;; For :DYNAMIC-EXTENT: a list of all DX LVARs, preserved by this
;; cleanup. This is filled when the cleanup is created (now by
;; locall call analysis) and is rechecked by physical environment
;; For :DYNAMIC-EXTENT: a list of all DX LVARs, preserved by this
;; cleanup. This is filled when the cleanup is created (now by
;; locall call analysis) and is rechecked by physical environment