Module IR.HilExp

module F = Stdlib.Format
module Access : sig ... end
type t =
| AccessExpression of access_expression

access path (e.g., x.f.g or xi)

| UnaryOperator of Unop.t * t * Typ.t option

Unary operator with type of the result if known

| BinaryOperator of Binop.t * t * t

Binary operator

| Exception of t

Exception

| Closure of Procname.t * (AccessPath.base * t) list

Name of function + environment

| Constant of Const.t

Constants

| Cast of Typ.t * t

Type cast

| Sizeof of Typ.t * t option

C-style sizeof(), and also used to treate a type as an expression. Refer to Exp module for canonical documentation

and access_expression = private
| Base of AccessPath.base
| FieldOffset of access_expression * Fieldname.t

field access

| ArrayOffset of access_expression * Typ.t * t option

array access

| AddressOf of access_expression

"address of" operator &

| Dereference of access_expression

"dereference" operator *

val compare : t -> t -> int
val compare_access_expression : access_expression -> access_expression -> int
module AccessExpression : sig ... end
val pp : F.formatter -> t -> unit
val get_typ : Tenv.t -> t -> Typ.t option

Get the type of the expression. Warning: not fully implemented

val of_sil : include_array_indexes:bool -> f_resolve_id:(Var.t -> AccessExpression.t option) -> add_deref:bool -> Exp.t -> Typ.t -> t

Convert SIL expression to HIL expression

val get_access_exprs : t -> AccessExpression.t list

Get all the access paths used in the given HIL expression, including duplicates if a path is used more than once.

val is_null_literal : t -> bool
val is_int_zero : t -> bool
val eval : t -> Const.t option
val eval_boolean_exp : AccessExpression.t -> t -> bool option

eval_boolean_exp var exp returns Some bool_value if the given boolean expression exp evaluates to bool_value when var is set to true. Return None if it has free variables that stop us from evaluating it, or is not a boolean expression.

val ignore_cast : t -> t
val access_expr_of_exp : include_array_indexes:bool -> f_resolve_id:(Var.t -> AccessExpression.t option) -> Exp.t -> Typ.t -> access_expression option

best effort translating a SIL expression to an access path, not semantics preserving in particular in the presence of pointer arithmetic