X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=OPTIMIZATIONS;h=1f8746f14400565d7246281ee0710e2f5721de78;hb=e8d94e7c0f7efc78627e6347d4441f4176e8d160;hp=7c51f473ac7e0301e123fa41db6094598db835d1;hpb=8f4ef01b8c9930d7dd0a56a96845a6d84ca5774d;p=sbcl.git

diff --git a/OPTIMIZATIONS b/OPTIMIZATIONS
index 7c51f47..1f8746f 100644
--- a/OPTIMIZATIONS
+++ b/OPTIMIZATIONS
@@ -169,3 +169,24 @@ then cons up a bignum for it:
     ((89 125 16) (ASH A (MIN 18 -706)))
     (T (DPB -3 (BYTE 30 30) -1))))
 --------------------------------------------------------------------------------
+#16
+(do ((i 0 (1+ i)))
+    ((= i (the (integer 0 100) n)))
+  ...)
+
+It is commonly expected for Python to derive (FIXNUMP I). (If ``='' is
+replaced with ``>='', Python will do.)
+--------------------------------------------------------------------------------
+#17 
+Type tests for (ARRAY BIT), (ARRAY T) and similar go through full
+%TYPEP, even though it is relatively simple to establish the arrayness
+of an object and also to obtain the element type of an array.  As of
+sbcl-0.8.12.30, this affects at least DUMP-OBJECT through
+COMPOUND-OBJECT-P, and (LABELS MAYBE-EMIT-MAKE-LOAD-FORMS GROVEL)
+through TYPEP UNBOXED-ARRAY, within the compiler itself.
+--------------------------------------------------------------------------------
+#18
+(lambda (x) (declare (null x)) (sxhash x)) goes through SYMBOL-HASH
+rather than either constant-folding or manipulating NIL-VALUE or
+NULL-TN directly.
+--------------------------------------------------------------------------------