Section EXPRESSIONS.
Variable cunit: Cminor.program.
Variable hf: helper_functions.
Hypothesis LINK: linkorder cunit prog.
Hypothesis HF: helper_functions_declared cunit hf.
(** If-conversion *)

Lemma classify_stmt_wt:
forall env tyret id a s,
classify_stmt s = SCassign id a ->
wt_stmt env tyret s ->
wt_expr env a (env id).