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 586, Thu Mar 30 05:08:07 2000 UTC revision 695, Mon Aug 7 23:57:38 2000 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: Allen Leung
16    Date: 2000/08/7 19:31:00
17    Tag: leunga-20000807-a-whole-bunch-of-stuff
18    
19      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
20    and Mobdy.
21    
22    1.  x86
23    
24       a.  Fixes to peephole module by John and Dan.
25       b.  Assembly fix to SETcc by Allen.
26       c.  Fix to c-call by John.
27       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
28       e.  Instruction selection optimization to SETcc as suggested by John.
29    
30           For example,
31    
32            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
33    
34           should generate:
35    
36            MOVL a, x
37            SUBL b, x
38            SHRL 31, x
39    
40    2.  IR stuff
41    
42         A bunch of new DJ-graph related algorithms added.  These
43         speed up SSA construction.
44    
45    3.  SSA + Scheduling
46    
47         Added code for SSA and scheduling to the repository
48    
49    ----------------------------------------------------------------------
50    Name: Lal George
51    Date: 2000/07/27 11:53:14 EDT
52    
53    Tag: lal-20000727-linux-ppc
54    Description:
55    
56     Made changes to support Linux PPC.
57     p.s. I have confirmation that the 110.29 boot files work fine.
58    
59    ----------------------------------------------------------------------
60    Name: Matthias Blume
61    Date: 2000/07/27 17:40:00 JST
62    Tag: blume-20000727-scripts
63    Description:
64    
65    !!!! WARNING !!!!
66    You must recompile the runtime system!
67    !!!! WARNING !!!!
68    
69    This is basically another round of script-enhancements:
70    
71    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
72       and undefine CM preprocessor symbols.
73    
74    2. ml-build avoids generating a new heap image if it finds that the
75       existing one is still ok.  (The condition is that no ML file had to
76       be recompiled and all ML files are found to be older that the heap
77       file.)
78    
79       To make this work smoothly, I also hacked the runtime system as
80       well as SMLofNJ.SysInfo to get access to the heap image suffix
81       (.sparc-solaris, ...) that is currently being used.
82    
83       Moreover, the signature of CM.mk_standalone has changed.  See the
84       CM manual.
85    
86    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
87       CM manual for details.)
88    
89    4. More CM manual updates:
90        - all of the above has been documented.
91        - there is now a section describing the (CM-related) command line
92          arguments that are accepted by the "sml" command
93    
94    ----------------------------------------------------------------------
95    Name: Matthias Blume
96    Date: 2000/07/25 16:20:00 JST
97    Tag: blume-20000725-makedepend
98    Description:
99    
100    Added a script called ml-makedepend.  This can be used in makefiles
101    for Unix' make in a way very similar to the "makedepend" command for
102    C.
103    
104    The script internally uses function CM.sources.
105    
106    Synopsis:
107    
108        ml-makedepend [-f makefile] cmfile targetname
109    
110    The default for the makefile is "makefile" (or "Makefile" should
111    "makefile" not exist).
112    
113    ml-makedepend adds a cmfile/targetname-specific section to this
114    makefile (after removing the previous version of this section).  The
115    section contains a single dependency specification with targetname on
116    the LHS (targetname is an arbitrary name), and a list of files derived
117    from the cmfile on the RHS.  Some of the files on the RHS are
118    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
119    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
120    path names.  The makefile writer is responsible for making sure that
121    these variables have correct at the time "make" is invoked.
122    
123    ----------------------------------------------------------------------
124    Name: Matthias Blume
125    Date: 2000/07/22 23:30:00 JST
126    Tag: blume-20000722-urlupdate
127    Description:
128    
129    Changed BOOT and config/srcarchiveurl to point to BL server:
130    
131        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
132    
133    ----------------------------------------------------------------------
134    Name: Matthias Blume
135    Date: 2000/07/18 18:00:00 JST
136    Tag: blume-20000718-Version_110_29
137    Description:
138    
139    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
140    
141    2. Updated config/version to 110.29
142    
143    3. Updated config/srcarchiveurl
144    
145    3. New boot files!
146       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
147    
148    ----------------------------------------------------------------------
149    Name: Matthias Blume
150    Date: 2000/07/11 13:58:00 JST
151    Tag: blume-20000711-doctypo
152    Description:
153    
154    Fixed a few typos in CM manual.
155    
156    ----------------------------------------------------------------------
157    Name: Allen Leung
158    Date: 2000/06/15 00:38:00
159    Tag: leunga-20000704-sparc-x86
160    
161    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
162    2. fix to x86 RET bug [found by Dan Grossman]
163    3. sparc assembly bug fix for ticc instructions [found by Fermin]
164    
165       Affects c-- and moby only
166    
167    ----------------------------------------------------------------------
168    Name: Matthias Blume
169    Date: 2000/07/04 15:26:00
170    Tag: blume-20000704-trigger
171    Description:
172    
173    1. Improvements to CM manual.
174    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
175       of getting a back-trace.  The function, when called, raises an
176       internal exception which explicitly carries the full back-trace history,
177       so it is unaffected by any intervening handle-raise pairs ("trivial"
178       or not).  The interactive loop will print that history once it arrives
179       at top level.
180       Short of having all exceptions implicitly carry the full history, the
181       recommended way of using this facility is:
182         - compile your program with instrumentation "on"
183         - run it, when it raises an exception, look at the history
184         - if the history is "cut off" because of some handler, go and modify
185           your program so that it explicitly calls BTrace.trigger
186         - recompile (still instrumented), and rerun; look at the full history
187    
188    ----------------------------------------------------------------------
189    Name: Matthias Blume
190    Date: 2000/07/03 15:36:00 JST
191    Tag: blume-20000702-manual
192    Description:
193    
194    Small corrections and updates to CM manual.
195    
196    ----------------------------------------------------------------------
197    Name: Matthias Blume
198    Date: 2000/06/29 16:04:00 JST
199    Tag: blume-20000629-yacctool
200    Description:
201    
202    Changes:
203    
204    1. Class "mlyacc" now takes separate arguments to pass options to
205       generated .sml- and .sig-files independently.
206    2. Corresponding CM manual updates.
207    3. BTrace module now also reports call sites.  (However, for loop clusters
208       it only shows from where the cluster was entered.)  There are associated
209       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
210    
211    ----------------------------------------------------------------------
212    Name: Matthias Blume
213    Date: 2000/06/27 16:51:00 JST
214    Tag: blume-20000627-noweb
215    Description:
216    
217    Changes:
218    
219     1. Implemented "subdir" and "witness" options for noweb tool.
220        This caused some slight internal changes in CM's tool implementation.
221     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
222        some remaining issues from earlier path anchor changes.
223     3. Updated CM manual accordingly.
224    
225     4. Changed implementation of back-tracing so that I now consider it
226        ready for prime-time.
227    
228        In particular, you don't have to explicitly trigger the back-trace
229        anymore.  Instead, if you are running BTrace-instrumented code and
230        there is an uncaught exception (regardless of whether or not it was
231        raised in instrumented code), the top-level evalloop will print
232        the back-trace.
233    
234        Features:
235    
236          - Instrumented and uninstrumented code work together seemlessly.
237            (Of course, uninstrumented code is never mentioned in actual
238             back-traces.)
239    
240          - Asymptotic time- and space-complexity of instrumented code is
241            equal to that of uninstrumented code.  (This means that
242            tail-recursion is preserved by the instrumentation phase.)
243    
244          - Modules whose code has been instrumented in different sessions
245            work together without problem.
246    
247          - There is no penalty whatsoever on uninstrumented code.
248    
249          - There is no penalty on "raise" expressions, even in
250            instrumented code.
251    
252        A potential bug (or perhaps it is a feature, too):
253    
254          A back-trace reaches no further than the outermost instrumented
255          non-trivial "raise".  Here, a "trivial" raise is one that is the
256          sole RHS of a "handle" rule.  Thus, back-traces reach trough
257    
258               <exp> handle e => raise e
259    
260          and even
261    
262               <exp> handle Foo => raise Bar
263    
264          and, of course, through
265    
266               <exp> handle Foo => ...
267    
268         if the exception was not Foo.
269    
270         Back-traces always reach right through any un-instrumented code
271         including any of its "handle" expressions, trivial or not.
272    
273       To try this out, do the following:
274    
275         - Erase all existing binfiles for your program.
276           (You may keep binfiles for those modules where you think you
277            definitely don't need back-tracing.)
278         - Turn on back-trace instrumentation:
279              SMLofNJ.Internals.BTrace.mode (SOME true);
280         - Recompile your program.  (I.e., run "CM.make" or "use".)
281         - You may now turn instrumentation off again (if you want):
282              SMLofNJ.Internals.BTrace.mode (SOME false);
283         - Run your program as usual.  If it raises an exception that
284           reaches the interactive toplevel, then a back-trace will
285           automatically be printed.  After that, the toplevel loop
286           will print the exception history as usual.
287    
288    ----------------------------------------------------------------------
289    Name: Matthias Blume
290    Date: 2000/06/26 09:56:46 JST
291    Tag: blume-20000626-setup
292    Description:
293    
294    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
295          ML code before and after compiling a file (e.g., to set compiler
296          flags)
297    
298    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
299              - associated changes to btrace.sml (BTrace instrumentation pass)
300              - cleaner implementation of btimp.sml (BTrace tracing and report
301                module)
302    
303    CM manual: * new path encoding documented
304               * description of setup-parameter to "sml" added
305    
306    The biggest user-visible change to back-tracing is that it is no
307    longer necessary to compile all traced modules within the same
308    session.  (This was a real limitation.)
309    
310    ----------------------------------------------------------------------
311    Name: Matthias Blume
312    Date: 2000/06/24 12:40:00 JST
313    Tag: blume-20000624-startup
314    Description:
315    
316    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
317    bit too often -- to put it mildly. :)
318    
319    ----------------------------------------------------------------------
320    Name: Matthias Blume
321    Date: 2000/06/23 18:20:00 JST
322    Tag: blume-20000623-btrace
323    Description:
324    
325    This updates adds a backtrace facility to aid programmers in debugging
326    their programs.  This involves the following changes:
327    
328    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
329       keeping track of the current call stack.  When programs are compiled
330       in a special mode, the compiler will insert calls to these hooks
331       into the user program.
332       "Hook" means that it is possible for different implementations of
333       back-tracing to register themselves (at different times).
334    
335    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
336       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
337       It can be turned on using this call:
338         SMLofNJ.Internals.BTrace.mode (SOME true);
339       Turning it off again:
340         SMLofNJ.Internals.BTrace.mode (SOME false);
341       Querying the current status:
342         SMLofNJ.Internals.BTrace.mode NONE;
343       Annotated programs are about twice as big as normal ones, and they
344       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
345       where all hooks do nothing).  The slowdown with a plugin that is
346       actually useful (such as the one supplied by default) is even greater,
347       but in the case of the default plugin it is still only an constant
348       factor (amortized).
349    
350    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
351       with a sub-structure BTrace for controlling back-tracing.  In particular,
352       the above-mentioned function "mode" controls whether the annotation
353       phase is invoked by the compiler.  Another important function is
354       "trigger": when called it aborts the current execution and causes
355       the top-level loop to print a full back-trace.
356    
357    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
358       for back-tracing.  It keeps track of the dynamic call stack and in
359       addition to that it keeps a partial history at each "level" of that
360       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
361       d and b (at separate times, dynamically), then the report will show:
362    
363       GOTO   d
364             /c
365       GOTO  \b
366       CALL   a
367    
368       This shows that there was an initial non-tail call of a, then a
369       tail-call to b or c, looping behavior in a cluster of functions that
370       consist of b and c, and then a goto from that cluster (i.e., either from
371       b or from c) to d.
372    
373       Note that (depending on the user program) the amount of information
374       that the back-trace module has to keep track of at each level is bounded
375       by a constant.  Thus, the whole implementation has the same asymptotical
376       complexity as the original program (both in space and in time).
377    
378    5. compiler/TopLevel/interact/evalloop.sml has been modified to
379       handle the special exception SMLofNJ.Internals.BTrace.BTrace
380       which is raised by the "trigger" function mentioned above.
381    
382    Notes on usage:
383    
384    - Annotated code works well together with unannotated code:
385    Unannotated calls simply do not show up at all in the backtrace.
386    
387    - It is not a good idea to let modules that were annotated during
388    different sessions run at the same time.  This is because the compiler
389    chooses small integers to identify individual functions, and there
390    will be clashes if different modules were compiled in separate sessions.
391    (Nothing will crash, and you will even be told about the clashes, but
392    back-trace information will in general not be useful.)
393    
394    - Back-tracing can be confused by callcc and capture.
395    
396    - The only way of getting a back-trace right now is to explicitly
397    invoke the "trigger" function from your user program.  Eventually, we
398    should make every exception carry back-trace information (if
399    available).  But since this creates more overhead at "raise"-time
400    (similar to the current exnHistory overhead), I have not yet
401    implemented this.  (The implementation will be rather easy.)  With
402    exceptions carrying back-trace information, this facility will be even
403    more useful because users don't need to modify their programs...
404    
405    - While it is possible to compile the compiler with back-trace
406    annotations turned on (I did it to get some confidence in
407    correctness), you must make absolutely sure that core.sml and
408    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
409    be compiled with annotation because there is no core access yet, but
410    if you compile btimp.sml with annotation, then the system will go into
411    an infinite recursion and crash.)
412    Since CM currently does not know about BTrace, the only way to turn
413    annotations on and off for different modules of the compiler is to
414    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
415    this is awkward and clumsy.
416    
417    Sample sessions:
418    
419    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
420    - SMLofNJ.Internals.BTrace.mode (SOME true);
421    [autoloading]
422    [autoloading done]
423    val it = false : bool
424    - structure X = struct
425    -     fun main n = let
426    -         fun a (x, 0) = d x
427    -           | a (x, n) = b (x, n - 1)
428    -         and b (x, n) = c (x, n)
429    -         and c (x, n) = a (x, n)
430    -         and d x = e (x, 3)
431    -         and e (x, 0) = f x
432    -           | e (x, n) = e (x, n - 1)
433    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
434    -           | f n = n * g (n - 1)
435    -         and g n = a (n, 3)
436    -     in
437    -         f n
438    -     end
439    - end;
440    structure X : sig val main : int -> int end
441    - X.main 3;
442    *** BACK-TRACE ***
443    GOTO   stdIn:4.2-13.20: X.main[2].f
444    GOTO-( stdIn:4.2-13.20: X.main[2].e
445    GOTO   stdIn:4.2-13.20: X.main[2].d
446         / stdIn:4.2-13.20: X.main[2].a
447         | stdIn:4.2-13.20: X.main[2].b
448    GOTO-\ stdIn:4.2-13.20: X.main[2].c
449    CALL   stdIn:4.2-13.20: X.main[2].g
450    GOTO   stdIn:4.2-13.20: X.main[2].f
451    GOTO-( stdIn:4.2-13.20: X.main[2].e
452    GOTO   stdIn:4.2-13.20: X.main[2].d
453         / stdIn:4.2-13.20: X.main[2].a
454         | stdIn:4.2-13.20: X.main[2].b
455    GOTO-\ stdIn:4.2-13.20: X.main[2].c
456    CALL   stdIn:4.2-13.20: X.main[2].g
457    GOTO   stdIn:4.2-13.20: X.main[2].f
458    GOTO-( stdIn:4.2-13.20: X.main[2].e
459    GOTO   stdIn:4.2-13.20: X.main[2].d
460         / stdIn:4.2-13.20: X.main[2].a
461         | stdIn:4.2-13.20: X.main[2].b
462    GOTO-\ stdIn:4.2-13.20: X.main[2].c
463    CALL   stdIn:4.2-13.20: X.main[2].g
464    GOTO   stdIn:4.2-13.20: X.main[2].f
465    CALL   stdIn:2.15-17.4: X.main[2]
466    -
467    
468    (Note that because of a FLINt bug the above code currently does not
469    compile without BTrace turned on.)
470    
471    Here is another example, using my modified Tiger compiler:
472    
473    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
474    - SMLofNJ.Internals.BTrace.mode (SOME true);
475    [autoloading]
476    [autoloading done]
477    val it = false : bool
478    - CM.make "sources.cm";
479    [autoloading]
480    ...
481    [autoloading done]
482    [scanning sources.cm]
483    [parsing (sources.cm):parse.sml]
484    [creating directory CM/SKEL ...]
485    [parsing (sources.cm):tiger.lex.sml]
486    ...
487    [wrote CM/sparc-unix/semant.sml]
488    [compiling (sources.cm):main.sml]
489    [wrote CM/sparc-unix/main.sml]
490    [New bindings added.]
491    val it = true : bool
492    - Main.compile ("../testcases/merge.tig", "foo.out");
493    *** BACK-TRACE ***
494    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
495    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
496    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
497    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
498    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
499    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
500    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
501         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
502    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
503    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
504    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
505    CALL   main.sml:1.18-118.4: Main.compile[2]
506    -
507    
508    ----------------------------------------------------------------------
509    Name: Matthias Blumen
510    Date: 2000/06/21 18:00:00 JST
511    Tag: blume-20000621-manual
512    Description:
513    
514    CM manual update: Path environments documented.
515    
516    ----------------------------------------------------------------------
517    Name: Matthias Blume
518    Date: 2000/06/19 13:40:00
519    Tag: blume-20000619-manual
520    Description:
521    
522    CM manual and system/README update.  This only covers the fact that
523    there are no more implicit anchors.  (Path environments and the "bind"
524    option to "cm" have yet to be documented.)
525    
526    ----------------------------------------------------------------------
527    Name: Matthias Blume
528    Date: 2000/06/19 11:05:00 JST
529    Tag: blume-20000619-chdir-bugfix
530    Description:
531    
532    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
533    
534    ----------------------------------------------------------------------
535    Name: Matthias Blume
536    Date: 2000/06/18 22:00:10 JST
537    Tag: blume-20000618-implicit-anchors-really-gone
538    Description:
539    
540    I updates the previous HISTORY entry where I forgot to mention that
541    implicit anchors are no longer with us.
542    
543    The current update also gets rid of the (now useless) controller
544    CM.Control.implicit_anchors.
545    
546    ----------------------------------------------------------------------
547    Name: Matthias Blume
548    Date: 2000/06/16 17:30:00 JST
549    Tag: blume-20000616-anchorenv
550    Description:
551    
552    This patch implements the long anticipated (just kidding :) "anchor
553    environment" mechanism.  In the course of doing this, I also
554    re-implemented CM's internal "SrcPath" module from scratch.  The new
555    one should be more robust in certain boundary cases.  In any case, it
556    is a lot cleaner than its predecessor (IMHO).
557    
558    This time, although there is yet another boot file format change, I
559    kept the unpickler backward-compatible.  As a result, no new bootfiles
560    are necessary and bootstrapping is straightforward.  (You cannot read
561    new bootfiles into an old system, but the other way around is no
562    problem.)
563    
564    Visible changes:
565    
566    ** 0. Implicit path anchors (without the leading $-symbol) are no
567    longer recognized at all. This means that such path names are not
568    illegal either.  For example, the name basis.cm simply refers to a
569    local file called "basis.cm" (i.e, the name is an ordinary path
570    relative to .cm-files directory).  Or, to put it differently, only
571    names that start with $ are anchored paths.
572    
573    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
574    vanished.
575    
576    John (Reppy) had critizised this as soon as I originally proposed and
577    implemented it, but at that time I did not really deeply believe
578    him. :) Now I came full-circle because I need the $<singlearc> syntax
579    in another place where it cannot be seen as an abbreviation for
580    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
581    seems to mean (i.e., it "expands" into the corresponding anchor
582    value).
583    
584    However, when paths are used as members in CM description files, it
585    continues to be true that there must be at least another arc after the
586    anchor.  This is now enforced separately during semantic analysis
587    (i.e., from a lexical/syntactical point of view, the notation is ok.)
588    
589    ** 2. The "cm" class now accepts an option "bind".  The option's value
590    is a sub-option list of precisely two items -- one labeled "anchor"
591    and the other one labeled "value".  As you might expect, "anchor" is
592    used to specify an anchor name to be bound, and "value" specifies what
593    the anchor is being bound to.
594    
595    The value must be a directory name and can be given in either standard
596    syntax (including the possibility that it is itself an anchored path)
597    or native syntax.
598    
599    Examples:
600    
601       foo.cm (bind:(anchor:bar value:$mystuff/bar))
602       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
603    
604    and so on.
605    
606    The meaning of this is that the .cm-file will be processed with an
607    augmented anchor environment where the given anchor(s) is/are bound to
608    the given values(s).
609    
610    The rationale for having this feature is this: Suppose you are trying
611    to use two different (already stable) libraries a.cm and b.cm (that
612    you perhaps didn't write yourself).  Further, suppose each of these
613    two libraries internally uses its own auxiliary library $aux/lib.cm.
614    Normally you would now have a problem because the anchor "lib" can not
615    be bound to more than one value globally.  Therefore, the project that
616    uses both a.cm and b.cm must locally redirect the anchor to some other
617    place:
618    
619       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
620       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
621    
622    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
623    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
624    
625    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
626    you when you do so at the time of CM.stabilize).  Therefore, you can
627    also use an anchored path as the value:
628    
629      a.cm (bind:(anchor:lib value:$a-lib))
630      b.cm (bind:(anchor:lib value:$b-lib))
631    
632    Now you can globally configure (using the usual CM.Anchor.anchor or
633    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
634    itself is always locally bound, setting it globally is no longer
635    meaningful or necessary (but it does not hurt either).  In fact, "lib"
636    can still be used as a global anchor for separate purposes.  As a
637    matter of fact, one can locally define "lib" in terms of a global
638    "lib":
639    
640      a.cm (bind:(anchor:lib value:$lib/a))
641      b.cm (bind:(anchor:lib value:$lib/b))
642    
643    ** 3: The encoding of path names has changed.  This affects the way
644    path names are shown in CM's progress report and also the internal
645    protocol encoding used for parallel make.
646    
647    The encoding now uses one or more ':'-separated segments.  Each
648    segments corresponds to a file that has been specified relative to the
649    file given by its preceding segment.  The first segment is either
650    relative to the CWD, absolute, or anchored.  Each segment itself is
651    basically a Unix pathname; all segments but the first are relative.
652    
653    Example:
654    
655       $foo/bar/baz.cm:a/b/c.sml
656    
657    This path denotes the file bar/a/b/c.sml relative to the directory
658    denoted by anchor "foo".  Notice that the encoding also includes
659    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
660    paths are resolved relative to the .cm-files directory, so baz.cm must
661    be ignored to get the "real" pathname.
662    
663    To make this fact more obvious, CM puts the names of such "virtual
664    arcs" into parentheses when they appear in progress reports. (No
665    parentheses will appear in the internal protocol encoding.)  Thus,
666    what you really see is:
667    
668      $foo/bar/(baz.cm):a/b/c.sml
669    
670    I find this notation to be much more informative than before.
671    
672    Another new feature of the encoding is that special characters
673    including parentheses, colons, (back)slashes, and white space are
674    written as \ddd (where ddd is the decimal encoding of the character).
675    
676    *** The CM manual still needs to be updated.
677    
678    ----------------------------------------------------------------------
679    Name: Allen Leung
680    Date: 2000/06/15 00:38:00
681    Tag: leunga-20000615-x86-peephole
682    
683    x86 Peephole fix by Fermin.  Affects c-- and moby only.
684    
685    ----------------------------------------------------------------------
686    Name: Matthias Blume
687    Date: 2000/06/12 11:40:00
688    Tag: blume-20000612-parmakefix
689    Description:
690    
691    More cleanup after changing the file naming scheme: This time I
692    repaired the parallel make mechanism for CMB.make which I broke earlier.
693    
694    ----------------------------------------------------------------------
695    Name: Allen Leung
696    Date: 2000/06/09 01:25:00
697    Tag: leunga-20000609-various
698    
699    None of these things should affect normal SML/NJ operations
700    
701    1. Peephole improvements provided by Fermin (c--)
702    2. New annotation DEFUSE for adding extra dependence (moby)
703    3. New X86 LOCK instructions (moby)
704    4. New machine description language for reservation tables (scheduling)
705    5. Fixes to various optimization/analysis modules (branch chaining, dominator
706       trees etc.)
707    6. I've changed the CM files so that they can work with versions
708       110.0.6, 110.25 and 110.28
709    
710    ----------------------------------------------------------------------
711    Name: Matthias Blume
712    Date: 2000/06/09 12:40:00
713    Tag: blume-20000609-log
714    Description:
715    
716    - Removed all(?) remaining RCS Log entries from sources.
717    
718    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
719      anchored paths).
720    
721    ----------------------------------------------------------------------
722    Name: Matthias Blume
723    Date: 2000/06/07 17:00:00 JST
724    Tag: blume-20000607-no-implicit-anchors
725    Description:
726    
727    1. This update changes the default setting for
728    CM.Control.implicit_anchors from true to false.  This means that
729    implicit anchors are no longer permitted by default.  I also tried to
730    make sure that nothing else still relies on implicit anchors.
731    (This is the next step on the schedule towards a CM that does not even
732    have the notion of implicit anchors anymore.)
733    
734    2. More CM manual updates.
735    
736    3. I managed to track down and fix the pickling bug I mentioned last
737    time.  Because of the previously existing workaround, this entails no
738    immediate practical changes.
739    
740    ----------------------------------------------------------------------
741    Name: Matthias Blume
742    Date: 2000/06/06 11:15:00 JST
743    Tag: blume-20000606-lazierpickle
744    Description:
745    
746    !!!! NEW BOOT FILES !!!!
747    
748    * The main purpose of this update is to make library pickles lazier in
749    order to reduce the initial space penalty for autoloading a library.
750    As a result, it is now possible to have $smlnj/compiler.cm
751    pre-registered.  This should take care of the many complaints or
752    inquiries about missing structure Compiler.  This required changes to
753    CM's internal data structures and small tweaks to some algorithms.
754    
755    As a neat additional effect, it is no longer necessary (for the sake
756    of lean heap image files) to distinguish between a "minimal" CM and a
757    "full" CM.  Now, there is only one CM (i.e., the "full" version:
758    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
759    interactive top level. ($smlnj/cm/minimal.cm is gone.)
760    
761    To make the life of compiler-hackers easier, "makeml" now also
762    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
763    words, after you bootstrap a new sml for the first time, you will not
764    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
765    around you will still have to do it, though.)
766    
767    * A second change consists of major updates to the CM manual.  There
768    are now several appendices with summary information and also a full
769    specification of the CM description file syntax.
770    
771    * In directory src/system I added the script "allcross".  This script
772    invokes sml and cross-compiles the compiler for all supported
773    architectures.  (Useful when providing a new set of boot files.)
774    
775    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
776    added a small tweak to pickle-util.sml to work around this problem,
777    but it is not a proper fix yet.  I will investigate further.  (The
778    effect of the bug was an inflation of library pickle size.)
779    
780    * Version number increased to 110.28.1 (to avoid compatibility problems).
781    
782    ----------------------------------------------------------------------
783    Name: Allen Leung
784    Date: 2000/05/25 17:28 EDT
785    Tag: leunga-20000525-ra
786    Description:
787    
788      Fixed a bug in freezing phase of the register allocator.
789    
790    ----------------------------------------------------------------------
791    Name: Allen Leung
792    Date: 2000/05/15 22:53 EDT
793    Tag: leunga-20000515-alpha-x86-ra
794    Description:
795    
796      1. Alpha
797    
798          Slight cleanup.  Removed the instruction SGNXL
799    
800      2. X86
801    
802          Added the following instructions to the instruction set:
803    
804            ROLx, RORx,
805            BTx, BTSx, BTLx, BTRx,
806            XCHGx, and variants with the LOCK prefix
807    
808      3. Register Allocation
809    
810          The module ra-rewrite-with-renaming has been improved.
811    
812      These have no effect on SML/NJ.
813    
814    ----------------------------------------------------------------------
815    Name: Matthias Blume
816    Date: 2000/05/15 16:20:00 JST
817    Tag: blume-20000515-lightrebuild
818    Description:
819    
820    1. I added an alternative to "-rebuild" to "makeml".  The difference is
821       that prior to calling CMB.make' the CM-variable "LIGHT" will be
822       defined.  In effect, the command will not build any cross-compiler
823       backends and therefore finish more quickly.
824    
825       The "fixpt" script also takes a "-light" switch to be able to use
826       this new facility while compiling for a fixpoint.
827    
828    2. I replaced all mentions of anchored paths in group owner specifications
829       with simple relative paths (usually starting with "..").
830       The rationale is that a library's internal workings should not be
831       compromised by the lack of some anchor.  (An anchor is necessary
832       for someone who wants to refer to the library by an anchored path,
833       but it should not be necessary to build the same library in the first
834       place.)
835    
836    3. I changed the way CM's tool mechanism determines the shell command
837       string used for things like ml-yacc etc. so that it does not break
838       when CM.Control.implicit_anchors is turned off.
839    
840    ----------------------------------------------------------------------
841    Name: Matthias Blume
842    Date: 2000/05/12 18:20:00 JST
843    Tag: blume-20000512-ml-build
844    Description:
845    
846    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
847    getting installed properly (by config/install.sh).
848    
849    ----------------------------------------------------------------------
850    Name: Matthias Blume
851    Date: 2000/05/12 17:30:00 JST
852    Tag: blume-20000512-anchors
853    Description:
854    
855    !!! NEW BOOT FILES !!!
856    
857    This change is in preparation of fading out support for "implicitly
858    anchored path names".  I went through all sources and used the
859    explicit (and relatively new) $-notation.  See system/README and the
860    CM manual for more info on this.
861    
862    I also modified the anchoring scheme for some things such as "smlnj",
863    "MLRISC", "cm", etc. to take advantage of the fact that explicit
864    anchors are more expressive: anchor name and first arc do not have to
865    coincide.  This entails the following user-visible change:
866    
867    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
868    particular, when you fire up sml with a command-line argument, say,
869    e.g.:
870    
871       sml '$smlnj/cmb.cm'
872    
873    At the ML toplevel prompt:
874    
875       CM.autoload "$smlnj/cmb.cm";
876    
877    There is also a new controller in CM.Control that can be used to turn
878    off all remaining support for implicit anchors by saying:
879    
880        CM.autoload "$smlnj/
881        #set CM.Control.implicit_anchors false;
882    
883    This causes CM to reject implicitly anchored paths.  This is (for the
884    time being) less permissive than the "final" version where there will
885    be no more such implicit anchors and relative paths will be just that:
886    relative.
887    
888    The next step (version after next version?) will be to make the
889    default for CM.Control.implicit_anchors false.  After the dust has
890    settled, I can then produce the "final" version of this...
891    
892    Note: Since bootstrapping is a bit tricky, I provided new boot files.
893    
894    ----------------------------------------------------------------------
895    Name: Matthias Blume
896    Date: 2000/05/11 16:30:00 JST
897    Tag: blume-20000511-sources
898    Description:
899    
900    The main change is that I added function CM.sources as a generalized
901    version of the earlier CM.makedepend.  This entails the following
902    additional changes:
903    
904      - CM.makedepend has been dropped.
905    
906      - CM manual has been updated.
907    
908      - TOOLS signature and API have been changed.
909    
910    ----------------------------------------------------------------------
911    Name: Allen Leung
912    Date: 2000/05/10 21:17 EDT
913    Tag: leunga-20000510-moby-c--ssa
914    Description:
915    
916      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
917    None of these affect SML/NJ.
918    
919    1. Register Allocation
920    
921        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
922           This module tries to remove local (i.e. basic block level) redundancies
923           during spilling.
924    
925        b. A new framework for performing region based register allocation.
926           Not yet entirely functional.
927    
928    2. X86
929    
930       a. DefUse for POP was missing the stack pointer [found by Lal]
931       b. Reload for CALL was incorrect in X86Spill [found by John]
932       c. Various fixes in X86Spill so that it can be used correctly for
933          the new spilling module.
934    
935    3. SSA/IR
936    
937       a. New module ir/dj-dataflow.sml implements elimination based
938          data flow analysis.
939    
940    4. MLRiscGen
941    
942       a. Fix for gc type annotation
943    
944    5. MDGen
945    
946       Various fixes for machine description -> ml code translation.  For ssa
947       only.
948    
949    ----------------------------------------------------------------------
950    Name: Allen Leung
951    Date: 2000/05/08 22:17 EDT
952    Tag: leunga-20000508-labexp
953    Description:
954    
955      Fermin has found a few assembly problems with constant expressions
956      generated in LabelExp.  Mostly, the problems involve extra parentheses,
957      which choke on dumb assemblers.  This is his fix.
958    
959    ----------------------------------------------------------------------
960    Name: Dave MacQueen
961    Date: 2000/04/09 14:00 EDT
962    Tag: dbm-20000502-Version_110_28
963    Description:
964    
965    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
966    
967    2. Updated config/version to 110.28
968    
969    3. Updated config/srcarchiveurl
970    
971    3. New boot files!
972       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
973    
974    ----------------------------------------------------------------------
975    Name: Matthias Blume
976    Date: 2000/05/01 19:05:00 JST
977    Tag: blume-20000501-noweb
978    Description:
979    
980    A new noweb tool has been added.  The existing system is entirely
981    unaffected by this, but some CM users have asked for renewed noweb
982    support.  Everything is documented in the CM manual.
983    
984    New (plugin) libraries:
985    
986       noweb-tool.cm
987       nw-ext.cm
988    
989    ----------------------------------------------------------------------
990    Name: Dave MacQueen
991    Date: 2000/04/30 12:40PM EDT
992    Tag: dbm-20000430-bug_fixes
993    Description:
994    
995    1. Fix for bug 1498
996       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
997       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
998         added toRealArray function
999       smlnj/src/compiler/MiscUtil/print/ppobj.sml
1000         added check for tag Obj.RealArray to array printing case in ppObj
1001    
1002    2. Fix for bug 1510
1003       smlnj/src/compiler/Semant/types/typesutil.sml
1004         fixed definition of dummyargs (used by equalTycon) so that
1005         dummy args are distinct types
1006    
1007    ----------------------------------------------------------------------
1008    Name: Matthias Blume
1009    Date: 2000/04/30 01:00:00 JST
1010    Tag: blume-20000430-versions
1011    Description:
1012    
1013    1. CM version numbering added.  This is an implementation of Lal's
1014       proposal for adding version numbers and version checking to .cm
1015       files.  Lal said that his proposal was just that -- a proposal.
1016       For the time being I went ahead and implemented it so that people
1017       can comment on it.  Everything is completely backward-compatible
1018       (except for the stable library format, i.e., new bootfiles!).
1019    
1020       As usual, see the CM manual for details.
1021    
1022    2. An alternative syntax for anchored paths has been implemented.
1023       Dave has recently voiced the same concerns that I had when I did
1024       this, so there should be some support.  My take is that eventually
1025       I will let support for the current syntax (where anchors are
1026       "implicit") fade out in favor of the new, explicit syntax.
1027       In order to be backward-compatible, both old and new syntax are
1028       currently supported.
1029    
1030       Again, see the CM manual for details.
1031    
1032    3. Parallel make is trying to be slightly smarter:  When the master
1033       process finds a "bottleneck", i.e., when there is only one
1034       compilation unit that can be compiled and everybody else is
1035       waiting on it, then it will simply compile it directly instead
1036       of clumsily telling one of the slaves to do it.
1037    
1038    4. Support for "unsharing" added.  This is necessary in order to be
1039       able to have two different versions of the same library running
1040       at the same time (e.g., for trying out a new MLRISC while still
1041       having the old MLRISC linked into the current compiler, etc.)
1042       See the CM manual.
1043    
1044    5. Simple "makedepend" functionality added for generating Makefile
1045       dependency information.  (This is rather crude at the moment.
1046       Expect some changes here in the future.)
1047    
1048    6. ".fun" added as a recognized suffix for ML files. Also documented
1049       explicitly in the manual that the fallback behavior (unknown suffix
1050       -> ML file) is not an official feature!
1051    
1052    7. Small changes to the pickler for stable libraries.
1053    
1054    8. Several internal changes to CM (for cleanup/improvement).
1055    
1056    
1057    !!!! NEW BINFILES !!!!
1058    
1059    ----------------------------------------------------------------------
1060    Name: Matthias Blume
1061    Date: 2000/04/28 17:30:00 JST
1062    Tag: blume-20000428-pathconfig
1063    Description:
1064    
1065    1. I changed config/install.sh to remove duplicate entries from the
1066       lib/pathconfig file at the end.  Moreover, the final version of
1067       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
1068       in src/system/installml.
1069    
1070    2. The config/install.sh script now consistently uses relative
1071       pathnames in lib/pathconfig whenever the anchor is in the lib
1072       directory.  (So far this was true for the libraries that come
1073       pre-compiled and bundled as part of the bootfiles but not for
1074       libraries that are compiled by the script itself.)
1075    
1076    ----------------------------------------------------------------------
1077    Name: Matthias Blume
1078    Date: 2000/04/26 13:10:00 JST
1079    Tag: blume-20000426-fun_suffix
1080    Description:
1081    
1082    Added ".fun" as a recognized file name suffix (for ML code).
1083    
1084    ----------------------------------------------------------------------
1085    Name: Allen Leung
1086    Date: 2000/04/25 17:00:00 EST
1087    Tag: leunga-20000425-alpha-ra
1088    Description:
1089    
1090    1. Alpha
1091    
1092        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
1093    in C--.
1094    
1095    2. RA
1096    
1097       Added a flag "ra-dump-size" to print out the size of the flowgraph
1098       and the interference graph.
1099    
1100    ----------------------------------------------------------------------
1101    Name: Dave MacQueen
1102    Date: 2000/04/25/
1103    Tag: dbm-20000425-mlyacc_doc_examples
1104    Description:
1105      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
1106      Updated all three examples in src/ml-yacc/examples to run
1107      under 110.* using CM.make.
1108    
1109    ----------------------------------------------------------------------
1110    Name: Allen Leung
1111    Date: 2000/04/20 23:04:00 EST
1112    Tag: leunga-20000420-ssa-c---stuff
1113    Description:
1114    
1115      This update synchronizes my repository with Yale's.  Most of these
1116    changes, however, do not affect SML/NJ at all (the RA is an exception).
1117    
1118    1. Register Allocator
1119    
1120       a. An improvement in the interference graph construction:
1121          Given a copy
1122    
1123                s <- t
1124    
1125          no interference edge between s and t is added for this definition of s.
1126    
1127       b. I've added two new spill heuristic modules that Fermin and I developed
1128          (in the new library RA.cm). These are unused in SML/NJ but maybe
1129          useful for others (Moby?)
1130    
1131    2. X86
1132    
1133       a. Various fixes in the backend provided by Fermin [C--] and Lal.
1134    
1135    3. Alpha
1136    
1137       a. Added the BSR instruction and code generation that goes with it [C--]
1138       b. Other fixes too numerous to recount provided by Fermin [C--]
1139    
1140    4. Regmaps
1141    
1142       a. The regmaps are not initialized with the identity physical bindings
1143          at creation time.  This is unneeded.
1144    
1145    5. MLRISC Optimizations
1146    
1147       a. The DJ-Graph module can now compute the iterated dominance frontiers
1148          intersects with liveness incrementally in linear time! Woohoo!
1149          This is now used in my new SSA construction algorithm.
1150    
1151       b. THe branch reorganization module is now smarter about linear chains of
1152          basic blocks.
1153    
1154    
1155    ----------------------------------------------------------------------
1156    Name: Matthias Blume
1157    Date: 2000/04/12 13:52:00 JST
1158    Tag: blume_main_v110p27_1
1159    Description:
1160    
1161    Changed install.sh script to handle archive files without version number
1162    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
1163    name of the boot file archive.
1164    
1165    ----------------------------------------------------------------------
1166    Name: Dave MacQueen
1167    Date: 2000/04/09 14:00 EDT
1168    Tag: dbm-20000410-Version_110_27
1169    Description:
1170    
1171    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
1172    
1173    2. Updated src/config/version to 110.27
1174    
1175    3. New boot files!
1176    
1177    ----------------------------------------------------------------------
1178    Name: Allen Leung
1179    Date: 2000/04/09 19:09:00 EST
1180    Tag: leunga-20000409-misc
1181    Description:
1182    
1183    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
1184    
1185    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
1186    
1187    ----------------------------------------------------------------------
1188    Name: Stefan
1189    Date: 2000/04/07 10:00:00 EDT
1190    Tag: monnier-20000406-branch-handling
1191    Description:
1192    
1193    Improved handling of branches (mostly those generated from
1194    polymorphic equality), removed switchoff and changed the
1195    default optimization settings (more cpsopt and less flintopt).
1196    
1197    ----------------------------------------------------------------------
1198    Name: Allen Leung
1199    Date: 2000/04/06 01:30:00 EST
1200    Tag: leunga-20000406-peephole-x86-SSA-2
1201    Description:
1202    
1203       Forgot a few files.
1204    
1205    ----------------------------------------------------------------------
1206    Name: Allen Leung
1207    Date: 2000/04/06 00:36:00 EST
1208    Tag: leunga-20000406-peephole-x86-SSA
1209    Description:
1210    
1211    1.  New Peephole code
1212    
1213    2.  Minor improvement to X86 instruction selection
1214    
1215    3.  Various fixes to SSA and machine description -> code translator
1216    
1217    ----------------------------------------------------------------------
1218    Name: Matthias Blume
1219    Date: 2000/04/05 12:30:00 JST
1220    Tag: blume_main_v110p26p2_3
1221    Description:
1222    
1223    This update just merges three minor cosmetic updates to CM's sources
1224    to get ready for the 110.27 code freeze on Friday.  No functionality
1225    has changed.
1226    
1227    ----------------------------------------------------------------------
1228    Name: Allen Leung
1229    Date: 2000/04/04 19:39:00 EST
1230    Tag: leunga-20000404-x86-asm
1231    Description:
1232    
1233    1.  Fixed a problem in X86 assembly.
1234    
1235        Things like
1236    
1237           jmp %eax
1238           jmp (%eax)
1239    
1240        should be output as
1241    
1242           jmp *%eax
1243           jmp *(%eax)
1244    
1245    2.  Assembly output
1246    
1247          Added a new flag
1248    
1249              "asm-indent-copies" (default to false)
1250    
1251          When this flag is on, parallel copies will be indented an extra level.
1252    
1253    ----------------------------------------------------------------------
1254    Name: Allen Leung
1255    Date: 2000/04/04 03:18:00 EST
1256    Tag: leunga-20000404-C--Moby
1257    Description:
1258    
1259        All of these fixes are related to C--, Moby, and my own optimization
1260        stuff; so they shouldn't affect SML/NJ.
1261    
1262    1.  X86
1263    
1264        Various fixes related floating point, and extensions.
1265    
1266    2.  Alpha
1267    
1268        Some extra patterns related to loads with signed/zero extension
1269        provided by Fermin.
1270    
1271    3.  Assembly
1272    
1273        When generating assembly, resolve the value of client defined constants,
1274        instead of generating symbolic values.  This is controlled by the
1275        new flag "asm-resolve-constants", which is default to true.
1276    
1277    4.  Machine Descriptions
1278    
1279        a. The precedence parser was slightly broken when parsing infixr symbols.
1280        b. The type generalizing code had the bound variables reversed, resulting
1281           in a problem during arity raising.
1282        c. Various fixes in machine descriptions.
1283    
1284    ----------------------------------------------------------------------
1285    Name: Matthias Blume
1286    Date: 2000/04/03 16:05:00 JST
1287    Tag: blume_main_v110p26p2_2
1288    Description:
1289    
1290    I eliminated coreEnv from compInfo.  Access to the "Core" structure is
1291    now done via the ordinary static environment that is context to each
1292    compilation unit.
1293    
1294    To this end, I arranged that instead of "structure Core" as "structure
1295    _Core" is bound in the pervasive environment.  Core access is done via
1296    _Core (which can never be accidentally rebound because _Core is not a
1297    legal surface-syntax symbol).
1298    
1299    The current solution is much cleaner because the core environment is
1300    now simply part of the pervasive environment which is part of every
1301    compilation unit's context anyway.  In particular, this eliminates all
1302    special-case handling that was necessary until now in order to deal
1303    with dynamic and symbolic parts of the core environment.
1304    
1305    Remaining hackery (to bind the "magic" symbol _Core) is localized in the
1306    compilation manager's bootstrap compiler (actually: in the "init group"
1307    handling).  See the comments in src/system/smlnj/init/init.cmi for
1308    more details.
1309    
1310    I also tried to track down all mentions of "Core" (as string argument
1311    to Symbol.strSymbol) in the compiler and replaced them with a
1312    reference to the new CoreSym.coreSym.  Seems cleaner since the actual
1313    name appears in one place only.
1314    
1315    Binfile and bootfile format have not changed, but the switchover from
1316    the old "init.cmi" to the new one is a bit tricky, so I supplied new
1317    bootfiles anyway.
1318    
1319    ----------------------------------------------------------------------
1320    Name: Allen Leung
1321    Date: 2000/04/02 21:17:00 EST
1322    Tag: leunga-20000402-mltree
1323    Description:
1324    
1325       1. Renamed the constructor CALL in MLTREE by popular demand.
1326       2. Added a bunch of files from my repository.  These are currently
1327          used by other non-SMLNJ backends.
1328    
1329    ----------------------------------------------------------------------
1330    Name: Allen Leung
1331    Date: 2000/03/31 21:15:00 EST
1332    Tag: leunga-20000331-aliasing
1333    Description:
1334    
1335    This update contains a rewritten (and hopefully more correct) module
1336    for extracting aliasing information from CPS.
1337    
1338       To turn on this feature:
1339    
1340            Compiler.Control.CG.memDisambiguate := true
1341    
1342       To pretty print the region information with assembly
1343    
1344           Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
1345    
1346       To control how many levels of aliasing information are printed, use:
1347    
1348           Compiler.Control.MLRISC.getInt "points-to-show-level" := n
1349    
1350       The default of n is 3.
1351    
1352    ----------------------------------------------------------------------
1353    Name: David MacQueen
1354    Date: 2000/03/31 11:15:00 EST
1355    Tag: dbm-20000331-runtime_fix
1356    Description:
1357    
1358    This update contains:
1359    
1360    1. runtime/c-lib/c-libraries.c
1361       includes added in revision 1.2 caused compilation errors on hppa-hpux
1362    
1363    2. fix for bug 1556
1364       system/Basis/Implementation/NJ/internal-signals.sml
1365    
1366    ----------------------------------------------------------------------
1367    Name: Matthias Blume
1368    Date: 2000/03/31 18:00:00 JST
1369    Tag: blume_main_v110p26p2_1
1370    Description:
1371    
1372    This update contains:
1373    
1374    1. A small change to CM's handling of stable libraries:
1375       CM now maintains one "global" modmap that is used for all stable
1376       libraries.  The use of such a global modmap maximizes sharing and
1377       minimizes the need for re-traversing parts of environments during
1378       modmap construction.  (However, this has minor impact since modmap
1379       construction seems to account for just one percent or less of total
1380       compile time.)
1381    
1382    2. I added a "genmap" phase to the statistics.  This is where I got the
1383       "one percent" number (see above).
1384    
1385    3. CM's new tool parameter mechanism just became _even_ better. :)
1386       - The parser understands named parameters and recursive options.
1387       - The "make" and "shell" tools use these new features.
1388         (This makes it a lot easier to cascade these tools.)
1389       - There is a small syntax change: named parameters use a
1390    
1391           <name> : ( <option> ... )            or
1392           <name> : <string>
1393    
1394         syntax.  Previously, named parameters were implemented in an
1395         ad-hoc fashion by each tool individually (by parsing strings)
1396         and had the form
1397    
1398           <name>=<string>
1399    
1400       See the CM manual for a full description of these issues.
1401    
1402    ----------------------------------------------------------------------
1403    Name: Matthias Blume
1404    Date: 2000/03/30 18:00:00 JST
1405    Tag: blume_main_v110p26p2_0
1406    Description:
1407    
1408    !!!!! WARNING !!!!!!
1409    !!  New binfiles  !!
1410    !!!!!!!!!!!!!!!!!!!!
1411    
1412    This update contains:
1413    
1414    1. Moderate changes to CM:
1415    
1416       - Changes to CM's tools mechanism.  In particular, it is now possible
1417       to have tools that accept additional "command line" parameters
1418       (specified in the .cm file at each instance where the tool's class is
1419       used).
1420    
1421       This was done to accommodate the new "make" and "shell" tools which
1422       facilitate fairly seamless hookup to portions of code managed using
1423       Makefiles or Shell scripts.
1424    
1425       There are no classes "shared" or "private" anymore.  Instead, the
1426       sharing annotation is now a parameter to the "sml" class.
1427    
1428       There is a bit of generic machinery for implementing one's own
1429       tools that accept command-line parameters.  However, I am not yet fully
1430       satisfied with that part, so expect changes here in the future.
1431    
1432       All existing tools are described in the CM manual.
1433    
1434       - Slightly better error handling.  (CM now suppresses many followup
1435       error messages that tended to be more annoying than helpful.)
1436    
1437    2. Major changes to the compiler's static environment data structures.
1438    
1439       - no CMStaticEnv anymore.
1440            - no CMEnv, no "BareEnvironment" (actually, _only_ BareEnvironment,
1441              but it is called Environment), no conversions between different
1442              kinds of static environments
1443    
1444       - There is still a notion of a "modmap", but such modmaps are generated
1445         on demand at the time when they are needed.  This sounds slow, but I
1446         sped up the code that generates modmaps enough for this not to lead to
1447         a slowdown of the compiler (at least I didn't detect any).
1448    
1449       - To facilitate rapid modmap generation, static environments now
1450         contain an (optional) "modtree" structure.  Modtree annotations are
1451         constructed by the unpickler during unpickling.  (This means that
1452         the elaborator does not have to worry about modtrees at all.)
1453         Modtrees have the advantage that they are compositional in the same
1454         way as the environment data structure itself is compositional.
1455         As a result, modtrees never hang on to parts of an environment that
1456         has already been rendered "stale" by filtering or rebinding.
1457    
1458       - I went through many, many trials and errors before arriving at the
1459         current solution.  (The initial idea of "linkpaths" did not work.)
1460         But the result of all this is that I have touched a lot of files that
1461         depend on the "modules" and "types" data structures (most of the
1462         elaborator). There were a lot of changes during my "linkpath" trials
1463         that could have been reverted to their original state but weren't.
1464         Please, don't be too harsh on me for messing with this code a bit more
1465         than what was strictly necessary...  (I _did_ resist the tempation
1466         of doing any "global reformatting" to avoid an untimely death at
1467         Dave's hands. :)
1468    
1469       - One positive aspect of the previous point:  At least I made sure that
1470         all files that I touched now compile without warnings (other than
1471         "polyEqual").
1472    
1473       - compiler now tends to run "leaner" (i.e., ties up less memory in
1474         redundant modmaps)
1475    
1476  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1477  Name: Allen Leung  Name: Allen Leung
# Line 104  Line 1565 
1565    
1566       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
1567       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
1568       testl is perferable to andl.       testl is preferable to andl.
1569    
1570  7. RA (x86 only)  7. RA (x86 only)
1571    
# Line 286  Line 1747 
1747    
1748  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
1749  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
1750  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
1751  explanation.  explanation.
1752    
1753  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
1754  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
1755  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
1756  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 333  Line 1794 
1794  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
1795  <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,
1796  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
1797  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
1798  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
1799  and, thus, saves a lot of time.  and, thus, saves a lot of time.
1800    
# Line 383  Line 1844 
1844    it from that remote directory.    it from that remote directory.
1845    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
1846    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
1847    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
1848    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
1849    
1850    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.586  
changed lines
  Added in v.695

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