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 ;;; If there is any CHECK-xxx template for TYPE, then return it,
25 ;;; otherwise return NIL.
26 (defun type-check-template (type)
27 (declare (type ctype type
))
28 (multiple-value-bind (check-ptype exact
) (primitive-type type
)
30 (primitive-type-check check-ptype
)
31 (let ((name (hairy-type-check-template-name type
)))
33 (template-or-lose name
)
36 ;;; Emit code in BLOCK to check that VALUE is of the specified TYPE,
37 ;;; yielding the checked result in RESULT. VALUE and result may be of
38 ;;; any primitive type. There must be CHECK-xxx VOP for TYPE. Any
39 ;;; other type checks should have been converted to an explicit type
41 (defun emit-type-check (node block value result type
)
42 (declare (type tn value result
) (type node node
) (type ir2-block block
)
44 (emit-move-template node block
(type-check-template type
) value result
)
47 ;;; Allocate an indirect value cell. Maybe do some clever stack
48 ;;; allocation someday.
50 ;;; FIXME: DO-MAKE-VALUE-CELL is a bad name, since it doesn't make
51 ;;; clear what's the distinction between it and the MAKE-VALUE-CELL
52 ;;; VOP, and since the DO- further connotes iteration, which has
53 ;;; nothing to do with this. Clearer, more systematic names, anyone?
54 (defevent make-value-cell-event
"Allocate heap value cell for lexical var.")
55 (defun do-make-value-cell (node block value res
)
56 (event make-value-cell-event node
)
57 (vop make-value-cell node block value res
))
61 ;;; Return the TN that holds the value of THING in the environment ENV.
62 (declaim (ftype (function ((or nlx-info lambda-var
) physenv
) tn
)
64 (defun find-in-physenv (thing physenv
)
65 (or (cdr (assoc thing
(ir2-physenv-closure (physenv-info physenv
))))
68 ;; I think that a failure of this assertion means that we're
69 ;; trying to access a variable which was improperly closed
70 ;; over. The PHYSENV describes a physical environment. Every
71 ;; variable that a form refers to should either be in its
72 ;; physical environment directly, or grabbed from a
73 ;; surrounding physical environment when it was closed over.
74 ;; The ASSOC expression above finds closed-over variables, so
75 ;; if we fell through the ASSOC expression, it wasn't closed
76 ;; over. Therefore, it must be in our physical environment
77 ;; directly. If instead it is in some other physical
78 ;; environment, then it's bogus for us to reference it here
79 ;; without it being closed over. -- WHN 2001-09-29
80 (aver (eq physenv
(lambda-physenv (lambda-var-home thing
))))
83 (aver (eq physenv
(block-physenv (nlx-info-target thing
))))
84 (ir2-nlx-info-home (nlx-info-info thing
))))
85 (bug "~@<~2I~_~S ~_not found in ~_~S~:>" thing physenv
)))
87 ;;; If LEAF already has a constant TN, return that, otherwise make a
89 (defun constant-tn (leaf)
90 (declare (type constant leaf
))
92 (setf (leaf-info leaf
)
93 (make-constant-tn leaf
))))
95 ;;; Return a TN that represents the value of LEAF, or NIL if LEAF
96 ;;; isn't directly represented by a TN. ENV is the environment that
97 ;;; the reference is done in.
98 (defun leaf-tn (leaf env
)
99 (declare (type leaf leaf
) (type physenv env
))
102 (unless (lambda-var-indirect leaf
)
103 (find-in-physenv leaf env
)))
104 (constant (constant-tn leaf
))
107 ;;; This is used to conveniently get a handle on a constant TN during
108 ;;; IR2 conversion. It returns a constant TN representing the Lisp
110 (defun emit-constant (value)
111 (constant-tn (find-constant value
)))
113 ;;; Convert a REF node. The reference must not be delayed.
114 (defun ir2-convert-ref (node block
)
115 (declare (type ref node
) (type ir2-block block
))
116 (let* ((cont (node-cont node
))
117 (leaf (ref-leaf node
))
118 (locs (continuation-result-tns
119 cont
(list (primitive-type (leaf-type leaf
)))))
123 (let ((tn (find-in-physenv leaf
(node-physenv node
))))
124 (if (lambda-var-indirect leaf
)
125 (vop value-cell-ref node block tn res
)
126 (emit-move node block tn res
))))
128 (if (legal-immediate-constant-p leaf
)
129 (emit-move node block
(constant-tn leaf
) res
)
130 (let* ((name (leaf-source-name leaf
))
131 (name-tn (emit-constant name
)))
132 (if (policy node
(zerop safety
))
133 (vop fast-symbol-value node block name-tn res
)
134 (vop symbol-value node block name-tn res
)))))
136 (ir2-convert-closure node block leaf res
))
138 (let ((unsafe (policy node
(zerop safety
)))
139 (name (leaf-source-name leaf
)))
140 (ecase (global-var-kind leaf
)
142 (aver (symbolp name
))
143 (let ((name-tn (emit-constant name
)))
145 (vop fast-symbol-value node block name-tn res
)
146 (vop symbol-value node block name-tn res
))))
148 (let ((fdefn-tn (make-load-time-constant-tn :fdefinition name
)))
150 (vop fdefn-fun node block fdefn-tn res
)
151 (vop safe-fdefn-fun node block fdefn-tn res
))))))))
152 (move-continuation-result node block locs cont
))
155 ;;; some sanity checks for a CLAMBDA passed to IR2-CONVERT-CLOSURE
156 (defun assertions-on-ir2-converted-clambda (clambda)
157 ;; This assertion was sort of an experiment. It would be nice and
158 ;; sane and easier to understand things if it were *always* true,
159 ;; but experimentally I observe that it's only *almost* always
160 ;; true. -- WHN 2001-01-02
162 (aver (eql (lambda-component clambda
)
163 (block-component (ir2-block-block ir2-block
))))
164 ;; Check for some weirdness which came up in bug
167 ;; The MAKE-LOAD-TIME-CONSTANT-TN call above puts an :ENTRY record
168 ;; into the IR2-COMPONENT-CONSTANTS table. The dump-a-COMPONENT
170 ;; * treats every HANDLEless :ENTRY record into a
172 ;; * expects every patch to correspond to an
173 ;; IR2-COMPONENT-ENTRIES record.
174 ;; The IR2-COMPONENT-ENTRIES records are set by ENTRY-ANALYZE
175 ;; walking over COMPONENT-LAMBDAS. Bug 138b arose because there
176 ;; was a HANDLEless :ENTRY record which didn't correspond to an
177 ;; IR2-COMPONENT-ENTRIES record. That problem is hard to debug
178 ;; when it's caught at dump time, so this assertion tries to catch
180 (aver (member clambda
181 (component-lambdas (lambda-component clambda
))))
182 ;; another bug-138-related issue: COMPONENT-NEW-FUNCTIONALS is
183 ;; used as a queue for stuff pending to do in IR1, and now that
184 ;; we're doing IR2 it should've been completely flushed (but
186 (aver (null (component-new-functionals (lambda-component clambda
))))
189 ;;; Emit code to load a function object implementing FUNCTIONAL into
190 ;;; RES. This gets interesting when the referenced function is a
191 ;;; closure: we must make the closure and move the closed-over values
194 ;;; FUNCTIONAL is either a :TOPLEVEL-XEP functional or the XEP lambda
195 ;;; for the called function, since local call analysis converts all
196 ;;; closure references. If a :TOPLEVEL-XEP, we know it is not a
199 ;;; If a closed-over LAMBDA-VAR has no refs (is deleted), then we
200 ;;; don't initialize that slot. This can happen with closures over
201 ;;; top level variables, where optimization of the closure deleted the
202 ;;; variable. Since we committed to the closure format when we
203 ;;; pre-analyzed the top level code, we just leave an empty slot.
204 (defun ir2-convert-closure (ref ir2-block functional res
)
205 (declare (type ref ref
)
206 (type ir2-block ir2-block
)
207 (type functional functional
)
209 (aver (not (eql (functional-kind functional
) :deleted
)))
210 (unless (leaf-info functional
)
211 (setf (leaf-info functional
)
212 (make-entry-info :name
(functional-debug-name functional
))))
213 (let ((entry (make-load-time-constant-tn :entry functional
))
214 (closure (etypecase functional
216 (assertions-on-ir2-converted-clambda functional
)
217 (physenv-closure (get-lambda-physenv functional
)))
219 (aver (eq (functional-kind functional
) :toplevel-xep
))
223 (let ((this-env (node-physenv ref
)))
224 (vop make-closure ref ir2-block entry
(length closure
) res
)
225 (loop for what in closure and n from
0 do
226 (unless (and (lambda-var-p what
)
227 (null (leaf-refs what
)))
228 (vop closure-init ref ir2-block
230 (find-in-physenv what this-env
)
233 (emit-move ref ir2-block entry res
))))
236 ;;; Convert a SET node. If the node's CONT is annotated, then we also
237 ;;; deliver the value to that continuation. If the var is a lexical
238 ;;; variable with no refs, then we don't actually set anything, since
239 ;;; the variable has been deleted.
240 (defun ir2-convert-set (node block
)
241 (declare (type cset node
) (type ir2-block block
))
242 (let* ((cont (node-cont node
))
243 (leaf (set-var node
))
244 (val (continuation-tn node block
(set-value node
)))
245 (locs (if (continuation-info cont
)
246 (continuation-result-tns
247 cont
(list (primitive-type (leaf-type leaf
))))
251 (when (leaf-refs leaf
)
252 (let ((tn (find-in-physenv leaf
(node-physenv node
))))
253 (if (lambda-var-indirect leaf
)
254 (vop value-cell-set node block tn val
)
255 (emit-move node block val tn
)))))
257 (ecase (global-var-kind leaf
)
259 (aver (symbolp (leaf-source-name leaf
)))
260 (vop set node block
(emit-constant (leaf-source-name leaf
)) val
)))))
262 (emit-move node block val
(first locs
))
263 (move-continuation-result node block locs cont
)))
266 ;;;; utilities for receiving fixed values
268 ;;; Return a TN that can be referenced to get the value of CONT. CONT
269 ;;; must be LTN-ANNOTATED either as a delayed leaf ref or as a fixed,
270 ;;; single-value continuation. If a type check is called for, do it.
272 ;;; The primitive-type of the result will always be the same as the
273 ;;; IR2-CONTINUATION-PRIMITIVE-TYPE, ensuring that VOPs are always
274 ;;; called with TNs that satisfy the operand primitive-type
275 ;;; restriction. We may have to make a temporary of the desired type
276 ;;; and move the actual continuation TN into it. This happens when we
277 ;;; delete a type check in unsafe code or when we locally know
278 ;;; something about the type of an argument variable.
279 (defun continuation-tn (node block cont
)
280 (declare (type node node
) (type ir2-block block
) (type continuation cont
))
281 (let* ((2cont (continuation-info cont
))
283 (ecase (ir2-continuation-kind 2cont
)
285 (let ((ref (continuation-use cont
)))
286 (leaf-tn (ref-leaf ref
) (node-physenv ref
))))
288 (aver (= (length (ir2-continuation-locs 2cont
)) 1))
289 (first (ir2-continuation-locs 2cont
)))))
290 (ptype (ir2-continuation-primitive-type 2cont
)))
292 (cond ((and (eq (continuation-type-check cont
) t
)
293 (multiple-value-bind (check types
)
294 (continuation-check-types cont nil
)
295 (aver (eq check
:simple
))
296 ;; If the proven type is a subtype of the possibly
297 ;; weakened type check then it's always true and is
299 (unless (values-subtypep (continuation-proven-type cont
)
301 (let ((temp (make-normal-tn ptype
)))
302 (emit-type-check node block cont-tn temp
305 ((eq (tn-primitive-type cont-tn
) ptype
) cont-tn
)
307 (let ((temp (make-normal-tn ptype
)))
308 (emit-move node block cont-tn temp
)
311 ;;; This is similar to CONTINUATION-TN, but hacks multiple values. We
312 ;;; return continuations holding the values of CONT with PTYPES as
313 ;;; their primitive types. CONT must be annotated for the same number
314 ;;; of fixed values are there are PTYPES.
316 ;;; If the continuation has a type check, check the values into temps
317 ;;; and return the temps. When we have more values than assertions, we
318 ;;; move the extra values with no check.
319 (defun continuation-tns (node block cont ptypes
)
320 (declare (type node node
) (type ir2-block block
)
321 (type continuation cont
) (list ptypes
))
322 (let* ((locs (ir2-continuation-locs (continuation-info cont
)))
323 (nlocs (length locs
)))
324 (aver (= nlocs
(length ptypes
)))
325 (if (eq (continuation-type-check cont
) t
)
326 (multiple-value-bind (check types
) (continuation-check-types cont nil
)
327 (aver (eq check
:simple
))
328 (let ((ntypes (length types
)))
329 (mapcar (lambda (from to-type assertion
)
330 (let ((temp (make-normal-tn to-type
)))
332 (emit-type-check node block from temp assertion
)
333 (emit-move node block from temp
))
337 (append types
(make-list (- nlocs ntypes
)
338 :initial-element nil
))
340 (mapcar (lambda (from to-type
)
341 (if (eq (tn-primitive-type from
) to-type
)
343 (let ((temp (make-normal-tn to-type
)))
344 (emit-move node block from temp
)
349 ;;;; utilities for delivering values to continuations
351 ;;; Return a list of TNs with the specifier TYPES that can be used as
352 ;;; result TNs to evaluate an expression into the continuation CONT.
353 ;;; This is used together with MOVE-CONTINUATION-RESULT to deliver
354 ;;; fixed values to a continuation.
356 ;;; If the continuation isn't annotated (meaning the values are
357 ;;; discarded) or is unknown-values, the then we make temporaries for
358 ;;; each supplied value, providing a place to compute the result in
359 ;;; until we decide what to do with it (if anything.)
361 ;;; If the continuation is fixed-values, and wants the same number of
362 ;;; values as the user wants to deliver, then we just return the
363 ;;; IR2-CONTINUATION-LOCS. Otherwise we make a new list padded as
364 ;;; necessary by discarded TNs. We always return a TN of the specified
365 ;;; type, using the continuation locs only when they are of the
367 (defun continuation-result-tns (cont types
)
368 (declare (type continuation cont
) (type list types
))
369 (let ((2cont (continuation-info cont
)))
371 (mapcar #'make-normal-tn types
)
372 (ecase (ir2-continuation-kind 2cont
)
374 (let* ((locs (ir2-continuation-locs 2cont
))
375 (nlocs (length locs
))
376 (ntypes (length types
)))
377 (if (and (= nlocs ntypes
)
378 (do ((loc locs
(cdr loc
))
379 (type types
(cdr type
)))
381 (unless (eq (tn-primitive-type (car loc
)) (car type
))
384 (mapcar (lambda (loc type
)
385 (if (eq (tn-primitive-type loc
) type
)
387 (make-normal-tn type
)))
390 (mapcar #'make-normal-tn
391 (subseq types nlocs
)))
395 (mapcar #'make-normal-tn types
))))))
397 ;;; Make the first N standard value TNs, returning them in a list.
398 (defun make-standard-value-tns (n)
399 (declare (type unsigned-byte n
))
402 (res (standard-arg-location i
)))
405 ;;; Return a list of TNs wired to the standard value passing
406 ;;; conventions that can be used to receive values according to the
407 ;;; unknown-values convention. This is used with together
408 ;;; MOVE-CONTINUATION-RESULT for delivering unknown values to a fixed
409 ;;; values continuation.
411 ;;; If the continuation isn't annotated, then we treat as 0-values,
412 ;;; returning an empty list of temporaries.
414 ;;; If the continuation is annotated, then it must be :FIXED.
415 (defun standard-result-tns (cont)
416 (declare (type continuation cont
))
417 (let ((2cont (continuation-info cont
)))
419 (ecase (ir2-continuation-kind 2cont
)
421 (make-standard-value-tns (length (ir2-continuation-locs 2cont
)))))
424 ;;; Just move each SRC TN into the corresponding DEST TN, defaulting
425 ;;; any unsupplied source values to NIL. We let EMIT-MOVE worry about
426 ;;; doing the appropriate coercions.
427 (defun move-results-coerced (node block src dest
)
428 (declare (type node node
) (type ir2-block block
) (list src dest
))
429 (let ((nsrc (length src
))
430 (ndest (length dest
)))
431 (mapc (lambda (from to
)
433 (emit-move node block from to
)))
435 (append src
(make-list (- ndest nsrc
)
436 :initial-element
(emit-constant nil
)))
441 ;;; If necessary, emit coercion code needed to deliver the RESULTS to
442 ;;; the specified continuation. NODE and BLOCK provide context for
443 ;;; emitting code. Although usually obtained from STANDARD-RESULT-TNs
444 ;;; or CONTINUATION-RESULT-TNs, RESULTS my be a list of any type or
447 ;;; If the continuation is fixed values, then move the results into
448 ;;; the continuation locations. If the continuation is unknown values,
449 ;;; then do the moves into the standard value locations, and use
450 ;;; PUSH-VALUES to put the values on the stack.
451 (defun move-continuation-result (node block results cont
)
452 (declare (type node node
) (type ir2-block block
)
453 (list results
) (type continuation cont
))
454 (let* ((2cont (continuation-info cont
)))
456 (ecase (ir2-continuation-kind 2cont
)
458 (let ((locs (ir2-continuation-locs 2cont
)))
459 (unless (eq locs results
)
460 (move-results-coerced node block results locs
))))
462 (let* ((nvals (length results
))
463 (locs (make-standard-value-tns nvals
)))
464 (move-results-coerced node block results locs
)
465 (vop* push-values node block
466 ((reference-tn-list locs nil
))
467 ((reference-tn-list (ir2-continuation-locs 2cont
) t
))
471 ;;;; template conversion
473 ;;; Build a TN-REFS list that represents access to the values of the
474 ;;; specified list of continuations ARGS for TEMPLATE. Any :CONSTANT
475 ;;; arguments are returned in the second value as a list rather than
476 ;;; being accessed as a normal argument. NODE and BLOCK provide the
477 ;;; context for emitting any necessary type-checking code.
478 (defun reference-args (node block args template
)
479 (declare (type node node
) (type ir2-block block
) (list args
)
480 (type template template
))
481 (collect ((info-args))
484 (do ((args args
(cdr args
))
485 (types (template-arg-types template
) (cdr types
)))
487 (let ((type (first types
))
489 (if (and (consp type
) (eq (car type
) ':constant
))
490 (info-args (continuation-value arg
))
491 (let ((ref (reference-tn (continuation-tn node block arg
) nil
)))
493 (setf (tn-ref-across last
) ref
)
497 (values (the (or tn-ref null
) first
) (info-args)))))
499 ;;; Convert a conditional template. We try to exploit any
500 ;;; drop-through, but emit an unconditional branch afterward if we
501 ;;; fail. NOT-P is true if the sense of the TEMPLATE's test should be
503 (defun ir2-convert-conditional (node block template args info-args if not-p
)
504 (declare (type node node
) (type ir2-block block
)
505 (type template template
) (type (or tn-ref null
) args
)
506 (list info-args
) (type cif if
) (type boolean not-p
))
507 (aver (= (template-info-arg-count template
) (+ (length info-args
) 2)))
508 (let ((consequent (if-consequent if
))
509 (alternative (if-alternative if
)))
510 (cond ((drop-thru-p if consequent
)
511 (emit-template node block template args nil
512 (list* (block-label alternative
) (not not-p
)
515 (emit-template node block template args nil
516 (list* (block-label consequent
) not-p info-args
))
517 (unless (drop-thru-p if alternative
)
518 (vop branch node block
(block-label alternative
)))))))
520 ;;; Convert an IF that isn't the DEST of a conditional template.
521 (defun ir2-convert-if (node block
)
522 (declare (type ir2-block block
) (type cif node
))
523 (let* ((test (if-test node
))
524 (test-ref (reference-tn (continuation-tn node block test
) nil
))
525 (nil-ref (reference-tn (emit-constant nil
) nil
)))
526 (setf (tn-ref-across test-ref
) nil-ref
)
527 (ir2-convert-conditional node block
(template-or-lose 'if-eq
)
528 test-ref
() node t
)))
530 ;;; Return a list of primitive-types that we can pass to
531 ;;; CONTINUATION-RESULT-TNS describing the result types we want for a
532 ;;; template call. We duplicate here the determination of output type
533 ;;; that was done in initially selecting the template, so we know that
534 ;;; the types we find are allowed by the template output type
536 (defun find-template-result-types (call cont template rtypes
)
537 (declare (type combination call
) (type continuation cont
)
538 (type template template
) (list rtypes
))
539 (let* ((dtype (node-derived-type call
))
540 (type (if (and (or (eq (template-ltn-policy template
) :safe
)
541 (policy call
(= safety
0)))
542 (continuation-type-check cont
))
543 (values-type-intersection
545 (continuation-asserted-type cont
))
547 (types (mapcar #'primitive-type
548 (if (values-type-p type
)
549 (append (values-type-required type
)
550 (values-type-optional type
))
552 (let ((nvals (length rtypes
))
553 (ntypes (length types
)))
554 (cond ((< ntypes nvals
)
556 (make-list (- nvals ntypes
)
557 :initial-element
*backend-t-primitive-type
*)))
559 (subseq types
0 nvals
))
563 ;;; Return a list of TNs usable in a CALL to TEMPLATE delivering
564 ;;; values to CONT. As an efficiency hack, we pick off the common case
565 ;;; where the continuation is fixed values and has locations that
566 ;;; satisfy the result restrictions. This can fail when there is a
567 ;;; type check or a values count mismatch.
568 (defun make-template-result-tns (call cont template rtypes
)
569 (declare (type combination call
) (type continuation cont
)
570 (type template template
) (list rtypes
))
571 (let ((2cont (continuation-info cont
)))
572 (if (and 2cont
(eq (ir2-continuation-kind 2cont
) :fixed
))
573 (let ((locs (ir2-continuation-locs 2cont
)))
574 (if (and (= (length rtypes
) (length locs
))
575 (do ((loc locs
(cdr loc
))
576 (rtype rtypes
(cdr rtype
)))
578 (unless (operand-restriction-ok
580 (tn-primitive-type (car loc
))
584 (continuation-result-tns
586 (find-template-result-types call cont template rtypes
))))
587 (continuation-result-tns
589 (find-template-result-types call cont template rtypes
)))))
591 ;;; Get the operands into TNs, make TN-REFs for them, and then call
592 ;;; the template emit function.
593 (defun ir2-convert-template (call block
)
594 (declare (type combination call
) (type ir2-block block
))
595 (let* ((template (combination-info call
))
596 (cont (node-cont call
))
597 (rtypes (template-result-types template
)))
598 (multiple-value-bind (args info-args
)
599 (reference-args call block
(combination-args call
) template
)
600 (aver (not (template-more-results-type template
)))
601 (if (eq rtypes
:conditional
)
602 (ir2-convert-conditional call block template args info-args
603 (continuation-dest cont
) nil
)
604 (let* ((results (make-template-result-tns call cont template rtypes
))
605 (r-refs (reference-tn-list results t
)))
606 (aver (= (length info-args
)
607 (template-info-arg-count template
)))
609 (emit-template call block template args r-refs info-args
)
610 (emit-template call block template args r-refs
))
611 (move-continuation-result call block results cont
)))))
614 ;;; We don't have to do much because operand count checking is done by
615 ;;; IR1 conversion. The only difference between this and the function
616 ;;; case of IR2-CONVERT-TEMPLATE is that there can be codegen-info
618 (defoptimizer (%%primitive ir2-convert
) ((template info
&rest args
) call block
)
619 (let* ((template (continuation-value template
))
620 (info (continuation-value info
))
621 (cont (node-cont call
))
622 (rtypes (template-result-types template
))
623 (results (make-template-result-tns call cont template rtypes
))
624 (r-refs (reference-tn-list results t
)))
625 (multiple-value-bind (args info-args
)
626 (reference-args call block
(cddr (combination-args call
)) template
)
627 (aver (not (template-more-results-type template
)))
628 (aver (not (eq rtypes
:conditional
)))
629 (aver (null info-args
))
632 (emit-template call block template args r-refs info
)
633 (emit-template call block template args r-refs
))
635 (move-continuation-result call block results cont
)))
640 ;;; Convert a LET by moving the argument values into the variables.
641 ;;; Since a LET doesn't have any passing locations, we move the
642 ;;; arguments directly into the variables. We must also allocate any
643 ;;; indirect value cells, since there is no function prologue to do
645 (defun ir2-convert-let (node block fun
)
646 (declare (type combination node
) (type ir2-block block
) (type clambda fun
))
647 (mapc (lambda (var arg
)
649 (let ((src (continuation-tn node block arg
))
650 (dest (leaf-info var
)))
651 (if (lambda-var-indirect var
)
652 (do-make-value-cell node block src dest
)
653 (emit-move node block src dest
)))))
654 (lambda-vars fun
) (basic-combination-args node
))
657 ;;; Emit any necessary moves into assignment temps for a local call to
658 ;;; FUN. We return two lists of TNs: TNs holding the actual argument
659 ;;; values, and (possibly EQ) TNs that are the actual destination of
660 ;;; the arguments. When necessary, we allocate temporaries for
661 ;;; arguments to preserve parallel assignment semantics. These lists
662 ;;; exclude unused arguments and include implicit environment
663 ;;; arguments, i.e. they exactly correspond to the arguments passed.
665 ;;; OLD-FP is the TN currently holding the value we want to pass as
666 ;;; OLD-FP. If null, then the call is to the same environment (an
667 ;;; :ASSIGNMENT), so we only move the arguments, and leave the
668 ;;; environment alone.
669 (defun emit-psetq-moves (node block fun old-fp
)
670 (declare (type combination node
) (type ir2-block block
) (type clambda fun
)
671 (type (or tn null
) old-fp
))
672 (let ((actuals (mapcar (lambda (x)
674 (continuation-tn node block x
)))
675 (combination-args node
))))
678 (dolist (var (lambda-vars fun
))
679 (let ((actual (pop actuals
))
680 (loc (leaf-info var
)))
683 ((lambda-var-indirect var
)
685 (make-normal-tn *backend-t-primitive-type
*)))
686 (do-make-value-cell node block actual temp
)
688 ((member actual
(locs))
689 (let ((temp (make-normal-tn (tn-primitive-type loc
))))
690 (emit-move node block actual temp
)
697 (let ((this-1env (node-physenv node
))
698 (called-env (physenv-info (lambda-physenv fun
))))
699 (dolist (thing (ir2-physenv-closure called-env
))
700 (temps (find-in-physenv (car thing
) this-1env
))
703 (locs (ir2-physenv-old-fp called-env
))))
705 (values (temps) (locs)))))
707 ;;; A tail-recursive local call is done by emitting moves of stuff
708 ;;; into the appropriate passing locations. After setting up the args
709 ;;; and environment, we just move our return-pc into the called
710 ;;; function's passing location.
711 (defun ir2-convert-tail-local-call (node block fun
)
712 (declare (type combination node
) (type ir2-block block
) (type clambda fun
))
713 (let ((this-env (physenv-info (node-physenv node
))))
714 (multiple-value-bind (temps locs
)
715 (emit-psetq-moves node block fun
(ir2-physenv-old-fp this-env
))
717 (mapc (lambda (temp loc
)
718 (emit-move node block temp loc
))
721 (emit-move node block
722 (ir2-physenv-return-pc this-env
)
723 (ir2-physenv-return-pc-pass
725 (lambda-physenv fun
)))))
729 ;;; Convert an :ASSIGNMENT call. This is just like a tail local call,
730 ;;; except that the caller and callee environment are the same, so we
731 ;;; don't need to mess with the environment locations, return PC, etc.
732 (defun ir2-convert-assignment (node block fun
)
733 (declare (type combination node
) (type ir2-block block
) (type clambda fun
))
734 (multiple-value-bind (temps locs
) (emit-psetq-moves node block fun nil
)
736 (mapc (lambda (temp loc
)
737 (emit-move node block temp loc
))
741 ;;; Do stuff to set up the arguments to a non-tail local call
742 ;;; (including implicit environment args.) We allocate a frame
743 ;;; (returning the FP and NFP), and also compute the TN-REFS list for
744 ;;; the values to pass and the list of passing location TNs.
745 (defun ir2-convert-local-call-args (node block fun
)
746 (declare (type combination node
) (type ir2-block block
) (type clambda fun
))
747 (let ((fp (make-stack-pointer-tn))
748 (nfp (make-number-stack-pointer-tn))
749 (old-fp (make-stack-pointer-tn)))
750 (multiple-value-bind (temps locs
)
751 (emit-psetq-moves node block fun old-fp
)
752 (vop current-fp node block old-fp
)
753 (vop allocate-frame node block
754 (physenv-info (lambda-physenv fun
))
756 (values fp nfp temps
(mapcar #'make-alias-tn locs
)))))
758 ;;; Handle a non-TR known-values local call. We emit the call, then
759 ;;; move the results to the continuation's destination.
760 (defun ir2-convert-local-known-call (node block fun returns cont start
)
761 (declare (type node node
) (type ir2-block block
) (type clambda fun
)
762 (type return-info returns
) (type continuation cont
)
764 (multiple-value-bind (fp nfp temps arg-locs
)
765 (ir2-convert-local-call-args node block fun
)
766 (let ((locs (return-info-locations returns
)))
767 (vop* known-call-local node block
768 (fp nfp
(reference-tn-list temps nil
))
769 ((reference-tn-list locs t
))
770 arg-locs
(physenv-info (lambda-physenv fun
)) start
)
771 (move-continuation-result node block locs cont
)))
774 ;;; Handle a non-TR unknown-values local call. We do different things
775 ;;; depending on what kind of values the continuation wants.
777 ;;; If CONT is :UNKNOWN, then we use the "multiple-" variant, directly
778 ;;; specifying the continuation's LOCS as the VOP results so that we
779 ;;; don't have to do anything after the call.
781 ;;; Otherwise, we use STANDARD-RESULT-TNS to get wired result TNs, and
782 ;;; then call MOVE-CONTINUATION-RESULT to do any necessary type checks
784 (defun ir2-convert-local-unknown-call (node block fun cont start
)
785 (declare (type node node
) (type ir2-block block
) (type clambda fun
)
786 (type continuation cont
) (type label start
))
787 (multiple-value-bind (fp nfp temps arg-locs
)
788 (ir2-convert-local-call-args node block fun
)
789 (let ((2cont (continuation-info cont
))
790 (env (physenv-info (lambda-physenv fun
)))
791 (temp-refs (reference-tn-list temps nil
)))
792 (if (and 2cont
(eq (ir2-continuation-kind 2cont
) :unknown
))
793 (vop* multiple-call-local node block
(fp nfp temp-refs
)
794 ((reference-tn-list (ir2-continuation-locs 2cont
) t
))
796 (let ((locs (standard-result-tns cont
)))
797 (vop* call-local node block
799 ((reference-tn-list locs t
))
800 arg-locs env start
(length locs
))
801 (move-continuation-result node block locs cont
)))))
804 ;;; Dispatch to the appropriate function, depending on whether we have
805 ;;; a let, tail or normal call. If the function doesn't return, call
806 ;;; it using the unknown-value convention. We could compile it as a
807 ;;; tail call, but that might seem confusing in the debugger.
808 (defun ir2-convert-local-call (node block
)
809 (declare (type combination node
) (type ir2-block block
))
810 (let* ((fun (ref-leaf (continuation-use (basic-combination-fun node
))))
811 (kind (functional-kind fun
)))
812 (cond ((eq kind
:let
)
813 (ir2-convert-let node block fun
))
814 ((eq kind
:assignment
)
815 (ir2-convert-assignment node block fun
))
817 (ir2-convert-tail-local-call node block fun
))
819 (let ((start (block-label (lambda-block fun
)))
820 (returns (tail-set-info (lambda-tail-set fun
)))
821 (cont (node-cont node
)))
823 (return-info-kind returns
)
826 (ir2-convert-local-unknown-call node block fun cont start
))
828 (ir2-convert-local-known-call node block fun returns
834 ;;; Given a function continuation FUN, return (VALUES TN-TO-CALL
835 ;;; NAMED-P), where TN-TO-CALL is a TN holding the thing that we call
836 ;;; NAMED-P is true if the thing is named (false if it is a function).
838 ;;; There are two interesting non-named cases:
839 ;;; -- We know it's a function. No check needed: return the
840 ;;; continuation LOC.
841 ;;; -- We don't know what it is.
842 (defun fun-continuation-tn (node block cont
)
843 (declare (type continuation cont
))
844 (let ((2cont (continuation-info cont
)))
845 (if (eq (ir2-continuation-kind 2cont
) :delayed
)
846 (let ((name (continuation-fun-name cont t
)))
848 (values (make-load-time-constant-tn :fdefinition name
) t
))
849 (let* ((locs (ir2-continuation-locs 2cont
))
851 (check (continuation-type-check cont
))
852 (function-ptype (primitive-type-or-lose 'function
)))
853 (aver (and (eq (ir2-continuation-kind 2cont
) :fixed
)
854 (= (length locs
) 1)))
855 (cond ((eq (tn-primitive-type loc
) function-ptype
)
856 (aver (not (eq check t
)))
859 (let ((temp (make-normal-tn function-ptype
)))
860 (aver (and (eq (ir2-continuation-primitive-type 2cont
)
863 (emit-type-check node block loc temp
864 (specifier-type 'function
))
865 (values temp nil
))))))))
867 ;;; Set up the args to NODE in the current frame, and return a TN-REF
868 ;;; list for the passing locations.
869 (defun move-tail-full-call-args (node block
)
870 (declare (type combination node
) (type ir2-block block
))
871 (let ((args (basic-combination-args node
))
874 (dotimes (num (length args
))
875 (let ((loc (standard-arg-location num
)))
876 (emit-move node block
(continuation-tn node block
(elt args num
)) loc
)
877 (let ((ref (reference-tn loc nil
)))
879 (setf (tn-ref-across last
) ref
)
884 ;;; Move the arguments into the passing locations and do a (possibly
885 ;;; named) tail call.
886 (defun ir2-convert-tail-full-call (node block
)
887 (declare (type combination node
) (type ir2-block block
))
888 (let* ((env (physenv-info (node-physenv node
)))
889 (args (basic-combination-args node
))
890 (nargs (length args
))
891 (pass-refs (move-tail-full-call-args node block
))
892 (old-fp (ir2-physenv-old-fp env
))
893 (return-pc (ir2-physenv-return-pc env
)))
895 (multiple-value-bind (fun-tn named
)
896 (fun-continuation-tn node block
(basic-combination-fun node
))
898 (vop* tail-call-named node block
899 (fun-tn old-fp return-pc pass-refs
)
902 (vop* tail-call node block
903 (fun-tn old-fp return-pc pass-refs
)
909 ;;; like IR2-CONVERT-LOCAL-CALL-ARGS, only different
910 (defun ir2-convert-full-call-args (node block
)
911 (declare (type combination node
) (type ir2-block block
))
912 (let* ((args (basic-combination-args node
))
913 (fp (make-stack-pointer-tn))
914 (nargs (length args
)))
915 (vop allocate-full-call-frame node block nargs fp
)
920 (locs (standard-arg-location num
))
921 (let ((ref (reference-tn (continuation-tn node block
(elt args num
))
924 (setf (tn-ref-across last
) ref
)
928 (values fp first
(locs) nargs
)))))
930 ;;; Do full call when a fixed number of values are desired. We make
931 ;;; STANDARD-RESULT-TNS for our continuation, then deliver the result
932 ;;; using MOVE-CONTINUATION-RESULT. We do named or normal call, as
934 (defun ir2-convert-fixed-full-call (node block
)
935 (declare (type combination node
) (type ir2-block block
))
936 (multiple-value-bind (fp args arg-locs nargs
)
937 (ir2-convert-full-call-args node block
)
938 (let* ((cont (node-cont node
))
939 (locs (standard-result-tns cont
))
940 (loc-refs (reference-tn-list locs t
))
941 (nvals (length locs
)))
942 (multiple-value-bind (fun-tn named
)
943 (fun-continuation-tn node block
(basic-combination-fun node
))
945 (vop* call-named node block
(fp fun-tn args
) (loc-refs)
946 arg-locs nargs nvals
)
947 (vop* call node block
(fp fun-tn args
) (loc-refs)
948 arg-locs nargs nvals
))
949 (move-continuation-result node block locs cont
))))
952 ;;; Do full call when unknown values are desired.
953 (defun ir2-convert-multiple-full-call (node block
)
954 (declare (type combination node
) (type ir2-block block
))
955 (multiple-value-bind (fp args arg-locs nargs
)
956 (ir2-convert-full-call-args node block
)
957 (let* ((cont (node-cont node
))
958 (locs (ir2-continuation-locs (continuation-info cont
)))
959 (loc-refs (reference-tn-list locs t
)))
960 (multiple-value-bind (fun-tn named
)
961 (fun-continuation-tn node block
(basic-combination-fun node
))
963 (vop* multiple-call-named node block
(fp fun-tn args
) (loc-refs)
965 (vop* multiple-call node block
(fp fun-tn args
) (loc-refs)
969 ;;; stuff to check in PONDER-FULL-CALL
971 ;;; There are some things which are intended always to be optimized
972 ;;; away by DEFTRANSFORMs and such, and so never compiled into full
973 ;;; calls. This has been a source of bugs so many times that it seems
974 ;;; worth listing some of them here so that we can check the list
975 ;;; whenever we compile a full call.
977 ;;; FIXME: It might be better to represent this property by setting a
978 ;;; flag in DEFKNOWN, instead of representing it by membership in this
980 (defvar *always-optimized-away
*
981 '(;; This should always be DEFTRANSFORMed away, but wasn't in a bug
982 ;; reported to cmucl-imp 2000-06-20.
984 ;; These should always turn into VOPs, but wasn't in a bug which
985 ;; appeared when LTN-POLICY stuff was being tweaked in
986 ;; sbcl-0.6.9.16. in sbcl-0.6.0
990 ;;; more stuff to check in PONDER-FULL-CALL
992 ;;; These came in handy when troubleshooting cold boot after making
993 ;;; major changes in the package structure: various transforms and
994 ;;; VOPs and stuff got attached to the wrong symbol, so that
995 ;;; references to the right symbol were bogusly translated as full
996 ;;; calls instead of primitives, sending the system off into infinite
997 ;;; space. Having a report on all full calls generated makes it easier
998 ;;; to figure out what form caused the problem this time.
999 #!+sb-show
(defvar *show-full-called-fnames-p
* nil
)
1000 #!+sb-show
(defvar *full-called-fnames
* (make-hash-table :test
'equal
))
1002 ;;; Do some checks (and store some notes relevant for future checks)
1004 ;;; * Is this a full call to something we have reason to know should
1005 ;;; never be full called? (Except as of sbcl-0.7.18 or so, we no
1006 ;;; longer try to ensure this behavior when *FAILURE-P* has already
1008 ;;; * Is this a full call to (SETF FOO) which might conflict with
1009 ;;; a DEFSETF or some such thing elsewhere in the program?
1010 (defun ponder-full-call (node)
1011 (let* ((cont (basic-combination-fun node
))
1012 (fname (continuation-fun-name cont t
)))
1013 (declare (type (or symbol cons
) fname
))
1015 #!+sb-show
(unless (gethash fname
*full-called-fnames
*)
1016 (setf (gethash fname
*full-called-fnames
*) t
))
1017 #!+sb-show
(when *show-full-called-fnames-p
*
1018 (/show
"converting full call to named function" fname
)
1019 (/show
(basic-combination-args node
))
1020 (/show
(policy node speed
) (policy node safety
))
1021 (/show
(policy node compilation-speed
))
1022 (let ((arg-types (mapcar (lambda (maybe-continuation)
1023 (when maybe-continuation
1026 maybe-continuation
))))
1027 (basic-combination-args node
))))
1030 ;; When illegal code is compiled, all sorts of perverse paths
1031 ;; through the compiler can be taken, and it's much harder -- and
1032 ;; probably pointless -- to guarantee that always-optimized-away
1033 ;; functions are actually optimized away. Thus, we skip the check
1036 (when (memq fname
*always-optimized-away
*)
1037 (/show
(policy node speed
) (policy node safety
))
1038 (/show
(policy node compilation-speed
))
1039 (bug "full call to ~S" fname
)))
1042 (aver (legal-fun-name-p fname
))
1043 (destructuring-bind (setfoid &rest stem
) fname
1044 (when (eq setfoid
'setf
)
1045 (setf (gethash (car stem
) *setf-assumed-fboundp
*) t
))))))
1047 ;;; If the call is in a tail recursive position and the return
1048 ;;; convention is standard, then do a tail full call. If one or fewer
1049 ;;; values are desired, then use a single-value call, otherwise use a
1050 ;;; multiple-values call.
1051 (defun ir2-convert-full-call (node block
)
1052 (declare (type combination node
) (type ir2-block block
))
1053 (ponder-full-call node
)
1054 (let ((2cont (continuation-info (node-cont node
))))
1055 (cond ((node-tail-p node
)
1056 (ir2-convert-tail-full-call node block
))
1058 (eq (ir2-continuation-kind 2cont
) :unknown
))
1059 (ir2-convert-multiple-full-call node block
))
1061 (ir2-convert-fixed-full-call node block
))))
1064 ;;;; entering functions
1066 ;;; Do all the stuff that needs to be done on XEP entry:
1067 ;;; -- Create frame.
1068 ;;; -- Copy any more arg.
1069 ;;; -- Set up the environment, accessing any closure variables.
1070 ;;; -- Move args from the standard passing locations to their internal
1072 (defun init-xep-environment (node block fun
)
1073 (declare (type bind node
) (type ir2-block block
) (type clambda fun
))
1074 (let ((start-label (entry-info-offset (leaf-info fun
)))
1075 (env (physenv-info (node-physenv node
))))
1076 (let ((ef (functional-entry-fun fun
)))
1077 (cond ((and (optional-dispatch-p ef
) (optional-dispatch-more-entry ef
))
1078 ;; Special case the xep-allocate-frame + copy-more-arg case.
1079 (vop xep-allocate-frame node block start-label t
)
1080 (vop copy-more-arg node block
(optional-dispatch-max-args ef
)))
1082 ;; No more args, so normal entry.
1083 (vop xep-allocate-frame node block start-label nil
)))
1084 (if (ir2-physenv-closure env
)
1085 (let ((closure (make-normal-tn *backend-t-primitive-type
*)))
1086 (vop setup-closure-environment node block start-label closure
)
1087 (when (getf (functional-plist ef
) :fin-function
)
1088 (vop funcallable-instance-lexenv node block closure closure
))
1090 (dolist (loc (ir2-physenv-closure env
))
1091 (vop closure-ref node block closure
(incf n
) (cdr loc
)))))
1092 (vop setup-environment node block start-label
)))
1094 (unless (eq (functional-kind fun
) :toplevel
)
1095 (let ((vars (lambda-vars fun
))
1097 (when (leaf-refs (first vars
))
1098 (emit-move node block
(make-arg-count-location)
1099 (leaf-info (first vars
))))
1100 (dolist (arg (rest vars
))
1101 (when (leaf-refs arg
)
1102 (let ((pass (standard-arg-location n
))
1103 (home (leaf-info arg
)))
1104 (if (lambda-var-indirect arg
)
1105 (do-make-value-cell node block pass home
)
1106 (emit-move node block pass home
))))
1109 (emit-move node block
(make-old-fp-passing-location t
)
1110 (ir2-physenv-old-fp env
)))
1114 ;;; Emit function prolog code. This is only called on bind nodes for
1115 ;;; functions that allocate environments. All semantics of let calls
1116 ;;; are handled by IR2-CONVERT-LET.
1118 ;;; If not an XEP, all we do is move the return PC from its passing
1119 ;;; location, since in a local call, the caller allocates the frame
1120 ;;; and sets up the arguments.
1121 (defun ir2-convert-bind (node block
)
1122 (declare (type bind node
) (type ir2-block block
))
1123 (let* ((fun (bind-lambda node
))
1124 (env (physenv-info (lambda-physenv fun
))))
1125 (aver (member (functional-kind fun
)
1126 '(nil :external
:optional
:toplevel
:cleanup
)))
1129 (init-xep-environment node block fun
)
1131 (when *collect-dynamic-statistics
*
1132 (vop count-me node block
*dynamic-counts-tn
*
1133 (block-number (ir2-block-block block
)))))
1137 (ir2-physenv-return-pc-pass env
)
1138 (ir2-physenv-return-pc env
))
1140 (let ((lab (gen-label)))
1141 (setf (ir2-physenv-environment-start env
) lab
)
1142 (vop note-environment-start node block lab
)))
1146 ;;;; function return
1148 ;;; Do stuff to return from a function with the specified values and
1149 ;;; convention. If the return convention is :FIXED and we aren't
1150 ;;; returning from an XEP, then we do a known return (letting
1151 ;;; representation selection insert the correct move-arg VOPs.)
1152 ;;; Otherwise, we use the unknown-values convention. If there is a
1153 ;;; fixed number of return values, then use RETURN, otherwise use
1154 ;;; RETURN-MULTIPLE.
1155 (defun ir2-convert-return (node block
)
1156 (declare (type creturn node
) (type ir2-block block
))
1157 (let* ((cont (return-result node
))
1158 (2cont (continuation-info cont
))
1159 (cont-kind (ir2-continuation-kind 2cont
))
1160 (fun (return-lambda node
))
1161 (env (physenv-info (lambda-physenv fun
)))
1162 (old-fp (ir2-physenv-old-fp env
))
1163 (return-pc (ir2-physenv-return-pc env
))
1164 (returns (tail-set-info (lambda-tail-set fun
))))
1166 ((and (eq (return-info-kind returns
) :fixed
)
1168 (let ((locs (continuation-tns node block cont
1169 (return-info-types returns
))))
1170 (vop* known-return node block
1171 (old-fp return-pc
(reference-tn-list locs nil
))
1173 (return-info-locations returns
))))
1174 ((eq cont-kind
:fixed
)
1175 (let* ((types (mapcar #'tn-primitive-type
(ir2-continuation-locs 2cont
)))
1176 (cont-locs (continuation-tns node block cont types
))
1177 (nvals (length cont-locs
))
1178 (locs (make-standard-value-tns nvals
)))
1179 (mapc (lambda (val loc
)
1180 (emit-move node block val loc
))
1184 (vop return-single node block old-fp return-pc
(car locs
))
1185 (vop* return node block
1186 (old-fp return-pc
(reference-tn-list locs nil
))
1190 (aver (eq cont-kind
:unknown
))
1191 (vop* return-multiple node block
1193 (reference-tn-list (ir2-continuation-locs 2cont
) nil
))
1200 ;;; This is used by the debugger to find the top function on the
1201 ;;; stack. It returns the OLD-FP and RETURN-PC for the current
1202 ;;; function as multiple values.
1203 (defoptimizer (sb!kernel
:%caller-frame-and-pc ir2-convert
) (() node block
)
1204 (let ((ir2-physenv (physenv-info (node-physenv node
))))
1205 (move-continuation-result node block
1206 (list (ir2-physenv-old-fp ir2-physenv
)
1207 (ir2-physenv-return-pc ir2-physenv
))
1210 ;;;; multiple values
1212 ;;; This is almost identical to IR2-CONVERT-LET. Since LTN annotates
1213 ;;; the continuation for the correct number of values (with the
1214 ;;; continuation user responsible for defaulting), we can just pick
1215 ;;; them up from the continuation.
1216 (defun ir2-convert-mv-bind (node block
)
1217 (declare (type mv-combination node
) (type ir2-block block
))
1218 (let* ((cont (first (basic-combination-args node
)))
1219 (fun (ref-leaf (continuation-use (basic-combination-fun node
))))
1220 (vars (lambda-vars fun
)))
1221 (aver (eq (functional-kind fun
) :mv-let
))
1222 (mapc (lambda (src var
)
1223 (when (leaf-refs var
)
1224 (let ((dest (leaf-info var
)))
1225 (if (lambda-var-indirect var
)
1226 (do-make-value-cell node block src dest
)
1227 (emit-move node block src dest
)))))
1228 (continuation-tns node block cont
1230 (primitive-type (leaf-type x
)))
1235 ;;; Emit the appropriate fixed value, unknown value or tail variant of
1236 ;;; CALL-VARIABLE. Note that we only need to pass the values start for
1237 ;;; the first argument: all the other argument continuation TNs are
1238 ;;; ignored. This is because we require all of the values globs to be
1239 ;;; contiguous and on stack top.
1240 (defun ir2-convert-mv-call (node block
)
1241 (declare (type mv-combination node
) (type ir2-block block
))
1242 (aver (basic-combination-args node
))
1243 (let* ((start-cont (continuation-info (first (basic-combination-args node
))))
1244 (start (first (ir2-continuation-locs start-cont
)))
1245 (tails (and (node-tail-p node
)
1246 (lambda-tail-set (node-home-lambda node
))))
1247 (cont (node-cont node
))
1248 (2cont (continuation-info cont
)))
1249 (multiple-value-bind (fun named
)
1250 (fun-continuation-tn node block
(basic-combination-fun node
))
1251 (aver (and (not named
)
1252 (eq (ir2-continuation-kind start-cont
) :unknown
)))
1255 (let ((env (physenv-info (node-physenv node
))))
1256 (vop tail-call-variable node block start fun
1257 (ir2-physenv-old-fp env
)
1258 (ir2-physenv-return-pc env
))))
1260 (eq (ir2-continuation-kind 2cont
) :unknown
))
1261 (vop* multiple-call-variable node block
(start fun nil
)
1262 ((reference-tn-list (ir2-continuation-locs 2cont
) t
))))
1264 (let ((locs (standard-result-tns cont
)))
1265 (vop* call-variable node block
(start fun nil
)
1266 ((reference-tn-list locs t
)) (length locs
))
1267 (move-continuation-result node block locs cont
)))))))
1269 ;;; Reset the stack pointer to the start of the specified
1270 ;;; unknown-values continuation (discarding it and all values globs on
1272 (defoptimizer (%pop-values ir2-convert
) ((continuation) node block
)
1273 (let ((2cont (continuation-info (continuation-value continuation
))))
1274 (aver (eq (ir2-continuation-kind 2cont
) :unknown
))
1275 (vop reset-stack-pointer node block
1276 (first (ir2-continuation-locs 2cont
)))))
1278 ;;; Deliver the values TNs to CONT using MOVE-CONTINUATION-RESULT.
1279 (defoptimizer (values ir2-convert
) ((&rest values
) node block
)
1280 (let ((tns (mapcar (lambda (x)
1281 (continuation-tn node block x
))
1283 (move-continuation-result node block tns
(node-cont node
))))
1285 ;;; In the normal case where unknown values are desired, we use the
1286 ;;; VALUES-LIST VOP. In the relatively unimportant case of VALUES-LIST
1287 ;;; for a fixed number of values, we punt by doing a full call to the
1288 ;;; VALUES-LIST function. This gets the full call VOP to deal with
1289 ;;; defaulting any unsupplied values. It seems unworthwhile to
1290 ;;; optimize this case.
1291 (defoptimizer (values-list ir2-convert
) ((list) node block
)
1292 (let* ((cont (node-cont node
))
1293 (2cont (continuation-info cont
)))
1295 (eq (ir2-continuation-kind 2cont
) :unknown
))
1296 (let ((locs (ir2-continuation-locs 2cont
)))
1297 (vop* values-list node block
1298 ((continuation-tn node block list
) nil
)
1299 ((reference-tn-list locs t
)))))
1300 (t (aver (or (not 2cont
) ; i.e. we want to check the argument
1301 (eq (ir2-continuation-kind 2cont
) :fixed
)))
1302 (ir2-convert-full-call node block
)))))
1304 (defoptimizer (%more-arg-values ir2-convert
) ((context start count
) node block
)
1305 (let* ((cont (node-cont node
))
1306 (2cont (continuation-info cont
)))
1308 (ecase (ir2-continuation-kind 2cont
)
1309 (:fixed
(ir2-convert-full-call node block
))
1311 (let ((locs (ir2-continuation-locs 2cont
)))
1312 (vop* %more-arg-values node block
1313 ((continuation-tn node block context
)
1314 (continuation-tn node block start
)
1315 (continuation-tn node block count
)
1317 ((reference-tn-list locs t
)))))))))
1319 ;;;; special binding
1321 ;;; This is trivial, given our assumption of a shallow-binding
1323 (defoptimizer (%special-bind ir2-convert
) ((var value
) node block
)
1324 (let ((name (leaf-source-name (continuation-value var
))))
1325 (vop bind node block
(continuation-tn node block value
)
1326 (emit-constant name
))))
1327 (defoptimizer (%special-unbind ir2-convert
) ((var) node block
)
1328 (vop unbind node block
))
1330 ;;; ### It's not clear that this really belongs in this file, or
1331 ;;; should really be done this way, but this is the least violation of
1332 ;;; abstraction in the current setup. We don't want to wire
1333 ;;; shallow-binding assumptions into IR1tran.
1334 (def-ir1-translator progv
((vars vals
&body body
) start cont
)
1337 (with-unique-names (bind unbind
)
1338 (once-only ((n-save-bs '(%primitive current-binding-pointer
)))
1341 (labels ((,unbind
(vars)
1342 (declare (optimize (speed 2) (debug 0)))
1344 (%primitive bind nil var
)
1347 (declare (optimize (speed 2) (debug 0)))
1349 ((null vals
) (,unbind vars
))
1353 (,bind
(cdr vars
) (cdr vals
))))))
1354 (,bind
,vars
,vals
))
1357 (%primitive unbind-to-here
,n-save-bs
))))))
1361 ;;; Convert a non-local lexical exit. First find the NLX-INFO in our
1362 ;;; environment. Note that this is never called on the escape exits
1363 ;;; for CATCH and UNWIND-PROTECT, since the escape functions aren't
1365 (defun ir2-convert-exit (node block
)
1366 (declare (type exit node
) (type ir2-block block
))
1367 (let ((loc (find-in-physenv (find-nlx-info (exit-entry node
)
1369 (node-physenv node
)))
1370 (temp (make-stack-pointer-tn))
1371 (value (exit-value node
)))
1372 (vop value-cell-ref node block loc temp
)
1374 (let ((locs (ir2-continuation-locs (continuation-info value
))))
1375 (vop unwind node block temp
(first locs
) (second locs
)))
1376 (let ((0-tn (emit-constant 0)))
1377 (vop unwind node block temp
0-tn
0-tn
))))
1381 ;;; %CLEANUP-POINT doesn't do anything except prevent the body from
1382 ;;; being entirely deleted.
1383 (defoptimizer (%cleanup-point ir2-convert
) (() node block
) node block
)
1385 ;;; This function invalidates a lexical exit on exiting from the
1386 ;;; dynamic extent. This is done by storing 0 into the indirect value
1387 ;;; cell that holds the closed unwind block.
1388 (defoptimizer (%lexical-exit-breakup ir2-convert
) ((info) node block
)
1389 (vop value-cell-set node block
1390 (find-in-physenv (continuation-value info
) (node-physenv node
))
1393 ;;; We have to do a spurious move of no values to the result
1394 ;;; continuation so that lifetime analysis won't get confused.
1395 (defun ir2-convert-throw (node block
)
1396 (declare (type mv-combination node
) (type ir2-block block
))
1397 (let ((args (basic-combination-args node
)))
1398 (check-catch-tag-type (first args
))
1399 (vop* throw node block
1400 ((continuation-tn node block
(first args
))
1402 (ir2-continuation-locs (continuation-info (second args
)))
1405 (move-continuation-result node block
() (node-cont node
))
1408 ;;; Emit code to set up a non-local exit. INFO is the NLX-INFO for the
1409 ;;; exit, and TAG is the continuation for the catch tag (if any.) We
1410 ;;; get at the target PC by passing in the label to the vop. The vop
1411 ;;; is responsible for building a return-PC object.
1412 (defun emit-nlx-start (node block info tag
)
1413 (declare (type node node
) (type ir2-block block
) (type nlx-info info
)
1414 (type (or continuation null
) tag
))
1415 (let* ((2info (nlx-info-info info
))
1416 (kind (cleanup-kind (nlx-info-cleanup info
)))
1417 (block-tn (physenv-live-tn
1418 (make-normal-tn (primitive-type-or-lose 'catch-block
))
1419 (node-physenv node
)))
1420 (res (make-stack-pointer-tn))
1421 (target-label (ir2-nlx-info-target 2info
)))
1423 (vop current-binding-pointer node block
1424 (car (ir2-nlx-info-dynamic-state 2info
)))
1425 (vop* save-dynamic-state node block
1427 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info
)) t
)))
1428 (vop current-stack-pointer node block
(ir2-nlx-info-save-sp 2info
))
1432 (vop make-catch-block node block block-tn
1433 (continuation-tn node block tag
) target-label res
))
1434 ((:unwind-protect
:block
:tagbody
)
1435 (vop make-unwind-block node block block-tn target-label res
)))
1439 (do-make-value-cell node block res
(ir2-nlx-info-home 2info
)))
1441 (vop set-unwind-protect node block block-tn
))
1446 ;;; Scan each of ENTRY's exits, setting up the exit for each lexical exit.
1447 (defun ir2-convert-entry (node block
)
1448 (declare (type entry node
) (type ir2-block block
))
1449 (dolist (exit (entry-exits node
))
1450 (let ((info (find-nlx-info node
(node-cont exit
))))
1452 (member (cleanup-kind (nlx-info-cleanup info
))
1453 '(:block
:tagbody
)))
1454 (emit-nlx-start node block info nil
))))
1457 ;;; Set up the unwind block for these guys.
1458 (defoptimizer (%catch ir2-convert
) ((info-cont tag
) node block
)
1459 (check-catch-tag-type tag
)
1460 (emit-nlx-start node block
(continuation-value info-cont
) tag
))
1461 (defoptimizer (%unwind-protect ir2-convert
) ((info-cont cleanup
) node block
)
1462 (emit-nlx-start node block
(continuation-value info-cont
) nil
))
1464 ;;; Emit the entry code for a non-local exit. We receive values and
1465 ;;; restore dynamic state.
1467 ;;; In the case of a lexical exit or CATCH, we look at the exit
1468 ;;; continuation's kind to determine which flavor of entry VOP to
1469 ;;; emit. If unknown values, emit the xxx-MULTIPLE variant to the
1470 ;;; continuation locs. If fixed values, make the appropriate number of
1471 ;;; temps in the standard values locations and use the other variant,
1472 ;;; delivering the temps to the continuation using
1473 ;;; MOVE-CONTINUATION-RESULT.
1475 ;;; In the UNWIND-PROTECT case, we deliver the first register
1476 ;;; argument, the argument count and the argument pointer to our
1477 ;;; continuation as multiple values. These values are the block exited
1478 ;;; to and the values start and count.
1480 ;;; After receiving values, we restore dynamic state. Except in the
1481 ;;; UNWIND-PROTECT case, the values receiving restores the stack
1482 ;;; pointer. In an UNWIND-PROTECT cleanup, we want to leave the stack
1483 ;;; pointer alone, since the thrown values are still out there.
1484 (defoptimizer (%nlx-entry ir2-convert
) ((info-cont) node block
)
1485 (let* ((info (continuation-value info-cont
))
1486 (cont (nlx-info-continuation info
))
1487 (2cont (continuation-info cont
))
1488 (2info (nlx-info-info info
))
1489 (top-loc (ir2-nlx-info-save-sp 2info
))
1490 (start-loc (make-nlx-entry-arg-start-location))
1491 (count-loc (make-arg-count-location))
1492 (target (ir2-nlx-info-target 2info
)))
1494 (ecase (cleanup-kind (nlx-info-cleanup info
))
1495 ((:catch
:block
:tagbody
)
1496 (if (and 2cont
(eq (ir2-continuation-kind 2cont
) :unknown
))
1497 (vop* nlx-entry-multiple node block
1498 (top-loc start-loc count-loc nil
)
1499 ((reference-tn-list (ir2-continuation-locs 2cont
) t
))
1501 (let ((locs (standard-result-tns cont
)))
1502 (vop* nlx-entry node block
1503 (top-loc start-loc count-loc nil
)
1504 ((reference-tn-list locs t
))
1507 (move-continuation-result node block locs cont
))))
1509 (let ((block-loc (standard-arg-location 0)))
1510 (vop uwp-entry node block target block-loc start-loc count-loc
)
1511 (move-continuation-result
1513 (list block-loc start-loc count-loc
)
1517 (when *collect-dynamic-statistics
*
1518 (vop count-me node block
*dynamic-counts-tn
*
1519 (block-number (ir2-block-block block
))))
1521 (vop* restore-dynamic-state node block
1522 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info
)) nil
))
1524 (vop unbind-to-here node block
1525 (car (ir2-nlx-info-dynamic-state 2info
)))))
1527 ;;;; n-argument functions
1529 (macrolet ((def (name)
1530 `(defoptimizer (,name ir2-convert
) ((&rest args
) node block
)
1531 (let* ((refs (move-tail-full-call-args node block
))
1532 (cont (node-cont node
))
1533 (res (continuation-result-tns
1535 (list (primitive-type (specifier-type 'list
))))))
1536 (vop* ,name node block
(refs) ((first res
) nil
)
1538 (move-continuation-result node block res cont
)))))
1542 ;;; Convert the code in a component into VOPs.
1543 (defun ir2-convert (component)
1544 (declare (type component component
))
1545 (let (#!+sb-dyncount
1546 (*dynamic-counts-tn
*
1547 (when *collect-dynamic-statistics
*
1549 (block-number (block-next (component-head component
))))
1550 (counts (make-array blocks
1551 :element-type
'(unsigned-byte 32)
1552 :initial-element
0))
1553 (info (make-dyncount-info
1554 :for
(component-name component
)
1555 :costs
(make-array blocks
1556 :element-type
'(unsigned-byte 32)
1559 (setf (ir2-component-dyncount-info (component-info component
))
1561 (emit-constant info
)
1562 (emit-constant counts
)))))
1564 (declare (type index num
))
1565 (do-ir2-blocks (2block component
)
1566 (let ((block (ir2-block-block 2block
)))
1567 (when (block-start block
)
1568 (setf (block-number block
) num
)
1570 (when *collect-dynamic-statistics
*
1571 (let ((first-node (continuation-next (block-start block
))))
1572 (unless (or (and (bind-p first-node
)
1573 (xep-p (bind-lambda first-node
)))
1574 (eq (continuation-fun-name
1575 (node-cont first-node
))
1580 #!+sb-dyncount
*dynamic-counts-tn
* #!-sb-dyncount nil
1582 (ir2-convert-block block
)
1586 ;;; If necessary, emit a terminal unconditional branch to go to the
1587 ;;; successor block. If the successor is the component tail, then
1588 ;;; there isn't really any successor, but if the end is an unknown,
1589 ;;; non-tail call, then we emit an error trap just in case the
1590 ;;; function really does return.
1591 (defun finish-ir2-block (block)
1592 (declare (type cblock block
))
1593 (let* ((2block (block-info block
))
1594 (last (block-last block
))
1595 (succ (block-succ block
)))
1597 (aver (and succ
(null (rest succ
))))
1598 (let ((target (first succ
)))
1599 (cond ((eq target
(component-tail (block-component block
)))
1600 (when (and (basic-combination-p last
)
1601 (eq (basic-combination-kind last
) :full
))
1602 (let* ((fun (basic-combination-fun last
))
1603 (use (continuation-use fun
))
1604 (name (and (ref-p use
)
1605 (leaf-has-source-name-p (ref-leaf use
))
1606 (leaf-source-name (ref-leaf use
)))))
1607 (unless (or (node-tail-p last
)
1608 (info :function
:info name
)
1609 (policy last
(zerop safety
)))
1610 (vop nil-fun-returned-error last
2block
1612 (emit-constant name
)
1613 (multiple-value-bind (tn named
)
1614 (fun-continuation-tn last
2block fun
)
1617 ((not (eq (ir2-block-next 2block
) (block-info target
)))
1618 (vop branch last
2block
(block-label target
)))))))
1622 ;;; Convert the code in a block into VOPs.
1623 (defun ir2-convert-block (block)
1624 (declare (type cblock block
))
1625 (let ((2block (block-info block
)))
1626 (do-nodes (node cont block
)
1629 (let ((2cont (continuation-info cont
)))
1631 (not (eq (ir2-continuation-kind 2cont
) :delayed
)))
1632 (ir2-convert-ref node
2block
))))
1634 (let ((kind (basic-combination-kind node
)))
1637 (ir2-convert-local-call node
2block
))
1639 (ir2-convert-full-call node
2block
))
1641 (let ((fun (fun-info-ir2-convert kind
)))
1643 (funcall fun node
2block
))
1644 ((eq (basic-combination-info node
) :full
)
1645 (ir2-convert-full-call node
2block
))
1647 (ir2-convert-template node
2block
))))))))
1649 (when (continuation-info (if-test node
))
1650 (ir2-convert-if node
2block
)))
1652 (let ((fun (bind-lambda node
)))
1653 (when (eq (lambda-home fun
) fun
)
1654 (ir2-convert-bind node
2block
))))
1656 (ir2-convert-return node
2block
))
1658 (ir2-convert-set node
2block
))
1661 ((eq (basic-combination-kind node
) :local
)
1662 (ir2-convert-mv-bind node
2block
))
1663 ((eq (continuation-fun-name (basic-combination-fun node
))
1665 (ir2-convert-throw node
2block
))
1667 (ir2-convert-mv-call node
2block
))))
1669 (when (exit-entry node
)
1670 (ir2-convert-exit node
2block
)))
1672 (ir2-convert-entry node
2block
)))))
1674 (finish-ir2-block block
)