X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-type.lisp;h=1f877a01bb087f2044ab61da80acf744d2372d10;hb=82cd148d729c241e79c8df04b700beec1b7c55de;hp=153f77dc4649cabe19245fd4f30abfa587997a70;hpb=a530bbe337109d898d5b4a001fc8f1afa3b5dc39;p=sbcl.git diff --git a/src/code/target-type.lisp b/src/code/target-type.lisp index 153f77d..1f877a0 100644 --- a/src/code/target-type.lisp +++ b/src/code/target-type.lisp @@ -11,202 +11,169 @@ (in-package "SB!KERNEL") -(file-comment - "$Header$") - (!begin-collecting-cold-init-forms) -;;; Just call %TYPEP. -;;; -;;; Note that when cross-compiling, SB!XC:TYPEP is interpreted as -;;; a test that the host Lisp object OBJECT translates to a target SBCL -;;; type TYPE. (This behavior is needed e.g. to test for the validity of -;;; numeric subtype bounds read when cross-compiling.) +;;; If TYPE is a type that we can do a compile-time test on, then +;;; return whether the object is of that type as the first value and +;;; second value true. Otherwise return NIL, NIL. ;;; -;;; KLUDGE: In classic CMU CL this was wrapped in a (DECLAIM (START-BLOCK -;;; TYPEP %TYPEP CLASS-CELL-TYPEP)) to make calls efficient. Once I straighten -;;; out bootstrapping and cross-compiling issues it'd likely be a good idea to -;;; do this again. -- WHN 19990413 -(defun typep (object type) - #!+sb-doc - "Return T iff OBJECT is of type TYPE." - (%typep object type)) - -;;; If Type is a type that we can do a compile-time test on, then return the -;;; whether the object is of that type as the first value and second value -;;; true. Otherwise return NIL, NIL. +;;; We give up on unknown types and pick off FUNCTION- and COMPOUND- +;;; types. For STRUCTURE- types, we require that the type be defined +;;; in both the current and compiler environments, and that the +;;; INCLUDES be the same. ;;; -;;; We give up on unknown types and pick off FUNCTION and UNION types. For -;;; structure types, we require that the type be defined in both the current -;;; and compiler environments, and that the INCLUDES be the same. +;;; KLUDGE: This should probably be a type method instead of a big +;;; ETYPECASE. But then the type method system should probably be CLOS +;;; too, and until that happens wedging more stuff into it might be +;;; messy. So I've left it a big ETYPECASE. -- 2001-03-16 (defun ctypep (obj type) (declare (type ctype type)) (etypecase type ((or numeric-type - named-type - member-type - array-type - sb!xc:built-in-class) + named-type + member-type + array-type + character-set-type + built-in-classoid + cons-type + #!+sb-simd-pack simd-pack-type) (values (%typep obj type) t)) - (sb!xc:class - (if (if (csubtypep type (specifier-type 'funcallable-instance)) - (funcallable-instance-p obj) - (typep obj 'instance)) - (if (eq (class-layout type) - (info :type :compiler-layout (sb!xc:class-name type))) - (values (sb!xc:typep obj type) t) - (values nil nil)) - (values nil t))) - (union-type - (dolist (mem (union-type-types type) (values nil t)) - (multiple-value-bind (val win) (ctypep obj mem) - (unless win (return (values nil nil))) - (when val (return (values t t)))))) - (function-type + (classoid + (if (if (csubtypep type (specifier-type 'function)) + (funcallable-instance-p obj) + (%instancep obj)) + (if (eq (classoid-layout type) + (info :type :compiler-layout (classoid-name type))) + (values (sb!xc:typep obj type) t) + (values nil nil)) + (values nil t))) + (compound-type + (funcall (etypecase type + (intersection-type #'every/type) + (union-type #'any/type)) + #'ctypep + obj + (compound-type-types type))) + (fun-type (values (functionp obj) t)) (unknown-type (values nil nil)) (alien-type-type (values (alien-typep obj (alien-type-type-alien-type type)) t)) + (negation-type + (multiple-value-bind (res win) + (ctypep obj (negation-type-type type)) + (if win + (values (not res) t) + (values nil nil)))) (hairy-type ;; Now the tricky stuff. (let* ((hairy-spec (hairy-type-specifier type)) - (symbol (if (consp hairy-spec) (car hairy-spec) hairy-spec))) + (symbol (if (consp hairy-spec) (car hairy-spec) hairy-spec))) (ecase symbol - (and - (if (atom hairy-spec) - (values t t) - (dolist (spec (cdr hairy-spec) (values t t)) - (multiple-value-bind (res win) - (ctypep obj (specifier-type spec)) - (unless win (return (values nil nil))) - (unless res (return (values nil t))))))) - (not - (multiple-value-bind (res win) - (ctypep obj (specifier-type (cadr hairy-spec))) - (if win - (values (not res) t) - (values nil nil)))) - (satisfies - ;; KLUDGE: This stuff might well blow up if we tried to execute it - ;; when cross-compiling. But since for the foreseeable future the - ;; only code we'll try to cross-compile is SBCL itself, and SBCL is - ;; built without using SATISFIES types, it's arguably not important - ;; to worry about this. -- WHN 19990210. - (let ((fun (second hairy-spec))) - (cond ((and (consp fun) - (eq (car fun) 'lambda)) - (values (not (null (funcall (coerce fun 'function) obj))) - t)) - ((and (symbolp fun) (fboundp fun)) - (values (not (null (funcall fun obj))) t)) - (t - (values nil nil)))))))))) + (and + (if (atom hairy-spec) + (values t t) + (dolist (spec (cdr hairy-spec) (values t t)) + (multiple-value-bind (res win) + (ctypep obj (specifier-type spec)) + (unless win (return (values nil nil))) + (unless res (return (values nil t))))))) + (not + (multiple-value-bind (res win) + (ctypep obj (specifier-type (cadr hairy-spec))) + (if win + (values (not res) t) + (values nil nil)))) + (satisfies + ;; If the SATISFIES function is not foldable, we cannot answer! + (let* ((form `(,(second hairy-spec) ',obj))) + (multiple-value-bind (ok result) + (sb!c::constant-function-call-p form nil nil) + (values (not (null result)) ok))))))))) -;;; LAYOUT-OF -- Exported -;;; -;;; Return the layout for an object. This is the basic operation for -;;; finding out the "type" of an object, and is used for generic function -;;; dispatch. The standard doesn't seem to say as much as it should about what -;;; this returns for built-in objects. For example, it seems that we must -;;; return NULL rather than LIST when X is NIL so that GF's can specialize on -;;; NULL. +;;; Return the layout for an object. This is the basic operation for +;;; finding out the "type" of an object, and is used for generic +;;; function dispatch. The standard doesn't seem to say as much as it +;;; should about what this returns for built-in objects. For example, +;;; it seems that we must return NULL rather than LIST when X is NIL +;;; so that GF's can specialize on NULL. #!-sb-fluid (declaim (inline layout-of)) (defun layout-of (x) (declare (optimize (speed 3) (safety 0))) - (cond ((typep x 'instance) (%instance-layout x)) - ((funcallable-instance-p x) (%funcallable-instance-layout x)) - ((null x) - ;; Note: was #.((CLASS-LAYOUT (SB!XC:FIND-CLASS 'NULL))). - ;; I (WHN 19990209) replaced this with an expression evaluated at - ;; run time in order to make it easier to build the cross-compiler. - ;; If it doesn't work, something else will be needed.. - (locally - ;; KLUDGE: In order to really make it run at run time (instead of - ;; doing some weird broken thing at cold load time), - ;; we need to suppress a DEFTRANSFORM.. -- WHN 19991004 - (declare (notinline sb!xc:find-class)) - (class-layout (sb!xc:find-class 'null)))) - (t (svref *built-in-class-codes* (get-type x))))) + (cond ((%instancep x) (%instance-layout x)) + ((funcallable-instance-p x) (%funcallable-instance-layout x)) + ((null x) + ;; Note: was #.((CLASS-LAYOUT (SB!XC:FIND-CLASS 'NULL))). + ;; I (WHN 19990209) replaced this with an expression evaluated at + ;; run time in order to make it easier to build the cross-compiler. + ;; + ;; KLUDGE: Since there's a DEFTRANSFORM for FIND-CLASSOID on + ;; constant names which creates non-cold-loadable code, we + ;; can't just use (CLASSOID-LAYOUT (FIND-CLASSOID 'NULL)) + ;; here. The original (WHN 19991004) solution was to locally + ;; notinline FIND-CLASSOID. However, the full call to + ;; FIND-CLASSOID caused suboptimal register allocation in PCL + ;; dfuns. So instead we now use a special variable which is + ;; initialized during cold init. -- JES, 2006-07-04 + *null-classoid-layout*) + (t (svref *built-in-class-codes* (widetag-of x))))) -#!-sb-fluid (declaim (inline sb!xc:class-of)) -(defun sb!xc:class-of (object) +#!-sb-fluid (declaim (inline classoid-of)) +(defun classoid-of (object) #!+sb-doc "Return the class of the supplied object, which may be any Lisp object, not just a CLOS STANDARD-OBJECT." - (layout-class (layout-of object))) - -;;; Pull the type specifier out of a function object. -(defun extract-function-type (fun) - (if (sb!eval:interpreted-function-p fun) - (sb!eval:interpreted-function-type fun) - (typecase fun - (byte-function (byte-function-type fun)) - (byte-closure (byte-function-type (byte-closure-function fun))) - (t - (specifier-type (%function-type (%closure-function fun))))))) + (layout-classoid (layout-of object))) ;;;; miscellaneous interfaces -;;; Clear memoization of all type system operations that can be altered by -;;; type definition/redefinition. +;;; Clear memoization of all type system operations that can be +;;; altered by type definition/redefinition. +;;; (defun clear-type-caches () - (when *type-system-initialized* - (dolist (sym '(values-specifier-type-cache-clear - values-type-union-cache-clear - type-union-cache-clear - values-subtypep-cache-clear - csubtypep-cache-clear - type-intersection-cache-clear - values-type-intersection-cache-clear)) - (funcall (symbol-function sym)))) + ;; FIXME: We would like to differentiate between different cache + ;; kinds, but at the moment all our caches pretty much are type + ;; caches. + (drop-all-hash-caches) (values)) -;;; Like TYPE-OF, only we return a CTYPE structure instead of a type specifier, -;;; and we try to return the type most useful for type checking, rather than -;;; trying to come up with the one that the user might find most informative. +;;; This is like TYPE-OF, only we return a CTYPE structure instead of +;;; a type specifier, and we try to return the type most useful for +;;; type checking, rather than trying to come up with the one that the +;;; user might find most informative. (declaim (ftype (function (t) ctype) ctype-of)) (defun-cached (ctype-of - :hash-function (lambda (x) (logand (sxhash x) #x1FF)) - :hash-bits 9 - :init-wrapper !cold-init-forms) - ((x eq)) + :hash-function (lambda (x) (logand (sxhash x) #x1FF)) + :hash-bits 9 + :init-wrapper !cold-init-forms) + ((x eq)) (typecase x (function (if (funcallable-instance-p x) - (sb!xc:class-of x) - (extract-function-type x))) + (classoid-of x) + (specifier-type (sb!impl::%fun-type x)))) (symbol (make-member-type :members (list x))) (number - (let* ((num (if (complexp x) (realpart x) x)) - (res (make-numeric-type - :class (etypecase num - (integer 'integer) - (rational 'rational) - (float 'float)) - :format (if (floatp num) - (float-format-name num) - nil)))) - (cond ((complexp x) - (setf (numeric-type-complexp res) :complex) - (let ((imag (imagpart x))) - (setf (numeric-type-low res) (min num imag)) - (setf (numeric-type-high res) (max num imag)))) - (t - (setf (numeric-type-low res) num) - (setf (numeric-type-high res) num))) - res)) + (ctype-of-number x)) (array (let ((etype (specifier-type (array-element-type x)))) (make-array-type :dimensions (array-dimensions x) - :complexp (not (typep x 'simple-array)) - :element-type etype - :specialized-element-type etype))) + :complexp (not (typep x 'simple-array)) + :element-type etype + :specialized-element-type etype))) + (cons + (make-cons-type *universal-type* *universal-type*)) + (character + (specifier-type 'character)) + #!+sb-simd-pack + (simd-pack + (let ((type (nth (%simd-pack-tag x) *simd-pack-element-types*))) + (if type + (specifier-type `(simd-pack ,type)) + (specifier-type 'simd-pack)))) (t - (sb!xc:class-of x)))) - -;;; Clear this cache on GC so that we don't hold onto too much garbage. -(pushnew 'ctype-of-cache-clear *before-gc-hooks*) + (classoid-of x)))) (!defun-from-collected-cold-init-forms !target-type-cold-init)