(in-package "SB!C")
\f
-;;;; control special forms
+;;;; special forms for control
(def-ir1-translator progn ((&rest forms) start cont)
#!+sb-doc
(node (make-if :test pred
:consequent then-block
:alternative else-block)))
+ ;; IR1-CONVERT-MAYBE-PREDICATE requires DEST to be CIF, so the
+ ;; order of the following two forms is important
(setf (continuation-dest pred) node)
(ir1-convert start pred test)
(link-node-to-previous-continuation node pred)
(setf (entry-cleanup entry) cleanup)
(link-node-to-previous-continuation entry start)
(use-continuation entry dummy)
-
+
(let* ((env-entry (list entry cont))
(*lexenv* (make-lexenv :blocks (list (cons name env-entry))
:cleanup cleanup)))
(push env-entry (continuation-lexenv-uses cont))
(ir1-convert-progn-body dummy cont forms))))
-
(def-ir1-translator return-from ((name &optional value) start cont)
#!+sb-doc
"Return-From Block-Name Value-Form
(starts dummy)
(dolist (segment (rest segments))
(let* ((tag-cont (make-continuation))
- (tag (list (car segment) entry tag-cont)))
+ (tag (list (car segment) entry tag-cont)))
(conts tag-cont)
(starts tag-cont)
(continuation-starts-block tag-cont)
;;; are ignored for non-top-level forms. For non-top-level forms, an
;;; eval-when specifying the :EXECUTE situation is treated as an
;;; implicit PROGN including the forms in the body of the EVAL-WHEN
-;;; form; otherwise, the forms in the body are ignored.
+;;; form; otherwise, the forms in the body are ignored.
(def-ir1-translator eval-when ((situations &rest forms) start cont)
#!+sb-doc
"EVAL-WHEN (Situation*) Form*
(compiler-style-warn "duplicate definitions in ~S" definitions))
(let* ((processed-definitions (mapcar definitionize-fun definitions))
(*lexenv* (make-lexenv definitionize-keyword processed-definitions)))
- (funcall fun)))
+ (funcall fun definitionize-keyword processed-definitions)))
-;;; Tweak *LEXENV* to include the DEFINITIONS from a MACROLET, then
+;;; Tweak LEXENV to include the DEFINITIONS from a MACROLET, then
;;; call FUN (with no arguments).
;;;
;;; This is split off from the IR1 convert method so that it can be
-;;; shared by the special-case top level MACROLET processing code.
+;;; shared by the special-case top level MACROLET processing code, and
+;;; further split so that the special-case MACROLET processing code in
+;;; EVAL can likewise make use of it.
+(defmacro macrolet-definitionize-fun (context lexenv)
+ (flet ((make-error-form (control &rest args)
+ (ecase context
+ (:compile `(compiler-error ,control ,@args))
+ (:eval `(error 'simple-program-error
+ :format-control ,control
+ :format-arguments (list ,@args))))))
+ `(lambda (definition)
+ (unless (list-of-length-at-least-p definition 2)
+ ,(make-error-form
+ "The list ~S is too short to be a legal local macro definition."
+ 'definition))
+ (destructuring-bind (name arglist &body body) definition
+ (unless (symbolp name)
+ ,(make-error-form "The local macro name ~S is not a symbol." 'name))
+ (unless (listp arglist)
+ ,(make-error-form
+ "The local macro argument list ~S is not a list."
+ 'arglist))
+ (with-unique-names (whole environment)
+ (multiple-value-bind (body local-decls)
+ (parse-defmacro arglist whole body name 'macrolet
+ :environment environment)
+ `(,name macro .
+ ,(compile-in-lexenv
+ nil
+ `(lambda (,whole ,environment)
+ ,@local-decls
+ (block ,name ,body))
+ ,lexenv))))))))
+
(defun funcall-in-macrolet-lexenv (definitions fun)
(%funcall-in-foomacrolet-lexenv
- (lambda (definition)
- (unless (list-of-length-at-least-p definition 2)
- (compiler-error
- "The list ~S is too short to be a legal local macro definition."
- definition))
- (destructuring-bind (name arglist &body body) definition
- (unless (symbolp name)
- (compiler-error "The local macro name ~S is not a symbol." name))
- (let ((whole (gensym "WHOLE"))
- (environment (gensym "ENVIRONMENT")))
- (multiple-value-bind (body local-decls)
- (parse-defmacro arglist whole body name 'macrolet
- :environment environment)
- `(,name macro .
- ,(compile nil
- `(lambda (,whole ,environment)
- ,@local-decls
- (block ,name ,body))))))))
+ (macrolet-definitionize-fun :compile (make-restricted-lexenv *lexenv*))
:funs
definitions
fun))
"MACROLET ({(Name Lambda-List Form*)}*) Body-Form*
Evaluate the Body-Forms in an environment with the specified local macros
defined. Name is the local macro name, Lambda-List is the DEFMACRO style
- destructuring lambda list, and the Forms evaluate to the expansion. The
- Forms are evaluated in the null environment."
- (funcall-in-macrolet-lexenv definitions
- (lambda ()
- (ir1-translate-locally body start cont))))
+ destructuring lambda list, and the Forms evaluate to the expansion.."
+ (funcall-in-macrolet-lexenv
+ definitions
+ (lambda (&key funs)
+ (declare (ignore funs))
+ (ir1-translate-locally body start cont))))
-(defun funcall-in-symbol-macrolet-lexenv (definitions fun)
- (%funcall-in-foomacrolet-lexenv
- (lambda (definition)
- (unless (proper-list-of-length-p definition 2)
- (compiler-error "malformed symbol/expansion pair: ~S" definition))
+(defmacro symbol-macrolet-definitionize-fun (context)
+ (flet ((make-error-form (control &rest args)
+ (ecase context
+ (:compile `(compiler-error ,control ,@args))
+ (:eval `(error 'simple-program-error
+ :format-control ,control
+ :format-arguments (list ,@args))))))
+ `(lambda (definition)
+ (unless (proper-list-of-length-p definition 2)
+ ,(make-error-form "malformed symbol/expansion pair: ~S" 'definition))
(destructuring-bind (name expansion) definition
(unless (symbolp name)
- (compiler-error
- "The local symbol macro name ~S is not a symbol."
- name))
- `(,name . (MACRO . ,expansion))))
+ ,(make-error-form
+ "The local symbol macro name ~S is not a symbol."
+ 'name))
+ (let ((kind (info :variable :kind name)))
+ (when (member kind '(:special :constant))
+ ,(make-error-form
+ "Attempt to bind a ~(~A~) variable with SYMBOL-MACROLET: ~S"
+ 'kind 'name)))
+ `(,name . (MACRO . ,expansion))))))1
+
+(defun funcall-in-symbol-macrolet-lexenv (definitions fun)
+ (%funcall-in-foomacrolet-lexenv
+ (symbol-macrolet-definitionize-fun :compile)
:vars
definitions
fun))
-
+
(def-ir1-translator symbol-macrolet ((macrobindings &body body) start cont)
#!+sb-doc
"SYMBOL-MACROLET ({(Name Expansion)}*) Decl* Form*
body, references to a Name will effectively be replaced with the Expansion."
(funcall-in-symbol-macrolet-lexenv
macrobindings
- (lambda ()
- (ir1-translate-locally body start cont))))
-
-;;; not really a special form, but..
-(def-ir1-translator declare ((&rest stuff) start cont)
- (declare (ignore stuff))
- ;; We ignore START and CONT too, but we can't use DECLARE IGNORE to
- ;; tell the compiler about it here, because the DEF-IR1-TRANSLATOR
- ;; macro would put the DECLARE in the wrong place, so..
- start cont
- (compiler-error "misplaced declaration"))
+ (lambda (&key vars)
+ (ir1-translate-locally body start cont :vars vars))))
\f
;;;; %PRIMITIVE
;;;;
;;; VOP or %VOP.. -- WHN 2001-06-11
;;; FIXME: Look at doing this ^, it doesn't look too hard actually.
(def-ir1-translator %primitive ((name &rest args) start cont)
- (unless (symbolp name)
- (compiler-error "internal error: Primitive name ~S is not a symbol." name))
+ (declare (type symbol name))
(let* ((template (or (gethash name *backend-template-names*)
- (compiler-error
- "internal error: Primitive name ~A is not defined."
- name)))
+ (bug "undefined primitive ~A" name)))
(required (length (template-arg-types template)))
(info (template-info-arg-count template))
(min (+ required info))
(nargs (length args)))
(if (template-more-args-type template)
(when (< nargs min)
- (compiler-error "internal error: Primitive ~A was called ~
- with ~R argument~:P, ~
- but wants at least ~R."
- name
- nargs
- min))
+ (bug "Primitive ~A was called with ~R argument~:P, ~
+ but wants at least ~R."
+ name
+ nargs
+ min))
(unless (= nargs min)
- (compiler-error "internal error: Primitive ~A was called ~
- with ~R argument~:P, ~
- but wants exactly ~R."
- name
- nargs
- min)))
+ (bug "Primitive ~A was called with ~R argument~:P, ~
+ but wants exactly ~R."
+ name
+ nargs
+ min)))
(when (eq (template-result-types template) :conditional)
- (compiler-error
- "%PRIMITIVE was used with a conditional template."))
+ (bug "%PRIMITIVE was used with a conditional template."))
(when (template-more-results-type template)
- (compiler-error
- "%PRIMITIVE was used with an unknown values template."))
+ (bug "%PRIMITIVE was used with an unknown values template."))
(ir1-convert start
cont
(reference-constant start cont thing))
\f
;;;; FUNCTION and NAMED-LAMBDA
+(defun fun-name-leaf (thing)
+ (if (consp thing)
+ (cond
+ ((member (car thing)
+ '(lambda named-lambda instance-lambda lambda-with-lexenv))
+ (ir1-convert-lambdalike
+ thing
+ :debug-name (debug-namify "#'~S" thing)
+ :allow-debug-catch-tag t))
+ ((legal-fun-name-p thing)
+ (find-lexically-apparent-fun
+ thing "as the argument to FUNCTION"))
+ (t
+ (compiler-error "~S is not a legal function name." thing)))
+ (find-lexically-apparent-fun
+ thing "as the argument to FUNCTION")))
(def-ir1-translator function ((thing) start cont)
#!+sb-doc
"FUNCTION Name
Return the lexically apparent definition of the function Name. Name may also
be a lambda expression."
- (if (consp thing)
- (case (car thing)
- ((lambda)
- (reference-leaf start
- cont
- (ir1-convert-lambda thing
- :debug-name (debug-namify
- "#'~S" thing))))
- ((setf)
- (let ((var (find-lexically-apparent-fun
- thing "as the argument to FUNCTION")))
- (reference-leaf start cont var)))
- ((instance-lambda)
- (let ((res (ir1-convert-lambda `(lambda ,@(cdr thing))
- :debug-name (debug-namify "#'~S"
- thing))))
- (setf (getf (functional-plist res) :fin-function) t)
- (reference-leaf start cont res)))
- (t
- (compiler-error "~S is not a legal function name." thing)))
- (let ((var (find-lexically-apparent-fun
- thing "as the argument to FUNCTION")))
- (reference-leaf start cont var))))
-
-;;; `(NAMED-LAMBDA ,NAME ,@REST) is like `(FUNCTION (LAMBDA ,@REST)),
-;;; except that the value of NAME is passed to the compiler for use in
-;;; creation of debug information for the resulting function.
-;;;
-;;; NAME can be a legal function name or some arbitrary other thing.
-;;;
-;;; If NAME is a legal function name, then the caller should be
-;;; planning to set (FDEFINITION NAME) to the created function.
-;;; (Otherwise the debug names will be inconsistent and thus
-;;; unnecessarily confusing.)
-;;;
-;;; Arbitrary other things are appropriate for naming things which are
-;;; not the FDEFINITION of NAME. E.g.
-;;; NAME = (:FLET FOO BAR)
-;;; for the FLET function in
-;;; (DEFUN BAR (X)
-;;; (FLET ((FOO (Y) (+ X Y)))
-;;; FOO))
-;;; or
-;;; NAME = (:METHOD PRINT-OBJECT :AROUND (STARSHIP T))
-;;; for the function used to implement
-;;; (DEFMETHOD PRINT-OBJECT :AROUND ((SS STARSHIP) STREAM) ...).
-(def-ir1-translator named-lambda ((name &rest rest) start cont)
- (reference-leaf start
- cont
- (if (legal-fun-name-p name)
- (ir1-convert-lambda `(lambda ,@rest)
- :source-name name)
- (ir1-convert-lambda `(lambda ,@rest)
- :debug-name name))))
+ (reference-leaf start cont (fun-name-leaf thing)))
\f
;;;; FUNCALL
;;; FUNCALL is implemented on %FUNCALL, which can only call functions
;;; (not symbols). %FUNCALL is used directly in some places where the
;;; call should always be open-coded even if FUNCALL is :NOTINLINE.
-(deftransform funcall ((function &rest args) * * :when :both)
+(deftransform funcall ((function &rest args) * *)
(let ((arg-names (make-gensym-list (length args))))
`(lambda (function ,@arg-names)
(%funcall ,(if (csubtypep (continuation-type function)
,@arg-names))))
(def-ir1-translator %funcall ((function &rest args) start cont)
- (let ((fun-cont (make-continuation)))
- (ir1-convert start fun-cont function)
- (assert-continuation-type fun-cont (specifier-type 'function))
- (ir1-convert-combination-args fun-cont cont args)))
+ (if (and (consp function) (eq (car function) 'function))
+ (ir1-convert start cont `(,(fun-name-leaf (second function)) ,@args))
+ (let ((fun-cont (make-continuation)))
+ (ir1-convert start fun-cont `(the function ,function))
+ (ir1-convert-combination-args fun-cont cont args))))
;;; This source transform exists to reduce the amount of work for the
;;; compiler. If the called function is a FUNCTION form, then convert
(values nil t)))
(deftransform %coerce-callable-to-fun ((thing) (function) *
- :when :both
:important t)
"optimize away possible call to FDEFINITION at runtime"
'thing)
During evaluation of the Forms, bind the Vars to the result of evaluating the
Value forms. The variables are bound in parallel after all of the Values are
evaluated."
- (multiple-value-bind (forms decls) (sb!sys:parse-body body nil)
- (multiple-value-bind (vars values) (extract-let-vars bindings 'let)
- (let ((fun-cont (make-continuation)))
- (let* ((*lexenv* (process-decls decls vars nil cont))
- (fun (ir1-convert-lambda-body
- forms vars
- :debug-name (debug-namify "LET ~S" bindings))))
- (reference-leaf start fun-cont fun))
- (ir1-convert-combination-args fun-cont cont values)))))
+ (if (null bindings)
+ (ir1-translate-locally body start cont)
+ (multiple-value-bind (forms decls) (parse-body body nil)
+ (multiple-value-bind (vars values) (extract-let-vars bindings 'let)
+ (let ((fun-cont (make-continuation)))
+ (let* ((*lexenv* (process-decls decls vars nil cont))
+ (fun (ir1-convert-lambda-body
+ forms vars
+ :debug-name (debug-namify "LET ~S" bindings))))
+ (reference-leaf start fun-cont fun))
+ (ir1-convert-combination-args fun-cont cont values))))))
(def-ir1-translator let* ((bindings &body body)
start cont)
"LET* ({(Var [Value]) | Var}*) Declaration* Form*
Similar to LET, but the variables are bound sequentially, allowing each Value
form to reference any of the previous Vars."
- (multiple-value-bind (forms decls) (sb!sys:parse-body body nil)
+ (multiple-value-bind (forms decls) (parse-body body nil)
(multiple-value-bind (vars values) (extract-let-vars bindings 'let*)
(let ((*lexenv* (process-decls decls vars nil cont)))
(ir1-convert-aux-bindings start cont forms vars values)))))
;;; but we don't need to worry about that within an IR1 translator,
;;; since toplevel-formness is picked off by PROCESS-TOPLEVEL-FOO
;;; forms before we hit the IR1 transform level.
-(defun ir1-translate-locally (body start cont)
+(defun ir1-translate-locally (body start cont &key vars funs)
(declare (type list body) (type continuation start cont))
- (multiple-value-bind (forms decls) (sb!sys:parse-body body nil)
- (let ((*lexenv* (process-decls decls nil nil cont)))
- (ir1-convert-aux-bindings start cont forms nil nil))))
+ (multiple-value-bind (forms decls) (parse-body body nil)
+ (let ((*lexenv* (process-decls decls vars funs cont)))
+ (ir1-convert-progn-body start cont forms))))
(def-ir1-translator locally ((&body body) start cont)
#!+sb-doc
(let ((name (first def)))
(check-fun-name name)
(names name)
- (multiple-value-bind (forms decls) (sb!sys:parse-body (cddr def))
+ (multiple-value-bind (forms decls) (parse-body (cddr def))
(defs `(lambda ,(second def)
,@decls
(block ,(fun-name-block-name name)
Evaluate the Body-Forms with some local function definitions. The bindings
do not enclose the definitions; any use of Name in the Forms will refer to
the lexically apparent function definition in the enclosing environment."
- (multiple-value-bind (forms decls) (sb!sys:parse-body body nil)
+ (multiple-value-bind (forms decls) (parse-body body nil)
(multiple-value-bind (names defs)
(extract-flet-vars definitions 'flet)
(let* ((fvars (mapcar (lambda (n d)
(ir1-convert-lambda d
:source-name n
:debug-name (debug-namify
- "FLET ~S" n)))
+ "FLET ~S" n)
+ :allow-debug-catch-tag t))
names defs))
(*lexenv* (make-lexenv
:default (process-decls decls nil fvars cont)
Evaluate the Body-Forms with some local function definitions. The bindings
enclose the new definitions, so the defined functions can call themselves or
each other."
- (multiple-value-bind (forms decls) (sb!sys:parse-body body nil)
+ (multiple-value-bind (forms decls) (parse-body body nil)
(multiple-value-bind (names defs)
(extract-flet-vars definitions 'labels)
(let* (;; dummy LABELS functions, to be used as placeholders
(ir1-convert-lambda def
:source-name name
:debug-name (debug-namify
- "LABELS ~S" name)))
+ "LABELS ~S" name)
+ :allow-debug-catch-tag t))
names defs))))
;; Modify all the references to the dummy function leaves so
\f
;;;; the THE special operator, and friends
-;;; Do stuff to recognize a THE or VALUES declaration. CONT is the
-;;; continuation that the assertion applies to, TYPE is the type
-;;; specifier and LEXENV is the current lexical environment. NAME is
-;;; the name of the declaration we are doing, for use in error
-;;; messages.
-;;;
-;;; This is somewhat involved, since a type assertion may only be made
-;;; on a continuation, not on a node. We can't just set the
-;;; continuation asserted type and let it go at that, since there may
-;;; be parallel THE's for the same continuation, i.e.
-;;; (if ...
-;;; (the foo ...)
-;;; (the bar ...))
-;;;
-;;; In this case, our representation can do no better than the union
-;;; of these assertions. And if there is a branch with no assertion,
-;;; we have nothing at all. We really need to recognize scoping, since
-;;; we need to be able to discern between parallel assertions (which
-;;; we union) and nested ones (which we intersect).
-;;;
-;;; We represent the scoping by throwing our innermost (intersected)
-;;; assertion on CONT into the TYPE-RESTRICTIONS. As we go down, we
-;;; intersect our assertions together. If CONT has no uses yet, we
-;;; have not yet bottomed out on the first COND branch; in this case
-;;; we optimistically assume that this type will be the one we end up
-;;; with, and set the ASSERTED-TYPE to it. We can never get better
-;;; than the type that we have the first time we bottom out. Later
-;;; THE's (or the absence thereof) can only weaken this result.
-;;;
-;;; We make this work by getting USE-CONTINUATION to do the unioning
-;;; across COND branches. We can't do it here, since we don't know how
-;;; many branches there are going to be.
-(defun ir1ize-the-or-values (type cont lexenv name)
- (declare (type continuation cont) (type lexenv lexenv))
- (let* ((ctype (values-specifier-type type))
- (old-type (or (lexenv-find cont type-restrictions)
- *wild-type*))
- (intersects (values-types-equal-or-intersect old-type ctype))
- (int (values-type-intersection old-type ctype))
- (new (if intersects int old-type)))
- (when (null (find-uses cont))
- (setf (continuation-asserted-type cont) new))
- (when (and (not intersects)
- (not (policy *lexenv*
- (= inhibit-warnings 3)))) ;FIXME: really OK to suppress?
- (compiler-warn
- "The type ~S in ~S declaration conflicts with an ~
- enclosing assertion:~% ~S"
- (type-specifier ctype)
- name
- (type-specifier old-type)))
- (make-lexenv :type-restrictions `((,cont . ,new))
- :default lexenv)))
+;;; A logic shared among THE and TRULY-THE.
+(defun the-in-policy (type value policy start cont)
+ (let ((type (if (ctype-p type) type
+ (compiler-values-specifier-type type))))
+ (cond ((or (eq type *wild-type*)
+ (eq type *universal-type*)
+ (and (leaf-p value)
+ (values-subtypep (make-single-value-type (leaf-type value))
+ type))
+ (and (sb!xc:constantp value)
+ (ctypep (constant-form-value value)
+ (single-value-type type))))
+ (ir1-convert start cont value))
+ (t (let ((value-cont (make-continuation)))
+ (ir1-convert start value-cont value)
+ (let ((cast (make-cast value-cont type policy)))
+ (link-node-to-previous-continuation cast value-cont)
+ (setf (continuation-dest value-cont) cast)
+ (use-continuation cast cont)))))))
;;; Assert that FORM evaluates to the specified type (which may be a
-;;; VALUES type).
+;;; VALUES type). TYPE may be a type specifier or (as a hack) a CTYPE.
;;;
;;; FIXME: In a version of CMU CL that I used at Cadabra ca. 20000101,
;;; this didn't seem to expand into an assertion, at least for ALIEN
;;; values. Check that SBCL doesn't have this problem.
(def-ir1-translator the ((type value) start cont)
- (let ((*lexenv* (ir1ize-the-or-values type cont *lexenv* 'the)))
- (ir1-convert start cont value)))
+ (the-in-policy type value (lexenv-policy *lexenv*) start cont))
;;; This is like the THE special form, except that it believes
;;; whatever you tell it. It will never generate a type check, but
;;; will cause a warning if the compiler can prove the assertion is
;;; wrong.
-;;;
-;;; Since the CONTINUATION-DERIVED-TYPE is computed as the union of
-;;; its uses's types, setting it won't work. Instead we must intersect
-;;; the type with the uses's DERIVED-TYPE.
(def-ir1-translator truly-the ((type value) start cont)
#!+sb-doc
+ ""
(declare (inline member))
- (let ((type (values-specifier-type type))
+ #-nil
+ (let ((type (coerce-to-values (compiler-values-specifier-type type)))
(old (find-uses cont)))
(ir1-convert start cont value)
(do-uses (use cont)
(unless (member use old :test #'eq)
- (derive-node-type use type)))))
+ (derive-node-type use type))))
+ #+nil
+ (the-in-policy type value '((type-check . 0)) start cont))
\f
;;;; SETQ
(setq-var start cont leaf (second things)))
(cons
(aver (eq (car leaf) 'MACRO))
+ ;; FIXME: [Free] type declaration. -- APD, 2002-01-26
(ir1-convert start cont `(setf ,(cdr leaf) ,(second things))))
(heap-alien-info
(ir1-convert start cont
;;; This should only need to be called in SETQ.
(defun setq-var (start cont var value)
(declare (type continuation start cont) (type basic-var var))
- (let ((dest (make-continuation)))
- (setf (continuation-asserted-type dest) (leaf-type var))
- (ir1-convert start dest value)
+ (let ((dest (make-continuation))
+ (type (or (lexenv-find var type-restrictions)
+ (leaf-type var))))
+ (ir1-convert start dest `(the ,type ,value))
(let ((res (make-set :var var :value dest)))
(setf (continuation-dest dest) res)
(setf (leaf-ever-used var) t)
\f
;;;; CATCH, THROW and UNWIND-PROTECT
-;;; We turn THROW into a multiple-value-call of a magical function,
+;;; We turn THROW into a MULTIPLE-VALUE-CALL of a magical function,
;;; since as as far as IR1 is concerned, it has no interesting
;;; properties other than receiving multiple-values.
(def-ir1-translator throw ((tag result) start cont)
(setf (functional-kind fun) :cleanup)
(reference-leaf start cont fun)))
-;;; We represent the possibility of the control transfer by making an
-;;; "escape function" that does a lexical exit, and instantiate the
-;;; cleanup using %WITHIN-CLEANUP.
(def-ir1-translator catch ((tag &body body) start cont)
#!+sb-doc
"Catch Tag Form*
- Evaluates Tag and instantiates it as a catcher while the body forms are
- evaluated in an implicit PROGN. If a THROW is done to Tag within the dynamic
+ Evaluate TAG and instantiate it as a catcher while the body forms are
+ evaluated in an implicit PROGN. If a THROW is done to TAG within the dynamic
scope of the body, then control will be transferred to the end of the body
and the thrown values will be returned."
+ ;; We represent the possibility of the control transfer by making an
+ ;; "escape function" that does a lexical exit, and instantiate the
+ ;; cleanup using %WITHIN-CLEANUP.
(ir1-convert
start cont
- (let ((exit-block (gensym "EXIT-BLOCK-")))
+ (with-unique-names (exit-block)
`(block ,exit-block
(%within-cleanup
:catch
(%catch (%escape-fun ,exit-block) ,tag)
,@body)))))
-;;; UNWIND-PROTECT is similar to CATCH, but hairier. We make the
-;;; cleanup forms into a local function so that they can be referenced
-;;; both in the case where we are unwound and in any local exits. We
-;;; use %CLEANUP-FUN on this to indicate that reference by
-;;; %UNWIND-PROTECT isn't "real", and thus doesn't cause creation of
-;;; an XEP.
(def-ir1-translator unwind-protect ((protected &body cleanup) start cont)
#!+sb-doc
"Unwind-Protect Protected Cleanup*
- Evaluate the form Protected, returning its values. The cleanup forms are
- evaluated whenever the dynamic scope of the Protected form is exited (either
+ Evaluate the form PROTECTED, returning its values. The CLEANUP forms are
+ evaluated whenever the dynamic scope of the PROTECTED form is exited (either
due to normal completion or a non-local exit such as THROW)."
+ ;; UNWIND-PROTECT is similar to CATCH, but hairier. We make the
+ ;; cleanup forms into a local function so that they can be referenced
+ ;; both in the case where we are unwound and in any local exits. We
+ ;; use %CLEANUP-FUN on this to indicate that reference by
+ ;; %UNWIND-PROTECT isn't "real", and thus doesn't cause creation of
+ ;; an XEP.
(ir1-convert
start cont
- (let ((cleanup-fun (gensym "CLEANUP-FUN-"))
- (drop-thru-tag (gensym "DROP-THRU-TAG-"))
- (exit-tag (gensym "EXIT-TAG-"))
- (next (gensym "NEXT"))
- (start (gensym "START"))
- (count (gensym "COUNT")))
+ (with-unique-names (cleanup-fun drop-thru-tag exit-tag next start count)
`(flet ((,cleanup-fun () ,@cleanup nil))
;; FIXME: If we ever get DYNAMIC-EXTENT working, then
;; ,CLEANUP-FUN should probably be declared DYNAMIC-EXTENT,
\f
;;;; multiple-value stuff
-;;; If there are arguments, MULTIPLE-VALUE-CALL turns into an
-;;; MV-COMBINATION.
-;;;
-;;; If there are no arguments, then we convert to a normal
-;;; combination, ensuring that a MV-COMBINATION always has at least
-;;; one argument. This can be regarded as an optimization, but it is
-;;; more important for simplifying compilation of MV-COMBINATIONS.
(def-ir1-translator multiple-value-call ((fun &rest args) start cont)
#!+sb-doc
"MULTIPLE-VALUE-CALL Function Values-Form*
- Call Function, passing all the values of each Values-Form as arguments,
- values from the first Values-Form making up the first argument, etc."
+ Call FUNCTION, passing all the values of each VALUES-FORM as arguments,
+ values from the first VALUES-FORM making up the first argument, etc."
(let* ((fun-cont (make-continuation))
(node (if args
+ ;; If there are arguments, MULTIPLE-VALUE-CALL
+ ;; turns into an MV-COMBINATION.
(make-mv-combination fun-cont)
+ ;; If there are no arguments, then we convert to a
+ ;; normal combination, ensuring that a MV-COMBINATION
+ ;; always has at least one argument. This can be
+ ;; regarded as an optimization, but it is more
+ ;; important for simplifying compilation of
+ ;; MV-COMBINATIONS.
(make-combination fun-cont))))
(ir1-convert start fun-cont
(if (and (consp fun) (eq (car fun) 'function))
fun
`(%coerce-callable-to-fun ,fun)))
(setf (continuation-dest fun-cont) node)
- (assert-continuation-type fun-cont
- (specifier-type '(or function symbol)))
(collect ((arg-conts))
(let ((this-start fun-cont))
(dolist (arg args)
\f
;;;; interface to defining macros
-;;;; FIXME:
-;;;; classic CMU CL comment:
-;;;; DEFMACRO and DEFUN expand into calls to %DEFxxx functions
-;;;; so that we get a chance to see what is going on. We define
-;;;; IR1 translators for these functions which look at the
-;;;; definition and then generate a call to the %%DEFxxx function.
-;;;; Alas, this implementation doesn't do the right thing for
-;;;; non-toplevel uses of these forms, so this should probably
-;;;; be changed to use EVAL-WHEN instead.
-
-;;; Return a new source path with any stuff intervening between the
-;;; current path and the first form beginning with NAME stripped off.
-;;; This is used to hide the guts of DEFmumble macros to prevent
-;;; annoying error messages.
+;;; Old CMUCL comment:
+;;;
+;;; Return a new source path with any stuff intervening between the
+;;; current path and the first form beginning with NAME stripped
+;;; off. This is used to hide the guts of DEFmumble macros to
+;;; prevent annoying error messages.
+;;;
+;;; Now that we have implementations of DEFmumble macros in terms of
+;;; EVAL-WHEN, this function is no longer used. However, it might be
+;;; worth figuring out why it was used, and maybe doing analogous
+;;; munging to the functions created in the expanders for the macros.
(defun revert-source-path (name)
(do ((path *current-path* (cdr path)))
((null path) *current-path*)
(when (or (eq first name)
(eq first 'original-source-start))
(return path)))))
-
-;;; Warn about incompatible or illegal definitions and add the macro
-;;; to the compiler environment.
-;;;
-;;; Someday we could check for macro arguments being incompatibly
-;;; redefined. Doing this right will involve finding the old macro
-;;; lambda-list and comparing it with the new one.
-(def-ir1-translator %defmacro ((qname qdef lambda-list doc) start cont
- :kind :function)
- (let (;; QNAME is typically a quoted name. I think the idea is to
- ;; let %DEFMACRO work as an ordinary function when
- ;; interpreting. Whatever the reason the quote is there, we
- ;; don't want it any more. -- WHN 19990603
- (name (eval qname))
- ;; QDEF should be a sharp-quoted definition. We don't want to
- ;; make a function of it just yet, so we just drop the
- ;; sharp-quote.
- (def (progn
- (aver (eq 'function (first qdef)))
- (aver (proper-list-of-length-p qdef 2))
- (second qdef))))
-
- (/show "doing IR1 translator for %DEFMACRO" name)
-
- (unless (symbolp name)
- (compiler-error "The macro name ~S is not a symbol." name))
-
- (ecase (info :function :kind name)
- ((nil))
- (:function
- (remhash name *free-funs*)
- (undefine-fun-name name)
- (compiler-warn
- "~S is being redefined as a macro when it was ~
- previously ~(~A~) to be a function."
- name
- (info :function :where-from name)))
- (:macro)
- (:special-form
- (compiler-error "The special form ~S can't be redefined as a macro."
- name)))
-
- (setf (info :function :kind name) :macro
- (info :function :where-from name) :defined
- (info :function :macro-function name) (coerce def 'function))
-
- (let* ((*current-path* (revert-source-path 'defmacro))
- (fun (ir1-convert-lambda def
- :debug-name (debug-namify "DEFMACRO ~S"
- name))))
- (setf (functional-arg-documentation fun) (eval lambda-list))
-
- (ir1-convert start cont `(%%defmacro ',name ,fun ,doc)))
-
- (when sb!xc:*compile-print*
- ;; FIXME: It would be nice to convert this, and the other places
- ;; which create compiler diagnostic output prefixed by
- ;; semicolons, to use some common utility which automatically
- ;; prefixes all its output with semicolons. (The addition of
- ;; semicolon prefixes was introduced ca. sbcl-0.6.8.10 as the
- ;; "MNA compiler message patch", and implemented by modifying a
- ;; bunch of output statements on a case-by-case basis, which
- ;; seems unnecessarily error-prone and unclear, scattering
- ;; implicit information about output style throughout the
- ;; system.) Starting by rewriting COMPILER-MUMBLE to add
- ;; semicolon prefixes would be a good start, and perhaps also:
- ;; * Add semicolon prefixes for "FOO assembled" messages emitted
- ;; when e.g. src/assembly/x86/assem-rtns.lisp is processed.
- ;; * At least some debugger output messages deserve semicolon
- ;; prefixes too:
- ;; ** restarts table
- ;; ** "Within the debugger, you can type HELP for help."
- (compiler-mumble "~&; converted ~S~%" name))))
-
-(def-ir1-translator %define-compiler-macro ((name def lambda-list doc)
- start cont
- :kind :function)
- (let ((name (eval name))
- (def (second def))) ; We don't want to make a function just yet...
-
- (when (eq (info :function :kind name) :special-form)
- (compiler-error "attempt to define a compiler-macro for special form ~S"
- name))
-
- (setf (info :function :compiler-macro-function name)
- (coerce def 'function))
-
- (let* ((*current-path* (revert-source-path 'define-compiler-macro))
- (fun (ir1-convert-lambda def
- :debug-name (debug-namify
- "DEFINE-COMPILER-MACRO ~S"
- name))))
- (setf (functional-arg-documentation fun) (eval lambda-list))
-
- (ir1-convert start cont `(%%define-compiler-macro ',name ,fun ,doc)))
-
- (when sb!xc:*compile-print*
- (compiler-mumble "~&; converted ~S~%" name))))
projects / sbcl.git / blobdiff