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revision 777, Fri Jan 12 12:17:38 2001 UTC revision 958, Fri Oct 12 03:54:43 2001 UTC
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11  Date:  Date:
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Lal George
17    Date: 2001/10/11 23:51:34 EDT
18    Tag: george-20011011-too-many-instrs
19    Description:
20    
21    The representation of a program point never expected to see more
22    than 65536 instructions in a basic block!
23    
24    ----------------------------------------------------------------------
25    Name: Lal George
26    Date: 2001/10/09 09:41:37 EDT
27    Tag: george-20011008-mlrisc-labels
28    Description:
29    
30    Changed the machine description files to support printing of
31    local and global labels in assembly code, based on host assembler
32    conventions.
33    
34    ----------------------------------------------------------------------
35    Name: Matthias Blume
36    Date: 2001/09/25 15:25:00 EDT
37    Tag: blume-20010925-exninfo
38    Description:
39    
40    I provided a non-hook implementation of exnName (at the toplevel) and
41    made the "dummy" implementation of exnMessage (at the toplevel) more
42    useful: if nothing gets "hooked in", then at least you are going to
43    see the exception name and a message indicating why you don't see more.
44    
45    [For the time being, programs that need exnMessage and want to use
46    ml-build should either use General.exnMessage (strongly recommended) or
47    refer to structure General at some other point so that CM sees a
48    static dependency.]
49    
50    [Similar remarks go for "print" and "use":  If you want to use their
51    functionality in stand-alone programs generated by ml-build, then use
52    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
53    
54    ----------------------------------------------------------------------
55    Name: Matthias Blume
56    Date: 2001/09/20 17:28:00 EDT
57    Tag: blume-20010920-slowfp
58    Description:
59    
60    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
61    
62    ----------------------------------------------------------------------
63    Name: Matthias Blume
64    Date: 2001/09/20 17:20:00 EDT
65    Tag: blume-20010920-canonicalpaths
66    Description:
67    
68    0. Updated the BOOT file (something that I forgot to do earlier).
69    
70    1. Small internal change to CM so that it avoids "/../" in filenames
71       as much as possible (but only where it is safe).
72    
73    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
74       that arguments that contain delimiters are passed through correctly.
75       This change also means that all "special" arguments of the form
76       @SMLxxx... must come first.
77    
78    3. Changed install script to put relative anchor names for tool commands
79       into pathconfig.
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume
83    >>>>>>> 1.169
84    Date: 2001/09/18 15:35:00 EDT
85    Tag: blume-20010918-readme11036
86    Description:
87    
88    Added README files.
89    
90    ----------------------------------------------------------------------
91    Name: Matthias Blume
92    Date: 2001/09/18 11:45:00 EDT
93    Tag: Release_110_36 (retag)
94    Description:
95    
96    Fixed mistake in config/preloads. Retagged as 110.36.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2001/09/18 09:40:00 EDT
101    Tag: Release_110_36_orig (tag changed)
102    Description:
103    
104    New version (110.36).  New bootfiles.
105    
106    ----------------------------------------------------------------------
107    Name: Matthias Blume
108    Date: 2001/09/14 16:15:00 EDT
109    Tag: blume-20010914-x86fastfp
110    Description:
111    
112    John committed some changes that Allen made, in particular a (hopefully)
113    correctly working version of the x86-fp module.
114    
115    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
116    flag to "true".  Everything seems to compile to a fixpoint ok, and
117    "mandelbrot" speeds up by about 15%.
118    
119    ----------------------------------------------------------------------
120    Name: Matthias Blume
121    Date: 2001/09/13 11:20:00 EDT
122    Tag: blume-20010913-minimal
123    Description:
124    
125    1. Stefan Monnier's patch to fix a miscompilation problem that
126       was brought to light by John Reppy's work on Moby.
127    
128    2. Implemented a minimal "structure Compiler" that contains just
129       "version" and "architecture".  The minimal version will be
130       available when the full version is not.  This is for backward-
131       compatibility with code that wants to test Compiler.version.
132    
133    ----------------------------------------------------------------------
134    Name: Matthias Blume
135    Date: 2001/08/28 14:03:00 EDT
136    Tag: blume-20010828-ml-lex
137    Description:
138    
139    Fix for bug 1581, received from Neophytos Michael.
140    
141    ----------------------------------------------------------------------
142    Name: Matthias Blume
143    Date: 2001/08/27 11:20:00 EDT
144    Tag: blume-20010827-readme11035
145    Description:
146    
147    Fleshed out the README file for 110.35.
148    
149    ----------------------------------------------------------------------
150    Name: Matthias Blume
151    Date: 2001/08/24 17:10:00 EDT
152    Tag: Release_110_35
153    Description:
154    
155    New version number (110.35).  New bootfiles.
156    
157    ----------------------------------------------------------------------
158    Name: Lal George
159    Date: 2001/08/24 13:47:18 EDT 2001
160    Tag: george-20010824-MLRISC-graphs
161    Description:
162    
163     removed clusters from MLRISC completely and replaced with graphs.
164    
165    ----------------------------------------------------------------------
166    Name: Matthias Blume
167    Date: 2001/08/23 17:50:00 EDT
168    Tag: blume-20010823-toplevel
169    Description:
170    
171    - some reorganization of the code that implements various kinds of
172      environments in the compiler (static, dynamic, symbolic, combined)
173    - re-implemented the EnvRef module so that evalStream works properly
174      (if the stream contains references to "use", "CM.make", etc.)
175    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
176    
177    ----------------------------------------------------------------------
178    Name: Matthias Blume
179    Date: 2001/08/20 15:50 EDT
180    Tag: blume20010820-slipup
181    Description:
182    
183    I forgot to commit a few files.  Here they are...
184    
185    ----------------------------------------------------------------------
186    Name: Matthias Blume
187    Date: 2001/08/20 15:35:00 EDT
188    Tag: blume-20010820-debugprof
189    Description:
190    
191    !!!! NEW BOOTFILES !!!!
192    
193    This is another round of reorganizing the compiler sources.  This
194    time the main goal was to factor out all the "instrumentation"
195    passes (for profiling and backtracing) into their own library.
196    The difficulty was to do it in such a way that it does not depend
197    on elaborate.cm but only on elabdata.cm.
198    
199    Therefore there have been further changes to both elaborate.cm and
200    elabdata.cm -- more "generic" things have been moved from the former
201    to the latter.  As a result, I was forced to split the assignment
202    of numbers indicating "primtyc"s into two portions: SML-generic and
203    SML/NJ-specific.  Since it would have been awkward to maintain,
204    I bit the bullet and actually _changed_ the mapping between these
205    numbers and primtycs.  The bottom line of this is that you need
206    a new set of bin- and bootfiles.
207    
208    I have built new bootfiles for all architectures, so doing a fresh
209    checkout and config/install.sh should be all you need.
210    
211    The newly created library's name is
212    
213        $smlnj/viscomp/debugprof.cm
214    
215    and its sources live under
216    
217        src/compiler/DebugProf
218    
219    ----------------------------------------------------------------------
220    Name: Matthias Blume
221    Date: 2001/08/15 17:15:00 EDT
222    Tag: blume-20010815-compreorg
223    Description:
224    
225    This is a first cut at reorganizing the CM libraries that make up the
226    core of the compiler.  The idea is to separate out pieces that could
227    be used independently by tools, e.g., the parser, the typechecker, etc.
228    
229    The current status is a step in this direction, but it is not quite
230    satisfactory yet.  Expect more changes in the future.
231    
232    Here is the current (new) organization...
233    
234        What used to be $smlnj/viscomp/core.cm is now divided into
235        six CM libraries:
236    
237             $smlnj/viscomp/basics.cm
238                           /parser.cm
239                           /elabdata.cm
240                           /elaborate.cm
241                           /execute.cm
242                           /core.cm
243    
244        The CM files for these libraries live under src/system/smlnj/viscomp.
245        All these libraries are proxy libraries that contain precisely
246        one CM library component.  Here are the locations of the components
247        (all within the src/compiler tree):
248    
249             Basics/basics.cm
250             Parse/parser.cm
251             ElabData/elabdata.cm
252             Elaborator/elaborate.cm
253             Execution/execute.cm
254             core.cm
255    
256         [This organization is the same that has been used already
257         for a while for the architecture-specific parts of the visible
258         compiler and for the old version of core.cm.]
259    
260         As you will notice, many source files have been moved from their
261         respective original locations to a new home in one of the above
262         subtrees.
263    
264         The division of labor between the new libraries is the following:
265    
266             basics.cm:
267                - Simple, basic definitions that pertain to many (or all) of
268                  the other libraries.
269             parser.cm:
270                - The SML parser, producing output of type Ast.dec.
271                - The type family for Ast is also defined and exported here.
272             elabdata.cm:
273                - The datatypes that describe input and output of the elaborator.
274                  This includes types, absyn, and static environments.
275             elaborator.cm:
276                - The SML/NJ type checker and elaborator.
277                  This maps an Ast.dec (with a given static environment) to
278                  an Absyn.dec (with a new static environment).
279                - This libraries implements certain modules that used to be
280                  structures as functors (to remove dependencies on FLINT).
281             execute.cm:
282                - Everything having to do with executing binary code objects.
283                - Dynamic environments.
284             core.cm:
285                - SML/NJ-specific instantiations of the elaborator and MLRISC.
286                - Top-level modules.
287                - FLINT (this should eventually become its own library)
288    
289    Notes:
290    
291    I am not 100% happy with the way I separated the elaborator (and its
292    data structures) from FLINT.  Two instances of the same problem:
293    
294        1. Data structures contain certain fields that carry FLINT-specific
295           information.  I hacked around this using exn and the property list
296           module from smlnj-lib.  But the fact that there are middle-end
297           specific fields around at all is a bit annoying.
298    
299        2. The elaborator calculates certain FLINT-related information.  I tried
300           to make this as abstract as I could using functorization, but, again,
301           the fact that the elaborator has to perform calculations on behalf
302           of the middle-end at all is not nice.
303    
304        3. Having to used exn and property lists is unfortunate because it
305           weakens type checking.  The other alternative (parameterizing
306           nearly *everything*) is not appealing, though.
307    
308    I removed the "rebinding =" warning hack because due to the new organization
309    it was awkward to maintain it.  As a result, the compiler now issues some of
310    these warnings when compiling init.cmi during bootstrap compilation. On
311    the plus side, you also get a warning when you do, for example:
312       val op = = Int32.+
313    which was not the case up to now.
314    
315    I placed "assign" and "deref" into the _Core structure so that the
316    code that deals with the "lazy" keyword can find them there.  This
317    removes the need for having access to the primitive environment
318    during elaboration.
319    
320    ----------------------------------------------------------------------
321    Name: Matthias Blume
322    Date: 2001/08/13
323    Tag: blume-20010813-closures
324    Description:
325    
326    This fix was sent to us by Zhong Shao.  It is supposed to improve the
327    performance of certain loops by avoiding needless closure allocation.
328    
329    ----------------------------------------------------------------------
330    Name: Lal George
331    Date: 2001/07/31 10:03:23 EDT 2001
332    Tag: george-20010731-x86-fmalloc
333    Description: Fixed bug in x86 calls
334    
335        There was a bug where call instructions would mysteriously
336        vanish. The call instruction had to be one that returned
337        a floating point value.
338    
339    ----------------------------------------------------------------------
340    Name: Lal George
341    Date: 2001/07/19 16:36:29 EDT 2001
342    Tag: george-20010719-simple-cells
343    Description:
344    
345    I have dramatically simplified the interface for CELLS in MLRISC.
346    
347    In summary, the cells interface is broken up into three parts:
348    
349      1. CellsBasis : CELLS_BASIS
350    
351            CellsBasis is a top level structure and common for all
352            architectures.  it contains the definitions of basic datatypes
353            and utility  functions over these types.
354    
355      2. functor Cells() : CELLS
356    
357            Cells generates an interface for CELLS that incorporates the
358            specific resources on the target architecture, such as the
359            presence of special register classes, their number and size,
360            and various useful substructures.
361    
362      3. <ARCH>CELLS
363    
364            e.g. SparcCells: SPARCCELLS
365    
366            <ARCH>CELLS usually contains additional bindings for special
367            registers  on the architecture, such as:
368    
369                    val r0 : cell           (* register zero *)
370                    val y : cell            (* Y register *)
371                    val psr : cell          (* processor status register *)
372                    ...
373    
374            The structure returned by applying the Cells functor is opened
375            in this interface.
376    
377    The main implication of all this is that the datatypes for cells is
378    split between CellsBasis and CELLS -- a fairly simple change for user
379    code.
380    
381    In the old scheme the CELLS interface had a definitional binding of
382    the form:
383    
384            signature CELLS = sig
385    
386               structure CellsBasis = CellsBasis
387    
388               ...
389    
390            end
391    
392    With all the sharing constraints that goes on in MLRISC, this old
393    design  quickly leads to errors such as:
394    
395            "structure definition spec inside of sharing ... "
396    
397    
398    and appears to require an unacceptable amount of sharing and where
399    constraint hackery.
400    
401    I think this error message (the interaction of definitional specs and
402    sharing) requires more explanation on our web page.
403    
404    ----------------------------------------------------------------------
405    Name: Matthias Blume
406    Date: 2001/07/19 15:00:00 EDT
407    Tag: blume-20010719-libreorg
408    Description:
409    
410    This update puts together a fairly extensive but straightforward change
411    to the way the libraries that implement the interactive system are
412    organized:
413    
414       The biggest change is the elimination of structure Compiler.  As a
415       replacement for this structure, there is now a CM library
416       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
417       that exports all the substructures of the original structure Compiler
418       directly.  So instead of saying Compiler.Foo.bar one now simply
419       says Foo.bar.  (The CM libraries actually export a collection of
420       structures that is richer than the collection of substructures of
421       structure Compiler.)
422    
423       To make the transition smooth, there is a separate library called
424       $smlnj/compiler/compiler.cm which puts together and exports the
425       original structure Compiler (or at least something very close to it).
426    
427       There are five members of the original structure Compiler
428       that are not exported directly but which instead became members
429       of a new structure Backend (described by signature BACKEND).  These are:
430       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
431       Interact (: INTERACT), structure Machine (: MACHINE), and val
432       architecture (: string).
433    
434       Structure Compiler.Version has become structure CompilerVersion.
435    
436       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
437       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
438       or x86, respectively.
439       Each of these exports the same frontend structures that
440       $smlnj/compiler.cm exports.  But they do not have a structure Backend
441       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
442       Hppa, PPC, Sparc, or X86, respectively.
443    
444       Library $smlnj/compiler/all.cm exports the union of the exports of
445       $smlnj/compiler/<arch>.cm
446    
447       There are no structures <Arch>Compiler anymore, use
448       $smlnj/compiler/<arch>.cm instead.
449    
450       Library host-compiler-0.cm is gone.  Instead, the internal library
451       that instantiates CM is now called cm0.cm.  Selection of the host
452       compiler (backend) is no longer done here but. (Responsibility for it
453       now lies with $smlnj/compiler/current.cm.  This seems to be more
454       logical.)
455    
456       Many individual files have been moved or renamed.  Some files have
457       been split into multiple files, and some "dead" files have been deleted.
458    
459    Aside from these changes to library organization, there are also changes
460    to the way the code itself is organized:
461    
462       Structure Binfile has been re-implemented in such a way that it no
463       longer needs any knowledge of the compiler.  It exclusively deals
464       with the details of binfile layout.  It no longer invokes the
465       compiler (for the purpose of creating new prospective binfile
466       content), and it no longer has any knowledge of how to interpret
467       pickles.
468    
469       Structure Compile (: COMPILE) has been stripped down to the bare
470       essentials of compilation.  It no longer deals with linking/execution.
471       The interface has been cleaned up considerably.
472    
473       Utility routines for dealing with linking and execution have been
474       moved into their own substructures.
475    
476       (The ultimate goal of these changes is to provide a light-weight
477       binfile loader/linker (at least for, e.g., stable libraries) that
478       does not require CM or the compiler to be present.)
479    
480    CM documentation has been updated to reflect the changes to library
481    organization.
482    
483    ----------------------------------------------------------------------
484    Name: Matthias Blume
485    Date: 2001/07/10 17:30:00 EDT
486    Tag: Release_110_34
487    Description:
488    
489    Minor tweak to 110.34 (re-tagged):
490    
491      - README.html file added to CVS repository
492      - runtime compiles properly under FreeBSD 3.X and 4.X
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2001/07/10 17:30:00 EDT
497    Tag: Release_110_34
498    Description:
499    
500    New version number (110.34). New bootfiles.
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume
504    Date: 2001/07/09 16:00:00 EDT
505    Tag: blume-20010709-more-varargs
506    Description:
507    
508    I changed the handling of varargs in ml-nlffigen again:
509    The ellipsis ... will now simply be ignored (with an accompanying warning).
510    
511    The immediate effect is that you can actually call a varargs function
512    from ML -- but you can't actually supply any arguments beyond the ones
513    specified explicitly.  (For example, you can call printf with its format
514    string, but you cannot pass additional arguments.)
515    
516    This behavior is only marginally more useful than the one before, but
517    it has the advantage that a function or, more importantly, a function
518    type never gets dropped on the floor, thus avoiding follow-up problems with
519    other types that refer to the offending one.
520    
521    ----------------------------------------------------------------------
522    Name: Matthias Blume
523    Date: 2001/07/09 11:25:00 EDT
524    Tag: blume-20010709-varargs
525    Description:
526    
527    1. ckit-lib.cm now exports structure Error
528    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
529       with a warning accompanied by a source location.  Moreover, it
530       merely skips the offending function or type and proceeds with the
531       rest of its work.u  As a result, one can safely feed C code containing
532       "..." to ml-nlffigen.
533    3. There are some internal improvements to CM, providing slightly
534       more general string substitutions in the tools subsystem.
535    
536    ----------------------------------------------------------------------
537    Name: Matthias Blume
538    Date: 2001/06/27 15:10:00 EDT
539    Tag: blume-20010627-concur
540    Description:
541    
542    Fixed a small bug in CM's handling of parallel compilation.
543    (You could observe the bug by Control-C-interrupting an ordinary
544    CMB.make or CM.stabilize and then attaching some compile servers.
545    The result was that all of a sudden the previously interrupted
546    compilation would continue on its own.  This was because of
547    an over-optimization: CM did not bother to clean out certain queues
548    when no servers were attached "anyway", resulting in the contents
549    of these queues to grab control when new servers did get attached.)
550    
551    There is also another minor update to the CM manual.
552    
553    ----------------------------------------------------------------------
554    Name: Matthias Blume
555    Date: 2001/06/26 16:15:00 EDT
556    Tag: blume-20010626-cmdoc
557    Description:
558    
559    Minor typo fixed in CM manual (syntax diagram for libraries).
560    
561    ----------------------------------------------------------------------
562    Name: Matthias Blume
563    Date: 2001/06/25 22:55:00 EDT
564    Tag: blume-20010625-x86pc
565    Description:
566    
567    Fixed a nasty bug in the X86 assembly code that caused signal
568    handlers to fail (crash) randomly.
569    
570    ----------------------------------------------------------------------
571    Name: Matthias Blume
572    Date: 2001/06/25 12:05:00 EDT
573    Tag: blume-20010625-nlffigen
574    Description:
575    
576    This update fixes a number of minor bugs in ml-nlffigen as reported by
577    Nick Carter <nbc@andrew.cmu.edu>.
578    
579      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
580      2. Default names for generated files are now derived from the name of
581         the C file *without its directory*.  In particular, this causes generated
582         files to be placed locally even if the C file is in some system directory.
583      3. Default names for generated signatures and structures are also derived
584         from the C file name without its directory.  This avoids silly things
585         like "structure GL/GL".
586         (Other silly names are still possible because ml-nlffigen does not do
587          a thorough check of whether generated names are legal ML identifiers.
588          When in doubt, use command line arguments to force particular names.)
589    
590    ----------------------------------------------------------------------
591    Name: Matthias Blume
592    Date: 2001/06/21 12:25:00 EDT
593    Tag: blume-20010621-eXene
594    Description:
595    
596    eXene now compiles and (sort of) works again.
597    
598    The library name (for version > 110.33) is $/eXene.cm.
599    
600    I also added an new example in src/eXene/examples/nbody.  See the
601    README file there for details.
602    
603    ----------------------------------------------------------------------
604    Name: Matthias Blume
605    Date: 2001/06/20 16:40:00 EDT
606    Tag: blume-20010620-cml
607    Description:
608    
609    CML now compiles and works again.
610    
611    Libraries (for version > 110.33):
612    
613      $cml/cml.cm            Main CML library.
614      $cml/basis.cm          CML's version of $/basis.cm.
615      $cml/cml-internal.cm   Internal helper library.
616      $cml/core-cml.cm       Internal helper library.
617      $cml-lib/trace-cml.cm  Tracing facility.
618      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
619    
620    The installer (config/install.sh) has been taught how to properly
621    install this stuff.
622    
623    ----------------------------------------------------------------------
624    Name: Matthias Blume
625    Date: 2001/06/19 17:55:00 EDT
626    Tag: blume-20010619-instantiate
627    Description:
628    
629    This un-breaks the fix for bug 1432.
630    (The bug was originally fixed in 110.9 but I broke it again some
631    time after that.)
632    
633    ----------------------------------------------------------------------
634    Name: Matthias Blume
635    Date: 2001/06/19 17:25:00 EDT
636    Tag: blume-20010619-signals
637    Description:
638    
639    This should (hopefully) fix the long-standing signal handling bug.
640    (The runtime system was constructing a continuation record with an
641    incorrect descriptor which would cause the GC to drop data on the floor...)
642    
643    ----------------------------------------------------------------------
644    Name: Matthias Blume
645    Date: 2001/06/15 15:05:00 EDT
646    Tag: blume-20010615-moresparc
647    Description:
648    
649    Here is a short late-hour update related to Sparc c-calls:
650    
651     -- made handling of double-word arguments a bit smarter
652    
653     -- instruction selection phase tries to collapse certain clumsily
654        constructed ML-Trees; typical example:
655    
656            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
657    
658        This currently has no further impact on SML/NJ since mlriscGen does
659        not seem to generate such patterns in the first place, and c-calls
660        (which did generate them in the beginning) has meanwhile been fixed
661        so as to avoid them as well.
662    
663    ----------------------------------------------------------------------
664    Name: Matthias Blume
665    Date: 2001/06/15 15:05:00 EDT
666    Tag: blume-20010615-sparc
667    Description:
668    
669    The purpose of this update is to provide an implementation of NLFFI
670    on Sparc machines.
671    
672    Here are the changes in detail:
673    
674       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
675       the Sparc implementation of the c-calls API.
676       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
677       for accessing the ML frame.  Thus, we have a real frame pointer and
678       can freely modify %sp without need for an omit-frame-ptr phase.
679       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
680       this case.
681       * ml-nlffigen has been taught to produce code for different architectures
682       and calling conventions.
683       * In a way similar to what was done in the x86 case, the Sparc
684       backend uses its own specific extension to mltree.  (For example,
685       it needs to be able to generate UNIMP instructions which are part
686       of the calling convention.)
687       * ml-nlffi-lib was reorganized to make it more modular (in particular,
688       to make it easier to plug in new machine- and os-dependent parts).
689    
690    There are some other fairly unrelated bug fixes and cleanups as well:
691    
692       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
693       that they properly share their libraries with existing SML/NJ libraries.
694       * I fixed a minor cosmetic bug in CM, supressing certain spurious
695       follow-up error messages.
696       * Updates to CM/CMB documentation.
697    
698    TODO items:
699    
700       * MLRISC should use a different register as its asmTemp on the Sparc.
701         (The current %o2 is a really bad choice because it is part of the
702         calling conventions, so things might interfere in unexpected ways.)
703    
704    ----------------------------------------------------------------------
705    Name: Matthias Blume
706    Date: 2001/06/07
707    Tag: blume-20010607-calls
708    Description:
709    
710    A number of internal changes related to C calls and calling conventions:
711    
712    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
713       number of bytes popped implicitly (by the callee).  In most cases
714       this field is 0 but on x86/win32 it is some non-zero value.  This
715       is information provided for the benefit of the "omit-frameptr" pass.
716    2. The CALL instruction on the x86 carries a similar "pops" field.
717       The instruction selection phase copies its value from the ML-Tree
718       CALL statement.
719    3. On all other architectures, the instruction selection phase checks
720       whether "pops=0" and complains if not.
721    4. The c-calls implementation for x86 now accepts two calling conventions:
722       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
723       up after the call and pops is set to 0.  For "stdcall", the caller
724       does nothing, leaving the cleanup to the callee; pops is set to
725       the number of bytes that were pushed onto the stack.
726    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
727       distinguish between "ccall" and "stdcall".
728    6. The UNIMP instruction has been added to the supported Sparc instruction
729       set. (This is needed for implementing the official C calling convention
730       on this architecture.)
731    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
732       work with the latest CM.
733    
734    ----------------------------------------------------------------------
735    Name: Matthias Blume
736    Date: 2001/06/05 15:10:00 EDT
737    Tag: blume-20010605-cm-index
738    Description:
739    
740    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
741    
742    1. CM can now generate "index files".  These are human-readable files
743       that list on a per-.cm-file basis each toplevel symbol defined or
744       imported.  The location of the index file for
745       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
746       To enable index-file generation, set CM.Control.generate_index to true
747       or export an environment-symbol: export CM_GENERATE_INDEX=true.
748    
749       The CM manual has been updated accordingly.
750    
751    2. I made some slight modifications to the c-calls API in MLRISC.
752    
753         a) There is now a callback to support saving/restoring of
754            dedicated but caller-save registers around the actual call
755            instruction.
756         b) One can optionally specify a comment-annotation for the
757            call instruction.
758    
759    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
760       (For example, the comment annotation shows the C prototype of
761        the function being called.)
762    
763    ----------------------------------------------------------------------
764    Name: Matthias Blume
765    Date: 2001/06/01 13:30:00 EDT
766    Tag: blume-20010601-nlffi-cleanup
767    Description:
768    
769    This is mostly a cleanup of MLFFI stuff:
770    
771       - some signature files have been put into a more exposed place
772       - the ugly 'f type parameter is gone (simplifies types tremendously!)
773       - ml-nlffigen changed accordingly
774       - tutorial updated
775    
776    Other changes:
777    
778       - author's affiliation in CM manual(s) updated
779       - some more recognized keywords added to Allen's sml.sty
780    
781    ----------------------------------------------------------------------
782    Name: Matthias Blume
783    Date: 2001/05/25 15:30:00 EDT
784    Tag: blume-20010525-iptr
785    Description:
786    
787      - put the official 110.33-README (as it appears on the ftp server) under
788        CVS
789      - fixed a small bug related to incomplete pointer types in
790        ml-nlffigen
791      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
792        (it does not need the 'f type parameter)
793    
794    ----------------------------------------------------------------------
795    Name: Matthias Blume
796    Date: 2001/05/23 14:30:00 EDT
797    Tag: Release_110_33
798    Description:
799    
800    New version number (110.33).  New bootfiles.
801    
802    ----------------------------------------------------------------------
803    Name: Matthias Blume
804    Date: 2001/05/22 18:06:00 EDT
805    Tag: blume-20010522-targets
806    Description:
807    
808    Made install.sh use file config/targets.customized if it exists, falling
809    back to config/targets if it doesn't.  This way one can have a customized
810    version of the targets file without touching the "real thing", thus
811    eliminating the constant fear of accidentally checking something bogus
812    back into the CVS repository...  (File config/targets.customized must
813    not be added to the repository!)
814    
815    ----------------------------------------------------------------------
816    Name: Matthias Blume
817    Date: 2001/05/22 16:30:00 EDT
818    Tag: blume-20010522-minitut
819    Description:
820    
821    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
822       struct returns.
823    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
824       incomplete, preliminary documentation for NLFFI.
825    
826    ----------------------------------------------------------------------
827    Name: Matthias Blume
828    Date: 2001/05/14 11:30:00 EDT
829    Tag: blume-20010514-script
830    Description:
831    
832    Some bugs in install script fixed.
833    
834    In addition to that I also made a slight change to the NLFFI API:
835    Functors generated by ml-nlffigen now take the dynamic library as a
836    straight functor argument, not as a suspended one.  (The original
837    functor code used to force the suspension right away anyway, so there
838    was nothing gained by this complication of the interface.)
839    
840    ----------------------------------------------------------------------
841    Name: Matthias Blume
842    Date: 2001/05/11 14:35:00 EDT
843    Tag: blume-20010511-ml-nlffi
844    Description:
845    
846    I finally took the plunge and added my new FFI code to the main
847    repository.  For x86-linux it is now ready for prime-time.
848    
849    There are two new subdirectories of "src":
850    
851      - ml-nlffi-lib:
852           The utility library for programs using the FFI interface.
853           Here is the implementation of $/c.cm and its associated low-level
854           partners $/c-int.cm and $/memory.cm.
855      - ml-nlffigen:
856           A stand-alone program for generating ML glue code from C source
857           code.
858    
859    Building ml-nlffigen requires $/ckit-lib.cm.
860    
861    The config/install.sh script has been updates to do the Right Thing
862    (hopefully).
863    
864    Notice that the source tree for the C-Kit will not be put under "src"
865    but directly under the installation root directory.  (This is the
866    structure that currently exists on the CVS server when you check out
867    module "sml".)  Fortunately, config/install.sh knows about this oddity.
868    
869    Bugs: No documentation yet.
870    
871    ----------------------------------------------------------------------
872    Name: Matthias Blume
873    Date: 2001/05/09 16:35:00 EDT
874    Tag: blume-20010509-cpscontract
875    Description:
876    
877    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
878    wrapper/unwrapper elimination did not decrement usage counts and some
879    dead variables got overlooked by the dead-up logic.)
880    
881    ----------------------------------------------------------------------
882    Name: Lal George
883    Date: 2001/05/08  17:26:09 EDT
884    Tag: george-20010508-omit-frameptr
885    Description:
886    
887    Changes to implement the omit-frame-pointer optimization to support
888    raw C calls. For now, there is only support on the Intel x86, but
889    other architectures will follow as more experience is gained with this.
890    
891    
892    ----------------------------------------------------------------------
893    Name: Matthias Blume
894    Date: 2001/05/07 14:40:00 EDT
895    Tag: blume-20010507-proxies
896    Description:
897    
898    I made into "proxy libraries" all libraries that qualify for such a
899    change.  (A qualifying library is a library that has another library or
900    groups as its sole member and repeats that member's export list
901    verbatim.  A proxy library avoids this repetition by omitting its export
902    list, effectively inheriting the list that its (only) member exports.
903    See the CM manual for more explanation.)
904    The main effect is that explicit export lists for these libraries
905    do not have to be kepts in sync, making maintenance a bit easier.
906    
907    I also added copyright notices to many .cm-files.
908    
909    Last but not least, I made a new set of bootfiles.
910    
911    ----------------------------------------------------------------------
912    Name: Matthias Blume
913    Date: 2001/05/04 17:00:00 EDT
914    Tag: blume-20010504-cm-lsplit
915    Description:
916    
917    0. John merged pending changes to $/smlnj-lib.cm
918    
919    1. Allen's previous change accidentally backed out of one of Lal's
920       earlier changes.  I undid this mistake (re-introducing Lal's change).
921    
922    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
923       within the compiler where applicable.  There is some code simplification
924       because of that.
925    
926    3. The "split" phase (in FLINT) is now part of the default list of phases.
927       Compiler.Control.LambdaSplitting.* can be used to globally control the
928       lambda-splitting (cross-module-inlining) engine.  In addition to that,
929       it can now also be controlled on a per-source basis: CM has been taught
930       a new tool parameter applicable to ML source files.
931    
932       - To turn lambda-splitting off completely:
933            local open Compiler.Control.LambdaSplitting in
934                val _ = set Off
935            end
936       - To make "no lambda-splitting" the global default (but allow per-source
937         overriding); this is the initial setting:
938            local open Compiler.Control.LambdaSplitting in
939                val _ = set (Default NONE)
940            end
941       - To make "lambda-splitting with aggressiveness a" the global default
942         (and allow per-source overriding):
943            local open Compiler.Control.LambdaSplitting in
944                val _ = set (Default (SOME a))
945            end
946    
947       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
948         write (in the respective .cm-file):
949            a.sml (lambdasplitting:off)
950       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
951            a.sml (lambdasplitting:on)
952       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
953         <a> is a decimal non-negative integer):
954            a.sml (lambdasplitting:<a>)
955       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
956            a.sml (lambdasplitting:infinity)
957       - To use the global default for a.sml:
958            a.sml (lambdasplitting:default)
959         or simply
960            a.sml
961    
962    ----------------------------------------------------------------------
963    Name: Allen Leung
964    Date: 2001/05/04 01:57:00 EDT
965    Tag: leunga-20010504-sync
966    Description:
967    
968      MLRISC features.
969    
970      1. Fix to CMPXCHG instructions.
971      2. Changed RA interface to allow annotations in callbacks.
972      3. Added a new method to the stream interface to allow annotations updates.
973    
974    ----------------------------------------------------------------------
975    Name: Matthias Blume
976    Date: 2001/05/01 11:45:00 EDT
977    Tag: blume-20010501-pcedittmp
978    Description:
979    
980    Changed install.sh to use the current working directory instead of
981    /usr/tmp for a temporary file (pcedittmp).  The previous choice
982    of /usr/tmp caused trouble with MacOS X because of file premission
983    problems.
984    
985    ----------------------------------------------------------------------
986    Name: Matthias Blume
987    Date: 2001/04/20 11:10:00 EDT
988    Tag: blume-20010420-inMLflag
989    Description:
990    
991     - added vp_limitPtrMask to vproc-state.h
992       (for use by the raw-C-calls mechanism to implement proper interrupt
993        handling)
994     - made the ML compiler aware of various data-structure offsets so it
995       can generate code for accessing the vp_inML flag and vp_limitPtrMask
996     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
997       raw C-calls
998    
999    ----------------------------------------------------------------------
1000    Name: Lal George
1001    Date: 2001/04/20 09:15:28 EDT
1002    Tag: george-20010420-macosX
1003    Description:
1004    
1005     - Changes to port to Mac OS X; Darwin.
1006    
1007     - In the process I found that sqrt was broken on the PPC, because the
1008       fsqrt instruction is not implemented.
1009    
1010    ----------------------------------------------------------------------
1011    Name: Matthias Blume
1012    Date: 2001/04/18 12:45:00 EDT
1013    Tag: blume-20010418-ccalls
1014    Description:
1015    
1016     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1017       (this bug prevented structure arguments containing pointers from being
1018        passed correctly)
1019     - changed the raw-C-call code in mlriscGen.sml in such a way that
1020       structure arguments are represented as a pointer to the beginning
1021       of the structure (instead of having a series of synthesized arguments,
1022       one for each structure member)
1023    
1024     - made makeml script's verbosity level configurable via environment
1025       variable (MAKEML_VERBOSITY)
1026    
1027     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1028       in rawmem-x86.sml; we are now using the real thing
1029    
1030    ----------------------------------------------------------------------
1031    Name: Matthias Blume
1032    Date: 2001/03/22 16:25:00 EST
1033    Tag: blume-20010322-bootfiles
1034    Description:
1035    
1036    Created a new set of bootfiles (for your automatic installation convenience).
1037    
1038    ----------------------------------------------------------------------
1039    Name: Matthias Blume
1040    Date: 2001/03/22 15:10:00 EST
1041    Tag: blume-20010322-rawmem-parcm
1042    Description:
1043    
1044    1. All "raw memory access" primitives for the new FFI are implemented now
1045       (at least on the x86).
1046    2. Some further cleanup of CM's parallel make mechanism.
1047    
1048    ----------------------------------------------------------------------
1049    Name: Matthias Blume
1050    Date: 2001/03/19 17:53:00 EST
1051    Tag: blume-20010319-parallel
1052    Description:
1053    
1054    Parallel make (using compile servers) now works again.
1055    
1056    To this end, CM.stabilize and CMB.make have been modified to work in
1057    two passes when compile servers are attached:
1058       1. Compile everything, do not perform stabilization; this pass
1059          uses compile servers
1060       2. Stabilize everything; this pass does not use compile servers
1061    If there are no compile servers, the two passes are combined into one
1062    (as before).  Splitting the passes increases the inherent parallelism
1063    in the dependency graph because the entire graph including all
1064    libraries is available at the same time.  This, in turn, improves
1065    server utilization.  The downside is that the master process will
1066    have to do some extra work after compilation is done (because for
1067    technical reasons it must re-read all the binfiles during stabilization).
1068    
1069    ----------------------------------------------------------------------
1070    Name: Matthias Blume
1071    Date: 2001/03/16 12:22:00 EST
1072    Tag: blume-20010316-bootfiles
1073    Description:
1074    
1075    Created a new set of bootfiles (for your automatic installation convenience).
1076    
1077    ----------------------------------------------------------------------
1078    Name: Matthias Blume
1079    Date: 2001/03/16 11:00:00 EST
1080    Tag: blume-20010316-MLTREE-fixup
1081    Description:
1082    
1083    This is a minor fixup for an (untagged) earlier commit by Allen.
1084    (A file was missing).
1085    
1086    ----------------------------------------------------------------------
1087    Name: Allen Leung
1088    Date: Mon Mar  5 18:54:57 EST 2001
1089    Tag: leunga-20010305-cut-support
1090    
1091    1. New support for alternative control-flow in MLTREE.
1092       Currently we support
1093    
1094          FLOW_TO(CALL ...., [k1,...,kn])
1095    
1096       This is needed for 'cuts to' in C-- and try/handle-like constructs
1097       in Moby
1098    
1099       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1100    
1101    2. Register Allocator
1102    
1103       Changes in interface [from Fermin, John]
1104    
1105    3. Alpha 8-bit SLL support [Fermin]
1106    
1107    4. All architectures
1108    
1109       A new module (ClusterExpandCopies) for expanding parallel copies.
1110    
1111    ----------------------------------------------------------------------
1112    Name: Allen Leung
1113    Date: 2001/02/27 23:07:00 EST
1114    Tag: leunga-20010227-minor-stuff
1115    
1116    1. Alpha bug fix for CMOVNE
1117    2. Handle mltree COND(..,FCMP ...,...)
1118    3. Bug fix in simplifier
1119    
1120    ----------------------------------------------------------------------
1121    Name: Matthias Blume
1122    Date: 2001/01/30 17:50:00 EST
1123    Tag: blume-20010130-sync
1124    Description:
1125    
1126    This is just a minor update to sync my devel branch with the main brach.
1127    The only visible change is the addition of some README files.
1128    
1129    ----------------------------------------------------------------------
1130    Name: Matthias Blume
1131    Date: 2001/01/12 23:30:00 JST
1132    Tag: blume-20010112-bootfiles
1133    Description:
1134    
1135    Made a new set of bootfiles that goes with the current state of the
1136    repository.
1137    
1138  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1139  Name: Matthias Blume  Name: Matthias Blume
1140  Date: 2001/01/12 21:20:00 JST  Date: 2001/01/12 21:20:00 JST
# Line 1933  Line 3057 
3057       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3058       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3059       Please, don't be too harsh on me for messing with this code a bit more       Please, don't be too harsh on me for messing with this code a bit more
3060       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3061       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3062       Dave's hands. :)       Dave's hands. :)
3063    

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