1 ;;;; This file contains load-time support for declaration processing.
2 ;;;; In CMU CL it was split off from the compiler so that the compiler
3 ;;;; doesn't have to be in the cold load, but in SBCL the compiler is
4 ;;;; in the cold load again, so this might not be valuable.
6 ;;;; This software is part of the SBCL system. See the README file for
9 ;;;; This software is derived from the CMU CL system, which was
10 ;;;; written at Carnegie Mellon University and released into the
11 ;;;; public domain. The software is in the public domain and is
12 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
13 ;;;; files for more information.
17 ;;; A list of UNDEFINED-WARNING structures representing references to unknown
18 ;;; stuff which came up in a compilation unit.
19 (defvar *undefined-warnings*)
20 (declaim (list *undefined-warnings*))
22 ;;; Look up some symbols in *FREE-VARS*, returning the var
23 ;;; structures for any which exist. If any of the names aren't
24 ;;; symbols, we complain.
25 (declaim (ftype (function (list) list) get-old-vars))
26 (defun get-old-vars (names)
28 (dolist (name names (vars))
29 (unless (symbolp name)
30 (compiler-error "The name ~S is not a symbol." name))
31 (let ((old (gethash name *free-vars*)))
32 (when old (vars old))))))
34 ;;; Return a new POLICY containing the policy information represented
35 ;;; by the optimize declaration SPEC. Any parameters not specified are
36 ;;; defaulted from the POLICY argument.
37 (declaim (ftype (function (list policy) policy) process-optimize-decl))
38 (defun process-optimize-decl (spec policy)
40 ;; Add new entries from SPEC.
41 (dolist (q-and-v-or-just-q (cdr spec))
42 (multiple-value-bind (quality raw-value)
43 (if (atom q-and-v-or-just-q)
44 (values q-and-v-or-just-q 3)
45 (destructuring-bind (quality raw-value) q-and-v-or-just-q
46 (values quality raw-value)))
47 (cond ((not (policy-quality-name-p quality))
48 (compiler-warn "ignoring unknown optimization quality ~
51 ((not (typep raw-value 'policy-quality))
52 (compiler-warn "ignoring bad optimization value ~S in ~S"
55 (push (cons quality raw-value)
57 ;; Add any nonredundant entries from old POLICY.
58 (dolist (old-entry policy)
59 (unless (assq (car old-entry) result)
60 (push old-entry result)))
64 ;;; ANSI defines the declaration (FOO X Y) to be equivalent to
65 ;;; (TYPE FOO X Y) when FOO is a type specifier. This function
66 ;;; implements that by converting (FOO X Y) to (TYPE FOO X Y).
67 (defun canonized-decl-spec (decl-spec)
68 (let ((id (first decl-spec)))
70 (error "The declaration identifier is not a symbol: ~S" id))
71 (let ((id-is-type (info :type :kind id))
72 (id-is-declared-decl (info :declaration :recognized id)))
73 (cond ((and id-is-type id-is-declared-decl)
75 "ambiguous declaration ~S:~% ~
76 ~S was declared as a DECLARATION, but is also a type name."
79 (cons 'type decl-spec))
83 (!begin-collecting-cold-init-forms)
84 (!cold-init-forms (defvar *queued-proclaims* nil))
85 (!defun-from-collected-cold-init-forms !early-proclaim-cold-init)
87 (defun sb!xc:proclaim (raw-form)
88 #+sb-xc (/show0 "entering PROCLAIM, RAW-FORM=..")
89 #+sb-xc (/hexstr raw-form)
90 (let* ((form (canonized-decl-spec raw-form))
96 (unless (symbolp name)
97 (error "can't declare a non-symbol as SPECIAL: ~S" name))
98 (when (constantp name)
99 (error "can't declare a constant as SPECIAL: ~S" name))
100 (clear-info :variable :constant-value name)
101 (setf (info :variable :kind name) :special)))
103 (if *type-system-initialized*
104 (let ((type (specifier-type (first args))))
105 (dolist (name (rest args))
106 (unless (symbolp name)
107 (error "can't declare TYPE of a non-symbol: ~S" name))
108 (when (eq (info :variable :where-from name) :declared)
109 (let ((old-type (info :variable :type name)))
110 (when (type/= type old-type)
111 (style-warn "The new TYPE proclamation~% ~S~@
112 for ~S does not match the old TYPE~@
114 type name old-type))))
115 (setf (info :variable :type name) type)
116 (setf (info :variable :where-from name) :declared)))
117 (push raw-form *queued-proclaims*)))
119 (if *type-system-initialized*
120 (let ((ctype (specifier-type (first args))))
121 (unless (csubtypep ctype (specifier-type 'function))
122 (error "not a function type: ~S" (first args)))
123 (dolist (name (rest args))
124 (when (eq (info :function :where-from name) :declared)
125 (let ((old-type (info :function :type name)))
126 (when (type/= ctype old-type)
128 "new FTYPE proclamation~@
130 for ~S does not match old FTYPE proclamation~@
132 ctype name old-type))))
134 ;; Now references to this function shouldn't be warned
135 ;; about as undefined, since even if we haven't seen a
136 ;; definition yet, we know one is planned.
138 ;; Other consequences of we-know-you're-a-function-now
139 ;; are appropriate too, e.g. any MACRO-FUNCTION goes away.
140 (proclaim-as-fun-name name)
141 (note-name-defined name :function)
143 ;; the actual type declaration
144 (setf (info :function :type name) ctype
145 (info :function :where-from name) :declared)))
146 (push raw-form *queued-proclaims*)))
149 (let ((class (specifier-type type)))
150 (when (typep class 'classoid)
151 (setf (classoid-state class) :sealed)
152 (let ((subclasses (classoid-subclasses class)))
154 (dohash (subclass layout subclasses)
155 (declare (ignore layout))
156 (setf (classoid-state subclass) :sealed))))))))
158 (setq *policy* (process-optimize-decl form *policy*)))
159 ((inline notinline maybe-inline)
161 (proclaim-as-fun-name name) ; since implicitly it is a function
162 (setf (info :function :inlinep name)
165 (notinline :notinline)
166 (maybe-inline :maybe-inline)))))
169 (unless (symbolp decl)
170 (error "In~% ~S~%the declaration to be recognized is not a ~
173 (setf (info :declaration :recognized decl) t)))
175 (unless (info :declaration :recognized kind)
176 (compiler-warn "unrecognized declaration ~S" raw-form)))))
177 #+sb-xc (/show0 "returning from PROCLAIM")