1 ;;;; This file contains the virtual-machine-independent parts of the
2 ;;;; code which does the actual translation of nodes to VOPs.
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 ;;;; moves and type checks
17 ;;; Move X to Y unless they are EQ.
18 (defun emit-move (node block x y)
19 (declare (type node node) (type ir2-block block) (type tn x y))
21 (vop move node block x y))
24 ;;; Determine whether we should emit a single-stepper breakpoint
25 ;;; around a call / before a vop.
26 (defun emit-step-p (node)
27 (if (and (policy node (> insert-step-conditions 1))
28 (typep node 'combination))
29 (combination-step-info node)
32 ;;; If there is any CHECK-xxx template for TYPE, then return it,
33 ;;; otherwise return NIL.
34 (defun type-check-template (type)
35 (declare (type ctype type))
36 (multiple-value-bind (check-ptype exact) (primitive-type type)
38 (primitive-type-check check-ptype)
39 (let ((name (hairy-type-check-template-name type)))
41 (template-or-lose name)
44 ;;; Emit code in BLOCK to check that VALUE is of the specified TYPE,
45 ;;; yielding the checked result in RESULT. VALUE and result may be of
46 ;;; any primitive type. There must be CHECK-xxx VOP for TYPE. Any
47 ;;; other type checks should have been converted to an explicit type
49 (defun emit-type-check (node block value result type)
50 (declare (type tn value result) (type node node) (type ir2-block block)
52 (emit-move-template node block (type-check-template type) value result)
55 ;;; Allocate an indirect value cell.
56 (defevent make-value-cell-event "Allocate heap value cell for lexical var.")
57 (defun emit-make-value-cell (node block value res)
58 (event make-value-cell-event node)
59 (vop make-value-cell node block value nil res))
63 ;;; Return the TN that holds the value of THING in the environment ENV.
64 (declaim (ftype (function ((or nlx-info lambda-var clambda) physenv) tn)
66 (defun find-in-physenv (thing physenv)
67 (or (cdr (assoc thing (ir2-physenv-closure (physenv-info physenv))))
70 ;; I think that a failure of this assertion means that we're
71 ;; trying to access a variable which was improperly closed
72 ;; over. The PHYSENV describes a physical environment. Every
73 ;; variable that a form refers to should either be in its
74 ;; physical environment directly, or grabbed from a
75 ;; surrounding physical environment when it was closed over.
76 ;; The ASSOC expression above finds closed-over variables, so
77 ;; if we fell through the ASSOC expression, it wasn't closed
78 ;; over. Therefore, it must be in our physical environment
79 ;; directly. If instead it is in some other physical
80 ;; environment, then it's bogus for us to reference it here
81 ;; without it being closed over. -- WHN 2001-09-29
82 (aver (eq physenv (lambda-physenv (lambda-var-home thing))))
85 (aver (eq physenv (block-physenv (nlx-info-target thing))))
86 (ir2-nlx-info-home (nlx-info-info thing)))
89 (entry-info-closure-tn (lambda-info thing))))
90 (bug "~@<~2I~_~S ~_not found in ~_~S~:>" thing physenv)))
92 ;;; If LEAF already has a constant TN, return that, otherwise make a
94 (defun constant-tn (leaf boxedp)
95 (declare (type constant leaf))
96 ;; When convenient we can have both a boxed and unboxed TN for
99 (or (constant-boxed-tn leaf)
100 (setf (constant-boxed-tn leaf) (make-constant-tn leaf t)))
102 (setf (leaf-info leaf) (make-constant-tn leaf nil)))))
104 ;;; Return a TN that represents the value of LEAF, or NIL if LEAF
105 ;;; isn't directly represented by a TN. ENV is the environment that
106 ;;; the reference is done in.
107 (defun leaf-tn (leaf env boxedp)
108 (declare (type leaf leaf) (type physenv env))
111 (unless (lambda-var-indirect leaf)
112 (find-in-physenv leaf env)))
113 (constant (constant-tn leaf boxedp))
116 ;;; This is used to conveniently get a handle on a constant TN during
117 ;;; IR2 conversion. It returns a constant TN representing the Lisp
119 (defun emit-constant (value)
120 (constant-tn (find-constant value) t))
122 (defun boxed-ref-p (ref)
123 (let ((dest (lvar-dest (ref-lvar ref))))
124 (cond ((and (basic-combination-p dest) (eq :full (basic-combination-kind dest)))
130 ;;; Convert a REF node. The reference must not be delayed.
131 (defun ir2-convert-ref (node block)
132 (declare (type ref node) (type ir2-block block))
133 (let* ((lvar (node-lvar node))
134 (leaf (ref-leaf node))
135 (locs (lvar-result-tns
136 lvar (list (primitive-type (leaf-type leaf)))))
140 (let ((tn (find-in-physenv leaf (node-physenv node)))
141 (indirect (lambda-var-indirect leaf))
142 (explicit (lambda-var-explicit-value-cell leaf)))
144 ((and indirect explicit)
145 (vop value-cell-ref node block tn res))
147 (not (eq (node-physenv node)
148 (lambda-physenv (lambda-var-home leaf)))))
149 (let ((reffer (third (primitive-type-indirect-cell-type
150 (primitive-type (leaf-type leaf))))))
152 (funcall reffer node block tn (leaf-info leaf) res)
153 (vop ancestor-frame-ref node block tn (leaf-info leaf) res))))
154 (t (emit-move node block tn res)))))
156 (emit-move node block (constant-tn leaf (boxed-ref-p node)) res))
158 (ir2-convert-closure node block leaf res))
160 (ir2-convert-global-var node block leaf res)))
161 (move-lvar-result node block locs lvar))
164 (defun ir2-convert-global-var (node block leaf res)
165 (let ((unsafe (policy node (zerop safety)))
166 (name (leaf-source-name leaf)))
167 (ecase (global-var-kind leaf)
169 (aver (symbolp name))
170 (let ((name-tn (emit-constant name)))
171 (if (or unsafe (info :variable :always-bound name))
172 (vop fast-symbol-value node block name-tn res)
173 (vop symbol-value node block name-tn res))))
175 (aver (symbolp name))
176 (let ((name-tn (emit-constant name)))
177 (if (or unsafe (info :variable :always-bound name))
178 (vop fast-symbol-global-value node block name-tn res)
179 (vop symbol-global-value node block name-tn res))))
182 ((and (info :function :definition name)
183 (info :function :info name))
184 ;; Known functions can be saved without going through fdefns,
185 ;; except during cross-compilation
186 (emit-move node block (make-load-time-constant-tn :known-fun name)
189 (let ((fdefn-tn (make-load-time-constant-tn :fdefinition name)))
191 (vop fdefn-fun node block fdefn-tn res)
192 (vop safe-fdefn-fun node block fdefn-tn res)))))))))
194 ;;; some sanity checks for a CLAMBDA passed to IR2-CONVERT-CLOSURE
195 (defun assertions-on-ir2-converted-clambda (clambda)
196 ;; This assertion was sort of an experiment. It would be nice and
197 ;; sane and easier to understand things if it were *always* true,
198 ;; but experimentally I observe that it's only *almost* always
199 ;; true. -- WHN 2001-01-02
201 (aver (eql (lambda-component clambda)
202 (block-component (ir2-block-block ir2-block))))
203 ;; Check for some weirdness which came up in bug
206 ;; The MAKE-LOAD-TIME-CONSTANT-TN call above puts an :ENTRY record
207 ;; into the IR2-COMPONENT-CONSTANTS table. The dump-a-COMPONENT
209 ;; * treats every HANDLEless :ENTRY record into a
211 ;; * expects every patch to correspond to an
212 ;; IR2-COMPONENT-ENTRIES record.
213 ;; The IR2-COMPONENT-ENTRIES records are set by ENTRY-ANALYZE
214 ;; walking over COMPONENT-LAMBDAS. Bug 138b arose because there
215 ;; was a HANDLEless :ENTRY record which didn't correspond to an
216 ;; IR2-COMPONENT-ENTRIES record. That problem is hard to debug
217 ;; when it's caught at dump time, so this assertion tries to catch
219 (aver (member clambda
220 (component-lambdas (lambda-component clambda))))
221 ;; another bug-138-related issue: COMPONENT-NEW-FUNCTIONALS is
222 ;; used as a queue for stuff pending to do in IR1, and now that
223 ;; we're doing IR2 it should've been completely flushed (but
225 (aver (null (component-new-functionals (lambda-component clambda))))
228 ;;; Emit code to load a function object implementing FUNCTIONAL into
229 ;;; RES. This gets interesting when the referenced function is a
230 ;;; closure: we must make the closure and move the closed-over values
233 ;;; FUNCTIONAL is either a :TOPLEVEL-XEP functional or the XEP lambda
234 ;;; for the called function, since local call analysis converts all
235 ;;; closure references. If a :TOPLEVEL-XEP, we know it is not a
238 ;;; If a closed-over LAMBDA-VAR has no refs (is deleted), then we
239 ;;; don't initialize that slot. This can happen with closures over
240 ;;; top level variables, where optimization of the closure deleted the
241 ;;; variable. Since we committed to the closure format when we
242 ;;; pre-analyzed the top level code, we just leave an empty slot.
243 (defun ir2-convert-closure (ref ir2-block functional res)
244 (declare (type ref ref)
245 (type ir2-block ir2-block)
246 (type functional functional)
249 (aver (not (eql (functional-kind functional) :deleted)))
250 (unless (leaf-info functional)
251 (setf (leaf-info functional)
252 (make-entry-info :name
253 (functional-debug-name functional))))))
254 (let ((closure (etypecase functional
256 (assertions-on-ir2-converted-clambda functional)
257 (physenv-closure (get-lambda-physenv functional)))
259 (aver (eq (functional-kind functional) :toplevel-xep))
264 (let* ((physenv (node-physenv ref))
265 (tn (find-in-physenv functional physenv)))
266 (emit-move ref ir2-block tn res)))
267 ;; we're about to emit a reference to a "closure" that's actually
268 ;; an inlinable global function.
269 ((and (global-var-p (setf global-var
270 (functional-inline-expanded functional)))
271 (eq :global-function (global-var-kind global-var)))
272 (ir2-convert-global-var ref ir2-block global-var res))
274 ;; if we're here, we should have either a toplevel-xep (some
275 ;; global scope function in a different component) or an external
276 ;; reference to the "closure"'s body.
278 (aver (memq (functional-kind functional) '(:external :toplevel-xep)))
279 (let ((entry (make-load-time-constant-tn :entry functional)))
280 (emit-move ref ir2-block entry res))))))
283 (defun closure-initial-value (what this-env current-fp)
284 (declare (type (or nlx-info lambda-var clambda) what)
285 (type physenv this-env)
286 (type (or tn null) current-fp))
287 ;; If we have an indirect LAMBDA-VAR that does not require an
288 ;; EXPLICIT-VALUE-CELL, and is from this environment (not from being
289 ;; closed over), we need to store the current frame pointer.
290 (if (and (lambda-var-p what)
291 (lambda-var-indirect what)
292 (not (lambda-var-explicit-value-cell what))
293 (eq (lambda-physenv (lambda-var-home what))
296 (find-in-physenv what this-env)))
298 (defoptimizer (%allocate-closures ltn-annotate) ((leaves) node ltn-policy)
299 ltn-policy ; a hack to effectively (DECLARE (IGNORE LTN-POLICY))
300 (when (lvar-dynamic-extent leaves)
301 (let ((info (make-ir2-lvar *backend-t-primitive-type*)))
302 (setf (ir2-lvar-kind info) :delayed)
303 (setf (lvar-info leaves) info)
304 (setf (ir2-lvar-stack-pointer info)
305 (make-stack-pointer-tn)))))
307 (defoptimizer (%allocate-closures ir2-convert) ((leaves) call 2block)
308 (let ((dx-p (lvar-dynamic-extent leaves)))
311 (vop current-stack-pointer call 2block
312 (ir2-lvar-stack-pointer (lvar-info leaves))))
313 (dolist (leaf (lvar-value leaves))
314 (binding* ((xep (awhen (functional-entry-fun leaf)
315 ;; if the xep's been deleted then we can skip it
316 (if (eq (functional-kind it) :deleted)
319 (nil (aver (xep-p xep)))
320 (entry-info (lambda-info xep) :exit-if-null)
321 (tn (entry-info-closure-tn entry-info) :exit-if-null)
322 (closure (physenv-closure (get-lambda-physenv xep)))
323 (entry (make-load-time-constant-tn :entry xep)))
324 (let ((this-env (node-physenv call))
325 (leaf-dx-p (and dx-p (leaf-dynamic-extent leaf))))
326 (vop make-closure call 2block entry (length closure)
328 (loop for what in closure and n from 0 do
329 (unless (and (lambda-var-p what)
330 (null (leaf-refs what)))
331 ;; In LABELS a closure may refer to another closure
332 ;; in the same group, so we must be sure that we
333 ;; store a closure only after its creation.
335 ;; TODO: Here is a simple solution: we postpone
336 ;; putting of all closures after all creations
337 ;; (though it may require more registers).
339 (delayed (list tn (find-in-physenv what this-env) n))
340 (let ((initial-value (closure-initial-value
343 (vop closure-init call 2block
345 ;; An initial-value of NIL means to stash
346 ;; the frame pointer... which requires a
348 (vop closure-init-from-fp call 2block tn n)))))))))
349 (loop for (tn what n) in (delayed)
350 do (vop closure-init call 2block
354 ;;; Convert a SET node. If the NODE's LVAR is annotated, then we also
355 ;;; deliver the value to that lvar. If the var is a lexical variable
356 ;;; with no refs, then we don't actually set anything, since the
357 ;;; variable has been deleted.
358 (defun ir2-convert-set (node block)
359 (declare (type cset node) (type ir2-block block))
360 (let* ((lvar (node-lvar node))
361 (leaf (set-var node))
362 (val (lvar-tn node block (set-value node)))
365 lvar (list (primitive-type (leaf-type leaf))))
369 (when (leaf-refs leaf)
370 (let ((tn (find-in-physenv leaf (node-physenv node)))
371 (indirect (lambda-var-indirect leaf))
372 (explicit (lambda-var-explicit-value-cell leaf)))
374 ((and indirect explicit)
375 (vop value-cell-set node block tn val))
377 (not (eq (node-physenv node)
378 (lambda-physenv (lambda-var-home leaf)))))
379 (let ((setter (fourth (primitive-type-indirect-cell-type
380 (primitive-type (leaf-type leaf))))))
382 (funcall setter node block tn val (leaf-info leaf))
383 (vop ancestor-frame-set node block tn val (leaf-info leaf)))))
384 (t (emit-move node block val tn))))))
386 (aver (symbolp (leaf-source-name leaf)))
387 (ecase (global-var-kind leaf)
389 (vop set node block (emit-constant (leaf-source-name leaf)) val))
391 (vop %set-symbol-global-value node
392 block (emit-constant (leaf-source-name leaf)) val)))))
394 (emit-move node block val (first locs))
395 (move-lvar-result node block locs lvar)))
398 ;;;; utilities for receiving fixed values
400 ;;; Return a TN that can be referenced to get the value of LVAR. LVAR
401 ;;; must be LTN-ANNOTATED either as a delayed leaf ref or as a fixed,
402 ;;; single-value lvar.
404 ;;; The primitive-type of the result will always be the same as the
405 ;;; IR2-LVAR-PRIMITIVE-TYPE, ensuring that VOPs are always called with
406 ;;; TNs that satisfy the operand primitive-type restriction. We may
407 ;;; have to make a temporary of the desired type and move the actual
408 ;;; lvar TN into it. This happens when we delete a type check in
409 ;;; unsafe code or when we locally know something about the type of an
410 ;;; argument variable.
411 (defun lvar-tn (node block lvar)
412 (declare (type node node) (type ir2-block block) (type lvar lvar))
413 (let* ((2lvar (lvar-info lvar))
415 (ecase (ir2-lvar-kind 2lvar)
417 (let ((ref (lvar-uses lvar)))
418 (leaf-tn (ref-leaf ref) (node-physenv ref) (boxed-ref-p ref))))
420 (aver (= (length (ir2-lvar-locs 2lvar)) 1))
421 (first (ir2-lvar-locs 2lvar)))))
422 (ptype (ir2-lvar-primitive-type 2lvar)))
424 (cond ((eq (tn-primitive-type lvar-tn) ptype) lvar-tn)
426 (let ((temp (make-normal-tn ptype)))
427 (emit-move node block lvar-tn temp)
430 ;;; This is similar to LVAR-TN, but hacks multiple values. We return
431 ;;; TNs holding the values of LVAR with PTYPES as their primitive
432 ;;; types. LVAR must be annotated for the same number of fixed values
433 ;;; are there are PTYPES.
435 ;;; If the lvar has a type check, check the values into temps and
436 ;;; return the temps. When we have more values than assertions, we
437 ;;; move the extra values with no check.
438 (defun lvar-tns (node block lvar ptypes)
439 (declare (type node node) (type ir2-block block)
440 (type lvar lvar) (list ptypes))
441 (let* ((locs (ir2-lvar-locs (lvar-info lvar)))
442 (nlocs (length locs)))
443 (aver (= nlocs (length ptypes)))
445 (mapcar (lambda (from to-type)
446 (if (eq (tn-primitive-type from) to-type)
448 (let ((temp (make-normal-tn to-type)))
449 (emit-move node block from temp)
454 ;;;; utilities for delivering values to lvars
456 ;;; Return a list of TNs with the specifier TYPES that can be used as
457 ;;; result TNs to evaluate an expression into LVAR. This is used
458 ;;; together with MOVE-LVAR-RESULT to deliver fixed values to
461 ;;; If the lvar isn't annotated (meaning the values are discarded) or
462 ;;; is unknown-values, then we make temporaries for each supplied
463 ;;; value, providing a place to compute the result in until we decide
464 ;;; what to do with it (if anything.)
466 ;;; If the lvar is fixed-values, and wants the same number of values
467 ;;; as the user wants to deliver, then we just return the
468 ;;; IR2-LVAR-LOCS. Otherwise we make a new list padded as necessary by
469 ;;; discarded TNs. We always return a TN of the specified type, using
470 ;;; the lvar locs only when they are of the correct type.
471 (defun lvar-result-tns (lvar types)
472 (declare (type (or lvar null) lvar) (type list types))
474 (mapcar #'make-normal-tn types)
475 (let ((2lvar (lvar-info lvar)))
476 (ecase (ir2-lvar-kind 2lvar)
478 (let* ((locs (ir2-lvar-locs 2lvar))
479 (nlocs (length locs))
480 (ntypes (length types)))
481 (if (and (= nlocs ntypes)
482 (do ((loc locs (cdr loc))
483 (type types (cdr type)))
485 (unless (eq (tn-primitive-type (car loc)) (car type))
488 (mapcar (lambda (loc type)
489 (if (eq (tn-primitive-type loc) type)
491 (make-normal-tn type)))
494 (mapcar #'make-normal-tn
495 (subseq types nlocs)))
499 (mapcar #'make-normal-tn types))))))
501 ;;; Make the first N standard value TNs, returning them in a list.
502 (defun make-standard-value-tns (n)
503 (declare (type unsigned-byte n))
506 (res (standard-arg-location i)))
509 ;;; Return a list of TNs wired to the standard value passing
510 ;;; conventions that can be used to receive values according to the
511 ;;; unknown-values convention. This is used together with
512 ;;; MOVE-LVAR-RESULT for delivering unknown values to a fixed values
515 ;;; If the lvar isn't annotated, then we treat as 0-values, returning
516 ;;; an empty list of temporaries.
518 ;;; If the lvar is annotated, then it must be :FIXED.
519 (defun standard-result-tns (lvar)
520 (declare (type (or lvar null) lvar))
522 (let ((2lvar (lvar-info lvar)))
523 (ecase (ir2-lvar-kind 2lvar)
525 (make-standard-value-tns (length (ir2-lvar-locs 2lvar))))))
528 ;;; Just move each SRC TN into the corresponding DEST TN, defaulting
529 ;;; any unsupplied source values to NIL. We let EMIT-MOVE worry about
530 ;;; doing the appropriate coercions.
531 (defun move-results-coerced (node block src dest)
532 (declare (type node node) (type ir2-block block) (list src dest))
533 (let ((nsrc (length src))
534 (ndest (length dest)))
535 (mapc (lambda (from to)
537 (emit-move node block from to)))
539 (append src (make-list (- ndest nsrc)
540 :initial-element (emit-constant nil)))
545 ;;; Move each SRC TN into the corresponding DEST TN, checking types
546 ;;; and defaulting any unsupplied source values to NIL
547 (defun move-results-checked (node block src dest types)
548 (declare (type node node) (type ir2-block block) (list src dest types))
549 (let ((nsrc (length src))
550 (ndest (length dest))
551 (ntypes (length types)))
552 (mapc (lambda (from to type)
554 (emit-type-check node block from to type)
555 (emit-move node block from to)))
557 (append src (make-list (- ndest nsrc)
558 :initial-element (emit-constant nil)))
562 (append types (make-list (- ndest ntypes)))
566 ;;; If necessary, emit coercion code needed to deliver the RESULTS to
567 ;;; the specified lvar. NODE and BLOCK provide context for emitting
568 ;;; code. Although usually obtained from STANDARD-RESULT-TNs or
569 ;;; LVAR-RESULT-TNs, RESULTS may be a list of any type or
572 ;;; If the lvar is fixed values, then move the results into the lvar
573 ;;; locations. If the lvar is unknown values, then do the moves into
574 ;;; the standard value locations, and use PUSH-VALUES to put the
575 ;;; values on the stack.
576 (defun move-lvar-result (node block results lvar)
577 (declare (type node node) (type ir2-block block)
578 (list results) (type (or lvar null) lvar))
580 (let ((2lvar (lvar-info lvar)))
581 (ecase (ir2-lvar-kind 2lvar)
583 (let ((locs (ir2-lvar-locs 2lvar)))
584 (unless (eq locs results)
585 (move-results-coerced node block results locs))))
587 (let* ((nvals (length results))
588 (locs (make-standard-value-tns nvals)))
589 (move-results-coerced node block results locs)
590 (vop* push-values node block
591 ((reference-tn-list locs nil))
592 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
597 (defun ir2-convert-cast (node block)
598 (declare (type cast node)
599 (type ir2-block block))
600 (binding* ((lvar (node-lvar node) :exit-if-null)
601 (2lvar (lvar-info lvar))
602 (value (cast-value node))
603 (2value (lvar-info value)))
604 (cond ((eq (ir2-lvar-kind 2lvar) :unused))
605 ((eq (ir2-lvar-kind 2lvar) :unknown)
606 (aver (eq (ir2-lvar-kind 2value) :unknown))
607 (aver (not (cast-type-check node)))
608 (move-results-coerced node block
609 (ir2-lvar-locs 2value)
610 (ir2-lvar-locs 2lvar)))
611 ((eq (ir2-lvar-kind 2lvar) :fixed)
612 (aver (eq (ir2-lvar-kind 2value) :fixed))
613 (if (cast-type-check node)
614 (move-results-checked node block
615 (ir2-lvar-locs 2value)
616 (ir2-lvar-locs 2lvar)
617 (multiple-value-bind (check types)
618 (cast-check-types node nil)
619 (aver (eq check :simple))
621 (move-results-coerced node block
622 (ir2-lvar-locs 2value)
623 (ir2-lvar-locs 2lvar))))
624 (t (bug "CAST cannot be :DELAYED.")))))
626 ;;;; template conversion
628 ;;; Build a TN-REFS list that represents access to the values of the
629 ;;; specified list of lvars ARGS for TEMPLATE. Any :CONSTANT arguments
630 ;;; are returned in the second value as a list rather than being
631 ;;; accessed as a normal argument. NODE and BLOCK provide the context
632 ;;; for emitting any necessary type-checking code.
633 (defun reference-args (node block args template)
634 (declare (type node node) (type ir2-block block) (list args)
635 (type template template))
636 (collect ((info-args))
639 (do ((args args (cdr args))
640 (types (template-arg-types template) (cdr types)))
642 (let ((type (first types))
644 (if (and (consp type) (eq (car type) ':constant))
645 (info-args (lvar-value arg))
646 (let ((ref (reference-tn (lvar-tn node block arg) nil)))
648 (setf (tn-ref-across last) ref)
652 (values (the (or tn-ref null) first) (info-args)))))
654 ;;; Convert a conditional template. We try to exploit any
655 ;;; drop-through, but emit an unconditional branch afterward if we
656 ;;; fail. NOT-P is true if the sense of the TEMPLATE's test should be
658 (defun ir2-convert-conditional (node block template args info-args if not-p)
659 (declare (type node node) (type ir2-block block)
660 (type template template) (type (or tn-ref null) args)
661 (list info-args) (type cif if) (type boolean not-p))
662 (let ((consequent (if-consequent if))
663 (alternative (if-alternative if))
664 (flags (and (consp (template-result-types template))
665 (rest (template-result-types template)))))
666 (aver (= (template-info-arg-count template)
667 (+ (length info-args)
670 (rotatef consequent alternative)
672 (when (drop-thru-p if consequent)
673 (rotatef consequent alternative)
676 (emit-template node block template args nil
677 (list* (block-label consequent) not-p
679 (if (drop-thru-p if alternative)
680 (register-drop-thru alternative)
681 (vop branch node block (block-label alternative))))
683 (emit-template node block template args nil info-args)
684 (vop branch-if node block (block-label consequent) flags not-p)
685 (if (drop-thru-p if alternative)
686 (register-drop-thru alternative)
687 (vop branch node block (block-label alternative)))))))
689 ;;; Convert an IF that isn't the DEST of a conditional template.
690 (defun ir2-convert-if (node block)
691 (declare (type ir2-block block) (type cif node))
692 (let* ((test (if-test node))
693 (test-ref (reference-tn (lvar-tn node block test) nil))
694 (nil-ref (reference-tn (emit-constant nil) nil)))
695 (setf (tn-ref-across test-ref) nil-ref)
696 (ir2-convert-conditional node block (template-or-lose 'if-eq)
697 test-ref () node t)))
699 ;;; Return a list of primitive-types that we can pass to LVAR-RESULT-TNS
700 ;;; describing the result types we want for a template call. We are really
701 ;;; only interested in the number of results required: in normal case
702 ;;; TEMPLATE-RESULTS-OK has already checked them.
703 (defun find-template-result-types (call rtypes)
704 (let* ((type (node-derived-type call))
706 (mapcar #'primitive-type
707 (if (args-type-p type)
708 (append (args-type-required type)
709 (args-type-optional type))
711 (primitive-t *backend-t-primitive-type*))
712 (loop for rtype in rtypes
713 for type = (or (pop types) primitive-t)
716 ;;; Return a list of TNs usable in a CALL to TEMPLATE delivering values to
717 ;;; LVAR. As an efficiency hack, we pick off the common case where the LVAR is
718 ;;; fixed values and has locations that satisfy the result restrictions. This
719 ;;; can fail when there is a type check or a values count mismatch.
720 (defun make-template-result-tns (call lvar rtypes)
721 (declare (type combination call) (type (or lvar null) lvar)
723 (let ((2lvar (when lvar (lvar-info lvar))))
724 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :fixed))
725 (let ((locs (ir2-lvar-locs 2lvar)))
726 (if (and (= (length rtypes) (length locs))
727 (do ((loc locs (cdr loc))
728 (rtypes rtypes (cdr rtypes)))
730 (unless (operand-restriction-ok
732 (tn-primitive-type (car loc))
738 (find-template-result-types call rtypes))))
741 (find-template-result-types call rtypes)))))
743 ;;; Get the operands into TNs, make TN-REFs for them, and then call
744 ;;; the template emit function.
745 (defun ir2-convert-template (call block)
746 (declare (type combination call) (type ir2-block block))
747 (let* ((template (combination-info call))
748 (lvar (node-lvar call))
749 (rtypes (template-result-types template)))
750 (multiple-value-bind (args info-args)
751 (reference-args call block (combination-args call) template)
752 (aver (not (template-more-results-type template)))
753 (if (template-conditional-p template)
754 (ir2-convert-conditional call block template args info-args
755 (lvar-dest lvar) nil)
756 (let* ((results (make-template-result-tns call lvar rtypes))
757 (r-refs (reference-tn-list results t)))
758 (aver (= (length info-args)
759 (template-info-arg-count template)))
760 (when (and lvar (lvar-dynamic-extent lvar))
761 (vop current-stack-pointer call block
762 (ir2-lvar-stack-pointer (lvar-info lvar))))
763 (when (emit-step-p call)
764 (vop sb!vm::step-instrument-before-vop call block))
766 (emit-template call block template args r-refs info-args)
767 (emit-template call block template args r-refs))
768 (move-lvar-result call block results lvar)))))
771 ;;; We don't have to do much because operand count checking is done by
772 ;;; IR1 conversion. The only difference between this and the function
773 ;;; case of IR2-CONVERT-TEMPLATE is that there can be codegen-info
775 (defoptimizer (%%primitive ir2-convert) ((template info &rest args) call block)
776 (let* ((template (lvar-value template))
777 (info (lvar-value info))
778 (lvar (node-lvar call))
779 (rtypes (template-result-types template))
780 (results (make-template-result-tns call lvar rtypes))
781 (r-refs (reference-tn-list results t)))
782 (multiple-value-bind (args info-args)
783 (reference-args call block (cddr (combination-args call)) template)
784 (aver (not (template-more-results-type template)))
785 (aver (not (template-conditional-p template)))
786 (aver (null info-args))
789 (emit-template call block template args r-refs info)
790 (emit-template call block template args r-refs))
792 (move-lvar-result call block results lvar)))
795 (defoptimizer (%%primitive derive-type) ((template info &rest args))
796 (let ((type (template-type (lvar-value template))))
797 (if (fun-type-p type)
798 (fun-type-returns type)
803 ;;; Convert a LET by moving the argument values into the variables.
804 ;;; Since a LET doesn't have any passing locations, we move the
805 ;;; arguments directly into the variables. We must also allocate any
806 ;;; indirect value cells, since there is no function prologue to do
808 (defun ir2-convert-let (node block fun)
809 (declare (type combination node) (type ir2-block block) (type clambda fun))
810 (mapc (lambda (var arg)
812 (let ((src (lvar-tn node block arg))
813 (dest (leaf-info var)))
814 (if (and (lambda-var-indirect var)
815 (lambda-var-explicit-value-cell var))
816 (emit-make-value-cell node block src dest)
817 (emit-move node block src dest)))))
818 (lambda-vars fun) (basic-combination-args node))
821 ;;; Emit any necessary moves into assignment temps for a local call to
822 ;;; FUN. We return two lists of TNs: TNs holding the actual argument
823 ;;; values, and (possibly EQ) TNs that are the actual destination of
824 ;;; the arguments. When necessary, we allocate temporaries for
825 ;;; arguments to preserve parallel assignment semantics. These lists
826 ;;; exclude unused arguments and include implicit environment
827 ;;; arguments, i.e. they exactly correspond to the arguments passed.
829 ;;; OLD-FP is the TN currently holding the value we want to pass as
830 ;;; OLD-FP. If null, then the call is to the same environment (an
831 ;;; :ASSIGNMENT), so we only move the arguments, and leave the
832 ;;; environment alone.
834 ;;; CLOSURE-FP is for calling a closure that has "implicit" value
835 ;;; cells (stored in the allocating stack frame), and is the frame
836 ;;; pointer TN to use for values allocated in the outbound stack
837 ;;; frame. This is distinct from OLD-FP for the specific case of a
839 (defun emit-psetq-moves (node block fun old-fp &optional (closure-fp old-fp))
840 (declare (type combination node) (type ir2-block block) (type clambda fun)
841 (type (or tn null) old-fp closure-fp))
842 (let ((actuals (mapcar (lambda (x)
844 (lvar-tn node block x)))
845 (combination-args node))))
848 (dolist (var (lambda-vars fun))
849 (let ((actual (pop actuals))
850 (loc (leaf-info var)))
853 ((and (lambda-var-indirect var)
854 (lambda-var-explicit-value-cell var))
856 (make-normal-tn *backend-t-primitive-type*)))
857 (emit-make-value-cell node block actual temp)
859 ((member actual (locs))
860 (let ((temp (make-normal-tn (tn-primitive-type loc))))
861 (emit-move node block actual temp)
868 (let ((this-1env (node-physenv node))
869 (called-env (physenv-info (lambda-physenv fun))))
870 (dolist (thing (ir2-physenv-closure called-env))
871 (temps (closure-initial-value (car thing) this-1env closure-fp))
874 (locs (ir2-physenv-old-fp called-env))))
876 (values (temps) (locs)))))
878 ;;; A tail-recursive local call is done by emitting moves of stuff
879 ;;; into the appropriate passing locations. After setting up the args
880 ;;; and environment, we just move our return-pc into the called
881 ;;; function's passing location.
882 (defun ir2-convert-tail-local-call (node block fun)
883 (declare (type combination node) (type ir2-block block) (type clambda fun))
884 (let ((this-env (physenv-info (node-physenv node)))
885 (current-fp (make-stack-pointer-tn)))
886 (multiple-value-bind (temps locs)
887 (emit-psetq-moves node block fun
888 (ir2-physenv-old-fp this-env) current-fp)
890 ;; If we're about to emit a move from CURRENT-FP then we need to
892 (when (find current-fp temps)
893 (vop current-fp node block current-fp))
895 (mapc (lambda (temp loc)
896 (emit-move node block temp loc))
899 (emit-move node block
900 (ir2-physenv-return-pc this-env)
901 (ir2-physenv-return-pc-pass
903 (lambda-physenv fun)))))
907 ;;; Convert an :ASSIGNMENT call. This is just like a tail local call,
908 ;;; except that the caller and callee environment are the same, so we
909 ;;; don't need to mess with the environment locations, return PC, etc.
910 (defun ir2-convert-assignment (node block fun)
911 (declare (type combination node) (type ir2-block block) (type clambda fun))
912 (multiple-value-bind (temps locs) (emit-psetq-moves node block fun nil)
914 (mapc (lambda (temp loc)
915 (emit-move node block temp loc))
919 ;;; Do stuff to set up the arguments to a non-tail local call
920 ;;; (including implicit environment args.) We allocate a frame
921 ;;; (returning the FP and NFP), and also compute the TN-REFS list for
922 ;;; the values to pass and the list of passing location TNs.
923 (defun ir2-convert-local-call-args (node block fun)
924 (declare (type combination node) (type ir2-block block) (type clambda fun))
925 (let ((fp (make-stack-pointer-tn))
926 (nfp (make-number-stack-pointer-tn))
927 (old-fp (make-stack-pointer-tn)))
928 (multiple-value-bind (temps locs)
929 (emit-psetq-moves node block fun old-fp)
930 (vop current-fp node block old-fp)
931 (vop allocate-frame node block
932 (physenv-info (lambda-physenv fun))
934 (values fp nfp temps (mapcar #'make-alias-tn locs)))))
936 ;;; Handle a non-TR known-values local call. We emit the call, then
937 ;;; move the results to the lvar's destination.
938 (defun ir2-convert-local-known-call (node block fun returns lvar start)
939 (declare (type node node) (type ir2-block block) (type clambda fun)
940 (type return-info returns) (type (or lvar null) lvar)
942 (multiple-value-bind (fp nfp temps arg-locs)
943 (ir2-convert-local-call-args node block fun)
944 (let ((locs (return-info-locations returns)))
945 (vop* known-call-local node block
946 (fp nfp (reference-tn-list temps nil))
947 ((reference-tn-list locs t))
948 arg-locs (physenv-info (lambda-physenv fun)) start)
949 (move-lvar-result node block locs lvar)))
952 ;;; Handle a non-TR unknown-values local call. We do different things
953 ;;; depending on what kind of values the lvar wants.
955 ;;; If LVAR is :UNKNOWN, then we use the "multiple-" variant, directly
956 ;;; specifying the lvar's LOCS as the VOP results so that we don't
957 ;;; have to do anything after the call.
959 ;;; Otherwise, we use STANDARD-RESULT-TNS to get wired result TNs, and
960 ;;; then call MOVE-LVAR-RESULT to do any necessary type checks or
962 (defun ir2-convert-local-unknown-call (node block fun lvar start)
963 (declare (type node node) (type ir2-block block) (type clambda fun)
964 (type (or lvar null) lvar) (type label start))
965 (multiple-value-bind (fp nfp temps arg-locs)
966 (ir2-convert-local-call-args node block fun)
967 (let ((2lvar (and lvar (lvar-info lvar)))
968 (env (physenv-info (lambda-physenv fun)))
969 (temp-refs (reference-tn-list temps nil)))
970 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :unknown))
971 (vop* multiple-call-local node block (fp nfp temp-refs)
972 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
974 (let ((locs (standard-result-tns lvar)))
975 (vop* call-local node block
977 ((reference-tn-list locs t))
978 arg-locs env start (length locs))
979 (move-lvar-result node block locs lvar)))))
982 ;;; Dispatch to the appropriate function, depending on whether we have
983 ;;; a let, tail or normal call. If the function doesn't return, call
984 ;;; it using the unknown-value convention. We could compile it as a
985 ;;; tail call, but that might seem confusing in the debugger.
986 (defun ir2-convert-local-call (node block)
987 (declare (type combination node) (type ir2-block block))
988 (let* ((fun (ref-leaf (lvar-uses (basic-combination-fun node))))
989 (kind (functional-kind fun)))
990 (cond ((eq kind :let)
991 (ir2-convert-let node block fun))
992 ((eq kind :assignment)
993 (ir2-convert-assignment node block fun))
995 (ir2-convert-tail-local-call node block fun))
997 (let ((start (block-trampoline (lambda-block fun)))
998 (returns (tail-set-info (lambda-tail-set fun)))
999 (lvar (node-lvar node)))
1001 (return-info-kind returns)
1004 (ir2-convert-local-unknown-call node block fun lvar start))
1006 (ir2-convert-local-known-call node block fun returns
1012 ;;; Given a function lvar FUN, return (VALUES TN-TO-CALL NAMED-P),
1013 ;;; where TN-TO-CALL is a TN holding the thing that we call NAMED-P is
1014 ;;; true if the thing is named (false if it is a function).
1016 ;;; There are two interesting non-named cases:
1017 ;;; -- We know it's a function. No check needed: return the
1019 ;;; -- We don't know what it is.
1020 (defun fun-lvar-tn (node block lvar)
1021 (declare (ignore node block))
1022 (declare (type lvar lvar))
1023 (let ((2lvar (lvar-info lvar)))
1024 (if (eq (ir2-lvar-kind 2lvar) :delayed)
1025 (let ((name (lvar-fun-name lvar t)))
1027 (values (make-load-time-constant-tn :fdefinition name) t))
1028 (let* ((locs (ir2-lvar-locs 2lvar))
1030 (function-ptype (primitive-type-or-lose 'function)))
1031 (aver (and (eq (ir2-lvar-kind 2lvar) :fixed)
1032 (= (length locs) 1)))
1033 (aver (eq (tn-primitive-type loc) function-ptype))
1034 (values loc nil)))))
1036 ;;; Set up the args to NODE in the current frame, and return a TN-REF
1037 ;;; list for the passing locations.
1038 (defun move-tail-full-call-args (node block)
1039 (declare (type combination node) (type ir2-block block))
1040 (let ((args (basic-combination-args node))
1043 (dotimes (num (length args))
1044 (let ((loc (standard-arg-location num)))
1045 (emit-move node block (lvar-tn node block (elt args num)) loc)
1046 (let ((ref (reference-tn loc nil)))
1048 (setf (tn-ref-across last) ref)
1053 ;;; Move the arguments into the passing locations and do a (possibly
1054 ;;; named) tail call.
1055 (defun ir2-convert-tail-full-call (node block)
1056 (declare (type combination node) (type ir2-block block))
1057 (let* ((env (physenv-info (node-physenv node)))
1058 (args (basic-combination-args node))
1059 (nargs (length args))
1060 (pass-refs (move-tail-full-call-args node block))
1061 (old-fp (ir2-physenv-old-fp env))
1062 (return-pc (ir2-physenv-return-pc env)))
1064 (multiple-value-bind (fun-tn named)
1065 (fun-lvar-tn node block (basic-combination-fun node))
1067 (vop* tail-call-named node block
1068 (fun-tn old-fp return-pc pass-refs)
1072 (vop* tail-call node block
1073 (fun-tn old-fp return-pc pass-refs)
1076 (emit-step-p node)))))
1080 ;;; like IR2-CONVERT-LOCAL-CALL-ARGS, only different
1081 (defun ir2-convert-full-call-args (node block)
1082 (declare (type combination node) (type ir2-block block))
1083 (let* ((args (basic-combination-args node))
1084 (fp (make-stack-pointer-tn))
1085 (nargs (length args)))
1086 (vop allocate-full-call-frame node block nargs fp)
1090 (dotimes (num nargs)
1091 (locs (standard-arg-location num))
1092 (let ((ref (reference-tn (lvar-tn node block (elt args num))
1095 (setf (tn-ref-across last) ref)
1099 (values fp first (locs) nargs)))))
1101 ;;; Do full call when a fixed number of values are desired. We make
1102 ;;; STANDARD-RESULT-TNS for our lvar, then deliver the result using
1103 ;;; MOVE-LVAR-RESULT. We do named or normal call, as appropriate.
1104 (defun ir2-convert-fixed-full-call (node block)
1105 (declare (type combination node) (type ir2-block block))
1106 (multiple-value-bind (fp args arg-locs nargs)
1107 (ir2-convert-full-call-args node block)
1108 (let* ((lvar (node-lvar node))
1109 (locs (standard-result-tns lvar))
1110 (loc-refs (reference-tn-list locs t))
1111 (nvals (length locs)))
1112 (multiple-value-bind (fun-tn named)
1113 (fun-lvar-tn node block (basic-combination-fun node))
1115 (vop* call-named node block (fp fun-tn args) (loc-refs)
1116 arg-locs nargs nvals (emit-step-p node))
1117 (vop* call node block (fp fun-tn args) (loc-refs)
1118 arg-locs nargs nvals (emit-step-p node)))
1119 (move-lvar-result node block locs lvar))))
1122 ;;; Do full call when unknown values are desired.
1123 (defun ir2-convert-multiple-full-call (node block)
1124 (declare (type combination node) (type ir2-block block))
1125 (multiple-value-bind (fp args arg-locs nargs)
1126 (ir2-convert-full-call-args node block)
1127 (let* ((lvar (node-lvar node))
1128 (locs (ir2-lvar-locs (lvar-info lvar)))
1129 (loc-refs (reference-tn-list locs t)))
1130 (multiple-value-bind (fun-tn named)
1131 (fun-lvar-tn node block (basic-combination-fun node))
1133 (vop* multiple-call-named node block (fp fun-tn args) (loc-refs)
1134 arg-locs nargs (emit-step-p node))
1135 (vop* multiple-call node block (fp fun-tn args) (loc-refs)
1136 arg-locs nargs (emit-step-p node))))))
1139 ;;; stuff to check in PONDER-FULL-CALL
1141 ;;; These came in handy when troubleshooting cold boot after making
1142 ;;; major changes in the package structure: various transforms and
1143 ;;; VOPs and stuff got attached to the wrong symbol, so that
1144 ;;; references to the right symbol were bogusly translated as full
1145 ;;; calls instead of primitives, sending the system off into infinite
1146 ;;; space. Having a report on all full calls generated makes it easier
1147 ;;; to figure out what form caused the problem this time.
1148 #!+sb-show (defvar *show-full-called-fnames-p* nil)
1149 #!+sb-show (defvar *full-called-fnames* (make-hash-table :test 'equal))
1151 ;;; Do some checks (and store some notes relevant for future checks)
1153 ;;; * Is this a full call to something we have reason to know should
1154 ;;; never be full called? (Except as of sbcl-0.7.18 or so, we no
1155 ;;; longer try to ensure this behavior when *FAILURE-P* has already
1157 ;;; * Is this a full call to (SETF FOO) which might conflict with
1158 ;;; a DEFSETF or some such thing elsewhere in the program?
1159 (defun ponder-full-call (node)
1160 (let* ((lvar (basic-combination-fun node))
1161 (fname (lvar-fun-name lvar t)))
1162 (declare (type (or symbol cons) fname))
1164 #!+sb-show (unless (gethash fname *full-called-fnames*)
1165 (setf (gethash fname *full-called-fnames*) t))
1166 #!+sb-show (when *show-full-called-fnames-p*
1167 (/show "converting full call to named function" fname)
1168 (/show (basic-combination-args node))
1169 (/show (policy node speed) (policy node safety))
1170 (/show (policy node compilation-speed))
1171 (let ((arg-types (mapcar (lambda (lvar)
1175 (basic-combination-args node))))
1178 ;; When illegal code is compiled, all sorts of perverse paths
1179 ;; through the compiler can be taken, and it's much harder -- and
1180 ;; probably pointless -- to guarantee that always-optimized-away
1181 ;; functions are actually optimized away. Thus, we skip the check
1184 ;; check to see if we know anything about the function
1185 (let ((info (info :function :info fname)))
1186 ;; if we know something, check to see if the full call was valid
1187 (when (and info (ir1-attributep (fun-info-attributes info)
1188 always-translatable))
1189 (/show (policy node speed) (policy node safety))
1190 (/show (policy node compilation-speed))
1191 (bug "full call to ~S" fname))))
1194 (aver (legal-fun-name-p fname))
1195 (destructuring-bind (setfoid &rest stem) fname
1196 (when (eq setfoid 'setf)
1197 (setf (gethash (car stem) *setf-assumed-fboundp*) t))))))
1199 ;;; If the call is in a tail recursive position and the return
1200 ;;; convention is standard, then do a tail full call. If one or fewer
1201 ;;; values are desired, then use a single-value call, otherwise use a
1202 ;;; multiple-values call.
1203 (defun ir2-convert-full-call (node block)
1204 (declare (type combination node) (type ir2-block block))
1205 (ponder-full-call node)
1206 (cond ((node-tail-p node)
1207 (ir2-convert-tail-full-call node block))
1208 ((let ((lvar (node-lvar node)))
1210 (eq (ir2-lvar-kind (lvar-info lvar)) :unknown)))
1211 (ir2-convert-multiple-full-call node block))
1213 (ir2-convert-fixed-full-call node block)))
1216 ;;;; entering functions
1218 ;;; Do all the stuff that needs to be done on XEP entry:
1219 ;;; -- Create frame.
1220 ;;; -- Copy any more arg.
1221 ;;; -- Set up the environment, accessing any closure variables.
1222 ;;; -- Move args from the standard passing locations to their internal
1224 (defun init-xep-environment (node block fun)
1225 (declare (type bind node) (type ir2-block block) (type clambda fun))
1226 (let ((start-label (entry-info-offset (leaf-info fun)))
1227 (env (physenv-info (node-physenv node))))
1228 (let ((ef (functional-entry-fun fun)))
1229 (cond ((and (optional-dispatch-p ef) (optional-dispatch-more-entry ef))
1230 ;; Special case the xep-allocate-frame + copy-more-arg case.
1231 (vop xep-allocate-frame node block start-label t)
1232 (vop copy-more-arg node block (optional-dispatch-max-args ef)))
1234 ;; No more args, so normal entry.
1235 (vop xep-allocate-frame node block start-label nil)))
1236 (if (ir2-physenv-closure env)
1237 (let ((closure (make-normal-tn *backend-t-primitive-type*)))
1238 (vop setup-closure-environment node block start-label closure)
1240 (dolist (loc (ir2-physenv-closure env))
1241 (vop closure-ref node block closure (incf n) (cdr loc)))))
1242 (vop setup-environment node block start-label)))
1244 (unless (eq (functional-kind fun) :toplevel)
1245 (let ((vars (lambda-vars fun))
1247 (when (leaf-refs (first vars))
1248 (emit-move node block (make-arg-count-location)
1249 (leaf-info (first vars))))
1250 (dolist (arg (rest vars))
1251 (when (leaf-refs arg)
1252 (let ((pass (standard-arg-location n))
1253 (home (leaf-info arg)))
1254 (if (and (lambda-var-indirect arg)
1255 (lambda-var-explicit-value-cell arg))
1256 (emit-make-value-cell node block pass home)
1257 (emit-move node block pass home))))
1260 (emit-move node block (make-old-fp-passing-location t)
1261 (ir2-physenv-old-fp env)))
1265 ;;; Emit function prolog code. This is only called on bind nodes for
1266 ;;; functions that allocate environments. All semantics of let calls
1267 ;;; are handled by IR2-CONVERT-LET.
1269 ;;; If not an XEP, all we do is move the return PC from its passing
1270 ;;; location, since in a local call, the caller allocates the frame
1271 ;;; and sets up the arguments.
1272 (defun ir2-convert-bind (node block)
1273 (declare (type bind node) (type ir2-block block))
1274 (let* ((fun (bind-lambda node))
1275 (env (physenv-info (lambda-physenv fun))))
1276 (aver (member (functional-kind fun)
1277 '(nil :external :optional :toplevel :cleanup)))
1280 (init-xep-environment node block fun)
1282 (when *collect-dynamic-statistics*
1283 (vop count-me node block *dynamic-counts-tn*
1284 (block-number (ir2-block-block block)))))
1288 (ir2-physenv-return-pc-pass env)
1289 (ir2-physenv-return-pc env))
1291 #!+unwind-to-frame-and-call-vop
1292 (when (and (lambda-allow-instrumenting fun)
1293 (not (lambda-inline-expanded fun))
1295 (policy fun (>= insert-debug-catch 2)))
1296 (vop sb!vm::bind-sentinel node block))
1298 (let ((lab (gen-label)))
1299 (setf (ir2-physenv-environment-start env) lab)
1300 (vop note-environment-start node block lab)
1302 (unless (policy fun (>= inhibit-safepoints 2))
1303 (vop sb!vm::insert-safepoint node block))))
1307 ;;;; function return
1309 ;;; Do stuff to return from a function with the specified values and
1310 ;;; convention. If the return convention is :FIXED and we aren't
1311 ;;; returning from an XEP, then we do a known return (letting
1312 ;;; representation selection insert the correct move-arg VOPs.)
1313 ;;; Otherwise, we use the unknown-values convention. If there is a
1314 ;;; fixed number of return values, then use RETURN, otherwise use
1315 ;;; RETURN-MULTIPLE.
1316 (defun ir2-convert-return (node block)
1317 (declare (type creturn node) (type ir2-block block))
1318 (let* ((lvar (return-result node))
1319 (2lvar (lvar-info lvar))
1320 (lvar-kind (ir2-lvar-kind 2lvar))
1321 (fun (return-lambda node))
1322 (env (physenv-info (lambda-physenv fun)))
1323 (old-fp (ir2-physenv-old-fp env))
1324 (return-pc (ir2-physenv-return-pc env))
1325 (returns (tail-set-info (lambda-tail-set fun))))
1326 #!+unwind-to-frame-and-call-vop
1327 (when (and (lambda-allow-instrumenting fun)
1328 (not (lambda-inline-expanded fun))
1329 (policy fun (>= insert-debug-catch 2)))
1330 (vop sb!vm::unbind-sentinel node block))
1332 ((and (eq (return-info-kind returns) :fixed)
1334 (let ((locs (lvar-tns node block lvar
1335 (return-info-types returns))))
1336 (vop* known-return node block
1337 (old-fp return-pc (reference-tn-list locs nil))
1339 (return-info-locations returns))))
1340 ((eq lvar-kind :fixed)
1341 (let* ((types (mapcar #'tn-primitive-type (ir2-lvar-locs 2lvar)))
1342 (lvar-locs (lvar-tns node block lvar types))
1343 (nvals (length lvar-locs))
1344 (locs (make-standard-value-tns nvals)))
1345 (mapc (lambda (val loc)
1346 (emit-move node block val loc))
1350 (vop return-single node block old-fp return-pc (car locs))
1351 (vop* return node block
1352 (old-fp return-pc (reference-tn-list locs nil))
1356 (aver (eq lvar-kind :unknown))
1357 (vop* return-multiple node block
1359 (reference-tn-list (ir2-lvar-locs 2lvar) nil))
1366 ;;;; These are used by the debugger to find the top function on the
1367 ;;;; stack. They return the OLD-FP and RETURN-PC for the current
1368 ;;;; function as multiple values.
1370 (defoptimizer (%caller-frame ir2-convert) (() node block)
1371 (let ((ir2-physenv (physenv-info (node-physenv node))))
1372 (move-lvar-result node block
1373 (list (ir2-physenv-old-fp ir2-physenv))
1376 (defoptimizer (%caller-pc ir2-convert) (() node block)
1377 (let ((ir2-physenv (physenv-info (node-physenv node))))
1378 (move-lvar-result node block
1379 (list (ir2-physenv-return-pc ir2-physenv))
1382 ;;;; multiple values
1384 ;;; This is almost identical to IR2-CONVERT-LET. Since LTN annotates
1385 ;;; the lvar for the correct number of values (with the lvar user
1386 ;;; responsible for defaulting), we can just pick them up from the
1388 (defun ir2-convert-mv-bind (node block)
1389 (declare (type mv-combination node) (type ir2-block block))
1390 (let* ((lvar (first (basic-combination-args node)))
1391 (fun (ref-leaf (lvar-uses (basic-combination-fun node))))
1392 (vars (lambda-vars fun)))
1393 (aver (eq (functional-kind fun) :mv-let))
1394 (mapc (lambda (src var)
1395 (when (leaf-refs var)
1396 (let ((dest (leaf-info var)))
1397 (if (and (lambda-var-indirect var)
1398 (lambda-var-explicit-value-cell var))
1399 (emit-make-value-cell node block src dest)
1400 (emit-move node block src dest)))))
1401 (lvar-tns node block lvar
1403 (primitive-type (leaf-type x)))
1408 ;;; Emit the appropriate fixed value, unknown value or tail variant of
1409 ;;; CALL-VARIABLE. Note that we only need to pass the values start for
1410 ;;; the first argument: all the other argument lvar TNs are
1411 ;;; ignored. This is because we require all of the values globs to be
1412 ;;; contiguous and on stack top.
1413 (defun ir2-convert-mv-call (node block)
1414 (declare (type mv-combination node) (type ir2-block block))
1415 (aver (basic-combination-args node))
1416 (let* ((start-lvar (lvar-info (first (basic-combination-args node))))
1417 (start (first (ir2-lvar-locs start-lvar)))
1418 (tails (and (node-tail-p node)
1419 (lambda-tail-set (node-home-lambda node))))
1420 (lvar (node-lvar node))
1421 (2lvar (and lvar (lvar-info lvar))))
1422 (multiple-value-bind (fun named)
1423 (fun-lvar-tn node block (basic-combination-fun node))
1424 (aver (and (not named)
1425 (eq (ir2-lvar-kind start-lvar) :unknown)))
1428 (let ((env (physenv-info (node-physenv node))))
1429 (vop tail-call-variable node block start fun
1430 (ir2-physenv-old-fp env)
1431 (ir2-physenv-return-pc env))))
1433 (eq (ir2-lvar-kind 2lvar) :unknown))
1434 (vop* multiple-call-variable node block (start fun nil)
1435 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
1436 (emit-step-p node)))
1438 (let ((locs (standard-result-tns lvar)))
1439 (vop* call-variable node block (start fun nil)
1440 ((reference-tn-list locs t)) (length locs)
1442 (move-lvar-result node block locs lvar)))))))
1444 ;;; Reset the stack pointer to the start of the specified
1445 ;;; unknown-values lvar (discarding it and all values globs on top of
1447 (defoptimizer (%pop-values ir2-convert) ((%lvar) node block)
1448 (let* ((lvar (lvar-value %lvar))
1449 (2lvar (lvar-info lvar)))
1450 (cond ((eq (ir2-lvar-kind 2lvar) :unknown)
1451 (vop reset-stack-pointer node block
1452 (first (ir2-lvar-locs 2lvar))))
1453 ((lvar-dynamic-extent lvar)
1454 (vop reset-stack-pointer node block
1455 (ir2-lvar-stack-pointer 2lvar)))
1456 (t (bug "Trying to pop a not stack-allocated LVAR ~S."
1459 (defoptimizer (%nip-values ir2-convert) ((last-nipped last-preserved
1462 (let* ( ;; pointer immediately after the nipped block
1463 (after (lvar-value last-nipped))
1464 (2after (lvar-info after))
1465 ;; pointer to the first nipped word
1466 (first (lvar-value last-preserved))
1467 (2first (lvar-info first))
1469 (moved-tns (loop for lvar-ref in moved
1470 for lvar = (lvar-value lvar-ref)
1471 for 2lvar = (lvar-info lvar)
1473 collect (first (ir2-lvar-locs 2lvar)))))
1474 (aver (or (eq (ir2-lvar-kind 2after) :unknown)
1475 (lvar-dynamic-extent after)))
1476 (aver (eq (ir2-lvar-kind 2first) :unknown))
1477 (when *check-consistency*
1478 ;; we cannot move stack-allocated DX objects
1479 (dolist (moved-lvar moved)
1480 (aver (eq (ir2-lvar-kind (lvar-info (lvar-value moved-lvar)))
1482 (flet ((nip-aligned (nipped)
1483 (vop* %%nip-values node block
1485 (first (ir2-lvar-locs 2first))
1486 (reference-tn-list moved-tns nil))
1487 ((reference-tn-list moved-tns t)))))
1488 (cond ((eq (ir2-lvar-kind 2after) :unknown)
1489 (nip-aligned (first (ir2-lvar-locs 2after))))
1490 ((lvar-dynamic-extent after)
1491 (nip-aligned (ir2-lvar-stack-pointer 2after)))
1493 (bug "Trying to nip a not stack-allocated LVAR ~S." after))))))
1495 ;;; Deliver the values TNs to LVAR using MOVE-LVAR-RESULT.
1496 (defoptimizer (values ir2-convert) ((&rest values) node block)
1497 (let ((tns (mapcar (lambda (x)
1498 (lvar-tn node block x))
1500 (move-lvar-result node block tns (node-lvar node))))
1502 ;;; In the normal case where unknown values are desired, we use the
1503 ;;; VALUES-LIST VOP. In the relatively unimportant case of VALUES-LIST
1504 ;;; for a fixed number of values, we punt by doing a full call to the
1505 ;;; VALUES-LIST function. This gets the full call VOP to deal with
1506 ;;; defaulting any unsupplied values. It seems unworthwhile to
1507 ;;; optimize this case.
1508 (defoptimizer (values-list ir2-convert) ((list) node block)
1509 (let* ((lvar (node-lvar node))
1510 (2lvar (and lvar (lvar-info lvar))))
1512 (eq (ir2-lvar-kind 2lvar) :unknown))
1513 (let ((locs (ir2-lvar-locs 2lvar)))
1514 (vop* values-list node block
1515 ((lvar-tn node block list) nil)
1516 ((reference-tn-list locs t)))))
1517 (t (aver (or (not 2lvar) ; i.e. we want to check the argument
1518 (eq (ir2-lvar-kind 2lvar) :fixed)))
1519 (ir2-convert-full-call node block)))))
1521 (defoptimizer (%more-arg-values ir2-convert) ((context start count) node block)
1522 (binding* ((lvar (node-lvar node) :exit-if-null)
1523 (2lvar (lvar-info lvar)))
1524 (ecase (ir2-lvar-kind 2lvar)
1526 ;; KLUDGE: this is very much unsafe, and can leak random stack values.
1527 ;; OTOH, I think the :FIXED case can only happen with (safety 0) in the
1530 (loop for loc in (ir2-lvar-locs 2lvar)
1532 do (vop sb!vm::more-arg node block
1533 (lvar-tn node block context)
1537 (let ((locs (ir2-lvar-locs 2lvar)))
1538 (vop* %more-arg-values node block
1539 ((lvar-tn node block context)
1540 (lvar-tn node block start)
1541 (lvar-tn node block count)
1543 ((reference-tn-list locs t))))))))
1545 ;;;; special binding
1547 ;;; This is trivial, given our assumption of a shallow-binding
1549 (defoptimizer (%special-bind ir2-convert) ((var value) node block)
1550 (let ((name (leaf-source-name (lvar-value var))))
1551 (vop bind node block (lvar-tn node block value)
1552 (emit-constant name))))
1553 (defoptimizer (%special-unbind ir2-convert) ((var) node block)
1554 (vop unbind node block))
1556 ;;; ### It's not clear that this really belongs in this file, or
1557 ;;; should really be done this way, but this is the least violation of
1558 ;;; abstraction in the current setup. We don't want to wire
1559 ;;; shallow-binding assumptions into IR1tran.
1560 (def-ir1-translator progv
1561 ((vars vals &body body) start next result)
1564 (with-unique-names (bind unbind)
1565 (once-only ((n-save-bs '(%primitive current-binding-pointer)))
1568 (labels ((,unbind (vars)
1569 (declare (optimize (speed 2) (debug 0)))
1570 (let ((unbound-marker (%primitive make-unbound-marker)))
1572 ;; CLHS says "bound and then made to have no value" -- user
1573 ;; should not be able to tell the difference between that and this.
1574 (about-to-modify-symbol-value var 'progv)
1575 (%primitive bind unbound-marker var))))
1577 (declare (optimize (speed 2) (debug 0)
1578 (insert-debug-catch 0)))
1580 ((null vals) (,unbind vars))
1582 (let ((val (car vals))
1584 (about-to-modify-symbol-value var 'progv val t)
1585 (%primitive bind val var))
1586 (,bind (cdr vars) (cdr vals))))))
1587 (,bind ,vars ,vals))
1590 ;; Technically ANSI CL doesn't allow declarations at the
1591 ;; start of the cleanup form. SBCL happens to allow for
1592 ;; them, due to the way the UNWIND-PROTECT ir1 translation
1593 ;; is implemented; the cleanup forms are directly spliced
1594 ;; into an FLET definition body. And a declaration here
1595 ;; actually has exactly the right scope for what we need
1596 ;; (ensure that debug instrumentation is not emitted for the
1597 ;; cleanup function). -- JES, 2007-06-16
1598 (declare (optimize (insert-debug-catch 0)))
1599 (%primitive unbind-to-here ,n-save-bs))))))
1603 ;;; Convert a non-local lexical exit. First find the NLX-INFO in our
1604 ;;; environment. Note that this is never called on the escape exits
1605 ;;; for CATCH and UNWIND-PROTECT, since the escape functions aren't
1607 (defun ir2-convert-exit (node block)
1608 (declare (type exit node) (type ir2-block block))
1609 (let* ((nlx (exit-nlx-info node))
1610 (loc (find-in-physenv nlx (node-physenv node)))
1611 (temp (make-stack-pointer-tn))
1612 (value (exit-value node)))
1613 (if (nlx-info-safe-p nlx)
1614 (vop value-cell-ref node block loc temp)
1615 (emit-move node block loc temp))
1617 (let ((locs (ir2-lvar-locs (lvar-info value))))
1618 (vop unwind node block temp (first locs) (second locs)))
1619 (let ((0-tn (emit-constant 0)))
1620 (vop unwind node block temp 0-tn 0-tn))))
1624 ;;; %CLEANUP-POINT doesn't do anything except prevent the body from
1625 ;;; being entirely deleted.
1626 (defoptimizer (%cleanup-point ir2-convert) (() node block) node block)
1628 ;;; This function invalidates a lexical exit on exiting from the
1629 ;;; dynamic extent. This is done by storing 0 into the indirect value
1630 ;;; cell that holds the closed unwind block.
1631 (defoptimizer (%lexical-exit-breakup ir2-convert) ((info) node block)
1632 (let ((nlx (lvar-value info)))
1633 (when (nlx-info-safe-p nlx)
1634 (vop value-cell-set node block
1635 (find-in-physenv nlx (node-physenv node))
1636 (emit-constant 0)))))
1638 ;;; We have to do a spurious move of no values to the result lvar so
1639 ;;; that lifetime analysis won't get confused.
1640 (defun ir2-convert-throw (node block)
1641 (declare (type mv-combination node) (type ir2-block block))
1642 (let ((args (basic-combination-args node)))
1643 (check-catch-tag-type (first args))
1644 (vop* throw node block
1645 ((lvar-tn node block (first args))
1647 (ir2-lvar-locs (lvar-info (second args)))
1650 (move-lvar-result node block () (node-lvar node))
1653 ;;; Emit code to set up a non-local exit. INFO is the NLX-INFO for the
1654 ;;; exit, and TAG is the lvar for the catch tag (if any.) We get at
1655 ;;; the target PC by passing in the label to the vop. The vop is
1656 ;;; responsible for building a return-PC object.
1657 (defun emit-nlx-start (node block info tag)
1658 (declare (type node node) (type ir2-block block) (type nlx-info info)
1659 (type (or lvar null) tag))
1660 (let* ((2info (nlx-info-info info))
1661 (kind (cleanup-kind (nlx-info-cleanup info)))
1662 (block-tn (physenv-live-tn
1663 (make-normal-tn (primitive-type-or-lose 'catch-block))
1664 (node-physenv node)))
1665 (res (make-stack-pointer-tn))
1666 (target-label (ir2-nlx-info-target 2info)))
1668 (vop current-binding-pointer node block
1669 (car (ir2-nlx-info-dynamic-state 2info)))
1670 (vop* save-dynamic-state node block
1672 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info)) t)))
1673 (vop current-stack-pointer node block (ir2-nlx-info-save-sp 2info))
1677 (vop make-catch-block node block block-tn
1678 (lvar-tn node block tag) target-label res))
1679 ((:unwind-protect :block :tagbody)
1680 (vop make-unwind-block node block block-tn target-label res)))
1684 (if (nlx-info-safe-p info)
1685 (emit-make-value-cell node block res (ir2-nlx-info-home 2info))
1686 (emit-move node block res (ir2-nlx-info-home 2info))))
1688 (vop set-unwind-protect node block block-tn))
1693 ;;; Scan each of ENTRY's exits, setting up the exit for each lexical exit.
1694 (defun ir2-convert-entry (node block)
1695 (declare (type entry node) (type ir2-block block))
1697 (dolist (exit (entry-exits node))
1698 (let ((info (exit-nlx-info exit)))
1700 (not (memq info nlxes))
1701 (member (cleanup-kind (nlx-info-cleanup info))
1702 '(:block :tagbody)))
1704 (emit-nlx-start node block info nil)))))
1707 ;;; Set up the unwind block for these guys.
1708 (defoptimizer (%catch ir2-convert) ((info-lvar tag) node block)
1709 (check-catch-tag-type tag)
1710 (emit-nlx-start node block (lvar-value info-lvar) tag))
1711 (defoptimizer (%unwind-protect ir2-convert) ((info-lvar cleanup) node block)
1712 (emit-nlx-start node block (lvar-value info-lvar) nil))
1714 ;;; Emit the entry code for a non-local exit. We receive values and
1715 ;;; restore dynamic state.
1717 ;;; In the case of a lexical exit or CATCH, we look at the exit lvar's
1718 ;;; kind to determine which flavor of entry VOP to emit. If unknown
1719 ;;; values, emit the xxx-MULTIPLE variant to the lvar locs. If fixed
1720 ;;; values, make the appropriate number of temps in the standard
1721 ;;; values locations and use the other variant, delivering the temps
1722 ;;; to the lvar using MOVE-LVAR-RESULT.
1724 ;;; In the UNWIND-PROTECT case, we deliver the first register
1725 ;;; argument, the argument count and the argument pointer to our lvar
1726 ;;; as multiple values. These values are the block exited to and the
1727 ;;; values start and count.
1729 ;;; After receiving values, we restore dynamic state. Except in the
1730 ;;; UNWIND-PROTECT case, the values receiving restores the stack
1731 ;;; pointer. In an UNWIND-PROTECT cleanup, we want to leave the stack
1732 ;;; pointer alone, since the thrown values are still out there.
1733 (defoptimizer (%nlx-entry ir2-convert) ((info-lvar) node block)
1734 (let* ((info (lvar-value info-lvar))
1735 (lvar (node-lvar node))
1736 (2info (nlx-info-info info))
1737 (top-loc (ir2-nlx-info-save-sp 2info))
1738 (start-loc (make-nlx-entry-arg-start-location))
1739 (count-loc (make-arg-count-location))
1740 (target (ir2-nlx-info-target 2info)))
1742 (ecase (cleanup-kind (nlx-info-cleanup info))
1743 ((:catch :block :tagbody)
1744 (let ((2lvar (and lvar (lvar-info lvar))))
1745 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :unknown))
1746 (vop* nlx-entry-multiple node block
1747 (top-loc start-loc count-loc nil)
1748 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
1750 (let ((locs (standard-result-tns lvar)))
1751 (vop* nlx-entry node block
1752 (top-loc start-loc count-loc nil)
1753 ((reference-tn-list locs t))
1756 (move-lvar-result node block locs lvar)))))
1758 (let ((block-loc (standard-arg-location 0)))
1759 (vop uwp-entry node block target block-loc start-loc count-loc)
1762 (list block-loc start-loc count-loc)
1766 (when *collect-dynamic-statistics*
1767 (vop count-me node block *dynamic-counts-tn*
1768 (block-number (ir2-block-block block))))
1770 (vop* restore-dynamic-state node block
1771 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info)) nil))
1773 (vop unbind-to-here node block
1774 (car (ir2-nlx-info-dynamic-state 2info)))))
1776 ;;;; n-argument functions
1778 (macrolet ((def (name)
1779 `(defoptimizer (,name ir2-convert) ((&rest args) node block)
1780 (let* ((refs (move-tail-full-call-args node block))
1781 (lvar (node-lvar node))
1782 (res (lvar-result-tns
1784 (list (primitive-type (specifier-type 'list))))))
1785 (when (and lvar (lvar-dynamic-extent lvar))
1786 (vop current-stack-pointer node block
1787 (ir2-lvar-stack-pointer (lvar-info lvar))))
1788 (vop* ,name node block (refs) ((first res) nil)
1790 (move-lvar-result node block res lvar)))))
1795 (defoptimizer (mask-signed-field ir2-convert) ((width x) node block)
1797 (when (constant-lvar-p width)
1798 (case (lvar-value width)
1799 (#.(- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits)
1800 (when (or (csubtypep (lvar-type x)
1801 (specifier-type 'word))
1802 (csubtypep (lvar-type x)
1803 (specifier-type 'sb!vm:signed-word)))
1804 (let* ((lvar (node-lvar node))
1805 (temp (make-normal-tn
1806 (if (csubtypep (lvar-type x)
1807 (specifier-type 'word))
1808 (primitive-type-of most-positive-word)
1810 (- (ash most-positive-word -1))))))
1811 (results (lvar-result-tns
1813 (list (primitive-type-or-lose 'fixnum)))))
1814 (emit-move node block (lvar-tn node block x) temp)
1815 (vop sb!vm::move-from-word/fixnum node block
1816 temp (first results))
1817 (move-lvar-result node block results lvar)
1819 (#.sb!vm:n-word-bits
1820 (when (csubtypep (lvar-type x) (specifier-type 'word))
1821 (let* ((lvar (node-lvar node))
1822 (temp (make-normal-tn
1823 (primitive-type-of most-positive-word)))
1824 (results (lvar-result-tns
1826 (list (primitive-type
1827 (specifier-type 'sb!vm:signed-word))))))
1828 (emit-move node block (lvar-tn node block x) temp)
1829 (vop sb!vm::word-move node block
1830 temp (first results))
1831 (move-lvar-result node block results lvar)
1833 (if (template-p (basic-combination-info node))
1834 (ir2-convert-template node block)
1835 (ir2-convert-full-call node block))))
1837 ;;; Convert the code in a component into VOPs.
1838 (defun ir2-convert (component)
1839 (declare (type component component))
1840 (let (#!+sb-dyncount
1841 (*dynamic-counts-tn*
1842 (when *collect-dynamic-statistics*
1844 (block-number (block-next (component-head component))))
1845 (counts (make-array blocks
1846 :element-type '(unsigned-byte 32)
1847 :initial-element 0))
1848 (info (make-dyncount-info
1849 :for (component-name component)
1850 :costs (make-array blocks
1851 :element-type '(unsigned-byte 32)
1854 (setf (ir2-component-dyncount-info (component-info component))
1856 (emit-constant info)
1857 (emit-constant counts)))))
1859 (declare (type index num))
1860 (do-ir2-blocks (2block component)
1861 (let ((block (ir2-block-block 2block)))
1862 (when (block-start block)
1863 (setf (block-number block) num)
1865 (when *collect-dynamic-statistics*
1866 (let ((first-node (block-start-node block)))
1867 (unless (or (and (bind-p first-node)
1868 (xep-p (bind-lambda first-node)))
1870 (node-lvar first-node))
1875 #!+sb-dyncount *dynamic-counts-tn* #!-sb-dyncount nil
1878 (let ((first-node (block-start-node block)))
1879 (unless (or (and (bind-p first-node)
1880 (xep-p (bind-lambda first-node)))
1881 (and (valued-node-p first-node)
1882 (node-lvar first-node)
1884 (node-lvar first-node))
1886 (when (and (rest (block-pred block))
1888 (member (loop-kind (block-loop block))
1889 '(:natural :strange))
1890 (eq block (loop-head (block-loop block)))
1891 (policy first-node (< inhibit-safepoints 2)))
1892 (vop sb!vm::insert-safepoint first-node 2block))))
1893 (ir2-convert-block block)
1897 ;;; If necessary, emit a terminal unconditional branch to go to the
1898 ;;; successor block. If the successor is the component tail, then
1899 ;;; there isn't really any successor, but if the end is a non-tail
1900 ;;; call to a function that's not *known* to never return, then we
1901 ;;; emit an error trap just in case the function really does return.
1903 ;;; Trapping after known calls makes it easier to understand type
1904 ;;; derivation bugs at runtime: they show up as nil-fun-returned-error,
1905 ;;; rather than the execution of arbitrary code or error traps.
1906 (defun finish-ir2-block (block)
1907 (declare (type cblock block))
1908 (let* ((2block (block-info block))
1909 (last (block-last block))
1910 (succ (block-succ block)))
1912 (aver (singleton-p succ))
1913 (let ((target (first succ)))
1914 (cond ((eq target (component-tail (block-component block)))
1915 (when (and (basic-combination-p last)
1916 (or (eq (basic-combination-kind last) :full)
1917 (and (eq (basic-combination-kind last) :known)
1918 (eq (basic-combination-info last) :full))))
1919 (let* ((fun (basic-combination-fun last))
1920 (use (lvar-uses fun))
1921 (name (and (ref-p use)
1922 (leaf-has-source-name-p (ref-leaf use))
1923 (leaf-source-name (ref-leaf use))))
1924 (ftype (and (info :function :info name) ; only use the FTYPE if
1925 (info :function :type name)))) ; NAME was DEFKNOWN
1926 (unless (or (node-tail-p last)
1927 (policy last (zerop safety))
1928 (and (fun-type-p ftype)
1929 (eq *empty-type* (fun-type-returns ftype))))
1930 (vop nil-fun-returned-error last 2block
1932 (emit-constant name)
1933 (multiple-value-bind (tn named)
1934 (fun-lvar-tn last 2block fun)
1937 ((not (eq (ir2-block-next 2block) (block-info target)))
1938 (vop branch last 2block (block-label target)))
1940 (register-drop-thru target))))))
1944 ;;; Convert the code in a block into VOPs.
1945 (defun ir2-convert-block (block)
1946 (declare (type cblock block))
1947 (let ((2block (block-info block)))
1948 (do-nodes (node lvar block)
1952 (let ((2lvar (lvar-info lvar)))
1953 ;; function REF in a local call is not annotated
1954 (when (and 2lvar (not (eq (ir2-lvar-kind 2lvar) :delayed)))
1955 (ir2-convert-ref node 2block)))))
1957 (let ((kind (basic-combination-kind node)))
1960 (ir2-convert-local-call node 2block))
1962 (ir2-convert-full-call node 2block))
1964 (let* ((info (basic-combination-fun-info node))
1965 (fun (fun-info-ir2-convert info)))
1967 (funcall fun node 2block))
1968 ((eq (basic-combination-info node) :full)
1969 (ir2-convert-full-call node 2block))
1971 (ir2-convert-template node 2block))))))))
1973 (when (lvar-info (if-test node))
1974 (ir2-convert-if node 2block)))
1976 (let ((fun (bind-lambda node)))
1977 (when (eq (lambda-home fun) fun)
1978 (ir2-convert-bind node 2block))))
1980 (ir2-convert-return node 2block))
1982 (ir2-convert-set node 2block))
1984 (ir2-convert-cast node 2block))
1987 ((eq (basic-combination-kind node) :local)
1988 (ir2-convert-mv-bind node 2block))
1989 ((eq (lvar-fun-name (basic-combination-fun node))
1991 (ir2-convert-throw node 2block))
1993 (ir2-convert-mv-call node 2block))))
1995 (when (exit-entry node)
1996 (ir2-convert-exit node 2block)))
1998 (ir2-convert-entry node 2block)))))
2000 (finish-ir2-block block)