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author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-03-17 07:49:46 +0100 |
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committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-03-17 07:49:46 +0100 |
commit | 0ebdbc31c3e992e43d85699a039ebdd23e272df6 (patch) | |
tree | e8f5421825917bcad4dc0762f02dd28275463f5c /arm | |
parent | fac63511aaf3fd3c77db69802c24474559365879 (diff) | |
download | compcert-kvx-0ebdbc31c3e992e43d85699a039ebdd23e272df6.tar.gz compcert-kvx-0ebdbc31c3e992e43d85699a039ebdd23e272df6.zip |
DuplicateOpcodeHeuristic for ARM
Diffstat (limited to 'arm')
-rw-r--r-- | arm/DuplicateOpcodeHeuristic.ml | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/arm/DuplicateOpcodeHeuristic.ml b/arm/DuplicateOpcodeHeuristic.ml index 85505245..9b6a6409 100644 --- a/arm/DuplicateOpcodeHeuristic.ml +++ b/arm/DuplicateOpcodeHeuristic.ml @@ -1,3 +1,22 @@ -exception HeuristicSucceeded - -let opcode_heuristic code cond ifso ifnot preferred = () +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 + |