(def!type sb!kernel::layout-depthoid () '(or index (integer -1 -1)))
;;; a value for an optimization declaration
-(def!type sb!c::policy-quality () '(or (rational 0 3) null))
+(def!type policy-quality () '(or (rational 0 3) null))
\f
;;;; policy stuff
-;;; a map from optimization policy quality to corresponding POLICY
-;;; slot name, used to automatically keep POLICY-related definitions
-;;; in sync even if future maintenance changes POLICY slots
-(eval-when (:compile-toplevel :load-toplevel :execute)
- (defstruct (policy-quality-slot (:constructor %make-pqs (quality accessor)))
- ;; the name of the quality
- (quality (required-argument) :type symbol)
- ;; the name of the structure slot accessor
- (accessor (required-argument) :type symbol))
- (defparameter *policy-quality-slots*
- (list (%make-pqs 'speed 'policy-speed)
- (%make-pqs 'space 'policy-space)
- (%make-pqs 'safety 'policy-safety)
- (%make-pqs 'cspeed 'policy-cspeed)
- (%make-pqs 'brevity 'policy-brevity)
- (%make-pqs 'debug 'policy-debug)))
- (defun named-policy-quality-slot (name)
- (find name *policy-quality-slots* :key #'policy-quality-slot-quality)))
-
-;;; A POLICY object holds information about the compilation policy for
-;;; a node. See the LEXENV definition for a description of how it is used.
-#.`(def!struct (policy
- (:copier nil)) ; (but see DEFUN COPY-POLICY)
- ,@(mapcar (lambda (pqs)
- `(,(policy-quality-slot-quality pqs) nil
- :type policy-quality))
- *policy-quality-slots*))
-
-;;; an annoyingly hairy way of doing COPY-STRUCTURE on POLICY objects
-;;;
-;;; (We need this explicit, separate, hairy DEFUN only because we need
-;;; to be able to copy POLICY objects in cold init toplevel forms,
-;;; earlier than the default copier closure created by DEFSTRUCT
-;;; toplevel forms would be available, and earlier than LAYOUT-INFO is
-;;; initialized (which is a prerequisite for COPY-STRUCTURE to work).)
-#.`(defun copy-policy (policy)
- (make-policy
- ,@(mapcan (lambda (pqs)
- `(,(keywordicate (policy-quality-slot-quality pqs))
- (,(policy-quality-slot-accessor pqs) policy)))
- *policy-quality-slots*)))
+;;; CMU CL used a special STRUCTURE-OBJECT type POLICY to represent
+;;; the state of optimization policy at any point in compilation. This
+;;; became a little unwieldy, especially because of cold init issues
+;;; for structures and structure accessors, so in SBCL we use an alist
+;;; instead.
+(deftype policy () 'list)
+
+;;; names of recognized optimization qualities which don't have
+;;; special defaulting behavior
+(defvar *policy-basic-qualities*)
+
+;;; FIXME: I'd like to get rid of DECLAIM OPTIMIZE-INTERFACE in favor
+;;; of e.g. (DECLAIM (OPTIMIZE (INTERFACE-SPEED 2) (INTERFACE-SAFETY 3))).
+#|
+;;; a list of conses (DEFAULTING-QUALITY . DEFAULT-QUALITY) of qualities
+;;; which default to other qualities when undefined, e.g. interface
+;;; speed defaulting to basic speed
+(defvar *policy-defaulting-qualities*)
+|#
+
+(defun optimization-quality-p (name)
+ (or (member name *policy-basic-qualities*)
+ ;; FIXME: Uncomment this when OPTIMIZE-INTERFACE goes away.
+ #|(member name *policy-defaulting-qualities* :key #'car)|#))
;;; *DEFAULT-POLICY* holds the current global compiler policy
-;;; information. Whenever the policy is changed, we copy the structure
-;;; so that old uses will still get the old values.
+;;; information, as an alist mapping from optimization quality name to
+;;; quality value. Inside the scope of declarations, new entries are
+;;; added at the head of the alist.
+;;;
;;; *DEFAULT-INTERFACE-POLICY* holds any values specified by an
;;; OPTIMIZE-INTERFACE declaration.
(declaim (type policy *default-policy* *default-interface-policy*))
(defvar *default-policy*) ; initialized in cold init
(defvar *default-interface-policy*) ; initialized in cold init
+
+;;; This is to be called early in cold init to set things up, and may
+;;; also be called again later in cold init in order to reset default
+;;; optimization policy back to default values after toplevel PROCLAIM
+;;; OPTIMIZE forms have messed with it.
+(defun !policy-cold-init-or-resanify ()
+ (setf *policy-basic-qualities*
+ '(;; ANSI standard qualities
+ compilation-speed
+ debug
+ safety
+ space
+ speed
+ ;; SBCL extensions
+ ;;
+ ;; FIXME: INHIBIT-WARNINGS is a misleading name for this.
+ ;; Perhaps BREVITY would be better. But the ideal name would
+ ;; have connotations of suppressing not warnings but only
+ ;; optimization-related notes, which is already mostly the
+ ;; behavior, and should probably become the exact behavior.
+ ;; Perhaps INHIBIT-NOTES?
+ inhibit-warnings))
+ (setf *policy-defaulting-qualities*
+ '((interface-speed . speed)
+ (interface-safety . safety)))
+ (setf *default-policy*
+ (mapcar (lambda (name)
+ ;; CMU CL didn't use 1 as the default for everything,
+ ;; but since ANSI says 1 is the ordinary value, we do.
+ (cons name 1))
+ *policy-basic-qualities*))
+ (setf *default-interface-policy*
+ *default-policy*))
+;;; On the cross-compilation host, we initialize the compiler immediately.
+#+sb-xc-host (!policy-cold-init-or-resanify)
+
+;;; Is X the name of an optimization quality?
+(defun policy-quality-p (x)
+ (memq x *policy-basic-qualities*))
\f
;;; possible values for the INLINE-ness of a function.
(deftype inlinep ()
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