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Var-info

Var-info-fix

Fixing function for var-info structures.

Signature
(var-info-fix x) → new-x
Arguments: x — Guard (var-infop x).
Returns: new-x — Type (var-infop new-x).

Definitions and Theorems

Function: var-info-fix$inline

(defun var-info-fix$inline (x)
  (declare (xargs :guard (var-infop x)))
  (let ((__function__ 'var-info-fix))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((type (type-fix (cdr (std::da-nth 0 x))))
              (linkage (linkage-fix (cdr (std::da-nth 1 x)))))
           (list (cons 'type type)
                 (cons 'linkage linkage)))
         :exec x)))

Theorem: var-infop-of-var-info-fix

(defthm var-infop-of-var-info-fix
  (b* ((new-x (var-info-fix$inline x)))
    (var-infop new-x))
  :rule-classes :rewrite)

Theorem: var-info-fix-when-var-infop

(defthm var-info-fix-when-var-infop
  (implies (var-infop x)
           (equal (var-info-fix x) x)))

Function: var-info-equiv$inline

(defun var-info-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (var-infop acl2::x)
                              (var-infop acl2::y))))
  (equal (var-info-fix acl2::x)
         (var-info-fix acl2::y)))

Theorem: var-info-equiv-is-an-equivalence

(defthm var-info-equiv-is-an-equivalence
  (and (booleanp (var-info-equiv x y))
       (var-info-equiv x x)
       (implies (var-info-equiv x y)
                (var-info-equiv y x))
       (implies (and (var-info-equiv x y)
                     (var-info-equiv y z))
                (var-info-equiv x z)))
  :rule-classes (:equivalence))

Theorem: var-info-equiv-implies-equal-var-info-fix-1

(defthm var-info-equiv-implies-equal-var-info-fix-1
  (implies (var-info-equiv acl2::x x-equiv)
           (equal (var-info-fix acl2::x)
                  (var-info-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: var-info-fix-under-var-info-equiv

(defthm var-info-fix-under-var-info-equiv
  (var-info-equiv (var-info-fix acl2::x)
                  acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-var-info-fix-1-forward-to-var-info-equiv

(defthm equal-of-var-info-fix-1-forward-to-var-info-equiv
  (implies (equal (var-info-fix acl2::x) acl2::y)
           (var-info-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: equal-of-var-info-fix-2-forward-to-var-info-equiv

(defthm equal-of-var-info-fix-2-forward-to-var-info-equiv
  (implies (equal acl2::x (var-info-fix acl2::y))
           (var-info-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: var-info-equiv-of-var-info-fix-1-forward

(defthm var-info-equiv-of-var-info-fix-1-forward
  (implies (var-info-equiv (var-info-fix acl2::x)
                           acl2::y)
           (var-info-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: var-info-equiv-of-var-info-fix-2-forward

(defthm var-info-equiv-of-var-info-fix-2-forward
  (implies (var-info-equiv acl2::x (var-info-fix acl2::y))
           (var-info-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)