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revision 647, Tue May 16 02:53:02 2000 UTC revision 686, Tue Jul 18 08:58:50 2000 UTC
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12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14  ----------------------------------------------------------------------  ----------------------------------------------------------------------
15    Name: Matthias Blume
16    Date: 2000/07/18 18:00:00 JST
17    Tag: blume-20000718-Version_110_29
18    Description:
20    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
22    2. Updated config/version to 110.29
24    3. Updated config/srcarchiveurl
26    3. New boot files!
27       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
29    ----------------------------------------------------------------------
30    Name: Matthias Blume
31    Date: 2000/07/11 13:58:00 JST
32    Tag: blume-20000711-doctypo
33    Description:
35    Fixed a few typos in CM manual.
37    ----------------------------------------------------------------------
38    Name: Allen Leung
39    Date: 2000/06/15 00:38:00
40    Tag: leunga-20000704-sparc-x86
42    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
43    2. fix to x86 RET bug [found by Dan Grossman]
44    3. sparc assembly bug fix for ticc instructions [found by Fermin]
46       Affects c-- and moby only
48    ----------------------------------------------------------------------
49    Name: Matthias Blume
50    Date: 2000/07/04 15:26:00
51    Tag: blume-20000704-trigger
52    Description:
54    1. Improvements to CM manual.
55    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
56       of getting a back-trace.  The function, when called, raises an
57       internal exception which explicitly carries the full back-trace history,
58       so it is unaffected by any intervening handle-raise pairs ("trivial"
59       or not).  The interactive loop will print that history once it arrives
60       at top level.
61       Short of having all exceptions implicitly carry the full history, the
62       recommended way of using this facility is:
63         - compile your program with instrumentation "on"
64         - run it, when it raises an exception, look at the history
65         - if the history is "cut off" because of some handler, go and modify
66           your program so that it explicitly calls BTrace.trigger
67         - recompile (still instrumented), and rerun; look at the full history
69    ----------------------------------------------------------------------
70    Name: Matthias Blume
71    Date: 2000/07/03 15:36:00 JST
72    Tag: blume-20000702-manual
73    Description:
75    Small corrections and updates to CM manual.
77    ----------------------------------------------------------------------
78    Name: Matthias Blume
79    Date: 2000/06/29 16:04:00 JST
80    Tag: blume-20000629-yacctool
81    Description:
83    Changes:
85    1. Class "mlyacc" now takes separate arguments to pass options to
86       generated .sml- and .sig-files independently.
87    2. Corresponding CM manual updates.
88    3. BTrace module now also reports call sites.  (However, for loop clusters
89       it only shows from where the cluster was entered.)  There are associated
90       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
92    ----------------------------------------------------------------------
93    Name: Matthias Blume
94    Date: 2000/06/27 16:51:00 JST
95    Tag: blume-20000627-noweb
96    Description:
98    Changes:
100     1. Implemented "subdir" and "witness" options for noweb tool.
101        This caused some slight internal changes in CM's tool implementation.
102     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
103        some remaining issues from earlier path anchor changes.
104     3. Updated CM manual accordingly.
106     4. Changed implementation of back-tracing so that I now consider it
107        ready for prime-time.
109        In particular, you don't have to explicitly trigger the back-trace
110        anymore.  Instead, if you are running BTrace-instrumented code and
111        there is an uncaught exception (regardless of whether or not it was
112        raised in instrumented code), the top-level evalloop will print
113        the back-trace.
115        Features:
117          - Instrumented and uninstrumented code work together seemlessly.
118            (Of course, uninstrumented code is never mentioned in actual
119             back-traces.)
121          - Asymptotic time- and space-complexity of instrumented code is
122            equal to that of uninstrumented code.  (This means that
123            tail-recursion is preserved by the instrumentation phase.)
125          - Modules whose code has been instrumented in different sessions
126            work together without problem.
128          - There is no penalty whatsoever on uninstrumented code.
130          - There is no penalty on "raise" expressions, even in
131            instrumented code.
133        A potential bug (or perhaps it is a feature, too):
135          A back-trace reaches no further than the outermost instrumented
136          non-trivial "raise".  Here, a "trivial" raise is one that is the
137          sole RHS of a "handle" rule.  Thus, back-traces reach trough
139               <exp> handle e => raise e
141          and even
143               <exp> handle Foo => raise Bar
145          and, of course, through
147               <exp> handle Foo => ...
149         if the exception was not Foo.
151         Back-traces always reach right through any un-instrumented code
152         including any of its "handle" expressions, trivial or not.
154       To try this out, do the following:
156         - Erase all existing binfiles for your program.
157           (You may keep binfiles for those modules where you think you
158            definitely don't need back-tracing.)
159         - Turn on back-trace instrumentation:
160              SMLofNJ.Internals.BTrace.mode (SOME true);
161         - Recompile your program.  (I.e., run "CM.make" or "use".)
162         - You may now turn instrumentation off again (if you want):
163              SMLofNJ.Internals.BTrace.mode (SOME false);
164         - Run your program as usual.  If it raises an exception that
165           reaches the interactive toplevel, then a back-trace will
166           automatically be printed.  After that, the toplevel loop
167           will print the exception history as usual.
169    ----------------------------------------------------------------------
170    Name: Matthias Blume
171    Date: 2000/06/26 09:56:46 JST
172    Tag: blume-20000626-setup
173    Description:
175    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
176          ML code before and after compiling a file (e.g., to set compiler
177          flags)
179    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
180              - associated changes to btrace.sml (BTrace instrumentation pass)
181              - cleaner implementation of btimp.sml (BTrace tracing and report
182                module)
184    CM manual: * new path encoding documented
185               * description of setup-parameter to "sml" added
187    The biggest user-visible change to back-tracing is that it is no
188    longer necessary to compile all traced modules within the same
189    session.  (This was a real limitation.)
191    ----------------------------------------------------------------------
192    Name: Matthias Blume
193    Date: 2000/06/24 12:40:00 JST
194    Tag: blume-20000624-startup
195    Description:
197    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
198    bit too often -- to put it mildly. :)
200    ----------------------------------------------------------------------
201    Name: Matthias Blume
202    Date: 2000/06/23 18:20:00 JST
203    Tag: blume-20000623-btrace
204    Description:
206    This updates adds a backtrace facility to aid programmers in debugging
207    their programs.  This involves the following changes:
209    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
210       keeping track of the current call stack.  When programs are compiled
211       in a special mode, the compiler will insert calls to these hooks
212       into the user program.
213       "Hook" means that it is possible for different implementations of
214       back-tracing to register themselves (at different times).
216    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
217       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
218       It can be turned on using this call:
219         SMLofNJ.Internals.BTrace.mode (SOME true);
220       Turning it off again:
221         SMLofNJ.Internals.BTrace.mode (SOME false);
222       Querying the current status:
223         SMLofNJ.Internals.BTrace.mode NONE;
224       Annotated programs are about twice as big as normal ones, and they
225       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
226       where all hooks do nothing).  The slowdown with a plugin that is
227       actually useful (such as the one supplied by default) is even greater,
228       but in the case of the default plugin it is still only an constant
229       factor (amortized).
231    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
232       with a sub-structure BTrace for controlling back-tracing.  In particular,
233       the above-mentioned function "mode" controls whether the annotation
234       phase is invoked by the compiler.  Another important function is
235       "trigger": when called it aborts the current execution and causes
236       the top-level loop to print a full back-trace.
238    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
239       for back-tracing.  It keeps track of the dynamic call stack and in
240       addition to that it keeps a partial history at each "level" of that
241       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
242       d and b (at separate times, dynamically), then the report will show:
244       GOTO   d
245             /c
246       GOTO  \b
247       CALL   a
249       This shows that there was an initial non-tail call of a, then a
250       tail-call to b or c, looping behavior in a cluster of functions that
251       consist of b and c, and then a goto from that cluster (i.e., either from
252       b or from c) to d.
254       Note that (depending on the user program) the amount of information
255       that the back-trace module has to keep track of at each level is bounded
256       by a constant.  Thus, the whole implementation has the same asymptotical
257       complexity as the original program (both in space and in time).
259    5. compiler/TopLevel/interact/evalloop.sml has been modified to
260       handle the special exception SMLofNJ.Internals.BTrace.BTrace
261       which is raised by the "trigger" function mentioned above.
263    Notes on usage:
265    - Annotated code works well together with unannotated code:
266    Unannotated calls simply do not show up at all in the backtrace.
268    - It is not a good idea to let modules that were annotated during
269    different sessions run at the same time.  This is because the compiler
270    chooses small integers to identify individual functions, and there
271    will be clashes if different modules were compiled in separate sessions.
272    (Nothing will crash, and you will even be told about the clashes, but
273    back-trace information will in general not be useful.)
275    - Back-tracing can be confused by callcc and capture.
277    - The only way of getting a back-trace right now is to explicitly
278    invoke the "trigger" function from your user program.  Eventually, we
279    should make every exception carry back-trace information (if
280    available).  But since this creates more overhead at "raise"-time
281    (similar to the current exnHistory overhead), I have not yet
282    implemented this.  (The implementation will be rather easy.)  With
283    exceptions carrying back-trace information, this facility will be even
284    more useful because users don't need to modify their programs...
286    - While it is possible to compile the compiler with back-trace
287    annotations turned on (I did it to get some confidence in
288    correctness), you must make absolutely sure that core.sml and
289    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
290    be compiled with annotation because there is no core access yet, but
291    if you compile btimp.sml with annotation, then the system will go into
292    an infinite recursion and crash.)
293    Since CM currently does not know about BTrace, the only way to turn
294    annotations on and off for different modules of the compiler is to
295    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
296    this is awkward and clumsy.
298    Sample sessions:
300    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
301    - SMLofNJ.Internals.BTrace.mode (SOME true);
302    [autoloading]
303    [autoloading done]
304    val it = false : bool
305    - structure X = struct
306    -     fun main n = let
307    -         fun a (x, 0) = d x
308    -           | a (x, n) = b (x, n - 1)
309    -         and b (x, n) = c (x, n)
310    -         and c (x, n) = a (x, n)
311    -         and d x = e (x, 3)
312    -         and e (x, 0) = f x
313    -           | e (x, n) = e (x, n - 1)
314    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
315    -           | f n = n * g (n - 1)
316    -         and g n = a (n, 3)
317    -     in
318    -         f n
319    -     end
320    - end;
321    structure X : sig val main : int -> int end
322    - X.main 3;
323    *** BACK-TRACE ***
324    GOTO   stdIn:4.2-13.20: X.main[2].f
325    GOTO-( stdIn:4.2-13.20: X.main[2].e
326    GOTO   stdIn:4.2-13.20: X.main[2].d
327         / stdIn:4.2-13.20: X.main[2].a
328         | stdIn:4.2-13.20: X.main[2].b
329    GOTO-\ stdIn:4.2-13.20: X.main[2].c
330    CALL   stdIn:4.2-13.20: X.main[2].g
331    GOTO   stdIn:4.2-13.20: X.main[2].f
332    GOTO-( stdIn:4.2-13.20: X.main[2].e
333    GOTO   stdIn:4.2-13.20: X.main[2].d
334         / stdIn:4.2-13.20: X.main[2].a
335         | stdIn:4.2-13.20: X.main[2].b
336    GOTO-\ stdIn:4.2-13.20: X.main[2].c
337    CALL   stdIn:4.2-13.20: X.main[2].g
338    GOTO   stdIn:4.2-13.20: X.main[2].f
339    GOTO-( stdIn:4.2-13.20: X.main[2].e
340    GOTO   stdIn:4.2-13.20: X.main[2].d
341         / stdIn:4.2-13.20: X.main[2].a
342         | stdIn:4.2-13.20: X.main[2].b
343    GOTO-\ stdIn:4.2-13.20: X.main[2].c
344    CALL   stdIn:4.2-13.20: X.main[2].g
345    GOTO   stdIn:4.2-13.20: X.main[2].f
346    CALL   stdIn:2.15-17.4: X.main[2]
347    -
349    (Note that because of a FLINt bug the above code currently does not
350    compile without BTrace turned on.)
352    Here is another example, using my modified Tiger compiler:
354    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
355    - SMLofNJ.Internals.BTrace.mode (SOME true);
356    [autoloading]
357    [autoloading done]
358    val it = false : bool
359    - CM.make "sources.cm";
360    [autoloading]
361    ...
362    [autoloading done]
363    [scanning sources.cm]
364    [parsing (sources.cm):parse.sml]
365    [creating directory CM/SKEL ...]
366    [parsing (sources.cm):tiger.lex.sml]
367    ...
368    [wrote CM/sparc-unix/semant.sml]
369    [compiling (sources.cm):main.sml]
370    [wrote CM/sparc-unix/main.sml]
371    [New bindings added.]
372    val it = true : bool
373    - Main.compile ("../testcases/merge.tig", "foo.out");
374    *** BACK-TRACE ***
375    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
376    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
377    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
378    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
379    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
380    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
381    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
382         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
383    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
384    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
385    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
386    CALL   main.sml:1.18-118.4: Main.compile[2]
387    -
389    ----------------------------------------------------------------------
390    Name: Matthias Blumen
391    Date: 2000/06/21 18:00:00 JST
392    Tag: blume-20000621-manual
393    Description:
395    CM manual update: Path environments documented.
397    ----------------------------------------------------------------------
398    Name: Matthias Blume
399    Date: 2000/06/19 13:40:00
400    Tag: blume-20000619-manual
401    Description:
403    CM manual and system/README update.  This only covers the fact that
404    there are no more implicit anchors.  (Path environments and the "bind"
405    option to "cm" have yet to be documented.)
407    ----------------------------------------------------------------------
408    Name: Matthias Blume
409    Date: 2000/06/19 11:05:00 JST
410    Tag: blume-20000619-chdir-bugfix
411    Description:
413    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
415    ----------------------------------------------------------------------
416    Name: Matthias Blume
417    Date: 2000/06/18 22:00:10 JST
418    Tag: blume-20000618-implicit-anchors-really-gone
419    Description:
421    I updates the previous HISTORY entry where I forgot to mention that
422    implicit anchors are no longer with us.
424    The current update also gets rid of the (now useless) controller
425    CM.Control.implicit_anchors.
427    ----------------------------------------------------------------------
428    Name: Matthias Blume
429    Date: 2000/06/16 17:30:00 JST
430    Tag: blume-20000616-anchorenv
431    Description:
433    This patch implements the long anticipated (just kidding :) "anchor
434    environment" mechanism.  In the course of doing this, I also
435    re-implemented CM's internal "SrcPath" module from scratch.  The new
436    one should be more robust in certain boundary cases.  In any case, it
437    is a lot cleaner than its predecessor (IMHO).
439    This time, although there is yet another boot file format change, I
440    kept the unpickler backward-compatible.  As a result, no new bootfiles
441    are necessary and bootstrapping is straightforward.  (You cannot read
442    new bootfiles into an old system, but the other way around is no
443    problem.)
445    Visible changes:
447    ** 0. Implicit path anchors (without the leading $-symbol) are no
448    longer recognized at all. This means that such path names are not
449    illegal either.  For example, the name basis.cm simply refers to a
450    local file called "basis.cm" (i.e, the name is an ordinary path
451    relative to .cm-files directory).  Or, to put it differently, only
452    names that start with $ are anchored paths.
454    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
455    vanished.
457    John (Reppy) had critizised this as soon as I originally proposed and
458    implemented it, but at that time I did not really deeply believe
459    him. :) Now I came full-circle because I need the $<singlearc> syntax
460    in another place where it cannot be seen as an abbreviation for
461    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
462    seems to mean (i.e., it "expands" into the corresponding anchor
463    value).
465    However, when paths are used as members in CM description files, it
466    continues to be true that there must be at least another arc after the
467    anchor.  This is now enforced separately during semantic analysis
468    (i.e., from a lexical/syntactical point of view, the notation is ok.)
470    ** 2. The "cm" class now accepts an option "bind".  The option's value
471    is a sub-option list of precisely two items -- one labeled "anchor"
472    and the other one labeled "value".  As you might expect, "anchor" is
473    used to specify an anchor name to be bound, and "value" specifies what
474    the anchor is being bound to.
476    The value must be a directory name and can be given in either standard
477    syntax (including the possibility that it is itself an anchored path)
478    or native syntax.
480    Examples:
482       foo.cm (bind:(anchor:bar value:$mystuff/bar))
483       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
485    and so on.
487    The meaning of this is that the .cm-file will be processed with an
488    augmented anchor environment where the given anchor(s) is/are bound to
489    the given values(s).
491    The rationale for having this feature is this: Suppose you are trying
492    to use two different (already stable) libraries a.cm and b.cm (that
493    you perhaps didn't write yourself).  Further, suppose each of these
494    two libraries internally uses its own auxiliary library $aux/lib.cm.
495    Normally you would now have a problem because the anchor "lib" can not
496    be bound to more than one value globally.  Therefore, the project that
497    uses both a.cm and b.cm must locally redirect the anchor to some other
498    place:
500       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
501       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
503    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
504    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
506    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
507    you when you do so at the time of CM.stabilize).  Therefore, you can
508    also use an anchored path as the value:
510      a.cm (bind:(anchor:lib value:$a-lib))
511      b.cm (bind:(anchor:lib value:$b-lib))
513    Now you can globally configure (using the usual CM.Anchor.anchor or
514    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
515    itself is always locally bound, setting it globally is no longer
516    meaningful or necessary (but it does not hurt either).  In fact, "lib"
517    can still be used as a global anchor for separate purposes.  As a
518    matter of fact, one can locally define "lib" in terms of a global
519    "lib":
521      a.cm (bind:(anchor:lib value:$lib/a))
522      b.cm (bind:(anchor:lib value:$lib/b))
524    ** 3: The encoding of path names has changed.  This affects the way
525    path names are shown in CM's progress report and also the internal
526    protocol encoding used for parallel make.
528    The encoding now uses one or more ':'-separated segments.  Each
529    segments corresponds to a file that has been specified relative to the
530    file given by its preceding segment.  The first segment is either
531    relative to the CWD, absolute, or anchored.  Each segment itself is
532    basically a Unix pathname; all segments but the first are relative.
534    Example:
536       $foo/bar/baz.cm:a/b/c.sml
538    This path denotes the file bar/a/b/c.sml relative to the directory
539    denoted by anchor "foo".  Notice that the encoding also includes
540    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
541    paths are resolved relative to the .cm-files directory, so baz.cm must
542    be ignored to get the "real" pathname.
544    To make this fact more obvious, CM puts the names of such "virtual
545    arcs" into parentheses when they appear in progress reports. (No
546    parentheses will appear in the internal protocol encoding.)  Thus,
547    what you really see is:
549      $foo/bar/(baz.cm):a/b/c.sml
551    I find this notation to be much more informative than before.
553    Another new feature of the encoding is that special characters
554    including parentheses, colons, (back)slashes, and white space are
555    written as \ddd (where ddd is the decimal encoding of the character).
557    *** The CM manual still needs to be updated.
559    ----------------------------------------------------------------------
560    Name: Allen Leung
561    Date: 2000/06/15 00:38:00
562    Tag: leunga-20000615-x86-peephole
564    x86 Peephole fix by Fermin.  Affects c-- and moby only.
566    ----------------------------------------------------------------------
567    Name: Matthias Blume
568    Date: 2000/06/12 11:40:00
569    Tag: blume-20000612-parmakefix
570    Description:
572    More cleanup after changing the file naming scheme: This time I
573    repaired the parallel make mechanism for CMB.make which I broke earlier.
575    ----------------------------------------------------------------------
576    Name: Allen Leung
577    Date: 2000/06/09 01:25:00
578    Tag: leunga-20000609-various
580    None of these things should affect normal SML/NJ operations
582    1. Peephole improvements provided by Fermin (c--)
583    2. New annotation DEFUSE for adding extra dependence (moby)
584    3. New X86 LOCK instructions (moby)
585    4. New machine description language for reservation tables (scheduling)
586    5. Fixes to various optimization/analysis modules (branch chaining, dominator
587       trees etc.)
588    6. I've changed the CM files so that they can work with versions
589       110.0.6, 110.25 and 110.28
591    ----------------------------------------------------------------------
592    Name: Matthias Blume
593    Date: 2000/06/09 12:40:00
594    Tag: blume-20000609-log
595    Description:
597    - Removed all(?) remaining RCS Log entries from sources.
599    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
600      anchored paths).
602    ----------------------------------------------------------------------
603    Name: Matthias Blume
604    Date: 2000/06/07 17:00:00 JST
605    Tag: blume-20000607-no-implicit-anchors
606    Description:
608    1. This update changes the default setting for
609    CM.Control.implicit_anchors from true to false.  This means that
610    implicit anchors are no longer permitted by default.  I also tried to
611    make sure that nothing else still relies on implicit anchors.
612    (This is the next step on the schedule towards a CM that does not even
613    have the notion of implicit anchors anymore.)
615    2. More CM manual updates.
617    3. I managed to track down and fix the pickling bug I mentioned last
618    time.  Because of the previously existing workaround, this entails no
619    immediate practical changes.
621    ----------------------------------------------------------------------
622    Name: Matthias Blume
623    Date: 2000/06/06 11:15:00 JST
624    Tag: blume-20000606-lazierpickle
625    Description:
627    !!!! NEW BOOT FILES !!!!
629    * The main purpose of this update is to make library pickles lazier in
630    order to reduce the initial space penalty for autoloading a library.
631    As a result, it is now possible to have $smlnj/compiler.cm
632    pre-registered.  This should take care of the many complaints or
633    inquiries about missing structure Compiler.  This required changes to
634    CM's internal data structures and small tweaks to some algorithms.
636    As a neat additional effect, it is no longer necessary (for the sake
637    of lean heap image files) to distinguish between a "minimal" CM and a
638    "full" CM.  Now, there is only one CM (i.e., the "full" version:
639    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
640    interactive top level. ($smlnj/cm/minimal.cm is gone.)
642    To make the life of compiler-hackers easier, "makeml" now also
643    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
644    words, after you bootstrap a new sml for the first time, you will not
645    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
646    around you will still have to do it, though.)
648    * A second change consists of major updates to the CM manual.  There
649    are now several appendices with summary information and also a full
650    specification of the CM description file syntax.
652    * In directory src/system I added the script "allcross".  This script
653    invokes sml and cross-compiles the compiler for all supported
654    architectures.  (Useful when providing a new set of boot files.)
656    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
657    added a small tweak to pickle-util.sml to work around this problem,
658    but it is not a proper fix yet.  I will investigate further.  (The
659    effect of the bug was an inflation of library pickle size.)
661    * Version number increased to 110.28.1 (to avoid compatibility problems).
663    ----------------------------------------------------------------------
664    Name: Allen Leung
665    Date: 2000/05/25 17:28 EDT
666    Tag: leunga-20000525-ra
667    Description:
669      Fixed a bug in freezing phase of the register allocator.
671    ----------------------------------------------------------------------
672  Name: Allen Leung  Name: Allen Leung
673  Date: 2000/05/15 22:53 EDT  Date: 2000/05/15 22:53 EDT
674  Tag: leunga-20000515-alpha-x86-ra  Tag: leunga-20000515-alpha-x86-ra
# Line 494  Line 1151 
1152  3.  Assembly  3.  Assembly
1154      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
1155      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
1156      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
# Line 517  Line 1174 
1175  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
1176  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
1177  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
1178  legal surface-syntax symbol).  legal surface-syntax symbol).
1180  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 527  Line 1184 
1184  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
1186  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
1187  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
1188  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
1189  more details.  more details.
# Line 642  Line 1299 
1299     (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
1300     used).     used).
1302     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
1303     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
1304     Makefiles or Shell scripts.     Makefiles or Shell scripts.
1306     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 655  Line 1312 
1313     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
1315     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
1316     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
1318  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 789  Line 1446 
1447       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
1448       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
1449       testl is perferable to andl.       testl is preferable to andl.
1451  7. RA (x86 only)  7. RA (x86 only)
# Line 971  Line 1628 
1629  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
1630  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
1631  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
1632  explanation.  explanation.
1634  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
1635  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
1636  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
1637  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 1018  Line 1675 
1675  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
1676  <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,
1677  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
1678  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
1679  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
1680  and, thus, saves a lot of time.  and, thus, saves a lot of time.
# Line 1068  Line 1725 
1725    it from that remote directory.    it from that remote directory.
1726    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
1727    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
1728    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
1729    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
1731    For CVS users, this mechanism is not relevant for source archives, but    For CVS users, this mechanism is not relevant for source archives, but

Removed from v.647  
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  Added in v.686

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