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|
(* *************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Sylvain Boulmé Grenoble-INP, VERIMAG *)
(* David Monniaux CNRS, VERIMAG *)
(* Cyril Six Kalray *)
(* *)
(* Copyright Kalray. Copyright VERIMAG. All rights reserved. *)
(* This file is distributed under the terms of the INRIA *)
(* Non-Commercial License Agreement. *)
(* *)
(* *************************************************************)
open Op
open Integers
let opcode_heuristic code cond ifso ifnot is_loop_header =
match cond with
| Ccompimm (c, n) | Ccompuimm (c, n) -> if n == Integers.Int.zero then (match c with
| Clt | Cle -> Some false
| Cgt | Cge -> Some true
| _ -> None
) else None
| Ccompf c | Ccompfs c -> (match c with
| Ceq -> Some false
| Cne -> Some true
| _ -> None
)
| Cnotcompf c | Cnotcompfs c -> (match c with
| Ceq -> Some true
| Cne -> Some false
| _ -> None
)
| _ -> None
|
