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mach.mli
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mach.mli
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(**************************************************************************)
(* *)
(* 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.integer_comparison
| Iunsigned of Cmm.integer_comparison
type integer_operation =
Iadd | Isub | Imul | Imulh | Idiv | Imod
| Iand | Ior | Ixor | Ilsl | Ilsr | Iasr
| Icomp of integer_comparison
| Icheckbound
type float_comparison = Cmm.float_comparison
type test =
Itruetest
| Ifalsetest
| Iinttest of integer_comparison
| Iinttest_imm of integer_comparison * int
| Ifloattest of float_comparison
| Ioddtest
| Ieventest
type operation =
Imove
| Ispill
| Ireload
| Iconst_int of nativeint
| Iconst_float of int64
| Iconst_symbol of string
| Icall_ind
| Icall_imm of { func : string; }
| Itailcall_ind
| Itailcall_imm of { func : string; }
| Iextcall of { func : string;
ty_res : Cmm.machtype; ty_args : Cmm.exttype list;
alloc : bool;
stack_ofs : int; }
| Istackoffset of int
| Iload of { memory_chunk : Cmm.memory_chunk;
addressing_mode : Arch.addressing_mode;
mutability : Asttypes.mutable_flag;
is_atomic : bool }
| Istore of Cmm.memory_chunk * Arch.addressing_mode * bool
(* false = initialization, true = assignment *)
| Ialloc of { bytes : int; dbginfo : Debuginfo.alloc_dbginfo; }
| Iintop of integer_operation
| Iintop_imm of integer_operation * int
| Icompf of float_comparison
| Inegf | Iabsf | Iaddf | Isubf | Imulf | Idivf
| Ifloatofint | Iintoffloat
| Iopaque
| Ispecific of Arch.specific_operation
| Ipoll of { return_label: Cmm.label option }
| Idls_get
| Ireturn_addr (** Retrieve the return address from the stack frame *)
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
| Icatch of Cmm.rec_flag * (int * instruction) list * 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_codegen_options : Cmm.codegen_option list;
fun_dbg : Debuginfo.t;
fun_poll: Lambda.poll_attribute;
fun_num_stack_slots: int array;
fun_contains_calls: bool;
}
val dummy_instr: instruction
val end_instr: unit -> instruction
val instr_cons:
instruction_desc -> Reg.t array -> Reg.t array -> instruction ->
instruction
val instr_cons_debug:
instruction_desc -> Reg.t array -> Reg.t array -> Debuginfo.t ->
instruction -> instruction
val instr_iter: (instruction -> unit) -> instruction -> unit
val operation_is_pure : operation -> bool
(** Returns [true] if the given operation only produces a result
in its destination registers, but has no side effects whatsoever:
it doesn't raise exceptions, it doesn't modify already-allocated
blocks, it doesn't adjust the stack frame, etc. *)
val operation_can_raise : operation -> bool
(** Returns [true] if the given operation can raise an exception. *)