1 ;;; bytecomp.el --- compilation of Lisp code into byte code -*- lexical-binding: t -*-
3 ;; Copyright (C) 1985-1987, 1992, 1994, 1998, 2000-2014 Free Software
6 ;; Author: Jamie Zawinski <jwz@lucid.com>
7 ;; Hallvard Furuseth <hbf@ulrik.uio.no>
8 ;; Maintainer: emacs-devel@gnu.org
12 ;; This file is part of GNU Emacs.
14 ;; GNU Emacs is free software: you can redistribute it and/or modify
15 ;; it under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation, either version 3 of the License, or
17 ;; (at your option) any later version.
19 ;; GNU Emacs is distributed in the hope that it will be useful,
20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ;; GNU General Public License for more details.
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
29 ;; The Emacs Lisp byte compiler. This crunches lisp source into a sort
30 ;; of p-code (`lapcode') which takes up less space and can be interpreted
31 ;; faster. [`LAP' == `Lisp Assembly Program'.]
32 ;; The user entry points are byte-compile-file and byte-recompile-directory.
36 ;; ========================================================================
38 ;; byte-recompile-directory, byte-compile-file,
39 ;; byte-recompile-file,
40 ;; batch-byte-compile, batch-byte-recompile-directory,
41 ;; byte-compile, compile-defun,
43 ;; (byte-compile-buffer and byte-compile-and-load-file were turned off
44 ;; because they are not terribly useful and get in the way of completion.)
46 ;; This version of the byte compiler has the following improvements:
47 ;; + optimization of compiled code:
48 ;; - removal of unreachable code;
49 ;; - removal of calls to side-effectless functions whose return-value
51 ;; - compile-time evaluation of safe constant forms, such as (consp nil)
53 ;; - open-coding of literal lambdas;
54 ;; - peephole optimization of emitted code;
55 ;; - trivial functions are left uncompiled for speed.
56 ;; + support for inline functions;
57 ;; + compile-time evaluation of arbitrary expressions;
58 ;; + compile-time warning messages for:
59 ;; - functions being redefined with incompatible arglists;
60 ;; - functions being redefined as macros, or vice-versa;
61 ;; - functions or macros defined multiple times in the same file;
62 ;; - functions being called with the incorrect number of arguments;
63 ;; - functions being called which are not defined globally, in the
64 ;; file, or as autoloads;
65 ;; - assignment and reference of undeclared free variables;
66 ;; - various syntax errors;
67 ;; + correct compilation of nested defuns, defmacros, defvars and defsubsts;
68 ;; + correct compilation of top-level uses of macros;
69 ;; + the ability to generate a histogram of functions called.
71 ;; User customization variables: M-x customize-group bytecomp
75 ;; o The form `defsubst' is just like `defun', except that the function
76 ;; generated will be open-coded in compiled code which uses it. This
77 ;; means that no function call will be generated, it will simply be
78 ;; spliced in. Lisp functions calls are very slow, so this can be a
81 ;; You can generally accomplish the same thing with `defmacro', but in
82 ;; that case, the defined procedure can't be used as an argument to
85 ;; o You can also open-code one particular call to a function without
86 ;; open-coding all calls. Use the 'inline' form to do this, like so:
88 ;; (inline (foo 1 2 3)) ;; `foo' will be open-coded
90 ;; (inline ;; `foo' and `baz' will be
91 ;; (foo 1 2 3 (bar 5)) ;; open-coded, but `bar' will not.
94 ;; o It is possible to open-code a function in the same file it is defined
95 ;; in without having to load that file before compiling it. The
96 ;; byte-compiler has been modified to remember function definitions in
97 ;; the compilation environment in the same way that it remembers macro
100 ;; o Forms like ((lambda ...) ...) are open-coded.
102 ;; o The form `eval-when-compile' is like progn, except that the body
103 ;; is evaluated at compile-time. When it appears at top-level, this
104 ;; is analogous to the Common Lisp idiom (eval-when (compile) ...).
105 ;; When it does not appear at top-level, it is similar to the
106 ;; Common Lisp #. reader macro (but not in interpreted code).
108 ;; o The form `eval-and-compile' is similar to eval-when-compile, but
109 ;; the whole form is evalled both at compile-time and at run-time.
111 ;; o The command compile-defun is analogous to eval-defun.
113 ;; o If you run byte-compile-file on a filename which is visited in a
114 ;; buffer, and that buffer is modified, you are asked whether you want
115 ;; to save the buffer before compiling.
117 ;; o byte-compiled files now start with the string `;ELC'.
118 ;; Some versions of `file' can be customized to recognize that.
124 ;; During bootstrap, cl-loaddefs.el is not created yet, so loading cl-lib
125 ;; doesn't setup autoloads for things like cl-every, which is why we have to
126 ;; require cl-extra instead (bug#18804).
129 (or (fboundp 'defsubst)
130 ;; This really ought to be loaded already!
133 ;; The feature of compiling in a specific target Emacs version
134 ;; has been turned off because compile time options are a bad idea.
135 (defgroup bytecomp nil
136 "Emacs Lisp byte-compiler."
139 (defcustom emacs-lisp-file-regexp "\\.el\\'"
140 "Regexp which matches Emacs Lisp source files.
141 If you change this, you might want to set `byte-compile-dest-file-function'."
145 (defcustom byte-compile-dest-file-function nil
146 "Function for the function `byte-compile-dest-file' to call.
147 It should take one argument, the name of an Emacs Lisp source
148 file name, and return the name of the compiled file."
150 :type '(choice (const nil) function)
153 ;; This enables file name handlers such as jka-compr
154 ;; to remove parts of the file name that should not be copied
155 ;; through to the output file name.
156 (defun byte-compiler-base-file-name (filename)
157 (let ((handler (find-file-name-handler filename
158 'byte-compiler-base-file-name)))
160 (funcall handler 'byte-compiler-base-file-name filename)
163 (or (fboundp 'byte-compile-dest-file)
164 ;; The user may want to redefine this along with emacs-lisp-file-regexp,
165 ;; so only define it if it is undefined.
166 ;; Note - redefining this function is obsolete as of 23.2.
167 ;; Customize byte-compile-dest-file-function instead.
168 (defun byte-compile-dest-file (filename)
169 "Convert an Emacs Lisp source file name to a compiled file name.
170 If `byte-compile-dest-file-function' is non-nil, uses that
171 function to do the work. Otherwise, if FILENAME matches
172 `emacs-lisp-file-regexp' (by default, files with the extension `.el'),
173 adds `c' to it; otherwise adds `.elc'."
174 (if byte-compile-dest-file-function
175 (funcall byte-compile-dest-file-function filename)
176 (setq filename (file-name-sans-versions
177 (byte-compiler-base-file-name filename)))
178 (cond ((string-match emacs-lisp-file-regexp filename)
179 (concat (substring filename 0 (match-beginning 0)) ".elc"))
180 (t (concat filename ".elc"))))))
182 ;; This can be the 'byte-compile property of any symbol.
183 (autoload 'byte-compile-inline-expand "byte-opt")
185 ;; This is the entry point to the lapcode optimizer pass1.
186 (autoload 'byte-optimize-form "byte-opt")
187 ;; This is the entry point to the lapcode optimizer pass2.
188 (autoload 'byte-optimize-lapcode "byte-opt")
189 (autoload 'byte-compile-unfold-lambda "byte-opt")
191 ;; This is the entry point to the decompiler, which is used by the
192 ;; disassembler. The disassembler just requires 'byte-compile, but
193 ;; that doesn't define this function, so this seems to be a reasonable
195 (autoload 'byte-decompile-bytecode "byte-opt")
197 (defcustom byte-compile-verbose
198 (and (not noninteractive) (> baud-rate search-slow-speed))
199 "Non-nil means print messages describing progress of byte-compiler."
203 (defcustom byte-optimize t
204 "Enable optimization in the byte compiler.
206 nil - no optimization
207 t - all optimizations
208 `source' - source-level optimizations only
209 `byte' - code-level optimizations only"
211 :type '(choice (const :tag "none" nil)
213 (const :tag "source-level" source)
214 (const :tag "byte-level" byte)))
216 (defcustom byte-compile-delete-errors nil
217 "If non-nil, the optimizer may delete forms that may signal an error.
218 This includes variable references and calls to functions such as `car'."
222 (defvar byte-compile-dynamic nil
223 "If non-nil, compile function bodies so they load lazily.
224 They are hidden in comments in the compiled file,
225 and each one is brought into core when the
228 To enable this option, make it a file-local variable
229 in the source file you want it to apply to.
230 For example, add -*-byte-compile-dynamic: t;-*- on the first line.
232 When this option is true, if you load the compiled file and then move it,
233 the functions you loaded will not be able to run.")
234 ;;;###autoload(put 'byte-compile-dynamic 'safe-local-variable 'booleanp)
236 (defvar byte-compile-disable-print-circle nil
237 "If non-nil, disable `print-circle' on printing a byte-compiled code.")
238 (make-obsolete-variable 'byte-compile-disable-print-circle nil "24.1")
239 ;;;###autoload(put 'byte-compile-disable-print-circle 'safe-local-variable 'booleanp)
241 (defcustom byte-compile-dynamic-docstrings t
242 "If non-nil, compile doc strings for lazy access.
243 We bury the doc strings of functions and variables inside comments in
244 the file, and bring them into core only when they are actually needed.
246 When this option is true, if you load the compiled file and then move it,
247 you won't be able to find the documentation of anything in that file.
249 To disable this option for a certain file, make it a file-local variable
250 in the source file. For example, add this to the first line:
251 -*-byte-compile-dynamic-docstrings:nil;-*-
252 You can also set the variable globally.
254 This option is enabled by default because it reduces Emacs memory usage."
257 ;;;###autoload(put 'byte-compile-dynamic-docstrings 'safe-local-variable 'booleanp)
259 (defconst byte-compile-log-buffer "*Compile-Log*"
260 "Name of the byte-compiler's log buffer.")
262 (defcustom byte-optimize-log nil
263 "If non-nil, the byte-compiler will log its optimizations.
264 If this is 'source, then only source-level optimizations will be logged.
265 If it is 'byte, then only byte-level optimizations will be logged.
266 The information is logged to `byte-compile-log-buffer'."
268 :type '(choice (const :tag "none" nil)
270 (const :tag "source-level" source)
271 (const :tag "byte-level" byte)))
273 (defcustom byte-compile-error-on-warn nil
274 "If true, the byte-compiler reports warnings with `error'."
278 (defconst byte-compile-warning-types
279 '(redefine callargs free-vars unresolved
280 obsolete noruntime cl-functions interactive-only
281 make-local mapcar constants suspicious lexical)
282 "The list of warning types used when `byte-compile-warnings' is t.")
283 (defcustom byte-compile-warnings t
284 "List of warnings that the byte-compiler should issue (t for all).
286 Elements of the list may be:
288 free-vars references to variables not in the current lexical scope.
289 unresolved calls to unknown functions.
290 callargs function calls with args that don't match the definition.
291 redefine function name redefined from a macro to ordinary function or vice
292 versa, or redefined to take a different number of arguments.
293 obsolete obsolete variables and functions.
294 noruntime functions that may not be defined at runtime (typically
295 defined only under `eval-when-compile').
296 cl-functions calls to runtime functions (as distinguished from macros and
297 aliases) from the old CL package (not the newer cl-lib).
299 commands that normally shouldn't be called from Lisp code.
300 lexical global/dynamic variables lacking a prefix.
301 make-local calls to make-variable-buffer-local that may be incorrect.
302 mapcar mapcar called for effect.
303 constants let-binding of, or assignment to, constants/nonvariables.
304 suspicious constructs that usually don't do what the coder wanted.
306 If the list begins with `not', then the remaining elements specify warnings to
307 suppress. For example, (not mapcar) will suppress warnings about mapcar."
309 :type `(choice (const :tag "All" t)
310 (set :menu-tag "Some"
311 ,@(mapcar (lambda (x) `(const ,x))
312 byte-compile-warning-types))))
315 (put 'byte-compile-warnings 'safe-local-variable
318 (null (delq nil (mapcar (lambda (x) (not (symbolp x))) v))))))
320 (defun byte-compile-warning-enabled-p (warning)
321 "Return non-nil if WARNING is enabled, according to `byte-compile-warnings'."
322 (or (eq byte-compile-warnings t)
323 (if (eq (car byte-compile-warnings) 'not)
324 (not (memq warning byte-compile-warnings))
325 (memq warning byte-compile-warnings))))
328 (defun byte-compile-disable-warning (warning)
329 "Change `byte-compile-warnings' to disable WARNING.
330 If `byte-compile-warnings' is t, set it to `(not WARNING)'.
331 Otherwise, if the first element is `not', add WARNING, else remove it.
332 Normally you should let-bind `byte-compile-warnings' before calling this,
333 else the global value will be modified."
334 (setq byte-compile-warnings
335 (cond ((eq byte-compile-warnings t)
337 ((eq (car byte-compile-warnings) 'not)
338 (if (memq warning byte-compile-warnings)
339 byte-compile-warnings
340 (append byte-compile-warnings (list warning))))
342 (delq warning byte-compile-warnings)))))
345 (defun byte-compile-enable-warning (warning)
346 "Change `byte-compile-warnings' to enable WARNING.
347 If `byte-compile-warnings' is `t', do nothing. Otherwise, if the
348 first element is `not', remove WARNING, else add it.
349 Normally you should let-bind `byte-compile-warnings' before calling this,
350 else the global value will be modified."
351 (or (eq byte-compile-warnings t)
352 (setq byte-compile-warnings
353 (cond ((eq (car byte-compile-warnings) 'not)
354 (delq warning byte-compile-warnings))
355 ((memq warning byte-compile-warnings)
356 byte-compile-warnings)
358 (append byte-compile-warnings (list warning)))))))
360 (defvar byte-compile-interactive-only-functions nil
361 "List of commands that are not meant to be called from Lisp.")
362 (make-obsolete-variable 'byte-compile-interactive-only-functions
363 "use the `interactive-only' symbol property instead."
366 (defvar byte-compile-not-obsolete-vars nil
367 "List of variables that shouldn't be reported as obsolete.")
368 (defvar byte-compile-global-not-obsolete-vars nil
369 "Global list of variables that shouldn't be reported as obsolete.")
371 (defvar byte-compile-not-obsolete-funcs nil
372 "List of functions that shouldn't be reported as obsolete.")
374 (defcustom byte-compile-generate-call-tree nil
375 "Non-nil means collect call-graph information when compiling.
376 This records which functions were called and from where.
377 If the value is t, compilation displays the call graph when it finishes.
378 If the value is neither t nor nil, compilation asks you whether to display
381 The call tree only lists functions called, not macros used. Those functions
382 which the byte-code interpreter knows about directly (eq, cons, etc.) are
385 The call tree also lists those functions which are not known to be called
386 \(that is, to which no calls have been compiled). Functions which can be
387 invoked interactively are excluded from this list."
389 :type '(choice (const :tag "Yes" t) (const :tag "No" nil)
390 (other :tag "Ask" lambda)))
392 (defvar byte-compile-call-tree nil
393 "Alist of functions and their call tree.
394 Each element looks like
396 \(FUNCTION CALLERS CALLS\)
398 where CALLERS is a list of functions that call FUNCTION, and CALLS
399 is a list of functions for which calls were generated while compiling
402 (defcustom byte-compile-call-tree-sort 'name
403 "If non-nil, sort the call tree.
404 The values `name', `callers', `calls', `calls+callers'
405 specify different fields to sort on."
407 :type '(choice (const name) (const callers) (const calls)
408 (const calls+callers) (const nil)))
410 (defvar byte-compile-debug nil)
411 (defvar byte-compile-constants nil
412 "List of all constants encountered during compilation of this form.")
413 (defvar byte-compile-variables nil
414 "List of all variables encountered during compilation of this form.")
415 (defvar byte-compile-bound-variables nil
416 "List of dynamic variables bound in the context of the current form.
417 This list lives partly on the stack.")
418 (defvar byte-compile-lexical-variables nil
419 "List of variables that have been treated as lexical.
420 Filled in `cconv-analyse-form' but initialized and consulted here.")
421 (defvar byte-compile-const-variables nil
422 "List of variables declared as constants during compilation of this file.")
423 (defvar byte-compile-free-references)
424 (defvar byte-compile-free-assignments)
426 (defvar byte-compiler-error-flag)
428 (defun byte-compile-recurse-toplevel (form non-toplevel-case)
429 "Implement `eval-when-compile' and `eval-and-compile'.
430 Return the compile-time value of FORM."
431 ;; Macroexpand (not macroexpand-all!) form at toplevel in case it
432 ;; expands into a toplevel-equivalent `progn'. See CLHS section
433 ;; 3.2.3.1, "Processing of Top Level Forms". The semantics are very
434 ;; subtle: see test/automated/bytecomp-tests.el for interesting
436 (setf form (macroexpand form byte-compile-macro-environment))
437 (if (eq (car-safe form) 'progn)
439 (mapcar (lambda (subform)
440 (byte-compile-recurse-toplevel
441 subform non-toplevel-case))
443 (funcall non-toplevel-case form)))
445 (defconst byte-compile-initial-macro-environment
447 ;; (byte-compiler-options . (lambda (&rest forms)
448 ;; (apply 'byte-compiler-options-handler forms)))
449 (declare-function . byte-compile-macroexpand-declare-function)
450 (eval-when-compile . ,(lambda (&rest body)
452 (byte-compile-recurse-toplevel
457 (byte-compile-top-level
458 (byte-compile-preprocess form))))))
459 (list 'quote result))))
460 (eval-and-compile . ,(lambda (&rest body)
461 (byte-compile-recurse-toplevel
464 (let ((compiled (byte-compile-top-level
465 (byte-compile-preprocess form))))
466 (eval compiled lexical-binding)
468 "The default macro-environment passed to macroexpand by the compiler.
469 Placing a macro here will cause a macro to have different semantics when
470 expanded by the compiler as when expanded by the interpreter.")
472 (defvar byte-compile-macro-environment byte-compile-initial-macro-environment
473 "Alist of macros defined in the file being compiled.
474 Each element looks like (MACRONAME . DEFINITION). It is
475 \(MACRONAME . nil) when a macro is redefined as a function.")
477 (defvar byte-compile-function-environment nil
478 "Alist of functions defined in the file being compiled.
479 This is so we can inline them when necessary.
480 Each element looks like (FUNCTIONNAME . DEFINITION). It is
481 \(FUNCTIONNAME . nil) when a function is redefined as a macro.
482 It is \(FUNCTIONNAME . t) when all we know is that it was defined,
483 and we don't know the definition. For an autoloaded function, DEFINITION
484 has the form (autoload . FILENAME).")
486 (defvar byte-compile-unresolved-functions nil
487 "Alist of undefined functions to which calls have been compiled.
488 This variable is only significant whilst compiling an entire buffer.
489 Used for warnings when a function is not known to be defined or is later
490 defined with incorrect args.")
492 (defvar byte-compile-noruntime-functions nil
493 "Alist of functions called that may not be defined when the compiled code is run.
494 Used for warnings about calling a function that is defined during compilation
495 but won't necessarily be defined when the compiled file is loaded.")
497 ;; Variables for lexical binding
498 (defvar byte-compile--lexical-environment nil
499 "The current lexical environment.")
501 (defvar byte-compile-tag-number 0)
502 (defvar byte-compile-output nil
503 "Alist describing contents to put in byte code string.
504 Each element is (INDEX . VALUE)")
505 (defvar byte-compile-depth 0 "Current depth of execution stack.")
506 (defvar byte-compile-maxdepth 0 "Maximum depth of execution stack.")
509 ;;; The byte codes; this information is duplicated in bytecomp.c
511 (defvar byte-code-vector nil
512 "An array containing byte-code names indexed by byte-code values.")
514 (defvar byte-stack+-info nil
515 "An array with the stack adjustment for each byte-code.")
517 (defmacro byte-defop (opcode stack-adjust opname &optional docstring)
518 ;; This is a speed-hack for building the byte-code-vector at compile-time.
519 ;; We fill in the vector at macroexpand-time, and then after the last call
520 ;; to byte-defop, we write the vector out as a constant instead of writing
521 ;; out a bunch of calls to aset.
522 ;; Actually, we don't fill in the vector itself, because that could make
523 ;; it problematic to compile big changes to this compiler; we store the
524 ;; values on its plist, and remove them later in -extrude.
525 (let ((v1 (or (get 'byte-code-vector 'tmp-compile-time-value)
526 (put 'byte-code-vector 'tmp-compile-time-value
527 (make-vector 256 nil))))
528 (v2 (or (get 'byte-stack+-info 'tmp-compile-time-value)
529 (put 'byte-stack+-info 'tmp-compile-time-value
530 (make-vector 256 nil)))))
531 (aset v1 opcode opname)
532 (aset v2 opcode stack-adjust))
534 (list 'defconst opname opcode (concat "Byte code opcode " docstring "."))
535 (list 'defconst opname opcode)))
537 (defmacro byte-extrude-byte-code-vectors ()
538 (prog1 (list 'setq 'byte-code-vector
539 (get 'byte-code-vector 'tmp-compile-time-value)
541 (get 'byte-stack+-info 'tmp-compile-time-value))
542 (put 'byte-code-vector 'tmp-compile-time-value nil)
543 (put 'byte-stack+-info 'tmp-compile-time-value nil)))
546 ;; These opcodes are special in that they pack their argument into the
549 (byte-defop 0 1 byte-stack-ref "for stack reference")
550 (byte-defop 8 1 byte-varref "for variable reference")
551 (byte-defop 16 -1 byte-varset "for setting a variable")
552 (byte-defop 24 -1 byte-varbind "for binding a variable")
553 (byte-defop 32 0 byte-call "for calling a function")
554 (byte-defop 40 0 byte-unbind "for unbinding special bindings")
555 ;; codes 8-47 are consumed by the preceding opcodes
557 ;; New (in Emacs-24.4) bytecodes for more efficient handling of non-local exits
558 ;; (especially useful in lexical-binding code).
559 (byte-defop 48 0 byte-pophandler)
560 (byte-defop 50 -1 byte-pushcatch)
561 (byte-defop 49 -1 byte-pushconditioncase)
565 (byte-defop 56 -1 byte-nth)
566 (byte-defop 57 0 byte-symbolp)
567 (byte-defop 58 0 byte-consp)
568 (byte-defop 59 0 byte-stringp)
569 (byte-defop 60 0 byte-listp)
570 (byte-defop 61 -1 byte-eq)
571 (byte-defop 62 -1 byte-memq)
572 (byte-defop 63 0 byte-not)
573 (byte-defop 64 0 byte-car)
574 (byte-defop 65 0 byte-cdr)
575 (byte-defop 66 -1 byte-cons)
576 (byte-defop 67 0 byte-list1)
577 (byte-defop 68 -1 byte-list2)
578 (byte-defop 69 -2 byte-list3)
579 (byte-defop 70 -3 byte-list4)
580 (byte-defop 71 0 byte-length)
581 (byte-defop 72 -1 byte-aref)
582 (byte-defop 73 -2 byte-aset)
583 (byte-defop 74 0 byte-symbol-value)
584 (byte-defop 75 0 byte-symbol-function) ; this was commented out
585 (byte-defop 76 -1 byte-set)
586 (byte-defop 77 -1 byte-fset) ; this was commented out
587 (byte-defop 78 -1 byte-get)
588 (byte-defop 79 -2 byte-substring)
589 (byte-defop 80 -1 byte-concat2)
590 (byte-defop 81 -2 byte-concat3)
591 (byte-defop 82 -3 byte-concat4)
592 (byte-defop 83 0 byte-sub1)
593 (byte-defop 84 0 byte-add1)
594 (byte-defop 85 -1 byte-eqlsign)
595 (byte-defop 86 -1 byte-gtr)
596 (byte-defop 87 -1 byte-lss)
597 (byte-defop 88 -1 byte-leq)
598 (byte-defop 89 -1 byte-geq)
599 (byte-defop 90 -1 byte-diff)
600 (byte-defop 91 0 byte-negate)
601 (byte-defop 92 -1 byte-plus)
602 (byte-defop 93 -1 byte-max)
603 (byte-defop 94 -1 byte-min)
604 (byte-defop 95 -1 byte-mult) ; v19 only
605 (byte-defop 96 1 byte-point)
606 (byte-defop 98 0 byte-goto-char)
607 (byte-defop 99 0 byte-insert)
608 (byte-defop 100 1 byte-point-max)
609 (byte-defop 101 1 byte-point-min)
610 (byte-defop 102 0 byte-char-after)
611 (byte-defop 103 1 byte-following-char)
612 (byte-defop 104 1 byte-preceding-char)
613 (byte-defop 105 1 byte-current-column)
614 (byte-defop 106 0 byte-indent-to)
615 (byte-defop 107 0 byte-scan-buffer-OBSOLETE) ; no longer generated as of v18
616 (byte-defop 108 1 byte-eolp)
617 (byte-defop 109 1 byte-eobp)
618 (byte-defop 110 1 byte-bolp)
619 (byte-defop 111 1 byte-bobp)
620 (byte-defop 112 1 byte-current-buffer)
621 (byte-defop 113 0 byte-set-buffer)
622 (byte-defop 114 0 byte-save-current-buffer
623 "To make a binding to record the current buffer")
624 (byte-defop 115 0 byte-set-mark-OBSOLETE)
625 (byte-defop 116 1 byte-interactive-p-OBSOLETE)
627 ;; These ops are new to v19
628 (byte-defop 117 0 byte-forward-char)
629 (byte-defop 118 0 byte-forward-word)
630 (byte-defop 119 -1 byte-skip-chars-forward)
631 (byte-defop 120 -1 byte-skip-chars-backward)
632 (byte-defop 121 0 byte-forward-line)
633 (byte-defop 122 0 byte-char-syntax)
634 (byte-defop 123 -1 byte-buffer-substring)
635 (byte-defop 124 -1 byte-delete-region)
636 (byte-defop 125 -1 byte-narrow-to-region)
637 (byte-defop 126 1 byte-widen)
638 (byte-defop 127 0 byte-end-of-line)
642 ;; These store their argument in the next two bytes
643 (byte-defop 129 1 byte-constant2
644 "for reference to a constant with vector index >= byte-constant-limit")
645 (byte-defop 130 0 byte-goto "for unconditional jump")
646 (byte-defop 131 -1 byte-goto-if-nil "to pop value and jump if it's nil")
647 (byte-defop 132 -1 byte-goto-if-not-nil "to pop value and jump if it's not nil")
648 (byte-defop 133 -1 byte-goto-if-nil-else-pop
649 "to examine top-of-stack, jump and don't pop it if it's nil,
651 (byte-defop 134 -1 byte-goto-if-not-nil-else-pop
652 "to examine top-of-stack, jump and don't pop it if it's non nil,
655 (byte-defop 135 -1 byte-return "to pop a value and return it from `byte-code'")
656 (byte-defop 136 -1 byte-discard "to discard one value from stack")
657 (byte-defop 137 1 byte-dup "to duplicate the top of the stack")
659 (byte-defop 138 0 byte-save-excursion
660 "to make a binding to record the buffer, point and mark")
661 (byte-defop 139 0 byte-save-window-excursion-OBSOLETE
662 "to make a binding to record entire window configuration")
663 (byte-defop 140 0 byte-save-restriction
664 "to make a binding to record the current buffer clipping restrictions")
665 (byte-defop 141 -1 byte-catch
666 "for catch. Takes, on stack, the tag and an expression for the body")
667 (byte-defop 142 -1 byte-unwind-protect
668 "for unwind-protect. Takes, on stack, an expression for the unwind-action")
670 ;; For condition-case. Takes, on stack, the variable to bind,
671 ;; an expression for the body, and a list of clauses.
672 (byte-defop 143 -2 byte-condition-case)
674 (byte-defop 144 0 byte-temp-output-buffer-setup-OBSOLETE)
675 (byte-defop 145 -1 byte-temp-output-buffer-show-OBSOLETE)
677 ;; these ops are new to v19
679 ;; To unbind back to the beginning of this frame.
680 ;; Not used yet, but will be needed for tail-recursion elimination.
681 (byte-defop 146 0 byte-unbind-all)
683 ;; these ops are new to v19
684 (byte-defop 147 -2 byte-set-marker)
685 (byte-defop 148 0 byte-match-beginning)
686 (byte-defop 149 0 byte-match-end)
687 (byte-defop 150 0 byte-upcase)
688 (byte-defop 151 0 byte-downcase)
689 (byte-defop 152 -1 byte-string=)
690 (byte-defop 153 -1 byte-string<)
691 (byte-defop 154 -1 byte-equal)
692 (byte-defop 155 -1 byte-nthcdr)
693 (byte-defop 156 -1 byte-elt)
694 (byte-defop 157 -1 byte-member)
695 (byte-defop 158 -1 byte-assq)
696 (byte-defop 159 0 byte-nreverse)
697 (byte-defop 160 -1 byte-setcar)
698 (byte-defop 161 -1 byte-setcdr)
699 (byte-defop 162 0 byte-car-safe)
700 (byte-defop 163 0 byte-cdr-safe)
701 (byte-defop 164 -1 byte-nconc)
702 (byte-defop 165 -1 byte-quo)
703 (byte-defop 166 -1 byte-rem)
704 (byte-defop 167 0 byte-numberp)
705 (byte-defop 168 0 byte-integerp)
708 (byte-defop 175 nil byte-listN)
709 (byte-defop 176 nil byte-concatN)
710 (byte-defop 177 nil byte-insertN)
712 (byte-defop 178 -1 byte-stack-set) ; Stack offset in following one byte.
713 (byte-defop 179 -1 byte-stack-set2) ; Stack offset in following two bytes.
715 ;; If (following one byte & 0x80) == 0
716 ;; discard (following one byte & 0x7F) stack entries
718 ;; discard (following one byte & 0x7F) stack entries _underneath_ TOS
719 ;; (that is, if the operand = 0x83, ... X Y Z T => ... T)
720 (byte-defop 182 nil byte-discardN)
721 ;; `byte-discardN-preserve-tos' is a pseudo-op that gets turned into
722 ;; `byte-discardN' with the high bit in the operand set (by
723 ;; `byte-compile-lapcode').
724 (defconst byte-discardN-preserve-tos byte-discardN)
728 (byte-defop 192 1 byte-constant "for reference to a constant")
729 ;; codes 193-255 are consumed by byte-constant.
730 (defconst byte-constant-limit 64
731 "Exclusive maximum index usable in the `byte-constant' opcode.")
733 (defconst byte-goto-ops '(byte-goto byte-goto-if-nil byte-goto-if-not-nil
734 byte-goto-if-nil-else-pop
735 byte-goto-if-not-nil-else-pop
736 byte-pushcatch byte-pushconditioncase)
737 "List of byte-codes whose offset is a pc.")
739 (defconst byte-goto-always-pop-ops '(byte-goto-if-nil byte-goto-if-not-nil))
741 (byte-extrude-byte-code-vectors)
743 ;;; lapcode generator
745 ;; the byte-compiler now does source -> lapcode -> bytecode instead of
746 ;; source -> bytecode, because it's a lot easier to make optimizations
747 ;; on lapcode than on bytecode.
749 ;; Elements of the lapcode list are of the form (<instruction> . <parameter>)
750 ;; where instruction is a symbol naming a byte-code instruction,
751 ;; and parameter is an argument to that instruction, if any.
753 ;; The instruction can be the pseudo-op TAG, which means that this position
754 ;; in the instruction stream is a target of a goto. (car PARAMETER) will be
755 ;; the PC for this location, and the whole instruction "(TAG pc)" will be the
756 ;; parameter for some goto op.
758 ;; If the operation is varbind, varref, varset or push-constant, then the
759 ;; parameter is (variable/constant . index_in_constant_vector).
761 ;; First, the source code is macroexpanded and optimized in various ways.
762 ;; Then the resultant code is compiled into lapcode. Another set of
763 ;; optimizations are then run over the lapcode. Then the variables and
764 ;; constants referenced by the lapcode are collected and placed in the
765 ;; constants-vector. (This happens now so that variables referenced by dead
766 ;; code don't consume space.) And finally, the lapcode is transformed into
767 ;; compacted byte-code.
769 ;; A distinction is made between variables and constants because the variable-
770 ;; referencing instructions are more sensitive to the variables being near the
771 ;; front of the constants-vector than the constant-referencing instructions.
772 ;; Also, this lets us notice references to free variables.
774 (defmacro byte-compile-push-bytecodes (&rest args)
775 "Push bytes onto BVAR, and increment CVAR by the number of bytes pushed.
776 BVAR and CVAR are variables which are updated after evaluating
779 \(fn BYTE1 BYTE2 ... BYTEn BVAR CVAR)"
780 (let ((byte-exprs (butlast args 2))
781 (bytes-var (car (last args 2)))
782 (pc-var (car (last args))))
783 `(setq ,bytes-var ,(if (null (cdr byte-exprs))
784 `(progn (cl-assert (<= 0 ,(car byte-exprs)))
785 (cons ,@byte-exprs ,bytes-var))
786 `(nconc (list ,@(reverse byte-exprs)) ,bytes-var))
787 ,pc-var (+ ,(length byte-exprs) ,pc-var))))
789 (defmacro byte-compile-push-bytecode-const2 (opcode const2 bytes pc)
790 "Push OPCODE and the two-byte constant CONST2 onto BYTES, and add 3 to PC.
791 CONST2 may be evaluated multiple times."
792 `(byte-compile-push-bytecodes ,opcode (logand ,const2 255) (lsh ,const2 -8)
795 (defun byte-compile-lapcode (lap)
796 "Turns lapcode into bytecode. The lapcode is destroyed."
797 ;; Lapcode modifications: changes the ID of a tag to be the tag's PC.
798 (let ((pc 0) ; Program counter
799 op off ; Operation & offset
800 opcode ; numeric value of OP
801 (bytes '()) ; Put the output bytes here
802 (patchlist nil)) ; List of gotos to patch
803 (dolist (lap-entry lap)
804 (setq op (car lap-entry)
808 (error "Non-symbolic opcode `%s'" op))
813 (if (eq op 'byte-discardN-preserve-tos)
814 ;; byte-discardN-preserve-tos is a pseudo op, which
815 ;; is actually the same as byte-discardN
816 ;; with a modified argument.
819 (cond ((memq op byte-goto-ops)
821 (byte-compile-push-bytecodes opcode nil (cdr off) bytes pc)
822 (push bytes patchlist))
823 ((or (and (consp off)
824 ;; Variable or constant reference
827 (eq op 'byte-constant)))
828 (and (eq op 'byte-constant)
831 (if (< off byte-constant-limit)
832 (byte-compile-push-bytecodes (+ byte-constant off)
834 (byte-compile-push-bytecode-const2 byte-constant2 off
836 ((and (= opcode byte-stack-set)
838 ;; Use the two-byte version of byte-stack-set if the
839 ;; offset is too large for the normal version.
840 (byte-compile-push-bytecode-const2 byte-stack-set2 off
842 ((and (>= opcode byte-listN)
843 (< opcode byte-discardN))
844 ;; These insns all put their operand into one extra byte.
845 (byte-compile-push-bytecodes opcode off bytes pc))
846 ((= opcode byte-discardN)
847 ;; byte-discardN is weird in that it encodes a flag in the
848 ;; top bit of its one-byte argument. If the argument is
849 ;; too large to fit in 7 bits, the opcode can be repeated.
850 (let ((flag (if (eq op 'byte-discardN-preserve-tos) #x80 0)))
852 (byte-compile-push-bytecodes opcode (logior #x7f flag)
854 (setq off (- off #x7f)))
855 (byte-compile-push-bytecodes opcode (logior off flag)
858 ;; opcode that doesn't use OFF
859 (byte-compile-push-bytecodes opcode bytes pc))
860 ((and (eq opcode byte-stack-ref) (eq off 0))
861 ;; (stack-ref 0) is really just another name for `dup'.
862 (debug) ;FIXME: When would this happen?
863 (byte-compile-push-bytecodes byte-dup bytes pc))
864 ;; The following three cases are for the special
865 ;; insns that encode their operand into 0, 1, or 2
866 ;; extra bytes depending on its magnitude.
868 (byte-compile-push-bytecodes (+ opcode off) bytes pc))
870 (byte-compile-push-bytecodes (+ opcode 6) off bytes pc))
872 (byte-compile-push-bytecode-const2 (+ opcode 7) off
874 ;;(if (not (= pc (length bytes)))
875 ;; (error "Compiler error: pc mismatch - %s %s" pc (length bytes)))
876 ;; Patch tag PCs into absolute jumps.
877 (dolist (bytes-tail patchlist)
878 (setq pc (caar bytes-tail)) ; Pick PC from goto's tag.
879 (setcar (cdr bytes-tail) (logand pc 255))
880 (setcar bytes-tail (lsh pc -8))
881 ;; FIXME: Replace this by some workaround.
882 (if (> (car bytes-tail) 255) (error "Bytecode overflow")))
884 (apply 'unibyte-string (nreverse bytes))))
887 ;;; compile-time evaluation
889 (defun byte-compile-cl-file-p (file)
890 "Return non-nil if FILE is one of the CL files."
892 (string-match "^cl\\.el" (file-name-nondirectory file))))
894 (defun byte-compile-eval (form)
895 "Eval FORM and mark the functions defined therein.
896 Each function's symbol gets added to `byte-compile-noruntime-functions'."
897 (let ((hist-orig load-history)
898 (hist-nil-orig current-load-list))
899 (prog1 (eval form lexical-binding)
900 (when (byte-compile-warning-enabled-p 'noruntime)
901 (let ((hist-new load-history)
902 (hist-nil-new current-load-list))
903 ;; Go through load-history, look for newly loaded files
904 ;; and mark all the functions defined therein.
905 (while (and hist-new (not (eq hist-new hist-orig)))
906 (let ((xs (pop hist-new))
908 ;; Make sure the file was not already loaded before.
909 (unless (assoc (car xs) hist-orig)
912 ((and (consp s) (eq t (car s)))
913 (push (cdr s) old-autoloads))
914 ((and (consp s) (memq (car s) '(autoload defun)))
915 (unless (memq (cdr s) old-autoloads)
916 (push (cdr s) byte-compile-noruntime-functions))))))))
917 ;; Go through current-load-list for the locally defined funs.
919 (while (and hist-nil-new (not (eq hist-nil-new hist-nil-orig)))
920 (let ((s (pop hist-nil-new)))
921 (when (and (symbolp s) (not (memq s old-autoloads)))
922 (push s byte-compile-noruntime-functions))
923 (when (and (consp s) (eq t (car s)))
924 (push (cdr s) old-autoloads)))))))
925 (when (byte-compile-warning-enabled-p 'cl-functions)
926 (let ((hist-new load-history))
927 ;; Go through load-history, looking for the cl files.
928 ;; Since new files are added at the start of load-history,
929 ;; we scan the new history until the tail matches the old.
930 (while (and (not byte-compile-cl-functions)
931 hist-new (not (eq hist-new hist-orig)))
932 ;; We used to check if the file had already been loaded,
933 ;; but it is better to check non-nil byte-compile-cl-functions.
934 (and (byte-compile-cl-file-p (car (pop hist-new)))
935 (byte-compile-find-cl-functions))))))))
937 (defun byte-compile-eval-before-compile (form)
938 "Evaluate FORM for `eval-and-compile'."
939 (let ((hist-nil-orig current-load-list))
940 (prog1 (eval form lexical-binding)
941 ;; (eval-and-compile (require 'cl) turns off warnings for cl functions.
942 ;; FIXME Why does it do that - just as a hack?
943 ;; There are other ways to do this nowadays.
944 (let ((tem current-load-list))
945 (while (not (eq tem hist-nil-orig))
946 (when (equal (car tem) '(require . cl))
947 (byte-compile-disable-warning 'cl-functions))
948 (setq tem (cdr tem)))))))
950 ;;; byte compiler messages
952 (defvar byte-compile-current-form nil)
953 (defvar byte-compile-dest-file nil)
954 (defvar byte-compile-current-file nil)
955 (defvar byte-compile-current-group nil)
956 (defvar byte-compile-current-buffer nil)
958 ;; Log something that isn't a warning.
959 (defmacro byte-compile-log (format-string &rest args)
962 (memq byte-optimize-log '(t source))
963 (let ((print-escape-newlines t)
970 (lambda (x) (if (symbolp x) (list 'prin1-to-string x) x))
973 ;; Log something that isn't a warning.
974 (defun byte-compile-log-1 (string)
975 (with-current-buffer byte-compile-log-buffer
976 (let ((inhibit-read-only t))
977 (goto-char (point-max))
978 (byte-compile-warning-prefix nil nil)
979 (cond (noninteractive
980 (message " %s" string))
982 (insert (format "%s\n" string)))))))
984 (defvar byte-compile-read-position nil
985 "Character position we began the last `read' from.")
986 (defvar byte-compile-last-position nil
987 "Last known character position in the input.")
989 ;; copied from gnus-util.el
990 (defsubst byte-compile-delete-first (elt list)
991 (if (eq (car list) elt)
994 (while (and (cdr list)
995 (not (eq (cadr list) elt)))
996 (setq list (cdr list)))
998 (setcdr list (cddr list)))
1001 ;; The purpose of this function is to iterate through the
1002 ;; `read-symbol-positions-list'. Each time we process, say, a
1003 ;; function definition (`defun') we remove `defun' from
1004 ;; `read-symbol-positions-list', and set `byte-compile-last-position'
1005 ;; to that symbol's character position. Similarly, if we encounter a
1006 ;; variable reference, like in (1+ foo), we remove `foo' from the
1007 ;; list. If our current position is after the symbol's position, we
1008 ;; assume we've already passed that point, and look for the next
1009 ;; occurrence of the symbol.
1011 ;; This function should not be called twice for the same occurrence of
1012 ;; a symbol, and it should not be called for symbols generated by the
1013 ;; byte compiler itself; because rather than just fail looking up the
1014 ;; symbol, we may find an occurrence of the symbol further ahead, and
1015 ;; then `byte-compile-last-position' as advanced too far.
1017 ;; So your're probably asking yourself: Isn't this function a
1018 ;; gross hack? And the answer, of course, would be yes.
1019 (defun byte-compile-set-symbol-position (sym &optional allow-previous)
1020 (when byte-compile-read-position
1023 (setq last byte-compile-last-position
1024 entry (assq sym read-symbol-positions-list))
1026 (setq byte-compile-last-position
1027 (+ byte-compile-read-position (cdr entry))
1028 read-symbol-positions-list
1029 (byte-compile-delete-first
1030 entry read-symbol-positions-list)))
1031 (or (and allow-previous
1032 (not (= last byte-compile-last-position)))
1033 (> last byte-compile-last-position)))))))
1035 (defvar byte-compile-last-warned-form nil)
1036 (defvar byte-compile-last-logged-file nil)
1037 (defvar byte-compile-root-dir nil
1038 "Directory relative to which file names in error messages are written.")
1040 ;; FIXME: We should maybe extend abbreviate-file-name with an optional DIR
1041 ;; argument to try and use a relative file-name.
1042 (defun byte-compile-abbreviate-file (file &optional dir)
1043 (let ((f1 (abbreviate-file-name file))
1044 (f2 (file-relative-name file dir)))
1045 (if (< (length f2) (length f1)) f2 f1)))
1047 ;; This is used as warning-prefix for the compiler.
1048 ;; It is always called with the warnings buffer current.
1049 (defun byte-compile-warning-prefix (level entry)
1050 (let* ((inhibit-read-only t)
1051 (dir (or byte-compile-root-dir default-directory))
1052 (file (cond ((stringp byte-compile-current-file)
1053 (format "%s:" (byte-compile-abbreviate-file
1054 byte-compile-current-file dir)))
1055 ((bufferp byte-compile-current-file)
1056 (format "Buffer %s:"
1057 (buffer-name byte-compile-current-file)))
1058 ;; We might be simply loading a file that
1059 ;; contains explicit calls to byte-compile functions.
1060 ((stringp load-file-name)
1061 (format "%s:" (byte-compile-abbreviate-file
1062 load-file-name dir)))
1064 (pos (if (and byte-compile-current-file
1065 (integerp byte-compile-read-position))
1066 (with-current-buffer byte-compile-current-buffer
1069 (goto-char byte-compile-last-position)
1070 (1+ (count-lines (point-min) (point-at-bol))))
1072 (goto-char byte-compile-last-position)
1073 (1+ (current-column)))))
1075 (form (if (eq byte-compile-current-form :end) "end of data"
1076 (or byte-compile-current-form "toplevel form"))))
1077 (when (or (and byte-compile-current-file
1078 (not (equal byte-compile-current-file
1079 byte-compile-last-logged-file)))
1080 (and byte-compile-current-form
1081 (not (eq byte-compile-current-form
1082 byte-compile-last-warned-form))))
1083 (insert (format "\nIn %s:\n" form)))
1085 (insert (format "%s%s" file pos))))
1086 (setq byte-compile-last-logged-file byte-compile-current-file
1087 byte-compile-last-warned-form byte-compile-current-form)
1090 ;; This no-op function is used as the value of warning-series
1091 ;; to tell inner calls to displaying-byte-compile-warnings
1092 ;; not to bind warning-series.
1093 (defun byte-compile-warning-series (&rest _ignore)
1096 ;; (compile-mode) will cause this to be loaded.
1097 (declare-function compilation-forget-errors "compile" ())
1099 ;; Log the start of a file in `byte-compile-log-buffer', and mark it as done.
1100 ;; Return the position of the start of the page in the log buffer.
1101 ;; But do nothing in batch mode.
1102 (defun byte-compile-log-file ()
1103 (and (not (equal byte-compile-current-file byte-compile-last-logged-file))
1104 (not noninteractive)
1105 (with-current-buffer (get-buffer-create byte-compile-log-buffer)
1106 (goto-char (point-max))
1107 (let* ((inhibit-read-only t)
1108 (dir (and byte-compile-current-file
1109 (file-name-directory byte-compile-current-file)))
1110 (was-same (equal default-directory dir))
1114 (insert (format "Leaving directory `%s'\n" default-directory))))
1117 (setq pt (point-marker))
1118 (if byte-compile-current-file
1119 (insert "\f\nCompiling "
1120 (if (stringp byte-compile-current-file)
1121 (concat "file " byte-compile-current-file)
1123 (buffer-name byte-compile-current-file)))
1124 " at " (current-time-string) "\n")
1125 (insert "\f\nCompiling no file at " (current-time-string) "\n"))
1127 (setq default-directory dir)
1129 (insert (format "Entering directory `%s'\n"
1130 default-directory))))
1131 (setq byte-compile-last-logged-file byte-compile-current-file
1132 byte-compile-last-warned-form nil)
1133 ;; Do this after setting default-directory.
1134 (unless (derived-mode-p 'compilation-mode) (compilation-mode))
1135 (compilation-forget-errors)
1138 ;; Log a message STRING in `byte-compile-log-buffer'.
1139 ;; Also log the current function and file if not already done.
1140 (defun byte-compile-log-warning (string &optional fill level)
1141 (let ((warning-prefix-function 'byte-compile-warning-prefix)
1142 (warning-type-format "")
1143 (warning-fill-prefix (if fill " ")))
1144 (display-warning 'bytecomp string level byte-compile-log-buffer)))
1146 (defun byte-compile-warn (format &rest args)
1147 "Issue a byte compiler warning; use (format FORMAT ARGS...) for message."
1148 (setq format (apply 'format format args))
1149 (if byte-compile-error-on-warn
1150 (error "%s" format) ; byte-compile-file catches and logs it
1151 (byte-compile-log-warning format t :warning)))
1153 (defun byte-compile-warn-obsolete (symbol)
1154 "Warn that SYMBOL (a variable or function) is obsolete."
1155 (when (byte-compile-warning-enabled-p 'obsolete)
1156 (let* ((funcp (get symbol 'byte-obsolete-info))
1157 (msg (macroexp--obsolete-warning
1159 (or funcp (get symbol 'byte-obsolete-variable))
1160 (if funcp "function" "variable"))))
1161 (unless (and funcp (memq symbol byte-compile-not-obsolete-funcs))
1162 (byte-compile-warn "%s" msg)))))
1164 (defun byte-compile-report-error (error-info)
1165 "Report Lisp error in compilation. ERROR-INFO is the error data."
1166 (setq byte-compiler-error-flag t)
1167 (byte-compile-log-warning
1168 (error-message-string error-info)
1171 ;;; sanity-checking arglists
1173 (defun byte-compile-fdefinition (name macro-p)
1174 ;; If a function has an entry saying (FUNCTION . t).
1175 ;; that means we know it is defined but we don't know how.
1176 ;; If a function has an entry saying (FUNCTION . nil),
1177 ;; that means treat it as not defined.
1178 (let* ((list (if macro-p
1179 byte-compile-macro-environment
1180 byte-compile-function-environment))
1181 (env (cdr (assq name list))))
1184 (while (and (symbolp fn)
1186 (or (symbolp (symbol-function fn))
1187 (consp (symbol-function fn))
1189 (byte-code-function-p (symbol-function fn)))))
1190 (setq fn (symbol-function fn)))
1191 (let ((advertised (gethash (if (and (symbolp fn) (fboundp fn))
1193 (symbol-function fn)
1195 advertised-signature-table t)))
1199 `(macro lambda ,advertised)
1200 `(lambda ,advertised)))
1201 ((and (not macro-p) (byte-code-function-p fn)) fn)
1202 ((not (consp fn)) nil)
1203 ((eq 'macro (car fn)) (cdr fn))
1205 ((eq 'autoload (car fn)) nil)
1208 (defun byte-compile-arglist-signature (arglist)
1210 ;; New style byte-code arglist.
1212 (cons (logand arglist 127) ;Mandatory.
1213 (if (zerop (logand arglist 128)) ;No &rest.
1214 (lsh arglist -8)))) ;Nonrest.
1215 ;; Old style byte-code, or interpreted function.
1221 (cond ((eq (car arglist) '&optional)
1222 (or opts (setq opts 0)))
1223 ((eq (car arglist) '&rest)
1229 (setq opts (1+ opts))
1230 (setq args (1+ args)))))
1231 (setq arglist (cdr arglist)))
1232 (cons args (if restp nil (if opts (+ args opts) args)))))
1237 (defun byte-compile-arglist-signatures-congruent-p (old new)
1239 (> (car new) (car old)) ; requires more args now
1240 (and (null (cdr old)) ; took rest-args, doesn't any more
1242 (and (cdr new) (cdr old) ; can't take as many args now
1243 (< (cdr new) (cdr old)))
1246 (defun byte-compile-arglist-signature-string (signature)
1247 (cond ((null (cdr signature))
1248 (format "%d+" (car signature)))
1249 ((= (car signature) (cdr signature))
1250 (format "%d" (car signature)))
1251 (t (format "%d-%d" (car signature) (cdr signature)))))
1253 (defun byte-compile-function-warn (f nargs def)
1254 (when (get f 'byte-obsolete-info)
1255 (byte-compile-warn-obsolete f))
1257 ;; Check to see if the function will be available at runtime
1258 ;; and/or remember its arity if it's unknown.
1259 (or (and (or def (fboundp f)) ; might be a subr or autoload.
1260 (not (memq f byte-compile-noruntime-functions)))
1261 (eq f byte-compile-current-form) ; ## This doesn't work
1263 ;; It's a currently-undefined function.
1264 ;; Remember number of args in call.
1265 (let ((cons (assq f byte-compile-unresolved-functions)))
1267 (or (memq nargs (cdr cons))
1268 (push nargs (cdr cons)))
1269 (push (list f nargs)
1270 byte-compile-unresolved-functions)))))
1272 ;; Warn if the form is calling a function with the wrong number of arguments.
1273 (defun byte-compile-callargs-warn (form)
1274 (let* ((def (or (byte-compile-fdefinition (car form) nil)
1275 (byte-compile-fdefinition (car form) t)))
1276 (sig (if (and def (not (eq def t)))
1278 (and (eq (car-safe def) 'macro)
1279 (eq (car-safe (cdr-safe def)) 'lambda)
1280 (setq def (cdr def)))
1281 (byte-compile-arglist-signature
1282 (if (memq (car-safe def) '(declared lambda))
1284 (if (byte-code-function-p def)
1287 (if (subrp (symbol-function (car form)))
1288 (subr-arity (symbol-function (car form))))))
1289 (ncall (length (cdr form))))
1290 ;; Check many or unevalled from subr-arity.
1291 (if (and (cdr-safe sig)
1292 (not (numberp (cdr sig))))
1295 (when (or (< ncall (car sig))
1296 (and (cdr sig) (> ncall (cdr sig))))
1297 (byte-compile-set-symbol-position (car form))
1299 "%s called with %d argument%s, but %s %s"
1301 (if (= 1 ncall) "" "s")
1302 (if (< ncall (car sig))
1305 (byte-compile-arglist-signature-string sig))))
1306 (byte-compile-format-warn form)
1307 (byte-compile-function-warn (car form) (length (cdr form)) def)))
1309 (defun byte-compile-format-warn (form)
1310 "Warn if FORM is `format'-like with inconsistent args.
1311 Applies if head of FORM is a symbol with non-nil property
1312 `byte-compile-format-like' and first arg is a constant string.
1313 Then check the number of format fields matches the number of
1315 (when (and (symbolp (car form))
1316 (stringp (nth 1 form))
1317 (get (car form) 'byte-compile-format-like))
1318 (let ((nfields (with-temp-buffer
1319 (insert (nth 1 form))
1320 (goto-char (point-min))
1322 (while (re-search-forward "%." nil t)
1323 (unless (eq ?% (char-after (1+ (match-beginning 0))))
1326 (nargs (- (length form) 2)))
1327 (unless (= nargs nfields)
1329 "`%s' called with %d args to fill %d format field(s)" (car form)
1332 (dolist (elt '(format message error))
1333 (put elt 'byte-compile-format-like t))
1335 ;; Warn if a custom definition fails to specify :group.
1336 (defun byte-compile-nogroup-warn (form)
1337 (if (and (memq (car form) '(custom-declare-face custom-declare-variable))
1338 byte-compile-current-group)
1339 ;; The group will be provided implicitly.
1341 (let ((keyword-args (cdr (cdr (cdr (cdr form)))))
1343 (or (not (eq (car-safe name) 'quote))
1344 (and (eq (car form) 'custom-declare-group)
1345 (equal name ''emacs))
1346 (plist-get keyword-args :group)
1347 (not (and (consp name) (eq (car name) 'quote)))
1349 "%s for `%s' fails to specify containing group"
1350 (cdr (assq (car form)
1351 '((custom-declare-group . defgroup)
1352 (custom-declare-face . defface)
1353 (custom-declare-variable . defcustom))))
1355 ;; Update the current group, if needed.
1356 (if (and byte-compile-current-file ;Only when compiling a whole file.
1357 (eq (car form) 'custom-declare-group)
1358 (eq (car-safe name) 'quote))
1359 (setq byte-compile-current-group (cadr name))))))
1361 ;; Warn if the function or macro is being redefined with a different
1362 ;; number of arguments.
1363 (defun byte-compile-arglist-warn (name arglist macrop)
1364 (let* ((old (byte-compile-fdefinition name macrop))
1365 (initial (and macrop
1367 byte-compile-initial-macro-environment)))))
1368 ;; Assumes an element of b-c-i-macro-env that is a symbol points
1369 ;; to a defined function. (Bug#8646)
1370 (and initial (symbolp initial)
1371 (setq old (byte-compile-fdefinition initial nil)))
1372 (if (and old (not (eq old t)))
1374 (and (eq 'macro (car-safe old))
1375 (eq 'lambda (car-safe (cdr-safe old)))
1376 (setq old (cdr old)))
1377 (let ((sig1 (byte-compile-arglist-signature
1379 (`(lambda ,args . ,_) args)
1380 (`(closure ,_ ,args . ,_) args)
1381 ((pred byte-code-function-p) (aref old 0))
1383 (sig2 (byte-compile-arglist-signature arglist)))
1384 (unless (byte-compile-arglist-signatures-congruent-p sig1 sig2)
1385 (byte-compile-set-symbol-position name)
1387 "%s %s used to take %s %s, now takes %s"
1388 (if macrop "macro" "function")
1390 (byte-compile-arglist-signature-string sig1)
1391 (if (equal sig1 '(1 . 1)) "argument" "arguments")
1392 (byte-compile-arglist-signature-string sig2)))))
1393 ;; This is the first definition. See if previous calls are compatible.
1394 (let ((calls (assq name byte-compile-unresolved-functions))
1396 (setq byte-compile-unresolved-functions
1397 (delq calls byte-compile-unresolved-functions))
1398 (setq calls (delq t calls)) ;Ignore higher-order uses of the function.
1400 (when (and (symbolp name)
1401 (eq (function-get name 'byte-optimizer)
1402 'byte-compile-inline-expand))
1403 (byte-compile-warn "defsubst `%s' was used before it was defined"
1405 (setq sig (byte-compile-arglist-signature arglist)
1406 nums (sort (copy-sequence (cdr calls)) (function <))
1408 max (car (nreverse nums)))
1409 (when (or (< min (car sig))
1410 (and (cdr sig) (> max (cdr sig))))
1411 (byte-compile-set-symbol-position name)
1413 "%s being defined to take %s%s, but was previously called with %s"
1415 (byte-compile-arglist-signature-string sig)
1416 (if (equal sig '(1 . 1)) " arg" " args")
1417 (byte-compile-arglist-signature-string (cons min max)))))))))
1419 (defvar byte-compile-cl-functions nil
1420 "List of functions defined in CL.")
1422 ;; Can't just add this to cl-load-hook, because that runs just before
1423 ;; the forms from cl.el get added to load-history.
1424 (defun byte-compile-find-cl-functions ()
1425 (unless byte-compile-cl-functions
1426 (dolist (elt load-history)
1427 (and (byte-compile-cl-file-p (car elt))
1428 (dolist (e (cdr elt))
1429 ;; Includes the cl-foo functions that cl autoloads.
1430 (when (memq (car-safe e) '(autoload defun))
1431 (push (cdr e) byte-compile-cl-functions)))))))
1433 (defun byte-compile-cl-warn (form)
1434 "Warn if FORM is a call of a function from the CL package."
1435 (let ((func (car-safe form)))
1436 (if (and byte-compile-cl-functions
1437 (memq func byte-compile-cl-functions)
1438 ;; Aliases which won't have been expanded at this point.
1439 ;; These aren't all aliases of subrs, so not trivial to
1440 ;; avoid hardwiring the list.
1442 '(cl--block-wrapper cl--block-throw
1443 multiple-value-call nth-value
1444 copy-seq first second rest endp cl-member
1445 ;; These are included in generated code
1446 ;; that can't be called except at compile time
1447 ;; or unless cl is loaded anyway.
1448 cl--defsubst-expand cl-struct-setf-expander
1449 ;; These would sometimes be warned about
1450 ;; but such warnings are never useful,
1451 ;; so don't warn about them.
1452 macroexpand cl-macroexpand-all
1453 cl--compiling-file))))
1454 (byte-compile-warn "function `%s' from cl package called at runtime"
1458 (defun byte-compile-print-syms (str1 strn syms)
1460 (byte-compile-set-symbol-position (car syms) t))
1461 (cond ((and (cdr syms) (not noninteractive))
1466 (setq s (symbol-name (pop syms))
1467 L (+ L (length s) 2))
1468 (if (< L (1- fill-column))
1469 (setq str (concat str " " s (and syms ",")))
1470 (setq str (concat str "\n " s (and syms ","))
1471 L (+ (length s) 4))))
1472 (byte-compile-warn "%s" str)))
1474 (byte-compile-warn "%s %s"
1476 (mapconcat #'symbol-name syms ", ")))
1479 (byte-compile-warn str1 (car syms)))))
1481 ;; If we have compiled any calls to functions which are not known to be
1482 ;; defined, issue a warning enumerating them.
1483 ;; `unresolved' in the list `byte-compile-warnings' disables this.
1484 (defun byte-compile-warn-about-unresolved-functions ()
1485 (when (byte-compile-warning-enabled-p 'unresolved)
1486 (let ((byte-compile-current-form :end)
1489 ;; Separate the functions that will not be available at runtime
1490 ;; from the truly unresolved ones.
1491 (dolist (f byte-compile-unresolved-functions)
1493 (if (fboundp f) (push f noruntime) (push f unresolved)))
1494 ;; Complain about the no-run-time functions
1495 (byte-compile-print-syms
1496 "the function `%s' might not be defined at runtime."
1497 "the following functions might not be defined at runtime:"
1499 ;; Complain about the unresolved functions
1500 (byte-compile-print-syms
1501 "the function `%s' is not known to be defined."
1502 "the following functions are not known to be defined:"
1507 ;; Dynamically bound in byte-compile-from-buffer.
1508 ;; NB also used in cl.el and cl-macs.el.
1509 (defvar byte-compile--outbuffer)
1511 (defmacro byte-compile-close-variables (&rest body)
1514 ;; Close over these variables to encapsulate the
1515 ;; compilation state
1517 (byte-compile-macro-environment
1518 ;; Copy it because the compiler may patch into the
1519 ;; macroenvironment.
1520 (copy-alist byte-compile-initial-macro-environment))
1521 (byte-compile--outbuffer nil)
1522 (byte-compile-function-environment nil)
1523 (byte-compile-bound-variables nil)
1524 (byte-compile-lexical-variables nil)
1525 (byte-compile-const-variables nil)
1526 (byte-compile-free-references nil)
1527 (byte-compile-free-assignments nil)
1529 ;; Close over these variables so that `byte-compiler-options'
1530 ;; can change them on a per-file basis.
1532 (byte-compile-verbose byte-compile-verbose)
1533 (byte-optimize byte-optimize)
1534 (byte-compile-dynamic byte-compile-dynamic)
1535 (byte-compile-dynamic-docstrings
1536 byte-compile-dynamic-docstrings)
1537 ;; (byte-compile-generate-emacs19-bytecodes
1538 ;; byte-compile-generate-emacs19-bytecodes)
1539 (byte-compile-warnings byte-compile-warnings)
1543 (defmacro displaying-byte-compile-warnings (&rest body)
1545 `(let* ((--displaying-byte-compile-warnings-fn (lambda () ,@body))
1546 (warning-series-started
1547 (and (markerp warning-series)
1548 (eq (marker-buffer warning-series)
1549 (get-buffer byte-compile-log-buffer)))))
1550 (byte-compile-find-cl-functions)
1551 (if (or (eq warning-series 'byte-compile-warning-series)
1552 warning-series-started)
1553 ;; warning-series does come from compilation,
1554 ;; so don't bind it, but maybe do set it.
1556 ;; Log the file name. Record position of that text.
1557 (setq tem (byte-compile-log-file))
1558 (unless warning-series-started
1559 (setq warning-series (or tem 'byte-compile-warning-series)))
1560 (if byte-compile-debug
1561 (funcall --displaying-byte-compile-warnings-fn)
1562 (condition-case error-info
1563 (funcall --displaying-byte-compile-warnings-fn)
1564 (error (byte-compile-report-error error-info)))))
1565 ;; warning-series does not come from compilation, so bind it.
1566 (let ((warning-series
1567 ;; Log the file name. Record position of that text.
1568 (or (byte-compile-log-file) 'byte-compile-warning-series)))
1569 (if byte-compile-debug
1570 (funcall --displaying-byte-compile-warnings-fn)
1571 (condition-case error-info
1572 (funcall --displaying-byte-compile-warnings-fn)
1573 (error (byte-compile-report-error error-info))))))))
1576 (defun byte-force-recompile (directory)
1577 "Recompile every `.el' file in DIRECTORY that already has a `.elc' file.
1578 Files in subdirectories of DIRECTORY are processed also."
1579 (interactive "DByte force recompile (directory): ")
1580 (byte-recompile-directory directory nil t))
1583 (defun byte-recompile-directory (directory &optional arg force)
1584 "Recompile every `.el' file in DIRECTORY that needs recompilation.
1585 This happens when a `.elc' file exists but is older than the `.el' file.
1586 Files in subdirectories of DIRECTORY are processed also.
1588 If the `.elc' file does not exist, normally this function *does not*
1589 compile the corresponding `.el' file. However, if the prefix argument
1590 ARG is 0, that means do compile all those files. A nonzero
1591 ARG means ask the user, for each such `.el' file, whether to
1592 compile it. A nonzero ARG also means ask about each subdirectory
1595 If the third argument FORCE is non-nil, recompile every `.el' file
1596 that already has a `.elc' file."
1597 (interactive "DByte recompile directory: \nP")
1598 (if arg (setq arg (prefix-numeric-value arg)))
1602 (force-mode-line-update))
1603 (with-current-buffer (get-buffer-create byte-compile-log-buffer)
1604 (setq default-directory (expand-file-name directory))
1605 ;; compilation-mode copies value of default-directory.
1606 (unless (eq major-mode 'compilation-mode)
1608 (let ((directories (list default-directory))
1609 (default-directory default-directory)
1615 (displaying-byte-compile-warnings
1617 (setq directory (car directories))
1618 (message "Checking %s..." directory)
1619 (dolist (file (directory-files directory))
1620 (let ((source (expand-file-name file directory)))
1621 (if (file-directory-p source)
1622 (and (not (member file '("RCS" "CVS")))
1623 (not (eq ?\. (aref file 0)))
1624 (not (file-symlink-p source))
1625 ;; This file is a subdirectory. Handle them differently.
1626 (or (null arg) (eq 0 arg)
1627 (y-or-n-p (concat "Check " source "? ")))
1628 (setq directories (nconc directories (list source))))
1629 ;; It is an ordinary file. Decide whether to compile it.
1630 (if (and (string-match emacs-lisp-file-regexp source)
1631 ;; The next 2 tests avoid compiling lock files
1632 (file-readable-p source)
1633 (not (string-match "\\`\\.#" file))
1634 (not (auto-save-file-name-p source))
1635 (not (string-equal dir-locals-file
1636 (file-name-nondirectory source))))
1638 (pcase (byte-recompile-file source force arg)
1639 (`no-byte-compile skip-count)
1643 (message "Checking %s..." directory))
1644 (if (not (eq last-dir directory))
1645 (setq last-dir directory
1646 dir-count (1+ dir-count)))
1648 (setq directories (cdr directories))))
1649 (message "Done (Total of %d file%s compiled%s%s%s)"
1650 file-count (if (= file-count 1) "" "s")
1651 (if (> fail-count 0) (format ", %d failed" fail-count) "")
1652 (if (> skip-count 0) (format ", %d skipped" skip-count) "")
1654 (format " in %d directories" dir-count) "")))))
1656 (defvar no-byte-compile nil
1657 "Non-nil to prevent byte-compiling of Emacs Lisp code.
1658 This is normally set in local file variables at the end of the elisp file:
1660 \;; Local Variables:\n;; no-byte-compile: t\n;; End: ") ;Backslash for compile-main.
1661 ;;;###autoload(put 'no-byte-compile 'safe-local-variable 'booleanp)
1663 (defun byte-recompile-file (filename &optional force arg load)
1664 "Recompile FILENAME file if it needs recompilation.
1665 This happens when its `.elc' file is older than itself.
1667 If the `.elc' file exists and is up-to-date, normally this function
1668 *does not* compile FILENAME. If the prefix argument FORCE is non-nil,
1669 however, it compiles FILENAME even if the destination already
1670 exists and is up-to-date.
1672 If the `.elc' file does not exist, normally this function *does not*
1673 compile FILENAME. If optional argument ARG is 0, it compiles
1674 the input file even if the `.elc' file does not exist.
1675 Any other non-nil value of ARG means to ask the user.
1677 If optional argument LOAD is non-nil, loads the file after compiling.
1679 If compilation is needed, this functions returns the result of
1680 `byte-compile-file'; otherwise it returns 'no-byte-compile."
1682 (let ((file buffer-file-name)
1686 (derived-mode-p 'emacs-lisp-mode)
1687 (setq file-name (file-name-nondirectory file)
1688 file-dir (file-name-directory file)))
1689 (list (read-file-name (if current-prefix-arg
1690 "Byte compile file: "
1691 "Byte recompile file: ")
1692 file-dir file-name nil)
1693 current-prefix-arg)))
1694 (let ((dest (byte-compile-dest-file filename))
1695 ;; Expand now so we get the current buffer's defaults
1696 (filename (expand-file-name filename)))
1697 (if (if (file-exists-p dest)
1698 ;; File was already compiled
1699 ;; Compile if forced to, or filename newer
1701 (file-newer-than-file-p filename dest))
1704 (y-or-n-p (concat "Compile "
1707 (if (and noninteractive (not byte-compile-verbose))
1708 (message "Compiling %s..." filename))
1709 (byte-compile-file filename load))
1711 (load (if (file-exists-p dest) dest filename)))
1714 (defvar byte-compile-level 0 ; bug#13787
1715 "Depth of a recursive byte compilation.")
1718 (defun byte-compile-file (filename &optional load)
1719 "Compile a file of Lisp code named FILENAME into a file of byte code.
1720 The output file's name is generated by passing FILENAME to the
1721 function `byte-compile-dest-file' (which see).
1722 With prefix arg (noninteractively: 2nd arg), LOAD the file after compiling.
1723 The value is non-nil if there were no errors, nil if errors."
1724 ;; (interactive "fByte compile file: \nP")
1726 (let ((file buffer-file-name)
1729 (derived-mode-p 'emacs-lisp-mode)
1730 (setq file-dir (file-name-directory file)))
1731 (list (read-file-name (if current-prefix-arg
1732 "Byte compile and load file: "
1733 "Byte compile file: ")
1734 file-dir buffer-file-name nil)
1735 current-prefix-arg)))
1736 ;; Expand now so we get the current buffer's defaults
1737 (setq filename (expand-file-name filename))
1739 ;; If we're compiling a file that's in a buffer and is modified, offer
1740 ;; to save it first.
1742 (let ((b (get-file-buffer (expand-file-name filename))))
1743 (if (and b (buffer-modified-p b)
1744 (y-or-n-p (format "Save buffer %s first? " (buffer-name b))))
1745 (with-current-buffer b (save-buffer)))))
1747 ;; Force logging of the file name for each file compiled.
1748 (setq byte-compile-last-logged-file nil)
1749 (let ((byte-compile-current-file filename)
1750 (byte-compile-current-group nil)
1751 (set-auto-coding-for-load t)
1752 target-file input-buffer output-buffer
1753 byte-compile-dest-file)
1754 (setq target-file (byte-compile-dest-file filename))
1755 (setq byte-compile-dest-file target-file)
1756 (with-current-buffer
1757 ;; It would be cleaner to use a temp buffer, but if there was
1758 ;; an error, we leave this buffer around for diagnostics.
1759 ;; Its name is documented in the lispref.
1760 (setq input-buffer (get-buffer-create
1761 (concat " *Compiler Input*"
1762 (if (zerop byte-compile-level) ""
1763 (format "-%s" byte-compile-level)))))
1765 (setq buffer-file-coding-system nil)
1766 ;; Always compile an Emacs Lisp file as multibyte
1767 ;; unless the file itself forces unibyte with -*-coding: raw-text;-*-
1768 (set-buffer-multibyte t)
1769 (insert-file-contents filename)
1770 ;; Mimic the way after-insert-file-set-coding can make the
1771 ;; buffer unibyte when visiting this file.
1772 (when (or (eq last-coding-system-used 'no-conversion)
1773 (eq (coding-system-type last-coding-system-used) 5))
1774 ;; For coding systems no-conversion and raw-text...,
1775 ;; edit the buffer as unibyte.
1776 (set-buffer-multibyte nil))
1777 ;; Run hooks including the uncompression hook.
1778 ;; If they change the file name, then change it for the output also.
1779 (let ((buffer-file-name filename)
1780 (dmm (default-value 'major-mode))
1781 ;; Ignore unsafe local variables.
1782 ;; We only care about a few of them for our purposes.
1783 (enable-local-variables :safe)
1784 (enable-local-eval nil))
1787 (setq-default major-mode 'emacs-lisp-mode)
1788 ;; Arg of t means don't alter enable-local-variables.
1790 (setq-default major-mode dmm))
1791 ;; There may be a file local variable setting (bug#10419).
1792 (setq buffer-read-only nil
1793 filename buffer-file-name))
1794 ;; Don't inherit lexical-binding from caller (bug#12938).
1795 (unless (local-variable-p 'lexical-binding)
1796 (setq-local lexical-binding nil))
1797 ;; Set the default directory, in case an eval-when-compile uses it.
1798 (setq default-directory (file-name-directory filename)))
1799 ;; Check if the file's local variables explicitly specify not to
1800 ;; compile this file.
1801 (if (with-current-buffer input-buffer no-byte-compile)
1803 ;; (message "%s not compiled because of `no-byte-compile: %s'"
1804 ;; (byte-compile-abbreviate-file filename)
1805 ;; (with-current-buffer input-buffer no-byte-compile))
1806 (when (file-exists-p target-file)
1807 (message "%s deleted because of `no-byte-compile: %s'"
1808 (byte-compile-abbreviate-file target-file)
1809 (buffer-local-value 'no-byte-compile input-buffer))
1810 (condition-case nil (delete-file target-file) (error nil)))
1811 ;; We successfully didn't compile this file.
1813 (when byte-compile-verbose
1814 (message "Compiling %s..." filename))
1815 (setq byte-compiler-error-flag nil)
1816 ;; It is important that input-buffer not be current at this call,
1817 ;; so that the value of point set in input-buffer
1818 ;; within byte-compile-from-buffer lingers in that buffer.
1820 (save-current-buffer
1821 (let ((byte-compile-level (1+ byte-compile-level)))
1822 (byte-compile-from-buffer input-buffer))))
1823 (if byte-compiler-error-flag
1825 (when byte-compile-verbose
1826 (message "Compiling %s...done" filename))
1827 (kill-buffer input-buffer)
1828 (with-current-buffer output-buffer
1829 (goto-char (point-max))
1830 (insert "\n") ; aaah, unix.
1831 (if (file-writable-p target-file)
1832 ;; We must disable any code conversion here.
1833 (let* ((coding-system-for-write 'no-conversion)
1834 ;; Write to a tempfile so that if another Emacs
1835 ;; process is trying to load target-file (eg in a
1836 ;; parallel bootstrap), it does not risk getting a
1837 ;; half-finished file. (Bug#4196)
1838 (tempfile (make-temp-name target-file))
1840 (cons (lambda () (ignore-errors (delete-file tempfile)))
1842 (write-region (point-min) (point-max) tempfile nil 1)
1843 ;; This has the intentional side effect that any
1844 ;; hard-links to target-file continue to
1845 ;; point to the old file (this makes it possible
1846 ;; for installed files to share disk space with
1847 ;; the build tree, without causing problems when
1848 ;; emacs-lisp files in the build tree are
1849 ;; recompiled). Previously this was accomplished by
1850 ;; deleting target-file before writing it.
1851 (rename-file tempfile target-file t)
1852 (message "Wrote %s" target-file))
1853 ;; This is just to give a better error message than write-region
1855 (list "Opening output file"
1856 (if (file-exists-p target-file)
1857 "cannot overwrite file"
1858 "directory not writable or nonexistent")
1860 (kill-buffer (current-buffer)))
1861 (if (and byte-compile-generate-call-tree
1862 (or (eq t byte-compile-generate-call-tree)
1863 (y-or-n-p (format "Report call tree for %s? "
1866 (display-call-tree filename)))
1871 ;;; compiling a single function
1873 (defun compile-defun (&optional arg)
1874 "Compile and evaluate the current top-level form.
1875 Print the result in the echo area.
1876 With argument ARG, insert value in current buffer after the form."
1880 (beginning-of-defun)
1881 (let* ((byte-compile-current-file nil)
1882 (byte-compile-current-buffer (current-buffer))
1883 (byte-compile-read-position (point))
1884 (byte-compile-last-position byte-compile-read-position)
1885 (byte-compile-last-warned-form 'nothing)
1887 (let ((read-with-symbol-positions (current-buffer))
1888 (read-symbol-positions-list nil))
1889 (displaying-byte-compile-warnings
1890 (byte-compile-sexp (read (current-buffer)))))
1893 (message "Compiling from buffer... done.")
1894 (prin1 value (current-buffer))
1896 ((message "%s" (prin1-to-string value)))))))
1898 (defun byte-compile-from-buffer (inbuffer)
1899 (let ((byte-compile-current-buffer inbuffer)
1900 (byte-compile-read-position nil)
1901 (byte-compile-last-position nil)
1902 ;; Prevent truncation of flonums and lists as we read and print them
1903 (float-output-format nil)
1904 (case-fold-search nil)
1907 ;; Prevent edebug from interfering when we compile
1908 ;; and put the output into a file.
1909 ;; (edebug-all-defs nil)
1910 ;; (edebug-all-forms nil)
1911 ;; Simulate entry to byte-compile-top-level
1912 (byte-compile-constants nil)
1913 (byte-compile-variables nil)
1914 (byte-compile-tag-number 0)
1915 (byte-compile-depth 0)
1916 (byte-compile-maxdepth 0)
1917 (byte-compile-output nil)
1918 ;; This allows us to get the positions of symbols read; it's
1919 ;; new in Emacs 22.1.
1920 (read-with-symbol-positions inbuffer)
1921 (read-symbol-positions-list nil)
1922 ;; #### This is bound in b-c-close-variables.
1923 ;; (byte-compile-warnings byte-compile-warnings)
1925 (byte-compile-close-variables
1926 (with-current-buffer
1927 (setq byte-compile--outbuffer
1929 (concat " *Compiler Output*"
1930 (if (<= byte-compile-level 1) ""
1931 (format "-%s" (1- byte-compile-level))))))
1932 (set-buffer-multibyte t)
1934 ;; (emacs-lisp-mode)
1935 (setq case-fold-search nil))
1936 (displaying-byte-compile-warnings
1937 (with-current-buffer inbuffer
1938 (and byte-compile-current-file
1939 (byte-compile-insert-header byte-compile-current-file
1940 byte-compile--outbuffer))
1941 (goto-char (point-min))
1942 ;; Should we always do this? When calling multiple files, it
1943 ;; would be useful to delay this warning until all have been
1944 ;; compiled. A: Yes! b-c-u-f might contain dross from a
1945 ;; previous byte-compile.
1946 (setq byte-compile-unresolved-functions nil)
1948 ;; Compile the forms from the input buffer.
1950 (while (progn (skip-chars-forward " \t\n\^l")
1954 (setq byte-compile-read-position (point)
1955 byte-compile-last-position byte-compile-read-position)
1956 (let* ((old-style-backquotes nil)
1957 (form (read inbuffer)))
1958 ;; Warn about the use of old-style backquotes.
1959 (when old-style-backquotes
1960 (byte-compile-warn "!! The file uses old-style backquotes !!
1961 This functionality has been obsolete for more than 10 years already
1962 and will be removed soon. See (elisp)Backquote in the manual."))
1963 (byte-compile-toplevel-file-form form)))
1964 ;; Compile pending forms at end of file.
1965 (byte-compile-flush-pending)
1966 ;; Make warnings about unresolved functions
1967 ;; give the end of the file as their position.
1968 (setq byte-compile-last-position (point-max))
1969 (byte-compile-warn-about-unresolved-functions))
1970 ;; Fix up the header at the front of the output
1971 ;; if the buffer contains multibyte characters.
1972 (and byte-compile-current-file
1973 (with-current-buffer byte-compile--outbuffer
1974 (byte-compile-fix-header byte-compile-current-file))))
1975 byte-compile--outbuffer)))
1977 (defun byte-compile-fix-header (_filename)
1978 "If the current buffer has any multibyte characters, insert a version test."
1979 (when (< (point-max) (position-bytes (point-max)))
1980 (goto-char (point-min))
1981 ;; Find the comment that describes the version condition.
1982 (search-forward "\n;;; This file uses")
1983 (narrow-to-region (line-beginning-position) (point-max))
1984 ;; Find the first line of ballast semicolons.
1985 (search-forward ";;;;;;;;;;")
1987 (narrow-to-region (point-min) (point))
1988 (let ((old-header-end (point))
1989 (minimum-version "23")
1991 (delete-region (point-min) (point-max))
1993 ";;; This file contains utf-8 non-ASCII characters,\n"
1994 ";;; and so cannot be loaded into Emacs 22 or earlier.\n"
1995 ;; Have to check if emacs-version is bound so that this works
1996 ;; in files loaded early in loadup.el.
1997 "(and (boundp 'emacs-version)\n"
1998 ;; If there is a name at the end of emacs-version,
1999 ;; don't try to check the version number.
2000 " (< (aref emacs-version (1- (length emacs-version))) ?A)\n"
2001 (format " (string-lessp emacs-version \"%s\")\n" minimum-version)
2002 ;; Because the header must fit in a fixed width, we cannot
2003 ;; insert arbitrary-length file names (Bug#11585).
2004 " (error \"`%s' was compiled for "
2005 (format "Emacs %s or later\" #$))\n\n" minimum-version))
2006 ;; Now compensate for any change in size, to make sure all
2007 ;; positions in the file remain valid.
2008 (setq delta (- (point-max) old-header-end))
2009 (goto-char (point-max))
2011 (delete-char delta))))
2013 (defun byte-compile-insert-header (_filename outbuffer)
2014 "Insert a header at the start of OUTBUFFER.
2015 Call from the source buffer."
2016 (let ((dynamic-docstrings byte-compile-dynamic-docstrings)
2017 (dynamic byte-compile-dynamic)
2018 (optimize byte-optimize))
2019 (with-current-buffer outbuffer
2020 (goto-char (point-min))
2021 ;; The magic number of .elc files is ";ELC", or 0x3B454C43. After
2022 ;; that is the file-format version number (18, 19, 20, or 23) as a
2023 ;; byte, followed by some nulls. The primary motivation for doing
2024 ;; this is to get some binary characters up in the first line of
2025 ;; the file so that `diff' will simply say "Binary files differ"
2026 ;; instead of actually doing a diff of two .elc files. An extra
2027 ;; benefit is that you can add this to /etc/magic:
2028 ;; 0 string ;ELC GNU Emacs Lisp compiled file,
2029 ;; >4 byte x version %d
2031 ";ELC" 23 "\000\000\000\n"
2033 ";;; in Emacs version " emacs-version "\n"
2036 ((eq optimize 'source) " source-level optimization only")
2037 ((eq optimize 'byte) " byte-level optimization only")
2038 (optimize " all optimizations")
2039 (t "out optimization"))
2041 (if dynamic ";;; Function definitions are lazy-loaded.\n"
2043 "\n;;; This file uses "
2044 (if dynamic-docstrings
2045 "dynamic docstrings, first added in Emacs 19.29"
2046 "opcodes that do not exist in Emacs 18")
2048 ;; Note that byte-compile-fix-header may change this.
2049 ";;; This file does not contain utf-8 non-ASCII characters,\n"
2050 ";;; and so can be loaded in Emacs versions earlier than 23.\n\n"
2051 ;; Insert semicolons as ballast, so that byte-compile-fix-header
2052 ;; can delete them so as to keep the buffer positions
2053 ;; constant for the actual compiled code.
2054 ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n"
2055 ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\n\n"))))
2057 (defun byte-compile-output-file-form (form)
2058 ;; Write the given form to the output buffer, being careful of docstrings
2059 ;; in defvar, defvaralias, defconst, autoload and
2060 ;; custom-declare-variable because make-docfile is so amazingly stupid.
2061 ;; defalias calls are output directly by byte-compile-file-form-defmumble;
2062 ;; it does not pay to first build the defalias in defmumble and then parse
2064 (let ((print-escape-newlines t)
2069 (print-circle ; Handle circular data structures.
2070 (not byte-compile-disable-print-circle)))
2071 (if (and (memq (car-safe form) '(defvar defvaralias defconst
2072 autoload custom-declare-variable))
2073 (stringp (nth 3 form)))
2074 (byte-compile-output-docform nil nil '("\n(" 3 ")") form nil
2076 '(defvaralias autoload
2077 custom-declare-variable)))
2078 (princ "\n" byte-compile--outbuffer)
2079 (prin1 form byte-compile--outbuffer)
2082 (defvar byte-compile--for-effect)
2084 (defun byte-compile-output-docform (preface name info form specindex quoted)
2085 "Print a form with a doc string. INFO is (prefix doc-index postfix).
2086 If PREFACE and NAME are non-nil, print them too,
2087 before INFO and the FORM but after the doc string itself.
2088 If SPECINDEX is non-nil, it is the index in FORM
2089 of the function bytecode string. In that case,
2090 we output that argument and the following argument
2091 \(the constants vector) together, for lazy loading.
2092 QUOTED says that we have to put a quote before the
2093 list that represents a doc string reference.
2094 `defvaralias', `autoload' and `custom-declare-variable' need that."
2095 ;; We need to examine byte-compile-dynamic-docstrings
2096 ;; in the input buffer (now current), not in the output buffer.
2097 (let ((dynamic-docstrings byte-compile-dynamic-docstrings))
2098 (with-current-buffer byte-compile--outbuffer
2101 ;; Insert the doc string, and make it a comment with #@LENGTH.
2102 (and (>= (nth 1 info) 0)
2105 ;; Make the doc string start at beginning of line
2106 ;; for make-docfile's sake.
2109 (byte-compile-output-as-comment
2110 (nth (nth 1 info) form) nil))
2111 ;; If the doc string starts with * (a user variable),
2113 (if (and (stringp (nth (nth 1 info) form))
2114 (> (length (nth (nth 1 info) form)) 0)
2115 (eq (aref (nth (nth 1 info) form) 0) ?*))
2116 (setq position (- position)))))
2121 (prin1 name byte-compile--outbuffer)))
2123 (let ((print-continuous-numbering t)
2126 ;; FIXME: The bindings below are only needed for when we're
2127 ;; called from ...-defmumble.
2128 (print-escape-newlines t)
2133 (print-circle ; Handle circular data structures.
2134 (not byte-compile-disable-print-circle)))
2135 (prin1 (car form) byte-compile--outbuffer)
2136 (while (setq form (cdr form))
2137 (setq index (1+ index))
2139 (cond ((and (numberp specindex) (= index specindex)
2140 ;; Don't handle the definition dynamically
2141 ;; if it refers (or might refer)
2142 ;; to objects already output
2143 ;; (for instance, gensyms in the arg list).
2145 (when (hash-table-p print-number-table)
2146 (maphash (lambda (_k v) (if v (setq non-nil t)))
2147 print-number-table))
2149 ;; Output the byte code and constants specially
2150 ;; for lazy dynamic loading.
2152 (byte-compile-output-as-comment
2153 (cons (car form) (nth 1 form))
2155 (princ (format "(#$ . %d) nil" position)
2156 byte-compile--outbuffer)
2157 (setq form (cdr form))
2158 (setq index (1+ index))))
2159 ((= index (nth 1 info))
2161 (princ (format (if quoted "'(#$ . %d)" "(#$ . %d)")
2163 byte-compile--outbuffer)
2164 (let ((print-escape-newlines nil))
2165 (goto-char (prog1 (1+ (point))
2167 byte-compile--outbuffer)))
2169 (goto-char (point-max)))))
2171 (prin1 (car form) byte-compile--outbuffer)))))
2172 (insert (nth 2 info)))))
2175 (defun byte-compile-keep-pending (form &optional handler)
2176 (if (memq byte-optimize '(t source))
2177 (setq form (byte-optimize-form form t)))
2179 (let ((byte-compile--for-effect t))
2180 ;; To avoid consing up monstrously large forms at load time, we split
2181 ;; the output regularly.
2182 (and (memq (car-safe form) '(fset defalias))
2183 (nthcdr 300 byte-compile-output)
2184 (byte-compile-flush-pending))
2185 (funcall handler form)
2186 (if byte-compile--for-effect
2187 (byte-compile-discard)))
2188 (byte-compile-form form t))
2191 (defun byte-compile-flush-pending ()
2192 (if byte-compile-output
2193 (let ((form (byte-compile-out-toplevel t 'file)))
2194 (cond ((eq (car-safe form) 'progn)
2195 (mapc 'byte-compile-output-file-form (cdr form)))
2197 (byte-compile-output-file-form form)))
2198 (setq byte-compile-constants nil
2199 byte-compile-variables nil
2200 byte-compile-depth 0
2201 byte-compile-maxdepth 0
2202 byte-compile-output nil))))
2204 (defvar byte-compile-force-lexical-warnings nil)
2206 (defun byte-compile-preprocess (form &optional _for-effect)
2207 (setq form (macroexpand-all form byte-compile-macro-environment))
2208 ;; FIXME: We should run byte-optimize-form here, but it currently does not
2209 ;; recurse through all the code, so we'd have to fix this first.
2210 ;; Maybe a good fix would be to merge byte-optimize-form into
2212 ;; (if (memq byte-optimize '(t source))
2213 ;; (setq form (byte-optimize-form form for-effect)))
2215 (lexical-binding (cconv-closure-convert form))
2216 (byte-compile-force-lexical-warnings (cconv-warnings-only form))
2219 ;; byte-hunk-handlers cannot call this!
2220 (defun byte-compile-toplevel-file-form (top-level-form)
2221 (byte-compile-recurse-toplevel
2224 (let ((byte-compile-current-form nil)) ; close over this for warnings.
2225 (byte-compile-file-form (byte-compile-preprocess form t))))))
2227 ;; byte-hunk-handlers can call this.
2228 (defun byte-compile-file-form (form)
2230 (cond ((and (consp form)
2231 (symbolp (car form))
2232 (setq handler (get (car form) 'byte-hunk-handler)))
2233 (cond ((setq form (funcall handler form))
2234 (byte-compile-flush-pending)
2235 (byte-compile-output-file-form form))))
2237 (byte-compile-keep-pending form)))))
2239 ;; Functions and variables with doc strings must be output separately,
2240 ;; so make-docfile can recognize them. Most other things can be output
2243 (put 'autoload 'byte-hunk-handler 'byte-compile-file-form-autoload)
2244 (defun byte-compile-file-form-autoload (form)
2245 (and (let ((form form))
2246 (while (if (setq form (cdr form)) (macroexp-const-p (car form))))
2247 (null form)) ;Constants only
2248 (memq (eval (nth 5 form)) '(t macro)) ;Macro
2249 (eval form)) ;Define the autoload.
2250 ;; Avoid undefined function warnings for the autoload.
2252 (`',(and (pred symbolp) funsym)
2253 ;; Don't add it if it's already defined. Otherwise, it might
2254 ;; hide the actual definition. However, do remove any entry from
2255 ;; byte-compile-noruntime-functions, in case we have an autoload
2256 ;; of foo-func following an (eval-when-compile (require 'foo)).
2257 (unless (fboundp funsym)
2258 (push (cons funsym (cons 'autoload (cdr (cdr form))))
2259 byte-compile-function-environment))
2260 ;; If an autoload occurs _before_ the first call to a function,
2261 ;; byte-compile-callargs-warn does not add an entry to
2262 ;; byte-compile-unresolved-functions. Here we mimic the logic
2263 ;; of byte-compile-callargs-warn so as not to warn if the
2264 ;; autoload comes _after_ the function call.
2265 ;; Alternatively, similar logic could go in
2266 ;; byte-compile-warn-about-unresolved-functions.
2267 (if (memq funsym byte-compile-noruntime-functions)
2268 (setq byte-compile-noruntime-functions
2269 (delq funsym byte-compile-noruntime-functions)
2270 byte-compile-noruntime-functions)
2271 (setq byte-compile-unresolved-functions
2272 (delq (assq funsym byte-compile-unresolved-functions)
2273 byte-compile-unresolved-functions)))))
2274 (if (stringp (nth 3 form))
2276 ;; No doc string, so we can compile this as a normal form.
2277 (byte-compile-keep-pending form 'byte-compile-normal-call)))
2279 (put 'defvar 'byte-hunk-handler 'byte-compile-file-form-defvar)
2280 (put 'defconst 'byte-hunk-handler 'byte-compile-file-form-defvar)
2282 (defun byte-compile--declare-var (sym)
2283 (when (and (symbolp sym)
2284 (not (string-match "[-*/:$]" (symbol-name sym)))
2285 (byte-compile-warning-enabled-p 'lexical))
2286 (byte-compile-warn "global/dynamic var `%s' lacks a prefix"
2288 (when (memq sym byte-compile-lexical-variables)
2289 (setq byte-compile-lexical-variables
2290 (delq sym byte-compile-lexical-variables))
2291 (byte-compile-warn "Variable `%S' declared after its first use" sym))
2292 (push sym byte-compile-bound-variables))
2294 (defun byte-compile-file-form-defvar (form)
2295 (let ((sym (nth 1 form)))
2296 (byte-compile--declare-var sym)
2297 (if (eq (car form) 'defconst)
2298 (push sym byte-compile-const-variables)))
2299 (if (and (null (cddr form)) ;No `value' provided.
2300 (eq (car form) 'defvar)) ;Just a declaration.
2302 (cond ((consp (nth 2 form))
2303 (setq form (copy-sequence form))
2304 (setcar (cdr (cdr form))
2305 (byte-compile-top-level (nth 2 form) nil 'file))))
2308 (put 'define-abbrev-table 'byte-hunk-handler
2309 'byte-compile-file-form-define-abbrev-table)
2310 (defun byte-compile-file-form-define-abbrev-table (form)
2311 (if (eq 'quote (car-safe (car-safe (cdr form))))
2312 (byte-compile--declare-var (car-safe (cdr (cadr form)))))
2313 (byte-compile-keep-pending form))
2315 (put 'custom-declare-variable 'byte-hunk-handler
2316 'byte-compile-file-form-custom-declare-variable)
2317 (defun byte-compile-file-form-custom-declare-variable (form)
2318 (when (byte-compile-warning-enabled-p 'callargs)
2319 (byte-compile-nogroup-warn form))
2320 (byte-compile--declare-var (nth 1 (nth 1 form)))
2321 (byte-compile-keep-pending form))
2323 (put 'require 'byte-hunk-handler 'byte-compile-file-form-require)
2324 (defun byte-compile-file-form-require (form)
2325 (let ((args (mapcar 'eval (cdr form)))
2326 (hist-orig load-history)
2328 (apply 'require args)
2329 (when (byte-compile-warning-enabled-p 'cl-functions)
2330 ;; Detect (require 'cl) in a way that works even if cl is already loaded.
2331 (if (member (car args) '("cl" cl))
2333 (byte-compile-warn "cl package required at runtime")
2334 (byte-compile-disable-warning 'cl-functions))
2335 ;; We may have required something that causes cl to be loaded, eg
2336 ;; the uncompiled version of a file that requires cl when compiling.
2337 (setq hist-new load-history)
2338 (while (and (not byte-compile-cl-functions)
2339 hist-new (not (eq hist-new hist-orig)))
2340 (and (byte-compile-cl-file-p (car (pop hist-new)))
2341 (byte-compile-find-cl-functions))))))
2342 (byte-compile-keep-pending form 'byte-compile-normal-call))
2344 (put 'progn 'byte-hunk-handler 'byte-compile-file-form-progn)
2345 (put 'prog1 'byte-hunk-handler 'byte-compile-file-form-progn)
2346 (put 'prog2 'byte-hunk-handler 'byte-compile-file-form-progn)
2347 (defun byte-compile-file-form-progn (form)
2348 (mapc 'byte-compile-file-form (cdr form))
2349 ;; Return nil so the forms are not output twice.
2352 (put 'with-no-warnings 'byte-hunk-handler
2353 'byte-compile-file-form-with-no-warnings)
2354 (defun byte-compile-file-form-with-no-warnings (form)
2355 ;; cf byte-compile-file-form-progn.
2356 (let (byte-compile-warnings)
2357 (mapc 'byte-compile-file-form (cdr form))
2360 ;; This handler is not necessary, but it makes the output from dont-compile
2361 ;; and similar macros cleaner.
2362 (put 'eval 'byte-hunk-handler 'byte-compile-file-form-eval)
2363 (defun byte-compile-file-form-eval (form)
2364 (if (eq (car-safe (nth 1 form)) 'quote)
2365 (nth 1 (nth 1 form))
2366 (byte-compile-keep-pending form)))
2368 (defun byte-compile-file-form-defmumble (name macro arglist body rest)
2369 "Process a `defalias' for NAME.
2370 If MACRO is non-nil, the definition is known to be a macro.
2371 ARGLIST is the list of arguments, if it was recognized or t otherwise.
2372 BODY of the definition, or t if not recognized.
2373 Return non-nil if everything went as planned, or nil to imply that it decided
2374 not to take responsibility for the actual compilation of the code."
2375 (let* ((this-kind (if macro 'byte-compile-macro-environment
2376 'byte-compile-function-environment))
2377 (that-kind (if macro 'byte-compile-function-environment
2378 'byte-compile-macro-environment))
2379 (this-one (assq name (symbol-value this-kind)))
2380 (that-one (assq name (symbol-value that-kind)))
2381 (byte-compile-current-form name)) ; For warnings.
2383 (byte-compile-set-symbol-position name)
2384 ;; When a function or macro is defined, add it to the call tree so that
2385 ;; we can tell when functions are not used.
2386 (if byte-compile-generate-call-tree
2387 (or (assq name byte-compile-call-tree)
2388 (setq byte-compile-call-tree
2389 (cons (list name nil nil) byte-compile-call-tree))))
2391 (if (byte-compile-warning-enabled-p 'redefine)
2392 (byte-compile-arglist-warn name arglist macro))
2394 (if byte-compile-verbose
2395 (message "Compiling %s... (%s)"
2396 (or byte-compile-current-file "") name))
2397 (cond ((not (or macro (listp body)))
2398 ;; We do not know positively if the definition is a macro
2399 ;; or a function, so we shouldn't emit warnings.
2400 ;; This also silences "multiple definition" warnings for defmethods.
2403 (if (and (byte-compile-warning-enabled-p 'redefine)
2404 ;; Don't warn when compiling the stubs in byte-run...
2405 (not (assq name byte-compile-initial-macro-environment)))
2407 "`%s' defined multiple times, as both function and macro"
2409 (setcdr that-one nil))
2411 (when (and (byte-compile-warning-enabled-p 'redefine)
2412 ;; Hack: Don't warn when compiling the magic internal
2413 ;; byte-compiler macros in byte-run.el...
2414 (not (assq name byte-compile-initial-macro-environment)))
2415 (byte-compile-warn "%s `%s' defined multiple times in this file"
2416 (if macro "macro" "function")
2418 ((eq (car-safe (symbol-function name))
2419 (if macro 'lambda 'macro))
2420 (when (byte-compile-warning-enabled-p 'redefine)
2421 (byte-compile-warn "%s `%s' being redefined as a %s"
2422 (if macro "function" "macro")
2424 (if macro "macro" "function")))
2425 ;; Shadow existing definition.
2427 (cons (cons name nil)
2428 (symbol-value this-kind))))
2431 (when (and (listp body)
2432 (stringp (car body))
2433 (symbolp (car-safe (cdr-safe body)))
2434 (car-safe (cdr-safe body))
2435 (stringp (car-safe (cdr-safe (cdr-safe body)))))
2436 ;; FIXME: We've done that already just above, so this looks wrong!
2437 ;;(byte-compile-set-symbol-position name)
2438 (byte-compile-warn "probable `\"' without `\\' in doc string of %s"
2441 (if (not (listp body))
2442 ;; The precise definition requires evaluation to find out, so it
2443 ;; will only be known at runtime.
2444 ;; For a macro, that means we can't use that macro in the same file.
2447 (push (cons name (if (listp arglist) `(declared ,arglist) t))
2448 byte-compile-function-environment))
2449 ;; Tell the caller that we didn't compile it yet.
2452 (let* ((code (byte-compile-lambda (cons arglist body) t)))
2454 ;; A definition in b-c-initial-m-e should always take precedence
2455 ;; during compilation, so don't let it be redefined. (Bug#8647)
2457 (assq name byte-compile-initial-macro-environment))
2458 (setcdr this-one code))
2460 (cons (cons name code)
2461 (symbol-value this-kind))))
2464 ;; There are additional args to `defalias' (like maybe a docstring)
2465 ;; that the code below can't handle: punt!
2467 ;; Otherwise, we have a bona-fide defun/defmacro definition, and use
2468 ;; special code to allow dynamic docstrings and byte-code.
2469 (byte-compile-flush-pending)
2471 ;; If there's no doc string, provide -1 as the "doc string
2472 ;; index" so that no element will be treated as a doc string.
2473 (if (not (stringp (car body))) -1 4)))
2474 ;; Output the form by hand, that's much simpler than having
2475 ;; b-c-output-file-form analyze the defalias.
2476 (byte-compile-output-docform
2479 (if macro `(" '(macro . #[" ,index "])") `(" #[" ,index "]"))
2480 (append code nil) ; Turn byte-code-function-p into list.
2481 (and (atom code) byte-compile-dynamic
2484 (princ ")" byte-compile--outbuffer)
2487 (defun byte-compile-output-as-comment (exp quoted)
2488 "Print Lisp object EXP in the output file, inside a comment,
2489 and return the file (byte) position it will have.
2490 If QUOTED is non-nil, print with quoting; otherwise, print without quoting."
2491 (with-current-buffer byte-compile--outbuffer
2492 (let ((position (point)))
2494 ;; Insert EXP, and make it a comment with #@LENGTH.
2497 (prin1 exp byte-compile--outbuffer)
2498 (princ exp byte-compile--outbuffer))
2499 (goto-char position)
2500 ;; Quote certain special characters as needed.
2501 ;; get_doc_string in doc.c does the unquoting.
2502 (while (search-forward "\^A" nil t)
2503 (replace-match "\^A\^A" t t))
2504 (goto-char position)
2505 (while (search-forward "\000" nil t)
2506 (replace-match "\^A0" t t))
2507 (goto-char position)
2508 (while (search-forward "\037" nil t)
2509 (replace-match "\^A_" t t))
2510 (goto-char (point-max))
2512 (goto-char position)
2513 (insert "#@" (format "%d" (- (position-bytes (point-max))
2514 (position-bytes position))))
2516 ;; Save the file position of the object.
2517 ;; Note we add 1 to skip the space that we inserted before the actual doc
2518 ;; string, and subtract point-min to convert from an 1-origin Emacs
2519 ;; position to a file position.
2521 (- (position-bytes (point)) (point-min) -1)
2522 (goto-char (point-max))))))
2524 (defun byte-compile--reify-function (fun)
2525 "Return an expression which will evaluate to a function value FUN.
2526 FUN should be either a `lambda' value or a `closure' value."
2527 (pcase-let* (((or (and `(lambda ,args . ,body) (let env nil))
2528 `(closure ,env ,args . ,body))
2531 ;; Turn the function's closed vars (if any) into local let bindings.
2532 (dolist (binding env)
2535 ;; We check shadowing by the args, so that the `let' can be moved
2536 ;; within the lambda, which can then be unfolded. FIXME: Some of those
2537 ;; bindings might be unused in `body'.
2538 (unless (memq (car binding) args) ;Shadowed.
2539 (push `(,(car binding) ',(cdr binding)) renv)))
2541 (t (push `(defvar ,binding) body))))
2543 `(lambda ,args ,@body)
2544 `(lambda ,args (let ,(nreverse renv) ,@body)))))
2547 (defun byte-compile (form)
2548 "If FORM is a symbol, byte-compile its function definition.
2549 If FORM is a lambda or a macro, byte-compile it as a function."
2550 (displaying-byte-compile-warnings
2551 (byte-compile-close-variables
2552 (let* ((lexical-binding lexical-binding)
2553 (fun (if (symbolp form)
2554 (symbol-function form)
2556 (macro (eq (car-safe fun) 'macro)))
2558 (setq fun (cdr fun)))
2560 ;; Up until Emacs-24.1, byte-compile silently did nothing when asked to
2561 ;; compile something invalid. So let's tune down the complaint from an
2562 ;; error to a simple message for the known case where signaling an error
2564 ((byte-code-function-p fun)
2565 (message "Function %s is already compiled"
2566 (if (symbolp form) form "provided"))
2569 (when (symbolp form)
2570 (unless (memq (car-safe fun) '(closure lambda))
2571 (error "Don't know how to compile %S" fun))
2572 (setq lexical-binding (eq (car fun) 'closure))
2573 (setq fun (byte-compile--reify-function fun)))
2574 (unless (eq (car-safe fun) 'lambda)
2575 (error "Don't know how to compile %S" fun))
2577 (setq fun (byte-compile-preprocess fun))
2578 ;; Get rid of the `function' quote added by the `lambda' macro.
2579 (if (eq (car-safe fun) 'function) (setq fun (cadr fun)))
2580 (setq fun (byte-compile-lambda fun))
2581 (if macro (push 'macro fun))
2586 (defun byte-compile-sexp (sexp)
2587 "Compile and return SEXP."
2588 (displaying-byte-compile-warnings
2589 (byte-compile-close-variables
2590 (byte-compile-top-level (byte-compile-preprocess sexp)))))
2592 (defun byte-compile-check-lambda-list (list)
2593 "Check lambda-list LIST for errors."
2596 (let ((arg (car list)))
2598 (byte-compile-set-symbol-position arg))
2599 (cond ((or (not (symbolp arg))
2600 (macroexp--const-symbol-p arg t))
2601 (error "Invalid lambda variable %s" arg))
2604 (error "&rest without variable name"))
2606 (error "Garbage following &rest VAR in lambda-list")))
2607 ((eq arg '&optional)
2609 (error "Variable name missing after &optional")))
2611 (byte-compile-warn "repeated variable %s in lambda-list" arg))
2614 (setq list (cdr list)))))
2617 (defun byte-compile-arglist-vars (arglist)
2618 "Return a list of the variables in the lambda argument list ARGLIST."
2619 (remq '&rest (remq '&optional arglist)))
2621 (defun byte-compile-make-lambda-lexenv (args)
2622 "Return a new lexical environment for a lambda expression FORM."
2625 ;; Add entries for each argument.
2627 (push (cons arg stackpos) lexenv)
2628 (setq stackpos (1+ stackpos)))
2629 ;; Return the new lexical environment.
2632 (defun byte-compile-make-args-desc (arglist)
2635 (while (and arglist (not (memq (car arglist) '(&optional &rest))))
2636 (setq mandatory (1+ mandatory))
2637 (setq arglist (cdr arglist)))
2638 (setq nonrest mandatory)
2639 (when (eq (car arglist) '&optional)
2640 (setq arglist (cdr arglist))
2641 (while (and arglist (not (eq (car arglist) '&rest)))
2642 (setq nonrest (1+ nonrest))
2643 (setq arglist (cdr arglist))))
2646 (if (> mandatory 127)
2647 (byte-compile-report-error "Too many (>127) mandatory arguments")
2653 (defun byte-compile-lambda (fun &optional add-lambda reserved-csts)
2654 "Byte-compile a lambda-expression and return a valid function.
2655 The value is usually a compiled function but may be the original
2657 When ADD-LAMBDA is non-nil, the symbol `lambda' is added as head
2658 of the list FUN and `byte-compile-set-symbol-position' is not called.
2659 Use this feature to avoid calling `byte-compile-set-symbol-position'
2660 for symbols generated by the byte compiler itself."
2662 (setq fun (cons 'lambda fun))
2663 (unless (eq 'lambda (car-safe fun))
2664 (error "Not a lambda list: %S" fun))
2665 (byte-compile-set-symbol-position 'lambda))
2666 (byte-compile-check-lambda-list (nth 1 fun))
2667 (let* ((arglist (nth 1 fun))
2668 (arglistvars (byte-compile-arglist-vars arglist))
2669 (byte-compile-bound-variables
2670 (append (if (not lexical-binding) arglistvars)
2671 byte-compile-bound-variables))
2672 (body (cdr (cdr fun)))
2673 (doc (if (stringp (car body))
2675 ;; Discard the doc string
2676 ;; unless it is the last element of the body.
2678 (setq body (cdr body))))))
2679 (int (assq 'interactive body)))
2680 ;; Process the interactive spec.
2682 (byte-compile-set-symbol-position 'interactive)
2683 ;; Skip (interactive) if it is in front (the most usual location).
2684 (if (eq int (car body))
2685 (setq body (cdr body)))
2686 (cond ((consp (cdr int))
2688 (byte-compile-warn "malformed interactive spec: %s"
2689 (prin1-to-string int)))
2690 ;; If the interactive spec is a call to `list', don't
2691 ;; compile it, because `call-interactively' looks at the
2692 ;; args of `list'. Actually, compile it to get warnings,
2693 ;; but don't use the result.
2694 (let* ((form (nth 1 int))
2695 (newform (byte-compile-top-level form)))
2696 (while (memq (car-safe form) '(let let* progn save-excursion))
2697 (while (consp (cdr form))
2698 (setq form (cdr form)))
2699 (setq form (car form)))
2700 (if (and (eq (car-safe form) 'list)
2701 ;; The spec is evalled in callint.c in dynamic-scoping
2702 ;; mode, so just leaving the form unchanged would mean
2703 ;; it won't be eval'd in the right mode.
2704 (not lexical-binding))
2706 (setq int `(interactive ,newform)))))
2708 (byte-compile-warn "malformed interactive spec: %s"
2709 (prin1-to-string int)))))
2710 ;; Process the body.
2712 (byte-compile-top-level (cons 'progn body) nil 'lambda
2713 ;; If doing lexical binding, push a new
2714 ;; lexical environment containing just the
2715 ;; args (since lambda expressions should be
2717 (and lexical-binding
2718 (byte-compile-make-lambda-lexenv
2721 ;; Build the actual byte-coded function.
2722 (cl-assert (eq 'byte-code (car-safe compiled)))
2723 (apply #'make-byte-code
2725 (byte-compile-make-args-desc arglist)
2728 ;; byte-string, constants-vector, stack depth
2730 ;; optionally, the doc string.
2731 (cond ((and lexical-binding arglist)
2732 ;; byte-compile-make-args-desc lost the args's names,
2733 ;; so preserve them in the docstring.
2734 (list (help-add-fundoc-usage doc arglist)))
2737 ;; optionally, the interactive spec.
2739 (list (nth 1 int))))))))
2741 (defvar byte-compile-reserved-constants 0)
2743 (defun byte-compile-constants-vector ()
2744 ;; Builds the constants-vector from the current variables and constants.
2745 ;; This modifies the constants from (const . nil) to (const . offset).
2746 ;; To keep the byte-codes to look up the vector as short as possible:
2747 ;; First 6 elements are vars, as there are one-byte varref codes for those.
2748 ;; Next up to byte-constant-limit are constants, still with one-byte codes.
2749 ;; Next variables again, to get 2-byte codes for variable lookup.
2750 ;; The rest of the constants and variables need 3-byte byte-codes.
2751 (let* ((i (1- byte-compile-reserved-constants))
2752 (rest (nreverse byte-compile-variables)) ; nreverse because the first
2753 (other (nreverse byte-compile-constants)) ; vars often are used most.
2755 (limits '(5 ; Use the 1-byte varref codes,
2756 63 ; 1-constlim ; 1-byte byte-constant codes,
2757 255 ; 2-byte varref codes,
2758 65535 ; 3-byte codes for the rest.
2759 65535)) ; twice since we step when we swap.
2761 (while (or rest other)
2762 (setq limit (car limits))
2763 (while (and rest (< i limit))
2765 ((numberp (car rest))
2766 (cl-assert (< (car rest) byte-compile-reserved-constants)))
2767 ((setq tmp (assq (car (car rest)) ret))
2768 (setcdr (car rest) (cdr tmp)))
2770 (setcdr (car rest) (setq i (1+ i)))
2771 (setq ret (cons (car rest) ret))))
2772 (setq rest (cdr rest)))
2773 (setq limits (cdr limits) ;Step
2774 rest (prog1 other ;&Swap.
2775 (setq other rest))))
2776 (apply 'vector (nreverse (mapcar 'car ret)))))
2778 ;; Given an expression FORM, compile it and return an equivalent byte-code
2779 ;; expression (a call to the function byte-code).
2780 (defun byte-compile-top-level (form &optional for-effect output-type
2781 lexenv reserved-csts)
2782 ;; OUTPUT-TYPE advises about how form is expected to be used:
2783 ;; 'eval or nil -> a single form,
2784 ;; 'progn or t -> a list of forms,
2785 ;; 'lambda -> body of a lambda,
2786 ;; 'file -> used at file-level.
2787 (let ((byte-compile--for-effect for-effect)
2788 (byte-compile-constants nil)
2789 (byte-compile-variables nil)
2790 (byte-compile-tag-number 0)
2791 (byte-compile-depth 0)
2792 (byte-compile-maxdepth 0)
2793 (byte-compile--lexical-environment lexenv)
2794 (byte-compile-reserved-constants (or reserved-csts 0))
2795 (byte-compile-output nil))
2796 (if (memq byte-optimize '(t source))
2797 (setq form (byte-optimize-form form byte-compile--for-effect)))
2798 (while (and (eq (car-safe form) 'progn) (null (cdr (cdr form))))
2799 (setq form (nth 1 form)))
2800 ;; Set up things for a lexically-bound function.
2801 (when (and lexical-binding (eq output-type 'lambda))
2802 ;; See how many arguments there are, and set the current stack depth
2804 (setq byte-compile-depth (length byte-compile--lexical-environment))
2805 ;; If there are args, output a tag to record the initial
2806 ;; stack-depth for the optimizer.
2807 (when (> byte-compile-depth 0)
2808 (byte-compile-out-tag (byte-compile-make-tag))))
2810 (byte-compile-form form byte-compile--for-effect)
2811 (byte-compile-out-toplevel byte-compile--for-effect output-type)))
2813 (defun byte-compile-out-toplevel (&optional for-effect output-type)
2815 ;; The stack is empty. Push a value to be returned from (byte-code ..).
2816 (if (eq (car (car byte-compile-output)) 'byte-discard)
2817 (setq byte-compile-output (cdr byte-compile-output))
2818 (byte-compile-push-constant
2819 ;; Push any constant - preferably one which already is used, and
2820 ;; a number or symbol - ie not some big sequence. The return value
2821 ;; isn't returned, but it would be a shame if some textually large
2822 ;; constant was not optimized away because we chose to return it.
2823 (and (not (assq nil byte-compile-constants)) ; Nil is often there.
2824 (let ((tmp (reverse byte-compile-constants)))
2825 (while (and tmp (not (or (symbolp (caar tmp))
2826 (numberp (caar tmp)))))
2827 (setq tmp (cdr tmp)))
2829 (byte-compile-out 'byte-return 0)
2830 (setq byte-compile-output (nreverse byte-compile-output))
2831 (if (memq byte-optimize '(t byte))
2832 (setq byte-compile-output
2833 (byte-optimize-lapcode byte-compile-output)))
2835 ;; Decompile trivial functions:
2836 ;; only constants and variables, or a single funcall except in lambdas.
2837 ;; Except for Lisp_Compiled objects, forms like (foo "hi")
2838 ;; are still quicker than (byte-code "..." [foo "hi"] 2).
2839 ;; Note that even (quote foo) must be parsed just as any subr by the
2840 ;; interpreter, so quote should be compiled into byte-code in some contexts.
2841 ;; What to leave uncompiled:
2842 ;; lambda -> never. we used to leave it uncompiled if the body was
2843 ;; a single atom, but that causes confusion if the docstring
2844 ;; uses the (file . pos) syntax. Besides, now that we have
2845 ;; the Lisp_Compiled type, the compiled form is faster.
2846 ;; eval -> atom, quote or (function atom atom atom)
2847 ;; progn -> as <<same-as-eval>> or (progn <<same-as-eval>> atom)
2848 ;; file -> as progn, but takes both quotes and atoms, and longer forms.
2850 (maycall (not (eq output-type 'lambda))) ; t if we may make a funcall.
2853 ;; #### This should be split out into byte-compile-nontrivial-function-p.
2854 ((or (eq output-type 'lambda)
2855 (nthcdr (if (eq output-type 'file) 50 8) byte-compile-output)
2856 (assq 'TAG byte-compile-output) ; Not necessary, but speeds up a bit.
2857 (not (setq tmp (assq 'byte-return byte-compile-output)))
2859 (setq rest (nreverse
2860 (cdr (memq tmp (reverse byte-compile-output)))))
2863 ((memq (car (car rest)) '(byte-varref byte-constant))
2864 (setq tmp (car (cdr (car rest))))
2865 (if (if (eq (car (car rest)) 'byte-constant)
2868 (not (macroexp--const-symbol-p tmp)))))
2870 (setq body (cons (list 'quote tmp) body)))
2871 (setq body (cons tmp body))))
2873 ;; Allow a funcall if at most one atom follows it.
2874 (null (nthcdr 3 rest))
2875 (setq tmp (get (car (car rest)) 'byte-opcode-invert))
2876 (or (null (cdr rest))
2877 (and (memq output-type '(file progn t))
2879 (eq (car (nth 1 rest)) 'byte-discard)
2880 (progn (setq rest (cdr rest)) t))))
2881 (setq maycall nil) ; Only allow one real function call.
2882 (setq body (nreverse body))
2884 (if (and (eq tmp 'funcall)
2885 (eq (car-safe (car body)) 'quote)
2886 (symbolp (nth 1 (car body))))
2887 (cons (nth 1 (car body)) (cdr body))
2889 (or (eq output-type 'file)
2890 (not (delq nil (mapcar 'consp (cdr (car body))))))))
2891 (setq rest (cdr rest)))
2893 (let ((byte-compile-vector (byte-compile-constants-vector)))
2894 (list 'byte-code (byte-compile-lapcode byte-compile-output)
2895 byte-compile-vector byte-compile-maxdepth)))
2896 ;; it's a trivial function
2897 ((cdr body) (cons 'progn (nreverse body)))
2900 ;; Given BODY, compile it and return a new body.
2901 (defun byte-compile-top-level-body (body &optional for-effect)
2903 (byte-compile-top-level (cons 'progn body) for-effect t))
2904 (cond ((eq (car-safe body) 'progn)
2909 ;; Special macro-expander used during byte-compilation.
2910 (defun byte-compile-macroexpand-declare-function (fn file &rest args)
2912 (if (and (consp args) (listp (car args)))
2913 (list 'declared (car args))
2914 t)) ; Arglist not specified.
2915 byte-compile-function-environment)
2916 ;; We are stating that it _will_ be defined at runtime.
2917 (setq byte-compile-noruntime-functions
2918 (delq fn byte-compile-noruntime-functions))
2919 ;; Delegate the rest to the normal macro definition.
2920 (macroexpand `(declare-function ,fn ,file ,@args)))
2923 ;; This is the recursive entry point for compiling each subform of an
2925 ;; If for-effect is non-nil, byte-compile-form will output a byte-discard
2926 ;; before terminating (ie no value will be left on the stack).
2927 ;; A byte-compile handler may, when byte-compile--for-effect is non-nil, choose
2928 ;; output code which does not leave a value on the stack, and then set
2929 ;; byte-compile--for-effect to nil (to prevent byte-compile-form from
2930 ;; outputting the byte-discard).
2931 ;; If a handler wants to call another handler, it should do so via
2932 ;; byte-compile-form, or take extreme care to handle byte-compile--for-effect
2933 ;; correctly. (Use byte-compile-form-do-effect to reset the
2934 ;; byte-compile--for-effect flag too.)
2936 (defun byte-compile-form (form &optional for-effect)
2937 (let ((byte-compile--for-effect for-effect))
2940 (cond ((or (not (symbolp form)) (macroexp--const-symbol-p form))
2941 (when (symbolp form)
2942 (byte-compile-set-symbol-position form))
2943 (byte-compile-constant form))
2944 ((and byte-compile--for-effect byte-compile-delete-errors)
2945 (when (symbolp form)
2946 (byte-compile-set-symbol-position form))
2947 (setq byte-compile--for-effect nil))
2949 (byte-compile-variable-ref form))))
2950 ((symbolp (car form))
2951 (let* ((fn (car form))
2952 (handler (get fn 'byte-compile))
2954 (or (get fn 'interactive-only)
2955 (memq fn byte-compile-interactive-only-functions))))
2956 (when (macroexp--const-symbol-p fn)
2957 (byte-compile-warn "`%s' called as a function" fn))
2958 (when (and (byte-compile-warning-enabled-p 'interactive-only)
2960 (byte-compile-warn "`%s' is for interactive use only%s"
2962 (cond ((stringp interactive-only)
2963 (format "; %s" interactive-only))
2964 ((and (symbolp 'interactive-only)
2965 (not (eq interactive-only t)))
2966 (format "; use `%s' instead."
2969 (if (eq (car-safe (symbol-function (car form))) 'macro)
2970 (byte-compile-log-warning
2971 (format "Forgot to expand macro %s in %S" (car form) form)
2974 ;; Make sure that function exists.
2975 (and (functionp handler)
2976 ;; Ignore obsolete byte-compile function used by former
2977 ;; CL code to handle compiler macros (we do it
2978 ;; differently now).
2979 (not (eq handler 'cl-byte-compile-compiler-macro))))
2980 (funcall handler form)
2981 (byte-compile-normal-call form))
2982 (if (byte-compile-warning-enabled-p 'cl-functions)
2983 (byte-compile-cl-warn form))))
2984 ((and (byte-code-function-p (car form))
2985 (memq byte-optimize '(t lap)))
2986 (byte-compile-unfold-bcf form))
2987 ((and (eq (car-safe (car form)) 'lambda)
2988 ;; if the form comes out the same way it went in, that's
2989 ;; because it was malformed, and we couldn't unfold it.
2990 (not (eq form (setq form (byte-compile-unfold-lambda form)))))
2991 (byte-compile-form form byte-compile--for-effect)
2992 (setq byte-compile--for-effect nil))
2993 ((byte-compile-normal-call form)))
2994 (if byte-compile--for-effect
2995 (byte-compile-discard))))
2997 (defun byte-compile-normal-call (form)
2998 (when (and (byte-compile-warning-enabled-p 'callargs)
2999 (symbolp (car form)))
3000 (if (memq (car form)
3001 '(custom-declare-group custom-declare-variable
3002 custom-declare-face))
3003 (byte-compile-nogroup-warn form))
3004 (byte-compile-callargs-warn form))
3005 (if byte-compile-generate-call-tree
3006 (byte-compile-annotate-call-tree form))
3007 (when (and byte-compile--for-effect (eq (car form) 'mapcar)
3008 (byte-compile-warning-enabled-p 'mapcar))
3009 (byte-compile-set-symbol-position 'mapcar)
3011 "`mapcar' called for effect; use `mapc' or `dolist' instead"))
3012 (byte-compile-push-constant (car form))
3013 (mapc 'byte-compile-form (cdr form)) ; wasteful, but faster.
3014 (byte-compile-out 'byte-call (length (cdr form))))
3017 ;; Splice the given lap code into the current instruction stream.
3018 ;; If it has any labels in it, you're responsible for making sure there
3019 ;; are no collisions, and that byte-compile-tag-number is reasonable
3020 ;; after this is spliced in. The provided list is destroyed.
3021 (defun byte-compile-inline-lapcode (lap end-depth)
3022 ;; "Replay" the operations: we used to just do
3023 ;; (setq byte-compile-output (nconc (nreverse lap) byte-compile-output))
3024 ;; but that fails to update byte-compile-depth, so we had to assume
3025 ;; that `lap' ends up adding exactly 1 element to the stack. This
3026 ;; happens to be true for byte-code generated by bytecomp.el without
3027 ;; lexical-binding, but it's not true in general, and it's not true for
3028 ;; code output by bytecomp.el with lexical-binding.
3029 (let ((endtag (byte-compile-make-tag)))
3032 ((eq (car op) 'TAG) (byte-compile-out-tag op))
3033 ((memq (car op) byte-goto-ops) (byte-compile-goto (car op) (cdr op)))
3034 ((eq (car op) 'byte-return)
3035 (byte-compile-discard (- byte-compile-depth end-depth) t)
3036 (byte-compile-goto 'byte-goto endtag))
3037 (t (byte-compile-out (car op) (cdr op)))))
3038 (byte-compile-out-tag endtag)))
3040 (defun byte-compile-unfold-bcf (form)
3041 "Inline call to byte-code-functions."
3042 (let* ((byte-compile-bound-variables byte-compile-bound-variables)
3044 (fargs (aref fun 0))
3045 (start-depth byte-compile-depth)
3046 (fmax2 (if (numberp fargs) (lsh fargs -7))) ;2*max+rest.
3047 ;; (fmin (if (numberp fargs) (logand fargs 127)))
3048 (alen (length (cdr form)))
3050 (fetch-bytecode fun)
3051 (mapc 'byte-compile-form (cdr form))
3053 ;; Old-style byte-code.
3054 (cl-assert (listp fargs))
3057 (`&optional (setq fargs (cdr fargs)))
3058 (`&rest (setq fmax2 (+ (* 2 (length dynbinds)) 1))
3059 (push (cadr fargs) dynbinds)
3061 (_ (push (pop fargs) dynbinds))))
3062 (unless fmax2 (setq fmax2 (* 2 (length dynbinds)))))
3064 ((<= (+ alen alen) fmax2)
3065 ;; Add missing &optional (or &rest) arguments.
3066 (dotimes (_ (- (/ (1+ fmax2) 2) alen))
3067 (byte-compile-push-constant nil)))
3068 ((zerop (logand fmax2 1))
3069 (byte-compile-log-warning "Too many arguments for inlined function"
3071 (byte-compile-discard (- alen (/ fmax2 2))))
3073 ;; Turn &rest args into a list.
3074 (let ((n (- alen (/ (1- fmax2) 2))))
3075 (cl-assert (> n 0) nil "problem: fmax2=%S alen=%S n=%S" fmax2 alen n)
3078 (aref [byte-list1 byte-list2 byte-list3 byte-list4] (1- n))
3080 (byte-compile-out 'byte-listN n)))))
3081 (mapc #'byte-compile-dynamic-variable-bind dynbinds)
3082 (byte-compile-inline-lapcode
3083 (byte-decompile-bytecode-1 (aref fun 1) (aref fun 2) t)
3085 ;; Unbind dynamic variables.
3087 (byte-compile-out 'byte-unbind (length dynbinds)))
3088 (cl-assert (eq byte-compile-depth (1+ start-depth))
3089 nil "Wrong depth start=%s end=%s" start-depth byte-compile-depth)))
3091 (defun byte-compile-check-variable (var access-type)
3092 "Do various error checks before a use of the variable VAR."
3094 (byte-compile-set-symbol-position var))
3095 (cond ((or (not (symbolp var)) (macroexp--const-symbol-p var))
3096 (when (byte-compile-warning-enabled-p 'constants)
3097 (byte-compile-warn (if (eq access-type 'let-bind)
3098 "attempt to let-bind %s `%s`"
3099 "variable reference to %s `%s'")
3100 (if (symbolp var) "constant" "nonvariable")
3101 (prin1-to-string var))))
3102 ((let ((od (get var 'byte-obsolete-variable)))
3104 (not (memq var byte-compile-not-obsolete-vars))
3105 (not (memq var byte-compile-global-not-obsolete-vars))
3106 (or (pcase (nth 1 od)
3107 (`set (not (eq access-type 'reference)))
3108 (`get (eq access-type 'reference))
3110 (byte-compile-warn-obsolete var))))
3112 (defsubst byte-compile-dynamic-variable-op (base-op var)
3113 (let ((tmp (assq var byte-compile-variables)))
3115 (setq tmp (list var))
3116 (push tmp byte-compile-variables))
3117 (byte-compile-out base-op tmp)))
3119 (defun byte-compile-dynamic-variable-bind (var)
3120 "Generate code to bind the lexical variable VAR to the top-of-stack value."
3121 (byte-compile-check-variable var 'let-bind)
3122 (push var byte-compile-bound-variables)
3123 (byte-compile-dynamic-variable-op 'byte-varbind var))
3125 (defun byte-compile-variable-ref (var)
3126 "Generate code to push the value of the variable VAR on the stack."
3127 (byte-compile-check-variable var 'reference)
3128 (let ((lex-binding (assq var byte-compile--lexical-environment)))
3130 ;; VAR is lexically bound
3131 (byte-compile-stack-ref (cdr lex-binding))
3132 ;; VAR is dynamically bound
3133 (unless (or (not (byte-compile-warning-enabled-p 'free-vars))
3135 (memq var byte-compile-bound-variables)
3136 (memq var byte-compile-free-references))
3137 (byte-compile-warn "reference to free variable `%S'" var)
3138 (push var byte-compile-free-references))
3139 (byte-compile-dynamic-variable-op 'byte-varref var))))
3141 (defun byte-compile-variable-set (var)
3142 "Generate code to set the variable VAR from the top-of-stack value."
3143 (byte-compile-check-variable var 'assign)
3144 (let ((lex-binding (assq var byte-compile--lexical-environment)))
3146 ;; VAR is lexically bound.
3147 (byte-compile-stack-set (cdr lex-binding))
3148 ;; VAR is dynamically bound.
3149 (unless (or (not (byte-compile-warning-enabled-p 'free-vars))
3151 (memq var byte-compile-bound-variables)
3152 (memq var byte-compile-free-assignments))
3153 (byte-compile-warn "assignment to free variable `%s'" var)
3154 (push var byte-compile-free-assignments))
3155 (byte-compile-dynamic-variable-op 'byte-varset var))))
3157 (defmacro byte-compile-get-constant (const)
3158 `(or (if (stringp ,const)
3159 ;; In a string constant, treat properties as significant.
3161 (dolist (elt byte-compile-constants)
3162 (if (equal-including-properties (car elt) ,const)
3165 (assq ,const byte-compile-constants))
3166 (car (setq byte-compile-constants
3167 (cons (list ,const) byte-compile-constants)))))
3169 ;; Use this when the value of a form is a constant.
3170 ;; This obeys byte-compile--for-effect.
3171 (defun byte-compile-constant (const)
3172 (if byte-compile--for-effect
3173 (setq byte-compile--for-effect nil)
3174 (when (symbolp const)
3175 (byte-compile-set-symbol-position const))
3176 (byte-compile-out 'byte-constant (byte-compile-get-constant const))))
3178 ;; Use this for a constant that is not the value of its containing form.
3179 ;; This ignores byte-compile--for-effect.
3180 (defun byte-compile-push-constant (const)
3181 (let ((byte-compile--for-effect nil))
3182 (inline (byte-compile-constant const))))
3184 ;; Compile those primitive ordinary functions
3185 ;; which have special byte codes just for speed.
3187 (defmacro byte-defop-compiler (function &optional compile-handler)
3188 "Add a compiler-form for FUNCTION.
3189 If function is a symbol, then the variable \"byte-SYMBOL\" must name
3190 the opcode to be used. If function is a list, the first element
3191 is the function and the second element is the bytecode-symbol.
3192 The second element may be nil, meaning there is no opcode.
3193 COMPILE-HANDLER is the function to use to compile this byte-op, or
3194 may be the abbreviations 0, 1, 2, 3, 0-1, or 1-2.
3195 If it is nil, then the handler is \"byte-compile-SYMBOL.\""
3197 (if (symbolp function)
3198 (setq opcode (intern (concat "byte-" (symbol-name function))))
3199 (setq opcode (car (cdr function))
3200 function (car function)))
3202 (list 'put (list 'quote function) ''byte-compile
3204 (or (cdr (assq compile-handler
3205 '((0 . byte-compile-no-args)
3206 (1 . byte-compile-one-arg)
3207 (2 . byte-compile-two-args)
3208 (2-and . byte-compile-and-folded)
3209 (3 . byte-compile-three-args)
3210 (0-1 . byte-compile-zero-or-one-arg)
3211 (1-2 . byte-compile-one-or-two-args)
3212 (2-3 . byte-compile-two-or-three-args)
3215 (intern (concat "byte-compile-"
3216 (symbol-name function))))))))
3219 (list 'put (list 'quote function)
3220 ''byte-opcode (list 'quote opcode))
3221 (list 'put (list 'quote opcode)
3222 ''byte-opcode-invert (list 'quote function)))
3225 (defmacro byte-defop-compiler-1 (function &optional compile-handler)
3226 (list 'byte-defop-compiler (list function nil) compile-handler))
3229 (put 'byte-call 'byte-opcode-invert 'funcall)
3230 (put 'byte-list1 'byte-opcode-invert 'list)
3231 (put 'byte-list2 'byte-opcode-invert 'list)
3232 (put 'byte-list3 'byte-opcode-invert 'list)
3233 (put 'byte-list4 'byte-opcode-invert 'list)
3234 (put 'byte-listN 'byte-opcode-invert 'list)
3235 (put 'byte-concat2 'byte-opcode-invert 'concat)
3236 (put 'byte-concat3 'byte-opcode-invert 'concat)
3237 (put 'byte-concat4 'byte-opcode-invert 'concat)
3238 (put 'byte-concatN 'byte-opcode-invert 'concat)
3239 (put 'byte-insertN 'byte-opcode-invert 'insert)
3241 (byte-defop-compiler point 0)
3242 ;;(byte-defop-compiler mark 0) ;; obsolete
3243 (byte-defop-compiler point-max 0)
3244 (byte-defop-compiler point-min 0)
3245 (byte-defop-compiler following-char 0)
3246 (byte-defop-compiler preceding-char 0)
3247 (byte-defop-compiler current-column 0)
3248 (byte-defop-compiler eolp 0)
3249 (byte-defop-compiler eobp 0)
3250 (byte-defop-compiler bolp 0)
3251 (byte-defop-compiler bobp 0)
3252 (byte-defop-compiler current-buffer 0)
3253 ;;(byte-defop-compiler read-char 0) ;; obsolete
3254 ;; (byte-defop-compiler interactive-p 0) ;; Obsolete.
3255 (byte-defop-compiler widen 0)
3256 (byte-defop-compiler end-of-line 0-1)
3257 (byte-defop-compiler forward-char 0-1)
3258 (byte-defop-compiler forward-line 0-1)
3259 (byte-defop-compiler symbolp 1)
3260 (byte-defop-compiler consp 1)
3261 (byte-defop-compiler stringp 1)
3262 (byte-defop-compiler listp 1)
3263 (byte-defop-compiler not 1)
3264 (byte-defop-compiler (null byte-not) 1)
3265 (byte-defop-compiler car 1)
3266 (byte-defop-compiler cdr 1)
3267 (byte-defop-compiler length 1)
3268 (byte-defop-compiler symbol-value 1)
3269 (byte-defop-compiler symbol-function 1)
3270 (byte-defop-compiler (1+ byte-add1) 1)
3271 (byte-defop-compiler (1- byte-sub1) 1)
3272 (byte-defop-compiler goto-char 1)
3273 (byte-defop-compiler char-after 0-1)
3274 (byte-defop-compiler set-buffer 1)
3275 ;;(byte-defop-compiler set-mark 1) ;; obsolete
3276 (byte-defop-compiler forward-word 0-1)
3277 (byte-defop-compiler char-syntax 1)
3278 (byte-defop-compiler nreverse 1)
3279 (byte-defop-compiler car-safe 1)
3280 (byte-defop-compiler cdr-safe 1)
3281 (byte-defop-compiler numberp 1)
3282 (byte-defop-compiler integerp 1)
3283 (byte-defop-compiler skip-chars-forward 1-2)
3284 (byte-defop-compiler skip-chars-backward 1-2)
3285 (byte-defop-compiler eq 2)
3286 (byte-defop-compiler memq 2)
3287 (byte-defop-compiler cons 2)
3288 (byte-defop-compiler aref 2)
3289 (byte-defop-compiler set 2)
3290 (byte-defop-compiler (= byte-eqlsign) 2-and)
3291 (byte-defop-compiler (< byte-lss) 2-and)
3292 (byte-defop-compiler (> byte-gtr) 2-and)
3293 (byte-defop-compiler (<= byte-leq) 2-and)
3294 (byte-defop-compiler (>= byte-geq) 2-and)
3295 (byte-defop-compiler get 2)
3296 (byte-defop-compiler nth 2)
3297 (byte-defop-compiler substring 2-3)
3298 (byte-defop-compiler (move-marker byte-set-marker) 2-3)
3299 (byte-defop-compiler set-marker 2-3)
3300 (byte-defop-compiler match-beginning 1)
3301 (byte-defop-compiler match-end 1)
3302 (byte-defop-compiler upcase 1)
3303 (byte-defop-compiler downcase 1)
3304 (byte-defop-compiler string= 2)
3305 (byte-defop-compiler string< 2)
3306 (byte-defop-compiler (string-equal byte-string=) 2)
3307 (byte-defop-compiler (string-lessp byte-string<) 2)
3308 (byte-defop-compiler equal 2)
3309 (byte-defop-compiler nthcdr 2)
3310 (byte-defop-compiler elt 2)
3311 (byte-defop-compiler member 2)
3312 (byte-defop-compiler assq 2)
3313 (byte-defop-compiler (rplaca byte-setcar) 2)
3314 (byte-defop-compiler (rplacd byte-setcdr) 2)
3315 (byte-defop-compiler setcar 2)
3316 (byte-defop-compiler setcdr 2)
3317 (byte-defop-compiler buffer-substring 2)
3318 (byte-defop-compiler delete-region 2)
3319 (byte-defop-compiler narrow-to-region 2)
3320 (byte-defop-compiler (% byte-rem) 2)
3321 (byte-defop-compiler aset 3)
3323 (byte-defop-compiler max byte-compile-associative)
3324 (byte-defop-compiler min byte-compile-associative)
3325 (byte-defop-compiler (+ byte-plus) byte-compile-associative)
3326 (byte-defop-compiler (* byte-mult) byte-compile-associative)
3328 ;;####(byte-defop-compiler move-to-column 1)
3329 (byte-defop-compiler-1 interactive byte-compile-noop)
3332 (defun byte-compile-subr-wrong-args (form n)
3333 (byte-compile-set-symbol-position (car form))
3334 (byte-compile-warn "`%s' called with %d arg%s, but requires %s"
3335 (car form) (length (cdr form))
3336 (if (= 1 (length (cdr form))) "" "s") n)
3337 ;; Get run-time wrong-number-of-args error.
3338 (byte-compile-normal-call form))
3340 (defun byte-compile-no-args (form)
3341 (if (not (= (length form) 1))
3342 (byte-compile-subr-wrong-args form "none")
3343 (byte-compile-out (get (car form) 'byte-opcode) 0)))
3345 (defun byte-compile-one-arg (form)
3346 (if (not (= (length form) 2))
3347 (byte-compile-subr-wrong-args form 1)
3348 (byte-compile-form (car (cdr form))) ;; Push the argument
3349 (byte-compile-out (get (car form) 'byte-opcode) 0)))
3351 (defun byte-compile-two-args (form)
3352 (if (not (= (length form) 3))
3353 (byte-compile-subr-wrong-args form 2)
3354 (byte-compile-form (car (cdr form))) ;; Push the arguments
3355 (byte-compile-form (nth 2 form))
3356 (byte-compile-out (get (car form) 'byte-opcode) 0)))
3358 (defun byte-compile-and-folded (form)
3359 "Compile calls to functions like `<='.
3360 These implicitly `and' together a bunch of two-arg bytecodes."
3361 (let ((l (length form)))
3363 ((< l 3) (byte-compile-form `(progn ,(nth 1 form) t)))
3364 ((= l 3) (byte-compile-two-args form))
3365 ((cl-every #'macroexp-copyable-p (nthcdr 2 form))
3366 (byte-compile-form `(and (,(car form) ,(nth 1 form) ,(nth 2 form))
3367 (,(car form) ,@(nthcdr 2 form)))))
3368 (t (byte-compile-normal-call form)))))
3370 (defun byte-compile-three-args (form)
3371 (if (not (= (length form) 4))
3372 (byte-compile-subr-wrong-args form 3)
3373 (byte-compile-form (car (cdr form))) ;; Push the arguments
3374 (byte-compile-form (nth 2 form))
3375 (byte-compile-form (nth 3 form))
3376 (byte-compile-out (get (car form) 'byte-opcode) 0)))
3378 (defun byte-compile-zero-or-one-arg (form)
3379 (let ((len (length form)))
3380 (cond ((= len 1) (byte-compile-one-arg (append form '(nil))))
3381 ((= len 2) (byte-compile-one-arg form))
3382 (t (byte-compile-subr-wrong-args form "0-1")))))
3384 (defun byte-compile-one-or-two-args (form)
3385 (let ((len (length form)))
3386 (cond ((= len 2) (byte-compile-two-args (append form '(nil))))
3387 ((= len 3) (byte-compile-two-args form))
3388 (t (byte-compile-subr-wrong-args form "1-2")))))
3390 (defun byte-compile-two-or-three-args (form)
3391 (let ((len (length form)))
3392 (cond ((= len 3) (byte-compile-three-args (append form '(nil))))
3393 ((= len 4) (byte-compile-three-args form))
3394 (t (byte-compile-subr-wrong-args form "2-3")))))
3396 (defun byte-compile-noop (_form)
3397 (byte-compile-constant nil))
3399 (defun byte-compile-discard (&optional num preserve-tos)
3400 "Output byte codes to discard the NUM entries at the top of the stack.
3402 If PRESERVE-TOS is non-nil, preserve the top-of-stack value, as if it were
3403 popped before discarding the num values, and then pushed back again after
3405 (if (and (null num) (not preserve-tos))
3407 (byte-compile-out 'byte-discard)
3411 (when (and preserve-tos (> num 0))
3412 ;; Preserve the top-of-stack value by writing it directly to the stack
3413 ;; location which will be at the top-of-stack after popping.
3414 (byte-compile-stack-set (1- (- byte-compile-depth num)))
3415 ;; Now we actually discard one less value, since we want to keep
3417 (setq num (1- num)))
3419 (byte-compile-out 'byte-discard)
3420 (setq num (1- num)))))
3422 (defun byte-compile-stack-ref (stack-pos)
3423 "Output byte codes to push the value at stack position STACK-POS."
3424 (let ((dist (- byte-compile-depth (1+ stack-pos))))
3426 ;; A simple optimization
3427 (byte-compile-out 'byte-dup)
3429 (byte-compile-out 'byte-stack-ref dist))))
3431 (defun byte-compile-stack-set (stack-pos)
3432 "Output byte codes to store the TOS value at stack position STACK-POS."
3433 (byte-compile-out 'byte-stack-set (- byte-compile-depth (1+ stack-pos))))
3435 (byte-defop-compiler-1 internal-make-closure byte-compile-make-closure)
3436 (byte-defop-compiler-1 internal-get-closed-var byte-compile-get-closed-var)
3438 (defun byte-compile-make-closure (form)
3439 "Byte-compile the special `internal-make-closure' form."
3440 (if byte-compile--for-effect (setq byte-compile--for-effect nil)
3441 (let* ((vars (nth 1 form))
3443 (body (nthcdr 3 form))
3445 (byte-compile-lambda `(lambda ,vars . ,body) nil (length env))))
3446 (cl-assert (> (length env) 0)) ;Otherwise, we don't need a closure.
3447 (cl-assert (byte-code-function-p fun))
3448 (byte-compile-form `(make-byte-code
3449 ',(aref fun 0) ',(aref fun 1)
3450 (vconcat (vector . ,env) ',(aref fun 2))
3451 ,@(nthcdr 3 (mapcar (lambda (x) `',x) fun)))))))
3453 (defun byte-compile-get-closed-var (form)
3454 "Byte-compile the special `internal-get-closed-var' form."
3455 (if byte-compile--for-effect (setq byte-compile--for-effect nil)
3456 (byte-compile-out 'byte-constant (nth 1 form))))
3458 ;; Compile a function that accepts one or more args and is right-associative.
3459 ;; We do it by left-associativity so that the operations
3460 ;; are done in the same order as in interpreted code.
3461 ;; We treat the one-arg case, as in (+ x), like (+ x 0).
3462 ;; in order to convert markers to numbers, and trigger expected errors.
3463 (defun byte-compile-associative (form)
3465 (let ((opcode (get (car form) 'byte-opcode))
3467 (if (and (< 3 (length form))
3468 (memq opcode (list (get '+ 'byte-opcode)
3469 (get '* 'byte-opcode))))
3470 ;; Don't use binary operations for > 2 operands, as that
3471 ;; may cause overflow/truncation in float operations.
3472 (byte-compile-normal-call form)
3473 (setq args (copy-sequence (cdr form)))
3474 (byte-compile-form (car args))
3475 (setq args (cdr args))
3476 (or args (setq args '(0)
3477 opcode (get '+ 'byte-opcode)))
3479 (byte-compile-form arg)
3480 (byte-compile-out opcode 0))))
3481 (byte-compile-constant (eval form))))
3484 ;; more complicated compiler macros
3486 (byte-defop-compiler char-before)
3487 (byte-defop-compiler backward-char)
3488 (byte-defop-compiler backward-word)
3489 (byte-defop-compiler list)
3490 (byte-defop-compiler concat)
3491 (byte-defop-compiler fset)
3492 (byte-defop-compiler (indent-to-column byte-indent-to) byte-compile-indent-to)
3493 (byte-defop-compiler indent-to)
3494 (byte-defop-compiler insert)
3495 (byte-defop-compiler-1 function byte-compile-function-form)
3496 (byte-defop-compiler-1 - byte-compile-minus)
3497 (byte-defop-compiler (/ byte-quo) byte-compile-quo)
3498 (byte-defop-compiler nconc)
3500 ;; Is this worth it? Both -before and -after are written in C.
3501 (defun byte-compile-char-before (form)
3502 (cond ((or (= 1 (length form))
3503 (and (= 2 (length form)) (not (nth 1 form))))
3504 (byte-compile-form '(char-after (1- (point)))))
3505 ((= 2 (length form))
3506 (byte-compile-form (list 'char-after (if (numberp (nth 1 form))
3508 `(1- (or ,(nth 1 form)
3510 (t (byte-compile-subr-wrong-args form "0-1"))))
3512 ;; backward-... ==> forward-... with negated argument.
3513 ;; Is this worth it? Both -backward and -forward are written in C.
3514 (defun byte-compile-backward-char (form)
3515 (cond ((or (= 1 (length form))
3516 (and (= 2 (length form)) (not (nth 1 form))))
3517 (byte-compile-form '(forward-char -1)))
3518 ((= 2 (length form))
3519 (byte-compile-form (list 'forward-char (if (numberp (nth 1 form))
3521 `(- (or ,(nth 1 form) 1))))))
3522 (t (byte-compile-subr-wrong-args form "0-1"))))
3524 (defun byte-compile-backward-word (form)
3525 (cond ((or (= 1 (length form))
3526 (and (= 2 (length form)) (not (nth 1 form))))
3527 (byte-compile-form '(forward-word -1)))
3528 ((= 2 (length form))
3529 (byte-compile-form (list 'forward-word (if (numberp (nth 1 form))
3531 `(- (or ,(nth 1 form) 1))))))
3532 (t (byte-compile-subr-wrong-args form "0-1"))))
3534 (defun byte-compile-list (form)
3535 (let ((count (length (cdr form))))
3537 (byte-compile-constant nil))
3539 (mapc 'byte-compile-form (cdr form))
3541 (aref [byte-list1 byte-list2 byte-list3 byte-list4] (1- count)) 0))
3543 (mapc 'byte-compile-form (cdr form))
3544 (byte-compile-out 'byte-listN count))
3545 (t (byte-compile-normal-call form)))))
3547 (defun byte-compile-concat (form)
3548 (let ((count (length (cdr form))))
3549 (cond ((and (< 1 count) (< count 5))
3550 (mapc 'byte-compile-form (cdr form))
3552 (aref [byte-concat2 byte-concat3 byte-concat4] (- count 2))
3554 ;; Concat of one arg is not a no-op if arg is not a string.
3556 (byte-compile-form ""))
3558 (mapc 'byte-compile-form (cdr form))
3559 (byte-compile-out 'byte-concatN count))
3560 ((byte-compile-normal-call form)))))
3562 (defun byte-compile-minus (form)
3563 (let ((len (length form)))
3565 ((= 1 len) (byte-compile-constant 0))
3567 (byte-compile-form (cadr form))
3568 (byte-compile-out 'byte-negate 0))
3570 (byte-compile-form (nth 1 form))
3571 (byte-compile-form (nth 2 form))
3572 (byte-compile-out 'byte-diff 0))
3573 ;; Don't use binary operations for > 2 operands, as that may
3574 ;; cause overflow/truncation in float operations.
3575 (t (byte-compile-normal-call form)))))
3577 (defun byte-compile-quo (form)
3578 (let ((len (length form)))
3580 (byte-compile-subr-wrong-args form "2 or more"))
3582 (byte-compile-two-args form))
3584 ;; Don't use binary operations for > 2 operands, as that
3585 ;; may cause overflow/truncation in float operations.
3586 (byte-compile-normal-call form)))))
3588 (defun byte-compile-nconc (form)
3589 (let ((len (length form)))
3591 (byte-compile-constant nil))
3593 ;; nconc of one arg is a noop, even if that arg isn't a list.
3594 (byte-compile-form (nth 1 form)))
3596 (byte-compile-form (car (setq form (cdr form))))
3597 (while (setq form (cdr form))
3598 (byte-compile-form (car form))
3599 (byte-compile-out 'byte-nconc 0))))))
3601 (defun byte-compile-fset (form)
3602 ;; warn about forms like (fset 'foo '(lambda () ...))
3603 ;; (where the lambda expression is non-trivial...)
3604 (let ((fn (nth 2 form))
3606 (if (and (eq (car-safe fn) 'quote)
3607 (eq (car-safe (setq fn (nth 1 fn))) 'lambda))
3609 (setq body (cdr (cdr fn)))
3610 (if (stringp (car body)) (setq body (cdr body)))
3611 (if (eq 'interactive (car-safe (car body))) (setq body (cdr body)))
3612 (if (and (consp (car body))
3613 (not (eq 'byte-code (car (car body)))))
3615 "A quoted lambda form is the second argument of `fset'. This is probably
3616 not what you want, as that lambda cannot be compiled. Consider using
3617 the syntax #'(lambda (...) ...) instead.")))))
3618 (byte-compile-two-args form))
3620 ;; (function foo) must compile like 'foo, not like (symbol-function 'foo).
3621 ;; Otherwise it will be incompatible with the interpreter,
3622 ;; and (funcall (function foo)) will lose with autoloads.
3624 (defun byte-compile-function-form (form)
3625 (let ((f (nth 1 form)))
3626 (when (and (symbolp f)
3627 (byte-compile-warning-enabled-p 'callargs))
3628 (byte-compile-function-warn f t (byte-compile-fdefinition f nil)))
3630 (byte-compile-constant (if (eq 'lambda (car-safe f))
3631 (byte-compile-lambda f)
3634 (defun byte-compile-indent-to (form)
3635 (let ((len (length form)))
3637 (byte-compile-form (car (cdr form)))
3638 (byte-compile-out 'byte-indent-to 0))
3640 ;; no opcode for 2-arg case.
3641 (byte-compile-normal-call form))
3643 (byte-compile-subr-wrong-args form "1-2")))))
3645 (defun byte-compile-insert (form)
3646 (cond ((null (cdr form))
3647 (byte-compile-constant nil))
3648 ((<= (length form) 256)
3649 (mapc 'byte-compile-form (cdr form))
3650 (if (cdr (cdr form))
3651 (byte-compile-out 'byte-insertN (length (cdr form)))
3652 (byte-compile-out 'byte-insert 0)))
3653 ((memq t (mapcar 'consp (cdr (cdr form))))
3654 (byte-compile-normal-call form))
3655 ;; We can split it; there is no function call after inserting 1st arg.
3657 (while (setq form (cdr form))
3658 (byte-compile-form (car form))
3659 (byte-compile-out 'byte-insert 0)
3661 (byte-compile-discard))))))
3664 (byte-defop-compiler-1 setq)
3665 (byte-defop-compiler-1 setq-default)
3666 (byte-defop-compiler-1 quote)
3668 (defun byte-compile-setq (form)
3669 (let ((args (cdr form)))
3672 (byte-compile-form (car (cdr args)))
3673 (or byte-compile--for-effect (cdr (cdr args))
3674 (byte-compile-out 'byte-dup 0))
3675 (byte-compile-variable-set (car args))
3676 (setq args (cdr (cdr args))))
3677 ;; (setq), with no arguments.
3678 (byte-compile-form nil byte-compile--for-effect))
3679 (setq byte-compile--for-effect nil)))
3681 (defun byte-compile-setq-default (form)
3682 (setq form (cdr form))
3683 (if (null form) ; (setq-default), with no arguments
3684 (byte-compile-form nil byte-compile--for-effect)
3685 (if (> (length form) 2)
3688 (push `(setq-default ,(pop form) ,(pop form)) setters))
3689 (byte-compile-form (cons 'progn (nreverse setters))))
3690 (let ((var (car form)))
3691 (and (or (not (symbolp var))
3692 (macroexp--const-symbol-p var t))
3693 (byte-compile-warning-enabled-p 'constants)
3695 "variable assignment to %s `%s'"
3696 (if (symbolp var) "constant" "nonvariable")
3697 (prin1-to-string var)))
3698 (byte-compile-normal-call `(set-default ',var ,@(cdr form)))))))
3700 (byte-defop-compiler-1 set-default)
3701 (defun byte-compile-set-default (form)
3702 (let ((varexp (car-safe (cdr-safe form))))
3703 (if (eq (car-safe varexp) 'quote)
3704 ;; If the varexp is constant, compile it as a setq-default
3705 ;; so we get more warnings.
3706 (byte-compile-setq-default `(setq-default ,(car-safe (cdr varexp))
3708 (byte-compile-normal-call form))))
3710 (defun byte-compile-quote (form)
3711 (byte-compile-constant (car (cdr form))))
3713 ;;; control structures
3715 (defun byte-compile-body (body &optional for-effect)
3717 (byte-compile-form (car body) t)
3718 (setq body (cdr body)))
3719 (byte-compile-form (car body) for-effect))
3721 (defsubst byte-compile-body-do-effect (body)
3722 (byte-compile-body body byte-compile--for-effect)
3723 (setq byte-compile--for-effect nil))
3725 (defsubst byte-compile-form-do-effect (form)
3726 (byte-compile-form form byte-compile--for-effect)
3727 (setq byte-compile--for-effect nil))
3729 (byte-defop-compiler-1 inline byte-compile-progn)
3730 (byte-defop-compiler-1 progn)
3731 (byte-defop-compiler-1 prog1)
3732 (byte-defop-compiler-1 prog2)
3733 (byte-defop-compiler-1 if)
3734 (byte-defop-compiler-1 cond)
3735 (byte-defop-compiler-1 and)
3736 (byte-defop-compiler-1 or)
3737 (byte-defop-compiler-1 while)
3738 (byte-defop-compiler-1 funcall)
3739 (byte-defop-compiler-1 let)
3740 (byte-defop-compiler-1 let* byte-compile-let)
3742 (defun byte-compile-progn (form)
3743 (byte-compile-body-do-effect (cdr form)))
3745 (defun byte-compile-prog1 (form)
3746 (byte-compile-form-do-effect (car (cdr form)))
3747 (byte-compile-body (cdr (cdr form)) t))
3749 (defun byte-compile-prog2 (form)
3750 (byte-compile-form (nth 1 form) t)
3751 (byte-compile-form-do-effect (nth 2 form))
3752 (byte-compile-body (cdr (cdr (cdr form))) t))
3754 (defmacro byte-compile-goto-if (cond discard tag)
3757 (if ,discard 'byte-goto-if-not-nil 'byte-goto-if-not-nil-else-pop)
3758 (if ,discard 'byte-goto-if-nil 'byte-goto-if-nil-else-pop))
3761 ;; Return the list of items in CONDITION-PARAM that match PRED-LIST.
3762 ;; Only return items that are not in ONLY-IF-NOT-PRESENT.
3763 (defun byte-compile-find-bound-condition (condition-param
3765 &optional only-if-not-present)
3769 (if (memq (car-safe condition-param) pred-list)
3770 ;; The condition appears by itself.
3771 (list condition-param)
3772 ;; If the condition is an `and', look for matches among the
3774 (when (eq 'and (car-safe condition-param))
3775 (cdr condition-param)))))
3777 (dolist (crt cond-list)
3778 (when (and (memq (car-safe crt) pred-list)
3779 (eq 'quote (car-safe (setq nth-one (nth 1 crt))))
3780 ;; Ignore if the symbol is already on the unresolved
3782 (not (assq (nth 1 nth-one) ; the relevant symbol
3783 only-if-not-present)))
3784 (push (nth 1 (nth 1 crt)) result)))
3787 (defmacro byte-compile-maybe-guarded (condition &rest body)
3788 "Execute forms in BODY, potentially guarded by CONDITION.
3789 CONDITION is a variable whose value is a test in an `if' or `cond'.
3790 BODY is the code to compile in the first arm of the if or the body of
3791 the cond clause. If CONDITION's value is of the form (fboundp 'foo)
3792 or (boundp 'foo), the relevant warnings from BODY about foo's
3793 being undefined (or obsolete) will be suppressed.
3795 If CONDITION's value is (not (featurep 'emacs)) or (featurep 'xemacs),
3796 that suppresses all warnings during execution of BODY."
3797 (declare (indent 1) (debug t))
3798 `(let* ((fbound-list (byte-compile-find-bound-condition
3799 ,condition '(fboundp functionp)
3800 byte-compile-unresolved-functions))
3801 (bound-list (byte-compile-find-bound-condition
3802 ,condition '(boundp default-boundp)))
3803 ;; Maybe add to the bound list.
3804 (byte-compile-bound-variables
3805 (append bound-list byte-compile-bound-variables)))
3807 ;; If things not being bound at all is ok, so must them being
3808 ;; obsolete. Note that we add to the existing lists since Tramp
3809 ;; (ab)uses this feature.
3810 (let ((byte-compile-not-obsolete-vars
3811 (append byte-compile-not-obsolete-vars bound-list))
3812 (byte-compile-not-obsolete-funcs
3813 (append byte-compile-not-obsolete-funcs fbound-list)))
3815 ;; Maybe remove the function symbol from the unresolved list.
3816 (dolist (fbound fbound-list)
3818 (setq byte-compile-unresolved-functions
3819 (delq (assq fbound byte-compile-unresolved-functions)
3820 byte-compile-unresolved-functions)))))))
3822 (defun byte-compile-if (form)
3823 (byte-compile-form (car (cdr form)))
3824 ;; Check whether we have `(if (fboundp ...' or `(if (boundp ...'
3825 ;; and avoid warnings about the relevant symbols in the consequent.
3826 (let ((clause (nth 1 form))
3827 (donetag (byte-compile-make-tag)))
3828 (if (null (nthcdr 3 form))
3831 (byte-compile-goto-if nil byte-compile--for-effect donetag)
3832 (byte-compile-maybe-guarded clause
3833 (byte-compile-form (nth 2 form) byte-compile--for-effect))
3834 (byte-compile-out-tag donetag))
3835 (let ((elsetag (byte-compile-make-tag)))
3836 (byte-compile-goto 'byte-goto-if-nil elsetag)
3837 (byte-compile-maybe-guarded clause
3838 (byte-compile-form (nth 2 form) byte-compile--for-effect))
3839 (byte-compile-goto 'byte-goto donetag)
3840 (byte-compile-out-tag elsetag)
3841 (byte-compile-maybe-guarded (list 'not clause)
3842 (byte-compile-body (cdr (cdr (cdr form))) byte-compile--for-effect))
3843 (byte-compile-out-tag donetag))))
3844 (setq byte-compile--for-effect nil))
3846 (defun byte-compile-cond (clauses)
3847 (let ((donetag (byte-compile-make-tag))
3849 (while (setq clauses (cdr clauses))
3850 (setq clause (car clauses))
3851 (cond ((or (eq (car clause) t)
3852 (and (eq (car-safe (car clause)) 'quote)
3853 (car-safe (cdr-safe (car clause)))))
3854 ;; Unconditional clause
3855 (setq clause (cons t clause)
3858 (byte-compile-form (car clause))
3859 (if (null (cdr clause))
3860 ;; First clause is a singleton.
3861 (byte-compile-goto-if t byte-compile--for-effect donetag)
3862 (setq nexttag (byte-compile-make-tag))
3863 (byte-compile-goto 'byte-goto-if-nil nexttag)
3864 (byte-compile-maybe-guarded (car clause)
3865 (byte-compile-body (cdr clause) byte-compile--for-effect))
3866 (byte-compile-goto 'byte-goto donetag)
3867 (byte-compile-out-tag nexttag)))))
3869 (let ((guard (car clause)))
3870 (and (cdr clause) (not (eq guard t))
3871 (progn (byte-compile-form guard)
3872 (byte-compile-goto-if nil byte-compile--for-effect donetag)
3873 (setq clause (cdr clause))))
3874 (byte-compile-maybe-guarded guard
3875 (byte-compile-body-do-effect clause)))
3876 (byte-compile-out-tag donetag)))
3878 (defun byte-compile-and (form)
3879 (let ((failtag (byte-compile-make-tag))
3882 (byte-compile-form-do-effect t)
3883 (byte-compile-and-recursion args failtag))))
3885 ;; Handle compilation of a nontrivial `and' call.
3886 ;; We use tail recursion so we can use byte-compile-maybe-guarded.
3887 (defun byte-compile-and-recursion (rest failtag)
3890 (byte-compile-form (car rest))
3891 (byte-compile-goto-if nil byte-compile--for-effect failtag)
3892 (byte-compile-maybe-guarded (car rest)
3893 (byte-compile-and-recursion (cdr rest) failtag)))
3894 (byte-compile-form-do-effect (car rest))
3895 (byte-compile-out-tag failtag)))
3897 (defun byte-compile-or (form)
3898 (let ((wintag (byte-compile-make-tag))
3901 (byte-compile-form-do-effect nil)
3902 (byte-compile-or-recursion args wintag))))
3904 ;; Handle compilation of a nontrivial `or' call.
3905 ;; We use tail recursion so we can use byte-compile-maybe-guarded.
3906 (defun byte-compile-or-recursion (rest wintag)
3909 (byte-compile-form (car rest))
3910 (byte-compile-goto-if t byte-compile--for-effect wintag)
3911 (byte-compile-maybe-guarded (list 'not (car rest))
3912 (byte-compile-or-recursion (cdr rest) wintag)))
3913 (byte-compile-form-do-effect (car rest))
3914 (byte-compile-out-tag wintag)))
3916 (defun byte-compile-while (form)
3917 (let ((endtag (byte-compile-make-tag))
3918 (looptag (byte-compile-make-tag)))
3919 (byte-compile-out-tag looptag)
3920 (byte-compile-form (car (cdr form)))
3921 (byte-compile-goto-if nil byte-compile--for-effect endtag)
3922 (byte-compile-body (cdr (cdr form)) t)
3923 (byte-compile-goto 'byte-goto looptag)
3924 (byte-compile-out-tag endtag)
3925 (setq byte-compile--for-effect nil)))
3927 (defun byte-compile-funcall (form)
3928 (mapc 'byte-compile-form (cdr form))
3929 (byte-compile-out 'byte-call (length (cdr (cdr form)))))
3934 (defun byte-compile-push-binding-init (clause)
3935 "Emit byte-codes to push the initialization value for CLAUSE on the stack.
3936 Return the offset in the form (VAR . OFFSET)."
3937 (let* ((var (if (consp clause) (car clause) clause)))
3938 ;; We record the stack position even of dynamic bindings; we'll put
3939 ;; them in the proper place later.
3940 (prog1 (cons var byte-compile-depth)
3942 (byte-compile-form (cadr clause))
3943 (byte-compile-push-constant nil)))))
3945 (defun byte-compile-not-lexical-var-p (var)
3946 (or (not (symbolp var))
3947 (special-variable-p var)
3948 (memq var byte-compile-bound-variables)
3952 (defun byte-compile-bind (var init-lexenv)
3953 "Emit byte-codes to bind VAR and update `byte-compile--lexical-environment'.
3954 INIT-LEXENV should be a lexical-environment alist describing the
3955 positions of the init value that have been pushed on the stack.
3956 Return non-nil if the TOS value was popped."
3957 ;; The mix of lexical and dynamic bindings mean that we may have to
3958 ;; juggle things on the stack, to move them to TOS for
3960 (if (and lexical-binding (not (byte-compile-not-lexical-var-p var)))
3961 ;; VAR is a simple stack-allocated lexical variable.
3962 (progn (push (assq var init-lexenv)
3963 byte-compile--lexical-environment)
3965 ;; VAR should be dynamically bound.
3966 (while (assq var byte-compile--lexical-environment)
3967 ;; This dynamic binding shadows a lexical binding.
3968 (setq byte-compile--lexical-environment
3969 (remq (assq var byte-compile--lexical-environment)
3970 byte-compile--lexical-environment)))
3972 ((eq var (caar init-lexenv))
3973 ;; VAR is dynamic and is on the top of the
3974 ;; stack, so we can just bind it like usual.
3975 (byte-compile-dynamic-variable-bind var)
3978 ;; VAR is dynamic, but we have to get its
3979 ;; value out of the middle of the stack.
3980 (let ((stack-pos (cdr (assq var init-lexenv))))
3981 (byte-compile-stack-ref stack-pos)
3982 (byte-compile-dynamic-variable-bind var)
3983 ;; Now we have to store nil into its temporary
3984 ;; stack position so it doesn't prevent the value from being GC'd.
3985 ;; FIXME: Not worth the trouble.
3986 ;; (byte-compile-push-constant nil)
3987 ;; (byte-compile-stack-set stack-pos)
3991 (defun byte-compile-unbind (clauses init-lexenv preserve-body-value)
3992 "Emit byte-codes to unbind the variables bound by CLAUSES.
3993 CLAUSES is a `let'-style variable binding list. INIT-LEXENV should be a
3994 lexical-environment alist describing the positions of the init value that
3995 have been pushed on the stack. If PRESERVE-BODY-VALUE is true,
3996 then an additional value on the top of the stack, above any lexical binding
3997 slots, is preserved, so it will be on the top of the stack after all
3998 binding slots have been popped."
3999 ;; Unbind dynamic variables.
4000 (let ((num-dynamic-bindings 0))
4001 (dolist (clause clauses)
4002 (unless (assq (if (consp clause) (car clause) clause)
4003 byte-compile--lexical-environment)
4004 (setq num-dynamic-bindings (1+ num-dynamic-bindings))))
4005 (unless (zerop num-dynamic-bindings)
4006 (byte-compile-out 'byte-unbind num-dynamic-bindings)))
4007 ;; Pop lexical variables off the stack, possibly preserving the
4008 ;; return value of the body.
4010 ;; INIT-LEXENV contains all init values left on the stack.
4011 (byte-compile-discard (length init-lexenv) preserve-body-value)))
4013 (defun byte-compile-let (form)
4014 "Generate code for the `let' or `let*' form FORM."
4015 (let ((clauses (cadr form))
4017 (is-let (eq (car form) 'let)))
4019 ;; First compute the binding values in the old scope.
4020 (dolist (var clauses)
4021 (push (byte-compile-push-binding-init var) init-lexenv)))
4023 (let ((byte-compile-bound-variables byte-compile-bound-variables)
4024 (byte-compile--lexical-environment
4025 byte-compile--lexical-environment))
4026 ;; Bind the variables.
4027 ;; For `let', do it in reverse order, because it makes no
4028 ;; semantic difference, but it is a lot more efficient since the
4029 ;; values are now in reverse order on the stack.
4030 (dolist (var (if is-let (reverse clauses) clauses))
4032 (push (byte-compile-push-binding-init var) init-lexenv))
4033 (let ((var (if (consp var) (car var) var)))
4034 (if (byte-compile-bind var init-lexenv)
4035 (pop init-lexenv))))
4037 (let ((init-stack-depth byte-compile-depth))
4038 (byte-compile-body-do-effect (cdr (cdr form)))
4039 ;; Unbind both lexical and dynamic variables.
4040 (cl-assert (or (eq byte-compile-depth init-stack-depth)
4041 (eq byte-compile-depth (1+ init-stack-depth))))
4042 (byte-compile-unbind clauses init-lexenv
4043 (> byte-compile-depth init-stack-depth))))))
4047 (byte-defop-compiler-1 /= byte-compile-negated)
4048 (byte-defop-compiler-1 atom byte-compile-negated)
4049 (byte-defop-compiler-1 nlistp byte-compile-negated)
4051 (put '/= 'byte-compile-negated-op '=)
4052 (put 'atom 'byte-compile-negated-op 'consp)
4053 (put 'nlistp 'byte-compile-negated-op 'listp)
4055 (defun byte-compile-negated (form)
4056 (byte-compile-form-do-effect (byte-compile-negation-optimizer form)))
4058 ;; Even when optimization is off, /= is optimized to (not (= ...)).
4059 (defun byte-compile-negation-optimizer (form)
4060 ;; an optimizer for forms where <form1> is less efficient than (not <form2>)
4061 (byte-compile-set-symbol-position (car form))
4063 (cons (or (get (car form) 'byte-compile-negated-op)
4065 "Compiler error: `%s' has no `byte-compile-negated-op' property"
4069 ;;; other tricky macro-like special-forms
4071 (byte-defop-compiler-1 catch)
4072 (byte-defop-compiler-1 unwind-protect)
4073 (byte-defop-compiler-1 condition-case)
4074 (byte-defop-compiler-1 save-excursion)
4075 (byte-defop-compiler-1 save-current-buffer)
4076 (byte-defop-compiler-1 save-restriction)
4077 ;; (byte-defop-compiler-1 save-window-excursion) ;Obsolete: now a macro.
4078 ;; (byte-defop-compiler-1 with-output-to-temp-buffer) ;Obsolete: now a macro.
4080 (defvar byte-compile--use-old-handlers nil
4081 "If nil, use new byte codes introduced in Emacs-24.4.")
4083 (defun byte-compile-catch (form)
4084 (byte-compile-form (car (cdr form)))
4085 (if (not byte-compile--use-old-handlers)
4086 (let ((endtag (byte-compile-make-tag)))
4087 (byte-compile-goto 'byte-pushcatch endtag)
4088 (byte-compile-body (cddr form) nil)
4089 (byte-compile-out 'byte-pophandler)
4090 (byte-compile-out-tag endtag))
4093 (byte-compile-form `(list 'funcall ,f)))
4095 (byte-compile-push-constant
4096 (byte-compile-top-level (cons 'progn body) byte-compile--for-effect))))
4097 (byte-compile-out 'byte-catch 0)))
4099 (defun byte-compile-unwind-protect (form)
4103 (if byte-compile--use-old-handlers `(list (list 'funcall ,f)) f)))
4105 (if byte-compile--use-old-handlers
4106 (byte-compile-push-constant
4107 (byte-compile-top-level-body handlers t))
4108 (byte-compile-form `#'(lambda () ,@handlers)))))
4109 (byte-compile-out 'byte-unwind-protect 0)
4110 (byte-compile-form-do-effect (car (cdr form)))
4111 (byte-compile-out 'byte-unbind 1))
4113 (defun byte-compile-condition-case (form)
4114 (if byte-compile--use-old-handlers
4115 (byte-compile-condition-case--old form)
4116 (byte-compile-condition-case--new form)))
4118 (defun byte-compile-condition-case--old (form)
4119 (let* ((var (nth 1 form))
4120 (fun-bodies (eq var :fun-body))
4121 (byte-compile-bound-variables
4122 (if (and var (not fun-bodies))
4123 (cons var byte-compile-bound-variables)
4124 byte-compile-bound-variables)))
4125 (byte-compile-set-symbol-position 'condition-case)
4126 (unless (symbolp var)
4128 "`%s' is not a variable-name or nil (in condition-case)" var))
4129 (if fun-bodies (setq var (make-symbol "err")))
4130 (byte-compile-push-constant var)
4132 (byte-compile-form `(list 'funcall ,(nth 2 form)))
4133 (byte-compile-push-constant
4134 (byte-compile-top-level (nth 2 form) byte-compile--for-effect)))
4135 (let ((compiled-clauses
4138 (let ((condition (car clause)))
4139 (cond ((not (or (symbolp condition)
4140 (and (listp condition)
4142 (dolist (sym condition)
4143 (if (not (symbolp sym))
4147 "`%S' is not a condition name or list of such (in condition-case)"
4149 ;; (not (or (eq condition 't)
4150 ;; (and (stringp (get condition 'error-message))
4151 ;; (consp (get condition
4152 ;; 'error-conditions)))))
4153 ;; (byte-compile-warn
4154 ;; "`%s' is not a known condition name
4155 ;; (in condition-case)"
4159 `(list ',condition (list 'funcall ,(cadr clause) ',var))
4161 (byte-compile-top-level-body
4162 (cdr clause) byte-compile--for-effect)))))
4163 (cdr (cdr (cdr form))))))
4165 (byte-compile-form `(list ,@compiled-clauses))
4166 (byte-compile-push-constant compiled-clauses)))
4167 (byte-compile-out 'byte-condition-case 0)))
4169 (defun byte-compile-condition-case--new (form)
4170 (let* ((var (nth 1 form))
4172 (depth byte-compile-depth)
4173 (clauses (mapcar (lambda (clause)
4174 (cons (byte-compile-make-tag) clause))
4176 (endtag (byte-compile-make-tag)))
4177 (byte-compile-set-symbol-position 'condition-case)
4178 (unless (symbolp var)
4180 "`%s' is not a variable-name or nil (in condition-case)" var))
4182 (dolist (clause (reverse clauses))
4183 (let ((condition (nth 1 clause)))
4184 (unless (consp condition) (setq condition (list condition)))
4185 (dolist (c condition)
4186 (unless (and c (symbolp c))
4188 "`%S' is not a condition name (in condition-case)" c))
4189 ;; In reality, the `error-conditions' property is only required
4190 ;; for the argument to `signal', not to `condition-case'.
4191 ;;(unless (consp (get c 'error-conditions))
4192 ;; (byte-compile-warn
4193 ;; "`%s' is not a known condition name (in condition-case)"
4196 (byte-compile-push-constant condition))
4197 (byte-compile-goto 'byte-pushconditioncase (car clause)))
4199 (byte-compile-form body) ;; byte-compile--for-effect
4200 (dolist (_ clauses) (byte-compile-out 'byte-pophandler))
4201 (byte-compile-goto 'byte-goto endtag)
4204 (let ((clause (pop clauses))
4205 (byte-compile-bound-variables byte-compile-bound-variables)
4206 (byte-compile--lexical-environment
4207 byte-compile--lexical-environment))
4208 (setq byte-compile-depth (1+ depth))
4209 (byte-compile-out-tag (pop clause))
4210 (dolist (_ clauses) (byte-compile-out 'byte-pophandler))
4212 ((null var) (byte-compile-discard))
4214 (push (cons var (1- byte-compile-depth))
4215 byte-compile--lexical-environment))
4216 (t (byte-compile-dynamic-variable-bind var)))
4217 (byte-compile-body (cdr clause)) ;; byte-compile--for-effect
4220 (lexical-binding (byte-compile-discard 1 'preserve-tos))
4221 (t (byte-compile-out 'byte-unbind 1)))
4222 (byte-compile-goto 'byte-goto endtag)))
4224 (byte-compile-out-tag endtag)))
4226 (defun byte-compile-save-excursion (form)
4227 (if (and (eq 'set-buffer (car-safe (car-safe (cdr form))))
4228 (byte-compile-warning-enabled-p 'suspicious))
4230 "Use `with-current-buffer' rather than save-excursion+set-buffer"))
4231 (byte-compile-out 'byte-save-excursion 0)
4232 (byte-compile-body-do-effect (cdr form))
4233 (byte-compile-out 'byte-unbind 1))
4235 (defun byte-compile-save-restriction (form)
4236 (byte-compile-out 'byte-save-restriction 0)
4237 (byte-compile-body-do-effect (cdr form))
4238 (byte-compile-out 'byte-unbind 1))
4240 (defun byte-compile-save-current-buffer (form)
4241 (byte-compile-out 'byte-save-current-buffer 0)
4242 (byte-compile-body-do-effect (cdr form))
4243 (byte-compile-out 'byte-unbind 1))
4245 ;;; top-level forms elsewhere
4247 (byte-defop-compiler-1 defvar)
4248 (byte-defop-compiler-1 defconst byte-compile-defvar)
4249 (byte-defop-compiler-1 autoload)
4250 (byte-defop-compiler-1 lambda byte-compile-lambda-form)
4252 ;; If foo.el declares `toto' as obsolete, it is likely that foo.el will
4253 ;; actually use `toto' in order for this obsolete variable to still work
4254 ;; correctly, so paradoxically, while byte-compiling foo.el, the presence
4255 ;; of a make-obsolete-variable call for `toto' is an indication that `toto'
4256 ;; should not trigger obsolete-warnings in foo.el.
4257 (byte-defop-compiler-1 make-obsolete-variable)
4258 (defun byte-compile-make-obsolete-variable (form)
4259 (when (eq 'quote (car-safe (nth 1 form)))
4260 (push (nth 1 (nth 1 form)) byte-compile-global-not-obsolete-vars))
4261 (byte-compile-normal-call form))
4263 (defconst byte-compile-tmp-var (make-symbol "def-tmp-var"))
4265 (defun byte-compile-defvar (form)
4266 ;; This is not used for file-level defvar/consts.
4267 (when (and (symbolp (nth 1 form))
4268 (not (string-match "[-*/:$]" (symbol-name (nth 1 form))))
4269 (byte-compile-warning-enabled-p 'lexical))
4270 (byte-compile-warn "global/dynamic var `%s' lacks a prefix"
4272 (let ((fun (nth 0 form))
4274 (value (nth 2 form))
4275 (string (nth 3 form)))
4276 (byte-compile-set-symbol-position fun)
4277 (when (or (> (length form) 4)
4278 (and (eq fun 'defconst) (null (cddr form))))
4279 (let ((ncall (length (cdr form))))
4281 "`%s' called with %d argument%s, but %s %s"
4283 (if (= 1 ncall) "" "s")
4284 (if (< ncall 2) "requires" "accepts only")
4286 (push var byte-compile-bound-variables)
4287 (if (eq fun 'defconst)
4288 (push var byte-compile-const-variables))
4289 (when (and string (not (stringp string)))
4290 (byte-compile-warn "third arg to `%s %s' is not a string: %s"
4292 (byte-compile-form-do-effect
4293 (if (cddr form) ; `value' provided
4294 ;; Quote with `quote' to prevent byte-compiling the body,
4295 ;; which would lead to an inf-loop.
4296 `(funcall '(lambda (,byte-compile-tmp-var)
4297 (,fun ,var ,byte-compile-tmp-var ,@(nthcdr 3 form)))
4299 (if (eq fun 'defconst)
4300 ;; This will signal an appropriate error at runtime.
4302 ;; A simple (defvar foo) just returns foo.
4305 (defun byte-compile-autoload (form)
4306 (byte-compile-set-symbol-position 'autoload)
4307 (and (macroexp-const-p (nth 1 form))
4308 (macroexp-const-p (nth 5 form))
4309 (memq (eval (nth 5 form)) '(t macro)) ; macro-p
4310 (not (fboundp (eval (nth 1 form))))
4312 "The compiler ignores `autoload' except at top level. You should
4313 probably put the autoload of the macro `%s' at top-level."
4314 (eval (nth 1 form))))
4315 (byte-compile-normal-call form))
4317 ;; Lambdas in valid places are handled as special cases by various code.
4318 ;; The ones that remain are errors.
4319 (defun byte-compile-lambda-form (_form)
4320 (byte-compile-set-symbol-position 'lambda)
4321 (error "`lambda' used as function name is invalid"))
4323 ;; Compile normally, but deal with warnings for the function being defined.
4324 (put 'defalias 'byte-hunk-handler 'byte-compile-file-form-defalias)
4325 ;; Used for eieio--defalias as well.
4326 (defun byte-compile-file-form-defalias (form)
4327 ;; For the compilation itself, we could largely get rid of this hunk-handler,
4328 ;; if it weren't for the fact that we need to figure out when a defalias
4329 ;; defines a macro, so as to add it to byte-compile-macro-environment.
4331 ;; FIXME: we also use this hunk-handler to implement the function's dynamic
4332 ;; docstring feature. We could actually implement it more elegantly in
4333 ;; byte-compile-lambda so it applies to all lambdas, but the problem is that
4334 ;; the resulting .elc format will not be recognized by make-docfile, so
4335 ;; either we stop using DOC for the docstrings of preloaded elc files (at the
4336 ;; cost of around 24KB on 32bit hosts, double on 64bit hosts) or we need to
4337 ;; build DOC in a more clever way (e.g. handle anonymous elements).
4338 (let ((byte-compile-free-references nil)
4339 (byte-compile-free-assignments nil))
4341 ;; Decompose `form' into:
4342 ;; - `name' is the name of the defined function.
4343 ;; - `arg' is the expression to which it is defined.
4344 ;; - `rest' is the rest of the arguments.
4345 (`(,_ ',name ,arg . ,rest)
4347 ;; `macro' is non-nil if it defines a macro.
4348 ;; `fun' is the function part of `arg' (defaults to `arg').
4349 (((or (and (or `(cons 'macro ,fun) `'(macro . ,fun)) (let macro t))
4350 (and (let fun arg) (let macro nil)))
4352 ;; `lam' is the lambda expression in `fun' (or nil if not
4354 ((or `(,(or `quote `function) ,lam) (let lam nil))
4356 ;; `arglist' is the list of arguments (or t if not recognized).
4357 ;; `body' is the body of `lam' (or t if not recognized).
4358 ((or `(lambda ,arglist . ,body)
4359 ;; `(closure ,_ ,arglist . ,body)
4360 (and `(internal-make-closure ,arglist . ,_) (let body t))
4361 (and (let arglist t) (let body t)))
4363 (unless (byte-compile-file-form-defmumble
4364 name macro arglist body rest)
4367 (message "Macro %s unrecognized, won't work in file" name)
4368 (message "Macro %s partly recognized, trying our luck" name)
4369 (push (cons name (eval fun))
4370 byte-compile-macro-environment)))
4371 (byte-compile-keep-pending form))))
4373 ;; We used to just do: (byte-compile-normal-call form)
4374 ;; But it turns out that this fails to optimize the code.
4375 ;; So instead we now do the same as what other byte-hunk-handlers do,
4376 ;; which is to call back byte-compile-file-form and then return nil.
4377 ;; Except that we can't just call byte-compile-file-form since it would
4378 ;; call us right back.
4379 (t (byte-compile-keep-pending form)))))
4381 (byte-defop-compiler-1 with-no-warnings byte-compile-no-warnings)
4382 (defun byte-compile-no-warnings (form)
4383 (let (byte-compile-warnings)
4384 (byte-compile-form (cons 'progn (cdr form)))))
4386 ;; Warn about misuses of make-variable-buffer-local.
4387 (byte-defop-compiler-1 make-variable-buffer-local
4388 byte-compile-make-variable-buffer-local)
4389 (defun byte-compile-make-variable-buffer-local (form)
4390 (if (and (eq (car-safe (car-safe (cdr-safe form))) 'quote)
4391 (byte-compile-warning-enabled-p 'make-local))
4393 "`make-variable-buffer-local' not called at toplevel"))
4394 (byte-compile-normal-call form))
4395 (put 'make-variable-buffer-local
4396 'byte-hunk-handler 'byte-compile-form-make-variable-buffer-local)
4397 (defun byte-compile-form-make-variable-buffer-local (form)
4398 (byte-compile-keep-pending form 'byte-compile-normal-call))
4402 ;; Note: Most operations will strip off the 'TAG, but it speeds up
4403 ;; optimization to have the 'TAG as a part of the tag.
4404 ;; Tags will be (TAG . (tag-number . stack-depth)).
4405 (defun byte-compile-make-tag ()
4406 (list 'TAG (setq byte-compile-tag-number (1+ byte-compile-tag-number))))
4409 (defun byte-compile-out-tag (tag)
4410 (setq byte-compile-output (cons tag byte-compile-output))
4413 ;; ## remove this someday
4414 (and byte-compile-depth
4415 (not (= (cdr (cdr tag)) byte-compile-depth))
4416 (error "Compiler bug: depth conflict at tag %d" (car (cdr tag))))
4417 (setq byte-compile-depth (cdr (cdr tag))))
4418 (setcdr (cdr tag) byte-compile-depth)))
4420 (defun byte-compile-goto (opcode tag)
4421 (push (cons opcode tag) byte-compile-output)
4422 (setcdr (cdr tag) (if (memq opcode byte-goto-always-pop-ops)
4423 (1- byte-compile-depth)
4424 byte-compile-depth))
4425 (setq byte-compile-depth (and (not (eq opcode 'byte-goto))
4426 (1- byte-compile-depth))))
4428 (defun byte-compile-stack-adjustment (op operand)
4429 "Return the amount by which an operation adjusts the stack.
4430 OP and OPERAND are as passed to `byte-compile-out'."
4431 (if (memq op '(byte-call byte-discardN byte-discardN-preserve-tos))
4432 ;; For calls, OPERAND is the number of args, so we pop OPERAND + 1
4433 ;; elements, and the push the result, for a total of -OPERAND.
4434 ;; For discardN*, of course, we just pop OPERAND elements.
4436 (or (aref byte-stack+-info (symbol-value op))
4437 ;; Ops with a nil entry in `byte-stack+-info' are byte-codes
4438 ;; that take OPERAND values off the stack and push a result, for
4439 ;; a total of 1 - OPERAND
4442 (defun byte-compile-out (op &optional operand)
4443 (push (cons op operand) byte-compile-output)
4444 (if (eq op 'byte-return)
4445 ;; This is actually an unnecessary case, because there should be no
4446 ;; more ops behind byte-return.
4447 (setq byte-compile-depth nil)
4448 (setq byte-compile-depth
4449 (+ byte-compile-depth (byte-compile-stack-adjustment op operand)))
4450 (setq byte-compile-maxdepth (max byte-compile-depth byte-compile-maxdepth))
4451 ;;(if (< byte-compile-depth 0) (error "Compiler error: stack underflow"))
4456 (defun byte-compile-annotate-call-tree (form)
4458 ;; annotate the current call
4459 (if (setq entry (assq (car form) byte-compile-call-tree))
4460 (or (memq byte-compile-current-form (nth 1 entry)) ;callers
4462 (cons byte-compile-current-form (nth 1 entry))))
4463 (setq byte-compile-call-tree
4464 (cons (list (car form) (list byte-compile-current-form) nil)
4465 byte-compile-call-tree)))
4466 ;; annotate the current function
4467 (if (setq entry (assq byte-compile-current-form byte-compile-call-tree))
4468 (or (memq (car form) (nth 2 entry)) ;called
4469 (setcar (cdr (cdr entry))
4470 (cons (car form) (nth 2 entry))))
4471 (setq byte-compile-call-tree
4472 (cons (list byte-compile-current-form nil (list (car form)))
4473 byte-compile-call-tree)))
4476 ;; Renamed from byte-compile-report-call-tree
4477 ;; to avoid interfering with completion of byte-compile-file.
4479 (defun display-call-tree (&optional filename)
4480 "Display a call graph of a specified file.
4481 This lists which functions have been called, what functions called
4482 them, and what functions they call. The list includes all functions
4483 whose definitions have been compiled in this Emacs session, as well as
4484 all functions called by those functions.
4486 The call graph does not include macros, inline functions, or
4487 primitives that the byte-code interpreter knows about directly \(eq,
4490 The call tree also lists those functions which are not known to be called
4491 \(that is, to which no calls have been compiled\), and which cannot be
4492 invoked interactively."
4494 (message "Generating call tree...")
4495 (with-output-to-temp-buffer "*Call-Tree*"
4496 (set-buffer "*Call-Tree*")
4498 (message "Generating call tree... (sorting on %s)"
4499 byte-compile-call-tree-sort)
4500 (insert "Call tree for "
4501 (cond ((null byte-compile-current-file) (or filename "???"))
4502 ((stringp byte-compile-current-file)
4503 byte-compile-current-file)
4504 (t (buffer-name byte-compile-current-file)))
4506 (prin1-to-string byte-compile-call-tree-sort)
4508 (if byte-compile-call-tree-sort
4509 (setq byte-compile-call-tree
4510 (sort byte-compile-call-tree
4511 (pcase byte-compile-call-tree-sort
4513 (lambda (x y) (< (length (nth 1 x))
4514 (length (nth 1 y)))))
4516 (lambda (x y) (< (length (nth 2 x))
4517 (length (nth 2 y)))))
4519 (lambda (x y) (< (+ (length (nth 1 x))
4521 (+ (length (nth 1 y))
4522 (length (nth 2 y))))))
4524 (lambda (x y) (string< (car x) (car y))))
4525 (_ (error "`byte-compile-call-tree-sort': `%s' - unknown sort mode"
4526 byte-compile-call-tree-sort))))))
4527 (message "Generating call tree...")
4528 (let ((rest byte-compile-call-tree)
4529 (b (current-buffer))
4533 (prin1 (car (car rest)) b)
4534 (setq callers (nth 1 (car rest))
4535 calls (nth 2 (car rest)))
4537 (cond ((not (fboundp (setq f (car (car rest)))))
4539 " <top level>";; shouldn't insert nil then, actually -sk
4541 ((subrp (setq f (symbol-function f)))
4544 (format " ==> %s" f))
4545 ((byte-code-function-p f)
4546 "<compiled function>")
4548 "<malformed function>")
4549 ((eq 'macro (car f))
4550 (if (or (byte-code-function-p (cdr f))
4551 (assq 'byte-code (cdr (cdr (cdr f)))))
4554 ((assq 'byte-code (cdr (cdr f)))
4555 "<compiled lambda>")
4556 ((eq 'lambda (car f))
4559 (format " (%d callers + %d calls = %d)"
4560 ;; Does the optimizer eliminate common subexpressions?-sk
4563 (+ (length callers) (length calls)))
4567 (insert " called by:\n")
4569 (insert " " (if (car callers)
4570 (mapconcat 'symbol-name callers ", ")
4572 (let ((fill-prefix " "))
4573 (fill-region-as-paragraph p (point)))
4574 (unless (= 0 (current-column))
4578 (insert " calls:\n")
4580 (insert " " (mapconcat 'symbol-name calls ", "))
4581 (let ((fill-prefix " "))
4582 (fill-region-as-paragraph p (point)))
4583 (unless (= 0 (current-column))
4585 (setq rest (cdr rest)))
4587 (message "Generating call tree...(finding uncalled functions...)")
4588 (setq rest byte-compile-call-tree)
4591 (or (nth 1 (car rest))
4592 (null (setq f (caar rest)))
4594 (setq def (byte-compile-fdefinition f t))
4595 (and (eq (car-safe def) 'macro)
4596 (eq (car-safe (cdr-safe def)) 'lambda)
4597 (setq def (cdr def)))
4600 (setq def (byte-compile-fdefinition f nil))
4601 (and (eq (car-safe def) 'macro)
4602 (eq (car-safe (cdr-safe def)) 'lambda)
4603 (setq def (cdr def)))
4605 (setq uncalled (cons f uncalled)))
4606 (setq rest (cdr rest)))
4608 (let ((fill-prefix " "))
4609 (insert "Noninteractive functions not known to be called:\n ")
4611 (insert (mapconcat 'symbol-name (nreverse uncalled) ", "))
4612 (fill-region-as-paragraph p (point))))))
4613 (message "Generating call tree...done.")))
4617 (defun batch-byte-compile-if-not-done ()
4618 "Like `byte-compile-file' but doesn't recompile if already up to date.
4619 Use this from the command line, with `-batch';
4620 it won't work in an interactive Emacs."
4621 (batch-byte-compile t))
4623 ;;; by crl@newton.purdue.edu
4624 ;;; Only works noninteractively.
4626 (defun batch-byte-compile (&optional noforce)
4627 "Run `byte-compile-file' on the files remaining on the command line.
4628 Use this from the command line, with `-batch';
4629 it won't work in an interactive Emacs.
4630 Each file is processed even if an error occurred previously.
4631 For example, invoke \"emacs -batch -f batch-byte-compile $emacs/ ~/*.el\".
4632 If NOFORCE is non-nil, don't recompile a file that seems to be
4633 already up-to-date."
4634 ;; command-line-args-left is what is left of the command line, from
4636 (defvar command-line-args-left) ;Avoid 'free variable' warning
4637 (if (not noninteractive)
4638 (error "`batch-byte-compile' is to be used only with -batch"))
4640 (while command-line-args-left
4641 (if (file-directory-p (expand-file-name (car command-line-args-left)))
4642 ;; Directory as argument.
4644 (dolist (file (directory-files (car command-line-args-left)))
4645 (if (and (string-match emacs-lisp-file-regexp file)
4646 (not (auto-save-file-name-p file))
4648 (expand-file-name file
4649 (car command-line-args-left)))
4650 (setq dest (byte-compile-dest-file source))
4651 (file-exists-p dest)
4652 (file-newer-than-file-p source dest))
4653 (if (null (batch-byte-compile-file source))
4655 ;; Specific file argument
4656 (if (or (not noforce)
4657 (let* ((source (car command-line-args-left))
4658 (dest (byte-compile-dest-file source)))
4659 (or (not (file-exists-p dest))
4660 (file-newer-than-file-p source dest))))
4661 (if (null (batch-byte-compile-file (car command-line-args-left)))
4663 (setq command-line-args-left (cdr command-line-args-left)))
4664 (kill-emacs (if error 1 0))))
4666 (defun batch-byte-compile-file (file)
4667 (let ((byte-compile-root-dir (or byte-compile-root-dir default-directory)))
4669 (byte-compile-file file)
4671 (byte-compile-file file)
4673 (message (if (cdr err)
4674 ">>Error occurred processing %s: %s (%s)"
4675 ">>Error occurred processing %s: %s")
4677 (get (car err) 'error-message)
4678 (prin1-to-string (cdr err)))
4679 (let ((destfile (byte-compile-dest-file file)))
4680 (if (file-exists-p destfile)
4681 (delete-file destfile)))
4684 (message (if (cdr err)
4685 ">>Error occurred processing %s: %s (%s)"
4686 ">>Error occurred processing %s: %s")
4688 (get (car err) 'error-message)
4689 (prin1-to-string (cdr err)))
4692 (defun byte-compile-refresh-preloaded ()
4693 "Reload any Lisp file that was changed since Emacs was dumped.
4695 (let* ((argv0 (car command-line-args))
4696 (emacs-file (executable-find argv0)))
4697 (if (not (and emacs-file (file-executable-p emacs-file)))
4698 (message "Can't find %s to refresh preloaded Lisp files" argv0)
4699 (dolist (f (reverse load-history))
4701 (if (string-match "elc\\'" f) (setq f (substring f 0 -1)))
4702 (when (and (file-readable-p f)
4703 (file-newer-than-file-p f emacs-file)
4704 ;; Don't reload the source version of the files below
4705 ;; because that causes subsequent byte-compilation to
4706 ;; be a lot slower and need a higher max-lisp-eval-depth,
4707 ;; so it can cause recompilation to fail.
4708 (not (member (file-name-nondirectory f)
4709 '("pcase.el" "bytecomp.el" "macroexp.el"
4710 "cconv.el" "byte-opt.el"))))
4711 (message "Reloading stale %s" (file-name-nondirectory f))
4713 (load f 'noerror nil 'nosuffix)
4714 ;; Probably shouldn't happen, but in case of an error, it seems
4715 ;; at least as useful to ignore it as it is to stop compilation.
4719 (defun batch-byte-recompile-directory (&optional arg)
4720 "Run `byte-recompile-directory' on the dirs remaining on the command line.
4721 Must be used only with `-batch', and kills Emacs on completion.
4722 For example, invoke `emacs -batch -f batch-byte-recompile-directory .'.
4724 Optional argument ARG is passed as second argument ARG to
4725 `byte-recompile-directory'; see there for its possible values
4726 and corresponding effects."
4727 ;; command-line-args-left is what is left of the command line (startup.el)
4728 (defvar command-line-args-left) ;Avoid 'free variable' warning
4729 (if (not noninteractive)
4730 (error "batch-byte-recompile-directory is to be used only with -batch"))
4731 (or command-line-args-left
4732 (setq command-line-args-left '(".")))
4733 (while command-line-args-left
4734 (byte-recompile-directory (car command-line-args-left) arg)
4735 (setq command-line-args-left (cdr command-line-args-left)))
4738 ;;; Core compiler macros.
4740 (put 'featurep 'compiler-macro
4741 (lambda (form feature &rest _ignore)
4742 ;; Emacs-21's byte-code doesn't run under XEmacs or SXEmacs anyway, so
4743 ;; we can safely optimize away this test.
4744 (if (member feature '('xemacs 'sxemacs 'emacs))
4748 (provide 'byte-compile)
4752 ;;; report metering (see the hacks in bytecode.c)
4754 (defvar byte-code-meter)
4755 (defun byte-compile-report-ops ()
4756 (or (boundp 'byte-metering-on)
4757 (error "You must build Emacs with -DBYTE_CODE_METER to use this"))
4758 (with-output-to-temp-buffer "*Meter*"
4759 (set-buffer "*Meter*")
4760 (let ((i 0) n op off)
4762 (setq n (aref (aref byte-code-meter 0) i)
4764 (if t ;(not (zerop n))
4768 (cond ((< op byte-nth)
4769 (setq off (logand op 7))
4770 (setq op (logand op 248)))
4771 ((>= op byte-constant)
4772 (setq off (- op byte-constant)
4774 (setq op (aref byte-code-vector op))
4775 (insert (format "%-4d" i))
4776 (insert (symbol-name op))
4777 (if off (insert " [" (int-to-string off) "]"))
4779 (insert (int-to-string n) "\n")))
4782 ;; To avoid "lisp nesting exceeds max-lisp-eval-depth" when bytecomp compiles
4783 ;; itself, compile some of its most used recursive functions (at load time).
4786 (or (byte-code-function-p (symbol-function 'byte-compile-form))
4787 (assq 'byte-code (symbol-function 'byte-compile-form))
4788 (let ((byte-optimize nil) ; do it fast
4789 (byte-compile-warnings nil))
4791 (or noninteractive (message "compiling %s..." x))
4793 (or noninteractive (message "compiling %s...done" x)))
4794 '(byte-compile-normal-call
4797 ;; Inserted some more than necessary, to speed it up.
4798 byte-compile-top-level
4799 byte-compile-out-toplevel
4800 byte-compile-constant
4801 byte-compile-variable-ref))))
4804 (run-hooks 'bytecomp-load-hook)
4806 ;;; bytecomp.el ends here