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revision 841, Fri Jun 15 21:38:20 2001 UTC revision 928, Tue Sep 18 13:38:46 2001 UTC
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14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume  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  Date: 2001/06/15 15:05:00 EDT
563  Tag: blume-20010615-moresparc  Tag: blume-20010615-moresparc
564  Description:  Description:
# Line 2429  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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