Introduce the type Cmm.exttype to precisely describe arguments to
external C functions, especially unboxed numerical arguments.
Annotate Cmm.Cextcall with the types of the arguments (Cmm.exttype list).
An empty list means "all arguments have default type XInt".
Annotate Mach.Iextcall with the type of the result (Cmm.machtype)
and the types of the arguments (Cmm.exttype list).
Change (slightly) the API for describing calling conventions in Proc:
- loc_external_arguments now takes a Cmm.exttype list,
in order to know more precisely the types of the arguments.
- loc_arguments, loc_parameters, loc_results, loc_external_results
now take a Cmm.machype instead of an array of pseudoregisters.
(Only the types of the pseudoregisters mattered anyway.)
Update the implementations of module Proc accordingly, in every port.
Introduce a new overridable method in Selectgen, insert_move_extcall_arg,
to produce the code that moves an argument of an external C function
to the locations returned by Proc.loc_external_arguments.
Revise the selection of external calls accordingly
(method emit_extcall_args in Selectgen).
Technically: when a C-- let-bound variable is assigned to, update its type
so that it is the lub of the types of the initial value and all values
assigned to it, with the type ordering Int <: Addr.
git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15078 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Selectgen: new methods regs_for, enables ports to store float values
in pairs of integer registers.
git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@9210 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Xavier Leroy
Stephen Dolan
Mark Shinwell
Damien Doligez
Xavier Leroy
Mark Shinwell
Damien Doligez
Jérôme Vouillon