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)
248 (aver (not (eql (functional-kind functional) :deleted)))
249 (unless (leaf-info functional)
250 (setf (leaf-info functional)
251 (make-entry-info :name (functional-debug-name functional))))
252 (let ((closure (etypecase functional
254 (assertions-on-ir2-converted-clambda functional)
255 (physenv-closure (get-lambda-physenv functional)))
257 (aver (eq (functional-kind functional) :toplevel-xep))
261 (let* ((physenv (node-physenv ref))
262 (tn (find-in-physenv functional physenv)))
263 (emit-move ref ir2-block tn res)))
264 ;; we're about to emit a reference to a "closure" that's actually
265 ;; an inlinable global function.
266 ((and (global-var-p (setf global-var
267 (functional-inline-expanded functional)))
268 (eq :global-function (global-var-kind global-var)))
269 (ir2-convert-global-var ref ir2-block global-var res))
271 ;; if we're here, we should have either a toplevel-xep (some
272 ;; global scope function in a different component) or an external
273 ;; reference to the "closure"'s body.
274 (aver (memq (functional-kind functional) '(:external :toplevel-xep)))
275 (let ((entry (make-load-time-constant-tn :entry functional)))
276 (emit-move ref ir2-block entry res)))))
279 (defun closure-initial-value (what this-env current-fp)
280 (declare (type (or nlx-info lambda-var clambda) what)
281 (type physenv this-env)
282 (type (or tn null) current-fp))
283 ;; If we have an indirect LAMBDA-VAR that does not require an
284 ;; EXPLICIT-VALUE-CELL, and is from this environment (not from being
285 ;; closed over), we need to store the current frame pointer.
286 (if (and (lambda-var-p what)
287 (lambda-var-indirect what)
288 (not (lambda-var-explicit-value-cell what))
289 (eq (lambda-physenv (lambda-var-home what))
292 (find-in-physenv what this-env)))
294 (defoptimizer (%allocate-closures ltn-annotate) ((leaves) node ltn-policy)
295 ltn-policy ; a hack to effectively (DECLARE (IGNORE LTN-POLICY))
296 (when (lvar-dynamic-extent leaves)
297 (let ((info (make-ir2-lvar *backend-t-primitive-type*)))
298 (setf (ir2-lvar-kind info) :delayed)
299 (setf (lvar-info leaves) info)
300 (setf (ir2-lvar-stack-pointer info)
301 (make-stack-pointer-tn)))))
303 (defoptimizer (%allocate-closures ir2-convert) ((leaves) call 2block)
304 (let ((dx-p (lvar-dynamic-extent leaves)))
307 (vop current-stack-pointer call 2block
308 (ir2-lvar-stack-pointer (lvar-info leaves))))
309 (dolist (leaf (lvar-value leaves))
310 (binding* ((xep (awhen (functional-entry-fun leaf)
311 ;; if the xep's been deleted then we can skip it
312 (if (eq (functional-kind it) :deleted)
315 (nil (aver (xep-p xep)))
316 (entry-info (lambda-info xep) :exit-if-null)
317 (tn (entry-info-closure-tn entry-info) :exit-if-null)
318 (closure (physenv-closure (get-lambda-physenv xep)))
319 (entry (make-load-time-constant-tn :entry xep)))
320 (let ((this-env (node-physenv call))
321 (leaf-dx-p (and dx-p (leaf-dynamic-extent leaf))))
322 (vop make-closure call 2block entry (length closure)
324 (loop for what in closure and n from 0 do
325 (unless (and (lambda-var-p what)
326 (null (leaf-refs what)))
327 ;; In LABELS a closure may refer to another closure
328 ;; in the same group, so we must be sure that we
329 ;; store a closure only after its creation.
331 ;; TODO: Here is a simple solution: we postpone
332 ;; putting of all closures after all creations
333 ;; (though it may require more registers).
335 (delayed (list tn (find-in-physenv what this-env) n))
336 (let ((initial-value (closure-initial-value
339 (vop closure-init call 2block
341 ;; An initial-value of NIL means to stash
342 ;; the frame pointer... which requires a
344 (vop closure-init-from-fp call 2block tn n)))))))))
345 (loop for (tn what n) in (delayed)
346 do (vop closure-init call 2block
350 ;;; Convert a SET node. If the NODE's LVAR is annotated, then we also
351 ;;; deliver the value to that lvar. If the var is a lexical variable
352 ;;; with no refs, then we don't actually set anything, since the
353 ;;; variable has been deleted.
354 (defun ir2-convert-set (node block)
355 (declare (type cset node) (type ir2-block block))
356 (let* ((lvar (node-lvar node))
357 (leaf (set-var node))
358 (val (lvar-tn node block (set-value node)))
361 lvar (list (primitive-type (leaf-type leaf))))
365 (when (leaf-refs leaf)
366 (let ((tn (find-in-physenv leaf (node-physenv node)))
367 (indirect (lambda-var-indirect leaf))
368 (explicit (lambda-var-explicit-value-cell leaf)))
370 ((and indirect explicit)
371 (vop value-cell-set node block tn val))
373 (not (eq (node-physenv node)
374 (lambda-physenv (lambda-var-home leaf)))))
375 (let ((setter (fourth (primitive-type-indirect-cell-type
376 (primitive-type (leaf-type leaf))))))
378 (funcall setter node block tn val (leaf-info leaf))
379 (vop ancestor-frame-set node block tn val (leaf-info leaf)))))
380 (t (emit-move node block val tn))))))
382 (aver (symbolp (leaf-source-name leaf)))
383 (ecase (global-var-kind leaf)
385 (vop set node block (emit-constant (leaf-source-name leaf)) val))
387 (vop %set-symbol-global-value node
388 block (emit-constant (leaf-source-name leaf)) val)))))
390 (emit-move node block val (first locs))
391 (move-lvar-result node block locs lvar)))
394 ;;;; utilities for receiving fixed values
396 ;;; Return a TN that can be referenced to get the value of LVAR. LVAR
397 ;;; must be LTN-ANNOTATED either as a delayed leaf ref or as a fixed,
398 ;;; single-value lvar.
400 ;;; The primitive-type of the result will always be the same as the
401 ;;; IR2-LVAR-PRIMITIVE-TYPE, ensuring that VOPs are always called with
402 ;;; TNs that satisfy the operand primitive-type restriction. We may
403 ;;; have to make a temporary of the desired type and move the actual
404 ;;; lvar TN into it. This happens when we delete a type check in
405 ;;; unsafe code or when we locally know something about the type of an
406 ;;; argument variable.
407 (defun lvar-tn (node block lvar)
408 (declare (type node node) (type ir2-block block) (type lvar lvar))
409 (let* ((2lvar (lvar-info lvar))
411 (ecase (ir2-lvar-kind 2lvar)
413 (let ((ref (lvar-uses lvar)))
414 (leaf-tn (ref-leaf ref) (node-physenv ref) (boxed-ref-p ref))))
416 (aver (= (length (ir2-lvar-locs 2lvar)) 1))
417 (first (ir2-lvar-locs 2lvar)))))
418 (ptype (ir2-lvar-primitive-type 2lvar)))
420 (cond ((eq (tn-primitive-type lvar-tn) ptype) lvar-tn)
422 (let ((temp (make-normal-tn ptype)))
423 (emit-move node block lvar-tn temp)
426 ;;; This is similar to LVAR-TN, but hacks multiple values. We return
427 ;;; TNs holding the values of LVAR with PTYPES as their primitive
428 ;;; types. LVAR must be annotated for the same number of fixed values
429 ;;; are there are PTYPES.
431 ;;; If the lvar has a type check, check the values into temps and
432 ;;; return the temps. When we have more values than assertions, we
433 ;;; move the extra values with no check.
434 (defun lvar-tns (node block lvar ptypes)
435 (declare (type node node) (type ir2-block block)
436 (type lvar lvar) (list ptypes))
437 (let* ((locs (ir2-lvar-locs (lvar-info lvar)))
438 (nlocs (length locs)))
439 (aver (= nlocs (length ptypes)))
441 (mapcar (lambda (from to-type)
442 (if (eq (tn-primitive-type from) to-type)
444 (let ((temp (make-normal-tn to-type)))
445 (emit-move node block from temp)
450 ;;;; utilities for delivering values to lvars
452 ;;; Return a list of TNs with the specifier TYPES that can be used as
453 ;;; result TNs to evaluate an expression into LVAR. This is used
454 ;;; together with MOVE-LVAR-RESULT to deliver fixed values to
457 ;;; If the lvar isn't annotated (meaning the values are discarded) or
458 ;;; is unknown-values, then we make temporaries for each supplied
459 ;;; value, providing a place to compute the result in until we decide
460 ;;; what to do with it (if anything.)
462 ;;; If the lvar is fixed-values, and wants the same number of values
463 ;;; as the user wants to deliver, then we just return the
464 ;;; IR2-LVAR-LOCS. Otherwise we make a new list padded as necessary by
465 ;;; discarded TNs. We always return a TN of the specified type, using
466 ;;; the lvar locs only when they are of the correct type.
467 (defun lvar-result-tns (lvar types)
468 (declare (type (or lvar null) lvar) (type list types))
470 (mapcar #'make-normal-tn types)
471 (let ((2lvar (lvar-info lvar)))
472 (ecase (ir2-lvar-kind 2lvar)
474 (let* ((locs (ir2-lvar-locs 2lvar))
475 (nlocs (length locs))
476 (ntypes (length types)))
477 (if (and (= nlocs ntypes)
478 (do ((loc locs (cdr loc))
479 (type types (cdr type)))
481 (unless (eq (tn-primitive-type (car loc)) (car type))
484 (mapcar (lambda (loc type)
485 (if (eq (tn-primitive-type loc) type)
487 (make-normal-tn type)))
490 (mapcar #'make-normal-tn
491 (subseq types nlocs)))
495 (mapcar #'make-normal-tn types))))))
497 ;;; Make the first N standard value TNs, returning them in a list.
498 (defun make-standard-value-tns (n)
499 (declare (type unsigned-byte n))
502 (res (standard-arg-location i)))
505 ;;; Return a list of TNs wired to the standard value passing
506 ;;; conventions that can be used to receive values according to the
507 ;;; unknown-values convention. This is used together with
508 ;;; MOVE-LVAR-RESULT for delivering unknown values to a fixed values
511 ;;; If the lvar isn't annotated, then we treat as 0-values, returning
512 ;;; an empty list of temporaries.
514 ;;; If the lvar is annotated, then it must be :FIXED.
515 (defun standard-result-tns (lvar)
516 (declare (type (or lvar null) lvar))
518 (let ((2lvar (lvar-info lvar)))
519 (ecase (ir2-lvar-kind 2lvar)
521 (make-standard-value-tns (length (ir2-lvar-locs 2lvar))))))
524 ;;; Just move each SRC TN into the corresponding DEST TN, defaulting
525 ;;; any unsupplied source values to NIL. We let EMIT-MOVE worry about
526 ;;; doing the appropriate coercions.
527 (defun move-results-coerced (node block src dest)
528 (declare (type node node) (type ir2-block block) (list src dest))
529 (let ((nsrc (length src))
530 (ndest (length dest)))
531 (mapc (lambda (from to)
533 (emit-move node block from to)))
535 (append src (make-list (- ndest nsrc)
536 :initial-element (emit-constant nil)))
541 ;;; Move each SRC TN into the corresponding DEST TN, checking types
542 ;;; and defaulting any unsupplied source values to NIL
543 (defun move-results-checked (node block src dest types)
544 (declare (type node node) (type ir2-block block) (list src dest types))
545 (let ((nsrc (length src))
546 (ndest (length dest))
547 (ntypes (length types)))
548 (mapc (lambda (from to type)
550 (emit-type-check node block from to type)
551 (emit-move node block from to)))
553 (append src (make-list (- ndest nsrc)
554 :initial-element (emit-constant nil)))
558 (append types (make-list (- ndest ntypes)))
562 ;;; If necessary, emit coercion code needed to deliver the RESULTS to
563 ;;; the specified lvar. NODE and BLOCK provide context for emitting
564 ;;; code. Although usually obtained from STANDARD-RESULT-TNs or
565 ;;; LVAR-RESULT-TNs, RESULTS may be a list of any type or
568 ;;; If the lvar is fixed values, then move the results into the lvar
569 ;;; locations. If the lvar is unknown values, then do the moves into
570 ;;; the standard value locations, and use PUSH-VALUES to put the
571 ;;; values on the stack.
572 (defun move-lvar-result (node block results lvar)
573 (declare (type node node) (type ir2-block block)
574 (list results) (type (or lvar null) lvar))
576 (let ((2lvar (lvar-info lvar)))
577 (ecase (ir2-lvar-kind 2lvar)
579 (let ((locs (ir2-lvar-locs 2lvar)))
580 (unless (eq locs results)
581 (move-results-coerced node block results locs))))
583 (let* ((nvals (length results))
584 (locs (make-standard-value-tns nvals)))
585 (move-results-coerced node block results locs)
586 (vop* push-values node block
587 ((reference-tn-list locs nil))
588 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
593 (defun ir2-convert-cast (node block)
594 (declare (type cast node)
595 (type ir2-block block))
596 (binding* ((lvar (node-lvar node) :exit-if-null)
597 (2lvar (lvar-info lvar))
598 (value (cast-value node))
599 (2value (lvar-info value)))
600 (cond ((eq (ir2-lvar-kind 2lvar) :unused))
601 ((eq (ir2-lvar-kind 2lvar) :unknown)
602 (aver (eq (ir2-lvar-kind 2value) :unknown))
603 (aver (not (cast-type-check node)))
604 (move-results-coerced node block
605 (ir2-lvar-locs 2value)
606 (ir2-lvar-locs 2lvar)))
607 ((eq (ir2-lvar-kind 2lvar) :fixed)
608 (aver (eq (ir2-lvar-kind 2value) :fixed))
609 (if (cast-type-check node)
610 (move-results-checked node block
611 (ir2-lvar-locs 2value)
612 (ir2-lvar-locs 2lvar)
613 (multiple-value-bind (check types)
614 (cast-check-types node nil)
615 (aver (eq check :simple))
617 (move-results-coerced node block
618 (ir2-lvar-locs 2value)
619 (ir2-lvar-locs 2lvar))))
620 (t (bug "CAST cannot be :DELAYED.")))))
622 ;;;; template conversion
624 ;;; Build a TN-REFS list that represents access to the values of the
625 ;;; specified list of lvars ARGS for TEMPLATE. Any :CONSTANT arguments
626 ;;; are returned in the second value as a list rather than being
627 ;;; accessed as a normal argument. NODE and BLOCK provide the context
628 ;;; for emitting any necessary type-checking code.
629 (defun reference-args (node block args template)
630 (declare (type node node) (type ir2-block block) (list args)
631 (type template template))
632 (collect ((info-args))
635 (do ((args args (cdr args))
636 (types (template-arg-types template) (cdr types)))
638 (let ((type (first types))
640 (if (and (consp type) (eq (car type) ':constant))
641 (info-args (lvar-value arg))
642 (let ((ref (reference-tn (lvar-tn node block arg) nil)))
644 (setf (tn-ref-across last) ref)
648 (values (the (or tn-ref null) first) (info-args)))))
650 ;;; Convert a conditional template. We try to exploit any
651 ;;; drop-through, but emit an unconditional branch afterward if we
652 ;;; fail. NOT-P is true if the sense of the TEMPLATE's test should be
654 (defun ir2-convert-conditional (node block template args info-args if not-p)
655 (declare (type node node) (type ir2-block block)
656 (type template template) (type (or tn-ref null) args)
657 (list info-args) (type cif if) (type boolean not-p))
658 (let ((consequent (if-consequent if))
659 (alternative (if-alternative if))
660 (flags (and (consp (template-result-types template))
661 (rest (template-result-types template)))))
662 (aver (= (template-info-arg-count template)
663 (+ (length info-args)
666 (rotatef consequent alternative)
668 (when (drop-thru-p if consequent)
669 (rotatef consequent alternative)
672 (emit-template node block template args nil
673 (list* (block-label consequent) not-p
675 (if (drop-thru-p if alternative)
676 (register-drop-thru alternative)
677 (vop branch node block (block-label alternative))))
679 (emit-template node block template args nil info-args)
680 (vop branch-if node block (block-label consequent) flags not-p)
681 (if (drop-thru-p if alternative)
682 (register-drop-thru alternative)
683 (vop branch node block (block-label alternative)))))))
685 ;;; Convert an IF that isn't the DEST of a conditional template.
686 (defun ir2-convert-if (node block)
687 (declare (type ir2-block block) (type cif node))
688 (let* ((test (if-test node))
689 (test-ref (reference-tn (lvar-tn node block test) nil))
690 (nil-ref (reference-tn (emit-constant nil) nil)))
691 (setf (tn-ref-across test-ref) nil-ref)
692 (ir2-convert-conditional node block (template-or-lose 'if-eq)
693 test-ref () node t)))
695 ;;; Return a list of primitive-types that we can pass to LVAR-RESULT-TNS
696 ;;; describing the result types we want for a template call. We are really
697 ;;; only interested in the number of results required: in normal case
698 ;;; TEMPLATE-RESULTS-OK has already checked them.
699 (defun find-template-result-types (call rtypes)
700 (let* ((type (node-derived-type call))
702 (mapcar #'primitive-type
703 (if (args-type-p type)
704 (append (args-type-required type)
705 (args-type-optional type))
707 (primitive-t *backend-t-primitive-type*))
708 (loop for rtype in rtypes
709 for type = (or (pop types) primitive-t)
712 ;;; Return a list of TNs usable in a CALL to TEMPLATE delivering values to
713 ;;; LVAR. As an efficiency hack, we pick off the common case where the LVAR is
714 ;;; fixed values and has locations that satisfy the result restrictions. This
715 ;;; can fail when there is a type check or a values count mismatch.
716 (defun make-template-result-tns (call lvar rtypes)
717 (declare (type combination call) (type (or lvar null) lvar)
719 (let ((2lvar (when lvar (lvar-info lvar))))
720 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :fixed))
721 (let ((locs (ir2-lvar-locs 2lvar)))
722 (if (and (= (length rtypes) (length locs))
723 (do ((loc locs (cdr loc))
724 (rtypes rtypes (cdr rtypes)))
726 (unless (operand-restriction-ok
728 (tn-primitive-type (car loc))
734 (find-template-result-types call rtypes))))
737 (find-template-result-types call rtypes)))))
739 ;;; Get the operands into TNs, make TN-REFs for them, and then call
740 ;;; the template emit function.
741 (defun ir2-convert-template (call block)
742 (declare (type combination call) (type ir2-block block))
743 (let* ((template (combination-info call))
744 (lvar (node-lvar call))
745 (rtypes (template-result-types template)))
746 (multiple-value-bind (args info-args)
747 (reference-args call block (combination-args call) template)
748 (aver (not (template-more-results-type template)))
749 (if (template-conditional-p template)
750 (ir2-convert-conditional call block template args info-args
751 (lvar-dest lvar) nil)
752 (let* ((results (make-template-result-tns call lvar rtypes))
753 (r-refs (reference-tn-list results t)))
754 (aver (= (length info-args)
755 (template-info-arg-count template)))
756 (when (and lvar (lvar-dynamic-extent lvar))
757 (vop current-stack-pointer call block
758 (ir2-lvar-stack-pointer (lvar-info lvar))))
759 (when (emit-step-p call)
760 (vop sb!vm::step-instrument-before-vop call block))
762 (emit-template call block template args r-refs info-args)
763 (emit-template call block template args r-refs))
764 (move-lvar-result call block results lvar)))))
767 ;;; We don't have to do much because operand count checking is done by
768 ;;; IR1 conversion. The only difference between this and the function
769 ;;; case of IR2-CONVERT-TEMPLATE is that there can be codegen-info
771 (defoptimizer (%%primitive ir2-convert) ((template info &rest args) call block)
772 (let* ((template (lvar-value template))
773 (info (lvar-value info))
774 (lvar (node-lvar call))
775 (rtypes (template-result-types template))
776 (results (make-template-result-tns call lvar rtypes))
777 (r-refs (reference-tn-list results t)))
778 (multiple-value-bind (args info-args)
779 (reference-args call block (cddr (combination-args call)) template)
780 (aver (not (template-more-results-type template)))
781 (aver (not (template-conditional-p template)))
782 (aver (null info-args))
785 (emit-template call block template args r-refs info)
786 (emit-template call block template args r-refs))
788 (move-lvar-result call block results lvar)))
791 (defoptimizer (%%primitive derive-type) ((template info &rest args))
792 (let ((type (template-type (lvar-value template))))
793 (if (fun-type-p type)
794 (fun-type-returns type)
799 ;;; Convert a LET by moving the argument values into the variables.
800 ;;; Since a LET doesn't have any passing locations, we move the
801 ;;; arguments directly into the variables. We must also allocate any
802 ;;; indirect value cells, since there is no function prologue to do
804 (defun ir2-convert-let (node block fun)
805 (declare (type combination node) (type ir2-block block) (type clambda fun))
806 (mapc (lambda (var arg)
808 (let ((src (lvar-tn node block arg))
809 (dest (leaf-info var)))
810 (if (and (lambda-var-indirect var)
811 (lambda-var-explicit-value-cell var))
812 (emit-make-value-cell node block src dest)
813 (emit-move node block src dest)))))
814 (lambda-vars fun) (basic-combination-args node))
817 ;;; Emit any necessary moves into assignment temps for a local call to
818 ;;; FUN. We return two lists of TNs: TNs holding the actual argument
819 ;;; values, and (possibly EQ) TNs that are the actual destination of
820 ;;; the arguments. When necessary, we allocate temporaries for
821 ;;; arguments to preserve parallel assignment semantics. These lists
822 ;;; exclude unused arguments and include implicit environment
823 ;;; arguments, i.e. they exactly correspond to the arguments passed.
825 ;;; OLD-FP is the TN currently holding the value we want to pass as
826 ;;; OLD-FP. If null, then the call is to the same environment (an
827 ;;; :ASSIGNMENT), so we only move the arguments, and leave the
828 ;;; environment alone.
830 ;;; CLOSURE-FP is for calling a closure that has "implicit" value
831 ;;; cells (stored in the allocating stack frame), and is the frame
832 ;;; pointer TN to use for values allocated in the outbound stack
833 ;;; frame. This is distinct from OLD-FP for the specific case of a
835 (defun emit-psetq-moves (node block fun old-fp &optional (closure-fp old-fp))
836 (declare (type combination node) (type ir2-block block) (type clambda fun)
837 (type (or tn null) old-fp closure-fp))
838 (let ((actuals (mapcar (lambda (x)
840 (lvar-tn node block x)))
841 (combination-args node))))
844 (dolist (var (lambda-vars fun))
845 (let ((actual (pop actuals))
846 (loc (leaf-info var)))
849 ((and (lambda-var-indirect var)
850 (lambda-var-explicit-value-cell var))
852 (make-normal-tn *backend-t-primitive-type*)))
853 (emit-make-value-cell node block actual temp)
855 ((member actual (locs))
856 (let ((temp (make-normal-tn (tn-primitive-type loc))))
857 (emit-move node block actual temp)
864 (let ((this-1env (node-physenv node))
865 (called-env (physenv-info (lambda-physenv fun))))
866 (dolist (thing (ir2-physenv-closure called-env))
867 (temps (closure-initial-value (car thing) this-1env closure-fp))
870 (locs (ir2-physenv-old-fp called-env))))
872 (values (temps) (locs)))))
874 ;;; A tail-recursive local call is done by emitting moves of stuff
875 ;;; into the appropriate passing locations. After setting up the args
876 ;;; and environment, we just move our return-pc into the called
877 ;;; function's passing location.
878 (defun ir2-convert-tail-local-call (node block fun)
879 (declare (type combination node) (type ir2-block block) (type clambda fun))
880 (let ((this-env (physenv-info (node-physenv node)))
881 (current-fp (make-stack-pointer-tn)))
882 (multiple-value-bind (temps locs)
883 (emit-psetq-moves node block fun
884 (ir2-physenv-old-fp this-env) current-fp)
886 ;; If we're about to emit a move from CURRENT-FP then we need to
888 (when (find current-fp temps)
889 (vop current-fp node block current-fp))
891 (mapc (lambda (temp loc)
892 (emit-move node block temp loc))
895 (emit-move node block
896 (ir2-physenv-return-pc this-env)
897 (ir2-physenv-return-pc-pass
899 (lambda-physenv fun)))))
903 ;;; Convert an :ASSIGNMENT call. This is just like a tail local call,
904 ;;; except that the caller and callee environment are the same, so we
905 ;;; don't need to mess with the environment locations, return PC, etc.
906 (defun ir2-convert-assignment (node block fun)
907 (declare (type combination node) (type ir2-block block) (type clambda fun))
908 (multiple-value-bind (temps locs) (emit-psetq-moves node block fun nil)
910 (mapc (lambda (temp loc)
911 (emit-move node block temp loc))
915 ;;; Do stuff to set up the arguments to a non-tail local call
916 ;;; (including implicit environment args.) We allocate a frame
917 ;;; (returning the FP and NFP), and also compute the TN-REFS list for
918 ;;; the values to pass and the list of passing location TNs.
919 (defun ir2-convert-local-call-args (node block fun)
920 (declare (type combination node) (type ir2-block block) (type clambda fun))
921 (let ((fp (make-stack-pointer-tn))
922 (nfp (make-number-stack-pointer-tn))
923 (old-fp (make-stack-pointer-tn)))
924 (multiple-value-bind (temps locs)
925 (emit-psetq-moves node block fun old-fp)
926 (vop current-fp node block old-fp)
927 (vop allocate-frame node block
928 (physenv-info (lambda-physenv fun))
930 (values fp nfp temps (mapcar #'make-alias-tn locs)))))
932 ;;; Handle a non-TR known-values local call. We emit the call, then
933 ;;; move the results to the lvar's destination.
934 (defun ir2-convert-local-known-call (node block fun returns lvar start)
935 (declare (type node node) (type ir2-block block) (type clambda fun)
936 (type return-info returns) (type (or lvar null) lvar)
938 (multiple-value-bind (fp nfp temps arg-locs)
939 (ir2-convert-local-call-args node block fun)
940 (let ((locs (return-info-locations returns)))
941 (vop* known-call-local node block
942 (fp nfp (reference-tn-list temps nil))
943 ((reference-tn-list locs t))
944 arg-locs (physenv-info (lambda-physenv fun)) start)
945 (move-lvar-result node block locs lvar)))
948 ;;; Handle a non-TR unknown-values local call. We do different things
949 ;;; depending on what kind of values the lvar wants.
951 ;;; If LVAR is :UNKNOWN, then we use the "multiple-" variant, directly
952 ;;; specifying the lvar's LOCS as the VOP results so that we don't
953 ;;; have to do anything after the call.
955 ;;; Otherwise, we use STANDARD-RESULT-TNS to get wired result TNs, and
956 ;;; then call MOVE-LVAR-RESULT to do any necessary type checks or
958 (defun ir2-convert-local-unknown-call (node block fun lvar start)
959 (declare (type node node) (type ir2-block block) (type clambda fun)
960 (type (or lvar null) lvar) (type label start))
961 (multiple-value-bind (fp nfp temps arg-locs)
962 (ir2-convert-local-call-args node block fun)
963 (let ((2lvar (and lvar (lvar-info lvar)))
964 (env (physenv-info (lambda-physenv fun)))
965 (temp-refs (reference-tn-list temps nil)))
966 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :unknown))
967 (vop* multiple-call-local node block (fp nfp temp-refs)
968 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
970 (let ((locs (standard-result-tns lvar)))
971 (vop* call-local node block
973 ((reference-tn-list locs t))
974 arg-locs env start (length locs))
975 (move-lvar-result node block locs lvar)))))
978 ;;; Dispatch to the appropriate function, depending on whether we have
979 ;;; a let, tail or normal call. If the function doesn't return, call
980 ;;; it using the unknown-value convention. We could compile it as a
981 ;;; tail call, but that might seem confusing in the debugger.
982 (defun ir2-convert-local-call (node block)
983 (declare (type combination node) (type ir2-block block))
984 (let* ((fun (ref-leaf (lvar-uses (basic-combination-fun node))))
985 (kind (functional-kind fun)))
986 (cond ((eq kind :let)
987 (ir2-convert-let node block fun))
988 ((eq kind :assignment)
989 (ir2-convert-assignment node block fun))
991 (ir2-convert-tail-local-call node block fun))
993 (let ((start (block-trampoline (lambda-block fun)))
994 (returns (tail-set-info (lambda-tail-set fun)))
995 (lvar (node-lvar node)))
997 (return-info-kind returns)
1000 (ir2-convert-local-unknown-call node block fun lvar start))
1002 (ir2-convert-local-known-call node block fun returns
1008 ;;; Given a function lvar FUN, return (VALUES TN-TO-CALL NAMED-P),
1009 ;;; where TN-TO-CALL is a TN holding the thing that we call NAMED-P is
1010 ;;; true if the thing is named (false if it is a function).
1012 ;;; There are two interesting non-named cases:
1013 ;;; -- We know it's a function. No check needed: return the
1015 ;;; -- We don't know what it is.
1016 (defun fun-lvar-tn (node block lvar)
1017 (declare (ignore node block))
1018 (declare (type lvar lvar))
1019 (let ((2lvar (lvar-info lvar)))
1020 (if (eq (ir2-lvar-kind 2lvar) :delayed)
1021 (let ((name (lvar-fun-name lvar t)))
1023 (values (make-load-time-constant-tn :fdefinition name) t))
1024 (let* ((locs (ir2-lvar-locs 2lvar))
1026 (function-ptype (primitive-type-or-lose 'function)))
1027 (aver (and (eq (ir2-lvar-kind 2lvar) :fixed)
1028 (= (length locs) 1)))
1029 (aver (eq (tn-primitive-type loc) function-ptype))
1030 (values loc nil)))))
1032 ;;; Set up the args to NODE in the current frame, and return a TN-REF
1033 ;;; list for the passing locations.
1034 (defun move-tail-full-call-args (node block)
1035 (declare (type combination node) (type ir2-block block))
1036 (let ((args (basic-combination-args node))
1039 (dotimes (num (length args))
1040 (let ((loc (standard-arg-location num)))
1041 (emit-move node block (lvar-tn node block (elt args num)) loc)
1042 (let ((ref (reference-tn loc nil)))
1044 (setf (tn-ref-across last) ref)
1049 ;;; Move the arguments into the passing locations and do a (possibly
1050 ;;; named) tail call.
1051 (defun ir2-convert-tail-full-call (node block)
1052 (declare (type combination node) (type ir2-block block))
1053 (let* ((env (physenv-info (node-physenv node)))
1054 (args (basic-combination-args node))
1055 (nargs (length args))
1056 (pass-refs (move-tail-full-call-args node block))
1057 (old-fp (ir2-physenv-old-fp env))
1058 (return-pc (ir2-physenv-return-pc env)))
1060 (multiple-value-bind (fun-tn named)
1061 (fun-lvar-tn node block (basic-combination-fun node))
1063 (vop* tail-call-named node block
1064 (fun-tn old-fp return-pc pass-refs)
1068 (vop* tail-call node block
1069 (fun-tn old-fp return-pc pass-refs)
1072 (emit-step-p node)))))
1076 ;;; like IR2-CONVERT-LOCAL-CALL-ARGS, only different
1077 (defun ir2-convert-full-call-args (node block)
1078 (declare (type combination node) (type ir2-block block))
1079 (let* ((args (basic-combination-args node))
1080 (fp (make-stack-pointer-tn))
1081 (nargs (length args)))
1082 (vop allocate-full-call-frame node block nargs fp)
1086 (dotimes (num nargs)
1087 (locs (standard-arg-location num))
1088 (let ((ref (reference-tn (lvar-tn node block (elt args num))
1091 (setf (tn-ref-across last) ref)
1095 (values fp first (locs) nargs)))))
1097 ;;; Do full call when a fixed number of values are desired. We make
1098 ;;; STANDARD-RESULT-TNS for our lvar, then deliver the result using
1099 ;;; MOVE-LVAR-RESULT. We do named or normal call, as appropriate.
1100 (defun ir2-convert-fixed-full-call (node block)
1101 (declare (type combination node) (type ir2-block block))
1102 (multiple-value-bind (fp args arg-locs nargs)
1103 (ir2-convert-full-call-args node block)
1104 (let* ((lvar (node-lvar node))
1105 (locs (standard-result-tns lvar))
1106 (loc-refs (reference-tn-list locs t))
1107 (nvals (length locs)))
1108 (multiple-value-bind (fun-tn named)
1109 (fun-lvar-tn node block (basic-combination-fun node))
1111 (vop* call-named node block (fp fun-tn args) (loc-refs)
1112 arg-locs nargs nvals (emit-step-p node))
1113 (vop* call node block (fp fun-tn args) (loc-refs)
1114 arg-locs nargs nvals (emit-step-p node)))
1115 (move-lvar-result node block locs lvar))))
1118 ;;; Do full call when unknown values are desired.
1119 (defun ir2-convert-multiple-full-call (node block)
1120 (declare (type combination node) (type ir2-block block))
1121 (multiple-value-bind (fp args arg-locs nargs)
1122 (ir2-convert-full-call-args node block)
1123 (let* ((lvar (node-lvar node))
1124 (locs (ir2-lvar-locs (lvar-info lvar)))
1125 (loc-refs (reference-tn-list locs t)))
1126 (multiple-value-bind (fun-tn named)
1127 (fun-lvar-tn node block (basic-combination-fun node))
1129 (vop* multiple-call-named node block (fp fun-tn args) (loc-refs)
1130 arg-locs nargs (emit-step-p node))
1131 (vop* multiple-call node block (fp fun-tn args) (loc-refs)
1132 arg-locs nargs (emit-step-p node))))))
1135 ;;; stuff to check in PONDER-FULL-CALL
1137 ;;; These came in handy when troubleshooting cold boot after making
1138 ;;; major changes in the package structure: various transforms and
1139 ;;; VOPs and stuff got attached to the wrong symbol, so that
1140 ;;; references to the right symbol were bogusly translated as full
1141 ;;; calls instead of primitives, sending the system off into infinite
1142 ;;; space. Having a report on all full calls generated makes it easier
1143 ;;; to figure out what form caused the problem this time.
1144 #!+sb-show (defvar *show-full-called-fnames-p* nil)
1145 #!+sb-show (defvar *full-called-fnames* (make-hash-table :test 'equal))
1147 ;;; Do some checks (and store some notes relevant for future checks)
1149 ;;; * Is this a full call to something we have reason to know should
1150 ;;; never be full called? (Except as of sbcl-0.7.18 or so, we no
1151 ;;; longer try to ensure this behavior when *FAILURE-P* has already
1153 ;;; * Is this a full call to (SETF FOO) which might conflict with
1154 ;;; a DEFSETF or some such thing elsewhere in the program?
1155 (defun ponder-full-call (node)
1156 (let* ((lvar (basic-combination-fun node))
1157 (fname (lvar-fun-name lvar t)))
1158 (declare (type (or symbol cons) fname))
1160 #!+sb-show (unless (gethash fname *full-called-fnames*)
1161 (setf (gethash fname *full-called-fnames*) t))
1162 #!+sb-show (when *show-full-called-fnames-p*
1163 (/show "converting full call to named function" fname)
1164 (/show (basic-combination-args node))
1165 (/show (policy node speed) (policy node safety))
1166 (/show (policy node compilation-speed))
1167 (let ((arg-types (mapcar (lambda (lvar)
1171 (basic-combination-args node))))
1174 ;; When illegal code is compiled, all sorts of perverse paths
1175 ;; through the compiler can be taken, and it's much harder -- and
1176 ;; probably pointless -- to guarantee that always-optimized-away
1177 ;; functions are actually optimized away. Thus, we skip the check
1180 ;; check to see if we know anything about the function
1181 (let ((info (info :function :info fname)))
1182 ;; if we know something, check to see if the full call was valid
1183 (when (and info (ir1-attributep (fun-info-attributes info)
1184 always-translatable))
1185 (/show (policy node speed) (policy node safety))
1186 (/show (policy node compilation-speed))
1187 (bug "full call to ~S" fname))))
1190 (aver (legal-fun-name-p fname))
1191 (destructuring-bind (setfoid &rest stem) fname
1192 (when (eq setfoid 'setf)
1193 (setf (gethash (car stem) *setf-assumed-fboundp*) t))))))
1195 ;;; If the call is in a tail recursive position and the return
1196 ;;; convention is standard, then do a tail full call. If one or fewer
1197 ;;; values are desired, then use a single-value call, otherwise use a
1198 ;;; multiple-values call.
1199 (defun ir2-convert-full-call (node block)
1200 (declare (type combination node) (type ir2-block block))
1201 (ponder-full-call node)
1202 (cond ((node-tail-p node)
1203 (ir2-convert-tail-full-call node block))
1204 ((let ((lvar (node-lvar node)))
1206 (eq (ir2-lvar-kind (lvar-info lvar)) :unknown)))
1207 (ir2-convert-multiple-full-call node block))
1209 (ir2-convert-fixed-full-call node block)))
1212 ;;;; entering functions
1214 ;;; Do all the stuff that needs to be done on XEP entry:
1215 ;;; -- Create frame.
1216 ;;; -- Copy any more arg.
1217 ;;; -- Set up the environment, accessing any closure variables.
1218 ;;; -- Move args from the standard passing locations to their internal
1220 (defun init-xep-environment (node block fun)
1221 (declare (type bind node) (type ir2-block block) (type clambda fun))
1222 (let ((start-label (entry-info-offset (leaf-info fun)))
1223 (env (physenv-info (node-physenv node))))
1224 (let ((ef (functional-entry-fun fun)))
1225 (cond ((and (optional-dispatch-p ef) (optional-dispatch-more-entry ef))
1226 ;; Special case the xep-allocate-frame + copy-more-arg case.
1227 (vop xep-allocate-frame node block start-label t)
1228 (vop copy-more-arg node block (optional-dispatch-max-args ef)))
1230 ;; No more args, so normal entry.
1231 (vop xep-allocate-frame node block start-label nil)))
1232 (if (ir2-physenv-closure env)
1233 (let ((closure (make-normal-tn *backend-t-primitive-type*)))
1234 (vop setup-closure-environment node block start-label closure)
1236 (dolist (loc (ir2-physenv-closure env))
1237 (vop closure-ref node block closure (incf n) (cdr loc)))))
1238 (vop setup-environment node block start-label)))
1240 (unless (eq (functional-kind fun) :toplevel)
1241 (let ((vars (lambda-vars fun))
1243 (when (leaf-refs (first vars))
1244 (emit-move node block (make-arg-count-location)
1245 (leaf-info (first vars))))
1246 (dolist (arg (rest vars))
1247 (when (leaf-refs arg)
1248 (let ((pass (standard-arg-location n))
1249 (home (leaf-info arg)))
1250 (if (and (lambda-var-indirect arg)
1251 (lambda-var-explicit-value-cell arg))
1252 (emit-make-value-cell node block pass home)
1253 (emit-move node block pass home))))
1256 (emit-move node block (make-old-fp-passing-location t)
1257 (ir2-physenv-old-fp env)))
1261 ;;; Emit function prolog code. This is only called on bind nodes for
1262 ;;; functions that allocate environments. All semantics of let calls
1263 ;;; are handled by IR2-CONVERT-LET.
1265 ;;; If not an XEP, all we do is move the return PC from its passing
1266 ;;; location, since in a local call, the caller allocates the frame
1267 ;;; and sets up the arguments.
1268 (defun ir2-convert-bind (node block)
1269 (declare (type bind node) (type ir2-block block))
1270 (let* ((fun (bind-lambda node))
1271 (env (physenv-info (lambda-physenv fun))))
1272 (aver (member (functional-kind fun)
1273 '(nil :external :optional :toplevel :cleanup)))
1276 (init-xep-environment node block fun)
1278 (when *collect-dynamic-statistics*
1279 (vop count-me node block *dynamic-counts-tn*
1280 (block-number (ir2-block-block block)))))
1284 (ir2-physenv-return-pc-pass env)
1285 (ir2-physenv-return-pc env))
1287 #!+unwind-to-frame-and-call-vop
1288 (when (and (lambda-allow-instrumenting fun)
1289 (not (lambda-inline-expanded fun))
1291 (policy fun (>= insert-debug-catch 2)))
1292 (vop sb!vm::bind-sentinel node block))
1294 (let ((lab (gen-label)))
1295 (setf (ir2-physenv-environment-start env) lab)
1296 (vop note-environment-start node block lab)
1298 (unless (policy fun (>= inhibit-safepoints 2))
1299 (vop sb!vm::insert-safepoint node block))))
1303 ;;;; function return
1305 ;;; Do stuff to return from a function with the specified values and
1306 ;;; convention. If the return convention is :FIXED and we aren't
1307 ;;; returning from an XEP, then we do a known return (letting
1308 ;;; representation selection insert the correct move-arg VOPs.)
1309 ;;; Otherwise, we use the unknown-values convention. If there is a
1310 ;;; fixed number of return values, then use RETURN, otherwise use
1311 ;;; RETURN-MULTIPLE.
1312 (defun ir2-convert-return (node block)
1313 (declare (type creturn node) (type ir2-block block))
1314 (let* ((lvar (return-result node))
1315 (2lvar (lvar-info lvar))
1316 (lvar-kind (ir2-lvar-kind 2lvar))
1317 (fun (return-lambda node))
1318 (env (physenv-info (lambda-physenv fun)))
1319 (old-fp (ir2-physenv-old-fp env))
1320 (return-pc (ir2-physenv-return-pc env))
1321 (returns (tail-set-info (lambda-tail-set fun))))
1322 #!+unwind-to-frame-and-call-vop
1323 (when (and (lambda-allow-instrumenting fun)
1324 (not (lambda-inline-expanded fun))
1325 (policy fun (>= insert-debug-catch 2)))
1326 (vop sb!vm::unbind-sentinel node block))
1328 ((and (eq (return-info-kind returns) :fixed)
1330 (let ((locs (lvar-tns node block lvar
1331 (return-info-types returns))))
1332 (vop* known-return node block
1333 (old-fp return-pc (reference-tn-list locs nil))
1335 (return-info-locations returns))))
1336 ((eq lvar-kind :fixed)
1337 (let* ((types (mapcar #'tn-primitive-type (ir2-lvar-locs 2lvar)))
1338 (lvar-locs (lvar-tns node block lvar types))
1339 (nvals (length lvar-locs))
1340 (locs (make-standard-value-tns nvals)))
1341 (mapc (lambda (val loc)
1342 (emit-move node block val loc))
1346 (vop return-single node block old-fp return-pc (car locs))
1347 (vop* return node block
1348 (old-fp return-pc (reference-tn-list locs nil))
1352 (aver (eq lvar-kind :unknown))
1353 (vop* return-multiple node block
1355 (reference-tn-list (ir2-lvar-locs 2lvar) nil))
1362 ;;;; These are used by the debugger to find the top function on the
1363 ;;;; stack. They return the OLD-FP and RETURN-PC for the current
1364 ;;;; function as multiple values.
1366 (defoptimizer (%caller-frame ir2-convert) (() node block)
1367 (let ((ir2-physenv (physenv-info (node-physenv node))))
1368 (move-lvar-result node block
1369 (list (ir2-physenv-old-fp ir2-physenv))
1372 (defoptimizer (%caller-pc ir2-convert) (() node block)
1373 (let ((ir2-physenv (physenv-info (node-physenv node))))
1374 (move-lvar-result node block
1375 (list (ir2-physenv-return-pc ir2-physenv))
1378 ;;;; multiple values
1380 ;;; This is almost identical to IR2-CONVERT-LET. Since LTN annotates
1381 ;;; the lvar for the correct number of values (with the lvar user
1382 ;;; responsible for defaulting), we can just pick them up from the
1384 (defun ir2-convert-mv-bind (node block)
1385 (declare (type mv-combination node) (type ir2-block block))
1386 (let* ((lvar (first (basic-combination-args node)))
1387 (fun (ref-leaf (lvar-uses (basic-combination-fun node))))
1388 (vars (lambda-vars fun)))
1389 (aver (eq (functional-kind fun) :mv-let))
1390 (mapc (lambda (src var)
1391 (when (leaf-refs var)
1392 (let ((dest (leaf-info var)))
1393 (if (and (lambda-var-indirect var)
1394 (lambda-var-explicit-value-cell var))
1395 (emit-make-value-cell node block src dest)
1396 (emit-move node block src dest)))))
1397 (lvar-tns node block lvar
1399 (primitive-type (leaf-type x)))
1404 ;;; Emit the appropriate fixed value, unknown value or tail variant of
1405 ;;; CALL-VARIABLE. Note that we only need to pass the values start for
1406 ;;; the first argument: all the other argument lvar TNs are
1407 ;;; ignored. This is because we require all of the values globs to be
1408 ;;; contiguous and on stack top.
1409 (defun ir2-convert-mv-call (node block)
1410 (declare (type mv-combination node) (type ir2-block block))
1411 (aver (basic-combination-args node))
1412 (let* ((start-lvar (lvar-info (first (basic-combination-args node))))
1413 (start (first (ir2-lvar-locs start-lvar)))
1414 (tails (and (node-tail-p node)
1415 (lambda-tail-set (node-home-lambda node))))
1416 (lvar (node-lvar node))
1417 (2lvar (and lvar (lvar-info lvar))))
1418 (multiple-value-bind (fun named)
1419 (fun-lvar-tn node block (basic-combination-fun node))
1420 (aver (and (not named)
1421 (eq (ir2-lvar-kind start-lvar) :unknown)))
1424 (let ((env (physenv-info (node-physenv node))))
1425 (vop tail-call-variable node block start fun
1426 (ir2-physenv-old-fp env)
1427 (ir2-physenv-return-pc env))))
1429 (eq (ir2-lvar-kind 2lvar) :unknown))
1430 (vop* multiple-call-variable node block (start fun nil)
1431 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
1432 (emit-step-p node)))
1434 (let ((locs (standard-result-tns lvar)))
1435 (vop* call-variable node block (start fun nil)
1436 ((reference-tn-list locs t)) (length locs)
1438 (move-lvar-result node block locs lvar)))))))
1440 ;;; Reset the stack pointer to the start of the specified
1441 ;;; unknown-values lvar (discarding it and all values globs on top of
1443 (defoptimizer (%pop-values ir2-convert) ((%lvar) node block)
1444 (let* ((lvar (lvar-value %lvar))
1445 (2lvar (lvar-info lvar)))
1446 (cond ((eq (ir2-lvar-kind 2lvar) :unknown)
1447 (vop reset-stack-pointer node block
1448 (first (ir2-lvar-locs 2lvar))))
1449 ((lvar-dynamic-extent lvar)
1450 (vop reset-stack-pointer node block
1451 (ir2-lvar-stack-pointer 2lvar)))
1452 (t (bug "Trying to pop a not stack-allocated LVAR ~S."
1455 (defoptimizer (%nip-values ir2-convert) ((last-nipped last-preserved
1458 (let* ( ;; pointer immediately after the nipped block
1459 (after (lvar-value last-nipped))
1460 (2after (lvar-info after))
1461 ;; pointer to the first nipped word
1462 (first (lvar-value last-preserved))
1463 (2first (lvar-info first))
1465 (moved-tns (loop for lvar-ref in moved
1466 for lvar = (lvar-value lvar-ref)
1467 for 2lvar = (lvar-info lvar)
1469 collect (first (ir2-lvar-locs 2lvar)))))
1470 (aver (or (eq (ir2-lvar-kind 2after) :unknown)
1471 (lvar-dynamic-extent after)))
1472 (aver (eq (ir2-lvar-kind 2first) :unknown))
1473 (when *check-consistency*
1474 ;; we cannot move stack-allocated DX objects
1475 (dolist (moved-lvar moved)
1476 (aver (eq (ir2-lvar-kind (lvar-info (lvar-value moved-lvar)))
1478 (flet ((nip-aligned (nipped)
1479 (vop* %%nip-values node block
1481 (first (ir2-lvar-locs 2first))
1482 (reference-tn-list moved-tns nil))
1483 ((reference-tn-list moved-tns t)))))
1484 (cond ((eq (ir2-lvar-kind 2after) :unknown)
1485 (nip-aligned (first (ir2-lvar-locs 2after))))
1486 ((lvar-dynamic-extent after)
1487 (nip-aligned (ir2-lvar-stack-pointer 2after)))
1489 (bug "Trying to nip a not stack-allocated LVAR ~S." after))))))
1491 ;;; Deliver the values TNs to LVAR using MOVE-LVAR-RESULT.
1492 (defoptimizer (values ir2-convert) ((&rest values) node block)
1493 (let ((tns (mapcar (lambda (x)
1494 (lvar-tn node block x))
1496 (move-lvar-result node block tns (node-lvar node))))
1498 ;;; In the normal case where unknown values are desired, we use the
1499 ;;; VALUES-LIST VOP. In the relatively unimportant case of VALUES-LIST
1500 ;;; for a fixed number of values, we punt by doing a full call to the
1501 ;;; VALUES-LIST function. This gets the full call VOP to deal with
1502 ;;; defaulting any unsupplied values. It seems unworthwhile to
1503 ;;; optimize this case.
1504 (defoptimizer (values-list ir2-convert) ((list) node block)
1505 (let* ((lvar (node-lvar node))
1506 (2lvar (and lvar (lvar-info lvar))))
1508 (eq (ir2-lvar-kind 2lvar) :unknown))
1509 (let ((locs (ir2-lvar-locs 2lvar)))
1510 (vop* values-list node block
1511 ((lvar-tn node block list) nil)
1512 ((reference-tn-list locs t)))))
1513 (t (aver (or (not 2lvar) ; i.e. we want to check the argument
1514 (eq (ir2-lvar-kind 2lvar) :fixed)))
1515 (ir2-convert-full-call node block)))))
1517 (defoptimizer (%more-arg-values ir2-convert) ((context start count) node block)
1518 (binding* ((lvar (node-lvar node) :exit-if-null)
1519 (2lvar (lvar-info lvar)))
1520 (ecase (ir2-lvar-kind 2lvar)
1522 ;; KLUDGE: this is very much unsafe, and can leak random stack values.
1523 ;; OTOH, I think the :FIXED case can only happen with (safety 0) in the
1526 (loop for loc in (ir2-lvar-locs 2lvar)
1528 do (vop sb!vm::more-arg node block
1529 (lvar-tn node block context)
1533 (let ((locs (ir2-lvar-locs 2lvar)))
1534 (vop* %more-arg-values node block
1535 ((lvar-tn node block context)
1536 (lvar-tn node block start)
1537 (lvar-tn node block count)
1539 ((reference-tn-list locs t))))))))
1541 ;;;; special binding
1543 ;;; This is trivial, given our assumption of a shallow-binding
1545 (defoptimizer (%special-bind ir2-convert) ((var value) node block)
1546 (let ((name (leaf-source-name (lvar-value var))))
1547 (vop bind node block (lvar-tn node block value)
1548 (emit-constant name))))
1549 (defoptimizer (%special-unbind ir2-convert) ((var) node block)
1550 (vop unbind node block))
1552 ;;; ### It's not clear that this really belongs in this file, or
1553 ;;; should really be done this way, but this is the least violation of
1554 ;;; abstraction in the current setup. We don't want to wire
1555 ;;; shallow-binding assumptions into IR1tran.
1556 (def-ir1-translator progv
1557 ((vars vals &body body) start next result)
1560 (with-unique-names (bind unbind)
1561 (once-only ((n-save-bs '(%primitive current-binding-pointer)))
1564 (labels ((,unbind (vars)
1565 (declare (optimize (speed 2) (debug 0)))
1566 (let ((unbound-marker (%primitive make-unbound-marker)))
1568 ;; CLHS says "bound and then made to have no value" -- user
1569 ;; should not be able to tell the difference between that and this.
1570 (about-to-modify-symbol-value var 'progv)
1571 (%primitive bind unbound-marker var))))
1573 (declare (optimize (speed 2) (debug 0)
1574 (insert-debug-catch 0)))
1576 ((null vals) (,unbind vars))
1578 (let ((val (car vals))
1580 (about-to-modify-symbol-value var 'progv val t)
1581 (%primitive bind val var))
1582 (,bind (cdr vars) (cdr vals))))))
1583 (,bind ,vars ,vals))
1586 ;; Technically ANSI CL doesn't allow declarations at the
1587 ;; start of the cleanup form. SBCL happens to allow for
1588 ;; them, due to the way the UNWIND-PROTECT ir1 translation
1589 ;; is implemented; the cleanup forms are directly spliced
1590 ;; into an FLET definition body. And a declaration here
1591 ;; actually has exactly the right scope for what we need
1592 ;; (ensure that debug instrumentation is not emitted for the
1593 ;; cleanup function). -- JES, 2007-06-16
1594 (declare (optimize (insert-debug-catch 0)))
1595 (%primitive unbind-to-here ,n-save-bs))))))
1599 ;;; Convert a non-local lexical exit. First find the NLX-INFO in our
1600 ;;; environment. Note that this is never called on the escape exits
1601 ;;; for CATCH and UNWIND-PROTECT, since the escape functions aren't
1603 (defun ir2-convert-exit (node block)
1604 (declare (type exit node) (type ir2-block block))
1605 (let* ((nlx (exit-nlx-info node))
1606 (loc (find-in-physenv nlx (node-physenv node)))
1607 (temp (make-stack-pointer-tn))
1608 (value (exit-value node)))
1609 (if (nlx-info-safe-p nlx)
1610 (vop value-cell-ref node block loc temp)
1611 (emit-move node block loc temp))
1613 (let ((locs (ir2-lvar-locs (lvar-info value))))
1614 (vop unwind node block temp (first locs) (second locs)))
1615 (let ((0-tn (emit-constant 0)))
1616 (vop unwind node block temp 0-tn 0-tn))))
1620 ;;; %CLEANUP-POINT doesn't do anything except prevent the body from
1621 ;;; being entirely deleted.
1622 (defoptimizer (%cleanup-point ir2-convert) (() node block) node block)
1624 ;;; This function invalidates a lexical exit on exiting from the
1625 ;;; dynamic extent. This is done by storing 0 into the indirect value
1626 ;;; cell that holds the closed unwind block.
1627 (defoptimizer (%lexical-exit-breakup ir2-convert) ((info) node block)
1628 (let ((nlx (lvar-value info)))
1629 (when (nlx-info-safe-p nlx)
1630 (vop value-cell-set node block
1631 (find-in-physenv nlx (node-physenv node))
1632 (emit-constant 0)))))
1634 ;;; We have to do a spurious move of no values to the result lvar so
1635 ;;; that lifetime analysis won't get confused.
1636 (defun ir2-convert-throw (node block)
1637 (declare (type mv-combination node) (type ir2-block block))
1638 (let ((args (basic-combination-args node)))
1639 (check-catch-tag-type (first args))
1640 (vop* throw node block
1641 ((lvar-tn node block (first args))
1643 (ir2-lvar-locs (lvar-info (second args)))
1646 (move-lvar-result node block () (node-lvar node))
1649 ;;; Emit code to set up a non-local exit. INFO is the NLX-INFO for the
1650 ;;; exit, and TAG is the lvar for the catch tag (if any.) We get at
1651 ;;; the target PC by passing in the label to the vop. The vop is
1652 ;;; responsible for building a return-PC object.
1653 (defun emit-nlx-start (node block info tag)
1654 (declare (type node node) (type ir2-block block) (type nlx-info info)
1655 (type (or lvar null) tag))
1656 (let* ((2info (nlx-info-info info))
1657 (kind (cleanup-kind (nlx-info-cleanup info)))
1658 (block-tn (physenv-live-tn
1659 (make-normal-tn (primitive-type-or-lose 'catch-block))
1660 (node-physenv node)))
1661 (res (make-stack-pointer-tn))
1662 (target-label (ir2-nlx-info-target 2info)))
1664 (vop current-binding-pointer node block
1665 (car (ir2-nlx-info-dynamic-state 2info)))
1666 (vop* save-dynamic-state node block
1668 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info)) t)))
1669 (vop current-stack-pointer node block (ir2-nlx-info-save-sp 2info))
1673 (vop make-catch-block node block block-tn
1674 (lvar-tn node block tag) target-label res))
1675 ((:unwind-protect :block :tagbody)
1676 (vop make-unwind-block node block block-tn target-label res)))
1680 (if (nlx-info-safe-p info)
1681 (emit-make-value-cell node block res (ir2-nlx-info-home 2info))
1682 (emit-move node block res (ir2-nlx-info-home 2info))))
1684 (vop set-unwind-protect node block block-tn))
1689 ;;; Scan each of ENTRY's exits, setting up the exit for each lexical exit.
1690 (defun ir2-convert-entry (node block)
1691 (declare (type entry node) (type ir2-block block))
1693 (dolist (exit (entry-exits node))
1694 (let ((info (exit-nlx-info exit)))
1696 (not (memq info nlxes))
1697 (member (cleanup-kind (nlx-info-cleanup info))
1698 '(:block :tagbody)))
1700 (emit-nlx-start node block info nil)))))
1703 ;;; Set up the unwind block for these guys.
1704 (defoptimizer (%catch ir2-convert) ((info-lvar tag) node block)
1705 (check-catch-tag-type tag)
1706 (emit-nlx-start node block (lvar-value info-lvar) tag))
1707 (defoptimizer (%unwind-protect ir2-convert) ((info-lvar cleanup) node block)
1708 (emit-nlx-start node block (lvar-value info-lvar) nil))
1710 ;;; Emit the entry code for a non-local exit. We receive values and
1711 ;;; restore dynamic state.
1713 ;;; In the case of a lexical exit or CATCH, we look at the exit lvar's
1714 ;;; kind to determine which flavor of entry VOP to emit. If unknown
1715 ;;; values, emit the xxx-MULTIPLE variant to the lvar locs. If fixed
1716 ;;; values, make the appropriate number of temps in the standard
1717 ;;; values locations and use the other variant, delivering the temps
1718 ;;; to the lvar using MOVE-LVAR-RESULT.
1720 ;;; In the UNWIND-PROTECT case, we deliver the first register
1721 ;;; argument, the argument count and the argument pointer to our lvar
1722 ;;; as multiple values. These values are the block exited to and the
1723 ;;; values start and count.
1725 ;;; After receiving values, we restore dynamic state. Except in the
1726 ;;; UNWIND-PROTECT case, the values receiving restores the stack
1727 ;;; pointer. In an UNWIND-PROTECT cleanup, we want to leave the stack
1728 ;;; pointer alone, since the thrown values are still out there.
1729 (defoptimizer (%nlx-entry ir2-convert) ((info-lvar) node block)
1730 (let* ((info (lvar-value info-lvar))
1731 (lvar (node-lvar node))
1732 (2info (nlx-info-info info))
1733 (top-loc (ir2-nlx-info-save-sp 2info))
1734 (start-loc (make-nlx-entry-arg-start-location))
1735 (count-loc (make-arg-count-location))
1736 (target (ir2-nlx-info-target 2info)))
1738 (ecase (cleanup-kind (nlx-info-cleanup info))
1739 ((:catch :block :tagbody)
1740 (let ((2lvar (and lvar (lvar-info lvar))))
1741 (if (and 2lvar (eq (ir2-lvar-kind 2lvar) :unknown))
1742 (vop* nlx-entry-multiple node block
1743 (top-loc start-loc count-loc nil)
1744 ((reference-tn-list (ir2-lvar-locs 2lvar) t))
1746 (let ((locs (standard-result-tns lvar)))
1747 (vop* nlx-entry node block
1748 (top-loc start-loc count-loc nil)
1749 ((reference-tn-list locs t))
1752 (move-lvar-result node block locs lvar)))))
1754 (let ((block-loc (standard-arg-location 0)))
1755 (vop uwp-entry node block target block-loc start-loc count-loc)
1758 (list block-loc start-loc count-loc)
1762 (when *collect-dynamic-statistics*
1763 (vop count-me node block *dynamic-counts-tn*
1764 (block-number (ir2-block-block block))))
1766 (vop* restore-dynamic-state node block
1767 ((reference-tn-list (cdr (ir2-nlx-info-dynamic-state 2info)) nil))
1769 (vop unbind-to-here node block
1770 (car (ir2-nlx-info-dynamic-state 2info)))))
1772 ;;;; n-argument functions
1774 (macrolet ((def (name)
1775 `(defoptimizer (,name ir2-convert) ((&rest args) node block)
1776 (let* ((refs (move-tail-full-call-args node block))
1777 (lvar (node-lvar node))
1778 (res (lvar-result-tns
1780 (list (primitive-type (specifier-type 'list))))))
1781 (when (and lvar (lvar-dynamic-extent lvar))
1782 (vop current-stack-pointer node block
1783 (ir2-lvar-stack-pointer (lvar-info lvar))))
1784 (vop* ,name node block (refs) ((first res) nil)
1786 (move-lvar-result node block res lvar)))))
1791 (defoptimizer (mask-signed-field ir2-convert) ((width x) node block)
1793 (when (constant-lvar-p width)
1794 (case (lvar-value width)
1795 (#.(- sb!vm:n-word-bits sb!vm:n-fixnum-tag-bits)
1796 (when (or (csubtypep (lvar-type x)
1797 (specifier-type 'word))
1798 (csubtypep (lvar-type x)
1799 (specifier-type 'sb!vm:signed-word)))
1800 (let* ((lvar (node-lvar node))
1801 (temp (make-normal-tn
1802 (if (csubtypep (lvar-type x)
1803 (specifier-type 'word))
1804 (primitive-type-of most-positive-word)
1806 (- (ash most-positive-word -1))))))
1807 (results (lvar-result-tns
1809 (list (primitive-type-or-lose 'fixnum)))))
1810 (emit-move node block (lvar-tn node block x) temp)
1811 (vop sb!vm::move-from-word/fixnum node block
1812 temp (first results))
1813 (move-lvar-result node block results lvar)
1815 (#.sb!vm:n-word-bits
1816 (when (csubtypep (lvar-type x) (specifier-type 'word))
1817 (let* ((lvar (node-lvar node))
1818 (temp (make-normal-tn
1819 (primitive-type-of most-positive-word)))
1820 (results (lvar-result-tns
1822 (list (primitive-type
1823 (specifier-type 'sb!vm:signed-word))))))
1824 (emit-move node block (lvar-tn node block x) temp)
1825 (vop sb!vm::word-move node block
1826 temp (first results))
1827 (move-lvar-result node block results lvar)
1829 (ir2-convert-full-call node block)))
1831 ;;; Convert the code in a component into VOPs.
1832 (defun ir2-convert (component)
1833 (declare (type component component))
1834 (let (#!+sb-dyncount
1835 (*dynamic-counts-tn*
1836 (when *collect-dynamic-statistics*
1838 (block-number (block-next (component-head component))))
1839 (counts (make-array blocks
1840 :element-type '(unsigned-byte 32)
1841 :initial-element 0))
1842 (info (make-dyncount-info
1843 :for (component-name component)
1844 :costs (make-array blocks
1845 :element-type '(unsigned-byte 32)
1848 (setf (ir2-component-dyncount-info (component-info component))
1850 (emit-constant info)
1851 (emit-constant counts)))))
1853 (declare (type index num))
1854 (do-ir2-blocks (2block component)
1855 (let ((block (ir2-block-block 2block)))
1856 (when (block-start block)
1857 (setf (block-number block) num)
1859 (when *collect-dynamic-statistics*
1860 (let ((first-node (block-start-node block)))
1861 (unless (or (and (bind-p first-node)
1862 (xep-p (bind-lambda first-node)))
1864 (node-lvar first-node))
1869 #!+sb-dyncount *dynamic-counts-tn* #!-sb-dyncount nil
1872 (let ((first-node (block-start-node block)))
1873 (unless (or (and (bind-p first-node)
1874 (xep-p (bind-lambda first-node)))
1875 (and (valued-node-p first-node)
1876 (node-lvar first-node)
1878 (node-lvar first-node))
1880 (when (and (rest (block-pred block))
1882 (member (loop-kind (block-loop block))
1883 '(:natural :strange))
1884 (eq block (loop-head (block-loop block)))
1885 (policy first-node (< inhibit-safepoints 2)))
1886 (vop sb!vm::insert-safepoint first-node 2block))))
1887 (ir2-convert-block block)
1891 ;;; If necessary, emit a terminal unconditional branch to go to the
1892 ;;; successor block. If the successor is the component tail, then
1893 ;;; there isn't really any successor, but if the end is an unknown,
1894 ;;; non-tail call, then we emit an error trap just in case the
1895 ;;; function really does return.
1896 (defun finish-ir2-block (block)
1897 (declare (type cblock block))
1898 (let* ((2block (block-info block))
1899 (last (block-last block))
1900 (succ (block-succ block)))
1902 (aver (singleton-p succ))
1903 (let ((target (first succ)))
1904 (cond ((eq target (component-tail (block-component block)))
1905 (when (and (basic-combination-p last)
1906 (eq (basic-combination-kind last) :full))
1907 (let* ((fun (basic-combination-fun last))
1908 (use (lvar-uses fun))
1909 (name (and (ref-p use)
1910 (leaf-has-source-name-p (ref-leaf use))
1911 (leaf-source-name (ref-leaf use)))))
1912 (unless (or (node-tail-p last)
1913 (info :function :info name)
1914 (policy last (zerop safety)))
1915 (vop nil-fun-returned-error last 2block
1917 (emit-constant name)
1918 (multiple-value-bind (tn named)
1919 (fun-lvar-tn last 2block fun)
1922 ((not (eq (ir2-block-next 2block) (block-info target)))
1923 (vop branch last 2block (block-label target)))
1925 (register-drop-thru target))))))
1929 ;;; Convert the code in a block into VOPs.
1930 (defun ir2-convert-block (block)
1931 (declare (type cblock block))
1932 (let ((2block (block-info block)))
1933 (do-nodes (node lvar block)
1937 (let ((2lvar (lvar-info lvar)))
1938 ;; function REF in a local call is not annotated
1939 (when (and 2lvar (not (eq (ir2-lvar-kind 2lvar) :delayed)))
1940 (ir2-convert-ref node 2block)))))
1942 (let ((kind (basic-combination-kind node)))
1945 (ir2-convert-local-call node 2block))
1947 (ir2-convert-full-call node 2block))
1949 (let* ((info (basic-combination-fun-info node))
1950 (fun (fun-info-ir2-convert info)))
1952 (funcall fun node 2block))
1953 ((eq (basic-combination-info node) :full)
1954 (ir2-convert-full-call node 2block))
1956 (ir2-convert-template node 2block))))))))
1958 (when (lvar-info (if-test node))
1959 (ir2-convert-if node 2block)))
1961 (let ((fun (bind-lambda node)))
1962 (when (eq (lambda-home fun) fun)
1963 (ir2-convert-bind node 2block))))
1965 (ir2-convert-return node 2block))
1967 (ir2-convert-set node 2block))
1969 (ir2-convert-cast node 2block))
1972 ((eq (basic-combination-kind node) :local)
1973 (ir2-convert-mv-bind node 2block))
1974 ((eq (lvar-fun-name (basic-combination-fun node))
1976 (ir2-convert-throw node 2block))
1978 (ir2-convert-mv-call node 2block))))
1980 (when (exit-entry node)
1981 (ir2-convert-exit node 2block)))
1983 (ir2-convert-entry node 2block)))))
1985 (finish-ir2-block block)