Diff of /sml/trunk/HISTORY

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	revision 644, Fri May 12 09:18:31 2000 UTC	revision 777, Fri Jan 12 12:17:38 2001 UTC
#	Line 13	Line 13
13	Description:	Description:
14	----------------------------------------------------------------------	----------------------------------------------------------------------
15	Name: Matthias Blume	Name: Matthias Blume
16		Date: 2001/01/12 21:20:00 JST
17		Tag: blume-20010112-sync
18		Description:
19
20		I am just flushing out some minor changes that had accumulated in
21		my private branch in order to sync with the main tree.  (This is
22		mainly because I had CVS trouble when trying to merge _into_ my
23		private branch.)
24
25		Most people should be completely unaffected by this.
26
27		----------------------------------------------------------------------
28		Name: Allen Leung
29		Date: Thu Jan 11 21:03:00 EST 2001
30		Tag: leunga-20010111-labexp=mltree
31		Description:
32
33		1.  Removed the type LabelExp and replace it by MLTree.
34		2.  Rewritten mltree-simplify with the pattern matcher tool.
35		3.  There were some bugs in alpha code generator which would break
36		64-bit code generation.
37		4.  Redo the tools to generate code with the
38		5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
39		are now generated by perl scripts.
40
41		----------------------------------------------------------------------
42		Name: Matthias Blume
43		Date: 2001/01/10 21:55:00 JST
44		Tag: blume-20010110-rcc
45		Description:
46
47		The RCC stuff now seems to work (but only on the x86).
48		This required hacking of the c-calls interface (and -implementation) in
49		MLRISC.
50
51		Normal compiler users should be unaffected.
52
53		----------------------------------------------------------------------
54		Name: Matthias Blume
55		Date: 2001/01/09 01:20:00 JST
56		Tag: blume-20010109-rcc
57		Description:
58
59		This is a fairly big patch, flushing out a large number of pending
60		changes that I made to my development copy over the last couple of days.
61
62		Of practical relevance at this moment is a workaround for a pickling
63		bug that Allen ran into the other day.  The cause of the bug itself is
64		still unknown and it might be hard to fix it properly, but the
65		workaround has some merits of its own (namely somewhat reducing pickling
66		overhead for certain libraries).  Therefore, I think this solution should
67		be satisfactory at this time.
68
69		The rest of the changes (i.e., the vast majority) has to do with my
70		ongoing efforts of providing direct support for C function calls from
71		ML.  At the moment there is a new primop "RAW_CCALL", typing magic
72		in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
73		case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
74		translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
75		handle RCC.
76
77		The last part (the changes to mlriscGen.sml) are still known to be
78		wrong on the x86 and not implemented on all other architectures.  But
79		the infrastructure is in place. I had to change a few functor
80		signatures in the backend to be able to route the CCalls interface
81		from MLRISC there, and I had to specialize the mltree type (on the
82		x86) to include the necessary extensions. (The extensions themselves
83		were already there and redy to go in MLRISC/x86).
84
85		Everything should be very happy as soon as someone helps me with
86		mlriscGen.sml...
87
88		In any case, nothing of this should matter to anyone as long as the
89		new primop is not being used (which is going to be the case unless you
90		find it where I hid it :). The rest of the compiler is completely
91		unaffected.
92
93		----------------------------------------------------------------------
94		Name: Matthias Blume
95		Date: 2001/01/05 00:30:00 JST
96		Tag: blume-20010105-primops
97		Description:
98
99		Added some experimental support for work that I am doing right now.
100		These changes mostly concern added primops, but there is also a new
101		experimental C library in the runtime system (but currently not enabled
102		anywhere except on Linux/X86).
103
104		In the course of adding primops (and playing with them), I discovered that
105		Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
106		broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
107		To recover, I made type information in INL_PRIM mandatory and changed
108		prim.sml as well as built-in.sml accordingly.  The InLine structure now
109		has complete, correct type information (i.e., no bottom types).
110
111		Since all these changes mean that we need new binfiles, I also bumped the
112		version number to 110.32.1.
113
114		----------------------------------------------------------------------
115		Name: Matthias Blume
116		Date: 2000/12/30 22:10:00 JST
117		Tag: blume-20001230-various
118		Description:
119
120		Added proxy libraries for MLRISC and let MLRISC libraries refer
121		to each other using path anchors.  (See CM manual for explanation.)
122
123		Updated CM documentation.
124
125		Fixed some bugs in CM.
126
127		Implemented "proxy" libraries (= syntactic sugar for CM).
128
129		Added "-quiet" option to makeml and changed runtime system accordingly.
130
131		Added cleanup handler for exportML to reset timers and compiler stats.
132
133		----------------------------------------------------------------------
134		Name: Lal George
135		Date: 2000/12/22 22:22:58 EST 2000
136		Tag: Release_110_32
137		Description:
138
139		Infinite precision used throughout MLRISC.
140		see MLRISC/mltree/machine-int.sig
141
142		----------------------------------------------------------------------
143		Name: Matthias Blume
144		Date: 2000/12/22 23:16:00 JST
145		Tag: blume-20001222-warn
146		Description:
147
148		Corrected wording and formatting of some CM warning message which I
149		broke in my previous patch.
150
151		----------------------------------------------------------------------
152		Name: Matthias Blume
153		Date: 2000/12/22 21:20:00 JST
154		Tag: blume-20001222-anchorenv
155		Description:
156
157		Fixed CM's handling of anchor environments in connection with CMB.make.
158
159		----------------------------------------------------------------------
160		Name: Matthias Blume
161		Date: 2000/12/22 13:15:00 JST
162		Tag: blume-20001222-cleanup
163		Description:
164
165		Removed src/cm/ffi which does not (and did not) belong here.
166
167		----------------------------------------------------------------------
168		Name: Matthias Blume
169		Date: 2000/12/21 23:55:00 JST
170		Tag: blume-20001221-exn
171		Description:
172
173		Probably most important: CM no longer silently swallows all exceptions
174		in the compiler.
175		Plus: some other minor CM changes.  For example, CM now reports some
176		sizes for generated binfiles (code, data, envpickle, lambdapickle).
177
178		----------------------------------------------------------------------
179		Name: Matthias Blume
180		Date: 2000/12/15 00:01:05 JST
181		Tag: blume-20001215-dirtool
182		Description:
183
184		- "dir" tool added.
185		- improvements and cleanup to Tools structure
186		- documentation updates
187
188		----------------------------------------------------------------------
189		Name: Allen Leung
190		Date: Thu Dec 14 03:45:24 EST 2000
191		Description:
192		Tag:  leunga-20001214-int-inf
193		Description:
194
195		In IntInf, added these standard functions, which are missing from our
196		implementation:
197
198		andb : int * int -> int
199		xorb : int * int -> int
200		orb  : int * int -> int
201		notb : int -> int
202		<<   : int * word -> int
203		~>>  : int * word -> int
204
205		Not tested, I hope they are correct.
206
207		----------------------------------------------------------------------
208		Name: Allen Leung
209		Date: Fri Dec  8 19:23:26 EST 2000
210		Description:
211		Tag:  leunga-20001208-nowhere
212		Description:
213
214		Slight improvements to the 'nowhere' tool to handle OR-patterns,
215		to generate better error messages etc.  Plus a brief manual.
216
217		----------------------------------------------------------------------
218		Name: Lal George
219		Date: 2000/12/08 09:54:02 EST 2000
220		Tag: Release_110_31
221		Description:
222
223		- Version 110.31
224		----------------------------------------------------------------------
225		Name: Allen Leung
226		Date: Thu Dec  7 22:01:04 EST 2000
227		Tag:  leunga-20001207-cell-monster-hack
228		Description:
229
230		Major MLRISC internal changes.  Affect all clients.
231		Summary:
232
233		1.  Type CELLS.cell = int is now replaced by a datatype.
234		As a result, the old regmap is now gone.  Almost all interfaces
235		in MLRISC change as a consequence.
236
237		2.  A new brand version of machine description tool (v3.0) that generates
238		modules expecting the new interface.  The old version is removed.
239
240		3.  The RA interface has been further abstracted into two new functors.
241		RISC_RA and X86RA.  These functors have much simpler interfaces.
242		[See also directory MLRISC/demo.]
243
244		4.  Some other new source->source code generation tools are available:
245
246		a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
247		b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
248		I use this tool to generate the peephole optimizers---with the new
249		cell type changes, peephole rules are becoming difficult to write
250		without conditional pattern matching.
251
252		5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
253		cover the entire MLRISC source tree so many things broke.
254
255		6.  CM files have been moved to the subdirectory MLRISC/cm.
256		They are moved because there are a lot of them and they clutter up the
257		root dir.
258
259		7.  More detailed documentation to come...
260
261		NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
262		a makeml -rebuild first.  This is because of other other
263		changes that Matthias has made (see below).
264
265
266		----------------------------------------------------------------------
267		Name: Matthias Blume
268		Date: 2000/11/30 23:12:00 JST
269		Tag: blume-20001130-filereorg
270		Description:
271
272		Some manual updates and some file reorganizations in CM.
273
274		----------------------------------------------------------------------
275		Name: Matthias Blume
276		Date: 2000/11/24 17:45:00 JST
277		Tag: blume-20001124-link
278		Description:
279
280		Drastically improved link traversal code for the case that the dynamic
281		value was already loaded at bootstrap time.  As a result, CM and CMB
282		now both load blazingly fast -- even on a very slow machine.  Also,
283		memory consumption has been further reduced by this.
284
285		Warning: The format of the PIDMAP file has changed.  THerefore, to
286		bootstrap you have to do this:
287
288		1. Run CMB.make
289		2. Make a symbolic link for the boot directory:
290		ln -s sml.boot.ARCH-OS xxx
291		3. "Rebuild" the boot directory:
292		./makeml -boot xxx -rebuild sml ; rm xxx
293		4. Boot normally:
294		./makeml
295
296		----------------------------------------------------------------------
297		Name: Matthias Blume
298		Date: 2000/11/21 21:20:00 JST
299		Tag: blume-20001121-tools
300		Description:
301
302		Continued hacking on autoloading problem -- with success this time.
303		Also changed tool-plugin mechanism.  See new CM manual.
304
305		----------------------------------------------------------------------
306		Name: Matthias Blume
307		Date: 2000/11/19 14:30:00 JST
308		Tag:  blume-20001119-autoload
309		Description:
310
311		Some hacking to make autoloading faster.  Success for CMB, no success
312		so far for CM.  There is a reduced structure CM' that autoloads faster.
313		(This is a temporary, non-documented hack to be eliminated again when
314		the general problem is solved.)
315
316		----------------------------------------------------------------------
317		Name: Matthias Blume
318		Date: 2000/11/17 14:10:00 JST
319		Tag: blume-20001117-pickle-lib
320		Description:
321
322		1. Eliminated comp-lib.cm
323		2. Made pickle-lib.cm
324		3. Eliminated all uses of intset.sml (from comp-lib.cm)
325		4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
326		equivalent constructs from smlnj-lib.cm (INtHashTable).
327		5. Point 4. also goes for those uses of intmap.* in MLRISC.
328		Duplicated intmap modules thrown out.
329		6. Hunted down all duplicated SCC code and replaced it with
330		equivalent stuff (GraphSCCFn from smlnj-lib.cm).
331		7. Rewrote Feedback module.
332		8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
333		should be thrown out and equivalent modules from smlnj-lib.cm
334		should be used (IntRedBlackSet, IntListSet, ...).
335
336		Confirmed that compiler compiles to fixpoint.
337
338		----------------------------------------------------------------------
339		Name: Allen Leung
340		Date: 2000/11/10 18:00:00
341		Tag: leunga-20001110-new-x86-fp
342
343		A new x86 floating point code generator has been added.
344		By default this is turned off.  To turn this on, do:
345
346		CM.autoload "$smlnj/compiler.cm";
347		Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
348
349		Changes:
350
351		1.  Changed FTAN to FPTAN so that the assembly output is correct.
352		2.  Changed the extension callback for FTANGENT to generate:
353
354		fptan
355		fstp  %st(0)
356		instead of
357		fptan
358		fstpl ftempmem
359
360		3.  Numerous assembly fixes for x86.
361
362		5.  Cleaned up the machine code output module x86/x86MC.sml and added
363		support for a whole bunch of instructions and addressing modes:
364
365		fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
366		faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
367		fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
368		fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
369		fxch %st(n)
370		fld %st(n)
371		fst %st(n)
372		fst mem
373		fstp %st(n)
374		fucom %st(n)
375		fucomp %st(n)
376
377		All these are now generated when the fast fp mode is turned on.
378
379		6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
380
381		----------------------------------------------------------------------
382		Name: Matthias Blume
383		Date: 2000/11/09 11:20:00 JST
384		Tag: blume-20001109-scc
385		Description:
386
387		Eliminated some code duplication:
388
389		1. Added "where" clause to GraphSCCFn in SML/NJ Library.
390		(Otherwise the functor is useless.)
391		2. Used GraphSCCFn where SCCUtilFun was used previously.
392		3. Got rid of SCCUtilFun (in comp-lib.cm).
393
394		----------------------------------------------------------------------
395		Name: Lal George
396		Date: 2000/11/06 09:02:21 EST 2000
397		Tag: Release_110_30
398		Description:
399
400		- Version 110.30
401		----------------------------------------------------------------------
402		Name: Matthias Blume
403		Date: 2000/11/04 14:45:00
404		Tag: blume-20001104-mlbuild
405		Description:
406
407		- Made ml-build faster on startup.
408		- Documentation fixes.
409
410		----------------------------------------------------------------------
411		Name: Matthias Blume
412		Date: 2000/11/02 17:00:00 JST
413		Tag: blume-20001102-condcomp
414		Description:
415
416		- Small tweaks to pickler -- new BOOTFILES!
417		- Version bumped to 110.29.2.
418		- Added conditional compilation facility to init.cmi (see comment there).
419		----------------------------------------------------------------------
420		Name: Allen Leung
421		Date: 2000/10/23 19:31:00
422		Tag: leunga-20001023-demo-ra
423
424		1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
425		2. Test programs for the graph library updated
426		3. Some new MLRISC demo programs added
427
428		----------------------------------------------------------------------
429		Name: Matthias Blume
430		Date: 2000/08/31 22:15:00 JST
431		Tag: blume-20001017-errmsg
432		Description:
433
434		More error message grief: Where there used to be no messages, there
435		now were some that had bogus error regions.  Fixed.
436
437		----------------------------------------------------------------------
438		Name: Matthias Blume
439		Date: 2000/08/31 17:30:00 JST
440		Tag: blume-20001017-v110p29p1
441		Description:
442
443		I made a version 110.29.1 with new bootfiles.
444
445		Changes:  Modified pickler/unpickler for faster and leaner unpickling.
446		CM documentation changes and a small bugfix in CM's error reporting.
447
448		----------------------------------------------------------------------
449		Name: Lal George
450		Date: 2000/09/27 14:42:35 EDT
451		Tag: george-20000927-nodestatus
452		Description:
453
454		Changed the type of the nodestatus, so that:
455
456		SPILLED(~1)             is now SPILLED
457		SPILLED(m) where m>=0   is now MEMREG(m)
458		SPILLED(s) where s<~1   is now SPILL_LOC(~s)
459
460		----------------------------------------------------------------------
461		Name: Matthias Blume
462		Date: 2000/09/07 14:45:00 JST
463		Tag: blume-20000907-cmerrmsg
464		Description:
465
466		Small tweak to CM to avoid getting ML syntax error messages twice.
467
468		----------------------------------------------------------------------
469		Name: Matthias Blume
470		Date: 2000/08/31 18:00:00 JST
471		Tag: blume-20000831-cvsbootfiles
472		Description:
473
474		New URL for boot files (because the 110.29 files on the BL server do
475		now work correctly with my updated install scripts for yacc and lex).
476
477		----------------------------------------------------------------------
478		Name: Matthias Blume
479		Date: 2000/08/08 12:33:00 JST
480		Tag: blume-20000808-manual
481		Description:
482
483		Tiny update to CM manual.
484
485		----------------------------------------------------------------------
486		Name: Allen Leung
487		Date: 2000/08/7 19:31:00
488		Tag: leunga-20000807-a-whole-bunch-of-stuff
489
490		Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
491		and Mobdy.
492
493		1.  x86
494
495		a.  Fixes to peephole module by John and Dan.
496		b.  Assembly fix to SETcc by Allen.
497		c.  Fix to c-call by John.
498		d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
499		e.  Instruction selection optimization to SETcc as suggested by John.
500
501		For example,
502
503		MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
504
505		should generate:
506
507		MOVL a, x
508		SUBL b, x
509		SHRL 31, x
510
511		2.  IR stuff
512
513		A bunch of new DJ-graph related algorithms added.  These
514		speed up SSA construction.
515
516		3.  SSA + Scheduling
517
518		Added code for SSA and scheduling to the repository
519
520		----------------------------------------------------------------------
521		Name: Lal George
522		Date: 2000/07/27 11:53:14 EDT
523
524		Tag: lal-20000727-linux-ppc
525		Description:
526
527		Made changes to support Linux PPC.
528		p.s. I have confirmation that the 110.29 boot files work fine.
529
530		----------------------------------------------------------------------
531		Name: Matthias Blume
532		Date: 2000/07/27 17:40:00 JST
533		Tag: blume-20000727-scripts
534		Description:
535
536		!!!! WARNING !!!!
537		You must recompile the runtime system!
538		!!!! WARNING !!!!
539
540		This is basically another round of script-enhancements:
541
542		1. sml, ml-build, and ml-makedepend accept options -D and -U to define
543		and undefine CM preprocessor symbols.
544
545		2. ml-build avoids generating a new heap image if it finds that the
546		existing one is still ok.  (The condition is that no ML file had to
547		be recompiled and all ML files are found to be older that the heap
548		file.)
549
550		To make this work smoothly, I also hacked the runtime system as
551		well as SMLofNJ.SysInfo to get access to the heap image suffix
552		(.sparc-solaris, ...) that is currently being used.
553
554		Moreover, the signature of CM.mk_standalone has changed.  See the
555		CM manual.
556
557		3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
558		CM manual for details.)
559
560		4. More CM manual updates:
561		- all of the above has been documented.
562		- there is now a section describing the (CM-related) command line
563		arguments that are accepted by the "sml" command
564
565		----------------------------------------------------------------------
566		Name: Matthias Blume
567		Date: 2000/07/25 16:20:00 JST
568		Tag: blume-20000725-makedepend
569		Description:
570
571		Added a script called ml-makedepend.  This can be used in makefiles
572		for Unix' make in a way very similar to the "makedepend" command for
573		C.
574
575		The script internally uses function CM.sources.
576
577		Synopsis:
578
579		ml-makedepend [-f makefile] cmfile targetname
580
581		The default for the makefile is "makefile" (or "Makefile" should
582		"makefile" not exist).
583
584		ml-makedepend adds a cmfile/targetname-specific section to this
585		makefile (after removing the previous version of this section).  The
586		section contains a single dependency specification with targetname on
587		the LHS (targetname is an arbitrary name), and a list of files derived
588		from the cmfile on the RHS.  Some of the files on the RHS are
589		ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
590		"make" variables $(ARCH) and $(OPSYS) in place of the corresponding
591		path names.  The makefile writer is responsible for making sure that
592		these variables have correct at the time "make" is invoked.
593
594		----------------------------------------------------------------------
595		Name: Matthias Blume
596		Date: 2000/07/22 23:30:00 JST
597		Tag: blume-20000722-urlupdate
598		Description:
599
600		Changed BOOT and config/srcarchiveurl to point to BL server:
601
602		ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
603
604		----------------------------------------------------------------------
605		Name: Matthias Blume
606		Date: 2000/07/18 18:00:00 JST
607		Tag: blume-20000718-Version_110_29
608		Description:
609
610		1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
611
612		2. Updated config/version to 110.29
613
614		3. Updated config/srcarchiveurl
615
616		3. New boot files!
617		ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
618
619		----------------------------------------------------------------------
620		Name: Matthias Blume
621		Date: 2000/07/11 13:58:00 JST
622		Tag: blume-20000711-doctypo
623		Description:
624
625		Fixed a few typos in CM manual.
626
627		----------------------------------------------------------------------
628		Name: Allen Leung
629		Date: 2000/06/15 00:38:00
630		Tag: leunga-20000704-sparc-x86
631
632		1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
633		2. fix to x86 RET bug [found by Dan Grossman]
634		3. sparc assembly bug fix for ticc instructions [found by Fermin]
635
636		Affects c-- and moby only
637
638		----------------------------------------------------------------------
639		Name: Matthias Blume
640		Date: 2000/07/04 15:26:00
641		Tag: blume-20000704-trigger
642		Description:
643
644		1. Improvements to CM manual.
645		2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
646		of getting a back-trace.  The function, when called, raises an
647		internal exception which explicitly carries the full back-trace history,
648		so it is unaffected by any intervening handle-raise pairs ("trivial"
649		or not).  The interactive loop will print that history once it arrives
650		at top level.
651		Short of having all exceptions implicitly carry the full history, the
652		recommended way of using this facility is:
653		- compile your program with instrumentation "on"
654		- run it, when it raises an exception, look at the history
655		- if the history is "cut off" because of some handler, go and modify
656		your program so that it explicitly calls BTrace.trigger
657		- recompile (still instrumented), and rerun; look at the full history
658
659		----------------------------------------------------------------------
660		Name: Matthias Blume
661		Date: 2000/07/03 15:36:00 JST
662		Tag: blume-20000702-manual
663		Description:
664
665		Small corrections and updates to CM manual.
666
667		----------------------------------------------------------------------
668		Name: Matthias Blume
669		Date: 2000/06/29 16:04:00 JST
670		Tag: blume-20000629-yacctool
671		Description:
672
673		Changes:
674
675		1. Class "mlyacc" now takes separate arguments to pass options to
676		generated .sml- and .sig-files independently.
677		2. Corresponding CM manual updates.
678		3. BTrace module now also reports call sites.  (However, for loop clusters
679		it only shows from where the cluster was entered.)  There are associated
680		modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
681
682		----------------------------------------------------------------------
683		Name: Matthias Blume
684		Date: 2000/06/27 16:51:00 JST
685		Tag: blume-20000627-noweb
686		Description:
687
688		Changes:
689
690		1. Implemented "subdir" and "witness" options for noweb tool.
691		This caused some slight internal changes in CM's tool implementation.
692		2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
693		some remaining issues from earlier path anchor changes.
694		3. Updated CM manual accordingly.
695
696		4. Changed implementation of back-tracing so that I now consider it
697		ready for prime-time.
698
699		In particular, you don't have to explicitly trigger the back-trace
700		anymore.  Instead, if you are running BTrace-instrumented code and
701		there is an uncaught exception (regardless of whether or not it was
702		raised in instrumented code), the top-level evalloop will print
703		the back-trace.
704
705		Features:
706
707		- Instrumented and uninstrumented code work together seemlessly.
708		(Of course, uninstrumented code is never mentioned in actual
709		back-traces.)
710
711		- Asymptotic time- and space-complexity of instrumented code is
712		equal to that of uninstrumented code.  (This means that
713		tail-recursion is preserved by the instrumentation phase.)
714
715		- Modules whose code has been instrumented in different sessions
716		work together without problem.
717
718		- There is no penalty whatsoever on uninstrumented code.
719
720		- There is no penalty on "raise" expressions, even in
721		instrumented code.
722
723		A potential bug (or perhaps it is a feature, too):
724
725		A back-trace reaches no further than the outermost instrumented
726		non-trivial "raise".  Here, a "trivial" raise is one that is the
727		sole RHS of a "handle" rule.  Thus, back-traces reach trough
728
729		<exp> handle e => raise e
730
731		and even
732
733		<exp> handle Foo => raise Bar
734
735		and, of course, through
736
737		<exp> handle Foo => ...
738
739		if the exception was not Foo.
740
741		Back-traces always reach right through any un-instrumented code
742		including any of its "handle" expressions, trivial or not.
743
744		To try this out, do the following:
745
746		- Erase all existing binfiles for your program.
747		(You may keep binfiles for those modules where you think you
748		definitely don't need back-tracing.)
749		- Turn on back-trace instrumentation:
750		SMLofNJ.Internals.BTrace.mode (SOME true);
751		- Recompile your program.  (I.e., run "CM.make" or "use".)
752		- You may now turn instrumentation off again (if you want):
753		SMLofNJ.Internals.BTrace.mode (SOME false);
754		- Run your program as usual.  If it raises an exception that
755		reaches the interactive toplevel, then a back-trace will
756		automatically be printed.  After that, the toplevel loop
757		will print the exception history as usual.
758
759		----------------------------------------------------------------------
760		Name: Matthias Blume
761		Date: 2000/06/26 09:56:46 JST
762		Tag: blume-20000626-setup
763		Description:
764
765		CM: - setup-parameter to "sml" added; this can be used to run arbitrary
766		ML code before and after compiling a file (e.g., to set compiler
767		flags)
768
769		Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
770		- associated changes to btrace.sml (BTrace instrumentation pass)
771		- cleaner implementation of btimp.sml (BTrace tracing and report
772		module)
773
774		CM manual: * new path encoding documented
775		* description of setup-parameter to "sml" added
776
777		The biggest user-visible change to back-tracing is that it is no
778		longer necessary to compile all traced modules within the same
779		session.  (This was a real limitation.)
780
781		----------------------------------------------------------------------
782		Name: Matthias Blume
783		Date: 2000/06/24 12:40:00 JST
784		Tag: blume-20000624-startup
785		Description:
786
787		Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
788		bit too often -- to put it mildly. :)
789
790		----------------------------------------------------------------------
791		Name: Matthias Blume
792		Date: 2000/06/23 18:20:00 JST
793		Tag: blume-20000623-btrace
794		Description:
795
796		This updates adds a backtrace facility to aid programmers in debugging
797		their programs.  This involves the following changes:
798
799		1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
800		keeping track of the current call stack.  When programs are compiled
801		in a special mode, the compiler will insert calls to these hooks
802		into the user program.
803		"Hook" means that it is possible for different implementations of
804		back-tracing to register themselves (at different times).
805
806		2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
807		as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
808		It can be turned on using this call:
809		SMLofNJ.Internals.BTrace.mode (SOME true);
810		Turning it off again:
811		SMLofNJ.Internals.BTrace.mode (SOME false);
812		Querying the current status:
813		SMLofNJ.Internals.BTrace.mode NONE;
814		Annotated programs are about twice as big as normal ones, and they
815		run a factor of 2 to 4 slower with a dummy back-trace plugin (one
816		where all hooks do nothing).  The slowdown with a plugin that is
817		actually useful (such as the one supplied by default) is even greater,
818		but in the case of the default plugin it is still only an constant
819		factor (amortized).
820
821		3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
822		with a sub-structure BTrace for controlling back-tracing.  In particular,
823		the above-mentioned function "mode" controls whether the annotation
824		phase is invoked by the compiler.  Another important function is
825		"trigger": when called it aborts the current execution and causes
826		the top-level loop to print a full back-trace.
827
828		4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
829		for back-tracing.  It keeps track of the dynamic call stack and in
830		addition to that it keeps a partial history at each "level" of that
831		stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
832		d and b (at separate times, dynamically), then the report will show:
833
834		GOTO   d
835		/c
836		GOTO  \b
837		CALL   a
838
839		This shows that there was an initial non-tail call of a, then a
840		tail-call to b or c, looping behavior in a cluster of functions that
841		consist of b and c, and then a goto from that cluster (i.e., either from
842		b or from c) to d.
843
844		Note that (depending on the user program) the amount of information
845		that the back-trace module has to keep track of at each level is bounded
846		by a constant.  Thus, the whole implementation has the same asymptotical
847		complexity as the original program (both in space and in time).
848
849		5. compiler/TopLevel/interact/evalloop.sml has been modified to
850		handle the special exception SMLofNJ.Internals.BTrace.BTrace
851		which is raised by the "trigger" function mentioned above.
852
853		Notes on usage:
854
855		- Annotated code works well together with unannotated code:
856		Unannotated calls simply do not show up at all in the backtrace.
857
858		- It is not a good idea to let modules that were annotated during
859		different sessions run at the same time.  This is because the compiler
860		chooses small integers to identify individual functions, and there
861		will be clashes if different modules were compiled in separate sessions.
862		(Nothing will crash, and you will even be told about the clashes, but
863		back-trace information will in general not be useful.)
864
865		- Back-tracing can be confused by callcc and capture.
866
867		- The only way of getting a back-trace right now is to explicitly
868		invoke the "trigger" function from your user program.  Eventually, we
869		should make every exception carry back-trace information (if
870		available).  But since this creates more overhead at "raise"-time
871		(similar to the current exnHistory overhead), I have not yet
872		implemented this.  (The implementation will be rather easy.)  With
873		exceptions carrying back-trace information, this facility will be even
874		more useful because users don't need to modify their programs...
875
876		- While it is possible to compile the compiler with back-trace
877		annotations turned on (I did it to get some confidence in
878		correctness), you must make absolutely sure that core.sml and
879		btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
880		be compiled with annotation because there is no core access yet, but
881		if you compile btimp.sml with annotation, then the system will go into
882		an infinite recursion and crash.)
883		Since CM currently does not know about BTrace, the only way to turn
884		annotations on and off for different modules of the compiler is to
885		interrupt CMB.make, change the settings, and re-invoke it.  Of course,
886		this is awkward and clumsy.
887
888		Sample sessions:
889
890		Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
891		- SMLofNJ.Internals.BTrace.mode (SOME true);
892		[autoloading]
893		[autoloading done]
894		val it = false : bool
895		- structure X = struct
896		-     fun main n = let
897		-         fun a (x, 0) = d x
898		-           | a (x, n) = b (x, n - 1)
899		-         and b (x, n) = c (x, n)
900		-         and c (x, n) = a (x, n)
901		-         and d x = e (x, 3)
902		-         and e (x, 0) = f x
903		-           | e (x, n) = e (x, n - 1)
904		-         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
905		-           | f n = n * g (n - 1)
906		-         and g n = a (n, 3)
907		-     in
908		-         f n
909		-     end
910		- end;
911		structure X : sig val main : int -> int end
912		- X.main 3;
913		*** BACK-TRACE ***
914		GOTO   stdIn:4.2-13.20: X.main[2].f
915		GOTO-( stdIn:4.2-13.20: X.main[2].e
916		GOTO   stdIn:4.2-13.20: X.main[2].d
917		/ stdIn:4.2-13.20: X.main[2].a
918		| stdIn:4.2-13.20: X.main[2].b
919		GOTO-\ stdIn:4.2-13.20: X.main[2].c
920		CALL   stdIn:4.2-13.20: X.main[2].g
921		GOTO   stdIn:4.2-13.20: X.main[2].f
922		GOTO-( stdIn:4.2-13.20: X.main[2].e
923		GOTO   stdIn:4.2-13.20: X.main[2].d
924		/ stdIn:4.2-13.20: X.main[2].a
925		| stdIn:4.2-13.20: X.main[2].b
926		GOTO-\ stdIn:4.2-13.20: X.main[2].c
927		CALL   stdIn:4.2-13.20: X.main[2].g
928		GOTO   stdIn:4.2-13.20: X.main[2].f
929		GOTO-( stdIn:4.2-13.20: X.main[2].e
930		GOTO   stdIn:4.2-13.20: X.main[2].d
931		/ stdIn:4.2-13.20: X.main[2].a
932		| stdIn:4.2-13.20: X.main[2].b
933		GOTO-\ stdIn:4.2-13.20: X.main[2].c
934		CALL   stdIn:4.2-13.20: X.main[2].g
935		GOTO   stdIn:4.2-13.20: X.main[2].f
936		CALL   stdIn:2.15-17.4: X.main[2]
937		-
938
939		(Note that because of a FLINt bug the above code currently does not
940		compile without BTrace turned on.)
941
942		Here is another example, using my modified Tiger compiler:
943
944		Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
945		- SMLofNJ.Internals.BTrace.mode (SOME true);
946		[autoloading]
947		[autoloading done]
948		val it = false : bool
949		- CM.make "sources.cm";
950		[autoloading]
951		...
952		[autoloading done]
953		[scanning sources.cm]
954		[parsing (sources.cm):parse.sml]
955		[creating directory CM/SKEL ...]
956		[parsing (sources.cm):tiger.lex.sml]
957		...
958		[wrote CM/sparc-unix/semant.sml]
959		[compiling (sources.cm):main.sml]
960		[wrote CM/sparc-unix/main.sml]
961		[New bindings added.]
962		val it = true : bool
963		- Main.compile ("../testcases/merge.tig", "foo.out");
964		*** BACK-TRACE ***
965		CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
966		CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
967		CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
968		GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
969		CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
970		CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
971		CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
972		/ lib/semant.sml:411.65-543.8: SemantFun[2].transDec
973		CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
974		CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
975		CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
976		CALL   main.sml:1.18-118.4: Main.compile[2]
977		-
978
979		----------------------------------------------------------------------
980		Name: Matthias Blumen
981		Date: 2000/06/21 18:00:00 JST
982		Tag: blume-20000621-manual
983		Description:
984
985		CM manual update: Path environments documented.
986
987		----------------------------------------------------------------------
988		Name: Matthias Blume
989		Date: 2000/06/19 13:40:00
990		Tag: blume-20000619-manual
991		Description:
992
993		CM manual and system/README update.  This only covers the fact that
994		there are no more implicit anchors.  (Path environments and the "bind"
995		option to "cm" have yet to be documented.)
996
997		----------------------------------------------------------------------
998		Name: Matthias Blume
999		Date: 2000/06/19 11:05:00 JST
1000		Tag: blume-20000619-chdir-bugfix
1001		Description:
1002
1003		Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
1004
1005		----------------------------------------------------------------------
1006		Name: Matthias Blume
1007		Date: 2000/06/18 22:00:10 JST
1008		Tag: blume-20000618-implicit-anchors-really-gone
1009		Description:
1010
1011		I updates the previous HISTORY entry where I forgot to mention that
1012		implicit anchors are no longer with us.
1013
1014		The current update also gets rid of the (now useless) controller
1015		CM.Control.implicit_anchors.
1016
1017		----------------------------------------------------------------------
1018		Name: Matthias Blume
1019		Date: 2000/06/16 17:30:00 JST
1020		Tag: blume-20000616-anchorenv
1021		Description:
1022
1023		This patch implements the long anticipated (just kidding :) "anchor
1024		environment" mechanism.  In the course of doing this, I also
1025		re-implemented CM's internal "SrcPath" module from scratch.  The new
1026		one should be more robust in certain boundary cases.  In any case, it
1027		is a lot cleaner than its predecessor (IMHO).
1028
1029		This time, although there is yet another boot file format change, I
1030		kept the unpickler backward-compatible.  As a result, no new bootfiles
1031		are necessary and bootstrapping is straightforward.  (You cannot read
1032		new bootfiles into an old system, but the other way around is no
1033		problem.)
1034
1035		Visible changes:
1036
1037		** 0. Implicit path anchors (without the leading $-symbol) are no
1038		longer recognized at all. This means that such path names are not
1039		illegal either.  For example, the name basis.cm simply refers to a
1040		local file called "basis.cm" (i.e, the name is an ordinary path
1041		relative to .cm-files directory).  Or, to put it differently, only
1042		names that start with $ are anchored paths.
1043
1044		** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
1045		vanished.
1046
1047		John (Reppy) had critizised this as soon as I originally proposed and
1048		implemented it, but at that time I did not really deeply believe
1049		him. :) Now I came full-circle because I need the $<singlearc> syntax
1050		in another place where it cannot be seen as an abbreviation for
1051		$/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
1052		seems to mean (i.e., it "expands" into the corresponding anchor
1053		value).
1054
1055		However, when paths are used as members in CM description files, it
1056		continues to be true that there must be at least another arc after the
1057		anchor.  This is now enforced separately during semantic analysis
1058		(i.e., from a lexical/syntactical point of view, the notation is ok.)
1059
1060		** 2. The "cm" class now accepts an option "bind".  The option's value
1061		is a sub-option list of precisely two items -- one labeled "anchor"
1062		and the other one labeled "value".  As you might expect, "anchor" is
1063		used to specify an anchor name to be bound, and "value" specifies what
1064		the anchor is being bound to.
1065
1066		The value must be a directory name and can be given in either standard
1067		syntax (including the possibility that it is itself an anchored path)
1068		or native syntax.
1069
1070		Examples:
1071
1072		foo.cm (bind:(anchor:bar value:$mystuff/bar))
1073		lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
1074
1075		and so on.
1076
1077		The meaning of this is that the .cm-file will be processed with an
1078		augmented anchor environment where the given anchor(s) is/are bound to
1079		the given values(s).
1080
1081		The rationale for having this feature is this: Suppose you are trying
1082		to use two different (already stable) libraries a.cm and b.cm (that
1083		you perhaps didn't write yourself).  Further, suppose each of these
1084		two libraries internally uses its own auxiliary library $aux/lib.cm.
1085		Normally you would now have a problem because the anchor "lib" can not
1086		be bound to more than one value globally.  Therefore, the project that
1087		uses both a.cm and b.cm must locally redirect the anchor to some other
1088		place:
1089
1090		a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
1091		b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
1092
1093		This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
1094		/usr/lib/smlnj/b-stuff/aux.cm, respectively.
1095
1096		Hard-wiring path names is a bit inflexible (and CM will verbosely warn
1097		you when you do so at the time of CM.stabilize).  Therefore, you can
1098		also use an anchored path as the value:
1099
1100		a.cm (bind:(anchor:lib value:$a-lib))
1101		b.cm (bind:(anchor:lib value:$b-lib))
1102
1103		Now you can globally configure (using the usual CM.Anchor.anchor or
1104		pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
1105		itself is always locally bound, setting it globally is no longer
1106		meaningful or necessary (but it does not hurt either).  In fact, "lib"
1107		can still be used as a global anchor for separate purposes.  As a
1108		matter of fact, one can locally define "lib" in terms of a global
1109		"lib":
1110
1111		a.cm (bind:(anchor:lib value:$lib/a))
1112		b.cm (bind:(anchor:lib value:$lib/b))
1113
1114		** 3: The encoding of path names has changed.  This affects the way
1115		path names are shown in CM's progress report and also the internal
1116		protocol encoding used for parallel make.
1117
1118		The encoding now uses one or more ':'-separated segments.  Each
1119		segments corresponds to a file that has been specified relative to the
1120		file given by its preceding segment.  The first segment is either
1121		relative to the CWD, absolute, or anchored.  Each segment itself is
1122		basically a Unix pathname; all segments but the first are relative.
1123
1124		Example:
1125
1126		$foo/bar/baz.cm:a/b/c.sml
1127
1128		This path denotes the file bar/a/b/c.sml relative to the directory
1129		denoted by anchor "foo".  Notice that the encoding also includes
1130		baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
1131		paths are resolved relative to the .cm-files directory, so baz.cm must
1132		be ignored to get the "real" pathname.
1133
1134		To make this fact more obvious, CM puts the names of such "virtual
1135		arcs" into parentheses when they appear in progress reports. (No
1136		parentheses will appear in the internal protocol encoding.)  Thus,
1137		what you really see is:
1138
1139		$foo/bar/(baz.cm):a/b/c.sml
1140
1141		I find this notation to be much more informative than before.
1142
1143		Another new feature of the encoding is that special characters
1144		including parentheses, colons, (back)slashes, and white space are
1145		written as \ddd (where ddd is the decimal encoding of the character).
1146
1147		*** The CM manual still needs to be updated.
1148
1149		----------------------------------------------------------------------
1150		Name: Allen Leung
1151		Date: 2000/06/15 00:38:00
1152		Tag: leunga-20000615-x86-peephole
1153
1154		x86 Peephole fix by Fermin.  Affects c-- and moby only.
1155
1156		----------------------------------------------------------------------
1157		Name: Matthias Blume
1158		Date: 2000/06/12 11:40:00
1159		Tag: blume-20000612-parmakefix
1160		Description:
1161
1162		More cleanup after changing the file naming scheme: This time I
1163		repaired the parallel make mechanism for CMB.make which I broke earlier.
1164
1165		----------------------------------------------------------------------
1166		Name: Allen Leung
1167		Date: 2000/06/09 01:25:00
1168		Tag: leunga-20000609-various
1169
1170		None of these things should affect normal SML/NJ operations
1171
1172		1. Peephole improvements provided by Fermin (c--)
1173		2. New annotation DEFUSE for adding extra dependence (moby)
1174		3. New X86 LOCK instructions (moby)
1175		4. New machine description language for reservation tables (scheduling)
1176		5. Fixes to various optimization/analysis modules (branch chaining, dominator
1177		trees etc.)
1178		6. I've changed the CM files so that they can work with versions
1179		110.0.6, 110.25 and 110.28
1180
1181		----------------------------------------------------------------------
1182		Name: Matthias Blume
1183		Date: 2000/06/09 12:40:00
1184		Tag: blume-20000609-log
1185		Description:
1186
1187		- Removed all(?) remaining RCS Log entries from sources.
1188
1189		- Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
1190		anchored paths).
1191
1192		----------------------------------------------------------------------
1193		Name: Matthias Blume
1194		Date: 2000/06/07 17:00:00 JST
1195		Tag: blume-20000607-no-implicit-anchors
1196		Description:
1197
1198		1. This update changes the default setting for
1199		CM.Control.implicit_anchors from true to false.  This means that
1200		implicit anchors are no longer permitted by default.  I also tried to
1201		make sure that nothing else still relies on implicit anchors.
1202		(This is the next step on the schedule towards a CM that does not even
1203		have the notion of implicit anchors anymore.)
1204
1205		2. More CM manual updates.
1206
1207		3. I managed to track down and fix the pickling bug I mentioned last
1208		time.  Because of the previously existing workaround, this entails no
1209		immediate practical changes.
1210
1211		----------------------------------------------------------------------
1212		Name: Matthias Blume
1213		Date: 2000/06/06 11:15:00 JST
1214		Tag: blume-20000606-lazierpickle
1215		Description:
1216
1217		!!!! NEW BOOT FILES !!!!
1218
1219		* The main purpose of this update is to make library pickles lazier in
1220		order to reduce the initial space penalty for autoloading a library.
1221		As a result, it is now possible to have $smlnj/compiler.cm
1222		pre-registered.  This should take care of the many complaints or
1223		inquiries about missing structure Compiler.  This required changes to
1224		CM's internal data structures and small tweaks to some algorithms.
1225
1226		As a neat additional effect, it is no longer necessary (for the sake
1227		of lean heap image files) to distinguish between a "minimal" CM and a
1228		"full" CM.  Now, there is only one CM (i.e., the "full" version:
1229		$smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
1230		interactive top level. ($smlnj/cm/minimal.cm is gone.)
1231
1232		To make the life of compiler-hackers easier, "makeml" now also
1233		pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
1234		words, after you bootstrap a new sml for the first time, you will not
1235		have to autoload $smlnj/cmb.cm again afterwards.  (The first time
1236		around you will still have to do it, though.)
1237
1238		* A second change consists of major updates to the CM manual.  There
1239		are now several appendices with summary information and also a full
1240		specification of the CM description file syntax.
1241
1242		* In directory src/system I added the script "allcross".  This script
1243		invokes sml and cross-compiles the compiler for all supported
1244		architectures.  (Useful when providing a new set of boot files.)
1245
1246		* There seems to be a latent bug in my "lazy pickles" mechanism.  I
1247		added a small tweak to pickle-util.sml to work around this problem,
1248		but it is not a proper fix yet.  I will investigate further.  (The
1249		effect of the bug was an inflation of library pickle size.)
1250
1251		* Version number increased to 110.28.1 (to avoid compatibility problems).
1252
1253		----------------------------------------------------------------------
1254		Name: Allen Leung
1255		Date: 2000/05/25 17:28 EDT
1256		Tag: leunga-20000525-ra
1257		Description:
1258
1259		Fixed a bug in freezing phase of the register allocator.
1260
1261		----------------------------------------------------------------------
1262		Name: Allen Leung
1263		Date: 2000/05/15 22:53 EDT
1264		Tag: leunga-20000515-alpha-x86-ra
1265		Description:
1266
1267		1. Alpha
1268
1269		Slight cleanup.  Removed the instruction SGNXL
1270
1271		2. X86
1272
1273		Added the following instructions to the instruction set:
1274
1275		ROLx, RORx,
1276		BTx, BTSx, BTLx, BTRx,
1277		XCHGx, and variants with the LOCK prefix
1278
1279		3. Register Allocation
1280
1281		The module ra-rewrite-with-renaming has been improved.
1282
1283		These have no effect on SML/NJ.
1284
1285		----------------------------------------------------------------------
1286		Name: Matthias Blume
1287		Date: 2000/05/15 16:20:00 JST
1288		Tag: blume-20000515-lightrebuild
1289		Description:
1290
1291		1. I added an alternative to "-rebuild" to "makeml".  The difference is
1292		that prior to calling CMB.make' the CM-variable "LIGHT" will be
1293		defined.  In effect, the command will not build any cross-compiler
1294		backends and therefore finish more quickly.
1295
1296		The "fixpt" script also takes a "-light" switch to be able to use
1297		this new facility while compiling for a fixpoint.
1298
1299		2. I replaced all mentions of anchored paths in group owner specifications
1300		with simple relative paths (usually starting with "..").
1301		The rationale is that a library's internal workings should not be
1302		compromised by the lack of some anchor.  (An anchor is necessary
1303		for someone who wants to refer to the library by an anchored path,
1304		but it should not be necessary to build the same library in the first
1305		place.)
1306
1307		3. I changed the way CM's tool mechanism determines the shell command
1308		string used for things like ml-yacc etc. so that it does not break
1309		when CM.Control.implicit_anchors is turned off.
1310
1311		----------------------------------------------------------------------
1312		Name: Matthias Blume
1313	Date: 2000/05/12 18:20:00 JST	Date: 2000/05/12 18:20:00 JST
1314	Tag: blume-20000512-ml-build	Tag: blume-20000512-ml-build
1315	Description:	Description:
#	Line 444	Line 1741
1741
1742	3.  Assembly	3.  Assembly
1743
1744	When generating assemby, resolve the value of client defined constants,	When generating assembly, resolve the value of client defined constants,
1745	instead of generating symbolic values.  This is controlled by the	instead of generating symbolic values.  This is controlled by the
1746	new flag "asm-resolve-constants", which is default to true.	new flag "asm-resolve-constants", which is default to true.
1747
#	Line 467	Line 1764
1764
1765	To this end, I arranged that instead of "structure Core" as "structure	To this end, I arranged that instead of "structure Core" as "structure
1766	_Core" is bound in the pervasive environment.  Core access is done via	_Core" is bound in the pervasive environment.  Core access is done via
1767	_Core (which can never be accidentially rebound because _Core is not a	_Core (which can never be accidentally rebound because _Core is not a
1768	legal surface-syntax symbol).	legal surface-syntax symbol).
1769
1770	The current solution is much cleaner because the core environment is	The current solution is much cleaner because the core environment is
#	Line 477	Line 1774
1774	with dynamic and symbolic parts of the core environment.	with dynamic and symbolic parts of the core environment.
1775
1776	Remaining hackery (to bind the "magic" symbol _Core) is localized in the	Remaining hackery (to bind the "magic" symbol _Core) is localized in the
1777	compilation mananger's bootstrap compiler (actually: in the "init group"	compilation manager's bootstrap compiler (actually: in the "init group"
1778	handling).  See the comments in src/system/smlnj/init/init.cmi for	handling).  See the comments in src/system/smlnj/init/init.cmi for
1779	more details.	more details.
1780
#	Line 592	Line 1889
1889	(specified in the .cm file at each instance where the tool's class is	(specified in the .cm file at each instance where the tool's class is
1890	used).	used).
1891
1892	This was done to accomodate the new "make" and "shell" tools which	This was done to accommodate the new "make" and "shell" tools which
1893	facilitate fairly seemless hookup to portions of code managed using	facilitate fairly seamless hookup to portions of code managed using
1894	Makefiles or Shell scripts.	Makefiles or Shell scripts.
1895
1896	There are no classes "shared" or "private" anymore.  Instead, the	There are no classes "shared" or "private" anymore.  Instead, the
#	Line 605	Line 1902
1902
1903	All existing tools are described in the CM manual.	All existing tools are described in the CM manual.
1904
1905	- Slightly better error handling.  (CM now surpresses many followup	- Slightly better error handling.  (CM now suppresses many followup
1906	error messages that tended to be more annoying than helpful.)	error messages that tended to be more annoying than helpful.)
1907
1908	2. Major changes to the compiler's static environment data structures.	2. Major changes to the compiler's static environment data structures.
#	Line 739	Line 2036
2036
2037	I've changed andl to testl in the floating point test sequence	I've changed andl to testl in the floating point test sequence
2038	whenever appropriate.  The Intel optimization guide states that	whenever appropriate.  The Intel optimization guide states that
2039	testl is perferable to andl.	testl is preferable to andl.
2040
2041	7. RA (x86 only)	7. RA (x86 only)
2042
#	Line 921	Line 2218
2218
2219	1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an	1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
2220	additional argument called "template" which is an optional string that	additional argument called "template" which is an optional string that
2221	specifiel the layout of the tool command line.  See the CM manual for	specifies the layout of the tool command line.  See the CM manual for
2222	explanation.	explanation.
2223
2224	2. A special-purpose tool can be "regisitered" by simply dropping the	2. A special-purpose tool can be "registered" by simply dropping the
2225	corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same	corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
2226	directory where the .cm file lives that uses this tool.  (The	directory where the .cm file lives that uses this tool.  (The
2227	behavior/misfeature until now was to look for the tool description	behavior/misfeature until now was to look for the tool description
#	Line 968	Line 2265
2265	rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for	rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
2266	<k>=1,2,... is normally not a good idea when invoking fixpt.  However,	<k>=1,2,... is normally not a good idea when invoking fixpt.  However,
2267	they might be the result of an earlier partial run of fixpt (which	they might be the result of an earlier partial run of fixpt (which
2268	perhaps got accidentially killed).  In this case, fixpt will quickly	perhaps got accidentally killed).  In this case, fixpt will quickly
2269	move through what exists before continuing where it left off earlier,	move through what exists before continuing where it left off earlier,
2270	and, thus, saves a lot of time.	and, thus, saves a lot of time.
2271
#	Line 1018	Line 2315
2315	it from that remote directory.	it from that remote directory.
2316	This should simplify installation further:  For machines that have	This should simplify installation further:  For machines that have
2317	access to the internet, just fetch <version>-config.tgz, unpack it,	access to the internet, just fetch <version>-config.tgz, unpack it,
2318	edit config/targets, and go (run config/install.sh).  The scipt will	edit config/targets, and go (run config/install.sh).  The script will
2319	fetch everything else that it might need all by itself.	fetch everything else that it might need all by itself.
2320
2321	For CVS users, this mechanism is not relevant for source archives, but	For CVS users, this mechanism is not relevant for source archives, but

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