2 % (c) The University of Glasgow 2006
3 % (c) The AQUA Project, Glasgow University, 1994-1998
6 ``Finite maps'' are the heart of the compiler's
7 lookup-tables/environments and its implementation of sets. Important
10 This code is derived from that in the paper:
13 "Efficient sets: a balancing act"
14 Journal of functional programming 3(4) Oct 1993, pp553-562
17 The code is SPECIALIZEd to various highly-desirable types (e.g., Id)
23 FiniteMap, -- abstract type
25 emptyFM, unitFM, listToFM,
43 sizeFM, isEmptyFM, elemFM, lookupFM, lookupWithDefaultFM,
45 fmToList, keysFM, eltsFM
51 #include "HsVersions.h"
53 #if defined(DEBUG_FINITEMAPS)/* NB NB NB */
54 #define OUTPUTABLE_key , Outputable key
56 #define OUTPUTABLE_key {--}
60 import Bag ( Bag, foldrBag )
66 -- was this import only needed for I#, or does it have something
67 -- to do with the (not-presently-used) IF_NCG also?
73 #if ! OMIT_NATIVE_CODEGEN
76 # define IF_NCG(a) {--}
82 %************************************************************************
84 \subsection{The signature of the module}
86 %************************************************************************
90 emptyFM :: FiniteMap key elt
91 unitFM :: key -> elt -> FiniteMap key elt
92 listToFM :: (Ord key OUTPUTABLE_key) => [(key,elt)] -> FiniteMap key elt
93 -- In the case of duplicates, the last is taken
94 bagToFM :: (Ord key OUTPUTABLE_key) => Bag (key,elt) -> FiniteMap key elt
95 -- In the case of duplicates, who knows which is taken
97 -- ADDING AND DELETING
98 -- Throws away any previous binding
99 -- In the list case, the items are added starting with the
100 -- first one in the list
101 addToFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> key -> elt -> FiniteMap key elt
102 addListToFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> [(key,elt)] -> FiniteMap key elt
104 -- Combines with previous binding
105 -- The combining fn goes (old -> new -> new)
106 addToFM_C :: (Ord key OUTPUTABLE_key) => (elt -> elt -> elt)
107 -> FiniteMap key elt -> key -> elt
109 addListToFM_C :: (Ord key OUTPUTABLE_key) => (elt -> elt -> elt)
110 -> FiniteMap key elt -> [(key,elt)]
113 -- Deletion doesn't complain if you try to delete something
115 delFromFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> key -> FiniteMap key elt
116 delListFromFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> [key] -> FiniteMap key elt
119 -- Bindings in right argument shadow those in the left
120 plusFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt
123 -- Combines bindings for the same thing with the given function
124 plusFM_C :: (Ord key OUTPUTABLE_key) => (elt -> elt -> elt)
125 -> FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
127 minusFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
128 -- (minusFM a1 a2) deletes from a1 any bindings which are bound in a2
130 intersectFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt -> FiniteMap key elt
131 intersectFM_C :: (Ord key OUTPUTABLE_key) => (elt1 -> elt2 -> elt3)
132 -> FiniteMap key elt1 -> FiniteMap key elt2 -> FiniteMap key elt3
134 -- MAPPING, FOLDING, FILTERING
135 foldFM :: (key -> elt -> a -> a) -> a -> FiniteMap key elt -> a
136 mapFM :: (key -> elt1 -> elt2) -> FiniteMap key elt1 -> FiniteMap key elt2
137 filterFM :: (Ord key OUTPUTABLE_key) => (key -> elt -> Bool)
138 -> FiniteMap key elt -> FiniteMap key elt
142 sizeFM :: FiniteMap key elt -> Int
143 isEmptyFM :: FiniteMap key elt -> Bool
145 elemFM :: (Ord key OUTPUTABLE_key) => key -> FiniteMap key elt -> Bool
146 lookupFM :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> key -> Maybe elt
148 :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> elt -> key -> elt
149 -- lookupWithDefaultFM supplies a "default" elt
150 -- to return for an unmapped key
153 fmToList :: FiniteMap key elt -> [(key,elt)]
154 keysFM :: FiniteMap key elt -> [key]
155 eltsFM :: FiniteMap key elt -> [elt]
158 %************************************************************************
160 \subsection{The @FiniteMap@ data type, and building of same}
162 %************************************************************************
164 Invariants about @FiniteMap@:
167 all keys in a FiniteMap are distinct
169 all keys in left subtree are $<$ key in Branch and
170 all keys in right subtree are $>$ key in Branch
172 size field of a Branch gives number of Branch nodes in the tree
174 size of left subtree is differs from size of right subtree by a
175 factor of at most \tr{sIZE_RATIO}
179 data FiniteMap key elt
181 | Branch key elt -- Key and elt stored here
182 {-# UNPACK #-} !Int -- Size >= 1
183 (FiniteMap key elt) -- Children
191 = Branch bottom bottom 0 bottom bottom
193 bottom = panic "emptyFM"
196 -- #define EmptyFM (Branch _ _ 0 _ _)
198 unitFM key elt = Branch key elt 1 emptyFM emptyFM
200 listToFM = addListToFM emptyFM
202 bagToFM = foldrBag (\(k,v) fm -> addToFM fm k v) emptyFM
205 %************************************************************************
207 \subsection{Adding to and deleting from @FiniteMaps@}
209 %************************************************************************
212 addToFM fm key elt = addToFM_C (\ old new -> new) fm key elt
214 addToFM_C combiner EmptyFM key elt = unitFM key elt
215 addToFM_C combiner (Branch key elt size fm_l fm_r) new_key new_elt
216 = case compare new_key key of
217 LT -> mkBalBranch key elt (addToFM_C combiner fm_l new_key new_elt) fm_r
218 GT -> mkBalBranch key elt fm_l (addToFM_C combiner fm_r new_key new_elt)
219 EQ -> Branch new_key (combiner elt new_elt) size fm_l fm_r
221 addListToFM fm key_elt_pairs = addListToFM_C (\ old new -> new) fm key_elt_pairs
223 addListToFM_C combiner fm key_elt_pairs
224 = foldl' add fm key_elt_pairs -- foldl adds from the left
226 add fmap (key,elt) = addToFM_C combiner fmap key elt
230 delFromFM EmptyFM del_key = emptyFM
231 delFromFM (Branch key elt size fm_l fm_r) del_key
232 = case compare del_key key of
233 GT -> mkBalBranch key elt fm_l (delFromFM fm_r del_key)
234 LT -> mkBalBranch key elt (delFromFM fm_l del_key) fm_r
235 EQ -> glueBal fm_l fm_r
237 delListFromFM fm keys = foldl' delFromFM fm keys
240 %************************************************************************
242 \subsection{Combining @FiniteMaps@}
244 %************************************************************************
247 plusFM_C combiner EmptyFM fm2 = fm2
248 plusFM_C combiner fm1 EmptyFM = fm1
249 plusFM_C combiner fm1 (Branch split_key elt2 _ left right)
250 = mkVBalBranch split_key new_elt
251 (plusFM_C combiner lts left)
252 (plusFM_C combiner gts right)
254 lts = splitLT fm1 split_key
255 gts = splitGT fm1 split_key
256 new_elt = case lookupFM fm1 split_key of
258 Just elt1 -> combiner elt1 elt2
260 -- It's worth doing plusFM specially, because we don't need
261 -- to do the lookup in fm1.
262 -- FM2 over-rides FM1.
264 plusFM EmptyFM fm2 = fm2
265 plusFM fm1 EmptyFM = fm1
266 plusFM fm1 (Branch split_key elt1 _ left right)
267 = mkVBalBranch split_key elt1 (plusFM lts left) (plusFM gts right)
269 lts = splitLT fm1 split_key
270 gts = splitGT fm1 split_key
272 minusFM EmptyFM fm2 = emptyFM
273 minusFM fm1 EmptyFM = fm1
274 minusFM fm1 (Branch split_key elt _ left right)
275 = glueVBal (minusFM lts left) (minusFM gts right)
276 -- The two can be way different, so we need glueVBal
278 lts = splitLT fm1 split_key -- NB gt and lt, so the equal ones
279 gts = splitGT fm1 split_key -- are not in either.
281 intersectFM fm1 fm2 = intersectFM_C (\ left right -> right) fm1 fm2
283 intersectFM_C combiner fm1 EmptyFM = emptyFM
284 intersectFM_C combiner EmptyFM fm2 = emptyFM
285 intersectFM_C combiner fm1 (Branch split_key elt2 _ left right)
287 | maybeToBool maybe_elt1 -- split_elt *is* in intersection
288 = mkVBalBranch split_key (combiner elt1 elt2) (intersectFM_C combiner lts left)
289 (intersectFM_C combiner gts right)
291 | otherwise -- split_elt is *not* in intersection
292 = glueVBal (intersectFM_C combiner lts left) (intersectFM_C combiner gts right)
295 lts = splitLT fm1 split_key -- NB gt and lt, so the equal ones
296 gts = splitGT fm1 split_key -- are not in either.
298 maybe_elt1 = lookupFM fm1 split_key
299 Just elt1 = maybe_elt1
302 %************************************************************************
304 \subsection{Mapping, folding, and filtering with @FiniteMaps@}
306 %************************************************************************
309 foldFM k z EmptyFM = z
310 foldFM k z (Branch key elt _ fm_l fm_r)
311 = foldFM k (k key elt (foldFM k z fm_r)) fm_l
313 mapFM f EmptyFM = emptyFM
314 mapFM f (Branch key elt size fm_l fm_r)
315 = Branch key (f key elt) size (mapFM f fm_l) (mapFM f fm_r)
317 filterFM p EmptyFM = emptyFM
318 filterFM p (Branch key elt _ fm_l fm_r)
319 | p key elt -- Keep the item
320 = mkVBalBranch key elt (filterFM p fm_l) (filterFM p fm_r)
322 | otherwise -- Drop the item
323 = glueVBal (filterFM p fm_l) (filterFM p fm_r)
326 %************************************************************************
328 \subsection{Interrogating @FiniteMaps@}
330 %************************************************************************
333 --{-# INLINE sizeFM #-}
335 sizeFM (Branch _ _ size _ _) = size
337 isEmptyFM fm = sizeFM fm == 0
339 lookupFM EmptyFM key = Nothing
340 lookupFM (Branch key elt _ fm_l fm_r) key_to_find
341 = case compare key_to_find key of
342 LT -> lookupFM fm_l key_to_find
343 GT -> lookupFM fm_r key_to_find
347 = case (lookupFM fm key) of { Nothing -> False; Just elt -> True }
349 lookupWithDefaultFM fm deflt key
350 = case (lookupFM fm key) of { Nothing -> deflt; Just elt -> elt }
353 %************************************************************************
355 \subsection{Listifying @FiniteMaps@}
357 %************************************************************************
360 fmToList fm = foldFM (\ key elt rest -> (key,elt) : rest) [] fm
361 keysFM fm = foldFM (\ key elt rest -> key : rest) [] fm
362 eltsFM fm = foldFM (\ key elt rest -> elt : rest) [] fm
366 %************************************************************************
368 \subsection{The implementation of balancing}
370 %************************************************************************
372 %************************************************************************
374 \subsubsection{Basic construction of a @FiniteMap@}
376 %************************************************************************
378 @mkBranch@ simply gets the size component right. This is the ONLY
379 (non-trivial) place the Branch object is built, so the ASSERTion
380 recursively checks consistency. (The trivial use of Branch is in
387 mkBranch :: (Ord key OUTPUTABLE_key) -- Used for the assertion checking only
390 -> FiniteMap key elt -> FiniteMap key elt
393 mkBranch which key elt fm_l fm_r
394 = --ASSERT( left_ok && right_ok && balance_ok )
395 #if defined(DEBUG_FINITEMAPS)
396 if not ( left_ok && right_ok && balance_ok ) then
397 pprPanic ("mkBranch:"++show which) (vcat [ppr [left_ok, right_ok, balance_ok],
404 result = Branch key elt (1 + left_size + right_size) fm_l fm_r
406 -- if sizeFM result <= 8 then
409 -- pprTrace ("mkBranch:"++(show which)) (ppr result) (
413 left_ok = case fm_l of
415 Branch left_key _ _ _ _ -> let
416 biggest_left_key = fst (findMax fm_l)
418 biggest_left_key < key
419 right_ok = case fm_r of
421 Branch right_key _ _ _ _ -> let
422 smallest_right_key = fst (findMin fm_r)
424 key < smallest_right_key
425 balance_ok = True -- sigh
428 = -- Both subtrees have one or no elements...
429 (left_size + right_size <= 1)
430 -- NO || left_size == 0 -- ???
431 -- NO || right_size == 0 -- ???
432 -- ... or the number of elements in a subtree does not exceed
433 -- sIZE_RATIO times the number of elements in the other subtree
434 || (left_size * sIZE_RATIO >= right_size &&
435 right_size * sIZE_RATIO >= left_size)
438 left_size = sizeFM fm_l
439 right_size = sizeFM fm_r
442 %************************************************************************
444 \subsubsection{{\em Balanced} construction of a @FiniteMap@}
446 %************************************************************************
448 @mkBalBranch@ rebalances, assuming that the subtrees aren't too far
452 mkBalBranch :: (Ord key OUTPUTABLE_key)
454 -> FiniteMap key elt -> FiniteMap key elt
457 mkBalBranch key elt fm_L fm_R
459 | size_l + size_r < 2
460 = mkBranch 1{-which-} key elt fm_L fm_R
462 | size_r > sIZE_RATIO * size_l -- Right tree too big
464 Branch _ _ _ fm_rl fm_rr
465 | sizeFM fm_rl < 2 * sizeFM fm_rr -> single_L fm_L fm_R
466 | otherwise -> double_L fm_L fm_R
467 -- Other case impossible
469 | size_l > sIZE_RATIO * size_r -- Left tree too big
471 Branch _ _ _ fm_ll fm_lr
472 | sizeFM fm_lr < 2 * sizeFM fm_ll -> single_R fm_L fm_R
473 | otherwise -> double_R fm_L fm_R
474 -- Other case impossible
476 | otherwise -- No imbalance
477 = mkBranch 2{-which-} key elt fm_L fm_R
483 single_L fm_l (Branch key_r elt_r _ fm_rl fm_rr)
484 = mkBranch 3{-which-} key_r elt_r (mkBranch 4{-which-} key elt fm_l fm_rl) fm_rr
486 double_L fm_l (Branch key_r elt_r _ (Branch key_rl elt_rl _ fm_rll fm_rlr) fm_rr)
487 = mkBranch 5{-which-} key_rl elt_rl (mkBranch 6{-which-} key elt fm_l fm_rll)
488 (mkBranch 7{-which-} key_r elt_r fm_rlr fm_rr)
490 single_R (Branch key_l elt_l _ fm_ll fm_lr) fm_r
491 = mkBranch 8{-which-} key_l elt_l fm_ll (mkBranch 9{-which-} key elt fm_lr fm_r)
493 double_R (Branch key_l elt_l _ fm_ll (Branch key_lr elt_lr _ fm_lrl fm_lrr)) fm_r
494 = mkBranch 10{-which-} key_lr elt_lr (mkBranch 11{-which-} key_l elt_l fm_ll fm_lrl)
495 (mkBranch 12{-which-} key elt fm_lrr fm_r)
500 mkVBalBranch :: (Ord key OUTPUTABLE_key)
502 -> FiniteMap key elt -> FiniteMap key elt
505 -- Assert: in any call to (mkVBalBranch_C comb key elt l r),
506 -- (a) all keys in l are < all keys in r
507 -- (b) all keys in l are < key
508 -- (c) all keys in r are > key
510 mkVBalBranch key elt EmptyFM fm_r = addToFM fm_r key elt
511 mkVBalBranch key elt fm_l EmptyFM = addToFM fm_l key elt
513 mkVBalBranch key elt fm_l@(Branch key_l elt_l _ fm_ll fm_lr)
514 fm_r@(Branch key_r elt_r _ fm_rl fm_rr)
515 | sIZE_RATIO * size_l < size_r
516 = mkBalBranch key_r elt_r (mkVBalBranch key elt fm_l fm_rl) fm_rr
518 | sIZE_RATIO * size_r < size_l
519 = mkBalBranch key_l elt_l fm_ll (mkVBalBranch key elt fm_lr fm_r)
522 = mkBranch 13{-which-} key elt fm_l fm_r
529 %************************************************************************
531 \subsubsection{Gluing two trees together}
533 %************************************************************************
535 @glueBal@ assumes its two arguments aren't too far out of whack, just
536 like @mkBalBranch@. But: all keys in first arg are $<$ all keys in
540 glueBal :: (Ord key OUTPUTABLE_key)
541 => FiniteMap key elt -> FiniteMap key elt
544 glueBal EmptyFM fm2 = fm2
545 glueBal fm1 EmptyFM = fm1
547 -- The case analysis here (absent in Adams' program) is really to deal
548 -- with the case where fm2 is a singleton. Then deleting the minimum means
549 -- we pass an empty tree to mkBalBranch, which breaks its invariant.
550 | sizeFM fm2 > sizeFM fm1
551 = mkBalBranch mid_key2 mid_elt2 fm1 (deleteMin fm2)
554 = mkBalBranch mid_key1 mid_elt1 (deleteMax fm1) fm2
556 (mid_key1, mid_elt1) = findMax fm1
557 (mid_key2, mid_elt2) = findMin fm2
560 @glueVBal@ copes with arguments which can be of any size.
561 But: all keys in first arg are $<$ all keys in second.
564 glueVBal :: (Ord key OUTPUTABLE_key)
565 => FiniteMap key elt -> FiniteMap key elt
568 glueVBal EmptyFM fm2 = fm2
569 glueVBal fm1 EmptyFM = fm1
570 glueVBal fm_l@(Branch key_l elt_l _ fm_ll fm_lr)
571 fm_r@(Branch key_r elt_r _ fm_rl fm_rr)
572 | sIZE_RATIO * size_l < size_r
573 = mkBalBranch key_r elt_r (glueVBal fm_l fm_rl) fm_rr
575 | sIZE_RATIO * size_r < size_l
576 = mkBalBranch key_l elt_l fm_ll (glueVBal fm_lr fm_r)
578 | otherwise -- We now need the same two cases as in glueBal above.
585 %************************************************************************
587 \subsection{Local utilities}
589 %************************************************************************
592 splitLT, splitGT :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> key -> FiniteMap key elt
594 -- splitLT fm split_key = fm restricted to keys < split_key
595 -- splitGT fm split_key = fm restricted to keys > split_key
597 splitLT EmptyFM split_key = emptyFM
598 splitLT (Branch key elt _ fm_l fm_r) split_key
599 = case compare split_key key of
600 LT -> splitLT fm_l split_key
601 GT -> mkVBalBranch key elt fm_l (splitLT fm_r split_key)
604 splitGT EmptyFM split_key = emptyFM
605 splitGT (Branch key elt _ fm_l fm_r) split_key
606 = case compare split_key key of
607 GT -> splitGT fm_r split_key
608 LT -> mkVBalBranch key elt (splitGT fm_l split_key) fm_r
611 findMin :: FiniteMap key elt -> (key,elt)
612 findMin (Branch key elt _ EmptyFM _) = (key,elt)
613 findMin (Branch key elt _ fm_l _) = findMin fm_l
615 deleteMin :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt
616 deleteMin (Branch key elt _ EmptyFM fm_r) = fm_r
617 deleteMin (Branch key elt _ fm_l fm_r) = mkBalBranch key elt (deleteMin fm_l) fm_r
619 findMax :: FiniteMap key elt -> (key,elt)
620 findMax (Branch key elt _ _ EmptyFM) = (key,elt)
621 findMax (Branch key elt _ _ fm_r) = findMax fm_r
623 deleteMax :: (Ord key OUTPUTABLE_key) => FiniteMap key elt -> FiniteMap key elt
624 deleteMax (Branch key elt _ fm_l EmptyFM) = fm_l
625 deleteMax (Branch key elt _ fm_l fm_r) = mkBalBranch key elt fm_l (deleteMax fm_r)
628 %************************************************************************
630 \subsection{Output-ery}
632 %************************************************************************
635 #if defined(DEBUG_FINITEMAPS)
637 instance (Outputable key) => Outputable (FiniteMap key elt) where
640 pprX EmptyFM = char '!'
641 pprX (Branch key elt sz fm_l fm_r)
642 = parens (hcat [pprX fm_l, space,
643 ppr key, space, int sz, space,
646 -- and when not debugging the package itself...
647 instance (Outputable key, Outputable elt) => Outputable (FiniteMap key elt) where
648 ppr fm = ppr (fmToList fm)
652 instance (Eq key, Eq elt) => Eq (FiniteMap key elt) where
653 fm_1 == fm_2 = (sizeFM fm_1 == sizeFM fm_2) && -- quick test
654 (fmToList fm_1 == fmToList fm_2)
656 {- NO: not clear what The Right Thing to do is:
657 instance (Ord key, Ord elt) => Ord (FiniteMap key elt) where
658 fm_1 <= fm_2 = (sizeFM fm_1 <= sizeFM fm_2) && -- quick test
659 (fmToList fm_1 <= fmToList fm_2)
664 %************************************************************************
666 \subsection{Efficiency pragmas for GHC}
668 %************************************************************************
670 When the FiniteMap module is used in GHC, we specialise it for
671 \tr{Uniques}, for dastardly efficiency reasons.
676 #if __GLASGOW_HASKELL__
678 {-# SPECIALIZE addListToFM
679 :: FiniteMap (FastString, FAST_STRING) elt -> [((FAST_STRING, FAST_STRING),elt)] -> FiniteMap (FAST_STRING, FAST_STRING) elt
680 , FiniteMap RdrName elt -> [(RdrName,elt)] -> FiniteMap RdrName elt
681 IF_NCG(COMMA FiniteMap Reg elt -> [(Reg COMMA elt)] -> FiniteMap Reg elt)
683 {-# SPECIALIZE addListToFM_C
684 :: (elt -> elt -> elt) -> FiniteMap TyCon elt -> [(TyCon,elt)] -> FiniteMap TyCon elt
685 , (elt -> elt -> elt) -> FiniteMap FastString elt -> [(FAST_STRING,elt)] -> FiniteMap FAST_STRING elt
686 IF_NCG(COMMA (elt -> elt -> elt) -> FiniteMap Reg elt -> [(Reg COMMA elt)] -> FiniteMap Reg elt)
688 {-# SPECIALIZE addToFM
689 :: FiniteMap CLabel elt -> CLabel -> elt -> FiniteMap CLabel elt
690 , FiniteMap FastString elt -> FAST_STRING -> elt -> FiniteMap FAST_STRING elt
691 , FiniteMap (FastString, FAST_STRING) elt -> (FAST_STRING, FAST_STRING) -> elt -> FiniteMap (FAST_STRING, FAST_STRING) elt
692 , FiniteMap RdrName elt -> RdrName -> elt -> FiniteMap RdrName elt
693 IF_NCG(COMMA FiniteMap Reg elt -> Reg -> elt -> FiniteMap Reg elt)
695 {-# SPECIALIZE addToFM_C
696 :: (elt -> elt -> elt) -> FiniteMap (RdrName, RdrName) elt -> (RdrName, RdrName) -> elt -> FiniteMap (RdrName, RdrName) elt
697 , (elt -> elt -> elt) -> FiniteMap FastString elt -> FAST_STRING -> elt -> FiniteMap FAST_STRING elt
698 IF_NCG(COMMA (elt -> elt -> elt) -> FiniteMap Reg elt -> Reg -> elt -> FiniteMap Reg elt)
700 {-# SPECIALIZE bagToFM
701 :: Bag (FastString,elt) -> FiniteMap FAST_STRING elt
703 {-# SPECIALIZE delListFromFM
704 :: FiniteMap RdrName elt -> [RdrName] -> FiniteMap RdrName elt
705 , FiniteMap FastString elt -> [FAST_STRING] -> FiniteMap FAST_STRING elt
706 IF_NCG(COMMA FiniteMap Reg elt -> [Reg] -> FiniteMap Reg elt)
708 {-# SPECIALIZE listToFM
709 :: [([Char],elt)] -> FiniteMap [Char] elt
710 , [(FastString,elt)] -> FiniteMap FAST_STRING elt
711 , [((FastString,FAST_STRING),elt)] -> FiniteMap (FAST_STRING, FAST_STRING) elt
712 IF_NCG(COMMA [(Reg COMMA elt)] -> FiniteMap Reg elt)
714 {-# SPECIALIZE lookupFM
715 :: FiniteMap CLabel elt -> CLabel -> Maybe elt
716 , FiniteMap [Char] elt -> [Char] -> Maybe elt
717 , FiniteMap FastString elt -> FAST_STRING -> Maybe elt
718 , FiniteMap (FastString,FAST_STRING) elt -> (FAST_STRING,FAST_STRING) -> Maybe elt
719 , FiniteMap RdrName elt -> RdrName -> Maybe elt
720 , FiniteMap (RdrName,RdrName) elt -> (RdrName,RdrName) -> Maybe elt
721 IF_NCG(COMMA FiniteMap Reg elt -> Reg -> Maybe elt)
723 {-# SPECIALIZE lookupWithDefaultFM
724 :: FiniteMap FastString elt -> elt -> FAST_STRING -> elt
725 IF_NCG(COMMA FiniteMap Reg elt -> elt -> Reg -> elt)
727 {-# SPECIALIZE plusFM
728 :: FiniteMap RdrName elt -> FiniteMap RdrName elt -> FiniteMap RdrName elt
729 , FiniteMap FastString elt -> FiniteMap FAST_STRING elt -> FiniteMap FAST_STRING elt
730 IF_NCG(COMMA FiniteMap Reg elt -> FiniteMap Reg elt -> FiniteMap Reg elt)
732 {-# SPECIALIZE plusFM_C
733 :: (elt -> elt -> elt) -> FiniteMap FastString elt -> FiniteMap FAST_STRING elt -> FiniteMap FAST_STRING elt
734 IF_NCG(COMMA (elt -> elt -> elt) -> FiniteMap Reg elt -> FiniteMap Reg elt -> FiniteMap Reg elt)
737 #endif /* compiling with ghc and have specialiser */