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Revision 1009 - (view) (download)

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 :	george	1003	Date: yyyy/mm/dd
12 :	dbm	570	Tag: <post-commit CVS tag>
13 :			Description:
14 :	george	1003	----------------------------------------------------------------------
15 :			Name: Lal George
16 :	george	1009	Date: 2001/01/09 14:31:35 EST 2002
17 :			Tag: george-20011206-rm-native-copy
18 :			Description:
19 :
20 :			Removed the native COPY and FCOPY instructions
21 :			from all the architectures and replaced it with the
22 :			explicit COPY instruction from the previous commit.
23 :
24 :			It is now possible to simplify many of the optimizations
25 :			modules that manipulate copies. This has not been
26 :			done in this change.
27 :
28 :			----------------------------------------------------------------------
29 :			Name: Lal George
30 :	george	1003	Date: 2001/12/06 16:50:13 EST 2001
31 :			Tag: george-20011206-mlrisc-instruction
32 :			Description:
33 :	george	824
34 :	george	1003	Changed the representation of instructions from being fully abstract
35 :			to being partially concrete. That is to say:
36 :
37 :			from
38 :			type instruction
39 :
40 :			to
41 :			type instr (* machine instruction *)
42 :
43 :			datatype instruction =
44 :			LIVE of {regs: C.cellset, spilled: C.cellset}
45 :			| KILL of {regs: C.cellset, spilled: C.cellset}
46 :			| COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
47 :			| ANNOTATION of {i: instruction, a: Annotations.annotation}
48 :			| INSTR of instr
49 :
50 :			This makes the handling of certain special instructions that appear on
51 :			all architectures easier and uniform.
52 :
53 :			LIVE and KILL say that a list of registers are live or killed at the
54 :			program point where they appear. No spill code is generated when an
55 :			element of the 'regs' field is spilled, but the register is moved to
56 :			the 'spilled' (which is present, more for debugging than anything else).
57 :
58 :			LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
59 :			We used to generate:
60 :
61 :			DEFFREG f1
62 :			f1 := f2 + f3
63 :			trapb
64 :
65 :			but now generate:
66 :
67 :			f1 := f2 + f3
68 :			trapb
69 :			LIVE {regs=[f1,f2,f3], spilled=[]}
70 :
71 :			Furthermore, the DEFFREG (hack) required that all floating point instruction
72 :			use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
73 :			defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
74 :			in a cleaner alpha implementation. (Hopefully, intel will not get rid of
75 :			this architecture).
76 :
77 :			COPYXXX is intended to replace the parallel COPY and FCOPY available on
78 :			all the architectures. This will result in further simplification of the
79 :			register allocator that must be aware of them for coalescing purposes, and
80 :			will also simplify certain aspects of the machine description that provides
81 :			callbacks related to parallel copies.
82 :
83 :			ANNOTATION should be obvious, and now INSTR represents the honest to God
84 :			machine instruction set!
85 :
86 :			The <arch>/instructions/<arch>Instr.sml files define certain utility
87 :			functions for making porting easier -- essentially converting upper case
88 :			to lower case. All machine instructions (of type instr) are in upper case,
89 :			and the lower case form generates an MLRISC instruction. For example on
90 :			the alpha we have:
91 :
92 :			datatype instr =
93 :			LDA of {r:cell, b:cell, d:operand}
94 :			| ...
95 :
96 :			val lda : {r:cell, b:cell, d:operand} -> instruction
97 :			...
98 :
99 :			where lda is just (INSTR o LDA), etc.
100 :
101 :	leunga	815	----------------------------------------------------------------------
102 :	blume	986	Name: Matthias Blume
103 :	blume	993	Date: 2001/11/22 21:40:00 EST
104 :			Tag: Release_110_37
105 :			Description:
106 :
107 :			Release 110.37. This time for real.
108 :
109 :			----------------------------------------------------------------------
110 :			Name: Matthias Blume
111 :	blume	988	Date: 2001/11/21 16:35:00 EST
112 :			Tag: blume-20011121-foot-in-mouth
113 :			Description:
114 :
115 :			Removed the "Release_110_37" tag because of a serious bug.
116 :			This will be re-tagged once the bug is fixed.
117 :
118 :			----------------------------------------------------------------------
119 :			Name: Matthias Blume
120 :	blume	987	Date: 2001/11/21 16:14:00 EST
121 :			Tag: blume-20011121-forgottenfile
122 :			Description:
123 :
124 :			Forgot to add a file. (Just a .tex-file -- part of
125 :			the CM manual source.)
126 :
127 :			----------------------------------------------------------------------
128 :			Name: Matthias Blume
129 :	blume	986	Date: 2001/11/21 16:10:00 EST
130 :	blume	988	Tag: blume-20011121-invalid_110_37
131 :	blume	986	Description:
132 :
133 :	blume	988	Note: I removed the original tag "Release_110_37" from this commit
134 :			because we found a serious bug in all non-x86 backends.
135 :			- Matthias
136 :
137 :	blume	986	1. Modifications to the SML/NJ code generator and to the runtime system
138 :			so that code object name strings are directly inserted into code
139 :			objects at code generation time. The only business the runtime system
140 :			has with this is now to read the name strings on occasions.
141 :			(The encoding of the name string has also changed somewhat.)
142 :
143 :			2. CM now implements a simple "set calculus" for specifying export lists.
144 :			In particular, it is now possible to refer to the export lists of
145 :			other libraries/groups/sources and form unions as well as differences.
146 :			See the latest CM manual for details.
147 :
148 :			3. An separate notion of "proxy" libraries has again be eliminated from
149 :			CM's model. (Proxy libraries are now simply a special case of using
150 :			the export list calculus.)
151 :
152 :			4. Some of the existing libraries now take advantage of the new set
153 :			calculus.
154 :			(Notice that not all libraries have been converted because some
155 :			of the existing .cm-files are supposed to be backward compatible
156 :			with 110.0.x.)
157 :
158 :			5. Some cleanup in stand-alone programs. (Don't use "exnMessage" -- use
159 :			"General.exnMessage"! The former relies on a certain hook to be
160 :			initialized, and that often does not happen in the stand-alone case.)
161 :
162 :			----------------------------------------------------------------------
163 :	george	984	Name: Lal George
164 :			Date: 2001/11/21 13:56:18 EST
165 :			Tag: george-2001121-pseudo-ops
166 :			Description:
167 :
168 :			Implemented a complete redesign of MLRISC pseudo-ops. Now there
169 :			ought to never be any question of incompatabilities with
170 :			pseudo-op syntax expected by host assemblers.
171 :
172 :			For now, only modules supporting GAS syntax are implemented
173 :			but more should follow, such as MASM, and vendor assembler
174 :			syntax, e.g. IBM as, Sun as, etc.
175 :
176 :			----------------------------------------------------------------------
177 :	blume	977	Name: Matthias Blume
178 :			Date: 2001/11/14 11:52:00 EST
179 :			Tag: blume-20011114-srcname
180 :			Description:
181 :
182 :			1. Routed the name of the current source file to mlriscgen where it
183 :			should be directly emitted into the code object. (This last part
184 :			is yet to be done.)
185 :
186 :			2. Some cleanup of the pgraph code to make it match the proposal that
187 :			I put out the other day. (The proposal notwithstanding, things are
188 :			still in flux here.)
189 :
190 :			----------------------------------------------------------------------
191 :	george	976	Name: Lal George
192 :			Date: 2001/11/14 09:44:04 EST
193 :			Tag:
194 :			Description:
195 :
196 :			Fix for a backpatching bug reported by Allen.
197 :
198 :			Because the boundary between short and long span-dependent
199 :			instructions is +/- 128, there are an astounding number of
200 :			span-dependent instructions whose size is over estimated.
201 :
202 :			Allen came up with the idea of letting the size of span
203 :			dependent instructions be non-monotonic, for a maxIter
204 :			number of times, after which the size must be monotonically
205 :			increasing.
206 :
207 :			This table shows the number of span-dependent instructions
208 :			whose size was over-estimated as a function of maxIter, for the
209 :			file Parse/parse/ml.grm.sml:
210 :
211 :			maxIter # of instructions:
212 :			10 687
213 :			20 438
214 :			30 198
215 :			40 0
216 :
217 :			In compiling the compiler, there is no significant difference in
218 :			compilation speed between maxIter=10 and maxIter=40. Actually,
219 :			my measurements showed that maxIter=40 was a tad faster than
220 :			maxIter=10! Also 96% of the files in the compiler reach a fix
221 :			point within 13 iterations, so fixing maxIter at 40, while high,
222 :			is okay.
223 :
224 :			----------------------------------------------------------------------
225 :	blume	975	Name: Matthias Blume
226 :			Date: 2001/10/31 15:25:00 EST
227 :			Tag: blume-20011031-pgraph
228 :			Description:
229 :
230 :			CKIT:
231 :			* Changed the "Function" constructor of type Ast.ctype to carry optional
232 :			argument identifiers.
233 :			* Changed the return type of TypeUtil.getFunction accordingly.
234 :			* Type equality ignores the argument names.
235 :			* TypeUtil.composite tries to preserve argument names but gives up quickly
236 :			if there is a mismatch.
237 :
238 :			installation script:
239 :			* attempts to use "curl" if available (unless "wget" is available as well)
240 :
241 :			CM:
242 :			* has an experimental implementation of "portable graphs" which I will
243 :			soon propose as an implementation-independent library format
244 :			* there are also new libraries $/pgraph.cm and $/pgraph-util.cm
245 :
246 :			NLFFI-LIB:
247 :			* some cleanup (all cosmetic)
248 :
249 :			NLFFIGEN:
250 :			* temporarily disabled the mechanism that suppresses ML output for
251 :			C definitions whose identifiers start with an underscore character
252 :			* generate val bindings for enum constants
253 :			* user can request that only one style (light or heavy) is being used;
254 :			default is to use both (command-line arguments: -heavy and -light)
255 :			* fixed bug in handling of function types involving incomplete pointers
256 :			* generate ML entry points that take record arguments (i.e., using
257 :			named arguments) for C functions that have a prototype with named
258 :			arguments
259 :			(see changes to CKIT)
260 :
261 :			----------------------------------------------------------------------
262 :	leunga	972	Name: Allen Leung
263 :			Date: 2001/10/27 20:34:00 EDT
264 :			Tag: leunga-20011027-x86-fast-fp-call
265 :			Description:
266 :
267 :			Fixed the bug described in blume-20010920-slowfp.
268 :
269 :			The fix involves
270 :			1. generating FCOPYs in FSTP in ia32-svid
271 :			2. marking a CALL with the appropriate annotation
272 :
273 :			----------------------------------------------------------------------
274 :	blume	961	Name: Matthias Blume
275 :			Date: 2001/10/16 11:32:00 EDT
276 :			Tag: blume-20011016-netbsd
277 :			Description:
278 :
279 :			Underscore patch from Chris Richards (fixing problem with compiling
280 :			runtime system under recent NetBSD).
281 :
282 :			----------------------------------------------------------------------
283 :	george	959	Name: Allen Leung
284 :			Date: 2001/10/12 17:18:32 EDT 2001
285 :			Tag: leung-20011012-x86-printflowgraph
286 :			Description:
287 :
288 :			X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
289 :
290 :			----------------------------------------------------------------------
291 :	george	952	Name: Lal George
292 :	george	958	Date: 2001/10/11 23:51:34 EDT
293 :			Tag: george-20011011-too-many-instrs
294 :			Description:
295 :
296 :			The representation of a program point never expected to see more
297 :			than 65536 instructions in a basic block!
298 :
299 :			----------------------------------------------------------------------
300 :			Name: Lal George
301 :	george	952	Date: 2001/10/09 09:41:37 EDT
302 :			Tag: george-20011008-mlrisc-labels
303 :			Description:
304 :
305 :			Changed the machine description files to support printing of
306 :			local and global labels in assembly code, based on host assembler
307 :			conventions.
308 :
309 :			----------------------------------------------------------------------
310 :	blume	916	Name: Matthias Blume
311 :	blume	939	Date: 2001/09/25 15:25:00 EDT
312 :			Tag: blume-20010925-exninfo
313 :			Description:
314 :
315 :			I provided a non-hook implementation of exnName (at the toplevel) and
316 :			made the "dummy" implementation of exnMessage (at the toplevel) more
317 :			useful: if nothing gets "hooked in", then at least you are going to
318 :			see the exception name and a message indicating why you don't see more.
319 :
320 :			[For the time being, programs that need exnMessage and want to use
321 :			ml-build should either use General.exnMessage (strongly recommended) or
322 :			refer to structure General at some other point so that CM sees a
323 :			static dependency.]
324 :
325 :			[Similar remarks go for "print" and "use": If you want to use their
326 :			functionality in stand-alone programs generated by ml-build, then use
327 :			TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
328 :
329 :			----------------------------------------------------------------------
330 :			Name: Matthias Blume
331 :	blume	938	Date: 2001/09/20 17:28:00 EDT
332 :			Tag: blume-20010920-slowfp
333 :			Description:
334 :
335 :			Allen says that x86-fast-fp is not safe yet, so I turned it off again...
336 :
337 :			----------------------------------------------------------------------
338 :			Name: Matthias Blume
339 :	blume	937	Date: 2001/09/20 17:20:00 EDT
340 :			Tag: blume-20010920-canonicalpaths
341 :			Description:
342 :
343 :			0. Updated the BOOT file (something that I forgot to do earlier).
344 :
345 :			1. Small internal change to CM so that it avoids "/../" in filenames
346 :			as much as possible (but only where it is safe).
347 :
348 :			2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
349 :			that arguments that contain delimiters are passed through correctly.
350 :			This change also means that all "special" arguments of the form
351 :			@SMLxxx... must come first.
352 :
353 :			3. Changed install script to put relative anchor names for tool commands
354 :			into pathconfig.
355 :
356 :			----------------------------------------------------------------------
357 :			Name: Matthias Blume
358 :	george	952	>>>>>>> 1.169
359 :	blume	932	Date: 2001/09/18 15:35:00 EDT
360 :			Tag: blume-20010918-readme11036
361 :			Description:
362 :
363 :			Added README files.
364 :
365 :			----------------------------------------------------------------------
366 :			Name: Matthias Blume
367 :	blume	929	Date: 2001/09/18 11:45:00 EDT
368 :			Tag: Release_110_36 (retag)
369 :			Description:
370 :
371 :			Fixed mistake in config/preloads. Retagged as 110.36.
372 :
373 :			----------------------------------------------------------------------
374 :			Name: Matthias Blume
375 :	blume	928	Date: 2001/09/18 09:40:00 EDT
376 :	blume	929	Tag: Release_110_36_orig (tag changed)
377 :	blume	928	Description:
378 :
379 :			New version (110.36). New bootfiles.
380 :
381 :			----------------------------------------------------------------------
382 :			Name: Matthias Blume
383 :	blume	927	Date: 2001/09/14 16:15:00 EDT
384 :			Tag: blume-20010914-x86fastfp
385 :			Description:
386 :
387 :			John committed some changes that Allen made, in particular a (hopefully)
388 :			correctly working version of the x86-fp module.
389 :
390 :			I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
391 :			flag to "true". Everything seems to compile to a fixpoint ok, and
392 :			"mandelbrot" speeds up by about 15%.
393 :
394 :			----------------------------------------------------------------------
395 :			Name: Matthias Blume
396 :	blume	923	Date: 2001/09/13 11:20:00 EDT
397 :			Tag: blume-20010913-minimal
398 :			Description:
399 :
400 :			1. Stefan Monnier's patch to fix a miscompilation problem that
401 :			was brought to light by John Reppy's work on Moby.
402 :
403 :			2. Implemented a minimal "structure Compiler" that contains just
404 :			"version" and "architecture". The minimal version will be
405 :			available when the full version is not. This is for backward-
406 :			compatibility with code that wants to test Compiler.version.
407 :
408 :			----------------------------------------------------------------------
409 :			Name: Matthias Blume
410 :	blume	920	Date: 2001/08/28 14:03:00 EDT
411 :			Tag: blume-20010828-ml-lex
412 :			Description:
413 :
414 :			Fix for bug 1581, received from Neophytos Michael.
415 :
416 :			----------------------------------------------------------------------
417 :			Name: Matthias Blume
418 :	blume	918	Date: 2001/08/27 11:20:00 EDT
419 :			Tag: blume-20010827-readme11035
420 :			Description:
421 :
422 :			Fleshed out the README file for 110.35.
423 :
424 :			----------------------------------------------------------------------
425 :			Name: Matthias Blume
426 :	blume	916	Date: 2001/08/24 17:10:00 EDT
427 :			Tag: Release_110_35
428 :			Description:
429 :
430 :			New version number (110.35). New bootfiles.
431 :
432 :			----------------------------------------------------------------------
433 :	george	915	Name: Lal George
434 :	george	909	Date: 2001/08/24 13:47:18 EDT 2001
435 :			Tag: george-20010824-MLRISC-graphs
436 :			Description:
437 :
438 :			removed clusters from MLRISC completely and replaced with graphs.
439 :
440 :			----------------------------------------------------------------------
441 :			Name: Matthias Blume
442 :	blume	905	Date: 2001/08/23 17:50:00 EDT
443 :			Tag: blume-20010823-toplevel
444 :			Description:
445 :
446 :			- some reorganization of the code that implements various kinds of
447 :			environments in the compiler (static, dynamic, symbolic, combined)
448 :			- re-implemented the EnvRef module so that evalStream works properly
449 :			(if the stream contains references to "use", "CM.make", etc.)
450 :			- cleaned up evalloop.sml and interact.sml (but they need more cleaning)
451 :
452 :			----------------------------------------------------------------------
453 :			Name: Matthias Blume
454 :	blume	904	Date: 2001/08/20 15:50 EDT
455 :			Tag: blume20010820-slipup
456 :			Description:
457 :
458 :			I forgot to commit a few files. Here they are...
459 :
460 :			----------------------------------------------------------------------
461 :			Name: Matthias Blume
462 :	blume	903	Date: 2001/08/20 15:35:00 EDT
463 :			Tag: blume-20010820-debugprof
464 :			Description:
465 :
466 :			!!!! NEW BOOTFILES !!!!
467 :
468 :			This is another round of reorganizing the compiler sources. This
469 :			time the main goal was to factor out all the "instrumentation"
470 :			passes (for profiling and backtracing) into their own library.
471 :			The difficulty was to do it in such a way that it does not depend
472 :			on elaborate.cm but only on elabdata.cm.
473 :
474 :			Therefore there have been further changes to both elaborate.cm and
475 :			elabdata.cm -- more "generic" things have been moved from the former
476 :			to the latter. As a result, I was forced to split the assignment
477 :			of numbers indicating "primtyc"s into two portions: SML-generic and
478 :			SML/NJ-specific. Since it would have been awkward to maintain,
479 :			I bit the bullet and actually _changed_ the mapping between these
480 :			numbers and primtycs. The bottom line of this is that you need
481 :			a new set of bin- and bootfiles.
482 :
483 :			I have built new bootfiles for all architectures, so doing a fresh
484 :			checkout and config/install.sh should be all you need.
485 :
486 :			The newly created library's name is
487 :
488 :			$smlnj/viscomp/debugprof.cm
489 :
490 :			and its sources live under
491 :
492 :			src/compiler/DebugProf
493 :
494 :			----------------------------------------------------------------------
495 :			Name: Matthias Blume
496 :	blume	902	Date: 2001/08/15 17:15:00 EDT
497 :			Tag: blume-20010815-compreorg
498 :			Description:
499 :
500 :			This is a first cut at reorganizing the CM libraries that make up the
501 :			core of the compiler. The idea is to separate out pieces that could
502 :			be used independently by tools, e.g., the parser, the typechecker, etc.
503 :
504 :			The current status is a step in this direction, but it is not quite
505 :			satisfactory yet. Expect more changes in the future.
506 :
507 :			Here is the current (new) organization...
508 :
509 :			What used to be $smlnj/viscomp/core.cm is now divided into
510 :			six CM libraries:
511 :
512 :			$smlnj/viscomp/basics.cm
513 :			/parser.cm
514 :			/elabdata.cm
515 :			/elaborate.cm
516 :			/execute.cm
517 :			/core.cm
518 :
519 :			The CM files for these libraries live under src/system/smlnj/viscomp.
520 :			All these libraries are proxy libraries that contain precisely
521 :			one CM library component. Here are the locations of the components
522 :			(all within the src/compiler tree):
523 :
524 :			Basics/basics.cm
525 :			Parse/parser.cm
526 :			ElabData/elabdata.cm
527 :			Elaborator/elaborate.cm
528 :			Execution/execute.cm
529 :			core.cm
530 :
531 :			[This organization is the same that has been used already
532 :			for a while for the architecture-specific parts of the visible
533 :			compiler and for the old version of core.cm.]
534 :
535 :			As you will notice, many source files have been moved from their
536 :			respective original locations to a new home in one of the above
537 :			subtrees.
538 :
539 :			The division of labor between the new libraries is the following:
540 :
541 :			basics.cm:
542 :			- Simple, basic definitions that pertain to many (or all) of
543 :			the other libraries.
544 :			parser.cm:
545 :			- The SML parser, producing output of type Ast.dec.
546 :			- The type family for Ast is also defined and exported here.
547 :			elabdata.cm:
548 :			- The datatypes that describe input and output of the elaborator.
549 :			This includes types, absyn, and static environments.
550 :			elaborator.cm:
551 :			- The SML/NJ type checker and elaborator.
552 :			This maps an Ast.dec (with a given static environment) to
553 :			an Absyn.dec (with a new static environment).
554 :			- This libraries implements certain modules that used to be
555 :			structures as functors (to remove dependencies on FLINT).
556 :			execute.cm:
557 :			- Everything having to do with executing binary code objects.
558 :			- Dynamic environments.
559 :			core.cm:
560 :			- SML/NJ-specific instantiations of the elaborator and MLRISC.
561 :			- Top-level modules.
562 :			- FLINT (this should eventually become its own library)
563 :
564 :			Notes:
565 :
566 :			I am not 100% happy with the way I separated the elaborator (and its
567 :			data structures) from FLINT. Two instances of the same problem:
568 :
569 :			1. Data structures contain certain fields that carry FLINT-specific
570 :			information. I hacked around this using exn and the property list
571 :			module from smlnj-lib. But the fact that there are middle-end
572 :			specific fields around at all is a bit annoying.
573 :
574 :			2. The elaborator calculates certain FLINT-related information. I tried
575 :			to make this as abstract as I could using functorization, but, again,
576 :			the fact that the elaborator has to perform calculations on behalf
577 :			of the middle-end at all is not nice.
578 :
579 :			3. Having to used exn and property lists is unfortunate because it
580 :			weakens type checking. The other alternative (parameterizing
581 :			nearly *everything*) is not appealing, though.
582 :
583 :			I removed the "rebinding =" warning hack because due to the new organization
584 :			it was awkward to maintain it. As a result, the compiler now issues some of
585 :			these warnings when compiling init.cmi during bootstrap compilation. On
586 :			the plus side, you also get a warning when you do, for example:
587 :			val op = = Int32.+
588 :			which was not the case up to now.
589 :
590 :			I placed "assign" and "deref" into the _Core structure so that the
591 :			code that deals with the "lazy" keyword can find them there. This
592 :			removes the need for having access to the primitive environment
593 :			during elaboration.
594 :
595 :			----------------------------------------------------------------------
596 :			Name: Matthias Blume
597 :	blume	898	Date: 2001/08/13
598 :			Tag: blume-20010813-closures
599 :			Description:
600 :
601 :			This fix was sent to us by Zhong Shao. It is supposed to improve the
602 :			performance of certain loops by avoiding needless closure allocation.
603 :
604 :			----------------------------------------------------------------------
605 :	george	890	Name: Lal George
606 :	george	896	Date: 2001/07/31 10:03:23 EDT 2001
607 :			Tag: george-20010731-x86-fmalloc
608 :			Description: Fixed bug in x86 calls
609 :
610 :			There was a bug where call instructions would mysteriously
611 :			vanish. The call instruction had to be one that returned
612 :			a floating point value.
613 :
614 :			----------------------------------------------------------------------
615 :			Name: Lal George
616 :	george	890	Date: 2001/07/19 16:36:29 EDT 2001
617 :			Tag: george-20010719-simple-cells
618 :			Description:
619 :
620 :			I have dramatically simplified the interface for CELLS in MLRISC.
621 :
622 :			In summary, the cells interface is broken up into three parts:
623 :
624 :			1. CellsBasis : CELLS_BASIS
625 :
626 :			CellsBasis is a top level structure and common for all
627 :			architectures. it contains the definitions of basic datatypes
628 :			and utility functions over these types.
629 :
630 :			2. functor Cells() : CELLS
631 :
632 :			Cells generates an interface for CELLS that incorporates the
633 :			specific resources on the target architecture, such as the
634 :			presence of special register classes, their number and size,
635 :			and various useful substructures.
636 :
637 :			3. <ARCH>CELLS
638 :
639 :			e.g. SparcCells: SPARCCELLS
640 :
641 :			<ARCH>CELLS usually contains additional bindings for special
642 :			registers on the architecture, such as:
643 :
644 :			val r0 : cell (* register zero *)
645 :			val y : cell (* Y register *)
646 :			val psr : cell (* processor status register *)
647 :			...
648 :
649 :			The structure returned by applying the Cells functor is opened
650 :			in this interface.
651 :
652 :			The main implication of all this is that the datatypes for cells is
653 :			split between CellsBasis and CELLS -- a fairly simple change for user
654 :			code.
655 :
656 :			In the old scheme the CELLS interface had a definitional binding of
657 :			the form:
658 :
659 :			signature CELLS = sig
660 :
661 :			structure CellsBasis = CellsBasis
662 :
663 :			...
664 :
665 :			end
666 :
667 :			With all the sharing constraints that goes on in MLRISC, this old
668 :			design quickly leads to errors such as:
669 :
670 :			"structure definition spec inside of sharing ... "
671 :
672 :
673 :			and appears to require an unacceptable amount of sharing and where
674 :			constraint hackery.
675 :
676 :			I think this error message (the interaction of definitional specs and
677 :			sharing) requires more explanation on our web page.
678 :
679 :			----------------------------------------------------------------------
680 :	blume	826	Name: Matthias Blume
681 :	blume	879	Date: 2001/07/19 15:00:00 EDT
682 :			Tag: blume-20010719-libreorg
683 :			Description:
684 :
685 :			This update puts together a fairly extensive but straightforward change
686 :			to the way the libraries that implement the interactive system are
687 :			organized:
688 :
689 :			The biggest change is the elimination of structure Compiler. As a
690 :			replacement for this structure, there is now a CM library
691 :			(known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
692 :			that exports all the substructures of the original structure Compiler
693 :			directly. So instead of saying Compiler.Foo.bar one now simply
694 :			says Foo.bar. (The CM libraries actually export a collection of
695 :			structures that is richer than the collection of substructures of
696 :			structure Compiler.)
697 :
698 :			To make the transition smooth, there is a separate library called
699 :			$smlnj/compiler/compiler.cm which puts together and exports the
700 :			original structure Compiler (or at least something very close to it).
701 :
702 :			There are five members of the original structure Compiler
703 :			that are not exported directly but which instead became members
704 :			of a new structure Backend (described by signature BACKEND). These are:
705 :			structure Profile (: PROFILE), structure Compile (: COMPILE), structure
706 :			Interact (: INTERACT), structure Machine (: MACHINE), and val
707 :			architecture (: string).
708 :
709 :			Structure Compiler.Version has become structure CompilerVersion.
710 :
711 :			Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
712 :			by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
713 :			or x86, respectively.
714 :			Each of these exports the same frontend structures that
715 :			$smlnj/compiler.cm exports. But they do not have a structure Backend
716 :			and instead export some structure <Arch>Backend where <Arch> is Alpha32,
717 :			Hppa, PPC, Sparc, or X86, respectively.
718 :
719 :			Library $smlnj/compiler/all.cm exports the union of the exports of
720 :			$smlnj/compiler/<arch>.cm
721 :
722 :			There are no structures <Arch>Compiler anymore, use
723 :			$smlnj/compiler/<arch>.cm instead.
724 :
725 :			Library host-compiler-0.cm is gone. Instead, the internal library
726 :			that instantiates CM is now called cm0.cm. Selection of the host
727 :			compiler (backend) is no longer done here but. (Responsibility for it
728 :			now lies with $smlnj/compiler/current.cm. This seems to be more
729 :			logical.)
730 :
731 :			Many individual files have been moved or renamed. Some files have
732 :			been split into multiple files, and some "dead" files have been deleted.
733 :
734 :			Aside from these changes to library organization, there are also changes
735 :			to the way the code itself is organized:
736 :
737 :			Structure Binfile has been re-implemented in such a way that it no
738 :			longer needs any knowledge of the compiler. It exclusively deals
739 :			with the details of binfile layout. It no longer invokes the
740 :			compiler (for the purpose of creating new prospective binfile
741 :			content), and it no longer has any knowledge of how to interpret
742 :			pickles.
743 :
744 :			Structure Compile (: COMPILE) has been stripped down to the bare
745 :			essentials of compilation. It no longer deals with linking/execution.
746 :			The interface has been cleaned up considerably.
747 :
748 :			Utility routines for dealing with linking and execution have been
749 :			moved into their own substructures.
750 :
751 :			(The ultimate goal of these changes is to provide a light-weight
752 :			binfile loader/linker (at least for, e.g., stable libraries) that
753 :			does not require CM or the compiler to be present.)
754 :
755 :			CM documentation has been updated to reflect the changes to library
756 :			organization.
757 :
758 :			----------------------------------------------------------------------
759 :			Name: Matthias Blume
760 :	blume	875	Date: 2001/07/10 17:30:00 EDT
761 :			Tag: Release_110_34
762 :			Description:
763 :
764 :	blume	876	Minor tweak to 110.34 (re-tagged):
765 :
766 :			- README.html file added to CVS repository
767 :			- runtime compiles properly under FreeBSD 3.X and 4.X
768 :
769 :			----------------------------------------------------------------------
770 :			Name: Matthias Blume
771 :			Date: 2001/07/10 17:30:00 EDT
772 :			Tag: Release_110_34
773 :			Description:
774 :
775 :	blume	875	New version number (110.34). New bootfiles.
776 :
777 :			----------------------------------------------------------------------
778 :			Name: Matthias Blume
779 :	blume	874	Date: 2001/07/09 16:00:00 EDT
780 :			Tag: blume-20010709-more-varargs
781 :			Description:
782 :
783 :			I changed the handling of varargs in ml-nlffigen again:
784 :			The ellipsis ... will now simply be ignored (with an accompanying warning).
785 :
786 :			The immediate effect is that you can actually call a varargs function
787 :			from ML -- but you can't actually supply any arguments beyond the ones
788 :			specified explicitly. (For example, you can call printf with its format
789 :			string, but you cannot pass additional arguments.)
790 :
791 :			This behavior is only marginally more useful than the one before, but
792 :			it has the advantage that a function or, more importantly, a function
793 :			type never gets dropped on the floor, thus avoiding follow-up problems with
794 :			other types that refer to the offending one.
795 :
796 :			----------------------------------------------------------------------
797 :			Name: Matthias Blume
798 :	blume	873	Date: 2001/07/09 11:25:00 EDT
799 :			Tag: blume-20010709-varargs
800 :			Description:
801 :
802 :			1. ckit-lib.cm now exports structure Error
803 :			2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
804 :			with a warning accompanied by a source location. Moreover, it
805 :			merely skips the offending function or type and proceeds with the
806 :			rest of its work.u As a result, one can safely feed C code containing
807 :			"..." to ml-nlffigen.
808 :			3. There are some internal improvements to CM, providing slightly
809 :			more general string substitutions in the tools subsystem.
810 :
811 :			----------------------------------------------------------------------
812 :			Name: Matthias Blume
813 :	blume	854	Date: 2001/06/27 15:10:00 EDT
814 :			Tag: blume-20010627-concur
815 :			Description:
816 :
817 :			Fixed a small bug in CM's handling of parallel compilation.
818 :			(You could observe the bug by Control-C-interrupting an ordinary
819 :			CMB.make or CM.stabilize and then attaching some compile servers.
820 :			The result was that all of a sudden the previously interrupted
821 :			compilation would continue on its own. This was because of
822 :			an over-optimization: CM did not bother to clean out certain queues
823 :			when no servers were attached "anyway", resulting in the contents
824 :			of these queues to grab control when new servers did get attached.)
825 :
826 :			There is also another minor update to the CM manual.
827 :
828 :			----------------------------------------------------------------------
829 :			Name: Matthias Blume
830 :	blume	853	Date: 2001/06/26 16:15:00 EDT
831 :			Tag: blume-20010626-cmdoc
832 :			Description:
833 :
834 :			Minor typo fixed in CM manual (syntax diagram for libraries).
835 :
836 :			----------------------------------------------------------------------
837 :			Name: Matthias Blume
838 :	blume	852	Date: 2001/06/25 22:55:00 EDT
839 :			Tag: blume-20010625-x86pc
840 :			Description:
841 :
842 :			Fixed a nasty bug in the X86 assembly code that caused signal
843 :			handlers to fail (crash) randomly.
844 :
845 :			----------------------------------------------------------------------
846 :			Name: Matthias Blume
847 :	blume	846	Date: 2001/06/25 12:05:00 EDT
848 :			Tag: blume-20010625-nlffigen
849 :			Description:
850 :
851 :			This update fixes a number of minor bugs in ml-nlffigen as reported by
852 :			Nick Carter <nbc@andrew.cmu.edu>.
853 :
854 :			1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
855 :			2. Default names for generated files are now derived from the name of
856 :			the C file *without its directory*. In particular, this causes generated
857 :			files to be placed locally even if the C file is in some system directory.
858 :			3. Default names for generated signatures and structures are also derived
859 :			from the C file name without its directory. This avoids silly things
860 :			like "structure GL/GL".
861 :			(Other silly names are still possible because ml-nlffigen does not do
862 :	blume	847	a thorough check of whether generated names are legal ML identifiers.
863 :			When in doubt, use command line arguments to force particular names.)
864 :	blume	846
865 :			----------------------------------------------------------------------
866 :			Name: Matthias Blume
867 :	blume	845	Date: 2001/06/21 12:25:00 EDT
868 :			Tag: blume-20010621-eXene
869 :			Description:
870 :
871 :			eXene now compiles and (sort of) works again.
872 :
873 :			The library name (for version > 110.33) is $/eXene.cm.
874 :
875 :			I also added an new example in src/eXene/examples/nbody. See the
876 :			README file there for details.
877 :
878 :			----------------------------------------------------------------------
879 :			Name: Matthias Blume
880 :	blume	844	Date: 2001/06/20 16:40:00 EDT
881 :			Tag: blume-20010620-cml
882 :			Description:
883 :
884 :			CML now compiles and works again.
885 :
886 :			Libraries (for version > 110.33):
887 :
888 :			$cml/cml.cm Main CML library.
889 :			$cml/basis.cm CML's version of $/basis.cm.
890 :			$cml/cml-internal.cm Internal helper library.
891 :			$cml/core-cml.cm Internal helper library.
892 :			$cml-lib/trace-cml.cm Tracing facility.
893 :			$cml-lib/smlnj-lib.cm CML's version of $/smlnj-lib.cm
894 :
895 :			The installer (config/install.sh) has been taught how to properly
896 :			install this stuff.
897 :
898 :			----------------------------------------------------------------------
899 :			Name: Matthias Blume
900 :	blume	843	Date: 2001/06/19 17:55:00 EDT
901 :			Tag: blume-20010619-instantiate
902 :			Description:
903 :
904 :			This un-breaks the fix for bug 1432.
905 :			(The bug was originally fixed in 110.9 but I broke it again some
906 :			time after that.)
907 :
908 :			----------------------------------------------------------------------
909 :			Name: Matthias Blume
910 :	blume	842	Date: 2001/06/19 17:25:00 EDT
911 :			Tag: blume-20010619-signals
912 :			Description:
913 :
914 :			This should (hopefully) fix the long-standing signal handling bug.
915 :			(The runtime system was constructing a continuation record with an
916 :			incorrect descriptor which would cause the GC to drop data on the floor...)
917 :
918 :			----------------------------------------------------------------------
919 :			Name: Matthias Blume
920 :	blume	840	Date: 2001/06/15 15:05:00 EDT
921 :	blume	841	Tag: blume-20010615-moresparc
922 :			Description:
923 :
924 :			Here is a short late-hour update related to Sparc c-calls:
925 :
926 :			-- made handling of double-word arguments a bit smarter
927 :
928 :			-- instruction selection phase tries to collapse certain clumsily
929 :			constructed ML-Trees; typical example:
930 :
931 :			ADD(ty,ADD(_,e,LI d1),LI d2) -> ADD(ty,e,LI(d1+d2))
932 :
933 :			This currently has no further impact on SML/NJ since mlriscGen does
934 :			not seem to generate such patterns in the first place, and c-calls
935 :			(which did generate them in the beginning) has meanwhile been fixed
936 :			so as to avoid them as well.
937 :
938 :			----------------------------------------------------------------------
939 :			Name: Matthias Blume
940 :			Date: 2001/06/15 15:05:00 EDT
941 :	blume	840	Tag: blume-20010615-sparc
942 :			Description:
943 :
944 :			The purpose of this update is to provide an implementation of NLFFI
945 :			on Sparc machines.
946 :
947 :			Here are the changes in detail:
948 :
949 :			* src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
950 :			the Sparc implementation of the c-calls API.
951 :			* The Sparc backend of SML/NJ has been modified to uniformely use %fp
952 :			for accessing the ML frame. Thus, we have a real frame pointer and
953 :			can freely modify %sp without need for an omit-frame-ptr phase.
954 :			The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
955 :			this case.
956 :			* ml-nlffigen has been taught to produce code for different architectures
957 :			and calling conventions.
958 :			* In a way similar to what was done in the x86 case, the Sparc
959 :			backend uses its own specific extension to mltree. (For example,
960 :			it needs to be able to generate UNIMP instructions which are part
961 :			of the calling convention.)
962 :			* ml-nlffi-lib was reorganized to make it more modular (in particular,
963 :			to make it easier to plug in new machine- and os-dependent parts).
964 :
965 :			There are some other fairly unrelated bug fixes and cleanups as well:
966 :
967 :			* I further hacked the .cm files for MLRISC tools (like MDLGen) so
968 :			that they properly share their libraries with existing SML/NJ libraries.
969 :			* I fixed a minor cosmetic bug in CM, supressing certain spurious
970 :			follow-up error messages.
971 :			* Updates to CM/CMB documentation.
972 :
973 :			TODO items:
974 :
975 :			* MLRISC should use a different register as its asmTemp on the Sparc.
976 :			(The current %o2 is a really bad choice because it is part of the
977 :			calling conventions, so things might interfere in unexpected ways.)
978 :
979 :			----------------------------------------------------------------------
980 :			Name: Matthias Blume
981 :	blume	839	Date: 2001/06/07
982 :			Tag: blume-20010607-calls
983 :			Description:
984 :
985 :			A number of internal changes related to C calls and calling conventions:
986 :
987 :			1. ML-Tree CALL statements now carry a "pops" field. It indicates the
988 :			number of bytes popped implicitly (by the callee). In most cases
989 :			this field is 0 but on x86/win32 it is some non-zero value. This
990 :			is information provided for the benefit of the "omit-frameptr" pass.
991 :			2. The CALL instruction on the x86 carries a similar "pops" field.
992 :			The instruction selection phase copies its value from the ML-Tree
993 :			CALL statement.
994 :			3. On all other architectures, the instruction selection phase checks
995 :			whether "pops=0" and complains if not.
996 :			4. The c-calls implementation for x86 now accepts two calling conventions:
997 :			"ccall" and "stdcall". When "ccall" is selected, the caller cleans
998 :			up after the call and pops is set to 0. For "stdcall", the caller
999 :			does nothing, leaving the cleanup to the callee; pops is set to
1000 :			the number of bytes that were pushed onto the stack.
1001 :			5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1002 :			distinguish between "ccall" and "stdcall".
1003 :			6. The UNIMP instruction has been added to the supported Sparc instruction
1004 :			set. (This is needed for implementing the official C calling convention
1005 :			on this architecture.)
1006 :			7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1007 :			work with the latest CM.
1008 :
1009 :			----------------------------------------------------------------------
1010 :			Name: Matthias Blume
1011 :	blume	838	Date: 2001/06/05 15:10:00 EDT
1012 :			Tag: blume-20010605-cm-index
1013 :			Description:
1014 :
1015 :			0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1016 :
1017 :			1. CM can now generate "index files". These are human-readable files
1018 :			that list on a per-.cm-file basis each toplevel symbol defined or
1019 :			imported. The location of the index file for
1020 :			<p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1021 :			To enable index-file generation, set CM.Control.generate_index to true
1022 :			or export an environment-symbol: export CM_GENERATE_INDEX=true.
1023 :
1024 :			The CM manual has been updated accordingly.
1025 :
1026 :			2. I made some slight modifications to the c-calls API in MLRISC.
1027 :
1028 :			a) There is now a callback to support saving/restoring of
1029 :			dedicated but caller-save registers around the actual call
1030 :			instruction.
1031 :			b) One can optionally specify a comment-annotation for the
1032 :			call instruction.
1033 :
1034 :			3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1035 :			(For example, the comment annotation shows the C prototype of
1036 :			the function being called.)
1037 :
1038 :			----------------------------------------------------------------------
1039 :			Name: Matthias Blume
1040 :	blume	837	Date: 2001/06/01 13:30:00 EDT
1041 :			Tag: blume-20010601-nlffi-cleanup
1042 :			Description:
1043 :
1044 :			This is mostly a cleanup of MLFFI stuff:
1045 :
1046 :			- some signature files have been put into a more exposed place
1047 :			- the ugly 'f type parameter is gone (simplifies types tremendously!)
1048 :			- ml-nlffigen changed accordingly
1049 :			- tutorial updated
1050 :
1051 :			Other changes:
1052 :
1053 :			- author's affiliation in CM manual(s) updated
1054 :			- some more recognized keywords added to Allen's sml.sty
1055 :
1056 :			----------------------------------------------------------------------
1057 :			Name: Matthias Blume
1058 :	blume	836	Date: 2001/05/25 15:30:00 EDT
1059 :			Tag: blume-20010525-iptr
1060 :			Description:
1061 :
1062 :			- put the official 110.33-README (as it appears on the ftp server) under
1063 :			CVS
1064 :			- fixed a small bug related to incomplete pointer types in
1065 :			ml-nlffigen
1066 :			- small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1067 :			(it does not need the 'f type parameter)
1068 :
1069 :			----------------------------------------------------------------------
1070 :			Name: Matthias Blume
1071 :	blume	834	Date: 2001/05/23 14:30:00 EDT
1072 :			Tag: Release_110_33
1073 :			Description:
1074 :
1075 :			New version number (110.33). New bootfiles.
1076 :
1077 :			----------------------------------------------------------------------
1078 :			Name: Matthias Blume
1079 :	blume	833	Date: 2001/05/22 18:06:00 EDT
1080 :			Tag: blume-20010522-targets
1081 :			Description:
1082 :
1083 :			Made install.sh use file config/targets.customized if it exists, falling
1084 :			back to config/targets if it doesn't. This way one can have a customized
1085 :			version of the targets file without touching the "real thing", thus
1086 :			eliminating the constant fear of accidentally checking something bogus
1087 :			back into the CVS repository... (File config/targets.customized must
1088 :			not be added to the repository!)
1089 :
1090 :			----------------------------------------------------------------------
1091 :			Name: Matthias Blume
1092 :	blume	832	Date: 2001/05/22 16:30:00 EDT
1093 :			Tag: blume-20010522-minitut
1094 :			Description:
1095 :
1096 :			1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1097 :			struct returns.
1098 :			2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt. This is some very
1099 :			incomplete, preliminary documentation for NLFFI.
1100 :
1101 :			----------------------------------------------------------------------
1102 :			Name: Matthias Blume
1103 :	blume	829	Date: 2001/05/14 11:30:00 EDT
1104 :			Tag: blume-20010514-script
1105 :			Description:
1106 :
1107 :			Some bugs in install script fixed.
1108 :
1109 :			In addition to that I also made a slight change to the NLFFI API:
1110 :			Functors generated by ml-nlffigen now take the dynamic library as a
1111 :			straight functor argument, not as a suspended one. (The original
1112 :			functor code used to force the suspension right away anyway, so there
1113 :			was nothing gained by this complication of the interface.)
1114 :
1115 :			----------------------------------------------------------------------
1116 :			Name: Matthias Blume
1117 :	blume	828	Date: 2001/05/11 14:35:00 EDT
1118 :			Tag: blume-20010511-ml-nlffi
1119 :			Description:
1120 :
1121 :			I finally took the plunge and added my new FFI code to the main
1122 :			repository. For x86-linux it is now ready for prime-time.
1123 :
1124 :			There are two new subdirectories of "src":
1125 :
1126 :			- ml-nlffi-lib:
1127 :			The utility library for programs using the FFI interface.
1128 :			Here is the implementation of $/c.cm and its associated low-level
1129 :			partners $/c-int.cm and $/memory.cm.
1130 :			- ml-nlffigen:
1131 :			A stand-alone program for generating ML glue code from C source
1132 :			code.
1133 :
1134 :			Building ml-nlffigen requires $/ckit-lib.cm.
1135 :
1136 :			The config/install.sh script has been updates to do the Right Thing
1137 :			(hopefully).
1138 :
1139 :			Notice that the source tree for the C-Kit will not be put under "src"
1140 :			but directly under the installation root directory. (This is the
1141 :			structure that currently exists on the CVS server when you check out
1142 :			module "sml".) Fortunately, config/install.sh knows about this oddity.
1143 :
1144 :			Bugs: No documentation yet.
1145 :
1146 :			----------------------------------------------------------------------
1147 :			Name: Matthias Blume
1148 :	blume	826	Date: 2001/05/09 16:35:00 EDT
1149 :			Tag: blume-20010509-cpscontract
1150 :			Description:
1151 :
1152 :			Fixed a bug in the accounting code in cpsopt/contract.sml. (The
1153 :			wrapper/unwrapper elimination did not decrement usage counts and some
1154 :			dead variables got overlooked by the dead-up logic.)
1155 :
1156 :			----------------------------------------------------------------------
1157 :	george	824	Name: Lal George
1158 :			Date: 2001/05/08 17:26:09 EDT
1159 :			Tag: george-20010508-omit-frameptr
1160 :			Description:
1161 :
1162 :			Changes to implement the omit-frame-pointer optimization to support
1163 :			raw C calls. For now, there is only support on the Intel x86, but
1164 :			other architectures will follow as more experience is gained with this.
1165 :
1166 :
1167 :			----------------------------------------------------------------------
1168 :	blume	818	Name: Matthias Blume
1169 :	blume	819	Date: 2001/05/07 14:40:00 EDT
1170 :			Tag: blume-20010507-proxies
1171 :			Description:
1172 :
1173 :			I made into "proxy libraries" all libraries that qualify for such a
1174 :			change. (A qualifying library is a library that has another library or
1175 :			groups as its sole member and repeats that member's export list
1176 :			verbatim. A proxy library avoids this repetition by omitting its export
1177 :			list, effectively inheriting the list that its (only) member exports.
1178 :			See the CM manual for more explanation.)
1179 :			The main effect is that explicit export lists for these libraries
1180 :			do not have to be kepts in sync, making maintenance a bit easier.
1181 :
1182 :			I also added copyright notices to many .cm-files.
1183 :
1184 :			Last but not least, I made a new set of bootfiles.
1185 :
1186 :			----------------------------------------------------------------------
1187 :			Name: Matthias Blume
1188 :	blume	818	Date: 2001/05/04 17:00:00 EDT
1189 :			Tag: blume-20010504-cm-lsplit
1190 :			Description:
1191 :
1192 :			0. John merged pending changes to $/smlnj-lib.cm
1193 :
1194 :			1. Allen's previous change accidentally backed out of one of Lal's
1195 :			earlier changes. I undid this mistake (re-introducing Lal's change).
1196 :
1197 :			2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1198 :			within the compiler where applicable. There is some code simplification
1199 :			because of that.
1200 :
1201 :			3. The "split" phase (in FLINT) is now part of the default list of phases.
1202 :			Compiler.Control.LambdaSplitting.* can be used to globally control the
1203 :			lambda-splitting (cross-module-inlining) engine. In addition to that,
1204 :			it can now also be controlled on a per-source basis: CM has been taught
1205 :			a new tool parameter applicable to ML source files.
1206 :
1207 :			- To turn lambda-splitting off completely:
1208 :			local open Compiler.Control.LambdaSplitting in
1209 :			val _ = set Off
1210 :			end
1211 :			- To make "no lambda-splitting" the global default (but allow per-source
1212 :			overriding); this is the initial setting:
1213 :			local open Compiler.Control.LambdaSplitting in
1214 :			val _ = set (Default NONE)
1215 :			end
1216 :			- To make "lambda-splitting with aggressiveness a" the global default
1217 :			(and allow per-source overriding):
1218 :			local open Compiler.Control.LambdaSplitting in
1219 :			val _ = set (Default (SOME a))
1220 :			end
1221 :
1222 :			- To turn lambda-splitting off for a given ML souce file (say: a.sml)
1223 :			write (in the respective .cm-file):
1224 :			a.sml (lambdasplitting:off)
1225 :			- To turn lambda-splitting for a.sml on with minimal aggressiveness:
1226 :			a.sml (lambdasplitting:on)
1227 :			- To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1228 :			<a> is a decimal non-negative integer):
1229 :			a.sml (lambdasplitting:<a>)
1230 :			- To turn lambda-splitting for a.sml on with maximal aggressiveness:
1231 :			a.sml (lambdasplitting:infinity)
1232 :			- To use the global default for a.sml:
1233 :			a.sml (lambdasplitting:default)
1234 :			or simply
1235 :			a.sml
1236 :
1237 :			----------------------------------------------------------------------
1238 :	leunga	815	Name: Allen Leung
1239 :			Date: 2001/05/04 01:57:00 EDT
1240 :			Tag: leunga-20010504-sync
1241 :			Description:
1242 :	leunga	788
1243 :	leunga	815	MLRISC features.
1244 :
1245 :			1. Fix to CMPXCHG instructions.
1246 :			2. Changed RA interface to allow annotations in callbacks.
1247 :			3. Added a new method to the stream interface to allow annotations updates.
1248 :
1249 :	george	749	----------------------------------------------------------------------
1250 :	blume	812	Name: Matthias Blume
1251 :	blume	814	Date: 2001/05/01 11:45:00 EDT
1252 :			Tag: blume-20010501-pcedittmp
1253 :			Description:
1254 :
1255 :			Changed install.sh to use the current working directory instead of
1256 :			/usr/tmp for a temporary file (pcedittmp). The previous choice
1257 :			of /usr/tmp caused trouble with MacOS X because of file premission
1258 :			problems.
1259 :
1260 :			----------------------------------------------------------------------
1261 :			Name: Matthias Blume
1262 :	blume	812	Date: 2001/04/20 11:10:00 EDT
1263 :			Tag: blume-20010420-inMLflag
1264 :			Description:
1265 :
1266 :			- added vp_limitPtrMask to vproc-state.h
1267 :			(for use by the raw-C-calls mechanism to implement proper interrupt
1268 :			handling)
1269 :			- made the ML compiler aware of various data-structure offsets so it
1270 :			can generate code for accessing the vp_inML flag and vp_limitPtrMask
1271 :			- tweaked mlriscGen.sml to have it emit interrupt-handling code for
1272 :			raw C-calls
1273 :
1274 :			----------------------------------------------------------------------
1275 :	george	810	Name: Lal George
1276 :			Date: 2001/04/20 09:15:28 EDT
1277 :			Tag: george-20010420-macosX
1278 :			Description:
1279 :
1280 :			- Changes to port to Mac OS X; Darwin.
1281 :
1282 :			- In the process I found that sqrt was broken on the PPC, because the
1283 :			fsqrt instruction is not implemented.
1284 :
1285 :			----------------------------------------------------------------------
1286 :	blume	799	Name: Matthias Blume
1287 :	blume	808	Date: 2001/04/18 12:45:00 EDT
1288 :			Tag: blume-20010418-ccalls
1289 :			Description:
1290 :
1291 :			- fixed two off-by-4 errors in the x86-specific c-calls implementation
1292 :			(this bug prevented structure arguments containing pointers from being
1293 :			passed correctly)
1294 :			- changed the raw-C-call code in mlriscGen.sml in such a way that
1295 :			structure arguments are represented as a pointer to the beginning
1296 :			of the structure (instead of having a series of synthesized arguments,
1297 :			one for each structure member)
1298 :
1299 :			- made makeml script's verbosity level configurable via environment
1300 :			variable (MAKEML_VERBOSITY)
1301 :
1302 :	blume	813	- eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1303 :	blume	808	in rawmem-x86.sml; we are now using the real thing
1304 :
1305 :			----------------------------------------------------------------------
1306 :			Name: Matthias Blume
1307 :	blume	806	Date: 2001/03/22 16:25:00 EST
1308 :			Tag: blume-20010322-bootfiles
1309 :			Description:
1310 :
1311 :			Created a new set of bootfiles (for your automatic installation convenience).
1312 :
1313 :			----------------------------------------------------------------------
1314 :			Name: Matthias Blume
1315 :	blume	805	Date: 2001/03/22 15:10:00 EST
1316 :			Tag: blume-20010322-rawmem-parcm
1317 :			Description:
1318 :
1319 :			1. All "raw memory access" primitives for the new FFI are implemented now
1320 :			(at least on the x86).
1321 :			2. Some further cleanup of CM's parallel make mechanism.
1322 :
1323 :			----------------------------------------------------------------------
1324 :			Name: Matthias Blume
1325 :	blume	801	Date: 2001/03/19 17:53:00 EST
1326 :			Tag: blume-20010319-parallel
1327 :			Description:
1328 :
1329 :			Parallel make (using compile servers) now works again.
1330 :
1331 :			To this end, CM.stabilize and CMB.make have been modified to work in
1332 :			two passes when compile servers are attached:
1333 :			1. Compile everything, do not perform stabilization; this pass
1334 :			uses compile servers
1335 :			2. Stabilize everything; this pass does not use compile servers
1336 :			If there are no compile servers, the two passes are combined into one
1337 :			(as before). Splitting the passes increases the inherent parallelism
1338 :			in the dependency graph because the entire graph including all
1339 :			libraries is available at the same time. This, in turn, improves
1340 :			server utilization. The downside is that the master process will
1341 :			have to do some extra work after compilation is done (because for
1342 :			technical reasons it must re-read all the binfiles during stabilization).
1343 :
1344 :			----------------------------------------------------------------------
1345 :			Name: Matthias Blume
1346 :	blume	800	Date: 2001/03/16 12:22:00 EST
1347 :			Tag: blume-20010316-bootfiles
1348 :			Description:
1349 :
1350 :			Created a new set of bootfiles (for your automatic installation convenience).
1351 :
1352 :			----------------------------------------------------------------------
1353 :			Name: Matthias Blume
1354 :	blume	799	Date: 2001/03/16 11:00:00 EST
1355 :			Tag: blume-20010316-MLTREE-fixup
1356 :			Description:
1357 :
1358 :			This is a minor fixup for an (untagged) earlier commit by Allen.
1359 :			(A file was missing).
1360 :
1361 :			----------------------------------------------------------------------
1362 :	leunga	788	Name: Allen Leung
1363 :	leunga	796	Date: Mon Mar 5 18:54:57 EST 2001
1364 :			Tag: leunga-20010305-cut-support
1365 :
1366 :			1. New support for alternative control-flow in MLTREE.
1367 :			Currently we support
1368 :
1369 :			FLOW_TO(CALL ...., [k1,...,kn])
1370 :
1371 :			This is needed for 'cuts to' in C-- and try/handle-like constructs
1372 :			in Moby
1373 :
1374 :			New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1375 :
1376 :			2. Register Allocator
1377 :
1378 :			Changes in interface [from Fermin, John]
1379 :
1380 :			3. Alpha 8-bit SLL support [Fermin]
1381 :
1382 :			4. All architectures
1383 :
1384 :			A new module (ClusterExpandCopies) for expanding parallel copies.
1385 :
1386 :			----------------------------------------------------------------------
1387 :			Name: Allen Leung
1388 :	leunga	788	Date: 2001/02/27 23:07:00 EST
1389 :			Tag: leunga-20010227-minor-stuff
1390 :
1391 :			1. Alpha bug fix for CMOVNE
1392 :			2. Handle mltree COND(..,FCMP ...,...)
1393 :			3. Bug fix in simplifier
1394 :
1395 :			----------------------------------------------------------------------
1396 :	blume	777	Name: Matthias Blume
1397 :	blume	781	Date: 2001/01/30 17:50:00 EST
1398 :			Tag: blume-20010130-sync
1399 :			Description:
1400 :
1401 :			This is just a minor update to sync my devel branch with the main brach.
1402 :			The only visible change is the addition of some README files.
1403 :
1404 :			----------------------------------------------------------------------
1405 :			Name: Matthias Blume
1406 :	blume	778	Date: 2001/01/12 23:30:00 JST
1407 :			Tag: blume-20010112-bootfiles
1408 :			Description:
1409 :
1410 :			Made a new set of bootfiles that goes with the current state of the
1411 :			repository.
1412 :
1413 :			----------------------------------------------------------------------
1414 :			Name: Matthias Blume
1415 :	blume	777	Date: 2001/01/12 21:20:00 JST
1416 :			Tag: blume-20010112-sync
1417 :			Description:
1418 :
1419 :			I am just flushing out some minor changes that had accumulated in
1420 :			my private branch in order to sync with the main tree. (This is
1421 :			mainly because I had CVS trouble when trying to merge _into_ my
1422 :			private branch.)
1423 :
1424 :			Most people should be completely unaffected by this.
1425 :
1426 :			----------------------------------------------------------------------
1427 :	leunga	775	Name: Allen Leung
1428 :			Date: Thu Jan 11 21:03:00 EST 2001
1429 :			Tag: leunga-20010111-labexp=mltree
1430 :			Description:
1431 :
1432 :			1. Removed the type LabelExp and replace it by MLTree.
1433 :			2. Rewritten mltree-simplify with the pattern matcher tool.
1434 :			3. There were some bugs in alpha code generator which would break
1435 :			64-bit code generation.
1436 :			4. Redo the tools to generate code with the
1437 :			5. The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1438 :			are now generated by perl scripts.
1439 :
1440 :			----------------------------------------------------------------------
1441 :	blume	771	Name: Matthias Blume
1442 :	blume	774	Date: 2001/01/10 21:55:00 JST
1443 :			Tag: blume-20010110-rcc
1444 :			Description:
1445 :
1446 :			The RCC stuff now seems to work (but only on the x86).
1447 :			This required hacking of the c-calls interface (and -implementation) in
1448 :			MLRISC.
1449 :
1450 :			Normal compiler users should be unaffected.
1451 :
1452 :			----------------------------------------------------------------------
1453 :			Name: Matthias Blume
1454 :	blume	773	Date: 2001/01/09 01:20:00 JST
1455 :			Tag: blume-20010109-rcc
1456 :			Description:
1457 :
1458 :			This is a fairly big patch, flushing out a large number of pending
1459 :			changes that I made to my development copy over the last couple of days.
1460 :
1461 :			Of practical relevance at this moment is a workaround for a pickling
1462 :			bug that Allen ran into the other day. The cause of the bug itself is
1463 :			still unknown and it might be hard to fix it properly, but the
1464 :			workaround has some merits of its own (namely somewhat reducing pickling
1465 :			overhead for certain libraries). Therefore, I think this solution should
1466 :			be satisfactory at this time.
1467 :
1468 :			The rest of the changes (i.e., the vast majority) has to do with my
1469 :			ongoing efforts of providing direct support for C function calls from
1470 :			ML. At the moment there is a new primop "RAW_CCALL", typing magic
1471 :			in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1472 :			case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1473 :			translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1474 :			handle RCC.
1475 :
1476 :			The last part (the changes to mlriscGen.sml) are still known to be
1477 :			wrong on the x86 and not implemented on all other architectures. But
1478 :			the infrastructure is in place. I had to change a few functor
1479 :			signatures in the backend to be able to route the CCalls interface
1480 :			from MLRISC there, and I had to specialize the mltree type (on the
1481 :			x86) to include the necessary extensions. (The extensions themselves
1482 :			were already there and redy to go in MLRISC/x86).
1483 :
1484 :			Everything should be very happy as soon as someone helps me with
1485 :			mlriscGen.sml...
1486 :
1487 :			In any case, nothing of this should matter to anyone as long as the
1488 :			new primop is not being used (which is going to be the case unless you
1489 :			find it where I hid it :). The rest of the compiler is completely
1490 :			unaffected.
1491 :
1492 :			----------------------------------------------------------------------
1493 :			Name: Matthias Blume
1494 :	blume	772	Date: 2001/01/05 00:30:00 JST
1495 :			Tag: blume-20010105-primops
1496 :			Description:
1497 :
1498 :			Added some experimental support for work that I am doing right now.
1499 :			These changes mostly concern added primops, but there is also a new
1500 :			experimental C library in the runtime system (but currently not enabled
1501 :			anywhere except on Linux/X86).
1502 :
1503 :			In the course of adding primops (and playing with them), I discovered that
1504 :			Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1505 :			broken. (Zhong was very right he labeled this stuff as "major gross hack".)
1506 :			To recover, I made type information in INL_PRIM mandatory and changed
1507 :			prim.sml as well as built-in.sml accordingly. The InLine structure now
1508 :			has complete, correct type information (i.e., no bottom types).
1509 :
1510 :			Since all these changes mean that we need new binfiles, I also bumped the
1511 :			version number to 110.32.1.
1512 :
1513 :			----------------------------------------------------------------------
1514 :			Name: Matthias Blume
1515 :	blume	771	Date: 2000/12/30 22:10:00 JST
1516 :			Tag: blume-20001230-various
1517 :			Description:
1518 :
1519 :			Added proxy libraries for MLRISC and let MLRISC libraries refer
1520 :			to each other using path anchors. (See CM manual for explanation.)
1521 :
1522 :			Updated CM documentation.
1523 :
1524 :			Fixed some bugs in CM.
1525 :
1526 :			Implemented "proxy" libraries (= syntactic sugar for CM).
1527 :
1528 :			Added "-quiet" option to makeml and changed runtime system accordingly.
1529 :
1530 :			Added cleanup handler for exportML to reset timers and compiler stats.
1531 :
1532 :			----------------------------------------------------------------------
1533 :	george	761	Name: Lal George
1534 :			Date: 2000/12/22 22:22:58 EST 2000
1535 :			Tag: Release_110_32
1536 :			Description:
1537 :
1538 :			Infinite precision used throughout MLRISC.
1539 :			see MLRISC/mltree/machine-int.sig
1540 :
1541 :			----------------------------------------------------------------------
1542 :	blume	756	Name: Matthias Blume
1543 :	blume	760	Date: 2000/12/22 23:16:00 JST
1544 :			Tag: blume-20001222-warn
1545 :			Description:
1546 :	blume	759
1547 :	blume	760	Corrected wording and formatting of some CM warning message which I
1548 :			broke in my previous patch.
1549 :	blume	759
1550 :			----------------------------------------------------------------------
1551 :			Name: Matthias Blume
1552 :	blume	763	Date: 2000/12/22 21:20:00 JST
1553 :			Tag: blume-20001222-anchorenv
1554 :			Description:
1555 :
1556 :			Fixed CM's handling of anchor environments in connection with CMB.make.
1557 :
1558 :			----------------------------------------------------------------------
1559 :			Name: Matthias Blume
1560 :	blume	758	Date: 2000/12/22 13:15:00 JST
1561 :			Tag: blume-20001222-cleanup
1562 :			Description:
1563 :
1564 :			Removed src/cm/ffi which does not (and did not) belong here.
1565 :
1566 :			----------------------------------------------------------------------
1567 :			Name: Matthias Blume
1568 :	blume	757	Date: 2000/12/21 23:55:00 JST
1569 :			Tag: blume-20001221-exn
1570 :			Description:
1571 :
1572 :			Probably most important: CM no longer silently swallows all exceptions
1573 :			in the compiler.
1574 :			Plus: some other minor CM changes. For example, CM now reports some
1575 :			sizes for generated binfiles (code, data, envpickle, lambdapickle).
1576 :
1577 :			----------------------------------------------------------------------
1578 :			Name: Matthias Blume
1579 :	blume	756	Date: 2000/12/15 00:01:05 JST
1580 :			Tag: blume-20001215-dirtool
1581 :			Description:
1582 :
1583 :			- "dir" tool added.
1584 :			- improvements and cleanup to Tools structure
1585 :			- documentation updates
1586 :
1587 :			----------------------------------------------------------------------
1588 :	leunga	752	Name: Allen Leung
1589 :	leunga	755	Date: Thu Dec 14 03:45:24 EST 2000
1590 :			Description:
1591 :			Tag: leunga-20001214-int-inf
1592 :			Description:
1593 :
1594 :			In IntInf, added these standard functions, which are missing from our
1595 :			implementation:
1596 :
1597 :			andb : int * int -> int
1598 :			xorb : int * int -> int
1599 :			orb : int * int -> int
1600 :			notb : int -> int
1601 :			<< : int * word -> int
1602 :			~>> : int * word -> int
1603 :
1604 :			Not tested, I hope they are correct.
1605 :
1606 :			----------------------------------------------------------------------
1607 :			Name: Allen Leung
1608 :	leunga	752	Date: Fri Dec 8 19:23:26 EST 2000
1609 :			Description:
1610 :			Tag: leunga-20001208-nowhere
1611 :			Description:
1612 :
1613 :			Slight improvements to the 'nowhere' tool to handle OR-patterns,
1614 :			to generate better error messages etc. Plus a brief manual.
1615 :
1616 :			----------------------------------------------------------------------
1617 :	george	749	Name: Lal George
1618 :			Date: 2000/12/08 09:54:02 EST 2000
1619 :			Tag: Release_110_31
1620 :			Description:
1621 :	george	705
1622 :	george	749	- Version 110.31
1623 :	leunga	591	----------------------------------------------------------------------
1624 :	leunga	744	Name: Allen Leung
1625 :			Date: Thu Dec 7 22:01:04 EST 2000
1626 :			Tag: leunga-20001207-cell-monster-hack
1627 :			Description:
1628 :
1629 :			Major MLRISC internal changes. Affect all clients.
1630 :			Summary:
1631 :
1632 :			1. Type CELLS.cell = int is now replaced by a datatype.
1633 :			As a result, the old regmap is now gone. Almost all interfaces
1634 :			in MLRISC change as a consequence.
1635 :
1636 :			2. A new brand version of machine description tool (v3.0) that generates
1637 :			modules expecting the new interface. The old version is removed.
1638 :
1639 :			3. The RA interface has been further abstracted into two new functors.
1640 :			RISC_RA and X86RA. These functors have much simpler interfaces.
1641 :			[See also directory MLRISC/demo.]
1642 :
1643 :			4. Some other new source->source code generation tools are available:
1644 :
1645 :			a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1646 :			b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1647 :			I use this tool to generate the peephole optimizers---with the new
1648 :			cell type changes, peephole rules are becoming difficult to write
1649 :			without conditional pattern matching.
1650 :
1651 :			5. More Intmap -> IntHashTable change. Previous changes by Matthias didn't
1652 :			cover the entire MLRISC source tree so many things broke.
1653 :
1654 :			6. CM files have been moved to the subdirectory MLRISC/cm.
1655 :			They are moved because there are a lot of them and they clutter up the
1656 :			root dir.
1657 :
1658 :			7. More detailed documentation to come...
1659 :
1660 :			NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1661 :			a makeml -rebuild first. This is because of other other
1662 :			changes that Matthias has made (see below).
1663 :
1664 :
1665 :			----------------------------------------------------------------------
1666 :	blume	733	Name: Matthias Blume
1667 :	blume	742	Date: 2000/11/30 23:12:00 JST
1668 :			Tag: blume-20001130-filereorg
1669 :			Description:
1670 :
1671 :			Some manual updates and some file reorganizations in CM.
1672 :
1673 :			----------------------------------------------------------------------
1674 :			Name: Matthias Blume
1675 :	blume	737	Date: 2000/11/24 17:45:00 JST
1676 :			Tag: blume-20001124-link
1677 :			Description:
1678 :
1679 :			Drastically improved link traversal code for the case that the dynamic
1680 :			value was already loaded at bootstrap time. As a result, CM and CMB
1681 :			now both load blazingly fast -- even on a very slow machine. Also,
1682 :			memory consumption has been further reduced by this.
1683 :
1684 :			Warning: The format of the PIDMAP file has changed. THerefore, to
1685 :			bootstrap you have to do this:
1686 :
1687 :			1. Run CMB.make
1688 :			2. Make a symbolic link for the boot directory:
1689 :			ln -s sml.boot.ARCH-OS xxx
1690 :			3. "Rebuild" the boot directory:
1691 :			./makeml -boot xxx -rebuild sml ; rm xxx
1692 :			4. Boot normally:
1693 :			./makeml
1694 :
1695 :			----------------------------------------------------------------------
1696 :			Name: Matthias Blume
1697 :	blume	735	Date: 2000/11/21 21:20:00 JST
1698 :			Tag: blume-20001121-tools
1699 :			Description:
1700 :
1701 :			Continued hacking on autoloading problem -- with success this time.
1702 :			Also changed tool-plugin mechanism. See new CM manual.
1703 :
1704 :			----------------------------------------------------------------------
1705 :			Name: Matthias Blume
1706 :	blume	734	Date: 2000/11/19 14:30:00 JST
1707 :			Tag: blume-20001119-autoload
1708 :			Description:
1709 :
1710 :			Some hacking to make autoloading faster. Success for CMB, no success
1711 :			so far for CM. There is a reduced structure CM' that autoloads faster.
1712 :			(This is a temporary, non-documented hack to be eliminated again when
1713 :			the general problem is solved.)
1714 :
1715 :			----------------------------------------------------------------------
1716 :			Name: Matthias Blume
1717 :	blume	733	Date: 2000/11/17 14:10:00 JST
1718 :			Tag: blume-20001117-pickle-lib
1719 :			Description:
1720 :
1721 :			1. Eliminated comp-lib.cm
1722 :			2. Made pickle-lib.cm
1723 :			3. Eliminated all uses of intset.sml (from comp-lib.cm)
1724 :			4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1725 :			equivalent constructs from smlnj-lib.cm (INtHashTable).
1726 :			5. Point 4. also goes for those uses of intmap.* in MLRISC.
1727 :			Duplicated intmap modules thrown out.
1728 :			6. Hunted down all duplicated SCC code and replaced it with
1729 :			equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1730 :			7. Rewrote Feedback module.
1731 :			8. Moved sortedlist.sml into viscomp-lib.cm. Eventually it
1732 :			should be thrown out and equivalent modules from smlnj-lib.cm
1733 :			should be used (IntRedBlackSet, IntListSet, ...).
1734 :
1735 :			Confirmed that compiler compiles to fixpoint.
1736 :
1737 :			----------------------------------------------------------------------
1738 :	leunga	731	Name: Allen Leung
1739 :			Date: 2000/11/10 18:00:00
1740 :			Tag: leunga-20001110-new-x86-fp
1741 :
1742 :			A new x86 floating point code generator has been added.
1743 :			By default this is turned off. To turn this on, do:
1744 :
1745 :			CM.autoload "$smlnj/compiler.cm";
1746 :			Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
1747 :
1748 :			Changes:
1749 :
1750 :			1. Changed FTAN to FPTAN so that the assembly output is correct.
1751 :			2. Changed the extension callback for FTANGENT to generate:
1752 :
1753 :			fptan
1754 :			fstp %st(0)
1755 :			instead of
1756 :			fptan
1757 :			fstpl ftempmem
1758 :
1759 :			3. Numerous assembly fixes for x86.
1760 :
1761 :			5. Cleaned up the machine code output module x86/x86MC.sml and added
1762 :			support for a whole bunch of instructions and addressing modes:
1763 :
1764 :			fadd/fsub/fsubr/fmul/fdiv/fdivr %st, %st(n)
1765 :			faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp %st, %st(n)
1766 :			fadd/fsub/fsubr/fmul/fdiv/fdivr %st(n), %st
1767 :			fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
1768 :			fxch %st(n)
1769 :			fld %st(n)
1770 :			fst %st(n)
1771 :			fst mem
1772 :			fstp %st(n)
1773 :			fucom %st(n)
1774 :			fucomp %st(n)
1775 :
1776 :			All these are now generated when the fast fp mode is turned on.
1777 :
1778 :			6. Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
1779 :
1780 :			----------------------------------------------------------------------
1781 :	blume	729	Name: Matthias Blume
1782 :			Date: 2000/11/09 11:20:00 JST
1783 :			Tag: blume-20001109-scc
1784 :			Description:
1785 :
1786 :			Eliminated some code duplication:
1787 :
1788 :			1. Added "where" clause to GraphSCCFn in SML/NJ Library.
1789 :			(Otherwise the functor is useless.)
1790 :			2. Used GraphSCCFn where SCCUtilFun was used previously.
1791 :			3. Got rid of SCCUtilFun (in comp-lib.cm).
1792 :
1793 :			----------------------------------------------------------------------
1794 :	george	721	Name: Lal George
1795 :			Date: 2000/11/06 09:02:21 EST 2000
1796 :			Tag: Release_110_30
1797 :			Description:
1798 :
1799 :			- Version 110.30
1800 :			----------------------------------------------------------------------
1801 :	blume	715	Name: Matthias Blume
1802 :	blume	716	Date: 2000/11/04 14:45:00
1803 :			Tag: blume-20001104-mlbuild
1804 :			Description:
1805 :
1806 :			- Made ml-build faster on startup.
1807 :			- Documentation fixes.
1808 :
1809 :			----------------------------------------------------------------------
1810 :			Name: Matthias Blume
1811 :	blume	715	Date: 2000/11/02 17:00:00 JST
1812 :			Tag: blume-20001102-condcomp
1813 :			Description:
1814 :
1815 :			- Small tweaks to pickler -- new BOOTFILES!
1816 :			- Version bumped to 110.29.2.
1817 :			- Added conditional compilation facility to init.cmi (see comment there).
1818 :			----------------------------------------------------------------------
1819 :	leunga	713	Name: Allen Leung
1820 :			Date: 2000/10/23 19:31:00
1821 :			Tag: leunga-20001023-demo-ra
1822 :
1823 :			1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
1824 :			2. Test programs for the graph library updated
1825 :			3. Some new MLRISC demo programs added
1826 :
1827 :			----------------------------------------------------------------------
1828 :	blume	710	Name: Matthias Blume
1829 :	blume	711	Date: 2000/08/31 22:15:00 JST
1830 :			Tag: blume-20001017-errmsg
1831 :			Description:
1832 :
1833 :			More error message grief: Where there used to be no messages, there
1834 :			now were some that had bogus error regions. Fixed.
1835 :
1836 :			----------------------------------------------------------------------
1837 :			Name: Matthias Blume
1838 :	blume	710	Date: 2000/08/31 17:30:00 JST
1839 :			Tag: blume-20001017-v110p29p1
1840 :			Description:
1841 :
1842 :			I made a version 110.29.1 with new bootfiles.
1843 :
1844 :			Changes: Modified pickler/unpickler for faster and leaner unpickling.
1845 :			CM documentation changes and a small bugfix in CM's error reporting.
1846 :
1847 :			----------------------------------------------------------------------
1848 :	george	705	Name: Lal George
1849 :			Date: 2000/09/27 14:42:35 EDT
1850 :			Tag: george-20000927-nodestatus
1851 :			Description:
1852 :
1853 :			Changed the type of the nodestatus, so that:
1854 :
1855 :			SPILLED(~1) is now SPILLED
1856 :			SPILLED(m) where m>=0 is now MEMREG(m)
1857 :			SPILLED(s) where s<~1 is now SPILL_LOC(~s)
1858 :
1859 :			----------------------------------------------------------------------
1860 :	blume	697	Name: Matthias Blume
1861 :	blume	703	Date: 2000/09/07 14:45:00 JST
1862 :			Tag: blume-20000907-cmerrmsg
1863 :			Description:
1864 :
1865 :			Small tweak to CM to avoid getting ML syntax error messages twice.
1866 :
1867 :			----------------------------------------------------------------------
1868 :			Name: Matthias Blume
1869 :	blume	701	Date: 2000/08/31 18:00:00 JST
1870 :			Tag: blume-20000831-cvsbootfiles
1871 :			Description:
1872 :
1873 :			New URL for boot files (because the 110.29 files on the BL server do
1874 :			now work correctly with my updated install scripts for yacc and lex).
1875 :
1876 :			----------------------------------------------------------------------
1877 :			Name: Matthias Blume
1878 :	blume	697	Date: 2000/08/08 12:33:00 JST
1879 :			Tag: blume-20000808-manual
1880 :			Description:
1881 :
1882 :			Tiny update to CM manual.
1883 :
1884 :			----------------------------------------------------------------------
1885 :	leunga	695	Name: Allen Leung
1886 :			Date: 2000/08/7 19:31:00
1887 :			Tag: leunga-20000807-a-whole-bunch-of-stuff
1888 :
1889 :			Moby, C--, SSA, x86, machine descriptions etc. Should only affect C--
1890 :			and Mobdy.
1891 :
1892 :			1. x86
1893 :
1894 :			a. Fixes to peephole module by John and Dan.
1895 :			b. Assembly fix to SETcc by Allen.
1896 :			c. Fix to c-call by John.
1897 :			d. Fix to spilling by John. (This one deals with the missing FSTPT case)
1898 :			e. Instruction selection optimization to SETcc as suggested by John.
1899 :
1900 :			For example,
1901 :
1902 :			MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
1903 :
1904 :			should generate:
1905 :
1906 :			MOVL a, x
1907 :			SUBL b, x
1908 :			SHRL 31, x
1909 :
1910 :			2. IR stuff
1911 :
1912 :			A bunch of new DJ-graph related algorithms added. These
1913 :			speed up SSA construction.
1914 :
1915 :			3. SSA + Scheduling
1916 :
1917 :			Added code for SSA and scheduling to the repository
1918 :
1919 :			----------------------------------------------------------------------
1920 :	george	694	Name: Lal George
1921 :			Date: 2000/07/27 11:53:14 EDT
1922 :
1923 :			Tag: lal-20000727-linux-ppc
1924 :			Description:
1925 :
1926 :			Made changes to support Linux PPC.
1927 :			p.s. I have confirmation that the 110.29 boot files work fine.
1928 :
1929 :			----------------------------------------------------------------------
1930 :	blume	684	Name: Matthias Blume
1931 :	blume	692	Date: 2000/07/27 17:40:00 JST
1932 :			Tag: blume-20000727-scripts
1933 :			Description:
1934 :
1935 :			!!!! WARNING !!!!
1936 :			You must recompile the runtime system!
1937 :			!!!! WARNING !!!!
1938 :
1939 :			This is basically another round of script-enhancements:
1940 :
1941 :			1. sml, ml-build, and ml-makedepend accept options -D and -U to define
1942 :			and undefine CM preprocessor symbols.
1943 :
1944 :			2. ml-build avoids generating a new heap image if it finds that the
1945 :			existing one is still ok. (The condition is that no ML file had to
1946 :			be recompiled and all ML files are found to be older that the heap
1947 :			file.)
1948 :
1949 :			To make this work smoothly, I also hacked the runtime system as
1950 :			well as SMLofNJ.SysInfo to get access to the heap image suffix
1951 :			(.sparc-solaris, ...) that is currently being used.
1952 :
1953 :			Moreover, the signature of CM.mk_standalone has changed. See the
1954 :			CM manual.
1955 :
1956 :			3. ml-makedepend accepts additional options -n, -a, and -o. (See the
1957 :			CM manual for details.)
1958 :
1959 :			4. More CM manual updates:
1960 :			- all of the above has been documented.
1961 :			- there is now a section describing the (CM-related) command line
1962 :			arguments that are accepted by the "sml" command
1963 :
1964 :			----------------------------------------------------------------------
1965 :			Name: Matthias Blume
1966 :	blume	691	Date: 2000/07/25 16:20:00 JST
1967 :			Tag: blume-20000725-makedepend
1968 :			Description:
1969 :
1970 :			Added a script called ml-makedepend. This can be used in makefiles
1971 :			for Unix' make in a way very similar to the "makedepend" command for
1972 :			C.
1973 :
1974 :			The script internally uses function CM.sources.
1975 :
1976 :			Synopsis:
1977 :
1978 :			ml-makedepend [-f makefile] cmfile targetname
1979 :
1980 :			The default for the makefile is "makefile" (or "Makefile" should
1981 :			"makefile" not exist).
1982 :
1983 :			ml-makedepend adds a cmfile/targetname-specific section to this
1984 :			makefile (after removing the previous version of this section). The
1985 :			section contains a single dependency specification with targetname on
1986 :			the LHS (targetname is an arbitrary name), and a list of files derived
1987 :			from the cmfile on the RHS. Some of the files on the RHS are
1988 :			ARCH/OPSYS-specific. Therefore, ml-makedepend inserts references to
1989 :			"make" variables $(ARCH) and $(OPSYS) in place of the corresponding
1990 :			path names. The makefile writer is responsible for making sure that
1991 :			these variables have correct at the time "make" is invoked.
1992 :
1993 :			----------------------------------------------------------------------
1994 :			Name: Matthias Blume
1995 :	blume	690	Date: 2000/07/22 23:30:00 JST
1996 :			Tag: blume-20000722-urlupdate
1997 :			Description:
1998 :
1999 :			Changed BOOT and config/srcarchiveurl to point to BL server:
2000 :
2001 :			ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2002 :
2003 :			----------------------------------------------------------------------
2004 :			Name: Matthias Blume
2005 :	blume	686	Date: 2000/07/18 18:00:00 JST
2006 :			Tag: blume-20000718-Version_110_29
2007 :			Description:
2008 :
2009 :			1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2010 :
2011 :			2. Updated config/version to 110.29
2012 :
2013 :			3. Updated config/srcarchiveurl
2014 :
2015 :			3. New boot files!
2016 :			ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2017 :
2018 :			----------------------------------------------------------------------
2019 :			Name: Matthias Blume
2020 :	blume	684	Date: 2000/07/11 13:58:00 JST
2021 :			Tag: blume-20000711-doctypo
2022 :			Description:
2023 :
2024 :			Fixed a few typos in CM manual.
2025 :
2026 :			----------------------------------------------------------------------
2027 :	leunga	683	Name: Allen Leung
2028 :			Date: 2000/06/15 00:38:00
2029 :			Tag: leunga-20000704-sparc-x86
2030 :
2031 :			1. x86 peephole improvement sp += k; sp -= k => nop [from John]
2032 :			2. fix to x86 RET bug [found by Dan Grossman]
2033 :			3. sparc assembly bug fix for ticc instructions [found by Fermin]
2034 :
2035 :			Affects c-- and moby only
2036 :
2037 :			----------------------------------------------------------------------
2038 :	blume	680	Name: Matthias Blume
2039 :	blume	682	Date: 2000/07/04 15:26:00
2040 :			Tag: blume-20000704-trigger
2041 :			Description:
2042 :
2043 :			1. Improvements to CM manual.
2044 :			2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2045 :			of getting a back-trace. The function, when called, raises an
2046 :			internal exception which explicitly carries the full back-trace history,
2047 :			so it is unaffected by any intervening handle-raise pairs ("trivial"
2048 :			or not). The interactive loop will print that history once it arrives
2049 :			at top level.
2050 :			Short of having all exceptions implicitly carry the full history, the
2051 :			recommended way of using this facility is:
2052 :			- compile your program with instrumentation "on"
2053 :			- run it, when it raises an exception, look at the history
2054 :			- if the history is "cut off" because of some handler, go and modify
2055 :			your program so that it explicitly calls BTrace.trigger
2056 :			- recompile (still instrumented), and rerun; look at the full history
2057 :
2058 :			----------------------------------------------------------------------
2059 :			Name: Matthias Blume
2060 :			Date: 2000/07/03 15:36:00 JST
2061 :	blume	680	Tag: blume-20000702-manual
2062 :			Description:
2063 :
2064 :			Small corrections and updates to CM manual.
2065 :
2066 :			----------------------------------------------------------------------
2067 :	blume	682	Name: Matthias Blume
2068 :	blume	679	Date: 2000/06/29 16:04:00 JST
2069 :			Tag: blume-20000629-yacctool
2070 :			Description:
2071 :
2072 :			Changes:
2073 :
2074 :			1. Class "mlyacc" now takes separate arguments to pass options to
2075 :			generated .sml- and .sig-files independently.
2076 :			2. Corresponding CM manual updates.
2077 :			3. BTrace module now also reports call sites. (However, for loop clusters
2078 :			it only shows from where the cluster was entered.) There are associated
2079 :			modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2080 :
2081 :			----------------------------------------------------------------------
2082 :	blume	675	Name: Matthias Blume
2083 :	blume	678	Date: 2000/06/27 16:51:00 JST
2084 :			Tag: blume-20000627-noweb
2085 :			Description:
2086 :
2087 :			Changes:
2088 :
2089 :			1. Implemented "subdir" and "witness" options for noweb tool.
2090 :			This caused some slight internal changes in CM's tool implementation.
2091 :			2. Fixed bug in "tool plugin" mechanism. This is essentially cleaning
2092 :			some remaining issues from earlier path anchor changes.
2093 :			3. Updated CM manual accordingly.
2094 :
2095 :			4. Changed implementation of back-tracing so that I now consider it
2096 :			ready for prime-time.
2097 :
2098 :			In particular, you don't have to explicitly trigger the back-trace
2099 :			anymore. Instead, if you are running BTrace-instrumented code and
2100 :			there is an uncaught exception (regardless of whether or not it was
2101 :			raised in instrumented code), the top-level evalloop will print
2102 :			the back-trace.
2103 :
2104 :			Features:
2105 :
2106 :			- Instrumented and uninstrumented code work together seemlessly.
2107 :			(Of course, uninstrumented code is never mentioned in actual
2108 :			back-traces.)
2109 :
2110 :			- Asymptotic time- and space-complexity of instrumented code is
2111 :			equal to that of uninstrumented code. (This means that
2112 :			tail-recursion is preserved by the instrumentation phase.)
2113 :
2114 :			- Modules whose code has been instrumented in different sessions
2115 :			work together without problem.
2116 :
2117 :			- There is no penalty whatsoever on uninstrumented code.
2118 :
2119 :			- There is no penalty on "raise" expressions, even in
2120 :			instrumented code.
2121 :
2122 :			A potential bug (or perhaps it is a feature, too):
2123 :
2124 :			A back-trace reaches no further than the outermost instrumented
2125 :			non-trivial "raise". Here, a "trivial" raise is one that is the
2126 :			sole RHS of a "handle" rule. Thus, back-traces reach trough
2127 :
2128 :			<exp> handle e => raise e
2129 :
2130 :			and even
2131 :
2132 :			<exp> handle Foo => raise Bar
2133 :
2134 :			and, of course, through
2135 :
2136 :			<exp> handle Foo => ...
2137 :
2138 :			if the exception was not Foo.
2139 :
2140 :			Back-traces always reach right through any un-instrumented code
2141 :			including any of its "handle" expressions, trivial or not.
2142 :
2143 :			To try this out, do the following:
2144 :
2145 :			- Erase all existing binfiles for your program.
2146 :			(You may keep binfiles for those modules where you think you
2147 :			definitely don't need back-tracing.)
2148 :			- Turn on back-trace instrumentation:
2149 :			SMLofNJ.Internals.BTrace.mode (SOME true);
2150 :			- Recompile your program. (I.e., run "CM.make" or "use".)
2151 :			- You may now turn instrumentation off again (if you want):
2152 :			SMLofNJ.Internals.BTrace.mode (SOME false);
2153 :			- Run your program as usual. If it raises an exception that
2154 :			reaches the interactive toplevel, then a back-trace will
2155 :			automatically be printed. After that, the toplevel loop
2156 :			will print the exception history as usual.
2157 :
2158 :			----------------------------------------------------------------------
2159 :			Name: Matthias Blume
2160 :	blume	677	Date: 2000/06/26 09:56:46 JST
2161 :			Tag: blume-20000626-setup
2162 :			Description:
2163 :
2164 :			CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2165 :			ML code before and after compiling a file (e.g., to set compiler
2166 :			flags)
2167 :
2168 :			Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2169 :			- associated changes to btrace.sml (BTrace instrumentation pass)
2170 :			- cleaner implementation of btimp.sml (BTrace tracing and report
2171 :			module)
2172 :
2173 :			CM manual: * new path encoding documented
2174 :			* description of setup-parameter to "sml" added
2175 :
2176 :			The biggest user-visible change to back-tracing is that it is no
2177 :			longer necessary to compile all traced modules within the same
2178 :			session. (This was a real limitation.)
2179 :
2180 :			----------------------------------------------------------------------
2181 :			Name: Matthias Blume
2182 :	blume	676	Date: 2000/06/24 12:40:00 JST
2183 :			Tag: blume-20000624-startup
2184 :			Description:
2185 :
2186 :			Fixes startup slowdown problem. (I was calling SrcPath.sync a _tad_
2187 :			bit too often -- to put it mildly. :)
2188 :
2189 :			----------------------------------------------------------------------
2190 :			Name: Matthias Blume
2191 :	blume	675	Date: 2000/06/23 18:20:00 JST
2192 :			Tag: blume-20000623-btrace
2193 :			Description:
2194 :
2195 :			This updates adds a backtrace facility to aid programmers in debugging
2196 :			their programs. This involves the following changes:
2197 :
2198 :			1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2199 :			keeping track of the current call stack. When programs are compiled
2200 :			in a special mode, the compiler will insert calls to these hooks
2201 :			into the user program.
2202 :			"Hook" means that it is possible for different implementations of
2203 :			back-tracing to register themselves (at different times).
2204 :
2205 :			2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2206 :			as an Absyn.dec->Absyn.dec rewrite. Normally this phase is turned off.
2207 :			It can be turned on using this call:
2208 :			SMLofNJ.Internals.BTrace.mode (SOME true);
2209 :			Turning it off again:
2210 :			SMLofNJ.Internals.BTrace.mode (SOME false);
2211 :			Querying the current status:
2212 :			SMLofNJ.Internals.BTrace.mode NONE;
2213 :			Annotated programs are about twice as big as normal ones, and they
2214 :			run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2215 :			where all hooks do nothing). The slowdown with a plugin that is
2216 :			actually useful (such as the one supplied by default) is even greater,
2217 :			but in the case of the default plugin it is still only an constant
2218 :			factor (amortized).
2219 :
2220 :			3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2221 :			with a sub-structure BTrace for controlling back-tracing. In particular,
2222 :			the above-mentioned function "mode" controls whether the annotation
2223 :			phase is invoked by the compiler. Another important function is
2224 :			"trigger": when called it aborts the current execution and causes
2225 :			the top-level loop to print a full back-trace.
2226 :
2227 :			4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2228 :			for back-tracing. It keeps track of the dynamic call stack and in
2229 :			addition to that it keeps a partial history at each "level" of that
2230 :			stack. For example, if a tail-calls b, b tail-calls c, and c tail-calls
2231 :			d and b (at separate times, dynamically), then the report will show:
2232 :
2233 :			GOTO d
2234 :			/c
2235 :			GOTO \b
2236 :			CALL a
2237 :
2238 :			This shows that there was an initial non-tail call of a, then a
2239 :			tail-call to b or c, looping behavior in a cluster of functions that
2240 :			consist of b and c, and then a goto from that cluster (i.e., either from
2241 :			b or from c) to d.
2242 :
2243 :			Note that (depending on the user program) the amount of information
2244 :			that the back-trace module has to keep track of at each level is bounded
2245 :			by a constant. Thus, the whole implementation has the same asymptotical
2246 :			complexity as the original program (both in space and in time).
2247 :
2248 :			5. compiler/TopLevel/interact/evalloop.sml has been modified to
2249 :			handle the special exception SMLofNJ.Internals.BTrace.BTrace
2250 :			which is raised by the "trigger" function mentioned above.
2251 :
2252 :			Notes on usage:
2253 :
2254 :			- Annotated code works well together with unannotated code:
2255 :			Unannotated calls simply do not show up at all in the backtrace.
2256 :
2257 :			- It is not a good idea to let modules that were annotated during
2258 :			different sessions run at the same time. This is because the compiler
2259 :			chooses small integers to identify individual functions, and there
2260 :			will be clashes if different modules were compiled in separate sessions.
2261 :			(Nothing will crash, and you will even be told about the clashes, but
2262 :			back-trace information will in general not be useful.)
2263 :
2264 :			- Back-tracing can be confused by callcc and capture.
2265 :
2266 :			- The only way of getting a back-trace right now is to explicitly
2267 :			invoke the "trigger" function from your user program. Eventually, we
2268 :			should make every exception carry back-trace information (if
2269 :			available). But since this creates more overhead at "raise"-time
2270 :			(similar to the current exnHistory overhead), I have not yet
2271 :			implemented this. (The implementation will be rather easy.) With
2272 :			exceptions carrying back-trace information, this facility will be even
2273 :			more useful because users don't need to modify their programs...
2274 :
2275 :			- While it is possible to compile the compiler with back-trace
2276 :			annotations turned on (I did it to get some confidence in
2277 :			correctness), you must make absolutely sure that core.sml and
2278 :			btimp.sml are compiled WITHOUT annotation! (core.sml cannot actually
2279 :			be compiled with annotation because there is no core access yet, but
2280 :			if you compile btimp.sml with annotation, then the system will go into
2281 :			an infinite recursion and crash.)
2282 :			Since CM currently does not know about BTrace, the only way to turn
2283 :			annotations on and off for different modules of the compiler is to
2284 :			interrupt CMB.make, change the settings, and re-invoke it. Of course,
2285 :			this is awkward and clumsy.
2286 :
2287 :			Sample sessions:
2288 :
2289 :			Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2290 :			- SMLofNJ.Internals.BTrace.mode (SOME true);
2291 :			[autoloading]
2292 :			[autoloading done]
2293 :			val it = false : bool
2294 :			- structure X = struct
2295 :			- fun main n = let
2296 :			- fun a (x, 0) = d x
2297 :			- | a (x, n) = b (x, n - 1)
2298 :			- and b (x, n) = c (x, n)
2299 :			- and c (x, n) = a (x, n)
2300 :			- and d x = e (x, 3)
2301 :			- and e (x, 0) = f x
2302 :			- | e (x, n) = e (x, n - 1)
2303 :			- and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2304 :			- | f n = n * g (n - 1)
2305 :			- and g n = a (n, 3)
2306 :			- in
2307 :			- f n
2308 :			- end
2309 :			- end;
2310 :			structure X : sig val main : int -> int end
2311 :			- X.main 3;
2312 :			*** BACK-TRACE ***
2313 :			GOTO stdIn:4.2-13.20: X.main[2].f
2314 :			GOTO-( stdIn:4.2-13.20: X.main[2].e
2315 :			GOTO stdIn:4.2-13.20: X.main[2].d
2316 :			/ stdIn:4.2-13.20: X.main[2].a
2317 :			| stdIn:4.2-13.20: X.main[2].b
2318 :			GOTO-\ stdIn:4.2-13.20: X.main[2].c
2319 :			CALL stdIn:4.2-13.20: X.main[2].g
2320 :			GOTO stdIn:4.2-13.20: X.main[2].f
2321 :			GOTO-( stdIn:4.2-13.20: X.main[2].e
2322 :			GOTO stdIn:4.2-13.20: X.main[2].d
2323 :			/ stdIn:4.2-13.20: X.main[2].a
2324 :			| stdIn:4.2-13.20: X.main[2].b
2325 :			GOTO-\ stdIn:4.2-13.20: X.main[2].c
2326 :			CALL stdIn:4.2-13.20: X.main[2].g
2327 :			GOTO stdIn:4.2-13.20: X.main[2].f
2328 :			GOTO-( stdIn:4.2-13.20: X.main[2].e
2329 :			GOTO stdIn:4.2-13.20: X.main[2].d
2330 :			/ stdIn:4.2-13.20: X.main[2].a
2331 :			| stdIn:4.2-13.20: X.main[2].b
2332 :			GOTO-\ stdIn:4.2-13.20: X.main[2].c
2333 :			CALL stdIn:4.2-13.20: X.main[2].g
2334 :			GOTO stdIn:4.2-13.20: X.main[2].f
2335 :			CALL stdIn:2.15-17.4: X.main[2]
2336 :			-
2337 :
2338 :			(Note that because of a FLINt bug the above code currently does not
2339 :			compile without BTrace turned on.)
2340 :
2341 :			Here is another example, using my modified Tiger compiler:
2342 :
2343 :			Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2344 :			- SMLofNJ.Internals.BTrace.mode (SOME true);
2345 :			[autoloading]
2346 :			[autoloading done]
2347 :			val it = false : bool
2348 :			- CM.make "sources.cm";
2349 :			[autoloading]
2350 :			...
2351 :			[autoloading done]
2352 :			[scanning sources.cm]
2353 :			[parsing (sources.cm):parse.sml]
2354 :			[creating directory CM/SKEL ...]
2355 :			[parsing (sources.cm):tiger.lex.sml]
2356 :			...
2357 :			[wrote CM/sparc-unix/semant.sml]
2358 :			[compiling (sources.cm):main.sml]
2359 :			[wrote CM/sparc-unix/main.sml]
2360 :			[New bindings added.]
2361 :			val it = true : bool
2362 :			- Main.compile ("../testcases/merge.tig", "foo.out");
2363 :			*** BACK-TRACE ***
2364 :			CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2365 :			CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2366 :			CALL lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2367 :			GOTO lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2368 :			CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2369 :			CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2370 :			CALL lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2371 :			/ lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2372 :			CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2373 :			CALL lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2374 :			CALL lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2375 :			CALL main.sml:1.18-118.4: Main.compile[2]
2376 :			-
2377 :
2378 :			----------------------------------------------------------------------
2379 :	blume	673	Name: Matthias Blumen
2380 :			Date: 2000/06/21 18:00:00 JST
2381 :			Tag: blume-20000621-manual
2382 :			Description:
2383 :
2384 :			CM manual update: Path environments documented.
2385 :
2386 :			----------------------------------------------------------------------
2387 :	blume	666	Name: Matthias Blume
2388 :	blume	672	Date: 2000/06/19 13:40:00
2389 :			Tag: blume-20000619-manual
2390 :			Description:
2391 :
2392 :			CM manual and system/README update. This only covers the fact that
2393 :			there are no more implicit anchors. (Path environments and the "bind"
2394 :			option to "cm" have yet to be documented.)
2395 :
2396 :			----------------------------------------------------------------------
2397 :			Name: Matthias Blume
2398 :	blume	671	Date: 2000/06/19 11:05:00 JST
2399 :			Tag: blume-20000619-chdir-bugfix
2400 :			Description:
2401 :
2402 :			Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2403 :
2404 :			----------------------------------------------------------------------
2405 :			Name: Matthias Blume
2406 :	blume	670	Date: 2000/06/18 22:00:10 JST
2407 :			Tag: blume-20000618-implicit-anchors-really-gone
2408 :			Description:
2409 :
2410 :			I updates the previous HISTORY entry where I forgot to mention that
2411 :			implicit anchors are no longer with us.
2412 :
2413 :			The current update also gets rid of the (now useless) controller
2414 :			CM.Control.implicit_anchors.
2415 :
2416 :			----------------------------------------------------------------------
2417 :			Name: Matthias Blume
2418 :	blume	666	Date: 2000/06/16 17:30:00 JST
2419 :			Tag: blume-20000616-anchorenv
2420 :			Description:
2421 :
2422 :			This patch implements the long anticipated (just kidding :) "anchor
2423 :			environment" mechanism. In the course of doing this, I also
2424 :			re-implemented CM's internal "SrcPath" module from scratch. The new
2425 :			one should be more robust in certain boundary cases. In any case, it
2426 :			is a lot cleaner than its predecessor (IMHO).
2427 :
2428 :			This time, although there is yet another boot file format change, I
2429 :			kept the unpickler backward-compatible. As a result, no new bootfiles
2430 :			are necessary and bootstrapping is straightforward. (You cannot read
2431 :			new bootfiles into an old system, but the other way around is no
2432 :			problem.)
2433 :
2434 :			Visible changes:
2435 :
2436 :	blume	670	** 0. Implicit path anchors (without the leading $-symbol) are no
2437 :			longer recognized at all. This means that such path names are not
2438 :			illegal either. For example, the name basis.cm simply refers to a
2439 :			local file called "basis.cm" (i.e, the name is an ordinary path
2440 :			relative to .cm-files directory). Or, to put it differently, only
2441 :			names that start with $ are anchored paths.
2442 :	blume	666
2443 :	blume	670	** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2444 :			vanished.
2445 :
2446 :			John (Reppy) had critizised this as soon as I originally proposed and
2447 :	blume	666	implemented it, but at that time I did not really deeply believe
2448 :			him. :) Now I came full-circle because I need the $<singlearc> syntax
2449 :			in another place where it cannot be seen as an abbreviation for
2450 :			$/<singlearc>. To avoid the confusion, $<singlearc> now means what it
2451 :			seems to mean (i.e., it "expands" into the corresponding anchor
2452 :			value).
2453 :
2454 :			However, when paths are used as members in CM description files, it
2455 :			continues to be true that there must be at least another arc after the
2456 :			anchor. This is now enforced separately during semantic analysis
2457 :	blume	670	(i.e., from a lexical/syntactical point of view, the notation is ok.)
2458 :	blume	666
2459 :			** 2. The "cm" class now accepts an option "bind". The option's value
2460 :			is a sub-option list of precisely two items -- one labeled "anchor"
2461 :			and the other one labeled "value". As you might expect, "anchor" is
2462 :			used to specify an anchor name to be bound, and "value" specifies what
2463 :			the anchor is being bound to.
2464 :
2465 :			The value must be a directory name and can be given in either standard
2466 :			syntax (including the possibility that it is itself an anchored path)
2467 :			or native syntax.
2468 :
2469 :			Examples:
2470 :
2471 :			foo.cm (bind:(anchor:bar value:$mystuff/bar))
2472 :			lib.cm (bind:(anchor:a value:"H:\\x\\y\\z")) (* only works under windows *)
2473 :
2474 :			and so on.
2475 :
2476 :			The meaning of this is that the .cm-file will be processed with an
2477 :			augmented anchor environment where the given anchor(s) is/are bound to
2478 :			the given values(s).
2479 :
2480 :			The rationale for having this feature is this: Suppose you are trying
2481 :			to use two different (already stable) libraries a.cm and b.cm (that
2482 :			you perhaps didn't write yourself). Further, suppose each of these
2483 :			two libraries internally uses its own auxiliary library $aux/lib.cm.
2484 :			Normally you would now have a problem because the anchor "lib" can not
2485 :			be bound to more than one value globally. Therefore, the project that
2486 :			uses both a.cm and b.cm must locally redirect the anchor to some other
2487 :			place:
2488 :
2489 :			a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2490 :			b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2491 :
2492 :			This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2493 :			/usr/lib/smlnj/b-stuff/aux.cm, respectively.
2494 :
2495 :			Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2496 :			you when you do so at the time of CM.stabilize). Therefore, you can
2497 :			also use an anchored path as the value:
2498 :
2499 :			a.cm (bind:(anchor:lib value:$a-lib))
2500 :			b.cm (bind:(anchor:lib value:$b-lib))
2501 :
2502 :			Now you can globally configure (using the usual CM.Anchor.anchor or
2503 :			pathconfig machinery) bindings for "a-lib" and "b-lib". Since "lib"
2504 :			itself is always locally bound, setting it globally is no longer
2505 :			meaningful or necessary (but it does not hurt either). In fact, "lib"
2506 :			can still be used as a global anchor for separate purposes. As a
2507 :			matter of fact, one can locally define "lib" in terms of a global
2508 :			"lib":
2509 :
2510 :			a.cm (bind:(anchor:lib value:$lib/a))
2511 :			b.cm (bind:(anchor:lib value:$lib/b))
2512 :
2513 :			** 3: The encoding of path names has changed. This affects the way
2514 :			path names are shown in CM's progress report and also the internal
2515 :			protocol encoding used for parallel make.
2516 :
2517 :			The encoding now uses one or more ':'-separated segments. Each
2518 :			segments corresponds to a file that has been specified relative to the
2519 :			file given by its preceding segment. The first segment is either
2520 :			relative to the CWD, absolute, or anchored. Each segment itself is
2521 :			basically a Unix pathname; all segments but the first are relative.
2522 :
2523 :			Example:
2524 :
2525 :			$foo/bar/baz.cm:a/b/c.sml
2526 :
2527 :			This path denotes the file bar/a/b/c.sml relative to the directory
2528 :			denoted by anchor "foo". Notice that the encoding also includes
2529 :			baz.cm which is the .cm-file that listed a/b/c.sml. As usual, such
2530 :			paths are resolved relative to the .cm-files directory, so baz.cm must
2531 :			be ignored to get the "real" pathname.
2532 :
2533 :			To make this fact more obvious, CM puts the names of such "virtual
2534 :			arcs" into parentheses when they appear in progress reports. (No
2535 :			parentheses will appear in the internal protocol encoding.) Thus,
2536 :			what you really see is:
2537 :
2538 :			$foo/bar/(baz.cm):a/b/c.sml
2539 :
2540 :			I find this notation to be much more informative than before.
2541 :
2542 :			Another new feature of the encoding is that special characters
2543 :			including parentheses, colons, (back)slashes, and white space are
2544 :			written as \ddd (where ddd is the decimal encoding of the character).
2545 :
2546 :	blume	670	*** The CM manual still needs to be updated.
2547 :
2548 :	blume	666	----------------------------------------------------------------------
2549 :	leunga	660	Name: Allen Leung
2550 :			Date: 2000/06/15 00:38:00
2551 :			Tag: leunga-20000615-x86-peephole
2552 :
2553 :			x86 Peephole fix by Fermin. Affects c-- and moby only.
2554 :
2555 :			----------------------------------------------------------------------
2556 :	blume	658	Name: Matthias Blume
2557 :			Date: 2000/06/12 11:40:00
2558 :			Tag: blume-20000612-parmakefix
2559 :			Description:
2560 :
2561 :			More cleanup after changing the file naming scheme: This time I
2562 :			repaired the parallel make mechanism for CMB.make which I broke earlier.
2563 :
2564 :			----------------------------------------------------------------------
2565 :	leunga	657	Name: Allen Leung
2566 :			Date: 2000/06/09 01:25:00
2567 :			Tag: leunga-20000609-various
2568 :
2569 :			None of these things should affect normal SML/NJ operations
2570 :
2571 :			1. Peephole improvements provided by Fermin (c--)
2572 :			2. New annotation DEFUSE for adding extra dependence (moby)
2573 :			3. New X86 LOCK instructions (moby)
2574 :			4. New machine description language for reservation tables (scheduling)
2575 :			5. Fixes to various optimization/analysis modules (branch chaining, dominator
2576 :			trees etc.)
2577 :			6. I've changed the CM files so that they can work with versions
2578 :			110.0.6, 110.25 and 110.28
2579 :
2580 :			----------------------------------------------------------------------
2581 :	blume	652	Name: Matthias Blume
2582 :	blume	656	Date: 2000/06/09 12:40:00
2583 :			Tag: blume-20000609-log
2584 :			Description:
2585 :
2586 :			- Removed all(?) remaining RCS Log entries from sources.
2587 :
2588 :			- Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2589 :			anchored paths).
2590 :
2591 :			----------------------------------------------------------------------
2592 :			Name: Matthias Blume
2593 :	blume	653	Date: 2000/06/07 17:00:00 JST
2594 :			Tag: blume-20000607-no-implicit-anchors
2595 :			Description:
2596 :
2597 :			1. This update changes the default setting for
2598 :			CM.Control.implicit_anchors from true to false. This means that
2599 :			implicit anchors are no longer permitted by default. I also tried to
2600 :			make sure that nothing else still relies on implicit anchors.
2601 :			(This is the next step on the schedule towards a CM that does not even
2602 :			have the notion of implicit anchors anymore.)
2603 :
2604 :			2. More CM manual updates.
2605 :
2606 :			3. I managed to track down and fix the pickling bug I mentioned last
2607 :			time. Because of the previously existing workaround, this entails no
2608 :			immediate practical changes.
2609 :
2610 :			----------------------------------------------------------------------
2611 :			Name: Matthias Blume
2612 :	blume	652	Date: 2000/06/06 11:15:00 JST
2613 :			Tag: blume-20000606-lazierpickle
2614 :			Description:
2615 :
2616 :			!!!! NEW BOOT FILES !!!!
2617 :
2618 :			* The main purpose of this update is to make library pickles lazier in
2619 :			order to reduce the initial space penalty for autoloading a library.
2620 :			As a result, it is now possible to have $smlnj/compiler.cm
2621 :			pre-registered. This should take care of the many complaints or
2622 :			inquiries about missing structure Compiler. This required changes to
2623 :			CM's internal data structures and small tweaks to some algorithms.
2624 :
2625 :			As a neat additional effect, it is no longer necessary (for the sake
2626 :			of lean heap image files) to distinguish between a "minimal" CM and a
2627 :			"full" CM. Now, there is only one CM (i.e., the "full" version:
2628 :			$smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2629 :			interactive top level. ($smlnj/cm/minimal.cm is gone.)
2630 :
2631 :			To make the life of compiler-hackers easier, "makeml" now also
2632 :			pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm). In other
2633 :			words, after you bootstrap a new sml for the first time, you will not
2634 :			have to autoload $smlnj/cmb.cm again afterwards. (The first time
2635 :			around you will still have to do it, though.)
2636 :
2637 :			* A second change consists of major updates to the CM manual. There
2638 :			are now several appendices with summary information and also a full
2639 :			specification of the CM description file syntax.
2640 :
2641 :			* In directory src/system I added the script "allcross". This script
2642 :			invokes sml and cross-compiles the compiler for all supported
2643 :			architectures. (Useful when providing a new set of boot files.)
2644 :
2645 :			* There seems to be a latent bug in my "lazy pickles" mechanism. I
2646 :			added a small tweak to pickle-util.sml to work around this problem,
2647 :			but it is not a proper fix yet. I will investigate further. (The
2648 :			effect of the bug was an inflation of library pickle size.)
2649 :
2650 :			* Version number increased to 110.28.1 (to avoid compatibility problems).
2651 :
2652 :			----------------------------------------------------------------------
2653 :	leunga	646	Name: Allen Leung
2654 :	leunga	648	Date: 2000/05/25 17:28 EDT
2655 :			Tag: leunga-20000525-ra
2656 :			Description:
2657 :
2658 :			Fixed a bug in freezing phase of the register allocator.
2659 :
2660 :			----------------------------------------------------------------------
2661 :			Name: Allen Leung
2662 :	leunga	647	Date: 2000/05/15 22:53 EDT
2663 :	leunga	646	Tag: leunga-20000515-alpha-x86-ra
2664 :			Description:
2665 :
2666 :			1. Alpha
2667 :
2668 :			Slight cleanup. Removed the instruction SGNXL
2669 :
2670 :			2. X86
2671 :
2672 :			Added the following instructions to the instruction set:
2673 :
2674 :			ROLx, RORx,
2675 :			BTx, BTSx, BTLx, BTRx,
2676 :			XCHGx, and variants with the LOCK prefix
2677 :
2678 :			3. Register Allocation
2679 :
2680 :			The module ra-rewrite-with-renaming has been improved.
2681 :
2682 :	leunga	647	These have no effect on SML/NJ.
2683 :
2684 :	leunga	646	----------------------------------------------------------------------
2685 :	blume	642	Name: Matthias Blume
2686 :	blume	645	Date: 2000/05/15 16:20:00 JST
2687 :			Tag: blume-20000515-lightrebuild
2688 :			Description:
2689 :
2690 :			1. I added an alternative to "-rebuild" to "makeml". The difference is
2691 :			that prior to calling CMB.make' the CM-variable "LIGHT" will be
2692 :			defined. In effect, the command will not build any cross-compiler
2693 :			backends and therefore finish more quickly.
2694 :
2695 :			The "fixpt" script also takes a "-light" switch to be able to use
2696 :			this new facility while compiling for a fixpoint.
2697 :
2698 :			2. I replaced all mentions of anchored paths in group owner specifications
2699 :			with simple relative paths (usually starting with "..").
2700 :			The rationale is that a library's internal workings should not be
2701 :			compromised by the lack of some anchor. (An anchor is necessary
2702 :			for someone who wants to refer to the library by an anchored path,
2703 :			but it should not be necessary to build the same library in the first
2704 :			place.)
2705 :
2706 :			3. I changed the way CM's tool mechanism determines the shell command
2707 :			string used for things like ml-yacc etc. so that it does not break
2708 :			when CM.Control.implicit_anchors is turned off.
2709 :
2710 :			----------------------------------------------------------------------
2711 :			Name: Matthias Blume
2712 :	blume	644	Date: 2000/05/12 18:20:00 JST
2713 :			Tag: blume-20000512-ml-build
2714 :			Description:
2715 :
2716 :			Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
2717 :			getting installed properly (by config/install.sh).
2718 :
2719 :			----------------------------------------------------------------------
2720 :			Name: Matthias Blume
2721 :	blume	643	Date: 2000/05/12 17:30:00 JST
2722 :			Tag: blume-20000512-anchors
2723 :			Description:
2724 :
2725 :			!!! NEW BOOT FILES !!!
2726 :
2727 :			This change is in preparation of fading out support for "implicitly
2728 :			anchored path names". I went through all sources and used the
2729 :			explicit (and relatively new) $-notation. See system/README and the
2730 :			CM manual for more info on this.
2731 :
2732 :			I also modified the anchoring scheme for some things such as "smlnj",
2733 :			"MLRISC", "cm", etc. to take advantage of the fact that explicit
2734 :			anchors are more expressive: anchor name and first arc do not have to
2735 :			coincide. This entails the following user-visible change:
2736 :
2737 :			You have to write $smlnj/foo/bar instead of smlnj/foo/bar. In
2738 :			particular, when you fire up sml with a command-line argument, say,
2739 :			e.g.:
2740 :
2741 :			sml '$smlnj/cmb.cm'
2742 :
2743 :			At the ML toplevel prompt:
2744 :
2745 :			CM.autoload "$smlnj/cmb.cm";
2746 :
2747 :			There is also a new controller in CM.Control that can be used to turn
2748 :			off all remaining support for implicit anchors by saying:
2749 :
2750 :			CM.autoload "$smlnj/
2751 :			#set CM.Control.implicit_anchors false;
2752 :
2753 :			This causes CM to reject implicitly anchored paths. This is (for the
2754 :			time being) less permissive than the "final" version where there will
2755 :			be no more such implicit anchors and relative paths will be just that:
2756 :			relative.
2757 :
2758 :			The next step (version after next version?) will be to make the
2759 :			default for CM.Control.implicit_anchors false. After the dust has
2760 :			settled, I can then produce the "final" version of this...
2761 :
2762 :			Note: Since bootstrapping is a bit tricky, I provided new boot files.
2763 :
2764 :			----------------------------------------------------------------------
2765 :			Name: Matthias Blume
2766 :	blume	642	Date: 2000/05/11 16:30:00 JST
2767 :			Tag: blume-20000511-sources
2768 :			Description:
2769 :
2770 :			The main change is that I added function CM.sources as a generalized
2771 :			version of the earlier CM.makedepend. This entails the following
2772 :			additional changes:
2773 :
2774 :			- CM.makedepend has been dropped.
2775 :
2776 :			- CM manual has been updated.
2777 :
2778 :			- TOOLS signature and API have been changed.
2779 :
2780 :			----------------------------------------------------------------------
2781 :	leunga	640	Name: Allen Leung
2782 :	leunga	641	Date: 2000/05/10 21:17 EDT
2783 :			Tag: leunga-20000510-moby-c--ssa
2784 :			Description:
2785 :
2786 :			Various bug fixes and new features for C--, Moby and MLRISC optimizations.
2787 :			None of these affect SML/NJ.
2788 :
2789 :			1. Register Allocation
2790 :
2791 :			a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
2792 :			This module tries to remove local (i.e. basic block level) redundancies
2793 :			during spilling.
2794 :
2795 :			b. A new framework for performing region based register allocation.
2796 :			Not yet entirely functional.
2797 :
2798 :			2. X86
2799 :
2800 :			a. DefUse for POP was missing the stack pointer [found by Lal]
2801 :			b. Reload for CALL was incorrect in X86Spill [found by John]
2802 :			c. Various fixes in X86Spill so that it can be used correctly for
2803 :			the new spilling module.
2804 :
2805 :			3. SSA/IR
2806 :
2807 :			a. New module ir/dj-dataflow.sml implements elimination based
2808 :			data flow analysis.
2809 :
2810 :			4. MLRiscGen
2811 :
2812 :			a. Fix for gc type annotation
2813 :
2814 :			5. MDGen
2815 :
2816 :			Various fixes for machine description -> ml code translation. For ssa
2817 :			only.
2818 :
2819 :			----------------------------------------------------------------------
2820 :			Name: Allen Leung
2821 :	leunga	640	Date: 2000/05/08 22:17 EDT
2822 :			Tag: leunga-20000508-labexp
2823 :			Description:
2824 :
2825 :			Fermin has found a few assembly problems with constant expressions
2826 :			generated in LabelExp. Mostly, the problems involve extra parentheses,
2827 :			which choke on dumb assemblers. This is his fix.
2828 :
2829 :			----------------------------------------------------------------------
2830 :	dbm	635	Name: Dave MacQueen
2831 :			Date: 2000/04/09 14:00 EDT
2832 :			Tag: dbm-20000502-Version_110_28
2833 :			Description:
2834 :
2835 :			1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
2836 :
2837 :			2. Updated config/version to 110.28
2838 :
2839 :			3. Updated config/srcarchiveurl
2840 :
2841 :			3. New boot files!
2842 :			ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
2843 :
2844 :			----------------------------------------------------------------------
2845 :	blume	634	Name: Matthias Blume
2846 :			Date: 2000/05/01 19:05:00 JST
2847 :			Tag: blume-20000501-noweb
2848 :			Description:
2849 :
2850 :			A new noweb tool has been added. The existing system is entirely
2851 :			unaffected by this, but some CM users have asked for renewed noweb
2852 :			support. Everything is documented in the CM manual.
2853 :
2854 :			New (plugin) libraries:
2855 :
2856 :			noweb-tool.cm
2857 :			nw-ext.cm
2858 :
2859 :			----------------------------------------------------------------------
2860 :	dbm	633	Name: Dave MacQueen
2861 :			Date: 2000/04/30 12:40PM EDT
2862 :			Tag: dbm-20000430-bug_fixes
2863 :			Description:
2864 :
2865 :			1. Fix for bug 1498
2866 :			smlnj/src/system/Basis/Implementation/Unsafe/object.sig
2867 :			smlnj/src/system/Basis/Implementation/Unsafe/object.sml
2868 :			added toRealArray function
2869 :			smlnj/src/compiler/MiscUtil/print/ppobj.sml
2870 :			added check for tag Obj.RealArray to array printing case in ppObj
2871 :
2872 :			2. Fix for bug 1510
2873 :			smlnj/src/compiler/Semant/types/typesutil.sml
2874 :			fixed definition of dummyargs (used by equalTycon) so that
2875 :			dummy args are distinct types
2876 :
2877 :			----------------------------------------------------------------------
2878 :	blume	629	Name: Matthias Blume
2879 :	blume	632	Date: 2000/04/30 01:00:00 JST
2880 :			Tag: blume-20000430-versions
2881 :			Description:
2882 :
2883 :			1. CM version numbering added. This is an implementation of Lal's
2884 :			proposal for adding version numbers and version checking to .cm
2885 :			files. Lal said that his proposal was just that -- a proposal.
2886 :			For the time being I went ahead and implemented it so that people
2887 :			can comment on it. Everything is completely backward-compatible
2888 :			(except for the stable library format, i.e., new bootfiles!).
2889 :
2890 :			As usual, see the CM manual for details.
2891 :
2892 :			2. An alternative syntax for anchored paths has been implemented.
2893 :			Dave has recently voiced the same concerns that I had when I did
2894 :			this, so there should be some support. My take is that eventually
2895 :			I will let support for the current syntax (where anchors are
2896 :			"implicit") fade out in favor of the new, explicit syntax.
2897 :			In order to be backward-compatible, both old and new syntax are
2898 :			currently supported.
2899 :
2900 :			Again, see the CM manual for details.
2901 :
2902 :			3. Parallel make is trying to be slightly smarter: When the master
2903 :			process finds a "bottleneck", i.e., when there is only one
2904 :			compilation unit that can be compiled and everybody else is
2905 :			waiting on it, then it will simply compile it directly instead
2906 :			of clumsily telling one of the slaves to do it.
2907 :
2908 :			4. Support for "unsharing" added. This is necessary in order to be
2909 :			able to have two different versions of the same library running
2910 :			at the same time (e.g., for trying out a new MLRISC while still
2911 :			having the old MLRISC linked into the current compiler, etc.)
2912 :			See the CM manual.
2913 :
2914 :			5. Simple "makedepend" functionality added for generating Makefile
2915 :			dependency information. (This is rather crude at the moment.
2916 :			Expect some changes here in the future.)
2917 :
2918 :			6. ".fun" added as a recognized suffix for ML files. Also documented
2919 :			explicitly in the manual that the fallback behavior (unknown suffix
2920 :			-> ML file) is not an official feature!
2921 :
2922 :			7. Small changes to the pickler for stable libraries.
2923 :
2924 :			8. Several internal changes to CM (for cleanup/improvement).
2925 :
2926 :
2927 :			!!!! NEW BINFILES !!!!
2928 :
2929 :			----------------------------------------------------------------------
2930 :			Name: Matthias Blume
2931 :	blume	631	Date: 2000/04/28 17:30:00 JST
2932 :			Tag: blume-20000428-pathconfig
2933 :			Description:
2934 :
2935 :			1. I changed config/install.sh to remove duplicate entries from the
2936 :			lib/pathconfig file at the end. Moreover, the final version of
2937 :			lib/pathconfig is sorted alphabetically. The same (sorting) is done
2938 :			in src/system/installml.
2939 :
2940 :			2. The config/install.sh script now consistently uses relative
2941 :			pathnames in lib/pathconfig whenever the anchor is in the lib
2942 :			directory. (So far this was true for the libraries that come
2943 :			pre-compiled and bundled as part of the bootfiles but not for
2944 :			libraries that are compiled by the script itself.)
2945 :
2946 :			----------------------------------------------------------------------
2947 :			Name: Matthias Blume
2948 :	blume	629	Date: 2000/04/26 13:10:00 JST
2949 :			Tag: blume-20000426-fun_suffix
2950 :			Description:
2951 :
2952 :			Added ".fun" as a recognized file name suffix (for ML code).
2953 :
2954 :			----------------------------------------------------------------------
2955 :	leunga	628	Name: Allen Leung
2956 :			Date: 2000/04/25 17:00:00 EST
2957 :			Tag: leunga-20000425-alpha-ra
2958 :			Description:
2959 :
2960 :			1. Alpha
2961 :
2962 :			PSEUDOARITH was missing in AlphaRewrite. This causes an endless loop
2963 :			in C--.
2964 :
2965 :			2. RA
2966 :
2967 :			Added a flag "ra-dump-size" to print out the size of the flowgraph
2968 :			and the interference graph.
2969 :
2970 :			----------------------------------------------------------------------
2971 :	dbm	627	Name: Dave MacQueen
2972 :			Date: 2000/04/25/
2973 :			Tag: dbm-20000425-mlyacc_doc_examples
2974 :			Description:
2975 :			Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
2976 :			Updated all three examples in src/ml-yacc/examples to run
2977 :			under 110.* using CM.make.
2978 :
2979 :			----------------------------------------------------------------------
2980 :	leunga	624	Name: Allen Leung
2981 :			Date: 2000/04/20 23:04:00 EST
2982 :			Tag: leunga-20000420-ssa-c---stuff
2983 :			Description:
2984 :
2985 :			This update synchronizes my repository with Yale's. Most of these
2986 :			changes, however, do not affect SML/NJ at all (the RA is an exception).
2987 :
2988 :			1. Register Allocator
2989 :
2990 :			a. An improvement in the interference graph construction:
2991 :			Given a copy
2992 :
2993 :			s <- t
2994 :
2995 :	leunga	628	no interference edge between s and t is added for this definition of s.
2996 :	leunga	624
2997 :			b. I've added two new spill heuristic modules that Fermin and I developed
2998 :			(in the new library RA.cm). These are unused in SML/NJ but maybe
2999 :			useful for others (Moby?)
3000 :
3001 :			2. X86
3002 :
3003 :			a. Various fixes in the backend provided by Fermin [C--] and Lal.
3004 :
3005 :			3. Alpha
3006 :
3007 :			a. Added the BSR instruction and code generation that goes with it [C--]
3008 :			b. Other fixes too numerous to recount provided by Fermin [C--]
3009 :
3010 :			4. Regmaps
3011 :
3012 :			a. The regmaps are not initialized with the identity physical bindings
3013 :			at creation time. This is unneeded.
3014 :
3015 :			5. MLRISC Optimizations
3016 :
3017 :			a. The DJ-Graph module can now compute the iterated dominance frontiers
3018 :			intersects with liveness incrementally in linear time! Woohoo!
3019 :			This is now used in my new SSA construction algorithm.
3020 :
3021 :			b. THe branch reorganization module is now smarter about linear chains of
3022 :			basic blocks.
3023 :
3024 :
3025 :			----------------------------------------------------------------------
3026 :	blume	615	Name: Matthias Blume
3027 :			Date: 2000/04/12 13:52:00 JST
3028 :			Tag: blume_main_v110p27_1
3029 :			Description:
3030 :
3031 :			Changed install.sh script to handle archive files without version number
3032 :			and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
3033 :			name of the boot file archive.
3034 :
3035 :			----------------------------------------------------------------------
3036 :	dbm	607	Name: Dave MacQueen
3037 :			Date: 2000/04/09 14:00 EDT
3038 :			Tag: dbm-20000410-Version_110_27
3039 :			Description:
3040 :
3041 :			1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
3042 :
3043 :			2. Updated src/config/version to 110.27
3044 :
3045 :			3. New boot files!
3046 :
3047 :			----------------------------------------------------------------------
3048 :	leunga	606	Name: Allen Leung
3049 :			Date: 2000/04/09 19:09:00 EST
3050 :			Tag: leunga-20000409-misc
3051 :			Description:
3052 :
3053 :			1. Yet another fix for x86 assembly for idivl, imull, mull and friends.
3054 :
3055 :			2. Miscellaneous improvements to MLRISC (unused in sml/nj)
3056 :
3057 :			----------------------------------------------------------------------
3058 :	monnier	605	Name: Stefan
3059 :			Date: 2000/04/07 10:00:00 EDT
3060 :			Tag: monnier-20000406-branch-handling
3061 :			Description:
3062 :
3063 :			Improved handling of branches (mostly those generated from
3064 :			polymorphic equality), removed switchoff and changed the
3065 :			default optimization settings (more cpsopt and less flintopt).
3066 :
3067 :			----------------------------------------------------------------------
3068 :	leunga	601	Name: Allen Leung
3069 :	leunga	602	Date: 2000/04/06 01:30:00 EST
3070 :			Tag: leunga-20000406-peephole-x86-SSA-2
3071 :			Description:
3072 :
3073 :			Forgot a few files.
3074 :
3075 :			----------------------------------------------------------------------
3076 :			Name: Allen Leung
3077 :	leunga	601	Date: 2000/04/06 00:36:00 EST
3078 :			Tag: leunga-20000406-peephole-x86-SSA
3079 :			Description:
3080 :
3081 :			1. New Peephole code
3082 :
3083 :			2. Minor improvement to X86 instruction selection
3084 :
3085 :			3. Various fixes to SSA and machine description -> code translator
3086 :
3087 :			----------------------------------------------------------------------
3088 :	blume	595	Name: Matthias Blume
3089 :			Date: 2000/04/05 12:30:00 JST
3090 :			Tag: blume_main_v110p26p2_3
3091 :			Description:
3092 :
3093 :			This update just merges three minor cosmetic updates to CM's sources
3094 :			to get ready for the 110.27 code freeze on Friday. No functionality
3095 :			has changed.
3096 :
3097 :			----------------------------------------------------------------------
3098 :	leunga	593	Name: Allen Leung
3099 :	leunga	594	Date: 2000/04/04 19:39:00 EST
3100 :			Tag: leunga-20000404-x86-asm
3101 :			Description:
3102 :
3103 :			1. Fixed a problem in X86 assembly.
3104 :
3105 :			Things like
3106 :
3107 :			jmp %eax
3108 :			jmp (%eax)
3109 :
3110 :			should be output as
3111 :
3112 :			jmp *%eax
3113 :			jmp *(%eax)
3114 :
3115 :			2. Assembly output
3116 :
3117 :			Added a new flag
3118 :
3119 :			"asm-indent-copies" (default to false)
3120 :
3121 :			When this flag is on, parallel copies will be indented an extra level.
3122 :
3123 :			----------------------------------------------------------------------
3124 :			Name: Allen Leung
3125 :	leunga	593	Date: 2000/04/04 03:18:00 EST
3126 :			Tag: leunga-20000404-C--Moby
3127 :			Description:
3128 :
3129 :			All of these fixes are related to C--, Moby, and my own optimization
3130 :			stuff; so they shouldn't affect SML/NJ.
3131 :
3132 :			1. X86
3133 :
3134 :			Various fixes related floating point, and extensions.
3135 :
3136 :			2. Alpha
3137 :
3138 :			Some extra patterns related to loads with signed/zero extension
3139 :			provided by Fermin.
3140 :
3141 :			3. Assembly
3142 :
3143 :	monnier	659	When generating assembly, resolve the value of client defined constants,
3144 :	leunga	593	instead of generating symbolic values. This is controlled by the
3145 :			new flag "asm-resolve-constants", which is default to true.
3146 :
3147 :			4. Machine Descriptions
3148 :
3149 :			a. The precedence parser was slightly broken when parsing infixr symbols.
3150 :			b. The type generalizing code had the bound variables reversed, resulting
3151 :			in a problem during arity raising.
3152 :			c. Various fixes in machine descriptions.
3153 :
3154 :			----------------------------------------------------------------------
3155 :	blume	592	Name: Matthias Blume
3156 :			Date: 2000/04/03 16:05:00 JST
3157 :			Tag: blume_main_v110p26p2_2
3158 :			Description:
3159 :
3160 :			I eliminated coreEnv from compInfo. Access to the "Core" structure is
3161 :			now done via the ordinary static environment that is context to each
3162 :			compilation unit.
3163 :
3164 :			To this end, I arranged that instead of "structure Core" as "structure
3165 :			_Core" is bound in the pervasive environment. Core access is done via
3166 :	monnier	659	_Core (which can never be accidentally rebound because _Core is not a
3167 :	blume	592	legal surface-syntax symbol).
3168 :
3169 :			The current solution is much cleaner because the core environment is
3170 :			now simply part of the pervasive environment which is part of every
3171 :			compilation unit's context anyway. In particular, this eliminates all
3172 :			special-case handling that was necessary until now in order to deal
3173 :			with dynamic and symbolic parts of the core environment.
3174 :
3175 :			Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3176 :	monnier	659	compilation manager's bootstrap compiler (actually: in the "init group"
3177 :	blume	592	handling). See the comments in src/system/smlnj/init/init.cmi for
3178 :			more details.
3179 :
3180 :			I also tried to track down all mentions of "Core" (as string argument
3181 :			to Symbol.strSymbol) in the compiler and replaced them with a
3182 :			reference to the new CoreSym.coreSym. Seems cleaner since the actual
3183 :			name appears in one place only.
3184 :
3185 :			Binfile and bootfile format have not changed, but the switchover from
3186 :			the old "init.cmi" to the new one is a bit tricky, so I supplied new
3187 :			bootfiles anyway.
3188 :
3189 :			----------------------------------------------------------------------
3190 :	leunga	591	Name: Allen Leung
3191 :			Date: 2000/04/02 21:17:00 EST
3192 :			Tag: leunga-20000402-mltree
3193 :			Description:
3194 :	leunga	585
3195 :	leunga	591	1. Renamed the constructor CALL in MLTREE by popular demand.
3196 :			2. Added a bunch of files from my repository. These are currently
3197 :			used by other non-SMLNJ backends.
3198 :
3199 :	leunga	576	----------------------------------------------------------------------
3200 :	leunga	590	Name: Allen Leung
3201 :			Date: 2000/03/31 21:15:00 EST
3202 :			Tag: leunga-20000331-aliasing
3203 :			Description:
3204 :
3205 :			This update contains a rewritten (and hopefully more correct) module
3206 :			for extracting aliasing information from CPS.
3207 :
3208 :			To turn on this feature:
3209 :
3210 :			Compiler.Control.CG.memDisambiguate := true
3211 :
3212 :			To pretty print the region information with assembly
3213 :
3214 :			Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
3215 :
3216 :			To control how many levels of aliasing information are printed, use:
3217 :
3218 :			Compiler.Control.MLRISC.getInt "points-to-show-level" := n
3219 :
3220 :			The default of n is 3.
3221 :
3222 :			----------------------------------------------------------------------
3223 :	dbm	589	Name: David MacQueen
3224 :			Date: 2000/03/31 11:15:00 EST
3225 :			Tag: dbm-20000331-runtime_fix
3226 :			Description:
3227 :
3228 :			This update contains:
3229 :
3230 :			1. runtime/c-lib/c-libraries.c
3231 :			includes added in revision 1.2 caused compilation errors on hppa-hpux
3232 :
3233 :			2. fix for bug 1556
3234 :			system/Basis/Implementation/NJ/internal-signals.sml
3235 :
3236 :			----------------------------------------------------------------------
3237 :	blume	587	Name: Matthias Blume
3238 :	blume	588	Date: 2000/03/31 18:00:00 JST
3239 :			Tag: blume_main_v110p26p2_1
3240 :			Description:
3241 :
3242 :			This update contains:
3243 :
3244 :			1. A small change to CM's handling of stable libraries:
3245 :			CM now maintains one "global" modmap that is used for all stable
3246 :			libraries. The use of such a global modmap maximizes sharing and
3247 :			minimizes the need for re-traversing parts of environments during
3248 :			modmap construction. (However, this has minor impact since modmap
3249 :			construction seems to account for just one percent or less of total
3250 :			compile time.)
3251 :
3252 :			2. I added a "genmap" phase to the statistics. This is where I got the
3253 :			"one percent" number (see above).
3254 :
3255 :			3. CM's new tool parameter mechanism just became _even_ better. :)
3256 :			- The parser understands named parameters and recursive options.
3257 :			- The "make" and "shell" tools use these new features.
3258 :			(This makes it a lot easier to cascade these tools.)
3259 :			- There is a small syntax change: named parameters use a
3260 :
3261 :			<name> : ( <option> ... ) or
3262 :			<name> : <string>
3263 :
3264 :			syntax. Previously, named parameters were implemented in an
3265 :			ad-hoc fashion by each tool individually (by parsing strings)
3266 :			and had the form
3267 :
3268 :			<name>=<string>
3269 :
3270 :			See the CM manual for a full description of these issues.
3271 :
3272 :			----------------------------------------------------------------------
3273 :			Name: Matthias Blume
3274 :	blume	587	Date: 2000/03/30 18:00:00 JST
3275 :			Tag: blume_main_v110p26p2_0
3276 :			Description:
3277 :
3278 :			!!!!! WARNING !!!!!!
3279 :			!! New binfiles !!
3280 :			!!!!!!!!!!!!!!!!!!!!
3281 :
3282 :			This update contains:
3283 :
3284 :			1. Moderate changes to CM:
3285 :
3286 :			- Changes to CM's tools mechanism. In particular, it is now possible
3287 :			to have tools that accept additional "command line" parameters
3288 :			(specified in the .cm file at each instance where the tool's class is
3289 :			used).
3290 :
3291 :	monnier	659	This was done to accommodate the new "make" and "shell" tools which
3292 :			facilitate fairly seamless hookup to portions of code managed using
3293 :	blume	587	Makefiles or Shell scripts.
3294 :
3295 :			There are no classes "shared" or "private" anymore. Instead, the
3296 :			sharing annotation is now a parameter to the "sml" class.
3297 :
3298 :			There is a bit of generic machinery for implementing one's own
3299 :			tools that accept command-line parameters. However, I am not yet fully
3300 :			satisfied with that part, so expect changes here in the future.
3301 :
3302 :			All existing tools are described in the CM manual.
3303 :
3304 :	monnier	659	- Slightly better error handling. (CM now suppresses many followup
3305 :	blume	587	error messages that tended to be more annoying than helpful.)
3306 :
3307 :			2. Major changes to the compiler's static environment data structures.
3308 :
3309 :			- no CMStaticEnv anymore.
3310 :			- no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
3311 :			but it is called Environment), no conversions between different
3312 :			kinds of static environments
3313 :
3314 :			- There is still a notion of a "modmap", but such modmaps are generated
3315 :			on demand at the time when they are needed. This sounds slow, but I
3316 :			sped up the code that generates modmaps enough for this not to lead to
3317 :			a slowdown of the compiler (at least I didn't detect any).
3318 :
3319 :			- To facilitate rapid modmap generation, static environments now
3320 :			contain an (optional) "modtree" structure. Modtree annotations are
3321 :			constructed by the unpickler during unpickling. (This means that
3322 :			the elaborator does not have to worry about modtrees at all.)
3323 :			Modtrees have the advantage that they are compositional in the same
3324 :			way as the environment data structure itself is compositional.
3325 :			As a result, modtrees never hang on to parts of an environment that
3326 :			has already been rendered "stale" by filtering or rebinding.
3327 :
3328 :			- I went through many, many trials and errors before arriving at the
3329 :			current solution. (The initial idea of "linkpaths" did not work.)
3330 :			But the result of all this is that I have touched a lot of files that
3331 :			depend on the "modules" and "types" data structures (most of the
3332 :			elaborator). There were a lot of changes during my "linkpath" trials
3333 :			that could have been reverted to their original state but weren't.
3334 :			Please, don't be too harsh on me for messing with this code a bit more
3335 :	monnier	921	than what was strictly necessary... (I _did_ resist the temptation
3336 :	blume	587	of doing any "global reformatting" to avoid an untimely death at
3337 :			Dave's hands. :)
3338 :
3339 :			- One positive aspect of the previous point: At least I made sure that
3340 :			all files that I touched now compile without warnings (other than
3341 :			"polyEqual").
3342 :
3343 :			- compiler now tends to run "leaner" (i.e., ties up less memory in
3344 :			redundant modmaps)
3345 :
3346 :			----------------------------------------------------------------------
3347 :	leunga	580	Name: Allen Leung
3348 :	leunga	585	Date: 2000/03/29 18:00:00
3349 :			Tag: leunga-20000327-mlriscGen_hppa_alpha_x86
3350 :	leunga	586	Boot files (optional): ftp://react-ilp.cs.nyu.edu/leunga/110.26.1-sml.boot.x86-unix-20000330.tar.gz
3351 :	leunga	585	Description:
3352 :
3353 :			This update contains *MAJOR* changes to the way code is generated from CPS
3354 :			in the module mlriscGen, and in various backend modules.
3355 :
3356 :			CHANGES
3357 :			=======
3358 :
3359 :			1. MLRiscGen: forward propagation fix.
3360 :
3361 :			There was a bug in forward propagation introduced at about the same time
3362 :			as the MLRISC x86 backend, which prohibits coalescing to be
3363 :			performed effectively in loops.
3364 :
3365 :			Effect: speed up of loops in RISC architectures.
3366 :			By itself, this actually slowed down certain benchmarks on the x86.
3367 :
3368 :			2. MLRiscGen: forward propagating addresses from consing.
3369 :
3370 :			I've changed the way consing code is generated. Basically I separated
3371 :			out the initialization part:
3372 :
3373 :			store tag, offset(allocptr)
3374 :			store elem1, offset+4(allocptr)
3375 :			store elem2, offset+8(allocptr)
3376 :			...
3377 :			store elemn, offset+4n(allocptr)
3378 :
3379 :			and the address computation part:
3380 :
3381 :			celladdr <- offset+4+alloctpr
3382 :
3383 :			and move the address computation part
3384 :
3385 :			Effect: register pressure is generally lower as a result. This
3386 :			makes compilation of certain expressions much faster, such as
3387 :			long lists with non-trivial elements.
3388 :
3389 :			[(0,0), (0,0), .... (0,0)]
3390 :
3391 :			3. MLRiscGen: base pointer elimination.
3392 :
3393 :			As part of the linkage mechanism, we generate the sequence:
3394 :
3395 :			L: ... <- start of the code fragment
3396 :
3397 :			L1:
3398 :			base pointer <- linkreg - L1 + L
3399 :
3400 :			The base pointer was then used for computing relocatable addresses
3401 :			in the code fragment. Frequently (such as in lots of continuations)
3402 :			this is not needed. We now eliminate this sequence whenever possible.
3403 :
3404 :			For compile time efficiency, I'm using a very stupid local heuristic.
3405 :			But in general, this should be done as a control flow analysis.
3406 :
3407 :			Effect: Smaller code size. Speed up of most programs.
3408 :
3409 :			4. Hppa back end
3410 :
3411 :			Long jumps in span dependence resolution used to depend on the existence
3412 :			of the base pointer.
3413 :
3414 :			A jump to a long label L was expanded into the following sequence:
3415 :
3416 :			LDIL %hi(L-8192), %r29
3417 :			LDO %lo(L-8192)(%r29), %r29
3418 :			ADD %r29, baseptr, %r29
3419 :			BV,n %r0(%r29)
3420 :
3421 :			In the presence of change (3) above, this will not work. I've changed
3422 :			it so that the following sequence of instructions are generated, which
3423 :			doesn't mention the base pointer at all:
3424 :
3425 :			BL,n L', %r29 /* branch and link, L' + 4 -> %r29 */
3426 :			L': ADDIL L-(L'+4), %r29 /* Compute address of L */
3427 :			BV,n %r0(%r29) /* Jump */
3428 :
3429 :			5. Alpha back end
3430 :
3431 :			New alpha instructions LDB/LDW have been added, as per Fermin's
3432 :			suggestions. This is unrelated to all other changes.
3433 :
3434 :			6. X86 back end
3435 :
3436 :			I've changed andl to testl in the floating point test sequence
3437 :			whenever appropriate. The Intel optimization guide states that
3438 :	monnier	659	testl is preferable to andl.
3439 :	leunga	585
3440 :			7. RA (x86 only)
3441 :
3442 :			I've improved the spill propagation algorithm, using an approximation
3443 :			of maximal weighted independent sets. This seems to be necessary to
3444 :			alleviate the negative effect in light of the slow down in (1).
3445 :
3446 :			I'll write down the algorithm one of these days.
3447 :
3448 :			8. MLRiscGen: frequencies
3449 :
3450 :			I've added an annotation that states that all call gc blocks have zero
3451 :			execution frequencies. This improves register allocation on the x86.
3452 :
3453 :			BENCHMARKS
3454 :			==========
3455 :
3456 :			I've only perform the comparison on 110.25.
3457 :
3458 :			The platforms are:
3459 :
3460 :			HPPA A four processor HP machine (E9000) with 5G of memory.
3461 :			X86 A 300Hhz Pentium II with 128M of memory, and
3462 :			SPARC An Ultra sparc 2 with 512M of memory.
3463 :
3464 :			I used the following parameters for the SML benchmarks:
3465 :
3466 :			@SMLalloc
3467 :			HPPA 256k
3468 :			SPARC 512k
3469 :			X86 256k
3470 :
3471 :			COMPILATION TIME
3472 :			----------------
3473 :			Here are the numbers comparing the compilation times of the compilers.
3474 :			I've only compared 110.25 compiling the new sources versus
3475 :			a fixpoint version of the new compiler compiling the same.
3476 :
3477 :			110.25 New
3478 :			Total Time in RA Spill+Reload Total Time In RA Spill+Reload
3479 :			HPPA 627s 116s 2684+3584 599s 95s 1003+1879
3480 :			SPARC 892s 173s 2891+3870 708s 116s 1004+1880
3481 :			X86 999s 315s 94006+130691 987s 296s 108877+141957
3482 :
3483 :			110.25 New
3484 :			Code Size Code Size
3485 :			HPPA 8596736 8561421
3486 :			SPARC 8974299 8785143
3487 :			X86 9029180 8716783
3488 :
3489 :			So in summary, things are at least as good as before. Dramatic
3490 :			reduction in compilation is obtained on the Sparc; I can't explain it,
3491 :			but it is reproducible. Perhaps someone should try to reproduce this
3492 :			on their own machines.
3493 :
3494 :			SML BENCHMARKS
3495 :			--------------
3496 :
3497 :			On the average, all benchmarks perform at least as well as before.
3498 :
3499 :			HPPA Compilation Time Spill+Reload Run Time
3500 :			110.25 New 110.25 New 110.25 New
3501 :
3502 :			barnesHut 3.158 3.015 4.75% 1+1 0+0 2.980 2.922 2.00%
3503 :			boyer 6.152 5.708 7.77% 0+0 0+0 0.218 0.213 2.34%
3504 :			count-graphs 1.168 1.120 4.32% 0+0 0+0 22.705 23.073 -1.60%
3505 :			fft 0.877 0.792 10.74% 1+3 1+3 0.602 0.587 2.56%
3506 :			knuthBendix 3.180 2.857 11.32% 0+0 0+0 0.675 0.662 2.02%
3507 :			lexgen 6.190 5.290 17.01% 0+0 0+0 0.913 0.788 15.86%
3508 :			life 0.803 0.703 14.22% 25+25 0+0 0.153 0.140 9.52%
3509 :			logic 2.048 2.007 2.08% 6+6 1+1 4.133 4.008 3.12%
3510 :			mandelbrot 0.077 0.080 -4.17% 0+0 0+0 0.765 0.712 7.49%
3511 :			mlyacc 22.932 20.937 9.53% 154+181 32+57 0.468 0.430 8.91%
3512 :			nucleic 5.183 5.060 2.44% 2+2 0+0 0.125 0.120 4.17%
3513 :			ratio-regions 3.357 3.142 6.84% 0+0 0+0 116.225 113.173 2.70%
3514 :			ray 1.283 1.290 -0.52% 0+0 0+0 2.887 2.855 1.11%
3515 :			simple 6.307 6.032 4.56% 28+30 5+7 3.705 3.658 1.28%
3516 :			tsp 0.888 0.862 3.09% 0+0 0+0 7.040 6.893 2.13%
3517 :			vliw 24.378 23.455 3.94% 106+127 25+45 2.758 2.707 1.91%
3518 :			--------------------------------------------------------------------------
3519 :			Average 6.12% 4.09%
3520 :
3521 :			SPARC Compilation Time Spill+Reload Run Time
3522 :			110.25 New 110.25 New 110.25 New
3523 :
3524 :			barnesHut 3.778 3.592 5.20% 2+2 0+0 3.648 3.453 5.65%
3525 :			boyer 6.632 6.110 8.54% 0+0 0+0 0.258 0.242 6.90%
3526 :			count-graphs 1.435 1.325 8.30% 0+0 0+0 33.672 34.737 -3.07%
3527 :			fft 0.980 0.940 4.26% 3+9 2+6 0.838 0.827 1.41%
3528 :			knuthBendix 3.590 3.138 14.39% 0+0 0+0 0.962 0.967 -0.52%
3529 :			lexgen 6.593 6.072 8.59% 1+1 0+0 1.077 1.078 -0.15%
3530 :			life 0.972 0.868 11.90% 26+26 0+0 0.143 0.140 2.38%
3531 :			logic 2.525 2.387 5.80% 7+7 1+1 5.625 5.158 9.05%
3532 :			mandelbrot 0.090 0.093 -3.57% 0+0 0+0 0.855 0.728 17.39%
3533 :			mlyacc 26.732 23.827 12.19% 162+189 32+57 0.550 0.560 -1.79%
3534 :			nucleic 6.233 6.197 0.59% 3+3 0+0 0.163 0.173 -5.77%
3535 :			ratio-regions 3.780 3.507 7.79% 0+0 0+0 133.993 131.035 2.26%
3536 :			ray 1.595 1.550 2.90% 1+1 0+0 3.440 3.418 0.63%
3537 :			simple 6.972 6.487 7.48% 29+32 5+7 3.523 3.525 -0.05%
3538 :			tsp 1.115 1.063 4.86% 0+0 0+0 7.393 7.265 1.77%
3539 :			vliw 27.765 24.818 11.87% 110+135 25+45 2.265 2.135 6.09%
3540 :			----------------------------------------------------------------------------
3541 :			Average 6.94% 2.64%
3542 :
3543 :			X86 Compilation Time Spill+Reload Run Time
3544 :			110.25 New 110.25 New 110.25 New
3545 :
3546 :			barnesHut 5.530 5.420 2.03% 593+893 597+915 3.532 3.440 2.66%
3547 :			boyer 8.768 7.747 13.19% 493+199 301+289 0.327 0.297 10.11%
3548 :			count-graphs 2.040 2.010 1.49% 298+394 315+457 26.578 28.660 -7.26%
3549 :			fft 1.327 1.302 1.92% 112+209 115+210 1.055 0.962 9.71%
3550 :			knuthBendix 5.218 5.475 -4.69% 451+598 510+650 0.928 0.932 -0.36%
3551 :			lexgen 9.970 9.623 3.60% 1014+841 1157+885 0.947 0.928 1.97%
3552 :			life 1.183 1.183 0.00% 162+182 145+148 0.127 0.103 22.58%
3553 :			logic 3.285 3.512 -6.45% 514+684 591+836 5.682 5.577 1.88%
3554 :			mandelbrot 0.147 0.143 2.33% 38+41 33+54 0.703 0.690 1.93%
3555 :			mlyacc 35.457 32.763 8.22% 3496+4564 3611+4860 0.552 0.550 0.30%
3556 :			nucleic 7.100 6.888 3.07% 239+168 201+158 0.175 0.173 0.96%
3557 :			ratio-regions 6.388 6.843 -6.65% 1182+257 981+300 120.142 120.345 -0.17%
3558 :			ray 2.332 2.338 -0.29% 346+398 402+494 3.593 3.540 1.51%
3559 :			simple 9.912 9.903 0.08% 1475+941 1579+1168 3.057 3.178 -3.83%
3560 :			tsp 1.623 1.532 5.98% 266+200 250+211 8.045 7.878 2.12%
3561 :			vliw 33.947 35.470 -4.29% 2629+2774 2877+3171 2.072 1.890 9.61%
3562 :			----------------------------------------------------------------------------
3563 :			Average 1.22% 3.36%
3564 :
3565 :			----------------------------------------------------------------------
3566 :			Name: Allen Leung
3567 :	leunga	583	Date: 2000/03/23 16:25:00
3568 :			Tag: leunga-20000323-fix_x86_alpha
3569 :			Description:
3570 :
3571 :			1. X86 fixes/changes
3572 :
3573 :			a. The old code generated for SETcc was completely wrong.
3574 :			The Intel optimization guide is VERY misleading.
3575 :
3576 :			2. ALPHA fixes/changes
3577 :
3578 :			a. Added the instructions LDBU, LDWU, STB, STW as per Fermin's suggestion.
3579 :			b. Added a new mode byteWordLoadStores to the functor parameter to Alpha()
3580 :			c. Added reassociation code for address computation.
3581 :
3582 :			----------------------------------------------------------------------
3583 :			Name: Allen Leung
3584 :	leunga	580	Date: 2000/03/22 01:23:00
3585 :			Tag: leunga-20000322-fix_x86_hppa_ra
3586 :			Description:
3587 :
3588 :			1. X86 fixes/changes
3589 :
3590 :			a. x86Rewrite bug with MUL3 (found by Lal)
3591 :			b. Added the instructions FSTS, FSTL
3592 :
3593 :			2. PA-RISC fixes/changes
3594 :
3595 :			a. B label should not be a delay slot candidate! Why did this work?
3596 :			b. ADDT(32, REG(32, r), LI n) now generates one instruction instead of two,
3597 :			as it should be.
3598 :			c. The assembly syntax for fstds and fstdd was wrong.
3599 :			d. Added the composite instruction COMICLR/LDO, which is the immediate
3600 :			operand variant of COMCLR/LDO.
3601 :
3602 :			3. Generic MLRISC
3603 :
3604 :			a. shuffle.sml rewritten to be slightly more efficient
3605 :			b. DIV bug in mltree-simplify fixed (found by Fermin)
3606 :
3607 :			4. Register Allocator
3608 :
3609 :			a. I now release the interference graph earlier during spilling.
3610 :			May improve memory usage.
3611 :
3612 :			----------------------------------------------------------------------
3613 :	blume	577	Name: Matthias Blume
3614 :	blume	578	Date: 2000/03/14 14:15:32
3615 :			Tag: blume_main_v110p26p1_2
3616 :			Description:
3617 :
3618 :			1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3619 :			additional argument called "template" which is an optional string that
3620 :	monnier	659	specifies the layout of the tool command line. See the CM manual for
3621 :	blume	578	explanation.
3622 :
3623 :	monnier	659	2. A special-purpose tool can be "registered" by simply dropping the
3624 :	blume	578	corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3625 :			directory where the .cm file lives that uses this tool. (The
3626 :			behavior/misfeature until now was to look for the tool description
3627 :			files in the current working directory.) As before, tool description
3628 :			files could also be anchored -- in which case they can live anywhere
3629 :			they like. Following the recent e-mail discussion, this change should
3630 :			make it easier to have special-purpose tools that are shipped together
3631 :			with the sources of the program that uses them.
3632 :
3633 :			----------------------------------------------------------------------
3634 :			Name: Matthias Blume
3635 :	blume	577	Date: 2000/03/10 07:48:34
3636 :			Tag: blume_main_v110p26p1_1
3637 :			Description:
3638 :
3639 :			I added a re-written version of Dave's fixpt script to src/system.
3640 :			Changes relative to the original version:
3641 :			- sh-ified (not everybody has ksh)
3642 :			- automatically figures out which architecture it runs on
3643 :			- uses ./makeml a bit more cleverly
3644 :			- never invokes ./installml (and, thus, does not clobber your
3645 :			good and working installation of sml in case something goes wrong)
3646 :			- accepts max iteration count using option "-iter <n>"
3647 :			- accepts a "base" name using option "-base <base>"
3648 :
3649 :			It does not build any extraneous heap images but directly rebuilds
3650 :			bin- and boot-hierarchies using makeml's "-rebuild" switch. Finally,
3651 :			it can incorporate existing bin- and boot- hierarchies. For example,
3652 :			suppose the base is set to "sml" (which is the default). Then it
3653 :			successively builds
3654 :
3655 :			sml.bin.<arch>-unix and sml.boot.<arch>-unix
3656 :			then sml1.bin.<arch>-unix and sml1.boot.<arch>-unix
3657 :			then sml2.bin.<arch>-unix and sml2.boot.<arch>-unix
3658 :			...
3659 :			then sml<n>.bin.<arch>-unix and sml<n>.boot.<arch>-unix
3660 :
3661 :			and so on. If any of these already exist, it will just use what's
3662 :			there. In particular, many people will have the initial set of bin
3663 :			and boot files around, so this saves time for at least one full
3664 :			rebuild. Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
3665 :			<k>=1,2,... is normally not a good idea when invoking fixpt. However,
3666 :			they might be the result of an earlier partial run of fixpt (which
3667 :	monnier	659	perhaps got accidentally killed). In this case, fixpt will quickly
3668 :	blume	577	move through what exists before continuing where it left off earlier,
3669 :			and, thus, saves a lot of time.
3670 :
3671 :			----------------------------------------------------------------------
3672 :	leunga	576	Name: Allen Leung
3673 :			Date: 00/03/10 02:20:00
3674 :			Tag: leunga-20000310-fix_x86_asm_ra
3675 :			Description:
3676 :	dbm	570
3677 :	leunga	576	More assembly output problems involving the indexed addressing mode
3678 :			on the x86 have been found and corrected. Thanks to Fermin Reig for the
3679 :			fix.
3680 :
3681 :			The interface and implementation of the register allocator have been changed
3682 :			slightly to accommodate the possibility to skip the register allocation
3683 :			phases completely and go directly to memory allocation. This is needed
3684 :			for C-- use.
3685 :
3686 :	dbm	570	----------------------------------------------------------------------
3687 :	blume	572	Name: Matthias Blume
3688 :	blume	575	Date: 00/03/09 10:23:53
3689 :			Tag: blume_main_v110p26p1_0
3690 :			Description:
3691 :
3692 :			* Complete re-organization of library names. Many libraries have been
3693 :			consolidated so that they share the same path anchor. For example,
3694 :			all MLRISC-related libraries are anchored at MLRISC, most libraries that
3695 :			are SML/NJ-specific are under "smlnj". Notice that names like
3696 :			host-cmb.cm or host-compiler.cm no longer exist. See system/README
3697 :			for a complete description of the new naming scheme. Quick reference:
3698 :
3699 :			host-cmb.cm -> smlnj/cmb.cm
3700 :			host-compiler.cm -> smlnj/compiler.cm
3701 :			full-cm.cm -> smlnj/cm.cm
3702 :			<arch>-<os>.cm -> smlnj/cmb/<arch>-<os>.cm
3703 :			<arch>-compiler.cm -> smlnj/compiler/<arch>.cm
3704 :
3705 :			* Bug fixes in CM.
3706 :			- exceptions in user code are being passed through (i.e., reach top level)
3707 :			- more bugs in paranoia mode fixed
3708 :			- bug related to checking group owners fixed
3709 :
3710 :			* New install.sh script that automagically fetches archive files:
3711 :			The new file config/srcarchiveurl must contain the URL of the
3712 :			(remote) directory that contains bin files (or other source archives).
3713 :			If install.sh does not find the archive locally, it tries to get
3714 :			it from that remote directory.
3715 :			This should simplify installation further: For machines that have
3716 :			access to the internet, just fetch <version>-config.tgz, unpack it,
3717 :	monnier	659	edit config/targets, and go (run config/install.sh). The script will
3718 :	blume	575	fetch everything else that it might need all by itself.
3719 :
3720 :			For CVS users, this mechanism is not relevant for source archives, but
3721 :			it is convenient for getting new sets of binfiles.
3722 :
3723 :			Archives should be tar files compressed with either gzip, compress, or
3724 :			bzip2. The script recognizes .tgz, .tar, tar.gz, tz, .tar.Z, and .tar.bz2.
3725 :
3726 :			----------------------------------------------------------------------
3727 :			Name: Matthias Blume
3728 :	blume	572	Date: 2000/03/07 04:01:04
3729 :			Tag: blume_main_v110_26_2
3730 :	dbm	570	Description:
3731 :	blume	572	- size info in BOOTLIST
3732 :			* no fixed upper limits for number of bootfiles or length of
3733 :			bootfile names in runtime
3734 :			* falling back to old behavior if no BOOTLIST size info found
3735 :			- allocation size heuristics in .run-sml
3736 :			* tries to read cache size from /proc/cpuinfo (this is important for
3737 :			small-cache Celeron systems!)
3738 :			- install.sh robustified
3739 :			- CM manual updates
3740 :			- paranoid mode
3741 :			* no more CMB.deliver() (i.e., all done by CMB.make())
3742 :			* can re-use existing sml.boot.* files
3743 :			* init.cmi now treated as library
3744 :			* library stamps for consistency checks
3745 :			- sml.boot.<arch>-<os>/PIDMAP file
3746 :			* This file is read by the CM startup code. This is used to minimize
3747 :			the amount of dynamic state that needs to be stowed away for the
3748 :			purpose of sharing between interactive system and user code.
3749 :			- CM.Anchor.anchor instead of CM.Anchor.{set,cancel}
3750 :			* Upon request by Elsa. Anchors now controlled by get-set-pair
3751 :			like most other CM state variables.
3752 :			- Compiler.CMSA eliminated
3753 :			* No longer supported by CM anyway.
3754 :			- fixed bugs in pickler that kept biting Stefan
3755 :			* past refs to past refs (was caused by the possibility that
3756 :			ad-hoc sharing is more discriminating than hash-cons sharing)
3757 :			* integer overflow on LargeInt.minInt
3758 :			- ml-{lex,yacc} build scripts now use new mechanism
3759 :			for building standalone programs
3760 :			- fixed several gcc -Wall warnings that were caused by missing header
3761 :			files, missing initializations, etc., in runtime (not all warnings
3762 :			eliminated, though)

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