Local Open Scope logic.
Hint Resolve isptr_force_val_sem_cast_neutral : norm.
Arguments denote_tc_isptr v / .
Arguments denote_tc_iszero !v .
Arguments denote_tc_nonzero !v .
Arguments denote_tc_igt i !v .
Arguments denote_tc_Zge z !v .
Arguments denote_tc_Zle z !v .
Arguments denote_tc_samebase !v1 !v2 .
Arguments denote_tc_nodivover !v1 !v2 .
Arguments denote_tc_initialized id ty rho / .
Arguments denote_tc_nosignedover op v1 v2 / .
Ltac simpl_denote_tc :=
simpl denote_tc_isptr;
simpl denote_tc_iszero;
simpl denote_tc_nonzero;
simpl denote_tc_igt;
simpl denote_tc_Zge;
simpl denote_tc_Zle;
simpl denote_tc_samebase;
simpl denote_tc_nodivover;
simpl denote_tc_initialized;
simpl denote_tc_nosignedover.

Lemma valid_pointer_null:
forall P, P |-- valid_pointer nullval.