package ocaml-compiler
Official release of OCaml 5.3.0
Install
Dune Dependency
Authors
Maintainers
Sources
ocaml-5.3.0.tar.gz
sha256=22c1dd9de21bf43b62d1909041fb5fad648905227bf69550a6a6bef31e654f38
doc/compiler-libs.optcomp/Unbox_specialised_args/index.html
Module Unbox_specialised_args
When approximations of specialised arguments indicate that they are closures or blocks, add more specialised arguments corresponding to the projections from such blocks (with definitions of such projections lifted out), such that the original specialised arguments may later be eliminated.
This in particular enables elimination of closure allocations in examples such as:
let rec map f = function | -> | a::l -> let r = f a in r :: map f l
let g x = map (fun y -> x + y) 1; 2; 3; 4
Here, the specialised version of map
initially has a specialised argument f
; and upon inlining there will be a projection of x
from the closure of f
. This pass adds a new specialised argument to carry that projection, at which point the closure of f
is redundant.
val rewrite_set_of_closures :
env:Inline_and_simplify_aux.Env.t ->
duplicate_function:
(env:Inline_and_simplify_aux.Env.t ->
set_of_closures:Flambda.set_of_closures ->
fun_var:Variable.t ->
new_fun_var:Variable.t ->
Flambda.function_declaration * Flambda.specialised_to Variable.Map.t) ->
set_of_closures:Flambda.set_of_closures ->
(Flambda.expr * Inlining_cost.Benefit.t) option
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