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Annotation of /sml/trunk/HISTORY

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1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 :     Name:
11 :     Date:
12 :     Tag: <post-commit CVS tag>
13 :     Description:
14 : leunga 585
15 : leunga 576 ----------------------------------------------------------------------
16 : blume 587 Name: Matthias Blume
17 : blume 588 Date: 2000/03/31 18:00:00 JST
18 :     Tag: blume_main_v110p26p2_1
19 :     Description:
20 :    
21 :     This update contains:
22 :    
23 :     1. A small change to CM's handling of stable libraries:
24 :     CM now maintains one "global" modmap that is used for all stable
25 :     libraries. The use of such a global modmap maximizes sharing and
26 :     minimizes the need for re-traversing parts of environments during
27 :     modmap construction. (However, this has minor impact since modmap
28 :     construction seems to account for just one percent or less of total
29 :     compile time.)
30 :    
31 :     2. I added a "genmap" phase to the statistics. This is where I got the
32 :     "one percent" number (see above).
33 :    
34 :     3. CM's new tool parameter mechanism just became _even_ better. :)
35 :     - The parser understands named parameters and recursive options.
36 :     - The "make" and "shell" tools use these new features.
37 :     (This makes it a lot easier to cascade these tools.)
38 :     - There is a small syntax change: named parameters use a
39 :    
40 :     <name> : ( <option> ... ) or
41 :     <name> : <string>
42 :    
43 :     syntax. Previously, named parameters were implemented in an
44 :     ad-hoc fashion by each tool individually (by parsing strings)
45 :     and had the form
46 :    
47 :     <name>=<string>
48 :    
49 :     See the CM manual for a full description of these issues.
50 :    
51 :     ----------------------------------------------------------------------
52 :     Name: Matthias Blume
53 : blume 587 Date: 2000/03/30 18:00:00 JST
54 :     Tag: blume_main_v110p26p2_0
55 :     Description:
56 :    
57 :     !!!!! WARNING !!!!!!
58 :     !! New binfiles !!
59 :     !!!!!!!!!!!!!!!!!!!!
60 :    
61 :     This update contains:
62 :    
63 :     1. Moderate changes to CM:
64 :    
65 :     - Changes to CM's tools mechanism. In particular, it is now possible
66 :     to have tools that accept additional "command line" parameters
67 :     (specified in the .cm file at each instance where the tool's class is
68 :     used).
69 :    
70 :     This was done to accomodate the new "make" and "shell" tools which
71 :     facilitate fairly seemless hookup to portions of code managed using
72 :     Makefiles or Shell scripts.
73 :    
74 :     There are no classes "shared" or "private" anymore. Instead, the
75 :     sharing annotation is now a parameter to the "sml" class.
76 :    
77 :     There is a bit of generic machinery for implementing one's own
78 :     tools that accept command-line parameters. However, I am not yet fully
79 :     satisfied with that part, so expect changes here in the future.
80 :    
81 :     All existing tools are described in the CM manual.
82 :    
83 :     - Slightly better error handling. (CM now surpresses many followup
84 :     error messages that tended to be more annoying than helpful.)
85 :    
86 :     2. Major changes to the compiler's static environment data structures.
87 :    
88 :     - no CMStaticEnv anymore.
89 :     - no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
90 :     but it is called Environment), no conversions between different
91 :     kinds of static environments
92 :    
93 :     - There is still a notion of a "modmap", but such modmaps are generated
94 :     on demand at the time when they are needed. This sounds slow, but I
95 :     sped up the code that generates modmaps enough for this not to lead to
96 :     a slowdown of the compiler (at least I didn't detect any).
97 :    
98 :     - To facilitate rapid modmap generation, static environments now
99 :     contain an (optional) "modtree" structure. Modtree annotations are
100 :     constructed by the unpickler during unpickling. (This means that
101 :     the elaborator does not have to worry about modtrees at all.)
102 :     Modtrees have the advantage that they are compositional in the same
103 :     way as the environment data structure itself is compositional.
104 :     As a result, modtrees never hang on to parts of an environment that
105 :     has already been rendered "stale" by filtering or rebinding.
106 :    
107 :     - I went through many, many trials and errors before arriving at the
108 :     current solution. (The initial idea of "linkpaths" did not work.)
109 :     But the result of all this is that I have touched a lot of files that
110 :     depend on the "modules" and "types" data structures (most of the
111 :     elaborator). There were a lot of changes during my "linkpath" trials
112 :     that could have been reverted to their original state but weren't.
113 :     Please, don't be too harsh on me for messing with this code a bit more
114 :     than what was strictly necessary... (I _did_ resist the tempation
115 :     of doing any "global reformatting" to avoid an untimely death at
116 :     Dave's hands. :)
117 :    
118 :     - One positive aspect of the previous point: At least I made sure that
119 :     all files that I touched now compile without warnings (other than
120 :     "polyEqual").
121 :    
122 :     - compiler now tends to run "leaner" (i.e., ties up less memory in
123 :     redundant modmaps)
124 :    
125 :     ----------------------------------------------------------------------
126 : leunga 580 Name: Allen Leung
127 : leunga 585 Date: 2000/03/29 18:00:00
128 :     Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
129 : leunga 586 Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
130 : leunga 585 Description:
131 :    
132 :     This update contains *MAJOR* changes to the way code is generated from CPS
133 :     in the module mlriscGen, and in various backend modules.
134 :    
135 :     CHANGES
136 :     =======
137 :    
138 :     1. MLRiscGen: forward propagation fix.
139 :    
140 :     There was a bug in forward propagation introduced at about the same time
141 :     as the MLRISC x86 backend, which prohibits coalescing to be
142 :     performed effectively in loops.
143 :    
144 :     Effect: speed up of loops in RISC architectures.
145 :     By itself, this actually slowed down certain benchmarks on the x86.
146 :    
147 :     2. MLRiscGen: forward propagating addresses from consing.
148 :    
149 :     I've changed the way consing code is generated. Basically I separated
150 :     out the initialization part:
151 :    
152 :     store tag, offset(allocptr)
153 :     store elem1, offset+4(allocptr)
154 :     store elem2, offset+8(allocptr)
155 :     ...
156 :     store elemn, offset+4n(allocptr)
157 :    
158 :     and the address computation part:
159 :    
160 :     celladdr <- offset+4+alloctpr
161 :    
162 :     and move the address computation part
163 :    
164 :     Effect: register pressure is generally lower as a result. This
165 :     makes compilation of certain expressions much faster, such as
166 :     long lists with non-trivial elements.
167 :    
168 :     [(0,0), (0,0), .... (0,0)]
169 :    
170 :     3. MLRiscGen: base pointer elimination.
171 :    
172 :     As part of the linkage mechanism, we generate the sequence:
173 :    
174 :     L: ... <- start of the code fragment
175 :    
176 :     L1:
177 :     base pointer <- linkreg - L1 + L
178 :    
179 :     The base pointer was then used for computing relocatable addresses
180 :     in the code fragment. Frequently (such as in lots of continuations)
181 :     this is not needed. We now eliminate this sequence whenever possible.
182 :    
183 :     For compile time efficiency, I'm using a very stupid local heuristic.
184 :     But in general, this should be done as a control flow analysis.
185 :    
186 :     Effect: Smaller code size. Speed up of most programs.
187 :    
188 :     4. Hppa back end
189 :    
190 :     Long jumps in span dependence resolution used to depend on the existence
191 :     of the base pointer.
192 :    
193 :     A jump to a long label L was expanded into the following sequence:
194 :    
195 :     LDIL %hi(L-8192), %r29
196 :     LDO %lo(L-8192)(%r29), %r29
197 :     ADD %r29, baseptr, %r29
198 :     BV,n %r0(%r29)
199 :    
200 :     In the presence of change (3) above, this will not work. I've changed
201 :     it so that the following sequence of instructions are generated, which
202 :     doesn't mention the base pointer at all:
203 :    
204 :     BL,n L', %r29 /* branch and link, L' + 4 -> %r29 */
205 :     L': ADDIL L-(L'+4), %r29 /* Compute address of L */
206 :     BV,n %r0(%r29) /* Jump */
207 :    
208 :     5. Alpha back end
209 :    
210 :     New alpha instructions LDB/LDW have been added, as per Fermin's
211 :     suggestions. This is unrelated to all other changes.
212 :    
213 :     6. X86 back end
214 :    
215 :     I've changed andl to testl in the floating point test sequence
216 :     whenever appropriate. The Intel optimization guide states that
217 :     testl is perferable to andl.
218 :    
219 :     7. RA (x86 only)
220 :    
221 :     I've improved the spill propagation algorithm, using an approximation
222 :     of maximal weighted independent sets. This seems to be necessary to
223 :     alleviate the negative effect in light of the slow down in (1).
224 :    
225 :     I'll write down the algorithm one of these days.
226 :    
227 :     8. MLRiscGen: frequencies
228 :    
229 :     I've added an annotation that states that all call gc blocks have zero
230 :     execution frequencies. This improves register allocation on the x86.
231 :    
232 :     BENCHMARKS
233 :     ==========
234 :    
235 :     I've only perform the comparison on 110.25.
236 :    
237 :     The platforms are:
238 :    
239 :     HPPA A four processor HP machine (E9000) with 5G of memory.
240 :     X86 A 300Hhz Pentium II with 128M of memory, and
241 :     SPARC An Ultra sparc 2 with 512M of memory.
242 :    
243 :     I used the following parameters for the SML benchmarks:
244 :    
245 :     @SMLalloc
246 :     HPPA 256k
247 :     SPARC 512k
248 :     X86 256k
249 :    
250 :     COMPILATION TIME
251 :     ----------------
252 :     Here are the numbers comparing the compilation times of the compilers.
253 :     I've only compared 110.25 compiling the new sources versus
254 :     a fixpoint version of the new compiler compiling the same.
255 :    
256 :     110.25 New
257 :     Total Time in RA Spill+Reload Total Time In RA Spill+Reload
258 :     HPPA 627s 116s 2684+3584 599s 95s 1003+1879
259 :     SPARC 892s 173s 2891+3870 708s 116s 1004+1880
260 :     X86 999s 315s 94006+130691 987s 296s 108877+141957
261 :    
262 :     110.25 New
263 :     Code Size Code Size
264 :     HPPA 8596736 8561421
265 :     SPARC 8974299 8785143
266 :     X86 9029180 8716783
267 :    
268 :     So in summary, things are at least as good as before. Dramatic
269 :     reduction in compilation is obtained on the Sparc; I can't explain it,
270 :     but it is reproducible. Perhaps someone should try to reproduce this
271 :     on their own machines.
272 :    
273 :     SML BENCHMARKS
274 :     --------------
275 :    
276 :     On the average, all benchmarks perform at least as well as before.
277 :    
278 :     HPPA Compilation Time Spill+Reload Run Time
279 :     110.25 New 110.25 New 110.25 New
280 :    
281 :     barnesHut 3.158 3.015 4.75% 1+1 0+0 2.980 2.922 2.00%
282 :     boyer 6.152 5.708 7.77% 0+0 0+0 0.218 0.213 2.34%
283 :     count-graphs 1.168 1.120 4.32% 0+0 0+0 22.705 23.073 -1.60%
284 :     fft 0.877 0.792 10.74% 1+3 1+3 0.602 0.587 2.56%
285 :     knuthBendix 3.180 2.857 11.32% 0+0 0+0 0.675 0.662 2.02%
286 :     lexgen 6.190 5.290 17.01% 0+0 0+0 0.913 0.788 15.86%
287 :     life 0.803 0.703 14.22% 25+25 0+0 0.153 0.140 9.52%
288 :     logic 2.048 2.007 2.08% 6+6 1+1 4.133 4.008 3.12%
289 :     mandelbrot 0.077 0.080 -4.17% 0+0 0+0 0.765 0.712 7.49%
290 :     mlyacc 22.932 20.937 9.53% 154+181 32+57 0.468 0.430 8.91%
291 :     nucleic 5.183 5.060 2.44% 2+2 0+0 0.125 0.120 4.17%
292 :     ratio-regions 3.357 3.142 6.84% 0+0 0+0 116.225 113.173 2.70%
293 :     ray 1.283 1.290 -0.52% 0+0 0+0 2.887 2.855 1.11%
294 :     simple 6.307 6.032 4.56% 28+30 5+7 3.705 3.658 1.28%
295 :     tsp 0.888 0.862 3.09% 0+0 0+0 7.040 6.893 2.13%
296 :     vliw 24.378 23.455 3.94% 106+127 25+45 2.758 2.707 1.91%
297 :     --------------------------------------------------------------------------
298 :     Average 6.12% 4.09%
299 :    
300 :     SPARC Compilation Time Spill+Reload Run Time
301 :     110.25 New 110.25 New 110.25 New
302 :    
303 :     barnesHut 3.778 3.592 5.20% 2+2 0+0 3.648 3.453 5.65%
304 :     boyer 6.632 6.110 8.54% 0+0 0+0 0.258 0.242 6.90%
305 :     count-graphs 1.435 1.325 8.30% 0+0 0+0 33.672 34.737 -3.07%
306 :     fft 0.980 0.940 4.26% 3+9 2+6 0.838 0.827 1.41%
307 :     knuthBendix 3.590 3.138 14.39% 0+0 0+0 0.962 0.967 -0.52%
308 :     lexgen 6.593 6.072 8.59% 1+1 0+0 1.077 1.078 -0.15%
309 :     life 0.972 0.868 11.90% 26+26 0+0 0.143 0.140 2.38%
310 :     logic 2.525 2.387 5.80% 7+7 1+1 5.625 5.158 9.05%
311 :     mandelbrot 0.090 0.093 -3.57% 0+0 0+0 0.855 0.728 17.39%
312 :     mlyacc 26.732 23.827 12.19% 162+189 32+57 0.550 0.560 -1.79%
313 :     nucleic 6.233 6.197 0.59% 3+3 0+0 0.163 0.173 -5.77%
314 :     ratio-regions 3.780 3.507 7.79% 0+0 0+0 133.993 131.035 2.26%
315 :     ray 1.595 1.550 2.90% 1+1 0+0 3.440 3.418 0.63%
316 :     simple 6.972 6.487 7.48% 29+32 5+7 3.523 3.525 -0.05%
317 :     tsp 1.115 1.063 4.86% 0+0 0+0 7.393 7.265 1.77%
318 :     vliw 27.765 24.818 11.87% 110+135 25+45 2.265 2.135 6.09%
319 :     ----------------------------------------------------------------------------
320 :     Average 6.94% 2.64%
321 :    
322 :     X86 Compilation Time Spill+Reload Run Time
323 :     110.25 New 110.25 New 110.25 New
324 :    
325 :     barnesHut 5.530 5.420 2.03% 593+893 597+915 3.532 3.440 2.66%
326 :     boyer 8.768 7.747 13.19% 493+199 301+289 0.327 0.297 10.11%
327 :     count-graphs 2.040 2.010 1.49% 298+394 315+457 26.578 28.660 -7.26%
328 :     fft 1.327 1.302 1.92% 112+209 115+210 1.055 0.962 9.71%
329 :     knuthBendix 5.218 5.475 -4.69% 451+598 510+650 0.928 0.932 -0.36%
330 :     lexgen 9.970 9.623 3.60% 1014+841 1157+885 0.947 0.928 1.97%
331 :     life 1.183 1.183 0.00% 162+182 145+148 0.127 0.103 22.58%
332 :     logic 3.285 3.512 -6.45% 514+684 591+836 5.682 5.577 1.88%
333 :     mandelbrot 0.147 0.143 2.33% 38+41 33+54 0.703 0.690 1.93%
334 :     mlyacc 35.457 32.763 8.22% 3496+4564 3611+4860 0.552 0.550 0.30%
335 :     nucleic 7.100 6.888 3.07% 239+168 201+158 0.175 0.173 0.96%
336 :     ratio-regions 6.388 6.843 -6.65% 1182+257 981+300 120.142 120.345 -0.17%
337 :     ray 2.332 2.338 -0.29% 346+398 402+494 3.593 3.540 1.51%
338 :     simple 9.912 9.903 0.08% 1475+941 1579+1168 3.057 3.178 -3.83%
339 :     tsp 1.623 1.532 5.98% 266+200 250+211 8.045 7.878 2.12%
340 :     vliw 33.947 35.470 -4.29% 2629+2774 2877+3171 2.072 1.890 9.61%
341 :     ----------------------------------------------------------------------------
342 :     Average 1.22% 3.36%
343 :    
344 :     ----------------------------------------------------------------------
345 :     Name: Allen Leung
346 : leunga 583 Date: 2000/03/23 16:25:00
347 :     Tag: leunga-20000323-fix_x86_alpha
348 :     Description:
349 :    
350 :     1. X86 fixes/changes
351 :    
352 :     a. The old code generated for SETcc was completely wrong.
353 :     The Intel optimization guide is VERY misleading.
354 :    
355 :     2. ALPHA fixes/changes
356 :    
357 :     a. Added the instructions LDBU, LDWU, STB, STW as per Fermin's suggestion.
358 :     b. Added a new mode byteWordLoadStores to the functor parameter to Alpha()
359 :     c. Added reassociation code for address computation.
360 :    
361 :     ----------------------------------------------------------------------
362 :     Name: Allen Leung
363 : leunga 580 Date: 2000/03/22 01:23:00
364 :     Tag: leunga-20000322-fix_x86_hppa_ra
365 :     Description:
366 :    
367 :     1. X86 fixes/changes
368 :    
369 :     a. x86Rewrite bug with MUL3 (found by Lal)
370 :     b. Added the instructions FSTS, FSTL
371 :    
372 :     2. PA-RISC fixes/changes
373 :    
374 :     a. B label should not be a delay slot candidate! Why did this work?
375 :     b. ADDT(32, REG(32, r), LI n) now generates one instruction instead of two,
376 :     as it should be.
377 :     c. The assembly syntax for fstds and fstdd was wrong.
378 :     d. Added the composite instruction COMICLR/LDO, which is the immediate
379 :     operand variant of COMCLR/LDO.
380 :    
381 :     3. Generic MLRISC
382 :    
383 :     a. shuffle.sml rewritten to be slightly more efficient
384 :     b. DIV bug in mltree-simplify fixed (found by Fermin)
385 :    
386 :     4. Register Allocator
387 :    
388 :     a. I now release the interference graph earlier during spilling.
389 :     May improve memory usage.
390 :    
391 :     ----------------------------------------------------------------------
392 : blume 577 Name: Matthias Blume
393 : blume 578 Date: 2000/03/14 14:15:32
394 :     Tag: blume_main_v110p26p1_2
395 :     Description:
396 :    
397 :     1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
398 :     additional argument called "template" which is an optional string that
399 :     specifiel the layout of the tool command line. See the CM manual for
400 :     explanation.
401 :    
402 :     2. A special-purpose tool can be "regisitered" by simply dropping the
403 :     corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
404 :     directory where the .cm file lives that uses this tool. (The
405 :     behavior/misfeature until now was to look for the tool description
406 :     files in the current working directory.) As before, tool description
407 :     files could also be anchored -- in which case they can live anywhere
408 :     they like. Following the recent e-mail discussion, this change should
409 :     make it easier to have special-purpose tools that are shipped together
410 :     with the sources of the program that uses them.
411 :    
412 :     ----------------------------------------------------------------------
413 :     Name: Matthias Blume
414 : blume 577 Date: 2000/03/10 07:48:34
415 :     Tag: blume_main_v110p26p1_1
416 :     Description:
417 :    
418 :     I added a re-written version of Dave's fixpt script to src/system.
419 :     Changes relative to the original version:
420 :     - sh-ified (not everybody has ksh)
421 :     - automatically figures out which architecture it runs on
422 :     - uses ./makeml a bit more cleverly
423 :     - never invokes ./installml (and, thus, does not clobber your
424 :     good and working installation of sml in case something goes wrong)
425 :     - accepts max iteration count using option "-iter <n>"
426 :     - accepts a "base" name using option "-base <base>"
427 :    
428 :     It does not build any extraneous heap images but directly rebuilds
429 :     bin- and boot-hierarchies using makeml's "-rebuild" switch. Finally,
430 :     it can incorporate existing bin- and boot- hierarchies. For example,
431 :     suppose the base is set to "sml" (which is the default). Then it
432 :     successively builds
433 :    
434 :     sml.bin.<arch>-unix and sml.boot.<arch>-unix
435 :     then sml1.bin.<arch>-unix and sml1.boot.<arch>-unix
436 :     then sml2.bin.<arch>-unix and sml2.boot.<arch>-unix
437 :     ...
438 :     then sml<n>.bin.<arch>-unix and sml<n>.boot.<arch>-unix
439 :    
440 :     and so on. If any of these already exist, it will just use what's
441 :     there. In particular, many people will have the initial set of bin
442 :     and boot files around, so this saves time for at least one full
443 :     rebuild. Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
444 :     <k>=1,2,... is normally not a good idea when invoking fixpt. However,
445 :     they might be the result of an earlier partial run of fixpt (which
446 :     perhaps got accidentially killed). In this case, fixpt will quickly
447 :     move through what exists before continuing where it left off earlier,
448 :     and, thus, saves a lot of time.
449 :    
450 :     ----------------------------------------------------------------------
451 : leunga 576 Name: Allen Leung
452 :     Date: 00/03/10 02:20:00
453 :     Tag: leunga-20000310-fix_x86_asm_ra
454 :     Description:
455 : dbm 570
456 : leunga 576 More assembly output problems involving the indexed addressing mode
457 :     on the x86 have been found and corrected. Thanks to Fermin Reig for the
458 :     fix.
459 :    
460 :     The interface and implementation of the register allocator have been changed
461 :     slightly to accommodate the possibility to skip the register allocation
462 :     phases completely and go directly to memory allocation. This is needed
463 :     for C-- use.
464 :    
465 : dbm 570 ----------------------------------------------------------------------
466 : blume 572 Name: Matthias Blume
467 : blume 575 Date: 00/03/09 10:23:53
468 :     Tag: blume_main_v110p26p1_0
469 :     Description:
470 :    
471 :     * Complete re-organization of library names. Many libraries have been
472 :     consolidated so that they share the same path anchor. For example,
473 :     all MLRISC-related libraries are anchored at MLRISC, most libraries that
474 :     are SML/NJ-specific are under "smlnj". Notice that names like
475 :     host-cmb.cm or host-compiler.cm no longer exist. See system/README
476 :     for a complete description of the new naming scheme. Quick reference:
477 :    
478 :     host-cmb.cm -> smlnj/cmb.cm
479 :     host-compiler.cm -> smlnj/compiler.cm
480 :     full-cm.cm -> smlnj/cm.cm
481 :     <arch>-<os>.cm -> smlnj/cmb/<arch>-<os>.cm
482 :     <arch>-compiler.cm -> smlnj/compiler/<arch>.cm
483 :    
484 :     * Bug fixes in CM.
485 :     - exceptions in user code are being passed through (i.e., reach top level)
486 :     - more bugs in paranoia mode fixed
487 :     - bug related to checking group owners fixed
488 :    
489 :     * New install.sh script that automagically fetches archive files:
490 :     The new file config/srcarchiveurl must contain the URL of the
491 :     (remote) directory that contains bin files (or other source archives).
492 :     If install.sh does not find the archive locally, it tries to get
493 :     it from that remote directory.
494 :     This should simplify installation further: For machines that have
495 :     access to the internet, just fetch <version>-config.tgz, unpack it,
496 :     edit config/targets, and go (run config/install.sh). The scipt will
497 :     fetch everything else that it might need all by itself.
498 :    
499 :     For CVS users, this mechanism is not relevant for source archives, but
500 :     it is convenient for getting new sets of binfiles.
501 :    
502 :     Archives should be tar files compressed with either gzip, compress, or
503 :     bzip2. The script recognizes .tgz, .tar, tar.gz, tz, .tar.Z, and .tar.bz2.
504 :    
505 :     ----------------------------------------------------------------------
506 :     Name: Matthias Blume
507 : blume 572 Date: 2000/03/07 04:01:04
508 :     Tag: blume_main_v110_26_2
509 : dbm 570 Description:
510 : blume 572 - size info in BOOTLIST
511 :     * no fixed upper limits for number of bootfiles or length of
512 :     bootfile names in runtime
513 :     * falling back to old behavior if no BOOTLIST size info found
514 :     - allocation size heuristics in .run-sml
515 :     * tries to read cache size from /proc/cpuinfo (this is important for
516 :     small-cache Celeron systems!)
517 :     - install.sh robustified
518 :     - CM manual updates
519 :     - paranoid mode
520 :     * no more CMB.deliver() (i.e., all done by CMB.make())
521 :     * can re-use existing sml.boot.* files
522 :     * init.cmi now treated as library
523 :     * library stamps for consistency checks
524 :     - sml.boot.<arch>-<os>/PIDMAP file
525 :     * This file is read by the CM startup code. This is used to minimize
526 :     the amount of dynamic state that needs to be stowed away for the
527 :     purpose of sharing between interactive system and user code.
528 :     - CM.Anchor.anchor instead of CM.Anchor.{set,cancel}
529 :     * Upon request by Elsa. Anchors now controlled by get-set-pair
530 :     like most other CM state variables.
531 :     - Compiler.CMSA eliminated
532 :     * No longer supported by CM anyway.
533 :     - fixed bugs in pickler that kept biting Stefan
534 :     * past refs to past refs (was caused by the possibility that
535 :     ad-hoc sharing is more discriminating than hash-cons sharing)
536 :     * integer overflow on LargeInt.minInt
537 :     - ml-{lex,yacc} build scripts now use new mechanism
538 :     for building standalone programs
539 :     - fixed several gcc -Wall warnings that were caused by missing header
540 :     files, missing initializations, etc., in runtime (not all warnings
541 :     eliminated, though)

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