135 lines
4.1 KiB
OCaml
135 lines
4.1 KiB
OCaml
(**************************************************************************)
|
|
(* *)
|
|
(* OCaml *)
|
|
(* *)
|
|
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
|
|
(* *)
|
|
(* Copyright 1996 Institut National de Recherche en Informatique et *)
|
|
(* en Automatique. *)
|
|
(* *)
|
|
(* All rights reserved. This file is distributed under the terms of *)
|
|
(* the GNU Lesser General Public License version 2.1, with the *)
|
|
(* special exception on linking described in the file LICENSE. *)
|
|
(* *)
|
|
(**************************************************************************)
|
|
|
|
(* Representation of machine code by sequences of pseudoinstructions *)
|
|
|
|
type integer_comparison =
|
|
Isigned of Cmm.comparison
|
|
| Iunsigned of Cmm.comparison
|
|
|
|
type integer_operation =
|
|
Iadd | Isub | Imul | Imulh | Idiv | Imod
|
|
| Iand | Ior | Ixor | Ilsl | Ilsr | Iasr
|
|
| Icomp of integer_comparison
|
|
| Icheckbound
|
|
|
|
type test =
|
|
Itruetest
|
|
| Ifalsetest
|
|
| Iinttest of integer_comparison
|
|
| Iinttest_imm of integer_comparison * int
|
|
| Ifloattest of Cmm.comparison * bool
|
|
| Ioddtest
|
|
| Ieventest
|
|
|
|
type operation =
|
|
Imove
|
|
| Ispill
|
|
| Ireload
|
|
| Iconst_int of nativeint
|
|
| Iconst_float of int64
|
|
| Iconst_symbol of string
|
|
| Iconst_blockheader of nativeint
|
|
| Icall_ind
|
|
| Icall_imm of string
|
|
| Itailcall_ind
|
|
| Itailcall_imm of string
|
|
| Iextcall of string * bool
|
|
| Istackoffset of int
|
|
| Iload of Cmm.memory_chunk * Arch.addressing_mode
|
|
| Istore of Cmm.memory_chunk * Arch.addressing_mode * bool
|
|
| Ialloc of int
|
|
| Iintop of integer_operation
|
|
| Iintop_imm of integer_operation * int
|
|
| Inegf | Iabsf | Iaddf | Isubf | Imulf | Idivf
|
|
| Ifloatofint | Iintoffloat
|
|
| Ispecific of Arch.specific_operation
|
|
|
|
type instruction =
|
|
{ desc: instruction_desc;
|
|
next: instruction;
|
|
arg: Reg.t array;
|
|
res: Reg.t array;
|
|
dbg: Debuginfo.t;
|
|
mutable live: Reg.Set.t }
|
|
|
|
and instruction_desc =
|
|
Iend
|
|
| Iop of operation
|
|
| Ireturn
|
|
| Iifthenelse of test * instruction * instruction
|
|
| Iswitch of int array * instruction array
|
|
| Iloop of instruction
|
|
| Icatch of int * instruction * instruction
|
|
| Iexit of int
|
|
| Itrywith of instruction * instruction
|
|
| Iraise of Lambda.raise_kind
|
|
|
|
type fundecl =
|
|
{ fun_name: string;
|
|
fun_args: Reg.t array;
|
|
fun_body: instruction;
|
|
fun_fast: bool;
|
|
fun_dbg : Debuginfo.t }
|
|
|
|
let rec dummy_instr =
|
|
{ desc = Iend;
|
|
next = dummy_instr;
|
|
arg = [||];
|
|
res = [||];
|
|
dbg = Debuginfo.none;
|
|
live = Reg.Set.empty }
|
|
|
|
let end_instr () =
|
|
{ desc = Iend;
|
|
next = dummy_instr;
|
|
arg = [||];
|
|
res = [||];
|
|
dbg = Debuginfo.none;
|
|
live = Reg.Set.empty }
|
|
|
|
let instr_cons d a r n =
|
|
{ desc = d; next = n; arg = a; res = r;
|
|
dbg = Debuginfo.none; live = Reg.Set.empty }
|
|
|
|
let instr_cons_debug d a r dbg n =
|
|
{ desc = d; next = n; arg = a; res = r; dbg = dbg; live = Reg.Set.empty }
|
|
|
|
let rec instr_iter f i =
|
|
match i.desc with
|
|
Iend -> ()
|
|
| _ ->
|
|
f i;
|
|
match i.desc with
|
|
Iend -> ()
|
|
| Ireturn | Iop(Itailcall_ind) | Iop(Itailcall_imm _) -> ()
|
|
| Iifthenelse(tst, ifso, ifnot) ->
|
|
instr_iter f ifso; instr_iter f ifnot; instr_iter f i.next
|
|
| Iswitch(index, cases) ->
|
|
for i = 0 to Array.length cases - 1 do
|
|
instr_iter f cases.(i)
|
|
done;
|
|
instr_iter f i.next
|
|
| Iloop(body) ->
|
|
instr_iter f body; instr_iter f i.next
|
|
| Icatch(_, body, handler) ->
|
|
instr_iter f body; instr_iter f handler; instr_iter f i.next
|
|
| Iexit _ -> ()
|
|
| Itrywith(body, handler) ->
|
|
instr_iter f body; instr_iter f handler; instr_iter f i.next
|
|
| Iraise _ -> ()
|
|
| _ ->
|
|
instr_iter f i.next
|