X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fknownfun.lisp;h=d28f79eef4c6473ffdd18c86559969221d946b41;hb=b7192afcef9bbfd3fe1a4e2bfe3c73f853d164d1;hp=ee94ecdd572a73cce26fa0e9b1ff75e5ffb89bca;hpb=34dd23563d2f5cf05c72b971da0d0b065a09bf2a;p=sbcl.git diff --git a/src/compiler/knownfun.lisp b/src/compiler/knownfun.lisp index ee94ecd..d28f79e 100644 --- a/src/compiler/knownfun.lisp +++ b/src/compiler/knownfun.lisp @@ -25,7 +25,7 @@ ;;; breakdown of side effects, since we do very little code motion on ;;; IR1. We are interested in some deeper semantic properties such as ;;; whether it is safe to pass stack closures to. -(def-boolean-attribute ir1 +(!def-boolean-attribute ir1 ;; may call functions that are passed as arguments. In order to ;; determine what other effects are present, we must find the ;; effects of all arguments that may be functions. @@ -49,15 +49,26 @@ ;; mark these functions as foldable in this database. foldable ;; may be eliminated if value is unused. The function has no side - ;; effects except possibly CONS. If a function is defined to signal - ;; errors, then it is not flushable even if it is movable or - ;; foldable. + ;; effects except possibly cons. If a function might signal errors, + ;; then it is not flushable even if it is movable, foldable or + ;; unsafely-flushable. Implies UNSAFELY-FLUSHABLE. (In safe code + ;; type checking of arguments is always performed by the caller, so + ;; a function which SHOULD signal an error if arguments are not of + ;; declared types may be FLUSHABLE.) flushable + ;; unsafe call may be eliminated if value is unused. The function + ;; has no side effects except possibly cons and signalling an error + ;; in the safe code. If a function MUST signal errors, then it is + ;; not unsafely-flushable even if it is movable or foldable. + unsafely-flushable ;; may be moved with impunity. Has no side effects except possibly ;; consing, and is affected only by its arguments. movable ;; The function is a true predicate likely to be open-coded. Convert - ;; any non-conditional uses into (IF T NIL). + ;; any non-conditional uses into (IF T NIL). Not usually + ;; specified to DEFKNOWN, since this is implementation dependent, + ;; and is usually automatically set by the DEFINE-VOP :CONDITIONAL + ;; option. predicate ;; Inhibit any warning for compiling a recursive definition. ;; (Normally the compiler warns when compiling a recursive @@ -89,33 +100,31 @@ ;; If true, a special-case LTN annotation method that is used in ;; place of the standard type/policy template selection. It may use ;; arbitrary code to choose a template, decide to do a full call, or - ;; conspire with the IR2-Convert method to do almost anything. The - ;; Combination node is passed as the argument. + ;; conspire with the IR2-CONVERT method to do almost anything. The + ;; COMBINATION node is passed as the argument. (ltn-annotate nil :type (or function null)) ;; If true, the special-case IR2 conversion method for this ;; function. This deals with funny functions, and anything else that ;; can't be handled using the template mechanism. The Combination - ;; node and the IR2-Block are passed as arguments. + ;; node and the IR2-BLOCK are passed as arguments. (ir2-convert nil :type (or function null)) ;; all the templates that could be used to translate this function ;; into IR2, sorted by increasing cost. (templates nil :type list) ;; If non-null, then this function is a unary type predicate for ;; this type. - (predicate-type nil :type (or ctype null)) - ;; If non-null, use this function to annotate the known call for the - ;; byte compiler. If it returns NIL, then change the call to :full. - (byte-annotate nil :type (or function null))) + (predicate-type nil :type (or ctype null))) (defprinter (fun-info) + (attributes :test (not (zerop attributes)) + :prin1 (decode-ir1-attributes attributes)) (transforms :test transforms) (derive-type :test derive-type) (optimizer :test optimizer) (ltn-annotate :test ltn-annotate) (ir2-convert :test ir2-convert) (templates :test templates) - (predicate-type :test predicate-type) - (byte-annotate :test byte-annotate)) + (predicate-type :test predicate-type)) ;;;; interfaces to defining macros @@ -135,37 +144,33 @@ ;; string used in efficiency notes (note (missing-arg) :type string) ;; 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? - ;; - ;; FIXME: Now that there's no byte compiler, this is stale and could - ;; all go away. - (when :native :type (member :byte :native :both))) + (important nil :type (member t nil))) -(defprinter (transform) type note important when) +(defprinter (transform) type note important) ;;; Grab the FUN-INFO and enter the function, replacing any old ;;; one with the same type and note. (declaim (ftype (function (t list function &optional (or string null) - (member t nil) (member :native :byte :both)) + (member t nil)) *) %deftransform)) -(defun %deftransform (name type fun &optional note important (when :native)) +(defun %deftransform (name type fun &optional note important) (let* ((ctype (specifier-type type)) (note (or note "optimize")) (info (fun-info-or-lose name)) (old (find-if (lambda (x) (and (type= (transform-type x) ctype) (string-equal (transform-note x) note) - (eq (transform-important x) important) - (eq (transform-when x) when))) + (eq (transform-important x) important))) (fun-info-transforms info)))) - (if old - (setf (transform-function old) fun - (transform-note old) note) - (push (make-transform :type ctype :function fun :note note - :important important :when when) - (fun-info-transforms info))) + (cond (old + (style-warn "Overwriting ~S" old) + (setf (transform-function old) fun + (transform-note old) note)) + (t + (push (make-transform :type ctype :function fun :note note + :important important) + (fun-info-transforms info)))) name)) ;;; Make a FUN-INFO structure with the specified type, attributes @@ -178,8 +183,8 @@ (defun %defknown (names type attributes &key derive-type optimizer) (let ((ctype (specifier-type type)) (info (make-fun-info :attributes attributes - :derive-type derive-type - :optimizer optimizer)) + :derive-type derive-type + :optimizer optimizer)) (target-env *info-environment*)) (dolist (name names) (let ((old-fun-info (info :function :info name))) @@ -207,7 +212,7 @@ ;;; 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) fun-info) fun-info-or-lose)) +(declaim (ftype (sfunction (t) fun-info) fun-info-or-lose)) (defun fun-info-or-lose (name) (let (;; FIXME: Do we need this rebinding here? It's a literal ;; translation of the old CMU CL rebinding to @@ -257,12 +262,37 @@ (when (csubtypep type ltype) ltype)))))))) -;;; Derive the type to be the type specifier which is the N'th arg. +;;; Derive the type to be the type specifier which is the Nth arg. (defun result-type-specifier-nth-arg (n) (lambda (call) (declare (type combination call)) (let ((cont (nth (1- n) (combination-args call)))) (when (and cont (constant-continuation-p cont)) - (specifier-type (continuation-value cont)))))) + (careful-specifier-type (continuation-value cont)))))) + +;;; Derive the type to be the type specifier which is the Nth arg, +;;; with the additional restriptions noted in the CLHS for STRING and +;;; SIMPLE-STRING. +(defun creation-result-type-specifier-nth-arg (n) + (lambda (call) + (declare (type combination call)) + (let ((cont (nth (1- n) (combination-args call)))) + (when (and cont (constant-continuation-p cont)) + (let* ((specifier (continuation-value cont)) + (lspecifier (if (atom specifier) (list specifier) specifier))) + (cond + ((eq (car lspecifier) 'string) + (destructuring-bind (string &rest size) + lspecifier + (declare (ignore string)) + (careful-specifier-type + `(vector character ,@(when size size))))) + ((eq (car lspecifier) 'simple-string) + (destructuring-bind (simple-string &rest size) + lspecifier + (declare (ignore simple-string)) + (careful-specifier-type + `(simple-array character ,@(if size (list size) '((*))))))) + (t (careful-specifier-type specifier)))))))) (/show0 "knownfun.lisp end of file")