Home My Page Projects Code Snippets Project Openings SML/NJ
Summary Activity Forums Tracker Lists Tasks Docs Surveys News SCM Files

SCM Repository

[smlnj] Diff of /sml/trunk/HISTORY
ViewVC logotype

Diff of /sml/trunk/HISTORY

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 588, Fri Mar 31 09:00:02 2000 UTC revision 772, Thu Jan 4 15:36:41 2001 UTC
# Line 11  Line 11 
11  Date:  Date:
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    ----------------------------------------------------------------------
15    Name: Matthias Blume
16    Date: 2001/01/05 00:30:00 JST
17    Tag: blume-20010105-primops
18    Description:
19    
20    Added some experimental support for work that I am doing right now.
21    These changes mostly concern added primops, but there is also a new
22    experimental C library in the runtime system (but currently not enabled
23    anywhere except on Linux/X86).
24    
25    In the course of adding primops (and playing with them), I discovered that
26    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
27    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
28    To recover, I made type information in INL_PRIM mandatory and changed
29    prim.sml as well as built-in.sml accordingly.  The InLine structure now
30    has complete, correct type information (i.e., no bottom types).
31    
32    Since all these changes mean that we need new binfiles, I also bumped the
33    version number to 110.32.1.
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2000/12/30 22:10:00 JST
38    Tag: blume-20001230-various
39    Description:
40    
41    Added proxy libraries for MLRISC and let MLRISC libraries refer
42    to each other using path anchors.  (See CM manual for explanation.)
43    
44    Updated CM documentation.
45    
46    Fixed some bugs in CM.
47    
48    Implemented "proxy" libraries (= syntactic sugar for CM).
49    
50    Added "-quiet" option to makeml and changed runtime system accordingly.
51    
52    Added cleanup handler for exportML to reset timers and compiler stats.
53    
54    ----------------------------------------------------------------------
55    Name: Lal George
56    Date: 2000/12/22 22:22:58 EST 2000
57    Tag: Release_110_32
58    Description:
59    
60            Infinite precision used throughout MLRISC.
61            see MLRISC/mltree/machine-int.sig
62    
63    ----------------------------------------------------------------------
64    Name: Matthias Blume
65    Date: 2000/12/22 23:16:00 JST
66    Tag: blume-20001222-warn
67    Description:
68    
69    Corrected wording and formatting of some CM warning message which I
70    broke in my previous patch.
71    
72    ----------------------------------------------------------------------
73    Name: Matthias Blume
74    Date: 2000/12/22 21:20:00 JST
75    Tag: blume-20001222-anchorenv
76    Description:
77    
78    Fixed CM's handling of anchor environments in connection with CMB.make.
79    
80    ----------------------------------------------------------------------
81    Name: Matthias Blume
82    Date: 2000/12/22 13:15:00 JST
83    Tag: blume-20001222-cleanup
84    Description:
85    
86    Removed src/cm/ffi which does not (and did not) belong here.
87    
88    ----------------------------------------------------------------------
89    Name: Matthias Blume
90    Date: 2000/12/21 23:55:00 JST
91    Tag: blume-20001221-exn
92    Description:
93    
94    Probably most important: CM no longer silently swallows all exceptions
95    in the compiler.
96    Plus: some other minor CM changes.  For example, CM now reports some
97    sizes for generated binfiles (code, data, envpickle, lambdapickle).
98    
99    ----------------------------------------------------------------------
100    Name: Matthias Blume
101    Date: 2000/12/15 00:01:05 JST
102    Tag: blume-20001215-dirtool
103    Description:
104    
105    - "dir" tool added.
106    - improvements and cleanup to Tools structure
107    - documentation updates
108    
109    ----------------------------------------------------------------------
110    Name: Allen Leung
111    Date: Thu Dec 14 03:45:24 EST 2000
112    Description:
113    Tag:  leunga-20001214-int-inf
114    Description:
115    
116       In IntInf, added these standard functions, which are missing from our
117    implementation:
118    
119        andb : int * int -> int
120        xorb : int * int -> int
121        orb  : int * int -> int
122        notb : int -> int
123         <<   : int * word -> int
124        ~>>  : int * word -> int
125    
126       Not tested, I hope they are correct.
127    
128    ----------------------------------------------------------------------
129    Name: Allen Leung
130    Date: Fri Dec  8 19:23:26 EST 2000
131    Description:
132    Tag:  leunga-20001208-nowhere
133    Description:
134    
135      Slight improvements to the 'nowhere' tool to handle OR-patterns,
136    to generate better error messages etc.  Plus a brief manual.
137    
138    ----------------------------------------------------------------------
139    Name: Lal George
140    Date: 2000/12/08 09:54:02 EST 2000
141    Tag: Release_110_31
142    Description:
143    
144    - Version 110.31
145    ----------------------------------------------------------------------
146    Name: Allen Leung
147    Date: Thu Dec  7 22:01:04 EST 2000
148    Tag:  leunga-20001207-cell-monster-hack
149    Description:
150    
151    Major MLRISC internal changes.  Affect all clients.
152    Summary:
153    
154    1.  Type CELLS.cell = int is now replaced by a datatype.
155        As a result, the old regmap is now gone.  Almost all interfaces
156        in MLRISC change as a consequence.
157    
158    2.  A new brand version of machine description tool (v3.0) that generates
159        modules expecting the new interface.  The old version is removed.
160    
161    3.  The RA interface has been further abstracted into two new functors.
162        RISC_RA and X86RA.  These functors have much simpler interfaces.
163        [See also directory MLRISC/demo.]
164    
165    4.  Some other new source->source code generation tools are available:
166    
167        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
168        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
169           I use this tool to generate the peephole optimizers---with the new
170           cell type changes, peephole rules are becoming difficult to write
171           without conditional pattern matching.
172    
173    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
174        cover the entire MLRISC source tree so many things broke.
175    
176    6.  CM files have been moved to the subdirectory MLRISC/cm.
177        They are moved because there are a lot of them and they clutter up the
178        root dir.
179    
180    7.  More detailed documentation to come...
181    
182        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
183        a makeml -rebuild first.  This is because of other other
184        changes that Matthias has made (see below).
185    
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume
189    Date: 2000/11/30 23:12:00 JST
190    Tag: blume-20001130-filereorg
191    Description:
192    
193    Some manual updates and some file reorganizations in CM.
194    
195    ----------------------------------------------------------------------
196    Name: Matthias Blume
197    Date: 2000/11/24 17:45:00 JST
198    Tag: blume-20001124-link
199    Description:
200    
201    Drastically improved link traversal code for the case that the dynamic
202    value was already loaded at bootstrap time.  As a result, CM and CMB
203    now both load blazingly fast -- even on a very slow machine.  Also,
204    memory consumption has been further reduced by this.
205    
206    Warning: The format of the PIDMAP file has changed.  THerefore, to
207    bootstrap you have to do this:
208    
209    1. Run CMB.make
210    2. Make a symbolic link for the boot directory:
211         ln -s sml.boot.ARCH-OS xxx
212    3. "Rebuild" the boot directory:
213         ./makeml -boot xxx -rebuild sml ; rm xxx
214    4. Boot normally:
215          ./makeml
216    
217    ----------------------------------------------------------------------
218    Name: Matthias Blume
219    Date: 2000/11/21 21:20:00 JST
220    Tag: blume-20001121-tools
221    Description:
222    
223    Continued hacking on autoloading problem -- with success this time.
224    Also changed tool-plugin mechanism.  See new CM manual.
225    
226    ----------------------------------------------------------------------
227    Name: Matthias Blume
228    Date: 2000/11/19 14:30:00 JST
229    Tag:  blume-20001119-autoload
230    Description:
231    
232    Some hacking to make autoloading faster.  Success for CMB, no success
233    so far for CM.  There is a reduced structure CM' that autoloads faster.
234    (This is a temporary, non-documented hack to be eliminated again when
235    the general problem is solved.)
236    
237    ----------------------------------------------------------------------
238    Name: Matthias Blume
239    Date: 2000/11/17 14:10:00 JST
240    Tag: blume-20001117-pickle-lib
241    Description:
242    
243    1. Eliminated comp-lib.cm
244    2. Made pickle-lib.cm
245    3. Eliminated all uses of intset.sml (from comp-lib.cm)
246    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
247       equivalent constructs from smlnj-lib.cm (INtHashTable).
248    5. Point 4. also goes for those uses of intmap.* in MLRISC.
249       Duplicated intmap modules thrown out.
250    6. Hunted down all duplicated SCC code and replaced it with
251       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
252    7. Rewrote Feedback module.
253    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
254       should be thrown out and equivalent modules from smlnj-lib.cm
255       should be used (IntRedBlackSet, IntListSet, ...).
256    
257    Confirmed that compiler compiles to fixpoint.
258    
259    ----------------------------------------------------------------------
260    Name: Allen Leung
261    Date: 2000/11/10 18:00:00
262    Tag: leunga-20001110-new-x86-fp
263    
264    A new x86 floating point code generator has been added.
265    By default this is turned off.  To turn this on, do:
266    
267        CM.autoload "$smlnj/compiler.cm";
268        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
269    
270    Changes:
271    
272    1.  Changed FTAN to FPTAN so that the assembly output is correct.
273    2.  Changed the extension callback for FTANGENT to generate:
274    
275              fptan
276              fstp  %st(0)
277        instead of
278              fptan
279              fstpl ftempmem
280    
281    3.  Numerous assembly fixes for x86.
282    
283    5.  Cleaned up the machine code output module x86/x86MC.sml and added
284        support for a whole bunch of instructions and addressing modes:
285    
286          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
287          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
288          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
289          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
290          fxch %st(n)
291          fld %st(n)
292          fst %st(n)
293          fst mem
294          fstp %st(n)
295          fucom %st(n)
296          fucomp %st(n)
297    
298        All these are now generated when the fast fp mode is turned on.
299    
300    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
301    
302    ----------------------------------------------------------------------
303    Name: Matthias Blume
304    Date: 2000/11/09 11:20:00 JST
305    Tag: blume-20001109-scc
306    Description:
307    
308    Eliminated some code duplication:
309    
310    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
311       (Otherwise the functor is useless.)
312    2. Used GraphSCCFn where SCCUtilFun was used previously.
313    3. Got rid of SCCUtilFun (in comp-lib.cm).
314    
315    ----------------------------------------------------------------------
316    Name: Lal George
317    Date: 2000/11/06 09:02:21 EST 2000
318    Tag: Release_110_30
319    Description:
320    
321    - Version 110.30
322    ----------------------------------------------------------------------
323    Name: Matthias Blume
324    Date: 2000/11/04 14:45:00
325    Tag: blume-20001104-mlbuild
326    Description:
327    
328    - Made ml-build faster on startup.
329    - Documentation fixes.
330    
331    ----------------------------------------------------------------------
332    Name: Matthias Blume
333    Date: 2000/11/02 17:00:00 JST
334    Tag: blume-20001102-condcomp
335    Description:
336    
337    - Small tweaks to pickler -- new BOOTFILES!
338    - Version bumped to 110.29.2.
339    - Added conditional compilation facility to init.cmi (see comment there).
340    ----------------------------------------------------------------------
341    Name: Allen Leung
342    Date: 2000/10/23 19:31:00
343    Tag: leunga-20001023-demo-ra
344    
345    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
346    2. Test programs for the graph library updated
347    3. Some new MLRISC demo programs added
348    
349    ----------------------------------------------------------------------
350    Name: Matthias Blume
351    Date: 2000/08/31 22:15:00 JST
352    Tag: blume-20001017-errmsg
353    Description:
354    
355    More error message grief: Where there used to be no messages, there
356    now were some that had bogus error regions.  Fixed.
357    
358    ----------------------------------------------------------------------
359    Name: Matthias Blume
360    Date: 2000/08/31 17:30:00 JST
361    Tag: blume-20001017-v110p29p1
362    Description:
363    
364    I made a version 110.29.1 with new bootfiles.
365    
366    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
367              CM documentation changes and a small bugfix in CM's error reporting.
368    
369    ----------------------------------------------------------------------
370    Name: Lal George
371    Date: 2000/09/27 14:42:35 EDT
372    Tag: george-20000927-nodestatus
373    Description:
374    
375    Changed the type of the nodestatus, so that:
376    
377            SPILLED(~1)             is now SPILLED
378            SPILLED(m) where m>=0   is now MEMREG(m)
379            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
380    
381    ----------------------------------------------------------------------
382    Name: Matthias Blume
383    Date: 2000/09/07 14:45:00 JST
384    Tag: blume-20000907-cmerrmsg
385    Description:
386    
387    Small tweak to CM to avoid getting ML syntax error messages twice.
388    
389    ----------------------------------------------------------------------
390    Name: Matthias Blume
391    Date: 2000/08/31 18:00:00 JST
392    Tag: blume-20000831-cvsbootfiles
393    Description:
394    
395    New URL for boot files (because the 110.29 files on the BL server do
396    now work correctly with my updated install scripts for yacc and lex).
397    
398    ----------------------------------------------------------------------
399    Name: Matthias Blume
400    Date: 2000/08/08 12:33:00 JST
401    Tag: blume-20000808-manual
402    Description:
403    
404    Tiny update to CM manual.
405    
406    ----------------------------------------------------------------------
407    Name: Allen Leung
408    Date: 2000/08/7 19:31:00
409    Tag: leunga-20000807-a-whole-bunch-of-stuff
410    
411      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
412    and Mobdy.
413    
414    1.  x86
415    
416       a.  Fixes to peephole module by John and Dan.
417       b.  Assembly fix to SETcc by Allen.
418       c.  Fix to c-call by John.
419       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
420       e.  Instruction selection optimization to SETcc as suggested by John.
421    
422           For example,
423    
424            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
425    
426           should generate:
427    
428            MOVL a, x
429            SUBL b, x
430            SHRL 31, x
431    
432    2.  IR stuff
433    
434         A bunch of new DJ-graph related algorithms added.  These
435         speed up SSA construction.
436    
437    3.  SSA + Scheduling
438    
439         Added code for SSA and scheduling to the repository
440    
441    ----------------------------------------------------------------------
442    Name: Lal George
443    Date: 2000/07/27 11:53:14 EDT
444    
445    Tag: lal-20000727-linux-ppc
446    Description:
447    
448     Made changes to support Linux PPC.
449     p.s. I have confirmation that the 110.29 boot files work fine.
450    
451    ----------------------------------------------------------------------
452    Name: Matthias Blume
453    Date: 2000/07/27 17:40:00 JST
454    Tag: blume-20000727-scripts
455    Description:
456    
457    !!!! WARNING !!!!
458    You must recompile the runtime system!
459    !!!! WARNING !!!!
460    
461    This is basically another round of script-enhancements:
462    
463    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
464       and undefine CM preprocessor symbols.
465    
466    2. ml-build avoids generating a new heap image if it finds that the
467       existing one is still ok.  (The condition is that no ML file had to
468       be recompiled and all ML files are found to be older that the heap
469       file.)
470    
471       To make this work smoothly, I also hacked the runtime system as
472       well as SMLofNJ.SysInfo to get access to the heap image suffix
473       (.sparc-solaris, ...) that is currently being used.
474    
475       Moreover, the signature of CM.mk_standalone has changed.  See the
476       CM manual.
477    
478    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
479       CM manual for details.)
480    
481    4. More CM manual updates:
482        - all of the above has been documented.
483        - there is now a section describing the (CM-related) command line
484          arguments that are accepted by the "sml" command
485    
486    ----------------------------------------------------------------------
487    Name: Matthias Blume
488    Date: 2000/07/25 16:20:00 JST
489    Tag: blume-20000725-makedepend
490    Description:
491    
492    Added a script called ml-makedepend.  This can be used in makefiles
493    for Unix' make in a way very similar to the "makedepend" command for
494    C.
495    
496    The script internally uses function CM.sources.
497    
498    Synopsis:
499    
500        ml-makedepend [-f makefile] cmfile targetname
501    
502    The default for the makefile is "makefile" (or "Makefile" should
503    "makefile" not exist).
504    
505    ml-makedepend adds a cmfile/targetname-specific section to this
506    makefile (after removing the previous version of this section).  The
507    section contains a single dependency specification with targetname on
508    the LHS (targetname is an arbitrary name), and a list of files derived
509    from the cmfile on the RHS.  Some of the files on the RHS are
510    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
511    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
512    path names.  The makefile writer is responsible for making sure that
513    these variables have correct at the time "make" is invoked.
514    
515    ----------------------------------------------------------------------
516    Name: Matthias Blume
517    Date: 2000/07/22 23:30:00 JST
518    Tag: blume-20000722-urlupdate
519    Description:
520    
521    Changed BOOT and config/srcarchiveurl to point to BL server:
522    
523        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
524    
525    ----------------------------------------------------------------------
526    Name: Matthias Blume
527    Date: 2000/07/18 18:00:00 JST
528    Tag: blume-20000718-Version_110_29
529    Description:
530    
531    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
532    
533    2. Updated config/version to 110.29
534    
535    3. Updated config/srcarchiveurl
536    
537    3. New boot files!
538       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
539    
540    ----------------------------------------------------------------------
541    Name: Matthias Blume
542    Date: 2000/07/11 13:58:00 JST
543    Tag: blume-20000711-doctypo
544    Description:
545    
546    Fixed a few typos in CM manual.
547    
548    ----------------------------------------------------------------------
549    Name: Allen Leung
550    Date: 2000/06/15 00:38:00
551    Tag: leunga-20000704-sparc-x86
552    
553    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
554    2. fix to x86 RET bug [found by Dan Grossman]
555    3. sparc assembly bug fix for ticc instructions [found by Fermin]
556    
557       Affects c-- and moby only
558    
559    ----------------------------------------------------------------------
560    Name: Matthias Blume
561    Date: 2000/07/04 15:26:00
562    Tag: blume-20000704-trigger
563    Description:
564    
565    1. Improvements to CM manual.
566    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
567       of getting a back-trace.  The function, when called, raises an
568       internal exception which explicitly carries the full back-trace history,
569       so it is unaffected by any intervening handle-raise pairs ("trivial"
570       or not).  The interactive loop will print that history once it arrives
571       at top level.
572       Short of having all exceptions implicitly carry the full history, the
573       recommended way of using this facility is:
574         - compile your program with instrumentation "on"
575         - run it, when it raises an exception, look at the history
576         - if the history is "cut off" because of some handler, go and modify
577           your program so that it explicitly calls BTrace.trigger
578         - recompile (still instrumented), and rerun; look at the full history
579    
580    ----------------------------------------------------------------------
581    Name: Matthias Blume
582    Date: 2000/07/03 15:36:00 JST
583    Tag: blume-20000702-manual
584    Description:
585    
586    Small corrections and updates to CM manual.
587    
588    ----------------------------------------------------------------------
589    Name: Matthias Blume
590    Date: 2000/06/29 16:04:00 JST
591    Tag: blume-20000629-yacctool
592    Description:
593    
594    Changes:
595    
596    1. Class "mlyacc" now takes separate arguments to pass options to
597       generated .sml- and .sig-files independently.
598    2. Corresponding CM manual updates.
599    3. BTrace module now also reports call sites.  (However, for loop clusters
600       it only shows from where the cluster was entered.)  There are associated
601       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
602    
603    ----------------------------------------------------------------------
604    Name: Matthias Blume
605    Date: 2000/06/27 16:51:00 JST
606    Tag: blume-20000627-noweb
607    Description:
608    
609    Changes:
610    
611     1. Implemented "subdir" and "witness" options for noweb tool.
612        This caused some slight internal changes in CM's tool implementation.
613     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
614        some remaining issues from earlier path anchor changes.
615     3. Updated CM manual accordingly.
616    
617     4. Changed implementation of back-tracing so that I now consider it
618        ready for prime-time.
619    
620        In particular, you don't have to explicitly trigger the back-trace
621        anymore.  Instead, if you are running BTrace-instrumented code and
622        there is an uncaught exception (regardless of whether or not it was
623        raised in instrumented code), the top-level evalloop will print
624        the back-trace.
625    
626        Features:
627    
628          - Instrumented and uninstrumented code work together seemlessly.
629            (Of course, uninstrumented code is never mentioned in actual
630             back-traces.)
631    
632          - Asymptotic time- and space-complexity of instrumented code is
633            equal to that of uninstrumented code.  (This means that
634            tail-recursion is preserved by the instrumentation phase.)
635    
636          - Modules whose code has been instrumented in different sessions
637            work together without problem.
638    
639          - There is no penalty whatsoever on uninstrumented code.
640    
641          - There is no penalty on "raise" expressions, even in
642            instrumented code.
643    
644        A potential bug (or perhaps it is a feature, too):
645    
646          A back-trace reaches no further than the outermost instrumented
647          non-trivial "raise".  Here, a "trivial" raise is one that is the
648          sole RHS of a "handle" rule.  Thus, back-traces reach trough
649    
650               <exp> handle e => raise e
651    
652          and even
653    
654               <exp> handle Foo => raise Bar
655    
656          and, of course, through
657    
658               <exp> handle Foo => ...
659    
660         if the exception was not Foo.
661    
662         Back-traces always reach right through any un-instrumented code
663         including any of its "handle" expressions, trivial or not.
664    
665       To try this out, do the following:
666    
667         - Erase all existing binfiles for your program.
668           (You may keep binfiles for those modules where you think you
669            definitely don't need back-tracing.)
670         - Turn on back-trace instrumentation:
671              SMLofNJ.Internals.BTrace.mode (SOME true);
672         - Recompile your program.  (I.e., run "CM.make" or "use".)
673         - You may now turn instrumentation off again (if you want):
674              SMLofNJ.Internals.BTrace.mode (SOME false);
675         - Run your program as usual.  If it raises an exception that
676           reaches the interactive toplevel, then a back-trace will
677           automatically be printed.  After that, the toplevel loop
678           will print the exception history as usual.
679    
680    ----------------------------------------------------------------------
681    Name: Matthias Blume
682    Date: 2000/06/26 09:56:46 JST
683    Tag: blume-20000626-setup
684    Description:
685    
686    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
687          ML code before and after compiling a file (e.g., to set compiler
688          flags)
689    
690    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
691              - associated changes to btrace.sml (BTrace instrumentation pass)
692              - cleaner implementation of btimp.sml (BTrace tracing and report
693                module)
694    
695    CM manual: * new path encoding documented
696               * description of setup-parameter to "sml" added
697    
698    The biggest user-visible change to back-tracing is that it is no
699    longer necessary to compile all traced modules within the same
700    session.  (This was a real limitation.)
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2000/06/24 12:40:00 JST
705    Tag: blume-20000624-startup
706    Description:
707    
708    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
709    bit too often -- to put it mildly. :)
710    
711    ----------------------------------------------------------------------
712    Name: Matthias Blume
713    Date: 2000/06/23 18:20:00 JST
714    Tag: blume-20000623-btrace
715    Description:
716    
717    This updates adds a backtrace facility to aid programmers in debugging
718    their programs.  This involves the following changes:
719    
720    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
721       keeping track of the current call stack.  When programs are compiled
722       in a special mode, the compiler will insert calls to these hooks
723       into the user program.
724       "Hook" means that it is possible for different implementations of
725       back-tracing to register themselves (at different times).
726    
727    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
728       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
729       It can be turned on using this call:
730         SMLofNJ.Internals.BTrace.mode (SOME true);
731       Turning it off again:
732         SMLofNJ.Internals.BTrace.mode (SOME false);
733       Querying the current status:
734         SMLofNJ.Internals.BTrace.mode NONE;
735       Annotated programs are about twice as big as normal ones, and they
736       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
737       where all hooks do nothing).  The slowdown with a plugin that is
738       actually useful (such as the one supplied by default) is even greater,
739       but in the case of the default plugin it is still only an constant
740       factor (amortized).
741    
742    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
743       with a sub-structure BTrace for controlling back-tracing.  In particular,
744       the above-mentioned function "mode" controls whether the annotation
745       phase is invoked by the compiler.  Another important function is
746       "trigger": when called it aborts the current execution and causes
747       the top-level loop to print a full back-trace.
748    
749    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
750       for back-tracing.  It keeps track of the dynamic call stack and in
751       addition to that it keeps a partial history at each "level" of that
752       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
753       d and b (at separate times, dynamically), then the report will show:
754    
755       GOTO   d
756             /c
757       GOTO  \b
758       CALL   a
759    
760       This shows that there was an initial non-tail call of a, then a
761       tail-call to b or c, looping behavior in a cluster of functions that
762       consist of b and c, and then a goto from that cluster (i.e., either from
763       b or from c) to d.
764    
765       Note that (depending on the user program) the amount of information
766       that the back-trace module has to keep track of at each level is bounded
767       by a constant.  Thus, the whole implementation has the same asymptotical
768       complexity as the original program (both in space and in time).
769    
770    5. compiler/TopLevel/interact/evalloop.sml has been modified to
771       handle the special exception SMLofNJ.Internals.BTrace.BTrace
772       which is raised by the "trigger" function mentioned above.
773    
774    Notes on usage:
775    
776    - Annotated code works well together with unannotated code:
777    Unannotated calls simply do not show up at all in the backtrace.
778    
779    - It is not a good idea to let modules that were annotated during
780    different sessions run at the same time.  This is because the compiler
781    chooses small integers to identify individual functions, and there
782    will be clashes if different modules were compiled in separate sessions.
783    (Nothing will crash, and you will even be told about the clashes, but
784    back-trace information will in general not be useful.)
785    
786    - Back-tracing can be confused by callcc and capture.
787    
788    - The only way of getting a back-trace right now is to explicitly
789    invoke the "trigger" function from your user program.  Eventually, we
790    should make every exception carry back-trace information (if
791    available).  But since this creates more overhead at "raise"-time
792    (similar to the current exnHistory overhead), I have not yet
793    implemented this.  (The implementation will be rather easy.)  With
794    exceptions carrying back-trace information, this facility will be even
795    more useful because users don't need to modify their programs...
796    
797    - While it is possible to compile the compiler with back-trace
798    annotations turned on (I did it to get some confidence in
799    correctness), you must make absolutely sure that core.sml and
800    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
801    be compiled with annotation because there is no core access yet, but
802    if you compile btimp.sml with annotation, then the system will go into
803    an infinite recursion and crash.)
804    Since CM currently does not know about BTrace, the only way to turn
805    annotations on and off for different modules of the compiler is to
806    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
807    this is awkward and clumsy.
808    
809    Sample sessions:
810    
811    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
812    - SMLofNJ.Internals.BTrace.mode (SOME true);
813    [autoloading]
814    [autoloading done]
815    val it = false : bool
816    - structure X = struct
817    -     fun main n = let
818    -         fun a (x, 0) = d x
819    -           | a (x, n) = b (x, n - 1)
820    -         and b (x, n) = c (x, n)
821    -         and c (x, n) = a (x, n)
822    -         and d x = e (x, 3)
823    -         and e (x, 0) = f x
824    -           | e (x, n) = e (x, n - 1)
825    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
826    -           | f n = n * g (n - 1)
827    -         and g n = a (n, 3)
828    -     in
829    -         f n
830    -     end
831    - end;
832    structure X : sig val main : int -> int end
833    - X.main 3;
834    *** BACK-TRACE ***
835    GOTO   stdIn:4.2-13.20: X.main[2].f
836    GOTO-( stdIn:4.2-13.20: X.main[2].e
837    GOTO   stdIn:4.2-13.20: X.main[2].d
838         / stdIn:4.2-13.20: X.main[2].a
839         | stdIn:4.2-13.20: X.main[2].b
840    GOTO-\ stdIn:4.2-13.20: X.main[2].c
841    CALL   stdIn:4.2-13.20: X.main[2].g
842    GOTO   stdIn:4.2-13.20: X.main[2].f
843    GOTO-( stdIn:4.2-13.20: X.main[2].e
844    GOTO   stdIn:4.2-13.20: X.main[2].d
845         / stdIn:4.2-13.20: X.main[2].a
846         | stdIn:4.2-13.20: X.main[2].b
847    GOTO-\ stdIn:4.2-13.20: X.main[2].c
848    CALL   stdIn:4.2-13.20: X.main[2].g
849    GOTO   stdIn:4.2-13.20: X.main[2].f
850    GOTO-( stdIn:4.2-13.20: X.main[2].e
851    GOTO   stdIn:4.2-13.20: X.main[2].d
852         / stdIn:4.2-13.20: X.main[2].a
853         | stdIn:4.2-13.20: X.main[2].b
854    GOTO-\ stdIn:4.2-13.20: X.main[2].c
855    CALL   stdIn:4.2-13.20: X.main[2].g
856    GOTO   stdIn:4.2-13.20: X.main[2].f
857    CALL   stdIn:2.15-17.4: X.main[2]
858    -
859    
860    (Note that because of a FLINt bug the above code currently does not
861    compile without BTrace turned on.)
862    
863    Here is another example, using my modified Tiger compiler:
864    
865    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
866    - SMLofNJ.Internals.BTrace.mode (SOME true);
867    [autoloading]
868    [autoloading done]
869    val it = false : bool
870    - CM.make "sources.cm";
871    [autoloading]
872    ...
873    [autoloading done]
874    [scanning sources.cm]
875    [parsing (sources.cm):parse.sml]
876    [creating directory CM/SKEL ...]
877    [parsing (sources.cm):tiger.lex.sml]
878    ...
879    [wrote CM/sparc-unix/semant.sml]
880    [compiling (sources.cm):main.sml]
881    [wrote CM/sparc-unix/main.sml]
882    [New bindings added.]
883    val it = true : bool
884    - Main.compile ("../testcases/merge.tig", "foo.out");
885    *** BACK-TRACE ***
886    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
887    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
888    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
889    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
890    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
891    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
892    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
893         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
894    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
895    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
896    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
897    CALL   main.sml:1.18-118.4: Main.compile[2]
898    -
899    
900    ----------------------------------------------------------------------
901    Name: Matthias Blumen
902    Date: 2000/06/21 18:00:00 JST
903    Tag: blume-20000621-manual
904    Description:
905    
906    CM manual update: Path environments documented.
907    
908    ----------------------------------------------------------------------
909    Name: Matthias Blume
910    Date: 2000/06/19 13:40:00
911    Tag: blume-20000619-manual
912    Description:
913    
914    CM manual and system/README update.  This only covers the fact that
915    there are no more implicit anchors.  (Path environments and the "bind"
916    option to "cm" have yet to be documented.)
917    
918    ----------------------------------------------------------------------
919    Name: Matthias Blume
920    Date: 2000/06/19 11:05:00 JST
921    Tag: blume-20000619-chdir-bugfix
922    Description:
923    
924    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
925    
926    ----------------------------------------------------------------------
927    Name: Matthias Blume
928    Date: 2000/06/18 22:00:10 JST
929    Tag: blume-20000618-implicit-anchors-really-gone
930    Description:
931    
932    I updates the previous HISTORY entry where I forgot to mention that
933    implicit anchors are no longer with us.
934    
935    The current update also gets rid of the (now useless) controller
936    CM.Control.implicit_anchors.
937    
938    ----------------------------------------------------------------------
939    Name: Matthias Blume
940    Date: 2000/06/16 17:30:00 JST
941    Tag: blume-20000616-anchorenv
942    Description:
943    
944    This patch implements the long anticipated (just kidding :) "anchor
945    environment" mechanism.  In the course of doing this, I also
946    re-implemented CM's internal "SrcPath" module from scratch.  The new
947    one should be more robust in certain boundary cases.  In any case, it
948    is a lot cleaner than its predecessor (IMHO).
949    
950    This time, although there is yet another boot file format change, I
951    kept the unpickler backward-compatible.  As a result, no new bootfiles
952    are necessary and bootstrapping is straightforward.  (You cannot read
953    new bootfiles into an old system, but the other way around is no
954    problem.)
955    
956    Visible changes:
957    
958    ** 0. Implicit path anchors (without the leading $-symbol) are no
959    longer recognized at all. This means that such path names are not
960    illegal either.  For example, the name basis.cm simply refers to a
961    local file called "basis.cm" (i.e, the name is an ordinary path
962    relative to .cm-files directory).  Or, to put it differently, only
963    names that start with $ are anchored paths.
964    
965    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
966    vanished.
967    
968    John (Reppy) had critizised this as soon as I originally proposed and
969    implemented it, but at that time I did not really deeply believe
970    him. :) Now I came full-circle because I need the $<singlearc> syntax
971    in another place where it cannot be seen as an abbreviation for
972    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
973    seems to mean (i.e., it "expands" into the corresponding anchor
974    value).
975    
976    However, when paths are used as members in CM description files, it
977    continues to be true that there must be at least another arc after the
978    anchor.  This is now enforced separately during semantic analysis
979    (i.e., from a lexical/syntactical point of view, the notation is ok.)
980    
981    ** 2. The "cm" class now accepts an option "bind".  The option's value
982    is a sub-option list of precisely two items -- one labeled "anchor"
983    and the other one labeled "value".  As you might expect, "anchor" is
984    used to specify an anchor name to be bound, and "value" specifies what
985    the anchor is being bound to.
986    
987    The value must be a directory name and can be given in either standard
988    syntax (including the possibility that it is itself an anchored path)
989    or native syntax.
990    
991    Examples:
992    
993       foo.cm (bind:(anchor:bar value:$mystuff/bar))
994       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
995    
996    and so on.
997    
998    The meaning of this is that the .cm-file will be processed with an
999    augmented anchor environment where the given anchor(s) is/are bound to
1000    the given values(s).
1001    
1002    The rationale for having this feature is this: Suppose you are trying
1003    to use two different (already stable) libraries a.cm and b.cm (that
1004    you perhaps didn't write yourself).  Further, suppose each of these
1005    two libraries internally uses its own auxiliary library $aux/lib.cm.
1006    Normally you would now have a problem because the anchor "lib" can not
1007    be bound to more than one value globally.  Therefore, the project that
1008    uses both a.cm and b.cm must locally redirect the anchor to some other
1009    place:
1010    
1011       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
1012       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
1013    
1014    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
1015    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
1016    
1017    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
1018    you when you do so at the time of CM.stabilize).  Therefore, you can
1019    also use an anchored path as the value:
1020    
1021      a.cm (bind:(anchor:lib value:$a-lib))
1022      b.cm (bind:(anchor:lib value:$b-lib))
1023    
1024    Now you can globally configure (using the usual CM.Anchor.anchor or
1025    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
1026    itself is always locally bound, setting it globally is no longer
1027    meaningful or necessary (but it does not hurt either).  In fact, "lib"
1028    can still be used as a global anchor for separate purposes.  As a
1029    matter of fact, one can locally define "lib" in terms of a global
1030    "lib":
1031    
1032      a.cm (bind:(anchor:lib value:$lib/a))
1033      b.cm (bind:(anchor:lib value:$lib/b))
1034    
1035    ** 3: The encoding of path names has changed.  This affects the way
1036    path names are shown in CM's progress report and also the internal
1037    protocol encoding used for parallel make.
1038    
1039    The encoding now uses one or more ':'-separated segments.  Each
1040    segments corresponds to a file that has been specified relative to the
1041    file given by its preceding segment.  The first segment is either
1042    relative to the CWD, absolute, or anchored.  Each segment itself is
1043    basically a Unix pathname; all segments but the first are relative.
1044    
1045    Example:
1046    
1047       $foo/bar/baz.cm:a/b/c.sml
1048    
1049    This path denotes the file bar/a/b/c.sml relative to the directory
1050    denoted by anchor "foo".  Notice that the encoding also includes
1051    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
1052    paths are resolved relative to the .cm-files directory, so baz.cm must
1053    be ignored to get the "real" pathname.
1054    
1055    To make this fact more obvious, CM puts the names of such "virtual
1056    arcs" into parentheses when they appear in progress reports. (No
1057    parentheses will appear in the internal protocol encoding.)  Thus,
1058    what you really see is:
1059    
1060      $foo/bar/(baz.cm):a/b/c.sml
1061    
1062    I find this notation to be much more informative than before.
1063    
1064    Another new feature of the encoding is that special characters
1065    including parentheses, colons, (back)slashes, and white space are
1066    written as \ddd (where ddd is the decimal encoding of the character).
1067    
1068    *** The CM manual still needs to be updated.
1069    
1070    ----------------------------------------------------------------------
1071    Name: Allen Leung
1072    Date: 2000/06/15 00:38:00
1073    Tag: leunga-20000615-x86-peephole
1074    
1075    x86 Peephole fix by Fermin.  Affects c-- and moby only.
1076    
1077    ----------------------------------------------------------------------
1078    Name: Matthias Blume
1079    Date: 2000/06/12 11:40:00
1080    Tag: blume-20000612-parmakefix
1081    Description:
1082    
1083    More cleanup after changing the file naming scheme: This time I
1084    repaired the parallel make mechanism for CMB.make which I broke earlier.
1085    
1086    ----------------------------------------------------------------------
1087    Name: Allen Leung
1088    Date: 2000/06/09 01:25:00
1089    Tag: leunga-20000609-various
1090    
1091    None of these things should affect normal SML/NJ operations
1092    
1093    1. Peephole improvements provided by Fermin (c--)
1094    2. New annotation DEFUSE for adding extra dependence (moby)
1095    3. New X86 LOCK instructions (moby)
1096    4. New machine description language for reservation tables (scheduling)
1097    5. Fixes to various optimization/analysis modules (branch chaining, dominator
1098       trees etc.)
1099    6. I've changed the CM files so that they can work with versions
1100       110.0.6, 110.25 and 110.28
1101    
1102    ----------------------------------------------------------------------
1103    Name: Matthias Blume
1104    Date: 2000/06/09 12:40:00
1105    Tag: blume-20000609-log
1106    Description:
1107    
1108    - Removed all(?) remaining RCS Log entries from sources.
1109    
1110    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
1111      anchored paths).
1112    
1113    ----------------------------------------------------------------------
1114    Name: Matthias Blume
1115    Date: 2000/06/07 17:00:00 JST
1116    Tag: blume-20000607-no-implicit-anchors
1117    Description:
1118    
1119    1. This update changes the default setting for
1120    CM.Control.implicit_anchors from true to false.  This means that
1121    implicit anchors are no longer permitted by default.  I also tried to
1122    make sure that nothing else still relies on implicit anchors.
1123    (This is the next step on the schedule towards a CM that does not even
1124    have the notion of implicit anchors anymore.)
1125    
1126    2. More CM manual updates.
1127    
1128    3. I managed to track down and fix the pickling bug I mentioned last
1129    time.  Because of the previously existing workaround, this entails no
1130    immediate practical changes.
1131    
1132    ----------------------------------------------------------------------
1133    Name: Matthias Blume
1134    Date: 2000/06/06 11:15:00 JST
1135    Tag: blume-20000606-lazierpickle
1136    Description:
1137    
1138    !!!! NEW BOOT FILES !!!!
1139    
1140    * The main purpose of this update is to make library pickles lazier in
1141    order to reduce the initial space penalty for autoloading a library.
1142    As a result, it is now possible to have $smlnj/compiler.cm
1143    pre-registered.  This should take care of the many complaints or
1144    inquiries about missing structure Compiler.  This required changes to
1145    CM's internal data structures and small tweaks to some algorithms.
1146    
1147    As a neat additional effect, it is no longer necessary (for the sake
1148    of lean heap image files) to distinguish between a "minimal" CM and a
1149    "full" CM.  Now, there is only one CM (i.e., the "full" version:
1150    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
1151    interactive top level. ($smlnj/cm/minimal.cm is gone.)
1152    
1153    To make the life of compiler-hackers easier, "makeml" now also
1154    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
1155    words, after you bootstrap a new sml for the first time, you will not
1156    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
1157    around you will still have to do it, though.)
1158    
1159    * A second change consists of major updates to the CM manual.  There
1160    are now several appendices with summary information and also a full
1161    specification of the CM description file syntax.
1162    
1163    * In directory src/system I added the script "allcross".  This script
1164    invokes sml and cross-compiles the compiler for all supported
1165    architectures.  (Useful when providing a new set of boot files.)
1166    
1167    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
1168    added a small tweak to pickle-util.sml to work around this problem,
1169    but it is not a proper fix yet.  I will investigate further.  (The
1170    effect of the bug was an inflation of library pickle size.)
1171    
1172    * Version number increased to 110.28.1 (to avoid compatibility problems).
1173    
1174    ----------------------------------------------------------------------
1175    Name: Allen Leung
1176    Date: 2000/05/25 17:28 EDT
1177    Tag: leunga-20000525-ra
1178    Description:
1179    
1180      Fixed a bug in freezing phase of the register allocator.
1181    
1182    ----------------------------------------------------------------------
1183    Name: Allen Leung
1184    Date: 2000/05/15 22:53 EDT
1185    Tag: leunga-20000515-alpha-x86-ra
1186    Description:
1187    
1188      1. Alpha
1189    
1190          Slight cleanup.  Removed the instruction SGNXL
1191    
1192      2. X86
1193    
1194          Added the following instructions to the instruction set:
1195    
1196            ROLx, RORx,
1197            BTx, BTSx, BTLx, BTRx,
1198            XCHGx, and variants with the LOCK prefix
1199    
1200      3. Register Allocation
1201    
1202          The module ra-rewrite-with-renaming has been improved.
1203    
1204      These have no effect on SML/NJ.
1205    
1206    ----------------------------------------------------------------------
1207    Name: Matthias Blume
1208    Date: 2000/05/15 16:20:00 JST
1209    Tag: blume-20000515-lightrebuild
1210    Description:
1211    
1212    1. I added an alternative to "-rebuild" to "makeml".  The difference is
1213       that prior to calling CMB.make' the CM-variable "LIGHT" will be
1214       defined.  In effect, the command will not build any cross-compiler
1215       backends and therefore finish more quickly.
1216    
1217       The "fixpt" script also takes a "-light" switch to be able to use
1218       this new facility while compiling for a fixpoint.
1219    
1220    2. I replaced all mentions of anchored paths in group owner specifications
1221       with simple relative paths (usually starting with "..").
1222       The rationale is that a library's internal workings should not be
1223       compromised by the lack of some anchor.  (An anchor is necessary
1224       for someone who wants to refer to the library by an anchored path,
1225       but it should not be necessary to build the same library in the first
1226       place.)
1227    
1228    3. I changed the way CM's tool mechanism determines the shell command
1229       string used for things like ml-yacc etc. so that it does not break
1230       when CM.Control.implicit_anchors is turned off.
1231    
1232    ----------------------------------------------------------------------
1233    Name: Matthias Blume
1234    Date: 2000/05/12 18:20:00 JST
1235    Tag: blume-20000512-ml-build
1236    Description:
1237    
1238    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
1239    getting installed properly (by config/install.sh).
1240    
1241    ----------------------------------------------------------------------
1242    Name: Matthias Blume
1243    Date: 2000/05/12 17:30:00 JST
1244    Tag: blume-20000512-anchors
1245    Description:
1246    
1247    !!! NEW BOOT FILES !!!
1248    
1249    This change is in preparation of fading out support for "implicitly
1250    anchored path names".  I went through all sources and used the
1251    explicit (and relatively new) $-notation.  See system/README and the
1252    CM manual for more info on this.
1253    
1254    I also modified the anchoring scheme for some things such as "smlnj",
1255    "MLRISC", "cm", etc. to take advantage of the fact that explicit
1256    anchors are more expressive: anchor name and first arc do not have to
1257    coincide.  This entails the following user-visible change:
1258    
1259    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
1260    particular, when you fire up sml with a command-line argument, say,
1261    e.g.:
1262    
1263       sml '$smlnj/cmb.cm'
1264    
1265    At the ML toplevel prompt:
1266    
1267       CM.autoload "$smlnj/cmb.cm";
1268    
1269    There is also a new controller in CM.Control that can be used to turn
1270    off all remaining support for implicit anchors by saying:
1271    
1272        CM.autoload "$smlnj/
1273        #set CM.Control.implicit_anchors false;
1274    
1275    This causes CM to reject implicitly anchored paths.  This is (for the
1276    time being) less permissive than the "final" version where there will
1277    be no more such implicit anchors and relative paths will be just that:
1278    relative.
1279    
1280    The next step (version after next version?) will be to make the
1281    default for CM.Control.implicit_anchors false.  After the dust has
1282    settled, I can then produce the "final" version of this...
1283    
1284    Note: Since bootstrapping is a bit tricky, I provided new boot files.
1285    
1286    ----------------------------------------------------------------------
1287    Name: Matthias Blume
1288    Date: 2000/05/11 16:30:00 JST
1289    Tag: blume-20000511-sources
1290    Description:
1291    
1292    The main change is that I added function CM.sources as a generalized
1293    version of the earlier CM.makedepend.  This entails the following
1294    additional changes:
1295    
1296      - CM.makedepend has been dropped.
1297    
1298      - CM manual has been updated.
1299    
1300      - TOOLS signature and API have been changed.
1301    
1302    ----------------------------------------------------------------------
1303    Name: Allen Leung
1304    Date: 2000/05/10 21:17 EDT
1305    Tag: leunga-20000510-moby-c--ssa
1306    Description:
1307    
1308      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
1309    None of these affect SML/NJ.
1310    
1311    1. Register Allocation
1312    
1313        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
1314           This module tries to remove local (i.e. basic block level) redundancies
1315           during spilling.
1316    
1317        b. A new framework for performing region based register allocation.
1318           Not yet entirely functional.
1319    
1320    2. X86
1321    
1322       a. DefUse for POP was missing the stack pointer [found by Lal]
1323       b. Reload for CALL was incorrect in X86Spill [found by John]
1324       c. Various fixes in X86Spill so that it can be used correctly for
1325          the new spilling module.
1326    
1327    3. SSA/IR
1328    
1329       a. New module ir/dj-dataflow.sml implements elimination based
1330          data flow analysis.
1331    
1332    4. MLRiscGen
1333    
1334       a. Fix for gc type annotation
1335    
1336    5. MDGen
1337    
1338       Various fixes for machine description -> ml code translation.  For ssa
1339       only.
1340    
1341    ----------------------------------------------------------------------
1342    Name: Allen Leung
1343    Date: 2000/05/08 22:17 EDT
1344    Tag: leunga-20000508-labexp
1345    Description:
1346    
1347      Fermin has found a few assembly problems with constant expressions
1348      generated in LabelExp.  Mostly, the problems involve extra parentheses,
1349      which choke on dumb assemblers.  This is his fix.
1350    
1351    ----------------------------------------------------------------------
1352    Name: Dave MacQueen
1353    Date: 2000/04/09 14:00 EDT
1354    Tag: dbm-20000502-Version_110_28
1355    Description:
1356    
1357    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
1358    
1359    2. Updated config/version to 110.28
1360    
1361    3. Updated config/srcarchiveurl
1362    
1363    3. New boot files!
1364       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
1365    
1366    ----------------------------------------------------------------------
1367    Name: Matthias Blume
1368    Date: 2000/05/01 19:05:00 JST
1369    Tag: blume-20000501-noweb
1370    Description:
1371    
1372    A new noweb tool has been added.  The existing system is entirely
1373    unaffected by this, but some CM users have asked for renewed noweb
1374    support.  Everything is documented in the CM manual.
1375    
1376    New (plugin) libraries:
1377    
1378       noweb-tool.cm
1379       nw-ext.cm
1380    
1381    ----------------------------------------------------------------------
1382    Name: Dave MacQueen
1383    Date: 2000/04/30 12:40PM EDT
1384    Tag: dbm-20000430-bug_fixes
1385    Description:
1386    
1387    1. Fix for bug 1498
1388       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
1389       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
1390         added toRealArray function
1391       smlnj/src/compiler/MiscUtil/print/ppobj.sml
1392         added check for tag Obj.RealArray to array printing case in ppObj
1393    
1394    2. Fix for bug 1510
1395       smlnj/src/compiler/Semant/types/typesutil.sml
1396         fixed definition of dummyargs (used by equalTycon) so that
1397         dummy args are distinct types
1398    
1399    ----------------------------------------------------------------------
1400    Name: Matthias Blume
1401    Date: 2000/04/30 01:00:00 JST
1402    Tag: blume-20000430-versions
1403    Description:
1404    
1405    1. CM version numbering added.  This is an implementation of Lal's
1406       proposal for adding version numbers and version checking to .cm
1407       files.  Lal said that his proposal was just that -- a proposal.
1408       For the time being I went ahead and implemented it so that people
1409       can comment on it.  Everything is completely backward-compatible
1410       (except for the stable library format, i.e., new bootfiles!).
1411    
1412       As usual, see the CM manual for details.
1413    
1414    2. An alternative syntax for anchored paths has been implemented.
1415       Dave has recently voiced the same concerns that I had when I did
1416       this, so there should be some support.  My take is that eventually
1417       I will let support for the current syntax (where anchors are
1418       "implicit") fade out in favor of the new, explicit syntax.
1419       In order to be backward-compatible, both old and new syntax are
1420       currently supported.
1421    
1422       Again, see the CM manual for details.
1423    
1424    3. Parallel make is trying to be slightly smarter:  When the master
1425       process finds a "bottleneck", i.e., when there is only one
1426       compilation unit that can be compiled and everybody else is
1427       waiting on it, then it will simply compile it directly instead
1428       of clumsily telling one of the slaves to do it.
1429    
1430    4. Support for "unsharing" added.  This is necessary in order to be
1431       able to have two different versions of the same library running
1432       at the same time (e.g., for trying out a new MLRISC while still
1433       having the old MLRISC linked into the current compiler, etc.)
1434       See the CM manual.
1435    
1436    5. Simple "makedepend" functionality added for generating Makefile
1437       dependency information.  (This is rather crude at the moment.
1438       Expect some changes here in the future.)
1439    
1440    6. ".fun" added as a recognized suffix for ML files. Also documented
1441       explicitly in the manual that the fallback behavior (unknown suffix
1442       -> ML file) is not an official feature!
1443    
1444    7. Small changes to the pickler for stable libraries.
1445    
1446    8. Several internal changes to CM (for cleanup/improvement).
1447    
1448    
1449    !!!! NEW BINFILES !!!!
1450    
1451    ----------------------------------------------------------------------
1452    Name: Matthias Blume
1453    Date: 2000/04/28 17:30:00 JST
1454    Tag: blume-20000428-pathconfig
1455    Description:
1456    
1457    1. I changed config/install.sh to remove duplicate entries from the
1458       lib/pathconfig file at the end.  Moreover, the final version of
1459       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
1460       in src/system/installml.
1461    
1462    2. The config/install.sh script now consistently uses relative
1463       pathnames in lib/pathconfig whenever the anchor is in the lib
1464       directory.  (So far this was true for the libraries that come
1465       pre-compiled and bundled as part of the bootfiles but not for
1466       libraries that are compiled by the script itself.)
1467    
1468    ----------------------------------------------------------------------
1469    Name: Matthias Blume
1470    Date: 2000/04/26 13:10:00 JST
1471    Tag: blume-20000426-fun_suffix
1472    Description:
1473    
1474    Added ".fun" as a recognized file name suffix (for ML code).
1475    
1476    ----------------------------------------------------------------------
1477    Name: Allen Leung
1478    Date: 2000/04/25 17:00:00 EST
1479    Tag: leunga-20000425-alpha-ra
1480    Description:
1481    
1482    1. Alpha
1483    
1484        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
1485    in C--.
1486    
1487    2. RA
1488    
1489       Added a flag "ra-dump-size" to print out the size of the flowgraph
1490       and the interference graph.
1491    
1492    ----------------------------------------------------------------------
1493    Name: Dave MacQueen
1494    Date: 2000/04/25/
1495    Tag: dbm-20000425-mlyacc_doc_examples
1496    Description:
1497      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
1498      Updated all three examples in src/ml-yacc/examples to run
1499      under 110.* using CM.make.
1500    
1501    ----------------------------------------------------------------------
1502    Name: Allen Leung
1503    Date: 2000/04/20 23:04:00 EST
1504    Tag: leunga-20000420-ssa-c---stuff
1505    Description:
1506    
1507      This update synchronizes my repository with Yale's.  Most of these
1508    changes, however, do not affect SML/NJ at all (the RA is an exception).
1509    
1510    1. Register Allocator
1511    
1512       a. An improvement in the interference graph construction:
1513          Given a copy
1514    
1515                s <- t
1516    
1517          no interference edge between s and t is added for this definition of s.
1518    
1519       b. I've added two new spill heuristic modules that Fermin and I developed
1520          (in the new library RA.cm). These are unused in SML/NJ but maybe
1521          useful for others (Moby?)
1522    
1523    2. X86
1524    
1525       a. Various fixes in the backend provided by Fermin [C--] and Lal.
1526    
1527    3. Alpha
1528    
1529       a. Added the BSR instruction and code generation that goes with it [C--]
1530       b. Other fixes too numerous to recount provided by Fermin [C--]
1531    
1532    4. Regmaps
1533    
1534       a. The regmaps are not initialized with the identity physical bindings
1535          at creation time.  This is unneeded.
1536    
1537    5. MLRISC Optimizations
1538    
1539       a. The DJ-Graph module can now compute the iterated dominance frontiers
1540          intersects with liveness incrementally in linear time! Woohoo!
1541          This is now used in my new SSA construction algorithm.
1542    
1543       b. THe branch reorganization module is now smarter about linear chains of
1544          basic blocks.
1545    
1546    
1547    ----------------------------------------------------------------------
1548    Name: Matthias Blume
1549    Date: 2000/04/12 13:52:00 JST
1550    Tag: blume_main_v110p27_1
1551    Description:
1552    
1553    Changed install.sh script to handle archive files without version number
1554    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
1555    name of the boot file archive.
1556    
1557    ----------------------------------------------------------------------
1558    Name: Dave MacQueen
1559    Date: 2000/04/09 14:00 EDT
1560    Tag: dbm-20000410-Version_110_27
1561    Description:
1562    
1563    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
1564    
1565    2. Updated src/config/version to 110.27
1566    
1567    3. New boot files!
1568    
1569    ----------------------------------------------------------------------
1570    Name: Allen Leung
1571    Date: 2000/04/09 19:09:00 EST
1572    Tag: leunga-20000409-misc
1573    Description:
1574    
1575    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
1576    
1577    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
1578    
1579    ----------------------------------------------------------------------
1580    Name: Stefan
1581    Date: 2000/04/07 10:00:00 EDT
1582    Tag: monnier-20000406-branch-handling
1583    Description:
1584    
1585    Improved handling of branches (mostly those generated from
1586    polymorphic equality), removed switchoff and changed the
1587    default optimization settings (more cpsopt and less flintopt).
1588    
1589    ----------------------------------------------------------------------
1590    Name: Allen Leung
1591    Date: 2000/04/06 01:30:00 EST
1592    Tag: leunga-20000406-peephole-x86-SSA-2
1593    Description:
1594    
1595       Forgot a few files.
1596    
1597    ----------------------------------------------------------------------
1598    Name: Allen Leung
1599    Date: 2000/04/06 00:36:00 EST
1600    Tag: leunga-20000406-peephole-x86-SSA
1601    Description:
1602    
1603    1.  New Peephole code
1604    
1605    2.  Minor improvement to X86 instruction selection
1606    
1607    3.  Various fixes to SSA and machine description -> code translator
1608    
1609    ----------------------------------------------------------------------
1610    Name: Matthias Blume
1611    Date: 2000/04/05 12:30:00 JST
1612    Tag: blume_main_v110p26p2_3
1613    Description:
1614    
1615    This update just merges three minor cosmetic updates to CM's sources
1616    to get ready for the 110.27 code freeze on Friday.  No functionality
1617    has changed.
1618    
1619    ----------------------------------------------------------------------
1620    Name: Allen Leung
1621    Date: 2000/04/04 19:39:00 EST
1622    Tag: leunga-20000404-x86-asm
1623    Description:
1624    
1625    1.  Fixed a problem in X86 assembly.
1626    
1627        Things like
1628    
1629           jmp %eax
1630           jmp (%eax)
1631    
1632        should be output as
1633    
1634           jmp *%eax
1635           jmp *(%eax)
1636    
1637    2.  Assembly output
1638    
1639          Added a new flag
1640    
1641              "asm-indent-copies" (default to false)
1642    
1643          When this flag is on, parallel copies will be indented an extra level.
1644    
1645    ----------------------------------------------------------------------
1646    Name: Allen Leung
1647    Date: 2000/04/04 03:18:00 EST
1648    Tag: leunga-20000404-C--Moby
1649    Description:
1650    
1651        All of these fixes are related to C--, Moby, and my own optimization
1652        stuff; so they shouldn't affect SML/NJ.
1653    
1654    1.  X86
1655    
1656        Various fixes related floating point, and extensions.
1657    
1658    2.  Alpha
1659    
1660        Some extra patterns related to loads with signed/zero extension
1661        provided by Fermin.
1662    
1663    3.  Assembly
1664    
1665        When generating assembly, resolve the value of client defined constants,
1666        instead of generating symbolic values.  This is controlled by the
1667        new flag "asm-resolve-constants", which is default to true.
1668    
1669    4.  Machine Descriptions
1670    
1671        a. The precedence parser was slightly broken when parsing infixr symbols.
1672        b. The type generalizing code had the bound variables reversed, resulting
1673           in a problem during arity raising.
1674        c. Various fixes in machine descriptions.
1675    
1676    ----------------------------------------------------------------------
1677    Name: Matthias Blume
1678    Date: 2000/04/03 16:05:00 JST
1679    Tag: blume_main_v110p26p2_2
1680    Description:
1681    
1682    I eliminated coreEnv from compInfo.  Access to the "Core" structure is
1683    now done via the ordinary static environment that is context to each
1684    compilation unit.
1685    
1686    To this end, I arranged that instead of "structure Core" as "structure
1687    _Core" is bound in the pervasive environment.  Core access is done via
1688    _Core (which can never be accidentally rebound because _Core is not a
1689    legal surface-syntax symbol).
1690    
1691    The current solution is much cleaner because the core environment is
1692    now simply part of the pervasive environment which is part of every
1693    compilation unit's context anyway.  In particular, this eliminates all
1694    special-case handling that was necessary until now in order to deal
1695    with dynamic and symbolic parts of the core environment.
1696    
1697    Remaining hackery (to bind the "magic" symbol _Core) is localized in the
1698    compilation manager's bootstrap compiler (actually: in the "init group"
1699    handling).  See the comments in src/system/smlnj/init/init.cmi for
1700    more details.
1701    
1702    I also tried to track down all mentions of "Core" (as string argument
1703    to Symbol.strSymbol) in the compiler and replaced them with a
1704    reference to the new CoreSym.coreSym.  Seems cleaner since the actual
1705    name appears in one place only.
1706    
1707    Binfile and bootfile format have not changed, but the switchover from
1708    the old "init.cmi" to the new one is a bit tricky, so I supplied new
1709    bootfiles anyway.
1710    
1711    ----------------------------------------------------------------------
1712    Name: Allen Leung
1713    Date: 2000/04/02 21:17:00 EST
1714    Tag: leunga-20000402-mltree
1715    Description:
1716    
1717       1. Renamed the constructor CALL in MLTREE by popular demand.
1718       2. Added a bunch of files from my repository.  These are currently
1719          used by other non-SMLNJ backends.
1720    
1721    ----------------------------------------------------------------------
1722    Name: Allen Leung
1723    Date: 2000/03/31 21:15:00 EST
1724    Tag: leunga-20000331-aliasing
1725    Description:
1726    
1727    This update contains a rewritten (and hopefully more correct) module
1728    for extracting aliasing information from CPS.
1729    
1730       To turn on this feature:
1731    
1732            Compiler.Control.CG.memDisambiguate := true
1733    
1734       To pretty print the region information with assembly
1735    
1736           Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
1737    
1738       To control how many levels of aliasing information are printed, use:
1739    
1740           Compiler.Control.MLRISC.getInt "points-to-show-level" := n
1741    
1742       The default of n is 3.
1743    
1744    ----------------------------------------------------------------------
1745    Name: David MacQueen
1746    Date: 2000/03/31 11:15:00 EST
1747    Tag: dbm-20000331-runtime_fix
1748    Description:
1749    
1750    This update contains:
1751    
1752    1. runtime/c-lib/c-libraries.c
1753       includes added in revision 1.2 caused compilation errors on hppa-hpux
1754    
1755    2. fix for bug 1556
1756       system/Basis/Implementation/NJ/internal-signals.sml
1757    
1758  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1759  Name: Matthias Blume  Name: Matthias Blume
# Line 67  Line 1810 
1810     (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
1811     used).     used).
1812    
1813     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
1814     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
1815     Makefiles or Shell scripts.     Makefiles or Shell scripts.
1816    
1817     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 80  Line 1823 
1823    
1824     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
1825    
1826     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
1827     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
1828    
1829  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 214  Line 1957 
1957    
1958       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
1959       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
1960       testl is perferable to andl.       testl is preferable to andl.
1961    
1962  7. RA (x86 only)  7. RA (x86 only)
1963    
# Line 396  Line 2139 
2139    
2140  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
2141  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
2142  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
2143  explanation.  explanation.
2144    
2145  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
2146  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
2147  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
2148  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 443  Line 2186 
2186  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
2187  <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,
2188  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
2189  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
2190  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
2191  and, thus, saves a lot of time.  and, thus, saves a lot of time.
2192    
# Line 493  Line 2236 
2236    it from that remote directory.    it from that remote directory.
2237    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
2238    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
2239    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
2240    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
2241    
2242    For CVS users, this mechanism is not relevant for source archives, but    For CVS users, this mechanism is not relevant for source archives, but

Legend:
Removed from v.588  
changed lines
  Added in v.772

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0