Section PRESERVATION.
Variable prog: program.
Variable tprog: program.
Hypothesis TRANSF: match_prog prog tprog.
Let ge := Genv.globalenv prog.
Let tge := Genv.globalenv tprog.
Proof (Genv.find_symbol_match TRANSF).
Proof (Genv.senv_match TRANSF).
Proof (Genv.find_funct_match TRANSF).
Proof (Genv.find_funct_ptr_match TRANSF).
Definition vanalyze (cu: program) (f: function) :=
ValueAnalysis.analyze (romem_for cu) f.

Lemma is_dead_sound_1:
forall nv, is_dead nv = true -> nv = Nothing.