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;;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: C -*-
;;;;
;;;; Copyright (c) 2009, Juan Jose Garcia-Ripoll.
;;;;
;;;; 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 "C-BACKEND")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; C/C++ BACKEND
;;;
(defvar *c-opened-blocks* 0)
(defun c2driver (forms)
(let ((*c-opened-blocks* 0))
(loop for f in forms
do (c2expr f)
finally (when (plusp *c-opened-blocks*)
(error "Stray opened C blocks")))))
(defun c2expr (form)
(cond ((consp form)
(loop for f in form
do (c2expr f)))
((tag-p form)
(pprint-c1form form *dump-output*)
(when (plusp (tag-ref form))
(let ((label (tag-label form)))
(unless label
(error "No label for tag ~A" form))
(wt-label label))))
((c1form-p form)
(pprint-c1form form *dump-output*)
(let* ((*file* (c1form-file form))
(*file-position* (c1form-file form))
(*current-form* (c1form-form form))
(*current-toplevel-form* (c1form-toplevel-form form))
(*current-c2form* form)
(*cmp-env* (c1form-env form))
(name (c1form-name form))
(args (c1form-args form))
(dispatch (gethash name +c2-dispatch-table+)))
(unless dispatch
(error "Unknown C1 form ~A" form))
(apply dispatch args)))
(t
(error "In C2EXPR, invalid C1 form ~A" form))))
;;;
;;; C-BLOCKS
;;;
(defun open-c-block (&optional no-new-line)
(unless no-new-line
(if (zerop *c-opened-blocks*)
(wt-nl1)
(wt-nl)))
(incf *c-opened-blocks*)
(wt "{"))
(defun close-all-c-blocks (&optional (final-value 0))
(let ((n (- *c-opened-blocks* final-value)))
(when (plusp n)
(if (zerop final-value)
(wt-nl1)
(wt-nl))
(dotimes (i n)
(wt "}"))
(setf *c-opened-blocks* final-value))))
(defun close-c-block ()
(unless (plusp *c-opened-blocks*)
(error "Internal error: number of C/C++ blocks does not match expected value"))
(wt-nl) (wt "}") (decf *c-opened-blocks*))
(defmacro with-c-block (&body code)
`(unwind-protect
(progn
(open-c-block)
,@code)
(close-c-block)))
;;;
;;; VARIABLE BINDINGS
;;;
(defun c2bind (temps)
(loop with block-p = nil
with new-env = t
with closed-overs = '()
for v in temps
do (case (var-kind v)
((REPLACED DISCARDED))
((SPECIAL GLOBAL) (baboon))
((LEXICAL)
(push v closed-overs))
((CLOSURE)
(push v closed-overs)
(when new-env
(let ((env-lvl *env-lvl*))
(format *dump-output* "~&;;; Increasing environment depth to ~D"
(1+ env-lvl))
(unless block-p (open-c-block) (setf block-p t))
(wt *volatile* "cl_object env" (incf *env-lvl*) " = env" env-lvl ";"))
(setf new-env nil)))
(t
(setf (var-loc v) (next-lcl))
(wt-nl)
(unless block-p (open-c-block :no-newline) (setf block-p t))
(wt *volatile* (rep-type-name (var-kind v)) " " v ";")
(let ((name (var-name v))) (when name (wt-comment (var-name v))))))
finally (loop for v in closed-overs do (bind NIL v))))
(defun c2bind-special (var value-loc)
(bds-bind value-loc var))
(defun c2progv-op (destination vars-loc values-loc)
(wt-nl destination "=ecl_progv(cl_env_copy," vars-loc "," values-loc ");"))
(defun c2progv-exit-op (ndx-loc)
(wt-nl "ecl_bds_unwind(cl_env_copy," ndx-loc ");"))
(defun c2unbind-specials (nspecials)
(case nspecials
(0)
(1 (wt-nl "ecl_bds_unwind1(cl_env_copy);"))
(t (wt-nl "ecl_bds_unwind(cl_env_copy," nspecials ");"))))
(defun c2unbind (temps &optional (close-block t))
(loop with nspecials = 0
with closure = 0
with block-p = nil
for v in temps
for kind = (var-kind v)
do (case kind
(CLOSURE (setf block-p t) (incf closure))
((SPECIAL GLOBAL) (incf nspecials))
((REPLACED DISCARDED LEXICAL))
(otherwise (setf block-p t)))
finally (progn
(c2unbind-specials nspecials)
(unless (zerop closure)
(wt-nl "/* End of lifetime of env" *env-lvl* "*/")
(decf *env-lvl*)
(format *dump-output* "~&;;; Decreasing environment depth to ~D"
*env-lvl*)
(decf *env* closure))
(when block-p (close-c-block)))))
;;;
;;; ASSIGNMENTS
;;;
(defun c2set (loc value)
(cond ((eq loc value)
(cmpnote "Dummy SET statement ~A <- ~A" loc value)
(unless (equal loc *destination*)
(format *dump-output* "~&;;; In dummy SET, destination ~A /= loc ~A"
*destination* loc)))
(t
(set-loc value loc))))
(defun c2set-mv (locations min-args max-args)
(let* ((extras (nthcdr max-args locations))
(locations (ldiff locations extras)))
(loop for v in extras
do (bind nil v))
(with-c-block
(if (plusp min-args)
(wt-nl "int _nvalues = cl_env_copy->nvalues - " min-args ";")
(wt-nl "int _nvalues = cl_env_copy->nvalues;"))
(loop for i from 0 below min-args
for v = (pop locations)
do (set-loc `(VALUE ,i) v))
(loop with last-label = (next-label)
with labels = '()
for v in locations
for i from min-args
for l = (next-label)
do (progn
(push l labels)
(wt-nl "if (_nvalues-- <= 0) ") (wt-go l)
(set-loc `(VALUE ,i) v))
finally (progn
(wt-nl) (wt-go last-label)
(loop for l in (nreverse labels)
for v in (reverse locations)
do (wt-label l)
do (set-loc nil v))
(wt-label last-label))))))
(defun c2values-op (locations)
(loop for i from 0
for v in locations
do (wt-nl "cl_env_copy->values[" i "]=" v ";")
finally (wt-nl "cl_env_copy->nvalues=" i ";")))
;;;
;;; FUNCTION ARGUMENTS
;;;
(defun c2bind-requireds (var-loc-pairs)
(loop with new-env = t
with block-p = nil
for (v . required-loc) in var-loc-pairs
;; This is a hack: the C backend imposes that the arguments have
;; always representation type :OBJECT
do (when (member (var-kind v) '(:DOUBLE :CHAR :FIXUNM :FLOAT))
(setf (var-kind v) :OBJECT))
;; Here we perform the actual binding.
do (case (var-kind v)
(CLOSURE
(when new-env
(let ((env-lvl *env-lvl*))
(format *dump-output* "~&;;; Increasing environment depth to ~D"
(1+ env-lvl))
(unless block-p (open-c-block) (setf block-p t))
(wt *volatile* "cl_object env" (incf *env-lvl*)
" = env" env-lvl ";")
(setf new-env nil))))
((SPECIAL GLOBAL LEXICAL REPLACED DISCARDED))
(t
(unless block-p (open-c-block) (setf block-p t)))))
(loop for (v . required-loc) in var-loc-pairs
do (bind required-loc v)))
(defconstant +simple-va-args+ (make-symbol "args"))
(defconstant +cl-va-args+ (make-symbol "cl_args"))
(defconstant +nargs-var+ (make-symbol "narg"))
(defun simple-varargs-loc-p (var)
(string= (var-name var) +simple-va-args+))
(defun c2varargs-bind-op (nargs-loc varargs-loc minargs maxargs nkeywords check)
(open-c-block)
(wt-comment "Arguments parsing - begin")
(when (plusp nkeywords)
(wt-nl "cl_object keyvars[" (* 2 nkeywords) "];"))
(if (simple-varargs-loc-p varargs-loc)
(progn
(wt-nl "va_list args;")
(wt-comment "Remaining arguments list")
(wt-nl "va_start(args,__ecl_last_arg);"))
(progn
(wt-nl "cl_va_list cl_args;")
(wt-comment "Optional arguments list")
(wt-nl "cl_va_start(cl_args,__ecl_last_arg,narg," minargs ");")))
(when check
(when (plusp minargs)
(wt-nl "if (narg<" minargs ") FEwrong_num_arguments_anonym();"))
(unless (>= maxargs call-arguments-limit)
(wt-nl "if (narg>" maxargs ") FEwrong_num_arguments_anonym();")))
(when (plusp minargs)
(wt-nl "narg -= " minargs ";")))
(defun c2varargs-pop-op (destination nargs-loc varargs-loc)
(set-loc (if (simple-varargs-loc-p varargs-loc) 'VA-ARG 'CL-VA-ARG)
destination))
(defun c2varargs-rest-op (dest-loc nargs-loc varargs-loc nkeys
keywords-loc allow-other-keys)
(if (not (or keywords-loc allow-other-keys))
;; Simple case: we do not need to parse keyword arguments, just
;; collect all &rest
(set-loc (if (simple-varargs-loc-p varargs-loc)
'(c-inline (:object) "cl_grab_rest_args(args)" () t nil)
'(c-inline (:object) "cl_grab_rest_args(cl_args)" () t nil))
dest-loc)
;; More complicated case: we may need to parse keyword arguments,
;; collect all remaining arguments in &rest and check or not for
;; the presence of unknown keywords.
(progn
(if keywords-loc
(wt-nl "cl_parse_key(cl_args," nkeys ",&(" keywords-loc "),keyvars")
(wt-nl "cl_parse_key(cl_args,0,NULL,NULL"))
(if (and dest-loc (not (eq dest-loc 'TRASH)))
(wt ",(cl_object*)&" dest-loc)
(wt ",NULL"))
(wt (if allow-other-keys ",TRUE);" ",FALSE);")))))
(defun c2varargs-unbind-op (nargs-loc varargs-loc minargs maxargs nkeywords)
(when (simple-varargs-loc-p varargs-loc)
(wt-nl "va_end(args);"))
(close-c-block)
(wt-comment "Arguments parsing - end"))
;;;
;;; JUMP FRAMES
;;;
(defun c2frame-set (var no-label)
(if (eq var 'UNWIND-PROTECT)
(wt-nl "if (ecl_frs_push(cl_env_copy,ECL_PROTECT_TAG)==0) ")
(wt-nl "if (ecl_frs_push(cl_env_copy," var ")==0) "))
(wt-go (tag-label no-label)))
(defun c2frame-pop (&optional var)
(unless (and var (var-p var) (zerop (var-ref var)))
(wt-nl "ecl_frs_pop(cl_env_copy);")))
(defun c2frame-save-next (var)
(bind "(cl_object)(cl_env_copy->nlj_fr)" var))
(defun c2frame-jmp-next (var)
(wt-nl "ecl_unwind(cl_env_copy," var ");"))
(defun c2frame-id (var)
(set-loc '(VV "ECL_NEW_FRAME_ID(cl_env_copy)") var))
;;;
;;; STACK FRAMES
;;;
(defun c2stack-frame-open (var)
;; STACK-FRAME-OPEN always follows a BIND form and hence it needs
;; no opening / closing braces.
(wt "struct ecl_stack_frame _ecl_inner_frame_aux;")
(wt-nl *volatile* "cl_object _ecl_inner_frame = ecl_stack_frame_open(cl_env_copy,(cl_object)&_ecl_inner_frame_aux,0);")
(bind "_ecl_inner_frame" var))
(defun c2stack-frame-push (frame-var value-loc)
(setf value-loc (coerce-one-location value-loc :object))
(wt-nl "ecl_stack_frame_push(" frame-var "," value-loc ");"))
(defun c2stack-frame-push-values (frame-var)
(wt-nl "ecl_stack_frame_push_values(" frame-var ");"))
(defun c2stack-frame-pop-values (frame-var dest)
(wt-nl "cl_env_copy->values[0]=ecl_stack_frame_pop_values(" frame-var ");")
(unless (eq dest 'trash)
(set-loc 'VALUES dest)))
(defun c2stack-frame-apply (frame-var function-loc)
(wt-nl "cl_env_copy->values[0]=ecl_apply_from_stack_frame(" frame-var
"," function-loc ");"))
(defun c2stack-frame-close (frame-var)
(wt-nl "ecl_stack_frame_close(" frame-var ");"))
;;;
;;; LOCAL AND NONLOCAL CONTROL TRANSFER
;;;
(defun c2jmp (tag)
(wt-nl) (wt-go (tag-label tag)))
(defun set-loc-jmp-true (loc tag)
(wt-nl "if (" (coerce-one-location loc :bool) ") ")
(wt-go (tag-label tag)))
(defun set-loc-jmp-false (loc tag)
(wt-nl "if (!(" (coerce-one-location loc :bool) ")) ")
(wt-go (tag-label tag)))
(defconstant +integer-representation-types+
'#.(loop for records on +representation-types+ by #'cddr
for (name (type c-type) &rest) = records
when (subtypep type 'integer)
collect name))
(defun set-loc-jmp-zero (loc tag)
(assert (member (loc-representation-type loc) +integer-representation-types+
:test #'eq))
(wt-nl "if (!(" loc ")) ")
(wt-go (tag-label tag)))
(defun set-loc-jmp-nonzero (loc tag)
(assert (member (loc-representation-type loc) +integer-representation-types+
:test #'eq))
(wt-nl "if ((" loc ")) ")
(wt-go (tag-label tag)))
(defun c2return-from-op (var name)
(wt-nl "cl_return_from(" var "," (add-symbol name) ");"))
(defun c2throw-op (tag)
(wt-nl "cl_throw(" (coerce-one-location tag :object) ");"))
(defun c2go-op (tag)
(let ((var (tag-var tag)))
(wt-nl "cl_go(" var ",MAKE_FIXNUM(" (tag-index tag) "));")))
;;;
;;; FUNCTION CALLS, CLOSURES AND THE LIKE
;;;
(defun c2do-flet/labels (local-funs)
;; FIXME! We change the order for compatibility to make "diff"
;; with previous sources easier
(mapc #'c::new-local (reverse local-funs)))
(defun c2funcall-op (destination args)
(let* ((loc (pop args))
(form-type (location-primary-type loc))
(function-p (and (subtypep form-type 'function)
(policy-assume-right-type))))
(set-loc (call-unknown-global-loc nil loc args function-p)
destination)))
(defun c2call-local (destination fun args)
(set-loc (call-normal-loc destination fun args) destination))
(defun c2call-global (destination fname args &optional (return-type T))
(let ((fun (find fname *global-funs* :key #'fun-name :test #'same-fname-p)))
(set-loc (call-global-loc destination fname fun args return-type
(location-type destination))
destination)))
(defun call-global-loc (destination fname fun args return-type expected-type)
;; Check whether it is a global function that we cannot call directly.
(when (and (or (null fun) (fun-global fun)) (not (inline-possible fname)))
(return-from call-global-loc
(call-unknown-global-loc fname nil args)))
;; Open-codable function.
(let* ((arg-types (mapcar #'location-primary-type args))
(ii (inline-function destination fname arg-types
(type-and return-type expected-type))))
(when ii
(return-from call-global-loc (apply-inline-info ii args))))
;; Call to a function defined in the same file. Direct calls are
;; only emitted for low or neutral values of DEBUG >= 2.
(when (and (<= (cmp-env-optimization 'debug) 1)
(or (fun-p fun)
(and (null fun)
(setf fun (find fname *global-funs* :test #'same-fname-p
:key #'fun-name)))))
(return-from call-global-loc (call-normal-loc fname fun args)))
;; Call to a global (SETF ...) function
(when (not (symbolp fname))
(return-from call-global-loc (call-unknown-global-loc fname nil args)))
;; Call to a function whose C language function name is known,
;; either because it has been proclaimed so, or because it belongs
;; to the runtime.
(when (and (<= (cmp-env-optimization 'debug) 1)
(setf fd (sys:get-sysprop fname 'Lfun)))
(multiple-value-bind (minarg maxarg) (get-proclaimed-narg fname)
(return-from call-global-loc
(call-exported-function-loc
fname args fd minarg maxarg
(member fname c-data::*in-all-symbols-functions*)))))
(multiple-value-bind (found fd minarg maxarg)
(si::mangle-name fname t)
(when found
(return-from call-global-loc
(call-exported-function-loc fname args fd minarg maxarg t))))
(call-unknown-global-loc fname nil args))
(defun coerce-one-location (location rep-type)
(if (eq rep-type (loc-representation-type location))
location
`(COERCE-LOC ,rep-type ,location)))
(defun coerce-locations (locations &optional types args-to-be-saved)
(loop for i from 0
for loc in locations
for type = (if types (pop types) :object)
for rep-type = (lisp-type->rep-type type)
when (and args-to-be-saved (member i args-to-be-saved)
(not (var-p loc)))
do (cmpnote "Ignoring '~{@~A;~}' in a c-inline form" args-to-be-saved)
collect (coerce-one-location loc rep-type)))
(defun call-normal-loc (fname fun args)
`(CALL-NORMAL ,fun ,(coerce-locations args)))
(defun call-exported-function-loc (fname args fun-c-name minarg maxarg in-core)
(unless in-core
;; We only write declarations for functions which are not in lisp_external.h
(multiple-value-bind (val declared)
(gethash fun-c-name *compiler-declared-globals*)
(unless declared
(if (= maxarg minarg)
(progn
(wt-nl-h "extern cl_object " fun-c-name "(")
(dotimes (i maxarg)
(when (> i 0) (wt-h1 ","))
(wt-h1 "cl_object"))
(wt-h1 ");"))
(progn
(wt-nl-h "#ifdef __cplusplus")
(wt-nl-h "extern cl_object " fun-c-name "(...);")
(wt-nl-h "#else")
(wt-nl-h "extern cl_object " fun-c-name "();")
(wt-nl-h "#endif")))
(setf (gethash fun-c-name *compiler-declared-globals*) 1))))
(let ((fun (make-fun :name fname :global t :cfun fun-c-name :lambda 'NIL
:minarg minarg :maxarg maxarg)))
(call-normal-loc fname fun args)))
(defun call-unknown-global-loc (fname loc args &optional function-p)
(unless loc
(if (and (symbolp fname)
(not (eql (symbol-package fname)
(find-package "CL"))))
(setf loc (add-symbol fname)
function-p nil)
(setf loc (list 'FDEFINITION fname)
function-p t)))
`(CALL-INDIRECT ,loc ,(coerce-locations args) ,fname ,function-p))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; FUNCTION CALL LOCATIONS
;;;
(defun wt-call-indirect (fun-loc args fname function-p)
(let ((narg (length args)))
(if function-p
(wt "(cl_env_copy->function=" fun-loc ")->cfun.entry(" narg)
(wt "ecl_function_dispatch(cl_env_copy," fun-loc ")(" narg))
(dolist (arg args)
(wt "," arg))
(wt ")")
(when fname (wt-comment fname))))
(defun wt-call-normal (fun args)
(unless (fun-cfun fun)
(baboon "Function without a C name: ~A" (fun-name fun)))
(let* ((minarg (fun-minarg fun))
(maxarg (fun-maxarg fun))
(fun-c-name (fun-cfun fun))
(fun-lisp-name (fun-name fun))
(narg (length args))
(env nil))
(case (fun-closure fun)
(CLOSURE
(setf env (environment-accessor fun)))
(LEXICAL
(let ((lex-lvl (fun-level fun)))
(dotimes (n lex-lvl)
(let* ((j (- lex-lvl n 1))
(x (lex-env-var-name j)))
(push x args))))))
(unless (<= minarg narg maxarg)
(cmperr "Wrong number of arguments for function ~S"
(or fun-lisp-name 'ANONYMOUS)))
(when (fun-narg-p fun)
(push narg args))
(wt-call fun-c-name args fun-lisp-name env)))
(defun wt-call (fun args &optional fname env)
(if env
(progn
(pushnew :aux-closure (fun-code-gen-props *current-function*))
(wt "(aux_closure.env=" env ",cl_env_copy->function=(cl_object)&aux_closure,")
(wt-call fun args)
(wt ")"))
(progn
(wt fun "(")
(let ((comma ""))
(dolist (arg args)
(wt comma arg)
(setf comma ",")))
(wt ")")))
(when fname (wt-comment fname)))
;;;
;;; DEBUG INFORMATION
;;;
(defun c2debug-env-open (fname)
(open-c-block)
(wt "struct ihs_frame _ecl_ihs;")
(wt-comment "Debug info for:")
(wt-nl "const cl_object _ecl_debug_env = Cnil;")
(wt-comment fname)
(wt-nl "ecl_ihs_push(cl_env_copy,&_ecl_ihs," (add-symbol fname) ",_ecl_debug_env);")
(wt-nl))
(defun c2debug-env-close (fname)
(wt-nl)
(wt-nl "ecl_ihs_pop(cl_env_copy);")
(wt-comment "Debug info removed")
(close-c-block))
(defun c2debug-env-push-vars (variables)
#-:msvc ;; FIXME! Problem with initialization of statically defined vectors
(let* ((filtered-locations '())
(filtered-codes '()))
(open-c-block)
(wt-comment "Debug bindings - register")
;; 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 variables
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 (second 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
(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 "(cl_index)(_ecl_debug_env),(cl_index)(_ecl_descriptors)")
(loop for var-loc in filtered-locations
do (wt ",(cl_index)(&" (lcl-name var-loc) ")"))
(wt "};")
(wt-nl "ecl_def_ct_vector(_ecl_debug_env,aet_index,_ecl_debug_info_raw,"
(+ 2 (length filtered-locations))
",,);"))
(when filtered-codes
(wt-nl "ihs.lex_env=_ecl_debug_env;"))
(wt-nl)))
(defun c2debug-env-pop-vars (variables close-block)
#-:msvc
(progn
(wt-nl)
(wt-comment "Debug bindings - remove")
(wt-nl "ihs.lex_env=_ecl_debug_env->vector.self.t[0];")
(when close-block (close-c-block))))
;;;
;;; FUNCTION PROLOGUE AND EPILOGUE
;;;
(defun c2emit-function-declaration (fun)
(let* ((cfun (fun-cfun fun))
(comma "")
(narg-p (fun-narg-p fun)))
(cond ((fun-exported fun)
(wt-nl-h "ECL_DLLEXPORT cl_object " cfun "(")
(wt-nl1 "cl_object " cfun "("))
(t
(wt-nl-h "static cl_object " cfun "(")
(wt-nl1 "static cl_object " cfun "(")))
(when narg-p
(wt-h *volatile* "cl_narg")
(wt *volatile* "cl_narg narg")
(setf comma ", "))
(when (eq (fun-closure fun) 'LEXICAL)
(dotimes (n (fun-level fun))
(wt-h comma *volatile* "cl_object *")
(wt comma *volatile* "cl_object *lex" n)
(setf comma ", ")))
(loop for lcl from 1 to (fun-minarg fun)
do (progn
(wt-h comma "cl_object " *volatile*)
(wt comma "cl_object " *volatile*) (wt-lcl lcl)
(setf comma ", ")))
(when narg-p
(wt-h ", ...")
(wt ", ..."))
(wt-h ");")
(wt ")")))
(defun c2emit-local-variables (fun)
;; The following are macros containing the local variables that will
;; be needed. They are defined at the end.
(let ((cname (fun-cfun fun)))
(wt-nl "XTR_" cname))
(wt-nl "const cl_env_ptr cl_env_copy = ecl_process_env();")
(wt-nl "cl_object " *volatile*
(if (eq (fun-closure fun) 'CLOSURE)
"env0 = cl_env_copy->function->cclosure.env;"
"env0 = Cnil;"))
(wt-nl "cl_object " *volatile* "value0;")
(when (policy-check-stack-overflow)
(wt-nl "ecl_cs_check(cl_env_copy,value0);")
(wt-comment "C stack overflow?")))
(defun c2emit-closure-scan (fun)
"Scans the environment looking for the locations of all closure variables we
actually use."
(let ((clv-used (and (eq (fun-closure fun) 'CLOSURE)
(function-closure-variables fun))))
(when clv-used
(loop for v in clv-used
do (format *dump-output*
"~&;;; Closure variable ~A loc ~S"
(var-name v) (var-loc v)))
(wt-nl "/* Scanning closure data ... */")
(loop with first = t
with variables = (sort clv-used #'> :key #'var-loc)
with v = (pop variables)
with loc = (var-loc v)
for n from (1- (fun-env fun)) downto 0
while v
do (progn
(when (> loc n)
(error "Inconsistent value of variable location ~A and fun-env for ~A"
(var-name a) (fun-name fun)))
(wt-nl "cl_object CLV" n)
(if first
(progn (wt "=env0;") (setf first nil))
(wt "=CDR(CLV" (1+ n) ");"))
(when (= n loc)
(wt-comment (var-name v))
(setf v (pop variables)
loc (and v (var-loc v))))))
(wt-nl "/* ... closure scanning finished */"))))
(defun c2emit-last-arg-macro (fun)
(when (fun-narg-p fun)
(let ((nreq (fun-minarg fun)))
(wt-nl1 "#define __ecl_last_arg "
(cond ((plusp nreq)
(format nil "V~d" nreq))
((eq (fun-closure fun) 'LEXICAL)
(format nil "lex~D" (1- (fun-level fun))))
(t "narg")))
(wt-comment "Last argument before '...'"))))
(defun c2entry-function-prologue (fun &key shared-data)
(wt-nl1 "#define flag V1")
(open-c-block)
(wt "cl_object *VVtemp;")
(wt-comment "Entry point of ECL module / FASL")
(when shared-data
(wt-nl "Cblock=flag;")
(wt-nl "VV = flag->cblock.data;"))
(unless shared-data
(wt-nl "if (!FIXNUMP(flag)){")
(wt-comment "Creation of lisp data")
(wt-nl "Cblock=flag;")
(wt-nl1 "#ifndef ECL_DYNAMIC_VV")
(wt-nl "flag->cblock.data = VV;")
(wt-nl1 "#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;")
(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 *compile-file-truename*
(wt-nl "flag->cblock.source = make_constant_base_string(\""
(namestring *compile-file-truename*) "\");"))
(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 = \"" (c-tags:init-name-tag (fun-cfun fun)) "\";")
)
(when si::*compiler-constants*
(wt-nl "{cl_object data = ecl_symbol_value("
(nth-value 1 (si::mangle-name '*compiler-constants* nil))
");")
(wt-nl "memcpy(VV, data->vector.self.t, VM*sizeof(cl_object));}"))
(wt-nl "VVtemp = Cblock->cblock.temp_data;")
(wt-comment "Here all lisp data has been created")
(wt-nl)
(wt-comment "It follows all toplevel forms"))
(defun c2function-prologue (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))
(c2emit-function-declaration fun)
(open-c-block :function)
(format *dump-output* "~&;;; Environment depth ~A" *env-lvl*)
(format *dump-output* "~&;;; Environment size ~A" *env*)
(c2emit-local-variables fun)
(c2emit-last-arg-macro fun)
(c2emit-closure-scan fun)
(when (eq (fun-name fun) +init-function-name+)
(c2entry-function-prologue fun)))
(defun c2function-epilogue (fun)
(let* ((name (fun-cfun fun))
(closure (fun-closure fun)))
;; 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.
(wt-nl-h "#define XTR_" name)
(when (plusp *max-lex*)
(wt-h " \\")
(wt-nl-h " volatile cl_object lex" *level* "[" *max-lex* "];"))
(when (member :aux-closure (fun-code-gen-props fun))
(wt-h " \\")
(wt-nl-h " struct ecl_cclosure aux_closure;"))
;; Close C blocks
(when (fun-narg-p fun)
(wt-nl1 "#undef __ecl_last_arg"))
(unless (zerop *env-lvl*)
(error "Wrong value of environment depth ~A" *env-lvl*))
(unless (= *env* (fun-env fun))
(error "Wrong value of environment size ~A" *env*))
(close-all-c-blocks)))
;;;
;;; FSET FIXME! UNUSED!
;;;
(defun c2fset (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 c2function!
(new-local fun)
(return-from c2fset))
(when (fun-closure fun)
(return-from c2fset (c2call-global destination 'SI:FSET c1forms)))
(let ((*inline-blocks* 0)
(loc (data-empty-loc)))
(push (list loc fname fun) *global-cfuns-array*)
;; FIXME! Look at c2function!
(new-local fun)
(wt-nl (if macro "ecl_cmp_defmacro(" "ecl_cmp_defun(")
loc ");")
(close-inline-blocks)))