X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fsrctran.lisp;h=d93c0825b6e274aba736cbdb38efd0b042dac705;hb=b43b6e70ce48d959d77f7f56be9d11aa101fdd7d;hp=ca2c4d982c0ef2a0d6ce66ed9d3fa7d9b1271fe7;hpb=750b2f3d09ba0f8c20bbf735cdd5aaeea868c052;p=sbcl.git

diff --git a/src/compiler/srctran.lisp b/src/compiler/srctran.lisp
index ca2c4d9..d93c082 100644
--- a/src/compiler/srctran.lisp
+++ b/src/compiler/srctran.lisp
@@ -114,6 +114,20 @@
 (define-source-transform ninth (x) `(nth 8 ,x))
 (define-source-transform tenth (x) `(nth 9 ,x))
 
+;;; LIST with one arg is an extremely common operation (at least inside
+;;; SBCL itself); translate it to CONS to take advantage of common
+;;; allocation routines.
+(define-source-transform list (&rest args)
+  (case (length args)
+    (1 `(cons ,(first args) nil))
+    (t (values nil t))))
+
+;;; And similarly for LIST*.
+(define-source-transform list* (&rest args)
+  (case (length args)
+    (2 `(cons ,(first args) ,(second args)))
+    (t (values nil t))))
+
 ;;; Translate RPLACx to LET and SETF.
 (define-source-transform rplaca (x y)
   (once-only ((n-x x))
@@ -169,8 +183,8 @@
 (define-source-transform 1+ (x) `(+ ,x 1))
 (define-source-transform 1- (x) `(- ,x 1))
 
-(define-source-transform oddp (x) `(not (zerop (logand ,x 1))))
-(define-source-transform evenp (x) `(zerop (logand ,x 1)))
+(define-source-transform oddp (x) `(logtest ,x 1))
+(define-source-transform evenp (x) `(not (logtest ,x 1)))
 
 ;;; Note that all the integer division functions are available for
 ;;; inline expansion.
@@ -3694,6 +3708,12 @@
        (funcall control *standard-output* ,@arg-names)
        nil)))
 
+(deftransform pathname ((pathspec) (pathname) *)
+  'pathspec)
+
+(deftransform pathname ((pathspec) (string) *)
+  '(values (parse-namestring pathspec)))
+
 (macrolet
     ((def (name)
          `(defoptimizer (,name optimizer) ((control &rest args))
@@ -4055,3 +4075,4 @@
   `(let* ((acons (assoc quality-name policy))
           (result (or (cdr acons) 1)))
      result))
+