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Selfassigns

Vl-module-check-selfassigns

Check the assignments of a module for self-assignments to bits.

Signature
(vl-module-check-selfassigns x ss) → new-x
Arguments: x — Guard (vl-module-p x).; ss — Guard (vl-scopestack-p ss).
Returns: new-x — Type (vl-module-p new-x).

(vl-module-check-selfassigns x ss) checks all of the assignments in the module x for selfassigns, and adds any warnings to the module.

Definitions and Theorems

Function: vl-module-check-selfassigns

(defun vl-module-check-selfassigns (x ss)
  (declare (xargs :guard (and (vl-module-p x)
                              (vl-scopestack-p ss))))
  (let ((__function__ 'vl-module-check-selfassigns))
    (declare (ignorable __function__))
    (b* (((vl-module x) (vl-module-fix x))
         ((unless x.assigns) x)
         (ss (vl-scopestack-push x ss))
         (warnings (vl-assignlist-check-selfassigns x.assigns ss))
         ((unless warnings) x))
      (change-vl-module x
                        :warnings (append warnings x.warnings)))))

Theorem: vl-module-p-of-vl-module-check-selfassigns

(defthm vl-module-p-of-vl-module-check-selfassigns
  (b* ((new-x (vl-module-check-selfassigns x ss)))
    (vl-module-p new-x))
  :rule-classes :rewrite)

Theorem: vl-module-check-selfassigns-of-vl-module-fix-x

(defthm vl-module-check-selfassigns-of-vl-module-fix-x
  (equal (vl-module-check-selfassigns (vl-module-fix x)
                                      ss)
         (vl-module-check-selfassigns x ss)))

Theorem: vl-module-check-selfassigns-vl-module-equiv-congruence-on-x

(defthm vl-module-check-selfassigns-vl-module-equiv-congruence-on-x
  (implies (vl-module-equiv x x-equiv)
           (equal (vl-module-check-selfassigns x ss)
                  (vl-module-check-selfassigns x-equiv ss)))
  :rule-classes :congruence)

Theorem: vl-module-check-selfassigns-of-vl-scopestack-fix-ss

(defthm vl-module-check-selfassigns-of-vl-scopestack-fix-ss
  (equal (vl-module-check-selfassigns x (vl-scopestack-fix ss))
         (vl-module-check-selfassigns x ss)))

Theorem: vl-module-check-selfassigns-vl-scopestack-equiv-congruence-on-ss

(defthm
   vl-module-check-selfassigns-vl-scopestack-equiv-congruence-on-ss
  (implies (vl-scopestack-equiv ss ss-equiv)
           (equal (vl-module-check-selfassigns x ss)
                  (vl-module-check-selfassigns x ss-equiv)))
  :rule-classes :congruence)