X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fir1-translators.lisp;h=7f200433237d5dc5fc13a5a2ccbd7c0d89738596;hb=942e45e3bb73fd55786e4a0ab4590324063c0c89;hp=fd4aa84442fbaa1cd709bf0361b4759b31d472c0;hpb=269554bcae55d7e502992ea20932f71790066483;p=sbcl.git diff --git a/src/compiler/ir1-translators.lisp b/src/compiler/ir1-translators.lisp index fd4aa84..7f20043 100644 --- a/src/compiler/ir1-translators.lisp +++ b/src/compiler/ir1-translators.lisp @@ -14,43 +14,42 @@ ;;;; special forms for control -(def-ir1-translator progn ((&rest forms) start cont) +(def-ir1-translator progn ((&rest forms) start next result) #!+sb-doc "Progn Form* Evaluates each Form in order, returning the values of the last form. With no forms, returns NIL." - (ir1-convert-progn-body start cont forms)) + (ir1-convert-progn-body start next result forms)) -(def-ir1-translator if ((test then &optional else) start cont) +(def-ir1-translator if ((test then &optional else) start next result) #!+sb-doc "If Predicate Then [Else] If Predicate evaluates to non-null, evaluate Then and returns its values, otherwise evaluate Else and return its values. Else defaults to NIL." - (let* ((pred (make-continuation)) - (then-cont (make-continuation)) - (then-block (continuation-starts-block then-cont)) - (else-cont (make-continuation)) - (else-block (continuation-starts-block else-cont)) - (dummy-cont (make-continuation)) - (node (make-if :test pred - :consequent then-block - :alternative else-block))) + (let* ((pred-ctran (make-ctran)) + (pred-lvar (make-lvar)) + (then-ctran (make-ctran)) + (then-block (ctran-starts-block then-ctran)) + (else-ctran (make-ctran)) + (else-block (ctran-starts-block else-ctran)) + (node (make-if :test pred-lvar + :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) - (use-continuation node dummy-cont) + (setf (lvar-dest pred-lvar) node) + (ir1-convert start pred-ctran pred-lvar test) + (link-node-to-previous-ctran node pred-ctran) - (let ((start-block (continuation-block pred))) + (let ((start-block (ctran-block pred-ctran))) (setf (block-last start-block) node) - (continuation-starts-block cont) + (ctran-starts-block next) (link-blocks start-block then-block) (link-blocks start-block else-block)) - (ir1-convert then-cont cont then) - (ir1-convert else-cont cont else))) + (ir1-convert then-ctran next result then) + (ir1-convert else-ctran next result else))) ;;;; BLOCK and TAGBODY @@ -59,10 +58,10 @@ ;;;; node. ;;; Make a :ENTRY cleanup and emit an ENTRY node, then convert the -;;; body in the modified environment. We make CONT start a block now, +;;; body in the modified environment. We make NEXT start a block now, ;;; since if it was done later, the block would be in the wrong ;;; environment. -(def-ir1-translator block ((name &rest forms) start cont) +(def-ir1-translator block ((name &rest forms) start next result) #!+sb-doc "Block Name Form* Evaluate the Forms as a PROGN. Within the lexical scope of the body, @@ -70,32 +69,32 @@ result of Value-Form." (unless (symbolp name) (compiler-error "The block name ~S is not a symbol." name)) - (continuation-starts-block cont) - (let* ((dummy (make-continuation)) - (entry (make-entry)) - (cleanup (make-cleanup :kind :block - :mess-up entry))) + (start-block start) + (ctran-starts-block next) + (let* ((dummy (make-ctran)) + (entry (make-entry)) + (cleanup (make-cleanup :kind :block + :mess-up entry))) (push entry (lambda-entries (lexenv-lambda *lexenv*))) (setf (entry-cleanup entry) cleanup) - (link-node-to-previous-continuation entry start) - (use-continuation entry dummy) + (link-node-to-previous-ctran entry start) + (use-ctran entry dummy) - (let* ((env-entry (list entry cont)) + (let* ((env-entry (list entry next result)) (*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)))) + :cleanup cleanup))) + (ir1-convert-progn-body dummy next result forms)))) -(def-ir1-translator return-from ((name &optional value) start cont) +(def-ir1-translator return-from ((name &optional value) start next result) #!+sb-doc "Return-From Block-Name Value-Form Evaluate the Value-Form, returning its values from the lexically enclosing BLOCK Block-Name. This is constrained to be used only within the dynamic extent of the BLOCK." - ;; CMU CL comment: - ;; We make CONT start a block just so that it will have a block - ;; assigned. People assume that when they pass a continuation into - ;; IR1-CONVERT as CONT, it will have a block when it is done. + ;; old comment: + ;; We make NEXT start a block just so that it will have a block + ;; assigned. People assume that when they pass a ctran into + ;; IR1-CONVERT as NEXT, it will have a block when it is done. ;; KLUDGE: Note that this block is basically fictitious. In the code ;; (BLOCK B (RETURN-FROM B) (SETQ X 3)) ;; it's the block which answers the question "which block is @@ -106,21 +105,26 @@ ;; BLOCK-HOME-LAMBDA-OR-NULL) more obscure, and it might be better ;; to get rid of it, perhaps using a special placeholder value ;; to indicate the orphanedness of the code. - (continuation-starts-block cont) + (declare (ignore result)) + (ctran-starts-block next) (let* ((found (or (lexenv-find name blocks) - (compiler-error "return for unknown block: ~S" name))) - (value-cont (make-continuation)) - (entry (first found)) - (exit (make-exit :entry entry - :value value-cont))) + (compiler-error "return for unknown block: ~S" name))) + (exit-ctran (second found)) + (value-ctran (make-ctran)) + (value-lvar (make-lvar)) + (entry (first found)) + (exit (make-exit :entry entry + :value value-lvar))) + (when (ctran-deleted-p exit-ctran) + (throw 'locall-already-let-converted exit-ctran)) (push exit (entry-exits entry)) - (setf (continuation-dest value-cont) exit) - (ir1-convert start value-cont value) - (link-node-to-previous-continuation exit value-cont) - (let ((home-lambda (continuation-home-lambda-or-null start))) + (setf (lvar-dest value-lvar) exit) + (ir1-convert start value-ctran value-lvar value) + (link-node-to-previous-ctran exit value-ctran) + (let ((home-lambda (ctran-home-lambda-or-null start))) (when home-lambda - (push entry (lambda-calls-or-closes home-lambda)))) - (use-continuation exit (second found)))) + (push entry (lambda-calls-or-closes home-lambda)))) + (use-continuation exit exit-ctran (third found)))) ;;; Return a list of the segments of a TAGBODY. Each segment looks ;;; like (
* (go )). That is, we break up the @@ -134,26 +138,26 @@ (collect ((segments)) (let ((current (cons nil body))) (loop - (let ((tag-pos (position-if (complement #'listp) current :start 1))) - (unless tag-pos - (segments `(,@current nil)) - (return)) - (let ((tag (elt current tag-pos))) - (when (assoc tag (segments)) - (compiler-error - "The tag ~S appears more than once in the tagbody." - tag)) - (unless (or (symbolp tag) (integerp tag)) - (compiler-error "~S is not a legal tagbody statement." tag)) - (segments `(,@(subseq current 0 tag-pos) (go ,tag)))) - (setq current (nthcdr tag-pos current))))) + (let ((tag-pos (position-if (complement #'listp) current :start 1))) + (unless tag-pos + (segments `(,@current nil)) + (return)) + (let ((tag (elt current tag-pos))) + (when (assoc tag (segments)) + (compiler-error + "The tag ~S appears more than once in the tagbody." + tag)) + (unless (or (symbolp tag) (integerp tag)) + (compiler-error "~S is not a legal tagbody statement." tag)) + (segments `(,@(subseq current 0 tag-pos) (go ,tag)))) + (setq current (nthcdr tag-pos current))))) (segments))) ;;; Set up the cleanup, emitting the entry node. Then make a block for ;;; each tag, building up the tag list for LEXENV-TAGS as we go. ;;; Finally, convert each segment with the precomputed Start and Cont ;;; values. -(def-ir1-translator tagbody ((&rest statements) start cont) +(def-ir1-translator tagbody ((&rest statements) start next result) #!+sb-doc "Tagbody {Tag | Statement}* Define tags for used with GO. The Statements are evaluated in order @@ -162,54 +166,56 @@ to the next statement following that tag. A Tag must an integer or a symbol. A statement must be a list. Other objects are illegal within the body." - (continuation-starts-block cont) - (let* ((dummy (make-continuation)) - (entry (make-entry)) - (segments (parse-tagbody statements)) - (cleanup (make-cleanup :kind :tagbody - :mess-up entry))) + (start-block start) + (ctran-starts-block next) + (let* ((dummy (make-ctran)) + (entry (make-entry)) + (segments (parse-tagbody statements)) + (cleanup (make-cleanup :kind :tagbody + :mess-up entry))) (push entry (lambda-entries (lexenv-lambda *lexenv*))) (setf (entry-cleanup entry) cleanup) - (link-node-to-previous-continuation entry start) - (use-continuation entry dummy) + (link-node-to-previous-ctran entry start) + (use-ctran entry dummy) (collect ((tags) - (starts) - (conts)) + (starts) + (ctrans)) (starts dummy) (dolist (segment (rest segments)) - (let* ((tag-cont (make-continuation)) - (tag (list (car segment) entry tag-cont))) - (conts tag-cont) - (starts tag-cont) - (continuation-starts-block tag-cont) - (tags tag) - (push (cdr tag) (continuation-lexenv-uses tag-cont)))) - (conts cont) + (let* ((tag-ctran (make-ctran)) + (tag (list (car segment) entry tag-ctran))) + (ctrans tag-ctran) + (starts tag-ctran) + (ctran-starts-block tag-ctran) + (tags tag))) + (ctrans next) (let ((*lexenv* (make-lexenv :cleanup cleanup :tags (tags)))) - (mapc (lambda (segment start cont) - (ir1-convert-progn-body start cont (rest segment))) - segments (starts) (conts)))))) + (mapc (lambda (segment start end) + (ir1-convert-progn-body start end + (when (eq end next) result) + (rest segment))) + segments (starts) (ctrans)))))) ;;; Emit an EXIT node without any value. -(def-ir1-translator go ((tag) start cont) +(def-ir1-translator go ((tag) start next result) #!+sb-doc "Go Tag Transfer control to the named Tag in the lexically enclosing TAGBODY. This is constrained to be used only within the dynamic extent of the TAGBODY." - (continuation-starts-block cont) + (ctran-starts-block next) (let* ((found (or (lexenv-find tag tags :test #'eql) - (compiler-error "attempt to GO to nonexistent tag: ~S" - tag))) - (entry (first found)) - (exit (make-exit :entry entry))) + (compiler-error "attempt to GO to nonexistent tag: ~S" + tag))) + (entry (first found)) + (exit (make-exit :entry entry))) (push exit (entry-exits entry)) - (link-node-to-previous-continuation exit start) - (let ((home-lambda (continuation-home-lambda-or-null start))) + (link-node-to-previous-ctran exit start) + (let ((home-lambda (ctran-home-lambda-or-null start))) (when home-lambda - (push entry (lambda-calls-or-closes home-lambda)))) - (use-continuation exit (second found)))) + (push entry (lambda-calls-or-closes home-lambda)))) + (use-ctran exit (second found)))) ;;;; translators for compiler-magic special forms @@ -225,14 +231,14 @@ ;;; 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. -(def-ir1-translator eval-when ((situations &rest forms) start cont) +(def-ir1-translator eval-when ((situations &rest forms) start next result) #!+sb-doc "EVAL-WHEN (Situation*) Form* Evaluate the Forms in the specified Situations (any of :COMPILE-TOPLEVEL, :LOAD-TOPLEVEL, or :EXECUTE, or (deprecated) COMPILE, LOAD, or EVAL)." (multiple-value-bind (ct lt e) (parse-eval-when-situations situations) (declare (ignore ct lt)) - (ir1-convert-progn-body start cont (and e forms))) + (ir1-convert-progn-body start next result (and e forms))) (values)) ;;; common logic for MACROLET and SYMBOL-MACROLET @@ -241,9 +247,9 @@ ;;; in-lexenv representation, stuff the results into *LEXENV*, and ;;; call FUN (with no arguments). (defun %funcall-in-foomacrolet-lexenv (definitionize-fun - definitionize-keyword - definitions - fun) + definitionize-keyword + definitions + fun) (declare (type function definitionize-fun fun)) (declare (type (member :vars :funs) definitionize-keyword)) (declare (type list definitions)) @@ -252,6 +258,8 @@ (compiler-style-warn "duplicate definitions in ~S" definitions)) (let* ((processed-definitions (mapcar definitionize-fun definitions)) (*lexenv* (make-lexenv definitionize-keyword processed-definitions))) + ;; I wonder how much of an compiler performance penalty this + ;; non-constant keyword is. (funcall fun definitionize-keyword processed-definitions))) ;;; Tweak LEXENV to include the DEFINITIONS from a MACROLET, then @@ -263,9 +271,9 @@ ;;; EVAL can likewise make use of it. (defun macrolet-definitionize-fun (context lexenv) (flet ((fail (control &rest args) - (ecase context - (:compile (apply #'compiler-error control args)) - (:eval (error 'simple-program-error + (ecase context + (:compile (apply #'compiler-error control args)) + (:eval (error 'simple-program-error :format-control control :format-arguments args))))) (lambda (definition) @@ -275,6 +283,9 @@ (destructuring-bind (name arglist &body body) definition (unless (symbolp name) (fail "The local macro name ~S is not a symbol." name)) + (when (fboundp name) + (compiler-assert-symbol-home-package-unlocked + name "binding ~A as a local macro")) (unless (listp arglist) (fail "The local macro argument list ~S is not a list." arglist)) @@ -297,7 +308,7 @@ definitions fun)) -(def-ir1-translator macrolet ((definitions &rest body) start cont) +(def-ir1-translator macrolet ((definitions &rest body) start next result) #!+sb-doc "MACROLET ({(Name Lambda-List Form*)}*) Body-Form* Evaluate the Body-Forms in an environment with the specified local macros @@ -307,14 +318,14 @@ definitions (lambda (&key funs) (declare (ignore funs)) - (ir1-translate-locally body start cont)) + (ir1-translate-locally body start next result)) :compile)) (defun symbol-macrolet-definitionize-fun (context) (flet ((fail (control &rest args) - (ecase context - (:compile (apply #'compiler-error control args)) - (:eval (error 'simple-program-error + (ecase context + (:compile (apply #'compiler-error control args)) + (:eval (error 'simple-program-error :format-control control :format-arguments args))))) (lambda (definition) @@ -323,11 +334,15 @@ (destructuring-bind (name expansion) definition (unless (symbolp name) (fail "The local symbol macro name ~S is not a symbol." name)) + (when (or (boundp name) (eq (info :variable :kind name) :macro)) + (compiler-assert-symbol-home-package-unlocked + name "binding ~A as a local symbol-macro")) (let ((kind (info :variable :kind name))) (when (member kind '(:special :constant)) (fail "Attempt to bind a ~(~A~) variable with SYMBOL-MACROLET: ~S" kind name))) - `(,name . (MACRO . ,expansion)))))) + ;; A magical cons that MACROEXPAND-1 understands. + `(,name . (macro . ,expansion)))))) (defun funcall-in-symbol-macrolet-lexenv (definitions fun context) (%funcall-in-foomacrolet-lexenv @@ -336,7 +351,8 @@ definitions fun)) -(def-ir1-translator symbol-macrolet ((macrobindings &body body) start cont) +(def-ir1-translator symbol-macrolet + ((macrobindings &body body) start next result) #!+sb-doc "SYMBOL-MACROLET ({(Name Expansion)}*) Decl* Form* Define the Names as symbol macros with the given Expansions. Within the @@ -344,7 +360,7 @@ (funcall-in-symbol-macrolet-lexenv macrobindings (lambda (&key vars) - (ir1-translate-locally body start cont :vars vars)) + (ir1-translate-locally body start next result :vars vars)) :compile)) ;;;; %PRIMITIVE @@ -358,7 +374,7 @@ (handler-case (mapcar #'eval args) (error (condition) (compiler-error "Lisp error during evaluation of info args:~%~A" - condition)))) + condition)))) ;;; Convert to the %%PRIMITIVE funny function. The first argument is ;;; the template, the second is a list of the results of any @@ -375,27 +391,27 @@ ;;; BACKEND-TEMPLATE-NAMES to BACKEND-VOPS, and rename %PRIMITIVE to ;;; 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) +(def-ir1-translator %primitive ((name &rest args) start next result) (declare (type symbol name)) (let* ((template (or (gethash name *backend-template-names*) - (bug "undefined primitive ~A" name))) - (required (length (template-arg-types template))) - (info (template-info-arg-count template)) - (min (+ required info)) - (nargs (length args))) + (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) - (bug "Primitive ~A was called with ~R argument~:P, ~ - but wants at least ~R." - name - nargs - min)) - (unless (= nargs min) - (bug "Primitive ~A was called with ~R argument~:P, ~ + (when (< nargs min) + (bug "Primitive ~A was called with ~R argument~:P, ~ + but wants at least ~R." + name + nargs + min)) + (unless (= nargs min) + (bug "Primitive ~A was called with ~R argument~:P, ~ but wants exactly ~R." - name - nargs - min))) + name + nargs + min))) (when (eq (template-result-types template) :conditional) (bug "%PRIMITIVE was used with a conditional template.")) @@ -403,46 +419,75 @@ (when (template-more-results-type template) (bug "%PRIMITIVE was used with an unknown values template.")) - (ir1-convert start - cont - `(%%primitive ',template - ',(eval-info-args - (subseq args required min)) - ,@(subseq args 0 required) - ,@(subseq args min))))) + (ir1-convert start next result + `(%%primitive ',template + ',(eval-info-args + (subseq args required min)) + ,@(subseq args 0 required) + ,@(subseq args min))))) ;;;; QUOTE -(def-ir1-translator quote ((thing) start cont) +(def-ir1-translator quote ((thing) start next result) #!+sb-doc "QUOTE Value Return Value without evaluating it." - (reference-constant start cont thing)) + (reference-constant start next result thing)) ;;;; FUNCTION and NAMED-LAMBDA +(defun name-lambdalike (thing) + (ecase (car thing) + ((named-lambda) + (second thing)) + ((lambda instance-lambda) + `(lambda ,(second thing))) + ((lambda-with-lexenv)' + `(lambda ,(fifth thing))))) + (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) + ((member (car thing) + '(lambda named-lambda instance-lambda lambda-with-lexenv)) + (values (ir1-convert-lambdalike + thing + :debug-name (name-lambdalike thing)) + t)) + ((legal-fun-name-p thing) + (values (find-lexically-apparent-fun + thing "as the argument to FUNCTION") + nil)) + (t + (compiler-error "~S is not a legal function name." thing))) + (values (find-lexically-apparent-fun + thing "as the argument to FUNCTION") + nil))) + +(def-ir1-translator %%allocate-closures ((&rest leaves) start next result) + (aver (eq result 'nil)) + (let ((lambdas leaves)) + (ir1-convert start next result `(%allocate-closures ',lambdas)) + (let ((allocator (node-dest (ctran-next start)))) + (dolist (lambda lambdas) + (setf (functional-allocator lambda) allocator))))) + +(defmacro with-fun-name-leaf ((leaf thing start) &body body) + `(multiple-value-bind (,leaf allocate-p) (fun-name-leaf ,thing) + (if allocate-p + (let ((.new-start. (make-ctran))) + (ir1-convert ,start .new-start. nil `(%%allocate-closures ,leaf)) + (let ((,start .new-start.)) + ,@body)) + (locally + ,@body)))) + +(def-ir1-translator function ((thing) start next result) #!+sb-doc "FUNCTION Name Return the lexically apparent definition of the function Name. Name may also be a lambda expression." - (reference-leaf start cont (fun-name-leaf thing))) + (with-fun-name-leaf (leaf thing start) + (reference-leaf start next result leaf))) ;;;; FUNCALL @@ -452,18 +497,20 @@ (deftransform funcall ((function &rest args) * *) (let ((arg-names (make-gensym-list (length args)))) `(lambda (function ,@arg-names) - (%funcall ,(if (csubtypep (continuation-type function) - (specifier-type 'function)) - 'function - '(%coerce-callable-to-fun function)) - ,@arg-names)))) + (%funcall ,(if (csubtypep (lvar-type function) + (specifier-type 'function)) + 'function + '(%coerce-callable-to-fun function)) + ,@arg-names)))) -(def-ir1-translator %funcall ((function &rest args) start cont) +(def-ir1-translator %funcall ((function &rest args) start next result) (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)))) + (with-fun-name-leaf (leaf (second function) start) + (ir1-convert start next result `(,leaf ,@args))) + (let ((ctran (make-ctran)) + (fun-lvar (make-lvar))) + (ir1-convert start ctran fun-lvar `(the function ,function)) + (ir1-convert-combination-args fun-lvar ctran next result args)))) ;;; This source transform exists to reduce the amount of work for the ;;; compiler. If the called function is a FUNCTION form, then convert @@ -474,8 +521,7 @@ `(%funcall ,function ,@args) (values nil t))) -(deftransform %coerce-callable-to-fun ((thing) (function) * - :important t) +(deftransform %coerce-callable-to-fun ((thing) (function) *) "optimize away possible call to FDEFINITION at runtime" 'thing) @@ -493,64 +539,85 @@ ;;; variables are marked as such. Context is the name of the form, for ;;; error reporting purposes. (declaim (ftype (function (list symbol) (values list list)) - extract-let-vars)) + extract-let-vars)) (defun extract-let-vars (bindings context) (collect ((vars) - (vals) - (names)) + (vals) + (names)) (flet ((get-var (name) - (varify-lambda-arg name - (if (eq context 'let*) - nil - (names))))) + (varify-lambda-arg name + (if (eq context 'let*) + nil + (names))))) (dolist (spec bindings) - (cond ((atom spec) - (let ((var (get-var spec))) - (vars var) - (names spec) - (vals nil))) - (t - (unless (proper-list-of-length-p spec 1 2) - (compiler-error "The ~S binding spec ~S is malformed." - context - spec)) - (let* ((name (first spec)) - (var (get-var name))) - (vars var) - (names name) - (vals (second spec))))))) - + (cond ((atom spec) + (let ((var (get-var spec))) + (vars var) + (names spec) + (vals nil))) + (t + (unless (proper-list-of-length-p spec 1 2) + (compiler-error "The ~S binding spec ~S is malformed." + context + spec)) + (let* ((name (first spec)) + (var (get-var name))) + (vars var) + (names name) + (vals (second spec))))))) + (dolist (name (names)) + (when (eq (info :variable :kind name) :macro) + (compiler-assert-symbol-home-package-unlocked + name "lexically binding symbol-macro ~A"))) (values (vars) (vals)))) -(def-ir1-translator let ((bindings &body body) - start cont) +(def-ir1-translator let ((bindings &body body) start next result) #!+sb-doc "LET ({(Var [Value]) | Var}*) Declaration* Form* 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." - (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)))))) + (cond ((null bindings) + (ir1-translate-locally body start next result)) + ((listp bindings) + (multiple-value-bind (forms decls) + (parse-body body :doc-string-allowed nil) + (multiple-value-bind (vars values) (extract-let-vars bindings 'let) + (binding* ((ctran (make-ctran)) + (fun-lvar (make-lvar)) + ((next result) + (processing-decls (decls vars nil next result + post-binding-lexenv) + (let ((fun (ir1-convert-lambda-body + forms + vars + :post-binding-lexenv post-binding-lexenv + :debug-name (debug-name 'let bindings)))) + (reference-leaf start ctran fun-lvar fun)) + (values next result)))) + (ir1-convert-combination-args fun-lvar ctran next result values))))) + (t + (compiler-error "Malformed LET bindings: ~S." bindings)))) (def-ir1-translator let* ((bindings &body body) - start cont) + start next result) #!+sb-doc "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) (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))))) + (if (listp bindings) + (multiple-value-bind (forms decls) + (parse-body body :doc-string-allowed nil) + (multiple-value-bind (vars values) (extract-let-vars bindings 'let*) + (processing-decls (decls vars nil start next post-binding-lexenv) + (ir1-convert-aux-bindings start + next + result + forms + vars + values + post-binding-lexenv)))) + (compiler-error "Malformed LET* bindings: ~S." bindings))) ;;; logic shared between IR1 translators for LOCALLY, MACROLET, ;;; and SYMBOL-MACROLET @@ -559,19 +626,20 @@ ;;; 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 &key vars funs) - (declare (type list body) (type continuation start cont)) - (multiple-value-bind (forms decls) (parse-body body nil) - (let ((*lexenv* (process-decls decls vars funs cont))) - (ir1-convert-progn-body start cont forms)))) +(defun ir1-translate-locally (body start next result &key vars funs) + (declare (type ctran start next) (type (or lvar null) result) + (type list body)) + (multiple-value-bind (forms decls) (parse-body body :doc-string-allowed nil) + (processing-decls (decls vars funs next result) + (ir1-convert-progn-body start next result forms)))) -(def-ir1-translator locally ((&body body) start cont) +(def-ir1-translator locally ((&body body) start next result) #!+sb-doc "LOCALLY Declaration* Form* Sequentially evaluate the Forms in a lexical environment where the the Declarations have effect. If LOCALLY is a top level form, then the Forms are also processed as top level forms." - (ir1-translate-locally body start cont)) + (ir1-translate-locally body start next result)) ;;;; FLET and LABELS @@ -584,96 +652,119 @@ (declaim (ftype (function (list symbol) (values list list)) extract-flet-vars)) (defun extract-flet-vars (definitions context) (collect ((names) - (defs)) + (defs)) (dolist (def definitions) (when (or (atom def) (< (length def) 2)) - (compiler-error "The ~S definition spec ~S is malformed." context def)) + (compiler-error "The ~S definition spec ~S is malformed." context def)) (let ((name (first def))) - (check-fun-name name) - (names name) - (multiple-value-bind (forms decls) (parse-body (cddr def)) - (defs `(lambda ,(second def) - ,@decls - (block ,(fun-name-block-name name) - . ,forms)))))) + (check-fun-name name) + (when (fboundp name) + (compiler-assert-symbol-home-package-unlocked + name "binding ~A as a local function")) + (names name) + (multiple-value-bind (forms decls) (parse-body (cddr def)) + (defs `(lambda ,(second def) + ,@decls + (block ,(fun-name-block-name name) + . ,forms)))))) (values (names) (defs)))) +(defun ir1-convert-fbindings (start next result funs body) + (let ((ctran (make-ctran)) + (dx-p (find-if #'leaf-dynamic-extent funs))) + (when dx-p + (ctran-starts-block ctran) + (ctran-starts-block next)) + (ir1-convert start ctran nil `(%%allocate-closures ,@funs)) + (cond (dx-p + (let* ((dummy (make-ctran)) + (entry (make-entry)) + (cleanup (make-cleanup :kind :dynamic-extent + :mess-up entry + :info (list (node-dest + (ctran-next start)))))) + (push entry (lambda-entries (lexenv-lambda *lexenv*))) + (setf (entry-cleanup entry) cleanup) + (link-node-to-previous-ctran entry ctran) + (use-ctran entry dummy) + + (let ((*lexenv* (make-lexenv :cleanup cleanup))) + (ir1-convert-progn-body dummy next result body)))) + (t (ir1-convert-progn-body ctran next result body))))) + (def-ir1-translator flet ((definitions &body body) - start cont) + start next result) #!+sb-doc "FLET ({(Name Lambda-List Declaration* Form*)}*) Declaration* Body-Form* 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) (parse-body body nil) + (multiple-value-bind (forms decls) + (parse-body body :doc-string-allowed 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) - :allow-debug-catch-tag t)) - names defs)) - (*lexenv* (make-lexenv - :default (process-decls decls nil fvars cont) - :funs (pairlis names fvars)))) - (ir1-convert-progn-body start cont forms))))) - -(def-ir1-translator labels ((definitions &body body) start cont) + (extract-flet-vars definitions 'flet) + (let ((fvars (mapcar (lambda (n d) + (ir1-convert-lambda d + :source-name n + :debug-name (debug-name 'flet n))) + names defs))) + (processing-decls (decls nil fvars next result) + (let ((*lexenv* (make-lexenv :funs (pairlis names fvars)))) + (ir1-convert-fbindings start next result fvars forms))))))) + +(def-ir1-translator labels ((definitions &body body) start next result) #!+sb-doc "LABELS ({(Name Lambda-List Declaration* Form*)}*) Declaration* Body-Form* 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) (parse-body body nil) + (multiple-value-bind (forms decls) (parse-body body :doc-string-allowed nil) (multiple-value-bind (names defs) - (extract-flet-vars definitions 'labels) + (extract-flet-vars definitions 'labels) (let* (;; dummy LABELS functions, to be used as placeholders ;; during construction of real LABELS functions - (placeholder-funs (mapcar (lambda (name) - (make-functional - :%source-name name - :%debug-name (debug-namify - "LABELS placeholder ~S" - name))) - names)) - ;; (like PAIRLIS but guaranteed to preserve ordering:) - (placeholder-fenv (mapcar #'cons names placeholder-funs)) + (placeholder-funs (mapcar (lambda (name) + (make-functional + :%source-name name + :%debug-name (debug-name + 'labels-placeholder + name))) + names)) + ;; (like PAIRLIS but guaranteed to preserve ordering:) + (placeholder-fenv (mapcar #'cons names placeholder-funs)) ;; the real LABELS functions, compiled in a LEXENV which ;; includes the dummy LABELS functions - (real-funs - (let ((*lexenv* (make-lexenv :funs placeholder-fenv))) - (mapcar (lambda (name def) - (ir1-convert-lambda def - :source-name name - :debug-name (debug-namify - "LABELS ~S" name) - :allow-debug-catch-tag t)) - names defs)))) + (real-funs + (let ((*lexenv* (make-lexenv :funs placeholder-fenv))) + (mapcar (lambda (name def) + (ir1-convert-lambda def + :source-name name + :debug-name (debug-name 'labels name))) + names defs)))) ;; Modify all the references to the dummy function leaves so ;; that they point to the real function leaves. - (loop for real-fun in real-funs and - placeholder-cons in placeholder-fenv do - (substitute-leaf real-fun (cdr placeholder-cons)) - (setf (cdr placeholder-cons) real-fun)) + (loop for real-fun in real-funs and + placeholder-cons in placeholder-fenv do + (substitute-leaf real-fun (cdr placeholder-cons)) + (setf (cdr placeholder-cons) real-fun)) ;; Voila. - (let ((*lexenv* (make-lexenv - :default (process-decls decls nil real-funs cont) - ;; Use a proper FENV here (not the - ;; placeholder used earlier) so that if the - ;; lexical environment is used for inline - ;; expansion we'll get the right functions. - :funs (pairlis names real-funs)))) - (ir1-convert-progn-body start cont forms)))))) + (processing-decls (decls nil real-funs next result) + (let ((*lexenv* (make-lexenv + ;; Use a proper FENV here (not the + ;; placeholder used earlier) so that if the + ;; lexical environment is used for inline + ;; expansion we'll get the right functions. + :funs (pairlis names real-funs)))) + (ir1-convert-fbindings start next result real-funs forms))))))) + ;;;; the THE special operator, and friends ;;; A logic shared among THE and TRULY-THE. -(defun the-in-policy (type value policy start cont) +(defun the-in-policy (type value policy start next result) (let ((type (if (ctype-p type) type (compiler-values-specifier-type type)))) (cond ((or (eq type *wild-type*) @@ -684,38 +775,35 @@ (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))))))) + (ir1-convert start next result value)) + (t (let ((value-ctran (make-ctran)) + (value-lvar (make-lvar))) + (ir1-convert start value-ctran value-lvar value) + (let ((cast (make-cast value-lvar type policy))) + (link-node-to-previous-ctran cast value-ctran) + (setf (lvar-dest value-lvar) cast) + (use-continuation cast next result))))))) ;;; Assert that FORM evaluates to the specified type (which may be a ;;; 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) - (the-in-policy type value (lexenv-policy *lexenv*) start cont)) +(def-ir1-translator the ((type value) start next result) + (the-in-policy type value (lexenv-policy *lexenv*) start next result)) ;;; 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. -(def-ir1-translator truly-the ((type value) start cont) +(def-ir1-translator truly-the ((type value) start next result) #!+sb-doc "" - (declare (inline member)) #-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)))) + (old (when result (find-uses result)))) + (ir1-convert start next result value) + (when result + (do-uses (use result) + (unless (memq use old) + (derive-node-type use type))))) #+nil (the-in-policy type value '((type-check . 0)) start cont)) @@ -724,69 +812,72 @@ ;;; If there is a definition in LEXENV-VARS, just set that, otherwise ;;; look at the global information. If the name is for a constant, ;;; then error out. -(def-ir1-translator setq ((&whole source &rest things) start cont) +(def-ir1-translator setq ((&whole source &rest things) start next result) (let ((len (length things))) (when (oddp len) (compiler-error "odd number of args to SETQ: ~S" source)) (if (= len 2) - (let* ((name (first things)) - (leaf (or (lexenv-find name vars) - (find-free-var name)))) - (etypecase leaf - (leaf - (when (constant-p leaf) - (compiler-error "~S is a constant and thus can't be set." name)) - (when (lambda-var-p leaf) - (let ((home-lambda (continuation-home-lambda-or-null start))) - (when home-lambda - (pushnew leaf (lambda-calls-or-closes home-lambda)))) - (when (lambda-var-ignorep leaf) - ;; ANSI's definition of "Declaration IGNORE, IGNORABLE" - ;; requires that this be a STYLE-WARNING, not a full warning. - (compiler-style-warn - "~S is being set even though it was declared to be ignored." - name))) - (setq-var start cont leaf (second things))) - (cons - (aver (eq (car leaf) 'MACRO)) + (let* ((name (first things)) + (leaf (or (lexenv-find name vars) + (find-free-var name)))) + (etypecase leaf + (leaf + (when (constant-p leaf) + (compiler-error "~S is a constant and thus can't be set." name)) + (when (lambda-var-p leaf) + (let ((home-lambda (ctran-home-lambda-or-null start))) + (when home-lambda + (pushnew leaf (lambda-calls-or-closes home-lambda)))) + (when (lambda-var-ignorep leaf) + ;; ANSI's definition of "Declaration IGNORE, IGNORABLE" + ;; requires that this be a STYLE-WARNING, not a full warning. + (compiler-style-warn + "~S is being set even though it was declared to be ignored." + name))) + (setq-var start next result 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 - `(%set-heap-alien ',leaf ,(second things)))))) - (collect ((sets)) - (do ((thing things (cddr thing))) - ((endp thing) - (ir1-convert-progn-body start cont (sets))) - (sets `(setq ,(first thing) ,(second thing)))))))) + (ir1-convert start next result + `(setf ,(cdr leaf) ,(second things)))) + (heap-alien-info + (ir1-convert start next result + `(%set-heap-alien ',leaf ,(second things)))))) + (collect ((sets)) + (do ((thing things (cddr thing))) + ((endp thing) + (ir1-convert-progn-body start next result (sets))) + (sets `(setq ,(first thing) ,(second thing)))))))) ;;; This is kind of like REFERENCE-LEAF, but we generate a SET node. ;;; 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)) +(defun setq-var (start next result var value) + (declare (type ctran start next) (type (or lvar null) result) + (type basic-var var)) + (let ((dest-ctran (make-ctran)) + (dest-lvar (make-lvar)) (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) + (ir1-convert start dest-ctran dest-lvar `(the ,type ,value)) + (let ((res (make-set :var var :value dest-lvar))) + (setf (lvar-dest dest-lvar) res) (setf (leaf-ever-used var) t) (push res (basic-var-sets var)) - (link-node-to-previous-continuation res dest) - (use-continuation res cont)))) + (link-node-to-previous-ctran res dest-ctran) + (use-continuation res next result)))) ;;;; CATCH, THROW and UNWIND-PROTECT ;;; 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) +(def-ir1-translator throw ((tag result) start next result-lvar) #!+sb-doc "Throw Tag Form Do a non-local exit, return the values of Form from the CATCH whose tag evaluates to the same thing as Tag." - (ir1-convert start cont - `(multiple-value-call #'%throw ,tag ,result))) + (ir1-convert start next result-lvar + `(multiple-value-call #'%throw ,tag ,result))) ;;; This is a special special form used to instantiate a cleanup as ;;; the current cleanup within the body. KIND is the kind of cleanup @@ -795,18 +886,19 @@ ;;; and introduce the cleanup into the lexical environment. We ;;; back-patch the ENTRY-CLEANUP for the current cleanup to be the new ;;; cleanup, since this inner cleanup is the interesting one. -(def-ir1-translator %within-cleanup ((kind mess-up &body body) start cont) - (let ((dummy (make-continuation)) - (dummy2 (make-continuation))) - (ir1-convert start dummy mess-up) - (let* ((mess-node (continuation-use dummy)) - (cleanup (make-cleanup :kind kind - :mess-up mess-node)) - (old-cup (lexenv-cleanup *lexenv*)) - (*lexenv* (make-lexenv :cleanup cleanup))) +(def-ir1-translator %within-cleanup + ((kind mess-up &body body) start next result) + (let ((dummy (make-ctran)) + (dummy2 (make-ctran))) + (ir1-convert start dummy nil mess-up) + (let* ((mess-node (ctran-use dummy)) + (cleanup (make-cleanup :kind kind + :mess-up mess-node)) + (old-cup (lexenv-cleanup *lexenv*)) + (*lexenv* (make-lexenv :cleanup cleanup))) (setf (entry-cleanup (cleanup-mess-up old-cup)) cleanup) - (ir1-convert dummy dummy2 '(%cleanup-point)) - (ir1-convert-progn-body dummy2 cont body)))) + (ir1-convert dummy dummy2 nil '(%cleanup-point)) + (ir1-convert-progn-body dummy2 next result body)))) ;;; This is a special special form that makes an "escape function" ;;; which returns unknown values from named block. We convert the @@ -817,24 +909,27 @@ ;;; ;;; Note that environment analysis replaces references to escape ;;; functions with references to the corresponding NLX-INFO structure. -(def-ir1-translator %escape-fun ((tag) start cont) - (let ((fun (ir1-convert-lambda - `(lambda () - (return-from ,tag (%unknown-values))) - :debug-name (debug-namify "escape function for ~S" tag)))) +(def-ir1-translator %escape-fun ((tag) start next result) + (let ((fun (let ((*allow-instrumenting* nil)) + (ir1-convert-lambda + `(lambda () + (return-from ,tag (%unknown-values))) + :debug-name (debug-name 'escape-fun tag)))) + (ctran (make-ctran))) (setf (functional-kind fun) :escape) - (reference-leaf start cont fun))) + (ir1-convert start ctran nil `(%%allocate-closures ,fun)) + (reference-leaf ctran next result fun))) ;;; Yet another special special form. This one looks up a local ;;; function and smashes it to a :CLEANUP function, as well as ;;; referencing it. -(def-ir1-translator %cleanup-fun ((name) start cont) +(def-ir1-translator %cleanup-fun ((name) start next result) (let ((fun (lexenv-find name funs))) (aver (lambda-p fun)) (setf (functional-kind fun) :cleanup) - (reference-leaf start cont fun))) + (reference-leaf start next result fun))) -(def-ir1-translator catch ((tag &body body) start cont) +(def-ir1-translator catch ((tag &body body) start next result) #!+sb-doc "Catch Tag Form* Evaluate TAG and instantiate it as a catcher while the body forms are @@ -845,15 +940,15 @@ ;; "escape function" that does a lexical exit, and instantiate the ;; cleanup using %WITHIN-CLEANUP. (ir1-convert - start cont + start next result (with-unique-names (exit-block) `(block ,exit-block - (%within-cleanup - :catch - (%catch (%escape-fun ,exit-block) ,tag) - ,@body))))) + (%within-cleanup + :catch (%catch (%escape-fun ,exit-block) ,tag) + ,@body))))) -(def-ir1-translator unwind-protect ((protected &body cleanup) start cont) +(def-ir1-translator unwind-protect + ((protected &body cleanup) start next result) #!+sb-doc "Unwind-Protect Protected Cleanup* Evaluate the form PROTECTED, returning its values. The CLEANUP forms are @@ -866,107 +961,71 @@ ;; %UNWIND-PROTECT isn't "real", and thus doesn't cause creation of ;; an XEP. (ir1-convert - start cont + start next result (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, - ;; and something can be done to make %ESCAPE-FUN have - ;; dynamic extent too. - (block ,drop-thru-tag - (multiple-value-bind (,next ,start ,count) - (block ,exit-tag - (%within-cleanup - :unwind-protect - (%unwind-protect (%escape-fun ,exit-tag) - (%cleanup-fun ,cleanup-fun)) - (return-from ,drop-thru-tag ,protected))) - (,cleanup-fun) - (%continue-unwind ,next ,start ,count))))))) + ;; FIXME: If we ever get DYNAMIC-EXTENT working, then + ;; ,CLEANUP-FUN should probably be declared DYNAMIC-EXTENT, + ;; and something can be done to make %ESCAPE-FUN have + ;; dynamic extent too. + (block ,drop-thru-tag + (multiple-value-bind (,next ,start ,count) + (block ,exit-tag + (%within-cleanup + :unwind-protect + (%unwind-protect (%escape-fun ,exit-tag) + (%cleanup-fun ,cleanup-fun)) + (return-from ,drop-thru-tag ,protected))) + (,cleanup-fun) + (%continue-unwind ,next ,start ,count))))))) ;;;; multiple-value stuff -(def-ir1-translator multiple-value-call ((fun &rest args) start cont) +(def-ir1-translator multiple-value-call ((fun &rest args) start next result) #!+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." - (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) - (collect ((arg-conts)) - (let ((this-start fun-cont)) - (dolist (arg args) - (let ((this-cont (make-continuation node))) - (ir1-convert this-start this-cont arg) - (setq this-start this-cont) - (arg-conts this-cont))) - (link-node-to-previous-continuation node this-start) - (use-continuation node cont) - (setf (basic-combination-args node) (arg-conts)))))) - -;;; MULTIPLE-VALUE-PROG1 is represented implicitly in IR1 by having a -;;; the result code use result continuation (CONT), but transfer -;;; control to the evaluation of the body. In other words, the result -;;; continuation isn't IMMEDIATELY-USED-P by the nodes that compute -;;; the result. -;;; -;;; In order to get the control flow right, we convert the result with -;;; a dummy result continuation, then convert all the uses of the -;;; dummy to be uses of CONT. If a use is an EXIT, then we also -;;; substitute CONT for the dummy in the corresponding ENTRY node so -;;; that they are consistent. Note that this doesn't amount to -;;; changing the exit target, since the control destination of an exit -;;; is determined by the block successor; we are just indicating the -;;; continuation that the result is delivered to. -;;; -;;; We then convert the body, using another dummy continuation in its -;;; own block as the result. After we are done converting the body, we -;;; move all predecessors of the dummy end block to CONT's block. -;;; -;;; Note that we both exploit and maintain the invariant that the CONT -;;; to an IR1 convert method either has no block or starts the block -;;; that control should transfer to after completion for the form. -;;; Nested MV-PROG1's work because during conversion of the result -;;; form, we use dummy continuation whose block is the true control -;;; destination. -(def-ir1-translator multiple-value-prog1 ((result &rest forms) start cont) + (let* ((ctran (make-ctran)) + (fun-lvar (make-lvar)) + (node (if args + ;; If there are arguments, MULTIPLE-VALUE-CALL + ;; turns into an MV-COMBINATION. + (make-mv-combination fun-lvar) + ;; 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-lvar)))) + (ir1-convert start ctran fun-lvar + (if (and (consp fun) (eq (car fun) 'function)) + fun + `(%coerce-callable-to-fun ,fun))) + (setf (lvar-dest fun-lvar) node) + (collect ((arg-lvars)) + (let ((this-start ctran)) + (dolist (arg args) + (let ((this-ctran (make-ctran)) + (this-lvar (make-lvar node))) + (ir1-convert this-start this-ctran this-lvar arg) + (setq this-start this-ctran) + (arg-lvars this-lvar))) + (link-node-to-previous-ctran node this-start) + (use-continuation node next result) + (setf (basic-combination-args node) (arg-lvars)))))) + +(def-ir1-translator multiple-value-prog1 + ((values-form &rest forms) start next result) #!+sb-doc "MULTIPLE-VALUE-PROG1 Values-Form Form* Evaluate Values-Form and then the Forms, but return all the values of Values-Form." - (continuation-starts-block cont) - (let* ((dummy-result (make-continuation)) - (dummy-start (make-continuation)) - (cont-block (continuation-block cont))) - (continuation-starts-block dummy-start) - (ir1-convert start dummy-start result) - - (substitute-continuation-uses cont dummy-start) - - (continuation-starts-block dummy-result) - (ir1-convert-progn-body dummy-start dummy-result forms) - (let ((end-block (continuation-block dummy-result))) - (dolist (pred (block-pred end-block)) - (unlink-blocks pred end-block) - (link-blocks pred cont-block)) - (aver (not (continuation-dest dummy-result))) - (delete-continuation dummy-result) - (remove-from-dfo end-block)))) + (let ((dummy (make-ctran))) + (ctran-starts-block dummy) + (ir1-convert start dummy result values-form) + (ir1-convert-progn-body dummy next nil forms))) ;;;; interface to defining macros @@ -986,5 +1045,5 @@ ((null path) *current-path*) (let ((first (first path))) (when (or (eq first name) - (eq first 'original-source-start)) - (return path))))) + (eq first 'original-source-start)) + (return path)))))