diff options
Diffstat (limited to 'backend/Unusedglobproof.v')
| -rw-r--r-- | backend/Unusedglobproof.v | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/backend/Unusedglobproof.v b/backend/Unusedglobproof.v index fec3c9f8..476208b0 100644 --- a/backend/Unusedglobproof.v +++ b/backend/Unusedglobproof.v @@ -428,9 +428,9 @@ Qed. End TRANSFORMATION. Theorem transf_program_match: - forall p tp, transform_program p = OK tp -> match_prog p tp. + forall p tp, transf_program p = OK tp -> match_prog p tp. Proof. - unfold transform_program; intros p tp TR. set (pm := prog_defmap p) in *. + unfold transf_program; intros p tp TR. set (pm := prog_defmap p) in *. destruct (used_globals p pm) as [u|] eqn:U; try discriminate. destruct (IS.for_all (global_defined p pm) u) eqn:DEF; inv TR. exists u; split. @@ -915,7 +915,7 @@ Proof. /\ Val.inject j a ta). { apply eval_addressing_inj with (ge1 := ge) (sp1 := Vptr sp0 Ptrofs.zero) (vl1 := rs##args). intros. apply symbol_address_inject. eapply match_stacks_preserves_globals; eauto. - apply KEPT. red. exists pc, (Iload chunk addr args dst pc'); auto. + apply KEPT. red. exists pc, (Iload trap chunk addr args dst pc'); auto. econstructor; eauto. apply regs_inject; auto. assumption. } @@ -924,6 +924,36 @@ Proof. econstructor; split. eapply exec_Iload; eauto. econstructor; eauto. apply set_reg_inject; auto. +- (* load notrap1 *) + assert (eval_addressing tge (Vptr tsp Ptrofs.zero) addr trs##args = None). + { eapply eval_addressing_inj_none. + intros. apply symbol_address_inject. eapply match_stacks_preserves_globals; eauto. + apply KEPT. red. exists pc, (Iload NOTRAP chunk addr args dst pc'); auto. + econstructor; eauto. + rewrite Ptrofs.add_zero; reflexivity. + apply regs_inject; auto. + eassumption. + assumption. } + + econstructor; split. eapply exec_Iload_notrap1; eauto. + econstructor; eauto. apply set_reg_inject; auto. + +- (* load notrap2 *) + assert (A: exists ta, + eval_addressing tge (Vptr tsp Ptrofs.zero) addr trs##args = Some ta + /\ Val.inject j a ta). + { apply eval_addressing_inj with (ge1 := ge) (sp1 := Vptr sp0 Ptrofs.zero) (vl1 := rs##args). + intros. apply symbol_address_inject. eapply match_stacks_preserves_globals; eauto. + apply KEPT. red. exists pc, (Iload NOTRAP chunk addr args dst pc'); auto. + econstructor; eauto. + apply regs_inject; auto. + assumption. } + destruct A as (ta & B & C). + destruct (Mem.loadv chunk tm ta) eqn:Echunk2. + + econstructor; split. eapply exec_Iload; eauto. + econstructor; eauto. apply set_reg_inject; auto. + + econstructor; split. eapply exec_Iload_notrap2; eauto. + econstructor; eauto. apply set_reg_inject; auto. - (* store *) assert (A: exists ta, eval_addressing tge (Vptr tsp Ptrofs.zero) addr trs##args = Some ta |