diff options
Diffstat (limited to 'arm/ConstpropOp.vp')
| -rw-r--r-- | arm/ConstpropOp.vp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arm/ConstpropOp.vp b/arm/ConstpropOp.vp index c0a04f0b..0f06703c 100644 --- a/arm/ConstpropOp.vp +++ b/arm/ConstpropOp.vp @@ -112,8 +112,12 @@ Nondetfunction eval_static_operation (op: operation) (vl: list approx) := | Orsubshift s, I n1 :: I n2 :: nil => I(Int.sub (eval_static_shift s n2) n1) | Orsubimm n, I n1 :: nil => I (Int.sub n n1) | Omul, I n1 :: I n2 :: nil => I(Int.mul n1 n2) - | Odiv, I n1 :: I n2 :: nil => if Int.eq n2 Int.zero then Unknown else I(Int.divs n1 n2) - | Odivu, I n1 :: I n2 :: nil => if Int.eq n2 Int.zero then Unknown else I(Int.divu n1 n2) + | Odiv, I n1 :: I n2 :: nil => + if Int.eq n2 Int.zero then Unknown else + if Int.eq n1 (Int.repr Int.min_signed) && Int.eq n2 Int.mone then Unknown + else I(Int.divs n1 n2) + | Odivu, I n1 :: I n2 :: nil => + if Int.eq n2 Int.zero then Unknown else I(Int.divu n1 n2) | Oand, I n1 :: I n2 :: nil => I(Int.and n1 n2) | Oandshift s, I n1 :: I n2 :: nil => I(Int.and n1 (eval_static_shift s n2)) | Oandimm n, I n1 :: nil => I(Int.and n1 n) |