(in-package "SB!C")
-(file-comment
- "$Header$")
+(/show0 "knownfun.lisp 17")
;;; IR1 boolean function attributes
;;;
\f
;;;; interfaces to defining macros
-;;; The TRANSFORM structure represents an IR1 transform.
-(defstruct transform
- ;; The function-type which enables this transform.
+;;; an IR1 transform
+(defstruct (transform (:copier nil))
+ ;; the function-type which enables this transform
(type (required-argument) :type ctype)
- ;; The transformation function. Takes the Combination node and Returns a
+ ;; the transformation function. Takes the COMBINATION node and returns a
;; lambda, or throws out.
(function (required-argument) :type function)
- ;; String used in efficency notes.
+ ;; string used in efficency notes
(note (required-argument) :type string)
- ;; T if we should spew a failure note even if speed=brevity.
+ ;; T if we should emit a failure note even if SPEED=INHIBIT-WARNINGS.
(important nil :type (member t nil))
- ;; Usable for byte code, native code, or both.
+ ;; usable for byte code, native code, or both
(when :native :type (member :byte :native :both)))
(defprinter (transform) type note important when)
(info (make-function-info :attributes attributes
:derive-type derive-type
:optimizer optimizer))
- (target-env (or *backend-info-environment* *info-environment*)))
+ (target-env *info-environment*))
(dolist (name names)
+ (let ((old-function-info (info :function :info name)))
+ (when old-function-info
+ ;; This is handled as an error because it's generally a bad
+ ;; thing to blow away all the old optimization stuff. It's
+ ;; also a potential source of sneaky bugs:
+ ;; DEFKNOWN FOO
+ ;; DEFTRANSFORM FOO
+ ;; DEFKNOWN FOO ; possibly hidden inside some macroexpansion
+ ;; ; Now the DEFTRANSFORM doesn't exist in the target Lisp.
+ ;; However, it's continuable because it might be useful to do
+ ;; it when testing new optimization stuff interactively.
+ (cerror "Go ahead, overwrite it."
+ "~@<overwriting old FUNCTION-INFO ~2I~_~S ~I~_for ~S~:>"
+ old-function-info name)))
(setf (info :function :type name target-env) ctype)
(setf (info :function :where-from name target-env) :declared)
(setf (info :function :kind name target-env) :function)
names)
;;; Return the FUNCTION-INFO for NAME or die trying. Since this is
-;;; used by people who want to modify the info, and the info may be
+;;; used by callers who want to modify the info, and the info may be
;;; shared, we copy it. We don't have to copy the lists, since each
;;; function that has generators or transforms has already been
;;; through here.
(declaim (ftype (function (t) function-info) function-info-or-lose))
(defun function-info-or-lose (name)
- (let ((*info-environment* (or *backend-info-environment*
- *info-environment*)))
+ (let (;; FIXME: Do we need this rebinding here? It's a literal
+ ;; translation of the old CMU CL rebinding to
+ ;; (OR *BACKEND-INFO-ENVIRONMENT* *INFO-ENVIRONMENT*),
+ ;; and it's not obvious whether the rebinding to itself is
+ ;; needed that SBCL doesn't need *BACKEND-INFO-ENVIRONMENT*.
+ (*info-environment* *info-environment*))
(let ((old (info :function :info name)))
(unless old (error "~S is not a known function." name))
(setf (info :function :info name) (copy-function-info old)))))
(let ((cont (nth (1- n) (combination-args call))))
(when (and cont (constant-continuation-p cont))
(specifier-type (continuation-value cont))))))
+
+(/show0 "knownfun.lisp end of file")