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;;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: C -*-
;;;;
;;;; CMPTOP -- Compiler top-level.
;;;; Copyright (c) 1984, Taiichi Yuasa and Masami Hagiya.
;;;; Copyright (c) 1990, Giuseppe Attardi.
;;;;
;;;; This program is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Library General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 2 of the License, or (at your option) any later version.
;;;;
;;;; See file '../Copyright' for full details.
(in-package "COMPILER")
(defun t1expr (form)
(let* ((*current-toplevel-form* nil)
(*cmp-env* (if *cmp-env*
(cmp-env-copy *cmp-env*)
(cmp-env-root))))
(push (t1expr* form) *top-level-forms*)))
(defvar *toplevel-forms-to-print*
'(defun defmacro defvar defparameter defclass defmethod defgeneric))
(defun t1expr* (form &aux
(*current-toplevel-form* (list* form *current-toplevel-form*))
(*current-form* form)
(*first-error* t)
(*setjmps* 0))
(when (consp form)
(let ((fun (car form)) (args (cdr form)) fd)
(when (member fun *toplevel-forms-to-print*)
(print-current-form))
(cond
((consp fun) (t1ordinary form))
((not (symbolp fun))
(cmperr "~s is illegal function." fun))
((eq fun 'QUOTE)
(t1ordinary 'NIL))
((setq fd (gethash fun *t1-dispatch-table*))
(funcall fd args))
((gethash fun *c1-dispatch-table*)
(t1ordinary form))
((and (setq fd (compiler-macro-function fun))
(inline-possible fun)
(let ((success nil))
(multiple-value-setq (fd success)
(cmp-expand-macro fd form))
success))
(push 'macroexpand *current-toplevel-form*)
(t1expr* fd))
((setq fd (cmp-macro-function fun))
(push 'macroexpand *current-toplevel-form*)
(t1expr* (cmp-expand-macro fd form)))
(t (t1ordinary form))
))))
(defun t1/c1expr (form)
(cond ((not *compile-toplevel*)
(c1expr form))
((atom form)
(t1ordinary form))
(t
(t1expr* form))))
(defun t2expr (form)
(when form
(let* ((def (gethash (c1form-name form) *t2-dispatch-table*)))
(if def
(let ((*compile-file-truename* (c1form-file form))
(*compile-file-position* (c1form-file-position form))
(*current-toplevel-form* (c1form-form form))
(*current-form* (c1form-form form))
(*cmp-env* (c1form-env form)))
(apply def form (c1form-args form)))
(cmperr "Unhandled T2FORM found at the toplevel:~%~4I~A"
form)))))
(defvar *emitted-local-funs* nil)
#+nil
(defun emit-local-funs ()
;; Local functions and closure functions
(do ()
((eq *local-funs* *emitted-local-funs*))
(let ((to-be-emitted (ldiff *local-funs* *emitted-local-funs*)))
(setf *emitted-local-funs* *local-funs*)
(mapc #'t3local-fun (nreverse to-be-emitted)))))
(defun emit-local-funs ()
;; Local functions and closure functions
(do ((*compile-time-too* nil)
(*compile-toplevel* nil))
;; repeat until t3local-fun generates no more
((eq *emitted-local-funs* *local-funs*))
;; scan *local-funs* backwards
(do ((lfs *local-funs* (cdr lfs)))
((eq (cdr lfs) *emitted-local-funs*)
(setq *emitted-local-funs* lfs)
(locally (declare (notinline t3local-fun))
;; so disassemble can redefine it
(t3local-fun (first lfs)))))))
(defun ctop-write (name h-pathname data-pathname
&aux def top-output-string
(*volatile* " volatile "))
(setq *top-level-forms* (nreverse *top-level-forms*))
(wt-nl "#include \"" (brief-namestring h-pathname) "\"")
;; VV might be needed by functions in CLINES.
(wt-nl-h "#ifdef ECL_DYNAMIC_VV")
(wt-nl-h "static cl_object *VV;")
(wt-nl-h "#else")
(wt-nl-h "static cl_object VV[VM];")
(wt-nl-h "#endif")
(output-clines *compiler-output2*)
(wt-nl-h "#ifdef __cplusplus")
(wt-nl-h "extern \"C\" {")
(wt-nl-h "#endif")
;;; Initialization function.
(let* ((*opened-c-braces* 0)
(*aux-closure* nil)
(c-output-file *compiler-output1*)
(*compiler-output1* (make-string-output-stream))
(*emitted-local-funs* nil)
(*compiler-declared-globals* (make-hash-table)))
(wt-nl "#include \"" (brief-namestring data-pathname) "\"")
(wt-nl "#ifdef __cplusplus")
(wt-nl "extern \"C\"")
(wt-nl "#endif")
(wt-nl "ECL_DLLEXPORT void " name "(cl_object flag)")
(wt-nl-open-brace)
(wt-nl "const cl_env_ptr cl_env_copy = ecl_process_env();")
(wt-nl "cl_object value0;")
(wt-nl "cl_object *VVtemp;")
(wt-nl "if (flag != OBJNULL){")
(wt-nl "Cblock = flag;")
(wt-nl "#ifndef ECL_DYNAMIC_VV")
(wt-nl "flag->cblock.data = VV;")
(wt-nl "#endif")
(when *self-destructing-fasl*
(wt-nl "flag->cblock.self_destruct=1;"))
(wt-nl "flag->cblock.data_size = VM;")
(wt-nl "flag->cblock.temp_data_size = VMtemp;")
(when (or *compile-in-constants* si::*compiler-constants*)
(wt-nl "flag->cblock.data_text = compiler_data_text;")
(wt-nl "flag->cblock.data_text_size = compiler_data_text_size;"))
(wt-nl "flag->cblock.cfuns_size = compiler_cfuns_size;")
(wt-nl "flag->cblock.cfuns = compiler_cfuns;")
(when ext:*source-location*
(wt-nl "flag->cblock.source = make_constant_base_string(\""
(namestring (car ext:*source-location*)) "\");"))
(wt-nl "return;}")
(wt-nl "#ifdef ECL_DYNAMIC_VV")
(wt-nl "VV = Cblock->cblock.data;")
(wt-nl "#endif")
;; With this we ensure creating a constant with the tag
;; and the initialization file
(wt-nl "Cblock->cblock.data_text = \"" (init-name-tag name) "\";")
(wt-nl "VVtemp = Cblock->cblock.temp_data;")
(wt-nl "ECL_DEFINE_SETF_FUNCTIONS")
;; Type propagation phase
(when *do-type-propagation*
(setq *compiler-phase* 'p1propagate)
(dolist (form *top-level-forms*)
(when form
(p1propagate form nil)))
(dolist (fun *local-funs*)
(p1propagate (fun-lambda fun) nil)))
(setq *compiler-phase* 't2)
(loop for form in (nconc (reverse *make-forms*) *top-level-forms*)
do (emit-toplevel-form form c-output-file))
(wt-nl-close-many-braces 0)
(setq top-output-string (get-output-stream-string *compiler-output1*)))
;; Declarations in h-file.
(wt-nl-h "static cl_object Cblock;")
(let ((num-objects (data-size)))
(if (zerop num-objects)
(progn
(wt-nl-h "#undef ECL_DYNAMIC_VV")
(wt-nl-h "#define compiler_data_text \"\"")
(wt-nl-h "#define compiler_data_text_size 0")
(wt-nl-h "#define VM 0")
(wt-nl-h "#define VMtemp 0")
(wt-nl-h "#define VV NULL"))
(progn
(wt-nl-h "#define VM " (data-permanent-storage-size))
(wt-nl-h "#define VMtemp " (data-temporary-storage-size)))))
(dolist (l *linking-calls*)
(let* ((c-name (fourth l))
(var-name (fifth l)))
(wt-nl-h "static cl_object " c-name "(cl_narg, ...);")
(wt-nl-h "static cl_object (*" var-name ")(cl_narg, ...)=" c-name ";")))
;;; Global entries for directly called functions.
(dolist (x *global-entries*)
(apply 'wt-global-entry x))
;;; Initial functions for linking calls.
(dolist (l *linking-calls*)
(let* ((var-name (fifth l))
(c-name (fourth l))
(lisp-name (third l)))
(wt-nl "static cl_object " c-name "(cl_narg narg, ...)"
"{TRAMPOLINK(narg," lisp-name ",&" var-name ",Cblock);}")))
#+(or)
(wt-nl-h "static cl_object ECL_SETF_DEFINITION(cl_object setf_vv, cl_object setf_form)
{
cl_object f1 = ecl_fdefinition(setf_form);
cl_object f2 = ECL_CONS_CAR(setf_vv);
if (f1 != f2) {
FEundefined_function(setf_form);
}
return f2;
}
")
(wt-nl-h "#define ECL_DEFINE_SETF_FUNCTIONS ")
(loop for (name setf-vv name-vv) in *setf-definitions*
do (wt-h #\\ #\Newline setf-vv "=ecl_setf_definition(" name-vv ",ECL_T);"))
(wt-nl-h "#ifdef __cplusplus")
(wt-nl-h "}")
(wt-nl-h "#endif")
(when (and (listp *static-constants*)
(setf *static-constants* (nreverse *static-constants*)))
(wt-nl-h "/*")
(wt-nl-h " * Statically defined constants")
(wt-nl-h " */")
(loop for (value name builder) in (reverse *static-constants*)
do (terpri *compiler-output2*)
do (funcall builder name value *compiler-output2*)))
(output-cfuns *compiler-output2*)
(setq *compiler-phase* 't3)
;;; Callbacks
(when *callbacks*
(wt-nl-h "#include <ecl/internal.h>")
(dolist (x *callbacks*)
(apply #'t3-defcallback x)))
(wt-nl top-output-string))
(defun emit-toplevel-form (form c-output-file)
(let ((*ihs-used-p* nil)
(*max-lex* 0)
(*max-env* 0)
(*max-temp* 0)
(*lcl* 0)
(*lex* 0)
(*env* 0)
(*level* 0)
(*temp* 0)
(*compile-to-linking-call* nil)
(*compile-file-truename* (and form (c1form-file form)))
(*compile-file-position* (and form (c1form-file-position form))))
(let ((body (with-output-to-string (*compiler-output1*)
(t2expr form))))
(if (or (plusp *max-lex*)
(plusp *max-temp*)
(plusp *max-env*)
*ihs-used-p*)
(progn
(wt-nl-open-brace)
(wt-function-locals)
(write-sequence body *compiler-output1*)
(wt-nl-close-brace))
(write-sequence body *compiler-output1*)))
(let ((*compiler-output1* c-output-file))
(emit-local-funs))))
(defun c1eval-when (args)
(check-args-number 'EVAL-WHEN args 1)
(let ((load-flag nil)
(compile-flag nil)
(execute-flag nil))
(dolist (situation (car args))
(case situation
((LOAD :LOAD-TOPLEVEL) (setq load-flag t))
((COMPILE :COMPILE-TOPLEVEL) (setq compile-flag t))
((EVAL :EXECUTE)
(if *compile-toplevel*
(setq compile-flag (or *compile-time-too* compile-flag))
(setq execute-flag t)))
(otherwise (cmperr "The EVAL-WHEN situation ~s is illegal."
situation))))
(cond ((not *compile-toplevel*)
(c1progn (and execute-flag (rest args))))
(load-flag
(let ((*compile-time-too* compile-flag))
(c1progn (rest args))))
(compile-flag
(cmp-eval (cons 'PROGN (rest args)))
(c1progn 'NIL))
(t
(c1progn 'NIL)))))
(defun t2compiler-let (c1form symbols values body)
(declare (ignore c1form))
(progv symbols values (c2expr body)))
(defun t2progn (c1form args)
(declare (ignore c1form))
(mapc #'t2expr args))
(defun exported-fname (name)
(let (cname)
(if (and (symbolp name) (setf cname (get-sysprop name 'Lfun)))
(values cname t)
(values (next-cfun "L~D~A" name) nil))))
;;; Mechanism for sharing code:
;;; FIXME! Revise this 'DEFUN stuff.
(defun new-defun (new &optional no-entry)
#|
(unless (fun-exported new)
;; Check whether this function is similar to a previous one and
;; share code with it.
(dolist (old *global-funs*)
(when (similar (fun-lambda new) (fun-lambda old))
(cmpnote "Sharing code among functions ~A and ~A"
(fun-name new) (fun-name old))
(setf (fun-shares-with new) old
(fun-cfun new) (fun-cfun old)
(fun-minarg new) (fun-minarg old)
(fun-maxarg new) (fun-maxarg old))
(return))))
|#
(push new *global-funs*))
(defun print-function (x)
(format t "~%<a FUN: ~A, CLOSURE: ~A, LEVEL: ~A, ENV: ~A>"
(fun-name x) (fun-closure x) (fun-level x) (fun-env x)))
(defmacro and! (&body body)
`(let ((l (list ,@body)))
(pprint (list* 'l? l))
(every #'identity l)))
#|
(defun similar (x y)
(let ((*processed* (make-hash-table :test #'equal)))
;; FIXME! This could be more accurate
(labels ((similar (x y)
(when (eql x y)
(return-from similar t))
(let ((pair (cons x y)))
(case (gethash pair *processed* :not-found)
((nil) (return-from similar nil))
((t) (return-from similar t))
((:ongoing) (return-from similar t))
((:not-found)))
(setf (gethash pair *processed*) :ongoing)
(setf (gethash pair *processed*)
(and (eql (type-of x) (type-of y))
(typecase x
(CONS (and (similar (car x) (car y))
(similar (cdr x) (cdr y))))
(VAR (similar-var x y))
(FUN (similar-fun x y))
(REF (similar-ref x y))
(TAG NIL)
(BLK NIL)
(C1FORM (similar-c1form x y))
(SEQUENCE (and (every #'similar x y)))
(T (equal x y)))))))
(similar-list (x y)
(null (set-difference x y)))
(similar-ref (x y)
(and (equal (ref-ref-ccb x) (ref-ref-ccb y))
(equal (ref-ref-clb x) (ref-ref-clb y))
(equal (ref-ref x) (ref-ref y))))
(similar-var (x y)
(and! (similar-ref x y)
(equal (var-name x) (var-name y))
(equal (var-kind x) (var-kind y))
(equal (var-loc x) (var-loc y))
(equal (var-type x) (var-type y))
(equal (var-index x) (var-index y))))
(similar-c1form (x y)
(and (equal (c1form-name x) (c1form-name y))
(similar (c1form-args x) (c1form-args y))
(similar (c1form-local-vars x) (c1form-local-vars y))
(eql (c1form-sp-change x) (c1form-sp-change y))
(eql (c1form-volatile x) (c1form-volatile y))))
(similar-fun (x y)
(and! (similar-ref x y)
(eql (fun-global x) (fun-global y))
(eql (fun-exported x) (fun-exported y))
(eql (fun-closure x) (fun-closure y))
(similar (fun-var x) (fun-var y))
(similar (fun-lambda x) (fun-lambda y))
(= (fun-level x) (fun-level y))
(= (fun-env x) (fun-env y))
(= (fun-minarg x) (fun-minarg y))
(eql (fun-maxarg x) (fun-maxarg y))
(every #'similar (fun-local-vars x) (fun-local-vars y))
(every #'similar (fun-referenced-vars x) (fun-referenced-vars y))
(every #'similar (fun-referenced-funs x) (fun-referenced-funs y))
(every #'similar (fun-child-funs x) (fun-child-funs y)))))
(similar x y))))
|#
(defun wt-function-locals (&optional closure-type)
;; FIXME! Are we careful enough with temporary variables that
;; we need not make them volatile?
(when (plusp *max-temp*)
(wt-nl "cl_object ")
(dotimes (i *max-temp*)
(wt "T" i)
(unless (= (1+ i) *max-temp*) (wt ", ")))
(wt ";"))
(when *ihs-used-p*
(wt-nl "struct ecl_ihs_frame ihs;")
(wt-nl "const cl_object _ecl_debug_env = ECL_NIL;"))
;; There should be no need to mark lex as volatile, since we
;; are going to pass pointers of this array around and the compiler
;; should definitely keep this in memory.
(when (plusp *max-lex*)
(wt-nl "volatile cl_object lex" *level* "[" *max-lex* "];"))
(when (plusp *max-env*)
(unless (eq closure-type 'CLOSURE)
(wt-nl "cl_object " *volatile* "env0;"))
;; Note that the closure structure has to be marked volatile
;; or else GCC may optimize away writes into it because it
;; does not know it shared with the rest of the world.
(when *aux-closure*
(wt-nl "volatile struct ecl_cclosure aux_closure;"))
(wt-nl "cl_object " *volatile*)
(dotimes (i *max-env*)
(wt "CLV" i)
(unless (= (1+ i) *max-env*) (wt ", ")))
(wt-nl ";")))
(defun wt-global-entry (fname cfun arg-types return-type)
(when (and (symbolp fname) (get-sysprop fname 'NO-GLOBAL-ENTRY))
(return-from wt-global-entry nil))
(wt-comment-nl "global entry for the function ~a" fname)
(wt-nl "static cl_object L" cfun "(cl_narg narg")
(wt-nl-h "static cl_object L" cfun "(cl_narg")
(do ((vl arg-types (cdr vl))
(lcl (1+ *lcl*) (1+ lcl)))
((endp vl) (wt1 ")"))
(declare (fixnum lcl))
(wt1 ", cl_object ") (wt-lcl lcl)
(wt-h ", cl_object"))
(wt-h1 ");")
(wt-nl-open-brace)
(when (compiler-check-args)
(wt-nl "_ecl_check_narg(" (length arg-types) ");"))
(wt-nl "cl_env_copy->nvalues = 1;")
(wt-nl "return " (case return-type
(FIXNUM "ecl_make_fixnum")
(CHARACTER "CODE_CHAR")
(DOUBLE-FLOAT "ecl_make_double_float")
(SINGLE-FLOAT "ecl_make_single_float")
#+long-float
(LONG-FLOAT "ecl_make_long_float")
(otherwise ""))
"(LI" cfun "(")
(do ((types arg-types (cdr types))
(n 1 (1+ n)))
((endp types))
(declare (fixnum n))
(wt (case (car types)
(FIXNUM "fix")
(CHARACTER "ecl_char_code")
(DOUBLE-FLOAT "df")
(SINGLE-FLOAT "sf")
#+long-float
(LONG-FLOAT "ecl_long_float")
(otherwise "")) "(")
(wt-lcl n) (wt ")")
(unless (endp (cdr types)) (wt ",")))
(wt "));")
(wt-nl-close-many-braces 0))
(defun rep-type (type)
(case type
(FIXNUM "cl_fixnum ")
(CHARACTER "unsigned char ")
(SINGLE-FLOAT "float ")
(DOUBLE-FLOAT "double ")
(otherwise "cl_object ")))
(defun t1ordinary (form)
(when *compile-time-too* (cmp-eval form))
(let ((*compile-toplevel* nil)
(*compile-time-too* nil))
(add-load-time-values (make-c1form* 'ORDINARY :args (c1expr form)))))
(defun p1ordinary (c1form assumptions form)
(p1propagate form assumptions))
(defun t2ordinary (c1form form)
(declare (ignore c1form))
(let* ((*exit* (next-label))
(*unwind-exit* (list *exit*))
(*destination* 'TRASH))
(c2expr form)
(wt-label *exit*)))
(defun add-load-time-values (form)
(let ((previous (append (and (consp *load-time-values*)
(nreverse *load-time-values*))
(nreverse *make-forms*))))
(when previous
(setf *load-time-values* nil
*make-forms* nil)
(setf form (make-c1form* 'PROGN :args (nconc previous (list form))))))
form)
(defun t1defmacro (args)
(check-args-number 'LOAD-TIME-VALUE args 2)
(destructuring-bind (name lambda-list &rest body)
args
(multiple-value-bind (function pprint doc-string)
(sys::expand-defmacro name lambda-list body)
(let ((fn (cmp-eval function *cmp-env*)))
(cmp-env-register-global-macro name fn))
(t1expr* (macroexpand `(DEFMACRO ,@args))))))
(defun c1load-time-value (args)
(check-args-number 'LOAD-TIME-VALUE args 1 2)
(let ((form (first args))
loc)
(cond ((not (listp *load-time-values*))
;; When using COMPILE, we set *load-time-values* to 'VALUES and
;; thus signal that we do not want to compile these forms, but
;; just to retain their value.
(return-from c1load-time-value (c1constant-value (cmp-eval form) :always t)))
((typep form '(or list symbol))
(setf loc (data-empty-loc))
(push (make-c1form* 'LOAD-TIME-VALUE :args loc (c1expr form))
*load-time-values*))
(t
(setf loc (add-object (cmp-eval form)))))
(make-c1form* 'LOCATION :type t :args loc)))
(defun t2load-time-value (c1form vv-loc form)
(declare (ignore c1form))
(let* ((*exit* (next-label)) (*unwind-exit* (list *exit*))
(*destination* vv-loc))
(c2expr form)
(wt-label *exit*)))
(defun t2make-form (c1form vv-loc form)
(declare (ignore c1form))
(let* ((*exit* (next-label)) (*unwind-exit* (list *exit*))
(*destination* vv-loc))
(c2expr form)
(wt-label *exit*)))
(defun t2init-form (c1form vv-loc form)
(declare (ignore c1form))
(let* ((*exit* (next-label)) (*unwind-exit* (list *exit*))
(*destination* 'TRASH))
(c2expr form)
(wt-label *exit*)))
(defun parse-cvspecs (x &aux (cvspecs nil))
(dolist (cvs x (nreverse cvspecs))
(cond ((symbolp cvs)
(push (list :OBJECT (string-downcase (symbol-name cvs))) cvspecs))
((stringp cvs) (push (list :OBJECT cvs) cvspecs))
((and (consp cvs)
(member (car cvs) '(OBJECT CHAR INT FLOAT DOUBLE)))
(dolist (name (cdr cvs))
(push (list (car cvs)
(cond ((symbolp name)
(string-downcase (symbol-name name)))
((stringp name) name)
(t (cmperr "The C variable name ~s is illegal."
name))))
cvspecs)))
(t (cmperr "The C variable specification ~s is illegal." cvs))))
)
(defun locative-type-from-var-kind (kind)
(cdr (assoc kind
'((:object . "_ecl_object_loc")
(:fixnum . "_ecl_fixnum_loc")
(:char . "_ecl_base_char_loc")
(:float . "_ecl_float_loc")
(:double . "_ecl_double_loc")
#+sse2 (:int-sse-pack . "_ecl_int_sse_pack_loc")
#+sse2 (:float-sse-pack . "_ecl_float_sse_pack_loc")
#+sse2 (:double-sse-pack . "_ecl_double_sse_pack_loc")
((special global closure lexical) . NIL)))))
(defun build-debug-lexical-env (var-locations &optional first)
#-:msvc ;; FIXME! Problem with initialization of statically defined vectors
(let* ((filtered-locations '())
(filtered-codes '()))
;; Filter out variables that we know how to store in the
;; debug information table. This excludes among other things
;; closures and special variables.
(loop for var in var-locations
for name = (let ((*package* (find-package "KEYWORD")))
(format nil "\"~S\"" (var-name var)))
for code = (locative-type-from-var-kind (var-kind var))
for loc = (var-loc var)
when (and code (consp loc) (eq (first loc) 'LCL))
do (progn
(push (cons name code) filtered-codes)
(push loc filtered-locations)))
;; Generate two tables, a static one with information about the
;; variables, including name and type, and dynamic one, which is
;; a vector of pointer to the variables.
(when filtered-codes
(setf *ihs-used-p* t)
(wt-nl "static const struct ecl_var_debug_info _ecl_descriptors[]={")
(loop for (name . code) in filtered-codes
for i from 0
do (wt-nl (if (zerop i) "{" ",{") name "," code "}"))
(wt "};")
(wt-nl "const cl_index _ecl_debug_info_raw[]={")
(wt-nl (if first "(cl_index)(ECL_NIL)," "(cl_index)(_ecl_debug_env),")
"(cl_index)(_ecl_descriptors)")
(loop for var-loc in filtered-locations
do (wt ",(cl_index)(&" var-loc ")"))
(wt "};")
(wt-nl "ecl_def_ct_vector(_ecl_debug_env,ecl_aet_index,_ecl_debug_info_raw,"
(+ 2 (length filtered-locations))
",,);")
(unless first
(wt-nl "ihs.lex_env = _ecl_debug_env;")))
filtered-codes))
(defun pop-debug-lexical-env ()
(wt-nl "ihs.lex_env = _ecl_debug_env;"))
(defun t3local-fun (fun)
(declare (type fun fun))
;; Compiler note about compiling this function
(print-emitting fun)
(let* ((lambda-expr (fun-lambda fun))
(*cmp-env* (c1form-env lambda-expr))
(*lcl* 0) (*temp* 0) (*max-temp* 0)
(*last-label* 0)
(*lex* 0) (*max-lex* 0)
(*env* (fun-env fun)) ; continue growing env
(*max-env* *env*) (*env-lvl* 0)
(*aux-closure* nil)
(*level* (fun-lexical-levels fun))
(*exit* 'RETURN)
(*unwind-exit* '(RETURN))
(*destination* 'RETURN)
(*ihs-used-p* nil)
(*opened-c-braces* 0)
(*tail-recursion-info* fun)
(*volatile* (c1form-volatile* lambda-expr)))
;; Function declaration. Returns NIL if this function needs no body.
(when (t3local-fun-declaration fun)
(wt-nl-open-brace)
(let ((body (t3local-fun-body fun)))
(wt-function-locals (fun-closure fun))
(wt-nl "const cl_env_ptr cl_env_copy = ecl_process_env();")
(when (eq (fun-closure fun) 'CLOSURE)
(wt "cl_object " *volatile* "env0 = cl_env_copy->function->cclosure.env;"))
(wt-nl *volatile* "cl_object value0;")
(when (policy-check-stack-overflow)
(wt-nl "ecl_cs_check(cl_env_copy,value0);"))
(when (eq (fun-closure fun) 'CLOSURE)
(t3local-fun-closure-scan fun))
(write-sequence body *compiler-output1*)
(wt-nl-close-many-braces 0)))))
(defun t3local-fun-body (fun)
(let ((string (make-array 2048 :element-type 'base-char
:adjustable t
:fill-pointer 0)))
(with-output-to-string (*compiler-output1* string)
(let ((lambda-expr (fun-lambda fun)))
(c2lambda-expr (c1form-arg 0 lambda-expr)
(c1form-arg 2 lambda-expr)
(fun-cfun fun)
(fun-name fun)
(fun-needs-narg fun)
(fun-required-lcls fun)
(fun-closure fun))))
string))
(defun t3local-fun-declaration (fun)
(declare (type fun fun))
(wt-comment-nl (cond ((fun-global fun) "function definition for ~a")
((eq (fun-closure fun) 'CLOSURE) "closure ~a")
(t "local function ~a"))
(or (fun-name fun) (fun-description fun) 'CLOSURE))
(when (fun-shares-with fun)
(wt-comment-nl "... shares definition with ~a" (fun-name (fun-shares-with fun)))
(return-from t3local-fun-declaration nil))
(let* ((comma "")
(lambda-expr (fun-lambda fun))
(volatile (c1form-volatile* lambda-expr))
(lambda-list (c1form-arg 0 lambda-expr))
(requireds (mapcar #'(lambda (v) (next-lcl (var-name v)))
(car lambda-list)))
(narg (fun-needs-narg fun)))
(let ((cmp-env (c1form-env lambda-expr)))
(wt-comment-nl "optimize speed ~D, debug ~D, space ~D, safety ~D "
(cmp-env-optimization 'speed cmp-env)
(cmp-env-optimization 'debug cmp-env)
(cmp-env-optimization 'space cmp-env)
(cmp-env-optimization 'safety cmp-env)))
(let ((cfun (fun-cfun fun)))
(cond ((fun-exported fun)
(wt-nl-h "ECL_DLLEXPORT cl_object " cfun "(")
(wt-nl "cl_object " cfun "("))
(t
(wt-nl-h "static cl_object " cfun "(")
(wt-nl "static cl_object " cfun "("))))
(when narg
(wt-h volatile "cl_narg")
(wt volatile "cl_narg narg")
(setf comma ", "))
(dotimes (n (fun-lexical-levels fun))
(wt-h comma "volatile cl_object *")
(wt comma "volatile cl_object *lex" n)
(setf comma ", "))
(loop for lcl in (setf (fun-required-lcls fun) requireds)
do (wt-h comma "cl_object " volatile)
(wt comma "cl_object " volatile lcl)
(setf comma ", "))
(when narg
(wt-h ", ...")
(wt ", ..."))
(wt-h ");")
(wt ")"))
t)
(defun fun-closure-variables (fun)
(sort (remove-if
#'(lambda (x)
(or
;; non closure variable
(not (ref-ref-ccb x))
;; special variable
(eq (var-kind x) 'special)
;; not actually referenced
(and (not (var-referenced-in-form x (fun-lambda fun)))
(not (var-changed-in-form x (fun-lambda fun))))
;; parameter of this closure
;; (not yet bound, therefore var-loc is OBJECT)
(eq (var-loc x) 'OBJECT)))
(fun-referenced-vars fun))
#'>
:key #'var-loc))
(defun fun-lexical-levels (fun)
(if (eq (fun-closure fun) 'LEXICAL)
(fun-level fun)
0))
(defun t3local-fun-closure-scan (fun)
(let ((clv-used (fun-closure-variables fun)))
(wt-nl "/* Scanning closure data ... */")
(do ((n (1- (fun-env fun)) (1- n))
(bs clv-used)
(first t))
((or (minusp n) (null bs)))
(wt-nl "CLV" n)
(if first
(progn (wt " = env0;") (setf first nil))
(wt " = _ecl_cdr(CLV" (1+ n) ");"))
(when (= n (var-loc (first bs)))
(wt-comment (var-name (first clv-used)))
(pop clv-used)))
(wt-nl-open-brace)
(wt " /* ... closure scanning finished */")))
;;; ----------------------------------------------------------------------
;;; Optimizer for FSET. Removes the need for a special handling of DEFUN as a
;;; toplevel form and also allows optimizing calls to DEFUN or DEFMACRO which
;;; are not toplevel, but which create no closures.
;;;
;;; The idea is as follows: when the function or macro to be defined is not a
;;; closure, we can use the auxiliary C functions c_def_c_*() instead of
;;; creating a closure and invoking si_fset(). However until the C2 phase of
;;; the compiler we do not know whether a function is a closure, hence the need
;;; for a c2fset.
;;;
;;; We optimize (SYS:FSET #'(LAMBDA ...) ..) and also, accidentally,
;;; (SYS:FSET (FLET ((FOO ...)) #'FOO) ...) which is to what LAMBDA gets
;;; translated in c1function.
;;;
(defun c1fset (args)
(destructuring-bind (fname def &optional (macro nil) (pprint nil))
args
(let* ((fun-form (c1expr def)))
(when (eq (c1form-name fun-form) 'LOCALS)
(let* ((function-list (c1form-arg 0 fun-form))
(fun-object (pop function-list))
(form (c1form-arg 1 fun-form))
(labels (c1form-arg 2 fun-form)))
(when (and
;; Only 1 function
(null function-list)
;; Not closed over anything
(every #'global-var-p (fun-referenced-vars fun-object))
;; Referencing the function variable
(eq (c1form-name form) 'VAR)
(eq (c1form-arg 0 form)
(fun-var fun-object)))
(when (fun-no-entry fun-object)
(when macro
(cmperr "Declaration C-LOCAL used in macro ~a"
(fun-name fun-object)))
(return-from c1fset
(make-c1form* 'SI:FSET :args fun-object nil nil nil nil)))
(when (and (typep macro 'boolean)
(typep pprint '(or integer null))
(consp fname)
(eq (first fname) 'quote))
(return-from c1fset
(make-c1form* 'SI:FSET :args
fun-object ;; Function object
(add-object (second fname) :permanent t :duplicate t)
macro
pprint
;; The c1form, when we do not optimize
(list (c1expr fname)
fun-form
(c1expr macro)
(c1expr pprint)))))))))
(c1call-global 'SI:FSET (list fname def macro pprint))))
(defun p1fset (c1form assumptions fun fname macro pprint c1forms)
(p1propagate (fun-lambda fun) assumptions))
(defun c2fset (c1form fun fname macro pprint c1forms)
(when (fun-no-entry fun)
(wt-nl "(void)0; /* No entry created for "
(format nil "~A" (fun-name fun))
" */")
;; FIXME! Look at C2LOCALS!
(new-local fun)
(return-from c2fset))
(unless (and (not (fun-closure fun))
(eq *destination* 'TRASH))
(return-from c2fset
(c2call-global c1form 'SI:FSET c1forms)))
(let ((*inline-blocks* 0)
(loc (data-empty-loc)))
(push (list loc fname fun) *global-cfuns-array*)
;; FIXME! Look at C2LOCALS!
(new-local fun)
(wt-nl (if macro "ecl_cmp_defmacro(" "ecl_cmp_defun(")
loc ");")
(wt-comment (loc-immediate-value fname))
(close-inline-blocks)))
(defun output-cfuns (stream)
(let ((n-cfuns (length *global-cfuns-array*)))
(wt-nl-h "/*")
(wt-nl-h " * Exported Lisp functions")
(wt-nl-h " */")
(wt-nl-h "#define compiler_cfuns_size " n-cfuns)
(if (zerop n-cfuns)
(wt-nl-h "#define compiler_cfuns NULL")
(progn
(format stream "~%static const struct ecl_cfun compiler_cfuns[] = {~
~%~t/*t,m,narg,padding,name,block,entry*/");
(loop for (loc fname-loc fun) in (nreverse *global-cfuns-array*)
do (let* ((cfun (fun-cfun fun))
(minarg (fun-minarg fun))
(maxarg (fun-maxarg fun))
(narg (if (and (= minarg maxarg)
(<= maxarg si:c-arguments-limit))
maxarg
-1)))
(format stream "~%{0,0,~D,0,ecl_make_fixnum(~D),ecl_make_fixnum(~D),(cl_objectfn)~A,ECL_NIL,ecl_make_fixnum(~D)},"
narg
(vv-location loc)
(vv-location fname-loc)
cfun (fun-file-position fun))))
(format stream "~%};")))))