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[smlnj] Annotation of /sml/trunk/HISTORY
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Annotation of /sml/trunk/HISTORY

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1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 : mblume 1615 Name:
11 : mblume 1480 Date: yyyy/mm/dd
12 :     Tag: <post-commit CVS tag>
13 :     Description:
14 :    
15 :     ----------------------------------------------------------------------
16 : mblume 1622 Name: Matthias Blume (blume (at) tti - c (dot) org)
17 : mblume 1638 Date: 2004/09/29 14:00:00 CDT
18 :     Tag: blume-20040929-autoversion
19 :     Description:
20 :    
21 :     Implemented some CM magic to have
22 :     file src/compiler/TopLevel/main/version.sml
23 :     generated automagically.
24 :     The version is taken from two files: config/version and config/release.
25 :     The first is expected to contain a two-part version number such as 110.49.
26 :     The second should contain a single number, but it may be missing.
27 :    
28 :     If the environment variable VERSIONTOOL_BUMP_RELEASE is defined at the
29 :     time the version tool is loaded (which is the first time you say CMB.make),
30 :     then the tool will increment the value stored in config/release every
31 :     time CMB.make is invoked.
32 :    
33 :     The binfile format is now insensitive to anything beyond the first
34 :     two components of a version number, so bumping the release does not render
35 :     binfiles incompatible. Auto-bumping can be used to keep track of versions
36 :     during development without invalidating existing binfiles.
37 :    
38 :     In any case, every CMB.make updates the date information in version.sml.
39 :     (This is the date that is printed in the banner.)
40 :    
41 :     ----------------------------------------------------------------------
42 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
43 : mblume 1634 Date: 2004/09/28 10:53:00 CDT
44 :     Tag: blume-20040928-controls
45 :     Description:
46 :    
47 :     Some cleanup of the controls code.
48 :    
49 :     ----------------------------------------------------------------------
50 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
51 : mblume 1633 Date: 2004/09/27 22:08:00 CDT
52 :     Tag: blume-20040927-controls
53 :     Description:
54 :    
55 :     Added two pieces of functionality to the Controls interface:
56 :    
57 :     1. val save'restore: 'a control -> unit -> unit
58 :    
59 :     grabs the current value of the control in stage 1 and restores it
60 :     in stage 2.
61 :    
62 :     2. val set' : 'a control * 'a -> unit -> unit
63 :    
64 :     stores the given value into the control in stage 2 (i.e., delayed)
65 :     but does all error checking in stage 1.
66 :     (This is for string controls that need to do parse their argument --
67 :     something that might fail. In some cases, notably in CM, one
68 :     already knows the intended argument but wants to delay the actual
69 :     assignment until a time when error recovery would be more difficult.)
70 :    
71 :     Changed the handling of controls in tool arguments to classes "sml" and
72 :     "lazysml":
73 :     - use Controls.save'restore as a more robust way of restoring the
74 :     old value (in particular: without having to re-parse the string)
75 :     - use controls to handle the "overload" keyword in the init group
76 :     (I believe this change actually fixes a long-standing obscure bug.)
77 :    
78 :     ----------------------------------------------------------------------
79 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
80 : mblume 1632 Date: 2004/09/27 17:00:00 CDT
81 :     Tag: blume-20040927-lazysml
82 :     Description:
83 :    
84 :     Added a new tool class called "lazysml" to CM's tool chest. The only
85 :     difference to "sml" is that compilation is done with Control.lazysml
86 :     set to true. A source of class "lazysml" is automatically recognized
87 :     by a file name suffix of ".lml".
88 :    
89 :     In addition to the above feature, the original class "sml" now also
90 :     supports a tool argument "lazy" which has the same effect. As a
91 :     result, the following three lines are equivalent:
92 :    
93 :     foo.sml : lazysml
94 :     foo.sml : sml (lazy)
95 :     foo.sml (lazy)
96 :    
97 :     The setting goes into effect both during parsing and during
98 :     compilation. The original setting is restored right after parsing and
99 :     after compilation, respectively.
100 :    
101 :     In addition to all the above, there is also a general mechanism to set
102 :     ANY of the "controls" that are available at the command line via
103 :     "-C..." on a per-sml-file basis. The same rules that apply for "lazy"
104 :     apply as well. (In fact, "lazy" is implemented as a special case of
105 :     the general mechanism.)
106 :    
107 :     The .cm file syntax uses a new keyword tool argument called "with".
108 :     There are several ways of indicating the desired settings:
109 :    
110 :     foo.sml (with:parser.quotations=true)
111 :     foo.sml (with:(name:parser.quotations value:true))
112 :     foo.sml (with:(name:name1 value:value1 name:name2 value:value2 ...))
113 :     foo.sml (with:(name1=value1 name2=value2 ...))
114 :     foo.sml (with:(name1=value1 name:name2 value:value2 name3=value3 ...))
115 :    
116 :     etc.
117 :    
118 :     Another possible abbreviation is to leave out the =v or value:v part
119 :     if the name refers to a boolean control (in which case the value is
120 :     taken to be true). Thus, one could get lazy sml also by saying:
121 :    
122 :     foo.sml (with:parser.lazy-keyword=true)
123 :     foo.sml (with:parser.lazy-keyword)
124 :     foo.sml (with:(name:parser.lazy-keyword value:true))
125 :     foo.sml (with:(name:parser.lazy-keyword))
126 :    
127 :     ----------------------------------------------------------------------
128 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
129 : mblume 1631 Date: 2004/09/24 16:22:00 CDT
130 :     Tag: blume-20040924-ppc-long-branch
131 :     Description:
132 :    
133 :     Turned message about "emiting long form of branch" off by default.
134 :     Added a control flag to turn it back on when desired.
135 :    
136 :     ----------------------------------------------------------------------
137 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
138 : mblume 1630 Date: 2004/09/24 16:05:00 CDT
139 :     Tag: blume-20040924-rounding
140 :     Description:
141 :    
142 :     Applied patch for setting rounding modes under Mac OS X. Thanks to
143 :     Melissa O'Neill for providing the code!
144 :    
145 :     ----------------------------------------------------------------------
146 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
147 : mblume 1629 Date: 2004/09/23 17:30:00 CDT
148 :     Tag: blume-20040923-envvars
149 :     Description:
150 :    
151 :     1. Changed definition of type ControlRegistry.registry_tree to
152 :     include control_info (i.e., the name of the controlling environment
153 :     variable).
154 :    
155 :     2. Added command-line flags -e and -E to print the names of environment
156 :     variables that can be used to control internal settings.
157 :     (This uses the new API mentioned in 1.)
158 :    
159 :     ----------------------------------------------------------------------
160 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
161 : mblume 1622 Date: 2004/09/13 16:50:00 CDT
162 :     Tag: Release_110_49
163 :     Description:
164 :    
165 :     New working version (110.49). NEW BOOTFILES!
166 :    
167 :     ----------------------------------------------------------------------
168 : mblume 1621 Name: Matthias Blume
169 :     Date: 2004/09/13 16:20:00 CDT
170 :     Tag: blume-20040913-config-mlrisc
171 :     Description:
172 :    
173 :     Put target "mlrisc" back into the default list.
174 :     (There is no harm in having it, and some users have expressed their
175 :     wish to have "mlrisc" included by default.)
176 :    
177 :     ----------------------------------------------------------------------
178 : jhr 1620 Name: John Reppy
179 :     Date: 2004/09/13
180 :     Tag: jhr-20040913-signals
181 :     Description:
182 :    
183 :     Fixed the signal masking code to properly nest mask/unmask operations
184 :     on a per-signal basis.
185 :    
186 :     ----------------------------------------------------------------------
187 : mblume 1619 Name: Matthias Blume (blume (at) tti - c (dot) org)
188 :     Date: 2004/09/08 13:20:00 CDT
189 :     Tag: blume-20040908-heap-magic
190 :     Description:
191 :    
192 :     Bumped the heap macig number to 0x09082004 to account for the changed
193 :     layout of the ML frame under MacOS X.
194 :    
195 :     ----------------------------------------------------------------------
196 : allenleung 1618 Name: Allen Leung (leunga (at) reservoir (dot) com)
197 :     Date: 2004/09/03 11:26:00 EST
198 :     Tag: leunga-20040903-cygwin-install
199 :     Description:
200 :    
201 :     Added a patch to _arch-n-opsys to enable the Cygwin runtime.
202 :     The Cygwin runtime is turned on by setting the environment
203 :     variable SMLNJ_CYGWIN_RUNTIME to 1.
204 :    
205 :     ----------------------------------------------------------------------
206 : mblume 1615 Name: Matthias Blume (blume (at) tti - c (dot) org)
207 : mblume 1617 Date: 2004/08/31 17:15:00 CDT
208 :     Tag: blume-20040831-core
209 :     Description:
210 :    
211 :     Added some exports to src/compiler/core.cm upon request by J. Joemann.
212 :    
213 :     ----------------------------------------------------------------------
214 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
215 : mblume 1616 Date: 2004/08/30 17:55:00 CDT
216 :     Tag: blume-20040830-installer
217 :     Description:
218 :    
219 :     Upon request by Johannes Joemann:
220 :    
221 :     - improved ML code of installer to fall back to coping when renaming
222 :     fails (i.e., when source and target are on different file systems);
223 :     the code compiles but has yet to be tested in anger
224 :     - removed mlrisc from list of default targets (config/targets)
225 :    
226 :     ----------------------------------------------------------------------
227 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
228 : mblume 1615 Date: 2004/08/27 17:20:00 CDT
229 :     Tag: blume-20040827-ptreql
230 :     Description:
231 :    
232 :     Added ptreql primop to structure InlineT (upon request from Larry
233 :     Paulson).
234 :    
235 :     ----------------------------------------------------------------------
236 : allenleung 1613 Name: Allen Leung (leunga (at) reservoir (dot) com)
237 : allenleung 1614 Date: 2004/08/15 21:21:00 EST
238 :     Tag: leunga-110_48-udgraph
239 :     Description:
240 :    
241 :     Another bug fix from Carl Hauser:
242 :    
243 :     diff /net/niflab/smlnj48/src/MLRISC/graphs/udgraph.sml udgraph.sml
244 :     > 48c48
245 :     > < | rmv((e as (k,_))::es,L) = rmv(es,if k = i then es else
246 :     > e::L)
247 :     > ---
248 :     > > | rmv((e as (k,_))::es,L) = rmv(es,if k = i then L else e::L)
249 :     > Without this, any deletion of an edge in an undirected graph does severe
250 :     > violence to the graph.
251 :    
252 :     ----------------------------------------------------------------------
253 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
254 : allenleung 1613 Date: 2004/08/10 23:35:00 EST
255 :     Tag: leunga-110_48-ppc
256 :     Description:
257 :    
258 :     The IBM/MacOS syntax switch on PPC was incorrectly swapped.
259 :    
260 :     ----------------------------------------------------------------------
261 : mblume 1602 Name: Matthias Blume (blume (at) tti - c (dot) org)
262 : mblume 1615 Date: 2004/08/10 12:00:00 CDT
263 : mblume 1602 Tag: Release_110_48
264 :     Description:
265 :    
266 :     New working version (110.48). NEW BOOTFILES!
267 :    
268 :     ----------------------------------------------------------------------
269 : allenleung 1599 Name: Allen Leung (leunga (at) reservoir (dot) com)
270 :     Date: 2004/08/09 12:21:00 EST
271 :     Tag: leunga-110_47-dijsktra
272 :     Description:
273 :    
274 :     Bug fix from Carl Hauser:
275 :    
276 :     single_source_shortest_paths in dijkstra.sml was observed to get wrong
277 :     answers (by comparing to single_source_shortest_paths in bellman-ford.sml).
278 :    
279 :     The problem is that following the expression A.update(dist,s,Num.zero)
280 :     it is necessary to update the priority queue using Q.decreaseWeight(Q,s).
281 :    
282 :     ----------------------------------------------------------------------
283 : mblume 1595 Name: Matthias Blume (blume (at) tti - c (dot) org)
284 :     Date: 2004/08/06 18:10:00 CDT
285 :     Tag: blume-20040806-cmdline
286 :     Description:
287 :    
288 :     Fiddled with handling of command-line options:
289 :    
290 :     * sml now quits after processing the command line
291 :     if -H, -S, -h<n>, or -s<n> appears as the last
292 :     command-line argument
293 :     * a new option -q terminates the session when encountered on
294 :     the command line; subsequent arguments will be ignored
295 :     * bug fixes: short (erroneous) arguments are no longer ignored
296 :     completely
297 :    
298 :     ----------------------------------------------------------------------
299 : allenleung 1593 Name: Allen Leung (leunga (at) reservoir (dot) com)
300 :     Date: 2004/08/04 18:17:00 EST
301 :     Tag: leunga-110_47-ppc-ibm-asm
302 :     Description:
303 :    
304 :     - Added minimal IBM assembly syntax support for PowerPC.
305 :    
306 :     - Cygwin: manually changed the file cygwin.def. Some exported symbols have
307 :     been altered in the runtime. We need an automatic way to keep the file
308 :     in sync.
309 :    
310 :     ----------------------------------------------------------------------
311 : mblume 1548 Name: Matthias Blume (blume (at) tti - c (dot) org)
312 : mblume 1581 Date: 2004/08/04 14:00:00 CDT
313 :     Tag: Release_110_47
314 :     Description:
315 :    
316 :     New working version (110.47). NEW BOOTFILES!
317 :    
318 :     ----------------------------------------------------------------------
319 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
320 : mblume 1580 Date: 2004/08/03 14:25:00 CDT
321 :     Tag: blume-20040803-callingconv
322 :     Description:
323 :    
324 :     Added low-level support for choosing C calling conventions by
325 :     twiddling the type of rawccall. (See
326 :     src/compiler/Semant/types/cproto.sml for details.)
327 :    
328 :     ----------------------------------------------------------------------
329 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
330 : mblume 1579 Date: 2004/08/02 15:55:00 CDT
331 :     Tag: blume-20040802-backout
332 :     Description:
333 :    
334 :     Backed out of change to win32-filesys.c. The earlier patch to
335 :     get_file_time caused CM to produce files with the wrong time stamp.
336 :    
337 :     ----------------------------------------------------------------------
338 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
339 : mblume 1573 Date: 2004/08/02 14:45:00 CDT
340 :     Tag: blume-20040802-nlffi-win32
341 :     Description:
342 :    
343 :     Added NLFFI support for Win32, adapted from a patch provided by David
344 :     Hansel. This is currently completely untested. Also, the issue
345 :     concerning stdcall vs. ccall is still unresolved.
346 :    
347 :     ----------------------------------------------------------------------
348 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
349 : mblume 1572 Date: 2004/07/30 17:55:00 CDT
350 :     Tag: blume-20040730-various
351 :     Description:
352 :    
353 :     Gearing up towards 110.47...
354 :    
355 :     - various minor bugfixes to ml-nlffigen
356 :     - a beginning of a manual for nlffi
357 :    
358 :     - eliminated 'export name=value' in config/install.sh as this does
359 :     not work with certain versions of /bin/sh
360 :     (Thanks to David King at Motorola for catching this.)
361 :    
362 :     - several bugfixes provided or suggested by David Hansel at Reactive Systems:
363 :     - added a test for tm==NULL to gmtime.c and localtime.c
364 :     - applied patch for incorrect GetFileTime under win32
365 :     - toSeconds -> toMilliseconds in Win32/win32-process.sml
366 :    
367 :     ----------------------------------------------------------------------
368 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
369 : mblume 1557 Date: 2004/07/21 18:20:00 CDT
370 :     Tag: blume-20040721-nlffigen
371 :     Description:
372 :    
373 :     - Fixed minor issue in ml-nlffigen: Now generate structure T_foo
374 :     for a typedef to an incomplete type, but leave out the "typ" member.
375 :     (This is just for consistency.)
376 :     - Started to produce what is supposed to become better (i.e., comprehensive)
377 :     documentation of what ml-nlffigen does and produces.
378 :    
379 :     ----------------------------------------------------------------------
380 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
381 : mblume 1548 Date: 2004/07/14 16:25:00 CDT
382 :     Tag: blume-20040714-union
383 :     Description:
384 :    
385 :     Added C_UNION to c-calls/c-types.sml and updated the machinery
386 :     (ml-nlffigen, cproto.sml) that conveys C function interface
387 :     information to the code generator.
388 :    
389 :     However, the actual architecture-specific implementation of function
390 :     arguments and results that are C unions is still not implemented.
391 :    
392 :     ----------------------------------------------------------------------
393 : allenleung 1539 Name: Allen Leung (leunga (at) reservoir (dot) com)
394 : allenleung 1546 Date: 2004/07/14 14:38:00 EST
395 :     Tag: leunga-110_46_1-ppc-lwzu
396 :     Description:
397 :    
398 :     Added these instructions to the PowerPC architecture:
399 :     LBZU(X), LHZU(X), LWZU(X),
400 :     STWU(X), STFDU, STFSU
401 :    
402 :     etc...
403 :    
404 :     Note: I haven't added their instruction encoding into the description.
405 :    
406 :     ----------------------------------------------------------------------
407 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
408 : allenleung 1539 Date: 2004/07/13 15:04:00 EST
409 :     Tag: leunga-110_46_1-ppc-lwarx
410 :     Description:
411 :    
412 :     Added the two instructions LWARX and STWCX to the PowerPC
413 :     instruction set.
414 :    
415 :     A (untested) rewrite of loop-structure.sml. The old version
416 :     is completely broken.
417 :    
418 :     ----------------------------------------------------------------------
419 : mblume 1479 Name: Matthias Blume (blume (at) tti - c (dot) org)
420 : mblume 1537 Date: 2004/07/13 13:50:00 CDT
421 :     Tag: blume-20040713-nlffi
422 :     Description:
423 :    
424 :     - use paramAlloc to report c-calls with too many arguments
425 :     (for PPC version where parameter area is pre-allocated)
426 :     - added ccall_maxargspace to machspec (to implement the above)
427 :     - made "make" commend in CM's "make" tool configurable
428 :     - added option (default: on) for passing the name of the SML/NJ's "bin"
429 :     directory to "make"; the call looks like this:
430 :    
431 :     make <options> SMLNJ_BINDIR=<dir> <target>
432 :    
433 :     This can be used by the Makefile to, e.g., pick the "right" version
434 :     of ml-nlffigen.
435 :     - minor code tweaks
436 :    
437 :     ----------------------------------------------------------------------
438 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
439 : mblume 1532 Date: 2004/07/12 22:50:00 CDT
440 :     Tag: blume-110_46_1-macosx-nlffi
441 :     Description:
442 :    
443 :     NLFFI under Mac OS X now working (sort of). This is largely untested,
444 :     though.
445 :    
446 :     Note: 1. You have to make a new, clean build of the runtime system.
447 :     2. There are new BOOTFILES, you have to use them!
448 :     (Doing the bootstrap process yourself would be *very* painful!
449 :     If you absolutely have to do it, build the system under
450 :     a different architecture and then cross-compile.)
451 :    
452 :     Version bumped to 110.46.1 to account for runtime data format changes.
453 :    
454 :     ----------------------------------------------------------------------
455 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
456 : mblume 1515 Date: 2004/06/18 14:30:00 CDT
457 :     Tag: blume-20040618-unix
458 :     Description:
459 :    
460 :     Changed the implementation of structure Unix so that the same stream
461 :     is returned every time one of the {text,bin}{In,Out}streamOf functions
462 :     is invoked on the same proc. This is not what the spec currently
463 :     says -- although IMO it arguably should. (See discussion below.)
464 :    
465 :     ----------------------------------------------------------------------
466 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
467 : mblume 1507 Date: 2004/06/17 18:15:00 CDT
468 :     Tag: Release_110_46
469 :     Description:
470 :    
471 :     New working version (110.46). NEW BOOTFILES!
472 :    
473 :     ----------------------------------------------------------------------
474 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
475 : mblume 1506 Date: 2004/06/17 17:20:00 CDT
476 :     Tag: blume-20040617-timer-unix
477 :     Description:
478 :    
479 :     Changed the interface of structures Timer and Unix to match the most
480 :     recent Basis spec.
481 :    
482 :     In the case of Unix there still seems to be an open/weird issue:
483 :    
484 :     The {text,bin}{In,Out}streamOf functions are supposed to create
485 :     fresh streams whenever they are called -- as opposed to have them
486 :     return the same stream every time. This design is supposed to
487 :     prevent space leaks caused by proc values hanging on to streams.
488 :    
489 :     The reap function, on the other hand, is supposed to close the
490 :     streams. This cannot be done without having a handle on the
491 :     stream in proc after all...
492 :    
493 :     I took the liberty to implement the following stopgap solution:
494 :    
495 :     The proc value hangs on to the most recently created stream(s).
496 :     Reap closes those. If either or both of the two streams hadn't
497 :     been created at all yet, then reap will close the corresponding
498 :     file descriptors directly.
499 :    
500 :     PS: I don't understand the original space leak argument anymore. If
501 :     a proc hangs on to the imperative stream, then I/O operations on those
502 :     will advance the state of the cached stream and avoid the space leak.
503 :    
504 :     ----------------------------------------------------------------------
505 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
506 : mblume 1500 Date: 2004/05/28 16:45:00 CDT
507 :     Tag: blume-20040528-basis
508 :     Description:
509 :    
510 :     Added signature PACK_REAL and exported functor PrimIO.
511 :    
512 :     ----------------------------------------------------------------------
513 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
514 : mblume 1498 Date: 2004/05/25 16:00:00 CDT
515 :     Tag: blume-20040525-group-owner
516 :     Description:
517 :    
518 :     CM now ignores (but still accepts) the "owner" information in group
519 :     descriptions. The owner of a group is its next enclosing
520 :     library. Each group must have a unique owner. (There is a virtual
521 : mblume 1505 "toplevel" library that owns groups which are not nested within a real
522 : mblume 1498 library.) Previously, each group had to explicitly declare its owner,
523 :     and CM would check that such a declaration is correct. The new scheme
524 :     is to have CM check that for each group there is precisely one owning
525 :     library.
526 :    
527 :     The advantage of the new scheme is that the programmer no longer needs
528 :     to maintain the somewhat annoying owner information. The downside is
529 :     that CM cannot enforce the ownership rule across multiple runs of
530 :     CM.make. Fortunately, enclosing the same group in two different
531 :     libraries A and B which are not part of the same program does not
532 :     cause real problems.
533 :    
534 :     ----------------------------------------------------------------------
535 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
536 : mblume 1496 Date: 2004/05/20 16:00:00 CDT
537 :     Tag: blume-20040520-win32
538 :     Description:
539 :    
540 :     Made the win32 version work again. (Strangely, a misplaced comma had
541 :     slipped into win32-process.c which prevented the runtime from being
542 :     compiled correctly.)
543 :    
544 :     Also, included a minor addition to ml-build.bat analogous to what was
545 :     done in blume-20040519-ml-build.
546 :    
547 :     ----------------------------------------------------------------------
548 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
549 : mblume 1494 Date: 2004/05/19 22:10:00 CDT
550 :     Tag: blume-20040519-ml-build
551 :     Description:
552 :    
553 :     Arranged for ml-build to clean up after itself a little bit better.
554 :     The script generates a temporary SML source file and compiles it using
555 :     CM, so CM generates metadata (GUID, SKEL, objectfile) for it. It now
556 :     gets rid of those at the end, so they don't accumulate under .cm.
557 :    
558 :     This required a minor change to install.sh because the name of the
559 :     metadata directory (default: .cm) is actually configurable at
560 :     installation time.
561 :    
562 :     ----------------------------------------------------------------------
563 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
564 : mblume 1491 Date: 2004/05/18 15:50:00 CDT
565 :     Tag: blume-20040518-mkreader
566 :     Description:
567 :    
568 :     Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
569 :     implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
570 :    
571 :     ----------------------------------------------------------------------
572 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
573 : mblume 1489 Date: 2004/05/11 14:35:00 CDT
574 :     Tag: blume-20040511-win32sock
575 :     Description:
576 :    
577 :     Added previously missing support for many socket-related functions
578 :     under win32. Thanks to David Hansel <hansel@reactive-systems.com>
579 :     for the voluminous patch!
580 :    
581 :     (I have not tested this patch under win32 yet.)
582 :    
583 : mblume 1490 Here is David's e-mail:
584 :    
585 :     Hi,
586 :    
587 :     Attached to this email you find a diff against sml/nj 110.45
588 :     that will enable socket support under Windows.
589 :    
590 :     To apply the patch (using unix or cygwin)
591 :     1) gunzip runtime.diff.gz
592 :     2) "cd" into "src/runtime" in the source tree of a fresh
593 :     110.45 installation.
594 :     3) patch -p 1 < [your/path/to]runtime.diff
595 :    
596 :     The code compiles fine but has NOT yet been extensively tested.
597 :     I only ran a few tests for basic socket client functionality
598 :     (which worked fine). Especially the functions that use ioctl
599 :     are not tested at all and might not work (see below).
600 :    
601 :     I implemented this since we want to move to a newer version of sml/nj
602 :     but need socket support in order to use it. This is the first time I
603 :     even had a look at the sml/nj source, so please review my changes
604 :     before making this part of the distribution! Here are a few issues
605 :     that I think might be better for someone to solve who is more
606 :     familiar with the sml/nj source (and socket programming):
607 :    
608 :     - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
609 :     exception since I could not figure out what the windows equivalent
610 :     of these functions is
611 :    
612 :     - In sockets-osdep.h there are a some #include statements that are
613 :     only used in a few files that include sockets-osdep.h
614 :    
615 :     - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
616 :     does not process its return value since I don't know how to
617 :     report an error upwards.
618 :    
619 :     - It would probably be good to have a call to WSACleanup() when
620 :     the library is unloaded (if there is such a possibility).
621 :     Otherwise I think Windows will take care of this automatically
622 :     when the process finishes.
623 :    
624 :     - I used ioctlsocket() as a replacement for ioctl() but I have
625 :     no idea if that is actually the proper replacement on Windows.
626 :    
627 :     - All these issues are marked in the code by "FIXME" comments.
628 :    
629 :     We use sml/nj extensively in our products and are quite happy
630 :     with it. I hope this contribution will help you.
631 :    
632 :     Keep up the good work!
633 :    
634 :     David
635 :    
636 : mblume 1489 ----------------------------------------------------------------------
637 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
638 : mblume 1488 Date: 2004/05/11 14:20:00 CDT
639 :     Tag: blume-20040511-installml
640 :     Description:
641 :    
642 :     Fixed two bugs in installml script. (Thanks to Vesa A. Norrman for
643 :     the patch.)
644 :    
645 :     ----------------------------------------------------------------------
646 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
647 : mblume 1487 Date: 2004/05/11 14:05:00 CDT
648 :     Tag: blume-20040511-nlffi-netbsd
649 :     Description:
650 :    
651 :     Added support for nlffi under netbsd. (Thanks to Vesa A. Norrman for
652 :     the patch.)
653 :    
654 :     ----------------------------------------------------------------------
655 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
656 : mblume 1486 Date: 2004/05/11 12:05:00 CDT
657 :     Tag: blume-20040511-exports
658 :     Description:
659 :    
660 :     As per request by Adam Chlipala <adam@hcoop.net>, extended various
661 :     export lists in compiler-related .cm-files.
662 :    
663 :     ----------------------------------------------------------------------
664 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
665 : mblume 1485 Date: 2004/05/11 11:35:00 CDT
666 :     Tag: blume-20040511-allsource
667 :     Description:
668 :    
669 :     The installer now honors the "src-smlnj" target again, although its meaning
670 :     has changed from "all sources required for the compiler" to "all sources
671 :     the installer knows about". In other words, if you enable "src-smlnj"
672 :     in the "targets" file, then the installer will pull in sources for
673 :     everything. (Notice that this refers to source code only. Compiled
674 :     code is still only installed for modules that were requested explicitly
675 :     or which are required for other modules that were requested explicitly.)
676 :    
677 :     ----------------------------------------------------------------------
678 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
679 : mblume 1482 Date: 2004/04/23 17:40:00 CDT
680 :     Tag: blume-20040423-ieee-scan
681 :     Description:
682 :    
683 :     Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
684 :     in the exponent calculation we get INF or ZERO (depending on the mantissa
685 :     and the sign of the exponent).
686 :    
687 :     ----------------------------------------------------------------------
688 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
689 : mblume 1480 Date: 2004/04/23 10:40:00 CDT
690 :     Tag: blume-20040423-ml-build
691 :     Description:
692 :    
693 :     The ml-build script now terminates with a non-0 status when something
694 :     goes wrong.
695 :    
696 :     ----------------------------------------------------------------------
697 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
698 : mblume 1479 Date: 2004/04/22 16:35:00 CDT
699 :     Tag: blume-20040422-Option
700 :     Description:
701 :    
702 :     Made exception Option to be the same as exception Option.Option
703 :     (as it should be).
704 :    
705 :     ----------------------------------------------------------------------
706 : allenleung 1468 Name: Allen Leung (leunga (at) reservoir (dot) com)
707 :     Date: 2004/03/19 14:40:00 EST
708 :     Tag: leunga-20040319-cygwin-nlffi
709 :     Description:
710 :    
711 :     Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
712 :     of SML/NJ. The problem is that
713 :    
714 :     lib = dlopen(NULL, ...)
715 :     f = dlsym(lib, "malloc");
716 :    
717 :     does not work on Windows unless we explicitly export symbols
718 :     such as 'malloc' during linking. We fixed this by explicitly
719 :     exporting the required symbols with the magic gcc incantation:
720 :    
721 :     -Wl,--export-all cygwin.def
722 :    
723 :     where cygwin.def is a file containing all the symbols that
724 :     we wish to export.
725 :    
726 :     I suspect this is a Windows problem and we'll have to
727 :     do the same (somehow with windows compilers) when
728 :     we build the native win32 version with the system
729 :     calls LoadLibrary/GetProcAddress.
730 :    
731 :     ----------------------------------------------------------------------
732 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
733 : mblume 1465 Date: 2004/03/04 16:35:00 CST
734 :     Tag: blume-20040304-intinf-fmt
735 :     Description:
736 :    
737 :     Fixed problem with IntInf.fmt (sign would show up on the right instead
738 :     of on the left for BIN, OCT, and HEX).
739 :    
740 :     ----------------------------------------------------------------------
741 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
742 : mblume 1464 Date: 2004/03/04 11:25:00 CST
743 :     Tag: blume-20040304-symlinks
744 :     Description:
745 :    
746 :     Fixed problem with installer script (unix only) where bin/ml-yacc and
747 :     friends pointed (via symlinks) to absolute locations instead of just
748 :     .run-sml. This was reported by Vesa A Norrman.
749 :    
750 :     ----------------------------------------------------------------------
751 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
752 : mblume 1455 Date: 2004/02/13 14:50:00 CST
753 :     Tag: Release_110_45
754 :     Description:
755 :    
756 :     New working version (110.45). New bootfiles.
757 :    
758 :     ----------------------------------------------------------------------
759 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
760 : mblume 1448 Date: 2004/01/26 15:15:15 CST
761 :     Tag: blume-20040126-toplevel
762 :     Description:
763 :    
764 :     Improved handling of exceptions at the interactive toplevel.
765 :    
766 :     ----------------------------------------------------------------------
767 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
768 :     Date: 2004/01/26 11:25:00
769 : mblume 1446 Tag: blume-20040126-app
770 :     Description:
771 :    
772 :     Type of top-level "app" corrected.
773 : mblume 1447 Added code for setting vp_limitPtrMask to Win32-specific runtime.
774 : mblume 1446
775 :     ----------------------------------------------------------------------
776 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
777 : mblume 1427 Date: 2003/11/18 17:10 CST
778 :     Tag: blume-20031118-basis-fiddle
779 :     Description:
780 :    
781 :     - changed Timer interface to what might become the spec
782 :     - POSIX_FLAGS -> BIT_FLAGS according to spec
783 :     - some other minor discrepancies wrt. spec eliminated
784 :    
785 :     ----------------------------------------------------------------------
786 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
787 : mblume 1414 Date: 2003/11/06 12:00:00 CST
788 :     Tag: Release_110_44
789 :     Description:
790 :    
791 :     New working version (110.44). New bootfiles.
792 :    
793 :     ----------------------------------------------------------------------
794 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
795 : mblume 1411 Date: 2003/11/04 11:50:00 CST
796 :     Tag: blume-20031104-move-libraries
797 :     Description:
798 :    
799 :     Eliminated the "dont_move_libraries" directive in config/targets.
800 :     (The mechanism was broken and could not be fixed easily. Moreover,
801 :     there does not seem to be any reason not to move all libraries into
802 :     lib during installation. I originally implemented this directive as a
803 :     backward-compatibility feature when I first introduced the new CM.
804 :     Now that things have been stable for a long time and going back to the
805 :     old CM is not an option, there is no reason to keep it around.)
806 :    
807 :     ----------------------------------------------------------------------
808 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
809 : mblume 1409 Date: 2003/11/03 16:00:00 CST
810 :     Tag: blume-20031103-installdir
811 :     Description:
812 :    
813 :     Made installer honor INSTALLDIR variable again. (Thanks to Chris
814 :     Richards for pointing out the problem and providing the solution.)
815 :    
816 :     ----------------------------------------------------------------------
817 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
818 : mblume 1400 Date: 2003/10/01 17:05:00 CDT
819 :     Tag: blume-20031001-lal-mlrisc
820 :     Description:
821 :    
822 :     MLRISC bug fix from Lal.
823 :    
824 :     ----------------------------------------------------------------------
825 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
826 : mblume 1399 Date: 2003/09/30 16:10:00 CDT
827 :     Tag: blume-20030930-primio-bat
828 : mblume 1398 Description:
829 :    
830 :     1. Added openVector, nullRd, and nullWr to PRIM_IO.
831 :     2. Improved .bat files (for Win32 port) to make things work under Win95.
832 :     (thanks to Aaron S. Hawley for this one)
833 :    
834 :     ----------------------------------------------------------------------
835 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
836 : mblume 1395 Date: 2003/09/26 16:05:00 CDT
837 :     Tag: blume-20030926-wrappriv
838 :     Description:
839 :    
840 :     Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
841 :    
842 :     ----------------------------------------------------------------------
843 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
844 : mblume 1394 Date: 2003/09/26 15:00:00 CDT
845 :     Tag: blume-20030926-110_43_3
846 :     Description:
847 :    
848 :     - additional cleanup
849 :     - version number bump, NEW BOOTFILES
850 :    
851 :     ----------------------------------------------------------------------
852 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
853 : mblume 1393 Date: 2003/09/26 12:00:00 CDT
854 :     Tag: blume-20030926-ppautoload
855 :     Description:
856 :    
857 :     I modified the read-eval-print loop so that the autoloader gets
858 :     invoked whenever the prettyprinter tries to look up a symbol that
859 :     is not currently defined in the toplevel environment but which
860 :     appears in CM's autoload registry. As a result, we see far fewer of
861 :     those ?.Foo.Bar.xxx names in the prettyprinter's output.
862 :    
863 :     In addition to this I tried to clean up some pieces of the Basis
864 :     implementation (e.g., Socket, Word8Array) in order to prevent other
865 :     instances of these ?.Foo.Bar.xxx names from being printed.
866 :    
867 :     The mechanism that picks names for types still needs some work, though.
868 :     (Right now it seems that if there is a type A.t which is defined to
869 : mblume 1394 be B.u, but B is unavailable at toplevel, then A.t gets printed as
870 :     "?.B.u" although the perhaps more sensible solution would be to use
871 : mblume 1393 "A.t" in this case. In other words, the prettyprinter should follow
872 :     a chain of DEFtycs not farther than there are corresponding toplevel
873 :     names in the current environment.)
874 :    
875 :     ----------------------------------------------------------------------
876 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
877 : mblume 1391 Date: 2003/09/24 16:31:00 CDT
878 :     Tag: blume-20030924-installer
879 :     Description:
880 :    
881 :     Another installer tweak: All the ML code for the installer is now
882 :     compiled during CMB.make and put into a little library called
883 :     $smlnj/installer.cm. The installation then simply invokes
884 :    
885 :     sml -m $smlnj/installer.cm
886 :    
887 :     and everything happens automagically.
888 :    
889 :     Win32: ML code senses value of environment variable SMLNJ_HOME.
890 :     Unix: ML code senses values of environment variables ROOT, CONFIGDIR,
891 :     and BINDIR.
892 :    
893 :     The new scheme guarantees that the ML code responsible for the installation
894 :     is in sync with the APIs of the main system. Also, the installer is
895 :     somewhat faster because the installer script is precompiled.
896 :    
897 :     ----------------------------------------------------------------------
898 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
899 : mblume 1390 Date: 2003/09/24 15:35:00 CDT
900 :     Tag: blume-20030924-synsock
901 :     Description:
902 :    
903 :     Added a signature SYNCHRONOUS_SOCKET to basis.cm. This is like SOCKET
904 :     but excludes all non-blocking operations. Defined SOCKET (in Basis)
905 :     and CML_SOCKET in terms of SYNCHRONOUS_SOCKET. Removed superfluous
906 :     implementations of non-blocking operations from CML's Socket
907 :     structure.
908 :    
909 :     ----------------------------------------------------------------------
910 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
911 : mblume 1389 Date: 2003/09/24 15:10:05 CDT
912 :     Tag: blume-20030924-sockets
913 :     Description:
914 :    
915 :     1. Fixed SOCKET API and implementation to match Basis spec.
916 :     This required changing the internal representation of sockets to one
917 :     that remembers (for each socket file descriptor) whether it is currently
918 :     blocking or non-blocking. This state is maintained lazily (i.e., a system
919 :     call is made only if the state actually needs to change).
920 :    
921 :     2. OS-specific details of sockets were moved into separate files, thus
922 :     making it possible to unify the bulk of the socket implementations
923 :     between Unix and Win32.
924 :    
925 :     3. CML's socket API changed accordingly.
926 :     (Note that we need to remove non-blocking functions from this API
927 :     since they are redundant in the case of CML!)
928 :    
929 :     4. CML's socket implementation now makes use of non-blocking functions
930 :     provided by Basis, thus removing all OS-dependent code from this part
931 :     of CML.
932 :    
933 :     5. Changed Real64.precision from 52 to 53. Minor cleanup in Real64 code.
934 :    
935 :     ----------------------------------------------------------------------
936 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
937 : mblume 1387 Date: 2003/09/22 12:10:00 CDT
938 : mblume 1388 Tag: blume-20030922-110_43_2
939 : mblume 1387 Description:
940 :    
941 :     Made a new interim version and bootfiles for developer's bootstrapping
942 :     convenience.
943 :    
944 :     110.43.2 -- NEW BOOTFILES
945 :    
946 :     ----------------------------------------------------------------------
947 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
948 : mblume 1385 Date: 2003/09/19 15:55:00 CDT
949 :     Tag: blume-20030919-cmdir
950 :     Description:
951 :    
952 :     1. new-install.sh -> install.sh
953 :     2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
954 :     3. tweaked installer so that another name instead of .cm can be chosen
955 :     at install time (by setting the CM_DIR_ARC environment variable
956 :     during installation); once installation is complete, the name is
957 :     fixed
958 :    
959 :     ----------------------------------------------------------------------
960 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
961 : mblume 1384 Date: 2003/09/18 16:00:00 CDT
962 :     Tag: blume-20030918-110_43_1
963 :     Description:
964 :    
965 :     Made a new interim version and bootfiles for developer's bootstrapping
966 :     convenience.
967 :    
968 :     110.43.1 -- NEW BOOTFILES
969 :    
970 :     ----------------------------------------------------------------------
971 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
972 : mblume 1383 Date: 2003/09/18 15:20:00 CDT
973 :     Tag: blume-20030918-misc
974 :     Description:
975 :    
976 :     1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
977 :     this seems to be controversial at the moment) and used those in
978 :     Posix.ProcEnv.times.
979 :    
980 :     2. Added Time.{from,to}Nanoseconds to Time.
981 :    
982 :     3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
983 :     For example, fromLargeInt never needs to look at more than 3 "big
984 :     digits" to get its 53 bits of precision.
985 :    
986 :     ----------------------------------------------------------------------
987 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
988 : mblume 1381 Date: 2003/09/17 16:30:00 CDT
989 :     Tag: blume-20030917-real32-slices
990 :     Description:
991 :    
992 :     Added an entry to the primitive environment
993 :     (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
994 :     added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
995 :    
996 :     Removed some of the "magic" constants in real64.sml and replaced them
997 :     with code that generates these values from their corresponding
998 :     integer counterparts.
999 :    
1000 :     Made all(?) the slice-related changes to the Basis and made everything
1001 :     compile again...
1002 :    
1003 :     ----------------------------------------------------------------------
1004 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1005 : mblume 1375 Date: 2003/09/15 17:45:00 CDT
1006 :     Tag: blume-20030915-rbase
1007 :     Description:
1008 :    
1009 :     Fixed bug in Real.fromLargeInt.
1010 :    
1011 :     ----------------------------------------------------------------------
1012 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1013 : mblume 1369 Date: 2003/09/13 18:11:00 CDT
1014 :     Tag: blume-20030913-libinstall
1015 :     Description:
1016 :    
1017 :     Minor bugfix in config/libinstall (set anchor with path to
1018 :     standalone tool after installing it, otherwise libraries that
1019 :     need ml-lex or ml-yacc won't compile the first time the installer
1020 :     runs).
1021 :    
1022 :     ----------------------------------------------------------------------
1023 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1024 : mblume 1368 Date: 2003/09/12 11:45:00 CDT
1025 :     Tag: blume-20030912-various
1026 :     Description:
1027 :    
1028 :     - fixed bug in Real.toLargeInt
1029 :     - fixed bug in Posix.ProcEnv.times
1030 :     - changed inputLine functions to return an option
1031 :     - minor installer improvements / bugfixes
1032 :     - changed default @SMLalloc parameter for x86/celeron to 64k
1033 :    
1034 :     ----------------------------------------------------------------------
1035 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1036 : mblume 1356 Date: 2003/09/09 22:00:00 CDT
1037 :     Tag: Release_110_43
1038 :     Description:
1039 :    
1040 :     New working release 110.43. New bootfiles.
1041 :    
1042 :     ----------------------------------------------------------------------
1043 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1044 : mblume 1354 Date: 2003/09/09 19:20:00 CDT
1045 :     Tag: blume-20030909-installer
1046 :     Description:
1047 :    
1048 :     Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
1049 :     Modified config/install.bat to take advantage of it. Also modified
1050 :     config/install.sh (and called it config/new-install.sh) to take advantage
1051 :     of it on Unix systems. (The SML code is (supposed to be) platform-
1052 :     independent.)
1053 :    
1054 :     The installer can now install everything under Win32
1055 :     as well as under *nix as long as it compiles.
1056 :    
1057 :     Other changes:
1058 :    
1059 :     - made CML compile again under Win32
1060 :     - made eXene compile under Win32 (by providing a fake structure UnixSock
1061 :     and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
1062 :     - fixed a bug in nowhere: it assumed that type OS.Process.status is the
1063 :     same as type int; under Win32 it isn't
1064 :     - fixed some slice-related problems in the win32-specific parts of CML
1065 :     - added a functor argument "sameVol" to os-path-fn.sml in the Basis
1066 :     (under Win32, the volume name is case-insensitive, and the
1067 :     OS.Path code compares volume names for equality)
1068 :    
1069 :     ----------------------------------------------------------------------
1070 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1071 : mblume 1353 Date: 2003/09/08 11:55:00 CDT
1072 :     Tag: blume-20030908-fullpath
1073 :     Description:
1074 :    
1075 :     Made Win32 version of OS.FileSys.fullPath return current directory
1076 :     when given an empty string. This is what the spec says, and incidentally,
1077 :     CM depends on it. (CM otherwise goes into an infinite loop in certain
1078 :     cases when presented with the name of a non-existing .cm file.)
1079 :    
1080 :     ----------------------------------------------------------------------
1081 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1082 : mblume 1350 Date: 2003/09/04 16:30:00 CDT
1083 : mblume 1352 Tag: blume-20030905-slices-etc
1084 : mblume 1350 Description:
1085 :    
1086 :     1. Changed interface to vectors and arrays in Basis to match
1087 :     (draft) Basis spec.
1088 :     2. Added signatures and implementations of slices according to
1089 :     Basis spec.
1090 :     3. Edited source code throughout the system to make it compile again
1091 :     under 1. and 2. (In some cases code had to be added to have it
1092 :     match the new signatures.)
1093 :     4. MLRISC should be backward-compatible: the copies of the originals
1094 :     of files that needed to change under 3. were retained, the .cm files
1095 :     check the compiler version number and use old versions when
1096 :     appropriate.
1097 :     5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
1098 :     dirstream -> string option (in accordance with Basis spec).
1099 :     6. When generating code that counts lines, ml-lex used function
1100 :     CharVector.foldli, taking advantage of its old interface.
1101 :     This has been replaced with the corresponding code from
1102 :     CharVectorSlice. (html-lex must be re-lexed!)
1103 :     7. BitArray in smlnj-lib/Util has been extended/modified to match the
1104 :     new MONO_ARRAY signature. (Do we need BitArraySlice?)
1105 :     8. Removed temporary additions (fromInternal, toInternal) from the
1106 :     (now obsolete) IntInf in smlnj-lib/Util.
1107 :     9. Cleaned up structure Byte.
1108 :     10. Added localOffset, scan, and fromString to Date (according to spec).
1109 :     Cleaned/corrected implementation of Date.
1110 :     (Still need to check for correctness; implement better canonicalizeDate.)
1111 :     11. Added "scan" to signature IEEE_REAL.
1112 :     12. Some improvements to IntInf [in particular: efficiency-hack for
1113 :     mod and rem when second operand is 2 (for parity checks).]
1114 :     13. Changed representation of type Time.time, using a single IntInf.int
1115 :     value counting microseconds. This considerably simplified the
1116 :     implementation of structure Time. We now support negative time
1117 :     values; scan and fromString handle signs.
1118 :     14. Functor PrimIO now takes two additional arguments (VectorSlice and
1119 :     ArraySlice).
1120 :    
1121 :     ----------------------------------------------------------------------
1122 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1123 : mblume 1347 Date: 2003/08/28 17:00:00 CDT
1124 :     Tag: blume-20030828-intinf
1125 :     Description:
1126 :    
1127 :     This is a major update which comes with a version number bump
1128 :     (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
1129 :     and an implementation of IntInf in the Basis.
1130 :    
1131 :     There are a fairly large number of related changes and updates throughout
1132 :     the system:
1133 :    
1134 :     Basis:
1135 :     - Implemented IntInf.
1136 :     - Made LargeInt a projection of IntInf (by filtering through INTEGER).
1137 : mblume 1348 - Added some missing Real64 operations, most notably Real.toLargeInt.
1138 : mblume 1347 - Added FixedInt as a synonym for Int32.
1139 :    
1140 :     compiler:
1141 :     * Added support for a built-in intinf type.
1142 :     - literals
1143 :     - pattern matching
1144 :     - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
1145 :     - overloading on literals and operations
1146 :    
1147 :     This required adding a primitive type intinf, some additional
1148 :     primops, and implementations for several non-trivial intinf
1149 :     operations in Core. (The intinf type is completely abstract
1150 :     to the compiler; all operations get delegated back to the Core.)
1151 :    
1152 :     * Intinf equality is handled by polyequal. However, the compiler
1153 :     does not print its usual warning in this case (since polyequal
1154 :     is the right thing to do there).
1155 :    
1156 :     * Improved the organization of structure InlineT.
1157 :    
1158 :     * A word about conversion primops:
1159 :     If conversions involving intinf do not cancel out during
1160 : mblume 1348 CPS contract, then the compiler must insert calls to Core functions.
1161 : mblume 1347 Since all core access must be resolved already during the FLINT
1162 :     translate phase, it would be too late a the time of CPS contract
1163 : mblume 1348 to add new Core calls. For this reason, conversion primops
1164 : mblume 1347 for intinf carry two arguments: 1. the numeric argument that
1165 :     they are supposed to convert, and 2. the Core function that
1166 :     can help with this conversion if necessary. If CPS contract
1167 : mblume 1348 eliminates a primop, then the associated Core function becomes
1168 :     dead and goes away. Intinf conversion primops that do not get
1169 :     eliminated by CPS contract get rewritten into calls of their
1170 :     core functions by a separate, new phase.
1171 : mblume 1347
1172 :     interactive system:
1173 :     - Control.Print.intinfDepth controls max length of intinf constants
1174 :     being printed. (Analogous to Control.Print.stringDepth.)
1175 :     - Cleanup in printutil and pputil: got rid of unused stuff and
1176 :     duplicates; replaced some of the code with code that makes better
1177 :     use of library functionality.
1178 :    
1179 :     CM:
1180 :     Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
1181 :     are no longer silent.
1182 :    
1183 :     CKIT:
1184 :     Fixed mismatched uses of Int32 and LargeInt. I always decided
1185 :     in favor of LargeInt -- which is now the same as IntInf.
1186 :     CKIT-knowledgable people should check whether this is what's
1187 :     intended and otherwise change things back to using Int32 or
1188 :     FixedInt.
1189 :    
1190 :     Throughout the code:
1191 : mblume 1348 Started using IntInf.int literals and built-in operations
1192 : mblume 1347 (e.g., comparison with 0) where this seems appropriate.
1193 :    
1194 :    
1195 :     ----------------------------------------------------------------------
1196 : macqueen 1343 Name: Dave MacQueen (dbm@cs.uchicago.edu)
1197 :     Date: 2003/08/13 11:36:00 CDT
1198 :     Tag: dbm-20030813-mcz-merge1
1199 :     Description:
1200 :    
1201 :     Merging changes from the mcz-branch development branch into trunk.
1202 :     These changes involve replacement of the emulated old prettyprinter
1203 :     interface with direct use of the SML/NJ Lib PP library, and fixing
1204 :     of a couple of bugs (895, 1186) relating to error messages. A new
1205 :     prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
1206 :     has been added.
1207 :    
1208 :     ----------------------------------------------------------------------
1209 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1210 : mblume 1342 Date: 2003/08/11 15:45:00 CDT
1211 :     Tag: blume-20030811-windows
1212 :     Description:
1213 :    
1214 :     Version number bumped to 110.42.9. NEW BOOTFILES!!!
1215 :    
1216 :     http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
1217 :    
1218 :     This patch restores SML/NJ's ability to run under win32. There are a
1219 :     number of changes, including fixes for several bugs that had gone
1220 :     unnoticed until now:
1221 :    
1222 :     - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
1223 :     trying to run the win32 version from within cygwin.)
1224 :    
1225 :     - There are a number of simple .bat scripts that substitute for their
1226 :     corresponding Unix shell-scripts. (See below.)
1227 :    
1228 :     - The internals of ml-build have been modified slightly. The main
1229 :     difference is that instead of calling ".link-sml" (or link-sml.bat)
1230 :     using OS.Process.system, the ML process delegates this task back
1231 :     to the script. Otherwise problems arise in mixed environments such
1232 :     as Cygwin where scripts look and work like Unix scripts, but
1233 :     where OS.Process.system cannot run them.
1234 :    
1235 :     - In CM, the srcpath pickler used native pathname syntax -- which
1236 :     is incorrect in the case of cross-compilation. The new pickle format
1237 :     is independent of platform-specific naming conventions.
1238 :    
1239 :     - Path configuration files (such as lib/pathconfig) can now choose
1240 :     between native and standard syntax. Placing a line of the form
1241 :    
1242 :     standard!
1243 :    
1244 :     into the file causes all subsequent paths to be interpreted using
1245 :     CM standard pathname syntax (= Unix conventions); a line
1246 :    
1247 :     native!
1248 :    
1249 :     switches back to native style. This was needed so that
1250 :     path config files can be written portably, see src/system/pathconfig.
1251 :    
1252 :     - Runtime system:
1253 :    
1254 :     - win32-filesys.c: get_file_time and set_file_time now
1255 :     access modification time, not creation time.
1256 :    
1257 :     - I/O code made aware of new array representation.
1258 :    
1259 :     - Bug fixes in X86.prim.masm.
1260 :    
1261 :     - src/system/makeml made aware of win32. (For use under cygwin
1262 :     and other Unix-environments for windows.)
1263 :    
1264 :     - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
1265 :     which caused BinIO.inputAll to fail consistently.
1266 :    
1267 :     .bat scripts:
1268 :    
1269 :     Windows .bat scripts assume that SMLNJ_HOME is defined.
1270 :    
1271 :     - sml.bat, ml-yacc.bat, ml-lex.bat: Driver scripts for standalone
1272 :     applications (sml, ml-yacc, ml-lex).
1273 :     - ml-build.bat: analogous to ml-build.
1274 :     - config\install.bat: Analogous to config/install.sh. This requires
1275 :     that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
1276 :     (nmake etc. must be on the path, and vcvars32 must have been run.)
1277 :     Moreover, sources for ml-lex and ml-yacc need to exist under src,
1278 :     and the bootfile hierarchy must have been unpacked under
1279 :     sml.boot.x86-win32.
1280 :     The script is very primitive and does a poor job at error checking.
1281 :     It only installs the base system, ml-lex, and ml-yacc. No other
1282 :     libraries are being installed (i.e., you get only those that
1283 :     are part of the compiler.)
1284 :     - link-sml.bat: analogous to .link-sml, but not currently used
1285 :    
1286 :     Unrelated bug fixes:
1287 :    
1288 :     - ml-nlffigen now exports structures ST_* corresponding to incomplete
1289 :     types.
1290 :     - Added getDevice to PP/src/pp-debug-fn.sml. (Would not compile
1291 :     otherwise.)
1292 :    
1293 :     ----------------------------------------------------------------------
1294 : macqueen 1337 Name: Dave MacQueen (macqueen@cs.uchicago.edu)
1295 :     Date: 2003/06/17
1296 :     Tag: macqueen-20030617-bug895
1297 :     Description:
1298 :    
1299 :     Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
1300 :     Tag will be used for new development branch (mcz-branch) for
1301 :     use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
1302 :    
1303 :     ----------------------------------------------------------------------
1304 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1305 : mblume 1335 Date: 2003/05/27 16:55:00 CDT
1306 :     Tag: blume-20030527-polyeq
1307 :     Description:
1308 :    
1309 :     Tried to eliminated most cases of polymorphic equality.
1310 :    
1311 :     ----------------------------------------------------------------------
1312 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1313 : mblume 1334 Date: 2003/05/21 17:45:00 CDT
1314 :     Tag: blume-20030517-complete
1315 :     Description:
1316 :    
1317 :     Two changes:
1318 :    
1319 :     1. Added a flag for controlling whether non-exhaustive bindings will
1320 :     be treated as errors (default is false).
1321 :     2. Cleaned up the *entire* source tree so that CMB.make goes through
1322 :     without a single non-exhaustive match- or bind warning.
1323 :    
1324 :     ----------------------------------------------------------------------
1325 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1326 : mblume 1332 Date: 2003/05/17 10:20:00 CDT
1327 :     Tag: blume-20030517-absyn
1328 :     Description:
1329 :    
1330 :     1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
1331 :    
1332 :     This mainly affects the quality of error messages. However, some
1333 :     of the code is now more straightforward than before. (Treatment of
1334 :     the above four constructs in translate.sml is much simpler than
1335 :     the "macro-expansion" that was going on before. Plus, the mach-
1336 :     compiler no longer gets invoked just to be able to compile an
1337 :     if-expression.)
1338 :    
1339 :     2. The ErrorMsg.Error exception is now caught and absorbed by the
1340 :     interactive loop.
1341 :    
1342 :     ----------------------------------------------------------------------
1343 : allenleung 1327 Name: Allen Leung
1344 :     Date: 2003/05/16 13:05:00 CDT
1345 :     Tag: leunga-20030516-cygwin-runtime
1346 :     Description:
1347 :    
1348 :     Ported the runtime system to cygwin, which uses the unix
1349 :     x86-unix bin files. Missing/buggy features:
1350 :    
1351 :     o getnetbyname, getnetbyaddr: these functions seem to be missing in
1352 :     the Cygwin library.
1353 :     o Ctrl-C handling may be flaky.
1354 :     o Windows system calls and Windows I/O are not supported.
1355 :    
1356 :     A new set of binfiles is located at:
1357 :    
1358 :     http://www.dorsai.org/~leunga/boot.x86-unix.tgz
1359 :    
1360 :     This is only needed for bootstrapping the cygwin version of smlnj.
1361 :     Other x86 versions can use the existing binfiles.
1362 :    
1363 :     ----------------------------------------------------------------------
1364 : mblume 1317 Name: Matthias Blume
1365 :     Date: 2003/04/08 15:42:00 CDT
1366 :     Tag: blume-20030408-listpair
1367 :     Description:
1368 :    
1369 :     1. Added a target 'mlrisc' to installer.
1370 :    
1371 :     2. Added missing elements to structure ListPair.
1372 :    
1373 :     ----------------------------------------------------------------------
1374 : leunga 1296 Name: Allen Leung
1375 :     Date: 2003/01/07 10:40:00 EST
1376 :     Tag: leunga-20030107-int-rem
1377 :     Description:
1378 :    
1379 :     Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
1380 :     The arguments to the SUBL instruction were swapped.
1381 :    
1382 :     ----------------------------------------------------------------------
1383 : blume 1229 Name: Matthias Blume
1384 : blume 1294 Date: 2002/12/12 16:25:00 EST
1385 :     Tag: blume-20021212-risc-ra
1386 :     Description:
1387 :    
1388 :     Fixed a serious bug in the rewrite code for FP spilling/reloading that
1389 :     sent the RA into an infinite loop when floating point registers get
1390 :     spilled. (Because of this bug, e.g., nucleic stopped compiling between
1391 :     110.37 and 110.38.)
1392 :     There was another set of potential problems related to the handling of
1393 :     MLRISC annotations (but those did not yet cause real problems, apparently).
1394 :    
1395 :     ----------------------------------------------------------------------
1396 :     Name: Matthias Blume
1397 : blume 1291 Date: 2002/12/06 22:40:00 EST
1398 :     Tag: blume-20021206-cm-fileid
1399 :     Description:
1400 :    
1401 :     Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
1402 :     This fixes the problem of CM getting confused by files that suddenly
1403 :     change their identity (e.g., by getting unlinked and recreated by some
1404 :     text editor such as vi). There might be a better/cheaper/cleaner way
1405 :     of doing this, but for now this will have to do.
1406 :    
1407 :     ----------------------------------------------------------------------
1408 :     Name: Matthias Blume
1409 : blume 1288 Date: 2002/10/28 09:50:00 EST
1410 :     Tag: blume-20021028-typecheck
1411 :     Description:
1412 :    
1413 :     Exported structure Typecheck from $smlnj/viscomp/core.cm.
1414 :    
1415 :     ----------------------------------------------------------------------
1416 :     Name: Matthias Blume
1417 : blume 1282 Date: 2002/10/17 09:10:00 EDT
1418 : blume 1279 Tag: Release_110_42
1419 :     Description:
1420 :    
1421 : blume 1282 In good old tradition, there has been a slight hiccup so that we have
1422 :     to patch 110.42 after the fact. The old release tag has been replaced
1423 :     (see below).
1424 :    
1425 :     The change solves a problem with two competing approaches the
1426 :     configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
1427 :     each other's way.
1428 :    
1429 :     This change only affects the runtime system code and the installer script.
1430 :     (No new bootfiles.)
1431 :    
1432 :     ----------------------------------------------------------------------
1433 :     Name: Matthias Blume
1434 :     Date: 2002/10/16 12:00:00 EDT
1435 :     Tag: Release_110_42_removed
1436 :     Description:
1437 :    
1438 : blume 1279 New working release. New bootfiles.
1439 :    
1440 :     ----------------------------------------------------------------------
1441 :     Name: Matthias Blume
1442 : blume 1273 Date: 2002/10/10 13:10:00 EDT
1443 :     Tag: blume-20021010-ppc-divs
1444 :     Description:
1445 :    
1446 :     The mltree operator DIVS must be implemented with an overflow check on
1447 :     the PPC because the hardware indicates divide-by-zero using "overflow" as
1448 :     well.
1449 :    
1450 :     ----------------------------------------------------------------------
1451 :     Name: Matthias Blume
1452 : blume 1261 Date: 2002/07/23 11:45:00
1453 :     Tag: blume-20020723-smlnj-home
1454 :     Description:
1455 :    
1456 :     Sml now senses the SMLNJ_HOME environment variable. If this is set,
1457 :     then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1458 :     CM_PATHCONFIG is also set), the path configuration file is assumed
1459 :     to be in $SMLNJ_HOME/lib/pathconfig. This way one can easily move
1460 :     the entire tree to some other place and everything will "just work".
1461 :    
1462 :     (Companion commands such as ml-build and ml-makedepend also sense this
1463 :     variable.)
1464 :    
1465 :     ----------------------------------------------------------------------
1466 :     Name: Matthias Blume
1467 : blume 1259 Date: 2002/07/12 21:19:00 EDT
1468 :     Tag: blume-20020712-liveness
1469 :     Description:
1470 :    
1471 :     Exported two useful "step" functions from liveness module (MLRISC).
1472 :    
1473 :     ----------------------------------------------------------------------
1474 :     Name: Matthias Blume
1475 : blume 1253 Date: 2002/07/05 16:00 EDT
1476 :     Tag: Release_110_41
1477 :     Description:
1478 :    
1479 :     New working release. New bootfiles.
1480 :    
1481 :     ----------------------------------------------------------------------
1482 :     Name: Matthias Blume
1483 : blume 1250 Date: 2002/07/05 10:25:00 EDT
1484 :     Tag: blume-20020705-btimp
1485 :     Description:
1486 :    
1487 :     Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1488 :     other clients can set up backtracing support.
1489 :    
1490 :     ----------------------------------------------------------------------
1491 :     Name: Matthias Blume
1492 : blume 1249 Date: 2002/06/25 17:23:00 EDT
1493 :     Tag: blume-20020625-fpmax
1494 :     Description:
1495 :    
1496 :     Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1497 :     case. (The sense of the isNaN test was reversed -- which made min and
1498 :     max always return their first argument.)
1499 :    
1500 :     ----------------------------------------------------------------------
1501 :     Name: Matthias Blume
1502 : blume 1240 Date: 2002/06/11
1503 :     Tag: blume-20020611-unixpath
1504 :     Description:
1505 :    
1506 :     Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1507 :    
1508 :     ----------------------------------------------------------------------
1509 :     Name: Matthias Blume
1510 : blume 1238 Date: 2002/06/10 16:35:00 EDT
1511 :     Tag: blume-20020610-ieeereal
1512 :     Description:
1513 :    
1514 :     I back-ported my implementation of IEEEReal.fromString from the
1515 :     idlbasis-devel branch so that we can test it.
1516 :    
1517 :     Another small change is that ppDec tries to give more information
1518 :     than just "<sig>" in the case of functors. However, this code is
1519 :     broken in some mysterious way if the functor's body's signature
1520 :     has not been declared by ascription but gets inferred from the
1521 :     implementation. This needs fixing...
1522 :    
1523 :     ----------------------------------------------------------------------
1524 :     Name: Matthias Blume
1525 : blume 1229 Date: 2002/05/31
1526 :     Tag: blume-20020531-btrace-mode
1527 :     Description:
1528 :    
1529 :     Resurrected SMLofNJ.Internals.BTrace.mode. (It accidentally fell by
1530 :     the wayside when I switched over to using Controls everywhere.)
1531 :    
1532 :     ----------------------------------------------------------------------
1533 : george 1222 Name: Lal George
1534 :     Date: 2002/05/23 12:21:40 EDT
1535 :     Tag: george-20020523-visual-labels
1536 :     Description:
1537 :    
1538 :     Labels are now displayed in the graphical output to make
1539 :     the fall-through and target blocks obvious.
1540 :    
1541 :     ----------------------------------------------------------------------
1542 : blume 1204 Name: Matthias Blume
1543 : blume 1220 Date: 2002/05/22 11:03:00 EDT
1544 :     Tag: blume-20020522-shrink
1545 :     Description:
1546 :    
1547 :     John tweaked yesterday's fix for 1131 to handle an out-of-memory
1548 :     situation that comes up when allocating huge arrays.
1549 :    
1550 :     ----------------------------------------------------------------------
1551 :     Name: Matthias Blume
1552 : blume 1215 Date: 2002/05/21 16:00:00 EDT
1553 :     Tag: Release_110_40
1554 :     Description:
1555 :    
1556 :     New working release (110.40). New bootfiles.
1557 :    
1558 :     [Also: John Reppy fixed GC bug 1131.]
1559 :    
1560 :     ----------------------------------------------------------------------
1561 :     Name: Matthias Blume
1562 : blume 1212 Date: 2002/05/21 12:35:00 EDT
1563 :     Tag: blume-20020521-cmdoc
1564 :     Description:
1565 :    
1566 :     CM documentation update.
1567 :    
1568 :     ----------------------------------------------------------------------
1569 :     Name: Matthias Blume
1570 : blume 1211 Date: 2002/05/21 10:55:00 EDT
1571 :     Tag: blume-20020521-misc
1572 :     Description:
1573 :    
1574 :     - John tweaked runtime to be silent on heap export (except when
1575 :     GC messages are on).
1576 :     - I added a few more things (cross-compiling versions of CMB) to
1577 :     config/preloads (as suggestions).
1578 :    
1579 :     ----------------------------------------------------------------------
1580 :     Name: Matthias Blume
1581 : blume 1208 Date: 2002/05/20 22:25:00 EDT
1582 :     Tag: blume-20020520-controls
1583 :     Description:
1584 :    
1585 :     - Added ControlUtil structure to control-lib.cm.
1586 :     - Use it throughout.
1587 :     - Used Controls facility to define MLRISC controls (as opposed to
1588 :     registering MLRISC control ref cells with Controls after the fact)
1589 :     - Fixed messed-up controls priorities.
1590 :    
1591 :     * Removed again all the stuff from config/preloads that one wouldn't
1592 :     be able to preload at the time the initial heap image is built.
1593 :     (Many libraries, e.g., CML, do not exist yet at this time. The
1594 :     only libraries that can be preloaded via config/preloads are those
1595 :     that come bundled with the bootfiles.)
1596 :    
1597 :     ----------------------------------------------------------------------
1598 :     Name: Matthias Blume
1599 : blume 1204 Date: 2002/05/20 10:59:00 EDT
1600 :     Tag: blume-20020520-preloads
1601 :     Description:
1602 :    
1603 :     Added a lot of commented-out suggestions for things to be included
1604 :     in config/preloads.
1605 :    
1606 :     ----------------------------------------------------------------------
1607 : leunga 1203 Name: Allen Leung
1608 :     Date: 2002/05/18 14:20:00 EDT
1609 :     Tag: leunga-20020518-mdl
1610 :     Description:
1611 :    
1612 :     o Made the mdl tool stuff compile and run again.
1613 :     o I've disabled all the stuff that depends on RTL specifications; they
1614 :     are all badly broken anyway.
1615 :    
1616 :     ----------------------------------------------------------------------
1617 : blume 1201 Name: Matthias Blume
1618 :     Date: 2002/05/17 16:49:00 EDT
1619 :     Tag: blume-20020517-controls
1620 :     Description:
1621 :    
1622 :     0. John Reppy made several modifications to the SML/NJ library.
1623 :     In particular, there is a shiny new controls-lib.cm.
1624 :    
1625 :     1. Pushed new controls interface through compiler so that everything
1626 :     compiles again.
1627 :    
1628 :     2. Added FormatComb and FORMAT_COMB to the CML version of the
1629 :     SML/NJ library (so that CML compiles again).
1630 :    
1631 :     3. Modified init scripts because XXX_DEFAULT environment variables
1632 :     are no longer with us. (Boot-time initialization is now done
1633 :     using the same environment variables that are also used for
1634 :     startup-time initialization of controls.)
1635 :    
1636 :     ----------------------------------------------------------------------
1637 : george 1192 Name: Lal George
1638 :     Date: 2002/05/15 09:20:10 EDT
1639 :     Tag: george-20020515-pseudo-op-decls
1640 :     Description:
1641 :    
1642 :     All pseudo-ops emitted before the first segment declaration
1643 :     such as TEXT, DATA, and BSS directives are assumed to be global
1644 :     declarations and are emitted first in the assembly file. This is
1645 :     useful in a number of situations where one has pseudo-ops that are not
1646 :     specific to any segment, and also works around the constraint that one
1647 :     cannot have client pseudo-ops in the TEXT segment.
1648 :    
1649 :     Because no segment is associated with these declarations it is
1650 :     an error to allocate any space or objects before the first segment
1651 :     directive and an exception will be raised. However, we cannot make
1652 :     this check for client pseudo-ops.
1653 :    
1654 :     These top level declarations are a field in the CFG graph_info.
1655 :     In theory you can continue to add to this field after the CFG has been
1656 :     built -- provided you know what you are doing;-)
1657 :    
1658 :     ----------------------------------------------------------------------
1659 : blume 1175 Name: Matthias Blume
1660 : blume 1190 Date: 2002/05/13 16:40:00 EDT
1661 :     Tag: blume-20020513-pp-etc
1662 :     Description:
1663 :    
1664 :     A few minor bugfixes:
1665 :    
1666 :     - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1667 :     (Bogus printouts for redefined bindings still occur. Compiler
1668 :     bug should no longer occur now. We need to redo the prettyprinter
1669 :     from scratch.)
1670 :    
1671 :     - CM pathname printer now also adds escape sequences for ( and )
1672 :    
1673 :     - commend and docu fixes for ml-nlffi
1674 :    
1675 :     ----------------------------------------------------------------------
1676 :     Name: Matthias Blume
1677 : blume 1189 Date: 2002/05/10 16:40:00 EDT
1678 :     Tag: blume-20020510-erg-textio
1679 :     Description:
1680 :    
1681 :     Applied the following bugfix provided by Emden Gansner:
1682 :    
1683 :     Output is corrupted when outputSubstr is used rather than output.
1684 :    
1685 :     The problem occurs when a substring
1686 :    
1687 :     ss = (s, dataStart, dataLen)
1688 :    
1689 :     where dataStart > 0, fills a stream buffer with avail bytes left.
1690 :     avail bytes of s, starting at index dataStart, are copied into the
1691 :     buffer, the buffer is flushed, and then the remaining dataLen-avail
1692 :     bytes of ss are copied into the beginning of the buffer. Instead of
1693 :     starting this copy at index dataStart+avail in s, the current code
1694 :     starts the copy at index avail.
1695 :    
1696 :     Fix:
1697 :     In text-io-fn.sml, change line 695 from
1698 :     val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1699 :     to
1700 :     val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1701 :    
1702 :     ----------------------------------------------------------------------
1703 :     Name: Matthias Blume
1704 : blume 1186 Date: 2002/04/12 13:55:00 EDT
1705 :     Tag: blume-20020412-assyntax
1706 :     Description:
1707 :    
1708 :     1. Grabbed newer assyntax.h from the XFree86 project.
1709 :     2. Fiddled with how to compile X86.prim.asm without warnings.
1710 :     3. (Very) Minor cleanup in CM.
1711 :    
1712 :     ----------------------------------------------------------------------
1713 :     Name: Matthias Blume
1714 : blume 1185 Date: 2002/04/01 (no joke!) 17:07:00 EST
1715 :     Tag: blume-20020401-x86div
1716 :     Description:
1717 :    
1718 :     Added full support for div/mod/rem/quot on the x86, using the machine
1719 :     instruction's two results (without clumsily recomputing the remainder)
1720 :     directly where appropriate.
1721 :    
1722 :     Some more extensive power-of-two support was added to the x86 instruction
1723 :     selector (avoiding expensive divs, mods, and muls where they can be
1724 :     replaced with cheaper shifts and masks). However, this sort of thing
1725 :     ought to be done earlier, e.g., within the CPS optimizer so that
1726 :     all architectures benefit from it.
1727 :    
1728 :     The compiler compiles to a fixed point, but changes might be somewhat
1729 :     fragile nevertheless. Please, report any strange things that you might
1730 :     see wrt. div/mod/quot/rem...
1731 :    
1732 :     ----------------------------------------------------------------------
1733 :     Name: Matthias Blume
1734 : blume 1184 Date: 2002/03/29 17:22:00
1735 :     Tag: blume-20020329-div
1736 :     Description:
1737 :    
1738 :     Fixed my broken div/mod logic. Unfortunately, this means that the
1739 :     inline code for div/mod now has one more comparison than before.
1740 :     Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1741 :     The problem was with quotient = 0, because that alone does not tell
1742 :     us which way the rounding went. One then has to look at whether
1743 :     remainder and divisor have the same sign... :(
1744 :    
1745 :     Anyway, I replaced the bootfiles with fresh ones...
1746 :    
1747 :     ----------------------------------------------------------------------
1748 :     Name: Matthias Blume
1749 : blume 1183 Date: 2002/03/29 14:10:00 EST
1750 :     Tag: blume-20020329-inlprims
1751 :     Description:
1752 :    
1753 :     NEW BOOTFILES!!! Version number bumped to 110.39.3.
1754 :    
1755 :     Primops have changed. This means that the bin/boot-file formats have
1756 :     changed as well.
1757 :    
1758 :     To make sure that there is no confusion, I made a new version.
1759 :    
1760 :    
1761 :     CHANGES:
1762 :    
1763 :     * removed REMT from mltree (remainder should never overflow).
1764 :    
1765 :     * added primops to deal with divisions of all flavors to the frontend
1766 :    
1767 :     * handled these primops all the way through so they map to their respective
1768 :     MLRISC support
1769 :    
1770 :     * used these primops in the implementation of Int, Int32, Word, Word32
1771 :    
1772 :     * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1773 :    
1774 :     * parameterized INLMIN, INLMAX, and INLABS by a numkind
1775 :    
1776 :     * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1777 :     floating point
1778 :    
1779 :     * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1780 :     and Real (but Real.abs maps to a separate floating-point-only primop)
1781 :    
1782 :    
1783 :     TODO items:
1784 :    
1785 :     * Hacked Alpha32 instruction selection, disabling the selection of REMx
1786 :     instructions because the machine instruction encoder cannot handle
1787 :     them. (Hppa, PPC, and Sparc instruction selection did not handle
1788 :     REM in the first place, and REM is supported by the x86 machine coder.)
1789 :    
1790 :     * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1791 :     selection phase. (The two can be streamlined because the hardware
1792 :     delivers both quotient and remainder at the same time anyway.)
1793 :    
1794 :     * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1795 :     (Currently the behavior is inconsistent both across architectures and
1796 :     wrt. the draft Basis spec.)
1797 :    
1798 :     * Word8 should eventually be handled natively, too.
1799 :    
1800 :     * There seems to be one serious bug in mltree-gen.sml. It appears, though,
1801 :     as if there currently is no execution path that could trigger it in
1802 :     SML/NJ. (The assumptions underlying functions arith and promotable do not
1803 :     hold for things like multiplication and division.)
1804 :    
1805 :     ----------------------------------------------------------------------
1806 :     Name: Matthias Blume
1807 : blume 1181 Date: 2002/03/27 16:27:00 EST
1808 :     Tag: blume-20020327-mlrisc-divisions
1809 :     Description:
1810 :    
1811 :     Added support for all four division operations (ML's div, mod, quot,
1812 :     and rem) to MLRISC. In the course of doing so, I also rationalized
1813 :     the naming (no more annoying switch-around of DIV and QUOT), by
1814 :     parameterizing the operation by div_rounding_mode (which can be either
1815 :     DIV_TO_ZERO or DIV_TO_NEGINF).
1816 :    
1817 :     The generic MLTreeGen functor takes care of compiling all four
1818 :     operations down to only round-to-zero div.
1819 :    
1820 :     Missing pieces:
1821 :    
1822 :     * Doing something smarter than relying on MLTreeGen on architectures
1823 :     like, e.g., the x86 where hardware division delivers both quotient and
1824 :     remainder at the same time. With this, the implementation of the
1825 :     round-to-neginf operations could be further streamlined.
1826 :    
1827 :     * Remove inlining support for div/mod/rem from the frontend and replace it
1828 :     with primops that get carried through to the backend. Do this for all
1829 :     int and word types.
1830 :    
1831 :     ----------------------------------------------------------------------
1832 :     Name: Matthias Blume
1833 : blume 1180 Date: 2002/03/25 17:25:00 EST
1834 :     Tag: blume-20020325-divmod
1835 :     Description:
1836 :    
1837 :     I improved (hopefully without breaking them) the implementation of Int.div,
1838 :     Int.mod, and Int.rem. For this, the code in translate.sml now takes
1839 :     advantage of the following observations:
1840 :    
1841 :     Let q = x quot y r = x rem y
1842 :     d = x div y m = x mod y
1843 :    
1844 :     where "quot" is the round-to-zero version of integer division that
1845 :     hardware usually provides. Then we have:
1846 :    
1847 :     r = x - q * y where neither the * nor the - will overflow
1848 :     d = if q >= 0 orelse x = q * y then q else q - 1
1849 :     where neither the * nor the - will overflow
1850 :     m = if q >= 0 orelse r = 0 then r else r + y
1851 :     where the + will not overflow
1852 :    
1853 :     This results in substantial simplification of the generated code.
1854 :     The following table shows the number of CFG nodes and edges generated
1855 :     for
1856 :     fun f (x, y) = x OPER y
1857 :     (* with OPER \in div, mod, quot, rem *)
1858 :    
1859 :    
1860 :     OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1861 :     --------------------------------------------------------
1862 :     div | 24 | 39 | 12 | 16
1863 :     mod | 41 | 71 | 12 | 16
1864 :     quot | 8 | 10 | 8 | 10
1865 :     rem | 10 | 14 | 8 | 10
1866 :    
1867 :    
1868 :     ----------------------------------------------------------------------
1869 :     Name: Matthias Blume
1870 : blume 1179 Date: 2002/03/25 22:06:00 EST
1871 :     Tag: blume-20020325-cprotobug
1872 :     Description:
1873 :    
1874 :     Fixed a bug in cproto (c prototype decoder).
1875 :    
1876 :     ----------------------------------------------------------------------
1877 :     Name: Matthias Blume
1878 : blume 1178 Date: 2002/03/25 16:00:00 EST
1879 :     Tag: blume-20020325-raw-primops
1880 :     Description:
1881 :    
1882 :     I did some cleanup to Allen's new primop code and
1883 :     replaced yesterday's bootfiles with new ones.
1884 :     (But they are stored in the same place.)
1885 :    
1886 :     ----------------------------------------------------------------------
1887 :     Name: Matthias Blume
1888 : blume 1175 Date: 2002/03/24 22:40:00 EST
1889 :     Tag: blume-20020324-bootfiles
1890 :     Description:
1891 :    
1892 :     Made the bootfiles that Allen asked for.
1893 :    
1894 :     ----------------------------------------------------------------------
1895 : leunga 1174 Name: Allen Leung
1896 :     Date: 2002/03/23 15:50:00 EST
1897 :     Tag: leunga-20020323-flint-cps-rcc-primops
1898 :     Description:
1899 :    
1900 :     1. Changes to FLINT primops:
1901 :    
1902 :     (* make a call to a C-function;
1903 :     * The primop carries C function prototype information and specifies
1904 :     * which of its (ML-) arguments are floating point. C prototype
1905 :     * information is for use by the backend, ML information is for
1906 :     * use by the CPS converter. *)
1907 :     | RAW_CCALL of { c_proto: CTypes.c_proto,
1908 :     ml_args: ccall_type list,
1909 :     ml_res_opt: ccall_type option,
1910 :     reentrant : bool
1911 :     } option
1912 :     (* Allocate uninitialized storage on the heap.
1913 :     * The record is meant to hold short-lived C objects, i.e., they
1914 :     * are not ML pointers. With the tag, the representation is
1915 :     * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1916 :     *)
1917 :     | RAW_RECORD of {tag:bool,sz:int}
1918 :     and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1919 :    
1920 :     2. These CPS primops are now overloaded:
1921 :    
1922 :     rawload of {kind:numkind}
1923 :     rawstore of {kind:numkind}
1924 :    
1925 :     The one argument form is:
1926 :    
1927 :     rawload {kind} address
1928 :    
1929 :     The two argument form is:
1930 :    
1931 :     rawload {kind} [ml object, byte-offset]
1932 :    
1933 :     3. RAW_CCALL/RCC now takes two extra arguments:
1934 :    
1935 :     a. The first is whether the C call is reentrant, i.e., whether
1936 :     ML state should be saved and restored.
1937 :     b. The second argument is a string argument specifying the name of
1938 :     library and the C function.
1939 :    
1940 :     These things are currently not handled in the code generator, yet.
1941 :    
1942 :     4. In CProto,
1943 :    
1944 :     An encoding type of "bool" means "ml object" and is mapped into
1945 :     C prototype of PTR. Note that "bool" is different than "string",
1946 :     even though "string" is also mapped into PTR, because "bool"
1947 :     is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1948 :    
1949 :     5. Pickler/unpicker
1950 :    
1951 :     Changed to handle RAW_RECORD and newest RAW_CCALL
1952 :    
1953 :     6. MLRiscGen,
1954 :    
1955 :     1. Changed to handle the new rawload/rawstore/rawrecord operators.
1956 :     2. Code for handling C Calls has been moved to a new module CPSCCalls,
1957 :     in the file CodeGen/cpscompile/cps-c-calls.sml
1958 :    
1959 :     7. Added the conditional move operator
1960 :    
1961 :     condmove of branch
1962 :    
1963 :     to cps. Generation of this is still buggy so it is currently
1964 :     disabled.
1965 :    
1966 :     ----------------------------------------------------------------------
1967 : george 1168 Name: Lal George
1968 :     Date: 2002/03/22 14:18:25 EST
1969 : george 1171 Tag: george-20020322-cps-branch-prob
1970 : george 1168 Description:
1971 :    
1972 : george 1171 Implemented the Ball-Larus branch prediction-heuristics, and
1973 : george 1168 incorporated graphical viewers for control flow graphs.
1974 :    
1975 : george 1171 Ball-Larus Heuristics:
1976 : george 1168 ---------------------
1977 :     See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1978 :    
1979 :     By design it uses the Dempster-Shafer theory for combining
1980 :     probabilities. For example, in the function:
1981 :    
1982 :     fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1983 :    
1984 :     the ball-larus heuristics predicts that the n=0 is unlikely
1985 :     (OH-heuristic), and the 'then' branch is unlikely because of the
1986 :     RH-heuristic -- giving the 'then' branch an even lower combined
1987 : george 1171 probability using the Dempster-Shafer theory.
1988 : george 1168
1989 :     Finally, John Reppy's loop analysis in MLRISC, further lowers the
1990 :     probability of the 'then' branch because of the loop in the else
1991 :     branch.
1992 :    
1993 :    
1994 :     Graphical Viewing:
1995 :     ------------------
1996 :     I merely plugged in Allen's graphical viewers into the compiler. The
1997 :     additional code is not much. At the top level, saying:
1998 :    
1999 :     Control.MLRISC.getFlag "cfg-graphical-view" := true;
2000 :    
2001 :     will display the graphical view of the control flow graph just before
2002 :     back-patching. daVinci must be in your path for this to work. If
2003 :     daVinci is not available, then the default viewer can be changed
2004 :     using:
2005 :    
2006 :     Control.MLRISC.getString "viewer"
2007 :    
2008 :     which can be set to "dot" or "vcg" for the corresponding viewers. Of
2009 :     course, these viewers must be in your path.
2010 :    
2011 :     The above will display the compilation unit at the level of clusters,
2012 :     many of which are small, boring, and un-interesting. Also setting:
2013 :    
2014 :     Control.MLRISC.getInt "cfg-graphical-view_size"
2015 :    
2016 :     will display clusters that are larger than the value set by the above.
2017 :    
2018 :    
2019 :     ----------------------------------------------------------------------
2020 : blume 1159 Name: Matthias Blume
2021 :     Date: 2002/03/21 22:20:00 EST
2022 :     Tag: blume-20020321-kmp-bugfix
2023 :     Description:
2024 :    
2025 :     Changed the interface to the KMP routine in PreString and fixed
2026 :     a minor bug in one place where it was used.
2027 :    
2028 :     ----------------------------------------------------------------------
2029 : leunga 1156 Name: Allen Leung
2030 : leunga 1158 Date: 2002/03/21 20:30:00 EST
2031 :     Tag: leunga-20020321-cfg
2032 :     Description:
2033 :    
2034 :     Fixed a potential problem in cfg edge splitting.
2035 :    
2036 :     ----------------------------------------------------------------------
2037 :     Name: Allen Leung
2038 : leunga 1156 Date: 2002/03/21 17:15:00 EST
2039 :     Tag: leunga-20020321-x86-fp-cfg
2040 :     Description:
2041 :    
2042 :     1. Recoded the buggy parts of x86-fp.
2043 :    
2044 :     a. All the block reordering code has been removed.
2045 :     We now depend on the block placement phases to do this work.
2046 :    
2047 :     b. Critical edge splitting code has been simplified and moved into the
2048 :     CFG modules, as where they belong.
2049 :    
2050 :     Both of these were quite buggy and complex. The code is now much, much
2051 :     simpler.
2052 :    
2053 :     2. X86 backend.
2054 :    
2055 :     a. Added instructions for 64-bit support. Instruction selection for
2056 :     64-bit has not been committed, however, since that
2057 :     requires changes to MLTREE which haven't been approved by
2058 :     Lal and John.
2059 :    
2060 :     b. Added support for FUCOMI and FUCOMIP when generating code for
2061 :     PentiumPro and above. We only generate these instructions in
2062 :     the fast-fp mode.
2063 :    
2064 :     c. Added cases for JP and JNP in X86FreqProps.
2065 :    
2066 :     3. CFG
2067 :    
2068 :     CFG now has a bunch of methods for edge splitting and merging.
2069 :    
2070 :     4. Machine description.
2071 :    
2072 :     John's simplification of MLTREE_BASIS.fcond broke a few machine
2073 :     description things:
2074 :    
2075 :     rtl-build.{sig,sml} and hppa.mdl fixed.
2076 :    
2077 :     NOTE: the machine description stuff in the repository is still broken.
2078 :     Again, I can't put my fixes in because that involves
2079 :     changes to MLTREE.
2080 :    
2081 :     ----------------------------------------------------------------------
2082 : blume 1145 Name: Matthias Blume
2083 : blume 1155 Date: 2002/03/20 15:55:00 EST
2084 :     Tag: blume-20020320-kmp
2085 :     Description:
2086 :    
2087 :     Implemented Knuth-Morris-Pratt string matching in PreString and used
2088 :     it for String.isSubstring, Substring.isSubstring, and
2089 :     Substring.position.
2090 :    
2091 :     (Might need some stress-testing. Simple examples worked fine.)
2092 :    
2093 :     ----------------------------------------------------------------------
2094 :     Name: Matthias Blume
2095 : blume 1152 Date: 2002/03/19 16:37:00 EST
2096 :     Tag: blume-20020319-witnesses
2097 :     Description:
2098 :    
2099 :     Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
2100 :    
2101 :     This implements a generic mechanism for changing constness qualifiers
2102 :     anywhere within big C types without resorting to outright "casts".
2103 :     (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
2104 :     modify the constness at the outermost level.)
2105 :     The implementation of "convert" is based on the idea of "witness"
2106 :     values -- values that are not used by the operation but whose types
2107 :     "testify" to their applicability. On the implementation side, "convert"
2108 :     is simply a projection (returning its second curried argument). With
2109 :     cross-module inlining, it should not result in any machine code being
2110 :     generated.
2111 :    
2112 :     ----------------------------------------------------------------------
2113 :     Name: Matthias Blume
2114 : blume 1148 Date: 2002/03/15 16:40:00 EST
2115 :     Tag: blume-20020315-basis
2116 :     Description:
2117 :    
2118 :     Provided (preliminary?) implementations for
2119 :    
2120 :     {String,Substring}.{concatWith,isSuffix,isSubstring}
2121 :    
2122 :     and
2123 :    
2124 :     Substring.full
2125 :    
2126 :     Those are in the Basis spec but they were missing in SML/NJ.
2127 :    
2128 :     ----------------------------------------------------------------------
2129 :     Name: Matthias Blume
2130 : blume 1145 Date: 2002/03/14 21:30:00 EST
2131 :     Tag: blume-20020314-controls
2132 :     Description:
2133 :    
2134 :     Controls:
2135 :     ---------
2136 :    
2137 :     1. Factored out the recently-added Controls : CONTROLS stuff and put
2138 :     it into its own library $/controls-lib.cm. The source tree for
2139 :     this is under src/smlnj-lib/Controls.
2140 :    
2141 :     2. Changed the names of types and functions in this interface, so they
2142 :     make a bit more "sense":
2143 :    
2144 :     module -> registry
2145 :     'a registry -> 'a group
2146 :    
2147 :     3. The interface now deals in ref cells only. The getter/setter interface
2148 :     is (mostly) gone.
2149 :    
2150 :     4. Added a function that lets one register an already-existing ref cell.
2151 :    
2152 :     5. Made the corresponding modifications to the rest of the code so that
2153 :     everything compiles again.
2154 :    
2155 :     6. Changed the implementation of Controls.MLRISC back to something closer
2156 :     to the original. In particular, this module (and therefore MLRISC)
2157 :     does not depend on Controls. There now is some link-time code in
2158 :     int-sys.sml that registers the MLRISC controls with the Controls
2159 :     module.
2160 :    
2161 :     CM:
2162 :     ---
2163 :    
2164 :     * One can now specify the lambda-split aggressiveness in init.cmi.
2165 :    
2166 :     ----------------------------------------------------------------------
2167 : leunga 1142 Name: Allen Leung
2168 :     Date: 2002/03/13 17:30:00 EST
2169 :     Tag: leunga-20020313-x86-fp-unary
2170 :     Description:
2171 :    
2172 :     Bug fix for:
2173 :    
2174 :     > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
2175 :     > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
2176 :     > - fun f(x,(y,z)) = Real.~ y;
2177 :     > [autoloading]
2178 :     > [autoloading done]
2179 :     > fchsl (%eax), 184(%esp)
2180 :     > Error: MLRisc bug: X86MCEmitter.emitInstr
2181 :     >
2182 :     > uncaught exception Error
2183 :     > raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
2184 :    
2185 :     The problem was that the code generator did not generate any fp registers
2186 :     in this case, and the ra didn't know that it needed to run the X86FP phase to
2187 :     translate the pseudo fp instruction. This only happened with unary fp
2188 :     operators in certain situations.
2189 :    
2190 :     ----------------------------------------------------------------------
2191 : blume 1137 Name: Matthias Blume
2192 : blume 1140 Date: 2002/03/13 14:00:00 EST
2193 :     Tag: blume-20020313-overload-etc
2194 :     Description:
2195 :    
2196 :     1. Added _overload as a synonym for overload for backward compatibility.
2197 :     (Control.overloadKW must be true for either version to be accepted.)
2198 :    
2199 :     2. Fixed bug in install script that caused more things to be installed
2200 :     than what was requested in config/targets.
2201 :    
2202 :     3. Made CM aware of the (_)overload construct so that autoloading
2203 :     works.
2204 :    
2205 :     ----------------------------------------------------------------------
2206 :     Name: Matthias Blume
2207 : blume 1138 Date: 2002/03/12 22:03:00 EST
2208 :     Tag: blume-20020312-url
2209 :     Description:
2210 :    
2211 :     Forgot to update BOOT and srcarchiveurl.
2212 :    
2213 :     ----------------------------------------------------------------------
2214 :     Name: Matthias Blume
2215 : blume 1137 Date: 2002/03/12 17:30:00 EST
2216 :     Tag: blume-20020312-version110392
2217 :     Description:
2218 :    
2219 :     Yet another version number bump (because of small changes to the
2220 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
2221 :    
2222 :     Changes:
2223 :    
2224 :     The new pid generation scheme described a few weeks ago was overly
2225 :     complicated. I implemented a new mechanism that is simpler and
2226 :     provides a bit more "stability": Once CM has seen a compilation
2227 :     unit, it keeps its identity constant (as long as you do not delete
2228 :     those crucial CM/GUID/* files). This means that when you change
2229 : blume 1145 an interface, compile, then go back to the old interface, and
2230 : blume 1137 compile again, you arrive at the original pid.
2231 :    
2232 :     There now also is a mechanism that instructs CM to use the plain
2233 :     environment hash as a module's pid (effectively making its GUID
2234 :     the empty string). For this, "noguid" must be specified as an
2235 :     option to the .sml file in question within its .cm file.
2236 :     This is most useful for code that is being generated by tools such
2237 :     as ml-nlffigen (because during development programmers tend to
2238 :     erase the tool's entire output directory tree including CM's cached
2239 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
2240 :     revert to the old, broken behavior of SML/NJ, but in specific cases
2241 :     where there is no danger of interface confusion, its use is ok
2242 :     (I think).
2243 :    
2244 :     ml-nlffigen by default generates "noguid" annotations. They can be
2245 :     turned off by specifying -guid in its command line.
2246 :    
2247 :     ----------------------------------------------------------------------
2248 : george 1136 Name: Lal George
2249 :     Date: 2002/03/12 12 14:42:36 EST
2250 :     Tag: george-20020312-frequency-computation
2251 :     Description:
2252 :    
2253 :     Integrated jump chaining and static block frequency into the
2254 :     compiler. More details and numbers later.
2255 : leunga 1025
2256 : george 1003 ----------------------------------------------------------------------
2257 : george 1133 Name: Lal George
2258 :     Date: 2002/03/11 11 22:38:53 EST
2259 :     Tag: george-20020311-jump-chain-elim
2260 :     Description:
2261 :    
2262 :     Tested the jump chain elimination on all architectures (except the
2263 :     hppa). This is on by default right now and is profitable for the
2264 :     alpha and x86, however, it may not be profitable for the sparc and ppc
2265 :     when compiling the compiler.
2266 :    
2267 :     The gc test will typically jump to a label at the end of the cluster,
2268 :     where there is another jump to an external cluster containing the actual
2269 :     code to invoke gc. This is to allow factoring of common gc invocation
2270 :     sequences. That is to say, we generate:
2271 :    
2272 :     f:
2273 :     testgc
2274 :     ja L1 % jump if above to L1
2275 :    
2276 :     L1:
2277 :     jmp L2
2278 :    
2279 :    
2280 :     After jump chain elimination the 'ja L1' instructions is converted to
2281 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
2282 :     up being implemented in their long form (if L2 is far away) using:
2283 :    
2284 :     jbe L3 % jump if below or equal to L3
2285 :     jmp L2
2286 :     L3:
2287 :     ...
2288 :    
2289 :    
2290 :     For large compilation units L2 may be far away.
2291 :    
2292 :    
2293 :     ----------------------------------------------------------------------
2294 : blume 1132 Name: Matthias Blume
2295 :     Date: 2002/03/11 13:30:00 EST
2296 :     Tag: blume-20020311-mltreeeval
2297 :     Description:
2298 :    
2299 :     A functor parameter was missing.
2300 :    
2301 :     ----------------------------------------------------------------------
2302 : leunga 1130 Name: Allen Leung
2303 : leunga 1131 Date: 2002/03/11 10:30:00 EST
2304 : leunga 1142 Tag: leunga-20020311-runtime-string0
2305 : leunga 1131 Description:
2306 :    
2307 :     The representation of the empty string now points to a
2308 :     legal null terminated C string instead of unit. It is now possible
2309 :     to convert an ML string into C string with InlineT.CharVector.getData.
2310 :     This compiles into one single machine instruction.
2311 :    
2312 :     ----------------------------------------------------------------------
2313 :     Name: Allen Leung
2314 : leunga 1130 Date: 2002/03/10 23:55:00 EST
2315 :     Tag: leunga-20020310-x86-call
2316 :     Description:
2317 :    
2318 :     Added machine generation for CALL instruction (relative displacement mode)
2319 :    
2320 :     ----------------------------------------------------------------------
2321 : blume 1128 Name: Matthias Blume
2322 :     Date: 2002/03/08 16:05:00
2323 :     Tag: blume-20020308-entrypoints
2324 :     Description:
2325 :    
2326 :     Version number bumped to 110.39.1. NEW BOOTFILES!
2327 :    
2328 :     Entrypoints: non-zero offset into a code object where execution should begin.
2329 :    
2330 :     - Added the notion of an entrypoint to CodeObj.
2331 :     - Added reading/writing of entrypoint info to Binfile.
2332 :     - Made runtime system bootloader aware of entrypoints.
2333 :     - Use the address of the label of the first function given to mlriscGen
2334 :     as the entrypoint. This address is currently always 0, but it will
2335 :     not be 0 once we turn on block placement.
2336 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
2337 :     with entry points) from mlriscGen.
2338 :    
2339 :     ----------------------------------------------------------------------
2340 : leunga 1127 Name: Allen Leung
2341 :     Date: 2002/03/07 20:45:00 EST
2342 :     Tag: leunga-20020307-x86-cmov
2343 :     Description:
2344 :    
2345 :     Bug fixes for CMOVcc on x86.
2346 :    
2347 :     1. Added machine code generation for CMOVcc
2348 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
2349 :     3. CMOVcc cannot have an immediate operand as argument.
2350 :    
2351 :     ----------------------------------------------------------------------
2352 : blume 1126 Name: Matthias Blume
2353 :     Date: 2002/03/07 16:15:00 EST
2354 :     Tag: blume-20020307-controls
2355 :     Description:
2356 :    
2357 :     This is a very large but mostly boring patch which makes (almost)
2358 :     every tuneable compiler knob (i.e., pretty much everything under
2359 :     Control.* plus a few other things) configurable via both the command
2360 :     line and environment variables in the style CM did its configuration
2361 :     until now.
2362 :    
2363 :     Try starting sml with '-h' (or, if you are brave, '-H')
2364 :    
2365 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
2366 :     implements the underlying generic mechanism.
2367 :    
2368 :     The interface to some of the existing such facilities has changed somewhat.
2369 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
2370 :     (The getFoo interface is still there for backward-compatibility, but its
2371 :     use is deprecated.)
2372 :    
2373 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
2374 :     that one can now twiddle the compiler settings when using this "batch"
2375 :     compiler.
2376 :    
2377 :     TODO items:
2378 :    
2379 :     We should go through and throw out all controls that are no longer
2380 :     connected to anything. Moreover, we should go through and provide
2381 :     meaningful (and correct!) documentation strings for those controls
2382 :     that still are connected.
2383 :    
2384 :     Currently, multiple calls to Controls.new are accepted (only the first
2385 :     has any effect). Eventually we should make sure that every control
2386 :     is being made (via Controls.new) exactly once. Future access can then
2387 :     be done using Controls.acc.
2388 :    
2389 :     Finally, it would probably be a good idea to use the getter-setter
2390 :     interface to controls rather than ref cells. For the time being, both
2391 :     styles are provided by the Controls module, but getter-setter pairs are
2392 :     better if thread-safety is of any concern because they can be wrapped.
2393 :    
2394 :     *****************************************
2395 :    
2396 :     One bug fix: The function blockPlacement in three of the MLRISC
2397 :     backpatch files used to be hard-wired to one of two possibilities at
2398 :     link time (according to the value of the placementFlag). But (I
2399 :     think) it should rather sense the flag every time.
2400 :    
2401 :     *****************************************
2402 :    
2403 :     Other assorted changes (by other people who did not supply a HISTORY entry):
2404 :    
2405 :     1. the cross-module inliner now works much better (Monnier)
2406 :     2. representation of weights, frequencies, and probabilities in MLRISC
2407 :     changed in preparation of using those for weighted block placement
2408 :     (Reppy, George)
2409 :    
2410 :     ----------------------------------------------------------------------
2411 : george 1116 Name: Lal George
2412 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
2413 :     Tag: george-20020307-weighted-block-placement
2414 :    
2415 :     Tested the weighted block placement optimization on all architectures
2416 :     (except the hppa) using AMPL to generate the block and edge frequencies.
2417 :     Changes were required in the machine properties to correctly
2418 :     categorize trap instructions. There is an MLRISC flag
2419 :     "weighted-block-placement" that can be used to enable weighted block
2420 :     placement, but this will be ineffective without block/edge
2421 :     frequencies (coming soon).
2422 :    
2423 :    
2424 :     ----------------------------------------------------------------------
2425 :     Name: Lal George
2426 : george 1116 Date: 2002/03/05 17:24:48 EST
2427 :     Tag: george-20020305-linkage-cluster
2428 :    
2429 : george 1124 In order to support the block placement optimization, a new cluster
2430 :     is generated as the very first cluster (called the linkage cluster).
2431 :     It contains a single jump to the 'real' entry point for the compilation
2432 :     unit. Block placement has no effect on the linkage cluster itself, but
2433 :     all the other clusters have full freedom in the manner in which they
2434 :     reorder blocks or functions.
2435 : george 1116
2436 :     On the x86 the typical linkage code that is generated is:
2437 :     ----------------------
2438 :     .align 2
2439 :     L0:
2440 :     addl $L1-L0, 72(%esp)
2441 : george 1124 jmp L1
2442 : george 1116
2443 :    
2444 :     .align 2
2445 :     L1:
2446 :     ----------------------
2447 :    
2448 :     72(%esp) is the memory location for the stdlink register. This
2449 :     must contain the address of the CPS function being called. In the
2450 : george 1124 above example, it contains the address of L0; before
2451 : george 1116 calling L1 (the real entry point for the compilation unit), it
2452 :     must contain the address for L1, and hence
2453 :    
2454 :     addl $L1-L0, 72(%esp)
2455 :    
2456 : george 1124 I have tested this on all architectures except the hppa.The increase
2457 :     in code size is of course negligible
2458 : george 1116
2459 :     ----------------------------------------------------------------------
2460 : leunga 1115 Name: Allen Leung
2461 :     Date: 2002/03/03 13:20:00 EST
2462 :     Tag: leunga-20020303-mlrisc-tools
2463 :    
2464 :     Added #[ ... ] expressions to mlrisc tools
2465 :    
2466 :     ----------------------------------------------------------------------
2467 : blume 1096 Name: Matthias Blume
2468 : blume 1098 Date: 2002/02/27 12:29:00 EST
2469 :     Tag: blume-20020227-cdebug
2470 :     Description:
2471 :    
2472 :     - made types in structure C and C_Debug to be equal
2473 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
2474 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
2475 :    
2476 :     ----------------------------------------------------------------------
2477 :     Name: Matthias Blume
2478 : blume 1096 Date: 2002/02/26 12:00:00 EST
2479 :     Tag: blume-20020226-ffi
2480 :     Description:
2481 :    
2482 :     1. Fixed a minor bug in CM's "noweb" tool:
2483 :     If numbering is turned off, then truly don't number (i.e., do not
2484 :     supply the -L option to noweb). The previous behavior was to supply
2485 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
2486 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
2487 :    
2488 :     2. Once again, I reworked some aspects of the FFI:
2489 :    
2490 :     A. The incomplete/complete type business:
2491 :    
2492 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
2493 :     gone!
2494 :     - ML types representing an incomplete type are now *equal* to
2495 :     ML types representing their corresponding complete types (just like
2496 :     in C). This is still safe because ml-nlffigen will not generate
2497 :     RTTI for incomplete types, nor will it generate functions that
2498 :     require access to such RTTI. But when ML code generated from both
2499 :     incomplete and complete versions of the C type meet, the ML types
2500 :     are trivially interoperable.
2501 :    
2502 :     NOTE: These changes restore the full generality of the translation
2503 :     (which was previously lost when I eliminated functorization)!
2504 :    
2505 :     B. Enum types:
2506 :    
2507 :     - Structure C now has a type constructor "enum" that is similar to
2508 :     how the "su" constructor works. However, "enum" is not a phantom
2509 :     type because each "T enum" has values (and is isomorphic to
2510 :     MLRep.Signed.int).
2511 :     - There are generic access operations for enum objects (using
2512 :     MLRep.Signed.int).
2513 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
2514 :     * The structure contains the definition of type "mlrep" (the ML-side
2515 :     representation type of the enum). Normally, mlrep is the same
2516 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
2517 :     then mlrep will be defined as a datatype -- thus facilitating
2518 :     pattern matching on mlrep values.
2519 :     ("-ec" will be suppressed if there are duplicate values in an
2520 :     enumeration.)
2521 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
2522 :     will be generated for each C enum constant xxx.
2523 :     * Conversion functions m2i and i2m convert between mlrep and
2524 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
2525 :     * Coversion functions c and ml convert between mlrep and "tag enum".
2526 :     * Access functions (get/set) fetch and store mlrep values.
2527 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
2528 :     enumerations are merged into one single enumeration represented by
2529 :     structure E_'.
2530 :    
2531 :     ----------------------------------------------------------------------
2532 : leunga 1080 Name: Allen Leung
2533 : leunga 1094 Date: 2002/02/25 04:45:00 EST
2534 :     Tag: leunga-20020225-cps-spill
2535 :    
2536 :     This is a new implementation of the CPS spill phase.
2537 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
2538 :     In case of problems, replace it with the old file spill.sml
2539 :    
2540 :     The current compiler runs into some serious performance problems when
2541 :     constructing a large record. This can happen when we try to compile a
2542 :     structure with many items. Even a very simple structure like the following
2543 :     makes the compiler slow down.
2544 :    
2545 :     structure Foo = struct
2546 :     val x_1 = 0w1 : Word32.int
2547 :     val x_2 = 0w2 : Word32.int
2548 :     val x_3 = 0w3 : Word32.int
2549 :     ...
2550 :     val x_N = 0wN : Word32.int
2551 :     end
2552 :    
2553 :     The following table shows the compile time, from N=1000 to N=4000,
2554 :     with the old compiler:
2555 :    
2556 :     N
2557 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
2558 :     MLRISC ra 0.06u 0.00s 0.05g
2559 :     (spills = 0 reloads = 0)
2560 :     TOTAL 0.63u 0.07s 0.21g
2561 :    
2562 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
2563 :     MLRISC ra 5.68u 0.59s 3.93g
2564 :     (spills = 0 reloads = 0)
2565 :     TOTAL 14.71u 0.99s 4.81g
2566 :    
2567 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
2568 :     MLRISC ra 5.54u 0.65s 3.91g
2569 :     (spills = 543 reloads = 1082)
2570 :     TOTAL 65.40u 3.13s 6.00g
2571 :    
2572 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
2573 :     MLRISC ra 0.80u 0.10s 0.55g
2574 :     (spills = 42 reloads = 84)
2575 :     TOTAL 129.42u 5.10s 4.13g
2576 :    
2577 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
2578 :     MLRISC ra 2.69u 0.27s 1.38g
2579 :     (spills = 62 reloads = 124)
2580 :     TOTAL 682.48u 19.61s 13.99g
2581 :    
2582 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
2583 :     MLRISC ra 4.96u 0.27s 2.72g
2584 :     (spills = 85 reloads = 170)
2585 :     TOTAL 2375.26u 57.21s 48.00g
2586 :    
2587 :     As you can see the old cps spill module suffers from some serious
2588 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
2589 :     instead of patching the problems up, I'm reimplementing it
2590 : leunga 1094 with a different algorithm. The new code is more modular,
2591 :     smaller when compiled, and substantially faster
2592 :     (O(n log n) time and O(n) space). Timing of the new spill module:
2593 :    
2594 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
2595 :     MLRISC ra 0.25u 0.02s 0.15g
2596 :     (spills=1 reloads=3)
2597 :     TOTAL 7.74u 0.34s 1.62g
2598 :    
2599 :     Implementation details:
2600 :    
2601 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
2602 :     number of live variables at any program point (the bandwidth)
2603 :     does not exceed a certain limit, which is determined by the
2604 :     size of the spill area.
2605 :    
2606 :     When the bandwidth is too large, we decrease the register pressure by
2607 :     packing live variables into spill records. How we achieve this is
2608 :     completely different than what we did in the old code.
2609 :    
2610 :     First, there is something about the MLRiscGen code generator
2611 :     that we should be aware of:
2612 :    
2613 :     o MLRiscGen performs code motion!
2614 :    
2615 :     In particular, it will move floating point computations and
2616 :     address computations involving only the heap pointer to
2617 :     their use sites (if there is only a single use).
2618 :     What this means is that if we have a CPS record construction
2619 :     statement
2620 :    
2621 :     RECORD(k,vl,w,e)
2622 :    
2623 :     we should never count the new record address w as live if w
2624 :     has only one use (which is often the case).
2625 :    
2626 :     We should do something similar to floating point, but the transformation
2627 :     there is much more complex, so I won't deal with that.
2628 :    
2629 :     Secondly, there are now two new cps primops at our disposal:
2630 :    
2631 :     1. rawrecord of record_kind option
2632 :     This pure operator allocates some uninitialized storage from the heap.
2633 :     There are two forms:
2634 :    
2635 :     rawrecord NONE [INT n] allocates a tagless record of length n
2636 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
2637 :     and initializes the tag.
2638 :    
2639 :     2. rawupdate of cty
2640 :     rawupdate cty (v,i,x)
2641 :     Assigns to x to the ith component of record v.
2642 :     The storelist is not updated.
2643 :    
2644 :     We use these new primops for both spilling and increment record construction.
2645 :    
2646 :     1. Spilling.
2647 :    
2648 :     This is implemented with a linear scan algorithm (but generalized
2649 :     to trees). The algorithm will create a single spill record at the
2650 :     beginning of the cps function and use rawupdate to spill to it,
2651 :     and SELECT or SELp to reload from it. So both spills and reloads
2652 :     are fine-grain operations. In contrast, in the old algorithm
2653 :     "spills" have to be bundled together in records.
2654 :    
2655 :     Ideally, we should sink the spill record construction to where
2656 :     it is needed. We can even split the spill record into multiple ones
2657 :     at the places where they are needed. But CPS is not a good
2658 :     representation for global code motion, so I'll keep it simple and
2659 :     am not attempting this.
2660 :    
2661 :     2. Incremental record construction (aka record splitting).
2662 :    
2663 :     Long records with many component values which are simulatenously live
2664 :     (recall that single use record addresses are not considered to
2665 :     be live) are constructed with rawrecord and rawupdate.
2666 :     We allocate space on the heap with rawrecord first, then gradually
2667 :     fill it in with rawupdate. This is the technique suggested to me
2668 :     by Matthias.
2669 :    
2670 :     Some restrictions on when this is applicable:
2671 :     1. It is not a VECTOR record. The code generator currently does not handle
2672 :     this case. VECTOR record uses double indirection like arrays.
2673 :     2. All the record component values are defined in the same "basic block"
2674 :     as the record constructor. This is to prevent speculative
2675 :     record construction.
2676 :    
2677 :     ----------------------------------------------------------------------
2678 :     Name: Allen Leung
2679 : leunga 1086 Date: 2002/02/22 01:02:00 EST
2680 :     Tag: leunga-20020222-mlrisc-tools
2681 :    
2682 :     Minor bug fixes in the parser and rewriter
2683 :    
2684 :     ----------------------------------------------------------------------
2685 :     Name: Allen Leung
2686 : leunga 1085 Date: 2002/02/21 20:20:00 EST
2687 :     Tag: leunga-20020221-peephole
2688 :    
2689 :     Regenerated the peephole files. Some contained typos in the specification
2690 :     and some didn't compile because of pretty printing bugs in the old version
2691 :     of 'nowhere'.
2692 :    
2693 :     ----------------------------------------------------------------------
2694 :     Name: Allen Leung
2695 : leunga 1079 Date: 2002/02/19 20:20:00 EST
2696 :     Tag: leunga-20020219-mlrisc-tools
2697 :     Description:
2698 :    
2699 :     Minor bug fixes to the mlrisc-tools library:
2700 :    
2701 :     1. Fixed up parsing colon suffixed keywords
2702 :     2. Added the ability to shut the error messages up
2703 :     3. Reimplemented the pretty printer and fixed up/improved
2704 :     the pretty printing of handle and -> types.
2705 :     4. Fixed up generation of literal symbols in the nowhere tool.
2706 :     5. Added some SML keywords to to sml.sty
2707 :    
2708 :     ----------------------------------------------------------------------
2709 :     Name: Matthias Blume
2710 : blume 1078 Date: 2002/02/19 16:20:00 EST
2711 :     Tag: blume-20020219-cmffi
2712 :     Description:
2713 :    
2714 :     A wild mix of changes, some minor, some major:
2715 :    
2716 :     * All C FFI-related libraries are now anchored under $c:
2717 :     $/c.cm --> $c/c.cm
2718 :     $/c-int.cm --> $c/internals/c-int.cm
2719 :     $/memory.cm --> $c/memory/memory.cm
2720 :    
2721 :     * "make" tool (in CM) now treats its argument pathname slightly
2722 :     differently:
2723 :     1. If the native expansion is an absolute name, then before invoking
2724 :     the "make" command on it, CM will apply OS.Path.mkRelative
2725 :     (with relativeTo = OS.FileSys.getDir()) to it.
2726 :     2. The argument will be passed through to subsequent phases of CM
2727 :     processing without "going native". In particular, if the argument
2728 :     was an anchored path, then "make" will not lose track of that anchor.
2729 :    
2730 :     * Compiler backends now "know" their respective C calling conventions
2731 :     instead of having to be told about it by ml-nlffigen. This relieves
2732 :     ml-nlffigen from one of its burdens.
2733 :    
2734 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
2735 :    
2736 :     * Export C_DEBUG and C_Debug from $c/c.cm.
2737 :    
2738 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
2739 :     subtyping relationship between incomplete pointers and their complete
2740 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
2741 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
2742 :     the pointer target type is complete. In the incomplete case, 'o
2743 :     will be instantiated with some "'c iobj" -- a type obtained by
2744 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
2745 :    
2746 :     Operations that work on both incomplete and complete pointer types are
2747 :     typed as taking an 'o ptr while operations that require the target to
2748 :     be known are typed as taking some ('t, 'c) obj ptr.
2749 :    
2750 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
2751 :     where void is an eqtype without any values. This makes it possible
2752 :     to work on voidptr values using functions meant to operate on light
2753 :     incomplete pointers.
2754 :    
2755 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
2756 :     been vastly simplified.
2757 :    
2758 :     ----------------------------------------------------------------------
2759 :     Name: Matthias Blume
2760 : blume 1076 Date: 2002/02/19 10:48:00 EST
2761 :     Tag: blume-20020219-pqfix
2762 :     Description:
2763 :    
2764 :     Applied Chris Okasaki's bug fix for priority queues.
2765 :    
2766 :     ----------------------------------------------------------------------
2767 :     Name: Matthias Blume
2768 : blume 1073 Date: 2002/02/15 17:05:00
2769 : blume 1069 Tag: Release_110_39
2770 :     Description:
2771 :    
2772 : blume 1073 Last-minute retagging is becoming a tradition... :-(
2773 :    
2774 :     This is the working release 110.39.
2775 :    
2776 :     ----------------------------------------------------------------------
2777 :     Name: Matthias Blume
2778 :     Date: 2002/02/15 16:00:00 EST
2779 :     Tag: Release_110_39-orig
2780 :     Description:
2781 :    
2782 : blume 1069 Working release 110.39. New bootfiles.
2783 :    
2784 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
2785 :     with all shells. So I retagged. -Matthias)
2786 :    
2787 : blume 1069 ----------------------------------------------------------------------
2788 :     Name: Matthias Blume
2789 : blume 1068 Date: 2002/02/15 14:17:00 EST
2790 :     Tag: blume-20020215-showbindings
2791 :     Description:
2792 :    
2793 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
2794 :     the latter can be useful for exploring what bindings are available at
2795 :     the interactive prompt. (The first function returns only the list
2796 :     of symbols that are really bound, the second prints those but also the
2797 :     ones that CM's autoloading mechanism knows about.)
2798 :    
2799 :     ----------------------------------------------------------------------
2800 :     Name: Matthias Blume
2801 : blume 1067 Date: 2002/02/15 12:08:00 EST
2802 :     Tag: blume-20020215-iptrs
2803 :     Description:
2804 :    
2805 :     Two improvements to ml-nlffigen:
2806 :    
2807 :     1. Write files only if they do not exist or if their current contents
2808 :     do not coincide with what's being written. (That is, avoid messing
2809 :     with the time stamps unless absolutely necessary.)
2810 :    
2811 :     2. Implement a "repository" mechanism for generated files related
2812 :     to "incomplete pointer types". See the README file for details.
2813 :    
2814 :     ----------------------------------------------------------------------
2815 :     Name: Matthias Blume
2816 : blume 1066 Date: 2002/02/14 11:50:00 EST
2817 :     Tag: blume-20020214-quote
2818 :     Description:
2819 :    
2820 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
2821 :     because of the new and improved tag generation scheme. (Thanks to Allen
2822 :     Leung for pointing it out.)
2823 :    
2824 :     ----------------------------------------------------------------------
2825 : george 1065 Name: Lal George
2826 :     Date: 2002/02/14 09:55:27 EST 2002
2827 :     Tag: george-20020214-isabelle-bug
2828 :     Description:
2829 :    
2830 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
2831 :     of Isabelle on the x86.
2832 :    
2833 :     From Allen:
2834 :     -----------
2835 :     I've found the problem:
2836 :    
2837 :     in ra-core.sml, I use the counter "blocked" to keep track of the
2838 :     true number of elements in the freeze queue. When the counter goes
2839 :     to zero, I skip examining the queue. But I've messed up the
2840 :     bookkeeping in combine():
2841 :    
2842 :     else ();
2843 :     case !ucol of
2844 :     PSEUDO => (if !cntv > 0 then
2845 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
2846 :     ^^^^^^^^^^^^^^^^^^^^^^^
2847 :     moveu := mergeMoveList(!movev, !moveu)
2848 :     )
2849 :     else ();
2850 :    
2851 :     combine() is called to coalesce two nodes u and v.
2852 :     I think I was thinking that if the move counts of u and v are both
2853 :     greater than zero then after they are coalesced then one node is
2854 :     removed from the freeze queue. Apparently I was thinking that
2855 :     both u and v are of low degree, but that's clearly not necessarily true.
2856 :    
2857 :    
2858 :     02/12/2002:
2859 :     Here's the patch. HOL now compiles.
2860 :    
2861 :     I don't know how this impact on performance (compile
2862 :     time or runtime). This bug caused the RA (especially on the x86)
2863 :     to go thru the potential spill phase when there are still nodes on the
2864 :     freeze queue.
2865 :    
2866 :    
2867 :    
2868 :    
2869 :     ----------------------------------------------------------------------
2870 : blume 1058 Name: Matthias Blume
2871 : blume 1064 Date: 2002/02/13 22:40:00 EST
2872 :     Tag: blume-20020213-fptr-rtti
2873 :     Description:
2874 :    
2875 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
2876 :     updates.
2877 :    
2878 :     ----------------------------------------------------------------------
2879 :     Name: Matthias Blume
2880 : blume 1063 Date: 2002/02/13 16:41:00 EST
2881 :     Tag: blume-20020213-cmlpq
2882 :     Description:
2883 :    
2884 :     Added new priority queue export symbols (which have just been added to
2885 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
2886 :     not compile and the installer would choke.)
2887 :    
2888 :     ----------------------------------------------------------------------
2889 :     Name: Matthias Blume
2890 : blume 1062 Date: 2002/02/13 16:15:00 EST
2891 :     Tag: blume-20020213-various
2892 :     Description:
2893 :    
2894 :     1. More tweaks to ml-nlffigen:
2895 :    
2896 :     - better internal datastructures (resulting in slight speedup)
2897 :     - "-match" option requires exact match
2898 :     - "localized" gensym counters (untagged structs/unions nested within
2899 :     other structs/unions or within typedefs get a fresh counter; their
2900 :     tag will be prefixed by a concatenation of their parents' tags)
2901 :     - bug fixes (related to calculation of transitive closure of types
2902 :     to be included in the output)
2903 :    
2904 :     2. Minor Basis updates:
2905 :    
2906 :     - added implementations for List.collate and Option.app
2907 :    
2908 :     ----------------------------------------------------------------------
2909 :     Name: Matthias Blume
2910 : blume 1060 Date: 2002/02/11 15:55:00 EST
2911 :     Tag: blume-20020211-gensym
2912 :     Description:
2913 :    
2914 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
2915 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
2916 :     names (ML structure names that correspond to unnamed C structs, unions,
2917 :     and enums), so that separate runs of ml-nlffigen do not clash.
2918 :    
2919 :     ----------------------------------------------------------------------
2920 :     Name: Matthias Blume
2921 : blume 1059 Date: 2002/02/11 12:05:00 EST
2922 :     Tag: blume-20020211-gensml
2923 :     Description:
2924 :    
2925 :     A quick fix for a problem with GenSML (in the pgraph-util library):
2926 :     Make generation of toplevel "local" optional. (Strictly speaking,
2927 :     signature definitions within "local" are not legal SML.)
2928 :    
2929 :     Other than that: updates to INSTALL and cm/TODO.
2930 :    
2931 :     ----------------------------------------------------------------------
2932 :     Name: Matthias Blume
2933 : blume 1058 Date: 2002/02/08 15:00:00 EST
2934 :     Tag: blume-20020208-uniquepid
2935 :     Description:
2936 :    
2937 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
2938 :    
2939 :     1. The installer (config/install.sh) has gotten smarter:
2940 :    
2941 :     - Configuration options are a bit easier to specify now
2942 :     (in config/targets).
2943 :     - Bug in recognizing .tar.bz2 files fixed.
2944 :     - Installer automatically resolves dependencies between
2945 :     configuration options (e.g., if you ask for eXene, you will
2946 :     also get cml -- regardless whether you asked for it or not).
2947 :     - Installer can run in "quieter mode" by setting the environment
2948 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
2949 :     "completely silent", though.
2950 :     - Build HashCons library as part of smlnj-lib.
2951 :    
2952 :     2. A new scheme for assigning persistent identifiers to compilation
2953 :     units (and, by extension, to types etc.) has been put into place.
2954 :     This fixes a long-standing bug where types and even dynamic values
2955 :     can get internally confused, thereby compromising type safety
2956 :     (abstraction) and dynamic correctness. See
2957 :    
2958 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
2959 :    
2960 :     for an example of how things could go wrong until now.
2961 :    
2962 :     The downside of the new scheme is that pids are not quite as
2963 :     persistent as they used to be: CM will generate a fresh pid
2964 :     for every compilation unit that it thinks it sees for the first
2965 :     time. That means that if you compile starting from a clean, fresh
2966 :     source tree at two different times, you end up with different
2967 :     binaries.
2968 :    
2969 :     Cutoff recompilation, however, has not been compromised because
2970 :     CM keeps pid information in special caches between runs.
2971 :    
2972 :     ----------------------------------------------------------------------
2973 : george 1053 Name: Lal George
2974 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
2975 :     Tag: <none>
2976 :     Description:
2977 :    
2978 :     Compilers that generate assembly code may produce global labels
2979 :     whose value is resolved at link time. The various peephole optimization
2980 :     modules did not take this in account.
2981 :    
2982 :     TODO. The Labels.addrOf function should really return an option
2983 :     type so that clients are forced to deal with this issue, rather
2984 :     than an exception being raised.
2985 :    
2986 :     ----------------------------------------------------------------------
2987 :     Name: Lal George
2988 : george 1053 Date: 2002/02/06 13:55:02 EST
2989 :     Tag: george-20020206-ra-breakup
2990 :     Description:
2991 :    
2992 :     1. A bug fix from Allen.
2993 :    
2994 :     A typo causes extra fstp %st(0)'s to be generated at compensation
2995 :     edges, which might cause stack underflow traps at runtime. This
2996 :     occurs in fft where there are extraneous fstps right before the 'into'
2997 :     trap instruction (in this case they are harmless since none of the
2998 :     integers overflow.)
2999 :    
3000 : george 1054 2. Pulled out various utility modules that were embedded in the modules
3001 : george 1053 of the register allocator. I need these modules for other purposes, but
3002 : george 1054 they are not complete enough to put into a library (just yet).
3003 : george 1053 ----------------------------------------------------------------------
3004 : blume 1049 Name: Matthias Blume
3005 :     Date: 2002/01/31 16:05:00 EST
3006 :     Tag: blume-20020131-sparc-ccalls
3007 :     Description:
3008 :    
3009 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
3010 :     of extra stack space by mistake. Fixed.
3011 :    
3012 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
3013 :    
3014 :     ----------------------------------------------------------------------
3015 : leunga 1048 Name: Allen Leung
3016 :     Date: 2002/01/30
3017 :     Tag: leunga-20020130-nowhere-bug-fix
3018 :     Description:
3019 :    
3020 :     MLRISC bug fixes:
3021 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
3022 :     2. MachineInt.fromString was negating its value.
3023 :    
3024 :     ----------------------------------------------------------------------
3025 : blume 1039 Name: Matthias Blume
3026 : blume 1047 Date: 2002/01/29
3027 :     Tag: blume-20020129-INSTALL
3028 :     Description:
3029 :    
3030 :     - Added somewhat detailed installation instructions (file INSTALL).
3031 :     - Fixed curl-detection bug in config/install.sh.
3032 :     - It is now possible to select the URL getter using the URLGETTER
3033 :     environment variable:
3034 :    
3035 :     not set / "unknown" --> automatic detection (script tries wget,
3036 :     curl, and lynx)
3037 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
3038 :     how to properly invoke them)
3039 :     other --> use $URLGETTER directly, it must take
3040 :     precisely two command-line arguments
3041 :     (source URL and destination file name)
3042 :    
3043 :     ----------------------------------------------------------------------
3044 :     Name: Matthias Blume
3045 : blume 1044 Date: 2002/01/28
3046 : blume 1045 Tag: blume-20020128-sparc-ccalls
3047 :     Description:
3048 :    
3049 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
3050 :     - Make use of the allocParam argument in sparc-c-calls.
3051 :    
3052 :     ----------------------------------------------------------------------
3053 :     Name: Matthias Blume
3054 :     Date: 2002/01/28
3055 : blume 1044 Tag: blume-20020128-allocParam
3056 :     Description:
3057 :    
3058 :     John Reppy: Changes c-calls API to accept client-callback for
3059 :     allocating extra stack space.
3060 :     me: Corresponding changes to mlriscGen (using a dummy argument that
3061 :     does not change the current behavior).
3062 :    
3063 :     ----------------------------------------------------------------------
3064 :     Name: Matthias Blume
3065 : blume 1040 Date: 2002/01/28 12:00:00
3066 :     Tag: Release_110_38
3067 :     Description:
3068 :    
3069 :     This time for real!!!
3070 :    
3071 :     ----------------------------------------------------------------------
3072 :     Name: Matthias Blume
3073 : blume 1039 Date: 2002/01/28 10:56:00 EST
3074 :     Tag: blume-20020128-retraction
3075 :     Description:
3076 :    
3077 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
3078 :     with blume-Release_110_38-retracted.)
3079 :    
3080 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
3081 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
3082 :    
3083 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
3084 :     and enums fixed. The naming of corresponding ML identifiers should
3085 :     now be consistent again.
3086 :    
3087 :     ----------------------------------------------------------------------
3088 : leunga 1038 Name: Allen Leung
3089 :     Date: 2002/01/27
3090 :     Tag: leunga-20020127-nowhere
3091 :     Description:
3092 :    
3093 :     Added a target called nowhere in the configuration scripts.
3094 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
3095 :     programs with where-clauses into legal SML code) during installation.
3096 :    
3097 :     ----------------------------------------------------------------------
3098 : blume 1036 Name: Matthias Blume
3099 : leunga 1038 Date: 2002/01/25 21:27:00 EST
3100 : blume 1039 Tag: blume-Release_110_38-retracted
3101 : blume 1037 Description:
3102 :    
3103 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
3104 :    
3105 :     README will be added later.
3106 :    
3107 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
3108 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
3109 :    
3110 : blume 1037 ----------------------------------------------------------------------
3111 :     Name: Matthias Blume
3112 : blume 1036 Date: 2002/01/25
3113 :     Tag: blume-20020125-ffi
3114 :     Description:
3115 :    
3116 :     A large number of tweaks and improvements to ml-nlffi-lib and
3117 :     ml-nlffigen:
3118 :    
3119 :     - ML represenation types have been streamlined
3120 :     - getter and setter functions work with concrete values, not abstract
3121 :     ones where possible
3122 :     - ml-nlffigen command line more flexible (see README file there)
3123 :     - some bugs have been fixed (hopefully)
3124 :    
3125 :     ----------------------------------------------------------------------
3126 : george 1034 Name: Lal George
3127 :     Date: 2002/01/24
3128 :     Tag: george-20020124-risc-ra-interface
3129 :     Description:
3130 :    
3131 :     There is a dramatic simplification in the interface to the
3132 :     register allocator for RISC architectures as a result of making
3133 :     parallel copy instructions explicit.
3134 :    
3135 :     ----------------------------------------------------------------------
3136 : blume 1028 Name: Matthias Blume
3137 : blume 1032 Date: 2002/01/22
3138 :     Tag: blume-20020122-x86-ccalls
3139 :     Description:
3140 :    
3141 :     Bug fix for c-calls on x86 (having to do with how char- and
3142 :     short-arguments are being handled).
3143 :    
3144 :     ----------------------------------------------------------------------
3145 :     Name: Matthias Blume
3146 : blume 1031 Date: 2002/01/21
3147 :     Tag: blume-20020121-ff
3148 :     Description:
3149 :    
3150 :     Another day of fiddling with the FFI...
3151 :    
3152 :     1. Bug fix/workaround: CKIT does not complain about negative array
3153 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
3154 :     (Otherwise a negative dimension would send it into an infinite loop.)
3155 :    
3156 :     2. Some of the abstract types (light objects, light pointers, most "base"
3157 :     types) in structure C are now eqtypes.
3158 :    
3159 :     3. Added constructors and test functions for NULL function pointers.
3160 :    
3161 :     ----------------------------------------------------------------------
3162 :     Name: Matthias Blume
3163 : blume 1028 Date: 2002/01/18
3164 : blume 1030 Tag: blume-20020118-ready-for-new-release
3165 :     Description:
3166 :    
3167 :     Made config/srcarchiveurl point to a new place. (Will provide boot
3168 :     files shortly.)
3169 :    
3170 :     Maybe we christen this to be 110.38?
3171 :    
3172 :     ----------------------------------------------------------------------
3173 :     Name: Matthias Blume
3174 :     Date: 2002/01/18
3175 : blume 1029 Tag: blume-20020118-more-ffifiddle
3176 :     Description:
3177 :    
3178 :     Today's FFI fiddling:
3179 :    
3180 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
3181 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
3182 :     of abstract ones.
3183 :    
3184 :     - Provided word-style bit operations etc. for "int" representation
3185 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
3186 :     and Long.
3187 :    
3188 :     ----------------------------------------------------------------------
3189 :     Name: Matthias Blume
3190 :     Date: 2002/01/18
3191 : blume 1028 Tag: blume-20020118-use-x86-fp
3192 :     Description:
3193 :    
3194 :     Now that x86-fast-fp seems to be working, I turned it back on again
3195 :     by default. (Seems to work fine now, even with the FFI.)
3196 :    
3197 :     Other than that, I added some documentation about the FFI to
3198 :     src/ml-nlffigen/README and updated the FFI test examples in
3199 :     src/ml-nlffi-lib/Tests/*.
3200 :    
3201 :     ----------------------------------------------------------------------
3202 : leunga 1025 Name: Allen Leung
3203 :     Date: 2002/01/17
3204 :     Tag: leunga-20020117-x86-fast-fp-call
3205 :     Description:
3206 :    
3207 :     1. Fixed a problem with handling return fp values when x86's fast fp
3208 :     mode is turned on.
3209 :    
3210 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
3211 :     of %f32.
3212 :    
3213 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
3214 :    
3215 :     ----------------------------------------------------------------------
3216 : blume 1021 Name: Matthias Blume
3217 :     Date: 2002/01/16
3218 :     Tag: blume-20020116-ffifiddle
3219 :     Description:
3220 :    
3221 :     More fiddling with the FFI interface:
3222 :    
3223 :     - Make constness 'c instead of rw wherever possible. This eliminates
3224 :     the need for certain explicit coercions. (However, due to ML's
3225 :     value polymorphism, there will still be many cases where explicit
3226 :     coercions are necessary. Phantom types are not the whole answer
3227 :     to modeling a subtyping relationship in ML.)
3228 :    
3229 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
3230 :    
3231 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
3232 :     clumsy workaround for varargs problem.)
3233 :    
3234 :     ----------------------------------------------------------------------
3235 : george 1016 Name: Lal George
3236 :     Date: 2002/01/15
3237 :     Tag: <none>
3238 :     Description:
3239 :    
3240 :     1. Since COPY instructions are no longer native to the architecture,
3241 :     a generic functor can be used to implement the expandCopies function.
3242 :    
3243 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
3244 :     TEXT segment.
3245 :    
3246 :     ----------------------------------------------------------------------
3247 : blume 1011 Name: Matthias Blume
3248 : blume 1015 Date: 2002/01/15
3249 :     Tag: blume-20020115-ffiupdates
3250 :     Description:
3251 :    
3252 :     1. Fix for bug resulting in single-precision float values being returned
3253 :     incorrectly from FFI calls.
3254 :    
3255 :     2. Small modifications to C FFI API:
3256 :    
3257 :     - memory-allocation routines return straight objects (no options)
3258 :     and raise an exception in out-of-memory situations
3259 :     - unsafe extensions to cast between function pointers and pointers
3260 :     from/to ints
3261 :     - added structure C_Debug as an alternative to structure C where
3262 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
3263 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
3264 :     but also takes a (possibly empty) list of existing library handles
3265 :     that the current library depends on
3266 :    
3267 :     ----------------------------------------------------------------------
3268 :     Name: Matthias Blume
3269 : blume 1011 Date: 2002/01/10
3270 :     Tag: blume-20020110-newffigen
3271 :     Description:
3272 :    
3273 :     1. Updates to portable graph code.
3274 :    
3275 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
3276 :     more scalable now so that even huge interfaces such as the one
3277 :     for GTK compile in finite time and space. :-)
3278 :     See src/ml-nlffigen/README for details on what's new.
3279 :    
3280 :     ----------------------------------------------------------------------
3281 : george 1003 Name: Lal George
3282 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
3283 :     Tag: george-20011206-rm-native-copy
3284 :     Description:
3285 :    
3286 :     Removed the native COPY and FCOPY instructions
3287 :     from all the architectures and replaced it with the
3288 :     explicit COPY instruction from the previous commit.
3289 :    
3290 :     It is now possible to simplify many of the optimizations
3291 :     modules that manipulate copies. This has not been
3292 :     done in this change.
3293 :    
3294 :     ----------------------------------------------------------------------
3295 :     Name: Lal George
3296 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
3297 :     Tag: george-20011206-mlrisc-instruction
3298 :     Description:
3299 : george 824
3300 : george 1003 Changed the representation of instructions from being fully abstract
3301 :     to being partially concrete. That is to say:
3302 :    
3303 :     from
3304 :     type instruction
3305 :    
3306 :     to
3307 :     type instr (* machine instruction *)
3308 :    
3309 :     datatype instruction =
3310 :     LIVE of {regs: C.cellset, spilled: C.cellset}
3311 :     | KILL of {regs: C.cellset, spilled: C.cellset}
3312 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
3313 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
3314 :     | INSTR of instr
3315 :    
3316 :     This makes the handling of certain special instructions that appear on
3317 :     all architectures easier and uniform.
3318 :    
3319 :     LIVE and KILL say that a list of registers are live or killed at the
3320 :     program point where they appear. No spill code is generated when an
3321 :     element of the 'regs' field is spilled, but the register is moved to
3322 :     the 'spilled' (which is present, more for debugging than anything else).
3323 :    
3324 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
3325 :     We used to generate:
3326 :    
3327 :     DEFFREG f1
3328 :     f1 := f2 + f3
3329 :     trapb
3330 :    
3331 :     but now generate:
3332 :    
3333 :     f1 := f2 + f3
3334 :     trapb
3335 :     LIVE {regs=[f1,f2,f3], spilled=[]}
3336 :    
3337 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
3338 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
3339 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
3340 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
3341 :     this architecture).
3342 :    
3343 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
3344 :     all the architectures. This will result in further simplification of the
3345 :     register allocator that must be aware of them for coalescing purposes, and
3346 :     will also simplify certain aspects of the machine description that provides
3347 :     callbacks related to parallel copies.
3348 :    
3349 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
3350 :     machine instruction set!
3351 :    
3352 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
3353 :     functions for making porting easier -- essentially converting upper case
3354 :     to lower case. All machine instructions (of type instr) are in upper case,
3355 :     and the lower case form generates an MLRISC instruction. For example on
3356 :     the alpha we have:
3357 :    
3358 :     datatype instr =
3359 :     LDA of {r:cell, b:cell, d:operand}
3360 :     | ...
3361 :    
3362 :     val lda : {r:cell, b:cell, d:operand} -> instruction
3363 :     ...
3364 :    
3365 :     where lda is just (INSTR o LDA), etc.
3366 :    
3367 : leunga 815 ----------------------------------------------------------------------
3368 : blume 986 Name: Matthias Blume
3369 : blume 993 Date: 2001/11/22 21:40:00 EST
3370 :     Tag: Release_110_37
3371 :     Description:
3372 :    
3373 :     Release 110.37. This time for real.
3374 :    
3375 :     ----------------------------------------------------------------------
3376 :     Name: Matthias Blume
3377 : blume 988 Date: 2001/11/21 16:35:00 EST
3378 :     Tag: blume-20011121-foot-in-mouth
3379 :     Description:
3380 :    
3381 :     Removed the "Release_110_37" tag because of a serious bug.
3382 :     This will be re-tagged once the bug is fixed.
3383 :    
3384 :     ----------------------------------------------------------------------
3385 :     Name: Matthias Blume
3386 : blume 987 Date: 2001/11/21 16:14:00 EST
3387 :     Tag: blume-20011121-forgottenfile
3388 :     Description:
3389 :    
3390 :     Forgot to add a file. (Just a .tex-file -- part of
3391 :     the CM manual source.)
3392 :    
3393 :     ----------------------------------------------------------------------
3394 :     Name: Matthias Blume
3395 : blume 986 Date: 2001/11/21 16:10:00 EST
3396 : blume 988 Tag: blume-20011121-invalid_110_37
3397 : blume 986 Description:
3398 :    
3399 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
3400 :     because we found a serious bug in all non-x86 backends.
3401 :     - Matthias
3402 :    
3403 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
3404 :     so that code object name strings are directly inserted into code
3405 :     objects at code generation time. The only business the runtime system
3406 :     has with this is now to read the name strings on occasions.
3407 :     (The encoding of the name string has also changed somewhat.)
3408 :    
3409 :     2. CM now implements a simple "set calculus" for specifying export lists.
3410 :     In particular, it is now possible to refer to the export lists of
3411 :     other libraries/groups/sources and form unions as well as differences.
3412 :     See the latest CM manual for details.
3413 :    
3414 :     3. An separate notion of "proxy" libraries has again be eliminated from
3415 :     CM's model. (Proxy libraries are now simply a special case of using
3416 :     the export list calculus.)
3417 :    
3418 :     4. Some of the existing libraries now take advantage of the new set
3419 :     calculus.
3420 :     (Notice that not all libraries have been converted because some
3421 :     of the existing .cm-files are supposed to be backward compatible
3422 :     with 110.0.x.)
3423 :    
3424 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
3425 :     "General.exnMessage"! The former relies on a certain hook to be
3426 :     initialized, and that often does not happen in the stand-alone case.)
3427 :    
3428 :     ----------------------------------------------------------------------
3429 : george 984 Name: Lal George
3430 :     Date: 2001/11/21 13:56:18 EST
3431 :     Tag: george-2001121-pseudo-ops
3432 :     Description:
3433 :    
3434 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
3435 :     ought to never be any question of incompatabilities with
3436 :     pseudo-op syntax expected by host assemblers.
3437 :    
3438 :     For now, only modules supporting GAS syntax are implemented
3439 :     but more should follow, such as MASM, and vendor assembler
3440 :     syntax, e.g. IBM as, Sun as, etc.
3441 :    
3442 :     ----------------------------------------------------------------------
3443 : blume 977 Name: Matthias Blume
3444 :     Date: 2001/11/14 11:52:00 EST
3445 :     Tag: blume-20011114-srcname
3446 :     Description:
3447 :    
3448 :     1. Routed the name of the current source file to mlriscgen where it
3449 :     should be directly emitted into the code object. (This last part
3450 :     is yet to be done.)
3451 :    
3452 :     2. Some cleanup of the pgraph code to make it match the proposal that
3453 :     I put out the other day. (The proposal notwithstanding, things are
3454 :     still in flux here.)
3455 :    
3456 :     ----------------------------------------------------------------------
3457 : george 976 Name: Lal George
3458 :     Date: 2001/11/14 09:44:04 EST
3459 :     Tag:
3460 :     Description:
3461 :    
3462 :     Fix for a backpatching bug reported by Allen.
3463 :    
3464 :     Because the boundary between short and long span-dependent
3465 :     instructions is +/- 128, there are an astounding number of
3466 :     span-dependent instructions whose size is over estimated.
3467 :    
3468 :     Allen came up with the idea of letting the size of span
3469 :     dependent instructions be non-monotonic, for a maxIter
3470 :     number of times, after which the size must be monotonically
3471 :     increasing.
3472 :    
3473 :     This table shows the number of span-dependent instructions
3474 :     whose size was over-estimated as a function of maxIter, for the
3475 :     file Parse/parse/ml.grm.sml:
3476 :    
3477 :     maxIter # of instructions:
3478 :     10 687
3479 :     20 438
3480 :     30 198
3481 :     40 0
3482 :    
3483 :     In compiling the compiler, there is no significant difference in
3484 :     compilation speed between maxIter=10 and maxIter=40. Actually,
3485 :     my measurements showed that maxIter=40 was a tad faster than
3486 :     maxIter=10! Also 96% of the files in the compiler reach a fix
3487 :     point within 13 iterations, so fixing maxIter at 40, while high,
3488 :     is okay.
3489 :    
3490 :     ----------------------------------------------------------------------
3491 : blume 975 Name: Matthias Blume
3492 :     Date: 2001/10/31 15:25:00 EST
3493 :     Tag: blume-20011031-pgraph
3494 :     Description:
3495 :    
3496 :     CKIT:
3497 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
3498 :     argument identifiers.
3499 :     * Changed the return type of TypeUtil.getFunction accordingly.
3500 :     * Type equality ignores the argument names.
3501 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
3502 :     if there is a mismatch.
3503 :    
3504 :     installation script:
3505 :     * attempts to use "curl" if available (unless "wget" is available as well)
3506 :    
3507 :     CM:
3508 :     * has an experimental implementation of "portable graphs" which I will
3509 :     soon propose as an implementation-independent library format
3510 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
3511 :    
3512 :     NLFFI-LIB:
3513 :     * some cleanup (all cosmetic)
3514 :    
3515 :     NLFFIGEN:
3516 :     * temporarily disabled the mechanism that suppresses ML output for
3517 :     C definitions whose identifiers start with an underscore character
3518 :     * generate val bindings for enum constants
3519 :     * user can request that only one style (light or heavy) is being used;
3520 :     default is to use both (command-line arguments: -heavy and -light)
3521 :     * fixed bug in handling of function types involving incomplete pointers
3522 :     * generate ML entry points that take record arguments (i.e., using
3523 :     named arguments) for C functions that have a prototype with named
3524 :     arguments
3525 :     (see changes to CKIT)
3526 :    
3527 :     ----------------------------------------------------------------------
3528 : leunga 972 Name: Allen Leung
3529 :     Date: 2001/10/27 20:34:00 EDT
3530 :     Tag: leunga-20011027-x86-fast-fp-call
3531 :     Description:
3532 :    
3533 :     Fixed the bug described in blume-20010920-slowfp.
3534 :    
3535 :     The fix involves
3536 :     1. generating FCOPYs in FSTP in ia32-svid
3537 :     2. marking a CALL with the appropriate annotation
3538 :    
3539 :     ----------------------------------------------------------------------
3540 : blume 961 Name: Matthias Blume
3541 :     Date: 2001/10/16 11:32:00 EDT
3542 :     Tag: blume-20011016-netbsd
3543 :     Description:
3544 :    
3545 :     Underscore patch from Chris Richards (fixing problem with compiling
3546 :     runtime system under recent NetBSD).
3547 :    
3548 :     ----------------------------------------------------------------------
3549 : george 959 Name: Allen Leung
3550 :     Date: 2001/10/12 17:18:32 EDT 2001
3551 :     Tag: leung-20011012-x86-printflowgraph
3552 :     Description:
3553 :    
3554 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
3555 :    
3556 :     ----------------------------------------------------------------------
3557 : george 952 Name: Lal George
3558 : george 958 Date: 2001/10/11 23:51:34 EDT
3559 :     Tag: george-20011011-too-many-instrs
3560 :     Description:
3561 :    
3562 :     The representation of a program point never expected to see more
3563 :     than 65536 instructions in a basic block!
3564 :    
3565 :     ----------------------------------------------------------------------
3566 :     Name: Lal George
3567 : george 952 Date: 2001/10/09 09:41:37 EDT
3568 :     Tag: george-20011008-mlrisc-labels
3569 :     Description:
3570 :    
3571 :     Changed the machine description files to support printing of
3572 :     local and global labels in assembly code, based on host assembler
3573 :     conventions.
3574 :    
3575 :     ----------------------------------------------------------------------
3576 : blume 916 Name: Matthias Blume
3577 : blume 939 Date: 2001/09/25 15:25:00 EDT
3578 :     Tag: blume-20010925-exninfo
3579 :     Description:
3580 :    
3581 :     I provided a non-hook implementation of exnName (at the toplevel) and
3582 :     made the "dummy" implementation of exnMessage (at the toplevel) more
3583 :     useful: if nothing gets "hooked in", then at least you are going to
3584 :     see the exception name and a message indicating why you don't see more.
3585 :    
3586 :     [For the time being, programs that need exnMessage and want to use
3587 :     ml-build should either use General.exnMessage (strongly recommended) or
3588 :     refer to structure General at some other point so that CM sees a
3589 :     static dependency.]
3590 :    
3591 :     [Similar remarks go for "print" and "use": If you want to use their
3592 :     functionality in stand-alone programs generated by ml-build, then use
3593 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
3594 :    
3595 :     ----------------------------------------------------------------------
3596 :     Name: Matthias Blume
3597 : blume 938 Date: 2001/09/20 17:28:00 EDT
3598 :     Tag: blume-20010920-slowfp
3599 :     Description:
3600 :    
3601 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
3602 :    
3603 :     ----------------------------------------------------------------------
3604 :     Name: Matthias Blume
3605 : blume 937 Date: 2001/09/20 17:20:00 EDT
3606 :     Tag: blume-20010920-canonicalpaths
3607 :     Description:
3608 :    
3609 :     0. Updated the BOOT file (something that I forgot to do earlier).
3610 :    
3611 :     1. Small internal change to CM so that it avoids "/../" in filenames
3612 :     as much as possible (but only where it is safe).
3613 :    
3614 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
3615 :     that arguments that contain delimiters are passed through correctly.
3616 :     This change also means that all "special" arguments of the form
3617 :     @SMLxxx... must come first.
3618 :    
3619 :     3. Changed install script to put relative anchor names for tool commands
3620 :     into pathconfig.
3621 :    
3622 :     ----------------------------------------------------------------------
3623 :     Name: Matthias Blume
3624 : blume 932 Date: 2001/09/18 15:35:00 EDT
3625 :     Tag: blume-20010918-readme11036
3626 :     Description:
3627 :    
3628 :     Added README files.
3629 :    
3630 :     ----------------------------------------------------------------------
3631 :     Name: Matthias Blume
3632 : blume 929 Date: 2001/09/18 11:45:00 EDT
3633 :     Tag: Release_110_36 (retag)
3634 :     Description:
3635 :    
3636 :     Fixed mistake in config/preloads. Retagged as 110.36.
3637 :    
3638 :     ----------------------------------------------------------------------
3639 :     Name: Matthias Blume
3640 : blume 928 Date: 2001/09/18 09:40:00 EDT
3641 : blume 929 Tag: Release_110_36_orig (tag changed)
3642 : blume 928 Description:
3643 :    
3644 :     New version (110.36). New bootfiles.
3645 :    
3646 :     ----------------------------------------------------------------------
3647 :     Name: Matthias Blume
3648 : blume 927 Date: 2001/09/14 16:15:00 EDT
3649 :     Tag: blume-20010914-x86fastfp
3650 :     Description:
3651 :    
3652 :     John committed some changes that Allen made, in particular a (hopefully)
3653 :     correctly working version of the x86-fp module.
3654 :    
3655 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
3656 :     flag to "true". Everything seems to compile to a fixpoint ok, and
3657 :     "mandelbrot" speeds up by about 15%.
3658 :    
3659 :     ----------------------------------------------------------------------
3660 :     Name: Matthias Blume
3661 : blume 923 Date: 2001/09/13 11:20:00 EDT
3662 :     Tag: blume-20010913-minimal
3663 :     Description:
3664 :    
3665 :     1. Stefan Monnier's patch to fix a miscompilation problem that
3666 :     was brought to light by John Reppy's work on Moby.
3667 :    
3668 :     2. Implemented a minimal "structure Compiler" that contains just
3669 :     "version" and "architecture". The minimal version will be
3670 :     available when the full version is not. This is for backward-
3671 :     compatibility with code that wants to test Compiler.version.
3672 :    
3673 :     ----------------------------------------------------------------------
3674 :     Name: Matthias Blume
3675 : blume 920 Date: 2001/08/28 14:03:00 EDT
3676 :     Tag: blume-20010828-ml-lex
3677 :     Description:
3678 :    
3679 :     Fix for bug 1581, received from Neophytos Michael.
3680 :    
3681 :     ----------------------------------------------------------------------
3682 :     Name: Matthias Blume
3683 : blume 918 Date: 2001/08/27 11:20:00 EDT
3684 :     Tag: blume-20010827-readme11035
3685 :     Description:
3686 :    
3687 :     Fleshed out the README file for 110.35.
3688 :    
3689 :     ----------------------------------------------------------------------
3690 :     Name: Matthias Blume
3691 : blume 916 Date: 2001/08/24 17:10:00 EDT
3692 :     Tag: Release_110_35
3693 :     Description:
3694 :    
3695 :     New version number (110.35). New bootfiles.
3696 :    
3697 :     ----------------------------------------------------------------------
3698 : george 915 Name: Lal George
3699 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
3700 :     Tag: george-20010824-MLRISC-graphs
3701 :     Description:
3702 :    
3703 :     removed clusters from MLRISC completely and replaced with graphs.
3704 :    
3705 :     ----------------------------------------------------------------------
3706 :     Name: Matthias Blume
3707 : blume 905 Date: 2001/08/23 17:50:00 EDT
3708 :     Tag: blume-20010823-toplevel
3709 :     Description:
3710 :    
3711 :     - some reorganization of the code that implements various kinds of
3712 :     environments in the compiler (static, dynamic, symbolic, combined)
3713 :     - re-implemented the EnvRef module so that evalStream works properly
3714 :     (if the stream contains references to "use", "CM.make", etc.)
3715 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
3716 :    
3717 :     ----------------------------------------------------------------------
3718 :     Name: Matthias Blume
3719 : blume 904 Date: 2001/08/20 15:50 EDT
3720 :     Tag: blume20010820-slipup
3721 :     Description:
3722 :    
3723 :     I forgot to commit a few files. Here they are...
3724 :    
3725 :     ----------------------------------------------------------------------
3726 :     Name: Matthias Blume
3727 : blume 903 Date: 2001/08/20 15:35:00 EDT
3728 :     Tag: blume-20010820-debugprof
3729 :     Description:
3730 :    
3731 :     !!!! NEW BOOTFILES !!!!
3732 :    
3733 :     This is another round of reorganizing the compiler sources. This
3734 :     time the main goal was to factor out all the "instrumentation"
3735 :     passes (for profiling and backtracing) into their own library.
3736 :     The difficulty was to do it in such a way that it does not depend
3737 :     on elaborate.cm but only on elabdata.cm.
3738 :    
3739 :     Therefore there have been further changes to both elaborate.cm and
3740 :     elabdata.cm -- more "generic" things have been moved from the former
3741 :     to the latter. As a result, I was forced to split the assignment
3742 :     of numbers indicating "primtyc"s into two portions: SML-generic and
3743 :     SML/NJ-specific. Since it would have been awkward to maintain,
3744 :     I bit the bullet and actually _changed_ the mapping between these
3745 :     numbers and primtycs. The bottom line of this is that you need
3746 :     a new set of bin- and bootfiles.
3747 :    
3748 :     I have built new bootfiles for all architectures, so doing a fresh
3749 :     checkout and config/install.sh should be all you need.
3750 :    
3751 :     The newly created library's name is
3752 :    
3753 :     $smlnj/viscomp/debugprof.cm
3754 :    
3755 :     and its sources live under
3756 :    
3757 :     src/compiler/DebugProf
3758 :    
3759 :     ----------------------------------------------------------------------
3760 :     Name: Matthias Blume
3761 : blume 902 Date: 2001/08/15 17:15:00 EDT
3762 :     Tag: blume-20010815-compreorg
3763 :     Description:
3764 :    
3765 :     This is a first cut at reorganizing the CM libraries that make up the
3766 :     core of the compiler. The idea is to separate out pieces that could
3767 :     be used independently by tools, e.g., the parser, the typechecker, etc.
3768 :    
3769 :     The current status is a step in this direction, but it is not quite
3770 :     satisfactory yet. Expect more changes in the future.
3771 :    
3772 :     Here is the current (new) organization...
3773 :    
3774 :     What used to be $smlnj/viscomp/core.cm is now divided into
3775 :     six CM libraries:
3776 :    
3777 :     $smlnj/viscomp/basics.cm
3778 :     /parser.cm
3779 :     /elabdata.cm
3780 :     /elaborate.cm
3781 :     /execute.cm
3782 :     /core.cm
3783 :    
3784 :     The CM files for these libraries live under src/system/smlnj/viscomp.
3785 :     All these libraries are proxy libraries that contain precisely
3786 :     one CM library component. Here are the locations of the components
3787 :     (all within the src/compiler tree):
3788 :    
3789 :     Basics/basics.cm
3790 :     Parse/parser.cm
3791 :     ElabData/elabdata.cm
3792 :     Elaborator/elaborate.cm
3793 :     Execution/execute.cm
3794 :     core.cm
3795 :    
3796 :     [This organization is the same that has been used already
3797 :     for a while for the architecture-specific parts of the visible
3798 :     compiler and for the old version of core.cm.]
3799 :    
3800 :     As you will notice, many source files have been moved from their
3801 :     respective original locations to a new home in one of the above
3802 :     subtrees.
3803 :    
3804 :     The division of labor between the new libraries is the following:
3805 :    
3806 :     basics.cm:
3807 :     - Simple, basic definitions that pertain to many (or all) of
3808 :     the other libraries.
3809 :     parser.cm:
3810 :     - The SML parser, producing output of type Ast.dec.
3811 :     - The type family for Ast is also defined and exported here.
3812 :     elabdata.cm:
3813 :     - The datatypes that describe input and output of the elaborator.
3814 :     This includes types, absyn, and static environments.
3815 :     elaborator.cm:
3816 :     - The SML/NJ type checker and elaborator.
3817 :     This maps an Ast.dec (with a given static environment) to
3818 :     an Absyn.dec (with a new static environment).
3819 :     - This libraries implements certain modules that used to be
3820 :     structures as functors (to remove dependencies on FLINT).
3821 :     execute.cm:
3822 :     - Everything having to do with executing binary code objects.
3823 :     - Dynamic environments.
3824 :     core.cm:
3825 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
3826 :     - Top-level modules.
3827 :     - FLINT (this should eventually become its own library)
3828 :    
3829 :     Notes:
3830 :    
3831 :     I am not 100% happy with the way I separated the elaborator (and its
3832 :     data structures) from FLINT. Two instances of the same problem:
3833 :    
3834 :     1. Data structures contain certain fields that carry FLINT-specific
3835 :     information. I hacked around this using exn and the property list
3836 :     module from smlnj-lib. But the fact that there are middle-end
3837 :     specific fields around at all is a bit annoying.
3838 :    
3839 :     2. The elaborator calculates certain FLINT-related information. I tried
3840 :     to make this as abstract as I could using functorization, but, again,
3841 :     the fact that the elaborator has to perform calculations on behalf
3842 :     of the middle-end at all is not nice.
3843 :    
3844 :     3. Having to used exn and property lists is unfortunate because it
3845 :     weakens type checking. The other alternative (parameterizing
3846 :     nearly *everything*) is not appealing, though.
3847 :    
3848 :     I removed the "rebinding =" warning hack because due to the new organization
3849 :     it was awkward to maintain it. As a result, the compiler now issues some of
3850 :     these warnings when compiling init.cmi during bootstrap compilation. On
3851 :     the plus side, you also get a warning when you do, for example:
3852 :     val op = = Int32.+
3853 :     which was not the case up to now.
3854 :    
3855 :     I placed "assign" and "deref" into the _Core structure so that the
3856 :     code that deals with the "lazy" keyword can find them there. This
3857 :     removes the need for having access to the primitive environment
3858 :     during elaboration.
3859 :    
3860 :     ----------------------------------------------------------------------
3861 :     Name: Matthias Blume
3862 : blume 898 Date: 2001/08/13
3863 :     Tag: blume-20010813-closures
3864 :     Description:
3865 :    
3866 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
3867 :     performance of certain loops by avoiding needless closure allocation.
3868 :    
3869 :     ----------------------------------------------------------------------
3870 : george 890 Name: Lal George
3871 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
3872 :     Tag: george-20010731-x86-fmalloc
3873 :     Description: Fixed bug in x86 calls
3874 :    
3875 :     There was a bug where call instructions would mysteriously
3876 :     vanish. The call instruction had to be one that returned
3877 :     a floating point value.
3878 :    
3879 :     ----------------------------------------------------------------------
3880 :     Name: Lal George
3881 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
3882 :     Tag: george-20010719-simple-cells
3883 :     Description:
3884 :    
3885 :     I have dramatically simplified the interface for CELLS in MLRISC.
3886 :    
3887 :     In summary, the cells interface is broken up into three parts:
3888 :    
3889 :     1. CellsBasis : CELLS_BASIS
3890 :    
3891 :     CellsBasis is a top level structure and common for all
3892 :     architectures. it contains the definitions of basic datatypes
3893 :     and utility functions over these types.
3894 :    
3895 :     2. functor Cells() : CELLS
3896 :    
3897 :     Cells generates an interface for CELLS that incorporates the
3898 :     specific resources on the target architecture, such as the
3899 :     presence of special register classes, their number and size,
3900 :     and various useful substructures.
3901 :    
3902 :     3. <ARCH>CELLS
3903 :    
3904 :     e.g. SparcCells: SPARCCELLS
3905 :    
3906 :     <ARCH>CELLS usually contains additional bindings for special
3907 :     registers on the architecture, such as:
3908 :    
3909 :     val r0 : cell (* register zero *)
3910 :     val y : cell (* Y register *)
3911 :     val psr : cell (* processor status register *)
3912 :     ...
3913 :    
3914 :     The structure returned by applying the Cells functor is opened
3915 :     in this interface.
3916 :    
3917 :     The main implication of all this is that the datatypes for cells is
3918 :     split between CellsBasis and CELLS -- a fairly simple change for user
3919 :     code.
3920 :    
3921 :     In the old scheme the CELLS interface had a definitional binding of
3922 :     the form:
3923 :    
3924 :     signature CELLS = sig
3925 :    
3926 :     structure CellsBasis = CellsBasis
3927 :    
3928 :     ...
3929 :    
3930 :     end
3931 :    
3932 :     With all the sharing constraints that goes on in MLRISC, this old
3933 :     design quickly leads to errors such as:
3934 :    
3935 :     "structure definition spec inside of sharing ... "
3936 :    
3937 :    
3938 :     and appears to require an unacceptable amount of sharing and where
3939 :     constraint hackery.
3940 :    
3941 :     I think this error message (the interaction of definitional specs and
3942 :     sharing) requires more explanation on our web page.
3943 :    
3944 :     ----------------------------------------------------------------------
3945 : blume 826 Name: Matthias Blume
3946 : blume 879 Date: 2001/07/19 15:00:00 EDT
3947 :     Tag: blume-20010719-libreorg
3948 :     Description:
3949 :    
3950 :     This update puts together a fairly extensive but straightforward change
3951 :     to the way the libraries that implement the interactive system are
3952 :     organized:
3953 :    
3954 :     The biggest change is the elimination of structure Compiler. As a
3955 :     replacement for this structure, there is now a CM library
3956 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
3957 :     that exports all the substructures of the original structure Compiler
3958 :     directly. So instead of saying Compiler.Foo.bar one now simply
3959 :     says Foo.bar. (The CM libraries actually export a collection of
3960 :     structures that is richer than the collection of substructures of
3961 :     structure Compiler.)
3962 :    
3963 :     To make the transition smooth, there is a separate library called
3964 :     $smlnj/compiler/compiler.cm which puts together and exports the
3965 :     original structure Compiler (or at least something very close to it).
3966 :    
3967 :     There are five members of the original structure Compiler
3968 :     that are not exported directly but which instead became members
3969 :     of a new structure Backend (described by signature BACKEND). These are:
3970 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
3971 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
3972 :     architecture (: string).
3973 :    
3974 :     Structure Compiler.Version has become structure CompilerVersion.
3975 :    
3976 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
3977 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
3978 :     or x86, respectively.
3979 :     Each of these exports the same frontend structures that
3980 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
3981 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
3982 :     Hppa, PPC, Sparc, or X86, respectively.
3983 :    
3984 :     Library $smlnj/compiler/all.cm exports the union of the exports of
3985 :     $smlnj/compiler/<arch>.cm
3986 :    
3987 :     There are no structures <Arch>Compiler anymore, use
3988 :     $smlnj/compiler/<arch>.cm instead.
3989 :    
3990 :     Library host-compiler-0.cm is gone. Instead, the internal library
3991 :     that instantiates CM is now called cm0.cm. Selection of the host
3992 :     compiler (backend) is no longer done here but. (Responsibility for it
3993 :     now lies with $smlnj/compiler/current.cm. This seems to be more
3994 :     logical.)
3995 :    
3996 :     Many individual files have been moved or renamed. Some files have
3997 :     been split into multiple files, and some "dead" files have been deleted.
3998 :    
3999 :     Aside from these changes to library organization, there are also changes
4000 :     to the way the code itself is organized:
4001 :    
4002 :     Structure Binfile has been re-implemented in such a way that it no
4003 :     longer needs any knowledge of the compiler. It exclusively deals
4004 :     with the details of binfile layout. It no longer invokes the
4005 :     compiler (for the purpose of creating new prospective binfile
4006 :     content), and it no longer has any knowledge of how to interpret
4007 :     pickles.
4008 :    
4009 :     Structure Compile (: COMPILE) has been stripped down to the bare
4010 :     essentials of compilation. It no longer deals with linking/execution.
4011 :     The interface has been cleaned up considerably.
4012 :    
4013 :     Utility routines for dealing with linking and execution have been
4014 :     moved into their own substructures.
4015 :    
4016 :     (The ultimate goal of these changes is to provide a light-weight
4017 :     binfile loader/linker (at least for, e.g., stable libraries) that
4018 :     does not require CM or the compiler to be present.)
4019 :    
4020 :     CM documentation has been updated to reflect the changes to library
4021 :     organization.
4022 :    
4023 :     ----------------------------------------------------------------------
4024 :     Name: Matthias Blume
4025 : blume 875 Date: 2001/07/10 17:30:00 EDT
4026 :     Tag: Release_110_34
4027 :     Description:
4028 :    
4029 : blume 876 Minor tweak to 110.34 (re-tagged):
4030 :    
4031 :     - README.html file added to CVS repository
4032 :     - runtime compiles properly under FreeBSD 3.X and 4.X
4033 :    
4034 :     ----------------------------------------------------------------------
4035 :     Name: Matthias Blume
4036 :     Date: 2001/07/10 17:30:00 EDT
4037 :     Tag: Release_110_34
4038 :     Description:
4039 :    
4040 : blume 875 New version number (110.34). New bootfiles.
4041 :    
4042 :     ----------------------------------------------------------------------
4043 :     Name: Matthias Blume
4044 : blume 874 Date: 2001/07/09 16:00:00 EDT
4045 :     Tag: blume-20010709-more-varargs
4046 :     Description:
4047 :    
4048 :     I changed the handling of varargs in ml-nlffigen again:
4049 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
4050 :    
4051 :     The immediate effect is that you can actually call a varargs function
4052 :     from ML -- but you can't actually supply any arguments beyond the ones
4053 :     specified explicitly. (For example, you can call printf with its format
4054 :     string, but you cannot pass additional arguments.)
4055 :    
4056 :     This behavior is only marginally more useful than the one before, but
4057 :     it has the advantage that a function or, more importantly, a function
4058 :     type never gets dropped on the floor, thus avoiding follow-up problems with
4059 :     other types that refer to the offending one.
4060 :    
4061 :     ----------------------------------------------------------------------
4062 :     Name: Matthias Blume
4063 : blume 873 Date: 2001/07/09 11:25:00 EDT
4064 :     Tag: blume-20010709-varargs
4065 :     Description:
4066 :    
4067 :     1. ckit-lib.cm now exports structure Error
4068 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
4069 :     with a warning accompanied by a source location. Moreover, it
4070 :     merely skips the offending function or type and proceeds with the
4071 :     rest of its work.u As a result, one can safely feed C code containing
4072 :     "..." to ml-nlffigen.
4073 :     3. There are some internal improvements to CM, providing slightly
4074 :     more general string substitutions in the tools subsystem.
4075 :    
4076 :     ----------------------------------------------------------------------
4077 :     Name: Matthias Blume
4078 : blume 854 Date: 2001/06/27 15:10:00 EDT
4079 :     Tag: blume-20010627-concur
4080 :     Description:
4081 :    
4082 :     Fixed a small bug in CM's handling of parallel compilation.
4083 :     (You could observe the bug by Control-C-interrupting an ordinary
4084 :     CMB.make or CM.stabilize and then attaching some compile servers.
4085 :     The result was that all of a sudden the previously interrupted
4086 :     compilation would continue on its own. This was because of
4087 :     an over-optimization: CM did not bother to clean out certain queues
4088 :     when no servers were attached "anyway", resulting in the contents
4089 :     of these queues to grab control when new servers did get attached.)
4090 :    
4091 :     There is also another minor update to the CM manual.
4092 :    
4093 :     ----------------------------------------------------------------------
4094 :     Name: Matthias Blume
4095 : blume 853 Date: 2001/06/26 16:15:00 EDT
4096 :     Tag: blume-20010626-cmdoc
4097 :     Description:
4098 :    
4099 :     Minor typo fixed in CM manual (syntax diagram for libraries).
4100 :    
4101 :     ----------------------------------------------------------------------
4102 :     Name: Matthias Blume
4103 : blume 852 Date: 2001/06/25 22:55:00 EDT
4104 :     Tag: blume-20010625-x86pc
4105 :     Description:
4106 :    
4107 :     Fixed a nasty bug in the X86 assembly code that caused signal
4108 :     handlers to fail (crash) randomly.
4109 :    
4110 :     ----------------------------------------------------------------------
4111 :     Name: Matthias Blume
4112 : blume 846 Date: 2001/06/25 12:05:00 EDT
4113 :     Tag: blume-20010625-nlffigen
4114 :     Description:
4115 :    
4116 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
4117 :     Nick Carter <nbc@andrew.cmu.edu>.
4118 :    
4119 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
4120 :     2. Default names for generated files are now derived from the name of
4121 :     the C file *without its directory*. In particular, this causes generated
4122 :     files to be placed locally even if the C file is in some system directory.
4123 :     3. Default names for generated signatures and structures are also derived
4124 :     from the C file name without its directory. This avoids silly things
4125 :     like "structure GL/GL".
4126 :     (Other silly names are still possible because ml-nlffigen does not do
4127 : blume 847 a thorough check of whether generated names are legal ML identifiers.
4128 :     When in doubt, use command line arguments to force particular names.)
4129 : blume 846
4130 :     ----------------------------------------------------------------------
4131 :     Name: Matthias Blume
4132 : blume 845 Date: 2001/06/21 12:25:00 EDT
4133 :     Tag: blume-20010621-eXene
4134 :     Description:
4135 :    
4136 :     eXene now compiles and (sort of) works again.
4137 :    
4138 :     The library name (for version > 110.33) is $/eXene.cm.
4139 :    
4140 :     I also added an new example in src/eXene/examples/nbody. See the
4141 :     README file there for details.
4142 :    
4143 :     ----------------------------------------------------------------------
4144 :     Name: Matthias Blume
4145 : blume 844 Date: 2001/06/20 16:40:00 EDT
4146 :     Tag: blume-20010620-cml
4147 :     Description:
4148 :    
4149 :     CML now compiles and works again.
4150 :    
4151 :     Libraries (for version > 110.33):
4152 :    
4153 :     $cml/cml.cm Main CML library.
4154 :     $cml/basis.cm CML's version of $/basis.cm.
4155 :     $cml/cml-internal.cm Internal helper library.
4156 :     $cml/core-cml.cm Internal helper library.
4157 :     $cml-lib/trace-cml.cm Tracing facility.
4158 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
4159 :    
4160 :     The installer (config/install.sh) has been taught how to properly
4161 :     install this stuff.
4162 :    
4163 :     ----------------------------------------------------------------------
4164 :     Name: Matthias Blume
4165 : blume 843 Date: 2001/06/19 17:55:00 EDT
4166 :     Tag: blume-20010619-instantiate
4167 :     Description:
4168 :    
4169 :     This un-breaks the fix for bug 1432.
4170 :     (The bug was originally fixed in 110.9 but I broke it again some
4171 :     time after that.)
4172 :    
4173 :     ----------------------------------------------------------------------
4174 :     Name: Matthias Blume
4175 : blume 842 Date: 2001/06/19 17:25:00 EDT
4176 :     Tag: blume-20010619-signals
4177 :     Description:
4178 :    
4179 :     This should (hopefully) fix the long-standing signal handling bug.
4180 :     (The runtime system was constructing a continuation record with an
4181 :     incorrect descriptor which would cause the GC to drop data on the floor...)
4182 :    
4183 :     ----------------------------------------------------------------------
4184 :     Name: Matthias Blume
4185 : blume 840 Date: 2001/06/15 15:05:00 EDT
4186 : blume 841 Tag: blume-20010615-moresparc
4187 :     Description:
4188 :    
4189 :     Here is a short late-hour update related to Sparc c-calls:
4190 :    
4191 :     -- made handling of double-word arguments a bit smarter
4192 :    
4193 :     -- instruction selection phase tries to collapse certain clumsily
4194 :     constructed ML-Trees; typical example:
4195 :    
4196 :     ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
4197 :    
4198 :     This currently has no further impact on SML/NJ since mlriscGen does
4199 :     not seem to generate such patterns in the first place, and c-calls
4200 :     (which did generate them in the beginning) has meanwhile been fixed
4201 :     so as to avoid them as well.
4202 :    
4203 :     ----------------------------------------------------------------------
4204 :     Name: Matthias Blume
4205 :     Date: 2001/06/15 15:05:00 EDT
4206 : blume 840 Tag: blume-20010615-sparc
4207 :     Description:
4208 :    
4209 :     The purpose of this update is to provide an implementation of NLFFI
4210 :     on Sparc machines.
4211 :    
4212 :     Here are the changes in detail:
4213 :    
4214 :     * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
4215 :     the Sparc implementation of the c-calls API.
4216 :     * The Sparc backend of SML/NJ has been modified to uniformely use %fp
4217 :     for accessing the ML frame. Thus, we have a real frame pointer and
4218 :     can freely modify %sp without need for an omit-frame-ptr phase.
4219 :     The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
4220 :     this case.
4221 :     * ml-nlffigen has been taught to produce code for different architectures
4222 :     and calling conventions.
4223 :     * In a way similar to what was done in the x86 case, the Sparc
4224 :     backend uses its own specific extension to mltree. (For example,
4225 :     it needs to be able to generate UNIMP instructions which are part
4226 :     of the calling convention.)
4227 :     * ml-nlffi-lib was reorganized to make it more modular (in particular,
4228 :     to make it easier to plug in new machine- and os-dependent parts).
4229 :    
4230 :     There are some other fairly unrelated bug fixes and cleanups as well:
4231 :    
4232 :     * I further hacked the .cm files for MLRISC tools (like MDLGen) so
4233 :     that they properly share their libraries with existing SML/NJ libraries.
4234 :     * I fixed a minor cosmetic bug in CM, supressing certain spurious
4235 :     follow-up error messages.
4236 :     * Updates to CM/CMB documentation.
4237 :    
4238 :     TODO items:
4239 :    
4240 :     * MLRISC should use a different register as its asmTemp on the Sparc.
4241 :     (The current %o2 is a really bad choice because it is part of the
4242 :     calling conventions, so things might interfere in unexpected ways.)
4243 :    
4244 :     ----------------------------------------------------------------------
4245 :     Name: Matthias Blume
4246 : blume 839 Date: 2001/06/07
4247 :     Tag: blume-20010607-calls
4248 :     Description:
4249 :    
4250 :     A number of internal changes related to C calls and calling conventions:
4251 :    
4252 :     1. ML-Tree CALL statements now carry a "pops" field. It indicates the
4253 :     number of bytes popped implicitly (by the callee). In most cases
4254 :     this field is 0 but on x86/win32 it is some non-zero value. This
4255 :     is information provided for the benefit of the "omit-frameptr" pass.
4256 :     2. The CALL instruction on the x86 carries a similar "pops" field.
4257 :     The instruction selection phase copies its value from the ML-Tree
4258 :     CALL statement.
4259 :     3. On all other architectures, the instruction selection phase checks
4260 :     whether "pops=0" and complains if not.
4261 :     4. The c-calls implementation for x86 now accepts two calling conventions:
4262 :     "ccall" and "stdcall". When "ccall" is selected, the caller cleans
4263 :     up after the call and pops is set to 0. For "stdcall", the caller
4264 :     does nothing, leaving the cleanup to the callee; pops is set to
4265 :     the number of bytes that were pushed onto the stack.
4266 :     5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
4267 :     distinguish between "ccall" and "stdcall".
4268 :     6. The UNIMP instruction has been added to the supported Sparc instruction
4269 :     set. (This is needed for implementing the official C calling convention
4270 :     on this architecture.)
4271 :     7. I fixed some of the .cm files under src/MLRISC/Tools to make them
4272 :     work with the latest CM.
4273 :    
4274 :     ----------------------------------------------------------------------
4275 :     Name: Matthias Blume
4276 : blume 838 Date: 2001/06/05 15:10:00 EDT
4277 :     Tag: blume-20010605-cm-index
4278 :     Description:
4279 :    
4280 :     0. The "lambdasplit" parameter for class "sml" in CM has been documented.
4281 :    
4282 :     1. CM can now generate "index files". These are human-readable files
4283 :     that list on a per-.cm-file basis each toplevel symbol defined or
4284 :     imported. The location of the index file for
4285 :     <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
4286 :     To enable index-file generation, set CM.Control.generate_index to true
4287 :     or export an environment-symbol: export CM_GENERATE_INDEX=true.
4288 :    
4289 :     The CM manual has been updated accordingly.
4290 :    
4291 :     2. I made some slight modifications to the c-calls API in MLRISC.
4292 :    
4293 :     a) There is now a callback to support saving/restoring of
4294 :     dedicated but caller-save registers around the actual call
4295 :     instruction.
4296 :