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Stripping-functions

Vl-initial-strip

Signature
(vl-initial-strip x) → new-x
Arguments: x — Guard (vl-initial-p x).
Returns: new-x — Type (vl-initial-p new-x).

Definitions and Theorems

Function: vl-initial-strip

(defun vl-initial-strip (x)
  (declare (xargs :guard (vl-initial-p x)))
  (let ((__function__ 'vl-initial-strip))
    (declare (ignorable __function__))
    (b* (((vl-initial x) (vl-initial-fix x)))
      (b* ((stmt (vl-stmt-strip x.stmt))
           (atts ((lambda (x) (declare (ignore x)) nil)
                  x.atts))
           (loc ((lambda (x)
                   (declare (ignore x))
                   *vl-fakeloc*)
                 x.loc)))
        (change-vl-initial x
                           :stmt stmt
                           :atts atts
                           :loc loc)))))

Theorem: vl-initial-p-of-vl-initial-strip

(defthm vl-initial-p-of-vl-initial-strip
  (b* ((new-x (vl-initial-strip x)))
    (vl-initial-p new-x))
  :rule-classes :rewrite)

Theorem: vl-initial-strip-of-vl-initial-fix-x

(defthm vl-initial-strip-of-vl-initial-fix-x
  (equal (vl-initial-strip (vl-initial-fix x))
         (vl-initial-strip x)))

Theorem: vl-initial-strip-vl-initial-equiv-congruence-on-x

(defthm vl-initial-strip-vl-initial-equiv-congruence-on-x
  (implies (vl-initial-equiv x x-equiv)
           (equal (vl-initial-strip x)
                  (vl-initial-strip x-equiv)))
  :rule-classes :congruence)