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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	591	----------------------------------------------------------------------
15 :	blume	595	Name: Matthias Blume
16 :			Date: 2000/04/05 12:30:00 JST
17 :			Tag: blume_main_v110p26p2_3
18 :			Description:
19 :
20 :			This update just merges three minor cosmetic updates to CM's sources
21 :			to get ready for the 110.27 code freeze on Friday. No functionality
22 :			has changed.
23 :
24 :			----------------------------------------------------------------------
25 :	leunga	593	Name: Allen Leung
26 :	leunga	594	Date: 2000/04/04 19:39:00 EST
27 :			Tag: leunga-20000404-x86-asm
28 :			Description:
29 :
30 :			1. Fixed a problem in X86 assembly.
31 :
32 :			Things like
33 :
34 :			jmp %eax
35 :			jmp (%eax)
36 :
37 :			should be output as
38 :
39 :			jmp *%eax
40 :			jmp *(%eax)
41 :
42 :			2. Assembly output
43 :
44 :			Added a new flag
45 :
46 :			"asm-indent-copies" (default to false)
47 :
48 :			When this flag is on, parallel copies will be indented an extra level.
49 :
50 :			----------------------------------------------------------------------
51 :			Name: Allen Leung
52 :	leunga	593	Date: 2000/04/04 03:18:00 EST
53 :			Tag: leunga-20000404-C--Moby
54 :			Description:
55 :
56 :			All of these fixes are related to C--, Moby, and my own optimization
57 :			stuff; so they shouldn't affect SML/NJ.
58 :
59 :			1. X86
60 :
61 :			Various fixes related floating point, and extensions.
62 :
63 :			2. Alpha
64 :
65 :			Some extra patterns related to loads with signed/zero extension
66 :			provided by Fermin.
67 :
68 :			3. Assembly
69 :
70 :			When generating assemby, resolve the value of client defined constants,
71 :			instead of generating symbolic values. This is controlled by the
72 :			new flag "asm-resolve-constants", which is default to true.
73 :
74 :			4. Machine Descriptions
75 :
76 :			a. The precedence parser was slightly broken when parsing infixr symbols.
77 :			b. The type generalizing code had the bound variables reversed, resulting
78 :			in a problem during arity raising.
79 :			c. Various fixes in machine descriptions.
80 :
81 :			----------------------------------------------------------------------
82 :	blume	592	Name: Matthias Blume
83 :			Date: 2000/04/03 16:05:00 JST
84 :			Tag: blume_main_v110p26p2_2
85 :			Description:
86 :
87 :			I eliminated coreEnv from compInfo. Access to the "Core" structure is
88 :			now done via the ordinary static environment that is context to each
89 :			compilation unit.
90 :
91 :			To this end, I arranged that instead of "structure Core" as "structure
92 :			_Core" is bound in the pervasive environment. Core access is done via
93 :			_Core (which can never be accidentially rebound because _Core is not a
94 :			legal surface-syntax symbol).
95 :
96 :			The current solution is much cleaner because the core environment is
97 :			now simply part of the pervasive environment which is part of every
98 :			compilation unit's context anyway. In particular, this eliminates all
99 :			special-case handling that was necessary until now in order to deal
100 :			with dynamic and symbolic parts of the core environment.
101 :
102 :			Remaining hackery (to bind the "magic" symbol _Core) is localized in the
103 :			compilation mananger's bootstrap compiler (actually: in the "init group"
104 :			handling). See the comments in src/system/smlnj/init/init.cmi for
105 :			more details.
106 :
107 :			I also tried to track down all mentions of "Core" (as string argument
108 :			to Symbol.strSymbol) in the compiler and replaced them with a
109 :			reference to the new CoreSym.coreSym. Seems cleaner since the actual
110 :			name appears in one place only.
111 :
112 :			Binfile and bootfile format have not changed, but the switchover from
113 :			the old "init.cmi" to the new one is a bit tricky, so I supplied new
114 :			bootfiles anyway.
115 :
116 :			----------------------------------------------------------------------
117 :	leunga	591	Name: Allen Leung
118 :			Date: 2000/04/02 21:17:00 EST
119 :			Tag: leunga-20000402-mltree
120 :			Description:
121 :	leunga	585
122 :	leunga	591	1. Renamed the constructor CALL in MLTREE by popular demand.
123 :			2. Added a bunch of files from my repository. These are currently
124 :			used by other non-SMLNJ backends.
125 :
126 :	leunga	576	----------------------------------------------------------------------
127 :	leunga	590	Name: Allen Leung
128 :			Date: 2000/03/31 21:15:00 EST
129 :			Tag: leunga-20000331-aliasing
130 :			Description:
131 :
132 :			This update contains a rewritten (and hopefully more correct) module
133 :			for extracting aliasing information from CPS.
134 :
135 :			To turn on this feature:
136 :
137 :			Compiler.Control.CG.memDisambiguate := true
138 :
139 :			To pretty print the region information with assembly
140 :
141 :			Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
142 :
143 :			To control how many levels of aliasing information are printed, use:
144 :
145 :			Compiler.Control.MLRISC.getInt "points-to-show-level" := n
146 :
147 :			The default of n is 3.
148 :
149 :			----------------------------------------------------------------------
150 :	dbm	589	Name: David MacQueen
151 :			Date: 2000/03/31 11:15:00 EST
152 :			Tag: dbm-20000331-runtime_fix
153 :			Description:
154 :
155 :			This update contains:
156 :
157 :			1. runtime/c-lib/c-libraries.c
158 :			includes added in revision 1.2 caused compilation errors on hppa-hpux
159 :
160 :			2. fix for bug 1556
161 :			system/Basis/Implementation/NJ/internal-signals.sml
162 :
163 :			----------------------------------------------------------------------
164 :	blume	587	Name: Matthias Blume
165 :	blume	588	Date: 2000/03/31 18:00:00 JST
166 :			Tag: blume_main_v110p26p2_1
167 :			Description:
168 :
169 :			This update contains:
170 :
171 :			1. A small change to CM's handling of stable libraries:
172 :			CM now maintains one "global" modmap that is used for all stable
173 :			libraries. The use of such a global modmap maximizes sharing and
174 :			minimizes the need for re-traversing parts of environments during
175 :			modmap construction. (However, this has minor impact since modmap
176 :			construction seems to account for just one percent or less of total
177 :			compile time.)
178 :
179 :			2. I added a "genmap" phase to the statistics. This is where I got the
180 :			"one percent" number (see above).
181 :
182 :			3. CM's new tool parameter mechanism just became _even_ better. :)
183 :			- The parser understands named parameters and recursive options.
184 :			- The "make" and "shell" tools use these new features.
185 :			(This makes it a lot easier to cascade these tools.)
186 :			- There is a small syntax change: named parameters use a
187 :
188 :			<name> : ( <option> ... ) or
189 :			<name> : <string>
190 :
191 :			syntax. Previously, named parameters were implemented in an
192 :			ad-hoc fashion by each tool individually (by parsing strings)
193 :			and had the form
194 :
195 :			<name>=<string>
196 :
197 :			See the CM manual for a full description of these issues.
198 :
199 :			----------------------------------------------------------------------
200 :			Name: Matthias Blume
201 :	blume	587	Date: 2000/03/30 18:00:00 JST
202 :			Tag: blume_main_v110p26p2_0
203 :			Description:
204 :
205 :			!!!!! WARNING !!!!!!
206 :			!! New binfiles !!
207 :			!!!!!!!!!!!!!!!!!!!!
208 :
209 :			This update contains:
210 :
211 :			1. Moderate changes to CM:
212 :
213 :			- Changes to CM's tools mechanism. In particular, it is now possible
214 :			to have tools that accept additional "command line" parameters
215 :			(specified in the .cm file at each instance where the tool's class is
216 :			used).
217 :
218 :			This was done to accomodate the new "make" and "shell" tools which
219 :			facilitate fairly seemless hookup to portions of code managed using
220 :			Makefiles or Shell scripts.
221 :
222 :			There are no classes "shared" or "private" anymore. Instead, the
223 :			sharing annotation is now a parameter to the "sml" class.
224 :
225 :			There is a bit of generic machinery for implementing one's own
226 :			tools that accept command-line parameters. However, I am not yet fully
227 :			satisfied with that part, so expect changes here in the future.
228 :
229 :			All existing tools are described in the CM manual.
230 :
231 :			- Slightly better error handling. (CM now surpresses many followup
232 :			error messages that tended to be more annoying than helpful.)
233 :
234 :			2. Major changes to the compiler's static environment data structures.
235 :
236 :			- no CMStaticEnv anymore.
237 :			- no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
238 :			but it is called Environment), no conversions between different
239 :			kinds of static environments
240 :
241 :			- There is still a notion of a "modmap", but such modmaps are generated
242 :			on demand at the time when they are needed. This sounds slow, but I
243 :			sped up the code that generates modmaps enough for this not to lead to
244 :			a slowdown of the compiler (at least I didn't detect any).
245 :
246 :			- To facilitate rapid modmap generation, static environments now
247 :			contain an (optional) "modtree" structure. Modtree annotations are
248 :			constructed by the unpickler during unpickling. (This means that
249 :			the elaborator does not have to worry about modtrees at all.)
250 :			Modtrees have the advantage that they are compositional in the same
251 :			way as the environment data structure itself is compositional.
252 :			As a result, modtrees never hang on to parts of an environment that
253 :			has already been rendered "stale" by filtering or rebinding.
254 :
255 :			- I went through many, many trials and errors before arriving at the
256 :			current solution. (The initial idea of "linkpaths" did not work.)
257 :			But the result of all this is that I have touched a lot of files that
258 :			depend on the "modules" and "types" data structures (most of the
259 :			elaborator). There were a lot of changes during my "linkpath" trials
260 :			that could have been reverted to their original state but weren't.
261 :			Please, don't be too harsh on me for messing with this code a bit more
262 :			than what was strictly necessary... (I _did_ resist the tempation
263 :			of doing any "global reformatting" to avoid an untimely death at
264 :			Dave's hands. :)
265 :
266 :			- One positive aspect of the previous point: At least I made sure that
267 :			all files that I touched now compile without warnings (other than
268 :			"polyEqual").
269 :
270 :			- compiler now tends to run "leaner" (i.e., ties up less memory in
271 :			redundant modmaps)
272 :
273 :			----------------------------------------------------------------------
274 :	leunga	580	Name: Allen Leung
275 :	leunga	585	Date: 2000/03/29 18:00:00
276 :			Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
277 :	leunga	586	Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
278 :	leunga	585	Description:
279 :
280 :			This update contains *MAJOR* changes to the way code is generated from CPS
281 :			in the module mlriscGen, and in various backend modules.
282 :
283 :			CHANGES
284 :			=======
285 :
286 :			1. MLRiscGen: forward propagation fix.
287 :
288 :			There was a bug in forward propagation introduced at about the same time
289 :			as the MLRISC x86 backend, which prohibits coalescing to be
290 :			performed effectively in loops.
291 :
292 :			Effect: speed up of loops in RISC architectures.
293 :			By itself, this actually slowed down certain benchmarks on the x86.
294 :
295 :			2. MLRiscGen: forward propagating addresses from consing.
296 :
297 :			I've changed the way consing code is generated. Basically I separated
298 :			out the initialization part:
299 :
300 :			store tag, offset(allocptr)
301 :			store elem1, offset+4(allocptr)
302 :			store elem2, offset+8(allocptr)
303 :			...
304 :			store elemn, offset+4n(allocptr)
305 :
306 :			and the address computation part:
307 :
308 :			celladdr <- offset+4+alloctpr
309 :
310 :			and move the address computation part
311 :
312 :			Effect: register pressure is generally lower as a result. This
313 :			makes compilation of certain expressions much faster, such as
314 :			long lists with non-trivial elements.
315 :
316 :			[(0,0), (0,0), .... (0,0)]
317 :
318 :			3. MLRiscGen: base pointer elimination.
319 :
320 :			As part of the linkage mechanism, we generate the sequence:
321 :
322 :			L: ... <- start of the code fragment
323 :
324 :			L1:
325 :			base pointer <- linkreg - L1 + L
326 :
327 :			The base pointer was then used for computing relocatable addresses
328 :			in the code fragment. Frequently (such as in lots of continuations)
329 :			this is not needed. We now eliminate this sequence whenever possible.
330 :
331 :			For compile time efficiency, I'm using a very stupid local heuristic.
332 :			But in general, this should be done as a control flow analysis.
333 :
334 :			Effect: Smaller code size. Speed up of most programs.
335 :
336 :			4. Hppa back end
337 :
338 :			Long jumps in span dependence resolution used to depend on the existence
339 :			of the base pointer.
340 :
341 :			A jump to a long label L was expanded into the following sequence:
342 :
343 :			LDIL %hi(L-8192), %r29
344 :			LDO %lo(L-8192)(%r29), %r29
345 :			ADD %r29, baseptr, %r29
346 :			BV,n %r0(%r29)
347 :
348 :			In the presence of change (3) above, this will not work. I've changed
349 :			it so that the following sequence of instructions are generated, which
350 :			doesn't mention the base pointer at all:
351 :
352 :			BL,n L', %r29 /* branch and link, L' + 4 -> %r29 */
353 :			L': ADDIL L-(L'+4), %r29 /* Compute address of L */
354 :			BV,n %r0(%r29) /* Jump */
355 :
356 :			5. Alpha back end
357 :
358 :			New alpha instructions LDB/LDW have been added, as per Fermin's
359 :			suggestions. This is unrelated to all other changes.
360 :
361 :			6. X86 back end
362 :
363 :			I've changed andl to testl in the floating point test sequence
364 :			whenever appropriate. The Intel optimization guide states that
365 :			testl is perferable to andl.
366 :
367 :			7. RA (x86 only)
368 :
369 :			I've improved the spill propagation algorithm, using an approximation
370 :			of maximal weighted independent sets. This seems to be necessary to
371 :			alleviate the negative effect in light of the slow down in (1).
372 :
373 :			I'll write down the algorithm one of these days.
374 :
375 :			8. MLRiscGen: frequencies
376 :
377 :			I've added an annotation that states that all call gc blocks have zero
378 :			execution frequencies. This improves register allocation on the x86.
379 :
380 :			BENCHMARKS
381 :			==========
382 :
383 :			I've only perform the comparison on 110.25.
384 :
385 :			The platforms are:
386 :
387 :			HPPA A four processor HP machine (E9000) with 5G of memory.
388 :			X86 A 300Hhz Pentium II with 128M of memory, and
389 :			SPARC An Ultra sparc 2 with 512M of memory.
390 :
391 :			I used the following parameters for the SML benchmarks:
392 :
393 :			@SMLalloc
394 :			HPPA 256k
395 :			SPARC 512k
396 :			X86 256k
397 :
398 :			COMPILATION TIME
399 :			----------------
400 :			Here are the numbers comparing the compilation times of the compilers.
401 :			I've only compared 110.25 compiling the new sources versus
402 :			a fixpoint version of the new compiler compiling the same.
403 :
404 :			110.25 New
405 :			Total Time in RA Spill+Reload Total Time In RA Spill+Reload
406 :			HPPA 627s 116s 2684+3584 599s 95s 1003+1879
407 :			SPARC 892s 173s 2891+3870 708s 116s 1004+1880
408 :			X86 999s 315s 94006+130691 987s 296s 108877+141957
409 :
410 :			110.25 New
411 :			Code Size Code Size
412 :			HPPA 8596736 8561421
413 :			SPARC 8974299 8785143
414 :			X86 9029180 8716783
415 :
416 :			So in summary, things are at least as good as before. Dramatic
417 :			reduction in compilation is obtained on the Sparc; I can't explain it,
418 :			but it is reproducible. Perhaps someone should try to reproduce this
419 :			on their own machines.
420 :
421 :			SML BENCHMARKS
422 :			--------------
423 :
424 :			On the average, all benchmarks perform at least as well as before.
425 :
426 :			HPPA Compilation Time Spill+Reload Run Time
427 :			110.25 New 110.25 New 110.25 New
428 :
429 :			barnesHut 3.158 3.015 4.75% 1+1 0+0 2.980 2.922 2.00%
430 :			boyer 6.152 5.708 7.77% 0+0 0+0 0.218 0.213 2.34%
431 :			count-graphs 1.168 1.120 4.32% 0+0 0+0 22.705 23.073 -1.60%
432 :			fft 0.877 0.792 10.74% 1+3 1+3 0.602 0.587 2.56%
433 :			knuthBendix 3.180 2.857 11.32% 0+0 0+0 0.675 0.662 2.02%
434 :			lexgen 6.190 5.290 17.01% 0+0 0+0 0.913 0.788 15.86%
435 :			life 0.803 0.703 14.22% 25+25 0+0 0.153 0.140 9.52%
436 :			logic 2.048 2.007 2.08% 6+6 1+1 4.133 4.008 3.12%
437 :			mandelbrot 0.077 0.080 -4.17% 0+0 0+0 0.765 0.712 7.49%
438 :			mlyacc 22.932 20.937 9.53% 154+181 32+57 0.468 0.430 8.91%
439 :			nucleic 5.183 5.060 2.44% 2+2 0+0 0.125 0.120 4.17%
440 :			ratio-regions 3.357 3.142 6.84% 0+0 0+0 116.225 113.173 2.70%
441 :			ray 1.283 1.290 -0.52% 0+0 0+0 2.887 2.855 1.11%
442 :			simple 6.307 6.032 4.56% 28+30 5+7 3.705 3.658 1.28%
443 :			tsp 0.888 0.862 3.09% 0+0 0+0 7.040 6.893 2.13%
444 :			vliw 24.378 23.455 3.94% 106+127 25+45 2.758 2.707 1.91%
445 :			--------------------------------------------------------------------------
446 :			Average 6.12% 4.09%
447 :
448 :			SPARC Compilation Time Spill+Reload Run Time
449 :			110.25 New 110.25 New 110.25 New
450 :
451 :			barnesHut 3.778 3.592 5.20% 2+2 0+0 3.648 3.453 5.65%
452 :			boyer 6.632 6.110 8.54% 0+0 0+0 0.258 0.242 6.90%
453 :			count-graphs 1.435 1.325 8.30% 0+0 0+0 33.672 34.737 -3.07%
454 :			fft 0.980 0.940 4.26% 3+9 2+6 0.838 0.827 1.41%
455 :			knuthBendix 3.590 3.138 14.39% 0+0 0+0 0.962 0.967 -0.52%
456 :			lexgen 6.593 6.072 8.59% 1+1 0+0 1.077 1.078 -0.15%
457 :			life 0.972 0.868 11.90% 26+26 0+0 0.143 0.140 2.38%
458 :			logic 2.525 2.387 5.80% 7+7 1+1 5.625 5.158 9.05%
459 :			mandelbrot 0.090 0.093 -3.57% 0+0 0+0 0.855 0.728 17.39%
460 :			mlyacc 26.732 23.827 12.19% 162+189 32+57 0.550 0.560 -1.79%
461 :			nucleic 6.233 6.197 0.59% 3+3 0+0 0.163 0.173 -5.77%
462 :			ratio-regions 3.780 3.507 7.79% 0+0 0+0 133.993 131.035 2.26%
463 :			ray 1.595 1.550 2.90% 1+1 0+0 3.440 3.418 0.63%
464 :			simple 6.972 6.487 7.48% 29+32 5+7 3.523 3.525 -0.05%
465 :			tsp 1.115 1.063 4.86% 0+0 0+0 7.393 7.265 1.77%
466 :			vliw 27.765 24.818 11.87% 110+135 25+45 2.265 2.135 6.09%
467 :			----------------------------------------------------------------------------
468 :			Average 6.94% 2.64%
469 :
470 :			X86 Compilation Time Spill+Reload Run Time
471 :			110.25 New 110.25 New 110.25 New
472 :
473 :			barnesHut 5.530 5.420 2.03% 593+893 597+915 3.532 3.440 2.66%
474 :			boyer 8.768 7.747 13.19% 493+199 301+289 0.327 0.297 10.11%
475 :			count-graphs 2.040 2.010 1.49% 298+394 315+457 26.578 28.660 -7.26%
476 :			fft 1.327 1.302 1.92% 112+209 115+210 1.055 0.962 9.71%
477 :			knuthBendix 5.218 5.475 -4.69% 451+598 510+650 0.928 0.932 -0.36%
478 :			lexgen 9.970 9.623 3.60% 1014+841 1157+885 0.947 0.928 1.97%
479 :			life 1.183 1.183 0.00% 162+182 145+148 0.127 0.103 22.58%
480 :			logic 3.285 3.512 -6.45% 514+684 591+836 5.682 5.577 1.88%
481 :			mandelbrot 0.147 0.143 2.33% 38+41 33+54 0.703 0.690 1.93%
482 :			mlyacc 35.457 32.763 8.22% 3496+4564 3611+4860 0.552 0.550 0.30%
483 :			nucleic 7.100 6.888 3.07% 239+168 201+158 0.175 0.173 0.96%
484 :			ratio-regions 6.388 6.843 -6.65% 1182+257 981+300 120.142 120.345 -0.17%
485 :			ray 2.332 2.338 -0.29% 346+398 402+494 3.593 3.540 1.51%
486 :			simple 9.912 9.903 0.08% 1475+941 1579+1168 3.057 3.178 -3.83%
487 :			tsp 1.623 1.532 5.98% 266+200 250+211 8.045 7.878 2.12%
488 :			vliw 33.947 35.470 -4.29% 2629+2774 2877+3171 2.072 1.890 9.61%
489 :			----------------------------------------------------------------------------
490 :			Average 1.22% 3.36%
491 :
492 :			----------------------------------------------------------------------
493 :			Name: Allen Leung
494 :	leunga	583	Date: 2000/03/23 16:25:00
495 :			Tag: leunga-20000323-fix_x86_alpha
496 :			Description:
497 :
498 :			1. X86 fixes/changes
499 :
500 :			a. The old code generated for SETcc was completely wrong.
501 :			The Intel optimization guide is VERY misleading.
502 :
503 :			2. ALPHA fixes/changes
504 :
505 :			a. Added the instructions LDBU, LDWU, STB, STW as per Fermin's suggestion.
506 :			b. Added a new mode byteWordLoadStores to the functor parameter to Alpha()
507 :			c. Added reassociation code for address computation.
508 :
509 :			----------------------------------------------------------------------
510 :			Name: Allen Leung
511 :	leunga	580	Date: 2000/03/22 01:23:00
512 :			Tag: leunga-20000322-fix_x86_hppa_ra
513 :			Description:
514 :
515 :			1. X86 fixes/changes
516 :
517 :			a. x86Rewrite bug with MUL3 (found by Lal)
518 :			b. Added the instructions FSTS, FSTL
519 :
520 :			2. PA-RISC fixes/changes
521 :
522 :			a. B label should not be a delay slot candidate! Why did this work?
523 :			b. ADDT(32, REG(32, r), LI n) now generates one instruction instead of two,
524 :			as it should be.
525 :			c. The assembly syntax for fstds and fstdd was wrong.
526 :			d. Added the composite instruction COMICLR/LDO, which is the immediate
527 :			operand variant of COMCLR/LDO.
528 :
529 :			3. Generic MLRISC
530 :
531 :			a. shuffle.sml rewritten to be slightly more efficient
532 :			b. DIV bug in mltree-simplify fixed (found by Fermin)
533 :
534 :			4. Register Allocator
535 :
536 :			a. I now release the interference graph earlier during spilling.
537 :			May improve memory usage.
538 :
539 :			----------------------------------------------------------------------
540 :	blume	577	Name: Matthias Blume
541 :	blume	578	Date: 2000/03/14 14:15:32
542 :			Tag: blume_main_v110p26p1_2
543 :			Description:
544 :
545 :			1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
546 :			additional argument called "template" which is an optional string that
547 :			specifiel the layout of the tool command line. See the CM manual for
548 :			explanation.
549 :
550 :			2. A special-purpose tool can be "regisitered" by simply dropping the
551 :			corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
552 :			directory where the .cm file lives that uses this tool. (The
553 :			behavior/misfeature until now was to look for the tool description
554 :			files in the current working directory.) As before, tool description
555 :			files could also be anchored -- in which case they can live anywhere
556 :			they like. Following the recent e-mail discussion, this change should
557 :			make it easier to have special-purpose tools that are shipped together
558 :			with the sources of the program that uses them.
559 :
560 :			----------------------------------------------------------------------
561 :			Name: Matthias Blume
562 :	blume	577	Date: 2000/03/10 07:48:34
563 :			Tag: blume_main_v110p26p1_1
564 :			Description:
565 :
566 :			I added a re-written version of Dave's fixpt script to src/system.
567 :			Changes relative to the original version:
568 :			- sh-ified (not everybody has ksh)
569 :			- automatically figures out which architecture it runs on
570 :			- uses ./makeml a bit more cleverly
571 :			- never invokes ./installml (and, thus, does not clobber your
572 :			good and working installation of sml in case something goes wrong)
573 :			- accepts max iteration count using option "-iter <n>"
574 :			- accepts a "base" name using option "-base <base>"
575 :
576 :			It does not build any extraneous heap images but directly rebuilds
577 :			bin- and boot-hierarchies using makeml's "-rebuild" switch. Finally,
578 :			it can incorporate existing bin- and boot- hierarchies. For example,
579 :			suppose the base is set to "sml" (which is the default). Then it
580 :			successively builds
581 :
582 :			sml.bin.<arch>-unix and sml.boot.<arch>-unix
583 :			then sml1.bin.<arch>-unix and sml1.boot.<arch>-unix
584 :			then sml2.bin.<arch>-unix and sml2.boot.<arch>-unix
585 :			...
586 :			then sml<n>.bin.<arch>-unix and sml<n>.boot.<arch>-unix
587 :
588 :			and so on. If any of these already exist, it will just use what's
589 :			there. In particular, many people will have the initial set of bin
590 :			and boot files around, so this saves time for at least one full
591 :			rebuild. Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
592 :			<k>=1,2,... is normally not a good idea when invoking fixpt. However,
593 :			they might be the result of an earlier partial run of fixpt (which
594 :			perhaps got accidentially killed). In this case, fixpt will quickly
595 :			move through what exists before continuing where it left off earlier,
596 :			and, thus, saves a lot of time.
597 :
598 :			----------------------------------------------------------------------
599 :	leunga	576	Name: Allen Leung
600 :			Date: 00/03/10 02:20:00
601 :			Tag: leunga-20000310-fix_x86_asm_ra
602 :			Description:
603 :	dbm	570
604 :	leunga	576	More assembly output problems involving the indexed addressing mode
605 :			on the x86 have been found and corrected. Thanks to Fermin Reig for the
606 :			fix.
607 :
608 :			The interface and implementation of the register allocator have been changed
609 :			slightly to accommodate the possibility to skip the register allocation
610 :			phases completely and go directly to memory allocation. This is needed
611 :			for C-- use.
612 :
613 :	dbm	570	----------------------------------------------------------------------
614 :	blume	572	Name: Matthias Blume
615 :	blume	575	Date: 00/03/09 10:23:53
616 :			Tag: blume_main_v110p26p1_0
617 :			Description:
618 :
619 :			* Complete re-organization of library names. Many libraries have been
620 :			consolidated so that they share the same path anchor. For example,
621 :			all MLRISC-related libraries are anchored at MLRISC, most libraries that
622 :			are SML/NJ-specific are under "smlnj". Notice that names like
623 :			host-cmb.cm or host-compiler.cm no longer exist. See system/README
624 :			for a complete description of the new naming scheme. Quick reference:
625 :
626 :			host-cmb.cm -> smlnj/cmb.cm
627 :			host-compiler.cm -> smlnj/compiler.cm
628 :			full-cm.cm -> smlnj/cm.cm
629 :			<arch>-<os>.cm -> smlnj/cmb/<arch>-<os>.cm
630 :			<arch>-compiler.cm -> smlnj/compiler/<arch>.cm
631 :
632 :			* Bug fixes in CM.
633 :			- exceptions in user code are being passed through (i.e., reach top level)
634 :			- more bugs in paranoia mode fixed
635 :			- bug related to checking group owners fixed
636 :
637 :			* New install.sh script that automagically fetches archive files:
638 :			The new file config/srcarchiveurl must contain the URL of the
639 :			(remote) directory that contains bin files (or other source archives).
640 :			If install.sh does not find the archive locally, it tries to get
641 :			it from that remote directory.
642 :			This should simplify installation further: For machines that have
643 :			access to the internet, just fetch <version>-config.tgz, unpack it,
644 :			edit config/targets, and go (run config/install.sh). The scipt will
645 :			fetch everything else that it might need all by itself.
646 :
647 :			For CVS users, this mechanism is not relevant for source archives, but
648 :			it is convenient for getting new sets of binfiles.
649 :
650 :			Archives should be tar files compressed with either gzip, compress, or
651 :			bzip2. The script recognizes .tgz, .tar, tar.gz, tz, .tar.Z, and .tar.bz2.
652 :
653 :			----------------------------------------------------------------------
654 :			Name: Matthias Blume
655 :	blume	572	Date: 2000/03/07 04:01:04
656 :			Tag: blume_main_v110_26_2
657 :	dbm	570	Description:
658 :	blume	572	- size info in BOOTLIST
659 :			* no fixed upper limits for number of bootfiles or length of
660 :			bootfile names in runtime
661 :			* falling back to old behavior if no BOOTLIST size info found
662 :			- allocation size heuristics in .run-sml
663 :			* tries to read cache size from /proc/cpuinfo (this is important for
664 :			small-cache Celeron systems!)
665 :			- install.sh robustified
666 :			- CM manual updates
667 :			- paranoid mode
668 :			* no more CMB.deliver() (i.e., all done by CMB.make())
669 :			* can re-use existing sml.boot.* files
670 :			* init.cmi now treated as library
671 :			* library stamps for consistency checks
672 :			- sml.boot.<arch>-<os>/PIDMAP file
673 :			* This file is read by the CM startup code. This is used to minimize
674 :			the amount of dynamic state that needs to be stowed away for the
675 :			purpose of sharing between interactive system and user code.
676 :			- CM.Anchor.anchor instead of CM.Anchor.{set,cancel}
677 :			* Upon request by Elsa. Anchors now controlled by get-set-pair
678 :			like most other CM state variables.
679 :			- Compiler.CMSA eliminated
680 :			* No longer supported by CM anyway.
681 :			- fixed bugs in pickler that kept biting Stefan
682 :			* past refs to past refs (was caused by the possibility that
683 :			ad-hoc sharing is more discriminating than hash-cons sharing)
684 :			* integer overflow on LargeInt.minInt
685 :			- ml-{lex,yacc} build scripts now use new mechanism
686 :			for building standalone programs
687 :			- fixed several gcc -Wall warnings that were caused by missing header
688 :			files, missing initializations, etc., in runtime (not all warnings
689 :			eliminated, though)

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