparen, pprPrimKind sty pk, uppStr ")(", uppStr (show macro), uppLparen,
987 uppIntersperse uppComma (map (pprAmode sty) as), uppStr "))"]
989 ppr_amode sty (CCostCentre cc print_as_string)
990 = uppCostCentre sty print_as_string cc
993 %************************************************************************
995 \subsection[a2r-MagicIds]{Magic ids}
997 %************************************************************************
999 @pprRegRelative@ returns a pair of the @Unpretty@ for the register
1000 (some casting may be required), and a @Maybe Unpretty@ for the offset
1001 (zero offset gives a @Nothing@).
1004 addPlusSign :: Bool -> Unpretty -> Unpretty
1005 addPlusSign False p = p
1006 addPlusSign True p = uppBeside (uppChar '+') p
1008 pprSignedInt :: Bool -> Int -> Maybe Unpretty -- Nothing => 0
1009 pprSignedInt sign_wanted n
1010 = if n == 0 then Nothing else
1011 if n > 0 then Just (addPlusSign sign_wanted (uppInt n))
1012 else Just (uppInt n)
1014 pprRegRelative :: PprStyle
1015 -> Bool -- True <=> Print leading plus sign (if +ve)
1017 -> (Unpretty, Maybe Unpretty)
1019 pprRegRelative sty sign_wanted (SpARel spA off)
1020 = (pprMagicId sty SpA, pprSignedInt sign_wanted (spARelToInt spA off))
1022 pprRegRelative sty sign_wanted (SpBRel spB off)
1023 = (pprMagicId sty SpB, pprSignedInt sign_wanted (spBRelToInt spB off))
1025 pprRegRelative sty sign_wanted r@(HpRel hp off)
1026 = let to_print = hp `subOff` off
1027 pp_Hp = pprMagicId sty Hp
1029 if isZeroOff to_print then
1032 (pp_Hp, Just (uppBeside (uppChar '-') (pprHeapOffset sty to_print)))
1033 -- No parens needed because pprHeapOffset
1034 -- does them when necessary
1036 pprRegRelative sty sign_wanted (NodeRel off)
1037 = let pp_Node = pprMagicId sty node
1039 if isZeroOff off then
1042 (pp_Node, Just (addPlusSign sign_wanted (pprHeapOffset sty off)))
1046 @pprMagicId@ just prints the register name. @VanillaReg@ registers are
1047 represented by a discriminated union (@StgUnion@), so we use the @PrimRep@
1048 to select the union tag.
1051 pprMagicId :: PprStyle -> MagicId -> Unpretty
1053 pprMagicId sty BaseReg = uppPStr SLIT("BaseReg")
1054 pprMagicId sty StkOReg = uppPStr SLIT("StkOReg")
1055 pprMagicId sty (VanillaReg pk n)
1056 = uppBesides [ pprVanillaReg n, uppChar '.',
1058 pprMagicId sty (FloatReg n) = uppBeside (uppPStr SLIT("FltReg")) (uppInt IBOX(n))
1059 pprMagicId sty (DoubleReg n) = uppBeside (uppPStr SLIT("DblReg")) (uppInt IBOX(n))
1060 pprMagicId sty TagReg = uppPStr SLIT("TagReg")
1061 pprMagicId sty RetReg = uppPStr SLIT("RetReg")
1062 pprMagicId sty SpA = uppPStr SLIT("SpA")
1063 pprMagicId sty SuA = uppPStr SLIT("SuA")
1064 pprMagicId sty SpB = uppPStr SLIT("SpB")
1065 pprMagicId sty SuB = uppPStr SLIT("SuB")
1066 pprMagicId sty Hp = uppPStr SLIT("Hp")
1067 pprMagicId sty HpLim = uppPStr SLIT("HpLim")
1068 pprMagicId sty LivenessReg = uppPStr SLIT("LivenessReg")
1069 pprMagicId sty StdUpdRetVecReg = uppPStr SLIT("StdUpdRetVecReg")
1070 pprMagicId sty StkStubReg = uppPStr SLIT("StkStubReg")
1071 pprMagicId sty CurCostCentre = uppPStr SLIT("CCC")
1072 pprMagicId sty VoidReg = panic "pprMagicId:VoidReg!"
1074 pprVanillaReg :: FAST_INT -> Unpretty
1076 pprVanillaReg n = uppBeside (uppChar 'R') (uppInt IBOX(n))
1078 pprUnionTag :: PrimRep -> Unpretty
1080 pprUnionTag PtrRep = uppChar 'p'
1081 pprUnionTag CodePtrRep = uppPStr SLIT("fp")
1082 pprUnionTag DataPtrRep = uppChar 'd'
1083 pprUnionTag RetRep = uppChar 'r'
1084 pprUnionTag CostCentreRep = panic "pprUnionTag:CostCentre?"
1086 pprUnionTag CharRep = uppChar 'c'
1087 pprUnionTag IntRep = uppChar 'i'
1088 pprUnionTag WordRep = uppChar 'w'
1089 pprUnionTag AddrRep = uppChar 'v'
1090 pprUnionTag FloatRep = uppChar 'f'
1091 pprUnionTag DoubleRep = panic "pprUnionTag:Double?"
1093 pprUnionTag StablePtrRep = uppChar 'i'
1094 pprUnionTag MallocPtrRep = uppChar 'p'
1096 pprUnionTag ArrayRep = uppChar 'p'
1097 pprUnionTag ByteArrayRep = uppChar 'b'
1099 pprUnionTag _ = panic "pprUnionTag:Odd kind"
1103 Find and print local and external declarations for a list of
1104 Abstract~C statements.
1106 pprTempAndExternDecls :: AbstractC -> (Unpretty{-temps-}, Unpretty{-externs-})
1107 pprTempAndExternDecls AbsCNop = (uppNil, uppNil)
1109 pprTempAndExternDecls (AbsCStmts stmt1 stmt2)
1110 = initTE (ppr_decls_AbsC stmt1 `thenTE` \ (t_p1, e_p1) ->
1111 ppr_decls_AbsC stmt2 `thenTE` \ (t_p2, e_p2) ->
1112 BIND (catMaybes [t_p1, t_p2]) _TO_ real_temps ->
1113 BIND (catMaybes [e_p1, e_p2]) _TO_ real_exts ->
1114 returnTE (uppAboves real_temps, uppAboves real_exts)
1118 pprTempAndExternDecls other_stmt
1119 = initTE (ppr_decls_AbsC other_stmt `thenTE` \ (maybe_t, maybe_e) ->
1130 pprBasicLit :: PprStyle -> Literal -> Unpretty
1131 pprPrimKind :: PprStyle -> PrimRep -> Unpretty
1133 pprBasicLit sty lit = uppStr (showLiteral sty lit)
1134 pprPrimKind sty k = uppStr (showPrimRep k)
1138 %************************************************************************
1140 \subsection[a2r-monad]{Monadery}
1142 %************************************************************************
1144 We need some monadery to keep track of temps and externs we have already
1145 printed. This info must be threaded right through the Abstract~C, so
1146 it's most convenient to hide it in this monad.
1148 WDP 95/02: Switched from \tr{([Unique], [CLabel])} to
1149 \tr{(UniqSet, CLabelSet)}. Allegedly for efficiency.
1152 type CLabelSet = FiniteMap CLabel (){-any type will do-}
1153 emptyCLabelSet = emptyFM
1154 x `elementOfCLabelSet` labs
1155 = case (lookupFM labs x) of { Just _ -> True; Nothing -> False }
1156 addToCLabelSet set x = addToFM set x ()
1158 type TEenv = (UniqSet Unique, CLabelSet)
1160 type TeM result = TEenv -> (TEenv, result)
1162 initTE :: TeM a -> a
1164 = case sa (emptyUniqSet, emptyCLabelSet) of { (_, result) ->
1167 {-# INLINE thenTE #-}
1168 {-# INLINE returnTE #-}
1170 thenTE :: TeM a -> (a -> TeM b) -> TeM b
1172 = case a u of { (u_1, result_of_a) ->
1175 mapTE :: (a -> TeM b) -> [a] -> TeM [b]
1176 mapTE f [] = returnTE []
1178 = f x `thenTE` \ r ->
1179 mapTE f xs `thenTE` \ rs ->
1182 returnTE :: a -> TeM a
1183 returnTE result env = (env, result)
1185 -- these next two check whether the thing is already
1186 -- recorded, and THEN THEY RECORD IT
1187 -- (subsequent calls will return False for the same uniq/label)
1189 tempSeenTE :: Unique -> TeM Bool
1190 tempSeenTE uniq env@(seen_uniqs, seen_labels)
1191 = if (uniq `elementOfUniqSet` seen_uniqs)
1193 else ((addOneToUniqSet seen_uniqs uniq,
1197 labelSeenTE :: CLabel -> TeM Bool
1198 labelSeenTE label env@(seen_uniqs, seen_labels)
1199 = if (label `elementOfCLabelSet` seen_labels)
1202 addToCLabelSet seen_labels label),
1207 pprTempDecl :: Unique -> PrimRep -> Unpretty
1208 pprTempDecl uniq kind
1209 = uppBesides [ pprPrimKind PprDebug kind, uppSP, prettyToUn (pprUnique uniq), uppSemi ]
1211 pprExternDecl :: CLabel -> PrimRep -> Unpretty
1213 pprExternDecl clabel kind
1214 = if not (needsCDecl clabel) then
1215 uppNil -- do not print anything for "known external" things (e.g., < PreludeCore)
1219 CodePtrRep -> ppLocalnessMacro True{-function-} clabel
1220 _ -> ppLocalnessMacro False{-data-} clabel
1221 ) _TO_ pp_macro_str ->
1223 uppBesides [ pp_macro_str, uppLparen, pprCLabel PprForC clabel, pp_paren_semi ]
1228 ppr_decls_AbsC :: AbstractC -> TeM (Maybe Unpretty{-temps-}, Maybe Unpretty{-externs-})
1230 ppr_decls_AbsC AbsCNop = returnTE (Nothing, Nothing)
1232 ppr_decls_AbsC (AbsCStmts stmts_1 stmts_2)
1233 = ppr_decls_AbsC stmts_1 `thenTE` \ p1 ->
1234 ppr_decls_AbsC stmts_2 `thenTE` \ p2 ->
1235 returnTE (maybe_uppAboves [p1, p2])
1237 ppr_decls_AbsC (CClosureUpdInfo info)
1238 = ppr_decls_AbsC info
1240 ppr_decls_AbsC (CSplitMarker) = returnTE (Nothing, Nothing)
1242 ppr_decls_AbsC (CAssign dest source)
1243 = ppr_decls_Amode dest `thenTE` \ p1 ->
1244 ppr_decls_Amode source `thenTE` \ p2 ->
1245 returnTE (maybe_uppAboves [p1, p2])
1247 ppr_decls_AbsC (CJump target) = ppr_decls_Amode target
1249 ppr_decls_AbsC (CFallThrough target) = ppr_decls_Amode target
1251 ppr_decls_AbsC (CReturn target _) = ppr_decls_Amode target
1253 ppr_decls_AbsC (CSwitch discrim alts deflt)
1254 = ppr_decls_Amode discrim `thenTE` \ pdisc ->
1255 mapTE ppr_alt_stuff alts `thenTE` \ palts ->
1256 ppr_decls_AbsC deflt `thenTE` \ pdeflt ->
1257 returnTE (maybe_uppAboves (pdisc:pdeflt:palts))
1259 ppr_alt_stuff (_, absC) = ppr_decls_AbsC absC
1261 ppr_decls_AbsC (CCodeBlock label absC)
1262 = ppr_decls_AbsC absC
1264 ppr_decls_AbsC (CInitHdr cl_info reg_rel cost_centre inplace_upd)
1265 -- ToDo: strictly speaking, should chk "cost_centre" amode
1266 = labelSeenTE info_lbl `thenTE` \ label_seen ->
1271 Just (pprExternDecl info_lbl PtrRep))
1273 info_lbl = infoTableLabelFromCI cl_info
1275 ppr_decls_AbsC (COpStmt results _ args _ _) = ppr_decls_Amodes (results ++ args)
1276 ppr_decls_AbsC (CSimultaneous abc) = ppr_decls_AbsC abc
1278 ppr_decls_AbsC (CMacroStmt _ amodes) = ppr_decls_Amodes amodes
1280 ppr_decls_AbsC (CCallProfCtrMacro _ amodes) = ppr_decls_Amodes [] -- *****!!!
1281 -- you get some nasty re-decls of stdio.h if you compile
1282 -- the prelude while looking inside those amodes;
1283 -- no real reason to, anyway.
1284 ppr_decls_AbsC (CCallProfCCMacro _ amodes) = ppr_decls_Amodes amodes
1286 ppr_decls_AbsC (CStaticClosure closure_lbl closure_info cost_centre amodes)
1287 -- ToDo: strictly speaking, should chk "cost_centre" amode
1288 = ppr_decls_Amodes amodes
1290 ppr_decls_AbsC (CClosureInfoAndCode cl_info slow maybe_fast upd_lbl _ _)
1291 = ppr_decls_Amodes [entry_lbl, upd_lbl] `thenTE` \ p1 ->
1292 ppr_decls_AbsC slow `thenTE` \ p2 ->
1294 Nothing -> returnTE (Nothing, Nothing)
1295 Just fast -> ppr_decls_AbsC fast) `thenTE` \ p3 ->
1296 returnTE (maybe_uppAboves [p1, p2, p3])
1298 entry_lbl = CLbl slow_lbl CodePtrRep
1299 slow_lbl = case (nonemptyAbsC slow) of
1300 Nothing -> mkErrorStdEntryLabel
1301 Just _ -> entryLabelFromCI cl_info
1303 ppr_decls_AbsC (CRetVector label maybe_amodes absC)
1304 = ppr_decls_Amodes (catMaybes maybe_amodes) `thenTE` \ p1 ->
1305 ppr_decls_AbsC absC `thenTE` \ p2 ->
1306 returnTE (maybe_uppAboves [p1, p2])
1308 ppr_decls_AbsC (CRetUnVector _ amode) = ppr_decls_Amode amode
1309 ppr_decls_AbsC (CFlatRetVector _ amodes) = ppr_decls_Amodes amodes
1313 ppr_decls_Amode :: CAddrMode -> TeM (Maybe Unpretty, Maybe Unpretty)
1314 ppr_decls_Amode (CVal _ _) = returnTE (Nothing, Nothing)
1315 ppr_decls_Amode (CAddr _) = returnTE (Nothing, Nothing)
1316 ppr_decls_Amode (CReg _) = returnTE (Nothing, Nothing)
1317 ppr_decls_Amode (CString _) = returnTE (Nothing, Nothing)
1318 ppr_decls_Amode (CLit _) = returnTE (Nothing, Nothing)
1319 ppr_decls_Amode (CLitLit _ _) = returnTE (Nothing, Nothing)
1320 ppr_decls_Amode (COffset _) = returnTE (Nothing, Nothing)
1322 -- CIntLike must be a literal -- no decls
1323 ppr_decls_Amode (CIntLike int) = returnTE (Nothing, Nothing)
1325 -- CCharLike may have be arbitrary value -- may have decls
1326 ppr_decls_Amode (CCharLike char)
1327 = ppr_decls_Amode char
1329 -- now, the only place where we actually print temps/externs...
1330 ppr_decls_Amode (CTemp uniq kind)
1332 VoidRep -> returnTE (Nothing, Nothing)
1334 tempSeenTE uniq `thenTE` \ temp_seen ->
1336 (if temp_seen then Nothing else Just (pprTempDecl uniq kind), Nothing)
1338 ppr_decls_Amode (CLbl label VoidRep)
1339 = returnTE (Nothing, Nothing)
1341 ppr_decls_Amode (CLbl label kind)
1342 = labelSeenTE label `thenTE` \ label_seen ->
1344 if label_seen then Nothing else Just (pprExternDecl label kind))
1347 ppr_decls_Amode (CUnVecLbl direct vectored)
1348 = labelSeenTE direct `thenTE` \ dlbl_seen ->
1349 labelSeenTE vectored `thenTE` \ vlbl_seen ->
1351 ddcl = if dlbl_seen then uppNil else pprExternDecl direct CodePtrRep
1352 vdcl = if vlbl_seen then uppNil else pprExternDecl vectored DataPtrRep
1355 if (dlbl_seen || not (needsCDecl direct)) &&
1356 (vlbl_seen || not (needsCDecl vectored)) then Nothing
1357 else Just (uppBesides [uppStr "UNVEC(", ddcl, uppComma, vdcl, uppRparen]))
1360 ppr_decls_Amode (CUnVecLbl direct vectored)
1361 = -- We don't mark either label as "seen", because
1362 -- we don't know which one will be used and which one tossed
1363 -- by the C macro...
1364 --labelSeenTE direct `thenTE` \ dlbl_seen ->
1365 --labelSeenTE vectored `thenTE` \ vlbl_seen ->
1367 ddcl = {-if dlbl_seen then uppNil else-} pprExternDecl direct CodePtrRep
1368 vdcl = {-if vlbl_seen then uppNil else-} pprExternDecl vectored DataPtrRep
1371 if ({-dlbl_seen ||-} not (needsCDecl direct)) &&
1372 ({-vlbl_seen ||-} not (needsCDecl vectored)) then Nothing
1373 else Just (uppBesides [uppStr "UNVEC(", ddcl, uppComma, vdcl, uppRparen]))
1375 ppr_decls_Amode (CTableEntry base index _)
1376 = ppr_decls_Amode base `thenTE` \ p1 ->
1377 ppr_decls_Amode index `thenTE` \ p2 ->
1378 returnTE (maybe_uppAboves [p1, p2])
1380 ppr_decls_Amode (CMacroExpr _ _ amodes)
1381 = ppr_decls_Amodes amodes
1383 ppr_decls_Amode other = returnTE (Nothing, Nothing)
1386 maybe_uppAboves :: [(Maybe Unpretty, Maybe Unpretty)] -> (Maybe Unpretty, Maybe Unpretty)
1388 = BIND (unzip ps) _TO_ (ts, es) ->
1389 BIND (catMaybes ts) _TO_ real_ts ->
1390 BIND (catMaybes es) _TO_ real_es ->
1391 (if (null real_ts) then Nothing else Just (uppAboves real_ts),
1392 if (null real_es) then Nothing else Just (uppAboves real_es))
1397 ppr_decls_Amodes :: [CAddrMode] -> TeM (Maybe Unpretty, Maybe Unpretty)
1398 ppr_decls_Amodes amodes
1399 = mapTE ppr_decls_Amode amodes `thenTE` \ ps ->
1400 returnTE ( maybe_uppAboves ps )