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revision 752, Fri Dec 8 23:32:37 2000 UTC revision 909, Fri Aug 24 17:48:53 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: 2001/08/24 13:47:18 EDT 2001
18    Tag: george-20010824-MLRISC-graphs
19    Description:
20    
21     removed clusters from MLRISC completely and replaced with graphs.
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume
25    Date: 2001/08/23 17:50:00 EDT
26    Tag: blume-20010823-toplevel
27    Description:
28    
29    - some reorganization of the code that implements various kinds of
30      environments in the compiler (static, dynamic, symbolic, combined)
31    - re-implemented the EnvRef module so that evalStream works properly
32      (if the stream contains references to "use", "CM.make", etc.)
33    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2001/08/20 15:50 EDT
38    Tag: blume20010820-slipup
39    Description:
40    
41    I forgot to commit a few files.  Here they are...
42    
43    ----------------------------------------------------------------------
44    Name: Matthias Blume
45    Date: 2001/08/20 15:35:00 EDT
46    Tag: blume-20010820-debugprof
47    Description:
48    
49    !!!! NEW BOOTFILES !!!!
50    
51    This is another round of reorganizing the compiler sources.  This
52    time the main goal was to factor out all the "instrumentation"
53    passes (for profiling and backtracing) into their own library.
54    The difficulty was to do it in such a way that it does not depend
55    on elaborate.cm but only on elabdata.cm.
56    
57    Therefore there have been further changes to both elaborate.cm and
58    elabdata.cm -- more "generic" things have been moved from the former
59    to the latter.  As a result, I was forced to split the assignment
60    of numbers indicating "primtyc"s into two portions: SML-generic and
61    SML/NJ-specific.  Since it would have been awkward to maintain,
62    I bit the bullet and actually _changed_ the mapping between these
63    numbers and primtycs.  The bottom line of this is that you need
64    a new set of bin- and bootfiles.
65    
66    I have built new bootfiles for all architectures, so doing a fresh
67    checkout and config/install.sh should be all you need.
68    
69    The newly created library's name is
70    
71        $smlnj/viscomp/debugprof.cm
72    
73    and its sources live under
74    
75        src/compiler/DebugProf
76    
77    ----------------------------------------------------------------------
78    Name: Matthias Blume
79    Date: 2001/08/15 17:15:00 EDT
80    Tag: blume-20010815-compreorg
81    Description:
82    
83    This is a first cut at reorganizing the CM libraries that make up the
84    core of the compiler.  The idea is to separate out pieces that could
85    be used independently by tools, e.g., the parser, the typechecker, etc.
86    
87    The current status is a step in this direction, but it is not quite
88    satisfactory yet.  Expect more changes in the future.
89    
90    Here is the current (new) organization...
91    
92        What used to be $smlnj/viscomp/core.cm is now divided into
93        six CM libraries:
94    
95             $smlnj/viscomp/basics.cm
96                           /parser.cm
97                           /elabdata.cm
98                           /elaborate.cm
99                           /execute.cm
100                           /core.cm
101    
102        The CM files for these libraries live under src/system/smlnj/viscomp.
103        All these libraries are proxy libraries that contain precisely
104        one CM library component.  Here are the locations of the components
105        (all within the src/compiler tree):
106    
107             Basics/basics.cm
108             Parse/parser.cm
109             ElabData/elabdata.cm
110             Elaborator/elaborate.cm
111             Execution/execute.cm
112             core.cm
113    
114         [This organization is the same that has been used already
115         for a while for the architecture-specific parts of the visible
116         compiler and for the old version of core.cm.]
117    
118         As you will notice, many source files have been moved from their
119         respective original locations to a new home in one of the above
120         subtrees.
121    
122         The division of labor between the new libraries is the following:
123    
124             basics.cm:
125                - Simple, basic definitions that pertain to many (or all) of
126                  the other libraries.
127             parser.cm:
128                - The SML parser, producing output of type Ast.dec.
129                - The type family for Ast is also defined and exported here.
130             elabdata.cm:
131                - The datatypes that describe input and output of the elaborator.
132                  This includes types, absyn, and static environments.
133             elaborator.cm:
134                - The SML/NJ type checker and elaborator.
135                  This maps an Ast.dec (with a given static environment) to
136                  an Absyn.dec (with a new static environment).
137                - This libraries implements certain modules that used to be
138                  structures as functors (to remove dependencies on FLINT).
139             execute.cm:
140                - Everything having to do with executing binary code objects.
141                - Dynamic environments.
142             core.cm:
143                - SML/NJ-specific instantiations of the elaborator and MLRISC.
144                - Top-level modules.
145                - FLINT (this should eventually become its own library)
146    
147    Notes:
148    
149    I am not 100% happy with the way I separated the elaborator (and its
150    data structures) from FLINT.  Two instances of the same problem:
151    
152        1. Data structures contain certain fields that carry FLINT-specific
153           information.  I hacked around this using exn and the property list
154           module from smlnj-lib.  But the fact that there are middle-end
155           specific fields around at all is a bit annoying.
156    
157        2. The elaborator calculates certain FLINT-related information.  I tried
158           to make this as abstract as I could using functorization, but, again,
159           the fact that the elaborator has to perform calculations on behalf
160           of the middle-end at all is not nice.
161    
162        3. Having to used exn and property lists is unfortunate because it
163           weakens type checking.  The other alternative (parameterizing
164           nearly *everything*) is not appealing, though.
165    
166    I removed the "rebinding =" warning hack because due to the new organization
167    it was awkward to maintain it.  As a result, the compiler now issues some of
168    these warnings when compiling init.cmi during bootstrap compilation. On
169    the plus side, you also get a warning when you do, for example:
170       val op = = Int32.+
171    which was not the case up to now.
172    
173    I placed "assign" and "deref" into the _Core structure so that the
174    code that deals with the "lazy" keyword can find them there.  This
175    removes the need for having access to the primitive environment
176    during elaboration.
177    
178    ----------------------------------------------------------------------
179    Name: Matthias Blume
180    Date: 2001/08/13
181    Tag: blume-20010813-closures
182    Description:
183    
184    This fix was sent to us by Zhong Shao.  It is supposed to improve the
185    performance of certain loops by avoiding needless closure allocation.
186    
187    ----------------------------------------------------------------------
188    Name: Lal George
189    Date: 2001/07/31 10:03:23 EDT 2001
190    Tag: george-20010731-x86-fmalloc
191    Description: Fixed bug in x86 calls
192    
193        There was a bug where call instructions would mysteriously
194        vanish. The call instruction had to be one that returned
195        a floating point value.
196    
197    ----------------------------------------------------------------------
198    Name: Lal George
199    Date: 2001/07/19 16:36:29 EDT 2001
200    Tag: george-20010719-simple-cells
201    Description:
202    
203    I have dramatically simplified the interface for CELLS in MLRISC.
204    
205    In summary, the cells interface is broken up into three parts:
206    
207      1. CellsBasis : CELLS_BASIS
208    
209            CellsBasis is a top level structure and common for all
210            architectures.  it contains the definitions of basic datatypes
211            and utility  functions over these types.
212    
213      2. functor Cells() : CELLS
214    
215            Cells generates an interface for CELLS that incorporates the
216            specific resources on the target architecture, such as the
217            presence of special register classes, their number and size,
218            and various useful substructures.
219    
220      3. <ARCH>CELLS
221    
222            e.g. SparcCells: SPARCCELLS
223    
224            <ARCH>CELLS usually contains additional bindings for special
225            registers  on the architecture, such as:
226    
227                    val r0 : cell           (* register zero *)
228                    val y : cell            (* Y register *)
229                    val psr : cell          (* processor status register *)
230                    ...
231    
232            The structure returned by applying the Cells functor is opened
233            in this interface.
234    
235    The main implication of all this is that the datatypes for cells is
236    split between CellsBasis and CELLS -- a fairly simple change for user
237    code.
238    
239    In the old scheme the CELLS interface had a definitional binding of
240    the form:
241    
242            signature CELLS = sig
243    
244               structure CellsBasis = CellsBasis
245    
246               ...
247    
248            end
249    
250    With all the sharing constraints that goes on in MLRISC, this old
251    design  quickly leads to errors such as:
252    
253            "structure definition spec inside of sharing ... "
254    
255    
256    and appears to require an unacceptable amount of sharing and where
257    constraint hackery.
258    
259    I think this error message (the interaction of definitional specs and
260    sharing) requires more explanation on our web page.
261    
262    ----------------------------------------------------------------------
263    Name: Matthias Blume
264    Date: 2001/07/19 15:00:00 EDT
265    Tag: blume-20010719-libreorg
266    Description:
267    
268    This update puts together a fairly extensive but straightforward change
269    to the way the libraries that implement the interactive system are
270    organized:
271    
272       The biggest change is the elimination of structure Compiler.  As a
273       replacement for this structure, there is now a CM library
274       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
275       that exports all the substructures of the original structure Compiler
276       directly.  So instead of saying Compiler.Foo.bar one now simply
277       says Foo.bar.  (The CM libraries actually export a collection of
278       structures that is richer than the collection of substructures of
279       structure Compiler.)
280    
281       To make the transition smooth, there is a separate library called
282       $smlnj/compiler/compiler.cm which puts together and exports the
283       original structure Compiler (or at least something very close to it).
284    
285       There are five members of the original structure Compiler
286       that are not exported directly but which instead became members
287       of a new structure Backend (described by signature BACKEND).  These are:
288       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
289       Interact (: INTERACT), structure Machine (: MACHINE), and val
290       architecture (: string).
291    
292       Structure Compiler.Version has become structure CompilerVersion.
293    
294       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
295       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
296       or x86, respectively.
297       Each of these exports the same frontend structures that
298       $smlnj/compiler.cm exports.  But they do not have a structure Backend
299       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
300       Hppa, PPC, Sparc, or X86, respectively.
301    
302       Library $smlnj/compiler/all.cm exports the union of the exports of
303       $smlnj/compiler/<arch>.cm
304    
305       There are no structures <Arch>Compiler anymore, use
306       $smlnj/compiler/<arch>.cm instead.
307    
308       Library host-compiler-0.cm is gone.  Instead, the internal library
309       that instantiates CM is now called cm0.cm.  Selection of the host
310       compiler (backend) is no longer done here but. (Responsibility for it
311       now lies with $smlnj/compiler/current.cm.  This seems to be more
312       logical.)
313    
314       Many individual files have been moved or renamed.  Some files have
315       been split into multiple files, and some "dead" files have been deleted.
316    
317    Aside from these changes to library organization, there are also changes
318    to the way the code itself is organized:
319    
320       Structure Binfile has been re-implemented in such a way that it no
321       longer needs any knowledge of the compiler.  It exclusively deals
322       with the details of binfile layout.  It no longer invokes the
323       compiler (for the purpose of creating new prospective binfile
324       content), and it no longer has any knowledge of how to interpret
325       pickles.
326    
327       Structure Compile (: COMPILE) has been stripped down to the bare
328       essentials of compilation.  It no longer deals with linking/execution.
329       The interface has been cleaned up considerably.
330    
331       Utility routines for dealing with linking and execution have been
332       moved into their own substructures.
333    
334       (The ultimate goal of these changes is to provide a light-weight
335       binfile loader/linker (at least for, e.g., stable libraries) that
336       does not require CM or the compiler to be present.)
337    
338    CM documentation has been updated to reflect the changes to library
339    organization.
340    
341    ----------------------------------------------------------------------
342    Name: Matthias Blume
343    Date: 2001/07/10 17:30:00 EDT
344    Tag: Release_110_34
345    Description:
346    
347    Minor tweak to 110.34 (re-tagged):
348    
349      - README.html file added to CVS repository
350      - runtime compiles properly under FreeBSD 3.X and 4.X
351    
352    ----------------------------------------------------------------------
353    Name: Matthias Blume
354    Date: 2001/07/10 17:30:00 EDT
355    Tag: Release_110_34
356    Description:
357    
358    New version number (110.34). New bootfiles.
359    
360    ----------------------------------------------------------------------
361    Name: Matthias Blume
362    Date: 2001/07/09 16:00:00 EDT
363    Tag: blume-20010709-more-varargs
364    Description:
365    
366    I changed the handling of varargs in ml-nlffigen again:
367    The ellipsis ... will now simply be ignored (with an accompanying warning).
368    
369    The immediate effect is that you can actually call a varargs function
370    from ML -- but you can't actually supply any arguments beyond the ones
371    specified explicitly.  (For example, you can call printf with its format
372    string, but you cannot pass additional arguments.)
373    
374    This behavior is only marginally more useful than the one before, but
375    it has the advantage that a function or, more importantly, a function
376    type never gets dropped on the floor, thus avoiding follow-up problems with
377    other types that refer to the offending one.
378    
379    ----------------------------------------------------------------------
380    Name: Matthias Blume
381    Date: 2001/07/09 11:25:00 EDT
382    Tag: blume-20010709-varargs
383    Description:
384    
385    1. ckit-lib.cm now exports structure Error
386    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
387       with a warning accompanied by a source location.  Moreover, it
388       merely skips the offending function or type and proceeds with the
389       rest of its work.u  As a result, one can safely feed C code containing
390       "..." to ml-nlffigen.
391    3. There are some internal improvements to CM, providing slightly
392       more general string substitutions in the tools subsystem.
393    
394    ----------------------------------------------------------------------
395    Name: Matthias Blume
396    Date: 2001/06/27 15:10:00 EDT
397    Tag: blume-20010627-concur
398    Description:
399    
400    Fixed a small bug in CM's handling of parallel compilation.
401    (You could observe the bug by Control-C-interrupting an ordinary
402    CMB.make or CM.stabilize and then attaching some compile servers.
403    The result was that all of a sudden the previously interrupted
404    compilation would continue on its own.  This was because of
405    an over-optimization: CM did not bother to clean out certain queues
406    when no servers were attached "anyway", resulting in the contents
407    of these queues to grab control when new servers did get attached.)
408    
409    There is also another minor update to the CM manual.
410    
411    ----------------------------------------------------------------------
412    Name: Matthias Blume
413    Date: 2001/06/26 16:15:00 EDT
414    Tag: blume-20010626-cmdoc
415    Description:
416    
417    Minor typo fixed in CM manual (syntax diagram for libraries).
418    
419    ----------------------------------------------------------------------
420    Name: Matthias Blume
421    Date: 2001/06/25 22:55:00 EDT
422    Tag: blume-20010625-x86pc
423    Description:
424    
425    Fixed a nasty bug in the X86 assembly code that caused signal
426    handlers to fail (crash) randomly.
427    
428    ----------------------------------------------------------------------
429    Name: Matthias Blume
430    Date: 2001/06/25 12:05:00 EDT
431    Tag: blume-20010625-nlffigen
432    Description:
433    
434    This update fixes a number of minor bugs in ml-nlffigen as reported by
435    Nick Carter <nbc@andrew.cmu.edu>.
436    
437      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
438      2. Default names for generated files are now derived from the name of
439         the C file *without its directory*.  In particular, this causes generated
440         files to be placed locally even if the C file is in some system directory.
441      3. Default names for generated signatures and structures are also derived
442         from the C file name without its directory.  This avoids silly things
443         like "structure GL/GL".
444         (Other silly names are still possible because ml-nlffigen does not do
445          a thorough check of whether generated names are legal ML identifiers.
446          When in doubt, use command line arguments to force particular names.)
447    
448    ----------------------------------------------------------------------
449    Name: Matthias Blume
450    Date: 2001/06/21 12:25:00 EDT
451    Tag: blume-20010621-eXene
452    Description:
453    
454    eXene now compiles and (sort of) works again.
455    
456    The library name (for version > 110.33) is $/eXene.cm.
457    
458    I also added an new example in src/eXene/examples/nbody.  See the
459    README file there for details.
460    
461    ----------------------------------------------------------------------
462    Name: Matthias Blume
463    Date: 2001/06/20 16:40:00 EDT
464    Tag: blume-20010620-cml
465    Description:
466    
467    CML now compiles and works again.
468    
469    Libraries (for version > 110.33):
470    
471      $cml/cml.cm            Main CML library.
472      $cml/basis.cm          CML's version of $/basis.cm.
473      $cml/cml-internal.cm   Internal helper library.
474      $cml/core-cml.cm       Internal helper library.
475      $cml-lib/trace-cml.cm  Tracing facility.
476      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
477    
478    The installer (config/install.sh) has been taught how to properly
479    install this stuff.
480    
481    ----------------------------------------------------------------------
482    Name: Matthias Blume
483    Date: 2001/06/19 17:55:00 EDT
484    Tag: blume-20010619-instantiate
485    Description:
486    
487    This un-breaks the fix for bug 1432.
488    (The bug was originally fixed in 110.9 but I broke it again some
489    time after that.)
490    
491    ----------------------------------------------------------------------
492    Name: Matthias Blume
493    Date: 2001/06/19 17:25:00 EDT
494    Tag: blume-20010619-signals
495    Description:
496    
497    This should (hopefully) fix the long-standing signal handling bug.
498    (The runtime system was constructing a continuation record with an
499    incorrect descriptor which would cause the GC to drop data on the floor...)
500    
501    ----------------------------------------------------------------------
502    Name: Matthias Blume
503    Date: 2001/06/15 15:05:00 EDT
504    Tag: blume-20010615-moresparc
505    Description:
506    
507    Here is a short late-hour update related to Sparc c-calls:
508    
509     -- made handling of double-word arguments a bit smarter
510    
511     -- instruction selection phase tries to collapse certain clumsily
512        constructed ML-Trees; typical example:
513    
514            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
515    
516        This currently has no further impact on SML/NJ since mlriscGen does
517        not seem to generate such patterns in the first place, and c-calls
518        (which did generate them in the beginning) has meanwhile been fixed
519        so as to avoid them as well.
520    
521    ----------------------------------------------------------------------
522    Name: Matthias Blume
523    Date: 2001/06/15 15:05:00 EDT
524    Tag: blume-20010615-sparc
525    Description:
526    
527    The purpose of this update is to provide an implementation of NLFFI
528    on Sparc machines.
529    
530    Here are the changes in detail:
531    
532       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
533       the Sparc implementation of the c-calls API.
534       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
535       for accessing the ML frame.  Thus, we have a real frame pointer and
536       can freely modify %sp without need for an omit-frame-ptr phase.
537       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
538       this case.
539       * ml-nlffigen has been taught to produce code for different architectures
540       and calling conventions.
541       * In a way similar to what was done in the x86 case, the Sparc
542       backend uses its own specific extension to mltree.  (For example,
543       it needs to be able to generate UNIMP instructions which are part
544       of the calling convention.)
545       * ml-nlffi-lib was reorganized to make it more modular (in particular,
546       to make it easier to plug in new machine- and os-dependent parts).
547    
548    There are some other fairly unrelated bug fixes and cleanups as well:
549    
550       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
551       that they properly share their libraries with existing SML/NJ libraries.
552       * I fixed a minor cosmetic bug in CM, supressing certain spurious
553       follow-up error messages.
554       * Updates to CM/CMB documentation.
555    
556    TODO items:
557    
558       * MLRISC should use a different register as its asmTemp on the Sparc.
559         (The current %o2 is a really bad choice because it is part of the
560         calling conventions, so things might interfere in unexpected ways.)
561    
562    ----------------------------------------------------------------------
563    Name: Matthias Blume
564    Date: 2001/06/07
565    Tag: blume-20010607-calls
566    Description:
567    
568    A number of internal changes related to C calls and calling conventions:
569    
570    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
571       number of bytes popped implicitly (by the callee).  In most cases
572       this field is 0 but on x86/win32 it is some non-zero value.  This
573       is information provided for the benefit of the "omit-frameptr" pass.
574    2. The CALL instruction on the x86 carries a similar "pops" field.
575       The instruction selection phase copies its value from the ML-Tree
576       CALL statement.
577    3. On all other architectures, the instruction selection phase checks
578       whether "pops=0" and complains if not.
579    4. The c-calls implementation for x86 now accepts two calling conventions:
580       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
581       up after the call and pops is set to 0.  For "stdcall", the caller
582       does nothing, leaving the cleanup to the callee; pops is set to
583       the number of bytes that were pushed onto the stack.
584    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
585       distinguish between "ccall" and "stdcall".
586    6. The UNIMP instruction has been added to the supported Sparc instruction
587       set. (This is needed for implementing the official C calling convention
588       on this architecture.)
589    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
590       work with the latest CM.
591    
592    ----------------------------------------------------------------------
593    Name: Matthias Blume
594    Date: 2001/06/05 15:10:00 EDT
595    Tag: blume-20010605-cm-index
596    Description:
597    
598    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
599    
600    1. CM can now generate "index files".  These are human-readable files
601       that list on a per-.cm-file basis each toplevel symbol defined or
602       imported.  The location of the index file for
603       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
604       To enable index-file generation, set CM.Control.generate_index to true
605       or export an environment-symbol: export CM_GENERATE_INDEX=true.
606    
607       The CM manual has been updated accordingly.
608    
609    2. I made some slight modifications to the c-calls API in MLRISC.
610    
611         a) There is now a callback to support saving/restoring of
612            dedicated but caller-save registers around the actual call
613            instruction.
614         b) One can optionally specify a comment-annotation for the
615            call instruction.
616    
617    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
618       (For example, the comment annotation shows the C prototype of
619        the function being called.)
620    
621    ----------------------------------------------------------------------
622    Name: Matthias Blume
623    Date: 2001/06/01 13:30:00 EDT
624    Tag: blume-20010601-nlffi-cleanup
625    Description:
626    
627    This is mostly a cleanup of MLFFI stuff:
628    
629       - some signature files have been put into a more exposed place
630       - the ugly 'f type parameter is gone (simplifies types tremendously!)
631       - ml-nlffigen changed accordingly
632       - tutorial updated
633    
634    Other changes:
635    
636       - author's affiliation in CM manual(s) updated
637       - some more recognized keywords added to Allen's sml.sty
638    
639    ----------------------------------------------------------------------
640    Name: Matthias Blume
641    Date: 2001/05/25 15:30:00 EDT
642    Tag: blume-20010525-iptr
643    Description:
644    
645      - put the official 110.33-README (as it appears on the ftp server) under
646        CVS
647      - fixed a small bug related to incomplete pointer types in
648        ml-nlffigen
649      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
650        (it does not need the 'f type parameter)
651    
652    ----------------------------------------------------------------------
653    Name: Matthias Blume
654    Date: 2001/05/23 14:30:00 EDT
655    Tag: Release_110_33
656    Description:
657    
658    New version number (110.33).  New bootfiles.
659    
660    ----------------------------------------------------------------------
661    Name: Matthias Blume
662    Date: 2001/05/22 18:06:00 EDT
663    Tag: blume-20010522-targets
664    Description:
665    
666    Made install.sh use file config/targets.customized if it exists, falling
667    back to config/targets if it doesn't.  This way one can have a customized
668    version of the targets file without touching the "real thing", thus
669    eliminating the constant fear of accidentally checking something bogus
670    back into the CVS repository...  (File config/targets.customized must
671    not be added to the repository!)
672    
673    ----------------------------------------------------------------------
674    Name: Matthias Blume
675    Date: 2001/05/22 16:30:00 EDT
676    Tag: blume-20010522-minitut
677    Description:
678    
679    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
680       struct returns.
681    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
682       incomplete, preliminary documentation for NLFFI.
683    
684    ----------------------------------------------------------------------
685    Name: Matthias Blume
686    Date: 2001/05/14 11:30:00 EDT
687    Tag: blume-20010514-script
688    Description:
689    
690    Some bugs in install script fixed.
691    
692    In addition to that I also made a slight change to the NLFFI API:
693    Functors generated by ml-nlffigen now take the dynamic library as a
694    straight functor argument, not as a suspended one.  (The original
695    functor code used to force the suspension right away anyway, so there
696    was nothing gained by this complication of the interface.)
697    
698    ----------------------------------------------------------------------
699    Name: Matthias Blume
700    Date: 2001/05/11 14:35:00 EDT
701    Tag: blume-20010511-ml-nlffi
702    Description:
703    
704    I finally took the plunge and added my new FFI code to the main
705    repository.  For x86-linux it is now ready for prime-time.
706    
707    There are two new subdirectories of "src":
708    
709      - ml-nlffi-lib:
710           The utility library for programs using the FFI interface.
711           Here is the implementation of $/c.cm and its associated low-level
712           partners $/c-int.cm and $/memory.cm.
713      - ml-nlffigen:
714           A stand-alone program for generating ML glue code from C source
715           code.
716    
717    Building ml-nlffigen requires $/ckit-lib.cm.
718    
719    The config/install.sh script has been updates to do the Right Thing
720    (hopefully).
721    
722    Notice that the source tree for the C-Kit will not be put under "src"
723    but directly under the installation root directory.  (This is the
724    structure that currently exists on the CVS server when you check out
725    module "sml".)  Fortunately, config/install.sh knows about this oddity.
726    
727    Bugs: No documentation yet.
728    
729    ----------------------------------------------------------------------
730    Name: Matthias Blume
731    Date: 2001/05/09 16:35:00 EDT
732    Tag: blume-20010509-cpscontract
733    Description:
734    
735    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
736    wrapper/unwrapper elimination did not decrement usage counts and some
737    dead variables got overlooked by the dead-up logic.)
738    
739    ----------------------------------------------------------------------
740    Name: Lal George
741    Date: 2001/05/08  17:26:09 EDT
742    Tag: george-20010508-omit-frameptr
743    Description:
744    
745    Changes to implement the omit-frame-pointer optimization to support
746    raw C calls. For now, there is only support on the Intel x86, but
747    other architectures will follow as more experience is gained with this.
748    
749    
750    ----------------------------------------------------------------------
751    Name: Matthias Blume
752    Date: 2001/05/07 14:40:00 EDT
753    Tag: blume-20010507-proxies
754    Description:
755    
756    I made into "proxy libraries" all libraries that qualify for such a
757    change.  (A qualifying library is a library that has another library or
758    groups as its sole member and repeats that member's export list
759    verbatim.  A proxy library avoids this repetition by omitting its export
760    list, effectively inheriting the list that its (only) member exports.
761    See the CM manual for more explanation.)
762    The main effect is that explicit export lists for these libraries
763    do not have to be kepts in sync, making maintenance a bit easier.
764    
765    I also added copyright notices to many .cm-files.
766    
767    Last but not least, I made a new set of bootfiles.
768    
769    ----------------------------------------------------------------------
770    Name: Matthias Blume
771    Date: 2001/05/04 17:00:00 EDT
772    Tag: blume-20010504-cm-lsplit
773    Description:
774    
775    0. John merged pending changes to $/smlnj-lib.cm
776    
777    1. Allen's previous change accidentally backed out of one of Lal's
778       earlier changes.  I undid this mistake (re-introducing Lal's change).
779    
780    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
781       within the compiler where applicable.  There is some code simplification
782       because of that.
783    
784    3. The "split" phase (in FLINT) is now part of the default list of phases.
785       Compiler.Control.LambdaSplitting.* can be used to globally control the
786       lambda-splitting (cross-module-inlining) engine.  In addition to that,
787       it can now also be controlled on a per-source basis: CM has been taught
788       a new tool parameter applicable to ML source files.
789    
790       - To turn lambda-splitting off completely:
791            local open Compiler.Control.LambdaSplitting in
792                val _ = set Off
793            end
794       - To make "no lambda-splitting" the global default (but allow per-source
795         overriding); this is the initial setting:
796            local open Compiler.Control.LambdaSplitting in
797                val _ = set (Default NONE)
798            end
799       - To make "lambda-splitting with aggressiveness a" the global default
800         (and allow per-source overriding):
801            local open Compiler.Control.LambdaSplitting in
802                val _ = set (Default (SOME a))
803            end
804    
805       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
806         write (in the respective .cm-file):
807            a.sml (lambdasplitting:off)
808       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
809            a.sml (lambdasplitting:on)
810       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
811         <a> is a decimal non-negative integer):
812            a.sml (lambdasplitting:<a>)
813       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
814            a.sml (lambdasplitting:infinity)
815       - To use the global default for a.sml:
816            a.sml (lambdasplitting:default)
817         or simply
818            a.sml
819    
820    ----------------------------------------------------------------------
821    Name: Allen Leung
822    Date: 2001/05/04 01:57:00 EDT
823    Tag: leunga-20010504-sync
824    Description:
825    
826      MLRISC features.
827    
828      1. Fix to CMPXCHG instructions.
829      2. Changed RA interface to allow annotations in callbacks.
830      3. Added a new method to the stream interface to allow annotations updates.
831    
832    ----------------------------------------------------------------------
833    Name: Matthias Blume
834    Date: 2001/05/01 11:45:00 EDT
835    Tag: blume-20010501-pcedittmp
836    Description:
837    
838    Changed install.sh to use the current working directory instead of
839    /usr/tmp for a temporary file (pcedittmp).  The previous choice
840    of /usr/tmp caused trouble with MacOS X because of file premission
841    problems.
842    
843    ----------------------------------------------------------------------
844    Name: Matthias Blume
845    Date: 2001/04/20 11:10:00 EDT
846    Tag: blume-20010420-inMLflag
847    Description:
848    
849     - added vp_limitPtrMask to vproc-state.h
850       (for use by the raw-C-calls mechanism to implement proper interrupt
851        handling)
852     - made the ML compiler aware of various data-structure offsets so it
853       can generate code for accessing the vp_inML flag and vp_limitPtrMask
854     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
855       raw C-calls
856    
857    ----------------------------------------------------------------------
858    Name: Lal George
859    Date: 2001/04/20 09:15:28 EDT
860    Tag: george-20010420-macosX
861    Description:
862    
863     - Changes to port to Mac OS X; Darwin.
864    
865     - In the process I found that sqrt was broken on the PPC, because the
866       fsqrt instruction is not implemented.
867    
868    ----------------------------------------------------------------------
869    Name: Matthias Blume
870    Date: 2001/04/18 12:45:00 EDT
871    Tag: blume-20010418-ccalls
872    Description:
873    
874     - fixed two off-by-4 errors in the x86-specific c-calls implementation
875       (this bug prevented structure arguments containing pointers from being
876        passed correctly)
877     - changed the raw-C-call code in mlriscGen.sml in such a way that
878       structure arguments are represented as a pointer to the beginning
879       of the structure (instead of having a series of synthesized arguments,
880       one for each structure member)
881    
882     - made makeml script's verbosity level configurable via environment
883       variable (MAKEML_VERBOSITY)
884    
885     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
886       in rawmem-x86.sml; we are now using the real thing
887    
888    ----------------------------------------------------------------------
889    Name: Matthias Blume
890    Date: 2001/03/22 16:25:00 EST
891    Tag: blume-20010322-bootfiles
892    Description:
893    
894    Created a new set of bootfiles (for your automatic installation convenience).
895    
896    ----------------------------------------------------------------------
897    Name: Matthias Blume
898    Date: 2001/03/22 15:10:00 EST
899    Tag: blume-20010322-rawmem-parcm
900    Description:
901    
902    1. All "raw memory access" primitives for the new FFI are implemented now
903       (at least on the x86).
904    2. Some further cleanup of CM's parallel make mechanism.
905    
906    ----------------------------------------------------------------------
907    Name: Matthias Blume
908    Date: 2001/03/19 17:53:00 EST
909    Tag: blume-20010319-parallel
910    Description:
911    
912    Parallel make (using compile servers) now works again.
913    
914    To this end, CM.stabilize and CMB.make have been modified to work in
915    two passes when compile servers are attached:
916       1. Compile everything, do not perform stabilization; this pass
917          uses compile servers
918       2. Stabilize everything; this pass does not use compile servers
919    If there are no compile servers, the two passes are combined into one
920    (as before).  Splitting the passes increases the inherent parallelism
921    in the dependency graph because the entire graph including all
922    libraries is available at the same time.  This, in turn, improves
923    server utilization.  The downside is that the master process will
924    have to do some extra work after compilation is done (because for
925    technical reasons it must re-read all the binfiles during stabilization).
926    
927    ----------------------------------------------------------------------
928    Name: Matthias Blume
929    Date: 2001/03/16 12:22:00 EST
930    Tag: blume-20010316-bootfiles
931    Description:
932    
933    Created a new set of bootfiles (for your automatic installation convenience).
934    
935    ----------------------------------------------------------------------
936    Name: Matthias Blume
937    Date: 2001/03/16 11:00:00 EST
938    Tag: blume-20010316-MLTREE-fixup
939    Description:
940    
941    This is a minor fixup for an (untagged) earlier commit by Allen.
942    (A file was missing).
943    
944    ----------------------------------------------------------------------
945    Name: Allen Leung
946    Date: Mon Mar  5 18:54:57 EST 2001
947    Tag: leunga-20010305-cut-support
948    
949    1. New support for alternative control-flow in MLTREE.
950       Currently we support
951    
952          FLOW_TO(CALL ...., [k1,...,kn])
953    
954       This is needed for 'cuts to' in C-- and try/handle-like constructs
955       in Moby
956    
957       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
958    
959    2. Register Allocator
960    
961       Changes in interface [from Fermin, John]
962    
963    3. Alpha 8-bit SLL support [Fermin]
964    
965    4. All architectures
966    
967       A new module (ClusterExpandCopies) for expanding parallel copies.
968    
969    ----------------------------------------------------------------------
970    Name: Allen Leung
971    Date: 2001/02/27 23:07:00 EST
972    Tag: leunga-20010227-minor-stuff
973    
974    1. Alpha bug fix for CMOVNE
975    2. Handle mltree COND(..,FCMP ...,...)
976    3. Bug fix in simplifier
977    
978    ----------------------------------------------------------------------
979    Name: Matthias Blume
980    Date: 2001/01/30 17:50:00 EST
981    Tag: blume-20010130-sync
982    Description:
983    
984    This is just a minor update to sync my devel branch with the main brach.
985    The only visible change is the addition of some README files.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/01/12 23:30:00 JST
990    Tag: blume-20010112-bootfiles
991    Description:
992    
993    Made a new set of bootfiles that goes with the current state of the
994    repository.
995    
996    ----------------------------------------------------------------------
997    Name: Matthias Blume
998    Date: 2001/01/12 21:20:00 JST
999    Tag: blume-20010112-sync
1000    Description:
1001    
1002    I am just flushing out some minor changes that had accumulated in
1003    my private branch in order to sync with the main tree.  (This is
1004    mainly because I had CVS trouble when trying to merge _into_ my
1005    private branch.)
1006    
1007    Most people should be completely unaffected by this.
1008    
1009    ----------------------------------------------------------------------
1010    Name: Allen Leung
1011    Date: Thu Jan 11 21:03:00 EST 2001
1012    Tag: leunga-20010111-labexp=mltree
1013    Description:
1014    
1015    1.  Removed the type LabelExp and replace it by MLTree.
1016    2.  Rewritten mltree-simplify with the pattern matcher tool.
1017    3.  There were some bugs in alpha code generator which would break
1018        64-bit code generation.
1019    4.  Redo the tools to generate code with the
1020    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1021        are now generated by perl scripts.
1022    
1023    ----------------------------------------------------------------------
1024    Name: Matthias Blume
1025    Date: 2001/01/10 21:55:00 JST
1026    Tag: blume-20010110-rcc
1027    Description:
1028    
1029    The RCC stuff now seems to work (but only on the x86).
1030    This required hacking of the c-calls interface (and -implementation) in
1031    MLRISC.
1032    
1033    Normal compiler users should be unaffected.
1034    
1035    ----------------------------------------------------------------------
1036    Name: Matthias Blume
1037    Date: 2001/01/09 01:20:00 JST
1038    Tag: blume-20010109-rcc
1039    Description:
1040    
1041    This is a fairly big patch, flushing out a large number of pending
1042    changes that I made to my development copy over the last couple of days.
1043    
1044    Of practical relevance at this moment is a workaround for a pickling
1045    bug that Allen ran into the other day.  The cause of the bug itself is
1046    still unknown and it might be hard to fix it properly, but the
1047    workaround has some merits of its own (namely somewhat reducing pickling
1048    overhead for certain libraries).  Therefore, I think this solution should
1049    be satisfactory at this time.
1050    
1051    The rest of the changes (i.e., the vast majority) has to do with my
1052    ongoing efforts of providing direct support for C function calls from
1053    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1054    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1055    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1056    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1057    handle RCC.
1058    
1059    The last part (the changes to mlriscGen.sml) are still known to be
1060    wrong on the x86 and not implemented on all other architectures.  But
1061    the infrastructure is in place. I had to change a few functor
1062    signatures in the backend to be able to route the CCalls interface
1063    from MLRISC there, and I had to specialize the mltree type (on the
1064    x86) to include the necessary extensions. (The extensions themselves
1065    were already there and redy to go in MLRISC/x86).
1066    
1067    Everything should be very happy as soon as someone helps me with
1068    mlriscGen.sml...
1069    
1070    In any case, nothing of this should matter to anyone as long as the
1071    new primop is not being used (which is going to be the case unless you
1072    find it where I hid it :). The rest of the compiler is completely
1073    unaffected.
1074    
1075    ----------------------------------------------------------------------
1076    Name: Matthias Blume
1077    Date: 2001/01/05 00:30:00 JST
1078    Tag: blume-20010105-primops
1079    Description:
1080    
1081    Added some experimental support for work that I am doing right now.
1082    These changes mostly concern added primops, but there is also a new
1083    experimental C library in the runtime system (but currently not enabled
1084    anywhere except on Linux/X86).
1085    
1086    In the course of adding primops (and playing with them), I discovered that
1087    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1088    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1089    To recover, I made type information in INL_PRIM mandatory and changed
1090    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1091    has complete, correct type information (i.e., no bottom types).
1092    
1093    Since all these changes mean that we need new binfiles, I also bumped the
1094    version number to 110.32.1.
1095    
1096    ----------------------------------------------------------------------
1097    Name: Matthias Blume
1098    Date: 2000/12/30 22:10:00 JST
1099    Tag: blume-20001230-various
1100    Description:
1101    
1102    Added proxy libraries for MLRISC and let MLRISC libraries refer
1103    to each other using path anchors.  (See CM manual for explanation.)
1104    
1105    Updated CM documentation.
1106    
1107    Fixed some bugs in CM.
1108    
1109    Implemented "proxy" libraries (= syntactic sugar for CM).
1110    
1111    Added "-quiet" option to makeml and changed runtime system accordingly.
1112    
1113    Added cleanup handler for exportML to reset timers and compiler stats.
1114    
1115    ----------------------------------------------------------------------
1116    Name: Lal George
1117    Date: 2000/12/22 22:22:58 EST 2000
1118    Tag: Release_110_32
1119    Description:
1120    
1121            Infinite precision used throughout MLRISC.
1122            see MLRISC/mltree/machine-int.sig
1123    
1124    ----------------------------------------------------------------------
1125    Name: Matthias Blume
1126    Date: 2000/12/22 23:16:00 JST
1127    Tag: blume-20001222-warn
1128    Description:
1129    
1130    Corrected wording and formatting of some CM warning message which I
1131    broke in my previous patch.
1132    
1133    ----------------------------------------------------------------------
1134    Name: Matthias Blume
1135    Date: 2000/12/22 21:20:00 JST
1136    Tag: blume-20001222-anchorenv
1137    Description:
1138    
1139    Fixed CM's handling of anchor environments in connection with CMB.make.
1140    
1141    ----------------------------------------------------------------------
1142    Name: Matthias Blume
1143    Date: 2000/12/22 13:15:00 JST
1144    Tag: blume-20001222-cleanup
1145    Description:
1146    
1147    Removed src/cm/ffi which does not (and did not) belong here.
1148    
1149    ----------------------------------------------------------------------
1150    Name: Matthias Blume
1151    Date: 2000/12/21 23:55:00 JST
1152    Tag: blume-20001221-exn
1153    Description:
1154    
1155    Probably most important: CM no longer silently swallows all exceptions
1156    in the compiler.
1157    Plus: some other minor CM changes.  For example, CM now reports some
1158    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1159    
1160    ----------------------------------------------------------------------
1161    Name: Matthias Blume
1162    Date: 2000/12/15 00:01:05 JST
1163    Tag: blume-20001215-dirtool
1164    Description:
1165    
1166    - "dir" tool added.
1167    - improvements and cleanup to Tools structure
1168    - documentation updates
1169    
1170    ----------------------------------------------------------------------
1171    Name: Allen Leung
1172    Date: Thu Dec 14 03:45:24 EST 2000
1173    Description:
1174    Tag:  leunga-20001214-int-inf
1175    Description:
1176    
1177       In IntInf, added these standard functions, which are missing from our
1178    implementation:
1179    
1180        andb : int * int -> int
1181        xorb : int * int -> int
1182        orb  : int * int -> int
1183        notb : int -> int
1184         <<   : int * word -> int
1185        ~>>  : int * word -> int
1186    
1187       Not tested, I hope they are correct.
1188    
1189  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1190  Name: Allen Leung  Name: Allen Leung
1191  Date: Fri Dec  8 19:23:26 EST 2000  Date: Fri Dec  8 19:23:26 EST 2000

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