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| author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-06-09 08:49:06 +0000 |
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| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-06-09 08:49:06 +0000 |
| commit | f3250c32ff42ae18fd03a5311c1f0caec3415aba (patch) | |
| tree | b37da52bcf8015c4b29bb8387c30727e2b4de824 /ia32/ConstpropOpproof.v | |
| parent | 326d33e5b0f9dc0d3ccf6d75c62fedbc3ca085e5 (diff) | |
| download | compcert-f3250c32ff42ae18fd03a5311c1f0caec3415aba.tar.gz compcert-f3250c32ff42ae18fd03a5311c1f0caec3415aba.zip | |
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
Diffstat (limited to 'ia32/ConstpropOpproof.v')
| -rw-r--r-- | ia32/ConstpropOpproof.v | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/ia32/ConstpropOpproof.v b/ia32/ConstpropOpproof.v index 1612bf69..ca38f6b8 100644 --- a/ia32/ConstpropOpproof.v +++ b/ia32/ConstpropOpproof.v @@ -143,9 +143,11 @@ Proof. InvVLMA; simpl in *; FuncInv; try subst v; auto. destruct (propagate_float_constants tt); simpl; auto. rewrite Int.sub_add_opp. rewrite shift_symbol_address. rewrite Val.sub_add_opp. auto. + destruct (Int.eq n2 Int.zero). inv H0. + destruct (Int.eq n1 (Int.repr Int.min_signed) && Int.eq n2 Int.mone); inv H0; simpl; auto. destruct (Int.eq n2 Int.zero); inv H0; simpl; auto. - destruct (Int.eq n2 Int.zero); inv H0; simpl; auto. - destruct (Int.eq n2 Int.zero); inv H0; simpl; auto. + destruct (Int.eq n2 Int.zero). inv H0. + destruct (Int.eq n1 (Int.repr Int.min_signed) && Int.eq n2 Int.mone); inv H0; simpl; auto. destruct (Int.eq n2 Int.zero); inv H0; simpl; auto. destruct (Int.ltu n2 Int.iwordsize); simpl; auto. destruct (Int.ltu n Int.iwordsize); simpl; auto. |