0.8alpha.0.32:

[sbcl.git] / src / compiler / generic / vm-type.lisp

diff --git a/src/compiler/generic/vm-type.lisp b/src/compiler/generic/vm-type.lisp
index 2e0621c..9c50878 100644 (file)
--- a/src/compiler/generic/vm-type.lisp
+++ b/src/compiler/generic/vm-type.lisp
@@ -82,7 +82,8 @@
 (defvar *specialized-array-element-types*)
 (!cold-init-forms
   (setf *specialized-array-element-types*
-       '(bit
+       '(nil
+         bit
          (unsigned-byte 2)
          (unsigned-byte 4)
          (unsigned-byte 8)
@@ -130,7 +131,12 @@
 (defun specialize-array-type (type)
   (let ((eltype (array-type-element-type type)))
     (setf (array-type-specialized-element-type type)
-         (if (eq eltype *wild-type*)
+         (if (or (eq eltype *wild-type*)
+                 ;; This is slightly dubious, but not as dubious as
+                 ;; assuming that the upgraded-element-type should be
+                 ;; equal to T, given the way that the AREF
+                 ;; DERIVE-TYPE optimizer works.  -- CSR, 2002-08-19
+                 (unknown-type-p eltype))
              *wild-type*
              (dolist (stype-name *specialized-array-element-types*
                                  *universal-type*)
@@ -164,7 +170,7 @@
      (if (type= type (specifier-type 'cons))
         'sb!c:check-cons
         nil))
-    (built-in-class
+    (built-in-classoid
      (if (type= type (specifier-type 'symbol))
         'sb!c:check-symbol
         nil))