0.8.0.3:

[sbcl.git] / src / code / typedefs.lisp

diff --git a/src/code/typedefs.lisp b/src/code/typedefs.lisp
index 6169ace..45b9104 100644 (file)
--- a/src/code/typedefs.lisp
+++ b/src/code/typedefs.lisp
@@ -76,7 +76,7 @@
   (enumerable nil :read-only t)
   ;; an arbitrary hash code used in EQ-style hashing of identity
   ;; (since EQ hashing can't be done portably)
-  (hash-value (random (1+ most-positive-fixnum))
+  (hash-value (random #.(ash 1 20))
              :type (and fixnum unsigned-byte)
              :read-only t)
   ;; Can this object contain other types? A global property of our
@@ -128,6 +128,15 @@
   (logand (logxor (ash (type-hash-value type1) -3)
                  (type-hash-value type2))
          #xFF))
+#!-sb-fluid (declaim (inline type-list-cache-hash))
+(declaim (ftype (function (list) (unsigned-byte 8)) type-list-cache-hash))
+(defun type-list-cache-hash (types)
+  (logand (loop with res = 0
+             for type in types
+             for hash = (type-hash-value type)
+             do (setq res (logxor res hash))
+             finally (return res))
+         #xFF))
 \f
 ;;;; cold loading initializations