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

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Original Path: sml/trunk/HISTORY

1 : dbm 570 This is the HISTORY file for the Yale SML/NJ CVS repository.
2 :    
3 :     An entry should be made for _every_ commit to the repository.
4 :     The entries in this file will be used when creating the README
5 :     for new versions, so keep that in mind when writing the
6 :     description.
7 :    
8 :     The form of an entry should be:
9 :    
10 :     Name:
11 :     Date:
12 :     Tag: <post-commit CVS tag>
13 :     Description:
14 : leunga 585
15 : leunga 576 ----------------------------------------------------------------------
16 : leunga 590 Name: Allen Leung
17 :     Date: 2000/03/31 21:15:00 EST
18 :     Tag: leunga-20000331-aliasing
19 :     Description:
20 :    
21 :     This update contains a rewritten (and hopefully more correct) module
22 :     for extracting aliasing information from CPS.
23 :    
24 :     To turn on this feature:
25 :    
26 :     Compiler.Control.CG.memDisambiguate := true
27 :    
28 :     To pretty print the region information with assembly
29 :    
30 :     Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
31 :    
32 :     To control how many levels of aliasing information are printed, use:
33 :    
34 :     Compiler.Control.MLRISC.getInt "points-to-show-level" := n
35 :    
36 :     The default of n is 3.
37 :    
38 :     ----------------------------------------------------------------------
39 : dbm 589 Name: David MacQueen
40 :     Date: 2000/03/31 11:15:00 EST
41 :     Tag: dbm-20000331-runtime_fix
42 :     Description:
43 :    
44 :     This update contains:
45 :    
46 :     1. runtime/c-lib/c-libraries.c
47 :     includes added in revision 1.2 caused compilation errors on hppa-hpux
48 :    
49 :     2. fix for bug 1556
50 :     system/Basis/Implementation/NJ/internal-signals.sml
51 :    
52 :     ----------------------------------------------------------------------
53 : blume 587 Name: Matthias Blume
54 : blume 588 Date: 2000/03/31 18:00:00 JST
55 :     Tag: blume_main_v110p26p2_1
56 :     Description:
57 :    
58 :     This update contains:
59 :    
60 :     1. A small change to CM's handling of stable libraries:
61 :     CM now maintains one "global" modmap that is used for all stable
62 :     libraries. The use of such a global modmap maximizes sharing and
63 :     minimizes the need for re-traversing parts of environments during
64 :     modmap construction. (However, this has minor impact since modmap
65 :     construction seems to account for just one percent or less of total
66 :     compile time.)
67 :    
68 :     2. I added a "genmap" phase to the statistics. This is where I got the
69 :     "one percent" number (see above).
70 :    
71 :     3. CM's new tool parameter mechanism just became _even_ better. :)
72 :     - The parser understands named parameters and recursive options.
73 :     - The "make" and "shell" tools use these new features.
74 :     (This makes it a lot easier to cascade these tools.)
75 :     - There is a small syntax change: named parameters use a
76 :    
77 :     <name> : ( <option> ... ) or
78 :     <name> : <string>
79 :    
80 :     syntax. Previously, named parameters were implemented in an
81 :     ad-hoc fashion by each tool individually (by parsing strings)
82 :     and had the form
83 :    
84 :     <name>=<string>
85 :    
86 :     See the CM manual for a full description of these issues.
87 :    
88 :     ----------------------------------------------------------------------
89 :     Name: Matthias Blume
90 : blume 587 Date: 2000/03/30 18:00:00 JST
91 :     Tag: blume_main_v110p26p2_0
92 :     Description:
93 :    
94 :     !!!!! WARNING !!!!!!
95 :     !! New binfiles !!
96 :     !!!!!!!!!!!!!!!!!!!!
97 :    
98 :     This update contains:
99 :    
100 :     1. Moderate changes to CM:
101 :    
102 :     - Changes to CM's tools mechanism. In particular, it is now possible
103 :     to have tools that accept additional "command line" parameters
104 :     (specified in the .cm file at each instance where the tool's class is
105 :     used).
106 :    
107 :     This was done to accomodate the new "make" and "shell" tools which
108 :     facilitate fairly seemless hookup to portions of code managed using
109 :     Makefiles or Shell scripts.
110 :    
111 :     There are no classes "shared" or "private" anymore. Instead, the
112 :     sharing annotation is now a parameter to the "sml" class.
113 :    
114 :     There is a bit of generic machinery for implementing one's own
115 :     tools that accept command-line parameters. However, I am not yet fully
116 :     satisfied with that part, so expect changes here in the future.
117 :    
118 :     All existing tools are described in the CM manual.
119 :    
120 :     - Slightly better error handling. (CM now surpresses many followup
121 :     error messages that tended to be more annoying than helpful.)
122 :    
123 :     2. Major changes to the compiler's static environment data structures.
124 :    
125 :     - no CMStaticEnv anymore.
126 :     - no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
127 :     but it is called Environment), no conversions between different
128 :     kinds of static environments
129 :    
130 :     - There is still a notion of a "modmap", but such modmaps are generated
131 :     on demand at the time when they are needed. This sounds slow, but I
132 :     sped up the code that generates modmaps enough for this not to lead to
133 :     a slowdown of the compiler (at least I didn't detect any).
134 :    
135 :     - To facilitate rapid modmap generation, static environments now
136 :     contain an (optional) "modtree" structure. Modtree annotations are
137 :     constructed by the unpickler during unpickling. (This means that
138 :     the elaborator does not have to worry about modtrees at all.)
139 :     Modtrees have the advantage that they are compositional in the same
140 :     way as the environment data structure itself is compositional.
141 :     As a result, modtrees never hang on to parts of an environment that
142 :     has already been rendered "stale" by filtering or rebinding.
143 :    
144 :     - I went through many, many trials and errors before arriving at the
145 :     current solution. (The initial idea of "linkpaths" did not work.)
146 :     But the result of all this is that I have touched a lot of files that
147 :     depend on the "modules" and "types" data structures (most of the
148 :     elaborator). There were a lot of changes during my "linkpath" trials
149 :     that could have been reverted to their original state but weren't.
150 :     Please, don't be too harsh on me for messing with this code a bit more
151 :     than what was strictly necessary... (I _did_ resist the tempation
152 :     of doing any "global reformatting" to avoid an untimely death at
153 :     Dave's hands. :)
154 :    
155 :     - One positive aspect of the previous point: At least I made sure that
156 :     all files that I touched now compile without warnings (other than
157 :     "polyEqual").
158 :    
159 :     - compiler now tends to run "leaner" (i.e., ties up less memory in
160 :     redundant modmaps)
161 :    
162 :     ----------------------------------------------------------------------
163 : leunga 580 Name: Allen Leung
164 : leunga 585 Date: 2000/03/29 18:00:00
165 :     Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
166 : leunga 586 Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
167 : leunga 585 Description:
168 :    
169 :     This update contains *MAJOR* changes to the way code is generated from CPS
170 :     in the module mlriscGen, and in various backend modules.
171 :    
172 :     CHANGES
173 :     =======
174 :    
175 :     1. MLRiscGen: forward propagation fix.
176 :    
177 :     There was a bug in forward propagation introduced at about the same time
178 :     as the MLRISC x86 backend, which prohibits coalescing to be
179 :     performed effectively in loops.
180 :    
181 :     Effect: speed up of loops in RISC architectures.
182 :     By itself, this actually slowed down certain benchmarks on the x86.
183 :    
184 :     2. MLRiscGen: forward propagating addresses from consing.
185 :    
186 :     I've changed the way consing code is generated. Basically I separated
187 :     out the initialization part:
188 :    
189 :     store tag, offset(allocptr)
190 :     store elem1, offset+4(allocptr)
191 :     store elem2, offset+8(allocptr)
192 :     ...
193 :     store elemn, offset+4n(allocptr)
194 :    
195 :     and the address computation part:
196 :    
197 :     celladdr <- offset+4+alloctpr
198 :    
199 :     and move the address computation part
200 :    
201 :     Effect: register pressure is generally lower as a result. This
202 :     makes compilation of certain expressions much faster, such as
203 :     long lists with non-trivial elements.
204 :    
205 :     [(0,0), (0,0), .... (0,0)]
206 :    
207 :     3. MLRiscGen: base pointer elimination.
208 :    
209 :     As part of the linkage mechanism, we generate the sequence:
210 :    
211 :     L: ... <- start of the code fragment
212 :    
213 :     L1:
214 :     base pointer <- linkreg - L1 + L
215 :    
216 :     The base pointer was then used for computing relocatable addresses
217 :     in the code fragment. Frequently (such as in lots of continuations)
218 :     this is not needed. We now eliminate this sequence whenever possible.
219 :    
220 :     For compile time efficiency, I'm using a very stupid local heuristic.
221 :     But in general, this should be done as a control flow analysis.
222 :    
223 :     Effect: Smaller code size. Speed up of most programs.
224 :    
225 :     4. Hppa back end
226 :    
227 :     Long jumps in span dependence resolution used to depend on the existence
228 :     of the base pointer.
229 :    
230 :     A jump to a long label L was expanded into the following sequence:
231 :    
232 :     LDIL %hi(L-8192), %r29
233 :     LDO %lo(L-8192)(%r29), %r29
234 :     ADD %r29, baseptr, %r29
235 :     BV,n %r0(%r29)
236 :    
237 :     In the presence of change (3) above, this will not work. I've changed
238 :     it so that the following sequence of instructions are generated, which
239 :     doesn't mention the base pointer at all:
240 :    
241 :     BL,n L', %r29 /* branch and link, L' + 4 -> %r29 */
242 :     L': ADDIL L-(L'+4), %r29 /* Compute address of L */
243 :     BV,n %r0(%r29) /* Jump */
244 :    
245 :     5. Alpha back end
246 :    
247 :     New alpha instructions LDB/LDW have been added, as per Fermin's
248 :     suggestions. This is unrelated to all other changes.
249 :    
250 :     6. X86 back end
251 :    
252 :     I've changed andl to testl in the floating point test sequence
253 :     whenever appropriate. The Intel optimization guide states that
254 :     testl is perferable to andl.
255 :    
256 :     7. RA (x86 only)
257 :    
258 :     I've improved the spill propagation algorithm, using an approximation
259 :     of maximal weighted independent sets. This seems to be necessary to
260 :     alleviate the negative effect in light of the slow down in (1).
261 :    
262 :     I'll write down the algorithm one of these days.
263 :    
264 :     8. MLRiscGen: frequencies
265 :    
266 :     I've added an annotation that states that all call gc blocks have zero
267 :     execution frequencies. This improves register allocation on the x86.
268 :    
269 :     BENCHMARKS
270 :     ==========
271 :    
272 :     I've only perform the comparison on 110.25.
273 :    
274 :     The platforms are:
275 :    
276 :     HPPA A four processor HP machine (E9000) with 5G of memory.
277 :     X86 A 300Hhz Pentium II with 128M of memory, and
278 :     SPARC An Ultra sparc 2 with 512M of memory.
279 :    
280 :     I used the following parameters for the SML benchmarks:
281 :    
282 :     @SMLalloc
283 :     HPPA 256k
284 :     SPARC 512k
285 :     X86 256k
286 :    
287 :     COMPILATION TIME
288 :     ----------------
289 :     Here are the numbers comparing the compilation times of the compilers.
290 :     I've only compared 110.25 compiling the new sources versus
291 :     a fixpoint version of the new compiler compiling the same.
292 :    
293 :     110.25 New
294 :     Total Time in RA Spill+Reload Total Time In RA Spill+Reload
295 :     HPPA 627s 116s 2684+3584 599s 95s 1003+1879
296 :     SPARC 892s 173s 2891+3870 708s 116s 1004+1880
297 :     X86 999s 315s 94006+130691 987s 296s 108877+141957
298 :    
299 :     110.25 New
300 :     Code Size Code Size
301 :     HPPA 8596736 8561421
302 :     SPARC 8974299 8785143
303 :     X86 9029180 8716783
304 :    
305 :     So in summary, things are at least as good as before. Dramatic
306 :     reduction in compilation is obtained on the Sparc; I can't explain it,
307 :     but it is reproducible. Perhaps someone should try to reproduce this
308 :     on their own machines.
309 :    
310 :     SML BENCHMARKS
311 :     --------------
312 :    
313 :     On the average, all benchmarks perform at least as well as before.
314 :    
315 :     HPPA Compilation Time Spill+Reload Run Time
316 :     110.25 New 110.25 New 110.25 New
317 :    
318 :     barnesHut 3.158 3.015 4.75% 1+1 0+0 2.980 2.922 2.00%
319 :     boyer 6.152 5.708 7.77% 0+0 0+0 0.218 0.213 2.34%
320 :     count-graphs 1.168 1.120 4.32% 0+0 0+0 22.705 23.073 -1.60%
321 :     fft 0.877 0.792 10.74% 1+3 1+3 0.602 0.587 2.56%
322 :     knuthBendix 3.180 2.857 11.32% 0+0 0+0 0.675 0.662 2.02%
323 :     lexgen 6.190 5.290 17.01% 0+0 0+0 0.913 0.788 15.86%
324 :     life 0.803 0.703 14.22% 25+25 0+0 0.153 0.140 9.52%
325 :     logic 2.048 2.007 2.08% 6+6 1+1 4.133 4.008 3.12%
326 :     mandelbrot 0.077 0.080 -4.17% 0+0 0+0 0.765 0.712 7.49%
327 :     mlyacc 22.932 20.937 9.53% 154+181 32+57 0.468 0.430 8.91%
328 :     nucleic 5.183 5.060 2.44% 2+2 0+0 0.125 0.120 4.17%
329 :     ratio-regions 3.357 3.142 6.84% 0+0 0+0 116.225 113.173 2.70%
330 :     ray 1.283 1.290 -0.52% 0+0 0+0 2.887 2.855 1.11%
331 :     simple 6.307 6.032 4.56% 28+30 5+7 3.705 3.658 1.28%
332 :     tsp 0.888 0.862 3.09% 0+0 0+0 7.040 6.893 2.13%
333 :     vliw 24.378 23.455 3.94% 106+127 25+45 2.758 2.707 1.91%
334 :     --------------------------------------------------------------------------
335 :     Average 6.12% 4.09%
336 :    
337 :     SPARC Compilation Time Spill+Reload Run Time
338 :     110.25 New 110.25 New 110.25 New
339 :    
340 :     barnesHut 3.778 3.592 5.20% 2+2 0+0 3.648 3.453 5.65%
341 :     boyer 6.632 6.110 8.54% 0+0 0+0 0.258 0.242 6.90%
342 :     count-graphs 1.435 1.325 8.30% 0+0 0+0 33.672 34.737 -3.07%
343 :     fft 0.980 0.940 4.26% 3+9 2+6 0.838 0.827 1.41%
344 :     knuthBendix 3.590 3.138 14.39% 0+0 0+0 0.962 0.967 -0.52%
345 :     lexgen 6.593 6.072 8.59% 1+1 0+0 1.077 1.078 -0.15%
346 :     life 0.972 0.868 11.90% 26+26 0+0 0.143 0.140 2.38%
347 :     logic 2.525 2.387 5.80% 7+7 1+1 5.625 5.158 9.05%
348 :     mandelbrot 0.090 0.093 -3.57% 0+0 0+0 0.855 0.728 17.39%
349 :     mlyacc 26.732 23.827 12.19% 162+189 32+57 0.550 0.560 -1.79%
350 :     nucleic 6.233 6.197 0.59% 3+3 0+0 0.163 0.173 -5.77%
351 :     ratio-regions 3.780 3.507 7.79% 0+0 0+0 133.993 131.035 2.26%
352 :     ray 1.595 1.550 2.90% 1+1 0+0 3.440 3.418 0.63%
353 :     simple 6.972 6.487 7.48% 29+32 5+7 3.523 3.525 -0.05%
354 :     tsp 1.115 1.063 4.86% 0+0 0+0 7.393 7.265 1.77%
355 :     vliw 27.765 24.818 11.87% 110+135 25+45 2.265 2.135 6.09%
356 :     ----------------------------------------------------------------------------
357 :     Average 6.94% 2.64%
358 :    
359 :     X86 Compilation Time Spill+Reload Run Time
360 :     110.25 New 110.25 New 110.25 New
361 :    
362 :     barnesHut 5.530 5.420 2.03% 593+893 597+915 3.532 3.440 2.66%
363 :     boyer 8.768 7.747 13.19% 493+199 301+289 0.327 0.297 10.11%
364 :     count-graphs 2.040 2.010 1.49% 298+394 315+457 26.578 28.660 -7.26%
365 :     fft 1.327 1.302 1.92% 112+209 115+210 1.055 0.962 9.71%
366 :     knuthBendix 5.218 5.475 -4.69% 451+598 510+650 0.928 0.932 -0.36%
367 :     lexgen 9.970 9.623 3.60% 1014+841 1157+885 0.947 0.928 1.97%
368 :     life 1.183 1.183 0.00% 162+182 145+148 0.127 0.103 22.58%
369 :     logic 3.285 3.512 -6.45% 514+684 591+836 5.682 5.577 1.88%
370 :     mandelbrot 0.147 0.143 2.33% 38+41 33+54 0.703 0.690 1.93%
371 :     mlyacc 35.457 32.763 8.22% 3496+4564 3611+4860 0.552 0.550 0.30%
372 :     nucleic 7.100 6.888 3.07% 239+168 201+158 0.175 0.173 0.96%
373 :     ratio-regions 6.388 6.843 -6.65% 1182+257 981+300 120.142 120.345 -0.17%
374 :     ray 2.332 2.338 -0.29% 346+398 402+494 3.593 3.540 1.51%
375 :     simple 9.912 9.903 0.08% 1475+941 1579+1168 3.057 3.178 -3.83%
376 :     tsp 1.623 1.532 5.98% 266+200 250+211 8.045 7.878 2.12%
377 :     vliw 33.947 35.470 -4.29% 2629+2774 2877+3171 2.072 1.890 9.61%
378 :     ----------------------------------------------------------------------------
379 :     Average 1.22% 3.36%
380 :    
381 :     ----------------------------------------------------------------------
382 :     Name: Allen Leung
383 : leunga 583 Date: 2000/03/23 16:25:00
384 :     Tag: leunga-20000323-fix_x86_alpha
385 :     Description:
386 :    
387 :     1. X86 fixes/changes
388 :    
389 :     a. The old code generated for SETcc was completely wrong.
390 :     The Intel optimization guide is VERY misleading.
391 :    
392 :     2. ALPHA fixes/changes
393 :    
394 :     a. Added the instructions LDBU, LDWU, STB, STW as per Fermin's suggestion.
395 :     b. Added a new mode byteWordLoadStores to the functor parameter to Alpha()
396 :     c. Added reassociation code for address computation.
397 :    
398 :     ----------------------------------------------------------------------
399 :     Name: Allen Leung
400 : leunga 580 Date: 2000/03/22 01:23:00
401 :     Tag: leunga-20000322-fix_x86_hppa_ra
402 :     Description:
403 :    
404 :     1. X86 fixes/changes
405 :    
406 :     a. x86Rewrite bug with MUL3 (found by Lal)
407 :     b. Added the instructions FSTS, FSTL
408 :    
409 :     2. PA-RISC fixes/changes
410 :    
411 :     a. B label should not be a delay slot candidate! Why did this work?
412 :     b. ADDT(32, REG(32, r), LI n) now generates one instruction instead of two,
413 :     as it should be.
414 :     c. The assembly syntax for fstds and fstdd was wrong.
415 :     d. Added the composite instruction COMICLR/LDO, which is the immediate
416 :     operand variant of COMCLR/LDO.
417 :    
418 :     3. Generic MLRISC
419 :    
420 :     a. shuffle.sml rewritten to be slightly more efficient
421 :     b. DIV bug in mltree-simplify fixed (found by Fermin)
422 :    
423 :     4. Register Allocator
424 :    
425 :     a. I now release the interference graph earlier during spilling.
426 :     May improve memory usage.
427 :    
428 :     ----------------------------------------------------------------------
429 : blume 577 Name: Matthias Blume
430 : blume 578 Date: 2000/03/14 14:15:32
431 :     Tag: blume_main_v110p26p1_2
432 :     Description:
433 :    
434 :     1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
435 :     additional argument called "template" which is an optional string that
436 :     specifiel the layout of the tool command line. See the CM manual for
437 :     explanation.
438 :    
439 :     2. A special-purpose tool can be "regisitered" by simply dropping the
440 :     corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
441 :     directory where the .cm file lives that uses this tool. (The
442 :     behavior/misfeature until now was to look for the tool description
443 :     files in the current working directory.) As before, tool description
444 :     files could also be anchored -- in which case they can live anywhere
445 :     they like. Following the recent e-mail discussion, this change should
446 :     make it easier to have special-purpose tools that are shipped together
447 :     with the sources of the program that uses them.
448 :    
449 :     ----------------------------------------------------------------------
450 :     Name: Matthias Blume
451 : blume 577 Date: 2000/03/10 07:48:34
452 :     Tag: blume_main_v110p26p1_1
453 :     Description:
454 :    
455 :     I added a re-written version of Dave's fixpt script to src/system.
456 :     Changes relative to the original version:
457 :     - sh-ified (not everybody has ksh)
458 :     - automatically figures out which architecture it runs on
459 :     - uses ./makeml a bit more cleverly
460 :     - never invokes ./installml (and, thus, does not clobber your
461 :     good and working installation of sml in case something goes wrong)
462 :     - accepts max iteration count using option "-iter <n>"
463 :     - accepts a "base" name using option "-base <base>"
464 :    
465 :     It does not build any extraneous heap images but directly rebuilds
466 :     bin- and boot-hierarchies using makeml's "-rebuild" switch. Finally,
467 :     it can incorporate existing bin- and boot- hierarchies. For example,
468 :     suppose the base is set to "sml" (which is the default). Then it
469 :     successively builds
470 :    
471 :     sml.bin.<arch>-unix and sml.boot.<arch>-unix
472 :     then sml1.bin.<arch>-unix and sml1.boot.<arch>-unix
473 :     then sml2.bin.<arch>-unix and sml2.boot.<arch>-unix
474 :     ...
475 :     then sml<n>.bin.<arch>-unix and sml<n>.boot.<arch>-unix
476 :    
477 :     and so on. If any of these already exist, it will just use what's
478 :     there. In particular, many people will have the initial set of bin
479 :     and boot files around, so this saves time for at least one full
480 :     rebuild. Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
481 :     <k>=1,2,... is normally not a good idea when invoking fixpt. However,
482 :     they might be the result of an earlier partial run of fixpt (which
483 :     perhaps got accidentially killed). In this case, fixpt will quickly
484 :     move through what exists before continuing where it left off earlier,
485 :     and, thus, saves a lot of time.
486 :    
487 :     ----------------------------------------------------------------------
488 : leunga 576 Name: Allen Leung
489 :     Date: 00/03/10 02:20:00
490 :     Tag: leunga-20000310-fix_x86_asm_ra
491 :     Description:
492 : dbm 570
493 : leunga 576 More assembly output problems involving the indexed addressing mode
494 :     on the x86 have been found and corrected. Thanks to Fermin Reig for the
495 :     fix.
496 :    
497 :     The interface and implementation of the register allocator have been changed
498 :     slightly to accommodate the possibility to skip the register allocation
499 :     phases completely and go directly to memory allocation. This is needed
500 :     for C-- use.
501 :    
502 : dbm 570 ----------------------------------------------------------------------
503 : blume 572 Name: Matthias Blume
504 : blume 575 Date: 00/03/09 10:23:53
505 :     Tag: blume_main_v110p26p1_0
506 :     Description:
507 :    
508 :     * Complete re-organization of library names. Many libraries have been
509 :     consolidated so that they share the same path anchor. For example,
510 :     all MLRISC-related libraries are anchored at MLRISC, most libraries that
511 :     are SML/NJ-specific are under "smlnj". Notice that names like
512 :     host-cmb.cm or host-compiler.cm no longer exist. See system/README
513 :     for a complete description of the new naming scheme. Quick reference:
514 :    
515 :     host-cmb.cm -> smlnj/cmb.cm
516 :     host-compiler.cm -> smlnj/compiler.cm
517 :     full-cm.cm -> smlnj/cm.cm
518 :     <arch>-<os>.cm -> smlnj/cmb/<arch>-<os>.cm
519 :     <arch>-compiler.cm -> smlnj/compiler/<arch>.cm
520 :    
521 :     * Bug fixes in CM.
522 :     - exceptions in user code are being passed through (i.e., reach top level)
523 :     - more bugs in paranoia mode fixed
524 :     - bug related to checking group owners fixed
525 :    
526 :     * New install.sh script that automagically fetches archive files:
527 :     The new file config/srcarchiveurl must contain the URL of the
528 :     (remote) directory that contains bin files (or other source archives).
529 :     If install.sh does not find the archive locally, it tries to get
530 :     it from that remote directory.
531 :     This should simplify installation further: For machines that have
532 :     access to the internet, just fetch <version>-config.tgz, unpack it,
533 :     edit config/targets, and go (run config/install.sh). The scipt will
534 :     fetch everything else that it might need all by itself.
535 :    
536 :     For CVS users, this mechanism is not relevant for source archives, but
537 :     it is convenient for getting new sets of binfiles.
538 :    
539 :     Archives should be tar files compressed with either gzip, compress, or
540 :     bzip2. The script recognizes .tgz, .tar, tar.gz, tz, .tar.Z, and .tar.bz2.
541 :    
542 :     ----------------------------------------------------------------------
543 :     Name: Matthias Blume
544 : blume 572 Date: 2000/03/07 04:01:04
545 :     Tag: blume_main_v110_26_2
546 : dbm 570 Description:
547 : blume 572 - size info in BOOTLIST
548 :     * no fixed upper limits for number of bootfiles or length of
549 :     bootfile names in runtime
550 :     * falling back to old behavior if no BOOTLIST size info found
551 :     - allocation size heuristics in .run-sml
552 :     * tries to read cache size from /proc/cpuinfo (this is important for
553 :     small-cache Celeron systems!)
554 :     - install.sh robustified
555 :     - CM manual updates
556 :     - paranoid mode
557 :     * no more CMB.deliver() (i.e., all done by CMB.make())
558 :     * can re-use existing sml.boot.* files
559 :     * init.cmi now treated as library
560 :     * library stamps for consistency checks
561 :     - sml.boot.<arch>-<os>/PIDMAP file
562 :     * This file is read by the CM startup code. This is used to minimize
563 :     the amount of dynamic state that needs to be stowed away for the
564 :     purpose of sharing between interactive system and user code.
565 :     - CM.Anchor.anchor instead of CM.Anchor.{set,cancel}
566 :     * Upon request by Elsa. Anchors now controlled by get-set-pair
567 :     like most other CM state variables.
568 :     - Compiler.CMSA eliminated
569 :     * No longer supported by CM anyway.
570 :     - fixed bugs in pickler that kept biting Stefan
571 :     * past refs to past refs (was caused by the possibility that
572 :     ad-hoc sharing is more discriminating than hash-cons sharing)
573 :     * integer overflow on LargeInt.minInt
574 :     - ml-{lex,yacc} build scripts now use new mechanism
575 :     for building standalone programs
576 :     - fixed several gcc -Wall warnings that were caused by missing header
577 :     files, missing initializations, etc., in runtime (not all warnings
578 :     eliminated, though)

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