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Maximilien COLANGE
tiamo
Commits
a0eda0df
Commit
a0eda0df
authored
Apr 06, 2016
by
Maximilien Colange
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Optimize LU bounds computation.
parent
832da45c
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1
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src/uppaalta.ml
src/uppaalta.ml
+17
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src/uppaalta.ml
View file @
a0eda0df
...
...
@@ 607,24 +607,6 @@ struct
(********** LOADING FUNCTIONS **********)
(** given a set of expressions, simplify it to retain only its maximal
* constant and all nonconstant *)
(* TODO check that the input does not contain ConstVariable or constant ConstArray *)
let
simplify_max
exprs
=
let
new_max
=
function

None
>
(
function

Constant
k
>
Some
k

_
>
None
)

Some
m
as
e
>
(
function

Constant
k
when
k
>
m
>
Some
k

_
>
e
)
in
match
List
.
fold_left
new_max
None
exprs
with

None
>
exprs

Some
k
>
List
.
filter
(
function

Constant
l
when
l
<
k
>
false

_
>
true
)
exprs
(* given a process, a location l and a clock c, compute the set of expressions
* against which c is compared from l until it is reset.
* Formally, the result S is the smallest set of expressions such that:
...
...
@@ 645,39 +627,29 @@ struct
let
n
=
VarContext
.
size
ta
.
clocks
in
let
lb
,
ub
=
Array
.
make
n
0
,
Array
.
make
n
0
in
let
eval
=
eval_exp
ta
state
.
stateVars
in
for
cl
=
0
to
n

1
do
let
lexpr
,
uexpr
=
Array
.
fold_left
(
fun
(
lacc
,
uacc
)
loc
>
for
cl
=
1
to
n

1
do
Array
.
iter
(
fun
loc
>
let
ltmp
,
utmp
=
loc
.
compExpr
.
(
cl
)
in
(
lacc
@
ltmp
,
uacc
@
utmp
))
([]
,
[]
)
(* instantiate found expressions, and retain only the maximal constant *)
List
.
iter
(
fun
e
>
match
eval
e
with

Constant
k
when
k
>
lb
.
(
cl
)
>
lb
.
(
cl
)
<
k

Constant
_
>
()

_
>
failwith
"expression does not evaluate to constant"
)
ltmp
;
List
.
iter
(
fun
e
>
match
eval
e
with

Constant
k
when
k
>
ub
.
(
cl
)
>
ub
.
(
cl
)
<
k

Constant
_
>
()

_
>
failwith
"expression does not evaluate to constant"
)
utmp
)
state
.
stateLocs
in
(* instantiate found expressions, and retain only the maximal constant *)
let
lcst
,
ucst
=
simplify_max
(
List
.
map
eval
lexpr
)
,
simplify_max
(
List
.
map
eval
uexpr
)
in
begin
match
lcst
with

(
Constant
k
)
::_
>
lb
.
(
cl
)
<
max
lb
.
(
cl
)
k

_
>
(* TODO can it happen? *)
()
end
;
begin
match
ucst
with

(
Constant
k
)
::_
>
ub
.
(
cl
)
<
max
ub
.
(
cl
)
k

_
>
(* TODO can it happen? *)
()
end
;
done
;
lb
,
ub
let
lubounds
ta
state
=
try
DSHashtbl
.
find
ta
.
lubounds_tbl
state
with

Not_found
>
let
res
=
_lubounds
ta
state
in
DSHashtbl
.
add
ta
.
lubounds_tbl
state
res
;
res
_lubounds
ta
state
(* tells whether a given clock is set by a given update *)
(* the difficult part is when the lhs of the update is an array cell *)
...
...
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