From 62316a8e94d8cdcbf9e7aeadd1caf8e29507e6b0 Mon Sep 17 00:00:00 2001 From: xleroy Date: Fri, 24 Feb 2012 16:43:38 +0000 Subject: Take advantage of Cmaskzero and Cmasknotzero. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1825 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e --- powerpc/SelectOpproof.v | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'powerpc/SelectOpproof.v') diff --git a/powerpc/SelectOpproof.v b/powerpc/SelectOpproof.v index 39205dbd..1d35d9f8 100644 --- a/powerpc/SelectOpproof.v +++ b/powerpc/SelectOpproof.v @@ -817,5 +817,28 @@ Proof. rewrite Int.add_zero. auto. Qed. +Theorem eval_cond_of_expr: + forall le a v b, + eval_expr ge sp e m le a v -> + Val.bool_of_val v b -> + match cond_of_expr a with (cond, args) => + exists vl, + eval_exprlist ge sp e m le args vl /\ + eval_condition cond vl m = Some b + end. +Proof. + intros until v. unfold cond_of_expr; case (cond_of_expr_match a); intros; InvEval. + subst v. exists (v1 :: nil); split; auto with evalexpr. + simpl. destruct b. + generalize (Val.bool_of_true_val2 _ H0); clear H0; intro ISTRUE. + destruct v1; simpl in ISTRUE; try contradiction. + rewrite Int.eq_false; auto. + generalize (Val.bool_of_false_val2 _ H0); clear H0; intro ISFALSE. + destruct v1; simpl in ISFALSE; try contradiction. + rewrite ISFALSE. rewrite Int.eq_true; auto. + exists (v :: nil); split; auto with evalexpr. + simpl. inversion H0; simpl. rewrite Int.eq_false; auto. auto. auto. +Qed. + End CMCONSTR. -- cgit