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

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Revision 1686 - (view) (download)
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 1686 Date: 2004/11/11 17:30:00 CST
17 :     Tag: blume-20041111-more64
18 :     Description:
19 :    
20 :     All the pieces of Word64 are now there, with the exception of the
21 :     conversions from and to LargeWord. (Eventually these need to be identities,
22 :     but for the time being they don't even make sense because LargeWord is
23 :     32-bit wide.)
24 :    
25 :     Also started to add similar support for Int64, but major pieces of that
26 :     are still missing.
27 :    
28 :     ----------------------------------------------------------------------
29 : mblume 1668 Name: Matthias Blume (blume (at) tti - c (dot) org)
30 : mblume 1684 Date: 2004/11/11 00:15:00 CST
31 :     Tag: blume-20041111-word64
32 :     Description:
33 :    
34 :     Structure Word64 is now (almost) complete, word literals and patterns
35 :     seem to work. There are a few odd pieces missing. In particular,
36 :     I didn't do the {from,to}LargeWord parts because LargeWord is still Word32
37 :     at the moment.
38 :    
39 :     Making Word64 official would mean that LargeWord becomes Word64. But
40 :     this requires extreme care because most word-word conversions have to
41 :     go through LargeWord, so making a mistake means loss of efficiency or
42 :     worse. Eventually there will be a solution similar to (but actually
43 :     simpler than) what I did with IntInf.
44 :    
45 :     ----------------------------------------------------------------------
46 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
47 : mblume 1683 Date: 2004/11/10 18:12:00 CST
48 :     Tag: blume-20041110-64bit
49 :     Description:
50 :    
51 :     More 64-bit hacking (but still not even half-way there yet).
52 :     Also, some assorted improvements to the handling of 8-bit words.
53 :    
54 :     ----------------------------------------------------------------------
55 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
56 : mblume 1682 Date: 2004/11/09 17:50:00 CST
57 : mblume 1683 Tag: <none>
58 : mblume 1682 Description:
59 :    
60 :     Started adding some infrastructure for supporting 64-bit int- and
61 :     word-types. (Still in its very early stages.)
62 :    
63 :     ----------------------------------------------------------------------
64 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
65 : mblume 1672 Date: 2004/10/28 10:45:00 CDT
66 :     Tag: Release_110_50
67 :     Description:
68 :    
69 :     New working version (110.50). NEW BOOTFILES!
70 :    
71 :     =====================
72 :    
73 :     Also:
74 :    
75 :     - Changend config/srcarchiveurl from a file just
76 :     containing the URL string into a file containing
77 :     shell script code. The code has access to the $VERSION variable.
78 :     - Made corresponding changes to config/install.sh and config/unpack.
79 :     - Default contents of config/srcarchiveurl uses $VERSION and
80 :     normally does not have to be edited to reflect a version change.
81 :    
82 :     (As a result, a version change can be done by just editing
83 :     config/version, the rest is now automatic.)
84 :    
85 :     ----------------------------------------------------------------------
86 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
87 : mblume 1669 Date: 2004/10/27 17:50:00 CDT
88 :     Tag: blume-20041027-btrace-msg
89 :     Description:
90 :    
91 :     BackTrace.monitor now also reports the source of the exception that
92 :     triggered the trace.
93 :    
94 :     ----------------------------------------------------------------------
95 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
96 : mblume 1668 Date: 2004/10/27 17:20:00 CDT
97 :     Tag: blume-20041027-x86-c-calls
98 :     Description:
99 :    
100 :     This is the HISTORY entry for two earlier commits, both concerning
101 :     the x86 c-calls code in MLRISC:
102 :    
103 :     - added a missing LOAD in the code that deals with struct arguments
104 :     - made sure the caller does not add the wrong number of bytes to the
105 :     stack pointer after a call of a function returning a struct
106 :     (the callee already pops the implicit argument which points to
107 :     the space reserved for the result)
108 :    
109 :     ----------------------------------------------------------------------
110 : allenleung 1662 Name: Allen Leung (leunga (at) reservoir (dot) com)
111 :     Date: 2004/10/24 14:00:00 EST
112 :     Tag: leunga-20041024-x86-gas-fucomip
113 :     Description:
114 :    
115 :     John discovered a bug in the syntax of fucomip.
116 :     The opcodes FU?COMIP? have been changed to
117 :    
118 :     fu?comip? %st(i), %st
119 :    
120 :     ----------------------------------------------------------------------
121 : mblume 1622 Name: Matthias Blume (blume (at) tti - c (dot) org)
122 : mblume 1656 Date: 2004/10/20 15:06:00 CDT
123 :     Tag: blume-20041020-standalone-backtrace
124 :     Description:
125 :    
126 :     Added a mechanism for getting back-trace information from standalone
127 :     programs. Here is how it works:
128 :    
129 :     1. The part of the program from which you want to get backtrace
130 :     information (usually the whole program) should be wrapped with
131 :     BackTrace.monitor. This is a (unit->'a)->'a function, and your
132 :     main program could be modified from something like
133 :    
134 :     fun main (pgm, args) = ...
135 :    
136 :     to
137 :    
138 :     fun main (pgm, args) = BackTrace.monitor (fn () => ...)
139 :    
140 :     2. To be able to access BackTrace.monitor, you have to add
141 :     library $smlnj-tdp/plugins.cm to the .cm file that contains your
142 :     main function.
143 :    
144 :     3. Remove all compiled code (i.e., all the .cm/ subdirectories that
145 :     CM might have created in the past for your project).
146 :    
147 :     4. Build the system using this command line:
148 :    
149 :     ml-build -Ctdp.instrument=true \$smlnj-tdp/back-trace.cm \
150 :     myprog.cm MyProg.main myprog
151 :    
152 :     instead of the usual
153 :    
154 :     ml-build myprog.cm MyProg.main myprog
155 :    
156 :     I changed a library name:
157 :    
158 :     $/trace-debug-profile.cm --> $smlnj-tdp/plugins.cm
159 :    
160 :     New libraries:
161 :    
162 :     $smlnj-tdp/back-trace.cm
163 :     -- when loaded causes the back-trace plugin to be installed
164 :     $smlnj-tdp/coverage.cm
165 :     -- when loaded causes the coverage plugin to be installed
166 :    
167 :     ----------------------------------------------------------------------
168 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
169 : mblume 1655 Date: 2004/10/18 16:45:00 CDT
170 :     Tag: blume-20041018-groupowner
171 :     Description:
172 :    
173 :     Added an "obsolete" warning for the "group owner" syntax to CM's parser.
174 :    
175 :     Eliminated group owner specs from .cm files throughout the source tree.
176 :    
177 :     ----------------------------------------------------------------------
178 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
179 : mblume 1653 Date: 2004/10/15 15:45:00 CDT
180 :     Tag: blume-20041015-coverage
181 :     Description:
182 :    
183 :     * Test coverage tool added!
184 :     * Further reorganization of tracing-, debugging-, and profiling support:
185 :    
186 :     - moved original BTImp -- now called BackTrace -- into a separate
187 :     library called $/trace-debug-profile.cm
188 :     - eliminated all mentions of BTrace from SMLofNJ.Internals
189 :     - only the instrumentation mechanism is now left in the compiler proper
190 :     - BackTrace module is a plugin which is NOT plugged in by default
191 :     - Coverage module is another such plugin
192 :    
193 :     To get the benefits of any of these plugin modules, the code in
194 :     question must be compiled with tdp instrumentation turned on. This
195 :     can be done by setting SMLofNJ.Internals.TDP.mode to true.
196 :     (The ref cell is also controlled via the -Ctdp.instrument=... switch.)
197 :    
198 :     Plugins are selected at link time. (Pre-compiled instrumented code
199 :     can be re-loaded with different plugins in effect.) When an
200 :     instrumented module is linked, whatever plugins are at that time
201 :     enabled will come into effect for that module.
202 :    
203 :     To enable the back-trace plugin, load library $/trace-debug-profile.cm
204 :     and invoke BackTrace.install() (e.g., from the interactive prompt).
205 :     To enable the coverage plugin, load the same library and invoke
206 :     Coverage.install().
207 :    
208 :     Back-traces are generated automatically on uncaught exceptions and
209 :     when the code in question explicitly invokes BackTrace.trigger().
210 :    
211 :     Coverage (and execution frequency-) information must be queried
212 :     explicitly by calling Coverage.not_covered and Coverage.hot_spots.
213 :    
214 :     ----------------------------------------------------------------------
215 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
216 : mblume 1652 Date: 2004/10/14 17:40:00 CDT
217 :     Tag: blume-20041014-tdp-core
218 :     Description:
219 :    
220 :     Snapshot of a significant overhaul of how the trace/debug/profile support
221 :     is hooked into the system (specifically: Core and SMLofNJ.Internals).
222 :    
223 :     ----------------------------------------------------------------------
224 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
225 : mblume 1650 Date: 2004/10/13 16:34:00 CDT
226 :     Tag: blume-20041013-tdp
227 :     Description:
228 :    
229 :     Some rationalization of names:
230 :    
231 :     structure BTrace -> structure TDPInstrument
232 :     etc.
233 :    
234 :     This is is preparation of using the original back-trace
235 :     instrumentation for other purposes. "TDP" stands for
236 :     Trace/Debug/Profile.
237 :    
238 :     The control flag controlling whether instrumentation is on or off is now
239 :     registered under a different name, so instead of running sml as
240 :    
241 :     sml -Cinstrument.btrace-mode=true
242 :    
243 :     one has to say
244 :    
245 :     sml -Ctdp.instrument=true
246 :    
247 :     ----------------------------------------------------------------------
248 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
249 : mblume 1645 Date: 2004/10/11 16:37:00 CDT
250 :     Tag: blume-20041011-regions
251 :     Description:
252 :    
253 :     Made some minor modifications to elabcore.sml to have source regions
254 :     be propagated more tightly -- resulting in better (i.e., smaller)
255 :     regions being reported in error- and debug messages.
256 :    
257 :     ----------------------------------------------------------------------
258 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
259 : mblume 1644 Date: 2004/10/08 22:50:00 CDT
260 :     Tag: blume-20041008-cmkw
261 :     Description:
262 :    
263 :     Fixed handling of keywords in .cm files: After seeing "is" the lexer
264 :     treats subsequent occurrences of "group", "library", "source", "is",
265 :     "*", and "-" as ordinary identifiers rather than keywords.
266 :    
267 :     Most seriously, this fixes a problem with CM's "shell" tool. The tool
268 :     is supposed to accept a tool argument called "source", but this did
269 :     not work because of the clash with the keyword.
270 :    
271 :     ----------------------------------------------------------------------
272 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
273 : mblume 1642 Date: 2004/10/07 16:00:00 CDT
274 :     Tag: blume-20041007-cleanup
275 :     Description:
276 :    
277 :     Assorted cleanup work:
278 :    
279 :     - got rid of intstrmap in favor of using the library's
280 :     hash table implementation
281 :     - threw out most of the pathnames stuff, as it was not used anyway
282 :     - simplified tokentable implementation
283 :     - fixed some minor spelling errors
284 :    
285 :     ----------------------------------------------------------------------
286 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
287 : mblume 1641 Date: 2004/10/06 15:15:15 CDT
288 :     Tag: blume-20041006-handler
289 :     Description:
290 :    
291 :     Cleaned up the absyn to reflect the invariant that HANDLE always
292 :     carries a FNexp as part of the type definition. This eliminates some
293 :     superfluous sanity checks at runtime down the road.
294 :    
295 :     Some minor cleanup of the btrace code.
296 :    
297 :     ----------------------------------------------------------------------
298 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
299 : mblume 1640 Date: 2004/10/01 10:20:30 CDT
300 :     Tag: blume-20041001-slave
301 :     Description:
302 :    
303 :     Added hack to make slave mode work in the presence of the version
304 :     tool. (Still, since the master does two passes over the code for
305 :     CMB.make, the release number gets bumped twice when slaves are
306 :     attached. I don't know if this is worth fixing...)
307 :    
308 :     ----------------------------------------------------------------------
309 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
310 : mblume 1639 Date: 2004/09/30 10:55:00 CDT
311 :     Tag: blume-20040930-version
312 :     Description:
313 :    
314 :     * Moved the "version" magic into its own little library under
315 : mblume 1672 src/system/smlnj/internal. This avoids expensive reconstruction of
316 :     a stable src/compiler/core.cm.
317 : mblume 1639
318 : mblume 1672 * At the same time, structure CompilerVersion is now known as
319 :     structure SMLNJVersion.
320 : mblume 1639
321 :     * Arranged for the version tool to NOT kick in when rebuilding the system
322 :     (makeml -rebuild, fixpt). Otherwise one would never reach a fixpoint.
323 :     Also, loading the versiontool does not work when rebuilding the system
324 :     because CM is not properly initialized at that time.
325 :    
326 :     ----------------------------------------------------------------------
327 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
328 : mblume 1638 Date: 2004/09/29 14:00:00 CDT
329 :     Tag: blume-20040929-autoversion
330 :     Description:
331 :    
332 :     Implemented some CM magic to have
333 :     file src/compiler/TopLevel/main/version.sml
334 :     generated automagically.
335 :     The version is taken from two files: config/version and config/release.
336 :     The first is expected to contain a two-part version number such as 110.49.
337 :     The second should contain a single number, but it may be missing.
338 :    
339 :     If the environment variable VERSIONTOOL_BUMP_RELEASE is defined at the
340 :     time the version tool is loaded (which is the first time you say CMB.make),
341 :     then the tool will increment the value stored in config/release every
342 :     time CMB.make is invoked.
343 :    
344 :     The binfile format is now insensitive to anything beyond the first
345 :     two components of a version number, so bumping the release does not render
346 :     binfiles incompatible. Auto-bumping can be used to keep track of versions
347 :     during development without invalidating existing binfiles.
348 :    
349 :     In any case, every CMB.make updates the date information in version.sml.
350 :     (This is the date that is printed in the banner.)
351 :    
352 :     ----------------------------------------------------------------------
353 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
354 : mblume 1634 Date: 2004/09/28 10:53:00 CDT
355 :     Tag: blume-20040928-controls
356 :     Description:
357 :    
358 :     Some cleanup of the controls code.
359 :    
360 :     ----------------------------------------------------------------------
361 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
362 : mblume 1633 Date: 2004/09/27 22:08:00 CDT
363 :     Tag: blume-20040927-controls
364 :     Description:
365 :    
366 :     Added two pieces of functionality to the Controls interface:
367 :    
368 :     1. val save'restore: 'a control -> unit -> unit
369 :    
370 :     grabs the current value of the control in stage 1 and restores it
371 :     in stage 2.
372 :    
373 :     2. val set' : 'a control * 'a -> unit -> unit
374 :    
375 :     stores the given value into the control in stage 2 (i.e., delayed)
376 :     but does all error checking in stage 1.
377 :     (This is for string controls that need to do parse their argument --
378 :     something that might fail. In some cases, notably in CM, one
379 :     already knows the intended argument but wants to delay the actual
380 :     assignment until a time when error recovery would be more difficult.)
381 :    
382 :     Changed the handling of controls in tool arguments to classes "sml" and
383 :     "lazysml":
384 :     - use Controls.save'restore as a more robust way of restoring the
385 :     old value (in particular: without having to re-parse the string)
386 :     - use controls to handle the "overload" keyword in the init group
387 :     (I believe this change actually fixes a long-standing obscure bug.)
388 :    
389 :     ----------------------------------------------------------------------
390 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
391 : mblume 1632 Date: 2004/09/27 17:00:00 CDT
392 :     Tag: blume-20040927-lazysml
393 :     Description:
394 :    
395 :     Added a new tool class called "lazysml" to CM's tool chest. The only
396 :     difference to "sml" is that compilation is done with Control.lazysml
397 :     set to true. A source of class "lazysml" is automatically recognized
398 :     by a file name suffix of ".lml".
399 :    
400 :     In addition to the above feature, the original class "sml" now also
401 :     supports a tool argument "lazy" which has the same effect. As a
402 :     result, the following three lines are equivalent:
403 :    
404 :     foo.sml : lazysml
405 :     foo.sml : sml (lazy)
406 :     foo.sml (lazy)
407 :    
408 :     The setting goes into effect both during parsing and during
409 :     compilation. The original setting is restored right after parsing and
410 :     after compilation, respectively.
411 :    
412 :     In addition to all the above, there is also a general mechanism to set
413 :     ANY of the "controls" that are available at the command line via
414 :     "-C..." on a per-sml-file basis. The same rules that apply for "lazy"
415 :     apply as well. (In fact, "lazy" is implemented as a special case of
416 :     the general mechanism.)
417 :    
418 :     The .cm file syntax uses a new keyword tool argument called "with".
419 :     There are several ways of indicating the desired settings:
420 :    
421 :     foo.sml (with:parser.quotations=true)
422 :     foo.sml (with:(name:parser.quotations value:true))
423 :     foo.sml (with:(name:name1 value:value1 name:name2 value:value2 ...))
424 :     foo.sml (with:(name1=value1 name2=value2 ...))
425 :     foo.sml (with:(name1=value1 name:name2 value:value2 name3=value3 ...))
426 :    
427 :     etc.
428 :    
429 :     Another possible abbreviation is to leave out the =v or value:v part
430 :     if the name refers to a boolean control (in which case the value is
431 :     taken to be true). Thus, one could get lazy sml also by saying:
432 :    
433 :     foo.sml (with:parser.lazy-keyword=true)
434 :     foo.sml (with:parser.lazy-keyword)
435 :     foo.sml (with:(name:parser.lazy-keyword value:true))
436 :     foo.sml (with:(name:parser.lazy-keyword))
437 :    
438 :     ----------------------------------------------------------------------
439 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
440 : mblume 1631 Date: 2004/09/24 16:22:00 CDT
441 :     Tag: blume-20040924-ppc-long-branch
442 :     Description:
443 :    
444 :     Turned message about "emiting long form of branch" off by default.
445 :     Added a control flag to turn it back on when desired.
446 :    
447 :     ----------------------------------------------------------------------
448 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
449 : mblume 1630 Date: 2004/09/24 16:05:00 CDT
450 :     Tag: blume-20040924-rounding
451 :     Description:
452 :    
453 :     Applied patch for setting rounding modes under Mac OS X. Thanks to
454 :     Melissa O'Neill for providing the code!
455 :    
456 :     ----------------------------------------------------------------------
457 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
458 : mblume 1629 Date: 2004/09/23 17:30:00 CDT
459 :     Tag: blume-20040923-envvars
460 :     Description:
461 :    
462 :     1. Changed definition of type ControlRegistry.registry_tree to
463 :     include control_info (i.e., the name of the controlling environment
464 :     variable).
465 :    
466 :     2. Added command-line flags -e and -E to print the names of environment
467 :     variables that can be used to control internal settings.
468 :     (This uses the new API mentioned in 1.)
469 :    
470 :     ----------------------------------------------------------------------
471 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
472 : mblume 1622 Date: 2004/09/13 16:50:00 CDT
473 :     Tag: Release_110_49
474 :     Description:
475 :    
476 :     New working version (110.49). NEW BOOTFILES!
477 :    
478 :     ----------------------------------------------------------------------
479 : mblume 1621 Name: Matthias Blume
480 :     Date: 2004/09/13 16:20:00 CDT
481 :     Tag: blume-20040913-config-mlrisc
482 :     Description:
483 :    
484 :     Put target "mlrisc" back into the default list.
485 :     (There is no harm in having it, and some users have expressed their
486 :     wish to have "mlrisc" included by default.)
487 :    
488 :     ----------------------------------------------------------------------
489 : jhr 1620 Name: John Reppy
490 :     Date: 2004/09/13
491 :     Tag: jhr-20040913-signals
492 :     Description:
493 :    
494 :     Fixed the signal masking code to properly nest mask/unmask operations
495 :     on a per-signal basis.
496 :    
497 :     ----------------------------------------------------------------------
498 : mblume 1619 Name: Matthias Blume (blume (at) tti - c (dot) org)
499 :     Date: 2004/09/08 13:20:00 CDT
500 :     Tag: blume-20040908-heap-magic
501 :     Description:
502 :    
503 :     Bumped the heap macig number to 0x09082004 to account for the changed
504 :     layout of the ML frame under MacOS X.
505 :    
506 :     ----------------------------------------------------------------------
507 : allenleung 1618 Name: Allen Leung (leunga (at) reservoir (dot) com)
508 :     Date: 2004/09/03 11:26:00 EST
509 :     Tag: leunga-20040903-cygwin-install
510 :     Description:
511 :    
512 :     Added a patch to _arch-n-opsys to enable the Cygwin runtime.
513 :     The Cygwin runtime is turned on by setting the environment
514 :     variable SMLNJ_CYGWIN_RUNTIME to 1.
515 :    
516 :     ----------------------------------------------------------------------
517 : mblume 1615 Name: Matthias Blume (blume (at) tti - c (dot) org)
518 : mblume 1617 Date: 2004/08/31 17:15:00 CDT
519 :     Tag: blume-20040831-core
520 :     Description:
521 :    
522 :     Added some exports to src/compiler/core.cm upon request by J. Joemann.
523 :    
524 :     ----------------------------------------------------------------------
525 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
526 : mblume 1616 Date: 2004/08/30 17:55:00 CDT
527 :     Tag: blume-20040830-installer
528 :     Description:
529 :    
530 :     Upon request by Johannes Joemann:
531 :    
532 :     - improved ML code of installer to fall back to coping when renaming
533 :     fails (i.e., when source and target are on different file systems);
534 :     the code compiles but has yet to be tested in anger
535 :     - removed mlrisc from list of default targets (config/targets)
536 :    
537 :     ----------------------------------------------------------------------
538 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
539 : mblume 1615 Date: 2004/08/27 17:20:00 CDT
540 :     Tag: blume-20040827-ptreql
541 :     Description:
542 :    
543 :     Added ptreql primop to structure InlineT (upon request from Larry
544 :     Paulson).
545 :    
546 :     ----------------------------------------------------------------------
547 : allenleung 1613 Name: Allen Leung (leunga (at) reservoir (dot) com)
548 : allenleung 1614 Date: 2004/08/15 21:21:00 EST
549 :     Tag: leunga-110_48-udgraph
550 :     Description:
551 :    
552 :     Another bug fix from Carl Hauser:
553 :    
554 :     diff /net/niflab/smlnj48/src/MLRISC/graphs/udgraph.sml udgraph.sml
555 :     > 48c48
556 :     > < | rmv((e as (k,_))::es,L) = rmv(es,if k = i then es else
557 :     > e::L)
558 :     > ---
559 :     > > | rmv((e as (k,_))::es,L) = rmv(es,if k = i then L else e::L)
560 :     > Without this, any deletion of an edge in an undirected graph does severe
561 :     > violence to the graph.
562 :    
563 :     ----------------------------------------------------------------------
564 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
565 : allenleung 1613 Date: 2004/08/10 23:35:00 EST
566 :     Tag: leunga-110_48-ppc
567 :     Description:
568 :    
569 :     The IBM/MacOS syntax switch on PPC was incorrectly swapped.
570 :    
571 :     ----------------------------------------------------------------------
572 : mblume 1602 Name: Matthias Blume (blume (at) tti - c (dot) org)
573 : mblume 1615 Date: 2004/08/10 12:00:00 CDT
574 : mblume 1602 Tag: Release_110_48
575 :     Description:
576 :    
577 :     New working version (110.48). NEW BOOTFILES!
578 :    
579 :     ----------------------------------------------------------------------
580 : allenleung 1599 Name: Allen Leung (leunga (at) reservoir (dot) com)
581 :     Date: 2004/08/09 12:21:00 EST
582 :     Tag: leunga-110_47-dijsktra
583 :     Description:
584 :    
585 :     Bug fix from Carl Hauser:
586 :    
587 :     single_source_shortest_paths in dijkstra.sml was observed to get wrong
588 :     answers (by comparing to single_source_shortest_paths in bellman-ford.sml).
589 :    
590 :     The problem is that following the expression A.update(dist,s,Num.zero)
591 :     it is necessary to update the priority queue using Q.decreaseWeight(Q,s).
592 :    
593 :     ----------------------------------------------------------------------
594 : mblume 1595 Name: Matthias Blume (blume (at) tti - c (dot) org)
595 :     Date: 2004/08/06 18:10:00 CDT
596 :     Tag: blume-20040806-cmdline
597 :     Description:
598 :    
599 :     Fiddled with handling of command-line options:
600 :    
601 :     * sml now quits after processing the command line
602 :     if -H, -S, -h<n>, or -s<n> appears as the last
603 :     command-line argument
604 :     * a new option -q terminates the session when encountered on
605 :     the command line; subsequent arguments will be ignored
606 :     * bug fixes: short (erroneous) arguments are no longer ignored
607 :     completely
608 :    
609 :     ----------------------------------------------------------------------
610 : allenleung 1593 Name: Allen Leung (leunga (at) reservoir (dot) com)
611 :     Date: 2004/08/04 18:17:00 EST
612 :     Tag: leunga-110_47-ppc-ibm-asm
613 :     Description:
614 :    
615 :     - Added minimal IBM assembly syntax support for PowerPC.
616 :    
617 :     - Cygwin: manually changed the file cygwin.def. Some exported symbols have
618 :     been altered in the runtime. We need an automatic way to keep the file
619 :     in sync.
620 :    
621 :     ----------------------------------------------------------------------
622 : mblume 1548 Name: Matthias Blume (blume (at) tti - c (dot) org)
623 : mblume 1581 Date: 2004/08/04 14:00:00 CDT
624 :     Tag: Release_110_47
625 :     Description:
626 :    
627 :     New working version (110.47). NEW BOOTFILES!
628 :    
629 :     ----------------------------------------------------------------------
630 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
631 : mblume 1580 Date: 2004/08/03 14:25:00 CDT
632 :     Tag: blume-20040803-callingconv
633 :     Description:
634 :    
635 :     Added low-level support for choosing C calling conventions by
636 :     twiddling the type of rawccall. (See
637 :     src/compiler/Semant/types/cproto.sml for details.)
638 :    
639 :     ----------------------------------------------------------------------
640 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
641 : mblume 1579 Date: 2004/08/02 15:55:00 CDT
642 :     Tag: blume-20040802-backout
643 :     Description:
644 :    
645 :     Backed out of change to win32-filesys.c. The earlier patch to
646 :     get_file_time caused CM to produce files with the wrong time stamp.
647 :    
648 :     ----------------------------------------------------------------------
649 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
650 : mblume 1573 Date: 2004/08/02 14:45:00 CDT
651 :     Tag: blume-20040802-nlffi-win32
652 :     Description:
653 :    
654 :     Added NLFFI support for Win32, adapted from a patch provided by David
655 :     Hansel. This is currently completely untested. Also, the issue
656 :     concerning stdcall vs. ccall is still unresolved.
657 :    
658 :     ----------------------------------------------------------------------
659 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
660 : mblume 1572 Date: 2004/07/30 17:55:00 CDT
661 :     Tag: blume-20040730-various
662 :     Description:
663 :    
664 :     Gearing up towards 110.47...
665 :    
666 :     - various minor bugfixes to ml-nlffigen
667 :     - a beginning of a manual for nlffi
668 :    
669 :     - eliminated 'export name=value' in config/install.sh as this does
670 :     not work with certain versions of /bin/sh
671 :     (Thanks to David King at Motorola for catching this.)
672 :    
673 :     - several bugfixes provided or suggested by David Hansel at Reactive Systems:
674 :     - added a test for tm==NULL to gmtime.c and localtime.c
675 :     - applied patch for incorrect GetFileTime under win32
676 :     - toSeconds -> toMilliseconds in Win32/win32-process.sml
677 :    
678 :     ----------------------------------------------------------------------
679 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
680 : mblume 1557 Date: 2004/07/21 18:20:00 CDT
681 :     Tag: blume-20040721-nlffigen
682 :     Description:
683 :    
684 :     - Fixed minor issue in ml-nlffigen: Now generate structure T_foo
685 :     for a typedef to an incomplete type, but leave out the "typ" member.
686 :     (This is just for consistency.)
687 :     - Started to produce what is supposed to become better (i.e., comprehensive)
688 :     documentation of what ml-nlffigen does and produces.
689 :    
690 :     ----------------------------------------------------------------------
691 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
692 : mblume 1548 Date: 2004/07/14 16:25:00 CDT
693 :     Tag: blume-20040714-union
694 :     Description:
695 :    
696 :     Added C_UNION to c-calls/c-types.sml and updated the machinery
697 :     (ml-nlffigen, cproto.sml) that conveys C function interface
698 :     information to the code generator.
699 :    
700 :     However, the actual architecture-specific implementation of function
701 :     arguments and results that are C unions is still not implemented.
702 :    
703 :     ----------------------------------------------------------------------
704 : allenleung 1539 Name: Allen Leung (leunga (at) reservoir (dot) com)
705 : allenleung 1546 Date: 2004/07/14 14:38:00 EST
706 :     Tag: leunga-110_46_1-ppc-lwzu
707 :     Description:
708 :    
709 :     Added these instructions to the PowerPC architecture:
710 :     LBZU(X), LHZU(X), LWZU(X),
711 :     STWU(X), STFDU, STFSU
712 :    
713 :     etc...
714 :    
715 :     Note: I haven't added their instruction encoding into the description.
716 :    
717 :     ----------------------------------------------------------------------
718 :     Name: Allen Leung (leunga (at) reservoir (dot) com)
719 : allenleung 1539 Date: 2004/07/13 15:04:00 EST
720 :     Tag: leunga-110_46_1-ppc-lwarx
721 :     Description:
722 :    
723 :     Added the two instructions LWARX and STWCX to the PowerPC
724 :     instruction set.
725 :    
726 :     A (untested) rewrite of loop-structure.sml. The old version
727 :     is completely broken.
728 :    
729 :     ----------------------------------------------------------------------
730 : mblume 1479 Name: Matthias Blume (blume (at) tti - c (dot) org)
731 : mblume 1537 Date: 2004/07/13 13:50:00 CDT
732 :     Tag: blume-20040713-nlffi
733 :     Description:
734 :    
735 :     - use paramAlloc to report c-calls with too many arguments
736 :     (for PPC version where parameter area is pre-allocated)
737 :     - added ccall_maxargspace to machspec (to implement the above)
738 :     - made "make" commend in CM's "make" tool configurable
739 :     - added option (default: on) for passing the name of the SML/NJ's "bin"
740 :     directory to "make"; the call looks like this:
741 :    
742 :     make <options> SMLNJ_BINDIR=<dir> <target>
743 :    
744 :     This can be used by the Makefile to, e.g., pick the "right" version
745 :     of ml-nlffigen.
746 :     - minor code tweaks
747 :    
748 :     ----------------------------------------------------------------------
749 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
750 : mblume 1532 Date: 2004/07/12 22:50:00 CDT
751 :     Tag: blume-110_46_1-macosx-nlffi
752 :     Description:
753 :    
754 :     NLFFI under Mac OS X now working (sort of). This is largely untested,
755 :     though.
756 :    
757 :     Note: 1. You have to make a new, clean build of the runtime system.
758 :     2. There are new BOOTFILES, you have to use them!
759 :     (Doing the bootstrap process yourself would be *very* painful!
760 :     If you absolutely have to do it, build the system under
761 :     a different architecture and then cross-compile.)
762 :    
763 :     Version bumped to 110.46.1 to account for runtime data format changes.
764 :    
765 :     ----------------------------------------------------------------------
766 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
767 : mblume 1515 Date: 2004/06/18 14:30:00 CDT
768 :     Tag: blume-20040618-unix
769 :     Description:
770 :    
771 :     Changed the implementation of structure Unix so that the same stream
772 :     is returned every time one of the {text,bin}{In,Out}streamOf functions
773 :     is invoked on the same proc. This is not what the spec currently
774 :     says -- although IMO it arguably should. (See discussion below.)
775 :    
776 :     ----------------------------------------------------------------------
777 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
778 : mblume 1507 Date: 2004/06/17 18:15:00 CDT
779 :     Tag: Release_110_46
780 :     Description:
781 :    
782 :     New working version (110.46). NEW BOOTFILES!
783 :    
784 :     ----------------------------------------------------------------------
785 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
786 : mblume 1506 Date: 2004/06/17 17:20:00 CDT
787 :     Tag: blume-20040617-timer-unix
788 :     Description:
789 :    
790 :     Changed the interface of structures Timer and Unix to match the most
791 :     recent Basis spec.
792 :    
793 :     In the case of Unix there still seems to be an open/weird issue:
794 :    
795 :     The {text,bin}{In,Out}streamOf functions are supposed to create
796 :     fresh streams whenever they are called -- as opposed to have them
797 :     return the same stream every time. This design is supposed to
798 :     prevent space leaks caused by proc values hanging on to streams.
799 :    
800 :     The reap function, on the other hand, is supposed to close the
801 :     streams. This cannot be done without having a handle on the
802 :     stream in proc after all...
803 :    
804 :     I took the liberty to implement the following stopgap solution:
805 :    
806 :     The proc value hangs on to the most recently created stream(s).
807 :     Reap closes those. If either or both of the two streams hadn't
808 :     been created at all yet, then reap will close the corresponding
809 :     file descriptors directly.
810 :    
811 :     PS: I don't understand the original space leak argument anymore. If
812 :     a proc hangs on to the imperative stream, then I/O operations on those
813 :     will advance the state of the cached stream and avoid the space leak.
814 :    
815 :     ----------------------------------------------------------------------
816 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
817 : mblume 1500 Date: 2004/05/28 16:45:00 CDT
818 :     Tag: blume-20040528-basis
819 :     Description:
820 :    
821 :     Added signature PACK_REAL and exported functor PrimIO.
822 :    
823 :     ----------------------------------------------------------------------
824 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
825 : mblume 1498 Date: 2004/05/25 16:00:00 CDT
826 :     Tag: blume-20040525-group-owner
827 :     Description:
828 :    
829 :     CM now ignores (but still accepts) the "owner" information in group
830 :     descriptions. The owner of a group is its next enclosing
831 :     library. Each group must have a unique owner. (There is a virtual
832 : mblume 1505 "toplevel" library that owns groups which are not nested within a real
833 : mblume 1498 library.) Previously, each group had to explicitly declare its owner,
834 :     and CM would check that such a declaration is correct. The new scheme
835 :     is to have CM check that for each group there is precisely one owning
836 :     library.
837 :    
838 :     The advantage of the new scheme is that the programmer no longer needs
839 :     to maintain the somewhat annoying owner information. The downside is
840 :     that CM cannot enforce the ownership rule across multiple runs of
841 :     CM.make. Fortunately, enclosing the same group in two different
842 :     libraries A and B which are not part of the same program does not
843 :     cause real problems.
844 :    
845 :     ----------------------------------------------------------------------
846 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
847 : mblume 1496 Date: 2004/05/20 16:00:00 CDT
848 :     Tag: blume-20040520-win32
849 :     Description:
850 :    
851 :     Made the win32 version work again. (Strangely, a misplaced comma had
852 :     slipped into win32-process.c which prevented the runtime from being
853 :     compiled correctly.)
854 :    
855 :     Also, included a minor addition to ml-build.bat analogous to what was
856 :     done in blume-20040519-ml-build.
857 :    
858 :     ----------------------------------------------------------------------
859 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
860 : mblume 1494 Date: 2004/05/19 22:10:00 CDT
861 :     Tag: blume-20040519-ml-build
862 :     Description:
863 :    
864 :     Arranged for ml-build to clean up after itself a little bit better.
865 :     The script generates a temporary SML source file and compiles it using
866 :     CM, so CM generates metadata (GUID, SKEL, objectfile) for it. It now
867 :     gets rid of those at the end, so they don't accumulate under .cm.
868 :    
869 :     This required a minor change to install.sh because the name of the
870 :     metadata directory (default: .cm) is actually configurable at
871 :     installation time.
872 :    
873 :     ----------------------------------------------------------------------
874 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
875 : mblume 1491 Date: 2004/05/18 15:50:00 CDT
876 :     Tag: blume-20040518-mkreader
877 :     Description:
878 :    
879 :     Added Posix.IO.mk{Bin,Text}{Reader,Writer} by lifting their respective
880 :     implementations from internal modules PosixBinPrimIO and PosixTextPrimIO.
881 :    
882 :     ----------------------------------------------------------------------
883 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
884 : mblume 1489 Date: 2004/05/11 14:35:00 CDT
885 :     Tag: blume-20040511-win32sock
886 :     Description:
887 :    
888 :     Added previously missing support for many socket-related functions
889 :     under win32. Thanks to David Hansel <hansel@reactive-systems.com>
890 :     for the voluminous patch!
891 :    
892 :     (I have not tested this patch under win32 yet.)
893 :    
894 : mblume 1490 Here is David's e-mail:
895 :    
896 :     Hi,
897 :    
898 :     Attached to this email you find a diff against sml/nj 110.45
899 :     that will enable socket support under Windows.
900 :    
901 :     To apply the patch (using unix or cygwin)
902 :     1) gunzip runtime.diff.gz
903 :     2) "cd" into "src/runtime" in the source tree of a fresh
904 :     110.45 installation.
905 :     3) patch -p 1 < [your/path/to]runtime.diff
906 :    
907 :     The code compiles fine but has NOT yet been extensively tested.
908 :     I only ran a few tests for basic socket client functionality
909 :     (which worked fine). Especially the functions that use ioctl
910 :     are not tested at all and might not work (see below).
911 :    
912 :     I implemented this since we want to move to a newer version of sml/nj
913 :     but need socket support in order to use it. This is the first time I
914 :     even had a look at the sml/nj source, so please review my changes
915 :     before making this part of the distribution! Here are a few issues
916 :     that I think might be better for someone to solve who is more
917 :     familiar with the sml/nj source (and socket programming):
918 :    
919 :     - getnetbyaddr.c and getnetbyname.c will raise a "not implemented"
920 :     exception since I could not figure out what the windows equivalent
921 :     of these functions is
922 :    
923 :     - In sockets-osdep.h there are a some #include statements that are
924 :     only used in a few files that include sockets-osdep.h
925 :    
926 :     - In smlnj-sock-lib.c, function init_fn() calls WSAStartup() but
927 :     does not process its return value since I don't know how to
928 :     report an error upwards.
929 :    
930 :     - It would probably be good to have a call to WSACleanup() when
931 :     the library is unloaded (if there is such a possibility).
932 :     Otherwise I think Windows will take care of this automatically
933 :     when the process finishes.
934 :    
935 :     - I used ioctlsocket() as a replacement for ioctl() but I have
936 :     no idea if that is actually the proper replacement on Windows.
937 :    
938 :     - All these issues are marked in the code by "FIXME" comments.
939 :    
940 :     We use sml/nj extensively in our products and are quite happy
941 :     with it. I hope this contribution will help you.
942 :    
943 :     Keep up the good work!
944 :    
945 :     David
946 :    
947 : mblume 1489 ----------------------------------------------------------------------
948 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
949 : mblume 1488 Date: 2004/05/11 14:20:00 CDT
950 :     Tag: blume-20040511-installml
951 :     Description:
952 :    
953 :     Fixed two bugs in installml script. (Thanks to Vesa A. Norrman for
954 :     the patch.)
955 :    
956 :     ----------------------------------------------------------------------
957 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
958 : mblume 1487 Date: 2004/05/11 14:05:00 CDT
959 :     Tag: blume-20040511-nlffi-netbsd
960 :     Description:
961 :    
962 :     Added support for nlffi under netbsd. (Thanks to Vesa A. Norrman for
963 :     the patch.)
964 :    
965 :     ----------------------------------------------------------------------
966 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
967 : mblume 1486 Date: 2004/05/11 12:05:00 CDT
968 :     Tag: blume-20040511-exports
969 :     Description:
970 :    
971 :     As per request by Adam Chlipala <adam@hcoop.net>, extended various
972 :     export lists in compiler-related .cm-files.
973 :    
974 :     ----------------------------------------------------------------------
975 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
976 : mblume 1485 Date: 2004/05/11 11:35:00 CDT
977 :     Tag: blume-20040511-allsource
978 :     Description:
979 :    
980 :     The installer now honors the "src-smlnj" target again, although its meaning
981 :     has changed from "all sources required for the compiler" to "all sources
982 :     the installer knows about". In other words, if you enable "src-smlnj"
983 :     in the "targets" file, then the installer will pull in sources for
984 :     everything. (Notice that this refers to source code only. Compiled
985 :     code is still only installed for modules that were requested explicitly
986 :     or which are required for other modules that were requested explicitly.)
987 :    
988 :     ----------------------------------------------------------------------
989 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
990 : mblume 1482 Date: 2004/04/23 17:40:00 CDT
991 :     Tag: blume-20040423-ieee-scan
992 :     Description:
993 :    
994 :     Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
995 :     in the exponent calculation we get INF or ZERO (depending on the mantissa
996 :     and the sign of the exponent).
997 :    
998 :     ----------------------------------------------------------------------
999 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1000 : mblume 1480 Date: 2004/04/23 10:40:00 CDT
1001 :     Tag: blume-20040423-ml-build
1002 :     Description:
1003 :    
1004 :     The ml-build script now terminates with a non-0 status when something
1005 :     goes wrong.
1006 :    
1007 :     ----------------------------------------------------------------------
1008 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1009 : mblume 1479 Date: 2004/04/22 16:35:00 CDT
1010 :     Tag: blume-20040422-Option
1011 :     Description:
1012 :    
1013 :     Made exception Option to be the same as exception Option.Option
1014 :     (as it should be).
1015 :    
1016 :     ----------------------------------------------------------------------
1017 : allenleung 1468 Name: Allen Leung (leunga (at) reservoir (dot) com)
1018 :     Date: 2004/03/19 14:40:00 EST
1019 :     Tag: leunga-20040319-cygwin-nlffi
1020 :     Description:
1021 :    
1022 :     Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
1023 :     of SML/NJ. The problem is that
1024 :    
1025 :     lib = dlopen(NULL, ...)
1026 :     f = dlsym(lib, "malloc");
1027 :    
1028 :     does not work on Windows unless we explicitly export symbols
1029 :     such as 'malloc' during linking. We fixed this by explicitly
1030 :     exporting the required symbols with the magic gcc incantation:
1031 :    
1032 :     -Wl,--export-all cygwin.def
1033 :    
1034 :     where cygwin.def is a file containing all the symbols that
1035 :     we wish to export.
1036 :    
1037 :     I suspect this is a Windows problem and we'll have to
1038 :     do the same (somehow with windows compilers) when
1039 :     we build the native win32 version with the system
1040 :     calls LoadLibrary/GetProcAddress.
1041 :    
1042 :     ----------------------------------------------------------------------
1043 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
1044 : mblume 1465 Date: 2004/03/04 16:35:00 CST
1045 :     Tag: blume-20040304-intinf-fmt
1046 :     Description:
1047 :    
1048 :     Fixed problem with IntInf.fmt (sign would show up on the right instead
1049 :     of on the left for BIN, OCT, and HEX).
1050 :    
1051 :     ----------------------------------------------------------------------
1052 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1053 : mblume 1464 Date: 2004/03/04 11:25:00 CST
1054 :     Tag: blume-20040304-symlinks
1055 :     Description:
1056 :    
1057 :     Fixed problem with installer script (unix only) where bin/ml-yacc and
1058 :     friends pointed (via symlinks) to absolute locations instead of just
1059 :     .run-sml. This was reported by Vesa A Norrman.
1060 :    
1061 :     ----------------------------------------------------------------------
1062 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1063 : mblume 1455 Date: 2004/02/13 14:50:00 CST
1064 :     Tag: Release_110_45
1065 :     Description:
1066 :    
1067 :     New working version (110.45). New bootfiles.
1068 :    
1069 :     ----------------------------------------------------------------------
1070 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1071 : mblume 1448 Date: 2004/01/26 15:15:15 CST
1072 :     Tag: blume-20040126-toplevel
1073 :     Description:
1074 :    
1075 :     Improved handling of exceptions at the interactive toplevel.
1076 :    
1077 :     ----------------------------------------------------------------------
1078 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1079 :     Date: 2004/01/26 11:25:00
1080 : mblume 1446 Tag: blume-20040126-app
1081 :     Description:
1082 :    
1083 :     Type of top-level "app" corrected.
1084 : mblume 1447 Added code for setting vp_limitPtrMask to Win32-specific runtime.
1085 : mblume 1446
1086 :     ----------------------------------------------------------------------
1087 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1088 : mblume 1427 Date: 2003/11/18 17:10 CST
1089 :     Tag: blume-20031118-basis-fiddle
1090 :     Description:
1091 :    
1092 :     - changed Timer interface to what might become the spec
1093 :     - POSIX_FLAGS -> BIT_FLAGS according to spec
1094 :     - some other minor discrepancies wrt. spec eliminated
1095 :    
1096 :     ----------------------------------------------------------------------
1097 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1098 : mblume 1414 Date: 2003/11/06 12:00:00 CST
1099 :     Tag: Release_110_44
1100 :     Description:
1101 :    
1102 :     New working version (110.44). New bootfiles.
1103 :    
1104 :     ----------------------------------------------------------------------
1105 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1106 : mblume 1411 Date: 2003/11/04 11:50:00 CST
1107 :     Tag: blume-20031104-move-libraries
1108 :     Description:
1109 :    
1110 :     Eliminated the "dont_move_libraries" directive in config/targets.
1111 :     (The mechanism was broken and could not be fixed easily. Moreover,
1112 :     there does not seem to be any reason not to move all libraries into
1113 :     lib during installation. I originally implemented this directive as a
1114 :     backward-compatibility feature when I first introduced the new CM.
1115 :     Now that things have been stable for a long time and going back to the
1116 :     old CM is not an option, there is no reason to keep it around.)
1117 :    
1118 :     ----------------------------------------------------------------------
1119 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1120 : mblume 1409 Date: 2003/11/03 16:00:00 CST
1121 :     Tag: blume-20031103-installdir
1122 :     Description:
1123 :    
1124 :     Made installer honor INSTALLDIR variable again. (Thanks to Chris
1125 :     Richards for pointing out the problem and providing the solution.)
1126 :    
1127 :     ----------------------------------------------------------------------
1128 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1129 : mblume 1400 Date: 2003/10/01 17:05:00 CDT
1130 :     Tag: blume-20031001-lal-mlrisc
1131 :     Description:
1132 :    
1133 :     MLRISC bug fix from Lal.
1134 :    
1135 :     ----------------------------------------------------------------------
1136 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1137 : mblume 1399 Date: 2003/09/30 16:10:00 CDT
1138 :     Tag: blume-20030930-primio-bat
1139 : mblume 1398 Description:
1140 :    
1141 :     1. Added openVector, nullRd, and nullWr to PRIM_IO.
1142 :     2. Improved .bat files (for Win32 port) to make things work under Win95.
1143 :     (thanks to Aaron S. Hawley for this one)
1144 :    
1145 :     ----------------------------------------------------------------------
1146 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1147 : mblume 1395 Date: 2003/09/26 16:05:00 CDT
1148 :     Tag: blume-20030926-wrappriv
1149 :     Description:
1150 :    
1151 :     Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
1152 :    
1153 :     ----------------------------------------------------------------------
1154 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1155 : mblume 1394 Date: 2003/09/26 15:00:00 CDT
1156 :     Tag: blume-20030926-110_43_3
1157 :     Description:
1158 :    
1159 :     - additional cleanup
1160 :     - version number bump, NEW BOOTFILES
1161 :    
1162 :     ----------------------------------------------------------------------
1163 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1164 : mblume 1393 Date: 2003/09/26 12:00:00 CDT
1165 :     Tag: blume-20030926-ppautoload
1166 :     Description:
1167 :    
1168 :     I modified the read-eval-print loop so that the autoloader gets
1169 :     invoked whenever the prettyprinter tries to look up a symbol that
1170 :     is not currently defined in the toplevel environment but which
1171 :     appears in CM's autoload registry. As a result, we see far fewer of
1172 :     those ?.Foo.Bar.xxx names in the prettyprinter's output.
1173 :    
1174 :     In addition to this I tried to clean up some pieces of the Basis
1175 :     implementation (e.g., Socket, Word8Array) in order to prevent other
1176 :     instances of these ?.Foo.Bar.xxx names from being printed.
1177 :    
1178 :     The mechanism that picks names for types still needs some work, though.
1179 :     (Right now it seems that if there is a type A.t which is defined to
1180 : mblume 1394 be B.u, but B is unavailable at toplevel, then A.t gets printed as
1181 :     "?.B.u" although the perhaps more sensible solution would be to use
1182 : mblume 1393 "A.t" in this case. In other words, the prettyprinter should follow
1183 :     a chain of DEFtycs not farther than there are corresponding toplevel
1184 :     names in the current environment.)
1185 :    
1186 :     ----------------------------------------------------------------------
1187 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1188 : mblume 1391 Date: 2003/09/24 16:31:00 CDT
1189 :     Tag: blume-20030924-installer
1190 :     Description:
1191 :    
1192 :     Another installer tweak: All the ML code for the installer is now
1193 :     compiled during CMB.make and put into a little library called
1194 :     $smlnj/installer.cm. The installation then simply invokes
1195 :    
1196 :     sml -m $smlnj/installer.cm
1197 :    
1198 :     and everything happens automagically.
1199 :    
1200 :     Win32: ML code senses value of environment variable SMLNJ_HOME.
1201 :     Unix: ML code senses values of environment variables ROOT, CONFIGDIR,
1202 :     and BINDIR.
1203 :    
1204 :     The new scheme guarantees that the ML code responsible for the installation
1205 :     is in sync with the APIs of the main system. Also, the installer is
1206 :     somewhat faster because the installer script is precompiled.
1207 :    
1208 :     ----------------------------------------------------------------------
1209 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1210 : mblume 1390 Date: 2003/09/24 15:35:00 CDT
1211 :     Tag: blume-20030924-synsock
1212 :     Description:
1213 :    
1214 :     Added a signature SYNCHRONOUS_SOCKET to basis.cm. This is like SOCKET
1215 :     but excludes all non-blocking operations. Defined SOCKET (in Basis)
1216 :     and CML_SOCKET in terms of SYNCHRONOUS_SOCKET. Removed superfluous
1217 :     implementations of non-blocking operations from CML's Socket
1218 :     structure.
1219 :    
1220 :     ----------------------------------------------------------------------
1221 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1222 : mblume 1389 Date: 2003/09/24 15:10:05 CDT
1223 :     Tag: blume-20030924-sockets
1224 :     Description:
1225 :    
1226 :     1. Fixed SOCKET API and implementation to match Basis spec.
1227 :     This required changing the internal representation of sockets to one
1228 :     that remembers (for each socket file descriptor) whether it is currently
1229 :     blocking or non-blocking. This state is maintained lazily (i.e., a system
1230 :     call is made only if the state actually needs to change).
1231 :    
1232 :     2. OS-specific details of sockets were moved into separate files, thus
1233 :     making it possible to unify the bulk of the socket implementations
1234 :     between Unix and Win32.
1235 :    
1236 :     3. CML's socket API changed accordingly.
1237 :     (Note that we need to remove non-blocking functions from this API
1238 :     since they are redundant in the case of CML!)
1239 :    
1240 :     4. CML's socket implementation now makes use of non-blocking functions
1241 :     provided by Basis, thus removing all OS-dependent code from this part
1242 :     of CML.
1243 :    
1244 :     5. Changed Real64.precision from 52 to 53. Minor cleanup in Real64 code.
1245 :    
1246 :     ----------------------------------------------------------------------
1247 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1248 : mblume 1387 Date: 2003/09/22 12:10:00 CDT
1249 : mblume 1388 Tag: blume-20030922-110_43_2
1250 : mblume 1387 Description:
1251 :    
1252 :     Made a new interim version and bootfiles for developer's bootstrapping
1253 :     convenience.
1254 :    
1255 :     110.43.2 -- NEW BOOTFILES
1256 :    
1257 :     ----------------------------------------------------------------------
1258 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1259 : mblume 1385 Date: 2003/09/19 15:55:00 CDT
1260 :     Tag: blume-20030919-cmdir
1261 :     Description:
1262 :    
1263 :     1. new-install.sh -> install.sh
1264 :     2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
1265 :     3. tweaked installer so that another name instead of .cm can be chosen
1266 :     at install time (by setting the CM_DIR_ARC environment variable
1267 :     during installation); once installation is complete, the name is
1268 :     fixed
1269 :    
1270 :     ----------------------------------------------------------------------
1271 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1272 : mblume 1384 Date: 2003/09/18 16:00:00 CDT
1273 :     Tag: blume-20030918-110_43_1
1274 :     Description:
1275 :    
1276 :     Made a new interim version and bootfiles for developer's bootstrapping
1277 :     convenience.
1278 :    
1279 :     110.43.1 -- NEW BOOTFILES
1280 :    
1281 :     ----------------------------------------------------------------------
1282 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1283 : mblume 1383 Date: 2003/09/18 15:20:00 CDT
1284 :     Tag: blume-20030918-misc
1285 :     Description:
1286 :    
1287 :     1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
1288 :     this seems to be controversial at the moment) and used those in
1289 :     Posix.ProcEnv.times.
1290 :    
1291 :     2. Added Time.{from,to}Nanoseconds to Time.
1292 :    
1293 :     3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
1294 :     For example, fromLargeInt never needs to look at more than 3 "big
1295 :     digits" to get its 53 bits of precision.
1296 :    
1297 :     ----------------------------------------------------------------------
1298 : mblume 1384 Name: Matthias Blume (blume (at) tti - c (dot) org)
1299 : mblume 1381 Date: 2003/09/17 16:30:00 CDT
1300 :     Tag: blume-20030917-real32-slices
1301 :     Description:
1302 :    
1303 :     Added an entry to the primitive environment
1304 :     (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
1305 :     added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
1306 :    
1307 :     Removed some of the "magic" constants in real64.sml and replaced them
1308 :     with code that generates these values from their corresponding
1309 :     integer counterparts.
1310 :    
1311 :     Made all(?) the slice-related changes to the Basis and made everything
1312 :     compile again...
1313 :    
1314 :     ----------------------------------------------------------------------
1315 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1316 : mblume 1375 Date: 2003/09/15 17:45:00 CDT
1317 :     Tag: blume-20030915-rbase
1318 :     Description:
1319 :    
1320 :     Fixed bug in Real.fromLargeInt.
1321 :    
1322 :     ----------------------------------------------------------------------
1323 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1324 : mblume 1369 Date: 2003/09/13 18:11:00 CDT
1325 :     Tag: blume-20030913-libinstall
1326 :     Description:
1327 :    
1328 :     Minor bugfix in config/libinstall (set anchor with path to
1329 :     standalone tool after installing it, otherwise libraries that
1330 :     need ml-lex or ml-yacc won't compile the first time the installer
1331 :     runs).
1332 :    
1333 :     ----------------------------------------------------------------------
1334 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1335 : mblume 1368 Date: 2003/09/12 11:45:00 CDT
1336 :     Tag: blume-20030912-various
1337 :     Description:
1338 :    
1339 :     - fixed bug in Real.toLargeInt
1340 :     - fixed bug in Posix.ProcEnv.times
1341 :     - changed inputLine functions to return an option
1342 :     - minor installer improvements / bugfixes
1343 :     - changed default @SMLalloc parameter for x86/celeron to 64k
1344 :    
1345 :     ----------------------------------------------------------------------
1346 :     Name: Matthias Blume (blume (at) tti - c (dot) org)
1347 : mblume 1356 Date: 2003/09/09 22:00:00 CDT
1348 :     Tag: Release_110_43
1349 :     Description:
1350 :    
1351 :     New working release 110.43. New bootfiles.
1352 :    
1353 :     ----------------------------------------------------------------------
1354 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1355 : mblume 1354 Date: 2003/09/09 19:20:00 CDT
1356 :     Tag: blume-20030909-installer
1357 :     Description:
1358 :    
1359 :     Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
1360 :     Modified config/install.bat to take advantage of it. Also modified
1361 :     config/install.sh (and called it config/new-install.sh) to take advantage
1362 :     of it on Unix systems. (The SML code is (supposed to be) platform-
1363 :     independent.)
1364 :    
1365 :     The installer can now install everything under Win32
1366 :     as well as under *nix as long as it compiles.
1367 :    
1368 :     Other changes:
1369 :    
1370 :     - made CML compile again under Win32
1371 :     - made eXene compile under Win32 (by providing a fake structure UnixSock
1372 :     and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
1373 :     - fixed a bug in nowhere: it assumed that type OS.Process.status is the
1374 :     same as type int; under Win32 it isn't
1375 :     - fixed some slice-related problems in the win32-specific parts of CML
1376 :     - added a functor argument "sameVol" to os-path-fn.sml in the Basis
1377 :     (under Win32, the volume name is case-insensitive, and the
1378 :     OS.Path code compares volume names for equality)
1379 :    
1380 :     ----------------------------------------------------------------------
1381 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1382 : mblume 1353 Date: 2003/09/08 11:55:00 CDT
1383 :     Tag: blume-20030908-fullpath
1384 :     Description:
1385 :    
1386 :     Made Win32 version of OS.FileSys.fullPath return current directory
1387 :     when given an empty string. This is what the spec says, and incidentally,
1388 :     CM depends on it. (CM otherwise goes into an infinite loop in certain
1389 :     cases when presented with the name of a non-existing .cm file.)
1390 :    
1391 :     ----------------------------------------------------------------------
1392 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1393 : mblume 1350 Date: 2003/09/04 16:30:00 CDT
1394 : mblume 1352 Tag: blume-20030905-slices-etc
1395 : mblume 1350 Description:
1396 :    
1397 :     1. Changed interface to vectors and arrays in Basis to match
1398 :     (draft) Basis spec.
1399 :     2. Added signatures and implementations of slices according to
1400 :     Basis spec.
1401 :     3. Edited source code throughout the system to make it compile again
1402 :     under 1. and 2. (In some cases code had to be added to have it
1403 :     match the new signatures.)
1404 :     4. MLRISC should be backward-compatible: the copies of the originals
1405 :     of files that needed to change under 3. were retained, the .cm files
1406 :     check the compiler version number and use old versions when
1407 :     appropriate.
1408 :     5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
1409 :     dirstream -> string option (in accordance with Basis spec).
1410 :     6. When generating code that counts lines, ml-lex used function
1411 :     CharVector.foldli, taking advantage of its old interface.
1412 :     This has been replaced with the corresponding code from
1413 :     CharVectorSlice. (html-lex must be re-lexed!)
1414 :     7. BitArray in smlnj-lib/Util has been extended/modified to match the
1415 :     new MONO_ARRAY signature. (Do we need BitArraySlice?)
1416 :     8. Removed temporary additions (fromInternal, toInternal) from the
1417 :     (now obsolete) IntInf in smlnj-lib/Util.
1418 :     9. Cleaned up structure Byte.
1419 :     10. Added localOffset, scan, and fromString to Date (according to spec).
1420 :     Cleaned/corrected implementation of Date.
1421 :     (Still need to check for correctness; implement better canonicalizeDate.)
1422 :     11. Added "scan" to signature IEEE_REAL.
1423 :     12. Some improvements to IntInf [in particular: efficiency-hack for
1424 :     mod and rem when second operand is 2 (for parity checks).]
1425 :     13. Changed representation of type Time.time, using a single IntInf.int
1426 :     value counting microseconds. This considerably simplified the
1427 :     implementation of structure Time. We now support negative time
1428 :     values; scan and fromString handle signs.
1429 :     14. Functor PrimIO now takes two additional arguments (VectorSlice and
1430 :     ArraySlice).
1431 :    
1432 :     ----------------------------------------------------------------------
1433 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1434 : mblume 1347 Date: 2003/08/28 17:00:00 CDT
1435 :     Tag: blume-20030828-intinf
1436 :     Description:
1437 :    
1438 :     This is a major update which comes with a version number bump
1439 :     (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
1440 :     and an implementation of IntInf in the Basis.
1441 :    
1442 :     There are a fairly large number of related changes and updates throughout
1443 :     the system:
1444 :    
1445 :     Basis:
1446 :     - Implemented IntInf.
1447 :     - Made LargeInt a projection of IntInf (by filtering through INTEGER).
1448 : mblume 1348 - Added some missing Real64 operations, most notably Real.toLargeInt.
1449 : mblume 1347 - Added FixedInt as a synonym for Int32.
1450 :    
1451 :     compiler:
1452 :     * Added support for a built-in intinf type.
1453 :     - literals
1454 :     - pattern matching
1455 :     - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
1456 :     - overloading on literals and operations
1457 :    
1458 :     This required adding a primitive type intinf, some additional
1459 :     primops, and implementations for several non-trivial intinf
1460 :     operations in Core. (The intinf type is completely abstract
1461 :     to the compiler; all operations get delegated back to the Core.)
1462 :    
1463 :     * Intinf equality is handled by polyequal. However, the compiler
1464 :     does not print its usual warning in this case (since polyequal
1465 :     is the right thing to do there).
1466 :    
1467 :     * Improved the organization of structure InlineT.
1468 :    
1469 :     * A word about conversion primops:
1470 :     If conversions involving intinf do not cancel out during
1471 : mblume 1348 CPS contract, then the compiler must insert calls to Core functions.
1472 : mblume 1347 Since all core access must be resolved already during the FLINT
1473 :     translate phase, it would be too late a the time of CPS contract
1474 : mblume 1348 to add new Core calls. For this reason, conversion primops
1475 : mblume 1347 for intinf carry two arguments: 1. the numeric argument that
1476 :     they are supposed to convert, and 2. the Core function that
1477 :     can help with this conversion if necessary. If CPS contract
1478 : mblume 1348 eliminates a primop, then the associated Core function becomes
1479 :     dead and goes away. Intinf conversion primops that do not get
1480 :     eliminated by CPS contract get rewritten into calls of their
1481 :     core functions by a separate, new phase.
1482 : mblume 1347
1483 :     interactive system:
1484 :     - Control.Print.intinfDepth controls max length of intinf constants
1485 :     being printed. (Analogous to Control.Print.stringDepth.)
1486 :     - Cleanup in printutil and pputil: got rid of unused stuff and
1487 :     duplicates; replaced some of the code with code that makes better
1488 :     use of library functionality.
1489 :    
1490 :     CM:
1491 :     Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
1492 :     are no longer silent.
1493 :    
1494 :     CKIT:
1495 :     Fixed mismatched uses of Int32 and LargeInt. I always decided
1496 :     in favor of LargeInt -- which is now the same as IntInf.
1497 :     CKIT-knowledgable people should check whether this is what's
1498 :     intended and otherwise change things back to using Int32 or
1499 :     FixedInt.
1500 :    
1501 :     Throughout the code:
1502 : mblume 1348 Started using IntInf.int literals and built-in operations
1503 : mblume 1347 (e.g., comparison with 0) where this seems appropriate.
1504 :    
1505 :    
1506 :     ----------------------------------------------------------------------
1507 : macqueen 1343 Name: Dave MacQueen (dbm@cs.uchicago.edu)
1508 :     Date: 2003/08/13 11:36:00 CDT
1509 :     Tag: dbm-20030813-mcz-merge1
1510 :     Description:
1511 :    
1512 :     Merging changes from the mcz-branch development branch into trunk.
1513 :     These changes involve replacement of the emulated old prettyprinter
1514 :     interface with direct use of the SML/NJ Lib PP library, and fixing
1515 :     of a couple of bugs (895, 1186) relating to error messages. A new
1516 :     prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
1517 :     has been added.
1518 :    
1519 :     ----------------------------------------------------------------------
1520 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1521 : mblume 1342 Date: 2003/08/11 15:45:00 CDT
1522 :     Tag: blume-20030811-windows
1523 :     Description:
1524 :    
1525 :     Version number bumped to 110.42.9. NEW BOOTFILES!!!
1526 :    
1527 :     http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
1528 :    
1529 :     This patch restores SML/NJ's ability to run under win32. There are a
1530 :     number of changes, including fixes for several bugs that had gone
1531 :     unnoticed until now:
1532 :    
1533 :     - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
1534 :     trying to run the win32 version from within cygwin.)
1535 :    
1536 :     - There are a number of simple .bat scripts that substitute for their
1537 :     corresponding Unix shell-scripts. (See below.)
1538 :    
1539 :     - The internals of ml-build have been modified slightly. The main
1540 :     difference is that instead of calling ".link-sml" (or link-sml.bat)
1541 :     using OS.Process.system, the ML process delegates this task back
1542 :     to the script. Otherwise problems arise in mixed environments such
1543 :     as Cygwin where scripts look and work like Unix scripts, but
1544 :     where OS.Process.system cannot run them.
1545 :    
1546 :     - In CM, the srcpath pickler used native pathname syntax -- which
1547 :     is incorrect in the case of cross-compilation. The new pickle format
1548 :     is independent of platform-specific naming conventions.
1549 :    
1550 :     - Path configuration files (such as lib/pathconfig) can now choose
1551 :     between native and standard syntax. Placing a line of the form
1552 :    
1553 :     standard!
1554 :    
1555 :     into the file causes all subsequent paths to be interpreted using
1556 :     CM standard pathname syntax (= Unix conventions); a line
1557 :    
1558 :     native!
1559 :    
1560 :     switches back to native style. This was needed so that
1561 :     path config files can be written portably, see src/system/pathconfig.
1562 :    
1563 :     - Runtime system:
1564 :    
1565 :     - win32-filesys.c: get_file_time and set_file_time now
1566 :     access modification time, not creation time.
1567 :    
1568 :     - I/O code made aware of new array representation.
1569 :    
1570 :     - Bug fixes in X86.prim.masm.
1571 :    
1572 :     - src/system/makeml made aware of win32. (For use under cygwin
1573 :     and other Unix-environments for windows.)
1574 :    
1575 :     - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
1576 :     which caused BinIO.inputAll to fail consistently.
1577 :    
1578 :     .bat scripts:
1579 :    
1580 :     Windows .bat scripts assume that SMLNJ_HOME is defined.
1581 :    
1582 :     - sml.bat, ml-yacc.bat, ml-lex.bat: Driver scripts for standalone
1583 :     applications (sml, ml-yacc, ml-lex).
1584 :     - ml-build.bat: analogous to ml-build.
1585 :     - config\install.bat: Analogous to config/install.sh. This requires
1586 :     that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
1587 :     (nmake etc. must be on the path, and vcvars32 must have been run.)
1588 :     Moreover, sources for ml-lex and ml-yacc need to exist under src,
1589 :     and the bootfile hierarchy must have been unpacked under
1590 :     sml.boot.x86-win32.
1591 :     The script is very primitive and does a poor job at error checking.
1592 :     It only installs the base system, ml-lex, and ml-yacc. No other
1593 :     libraries are being installed (i.e., you get only those that
1594 :     are part of the compiler.)
1595 :     - link-sml.bat: analogous to .link-sml, but not currently used
1596 :    
1597 :     Unrelated bug fixes:
1598 :    
1599 :     - ml-nlffigen now exports structures ST_* corresponding to incomplete
1600 :     types.
1601 :     - Added getDevice to PP/src/pp-debug-fn.sml. (Would not compile
1602 :     otherwise.)
1603 :    
1604 :     ----------------------------------------------------------------------
1605 : macqueen 1337 Name: Dave MacQueen (macqueen@cs.uchicago.edu)
1606 :     Date: 2003/06/17
1607 :     Tag: macqueen-20030617-bug895
1608 :     Description:
1609 :    
1610 :     Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
1611 :     Tag will be used for new development branch (mcz-branch) for
1612 :     use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
1613 :    
1614 :     ----------------------------------------------------------------------
1615 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1616 : mblume 1335 Date: 2003/05/27 16:55:00 CDT
1617 :     Tag: blume-20030527-polyeq
1618 :     Description:
1619 :    
1620 :     Tried to eliminated most cases of polymorphic equality.
1621 :    
1622 :     ----------------------------------------------------------------------
1623 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1624 : mblume 1334 Date: 2003/05/21 17:45:00 CDT
1625 :     Tag: blume-20030517-complete
1626 :     Description:
1627 :    
1628 :     Two changes:
1629 :    
1630 :     1. Added a flag for controlling whether non-exhaustive bindings will
1631 :     be treated as errors (default is false).
1632 :     2. Cleaned up the *entire* source tree so that CMB.make goes through
1633 :     without a single non-exhaustive match- or bind warning.
1634 :    
1635 :     ----------------------------------------------------------------------
1636 : mblume 1368 Name: Matthias Blume (blume (at) tti - c (dot) org)
1637 : mblume 1332 Date: 2003/05/17 10:20:00 CDT
1638 :     Tag: blume-20030517-absyn
1639 :     Description:
1640 :    
1641 :     1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
1642 :    
1643 :     This mainly affects the quality of error messages. However, some
1644 :     of the code is now more straightforward than before. (Treatment of
1645 :     the above four constructs in translate.sml is much simpler than
1646 :     the "macro-expansion" that was going on before. Plus, the mach-
1647 :     compiler no longer gets invoked just to be able to compile an
1648 :     if-expression.)
1649 :    
1650 :     2. The ErrorMsg.Error exception is now caught and absorbed by the
1651 :     interactive loop.
1652 :    
1653 :     ----------------------------------------------------------------------
1654 : allenleung 1327 Name: Allen Leung
1655 :     Date: 2003/05/16 13:05:00 CDT
1656 :     Tag: leunga-20030516-cygwin-runtime
1657 :     Description:
1658 :    
1659 :     Ported the runtime system to cygwin, which uses the unix
1660 :     x86-unix bin files. Missing/buggy features:
1661 :    
1662 :     o getnetbyname, getnetbyaddr: these functions seem to be missing in
1663 :     the Cygwin library.
1664 :     o Ctrl-C handling may be flaky.
1665 :     o Windows system calls and Windows I/O are not supported.
1666 :    
1667 :     A new set of binfiles is located at:
1668 :    
1669 :     http://www.dorsai.org/~leunga/boot.x86-unix.tgz
1670 :    
1671 :     This is only needed for bootstrapping the cygwin version of smlnj.
1672 :     Other x86 versions can use the existing binfiles.
1673 :    
1674 :     ----------------------------------------------------------------------
1675 : mblume 1317 Name: Matthias Blume
1676 :     Date: 2003/04/08 15:42:00 CDT
1677 :     Tag: blume-20030408-listpair
1678 :     Description:
1679 :    
1680 :     1. Added a target 'mlrisc' to installer.
1681 :    
1682 :     2. Added missing elements to structure ListPair.
1683 :    
1684 :     ----------------------------------------------------------------------
1685 : leunga 1296 Name: Allen Leung
1686 :     Date: 2003/01/07 10:40:00 EST
1687 :     Tag: leunga-20030107-int-rem
1688 :     Description:
1689 :    
1690 :     Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
1691 :     The arguments to the SUBL instruction were swapped.
1692 :    
1693 :     ----------------------------------------------------------------------
1694 : blume 1229 Name: Matthias Blume
1695 : blume 1294 Date: 2002/12/12 16:25:00 EST
1696 :     Tag: blume-20021212-risc-ra
1697 :     Description:
1698 :    
1699 :     Fixed a serious bug in the rewrite code for FP spilling/reloading that
1700 :     sent the RA into an infinite loop when floating point registers get
1701 :     spilled. (Because of this bug, e.g., nucleic stopped compiling between
1702 :     110.37 and 110.38.)
1703 :     There was another set of potential problems related to the handling of
1704 :     MLRISC annotations (but those did not yet cause real problems, apparently).
1705 :    
1706 :     ----------------------------------------------------------------------
1707 :     Name: Matthias Blume
1708 : blume 1291 Date: 2002/12/06 22:40:00 EST
1709 :     Tag: blume-20021206-cm-fileid
1710 :     Description:
1711 :    
1712 :     Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
1713 :     This fixes the problem of CM getting confused by files that suddenly
1714 :     change their identity (e.g., by getting unlinked and recreated by some
1715 :     text editor such as vi). There might be a better/cheaper/cleaner way
1716 :     of doing this, but for now this will have to do.
1717 :    
1718 :     ----------------------------------------------------------------------
1719 :     Name: Matthias Blume
1720 : blume 1288 Date: 2002/10/28 09:50:00 EST
1721 :     Tag: blume-20021028-typecheck
1722 :     Description:
1723 :    
1724 :     Exported structure Typecheck from $smlnj/viscomp/core.cm.
1725 :    
1726 :     ----------------------------------------------------------------------
1727 :     Name: Matthias Blume
1728 : blume 1282 Date: 2002/10/17 09:10:00 EDT
1729 : blume 1279 Tag: Release_110_42
1730 :     Description:
1731 :    
1732 : blume 1282 In good old tradition, there has been a slight hiccup so that we have
1733 :     to patch 110.42 after the fact. The old release tag has been replaced
1734 :     (see below).
1735 :    
1736 :     The change solves a problem with two competing approaches the
1737 :     configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
1738 :     each other's way.
1739 :    
1740 :     This change only affects the runtime system code and the installer script.
1741 :     (No new bootfiles.)
1742 :    
1743 :     ----------------------------------------------------------------------
1744 :     Name: Matthias Blume
1745 :     Date: 2002/10/16 12:00:00 EDT
1746 :     Tag: Release_110_42_removed
1747 :     Description:
1748 :    
1749 : blume 1279 New working release. New bootfiles.
1750 :    
1751 :     ----------------------------------------------------------------------
1752 :     Name: Matthias Blume
1753 : blume 1273 Date: 2002/10/10 13:10:00 EDT
1754 :     Tag: blume-20021010-ppc-divs
1755 :     Description:
1756 :    
1757 :     The mltree operator DIVS must be implemented with an overflow check on
1758 :     the PPC because the hardware indicates divide-by-zero using "overflow" as
1759 :     well.
1760 :    
1761 :     ----------------------------------------------------------------------
1762 :     Name: Matthias Blume
1763 : blume 1261 Date: 2002/07/23 11:45:00
1764 :     Tag: blume-20020723-smlnj-home
1765 :     Description:
1766 :    
1767 :     Sml now senses the SMLNJ_HOME environment variable. If this is set,
1768 :     then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
1769 :     CM_PATHCONFIG is also set), the path configuration file is assumed
1770 :     to be in $SMLNJ_HOME/lib/pathconfig. This way one can easily move
1771 :     the entire tree to some other place and everything will "just work".
1772 :    
1773 :     (Companion commands such as ml-build and ml-makedepend also sense this
1774 :     variable.)
1775 :    
1776 :     ----------------------------------------------------------------------
1777 :     Name: Matthias Blume
1778 : blume 1259 Date: 2002/07/12 21:19:00 EDT
1779 :     Tag: blume-20020712-liveness
1780 :     Description:
1781 :    
1782 :     Exported two useful "step" functions from liveness module (MLRISC).
1783 :    
1784 :     ----------------------------------------------------------------------
1785 :     Name: Matthias Blume
1786 : blume 1253 Date: 2002/07/05 16:00 EDT
1787 :     Tag: Release_110_41
1788 :     Description:
1789 :    
1790 :     New working release. New bootfiles.
1791 :    
1792 :     ----------------------------------------------------------------------
1793 :     Name: Matthias Blume
1794 : blume 1250 Date: 2002/07/05 10:25:00 EDT
1795 :     Tag: blume-20020705-btimp
1796 :     Description:
1797 :    
1798 :     Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
1799 :     other clients can set up backtracing support.
1800 :    
1801 :     ----------------------------------------------------------------------
1802 :     Name: Matthias Blume
1803 : blume 1249 Date: 2002/06/25 17:23:00 EDT
1804 :     Tag: blume-20020625-fpmax
1805 :     Description:
1806 :    
1807 :     Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
1808 :     case. (The sense of the isNaN test was reversed -- which made min and
1809 :     max always return their first argument.)
1810 :    
1811 :     ----------------------------------------------------------------------
1812 :     Name: Matthias Blume
1813 : blume 1240 Date: 2002/06/11
1814 :     Tag: blume-20020611-unixpath
1815 :     Description:
1816 :    
1817 :     Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
1818 :    
1819 :     ----------------------------------------------------------------------
1820 :     Name: Matthias Blume
1821 : blume 1238 Date: 2002/06/10 16:35:00 EDT
1822 :     Tag: blume-20020610-ieeereal
1823 :     Description:
1824 :    
1825 :     I back-ported my implementation of IEEEReal.fromString from the
1826 :     idlbasis-devel branch so that we can test it.
1827 :    
1828 :     Another small change is that ppDec tries to give more information
1829 :     than just "<sig>" in the case of functors. However, this code is
1830 :     broken in some mysterious way if the functor's body's signature
1831 :     has not been declared by ascription but gets inferred from the
1832 :     implementation. This needs fixing...
1833 :    
1834 :     ----------------------------------------------------------------------
1835 :     Name: Matthias Blume
1836 : blume 1229 Date: 2002/05/31
1837 :     Tag: blume-20020531-btrace-mode
1838 :     Description:
1839 :    
1840 :     Resurrected SMLofNJ.Internals.BTrace.mode. (It accidentally fell by
1841 :     the wayside when I switched over to using Controls everywhere.)
1842 :    
1843 :     ----------------------------------------------------------------------
1844 : george 1222 Name: Lal George
1845 :     Date: 2002/05/23 12:21:40 EDT
1846 :     Tag: george-20020523-visual-labels
1847 :     Description:
1848 :    
1849 :     Labels are now displayed in the graphical output to make
1850 :     the fall-through and target blocks obvious.
1851 :    
1852 :     ----------------------------------------------------------------------
1853 : blume 1204 Name: Matthias Blume
1854 : blume 1220 Date: 2002/05/22 11:03:00 EDT
1855 :     Tag: blume-20020522-shrink
1856 :     Description:
1857 :    
1858 :     John tweaked yesterday's fix for 1131 to handle an out-of-memory
1859 :     situation that comes up when allocating huge arrays.
1860 :    
1861 :     ----------------------------------------------------------------------
1862 :     Name: Matthias Blume
1863 : blume 1215 Date: 2002/05/21 16:00:00 EDT
1864 :     Tag: Release_110_40
1865 :     Description:
1866 :    
1867 :     New working release (110.40). New bootfiles.
1868 :    
1869 :     [Also: John Reppy fixed GC bug 1131.]
1870 :    
1871 :     ----------------------------------------------------------------------
1872 :     Name: Matthias Blume
1873 : blume 1212 Date: 2002/05/21 12:35:00 EDT
1874 :     Tag: blume-20020521-cmdoc
1875 :     Description:
1876 :    
1877 :     CM documentation update.
1878 :    
1879 :     ----------------------------------------------------------------------
1880 :     Name: Matthias Blume
1881 : blume 1211 Date: 2002/05/21 10:55:00 EDT
1882 :     Tag: blume-20020521-misc
1883 :     Description:
1884 :    
1885 :     - John tweaked runtime to be silent on heap export (except when
1886 :     GC messages are on).
1887 :     - I added a few more things (cross-compiling versions of CMB) to
1888 :     config/preloads (as suggestions).
1889 :    
1890 :     ----------------------------------------------------------------------
1891 :     Name: Matthias Blume
1892 : blume 1208 Date: 2002/05/20 22:25:00 EDT
1893 :     Tag: blume-20020520-controls
1894 :     Description:
1895 :    
1896 :     - Added ControlUtil structure to control-lib.cm.
1897 :     - Use it throughout.
1898 :     - Used Controls facility to define MLRISC controls (as opposed to
1899 :     registering MLRISC control ref cells with Controls after the fact)
1900 :     - Fixed messed-up controls priorities.
1901 :    
1902 :     * Removed again all the stuff from config/preloads that one wouldn't
1903 :     be able to preload at the time the initial heap image is built.
1904 :     (Many libraries, e.g., CML, do not exist yet at this time. The
1905 :     only libraries that can be preloaded via config/preloads are those
1906 :     that come bundled with the bootfiles.)
1907 :    
1908 :     ----------------------------------------------------------------------
1909 :     Name: Matthias Blume
1910 : blume 1204 Date: 2002/05/20 10:59:00 EDT
1911 :     Tag: blume-20020520-preloads
1912 :     Description:
1913 :    
1914 :     Added a lot of commented-out suggestions for things to be included
1915 :     in config/preloads.
1916 :    
1917 :     ----------------------------------------------------------------------
1918 : leunga 1203 Name: Allen Leung
1919 :     Date: 2002/05/18 14:20:00 EDT
1920 :     Tag: leunga-20020518-mdl
1921 :     Description:
1922 :    
1923 :     o Made the mdl tool stuff compile and run again.
1924 :     o I've disabled all the stuff that depends on RTL specifications; they
1925 :     are all badly broken anyway.
1926 :    
1927 :     ----------------------------------------------------------------------
1928 : blume 1201 Name: Matthias Blume
1929 :     Date: 2002/05/17 16:49:00 EDT
1930 :     Tag: blume-20020517-controls
1931 :     Description:
1932 :    
1933 :     0. John Reppy made several modifications to the SML/NJ library.
1934 :     In particular, there is a shiny new controls-lib.cm.
1935 :    
1936 :     1. Pushed new controls interface through compiler so that everything
1937 :     compiles again.
1938 :    
1939 :     2. Added FormatComb and FORMAT_COMB to the CML version of the
1940 :     SML/NJ library (so that CML compiles again).
1941 :    
1942 :     3. Modified init scripts because XXX_DEFAULT environment variables
1943 :     are no longer with us. (Boot-time initialization is now done
1944 :     using the same environment variables that are also used for
1945 :     startup-time initialization of controls.)
1946 :    
1947 :     ----------------------------------------------------------------------
1948 : george 1192 Name: Lal George
1949 :     Date: 2002/05/15 09:20:10 EDT
1950 :     Tag: george-20020515-pseudo-op-decls
1951 :     Description:
1952 :    
1953 :     All pseudo-ops emitted before the first segment declaration
1954 :     such as TEXT, DATA, and BSS directives are assumed to be global
1955 :     declarations and are emitted first in the assembly file. This is
1956 :     useful in a number of situations where one has pseudo-ops that are not
1957 :     specific to any segment, and also works around the constraint that one
1958 :     cannot have client pseudo-ops in the TEXT segment.
1959 :    
1960 :     Because no segment is associated with these declarations it is
1961 :     an error to allocate any space or objects before the first segment
1962 :     directive and an exception will be raised. However, we cannot make
1963 :     this check for client pseudo-ops.
1964 :    
1965 :     These top level declarations are a field in the CFG graph_info.
1966 :     In theory you can continue to add to this field after the CFG has been
1967 :     built -- provided you know what you are doing;-)
1968 :    
1969 :     ----------------------------------------------------------------------
1970 : blume 1175 Name: Matthias Blume
1971 : blume 1190 Date: 2002/05/13 16:40:00 EDT
1972 :     Tag: blume-20020513-pp-etc
1973 :     Description:
1974 :    
1975 :     A few minor bugfixes:
1976 :    
1977 :     - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1978 :     (Bogus printouts for redefined bindings still occur. Compiler
1979 :     bug should no longer occur now. We need to redo the prettyprinter
1980 :     from scratch.)
1981 :    
1982 :     - CM pathname printer now also adds escape sequences for ( and )
1983 :    
1984 :     - commend and docu fixes for ml-nlffi
1985 :    
1986 :     ----------------------------------------------------------------------
1987 :     Name: Matthias Blume
1988 : blume 1189 Date: 2002/05/10 16:40:00 EDT
1989 :     Tag: blume-20020510-erg-textio
1990 :     Description:
1991 :    
1992 :     Applied the following bugfix provided by Emden Gansner:
1993 :    
1994 :     Output is corrupted when outputSubstr is used rather than output.
1995 :    
1996 :     The problem occurs when a substring
1997 :    
1998 :     ss = (s, dataStart, dataLen)
1999 :    
2000 :     where dataStart > 0, fills a stream buffer with avail bytes left.
2001 :     avail bytes of s, starting at index dataStart, are copied into the
2002 :     buffer, the buffer is flushed, and then the remaining dataLen-avail
2003 :     bytes of ss are copied into the beginning of the buffer. Instead of
2004 :     starting this copy at index dataStart+avail in s, the current code
2005 :     starts the copy at index avail.
2006 :    
2007 :     Fix:
2008 :     In text-io-fn.sml, change line 695 from
2009 :     val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
2010 :     to
2011 :     val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
2012 :    
2013 :     ----------------------------------------------------------------------
2014 :     Name: Matthias Blume
2015 : blume 1186 Date: 2002/04/12 13:55:00 EDT
2016 :     Tag: blume-20020412-assyntax
2017 :     Description:
2018 :    
2019 :     1. Grabbed newer assyntax.h from the XFree86 project.
2020 :     2. Fiddled with how to compile X86.prim.asm without warnings.
2021 :     3. (Very) Minor cleanup in CM.
2022 :    
2023 :     ----------------------------------------------------------------------
2024 :     Name: Matthias Blume
2025 : blume 1185 Date: 2002/04/01 (no joke!) 17:07:00 EST
2026 :     Tag: blume-20020401-x86div
2027 :     Description:
2028 :    
2029 :     Added full support for div/mod/rem/quot on the x86, using the machine
2030 :     instruction's two results (without clumsily recomputing the remainder)
2031 :     directly where appropriate.
2032 :    
2033 :     Some more extensive power-of-two support was added to the x86 instruction
2034 :     selector (avoiding expensive divs, mods, and muls where they can be
2035 :     replaced with cheaper shifts and masks). However, this sort of thing
2036 :     ought to be done earlier, e.g., within the CPS optimizer so that
2037 :     all architectures benefit from it.
2038 :    
2039 :     The compiler compiles to a fixed point, but changes might be somewhat
2040 :     fragile nevertheless. Please, report any strange things that you might
2041 :     see wrt. div/mod/quot/rem...
2042 :    
2043 :     ----------------------------------------------------------------------
2044 :     Name: Matthias Blume
2045 : blume 1184 Date: 2002/03/29 17:22:00
2046 :     Tag: blume-20020329-div
2047 :     Description:
2048 :    
2049 :     Fixed my broken div/mod logic. Unfortunately, this means that the
2050 :     inline code for div/mod now has one more comparison than before.
2051 :     Fast paths (quotient > 0 or remainder = 0) are not affected, though.
2052 :     The problem was with quotient = 0, because that alone does not tell
2053 :     us which way the rounding went. One then has to look at whether
2054 :     remainder and divisor have the same sign... :(
2055 :    
2056 :     Anyway, I replaced the bootfiles with fresh ones...
2057 :    
2058 :     ----------------------------------------------------------------------
2059 :     Name: Matthias Blume
2060 : blume 1183 Date: 2002/03/29 14:10:00 EST
2061 :     Tag: blume-20020329-inlprims
2062 :     Description:
2063 :    
2064 :     NEW BOOTFILES!!! Version number bumped to 110.39.3.
2065 :    
2066 :     Primops have changed. This means that the bin/boot-file formats have
2067 :     changed as well.
2068 :    
2069 :     To make sure that there is no confusion, I made a new version.
2070 :    
2071 :    
2072 :     CHANGES:
2073 :    
2074 :     * removed REMT from mltree (remainder should never overflow).
2075 :    
2076 :     * added primops to deal with divisions of all flavors to the frontend
2077 :    
2078 :     * handled these primops all the way through so they map to their respective
2079 :     MLRISC support
2080 :    
2081 :     * used these primops in the implementation of Int, Int32, Word, Word32
2082 :    
2083 :     * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
2084 :    
2085 :     * parameterized INLMIN, INLMAX, and INLABS by a numkind
2086 :    
2087 :     * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
2088 :     floating point
2089 :    
2090 :     * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
2091 :     and Real (but Real.abs maps to a separate floating-point-only primop)
2092 :    
2093 :    
2094 :     TODO items:
2095 :    
2096 :     * Hacked Alpha32 instruction selection, disabling the selection of REMx
2097 :     instructions because the machine instruction encoder cannot handle
2098 :     them. (Hppa, PPC, and Sparc instruction selection did not handle
2099 :     REM in the first place, and REM is supported by the x86 machine coder.)
2100 :    
2101 :     * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
2102 :     selection phase. (The two can be streamlined because the hardware
2103 :     delivers both quotient and remainder at the same time anyway.)
2104 :    
2105 :     * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
2106 :     (Currently the behavior is inconsistent both across architectures and
2107 :     wrt. the draft Basis spec.)
2108 :    
2109 :     * Word8 should eventually be handled natively, too.
2110 :    
2111 :     * There seems to be one serious bug in mltree-gen.sml. It appears, though,
2112 :     as if there currently is no execution path that could trigger it in
2113 :     SML/NJ. (The assumptions underlying functions arith and promotable do not
2114 :     hold for things like multiplication and division.)
2115 :    
2116 :     ----------------------------------------------------------------------
2117 :     Name: Matthias Blume
2118 : blume 1181 Date: 2002/03/27 16:27:00 EST
2119 :     Tag: blume-20020327-mlrisc-divisions
2120 :     Description:
2121 :    
2122 :     Added support for all four division operations (ML's div, mod, quot,
2123 :     and rem) to MLRISC. In the course of doing so, I also rationalized
2124 :     the naming (no more annoying switch-around of DIV and QUOT), by
2125 :     parameterizing the operation by div_rounding_mode (which can be either
2126 :     DIV_TO_ZERO or DIV_TO_NEGINF).
2127 :    
2128 :     The generic MLTreeGen functor takes care of compiling all four
2129 :     operations down to only round-to-zero div.
2130 :    
2131 :     Missing pieces:
2132 :    
2133 :     * Doing something smarter than relying on MLTreeGen on architectures
2134 :     like, e.g., the x86 where hardware division delivers both quotient and
2135 :     remainder at the same time. With this, the implementation of the
2136 :     round-to-neginf operations could be further streamlined.
2137 :    
2138 :     * Remove inlining support for div/mod/rem from the frontend and replace it
2139 :     with primops that get carried through to the backend. Do this for all
2140 :     int and word types.
2141 :    
2142 :     ----------------------------------------------------------------------
2143 :     Name: Matthias Blume
2144 : blume 1180 Date: 2002/03/25 17:25:00 EST
2145 :     Tag: blume-20020325-divmod
2146 :     Description:
2147 :    
2148 :     I improved (hopefully without breaking them) the implementation of Int.div,
2149 :     Int.mod, and Int.rem. For this, the code in translate.sml now takes
2150 :     advantage of the following observations:
2151 :    
2152 :     Let q = x quot y r = x rem y
2153 :     d = x div y m = x mod y
2154 :    
2155 :     where "quot" is the round-to-zero version of integer division that
2156 :     hardware usually provides. Then we have:
2157 :    
2158 :     r = x - q * y where neither the * nor the - will overflow
2159 :     d = if q >= 0 orelse x = q * y then q else q - 1
2160 :     where neither the * nor the - will overflow
2161 :     m = if q >= 0 orelse r = 0 then r else r + y
2162 :     where the + will not overflow
2163 :    
2164 :     This results in substantial simplification of the generated code.
2165 :     The following table shows the number of CFG nodes and edges generated
2166 :     for
2167 :     fun f (x, y) = x OPER y
2168 :     (* with OPER \in div, mod, quot, rem *)
2169 :    
2170 :    
2171 :     OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
2172 :     --------------------------------------------------------
2173 :     div | 24 | 39 | 12 | 16
2174 :     mod | 41 | 71 | 12 | 16
2175 :     quot | 8 | 10 | 8 | 10
2176 :     rem | 10 | 14 | 8 | 10
2177 :    
2178 :    
2179 :     ----------------------------------------------------------------------
2180 :     Name: Matthias Blume
2181 : blume 1179 Date: 2002/03/25 22:06:00 EST
2182 :     Tag: blume-20020325-cprotobug
2183 :     Description:
2184 :    
2185 :     Fixed a bug in cproto (c prototype decoder).
2186 :    
2187 :     ----------------------------------------------------------------------
2188 :     Name: Matthias Blume
2189 : blume 1178 Date: 2002/03/25 16:00:00 EST
2190 :     Tag: blume-20020325-raw-primops
2191 :     Description:
2192 :    
2193 :     I did some cleanup to Allen's new primop code and
2194 :     replaced yesterday's bootfiles with new ones.
2195 :     (But they are stored in the same place.)
2196 :    
2197 :     ----------------------------------------------------------------------
2198 :     Name: Matthias Blume
2199 : blume 1175 Date: 2002/03/24 22:40:00 EST
2200 :     Tag: blume-20020324-bootfiles
2201 :     Description:
2202 :    
2203 :     Made the bootfiles that Allen asked for.
2204 :    
2205 :     ----------------------------------------------------------------------
2206 : leunga 1174 Name: Allen Leung
2207 :     Date: 2002/03/23 15:50:00 EST
2208 :     Tag: leunga-20020323-flint-cps-rcc-primops
2209 :     Description:
2210 :    
2211 :     1. Changes to FLINT primops:
2212 :    
2213 :     (* make a call to a C-function;
2214 :     * The primop carries C function prototype information and specifies
2215 :     * which of its (ML-) arguments are floating point. C prototype
2216 :     * information is for use by the backend, ML information is for
2217 :     * use by the CPS converter. *)
2218 :     | RAW_CCALL of { c_proto: CTypes.c_proto,
2219 :     ml_args: ccall_type list,
2220 :     ml_res_opt: ccall_type option,
2221 :     reentrant : bool
2222 :     } option
2223 :     (* Allocate uninitialized storage on the heap.
2224 :     * The record is meant to hold short-lived C objects, i.e., they
2225 :     * are not ML pointers. With the tag, the representation is
2226 :     * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
2227 :     *)
2228 :     | RAW_RECORD of {tag:bool,sz:int}
2229 :     and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
2230 :    
2231 :     2. These CPS primops are now overloaded:
2232 :    
2233 :     rawload of {kind:numkind}
2234 :     rawstore of {kind:numkind}
2235 :    
2236 :     The one argument form is:
2237 :    
2238 :     rawload {kind} address
2239 :    
2240 :     The two argument form is:
2241 :    
2242 :     rawload {kind} [ml object, byte-offset]
2243 :    
2244 :     3. RAW_CCALL/RCC now takes two extra arguments:
2245 :    
2246 :     a. The first is whether the C call is reentrant, i.e., whether
2247 :     ML state should be saved and restored.
2248 :     b. The second argument is a string argument specifying the name of
2249 :     library and the C function.
2250 :    
2251 :     These things are currently not handled in the code generator, yet.
2252 :    
2253 :     4. In CProto,
2254 :    
2255 :     An encoding type of "bool" means "ml object" and is mapped into
2256 :     C prototype of PTR. Note that "bool" is different than "string",
2257 :     even though "string" is also mapped into PTR, because "bool"
2258 :     is assigned an CPS type of BOGt, while "string" is assigned INT32t.
2259 :    
2260 :     5. Pickler/unpicker
2261 :    
2262 :     Changed to handle RAW_RECORD and newest RAW_CCALL
2263 :    
2264 :     6. MLRiscGen,
2265 :    
2266 :     1. Changed to handle the new rawload/rawstore/rawrecord operators.
2267 :     2. Code for handling C Calls has been moved to a new module CPSCCalls,
2268 :     in the file CodeGen/cpscompile/cps-c-calls.sml
2269 :    
2270 :     7. Added the conditional move operator
2271 :    
2272 :     condmove of branch
2273 :    
2274 :     to cps. Generation of this is still buggy so it is currently
2275 :     disabled.
2276 :    
2277 :     ----------------------------------------------------------------------
2278 : george 1168 Name: Lal George
2279 :     Date: 2002/03/22 14:18:25 EST
2280 : george 1171 Tag: george-20020322-cps-branch-prob
2281 : george 1168 Description:
2282 :    
2283 : george 1171 Implemented the Ball-Larus branch prediction-heuristics, and
2284 : george 1168 incorporated graphical viewers for control flow graphs.
2285 :    
2286 : george 1171 Ball-Larus Heuristics:
2287 : george 1168 ---------------------
2288 :     See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
2289 :    
2290 :     By design it uses the Dempster-Shafer theory for combining
2291 :     probabilities. For example, in the function:
2292 :    
2293 :     fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
2294 :    
2295 :     the ball-larus heuristics predicts that the n=0 is unlikely
2296 :     (OH-heuristic), and the 'then' branch is unlikely because of the
2297 :     RH-heuristic -- giving the 'then' branch an even lower combined
2298 : george 1171 probability using the Dempster-Shafer theory.
2299 : george 1168
2300 :     Finally, John Reppy's loop analysis in MLRISC, further lowers the
2301 :     probability of the 'then' branch because of the loop in the else
2302 :     branch.
2303 :    
2304 :    
2305 :     Graphical Viewing:
2306 :     ------------------
2307 :     I merely plugged in Allen's graphical viewers into the compiler. The
2308 :     additional code is not much. At the top level, saying:
2309 :    
2310 :     Control.MLRISC.getFlag "cfg-graphical-view" := true;
2311 :    
2312 :     will display the graphical view of the control flow graph just before
2313 :     back-patching. daVinci must be in your path for this to work. If
2314 :     daVinci is not available, then the default viewer can be changed
2315 :     using:
2316 :    
2317 :     Control.MLRISC.getString "viewer"
2318 :    
2319 :     which can be set to "dot" or "vcg" for the corresponding viewers. Of
2320 :     course, these viewers must be in your path.
2321 :    
2322 :     The above will display the compilation unit at the level of clusters,
2323 :     many of which are small, boring, and un-interesting. Also setting:
2324 :    
2325 :     Control.MLRISC.getInt "cfg-graphical-view_size"
2326 :    
2327 :     will display clusters that are larger than the value set by the above.
2328 :    
2329 :    
2330 :     ----------------------------------------------------------------------
2331 : blume 1159 Name: Matthias Blume
2332 :     Date: 2002/03/21 22:20:00 EST
2333 :     Tag: blume-20020321-kmp-bugfix
2334 :     Description:
2335 :    
2336 :     Changed the interface to the KMP routine in PreString and fixed
2337 :     a minor bug in one place where it was used.
2338 :    
2339 :     ----------------------------------------------------------------------
2340 : leunga 1156 Name: Allen Leung
2341 : leunga 1158 Date: 2002/03/21 20:30:00 EST
2342 :     Tag: leunga-20020321-cfg
2343 :     Description:
2344 :    
2345 :     Fixed a potential problem in cfg edge splitting.
2346 :    
2347 :     ----------------------------------------------------------------------
2348 :     Name: Allen Leung
2349 : leunga 1156 Date: 2002/03/21 17:15:00 EST
2350 :     Tag: leunga-20020321-x86-fp-cfg
2351 :     Description:
2352 :    
2353 :     1. Recoded the buggy parts of x86-fp.
2354 :    
2355 :     a. All the block reordering code has been removed.
2356 :     We now depend on the block placement phases to do this work.
2357 :    
2358 :     b. Critical edge splitting code has been simplified and moved into the
2359 :     CFG modules, as where they belong.
2360 :    
2361 :     Both of these were quite buggy and complex. The code is now much, much
2362 :     simpler.
2363 :    
2364 :     2. X86 backend.
2365 :    
2366 :     a. Added instructions for 64-bit support. Instruction selection for
2367 :     64-bit has not been committed, however, since that
2368 :     requires changes to MLTREE which haven't been approved by
2369 :     Lal and John.
2370 :    
2371 :     b. Added support for FUCOMI and FUCOMIP when generating code for
2372 :     PentiumPro and above. We only generate these instructions in
2373 :     the fast-fp mode.
2374 :    
2375 :     c. Added cases for JP and JNP in X86FreqProps.
2376 :    
2377 :     3. CFG
2378 :    
2379 :     CFG now has a bunch of methods for edge splitting and merging.
2380 :    
2381 :     4. Machine description.
2382 :    
2383 :     John's simplification of MLTREE_BASIS.fcond broke a few machine
2384 :     description things:
2385 :    
2386 :     rtl-build.{sig,sml} and hppa.mdl fixed.
2387 :    
2388 :     NOTE: the machine description stuff in the repository is still broken.
2389 :     Again, I can't put my fixes in because that involves
2390 :     changes to MLTREE.
2391 :    
2392 :     ----------------------------------------------------------------------
2393 : blume 1145 Name: Matthias Blume
2394 : blume 1155 Date: 2002/03/20 15:55:00 EST
2395 :     Tag: blume-20020320-kmp
2396 :     Description:
2397 :    
2398 :     Implemented Knuth-Morris-Pratt string matching in PreString and used
2399 :     it for String.isSubstring, Substring.isSubstring, and
2400 :     Substring.position.
2401 :    
2402 :     (Might need some stress-testing. Simple examples worked fine.)
2403 :    
2404 :     ----------------------------------------------------------------------
2405 :     Name: Matthias Blume
2406 : blume 1152 Date: 2002/03/19 16:37:00 EST
2407 :     Tag: blume-20020319-witnesses
2408 :     Description:
2409 :    
2410 :     Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
2411 :    
2412 :     This implements a generic mechanism for changing constness qualifiers
2413 :     anywhere within big C types without resorting to outright "casts".
2414 :     (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
2415 :     modify the constness at the outermost level.)
2416 :     The implementation of "convert" is based on the idea of "witness"
2417 :     values -- values that are not used by the operation but whose types
2418 :     "testify" to their applicability. On the implementation side, "convert"
2419 :     is simply a projection (returning its second curried argument). With
2420 :     cross-module inlining, it should not result in any machine code being
2421 :     generated.
2422 :    
2423 :     ----------------------------------------------------------------------
2424 :     Name: Matthias Blume
2425 : blume 1148 Date: 2002/03/15 16:40:00 EST
2426 :     Tag: blume-20020315-basis
2427 :     Description:
2428 :    
2429 :     Provided (preliminary?) implementations for
2430 :    
2431 :     {String,Substring}.{concatWith,isSuffix,isSubstring}
2432 :    
2433 :     and
2434 :    
2435 :     Substring.full
2436 :    
2437 :     Those are in the Basis spec but they were missing in SML/NJ.
2438 :    
2439 :     ----------------------------------------------------------------------
2440 :     Name: Matthias Blume
2441 : blume 1145 Date: 2002/03/14 21:30:00 EST
2442 :     Tag: blume-20020314-controls
2443 :     Description:
2444 :    
2445 :     Controls:
2446 :     ---------
2447 :    
2448 :     1. Factored out the recently-added Controls : CONTROLS stuff and put
2449 :     it into its own library $/controls-lib.cm. The source tree for
2450 :     this is under src/smlnj-lib/Controls.
2451 :    
2452 :     2. Changed the names of types and functions in this interface, so they
2453 :     make a bit more "sense":
2454 :    
2455 :     module -> registry
2456 :     'a registry -> 'a group
2457 :    
2458 :     3. The interface now deals in ref cells only. The getter/setter interface
2459 :     is (mostly) gone.
2460 :    
2461 :     4. Added a function that lets one register an already-existing ref cell.
2462 :    
2463 :     5. Made the corresponding modifications to the rest of the code so that
2464 :     everything compiles again.
2465 :    
2466 :     6. Changed the implementation of Controls.MLRISC back to something closer
2467 :     to the original. In particular, this module (and therefore MLRISC)
2468 :     does not depend on Controls. There now is some link-time code in
2469 :     int-sys.sml that registers the MLRISC controls with the Controls
2470 :     module.
2471 :    
2472 :     CM:
2473 :     ---
2474 :    
2475 :     * One can now specify the lambda-split aggressiveness in init.cmi.
2476 :    
2477 :     ----------------------------------------------------------------------
2478 : leunga 1142 Name: Allen Leung
2479 :     Date: 2002/03/13 17:30:00 EST
2480 :     Tag: leunga-20020313-x86-fp-unary
2481 :     Description:
2482 :    
2483 :     Bug fix for:
2484 :    
2485 :     > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
2486 :     > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
2487 :     > - fun f(x,(y,z)) = Real.~ y;
2488 :     > [autoloading]
2489 :     > [autoloading done]
2490 :     > fchsl (%eax), 184(%esp)
2491 :     > Error: MLRisc bug: X86MCEmitter.emitInstr
2492 :     >
2493 :     > uncaught exception Error
2494 :     > raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
2495 :    
2496 :     The problem was that the code generator did not generate any fp registers
2497 :     in this case, and the ra didn't know that it needed to run the X86FP phase to
2498 :     translate the pseudo fp instruction. This only happened with unary fp
2499 :     operators in certain situations.
2500 :    
2501 :     ----------------------------------------------------------------------
2502 : blume 1137 Name: Matthias Blume
2503 : blume 1140 Date: 2002/03/13 14:00:00 EST
2504 :     Tag: blume-20020313-overload-etc
2505 :     Description:
2506 :    
2507 :     1. Added _overload as a synonym for overload for backward compatibility.
2508 :     (Control.overloadKW must be true for either version to be accepted.)
2509 :    
2510 :     2. Fixed bug in install script that caused more things to be installed
2511 :     than what was requested in config/targets.
2512 :    
2513 :     3. Made CM aware of the (_)overload construct so that autoloading
2514 :     works.
2515 :    
2516 :     ----------------------------------------------------------------------
2517 :     Name: Matthias Blume
2518 : blume 1138 Date: 2002/03/12 22:03:00 EST
2519 :     Tag: blume-20020312-url
2520 :     Description:
2521 :    
2522 :     Forgot to update BOOT and srcarchiveurl.
2523 :    
2524 :     ----------------------------------------------------------------------
2525 :     Name: Matthias Blume
2526 : blume 1137 Date: 2002/03/12 17:30:00 EST
2527 :     Tag: blume-20020312-version110392
2528 :     Description:
2529 :    
2530 :     Yet another version number bump (because of small changes to the
2531 :     binfile format). Version number is now 110.39.2. NEW BOOTFILES!
2532 :    
2533 :     Changes:
2534 :    
2535 :     The new pid generation scheme described a few weeks ago was overly
2536 :     complicated. I implemented a new mechanism that is simpler and
2537 :     provides a bit more "stability": Once CM has seen a compilation
2538 :     unit, it keeps its identity constant (as long as you do not delete
2539 :     those crucial CM/GUID/* files). This means that when you change
2540 : blume 1145 an interface, compile, then go back to the old interface, and
2541 : blume 1137 compile again, you arrive at the original pid.
2542 :    
2543 :     There now also is a mechanism that instructs CM to use the plain
2544 :     environment hash as a module's pid (effectively making its GUID
2545 :     the empty string). For this, "noguid" must be specified as an
2546 :     option to the .sml file in question within its .cm file.
2547 :     This is most useful for code that is being generated by tools such
2548 :     as ml-nlffigen (because during development programmers tend to
2549 :     erase the tool's entire output directory tree including CM's cached
2550 :     GUIDs). "noguid" is somewhat dangerous (since it can be used to locally
2551 :     revert to the old, broken behavior of SML/NJ, but in specific cases
2552 :     where there is no danger of interface confusion, its use is ok
2553 :     (I think).
2554 :    
2555 :     ml-nlffigen by default generates "noguid" annotations. They can be
2556 :     turned off by specifying -guid in its command line.
2557 :    
2558 :     ----------------------------------------------------------------------
2559 : george 1136 Name: Lal George
2560 :     Date: 2002/03/12 12 14:42:36 EST
2561 :     Tag: george-20020312-frequency-computation
2562 :     Description:
2563 :    
2564 :     Integrated jump chaining and static block frequency into the
2565 :     compiler. More details and numbers later.
2566 : leunga 1025
2567 : george 1003 ----------------------------------------------------------------------
2568 : george 1133 Name: Lal George
2569 :     Date: 2002/03/11 11 22:38:53 EST
2570 :     Tag: george-20020311-jump-chain-elim
2571 :     Description:
2572 :    
2573 :     Tested the jump chain elimination on all architectures (except the
2574 :     hppa). This is on by default right now and is profitable for the
2575 :     alpha and x86, however, it may not be profitable for the sparc and ppc
2576 :     when compiling the compiler.
2577 :    
2578 :     The gc test will typically jump to a label at the end of the cluster,
2579 :     where there is another jump to an external cluster containing the actual
2580 :     code to invoke gc. This is to allow factoring of common gc invocation
2581 :     sequences. That is to say, we generate:
2582 :    
2583 :     f:
2584 :     testgc
2585 :     ja L1 % jump if above to L1
2586 :    
2587 :     L1:
2588 :     jmp L2
2589 :    
2590 :    
2591 :     After jump chain elimination the 'ja L1' instructions is converted to
2592 :     'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
2593 :     up being implemented in their long form (if L2 is far away) using:
2594 :    
2595 :     jbe L3 % jump if below or equal to L3
2596 :     jmp L2
2597 :     L3:
2598 :     ...
2599 :    
2600 :    
2601 :     For large compilation units L2 may be far away.
2602 :    
2603 :    
2604 :     ----------------------------------------------------------------------
2605 : blume 1132 Name: Matthias Blume
2606 :     Date: 2002/03/11 13:30:00 EST
2607 :     Tag: blume-20020311-mltreeeval
2608 :     Description:
2609 :    
2610 :     A functor parameter was missing.
2611 :    
2612 :     ----------------------------------------------------------------------
2613 : leunga 1130 Name: Allen Leung
2614 : leunga 1131 Date: 2002/03/11 10:30:00 EST
2615 : leunga 1142 Tag: leunga-20020311-runtime-string0
2616 : leunga 1131 Description:
2617 :    
2618 :     The representation of the empty string now points to a
2619 :     legal null terminated C string instead of unit. It is now possible
2620 :     to convert an ML string into C string with InlineT.CharVector.getData.
2621 :     This compiles into one single machine instruction.
2622 :    
2623 :     ----------------------------------------------------------------------
2624 :     Name: Allen Leung
2625 : leunga 1130 Date: 2002/03/10 23:55:00 EST
2626 :     Tag: leunga-20020310-x86-call
2627 :     Description:
2628 :    
2629 :     Added machine generation for CALL instruction (relative displacement mode)
2630 :    
2631 :     ----------------------------------------------------------------------
2632 : blume 1128 Name: Matthias Blume
2633 :     Date: 2002/03/08 16:05:00
2634 :     Tag: blume-20020308-entrypoints
2635 :     Description:
2636 :    
2637 :     Version number bumped to 110.39.1. NEW BOOTFILES!
2638 :    
2639 :     Entrypoints: non-zero offset into a code object where execution should begin.
2640 :    
2641 :     - Added the notion of an entrypoint to CodeObj.
2642 :     - Added reading/writing of entrypoint info to Binfile.
2643 :     - Made runtime system bootloader aware of entrypoints.
2644 :     - Use the address of the label of the first function given to mlriscGen
2645 :     as the entrypoint. This address is currently always 0, but it will
2646 :     not be 0 once we turn on block placement.
2647 :     - Removed the linkage cluster code (which was The Other Way(tm) of dealing
2648 :     with entry points) from mlriscGen.
2649 :    
2650 :     ----------------------------------------------------------------------
2651 : leunga 1127 Name: Allen Leung
2652 :     Date: 2002/03/07 20:45:00 EST
2653 :     Tag: leunga-20020307-x86-cmov
2654 :     Description:
2655 :    
2656 :     Bug fixes for CMOVcc on x86.
2657 :    
2658 :     1. Added machine code generation for CMOVcc
2659 :     2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
2660 :     3. CMOVcc cannot have an immediate operand as argument.
2661 :    
2662 :     ----------------------------------------------------------------------
2663 : blume 1126 Name: Matthias Blume
2664 :     Date: 2002/03/07 16:15:00 EST
2665 :     Tag: blume-20020307-controls
2666 :     Description:
2667 :    
2668 :     This is a very large but mostly boring patch which makes (almost)
2669 :     every tuneable compiler knob (i.e., pretty much everything under
2670 :     Control.* plus a few other things) configurable via both the command
2671 :     line and environment variables in the style CM did its configuration
2672 :     until now.
2673 :    
2674 :     Try starting sml with '-h' (or, if you are brave, '-H')
2675 :    
2676 :     To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
2677 :     implements the underlying generic mechanism.
2678 :    
2679 :     The interface to some of the existing such facilities has changed somewhat.
2680 :     For example, the MLRiscControl module now provides mkFoo instead of getFoo.
2681 :     (The getFoo interface is still there for backward-compatibility, but its
2682 :     use is deprecated.)
2683 :    
2684 :     The ml-build script passes -Cxxx=yyy command-line arguments through so
2685 :     that one can now twiddle the compiler settings when using this "batch"
2686 :     compiler.
2687 :    
2688 :     TODO items:
2689 :    
2690 :     We should go through and throw out all controls that are no longer
2691 :     connected to anything. Moreover, we should go through and provide
2692 :     meaningful (and correct!) documentation strings for those controls
2693 :     that still are connected.
2694 :    
2695 :     Currently, multiple calls to Controls.new are accepted (only the first
2696 :     has any effect). Eventually we should make sure that every control
2697 :     is being made (via Controls.new) exactly once. Future access can then
2698 :     be done using Controls.acc.
2699 :    
2700 :     Finally, it would probably be a good idea to use the getter-setter
2701 :     interface to controls rather than ref cells. For the time being, both
2702 :     styles are provided by the Controls module, but getter-setter pairs are
2703 :     better if thread-safety is of any concern because they can be wrapped.
2704 :    
2705 :     *****************************************
2706 :    
2707 :     One bug fix: The function blockPlacement in three of the MLRISC
2708 :     backpatch files used to be hard-wired to one of two possibilities at
2709 :     link time (according to the value of the placementFlag). But (I
2710 :     think) it should rather sense the flag every time.
2711 :    
2712 :     *****************************************
2713 :    
2714 :     Other assorted changes (by other people who did not supply a HISTORY entry):
2715 :    
2716 :     1. the cross-module inliner now works much better (Monnier)
2717 :     2. representation of weights, frequencies, and probabilities in MLRISC
2718 :     changed in preparation of using those for weighted block placement
2719 :     (Reppy, George)
2720 :    
2721 :     ----------------------------------------------------------------------
2722 : george 1116 Name: Lal George
2723 : george 1124 Date: 2002/03/07 14:44:24 EST 2002
2724 :     Tag: george-20020307-weighted-block-placement
2725 :    
2726 :     Tested the weighted block placement optimization on all architectures
2727 :     (except the hppa) using AMPL to generate the block and edge frequencies.
2728 :     Changes were required in the machine properties to correctly
2729 :     categorize trap instructions. There is an MLRISC flag
2730 :     "weighted-block-placement" that can be used to enable weighted block
2731 :     placement, but this will be ineffective without block/edge
2732 :     frequencies (coming soon).
2733 :    
2734 :    
2735 :     ----------------------------------------------------------------------
2736 :     Name: Lal George
2737 : george 1116 Date: 2002/03/05 17:24:48 EST
2738 :     Tag: george-20020305-linkage-cluster
2739 :    
2740 : george 1124 In order to support the block placement optimization, a new cluster
2741 :     is generated as the very first cluster (called the linkage cluster).
2742 :     It contains a single jump to the 'real' entry point for the compilation
2743 :     unit. Block placement has no effect on the linkage cluster itself, but
2744 :     all the other clusters have full freedom in the manner in which they
2745 :     reorder blocks or functions.
2746 : george 1116
2747 :     On the x86 the typical linkage code that is generated is:
2748 :     ----------------------
2749 :     .align 2
2750 :     L0:
2751 :     addl $L1-L0, 72(%esp)
2752 : george 1124 jmp L1
2753 : george 1116
2754 :    
2755 :     .align 2
2756 :     L1:
2757 :     ----------------------
2758 :    
2759 :     72(%esp) is the memory location for the stdlink register. This
2760 :     must contain the address of the CPS function being called. In the
2761 : george 1124 above example, it contains the address of L0; before
2762 : george 1116 calling L1 (the real entry point for the compilation unit), it
2763 :     must contain the address for L1, and hence
2764 :    
2765 :     addl $L1-L0, 72(%esp)
2766 :    
2767 : george 1124 I have tested this on all architectures except the hppa.The increase
2768 :     in code size is of course negligible
2769 : george 1116
2770 :     ----------------------------------------------------------------------
2771 : leunga 1115 Name: Allen Leung
2772 :     Date: 2002/03/03 13:20:00 EST
2773 :     Tag: leunga-20020303-mlrisc-tools
2774 :    
2775 :     Added #[ ... ] expressions to mlrisc tools
2776 :    
2777 :     ----------------------------------------------------------------------
2778 : blume 1096 Name: Matthias Blume
2779 : blume 1098 Date: 2002/02/27 12:29:00 EST
2780 :     Tag: blume-20020227-cdebug
2781 :     Description:
2782 :    
2783 :     - made types in structure C and C_Debug to be equal
2784 :     - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
2785 :     - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
2786 :    
2787 :     ----------------------------------------------------------------------
2788 :     Name: Matthias Blume
2789 : blume 1096 Date: 2002/02/26 12:00:00 EST
2790 :     Tag: blume-20020226-ffi
2791 :     Description:
2792 :    
2793 :     1. Fixed a minor bug in CM's "noweb" tool:
2794 :     If numbering is turned off, then truly don't number (i.e., do not
2795 :     supply the -L option to noweb). The previous behavior was to supply
2796 :     -L'' -- which caused noweb to use the "default" line numbering scheme.
2797 :     Thanks to Chris Richards for pointing this out (and supplying the fix).
2798 :    
2799 :     2. Once again, I reworked some aspects of the FFI:
2800 :    
2801 :     A. The incomplete/complete type business:
2802 :    
2803 :     - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
2804 :     gone!
2805 :     - ML types representing an incomplete type are now *equal* to
2806 :     ML types representing their corresponding complete types (just like
2807 :     in C). This is still safe because ml-nlffigen will not generate
2808 :     RTTI for incomplete types, nor will it generate functions that
2809 :     require access to such RTTI. But when ML code generated from both
2810 :     incomplete and complete versions of the C type meet, the ML types
2811 :     are trivially interoperable.
2812 :    
2813 :     NOTE: These changes restore the full generality of the translation
2814 :     (which was previously lost when I eliminated functorization)!
2815 :    
2816 :     B. Enum types:
2817 :    
2818 :     - Structure C now has a type constructor "enum" that is similar to
2819 :     how the "su" constructor works. However, "enum" is not a phantom
2820 :     type because each "T enum" has values (and is isomorphic to
2821 :     MLRep.Signed.int).
2822 :     - There are generic access operations for enum objects (using
2823 :     MLRep.Signed.int).
2824 :     - ml-nlffigen will generate a structure E_foo for each "enum foo".
2825 :     * The structure contains the definition of type "mlrep" (the ML-side
2826 :     representation type of the enum). Normally, mlrep is the same
2827 :     as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
2828 :     then mlrep will be defined as a datatype -- thus facilitating
2829 :     pattern matching on mlrep values.
2830 :     ("-ec" will be suppressed if there are duplicate values in an
2831 :     enumeration.)
2832 :     * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
2833 :     will be generated for each C enum constant xxx.
2834 :     * Conversion functions m2i and i2m convert between mlrep and
2835 :     MLRep.Signed.int. (Without "-ec", these functions are identities.)
2836 :     * Coversion functions c and ml convert between mlrep and "tag enum".
2837 :     * Access functions (get/set) fetch and store mlrep values.
2838 :     - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
2839 :     enumerations are merged into one single enumeration represented by
2840 :     structure E_'.
2841 :    
2842 :     ----------------------------------------------------------------------
2843 : leunga 1080 Name: Allen Leung
2844 : leunga 1094 Date: 2002/02/25 04:45:00 EST
2845 :     Tag: leunga-20020225-cps-spill
2846 :    
2847 :     This is a new implementation of the CPS spill phase.
2848 :     The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
2849 :     In case of problems, replace it with the old file spill.sml
2850 :    
2851 :     The current compiler runs into some serious performance problems when
2852 :     constructing a large record. This can happen when we try to compile a
2853 :     structure with many items. Even a very simple structure like the following
2854 :     makes the compiler slow down.
2855 :    
2856 :     structure Foo = struct
2857 :     val x_1 = 0w1 : Word32.int
2858 :     val x_2 = 0w2 : Word32.int
2859 :     val x_3 = 0w3 : Word32.int
2860 :     ...
2861 :     val x_N = 0wN : Word32.int
2862 :     end
2863 :    
2864 :     The following table shows the compile time, from N=1000 to N=4000,
2865 :     with the old compiler:
2866 :    
2867 :     N
2868 :     1000 CPS 100 spill 0.04u 0.00s 0.00g
2869 :     MLRISC ra 0.06u 0.00s 0.05g
2870 :     (spills = 0 reloads = 0)
2871 :     TOTAL 0.63u 0.07s 0.21g
2872 :    
2873 :     1100 CPS 100 spill 8.25u 0.32s 0.64g
2874 :     MLRISC ra 5.68u 0.59s 3.93g
2875 :     (spills = 0 reloads = 0)
2876 :     TOTAL 14.71u 0.99s 4.81g
2877 :    
2878 :     1500 CPS 100 spill 58.55u 2.34s 1.74g
2879 :     MLRISC ra 5.54u 0.65s 3.91g
2880 :     (spills = 543 reloads = 1082)
2881 :     TOTAL 65.40u 3.13s 6.00g
2882 :    
2883 :     2000 CPS 100 spill 126.69u 4.84s 3.08g
2884 :     MLRISC ra 0.80u 0.10s 0.55g
2885 :     (spills = 42 reloads = 84)
2886 :     TOTAL 129.42u 5.10s 4.13g
2887 :    
2888 :     3000 CPS 100 spill 675.59u 19.03s 11.64g
2889 :     MLRISC ra 2.69u 0.27s 1.38g
2890 :     (spills = 62 reloads = 124)
2891 :     TOTAL 682.48u 19.61s 13.99g
2892 :    
2893 :     4000 CPS 100 spill 2362.82u 56.28s 43.60g
2894 :     MLRISC ra 4.96u 0.27s 2.72g
2895 :     (spills = 85 reloads = 170)
2896 :     TOTAL 2375.26u 57.21s 48.00g
2897 :    
2898 :     As you can see the old cps spill module suffers from some serious
2899 : leunga 1115 performance problem. But since I cannot decipher the old code fully,
2900 :     instead of patching the problems up, I'm reimplementing it
2901 : leunga 1094 with a different algorithm. The new code is more modular,
2902 :     smaller when compiled, and substantially faster
2903 :     (O(n log n) time and O(n) space). Timing of the new spill module:
2904 :    
2905 :     4000 CPS 100 spill 0.02u 0.00s 0.00g
2906 :     MLRISC ra 0.25u 0.02s 0.15g
2907 :     (spills=1 reloads=3)
2908 :     TOTAL 7.74u 0.34s 1.62g
2909 :    
2910 :     Implementation details:
2911 :    
2912 :     As far as I can tell, the purpose of the CPS spill module is to make sure the
2913 :     number of live variables at any program point (the bandwidth)
2914 :     does not exceed a certain limit, which is determined by the
2915 :     size of the spill area.
2916 :    
2917 :     When the bandwidth is too large, we decrease the register pressure by
2918 :     packing live variables into spill records. How we achieve this is
2919 :     completely different than what we did in the old code.
2920 :    
2921 :     First, there is something about the MLRiscGen code generator
2922 :     that we should be aware of:
2923 :    
2924 :     o MLRiscGen performs code motion!
2925 :    
2926 :     In particular, it will move floating point computations and
2927 :     address computations involving only the heap pointer to
2928 :     their use sites (if there is only a single use).
2929 :     What this means is that if we have a CPS record construction
2930 :     statement
2931 :    
2932 :     RECORD(k,vl,w,e)
2933 :    
2934 :     we should never count the new record address w as live if w
2935 :     has only one use (which is often the case).
2936 :    
2937 :     We should do something similar to floating point, but the transformation
2938 :     there is much more complex, so I won't deal with that.
2939 :    
2940 :     Secondly, there are now two new cps primops at our disposal:
2941 :    
2942 :     1. rawrecord of record_kind option
2943 :     This pure operator allocates some uninitialized storage from the heap.
2944 :     There are two forms:
2945 :    
2946 :     rawrecord NONE [INT n] allocates a tagless record of length n
2947 :     rawrecord (SOME rk) [INT n] allocates a tagged record of length n
2948 :     and initializes the tag.
2949 :    
2950 :     2. rawupdate of cty
2951 :     rawupdate cty (v,i,x)
2952 :     Assigns to x to the ith component of record v.
2953 :     The storelist is not updated.
2954 :    
2955 :     We use these new primops for both spilling and increment record construction.
2956 :    
2957 :     1. Spilling.
2958 :    
2959 :     This is implemented with a linear scan algorithm (but generalized
2960 :     to trees). The algorithm will create a single spill record at the
2961 :     beginning of the cps function and use rawupdate to spill to it,
2962 :     and SELECT or SELp to reload from it. So both spills and reloads
2963 :     are fine-grain operations. In contrast, in the old algorithm
2964 :     "spills" have to be bundled together in records.
2965 :    
2966 :     Ideally, we should sink the spill record construction to where
2967 :     it is needed. We can even split the spill record into multiple ones
2968 :     at the places where they are needed. But CPS is not a good
2969 :     representation for global code motion, so I'll keep it simple and
2970 :     am not attempting this.
2971 :    
2972 :     2. Incremental record construction (aka record splitting).
2973 :    
2974 :     Long records with many component values which are simulatenously live
2975 :     (recall that single use record addresses are not considered to
2976 :     be live) are constructed with rawrecord and rawupdate.
2977 :     We allocate space on the heap with rawrecord first, then gradually
2978 :     fill it in with rawupdate. This is the technique suggested to me
2979 :     by Matthias.
2980 :    
2981 :     Some restrictions on when this is applicable:
2982 :     1. It is not a VECTOR record. The code generator currently does not handle
2983 :     this case. VECTOR record uses double indirection like arrays.
2984 :     2. All the record component values are defined in the same "basic block"
2985 :     as the record constructor. This is to prevent speculative
2986 :     record construction.
2987 :    
2988 :     ----------------------------------------------------------------------
2989 :     Name: Allen Leung
2990 : leunga 1086 Date: 2002/02/22 01:02:00 EST
2991 :     Tag: leunga-20020222-mlrisc-tools
2992 :    
2993 :     Minor bug fixes in the parser and rewriter
2994 :    
2995 :     ----------------------------------------------------------------------
2996 :     Name: Allen Leung
2997 : leunga 1085 Date: 2002/02/21 20:20:00 EST
2998 :     Tag: leunga-20020221-peephole
2999 :    
3000 :     Regenerated the peephole files. Some contained typos in the specification
3001 :     and some didn't compile because of pretty printing bugs in the old version
3002 :     of 'nowhere'.
3003 :    
3004 :     ----------------------------------------------------------------------
3005 :     Name: Allen Leung
3006 : leunga 1079 Date: 2002/02/19 20:20:00 EST
3007 :     Tag: leunga-20020219-mlrisc-tools
3008 :     Description:
3009 :    
3010 :     Minor bug fixes to the mlrisc-tools library:
3011 :    
3012 :     1. Fixed up parsing colon suffixed keywords
3013 :     2. Added the ability to shut the error messages up
3014 :     3. Reimplemented the pretty printer and fixed up/improved
3015 :     the pretty printing of handle and -> types.
3016 :     4. Fixed up generation of literal symbols in the nowhere tool.
3017 :     5. Added some SML keywords to to sml.sty
3018 :    
3019 :     ----------------------------------------------------------------------
3020 :     Name: Matthias Blume
3021 : blume 1078 Date: 2002/02/19 16:20:00 EST
3022 :     Tag: blume-20020219-cmffi
3023 :     Description:
3024 :    
3025 :     A wild mix of changes, some minor, some major:
3026 :    
3027 :     * All C FFI-related libraries are now anchored under $c:
3028 :     $/c.cm --> $c/c.cm
3029 :     $/c-int.cm --> $c/internals/c-int.cm
3030 :     $/memory.cm --> $c/memory/memory.cm
3031 :    
3032 :     * "make" tool (in CM) now treats its argument pathname slightly
3033 :     differently:
3034 :     1. If the native expansion is an absolute name, then before invoking
3035 :     the "make" command on it, CM will apply OS.Path.mkRelative
3036 :     (with relativeTo = OS.FileSys.getDir()) to it.
3037 :     2. The argument will be passed through to subsequent phases of CM
3038 :     processing without "going native". In particular, if the argument
3039 :     was an anchored path, then "make" will not lose track of that anchor.
3040 :    
3041 :     * Compiler backends now "know" their respective C calling conventions
3042 :     instead of having to be told about it by ml-nlffigen. This relieves
3043 :     ml-nlffigen from one of its burdens.
3044 :    
3045 :     * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
3046 :    
3047 :     * Export C_DEBUG and C_Debug from $c/c.cm.
3048 :    
3049 :     * C type encoding in ml-nlffi-lib has been improved to model the conceptual
3050 :     subtyping relationship between incomplete pointers and their complete
3051 :     counterparts. For this, ('t, 'c) ptr has been changed to 'o ptr --
3052 :     with the convention of instantiating 'o with ('t, 'c) obj whenever
3053 :     the pointer target type is complete. In the incomplete case, 'o
3054 :     will be instantiated with some "'c iobj" -- a type obtained by
3055 :     using one of the functors PointerToIncompleteType or PointerToCompleteType.
3056 :    
3057 :     Operations that work on both incomplete and complete pointer types are
3058 :     typed as taking an 'o ptr while operations that require the target to
3059 :     be known are typed as taking some ('t, 'c) obj ptr.
3060 :    
3061 :     voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
3062 :     where void is an eqtype without any values. This makes it possible
3063 :     to work on voidptr values using functions meant to operate on light
3064 :     incomplete pointers.
3065 :    
3066 :     * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
3067 :     been vastly simplified.
3068 :    
3069 :     ----------------------------------------------------------------------
3070 :     Name: Matthias Blume
3071 : blume 1076 Date: 2002/02/19 10:48:00 EST
3072 :     Tag: blume-20020219-pqfix
3073 :     Description:
3074 :    
3075 :     Applied Chris Okasaki's bug fix for priority queues.
3076 :    
3077 :     ----------------------------------------------------------------------
3078 :     Name: Matthias Blume
3079 : blume 1073 Date: 2002/02/15 17:05:00
3080 : blume 1069 Tag: Release_110_39
3081 :     Description:
3082 :    
3083 : blume 1073 Last-minute retagging is becoming a tradition... :-(
3084 :    
3085 :     This is the working release 110.39.
3086 :    
3087 :     ----------------------------------------------------------------------
3088 :     Name: Matthias Blume
3089 :     Date: 2002/02/15 16:00:00 EST
3090 :     Tag: Release_110_39-orig
3091 :     Description:
3092 :    
3093 : blume 1069 Working release 110.39. New bootfiles.
3094 :    
3095 : blume 1073 (Update: There was a small bug in the installer so it wouldn't work
3096 :     with all shells. So I retagged. -Matthias)
3097 :    
3098 : blume 1069 ----------------------------------------------------------------------
3099 :     Name: Matthias Blume
3100 : blume 1068 Date: 2002/02/15 14:17:00 EST
3101 :     Tag: blume-20020215-showbindings
3102 :     Description:
3103 :    
3104 :     Added EnvRef.listBoundSymbols and CM.State.showBindings. Especially
3105 :     the latter can be useful for exploring what bindings are available at
3106 :     the interactive prompt. (The first function returns only the list
3107 :     of symbols that are really bound, the second prints those but also the
3108 :     ones that CM's autoloading mechanism knows about.)
3109 :    
3110 :     ----------------------------------------------------------------------
3111 :     Name: Matthias Blume
3112 : blume 1067 Date: 2002/02/15 12:08:00 EST
3113 :     Tag: blume-20020215-iptrs
3114 :     Description:
3115 :    
3116 :     Two improvements to ml-nlffigen:
3117 :    
3118 :     1. Write files only if they do not exist or if their current contents
3119 :     do not coincide with what's being written. (That is, avoid messing
3120 :     with the time stamps unless absolutely necessary.)
3121 :    
3122 :     2. Implement a "repository" mechanism for generated files related
3123 :     to "incomplete pointer types". See the README file for details.
3124 :    
3125 :     ----------------------------------------------------------------------
3126 :     Name: Matthias Blume
3127 : blume 1066 Date: 2002/02/14 11:50:00 EST
3128 :     Tag: blume-20020214-quote
3129 :     Description:
3130 :    
3131 :     Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm). This is required
3132 :     because of the new and improved tag generation scheme. (Thanks to Allen
3133 :     Leung for pointing it out.)
3134 :    
3135 :     ----------------------------------------------------------------------
3136 : george 1065 Name: Lal George
3137 :     Date: 2002/02/14 09:55:27 EST 2002
3138 :     Tag: george-20020214-isabelle-bug
3139 :     Description:
3140 :    
3141 :     Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
3142 :     of Isabelle on the x86.
3143 :    
3144 :     From Allen:
3145 :     -----------
3146 :     I've found the problem:
3147 :    
3148 :     in ra-core.sml, I use the counter "blocked" to keep track of the
3149 :     true number of elements in the freeze queue. When the counter goes
3150 :     to zero, I skip examining the queue. But I've messed up the
3151 :     bookkeeping in combine():
3152 :    
3153 :     else ();
3154 :     case !ucol of
3155 :     PSEUDO => (if !cntv > 0 then
3156 :     (if !cntu > 0 then blocked := !blocked - 1 else ();
3157 :     ^^^^^^^^^^^^^^^^^^^^^^^
3158 :     moveu := mergeMoveList(!movev, !moveu)
3159 :     )
3160 :     else ();
3161 :    
3162 :     combine() is called to coalesce two nodes u and v.
3163 :     I think I was thinking that if the move counts of u and v are both
3164 :     greater than zero then after they are coalesced then one node is
3165 :     removed from the freeze queue. Apparently I was thinking that
3166 :     both u and v are of low degree, but that's clearly not necessarily true.
3167 :    
3168 :    
3169 :     02/12/2002:
3170 :     Here's the patch. HOL now compiles.
3171 :    
3172 :     I don't know how this impact on performance (compile
3173 :     time or runtime). This bug caused the RA (especially on the x86)
3174 :     to go thru the potential spill phase when there are still nodes on the
3175 :     freeze queue.
3176 :    
3177 :    
3178 :    
3179 :    
3180 :     ----------------------------------------------------------------------
3181 : blume 1058 Name: Matthias Blume
3182 : blume 1064 Date: 2002/02/13 22:40:00 EST
3183 :     Tag: blume-20020213-fptr-rtti
3184 :     Description:
3185 :    
3186 :     Fixed a bug in ml-nlffigen that was introduced with one of the previous
3187 :     updates.
3188 :    
3189 :     ----------------------------------------------------------------------
3190 :     Name: Matthias Blume
3191 : blume 1063 Date: 2002/02/13 16:41:00 EST
3192 :     Tag: blume-20020213-cmlpq
3193 :     Description:
3194 :    
3195 :     Added new priority queue export symbols (which have just been added to
3196 :     smlnj-lib.cm) to CML's version of smlnj-lib.cm. (Otherwise CML would
3197 :     not compile and the installer would choke.)
3198 :    
3199 :     ----------------------------------------------------------------------
3200 :     Name: Matthias Blume
3201 : blume 1062 Date: 2002/02/13 16:15:00 EST
3202 :     Tag: blume-20020213-various
3203 :     Description:
3204 :    
3205 :     1. More tweaks to ml-nlffigen:
3206 :    
3207 :     - better internal datastructures (resulting in slight speedup)
3208 :     - "-match" option requires exact match
3209 :     - "localized" gensym counters (untagged structs/unions nested within
3210 :     other structs/unions or within typedefs get a fresh counter; their
3211 :     tag will be prefixed by a concatenation of their parents' tags)
3212 :     - bug fixes (related to calculation of transitive closure of types
3213 :     to be included in the output)
3214 :    
3215 :     2. Minor Basis updates:
3216 :    
3217 :     - added implementations for List.collate and Option.app
3218 :    
3219 :     ----------------------------------------------------------------------
3220 :     Name: Matthias Blume
3221 : blume 1060 Date: 2002/02/11 15:55:00 EST
3222 :     Tag: blume-20020211-gensym
3223 :     Description:
3224 :    
3225 :     Added a "-gensym" option to command line of ml-nlffigen. This can be
3226 :     used to specify a "stem" -- a string that is inserted in all "gensym'd"
3227 :     names (ML structure names that correspond to unnamed C structs, unions,
3228 :     and enums), so that separate runs of ml-nlffigen do not clash.
3229 :    
3230 :     ----------------------------------------------------------------------
3231 :     Name: Matthias Blume
3232 : blume 1059 Date: 2002/02/11 12:05:00 EST
3233 :     Tag: blume-20020211-gensml
3234 :     Description:
3235 :    
3236 :     A quick fix for a problem with GenSML (in the pgraph-util library):
3237 :     Make generation of toplevel "local" optional. (Strictly speaking,
3238 :     signature definitions within "local" are not legal SML.)
3239 :    
3240 :     Other than that: updates to INSTALL and cm/TODO.
3241 :    
3242 :     ----------------------------------------------------------------------
3243 :     Name: Matthias Blume
3244 : blume 1058 Date: 2002/02/08 15:00:00 EST
3245 :     Tag: blume-20020208-uniquepid
3246 :     Description:
3247 :    
3248 :     0. Version number has been bumped to 110.38.1. NEW BOOTFILES!!!
3249 :    
3250 :     1. The installer (config/install.sh) has gotten smarter:
3251 :    
3252 :     - Configuration options are a bit easier to specify now
3253 :     (in config/targets).
3254 :     - Bug in recognizing .tar.bz2 files fixed.
3255 :     - Installer automatically resolves dependencies between
3256 :     configuration options (e.g., if you ask for eXene, you will
3257 :     also get cml -- regardless whether you asked for it or not).
3258 :     - Installer can run in "quieter mode" by setting the environment
3259 :     variable INSTALL_QUIETLY to "true". "Quieter" does not mean
3260 :     "completely silent", though.
3261 :     - Build HashCons library as part of smlnj-lib.
3262 :    
3263 :     2. A new scheme for assigning persistent identifiers to compilation
3264 :     units (and, by extension, to types etc.) has been put into place.
3265 :     This fixes a long-standing bug where types and even dynamic values
3266 :     can get internally confused, thereby compromising type safety
3267 :     (abstraction) and dynamic correctness. See
3268 :    
3269 :     http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
3270 :    
3271 :     for an example of how things could go wrong until now.
3272 :    
3273 :     The downside of the new scheme is that pids are not quite as
3274 :     persistent as they used to be: CM will generate a fresh pid
3275 :     for every compilation unit that it thinks it sees for the first
3276 :     time. That means that if you compile starting from a clean, fresh
3277 :     source tree at two different times, you end up with different
3278 :     binaries.
3279 :    
3280 :     Cutoff recompilation, however, has not been compromised because
3281 :     CM keeps pid information in special caches between runs.
3282 :    
3283 :     ----------------------------------------------------------------------
3284 : george 1053 Name: Lal George
3285 : george 1055 Date: 2002/02/07 15:34:13 EST 2002
3286 :     Tag: <none>
3287 :     Description:
3288 :    
3289 :     Compilers that generate assembly code may produce global labels
3290 :     whose value is resolved at link time. The various peephole optimization
3291 :     modules did not take this in account.
3292 :    
3293 :     TODO. The Labels.addrOf function should really return an option
3294 :     type so that clients are forced to deal with this issue, rather
3295 :     than an exception being raised.
3296 :    
3297 :     ----------------------------------------------------------------------
3298 :     Name: Lal George
3299 : george 1053 Date: 2002/02/06 13:55:02 EST
3300 :     Tag: george-20020206-ra-breakup
3301 :     Description:
3302 :    
3303 :     1. A bug fix from Allen.
3304 :    
3305 :     A typo causes extra fstp %st(0)'s to be generated at compensation
3306 :     edges, which might cause stack underflow traps at runtime. This
3307 :     occurs in fft where there are extraneous fstps right before the 'into'
3308 :     trap instruction (in this case they are harmless since none of the
3309 :     integers overflow.)
3310 :    
3311 : george 1054 2. Pulled out various utility modules that were embedded in the modules
3312 : george 1053 of the register allocator. I need these modules for other purposes, but
3313 : george 1054 they are not complete enough to put into a library (just yet).
3314 : george 1053 ----------------------------------------------------------------------
3315 : blume 1049 Name: Matthias Blume
3316 :     Date: 2002/01/31 16:05:00 EST
3317 :     Tag: blume-20020131-sparc-ccalls
3318 :     Description:
3319 :    
3320 :     1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
3321 :     of extra stack space by mistake. Fixed.
3322 :    
3323 :     2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
3324 :    
3325 :     ----------------------------------------------------------------------
3326 : leunga 1048 Name: Allen Leung
3327 :     Date: 2002/01/30
3328 :     Tag: leunga-20020130-nowhere-bug-fix
3329 :     Description:
3330 :    
3331 :     MLRISC bug fixes:
3332 :     1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
3333 :     2. MachineInt.fromString was negating its value.
3334 :    
3335 :     ----------------------------------------------------------------------
3336 : blume 1039 Name: Matthias Blume
3337 : blume 1047 Date: 2002/01/29
3338 :     Tag: blume-20020129-INSTALL
3339 :     Description:
3340 :    
3341 :     - Added somewhat detailed installation instructions (file INSTALL).
3342 :     - Fixed curl-detection bug in config/install.sh.
3343 :     - It is now possible to select the URL getter using the URLGETTER
3344 :     environment variable:
3345 :    
3346 :     not set / "unknown" --> automatic detection (script tries wget,
3347 :     curl, and lynx)
3348 :     "wget" / "curl" / "lynx" --> use the specified program (script "knows"
3349 :     how to properly invoke them)
3350 :     other --> use $URLGETTER directly, it must take
3351 :     precisely two command-line arguments
3352 :     (source URL and destination file name)
3353 :    
3354 :     ----------------------------------------------------------------------
3355 :     Name: Matthias Blume
3356 : blume 1044 Date: 2002/01/28
3357 : blume 1045 Tag: blume-20020128-sparc-ccalls
3358 :     Description:
3359 :    
3360 :     - Fixed problem with calculation of "used" registers in sparc-c-calls.
3361 :     - Make use of the allocParam argument in sparc-c-calls.
3362 :    
3363 :     ----------------------------------------------------------------------
3364 :     Name: Matthias Blume
3365 :     Date: 2002/01/28
3366 : blume 1044 Tag: blume-20020128-allocParam
3367 :     Description:
3368 :    
3369 :     John Reppy: Changes c-calls API to accept client-callback for
3370 :     allocating extra stack space.
3371 :     me: Corresponding changes to mlriscGen (using a dummy argument that
3372 :     does not change the current behavior).
3373 :    
3374 :     ----------------------------------------------------------------------
3375 :     Name: Matthias Blume
3376 : blume 1040 Date: 2002/01/28 12:00:00
3377 :     Tag: Release_110_38
3378 :     Description:
3379 :    
3380 :     This time for real!!!
3381 :    
3382 :     ----------------------------------------------------------------------
3383 :     Name: Matthias Blume
3384 : blume 1039 Date: 2002/01/28 10:56:00 EST
3385 :     Tag: blume-20020128-retraction
3386 :     Description:
3387 :    
3388 :     0. Retracted earlier 110.38. (The Release_110_38 tag has been replaced
3389 :     with blume-Release_110_38-retracted.)
3390 :    
3391 :     1. Fixed a problem with incorrect rounding modes in real64.sml.
3392 :     (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
3393 :    
3394 :     2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
3395 :     and enums fixed. The naming of corresponding ML identifiers should
3396 :     now be consistent again.
3397 :    
3398 :     ----------------------------------------------------------------------
3399 : leunga 1038 Name: Allen Leung
3400 :     Date: 2002/01/27
3401 :     Tag: leunga-20020127-nowhere
3402 :     Description:
3403 :    
3404 :     Added a target called nowhere in the configuration scripts.
3405 :     Enabling this will build the MLRISC 'nowhere' tool (for translating
3406 :     programs with where-clauses into legal SML code) during installation.
3407 :    
3408 :     ----------------------------------------------------------------------
3409 : blume 1036 Name: Matthias Blume
3410 : leunga 1038 Date: 2002/01/25 21:27:00 EST
3411 : blume 1039 Tag: blume-Release_110_38-retracted
3412 : blume 1037 Description:
3413 :    
3414 :     Call it a (working) release! Version is 110.38. Bootfiles are ready.
3415 :    
3416 :     README will be added later.
3417 :    
3418 : blume 1039 !!! NOTE: Re-tagged as blume-Release_110_38-retracted. Original tag
3419 :     (Release_110_38) removed. Reason: Last-minute bug fixes.
3420 :    
3421 : blume 1037 ----------------------------------------------------------------------
3422 :     Name: Matthias Blume
3423 : blume 1036 Date: 2002/01/25
3424 :     Tag: blume-20020125-ffi
3425 :     Description:
3426 :    
3427 :     A large number of tweaks and improvements to ml-nlffi-lib and
3428 :     ml-nlffigen:
3429 :    
3430 :     - ML represenation types have been streamlined
3431 :     - getter and setter functions work with concrete values, not abstract
3432 :     ones where possible
3433 :     - ml-nlffigen command line more flexible (see README file there)
3434 :     - some bugs have been fixed (hopefully)
3435 :    
3436 :     ----------------------------------------------------------------------
3437 : george 1034 Name: Lal George
3438 :     Date: 2002/01/24
3439 :     Tag: george-20020124-risc-ra-interface
3440 :     Description:
3441 :    
3442 :     There is a dramatic simplification in the interface to the
3443 :     register allocator for RISC architectures as a result of making
3444 :     parallel copy instructions explicit.
3445 :    
3446 :     ----------------------------------------------------------------------
3447 : blume 1028 Name: Matthias Blume
3448 : blume 1032 Date: 2002/01/22
3449 :     Tag: blume-20020122-x86-ccalls
3450 :     Description:
3451 :    
3452 :     Bug fix for c-calls on x86 (having to do with how char- and
3453 :     short-arguments are being handled).
3454 :    
3455 :     ----------------------------------------------------------------------
3456 :     Name: Matthias Blume
3457 : blume 1031 Date: 2002/01/21
3458 :     Tag: blume-20020121-ff
3459 :     Description:
3460 :    
3461 :     Another day of fiddling with the FFI...
3462 :    
3463 :     1. Bug fix/workaround: CKIT does not complain about negative array
3464 :     dimensions, so ml-nlffigen has to guard itself against this possibility.
3465 :     (Otherwise a negative dimension would send it into an infinite loop.)
3466 :    
3467 :     2. Some of the abstract types (light objects, light pointers, most "base"
3468 :     types) in structure C are now eqtypes.
3469 :    
3470 :     3. Added constructors and test functions for NULL function pointers.
3471 :    
3472 :     ----------------------------------------------------------------------
3473 :     Name: Matthias Blume
3474 : blume 1028 Date: 2002/01/18
3475 : blume 1030 Tag: blume-20020118-ready-for-new-release
3476 :     Description:
3477 :    
3478 :     Made config/srcarchiveurl point to a new place. (Will provide boot
3479 :     files shortly.)
3480 :    
3481 :     Maybe we christen this to be 110.38?
3482 :    
3483 :     ----------------------------------------------------------------------
3484 :     Name: Matthias Blume
3485 :     Date: 2002/01/18
3486 : blume 1029 Tag: blume-20020118-more-ffifiddle
3487 :     Description:
3488 :    
3489 :     Today's FFI fiddling:
3490 :    
3491 :     - Provided a structure CGetSet with "convenient" versions of C.Get.* and
3492 :     C.Set.* that use concrete (MLRep.*) arguments and results instead
3493 :     of abstract ones.
3494 :    
3495 :     - Provided word-style bit operations etc. for "int" representation
3496 :     types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
3497 :     and Long.
3498 :    
3499 :     ----------------------------------------------------------------------
3500 :     Name: Matthias Blume
3501 :     Date: 2002/01/18
3502 : blume 1028 Tag: blume-20020118-use-x86-fp
3503 :     Description:
3504 :    
3505 :     Now that x86-fast-fp seems to be working, I turned it back on again
3506 :     by default. (Seems to work fine now, even with the FFI.)
3507 :    
3508 :     Other than that, I added some documentation about the FFI to
3509 :     src/ml-nlffigen/README and updated the FFI test examples in
3510 :     src/ml-nlffi-lib/Tests/*.
3511 :    
3512 :     ----------------------------------------------------------------------
3513 : leunga 1025 Name: Allen Leung
3514 :     Date: 2002/01/17
3515 :     Tag: leunga-20020117-x86-fast-fp-call
3516 :     Description:
3517 :    
3518 :     1. Fixed a problem with handling return fp values when x86's fast fp
3519 :     mode is turned on.
3520 :    
3521 :     2. Minor pretty printing fix for cellset. Print %st(0) as %st(0) instead
3522 :     of %f32.
3523 :    
3524 :     3. Added a constructor INT32lit to the ast of MLRISC tools.
3525 :    
3526 :     ----------------------------------------------------------------------
3527 : blume 1021 Name: Matthias Blume
3528 :     Date: 2002/01/16
3529 :     Tag: blume-20020116-ffifiddle
3530 :     Description:
3531 :    
3532 :     More fiddling with the FFI interface:
3533 :    
3534 :     - Make constness 'c instead of rw wherever possible. This eliminates
3535 :     the need for certain explicit coercions. (However, due to ML's
3536 :     value polymorphism, there will still be many cases where explicit
3537 :     coercions are necessary. Phantom types are not the whole answer
3538 :     to modeling a subtyping relationship in ML.)
3539 :    
3540 :     - ro/rw coersions for pointers added. (Avoids the detour through */&.)
3541 :    
3542 :     - "printf" test example added to src/ml-nlffi-lib/Tests. (Demonstrates
3543 :     clumsy workaround for varargs problem.)
3544 :    
3545 :     ----------------------------------------------------------------------
3546 : george 1016 Name: Lal George
3547 :     Date: 2002/01/15
3548 :     Tag: <none>
3549 :     Description:
3550 :    
3551 :     1. Since COPY instructions are no longer native to the architecture,
3552 :     a generic functor can be used to implement the expandCopies function.
3553 :    
3554 :     2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
3555 :     TEXT segment.
3556 :    
3557 :     ----------------------------------------------------------------------
3558 : blume 1011 Name: Matthias Blume
3559 : blume 1015 Date: 2002/01/15
3560 :     Tag: blume-20020115-ffiupdates
3561 :     Description:
3562 :    
3563 :     1. Fix for bug resulting in single-precision float values being returned
3564 :     incorrectly from FFI calls.
3565 :    
3566 :     2. Small modifications to C FFI API:
3567 :    
3568 :     - memory-allocation routines return straight objects (no options)
3569 :     and raise an exception in out-of-memory situations
3570 :     - unsafe extensions to cast between function pointers and pointers
3571 :     from/to ints
3572 :     - added structure C_Debug as an alternative to structure C where
3573 :     pointer-dereferencing (|*| and |*!) always check for null-pointers
3574 :     - added open_lib' to DynLinkage; open_lib' works like open_lib
3575 :     but also takes a (possibly empty) list of existing library handles
3576 :     that the current library depends on
3577 :    
3578 :     ----------------------------------------------------------------------
3579 :     Name: Matthias Blume
3580 : blume 1011 Date: 2002/01/10
3581 :     Tag: blume-20020110-newffigen
3582 :     Description:
3583 :    
3584 :     1. Updates to portable graph code.
3585 :    
3586 :     2. Major update to ml-nlffigen and ml-nlffi-lib. Things are much
3587 :     more scalable now so that even huge interfaces such as the one
3588 :     for GTK compile in finite time and space. :-)
3589 :     See src/ml-nlffigen/README for details on what's new.
3590 :    
3591 :     ----------------------------------------------------------------------
3592 : george 1003 Name: Lal George
3593 : george 1009 Date: 2001/01/09 14:31:35 EST 2002
3594 :     Tag: george-20011206-rm-native-copy
3595 :     Description:
3596 :    
3597 :     Removed the native COPY and FCOPY instructions
3598 :     from all the architectures and replaced it with the
3599 :     explicit COPY instruction from the previous commit.
3600 :    
3601 :     It is now possible to simplify many of the optimizations
3602 :     modules that manipulate copies. This has not been
3603 :     done in this change.
3604 :    
3605 :     ----------------------------------------------------------------------
3606 :     Name: Lal George
3607 : george 1003 Date: 2001/12/06 16:50:13 EST 2001
3608 :     Tag: george-20011206-mlrisc-instruction
3609 :     Description:
3610 : george 824
3611 : george 1003 Changed the representation of instructions from being fully abstract
3612 :     to being partially concrete. That is to say:
3613 :    
3614 :     from
3615 :     type instruction
3616 :    
3617 :     to
3618 :     type instr (* machine instruction *)
3619 :    
3620 :     datatype instruction =
3621 :     LIVE of {regs: C.cellset, spilled: C.cellset}
3622 :     | KILL of {regs: C.cellset, spilled: C.cellset}
3623 :     | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
3624 :     | ANNOTATION of {i: instruction, a: Annotations.annotation}
3625 :     | INSTR of instr
3626 :    
3627 :     This makes the handling of certain special instructions that appear on
3628 :     all architectures easier and uniform.
3629 :    
3630 :     LIVE and KILL say that a list of registers are live or killed at the
3631 :     program point where they appear. No spill code is generated when an
3632 :     element of the 'regs' field is spilled, but the register is moved to
3633 :     the 'spilled' (which is present, more for debugging than anything else).
3634 :    
3635 :     LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
3636 :     We used to generate:
3637 :    
3638 :     DEFFREG f1
3639 :     f1 := f2 + f3
3640 :     trapb
3641 :    
3642 :     but now generate:
3643 :    
3644 :     f1 := f2 + f3
3645 :     trapb
3646 :     LIVE {regs=[f1,f2,f3], spilled=[]}
3647 :    
3648 :     Furthermore, the DEFFREG (hack) required that all floating point instruction
3649 :     use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
3650 :     defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
3651 :     in a cleaner alpha implementation. (Hopefully, intel will not get rid of
3652 :     this architecture).
3653 :    
3654 :     COPYXXX is intended to replace the parallel COPY and FCOPY available on
3655 :     all the architectures. This will result in further simplification of the
3656 :     register allocator that must be aware of them for coalescing purposes, and
3657 :     will also simplify certain aspects of the machine description that provides
3658 :     callbacks related to parallel copies.
3659 :    
3660 :     ANNOTATION should be obvious, and now INSTR represents the honest to God
3661 :     machine instruction set!
3662 :    
3663 :     The <arch>/instructions/<arch>Instr.sml files define certain utility
3664 :     functions for making porting easier -- essentially converting upper case
3665 :     to lower case. All machine instructions (of type instr) are in upper case,
3666 :     and the lower case form generates an MLRISC instruction. For example on
3667 :     the alpha we have:
3668 :    
3669 :     datatype instr =
3670 :     LDA of {r:cell, b:cell, d:operand}
3671 :     | ...
3672 :    
3673 :     val lda : {r:cell, b:cell, d:operand} -> instruction
3674 :     ...
3675 :    
3676 :     where lda is just (INSTR o LDA), etc.
3677 :    
3678 : leunga 815 ----------------------------------------------------------------------
3679 : blume 986 Name: Matthias Blume
3680 : blume 993 Date: 2001/11/22 21:40:00 EST
3681 :     Tag: Release_110_37
3682 :     Description:
3683 :    
3684 :     Release 110.37. This time for real.
3685 :    
3686 :     ----------------------------------------------------------------------
3687 :     Name: Matthias Blume
3688 : blume 988 Date: 2001/11/21 16:35:00 EST
3689 :     Tag: blume-20011121-foot-in-mouth
3690 :     Description:
3691 :    
3692 :     Removed the "Release_110_37" tag because of a serious bug.
3693 :     This will be re-tagged once the bug is fixed.
3694 :    
3695 :     ----------------------------------------------------------------------
3696 :     Name: Matthias Blume
3697 : blume 987 Date: 2001/11/21 16:14:00 EST
3698 :     Tag: blume-20011121-forgottenfile
3699 :     Description:
3700 :    
3701 :     Forgot to add a file. (Just a .tex-file -- part of
3702 :     the CM manual source.)
3703 :    
3704 :     ----------------------------------------------------------------------
3705 :     Name: Matthias Blume
3706 : blume 986 Date: 2001/11/21 16:10:00 EST
3707 : blume 988 Tag: blume-20011121-invalid_110_37
3708 : blume 986 Description:
3709 :    
3710 : blume 988 Note: I removed the original tag "Release_110_37" from this commit
3711 :     because we found a serious bug in all non-x86 backends.
3712 :     - Matthias
3713 :    
3714 : blume 986 1. Modifications to the SML/NJ code generator and to the runtime system
3715 :     so that code object name strings are directly inserted into code
3716 :     objects at code generation time. The only business the runtime system
3717 :     has with this is now to read the name strings on occasions.
3718 :     (The encoding of the name string has also changed somewhat.)
3719 :    
3720 :     2. CM now implements a simple "set calculus" for specifying export lists.
3721 :     In particular, it is now possible to refer to the export lists of
3722 :     other libraries/groups/sources and form unions as well as differences.
3723 :     See the latest CM manual for details.
3724 :    
3725 :     3. An separate notion of "proxy" libraries has again be eliminated from
3726 :     CM's model. (Proxy libraries are now simply a special case of using
3727 :     the export list calculus.)
3728 :    
3729 :     4. Some of the existing libraries now take advantage of the new set
3730 :     calculus.
3731 :     (Notice that not all libraries have been converted because some
3732 :     of the existing .cm-files are supposed to be backward compatible
3733 :     with 110.0.x.)
3734 :    
3735 :     5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
3736 :     "General.exnMessage"! The former relies on a certain hook to be
3737 :     initialized, and that often does not happen in the stand-alone case.)
3738 :    
3739 :     ----------------------------------------------------------------------
3740 : george 984 Name: Lal George
3741 :     Date: 2001/11/21 13:56:18 EST
3742 :     Tag: george-2001121-pseudo-ops
3743 :     Description:
3744 :    
3745 :     Implemented a complete redesign of MLRISC pseudo-ops. Now there
3746 :     ought to never be any question of incompatabilities with
3747 :     pseudo-op syntax expected by host assemblers.
3748 :    
3749 :     For now, only modules supporting GAS syntax are implemented
3750 :     but more should follow, such as MASM, and vendor assembler
3751 :     syntax, e.g. IBM as, Sun as, etc.
3752 :    
3753 :     ----------------------------------------------------------------------
3754 : blume 977 Name: Matthias Blume
3755 :     Date: 2001/11/14 11:52:00 EST
3756 :     Tag: blume-20011114-srcname
3757 :     Description:
3758 :    
3759 :     1. Routed the name of the current source file to mlriscgen where it
3760 :     should be directly emitted into the code object. (This last part
3761 :     is yet to be done.)
3762 :    
3763 :     2. Some cleanup of the pgraph code to make it match the proposal that
3764 :     I put out the other day. (The proposal notwithstanding, things are
3765 :     still in flux here.)
3766 :    
3767 :     ----------------------------------------------------------------------
3768 : george 976 Name: Lal George
3769 :     Date: 2001/11/14 09:44:04 EST
3770 :     Tag:
3771 :     Description:
3772 :    
3773 :     Fix for a backpatching bug reported by Allen.
3774 :    
3775 :     Because the boundary between short and long span-dependent
3776 :     instructions is +/- 128, there are an astounding number of
3777 :     span-dependent instructions whose size is over estimated.
3778 :    
3779 :     Allen came up with the idea of letting the size of span
3780 :     dependent instructions be non-monotonic, for a maxIter
3781 :     number of times, after which the size must be monotonically
3782 :     increasing.
3783 :    
3784 :     This table shows the number of span-dependent instructions
3785 :     whose size was over-estimated as a function of maxIter, for the
3786 :     file Parse/parse/ml.grm.sml:
3787 :    
3788 :     maxIter # of instructions:
3789 :     10 687
3790 :     20 438
3791 :     30 198
3792 :     40 0
3793 :    
3794 :     In compiling the compiler, there is no significant difference in
3795 :     compilation speed between maxIter=10 and maxIter=40. Actually,
3796 :     my measurements showed that maxIter=40 was a tad faster than
3797 :     maxIter=10! Also 96% of the files in the compiler reach a fix
3798 :     point within 13 iterations, so fixing maxIter at 40, while high,
3799 :     is okay.
3800 :    
3801 :     ----------------------------------------------------------------------
3802 : blume 975 Name: Matthias Blume
3803 :     Date: 2001/10/31 15:25:00 EST
3804 :     Tag: blume-20011031-pgraph
3805 :     Description:
3806 :    
3807 :     CKIT:
3808 :     * Changed the "Function" constructor of type Ast.ctype to carry optional
3809 :     argument identifiers.
3810 :     * Changed the return type of TypeUtil.getFunction accordingly.
3811 :     * Type equality ignores the argument names.
3812 :     * TypeUtil.composite tries to preserve argument names but gives up quickly
3813 :     if there is a mismatch.
3814 :    
3815 :     installation script:
3816 :     * attempts to use "curl" if available (unless "wget" is available as well)
3817 :    
3818 :     CM:
3819 :     * has an experimental implementation of "portable graphs" which I will
3820 :     soon propose as an implementation-independent library format
3821 :     * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
3822 :    
3823 :     NLFFI-LIB:
3824 :     * some cleanup (all cosmetic)
3825 :    
3826 :     NLFFIGEN:
3827 :     * temporarily disabled the mechanism that suppresses ML output for
3828 :     C definitions whose identifiers start with an underscore character
3829 :     * generate val bindings for enum constants
3830 :     * user can request that only one style (light or heavy) is being used;
3831 :     default is to use both (command-line arguments: -heavy and -light)
3832 :     * fixed bug in handling of function types involving incomplete pointers
3833 :     * generate ML entry points that take record arguments (i.e., using
3834 :     named arguments) for C functions that have a prototype with named
3835 :     arguments
3836 :     (see changes to CKIT)
3837 :    
3838 :     ----------------------------------------------------------------------
3839 : leunga 972 Name: Allen Leung
3840 :     Date: 2001/10/27 20:34:00 EDT
3841 :     Tag: leunga-20011027-x86-fast-fp-call
3842 :     Description:
3843 :    
3844 :     Fixed the bug described in blume-20010920-slowfp.
3845 :    
3846 :     The fix involves
3847 :     1. generating FCOPYs in FSTP in ia32-svid
3848 :     2. marking a CALL with the appropriate annotation
3849 :    
3850 :     ----------------------------------------------------------------------
3851 : blume 961 Name: Matthias Blume
3852 :     Date: 2001/10/16 11:32:00 EDT
3853 :     Tag: blume-20011016-netbsd
3854 :     Description:
3855 :    
3856 :     Underscore patch from Chris Richards (fixing problem with compiling
3857 :     runtime system under recent NetBSD).
3858 :    
3859 :     ----------------------------------------------------------------------
3860 : george 959 Name: Allen Leung
3861 :     Date: 2001/10/12 17:18:32 EDT 2001
3862 :     Tag: leung-20011012-x86-printflowgraph
3863 :     Description:
3864 :    
3865 :     X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
3866 :    
3867 :     ----------------------------------------------------------------------
3868 : george 952 Name: Lal George
3869 : george 958 Date: 2001/10/11 23:51:34 EDT
3870 :     Tag: george-20011011-too-many-instrs
3871 :     Description:
3872 :    
3873 :     The representation of a program point never expected to see more
3874 :     than 65536 instructions in a basic block!
3875 :    
3876 :     ----------------------------------------------------------------------
3877 :     Name: Lal George
3878 : george 952 Date: 2001/10/09 09:41:37 EDT
3879 :     Tag: george-20011008-mlrisc-labels
3880 :     Description:
3881 :    
3882 :     Changed the machine description files to support printing of
3883 :     local and global labels in assembly code, based on host assembler
3884 :     conventions.
3885 :    
3886 :     ----------------------------------------------------------------------
3887 : blume 916 Name: Matthias Blume
3888 : blume 939 Date: 2001/09/25 15:25:00 EDT
3889 :     Tag: blume-20010925-exninfo
3890 :     Description:
3891 :    
3892 :     I provided a non-hook implementation of exnName (at the toplevel) and
3893 :     made the "dummy" implementation of exnMessage (at the toplevel) more
3894 :     useful: if nothing gets "hooked in", then at least you are going to
3895 :     see the exception name and a message indicating why you don't see more.
3896 :    
3897 :     [For the time being, programs that need exnMessage and want to use
3898 :     ml-build should either use General.exnMessage (strongly recommended) or
3899 :     refer to structure General at some other point so that CM sees a
3900 :     static dependency.]
3901 :    
3902 :     [Similar remarks go for "print" and "use": If you want to use their
3903 :     functionality in stand-alone programs generated by ml-build, then use
3904 :     TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
3905 :    
3906 :     ----------------------------------------------------------------------
3907 :     Name: Matthias Blume
3908 : blume 938 Date: 2001/09/20 17:28:00 EDT
3909 :     Tag: blume-20010920-slowfp
3910 :     Description:
3911 :    
3912 :     Allen says that x86-fast-fp is not safe yet, so I turned it off again...
3913 :    
3914 :     ----------------------------------------------------------------------
3915 :     Name: Matthias Blume
3916 : blume 937 Date: 2001/09/20 17:20:00 EDT
3917 :     Tag: blume-20010920-canonicalpaths
3918 :     Description:
3919 :    
3920 :     0. Updated the BOOT file (something that I forgot to do earlier).
3921 :    
3922 :     1. Small internal change to CM so that it avoids "/../" in filenames
3923 :     as much as possible (but only where it is safe).
3924 :    
3925 :     2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
3926 :     that arguments that contain delimiters are passed through correctly.
3927 :     This change also means that all "special" arguments of the form
3928 :     @SMLxxx... must come first.
3929 :    
3930 :     3. Changed install script to put relative anchor names for tool commands
3931 :     into pathconfig.
3932 :    
3933 :     ----------------------------------------------------------------------
3934 :     Name: Matthias Blume
3935 : blume 932 Date: 2001/09/18 15:35:00 EDT
3936 :     Tag: blume-20010918-readme11036
3937 :     Description:
3938 :    
3939 :     Added README files.
3940 :    
3941 :     ----------------------------------------------------------------------
3942 :     Name: Matthias Blume
3943 : blume 929 Date: 2001/09/18 11:45:00 EDT
3944 :     Tag: Release_110_36 (retag)
3945 :     Description:
3946 :    
3947 :     Fixed mistake in config/preloads. Retagged as 110.36.
3948 :    
3949 :     ----------------------------------------------------------------------
3950 :     Name: Matthias Blume
3951 : blume 928 Date: 2001/09/18 09:40:00 EDT
3952 : blume 929 Tag: Release_110_36_orig (tag changed)
3953 : blume 928 Description:
3954 :    
3955 :     New version (110.36). New bootfiles.
3956 :    
3957 :     ----------------------------------------------------------------------
3958 :     Name: Matthias Blume
3959 : blume 927 Date: 2001/09/14 16:15:00 EDT
3960 :     Tag: blume-20010914-x86fastfp
3961 :     Description:
3962 :    
3963 :     John committed some changes that Allen made, in particular a (hopefully)
3964 :     correctly working version of the x86-fp module.
3965 :    
3966 :     I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
3967 :     flag to "true". Everything seems to compile to a fixpoint ok, and
3968 :     "mandelbrot" speeds up by about 15%.
3969 :    
3970 :     ----------------------------------------------------------------------
3971 :     Name: Matthias Blume
3972 : blume 923 Date: 2001/09/13 11:20:00 EDT
3973 :     Tag: blume-20010913-minimal
3974 :     Description:
3975 :    
3976 :     1. Stefan Monnier's patch to fix a miscompilation problem that
3977 :     was brought to light by John Reppy's work on Moby.
3978 :    
3979 :     2. Implemented a minimal "structure Compiler" that contains just
3980 :     "version" and "architecture". The minimal version will be
3981 :     available when the full version is not. This is for backward-
3982 :     compatibility with code that wants to test Compiler.version.
3983 :    
3984 :     ----------------------------------------------------------------------
3985 :     Name: Matthias Blume
3986 : blume 920 Date: 2001/08/28 14:03:00 EDT
3987 :     Tag: blume-20010828-ml-lex
3988 :     Description:
3989 :    
3990 :     Fix for bug 1581, received from Neophytos Michael.
3991 :    
3992 :     ----------------------------------------------------------------------
3993 :     Name: Matthias Blume
3994 : blume 918 Date: 2001/08/27 11:20:00 EDT
3995 :     Tag: blume-20010827-readme11035
3996 :     Description:
3997 :    
3998 :     Fleshed out the README file for 110.35.
3999 :    
4000 :     ----------------------------------------------------------------------
4001 :     Name: Matthias Blume
4002 : blume 916 Date: 2001/08/24 17:10:00 EDT
4003 :     Tag: Release_110_35
4004 :     Description:
4005 :    
4006 :     New version number (110.35). New bootfiles.
4007 :    
4008 :     ----------------------------------------------------------------------
4009 : george 915 Name: Lal George
4010 : george 909 Date: 2001/08/24 13:47:18 EDT 2001
4011 :     Tag: george-20010824-MLRISC-graphs
4012 :     Description:
4013 :    
4014 :     removed clusters from MLRISC completely and replaced with graphs.
4015 :    
4016 :     ----------------------------------------------------------------------
4017 :     Name: Matthias Blume
4018 : blume 905 Date: 2001/08/23 17:50:00 EDT
4019 :     Tag: blume-20010823-toplevel
4020 :     Description:
4021 :    
4022 :     - some reorganization of the code that implements various kinds of
4023 :     environments in the compiler (static, dynamic, symbolic, combined)
4024 :     - re-implemented the EnvRef module so that evalStream works properly
4025 :     (if the stream contains references to "use", "CM.make", etc.)
4026 :     - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
4027 :    
4028 :     ----------------------------------------------------------------------
4029 :     Name: Matthias Blume
4030 : blume 904 Date: 2001/08/20 15:50 EDT
4031 :     Tag: blume20010820-slipup
4032 :     Description:
4033 :    
4034 :     I forgot to commit a few files. Here they are...
4035 :    
4036 :     ----------------------------------------------------------------------
4037 :     Name: Matthias Blume
4038 : blume 903 Date: 2001/08/20 15:35:00 EDT
4039 :     Tag: blume-20010820-debugprof
4040 :     Description:
4041 :    
4042 :     !!!! NEW BOOTFILES !!!!
4043 :    
4044 :     This is another round of reorganizing the compiler sources. This
4045 :     time the main goal was to factor out all the "instrumentation"
4046 :     passes (for profiling and backtracing) into their own library.
4047 :     The difficulty was to do it in such a way that it does not depend
4048 :     on elaborate.cm but only on elabdata.cm.
4049 :    
4050 :     Therefore there have been further changes to both elaborate.cm and
4051 :     elabdata.cm -- more "generic" things have been moved from the former
4052 :     to the latter. As a result, I was forced to split the assignment
4053 :     of numbers indicating "primtyc"s into two portions: SML-generic and
4054 :     SML/NJ-specific. Since it would have been awkward to maintain,
4055 :     I bit the bullet and actually _changed_ the mapping between these
4056 :     numbers and primtycs. The bottom line of this is that you need
4057 :     a new set of bin- and bootfiles.
4058 :    
4059 :     I have built new bootfiles for all architectures, so doing a fresh
4060 :     checkout and config/install.sh should be all you need.
4061 :    
4062 :     The newly created library's name is
4063 :    
4064 :     $smlnj/viscomp/debugprof.cm
4065 :    
4066 :     and its sources live under
4067 :    
4068 :     src/compiler/DebugProf
4069 :    
4070 :     ----------------------------------------------------------------------
4071 :     Name: Matthias Blume
4072 : blume 902 Date: 2001/08/15 17:15:00 EDT
4073 :     Tag: blume-20010815-compreorg
4074 :     Description:
4075 :    
4076 :     This is a first cut at reorganizing the CM libraries that make up the
4077 :     core of the compiler. The idea is to separate out pieces that could
4078 :     be used independently by tools, e.g., the parser, the typechecker, etc.
4079 :    
4080 :     The current status is a step in this direction, but it is not quite
4081 :     satisfactory yet. Expect more changes in the future.
4082 :    
4083 :     Here is the current (new) organization...
4084 :    
4085 :     What used to be $smlnj/viscomp/core.cm is now divided into
4086 :     six CM libraries:
4087 :    
4088 :     $smlnj/viscomp/basics.cm
4089 :     /parser.cm
4090 :     /elabdata.cm
4091 :     /elaborate.cm
4092 :     /execute.cm
4093 :     /core.cm
4094 :    
4095 :     The CM files for these libraries live under src/system/smlnj/viscomp.
4096 :     All these libraries are proxy libraries that contain precisely
4097 :     one CM library component. Here are the locations of the components
4098 :     (all within the src/compiler tree):
4099 :    
4100 :     Basics/basics.cm
4101 :     Parse/parser.cm
4102 :     ElabData/elabdata.cm
4103 :     Elaborator/elaborate.cm
4104 :     Execution/execute.cm
4105 :     core.cm
4106 :    
4107 :     [This organization is the same that has been used already
4108 :     for a while for the architecture-specific parts of the visible
4109 :     compiler and for the old version of core.cm.]
4110 :    
4111 :     As you will notice, many source files have been moved from their
4112 :     respective original locations to a new home in one of the above
4113 :     subtrees.
4114 :    
4115 :     The division of labor between the new libraries is the following:
4116 :    
4117 :     basics.cm:
4118 :     - Simple, basic definitions that pertain to many (or all) of
4119 :     the other libraries.
4120 :     parser.cm:
4121 :     - The SML parser, producing output of type Ast.dec.
4122 :     - The type family for Ast is also defined and exported here.
4123 :     elabdata.cm:
4124 :     - The datatypes that describe input and output of the elaborator.
4125 :     This includes types, absyn, and static environments.
4126 :     elaborator.cm:
4127 :     - The SML/NJ type checker and elaborator.
4128 :     This maps an Ast.dec (with a given static environment) to
4129 :     an Absyn.dec (with a new static environment).
4130 :     - This libraries implements certain modules that used to be
4131 :     structures as functors (to remove dependencies on FLINT).
4132 :     execute.cm:
4133 :     - Everything having to do with executing binary code objects.
4134 :     - Dynamic environments.
4135 :     core.cm:
4136 :     - SML/NJ-specific instantiations of the elaborator and MLRISC.
4137 :     - Top-level modules.
4138 :     - FLINT (this should eventually become its own library)
4139 :    
4140 :     Notes:
4141 :    
4142 :     I am not 100% happy with the way I separated the elaborator (and its
4143 :     data structures) from FLINT. Two instances of the same problem:
4144 :    
4145 :     1. Data structures contain certain fields that carry FLINT-specific
4146 :     information. I hacked around this using exn and the property list
4147 :     module from smlnj-lib. But the fact that there are middle-end
4148 :     specific fields around at all is a bit annoying.
4149 :    
4150 :     2. The elaborator calculates certain FLINT-related information. I tried
4151 :     to make this as abstract as I could using functorization, but, again,
4152 :     the fact that the elaborator has to perform calculations on behalf
4153 :     of the middle-end at all is not nice.
4154 :    
4155 :     3. Having to used exn and property lists is unfortunate because it
4156 :     weakens type checking. The other alternative (parameterizing
4157 :     nearly *everything*) is not appealing, though.
4158 :    
4159 :     I removed the "rebinding =" warning hack because due to the new organization
4160 :     it was awkward to maintain it. As a result, the compiler now issues some of
4161 :     these warnings when compiling init.cmi during bootstrap compilation. On
4162 :     the plus side, you also get a warning when you do, for example:
4163 :     val op = = Int32.+
4164 :     which was not the case up to now.
4165 :    
4166 :     I placed "assign" and "deref" into the _Core structure so that the
4167 :     code that deals with the "lazy" keyword can find them there. This
4168 :     removes the need for having access to the primitive environment
4169 :     during elaboration.
4170 :    
4171 :     ----------------------------------------------------------------------
4172 :     Name: Matthias Blume
4173 : blume 898 Date: 2001/08/13
4174 :     Tag: blume-20010813-closures
4175 :     Description:
4176 :    
4177 :     This fix was sent to us by Zhong Shao. It is supposed to improve the
4178 :     performance of certain loops by avoiding needless closure allocation.
4179 :    
4180 :     ----------------------------------------------------------------------
4181 : george 890 Name: Lal George
4182 : george 896 Date: 2001/07/31 10:03:23 EDT 2001
4183 :     Tag: george-20010731-x86-fmalloc
4184 :     Description: Fixed bug in x86 calls
4185 :    
4186 :     There was a bug where call instructions would mysteriously
4187 :     vanish. The call instruction had to be one that returned
4188 :     a floating point value.
4189 :    
4190 :     ----------------------------------------------------------------------
4191 :     Name: Lal George
4192 : george 890 Date: 2001/07/19 16:36:29 EDT 2001
4193 :     Tag: george-20010719-simple-cells
4194 :     Description:
4195 :    
4196 :     I have dramatically simplified the interface for CELLS in MLRISC.
4197 :    
4198 :     In summary, the cells interface is broken up into three parts:
4199 :    
4200 :     1. CellsBasis : CELLS_BASIS
4201 :    
4202 :     CellsBasis is a top level structure and common for all
4203 :     architectures. it contains the definitions of basic datatypes
4204 :     and utility functions over these types.
4205 :    
4206 :     2. functor Cells() : CELLS
4207 :    
4208 :     Cells generates an interface for CELLS that incorporates the
4209 :     specific resources on the target architecture, such as the
4210 :     presence of special register classes, their number and size,
4211 :     and various useful substructures.
4212 :    
4213 :     3. <ARCH>CELLS
4214 :    
4215 :     e.g. SparcCells: SPARCCELLS
4216 :    
4217 :     <ARCH>CELLS usually contains additional bindings for special
4218 :     registers on the architecture, such as:
4219 :    
4220 :     val r0 : cell (* register zero *)
4221 :     val y : cell (* Y register *)
4222 :     val psr : cell (* processor status register *)
4223 :     ...
4224 :    
4225 :     The structure returned by applying the Cells functor is opened
4226 :     in this interface.
4227 :    
4228 :     The main implication of all this is that the datatypes for cells is
4229 :     split between CellsBasis and CELLS -- a fairly simple change for user
4230 :     code.
4231 :    
4232 :     In the old scheme the CELLS interface had a definitional binding of
4233 :     the form:
4234 :    
4235 :     signature CELLS = sig
4236 :    
4237 :     structure CellsBasis = CellsBasis
4238 :    
4239 :     ...
4240 :    
4241 :     end
4242 :    
4243 :     With all the sharing constraints that goes on in MLRISC, this old
4244 :     design quickly leads to errors such as:
4245 :    
4246 :     "structure definition spec inside of sharing ... "
4247 :    
4248 :    
4249 :     and appears to require an unacceptable amount of sharing and where
4250 :     constraint hackery.
4251 :    
4252 :     I think this error message (the interaction of definitional specs and
4253 :     sharing) requires more explanation on our web page.
4254 :    
4255 :     ----------------------------------------------------------------------
4256 : blume 826 Name: Matthias Blume
4257 : blume 879 Date: 2001/07/19 15:00:00 EDT
4258 :     Tag: blume-20010719-libreorg
4259 :     Description:
4260 :    
4261 :     This update puts together a fairly extensive but straightforward change
4262 :     to the way the libraries that implement the interactive system are
4263 :     organized:
4264 :    
4265 :     The biggest change is the elimination of structure Compiler. As a
4266 :     replacement for this structure, there is now a CM library
4267 :     (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
4268 :     that exports all the substructures of the original structure Compiler
4269 :     directly. So instead of saying Compiler.Foo.bar one now simply
4270 :     says Foo.bar. (The CM libraries actually export a collection of
4271 :     structures that is richer than the collection of substructures of
4272 :     structure Compiler.)
4273 :    
4274 :     To make the transition smooth, there is a separate library called
4275 :     $smlnj/compiler/compiler.cm which puts together and exports the
4276 :     original structure Compiler (or at least something very close to it).
4277 :    
4278 :     There are five members of the original structure Compiler
4279 :     that are not exported directly but which instead became members
4280 :     of a new structure Backend (described by signature BACKEND). These are:
4281 :     structure Profile (: PROFILE), structure Compile (: COMPILE), structure
4282 :     Interact (: INTERACT), structure Machine (: MACHINE), and val
4283 :     architecture (: string).
4284 :    
4285 :     Structure Compiler.Version has become structure CompilerVersion.