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Rangeresolve

Vl-rangeresolve

Signature
(vl-rangeresolve x ss warnings) → (mv warnings new-x)
Arguments: x — Guard (vl-range-p x).; ss — Guard (vl-scopestack-p ss).; warnings — Guard (vl-warninglist-p warnings).
Returns: warnings — Type (vl-warninglist-p warnings).; new-x — Type (vl-range-p new-x).

Definitions and Theorems

Function: vl-rangeresolve

(defun vl-rangeresolve (x ss warnings)
 (declare (xargs :guard (and (vl-range-p x)
                             (vl-scopestack-p ss)
                             (vl-warninglist-p warnings))))
 (declare (ignorable ss))
 (let ((__function__ 'vl-rangeresolve))
  (declare (ignorable __function__))
  (b* ((x (vl-range-fix x))
       (warnings (vl-warninglist-fix warnings)))
   (b*
    (((vl-range x) x)
     ((mv msb-ok msb)
      (vl-consteval x.msb ss))
     ((mv lsb-ok lsb)
      (vl-consteval x.lsb ss))
     ((unless (and msb-ok lsb-ok))
      (mv (warn :type :vl-bad-range
                :msg "Unable to safely resolve range ~a0."
                :args (list x))
          x))
     (msb (vl-make-index (vl-resolved->val msb)))
     (lsb (vl-make-index (vl-resolved->val lsb)))
     (new-range (hons-copy (make-vl-range :msb msb :lsb lsb)))
     (new-range-size (vl-range-size new-range))
     ((when (>= new-range-size (expt 2 20)))
      (mv
       (fatal
        :type :vl-range-too-big
        :msg
        "Range ~a0 is going to have size ~x1.  This is crazy. ~
                         Causing a fatal warning to prevent further ~
                         simplification of this module."
        :args (list x new-range-size))
       x)))
    (mv (ok) new-range)))))

Theorem: vl-warninglist-p-of-vl-rangeresolve.warnings

(defthm vl-warninglist-p-of-vl-rangeresolve.warnings
  (b* (((mv ?warnings ?new-x)
        (vl-rangeresolve x ss warnings)))
    (vl-warninglist-p warnings))
  :rule-classes :rewrite)

Theorem: vl-range-p-of-vl-rangeresolve.new-x

(defthm vl-range-p-of-vl-rangeresolve.new-x
  (b* (((mv ?warnings ?new-x)
        (vl-rangeresolve x ss warnings)))
    (vl-range-p new-x))
  :rule-classes :rewrite)

Theorem: vl-rangeresolve-of-vl-range-fix-x

(defthm vl-rangeresolve-of-vl-range-fix-x
  (equal (vl-rangeresolve (vl-range-fix x)
                          ss warnings)
         (vl-rangeresolve x ss warnings)))

Theorem: vl-rangeresolve-vl-range-equiv-congruence-on-x

(defthm vl-rangeresolve-vl-range-equiv-congruence-on-x
  (implies (vl-range-equiv x x-equiv)
           (equal (vl-rangeresolve x ss warnings)
                  (vl-rangeresolve x-equiv ss warnings)))
  :rule-classes :congruence)

Theorem: vl-rangeresolve-of-vl-scopestack-fix-ss

(defthm vl-rangeresolve-of-vl-scopestack-fix-ss
  (equal (vl-rangeresolve x (vl-scopestack-fix ss)
                          warnings)
         (vl-rangeresolve x ss warnings)))

Theorem: vl-rangeresolve-vl-scopestack-equiv-congruence-on-ss

(defthm vl-rangeresolve-vl-scopestack-equiv-congruence-on-ss
  (implies (vl-scopestack-equiv ss ss-equiv)
           (equal (vl-rangeresolve x ss warnings)
                  (vl-rangeresolve x ss-equiv warnings)))
  :rule-classes :congruence)

Theorem: vl-rangeresolve-of-vl-warninglist-fix-warnings

(defthm vl-rangeresolve-of-vl-warninglist-fix-warnings
  (equal (vl-rangeresolve x ss (vl-warninglist-fix warnings))
         (vl-rangeresolve x ss warnings)))

Theorem: vl-rangeresolve-vl-warninglist-equiv-congruence-on-warnings

(defthm vl-rangeresolve-vl-warninglist-equiv-congruence-on-warnings
  (implies (vl-warninglist-equiv warnings warnings-equiv)
           (equal (vl-rangeresolve x ss warnings)
                  (vl-rangeresolve x ss warnings-equiv)))
  :rule-classes :congruence)