From f3250c32ff42ae18fd03a5311c1f0caec3415aba Mon Sep 17 00:00:00 2001 From: xleroy Date: Sat, 9 Jun 2012 08:49:06 +0000 Subject: Make min_int / -1 and min_int % -1 semantically undefined git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1919 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e --- powerpc/ConstpropOp.vp | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'powerpc/ConstpropOp.vp') diff --git a/powerpc/ConstpropOp.vp b/powerpc/ConstpropOp.vp index 60b5c63..c39ccdb 100644 --- a/powerpc/ConstpropOp.vp +++ b/powerpc/ConstpropOp.vp @@ -95,8 +95,12 @@ Nondetfunction eval_static_operation (op: operation) (vl: list approx) := | Osubimm n, I n1 :: nil => I (Int.sub n n1) | 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) - | 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) | Oandimm n, I n1 :: nil => I(Int.and n1 n) | Oor, I n1 :: I n2 :: nil => I(Int.or n1 n2) -- cgit v1.2.3