From ad8c37d0ebb36cb2e54baeacf5a4c7ff145b1a99 Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Mon, 3 Nov 2014 17:40:22 +0100 Subject: Add Genv.public_symbol operation. Restrict pointer event values to public global names. Update proofs accordingly. PowerPC and ARM need updating. --- backend/CSEproof.v | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'backend/CSEproof.v') diff --git a/backend/CSEproof.v b/backend/CSEproof.v index af138f83..ae8052be 100644 --- a/backend/CSEproof.v +++ b/backend/CSEproof.v @@ -818,6 +818,10 @@ Lemma symbols_preserved: forall (s: ident), Genv.find_symbol tge s = Genv.find_symbol ge s. Proof (Genv.find_symbol_transf_partial (transf_fundef rm) prog TRANSF). +Lemma public_preserved: + forall (s: ident), Genv.public_symbol tge s = Genv.public_symbol ge s. +Proof (Genv.public_symbol_transf_partial (transf_fundef rm) prog TRANSF). + Lemma varinfo_preserved: forall b, Genv.find_var_info tge b = Genv.find_var_info ge b. Proof (Genv.find_var_info_transf_partial (transf_fundef rm) prog TRANSF). @@ -1104,7 +1108,7 @@ Proof. econstructor; split. eapply exec_Ibuiltin; eauto. eapply external_call_symbols_preserved; eauto. - exact symbols_preserved. exact varinfo_preserved. + exact symbols_preserved. exact public_preserved. exact varinfo_preserved. econstructor; eauto. eapply analysis_correct_1; eauto. simpl; auto. * unfold transfer; rewrite H. @@ -1188,7 +1192,7 @@ Proof. econstructor; split. eapply exec_function_external; eauto. eapply external_call_symbols_preserved; eauto. - exact symbols_preserved. exact varinfo_preserved. + exact symbols_preserved. exact public_preserved. exact varinfo_preserved. econstructor; eauto. - (* return *) @@ -1227,7 +1231,7 @@ Theorem transf_program_correct: Proof. eapply forward_simulation_step with (match_states := fun s1 s2 => sound_state prog s1 /\ match_states s1 s2). -- eexact symbols_preserved. +- eexact public_preserved. - intros. exploit transf_initial_states; eauto. intros [s2 [A B]]. exists s2. split. auto. split. apply sound_initial; auto. auto. - intros. destruct H. eapply transf_final_states; eauto. -- cgit