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| 1 | (**************************************************************************) |
| 2 | (* *) |
| 3 | (* OCaml *) |
| 4 | (* *) |
| 5 | (* Pierre Chambart, OCamlPro *) |
| 6 | (* Mark Shinwell and Leo White, Jane Street Europe *) |
| 7 | (* *) |
| 8 | (* Copyright 2013--2016 OCamlPro SAS *) |
| 9 | (* Copyright 2014--2016 Jane Street Group LLC *) |
| 10 | (* *) |
| 11 | (* All rights reserved. This file is distributed under the terms of *) |
| 12 | (* the GNU Lesser General Public License version 2.1, with the *) |
| 13 | (* special exception on linking described in the file LICENSE. *) |
| 14 | (* *) |
| 15 | (**************************************************************************) |
| 16 | |
| 17 | [@@@ocaml.warning "+a-4-9-30-40-41-42"] |
| 18 | |
| 19 | (** Knowledge that the middle end needs about the backend. *) |
| 20 | |
| 21 | module type S = sig |
| 22 | (** Compute the symbol for the given identifier. *) |
| 23 | val symbol_for_global' : (Ident.t -> Symbol.t) |
| 24 | |
| 25 | (** If the given approximation is that of a symbol (Value_symbol) or an |
| 26 | external (Value_extern), attempt to find a more informative |
| 27 | approximation from a previously-written compilation artifact. In the |
| 28 | native code backend, for example, this might consult a .cmx file. *) |
| 29 | val really_import_approx : Simple_value_approx.t -> Simple_value_approx.t |
| 30 | |
| 31 | val import_symbol : Symbol.t -> Simple_value_approx.t |
| 32 | |
| 33 | val closure_symbol : Closure_id.t -> Symbol.t |
| 34 | |
| 35 | (** The natural size of an integer on the target architecture |
| 36 | (cf. [Arch.size_int] in the native code backend). *) |
| 37 | val size_int : int |
| 38 | |
| 39 | (** [true] iff the target architecture is big endian. *) |
| 40 | val big_endian : bool |
| 41 | |
| 42 | (** The maximum number of arguments that is reasonable for a function |
| 43 | to have. This should be fewer than the threshold that causes non-self |
| 44 | tail call optimization to be inhibited (in particular, if it would |
| 45 | entail passing arguments on the stack; see [Selectgen]). *) |
| 46 | val max_sensible_number_of_arguments : int |
| 47 | end |
| 48 |