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revision 756, Thu Dec 14 16:01:33 2000 UTC revision 928, Tue Sep 18 13:38:46 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: Matthias Blume
17    Date: 2001/09/18 09:40:00 EDT
18    Tag: Release_110_36
19    Description:
20    
21    New version (110.36).  New bootfiles.
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume
25    Date: 2001/09/14 16:15:00 EDT
26    Tag: blume-20010914-x86fastfp
27    Description:
28    
29    John committed some changes that Allen made, in particular a (hopefully)
30    correctly working version of the x86-fp module.
31    
32    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
33    flag to "true".  Everything seems to compile to a fixpoint ok, and
34    "mandelbrot" speeds up by about 15%.
35    
36    ----------------------------------------------------------------------
37    Name: Matthias Blume
38    Date: 2001/09/13 11:20:00 EDT
39    Tag: blume-20010913-minimal
40    Description:
41    
42    1. Stefan Monnier's patch to fix a miscompilation problem that
43       was brought to light by John Reppy's work on Moby.
44    
45    2. Implemented a minimal "structure Compiler" that contains just
46       "version" and "architecture".  The minimal version will be
47       available when the full version is not.  This is for backward-
48       compatibility with code that wants to test Compiler.version.
49    
50    ----------------------------------------------------------------------
51    Name: Matthias Blume
52    Date: 2001/08/28 14:03:00 EDT
53    Tag: blume-20010828-ml-lex
54    Description:
55    
56    Fix for bug 1581, received from Neophytos Michael.
57    
58    ----------------------------------------------------------------------
59    Name: Matthias Blume
60    Date: 2001/08/27 11:20:00 EDT
61    Tag: blume-20010827-readme11035
62    Description:
63    
64    Fleshed out the README file for 110.35.
65    
66    ----------------------------------------------------------------------
67    Name: Matthias Blume
68    Date: 2001/08/24 17:10:00 EDT
69    Tag: Release_110_35
70    Description:
71    
72    New version number (110.35).  New bootfiles.
73    
74    ----------------------------------------------------------------------
75    Name: Lal George
76    Date: 2001/08/24 13:47:18 EDT 2001
77    Tag: george-20010824-MLRISC-graphs
78    Description:
79    
80     removed clusters from MLRISC completely and replaced with graphs.
81    
82    ----------------------------------------------------------------------
83    Name: Matthias Blume
84    Date: 2001/08/23 17:50:00 EDT
85    Tag: blume-20010823-toplevel
86    Description:
87    
88    - some reorganization of the code that implements various kinds of
89      environments in the compiler (static, dynamic, symbolic, combined)
90    - re-implemented the EnvRef module so that evalStream works properly
91      (if the stream contains references to "use", "CM.make", etc.)
92    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
93    
94    ----------------------------------------------------------------------
95    Name: Matthias Blume
96    Date: 2001/08/20 15:50 EDT
97    Tag: blume20010820-slipup
98    Description:
99    
100    I forgot to commit a few files.  Here they are...
101    
102    ----------------------------------------------------------------------
103    Name: Matthias Blume
104    Date: 2001/08/20 15:35:00 EDT
105    Tag: blume-20010820-debugprof
106    Description:
107    
108    !!!! NEW BOOTFILES !!!!
109    
110    This is another round of reorganizing the compiler sources.  This
111    time the main goal was to factor out all the "instrumentation"
112    passes (for profiling and backtracing) into their own library.
113    The difficulty was to do it in such a way that it does not depend
114    on elaborate.cm but only on elabdata.cm.
115    
116    Therefore there have been further changes to both elaborate.cm and
117    elabdata.cm -- more "generic" things have been moved from the former
118    to the latter.  As a result, I was forced to split the assignment
119    of numbers indicating "primtyc"s into two portions: SML-generic and
120    SML/NJ-specific.  Since it would have been awkward to maintain,
121    I bit the bullet and actually _changed_ the mapping between these
122    numbers and primtycs.  The bottom line of this is that you need
123    a new set of bin- and bootfiles.
124    
125    I have built new bootfiles for all architectures, so doing a fresh
126    checkout and config/install.sh should be all you need.
127    
128    The newly created library's name is
129    
130        $smlnj/viscomp/debugprof.cm
131    
132    and its sources live under
133    
134        src/compiler/DebugProf
135    
136    ----------------------------------------------------------------------
137    Name: Matthias Blume
138    Date: 2001/08/15 17:15:00 EDT
139    Tag: blume-20010815-compreorg
140    Description:
141    
142    This is a first cut at reorganizing the CM libraries that make up the
143    core of the compiler.  The idea is to separate out pieces that could
144    be used independently by tools, e.g., the parser, the typechecker, etc.
145    
146    The current status is a step in this direction, but it is not quite
147    satisfactory yet.  Expect more changes in the future.
148    
149    Here is the current (new) organization...
150    
151        What used to be $smlnj/viscomp/core.cm is now divided into
152        six CM libraries:
153    
154             $smlnj/viscomp/basics.cm
155                           /parser.cm
156                           /elabdata.cm
157                           /elaborate.cm
158                           /execute.cm
159                           /core.cm
160    
161        The CM files for these libraries live under src/system/smlnj/viscomp.
162        All these libraries are proxy libraries that contain precisely
163        one CM library component.  Here are the locations of the components
164        (all within the src/compiler tree):
165    
166             Basics/basics.cm
167             Parse/parser.cm
168             ElabData/elabdata.cm
169             Elaborator/elaborate.cm
170             Execution/execute.cm
171             core.cm
172    
173         [This organization is the same that has been used already
174         for a while for the architecture-specific parts of the visible
175         compiler and for the old version of core.cm.]
176    
177         As you will notice, many source files have been moved from their
178         respective original locations to a new home in one of the above
179         subtrees.
180    
181         The division of labor between the new libraries is the following:
182    
183             basics.cm:
184                - Simple, basic definitions that pertain to many (or all) of
185                  the other libraries.
186             parser.cm:
187                - The SML parser, producing output of type Ast.dec.
188                - The type family for Ast is also defined and exported here.
189             elabdata.cm:
190                - The datatypes that describe input and output of the elaborator.
191                  This includes types, absyn, and static environments.
192             elaborator.cm:
193                - The SML/NJ type checker and elaborator.
194                  This maps an Ast.dec (with a given static environment) to
195                  an Absyn.dec (with a new static environment).
196                - This libraries implements certain modules that used to be
197                  structures as functors (to remove dependencies on FLINT).
198             execute.cm:
199                - Everything having to do with executing binary code objects.
200                - Dynamic environments.
201             core.cm:
202                - SML/NJ-specific instantiations of the elaborator and MLRISC.
203                - Top-level modules.
204                - FLINT (this should eventually become its own library)
205    
206    Notes:
207    
208    I am not 100% happy with the way I separated the elaborator (and its
209    data structures) from FLINT.  Two instances of the same problem:
210    
211        1. Data structures contain certain fields that carry FLINT-specific
212           information.  I hacked around this using exn and the property list
213           module from smlnj-lib.  But the fact that there are middle-end
214           specific fields around at all is a bit annoying.
215    
216        2. The elaborator calculates certain FLINT-related information.  I tried
217           to make this as abstract as I could using functorization, but, again,
218           the fact that the elaborator has to perform calculations on behalf
219           of the middle-end at all is not nice.
220    
221        3. Having to used exn and property lists is unfortunate because it
222           weakens type checking.  The other alternative (parameterizing
223           nearly *everything*) is not appealing, though.
224    
225    I removed the "rebinding =" warning hack because due to the new organization
226    it was awkward to maintain it.  As a result, the compiler now issues some of
227    these warnings when compiling init.cmi during bootstrap compilation. On
228    the plus side, you also get a warning when you do, for example:
229       val op = = Int32.+
230    which was not the case up to now.
231    
232    I placed "assign" and "deref" into the _Core structure so that the
233    code that deals with the "lazy" keyword can find them there.  This
234    removes the need for having access to the primitive environment
235    during elaboration.
236    
237    ----------------------------------------------------------------------
238    Name: Matthias Blume
239    Date: 2001/08/13
240    Tag: blume-20010813-closures
241    Description:
242    
243    This fix was sent to us by Zhong Shao.  It is supposed to improve the
244    performance of certain loops by avoiding needless closure allocation.
245    
246    ----------------------------------------------------------------------
247    Name: Lal George
248    Date: 2001/07/31 10:03:23 EDT 2001
249    Tag: george-20010731-x86-fmalloc
250    Description: Fixed bug in x86 calls
251    
252        There was a bug where call instructions would mysteriously
253        vanish. The call instruction had to be one that returned
254        a floating point value.
255    
256    ----------------------------------------------------------------------
257    Name: Lal George
258    Date: 2001/07/19 16:36:29 EDT 2001
259    Tag: george-20010719-simple-cells
260    Description:
261    
262    I have dramatically simplified the interface for CELLS in MLRISC.
263    
264    In summary, the cells interface is broken up into three parts:
265    
266      1. CellsBasis : CELLS_BASIS
267    
268            CellsBasis is a top level structure and common for all
269            architectures.  it contains the definitions of basic datatypes
270            and utility  functions over these types.
271    
272      2. functor Cells() : CELLS
273    
274            Cells generates an interface for CELLS that incorporates the
275            specific resources on the target architecture, such as the
276            presence of special register classes, their number and size,
277            and various useful substructures.
278    
279      3. <ARCH>CELLS
280    
281            e.g. SparcCells: SPARCCELLS
282    
283            <ARCH>CELLS usually contains additional bindings for special
284            registers  on the architecture, such as:
285    
286                    val r0 : cell           (* register zero *)
287                    val y : cell            (* Y register *)
288                    val psr : cell          (* processor status register *)
289                    ...
290    
291            The structure returned by applying the Cells functor is opened
292            in this interface.
293    
294    The main implication of all this is that the datatypes for cells is
295    split between CellsBasis and CELLS -- a fairly simple change for user
296    code.
297    
298    In the old scheme the CELLS interface had a definitional binding of
299    the form:
300    
301            signature CELLS = sig
302    
303               structure CellsBasis = CellsBasis
304    
305               ...
306    
307            end
308    
309    With all the sharing constraints that goes on in MLRISC, this old
310    design  quickly leads to errors such as:
311    
312            "structure definition spec inside of sharing ... "
313    
314    
315    and appears to require an unacceptable amount of sharing and where
316    constraint hackery.
317    
318    I think this error message (the interaction of definitional specs and
319    sharing) requires more explanation on our web page.
320    
321    ----------------------------------------------------------------------
322    Name: Matthias Blume
323    Date: 2001/07/19 15:00:00 EDT
324    Tag: blume-20010719-libreorg
325    Description:
326    
327    This update puts together a fairly extensive but straightforward change
328    to the way the libraries that implement the interactive system are
329    organized:
330    
331       The biggest change is the elimination of structure Compiler.  As a
332       replacement for this structure, there is now a CM library
333       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
334       that exports all the substructures of the original structure Compiler
335       directly.  So instead of saying Compiler.Foo.bar one now simply
336       says Foo.bar.  (The CM libraries actually export a collection of
337       structures that is richer than the collection of substructures of
338       structure Compiler.)
339    
340       To make the transition smooth, there is a separate library called
341       $smlnj/compiler/compiler.cm which puts together and exports the
342       original structure Compiler (or at least something very close to it).
343    
344       There are five members of the original structure Compiler
345       that are not exported directly but which instead became members
346       of a new structure Backend (described by signature BACKEND).  These are:
347       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
348       Interact (: INTERACT), structure Machine (: MACHINE), and val
349       architecture (: string).
350    
351       Structure Compiler.Version has become structure CompilerVersion.
352    
353       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
354       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
355       or x86, respectively.
356       Each of these exports the same frontend structures that
357       $smlnj/compiler.cm exports.  But they do not have a structure Backend
358       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
359       Hppa, PPC, Sparc, or X86, respectively.
360    
361       Library $smlnj/compiler/all.cm exports the union of the exports of
362       $smlnj/compiler/<arch>.cm
363    
364       There are no structures <Arch>Compiler anymore, use
365       $smlnj/compiler/<arch>.cm instead.
366    
367       Library host-compiler-0.cm is gone.  Instead, the internal library
368       that instantiates CM is now called cm0.cm.  Selection of the host
369       compiler (backend) is no longer done here but. (Responsibility for it
370       now lies with $smlnj/compiler/current.cm.  This seems to be more
371       logical.)
372    
373       Many individual files have been moved or renamed.  Some files have
374       been split into multiple files, and some "dead" files have been deleted.
375    
376    Aside from these changes to library organization, there are also changes
377    to the way the code itself is organized:
378    
379       Structure Binfile has been re-implemented in such a way that it no
380       longer needs any knowledge of the compiler.  It exclusively deals
381       with the details of binfile layout.  It no longer invokes the
382       compiler (for the purpose of creating new prospective binfile
383       content), and it no longer has any knowledge of how to interpret
384       pickles.
385    
386       Structure Compile (: COMPILE) has been stripped down to the bare
387       essentials of compilation.  It no longer deals with linking/execution.
388       The interface has been cleaned up considerably.
389    
390       Utility routines for dealing with linking and execution have been
391       moved into their own substructures.
392    
393       (The ultimate goal of these changes is to provide a light-weight
394       binfile loader/linker (at least for, e.g., stable libraries) that
395       does not require CM or the compiler to be present.)
396    
397    CM documentation has been updated to reflect the changes to library
398    organization.
399    
400    ----------------------------------------------------------------------
401    Name: Matthias Blume
402    Date: 2001/07/10 17:30:00 EDT
403    Tag: Release_110_34
404    Description:
405    
406    Minor tweak to 110.34 (re-tagged):
407    
408      - README.html file added to CVS repository
409      - runtime compiles properly under FreeBSD 3.X and 4.X
410    
411    ----------------------------------------------------------------------
412    Name: Matthias Blume
413    Date: 2001/07/10 17:30:00 EDT
414    Tag: Release_110_34
415    Description:
416    
417    New version number (110.34). New bootfiles.
418    
419    ----------------------------------------------------------------------
420    Name: Matthias Blume
421    Date: 2001/07/09 16:00:00 EDT
422    Tag: blume-20010709-more-varargs
423    Description:
424    
425    I changed the handling of varargs in ml-nlffigen again:
426    The ellipsis ... will now simply be ignored (with an accompanying warning).
427    
428    The immediate effect is that you can actually call a varargs function
429    from ML -- but you can't actually supply any arguments beyond the ones
430    specified explicitly.  (For example, you can call printf with its format
431    string, but you cannot pass additional arguments.)
432    
433    This behavior is only marginally more useful than the one before, but
434    it has the advantage that a function or, more importantly, a function
435    type never gets dropped on the floor, thus avoiding follow-up problems with
436    other types that refer to the offending one.
437    
438    ----------------------------------------------------------------------
439    Name: Matthias Blume
440    Date: 2001/07/09 11:25:00 EDT
441    Tag: blume-20010709-varargs
442    Description:
443    
444    1. ckit-lib.cm now exports structure Error
445    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
446       with a warning accompanied by a source location.  Moreover, it
447       merely skips the offending function or type and proceeds with the
448       rest of its work.u  As a result, one can safely feed C code containing
449       "..." to ml-nlffigen.
450    3. There are some internal improvements to CM, providing slightly
451       more general string substitutions in the tools subsystem.
452    
453    ----------------------------------------------------------------------
454    Name: Matthias Blume
455    Date: 2001/06/27 15:10:00 EDT
456    Tag: blume-20010627-concur
457    Description:
458    
459    Fixed a small bug in CM's handling of parallel compilation.
460    (You could observe the bug by Control-C-interrupting an ordinary
461    CMB.make or CM.stabilize and then attaching some compile servers.
462    The result was that all of a sudden the previously interrupted
463    compilation would continue on its own.  This was because of
464    an over-optimization: CM did not bother to clean out certain queues
465    when no servers were attached "anyway", resulting in the contents
466    of these queues to grab control when new servers did get attached.)
467    
468    There is also another minor update to the CM manual.
469    
470    ----------------------------------------------------------------------
471    Name: Matthias Blume
472    Date: 2001/06/26 16:15:00 EDT
473    Tag: blume-20010626-cmdoc
474    Description:
475    
476    Minor typo fixed in CM manual (syntax diagram for libraries).
477    
478    ----------------------------------------------------------------------
479    Name: Matthias Blume
480    Date: 2001/06/25 22:55:00 EDT
481    Tag: blume-20010625-x86pc
482    Description:
483    
484    Fixed a nasty bug in the X86 assembly code that caused signal
485    handlers to fail (crash) randomly.
486    
487    ----------------------------------------------------------------------
488    Name: Matthias Blume
489    Date: 2001/06/25 12:05:00 EDT
490    Tag: blume-20010625-nlffigen
491    Description:
492    
493    This update fixes a number of minor bugs in ml-nlffigen as reported by
494    Nick Carter <nbc@andrew.cmu.edu>.
495    
496      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
497      2. Default names for generated files are now derived from the name of
498         the C file *without its directory*.  In particular, this causes generated
499         files to be placed locally even if the C file is in some system directory.
500      3. Default names for generated signatures and structures are also derived
501         from the C file name without its directory.  This avoids silly things
502         like "structure GL/GL".
503         (Other silly names are still possible because ml-nlffigen does not do
504          a thorough check of whether generated names are legal ML identifiers.
505          When in doubt, use command line arguments to force particular names.)
506    
507    ----------------------------------------------------------------------
508    Name: Matthias Blume
509    Date: 2001/06/21 12:25:00 EDT
510    Tag: blume-20010621-eXene
511    Description:
512    
513    eXene now compiles and (sort of) works again.
514    
515    The library name (for version > 110.33) is $/eXene.cm.
516    
517    I also added an new example in src/eXene/examples/nbody.  See the
518    README file there for details.
519    
520    ----------------------------------------------------------------------
521    Name: Matthias Blume
522    Date: 2001/06/20 16:40:00 EDT
523    Tag: blume-20010620-cml
524    Description:
525    
526    CML now compiles and works again.
527    
528    Libraries (for version > 110.33):
529    
530      $cml/cml.cm            Main CML library.
531      $cml/basis.cm          CML's version of $/basis.cm.
532      $cml/cml-internal.cm   Internal helper library.
533      $cml/core-cml.cm       Internal helper library.
534      $cml-lib/trace-cml.cm  Tracing facility.
535      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
536    
537    The installer (config/install.sh) has been taught how to properly
538    install this stuff.
539    
540    ----------------------------------------------------------------------
541    Name: Matthias Blume
542    Date: 2001/06/19 17:55:00 EDT
543    Tag: blume-20010619-instantiate
544    Description:
545    
546    This un-breaks the fix for bug 1432.
547    (The bug was originally fixed in 110.9 but I broke it again some
548    time after that.)
549    
550    ----------------------------------------------------------------------
551    Name: Matthias Blume
552    Date: 2001/06/19 17:25:00 EDT
553    Tag: blume-20010619-signals
554    Description:
555    
556    This should (hopefully) fix the long-standing signal handling bug.
557    (The runtime system was constructing a continuation record with an
558    incorrect descriptor which would cause the GC to drop data on the floor...)
559    
560    ----------------------------------------------------------------------
561    Name: Matthias Blume
562    Date: 2001/06/15 15:05:00 EDT
563    Tag: blume-20010615-moresparc
564    Description:
565    
566    Here is a short late-hour update related to Sparc c-calls:
567    
568     -- made handling of double-word arguments a bit smarter
569    
570     -- instruction selection phase tries to collapse certain clumsily
571        constructed ML-Trees; typical example:
572    
573            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
574    
575        This currently has no further impact on SML/NJ since mlriscGen does
576        not seem to generate such patterns in the first place, and c-calls
577        (which did generate them in the beginning) has meanwhile been fixed
578        so as to avoid them as well.
579    
580    ----------------------------------------------------------------------
581    Name: Matthias Blume
582    Date: 2001/06/15 15:05:00 EDT
583    Tag: blume-20010615-sparc
584    Description:
585    
586    The purpose of this update is to provide an implementation of NLFFI
587    on Sparc machines.
588    
589    Here are the changes in detail:
590    
591       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
592       the Sparc implementation of the c-calls API.
593       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
594       for accessing the ML frame.  Thus, we have a real frame pointer and
595       can freely modify %sp without need for an omit-frame-ptr phase.
596       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
597       this case.
598       * ml-nlffigen has been taught to produce code for different architectures
599       and calling conventions.
600       * In a way similar to what was done in the x86 case, the Sparc
601       backend uses its own specific extension to mltree.  (For example,
602       it needs to be able to generate UNIMP instructions which are part
603       of the calling convention.)
604       * ml-nlffi-lib was reorganized to make it more modular (in particular,
605       to make it easier to plug in new machine- and os-dependent parts).
606    
607    There are some other fairly unrelated bug fixes and cleanups as well:
608    
609       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
610       that they properly share their libraries with existing SML/NJ libraries.
611       * I fixed a minor cosmetic bug in CM, supressing certain spurious
612       follow-up error messages.
613       * Updates to CM/CMB documentation.
614    
615    TODO items:
616    
617       * MLRISC should use a different register as its asmTemp on the Sparc.
618         (The current %o2 is a really bad choice because it is part of the
619         calling conventions, so things might interfere in unexpected ways.)
620    
621    ----------------------------------------------------------------------
622    Name: Matthias Blume
623    Date: 2001/06/07
624    Tag: blume-20010607-calls
625    Description:
626    
627    A number of internal changes related to C calls and calling conventions:
628    
629    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
630       number of bytes popped implicitly (by the callee).  In most cases
631       this field is 0 but on x86/win32 it is some non-zero value.  This
632       is information provided for the benefit of the "omit-frameptr" pass.
633    2. The CALL instruction on the x86 carries a similar "pops" field.
634       The instruction selection phase copies its value from the ML-Tree
635       CALL statement.
636    3. On all other architectures, the instruction selection phase checks
637       whether "pops=0" and complains if not.
638    4. The c-calls implementation for x86 now accepts two calling conventions:
639       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
640       up after the call and pops is set to 0.  For "stdcall", the caller
641       does nothing, leaving the cleanup to the callee; pops is set to
642       the number of bytes that were pushed onto the stack.
643    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
644       distinguish between "ccall" and "stdcall".
645    6. The UNIMP instruction has been added to the supported Sparc instruction
646       set. (This is needed for implementing the official C calling convention
647       on this architecture.)
648    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
649       work with the latest CM.
650    
651    ----------------------------------------------------------------------
652    Name: Matthias Blume
653    Date: 2001/06/05 15:10:00 EDT
654    Tag: blume-20010605-cm-index
655    Description:
656    
657    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
658    
659    1. CM can now generate "index files".  These are human-readable files
660       that list on a per-.cm-file basis each toplevel symbol defined or
661       imported.  The location of the index file for
662       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
663       To enable index-file generation, set CM.Control.generate_index to true
664       or export an environment-symbol: export CM_GENERATE_INDEX=true.
665    
666       The CM manual has been updated accordingly.
667    
668    2. I made some slight modifications to the c-calls API in MLRISC.
669    
670         a) There is now a callback to support saving/restoring of
671            dedicated but caller-save registers around the actual call
672            instruction.
673         b) One can optionally specify a comment-annotation for the
674            call instruction.
675    
676    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
677       (For example, the comment annotation shows the C prototype of
678        the function being called.)
679    
680    ----------------------------------------------------------------------
681    Name: Matthias Blume
682    Date: 2001/06/01 13:30:00 EDT
683    Tag: blume-20010601-nlffi-cleanup
684    Description:
685    
686    This is mostly a cleanup of MLFFI stuff:
687    
688       - some signature files have been put into a more exposed place
689       - the ugly 'f type parameter is gone (simplifies types tremendously!)
690       - ml-nlffigen changed accordingly
691       - tutorial updated
692    
693    Other changes:
694    
695       - author's affiliation in CM manual(s) updated
696       - some more recognized keywords added to Allen's sml.sty
697    
698    ----------------------------------------------------------------------
699    Name: Matthias Blume
700    Date: 2001/05/25 15:30:00 EDT
701    Tag: blume-20010525-iptr
702    Description:
703    
704      - put the official 110.33-README (as it appears on the ftp server) under
705        CVS
706      - fixed a small bug related to incomplete pointer types in
707        ml-nlffigen
708      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
709        (it does not need the 'f type parameter)
710    
711    ----------------------------------------------------------------------
712    Name: Matthias Blume
713    Date: 2001/05/23 14:30:00 EDT
714    Tag: Release_110_33
715    Description:
716    
717    New version number (110.33).  New bootfiles.
718    
719    ----------------------------------------------------------------------
720    Name: Matthias Blume
721    Date: 2001/05/22 18:06:00 EDT
722    Tag: blume-20010522-targets
723    Description:
724    
725    Made install.sh use file config/targets.customized if it exists, falling
726    back to config/targets if it doesn't.  This way one can have a customized
727    version of the targets file without touching the "real thing", thus
728    eliminating the constant fear of accidentally checking something bogus
729    back into the CVS repository...  (File config/targets.customized must
730    not be added to the repository!)
731    
732    ----------------------------------------------------------------------
733    Name: Matthias Blume
734    Date: 2001/05/22 16:30:00 EDT
735    Tag: blume-20010522-minitut
736    Description:
737    
738    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
739       struct returns.
740    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
741       incomplete, preliminary documentation for NLFFI.
742    
743    ----------------------------------------------------------------------
744    Name: Matthias Blume
745    Date: 2001/05/14 11:30:00 EDT
746    Tag: blume-20010514-script
747    Description:
748    
749    Some bugs in install script fixed.
750    
751    In addition to that I also made a slight change to the NLFFI API:
752    Functors generated by ml-nlffigen now take the dynamic library as a
753    straight functor argument, not as a suspended one.  (The original
754    functor code used to force the suspension right away anyway, so there
755    was nothing gained by this complication of the interface.)
756    
757    ----------------------------------------------------------------------
758    Name: Matthias Blume
759    Date: 2001/05/11 14:35:00 EDT
760    Tag: blume-20010511-ml-nlffi
761    Description:
762    
763    I finally took the plunge and added my new FFI code to the main
764    repository.  For x86-linux it is now ready for prime-time.
765    
766    There are two new subdirectories of "src":
767    
768      - ml-nlffi-lib:
769           The utility library for programs using the FFI interface.
770           Here is the implementation of $/c.cm and its associated low-level
771           partners $/c-int.cm and $/memory.cm.
772      - ml-nlffigen:
773           A stand-alone program for generating ML glue code from C source
774           code.
775    
776    Building ml-nlffigen requires $/ckit-lib.cm.
777    
778    The config/install.sh script has been updates to do the Right Thing
779    (hopefully).
780    
781    Notice that the source tree for the C-Kit will not be put under "src"
782    but directly under the installation root directory.  (This is the
783    structure that currently exists on the CVS server when you check out
784    module "sml".)  Fortunately, config/install.sh knows about this oddity.
785    
786    Bugs: No documentation yet.
787    
788    ----------------------------------------------------------------------
789    Name: Matthias Blume
790    Date: 2001/05/09 16:35:00 EDT
791    Tag: blume-20010509-cpscontract
792    Description:
793    
794    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
795    wrapper/unwrapper elimination did not decrement usage counts and some
796    dead variables got overlooked by the dead-up logic.)
797    
798    ----------------------------------------------------------------------
799    Name: Lal George
800    Date: 2001/05/08  17:26:09 EDT
801    Tag: george-20010508-omit-frameptr
802    Description:
803    
804    Changes to implement the omit-frame-pointer optimization to support
805    raw C calls. For now, there is only support on the Intel x86, but
806    other architectures will follow as more experience is gained with this.
807    
808    
809    ----------------------------------------------------------------------
810    Name: Matthias Blume
811    Date: 2001/05/07 14:40:00 EDT
812    Tag: blume-20010507-proxies
813    Description:
814    
815    I made into "proxy libraries" all libraries that qualify for such a
816    change.  (A qualifying library is a library that has another library or
817    groups as its sole member and repeats that member's export list
818    verbatim.  A proxy library avoids this repetition by omitting its export
819    list, effectively inheriting the list that its (only) member exports.
820    See the CM manual for more explanation.)
821    The main effect is that explicit export lists for these libraries
822    do not have to be kepts in sync, making maintenance a bit easier.
823    
824    I also added copyright notices to many .cm-files.
825    
826    Last but not least, I made a new set of bootfiles.
827    
828    ----------------------------------------------------------------------
829    Name: Matthias Blume
830    Date: 2001/05/04 17:00:00 EDT
831    Tag: blume-20010504-cm-lsplit
832    Description:
833    
834    0. John merged pending changes to $/smlnj-lib.cm
835    
836    1. Allen's previous change accidentally backed out of one of Lal's
837       earlier changes.  I undid this mistake (re-introducing Lal's change).
838    
839    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
840       within the compiler where applicable.  There is some code simplification
841       because of that.
842    
843    3. The "split" phase (in FLINT) is now part of the default list of phases.
844       Compiler.Control.LambdaSplitting.* can be used to globally control the
845       lambda-splitting (cross-module-inlining) engine.  In addition to that,
846       it can now also be controlled on a per-source basis: CM has been taught
847       a new tool parameter applicable to ML source files.
848    
849       - To turn lambda-splitting off completely:
850            local open Compiler.Control.LambdaSplitting in
851                val _ = set Off
852            end
853       - To make "no lambda-splitting" the global default (but allow per-source
854         overriding); this is the initial setting:
855            local open Compiler.Control.LambdaSplitting in
856                val _ = set (Default NONE)
857            end
858       - To make "lambda-splitting with aggressiveness a" the global default
859         (and allow per-source overriding):
860            local open Compiler.Control.LambdaSplitting in
861                val _ = set (Default (SOME a))
862            end
863    
864       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
865         write (in the respective .cm-file):
866            a.sml (lambdasplitting:off)
867       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
868            a.sml (lambdasplitting:on)
869       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
870         <a> is a decimal non-negative integer):
871            a.sml (lambdasplitting:<a>)
872       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
873            a.sml (lambdasplitting:infinity)
874       - To use the global default for a.sml:
875            a.sml (lambdasplitting:default)
876         or simply
877            a.sml
878    
879    ----------------------------------------------------------------------
880    Name: Allen Leung
881    Date: 2001/05/04 01:57:00 EDT
882    Tag: leunga-20010504-sync
883    Description:
884    
885      MLRISC features.
886    
887      1. Fix to CMPXCHG instructions.
888      2. Changed RA interface to allow annotations in callbacks.
889      3. Added a new method to the stream interface to allow annotations updates.
890    
891    ----------------------------------------------------------------------
892    Name: Matthias Blume
893    Date: 2001/05/01 11:45:00 EDT
894    Tag: blume-20010501-pcedittmp
895    Description:
896    
897    Changed install.sh to use the current working directory instead of
898    /usr/tmp for a temporary file (pcedittmp).  The previous choice
899    of /usr/tmp caused trouble with MacOS X because of file premission
900    problems.
901    
902    ----------------------------------------------------------------------
903    Name: Matthias Blume
904    Date: 2001/04/20 11:10:00 EDT
905    Tag: blume-20010420-inMLflag
906    Description:
907    
908     - added vp_limitPtrMask to vproc-state.h
909       (for use by the raw-C-calls mechanism to implement proper interrupt
910        handling)
911     - made the ML compiler aware of various data-structure offsets so it
912       can generate code for accessing the vp_inML flag and vp_limitPtrMask
913     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
914       raw C-calls
915    
916    ----------------------------------------------------------------------
917    Name: Lal George
918    Date: 2001/04/20 09:15:28 EDT
919    Tag: george-20010420-macosX
920    Description:
921    
922     - Changes to port to Mac OS X; Darwin.
923    
924     - In the process I found that sqrt was broken on the PPC, because the
925       fsqrt instruction is not implemented.
926    
927    ----------------------------------------------------------------------
928    Name: Matthias Blume
929    Date: 2001/04/18 12:45:00 EDT
930    Tag: blume-20010418-ccalls
931    Description:
932    
933     - fixed two off-by-4 errors in the x86-specific c-calls implementation
934       (this bug prevented structure arguments containing pointers from being
935        passed correctly)
936     - changed the raw-C-call code in mlriscGen.sml in such a way that
937       structure arguments are represented as a pointer to the beginning
938       of the structure (instead of having a series of synthesized arguments,
939       one for each structure member)
940    
941     - made makeml script's verbosity level configurable via environment
942       variable (MAKEML_VERBOSITY)
943    
944     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
945       in rawmem-x86.sml; we are now using the real thing
946    
947    ----------------------------------------------------------------------
948    Name: Matthias Blume
949    Date: 2001/03/22 16:25:00 EST
950    Tag: blume-20010322-bootfiles
951    Description:
952    
953    Created a new set of bootfiles (for your automatic installation convenience).
954    
955    ----------------------------------------------------------------------
956    Name: Matthias Blume
957    Date: 2001/03/22 15:10:00 EST
958    Tag: blume-20010322-rawmem-parcm
959    Description:
960    
961    1. All "raw memory access" primitives for the new FFI are implemented now
962       (at least on the x86).
963    2. Some further cleanup of CM's parallel make mechanism.
964    
965    ----------------------------------------------------------------------
966    Name: Matthias Blume
967    Date: 2001/03/19 17:53:00 EST
968    Tag: blume-20010319-parallel
969    Description:
970    
971    Parallel make (using compile servers) now works again.
972    
973    To this end, CM.stabilize and CMB.make have been modified to work in
974    two passes when compile servers are attached:
975       1. Compile everything, do not perform stabilization; this pass
976          uses compile servers
977       2. Stabilize everything; this pass does not use compile servers
978    If there are no compile servers, the two passes are combined into one
979    (as before).  Splitting the passes increases the inherent parallelism
980    in the dependency graph because the entire graph including all
981    libraries is available at the same time.  This, in turn, improves
982    server utilization.  The downside is that the master process will
983    have to do some extra work after compilation is done (because for
984    technical reasons it must re-read all the binfiles during stabilization).
985    
986    ----------------------------------------------------------------------
987    Name: Matthias Blume
988    Date: 2001/03/16 12:22:00 EST
989    Tag: blume-20010316-bootfiles
990    Description:
991    
992    Created a new set of bootfiles (for your automatic installation convenience).
993    
994    ----------------------------------------------------------------------
995    Name: Matthias Blume
996    Date: 2001/03/16 11:00:00 EST
997    Tag: blume-20010316-MLTREE-fixup
998    Description:
999    
1000    This is a minor fixup for an (untagged) earlier commit by Allen.
1001    (A file was missing).
1002    
1003    ----------------------------------------------------------------------
1004    Name: Allen Leung
1005    Date: Mon Mar  5 18:54:57 EST 2001
1006    Tag: leunga-20010305-cut-support
1007    
1008    1. New support for alternative control-flow in MLTREE.
1009       Currently we support
1010    
1011          FLOW_TO(CALL ...., [k1,...,kn])
1012    
1013       This is needed for 'cuts to' in C-- and try/handle-like constructs
1014       in Moby
1015    
1016       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1017    
1018    2. Register Allocator
1019    
1020       Changes in interface [from Fermin, John]
1021    
1022    3. Alpha 8-bit SLL support [Fermin]
1023    
1024    4. All architectures
1025    
1026       A new module (ClusterExpandCopies) for expanding parallel copies.
1027    
1028    ----------------------------------------------------------------------
1029    Name: Allen Leung
1030    Date: 2001/02/27 23:07:00 EST
1031    Tag: leunga-20010227-minor-stuff
1032    
1033    1. Alpha bug fix for CMOVNE
1034    2. Handle mltree COND(..,FCMP ...,...)
1035    3. Bug fix in simplifier
1036    
1037    ----------------------------------------------------------------------
1038    Name: Matthias Blume
1039    Date: 2001/01/30 17:50:00 EST
1040    Tag: blume-20010130-sync
1041    Description:
1042    
1043    This is just a minor update to sync my devel branch with the main brach.
1044    The only visible change is the addition of some README files.
1045    
1046    ----------------------------------------------------------------------
1047    Name: Matthias Blume
1048    Date: 2001/01/12 23:30:00 JST
1049    Tag: blume-20010112-bootfiles
1050    Description:
1051    
1052    Made a new set of bootfiles that goes with the current state of the
1053    repository.
1054    
1055    ----------------------------------------------------------------------
1056    Name: Matthias Blume
1057    Date: 2001/01/12 21:20:00 JST
1058    Tag: blume-20010112-sync
1059    Description:
1060    
1061    I am just flushing out some minor changes that had accumulated in
1062    my private branch in order to sync with the main tree.  (This is
1063    mainly because I had CVS trouble when trying to merge _into_ my
1064    private branch.)
1065    
1066    Most people should be completely unaffected by this.
1067    
1068    ----------------------------------------------------------------------
1069    Name: Allen Leung
1070    Date: Thu Jan 11 21:03:00 EST 2001
1071    Tag: leunga-20010111-labexp=mltree
1072    Description:
1073    
1074    1.  Removed the type LabelExp and replace it by MLTree.
1075    2.  Rewritten mltree-simplify with the pattern matcher tool.
1076    3.  There were some bugs in alpha code generator which would break
1077        64-bit code generation.
1078    4.  Redo the tools to generate code with the
1079    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1080        are now generated by perl scripts.
1081    
1082    ----------------------------------------------------------------------
1083    Name: Matthias Blume
1084    Date: 2001/01/10 21:55:00 JST
1085    Tag: blume-20010110-rcc
1086    Description:
1087    
1088    The RCC stuff now seems to work (but only on the x86).
1089    This required hacking of the c-calls interface (and -implementation) in
1090    MLRISC.
1091    
1092    Normal compiler users should be unaffected.
1093    
1094    ----------------------------------------------------------------------
1095    Name: Matthias Blume
1096    Date: 2001/01/09 01:20:00 JST
1097    Tag: blume-20010109-rcc
1098    Description:
1099    
1100    This is a fairly big patch, flushing out a large number of pending
1101    changes that I made to my development copy over the last couple of days.
1102    
1103    Of practical relevance at this moment is a workaround for a pickling
1104    bug that Allen ran into the other day.  The cause of the bug itself is
1105    still unknown and it might be hard to fix it properly, but the
1106    workaround has some merits of its own (namely somewhat reducing pickling
1107    overhead for certain libraries).  Therefore, I think this solution should
1108    be satisfactory at this time.
1109    
1110    The rest of the changes (i.e., the vast majority) has to do with my
1111    ongoing efforts of providing direct support for C function calls from
1112    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1113    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1114    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1115    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1116    handle RCC.
1117    
1118    The last part (the changes to mlriscGen.sml) are still known to be
1119    wrong on the x86 and not implemented on all other architectures.  But
1120    the infrastructure is in place. I had to change a few functor
1121    signatures in the backend to be able to route the CCalls interface
1122    from MLRISC there, and I had to specialize the mltree type (on the
1123    x86) to include the necessary extensions. (The extensions themselves
1124    were already there and redy to go in MLRISC/x86).
1125    
1126    Everything should be very happy as soon as someone helps me with
1127    mlriscGen.sml...
1128    
1129    In any case, nothing of this should matter to anyone as long as the
1130    new primop is not being used (which is going to be the case unless you
1131    find it where I hid it :). The rest of the compiler is completely
1132    unaffected.
1133    
1134    ----------------------------------------------------------------------
1135    Name: Matthias Blume
1136    Date: 2001/01/05 00:30:00 JST
1137    Tag: blume-20010105-primops
1138    Description:
1139    
1140    Added some experimental support for work that I am doing right now.
1141    These changes mostly concern added primops, but there is also a new
1142    experimental C library in the runtime system (but currently not enabled
1143    anywhere except on Linux/X86).
1144    
1145    In the course of adding primops (and playing with them), I discovered that
1146    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1147    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1148    To recover, I made type information in INL_PRIM mandatory and changed
1149    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1150    has complete, correct type information (i.e., no bottom types).
1151    
1152    Since all these changes mean that we need new binfiles, I also bumped the
1153    version number to 110.32.1.
1154    
1155    ----------------------------------------------------------------------
1156    Name: Matthias Blume
1157    Date: 2000/12/30 22:10:00 JST
1158    Tag: blume-20001230-various
1159    Description:
1160    
1161    Added proxy libraries for MLRISC and let MLRISC libraries refer
1162    to each other using path anchors.  (See CM manual for explanation.)
1163    
1164    Updated CM documentation.
1165    
1166    Fixed some bugs in CM.
1167    
1168    Implemented "proxy" libraries (= syntactic sugar for CM).
1169    
1170    Added "-quiet" option to makeml and changed runtime system accordingly.
1171    
1172    Added cleanup handler for exportML to reset timers and compiler stats.
1173    
1174    ----------------------------------------------------------------------
1175    Name: Lal George
1176    Date: 2000/12/22 22:22:58 EST 2000
1177    Tag: Release_110_32
1178    Description:
1179    
1180            Infinite precision used throughout MLRISC.
1181            see MLRISC/mltree/machine-int.sig
1182    
1183    ----------------------------------------------------------------------
1184    Name: Matthias Blume
1185    Date: 2000/12/22 23:16:00 JST
1186    Tag: blume-20001222-warn
1187    Description:
1188    
1189    Corrected wording and formatting of some CM warning message which I
1190    broke in my previous patch.
1191    
1192    ----------------------------------------------------------------------
1193    Name: Matthias Blume
1194    Date: 2000/12/22 21:20:00 JST
1195    Tag: blume-20001222-anchorenv
1196    Description:
1197    
1198    Fixed CM's handling of anchor environments in connection with CMB.make.
1199    
1200    ----------------------------------------------------------------------
1201    Name: Matthias Blume
1202    Date: 2000/12/22 13:15:00 JST
1203    Tag: blume-20001222-cleanup
1204    Description:
1205    
1206    Removed src/cm/ffi which does not (and did not) belong here.
1207    
1208    ----------------------------------------------------------------------
1209    Name: Matthias Blume
1210    Date: 2000/12/21 23:55:00 JST
1211    Tag: blume-20001221-exn
1212    Description:
1213    
1214    Probably most important: CM no longer silently swallows all exceptions
1215    in the compiler.
1216    Plus: some other minor CM changes.  For example, CM now reports some
1217    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1218    
1219  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1220  Name: Matthias Blume  Name: Matthias Blume
1221  Date: 2000/12/15 00:01:05 JST  Date: 2000/12/15 00:01:05 JST
# Line 1769  Line 2974 
2974       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
2975       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
2976       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
2977       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
2978       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
2979       Dave's hands. :)       Dave's hands. :)
2980    

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