108 lines
5.3 KiB
OCaml
108 lines
5.3 KiB
OCaml
(***********************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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(* Selection of pseudo-instructions, assignment of pseudo-registers,
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sequentialization. *)
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type environment = (Ident.t, Reg.t array) Tbl.t
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val size_expr : environment -> Cmm.expression -> int
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class virtual selector_generic : object
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(* The following methods must or can be overridden by the processor
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description *)
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method virtual is_immediate : int -> bool
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(* Must be defined to indicate whether a constant is a suitable
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immediate operand to arithmetic instructions *)
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method virtual select_addressing :
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Cmm.memory_chunk -> Cmm.expression -> Arch.addressing_mode * Cmm.expression
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(* Must be defined to select addressing modes *)
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method is_simple_expr: Cmm.expression -> bool
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(* Can be overridden to reflect special extcalls known to be pure *)
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method select_operation :
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Cmm.operation ->
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Cmm.expression list -> Mach.operation * Cmm.expression list
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(* Can be overridden to deal with special arithmetic instructions *)
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method select_condition : Cmm.expression -> Mach.test * Cmm.expression
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(* Can be overridden to deal with special test instructions *)
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method select_store :
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bool -> Arch.addressing_mode -> Cmm.expression ->
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Mach.operation * Cmm.expression
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(* Can be overridden to deal with special store constant instructions *)
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method regs_for : Cmm.machtype -> Reg.t array
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(* Return an array of fresh registers of the given type.
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Default implementation is like Reg.createv.
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Can be overridden if float values are stored as pairs of
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integer registers. *)
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method insert_op :
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Mach.operation -> Reg.t array -> Reg.t array -> Reg.t array
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(* Can be overridden to deal with 2-address instructions
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or instructions with hardwired input/output registers *)
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method insert_op_debug :
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Mach.operation -> Debuginfo.t -> Reg.t array -> Reg.t array -> Reg.t array
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(* Can be overridden to deal with 2-address instructions
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or instructions with hardwired input/output registers *)
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method emit_extcall_args :
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environment -> Cmm.expression list -> Reg.t array * int
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(* Can be overridden to deal with stack-based calling conventions *)
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method emit_stores :
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environment -> Cmm.expression list -> Reg.t array -> unit
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(* Fill a freshly allocated block. Can be overridden for architectures
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that do not provide Arch.offset_addressing. *)
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method mark_call : unit
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(* informs the code emitter that the current function is non-leaf:
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it may perform a (non-tail) call; by default, sets
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[Proc.contains_calls := true] *)
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method mark_tailcall : unit
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(* informs the code emitter that the current function may end with
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a tail-call; by default, does nothing *)
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method mark_c_tailcall : unit
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(* informs the code emitter that the current function may call
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a C function that never returns; by default, does nothing.
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It is unecessary to save the stack pointer in this situation
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(which is the main purpose of tracking leaf functions) but some
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architectures still need to ensure that the stack is properly
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aligned when the C function is called. This is achieved by
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overloading this method to set [Proc.contains_calls := true] *)
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method mark_instr : Mach.instruction_desc -> unit
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(* dispatches on instructions to call one of the marking function
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above; overloading this is useful if Ispecific instructions need
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marking *)
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(* The following method is the entry point and should not be overridden *)
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method emit_fundecl : Cmm.fundecl -> Mach.fundecl
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(* The following methods should not be overridden. They cannot be
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declared "private" in the current implementation because they
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are not always applied to "self", but ideally they should be private. *)
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method extract : Mach.instruction
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method insert : Mach.instruction_desc -> Reg.t array -> Reg.t array -> unit
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method insert_debug : Mach.instruction_desc -> Debuginfo.t ->
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Reg.t array -> Reg.t array -> unit
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method insert_move : Reg.t -> Reg.t -> unit
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method insert_move_args : Reg.t array -> Reg.t array -> int -> unit
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method insert_move_results : Reg.t array -> Reg.t array -> int -> unit
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method insert_moves : Reg.t array -> Reg.t array -> unit
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method adjust_type : Reg.t -> Reg.t -> unit
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method adjust_types : Reg.t array -> Reg.t array -> unit
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method emit_expr :
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(Ident.t, Reg.t array) Tbl.t -> Cmm.expression -> Reg.t array option
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method emit_tail : (Ident.t, Reg.t array) Tbl.t -> Cmm.expression -> unit
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end
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val reset : unit -> unit
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