1 ;;;; the top level interfaces to the compiler, plus some other
2 ;;;; compiler-related stuff (e.g. CL:CALL-ARGUMENTS-LIMIT) which
3 ;;;; doesn't obviously belong anywhere else
5 ;;;; This software is part of the SBCL system. See the README file for
8 ;;;; This software is derived from the CMU CL system, which was
9 ;;;; written at Carnegie Mellon University and released into the
10 ;;;; public domain. The software is in the public domain and is
11 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
12 ;;;; files for more information.
16 ;;; FIXME: Doesn't this belong somewhere else, like early-c.lisp?
17 (declaim (special *constants* *free-vars* *component-being-compiled*
18 *free-funs* *source-paths*
19 *continuation-number* *continuation-numbers*
20 *number-continuations* *tn-id* *tn-ids* *id-tns*
21 *label-ids* *label-id* *id-labels*
22 *undefined-warnings* *compiler-error-count*
23 *compiler-warning-count* *compiler-style-warning-count*
25 *compiler-error-bailout*
26 #!+sb-show *compiler-trace-output*
27 *last-source-context* *last-original-source*
28 *last-source-form* *last-format-string* *last-format-args*
29 *last-message-count* *last-error-context*
30 *lexenv* *fun-names-in-this-file*
31 *allow-instrumenting*))
33 ;;; Whether reference to a thing which cannot be defined causes a full
35 (defvar *flame-on-necessarily-undefined-thing* nil)
37 (defvar *check-consistency* nil)
39 ;;; Set to NIL to disable loop analysis for register allocation.
40 (defvar *loop-analyze* t)
42 ;;; Bind this to a stream to capture various internal debugging output.
43 (defvar *compiler-trace-output* nil)
45 ;;; The current block compilation state. These are initialized to the
46 ;;; :BLOCK-COMPILE and :ENTRY-POINTS arguments that COMPILE-FILE was
49 ;;; *BLOCK-COMPILE-ARG* holds the original value of the :BLOCK-COMPILE
50 ;;; argument, which overrides any internal declarations.
51 (defvar *block-compile*)
52 (defvar *block-compile-arg*)
53 (declaim (type (member nil t :specified) *block-compile* *block-compile-arg*))
54 (defvar *entry-points*)
55 (declaim (list *entry-points*))
57 ;;; When block compiling, used by PROCESS-FORM to accumulate top level
58 ;;; lambdas resulting from compiling subforms. (In reverse order.)
59 (defvar *toplevel-lambdas*)
60 (declaim (list *toplevel-lambdas*))
62 ;;; The current non-macroexpanded toplevel form as printed when
63 ;;; *compile-print* is true.
64 (defvar *top-level-form-noted* nil)
66 (defvar sb!xc:*compile-verbose* t
68 "The default for the :VERBOSE argument to COMPILE-FILE.")
69 (defvar sb!xc:*compile-print* t
71 "The default for the :PRINT argument to COMPILE-FILE.")
72 (defvar *compile-progress* nil
74 "When this is true, the compiler prints to *STANDARD-OUTPUT* progress
75 information about the phases of compilation of each function. (This
76 is useful mainly in large block compilations.)")
78 (defvar sb!xc:*compile-file-pathname* nil
80 "The defaulted pathname of the file currently being compiled, or NIL if not
82 (defvar sb!xc:*compile-file-truename* nil
84 "The TRUENAME of the file currently being compiled, or NIL if not
87 (declaim (type (or pathname null)
88 sb!xc:*compile-file-pathname*
89 sb!xc:*compile-file-truename*))
91 ;;; the SOURCE-INFO structure for the current compilation. This is
92 ;;; null globally to indicate that we aren't currently in any
93 ;;; identifiable compilation.
94 (defvar *source-info* nil)
96 ;;; This is true if we are within a WITH-COMPILATION-UNIT form (which
97 ;;; normally causes nested uses to be no-ops).
98 (defvar *in-compilation-unit* nil)
100 ;;; Count of the number of compilation units dynamically enclosed by
101 ;;; the current active WITH-COMPILATION-UNIT that were unwound out of.
102 (defvar *aborted-compilation-unit-count*)
104 ;;; Mumble conditional on *COMPILE-PROGRESS*.
105 (defun maybe-mumble (&rest foo)
106 (when *compile-progress*
107 (compiler-mumble "~&")
108 (pprint-logical-block (*standard-output* nil :per-line-prefix "; ")
109 (apply #'compiler-mumble foo))))
111 (deftype object () '(or fasl-output core-object null))
113 (defvar *compile-object* nil)
114 (declaim (type object *compile-object*))
115 (defvar *compile-toplevel-object* nil)
117 (defvar *emit-cfasl* nil)
119 (defvar *fopcompile-label-counter*)
121 ;; Used during compilation to map code paths to the matching
122 ;; instrumentation conses.
123 (defvar *code-coverage-records* nil)
124 ;; Used during compilation to keep track of with source paths have been
125 ;; instrumented in which blocks.
126 (defvar *code-coverage-blocks* nil)
127 ;; Stores the code coverage instrumentation results. Keys are namestrings,
128 ;; the value is a list of (CONS PATH STATE), where STATE is NIL for
129 ;; a path that has not been visited, and T for one that has.
130 (defvar *code-coverage-info* (make-hash-table :test 'equal))
133 ;;;; WITH-COMPILATION-UNIT and WITH-COMPILATION-VALUES
135 (defmacro sb!xc:with-compilation-unit (options &body body)
137 "Affects compilations that take place within its dynamic extent. It is
138 intended to be eg. wrapped around the compilation of all files in the same system.
140 Following options are defined:
142 :OVERRIDE Boolean-Form
143 One of the effects of this form is to delay undefined warnings until the
144 end of the form, instead of giving them at the end of each compilation.
145 If OVERRIDE is NIL (the default), then the outermost
146 WITH-COMPILATION-UNIT form grabs the undefined warnings. Specifying
147 OVERRIDE true causes that form to grab any enclosed warnings, even if it
148 is enclosed by another WITH-COMPILATION-UNIT.
150 :POLICY Optimize-Declaration-Form
151 Provides dynamic scoping for global compiler optimization qualities and
152 restrictions, limiting effects of subsequent OPTIMIZE proclamations and
153 calls to SB-EXT:RESTRICT-COMPILER-POLICY to the dynamic scope of BODY.
155 If OVERRIDE is false, specified POLICY is merged with current global
156 policy. If OVERRIDE is true, current global policy, including any
157 restrictions, is discarded in favor of the specified POLICY.
159 Supplying POLICY NIL is equivalent to the option not being supplied at
160 all, ie. dynamic scoping of policy does not take place.
162 This option is an SBCL-specific experimental extension: Interface
165 :SOURCE-NAMESTRING Namestring-Form
166 Attaches the value returned by the Namestring-Form to the internal
167 debug-source information as the namestring of the source file. Normally
168 the namestring of the input-file for COMPILE-FILE is used: this option
169 can be used to provide source-file information for functions compiled
170 using COMPILE, or to override the input-file of COMPILE-FILE.
172 If both an outer and an inner WITH-COMPILATION-UNIT provide a
173 SOURCE-NAMESTRING, the inner one takes precedence. Unaffected
176 This is an SBCL-specific extension.
178 :SOURCE-PLIST Plist-Form
179 Attaches the value returned by the Plist-Form to internal debug-source
180 information of functions compiled in within the dynamic extent of BODY.
182 Primarily for use by development environments, in order to eg. associate
183 function definitions with editor-buffers. Can be accessed using
184 SB-INTROSPECT:DEFINITION-SOURCE-PLIST.
186 If an outer WITH-COMPILATION-UNIT form also provide a SOURCE-PLIST, it
187 is appended to the end of the provided SOURCE-PLIST. Unaffected
190 This is an SBCL-specific extension.
194 ;; Prevent proclamations from the file leaking, and restrict
195 ;; SAFETY to 3 -- otherwise uses the current global policy.
196 (with-compilation-unit (:policy '(optimize))
197 (restrict-compiler-policy 'safety 3)
200 ;; Using default policy instead of the current global one,
201 ;; except for DEBUG 3.
202 (with-compilation-unit (:policy '(optimize debug)
206 ;; Same as if :POLICY had not been specified at all: SAFETY 3
207 ;; proclamation leaks out from WITH-COMPILATION-UNIT.
208 (with-compilation-unit (:policy nil)
209 (declaim (optimize safety))
212 `(%with-compilation-unit (lambda () ,@body) ,@options))
214 (defvar *source-plist* nil)
215 (defvar *source-namestring* nil)
217 (defun %with-compilation-unit (fn &key override policy source-plist source-namestring)
218 (declare (type function fn))
220 (let ((succeeded-p nil)
221 (*source-plist* (append source-plist *source-plist*))
222 (*source-namestring* (or source-namestring *source-namestring*)))
223 (if (and *in-compilation-unit* (not override))
224 ;; Inside another WITH-COMPILATION-UNIT, a WITH-COMPILATION-UNIT is
225 ;; ordinarily (unless OVERRIDE) basically a no-op.
227 (multiple-value-prog1 (funcall fn) (setf succeeded-p t))
229 (incf *aborted-compilation-unit-count*)))
230 (let ((*aborted-compilation-unit-count* 0)
231 (*compiler-error-count* 0)
232 (*compiler-warning-count* 0)
233 (*compiler-style-warning-count* 0)
234 (*compiler-note-count* 0)
235 (*undefined-warnings* nil)
236 (*in-compilation-unit* t))
237 (handler-bind ((parse-unknown-type
239 (note-undefined-reference
240 (parse-unknown-type-specifier c)
243 (multiple-value-prog1 (funcall fn) (setf succeeded-p t))
245 (incf *aborted-compilation-unit-count*))
246 (summarize-compilation-unit (not succeeded-p)))))))))
248 (let ((*policy* (process-optimize-decl policy (unless override *policy*)))
249 (*policy-restrictions* (unless override *policy-restrictions*)))
253 ;;; Is NAME something that no conforming program can rely on
255 (defun name-reserved-by-ansi-p (name kind)
258 (eq (symbol-package (fun-name-block-name name))
261 (let ((symbol (typecase name
263 ((cons symbol) (car name))
264 (t (return-from name-reserved-by-ansi-p nil)))))
265 (eq (symbol-package symbol) *cl-package*)))))
267 ;;; This is to be called at the end of a compilation unit. It signals
268 ;;; any residual warnings about unknown stuff, then prints the total
269 ;;; error counts. ABORT-P should be true when the compilation unit was
270 ;;; aborted by throwing out. ABORT-COUNT is the number of dynamically
271 ;;; enclosed nested compilation units that were aborted.
272 (defun summarize-compilation-unit (abort-p)
275 (handler-bind ((style-warning #'compiler-style-warning-handler)
276 (warning #'compiler-warning-handler))
278 (let ((undefs (sort *undefined-warnings* #'string<
280 (let ((x (undefined-warning-name x)))
283 (prin1-to-string x)))))))
284 (dolist (kind '(:variable :function :type))
285 (let ((names (mapcar #'undefined-warning-name
286 (remove kind undefs :test #'neq
287 :key #'undefined-warning-kind))))
288 (when names (push (cons kind names) summary))))
289 (dolist (undef undefs)
290 (let ((name (undefined-warning-name undef))
291 (kind (undefined-warning-kind undef))
292 (warnings (undefined-warning-warnings undef))
293 (undefined-warning-count (undefined-warning-count undef)))
294 (dolist (*compiler-error-context* warnings)
295 (if #-sb-xc-host (and (member kind '(:function :type))
296 (name-reserved-by-ansi-p name kind)
297 *flame-on-necessarily-undefined-thing*)
304 "~@<There is no function named ~S. References to ~S ~
305 in some contexts (like starts of blocks) have ~
306 special meaning, but here it would have to be a ~
307 function, and that shouldn't be right.~:@>" name
311 "~@<The function ~S is undefined, and its name is ~
312 reserved by ANSI CL so that even if it were ~
313 defined later, the code doing so would not be ~
314 portable.~:@>" name))))
316 (if (and (consp name) (eq 'quote (car name)))
318 "~@<Undefined type ~S. The name starts with ~S: ~
319 probably use of a quoted type name in a context ~
320 where the name is not evaluated.~:@>"
323 "~@<Undefined type ~S. Note that name ~S is ~
324 reserved by ANSI CL, so code defining a type with ~
325 that name would not be portable.~:@>" name
327 (if (eq kind :variable)
328 (compiler-warn "undefined ~(~A~): ~S" kind name)
329 (compiler-style-warn "undefined ~(~A~): ~S" kind name))))
330 (let ((warn-count (length warnings)))
331 (when (and warnings (> undefined-warning-count warn-count))
332 (let ((more (- undefined-warning-count warn-count)))
333 (if (eq kind :variable)
335 "~W more use~:P of undefined ~(~A~) ~S"
338 "~W more use~:P of undefined ~(~A~) ~S"
339 more kind name))))))))))
341 (unless (and (not abort-p)
342 (zerop *aborted-compilation-unit-count*)
343 (zerop *compiler-error-count*)
344 (zerop *compiler-warning-count*)
345 (zerop *compiler-style-warning-count*)
346 (zerop *compiler-note-count*))
347 (pprint-logical-block (*error-output* nil :per-line-prefix "; ")
348 (format *error-output* "~&compilation unit ~:[finished~;aborted~]"
350 (dolist (cell summary)
351 (destructuring-bind (kind &rest names) cell
352 (format *error-output*
353 "~& Undefined ~(~A~)~p:~
354 ~% ~{~<~% ~1:;~S~>~^ ~}"
355 kind (length names) names)))
356 (format *error-output* "~[~:;~:*~& caught ~W fatal ERROR condition~:P~]~
357 ~[~:;~:*~& caught ~W ERROR condition~:P~]~
358 ~[~:;~:*~& caught ~W WARNING condition~:P~]~
359 ~[~:;~:*~& caught ~W STYLE-WARNING condition~:P~]~
360 ~[~:;~:*~& printed ~W note~:P~]"
361 *aborted-compilation-unit-count*
362 *compiler-error-count*
363 *compiler-warning-count*
364 *compiler-style-warning-count*
365 *compiler-note-count*))
366 (terpri *error-output*)
367 (force-output *error-output*))))
369 ;;; Evaluate BODY, then return (VALUES BODY-VALUE WARNINGS-P
370 ;;; FAILURE-P), where BODY-VALUE is the first value of the body, and
371 ;;; WARNINGS-P and FAILURE-P are as in CL:COMPILE or CL:COMPILE-FILE.
372 ;;; This also wraps up WITH-IR1-NAMESPACE functionality.
373 (defmacro with-compilation-values (&body body)
374 ;; These bindings could just as well be in WITH-IR1-NAMESPACE, but
375 ;; since they're primarily debugging tools, it's nicer to have
376 ;; a wider unique scope by ID.
377 `(let ((*continuation-number* 0)
378 (*continuation-numbers* (make-hash-table :test 'eq))
379 (*number-continuations* (make-hash-table :test 'eql))
381 (*tn-ids* (make-hash-table :test 'eq))
382 (*id-tns* (make-hash-table :test 'eql))
384 (*label-ids* (make-hash-table :test 'eq))
385 (*id-labels* (make-hash-table :test 'eql)))
387 (let ((*warnings-p* nil)
389 (handler-bind ((compiler-error #'compiler-error-handler)
390 (style-warning #'compiler-style-warning-handler)
391 (warning #'compiler-warning-handler))
392 (values (progn ,@body)
397 (clrhash *continuation-numbers*)
398 (clrhash *number-continuations*)
399 (clrhash *label-ids*)
400 (clrhash *id-labels*))))
402 ;;;; component compilation
404 (defparameter *max-optimize-iterations* 3 ; ARB
406 "The upper limit on the number of times that we will consecutively do IR1
407 optimization that doesn't introduce any new code. A finite limit is
408 necessary, since type inference may take arbitrarily long to converge.")
410 (defevent ir1-optimize-until-done "IR1-OPTIMIZE-UNTIL-DONE called")
411 (defevent ir1-optimize-maxed-out "hit *MAX-OPTIMIZE-ITERATIONS* limit")
413 ;;; Repeatedly optimize COMPONENT until no further optimizations can
414 ;;; be found or we hit our iteration limit. When we hit the limit, we
415 ;;; clear the component and block REOPTIMIZE flags to discourage the
416 ;;; next optimization attempt from pounding on the same code.
417 (defun ir1-optimize-until-done (component)
418 (declare (type component component))
420 (event ir1-optimize-until-done)
422 (cleared-reanalyze nil)
425 (when (component-reanalyze component)
427 (setq cleared-reanalyze t)
428 (setf (component-reanalyze component) nil))
429 (setf (component-reoptimize component) nil)
430 (ir1-optimize component fastp)
431 (cond ((component-reoptimize component)
433 (when (and (>= count *max-optimize-iterations*)
434 (not (component-reanalyze component))
435 (eq (component-reoptimize component) :maybe))
437 (cond ((retry-delayed-ir1-transforms :optimize)
441 (event ir1-optimize-maxed-out)
442 (setf (component-reoptimize component) nil)
443 (do-blocks (block component)
444 (setf (block-reoptimize block) nil))
446 ((retry-delayed-ir1-transforms :optimize)
452 (setq fastp (>= count *max-optimize-iterations*))
453 (maybe-mumble (if fastp "-" ".")))
454 (when cleared-reanalyze
455 (setf (component-reanalyze component) t)))
458 (defparameter *constraint-propagate* t)
460 ;;; KLUDGE: This was bumped from 5 to 10 in a DTC patch ported by MNA
461 ;;; from CMU CL into sbcl-0.6.11.44, the same one which allowed IR1
462 ;;; transforms to be delayed. Either DTC or MNA or both didn't explain
463 ;;; why, and I don't know what the rationale was. -- WHN 2001-04-28
465 ;;; FIXME: It would be good to document why it's important to have a
466 ;;; large value here, and what the drawbacks of an excessively large
467 ;;; value are; and it might also be good to make it depend on
468 ;;; optimization policy.
469 (defparameter *reoptimize-after-type-check-max* 10)
471 (defevent reoptimize-maxed-out
472 "*REOPTIMIZE-AFTER-TYPE-CHECK-MAX* exceeded.")
474 ;;; Iterate doing FIND-DFO until no new dead code is discovered.
475 (defun dfo-as-needed (component)
476 (declare (type component component))
477 (when (component-reanalyze component)
481 (unless (component-reanalyze component)
487 ;;; Do all the IR1 phases for a non-top-level component.
488 (defun ir1-phases (component)
489 (declare (type component component))
490 (aver-live-component component)
491 (let ((*constraint-universe* (make-array 64 ; arbitrary, but don't
493 :fill-pointer 0 :adjustable t))
495 (*delayed-ir1-transforms* nil))
496 (declare (special *constraint-universe* *delayed-ir1-transforms*))
498 (ir1-optimize-until-done component)
499 (when (or (component-new-functionals component)
500 (component-reanalyze-functionals component))
501 (maybe-mumble "locall ")
502 (locall-analyze-component component))
503 (dfo-as-needed component)
504 (when *constraint-propagate*
505 (maybe-mumble "constraint ")
506 (constraint-propagate component))
507 (when (retry-delayed-ir1-transforms :constraint)
508 (maybe-mumble "Rtran "))
509 (flet ((want-reoptimization-p ()
510 (or (component-reoptimize component)
511 (component-reanalyze component)
512 (component-new-functionals component)
513 (component-reanalyze-functionals component))))
514 (unless (and (want-reoptimization-p)
515 ;; We delay the generation of type checks until
516 ;; the type constraints have had time to
517 ;; propagate, else the compiler can confuse itself.
518 (< loop-count (- *reoptimize-after-type-check-max* 4)))
519 (maybe-mumble "type ")
520 (generate-type-checks component)
521 (unless (want-reoptimization-p)
523 (when (>= loop-count *reoptimize-after-type-check-max*)
524 (maybe-mumble "[reoptimize limit]")
525 (event reoptimize-maxed-out)
529 (when *check-consistency*
530 (do-blocks-backwards (block component)
531 (awhen (flush-dead-code block)
532 (let ((*compiler-error-context* it))
533 (compiler-warn "dead code detected at the end of ~S"
536 (ir1-finalize component)
539 (defun %compile-component (component)
540 (let ((*code-segment* nil)
543 (*constant-segment* nil)
545 (*constant-table* nil)
547 (*constant-vector* nil))
548 (maybe-mumble "GTN ")
549 (gtn-analyze component)
550 (maybe-mumble "LTN ")
551 (ltn-analyze component)
552 (dfo-as-needed component)
553 (maybe-mumble "control ")
554 (control-analyze component #'make-ir2-block)
556 (when (or (ir2-component-values-receivers (component-info component))
557 (component-dx-lvars component))
558 (maybe-mumble "stack ")
559 (stack-analyze component)
560 ;; Assign BLOCK-NUMBER for any cleanup blocks introduced by
561 ;; stack analysis. There shouldn't be any unreachable code after
562 ;; control, so this won't delete anything.
563 (dfo-as-needed component))
567 (maybe-mumble "IR2tran ")
569 (entry-analyze component)
570 (ir2-convert component)
572 (when (policy *lexenv* (>= speed compilation-speed))
573 (maybe-mumble "copy ")
574 (copy-propagate component))
576 (ir2-optimize component)
578 (select-representations component)
580 (when *check-consistency*
581 (maybe-mumble "check2 ")
582 (check-ir2-consistency component))
584 (delete-unreferenced-tns component)
586 (maybe-mumble "life ")
587 (lifetime-analyze component)
589 (when *compile-progress*
590 (compiler-mumble "") ; Sync before doing more output.
591 (pre-pack-tn-stats component *standard-output*))
593 (when *check-consistency*
594 (maybe-mumble "check-life ")
595 (check-life-consistency component))
597 (maybe-mumble "pack ")
600 (when *check-consistency*
601 (maybe-mumble "check-pack ")
602 (check-pack-consistency component))
604 (when *compiler-trace-output*
605 (describe-component component *compiler-trace-output*)
606 (describe-ir2-component component *compiler-trace-output*))
608 (maybe-mumble "code ")
609 (multiple-value-bind (code-length trace-table fixup-notes)
610 (generate-code component)
613 (when *compiler-trace-output*
614 (format *compiler-trace-output*
615 "~|~%disassembly of code for ~S~2%" component)
616 (sb!disassem:disassemble-assem-segment *code-segment*
617 *compiler-trace-output*))
619 (etypecase *compile-object*
621 (maybe-mumble "fasl")
622 (fasl-dump-component component
629 (maybe-mumble "core")
630 (make-core-component component
638 ;; We're done, so don't bother keeping anything around.
639 (setf (component-info component) :dead)
643 ;;; Delete components with no external entry points before we try to
644 ;;; generate code. Unreachable closures can cause IR2 conversion to
645 ;;; puke on itself, since it is the reference to the closure which
646 ;;; normally causes the components to be combined.
647 (defun delete-if-no-entries (component)
648 (dolist (fun (component-lambdas component) (delete-component component))
649 (when (functional-has-external-references-p fun)
651 (case (functional-kind fun)
654 (unless (every (lambda (ref)
655 (eq (node-component ref) component))
659 (defun compile-component (component)
661 ;; miscellaneous sanity checks
663 ;; FIXME: These are basically pretty wimpy compared to the checks done
664 ;; by the old CHECK-IR1-CONSISTENCY code. It would be really nice to
665 ;; make those internal consistency checks work again and use them.
666 (aver-live-component component)
667 (do-blocks (block component)
668 (aver (eql (block-component block) component)))
669 (dolist (lambda (component-lambdas component))
670 ;; sanity check to prevent weirdness from propagating insidiously as
671 ;; far from its root cause as it did in bug 138: Make sure that
672 ;; thing-to-COMPONENT links are consistent.
673 (aver (eql (lambda-component lambda) component))
674 (aver (eql (node-component (lambda-bind lambda)) component)))
676 (let* ((*component-being-compiled* component))
678 ;; Record xref information before optimization. This way the
679 ;; stored xref data reflects the real source as closely as
681 (record-component-xrefs component)
683 (ir1-phases component)
686 (dfo-as-needed component)
687 (find-dominators component)
688 (loop-analyze component))
691 (when (and *loop-analyze* *compiler-trace-output*)
692 (labels ((print-blocks (block)
693 (format *compiler-trace-output* " ~A~%" block)
694 (when (block-loop-next block)
695 (print-blocks (block-loop-next block))))
697 (format *compiler-trace-output* "loop=~A~%" loop)
698 (print-blocks (loop-blocks loop))
699 (dolist (l (loop-inferiors loop))
701 (print-loop (component-outer-loop component))))
704 ;; FIXME: What is MAYBE-MUMBLE for? Do we need it any more?
705 (maybe-mumble "env ")
706 (physenv-analyze component)
707 (dfo-as-needed component)
709 (delete-if-no-entries component)
711 (unless (eq (block-next (component-head component))
712 (component-tail component))
713 (%compile-component component)))
715 (clear-constant-info)
719 ;;;; clearing global data structures
721 ;;;; FIXME: Is it possible to get rid of this stuff, getting rid of
722 ;;;; global data structures entirely when possible and consing up the
723 ;;;; others from scratch instead of clearing and reusing them?
725 ;;; Clear the INFO in constants in the *FREE-VARS*, etc. In
726 ;;; addition to allowing stuff to be reclaimed, this is required for
727 ;;; correct assignment of constant offsets, since we need to assign a
728 ;;; new offset for each component. We don't clear the FUNCTIONAL-INFO
729 ;;; slots, since they are used to keep track of functions across
730 ;;; component boundaries.
731 (defun clear-constant-info ()
732 (maphash (lambda (k v)
734 (setf (leaf-info v) nil)
735 (setf (constant-boxed-tn v) nil))
737 (maphash (lambda (k v)
740 (setf (leaf-info v) nil)
741 (setf (constant-boxed-tn v) nil)))
745 ;;; Blow away the REFS for all global variables, and let COMPONENT
747 (defun clear-ir1-info (component)
748 (declare (type component component))
750 (maphash (lambda (k v)
754 (delete-if #'here-p (leaf-refs v)))
755 (when (basic-var-p v)
756 (setf (basic-var-sets v)
757 (delete-if #'here-p (basic-var-sets v))))))
760 (eq (node-component x) component)))
768 ;;; Print out some useful info about COMPONENT to STREAM.
769 (defun describe-component (component *standard-output*)
770 (declare (type component component))
771 (format t "~|~%;;;; component: ~S~2%" (component-name component))
772 (print-all-blocks component)
775 (defun describe-ir2-component (component *standard-output*)
776 (format t "~%~|~%;;;; IR2 component: ~S~2%" (component-name component))
777 (format t "entries:~%")
778 (dolist (entry (ir2-component-entries (component-info component)))
779 (format t "~4TL~D: ~S~:[~; [closure]~]~%"
780 (label-id (entry-info-offset entry))
781 (entry-info-name entry)
782 (entry-info-closure-tn entry)))
784 (pre-pack-tn-stats component *standard-output*)
786 (print-ir2-blocks component)
792 ;;;; When reading from a file, we have to keep track of some source
793 ;;;; information. We also exploit our ability to back up for printing
794 ;;;; the error context and for recovering from errors.
796 ;;;; The interface we provide to this stuff is the stream-oid
797 ;;;; SOURCE-INFO structure. The bookkeeping is done as a side effect
798 ;;;; of getting the next source form.
800 ;;; A FILE-INFO structure holds all the source information for a
802 (def!struct (file-info
804 #-no-ansi-print-object
805 (:print-object (lambda (s stream)
806 (print-unreadable-object (s stream :type t)
807 (princ (file-info-name s) stream)))))
808 ;; If a file, the truename of the corresponding source file. If from
809 ;; a Lisp form, :LISP. If from a stream, :STREAM.
810 (name (missing-arg) :type (or pathname (eql :lisp)))
811 ;; the external format that we'll call OPEN with, if NAME is a file.
812 (external-format nil)
813 ;; the defaulted, but not necessarily absolute file name (i.e. prior
814 ;; to TRUENAME call.) Null if not a file. This is used to set
815 ;; *COMPILE-FILE-PATHNAME*, and if absolute, is dumped in the
817 (untruename nil :type (or pathname null))
818 ;; the file's write date (if relevant)
819 (write-date nil :type (or unsigned-byte null))
820 ;; the source path root number of the first form in this file (i.e.
821 ;; the total number of forms converted previously in this
823 (source-root 0 :type unsigned-byte)
824 ;; parallel vectors containing the forms read out of the file and
825 ;; the file positions that reading of each form started at (i.e. the
826 ;; end of the previous form)
827 (forms (make-array 10 :fill-pointer 0 :adjustable t) :type (vector t))
828 (positions (make-array 10 :fill-pointer 0 :adjustable t) :type (vector t)))
830 ;;; The SOURCE-INFO structure provides a handle on all the source
831 ;;; information for an entire compilation.
832 (def!struct (source-info
833 #-no-ansi-print-object
834 (:print-object (lambda (s stream)
835 (print-unreadable-object (s stream :type t))))
837 ;; the UT that compilation started at
838 (start-time (get-universal-time) :type unsigned-byte)
839 ;; the IRT that compilation started at
840 (start-real-time (get-internal-real-time) :type unsigned-byte)
841 ;; the FILE-INFO structure for this compilation
842 (file-info nil :type (or file-info null))
843 ;; the stream that we are using to read the FILE-INFO, or NIL if
844 ;; no stream has been opened yet
845 (stream nil :type (or stream null))
846 ;; if the current compilation is recursive (e.g., due to EVAL-WHEN
847 ;; processing at compile-time), the invoking compilation's
849 (parent nil :type (or source-info null)))
851 ;;; Given a pathname, return a SOURCE-INFO structure.
852 (defun make-file-source-info (file external-format)
854 :file-info (make-file-info :name (truename file)
855 :untruename (merge-pathnames file)
856 :external-format external-format
857 :write-date (file-write-date file))))
859 ;;; Return a SOURCE-INFO to describe the incremental compilation of FORM.
860 (defun make-lisp-source-info (form &key parent)
862 :file-info (make-file-info :name :lisp
867 ;;; Walk up the SOURCE-INFO list until we either reach a SOURCE-INFO
868 ;;; with no parent (e.g., from a REPL evaluation) or until we reach a
869 ;;; SOURCE-INFO whose FILE-INFO denotes a file.
870 (defun get-toplevelish-file-info (&optional (source-info *source-info*))
872 (do* ((sinfo source-info (source-info-parent sinfo))
873 (finfo (source-info-file-info sinfo)
874 (source-info-file-info sinfo)))
875 ((or (not (source-info-p (source-info-parent sinfo)))
876 (pathnamep (file-info-name finfo)))
879 ;;; Return a form read from STREAM; or for EOF use the trick,
880 ;;; popularized by Kent Pitman, of returning STREAM itself. If an
881 ;;; error happens, then convert it to standard abort-the-compilation
882 ;;; error condition (possibly recording some extra location
884 (defun read-for-compile-file (stream position)
886 (read-preserving-whitespace stream nil stream)
887 (reader-error (condition)
888 (compiler-error 'input-error-in-compile-file
889 ;; We don't need to supply :POSITION here because
890 ;; READER-ERRORs already know their position in the file.
893 ;; ANSI, in its wisdom, says that READ should return END-OF-FILE
894 ;; (and that this is not a READER-ERROR) when it encounters end of
895 ;; file in the middle of something it's trying to read.
896 (end-of-file (condition)
897 (compiler-error 'input-error-in-compile-file
899 ;; We need to supply :POSITION here because the END-OF-FILE
900 ;; condition doesn't carry the position that the user
901 ;; probably cares about, where the failed READ began.
905 (compiler-error 'input-error-in-compile-file
910 ;;; If STREAM is present, return it, otherwise open a stream to the
911 ;;; current file. There must be a current file.
913 ;;; FIXME: This is probably an unnecessarily roundabout way to do
914 ;;; things now that we process a single file in COMPILE-FILE (unlike
915 ;;; the old CMU CL code, which accepted multiple files). Also, the old
917 ;;; When we open a new file, we also reset *PACKAGE* and policy.
918 ;;; This gives the effect of rebinding around each file.
919 ;;; which doesn't seem to be true now. Check to make sure that if
920 ;;; such rebinding is necessary, it's still done somewhere.
921 (defun get-source-stream (info)
922 (declare (type source-info info))
923 (or (source-info-stream info)
924 (let* ((file-info (source-info-file-info info))
925 (name (file-info-name file-info))
926 (external-format (file-info-external-format file-info)))
927 (setf sb!xc:*compile-file-truename* name
928 sb!xc:*compile-file-pathname* (file-info-untruename file-info)
929 (source-info-stream info)
930 (open name :direction :input
931 :external-format external-format)))))
933 ;;; Close the stream in INFO if it is open.
934 (defun close-source-info (info)
935 (declare (type source-info info))
936 (let ((stream (source-info-stream info)))
937 (when stream (close stream)))
938 (setf (source-info-stream info) nil)
941 ;;; Loop over FORMS retrieved from INFO. Used by COMPILE-FILE and
942 ;;; LOAD when loading from a FILE-STREAM associated with a source
944 (defmacro do-forms-from-info (((form &rest keys) info)
946 (aver (symbolp form))
947 (once-only ((info info))
948 `(let ((*source-info* ,info))
949 (loop (destructuring-bind (,form &key ,@keys &allow-other-keys)
950 (let* ((file-info (source-info-file-info ,info))
951 (stream (get-source-stream ,info))
952 (pos (file-position stream))
953 (form (read-for-compile-file stream pos)))
954 (if (eq form stream) ; i.e., if EOF
956 (let* ((forms (file-info-forms file-info))
957 (current-idx (+ (fill-pointer forms)
958 (file-info-source-root
960 (vector-push-extend form forms)
961 (vector-push-extend pos (file-info-positions
963 (list form :current-index current-idx))))
966 ;;; Read and compile the source file.
967 (defun sub-sub-compile-file (info)
968 (do-forms-from-info ((form current-index) info)
970 (find-source-paths form current-index)
971 (process-toplevel-form
972 form `(original-source-start 0 ,current-index) nil))))
974 ;;; Return the INDEX'th source form read from INFO and the position
975 ;;; where it was read.
976 (defun find-source-root (index info)
977 (declare (type index index) (type source-info info))
978 (let ((file-info (source-info-file-info info)))
979 (values (aref (file-info-forms file-info) index)
980 (aref (file-info-positions file-info) index))))
982 ;;;; processing of top level forms
984 ;;; This is called by top level form processing when we are ready to
985 ;;; actually compile something. If *BLOCK-COMPILE* is T, then we still
986 ;;; convert the form, but delay compilation, pushing the result on
987 ;;; *TOPLEVEL-LAMBDAS* instead.
988 (defun convert-and-maybe-compile (form path)
989 (declare (list path))
990 (let ((*top-level-form-noted* (note-top-level-form form t)))
991 ;; Don't bother to compile simple objects that just sit there.
992 (when (and form (or (symbolp form) (consp form)))
993 (if (fopcompilable-p form)
994 (let ((*fopcompile-label-counter* 0))
995 (fopcompile form path nil))
997 (let ((*lexenv* (make-lexenv
999 :handled-conditions *handled-conditions*
1000 :disabled-package-locks *disabled-package-locks*))
1001 (tll (ir1-toplevel form path nil)))
1002 (if (eq *block-compile* t)
1003 (push tll *toplevel-lambdas*)
1004 (compile-toplevel (list tll) nil))
1007 ;;; Macroexpand FORM in the current environment with an error handler.
1008 ;;; We only expand one level, so that we retain all the intervening
1009 ;;; forms in the source path.
1010 (defun preprocessor-macroexpand-1 (form)
1011 (handler-case (%macroexpand-1 form *lexenv*)
1013 (compiler-error "(during macroexpansion of ~A)~%~A"
1014 (let ((*print-level* 2)
1016 (format nil "~S" form))
1019 ;;; Process a PROGN-like portion of a top level form. FORMS is a list of
1020 ;;; the forms, and PATH is the source path of the FORM they came out of.
1021 ;;; COMPILE-TIME-TOO is as in ANSI "3.2.3.1 Processing of Top Level Forms".
1022 (defun process-toplevel-progn (forms path compile-time-too)
1023 (declare (list forms) (list path))
1024 (dolist (form forms)
1025 (process-toplevel-form form path compile-time-too)))
1027 ;;; Process a top level use of LOCALLY, or anything else (e.g.
1028 ;;; MACROLET) at top level which has declarations and ordinary forms.
1029 ;;; We parse declarations and then recursively process the body.
1030 (defun process-toplevel-locally (body path compile-time-too &key vars funs)
1031 (declare (list path))
1032 (multiple-value-bind (forms decls)
1033 (parse-body body :doc-string-allowed nil :toplevel t)
1035 (let* ((*lexenv* (process-decls decls vars funs))
1036 ;; FIXME: VALUES declaration
1038 ;; Binding *POLICY* is pretty much of a hack, since it
1039 ;; causes LOCALLY to "capture" enclosed proclamations. It
1040 ;; is necessary because CONVERT-AND-MAYBE-COMPILE uses the
1041 ;; value of *POLICY* as the policy. The need for this hack
1042 ;; is due to the quirk that there is no way to represent in
1043 ;; a POLICY that an optimize quality came from the default.
1045 ;; FIXME: Ideally, something should be done so that DECLAIM
1046 ;; inside LOCALLY works OK. Failing that, at least we could
1047 ;; issue a warning instead of silently screwing up.
1048 (*policy* (lexenv-policy *lexenv*))
1049 ;; This is probably also a hack
1050 (*handled-conditions* (lexenv-handled-conditions *lexenv*))
1052 (*disabled-package-locks* (lexenv-disabled-package-locks *lexenv*)))
1053 (process-toplevel-progn forms path compile-time-too)))))
1055 ;;; Parse an EVAL-WHEN situations list, returning three flags,
1056 ;;; (VALUES COMPILE-TOPLEVEL LOAD-TOPLEVEL EXECUTE), indicating
1057 ;;; the types of situations present in the list.
1058 (defun parse-eval-when-situations (situations)
1059 (when (or (not (listp situations))
1060 (set-difference situations
1067 (compiler-error "bad EVAL-WHEN situation list: ~S" situations))
1068 (let ((deprecated-names (intersection situations '(compile load eval))))
1069 (when deprecated-names
1070 (style-warn "using deprecated EVAL-WHEN situation names~{ ~S~}"
1072 (values (intersection '(:compile-toplevel compile)
1074 (intersection '(:load-toplevel load) situations)
1075 (intersection '(:execute eval) situations)))
1078 ;;; utilities for extracting COMPONENTs of FUNCTIONALs
1079 (defun functional-components (f)
1080 (declare (type functional f))
1082 (clambda (list (lambda-component f)))
1083 (optional-dispatch (let ((result nil))
1084 (flet ((maybe-frob (maybe-clambda)
1085 (when (and maybe-clambda
1086 (promise-ready-p maybe-clambda))
1087 (pushnew (lambda-component
1088 (force maybe-clambda))
1090 (map nil #'maybe-frob (optional-dispatch-entry-points f))
1091 (maybe-frob (optional-dispatch-more-entry f))
1092 (maybe-frob (optional-dispatch-main-entry f)))
1095 (defun make-functional-from-toplevel-lambda (lambda-expression
1099 ;; I'd thought NIL should
1100 ;; work, but it doesn't.
1101 ;; -- WHN 2001-09-20
1103 (let* ((*current-path* path)
1104 (component (make-empty-component))
1105 (*current-component* component)
1106 (debug-name-tail (or name (name-lambdalike lambda-expression)))
1107 (source-name (or name '.anonymous.)))
1108 (setf (component-name component) (debug-name 'initial-component debug-name-tail)
1109 (component-kind component) :initial)
1110 (let* ((fun (let ((*allow-instrumenting* t))
1111 (funcall #'ir1-convert-lambdalike
1113 :source-name source-name)))
1114 ;; Convert the XEP using the policy of the real function. Otherwise
1115 ;; the wrong policy will be used for deciding whether to type-check
1116 ;; the parameters of the real function (via CONVERT-CALL /
1117 ;; PROPAGATE-TO-ARGS). -- JES, 2007-02-27
1118 (*lexenv* (make-lexenv :policy (lexenv-policy (functional-lexenv fun))))
1119 (xep (ir1-convert-lambda (make-xep-lambda-expression fun)
1120 :source-name source-name
1121 :debug-name (debug-name 'tl-xep debug-name-tail)
1124 (assert-global-function-definition-type name fun))
1125 (setf (functional-kind xep) :external
1126 (functional-entry-fun xep) fun
1127 (functional-entry-fun fun) xep
1128 (component-reanalyze component) t
1129 (functional-has-external-references-p xep) t)
1130 (reoptimize-component component :maybe)
1131 (locall-analyze-xep-entry-point fun)
1132 ;; Any leftover REFs to FUN outside local calls get replaced with the
1134 (substitute-leaf-if (lambda (ref)
1135 (let* ((lvar (ref-lvar ref))
1136 (dest (when lvar (lvar-dest lvar)))
1137 (kind (when (basic-combination-p dest)
1138 (basic-combination-kind dest))))
1144 ;;; Compile LAMBDA-EXPRESSION into *COMPILE-OBJECT*, returning a
1145 ;;; description of the result.
1146 ;;; * If *COMPILE-OBJECT* is a CORE-OBJECT, then write the function
1147 ;;; into core and return the compiled FUNCTION value.
1148 ;;; * If *COMPILE-OBJECT* is a fasl file, then write the function
1149 ;;; into the fasl file and return a dump handle.
1151 ;;; If NAME is provided, then we try to use it as the name of the
1152 ;;; function for debugging/diagnostic information.
1153 (defun %compile (lambda-expression
1158 ;; This magical idiom seems to be the appropriate
1159 ;; path for compiling standalone LAMBDAs, judging
1160 ;; from the CMU CL code and experiment, so it's a
1161 ;; nice default for things where we don't have a
1162 ;; real source path (as in e.g. inside CL:COMPILE).
1163 '(original-source-start 0 0)))
1165 (legal-fun-name-or-type-error name))
1167 (let* ((*lexenv* (make-lexenv
1169 :handled-conditions *handled-conditions*
1170 :disabled-package-locks *disabled-package-locks*))
1171 (*compiler-sset-counter* 0)
1172 (fun (make-functional-from-toplevel-lambda lambda-expression
1176 ;; FIXME: The compile-it code from here on is sort of a
1177 ;; twisted version of the code in COMPILE-TOPLEVEL. It'd be
1178 ;; better to find a way to share the code there; or
1179 ;; alternatively, to use this code to replace the code there.
1180 ;; (The second alternative might be pretty easy if we used
1181 ;; the :LOCALL-ONLY option to IR1-FOR-LAMBDA. Then maybe the
1182 ;; whole FUNCTIONAL-KIND=:TOPLEVEL case could go away..)
1184 (locall-analyze-clambdas-until-done (list fun))
1186 (let ((components-from-dfo (find-initial-dfo (list fun))))
1187 (dolist (component-from-dfo components-from-dfo)
1188 (compile-component component-from-dfo)
1189 (replace-toplevel-xeps component-from-dfo))
1191 (let ((entry-table (etypecase *compile-object*
1192 (fasl-output (fasl-output-entry-table
1194 (core-object (core-object-entry-table
1195 *compile-object*)))))
1196 (multiple-value-bind (result found-p)
1197 (gethash (leaf-info fun) entry-table)
1201 ;; KLUDGE: This code duplicates some other code in this
1202 ;; file. In the great reorganzation, the flow of program
1203 ;; logic changed from the original CMUCL model, and that
1204 ;; path (as of sbcl-0.7.5 in SUB-COMPILE-FILE) was no
1205 ;; longer followed for CORE-OBJECTS, leading to BUG
1206 ;; 156. This place is transparently not the right one for
1207 ;; this code, but I don't have a clear enough overview of
1208 ;; the compiler to know how to rearrange it all so that
1209 ;; this operation fits in nicely, and it was blocking
1210 ;; reimplementation of (DECLAIM (INLINE FOO)) (MACROLET
1211 ;; ((..)) (DEFUN FOO ...))
1213 ;; FIXME: This KLUDGE doesn't solve all the problem in an
1214 ;; ideal way, as (1) definitions typed in at the REPL
1215 ;; without an INLINE declaration will give a NULL
1216 ;; FUNCTION-LAMBDA-EXPRESSION (allowable, but not ideal)
1217 ;; and (2) INLINE declarations will yield a
1218 ;; FUNCTION-LAMBDA-EXPRESSION headed by
1219 ;; SB-C:LAMBDA-WITH-LEXENV, even for null LEXENV. -- CSR,
1222 ;; (2) is probably fairly easy to fix -- it is, after all,
1223 ;; a matter of list manipulation (or possibly of teaching
1224 ;; CL:FUNCTION about SB-C:LAMBDA-WITH-LEXENV). (1) is
1225 ;; significantly harder, as the association between
1226 ;; function object and source is a tricky one.
1228 ;; FUNCTION-LAMBDA-EXPRESSION "works" (i.e. returns a
1229 ;; non-NULL list) when the function in question has been
1230 ;; compiled by (COMPILE <x> '(LAMBDA ...)); it does not
1231 ;; work when it has been compiled as part of the top-level
1232 ;; EVAL strategy of compiling everything inside (LAMBDA ()
1233 ;; ...). -- CSR, 2002-11-02
1234 (when (core-object-p *compile-object*)
1235 (fix-core-source-info *source-info* *compile-object* result))
1237 (mapc #'clear-ir1-info components-from-dfo))))))))
1239 (defun process-toplevel-cold-fset (name lambda-expression path)
1240 (unless (producing-fasl-file)
1241 (error "can't COLD-FSET except in a fasl file"))
1242 (legal-fun-name-or-type-error name)
1243 (fasl-dump-cold-fset name
1244 (%compile lambda-expression
1251 (defun note-top-level-form (form &optional finalp)
1252 (when *compile-print*
1253 (cond ((not *top-level-form-noted*)
1254 (let ((*print-length* 2)
1256 (*print-pretty* nil))
1257 (with-compiler-io-syntax
1259 #-sb-xc-host "~&; ~:[compiling~;converting~] ~S"
1260 #+sb-xc-host "~&; ~:[x-compiling~;x-converting~] ~S"
1261 *block-compile* form)))
1264 (eq :top-level-forms *compile-print*)
1265 (neq form *top-level-form-noted*))
1266 (let ((*print-length* 1)
1268 (*print-pretty* nil))
1269 (with-compiler-io-syntax
1270 (compiler-mumble "~&; ... top level ~S" form)))
1273 *top-level-form-noted*))))
1275 ;;; Handle the evaluation the a :COMPILE-TOPLEVEL body during
1276 ;;; compilation. Normally just evaluate in the appropriate
1277 ;;; environment, but also compile if outputting a CFASL.
1278 (defun eval-compile-toplevel (body path)
1279 (eval-tlf `(progn ,@body) (source-path-tlf-number path) *lexenv*)
1280 (when *compile-toplevel-object*
1281 (let ((*compile-object* *compile-toplevel-object*))
1282 (convert-and-maybe-compile `(progn ,@body) path))))
1284 ;;; Process a top level FORM with the specified source PATH.
1285 ;;; * If this is a magic top level form, then do stuff.
1286 ;;; * If this is a macro, then expand it.
1287 ;;; * Otherwise, just compile it.
1289 ;;; COMPILE-TIME-TOO is as defined in ANSI
1290 ;;; "3.2.3.1 Processing of Top Level Forms".
1291 (defun process-toplevel-form (form path compile-time-too)
1292 (declare (list path))
1294 (catch 'process-toplevel-form-error-abort
1295 (let* ((path (or (get-source-path form) (cons form path)))
1296 (*current-path* path)
1297 (*compiler-error-bailout*
1298 (lambda (&optional condition)
1299 (convert-and-maybe-compile
1300 (make-compiler-error-form condition form)
1302 (throw 'process-toplevel-form-error-abort nil))))
1304 (flet ((default-processor (form)
1305 (let ((*top-level-form-noted* (note-top-level-form form)))
1306 ;; When we're cross-compiling, consider: what should we
1307 ;; do when we hit e.g.
1308 ;; (EVAL-WHEN (:COMPILE-TOPLEVEL)
1309 ;; (DEFUN FOO (X) (+ 7 X)))?
1310 ;; DEFUN has a macro definition in the cross-compiler,
1311 ;; and a different macro definition in the target
1312 ;; compiler. The only sensible thing is to use the
1313 ;; target compiler's macro definition, since the
1314 ;; cross-compiler's macro is in general into target
1315 ;; functions which can't meaningfully be executed at
1316 ;; cross-compilation time. So make sure we do the EVAL
1317 ;; here, before we macroexpand.
1319 ;; Then things get even dicier with something like
1320 ;; (DEFCONSTANT-EQX SB!XC:LAMBDA-LIST-KEYWORDS ..)
1321 ;; where we have to make sure that we don't uncross
1322 ;; the SB!XC: prefix before we do EVAL, because otherwise
1323 ;; we'd be trying to redefine the cross-compilation host's
1326 ;; (Isn't it fun to cross-compile Common Lisp?:-)
1329 (when compile-time-too
1330 (eval form)) ; letting xc host EVAL do its own macroexpansion
1331 (let* (;; (We uncross the operator name because things
1332 ;; like SB!XC:DEFCONSTANT and SB!XC:DEFTYPE
1333 ;; should be equivalent to their CL: counterparts
1334 ;; when being compiled as target code. We leave
1335 ;; the rest of the form uncrossed because macros
1336 ;; might yet expand into EVAL-WHEN stuff, and
1337 ;; things inside EVAL-WHEN can't be uncrossed
1338 ;; until after we've EVALed them in the
1339 ;; cross-compilation host.)
1340 (slightly-uncrossed (cons (uncross (first form))
1342 (expanded (preprocessor-macroexpand-1
1343 slightly-uncrossed)))
1344 (if (eq expanded slightly-uncrossed)
1345 ;; (Now that we're no longer processing toplevel
1346 ;; forms, and hence no longer need to worry about
1347 ;; EVAL-WHEN, we can uncross everything.)
1348 (convert-and-maybe-compile expanded path)
1349 ;; (We have to demote COMPILE-TIME-TOO to NIL
1350 ;; here, no matter what it was before, since
1351 ;; otherwise we'd tend to EVAL subforms more than
1352 ;; once, because of WHEN COMPILE-TIME-TOO form
1354 (process-toplevel-form expanded path nil))))
1355 ;; When we're not cross-compiling, we only need to
1356 ;; macroexpand once, so we can follow the 1-thru-6
1357 ;; sequence of steps in ANSI's "3.2.3.1 Processing of
1358 ;; Top Level Forms".
1360 (let ((expanded (preprocessor-macroexpand-1 form)))
1361 (cond ((eq expanded form)
1362 (when compile-time-too
1363 (eval-compile-toplevel (list form) path))
1364 (convert-and-maybe-compile form path))
1366 (process-toplevel-form expanded
1368 compile-time-too)))))))
1371 ;; (There are no xc EVAL-WHEN issues in the ATOM case until
1372 ;; (1) SBCL gets smart enough to handle global
1373 ;; DEFINE-SYMBOL-MACRO or SYMBOL-MACROLET and (2) SBCL
1374 ;; implementors start using symbol macros in a way which
1375 ;; interacts with SB-XC/CL distinction.)
1376 (convert-and-maybe-compile form path)
1378 (default-processor form)
1379 (flet ((need-at-least-one-arg (form)
1381 (compiler-error "~S form is too short: ~S"
1385 ;; In the cross-compiler, top level COLD-FSET arranges
1386 ;; for static linking at cold init time.
1389 (aver (not compile-time-too))
1390 (destructuring-bind (cold-fset fun-name lambda-expression) form
1391 (declare (ignore cold-fset))
1392 (process-toplevel-cold-fset fun-name
1395 ((eval-when macrolet symbol-macrolet);things w/ 1 arg before body
1396 (need-at-least-one-arg form)
1397 (destructuring-bind (special-operator magic &rest body) form
1398 (ecase special-operator
1400 ;; CT, LT, and E here are as in Figure 3-7 of ANSI
1401 ;; "3.2.3.1 Processing of Top Level Forms".
1402 (multiple-value-bind (ct lt e)
1403 (parse-eval-when-situations magic)
1404 (let ((new-compile-time-too (or ct
1405 (and compile-time-too
1407 (cond (lt (process-toplevel-progn
1408 body path new-compile-time-too))
1409 (new-compile-time-too
1410 (eval-compile-toplevel body path))))))
1412 (funcall-in-macrolet-lexenv
1414 (lambda (&key funs prepend)
1415 (declare (ignore funs))
1416 (aver (null prepend))
1417 (process-toplevel-locally body
1422 (funcall-in-symbol-macrolet-lexenv
1424 (lambda (&key vars prepend)
1425 (aver (null prepend))
1426 (process-toplevel-locally body
1432 (process-toplevel-locally (rest form) path compile-time-too))
1434 (process-toplevel-progn (rest form) path compile-time-too))
1435 (t (default-processor form))))))))
1439 ;;;; load time value support
1441 ;;;; (See EMIT-MAKE-LOAD-FORM.)
1443 ;;; Return T if we are currently producing a fasl file and hence
1444 ;;; constants need to be dumped carefully.
1445 (defun producing-fasl-file ()
1446 (fasl-output-p *compile-object*))
1448 ;;; Compile FORM and arrange for it to be called at load-time. Return
1449 ;;; the dumper handle and our best guess at the type of the object.
1450 (defun compile-load-time-value (form)
1451 (let ((lambda (compile-load-time-stuff form t)))
1453 (fasl-dump-load-time-value-lambda lambda *compile-object*)
1454 (let ((type (leaf-type lambda)))
1455 (if (fun-type-p type)
1456 (single-value-type (fun-type-returns type))
1459 ;;; Compile the FORMS and arrange for them to be called (for effect,
1460 ;;; not value) at load time.
1461 (defun compile-make-load-form-init-forms (forms)
1462 (let ((lambda (compile-load-time-stuff `(progn ,@forms) nil)))
1463 (fasl-dump-toplevel-lambda-call lambda *compile-object*)))
1465 ;;; Do the actual work of COMPILE-LOAD-TIME-VALUE or
1466 ;;; COMPILE-MAKE-LOAD-FORM-INIT-FORMS.
1467 (defun compile-load-time-stuff (form for-value)
1469 (let* ((*lexenv* (make-null-lexenv))
1470 (lambda (ir1-toplevel form *current-path* for-value nil)))
1471 (compile-toplevel (list lambda) t)
1474 ;;; This is called by COMPILE-TOPLEVEL when it was passed T for
1475 ;;; LOAD-TIME-VALUE-P (which happens in COMPILE-LOAD-TIME-STUFF). We
1476 ;;; don't try to combine this component with anything else and frob
1477 ;;; the name. If not in a :TOPLEVEL component, then don't bother
1478 ;;; compiling, because it was merged with a run-time component.
1479 (defun compile-load-time-value-lambda (lambdas)
1480 (aver (null (cdr lambdas)))
1481 (let* ((lambda (car lambdas))
1482 (component (lambda-component lambda)))
1483 (when (eql (component-kind component) :toplevel)
1484 (setf (component-name component) (leaf-debug-name lambda))
1485 (compile-component component)
1486 (clear-ir1-info component))))
1490 (defun object-call-toplevel-lambda (tll)
1491 (declare (type functional tll))
1492 (let ((object *compile-object*))
1494 (fasl-output (fasl-dump-toplevel-lambda-call tll object))
1495 (core-object (core-call-toplevel-lambda tll object))
1498 ;;; Smash LAMBDAS into a single component, compile it, and arrange for
1499 ;;; the resulting function to be called.
1500 (defun sub-compile-toplevel-lambdas (lambdas)
1501 (declare (list lambdas))
1503 (multiple-value-bind (component tll) (merge-toplevel-lambdas lambdas)
1504 (compile-component component)
1505 (clear-ir1-info component)
1506 (object-call-toplevel-lambda tll)))
1509 ;;; Compile top level code and call the top level lambdas. We pick off
1510 ;;; top level lambdas in non-top-level components here, calling
1511 ;;; SUB-c-t-l-l on each subsequence of normal top level lambdas.
1512 (defun compile-toplevel-lambdas (lambdas)
1513 (declare (list lambdas))
1514 (let ((len (length lambdas)))
1515 (flet ((loser (start)
1516 (or (position-if (lambda (x)
1517 (not (eq (component-kind
1518 (node-component (lambda-bind x)))
1521 ;; this used to read ":start start", but
1522 ;; start can be greater than len, which
1523 ;; is an error according to ANSI - CSR,
1525 :start (min start len))
1527 (do* ((start 0 (1+ loser))
1528 (loser (loser start) (loser start)))
1530 (sub-compile-toplevel-lambdas (subseq lambdas start loser))
1531 (unless (= loser len)
1532 (object-call-toplevel-lambda (elt lambdas loser))))))
1535 ;;; Compile LAMBDAS (a list of CLAMBDAs for top level forms) into the
1538 ;;; LOAD-TIME-VALUE-P seems to control whether it's MAKE-LOAD-FORM and
1539 ;;; COMPILE-LOAD-TIME-VALUE stuff. -- WHN 20000201
1540 (defun compile-toplevel (lambdas load-time-value-p)
1541 (declare (list lambdas))
1543 (maybe-mumble "locall ")
1544 (locall-analyze-clambdas-until-done lambdas)
1546 (maybe-mumble "IDFO ")
1547 (multiple-value-bind (components top-components hairy-top)
1548 (find-initial-dfo lambdas)
1549 (let ((all-components (append components top-components)))
1550 (when *check-consistency*
1551 (maybe-mumble "[check]~%")
1552 (check-ir1-consistency all-components))
1554 (dolist (component (append hairy-top top-components))
1555 (pre-physenv-analyze-toplevel component))
1557 (dolist (component components)
1558 (compile-component component)
1559 (replace-toplevel-xeps component))
1561 (when *check-consistency*
1562 (maybe-mumble "[check]~%")
1563 (check-ir1-consistency all-components))
1565 (if load-time-value-p
1566 (compile-load-time-value-lambda lambdas)
1567 (compile-toplevel-lambdas lambdas))
1569 (mapc #'clear-ir1-info components)))
1572 ;;; Actually compile any stuff that has been queued up for block
1574 (defun finish-block-compilation ()
1575 (when *block-compile*
1576 (when *compile-print*
1577 (compiler-mumble "~&; block compiling converted top level forms..."))
1578 (when *toplevel-lambdas*
1579 (compile-toplevel (nreverse *toplevel-lambdas*) nil)
1580 (setq *toplevel-lambdas* ()))
1581 (setq *block-compile* nil)
1582 (setq *entry-points* nil)))
1584 (defun handle-condition-p (condition)
1586 (etypecase *compiler-error-context*
1588 (node-lexenv *compiler-error-context*))
1589 (compiler-error-context
1590 (let ((lexenv (compiler-error-context-lexenv
1591 *compiler-error-context*)))
1595 (let ((muffles (lexenv-handled-conditions lexenv)))
1596 (if (null muffles) ; common case
1598 (dolist (muffle muffles nil)
1599 (destructuring-bind (typespec . restart-name) muffle
1600 (when (and (typep condition typespec)
1601 (find-restart restart-name condition))
1604 (defun handle-condition-handler (condition)
1606 (etypecase *compiler-error-context*
1608 (node-lexenv *compiler-error-context*))
1609 (compiler-error-context
1610 (let ((lexenv (compiler-error-context-lexenv
1611 *compiler-error-context*)))
1615 (let ((muffles (lexenv-handled-conditions lexenv)))
1617 (dolist (muffle muffles (bug "fell through"))
1618 (destructuring-bind (typespec . restart-name) muffle
1619 (when (typep condition typespec)
1620 (awhen (find-restart restart-name condition)
1621 (invoke-restart it))))))))
1623 ;;; Read all forms from INFO and compile them, with output to OBJECT.
1624 ;;; Return (VALUES ABORT-P WARNINGS-P FAILURE-P).
1625 (defun sub-compile-file (info)
1626 (declare (type source-info info))
1627 (let ((*package* (sane-package))
1628 (*readtable* *readtable*)
1629 (sb!xc:*compile-file-pathname* nil) ; really bound in
1630 (sb!xc:*compile-file-truename* nil) ; SUB-SUB-COMPILE-FILE
1632 (*code-coverage-records* (make-hash-table :test 'equal))
1633 (*code-coverage-blocks* (make-hash-table :test 'equal))
1634 (*handled-conditions* *handled-conditions*)
1635 (*disabled-package-locks* *disabled-package-locks*)
1636 (*lexenv* (make-null-lexenv))
1637 (*block-compile* *block-compile-arg*)
1638 (*toplevel-lambdas* ())
1639 (*fun-names-in-this-file* ())
1640 (*allow-instrumenting* nil)
1641 (*compiler-error-bailout*
1642 (lambda (&optional error)
1643 (declare (ignore error))
1644 (return-from sub-compile-file (values t t t))))
1645 (*current-path* nil)
1646 (*last-source-context* nil)
1647 (*last-original-source* nil)
1648 (*last-source-form* nil)
1649 (*last-format-string* nil)
1650 (*last-format-args* nil)
1651 (*last-message-count* 0)
1652 ;; FIXME: Do we need this rebinding here? It's a literal
1653 ;; translation of the old CMU CL rebinding to
1654 ;; (OR *BACKEND-INFO-ENVIRONMENT* *INFO-ENVIRONMENT*),
1655 ;; and it's not obvious whether the rebinding to itself is
1656 ;; needed that SBCL doesn't need *BACKEND-INFO-ENVIRONMENT*.
1657 (*info-environment* *info-environment*)
1658 (*compiler-sset-counter* 0)
1659 (sb!xc:*gensym-counter* 0))
1661 (handler-bind (((satisfies handle-condition-p) #'handle-condition-handler))
1662 (with-compilation-values
1663 (sb!xc:with-compilation-unit ()
1665 (sub-sub-compile-file info)
1666 (unless (zerop (hash-table-count *code-coverage-records*))
1667 ;; Dump the code coverage records into the fasl.
1669 (fopcompile `(record-code-coverage
1670 ',(namestring *compile-file-pathname*)
1672 (maphash (lambda (k v)
1673 (declare (ignore k))
1675 *code-coverage-records*)
1679 (finish-block-compilation)
1680 (let ((object *compile-object*))
1682 (fasl-output (fasl-dump-source-info info object))
1683 (core-object (fix-core-source-info info object))
1686 ;; Some errors are sufficiently bewildering that we just fail
1687 ;; immediately, without trying to recover and compile more of
1689 (fatal-compiler-error (condition)
1691 (fresh-line *error-output*)
1692 (pprint-logical-block (*error-output* nil :per-line-prefix "; ")
1693 (format *error-output*
1694 "~@<~@:_compilation aborted because of fatal error: ~2I~_~A~@:_~:>"
1695 (encapsulated-condition condition)))
1696 (finish-output *error-output*)
1699 ;;; Return a pathname for the named file. The file must exist.
1700 (defun verify-source-file (pathname-designator)
1701 (let* ((pathname (pathname pathname-designator))
1702 (default-host (make-pathname :host (pathname-host pathname))))
1703 (flet ((try-with-type (path type error-p)
1704 (let ((new (merge-pathnames
1705 path (make-pathname :type type
1706 :defaults default-host))))
1707 (if (probe-file new)
1709 (and error-p (truename new))))))
1710 (cond ((typep pathname 'logical-pathname)
1711 (try-with-type pathname "LISP" t))
1712 ((probe-file pathname) pathname)
1713 ((try-with-type pathname "lisp" nil))
1714 ((try-with-type pathname "lisp" t))))))
1716 (defun elapsed-time-to-string (internal-time-delta)
1717 (multiple-value-bind (tsec remainder)
1718 (truncate internal-time-delta internal-time-units-per-second)
1719 (let ((ms (truncate remainder (/ internal-time-units-per-second 1000))))
1720 (multiple-value-bind (tmin sec) (truncate tsec 60)
1721 (multiple-value-bind (thr min) (truncate tmin 60)
1722 (format nil "~D:~2,'0D:~2,'0D.~3,'0D" thr min sec ms))))))
1724 ;;; Print some junk at the beginning and end of compilation.
1725 (defun print-compile-start-note (source-info)
1726 (declare (type source-info source-info))
1727 (let ((file-info (source-info-file-info source-info)))
1728 (compiler-mumble "~&; compiling file ~S (written ~A):~%"
1729 (namestring (file-info-name file-info))
1730 (sb!int:format-universal-time nil
1731 (file-info-write-date
1735 :print-timezone nil)))
1738 (defun print-compile-end-note (source-info won)
1739 (declare (type source-info source-info))
1740 (compiler-mumble "~&; compilation ~:[aborted after~;finished in~] ~A~&"
1742 (elapsed-time-to-string
1743 (- (get-internal-real-time)
1744 (source-info-start-real-time source-info))))
1747 ;;; Open some files and call SUB-COMPILE-FILE. If something unwinds
1748 ;;; out of the compile, then abort the writing of the output file, so
1749 ;;; that we don't overwrite it with known garbage.
1750 (defun sb!xc:compile-file
1755 (output-file (cfp-output-file-default input-file))
1756 ;; FIXME: ANSI doesn't seem to say anything about
1757 ;; *COMPILE-VERBOSE* and *COMPILE-PRINT* being rebound by this
1759 ((:verbose sb!xc:*compile-verbose*) sb!xc:*compile-verbose*)
1760 ((:print sb!xc:*compile-print*) sb!xc:*compile-print*)
1761 (external-format :default)
1765 ((:block-compile *block-compile-arg*) nil)
1766 (emit-cfasl *emit-cfasl*))
1768 "Compile INPUT-FILE, producing a corresponding fasl file and
1769 returning its filename.
1772 If true, a message per non-macroexpanded top level form is printed
1773 to *STANDARD-OUTPUT*. Top level forms that whose subforms are
1774 processed as top level forms (eg. EVAL-WHEN, MACROLET, PROGN) receive
1775 no such message, but their subforms do.
1777 As an extension to ANSI, if :PRINT is :top-level-forms, a message
1778 per top level form after macroexpansion is printed to *STANDARD-OUTPUT*.
1779 For example, compiling an IN-PACKAGE form will result in a message about
1780 a top level SETQ in addition to the message about the IN-PACKAGE form'
1783 Both forms of reporting obey the SB-EXT:*COMPILER-PRINT-VARIABLE-ALIST*.
1786 Though COMPILE-FILE accepts an additional :BLOCK-COMPILE
1787 argument, it is not currently supported. (non-standard)
1790 If given, internal data structures are dumped to the specified
1791 file, or if a value of T is given, to a file of *.trace type
1792 derived from the input file name. (non-standard)
1795 (Experimental). If true, outputs the toplevel compile-time effects
1796 of this file into a separate .cfasl file."
1797 ;;; Block compilation is currently broken.
1799 "Also, as a workaround for vaguely-non-ANSI behavior, the
1800 :BLOCK-COMPILE argument is quasi-supported, to determine whether
1801 multiple functions are compiled together as a unit, resolving function
1802 references at compile time. NIL means that global function names are
1803 never resolved at compilation time. Currently NIL is the default
1804 behavior, because although section 3.2.2.3, \"Semantic Constraints\",
1805 of the ANSI spec allows this behavior under all circumstances, the
1806 compiler's runtime scales badly when it tries to do this for large
1807 files. If/when this performance problem is fixed, the block
1808 compilation default behavior will probably be made dependent on the
1809 SPEED and COMPILATION-SPEED optimization values, and the
1810 :BLOCK-COMPILE argument will probably become deprecated."
1812 (let* ((fasl-output nil)
1814 (output-file-name nil)
1815 (coutput-file-name nil)
1818 (failure-p t) ; T in case error keeps this from being set later
1819 (input-pathname (verify-source-file input-file))
1820 (source-info (make-file-source-info input-pathname external-format))
1821 (*compiler-trace-output* nil)) ; might be modified below
1826 (setq output-file-name
1827 (sb!xc:compile-file-pathname input-file
1828 :output-file output-file))
1830 (open-fasl-output output-file-name
1831 (namestring input-pathname))))
1833 (setq coutput-file-name
1834 (make-pathname :type "cfasl"
1835 :defaults output-file-name))
1837 (open-fasl-output coutput-file-name
1838 (namestring input-pathname))))
1840 (let* ((default-trace-file-pathname
1841 (make-pathname :type "trace" :defaults input-pathname))
1842 (trace-file-pathname
1843 (if (eql trace-file t)
1844 default-trace-file-pathname
1845 (merge-pathnames trace-file
1846 default-trace-file-pathname))))
1847 (setf *compiler-trace-output*
1848 (open trace-file-pathname
1849 :if-exists :supersede
1850 :direction :output))))
1852 (when sb!xc:*compile-verbose*
1853 (print-compile-start-note source-info))
1855 (let ((*compile-object* fasl-output)
1856 (*compile-toplevel-object* cfasl-output))
1857 (setf (values abort-p warnings-p failure-p)
1858 (sub-compile-file source-info))))
1860 (close-source-info source-info)
1863 (close-fasl-output fasl-output abort-p)
1864 (setq output-file-name
1865 (pathname (fasl-output-stream fasl-output)))
1866 (when (and (not abort-p) sb!xc:*compile-verbose*)
1867 (compiler-mumble "~2&; ~A written~%" (namestring output-file-name))))
1870 (close-fasl-output cfasl-output abort-p)
1871 (when (and (not abort-p) sb!xc:*compile-verbose*)
1872 (compiler-mumble "; ~A written~%" (namestring coutput-file-name))))
1874 (when sb!xc:*compile-verbose*
1875 (print-compile-end-note source-info (not abort-p)))
1877 (when *compiler-trace-output*
1878 (close *compiler-trace-output*)))
1880 ;; CLHS says that the first value is NIL if the "file could not
1881 ;; be created". We interpret this to mean "a valid fasl could not
1882 ;; be created" -- which can happen if the compilation is aborted
1883 ;; before the whole file has been processed, due to eg. a reader
1885 (values (when (and (not abort-p) output-file)
1886 ;; Hack around filesystem race condition...
1887 (or (probe-file output-file-name) output-file-name))
1891 ;;; a helper function for COMPILE-FILE-PATHNAME: the default for
1892 ;;; the OUTPUT-FILE argument
1894 ;;; ANSI: The defaults for the OUTPUT-FILE are taken from the pathname
1895 ;;; that results from merging the INPUT-FILE with the value of
1896 ;;; *DEFAULT-PATHNAME-DEFAULTS*, except that the type component should
1897 ;;; default to the appropriate implementation-defined default type for
1899 (defun cfp-output-file-default (input-file)
1900 (let* ((defaults (merge-pathnames input-file *default-pathname-defaults*))
1901 (retyped (make-pathname :type *fasl-file-type* :defaults defaults)))
1904 ;;; KLUDGE: Part of the ANSI spec for this seems contradictory:
1905 ;;; If INPUT-FILE is a logical pathname and OUTPUT-FILE is unsupplied,
1906 ;;; the result is a logical pathname. If INPUT-FILE is a logical
1907 ;;; pathname, it is translated into a physical pathname as if by
1908 ;;; calling TRANSLATE-LOGICAL-PATHNAME.
1909 ;;; So I haven't really tried to make this precisely ANSI-compatible
1910 ;;; at the level of e.g. whether it returns logical pathname or a
1911 ;;; physical pathname. Patches to make it more correct are welcome.
1912 ;;; -- WHN 2000-12-09
1913 (defun sb!xc:compile-file-pathname (input-file
1915 (output-file nil output-file-p)
1918 "Return a pathname describing what file COMPILE-FILE would write to given
1921 (merge-pathnames output-file (cfp-output-file-default input-file))
1922 (cfp-output-file-default input-file)))
1924 ;;;; MAKE-LOAD-FORM stuff
1926 ;;; The entry point for MAKE-LOAD-FORM support. When IR1 conversion
1927 ;;; finds a constant structure, it invokes this to arrange for proper
1928 ;;; dumping. If it turns out that the constant has already been
1929 ;;; dumped, then we don't need to do anything.
1931 ;;; If the constant hasn't been dumped, then we check to see whether
1932 ;;; we are in the process of creating it. We detect this by
1933 ;;; maintaining the special *CONSTANTS-BEING-CREATED* as a list of all
1934 ;;; the constants we are in the process of creating. Actually, each
1935 ;;; entry is a list of the constant and any init forms that need to be
1936 ;;; processed on behalf of that constant.
1938 ;;; It's not necessarily an error for this to happen. If we are
1939 ;;; processing the init form for some object that showed up *after*
1940 ;;; the original reference to this constant, then we just need to
1941 ;;; defer the processing of that init form. To detect this, we
1942 ;;; maintain *CONSTANTS-CREATED-SINCE-LAST-INIT* as a list of the
1943 ;;; constants created since the last time we started processing an
1944 ;;; init form. If the constant passed to emit-make-load-form shows up
1945 ;;; in this list, then there is a circular chain through creation
1946 ;;; forms, which is an error.
1948 ;;; If there is some intervening init form, then we blow out of
1949 ;;; processing it by throwing to the tag PENDING-INIT. The value we
1950 ;;; throw is the entry from *CONSTANTS-BEING-CREATED*. This is so the
1951 ;;; offending init form can be tacked onto the init forms for the
1952 ;;; circular object.
1954 ;;; If the constant doesn't show up in *CONSTANTS-BEING-CREATED*, then
1955 ;;; we have to create it. We call MAKE-LOAD-FORM and check to see
1956 ;;; whether the creation form is the magic value
1957 ;;; :SB-JUST-DUMP-IT-NORMALLY. If it is, then we don't do anything. The
1958 ;;; dumper will eventually get its hands on the object and use the
1959 ;;; normal structure dumping noise on it.
1961 ;;; Otherwise, we bind *CONSTANTS-BEING-CREATED* and
1962 ;;; *CONSTANTS-CREATED-SINCE- LAST-INIT* and compile the creation form
1963 ;;; much the way LOAD-TIME-VALUE does. When this finishes, we tell the
1964 ;;; dumper to use that result instead whenever it sees this constant.
1966 ;;; Now we try to compile the init form. We bind
1967 ;;; *CONSTANTS-CREATED-SINCE-LAST-INIT* to NIL and compile the init
1968 ;;; form (and any init forms that were added because of circularity
1969 ;;; detection). If this works, great. If not, we add the init forms to
1970 ;;; the init forms for the object that caused the problems and let it
1972 (defvar *constants-being-created* nil)
1973 (defvar *constants-created-since-last-init* nil)
1974 ;;; FIXME: Shouldn't these^ variables be unbound outside LET forms?
1975 (defun emit-make-load-form (constant &optional (name nil namep))
1976 (aver (fasl-output-p *compile-object*))
1977 (unless (or (fasl-constant-already-dumped-p constant *compile-object*)
1978 ;; KLUDGE: This special hack is because I was too lazy
1979 ;; to rework DEF!STRUCT so that the MAKE-LOAD-FORM
1980 ;; function of LAYOUT returns nontrivial forms when
1981 ;; building the cross-compiler but :IGNORE-IT when
1982 ;; cross-compiling or running under the target Lisp. --
1984 #+sb-xc-host (typep constant 'layout))
1985 (let ((circular-ref (assoc constant *constants-being-created* :test #'eq)))
1987 (when (find constant *constants-created-since-last-init* :test #'eq)
1989 (throw 'pending-init circular-ref)))
1990 (multiple-value-bind (creation-form init-form)
1992 ;; If the constant is a reference to a named constant, we can
1993 ;; just use SYMBOL-VALUE during LOAD.
1994 (values `(symbol-value ',name) nil)
1996 (sb!xc:make-load-form constant (make-null-lexenv))
1998 (compiler-error condition))))
2000 (:sb-just-dump-it-normally
2001 (fasl-validate-structure constant *compile-object*)
2006 (let* ((name (write-to-string constant :level 1 :length 2))
2008 (list constant name init-form)
2010 (let ((*constants-being-created*
2011 (cons info *constants-being-created*))
2012 (*constants-created-since-last-init*
2013 (cons constant *constants-created-since-last-init*)))
2016 (fasl-note-handle-for-constant
2018 (compile-load-time-value
2022 (compiler-error "circular references in creation form for ~S"
2025 (let* ((*constants-created-since-last-init* nil)
2027 (catch 'pending-init
2028 (loop for (name form) on (cdr info) by #'cddr
2029 collect name into names
2030 collect form into forms
2031 finally (compile-make-load-form-init-forms forms))
2034 (setf (cdr circular-ref)
2035 (append (cdr circular-ref) (cdr info))))))))))))
2038 ;;;; Host compile time definitions
2040 (defun compile-in-lexenv (name lambda lexenv)
2041 (declare (ignore lexenv))
2042 (compile name lambda))
2045 (defun eval-tlf (form index &optional lexenv)
2046 (declare (ignore index lexenv))
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