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compiler.scm
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;;;; compiler.scm - The CHICKEN Scheme compiler
;
;
; "This is insane. What we clearly want to do is not exactly clear, and is rooted in NCOMPLR."
;
;
;--------------------------------------------------------------------------------------------
; Copyright (c) 2008-2014, 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.
;
;
; Supported syntax:
;
; - Declaration specifiers:
;
; ([not] extended-bindings {<name>})
; ([not] inline {<var>})
; ([not] interrupts-enabled)
; ([not] safe)
; ([not] standard-bindings {<name>})
; ([not] usual-integrations {<name>})
; (local {<name> ...})
; ([not] inline-global {<name>})
; ([number-type] <type>)
; (always-bound {<name>})
; (block)
; (block-global {<name>})
; (bound-to-procedure {<var>})
; (compile-syntax)
; (disable-interrupts)
; (emit-import-library {<module> | (<module> <filename>)})
; (export {<name>})
; (fixnum-arithmetic)
; (foreign-declare {<string>})
; (hide {<name>})
; (inline-limit <limit>)
; (keep-shadowed-macros)
; (no-argc-checks)
; (no-bound-checks)
; (no-procedure-checks)
; (no-procedure-checks-for-usual-bindings)
; (no-procedure-checks-for-toplevel-bindings)
; (profile <symbol> ...)
; (safe-globals)
; (separate)
; (type (<symbol> <typespec>) ...)
; (unit <unitname>)
; (unsafe)
; (unused <symbol> ...)
; (uses {<unitname>})
; (strict-types)
; (specialize)
; (enforce-argument-types [<symbol> ...])
;
; <type> = fixnum | generic
; - Global symbol properties:
;
; ##compiler#always-bound -> BOOL
; ##compiler#always-bound-to-procedure -> BOOL
; ##compiler#local -> BOOL
; ##compiler#visibility -> #f | 'hidden | 'exported
; ##compiler#constant -> BOOL defined as constant
; ##compiler#intrinsic -> #f | 'standard | 'extended
; ##compiler#inline -> 'no | 'yes
; ##compiler#inline-global -> 'yes | 'no | <node>
; ##compiler#profile -> BOOL
; ##compiler#unused -> BOOL
; ##compiler#foldable -> BOOL
; ##compiler#pure -> BOOL referentially transparent
; ##compiler#clean -> BOOL does not modify local state
; ##compiler#type -> TYPE
; ##compiler#declared-type -> BOOL
; - Source language:
;
; <variable>
; <constant>
; (##core#declare {<spec>})
; (##core#immutable <exp>)
; (##core#quote <exp>)
; (##core#syntax <exp>)
; (##core#if <exp> <exp> [<exp>])
; (##core#let <variable> ({(<variable> <exp>)}) <body>)
; (##core#let ({(<variable> <exp>)}) <body>)
; (##core#letrec ({(<variable> <exp>)}) <body>)
; (##core#letrec* ({(<variable> <exp>)}) <body>)
; (##core#let-location <symbol> <type> [<init>] <exp>)
; (##core#lambda <variable> <body>)
; (##core#lambda ({<variable>}+ [. <variable>]) <body>)
; (##core#set! <variable> <exp>)
; (##core#begin <exp> ...)
; (##core#toplevel-begin <exp> ...)
; (##core#include <string>)
; (##core#loop-lambda <llist> <body>)
; (##core#undefined)
; (##core#primitive <name>)
; (##core#inline {<op>} <exp>)
; (##core#inline_allocate (<op> <words>) {<exp>})
; (##core#inline_ref (<name> <type>))
; (##core#inline_update (<name> <type>) <exp>)
; (##core#inline_loc_ref (<type>) <exp>)
; (##core#inline_loc_update (<type>) <exp> <exp>)
; (##core#compiletimetoo <exp>)
; (##core#compiletimeonly <exp>)
; (##core#elaborationtimetoo <exp>)
; (##core#elaborationtimeonly <exp>)
; (##core#define-foreign-variable <symbol> <type> [<string>])
; (##core#define-foreign-type <symbol> <type> [<proc1> [<proc2>]])
; (##core#foreign-lambda <type> <string> {<type>})
; (##core#foreign-lambda* <type> ({(<type> <var>)})) {<string>})
; (##core#foreign-safe-lambda <type> <string> {<type>})
; (##core#foreign-safe-lambda* <type> ({(<type> <var>)})) {<string>})
; (##core#foreign-primitive <type> ({(<type> <var>)}) {<string>})
; (##core#define-inline <name> <exp>)
; (##core#define-constant <name> <exp*>)
; (##core#foreign-callback-wrapper '<name> <qualifiers> '<type> '({<type>}) <exp>)
; (##core#define-external-variable <name> <type> <bool> [<symbol>])
; (##core#check <exp>)
; (##core#require-for-syntax <exp> ...)
; (##core#require-extension (<id> ...) <bool>)
; (##core#app <exp> {<exp>})
; (##core#define-syntax <symbol> <expr>)
; (##core#define-compiler-syntax <symbol> <expr>)
; (##core#let-compiler-syntax ((<symbol> <expr>) ...) <expr> ...)
; (##core#module <symbol> #t | (<name> | (<name> ...) ...) <body>)
; (##core#let-module-alias ((<alias> <name>) ...) <body>)
; (##core#the <type> <strict?> <exp>)
; (##core#typecase <info> <exp> (<type> <body>) ... [(else <body>)])
; (<exp> {<exp>})
; - Core language:
;
; [##core#variable {<variable>}]
; [if {} <exp> <exp> <exp>)]
; [quote {<exp>}]
; [let {<variable>} <exp-v> <exp>]
; [##core#lambda {<id> <mode> (<variable>... [. <variable>]) <size>} <exp>]
; [set! {<variable>} <exp>]
; [##core#undefined {}]
; [##core#primitive {<name>}]
; [##core#inline {<op>} <exp>...]
; [##core#inline_allocate {<op> <words>} <exp>...]
; [##core#inline_ref {<name> <type>}]
; [##core#inline_update {<name> <type>} <exp>]
; [##core#inline_loc_ref {<type>} <exp>]
; [##core#inline_loc_update {<type>} <exp> <exp>]
; [##core#call {<safe-flag> [<debug-info>]} <exp-f> <exp>...]
; [##core#callunit {<unitname>} <exp>...]
; [##core#switch {<count>} <exp> <const1> <body1> ... <defaultbody>]
; [##core#cond <exp> <exp> <exp>]
; [##core#recurse {<tail-flag>} <exp1> ...]
; [##core#return <exp>]
; [##core#direct_call {<safe-flag> <debug-info> <call-id> <words>} <exp-f> <exp>...]
; [##core#direct_lambda {<id> <mode> (<variable>... [. <variable>]) <size>} <exp>]
; [##core#the {<type> <strict>} <exp>]
; [##core#the/result {<typelist>} <exp>]
; [##core#typecase {<info> (<type> ...)} <exp> <body1> ... [<elsebody>]]
; - Closure converted/prepared language:
;
; [if {} <exp> <exp> <exp>]
; [quote {<exp>}]
; [##core#bind {<count>} <exp-v>... <exp>]
; [##core#let_unboxed {<name> <utype>} <exp1> <exp2>]
; [##core#undefined {}]
; [##core#unboxed_ref {<name> [<utype>]}]
; [##core#unboxed_set! {<name> <utype>} <exp>]
; [##core#inline {<op>} <exp>...]
; [##core#inline_allocate {<op <words>} <exp>...]
; [##core#inline_ref {<name> <type>}]
; [##core#inline_update {<name> <type>} <exp>]
; [##core#inline_loc_ref {<type>} <exp>]
; [##core#inline_loc_update {<type>} <exp> <exp>]
; [##core#inline_unboxed {<op>} <exp> ...]
; [##core#closure {<count>} <exp>...]
; [##core#box {} <exp>]
; [##core#unbox {} <exp>]
; [##core#ref {<index>} <exp>]
; [##core#update {<index>} <exp> <exp>]
; [##core#updatebox {} <exp> <exp>]
; [##core#update_i {<index>} <exp> <exp>]
; [##core#updatebox_i {} <exp> <exp>]
; [##core#call {<safe-flag> [<debug-info> [<call-id> <customizable-flag>]]} <exp-f> <exp>...]
; [##core#callunit {<unitname>} <exp>...]
; [##core#cond <exp> <exp> <exp>]
; [##core#local {<index>}]
; [##core#setlocal {<index>} <exp>]
; [##core#global {<literal> <safe-flag> <block-mode> [<name>]}]
; [##core#setglobal {<literal> <block-mode> <name>} <exp>]
; [##core#setglobal_i {<literal> <block-mode> <name>} <exp>]
; [##core#literal {<literal>}]
; [##core#immediate {<type> [<immediate>]}] - type: bool/fix/nil/char
; [##core#proc {<name> [<non-internal>]}]
; [##core#recurse {<tail-flag> <call-id>} <exp1> ...]
; [##core#return <exp>]
; [##core#direct_call {<safe-flag> <debug-info> <call-id> <words>} <exp-f> <exp>...]
; Analysis database entries:
;
; <variable>:
;
; captured -> <boolean> If true: variable is used outside it's home-scope
; global -> <boolean> If true: variable does not occur in any lambda-list
; call-sites -> ((<lambda-id> <node>) ...) Known call-nodes of a named procedure
; home -> <lambda-id> Procedure which introduces this variable
; unknown -> <boolean> If true: variable cannot have a known value
; assigned -> <boolean> If true: variable is assigned somewhere
; assigned-locally -> <boolean> If true: variable has been assigned inside user lambda
; undefined -> <boolean> If true: variable is unknown yet but can be known later
; value -> <node> Variable has a known value
; local-value -> <node> Variable is declared local and has value
; potential-value -> <node> Global variable was assigned this value (used for lambda-info)
; references -> (<node> ...) Nodes that are accesses of this variable (##core#variable nodes)
; boxed -> <boolean> If true: variable has to be boxed after closure-conversion
; contractable -> <boolean> If true: variable names contractable procedure
; inlinable -> <boolean> If true: variable names potentially inlinable procedure
; collapsable -> <boolean> If true: variable refers to collapsable constant
; removable -> <boolean> If true: variable is not used
; replacable -> <variable> Variable can be replaced by another variable
; replacing -> <boolean> If true: variable can replace another variable (don't remove)
; standard-binding -> <boolean> If true: variable names a standard binding
; extended-binding -> <boolean> If true: variable names an extended binding
; unused -> <boolean> If true: variable is a formal parameter that is never used
; rest-parameter -> #f | 'list If true: variable holds rest-argument list
; constant -> <boolean> If true: variable has fixed value
; hidden-refs -> <boolean> If true: procedure that refers to hidden global variables
; inline-transient -> <boolean> If true: was introduced during inlining
;
; <lambda-id>:
;
; contains -> (<lambda-id> ...) Procedures contained in this lambda
; contained-in -> <lambda-id> Procedure containing this lambda
; has-unused-parameters -> <boolean> If true: procedure has unused formal parameters
; use-expr -> (<lambda-id> ...) Marks non-direct use-sites of common subexpression
; closure-size -> <integer> Number of free variables stored in a closure
; customizable -> <boolean> If true: all call sites are known, procedure does not escape
; simple -> <boolean> If true: procedure only calls its continuation
; explicit-rest -> <boolean> If true: procedure is called with consed rest list
; captured-variables -> (<var> ...) List of closed over variables
; inline-target -> <boolean> If true: was target of an inlining operation
(declare
(unit compiler))
(include "compiler-namespace")
(define (d arg1 . more)
(when (##sys#fudge 13) ; debug mode?
(if (null? more)
(pp arg1)
(apply print arg1 more))))
(define-syntax d (syntax-rules () ((_ . _) (void))))
(include "tweaks")
(define-inline (gensym-f-id) (gensym 'f_))
(define-foreign-variable installation-home c-string "C_INSTALL_SHARE_HOME")
(define-foreign-variable default-target-heap-size int "C_DEFAULT_TARGET_HEAP_SIZE")
(define-constant foreign-type-table-size 301)
(define-constant initial-analysis-database-size 3001)
(define-constant default-line-number-database-size 997)
(define-constant inline-table-size 301)
(define-constant constant-table-size 301)
(define-constant file-requirements-size 301)
(define-constant real-name-table-size 997)
(define-constant default-inline-max-size 20)
;;; Global variables containing compilation parameters:
(define unit-name #f)
(define number-type 'generic)
(define standard-bindings '())
(define extended-bindings '())
(define insert-timer-checks #t)
(define used-units '())
(define unsafe #f)
(define foreign-declarations '())
(define emit-trace-info #f)
(define block-compilation #f)
(define line-number-database-size default-line-number-database-size)
(define target-heap-size #f)
(define target-stack-size #f)
(define optimize-leaf-routines #f)
(define emit-profile #f)
(define no-bound-checks #f)
(define no-argc-checks #f)
(define no-procedure-checks #f)
(define no-global-procedure-checks #f)
(define source-filename #f)
(define safe-globals-flag #f)
(define explicit-use-flag #f)
(define disable-stack-overflow-checking #f)
(define require-imports-flag #f)
(define external-protos-first #f)
(define inline-max-size default-inline-max-size)
(define emit-closure-info #t)
(define undefine-shadowed-macros #t)
(define profiled-procedures #f)
(define import-libraries '())
(define all-import-libraries #f)
(define enable-module-registration #t)
(define standalone-executable #t)
(define local-definitions #f)
(define inline-locally #f)
(define enable-inline-files #f)
(define compiler-syntax-enabled #t)
(define bootstrap-mode #f)
(define strict-variable-types #f)
(define enable-specialization #f)
;;; Other global variables:
(define verbose-mode #f)
(define original-program-size #f)
(define current-program-size 0)
(define current-analysis-database-size initial-analysis-database-size)
(define line-number-database-2 #f)
(define immutable-constants '())
(define inline-table #f)
(define inline-table-used #f)
(define constant-table #f)
(define constants-used #f)
(define broken-constant-nodes '())
(define inline-substitutions-enabled #f)
(define direct-call-ids '())
(define first-analysis #t)
(define foreign-type-table #f)
(define foreign-variables '())
(define foreign-lambda-stubs '())
(define foreign-callback-stubs '())
(define external-variables '())
(define profile-lambda-list '())
(define profile-lambda-index 0)
(define profile-info-vector-name #f)
(define external-to-pointer '())
(define real-name-table #f)
(define location-pointer-map '())
(define pending-canonicalizations '())
(define defconstant-bindings '())
(define callback-names '())
(define toplevel-scope #t)
(define toplevel-lambda-id #f)
(define csc-control-file #f)
(define data-declarations '())
(define file-requirements #f)
(define postponed-initforms '())
;;; Initialize globals:
(define (initialize-compiler)
(if line-number-database-2
(vector-fill! line-number-database-2 '())
(set! line-number-database-2 (make-vector line-number-database-size '())) )
(if inline-table
(vector-fill! inline-table '())
(set! inline-table (make-vector inline-table-size '())) )
(if constant-table
(vector-fill! constant-table '())
(set! constant-table (make-vector constant-table-size '())) )
(set! profile-info-vector-name (make-random-name 'profile-info))
(set! real-name-table (make-vector real-name-table-size '()))
(if file-requirements
(vector-fill! file-requirements '())
(set! file-requirements (make-vector file-requirements-size '())) )
(if foreign-type-table
(vector-fill! foreign-type-table '())
(set! foreign-type-table (make-vector foreign-type-table-size '())) ) )
;;; Expand macros and canonicalize expressions:
(define (canonicalize-expression exp)
(let ((compiler-syntax '()))
(define (find-id id se) ; ignores macro bindings
(cond ((null? se) #f)
((and (eq? id (caar se)) (symbol? (cdar se))) (cdar se))
(else (find-id id (cdr se)))))
(define (lookup id se)
(cond ((find-id id se))
((##sys#get id '##core#macro-alias))
(else id)))
(define (macro-alias var se)
(let ((alias (gensym var)))
(##sys#put! alias '##core#macro-alias (lookup var se))
alias) )
(define (set-real-names! as ns)
(for-each (lambda (a n) (set-real-name! a n)) as ns) )
(define (write-to-string x)
(let ([out (open-output-string)])
(write x out)
(get-output-string out) ) )
(define (unquotify x se)
(if (and (list? x)
(= 2 (length x))
(symbol? (car x))
(eq? 'quote (lookup (car x) se)))
(cadr x)
x) )
(define (resolve-variable x0 e se dest ldest h)
(let ((x (lookup x0 se)))
(d `(RESOLVE-VARIABLE: ,x0 ,x ,(map (lambda (x) (car x)) se)))
(cond ((not (symbol? x)) x0) ; syntax?
[(and constants-used (##sys#hash-table-ref constant-table x))
=> (lambda (val) (walk (car val) e se dest ldest h #f)) ]
[(and inline-table-used (##sys#hash-table-ref inline-table x))
=> (lambda (val) (walk val e se dest ldest h #f)) ]
[(assq x foreign-variables)
=> (lambda (fv)
(let* ([t (second fv)]
[ft (final-foreign-type t)]
[body `(##core#inline_ref (,(third fv) ,t))] )
(walk
(foreign-type-convert-result
(finish-foreign-result ft body)
t)
e se dest ldest h #f)))]
[(assq x location-pointer-map)
=> (lambda (a)
(let* ([t (third a)]
[ft (final-foreign-type t)]
[body `(##core#inline_loc_ref (,t) ,(second a))] )
(walk
(foreign-type-convert-result
(finish-foreign-result ft body)
t)
e se dest ldest h #f))) ]
((##sys#get x '##core#primitive))
((not (memq x e)) (##sys#alias-global-hook x #f h)) ; only if global
(else x))))
(define (emit-import-lib name il)
(let* ((fname (if all-import-libraries
(string-append (symbol->string name) ".import.scm")
(cdr il)))
(imps (##sys#compiled-module-registration (##sys#current-module)))
(oldimps
(and (file-exists? fname)
(read-file fname) ) ) )
(cond ((equal? imps oldimps)
(when verbose-mode
(print "not generating import library `" fname "' for module `"
name "' because imports did not change")) )
(else
(when verbose-mode
(print "generating import library `" fname "' for module `"
name "' ..."))
(with-output-to-file fname
(lambda ()
(print ";;;; " fname " - GENERATED BY CHICKEN "
(chicken-version) " -*- Scheme -*-\n")
(for-each pretty-print imps)
(print "\n;; END OF FILE"))))) ) )
(define (walk x e se dest ldest h outer-ln)
(cond ((symbol? x)
(cond ((keyword? x) `(quote ,x))
((memq x unlikely-variables)
(warning
(sprintf "reference to variable `~s' possibly unintended" x) )))
(resolve-variable x e se dest ldest h))
((not-pair? x)
(if (constant? x)
`(quote ,x)
(##sys#syntax-error/context "illegal atomic form" x)))
((symbol? (car x))
(let ((ln (or (get-line x) outer-ln)))
(emit-syntax-trace-info x #f)
(unless (proper-list? x)
(if ln
(##sys#syntax-error/context (sprintf "(~a) - malformed expression" ln) x)
(##sys#syntax-error/context "malformed expression" x)))
(set! ##sys#syntax-error-culprit x)
(let* ((name0 (lookup (car x) se))
(name (or (and (symbol? name0) (##sys#get name0 '##core#primitive)) name0))
(xexpanded (##sys#expand x se compiler-syntax-enabled)))
(when ln (update-line-number-database! xexpanded ln))
(cond ((not (eq? x xexpanded))
(walk xexpanded e se dest ldest h ln))
[(and inline-table-used (##sys#hash-table-ref inline-table name))
=> (lambda (val)
(walk (cons val (cdr x)) e se dest ldest h ln)) ]
[else
(case name
((##core#if)
`(if
,(walk (cadr x) e se #f #f h ln)
,(walk (caddr x) e se #f #f h ln)
,(if (null? (cdddr x))
'(##core#undefined)
(walk (cadddr x) e se #f #f h ln) ) ) )
((##core#syntax ##core#quote)
`(quote ,(##sys#strip-syntax (cadr x))))
((##core#check)
(if unsafe
''#t
(walk (cadr x) e se dest ldest h ln) ) )
((##core#the)
`(##core#the
,(##sys#strip-syntax (cadr x))
,(caddr x)
,(walk (cadddr x) e se dest ldest h ln)))
((##core#typecase)
`(##core#typecase
,(or ln (cadr x))
,(walk (caddr x) e se #f #f h ln)
,@(map (lambda (cl)
(list (##sys#strip-syntax (car cl))
(walk (cadr cl) e se dest ldest h ln)))
(cdddr x))))
((##core#immutable)
(let ((c (cadadr x)))
(cond [(assoc c immutable-constants) => cdr]
[else
(let ([var (gensym 'c)])
(set! immutable-constants (alist-cons c var immutable-constants))
(mark-variable var '##compiler#always-bound)
(hide-variable var)
var) ] ) ) )
((##core#undefined ##core#callunit ##core#primitive) x)
((##core#inline_ref)
`(##core#inline_ref
(,(caadr x) ,(##sys#strip-syntax (cadadr x)))))
((##core#inline_loc_ref)
`(##core#inline_loc_ref
,(##sys#strip-syntax (cadr x))
,(walk (caddr x) e se dest ldest h ln)))
((##core#require-for-syntax)
(let ([ids (map eval (cdr x))])
(apply ##sys#require ids)
(##sys#hash-table-update!
file-requirements 'dynamic/syntax
(cut lset-union eq? <> ids)
(lambda () ids) )
'(##core#undefined) ) )
((##core#require-extension)
(let ((imp? (caddr x)))
(walk
(let loop ([ids (##sys#strip-syntax (cadr x))])
(if (null? ids)
'(##core#undefined)
(let ((id (car ids)))
(let-values (((exp f realid)
(##sys#do-the-right-thing id #t imp?)))
(unless (or f
(and (symbol? id)
(or (feature? id)
(##sys#find-extension
(##sys#canonicalize-extension-path
id 'require-extension)
#f)) ) )
(warning
(sprintf "extension `~A' is currently not installed" realid)))
`(##core#begin ,exp ,(loop (cdr ids))) ) ) ) )
e se dest ldest h ln) ) )
((##core#let)
(let* ((bindings (cadr x))
(vars (unzip1 bindings))
(aliases (map gensym vars))
(se2 (##sys#extend-se se vars aliases)))
(set-real-names! aliases vars)
`(let
,(map (lambda (alias b)
(list alias (walk (cadr b) e se (car b) #t h ln)) )
aliases bindings)
,(walk (##sys#canonicalize-body
(cddr x) se2 compiler-syntax-enabled)
(append aliases e)
se2 dest ldest h ln) ) ) )
((##core#letrec*)
(let ((bindings (cadr x))
(body (cddr x)) )
(walk
`(##core#let
,(map (lambda (b)
(list (car b) '(##core#undefined)))
bindings)
,@(map (lambda (b)
`(##core#set! ,(car b) ,(cadr b)))
bindings)
(##core#let () ,@body) )
e se dest ldest h ln)))
((##core#letrec)
(let* ((bindings (cadr x))
(vars (unzip1 bindings))
(tmps (map gensym vars))
(body (cddr x)) )
(walk
`(##core#let
,(map (lambda (b)
(list (car b) '(##core#undefined)))
bindings)
(##core#let
,(map (lambda (t b) (list t (cadr b))) tmps bindings)
,@(map (lambda (v t)
`(##core#set! ,v ,t))
vars tmps)
(##core#let () ,@body) ) )
e se dest ldest h ln)))
((##core#lambda)
(let ((llist (cadr x))
(obody (cddr x)) )
(when (##sys#extended-lambda-list? llist)
(set!-values
(llist obody)
(##sys#expand-extended-lambda-list
llist obody ##sys#error se) ) )
(decompose-lambda-list
llist
(lambda (vars argc rest)
(let* ((aliases (map gensym vars))
(se2 (##sys#extend-se se vars aliases))
(body0 (##sys#canonicalize-body
obody se2 compiler-syntax-enabled))
(body (walk body0 (append aliases e) se2 #f #f dest ln))
(llist2
(build-lambda-list
aliases argc
(and rest (list-ref aliases (posq rest vars))) ) )
(l `(##core#lambda ,llist2 ,body)) )
(set-real-names! aliases vars)
(cond ((or (not dest)
ldest
(assq dest se)) ; not global?
l)
((and emit-profile
(or (eq? profiled-procedures 'all)
(and
(eq? profiled-procedures 'some)
(variable-mark dest '##compiler#profile))))
(expand-profile-lambda
(if (memq dest e) ; should normally not be the case
e
(##sys#alias-global-hook dest #f #f))
llist2 body) )
(else l)))))))
((##core#let-syntax)
(let ((se2 (append
(map (lambda (b)
(list
(car b)
se
(##sys#ensure-transformer
(##sys#eval/meta (cadr b))
(##sys#strip-syntax (car b)))))
(cadr x) )
se) ) )
(walk
(##sys#canonicalize-body (cddr x) se2 compiler-syntax-enabled)
e se2
dest ldest h ln) ) )
((##core#letrec-syntax)
(let* ((ms (map (lambda (b)
(list
(car b)
#f
(##sys#ensure-transformer
(##sys#eval/meta (cadr b))
(##sys#strip-syntax (car b)))))
(cadr x) ) )
(se2 (append ms se)) )
(for-each
(lambda (sb)
(set-car! (cdr sb) se2) )
ms)
(walk
(##sys#canonicalize-body (cddr x) se2 compiler-syntax-enabled)
e se2 dest ldest h ln)))
((##core#define-syntax)
(##sys#check-syntax
(car x) x
(if (pair? (cadr x))
'(_ (variable . lambda-list) . #(_ 1))
'(_ variable _) )
#f se)
(let* ((var (if (pair? (cadr x)) (caadr x) (cadr x)))
(body (if (pair? (cadr x))
`(##core#lambda ,(cdadr x) ,@(cddr x))
(caddr x)))
(name (lookup var se)))
(##sys#register-syntax-export name (##sys#current-module) body)
(##sys#extend-macro-environment
name
(##sys#current-environment)
(##sys#eval/meta body))
(walk
(if ##sys#enable-runtime-macros
`(##sys#extend-macro-environment
',var
(##sys#current-environment) ,body) ;XXX possibly wrong se?
'(##core#undefined) )
e se dest ldest h ln)) )
((##core#define-compiler-syntax)
(let* ((var (cadr x))
(body (caddr x))
(name (lookup var se)))
(when body
(set! compiler-syntax
(alist-cons
name
(##sys#get name '##compiler#compiler-syntax)
compiler-syntax)))
(##sys#put!
name '##compiler#compiler-syntax
(and body
(##sys#cons
(##sys#ensure-transformer
(##sys#eval/meta body)
(##sys#strip-syntax var))
(##sys#current-environment))))
(walk
(if ##sys#enable-runtime-macros
`(##sys#put!
(##core#syntax ,name)
'##compiler#compiler-syntax
,(and body
`(##sys#cons
(##sys#ensure-transformer
,body
',var)
(##sys#current-environment))))
'(##core#undefined) )
e se dest ldest h ln)))
((##core#let-compiler-syntax)
(let ((bs (map
(lambda (b)
(##sys#check-syntax
'let-compiler-syntax b '(symbol . #(_ 0 1)))
(let ((name (lookup (car b) se)))
(list
name
(and (pair? (cdr b))
(cons (##sys#ensure-transformer
(##sys#eval/meta (cadr b))
(##sys#strip-syntax (car b)))
se))
(##sys#get name '##compiler#compiler-syntax) ) ) )
(cadr x))))
(dynamic-wind
(lambda ()
(for-each
(lambda (b)
(##sys#put! (car b) '##compiler#compiler-syntax (cadr b)))
bs) )
(lambda ()
(walk
(##sys#canonicalize-body
(cddr x) se compiler-syntax-enabled)
e se dest ldest h ln) )
(lambda ()
(for-each
(lambda (b)
(##sys#put!
(car b)
'##compiler#compiler-syntax (caddr b)))
bs) ) ) ) )
((##core#include)
(walk
`(##core#begin
,@(fluid-let ((##sys#default-read-info-hook read-info-hook))
(##sys#include-forms-from-file (cadr x))))
e se dest ldest h ln))
((##core#let-module-alias)
(##sys#with-module-aliases
(map (lambda (b)
(##sys#check-syntax 'functor b '(symbol symbol))
(##sys#strip-syntax b))
(cadr x))
(lambda ()
(walk `(##core#begin ,@(cddr x)) e se dest ldest h ln))))
((##core#module)
(let* ((name (##sys#strip-syntax (cadr x)))
(exports
(or (eq? #t (caddr x))
(map (lambda (exp)
(cond ((symbol? exp) exp)
((and (pair? exp)
(let loop ((exp exp))
(or (null? exp)
(and (symbol? (car exp))
(loop (cdr exp))))))
exp)
(else
(##sys#syntax-error-hook
'module
"invalid export syntax" exp name))))
(##sys#strip-syntax (caddr x)))))
(csyntax compiler-syntax))
(when (##sys#current-module)
(##sys#syntax-error-hook
'module "modules may not be nested" name))
(let-values (((body mreg)
(parameterize ((##sys#current-module
(##sys#register-module name exports) )
(##sys#current-environment '())
(##sys#macro-environment
##sys#initial-macro-environment)
(##sys#module-alias-environment
(##sys#module-alias-environment)))
(##sys#with-property-restore
(lambda ()
(let loop ((body (cdddr x)) (xs '()))
(cond
((null? body)
(handle-exceptions ex
(begin
;; avoid backtrace
(print-error-message ex (current-error-port))
(exit 1))
(##sys#finalize-module (##sys#current-module)))
(cond ((or all-import-libraries
(assq name import-libraries) ) =>
(lambda (il)
(when enable-module-registration
(emit-import-lib name il))
(values
(reverse xs)
'((##core#undefined)))))
((not enable-module-registration)
(values
(reverse xs)
'((##core#undefined))))
(else
(values
(reverse xs)
(if standalone-executable
'()
(##sys#compiled-module-registration
(##sys#current-module)))))))
(else
(loop
(cdr body)
(cons (walk
(car body)
e ;?
(##sys#current-environment)
#f #f h ln)
xs))))))))))
(let ((body
(canonicalize-begin-body
(append
(parameterize ((##sys#current-module #f)
(##sys#macro-environment
(##sys#meta-macro-environment)))
(map
(lambda (x)
(walk
x
e ;?
(##sys#current-meta-environment) #f #f h ln) )
mreg))
body))))
(do ((cs compiler-syntax (cdr cs)))
((eq? cs csyntax))
(##sys#put! (caar cs) '##compiler#compiler-syntax (cdar cs)))
(set! compiler-syntax csyntax)
body))))
((##core#loop-lambda) ;XXX is this really needed?
(let* ([vars (cadr x)]
[obody (cddr x)]
[aliases (map gensym vars)]
(se2 (##sys#extend-se se vars aliases))
[body
(walk
(##sys#canonicalize-body obody se2 compiler-syntax-enabled)
(append aliases e)
se2 #f #f dest ln) ] )
(set-real-names! aliases vars)
`(##core#lambda ,aliases ,body) ) )
((##core#set!)
(let* ([var0 (cadr x)]
[var (lookup var0 se)]
[ln (get-line x)]
[val (caddr x)] )
(when (memq var unlikely-variables)
(warning
(sprintf "assignment to variable `~s' possibly unintended"
var)))
(cond ((assq var foreign-variables)
=> (lambda (fv)
(let ([type (second fv)]
[tmp (gensym)] )
(walk
`(let ([,tmp ,(foreign-type-convert-argument val type)])
(##core#inline_update
(,(third fv) ,type)
,(foreign-type-check tmp type) ) )
e se #f #f h ln))))
((assq var location-pointer-map)
=> (lambda (a)
(let* ([type (third a)]
[tmp (gensym)] )
(walk
`(let ([,tmp ,(foreign-type-convert-argument val type)])
(##core#inline_loc_update
(,type)
,(second a)
,(foreign-type-check tmp type) ) )
e se #f #f h ln))))
(else
(unless (memq var e) ; global?
(set! var (or (##sys#get var '##core#primitive)
(##sys#alias-global-hook var #t dest)))
(when safe-globals-flag
(mark-variable var '##compiler#always-bound-to-procedure)
(mark-variable var '##compiler#always-bound)))
(cond ((##sys#macro? var)
(warning
(sprintf "assigned global variable `~S' is syntax ~A"
var
(if ln (sprintf "(~a)" ln) "") ))
(when undefine-shadowed-macros (##sys#undefine-macro! var) ) )
((and ##sys#notices-enabled
(assq var (##sys#current-environment)))
(##sys#notice "assignment to imported value binding" var)))
(when (keyword? var)
(warning (sprintf "assignment to keyword `~S'" var) ))
`(set! ,var ,(walk val e se var0 (memq var e) h ln))))))
((##core#inline)
`(##core#inline
,(unquotify (cadr x) se) ,@(mapwalk (cddr x) e se h ln)))
((##core#inline_allocate)
`(##core#inline_allocate
,(map (cut unquotify <> se) (second x))
,@(mapwalk (cddr x) e se h ln)))
((##core#inline_update)
`(##core#inline_update ,(cadr x) ,(walk (caddr x) e se #f #f h ln)) )
((##core#inline_loc_update)
`(##core#inline_loc_update
,(cadr x)
,(walk (caddr x) e se #f #f h ln)
,(walk (cadddr x) e se #f #f h ln)) )