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Annotation of /sml/branches/primop-branch-3/NOTES/HISTORY

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Original Path: sml/trunk/HISTORY

1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 : mblume 1615 Name:
11 : mblume 1480 Date: yyyy/mm/dd
12 :     Tag: <post-commit CVS tag>
13 :     Description:
14 :    
15 :     ----------------------------------------------------------------------
16 : mblume 1622 Name: Matthias Blume (blume (at) tti - c (dot) org)
17 : mblume 1652 Date: 2004/10/14 17:40:00 CDT
18 :     Tag: blume-20041014-tdp-core
19 :     Description:
20 :    
21 :     Snapshot of a significant overhaul of how the trace/debug/profile support
22 :     is hooked into the system (specifically: Core and SMLofNJ.Internals).
23 :    
24 :     ----------------------------------------------------------------------
25 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
26 : mblume 1650 Date: 2004/10/13 16:34:00 CDT
27 :     Tag: blume-20041013-tdp
28 :     Description:
29 :    
30 :     Some rationalization of names:
31 :    
32 :     structure BTrace -> structure TDPInstrument
33 :     etc.
34 :    
35 :     This is is preparation of using the original back-trace
36 :     instrumentation for other purposes. "TDP" stands for
37 :     Trace/Debug/Profile.
38 :    
39 :     The control flag controlling whether instrumentation is on or off is now
40 :     registered under a different name, so instead of running sml as
41 :    
42 :     sml -Cinstrument.btrace-mode=true
43 :    
44 :     one has to say
45 :    
46 :     sml -Ctdp.instrument=true
47 :    
48 :     ----------------------------------------------------------------------
49 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
50 : mblume 1645 Date: 2004/10/11 16:37:00 CDT
51 :     Tag: blume-20041011-regions
52 :     Description:
53 :    
54 :     Made some minor modifications to elabcore.sml to have source regions
55 :     be propagated more tightly -- resulting in better (i.e., smaller)
56 :     regions being reported in error- and debug messages.
57 :    
58 :     ----------------------------------------------------------------------
59 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
60 : mblume 1644 Date: 2004/10/08 22:50:00 CDT
61 :     Tag: blume-20041008-cmkw
62 :     Description:
63 :    
64 :     Fixed handling of keywords in .cm files: After seeing "is" the lexer
65 :     treats subsequent occurrences of "group", "library", "source", "is",
66 :     "*", and "-" as ordinary identifiers rather than keywords.
67 :    
68 :     Most seriously, this fixes a problem with CM's "shell" tool. The tool
69 :     is supposed to accept a tool argument called "source", but this did
70 :     not work because of the clash with the keyword.
71 :    
72 :     ----------------------------------------------------------------------
73 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
74 : mblume 1642 Date: 2004/10/07 16:00:00 CDT
75 :     Tag: blume-20041007-cleanup
76 :     Description:
77 :    
78 :     Assorted cleanup work:
79 :    
80 :     - got rid of intstrmap in favor of using the library's
81 :     hash table implementation
82 :     - threw out most of the pathnames stuff, as it was not used anyway
83 :     - simplified tokentable implementation
84 :     - fixed some minor spelling errors
85 :    
86 :     ----------------------------------------------------------------------
87 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
88 : mblume 1641 Date: 2004/10/06 15:15:15 CDT
89 :     Tag: blume-20041006-handler
90 :     Description:
91 :    
92 :     Cleaned up the absyn to reflect the invariant that HANDLE always
93 :     carries a FNexp as part of the type definition. This eliminates some
94 :     superfluous sanity checks at runtime down the road.
95 :    
96 :     Some minor cleanup of the btrace code.
97 :    
98 :     ----------------------------------------------------------------------
99 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
100 : mblume 1640 Date: 2004/10/01 10:20:30 CDT
101 :     Tag: blume-20041001-slave
102 :     Description:
103 :    
104 :     Added hack to make slave mode work in the presence of the version
105 :     tool. (Still, since the master does two passes over the code for
106 :     CMB.make, the release number gets bumped twice when slaves are
107 :     attached. I don't know if this is worth fixing...)
108 :    
109 :     ----------------------------------------------------------------------
110 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
111 : mblume 1639 Date: 2004/09/30 10:55:00 CDT
112 :     Tag: blume-20040930-version
113 :     Description:
114 :    
115 :     * Moved the "version" magic into its own little library under
116 :     src/system/smlnj/internal. This avoids expensive reconstruction
117 :     of a stable src/compiler/core.cm.
118 :    
119 :     * At the same time, structure CompilerVersion is now known as structure
120 :     SMLNJVersion.
121 :    
122 :     * Arranged for the version tool to NOT kick in when rebuilding the system
123 :     (makeml -rebuild, fixpt). Otherwise one would never reach a fixpoint.
124 :     Also, loading the versiontool does not work when rebuilding the system
125 :     because CM is not properly initialized at that time.
126 :    
127 :     ----------------------------------------------------------------------
128 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
129 : mblume 1638 Date: 2004/09/29 14:00:00 CDT
130 :     Tag: blume-20040929-autoversion
131 :     Description:
132 :    
133 :     Implemented some CM magic to have
134 :     file src/compiler/TopLevel/main/version.sml
135 :     generated automagically.
136 :     The version is taken from two files: config/version and config/release.
137 :     The first is expected to contain a two-part version number such as 110.49.
138 :     The second should contain a single number, but it may be missing.
139 :    
140 :     If the environment variable VERSIONTOOL_BUMP_RELEASE is defined at the
141 :     time the version tool is loaded (which is the first time you say CMB.make),
142 :     then the tool will increment the value stored in config/release every
143 :     time CMB.make is invoked.
144 :    
145 :     The binfile format is now insensitive to anything beyond the first
146 :     two components of a version number, so bumping the release does not render
147 :     binfiles incompatible. Auto-bumping can be used to keep track of versions
148 :     during development without invalidating existing binfiles.
149 :    
150 :     In any case, every CMB.make updates the date information in version.sml.
151 :     (This is the date that is printed in the banner.)
152 :    
153 :     ----------------------------------------------------------------------
154 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
155 : mblume 1634 Date: 2004/09/28 10:53:00 CDT
156 :     Tag: blume-20040928-controls
157 :     Description:
158 :    
159 :     Some cleanup of the controls code.
160 :    
161 :     ----------------------------------------------------------------------
162 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
163 : mblume 1633 Date: 2004/09/27 22:08:00 CDT
164 :     Tag: blume-20040927-controls
165 :     Description:
166 :    
167 :     Added two pieces of functionality to the Controls interface:
168 :    
169 :     1. val save'restore: 'a control -> unit -> unit
170 :    
171 :     grabs the current value of the control in stage 1 and restores it
172 :     in stage 2.
173 :    
174 :     2. val set' : 'a control * 'a -> unit -> unit
175 :    
176 :     stores the given value into the control in stage 2 (i.e., delayed)
177 :     but does all error checking in stage 1.
178 :     (This is for string controls that need to do parse their argument --
179 :     something that might fail. In some cases, notably in CM, one
180 :     already knows the intended argument but wants to delay the actual
181 :     assignment until a time when error recovery would be more difficult.)
182 :    
183 :     Changed the handling of controls in tool arguments to classes "sml" and
184 :     "lazysml":
185 :     - use Controls.save'restore as a more robust way of restoring the
186 :     old value (in particular: without having to re-parse the string)
187 :     - use controls to handle the "overload" keyword in the init group
188 :     (I believe this change actually fixes a long-standing obscure bug.)
189 :    
190 :     ----------------------------------------------------------------------
191 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
192 : mblume 1632 Date: 2004/09/27 17:00:00 CDT
193 :     Tag: blume-20040927-lazysml
194 :     Description:
195 :    
196 :     Added a new tool class called "lazysml" to CM's tool chest. The only
197 :     difference to "sml" is that compilation is done with Control.lazysml
198 :     set to true. A source of class "lazysml" is automatically recognized
199 :     by a file name suffix of ".lml".
200 :    
201 :     In addition to the above feature, the original class "sml" now also
202 :     supports a tool argument "lazy" which has the same effect. As a
203 :     result, the following three lines are equivalent:
204 :    
205 :     foo.sml : lazysml
206 :     foo.sml : sml (lazy)
207 :     foo.sml (lazy)
208 :    
209 :     The setting goes into effect both during parsing and during
210 :     compilation. The original setting is restored right after parsing and
211 :     after compilation, respectively.
212 :    
213 :     In addition to all the above, there is also a general mechanism to set
214 :     ANY of the "controls" that are available at the command line via
215 :     "-C..." on a per-sml-file basis. The same rules that apply for "lazy"
216 :     apply as well. (In fact, "lazy" is implemented as a special case of
217 :     the general mechanism.)
218 :    
219 :     The .cm file syntax uses a new keyword tool argument called "with".
220 :     There are several ways of indicating the desired settings:
221 :    
222 :     foo.sml (with:parser.quotations=true)
223 :     foo.sml (with:(name:parser.quotations value:true))
224 :     foo.sml (with:(name:name1 value:value1 name:name2 value:value2 ...))
225 :     foo.sml (with:(name1=value1 name2=value2 ...))
226 :     foo.sml (with:(name1=value1 name:name2 value:value2 name3=value3 ...))
227 :    
228 :     etc.
229 :    
230 :     Another possible abbreviation is to leave out the =v or value:v part
231 :     if the name refers to a boolean control (in which case the value is
232 :     taken to be true). Thus, one could get lazy sml also by saying:
233 :    
234 :     foo.sml (with:parser.lazy-keyword=true)
235 :     foo.sml (with:parser.lazy-keyword)
236 :     foo.sml (with:(name:parser.lazy-keyword value:true))
237 :     foo.sml (with:(name:parser.lazy-keyword))
238 :    
239 :     ----------------------------------------------------------------------
240 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
241 : mblume 1631 Date: 2004/09/24 16:22:00 CDT
242 :     Tag: blume-20040924-ppc-long-branch
243 :     Description:
244 :    
245 :     Turned message about "emiting long form of branch" off by default.
246 :     Added a control flag to turn it back on when desired.
247 :    
248 :     ----------------------------------------------------------------------
249 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
250 : mblume 1630 Date: 2004/09/24 16:05:00 CDT
251 :     Tag: blume-20040924-rounding
252 :     Description:
253 :    
254 :     Applied patch for setting rounding modes under Mac OS X. Thanks to
255 :     Melissa O'Neill for providing the code!
256 :    
257 :     ----------------------------------------------------------------------
258 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
259 : mblume 1629 Date: 2004/09/23 17:30:00 CDT
260 :     Tag: blume-20040923-envvars
261 :     Description:
262 :    
263 :     1. Changed definition of type ControlRegistry.registry_tree to
264 :     include control_info (i.e., the name of the controlling environment
265 :     variable).
266 :    
267 :     2. Added command-line flags -e and -E to print the names of environment
268 :     variables that can be used to control internal settings.
269 :     (This uses the new API mentioned in 1.)
270 :    
271 :     ----------------------------------------------------------------------
272 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
273 : mblume 1622 Date: 2004/09/13 16:50:00 CDT
274 :     Tag: Release_110_49
275 :     Description:
276 :    
277 :     New working version (110.49). NEW BOOTFILES!
278 :    
279 :     ----------------------------------------------------------------------
280 : mblume 1621 Name: Matthias Blume
281 :     Date: 2004/09/13 16:20:00 CDT
282 :     Tag: blume-20040913-config-mlrisc
283 :     Description:
284 :    
285 :     Put target "mlrisc" back into the default list.
286 :     (There is no harm in having it, and some users have expressed their
287 :     wish to have "mlrisc" included by default.)
288 :    
289 :     ----------------------------------------------------------------------
290 : jhr 1620 Name: John Reppy
291 :     Date: 2004/09/13
292 :     Tag: jhr-20040913-signals
293 :     Description:
294 :    
295 :     Fixed the signal masking code to properly nest mask/unmask operations
296 :     on a per-signal basis.
297 :    
298 :     ----------------------------------------------------------------------
299 : mblume 1619 Name: Matthias Blume (blume (at) tti - c (dot) org)
300 :     Date: 2004/09/08 13:20:00 CDT
301 :     Tag: blume-20040908-heap-magic
302 :     Description:
303 :    
304 :     Bumped the heap macig number to 0x09082004 to account for the changed
305 :     layout of the ML frame under MacOS X.
306 :    
307 :     ----------------------------------------------------------------------
308 : allenleung 1618 Name: Allen Leung (leunga (at) reservoir (dot) com)
309 :     Date: 2004/09/03 11:26:00 EST
310 :     Tag: leunga-20040903-cygwin-install
311 :     Description:
312 :    
313 :     Added a patch to _arch-n-opsys to enable the Cygwin runtime.
314 :     The Cygwin runtime is turned on by setting the environment
315 :     variable SMLNJ_CYGWIN_RUNTIME to 1.
316 :    
317 :     ----------------------------------------------------------------------
318 : mblume 1615 Name: Matthias Blume (blume (at) tti - c (dot) org)
319 : mblume 1617 Date: 2004/08/31 17:15:00 CDT
320 :     Tag: blume-20040831-core
321 :     Description:
322 :    
323 :     Added some exports to src/compiler/core.cm upon request by J. Joemann.
324 :    
325 :     ----------------------------------------------------------------------
326 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
327 : mblume 1616 Date: 2004/08/30 17:55:00 CDT
328 :     Tag: blume-20040830-installer
329 :     Description:
330 :    
331 :     Upon request by Johannes Joemann:
332 :    
333 :     - improved ML code of installer to fall back to coping when renaming
334 :     fails (i.e., when source and target are on different file systems);
335 :     the code compiles but has yet to be tested in anger
336 :     - removed mlrisc from list of default targets (config/targets)
337 :    
338 :     ----------------------------------------------------------------------
339 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
340 : mblume 1615 Date: 2004/08/27 17:20:00 CDT
341 :     Tag: blume-20040827-ptreql
342 :     Description:
343 :    
344 :     Added ptreql primop to structure InlineT (upon request from Larry
345 :     Paulson).
346 :    
347 :     ----------------------------------------------------------------------
348 : allenleung 1613 Name: Allen Leung (leunga (at) reservoir (dot) com)
349 : allenleung 1614 Date: 2004/08/15 21:21:00 EST
350 :     Tag: leunga-110_48-udgraph
351 :     Description:
352 :    
353 :     Another bug fix from Carl Hauser:
354 :    
355 :     diff /net/niflab/smlnj48/src/MLRISC/graphs/udgraph.sml udgraph.sml
356 :     > 48c48
357 :     > < | rmv((e as (k,_))::es,L) = rmv(es,if k = i then es else
358 :     > e::L)
359 :     > ---
360 :     > > | rmv((e as (k,_))::es,L) = rmv(es,if k = i then L else e::L)
361 :     > Without this, any deletion of an edge in an undirected graph does severe
362 :     > violence to the graph.
363 :    
364 :     ----------------------------------------------------------------------
365 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
366 : allenleung 1613 Date: 2004/08/10 23:35:00 EST
367 :     Tag: leunga-110_48-ppc
368 :     Description:
369 :    
370 :     The IBM/MacOS syntax switch on PPC was incorrectly swapped.
371 :    
372 :     ----------------------------------------------------------------------
373 : mblume 1602 Name: Matthias Blume (blume (at) tti - c (dot) org)
374 : mblume 1615 Date: 2004/08/10 12:00:00 CDT
375 : mblume 1602 Tag: Release_110_48
376 :     Description:
377 :    
378 :     New working version (110.48). NEW BOOTFILES!
379 :    
380 :     ----------------------------------------------------------------------
381 : allenleung 1599 Name: Allen Leung (leunga (at) reservoir (dot) com)
382 :     Date: 2004/08/09 12:21:00 EST
383 :     Tag: leunga-110_47-dijsktra
384 :     Description:
385 :    
386 :     Bug fix from Carl Hauser:
387 :    
388 :     single_source_shortest_paths in dijkstra.sml was observed to get wrong
389 :     answers (by comparing to single_source_shortest_paths in bellman-ford.sml).
390 :    
391 :     The problem is that following the expression A.update(dist,s,Num.zero)
392 :     it is necessary to update the priority queue using Q.decreaseWeight(Q,s).
393 :    
394 :     ----------------------------------------------------------------------
395 : mblume 1595 Name: Matthias Blume (blume (at) tti - c (dot) org)
396 :     Date: 2004/08/06 18:10:00 CDT
397 :     Tag: blume-20040806-cmdline
398 :     Description:
399 :    
400 :     Fiddled with handling of command-line options:
401 :    
402 :     * sml now quits after processing the command line
403 :     if -H, -S, -h<n>, or -s<n> appears as the last
404 :     command-line argument
405 :     * a new option -q terminates the session when encountered on
406 :     the command line; subsequent arguments will be ignored
407 :     * bug fixes: short (erroneous) arguments are no longer ignored
408 :     completely
409 :    
410 :     ----------------------------------------------------------------------
411 : allenleung 1593 Name: Allen Leung (leunga (at) reservoir (dot) com)
412 :     Date: 2004/08/04 18:17:00 EST
413 :     Tag: leunga-110_47-ppc-ibm-asm
414 :     Description:
415 :    
416 :     - Added minimal IBM assembly syntax support for PowerPC.
417 :    
418 :     - Cygwin: manually changed the file cygwin.def. Some exported symbols have
419 :     been altered in the runtime. We need an automatic way to keep the file
420 :     in sync.
421 :    
422 :     ----------------------------------------------------------------------
423 : mblume 1548 Name: Matthias Blume (blume (at) tti - c (dot) org)
424 : mblume 1581 Date: 2004/08/04 14:00:00 CDT
425 :     Tag: Release_110_47
426 :     Description:
427 :    
428 :     New working version (110.47). NEW BOOTFILES!
429 :    
430 :     ----------------------------------------------------------------------
431 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
432 : mblume 1580 Date: 2004/08/03 14:25:00 CDT
433 :     Tag: blume-20040803-callingconv
434 :     Description:
435 :    
436 :     Added low-level support for choosing C calling conventions by
437 :     twiddling the type of rawccall. (See
438 :     src/compiler/Semant/types/cproto.sml for details.)
439 :    
440 :     ----------------------------------------------------------------------
441 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
442 : mblume 1579 Date: 2004/08/02 15:55:00 CDT
443 :     Tag: blume-20040802-backout
444 :     Description:
445 :    
446 :     Backed out of change to win32-filesys.c. The earlier patch to
447 :     get_file_time caused CM to produce files with the wrong time stamp.
448 :    
449 :     ----------------------------------------------------------------------
450 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
451 : mblume 1573 Date: 2004/08/02 14:45:00 CDT
452 :     Tag: blume-20040802-nlffi-win32
453 :     Description:
454 :    
455 :     Added NLFFI support for Win32, adapted from a patch provided by David
456 :     Hansel. This is currently completely untested. Also, the issue
457 :     concerning stdcall vs. ccall is still unresolved.
458 :    
459 :     ----------------------------------------------------------------------
460 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
461 : mblume 1572 Date: 2004/07/30 17:55:00 CDT
462 :     Tag: blume-20040730-various
463 :     Description:
464 :    
465 :     Gearing up towards 110.47...
466 :    
467 :     - various minor bugfixes to ml-nlffigen
468 :     - a beginning of a manual for nlffi
469 :    
470 :     - eliminated 'export name=value' in config/install.sh as this does
471 :     not work with certain versions of /bin/sh
472 :     (Thanks to David King at Motorola for catching this.)
473 :    
474 :     - several bugfixes provided or suggested by David Hansel at Reactive Systems:
475 :     - added a test for tm==NULL to gmtime.c and localtime.c
476 :     - applied patch for incorrect GetFileTime under win32
477 :     - toSeconds -> toMilliseconds in Win32/win32-process.sml
478 :    
479 :     ----------------------------------------------------------------------
480 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
481 : mblume 1557 Date: 2004/07/21 18:20:00 CDT
482 :     Tag: blume-20040721-nlffigen
483 :     Description:
484 :    
485 :     - Fixed minor issue in ml-nlffigen: Now generate structure T_foo
486 :     for a typedef to an incomplete type, but leave out the "typ" member.
487 :     (This is just for consistency.)
488 :     - Started to produce what is supposed to become better (i.e., comprehensive)
489 :     documentation of what ml-nlffigen does and produces.
490 :    
491 :     ----------------------------------------------------------------------
492 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
493 : mblume 1548 Date: 2004/07/14 16:25:00 CDT
494 :     Tag: blume-20040714-union
495 :     Description:
496 :    
497 :     Added C_UNION to c-calls/c-types.sml and updated the machinery
498 :     (ml-nlffigen, cproto.sml) that conveys C function interface
499 :     information to the code generator.
500 :    
501 :     However, the actual architecture-specific implementation of function
502 :     arguments and results that are C unions is still not implemented.
503 :    
504 :     ----------------------------------------------------------------------
505 : allenleung 1539 Name: Allen Leung (leunga (at) reservoir (dot) com)
506 : allenleung 1546 Date: 2004/07/14 14:38:00 EST
507 :     Tag: leunga-110_46_1-ppc-lwzu
508 :     Description:
509 :    
510 :     Added these instructions to the PowerPC architecture:
511 :     LBZU(X), LHZU(X), LWZU(X),
512 :     STWU(X), STFDU, STFSU
513 :    
514 :     etc...
515 :    
516 :     Note: I haven't added their instruction encoding into the description.
517 :    
518 :     ----------------------------------------------------------------------
519 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
520 : allenleung 1539 Date: 2004/07/13 15:04:00 EST
521 :     Tag: leunga-110_46_1-ppc-lwarx
522 :     Description:
523 :    
524 :     Added the two instructions LWARX and STWCX to the PowerPC
525 :     instruction set.
526 :    
527 :     A (untested) rewrite of loop-structure.sml. The old version
528 :     is completely broken.
529 :    
530 :     ----------------------------------------------------------------------
531 : mblume 1479 Name: Matthias Blume (blume (at) tti - c (dot) org)
532 : mblume 1537 Date: 2004/07/13 13:50:00 CDT
533 :     Tag: blume-20040713-nlffi
534 :     Description:
535 :    
536 :     - use paramAlloc to report c-calls with too many arguments
537 :     (for PPC version where parameter area is pre-allocated)
538 :     - added ccall_maxargspace to machspec (to implement the above)
539 :     - made "make" commend in CM's "make" tool configurable
540 :     - added option (default: on) for passing the name of the SML/NJ's "bin"
541 :     directory to "make"; the call looks like this:
542 :    
543 :     make <options> SMLNJ_BINDIR=<dir> <target>
544 :    
545 :     This can be used by the Makefile to, e.g., pick the "right" version
546 :     of ml-nlffigen.
547 :     - minor code tweaks
548 :    
549 :     ----------------------------------------------------------------------
550 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
551 : mblume 1532 Date: 2004/07/12 22:50:00 CDT
552 :     Tag: blume-110_46_1-macosx-nlffi
553 :     Description:
554 :    
555 :     NLFFI under Mac OS X now working (sort of). This is largely untested,
556 :     though.
557 :    
558 :     Note: 1. You have to make a new, clean build of the runtime system.
559 :     2. There are new BOOTFILES, you have to use them!
560 :     (Doing the bootstrap process yourself would be *very* painful!
561 :     If you absolutely have to do it, build the system under
562 :     a different architecture and then cross-compile.)
563 :    
564 :     Version bumped to 110.46.1 to account for runtime data format changes.
565 :    
566 :     ----------------------------------------------------------------------
567 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
568 : mblume 1515 Date: 2004/06/18 14:30:00 CDT
569 :     Tag: blume-20040618-unix
570 :     Description:
571 :    
572 :     Changed the implementation of structure Unix so that the same stream
573 :     is returned every time one of the {text,bin}{In,Out}streamOf functions
574 :     is invoked on the same proc. This is not what the spec currently
575 :     says -- although IMO it arguably should. (See discussion below.)
576 :    
577 :     ----------------------------------------------------------------------
578 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
579 : mblume 1507 Date: 2004/06/17 18:15:00 CDT
580 :     Tag: Release_110_46
581 :     Description:
582 :    
583 :     New working version (110.46). NEW BOOTFILES!
584 :    
585 :     ----------------------------------------------------------------------
586 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
587 : mblume 1506 Date: 2004/06/17 17:20:00 CDT
588 :     Tag: blume-20040617-timer-unix
589 :     Description:
590 :    
591 :     Changed the interface of structures Timer and Unix to match the most
592 :     recent Basis spec.
593 :    
594 :     In the case of Unix there still seems to be an open/weird issue:
595 :    
596 :     The {text,bin}{In,Out}streamOf functions are supposed to create
597 :     fresh streams whenever they are called -- as opposed to have them
598 :     return the same stream every time. This design is supposed to
599 :     prevent space leaks caused by proc values hanging on to streams.
600 :    
601 :     The reap function, on the other hand, is supposed to close the
602 :     streams. This cannot be done without having a handle on the
603 :     stream in proc after all...
604 :    
605 :     I took the liberty to implement the following stopgap solution:
606 :    
607 :     The proc value hangs on to the most recently created stream(s).
608 :     Reap closes those. If either or both of the two streams hadn't
609 :     been created at all yet, then reap will close the corresponding
610 :     file descriptors directly.
611 :    
612 :     PS: I don't understand the original space leak argument anymore. If
613 :     a proc hangs on to the imperative stream, then I/O operations on those
614 :     will advance the state of the cached stream and avoid the space leak.
615 :    
616 :     ----------------------------------------------------------------------
617 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
618 : mblume 1500 Date: 2004/05/28 16:45:00 CDT
619 :     Tag: blume-20040528-basis
620 :     Description:
621 :    
622 :     Added signature PACK_REAL and exported functor PrimIO.
623 :    
624 :     ----------------------------------------------------------------------
625 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
626 : mblume 1498 Date: 2004/05/25 16:00:00 CDT
627 :     Tag: blume-20040525-group-owner
628 :     Description:
629 :    
630 :     CM now ignores (but still accepts) the "owner" information in group
631 :     descriptions. The owner of a group is its next enclosing
632 :     library. Each group must have a unique owner. (There is a virtual
633 : mblume 1505 "toplevel" library that owns groups which are not nested within a real
634 : mblume 1498 library.) Previously, each group had to explicitly declare its owner,
635 :     and CM would check that such a declaration is correct. The new scheme
636 :     is to have CM check that for each group there is precisely one owning
637 :     library.
638 :    
639 :     The advantage of the new scheme is that the programmer no longer needs
640 :     to maintain the somewhat annoying owner information. The downside is
641 :     that CM cannot enforce the ownership rule across multiple runs of
642 :     CM.make. Fortunately, enclosing the same group in two different
643 :     libraries A and B which are not part of the same program does not
644 :     cause real problems.
645 :    
646 :     ----------------------------------------------------------------------
647 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
648 : mblume 1496 Date: 2004/05/20 16:00:00 CDT
649 :     Tag: blume-20040520-win32
650 :     Description:
651 :    
652 :     Made the win32 version work again. (Strangely, a misplaced comma had
653 :     slipped into win32-process.c which prevented the runtime from being
654 :     compiled correctly.)
655 :    
656 :     Also, included a minor addition to ml-build.bat analogous to what was
657 :     done in blume-20040519-ml-build.
658 :    
659 :     ----------------------------------------------------------------------
660 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
661 : mblume 1494 Date: 2004/05/19 22:10:00 CDT
662 :     Tag: blume-20040519-ml-build
663 :     Description:
664 :    
665 :     Arranged for ml-build to clean up after itself a little bit better.
666 :     The script generates a temporary SML source file and compiles it using
667 :     CM, so CM generates metadata (GUID, SKEL, objectfile) for it. It now
668 :     gets rid of those at the end, so they don't accumulate under .cm.
669 :    
670 :     This required a minor change to install.sh because the name of the
671 :     metadata directory (default: .cm) is actually configurable at
672 :     installation time.
673 :    
674 :     ----------------------------------------------------------------------
675 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
676 : mblume 1491 Date: 2004/05/18 15:50:00 CDT
677 :     Tag: blume-20040518-mkreader
678 :     Description:
679 :    
680 :     Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
681 :     implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
682 :    
683 :     ----------------------------------------------------------------------
684 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
685 : mblume 1489 Date: 2004/05/11 14:35:00 CDT
686 :     Tag: blume-20040511-win32sock
687 :     Description:
688 :    
689 :     Added previously missing support for many socket-related functions
690 :     under win32. Thanks to David Hansel <hansel@reactive-systems.com>
691 :     for the voluminous patch!
692 :    
693 :     (I have not tested this patch under win32 yet.)
694 :    
695 : mblume 1490 Here is David's e-mail:
696 :    
697 :     Hi,
698 :    
699 :     Attached to this email you find a diff against sml/nj 110.45
700 :     that will enable socket support under Windows.
701 :    
702 :     To apply the patch (using unix or cygwin)
703 :     1) gunzip runtime.diff.gz
704 :     2) "cd" into "src/runtime" in the source tree of a fresh
705 :     110.45 installation.
706 :     3) patch -p 1 < [your/path/to]runtime.diff
707 :    
708 :     The code compiles fine but has NOT yet been extensively tested.
709 :     I only ran a few tests for basic socket client functionality
710 :     (which worked fine). Especially the functions that use ioctl
711 :     are not tested at all and might not work (see below).
712 :    
713 :     I implemented this since we want to move to a newer version of sml/nj
714 :     but need socket support in order to use it. This is the first time I
715 :     even had a look at the sml/nj source, so please review my changes
716 :     before making this part of the distribution! Here are a few issues
717 :     that I think might be better for someone to solve who is more
718 :     familiar with the sml/nj source (and socket programming):
719 :    
720 :     - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
721 :     exception since I could not figure out what the windows equivalent
722 :     of these functions is
723 :    
724 :     - In sockets-osdep.h there are a some #include statements that are
725 :     only used in a few files that include sockets-osdep.h
726 :    
727 :     - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
728 :     does not process its return value since I don't know how to
729 :     report an error upwards.
730 :    
731 :     - It would probably be good to have a call to WSACleanup() when
732 :     the library is unloaded (if there is such a possibility).
733 :     Otherwise I think Windows will take care of this automatically
734 :     when the process finishes.
735 :    
736 :     - I used ioctlsocket() as a replacement for ioctl() but I have
737 :     no idea if that is actually the proper replacement on Windows.
738 :    
739 :     - All these issues are marked in the code by "FIXME" comments.
740 :    
741 :     We use sml/nj extensively in our products and are quite happy
742 :     with it. I hope this contribution will help you.
743 :    
744 :     Keep up the good work!
745 :    
746 :     David
747 :    
748 : mblume 1489 ----------------------------------------------------------------------
749 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
750 : mblume 1488 Date: 2004/05/11 14:20:00 CDT
751 :     Tag: blume-20040511-installml
752 :     Description:
753 :    
754 :     Fixed two bugs in installml script. (Thanks to Vesa A. Norrman for
755 :     the patch.)
756 :    
757 :     ----------------------------------------------------------------------
758 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
759 : mblume 1487 Date: 2004/05/11 14:05:00 CDT
760 :     Tag: blume-20040511-nlffi-netbsd
761 :     Description:
762 :    
763 :     Added support for nlffi under netbsd. (Thanks to Vesa A. Norrman for
764 :     the patch.)
765 :    
766 :     ----------------------------------------------------------------------
767 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
768 : mblume 1486 Date: 2004/05/11 12:05:00 CDT
769 :     Tag: blume-20040511-exports
770 :     Description:
771 :    
772 :     As per request by Adam Chlipala <adam@hcoop.net>, extended various
773 :     export lists in compiler-related .cm-files.
774 :    
775 :     ----------------------------------------------------------------------
776 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
777 : mblume 1485 Date: 2004/05/11 11:35:00 CDT
778 :     Tag: blume-20040511-allsource
779 :     Description:
780 :    
781 :     The installer now honors the "src-smlnj" target again, although its meaning
782 :     has changed from "all sources required for the compiler" to "all sources
783 :     the installer knows about". In other words, if you enable "src-smlnj"
784 :     in the "targets" file, then the installer will pull in sources for
785 :     everything. (Notice that this refers to source code only. Compiled
786 :     code is still only installed for modules that were requested explicitly
787 :     or which are required for other modules that were requested explicitly.)
788 :    
789 :     ----------------------------------------------------------------------
790 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
791 : mblume 1482 Date: 2004/04/23 17:40:00 CDT
792 :     Tag: blume-20040423-ieee-scan
793 :     Description:
794 :    
795 :     Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
796 :     in the exponent calculation we get INF or ZERO (depending on the mantissa
797 :     and the sign of the exponent).
798 :    
799 :     ----------------------------------------------------------------------
800 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
801 : mblume 1480 Date: 2004/04/23 10:40:00 CDT
802 :     Tag: blume-20040423-ml-build
803 :     Description:
804 :    
805 :     The ml-build script now terminates with a non-0 status when something
806 :     goes wrong.
807 :    
808 :     ----------------------------------------------------------------------
809 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
810 : mblume 1479 Date: 2004/04/22 16:35:00 CDT
811 :     Tag: blume-20040422-Option
812 :     Description:
813 :    
814 :     Made exception Option to be the same as exception Option.Option
815 :     (as it should be).
816 :    
817 :     ----------------------------------------------------------------------
818 : allenleung 1468 Name: Allen Leung (leunga (at) reservoir (dot) com)
819 :     Date: 2004/03/19 14:40:00 EST
820 :     Tag: leunga-20040319-cygwin-nlffi
821 :     Description:
822 :    
823 :     Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
824 :     of SML/NJ. The problem is that
825 :    
826 :     lib = dlopen(NULL, ...)
827 :     f = dlsym(lib, "malloc");
828 :    
829 :     does not work on Windows unless we explicitly export symbols
830 :     such as 'malloc' during linking. We fixed this by explicitly
831 :     exporting the required symbols with the magic gcc incantation:
832 :    
833 :     -Wl,--export-all cygwin.def
834 :    
835 :     where cygwin.def is a file containing all the symbols that
836 :     we wish to export.
837 :    
838 :     I suspect this is a Windows problem and we'll have to
839 :     do the same (somehow with windows compilers) when
840 :     we build the native win32 version with the system
841 :     calls LoadLibrary/GetProcAddress.
842 :    
843 :     ----------------------------------------------------------------------
844 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
845 : mblume 1465 Date: 2004/03/04 16:35:00 CST
846 :     Tag: blume-20040304-intinf-fmt
847 :     Description:
848 :    
849 :     Fixed problem with IntInf.fmt (sign would show up on the right instead
850 :     of on the left for BIN, OCT, and HEX).
851 :    
852 :     ----------------------------------------------------------------------
853 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
854 : mblume 1464 Date: 2004/03/04 11:25:00 CST
855 :     Tag: blume-20040304-symlinks
856 :     Description:
857 :    
858 :     Fixed problem with installer script (unix only) where bin/ml-yacc and
859 :     friends pointed (via symlinks) to absolute locations instead of just
860 :     .run-sml. This was reported by Vesa A Norrman.
861 :    
862 :     ----------------------------------------------------------------------
863 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
864 : mblume 1455 Date: 2004/02/13 14:50:00 CST
865 :     Tag: Release_110_45
866 :     Description:
867 :    
868 :     New working version (110.45). New bootfiles.
869 :    
870 :     ----------------------------------------------------------------------
871 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
872 : mblume 1448 Date: 2004/01/26 15:15:15 CST
873 :     Tag: blume-20040126-toplevel
874 :     Description:
875 :    
876 :     Improved handling of exceptions at the interactive toplevel.
877 :    
878 :     ----------------------------------------------------------------------
879 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
880 :     Date: 2004/01/26 11:25:00
881 : mblume 1446 Tag: blume-20040126-app
882 :     Description:
883 :    
884 :     Type of top-level "app" corrected.
885 : mblume 1447 Added code for setting vp_limitPtrMask to Win32-specific runtime.
886 : mblume 1446
887 :     ----------------------------------------------------------------------
888 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
889 : mblume 1427 Date: 2003/11/18 17:10 CST
890 :     Tag: blume-20031118-basis-fiddle
891 :     Description:
892 :    
893 :     - changed Timer interface to what might become the spec
894 :     - POSIX_FLAGS -> BIT_FLAGS according to spec
895 :     - some other minor discrepancies wrt. spec eliminated
896 :    
897 :     ----------------------------------------------------------------------
898 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
899 : mblume 1414 Date: 2003/11/06 12:00:00 CST
900 :     Tag: Release_110_44
901 :     Description:
902 :    
903 :     New working version (110.44). New bootfiles.
904 :    
905 :     ----------------------------------------------------------------------
906 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
907 : mblume 1411 Date: 2003/11/04 11:50:00 CST
908 :     Tag: blume-20031104-move-libraries
909 :     Description:
910 :    
911 :     Eliminated the "dont_move_libraries" directive in config/targets.
912 :     (The mechanism was broken and could not be fixed easily. Moreover,
913 :     there does not seem to be any reason not to move all libraries into
914 :     lib during installation. I originally implemented this directive as a
915 :     backward-compatibility feature when I first introduced the new CM.
916 :     Now that things have been stable for a long time and going back to the
917 :     old CM is not an option, there is no reason to keep it around.)
918 :    
919 :     ----------------------------------------------------------------------
920 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
921 : mblume 1409 Date: 2003/11/03 16:00:00 CST
922 :     Tag: blume-20031103-installdir
923 :     Description:
924 :    
925 :     Made installer honor INSTALLDIR variable again. (Thanks to Chris
926 :     Richards for pointing out the problem and providing the solution.)
927 :    
928 :     ----------------------------------------------------------------------
929 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
930 : mblume 1400 Date: 2003/10/01 17:05:00 CDT
931 :     Tag: blume-20031001-lal-mlrisc
932 :     Description:
933 :    
934 :     MLRISC bug fix from Lal.
935 :    
936 :     ----------------------------------------------------------------------
937 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
938 : mblume 1399 Date: 2003/09/30 16:10:00 CDT
939 :     Tag: blume-20030930-primio-bat
940 : mblume 1398 Description:
941 :    
942 :     1. Added openVector, nullRd, and nullWr to PRIM_IO.
943 :     2. Improved .bat files (for Win32 port) to make things work under Win95.
944 :     (thanks to Aaron S. Hawley for this one)
945 :    
946 :     ----------------------------------------------------------------------
947 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
948 : mblume 1395 Date: 2003/09/26 16:05:00 CDT
949 :     Tag: blume-20030926-wrappriv
950 :     Description:
951 :    
952 :     Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
953 :    
954 :     ----------------------------------------------------------------------
955 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
956 : mblume 1394 Date: 2003/09/26 15:00:00 CDT
957 :     Tag: blume-20030926-110_43_3
958 :     Description:
959 :    
960 :     - additional cleanup
961 :     - version number bump, NEW BOOTFILES
962 :    
963 :     ----------------------------------------------------------------------
964 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
965 : mblume 1393 Date: 2003/09/26 12:00:00 CDT
966 :     Tag: blume-20030926-ppautoload
967 :     Description:
968 :    
969 :     I modified the read-eval-print loop so that the autoloader gets
970 :     invoked whenever the prettyprinter tries to look up a symbol that
971 :     is not currently defined in the toplevel environment but which
972 :     appears in CM's autoload registry. As a result, we see far fewer of
973 :     those ?.Foo.Bar.xxx names in the prettyprinter's output.
974 :    
975 :     In addition to this I tried to clean up some pieces of the Basis
976 :     implementation (e.g., Socket, Word8Array) in order to prevent other
977 :     instances of these ?.Foo.Bar.xxx names from being printed.
978 :    
979 :     The mechanism that picks names for types still needs some work, though.
980 :     (Right now it seems that if there is a type A.t which is defined to
981 : mblume 1394 be B.u, but B is unavailable at toplevel, then A.t gets printed as
982 :     "?.B.u" although the perhaps more sensible solution would be to use
983 : mblume 1393 "A.t" in this case. In other words, the prettyprinter should follow
984 :     a chain of DEFtycs not farther than there are corresponding toplevel
985 :     names in the current environment.)
986 :    
987 :     ----------------------------------------------------------------------
988 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
989 : mblume 1391 Date: 2003/09/24 16:31:00 CDT
990 :     Tag: blume-20030924-installer
991 :     Description:
992 :    
993 :     Another installer tweak: All the ML code for the installer is now
994 :     compiled during CMB.make and put into a little library called
995 :     $smlnj/installer.cm. The installation then simply invokes
996 :    
997 :     sml -m $smlnj/installer.cm
998 :    
999 :     and everything happens automagically.
1000 :    
1001 :     Win32: ML code senses value of environment variable SMLNJ_HOME.
1002 :     Unix: ML code senses values of environment variables ROOT, CONFIGDIR,
1003 :     and BINDIR.
1004 :    
1005 :     The new scheme guarantees that the ML code responsible for the installation
1006 :     is in sync with the APIs of the main system. Also, the installer is
1007 :     somewhat faster because the installer script is precompiled.
1008 :    
1009 :     ----------------------------------------------------------------------
1010 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1011 : mblume 1390 Date: 2003/09/24 15:35:00 CDT
1012 :     Tag: blume-20030924-synsock
1013 :     Description:
1014 :    
1015 :     Added a signature SYNCHRONOUS_SOCKET to basis.cm. This is like SOCKET
1016 :     but excludes all non-blocking operations. Defined SOCKET (in Basis)
1017 :     and CML_SOCKET in terms of SYNCHRONOUS_SOCKET. Removed superfluous
1018 :     implementations of non-blocking operations from CML's Socket
1019 :     structure.
1020 :    
1021 :     ----------------------------------------------------------------------
1022 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1023 : mblume 1389 Date: 2003/09/24 15:10:05 CDT
1024 :     Tag: blume-20030924-sockets
1025 :     Description:
1026 :    
1027 :     1. Fixed SOCKET API and implementation to match Basis spec.
1028 :     This required changing the internal representation of sockets to one
1029 :     that remembers (for each socket file descriptor) whether it is currently
1030 :     blocking or non-blocking. This state is maintained lazily (i.e., a system
1031 :     call is made only if the state actually needs to change).
1032 :    
1033 :     2. OS-specific details of sockets were moved into separate files, thus
1034 :     making it possible to unify the bulk of the socket implementations
1035 :     between Unix and Win32.
1036 :    
1037 :     3. CML's socket API changed accordingly.
1038 :     (Note that we need to remove non-blocking functions from this API
1039 :     since they are redundant in the case of CML!)
1040 :    
1041 :     4. CML's socket implementation now makes use of non-blocking functions
1042 :     provided by Basis, thus removing all OS-dependent code from this part
1043 :     of CML.
1044 :    
1045 :     5. Changed Real64.precision from 52 to 53. Minor cleanup in Real64 code.
1046 :    
1047 :     ----------------------------------------------------------------------
1048 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1049 : mblume 1387 Date: 2003/09/22 12:10:00 CDT
1050 : mblume 1388 Tag: blume-20030922-110_43_2
1051 : mblume 1387 Description:
1052 :    
1053 :     Made a new interim version and bootfiles for developer's bootstrapping
1054 :     convenience.
1055 :    
1056 :     110.43.2 -- NEW BOOTFILES
1057 :    
1058 :     ----------------------------------------------------------------------
1059 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1060 : mblume 1385 Date: 2003/09/19 15:55:00 CDT
1061 :     Tag: blume-20030919-cmdir
1062 :     Description:
1063 :    
1064 :     1. new-install.sh -> install.sh
1065 :     2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
1066 :     3. tweaked installer so that another name instead of .cm can be chosen
1067 :     at install time (by setting the CM_DIR_ARC environment variable
1068 :     during installation); once installation is complete, the name is
1069 :     fixed
1070 :    
1071 :     ----------------------------------------------------------------------
1072 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1073 : mblume 1384 Date: 2003/09/18 16:00:00 CDT
1074 :     Tag: blume-20030918-110_43_1
1075 :     Description:
1076 :    
1077 :     Made a new interim version and bootfiles for developer's bootstrapping
1078 :     convenience.
1079 :    
1080 :     110.43.1 -- NEW BOOTFILES
1081 :    
1082 :     ----------------------------------------------------------------------
1083 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1084 : mblume 1383 Date: 2003/09/18 15:20:00 CDT
1085 :     Tag: blume-20030918-misc
1086 :     Description:
1087 :    
1088 :     1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
1089 :     this seems to be controversial at the moment) and used those in
1090 :     Posix.ProcEnv.times.
1091 :    
1092 :     2. Added Time.{from,to}Nanoseconds to Time.
1093 :    
1094 :     3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
1095 :     For example, fromLargeInt never needs to look at more than 3 "big
1096 :     digits" to get its 53 bits of precision.
1097 :    
1098 :     ----------------------------------------------------------------------
1099 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
1100 : mblume 1381 Date: 2003/09/17 16:30:00 CDT
1101 :     Tag: blume-20030917-real32-slices
1102 :     Description:
1103 :    
1104 :     Added an entry to the primitive environment
1105 :     (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
1106 :     added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
1107 :    
1108 :     Removed some of the "magic" constants in real64.sml and replaced them
1109 :     with code that generates these values from their corresponding
1110 :     integer counterparts.
1111 :    
1112 :     Made all(?) the slice-related changes to the Basis and made everything
1113 :     compile again...
1114 :    
1115 :     ----------------------------------------------------------------------
1116 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1117 : mblume 1375 Date: 2003/09/15 17:45:00 CDT
1118 :     Tag: blume-20030915-rbase
1119 :     Description:
1120 :    
1121 :     Fixed bug in Real.fromLargeInt.
1122 :    
1123 :     ----------------------------------------------------------------------
1124 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1125 : mblume 1369 Date: 2003/09/13 18:11:00 CDT
1126 :     Tag: blume-20030913-libinstall
1127 :     Description:
1128 :    
1129 :     Minor bugfix in config/libinstall (set anchor with path to
1130 :     standalone tool after installing it, otherwise libraries that
1131 :     need ml-lex or ml-yacc won't compile the first time the installer
1132 :     runs).
1133 :    
1134 :     ----------------------------------------------------------------------
1135 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1136 : mblume 1368 Date: 2003/09/12 11:45:00 CDT
1137 :     Tag: blume-20030912-various
1138 :     Description:
1139 :    
1140 :     - fixed bug in Real.toLargeInt
1141 :     - fixed bug in Posix.ProcEnv.times
1142 :     - changed inputLine functions to return an option
1143 :     - minor installer improvements / bugfixes
1144 :     - changed default @SMLalloc parameter for x86/celeron to 64k
1145 :    
1146 :     ----------------------------------------------------------------------
1147 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1148 : mblume 1356 Date: 2003/09/09 22:00:00 CDT
1149 :     Tag: Release_110_43
1150 :     Description:
1151 :    
1152 :     New working release 110.43. New bootfiles.
1153 :    
1154 :     ----------------------------------------------------------------------
1155 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1156 : mblume 1354 Date: 2003/09/09 19:20:00 CDT
1157 :     Tag: blume-20030909-installer
1158 :     Description:
1159 :    
1160 :     Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
1161 :     Modified config/install.bat to take advantage of it. Also modified
1162 :     config/install.sh (and called it config/new-install.sh) to take advantage
1163 :     of it on Unix systems. (The SML code is (supposed to be) platform-
1164 :     independent.)
1165 :    
1166 :     The installer can now install everything under Win32
1167 :     as well as under *nix as long as it compiles.
1168 :    
1169 :     Other changes:
1170 :    
1171 :     - made CML compile again under Win32
1172 :     - made eXene compile under Win32 (by providing a fake structure UnixSock
1173 :     and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
1174 :     - fixed a bug in nowhere: it assumed that type OS.Process.status is the
1175 :     same as type int; under Win32 it isn't
1176 :     - fixed some slice-related problems in the win32-specific parts of CML
1177 :     - added a functor argument "sameVol" to os-path-fn.sml in the Basis
1178 :     (under Win32, the volume name is case-insensitive, and the
1179 :     OS.Path code compares volume names for equality)
1180 :    
1181 :     ----------------------------------------------------------------------
1182 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1183 : mblume 1353 Date: 2003/09/08 11:55:00 CDT
1184 :     Tag: blume-20030908-fullpath
1185 :     Description:
1186 :    
1187 :     Made Win32 version of OS.FileSys.fullPath return current directory
1188 :     when given an empty string. This is what the spec says, and incidentally,
1189 :     CM depends on it. (CM otherwise goes into an infinite loop in certain
1190 :     cases when presented with the name of a non-existing .cm file.)
1191 :    
1192 :     ----------------------------------------------------------------------
1193 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1194 : mblume 1350 Date: 2003/09/04 16:30:00 CDT
1195 : mblume 1352 Tag: blume-20030905-slices-etc
1196 : mblume 1350 Description:
1197 :    
1198 :     1. Changed interface to vectors and arrays in Basis to match
1199 :     (draft) Basis spec.
1200 :     2. Added signatures and implementations of slices according to
1201 :     Basis spec.
1202 :     3. Edited source code throughout the system to make it compile again
1203 :     under 1. and 2. (In some cases code had to be added to have it
1204 :     match the new signatures.)
1205 :     4. MLRISC should be backward-compatible: the copies of the originals
1206 :     of files that needed to change under 3. were retained, the .cm files
1207 :     check the compiler version number and use old versions when
1208 :     appropriate.
1209 :     5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
1210 :     dirstream -> string option (in accordance with Basis spec).
1211 :     6. When generating code that counts lines, ml-lex used function
1212 :     CharVector.foldli, taking advantage of its old interface.
1213 :     This has been replaced with the corresponding code from
1214 :     CharVectorSlice. (html-lex must be re-lexed!)
1215 :     7. BitArray in smlnj-lib/Util has been extended/modified to match the
1216 :     new MONO_ARRAY signature. (Do we need BitArraySlice?)
1217 :     8. Removed temporary additions (fromInternal, toInternal) from the
1218 :     (now obsolete) IntInf in smlnj-lib/Util.
1219 :     9. Cleaned up structure Byte.
1220 :     10. Added localOffset, scan, and fromString to Date (according to spec).
1221 :     Cleaned/corrected implementation of Date.
1222 :     (Still need to check for correctness; implement better canonicalizeDate.)
1223 :     11. Added "scan" to signature IEEE_REAL.
1224 :     12. Some improvements to IntInf [in particular: efficiency-hack for
1225 :     mod and rem when second operand is 2 (for parity checks).]
1226 :     13. Changed representation of type Time.time, using a single IntInf.int
1227 :     value counting microseconds. This considerably simplified the
1228 :     implementation of structure Time. We now support negative time
1229 :     values; scan and fromString handle signs.
1230 :     14. Functor PrimIO now takes two additional arguments (VectorSlice and
1231 :     ArraySlice).
1232 :    
1233 :     ----------------------------------------------------------------------
1234 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1235 : mblume 1347 Date: 2003/08/28 17:00:00 CDT
1236 :     Tag: blume-20030828-intinf
1237 :     Description:
1238 :    
1239 :     This is a major update which comes with a version number bump
1240 :     (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
1241 :     and an implementation of IntInf in the Basis.
1242 :    
1243 :     There are a fairly large number of related changes and updates throughout
1244 :     the system:
1245 :    
1246 :     Basis:
1247 :     - Implemented IntInf.
1248 :     - Made LargeInt a projection of IntInf (by filtering through INTEGER).
1249 : mblume 1348 - Added some missing Real64 operations, most notably Real.toLargeInt.
1250 : mblume 1347 - Added FixedInt as a synonym for Int32.
1251 :    
1252 :     compiler:
1253 :     * Added support for a built-in intinf type.
1254 :     - literals
1255 :     - pattern matching
1256 :     - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
1257 :     - overloading on literals and operations
1258 :    
1259 :     This required adding a primitive type intinf, some additional
1260 :     primops, and implementations for several non-trivial intinf
1261 :     operations in Core. (The intinf type is completely abstract
1262 :     to the compiler; all operations get delegated back to the Core.)
1263 :    
1264 :     * Intinf equality is handled by polyequal. However, the compiler
1265 :     does not print its usual warning in this case (since polyequal
1266 :     is the right thing to do there).
1267 :    
1268 :     * Improved the organization of structure InlineT.
1269 :    
1270 :     * A word about conversion primops:
1271 :     If conversions involving intinf do not cancel out during
1272 : mblume 1348 CPS contract, then the compiler must insert calls to Core functions.
1273 : mblume 1347 Since all core access must be resolved already during the FLINT
1274 :     translate phase, it would be too late a the time of CPS contract
1275 : mblume 1348 to add new Core calls. For this reason, conversion primops
1276 : mblume 1347 for intinf carry two arguments: 1. the numeric argument that
1277 :     they are supposed to convert, and 2. the Core function that
1278 :     can help with this conversion if necessary. If CPS contract
1279 : mblume 1348 eliminates a primop, then the associated Core function becomes
1280 :     dead and goes away. Intinf conversion primops that do not get
1281 :     eliminated by CPS contract get rewritten into calls of their
1282 :     core functions by a separate, new phase.
1283 : mblume 1347
1284 :     interactive system:
1285 :     - Control.Print.intinfDepth controls max length of intinf constants
1286 :     being printed. (Analogous to Control.Print.stringDepth.)
1287 :     - Cleanup in printutil and pputil: got rid of unused stuff and
1288 :     duplicates; replaced some of the code with code that makes better
1289 :     use of library functionality.
1290 :    
1291 :     CM:
1292 :     Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
1293 :     are no longer silent.
1294 :    
1295 :     CKIT:
1296 :     Fixed mismatched uses of Int32 and LargeInt. I always decided
1297 :     in favor of LargeInt -- which is now the same as IntInf.
1298 :     CKIT-knowledgable people should check whether this is what's
1299 :     intended and otherwise change things back to using Int32 or
1300 :     FixedInt.
1301 :    
1302 :     Throughout the code:
1303 : mblume 1348 Started using IntInf.int literals and built-in operations
1304 : mblume 1347 (e.g., comparison with 0) where this seems appropriate.
1305 :    
1306 :    
1307 :     ----------------------------------------------------------------------
1308 : macqueen 1343 Name: Dave MacQueen (dbm@cs.uchicago.edu)
1309 :     Date: 2003/08/13 11:36:00 CDT
1310 :     Tag: dbm-20030813-mcz-merge1
1311 :     Description:
1312 :    
1313 :     Merging changes from the mcz-branch development branch into trunk.
1314 :     These changes involve replacement of the emulated old prettyprinter
1315 :     interface with direct use of the SML/NJ Lib PP library, and fixing
1316 :     of a couple of bugs (895, 1186) relating to error messages. A new
1317 :     prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
1318 :     has been added.
1319 :    
1320 :     ----------------------------------------------------------------------
1321 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1322 : mblume 1342 Date: 2003/08/11 15:45:00 CDT
1323 :     Tag: blume-20030811-windows
1324 :     Description:
1325 :    
1326 :     Version number bumped to 110.42.9. NEW BOOTFILES!!!
1327 :    
1328 :     http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
1329 :    
1330 :     This patch restores SML/NJ's ability to run under win32. There are a
1331 :     number of changes, including fixes for several bugs that had gone
1332 :     unnoticed until now:
1333 :    
1334 :     - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
1335 :     trying to run the win32 version from within cygwin.)
1336 :    
1337 :     - There are a number of simple .bat scripts that substitute for their
1338 :     corresponding Unix shell-scripts. (See below.)
1339 :    
1340 :     - The internals of ml-build have been modified slightly. The main
1341 :     difference is that instead of calling ".link-sml" (or link-sml.bat)
1342 :     using OS.Process.system, the ML process delegates this task back
1343 :     to the script. Otherwise problems arise in mixed environments such
1344 :     as Cygwin where scripts look and work like Unix scripts, but
1345 :     where OS.Process.system cannot run them.
1346 :    
1347 :     - In CM, the srcpath pickler used native pathname syntax -- which
1348 :     is incorrect in the case of cross-compilation. The new pickle format
1349 :     is independent of platform-specific naming conventions.
1350 :    
1351 :     - Path configuration files (such as lib/pathconfig) can now choose
1352 :     between native and standard syntax. Placing a line of the form
1353 :    
1354 :     standard!
1355 :    
1356 :     into the file causes all subsequent paths to be interpreted using
1357 :     CM standard pathname syntax (= Unix conventions); a line
1358 :    
1359 :     native!
1360 :    
1361 :     switches back to native style. This was needed so that
1362 :     path config files can be written portably, see src/system/pathconfig.
1363 :    
1364 :     - Runtime system:
1365 :    
1366 :     - win32-filesys.c: get_file_time and set_file_time now
1367 :     access modification time, not creation time.
1368 :    
1369 :     - I/O code made aware of new array representation.
1370 :    
1371 :     - Bug fixes in X86.prim.masm.
1372 :    
1373 :     - src/system/makeml made aware of win32. (For use under cygwin
1374 :     and other Unix-environments for windows.)
1375 :    
1376 :     - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
1377 :     which caused BinIO.inputAll to fail consistently.
1378 :    
1379 :     .bat scripts:
1380 :    
1381 :     Windows .bat scripts assume that SMLNJ_HOME is defined.
1382 :    
1383 :     - sml.bat, ml-yacc.bat, ml-lex.bat: Driver scripts for standalone
1384 :     applications (sml, ml-yacc, ml-lex).
1385 :     - ml-build.bat: analogous to ml-build.
1386 :     - config\install.bat: Analogous to config/install.sh. This requires
1387 :     that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
1388 :     (nmake etc. must be on the path, and vcvars32 must have been run.)
1389 :     Moreover, sources for ml-lex and ml-yacc need to exist under src,
1390 :     and the bootfile hierarchy must have been unpacked under
1391 :     sml.boot.x86-win32.
1392 :     The script is very primitive and does a poor job at error checking.
1393 :     It only installs the base system, ml-lex, and ml-yacc. No other
1394 :     libraries are being installed (i.e., you get only those that
1395 :     are part of the compiler.)
1396 :     - link-sml.bat: analogous to .link-sml, but not currently used
1397 :    
1398 :     Unrelated bug fixes:
1399 :    
1400 :     - ml-nlffigen now exports structures ST_* corresponding to incomplete
1401 :     types.
1402 :     - Added getDevice to PP/src/pp-debug-fn.sml. (Would not compile
1403 :     otherwise.)
1404 :    
1405 :     ----------------------------------------------------------------------
1406 : macqueen 1337 Name: Dave MacQueen (macqueen@cs.uchicago.edu)
1407 :     Date: 2003/06/17
1408 :     Tag: macqueen-20030617-bug895
1409 :     Description:
1410 :    
1411 :     Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
1412 :     Tag will be used for new development branch (mcz-branch) for
1413 :     use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
1414 :    
1415 :     ----------------------------------------------------------------------
1416 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1417 : mblume 1335 Date: 2003/05/27 16:55:00 CDT
1418 :     Tag: blume-20030527-polyeq
1419 :     Description:
1420 :    
1421 :     Tried to eliminated most cases of polymorphic equality.
1422 :    
1423 :     ----------------------------------------------------------------------
1424 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1425 : mblume 1334 Date: 2003/05/21 17:45:00 CDT
1426 :     Tag: blume-20030517-complete
1427 :     Description:
1428 :    
1429 :     Two changes:
1430 :    
1431 :     1. Added a flag for controlling whether non-exhaustive bindings will
1432 :     be treated as errors (default is false).
1433 :     2. Cleaned up the *entire* source tree so that CMB.make goes through
1434 :     without a single non-exhaustive match- or bind warning.
1435 :    
1436 :     ----------------------------------------------------------------------
1437 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1438 : mblume 1332 Date: 2003/05/17 10:20:00 CDT
1439 :     Tag: blume-20030517-absyn
1440 :     Description:
1441 :    
1442 :     1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
1443 :    
1444 :     This mainly affects the quality of error messages. However, some
1445 :     of the code is now more straightforward than before. (Treatment of
1446 :     the above four constructs in translate.sml is much simpler than
1447 :     the "macro-expansion" that was going on before. Plus, the mach-
1448 :     compiler no longer gets invoked just to be able to compile an
1449 :     if-expression.)
1450 :    
1451 :     2. The ErrorMsg.Error exception is now caught and absorbed by the
1452 :     interactive loop.
1453 :    
1454 :     ----------------------------------------------------------------------
1455 : allenleung 1327 Name: Allen Leung
1456 :     Date: 2003/05/16 13:05:00 CDT
1457 :     Tag: leunga-20030516-cygwin-runtime
1458 :     Description:
1459 :    
1460 :     Ported the runtime system to cygwin, which uses the unix
1461 :     x86-unix bin files. Missing/buggy features:
1462 :    
1463 :     o getnetbyname, getnetbyaddr: these functions seem to be missing in
1464 :     the Cygwin library.
1465 :     o Ctrl-C handling may be flaky.
1466 :     o Windows system calls and Windows I/O are not supported.
1467 :    
1468 :     A new set of binfiles is located at:
1469 :    
1470 :     http://www.dorsai.org/~leunga/boot.x86-unix.tgz
1471 :    
1472 :     This is only needed for bootstrapping the cygwin version of smlnj.
1473 :     Other x86 versions can use the existing binfiles.
1474 :    
1475 :     ----------------------------------------------------------------------
1476 : mblume 1317 Name: Matthias Blume
1477 :     Date: 2003/04/08 15:42:00 CDT
1478 :     Tag: blume-20030408-listpair
1479 :     Description:
1480 :    
1481 :     1. Added a target 'mlrisc' to installer.
1482 :    
1483 :     2. Added missing elements to structure ListPair.
1484 :    
1485 :     ----------------------------------------------------------------------
1486 : leunga 1296 Name: Allen Leung
1487 :     Date: 2003/01/07 10:40:00 EST
1488 :     Tag: leunga-20030107-int-rem
1489 :     Description:
1490 :    
1491 :     Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
1492 :     The arguments to the SUBL instruction were swapped.
1493 :    
1494 :     ----------------------------------------------------------------------
1495 : blume 1229 Name: Matthias Blume
1496 : blume 1294 Date: 2002/12/12 16:25:00 EST
1497 :     Tag: blume-20021212-risc-ra
1498 :     Description:
1499 :    
1500 :     Fixed a serious bug in the rewrite code for FP spilling/reloading that
1501 :     sent the RA into an infinite loop when floating point registers get
1502 :     spilled. (Because of this bug, e.g., nucleic stopped compiling between
1503 :     110.37 and 110.38.)
1504 :     There was another set of potential problems related to the handling of
1505 :     MLRISC annotations (but those did not yet cause real problems, apparently).
1506 :    
1507 :     ----------------------------------------------------------------------
1508 :     Name: Matthias Blume
1509 : blume 1291 Date: 2002/12/06 22:40:00 EST
1510 :     Tag: blume-20021206-cm-fileid
1511 :     Description:
1512 :    
1513 :     Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
1514 :     This fixes the problem of CM getting confused by files that suddenly
1515 :     change their identity (e.g., by getting unlinked and recreated by some
1516 :     text editor such as vi). There might be a better/cheaper/cleaner way
1517 :     of doing this, but for now this will have to do.
1518 :    
1519 :     ----------------------------------------------------------------------
1520 :     Name: Matthias Blume
1521 : blume 1288 Date: 2002/10/28 09:50:00 EST
1522 :     Tag: blume-20021028-typecheck
1523 :     Description:
1524 :    
1525 :     Exported structure Typecheck from $smlnj/viscomp/core.cm.
1526 :    
1527 :     ----------------------------------------------------------------------
1528 :     Name: Matthias Blume
1529 : blume 1282 Date: 2002/10/17 09:10:00 EDT
1530 : blume 1279 Tag: Release_110_42
1531 :     Description:
1532 :    
1533 : blume 1282 In good old tradition, there has been a slight hiccup so that we have
1534 :     to patch 110.42 after the fact. The old release tag has been replaced
1535 :     (see below).
1536 :    
1537 :     The change solves a problem with two competing approaches the
1538 :     configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
1539 :     each other's way.
1540 :    
1541 :     This change only affects the runtime system code and the installer script.
1542 :     (No new bootfiles.)
1543 :    
1544 :     ----------------------------------------------------------------------
1545 :     Name: Matthias Blume
1546 :     Date: 2002/10/16 12:00:00 EDT
1547 :     Tag: Release_110_42_removed
1548 :     Description:
1549 :    
1550 : blume 1279 New working release. New bootfiles.
1551 :    
1552 :     ----------------------------------------------------------------------
1553 :     Name: Matthias Blume
1554 : blume 1273 Date: 2002/10/10 13:10:00 EDT
1555 :     Tag: blume-20021010-ppc-divs
1556 :     Description:
1557 :    
1558 :     The mltree operator DIVS must be implemented with an overflow check on
1559 :     the PPC because the hardware indicates divide-by-zero using "overflow" as
1560 :     well.
1561 :    
1562 :     ----------------------------------------------------------------------
1563 :     Name: Matthias Blume
1564 : blume 1261 Date: 2002/07/23 11:45:00
1565 :     Tag: blume-20020723-smlnj-home
1566 :     Description:
1567 :    
1568 :     Sml now senses the SMLNJ_HOME environment variable. If this is set,
1569 :     then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1570 :     CM_PATHCONFIG is also set), the path configuration file is assumed
1571 :     to be in $SMLNJ_HOME/lib/pathconfig. This way one can easily move
1572 :     the entire tree to some other place and everything will "just work".
1573 :    
1574 :     (Companion commands such as ml-build and ml-makedepend also sense this
1575 :     variable.)
1576 :    
1577 :     ----------------------------------------------------------------------
1578 :     Name: Matthias Blume
1579 : blume 1259 Date: 2002/07/12 21:19:00 EDT
1580 :     Tag: blume-20020712-liveness
1581 :     Description:
1582 :    
1583 :     Exported two useful "step" functions from liveness module (MLRISC).
1584 :    
1585 :     ----------------------------------------------------------------------
1586 :     Name: Matthias Blume
1587 : blume 1253 Date: 2002/07/05 16:00 EDT
1588 :     Tag: Release_110_41
1589 :     Description:
1590 :    
1591 :     New working release. New bootfiles.
1592 :    
1593 :     ----------------------------------------------------------------------
1594 :     Name: Matthias Blume
1595 : blume 1250 Date: 2002/07/05 10:25:00 EDT
1596 :     Tag: blume-20020705-btimp
1597 :     Description:
1598 :    
1599 :     Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1600 :     other clients can set up backtracing support.
1601 :    
1602 :     ----------------------------------------------------------------------
1603 :     Name: Matthias Blume
1604 : blume 1249 Date: 2002/06/25 17:23:00 EDT
1605 :     Tag: blume-20020625-fpmax
1606 :     Description:
1607 :    
1608 :     Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1609 :     case. (The sense of the isNaN test was reversed -- which made min and
1610 :     max always return their first argument.)
1611 :    
1612 :     ----------------------------------------------------------------------
1613 :     Name: Matthias Blume
1614 : blume 1240 Date: 2002/06/11
1615 :     Tag: blume-20020611-unixpath
1616 :     Description:
1617 :    
1618 :     Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1619 :    
1620 :     ----------------------------------------------------------------------
1621 :     Name: Matthias Blume
1622 : blume 1238 Date: 2002/06/10 16:35:00 EDT
1623 :     Tag: blume-20020610-ieeereal
1624 :     Description:
1625 :    
1626 :     I back-ported my implementation of IEEEReal.fromString from the
1627 :     idlbasis-devel branch so that we can test it.
1628 :    
1629 :     Another small change is that ppDec tries to give more information
1630 :     than just "<sig>" in the case of functors. However, this code is
1631 :     broken in some mysterious way if the functor's body's signature
1632 :     has not been declared by ascription but gets inferred from the
1633 :     implementation. This needs fixing...
1634 :    
1635 :     ----------------------------------------------------------------------
1636 :     Name: Matthias Blume
1637 : blume 1229 Date: 2002/05/31
1638 :     Tag: blume-20020531-btrace-mode
1639 :     Description:
1640 :    
1641 :     Resurrected SMLofNJ.Internals.BTrace.mode. (It accidentally fell by
1642 :     the wayside when I switched over to using Controls everywhere.)
1643 :    
1644 :     ----------------------------------------------------------------------
1645 : george 1222 Name: Lal George
1646 :     Date: 2002/05/23 12:21:40 EDT
1647 :     Tag: george-20020523-visual-labels
1648 :     Description:
1649 :    
1650 :     Labels are now displayed in the graphical output to make
1651 :     the fall-through and target blocks obvious.
1652 :    
1653 :     ----------------------------------------------------------------------
1654 : blume 1204 Name: Matthias Blume
1655 : blume 1220 Date: 2002/05/22 11:03:00 EDT
1656 :     Tag: blume-20020522-shrink
1657 :     Description:
1658 :    
1659 :     John tweaked yesterday's fix for 1131 to handle an out-of-memory
1660 :     situation that comes up when allocating huge arrays.
1661 :    
1662 :     ----------------------------------------------------------------------
1663 :     Name: Matthias Blume
1664 : blume 1215 Date: 2002/05/21 16:00:00 EDT
1665 :     Tag: Release_110_40
1666 :     Description:
1667 :    
1668 :     New working release (110.40). New bootfiles.
1669 :    
1670 :     [Also: John Reppy fixed GC bug 1131.]
1671 :    
1672 :     ----------------------------------------------------------------------
1673 :     Name: Matthias Blume
1674 : blume 1212 Date: 2002/05/21 12:35:00 EDT
1675 :     Tag: blume-20020521-cmdoc
1676 :     Description:
1677 :    
1678 :     CM documentation update.
1679 :    
1680 :     ----------------------------------------------------------------------
1681 :     Name: Matthias Blume
1682 : blume 1211 Date: 2002/05/21 10:55:00 EDT
1683 :     Tag: blume-20020521-misc
1684 :     Description:
1685 :    
1686 :     - John tweaked runtime to be silent on heap export (except when
1687 :     GC messages are on).
1688 :     - I added a few more things (cross-compiling versions of CMB) to
1689 :     config/preloads (as suggestions).
1690 :    
1691 :     ----------------------------------------------------------------------
1692 :     Name: Matthias Blume
1693 : blume 1208 Date: 2002/05/20 22:25:00 EDT
1694 :     Tag: blume-20020520-controls
1695 :     Description:
1696 :    
1697 :     - Added ControlUtil structure to control-lib.cm.
1698 :     - Use it throughout.
1699 :     - Used Controls facility to define MLRISC controls (as opposed to
1700 :     registering MLRISC control ref cells with Controls after the fact)
1701 :     - Fixed messed-up controls priorities.
1702 :    
1703 :     * Removed again all the stuff from config/preloads that one wouldn't
1704 :     be able to preload at the time the initial heap image is built.
1705 :     (Many libraries, e.g., CML, do not exist yet at this time. The
1706 :     only libraries that can be preloaded via config/preloads are those
1707 :     that come bundled with the bootfiles.)
1708 :    
1709 :     ----------------------------------------------------------------------
1710 :     Name: Matthias Blume
1711 : blume 1204 Date: 2002/05/20 10:59:00 EDT
1712 :     Tag: blume-20020520-preloads
1713 :     Description:
1714 :    
1715 :     Added a lot of commented-out suggestions for things to be included
1716 :     in config/preloads.
1717 :    
1718 :     ----------------------------------------------------------------------
1719 : leunga 1203 Name: Allen Leung
1720 :     Date: 2002/05/18 14:20:00 EDT
1721 :     Tag: leunga-20020518-mdl
1722 :     Description:
1723 :    
1724 :     o Made the mdl tool stuff compile and run again.
1725 :     o I've disabled all the stuff that depends on RTL specifications; they
1726 :     are all badly broken anyway.
1727 :    
1728 :     ----------------------------------------------------------------------
1729 : blume 1201 Name: Matthias Blume
1730 :     Date: 2002/05/17 16:49:00 EDT
1731 :     Tag: blume-20020517-controls
1732 :     Description:
1733 :    
1734 :     0. John Reppy made several modifications to the SML/NJ library.
1735 :     In particular, there is a shiny new controls-lib.cm.
1736 :    
1737 :     1. Pushed new controls interface through compiler so that everything
1738 :     compiles again.
1739 :    
1740 :     2. Added FormatComb and FORMAT_COMB to the CML version of the
1741 :     SML/NJ library (so that CML compiles again).
1742 :    
1743 :     3. Modified init scripts because XXX_DEFAULT environment variables
1744 :     are no longer with us. (Boot-time initialization is now done
1745 :     using the same environment variables that are also used for
1746 :     startup-time initialization of controls.)
1747 :    
1748 :     ----------------------------------------------------------------------
1749 : george 1192 Name: Lal George
1750 :     Date: 2002/05/15 09:20:10 EDT
1751 :     Tag: george-20020515-pseudo-op-decls
1752 :     Description:
1753 :    
1754 :     All pseudo-ops emitted before the first segment declaration
1755 :     such as TEXT, DATA, and BSS directives are assumed to be global
1756 :     declarations and are emitted first in the assembly file. This is
1757 :     useful in a number of situations where one has pseudo-ops that are not
1758 :     specific to any segment, and also works around the constraint that one
1759 :     cannot have client pseudo-ops in the TEXT segment.
1760 :    
1761 :     Because no segment is associated with these declarations it is
1762 :     an error to allocate any space or objects before the first segment
1763 :     directive and an exception will be raised. However, we cannot make
1764 :     this check for client pseudo-ops.
1765 :    
1766 :     These top level declarations are a field in the CFG graph_info.
1767 :     In theory you can continue to add to this field after the CFG has been
1768 :     built -- provided you know what you are doing;-)
1769 :    
1770 :     ----------------------------------------------------------------------
1771 : blume 1175 Name: Matthias Blume
1772 : blume 1190 Date: 2002/05/13 16:40:00 EDT
1773 :     Tag: blume-20020513-pp-etc
1774 :     Description:
1775 :    
1776 :     A few minor bugfixes:
1777 :    
1778 :     - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1779 :     (Bogus printouts for redefined bindings still occur. Compiler
1780 :     bug should no longer occur now. We need to redo the prettyprinter
1781 :     from scratch.)
1782 :    
1783 :     - CM pathname printer now also adds escape sequences for ( and )
1784 :    
1785 :     - commend and docu fixes for ml-nlffi
1786 :    
1787 :     ----------------------------------------------------------------------
1788 :     Name: Matthias Blume
1789 : blume 1189 Date: 2002/05/10 16:40:00 EDT
1790 :     Tag: blume-20020510-erg-textio
1791 :     Description:
1792 :    
1793 :     Applied the following bugfix provided by Emden Gansner:
1794 :    
1795 :     Output is corrupted when outputSubstr is used rather than output.
1796 :    
1797 :     The problem occurs when a substring
1798 :    
1799 :     ss = (s, dataStart, dataLen)
1800 :    
1801 :     where dataStart > 0, fills a stream buffer with avail bytes left.
1802 :     avail bytes of s, starting at index dataStart, are copied into the
1803 :     buffer, the buffer is flushed, and then the remaining dataLen-avail
1804 :     bytes of ss are copied into the beginning of the buffer. Instead of
1805 :     starting this copy at index dataStart+avail in s, the current code
1806 :     starts the copy at index avail.
1807 :    
1808 :     Fix:
1809 :     In text-io-fn.sml, change line 695 from
1810 :     val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1811 :     to
1812 :     val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1813 :    
1814 :     ----------------------------------------------------------------------
1815 :     Name: Matthias Blume
1816 : blume 1186 Date: 2002/04/12 13:55:00 EDT
1817 :     Tag: blume-20020412-assyntax
1818 :     Description:
1819 :    
1820 :     1. Grabbed newer assyntax.h from the XFree86 project.
1821 :     2. Fiddled with how to compile X86.prim.asm without warnings.
1822 :     3. (Very) Minor cleanup in CM.
1823 :    
1824 :     ----------------------------------------------------------------------
1825 :     Name: Matthias Blume
1826 : blume 1185 Date: 2002/04/01 (no joke!) 17:07:00 EST
1827 :     Tag: blume-20020401-x86div
1828 :     Description:
1829 :    
1830 :     Added full support for div/mod/rem/quot on the x86, using the machine
1831 :     instruction's two results (without clumsily recomputing the remainder)
1832 :     directly where appropriate.
1833 :    
1834 :     Some more extensive power-of-two support was added to the x86 instruction
1835 :     selector (avoiding expensive divs, mods, and muls where they can be
1836 :     replaced with cheaper shifts and masks). However, this sort of thing
1837 :     ought to be done earlier, e.g., within the CPS optimizer so that
1838 :     all architectures benefit from it.
1839 :    
1840 :     The compiler compiles to a fixed point, but changes might be somewhat
1841 :     fragile nevertheless. Please, report any strange things that you might
1842 :     see wrt. div/mod/quot/rem...
1843 :    
1844 :     ----------------------------------------------------------------------
1845 :     Name: Matthias Blume
1846 : blume 1184 Date: 2002/03/29 17:22:00
1847 :     Tag: blume-20020329-div
1848 :     Description:
1849 :    
1850 :     Fixed my broken div/mod logic. Unfortunately, this means that the
1851 :     inline code for div/mod now has one more comparison than before.
1852 :     Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1853 :     The problem was with quotient = 0, because that alone does not tell
1854 :     us which way the rounding went. One then has to look at whether
1855 :     remainder and divisor have the same sign... :(
1856 :    
1857 :     Anyway, I replaced the bootfiles with fresh ones...
1858 :    
1859 :     ----------------------------------------------------------------------
1860 :     Name: Matthias Blume
1861 : blume 1183 Date: 2002/03/29 14:10:00 EST
1862 :     Tag: blume-20020329-inlprims
1863 :     Description:
1864 :    
1865 :     NEW BOOTFILES!!! Version number bumped to 110.39.3.
1866 :    
1867 :     Primops have changed. This means that the bin/boot-file formats have
1868 :     changed as well.
1869 :    
1870 :     To make sure that there is no confusion, I made a new version.
1871 :    
1872 :    
1873 :     CHANGES:
1874 :    
1875 :     * removed REMT from mltree (remainder should never overflow).
1876 :    
1877 :     * added primops to deal with divisions of all flavors to the frontend
1878 :    
1879 :     * handled these primops all the way through so they map to their respective
1880 :     MLRISC support
1881 :    
1882 :     * used these primops in the implementation of Int, Int32, Word, Word32
1883 :    
1884 :     * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1885 :    
1886 :     * parameterized INLMIN, INLMAX, and INLABS by a numkind
1887 :    
1888 :     * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1889 :     floating point
1890 :    
1891 :     * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1892 :     and Real (but Real.abs maps to a separate floating-point-only primop)
1893 :    
1894 :    
1895 :     TODO items:
1896 :    
1897 :     * Hacked Alpha32 instruction selection, disabling the selection of REMx
1898 :     instructions because the machine instruction encoder cannot handle
1899 :     them. (Hppa, PPC, and Sparc instruction selection did not handle
1900 :     REM in the first place, and REM is supported by the x86 machine coder.)
1901 :    
1902 :     * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1903 :     selection phase. (The two can be streamlined because the hardware
1904 :     delivers both quotient and remainder at the same time anyway.)
1905 :    
1906 :     * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1907 :     (Currently the behavior is inconsistent both across architectures and
1908 :     wrt. the draft Basis spec.)
1909 :    
1910 :     * Word8 should eventually be handled natively, too.
1911 :    
1912 :     * There seems to be one serious bug in mltree-gen.sml. It appears, though,
1913 :     as if there currently is no execution path that could trigger it in
1914 :     SML/NJ. (The assumptions underlying functions arith and promotable do not
1915 :     hold for things like multiplication and division.)
1916 :    
1917 :     ----------------------------------------------------------------------
1918 :     Name: Matthias Blume
1919 : blume 1181 Date: 2002/03/27 16:27:00 EST
1920 :     Tag: blume-20020327-mlrisc-divisions
1921 :     Description:
1922 :    
1923 :     Added support for all four division operations (ML's div, mod, quot,
1924 :     and rem) to MLRISC. In the course of doing so, I also rationalized
1925 :     the naming (no more annoying switch-around of DIV and QUOT), by
1926 :     parameterizing the operation by div_rounding_mode (which can be either
1927 :     DIV_TO_ZERO or DIV_TO_NEGINF).
1928 :    
1929 :     The generic MLTreeGen functor takes care of compiling all four
1930 :     operations down to only round-to-zero div.
1931 :    
1932 :     Missing pieces:
1933 :    
1934 :     * Doing something smarter than relying on MLTreeGen on architectures
1935 :     like, e.g., the x86 where hardware division delivers both quotient and
1936 :     remainder at the same time. With this, the implementation of the
1937 :     round-to-neginf operations could be further streamlined.
1938 :    
1939 :     * Remove inlining support for div/mod/rem from the frontend and replace it
1940 :     with primops that get carried through to the backend. Do this for all
1941 :     int and word types.
1942 :    
1943 :     ----------------------------------------------------------------------
1944 :     Name: Matthias Blume
1945 : blume 1180 Date: 2002/03/25 17:25:00 EST
1946 :     Tag: blume-20020325-divmod
1947 :     Description:
1948 :    
1949 :     I improved (hopefully without breaking them) the implementation of Int.div,
1950 :     Int.mod, and Int.rem. For this, the code in translate.sml now takes
1951 :     advantage of the following observations:
1952 :    
1953 :     Let q = x quot y r = x rem y
1954 :     d = x div y m = x mod y
1955 :    
1956 :     where "quot" is the round-to-zero version of integer division that
1957 :     hardware usually provides. Then we have:
1958 :    
1959 :     r = x - q * y where neither the * nor the - will overflow
1960 :     d = if q >= 0 orelse x = q * y then q else q - 1
1961 :     where neither the * nor the - will overflow
1962 :     m = if q >= 0 orelse r = 0 then r else r + y
1963 :     where the + will not overflow
1964 :    
1965 :     This results in substantial simplification of the generated code.
1966 :     The following table shows the number of CFG nodes and edges generated
1967 :     for
1968 :     fun f (x, y) = x OPER y
1969 :     (* with OPER \in div, mod, quot, rem *)
1970 :    
1971 :    
1972 :     OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1973 :     --------------------------------------------------------
1974 :     div | 24 | 39 | 12 | 16
1975 :     mod | 41 | 71 | 12 | 16
1976 :     quot | 8 | 10 | 8 | 10
1977 :     rem | 10 | 14 | 8 | 10
1978 :    
1979 :    
1980 :     ----------------------------------------------------------------------
1981 :     Name: Matthias Blume
1982 : blume 1179 Date: 2002/03/25 22:06:00 EST
1983 :     Tag: blume-20020325-cprotobug
1984 :     Description:
1985 :    
1986 :     Fixed a bug in cproto (c prototype decoder).
1987 :    
1988 :     ----------------------------------------------------------------------
1989 :     Name: Matthias Blume
1990 : blume 1178 Date: 2002/03/25 16:00:00 EST
1991 :     Tag: blume-20020325-raw-primops
1992 :     Description:
1993 :    
1994 :     I did some cleanup to Allen's new primop code and
1995 :     replaced yesterday's bootfiles with new ones.
1996 :     (But they are stored in the same place.)
1997 :    
1998 :     ----------------------------------------------------------------------
1999 :     Name: Matthias Blume
2000 : blume 1175 Date: 2002/03/24 22:40:00 EST
2001 :     Tag: blume-20020324-bootfiles
2002 :     Description:
2003 :    
2004 :     Made the bootfiles that Allen asked for.
2005 :    
2006 :     ----------------------------------------------------------------------
2007 : leunga 1174 Name: Allen Leung
2008 :     Date: 2002/03/23 15:50:00 EST
2009 :     Tag: leunga-20020323-flint-cps-rcc-primops
2010 :     Description:
2011 :    
2012 :     1. Changes to FLINT primops:
2013 :    
2014 :     (* make a call to a C-function;
2015 :     * The primop carries C function prototype information and specifies
2016 :     * which of its (ML-) arguments are floating point. C prototype
2017 :     * information is for use by the backend, ML information is for
2018 :     * use by the CPS converter. *)
2019 :     | RAW_CCALL of { c_proto: CTypes.c_proto,
2020 :     ml_args: ccall_type list,
2021 :     ml_res_opt: ccall_type option,
2022 :     reentrant : bool
2023 :     } option
2024 :     (* Allocate uninitialized storage on the heap.
2025 :     * The record is meant to hold short-lived C objects, i.e., they
2026 :     * are not ML pointers. With the tag, the representation is
2027 :     * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
2028 :     *)
2029 :     | RAW_RECORD of {tag:bool,sz:int}
2030 :     and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
2031 :    
2032 :     2. These CPS primops are now overloaded:
2033 :    
2034 :     rawload of {kind:numkind}
2035 :     rawstore of {kind:numkind}
2036 :    
2037 :     The one argument form is:
2038 :    
2039 :     rawload {kind} address
2040 :    
2041 :     The two argument form is:
2042 :    
2043 :     rawload {kind} [ml object, byte-offset]
2044 :    
2045 :     3. RAW_CCALL/RCC now takes two extra arguments:
2046 :    
2047 :     a. The first is whether the C call is reentrant, i.e., whether
2048 :     ML state should be saved and restored.
2049 :     b. The second argument is a string argument specifying the name of
2050 :     library and the C function.
2051 :    
2052 :     These things are currently not handled in the code generator, yet.
2053 :    
2054 :     4. In CProto,
2055 :    
2056 :     An encoding type of "bool" means "ml object" and is mapped into
2057 :     C prototype of PTR. Note that "bool" is different than "string",
2058 :     even though "string" is also mapped into PTR, because "bool"
2059 :     is assigned an CPS type of BOGt, while "string" is assigned INT32t.
2060 :    
2061 :     5. Pickler/unpicker
2062 :    
2063 :     Changed to handle RAW_RECORD and newest RAW_CCALL
2064 :    
2065 :     6. MLRiscGen,
2066 :    
2067 :     1. Changed to handle the new rawload/rawstore/rawrecord operators.
2068 :     2. Code for handling C Calls has been moved to a new module CPSCCalls,
2069 :     in the file CodeGen/cpscompile/cps-c-calls.sml
2070 :    
2071 :     7. Added the conditional move operator
2072 :    
2073 :     condmove of branch
2074 :    
2075 :     to cps. Generation of this is still buggy so it is currently
2076 :     disabled.
2077 :    
2078 :     ----------------------------------------------------------------------
2079 : george 1168 Name: Lal George
2080 :     Date: 2002/03/22 14:18:25 EST
2081 : george 1171 Tag: george-20020322-cps-branch-prob
2082 : george 1168 Description:
2083 :    
2084 : george 1171 Implemented the Ball-Larus branch prediction-heuristics, and
2085 : george 1168 incorporated graphical viewers for control flow graphs.
2086 :    
2087 : george 1171 Ball-Larus Heuristics:
2088 : george 1168 ---------------------
2089 :     See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
2090 :    
2091 :     By design it uses the Dempster-Shafer theory for combining
2092 :     probabilities. For example, in the function:
2093 :    
2094 :     fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
2095 :    
2096 :     the ball-larus heuristics predicts that the n=0 is unlikely
2097 :     (OH-heuristic), and the 'then' branch is unlikely because of the
2098 :     RH-heuristic -- giving the 'then' branch an even lower combined
2099 : george 1171 probability using the Dempster-Shafer theory.
2100 : george 1168
2101 :     Finally, John Reppy's loop analysis in MLRISC, further lowers the
2102 :     probability of the 'then' branch because of the loop in the else
2103 :     branch.
2104 :    
2105 :    
2106 :     Graphical Viewing:
2107 :     ------------------
2108 :     I merely plugged in Allen's graphical viewers into the compiler. The
2109 :     additional code is not much. At the top level, saying:
2110 :    
2111 :     Control.MLRISC.getFlag "cfg-graphical-view" := true;
2112 :    
2113 :     will display the graphical view of the control flow graph just before
2114 :     back-patching. daVinci must be in your path for this to work. If
2115 :     daVinci is not available, then the default viewer can be changed
2116 :     using:
2117 :    
2118 :     Control.MLRISC.getString "viewer"
2119 :    
2120 :     which can be set to "dot" or "vcg" for the corresponding viewers. Of
2121 :     course, these viewers must be in your path.
2122 :    
2123 :     The above will display the compilation unit at the level of clusters,
2124 :     many of which are small, boring, and un-interesting. Also setting:
2125 :    
2126 :     Control.MLRISC.getInt "cfg-graphical-view_size"
2127 :    
2128 :     will display clusters that are larger than the value set by the above.
2129 :    
2130 :    
2131 :     ----------------------------------------------------------------------
2132 : blume 1159 Name: Matthias Blume
2133 :     Date: 2002/03/21 22:20:00 EST
2134 :     Tag: blume-20020321-kmp-bugfix
2135 :     Description:
2136 :    
2137 :     Changed the interface to the KMP routine in PreString and fixed
2138 :     a minor bug in one place where it was used.
2139 :    
2140 :     ----------------------------------------------------------------------
2141 : leunga 1156 Name: Allen Leung
2142 : leunga 1158 Date: 2002/03/21 20:30:00 EST
2143 :     Tag: leunga-20020321-cfg
2144 :     Description:
2145 :    
2146 :     Fixed a potential problem in cfg edge splitting.
2147 :    
2148 :     ----------------------------------------------------------------------
2149 :     Name: Allen Leung
2150 : leunga 1156 Date: 2002/03/21 17:15:00 EST
2151 :     Tag: leunga-20020321-x86-fp-cfg
2152 :     Description:
2153 :    
2154 :     1. Recoded the buggy parts of x86-fp.
2155 :    
2156 :     a. All the block reordering code has been removed.
2157 :     We now depend on the block placement phases to do this work.
2158 :    
2159 :     b. Critical edge splitting code has been simplified and moved into the
2160 :     CFG modules, as where they belong.
2161 :    
2162 :     Both of these were quite buggy and complex. The code is now much, much
2163 :     simpler.
2164 :    
2165 :     2. X86 backend.
2166 :    
2167 :     a. Added instructions for 64-bit support. Instruction selection for
2168 :     64-bit has not been committed, however, since that
2169 :     requires changes to MLTREE which haven't been approved by
2170 :     Lal and John.
2171 :    
2172 :     b. Added support for FUCOMI and FUCOMIP when generating code for
2173 :     PentiumPro and above. We only generate these instructions in
2174 :     the fast-fp mode.
2175 :    
2176 :     c. Added cases for JP and JNP in X86FreqProps.
2177 :    
2178 :     3. CFG
2179 :    
2180 :     CFG now has a bunch of methods for edge splitting and merging.
2181 :    
2182 :     4. Machine description.
2183 :    
2184 :     John's simplification of MLTREE_BASIS.fcond broke a few machine
2185 :     description things:
2186 :    
2187 :     rtl-build.{sig,sml} and hppa.mdl fixed.
2188 :    
2189 :     NOTE: the machine description stuff in the repository is still broken.
2190 :     Again, I can't put my fixes in because that involves
2191 :     changes to MLTREE.
2192 :    
2193 :     ----------------------------------------------------------------------
2194 : blume 1145 Name: Matthias Blume
2195 : blume 1155 Date: 2002/03/20 15:55:00 EST
2196 :     Tag: blume-20020320-kmp
2197 :     Description:
2198 :    
2199 :     Implemented Knuth-Morris-Pratt string matching in PreString and used
2200 :     it for String.isSubstring, Substring.isSubstring, and
2201 :     Substring.position.
2202 :    
2203 :     (Might need some stress-testing. Simple examples worked fine.)
2204 :    
2205 :     ----------------------------------------------------------------------
2206 :     Name: Matthias Blume
2207 : blume 1152 Date: 2002/03/19 16:37:00 EST
2208 :     Tag: blume-20020319-witnesses
2209 :     Description:
2210 :    
2211 :     Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
2212 :    
2213 :     This implements a generic mechanism for changing constness qualifiers
2214 :     anywhere within big C types without resorting to outright "casts".
2215 :     (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
2216 :     modify the constness at the outermost level.)
2217 :     The implementation of "convert" is based on the idea of "witness"
2218 :     values -- values that are not used by the operation but whose types
2219 :     "testify" to their applicability. On the implementation side, "convert"
2220 :     is simply a projection (returning its second curried argument). With
2221 :     cross-module inlining, it should not result in any machine code being
2222 :     generated.
2223 :    
2224 :     ----------------------------------------------------------------------
2225 :     Name: Matthias Blume
2226 : blume 1148 Date: 2002/03/15 16:40:00 EST
2227 :     Tag: blume-20020315-basis
2228 :     Description:
2229 :    
2230 :     Provided (preliminary?) implementations for
2231 :    
2232 :     {String,Substring}.{concatWith,isSuffix,isSubstring}
2233 :    
2234 :     and
2235 :    
2236 :     Substring.full
2237 :    
2238 :     Those are in the Basis spec but they were missing in SML/NJ.
2239 :    
2240 :     ----------------------------------------------------------------------
2241 :     Name: Matthias Blume
2242 : blume 1145 Date: 2002/03/14 21:30:00 EST
2243 :     Tag: blume-20020314-controls
2244 :     Description:
2245 :    
2246 :     Controls:
2247 :     ---------
2248 :    
2249 :     1. Factored out the recently-added Controls : CONTROLS stuff and put
2250 :     it into its own library $/controls-lib.cm. The source tree for
2251 :     this is under src/smlnj-lib/Controls.
2252 :    
2253 :     2. Changed the names of types and functions in this interface, so they
2254 :     make a bit more "sense":
2255 :    
2256 :     module -> registry
2257 :     'a registry -> 'a group
2258 :    
2259 :     3. The interface now deals in ref cells only. The getter/setter interface
2260 :     is (mostly) gone.
2261 :    
2262 :     4. Added a function that lets one register an already-existing ref cell.
2263 :    
2264 :     5. Made the corresponding modifications to the rest of the code so that
2265 :     everything compiles again.
2266 :    
2267 :     6. Changed the implementation of Controls.MLRISC back to something closer
2268 :     to the original. In particular, this module (and therefore MLRISC)
2269 :     does not depend on Controls. There now is some link-time code in
2270 :     int-sys.sml that registers the MLRISC controls with the Controls
2271 :     module.
2272 :    
2273 :     CM:
2274 :     ---
2275 :    
2276 :     * One can now specify the lambda-split aggressiveness in init.cmi.
2277 :    
2278 :     ----------------------------------------------------------------------
2279 : leunga 1142 Name: Allen Leung
2280 :     Date: 2002/03/13 17:30:00 EST
2281 :     Tag: leunga-20020313-x86-fp-unary
2282 :     Description:
2283 :    
2284 :     Bug fix for:
2285 :    
2286 :     > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
2287 :     > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
2288 :     > - fun f(x,(y,z)) = Real.~ y;
2289 :     > [autoloading]
2290 :     > [autoloading done]
2291 :     > fchsl (%eax), 184(%esp)
2292 :     > Error: MLRisc bug: X86MCEmitter.emitInstr
2293 :     >
2294 :     > uncaught exception Error
2295 :     > raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
2296 :    
2297 :     The problem was that the code generator did not generate any fp registers
2298 :     in this case, and the ra didn't know that it needed to run the X86FP phase to
2299 :     translate the pseudo fp instruction. This only happened with unary fp
2300 :     operators in certain situations.
2301 :    
2302 :     ----------------------------------------------------------------------
2303 : blume 1137 Name: Matthias Blume
2304 : blume 1140 Date: 2002/03/13 14:00:00 EST
2305 :     Tag: blume-20020313-overload-etc
2306 :     Description:
2307 :    
2308 :     1. Added _overload as a synonym for overload for backward compatibility.
2309 :     (Control.overloadKW must be true for either version to be accepted.)
2310 :    
2311 :     2. Fixed bug in install script that caused more things to be installed
2312 :     than what was requested in config/targets.
2313 :    
2314 :     3. Made CM aware of the (_)overload construct so that autoloading
2315 :     works.
2316 :    
2317 :     ----------------------------------------------------------------------
2318 :     Name: Matthias Blume
2319 : blume 1138 Date: 2002/03/12 22:03:00 EST
2320 :     Tag: blume-20020312-url
2321 :     Description:
2322 :    
2323 :     Forgot to update BOOT and srcarchiveurl.
2324 :    
2325 :     ----------------------------------------------------------------------
2326 :     Name: Matthias Blume
2327 : blume 1137 Date: 2002/03/12 17:30:00 EST
2328 :     Tag: blume-20020312-version110392
2329 :     Description:
2330 :    
2331 :     Yet another version number bump (because of small changes to the
2332 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
2333 :    
2334 :     Changes:
2335 :    
2336 :     The new pid generation scheme described a few weeks ago was overly
2337 :     complicated. I implemented a new mechanism that is simpler and
2338 :     provides a bit more "stability": Once CM has seen a compilation
2339 :     unit, it keeps its identity constant (as long as you do not delete
2340 :     those crucial CM/GUID/* files). This means that when you change
2341 : blume 1145 an interface, compile, then go back to the old interface, and
2342 : blume 1137 compile again, you arrive at the original pid.
2343 :    
2344 :     There now also is a mechanism that instructs CM to use the plain
2345 :     environment hash as a module's pid (effectively making its GUID
2346 :     the empty string). For this, "noguid" must be specified as an
2347 :     option to the .sml file in question within its .cm file.
2348 :     This is most useful for code that is being generated by tools such
2349 :     as ml-nlffigen (because during development programmers tend to
2350 :     erase the tool's entire output directory tree including CM's cached
2351 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
2352 :     revert to the old, broken behavior of SML/NJ, but in specific cases
2353 :     where there is no danger of interface confusion, its use is ok
2354 :     (I think).
2355 :    
2356 :     ml-nlffigen by default generates "noguid" annotations. They can be
2357 :     turned off by specifying -guid in its command line.
2358 :    
2359 :     ----------------------------------------------------------------------
2360 : george 1136 Name: Lal George
2361 :     Date: 2002/03/12 12 14:42:36 EST
2362 :     Tag: george-20020312-frequency-computation
2363 :     Description:
2364 :    
2365 :     Integrated jump chaining and static block frequency into the
2366 :     compiler. More details and numbers later.
2367 : leunga 1025
2368 : george 1003 ----------------------------------------------------------------------
2369 : george 1133 Name: Lal George
2370 :     Date: 2002/03/11 11 22:38:53 EST
2371 :     Tag: george-20020311-jump-chain-elim
2372 :     Description:
2373 :    
2374 :     Tested the jump chain elimination on all architectures (except the
2375 :     hppa). This is on by default right now and is profitable for the
2376 :     alpha and x86, however, it may not be profitable for the sparc and ppc
2377 :     when compiling the compiler.
2378 :    
2379 :     The gc test will typically jump to a label at the end of the cluster,
2380 :     where there is another jump to an external cluster containing the actual
2381 :     code to invoke gc. This is to allow factoring of common gc invocation
2382 :     sequences. That is to say, we generate:
2383 :    
2384 :     f:
2385 :     testgc
2386 :     ja L1 % jump if above to L1
2387 :    
2388 :     L1:
2389 :     jmp L2
2390 :    
2391 :    
2392 :     After jump chain elimination the 'ja L1' instructions is converted to
2393 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
2394 :     up being implemented in their long form (if L2 is far away) using:
2395 :    
2396 :     jbe L3 % jump if below or equal to L3
2397 :     jmp L2
2398 :     L3:
2399 :     ...
2400 :    
2401 :    
2402 :     For large compilation units L2 may be far away.
2403 :    
2404 :    
2405 :     ----------------------------------------------------------------------
2406 : blume 1132 Name: Matthias Blume
2407 :     Date: 2002/03/11 13:30:00 EST
2408 :     Tag: blume-20020311-mltreeeval
2409 :     Description:
2410 :    
2411 :     A functor parameter was missing.
2412 :    
2413 :     ----------------------------------------------------------------------
2414 : leunga 1130 Name: Allen Leung
2415 : leunga 1131 Date: 2002/03/11 10:30:00 EST
2416 : leunga 1142 Tag: leunga-20020311-runtime-string0
2417 : leunga 1131 Description:
2418 :    
2419 :     The representation of the empty string now points to a
2420 :     legal null terminated C string instead of unit. It is now possible
2421 :     to convert an ML string into C string with InlineT.CharVector.getData.
2422 :     This compiles into one single machine instruction.
2423 :    
2424 :     ----------------------------------------------------------------------
2425 :     Name: Allen Leung
2426 : leunga 1130 Date: 2002/03/10 23:55:00 EST
2427 :     Tag: leunga-20020310-x86-call
2428 :     Description:
2429 :    
2430 :     Added machine generation for CALL instruction (relative displacement mode)
2431 :    
2432 :     ----------------------------------------------------------------------
2433 : blume 1128 Name: Matthias Blume
2434 :     Date: 2002/03/08 16:05:00
2435 :     Tag: blume-20020308-entrypoints
2436 :     Description:
2437 :    
2438 :     Version number bumped to 110.39.1. NEW BOOTFILES!
2439 :    
2440 :     Entrypoints: non-zero offset into a code object where execution should begin.
2441 :    
2442 :     - Added the notion of an entrypoint to CodeObj.
2443 :     - Added reading/writing of entrypoint info to Binfile.
2444 :     - Made runtime system bootloader aware of entrypoints.
2445 :     - Use the address of the label of the first function given to mlriscGen
2446 :     as the entrypoint. This address is currently always 0, but it will
2447 :     not be 0 once we turn on block placement.
2448 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
2449 :     with entry points) from mlriscGen.
2450 :    
2451 :     ----------------------------------------------------------------------
2452 : leunga 1127 Name: Allen Leung
2453 :     Date: 2002/03/07 20:45:00 EST
2454 :     Tag: leunga-20020307-x86-cmov
2455 :     Description:
2456 :    
2457 :     Bug fixes for CMOVcc on x86.
2458 :    
2459 :     1. Added machine code generation for CMOVcc
2460 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
2461 :     3. CMOVcc cannot have an immediate operand as argument.
2462 :    
2463 :     ----------------------------------------------------------------------
2464 : blume 1126 Name: Matthias Blume
2465 :     Date: 2002/03/07 16:15:00 EST
2466 :     Tag: blume-20020307-controls
2467 :     Description:
2468 :    
2469 :     This is a very large but mostly boring patch which makes (almost)
2470 :     every tuneable compiler knob (i.e., pretty much everything under
2471 :     Control.* plus a few other things) configurable via both the command
2472 :     line and environment variables in the style CM did its configuration
2473 :     until now.
2474 :    
2475 :     Try starting sml with '-h' (or, if you are brave, '-H')
2476 :    
2477 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
2478 :     implements the underlying generic mechanism.
2479 :    
2480 :     The interface to some of the existing such facilities has changed somewhat.
2481 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
2482 :     (The getFoo interface is still there for backward-compatibility, but its
2483 :     use is deprecated.)
2484 :    
2485 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
2486 :     that one can now twiddle the compiler settings when using this "batch"
2487 :     compiler.
2488 :    
2489 :     TODO items:
2490 :    
2491 :     We should go through and throw out all controls that are no longer
2492 :     connected to anything. Moreover, we should go through and provide
2493 :     meaningful (and correct!) documentation strings for those controls
2494 :     that still are connected.
2495 :    
2496 :     Currently, multiple calls to Controls.new are accepted (only the first
2497 :     has any effect). Eventually we should make sure that every control
2498 :     is being made (via Controls.new) exactly once. Future access can then
2499 :     be done using Controls.acc.
2500 :    
2501 :     Finally, it would probably be a good idea to use the getter-setter
2502 :     interface to controls rather than ref cells. For the time being, both
2503 :     styles are provided by the Controls module, but getter-setter pairs are
2504 :     better if thread-safety is of any concern because they can be wrapped.
2505 :    
2506 :     *****************************************
2507 :    
2508 :     One bug fix: The function blockPlacement in three of the MLRISC
2509 :     backpatch files used to be hard-wired to one of two possibilities at
2510 :     link time (according to the value of the placementFlag). But (I
2511 :     think) it should rather sense the flag every time.
2512 :    
2513 :     *****************************************
2514 :    
2515 :     Other assorted changes (by other people who did not supply a HISTORY entry):
2516 :    
2517 :     1. the cross-module inliner now works much better (Monnier)
2518 :     2. representation of weights, frequencies, and probabilities in MLRISC
2519 :     changed in preparation of using those for weighted block placement
2520 :     (Reppy, George)
2521 :    
2522 :     ----------------------------------------------------------------------
2523 : george 1116 Name: Lal George
2524 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
2525 :     Tag: george-20020307-weighted-block-placement
2526 :    
2527 :     Tested the weighted block placement optimization on all architectures
2528 :     (except the hppa) using AMPL to generate the block and edge frequencies.
2529 :     Changes were required in the machine properties to correctly
2530 :     categorize trap instructions. There is an MLRISC flag
2531 :     "weighted-block-placement" that can be used to enable weighted block
2532 :     placement, but this will be ineffective without block/edge
2533 :     frequencies (coming soon).
2534 :    
2535 :    
2536 :     ----------------------------------------------------------------------
2537 :     Name: Lal George
2538 : george 1116 Date: 2002/03/05 17:24:48 EST
2539 :     Tag: george-20020305-linkage-cluster
2540 :    
2541 : george 1124 In order to support the block placement optimization, a new cluster
2542 :     is generated as the very first cluster (called the linkage cluster).
2543 :     It contains a single jump to the 'real' entry point for the compilation
2544 :     unit. Block placement has no effect on the linkage cluster itself, but
2545 :     all the other clusters have full freedom in the manner in which they
2546 :     reorder blocks or functions.
2547 : george 1116
2548 :     On the x86 the typical linkage code that is generated is:
2549 :     ----------------------
2550 :     .align 2
2551 :     L0:
2552 :     addl $L1-L0, 72(%esp)
2553 : george 1124 jmp L1
2554 : george 1116
2555 :    
2556 :     .align 2
2557 :     L1:
2558 :     ----------------------
2559 :    
2560 :     72(%esp) is the memory location for the stdlink register. This
2561 :     must contain the address of the CPS function being called. In the
2562 : george 1124 above example, it contains the address of L0; before
2563 : george 1116 calling L1 (the real entry point for the compilation unit), it
2564 :     must contain the address for L1, and hence
2565 :    
2566 :     addl $L1-L0, 72(%esp)
2567 :    
2568 : george 1124 I have tested this on all architectures except the hppa.The increase
2569 :     in code size is of course negligible
2570 : george 1116
2571 :     ----------------------------------------------------------------------
2572 : leunga 1115 Name: Allen Leung
2573 :     Date: 2002/03/03 13:20:00 EST
2574 :     Tag: leunga-20020303-mlrisc-tools
2575 :    
2576 :     Added #[ ... ] expressions to mlrisc tools
2577 :    
2578 :     ----------------------------------------------------------------------
2579 : blume 1096 Name: Matthias Blume
2580 : blume 1098 Date: 2002/02/27 12:29:00 EST
2581 :     Tag: blume-20020227-cdebug
2582 :     Description:
2583 :    
2584 :     - made types in structure C and C_Debug to be equal
2585 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
2586 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
2587 :    
2588 :     ----------------------------------------------------------------------
2589 :     Name: Matthias Blume
2590 : blume 1096 Date: 2002/02/26 12:00:00 EST
2591 :     Tag: blume-20020226-ffi
2592 :     Description:
2593 :    
2594 :     1. Fixed a minor bug in CM's "noweb" tool:
2595 :     If numbering is turned off, then truly don't number (i.e., do not
2596 :     supply the -L option to noweb). The previous behavior was to supply
2597 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
2598 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
2599 :    
2600 :     2. Once again, I reworked some aspects of the FFI:
2601 :    
2602 :     A. The incomplete/complete type business:
2603 :    
2604 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
2605 :     gone!
2606 :     - ML types representing an incomplete type are now *equal* to
2607 :     ML types representing their corresponding complete types (just like
2608 :     in C). This is still safe because ml-nlffigen will not generate
2609 :     RTTI for incomplete types, nor will it generate functions that
2610 :     require access to such RTTI. But when ML code generated from both
2611 :     incomplete and complete versions of the C type meet, the ML types
2612 :     are trivially interoperable.
2613 :    
2614 :     NOTE: These changes restore the full generality of the translation
2615 :     (which was previously lost when I eliminated functorization)!
2616 :    
2617 :     B. Enum types:
2618 :    
2619 :     - Structure C now has a type constructor "enum" that is similar to
2620 :     how the "su" constructor works. However, "enum" is not a phantom
2621 :     type because each "T enum" has values (and is isomorphic to
2622 :     MLRep.Signed.int).
2623 :     - There are generic access operations for enum objects (using
2624 :     MLRep.Signed.int).
2625 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
2626 :     * The structure contains the definition of type "mlrep" (the ML-side
2627 :     representation type of the enum). Normally, mlrep is the same
2628 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
2629 :     then mlrep will be defined as a datatype -- thus facilitating
2630 :     pattern matching on mlrep values.
2631 :     ("-ec" will be suppressed if there are duplicate values in an
2632 :     enumeration.)
2633 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
2634 :     will be generated for each C enum constant xxx.
2635 :     * Conversion functions m2i and i2m convert between mlrep and
2636 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
2637 :     * Coversion functions c and ml convert between mlrep and "tag enum".
2638 :     * Access functions (get/set) fetch and store mlrep values.
2639 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
2640 :     enumerations are merged into one single enumeration represented by
2641 :     structure E_'.
2642 :    
2643 :     ----------------------------------------------------------------------
2644 : leunga 1080 Name: Allen Leung
2645 : leunga 1094 Date: 2002/02/25 04:45:00 EST
2646 :     Tag: leunga-20020225-cps-spill
2647 :    
2648 :     This is a new implementation of the CPS spill phase.
2649 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
2650 :     In case of problems, replace it with the old file spill.sml
2651 :    
2652 :     The current compiler runs into some serious performance problems when
2653 :     constructing a large record. This can happen when we try to compile a
2654 :     structure with many items. Even a very simple structure like the following
2655 :     makes the compiler slow down.
2656 :    
2657 :     structure Foo = struct
2658 :     val x_1 = 0w1 : Word32.int
2659 :     val x_2 = 0w2 : Word32.int
2660 :     val x_3 = 0w3 : Word32.int
2661 :     ...
2662 :     val x_N = 0wN : Word32.int
2663 :     end
2664 :    
2665 :     The following table shows the compile time, from N=1000 to N=4000,
2666 :     with the old compiler:
2667 :    
2668 :     N
2669 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
2670 :     MLRISC ra 0.06u 0.00s 0.05g
2671 :     (spills = 0 reloads = 0)
2672 :     TOTAL 0.63u 0.07s 0.21g
2673 :    
2674 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
2675 :     MLRISC ra 5.68u 0.59s 3.93g
2676 :     (spills = 0 reloads = 0)
2677 :     TOTAL 14.71u 0.99s 4.81g
2678 :    
2679 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
2680 :     MLRISC ra 5.54u 0.65s 3.91g
2681 :     (spills = 543 reloads = 1082)
2682 :     TOTAL 65.40u 3.13s 6.00g
2683 :    
2684 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
2685 :     MLRISC ra 0.80u 0.10s 0.55g
2686 :     (spills = 42 reloads = 84)
2687 :     TOTAL 129.42u 5.10s 4.13g
2688 :    
2689 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
2690 :     MLRISC ra 2.69u 0.27s 1.38g
2691 :     (spills = 62 reloads = 124)
2692 :     TOTAL 682.48u 19.61s 13.99g
2693 :    
2694 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
2695 :     MLRISC ra 4.96u 0.27s 2.72g
2696 :     (spills = 85 reloads = 170)
2697 :     TOTAL 2375.26u 57.21s 48.00g
2698 :    
2699 :     As you can see the old cps spill module suffers from some serious
2700 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
2701 :     instead of patching the problems up, I'm reimplementing it
2702 : leunga 1094 with a different algorithm. The new code is more modular,
2703 :     smaller when compiled, and substantially faster
2704 :     (O(n log n) time and O(n) space). Timing of the new spill module:
2705 :    
2706 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
2707 :     MLRISC ra 0.25u 0.02s 0.15g
2708 :     (spills=1 reloads=3)
2709 :     TOTAL 7.74u 0.34s 1.62g
2710 :    
2711 :     Implementation details:
2712 :    
2713 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
2714 :     number of live variables at any program point (the bandwidth)
2715 :     does not exceed a certain limit, which is determined by the
2716 :     size of the spill area.
2717 :    
2718 :     When the bandwidth is too large, we decrease the register pressure by
2719 :     packing live variables into spill records. How we achieve this is
2720 :     completely different than what we did in the old code.
2721 :    
2722 :     First, there is something about the MLRiscGen code generator
2723 :     that we should be aware of:
2724 :    
2725 :     o MLRiscGen performs code motion!
2726 :    
2727 :     In particular, it will move floating point computations and
2728 :     address computations involving only the heap pointer to
2729 :     their use sites (if there is only a single use).
2730 :     What this means is that if we have a CPS record construction
2731 :     statement
2732 :    
2733 :     RECORD(k,vl,w,e)
2734 :    
2735 :     we should never count the new record address w as live if w
2736 :     has only one use (which is often the case).
2737 :    
2738 :     We should do something similar to floating point, but the transformation
2739 :     there is much more complex, so I won't deal with that.
2740 :    
2741 :     Secondly, there are now two new cps primops at our disposal:
2742 :    
2743 :     1. rawrecord of record_kind option
2744 :     This pure operator allocates some uninitialized storage from the heap.
2745 :     There are two forms:
2746 :    
2747 :     rawrecord NONE [INT n] allocates a tagless record of length n
2748 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
2749 :     and initializes the tag.
2750 :    
2751 :     2. rawupdate of cty
2752 :     rawupdate cty (v,i,x)
2753 :     Assigns to x to the ith component of record v.
2754 :     The storelist is not updated.
2755 :    
2756 :     We use these new primops for both spilling and increment record construction.
2757 :    
2758 :     1. Spilling.
2759 :    
2760 :     This is implemented with a linear scan algorithm (but generalized
2761 :     to trees). The algorithm will create a single spill record at the
2762 :     beginning of the cps function and use rawupdate to spill to it,
2763 :     and SELECT or SELp to reload from it. So both spills and reloads
2764 :     are fine-grain operations. In contrast, in the old algorithm
2765 :     "spills" have to be bundled together in records.
2766 :    
2767 :     Ideally, we should sink the spill record construction to where
2768 :     it is needed. We can even split the spill record into multiple ones
2769 :     at the places where they are needed. But CPS is not a good
2770 :     representation for global code motion, so I'll keep it simple and
2771 :     am not attempting this.
2772 :    
2773 :     2. Incremental record construction (aka record splitting).
2774 :    
2775 :     Long records with many component values which are simulatenously live
2776 :     (recall that single use record addresses are not considered to
2777 :     be live) are constructed with rawrecord and rawupdate.
2778 :     We allocate space on the heap with rawrecord first, then gradually
2779 :     fill it in with rawupdate. This is the technique suggested to me
2780 :     by Matthias.
2781 :    
2782 :     Some restrictions on when this is applicable:
2783 :     1. It is not a VECTOR record. The code generator currently does not handle
2784 :     this case. VECTOR record uses double indirection like arrays.
2785 :     2. All the record component values are defined in the same "basic block"
2786 :     as the record constructor. This is to prevent speculative
2787 :     record construction.
2788 :    
2789 :     ----------------------------------------------------------------------
2790 :     Name: Allen Leung
2791 : leunga 1086 Date: 2002/02/22 01:02:00 EST
2792 :     Tag: leunga-20020222-mlrisc-tools
2793 :    
2794 :     Minor bug fixes in the parser and rewriter
2795 :    
2796 :     ----------------------------------------------------------------------
2797 :     Name: Allen Leung
2798 : leunga 1085 Date: 2002/02/21 20:20:00 EST
2799 :     Tag: leunga-20020221-peephole
2800 :    
2801 :     Regenerated the peephole files. Some contained typos in the specification
2802 :     and some didn't compile because of pretty printing bugs in the old version
2803 :     of 'nowhere'.
2804 :    
2805 :     ----------------------------------------------------------------------
2806 :     Name: Allen Leung
2807 : leunga 1079 Date: 2002/02/19 20:20:00 EST
2808 :     Tag: leunga-20020219-mlrisc-tools
2809 :     Description:
2810 :    
2811 :     Minor bug fixes to the mlrisc-tools library:
2812 :    
2813 :     1. Fixed up parsing colon suffixed keywords
2814 :     2. Added the ability to shut the error messages up
2815 :     3. Reimplemented the pretty printer and fixed up/improved
2816 :     the pretty printing of handle and -> types.
2817 :     4. Fixed up generation of literal symbols in the nowhere tool.
2818 :     5. Added some SML keywords to to sml.sty
2819 :    
2820 :     ----------------------------------------------------------------------
2821 :     Name: Matthias Blume
2822 : blume 1078 Date: 2002/02/19 16:20:00 EST
2823 :     Tag: blume-20020219-cmffi
2824 :     Description:
2825 :    
2826 :     A wild mix of changes, some minor, some major:
2827 :    
2828 :     * All C FFI-related libraries are now anchored under $c:
2829 :     $/c.cm --> $c/c.cm
2830 :     $/c-int.cm --> $c/internals/c-int.cm
2831 :     $/memory.cm --> $c/memory/memory.cm
2832 :    
2833 :     * "make" tool (in CM) now treats its argument pathname slightly
2834 :     differently:
2835 :     1. If the native expansion is an absolute name, then before invoking
2836 :     the "make" command on it, CM will apply OS.Path.mkRelative
2837 :     (with relativeTo = OS.FileSys.getDir()) to it.
2838 :     2. The argument will be passed through to subsequent phases of CM
2839 :     processing without "going native". In particular, if the argument
2840 :     was an anchored path, then "make" will not lose track of that anchor.
2841 :    
2842 :     * Compiler backends now "know" their respective C calling conventions
2843 :     instead of having to be told about it by ml-nlffigen. This relieves
2844 :     ml-nlffigen from one of its burdens.
2845 :    
2846 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
2847 :    
2848 :     * Export C_DEBUG and C_Debug from $c/c.cm.
2849 :    
2850 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
2851 :     subtyping relationship between incomplete pointers and their complete
2852 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
2853 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
2854 :     the pointer target type is complete. In the incomplete case, 'o
2855 :     will be instantiated with some "'c iobj" -- a type obtained by
2856 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
2857 :    
2858 :     Operations that work on both incomplete and complete pointer types are
2859 :     typed as taking an 'o ptr while operations that require the target to
2860 :     be known are typed as taking some ('t, 'c) obj ptr.
2861 :    
2862 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
2863 :     where void is an eqtype without any values. This makes it possible
2864 :     to work on voidptr values using functions meant to operate on light
2865 :     incomplete pointers.
2866 :    
2867 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
2868 :     been vastly simplified.
2869 :    
2870 :     ----------------------------------------------------------------------
2871 :     Name: Matthias Blume
2872 : blume 1076 Date: 2002/02/19 10:48:00 EST
2873 :     Tag: blume-20020219-pqfix
2874 :     Description:
2875 :    
2876 :     Applied Chris Okasaki's bug fix for priority queues.
2877 :    
2878 :     ----------------------------------------------------------------------
2879 :     Name: Matthias Blume
2880 : blume 1073 Date: 2002/02/15 17:05:00
2881 : blume 1069 Tag: Release_110_39
2882 :     Description:
2883 :    
2884 : blume 1073 Last-minute retagging is becoming a tradition... :-(
2885 :    
2886 :     This is the working release 110.39.
2887 :    
2888 :     ----------------------------------------------------------------------
2889 :     Name: Matthias Blume
2890 :     Date: 2002/02/15 16:00:00 EST
2891 :     Tag: Release_110_39-orig
2892 :     Description:
2893 :    
2894 : blume 1069 Working release 110.39. New bootfiles.
2895 :    
2896 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
2897 :     with all shells. So I retagged. -Matthias)
2898 :    
2899 : blume 1069 ----------------------------------------------------------------------
2900 :     Name: Matthias Blume
2901 : blume 1068 Date: 2002/02/15 14:17:00 EST
2902 :     Tag: blume-20020215-showbindings
2903 :     Description:
2904 :    
2905 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
2906 :     the latter can be useful for exploring what bindings are available at
2907 :     the interactive prompt. (The first function returns only the list
2908 :     of symbols that are really bound, the second prints those but also the
2909 :     ones that CM's autoloading mechanism knows about.)
2910 :    
2911 :     ----------------------------------------------------------------------
2912 :     Name: Matthias Blume
2913 : blume 1067 Date: 2002/02/15 12:08:00 EST
2914 :     Tag: blume-20020215-iptrs
2915 :     Description:
2916 :    
2917 :     Two improvements to ml-nlffigen:
2918 :    
2919 :     1. Write files only if they do not exist or if their current contents
2920 :     do not coincide with what's being written. (That is, avoid messing
2921 :     with the time stamps unless absolutely necessary.)
2922 :    
2923 :     2. Implement a "repository" mechanism for generated files related
2924 :     to "incomplete pointer types". See the README file for details.
2925 :    
2926 :     ----------------------------------------------------------------------
2927 :     Name: Matthias Blume
2928 : blume 1066 Date: 2002/02/14 11:50:00 EST
2929 :     Tag: blume-20020214-quote
2930 :     Description:
2931 :    
2932 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
2933 :     because of the new and improved tag generation scheme. (Thanks to Allen
2934 :     Leung for pointing it out.)
2935 :    
2936 :     ----------------------------------------------------------------------
2937 : george 1065 Name: Lal George
2938 :     Date: 2002/02/14 09:55:27 EST 2002
2939 :     Tag: george-20020214-isabelle-bug
2940 :     Description:
2941 :    
2942 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
2943 :     of Isabelle on the x86.
2944 :    
2945 :     From Allen:
2946 :     -----------
2947 :     I've found the problem:
2948 :    
2949 :     in ra-core.sml, I use the counter "blocked" to keep track of the
2950 :     true number of elements in the freeze queue. When the counter goes
2951 :     to zero, I skip examining the queue. But I've messed up the
2952 :     bookkeeping in combine():
2953 :    
2954 :     else ();
2955 :     case !ucol of
2956 :     PSEUDO => (if !cntv > 0 then
2957 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
2958 :     ^^^^^^^^^^^^^^^^^^^^^^^
2959 :     moveu := mergeMoveList(!movev, !moveu)
2960 :     )
2961 :     else ();
2962 :    
2963 :     combine() is called to coalesce two nodes u and v.
2964 :     I think I was thinking that if the move counts of u and v are both
2965 :     greater than zero then after they are coalesced then one node is
2966 :     removed from the freeze queue. Apparently I was thinking that
2967 :     both u and v are of low degree, but that's clearly not necessarily true.
2968 :    
2969 :    
2970 :     02/12/2002:
2971 :     Here's the patch. HOL now compiles.
2972 :    
2973 :     I don't know how this impact on performance (compile
2974 :     time or runtime). This bug caused the RA (especially on the x86)
2975 :     to go thru the potential spill phase when there are still nodes on the
2976 :     freeze queue.
2977 :    
2978 :    
2979 :    
2980 :    
2981 :     ----------------------------------------------------------------------
2982 : blume 1058 Name: Matthias Blume
2983 : blume 1064 Date: 2002/02/13 22:40:00 EST
2984 :     Tag: blume-20020213-fptr-rtti
2985 :     Description:
2986 :    
2987 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
2988 :     updates.
2989 :    
2990 :     ----------------------------------------------------------------------
2991 :     Name: Matthias Blume
2992 : blume 1063 Date: 2002/02/13 16:41:00 EST
2993 :     Tag: blume-20020213-cmlpq
2994 :     Description:
2995 :    
2996 :     Added new priority queue export symbols (which have just been added to
2997 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
2998 :     not compile and the installer would choke.)
2999 :    
3000 :     ----------------------------------------------------------------------
3001 :     Name: Matthias Blume
3002 : blume 1062 Date: 2002/02/13 16:15:00 EST
3003 :     Tag: blume-20020213-various
3004 :     Description:
3005 :    
3006 :     1. More tweaks to ml-nlffigen:
3007 :    
3008 :     - better internal datastructures (resulting in slight speedup)
3009 :     - "-match" option requires exact match
3010 :     - "localized" gensym counters (untagged structs/unions nested within
3011 :     other structs/unions or within typedefs get a fresh counter; their
3012 :     tag will be prefixed by a concatenation of their parents' tags)
3013 :     - bug fixes (related to calculation of transitive closure of types
3014 :     to be included in the output)
3015 :    
3016 :     2. Minor Basis updates:
3017 :    
3018 :     - added implementations for List.collate and Option.app
3019 :    
3020 :     ----------------------------------------------------------------------
3021 :     Name: Matthias Blume
3022 : blume 1060 Date: 2002/02/11 15:55:00 EST
3023 :     Tag: blume-20020211-gensym
3024 :     Description:
3025 :    
3026 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
3027 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
3028 :     names (ML structure names that correspond to unnamed C structs, unions,
3029 :     and enums), so that separate runs of ml-nlffigen do not clash.
3030 :    
3031 :     ----------------------------------------------------------------------
3032 :     Name: Matthias Blume
3033 : blume 1059 Date: 2002/02/11 12:05:00 EST
3034 :     Tag: blume-20020211-gensml
3035 :     Description:
3036 :    
3037 :     A quick fix for a problem with GenSML (in the pgraph-util library):
3038 :     Make generation of toplevel "local" optional. (Strictly speaking,
3039 :     signature definitions within "local" are not legal SML.)
3040 :    
3041 :     Other than that: updates to INSTALL and cm/TODO.
3042 :    
3043 :     ----------------------------------------------------------------------
3044 :     Name: Matthias Blume
3045 : blume 1058 Date: 2002/02/08 15:00:00 EST
3046 :     Tag: blume-20020208-uniquepid
3047 :     Description:
3048 :    
3049 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
3050 :    
3051 :     1. The installer (config/install.sh) has gotten smarter:
3052 :    
3053 :     - Configuration options are a bit easier to specify now
3054 :     (in config/targets).
3055 :     - Bug in recognizing .tar.bz2 files fixed.
3056 :     - Installer automatically resolves dependencies between
3057 :     configuration options (e.g., if you ask for eXene, you will
3058 :     also get cml -- regardless whether you asked for it or not).
3059 :     - Installer can run in "quieter mode" by setting the environment
3060 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
3061 :     "completely silent", though.
3062 :     - Build HashCons library as part of smlnj-lib.
3063 :    
3064 :     2. A new scheme for assigning persistent identifiers to compilation
3065 :     units (and, by extension, to types etc.) has been put into place.
3066 :     This fixes a long-standing bug where types and even dynamic values
3067 :     can get internally confused, thereby compromising type safety
3068 :     (abstraction) and dynamic correctness. See
3069 :    
3070 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
3071 :    
3072 :     for an example of how things could go wrong until now.
3073 :    
3074 :     The downside of the new scheme is that pids are not quite as
3075 :     persistent as they used to be: CM will generate a fresh pid
3076 :     for every compilation unit that it thinks it sees for the first
3077 :     time. That means that if you compile starting from a clean, fresh
3078 :     source tree at two different times, you end up with different
3079 :     binaries.
3080 :    
3081 :     Cutoff recompilation, however, has not been compromised because
3082 :     CM keeps pid information in special caches between runs.
3083 :    
3084 :     ----------------------------------------------------------------------
3085 : george 1053 Name: Lal George
3086 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
3087 :     Tag: <none>
3088 :     Description:
3089 :    
3090 :     Compilers that generate assembly code may produce global labels
3091 :     whose value is resolved at link time. The various peephole optimization
3092 :     modules did not take this in account.
3093 :    
3094 :     TODO. The Labels.addrOf function should really return an option
3095 :     type so that clients are forced to deal with this issue, rather
3096 :     than an exception being raised.
3097 :    
3098 :     ----------------------------------------------------------------------
3099 :     Name: Lal George
3100 : george 1053 Date: 2002/02/06 13:55:02 EST
3101 :     Tag: george-20020206-ra-breakup
3102 :     Description:
3103 :    
3104 :     1. A bug fix from Allen.
3105 :    
3106 :     A typo causes extra fstp %st(0)'s to be generated at compensation
3107 :     edges, which might cause stack underflow traps at runtime. This
3108 :     occurs in fft where there are extraneous fstps right before the 'into'
3109 :     trap instruction (in this case they are harmless since none of the
3110 :     integers overflow.)
3111 :    
3112 : george 1054 2. Pulled out various utility modules that were embedded in the modules
3113 : george 1053 of the register allocator. I need these modules for other purposes, but
3114 : george 1054 they are not complete enough to put into a library (just yet).
3115 : george 1053 ----------------------------------------------------------------------
3116 : blume 1049 Name: Matthias Blume
3117 :     Date: 2002/01/31 16:05:00 EST
3118 :     Tag: blume-20020131-sparc-ccalls
3119 :     Description:
3120 :    
3121 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
3122 :     of extra stack space by mistake. Fixed.
3123 :    
3124 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
3125 :    
3126 :     ----------------------------------------------------------------------
3127 : leunga 1048 Name: Allen Leung
3128 :     Date: 2002/01/30
3129 :     Tag: leunga-20020130-nowhere-bug-fix
3130 :     Description:
3131 :    
3132 :     MLRISC bug fixes:
3133 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
3134 :     2. MachineInt.fromString was negating its value.
3135 :    
3136 :     ----------------------------------------------------------------------
3137 : blume 1039 Name: Matthias Blume
3138 : blume 1047 Date: 2002/01/29
3139 :     Tag: blume-20020129-INSTALL
3140 :     Description:
3141 :    
3142 :     - Added somewhat detailed installation instructions (file INSTALL).
3143 :     - Fixed curl-detection bug in config/install.sh.
3144 :     - It is now possible to select the URL getter using the URLGETTER
3145 :     environment variable:
3146 :    
3147 :     not set / "unknown" --> automatic detection (script tries wget,
3148 :     curl, and lynx)
3149 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
3150 :     how to properly invoke them)
3151 :     other --> use $URLGETTER directly, it must take
3152 :     precisely two command-line arguments
3153 :     (source URL and destination file name)
3154 :    
3155 :     ----------------------------------------------------------------------
3156 :     Name: Matthias Blume
3157 : blume 1044 Date: 2002/01/28
3158 : blume 1045 Tag: blume-20020128-sparc-ccalls
3159 :     Description:
3160 :    
3161 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
3162 :     - Make use of the allocParam argument in sparc-c-calls.
3163 :    
3164 :     ----------------------------------------------------------------------
3165 :     Name: Matthias Blume
3166 :     Date: 2002/01/28
3167 : blume 1044 Tag: blume-20020128-allocParam
3168 :     Description:
3169 :    
3170 :     John Reppy: Changes c-calls API to accept client-callback for
3171 :     allocating extra stack space.
3172 :     me: Corresponding changes to mlriscGen (using a dummy argument that
3173 :     does not change the current behavior).
3174 :    
3175 :     ----------------------------------------------------------------------
3176 :     Name: Matthias Blume
3177 : blume 1040 Date: 2002/01/28 12:00:00
3178 :     Tag: Release_110_38
3179 :     Description:
3180 :    
3181 :     This time for real!!!
3182 :    
3183 :     ----------------------------------------------------------------------
3184 :     Name: Matthias Blume
3185 : blume 1039 Date: 2002/01/28 10:56:00 EST
3186 :     Tag: blume-20020128-retraction
3187 :     Description:
3188 :    
3189 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
3190 :     with blume-Release_110_38-retracted.)
3191 :    
3192 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
3193 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
3194 :    
3195 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
3196 :     and enums fixed. The naming of corresponding ML identifiers should
3197 :     now be consistent again.
3198 :    
3199 :     ----------------------------------------------------------------------
3200 : leunga 1038 Name: Allen Leung
3201 :     Date: 2002/01/27
3202 :     Tag: leunga-20020127-nowhere
3203 :     Description:
3204 :    
3205 :     Added a target called nowhere in the configuration scripts.
3206 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
3207 :     programs with where-clauses into legal SML code) during installation.
3208 :    
3209 :     ----------------------------------------------------------------------
3210 : blume 1036 Name: Matthias Blume
3211 : leunga 1038 Date: 2002/01/25 21:27:00 EST
3212 : blume 1039 Tag: blume-Release_110_38-retracted
3213 : blume 1037 Description:
3214 :    
3215 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
3216 :    
3217 :     README will be added later.
3218 :    
3219 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
3220 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
3221 :    
3222 : blume 1037 ----------------------------------------------------------------------
3223 :     Name: Matthias Blume
3224 : blume 1036 Date: 2002/01/25
3225 :     Tag: blume-20020125-ffi
3226 :     Description:
3227 :    
3228 :     A large number of tweaks and improvements to ml-nlffi-lib and
3229 :     ml-nlffigen:
3230 :    
3231 :     - ML represenation types have been streamlined
3232 :     - getter and setter functions work with concrete values, not abstract
3233 :     ones where possible
3234 :     - ml-nlffigen command line more flexible (see README file there)
3235 :     - some bugs have been fixed (hopefully)
3236 :    
3237 :     ----------------------------------------------------------------------
3238 : george 1034 Name: Lal George
3239 :     Date: 2002/01/24
3240 :     Tag: george-20020124-risc-ra-interface
3241 :     Description:
3242 :    
3243 :     There is a dramatic simplification in the interface to the
3244 :     register allocator for RISC architectures as a result of making
3245 :     parallel copy instructions explicit.
3246 :    
3247 :     ----------------------------------------------------------------------
3248 : blume 1028 Name: Matthias Blume
3249 : blume 1032 Date: 2002/01/22
3250 :     Tag: blume-20020122-x86-ccalls
3251 :     Description:
3252 :    
3253 :     Bug fix for c-calls on x86 (having to do with how char- and
3254 :     short-arguments are being handled).
3255 :    
3256 :     ----------------------------------------------------------------------
3257 :     Name: Matthias Blume
3258 : blume 1031 Date: 2002/01/21
3259 :     Tag: blume-20020121-ff
3260 :     Description:
3261 :    
3262 :     Another day of fiddling with the FFI...
3263 :    
3264 :     1. Bug fix/workaround: CKIT does not complain about negative array
3265 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
3266 :     (Otherwise a negative dimension would send it into an infinite loop.)
3267 :    
3268 :     2. Some of the abstract types (light objects, light pointers, most "base"
3269 :     types) in structure C are now eqtypes.
3270 :    
3271 :     3. Added constructors and test functions for NULL function pointers.
3272 :    
3273 :     ----------------------------------------------------------------------
3274 :     Name: Matthias Blume
3275 : blume 1028 Date: 2002/01/18
3276 : blume 1030 Tag: blume-20020118-ready-for-new-release
3277 :     Description:
3278 :    
3279 :     Made config/srcarchiveurl point to a new place. (Will provide boot
3280 :     files shortly.)
3281 :    
3282 :     Maybe we christen this to be 110.38?
3283 :    
3284 :     ----------------------------------------------------------------------
3285 :     Name: Matthias Blume
3286 :     Date: 2002/01/18
3287 : blume 1029 Tag: blume-20020118-more-ffifiddle
3288 :     Description:
3289 :    
3290 :     Today's FFI fiddling:
3291 :    
3292 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
3293 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
3294 :     of abstract ones.
3295 :    
3296 :     - Provided word-style bit operations etc. for "int" representation
3297 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
3298 :     and Long.
3299 :    
3300 :     ----------------------------------------------------------------------
3301 :     Name: Matthias Blume
3302 :     Date: 2002/01/18
3303 : blume 1028 Tag: blume-20020118-use-x86-fp
3304 :     Description:
3305 :    
3306 :     Now that x86-fast-fp seems to be working, I turned it back on again
3307 :     by default. (Seems to work fine now, even with the FFI.)
3308 :    
3309 :     Other than that, I added some documentation about the FFI to
3310 :     src/ml-nlffigen/README and updated the FFI test examples in
3311 :     src/ml-nlffi-lib/Tests/*.
3312 :    
3313 :     ----------------------------------------------------------------------
3314 : leunga 1025 Name: Allen Leung
3315 :     Date: 2002/01/17
3316 :     Tag: leunga-20020117-x86-fast-fp-call
3317 :     Description:
3318 :    
3319 :     1. Fixed a problem with handling return fp values when x86's fast fp
3320 :     mode is turned on.
3321 :    
3322 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
3323 :     of %f32.
3324 :    
3325 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
3326 :    
3327 :     ----------------------------------------------------------------------
3328 : blume 1021 Name: Matthias Blume
3329 :     Date: 2002/01/16
3330 :     Tag: blume-20020116-ffifiddle
3331 :     Description:
3332 :    
3333 :     More fiddling with the FFI interface:
3334 :    
3335 :     - Make constness 'c instead of rw wherever possible. This eliminates
3336 :     the need for certain explicit coercions. (However, due to ML's
3337 :     value polymorphism, there will still be many cases where explicit
3338 :     coercions are necessary. Phantom types are not the whole answer
3339 :     to modeling a subtyping relationship in ML.)
3340 :    
3341 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
3342 :    
3343 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
3344 :     clumsy workaround for varargs problem.)
3345 :    
3346 :     ----------------------------------------------------------------------
3347 : george 1016 Name: Lal George
3348 :     Date: 2002/01/15
3349 :     Tag: <none>
3350 :     Description:
3351 :    
3352 :     1. Since COPY instructions are no longer native to the architecture,
3353 :     a generic functor can be used to implement the expandCopies function.
3354 :    
3355 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
3356 :     TEXT segment.
3357 :    
3358 :     ----------------------------------------------------------------------
3359 : blume 1011 Name: Matthias Blume
3360 : blume 1015 Date: 2002/01/15
3361 :     Tag: blume-20020115-ffiupdates
3362 :     Description:
3363 :    
3364 :     1. Fix for bug resulting in single-precision float values being returned
3365 :     incorrectly from FFI calls.
3366 :    
3367 :     2. Small modifications to C FFI API:
3368 :    
3369 :     - memory-allocation routines return straight objects (no options)
3370 :     and raise an exception in out-of-memory situations
3371 :     - unsafe extensions to cast between function pointers and pointers
3372 :     from/to ints
3373 :     - added structure C_Debug as an alternative to structure C where
3374 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
3375 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
3376 :     but also takes a (possibly empty) list of existing library handles
3377 :     that the current library depends on
3378 :    
3379 :     ----------------------------------------------------------------------
3380 :     Name: Matthias Blume
3381 : blume 1011 Date: 2002/01/10
3382 :     Tag: blume-20020110-newffigen
3383 :     Description:
3384 :    
3385 :     1. Updates to portable graph code.
3386 :    
3387 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
3388 :     more scalable now so that even huge interfaces such as the one
3389 :     for GTK compile in finite time and space. :-)
3390 :     See src/ml-nlffigen/README for details on what's new.
3391 :    
3392 :     ----------------------------------------------------------------------
3393 : george 1003 Name: Lal George
3394 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
3395 :     Tag: george-20011206-rm-native-copy
3396 :     Description:
3397 :    
3398 :     Removed the native COPY and FCOPY instructions
3399 :     from all the architectures and replaced it with the
3400 :     explicit COPY instruction from the previous commit.
3401 :    
3402 :     It is now possible to simplify many of the optimizations
3403 :     modules that manipulate copies. This has not been
3404 :     done in this change.
3405 :    
3406 :     ----------------------------------------------------------------------
3407 :     Name: Lal George
3408 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
3409 :     Tag: george-20011206-mlrisc-instruction
3410 :     Description:
3411 : george 824
3412 : george 1003 Changed the representation of instructions from being fully abstract
3413 :     to being partially concrete. That is to say:
3414 :    
3415 :     from
3416 :     type instruction
3417 :    
3418 :     to
3419 :     type instr (* machine instruction *)
3420 :    
3421 :     datatype instruction =
3422 :     LIVE of {regs: C.cellset, spilled: C.cellset}
3423 :     | KILL of {regs: C.cellset, spilled: C.cellset}
3424 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
3425 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
3426 :     | INSTR of instr
3427 :    
3428 :     This makes the handling of certain special instructions that appear on
3429 :     all architectures easier and uniform.
3430 :    
3431 :     LIVE and KILL say that a list of registers are live or killed at the
3432 :     program point where they appear. No spill code is generated when an
3433 :     element of the 'regs' field is spilled, but the register is moved to
3434 :     the 'spilled' (which is present, more for debugging than anything else).
3435 :    
3436 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
3437 :     We used to generate:
3438 :    
3439 :     DEFFREG f1
3440 :     f1 := f2 + f3
3441 :     trapb
3442 :    
3443 :     but now generate:
3444 :    
3445 :     f1 := f2 + f3
3446 :     trapb
3447 :     LIVE {regs=[f1,f2,f3], spilled=[]}
3448 :    
3449 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
3450 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
3451 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
3452 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
3453 :     this architecture).
3454 :    
3455 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
3456 :     all the architectures. This will result in further simplification of the
3457 :     register allocator that must be aware of them for coalescing purposes, and
3458 :     will also simplify certain aspects of the machine description that provides
3459 :     callbacks related to parallel copies.
3460 :    
3461 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
3462 :     machine instruction set!
3463 :    
3464 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
3465 :     functions for making porting easier -- essentially converting upper case
3466 :     to lower case. All machine instructions (of type instr) are in upper case,
3467 :     and the lower case form generates an MLRISC instruction. For example on
3468 :     the alpha we have:
3469 :    
3470 :     datatype instr =
3471 :     LDA of {r:cell, b:cell, d:operand}
3472 :     | ...
3473 :    
3474 :     val lda : {r:cell, b:cell, d:operand} -> instruction
3475 :     ...
3476 :    
3477 :     where lda is just (INSTR o LDA), etc.
3478 :    
3479 : leunga 815 ----------------------------------------------------------------------
3480 : blume 986 Name: Matthias Blume
3481 : blume 993 Date: 2001/11/22 21:40:00 EST
3482 :     Tag: Release_110_37
3483 :     Description:
3484 :    
3485 :     Release 110.37. This time for real.
3486 :    
3487 :     ----------------------------------------------------------------------
3488 :     Name: Matthias Blume
3489 : blume 988 Date: 2001/11/21 16:35:00 EST
3490 :     Tag: blume-20011121-foot-in-mouth
3491 :     Description:
3492 :    
3493 :     Removed the "Release_110_37" tag because of a serious bug.
3494 :     This will be re-tagged once the bug is fixed.
3495 :    
3496 :     ----------------------------------------------------------------------
3497 :     Name: Matthias Blume
3498 : blume 987 Date: 2001/11/21 16:14:00 EST
3499 :     Tag: blume-20011121-forgottenfile
3500 :     Description:
3501 :    
3502 :     Forgot to add a file. (Just a .tex-file -- part of
3503 :     the CM manual source.)
3504 :    
3505 :     ----------------------------------------------------------------------
3506 :     Name: Matthias Blume
3507 : blume 986 Date: 2001/11/21 16:10:00 EST
3508 : blume 988 Tag: blume-20011121-invalid_110_37
3509 : blume 986 Description:
3510 :    
3511 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
3512 :     because we found a serious bug in all non-x86 backends.
3513 :     - Matthias
3514 :    
3515 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
3516 :     so that code object name strings are directly inserted into code
3517 :     objects at code generation time. The only business the runtime system
3518 :     has with this is now to read the name strings on occasions.
3519 :     (The encoding of the name string has also changed somewhat.)
3520 :    
3521 :     2. CM now implements a simple "set calculus" for specifying export lists.
3522 :     In particular, it is now possible to refer to the export lists of
3523 :     other libraries/groups/sources and form unions as well as differences.
3524 :     See the latest CM manual for details.
3525 :    
3526 :     3. An separate notion of "proxy" libraries has again be eliminated from
3527 :     CM's model. (Proxy libraries are now simply a special case of using
3528 :     the export list calculus.)
3529 :    
3530 :     4. Some of the existing libraries now take advantage of the new set
3531 :     calculus.
3532 :     (Notice that not all libraries have been converted because some
3533 :     of the existing .cm-files are supposed to be backward compatible
3534 :     with 110.0.x.)
3535 :    
3536 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
3537 :     "General.exnMessage"! The former relies on a certain hook to be
3538 :     initialized, and that often does not happen in the stand-alone case.)
3539 :    
3540 :     ----------------------------------------------------------------------
3541 : george 984 Name: Lal George
3542 :     Date: 2001/11/21 13:56:18 EST
3543 :     Tag: george-2001121-pseudo-ops
3544 :     Description:
3545 :    
3546 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
3547 :     ought to never be any question of incompatabilities with
3548 :     pseudo-op syntax expected by host assemblers.
3549 :    
3550 :     For now, only modules supporting GAS syntax are implemented
3551 :     but more should follow, such as MASM, and vendor assembler
3552 :     syntax, e.g. IBM as, Sun as, etc.
3553 :    
3554 :     ----------------------------------------------------------------------
3555 : blume 977 Name: Matthias Blume
3556 :     Date: 2001/11/14 11:52:00 EST
3557 :     Tag: blume-20011114-srcname
3558 :     Description:
3559 :    
3560 :     1. Routed the name of the current source file to mlriscgen where it
3561 :     should be directly emitted into the code object. (This last part
3562 :     is yet to be done.)
3563 :    
3564 :     2. Some cleanup of the pgraph code to make it match the proposal that
3565 :     I put out the other day. (The proposal notwithstanding, things are
3566 :     still in flux here.)
3567 :    
3568 :     ----------------------------------------------------------------------
3569 : george 976 Name: Lal George
3570 :     Date: 2001/11/14 09:44:04 EST
3571 :     Tag:
3572 :     Description:
3573 :    
3574 :     Fix for a backpatching bug reported by Allen.
3575 :    
3576 :     Because the boundary between short and long span-dependent
3577 :     instructions is +/- 128, there are an astounding number of
3578 :     span-dependent instructions whose size is over estimated.
3579 :    
3580 :     Allen came up with the idea of letting the size of span
3581 :     dependent instructions be non-monotonic, for a maxIter
3582 :     number of times, after which the size must be monotonically
3583 :     increasing.
3584 :    
3585 :     This table shows the number of span-dependent instructions
3586 :     whose size was over-estimated as a function of maxIter, for the
3587 :     file Parse/parse/ml.grm.sml:
3588 :    
3589 :     maxIter # of instructions:
3590 :     10 687
3591 :     20 438
3592 :     30 198
3593 :     40 0
3594 :    
3595 :     In compiling the compiler, there is no significant difference in
3596 :     compilation speed between maxIter=10 and maxIter=40. Actually,
3597 :     my measurements showed that maxIter=40 was a tad faster than
3598 :     maxIter=10! Also 96% of the files in the compiler reach a fix
3599 :     point within 13 iterations, so fixing maxIter at 40, while high,
3600 :     is okay.
3601 :    
3602 :     ----------------------------------------------------------------------
3603 : blume 975 Name: Matthias Blume
3604 :     Date: 2001/10/31 15:25:00 EST
3605 :     Tag: blume-20011031-pgraph
3606 :     Description:
3607 :    
3608 :     CKIT:
3609 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
3610 :     argument identifiers.
3611 :     * Changed the return type of TypeUtil.getFunction accordingly.
3612 :     * Type equality ignores the argument names.
3613 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
3614 :     if there is a mismatch.
3615 :    
3616 :     installation script:
3617 :     * attempts to use "curl" if available (unless "wget" is available as well)
3618 :    
3619 :     CM:
3620 :     * has an experimental implementation of "portable graphs" which I will
3621 :     soon propose as an implementation-independent library format
3622 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
3623 :    
3624 :     NLFFI-LIB:
3625 :     * some cleanup (all cosmetic)
3626 :    
3627 :     NLFFIGEN:
3628 :     * temporarily disabled the mechanism that suppresses ML output for
3629 :     C definitions whose identifiers start with an underscore character
3630 :     * generate val bindings for enum constants
3631 :     * user can request that only one style (light or heavy) is being used;
3632 :     default is to use both (command-line arguments: -heavy and -light)
3633 :     * fixed bug in handling of function types involving incomplete pointers
3634 :     * generate ML entry points that take record arguments (i.e., using
3635 :     named arguments) for C functions that have a prototype with named
3636 :     arguments
3637 :     (see changes to CKIT)
3638 :    
3639 :     ----------------------------------------------------------------------
3640 : leunga 972 Name: Allen Leung
3641 :     Date: 2001/10/27 20:34:00 EDT
3642 :     Tag: leunga-20011027-x86-fast-fp-call
3643 :     Description:
3644 :    
3645 :     Fixed the bug described in blume-20010920-slowfp.
3646 :    
3647 :     The fix involves
3648 :     1. generating FCOPYs in FSTP in ia32-svid
3649 :     2. marking a CALL with the appropriate annotation
3650 :    
3651 :     ----------------------------------------------------------------------
3652 : blume 961 Name: Matthias Blume
3653 :     Date: 2001/10/16 11:32:00 EDT
3654 :     Tag: blume-20011016-netbsd
3655 :     Description:
3656 :    
3657 :     Underscore patch from Chris Richards (fixing problem with compiling
3658 :     runtime system under recent NetBSD).
3659 :    
3660 :     ----------------------------------------------------------------------
3661 : george 959 Name: Allen Leung
3662 :     Date: 2001/10/12 17:18:32 EDT 2001
3663 :     Tag: leung-20011012-x86-printflowgraph
3664 :     Description:
3665 :    
3666 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
3667 :    
3668 :     ----------------------------------------------------------------------
3669 : george 952 Name: Lal George
3670 : george 958 Date: 2001/10/11 23:51:34 EDT
3671 :     Tag: george-20011011-too-many-instrs
3672 :     Description:
3673 :    
3674 :     The representation of a program point never expected to see more
3675 :     than 65536 instructions in a basic block!
3676 :    
3677 :     ----------------------------------------------------------------------
3678 :     Name: Lal George
3679 : george 952 Date: 2001/10/09 09:41:37 EDT
3680 :     Tag: george-20011008-mlrisc-labels
3681 :     Description:
3682 :    
3683 :     Changed the machine description files to support printing of
3684 :     local and global labels in assembly code, based on host assembler
3685 :     conventions.
3686 :    
3687 :     ----------------------------------------------------------------------
3688 : blume 916 Name: Matthias Blume
3689 : blume 939 Date: 2001/09/25 15:25:00 EDT
3690 :     Tag: blume-20010925-exninfo
3691 :     Description:
3692 :    
3693 :     I provided a non-hook implementation of exnName (at the toplevel) and
3694 :     made the "dummy" implementation of exnMessage (at the toplevel) more
3695 :     useful: if nothing gets "hooked in", then at least you are going to
3696 :     see the exception name and a message indicating why you don't see more.
3697 :    
3698 :     [For the time being, programs that need exnMessage and want to use
3699 :     ml-build should either use General.exnMessage (strongly recommended) or
3700 :     refer to structure General at some other point so that CM sees a
3701 :     static dependency.]
3702 :    
3703 :     [Similar remarks go for "print" and "use": If you want to use their
3704 :     functionality in stand-alone programs generated by ml-build, then use
3705 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
3706 :    
3707 :     ----------------------------------------------------------------------
3708 :     Name: Matthias Blume
3709 : blume 938 Date: 2001/09/20 17:28:00 EDT
3710 :     Tag: blume-20010920-slowfp
3711 :     Description:
3712 :    
3713 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
3714 :    
3715 :     ----------------------------------------------------------------------
3716 :     Name: Matthias Blume
3717 : blume 937 Date: 2001/09/20 17:20:00 EDT
3718 :     Tag: blume-20010920-canonicalpaths
3719 :     Description:
3720 :    
3721 :     0. Updated the BOOT file (something that I forgot to do earlier).
3722 :    
3723 :     1. Small internal change to CM so that it avoids "/../" in filenames
3724 :     as much as possible (but only where it is safe).
3725 :    
3726 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
3727 :     that arguments that contain delimiters are passed through correctly.
3728 :     This change also means that all "special" arguments of the form
3729 :     @SMLxxx... must come first.
3730 :    
3731 :     3. Changed install script to put relative anchor names for tool commands
3732 :     into pathconfig.
3733 :    
3734 :     ----------------------------------------------------------------------
3735 :     Name: Matthias Blume
3736 : blume 932 Date: 2001/09/18 15:35:00 EDT
3737 :     Tag: blume-20010918-readme11036
3738 :     Description:
3739 :    
3740 :     Added README files.
3741 :    
3742 :     ----------------------------------------------------------------------
3743 :     Name: Matthias Blume
3744 : blume 929 Date: 2001/09/18 11:45:00 EDT
3745 :     Tag: Release_110_36 (retag)
3746 :     Description:
3747 :    
3748 :     Fixed mistake in config/preloads. Retagged as 110.36.
3749 :    
3750 :     ----------------------------------------------------------------------
3751 :     Name: Matthias Blume
3752 : blume 928 Date: 2001/09/18 09:40:00 EDT
3753 : blume 929 Tag: Release_110_36_orig (tag changed)
3754 : blume 928 Description:
3755 :    
3756 :     New version (110.36). New bootfiles.
3757 :    
3758 :     ----------------------------------------------------------------------
3759 :     Name: Matthias Blume
3760 : blume 927 Date: 2001/09/14 16:15:00 EDT
3761 :     Tag: blume-20010914-x86fastfp
3762 :     Description:
3763 :    
3764 :     John committed some changes that Allen made, in particular a (hopefully)
3765 :     correctly working version of the x86-fp module.
3766 :    
3767 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
3768 :     flag to "true". Everything seems to compile to a fixpoint ok, and
3769 :     "mandelbrot" speeds up by about 15%.
3770 :    
3771 :     ----------------------------------------------------------------------
3772 :     Name: Matthias Blume
3773 : blume 923 Date: 2001/09/13 11:20:00 EDT
3774 :     Tag: blume-20010913-minimal
3775 :     Description:
3776 :    
3777 :     1. Stefan Monnier's patch to fix a miscompilation problem that
3778 :     was brought to light by John Reppy's work on Moby.
3779 :    
3780 :     2. Implemented a minimal "structure Compiler" that contains just
3781 :     "version" and "architecture". The minimal version will be
3782 :     available when the full version is not. This is for backward-
3783 :     compatibility with code that wants to test Compiler.version.
3784 :    
3785 :     ----------------------------------------------------------------------
3786 :     Name: Matthias Blume
3787 : blume 920 Date: 2001/08/28 14:03:00 EDT
3788 :     Tag: blume-20010828-ml-lex
3789 :     Description:
3790 :    
3791 :     Fix for bug 1581, received from Neophytos Michael.
3792 :    
3793 :     ----------------------------------------------------------------------
3794 :     Name: Matthias Blume
3795 : blume 918 Date: 2001/08/27 11:20:00 EDT
3796 :     Tag: blume-20010827-readme11035
3797 :     Description:
3798 :    
3799 :     Fleshed out the README file for 110.35.
3800 :    
3801 :     ----------------------------------------------------------------------
3802 :     Name: Matthias Blume
3803 : blume 916 Date: 2001/08/24 17:10:00 EDT
3804 :     Tag: Release_110_35
3805 :     Description:
3806 :    
3807 :     New version number (110.35). New bootfiles.
3808 :    
3809 :     ----------------------------------------------------------------------
3810 : george 915 Name: Lal George
3811 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
3812 :     Tag: george-20010824-MLRISC-graphs
3813 :     Description:
3814 :    
3815 :     removed clusters from MLRISC completely and replaced with graphs.
3816 :    
3817 :     ----------------------------------------------------------------------
3818 :     Name: Matthias Blume
3819 : blume 905 Date: 2001/08/23 17:50:00 EDT
3820 :     Tag: blume-20010823-toplevel
3821 :     Description:
3822 :    
3823 :     - some reorganization of the code that implements various kinds of
3824 :     environments in the compiler (static, dynamic, symbolic, combined)
3825 :     - re-implemented the EnvRef module so that evalStream works properly
3826 :     (if the stream contains references to "use", "CM.make", etc.)
3827 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
3828 :    
3829 :     ----------------------------------------------------------------------
3830 :     Name: Matthias Blume
3831 : blume 904 Date: 2001/08/20 15:50 EDT
3832 :     Tag: blume20010820-slipup
3833 :     Description:
3834 :    
3835 :     I forgot to commit a few files. Here they are...
3836 :    
3837 :     ----------------------------------------------------------------------
3838 :     Name: Matthias Blume
3839 : blume 903 Date: 2001/08/20 15:35:00 EDT
3840 :     Tag: blume-20010820-debugprof
3841 :     Description:
3842 :    
3843 :     !!!! NEW BOOTFILES !!!!
3844 :    
3845 :     This is another round of reorganizing the compiler sources. This
3846 :     time the main goal was to factor out all the "instrumentation"
3847 :     passes (for profiling and backtracing) into their own library.
3848 :     The difficulty was to do it in such a way that it does not depend
3849 :     on elaborate.cm but only on elabdata.cm.
3850 :    
3851 :     Therefore there have been further changes to both elaborate.cm and
3852 :     elabdata.cm -- more "generic" things have been moved from the former
3853 :     to the latter. As a result, I was forced to split the assignment
3854 :     of numbers indicating "primtyc"s into two portions: SML-generic and
3855 :     SML/NJ-specific. Since it would have been awkward to maintain,
3856 :     I bit the bullet and actually _changed_ the mapping between these
3857 :     numbers and primtycs. The bottom line of this is that you need
3858 :     a new set of bin- and bootfiles.
3859 :    
3860 :     I have built new bootfiles for all architectures, so doing a fresh
3861 :     checkout and config/install.sh should be all you need.
3862 :    
3863 :     The newly created library's name is
3864 :    
3865 :     $smlnj/viscomp/debugprof.cm
3866 :    
3867 :     and its sources live under
3868 :    
3869 :     src/compiler/DebugProf
3870 :    
3871 :     ----------------------------------------------------------------------
3872 :     Name: Matthias Blume
3873 : blume 902 Date: 2001/08/15 17:15:00 EDT
3874 :     Tag: blume-20010815-compreorg
3875 :     Description:
3876 :    
3877 :     This is a first cut at reorganizing the CM libraries that make up the
3878 :     core of the compiler. The idea is to separate out pieces that could
3879 :     be used independently by tools, e.g., the parser, the typechecker, etc.
3880 :    
3881 :     The current status is a step in this direction, but it is not quite
3882 :     satisfactory yet. Expect more changes in the future.
3883 :    
3884 :     Here is the current (new) organization...
3885 :    
3886 :     What used to be $smlnj/viscomp/core.cm is now divided into
3887 :     six CM libraries:
3888 :    
3889 :     $smlnj/viscomp/basics.cm
3890 :     /parser.cm
3891 :     /elabdata.cm
3892 :     /elaborate.cm
3893 :     /execute.cm
3894 :     /core.cm
3895 :    
3896 :     The CM files for these libraries live under src/system/smlnj/viscomp.
3897 :     All these libraries are proxy libraries that contain precisely
3898 :     one CM library component. Here are the locations of the components
3899 :     (all within the src/compiler tree):
3900 :    
3901 :     Basics/basics.cm
3902 :     Parse/parser.cm
3903 :     ElabData/elabdata.cm
3904 :     Elaborator/elaborate.cm
3905 :     Execution/execute.cm
3906 :     core.cm
3907 :    
3908 :     [This organization is the same that has been used already
3909 :     for a while for the architecture-specific parts of the visible
3910 :     compiler and for the old version of core.cm.]
3911 :    
3912 :     As you will notice, many source files have been moved from their
3913 :     respective original locations to a new home in one of the above
3914 :     subtrees.
3915 :    
3916 :     The division of labor between the new libraries is the following:
3917 :    
3918 :     basics.cm:
3919 :     - Simple, basic definitions that pertain to many (or all) of
3920 :     the other libraries.
3921 :     parser.cm:
3922 :     - The SML parser, producing output of type Ast.dec.
3923 :     - The type family for Ast is also defined and exported here.
3924 :     elabdata.cm:
3925 :     - The datatypes that describe input and output of the elaborator.
3926 :     This includes types, absyn, and static environments.
3927 :     elaborator.cm:
3928 :     - The SML/NJ type checker and elaborator.
3929 :     This maps an Ast.dec (with a given static environment) to
3930 :     an Absyn.dec (with a new static environment).
3931 :     - This libraries implements certain modules that used to be
3932 :     structures as functors (to remove dependencies on FLINT).
3933 :     execute.cm:
3934 :     - Everything having to do with executing binary code objects.
3935 :     - Dynamic environments.
3936 :     core.cm:
3937 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
3938 :     - Top-level modules.
3939 :     - FLINT (this should eventually become its own library)
3940 :    
3941 :     Notes:
3942 :    
3943 :     I am not 100% happy with the way I separated the elaborator (and its
3944 :     data structures) from FLINT. Two instances of the same problem:
3945 :    
3946 :     1. Data structures contain certain fields that carry FLINT-specific
3947 :     information. I hacked around this using exn and the property list
3948 :     module from smlnj-lib. But the fact that there are middle-end
3949 :     specific fields around at all is a bit annoying.
3950 :    
3951 :     2. The elaborator calculates certain FLINT-related information. I tried
3952 :     to make this as abstract as I could using functorization, but, again,
3953 :     the fact that the elaborator has to perform calculations on behalf
3954 :     of the middle-end at all is not nice.
3955 :    
3956 :     3. Having to used exn and property lists is unfortunate because it
3957 :     weakens type checking. The other alternative (parameterizing
3958 :     nearly *everything*) is not appealing, though.
3959 :    
3960 :     I removed the "rebinding =" warning hack because due to the new organization
3961 :     it was awkward to maintain it. As a result, the compiler now issues some of
3962 :     these warnings when compiling init.cmi during bootstrap compilation. On
3963 :     the plus side, you also get a warning when you do, for example:
3964 :     val op = = Int32.+
3965 :     which was not the case up to now.
3966 :    
3967 :     I placed "assign" and "deref" into the _Core structure so that the
3968 :     code that deals with the "lazy" keyword can find them there. This
3969 :     removes the need for having access to the primitive environment
3970 :     during elaboration.
3971 :    
3972 :     ----------------------------------------------------------------------
3973 :     Name: Matthias Blume
3974 : blume 898 Date: 2001/08/13
3975 :     Tag: blume-20010813-closures
3976 :     Description:
3977 :    
3978 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
3979 :     performance of certain loops by avoiding needless closure allocation.
3980 :    
3981 :     ----------------------------------------------------------------------
3982 : george 890 Name: Lal George
3983 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
3984 :     Tag: george-20010731-x86-fmalloc
3985 :     Description: Fixed bug in x86 calls
3986 :    
3987 :     There was a bug where call instructions would mysteriously
3988 :     vanish. The call instruction had to be one that returned
3989 :     a floating point value.
3990 :    
3991 :     ----------------------------------------------------------------------
3992 :     Name: Lal George
3993 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
3994 :     Tag: george-20010719-simple-cells
3995 :     Description:
3996 :    
3997 :     I have dramatically simplified the interface for CELLS in MLRISC.
3998 :    
3999 :     In summary, the cells interface is broken up into three parts:
4000 :    
4001 :     1. CellsBasis : CELLS_BASIS
4002 :    
4003 :     CellsBasis is a top level structure and common for all
4004 :     architectures. it contains the definitions of basic datatypes
4005 :     and utility functions over these types.
4006 :    
4007 :     2. functor Cells() : CELLS
4008 :    
4009 :     Cells generates an interface for CELLS that incorporates the
4010 :     specific resources on the target architecture, such as the
4011 :     presence of special register classes, their number and size,
4012 :     and various useful substructures.
4013 :    
4014 :     3. <ARCH>CELLS
4015 :    
4016 :     e.g. SparcCells: SPARCCELLS
4017 :    
4018 :     <ARCH>CELLS usually contains additional bindings for special
4019 :     registers on the architecture, such as:
4020 :    
4021 :     val r0 : cell (* register zero *)
4022 :     val y : cell (* Y register *)
4023 :     val psr : cell (* processor status register *)
4024 :     ...
4025 :    
4026 :     The structure returned by applying the Cells functor is opened
4027 :     in this interface.
4028 :    
4029 :     The main implication of all this is that the datatypes for cells is
4030 :     split between CellsBasis and CELLS -- a fairly simple change for user
4031 :     code.
4032 :    
4033 :     In the old scheme the CELLS interface had a definitional binding of
4034 :     the form:
4035 :    
4036 :     signature CELLS = sig
4037 :    
4038 :     structure CellsBasis = CellsBasis
4039 :    
4040 :     ...
4041 :    
4042 :     end
4043 :    
4044 :     With all the sharing constraints that goes on in MLRISC, this old
4045 :     design quickly leads to errors such as:
4046 :    
4047 :     "structure definition spec inside of sharing ... "
4048 :    
4049 :    
4050 :     and appears to require an unacceptable amount of sharing and where
4051 :     constraint hackery.
4052 :    
4053 :     I think this error message (the interaction of definitional specs and
4054 :     sharing) requires more explanation on our web page.
4055 :    
4056 :     ----------------------------------------------------------------------
4057 : blume 826 Name: Matthias Blume
4058 : blume 879 Date: 2001/07/19 15:00:00 EDT
4059 :     Tag: blume-20010719-libreorg
4060 :     Description:
4061 :    
4062 :     This update puts together a fairly extensive but straightforward change
4063 :     to the way the libraries that implement the interactive system are
4064 :     organized:
4065 :    
4066 :     The biggest change is the elimination of structure Compiler. As a
4067 :     replacement for this structure, there is now a CM library
4068 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
4069 :     that exports all the substructures of the original structure Compiler
4070 :     directly. So instead of saying Compiler.Foo.bar one now simply
4071 :     says Foo.bar. (The CM libraries actually export a collection of
4072 :     structures that is richer than the collection of substructures of
4073 :     structure Compiler.)
4074 :    
4075 :     To make the transition smooth, there is a separate library called
4076 :     $smlnj/compiler/compiler.cm which puts together and exports the
4077 :     original structure Compiler (or at least something very close to it).
4078 :    
4079 :     There are five members of the original structure Compiler
4080 :     that are not exported directly but which instead became members
4081 :     of a new structure Backend (described by signature BACKEND). These are:
4082 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
4083 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
4084 :     architecture (: string).
4085 :    
4086 :     Structure Compiler.Version has become structure CompilerVersion.
4087 :    
4088 :     Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
4089 :     by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
4090 :     or x86, respectively.
4091 :     Each of these exports the same frontend structures that
4092 :     $smlnj/compiler.cm exports. But they do not have a structure Backend
4093 :     and instead export some structure <Arch>Backend where <Arch> is Alpha32,
4094 :     Hppa, PPC, Sparc, or X86, respectively.
4095 :    
4096 :     Library $smlnj/compiler/all.cm exports the union of the exports of
4097 :     $smlnj/compiler/<arch>.cm
4098 :    
4099 :     There are no structures <Arch>Compiler anymore, use
4100 :     $smlnj/compiler/<arch>.cm instead.
4101 :    
4102 :     Library host-compiler-0.cm is gone. Instead, the internal library
4103 :     that instantiates CM is now called cm0.cm. Selection of the host
4104 :     compiler (backend) is no longer done here but. (Responsibility for it
4105 :     now lies with $smlnj/compiler/current.cm. This seems to be more
4106 :     logical.)
4107 :    
4108 :     Many individual files have been moved or renamed. Some files have
4109 :     been split into multiple files, and some "dead" files have been deleted.
4110 :    
4111 :     Aside from these changes to library organization, there are also changes
4112 :     to the way the code itself is organized:
4113 :    
4114 :     Structure Binfile has been re-implemented in such a way that it no
4115 :     longer needs any knowledge of the compiler. It exclusively deals
4116 :     with the details of binfile layout. It no longer invokes the
4117 :     compiler (for the purpose of creating new prospective binfile
4118 :     content), and it no longer has any knowledge of how to interpret
4119 :     pickles.
4120 :    
4121 :     Structure Compile (: COMPILE) has been stripped down to the bare
4122 :     essentials of compilation. It no longer deals with linking/execution.
4123 :     The interface has been cleaned up considerably.
4124 :    
4125 :     Utility routines for dealing with linking and execution have been
4126 :     moved into their own substructures.
4127 :    
4128 :     (The ultimate goal of these changes is to provide a light-weight
4129 :     binfile loader/linker (at least for, e.g., stable libraries) that
4130 :     does not require CM or the compiler to be present.)
4131 :    
4132 :     CM documentation has been updated to reflect the changes to library
4133 :     organization.
4134 :    
4135 :     ----------------------------------------------------------------------
4136 :     Name: Matthias Blume
4137 : blume 875 Date: 2001/07/10 17:30:00 EDT
4138 :     Tag: Release_110_34
4139 :     Description:
4140 :    
4141 : blume 876 Minor tweak to 110.34 (re-tagged):
4142 :    
4143 :     - README.html file added to CVS repository
4144 :     - runtime compiles properly under FreeBSD 3.X and 4.X
4145 :    
4146 :     ----------------------------------------------------------------------
4147 :     Name: Matthias Blume
4148 :     Date: 2001/07/10 17:30:00 EDT
4149 :     Tag: Release_110_34
4150 :     Description:
4151 :    
4152 : blume 875 New version number (110.34). New bootfiles.
4153 :    
4154 :     ----------------------------------------------------------------------
4155 :     Name: Matthias Blume
4156 : blume 874 Date: 2001/07/09 16:00:00 EDT
4157 :     Tag: blume-20010709-more-varargs
4158 :     Description:
4159 :    
4160 :     I changed the handling of varargs in ml-nlffigen again:
4161 :     The ellipsis ... will now simply be ignored (with an accompanying warning).
4162 :    
4163 :     The immediate effect is that you can actually call a varargs function
4164 :     from ML -- but you can't actually supply any arguments beyond the ones
4165 :     specified explicitly. (For example, you can call printf with its format
4166 :     string, but you cannot pass additional arguments.)
4167 :    
4168 :     This behavior is only marginally more useful than the one before, but
4169 :     it has the advantage that a function or, more importantly, a function
4170 :     type never gets dropped on the floor, thus avoiding follow-up problems with
4171 :     other types that refer to the offending one.
4172 :    
4173 :     ----------------------------------------------------------------------
4174 :     Name: Matthias Blume
4175 : blume 873 Date: 2001/07/09 11:25:00 EDT
4176 :     Tag: blume-20010709-varargs
4177 :     Description:
4178 :    
4179 :     1. ckit-lib.cm now exports structure Error
4180 :     2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
4181 :     with a warning accompanied by a source location. Moreover, it
4182 :     merely skips the offending function or type and proceeds with the
4183 :     rest of its work.u As a result, one can safely feed C code containing
4184 :     "..." to ml-nlffigen.
4185 :     3. There are some internal improvements to CM, providing slightly
4186 :     more general string substitutions in the tools subsystem.
4187 :    
4188 :     ----------------------------------------------------------------------
4189 :     Name: Matthias Blume
4190 : blume 854 Date: 2001/06/27 15:10:00 EDT
4191 :     Tag: blume-20010627-concur
4192 :     Description:
4193 :    
4194 :     Fixed a small bug in CM's handling of parallel compilation.
4195 :     (You could observe the bug by Control-C-interrupting an ordinary
4196 :     CMB.make or CM.stabilize and then attaching some compile servers.
4197 :     The result was that all of a sudden the previously interrupted
4198 :     compilation would continue on its own. This was because of
4199 :     an over-optimization: CM did not bother to clean out certain queues
4200 :     when no servers were attached "anyway", resulting in the contents
4201 :     of these queues to grab control when new servers did get attached.)
4202 :    
4203 :     There is also another minor update to the CM manual.
4204 :    
4205 :     ----------------------------------------------------------------------
4206 :     Name: Matthias Blume
4207 : blume 853 Date: 2001/06/26 16:15:00 EDT
4208 :     Tag: blume-20010626-cmdoc
4209 :     Description:
4210 :    
4211 :     Minor typo fixed in CM manual (syntax diagram for libraries).
4212 :    
4213 :     ----------------------------------------------------------------------
4214 :     Name: Matthias Blume
4215 : blume 852 Date: 2001/06/25 22:55:00 EDT
4216 :     Tag: blume-20010625-x86pc
4217 :     Description:
4218 :    
4219 :     Fixed a nasty bug in the X86 assembly code that caused signal
4220 :     handlers to fail (crash) randomly.
4221 :    
4222 :     ----------------------------------------------------------------------
4223 :     Name: Matthias Blume
4224 : blume 846 Date: 2001/06/25 12:05:00 EDT
4225 :     Tag: blume-20010625-nlffigen
4226 :     Description:
4227 :    
4228 :     This update fixes a number of minor bugs in ml-nlffigen as reported by
4229 :     Nick Carter <nbc@andrew.cmu.edu>.
4230 :    
4231 :     1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
4232 :     2. Default names for generated files are now derived from the name of
4233 :     the C file *without its directory*. In particular, this causes generated
4234 :     files to be placed locally even if the C file is in some system directory.
4235 :     3. Default names for generated signatures and structures are also derived
4236 :     from the C file name without its directory. This avoids silly things
4237 :     like "structure GL/GL".
4238 :     (Other silly names are still possible because ml-nlffigen does not do
4239 : blume 847 a thorough check of whether generated names are legal ML identifiers.
4240 :     When in doubt, use command line arguments to force particular names.)
4241 : blume 846
4242 :     ----------------------------------------------------------------------
4243 :     Name: Matthias Blume
4244 : blume 845 Date: 2001/06/21 12:25:00 EDT
4245 :     Tag: blume-20010621-eXene
4246 :     Description:
4247 :    
4248 :     eXene now compiles and (sort of) works again.
4249 :    
4250 :     The library name (for version > 110.33) is $/eXene.cm.
4251 :    
4252 :     I also added an new example in src/eXene/examples/nbody. See the
4253 :     README file there for details.
4254 :    
4255 :     ----------------------------------------------------------------------
4256 :     Name: Matthias Blume
4257 : blume 844 Date: 2001/06/20 16:40:00 EDT
4258 :     Tag: blume-20010620-cml
4259 :     Description:
4260 :    
4261 :     CML now compiles and works again.
4262 :    
4263 :     Libraries (for version > 110.33):
4264 :    
4265 :     $cml/cml.cm Main CML library.
4266 :     $cml/basis.cm CML's version of $/basis.cm.
4267 :     $cml/cml-internal.cm Internal helper library.
4268 :     $cml/core-cml.cm Internal helper library.
4269 :     $cml-lib/trace-cml.cm Tracing facility.
4270 :     $cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
4271 :    
4272 :     The installer (config/install.sh) has been taught how to properly
4273 :     install this stuff.
4274 :    
4275 :     ----------------------------------------------------------------------
4276 :     Name: Matthias Blume
4277 : blume 843 Date: 2001/06/19 17:55:00 EDT
4278 :     Tag: blume-20010619-instantiate
4279 :     Description:
4280 :    
4281 :     This un-breaks the fix for bug 1432.
4282 :     (The bug was originally fixed in 110.9 but I broke it again some
4283 :     time after that.)
4284 :    
4285 :     ----------------------------------------------------------------------
4286 :     Name: Matthias Blume
4287 : blume 842 Date: 2001/06/19 17:25:00 EDT
4288 :     Tag: blume-20010619-signals
4289 :     Description:
4290 :    
4291 :     This should (hopefully) fix the long-standing signal handling bug.
4292 :     (The runtime system was constructing a continuation record with an
4293 :     incorrect descriptor which would cause the GC to drop data on the floor...)
4294 :    
4295 :     ----------------------------------------------------------------------
4296 :     Name: Matthias Blume
4297 : blume 840 Date: 2001/06/15 15:05:00 EDT
4298 : blume 841 Tag: blume-20010615-moresparc
4299 :     Description:
4300 :    
4301 :     Here is a short late-hour update related to Sparc c-calls:
4302 :    
4303 :     -- made handling of double-word arguments a bit smarter
4304 :    
4305 :     -- instruction selection phase tries to collapse certain clumsily
4306 :     constructed ML-Trees; typical example:
4307 :    
4308 :     ADD(ty,ADD(_,e,LI