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[smlnj] Diff of /sml/trunk/HISTORY
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Diff of /sml/trunk/HISTORY

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revision 875, Tue Jul 10 21:19:41 2001 UTC revision 1399, Tue Sep 30 21:10:05 2003 UTC
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8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2003/09/30 16:10:00 CDT
18    Tag: blume-20030930-primio-bat
19    Description:
20    
21    1. Added openVector, nullRd, and nullWr to PRIM_IO.
22    2. Improved .bat files (for Win32 port) to make things work under Win95.
23       (thanks to Aaron S. Hawley for this one)
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume (blume (at) tti - c (dot) org)
27    Date: 2003/09/26 16:05:00 CDT
28    Tag: blume-20030926-wrappriv
29    Description:
30    
31    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
32    
33    ----------------------------------------------------------------------
34    Name: Matthias Blume (blume (at) tti - c (dot) org)
35    Date: 2003/09/26 15:00:00 CDT
36    Tag: blume-20030926-110_43_3
37    Description:
38    
39    - additional cleanup
40    - version number bump, NEW BOOTFILES
41    
42    ----------------------------------------------------------------------
43    Name: Matthias Blume (blume (at) tti - c (dot) org)
44    Date: 2003/09/26 12:00:00 CDT
45    Tag: blume-20030926-ppautoload
46    Description:
47    
48    I modified the read-eval-print loop so that the autoloader gets
49    invoked whenever the prettyprinter tries to look up a symbol that
50    is not currently defined in the toplevel environment but which
51    appears in CM's autoload registry.  As a result, we see far fewer of
52    those ?.Foo.Bar.xxx names in the prettyprinter's output.
53    
54    In addition to this I tried to clean up some pieces of the Basis
55    implementation (e.g., Socket, Word8Array) in order to prevent other
56    instances of these ?.Foo.Bar.xxx names from being printed.
57    
58    The mechanism that picks names for types still needs some work, though.
59    (Right now it seems that if there is a type A.t which is defined to
60    be B.u, but B is unavailable at toplevel, then A.t gets printed as
61    "?.B.u" although the perhaps more sensible solution would be to use
62    "A.t" in this case.  In other words, the prettyprinter should follow
63    a chain of DEFtycs not farther than there are corresponding toplevel
64    names in the current environment.)
65    
66    ----------------------------------------------------------------------
67    Name: Matthias Blume (blume (at) tti - c (dot) org)
68    Date: 2003/09/24 16:31:00 CDT
69    Tag: blume-20030924-installer
70    Description:
71    
72    Another installer tweak:  All the ML code for the installer is now
73    compiled during CMB.make and put into a little library called
74    $smlnj/installer.cm.  The installation then simply invokes
75    
76       sml -m $smlnj/installer.cm
77    
78    and everything happens automagically.
79    
80    Win32:  ML code senses value of environment variable SMLNJ_HOME.
81    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
82            and BINDIR.
83    
84    The new scheme guarantees that the ML code responsible for the installation
85    is in sync with the APIs of the main system.  Also, the installer is
86    somewhat faster because the installer script is precompiled.
87    
88    ----------------------------------------------------------------------
89    Name: Matthias Blume (blume (at) tti - c (dot) org)
90    Date: 2003/09/24 15:35:00 CDT
91    Tag: blume-20030924-synsock
92    Description:
93    
94    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
95    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
96    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
97    implementations of non-blocking operations from CML's Socket
98    structure.
99    
100    ----------------------------------------------------------------------
101    Name: Matthias Blume (blume (at) tti - c (dot) org)
102    Date: 2003/09/24 15:10:05 CDT
103    Tag: blume-20030924-sockets
104    Description:
105    
106    1. Fixed SOCKET API and implementation to match Basis spec.
107       This required changing the internal representation of sockets to one
108       that remembers (for each socket file descriptor) whether it is currently
109       blocking or non-blocking.  This state is maintained lazily (i.e., a system
110       call is made only if the state actually needs to change).
111    
112    2. OS-specific details of sockets were moved into separate files, thus
113       making it possible to unify the bulk of the socket implementations
114       between Unix and Win32.
115    
116    3. CML's socket API changed accordingly.
117       (Note that we need to remove non-blocking functions from this API
118       since they are redundant in the case of CML!)
119    
120    4. CML's socket implementation now makes use of non-blocking functions
121       provided by Basis, thus removing all OS-dependent code from this part
122       of CML.
123    
124    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
125    
126    ----------------------------------------------------------------------
127    Name: Matthias Blume (blume (at) tti - c (dot) org)
128    Date: 2003/09/22 12:10:00 CDT
129    Tag: blume-20030922-110_43_2
130    Description:
131    
132    Made a new interim version and bootfiles for developer's bootstrapping
133    convenience.
134    
135       110.43.2 -- NEW BOOTFILES
136    
137    ----------------------------------------------------------------------
138    Name: Matthias Blume (blume (at) tti - c (dot) org)
139    Date: 2003/09/19 15:55:00 CDT
140    Tag: blume-20030919-cmdir
141    Description:
142    
143    1. new-install.sh -> install.sh
144    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
145    3. tweaked installer so that another name instead of .cm can be chosen
146       at install time (by setting the CM_DIR_ARC environment variable
147       during installation); once installation is complete, the name is
148       fixed
149    
150    ----------------------------------------------------------------------
151    Name: Matthias Blume (blume (at) tti - c (dot) org)
152    Date: 2003/09/18 16:00:00 CDT
153    Tag: blume-20030918-110_43_1
154    Description:
155    
156    Made a new interim version and bootfiles for developer's bootstrapping
157    convenience.
158    
159       110.43.1 -- NEW BOOTFILES
160    
161    ----------------------------------------------------------------------
162    Name: Matthias Blume (blume (at) tti - c (dot) org)
163    Date: 2003/09/18 15:20:00 CDT
164    Tag: blume-20030918-misc
165    Description:
166    
167    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
168       this seems to be controversial at the moment) and used those in
169       Posix.ProcEnv.times.
170    
171    2. Added Time.{from,to}Nanoseconds to Time.
172    
173    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
174       For example, fromLargeInt never needs to look at more than 3 "big
175       digits" to get its 53 bits of precision.
176    
177    ----------------------------------------------------------------------
178    Name: Matthias Blume (blume (at) tti - c (dot) org)
179    Date: 2003/09/17 16:30:00 CDT
180    Tag: blume-20030917-real32-slices
181    Description:
182    
183    Added an entry to the primitive environment
184    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
185    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
186    
187    Removed some of the "magic" constants in real64.sml and replaced them
188    with code that generates these values from their corresponding
189    integer counterparts.
190    
191    Made all(?) the slice-related changes to the Basis and made everything
192    compile again...
193    
194    ----------------------------------------------------------------------
195    Name: Matthias Blume (blume (at) tti - c (dot) org)
196    Date: 2003/09/15 17:45:00 CDT
197    Tag: blume-20030915-rbase
198    Description:
199    
200    Fixed bug in Real.fromLargeInt.
201    
202    ----------------------------------------------------------------------
203    Name: Matthias Blume (blume (at) tti - c (dot) org)
204    Date: 2003/09/13 18:11:00 CDT
205    Tag: blume-20030913-libinstall
206    Description:
207    
208    Minor bugfix in config/libinstall (set anchor with path to
209    standalone tool after installing it, otherwise libraries that
210    need ml-lex or ml-yacc won't compile the first time the installer
211    runs).
212    
213    ----------------------------------------------------------------------
214    Name: Matthias Blume (blume (at) tti - c (dot) org)
215    Date: 2003/09/12 11:45:00 CDT
216    Tag: blume-20030912-various
217    Description:
218    
219     - fixed bug in Real.toLargeInt
220     - fixed bug in Posix.ProcEnv.times
221     - changed inputLine functions to return an option
222     - minor installer improvements / bugfixes
223     - changed default @SMLalloc parameter for x86/celeron to 64k
224    
225    ----------------------------------------------------------------------
226    Name: Matthias Blume (blume (at) tti - c (dot) org)
227    Date: 2003/09/09 22:00:00 CDT
228    Tag: Release_110_43
229    Description:
230    
231        New working release 110.43.  New bootfiles.
232    
233    ----------------------------------------------------------------------
234    Name: Matthias Blume (blume (at) tti - c (dot) org)
235    Date: 2003/09/09 19:20:00 CDT
236    Tag: blume-20030909-installer
237    Description:
238    
239    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
240    Modified config/install.bat to take advantage of it.  Also modified
241    config/install.sh (and called it config/new-install.sh) to take advantage
242    of it on Unix systems.  (The SML code is (supposed to be) platform-
243    independent.)
244    
245    The installer can now install everything under Win32
246    as well as under *nix as long as it compiles.
247    
248    Other changes:
249    
250      - made CML compile again under Win32
251      - made eXene compile under Win32 (by providing a fake structure UnixSock
252        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
253      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
254        same as type int;  under Win32 it isn't
255      - fixed some slice-related problems in the win32-specific parts of CML
256      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
257        (under Win32, the volume name is case-insensitive, and the
258        OS.Path code compares volume names for equality)
259    
260    ----------------------------------------------------------------------
261    Name: Matthias Blume (blume (at) tti - c (dot) org)
262    Date: 2003/09/08 11:55:00 CDT
263    Tag: blume-20030908-fullpath
264    Description:
265    
266    Made Win32 version of OS.FileSys.fullPath return current directory
267    when given an empty string.  This is what the spec says, and incidentally,
268    CM depends on it.  (CM otherwise goes into an infinite loop in certain
269    cases when presented with the name of a non-existing .cm file.)
270    
271    ----------------------------------------------------------------------
272    Name: Matthias Blume (blume (at) tti - c (dot) org)
273    Date: 2003/09/04 16:30:00 CDT
274    Tag: blume-20030905-slices-etc
275    Description:
276    
277      1. Changed interface to vectors and arrays in Basis to match
278         (draft) Basis spec.
279      2. Added signatures and implementations of slices according to
280         Basis spec.
281      3. Edited source code throughout the system to make it compile again
282         under 1. and 2.  (In some cases code had to be added to have it
283         match the new signatures.)
284      4. MLRISC should be backward-compatible: the copies of the originals
285         of files that needed to change under 3. were retained, the .cm files
286         check the compiler version number and use old versions when
287         appropriate.
288      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
289         dirstream -> string option (in accordance with Basis spec).
290      6. When generating code that counts lines, ml-lex used function
291         CharVector.foldli, taking advantage of its old interface.
292         This has been replaced with the corresponding code from
293         CharVectorSlice.  (html-lex must be re-lexed!)
294      7. BitArray in smlnj-lib/Util has been extended/modified to match the
295         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
296      8. Removed temporary additions (fromInternal, toInternal) from the
297         (now obsolete) IntInf in smlnj-lib/Util.
298      9. Cleaned up structure Byte.
299     10. Added localOffset, scan, and fromString to Date (according to spec).
300         Cleaned/corrected implementation of Date.
301         (Still need to check for correctness; implement better canonicalizeDate.)
302     11. Added "scan" to signature IEEE_REAL.
303     12. Some improvements to IntInf [in particular: efficiency-hack for
304         mod and rem when second operand is 2 (for parity checks).]
305     13. Changed representation of type Time.time, using a single IntInf.int
306         value counting microseconds.  This considerably simplified the
307         implementation of structure Time.  We now support negative time
308         values; scan and fromString handle signs.
309     14. Functor PrimIO now takes two additional arguments (VectorSlice and
310         ArraySlice).
311    
312    ----------------------------------------------------------------------
313    Name: Matthias Blume (blume (at) tti - c (dot) org)
314    Date: 2003/08/28 17:00:00 CDT
315    Tag: blume-20030828-intinf
316    Description:
317    
318    This is a major update which comes with a version number bump
319    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
320    and an implementation of IntInf in the Basis.
321    
322    There are a fairly large number of related changes and updates throughout
323    the system:
324    
325    Basis:
326            - Implemented IntInf.
327            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
328            - Added some missing Real64 operations, most notably Real.toLargeInt.
329            - Added FixedInt as a synonym for Int32.
330    
331    compiler:
332            * Added support for a built-in intinf type.
333              - literals
334              - pattern matching
335              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
336              - overloading on literals and operations
337    
338            This required adding a primitive type intinf, some additional
339            primops, and implementations for several non-trivial intinf
340            operations in Core.  (The intinf type is completely abstract
341            to the compiler; all operations get delegated back to the Core.)
342    
343            * Intinf equality is handled by polyequal.  However, the compiler
344            does not print its usual warning in this case (since polyequal
345            is the right thing to do there).
346    
347            * Improved the organization of structure InlineT.
348    
349            * A word about conversion primops:
350            If conversions involving intinf do not cancel out during
351            CPS contract, then the compiler must insert calls to Core functions.
352            Since all core access must be resolved already during the FLINT
353            translate phase, it would be too late a the time of CPS contract
354            to add new Core calls.  For this reason, conversion primops
355            for intinf carry two arguments:  1. the numeric argument that
356            they are supposed to convert, and 2. the Core function that
357            can help with this conversion if necessary.  If CPS contract
358            eliminates a primop, then the associated Core function becomes
359            dead and goes away.  Intinf conversion primops that do not get
360            eliminated by CPS contract get rewritten into calls of their
361            core functions by a separate, new phase.
362    
363    interactive system:
364            - Control.Print.intinfDepth controls max length of intinf constants
365            being printed. (Analogous to Control.Print.stringDepth.)
366            - Cleanup in printutil and pputil: got rid of unused stuff and
367            duplicates; replaced some of the code with code that makes better
368            use of library functionality.
369    
370    CM:
371            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
372            are no longer silent.
373    
374    CKIT:
375            Fixed mismatched uses of Int32 and LargeInt.  I always decided
376            in favor of LargeInt -- which is now the same as IntInf.
377            CKIT-knowledgable people should check whether this is what's
378            intended and otherwise change things back to using Int32 or
379            FixedInt.
380    
381    Throughout the code:
382            Started using IntInf.int literals and built-in operations
383            (e.g., comparison with 0) where this seems appropriate.
384    
385    
386    ----------------------------------------------------------------------
387    Name: Dave MacQueen (dbm@cs.uchicago.edu)
388    Date: 2003/08/13 11:36:00 CDT
389    Tag: dbm-20030813-mcz-merge1
390    Description:
391    
392    Merging changes from the mcz-branch development branch into trunk.
393    These changes involve replacement of the emulated old prettyprinter
394    interface with direct use of the SML/NJ Lib PP library, and fixing
395    of a couple of bugs (895, 1186) relating to error messages.  A new
396    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
397    has been added.
398    
399    ----------------------------------------------------------------------
400    Name: Matthias Blume (blume (at) tti - c (dot) org)
401    Date: 2003/08/11 15:45:00 CDT
402    Tag: blume-20030811-windows
403    Description:
404    
405    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
406    
407        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
408    
409    This patch restores SML/NJ's ability to run under win32.  There are a
410    number of changes, including fixes for several bugs that had gone
411    unnoticed until now:
412    
413      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
414        trying to run the win32 version from within cygwin.)
415    
416      - There are a number of simple .bat scripts that substitute for their
417        corresponding Unix shell-scripts.  (See below.)
418    
419      - The internals of ml-build have been modified slightly.  The main
420        difference is that instead of calling ".link-sml" (or link-sml.bat)
421        using OS.Process.system, the ML process delegates this task back
422        to the script.  Otherwise problems arise in mixed environments such
423        as Cygwin where scripts look and work like Unix scripts, but
424        where OS.Process.system cannot run them.
425    
426      - In CM, the srcpath pickler used native pathname syntax -- which
427        is incorrect in the case of cross-compilation.  The new pickle format
428        is independent of platform-specific naming conventions.
429    
430      - Path configuration files (such as lib/pathconfig) can now choose
431        between native and standard syntax.  Placing a line of the form
432    
433            standard!
434    
435        into the file causes all subsequent paths to be interpreted using
436        CM standard pathname syntax (= Unix conventions); a line
437    
438            native!
439    
440        switches back to native style.  This was needed so that
441        path config files can be written portably, see src/system/pathconfig.
442    
443      - Runtime system:
444    
445          - win32-filesys.c:  get_file_time and set_file_time now
446            access modification time, not creation time.
447    
448          - I/O code made aware of new array representation.
449    
450          - Bug fixes in X86.prim.masm.
451    
452       - src/system/makeml made aware of win32. (For use under cygwin
453            and other Unix-environments for windows.)
454    
455       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
456         which caused BinIO.inputAll to fail consistently.
457    
458    .bat scripts:
459    
460       Windows .bat scripts assume that SMLNJ_HOME is defined.
461    
462       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
463         applications (sml, ml-yacc, ml-lex).
464       - ml-build.bat: analogous to ml-build.
465       - config\install.bat:  Analogous to config/install.sh.  This requires
466         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
467         (nmake etc. must be on the path, and vcvars32 must have been run.)
468         Moreover, sources for ml-lex and ml-yacc need to exist under src,
469         and the bootfile hierarchy must have been unpacked under
470         sml.boot.x86-win32.
471         The script is very primitive and does a poor job at error checking.
472         It only installs the base system, ml-lex, and ml-yacc.  No other
473         libraries are being installed (i.e., you get only those that
474         are part of the compiler.)
475       - link-sml.bat:  analogous to .link-sml, but not currently used
476    
477    Unrelated bug fixes:
478    
479      - ml-nlffigen now exports structures ST_* corresponding to incomplete
480        types.
481      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
482        otherwise.)
483    
484    ----------------------------------------------------------------------
485    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
486    Date: 2003/06/17
487    Tag: macqueen-20030617-bug895
488    Description:
489    
490    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
491    Tag will be used for new development branch (mcz-branch) for
492    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume (blume (at) tti - c (dot) org)
496    Date: 2003/05/27 16:55:00 CDT
497    Tag: blume-20030527-polyeq
498    Description:
499    
500    Tried to eliminated most cases of polymorphic equality.
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume (blume (at) tti - c (dot) org)
504    Date: 2003/05/21 17:45:00 CDT
505    Tag: blume-20030517-complete
506    Description:
507    
508    Two changes:
509    
510      1. Added a flag for controlling whether non-exhaustive bindings will
511         be treated as errors (default is false).
512      2. Cleaned up the *entire* source tree so that CMB.make goes through
513         without a single non-exhaustive match- or bind warning.
514    
515    ----------------------------------------------------------------------
516    Name: Matthias Blume (blume (at) tti - c (dot) org)
517    Date: 2003/05/17 10:20:00 CDT
518    Tag: blume-20030517-absyn
519    Description:
520    
521    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
522    
523       This mainly affects the quality of error messages.  However, some
524       of the code is now more straightforward than before. (Treatment of
525       the above four constructs in translate.sml is much simpler than
526       the "macro-expansion" that was going on before.  Plus, the mach-
527       compiler no longer gets invoked just to be able to compile an
528       if-expression.)
529    
530    2. The ErrorMsg.Error exception is now caught and absorbed by the
531       interactive loop.
532    
533    ----------------------------------------------------------------------
534    Name: Allen Leung
535    Date: 2003/05/16 13:05:00 CDT
536    Tag: leunga-20030516-cygwin-runtime
537    Description:
538    
539        Ported the runtime system to cygwin, which uses the unix
540    x86-unix bin files.  Missing/buggy features:
541    
542       o getnetbyname, getnetbyaddr: these functions seem to be missing in
543         the Cygwin library.
544       o Ctrl-C handling may be flaky.
545       o Windows system calls and Windows I/O are not supported.
546    
547       A new set of binfiles is located at:
548    
549         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
550    
551       This is only needed for bootstrapping the cygwin version of smlnj.
552       Other x86 versions can use the existing binfiles.
553    
554    ----------------------------------------------------------------------
555    Name: Matthias Blume
556    Date: 2003/04/08 15:42:00 CDT
557    Tag: blume-20030408-listpair
558    Description:
559    
560    1. Added a target 'mlrisc' to installer.
561    
562    2. Added missing elements to structure ListPair.
563    
564    ----------------------------------------------------------------------
565    Name: Allen Leung
566    Date: 2003/01/07 10:40:00 EST
567    Tag: leunga-20030107-int-rem
568    Description:
569    
570    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
571    The arguments to the SUBL instruction were swapped.
572    
573    ----------------------------------------------------------------------
574    Name: Matthias Blume
575    Date: 2002/12/12 16:25:00 EST
576    Tag: blume-20021212-risc-ra
577    Description:
578    
579    Fixed a serious bug in the rewrite code for FP spilling/reloading that
580    sent the RA into an infinite loop when floating point registers get
581    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
582    110.37 and 110.38.)
583    There was another set of potential problems related to the handling of
584    MLRISC annotations (but those did not yet cause real problems, apparently).
585    
586    ----------------------------------------------------------------------
587    Name: Matthias Blume
588    Date: 2002/12/06 22:40:00 EST
589    Tag: blume-20021206-cm-fileid
590    Description:
591    
592    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
593    This fixes the problem of CM getting confused by files that suddenly
594    change their identity (e.g., by getting unlinked and recreated by some
595    text editor such as vi).  There might be a better/cheaper/cleaner way
596    of doing this, but for now this will have to do.
597    
598    ----------------------------------------------------------------------
599    Name: Matthias Blume
600    Date: 2002/10/28 09:50:00 EST
601    Tag: blume-20021028-typecheck
602    Description:
603    
604    Exported structure Typecheck from $smlnj/viscomp/core.cm.
605    
606    ----------------------------------------------------------------------
607    Name: Matthias Blume
608    Date: 2002/10/17 09:10:00 EDT
609    Tag: Release_110_42
610    Description:
611    
612    In good old tradition, there has been a slight hiccup so that we have
613    to patch 110.42 after the fact.   The old release tag has been replaced
614    (see below).
615    
616    The change solves a problem with two competing approaches the
617    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
618    each other's way.
619    
620    This change only affects the runtime system code and the installer script.
621    (No new bootfiles.)
622    
623    ----------------------------------------------------------------------
624    Name: Matthias Blume
625    Date: 2002/10/16 12:00:00 EDT
626    Tag: Release_110_42_removed
627    Description:
628    
629    New working release.  New bootfiles.
630    
631    ----------------------------------------------------------------------
632    Name: Matthias Blume
633    Date: 2002/10/10 13:10:00 EDT
634    Tag: blume-20021010-ppc-divs
635    Description:
636    
637    The mltree operator DIVS must be implemented with an overflow check on
638    the PPC because the hardware indicates divide-by-zero using "overflow" as
639    well.
640    
641    ----------------------------------------------------------------------
642    Name: Matthias Blume
643    Date: 2002/07/23 11:45:00
644    Tag: blume-20020723-smlnj-home
645    Description:
646    
647    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
648    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
649    CM_PATHCONFIG is also set), the path configuration file is assumed
650    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
651    the entire tree to some other place and everything will "just work".
652    
653    (Companion commands such as ml-build and ml-makedepend also sense this
654    variable.)
655    
656    ----------------------------------------------------------------------
657    Name: Matthias Blume
658    Date: 2002/07/12 21:19:00 EDT
659    Tag: blume-20020712-liveness
660    Description:
661    
662    Exported two useful "step" functions from liveness module (MLRISC).
663    
664    ----------------------------------------------------------------------
665    Name: Matthias Blume
666    Date: 2002/07/05 16:00 EDT
667    Tag: Release_110_41
668    Description:
669    
670    New working release.  New bootfiles.
671    
672    ----------------------------------------------------------------------
673    Name: Matthias Blume
674    Date: 2002/07/05 10:25:00 EDT
675    Tag: blume-20020705-btimp
676    Description:
677    
678    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
679    other clients can set up backtracing support.
680    
681    ----------------------------------------------------------------------
682    Name: Matthias Blume
683    Date: 2002/06/25 17:23:00 EDT
684    Tag: blume-20020625-fpmax
685    Description:
686    
687    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
688    case.  (The sense of the isNaN test was reversed -- which made min and
689    max always return their first argument.)
690    
691    ----------------------------------------------------------------------
692    Name: Matthias Blume
693    Date: 2002/06/11
694    Tag: blume-20020611-unixpath
695    Description:
696    
697    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
698    
699    ----------------------------------------------------------------------
700    Name: Matthias Blume
701    Date: 2002/06/10 16:35:00 EDT
702    Tag: blume-20020610-ieeereal
703    Description:
704    
705    I back-ported my implementation of IEEEReal.fromString from the
706    idlbasis-devel branch so that we can test it.
707    
708    Another small change is that ppDec tries to give more information
709    than just "<sig>" in the case of functors.  However, this code is
710    broken in some mysterious way if the functor's body's signature
711    has not been declared by ascription but gets inferred from the
712    implementation.  This needs fixing...
713    
714    ----------------------------------------------------------------------
715    Name: Matthias Blume
716    Date: 2002/05/31
717    Tag: blume-20020531-btrace-mode
718    Description:
719    
720    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
721    the wayside when I switched over to using Controls everywhere.)
722    
723    ----------------------------------------------------------------------
724    Name: Lal George
725    Date: 2002/05/23 12:21:40 EDT
726    Tag: george-20020523-visual-labels
727    Description:
728    
729    Labels are now displayed in the graphical output to make
730    the fall-through and target blocks obvious.
731    
732    ----------------------------------------------------------------------
733    Name: Matthias Blume
734    Date: 2002/05/22 11:03:00 EDT
735    Tag: blume-20020522-shrink
736    Description:
737    
738    John tweaked yesterday's fix for 1131 to handle an out-of-memory
739    situation that comes up when allocating huge arrays.
740    
741    ----------------------------------------------------------------------
742    Name: Matthias Blume
743    Date: 2002/05/21 16:00:00 EDT
744    Tag: Release_110_40
745    Description:
746    
747    New working release (110.40).  New bootfiles.
748    
749    [Also: John Reppy fixed GC bug 1131.]
750    
751    ----------------------------------------------------------------------
752    Name: Matthias Blume
753    Date: 2002/05/21 12:35:00 EDT
754    Tag: blume-20020521-cmdoc
755    Description:
756    
757    CM documentation update.
758    
759    ----------------------------------------------------------------------
760    Name: Matthias Blume
761    Date: 2002/05/21 10:55:00 EDT
762    Tag: blume-20020521-misc
763    Description:
764    
765    - John tweaked runtime to be silent on heap export (except when
766      GC messages are on).
767    - I added a few more things (cross-compiling versions of CMB) to
768      config/preloads (as suggestions).
769    
770    ----------------------------------------------------------------------
771    Name: Matthias Blume
772    Date: 2002/05/20 22:25:00 EDT
773    Tag: blume-20020520-controls
774    Description:
775    
776    - Added ControlUtil structure to control-lib.cm.
777    - Use it throughout.
778    - Used Controls facility to define MLRISC controls (as opposed to
779      registering MLRISC control ref cells with Controls after the fact)
780    - Fixed messed-up controls priorities.
781    
782    * Removed again all the stuff from config/preloads that one wouldn't
783      be able to preload at the time the initial heap image is built.
784      (Many libraries, e.g., CML, do not exist yet at this time.  The
785       only libraries that can be preloaded via config/preloads are those
786       that come bundled with the bootfiles.)
787    
788    ----------------------------------------------------------------------
789    Name: Matthias Blume
790    Date: 2002/05/20 10:59:00 EDT
791    Tag: blume-20020520-preloads
792    Description:
793    
794    Added a lot of commented-out suggestions for things to be included
795    in config/preloads.
796    
797    ----------------------------------------------------------------------
798    Name: Allen Leung
799    Date: 2002/05/18 14:20:00 EDT
800    Tag: leunga-20020518-mdl
801    Description:
802    
803    o Made the mdl tool stuff compile and run again.
804    o I've disabled all the stuff that depends on RTL specifications; they
805      are all badly broken anyway.
806    
807    ----------------------------------------------------------------------
808    Name: Matthias Blume
809    Date: 2002/05/17 16:49:00 EDT
810    Tag: blume-20020517-controls
811    Description:
812    
813    0. John Reppy made several modifications to the SML/NJ library.
814       In particular, there is a shiny new controls-lib.cm.
815    
816    1. Pushed new controls interface through compiler so that everything
817       compiles again.
818    
819    2. Added FormatComb and FORMAT_COMB to the CML version of the
820       SML/NJ library (so that CML compiles again).
821    
822    3. Modified init scripts because XXX_DEFAULT environment variables
823       are no longer with us.  (Boot-time initialization is now done
824       using the same environment variables that are also used for
825       startup-time initialization of controls.)
826    
827    ----------------------------------------------------------------------
828    Name: Lal George
829    Date: 2002/05/15 09:20:10 EDT
830    Tag: george-20020515-pseudo-op-decls
831    Description:
832    
833            All pseudo-ops emitted before the first segment declaration
834    such as TEXT, DATA, and BSS directives are assumed to be global
835    declarations and are emitted first in the assembly file. This is
836    useful in a number of situations where one has pseudo-ops that are not
837    specific to any segment, and also works around the constraint that one
838    cannot have client pseudo-ops in the TEXT segment.
839    
840            Because no segment is associated with these declarations it is
841    an error to allocate any space or objects before the first segment
842    directive and an exception will be raised. However, we cannot make
843    this check for client pseudo-ops.
844    
845            These top level declarations are a field in the CFG graph_info.
846    In theory you can continue to add to this field after the CFG has been
847    built -- provided you know what you are doing;-)
848    
849    ----------------------------------------------------------------------
850    Name: Matthias Blume
851    Date: 2002/05/13 16:40:00 EDT
852    Tag: blume-20020513-pp-etc
853    Description:
854    
855    A few minor bugfixes:
856    
857      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
858        (Bogus printouts for redefined bindings still occur.  Compiler
859        bug should no longer occur now.  We need to redo the prettyprinter
860        from scratch.)
861    
862      - CM pathname printer now also adds escape sequences for ( and )
863    
864      - commend and docu fixes for ml-nlffi
865    
866    ----------------------------------------------------------------------
867    Name: Matthias Blume
868    Date: 2002/05/10 16:40:00 EDT
869    Tag: blume-20020510-erg-textio
870    Description:
871    
872    Applied the following bugfix provided by Emden Gansner:
873    
874        Output is corrupted when outputSubstr is used rather than output.
875    
876        The problem occurs when a substring
877    
878            ss = (s, dataStart, dataLen)
879    
880        where dataStart > 0, fills a stream buffer with avail bytes left.
881        avail bytes of s, starting at index dataStart, are copied into the
882        buffer, the buffer is flushed, and then the remaining dataLen-avail
883        bytes of ss are copied into the beginning of the buffer. Instead of
884        starting this copy at index dataStart+avail in s, the current code
885        starts the copy at index avail.
886    
887        Fix:
888        In text-io-fn.sml, change line 695 from
889             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
890        to
891             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
892    
893    ----------------------------------------------------------------------
894    Name: Matthias Blume
895    Date: 2002/04/12 13:55:00 EDT
896    Tag: blume-20020412-assyntax
897    Description:
898    
899    1. Grabbed newer assyntax.h from the XFree86 project.
900    2. Fiddled with how to compile X86.prim.asm without warnings.
901    3. (Very) Minor cleanup in CM.
902    
903    ----------------------------------------------------------------------
904    Name: Matthias Blume
905    Date: 2002/04/01 (no joke!) 17:07:00 EST
906    Tag: blume-20020401-x86div
907    Description:
908    
909    Added full support for div/mod/rem/quot on the x86, using the machine
910    instruction's two results (without clumsily recomputing the remainder)
911    directly where appropriate.
912    
913    Some more extensive power-of-two support was added to the x86 instruction
914    selector (avoiding expensive divs, mods, and muls where they can be
915    replaced with cheaper shifts and masks).  However, this sort of thing
916    ought to be done earlier, e.g., within the CPS optimizer so that
917    all architectures benefit from it.
918    
919    The compiler compiles to a fixed point, but changes might be somewhat
920    fragile nevertheless.  Please, report any strange things that you might
921    see wrt. div/mod/quot/rem...
922    
923    ----------------------------------------------------------------------
924    Name: Matthias Blume
925    Date: 2002/03/29 17:22:00
926    Tag: blume-20020329-div
927    Description:
928    
929    Fixed my broken div/mod logic.  Unfortunately, this means that the
930    inline code for div/mod now has one more comparison than before.
931    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
932    The problem was with quotient = 0, because that alone does not tell
933    us which way the rounding went.  One then has to look at whether
934    remainder and divisor have the same sign...  :(
935    
936    Anyway, I replaced the bootfiles with fresh ones...
937    
938    ----------------------------------------------------------------------
939    Name: Matthias Blume
940    Date: 2002/03/29 14:10:00 EST
941    Tag: blume-20020329-inlprims
942    Description:
943    
944    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
945    
946    Primops have changed. This means that the bin/boot-file formats have
947    changed as well.
948    
949    To make sure that there is no confusion, I made a new version.
950    
951    
952    CHANGES:
953    
954    * removed REMT from mltree (remainder should never overflow).
955    
956    * added primops to deal with divisions of all flavors to the frontend
957    
958    * handled these primops all the way through so they map to their respective
959      MLRISC support
960    
961    * used these primops in the implementation of Int, Int32, Word, Word32
962    
963    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
964    
965    * parameterized INLMIN, INLMAX, and INLABS by a numkind
966    
967    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
968      floating point
969    
970    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
971      and Real (but Real.abs maps to a separate floating-point-only primop)
972    
973    
974    TODO items:
975    
976    * Hacked Alpha32 instruction selection, disabling the selection of REMx
977      instructions because the machine instruction encoder cannot handle
978      them.  (Hppa, PPC, and Sparc instruction selection did not handle
979      REM in the first place, and REM is supported by the x86 machine coder.)
980    
981    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
982      selection phase.  (The two can be streamlined because the hardware
983      delivers both quotient and remainder at the same time anyway.)
984    
985    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
986      (Currently the behavior is inconsistent both across architectures and
987      wrt. the draft Basis spec.)
988    
989    * Word8 should eventually be handled natively, too.
990    
991    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
992      as if there currently is no execution path that could trigger it in
993      SML/NJ.  (The assumptions underlying functions arith and promotable do not
994      hold for things like multiplication and division.)
995    
996    ----------------------------------------------------------------------
997    Name: Matthias Blume
998    Date: 2002/03/27 16:27:00 EST
999    Tag: blume-20020327-mlrisc-divisions
1000    Description:
1001    
1002    Added support for all four division operations (ML's div, mod, quot,
1003    and rem) to MLRISC.  In the course of doing so, I also rationalized
1004    the naming (no more annoying switch-around of DIV and QUOT), by
1005    parameterizing the operation by div_rounding_mode (which can be either
1006    DIV_TO_ZERO or DIV_TO_NEGINF).
1007    
1008    The generic MLTreeGen functor takes care of compiling all four
1009    operations down to only round-to-zero div.
1010    
1011    Missing pieces:
1012    
1013      * Doing something smarter than relying on MLTreeGen on architectures
1014        like, e.g., the x86 where hardware division delivers both quotient and
1015        remainder at the same time.  With this, the implementation of the
1016        round-to-neginf operations could be further streamlined.
1017    
1018      * Remove inlining support for div/mod/rem from the frontend and replace it
1019        with primops that get carried through to the backend.  Do this for all
1020        int and word types.
1021    
1022    ----------------------------------------------------------------------
1023    Name: Matthias Blume
1024    Date: 2002/03/25 17:25:00 EST
1025    Tag: blume-20020325-divmod
1026    Description:
1027    
1028    I improved (hopefully without breaking them) the implementation of Int.div,
1029    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1030    advantage of the following observations:
1031    
1032      Let  q = x quot y      r = x rem y
1033           d = x div  y      m = x mod y
1034    
1035    where "quot" is the round-to-zero version of integer division that
1036    hardware usually provides.  Then we have:
1037    
1038         r = x - q * y        where neither the * nor the - will overflow
1039         d = if q >= 0 orelse x = q * y then q else q - 1
1040                              where neither the * nor the - will overflow
1041         m = if q >= 0 orelse r = 0 then r else r + y
1042                              where the + will not overflow
1043    
1044    This results in substantial simplification of the generated code.
1045    The following table shows the number of CFG nodes and edges generated
1046    for
1047            fun f (x, y) = x OPER y
1048            (* with OPER \in div, mod, quot, rem *)
1049    
1050    
1051        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1052        --------------------------------------------------------
1053         div |         24 |         39 |         12 |         16
1054         mod |         41 |         71 |         12 |         16
1055        quot |          8 |         10 |          8 |         10
1056         rem |         10 |         14 |          8 |         10
1057    
1058    
1059    ----------------------------------------------------------------------
1060    Name: Matthias Blume
1061    Date: 2002/03/25 22:06:00 EST
1062    Tag: blume-20020325-cprotobug
1063    Description:
1064    
1065    Fixed a bug in cproto (c prototype decoder).
1066    
1067    ----------------------------------------------------------------------
1068    Name: Matthias Blume
1069    Date: 2002/03/25 16:00:00 EST
1070    Tag: blume-20020325-raw-primops
1071    Description:
1072    
1073    I did some cleanup to Allen's new primop code and
1074    replaced yesterday's bootfiles with new ones.
1075    (But they are stored in the same place.)
1076    
1077    ----------------------------------------------------------------------
1078    Name: Matthias Blume
1079    Date: 2002/03/24 22:40:00 EST
1080    Tag: blume-20020324-bootfiles
1081    Description:
1082    
1083    Made the bootfiles that Allen asked for.
1084    
1085    ----------------------------------------------------------------------
1086    Name: Allen Leung
1087    Date: 2002/03/23 15:50:00 EST
1088    Tag: leunga-20020323-flint-cps-rcc-primops
1089    Description:
1090    
1091      1. Changes to FLINT primops:
1092    
1093        (* make a call to a C-function;
1094         * The primop carries C function prototype information and specifies
1095         * which of its (ML-) arguments are floating point. C prototype
1096         * information is for use by the backend, ML information is for
1097         * use by the CPS converter. *)
1098      | RAW_CCALL of { c_proto: CTypes.c_proto,
1099                       ml_args: ccall_type list,
1100                       ml_res_opt: ccall_type option,
1101                       reentrant : bool
1102                     } option
1103       (* Allocate uninitialized storage on the heap.
1104        * The record is meant to hold short-lived C objects, i.e., they
1105        * are not ML pointers.  With the tag, the representation is
1106        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1107        *)
1108      | RAW_RECORD of {tag:bool,sz:int}
1109      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1110    
1111      2.  These CPS primops are now overloaded:
1112    
1113           rawload of {kind:numkind}
1114           rawstore of {kind:numkind}
1115    
1116          The one argument form is:
1117    
1118             rawload {kind} address
1119    
1120          The two argument form is:
1121    
1122             rawload {kind} [ml object, byte-offset]
1123    
1124      3. RAW_CCALL/RCC now takes two extra arguments:
1125    
1126         a. The first is whether the C call is reentrant, i.e., whether
1127            ML state should be saved and restored.
1128         b. The second argument is a string argument specifying the name of
1129            library and the C function.
1130    
1131         These things are currently not handled in the code generator, yet.
1132    
1133      4. In CProto,
1134    
1135         An encoding type of "bool" means "ml object" and is mapped into
1136         C prototype of PTR.  Note that "bool" is different than "string",
1137         even though "string" is also mapped into PTR, because "bool"
1138         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1139    
1140      5. Pickler/unpicker
1141    
1142         Changed to handle RAW_RECORD and newest RAW_CCALL
1143    
1144      6. MLRiscGen,
1145    
1146         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1147         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1148            in the file CodeGen/cpscompile/cps-c-calls.sml
1149    
1150      7. Added the conditional move operator
1151    
1152             condmove of branch
1153    
1154         to cps.  Generation of this is still buggy so it is currently
1155         disabled.
1156    
1157    ----------------------------------------------------------------------
1158    Name: Lal George
1159    Date: 2002/03/22 14:18:25 EST
1160    Tag: george-20020322-cps-branch-prob
1161    Description:
1162    
1163    Implemented the Ball-Larus branch prediction-heuristics, and
1164    incorporated graphical viewers for control flow graphs.
1165    
1166    Ball-Larus Heuristics:
1167    ---------------------
1168    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1169    
1170    By design it uses the Dempster-Shafer theory for combining
1171    probabilities.  For example, in the function:
1172    
1173        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1174    
1175    the ball-larus heuristics predicts that the n=0 is unlikely
1176    (OH-heuristic), and the 'then' branch is unlikely because of the
1177    RH-heuristic -- giving the 'then' branch an even lower combined
1178    probability using the Dempster-Shafer theory.
1179    
1180    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1181    probability of the 'then' branch because of the loop in the else
1182    branch.
1183    
1184    
1185    Graphical Viewing:
1186    ------------------
1187    I merely plugged in Allen's graphical viewers into the compiler. The
1188    additional code is not much. At the top level, saying:
1189    
1190            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1191    
1192    will display the graphical view of the control flow graph just before
1193    back-patching.  daVinci must be in your path for this to work. If
1194    daVinci is not available, then the default viewer can be changed
1195    using:
1196    
1197            Control.MLRISC.getString "viewer"
1198    
1199    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1200    course, these viewers must be in your path.
1201    
1202    The above will display the compilation unit at the level of clusters,
1203    many of which are small, boring, and un-interesting. Also setting:
1204    
1205            Control.MLRISC.getInt "cfg-graphical-view_size"
1206    
1207    will display clusters that are larger than the value set by the above.
1208    
1209    
1210    ----------------------------------------------------------------------
1211    Name: Matthias Blume
1212    Date: 2002/03/21 22:20:00 EST
1213    Tag: blume-20020321-kmp-bugfix
1214    Description:
1215    
1216    Changed the interface to the KMP routine in PreString and fixed
1217    a minor bug in one place where it was used.
1218    
1219    ----------------------------------------------------------------------
1220    Name: Allen Leung
1221    Date: 2002/03/21 20:30:00 EST
1222    Tag: leunga-20020321-cfg
1223    Description:
1224    
1225      Fixed a potential problem in cfg edge splitting.
1226    
1227    ----------------------------------------------------------------------
1228    Name: Allen Leung
1229    Date: 2002/03/21 17:15:00 EST
1230    Tag: leunga-20020321-x86-fp-cfg
1231    Description:
1232    
1233      1. Recoded the buggy parts of x86-fp.
1234    
1235         a. All the block reordering code has been removed.
1236            We now depend on the block placement phases to do this work.
1237    
1238         b. Critical edge splitting code has been simplified and moved into the
1239            CFG modules, as where they belong.
1240    
1241         Both of these were quite buggy and complex.  The code is now much, much
1242         simpler.
1243    
1244      2. X86 backend.
1245    
1246         a. Added instructions for 64-bit support.  Instruction selection for
1247            64-bit has not been committed, however, since that
1248            requires changes to MLTREE which haven't been approved by
1249            Lal and John.
1250    
1251         b. Added support for FUCOMI and FUCOMIP when generating code for
1252            PentiumPro and above.  We only generate these instructions in
1253            the fast-fp mode.
1254    
1255         c. Added cases for JP and JNP in X86FreqProps.
1256    
1257      3. CFG
1258    
1259         CFG now has a bunch of methods for edge splitting and merging.
1260    
1261      4. Machine description.
1262    
1263         John's simplification of MLTREE_BASIS.fcond broke a few machine
1264         description things:
1265    
1266         rtl-build.{sig,sml} and hppa.mdl fixed.
1267    
1268         NOTE: the machine description stuff in the repository is still broken.
1269               Again, I can't put my fixes in because that involves
1270               changes to MLTREE.
1271    
1272    ----------------------------------------------------------------------
1273    Name: Matthias Blume
1274    Date: 2002/03/20 15:55:00 EST
1275    Tag: blume-20020320-kmp
1276    Description:
1277    
1278    Implemented Knuth-Morris-Pratt string matching in PreString and used
1279    it for String.isSubstring, Substring.isSubstring, and
1280    Substring.position.
1281    
1282    (Might need some stress-testing.  Simple examples worked fine.)
1283    
1284    ----------------------------------------------------------------------
1285    Name: Matthias Blume
1286    Date: 2002/03/19 16:37:00 EST
1287    Tag: blume-20020319-witnesses
1288    Description:
1289    
1290    Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
1291    
1292    This implements a generic mechanism for changing constness qualifiers
1293    anywhere within big C types without resorting to outright "casts".
1294    (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
1295    modify the constness at the outermost level.)
1296    The implementation of "convert" is based on the idea of "witness"
1297    values -- values that are not used by the operation but whose types
1298    "testify" to their applicability.  On the implementation side, "convert"
1299    is simply a projection (returning its second curried argument).  With
1300    cross-module inlining, it should not result in any machine code being
1301    generated.
1302    
1303    ----------------------------------------------------------------------
1304    Name: Matthias Blume
1305    Date: 2002/03/15 16:40:00 EST
1306    Tag: blume-20020315-basis
1307    Description:
1308    
1309    Provided (preliminary?) implementations for
1310    
1311      {String,Substring}.{concatWith,isSuffix,isSubstring}
1312    
1313    and
1314    
1315      Substring.full
1316    
1317    Those are in the Basis spec but they were missing in SML/NJ.
1318    
1319    ----------------------------------------------------------------------
1320    Name: Matthias Blume
1321    Date: 2002/03/14 21:30:00 EST
1322    Tag: blume-20020314-controls
1323    Description:
1324    
1325    Controls:
1326    ---------
1327    
1328    1. Factored out the recently-added Controls : CONTROLS stuff and put
1329       it into its own library $/controls-lib.cm.  The source tree for
1330       this is under src/smlnj-lib/Controls.
1331    
1332    2. Changed the names of types and functions in this interface, so they
1333       make a bit more "sense":
1334    
1335          module -> registry
1336          'a registry -> 'a group
1337    
1338    3. The interface now deals in ref cells only.  The getter/setter interface
1339       is (mostly) gone.
1340    
1341    4. Added a function that lets one register an already-existing ref cell.
1342    
1343    5. Made the corresponding modifications to the rest of the code so that
1344       everything compiles again.
1345    
1346    6. Changed the implementation of Controls.MLRISC back to something closer
1347       to the original.  In particular, this module (and therefore MLRISC)
1348       does not depend on Controls.  There now is some link-time code in
1349       int-sys.sml that registers the MLRISC controls with the Controls
1350       module.
1351    
1352    CM:
1353    ---
1354    
1355      * One can now specify the lambda-split aggressiveness in init.cmi.
1356    
1357    ----------------------------------------------------------------------
1358    Name: Allen Leung
1359    Date: 2002/03/13 17:30:00 EST
1360    Tag: leunga-20020313-x86-fp-unary
1361    Description:
1362    
1363    Bug fix for:
1364    
1365    > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
1366    > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
1367    > - fun f(x,(y,z)) = Real.~ y;
1368    > [autoloading]
1369    > [autoloading done]
1370    >       fchsl   (%eax), 184(%esp)
1371    > Error: MLRisc bug: X86MCEmitter.emitInstr
1372    >
1373    > uncaught exception Error
1374    >   raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
1375    
1376    The problem was that the code generator did not generate any fp registers
1377    in this case, and the ra didn't know that it needed to run the X86FP phase to
1378    translate the pseudo fp instruction.   This only happened with unary fp
1379    operators in certain situations.
1380    
1381    ----------------------------------------------------------------------
1382    Name: Matthias Blume
1383    Date: 2002/03/13 14:00:00 EST
1384    Tag: blume-20020313-overload-etc
1385    Description:
1386    
1387    1. Added _overload as a synonym for overload for backward compatibility.
1388       (Control.overloadKW must be true for either version to be accepted.)
1389    
1390    2. Fixed bug in install script that caused more things to be installed
1391       than what was requested in config/targets.
1392    
1393    3. Made CM aware of the (_)overload construct so that autoloading
1394       works.
1395    
1396    ----------------------------------------------------------------------
1397    Name: Matthias Blume
1398    Date: 2002/03/12 22:03:00 EST
1399    Tag: blume-20020312-url
1400    Description:
1401    
1402    Forgot to update BOOT and srcarchiveurl.
1403    
1404    ----------------------------------------------------------------------
1405    Name: Matthias Blume
1406    Date: 2002/03/12 17:30:00 EST
1407    Tag: blume-20020312-version110392
1408    Description:
1409    
1410    Yet another version number bump (because of small changes to the
1411    binfile format).  Version number is now 110.39.2.  NEW BOOTFILES!
1412    
1413    Changes:
1414    
1415      The new pid generation scheme described a few weeks ago was overly
1416      complicated.  I implemented a new mechanism that is simpler and
1417      provides a bit more "stability":  Once CM has seen a compilation
1418      unit, it keeps its identity constant (as long as you do not delete
1419      those crucial CM/GUID/* files).  This means that when you change
1420      an interface, compile, then go back to the old interface, and
1421      compile again, you arrive at the original pid.
1422    
1423      There now also is a mechanism that instructs CM to use the plain
1424      environment hash as a module's pid (effectively making its GUID
1425      the empty string).  For this, "noguid" must be specified as an
1426      option to the .sml file in question within its .cm file.
1427      This is most useful for code that is being generated by tools such
1428      as ml-nlffigen (because during development programmers tend to
1429      erase the tool's entire output directory tree including CM's cached
1430      GUIDs).  "noguid" is somewhat dangerous (since it can be used to locally
1431      revert to the old, broken behavior of SML/NJ, but in specific cases
1432      where there is no danger of interface confusion, its use is ok
1433      (I think).
1434    
1435      ml-nlffigen by default generates "noguid" annotations.  They can be
1436      turned off by specifying -guid in its command line.
1437    
1438    ----------------------------------------------------------------------
1439    Name: Lal George
1440    Date: 2002/03/12 12 14:42:36 EST
1441    Tag: george-20020312-frequency-computation
1442    Description:
1443    
1444    Integrated jump chaining and static block frequency into the
1445    compiler. More details and numbers later.
1446    
1447    ----------------------------------------------------------------------
1448    Name: Lal George
1449    Date: 2002/03/11 11 22:38:53 EST
1450    Tag: george-20020311-jump-chain-elim
1451    Description:
1452    
1453    Tested the jump chain elimination on all architectures (except the
1454    hppa).  This is on by default right now and is profitable for the
1455    alpha and x86, however, it may not be profitable for the sparc and ppc
1456    when compiling the compiler.
1457    
1458    The gc test will typically jump to a label at the end of the cluster,
1459    where there is another jump to an external cluster containing the actual
1460    code to invoke gc. This is to allow factoring of common gc invocation
1461    sequences. That is to say, we generate:
1462    
1463            f:
1464               testgc
1465               ja   L1      % jump if above to L1
1466    
1467            L1:
1468               jmp L2
1469    
1470    
1471    After jump chain elimination the 'ja L1' instructions is converted to
1472    'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
1473    up being implemented in their long form (if L2 is far away) using:
1474    
1475            jbe     L3      % jump if below or equal to L3
1476            jmp     L2
1477         L3:
1478            ...
1479    
1480    
1481    For large compilation units L2  may be far away.
1482    
1483    
1484    ----------------------------------------------------------------------
1485    Name: Matthias Blume
1486    Date: 2002/03/11 13:30:00 EST
1487    Tag: blume-20020311-mltreeeval
1488    Description:
1489    
1490    A functor parameter was missing.
1491    
1492    ----------------------------------------------------------------------
1493    Name: Allen Leung
1494    Date: 2002/03/11 10:30:00 EST
1495    Tag: leunga-20020311-runtime-string0
1496    Description:
1497    
1498       The representation of the empty string now points to a
1499    legal null terminated C string instead of unit.  It is now possible
1500    to convert an ML string into C string with InlineT.CharVector.getData.
1501    This compiles into one single machine instruction.
1502    
1503    ----------------------------------------------------------------------
1504    Name: Allen Leung
1505    Date: 2002/03/10 23:55:00 EST
1506    Tag: leunga-20020310-x86-call
1507    Description:
1508    
1509       Added machine generation for CALL instruction (relative displacement mode)
1510    
1511    ----------------------------------------------------------------------
1512    Name: Matthias Blume
1513    Date: 2002/03/08 16:05:00
1514    Tag: blume-20020308-entrypoints
1515    Description:
1516    
1517    Version number bumped to 110.39.1.  NEW BOOTFILES!
1518    
1519    Entrypoints: non-zero offset into a code object where execution should begin.
1520    
1521    - Added the notion of an entrypoint to CodeObj.
1522    - Added reading/writing of entrypoint info to Binfile.
1523    - Made runtime system bootloader aware of entrypoints.
1524    - Use the address of the label of the first function given to mlriscGen
1525      as the entrypoint.  This address is currently always 0, but it will
1526      not be 0 once we turn on block placement.
1527    - Removed the linkage cluster code (which was The Other Way(tm) of dealing
1528      with entry points) from mlriscGen.
1529    
1530    ----------------------------------------------------------------------
1531    Name: Allen Leung
1532    Date: 2002/03/07 20:45:00 EST
1533    Tag: leunga-20020307-x86-cmov
1534    Description:
1535    
1536       Bug fixes for CMOVcc on x86.
1537    
1538       1. Added machine code generation for CMOVcc
1539       2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
1540       3. CMOVcc cannot have an immediate operand as argument.
1541    
1542    ----------------------------------------------------------------------
1543    Name: Matthias Blume
1544    Date: 2002/03/07 16:15:00 EST
1545    Tag: blume-20020307-controls
1546    Description:
1547    
1548    This is a very large but mostly boring patch which makes (almost)
1549    every tuneable compiler knob (i.e., pretty much everything under
1550    Control.* plus a few other things) configurable via both the command
1551    line and environment variables in the style CM did its configuration
1552    until now.
1553    
1554    Try starting sml with '-h' (or, if you are brave, '-H')
1555    
1556    To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
1557    implements the underlying generic mechanism.
1558    
1559    The interface to some of the existing such facilities has changed somewhat.
1560    For example, the MLRiscControl module now provides mkFoo instead of getFoo.
1561    (The getFoo interface is still there for backward-compatibility, but its
1562    use is deprecated.)
1563    
1564    The ml-build script passes -Cxxx=yyy command-line arguments through so
1565    that one can now twiddle the compiler settings when using this "batch"
1566    compiler.
1567    
1568    TODO items:
1569    
1570    We should go through and throw out all controls that are no longer
1571    connected to anything.  Moreover, we should go through and provide
1572    meaningful (and correct!) documentation strings for those controls
1573    that still are connected.
1574    
1575    Currently, multiple calls to Controls.new are accepted (only the first
1576    has any effect).  Eventually we should make sure that every control
1577    is being made (via Controls.new) exactly once.  Future access can then
1578    be done using Controls.acc.
1579    
1580    Finally, it would probably be a good idea to use the getter-setter
1581    interface to controls rather than ref cells.  For the time being, both
1582    styles are provided by the Controls module, but getter-setter pairs are
1583    better if thread-safety is of any concern because they can be wrapped.
1584    
1585    *****************************************
1586    
1587    One bug fix: The function blockPlacement in three of the MLRISC
1588    backpatch files used to be hard-wired to one of two possibilities at
1589    link time (according to the value of the placementFlag).  But (I
1590    think) it should rather sense the flag every time.
1591    
1592    *****************************************
1593    
1594    Other assorted changes (by other people who did not supply a HISTORY entry):
1595    
1596    1. the cross-module inliner now works much better (Monnier)
1597    2. representation of weights, frequencies, and probabilities in MLRISC
1598       changed in preparation of using those for weighted block placement
1599       (Reppy, George)
1600    
1601    ----------------------------------------------------------------------
1602    Name: Lal George
1603    Date: 2002/03/07 14:44:24 EST 2002
1604    Tag: george-20020307-weighted-block-placement
1605    
1606    Tested the weighted block placement optimization on all architectures
1607    (except the hppa) using AMPL to generate the block and edge frequencies.
1608    Changes were required in the machine properties to correctly
1609    categorize trap instructions. There is an MLRISC flag
1610    "weighted-block-placement" that can be used to enable weighted block
1611    placement, but this will be ineffective without block/edge
1612    frequencies (coming soon).
1613    
1614    
1615    ----------------------------------------------------------------------
1616    Name: Lal George
1617    Date: 2002/03/05 17:24:48 EST
1618    Tag: george-20020305-linkage-cluster
1619    
1620    In order to support the block placement optimization, a new cluster
1621    is generated as the very first cluster (called the linkage cluster).
1622    It contains a single jump to the 'real' entry point for the compilation
1623    unit. Block placement has no effect on the linkage cluster itself, but
1624    all the other clusters  have full freedom in the manner in which they
1625    reorder blocks or functions.
1626    
1627    On the x86 the typical linkage code that is generated is:
1628       ----------------------
1629            .align 2
1630       L0:
1631            addl    $L1-L0, 72(%esp)
1632            jmp     L1
1633    
1634    
1635            .align  2
1636       L1:
1637       ----------------------
1638    
1639    72(%esp) is the memory location for the stdlink register. This
1640    must contain the address of the CPS function being called. In the
1641    above example, it contains the address of  L0; before
1642    calling L1 (the real entry point for the compilation unit), it
1643    must contain the address for L1, and hence
1644    
1645            addl $L1-L0, 72(%esp)
1646    
1647    I have tested this on all architectures except the hppa.The increase
1648    in code size is of course negligible
1649    
1650    ----------------------------------------------------------------------
1651    Name: Allen Leung
1652    Date: 2002/03/03 13:20:00 EST
1653    Tag: leunga-20020303-mlrisc-tools
1654    
1655      Added #[ ... ] expressions to mlrisc tools
1656    
1657    ----------------------------------------------------------------------
1658    Name: Matthias Blume
1659    Date: 2002/02/27 12:29:00 EST
1660    Tag: blume-20020227-cdebug
1661    Description:
1662    
1663    - made types in structure C and C_Debug to be equal
1664    - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
1665    - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
1666    
1667    ----------------------------------------------------------------------
1668    Name: Matthias Blume
1669    Date: 2002/02/26 12:00:00 EST
1670    Tag: blume-20020226-ffi
1671    Description:
1672    
1673    1. Fixed a minor bug in CM's "noweb" tool:
1674       If numbering is turned off, then truly don't number (i.e., do not
1675       supply the -L option to noweb).  The previous behavior was to supply
1676       -L'' -- which caused noweb to use the "default" line numbering scheme.
1677       Thanks to Chris Richards for pointing this out (and supplying the fix).
1678    
1679    2. Once again, I reworked some aspects of the FFI:
1680    
1681       A. The incomplete/complete type business:
1682    
1683       - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
1684         gone!
1685       - ML types representing an incomplete type are now *equal* to
1686         ML types representing their corresponding complete types (just like
1687         in C).  This is still safe because ml-nlffigen will not generate
1688         RTTI for incomplete types, nor will it generate functions that
1689         require access to such RTTI.   But when ML code generated from both
1690         incomplete and complete versions of the C type meet, the ML types
1691         are trivially interoperable.
1692    
1693         NOTE:  These changes restore the full generality of the translation
1694         (which was previously lost when I eliminated functorization)!
1695    
1696       B. Enum types:
1697    
1698       - Structure C now has a type constructor "enum" that is similar to
1699         how the "su" constructor works.  However, "enum" is not a phantom
1700         type because each "T enum" has values (and is isomorphic to
1701         MLRep.Signed.int).
1702       - There are generic access operations for enum objects (using
1703         MLRep.Signed.int).
1704       - ml-nlffigen will generate a structure E_foo for each "enum foo".
1705         * The structure contains the definition of type "mlrep" (the ML-side
1706         representation type of the enum).  Normally, mlrep is the same
1707         as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
1708         then mlrep will be defined as a datatype -- thus facilitating
1709         pattern matching on mlrep values.
1710         ("-ec" will be suppressed if there are duplicate values in an
1711          enumeration.)
1712         * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
1713         will be generated for each C enum constant xxx.
1714         * Conversion functions m2i and i2m convert between mlrep and
1715         MLRep.Signed.int.  (Without "-ec", these functions are identities.)
1716         * Coversion functions c and ml convert between mlrep and "tag enum".
1717         * Access functions (get/set) fetch and store mlrep values.
1718       - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
1719         enumerations are merged into one single enumeration represented by
1720         structure E_'.
1721    
1722    ----------------------------------------------------------------------
1723    Name: Allen Leung
1724    Date: 2002/02/25 04:45:00 EST
1725    Tag: leunga-20020225-cps-spill
1726    
1727    This is a new implementation of the CPS spill phase.
1728    The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
1729    In case of problems, replace it with the old file spill.sml
1730    
1731    The current compiler runs into some serious performance problems when
1732    constructing a large record.  This can happen when we try to compile a
1733    structure with many items.  Even a very simple structure like the following
1734    makes the compiler slow down.
1735    
1736        structure Foo = struct
1737           val x_1 = 0w1 : Word32.int
1738           val x_2 = 0w2 : Word32.int
1739           val x_3 = 0w3 : Word32.int
1740           ...
1741           val x_N = 0wN : Word32.int
1742        end
1743    
1744    The following table shows the compile time, from N=1000 to N=4000,
1745    with the old compiler:
1746    
1747    N
1748    1000   CPS 100 spill                           0.04u  0.00s  0.00g
1749           MLRISC ra                               0.06u  0.00s  0.05g
1750              (spills = 0 reloads = 0)
1751           TOTAL                                   0.63u  0.07s  0.21g
1752    
1753    1100   CPS 100 spill                           8.25u  0.32s  0.64g
1754           MLRISC ra                               5.68u  0.59s  3.93g
1755              (spills = 0 reloads = 0)
1756           TOTAL                                   14.71u  0.99s  4.81g
1757    
1758    1500   CPS 100 spill                           58.55u  2.34s  1.74g
1759           MLRISC ra                               5.54u  0.65s  3.91g
1760              (spills = 543 reloads = 1082)
1761           TOTAL                                   65.40u  3.13s  6.00g
1762    
1763    2000   CPS 100 spill                           126.69u  4.84s  3.08g
1764           MLRISC ra                               0.80u  0.10s  0.55g
1765              (spills = 42 reloads = 84)
1766           TOTAL                                   129.42u  5.10s  4.13g
1767    
1768    3000   CPS 100 spill                           675.59u  19.03s  11.64g
1769           MLRISC ra                               2.69u  0.27s  1.38g
1770              (spills = 62 reloads = 124)
1771           TOTAL                                   682.48u  19.61s  13.99g
1772    
1773    4000   CPS 100 spill                           2362.82u  56.28s  43.60g
1774           MLRISC ra                               4.96u  0.27s  2.72g
1775              (spills = 85 reloads = 170)
1776           TOTAL                                   2375.26u  57.21s  48.00g
1777    
1778    As you can see the old cps spill module suffers from some serious
1779    performance problem.  But since I cannot decipher the old code fully,
1780    instead of patching the problems up, I'm reimplementing it
1781    with a different algorithm.  The new code is more modular,
1782    smaller when compiled, and substantially faster
1783    (O(n log n) time and O(n) space).  Timing of the new spill module:
1784    
1785    4000  CPS 100 spill                           0.02u  0.00s  0.00g
1786          MLRISC ra                               0.25u  0.02s  0.15g
1787             (spills=1 reloads=3)
1788          TOTAL                                   7.74u  0.34s  1.62g
1789    
1790    Implementation details:
1791    
1792    As far as I can tell, the purpose of the CPS spill module is to make sure the
1793    number of live variables at any program point (the bandwidth)
1794    does not exceed a certain limit, which is determined by the
1795    size of the spill area.
1796    
1797    When the bandwidth is too large, we decrease the register pressure by
1798    packing live variables into spill records.  How we achieve this is
1799    completely different than what we did in the old code.
1800    
1801    First, there is something about the MLRiscGen code generator
1802    that we should be aware of:
1803    
1804    o MLRiscGen performs code motion!
1805    
1806       In particular, it will move floating point computations and
1807       address computations involving only the heap pointer to
1808       their use sites (if there is only a single use).
1809       What this means is that if we have a CPS record construction
1810       statement
1811    
1812           RECORD(k,vl,w,e)
1813    
1814       we should never count the new record address w as live if w
1815       has only one use (which is often the case).
1816    
1817       We should do something similar to floating point, but the transformation
1818       there is much more complex, so I won't deal with that.
1819    
1820    Secondly, there are now two new cps primops at our disposal:
1821    
1822     1. rawrecord of record_kind option
1823        This pure operator allocates some uninitialized storage from the heap.
1824        There are two forms:
1825    
1826         rawrecord NONE [INT n]  allocates a tagless record of length n
1827         rawrecord (SOME rk) [INT n] allocates a tagged record of length n
1828                                     and initializes the tag.
1829    
1830     2. rawupdate of cty
1831          rawupdate cty (v,i,x)
1832          Assigns to x to the ith component of record v.
1833          The storelist is not updated.
1834    
1835    We use these new primops for both spilling and increment record construction.
1836    
1837     1. Spilling.
1838    
1839        This is implemented with a linear scan algorithm (but generalized
1840        to trees).  The algorithm will create a single spill record at the
1841        beginning of the cps function and use rawupdate to spill to it,
1842        and SELECT or SELp to reload from it.  So both spills and reloads
1843        are fine-grain operations.  In contrast, in the old algorithm
1844        "spills" have to be bundled together in records.
1845    
1846        Ideally, we should sink the spill record construction to where
1847        it is needed.  We can even split the spill record into multiple ones
1848        at the places where they are needed.  But CPS is not a good
1849        representation for global code motion, so I'll keep it simple and
1850        am not attempting this.
1851    
1852     2. Incremental record construction (aka record splitting).
1853    
1854        Long records with many component values which are simulatenously live
1855        (recall that single use record addresses are not considered to
1856         be live) are constructed with rawrecord and rawupdate.
1857        We allocate space on the heap with rawrecord first, then gradually
1858        fill it in with rawupdate.  This is the technique suggested to me
1859        by Matthias.
1860    
1861        Some restrictions on when this is applicable:
1862        1. It is not a VECTOR record.  The code generator currently does not handle
1863           this case. VECTOR record uses double indirection like arrays.
1864        2. All the record component values are defined in the same "basic block"
1865           as the record constructor.  This is to prevent speculative
1866           record construction.
1867    
1868    ----------------------------------------------------------------------
1869    Name: Allen Leung
1870    Date: 2002/02/22 01:02:00 EST
1871    Tag: leunga-20020222-mlrisc-tools
1872    
1873    Minor bug fixes in the parser and rewriter
1874    
1875    ----------------------------------------------------------------------
1876    Name: Allen Leung
1877    Date: 2002/02/21 20:20:00 EST
1878    Tag: leunga-20020221-peephole
1879    
1880    Regenerated the peephole files.  Some contained typos in the specification
1881    and some didn't compile because of pretty printing bugs in the old version
1882    of 'nowhere'.
1883    
1884    ----------------------------------------------------------------------
1885    Name: Allen Leung
1886    Date: 2002/02/19 20:20:00 EST
1887    Tag: leunga-20020219-mlrisc-tools
1888    Description:
1889    
1890       Minor bug fixes to the mlrisc-tools library:
1891    
1892       1.  Fixed up parsing colon suffixed keywords
1893       2.  Added the ability to shut the error messages up
1894       3.  Reimplemented the pretty printer and fixed up/improved
1895           the pretty printing of handle and -> types.
1896       4.  Fixed up generation of literal symbols in the nowhere tool.
1897       5.  Added some SML keywords to to sml.sty
1898    
1899    ----------------------------------------------------------------------
1900    Name: Matthias Blume
1901    Date: 2002/02/19 16:20:00 EST
1902    Tag: blume-20020219-cmffi
1903    Description:
1904    
1905    A wild mix of changes, some minor, some major:
1906    
1907    * All C FFI-related libraries are now anchored under $c:
1908        $/c.cm      --> $c/c.cm
1909        $/c-int.cm  --> $c/internals/c-int.cm
1910        $/memory.cm --> $c/memory/memory.cm
1911    
1912    * "make" tool (in CM) now treats its argument pathname slightly
1913      differently:
1914        1. If the native expansion is an absolute name, then before invoking
1915           the "make" command on it, CM will apply OS.Path.mkRelative
1916           (with relativeTo = OS.FileSys.getDir()) to it.
1917        2. The argument will be passed through to subsequent phases of CM
1918           processing without "going native".  In particular, if the argument
1919           was an anchored path, then "make" will not lose track of that anchor.
1920    
1921    * Compiler backends now "know" their respective C calling conventions
1922      instead of having to be told about it by ml-nlffigen.  This relieves
1923      ml-nlffigen from one of its burdens.
1924    
1925    * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
1926    
1927    * Export C_DEBUG and C_Debug from $c/c.cm.
1928    
1929    * C type encoding in ml-nlffi-lib has been improved to model the conceptual
1930      subtyping relationship between incomplete pointers and their complete
1931      counterparts.  For this, ('t, 'c) ptr has been changed to 'o ptr --
1932      with the convention of instantiating 'o with ('t, 'c) obj whenever
1933      the pointer target type is complete.  In the incomplete case, 'o
1934      will be instantiated with some "'c iobj" -- a type obtained by
1935      using one of the functors PointerToIncompleteType or PointerToCompleteType.
1936    
1937      Operations that work on both incomplete and complete pointer types are
1938      typed as taking an 'o ptr while operations that require the target to
1939      be known are typed as taking some ('t, 'c) obj ptr.
1940    
1941      voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
1942      where void is an eqtype without any values.  This makes it possible
1943      to work on voidptr values using functions meant to operate on light
1944      incomplete pointers.
1945    
1946    * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
1947      been vastly simplified.
1948    
1949    ----------------------------------------------------------------------
1950    Name: Matthias Blume
1951    Date: 2002/02/19 10:48:00 EST
1952    Tag: blume-20020219-pqfix
1953    Description:
1954    
1955    Applied Chris Okasaki's bug fix for priority queues.
1956    
1957    ----------------------------------------------------------------------
1958    Name: Matthias Blume
1959    Date: 2002/02/15 17:05:00
1960    Tag: Release_110_39
1961    Description:
1962    
1963    Last-minute retagging is becoming a tradition... :-(
1964    
1965    This is the working release 110.39.
1966    
1967    ----------------------------------------------------------------------
1968    Name: Matthias Blume
1969    Date: 2002/02/15 16:00:00 EST
1970    Tag: Release_110_39-orig
1971    Description:
1972    
1973    Working release 110.39.  New bootfiles.
1974    
1975    (Update: There was a small bug in the installer so it wouldn't work
1976    with all shells.  So I retagged. -Matthias)
1977    
1978    ----------------------------------------------------------------------
1979    Name: Matthias Blume
1980    Date: 2002/02/15 14:17:00 EST
1981    Tag: blume-20020215-showbindings
1982    Description:
1983    
1984    Added EnvRef.listBoundSymbols and CM.State.showBindings.  Especially
1985    the latter can be useful for exploring what bindings are available at
1986    the interactive prompt.  (The first function returns only the list
1987    of symbols that are really bound, the second prints those but also the
1988    ones that CM's autoloading mechanism knows about.)
1989    
1990    ----------------------------------------------------------------------
1991    Name: Matthias Blume
1992    Date: 2002/02/15 12:08:00 EST
1993    Tag: blume-20020215-iptrs
1994    Description:
1995    
1996    Two improvements to ml-nlffigen:
1997    
1998      1. Write files only if they do not exist or if their current contents
1999         do not coincide with what's being written.  (That is, avoid messing
2000         with the time stamps unless absolutely necessary.)
2001    
2002      2. Implement a "repository" mechanism for generated files related
2003         to "incomplete pointer types".   See the README file for details.
2004    
2005    ----------------------------------------------------------------------
2006    Name: Matthias Blume
2007    Date: 2002/02/14 11:50:00 EST
2008    Tag: blume-20020214-quote
2009    Description:
2010    
2011    Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm).  This is required
2012    because of the new and improved tag generation scheme.  (Thanks to Allen
2013    Leung for pointing it out.)
2014    
2015    ----------------------------------------------------------------------
2016    Name: Lal George
2017    Date: 2002/02/14 09:55:27 EST 2002
2018    Tag: george-20020214-isabelle-bug
2019    Description:
2020    
2021    Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
2022    of Isabelle on the x86.
2023    
2024    From Allen:
2025    -----------
2026     I've found the problem:
2027    
2028         in ra-core.sml, I use the counter "blocked" to keep track of the
2029         true number of elements in the freeze queue.  When the counter goes
2030         to zero, I skip examining the queue.  But I've messed up the
2031         bookkeeping in combine():
2032    
2033             else ();
2034             case !ucol of
2035               PSEUDO => (if !cntv > 0 then
2036                     (if !cntu > 0 then blocked := !blocked - 1 else ();
2037                                        ^^^^^^^^^^^^^^^^^^^^^^^
2038                      moveu := mergeMoveList(!movev, !moveu)
2039                     )
2040                  else ();
2041    
2042         combine() is called to coalesce two nodes u and v.
2043         I think I was thinking that if the move counts of u and v are both
2044         greater than zero then after they are coalesced then one node is
2045         removed from the freeze queue.  Apparently I was thinking that
2046         both u and v are of low degree, but that's clearly not necessarily true.
2047    
2048    
2049    02/12/2002:
2050        Here's the patch.  HOL now compiles.
2051    
2052        I don't know how this impact on performance (compile
2053        time or runtime).  This bug caused the RA (especially on the x86)
2054        to go thru the potential spill phase when there are still nodes on the
2055        freeze queue.
2056    
2057    
2058    
2059    
2060    ----------------------------------------------------------------------
2061    Name: Matthias Blume
2062    Date: 2002/02/13 22:40:00 EST
2063    Tag: blume-20020213-fptr-rtti
2064    Description:
2065    
2066    Fixed a bug in ml-nlffigen that was introduced with one of the previous
2067    updates.
2068    
2069    ----------------------------------------------------------------------
2070    Name: Matthias Blume
2071    Date: 2002/02/13 16:41:00 EST
2072    Tag: blume-20020213-cmlpq
2073    Description:
2074    
2075    Added new priority queue export symbols (which have just been added to
2076    smlnj-lib.cm) to CML's version of smlnj-lib.cm.  (Otherwise CML would
2077    not compile and the installer would choke.)
2078    
2079    ----------------------------------------------------------------------
2080    Name: Matthias Blume
2081    Date: 2002/02/13 16:15:00 EST
2082    Tag: blume-20020213-various
2083    Description:
2084    
2085    1. More tweaks to ml-nlffigen:
2086    
2087       - better internal datastructures (resulting in slight speedup)
2088       - "-match" option requires exact match
2089       - "localized" gensym counters (untagged structs/unions nested within
2090         other structs/unions or within typedefs get a fresh counter; their
2091         tag will be prefixed by a concatenation of their parents' tags)
2092       - bug fixes (related to calculation of transitive closure of types
2093         to be included in the output)
2094    
2095    2. Minor Basis updates:
2096    
2097       - added implementations for List.collate and Option.app
2098    
2099    ----------------------------------------------------------------------
2100    Name: Matthias Blume
2101    Date: 2002/02/11 15:55:00 EST
2102    Tag: blume-20020211-gensym
2103    Description:
2104    
2105    Added a "-gensym" option to command line of ml-nlffigen.  This can be
2106    used to specify a "stem" -- a string that is inserted in all "gensym'd"
2107    names (ML structure names that correspond to unnamed C structs, unions,
2108    and enums), so that separate runs of ml-nlffigen do not clash.
2109    
2110    ----------------------------------------------------------------------
2111    Name: Matthias Blume
2112    Date: 2002/02/11 12:05:00 EST
2113    Tag: blume-20020211-gensml
2114    Description:
2115    
2116    A quick fix for a problem with GenSML (in the pgraph-util library):
2117    Make generation of toplevel "local" optional.  (Strictly speaking,
2118    signature definitions within "local" are not legal SML.)
2119    
2120    Other than that: updates to INSTALL and cm/TODO.
2121    
2122    ----------------------------------------------------------------------
2123    Name: Matthias Blume
2124    Date: 2002/02/08 15:00:00 EST
2125    Tag: blume-20020208-uniquepid
2126    Description:
2127    
2128    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
2129    
2130    1. The installer (config/install.sh) has gotten smarter:
2131    
2132         - Configuration options are a bit easier to specify now
2133           (in config/targets).
2134         - Bug in recognizing .tar.bz2 files fixed.
2135         - Installer automatically resolves dependencies between
2136           configuration options (e.g., if you ask for eXene, you will
2137           also get cml -- regardless whether you asked for it or not).
2138         - Installer can run in "quieter mode" by setting the environment
2139           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
2140           "completely silent", though.
2141         - Build HashCons library as part of smlnj-lib.
2142    
2143    2. A new scheme for assigning persistent identifiers to compilation
2144       units (and, by extension, to types etc.) has been put into place.
2145       This fixes a long-standing bug where types and even dynamic values
2146       can get internally confused, thereby compromising type safety
2147       (abstraction) and dynamic correctness.  See
2148    
2149         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
2150    
2151       for an example of how things could go wrong until now.
2152    
2153       The downside of the new scheme is that pids are not quite as
2154       persistent as they used to be: CM will generate a fresh pid
2155       for every compilation unit that it thinks it sees for the first
2156       time.  That means that if you compile starting from a clean, fresh
2157       source tree at two different times, you end up with different
2158       binaries.
2159    
2160       Cutoff recompilation, however, has not been compromised because
2161       CM keeps pid information in special caches between runs.
2162    
2163    ----------------------------------------------------------------------
2164    Name: Lal George
2165    Date: 2002/02/07 15:34:13 EST 2002
2166    Tag: <none>
2167    Description:
2168    
2169    Compilers that generate assembly code may produce  global labels
2170    whose value is resolved at link time. The various peephole optimization
2171    modules did not take this in account.
2172    
2173    TODO. The Labels.addrOf function should really return an option
2174    type so that clients are forced to deal with this issue, rather
2175    than an exception being raised.
2176    
2177    ----------------------------------------------------------------------
2178    Name: Lal George
2179    Date: 2002/02/06 13:55:02 EST
2180    Tag: george-20020206-ra-breakup
2181    Description:
2182    
2183    1. A bug fix from Allen.
2184    
2185        A typo causes extra fstp %st(0)'s to be generated at compensation
2186        edges, which might cause stack underflow traps at runtime.  This
2187        occurs in fft where there are extraneous fstps right before the 'into'
2188        trap instruction (in this case they are harmless since none of the
2189        integers overflow.)
2190    
2191    2. Pulled out various utility modules that were embedded in the modules
2192       of the register allocator. I need these modules for other purposes, but
2193       they are not complete enough to put into a library (just yet).
2194    ----------------------------------------------------------------------
2195    Name: Matthias Blume
2196    Date: 2002/01/31 16:05:00 EST
2197    Tag: blume-20020131-sparc-ccalls
2198    Description:
2199    
2200    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
2201       of extra stack space by mistake.  Fixed.
2202    
2203    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
2204    
2205    ----------------------------------------------------------------------
2206    Name: Allen Leung
2207    Date: 2002/01/30
2208    Tag: leunga-20020130-nowhere-bug-fix
2209    Description:
2210    
2211       MLRISC bug fixes:
2212       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
2213       2. MachineInt.fromString was negating its value.
2214    
2215    ----------------------------------------------------------------------
2216    Name: Matthias Blume
2217    Date: 2002/01/29
2218    Tag: blume-20020129-INSTALL
2219    Description:
2220    
2221    - Added somewhat detailed installation instructions (file INSTALL).
2222    - Fixed curl-detection bug in config/install.sh.
2223    - It is now possible to select the URL getter using the URLGETTER
2224      environment variable:
2225    
2226          not set / "unknown"      --> automatic detection (script tries wget,
2227                                       curl, and lynx)
2228          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
2229                                       how to properly invoke them)
2230          other                    --> use $URLGETTER directly, it must take
2231                                       precisely two command-line arguments
2232                                       (source URL and destination file name)
2233    
2234    ----------------------------------------------------------------------
2235    Name: Matthias Blume
2236    Date: 2002/01/28
2237    Tag: blume-20020128-sparc-ccalls
2238    Description:
2239    
2240    - Fixed problem with calculation of "used" registers in sparc-c-calls.
2241    - Make use of the allocParam argument in sparc-c-calls.
2242    
2243    ----------------------------------------------------------------------
2244    Name: Matthias Blume
2245    Date: 2002/01/28
2246    Tag: blume-20020128-allocParam
2247    Description:
2248    
2249    John Reppy:  Changes c-calls API to accept client-callback for
2250    allocating extra stack space.
2251    me: Corresponding changes to mlriscGen (using a dummy argument that
2252        does not change the current behavior).
2253    
2254    ----------------------------------------------------------------------
2255    Name: Matthias Blume
2256    Date: 2002/01/28 12:00:00
2257    Tag: Release_110_38
2258    Description:
2259    
2260    This time for real!!!
2261    
2262    ----------------------------------------------------------------------
2263    Name: Matthias Blume
2264    Date: 2002/01/28 10:56:00 EST
2265    Tag: blume-20020128-retraction
2266    Description:
2267    
2268    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
2269       with blume-Release_110_38-retracted.)
2270    
2271    1. Fixed a problem with incorrect rounding modes in real64.sml.
2272       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
2273    
2274    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
2275       and enums fixed.  The naming of corresponding ML identifiers should
2276       now be consistent again.
2277    
2278    ----------------------------------------------------------------------
2279    Name: Allen Leung
2280    Date: 2002/01/27
2281    Tag: leunga-20020127-nowhere
2282    Description:
2283    
2284       Added a target called nowhere in the configuration scripts.
2285       Enabling this will build the MLRISC 'nowhere' tool (for translating
2286       programs with where-clauses into legal SML code) during installation.
2287    
2288    ----------------------------------------------------------------------
2289    Name: Matthias Blume
2290    Date: 2002/01/25 21:27:00 EST
2291    Tag: blume-Release_110_38-retracted
2292    Description:
2293    
2294    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
2295    
2296    README will be added later.
2297    
2298    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
2299    (Release_110_38) removed.  Reason: Last-minute bug fixes.
2300    
2301    ----------------------------------------------------------------------
2302    Name: Matthias Blume
2303    Date: 2002/01/25
2304    Tag: blume-20020125-ffi
2305    Description:
2306    
2307    A large number of tweaks and improvements to ml-nlffi-lib and
2308    ml-nlffigen:
2309    
2310       - ML represenation types have been streamlined
2311       - getter and setter functions work with concrete values, not abstract
2312         ones where possible
2313       - ml-nlffigen command line more flexible (see README file there)
2314       - some bugs have been fixed (hopefully)
2315    
2316    ----------------------------------------------------------------------
2317    Name: Lal George
2318    Date: 2002/01/24
2319    Tag: george-20020124-risc-ra-interface
2320    Description:
2321    
2322       There is a dramatic simplification in the interface to the
2323       register allocator for RISC architectures as a result of making
2324       parallel copy instructions explicit.
2325    
2326    ----------------------------------------------------------------------
2327    Name: Matthias Blume
2328    Date: 2002/01/22
2329    Tag: blume-20020122-x86-ccalls
2330    Description:
2331    
2332    Bug fix for c-calls on x86 (having to do with how char- and
2333    short-arguments are being handled).
2334    
2335    ----------------------------------------------------------------------
2336    Name: Matthias Blume
2337    Date: 2002/01/21
2338    Tag: blume-20020121-ff
2339    Description:
2340    
2341    Another day of fiddling with the FFI...
2342    
2343    1. Bug fix/workaround:  CKIT does not complain about negative array
2344       dimensions, so ml-nlffigen has to guard itself against this possibility.
2345       (Otherwise a negative dimension would send it into an infinite loop.)
2346    
2347    2. Some of the abstract types (light objects, light pointers, most "base"
2348       types) in structure C are now eqtypes.
2349    
2350    3. Added constructors and test functions for NULL function pointers.
2351    
2352    ----------------------------------------------------------------------
2353    Name: Matthias Blume
2354    Date: 2002/01/18
2355    Tag: blume-20020118-ready-for-new-release
2356    Description:
2357    
2358    Made config/srcarchiveurl point to a new place.  (Will provide boot
2359    files shortly.)
2360    
2361    Maybe we christen this to be 110.38?
2362    
2363    ----------------------------------------------------------------------
2364    Name: Matthias Blume
2365    Date: 2002/01/18
2366    Tag: blume-20020118-more-ffifiddle
2367    Description:
2368    
2369    Today's FFI fiddling:
2370    
2371      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
2372        C.Set.* that use concrete (MLRep.*) arguments and results instead
2373        of abstract ones.
2374    
2375      - Provided word-style bit operations etc. for "int" representation
2376        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
2377        and Long.
2378    
2379    ----------------------------------------------------------------------
2380    Name: Matthias Blume
2381    Date: 2002/01/18
2382    Tag: blume-20020118-use-x86-fp
2383    Description:
2384    
2385    Now that x86-fast-fp seems to be working, I turned it back on again
2386    by default.  (Seems to work fine now, even with the FFI.)
2387    
2388    Other than that, I added some documentation about the FFI to
2389    src/ml-nlffigen/README and updated the FFI test examples in
2390    src/ml-nlffi-lib/Tests/*.
2391    
2392    ----------------------------------------------------------------------
2393    Name: Allen Leung
2394    Date: 2002/01/17
2395    Tag: leunga-20020117-x86-fast-fp-call
2396    Description:
2397    
2398       1. Fixed a problem with handling return fp values when x86's fast fp
2399          mode is turned on.
2400    
2401       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
2402          of %f32.
2403    
2404       3. Added a constructor INT32lit to the ast of MLRISC tools.
2405    
2406    ----------------------------------------------------------------------
2407    Name: Matthias Blume
2408    Date: 2002/01/16
2409    Tag: blume-20020116-ffifiddle
2410    Description:
2411    
2412    More fiddling with the FFI interface:
2413    
2414     - Make constness 'c instead of rw wherever possible.  This eliminates
2415       the need for certain explicit coercions.  (However, due to ML's
2416       value polymorphism, there will still be many cases where explicit
2417       coercions are necessary.  Phantom types are not the whole answer
2418       to modeling a subtyping relationship in ML.)
2419    
2420     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
2421    
2422     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
2423       clumsy workaround for varargs problem.)
2424    
2425    ----------------------------------------------------------------------
2426    Name: Lal George
2427    Date: 2002/01/15
2428    Tag: <none>
2429    Description:
2430    
2431    1. Since COPY instructions are no longer native to the architecture,
2432       a generic functor can be used to implement the expandCopies function.
2433    
2434    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
2435       TEXT segment.
2436    
2437    ----------------------------------------------------------------------
2438    Name: Matthias Blume
2439    Date: 2002/01/15
2440    Tag: blume-20020115-ffiupdates
2441    Description:
2442    
2443    1. Fix for bug resulting in single-precision float values being returned
2444       incorrectly from FFI calls.
2445    
2446    2. Small modifications to C FFI API:
2447    
2448        - memory-allocation routines return straight objects (no options)
2449          and raise an exception in out-of-memory situations
2450        - unsafe extensions to cast between function pointers and pointers
2451          from/to ints
2452        - added structure C_Debug as an alternative to structure C where
2453          pointer-dereferencing (|*| and |*!) always check for null-pointers
2454        - added open_lib' to DynLinkage;  open_lib' works like open_lib
2455          but also takes a (possibly empty) list of existing library handles
2456          that the current library depends on
2457    
2458    ----------------------------------------------------------------------
2459    Name: Matthias Blume
2460    Date: 2002/01/10
2461    Tag: blume-20020110-newffigen
2462    Description:
2463    
2464    1. Updates to portable graph code.
2465    
2466    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
2467       more scalable now so that even huge interfaces such as the one
2468       for GTK compile in finite time and space. :-)
2469       See src/ml-nlffigen/README for details on what's new.
2470    
2471    ----------------------------------------------------------------------
2472    Name: Lal George
2473    Date: 2001/01/09 14:31:35 EST 2002
2474    Tag: george-20011206-rm-native-copy
2475    Description:
2476    
2477            Removed the native COPY and FCOPY instructions
2478            from all the architectures and replaced it with the
2479            explicit COPY instruction from the previous commit.
2480    
2481            It is now possible to simplify many of the optimizations
2482            modules that manipulate copies. This has not been
2483            done in this change.
2484    
2485    ----------------------------------------------------------------------
2486    Name: Lal George
2487    Date: 2001/12/06 16:50:13 EST 2001
2488    Tag: george-20011206-mlrisc-instruction
2489    Description:
2490    
2491    Changed the representation of instructions from being fully abstract
2492    to being partially concrete. That is to say:
2493    
2494      from
2495            type instruction
2496    
2497      to
2498            type instr                              (* machine instruction *)
2499    
2500            datatype instruction =
2501                LIVE of {regs: C.cellset, spilled: C.cellset}
2502              | KILL of {regs: C.cellset, spilled: C.cellset}
2503              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
2504              | ANNOTATION of {i: instruction, a: Annotations.annotation}
2505              | INSTR of instr
2506    
2507    This makes the handling of certain special instructions that appear on
2508    all architectures easier and uniform.
2509    
2510    LIVE and KILL say that a list of registers are live or killed at the
2511    program point where they appear. No spill code is generated when an
2512    element of the 'regs' field is spilled, but the register is moved to
2513    the 'spilled' (which is present, more for debugging than anything else).
2514    
2515    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
2516    We used to generate:
2517    
2518            DEFFREG f1
2519            f1 := f2 + f3
2520            trapb
2521    
2522    but now generate:
2523    
2524            f1 := f2 + f3
2525            trapb
2526            LIVE {regs=[f1,f2,f3], spilled=[]}
2527    
2528    Furthermore, the DEFFREG (hack) required that all floating point instruction
2529    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
2530    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
2531    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
2532    this architecture).
2533    
2534    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
2535    all the architectures. This will result in further simplification of the
2536    register allocator that must be aware of them for coalescing purposes, and
2537    will also simplify certain aspects of the machine description that provides
2538    callbacks related to parallel copies.
2539    
2540    ANNOTATION should be obvious, and now INSTR represents the honest to God
2541    machine instruction set!
2542    
2543    The <arch>/instructions/<arch>Instr.sml files define certain utility
2544    functions for making porting easier -- essentially converting upper case
2545    to lower case. All machine instructions (of type instr) are in upper case,
2546    and the lower case form generates an MLRISC instruction. For example on
2547    the alpha we have:
2548    
2549      datatype instr =
2550         LDA of {r:cell, b:cell, d:operand}
2551       | ...
2552    
2553      val lda : {r:cell, b:cell, d:operand} -> instruction
2554        ...
2555    
2556    where lda is just (INSTR o LDA), etc.
2557    
2558    ----------------------------------------------------------------------
2559    Name: Matthias Blume
2560    Date: 2001/11/22 21:40:00 EST
2561    Tag: Release_110_37
2562    Description:
2563    
2564    Release 110.37.  This time for real.
2565    
2566    ----------------------------------------------------------------------
2567    Name: Matthias Blume
2568    Date: 2001/11/21 16:35:00 EST
2569    Tag: blume-20011121-foot-in-mouth
2570    Description:
2571    
2572    Removed the "Release_110_37" tag because of a serious bug.
2573    This will be re-tagged once the bug is fixed.
2574    
2575    ----------------------------------------------------------------------
2576    Name: Matthias Blume
2577    Date: 2001/11/21 16:14:00 EST
2578    Tag: blume-20011121-forgottenfile
2579    Description:
2580    
2581    Forgot to add a file.  (Just a .tex-file -- part of
2582    the CM manual source.)
2583    
2584    ----------------------------------------------------------------------
2585    Name: Matthias Blume
2586    Date: 2001/11/21 16:10:00 EST
2587    Tag: blume-20011121-invalid_110_37
2588    Description:
2589    
2590    Note: I removed the original tag "Release_110_37" from this commit
2591          because we found a serious bug in all non-x86 backends.
2592          - Matthias
2593    
2594    1. Modifications to the SML/NJ code generator and to the runtime system
2595       so that code object name strings are directly inserted into code
2596       objects at code generation time.  The only business the runtime system
2597       has with this is now to read the name strings on occasions.
2598       (The encoding of the name string has also changed somewhat.)
2599    
2600    2. CM now implements a simple "set calculus" for specifying export lists.
2601       In particular, it is now possible to refer to the export lists of
2602       other libraries/groups/sources and form unions as well as differences.
2603       See the latest CM manual for details.
2604    
2605    3. An separate notion of "proxy" libraries has again be eliminated from
2606       CM's model.  (Proxy libraries are now simply a special case of using
2607       the export list calculus.)
2608    
2609    4. Some of the existing libraries now take advantage of the new set
2610       calculus.
2611       (Notice that not all libraries have been converted because some
2612       of the existing .cm-files are supposed to be backward compatible
2613       with 110.0.x.)
2614    
2615    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
2616       "General.exnMessage"!  The former relies on a certain hook to be
2617       initialized, and that often does not happen in the stand-alone case.)
2618    
2619    ----------------------------------------------------------------------
2620    Name: Lal George
2621    Date: 2001/11/21  13:56:18 EST
2622    Tag: george-2001121-pseudo-ops
2623    Description:
2624    
2625      Implemented a complete redesign of MLRISC pseudo-ops. Now there
2626      ought to never be any question of incompatabilities with
2627      pseudo-op syntax expected by host assemblers.
2628    
2629      For now, only modules supporting GAS syntax are implemented
2630      but more should follow, such as MASM, and vendor assembler
2631      syntax, e.g. IBM as, Sun as, etc.
2632    
2633    ----------------------------------------------------------------------
2634    Name: Matthias Blume
2635    Date: 2001/11/14 11:52:00 EST
2636    Tag: blume-20011114-srcname
2637    Description:
2638    
2639    1. Routed the name of the current source file to mlriscgen where it
2640       should be directly emitted into the code object.  (This last part
2641       is yet to be done.)
2642    
2643    2. Some cleanup of the pgraph code to make it match the proposal that
2644       I put out the other day.  (The proposal notwithstanding, things are
2645       still in flux here.)
2646    
2647    ----------------------------------------------------------------------
2648    Name: Lal George
2649    Date: 2001/11/14 09:44:04 EST
2650    Tag:
2651    Description:
2652    
2653      Fix for a backpatching bug reported by Allen.
2654    
2655      Because the boundary between short and long span-dependent
2656      instructions is +/- 128, there are an astounding number of
2657      span-dependent instructions whose size is over estimated.
2658    
2659      Allen came up with the idea of letting the size of span
2660      dependent instructions be non-monotonic, for a maxIter
2661      number of times, after which the size must be monotonically
2662      increasing.
2663    
2664      This table shows the number of span-dependent instructions
2665      whose size was over-estimated as a function of maxIter, for the
2666      file Parse/parse/ml.grm.sml:
2667    
2668         maxIter            # of instructions:
2669            10                      687
2670            20                      438
2671            30                      198
2672            40                        0
2673    
2674      In compiling the compiler, there is no significant difference in
2675      compilation speed between maxIter=10 and maxIter=40. Actually,
2676      my measurements showed that maxIter=40 was a tad faster than
2677      maxIter=10! Also 96% of the  files in the compiler reach a fix
2678      point within 13 iterations, so fixing maxIter at 40, while high,
2679      is okay.
2680    
2681    ----------------------------------------------------------------------
2682    Name: Matthias Blume
2683    Date: 2001/10/31 15:25:00 EST
2684    Tag: blume-20011031-pgraph
2685    Description:
2686    
2687    CKIT:
2688    * Changed the "Function" constructor of type Ast.ctype to carry optional
2689      argument identifiers.
2690    * Changed the return type of TypeUtil.getFunction accordingly.
2691    * Type equality ignores the argument names.
2692    * TypeUtil.composite tries to preserve argument names but gives up quickly
2693      if there is a mismatch.
2694    
2695    installation script:
2696    * attempts to use "curl" if available (unless "wget" is available as well)
2697    
2698    CM:
2699    * has an experimental implementation of "portable graphs" which I will
2700      soon propose as an implementation-independent library format
2701    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
2702    
2703    NLFFI-LIB:
2704    * some cleanup (all cosmetic)
2705    
2706    NLFFIGEN:
2707    * temporarily disabled the mechanism that suppresses ML output for
2708      C definitions whose identifiers start with an underscore character
2709    * generate val bindings for enum constants
2710    * user can request that only one style (light or heavy) is being used;
2711      default is to use both (command-line arguments: -heavy and -light)
2712    * fixed bug in handling of function types involving incomplete pointers
2713    * generate ML entry points that take record arguments (i.e., using
2714      named arguments) for C functions that have a prototype with named
2715      arguments
2716      (see changes to CKIT)
2717    
2718    ----------------------------------------------------------------------
2719    Name: Allen Leung
2720    Date: 2001/10/27 20:34:00 EDT
2721    Tag: leunga-20011027-x86-fast-fp-call
2722    Description:
2723    
2724       Fixed the bug described in blume-20010920-slowfp.
2725    
2726       The fix involves
2727          1. generating FCOPYs in FSTP in ia32-svid
2728          2. marking a CALL with the appropriate annotation
2729    
2730    ----------------------------------------------------------------------
2731    Name: Matthias Blume
2732    Date: 2001/10/16 11:32:00 EDT
2733    Tag: blume-20011016-netbsd
2734    Description:
2735    
2736    Underscore patch from Chris Richards (fixing problem with compiling
2737    runtime system under recent NetBSD).
2738    
2739    ----------------------------------------------------------------------
2740    Name: Allen Leung
2741    Date: 2001/10/12 17:18:32 EDT 2001
2742    Tag: leung-20011012-x86-printflowgraph
2743    Description:
2744    
2745    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
2746    
2747    ----------------------------------------------------------------------
2748    Name: Lal George
2749    Date: 2001/10/11 23:51:34 EDT
2750    Tag: george-20011011-too-many-instrs
2751    Description:
2752    
2753    The representation of a program point never expected to see more
2754    than 65536 instructions in a basic block!
2755    
2756    ----------------------------------------------------------------------
2757    Name: Lal George
2758    Date: 2001/10/09 09:41:37 EDT
2759    Tag: george-20011008-mlrisc-labels
2760    Description:
2761    
2762    Changed the machine description files to support printing of
2763    local and global labels in assembly code, based on host assembler
2764    conventions.
2765    
2766    ----------------------------------------------------------------------
2767    Name: Matthias Blume
2768    Date: 2001/09/25 15:25:00 EDT
2769    Tag: blume-20010925-exninfo
2770    Description:
2771    
2772    I provided a non-hook implementation of exnName (at the toplevel) and
2773    made the "dummy" implementation of exnMessage (at the toplevel) more
2774    useful: if nothing gets "hooked in", then at least you are going to
2775    see the exception name and a message indicating why you don't see more.
2776    
2777    [For the time being, programs that need exnMessage and want to use
2778    ml-build should either use General.exnMessage (strongly recommended) or
2779    refer to structure General at some other point so that CM sees a
2780    static dependency.]
2781    
2782    [Similar remarks go for "print" and "use":  If you want to use their
2783    functionality in stand-alone programs generated by ml-build, then use
2784    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
2785    
2786    ----------------------------------------------------------------------
2787    Name: Matthias Blume
2788    Date: 2001/09/20 17:28:00 EDT
2789    Tag: blume-20010920-slowfp
2790    Description:
2791    
2792    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
2793    
2794    ----------------------------------------------------------------------
2795    Name: Matthias Blume
2796    Date: 2001/09/20 17:20:00 EDT
2797    Tag: blume-20010920-canonicalpaths
2798    Description:
2799    
2800    0. Updated the BOOT file (something that I forgot to do earlier).
2801    
2802    1. Small internal change to CM so that it avoids "/../" in filenames
2803       as much as possible (but only where it is safe).
2804    
2805    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
2806       that arguments that contain delimiters are passed through correctly.
2807       This change also means that all "special" arguments of the form
2808       @SMLxxx... must come first.
2809    
2810    3. Changed install script to put relative anchor names for tool commands
2811       into pathconfig.
2812    
2813    ----------------------------------------------------------------------
2814    Name: Matthias Blume
2815    Date: 2001/09/18 15:35:00 EDT
2816    Tag: blume-20010918-readme11036
2817    Description:
2818    
2819    Added README files.
2820    
2821    ----------------------------------------------------------------------
2822    Name: Matthias Blume
2823    Date: 2001/09/18 11:45:00 EDT
2824    Tag: Release_110_36 (retag)
2825    Description:
2826    
2827    Fixed mistake in config/preloads. Retagged as 110.36.
2828    
2829    ----------------------------------------------------------------------
2830    Name: Matthias Blume
2831    Date: 2001/09/18 09:40:00 EDT
2832    Tag: Release_110_36_orig (tag changed)
2833    Description:
2834    
2835    New version (110.36).  New bootfiles.
2836    
2837    ----------------------------------------------------------------------
2838    Name: Matthias Blume
2839    Date: 2001/09/14 16:15:00 EDT
2840    Tag: blume-20010914-x86fastfp
2841    Description:
2842    
2843    John committed some changes that Allen made, in particular a (hopefully)
2844    correctly working version of the x86-fp module.
2845    
2846    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
2847    flag to "true".  Everything seems to compile to a fixpoint ok, and
2848    "mandelbrot" speeds up by about 15%.
2849    
2850    ----------------------------------------------------------------------
2851    Name: Matthias Blume
2852    Date: 2001/09/13 11:20:00 EDT
2853    Tag: blume-20010913-minimal
2854    Description:
2855    
2856    1. Stefan Monnier's patch to fix a miscompilation problem that
2857       was brought to light by John Reppy's work on Moby.
2858    
2859    2. Implemented a minimal "structure Compiler" that contains just
2860       "version" and "architecture".  The minimal version will be
2861       available when the full version is not.  This is for backward-
2862       compatibility with code that wants to test Compiler.version.
2863    
2864    ----------------------------------------------------------------------
2865    Name: Matthias Blume
2866    Date: 2001/08/28 14:03:00 EDT
2867    Tag: blume-20010828-ml-lex
2868    Description:
2869    
2870    Fix for bug 1581, received from Neophytos Michael.
2871    
2872    ----------------------------------------------------------------------
2873    Name: Matthias Blume
2874    Date: 2001/08/27 11:20:00 EDT
2875    Tag: blume-20010827-readme11035
2876    Description:
2877    
2878    Fleshed out the README file for 110.35.
2879    
2880    ----------------------------------------------------------------------
2881    Name: Matthias Blume
2882    Date: 2001/08/24 17:10:00 EDT
2883    Tag: Release_110_35
2884    Description:
2885    
2886    New version number (110.35).  New bootfiles.
2887    
2888    ----------------------------------------------------------------------
2889    Name: Lal George
2890    Date: 2001/08/24 13:47:18 EDT 2001
2891    Tag: george-20010824-MLRISC-graphs
2892    Description:
2893    
2894     removed clusters from MLRISC completely and replaced with graphs.
2895    
2896    ----------------------------------------------------------------------
2897    Name: Matthias Blume
2898    Date: 2001/08/23 17:50:00 EDT
2899    Tag: blume-20010823-toplevel
2900    Description:
2901    
2902    - some reorganization of the code that implements various kinds of
2903      environments in the compiler (static, dynamic, symbolic, combined)
2904    - re-implemented the EnvRef module so that evalStream works properly
2905      (if the stream contains references to "use", "CM.make", etc.)
2906    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
2907    
2908    ----------------------------------------------------------------------
2909    Name: Matthias Blume
2910    Date: 2001/08/20 15:50 EDT
2911    Tag: blume20010820-slipup
2912    Description:
2913    
2914    I forgot to commit a few files.  Here they are...
2915    
2916    ----------------------------------------------------------------------
2917    Name: Matthias Blume
2918    Date: 2001/08/20 15:35:00 EDT
2919    Tag: blume-20010820-debugprof
2920    Description:
2921    
2922    !!!! NEW BOOTFILES !!!!
2923    
2924    This is another round of reorganizing the compiler sources.  This
2925    time the main goal was to factor out all the "instrumentation"
2926    passes (for profiling and backtracing) into their own library.
2927    The difficulty was to do it in such a way that it does not depend
2928    on elaborate.cm but only on elabdata.cm.
2929    
2930    Therefore there have been further changes to both elaborate.cm and
2931    elabdata.cm -- more "generic" things have been moved from the former
2932    to the latter.  As a result, I was forced to split the assignment
2933    of numbers indicating "primtyc"s into two portions: SML-generic and
2934    SML/NJ-specific.  Since it would have been awkward to maintain,
2935    I bit the bullet and actually _changed_ the mapping between these
2936    numbers and primtycs.  The bottom line of this is that you need
2937    a new set of bin- and bootfiles.
2938    
2939    I have built new bootfiles for all architectures, so doing a fresh
2940    checkout and config/install.sh should be all you need.
2941    
2942    The newly created library's name is
2943    
2944        $smlnj/viscomp/debugprof.cm
2945    
2946    and its sources live under
2947    
2948        src/compiler/DebugProf
2949    
2950    ----------------------------------------------------------------------
2951    Name: Matthias Blume
2952    Date: 2001/08/15 17:15:00 EDT
2953    Tag: blume-20010815-compreorg
2954    Description:
2955    
2956    This is a first cut at reorganizing the CM libraries that make up the
2957    core of the compiler.  The idea is to separate out pieces that could
2958    be used independently by tools, e.g., the parser, the typechecker, etc.
2959    
2960    The current status is a step in this direction, but it is not quite
2961    satisfactory yet.  Expect more changes in the future.
2962    
2963    Here is the current (new) organization...
2964    
2965        What used to be $smlnj/viscomp/core.cm is now divided into
2966        six CM libraries:
2967    
2968             $smlnj/viscomp/basics.cm
2969                           /parser.cm
2970                           /elabdata.cm
2971                           /elaborate.cm
2972                           /execute.cm
2973                           /core.cm
2974    
2975        The CM files for these libraries live under src/system/smlnj/viscomp.
2976        All these libraries are proxy libraries that contain precisely
2977        one CM library component.  Here are the locations of the components
2978        (all within the src/compiler tree):
2979    
2980             Basics/basics.cm
2981             Parse/parser.cm
2982             ElabData/elabdata.cm
2983             Elaborator/elaborate.cm
2984             Execution/execute.cm
2985             core.cm
2986    
2987         [This organization is the same that has been used already
2988         for a while for the architecture-specific parts of the visible
2989         compiler and for the old version of core.cm.]
2990    
2991         As you will notice, many source files have been moved from their
2992         respective original locations to a new home in one of the above
2993         subtrees.
2994    
2995         The division of labor between the new libraries is the following:
2996    
2997             basics.cm:
2998                - Simple, basic definitions that pertain to many (or all) of
2999                  the other libraries.
3000             parser.cm:
3001                - The SML parser, producing output of type Ast.dec.
3002                - The type family for Ast is also defined and exported here.
3003             elabdata.cm:
3004                - The datatypes that describe input and output of the elaborator.
3005                  This includes types, absyn, and static environments.
3006             elaborator.cm:
3007                - The SML/NJ type checker and elaborator.
3008                  This maps an Ast.dec (with a given static environment) to
3009                  an Absyn.dec (with a new static environment).
3010                - This libraries implements certain modules that used to be
3011                  structures as functors (to remove dependencies on FLINT).
3012             execute.cm:
3013                - Everything having to do with executing binary code objects.
3014                - Dynamic environments.
3015             core.cm:
3016                - SML/NJ-specific instantiations of the elaborator and MLRISC.
3017                - Top-level modules.
3018                - FLINT (this should eventually become its own library)
3019    
3020    Notes:
3021    
3022    I am not 100% happy with the way I separated the elaborator (and its
3023    data structures) from FLINT.  Two instances of the same problem:
3024    
3025        1. Data structures contain certain fields that carry FLINT-specific
3026           information.  I hacked around this using exn and the property list
3027           module from smlnj-lib.  But the fact that there are middle-end
3028           specific fields around at all is a bit annoying.
3029    
3030        2. The elaborator calculates certain FLINT-related information.  I tried
3031           to make this as abstract as I could using functorization, but, again,
3032           the fact that the elaborator has to perform calculations on behalf
3033           of the middle-end at all is not nice.
3034    
3035        3. Having to used exn and property lists is unfortunate because it
3036           weakens type checking.  The other alternative (parameterizing
3037           nearly *everything*) is not appealing, though.
3038    
3039    I removed the "rebinding =" warning hack because due to the new organization
3040    it was awkward to maintain it.  As a result, the compiler now issues some of
3041    these warnings when compiling init.cmi during bootstrap compilation. On
3042    the plus side, you also get a warning when you do, for example:
3043       val op = = Int32.+
3044    which was not the case up to now.
3045    
3046    I placed "assign" and "deref" into the _Core structure so that the
3047    code that deals with the "lazy" keyword can find them there.  This
3048    removes the need for having access to the primitive environment
3049    during elaboration.
3050    
3051    ----------------------------------------------------------------------
3052    Name: Matthias Blume
3053    Date: 2001/08/13
3054    Tag: blume-20010813-closures
3055    Description:
3056    
3057    This fix was sent to us by Zhong Shao.  It is supposed to improve the
3058    performance of certain loops by avoiding needless closure allocation.
3059    
3060    ----------------------------------------------------------------------
3061    Name: Lal George
3062    Date: 2001/07/31 10:03:23 EDT 2001
3063    Tag: george-20010731-x86-fmalloc
3064    Description: Fixed bug in x86 calls
3065    
3066        There was a bug where call instructions would mysteriously
3067        vanish. The call instruction had to be one that returned
3068        a floating point value.
3069    
3070    ----------------------------------------------------------------------
3071    Name: Lal George
3072    Date: 2001/07/19 16:36:29 EDT 2001
3073    Tag: george-20010719-simple-cells
3074    Description:
3075    
3076    I have dramatically simplified the interface for CELLS in MLRISC.
3077    
3078    In summary, the cells interface is broken up into three parts:
3079    
3080      1. CellsBasis : CELLS_BASIS
3081    
3082            CellsBasis is a top level structure and common for all
3083            architectures.  it contains the definitions of basic datatypes
3084            and utility  functions over these types.
3085    
3086      2. functor Cells() : CELLS
3087    
3088            Cells generates an interface for CELLS that incorporates the
3089            specific resources on the target architecture, such as the
3090            presence of special register classes, their number and size,
3091            and various useful substructures.
3092    
3093      3. <ARCH>CELLS
3094    
3095            e.g. SparcCells: SPARCCELLS
3096    
3097            <ARCH>CELLS usually contains additional bindings for special
3098            registers  on the architecture, such as:
3099    
3100                    val r0 : cell           (* register zero *)
3101                    val y : cell            (* Y register *)
3102                    val psr : cell          (* processor status register *)
3103                    ...
3104    
3105            The structure returned by applying the Cells functor is opened
3106            in this interface.
3107    
3108    The main implication of all this is that the datatypes for cells is
3109    split between CellsBasis and CELLS -- a fairly simple change for user
3110    code.
3111    
3112    In the old scheme the CELLS interface had a definitional binding of
3113    the form:
3114    
3115            signature CELLS = sig
3116    
3117               structure CellsBasis = CellsBasis
3118    
3119               ...
3120    
3121            end
3122    
3123    With all the sharing constraints that goes on in MLRISC, this old
3124    design  quickly leads to errors such as:
3125    
3126            "structure definition spec inside of sharing ... "
3127    
3128    
3129    and appears to require an unacceptable amount of sharing and where
3130    constraint hackery.
3131    
3132    I think this error message (the interaction of definitional specs and
3133    sharing) requires more explanation on our web page.
3134    
3135    ----------------------------------------------------------------------
3136    Name: Matthias Blume
3137    Date: 2001/07/19 15:00:00 EDT
3138    Tag: blume-20010719-libreorg
3139    Description:
3140    
3141    This update puts together a fairly extensive but straightforward change
3142    to the way the libraries that implement the interactive system are
3143    organized:
3144    
3145       The biggest change is the elimination of structure Compiler.  As a
3146       replacement for this structure, there is now a CM library
3147       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
3148       that exports all the substructures of the original structure Compiler
3149       directly.  So instead of saying Compiler.Foo.bar one now simply
3150       says Foo.bar.  (The CM libraries actually export a collection of
3151       structures that is richer than the collection of substructures of
3152       structure Compiler.)
3153    
3154       To make the transition smooth, there is a separate library called
3155       $smlnj/compiler/compiler.cm which puts together and exports the
3156       original structure Compiler (or at least something very close to it).
3157    
3158       There are five members of the original structure Compiler
3159       that are not exported directly but which instead became members
3160       of a new structure Backend (described by signature BACKEND).  These are:
3161       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
3162       Interact (: INTERACT), structure Machine (: MACHINE), and val
3163       architecture (: string).
3164    
3165       Structure Compiler.Version has become structure CompilerVersion.
3166    
3167       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
3168       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
3169       or x86, respectively.
3170       Each of these exports the same frontend structures that
3171       $smlnj/compiler.cm exports.  But they do not have a structure Backend
3172       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
3173       Hppa, PPC, Sparc, or X86, respectively.
3174    
3175       Library $smlnj/compiler/all.cm exports the union of the exports of
3176       $smlnj/compiler/<arch>.cm
3177    
3178       There are no structures <Arch>Compiler anymore, use
3179       $smlnj/compiler/<arch>.cm instead.
3180    
3181       Library host-compiler-0.cm is gone.  Instead, the internal library
3182       that instantiates CM is now called cm0.cm.  Selection of the host
3183       compiler (backend) is no longer done here but. (Responsibility for it
3184       now lies with $smlnj/compiler/current.cm.  This seems to be more
3185       logical.)
3186    
3187       Many individual files have been moved or renamed.  Some files have
3188       been split into multiple files, and some "dead" files have been deleted.
3189    
3190    Aside from these changes to library organization, there are also changes
3191    to the way the code itself is organized:
3192    
3193       Structure Binfile has been re-implemented in such a way that it no
3194       longer needs any knowledge of the compiler.  It exclusively deals
3195       with the details of binfile layout.  It no longer invokes the
3196       compiler (for the purpose of creating new prospective binfile
3197       content), and it no longer has any knowledge of how to interpret
3198       pickles.
3199    
3200       Structure Compile (: COMPILE) has been stripped down to the bare
3201       essentials of compilation.  It no longer deals with linking/execution.
3202       The interface has been cleaned up considerably.
3203    
3204       Utility routines for dealing with linking and execution have been
3205       moved into their own substructures.
3206    
3207       (The ultimate goal of these changes is to provide a light-weight
3208       binfile loader/linker (at least for, e.g., stable libraries) that
3209       does not require CM or the compiler to be present.)
3210    
3211    CM documentation has been updated to reflect the changes to library
3212    organization.
3213    
3214    ----------------------------------------------------------------------
3215    Name: Matthias Blume
3216    Date: 2001/07/10 17:30:00 EDT
3217    Tag: Release_110_34
3218    Description:
3219    
3220    Minor tweak to 110.34 (re-tagged):
3221    
3222      - README.html file added to CVS repository
3223      - runtime compiles properly under FreeBSD 3.X and 4.X
3224    
3225    ----------------------------------------------------------------------
3226  Name: Matthias Blume  Name: Matthias Blume
3227  Date: 2001/07/10 17:30:00 EDT  Date: 2001/07/10 17:30:00 EDT
3228  Tag: Release_110_34  Tag: Release_110_34
# Line 2578  Line 5788 
5788       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
5789       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
5790       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
5791       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
5792       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
5793       Dave's hands. :)       Dave's hands. :)
5794    

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