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support.scm
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support.scm
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;;;; support.scm - Miscellaneous support code for the CHICKEN compiler
;
; Copyright (c) 2008-2011, The Chicken Team
; Copyright (c) 2000-2007, Felix L. Winkelmann
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
; conditions are met:
;
; Redistributions of source code must retain the above copyright notice, this list of conditions and the following
; disclaimer.
; Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
; disclaimer in the documentation and/or other materials provided with the distribution.
; Neither the name of the author nor the names of its contributors may be used to endorse or promote
; products derived from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
; AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
; OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
; POSSIBILITY OF SUCH DAMAGE.
(declare
(unit support))
(include "compiler-namespace")
(include "tweaks")
(include "banner")
(declare
(not inline compiler-cleanup-hook ##sys#user-read-hook) )
;;; Debugging and error-handling stuff:
(define (compiler-cleanup-hook) #f)
(define debugging-chicken '())
(define disabled-warnings '()) ; usage type load var const syntax redef use call ffi
(define (bomb . msg-and-args)
(if (pair? msg-and-args)
(apply error (string-append "[internal compiler error] " (car msg-and-args)) (cdr msg-and-args))
(error "[internal compiler error]") ) )
(define (debugging mode msg . args)
(and (memq mode debugging-chicken)
(begin
(printf "~a" msg)
(if (pair? args)
(begin
(display ": ")
(for-each (lambda (x) (printf "~s " (force x))) args) ) )
(newline)
(flush-output)
#t) ) )
(define (quit msg . args)
(let ([out (current-error-port)])
(apply fprintf out (string-append "\nError: " msg) args)
(newline out)
(exit 1) ) )
(set! ##sys#syntax-error-hook
(lambda (msg . args)
(let ((out (current-error-port))
(loc (and (symbol? msg)
(let ((loc msg))
(set! msg (car args))
(set! args (cdr args))
loc))))
(if loc
(fprintf out "\nSyntax error (~a): ~a~%~%" loc msg)
(fprintf out "\nSyntax error: ~a~%~%" msg) )
(for-each (cut fprintf out "\t~s~%" <>) args)
(print-call-chain out 0 ##sys#current-thread "\n\tExpansion history:\n")
(exit 70) ) ) )
(set! syntax-error ##sys#syntax-error-hook)
(define (emit-syntax-trace-info info cntr)
(##core#inline "C_emit_syntax_trace_info" info cntr ##sys#current-thread) )
(define (map-llist proc llist)
(let loop ([llist llist])
(cond [(null? llist) '()]
[(symbol? llist) (proc llist)]
[else (cons (proc (car llist)) (loop (cdr llist)))] ) ) )
(define (check-signature var args llist)
(define (err)
(quit "Arguments to inlined call of `~A' do not match parameter-list ~A"
(real-name var)
(map-llist real-name (cdr llist)) ) )
(let loop ([as args] [ll llist])
(cond [(null? ll) (unless (null? as) (err))]
[(symbol? ll)]
[(null? as) (err)]
[else (loop (cdr as) (cdr ll))] ) ) )
;;; Generic utility routines:
(define (posq x lst)
(let loop ([lst lst] [i 0])
(cond [(null? lst) #f]
[(eq? x (car lst)) i]
[else (loop (cdr lst) (add1 i))] ) ) )
(define (stringify x)
(cond ((string? x) x)
((symbol? x) (symbol->string x))
(else (sprintf "~a" x)) ) )
(define (symbolify x)
(cond ((symbol? x) x)
((string? x) (string->symbol x))
(else (string->symbol (sprintf "~a" x))) ) )
(define (build-lambda-list vars argc rest)
(let loop ((vars vars) (n argc))
(cond ((or (zero? n) (null? vars)) (or rest '()))
(else (cons (car vars) (loop (cdr vars) (sub1 n)))) ) ) )
(define string->c-identifier ##sys#string->c-identifier)
(define (c-ify-string str)
(list->string
(cons
#\"
(let loop ((chars (string->list str)))
(if (null? chars)
'(#\")
(let* ((c (car chars))
(code (char->integer c)) )
(if (or (< code 32) (>= code 127) (memq c '(#\" #\' #\\ #\?)))
(append '(#\\)
(cond ((< code 8) '(#\0 #\0))
((< code 64) '(#\0))
(else '()) )
(string->list (number->string code 8))
(loop (cdr chars)) )
(cons c (loop (cdr chars))) ) ) ) ) ) ) )
(define (valid-c-identifier? name)
(let ([str (string->list (->string name))])
(and (pair? str)
(let ([c0 (car str)])
(and (or (char-alphabetic? c0) (char=? #\_ c0))
(any (lambda (c) (or (char-alphabetic? c) (char-numeric? c) (char=? #\_ c)))
(cdr str) ) ) ) ) ) )
(eval-when (load)
(define words (foreign-lambda int "C_bytestowords" int))
(define words->bytes (foreign-lambda int "C_wordstobytes" int)) )
(eval-when (eval)
(define (words n)
(let ([wordsize (##sys#fudge 7)])
(+ (quotient n wordsize) (if (zero? (modulo n wordsize)) 0 1)) ) )
(define (words->bytes n)
(* n (##sys#fudge 7)) ) )
(define (check-and-open-input-file fname . line)
(cond [(string=? fname "-") (current-input-port)]
[(file-exists? fname) (open-input-file fname)]
[(or (null? line) (not (car line))) (quit "Can not open file ~s" fname)]
[else (quit "(~a) can not open file ~s" (car line) fname)] ) )
(define (close-checked-input-file port fname)
(unless (string=? fname "-") (close-input-port port)) )
(define (fold-inner proc lst)
(if (null? (cdr lst))
lst
(let fold ((xs (reverse lst)))
(apply
proc
(if (null? (cddr xs))
(list (cadr xs) (car xs))
(list (fold (cdr xs)) (car xs)) ) ) ) ) )
(define (follow-without-loop seed proc abort)
(let loop ([x seed] [done '()])
(if (member x done)
(abort)
(proc x (lambda (x2) (loop x2 (cons x done)))) ) ) )
(define (sort-symbols lst)
(sort lst (lambda (s1 s2) (string<? (symbol->string s1) (symbol->string s2)))))
;;; Predicates on expressions and literals:
(define (constant? x)
(or (number? x)
(char? x)
(string? x)
(boolean? x)
(eof-object? x)
(and (pair? x) (eq? 'quote (car x))) ) )
(define (collapsable-literal? x)
(or (boolean? x)
(char? x)
(eof-object? x)
(number? x)
(symbol? x) ) )
(define (immediate? x)
(or (and (fixnum? x) (not (big-fixnum? x))) ; 64-bit fixnums would result in platform-dependent .c files
(eq? (##core#undefined) x)
(null? x)
(eof-object? x)
(char? x)
(boolean? x) ) )
(define (basic-literal? x)
(or (null? x)
(symbol? x)
(constant? x)
(and (vector? x) (every basic-literal? (vector->list x)))
(and (pair? x)
(basic-literal? (car x))
(basic-literal? (cdr x)) ) ) )
;;; Expression manipulation:
(define (canonicalize-begin-body body)
(let loop ((xs body))
(cond ((null? xs) '(##core#undefined))
((null? (cdr xs)) (car xs))
((let ([h (car xs)])
(or (equal? h '(##core#undefined))
(constant? h)
(equal? h '(##sys#void)) ) )
(loop (cdr xs)) )
(else `(let ((,(gensym 't) ,(car xs)))
,(loop (cdr xs))) ) ) ) )
(define string->expr
(let ([exn? (condition-predicate 'exn)]
[exn-msg (condition-property-accessor 'exn 'message)] )
(lambda (str)
(handle-exceptions ex
(quit "cannot parse expression: ~s [~a]~%"
str
(if (exn? ex)
(exn-msg ex)
(->string ex) ) )
(let ([xs (with-input-from-string
str
(lambda () (unfold eof-object? values (lambda (x) (read)) (read))))])
(cond [(null? xs) '(##core#undefined)]
[(null? (cdr xs)) (car xs)]
[else `(begin ,@xs)] ) ) ) ) ) )
(define decompose-lambda-list ##sys#decompose-lambda-list)
(define (llist-length llist)
(##core#inline "C_u_i_length" llist)) ; stops at non-pair node
(define (llist-match? llist args) ; assumes #!optional/#!rest/#!key have been expanded
(let loop ((llist llist) (args args))
(cond ((null? llist) (null? args))
((symbol? llist))
((null? args) (atom? llist))
(else (loop (cdr llist) (cdr args))))))
;;; Profiling instrumentation:
(define (expand-profile-lambda name llist body)
(let ([index profile-lambda-index]
[args (gensym)] )
(set! profile-lambda-list (alist-cons index name profile-lambda-list))
(set! profile-lambda-index (add1 index))
`(##core#lambda ,args
(##sys#dynamic-wind
(##core#lambda () (##sys#profile-entry ',index ,profile-info-vector-name))
(##core#lambda () (##sys#apply (##core#lambda ,llist ,body) ,args))
(##core#lambda () (##sys#profile-exit ',index ,profile-info-vector-name)) ) ) ) )
;;; Database operations:
;
; - 'get' and 'put' shadow the routines in the extras-unit, we use low-level
; symbol-keyed hash-tables here.
; - does currently nothing after the first invocation, but we leave it
; this way to have the option to add default entries for each new db.
(define initialize-analysis-database
(let ((initial #t))
(lambda ()
(when initial
(for-each
(lambda (s)
(mark-variable s '##compiler#intrinsic 'standard)
(when (memq s foldable-bindings)
(mark-variable s '##compiler#foldable #t)))
standard-bindings)
(for-each
(lambda (s)
(mark-variable s '##compiler#intrinsic 'extended)
(when (memq s foldable-bindings)
(mark-variable s '##compiler#foldable #t)))
extended-bindings)
(for-each
(lambda (s)
(mark-variable s '##compiler#intrinsic 'internal))
internal-bindings))
(set! initial #f))))
(define (get db key prop)
(let ((plist (##sys#hash-table-ref db key)))
(and plist
(let ([a (assq prop plist)])
(and a (##sys#slot a 1)) ) ) ) )
(define (get-all db key . props)
(let ((plist (##sys#hash-table-ref db key)))
(if plist
(filter-map (lambda (prop) (assq prop plist)) props)
'() ) ) )
(define (put! db key prop val)
(let ([plist (##sys#hash-table-ref db key)])
(if plist
(let ([a (assq prop plist)])
(cond [a (##sys#setslot a 1 val)]
[val (##sys#setslot plist 1 (alist-cons prop val (##sys#slot plist 1)))] ) )
(when val (##sys#hash-table-set! db key (list (cons prop val)))) ) ) )
(define (collect! db key prop val)
(let ((plist (##sys#hash-table-ref db key)))
(if plist
(let ([a (assq prop plist)])
(cond [a (##sys#setslot a 1 (cons val (##sys#slot a 1)))]
[else (##sys#setslot plist 1 (alist-cons prop (list val) (##sys#slot plist 1)))] ) )
(##sys#hash-table-set! db key (list (list prop val)))) ) )
(define (count! db key prop . val)
(let ([plist (##sys#hash-table-ref db key)]
[n (if (pair? val) (car val) 1)] )
(if plist
(let ([a (assq prop plist)])
(cond [a (##sys#setslot a 1 (+ (##sys#slot a 1) n))]
[else (##sys#setslot plist 1 (alist-cons prop n (##sys#slot plist 1)))] ) )
(##sys#hash-table-set! db key (list (cons prop val)))) ) )
(define (get-list db key prop) ; returns '() if not set
(let ((x (get db key prop)))
(or x '())))
;;; Line-number database management:
(define (get-line exp)
(get ##sys#line-number-database (car exp) exp) )
(define (get-line-2 exp)
(let* ((name (car exp))
(lst (##sys#hash-table-ref ##sys#line-number-database name)) )
(cond ((and lst (assq exp (cdr lst)))
=> (lambda (a) (values (car lst) (cdr a))) )
(else (values name #f)) ) ) )
(define (find-lambda-container id cid db)
(let loop ([id id])
(or (eq? id cid)
(let ([c (get db id 'contained-in)])
(and c (loop c)) ) ) ) )
(define (display-line-number-database)
(##sys#hash-table-for-each
(lambda (key val)
(when val (printf "~S ~S~%" key (map cdr val))) )
##sys#line-number-database) )
;;; Display analysis database:
(define display-analysis-database
(let ((names '((captured . cpt) (assigned . set) (boxed . box) (global . glo)
(assigned-locally . stl)
(contractable . con) (standard-binding . stb) (simple . sim)
(inlinable . inl)
(collapsable . col) (removable . rem) (constant . con)
(inline-target . ilt) (inline-transient . itr)
(undefined . und) (replacing . rpg) (unused . uud) (extended-binding . xtb)
(inline-export . ilx) (hidden-refs . hrf)
(customizable . cst) (has-unused-parameters . hup) (boxed-rest . bxr) ) )
(omit #f))
(lambda (db)
(unless omit
(set! omit
(append default-standard-bindings
default-extended-bindings
internal-bindings) ) )
(##sys#hash-table-for-each
(lambda (sym plist)
(let ([val #f]
(lval #f)
[pval #f]
[csites '()]
[refs '()] )
(unless (memq sym omit)
(write sym)
(let loop ((es plist))
(if (pair? es)
(begin
(case (caar es)
((captured assigned boxed global contractable standard-binding assigned-locally
collapsable removable undefined replacing unused simple inlinable inline-export
has-unused-parameters extended-binding customizable constant boxed-rest hidden-refs)
(printf "\t~a" (cdr (assq (caar es) names))) )
((unknown)
(set! val 'unknown) )
((value)
(unless (eq? val 'unknown) (set! val (cdar es))) )
((local-value)
(unless (eq? val 'unknown) (set! lval (cdar es))) )
((potential-value)
(set! pval (cdar es)) )
((replacable home contains contained-in use-expr closure-size rest-parameter
captured-variables explicit-rest)
(printf "\t~a=~s" (caar es) (cdar es)) )
((references)
(set! refs (cdar es)) )
((call-sites)
(set! csites (cdar es)) )
(else (bomb "Illegal property" (car es))) )
(loop (cdr es)) ) ) )
(cond [(and val (not (eq? val 'unknown)))
(printf "\tval=~s" (cons (node-class val) (node-parameters val))) ]
[(and lval (not (eq? val 'unknown)))
(printf "\tlval=~s" (cons (node-class lval) (node-parameters lval))) ]
[(and pval (not (eq? val 'unknown)))
(printf "\tpval=~s" (cons (node-class pval) (node-parameters pval)))] )
(when (pair? refs) (printf "\trefs=~s" (length refs)))
(when (pair? csites) (printf "\tcss=~s" (length csites)))
(newline) ) ) )
db) ) ) )
;;; Node creation and -manipulation:
;; Note: much of this stuff will be overridden by the inline-definitions in "tweaks.scm".
(define-record-type node
(make-node class parameters subexpressions)
node?
(class node-class node-class-set!) ; symbol
(parameters node-parameters node-parameters-set!) ; (value...)
(subexpressions node-subexpressions node-subexpressions-set!)) ; (node...)
(define-record-printer (node n out)
(fprintf out "#<node ~a>" (node-class n)))
(define (make-node c p s)
(##sys#make-structure 'node c p s) ) ; this kludge is for allowing the inlined `make-node'
(define (varnode var) (make-node '##core#variable (list var) '()))
(define (qnode const) (make-node 'quote (list const) '()))
(define (build-node-graph exp)
(let ([count 0])
(define (walk x)
(cond ((symbol? x) (varnode x))
((not-pair? x) (bomb "bad expression" x))
((symbol? (car x))
(case (car x)
((##core#global-ref) (make-node '##core#global-ref (list (cadr x)) '()))
((if ##core#undefined) (make-node (car x) '() (map walk (cdr x))))
((quote)
(let ((c (cadr x)))
(qnode (if (and (number? c)
(eq? 'fixnum number-type)
(not (integer? c)) )
(begin
(warning
"literal is out of range - will be truncated to integer" c)
(inexact->exact (truncate c)) )
c) ) ) )
((let)
(let ([bs (cadr x)]
[body (caddr x)] )
(if (null? bs)
(walk body)
(make-node 'let (unzip1 bs)
(append (map (lambda (b) (walk (cadr b))) (cadr x))
(list (walk body)) ) ) ) ) )
((lambda ##core#lambda)
(make-node 'lambda (list (cadr x)) (list (walk (caddr x)))))
((##core#primitive)
(let ([arg (cadr x)])
(make-node
(car x)
(list (if (and (pair? arg) (eq? 'quote (car arg))) (cadr arg) arg))
(map walk (cddr x)) ) ) )
((##core#inline ##core#callunit)
(make-node (car x) (list (cadr x)) (map walk (cddr x))) )
((##core#proc)
(make-node '##core#proc (list (cadr x) #t) '()) )
((set! ##core#set!)
(make-node
'set! (list (cadr x))
(map walk (cddr x))))
((##core#foreign-callback-wrapper)
(let ([name (cadr (second x))])
(make-node
'##core#foreign-callback-wrapper
(list name (cadr (third x)) (cadr (fourth x)) (cadr (fifth x)))
(list (walk (sixth x))) ) ) )
((##core#inline_allocate ##core#inline_ref ##core#inline_update
##core#inline_loc_ref ##core#inline_loc_update)
(make-node (first x) (second x) (map walk (cddr x))) )
((##core#app)
(make-node '##core#call '(#t) (map walk (cdr x))) )
(else
(receive (name ln) (get-line-2 x)
(make-node
'##core#call
(list (cond [(variable-mark name '##compiler#always-bound-to-procedure)
(set! count (add1 count))
#t]
[else #f] )
(if ln
(let ([rn (real-name name)])
(list ln
(or rn (##sys#symbol->qualified-string name))) )
(##sys#symbol->qualified-string name) ) )
(map walk x) ) ) ) ) )
(else (make-node '##core#call '(#f) (map walk x))) ) )
(let ([exp2 (walk exp)])
(when (positive? count)
(debugging 'o "eliminated procedure checks" count))
exp2) ) )
(define (build-expression-tree node)
(let walk ((n node))
(let ((subs (node-subexpressions n))
(params (node-parameters n))
(class (node-class n)) )
(case class
((if ##core#box ##core#cond) (cons class (map walk subs)))
((##core#closure)
`(##core#closure ,params ,@(map walk subs)) )
((##core#variable ##core#global-ref) (car params))
((quote) `(quote ,(car params)))
((let)
`(let ,(map list params (map walk (butlast subs)))
,(walk (last subs)) ) )
((##core#lambda)
(list (if (second params)
'lambda
'##core#lambda)
(third params)
(walk (car subs)) ) )
((##core#call) (map walk subs))
((##core#callunit) (cons* '##core#callunit (car params) (map walk subs)))
((##core#undefined) (list class))
((##core#bind)
(let loop ((n (car params)) (vals subs) (bindings '()))
(if (zero? n)
`(##core#bind ,(reverse bindings) ,(walk (car vals)))
(loop (- n 1) (cdr vals) (cons (walk (car vals)) bindings)) ) ) )
((##core#unbox ##core#ref ##core#update ##core#update_i)
(cons* class (walk (car subs)) params (map walk (cdr subs))) )
((##core#inline_allocate ##core#let_unboxed)
(cons* class params (map walk subs)))
(else (cons class (append params (map walk subs)))) ) ) ) )
(define (fold-boolean proc lst)
(let fold ([vars lst])
(if (null? (cddr vars))
(apply proc vars)
(make-node
'##core#inline '("C_and")
(list (proc (first vars) (second vars))
(fold (cdr vars)) ) ) ) ) )
(define (inline-lambda-bindings llist args body copy? db cfk)
(decompose-lambda-list
llist
(lambda (vars argc rest)
(receive (largs rargs) (split-at args argc)
(let* ([rlist (if copy? (map gensym vars) vars)]
[body (if copy?
(copy-node-tree-and-rename body vars rlist db cfk)
body) ] )
(fold-right
(lambda (var val body) (make-node 'let (list var) (list val body)) )
(if rest
(make-node
'let (list (last rlist))
(list (if (null? rargs)
(qnode '())
(make-node
'##core#inline_allocate
(list "C_a_i_list" (* 3 (length rargs)))
rargs) )
body) )
body)
(take rlist argc)
largs) ) ) ) ) )
(define (copy-node-tree-and-rename node vars aliases db cfk)
(let ([rlist (map cons vars aliases)])
(define (rename v rl) (alist-ref v rl eq? v))
(define (walk n rl)
(let ([subs (node-subexpressions n)]
[params (node-parameters n)]
[class (node-class n)] )
(case class
((quote)
(make-node class params '()))
[(##core#variable)
(let ((var (first params)))
(when (get db var 'contractable)
(cfk var))
(varnode (rename var rl))) ]
[(set!)
(make-node
'set! (list (rename (first params) rl))
(list (walk (first subs) rl)) ) ]
[(let)
(let* ((v (first params))
(val1 (walk (first subs) rl))
(a (gensym v))
(rl2 (alist-cons v a rl)) )
(make-node
'let (list a)
(list val1 (walk (second subs) rl2)))) ]
[(##core#lambda)
(decompose-lambda-list
(third params)
(lambda (vars argc rest)
(let* ((as (map (lambda (v)
(let ((a (gensym v)))
(put! db v 'inline-transient #t)
a))
vars) )
(rl2 (append (map cons vars as) rl)) )
(make-node
'##core#lambda
(list (gensym 'f) (second params) ; new function-id
(build-lambda-list as argc (and rest (rename rest rl2)))
(fourth params) )
(map (cut walk <> rl2) subs) ) ) ) ) ]
[else (make-node class (tree-copy params) (map (cut walk <> rl) subs))] ) ) )
(walk node rlist) ) )
(define (tree-copy t)
(let rec ([t t])
(if (pair? t)
(cons (rec (car t)) (rec (cdr t)))
t) ) )
(define (copy-node! from to)
(node-class-set! to (node-class from))
(node-parameters-set! to (node-parameters from))
(node-subexpressions-set! to (node-subexpressions from))
to)
(define (node->sexpr n)
(let walk ((n n))
`(,(node-class n)
,(node-parameters n)
,@(map walk (node-subexpressions n)))))
(define (sexpr->node x)
(let walk ((x x))
(make-node (car x) (cadr x) (map walk (cddr x)))))
(define (emit-global-inline-file filename db)
(let ((lst '())
(out '()))
(##sys#hash-table-for-each
(lambda (sym plist)
(when (variable-visible? sym)
(and-let* ((val (assq 'local-value plist))
((not (node? (variable-mark sym '##compiler#inline-global))))
((let ((val (assq 'value plist)))
(or (not val)
(not (eq? 'unknown (cdr val))))))
((assq 'inlinable plist))
(lparams (node-parameters (cdr val)))
((not (get db sym 'hidden-refs)))
((case (variable-mark sym '##compiler#inline)
((yes) #t)
((no) #f)
(else
(< (fourth lparams) inline-max-size) ) ) ) )
(set! lst (cons sym lst))
(set! out (cons (list sym (node->sexpr (cdr val))) out)))))
db)
(if (null? out)
(delete-file* filename)
(with-output-to-file filename
(lambda ()
(print "; GENERATED BY CHICKEN " (chicken-version) " FROM "
source-filename "\n")
(for-each
(lambda (x)
(pp x)
(newline))
(reverse out))
(print "; END OF FILE"))))
(when (and (pair? lst)
(debugging 'i "the following procedures can be globally inlined:"))
(for-each (cut print " " <>) (sort-symbols lst)))))
(define (load-inline-file fname)
(with-input-from-file fname
(lambda ()
(let loop ()
(let ((x (read)))
(unless (eof-object? x)
(mark-variable
(car x)
'##compiler#inline-global
(sexpr->node (cadr x)))
(loop)))))))
;;; Match node-structure with pattern:
(define (match-node node pat vars)
(let ((env '()))
(define (resolve v x)
(cond ((assq v env) => (lambda (a) (equal? x (cdr a))))
((memq v vars)
(set! env (alist-cons v x env))
#t)
(else (eq? v x)) ) )
(define (match1 x p)
(cond ((not-pair? p) (resolve p x))
((not-pair? x) #f)
((match1 (car x) (car p)) (match1 (cdr x) (cdr p)))
(else #f) ) )
(define (matchn n p)
(if (not-pair? p)
(resolve p n)
(and (eq? (node-class n) (first p))
(match1 (node-parameters n) (second p))
(let loop ((ns (node-subexpressions n))
(ps (cddr p)) )
(cond ((null? ps) (null? ns))
((not-pair? ps) (resolve ps ns))
((null? ns) #f)
(else (and (matchn (car ns) (car ps))
(loop (cdr ns) (cdr ps)) ) ) ) ) ) ) )
(let ((r (matchn node pat)))
(and r
(begin
(debugging 'a "matched" (node-class node) (node-parameters node) pat)
env) ) ) ) )
;;; Test nodes for certain properties:
(define (expression-has-side-effects? node db)
(let walk ([n node])
(let ([subs (node-subexpressions n)])
(case (node-class n)
[(##core#variable quote ##core#undefined ##core#proc ##core#global-ref) #f]
[(##core#lambda)
(let ([id (first (node-parameters n))])
(find (lambda (fs)
(eq? id (foreign-callback-stub-id fs)))
foreign-callback-stubs) ) ]
[(if let) (any walk subs)]
[else #t] ) ) ) )
(define (simple-lambda-node? node)
(let* ([params (node-parameters node)]
[llist (third params)]
[k (and (pair? llist) (first llist))] ) ; leaf-routine has no continuation argument
(and k
(second params)
(let rec ([n node])
(case (node-class n)
[(##core#call)
(let* ([subs (node-subexpressions n)]
[f (first subs)] )
(and (eq? '##core#variable (node-class f))
(eq? k (first (node-parameters f)))
(every rec (cdr subs)) ) ) ]
[(##core#callunit) #f]
[else (every rec (node-subexpressions n))] ) ) ) ) )
;;; Some safety checks and database dumping:
(define (dump-undefined-globals db)
(##sys#hash-table-for-each
(lambda (sym plist)
(when (and (not (keyword? sym))
(assq 'global plist)
(not (assq 'assigned plist)) )
(write sym)
(newline) ) )
db) )
(define (dump-defined-globals db)
(##sys#hash-table-for-each
(lambda (sym plist)
(when (and (not (keyword? sym))
(assq 'global plist)
(assq 'assigned plist))
(write sym)
(newline) ) )
db) )
(define (dump-global-refs db)
(##sys#hash-table-for-each
(lambda (sym plist)
(when (and (not (keyword? sym)) (assq 'global plist))
(let ((a (assq 'references plist)))
(write (list sym (if a (length (cdr a)) 0)))
(newline) ) ) )
db) )
;;; change hook function to hide non-exported module bindings
(set! ##sys#toplevel-definition-hook
(lambda (sym mod exp val)
(when (and (not val) (not exp))
(debugging 'o "hiding nonexported module bindings" sym)
(hide-variable sym))))
;;; Compute general statistics from analysis database:
;
; - Returns:
;
; current-program-size
; original-program-size
; number of known variables
; number of known procedures
; number of global variables
; number of known call-sites
; number of database entries
; average bucket load
(define (compute-database-statistics db)
(let ((nprocs 0)
(nvars 0)
(nglobs 0)
(entries 0)
(nsites 0) )
(##sys#hash-table-for-each
(lambda (sym plist)
(for-each
(lambda (prop)
(set! entries (+ entries 1))
(case (car prop)
((global) (set! nglobs (+ nglobs 1)))
((value)
(set! nvars (+ nvars 1))
(if (eq? '##core#lambda (node-class (cdr prop)))
(set! nprocs (+ nprocs 1)) ) )
((call-sites) (set! nsites (+ nsites (length (cdr prop))))) ) )
plist) )
db)
(values current-program-size
original-program-size
nvars
nprocs
nglobs
nsites
entries) ) )
(define (print-program-statistics db)
(receive
(size osize kvars kprocs globs sites entries) (compute-database-statistics db)
(when (debugging 's "program statistics:")
(printf "; program size: \t~s \toriginal program size: \t~s\n" size osize)
(printf "; variables with known values: \t~s\n" kvars)
(printf "; known procedures: \t~s\n" kprocs)
(printf "; global variables: \t~s\n" globs)
(printf "; known call sites: \t~s\n" sites)
(printf "; database entries: \t~s\n" entries) ) ) )
;;; Pretty-print expressions:
(define (pprint-expressions-to-file exps filename)
(let ([port (if filename (open-output-file filename) (current-output-port))])
(with-output-to-port port
(lambda ()
(for-each
(lambda (x)
(pretty-print x)
(newline) )
exps) ) )
(when filename (close-output-port port)) ) )
;;; Create foreign type checking expression:
(define foreign-type-check
(let ((tmap '((nonnull-u8vector . u8vector) (nonnull-u16vector . u16vector)
(nonnull-s8vector . s8vector) (nonnull-s16vector . s16vector)
(nonnull-u32vector . u32vector) (nonnull-s32vector . s32vector)
(nonnull-f32vector . f32vector) (nonnull-f64vector . f64vector))))
(lambda (param type)
(follow-without-loop
type
(lambda (t next)
(let repeat ([t t])
(case t
[(char unsigned-char) (if unsafe param `(##sys#foreign-char-argument ,param))]
[(int unsigned-int short unsigned-short byte unsigned-byte int32 unsigned-int32)
(if unsafe param `(##sys#foreign-fixnum-argument ,param))]
[(float double number) (if unsafe param `(##sys#foreign-flonum-argument ,param))]
[(blob scheme-pointer)
(let ([tmp (gensym)])
`(let ([,tmp ,param])
(if ,tmp
,(if unsafe
tmp
`(##sys#foreign-block-argument ,tmp) )
'#f) ) ) ]
[(nonnull-scheme-pointer nonnull-blob)
(if unsafe
param
`(##sys#foreign-block-argument ,param) ) ]
((pointer-vector)
(let ([tmp (gensym)])
`(let ([,tmp ,param])
(if ,tmp
,(if unsafe
tmp
`(##sys#foreign-struct-wrapper-argument 'pointer-vector ,tmp) )
'#f) ) ) )
((nonnull-pointer-vector)
(if unsafe
param
`(##sys#foreign-struct-wrapper-argument 'pointer-vector ,param) ) )
[(u8vector u16vector s8vector s16vector u32vector s32vector f32vector f64vector)
(let ([tmp (gensym)])
`(let ([,tmp ,param])
(if ,tmp
,(if unsafe
tmp
`(##sys#foreign-struct-wrapper-argument ',t ,tmp) )
'#f) ) ) ]
[(nonnull-u8vector nonnull-u16vector nonnull-s8vector nonnull-s16vector nonnull-u32vector nonnull-s32vector
nonnull-f32vector nonnull-f64vector)
(if unsafe
param
`(##sys#foreign-struct-wrapper-argument
',(##sys#slot (assq t tmap) 1)
,param) ) ]
[(integer long size_t integer32)
(if unsafe param `(##sys#foreign-integer-argument ,param))]
[(integer64)
(if unsafe param `(##sys#foreign-integer64-argument ,param))]
[(unsigned-integer unsigned-integer32 unsigned-long)
(if unsafe
param
`(##sys#foreign-unsigned-integer-argument ,param) ) ]
[(unsigned-integer32)
(if unsafe
param
`(##sys#foreign-unsigned-integer64-argument ,param) ) ]
[(c-pointer c-string-list c-string-list*)
(let ([tmp (gensym)])
`(let ([,tmp ,param])
(if ,tmp
(##sys#foreign-pointer-argument ,tmp)
'#f) ) ) ]
[(nonnull-c-pointer)
`(##sys#foreign-pointer-argument ,param) ]
[(c-string c-string* unsigned-c-string unsigned-c-string*)
(let ([tmp (gensym)])
`(let ([,tmp ,param])
(if ,tmp
,(if unsafe
`(##sys#make-c-string ,tmp)
`(##sys#make-c-string (##sys#foreign-string-argument ,tmp)) )
'#f) ) ) ]
[(nonnull-c-string nonnull-c-string* nonnull-unsigned-c-string*)
(if unsafe
`(##sys#make-c-string ,param)
`(##sys#make-c-string (##sys#foreign-string-argument ,param)) ) ]