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 --- cfrontend/Cminorgenproof.v | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'cfrontend/Cminorgenproof.v') diff --git a/cfrontend/Cminorgenproof.v b/cfrontend/Cminorgenproof.v index f725662..9de6b32 100644 --- a/cfrontend/Cminorgenproof.v +++ b/cfrontend/Cminorgenproof.v @@ -1459,11 +1459,13 @@ Proof. rewrite zeq_true. rewrite Int.sub_shifted. auto. inv H; inv H0; inv H1; TrivialExists. inv H0; try discriminate; inv H1; try discriminate. simpl in *. - destruct (Int.eq i0 Int.zero); inv H. TrivialExists. + destruct (Int.eq i0 Int.zero + || Int.eq i (Int.repr Int.min_signed) && Int.eq i0 Int.mone); inv H; TrivialExists. inv H0; try discriminate; inv H1; try discriminate. simpl in *. destruct (Int.eq i0 Int.zero); inv H. TrivialExists. inv H0; try discriminate; inv H1; try discriminate. simpl in *. - destruct (Int.eq i0 Int.zero); inv H. TrivialExists. + destruct (Int.eq i0 Int.zero + || Int.eq i (Int.repr Int.min_signed) && Int.eq i0 Int.mone); inv H; TrivialExists. inv H0; try discriminate; inv H1; try discriminate. simpl in *. destruct (Int.eq i0 Int.zero); inv H. TrivialExists. inv H; inv H0; inv H1; TrivialExists. -- cgit v1.2.3