Add special case in cpnanopass for (eq? (ftype-pointer-address x) 0)

racket/src/ChezScheme/LOG

@@ -2116,3 +2116,5 @@
   i3nt/ti3nt.  more recent versions of gcc sometimes generate sse
   instructions that require 16-byte stack alignment.
     x86.ss
+- add special case in cpnanopass.ss for (eq? (ftype-pointer-address x) 0)
+    cpnanopass.ss

racket/src/ChezScheme/s/cpnanopass.ss

@@ -4600,7 +4600,8 @@
           [(e) (ensure-single-valued e #f)])
         (define-inline 2 eq?
           [(e1 e2)
-           (or (relop-length RELOP= e1 e2)
+           (or (eqvop-null-fptr e1 e2)
+               (relop-length RELOP= e1 e2)
                (%inline eq? ,e1 ,e2))])
         (define-inline 2 keep-live
           [(e) (%seq ,(%inline keep-live ,e) ,(%constant svoid))])