diff options
Diffstat (limited to 'arm/DuplicateOpcodeHeuristic.ml')
| -rw-r--r-- | arm/DuplicateOpcodeHeuristic.ml | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arm/DuplicateOpcodeHeuristic.ml b/arm/DuplicateOpcodeHeuristic.ml new file mode 100644 index 00000000..41996028 --- /dev/null +++ b/arm/DuplicateOpcodeHeuristic.ml @@ -0,0 +1,36 @@ +(* *************************************************************) +(* *) +(* 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 + |