X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fpolicy.lisp;h=413e42531497686a2736112727867d692aebe9ab;hb=4fa1c71c7dfa5c6d361304321cc67069a6410694;hp=c51bf365d5a3ece137fe651c52f5bfe4c687b9c2;hpb=2bdf5a3484eda55b0d4b9313aa6b3505b6d7cbd8;p=sbcl.git diff --git a/src/compiler/policy.lisp b/src/compiler/policy.lisp index c51bf36..413e425 100644 --- a/src/compiler/policy.lisp +++ b/src/compiler/policy.lisp @@ -14,6 +14,43 @@ ;;; a value for an optimization declaration (def!type policy-quality () '(integer 0 3)) +;;; global policy restrictions +(defvar *policy-restrictions* nil) + +(defun restrict-compiler-policy (&optional quality (min 0)) + #!+sb-doc + "Assing a minimum value to an optimization quality. QUALITY is the name of +the optimization quality to restrict, and MIN (defaulting to zero) is the +minimum allowed value. + +Returns the alist describing the current policy restrictions. + +If QUALITY is NIL or not given, nothing is done. + +Otherwise, if MIN is zero or not given, any existing restrictions of QUALITY +are removed. If MIN is between one and three inclusive, it becomes the new +minimum value for the optimization quality: any future proclamations or +declarations of the quality with a value less then MIN behave as if the value +was MIN instead. + +This is intended to be used interactively, to facilitate recompiling large +bodies of code with eg. a known minimum safety. + +See also :POLICY option in WITH-COMPILATION-UNIT. + +EXPERIMENTAL INTERFACE: Subject to change." + (declare (type policy-quality min)) + (when quality + (aver (policy-quality-name-p quality)) + (if (zerop min) + (setf *policy-restrictions* + (remove quality *policy-restrictions* :key #'car)) + (let ((cell (assoc quality *policy-restrictions*))) + (if cell + (setf (cdr cell) min) + (push (cons quality min) *policy-restrictions*))))) + *policy-restrictions*) + ;;; CMU CL used a special STRUCTURE-OBJECT type POLICY to represent ;;; the state of optimization policy at any point in compilation. This ;;; was a natural choice, but in SBCL it became a little troublesome @@ -22,30 +59,40 @@ ;;; alists instead. (def!type policy () 'list) -(eval-when (#-sb-xc-host :compile-toplevel :load-toplevel :execute) - (defstruct policy-dependent-quality - dummy - name - expression - getter - values-documentation)) +(defstruct policy-dependent-quality + name + expression + getter + values-documentation) ;;; names of recognized optimization policy qualities (defvar *policy-qualities*) ; (initialized at cold init) -(eval-when (:compile-toplevel :load-toplevel :execute) - (defvar *policy-dependent-qualities* nil)) ; alist of POLICY-DEPENDENT-QUALITYs +(defvar *policy-dependent-qualities* nil) ; alist of POLICY-DEPENDENT-QUALITYs ;;; Is X the name of an optimization policy quality? (defun policy-quality-name-p (x) (or (memq x *policy-qualities*) (assq x *policy-dependent-qualities*))) +;;; Is it deprecated? +(defun policy-quality-deprecation-warning (quality) + (when (member quality '(stack-allocate-dynamic-extent stack-allocate-vector + stack-allocate-value-cells)) + (deprecation-warning :late "1.0.19.7" quality '*stack-allocate-dynamic-extent* + :runtime-error nil) + t)) + ;;; *POLICY* holds the current global compiler policy 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. (declaim (type policy *policy*)) -(defvar *policy*) ; initialized in cold init +(defvar *policy*) ; initialized in cold init + +(defun sort-policy (policy) + ;; We occasionally want to compare policies using EQL, hence we + ;; canonize the order. + (sort policy #'string< :key #'car)) ;;; 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 @@ -53,27 +100,33 @@ ;;; OPTIMIZE forms have messed with it. (defun !policy-cold-init-or-resanify () (setf *policy-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)) + '(;; 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* - (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-qualities*))) + (sort-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-qualities*))) + (setf *policy-restrictions* nil) + ;; not actually POLICY, but very similar + (setf *handled-conditions* nil + *disabled-package-locks* nil)) + ;;; On the cross-compilation host, we initialize immediately (not ;;; waiting for "cold init", since cold init doesn't exist on ;;; cross-compilation host). @@ -83,9 +136,14 @@ ;;; called by compiler code for known-valid QUALITY-NAMEs, e.g. SPEED; ;;; it's an error if it's called for a quality which isn't defined. (defun policy-quality (policy quality-name) + (aver (policy-quality-name-p quality-name)) + (%policy-quality policy quality-name)) + +(defun %policy-quality (policy quality-name) (let* ((acons (assoc quality-name policy)) + (min (or (cdr (assoc quality-name *policy-restrictions*)) 0)) (result (or (cdr acons) 1))) - result)) + (max result min))) ;;; syntactic sugar for querying optimization policy qualities ;;; @@ -94,34 +152,36 @@ ;;; referring to them by name, e.g. (> SPEED SPACE). (defmacro policy (thing expr) (let* ((n-policy (gensym "N-POLICY-")) - (binds (mapcar (lambda (name) - `(,name (policy-quality ,n-policy ',name))) - *policy-qualities*)) + (binds (mapcar (lambda (name) + `(,name (policy-quality ,n-policy ',name))) + *policy-qualities*)) (dependent-binds (loop for (name . info) in *policy-dependent-qualities* - collect `(,name (policy-quality ,n-policy ',name)) - collect `(,name (if (= ,name 1) - ,(policy-dependent-quality-expression info) - ,name))))) - `(let* ((,n-policy (%coerce-to-policy ,thing)) - ,@binds - ,@dependent-binds) - (declare (ignorable ,@*policy-qualities* - ,@(mapcar #'car *policy-dependent-qualities*))) - ,expr))) + collect `(,name (let ((,name (policy-quality ,n-policy ',name))) + (if (= ,name 1) + ,(policy-dependent-quality-expression info) + ,name)))))) + `(let* ((,n-policy (%coerce-to-policy ,thing))) + (declare (ignorable ,n-policy)) + (symbol-macrolet (,@binds + ,@dependent-binds) + ,expr)))) ;;; Dependent qualities (defmacro define-optimization-quality - (name expression &optional documentation) + (name expression &optional values-documentation documentation) + (declare (ignorable documentation)) `(eval-when (:compile-toplevel :load-toplevel :execute) (let ((acons (assoc ',name *policy-dependent-qualities*)) (item (make-policy-dependent-quality :name ',name :expression ',expression :getter (lambda (policy) (policy policy ,expression)) - :values-documentation ',documentation))) + :values-documentation ',values-documentation))) (if acons (setf (cdr acons) item) - (push `(,',name . ,item) *policy-dependent-qualities*))) + (setf *policy-dependent-qualities* + (nconc *policy-dependent-qualities* (list `(,',name . ,item)))))) + #-sb-xc-host + ,@(when documentation `((setf (fdocumentation ',name 'optimize) ,documentation))) ',name)) -