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revision 846, Mon Jun 25 16:06:46 2001 UTC revision 932, Tue Sep 18 19:35:32 2001 UTC
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14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume  Name: Matthias Blume
17    Date: 2001/09/18 15:35:00 EDT
18    Tag: blume-20010918-readme11036
19    Description:
20    
21    Added README files.
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume
25    Date: 2001/09/18 11:45:00 EDT
26    Tag: Release_110_36 (retag)
27    Description:
28    
29    Fixed mistake in config/preloads. Retagged as 110.36.
30    
31    ----------------------------------------------------------------------
32    Name: Matthias Blume
33    Date: 2001/09/18 09:40:00 EDT
34    Tag: Release_110_36_orig (tag changed)
35    Description:
36    
37    New version (110.36).  New bootfiles.
38    
39    ----------------------------------------------------------------------
40    Name: Matthias Blume
41    Date: 2001/09/14 16:15:00 EDT
42    Tag: blume-20010914-x86fastfp
43    Description:
44    
45    John committed some changes that Allen made, in particular a (hopefully)
46    correctly working version of the x86-fp module.
47    
48    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
49    flag to "true".  Everything seems to compile to a fixpoint ok, and
50    "mandelbrot" speeds up by about 15%.
51    
52    ----------------------------------------------------------------------
53    Name: Matthias Blume
54    Date: 2001/09/13 11:20:00 EDT
55    Tag: blume-20010913-minimal
56    Description:
57    
58    1. Stefan Monnier's patch to fix a miscompilation problem that
59       was brought to light by John Reppy's work on Moby.
60    
61    2. Implemented a minimal "structure Compiler" that contains just
62       "version" and "architecture".  The minimal version will be
63       available when the full version is not.  This is for backward-
64       compatibility with code that wants to test Compiler.version.
65    
66    ----------------------------------------------------------------------
67    Name: Matthias Blume
68    Date: 2001/08/28 14:03:00 EDT
69    Tag: blume-20010828-ml-lex
70    Description:
71    
72    Fix for bug 1581, received from Neophytos Michael.
73    
74    ----------------------------------------------------------------------
75    Name: Matthias Blume
76    Date: 2001/08/27 11:20:00 EDT
77    Tag: blume-20010827-readme11035
78    Description:
79    
80    Fleshed out the README file for 110.35.
81    
82    ----------------------------------------------------------------------
83    Name: Matthias Blume
84    Date: 2001/08/24 17:10:00 EDT
85    Tag: Release_110_35
86    Description:
87    
88    New version number (110.35).  New bootfiles.
89    
90    ----------------------------------------------------------------------
91    Name: Lal George
92    Date: 2001/08/24 13:47:18 EDT 2001
93    Tag: george-20010824-MLRISC-graphs
94    Description:
95    
96     removed clusters from MLRISC completely and replaced with graphs.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2001/08/23 17:50:00 EDT
101    Tag: blume-20010823-toplevel
102    Description:
103    
104    - some reorganization of the code that implements various kinds of
105      environments in the compiler (static, dynamic, symbolic, combined)
106    - re-implemented the EnvRef module so that evalStream works properly
107      (if the stream contains references to "use", "CM.make", etc.)
108    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
109    
110    ----------------------------------------------------------------------
111    Name: Matthias Blume
112    Date: 2001/08/20 15:50 EDT
113    Tag: blume20010820-slipup
114    Description:
115    
116    I forgot to commit a few files.  Here they are...
117    
118    ----------------------------------------------------------------------
119    Name: Matthias Blume
120    Date: 2001/08/20 15:35:00 EDT
121    Tag: blume-20010820-debugprof
122    Description:
123    
124    !!!! NEW BOOTFILES !!!!
125    
126    This is another round of reorganizing the compiler sources.  This
127    time the main goal was to factor out all the "instrumentation"
128    passes (for profiling and backtracing) into their own library.
129    The difficulty was to do it in such a way that it does not depend
130    on elaborate.cm but only on elabdata.cm.
131    
132    Therefore there have been further changes to both elaborate.cm and
133    elabdata.cm -- more "generic" things have been moved from the former
134    to the latter.  As a result, I was forced to split the assignment
135    of numbers indicating "primtyc"s into two portions: SML-generic and
136    SML/NJ-specific.  Since it would have been awkward to maintain,
137    I bit the bullet and actually _changed_ the mapping between these
138    numbers and primtycs.  The bottom line of this is that you need
139    a new set of bin- and bootfiles.
140    
141    I have built new bootfiles for all architectures, so doing a fresh
142    checkout and config/install.sh should be all you need.
143    
144    The newly created library's name is
145    
146        $smlnj/viscomp/debugprof.cm
147    
148    and its sources live under
149    
150        src/compiler/DebugProf
151    
152    ----------------------------------------------------------------------
153    Name: Matthias Blume
154    Date: 2001/08/15 17:15:00 EDT
155    Tag: blume-20010815-compreorg
156    Description:
157    
158    This is a first cut at reorganizing the CM libraries that make up the
159    core of the compiler.  The idea is to separate out pieces that could
160    be used independently by tools, e.g., the parser, the typechecker, etc.
161    
162    The current status is a step in this direction, but it is not quite
163    satisfactory yet.  Expect more changes in the future.
164    
165    Here is the current (new) organization...
166    
167        What used to be $smlnj/viscomp/core.cm is now divided into
168        six CM libraries:
169    
170             $smlnj/viscomp/basics.cm
171                           /parser.cm
172                           /elabdata.cm
173                           /elaborate.cm
174                           /execute.cm
175                           /core.cm
176    
177        The CM files for these libraries live under src/system/smlnj/viscomp.
178        All these libraries are proxy libraries that contain precisely
179        one CM library component.  Here are the locations of the components
180        (all within the src/compiler tree):
181    
182             Basics/basics.cm
183             Parse/parser.cm
184             ElabData/elabdata.cm
185             Elaborator/elaborate.cm
186             Execution/execute.cm
187             core.cm
188    
189         [This organization is the same that has been used already
190         for a while for the architecture-specific parts of the visible
191         compiler and for the old version of core.cm.]
192    
193         As you will notice, many source files have been moved from their
194         respective original locations to a new home in one of the above
195         subtrees.
196    
197         The division of labor between the new libraries is the following:
198    
199             basics.cm:
200                - Simple, basic definitions that pertain to many (or all) of
201                  the other libraries.
202             parser.cm:
203                - The SML parser, producing output of type Ast.dec.
204                - The type family for Ast is also defined and exported here.
205             elabdata.cm:
206                - The datatypes that describe input and output of the elaborator.
207                  This includes types, absyn, and static environments.
208             elaborator.cm:
209                - The SML/NJ type checker and elaborator.
210                  This maps an Ast.dec (with a given static environment) to
211                  an Absyn.dec (with a new static environment).
212                - This libraries implements certain modules that used to be
213                  structures as functors (to remove dependencies on FLINT).
214             execute.cm:
215                - Everything having to do with executing binary code objects.
216                - Dynamic environments.
217             core.cm:
218                - SML/NJ-specific instantiations of the elaborator and MLRISC.
219                - Top-level modules.
220                - FLINT (this should eventually become its own library)
221    
222    Notes:
223    
224    I am not 100% happy with the way I separated the elaborator (and its
225    data structures) from FLINT.  Two instances of the same problem:
226    
227        1. Data structures contain certain fields that carry FLINT-specific
228           information.  I hacked around this using exn and the property list
229           module from smlnj-lib.  But the fact that there are middle-end
230           specific fields around at all is a bit annoying.
231    
232        2. The elaborator calculates certain FLINT-related information.  I tried
233           to make this as abstract as I could using functorization, but, again,
234           the fact that the elaborator has to perform calculations on behalf
235           of the middle-end at all is not nice.
236    
237        3. Having to used exn and property lists is unfortunate because it
238           weakens type checking.  The other alternative (parameterizing
239           nearly *everything*) is not appealing, though.
240    
241    I removed the "rebinding =" warning hack because due to the new organization
242    it was awkward to maintain it.  As a result, the compiler now issues some of
243    these warnings when compiling init.cmi during bootstrap compilation. On
244    the plus side, you also get a warning when you do, for example:
245       val op = = Int32.+
246    which was not the case up to now.
247    
248    I placed "assign" and "deref" into the _Core structure so that the
249    code that deals with the "lazy" keyword can find them there.  This
250    removes the need for having access to the primitive environment
251    during elaboration.
252    
253    ----------------------------------------------------------------------
254    Name: Matthias Blume
255    Date: 2001/08/13
256    Tag: blume-20010813-closures
257    Description:
258    
259    This fix was sent to us by Zhong Shao.  It is supposed to improve the
260    performance of certain loops by avoiding needless closure allocation.
261    
262    ----------------------------------------------------------------------
263    Name: Lal George
264    Date: 2001/07/31 10:03:23 EDT 2001
265    Tag: george-20010731-x86-fmalloc
266    Description: Fixed bug in x86 calls
267    
268        There was a bug where call instructions would mysteriously
269        vanish. The call instruction had to be one that returned
270        a floating point value.
271    
272    ----------------------------------------------------------------------
273    Name: Lal George
274    Date: 2001/07/19 16:36:29 EDT 2001
275    Tag: george-20010719-simple-cells
276    Description:
277    
278    I have dramatically simplified the interface for CELLS in MLRISC.
279    
280    In summary, the cells interface is broken up into three parts:
281    
282      1. CellsBasis : CELLS_BASIS
283    
284            CellsBasis is a top level structure and common for all
285            architectures.  it contains the definitions of basic datatypes
286            and utility  functions over these types.
287    
288      2. functor Cells() : CELLS
289    
290            Cells generates an interface for CELLS that incorporates the
291            specific resources on the target architecture, such as the
292            presence of special register classes, their number and size,
293            and various useful substructures.
294    
295      3. <ARCH>CELLS
296    
297            e.g. SparcCells: SPARCCELLS
298    
299            <ARCH>CELLS usually contains additional bindings for special
300            registers  on the architecture, such as:
301    
302                    val r0 : cell           (* register zero *)
303                    val y : cell            (* Y register *)
304                    val psr : cell          (* processor status register *)
305                    ...
306    
307            The structure returned by applying the Cells functor is opened
308            in this interface.
309    
310    The main implication of all this is that the datatypes for cells is
311    split between CellsBasis and CELLS -- a fairly simple change for user
312    code.
313    
314    In the old scheme the CELLS interface had a definitional binding of
315    the form:
316    
317            signature CELLS = sig
318    
319               structure CellsBasis = CellsBasis
320    
321               ...
322    
323            end
324    
325    With all the sharing constraints that goes on in MLRISC, this old
326    design  quickly leads to errors such as:
327    
328            "structure definition spec inside of sharing ... "
329    
330    
331    and appears to require an unacceptable amount of sharing and where
332    constraint hackery.
333    
334    I think this error message (the interaction of definitional specs and
335    sharing) requires more explanation on our web page.
336    
337    ----------------------------------------------------------------------
338    Name: Matthias Blume
339    Date: 2001/07/19 15:00:00 EDT
340    Tag: blume-20010719-libreorg
341    Description:
342    
343    This update puts together a fairly extensive but straightforward change
344    to the way the libraries that implement the interactive system are
345    organized:
346    
347       The biggest change is the elimination of structure Compiler.  As a
348       replacement for this structure, there is now a CM library
349       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
350       that exports all the substructures of the original structure Compiler
351       directly.  So instead of saying Compiler.Foo.bar one now simply
352       says Foo.bar.  (The CM libraries actually export a collection of
353       structures that is richer than the collection of substructures of
354       structure Compiler.)
355    
356       To make the transition smooth, there is a separate library called
357       $smlnj/compiler/compiler.cm which puts together and exports the
358       original structure Compiler (or at least something very close to it).
359    
360       There are five members of the original structure Compiler
361       that are not exported directly but which instead became members
362       of a new structure Backend (described by signature BACKEND).  These are:
363       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
364       Interact (: INTERACT), structure Machine (: MACHINE), and val
365       architecture (: string).
366    
367       Structure Compiler.Version has become structure CompilerVersion.
368    
369       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
370       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
371       or x86, respectively.
372       Each of these exports the same frontend structures that
373       $smlnj/compiler.cm exports.  But they do not have a structure Backend
374       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
375       Hppa, PPC, Sparc, or X86, respectively.
376    
377       Library $smlnj/compiler/all.cm exports the union of the exports of
378       $smlnj/compiler/<arch>.cm
379    
380       There are no structures <Arch>Compiler anymore, use
381       $smlnj/compiler/<arch>.cm instead.
382    
383       Library host-compiler-0.cm is gone.  Instead, the internal library
384       that instantiates CM is now called cm0.cm.  Selection of the host
385       compiler (backend) is no longer done here but. (Responsibility for it
386       now lies with $smlnj/compiler/current.cm.  This seems to be more
387       logical.)
388    
389       Many individual files have been moved or renamed.  Some files have
390       been split into multiple files, and some "dead" files have been deleted.
391    
392    Aside from these changes to library organization, there are also changes
393    to the way the code itself is organized:
394    
395       Structure Binfile has been re-implemented in such a way that it no
396       longer needs any knowledge of the compiler.  It exclusively deals
397       with the details of binfile layout.  It no longer invokes the
398       compiler (for the purpose of creating new prospective binfile
399       content), and it no longer has any knowledge of how to interpret
400       pickles.
401    
402       Structure Compile (: COMPILE) has been stripped down to the bare
403       essentials of compilation.  It no longer deals with linking/execution.
404       The interface has been cleaned up considerably.
405    
406       Utility routines for dealing with linking and execution have been
407       moved into their own substructures.
408    
409       (The ultimate goal of these changes is to provide a light-weight
410       binfile loader/linker (at least for, e.g., stable libraries) that
411       does not require CM or the compiler to be present.)
412    
413    CM documentation has been updated to reflect the changes to library
414    organization.
415    
416    ----------------------------------------------------------------------
417    Name: Matthias Blume
418    Date: 2001/07/10 17:30:00 EDT
419    Tag: Release_110_34
420    Description:
421    
422    Minor tweak to 110.34 (re-tagged):
423    
424      - README.html file added to CVS repository
425      - runtime compiles properly under FreeBSD 3.X and 4.X
426    
427    ----------------------------------------------------------------------
428    Name: Matthias Blume
429    Date: 2001/07/10 17:30:00 EDT
430    Tag: Release_110_34
431    Description:
432    
433    New version number (110.34). New bootfiles.
434    
435    ----------------------------------------------------------------------
436    Name: Matthias Blume
437    Date: 2001/07/09 16:00:00 EDT
438    Tag: blume-20010709-more-varargs
439    Description:
440    
441    I changed the handling of varargs in ml-nlffigen again:
442    The ellipsis ... will now simply be ignored (with an accompanying warning).
443    
444    The immediate effect is that you can actually call a varargs function
445    from ML -- but you can't actually supply any arguments beyond the ones
446    specified explicitly.  (For example, you can call printf with its format
447    string, but you cannot pass additional arguments.)
448    
449    This behavior is only marginally more useful than the one before, but
450    it has the advantage that a function or, more importantly, a function
451    type never gets dropped on the floor, thus avoiding follow-up problems with
452    other types that refer to the offending one.
453    
454    ----------------------------------------------------------------------
455    Name: Matthias Blume
456    Date: 2001/07/09 11:25:00 EDT
457    Tag: blume-20010709-varargs
458    Description:
459    
460    1. ckit-lib.cm now exports structure Error
461    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
462       with a warning accompanied by a source location.  Moreover, it
463       merely skips the offending function or type and proceeds with the
464       rest of its work.u  As a result, one can safely feed C code containing
465       "..." to ml-nlffigen.
466    3. There are some internal improvements to CM, providing slightly
467       more general string substitutions in the tools subsystem.
468    
469    ----------------------------------------------------------------------
470    Name: Matthias Blume
471    Date: 2001/06/27 15:10:00 EDT
472    Tag: blume-20010627-concur
473    Description:
474    
475    Fixed a small bug in CM's handling of parallel compilation.
476    (You could observe the bug by Control-C-interrupting an ordinary
477    CMB.make or CM.stabilize and then attaching some compile servers.
478    The result was that all of a sudden the previously interrupted
479    compilation would continue on its own.  This was because of
480    an over-optimization: CM did not bother to clean out certain queues
481    when no servers were attached "anyway", resulting in the contents
482    of these queues to grab control when new servers did get attached.)
483    
484    There is also another minor update to the CM manual.
485    
486    ----------------------------------------------------------------------
487    Name: Matthias Blume
488    Date: 2001/06/26 16:15:00 EDT
489    Tag: blume-20010626-cmdoc
490    Description:
491    
492    Minor typo fixed in CM manual (syntax diagram for libraries).
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2001/06/25 22:55:00 EDT
497    Tag: blume-20010625-x86pc
498    Description:
499    
500    Fixed a nasty bug in the X86 assembly code that caused signal
501    handlers to fail (crash) randomly.
502    
503    ----------------------------------------------------------------------
504    Name: Matthias Blume
505  Date: 2001/06/25 12:05:00 EDT  Date: 2001/06/25 12:05:00 EDT
506  Tag: blume-20010625-nlffigen  Tag: blume-20010625-nlffigen
507  Description:  Description:
# Line 29  Line 517 
517       from the C file name without its directory.  This avoids silly things       from the C file name without its directory.  This avoids silly things
518       like "structure GL/GL".       like "structure GL/GL".
519       (Other silly names are still possible because ml-nlffigen does not do       (Other silly names are still possible because ml-nlffigen does not do
520        a thorough check of whether generated names are legal ML identifiers.)        a thorough check of whether generated names are legal ML identifiers.
521          When in doubt, use command line arguments to force particular names.)
522    
523  ----------------------------------------------------------------------  ----------------------------------------------------------------------
524  Name: Matthias Blume  Name: Matthias Blume
# Line 2501  Line 2990 
2990       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
2991       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
2992       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
2993       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
2994       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
2995       Dave's hands. :)       Dave's hands. :)
2996    

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