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Expr-tools

Vl-obviously-true-expr-p

Signature
(vl-obviously-true-expr-p x) → *
Arguments: x — Guard (vl-expr-p x).

Definitions and Theorems

Function: vl-obviously-true-expr-p

(defun vl-obviously-true-expr-p (x)
  (declare (xargs :guard (vl-expr-p x)))
  (let ((__function__ 'vl-obviously-true-expr-p))
    (declare (ignorable __function__))
    (and (vl-fast-atom-p x)
         (vl-fast-constint-p (vl-atom->guts x))
         (eql (vl-constint->value (vl-atom->guts x))
              1))))

Theorem: vl-obviously-true-expr-p-of-vl-expr-fix-x

(defthm vl-obviously-true-expr-p-of-vl-expr-fix-x
  (equal (vl-obviously-true-expr-p (vl-expr-fix x))
         (vl-obviously-true-expr-p x)))

Theorem: vl-obviously-true-expr-p-vl-expr-equiv-congruence-on-x

(defthm vl-obviously-true-expr-p-vl-expr-equiv-congruence-on-x
  (implies (vl-expr-equiv x x-equiv)
           (equal (vl-obviously-true-expr-p x)
                  (vl-obviously-true-expr-p x-equiv)))
  :rule-classes :congruence)