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Remove-toohard

Vl-atom-toohard

Signature
(vl-atom-toohard x) → ans
Arguments: x — Guard (vl-expr-p x).
Returns: ans — NIL if the atom is okay, or X otherwise.
Type (equal (vl-expr-p ans) (if ans t nil)).

Definitions and Theorems

Function: vl-atom-toohard

(defun vl-atom-toohard (x)
  (declare (xargs :guard (vl-expr-p x)))
  (declare (xargs :guard (vl-atom-p x)))
  (let ((__function__ 'vl-atom-toohard))
    (declare (ignorable __function__))
    (b* ((x (vl-expr-fix x))
         (guts (vl-atom->guts x))
         ((when (or (vl-fast-id-p guts)
                    (vl-fast-constint-p guts)
                    (vl-fast-weirdint-p guts)))
          nil))
      x)))

Theorem: return-type-of-vl-atom-toohard

(defthm return-type-of-vl-atom-toohard
  (b* ((ans (vl-atom-toohard x)))
    (equal (vl-expr-p ans) (if ans t nil)))
  :rule-classes :rewrite)

Theorem: vl-atom-toohard-of-vl-expr-fix-x

(defthm vl-atom-toohard-of-vl-expr-fix-x
  (equal (vl-atom-toohard (vl-expr-fix x))
         (vl-atom-toohard x)))

Theorem: vl-atom-toohard-vl-expr-equiv-congruence-on-x

(defthm vl-atom-toohard-vl-expr-equiv-congruence-on-x
  (implies (vl-expr-equiv x x-equiv)
           (equal (vl-atom-toohard x)
                  (vl-atom-toohard x-equiv)))
  :rule-classes :congruence)