X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fgeneric%2Fvm-type.lisp;h=85c1b0b8af7b94b031a66ae7429c36e13e5bb4e3;hb=b63c4fb9b98fa8188e17ba926e150ba417a74635;hp=6c9658ed18275567ebd78bf19b801e28d773a600;hpb=ace140856e6b3f92bb06597092a59753f1e59142;p=sbcl.git

diff --git a/src/compiler/generic/vm-type.lisp b/src/compiler/generic/vm-type.lisp
index 6c9658e..85c1b0b 100644
--- a/src/compiler/generic/vm-type.lisp
+++ b/src/compiler/generic/vm-type.lisp
@@ -145,21 +145,24 @@
   "Return the element type of the most specialized COMPLEX number type that
    can hold parts of type SPEC."
   (declare (ignore environment))
-  (if (unknown-type-p (specifier-type spec))
-      (error "undefined type: ~S" spec)
-      (let ((ctype (specifier-type `(complex ,spec))))
-	(cond
-	  ((eq ctype *empty-type*) '(eql 0))
-	  ((csubtypep ctype (specifier-type '(complex single-float)))
-	   'single-float)
-	  ((csubtypep ctype (specifier-type '(complex double-float)))
-	   'double-float)
-	  #!+long-float
-	  ((csubtypep ctype (specifier-type '(complex long-float)))
-	   'long-float)
-	  ((csubtypep ctype (specifier-type '(complex rational)))
-	   'rational)
-	  (t 'real)))))
+  (let ((type (specifier-type spec)))
+    (cond
+      ((eq type *empty-type*) nil)
+      ((unknown-type-p type) (error "undefined type: ~S" spec))
+      (t
+       (let ((ctype (specifier-type `(complex ,spec))))
+         (cond
+           ((eq ctype *empty-type*) '(eql 0))
+           ((csubtypep ctype (specifier-type '(complex single-float)))
+            'single-float)
+           ((csubtypep ctype (specifier-type '(complex double-float)))
+            'double-float)
+           #!+long-float
+           ((csubtypep ctype (specifier-type '(complex long-float)))
+            'long-float)
+           ((csubtypep ctype (specifier-type '(complex rational)))
+            'rational)
+           (t 'real)))))))
 
 ;;; Return the most specific integer type that can be quickly checked that
 ;;; includes the given type.