diff options
Diffstat (limited to 'ia32/ConstpropOp.vp')
| -rw-r--r-- | ia32/ConstpropOp.vp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/ia32/ConstpropOp.vp b/ia32/ConstpropOp.vp index b95ad669..a5e4e0d2 100644 --- a/ia32/ConstpropOp.vp +++ b/ia32/ConstpropOp.vp @@ -107,9 +107,15 @@ Nondetfunction eval_static_operation (op: operation) (vl: list approx) := | Osub, G s1 n1 :: I n2 :: nil => G s1 (Int.sub n1 n2) | Omul, I n1 :: I n2 :: nil => I(Int.mul n1 n2) | Omulimm n, I n1 :: nil => I(Int.mul n1 n) - | Odiv, I n1 :: I n2 :: nil => if Int.eq n2 Int.zero then Unknown else I(Int.divs 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) - | Omod, I n1 :: I n2 :: nil => if Int.eq n2 Int.zero then Unknown else I(Int.mods n1 n2) + | Omod, 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.mods n1 n2) | Omodu, I n1 :: I n2 :: nil => if Int.eq n2 Int.zero then Unknown else I(Int.modu n1 n2) | Oand, I n1 :: I n2 :: nil => I(Int.and n1 n2) | Oandimm n, I n1 :: nil => I(Int.and n1 n) |