X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Flocall.lisp;h=d796d01276a43ba194b2905987847f241638258b;hb=34dd23563d2f5cf05c72b971da0d0b065a09bf2a;hp=b8f469757466acf37883a6c42ba3f416053ccb3c;hpb=7fd2eb4b1bc68e8aaec233c4a39bdfc40225bda2;p=sbcl.git diff --git a/src/compiler/locall.lisp b/src/compiler/locall.lisp index b8f4697..d796d01 100644 --- a/src/compiler/locall.lisp +++ b/src/compiler/locall.lisp @@ -67,11 +67,11 @@ (let ((call-set (lambda-tail-set (node-home-lambda call))) (fun-set (lambda-tail-set new-fun))) (unless (eq call-set fun-set) - (let ((funs (tail-set-functions fun-set))) + (let ((funs (tail-set-funs fun-set))) (dolist (fun funs) (setf (lambda-tail-set fun) call-set)) - (setf (tail-set-functions call-set) - (nconc (tail-set-functions call-set) funs))) + (setf (tail-set-funs call-set) + (nconc (tail-set-funs call-set) funs))) (reoptimize-continuation (return-result return)) t))))) @@ -91,7 +91,7 @@ (declare (type ref ref) (type combination call) (type clambda fun)) (propagate-to-args call fun) (setf (basic-combination-kind call) :local) - (pushnew fun (lambda-calls (node-home-lambda call))) + (pushnew fun (lambda-calls-or-closes (node-home-lambda call))) (merge-tail-sets call fun) (change-ref-leaf ref fun) (values)) @@ -124,7 +124,7 @@ ;;; FUN will be verified. Since nothing is known about the type of the ;;; XEP arg vars, type checks will be emitted when the XEP's arg vars ;;; are passed to the actual function. -(defun make-xep-lambda (fun) +(defun make-xep-lambda-expression (fun) (declare (type functional fun)) (etypecase fun (clambda @@ -135,7 +135,7 @@ (declare (type index ,n-supplied)) ,(if (policy *lexenv* (zerop safety)) `(declare (ignore ,n-supplied)) - `(%verify-argument-count ,n-supplied ,nargs)) + `(%verify-arg-count ,n-supplied ,nargs)) (%funcall ,fun ,@temps)))) (optional-dispatch (let* ((min (optional-dispatch-min-args fun)) @@ -164,7 +164,7 @@ (%more-arg-context ,n-supplied ,max) (%funcall ,more ,@temps ,n-context ,n-count)))))) (t - (%argument-count-error ,n-supplied))))))))) + (%arg-count-error ,n-supplied))))))))) ;;; Make an external entry point (XEP) for FUN and return it. We ;;; convert the result of MAKE-XEP-LAMBDA in the correct environment, @@ -175,24 +175,28 @@ ;;; ;;; We set REANALYZE and REOPTIMIZE in the component, just in case we ;;; discover an XEP after the initial local call analyze pass. -(defun make-external-entry-point (fun) +(defun make-xep (fun) (declare (type functional fun)) - (aver (not (functional-entry-function fun))) - (with-ir1-environment (lambda-bind (main-entry fun)) - (let ((res (ir1-convert-lambda (make-xep-lambda fun)))) + (aver (null (functional-entry-fun fun))) + (with-ir1-environment-from-node (lambda-bind (main-entry fun)) + (let ((res (ir1-convert-lambda (make-xep-lambda-expression fun) + :debug-name (debug-namify + "XEP for ~A" + (leaf-debug-name fun))))) (setf (functional-kind res) :external (leaf-ever-used res) t - (functional-entry-function res) fun - (functional-entry-function fun) res + (functional-entry-fun res) fun + (functional-entry-fun fun) res (component-reanalyze *current-component*) t (component-reoptimize *current-component*) t) (etypecase fun - (clambda (local-call-analyze-1 fun)) + (clambda + (locall-analyze-fun-1 fun)) (optional-dispatch (dolist (ep (optional-dispatch-entry-points fun)) - (local-call-analyze-1 ep)) + (locall-analyze-fun-1 ep)) (when (optional-dispatch-more-entry fun) - (local-call-analyze-1 (optional-dispatch-more-entry fun))))) + (locall-analyze-fun-1 (optional-dispatch-more-entry fun))))) res))) ;;; Notice a REF that is not in a local-call context. If the REF is @@ -204,10 +208,10 @@ (defun reference-entry-point (ref) (declare (type ref ref)) (let ((fun (ref-leaf ref))) - (unless (or (external-entry-point-p fun) + (unless (or (xep-p fun) (member (functional-kind fun) '(:escape :cleanup))) - (change-ref-leaf ref (or (functional-entry-function fun) - (make-external-entry-point fun)))))) + (change-ref-leaf ref (or (functional-entry-fun fun) + (make-xep fun)))))) ;;; Attempt to convert all references to FUN to local calls. The ;;; reference must be the function for a call, and the function @@ -220,10 +224,10 @@ ;;; function as an entry-point, creating a new XEP if necessary. We ;;; don't try to convert calls that are in error (:ERROR kind.) ;;; -;;; This is broken off from LOCAL-CALL-ANALYZE so that people can -;;; force analysis of newly introduced calls. Note that we don't do -;;; LET conversion here. -(defun local-call-analyze-1 (fun) +;;; This is broken off from LOCALL-ANALYZE-COMPONENT so that people +;;; can force analysis of newly introduced calls. Note that we don't +;;; do LET conversion here. +(defun locall-analyze-fun-1 (fun) (declare (type functional fun)) (let ((refs (leaf-refs fun)) (first-time t)) @@ -244,7 +248,7 @@ (values)) -;;; We examine all NEW-FUNCTIONS in component, attempting to convert +;;; We examine all NEW-FUNCTIONALS in COMPONENT, attempting to convert ;;; calls into local calls when it is legal. We also attempt to ;;; convert each LAMBDA to a LET. LET conversion is also triggered by ;;; deletion of a function reference, but functions that start out @@ -252,49 +256,66 @@ ;;; ;;; Note that there is a lot of action going on behind the scenes ;;; here, triggered by reference deletion. In particular, the -;;; COMPONENT-LAMBDAS are being hacked to remove newly deleted and let +;;; COMPONENT-LAMBDAS are being hacked to remove newly deleted and LET ;;; converted LAMBDAs, so it is important that the LAMBDA is added to ;;; the COMPONENT-LAMBDAS when it is. Also, the -;;; COMPONENT-NEW-FUNCTIONS may contain all sorts of drivel, since it -;;; is not updated when we delete functions, etc. Only +;;; COMPONENT-NEW-FUNCTIONALS may contain all sorts of drivel, since +;;; it is not updated when we delete functions, etc. Only ;;; COMPONENT-LAMBDAS is updated. ;;; -;;; COMPONENT-REANALYZE-FUNCTIONS is treated similarly to -;;; NEW-FUNCTIONS, but we don't add lambdas to the LAMBDAS. -(defun local-call-analyze (component) +;;; COMPONENT-REANALYZE-FUNCTIONALS is treated similarly to +;;; COMPONENT-NEW-FUNCTIONALS, but we don't add lambdas to the +;;; LAMBDAS. +(defun locall-analyze-component (component) (declare (type component component)) + (aver-live-component component) (loop - (let* ((new (pop (component-new-functions component))) - (fun (or new (pop (component-reanalyze-functions component))))) - (unless fun (return)) - (let ((kind (functional-kind fun))) - (cond ((member kind '(:deleted :let :mv-let :assignment))) - ((and (null (leaf-refs fun)) (eq kind nil) - (not (functional-entry-function fun))) - (delete-functional fun)) + (let* ((new-functional (pop (component-new-functionals component))) + (functional (or new-functional + (pop (component-reanalyze-functionals component))))) + (unless functional + (return)) + (let ((kind (functional-kind functional))) + (cond ((or (functional-somewhat-letlike-p functional) + (eql kind :deleted)) + (values)) ; nothing to do + ((and (null (leaf-refs functional)) (eq kind nil) + (not (functional-entry-fun functional))) + (delete-functional functional)) (t - (when (and new (lambda-p fun)) - (push fun (component-lambdas component))) - (local-call-analyze-1 fun) - (when (lambda-p fun) - (maybe-let-convert fun))))))) - + ;; Fix/check FUNCTIONAL's relationship to COMPONENT-LAMDBAS. + (cond ((not (lambda-p functional)) + ;; Since FUNCTIONAL isn't a LAMBDA, this doesn't + ;; apply: no-op. + (values)) + (new-functional ; FUNCTIONAL came from + ; NEW-FUNCTIONALS, hence is new. + ;; FUNCTIONAL becomes part of COMPONENT-LAMBDAS now. + (aver (not (member functional + (component-lambdas component)))) + (push functional (component-lambdas component))) + (t ; FUNCTIONAL is old. + ;; FUNCTIONAL should be in COMPONENT-LAMBDAS already. + (aver (member functional (component-lambdas + component))))) + (locall-analyze-fun-1 functional) + (when (lambda-p functional) + (maybe-let-convert functional))))))) (values)) -(defun local-call-analyze-until-done (clambdas) +(defun locall-analyze-clambdas-until-done (clambdas) (loop - (/show "at head of LOCAL-CALL-ANALYZE-UNTIL-DONE loop") (let ((did-something nil)) (dolist (clambda clambdas) - (let* ((component (block-component (node-block (lambda-bind clambda)))) + (let* ((component (lambda-component clambda)) (*all-components* (list component))) ;; The original CMU CL code seemed to implicitly assume that ;; COMPONENT is the only one here. Let's make that explicit. (aver (= 1 (length (functional-components clambda)))) (aver (eql component (first (functional-components clambda)))) - (when (component-new-functions component) + (when (component-new-functionals component) (setf did-something t) - (local-call-analyze component)))) + (locall-analyze-component component)))) (unless did-something (return)))) (values)) @@ -303,34 +324,38 @@ ;;; to be in an infinite recursive loop, then change the reference to ;;; reference a fresh copy. We return whichever function we decide to ;;; reference. -(defun maybe-expand-local-inline (fun ref call) +(defun maybe-expand-local-inline (original-functional ref call) (if (and (policy call - (and (>= speed space) (>= speed compilation-speed))) + (and (>= speed space) + (>= speed compilation-speed))) (not (eq (functional-kind (node-home-lambda call)) :external)) (inline-expansion-ok call)) - (with-ir1-environment call - (let* ((*lexenv* (functional-lexenv fun)) - (won nil) - (res (catch 'local-call-lossage - (prog1 - (ir1-convert-lambda (functional-inline-expansion - fun)) - (setq won t))))) - (cond (won - (change-ref-leaf ref res) - res) - (t - (let ((*compiler-error-context* call)) - (compiler-note "couldn't inline expand because expansion ~ - calls this let-converted local function:~ - ~% ~S" - (leaf-name res))) - fun)))) - fun)) + (multiple-value-bind (losing-local-functional converted-lambda) + (catch 'locall-already-let-converted + (with-ir1-environment-from-node call + (let ((*lexenv* (functional-lexenv original-functional))) + (values nil + (ir1-convert-lambda + (functional-inline-expansion original-functional) + :debug-name (debug-namify + "local inline ~A" + (leaf-debug-name + original-functional))))))) + (cond (losing-local-functional + (let ((*compiler-error-context* call)) + (compiler-note "couldn't inline expand because expansion ~ + calls this LET-converted local function:~ + ~% ~S" + (leaf-debug-name losing-local-functional))) + original-functional) + (t + (change-ref-leaf ref converted-lambda) + converted-lambda))) + original-functional)) ;;; Dispatch to the appropriate function to attempt to convert a call. ;;; REF must be a reference to a FUNCTIONAL. This is called in IR1 -;;; optimize as well as in local call analysis. If the call is is +;;; optimization as well as in local call analysis. If the call is is ;;; already :LOCAL, we do nothing. If the call is already scheduled ;;; for deletion, also do nothing (in addition to saving time, this ;;; also avoids some problems with optimizing collections of functions @@ -357,14 +382,14 @@ (block-delete-p block) (eq (functional-kind (block-home-lambda block)) :deleted) (member (functional-kind original-fun) - '(:top-level-xep :deleted)) + '(:toplevel-xep :deleted)) (not (or (eq (component-kind component) :initial) (eq (block-component (node-block (lambda-bind (main-entry original-fun)))) component)))) - (let ((fun (if (external-entry-point-p original-fun) - (functional-entry-function original-fun) + (let ((fun (if (xep-p original-fun) + (functional-entry-fun original-fun) original-fun)) (*compiler-error-context* call)) @@ -401,12 +426,12 @@ (defun convert-mv-call (ref call fun) (declare (type ref ref) (type mv-combination call) (type functional fun)) (when (and (looks-like-an-mv-bind fun) - (not (functional-entry-function fun)) + (not (functional-entry-fun fun)) (= (length (leaf-refs fun)) 1) (= (length (basic-combination-args call)) 1)) (let ((ep (car (last (optional-dispatch-entry-points fun))))) (setf (basic-combination-kind call) :local) - (pushnew ep (lambda-calls (node-home-lambda call))) + (pushnew ep (lambda-calls-or-closes (node-home-lambda call))) (merge-tail-sets call ep) (change-ref-leaf ref ep) @@ -444,12 +469,12 @@ ;; wrong. And we're in locall.lisp here, so it's probably ;; (haven't checked this..) a call to something in the same ;; file. So maybe it deserves a full warning anyway. - (compiler-warning + (compiler-warn "function called with ~R argument~:P, but wants exactly ~R" call-args nargs) (setf (basic-combination-kind call) :error))))) -;;;; optional, more and keyword calls +;;;; &OPTIONAL, &MORE and &KEYWORD calls ;;; This is similar to CONVERT-LAMBDA-CALL, but deals with ;;; OPTIONAL-DISPATCHes. If only fixed args are supplied, then convert @@ -465,7 +490,7 @@ (cond ((< call-args min-args) ;; FIXME: See FIXME note at the previous ;; wrong-number-of-arguments warnings in this file. - (compiler-warning + (compiler-warn "function called with ~R argument~:P, but wants at least ~R" call-args min-args) (setf (basic-combination-kind call) :error)) @@ -478,32 +503,35 @@ (t ;; FIXME: See FIXME note at the previous ;; wrong-number-of-arguments warnings in this file. - (compiler-warning + (compiler-warn "function called with ~R argument~:P, but wants at most ~R" call-args max-args) (setf (basic-combination-kind call) :error)))) (values)) -;;; This function is used to convert a call to an entry point when complex -;;; transformations need to be done on the original arguments. Entry is the -;;; entry point function that we are calling. Vars is a list of variable names -;;; which are bound to the original call arguments. Ignores is the subset of -;;; Vars which are ignored. Args is the list of arguments to the entry point -;;; function. +;;; This function is used to convert a call to an entry point when +;;; complex transformations need to be done on the original arguments. +;;; ENTRY is the entry point function that we are calling. VARS is a +;;; list of variable names which are bound to the original call +;;; arguments. IGNORES is the subset of VARS which are ignored. ARGS +;;; is the list of arguments to the entry point function. ;;; -;;; In order to avoid gruesome graph grovelling, we introduce a new function -;;; that rearranges the arguments and calls the entry point. We analyze the -;;; new function and the entry point immediately so that everything gets -;;; converted during the single pass. +;;; In order to avoid gruesome graph grovelling, we introduce a new +;;; function that rearranges the arguments and calls the entry point. +;;; We analyze the new function and the entry point immediately so +;;; that everything gets converted during the single pass. (defun convert-hairy-fun-entry (ref call entry vars ignores args) (declare (list vars ignores args) (type ref ref) (type combination call) (type clambda entry)) (let ((new-fun - (with-ir1-environment call + (with-ir1-environment-from-node call (ir1-convert-lambda `(lambda ,vars (declare (ignorable . ,ignores)) - (%funcall ,entry . ,args)))))) + (%funcall ,entry . ,args)) + :debug-name (debug-namify "hairy function entry ~S" + (continuation-fun-name + (basic-combination-fun call))))))) (convert-call ref call new-fun) (dolist (ref (leaf-refs entry)) (convert-call-if-possible ref (continuation-dest (node-cont ref)))))) @@ -546,14 +574,14 @@ (key-vars var)) ((:rest :optional)) ((:more-context :more-count) - (compiler-warning "can't local-call functions with &MORE args") + (compiler-warn "can't local-call functions with &MORE args") (setf (basic-combination-kind call) :error) (return-from convert-more-call)))))) (when (optional-dispatch-keyp fun) (when (oddp (length more)) - (compiler-warning "function called with odd number of ~ - arguments in keyword portion") + (compiler-warn "function called with odd number of ~ + arguments in keyword portion") (setf (basic-combination-kind call) :error) (return-from convert-more-call)) @@ -582,8 +610,8 @@ (return))))))) (when (and loser (not (optional-dispatch-allowp fun))) - (compiler-warning "function called with unknown argument keyword ~S" - loser) + (compiler-warn "function called with unknown argument keyword ~S" + loser) (setf (basic-combination-kind call) :error) (return-from convert-more-call))) @@ -628,11 +656,11 @@ ;;;; corresponding combination node, making the control transfer ;;;; explicit and allowing LETs to be mashed together into a single ;;;; block. The value of the LET is delivered directly to the -;;;; original continuation for the call,eliminating the need to +;;;; original continuation for the call, eliminating the need to ;;;; propagate information from the dummy result continuation. ;;;; -- As far as IR1 optimization is concerned, it is interesting in ;;;; that there is only one expression that the variable can be bound -;;;; to, and this is easily substitited for. +;;;; to, and this is easily substituted for. ;;;; -- LETs are interesting to environment analysis and to the back ;;;; end because in most ways a LET can be considered to be "the ;;;; same function" as its home function. @@ -641,53 +669,53 @@ ;;;; control transfer, cleanup code must be emitted to remove ;;;; dynamic bindings that are no longer in effect. -;;; Set up the control transfer to the called lambda. We split the -;;; call block immediately after the call, and link the head of FUN to -;;; the call block. The successor block after splitting (where we -;;; return to) is returned. +;;; Set up the control transfer to the called CLAMBDA. We split the +;;; call block immediately after the call, and link the head of +;;; CLAMBDA to the call block. The successor block after splitting +;;; (where we return to) is returned. ;;; ;;; If the lambda is is a different component than the call, then we ;;; call JOIN-COMPONENTS. This only happens in block compilation ;;; before FIND-INITIAL-DFO. -(defun insert-let-body (fun call) - (declare (type clambda fun) (type basic-combination call)) +(defun insert-let-body (clambda call) + (declare (type clambda clambda) (type basic-combination call)) (let* ((call-block (node-block call)) - (bind-block (node-block (lambda-bind fun))) + (bind-block (node-block (lambda-bind clambda))) (component (block-component call-block))) - (let ((fun-component (block-component bind-block))) - (unless (eq fun-component component) + (aver-live-component component) + (let ((clambda-component (block-component bind-block))) + (unless (eq clambda-component component) (aver (eq (component-kind component) :initial)) - (join-components component fun-component))) - + (join-components component clambda-component))) (let ((*current-component* component)) (node-ends-block call)) - ;; FIXME: Use PROPER-LIST-OF-LENGTH-P here, and look for other + ;; FIXME: Use DESTRUCTURING-BIND here, and grep for other ;; uses of '=.*length' which could also be converted to use - ;; PROPER-LIST-OF-LENGTH-P. + ;; DESTRUCTURING-BIND or PROPER-LIST-OF-LENGTH-P. (aver (= (length (block-succ call-block)) 1)) (let ((next-block (first (block-succ call-block)))) (unlink-blocks call-block next-block) (link-blocks call-block bind-block) next-block))) -;;; Remove FUN from the tail set of anything it used to be in the -;;; same set as; but leave FUN with a valid tail set value of +;;; Remove CLAMBDA from the tail set of anything it used to be in the +;;; same set as; but leave CLAMBDA with a valid tail set value of ;;; its own, for the benefit of code which might try to pull ;;; something out of it (e.g. return type). -(defun depart-from-tail-set (fun) +(defun depart-from-tail-set (clambda) ;; Until sbcl-0.pre7.37.flaky5.2, we did - ;; (LET ((TAILS (LAMBDA-TAIL-SET FUN))) - ;; (SETF (TAIL-SET-FUNCTIONS TAILS) - ;; (DELETE FUN (TAIL-SET-FUNCTIONS TAILS)))) - ;; (SETF (LAMBDA-TAIL-SET FUN) NIL) + ;; (LET ((TAILS (LAMBDA-TAIL-SET CLAMBDA))) + ;; (SETF (TAIL-SET-FUNS TAILS) + ;; (DELETE CLAMBDA (TAIL-SET-FUNS TAILS)))) + ;; (SETF (LAMBDA-TAIL-SET CLAMBDA) NIL) ;; here. Apparently the idea behind the (SETF .. NIL) was that since - ;; TAIL-SET-FUNCTIONS no longer thinks we're in the tail set, it's + ;; TAIL-SET-FUNS no longer thinks we're in the tail set, it's ;; inconsistent, and perhaps unsafe, for us to think we're in the ;; tail set. Unfortunately.. ;; ;; The (SETF .. NIL) caused problems in sbcl-0.pre7.37.flaky5.2 when ;; I was trying to get Python to emit :EXTERNAL LAMBDAs directly - ;; (instead of only being able to emit funny little :TOP-LEVEL stubs + ;; (instead of only being able to emit funny little :TOPLEVEL stubs ;; which you called in order to get the address of an external LAMBDA): ;; the external function was defined in terms of internal function, ;; which was LET-converted, and then things blew up downstream when @@ -695,10 +723,10 @@ ;; the now-NILed-out TAIL-SET. So.. ;; ;; To deal with this problem, we no longer NIL out - ;; (LAMBDA-TAIL-SET FUN) here. Instead: - ;; * If we're the only function in TAIL-SET-FUNCTIONS, it should + ;; (LAMBDA-TAIL-SET CLAMBDA) here. Instead: + ;; * If we're the only function in TAIL-SET-FUNS, it should ;; be safe to leave ourself linked to it, and it to you. - ;; * If there are other functions in TAIL-SET-FUNCTIONS, then we're + ;; * If there are other functions in TAIL-SET-FUNS, then we're ;; afraid of future optimizations on those functions causing ;; the TAIL-SET object no longer to be valid to describe our ;; return value. Thus, we delete ourselves from that object; @@ -706,62 +734,76 @@ ;; one, for ourselves, for the use of later code (e.g. ;; FINALIZE-XEP-DEFINITION) which might want to ;; know about our return type. - (let* ((old-tail-set (lambda-tail-set fun)) - (old-tail-set-functions (tail-set-functions old-tail-set))) - (unless (= 1 (length old-tail-set-functions)) - (setf (tail-set-functions old-tail-set) - (delete fun old-tail-set-functions)) + (let* ((old-tail-set (lambda-tail-set clambda)) + (old-tail-set-funs (tail-set-funs old-tail-set))) + (unless (= 1 (length old-tail-set-funs)) + (setf (tail-set-funs old-tail-set) + (delete clambda old-tail-set-funs)) (let ((new-tail-set (copy-tail-set old-tail-set))) - (setf (lambda-tail-set fun) new-tail-set - (tail-set-functions new-tail-set) (list fun))))) + (setf (lambda-tail-set clambda) new-tail-set + (tail-set-funs new-tail-set) (list clambda))))) ;; The documentation on TAIL-SET-INFO doesn't tell whether it could ;; remain valid in this case, so we nuke it on the theory that ;; missing information tends to be less dangerous than incorrect ;; information. - (setf (tail-set-info (lambda-tail-set fun)) nil)) + (setf (tail-set-info (lambda-tail-set clambda)) nil)) -;;; Handle the environment semantics of LET conversion. We add the -;;; lambda and its LETs to LETs for the CALL's home function. We merge -;;; the calls for FUN with the calls for the home function, removing -;;; FUN in the process. We also merge the ENTRIES. +;;; Handle the environment semantics of LET conversion. We add CLAMBDA +;;; and its LETs to LETs for the CALL's home function. We merge the +;;; calls for CLAMBDA with the calls for the home function, removing +;;; CLAMBDA in the process. We also merge the ENTRIES. ;;; ;;; We also unlink the function head from the component head and set ;;; COMPONENT-REANALYZE to true to indicate that the DFO should be ;;; recomputed. -(defun merge-lets (fun call) +(defun merge-lets (clambda call) - (declare (type clambda fun) (type basic-combination call)) + (declare (type clambda clambda) (type basic-combination call)) - (let ((component (block-component (node-block call)))) - (unlink-blocks (component-head component) (node-block (lambda-bind fun))) + (let ((component (node-component call))) + (unlink-blocks (component-head component) (lambda-block clambda)) (setf (component-lambdas component) - (delete fun (component-lambdas component))) + (delete clambda (component-lambdas component))) (setf (component-reanalyze component) t)) - (setf (lambda-call-lexenv fun) (node-lexenv call)) + (setf (lambda-call-lexenv clambda) (node-lexenv call)) - (depart-from-tail-set fun) + (depart-from-tail-set clambda) (let* ((home (node-home-lambda call)) (home-env (lambda-physenv home))) - (push fun (lambda-lets home)) - (setf (lambda-home fun) home) - (setf (lambda-physenv fun) home-env) - (let ((lets (lambda-lets fun))) + ;; CLAMBDA belongs to HOME now. + (push clambda (lambda-lets home)) + (setf (lambda-home clambda) home) + (setf (lambda-physenv clambda) home-env) + + ;; All of CLAMBDA's LETs belong to HOME now. + (let ((lets (lambda-lets clambda))) (dolist (let lets) (setf (lambda-home let) home) (setf (lambda-physenv let) home-env)) + (setf (lambda-lets home) (nconc lets (lambda-lets home)))) + ;; CLAMBDA no longer has an independent existence as an entity + ;; which has LETs. + (setf (lambda-lets clambda) nil) - (setf (lambda-lets home) (nconc lets (lambda-lets home))) - (setf (lambda-lets fun) ())) - - (setf (lambda-calls home) - (delete fun (nunion (lambda-calls fun) (lambda-calls home)))) - (setf (lambda-calls fun) ()) + ;; HOME no longer calls CLAMBDA, and owns all of CLAMBDA's old + ;; DFO dependencies. + (setf (lambda-calls-or-closes home) + (delete clambda + (nunion (lambda-calls-or-closes clambda) + (lambda-calls-or-closes home)))) + ;; CLAMBDA no longer has an independent existence as an entity + ;; which calls things or has DFO dependencies. + (setf (lambda-calls-or-closes clambda) nil) + ;; All of CLAMBDA's ENTRIES belong to HOME now. (setf (lambda-entries home) - (nconc (lambda-entries fun) (lambda-entries home))) - (setf (lambda-entries fun) ())) + (nconc (lambda-entries clambda) + (lambda-entries home))) + ;; CLAMBDA no longer has an independent existence as an entity + ;; with ENTRIES. + (setf (lambda-entries clambda) nil)) (values)) @@ -817,29 +859,31 @@ ;;; NEXT-BLOCK (FUN's return point.) We can't do this by DO-USES on ;;; the RETURN-RESULT, because the return might have been deleted (if ;;; all calls were TR.) -;;; -;;; The called function might be an assignment in the case where we -;;; are currently converting that function. In steady-state, -;;; assignments never appear in the lambda-calls. (defun unconvert-tail-calls (fun call next-block) - (dolist (called (lambda-calls fun)) - (dolist (ref (leaf-refs called)) - (let ((this-call (continuation-dest (node-cont ref)))) - (when (and (node-tail-p this-call) - (eq (node-home-lambda this-call) fun)) - (setf (node-tail-p this-call) nil) - (ecase (functional-kind called) - ((nil :cleanup :optional) - (let ((block (node-block this-call)) - (cont (node-cont call))) - (ensure-block-start cont) - (unlink-blocks block (first (block-succ block))) - (link-blocks block next-block) - (delete-continuation-use this-call) - (add-continuation-use this-call cont))) - (:deleted) - (:assignment - (aver (eq called fun)))))))) + (dolist (called (lambda-calls-or-closes fun)) + (when (lambda-p called) + (dolist (ref (leaf-refs called)) + (let ((this-call (continuation-dest (node-cont ref)))) + (when (and this-call + (node-tail-p this-call) + (eq (node-home-lambda this-call) fun)) + (setf (node-tail-p this-call) nil) + (ecase (functional-kind called) + ((nil :cleanup :optional) + (let ((block (node-block this-call)) + (cont (node-cont call))) + (ensure-block-start cont) + (unlink-blocks block (first (block-succ block))) + (link-blocks block next-block) + (delete-continuation-use this-call) + (add-continuation-use this-call cont))) + (:deleted) + ;; The called function might be an assignment in the + ;; case where we are currently converting that function. + ;; In steady-state, assignments never appear as a called + ;; function. + (:assignment + (aver (eq called fun))))))))) (values)) ;;; Deal with returning from a LET or assignment that we are @@ -886,11 +930,11 @@ (values)) ;;; Actually do LET conversion. We call subfunctions to do most of the -;;; work. We change the CALL's cont to be the continuation heading the -;;; bind block, and also do REOPTIMIZE-CONTINUATION on the args and -;;; Cont so that LET-specific IR1 optimizations get a chance. We blow -;;; away any entry for the function in *FREE-FUNCTIONS* so that nobody -;;; will create new reference to it. +;;; work. We change the CALL's CONT to be the continuation heading the +;;; BIND block, and also do REOPTIMIZE-CONTINUATION on the args and +;;; CONT so that LET-specific IR1 optimizations get a chance. We blow +;;; away any entry for the function in *FREE-FUNS* so that nobody +;;; will create new references to it. (defun let-convert (fun call) (declare (type clambda fun) (type basic-combination call)) (let ((next-block (if (node-tail-p call) @@ -899,7 +943,7 @@ (move-return-stuff fun call next-block) (merge-lets fun call))) -;;; Reoptimize all of Call's args and its result. +;;; Reoptimize all of CALL's args and its result. (defun reoptimize-call (call) (declare (type basic-combination call)) (dolist (arg (basic-combination-args call)) @@ -910,18 +954,16 @@ ;;; We also don't convert calls to named functions which appear in the ;;; initial component, delaying this until optimization. This -;;; minimizes the likelyhood that we well let-convert a function which -;;; may have references added due to later local inline expansion +;;; minimizes the likelihood that we will LET-convert a function which +;;; may have references added due to later local inline expansion. (defun ok-initial-convert-p (fun) - (not (and (leaf-name fun) - (eq (component-kind - (block-component - (node-block (lambda-bind fun)))) + (not (and (leaf-has-source-name-p fun) + (eq (component-kind (lambda-component fun)) :initial)))) ;;; This function is called when there is some reason to believe that -;;; the lambda Fun might be converted into a let. This is done after -;;; local call analysis, and also when a reference is deleted. We only +;;; CLAMBDA might be converted into a LET. This is done after local +;;; call analysis, and also when a reference is deleted. We only ;;; convert to a let when the function is a normal local function, has ;;; no XEP, and is referenced in exactly one local call. Conversion is ;;; also inhibited if the only reference is in a block about to be @@ -938,13 +980,13 @@ ;;; We don't attempt to convert calls to functions that have an XEP, ;;; since we might be embarrassed later when we want to convert a ;;; newly discovered local call. Also, see OK-INITIAL-CONVERT-P. -(defun maybe-let-convert (fun) - (declare (type clambda fun)) - (let ((refs (leaf-refs fun))) +(defun maybe-let-convert (clambda) + (declare (type clambda clambda)) + (let ((refs (leaf-refs clambda))) (when (and refs (null (rest refs)) - (member (functional-kind fun) '(nil :assignment)) - (not (functional-entry-function fun))) + (member (functional-kind clambda) '(nil :assignment)) + (not (functional-entry-fun clambda))) (let* ((ref-cont (node-cont (first refs))) (dest (continuation-dest ref-cont))) (when (and dest @@ -952,14 +994,14 @@ (eq (basic-combination-fun dest) ref-cont) (eq (basic-combination-kind dest) :local) (not (block-delete-p (node-block dest))) - (cond ((ok-initial-convert-p fun) t) + (cond ((ok-initial-convert-p clambda) t) (t (reoptimize-continuation ref-cont) nil))) - (unless (eq (functional-kind fun) :assignment) - (let-convert fun dest)) + (unless (eq (functional-kind clambda) :assignment) + (let-convert clambda dest)) (reoptimize-call dest) - (setf (functional-kind fun) + (setf (functional-kind clambda) (if (mv-combination-p dest) :mv-let :let)))) t))) @@ -1008,13 +1050,14 @@ (fun (combination-lambda call))) (setf (node-tail-p call) t) (unlink-blocks block (first (block-succ block))) - (link-blocks block (node-block (lambda-bind fun))) + (link-blocks block (lambda-block fun)) (values t (maybe-convert-to-assignment fun)))))) -;;; This is called when we believe it might make sense to convert Fun -;;; to an assignment. All this function really does is determine when -;;; a function with more than one call can still be combined with the -;;; calling function's environment. We can convert when: +;;; This is called when we believe it might make sense to convert +;;; CLAMBDA to an assignment. All this function really does is +;;; determine when a function with more than one call can still be +;;; combined with the calling function's environment. We can convert +;;; when: ;;; -- The function is a normal, non-entry function, and ;;; -- Except for one call, all calls must be tail recursive calls ;;; in the called function (i.e. are self-recursive tail calls) @@ -1031,28 +1074,32 @@ ;;; calls as long as they all return to the same place (i.e. have the ;;; same conceptual continuation.) A special case of this would be ;;; when all of the outside calls are tail recursive. -(defun maybe-convert-to-assignment (fun) - (declare (type clambda fun)) - (when (and (not (functional-kind fun)) - (not (functional-entry-function fun))) +(defun maybe-convert-to-assignment (clambda) + (declare (type clambda clambda)) + (when (and (not (functional-kind clambda)) + (not (functional-entry-fun clambda))) (let ((non-tail nil) (call-fun nil)) - (when (and (dolist (ref (leaf-refs fun) t) + (when (and (dolist (ref (leaf-refs clambda) t) (let ((dest (continuation-dest (node-cont ref)))) (when (or (not dest) (block-delete-p (node-block dest))) (return nil)) (let ((home (node-home-lambda ref))) - (unless (eq home fun) - (when call-fun (return nil)) + (unless (eq home clambda) + (when call-fun + (return nil)) (setq call-fun home)) (unless (node-tail-p dest) - (when (or non-tail (eq home fun)) (return nil)) + (when (or non-tail (eq home clambda)) + (return nil)) (setq non-tail dest))))) - (ok-initial-convert-p fun)) - (setf (functional-kind fun) :assignment) - (let-convert fun (or non-tail - (continuation-dest - (node-cont (first (leaf-refs fun)))))) - (when non-tail (reoptimize-call non-tail)) + (ok-initial-convert-p clambda)) + (setf (functional-kind clambda) :assignment) + (let-convert clambda + (or non-tail + (continuation-dest + (node-cont (first (leaf-refs clambda)))))) + (when non-tail + (reoptimize-call non-tail)) t))))