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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 1480 Name:
11 :     Date: yyyy/mm/dd
12 :     Tag: <post-commit CVS tag>
13 :     Description:
14 :    
15 :     ----------------------------------------------------------------------
16 : allenleung 1539 Name: Allen Leung (leunga (at) reservoir (dot) com)
17 :     Date: 2004/07/13 15:04:00 EST
18 :     Tag: leunga-110_46_1-ppc-lwarx
19 :     Description:
20 :    
21 :     Added the two instructions LWARX and STWCX to the PowerPC
22 :     instruction set.
23 :    
24 :     A (untested) rewrite of loop-structure.sml. The old version
25 :     is completely broken.
26 :    
27 :     ----------------------------------------------------------------------
28 : mblume 1479 Name: Matthias Blume (blume (at) tti - c (dot) org)
29 : mblume 1537 Date: 2004/07/13 13:50:00 CDT
30 :     Tag: blume-20040713-nlffi
31 :     Description:
32 :    
33 :     - use paramAlloc to report c-calls with too many arguments
34 :     (for PPC version where parameter area is pre-allocated)
35 :     - added ccall_maxargspace to machspec (to implement the above)
36 :     - made "make" commend in CM's "make" tool configurable
37 :     - added option (default: on) for passing the name of the SML/NJ's "bin"
38 :     directory to "make"; the call looks like this:
39 :    
40 :     make <options> SMLNJ_BINDIR=<dir> <target>
41 :    
42 :     This can be used by the Makefile to, e.g., pick the "right" version
43 :     of ml-nlffigen.
44 :     - minor code tweaks
45 :    
46 :     ----------------------------------------------------------------------
47 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
48 : mblume 1532 Date: 2004/07/12 22:50:00 CDT
49 :     Tag: blume-110_46_1-macosx-nlffi
50 :     Description:
51 :    
52 :     NLFFI under Mac OS X now working (sort of). This is largely untested,
53 :     though.
54 :    
55 :     Note: 1. You have to make a new, clean build of the runtime system.
56 :     2. There are new BOOTFILES, you have to use them!
57 :     (Doing the bootstrap process yourself would be *very* painful!
58 :     If you absolutely have to do it, build the system under
59 :     a different architecture and then cross-compile.)
60 :    
61 :     Version bumped to 110.46.1 to account for runtime data format changes.
62 :    
63 :     ----------------------------------------------------------------------
64 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
65 : mblume 1515 Date: 2004/06/18 14:30:00 CDT
66 :     Tag: blume-20040618-unix
67 :     Description:
68 :    
69 :     Changed the implementation of structure Unix so that the same stream
70 :     is returned every time one of the {text,bin}{In,Out}streamOf functions
71 :     is invoked on the same proc. This is not what the spec currently
72 :     says -- although IMO it arguably should. (See discussion below.)
73 :    
74 :     ----------------------------------------------------------------------
75 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
76 : mblume 1507 Date: 2004/06/17 18:15:00 CDT
77 :     Tag: Release_110_46
78 :     Description:
79 :    
80 :     New working version (110.46). NEW BOOTFILES!
81 :    
82 :     ----------------------------------------------------------------------
83 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
84 : mblume 1506 Date: 2004/06/17 17:20:00 CDT
85 :     Tag: blume-20040617-timer-unix
86 :     Description:
87 :    
88 :     Changed the interface of structures Timer and Unix to match the most
89 :     recent Basis spec.
90 :    
91 :     In the case of Unix there still seems to be an open/weird issue:
92 :    
93 :     The {text,bin}{In,Out}streamOf functions are supposed to create
94 :     fresh streams whenever they are called -- as opposed to have them
95 :     return the same stream every time. This design is supposed to
96 :     prevent space leaks caused by proc values hanging on to streams.
97 :    
98 :     The reap function, on the other hand, is supposed to close the
99 :     streams. This cannot be done without having a handle on the
100 :     stream in proc after all...
101 :    
102 :     I took the liberty to implement the following stopgap solution:
103 :    
104 :     The proc value hangs on to the most recently created stream(s).
105 :     Reap closes those. If either or both of the two streams hadn't
106 :     been created at all yet, then reap will close the corresponding
107 :     file descriptors directly.
108 :    
109 :     PS: I don't understand the original space leak argument anymore. If
110 :     a proc hangs on to the imperative stream, then I/O operations on those
111 :     will advance the state of the cached stream and avoid the space leak.
112 :    
113 :     ----------------------------------------------------------------------
114 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
115 : mblume 1500 Date: 2004/05/28 16:45:00 CDT
116 :     Tag: blume-20040528-basis
117 :     Description:
118 :    
119 :     Added signature PACK_REAL and exported functor PrimIO.
120 :    
121 :     ----------------------------------------------------------------------
122 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
123 : mblume 1498 Date: 2004/05/25 16:00:00 CDT
124 :     Tag: blume-20040525-group-owner
125 :     Description:
126 :    
127 :     CM now ignores (but still accepts) the "owner" information in group
128 :     descriptions. The owner of a group is its next enclosing
129 :     library. Each group must have a unique owner. (There is a virtual
130 : mblume 1505 "toplevel" library that owns groups which are not nested within a real
131 : mblume 1498 library.) Previously, each group had to explicitly declare its owner,
132 :     and CM would check that such a declaration is correct. The new scheme
133 :     is to have CM check that for each group there is precisely one owning
134 :     library.
135 :    
136 :     The advantage of the new scheme is that the programmer no longer needs
137 :     to maintain the somewhat annoying owner information. The downside is
138 :     that CM cannot enforce the ownership rule across multiple runs of
139 :     CM.make. Fortunately, enclosing the same group in two different
140 :     libraries A and B which are not part of the same program does not
141 :     cause real problems.
142 :    
143 :     ----------------------------------------------------------------------
144 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
145 : mblume 1496 Date: 2004/05/20 16:00:00 CDT
146 :     Tag: blume-20040520-win32
147 :     Description:
148 :    
149 :     Made the win32 version work again. (Strangely, a misplaced comma had
150 :     slipped into win32-process.c which prevented the runtime from being
151 :     compiled correctly.)
152 :    
153 :     Also, included a minor addition to ml-build.bat analogous to what was
154 :     done in blume-20040519-ml-build.
155 :    
156 :     ----------------------------------------------------------------------
157 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
158 : mblume 1494 Date: 2004/05/19 22:10:00 CDT
159 :     Tag: blume-20040519-ml-build
160 :     Description:
161 :    
162 :     Arranged for ml-build to clean up after itself a little bit better.
163 :     The script generates a temporary SML source file and compiles it using
164 :     CM, so CM generates metadata (GUID, SKEL, objectfile) for it. It now
165 :     gets rid of those at the end, so they don't accumulate under .cm.
166 :    
167 :     This required a minor change to install.sh because the name of the
168 :     metadata directory (default: .cm) is actually configurable at
169 :     installation time.
170 :    
171 :     ----------------------------------------------------------------------
172 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
173 : mblume 1491 Date: 2004/05/18 15:50:00 CDT
174 :     Tag: blume-20040518-mkreader
175 :     Description:
176 :    
177 :     Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
178 :     implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
179 :    
180 :     ----------------------------------------------------------------------
181 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
182 : mblume 1489 Date: 2004/05/11 14:35:00 CDT
183 :     Tag: blume-20040511-win32sock
184 :     Description:
185 :    
186 :     Added previously missing support for many socket-related functions
187 :     under win32. Thanks to David Hansel <hansel@reactive-systems.com>
188 :     for the voluminous patch!
189 :    
190 :     (I have not tested this patch under win32 yet.)
191 :    
192 : mblume 1490 Here is David's e-mail:
193 :    
194 :     Hi,
195 :    
196 :     Attached to this email you find a diff against sml/nj 110.45
197 :     that will enable socket support under Windows.
198 :    
199 :     To apply the patch (using unix or cygwin)
200 :     1) gunzip runtime.diff.gz
201 :     2) "cd" into "src/runtime" in the source tree of a fresh
202 :     110.45 installation.
203 :     3) patch -p 1 < [your/path/to]runtime.diff
204 :    
205 :     The code compiles fine but has NOT yet been extensively tested.
206 :     I only ran a few tests for basic socket client functionality
207 :     (which worked fine). Especially the functions that use ioctl
208 :     are not tested at all and might not work (see below).
209 :    
210 :     I implemented this since we want to move to a newer version of sml/nj
211 :     but need socket support in order to use it. This is the first time I
212 :     even had a look at the sml/nj source, so please review my changes
213 :     before making this part of the distribution! Here are a few issues
214 :     that I think might be better for someone to solve who is more
215 :     familiar with the sml/nj source (and socket programming):
216 :    
217 :     - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
218 :     exception since I could not figure out what the windows equivalent
219 :     of these functions is
220 :    
221 :     - In sockets-osdep.h there are a some #include statements that are
222 :     only used in a few files that include sockets-osdep.h
223 :    
224 :     - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
225 :     does not process its return value since I don't know how to
226 :     report an error upwards.
227 :    
228 :     - It would probably be good to have a call to WSACleanup() when
229 :     the library is unloaded (if there is such a possibility).
230 :     Otherwise I think Windows will take care of this automatically
231 :     when the process finishes.
232 :    
233 :     - I used ioctlsocket() as a replacement for ioctl() but I have
234 :     no idea if that is actually the proper replacement on Windows.
235 :    
236 :     - All these issues are marked in the code by "FIXME" comments.
237 :    
238 :     We use sml/nj extensively in our products and are quite happy
239 :     with it. I hope this contribution will help you.
240 :    
241 :     Keep up the good work!
242 :    
243 :     David
244 :    
245 : mblume 1489 ----------------------------------------------------------------------
246 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
247 : mblume 1488 Date: 2004/05/11 14:20:00 CDT
248 :     Tag: blume-20040511-installml
249 :     Description:
250 :    
251 :     Fixed two bugs in installml script. (Thanks to Vesa A. Norrman for
252 :     the patch.)
253 :    
254 :     ----------------------------------------------------------------------
255 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
256 : mblume 1487 Date: 2004/05/11 14:05:00 CDT
257 :     Tag: blume-20040511-nlffi-netbsd
258 :     Description:
259 :    
260 :     Added support for nlffi under netbsd. (Thanks to Vesa A. Norrman for
261 :     the patch.)
262 :    
263 :     ----------------------------------------------------------------------
264 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
265 : mblume 1486 Date: 2004/05/11 12:05:00 CDT
266 :     Tag: blume-20040511-exports
267 :     Description:
268 :    
269 :     As per request by Adam Chlipala <adam@hcoop.net>, extended various
270 :     export lists in compiler-related .cm-files.
271 :    
272 :     ----------------------------------------------------------------------
273 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
274 : mblume 1485 Date: 2004/05/11 11:35:00 CDT
275 :     Tag: blume-20040511-allsource
276 :     Description:
277 :    
278 :     The installer now honors the "src-smlnj" target again, although its meaning
279 :     has changed from "all sources required for the compiler" to "all sources
280 :     the installer knows about". In other words, if you enable "src-smlnj"
281 :     in the "targets" file, then the installer will pull in sources for
282 :     everything. (Notice that this refers to source code only. Compiled
283 :     code is still only installed for modules that were requested explicitly
284 :     or which are required for other modules that were requested explicitly.)
285 :    
286 :     ----------------------------------------------------------------------
287 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
288 : mblume 1482 Date: 2004/04/23 17:40:00 CDT
289 :     Tag: blume-20040423-ieee-scan
290 :     Description:
291 :    
292 :     Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
293 :     in the exponent calculation we get INF or ZERO (depending on the mantissa
294 :     and the sign of the exponent).
295 :    
296 :     ----------------------------------------------------------------------
297 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
298 : mblume 1480 Date: 2004/04/23 10:40:00 CDT
299 :     Tag: blume-20040423-ml-build
300 :     Description:
301 :    
302 :     The ml-build script now terminates with a non-0 status when something
303 :     goes wrong.
304 :    
305 :     ----------------------------------------------------------------------
306 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
307 : mblume 1479 Date: 2004/04/22 16:35:00 CDT
308 :     Tag: blume-20040422-Option
309 :     Description:
310 :    
311 :     Made exception Option to be the same as exception Option.Option
312 :     (as it should be).
313 :    
314 :     ----------------------------------------------------------------------
315 : allenleung 1468 Name: Allen Leung (leunga (at) reservoir (dot) com)
316 :     Date: 2004/03/19 14:40:00 EST
317 :     Tag: leunga-20040319-cygwin-nlffi
318 :     Description:
319 :    
320 :     Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
321 :     of SML/NJ. The problem is that
322 :    
323 :     lib = dlopen(NULL, ...)
324 :     f = dlsym(lib, "malloc");
325 :    
326 :     does not work on Windows unless we explicitly export symbols
327 :     such as 'malloc' during linking. We fixed this by explicitly
328 :     exporting the required symbols with the magic gcc incantation:
329 :    
330 :     -Wl,--export-all cygwin.def
331 :    
332 :     where cygwin.def is a file containing all the symbols that
333 :     we wish to export.
334 :    
335 :     I suspect this is a Windows problem and we'll have to
336 :     do the same (somehow with windows compilers) when
337 :     we build the native win32 version with the system
338 :     calls LoadLibrary/GetProcAddress.
339 :    
340 :     ----------------------------------------------------------------------
341 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
342 : mblume 1465 Date: 2004/03/04 16:35:00 CST
343 :     Tag: blume-20040304-intinf-fmt
344 :     Description:
345 :    
346 :     Fixed problem with IntInf.fmt (sign would show up on the right instead
347 :     of on the left for BIN, OCT, and HEX).
348 :    
349 :     ----------------------------------------------------------------------
350 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
351 : mblume 1464 Date: 2004/03/04 11:25:00 CST
352 :     Tag: blume-20040304-symlinks
353 :     Description:
354 :    
355 :     Fixed problem with installer script (unix only) where bin/ml-yacc and
356 :     friends pointed (via symlinks) to absolute locations instead of just
357 :     .run-sml. This was reported by Vesa A Norrman.
358 :    
359 :     ----------------------------------------------------------------------
360 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
361 : mblume 1455 Date: 2004/02/13 14:50:00 CST
362 :     Tag: Release_110_45
363 :     Description:
364 :    
365 :     New working version (110.45). New bootfiles.
366 :    
367 :     ----------------------------------------------------------------------
368 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
369 : mblume 1448 Date: 2004/01/26 15:15:15 CST
370 :     Tag: blume-20040126-toplevel
371 :     Description:
372 :    
373 :     Improved handling of exceptions at the interactive toplevel.
374 :    
375 :     ----------------------------------------------------------------------
376 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
377 :     Date: 2004/01/26 11:25:00
378 : mblume 1446 Tag: blume-20040126-app
379 :     Description:
380 :    
381 :     Type of top-level "app" corrected.
382 : mblume 1447 Added code for setting vp_limitPtrMask to Win32-specific runtime.
383 : mblume 1446
384 :     ----------------------------------------------------------------------
385 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
386 : mblume 1427 Date: 2003/11/18 17:10 CST
387 :     Tag: blume-20031118-basis-fiddle
388 :     Description:
389 :    
390 :     - changed Timer interface to what might become the spec
391 :     - POSIX_FLAGS -> BIT_FLAGS according to spec
392 :     - some other minor discrepancies wrt. spec eliminated
393 :    
394 :     ----------------------------------------------------------------------
395 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
396 : mblume 1414 Date: 2003/11/06 12:00:00 CST
397 :     Tag: Release_110_44
398 :     Description:
399 :    
400 :     New working version (110.44). New bootfiles.
401 :    
402 :     ----------------------------------------------------------------------
403 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
404 : mblume 1411 Date: 2003/11/04 11:50:00 CST
405 :     Tag: blume-20031104-move-libraries
406 :     Description:
407 :    
408 :     Eliminated the "dont_move_libraries" directive in config/targets.
409 :     (The mechanism was broken and could not be fixed easily. Moreover,
410 :     there does not seem to be any reason not to move all libraries into
411 :     lib during installation. I originally implemented this directive as a
412 :     backward-compatibility feature when I first introduced the new CM.
413 :     Now that things have been stable for a long time and going back to the
414 :     old CM is not an option, there is no reason to keep it around.)
415 :    
416 :     ----------------------------------------------------------------------
417 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
418 : mblume 1409 Date: 2003/11/03 16:00:00 CST
419 :     Tag: blume-20031103-installdir
420 :     Description:
421 :    
422 :     Made installer honor INSTALLDIR variable again. (Thanks to Chris
423 :     Richards for pointing out the problem and providing the solution.)
424 :    
425 :     ----------------------------------------------------------------------
426 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
427 : mblume 1400 Date: 2003/10/01 17:05:00 CDT
428 :     Tag: blume-20031001-lal-mlrisc
429 :     Description:
430 :    
431 :     MLRISC bug fix from Lal.
432 :    
433 :     ----------------------------------------------------------------------
434 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
435 : mblume 1399 Date: 2003/09/30 16:10:00 CDT
436 :     Tag: blume-20030930-primio-bat
437 : mblume 1398 Description:
438 :    
439 :     1. Added openVector, nullRd, and nullWr to PRIM_IO.
440 :     2. Improved .bat files (for Win32 port) to make things work under Win95.
441 :     (thanks to Aaron S. Hawley for this one)
442 :    
443 :     ----------------------------------------------------------------------
444 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
445 : mblume 1395 Date: 2003/09/26 16:05:00 CDT
446 :     Tag: blume-20030926-wrappriv
447 :     Description:
448 :    
449 :     Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
450 :    
451 :     ----------------------------------------------------------------------
452 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
453 : mblume 1394 Date: 2003/09/26 15:00:00 CDT
454 :     Tag: blume-20030926-110_43_3
455 :     Description:
456 :    
457 :     - additional cleanup
458 :     - version number bump, NEW BOOTFILES
459 :    
460 :     ----------------------------------------------------------------------
461 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
462 : mblume 1393 Date: 2003/09/26 12:00:00 CDT
463 :     Tag: blume-20030926-ppautoload
464 :     Description:
465 :    
466 :     I modified the read-eval-print loop so that the autoloader gets
467 :     invoked whenever the prettyprinter tries to look up a symbol that
468 :     is not currently defined in the toplevel environment but which
469 :     appears in CM's autoload registry. As a result, we see far fewer of
470 :     those ?.Foo.Bar.xxx names in the prettyprinter's output.
471 :    
472 :     In addition to this I tried to clean up some pieces of the Basis
473 :     implementation (e.g., Socket, Word8Array) in order to prevent other
474 :     instances of these ?.Foo.Bar.xxx names from being printed.
475 :    
476 :     The mechanism that picks names for types still needs some work, though.
477 :     (Right now it seems that if there is a type A.t which is defined to
478 : mblume 1394 be B.u, but B is unavailable at toplevel, then A.t gets printed as
479 :     "?.B.u" although the perhaps more sensible solution would be to use
480 : mblume 1393 "A.t" in this case. In other words, the prettyprinter should follow
481 :     a chain of DEFtycs not farther than there are corresponding toplevel
482 :     names in the current environment.)
483 :    
484 :     ----------------------------------------------------------------------
485 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
486 : mblume 1391 Date: 2003/09/24 16:31:00 CDT
487 :     Tag: blume-20030924-installer
488 :     Description:
489 :    
490 :     Another installer tweak: All the ML code for the installer is now
491 :     compiled during CMB.make and put into a little library called
492 :     $smlnj/installer.cm. The installation then simply invokes
493 :    
494 :     sml -m $smlnj/installer.cm
495 :    
496 :     and everything happens automagically.
497 :    
498 :     Win32: ML code senses value of environment variable SMLNJ_HOME.
499 :     Unix: ML code senses values of environment variables ROOT, CONFIGDIR,
500 :     and BINDIR.
501 :    
502 :     The new scheme guarantees that the ML code responsible for the installation
503 :     is in sync with the APIs of the main system. Also, the installer is
504 :     somewhat faster because the installer script is precompiled.
505 :    
506 :     ----------------------------------------------------------------------
507 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
508 : mblume 1390 Date: 2003/09/24 15:35:00 CDT
509 :     Tag: blume-20030924-synsock
510 :     Description:
511 :    
512 :     Added a signature SYNCHRONOUS_SOCKET to basis.cm. This is like SOCKET
513 :     but excludes all non-blocking operations. Defined SOCKET (in Basis)
514 :     and CML_SOCKET in terms of SYNCHRONOUS_SOCKET. Removed superfluous
515 :     implementations of non-blocking operations from CML's Socket
516 :     structure.
517 :    
518 :     ----------------------------------------------------------------------
519 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
520 : mblume 1389 Date: 2003/09/24 15:10:05 CDT
521 :     Tag: blume-20030924-sockets
522 :     Description:
523 :    
524 :     1. Fixed SOCKET API and implementation to match Basis spec.
525 :     This required changing the internal representation of sockets to one
526 :     that remembers (for each socket file descriptor) whether it is currently
527 :     blocking or non-blocking. This state is maintained lazily (i.e., a system
528 :     call is made only if the state actually needs to change).
529 :    
530 :     2. OS-specific details of sockets were moved into separate files, thus
531 :     making it possible to unify the bulk of the socket implementations
532 :     between Unix and Win32.
533 :    
534 :     3. CML's socket API changed accordingly.
535 :     (Note that we need to remove non-blocking functions from this API
536 :     since they are redundant in the case of CML!)
537 :    
538 :     4. CML's socket implementation now makes use of non-blocking functions
539 :     provided by Basis, thus removing all OS-dependent code from this part
540 :     of CML.
541 :    
542 :     5. Changed Real64.precision from 52 to 53. Minor cleanup in Real64 code.
543 :    
544 :     ----------------------------------------------------------------------
545 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
546 : mblume 1387 Date: 2003/09/22 12:10:00 CDT
547 : mblume 1388 Tag: blume-20030922-110_43_2
548 : mblume 1387 Description:
549 :    
550 :     Made a new interim version and bootfiles for developer's bootstrapping
551 :     convenience.
552 :    
553 :     110.43.2 -- NEW BOOTFILES
554 :    
555 :     ----------------------------------------------------------------------
556 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
557 : mblume 1385 Date: 2003/09/19 15:55:00 CDT
558 :     Tag: blume-20030919-cmdir
559 :     Description:
560 :    
561 :     1. new-install.sh -> install.sh
562 :     2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
563 :     3. tweaked installer so that another name instead of .cm can be chosen
564 :     at install time (by setting the CM_DIR_ARC environment variable
565 :     during installation); once installation is complete, the name is
566 :     fixed
567 :    
568 :     ----------------------------------------------------------------------
569 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
570 : mblume 1384 Date: 2003/09/18 16:00:00 CDT
571 :     Tag: blume-20030918-110_43_1
572 :     Description:
573 :    
574 :     Made a new interim version and bootfiles for developer's bootstrapping
575 :     convenience.
576 :    
577 :     110.43.1 -- NEW BOOTFILES
578 :    
579 :     ----------------------------------------------------------------------
580 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
581 : mblume 1383 Date: 2003/09/18 15:20:00 CDT
582 :     Tag: blume-20030918-misc
583 :     Description:
584 :    
585 :     1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
586 :     this seems to be controversial at the moment) and used those in
587 :     Posix.ProcEnv.times.
588 :    
589 :     2. Added Time.{from,to}Nanoseconds to Time.
590 :    
591 :     3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
592 :     For example, fromLargeInt never needs to look at more than 3 "big
593 :     digits" to get its 53 bits of precision.
594 :    
595 :     ----------------------------------------------------------------------
596 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
597 : mblume 1381 Date: 2003/09/17 16:30:00 CDT
598 :     Tag: blume-20030917-real32-slices
599 :     Description:
600 :    
601 :     Added an entry to the primitive environment
602 :     (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
603 :     added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
604 :    
605 :     Removed some of the "magic" constants in real64.sml and replaced them
606 :     with code that generates these values from their corresponding
607 :     integer counterparts.
608 :    
609 :     Made all(?) the slice-related changes to the Basis and made everything
610 :     compile again...
611 :    
612 :     ----------------------------------------------------------------------
613 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
614 : mblume 1375 Date: 2003/09/15 17:45:00 CDT
615 :     Tag: blume-20030915-rbase
616 :     Description:
617 :    
618 :     Fixed bug in Real.fromLargeInt.
619 :    
620 :     ----------------------------------------------------------------------
621 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
622 : mblume 1369 Date: 2003/09/13 18:11:00 CDT
623 :     Tag: blume-20030913-libinstall
624 :     Description:
625 :    
626 :     Minor bugfix in config/libinstall (set anchor with path to
627 :     standalone tool after installing it, otherwise libraries that
628 :     need ml-lex or ml-yacc won't compile the first time the installer
629 :     runs).
630 :    
631 :     ----------------------------------------------------------------------
632 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
633 : mblume 1368 Date: 2003/09/12 11:45:00 CDT
634 :     Tag: blume-20030912-various
635 :     Description:
636 :    
637 :     - fixed bug in Real.toLargeInt
638 :     - fixed bug in Posix.ProcEnv.times
639 :     - changed inputLine functions to return an option
640 :     - minor installer improvements / bugfixes
641 :     - changed default @SMLalloc parameter for x86/celeron to 64k
642 :    
643 :     ----------------------------------------------------------------------
644 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
645 : mblume 1356 Date: 2003/09/09 22:00:00 CDT
646 :     Tag: Release_110_43
647 :     Description:
648 :    
649 :     New working release 110.43. New bootfiles.
650 :    
651 :     ----------------------------------------------------------------------
652 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
653 : mblume 1354 Date: 2003/09/09 19:20:00 CDT
654 :     Tag: blume-20030909-installer
655 :     Description:
656 :    
657 :     Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
658 :     Modified config/install.bat to take advantage of it. Also modified
659 :     config/install.sh (and called it config/new-install.sh) to take advantage
660 :     of it on Unix systems. (The SML code is (supposed to be) platform-
661 :     independent.)
662 :    
663 :     The installer can now install everything under Win32
664 :     as well as under *nix as long as it compiles.
665 :    
666 :     Other changes:
667 :    
668 :     - made CML compile again under Win32
669 :     - made eXene compile under Win32 (by providing a fake structure UnixSock
670 :     and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
671 :     - fixed a bug in nowhere: it assumed that type OS.Process.status is the
672 :     same as type int; under Win32 it isn't
673 :     - fixed some slice-related problems in the win32-specific parts of CML
674 :     - added a functor argument "sameVol" to os-path-fn.sml in the Basis
675 :     (under Win32, the volume name is case-insensitive, and the
676 :     OS.Path code compares volume names for equality)
677 :    
678 :     ----------------------------------------------------------------------
679 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
680 : mblume 1353 Date: 2003/09/08 11:55:00 CDT
681 :     Tag: blume-20030908-fullpath
682 :     Description:
683 :    
684 :     Made Win32 version of OS.FileSys.fullPath return current directory
685 :     when given an empty string. This is what the spec says, and incidentally,
686 :     CM depends on it. (CM otherwise goes into an infinite loop in certain
687 :     cases when presented with the name of a non-existing .cm file.)
688 :    
689 :     ----------------------------------------------------------------------
690 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
691 : mblume 1350 Date: 2003/09/04 16:30:00 CDT
692 : mblume 1352 Tag: blume-20030905-slices-etc
693 : mblume 1350 Description:
694 :    
695 :     1. Changed interface to vectors and arrays in Basis to match
696 :     (draft) Basis spec.
697 :     2. Added signatures and implementations of slices according to
698 :     Basis spec.
699 :     3. Edited source code throughout the system to make it compile again
700 :     under 1. and 2. (In some cases code had to be added to have it
701 :     match the new signatures.)
702 :     4. MLRISC should be backward-compatible: the copies of the originals
703 :     of files that needed to change under 3. were retained, the .cm files
704 :     check the compiler version number and use old versions when
705 :     appropriate.
706 :     5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
707 :     dirstream -> string option (in accordance with Basis spec).
708 :     6. When generating code that counts lines, ml-lex used function
709 :     CharVector.foldli, taking advantage of its old interface.
710 :     This has been replaced with the corresponding code from
711 :     CharVectorSlice. (html-lex must be re-lexed!)
712 :     7. BitArray in smlnj-lib/Util has been extended/modified to match the
713 :     new MONO_ARRAY signature. (Do we need BitArraySlice?)
714 :     8. Removed temporary additions (fromInternal, toInternal) from the
715 :     (now obsolete) IntInf in smlnj-lib/Util.
716 :     9. Cleaned up structure Byte.
717 :     10. Added localOffset, scan, and fromString to Date (according to spec).
718 :     Cleaned/corrected implementation of Date.
719 :     (Still need to check for correctness; implement better canonicalizeDate.)
720 :     11. Added "scan" to signature IEEE_REAL.
721 :     12. Some improvements to IntInf [in particular: efficiency-hack for
722 :     mod and rem when second operand is 2 (for parity checks).]
723 :     13. Changed representation of type Time.time, using a single IntInf.int
724 :     value counting microseconds. This considerably simplified the
725 :     implementation of structure Time. We now support negative time
726 :     values; scan and fromString handle signs.
727 :     14. Functor PrimIO now takes two additional arguments (VectorSlice and
728 :     ArraySlice).
729 :    
730 :     ----------------------------------------------------------------------
731 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
732 : mblume 1347 Date: 2003/08/28 17:00:00 CDT
733 :     Tag: blume-20030828-intinf
734 :     Description:
735 :    
736 :     This is a major update which comes with a version number bump
737 :     (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
738 :     and an implementation of IntInf in the Basis.
739 :    
740 :     There are a fairly large number of related changes and updates throughout
741 :     the system:
742 :    
743 :     Basis:
744 :     - Implemented IntInf.
745 :     - Made LargeInt a projection of IntInf (by filtering through INTEGER).
746 : mblume 1348 - Added some missing Real64 operations, most notably Real.toLargeInt.
747 : mblume 1347 - Added FixedInt as a synonym for Int32.
748 :    
749 :     compiler:
750 :     * Added support for a built-in intinf type.
751 :     - literals
752 :     - pattern matching
753 :     - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
754 :     - overloading on literals and operations
755 :    
756 :     This required adding a primitive type intinf, some additional
757 :     primops, and implementations for several non-trivial intinf
758 :     operations in Core. (The intinf type is completely abstract
759 :     to the compiler; all operations get delegated back to the Core.)
760 :    
761 :     * Intinf equality is handled by polyequal. However, the compiler
762 :     does not print its usual warning in this case (since polyequal
763 :     is the right thing to do there).
764 :    
765 :     * Improved the organization of structure InlineT.
766 :    
767 :     * A word about conversion primops:
768 :     If conversions involving intinf do not cancel out during
769 : mblume 1348 CPS contract, then the compiler must insert calls to Core functions.
770 : mblume 1347 Since all core access must be resolved already during the FLINT
771 :     translate phase, it would be too late a the time of CPS contract
772 : mblume 1348 to add new Core calls. For this reason, conversion primops
773 : mblume 1347 for intinf carry two arguments: 1. the numeric argument that
774 :     they are supposed to convert, and 2. the Core function that
775 :     can help with this conversion if necessary. If CPS contract
776 : mblume 1348 eliminates a primop, then the associated Core function becomes
777 :     dead and goes away. Intinf conversion primops that do not get
778 :     eliminated by CPS contract get rewritten into calls of their
779 :     core functions by a separate, new phase.
780 : mblume 1347
781 :     interactive system:
782 :     - Control.Print.intinfDepth controls max length of intinf constants
783 :     being printed. (Analogous to Control.Print.stringDepth.)
784 :     - Cleanup in printutil and pputil: got rid of unused stuff and
785 :     duplicates; replaced some of the code with code that makes better
786 :     use of library functionality.
787 :    
788 :     CM:
789 :     Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
790 :     are no longer silent.
791 :    
792 :     CKIT:
793 :     Fixed mismatched uses of Int32 and LargeInt. I always decided
794 :     in favor of LargeInt -- which is now the same as IntInf.
795 :     CKIT-knowledgable people should check whether this is what's
796 :     intended and otherwise change things back to using Int32 or
797 :     FixedInt.
798 :    
799 :     Throughout the code:
800 : mblume 1348 Started using IntInf.int literals and built-in operations
801 : mblume 1347 (e.g., comparison with 0) where this seems appropriate.
802 :    
803 :    
804 :     ----------------------------------------------------------------------
805 : macqueen 1343 Name: Dave MacQueen (dbm@cs.uchicago.edu)
806 :     Date: 2003/08/13 11:36:00 CDT
807 :     Tag: dbm-20030813-mcz-merge1
808 :     Description:
809 :    
810 :     Merging changes from the mcz-branch development branch into trunk.
811 :     These changes involve replacement of the emulated old prettyprinter
812 :     interface with direct use of the SML/NJ Lib PP library, and fixing
813 :     of a couple of bugs (895, 1186) relating to error messages. A new
814 :     prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
815 :     has been added.
816 :    
817 :     ----------------------------------------------------------------------
818 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
819 : mblume 1342 Date: 2003/08/11 15:45:00 CDT
820 :     Tag: blume-20030811-windows
821 :     Description:
822 :    
823 :     Version number bumped to 110.42.9. NEW BOOTFILES!!!
824 :    
825 :     http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
826 :    
827 :     This patch restores SML/NJ's ability to run under win32. There are a
828 :     number of changes, including fixes for several bugs that had gone
829 :     unnoticed until now:
830 :    
831 :     - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
832 :     trying to run the win32 version from within cygwin.)
833 :    
834 :     - There are a number of simple .bat scripts that substitute for their
835 :     corresponding Unix shell-scripts. (See below.)
836 :    
837 :     - The internals of ml-build have been modified slightly. The main
838 :     difference is that instead of calling ".link-sml" (or link-sml.bat)
839 :     using OS.Process.system, the ML process delegates this task back
840 :     to the script. Otherwise problems arise in mixed environments such
841 :     as Cygwin where scripts look and work like Unix scripts, but
842 :     where OS.Process.system cannot run them.
843 :    
844 :     - In CM, the srcpath pickler used native pathname syntax -- which
845 :     is incorrect in the case of cross-compilation. The new pickle format
846 :     is independent of platform-specific naming conventions.
847 :    
848 :     - Path configuration files (such as lib/pathconfig) can now choose
849 :     between native and standard syntax. Placing a line of the form
850 :    
851 :     standard!
852 :    
853 :     into the file causes all subsequent paths to be interpreted using
854 :     CM standard pathname syntax (= Unix conventions); a line
855 :    
856 :     native!
857 :    
858 :     switches back to native style. This was needed so that
859 :     path config files can be written portably, see src/system/pathconfig.
860 :    
861 :     - Runtime system:
862 :    
863 :     - win32-filesys.c: get_file_time and set_file_time now
864 :     access modification time, not creation time.
865 :    
866 :     - I/O code made aware of new array representation.
867 :    
868 :     - Bug fixes in X86.prim.masm.
869 :    
870 :     - src/system/makeml made aware of win32. (For use under cygwin
871 :     and other Unix-environments for windows.)
872 :    
873 :     - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
874 :     which caused BinIO.inputAll to fail consistently.
875 :    
876 :     .bat scripts:
877 :    
878 :     Windows .bat scripts assume that SMLNJ_HOME is defined.
879 :    
880 :     - sml.bat, ml-yacc.bat, ml-lex.bat: Driver scripts for standalone
881 :     applications (sml, ml-yacc, ml-lex).
882 :     - ml-build.bat: analogous to ml-build.
883 :     - config\install.bat: Analogous to config/install.sh. This requires
884 :     that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
885 :     (nmake etc. must be on the path, and vcvars32 must have been run.)
886 :     Moreover, sources for ml-lex and ml-yacc need to exist under src,
887 :     and the bootfile hierarchy must have been unpacked under
888 :     sml.boot.x86-win32.
889 :     The script is very primitive and does a poor job at error checking.
890 :     It only installs the base system, ml-lex, and ml-yacc. No other
891 :     libraries are being installed (i.e., you get only those that
892 :     are part of the compiler.)
893 :     - link-sml.bat: analogous to .link-sml, but not currently used
894 :    
895 :     Unrelated bug fixes:
896 :    
897 :     - ml-nlffigen now exports structures ST_* corresponding to incomplete
898 :     types.
899 :     - Added getDevice to PP/src/pp-debug-fn.sml. (Would not compile
900 :     otherwise.)
901 :    
902 :     ----------------------------------------------------------------------
903 : macqueen 1337 Name: Dave MacQueen (macqueen@cs.uchicago.edu)
904 :     Date: 2003/06/17
905 :     Tag: macqueen-20030617-bug895
906 :     Description:
907 :    
908 :     Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
909 :     Tag will be used for new development branch (mcz-branch) for
910 :     use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
911 :    
912 :     ----------------------------------------------------------------------
913 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
914 : mblume 1335 Date: 2003/05/27 16:55:00 CDT
915 :     Tag: blume-20030527-polyeq
916 :     Description:
917 :    
918 :     Tried to eliminated most cases of polymorphic equality.
919 :    
920 :     ----------------------------------------------------------------------
921 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
922 : mblume 1334 Date: 2003/05/21 17:45:00 CDT
923 :     Tag: blume-20030517-complete
924 :     Description:
925 :    
926 :     Two changes:
927 :    
928 :     1. Added a flag for controlling whether non-exhaustive bindings will
929 :     be treated as errors (default is false).
930 :     2. Cleaned up the *entire* source tree so that CMB.make goes through
931 :     without a single non-exhaustive match- or bind warning.
932 :    
933 :     ----------------------------------------------------------------------
934 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
935 : mblume 1332 Date: 2003/05/17 10:20:00 CDT
936 :     Tag: blume-20030517-absyn
937 :     Description:
938 :    
939 :     1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
940 :    
941 :     This mainly affects the quality of error messages. However, some
942 :     of the code is now more straightforward than before. (Treatment of
943 :     the above four constructs in translate.sml is much simpler than
944 :     the "macro-expansion" that was going on before. Plus, the mach-
945 :     compiler no longer gets invoked just to be able to compile an
946 :     if-expression.)
947 :    
948 :     2. The ErrorMsg.Error exception is now caught and absorbed by the
949 :     interactive loop.
950 :    
951 :     ----------------------------------------------------------------------
952 : allenleung 1327 Name: Allen Leung
953 :     Date: 2003/05/16 13:05:00 CDT
954 :     Tag: leunga-20030516-cygwin-runtime
955 :     Description:
956 :    
957 :     Ported the runtime system to cygwin, which uses the unix
958 :     x86-unix bin files. Missing/buggy features:
959 :    
960 :     o getnetbyname, getnetbyaddr: these functions seem to be missing in
961 :     the Cygwin library.
962 :     o Ctrl-C handling may be flaky.
963 :     o Windows system calls and Windows I/O are not supported.
964 :    
965 :     A new set of binfiles is located at:
966 :    
967 :     http://www.dorsai.org/~leunga/boot.x86-unix.tgz
968 :    
969 :     This is only needed for bootstrapping the cygwin version of smlnj.
970 :     Other x86 versions can use the existing binfiles.
971 :    
972 :     ----------------------------------------------------------------------
973 : mblume 1317 Name: Matthias Blume
974 :     Date: 2003/04/08 15:42:00 CDT
975 :     Tag: blume-20030408-listpair
976 :     Description:
977 :    
978 :     1. Added a target 'mlrisc' to installer.
979 :    
980 :     2. Added missing elements to structure ListPair.
981 :    
982 :     ----------------------------------------------------------------------
983 : leunga 1296 Name: Allen Leung
984 :     Date: 2003/01/07 10:40:00 EST
985 :     Tag: leunga-20030107-int-rem
986 :     Description:
987 :    
988 :     Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
989 :     The arguments to the SUBL instruction were swapped.
990 :    
991 :     ----------------------------------------------------------------------
992 : blume 1229 Name: Matthias Blume
993 : blume 1294 Date: 2002/12/12 16:25:00 EST
994 :     Tag: blume-20021212-risc-ra
995 :     Description:
996 :    
997 :     Fixed a serious bug in the rewrite code for FP spilling/reloading that
998 :     sent the RA into an infinite loop when floating point registers get
999 :     spilled. (Because of this bug, e.g., nucleic stopped compiling between
1000 :     110.37 and 110.38.)
1001 :     There was another set of potential problems related to the handling of
1002 :     MLRISC annotations (but those did not yet cause real problems, apparently).
1003 :    
1004 :     ----------------------------------------------------------------------
1005 :     Name: Matthias Blume
1006 : blume 1291 Date: 2002/12/06 22:40:00 EST
1007 :     Tag: blume-20021206-cm-fileid
1008 :     Description:
1009 :    
1010 :     Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
1011 :     This fixes the problem of CM getting confused by files that suddenly
1012 :     change their identity (e.g., by getting unlinked and recreated by some
1013 :     text editor such as vi). There might be a better/cheaper/cleaner way
1014 :     of doing this, but for now this will have to do.
1015 :    
1016 :     ----------------------------------------------------------------------
1017 :     Name: Matthias Blume
1018 : blume 1288 Date: 2002/10/28 09:50:00 EST
1019 :     Tag: blume-20021028-typecheck
1020 :     Description:
1021 :    
1022 :     Exported structure Typecheck from $smlnj/viscomp/core.cm.
1023 :    
1024 :     ----------------------------------------------------------------------
1025 :     Name: Matthias Blume
1026 : blume 1282 Date: 2002/10/17 09:10:00 EDT
1027 : blume 1279 Tag: Release_110_42
1028 :     Description:
1029 :    
1030 : blume 1282 In good old tradition, there has been a slight hiccup so that we have
1031 :     to patch 110.42 after the fact. The old release tag has been replaced
1032 :     (see below).
1033 :    
1034 :     The change solves a problem with two competing approaches the
1035 :     configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
1036 :     each other's way.
1037 :    
1038 :     This change only affects the runtime system code and the installer script.
1039 :     (No new bootfiles.)
1040 :    
1041 :     ----------------------------------------------------------------------
1042 :     Name: Matthias Blume
1043 :     Date: 2002/10/16 12:00:00 EDT
1044 :     Tag: Release_110_42_removed
1045 :     Description:
1046 :    
1047 : blume 1279 New working release. New bootfiles.
1048 :    
1049 :     ----------------------------------------------------------------------
1050 :     Name: Matthias Blume
1051 : blume 1273 Date: 2002/10/10 13:10:00 EDT
1052 :     Tag: blume-20021010-ppc-divs
1053 :     Description:
1054 :    
1055 :     The mltree operator DIVS must be implemented with an overflow check on
1056 :     the PPC because the hardware indicates divide-by-zero using "overflow" as
1057 :     well.
1058 :    
1059 :     ----------------------------------------------------------------------
1060 :     Name: Matthias Blume
1061 : blume 1261 Date: 2002/07/23 11:45:00
1062 :     Tag: blume-20020723-smlnj-home
1063 :     Description:
1064 :    
1065 :     Sml now senses the SMLNJ_HOME environment variable. If this is set,
1066 :     then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1067 :     CM_PATHCONFIG is also set), the path configuration file is assumed
1068 :     to be in $SMLNJ_HOME/lib/pathconfig. This way one can easily move
1069 :     the entire tree to some other place and everything will "just work".
1070 :    
1071 :     (Companion commands such as ml-build and ml-makedepend also sense this
1072 :     variable.)
1073 :    
1074 :     ----------------------------------------------------------------------
1075 :     Name: Matthias Blume
1076 : blume 1259 Date: 2002/07/12 21:19:00 EDT
1077 :     Tag: blume-20020712-liveness
1078 :     Description:
1079 :    
1080 :     Exported two useful "step" functions from liveness module (MLRISC).
1081 :    
1082 :     ----------------------------------------------------------------------
1083 :     Name: Matthias Blume
1084 : blume 1253 Date: 2002/07/05 16:00 EDT
1085 :     Tag: Release_110_41
1086 :     Description:
1087 :    
1088 :     New working release. New bootfiles.
1089 :    
1090 :     ----------------------------------------------------------------------
1091 :     Name: Matthias Blume
1092 : blume 1250 Date: 2002/07/05 10:25:00 EDT
1093 :     Tag: blume-20020705-btimp
1094 :     Description:
1095 :    
1096 :     Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1097 :     other clients can set up backtracing support.
1098 :    
1099 :     ----------------------------------------------------------------------
1100 :     Name: Matthias Blume
1101 : blume 1249 Date: 2002/06/25 17:23:00 EDT
1102 :     Tag: blume-20020625-fpmax
1103 :     Description:
1104 :    
1105 :     Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1106 :     case. (The sense of the isNaN test was reversed -- which made min and
1107 :     max always return their first argument.)
1108 :    
1109 :     ----------------------------------------------------------------------
1110 :     Name: Matthias Blume
1111 : blume 1240 Date: 2002/06/11
1112 :     Tag: blume-20020611-unixpath
1113 :     Description:
1114 :    
1115 :     Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1116 :    
1117 :     ----------------------------------------------------------------------
1118 :     Name: Matthias Blume
1119 : blume 1238 Date: 2002/06/10 16:35:00 EDT
1120 :     Tag: blume-20020610-ieeereal
1121 :     Description:
1122 :    
1123 :     I back-ported my implementation of IEEEReal.fromString from the
1124 :     idlbasis-devel branch so that we can test it.
1125 :    
1126 :     Another small change is that ppDec tries to give more information
1127 :     than just "<sig>" in the case of functors. However, this code is
1128 :     broken in some mysterious way if the functor's body's signature
1129 :     has not been declared by ascription but gets inferred from the
1130 :     implementation. This needs fixing...
1131 :    
1132 :     ----------------------------------------------------------------------
1133 :     Name: Matthias Blume
1134 : blume 1229 Date: 2002/05/31
1135 :     Tag: blume-20020531-btrace-mode
1136 :     Description:
1137 :    
1138 :     Resurrected SMLofNJ.Internals.BTrace.mode. (It accidentally fell by
1139 :     the wayside when I switched over to using Controls everywhere.)
1140 :    
1141 :     ----------------------------------------------------------------------
1142 : george 1222 Name: Lal George
1143 :     Date: 2002/05/23 12:21:40 EDT
1144 :     Tag: george-20020523-visual-labels
1145 :     Description:
1146 :    
1147 :     Labels are now displayed in the graphical output to make
1148 :     the fall-through and target blocks obvious.
1149 :    
1150 :     ----------------------------------------------------------------------
1151 : blume 1204 Name: Matthias Blume
1152 : blume 1220 Date: 2002/05/22 11:03:00 EDT
1153 :     Tag: blume-20020522-shrink
1154 :     Description:
1155 :    
1156 :     John tweaked yesterday's fix for 1131 to handle an out-of-memory
1157 :     situation that comes up when allocating huge arrays.
1158 :    
1159 :     ----------------------------------------------------------------------
1160 :     Name: Matthias Blume
1161 : blume 1215 Date: 2002/05/21 16:00:00 EDT
1162 :     Tag: Release_110_40
1163 :     Description:
1164 :    
1165 :     New working release (110.40). New bootfiles.
1166 :    
1167 :     [Also: John Reppy fixed GC bug 1131.]
1168 :    
1169 :     ----------------------------------------------------------------------
1170 :     Name: Matthias Blume
1171 : blume 1212 Date: 2002/05/21 12:35:00 EDT
1172 :     Tag: blume-20020521-cmdoc
1173 :     Description:
1174 :    
1175 :     CM documentation update.
1176 :    
1177 :     ----------------------------------------------------------------------
1178 :     Name: Matthias Blume
1179 : blume 1211 Date: 2002/05/21 10:55:00 EDT
1180 :     Tag: blume-20020521-misc
1181 :     Description:
1182 :    
1183 :     - John tweaked runtime to be silent on heap export (except when
1184 :     GC messages are on).
1185 :     - I added a few more things (cross-compiling versions of CMB) to
1186 :     config/preloads (as suggestions).
1187 :    
1188 :     ----------------------------------------------------------------------
1189 :     Name: Matthias Blume
1190 : blume 1208 Date: 2002/05/20 22:25:00 EDT
1191 :     Tag: blume-20020520-controls
1192 :     Description:
1193 :    
1194 :     - Added ControlUtil structure to control-lib.cm.
1195 :     - Use it throughout.
1196 :     - Used Controls facility to define MLRISC controls (as opposed to
1197 :     registering MLRISC control ref cells with Controls after the fact)
1198 :     - Fixed messed-up controls priorities.
1199 :    
1200 :     * Removed again all the stuff from config/preloads that one wouldn't
1201 :     be able to preload at the time the initial heap image is built.
1202 :     (Many libraries, e.g., CML, do not exist yet at this time. The
1203 :     only libraries that can be preloaded via config/preloads are those
1204 :     that come bundled with the bootfiles.)
1205 :    
1206 :     ----------------------------------------------------------------------
1207 :     Name: Matthias Blume
1208 : blume 1204 Date: 2002/05/20 10:59:00 EDT
1209 :     Tag: blume-20020520-preloads
1210 :     Description:
1211 :    
1212 :     Added a lot of commented-out suggestions for things to be included
1213 :     in config/preloads.
1214 :    
1215 :     ----------------------------------------------------------------------
1216 : leunga 1203 Name: Allen Leung
1217 :     Date: 2002/05/18 14:20:00 EDT
1218 :     Tag: leunga-20020518-mdl
1219 :     Description:
1220 :    
1221 :     o Made the mdl tool stuff compile and run again.
1222 :     o I've disabled all the stuff that depends on RTL specifications; they
1223 :     are all badly broken anyway.
1224 :    
1225 :     ----------------------------------------------------------------------
1226 : blume 1201 Name: Matthias Blume
1227 :     Date: 2002/05/17 16:49:00 EDT
1228 :     Tag: blume-20020517-controls
1229 :     Description:
1230 :    
1231 :     0. John Reppy made several modifications to the SML/NJ library.
1232 :     In particular, there is a shiny new controls-lib.cm.
1233 :    
1234 :     1. Pushed new controls interface through compiler so that everything
1235 :     compiles again.
1236 :    
1237 :     2. Added FormatComb and FORMAT_COMB to the CML version of the
1238 :     SML/NJ library (so that CML compiles again).
1239 :    
1240 :     3. Modified init scripts because XXX_DEFAULT environment variables
1241 :     are no longer with us. (Boot-time initialization is now done
1242 :     using the same environment variables that are also used for
1243 :     startup-time initialization of controls.)
1244 :    
1245 :     ----------------------------------------------------------------------
1246 : george 1192 Name: Lal George
1247 :     Date: 2002/05/15 09:20:10 EDT
1248 :     Tag: george-20020515-pseudo-op-decls
1249 :     Description:
1250 :    
1251 :     All pseudo-ops emitted before the first segment declaration
1252 :     such as TEXT, DATA, and BSS directives are assumed to be global
1253 :     declarations and are emitted first in the assembly file. This is
1254 :     useful in a number of situations where one has pseudo-ops that are not
1255 :     specific to any segment, and also works around the constraint that one
1256 :     cannot have client pseudo-ops in the TEXT segment.
1257 :    
1258 :     Because no segment is associated with these declarations it is
1259 :     an error to allocate any space or objects before the first segment
1260 :     directive and an exception will be raised. However, we cannot make
1261 :     this check for client pseudo-ops.
1262 :    
1263 :     These top level declarations are a field in the CFG graph_info.
1264 :     In theory you can continue to add to this field after the CFG has been
1265 :     built -- provided you know what you are doing;-)
1266 :    
1267 :     ----------------------------------------------------------------------
1268 : blume 1175 Name: Matthias Blume
1269 : blume 1190 Date: 2002/05/13 16:40:00 EDT
1270 :     Tag: blume-20020513-pp-etc
1271 :     Description:
1272 :    
1273 :     A few minor bugfixes:
1274 :    
1275 :     - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1276 :     (Bogus printouts for redefined bindings still occur. Compiler
1277 :     bug should no longer occur now. We need to redo the prettyprinter
1278 :     from scratch.)
1279 :    
1280 :     - CM pathname printer now also adds escape sequences for ( and )
1281 :    
1282 :     - commend and docu fixes for ml-nlffi
1283 :    
1284 :     ----------------------------------------------------------------------
1285 :     Name: Matthias Blume
1286 : blume 1189 Date: 2002/05/10 16:40:00 EDT
1287 :     Tag: blume-20020510-erg-textio
1288 :     Description:
1289 :    
1290 :     Applied the following bugfix provided by Emden Gansner:
1291 :    
1292 :     Output is corrupted when outputSubstr is used rather than output.
1293 :    
1294 :     The problem occurs when a substring
1295 :    
1296 :     ss = (s, dataStart, dataLen)
1297 :    
1298 :     where dataStart > 0, fills a stream buffer with avail bytes left.
1299 :     avail bytes of s, starting at index dataStart, are copied into the
1300 :     buffer, the buffer is flushed, and then the remaining dataLen-avail
1301 :     bytes of ss are copied into the beginning of the buffer. Instead of
1302 :     starting this copy at index dataStart+avail in s, the current code
1303 :     starts the copy at index avail.
1304 :    
1305 :     Fix:
1306 :     In text-io-fn.sml, change line 695 from
1307 :     val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1308 :     to
1309 :     val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1310 :    
1311 :     ----------------------------------------------------------------------
1312 :     Name: Matthias Blume
1313 : blume 1186 Date: 2002/04/12 13:55:00 EDT
1314 :     Tag: blume-20020412-assyntax
1315 :     Description:
1316 :    
1317 :     1. Grabbed newer assyntax.h from the XFree86 project.
1318 :     2. Fiddled with how to compile X86.prim.asm without warnings.
1319 :     3. (Very) Minor cleanup in CM.
1320 :    
1321 :     ----------------------------------------------------------------------
1322 :     Name: Matthias Blume
1323 : blume 1185 Date: 2002/04/01 (no joke!) 17:07:00 EST
1324 :     Tag: blume-20020401-x86div
1325 :     Description:
1326 :    
1327 :     Added full support for div/mod/rem/quot on the x86, using the machine
1328 :     instruction's two results (without clumsily recomputing the remainder)
1329 :     directly where appropriate.
1330 :    
1331 :     Some more extensive power-of-two support was added to the x86 instruction
1332 :     selector (avoiding expensive divs, mods, and muls where they can be
1333 :     replaced with cheaper shifts and masks). However, this sort of thing
1334 :     ought to be done earlier, e.g., within the CPS optimizer so that
1335 :     all architectures benefit from it.
1336 :    
1337 :     The compiler compiles to a fixed point, but changes might be somewhat
1338 :     fragile nevertheless. Please, report any strange things that you might
1339 :     see wrt. div/mod/quot/rem...
1340 :    
1341 :     ----------------------------------------------------------------------
1342 :     Name: Matthias Blume
1343 : blume 1184 Date: 2002/03/29 17:22:00
1344 :     Tag: blume-20020329-div
1345 :     Description:
1346 :    
1347 :     Fixed my broken div/mod logic. Unfortunately, this means that the
1348 :     inline code for div/mod now has one more comparison than before.
1349 :     Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1350 :     The problem was with quotient = 0, because that alone does not tell
1351 :     us which way the rounding went. One then has to look at whether
1352 :     remainder and divisor have the same sign... :(
1353 :    
1354 :     Anyway, I replaced the bootfiles with fresh ones...
1355 :    
1356 :     ----------------------------------------------------------------------
1357 :     Name: Matthias Blume
1358 : blume 1183 Date: 2002/03/29 14:10:00 EST
1359 :     Tag: blume-20020329-inlprims
1360 :     Description:
1361 :    
1362 :     NEW BOOTFILES!!! Version number bumped to 110.39.3.
1363 :    
1364 :     Primops have changed. This means that the bin/boot-file formats have
1365 :     changed as well.
1366 :    
1367 :     To make sure that there is no confusion, I made a new version.
1368 :    
1369 :    
1370 :     CHANGES:
1371 :    
1372 :     * removed REMT from mltree (remainder should never overflow).
1373 :    
1374 :     * added primops to deal with divisions of all flavors to the frontend
1375 :    
1376 :     * handled these primops all the way through so they map to their respective
1377 :     MLRISC support
1378 :    
1379 :     * used these primops in the implementation of Int, Int32, Word, Word32
1380 :    
1381 :     * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1382 :    
1383 :     * parameterized INLMIN, INLMAX, and INLABS by a numkind
1384 :    
1385 :     * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1386 :     floating point
1387 :    
1388 :     * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1389 :     and Real (but Real.abs maps to a separate floating-point-only primop)
1390 :    
1391 :    
1392 :     TODO items:
1393 :    
1394 :     * Hacked Alpha32 instruction selection, disabling the selection of REMx
1395 :     instructions because the machine instruction encoder cannot handle
1396 :     them. (Hppa, PPC, and Sparc instruction selection did not handle
1397 :     REM in the first place, and REM is supported by the x86 machine coder.)
1398 :    
1399 :     * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1400 :     selection phase. (The two can be streamlined because the hardware
1401 :     delivers both quotient and remainder at the same time anyway.)
1402 :    
1403 :     * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1404 :     (Currently the behavior is inconsistent both across architectures and
1405 :     wrt. the draft Basis spec.)
1406 :    
1407 :     * Word8 should eventually be handled natively, too.
1408 :    
1409 :     * There seems to be one serious bug in mltree-gen.sml. It appears, though,
1410 :     as if there currently is no execution path that could trigger it in
1411 :     SML/NJ. (The assumptions underlying functions arith and promotable do not
1412 :     hold for things like multiplication and division.)
1413 :    
1414 :     ----------------------------------------------------------------------
1415 :     Name: Matthias Blume
1416 : blume 1181 Date: 2002/03/27 16:27:00 EST
1417 :     Tag: blume-20020327-mlrisc-divisions
1418 :     Description:
1419 :    
1420 :     Added support for all four division operations (ML's div, mod, quot,
1421 :     and rem) to MLRISC. In the course of doing so, I also rationalized
1422 :     the naming (no more annoying switch-around of DIV and QUOT), by
1423 :     parameterizing the operation by div_rounding_mode (which can be either
1424 :     DIV_TO_ZERO or DIV_TO_NEGINF).
1425 :    
1426 :     The generic MLTreeGen functor takes care of compiling all four
1427 :     operations down to only round-to-zero div.
1428 :    
1429 :     Missing pieces:
1430 :    
1431 :     * Doing something smarter than relying on MLTreeGen on architectures
1432 :     like, e.g., the x86 where hardware division delivers both quotient and
1433 :     remainder at the same time. With this, the implementation of the
1434 :     round-to-neginf operations could be further streamlined.
1435 :    
1436 :     * Remove inlining support for div/mod/rem from the frontend and replace it
1437 :     with primops that get carried through to the backend. Do this for all
1438 :     int and word types.
1439 :    
1440 :     ----------------------------------------------------------------------
1441 :     Name: Matthias Blume
1442 : blume 1180 Date: 2002/03/25 17:25:00 EST
1443 :     Tag: blume-20020325-divmod
1444 :     Description:
1445 :    
1446 :     I improved (hopefully without breaking them) the implementation of Int.div,
1447 :     Int.mod, and Int.rem. For this, the code in translate.sml now takes
1448 :     advantage of the following observations:
1449 :    
1450 :     Let q = x quot y r = x rem y
1451 :     d = x div y m = x mod y
1452 :    
1453 :     where "quot" is the round-to-zero version of integer division that
1454 :     hardware usually provides. Then we have:
1455 :    
1456 :     r = x - q * y where neither the * nor the - will overflow
1457 :     d = if q >= 0 orelse x = q * y then q else q - 1
1458 :     where neither the * nor the - will overflow
1459 :     m = if q >= 0 orelse r = 0 then r else r + y
1460 :     where the + will not overflow
1461 :    
1462 :     This results in substantial simplification of the generated code.
1463 :     The following table shows the number of CFG nodes and edges generated
1464 :     for
1465 :     fun f (x, y) = x OPER y
1466 :     (* with OPER \in div, mod, quot, rem *)
1467 :    
1468 :    
1469 :     OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1470 :     --------------------------------------------------------
1471 :     div | 24 | 39 | 12 | 16
1472 :     mod | 41 | 71 | 12 | 16
1473 :     quot | 8 | 10 | 8 | 10
1474 :     rem | 10 | 14 | 8 | 10
1475 :    
1476 :    
1477 :     ----------------------------------------------------------------------
1478 :     Name: Matthias Blume
1479 : blume 1179 Date: 2002/03/25 22:06:00 EST
1480 :     Tag: blume-20020325-cprotobug
1481 :     Description:
1482 :    
1483 :     Fixed a bug in cproto (c prototype decoder).
1484 :    
1485 :     ----------------------------------------------------------------------
1486 :     Name: Matthias Blume
1487 : blume 1178 Date: 2002/03/25 16:00:00 EST
1488 :     Tag: blume-20020325-raw-primops
1489 :     Description:
1490 :    
1491 :     I did some cleanup to Allen's new primop code and
1492 :     replaced yesterday's bootfiles with new ones.
1493 :     (But they are stored in the same place.)
1494 :    
1495 :     ----------------------------------------------------------------------
1496 :     Name: Matthias Blume
1497 : blume 1175 Date: 2002/03/24 22:40:00 EST
1498 :     Tag: blume-20020324-bootfiles
1499 :     Description:
1500 :    
1501 :     Made the bootfiles that Allen asked for.
1502 :    
1503 :     ----------------------------------------------------------------------
1504 : leunga 1174 Name: Allen Leung
1505 :     Date: 2002/03/23 15:50:00 EST
1506 :     Tag: leunga-20020323-flint-cps-rcc-primops
1507 :     Description:
1508 :    
1509 :     1. Changes to FLINT primops:
1510 :    
1511 :     (* make a call to a C-function;
1512 :     * The primop carries C function prototype information and specifies
1513 :     * which of its (ML-) arguments are floating point. C prototype
1514 :     * information is for use by the backend, ML information is for
1515 :     * use by the CPS converter. *)
1516 :     | RAW_CCALL of { c_proto: CTypes.c_proto,
1517 :     ml_args: ccall_type list,
1518 :     ml_res_opt: ccall_type option,
1519 :     reentrant : bool
1520 :     } option
1521 :     (* Allocate uninitialized storage on the heap.
1522 :     * The record is meant to hold short-lived C objects, i.e., they
1523 :     * are not ML pointers. With the tag, the representation is
1524 :     * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1525 :     *)
1526 :     | RAW_RECORD of {tag:bool,sz:int}
1527 :     and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1528 :    
1529 :     2. These CPS primops are now overloaded:
1530 :    
1531 :     rawload of {kind:numkind}
1532 :     rawstore of {kind:numkind}
1533 :    
1534 :     The one argument form is:
1535 :    
1536 :     rawload {kind} address
1537 :    
1538 :     The two argument form is:
1539 :    
1540 :     rawload {kind} [ml object, byte-offset]
1541 :    
1542 :     3. RAW_CCALL/RCC now takes two extra arguments:
1543 :    
1544 :     a. The first is whether the C call is reentrant, i.e., whether
1545 :     ML state should be saved and restored.
1546 :     b. The second argument is a string argument specifying the name of
1547 :     library and the C function.
1548 :    
1549 :     These things are currently not handled in the code generator, yet.
1550 :    
1551 :     4. In CProto,
1552 :    
1553 :     An encoding type of "bool" means "ml object" and is mapped into
1554 :     C prototype of PTR. Note that "bool" is different than "string",
1555 :     even though "string" is also mapped into PTR, because "bool"
1556 :     is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1557 :    
1558 :     5. Pickler/unpicker
1559 :    
1560 :     Changed to handle RAW_RECORD and newest RAW_CCALL
1561 :    
1562 :     6. MLRiscGen,
1563 :    
1564 :     1. Changed to handle the new rawload/rawstore/rawrecord operators.
1565 :     2. Code for handling C Calls has been moved to a new module CPSCCalls,
1566 :     in the file CodeGen/cpscompile/cps-c-calls.sml
1567 :    
1568 :     7. Added the conditional move operator
1569 :    
1570 :     condmove of branch
1571 :    
1572 :     to cps. Generation of this is still buggy so it is currently
1573 :     disabled.
1574 :    
1575 :     ----------------------------------------------------------------------
1576 : george 1168 Name: Lal George
1577 :     Date: 2002/03/22 14:18:25 EST
1578 : george 1171 Tag: george-20020322-cps-branch-prob
1579 : george 1168 Description:
1580 :    
1581 : george 1171 Implemented the Ball-Larus branch prediction-heuristics, and
1582 : george 1168 incorporated graphical viewers for control flow graphs.
1583 :    
1584 : george 1171 Ball-Larus Heuristics:
1585 : george 1168 ---------------------
1586 :     See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1587 :    
1588 :     By design it uses the Dempster-Shafer theory for combining
1589 :     probabilities. For example, in the function:
1590 :    
1591 :     fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1592 :    
1593 :     the ball-larus heuristics predicts that the n=0 is unlikely
1594 :     (OH-heuristic), and the 'then' branch is unlikely because of the
1595 :     RH-heuristic -- giving the 'then' branch an even lower combined
1596 : george 1171 probability using the Dempster-Shafer theory.
1597 : george 1168
1598 :     Finally, John Reppy's loop analysis in MLRISC, further lowers the
1599 :     probability of the 'then' branch because of the loop in the else
1600 :     branch.
1601 :    
1602 :    
1603 :     Graphical Viewing:
1604 :     ------------------
1605 :     I merely plugged in Allen's graphical viewers into the compiler. The
1606 :     additional code is not much. At the top level, saying:
1607 :    
1608 :     Control.MLRISC.getFlag "cfg-graphical-view" := true;
1609 :    
1610 :     will display the graphical view of the control flow graph just before
1611 :     back-patching. daVinci must be in your path for this to work. If
1612 :     daVinci is not available, then the default viewer can be changed
1613 :     using:
1614 :    
1615 :     Control.MLRISC.getString "viewer"
1616 :    
1617 :     which can be set to "dot" or "vcg" for the corresponding viewers. Of
1618 :     course, these viewers must be in your path.
1619 :    
1620 :     The above will display the compilation unit at the level of clusters,
1621 :     many of which are small, boring, and un-interesting. Also setting:
1622 :    
1623 :     Control.MLRISC.getInt "cfg-graphical-view_size"
1624 :    
1625 :     will display clusters that are larger than the value set by the above.
1626 :    
1627 :    
1628 :     ----------------------------------------------------------------------
1629 : blume 1159 Name: Matthias Blume
1630 :     Date: 2002/03/21 22:20:00 EST
1631 :     Tag: blume-20020321-kmp-bugfix
1632 :     Description:
1633 :    
1634 :     Changed the interface to the KMP routine in PreString and fixed
1635 :     a minor bug in one place where it was used.
1636 :    
1637 :     ----------------------------------------------------------------------
1638 : leunga 1156 Name: Allen Leung
1639 : leunga 1158 Date: 2002/03/21 20:30:00 EST
1640 :     Tag: leunga-20020321-cfg
1641 :     Description:
1642 :    
1643 :     Fixed a potential problem in cfg edge splitting.
1644 :    
1645 :     ----------------------------------------------------------------------
1646 :     Name: Allen Leung
1647 : leunga 1156 Date: 2002/03/21 17:15:00 EST
1648 :     Tag: leunga-20020321-x86-fp-cfg
1649 :     Description:
1650 :    
1651 :     1. Recoded the buggy parts of x86-fp.
1652 :    
1653 :     a. All the block reordering code has been removed.
1654 :     We now depend on the block placement phases to do this work.
1655 :    
1656 :     b. Critical edge splitting code has been simplified and moved into the
1657 :     CFG modules, as where they belong.
1658 :    
1659 :     Both of these were quite buggy and complex. The code is now much, much
1660 :     simpler.
1661 :    
1662 :     2. X86 backend.
1663 :    
1664 :     a. Added instructions for 64-bit support. Instruction selection for
1665 :     64-bit has not been committed, however, since that
1666 :     requires changes to MLTREE which haven't been approved by
1667 :     Lal and John.
1668 :    
1669 :     b. Added support for FUCOMI and FUCOMIP when generating code for
1670 :     PentiumPro and above. We only generate these instructions in
1671 :     the fast-fp mode.
1672 :    
1673 :     c. Added cases for JP and JNP in X86FreqProps.
1674 :    
1675 :     3. CFG
1676 :    
1677 :     CFG now has a bunch of methods for edge splitting and merging.
1678 :    
1679 :     4. Machine description.
1680 :    
1681 :     John's simplification of MLTREE_BASIS.fcond broke a few machine
1682 :     description things:
1683 :    
1684 :     rtl-build.{sig,sml} and hppa.mdl fixed.
1685 :    
1686 :     NOTE: the machine description stuff in the repository is still broken.
1687 :     Again, I can't put my fixes in because that involves
1688 :     changes to MLTREE.
1689 :    
1690 :     ----------------------------------------------------------------------
1691 : blume 1145 Name: Matthias Blume
1692 : blume 1155 Date: 2002/03/20 15:55:00 EST
1693 :     Tag: blume-20020320-kmp
1694 :     Description:
1695 :    
1696 :     Implemented Knuth-Morris-Pratt string matching in PreString and used
1697 :     it for String.isSubstring, Substring.isSubstring, and
1698 :     Substring.position.
1699 :    
1700 :     (Might need some stress-testing. Simple examples worked fine.)
1701 :    
1702 :     ----------------------------------------------------------------------
1703 :     Name: Matthias Blume
1704 : blume 1152 Date: 2002/03/19 16:37:00 EST
1705 :     Tag: blume-20020319-witnesses
1706 :     Description:
1707 :    
1708 :     Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
1709 :    
1710 :     This implements a generic mechanism for changing constness qualifiers
1711 :     anywhere within big C types without resorting to outright "casts".
1712 :     (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
1713 :     modify the constness at the outermost level.)
1714 :     The implementation of "convert" is based on the idea of "witness"
1715 :     values -- values that are not used by the operation but whose types
1716 :     "testify" to their applicability. On the implementation side, "convert"
1717 :     is simply a projection (returning its second curried argument). With
1718 :     cross-module inlining, it should not result in any machine code being
1719 :     generated.
1720 :    
1721 :     ----------------------------------------------------------------------
1722 :     Name: Matthias Blume
1723 : blume 1148 Date: 2002/03/15 16:40:00 EST
1724 :     Tag: blume-20020315-basis
1725 :     Description:
1726 :    
1727 :     Provided (preliminary?) implementations for
1728 :    
1729 :     {String,Substring}.{concatWith,isSuffix,isSubstring}
1730 :    
1731 :     and
1732 :    
1733 :     Substring.full
1734 :    
1735 :     Those are in the Basis spec but they were missing in SML/NJ.
1736 :    
1737 :     ----------------------------------------------------------------------
1738 :     Name: Matthias Blume
1739 : blume 1145 Date: 2002/03/14 21:30:00 EST
1740 :     Tag: blume-20020314-controls
1741 :     Description:
1742 :    
1743 :     Controls:
1744 :     ---------
1745 :    
1746 :     1. Factored out the recently-added Controls : CONTROLS stuff and put
1747 :     it into its own library $/controls-lib.cm. The source tree for
1748 :     this is under src/smlnj-lib/Controls.
1749 :    
1750 :     2. Changed the names of types and functions in this interface, so they
1751 :     make a bit more "sense":
1752 :    
1753 :     module -> registry
1754 :     'a registry -> 'a group
1755 :    
1756 :     3. The interface now deals in ref cells only. The getter/setter interface
1757 :     is (mostly) gone.
1758 :    
1759 :     4. Added a function that lets one register an already-existing ref cell.
1760 :    
1761 :     5. Made the corresponding modifications to the rest of the code so that
1762 :     everything compiles again.
1763 :    
1764 :     6. Changed the implementation of Controls.MLRISC back to something closer
1765 :     to the original. In particular, this module (and therefore MLRISC)
1766 :     does not depend on Controls. There now is some link-time code in
1767 :     int-sys.sml that registers the MLRISC controls with the Controls
1768 :     module.
1769 :    
1770 :     CM:
1771 :     ---
1772 :    
1773 :     * One can now specify the lambda-split aggressiveness in init.cmi.
1774 :    
1775 :     ----------------------------------------------------------------------
1776 : leunga 1142 Name: Allen Leung
1777 :     Date: 2002/03/13 17:30:00 EST
1778 :     Tag: leunga-20020313-x86-fp-unary
1779 :     Description:
1780 :    
1781 :     Bug fix for:
1782 :    
1783 :     > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
1784 :     > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
1785 :     > - fun f(x,(y,z)) = Real.~ y;
1786 :     > [autoloading]
1787 :     > [autoloading done]
1788 :     > fchsl (%eax), 184(%esp)
1789 :     > Error: MLRisc bug: X86MCEmitter.emitInstr
1790 :     >
1791 :     > uncaught exception Error
1792 :     > raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
1793 :    
1794 :     The problem was that the code generator did not generate any fp registers
1795 :     in this case, and the ra didn't know that it needed to run the X86FP phase to
1796 :     translate the pseudo fp instruction. This only happened with unary fp
1797 :     operators in certain situations.
1798 :    
1799 :     ----------------------------------------------------------------------
1800 : blume 1137 Name: Matthias Blume
1801 : blume 1140 Date: 2002/03/13 14:00:00 EST
1802 :     Tag: blume-20020313-overload-etc
1803 :     Description:
1804 :    
1805 :     1. Added _overload as a synonym for overload for backward compatibility.
1806 :     (Control.overloadKW must be true for either version to be accepted.)
1807 :    
1808 :     2. Fixed bug in install script that caused more things to be installed
1809 :     than what was requested in config/targets.
1810 :    
1811 :     3. Made CM aware of the (_)overload construct so that autoloading
1812 :     works.
1813 :    
1814 :     ----------------------------------------------------------------------
1815 :     Name: Matthias Blume
1816 : blume 1138 Date: 2002/03/12 22:03:00 EST
1817 :     Tag: blume-20020312-url
1818 :     Description:
1819 :    
1820 :     Forgot to update BOOT and srcarchiveurl.
1821 :    
1822 :     ----------------------------------------------------------------------
1823 :     Name: Matthias Blume
1824 : blume 1137 Date: 2002/03/12 17:30:00 EST
1825 :     Tag: blume-20020312-version110392
1826 :     Description:
1827 :    
1828 :     Yet another version number bump (because of small changes to the
1829 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
1830 :    
1831 :     Changes:
1832 :    
1833 :     The new pid generation scheme described a few weeks ago was overly
1834 :     complicated. I implemented a new mechanism that is simpler and
1835 :     provides a bit more "stability": Once CM has seen a compilation
1836 :     unit, it keeps its identity constant (as long as you do not delete
1837 :     those crucial CM/GUID/* files). This means that when you change
1838 : blume 1145 an interface, compile, then go back to the old interface, and
1839 : blume 1137 compile again, you arrive at the original pid.
1840 :    
1841 :     There now also is a mechanism that instructs CM to use the plain
1842 :     environment hash as a module's pid (effectively making its GUID
1843 :     the empty string). For this, "noguid" must be specified as an
1844 :     option to the .sml file in question within its .cm file.
1845 :     This is most useful for code that is being generated by tools such
1846 :     as ml-nlffigen (because during development programmers tend to
1847 :     erase the tool's entire output directory tree including CM's cached
1848 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
1849 :     revert to the old, broken behavior of SML/NJ, but in specific cases
1850 :     where there is no danger of interface confusion, its use is ok
1851 :     (I think).
1852 :    
1853 :     ml-nlffigen by default generates "noguid" annotations. They can be
1854 :     turned off by specifying -guid in its command line.
1855 :    
1856 :     ----------------------------------------------------------------------
1857 : george 1136 Name: Lal George
1858 :     Date: 2002/03/12 12 14:42:36 EST
1859 :     Tag: george-20020312-frequency-computation
1860 :     Description:
1861 :    
1862 :     Integrated jump chaining and static block frequency into the
1863 :     compiler. More details and numbers later.
1864 : leunga 1025
1865 : george 1003 ----------------------------------------------------------------------
1866 : george 1133 Name: Lal George
1867 :     Date: 2002/03/11 11 22:38:53 EST
1868 :     Tag: george-20020311-jump-chain-elim
1869 :     Description:
1870 :    
1871 :     Tested the jump chain elimination on all architectures (except the
1872 :     hppa). This is on by default right now and is profitable for the
1873 :     alpha and x86, however, it may not be profitable for the sparc and ppc
1874 :     when compiling the compiler.
1875 :    
1876 :     The gc test will typically jump to a label at the end of the cluster,
1877 :     where there is another jump to an external cluster containing the actual
1878 :     code to invoke gc. This is to allow factoring of common gc invocation
1879 :     sequences. That is to say, we generate:
1880 :    
1881 :     f:
1882 :     testgc
1883 :     ja L1 % jump if above to L1
1884 :    
1885 :     L1:
1886 :     jmp L2
1887 :    
1888 :    
1889 :     After jump chain elimination the 'ja L1' instructions is converted to
1890 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
1891 :     up being implemented in their long form (if L2 is far away) using:
1892 :    
1893 :     jbe L3 % jump if below or equal to L3
1894 :     jmp L2
1895 :     L3:
1896 :     ...
1897 :    
1898 :    
1899 :     For large compilation units L2 may be far away.
1900 :    
1901 :    
1902 :     ----------------------------------------------------------------------
1903 : blume 1132 Name: Matthias Blume
1904 :     Date: 2002/03/11 13:30:00 EST
1905 :     Tag: blume-20020311-mltreeeval
1906 :     Description:
1907 :    
1908 :     A functor parameter was missing.
1909 :    
1910 :     ----------------------------------------------------------------------
1911 : leunga 1130 Name: Allen Leung
1912 : leunga 1131 Date: 2002/03/11 10:30:00 EST
1913 : leunga 1142 Tag: leunga-20020311-runtime-string0
1914 : leunga 1131 Description:
1915 :    
1916 :     The representation of the empty string now points to a
1917 :     legal null terminated C string instead of unit. It is now possible
1918 :     to convert an ML string into C string with InlineT.CharVector.getData.
1919 :     This compiles into one single machine instruction.
1920 :    
1921 :     ----------------------------------------------------------------------
1922 :     Name: Allen Leung
1923 : leunga 1130 Date: 2002/03/10 23:55:00 EST
1924 :     Tag: leunga-20020310-x86-call
1925 :     Description:
1926 :    
1927 :     Added machine generation for CALL instruction (relative displacement mode)
1928 :    
1929 :     ----------------------------------------------------------------------
1930 : blume 1128 Name: Matthias Blume
1931 :     Date: 2002/03/08 16:05:00
1932 :     Tag: blume-20020308-entrypoints
1933 :     Description:
1934 :    
1935 :     Version number bumped to 110.39.1. NEW BOOTFILES!
1936 :    
1937 :     Entrypoints: non-zero offset into a code object where execution should begin.
1938 :    
1939 :     - Added the notion of an entrypoint to CodeObj.
1940 :     - Added reading/writing of entrypoint info to Binfile.
1941 :     - Made runtime system bootloader aware of entrypoints.
1942 :     - Use the address of the label of the first function given to mlriscGen
1943 :     as the entrypoint. This address is currently always 0, but it will
1944 :     not be 0 once we turn on block placement.
1945 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
1946 :     with entry points) from mlriscGen.
1947 :    
1948 :     ----------------------------------------------------------------------
1949 : leunga 1127 Name: Allen Leung
1950 :     Date: 2002/03/07 20:45:00 EST
1951 :     Tag: leunga-20020307-x86-cmov
1952 :     Description:
1953 :    
1954 :     Bug fixes for CMOVcc on x86.
1955 :    
1956 :     1. Added machine code generation for CMOVcc
1957 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
1958 :     3. CMOVcc cannot have an immediate operand as argument.
1959 :    
1960 :     ----------------------------------------------------------------------
1961 : blume 1126 Name: Matthias Blume
1962 :     Date: 2002/03/07 16:15:00 EST
1963 :     Tag: blume-20020307-controls
1964 :     Description:
1965 :    
1966 :     This is a very large but mostly boring patch which makes (almost)
1967 :     every tuneable compiler knob (i.e., pretty much everything under
1968 :     Control.* plus a few other things) configurable via both the command
1969 :     line and environment variables in the style CM did its configuration
1970 :     until now.
1971 :    
1972 :     Try starting sml with '-h' (or, if you are brave, '-H')
1973 :    
1974 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
1975 :     implements the underlying generic mechanism.
1976 :    
1977 :     The interface to some of the existing such facilities has changed somewhat.
1978 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
1979 :     (The getFoo interface is still there for backward-compatibility, but its
1980 :     use is deprecated.)
1981 :    
1982 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
1983 :     that one can now twiddle the compiler settings when using this "batch"
1984 :     compiler.
1985 :    
1986 :     TODO items:
1987 :    
1988 :     We should go through and throw out all controls that are no longer
1989 :     connected to anything. Moreover, we should go through and provide
1990 :     meaningful (and correct!) documentation strings for those controls
1991 :     that still are connected.
1992 :    
1993 :     Currently, multiple calls to Controls.new are accepted (only the first
1994 :     has any effect). Eventually we should make sure that every control
1995 :     is being made (via Controls.new) exactly once. Future access can then
1996 :     be done using Controls.acc.
1997 :    
1998 :     Finally, it would probably be a good idea to use the getter-setter
1999 :     interface to controls rather than ref cells. For the time being, both
2000 :     styles are provided by the Controls module, but getter-setter pairs are
2001 :     better if thread-safety is of any concern because they can be wrapped.
2002 :    
2003 :     *****************************************
2004 :    
2005 :     One bug fix: The function blockPlacement in three of the MLRISC
2006 :     backpatch files used to be hard-wired to one of two possibilities at
2007 :     link time (according to the value of the placementFlag). But (I
2008 :     think) it should rather sense the flag every time.
2009 :    
2010 :     *****************************************
2011 :    
2012 :     Other assorted changes (by other people who did not supply a HISTORY entry):
2013 :    
2014 :     1. the cross-module inliner now works much better (Monnier)
2015 :     2. representation of weights, frequencies, and probabilities in MLRISC
2016 :     changed in preparation of using those for weighted block placement
2017 :     (Reppy, George)
2018 :    
2019 :     ----------------------------------------------------------------------
2020 : george 1116 Name: Lal George
2021 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
2022 :     Tag: george-20020307-weighted-block-placement
2023 :    
2024 :     Tested the weighted block placement optimization on all architectures
2025 :     (except the hppa) using AMPL to generate the block and edge frequencies.
2026 :     Changes were required in the machine properties to correctly
2027 :     categorize trap instructions. There is an MLRISC flag
2028 :     "weighted-block-placement" that can be used to enable weighted block
2029 :     placement, but this will be ineffective without block/edge
2030 :     frequencies (coming soon).
2031 :    
2032 :    
2033 :     ----------------------------------------------------------------------
2034 :     Name: Lal George
2035 : george 1116 Date: 2002/03/05 17:24:48 EST
2036 :     Tag: george-20020305-linkage-cluster
2037 :    
2038 : george 1124 In order to support the block placement optimization, a new cluster
2039 :     is generated as the very first cluster (called the linkage cluster).
2040 :     It contains a single jump to the 'real' entry point for the compilation
2041 :     unit. Block placement has no effect on the linkage cluster itself, but
2042 :     all the other clusters have full freedom in the manner in which they
2043 :     reorder blocks or functions.
2044 : george 1116
2045 :     On the x86 the typical linkage code that is generated is:
2046 :     ----------------------
2047 :     .align 2
2048 :     L0:
2049 :     addl $L1-L0, 72(%esp)
2050 : george 1124 jmp L1
2051 : george 1116
2052 :    
2053 :     .align 2
2054 :     L1:
2055 :     ----------------------
2056 :    
2057 :     72(%esp) is the memory location for the stdlink register. This
2058 :     must contain the address of the CPS function being called. In the
2059 : george 1124 above example, it contains the address of L0; before
2060 : george 1116 calling L1 (the real entry point for the compilation unit), it
2061 :     must contain the address for L1, and hence
2062 :    
2063 :     addl $L1-L0, 72(%esp)
2064 :    
2065 : george 1124 I have tested this on all architectures except the hppa.The increase
2066 :     in code size is of course negligible
2067 : george 1116
2068 :     ----------------------------------------------------------------------
2069 : leunga 1115 Name: Allen Leung
2070 :     Date: 2002/03/03 13:20:00 EST
2071 :     Tag: leunga-20020303-mlrisc-tools
2072 :    
2073 :     Added #[ ... ] expressions to mlrisc tools
2074 :    
2075 :     ----------------------------------------------------------------------
2076 : blume 1096 Name: Matthias Blume
2077 : blume 1098 Date: 2002/02/27 12:29:00 EST
2078 :     Tag: blume-20020227-cdebug
2079 :     Description:
2080 :    
2081 :     - made types in structure C and C_Debug to be equal
2082 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
2083 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
2084 :    
2085 :     ----------------------------------------------------------------------
2086 :     Name: Matthias Blume
2087 : blume 1096 Date: 2002/02/26 12:00:00 EST
2088 :     Tag: blume-20020226-ffi
2089 :     Description:
2090 :    
2091 :     1. Fixed a minor bug in CM's "noweb" tool:
2092 :     If numbering is turned off, then truly don't number (i.e., do not
2093 :     supply the -L option to noweb). The previous behavior was to supply
2094 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
2095 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
2096 :    
2097 :     2. Once again, I reworked some aspects of the FFI:
2098 :    
2099 :     A. The incomplete/complete type business:
2100 :    
2101 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
2102 :     gone!
2103 :     - ML types representing an incomplete type are now *equal* to
2104 :     ML types representing their corresponding complete types (just like
2105 :     in C). This is still safe because ml-nlffigen will not generate
2106 :     RTTI for incomplete types, nor will it generate functions that
2107 :     require access to such RTTI. But when ML code generated from both
2108 :     incomplete and complete versions of the C type meet, the ML types
2109 :     are trivially interoperable.
2110 :    
2111 :     NOTE: These changes restore the full generality of the translation
2112 :     (which was previously lost when I eliminated functorization)!
2113 :    
2114 :     B. Enum types:
2115 :    
2116 :     - Structure C now has a type constructor "enum" that is similar to
2117 :     how the "su" constructor works. However, "enum" is not a phantom
2118 :     type because each "T enum" has values (and is isomorphic to
2119 :     MLRep.Signed.int).
2120 :     - There are generic access operations for enum objects (using
2121 :     MLRep.Signed.int).
2122 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
2123 :     * The structure contains the definition of type "mlrep" (the ML-side
2124 :     representation type of the enum). Normally, mlrep is the same
2125 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
2126 :     then mlrep will be defined as a datatype -- thus facilitating
2127 :     pattern matching on mlrep values.
2128 :     ("-ec" will be suppressed if there are duplicate values in an
2129 :     enumeration.)
2130 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
2131 :     will be generated for each C enum constant xxx.
2132 :     * Conversion functions m2i and i2m convert between mlrep and
2133 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
2134 :     * Coversion functions c and ml convert between mlrep and "tag enum".
2135 :     * Access functions (get/set) fetch and store mlrep values.
2136 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
2137 :     enumerations are merged into one single enumeration represented by
2138 :     structure E_'.
2139 :    
2140 :     ----------------------------------------------------------------------
2141 : leunga 1080 Name: Allen Leung
2142 : leunga 1094 Date: 2002/02/25 04:45:00 EST
2143 :     Tag: leunga-20020225-cps-spill
2144 :    
2145 :     This is a new implementation of the CPS spill phase.
2146 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
2147 :     In case of problems, replace it with the old file spill.sml
2148 :    
2149 :     The current compiler runs into some serious performance problems when
2150 :     constructing a large record. This can happen when we try to compile a
2151 :     structure with many items. Even a very simple structure like the following
2152 :     makes the compiler slow down.
2153 :    
2154 :     structure Foo = struct
2155 :     val x_1 = 0w1 : Word32.int
2156 :     val x_2 = 0w2 : Word32.int
2157 :     val x_3 = 0w3 : Word32.int
2158 :     ...
2159 :     val x_N = 0wN : Word32.int
2160 :     end
2161 :    
2162 :     The following table shows the compile time, from N=1000 to N=4000,
2163 :     with the old compiler:
2164 :    
2165 :     N
2166 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
2167 :     MLRISC ra 0.06u 0.00s 0.05g
2168 :     (spills = 0 reloads = 0)
2169 :     TOTAL 0.63u 0.07s 0.21g
2170 :    
2171 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
2172 :     MLRISC ra 5.68u 0.59s 3.93g
2173 :     (spills = 0 reloads = 0)
2174 :     TOTAL 14.71u 0.99s 4.81g
2175 :    
2176 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
2177 :     MLRISC ra 5.54u 0.65s 3.91g
2178 :     (spills = 543 reloads = 1082)
2179 :     TOTAL 65.40u 3.13s 6.00g
2180 :    
2181 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
2182 :     MLRISC ra 0.80u 0.10s 0.55g
2183 :     (spills = 42 reloads = 84)
2184 :     TOTAL 129.42u 5.10s 4.13g
2185 :    
2186 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
2187 :     MLRISC ra 2.69u 0.27s 1.38g
2188 :     (spills = 62 reloads = 124)
2189 :     TOTAL 682.48u 19.61s 13.99g
2190 :    
2191 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
2192 :     MLRISC ra 4.96u 0.27s 2.72g
2193 :     (spills = 85 reloads = 170)
2194 :     TOTAL 2375.26u 57.21s 48.00g
2195 :    
2196 :     As you can see the old cps spill module suffers from some serious
2197 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
2198 :     instead of patching the problems up, I'm reimplementing it
2199 : leunga 1094 with a different algorithm. The new code is more modular,
2200 :     smaller when compiled, and substantially faster
2201 :     (O(n log n) time and O(n) space). Timing of the new spill module:
2202 :    
2203 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
2204 :     MLRISC ra 0.25u 0.02s 0.15g
2205 :     (spills=1 reloads=3)
2206 :     TOTAL 7.74u 0.34s 1.62g
2207 :    
2208 :     Implementation details:
2209 :    
2210 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
2211 :     number of live variables at any program point (the bandwidth)
2212 :     does not exceed a certain limit, which is determined by the
2213 :     size of the spill area.
2214 :    
2215 :     When the bandwidth is too large, we decrease the register pressure by
2216 :     packing live variables into spill records. How we achieve this is
2217 :     completely different than what we did in the old code.
2218 :    
2219 :     First, there is something about the MLRiscGen code generator
2220 :     that we should be aware of:
2221 :    
2222 :     o MLRiscGen performs code motion!
2223 :    
2224 :     In particular, it will move floating point computations and
2225 :     address computations involving only the heap pointer to
2226 :     their use sites (if there is only a single use).
2227 :     What this means is that if we have a CPS record construction
2228 :     statement
2229 :    
2230 :     RECORD(k,vl,w,e)
2231 :    
2232 :     we should never count the new record address w as live if w
2233 :     has only one use (which is often the case).
2234 :    
2235 :     We should do something similar to floating point, but the transformation
2236 :     there is much more complex, so I won't deal with that.
2237 :    
2238 :     Secondly, there are now two new cps primops at our disposal:
2239 :    
2240 :     1. rawrecord of record_kind option
2241 :     This pure operator allocates some uninitialized storage from the heap.
2242 :     There are two forms:
2243 :    
2244 :     rawrecord NONE [INT n] allocates a tagless record of length n
2245 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
2246 :     and initializes the tag.
2247 :    
2248 :     2. rawupdate of cty
2249 :     rawupdate cty (v,i,x)
2250 :     Assigns to x to the ith component of record v.
2251 :     The storelist is not updated.
2252 :    
2253 :     We use these new primops for both spilling and increment record construction.
2254 :    
2255 :     1. Spilling.
2256 :    
2257 :     This is implemented with a linear scan algorithm (but generalized
2258 :     to trees). The algorithm will create a single spill record at the
2259 :     beginning of the cps function and use rawupdate to spill to it,
2260 :     and SELECT or SELp to reload from it. So both spills and reloads
2261 :     are fine-grain operations. In contrast, in the old algorithm
2262 :     "spills" have to be bundled together in records.
2263 :    
2264 :     Ideally, we should sink the spill record construction to where
2265 :     it is needed. We can even split the spill record into multiple ones
2266 :     at the places where they are needed. But CPS is not a good
2267 :     representation for global code motion, so I'll keep it simple and
2268 :     am not attempting this.
2269 :    
2270 :     2. Incremental record construction (aka record splitting).
2271 :    
2272 :     Long records with many component values which are simulatenously live
2273 :     (recall that single use record addresses are not considered to
2274 :     be live) are constructed with rawrecord and rawupdate.
2275 :     We allocate space on the heap with rawrecord first, then gradually
2276 :     fill it in with rawupdate. This is the technique suggested to me
2277 :     by Matthias.
2278 :    
2279 :     Some restrictions on when this is applicable:
2280 :     1. It is not a VECTOR record. The code generator currently does not handle
2281 :     this case. VECTOR record uses double indirection like arrays.
2282 :     2. All the record component values are defined in the same "basic block"
2283 :     as the record constructor. This is to prevent speculative
2284 :     record construction.
2285 :    
2286 :     ----------------------------------------------------------------------
2287 :     Name: Allen Leung
2288 : leunga 1086 Date: 2002/02/22 01:02:00 EST
2289 :     Tag: leunga-20020222-mlrisc-tools
2290 :    
2291 :     Minor bug fixes in the parser and rewriter
2292 :    
2293 :     ----------------------------------------------------------------------
2294 :     Name: Allen Leung
2295 : leunga 1085 Date: 2002/02/21 20:20:00 EST
2296 :     Tag: leunga-20020221-peephole
2297 :    
2298 :     Regenerated the peephole files. Some contained typos in the specification
2299 :     and some didn't compile because of pretty printing bugs in the old version
2300 :     of 'nowhere'.
2301 :    
2302 :     ----------------------------------------------------------------------
2303 :     Name: Allen Leung
2304 : leunga 1079 Date: 2002/02/19 20:20:00 EST
2305 :     Tag: leunga-20020219-mlrisc-tools
2306 :     Description:
2307 :    
2308 :     Minor bug fixes to the mlrisc-tools library:
2309 :    
2310 :     1. Fixed up parsing colon suffixed keywords
2311 :     2. Added the ability to shut the error messages up
2312 :     3. Reimplemented the pretty printer and fixed up/improved
2313 :     the pretty printing of handle and -> types.
2314 :     4. Fixed up generation of literal symbols in the nowhere tool.
2315 :     5. Added some SML keywords to to sml.sty
2316 :    
2317 :     ----------------------------------------------------------------------
2318 :     Name: Matthias Blume
2319 : blume 1078 Date: 2002/02/19 16:20:00 EST
2320 :     Tag: blume-20020219-cmffi
2321 :     Description:
2322 :    
2323 :     A wild mix of changes, some minor, some major:
2324 :    
2325 :     * All C FFI-related libraries are now anchored under $c:
2326 :     $/c.cm --> $c/c.cm
2327 :     $/c-int.cm --> $c/internals/c-int.cm
2328 :     $/memory.cm --> $c/memory/memory.cm
2329 :    
2330 :     * "make" tool (in CM) now treats its argument pathname slightly
2331 :     differently:
2332 :     1. If the native expansion is an absolute name, then before invoking
2333 :     the "make" command on it, CM will apply OS.Path.mkRelative
2334 :     (with relativeTo = OS.FileSys.getDir()) to it.
2335 :     2. The argument will be passed through to subsequent phases of CM
2336 :     processing without "going native". In particular, if the argument
2337 :     was an anchored path, then "make" will not lose track of that anchor.
2338 :    
2339 :     * Compiler backends now "know" their respective C calling conventions
2340 :     instead of having to be told about it by ml-nlffigen. This relieves
2341 :     ml-nlffigen from one of its burdens.
2342 :    
2343 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
2344 :    
2345 :     * Export C_DEBUG and C_Debug from $c/c.cm.
2346 :    
2347 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
2348 :     subtyping relationship between incomplete pointers and their complete
2349 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
2350 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
2351 :     the pointer target type is complete. In the incomplete case, 'o
2352 :     will be instantiated with some "'c iobj" -- a type obtained by
2353 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
2354 :    
2355 :     Operations that work on both incomplete and complete pointer types are
2356 :     typed as taking an 'o ptr while operations that require the target to
2357 :     be known are typed as taking some ('t, 'c) obj ptr.
2358 :    
2359 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
2360 :     where void is an eqtype without any values. This makes it possible
2361 :     to work on voidptr values using functions meant to operate on light
2362 :     incomplete pointers.
2363 :    
2364 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
2365 :     been vastly simplified.
2366 :    
2367 :     ----------------------------------------------------------------------
2368 :     Name: Matthias Blume
2369 : blume 1076 Date: 2002/02/19 10:48:00 EST
2370 :     Tag: blume-20020219-pqfix
2371 :     Description:
2372 :    
2373 :     Applied Chris Okasaki's bug fix for priority queues.
2374 :    
2375 :     ----------------------------------------------------------------------
2376 :     Name: Matthias Blume
2377 : blume 1073 Date: 2002/02/15 17:05:00
2378 : blume 1069 Tag: Release_110_39
2379 :     Description:
2380 :    
2381 : blume 1073 Last-minute retagging is becoming a tradition... :-(
2382 :    
2383 :     This is the working release 110.39.
2384 :    
2385 :     ----------------------------------------------------------------------
2386 :     Name: Matthias Blume
2387 :     Date: 2002/02/15 16:00:00 EST
2388 :     Tag: Release_110_39-orig
2389 :     Description:
2390 :    
2391 : blume 1069 Working release 110.39. New bootfiles.
2392 :    
2393 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
2394 :     with all shells. So I retagged. -Matthias)
2395 :    
2396 : blume 1069 ----------------------------------------------------------------------
2397 :     Name: Matthias Blume
2398 : blume 1068 Date: 2002/02/15 14:17:00 EST
2399 :     Tag: blume-20020215-showbindings
2400 :     Description:
2401 :    
2402 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
2403 :     the latter can be useful for exploring what bindings are available at
2404 :     the interactive prompt. (The first function returns only the list
2405 :     of symbols that are really bound, the second prints those but also the
2406 :     ones that CM's autoloading mechanism knows about.)
2407 :    
2408 :     ----------------------------------------------------------------------
2409 :     Name: Matthias Blume
2410 : blume 1067 Date: 2002/02/15 12:08:00 EST
2411 :     Tag: blume-20020215-iptrs
2412 :     Description:
2413 :    
2414 :     Two improvements to ml-nlffigen:
2415 :    
2416 :     1. Write files only if they do not exist or if their current contents
2417 :     do not coincide with what's being written. (That is, avoid messing
2418 :     with the time stamps unless absolutely necessary.)
2419 :    
2420 :     2. Implement a "repository" mechanism for generated files related
2421 :     to "incomplete pointer types". See the README file for details.
2422 :    
2423 :     ----------------------------------------------------------------------
2424 :     Name: Matthias Blume
2425 : blume 1066 Date: 2002/02/14 11:50:00 EST
2426 :     Tag: blume-20020214-quote
2427 :     Description:
2428 :    
2429 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
2430 :     because of the new and improved tag generation scheme. (Thanks to Allen
2431 :     Leung for pointing it out.)
2432 :    
2433 :     ----------------------------------------------------------------------
2434 : george 1065 Name: Lal George
2435 :     Date: 2002/02/14 09:55:27 EST 2002
2436 :     Tag: george-20020214-isabelle-bug
2437 :     Description:
2438 :    
2439 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
2440 :     of Isabelle on the x86.
2441 :    
2442 :     From Allen:
2443 :     -----------
2444 :     I've found the problem:
2445 :    
2446 :     in ra-core.sml, I use the counter "blocked" to keep track of the
2447 :     true number of elements in the freeze queue. When the counter goes
2448 :     to zero, I skip examining the queue. But I've messed up the
2449 :     bookkeeping in combine():
2450 :    
2451 :     else ();
2452 :     case !ucol of
2453 :     PSEUDO => (if !cntv > 0 then
2454 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
2455 :     ^^^^^^^^^^^^^^^^^^^^^^^
2456 :     moveu := mergeMoveList(!movev, !moveu)
2457 :     )
2458 :     else ();
2459 :    
2460 :     combine() is called to coalesce two nodes u and v.
2461 :     I think I was thinking that if the move counts of u and v are both
2462 :     greater than zero then after they are coalesced then one node is
2463 :     removed from the freeze queue. Apparently I was thinking that
2464 :     both u and v are of low degree, but that's clearly not necessarily true.
2465 :    
2466 :    
2467 :     02/12/2002:
2468 :     Here's the patch. HOL now compiles.
2469 :    
2470 :     I don't know how this impact on performance (compile
2471 :     time or runtime). This bug caused the RA (especially on the x86)
2472 :     to go thru the potential spill phase when there are still nodes on the
2473 :     freeze queue.
2474 :    
2475 :    
2476 :    
2477 :    
2478 :     ----------------------------------------------------------------------
2479 : blume 1058 Name: Matthias Blume
2480 : blume 1064 Date: 2002/02/13 22:40:00 EST
2481 :     Tag: blume-20020213-fptr-rtti
2482 :     Description:
2483 :    
2484 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
2485 :     updates.
2486 :    
2487 :     ----------------------------------------------------------------------
2488 :     Name: Matthias Blume
2489 : blume 1063 Date: 2002/02/13 16:41:00 EST
2490 :     Tag: blume-20020213-cmlpq
2491 :     Description:
2492 :    
2493 :     Added new priority queue export symbols (which have just been added to
2494 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
2495 :     not compile and the installer would choke.)
2496 :    
2497 :     ----------------------------------------------------------------------
2498 :     Name: Matthias Blume
2499 : blume 1062 Date: 2002/02/13 16:15:00 EST
2500 :     Tag: blume-20020213-various
2501 :     Description:
2502 :    
2503 :     1. More tweaks to ml-nlffigen:
2504 :    
2505 :     - better internal datastructures (resulting in slight speedup)
2506 :     - "-match" option requires exact match
2507 :     - "localized" gensym counters (untagged structs/unions nested within
2508 :     other structs/unions or within typedefs get a fresh counter; their
2509 :     tag will be prefixed by a concatenation of their parents' tags)
2510 :     - bug fixes (related to calculation of transitive closure of types
2511 :     to be included in the output)
2512 :    
2513 :     2. Minor Basis updates:
2514 :    
2515 :     - added implementations for List.collate and Option.app
2516 :    
2517 :     ----------------------------------------------------------------------
2518 :     Name: Matthias Blume
2519 : blume 1060 Date: 2002/02/11 15:55:00 EST
2520 :     Tag: blume-20020211-gensym
2521 :     Description:
2522 :    
2523 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
2524 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
2525 :     names (ML structure names that correspond to unnamed C structs, unions,
2526 :     and enums), so that separate runs of ml-nlffigen do not clash.
2527 :    
2528 :     ----------------------------------------------------------------------
2529 :     Name: Matthias Blume
2530 : blume 1059 Date: 2002/02/11 12:05:00 EST
2531 :     Tag: blume-20020211-gensml
2532 :     Description:
2533 :    
2534 :     A quick fix for a problem with GenSML (in the pgraph-util library):
2535 :     Make generation of toplevel "local" optional. (Strictly speaking,
2536 :     signature definitions within "local" are not legal SML.)
2537 :    
2538 :     Other than that: updates to INSTALL and cm/TODO.
2539 :    
2540 :     ----------------------------------------------------------------------
2541 :     Name: Matthias Blume
2542 : blume 1058 Date: 2002/02/08 15:00:00 EST
2543 :     Tag: blume-20020208-uniquepid
2544 :     Description:
2545 :    
2546 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
2547 :    
2548 :     1. The installer (config/install.sh) has gotten smarter:
2549 :    
2550 :     - Configuration options are a bit easier to specify now
2551 :     (in config/targets).
2552 :     - Bug in recognizing .tar.bz2 files fixed.
2553 :     - Installer automatically resolves dependencies between
2554 :     configuration options (e.g., if you ask for eXene, you will
2555 :     also get cml -- regardless whether you asked for it or not).
2556 :     - Installer can run in "quieter mode" by setting the environment
2557 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
2558 :     "completely silent", though.
2559 :     - Build HashCons library as part of smlnj-lib.
2560 :    
2561 :     2. A new scheme for assigning persistent identifiers to compilation
2562 :     units (and, by extension, to types etc.) has been put into place.
2563 :     This fixes a long-standing bug where types and even dynamic values
2564 :     can get internally confused, thereby compromising type safety
2565 :     (abstraction) and dynamic correctness. See
2566 :    
2567 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
2568 :    
2569 :     for an example of how things could go wrong until now.
2570 :    
2571 :     The downside of the new scheme is that pids are not quite as
2572 :     persistent as they used to be: CM will generate a fresh pid
2573 :     for every compilation unit that it thinks it sees for the first
2574 :     time. That means that if you compile starting from a clean, fresh
2575 :     source tree at two different times, you end up with different
2576 :     binaries.
2577 :    
2578 :     Cutoff recompilation, however, has not been compromised because
2579 :     CM keeps pid information in special caches between runs.
2580 :    
2581 :     ----------------------------------------------------------------------
2582 : george 1053 Name: Lal George
2583 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
2584 :     Tag: <none>
2585 :     Description:
2586 :    
2587 :     Compilers that generate assembly code may produce global labels
2588 :     whose value is resolved at link time. The various peephole optimization
2589 :     modules did not take this in account.
2590 :    
2591 :     TODO. The Labels.addrOf function should really return an option
2592 :     type so that clients are forced to deal with this issue, rather
2593 :     than an exception being raised.
2594 :    
2595 :     ----------------------------------------------------------------------
2596 :     Name: Lal George
2597 : george 1053 Date: 2002/02/06 13:55:02 EST
2598 :     Tag: george-20020206-ra-breakup
2599 :     Description:
2600 :    
2601 :     1. A bug fix from Allen.
2602 :    
2603 :     A typo causes extra fstp %st(0)'s to be generated at compensation
2604 :     edges, which might cause stack underflow traps at runtime. This
2605 :     occurs in fft where there are extraneous fstps right before the 'into'
2606 :     trap instruction (in this case they are harmless since none of the
2607 :     integers overflow.)
2608 :    
2609 : george 1054 2. Pulled out various utility modules that were embedded in the modules
2610 : george 1053 of the register allocator. I need these modules for other purposes, but
2611 : george 1054 they are not complete enough to put into a library (just yet).
2612 : george 1053 ----------------------------------------------------------------------
2613 : blume 1049 Name: Matthias Blume
2614 :     Date: 2002/01/31 16:05:00 EST
2615 :     Tag: blume-20020131-sparc-ccalls
2616 :     Description:
2617 :    
2618 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
2619 :     of extra stack space by mistake. Fixed.
2620 :    
2621 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
2622 :    
2623 :     ----------------------------------------------------------------------
2624 : leunga 1048 Name: Allen Leung
2625 :     Date: 2002/01/30
2626 :     Tag: leunga-20020130-nowhere-bug-fix
2627 :     Description:
2628 :    
2629 :     MLRISC bug fixes:
2630 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
2631 :     2. MachineInt.fromString was negating its value.
2632 :    
2633 :     ----------------------------------------------------------------------
2634 : blume 1039 Name: Matthias Blume
2635 : blume 1047 Date: 2002/01/29
2636 :     Tag: blume-20020129-INSTALL
2637 :     Description:
2638 :    
2639 :     - Added somewhat detailed installation instructions (file INSTALL).
2640 :     - Fixed curl-detection bug in config/install.sh.
2641 :     - It is now possible to select the URL getter using the URLGETTER
2642 :     environment variable:
2643 :    
2644 :     not set / "unknown" --> automatic detection (script tries wget,
2645 :     curl, and lynx)
2646 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
2647 :     how to properly invoke them)
2648 :     other --> use $URLGETTER directly, it must take
2649 :     precisely two command-line arguments
2650 :     (source URL and destination file name)
2651 :    
2652 :     ----------------------------------------------------------------------
2653 :     Name: Matthias Blume
2654 : blume 1044 Date: 2002/01/28
2655 : blume 1045 Tag: blume-20020128-sparc-ccalls
2656 :     Description:
2657 :    
2658 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
2659 :     - Make use of the allocParam argument in sparc-c-calls.
2660 :    
2661 :     ----------------------------------------------------------------------
2662 :     Name: Matthias Blume
2663 :     Date: 2002/01/28
2664 : blume 1044 Tag: blume-20020128-allocParam
2665 :     Description:
2666 :    
2667 :     John Reppy: Changes c-calls API to accept client-callback for
2668 :     allocating extra stack space.
2669 :     me: Corresponding changes to mlriscGen (using a dummy argument that
2670 :     does not change the current behavior).
2671 :    
2672 :     ----------------------------------------------------------------------
2673 :     Name: Matthias Blume
2674 : blume 1040 Date: 2002/01/28 12:00:00
2675 :     Tag: Release_110_38
2676 :     Description:
2677 :    
2678 :     This time for real!!!
2679 :    
2680 :     ----------------------------------------------------------------------
2681 :     Name: Matthias Blume
2682 : blume 1039 Date: 2002/01/28 10:56:00 EST
2683 :     Tag: blume-20020128-retraction
2684 :     Description:
2685 :    
2686 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
2687 :     with blume-Release_110_38-retracted.)
2688 :    
2689 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
2690 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
2691 :    
2692 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
2693 :     and enums fixed. The naming of corresponding ML identifiers should
2694 :     now be consistent again.
2695 :    
2696 :     ----------------------------------------------------------------------
2697 : leunga 1038 Name: Allen Leung
2698 :     Date: 2002/01/27
2699 :     Tag: leunga-20020127-nowhere
2700 :     Description:
2701 :    
2702 :     Added a target called nowhere in the configuration scripts.
2703 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
2704 :     programs with where-clauses into legal SML code) during installation.
2705 :    
2706 :     ----------------------------------------------------------------------
2707 : blume 1036 Name: Matthias Blume
2708 : leunga 1038 Date: 2002/01/25 21:27:00 EST
2709 : blume 1039 Tag: blume-Release_110_38-retracted
2710 : blume 1037 Description:
2711 :    
2712 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
2713 :    
2714 :     README will be added later.
2715 :    
2716 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
2717 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
2718 :    
2719 : blume 1037 ----------------------------------------------------------------------
2720 :     Name: Matthias Blume
2721 : blume 1036 Date: 2002/01/25
2722 :     Tag: blume-20020125-ffi
2723 :     Description:
2724 :    
2725 :     A large number of tweaks and improvements to ml-nlffi-lib and
2726 :     ml-nlffigen:
2727 :    
2728 :     - ML represenation types have been streamlined
2729 :     - getter and setter functions work with concrete values, not abstract
2730 :     ones where possible
2731 :     - ml-nlffigen command line more flexible (see README file there)
2732 :     - some bugs have been fixed (hopefully)
2733 :    
2734 :     ----------------------------------------------------------------------
2735 : george 1034 Name: Lal George
2736 :     Date: 2002/01/24
2737 :     Tag: george-20020124-risc-ra-interface
2738 :     Description:
2739 :    
2740 :     There is a dramatic simplification in the interface to the
2741 :     register allocator for RISC architectures as a result of making
2742 :     parallel copy instructions explicit.
2743 :    
2744 :     ----------------------------------------------------------------------
2745 : blume 1028 Name: Matthias Blume
2746 : blume 1032 Date: 2002/01/22
2747 :     Tag: blume-20020122-x86-ccalls
2748 :     Description:
2749 :    
2750 :     Bug fix for c-calls on x86 (having to do with how char- and
2751 :     short-arguments are being handled).
2752 :    
2753 :     ----------------------------------------------------------------------
2754 :     Name: Matthias Blume
2755 : blume 1031 Date: 2002/01/21
2756 :     Tag: blume-20020121-ff
2757 :     Description:
2758 :    
2759 :     Another day of fiddling with the FFI...
2760 :    
2761 :     1. Bug fix/workaround: CKIT does not complain about negative array
2762 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
2763 :     (Otherwise a negative dimension would send it into an infinite loop.)
2764 :    
2765 :     2. Some of the abstract types (light objects, light pointers, most "base"
2766 :     types) in structure C are now eqtypes.
2767 :    
2768 :     3. Added constructors and test functions for NULL function pointers.
2769 :    
2770 :     ----------------------------------------------------------------------
2771 :     Name: Matthias Blume
2772 : blume 1028 Date: 2002/01/18
2773 : blume 1030 Tag: blume-20020118-ready-for-new-release
2774 :     Description:
2775 :    
2776 :     Made config/srcarchiveurl point to a new place. (Will provide boot
2777 :     files shortly.)
2778 :    
2779 :     Maybe we christen this to be 110.38?
2780 :    
2781 :     ----------------------------------------------------------------------
2782 :     Name: Matthias Blume
2783 :     Date: 2002/01/18
2784 : blume 1029 Tag: blume-20020118-more-ffifiddle
2785 :     Description:
2786 :    
2787 :     Today's FFI fiddling:
2788 :    
2789 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
2790 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
2791 :     of abstract ones.
2792 :    
2793 :     - Provided word-style bit operations etc. for "int" representation
2794 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
2795 :     and Long.
2796 :    
2797 :     ----------------------------------------------------------------------
2798 :     Name: Matthias Blume
2799 :     Date: 2002/01/18
2800 : blume 1028 Tag: blume-20020118-use-x86-fp
2801 :     Description:
2802 :    
2803 :     Now that x86-fast-fp seems to be working, I turned it back on again
2804 :     by default. (Seems to work fine now, even with the FFI.)
2805 :    
2806 :     Other than that, I added some documentation about the FFI to
2807 :     src/ml-nlffigen/README and updated the FFI test examples in
2808 :     src/ml-nlffi-lib/Tests/*.
2809 :    
2810 :     ----------------------------------------------------------------------
2811 : leunga 1025 Name: Allen Leung
2812 :     Date: 2002/01/17
2813 :     Tag: leunga-20020117-x86-fast-fp-call
2814 :     Description:
2815 :    
2816 :     1. Fixed a problem with handling return fp values when x86's fast fp
2817 :     mode is turned on.
2818 :    
2819 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
2820 :     of %f32.
2821 :    
2822 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
2823 :    
2824 :     ----------------------------------------------------------------------
2825 : blume 1021 Name: Matthias Blume
2826 :     Date: 2002/01/16
2827 :     Tag: blume-20020116-ffifiddle
2828 :     Description:
2829 :    
2830 :     More fiddling with the FFI interface:
2831 :    
2832 :     - Make constness 'c instead of rw wherever possible. This eliminates
2833 :     the need for certain explicit coercions. (However, due to ML's
2834 :     value polymorphism, there will still be many cases where explicit
2835 :     coercions are necessary. Phantom types are not the whole answer
2836 :     to modeling a subtyping relationship in ML.)
2837 :    
2838 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
2839 :    
2840 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
2841 :     clumsy workaround for varargs problem.)
2842 :    
2843 :     ----------------------------------------------------------------------
2844 : george 1016 Name: Lal George
2845 :     Date: 2002/01/15
2846 :     Tag: <none>
2847 :     Description:
2848 :    
2849 :     1. Since COPY instructions are no longer native to the architecture,
2850 :     a generic functor can be used to implement the expandCopies function.
2851 :    
2852 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
2853 :     TEXT segment.
2854 :    
2855 :     ----------------------------------------------------------------------
2856 : blume 1011 Name: Matthias Blume
2857 : blume 1015 Date: 2002/01/15
2858 :     Tag: blume-20020115-ffiupdates
2859 :     Description:
2860 :    
2861 :     1. Fix for bug resulting in single-precision float values being returned
2862 :     incorrectly from FFI calls.
2863 :    
2864 :     2. Small modifications to C FFI API:
2865 :    
2866 :     - memory-allocation routines return straight objects (no options)
2867 :     and raise an exception in out-of-memory situations
2868 :     - unsafe extensions to cast between function pointers and pointers
2869 :     from/to ints
2870 :     - added structure C_Debug as an alternative to structure C where
2871 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
2872 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
2873 :     but also takes a (possibly empty) list of existing library handles
2874 :     that the current library depends on
2875 :    
2876 :     ----------------------------------------------------------------------
2877 :     Name: Matthias Blume
2878 : blume 1011 Date: 2002/01/10
2879 :     Tag: blume-20020110-newffigen
2880 :     Description:
2881 :    
2882 :     1. Updates to portable graph code.
2883 :    
2884 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
2885 :     more scalable now so that even huge interfaces such as the one
2886 :     for GTK compile in finite time and space. :-)
2887 :     See src/ml-nlffigen/README for details on what's new.
2888 :    
2889 :     ----------------------------------------------------------------------
2890 : george 1003 Name: Lal George
2891 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
2892 :     Tag: george-20011206-rm-native-copy
2893 :     Description:
2894 :    
2895 :     Removed the native COPY and FCOPY instructions
2896 :     from all the architectures and replaced it with the
2897 :     explicit COPY instruction from the previous commit.
2898 :    
2899 :     It is now possible to simplify many of the optimizations
2900 :     modules that manipulate copies. This has not been
2901 :     done in this change.
2902 :    
2903 :     ----------------------------------------------------------------------
2904 :     Name: Lal George
2905 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
2906 :     Tag: george-20011206-mlrisc-instruction
2907 :     Description:
2908 : george 824
2909 : george 1003 Changed the representation of instructions from being fully abstract
2910 :     to being partially concrete. That is to say:
2911 :    
2912 :     from
2913 :     type instruction
2914 :    
2915 :     to
2916 :     type instr (* machine instruction *)
2917 :    
2918 :     datatype instruction =
2919 :     LIVE of {regs: C.cellset, spilled: C.cellset}
2920 :     | KILL of {regs: C.cellset, spilled: C.cellset}
2921 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
2922 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
2923 :     | INSTR of instr
2924 :    
2925 :     This makes the handling of certain special instructions that appear on
2926 :     all architectures easier and uniform.
2927 :    
2928 :     LIVE and KILL say that a list of registers are live or killed at the
2929 :     program point where they appear. No spill code is generated when an
2930 :     element of the 'regs' field is spilled, but the register is moved to
2931 :     the 'spilled' (which is present, more for debugging than anything else).
2932 :    
2933 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
2934 :     We used to generate:
2935 :    
2936 :     DEFFREG f1
2937 :     f1 := f2 + f3
2938 :     trapb
2939 :    
2940 :     but now generate:
2941 :    
2942 :     f1 := f2 + f3
2943 :     trapb
2944 :     LIVE {regs=[f1,f2,f3], spilled=[]}
2945 :    
2946 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
2947 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
2948 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
2949 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
2950 :     this architecture).
2951 :    
2952 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
2953 :     all the architectures. This will result in further simplification of the
2954 :     register allocator that must be aware of them for coalescing purposes, and
2955 :     will also simplify certain aspects of the machine description that provides
2956 :     callbacks related to parallel copies.
2957 :    
2958 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
2959 :     machine instruction set!
2960 :    
2961 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
2962 :     functions for making porting easier -- essentially converting upper case
2963 :     to lower case. All machine instructions (of type instr) are in upper case,
2964 :     and the lower case form generates an MLRISC instruction. For example on
2965 :     the alpha we have:
2966 :    
2967 :     datatype instr =
2968 :     LDA of {r:cell, b:cell, d:operand}
2969 :     | ...
2970 :    
2971 :     val lda : {r:cell, b:cell, d:operand} -> instruction
2972 :     ...
2973 :    
2974 :     where lda is just (INSTR o LDA), etc.
2975 :    
2976 : leunga 815 ----------------------------------------------------------------------
2977 : blume 986 Name: Matthias Blume
2978 : blume 993 Date: 2001/11/22 21:40:00 EST
2979 :     Tag: Release_110_37
2980 :     Description:
2981 :    
2982 :     Release 110.37. This time for real.
2983 :    
2984 :     ----------------------------------------------------------------------
2985 :     Name: Matthias Blume
2986 : blume 988 Date: 2001/11/21 16:35:00 EST
2987 :     Tag: blume-20011121-foot-in-mouth
2988 :     Description:
2989 :    
2990 :     Removed the "Release_110_37" tag because of a serious bug.
2991 :     This will be re-tagged once the bug is fixed.
2992 :    
2993 :     ----------------------------------------------------------------------
2994 :     Name: Matthias Blume
2995 : blume 987 Date: 2001/11/21 16:14:00 EST
2996 :     Tag: blume-20011121-forgottenfile
2997 :     Description:
2998 :    
2999 :     Forgot to add a file. (Just a .tex-file -- part of
3000 :     the CM manual source.)
3001 :    
3002 :     ----------------------------------------------------------------------
3003 :     Name: Matthias Blume
3004 : blume 986 Date: 2001/11/21 16:10:00 EST
3005 : blume 988 Tag: blume-20011121-invalid_110_37
3006 : blume 986 Description:
3007 :    
3008 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
3009 :     because we found a serious bug in all non-x86 backends.
3010 :     - Matthias
3011 :    
3012 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
3013 :     so that code object name strings are directly inserted into code
3014 :     objects at code generation time. The only business the runtime system
3015 :     has with this is now to read the name strings on occasions.
3016 :     (The encoding of the name string has also changed somewhat.)
3017 :    
3018 :     2. CM now implements a simple "set calculus" for specifying export lists.
3019 :     In particular, it is now possible to refer to the export lists of
3020 :     other libraries/groups/sources and form unions as well as differences.
3021 :     See the latest CM manual for details.
3022 :    
3023 :     3. An separate notion of "proxy" libraries has again be eliminated from
3024 :     CM's model. (Proxy libraries are now simply a special case of using
3025 :     the export list calculus.)
3026 :    
3027 :     4. Some of the existing libraries now take advantage of the new set
3028 :     calculus.
3029 :     (Notice that not all libraries have been converted because some
3030 :     of the existing .cm-files are supposed to be backward compatible
3031 :     with 110.0.x.)
3032 :    
3033 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
3034 :     "General.exnMessage"! The former relies on a certain hook to be
3035 :     initialized, and that often does not happen in the stand-alone case.)
3036 :    
3037 :     ----------------------------------------------------------------------
3038 : george 984 Name: Lal George
3039 :     Date: 2001/11/21 13:56:18 EST
3040 :     Tag: george-2001121-pseudo-ops
3041 :     Description:
3042 :    
3043 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
3044 :     ought to never be any question of incompatabilities with
3045 :     pseudo-op syntax expected by host assemblers.
3046 :    
3047 :     For now, only modules supporting GAS syntax are implemented
3048 :     but more should follow, such as MASM, and vendor assembler
3049 :     syntax, e.g. IBM as, Sun as, etc.
3050 :    
3051 :     ----------------------------------------------------------------------
3052 : blume 977 Name: Matthias Blume
3053 :     Date: 2001/11/14 11:52:00 EST
3054 :     Tag: blume-20011114-srcname
3055 :     Description:
3056 :    
3057 :     1. Routed the name of the current source file to mlriscgen where it
3058 :     should be directly emitted into the code object. (This last part
3059 :     is yet to be done.)
3060 :    
3061 :     2. Some cleanup of the pgraph code to make it match the proposal that
3062 :     I put out the other day. (The proposal notwithstanding, things are
3063 :     still in flux here.)
3064 :    
3065 :     ----------------------------------------------------------------------
3066 : george 976 Name: Lal George
3067 :     Date: 2001/11/14 09:44:04 EST
3068 :     Tag:
3069 :     Description:
3070 :    
3071 :     Fix for a backpatching bug reported by Allen.
3072 :    
3073 :     Because the boundary between short and long span-dependent
3074 :     instructions is +/- 128, there are an astounding number of
3075 :     span-dependent instructions whose size is over estimated.
3076 :    
3077 :     Allen came up with the idea of letting the size of span
3078 :     dependent instructions be non-monotonic, for a maxIter
3079 :     number of times, after which the size must be monotonically
3080 :     increasing.
3081 :    
3082 :     This table shows the number of span-dependent instructions
3083 :     whose size was over-estimated as a function of maxIter, for the
3084 :     file Parse/parse/ml.grm.sml:
3085 :    
3086 :     maxIter # of instructions:
3087 :     10 687
3088 :     20 438
3089 :     30 198
3090 :     40 0
3091 :    
3092 :     In compiling the compiler, there is no significant difference in
3093 :     compilation speed between maxIter=10 and maxIter=40. Actually,
3094 :     my measurements showed that maxIter=40 was a tad faster than
3095 :     maxIter=10! Also 96% of the files in the compiler reach a fix
3096 :     point within 13 iterations, so fixing maxIter at 40, while high,
3097 :     is okay.
3098 :    
3099 :     ----------------------------------------------------------------------
3100 : blume 975 Name: Matthias Blume
3101 :     Date: 2001/10/31 15:25:00 EST
3102 :     Tag: blume-20011031-pgraph
3103 :     Description:
3104 :    
3105 :     CKIT:
3106 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
3107 :     argument identifiers.
3108 :     * Changed the return type of TypeUtil.getFunction accordingly.
3109 :     * Type equality ignores the argument names.
3110 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
3111 :     if there is a mismatch.
3112 :    
3113 :     installation script:
3114 :     * attempts to use "curl" if available (unless "wget" is available as well)
3115 :    
3116 :     CM:
3117 :     * has an experimental implementation of "portable graphs" which I will
3118 :     soon propose as an implementation-independent library format
3119 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
3120 :    
3121 :     NLFFI-LIB:
3122 :     * some cleanup (all cosmetic)
3123 :    
3124 :     NLFFIGEN:
3125 :     * temporarily disabled the mechanism that suppresses ML output for
3126 :     C definitions whose identifiers start with an underscore character
3127 :     * generate val bindings for enum constants
3128 :     * user can request that only one style (light or heavy) is being used;
3129 :     default is to use both (command-line arguments: -heavy and -light)
3130 :     * fixed bug in handling of function types involving incomplete pointers
3131 :     * generate ML entry points that take record arguments (i.e., using
3132 :     named arguments) for C functions that have a prototype with named
3133 :     arguments
3134 :     (see changes to CKIT)
3135 :    
3136 :     ----------------------------------------------------------------------
3137 : leunga 972 Name: Allen Leung
3138 :     Date: 2001/10/27 20:34:00 EDT
3139 :     Tag: leunga-20011027-x86-fast-fp-call
3140 :     Description:
3141 :    
3142 :     Fixed the bug described in blume-20010920-slowfp.
3143 :    
3144 :     The fix involves
3145 :     1. generating FCOPYs in FSTP in ia32-svid
3146 :     2. marking a CALL with the appropriate annotation
3147 :    
3148 :     ----------------------------------------------------------------------
3149 : blume 961 Name: Matthias Blume
3150 :     Date: 2001/10/16 11:32:00 EDT
3151 :     Tag: blume-20011016-netbsd
3152 :     Description:
3153 :    
3154 :     Underscore patch from Chris Richards (fixing problem with compiling
3155 :     runtime system under recent NetBSD).
3156 :    
3157 :     ----------------------------------------------------------------------
3158 : george 959 Name: Allen Leung
3159 :     Date: 2001/10/12 17:18:32 EDT 2001
3160 :     Tag: leung-20011012-x86-printflowgraph
3161 :     Description:
3162 :    
3163 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
3164 :    
3165 :     ----------------------------------------------------------------------
3166 : george 952 Name: Lal George
3167 : george 958 Date: 2001/10/11 23:51:34 EDT
3168 :     Tag: george-20011011-too-many-instrs
3169 :     Description:
3170 :    
3171 :     The representation of a program point never expected to see more
3172 :     than 65536 instructions in a basic block!
3173 :    
3174 :     ----------------------------------------------------------------------
3175 :     Name: Lal George
3176 : george 952 Date: 2001/10/09 09:41:37 EDT
3177 :     Tag: george-20011008-mlrisc-labels
3178 :     Description:
3179 :    
3180 :     Changed the machine description files to support printing of
3181 :     local and global labels in assembly code, based on host assembler
3182 :     conventions.
3183 :    
3184 :     ----------------------------------------------------------------------
3185 : blume 916 Name: Matthias Blume
3186 : blume 939 Date: 2001/09/25 15:25:00 EDT
3187 :     Tag: blume-20010925-exninfo
3188 :     Description:
3189 :    
3190 :     I provided a non-hook implementation of exnName (at the toplevel) and
3191 :     made the "dummy" implementation of exnMessage (at the toplevel) more
3192 :     useful: if nothing gets "hooked in", then at least you are going to
3193 :     see the exception name and a message indicating why you don't see more.
3194 :    
3195 :     [For the time being, programs that need exnMessage and want to use
3196 :     ml-build should either use General.exnMessage (strongly recommended) or
3197 :     refer to structure General at some other point so that CM sees a
3198 :     static dependency.]
3199 :    
3200 :     [Similar remarks go for "print" and "use": If you want to use their
3201 :     functionality in stand-alone programs generated by ml-build, then use
3202 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
3203 :    
3204 :     ----------------------------------------------------------------------
3205 :     Name: Matthias Blume
3206 : blume 938 Date: 2001/09/20 17:28:00 EDT
3207 :     Tag: blume-20010920-slowfp
3208 :     Description:
3209 :    
3210 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
3211 :    
3212 :     ----------------------------------------------------------------------
3213 :     Name: Matthias Blume
3214 : blume 937 Date: 2001/09/20 17:20:00 EDT
3215 :     Tag: blume-20010920-canonicalpaths
3216 :     Description:
3217 :    
3218 :     0. Updated the BOOT file (something that I forgot to do earlier).
3219 :    
3220 :     1. Small internal change to CM so that it avoids "/../" in filenames
3221 :     as much as possible (but only where it is safe).
3222 :    
3223 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
3224 :     that arguments that contain delimiters are passed through correctly.
3225 :     This change also means that all "special" arguments of the form
3226 :     @SMLxxx... must come first.
3227 :    
3228 :     3. Changed install script to put relative anchor names for tool commands
3229 :     into pathconfig.
3230 :    
3231 :     ----------------------------------------------------------------------
3232 :     Name: Matthias Blume
3233 : blume 932 Date: 2001/09/18 15:35:00 EDT
3234 :     Tag: blume-20010918-readme11036
3235 :     Description:
3236 :    
3237 :     Added README files.
3238 :    
3239 :     ----------------------------------------------------------------------
3240 :     Name: Matthias Blume
3241 : blume 929 Date: 2001/09/18 11:45:00 EDT
3242 :     Tag: Release_110_36 (retag)
3243 :     Description:
3244 :    
3245 :     Fixed mistake in config/preloads. Retagged as 110.36.
3246 :    
3247 :     ----------------------------------------------------------------------
3248 :     Name: Matthias Blume
3249 : blume 928 Date: 2001/09/18 09:40:00 EDT
3250 : blume 929 Tag: Release_110_36_orig (tag changed)
3251 : blume 928 Description:
3252 :    
3253 :     New version (110.36). New bootfiles.
3254 :    
3255 :     ----------------------------------------------------------------------
3256 :     Name: Matthias Blume
3257 : blume 927 Date: 2001/09/14 16:15:00 EDT
3258 :     Tag: blume-20010914-x86fastfp
3259 :     Description:
3260 :    
3261 :     John committed some changes that Allen made, in particular a (hopefully)
3262 :     correctly working version of the x86-fp module.
3263 :    
3264 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
3265 :     flag to "true". Everything seems to compile to a fixpoint ok, and
3266 :     "mandelbrot" speeds up by about 15%.
3267 :    
3268 :     ----------------------------------------------------------------------
3269 :     Name: Matthias Blume
3270 : blume 923 Date: 2001/09/13 11:20:00 EDT
3271 :     Tag: blume-20010913-minimal
3272 :     Description:
3273 :    
3274 :     1. Stefan Monnier's patch to fix a miscompilation problem that
3275 :     was brought to light by John Reppy's work on Moby.
3276 :    
3277 :     2. Implemented a minimal "structure Compiler" that contains just
3278 :     "version" and "architecture". The minimal version will be
3279 :     available when the full version is not. This is for backward-
3280 :     compatibility with code that wants to test Compiler.version.
3281 :    
3282 :     ----------------------------------------------------------------------
3283 :     Name: Matthias Blume
3284 : blume 920 Date: 2001/08/28 14:03:00 EDT
3285 :     Tag: blume-20010828-ml-lex
3286 :     Description:
3287 :    
3288 :     Fix for bug 1581, received from Neophytos Michael.
3289 :    
3290 :     ----------------------------------------------------------------------
3291 :     Name: Matthias Blume
3292 : blume 918 Date: 2001/08/27 11:20:00 EDT
3293 :     Tag: blume-20010827-readme11035
3294 :     Description:
3295 :    
3296 :     Fleshed out the README file for 110.35.
3297 :    
3298 :     ----------------------------------------------------------------------
3299 :     Name: Matthias Blume
3300 : blume 916 Date: 2001/08/24 17:10:00 EDT
3301 :     Tag: Release_110_35
3302 :     Description:
3303 :    
3304 :     New version number (110.35). New bootfiles.
3305 :    
3306 :     ----------------------------------------------------------------------
3307 : george 915 Name: Lal George
3308 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
3309 :     Tag: george-20010824-MLRISC-graphs
3310 :     Description:
3311 :    
3312 :     removed clusters from MLRISC completely and replaced with graphs.
3313 :    
3314 :     ----------------------------------------------------------------------
3315 :     Name: Matthias Blume
3316 : blume 905 Date: 2001/08/23 17:50:00 EDT
3317 :     Tag: blume-20010823-toplevel
3318 :     Description:
3319 :    
3320 :     - some reorganization of the code that implements various kinds of
3321 :     environments in the compiler (static, dynamic, symbolic, combined)
3322 :     - re-implemented the EnvRef module so that evalStream works properly
3323 :     (if the stream contains references to "use", "CM.make", etc.)
3324 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
3325 :    
3326 :     ----------------------------------------------------------------------
3327 :     Name: Matthias Blume
3328 : blume 904 Date: 2001/08/20 15:50 EDT
3329 :     Tag: blume20010820-slipup
3330 :     Description:
3331 :    
3332 :     I forgot to commit a few files. Here they are...
3333 :    
3334 :     ----------------------------------------------------------------------
3335 :     Name: Matthias Blume
3336 : blume 903 Date: 2001/08/20 15:35:00 EDT
3337 :     Tag: blume-20010820-debugprof
3338 :     Description:
3339 :    
3340 :     !!!! NEW BOOTFILES !!!!
3341 :    
3342 :     This is another round of reorganizing the compiler sources. This
3343 :     time the main goal was to factor out all the "instrumentation"
3344 :     passes (for profiling and backtracing) into their own library.
3345 :     The difficulty was to do it in such a way that it does not depend
3346 :     on elaborate.cm but only on elabdata.cm.
3347 :    
3348 :     Therefore there have been further changes to both elaborate.cm and
3349 :     elabdata.cm -- more "generic" things have been moved from the former
3350 :     to the latter. As a result, I was forced to split the assignment
3351 :     of numbers indicating "primtyc"s into two portions: SML-generic and
3352 :     SML/NJ-specific. Since it would have been awkward to maintain,
3353 :     I bit the bullet and actually _changed_ the mapping between these
3354 :     numbers and primtycs. The bottom line of this is that you need
3355 :     a new set of bin- and bootfiles.
3356 :    
3357 :     I have built new bootfiles for all architectures, so doing a fresh
3358 :     checkout and config/install.sh should be all you need.
3359 :    
3360 :     The newly created library's name is
3361 :    
3362 :     $smlnj/viscomp/debugprof.cm
3363 :    
3364 :     and its sources live under
3365 :    
3366 :     src/compiler/DebugProf
3367 :    
3368 :     ----------------------------------------------------------------------
3369 :     Name: Matthias Blume
3370 : blume 902 Date: 2001/08/15 17:15:00 EDT
3371 :     Tag: blume-20010815-compreorg
3372 :     Description:
3373 :    
3374 :     This is a first cut at reorganizing the CM libraries that make up the
3375 :     core of the compiler. The idea is to separate out pieces that could
3376 :     be used independently by tools, e.g., the parser, the typechecker, etc.
3377 :    
3378 :     The current status is a step in this direction, but it is not quite
3379 :     satisfactory yet. Expect more changes in the future.
3380 :    
3381 :     Here is the current (new) organization...
3382 :    
3383 :     What used to be $smlnj/viscomp/core.cm is now divided into
3384 :     six CM libraries:
3385 :    
3386 :     $smlnj/viscomp/basics.cm
3387 :     /parser.cm
3388 :     /elabdata.cm
3389 :     /elaborate.cm
3390 :     /execute.cm
3391 :     /core.cm
3392 :    
3393 :     The CM files for these libraries live under src/system/smlnj/viscomp.
3394 :     All these libraries are proxy libraries that contain precisely
3395 :     one CM library component. Here are the locations of the components
3396 :     (all within the src/compiler tree):
3397 :    
3398 :     Basics/basics.cm
3399 :     Parse/parser.cm
3400 :     ElabData/elabdata.cm
3401 :     Elaborator/elaborate.cm
3402 :     Execution/execute.cm
3403 :     core.cm
3404 :    
3405 :     [This organization is the same that has been used already
3406 :     for a while for the architecture-specific parts of the visible
3407 :     compiler and for the old version of core.cm.]
3408 :    
3409 :     As you will notice, many source files have been moved from their
3410 :     respective original locations to a new home in one of the above
3411 :     subtrees.
3412 :    
3413 :     The division of labor between the new libraries is the following:
3414 :    
3415 :     basics.cm:
3416 :     - Simple, basic definitions that pertain to many (or all) of
3417 :     the other libraries.
3418 :     parser.cm:
3419 :     - The SML parser, producing output of type Ast.dec.
3420 :     - The type family for Ast is also defined and exported here.
3421 :     elabdata.cm:
3422 :     - The datatypes that describe input and output of the elaborator.
3423 :     This includes types, absyn, and static environments.
3424 :     elaborator.cm:
3425 :     - The SML/NJ type checker and elaborator.
3426 :     This maps an Ast.dec (with a given static environment) to
3427 :     an Absyn.dec (with a new static environment).
3428 :     - This libraries implements certain modules that used to be
3429 :     structures as functors (to remove dependencies on FLINT).
3430 :     execute.cm:
3431 :     - Everything having to do with executing binary code objects.
3432 :     - Dynamic environments.
3433 :     core.cm:
3434 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
3435 :     - Top-level modules.
3436 :     - FLINT (this should eventually become its own library)
3437 :    
3438 :     Notes:
3439 :    
3440 :     I am not 100% happy with the way I separated the elaborator (and its
3441 :     data structures) from FLINT. Two instances of the same problem:
3442 :    
3443 :     1. Data structures contain certain fields that carry FLINT-specific
3444 :     information. I hacked around this using exn and the property list
3445 :     module from smlnj-lib. But the fact that there are middle-end
3446 :     specific fields around at all is a bit annoying.
3447 :    
3448 :     2. The elaborator calculates certain FLINT-related information. I tried
3449 :     to make this as abstract as I could using functorization, but, again,
3450 :     the fact that the elaborator has to perform calculations on behalf
3451 :     of the middle-end at all is not nice.
3452 :    
3453 :     3. Having to used exn and property lists is unfortunate because it
3454 :     weakens type checking. The other alternative (parameterizing
3455 :     nearly *everything*) is not appealing, though.
3456 :    
3457 :     I removed the "rebinding =" warning hack because due to the new organization
3458 :     it was awkward to maintain it. As a result, the compiler now issues some of
3459 :     these warnings when compiling init.cmi during bootstrap compilation. On
3460 :     the plus side, you also get a warning when you do, for example:
3461 :     val op = = Int32.+
3462 :     which was not the case up to now.
3463 :    
3464 :     I placed "assign" and "deref" into the _Core structure so that the
3465 :     code that deals with the "lazy" keyword can find them there. This
3466 :     removes the need for having access to the primitive environment
3467 :     during elaboration.
3468 :    
3469 :     ----------------------------------------------------------------------
3470 :     Name: Matthias Blume
3471 : blume 898 Date: 2001/08/13
3472 :     Tag: blume-20010813-closures
3473 :     Description:
3474 :    
3475 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
3476 :     performance of certain loops by avoiding needless closure allocation.
3477 :    
3478 :     ----------------------------------------------------------------------
3479 : george 890 Name: Lal George
3480 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
3481 :     Tag: george-20010731-x86-fmalloc
3482 :     Description: Fixed bug in x86 calls
3483 :    
3484 :     There was a bug where call instructions would mysteriously
3485 :     vanish. The call instruction had to be one that returned
3486 :     a floating point value.
3487 :    
3488 :     ----------------------------------------------------------------------
3489 :     Name: Lal George
3490 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
3491 :     Tag: george-20010719-simple-cells
3492 :     Description:
3493 :    
3494 :     I have dramatically simplified the interface for CELLS in MLRISC.
3495 :    
3496 :     In summary, the cells interface is broken up into three parts:
3497 :    
3498 :     1. CellsBasis : CELLS_BASIS
3499 :    
3500 :     CellsBasis is a top level structure and common for all
3501 :     architectures. it contains the definitions of basic datatypes
3502 :     and utility functions over these types.
3503 :    
3504 :     2. functor Cells() : CELLS
3505 :    
3506 :     Cells generates an interface for CELLS that incorporates the
3507 :     specific resources on the target architecture, such as the
3508 :     presence of special register classes, their number and size,
3509 :     and various useful substructures.
3510 :    
3511 :     3. <ARCH>CELLS
3512 :    
3513 :     e.g. SparcCells: SPARCCELLS
3514 :    
3515 :     <ARCH>CELLS usually contains additional bindings for special
3516 :     registers on the architecture, such as:
3517 :    
3518 :     val r0 : cell (* register zero *)
3519 :     val y : cell (* Y register *)
3520 :     val psr : cell (* processor status register *)
3521 :     ...
3522 :    
3523 :     The structure returned by applying the Cells functor is opened
3524 :     in this interface.
3525 :    
3526 :     The main implication of all this is that the datatypes for cells is
3527 :     split between CellsBasis and CELLS -- a fairly simple change for user
3528 :     code.
3529 :    
3530 :     In the old scheme the CELLS interface had a definitional binding of
3531 :     the form:
3532 :    
3533 :     signature CELLS = sig
3534 :    
3535 :     structure CellsBasis = CellsBasis
3536 :    
3537 :     ...
3538 :    
3539 :     end
3540 :    
3541 :     With all the sharing constraints that goes on in MLRISC, this old
3542 :     design quickly leads to errors such as:
3543 :    
3544 :     "structure definition spec inside of sharing ... "
3545 :    
3546 :    
3547 :     and appears to require an unacceptable amount of sharing and where
3548 :     constraint hackery.
3549 :    
3550 :     I think this error message (the interaction of definitional specs and
3551 :     sharing) requires more explanation on our web page.
3552 :    
3553 :     ----------------------------------------------------------------------
3554 : blume 826 Name: Matthias Blume
3555 : blume 879 Date: 2001/07/19 15:00:00 EDT
3556 :     Tag: blume-20010719-libreorg
3557 :     Description:
3558 :    
3559 :     This update puts together a fairly extensive but straightforward change
3560 :     to the way the libraries that implement the interactive system are
3561 :     organized:
3562 :    
3563 :     The biggest change is the elimination of structure Compiler. As a
3564 :     replacement for this structure, there is now a CM library
3565 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
3566 :     that exports all the substructures of the original structure Compiler
3567 :     directly. So instead of saying Compiler.Foo.bar one now simply
3568 :     says Foo.bar. (The CM libraries actually export a collection of
3569 :     structures that is richer than the collection of substructures of
3570 :     structure Compiler.)
3571 :    
3572 :     To make the transition smooth, there is a separate library called
3573 :     $smlnj/compiler/compiler.cm which puts together and exports the
3574 :     original structure Compiler (or at least something very close to it).
3575 :    
3576 :     There are five members of the original structure Compiler
3577 :     that are not exported directly but which instead became members
3578 :     of a new structure Backend (described by signature BACKEND). These are:
3579 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
3580 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
3581 :     architecture (: string).
3582 :    
3583 :     Structure Compiler.Version has become structure CompilerVersion.
3584 :    
3585 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
3586 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
3587 :     or x86, respectively.
3588 :     Each of these exports the same frontend structures that
3589 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
3590 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
3591 :     Hppa, PPC, Sparc, or X86, respectively.
3592 :    
3593 :     Library $smlnj/compiler/all.cm exports the union of the exports of
3594 :     $smlnj/compiler/<arch>.cm
3595 :    
3596 :     There are no structures <Arch>Compiler anymore, use
3597 :     $smlnj/compiler/<arch>.cm instead.
3598 :    
3599 :     Library host-compiler-0.cm is gone. Instead, the internal library
3600 :     that instantiates CM is now called cm0.cm. Selection of the host
3601 :     compiler (backend) is no longer done here but. (Responsibility for it
3602 :     now lies with $smlnj/compiler/current.cm. This seems to be more
3603 :     logical.)
3604 :    
3605 :     Many individual files have been moved or renamed. Some files have
3606 :     been split into multiple files, and some "dead" files have been deleted.
3607 :    
3608 :     Aside from these changes to library organization, there are also changes
3609 :     to the way the code itself is organized:
3610 :    
3611 :     Structure Binfile has been re-implemented in such a way that it no
3612 :     longer needs any knowledge of the compiler. It exclusively deals
3613 :     with the details of binfile layout. It no longer invokes the
3614 :     compiler (for the purpose of creating new prospective binfile
3615 :     content), and it no longer has any knowledge of how to interpret
3616 :     pickles.
3617 :    
3618 :     Structure Compile (: COMPILE) has been stripped down to the bare
3619 :     essentials of compilation. It no longer deals with linking/execution.
3620 :     The interface has been cleaned up considerably.
3621 :    
3622 :     Utility routines for dealing with linking and execution have been
3623 :     moved into their own substructures.
3624 :    
3625 :     (The ultimate goal of these changes is to provide a light-weight
3626 :     binfile loader/linker (at least for, e.g., stable libraries) that
3627 :     does not require CM or the compiler to be present.)
3628 :    
3629 :     CM documentation has been updated to reflect the changes to library
3630 :     organization.
3631 :    
3632 :     ----------------------------------------------------------------------
3633 :     Name: Matthias Blume
3634 : blume 875 Date: 2001/07/10 17:30:00 EDT
3635 :     Tag: Release_110_34
3636 :     Description:
3637 :    
3638 : blume 876 Minor tweak to 110.34 (re-tagged):
3639 :    
3640 :     - README.html file added to CVS repository
3641 :     - runtime compiles properly under FreeBSD 3.X and 4.X
3642 :    
3643 :     ----------------------------------------------------------------------
3644 :     Name: Matthias Blume
3645 :     Date: 2001/07/10 17:30:00 EDT
3646 :     Tag: Release_110_34
3647 :     Description:
3648 :    
3649 : blume 875 New version number (110.34). New bootfiles.
3650 :    
3651 :     ----------------------------------------------------------------------
3652 :     Name: Matthias Blume
3653 : blume 874 Date: 2001/07/09 16:00:00 EDT
3654 :     Tag: blume-20010709-more-varargs
3655 :     Description:
3656 :    
3657 :     I changed the handling of varargs in ml-nlffigen again:
3658 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
3659 :    
3660 :     The immediate effect is that you can actually call a varargs function
3661 :     from ML -- but you can't actually supply any arguments beyond the ones
3662 :     specified explicitly. (For example, you can call printf with its format
3663 :     string, but you cannot pass additional arguments.)
3664 :    
3665 :     This behavior is only marginally more useful than the one before, but
3666 :     it has the advantage that a function or, more importantly, a function
3667 :     type never gets dropped on the floor, thus avoiding follow-up problems with
3668 :     other types that refer to the offending one.
3669 :    
3670 :     ----------------------------------------------------------------------
3671 :     Name: Matthias Blume
3672 : blume 873 Date: 2001/07/09 11:25:00 EDT
3673 :     Tag: blume-20010709-varargs
3674 :     Description:
3675 :    
3676 :     1. ckit-lib.cm now exports structure Error
3677 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
3678 :     with a warning accompanied by a source location. Moreover, it
3679 :     merely skips the offending function or type and proceeds with the
3680 :     rest of its work.u As a result, one can safely feed C code containing
3681 :     "..." to ml-nlffigen.
3682 :     3. There are some internal improvements to CM, providing slightly
3683 :     more general string substitutions in the tools subsystem.
3684 :    
3685 :     ----------------------------------------------------------------------
3686 :     Name: Matthias Blume
3687 : blume 854 Date: 2001/06/27 15:10:00 EDT
3688 :     Tag: blume-20010627-concur
3689 :     Description:
3690 :    
3691 :     Fixed a small bug in CM's handling of parallel compilation.
3692 :     (You could observe the bug by Control-C-interrupting an ordinary
3693 :     CMB.make or CM.stabilize and then attaching some compile servers.
3694 :     The result was that all of a sudden the previously interrupted
3695 :     compilation would continue on its own. This was because of
3696 :     an over-optimization: CM did not bother to clean out certain queues
3697 :     when no servers were attached "anyway", resulting in the contents
3698 :     of these queues to grab control when new servers did get attached.)
3699 :    
3700 :     There is also another minor update to the CM manual.
3701 :    
3702 :     ----------------------------------------------------------------------
3703 :     Name: Matthias Blume
3704 : blume 853 Date: 2001/06/26 16:15:00 EDT
3705 :     Tag: blume-20010626-cmdoc
3706 :     Description:
3707 :    
3708 :     Minor typo fixed in CM manual (syntax diagram for libraries).
3709 :    
3710 :     ----------------------------------------------------------------------
3711 :     Name: Matthias Blume
3712 : blume 852 Date: 2001/06/25 22:55:00 EDT
3713 :     Tag: blume-20010625-x86pc
3714 :     Description:
3715 :    
3716 :     Fixed a nasty bug in the X86 assembly code that caused signal
3717 :     handlers to fail (crash) randomly.
3718 :    
3719 :     ----------------------------------------------------------------------
3720 :     Name: Matthias Blume
3721 : blume 846 Date: 2001/06/25 12:05:00 EDT
3722 :     Tag: blume-20010625-nlffigen
3723 :     Description:
3724 :    
3725 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
3726 :     Nick Carter <nbc@andrew.cmu.edu>.
3727 :    
3728 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
3729 :     2. Default names for generated files are now derived from the name of
3730 :     the C file *without its directory*. In particular, this causes generated
3731 :     files to be placed locally even if the C file is in some system directory.
3732 :     3. Default names for generated signatures and structures are also derived
3733 :     from the C file name without its directory. This avoids silly things
3734 :     like "structure GL/GL".
3735 :     (Other silly names are still possible because ml-nlffigen does not do
3736 : blume 847 a thorough check of whether generated names are legal ML identifiers.
3737 :     When in doubt, use command line arguments to force particular names.)
3738 : blume 846
3739 :     ----------------------------------------------------------------------
3740 :     Name: Matthias Blume
3741 : blume 845 Date: 2001/06/21 12:25:00 EDT
3742 :     Tag: blume-20010621-eXene
3743 :     Description:
3744 :    
3745 :     eXene now compiles and (sort of) works again.
3746 :    
3747 :     The library name (for version > 110.33) is $/eXene.cm.
3748 :    
3749 :     I also added an new example in src/eXene/examples/nbody. See the
3750 :     README file there for details.
3751 :    
3752 :     ----------------------------------------------------------------------
3753 :     Name: Matthias Blume
3754 : blume 844 Date: 2001/06/20 16:40:00 EDT
3755 :     Tag: blume-20010620-cml
3756 :     Description:
3757 :    
3758 :     CML now compiles and works again.
3759 :    
3760 :     Libraries (for version > 110.33):
3761 :    
3762 :     $cml/cml.cm Main CML library.
3763 :     $cml/basis.cm CML's version of $/basis.cm.
3764 :     $cml/cml-internal.cm Internal helper library.
3765 :     $cml/core-cml.cm Internal helper library.
3766 :     $cml-lib/trace-cml.cm Tracing facility.
3767 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
3768 :    
3769 :     The installer (config/install.sh) has been taught how to properly
3770 :     install this stuff.
3771 :    
3772 :     ----------------------------------------------------------------------
3773 :     Name: Matthias Blume
3774 : blume 843 Date: 2001/06/19 17:55:00 EDT
3775 :     Tag: blume-20010619-instantiate
3776 :     Description:
3777 :    
3778 :     This un-breaks the fix for bug 1432.
3779 :     (The bug was originally fixed in 110.9 but I broke it again some
3780 :     time after that.)
3781 :    
3782 :     ----------------------------------------------------------------------
3783 :     Name: Matthias Blume
3784 : blume 842 Date: 2001/06/19 17:25:00 EDT
3785 :     Tag: blume-20010619-signals
3786 :     Description:
3787 :    
3788 :     This should (hopefully) fix the long-standing signal handling bug.
3789 :     (The runtime system was constructing a continuation record with an
3790 :     incorrect descriptor which would cause the GC to drop data on the floor...)
3791 :    
3792 :     ----------------------------------------------------------------------
3793 :     Name: Matthias Blume
3794 : blume 840 Date: 2001/06/15 15:05:00 EDT
3795 : blume 841 Tag: blume-20010615-moresparc
3796 :     Description:
3797 :    
3798 :     Here is a short late-hour update related to Sparc c-calls:
3799 :    
3800 :     -- made handling of double-word arguments a bit smarter
3801 :    
3802 :     -- instruction selection phase tries to collapse certain clumsily
3803 :     constructed ML-Trees; typical example:
3804 :    
3805 :     ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
3806 :    
3807 :     This currently has no further impact on SML/NJ since mlriscGen does
3808 :     not seem to generate such patterns in the first place, and c-calls
3809 :     (which did generate them in the beginning) has meanwhile been fixed
3810 :     so as to avoid them as well.
3811 :    
3812 :     ----------------------------------------------------------------------
3813 :     Name: Matthias Blume
3814 :     Date: 2001/06/15 15:05:00 EDT
3815 : blume 840 Tag: blume-20010615-sparc
3816 :     Description:
3817 :    
3818 :     The purpose of this update is to provide an implementation of NLFFI
3819 :     on Sparc machines.
3820 :    
3821 :     Here are the changes in detail:
3822 :    
3823 :     * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
3824 :     the Sparc implementation of the c-calls API.
3825 :     * The Sparc backend of SML/NJ has been modified to uniformely use %fp
3826 :     for accessing the ML frame. Thus, we have a real frame pointer and
3827 :     can freely modify %sp without need for an omit-frame-ptr phase.
3828 :     The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
3829 :     this case.
3830 :     * ml-nlffigen has been taught to produce code for different architectures
3831 :     and calling conventions.
3832 :     * In a way similar to what was done in the x86 case, the Sparc
3833 :     backend uses its own specific extension to mltree. (For example,
3834 :     it needs to be able to generate UNIMP instructions which are part
3835 :     of the calling convention.)
3836 :     * ml-nlffi-lib was reorganized to make it more modular (in particular,
3837 :     to make it easier to plug in new machine- and os-dependent parts).
3838 :    
3839 :     There are some other fairly unrelated bug fixes and cleanups as well:
3840 :    
3841 :     * I further hacked the .cm files for MLRISC tools (like MDLGen) so
3842 :     that they properly share their libraries with existing SML/NJ libraries.
3843 :     * I fixed a minor cosmetic bug in CM, supressing certain spurious
3844 :     follow-up error messages.
3845 :     * Updates to CM/CMB documentation.
3846 :    
3847 :     TODO items:
3848 :    
3849 :     * MLRISC should use a different register as its asmTemp on the Sparc.
3850 :     (The current %o2 is a really bad choice because it is part of the
3851 :     calling conventions, so things might interfere in unexpected ways.)
3852 :    
3853 :     ----------------------------------------------------------------------
3854 :     Name: Matthias Blume
3855 : blume 839 Date: 2001/06/07
3856 :     Tag: blume-20010607-calls
3857 :     Description:
3858 :    
3859 :     A number of internal changes related to C calls and calling conventions:
3860 :    
3861 :     1. ML-Tree CALL statements now carry a "pops" field. It indicates the
3862 :     number of bytes popped implicitly (by the callee). In most cases
3863 :     this field is 0 but on x86/win32 it is some non-zero value. This
3864 :     is information provided for the benefit of the "omit-frameptr" pass.
3865 :     2. The CALL instruction on the x86 carries a similar "pops" field.
3866 :     The instruction selection phase copies its value from the ML-Tree
3867 :     CALL statement.
3868 :     3. On all other architectures, the instruction selection phase checks
3869 :     whether "pops=0" and complains if not.
3870 :     4. The c-calls implementation for x86 now accepts two calling conventions:
3871 :     "ccall" and "stdcall". When "ccall" is selected, the caller cleans
3872 :     up after the call and pops is set to 0. For "stdcall", the caller
3873 :     does nothing, leaving the cleanup to the callee; pops is set to
3874 :     the number of bytes that were pushed onto the stack.
3875 :     5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
3876 :     distinguish between "ccall" and "stdcall".
3877 :     6. The UNIMP instruction has been added to the supported Sparc instruction
3878 :     set. (This is needed for implementing the official C calling convention
3879 :     on this architecture.)
3880 :     7. I fixed some of the .cm files under src/MLRISC/Tools to make them
3881 :     work with the latest CM.
3882 :    
3883 :     ----------------------------------------------------------------------
3884 :     Name: Matthias Blume
3885 : blume 838 Date: 2001/06/05 15:10:00 EDT
3886 :     Tag: blume-20010605-cm-index
3887 :     Description:
3888 :    
3889 :     0. The "lambdasplit" parameter for class "sml" in CM has been documented.
3890 :    
3891 :     1. CM can now generate "index files". These are human-readable files
3892 :     that list on a per-.cm-file basis each toplevel symbol defined or
3893 :     imported. The location of the index file for
3894 :     <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
3895 :     To enable index-file generation, set CM.Control.generate_index to true
3896 :     or export an environment-symbol: export CM_GENERATE_INDEX=true.
3897 :    
3898 :     The CM manual has been updated accordingly.
3899 :    
3900 :     2. I made some slight modifications to the c-calls API in MLRISC.
3901 :    
3902 :     a) There is now a callback to support saving/restoring of
3903 :     dedicated but caller-save registers around the actual call
3904 :     instruction.
3905 :     b) One can optionally specify a comment-annotation for the
3906 :     call instruction.
3907 :    
3908 :     3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
3909 :     (For example, the comment annotation shows the C prototype of
3910 :     the function being called.)
3911 :    
3912 :     ----------------------------------------------------------------------
3913 :     Name: Matthias Blume
3914 : blume 837 Date: 2001/06/01 13:30:00 EDT
3915 :     Tag: blume-20010601-nlffi-cleanup
3916 :     Description:
3917 :    
3918 :     This is mostly a cleanup of MLFFI stuff:
3919 :    
3920 :     - some signature files have been put into a more exposed place
3921 :     - the ugly 'f type parameter is gone (simplifies types tremendously!)
3922 :     - ml-nlffigen changed accordingly
3923 :     - tutorial updated
3924 :    
3925 :     Other changes:
3926 :    
3927 :     - author's affiliation in CM manual(s) updated
3928 :     - some more recognized keywords added to Allen's sml.sty
3929 :    
3930 :     ----------------------------------------------------------------------
3931 :     Name: Matthias Blume
3932 : blume 836 Date: 2001/05/25 15:30:00 EDT
3933 :     Tag: blume-20010525-iptr
3934 :     Description:
3935 :    
3936 :     - put the official 110.33-README (as it appears on the ftp server) under
3937 :     CVS
3938 :     - fixed a small bug related to incomplete pointer types in
3939 :     ml-nlffigen
3940 :     - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
3941 :     (it does not need the 'f type parameter)
3942 :    
3943 :     ----------------------------------------------------------------------
3944 :     Name: Matthias Blume
3945 : blume 834 Date: 2001/05/23 14:30:00 EDT
3946 :     Tag: Release_110_33
3947 :     Description:
3948 :    
3949 :     New version number (110.33). New bootfiles.
3950 :    
3951 :     ----------------------------------------------------------------------
3952 :     Name: Matthias Blume
3953 : blume 833 Date: 2001/05/22 18:06:00 EDT
3954 :     Tag: blume-20010522-targets
3955 :     Description:
3956 :    
3957 :     Made install.sh use file config/targets.customized if it exists, falling
3958 :     back to config/targets if it doesn't. This way one can have a customized
3959 :     version of the targets file without touching the "real thing", thus
3960 :     eliminating the constant fear of accidentally checking something bogus
3961 :     back into the CVS repository... (File config/targets.customized must
3962 :     not be added to the repository!)
3963 :    
3964 :     ----------------------------------------------------------------------
3965 :     Name: Matthias Blume
3966 : blume 832 Date: 2001/05/22 16:30:00 EDT
3967 :     Tag: blume-20010522-minitut
3968 :     Description:
3969 :    
3970 :     1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
3971 :     struct returns.
3972 :     2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt. This is some very
3973 :     incomplete, preliminary documentation for NLFFI.
3974 :    
3975 :     ----------------------------------------------------------------------
3976 :     Name: Matthias Blume
3977 : blume 829 Date: 2001/05/14 11:30:00 EDT
3978 :     Tag: blume-20010514-script
3979 :     Description:
3980 :    
3981 :     Some bugs in install script fixed.
3982 :    
3983 :     In addition to that I also made a slight change to the NLFFI API:
3984 :     Functors generated by ml-nlffigen now take the dynamic library as a
3985 :     straight functor argument, not as a suspended one. (The original
3986 :     functor code used to force the suspension right away anyway, so there
3987 :     was nothing gained by this complication of the interface.)
3988 :    
3989 :     ----------------------------------------------------------------------
3990 :     Name: Matthias Blume
3991 : blume 828 Date: 2001/05/11 14:35:00 EDT
3992 :     Tag: blume-20010511-ml-nlffi
3993 :     Description:
3994 :    
3995 :     I finally took the plunge and added my new FFI code to the main
3996 :     repository. For x86-linux it is now ready for prime-time.
3997 :    
3998 :     There are two new subdirectories of "src":
3999 :    
4000 :     - ml-nlffi-lib:
4001 :     The utility library for programs using the FFI interface.
4002 :     Here is the implementation of $/c.cm and its associated low-level
4003 :     partners $/c-int.cm and $/memory.cm.
4004 :     - ml-nlffigen:
4005 :     A stand-alone program for generating ML glue code from C source
4006 :     code.
4007 :    
4008 :     Building ml-nlffigen requires $/ckit-lib.cm.
4009 :    
4010 :     The config/install.sh script has been updates to do the Right Thing
4011 :     (hopefully).
4012 :    
4013 :     Notice that the source tree for the C-Kit will not be put under "src"
4014 :     but directly under the installation root directory. (This is the
4015 :     structure that currently exists on the CVS server when you check out
4016 :     module "sml".) Fortunately, config/install.sh knows about this oddity.
4017 :    
4018 :     Bugs: No documentation yet.
4019 :    
4020 :     ----------------------------------------------------------------------
4021 :     Name: Matthias Blume
4022 : blume 826 Date: 2001/05/09 16:35:00 EDT
4023 :     Tag: blume-20010509-cpscontract
4024 :     Description:
4025 :    
4026 :     Fixed a bug in the accounting code in cpsopt/contract.sml. (The
4027 :     wrapper/unwrapper elimination did not decrement usage counts and some
4028 :     dead variables got overlooked by the dead-up logic.)
4029 :    
4030 :     ----------------------------------------------------------------------
4031 : george 824 Name: Lal George
4032 :     Date: 2001/05/08 17:26:09 EDT
4033 :     Tag: george-20010508-omit-frameptr
4034 :     Description:
4035 :    
4036 :     Changes to implement the omit-frame-pointer optimization to support
4037 :     raw C calls. For now, there is only support on the Intel x86, but
4038 :     other architectures will follow as more experience is gained with this.
4039 :    
4040 :    
4041 :     ----------------------------------------------------------------------
4042 : blume 818 Name: Matthias Blume
4043 : blume 819 Date: 2001/05/07 14:40:00 EDT
4044 :     Tag: blume-20010507-proxies
4045 :     Description:
4046 :    
4047 :     I made into "proxy libraries" all libraries that qualify for such a
4048 :     change. (A qualifying library is a library that has another library or
4049 :     groups as its sole member and repeats that member's export list
4050 :     verbatim. A proxy library avoids this repetition by omitting its export
4051 :     list, effectively inheriting the list that its (only) member exports.
4052 :     See the CM manual for more explanation.)
4053 :     The main effect is that explicit export lists for these libraries
4054 :     do not have to be kepts in sync, making maintenance a bit easier.
4055 :    
4056 :     I also added copyright notices to many .cm-files.
4057 :    
4058 :     Last but not least, I made a new set of bootfiles.
4059 :    
4060 :     ----------------------------------------------------------------------
4061 :     Name: Matthias Blume
4062 : blume 818 Date: 2001/05/04 17:00:00 EDT
4063 :     Tag: blume-20010504-cm-lsplit
4064 :     Description:
4065 :    
4066 :     0. John merged pending changes to $/smlnj-lib.cm
4067 :    
4068 :     1. Allen's previous change accidentally backed out of one of Lal's
4069 :     earlier changes. I undid this mistake (re-introducing Lal's change).
4070 :    
4071 :     2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
4072 :     within the compiler where applicable. There is some code simplification
4073 :     because of that.
4074 :    
4075 :     3. The "split" phase (in FLINT) is now part of the default list of phases.
4076 :     Compiler.Control.LambdaSplitting.* can be used to globally control the
4077 :     lambda-splitting (cross-module-inlining) engine. In addition to that,
4078 :     it can now also be controlled on a per-source basis: CM has been taught
4079 :     a new tool parameter applicable to ML source files.
4080 :    
4081 :     - To turn lambda-splitting off completely:
4082 :     local open Compiler.Control.LambdaSplitting in
4083 :     val _ = set Off
4084 :     end
4085 :     - To make "no lambda-splitting" the global default (but allow per-source
4086 :     overriding); this is the initial setting:
4087 :     local open Compiler.Control.LambdaSplitting in
4088 :     val _ = set (Default NONE)
4089 :     end
4090 :     - To make "lambda-splitting with aggressiveness a" the global default
4091 :     (and allow per-source overriding):
4092 :     local open Compiler.Control.LambdaSplitting in
4093 :     val _ = set (Default (SOME a))
4094 :     end
4095 :    
4096 :     - To turn lambda-splitting off for a given ML souce file (say: a.sml)
4097 :     write (in the respective .cm-file):
4098 :     a.sml (lambdasplitting:off)
4099 :     - To turn lambda-splitting for a.sml on with minimal aggressiveness:
4100 :     a.sml (lambdasplitting:on)
4101 :     - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
4102 :     <a> is a decimal non-negative integer):
4103 :     a.sml (lambdasplitting:<a>)
4104 :     - To turn lambda-splitting for a.sml on with maximal aggressiveness:
4105 :     a.sml (lambdasplitting:infinity)
4106 :     - To use the global default for a.sml:
4107 :     a.sml (lambdasplitting:default)
4108 :     or simply
4109 :     a.sml
4110 :    
4111 :     ----------------------------------------------------------------------
4112 : leunga 815 Name: Allen Leung
4113 :     Date: 2001/05/04 01:57:00 EDT
4114 :     Tag: leunga-20010504-sync
4115 :     Description:
4116 : leunga 788
4117 : leunga 815 MLRISC features.
4118 :    
4119 :     1. Fix to CMPXCHG instructions.
4120 :     2. Changed RA interface to allow annotations in callbacks.
4121 :     3. Added a new method to the stream interface to allow annotations updates.
4122 :    
4123 : george 749 ----------------------------------------------------------------------
4124 : blume 812 Name: Matthias Blume
4125 : blume 814 Date: 2001/05/01 11:45:00 EDT
4126 :     Tag: blume-20010501-pcedittmp
4127 :     Description:
4128 :    
4129 :     Changed install.sh to use the current working directory instead of
4130 :     /usr/tmp for a temporary file (pcedittmp). The previous choice
4131 :     of /usr/tmp caused trouble with MacOS X because of file premission
4132 :     problems.
4133 :    
4134 :     ----------------------------------------------------------------------
4135 :     Name: Matthias Blume
4136 : blume 812 Date: 2001/04/20 11:10:00 EDT
4137 :     Tag: blume-20010420-inMLflag
4138 :     Description:
4139 :    
4140 :     - added vp_limitPtrMask to vproc-state.h
4141 :     (for use by the raw-C-calls mechanism to implement proper interrupt
4142 :     handling)
4143 :     - made the ML compiler aware of various data-structure offsets so it
4144 :     can generate code for accessing the vp_inML flag and vp_limitPtrMask
4145 :     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
4146 :     raw C-calls
4147 :    
4148 :     ----------------------------------------------------------------------
4149 : george 810 Name: Lal George
4150 :     Date: 2001/04/20 09:15:28 EDT
4151 :     Tag: george-20010420-macosX
4152 :     Description:
4153 :    
4154 :     - Changes to port to Mac OS X; Darwin.
4155 :    
4156 :     - In the process I found that sqrt was broken on the PPC, because the
4157 :     fsqrt instruction is not implemented.
4158 :    
4159 :     ----------------------------------------------------------------------
4160 : blume 799 Name: Matthias Blume
4161 : blume 808 Date: 2001/04/18 12:45:00 EDT
4162 :     Tag: blume-20010418-ccalls
4163 :     Description:
4164 :    
4165 :     - fixed two off-by-4 errors in the x86-specific c-calls implementation
4166 :     (this bug prevented structure arguments containing pointers from being
4167 :     passed correctly)
4168 :     - changed the raw-C-call code in mlriscGen.sml in such a way that
4169 :     structure arguments are represented as a pointer to the beginning
4170 :     of the structure (instead of having a series of synthesized arguments,
4171 :     one for each structure member)
4172 :    
4173 :     - made makeml script's verbosity level configurable via environment
4174 :     variable (MAKEML_VERBOSITY)
4175 :    
4176 : blume 813 - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
4177 : blume 808 in rawmem-x86.sml; we are now using the real thing
4178 :    
4179 :     ----------------------------------------------------------------------
4180 :     Name: Matthias Blume
4181 : blume 806 Date: 2001/03/22 16:25:00 EST
4182 :     Tag: blume-20010322-bootfiles
4183 :     Description:
4184 :    
4185 :     Created a new set of bootfiles (for your automatic installation convenience).
4186 :    
4187 :     ----------------------------------------------------------------------
4188 :     Name: Matthias Blume
4189 : blume 805 Date: 2001/03/22 15:10:00 EST
4190 :     Tag: blume-20010322-rawmem-parcm
4191 :     Description:
4192 :    
4193 :     1. All "raw memory access" primitives for the new FFI are implemented now
4194 :     (at least on the x86).
4195 :     2. Some further cleanup of CM's parallel make mechanism.
4196 :    
4197 :     ----------------------------------------------------------------------
4198 :     Name: Matthias Blume
4199 : blume 801 Date: 2001/03/19 17:53:00 EST
4200 :     Tag: blume-20010319-parallel
4201 :     Description:
4202 :    
4203 :     Parallel make (using compile servers) now works again.
4204 :    
4205 :     To this end, CM.stabilize and CMB.make have been modified to work in
4206 :     two passes when compile servers are attached:
4207 :     1. Compile everything, do not perform stabilization; this pass
4208 :     uses compile servers
4209 :     2. Stabilize everything; this pass does not use compile servers
4210 :     If there are no compile servers, the two passes are combined into one
4211 :     (as before). Splitting the passes increases the inherent parallelism
4212 :     in the dependency graph because the entire graph including all
4213 :     libraries is available at the same time. This, in turn, improves
4214 :     server utilization. The downside is that the master process will
4215 :     have to do some extra work after compilation is done (because for
4216 :     technical reasons it must re-read all the binfiles during stabilization).
4217 :    
4218 :     ----------------------------------------------------------------------
4219 :     Name: Matthias Blume
4220 : blume 800 Date: 2001/03/16 12:22:00 EST
4221 :     Tag: blume-20010316-bootfiles
4222 :     Description:
4223 :    
4224 :     Created a new set of bootfiles (for your automatic installation convenience).
4225 :    
4226 :     ----------------------------------------------------------------------
4227 :     Name: Matthias Blume
4228 : blume 799 Date: 2001/03/16 11:00:00 EST
4229 :     Tag: blume-20010316-MLTREE-fixup
4230 :     Description:
4231 :    
4232 :     This is a minor fixup for an (untagged) earlier commit by Allen.
4233 :     (A file was missing).
4234 :    
4235 :     ----------------------------------------------------------------------
4236 : leunga 788 Name: Allen Leung
4237 : leunga 796 Date: Mon Mar 5 18:54:57 EST 2001
4238 :     Tag: leunga-20010305-cut-support
4239 :    
4240 :     1. New support for alternative control-flow in MLTREE.
4241 :     Currently we support
4242 :    
4243 :     FLOW_TO(CALL ...., [k1,...,kn])
4244 :    
4245 :     This is needed for 'cuts to' in C-- and try/handle-like constructs
4246 :     in Moby
4247 :    
4248 :     New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
4249 :    
4250 :     2. Register Allocator
4251 :    
4252 :     Changes in interface [from Fermin, John]
4253 :    
4254 :     3. Alpha 8-bit SLL support [Fermin]
4255 :    
4256 :     4. All architectures
4257 :    
4258 :     A new module (ClusterExpandCopies) for expanding parallel copies.
4259 :    
4260 :     ----------------------------------------------------------------------
4261 :     Name: Allen Leung
4262 : leunga 788 Date: 2001/02/27 23:07:00 EST
4263 :     Tag: leunga-20010227-minor-stuff
4264 :    
4265 :     1. Alpha bug fix for CMOVNE
4266 :     2. Handle mltree COND(..,FCMP ...,...)
4267 :     3. Bug fix in simplifier
4268 :    
4269 :     ----------------------------------------------------------------------
4270 : blume 777 Name: Matthias Blume
4271 : blume 781 Date: 2001/01/30 17:50:00 EST
4272 :     Tag: blume-20010130-sync
4273 :     Description:
4274 :    
4275 :     This is just a minor update to sync my devel branch with the main brach.
4276 :     The only visible change is the addition of some README files.
4277 :    
4278 :     ----------------------------------------------------------------------
4279 :     Name: Matthias Blume
4280 : blume 778 Date: 2001/01/12 23:30:00 JST
4281 :     Tag: blume-20010112-bootfiles
4282 :     Description:
4283 :    
4284 :     Made a new set of bootfiles that goes with the current state of the
4285 :     repository.
4286 :    
4287 :     ----------------------------------------------------------------------
4288 :     Name: Matthias Blume
4289 : blume 777 Date: 2001/01/12 21:20:00 JST
4290 :     Tag: blume-20010112-sync
4291 :     Description:
4292 :    
4293 :     I am just flushing out some minor changes that had accumulated in
4294 :     my private branch in order to sync with the main tree. (This is
4295 :     mainly because I had CVS trouble when trying to merge _into_ my
4296 :     private branch.)
4297 :    
4298 :     Most people should be completely unaffected by this.
4299 :    
4300 :     ------------------------------------------