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(.module:
[library
[lux #*
[abstract
["." monad (#+ do)]]
[control
["." maybe ("#\." monad)]]
[data
[collection
["." list]]]
[math
[number
["n" nat]]]]]
[////
["." analysis (#+ Environment)]
["/" synthesis (#+ Path Abstraction Synthesis)]
[///
[arity (#+ Arity)]
["." reference
["." variable (#+ Register Variable)]]]])
(type: .public (Transform a)
(-> a (Maybe a)))
(def: .public (register_optimization offset)
(-> Register (-> Register Register))
(|>> dec (n.+ offset)))
(def: (path_optimization body_optimization offset)
(-> (Transform Synthesis) Register (Transform Path))
(function (recur path)
(case path
(#/.Bind register)
(#.Some (#/.Bind (register_optimization offset register)))
(^template [<tag>]
[(<tag> left right)
(do maybe.monad
[left' (recur left)
right' (recur right)]
(in (<tag> left' right')))])
([#/.Alt] [#/.Seq])
(#/.Bit_Fork when then else)
(do {! maybe.monad}
[then (recur then)
else (case else
(#.Some else)
(\ ! map (|>> #.Some) (recur else))
#.None
(in #.None))]
(in (#/.Bit_Fork when then else)))
(^template [<tag>]
[(<tag> [[test then] elses])
(do {! maybe.monad}
[then (recur then)
elses (monad.map ! (function (_ [else_test else_then])
(do !
[else_then (recur else_then)]
(in [else_test else_then])))
elses)]
(in (<tag> [[test then] elses])))])
([#/.I64_Fork]
[#/.F64_Fork]
[#/.Text_Fork])
(#/.Then body)
(|> body
body_optimization
(maybe\map (|>> #/.Then)))
_
(#.Some path))))
(def: (body_optimization true_loop? offset scope_environment arity expr)
(-> Bit Register (Environment Synthesis) Arity (Transform Synthesis))
(loop [return? true
expr expr]
(case expr
(#/.Primitive _)
(#.Some expr)
(#/.Structure structure)
(case structure
(#analysis.Variant variant)
(do maybe.monad
[value' (|> variant (get@ #analysis.value) (recur false))]
(in (|> variant
(set@ #analysis.value value')
/.variant)))
(#analysis.Tuple tuple)
(|> tuple
(monad.map maybe.monad (recur false))
(maybe\map (|>> /.tuple))))
(#/.Reference reference)
(case reference
(^ (#reference.Variable (variable.self)))
(if true_loop?
#.None
(#.Some expr))
(^ (reference.constant constant))
(#.Some expr)
(^ (reference.local register))
(#.Some (#/.Reference (reference.local (register_optimization offset register))))
(^ (reference.foreign register))
(if true_loop?
(list.item register scope_environment)
(#.Some expr)))
(^ (/.branch/case [input path]))
(do maybe.monad
[input' (recur false input)
path' (path_optimization (recur return?) offset path)]
(in (|> path' [input'] /.branch/case)))
(^ (/.branch/let [input register body]))
(do maybe.monad
[input' (recur false input)
body' (recur return? body)]
(in (/.branch/let [input' (register_optimization offset register) body'])))
(^ (/.branch/if [input then else]))
(do maybe.monad
[input' (recur false input)
then' (recur return? then)
else' (recur return? else)]
(in (/.branch/if [input' then' else'])))
(^ (/.branch/get [path record]))
(do maybe.monad
[record (recur false record)]
(in (/.branch/get [path record])))
(^ (/.loop/scope scope))
(do {! maybe.monad}
[inits' (|> scope
(get@ #/.inits)
(monad.map ! (recur false)))
iteration' (recur return? (get@ #/.iteration scope))]
(in (/.loop/scope {#/.start (|> scope (get@ #/.start) (register_optimization offset))
#/.inits inits'
#/.iteration iteration'})))
(^ (/.loop/recur args))
(|> args
(monad.map maybe.monad (recur false))
(maybe\map (|>> /.loop/recur)))
(^ (/.function/abstraction [environment arity body]))
(do {! maybe.monad}
[environment' (monad.map ! (recur false) environment)]
(in (/.function/abstraction [environment' arity body])))
(^ (/.function/apply [abstraction arguments]))
(do {! maybe.monad}
[arguments' (monad.map maybe.monad (recur false) arguments)]
(with_expansions [<application> (as_is (do !
[abstraction' (recur false abstraction)]
(in (/.function/apply [abstraction' arguments']))))]
(case abstraction
(^ (#/.Reference (#reference.Variable (variable.self))))
(if (and return?
(n.= arity (list.size arguments)))
(in (/.loop/recur arguments'))
(if true_loop?
#.None
<application>))
_
<application>)))
(#/.Extension [name args])
(|> args
(monad.map maybe.monad (recur false))
(maybe\map (|>> [name] #/.Extension))))))
(def: .public (optimization true_loop? offset inits functionS)
(-> Bit Register (List Synthesis) Abstraction (Maybe [Register (List Synthesis) Synthesis]))
(|> (get@ #/.body functionS)
(body_optimization true_loop? offset (get@ #/.environment functionS) (get@ #/.arity functionS))
(maybe\map (|>> [offset inits]))))
|
