/
linear_scanProofScript.sml
6253 lines (5923 loc) · 244 KB
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linear_scanProofScript.sml
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(*
Proves correctness of the linear-scan register allocator.
*)
open preamble sptreeTheory reg_allocTheory linear_scanTheory reg_allocProofTheory libTheory
open ml_monadBaseTheory ml_monadBaseLib;
val _ = temp_delsimps ["lift_disj_eq", "lift_imp_disj"]
val _ = new_theory "linear_scanProof"
val _ = disable_tyabbrev_printing "type_ident"
val _ = disable_tyabbrev_printing "alist"
val _ = ParseExtras.temp_tight_equality();
val _ = monadsyntax.temp_add_monadsyntax()
Overload monad_bind[local] = ``st_ex_bind``
Overload monad_unitbind[local] = ``\x y. st_ex_bind x (\z. y)``
Overload monad_ignore_bind[local] = ``\x y. st_ex_bind x (\z. y)``
Overload return[local] = ``st_ex_return``
val _ = hide "state";
(* TODO: clean up this file: e.g., move things upstream *)
Theorem set_MAP_FST_toAList_eq_domain:
!s. set (MAP FST (toAList s)) = domain s
Proof
rw [EXTENSION, MEM_MAP, EXISTS_PROD, MEM_toAList, domain_lookup]
QED
Theorem numset_list_insert_FOLDL:
!l live. numset_list_insert l live = FOLDL (\live x. insert x () live) live l
Proof
Induct_on `l` >> rw [numset_list_insert_def]
QED
Theorem numset_list_insert_nottailrec_FOLDR:
!l live. numset_list_insert_nottailrec l live = FOLDR (\x live. insert x () live) live l
Proof
Induct_on `l` >> rw [numset_list_insert_nottailrec_def]
QED
Theorem both_numset_list_insert_equal:
!l live.
numset_list_insert l live = numset_list_insert_nottailrec (REVERSE l) live
Proof
rw [numset_list_insert_FOLDL, numset_list_insert_nottailrec_FOLDR, FOLDR_FOLDL_REVERSE]
QED
Theorem domain_numset_list_insert:
!l s. domain (numset_list_insert l s) = set l UNION domain s
Proof
Induct_on `l` >>
rw [numset_list_insert_def] >>
metis_tac [numset_list_insert_def, INSERT_UNION_EQ, UNION_COMM]
QED
(* why breaking encapsulation like this? To get rid of the assumption `wf s` *)
Theorem lookup_insert_id:
!x (y:unit) s. lookup x s = SOME () ==> s = insert x () s
Proof
recInduct insert_ind >>
rw []
THEN1 (
imp_res_tac domain_lookup >>
fs [domain_empty]
)
THEN1 (
fs [lookup_def] >>
once_rewrite_tac [insert_def] >>
simp []
)
THEN1 (
fs [lookup_def] >>
Cases_on `EVEN k` >> fs [] >>
once_rewrite_tac [insert_def] >>
rw []
)
THEN1 (
fs [lookup_def] >>
Cases_on `EVEN k` >> fs [] >>
Cases_on `k=0` >> fs [] >>
once_rewrite_tac [insert_def] >>
rw []
)
QED
Theorem numset_list_insert_FILTER:
!l live.
numset_list_insert (FILTER (λx. lookup x live = NONE) l) live =
numset_list_insert l live
Proof
sg `!x l live. lookup x live = SOME () ==> lookup x (numset_list_insert_nottailrec l live) = SOME ()` THEN1 (
Induct_on `l` >>
rw [numset_list_insert_nottailrec_def, lookup_insert]
) >>
rw [both_numset_list_insert_equal, GSYM FILTER_REVERSE] >>
qabbrev_tac `l' = REVERSE l` >>
qpat_x_assum `Abbrev _` kall_tac >>
Induct_on `l'` >>
rw [numset_list_insert_nottailrec_def] >>
Cases_on `lookup h live` >> fs [NOT_SOME_NONE] >>
simp [lookup_insert_id]
QED
Theorem domain_numset_list_delete:
!l s. domain (numset_list_delete l s) = (domain s) DIFF (set l)
Proof
Induct_on `l` >>
rw [numset_list_delete_def, DIFF_INSERT]
QED
Theorem check_partial_col_success_INJ_lemma:
!l live flive f.
domain flive = IMAGE f (domain live) /\
INJ f (domain live) UNIV /\
check_partial_col f l live flive = SOME (live',flive')
==>
INJ f (set l UNION domain live) UNIV
Proof
Induct_on `l` >> rw [] >>
fs [check_partial_col_def] >>
Cases_on `lookup h live` THEN1 (
Cases_on `lookup (f h) flive` >> fs [] >>
`domain (insert (f h) () flive) = IMAGE f (domain (insert h () live))` by metis_tac [domain_insert, IMAGE_INSERT] >>
sg `INJ f (domain (insert h () live)) UNIV` THEN1 (
rw [domain_insert, INJ_INSERT] >>
`(f y) IN (domain flive)` by rw [] >>
`(f h) NOTIN (domain flive)` by rw [domain_lookup, option_nchotomy] >>
metis_tac []
) >>
`INJ f (set l UNION domain (insert h () live)) UNIV` by metis_tac [] >>
metis_tac [INSERT_UNION_EQ, UNION_COMM, domain_insert]
) >>
fs [INSERT_UNION_EQ] >>
`h IN (domain live)` by rw [domain_lookup] >>
`h IN (set l) UNION (domain live)` by metis_tac [SUBSET_DEF, SUBSET_UNION] >>
`!(x : num) s. x IN s ==> x INSERT s = s` by metis_tac [INSERT_applied, IN_DEF, EXTENSION] >>
metis_tac []
QED
Theorem check_partial_col_success_INJ:
!l live flive f.
domain flive = IMAGE f (domain live) /\
INJ f (domain live) UNIV /\
check_partial_col f l live flive = SOME (live',flive')
==>
INJ f (set l UNION domain live) UNIV /\
INJ f (domain live') UNIV
Proof
rw [] >>
`domain live' = set l UNION domain live` by metis_tac [check_partial_col_domain, FST] >>
metis_tac [check_partial_col_success_INJ_lemma]
QED
Theorem check_partial_col_input_monotone:
!f live1 flive1 live2 flive2 l v.
IMAGE f (domain live1) = domain flive1 /\ IMAGE f (domain live2) = domain flive2 ==>
domain live1 SUBSET domain live2 ==>
INJ f (domain live2) UNIV ==>
check_partial_col f l live2 flive2 = SOME v ==>
?livein1 flivein1. check_partial_col f l live1 flive1 = SOME (livein1, flivein1)
Proof
rw [] >>
PairCases_on `v` >>
`INJ f (set l UNION domain live2) UNIV` by metis_tac [check_partial_col_success_INJ] >>
`set l UNION domain live1 SUBSET set l UNION domain live2` by fs [SUBSET_DEF] >>
`INJ f (set l UNION domain live1) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
metis_tac [check_partial_col_success]
QED
Theorem numset_list_delete_IMAGE:
!f l live flive v.
domain flive = IMAGE f (domain live) ==>
INJ f (domain live) UNIV ==>
check_partial_col f l live flive = SOME v ==>
domain (numset_list_delete (MAP f l) flive) = IMAGE f (domain (numset_list_delete l live))
Proof
rw [] >>
PairCases_on `v` >>
`INJ f (set l UNION domain live) UNIV` by metis_tac [check_partial_col_success_INJ] >>
rw [domain_numset_list_delete, EXTENSION] >>
eq_tac >> strip_tac
THEN1 (
fs [MEM_MAP] >>
metis_tac []
)
THEN1 (
strip_tac
THEN1 metis_tac [] >>
CCONTR_TAC >> fs [MEM_MAP, INJ_IFF] >>
metis_tac []
)
QED
Theorem check_partial_col_IMAGE:
!f l live flive live' flive'.
(domain flive) = IMAGE f (domain live) ==>
check_partial_col f l live flive = SOME (live', flive') ==>
(domain flive') = IMAGE f (domain live')
Proof
Induct_on `l` >>
fs [check_partial_col_def] >> rw [] >>
Cases_on`lookup h live` >>
Cases_on`lookup (f h) flive` >>
fs [] >>
`domain (insert (f h) () flive) = IMAGE f (domain (insert h () live))` by rw [domain_insert] >>
metis_tac []
QED
Theorem branch_domain:
!(live1 : num_set) (live2 : num_set).
set (MAP FST (toAList (difference live2 live1))) UNION domain live1 = domain live1 UNION domain live2
Proof
`!(live1 : num_set) (live2 : num_set). set (MAP FST (toAList (difference live2 live1))) = domain (difference live2 live1)` by rw [EXTENSION, MEM_MAP, MEM_toAList, EXISTS_PROD, domain_lookup] >>
`!(s : num -> bool) (t : num -> bool). t DIFF s UNION s = s UNION t` by (rw [EXTENSION] >> Cases_on `x IN t` >> rw []) >>
rw [domain_difference]
QED
Theorem check_partial_col_branch_domain:
!(live1 : num_set) (live2 : num_set) flive1 liveout fliveout.
check_partial_col f (MAP FST (toAList (difference live2 live1))) live1 flive1 = SOME (liveout, fliveout) ==>
domain liveout = domain live1 UNION domain live2
Proof
metis_tac [branch_domain, check_partial_col_domain, FST]
QED
Theorem check_partial_col_branch_comm:
!f live1 flive1 live2 flive2 a b.
INJ f (domain live1) UNIV ==>
domain flive1 = IMAGE f (domain live1) /\ domain flive2 = IMAGE f (domain live2) ==>
check_partial_col f (MAP FST (toAList (difference live2 live1))) live1 flive1 = SOME (a, b) ==>
?c d. check_partial_col f (MAP FST (toAList (difference live1 live2))) live2 flive2 = SOME (c, d)
Proof
rw [] >>
`domain a = domain live1 UNION domain live2` by metis_tac [check_partial_col_domain, branch_domain, FST] >>
`INJ f (domain live1 UNION domain live2) UNIV` by metis_tac [check_partial_col_success_INJ] >>
`set (MAP FST (toAList (difference live1 live2))) UNION domain live2 = domain live1 UNION domain live2` by metis_tac [UNION_COMM, domain_difference, branch_domain] >>
metis_tac [check_partial_col_success]
QED
Theorem check_partial_col_list_monotone:
!f live flive (s1 : num_set) (s2 : num_set) a b.
domain flive = IMAGE f (domain live) ==>
INJ f (domain live) UNIV ==>
domain s1 SUBSET domain s2 ==>
check_partial_col f (MAP FST (toAList s2)) live flive= SOME (a, b) ==>
?c d. check_partial_col f (MAP FST (toAList s1)) live flive = SOME (c, d)
Proof
rw [] >>
`!(s : num_set). set (MAP FST (toAList s)) = domain s` by rw [EXTENSION, MEM_MAP, MEM_toAList, EXISTS_PROD, domain_lookup] >>
`INJ f (domain a) UNIV` by metis_tac [check_partial_col_success_INJ] >>
`domain a = (domain s2 UNION domain live)` by metis_tac [check_partial_col_domain, FST] >>
`domain s1 UNION domain live SUBSET domain a` by fs [SUBSET_DEF] >>
`INJ f (domain s1 UNION domain live) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
metis_tac [check_partial_col_success]
QED
Theorem check_live_tree_success:
!lt live flive live' flive' f.
domain flive = IMAGE f (domain live) /\
INJ f (domain live) UNIV /\
check_live_tree f lt live flive = SOME (live',flive') ==>
domain flive' = IMAGE f (domain live') /\
INJ f (domain live') UNIV
Proof
Induct_on `lt`
(* Writes *)
THEN1 (
rw [check_live_tree_def] >>
fs [case_eq_thms]
THEN1 (
metis_tac [numset_list_delete_IMAGE]
)
THEN1 (
`domain live' SUBSET domain live` by metis_tac [domain_numset_list_delete, DIFF_SUBSET] >>
metis_tac [INJ_SUBSET, UNIV_SUBSET]
)
)
(* Reads *)
THEN1 (
rw [check_live_tree_def]
THEN1 metis_tac [check_partial_col_IMAGE]
THEN1 metis_tac [check_partial_col_success_INJ]
)
(* Branch *)
THEN1 (
rw [check_live_tree_def] >>
fs [case_eq_thms] >> rveq
THEN1 (
metis_tac [check_partial_col_IMAGE]
)
THEN1 (
`INJ f (domain livein1) UNIV` by metis_tac [] >>
`domain flivein1 = IMAGE f (domain livein1)` by metis_tac [check_partial_col_IMAGE] >>
metis_tac [check_partial_col_success_INJ]
)
)
(* Seq *)
THEN1 (
rw [check_live_tree_def] >>
fs [case_eq_thms] >> rveq >>
`domain flivein2 = IMAGE f (domain livein2)` by metis_tac [] >>
`INJ f (domain livein2) UNIV` by metis_tac [] >>
metis_tac []
)
QED
Theorem ALL_DISTINCT_INJ_MAP:
!f l. ALL_DISTINCT (MAP f l) ==> INJ f (set l) UNIV
Proof
Induct_on `l` >> rw [INJ_INSERT] >>
`MEM (f y) (MAP f l)` by metis_tac [MEM_MAP] >>
`~(MEM (f y) (MAP f l))` by metis_tac []
QED
Theorem check_col_output:
!f live live' flive'.
check_col f live = SOME (live', flive') ==>
domain flive' = IMAGE f (domain live') /\
INJ f (domain live') UNIV
Proof
rw [check_col_def]
THEN1 (
rw [EXTENSION, domain_fromAList, MEM_MAP] >>
rw [MEM_toAList, EXISTS_PROD, domain_lookup, PULL_EXISTS]
)
THEN1 (
`INJ f (set (MAP FST (toAList live))) UNIV` by metis_tac [ALL_DISTINCT_INJ_MAP, MAP_MAP_o] >>
`set (MAP FST (toAList live)) = domain live` by rw [EXTENSION, MEM_MAP, MEM_toAList, EXISTS_PROD, domain_lookup] >>
metis_tac []
)
QED
Theorem check_col_success:
!f live.
INJ f (domain live) UNIV ==>
?flive. check_col f live = SOME (live, flive)
Proof
rw [check_col_def] >>
sg `!x y. MEM x (MAP FST (toAList live)) /\ MEM y (MAP FST (toAList live)) /\ (f x = f y) ==> (x = y)` THEN1 (
rw [MEM_toAList, MEM_MAP, EXISTS_PROD] >>
`x IN domain live /\ y IN domain live` by rw [domain_lookup] >>
fs [INJ_DEF]
) >>
metis_tac [ALL_DISTINCT_MAP_INJ, MAP_MAP_o, ALL_DISTINCT_MAP_FST_toAList]
QED
Theorem check_clash_tree_output:
!f ct live flive livein flivein.
domain flive = IMAGE f (domain live) /\
INJ f (domain live) UNIV /\
check_clash_tree f ct live flive = SOME (livein, flivein) ==>
domain flivein = IMAGE f (domain livein) /\
INJ f (domain livein) UNIV
Proof
Induct_on `ct` >>
simp [check_clash_tree_def]
(* Delta *)
THEN1 (
rpt gen_tac >> strip_tac >>
fs [case_eq_thms] >>
`domain (numset_list_delete (MAP f l) flive) = IMAGE f (domain (numset_list_delete l live))` by metis_tac [numset_list_delete_IMAGE] >>
`domain (numset_list_delete l live) SUBSET (domain live)` by rw [domain_numset_list_delete] >>
`INJ f (domain (numset_list_delete l live)) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
strip_tac
THEN1 metis_tac [check_partial_col_IMAGE]
THEN1 metis_tac [check_partial_col_success_INJ]
)
(* Set *)
THEN1 (
rw [] >> metis_tac [check_col_output]
)
(* Branch *)
THEN1 (
rpt gen_tac >> strip_tac >>
fs [case_eq_thms] >> rveq
THEN1 (
`domain ft1_out = IMAGE f (domain t1_out)` by metis_tac [check_partial_col_IMAGE] >>
`INJ f (domain t1_out) UNIV` by metis_tac [check_partial_col_success_INJ] >>
strip_tac
THEN1 metis_tac [check_partial_col_IMAGE]
THEN1 metis_tac [check_partial_col_success_INJ]
)
THEN1 metis_tac [check_col_output]
)
(* Seq *)
THEN1 (
rpt gen_tac >> strip_tac >>
fs [case_eq_thms] >> rveq >>
`domain ft2_out = IMAGE f (domain t2_out) /\ INJ f (domain t2_out) UNIV` by metis_tac [] >>
metis_tac []
)
QED
Theorem get_live_tree_correct_lemma:
!f live flive live' flive' ct livein' flivein'.
IMAGE f (domain live) = domain flive /\ IMAGE f (domain live') = domain flive' ==>
INJ f (domain live') UNIV ==>
domain live SUBSET domain live' ==>
check_live_tree f (get_live_tree ct) live' flive' = SOME (livein', flivein') ==>
?livein flivein. check_clash_tree f ct live flive = SOME (livein, flivein) /\
domain livein SUBSET domain livein'
Proof
Induct_on `ct`
(* Delta *)
THEN1 (
rw [check_clash_tree_def, get_live_tree_def, check_live_tree_def] >>
qabbrev_tac `lrd = l0` >> qabbrev_tac `lwr = l` >> rpt (qpat_x_assum `Abbrev _` kall_tac) >>
fs [case_eq_thms] >> rveq >>
`?v. check_partial_col f lwr live flive = SOME v` by metis_tac [check_partial_col_input_monotone] >>
rw [] >>
`INJ f (domain live) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`IMAGE f (domain (numset_list_delete lwr live)) = domain (numset_list_delete (MAP f lwr) flive)` by metis_tac [numset_list_delete_IMAGE] >>
`IMAGE f (domain (numset_list_delete lwr live')) = domain (numset_list_delete (MAP f lwr) flive')` by metis_tac [numset_list_delete_IMAGE] >>
sg `INJ f (domain (numset_list_delete lwr live')) UNIV` THEN1 (
rw [domain_numset_list_delete] >>
`(domain live' DIFF set lwr) SUBSET (domain live')` by fs [SUBSET_DIFF] >>
metis_tac [SUBSET_DIFF, INJ_SUBSET, UNIV_SUBSET]
) >>
`domain (numset_list_delete lwr live) SUBSET domain (numset_list_delete lwr live')` by fs [domain_numset_list_delete, SUBSET_DEF] >>
`?live1' flive1'. check_partial_col f lrd (numset_list_delete lwr live) (numset_list_delete (MAP f lwr) flive) = SOME (live1', flive1')` by metis_tac [check_partial_col_input_monotone] >>
rw [] >>
imp_res_tac check_partial_col_domain >>
fs [] >> fs [domain_numset_list_delete, SUBSET_DEF]
)
(* Set *)
THEN1 (
rw [check_clash_tree_def, get_live_tree_def, check_live_tree_def] >>
imp_res_tac check_partial_col_domain >> fs [] >>
imp_res_tac check_partial_col_success_INJ >> rfs [] >>
`set (MAP FST (toAList s)) = domain s` by rw [EXTENSION, MEM_MAP, EXISTS_PROD, MEM_toAList, domain_lookup] >>
fs [] >>
`domain s SUBSET domain s UNION domain live'` by fs [] >>
`INJ f (domain s) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`?livein flivein. check_col f s = SOME (livein, flivein)` by metis_tac [check_col_success] >>
rw [] >>
fs [check_col_def]
)
(* Branch *)
THEN1 (
rw [check_clash_tree_def, get_live_tree_def, check_live_tree_def] >>
Cases_on `o'` >> fs [check_live_tree_def] >>
fs [case_eq_thms] >> rveq >>
(* Try to get consistent names *)
TRY (
qabbrev_tac `cutset = x` >>
qabbrev_tac `livemid = livein2'` >> qabbrev_tac `flivemid = flivein2'` >>
rpt (qpat_x_assum `Abbrev _` kall_tac)
) >>
qabbrev_tac `livein1' = livein1` >> qabbrev_tac `flivein1' = flivein1` >>
qabbrev_tac `livein2' = livein2` >> qabbrev_tac `flivein2' = flivein2` >>
rpt (qpat_x_assum `Abbrev _` kall_tac) >>
`?livein1 flivein1. check_clash_tree f ct live flive = SOME (livein1, flivein1) /\ domain livein1 SUBSET domain livein1'` by metis_tac [] >>
`?livein2 flivein2. check_clash_tree f ct' live flive = SOME (livein2, flivein2) /\ domain livein2 SUBSET domain livein2'` by metis_tac [] >>
rw []
THEN1 (
imp_res_tac check_live_tree_success >> rfs [] >>
`INJ f (set (MAP FST (toAList (difference livein2' livein1')))
UNION domain livein1') UNIV` by
metis_tac [check_partial_col_success_INJ] >>
`set (MAP FST (toAList (difference livein2 livein1)))
UNION domain livein1 SUBSET set
(MAP FST (toAList (difference livein2' livein1')))
UNION domain livein1'` by
(REWRITE_TAC [branch_domain] >> fs [SUBSET_DEF]) >>
`INJ f (set (MAP FST (toAList (difference livein2 livein1)))
UNION domain livein1) UNIV` by
metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`INJ f (domain live) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`domain flivein1 = IMAGE f (domain livein1)` by
metis_tac [check_clash_tree_output] >>
`?livein flivein. check_partial_col f
(MAP FST (toAList (difference livein2 livein1)))
livein1 flivein1 = SOME (livein, flivein)` by
metis_tac [check_partial_col_success] >>
rw [] >>
`domain livein = set (MAP FST (toAList (difference livein2 livein1))) UNION domain livein1` by metis_tac [check_partial_col_domain, FST] >>
`domain livein' = set (MAP FST (toAList (difference livein2' livein1'))) UNION domain livein1'` by metis_tac [check_partial_col_domain, FST] >>
fs []
)
THEN1 (
`domain flivein1' = IMAGE f (domain livein1') /\ INJ f (domain livein1') UNIV` by metis_tac [check_live_tree_success] >>
`domain flivein2' = IMAGE f (domain livein2') /\ INJ f (domain livein2') UNIV` by metis_tac [check_live_tree_success] >>
`domain flivemid = IMAGE f (domain livemid) /\ INJ f (domain livemid) UNIV` by metis_tac [check_partial_col_success_INJ, check_partial_col_IMAGE] >>
`INJ f (domain livein') UNIV` by metis_tac [check_partial_col_success_INJ] >>
`domain livein' = set (MAP FST (toAList cutset)) UNION domain livemid` by metis_tac [check_partial_col_domain, FST] >>
`set (MAP FST (toAList cutset)) = domain cutset` by rw [EXTENSION, MEM_MAP, EXISTS_PROD, MEM_toAList, domain_lookup] >>
`domain cutset SUBSET domain livein'` by fs [] >>
`INJ f (domain cutset) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`?livein flivein. check_col f cutset = SOME (livein, flivein)` by metis_tac [check_col_success] >>
rw [] >>
fs [check_col_def]
)
)
(* Seq *)
THEN1 (
rw [check_clash_tree_def, get_live_tree_def, check_live_tree_def] >>
fs [case_eq_thms] >> rveq >>
`?t2_out ft2_out. check_clash_tree f ct' live flive = SOME (t2_out, ft2_out) /\ domain t2_out SUBSET domain livein2` by metis_tac [] >>
`INJ f (domain live) UNIV` by metis_tac [INJ_SUBSET, UNIV_SUBSET] >>
`IMAGE f (domain t2_out) = domain ft2_out` by metis_tac [check_clash_tree_output] >>
simp [] >>
`IMAGE f (domain livein2) = domain flivein2` by metis_tac [check_live_tree_success] >>
`INJ f (domain livein2) UNIV` by metis_tac [check_live_tree_success] >>
metis_tac []
)
QED
Theorem get_live_tree_correct:
!f live flive ct livein flivein.
IMAGE f (domain live) = domain flive ==>
INJ f (domain live) UNIV ==>
check_live_tree f (get_live_tree ct) live flive = SOME (livein, flivein) ==>
?livein' flivein'. check_clash_tree f ct live flive = SOME (livein', flivein')
Proof
metis_tac [get_live_tree_correct_lemma, SUBSET_REFL]
QED
Theorem get_live_tree_correct_LN:
!f ct livein flivein.
check_live_tree f (get_live_tree ct) LN LN = SOME (livein, flivein) ==>
?livein' flivein'. check_clash_tree f ct LN LN = SOME (livein', flivein')
Proof
rw [get_live_tree_correct]
QED
Theorem check_partial_col_numset_list_insert:
!f l live flive liveout fliveout.
check_partial_col f l live flive = SOME (liveout, fliveout) ==>
liveout = numset_list_insert l live
Proof
Induct_on `l` >>
rw [numset_list_insert_def, check_partial_col_def] >>
Cases_on `lookup h live` >> fs []
THEN1 (
Cases_on `lookup (f h) flive` >> fs [] >>
res_tac
)
THEN1 (
`live = insert h () live` by rw [lookup_insert_id] >>
metis_tac []
)
QED
Theorem check_live_tree_eq_get_live_backward:
!f lt live flive liveout fliveout.
check_live_tree f lt live flive = SOME (liveout, fliveout) ==>
liveout = get_live_backward lt live
Proof
Induct_on `lt` >>
rw [check_live_tree_def, get_live_backward_def]
(* Writes *)
THEN1 (
every_case_tac >> fs []
)
(* Reads *)
THEN1 (
metis_tac [check_partial_col_numset_list_insert]
)
(* Branch *)
THEN1 (
every_case_tac >> fs [] >>
res_tac >>
metis_tac [check_partial_col_numset_list_insert]
)
(* Seq *)
THEN1 (
every_case_tac >> fs [] >>
res_tac >>
metis_tac []
)
QED
Theorem fix_domination_fixes_domination:
!lt. domain (get_live_backward (fix_domination lt) LN) = EMPTY
Proof
rw [get_live_backward_def, fix_domination_def, domain_numset_list_delete] >>
rw [EXTENSION, MEM_MAP, MEM_toAList, EXISTS_PROD, domain_lookup]
QED
Theorem fix_domination_check_live_tree:
!f lt liveout fliveout.
check_live_tree f (fix_domination lt) LN LN = SOME (liveout, fliveout) ==>
?liveout' fliveout'. check_live_tree f lt LN LN = SOME (liveout', fliveout')
Proof
rw [check_live_tree_def, fix_domination_def] >>
Cases_on `check_live_tree f lt LN LN` >> fs [] >>
Cases_on `x` >> fs []
QED
Theorem size_of_live_tree_positive:
!lt. 0 <= size_of_live_tree lt
Proof
Induct_on `lt` >> rw [size_of_live_tree_def]
QED
Theorem check_number_property_strong_monotone_weak:
!P Q lt n live.
(!n' live'. P n' live' ==> Q n' live') /\
check_number_property_strong P lt n live ==>
check_number_property_strong Q lt n live
Proof
Induct_on `lt` >>
rw [check_number_property_strong_def] >>
res_tac >> simp []
QED
Theorem check_number_property_strong_monotone:
!P Q lt n live.
(!n' live'. (n - size_of_live_tree lt) <= n' /\ P n' live' ==> Q n' live') /\
check_number_property_strong P lt n live ==>
check_number_property_strong Q lt n live
Proof
Induct_on `lt` >>
simp [check_number_property_strong_def, size_of_live_tree_def]
(* Branch & Seq *)
>> (
rw []
THEN1 (
`!n' live'. n - size_of_live_tree lt' - size_of_live_tree lt <= n' /\ P n' live' ==> Q n' live'` by (
rw [] >>
`n - (size_of_live_tree lt + size_of_live_tree lt') <= n'` by intLib.COOPER_TAC >>
rw []
) >>
metis_tac []
)
THEN1 (
`0 <= size_of_live_tree lt /\ 0 <= size_of_live_tree lt'` by rw [size_of_live_tree_positive] >>
`(!n' live'. n - size_of_live_tree lt' <= n' /\ P n' live' ==> Q n' live')` by (
rw [] >>
`n - (size_of_live_tree lt + size_of_live_tree lt') <= n'` by intLib.COOPER_TAC >>
rw []
) >>
metis_tac []
)
)
QED
Theorem check_number_property_strong_end:
!P lt n live.
check_number_property_strong P lt n live ==>
P (n - size_of_live_tree lt) (get_live_backward lt live)
Proof
Induct_on `lt` >>
rw [check_number_property_strong_def, get_live_backward_def, size_of_live_tree_def] >>
(* Seq *)
res_tac >>
`n - size_of_live_tree lt' - size_of_live_tree lt = n - (size_of_live_tree lt + size_of_live_tree lt')` by intLib.COOPER_TAC >>
metis_tac []
QED
Theorem check_number_property_monotone_weak:
!P Q lt n live.
(!n' live'. P n' live' ==> Q n' live') /\
check_number_property P lt n live ==>
check_number_property Q lt n live
Proof
Induct_on `lt` >>
rw [check_number_property_def] >>
res_tac >> simp []
QED
Theorem lookup_numset_list_add_if:
!r l v s.
lookup r (numset_list_add_if l v s P) =
if MEM r l then
case lookup r s of
| (SOME vr) =>
if P v vr then SOME v
else SOME vr
| NONE =>
SOME v
else
lookup r s
Proof
Induct_on `l` >>
simp [numset_list_add_if_def] >>
rpt gen_tac >>
Cases_on `lookup h s` >> fs []
THEN1 (
Cases_on `MEM r l` >> fs [] >>
rw [lookup_insert]
) >>
Cases_on `r = h` >> fs [] >> rveq
THEN1 (
Cases_on `P v x` >> fs []
) >>
Cases_on `P v x` >> fs [] >>
simp [lookup_insert]
QED
Theorem lookup_numset_list_add_if_lt:
!r l v s.
lookup r (numset_list_add_if_lt l v s) =
if MEM r l then
case lookup r s of
| (SOME vr) =>
if v <= vr then SOME v
else SOME vr
| NONE =>
SOME v
else
lookup r s
Proof
simp [numset_list_add_if_lt_def] >>
rw [lookup_numset_list_add_if]
QED
Theorem lookup_numset_list_add_if_gt:
!r l v s.
lookup r (numset_list_add_if_gt l v s) =
if MEM r l then
case lookup r s of
| (SOME vr) =>
if vr <= v then SOME v
else SOME vr
| NONE =>
SOME v
else
lookup r s
Proof
simp [numset_list_add_if_gt_def] >>
rw [lookup_numset_list_add_if]
QED
Theorem domain_numset_list_add_if:
!l v s P. domain (numset_list_add_if l v s P) = set l UNION domain s
Proof
Induct_on `l` >>
rw [numset_list_add_if_def] >>
Cases_on `lookup h s`
THEN1 (
rw [EXTENSION] >>
metis_tac []
)
THEN1 (
`h IN domain s` by rw [domain_lookup] >>
rw [EXTENSION] >>
metis_tac []
)
QED
Theorem domain_numset_list_add_if_lt:
!l v s. domain (numset_list_add_if_lt l v s) = set l UNION domain s
Proof
rw [numset_list_add_if_lt_def, domain_numset_list_add_if]
QED
Theorem domain_numset_list_add_if_gt:
!l v s. domain (numset_list_add_if_gt l v s) = set l UNION domain s
Proof
rw [numset_list_add_if_gt_def, domain_numset_list_add_if]
QED
Theorem lookup_numset_list_delete:
!l s x. lookup x (numset_list_delete l s) = if MEM x l then NONE else lookup x s
Proof
Induct_on `l` >>
rw [numset_list_delete_def, lookup_delete] >>
fs []
QED
Theorem get_intervals_nout:
!lt n_in beg_in end_in n_out beg_out end_out.
(n_out, beg_out, end_out) = get_intervals lt n_in beg_in end_in ==>
n_out = n_in - (size_of_live_tree lt)
Proof
Induct_on `lt` >>
rw [get_intervals_def, size_of_live_tree_def] >>
rpt (pairarg_tac >> fs []) >>
`n_out = n2 - (size_of_live_tree lt)` by metis_tac [] >>
`n2 = n_in - (size_of_live_tree lt')` by metis_tac [] >>
intLib.COOPER_TAC
QED
Theorem get_intervals_withlive_nout:
!lt n_in beg_in end_in n_out beg_out end_out live.
(n_out, beg_out, end_out) = get_intervals_withlive lt n_in beg_in end_in live ==>
n_out = n_in - (size_of_live_tree lt)
Proof
Induct_on `lt` >>
rw [get_intervals_withlive_def, size_of_live_tree_def] >>
rpt (pairarg_tac >> fs []) >>
`n_out = n2 - (size_of_live_tree lt)` by metis_tac [] >>
`n2 = n_in - (size_of_live_tree lt')` by metis_tac [] >>
rveq >> intLib.COOPER_TAC
QED
Theorem get_intervals_intend_augment:
!lt n_in beg_in end_in n_out beg_out end_out.
(n_out, beg_out, end_out) = get_intervals lt n_in beg_in end_in ==>
!r v. lookup r end_in = SOME v ==> (?v'. lookup r end_out = SOME v' /\ v <= v')
Proof
Induct_on `lt` >>
rw [get_intervals_def]
(* Writes *)
THEN1 (
rw [lookup_numset_list_add_if_gt]
)
(* Reads *)
THEN1 (
rw [lookup_numset_list_add_if_gt]
) >>
(* Branch & Seq *)
rpt (pairarg_tac >> fs []) >>
`?v'. lookup r int_end2 = SOME v' /\ v <= v'` by metis_tac [] >>
`?v''. lookup r end_out = SOME v'' /\ v' <= v''` by metis_tac [] >>
rw [] >>
intLib.COOPER_TAC
QED
Theorem check_number_property_intend:
!end_out lt n_in live_in.
check_number_property (\n (live : num_set). !r. r IN domain live ==> ?v. lookup r end_out = SOME v /\ n+1 <= v) lt n_in live_in ==>
!r. r IN domain (get_live_backward lt live_in) ==> ?v. lookup r end_out = SOME v /\ n_in-(size_of_live_tree lt) <= v
Proof
Induct_on `lt` >>
rw [check_number_property_def, get_live_backward_def, size_of_live_tree_def]
(* Writes *)
THEN1 (
res_tac >>
rw [] >>
intLib.COOPER_TAC
)
(* Reads *)
THEN1 (
res_tac >>
rw [] >>
intLib.COOPER_TAC
)
(* Branch *)
THEN1 (
fs [branch_domain, domain_numset_list_insert] >>
res_tac >> rw [] >>
`0 <= size_of_live_tree lt /\ 0 <= size_of_live_tree lt'` by rw [size_of_live_tree_positive] >>
intLib.COOPER_TAC
)
(* Seq *)
THEN1 (
res_tac >> rw [] >>
intLib.COOPER_TAC
)
QED
Theorem get_intervals_live_less_end:
!lt n_in beg_in end_in live_in n_out beg_out end_out.
(n_out, beg_out, end_out) = get_intervals lt n_in beg_in end_in /\
(!r. r IN domain live_in ==> ?v. lookup r end_in = SOME v /\ n_in <= v) ==>
check_number_property (\n (live : num_set). !r. r IN domain live ==> ?v. lookup r end_out = SOME v /\ n+1 <= v) lt n_in live_in
Proof
Induct_on `lt` >>
simp [get_intervals_def, check_number_property_def] >>
rpt gen_tac >> strip_tac >> rveq
(* Writes *)
THEN1 (
rw [domain_numset_list_delete, lookup_numset_list_add_if_gt]
)
(* Reads *)
THEN1 (
rw [domain_numset_list_insert, lookup_numset_list_add_if_gt] >>
every_case_tac >> rw [] >> intLib.COOPER_TAC
) >>
(* Common Branch & Seq proof *)
rpt (pairarg_tac >> fs []) >>
`n2 = n_in - (size_of_live_tree lt') /\ n_out = n2 - (size_of_live_tree lt)` by metis_tac [get_intervals_nout] >>
`check_number_property (\n live. !r. r IN domain live ==> ?v. lookup r int_end2 = SOME v /\ n+1 <= v) lt' n_in live_in` by metis_tac [] >>
`check_number_property (\n live. !r. r IN domain live ==> ?v. lookup r end_out = SOME v /\ n+1 <= v) lt' n_in live_in` by (
sg `!n' (live' : num_set). (\n live. !r. r IN domain live ==>
?v. lookup r int_end2 = SOME v /\ n+1 <= v) n' live' ==>
(\n live. !r. r IN domain live ==>
?v. lookup r end_out = SOME v /\ n+1 <= v) n' live'` THEN1 (
rw [] >>
`?v. lookup r int_end2 = SOME v /\ n'+1 <= v` by rw [] >>
`?v'. lookup r end_out = SOME v' /\ v <= v'` by metis_tac [get_intervals_intend_augment] >>
rw [] >> intLib.COOPER_TAC
) >>
qspecl_then [`\n live. !r. r IN domain live ==> ?v. lookup r int_end2 = SOME v /\ n+1 <= v`,
`\n live. !r. r IN domain live ==> ?v. lookup r end_out = SOME v /\ n+1 <= v`, `lt'`, `n_in`, `live_in`]
assume_tac check_number_property_monotone_weak >>
rw []
) >>
`0 <= size_of_live_tree lt /\ 0 <= size_of_live_tree lt'` by rw [size_of_live_tree_positive] >>
simp []
(* Branch *)
THEN1 (
sg `!r. r IN domain live_in ==> ?v. lookup r int_end2 = SOME v /\ n2 <= v` THEN1 (
rw [] >>
`?v. lookup r end_in = SOME v /\ n_in <= v` by rw [] >>
`?v'. lookup r int_end2 = SOME v' /\ v <= v'` by metis_tac [get_intervals_intend_augment] >>
rw [] >>
intLib.COOPER_TAC
) >>
metis_tac []
)
(* Seq *)
THEN1 (
`!r. r IN domain (get_live_backward lt' live_in) ==> ?v. lookup r int_end2 = SOME v /\ n_in - size_of_live_tree lt' <= v` by metis_tac [check_number_property_intend] >>
metis_tac []
)
QED
Theorem get_intervals_withlive_intbeg_reduce:
!lt n_in beg_in end_in n_out beg_out end_out live.
(n_out, beg_out, end_out) = get_intervals_withlive lt n_in beg_in end_in live /\
(!r v. lookup r beg_in = SOME v ==> n_in <= v) ==>
(!r. option_CASE (lookup r beg_out) n_out (\x.x) <= option_CASE (lookup r beg_in) n_in (\x.x)) /\
(!r v. lookup r beg_out = SOME v ==> n_out <= v)
Proof
Induct_on `lt` >>
simp [get_intervals_withlive_def] >>
rpt gen_tac >> strip_tac
(* Writes *)
THEN1 (
rpt strip_tac >>
fs [lookup_numset_list_add_if_lt] >>
rw [] >>
every_case_tac >>
res_tac >>
rw [] >>
intLib.COOPER_TAC
)
(* Reads *)
THEN1 (
rpt strip_tac >>
fs [lookup_numset_list_delete] >>
rw [] >>
every_case_tac >>
res_tac >>
rw [] >>
intLib.COOPER_TAC
)
(* Branch *)
THEN1 (
rpt (pairarg_tac >> fs []) >>
`(!r. option_CASE (lookup r int_beg2) n2 (\x.x) <= option_CASE (lookup r beg_in) n_in (\x.x)) /\ (!r v. lookup r int_beg2 = SOME v ==> n2 <= v)` by (res_tac >> metis_tac []) >>
`!r v. lookup r (difference int_beg2 live) = SOME v ==> n2 <= v` by (rw [lookup_difference] >> res_tac) >>
`(!r. option_CASE (lookup r int_beg1) n1 (\x.x) <=
option_CASE (lookup r (difference int_beg2 live)) n2 (\x.x)) /\
(!r v. lookup r (difference int_beg2 live) = SOME v ==> n2 <= v) /\
(!r v. lookup r int_beg1 = SOME v ==> n1 <= v)` by
(res_tac >> metis_tac []) >>
fs [lookup_difference] >>
`n2 = n_in - size_of_live_tree lt'` by metis_tac [get_intervals_withlive_nout] >>
`n1 = n2 - size_of_live_tree lt` by metis_tac [get_intervals_withlive_nout] >>
`0 <= size_of_live_tree lt /\ 0 <= size_of_live_tree lt'` by rw [size_of_live_tree_positive] >>
rpt strip_tac
THEN1 (
rpt (first_x_assum (qspec_then `r` assume_tac)) >>
rpt CASE_TAC >>
Cases_on `lookup r int_beg1` >> Cases_on `lookup r int_beg2` >>
Cases_on `lookup r live` >>
rfs [] >> fs [set_MAP_FST_toAList_eq_domain] >> rw [] >>
rpt (qpat_x_assum `lookup _ _ = _` kall_tac) >>
intLib.COOPER_TAC
)
THEN1 res_tac
)
(* Seq*)
THEN1 (
rpt (pairarg_tac >> fs []) >>
`(!r. option_CASE (lookup r int_beg2) n2 (\x.x) <=
option_CASE (lookup r beg_in) n_in (\x.x)) /\
(!r v. lookup r beg_in = SOME v ==> n_in <= v) /\
(!r v. lookup r int_beg2 = SOME v ==> n2 <= v)` by
(res_tac >> metis_tac []) >>
`(!r. option_CASE (lookup r int_beg1) n1 (\x.x) <=
option_CASE (lookup r int_beg2) n2 (\x.x)) /\
(!r v. lookup r int_beg2 = SOME v ==> n2 <= v) /\
(!r v. lookup r int_beg1 = SOME v ==> n1 <= v)` by
(res_tac >> metis_tac []) >>
simp [lookup_numset_list_delete] >>
`n2 = n_in - size_of_live_tree lt'` by metis_tac [get_intervals_withlive_nout] >>
`n1 = n2 - size_of_live_tree lt` by metis_tac [get_intervals_withlive_nout] >>
`0 <= size_of_live_tree lt /\ 0 <= size_of_live_tree lt'` by rw [size_of_live_tree_positive] >>
rpt strip_tac
THEN1 (
rpt CASE_TAC >>
rpt (first_x_assum (qspec_then `r` assume_tac)) >>
rfs [] >> rw [] >>
intLib.COOPER_TAC
)
THEN1 res_tac
)
QED
Theorem get_intervals_withlive_intbeg_nout: