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(in-package "BCOMP")
(defvar *immediate-types*
'(fixnum character short-float double-float boolean))
(dolist (v
'((t array package
atom float pathname
bignum function random-state
hash-table ratio single-float
rational standard-char
keyword readtable stream
common list sequence
compiled-function
complex nil signed-byte symbol
cons null unsigned-byte t
number simple-array vector
)
(bit bit)
(integer integer)
(double-float long-float single-float)
(character string-char)
((vector character) string simple-string)
((vector bit) bit-vector simple-bit-vector)
((vector t) simple-vector)
(stream stream)
(dynamic-extent dynamic-extent )
(fix-or-sf-or-df fix-or-sf-or-df)
))
(dolist (w (cdr v))
(setf (get w 'comp-type) (car v))))
(dolist (v *immediate-types*) (setf (get v 'comp-type) v))
(deftype fix-or-sf-or-df nil '(or fixnum short-float double-float))
(deftype boolean nil t)
(proclaim '(declaration dynamic-extent))
;(deftype dynamic-extent nil t)
(defun grab-1-decl (x decls &aux type l tem place)
(tagbody
(go begin)
ERROR
(comp-warn "bad declaration ~a" x)
(return-from grab-1-decl decls)
BEGIN
(or (consp x) (go error))
(setq type (car x) l (cdr x))
(or (null l) (consp l) (go error))
(unless
(symbolp type)
(comp-warn "bad declaration ~a" x)
(return-from grab-1-decl decls)
)
(cond ((or (setq tem (get type 'comp-type))
(and (eq type 'type)
(consp l)
(setq tem (comp-type (car l)))
(setq l (cdr l))))
(unless (eq t (setq tem (comp-type tem)))
(or decls (setq decls (list nil)))
(dolist-safe (v l)
(or (symbolp v) (go error))
(push (cons v tem) (car decls)))))
((eq type 'special)
(cond ((null decls) (setq decls (list nil nil)))
((null (cdr decls))
(setf (cdr decls) (list nil))))
(setq place (cdr decls))
(dolist-safe (v l)
(or (symbolp v) (go error))
(push v (car place))
))
((or (eq type 'inline)
(eq type 'not-inline)
(and (eq type 'ftype)
(progn (desetq (type . l) l) t)))
(dolist-safe (v l) (push
(cons v (increment-function-decl
type (function-declaration v)))
*function-decls*)))
(t nil)))
; (((v1 . type1) (v2 . type2) ..)(special-var1 special-var2 ..))
decls)
(defun best-array-element-type (type)
(cond ((or (eql t type) (null type)) t)
((memq type '(bit unsigned-char signed-char
unsigned-short
signed-short fixnum
character
))
type)
((subtypep type 'fixnum)
(dolist (v '(bit unsigned-char signed-char
unsigned-short
signed-short)
'fixnum)
(cond ((subtypep type v)
(return v)))))
((eql type 'string-char) 'character)
(t (or (dolist (v '(string-char bit short-float
long-float))
(cond ((subtypep type v)
(return v))))
t))))
(deftype type-of (x)
(cond (*in-pass-1*
(let ((tem (b1-walk x 'type-of)))
(result-type tem)))
(t t)))
(defun assure-list (x)
(loop
(if (null x) (return t))
(if (consp x) (setq x (cdr x))
(error "expected a list ~a" x))))
(deftype struct (x) 'structure)
(defun comp-type (type &aux tem element-type sizes)
;; coerce type to ones understood by compiler
(cond ;((member type *immediate-types*)
;(return-from comp-type type))
((and (symbolp type)
(setq tem (get type 'comp-type)))
(return-from comp-type tem))
((and(symbolp type)
(setq tem (get type 'si::deftype-definition)))
(comp-type (funcall tem)))
((consp type)
(cond
((eq (car type) 'struct)
(list 'struct (best-array-element-type (cadr type))))
((progn (setq type (si::normalize-type type)) nil))
((member (car type) '(array simple-array vector simple-vector))
(when (consp (cdr type))
(setq element-type (best-array-element-type (cadr type)))
(when(consp (cddr type))
(setq sizes (caddr type))
(cond ((consp sizes)
(assure-list sizes)
(unless (typep (second sizes) 'fixnum) (setq sizes nil)))
((typep sizes 'fixnum) )
(t (setq sizes nil))))
(cond ((or (eql sizes 1) (null (cdr sizes)))
(setq tem 'vector) (setq sizes nil))
(t (setq tem 'array)))
(list* tem element-type (if sizes (list sizes)))))
((eq (car type) 'integer)
(if (si::sub-interval-p (cdr type)
(list most-negative-fixnum
most-positive-fixnum))
'fixnum
'integer))
((eq (car type) 'values)
(if (null (cddr type))
(comp-type (second type))
(cons 'values (mapcar 'comp-type (cdr (the-list type))))))
(t t)))
(t t)))
(setf (get 'var 'result-type-b1) 'result-type-b1-var)
(defun result-type-b1-var (x) (or (third x) t))
(defun result-type (form &aux fd)
;; compute the result type of form , where FORM is somethign
;; returned by b1-walk
(cond ((consp form)
(cond ((and (symbolp (car form))
(setq fd (get (car form) 'result-type-b1)))
(funcall fd form))
((and (atom (second form))
(typep (second form) 'desk))
(desk-result-type (second form)))
(t t)))
((typep form 'var)
(var-type form))
(t
(wfs-error)
)))
(setf (get 'dv 'result-type-b1) 'dv-result-type)
(defun dv-result-type (x)
(let ((val (third x)))
(cond ((typep val 'fixnum) 'fixnum)
((typep val 'short-float) 'short-float)
((typep val 'double-float) 'double-float)
((typep val 'character) 'character)
((typep val 'character) 'character)
(t t))))
(defun comp-subtypep (x y &aux xa xb)
; (cond ((and (atom x) (not (eq y t)) (not (eq x y))
; (subtypep x y))(comp-warn "subtypep ~a ~a" x y)))
(cond ((eq y t) t)
((atom x)
(subtypep x y))
((atom y)
(subtypep x y))
((member (car x) '(array struct))
(and (eq (car y) (car y)) (subtypep (cdr x) (cdr y))))
(t (subtypep x y))))
(defun type-and (a b)
(if (eq a b) (return-from type-and a))
(if (eq a t) (return-from type-and b))
(if (eq b t) (return-from type-and a))
(multiple-value-bind (typ sure)
(subtypep a b)
sure
(cond (typ (return-from type-and a))))
(multiple-value-bind (typ sure)
(subtypep b a)
sure
(cond (typ (return-from type-and b))))
t)
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