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

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revision 1152, Tue Mar 19 21:36:30 2002 UTC revision 1464, Thu Mar 4 17:19:17 2004 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/03/04 11:25:00 CST
18    Tag: blume-20040304-symlinks
19    Description:
20    
21    Fixed problem with installer script (unix only) where bin/ml-yacc and
22    friends pointed (via symlinks) to absolute locations instead of just
23    .run-sml.  This was reported by Vesa A Norrman.
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume (blume (at) tti - c (dot) org)
27    Date: 2004/02/13 14:50:00 CST
28    Tag: Release_110_45
29    Description:
30    
31    New working version (110.45). New bootfiles.
32    
33    ----------------------------------------------------------------------
34    Name: Matthias Blume (blume (at) tti - c (dot) org)
35    Date: 2004/01/26 15:15:15 CST
36    Tag: blume-20040126-toplevel
37    Description:
38    
39    Improved handling of exceptions at the interactive toplevel.
40    
41    ----------------------------------------------------------------------
42    Name: Matthias Blume (blume (at) tti - c (dot) org)
43    Date: 2004/01/26 11:25:00
44    Tag: blume-20040126-app
45    Description:
46    
47    Type of top-level "app" corrected.
48    Added code for setting vp_limitPtrMask to Win32-specific runtime.
49    
50    ----------------------------------------------------------------------
51    Name: Matthias Blume (blume (at) tti - c (dot) org)
52    Date: 2003/11/18 17:10 CST
53    Tag: blume-20031118-basis-fiddle
54    Description:
55    
56    - changed Timer interface to what might become the spec
57    - POSIX_FLAGS -> BIT_FLAGS according to spec
58    - some other minor discrepancies wrt. spec eliminated
59    
60    ----------------------------------------------------------------------
61    Name: Matthias Blume (blume (at) tti - c (dot) org)
62    Date: 2003/11/06 12:00:00 CST
63    Tag: Release_110_44
64    Description:
65    
66    New working version (110.44). New bootfiles.
67    
68    ----------------------------------------------------------------------
69    Name: Matthias Blume (blume (at) tti - c (dot) org)
70    Date: 2003/11/04 11:50:00 CST
71    Tag: blume-20031104-move-libraries
72    Description:
73    
74    Eliminated the "dont_move_libraries" directive in config/targets.
75    (The mechanism was broken and could not be fixed easily.  Moreover,
76    there does not seem to be any reason not to move all libraries into
77    lib during installation.  I originally implemented this directive as a
78    backward-compatibility feature when I first introduced the new CM.
79    Now that things have been stable for a long time and going back to the
80    old CM is not an option, there is no reason to keep it around.)
81    
82    ----------------------------------------------------------------------
83    Name: Matthias Blume (blume (at) tti - c (dot) org)
84    Date: 2003/11/03 16:00:00 CST
85    Tag: blume-20031103-installdir
86    Description:
87    
88    Made installer honor INSTALLDIR variable again.  (Thanks to Chris
89    Richards for pointing out the problem and providing the solution.)
90    
91    ----------------------------------------------------------------------
92    Name: Matthias Blume (blume (at) tti - c (dot) org)
93    Date: 2003/10/01 17:05:00 CDT
94    Tag: blume-20031001-lal-mlrisc
95    Description:
96    
97    MLRISC bug fix from Lal.
98    
99    ----------------------------------------------------------------------
100    Name: Matthias Blume (blume (at) tti - c (dot) org)
101    Date: 2003/09/30 16:10:00 CDT
102    Tag: blume-20030930-primio-bat
103    Description:
104    
105    1. Added openVector, nullRd, and nullWr to PRIM_IO.
106    2. Improved .bat files (for Win32 port) to make things work under Win95.
107       (thanks to Aaron S. Hawley for this one)
108    
109    ----------------------------------------------------------------------
110    Name: Matthias Blume (blume (at) tti - c (dot) org)
111    Date: 2003/09/26 16:05:00 CDT
112    Tag: blume-20030926-wrappriv
113    Description:
114    
115    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
116    
117    ----------------------------------------------------------------------
118    Name: Matthias Blume (blume (at) tti - c (dot) org)
119    Date: 2003/09/26 15:00:00 CDT
120    Tag: blume-20030926-110_43_3
121    Description:
122    
123    - additional cleanup
124    - version number bump, NEW BOOTFILES
125    
126    ----------------------------------------------------------------------
127    Name: Matthias Blume (blume (at) tti - c (dot) org)
128    Date: 2003/09/26 12:00:00 CDT
129    Tag: blume-20030926-ppautoload
130    Description:
131    
132    I modified the read-eval-print loop so that the autoloader gets
133    invoked whenever the prettyprinter tries to look up a symbol that
134    is not currently defined in the toplevel environment but which
135    appears in CM's autoload registry.  As a result, we see far fewer of
136    those ?.Foo.Bar.xxx names in the prettyprinter's output.
137    
138    In addition to this I tried to clean up some pieces of the Basis
139    implementation (e.g., Socket, Word8Array) in order to prevent other
140    instances of these ?.Foo.Bar.xxx names from being printed.
141    
142    The mechanism that picks names for types still needs some work, though.
143    (Right now it seems that if there is a type A.t which is defined to
144    be B.u, but B is unavailable at toplevel, then A.t gets printed as
145    "?.B.u" although the perhaps more sensible solution would be to use
146    "A.t" in this case.  In other words, the prettyprinter should follow
147    a chain of DEFtycs not farther than there are corresponding toplevel
148    names in the current environment.)
149    
150    ----------------------------------------------------------------------
151    Name: Matthias Blume (blume (at) tti - c (dot) org)
152    Date: 2003/09/24 16:31:00 CDT
153    Tag: blume-20030924-installer
154    Description:
155    
156    Another installer tweak:  All the ML code for the installer is now
157    compiled during CMB.make and put into a little library called
158    $smlnj/installer.cm.  The installation then simply invokes
159    
160       sml -m $smlnj/installer.cm
161    
162    and everything happens automagically.
163    
164    Win32:  ML code senses value of environment variable SMLNJ_HOME.
165    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
166            and BINDIR.
167    
168    The new scheme guarantees that the ML code responsible for the installation
169    is in sync with the APIs of the main system.  Also, the installer is
170    somewhat faster because the installer script is precompiled.
171    
172    ----------------------------------------------------------------------
173    Name: Matthias Blume (blume (at) tti - c (dot) org)
174    Date: 2003/09/24 15:35:00 CDT
175    Tag: blume-20030924-synsock
176    Description:
177    
178    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
179    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
180    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
181    implementations of non-blocking operations from CML's Socket
182    structure.
183    
184    ----------------------------------------------------------------------
185    Name: Matthias Blume (blume (at) tti - c (dot) org)
186    Date: 2003/09/24 15:10:05 CDT
187    Tag: blume-20030924-sockets
188    Description:
189    
190    1. Fixed SOCKET API and implementation to match Basis spec.
191       This required changing the internal representation of sockets to one
192       that remembers (for each socket file descriptor) whether it is currently
193       blocking or non-blocking.  This state is maintained lazily (i.e., a system
194       call is made only if the state actually needs to change).
195    
196    2. OS-specific details of sockets were moved into separate files, thus
197       making it possible to unify the bulk of the socket implementations
198       between Unix and Win32.
199    
200    3. CML's socket API changed accordingly.
201       (Note that we need to remove non-blocking functions from this API
202       since they are redundant in the case of CML!)
203    
204    4. CML's socket implementation now makes use of non-blocking functions
205       provided by Basis, thus removing all OS-dependent code from this part
206       of CML.
207    
208    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
209    
210    ----------------------------------------------------------------------
211    Name: Matthias Blume (blume (at) tti - c (dot) org)
212    Date: 2003/09/22 12:10:00 CDT
213    Tag: blume-20030922-110_43_2
214    Description:
215    
216    Made a new interim version and bootfiles for developer's bootstrapping
217    convenience.
218    
219       110.43.2 -- NEW BOOTFILES
220    
221    ----------------------------------------------------------------------
222    Name: Matthias Blume (blume (at) tti - c (dot) org)
223    Date: 2003/09/19 15:55:00 CDT
224    Tag: blume-20030919-cmdir
225    Description:
226    
227    1. new-install.sh -> install.sh
228    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
229    3. tweaked installer so that another name instead of .cm can be chosen
230       at install time (by setting the CM_DIR_ARC environment variable
231       during installation); once installation is complete, the name is
232       fixed
233    
234    ----------------------------------------------------------------------
235    Name: Matthias Blume (blume (at) tti - c (dot) org)
236    Date: 2003/09/18 16:00:00 CDT
237    Tag: blume-20030918-110_43_1
238    Description:
239    
240    Made a new interim version and bootfiles for developer's bootstrapping
241    convenience.
242    
243       110.43.1 -- NEW BOOTFILES
244    
245    ----------------------------------------------------------------------
246    Name: Matthias Blume (blume (at) tti - c (dot) org)
247    Date: 2003/09/18 15:20:00 CDT
248    Tag: blume-20030918-misc
249    Description:
250    
251    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
252       this seems to be controversial at the moment) and used those in
253       Posix.ProcEnv.times.
254    
255    2. Added Time.{from,to}Nanoseconds to Time.
256    
257    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
258       For example, fromLargeInt never needs to look at more than 3 "big
259       digits" to get its 53 bits of precision.
260    
261    ----------------------------------------------------------------------
262    Name: Matthias Blume (blume (at) tti - c (dot) org)
263    Date: 2003/09/17 16:30:00 CDT
264    Tag: blume-20030917-real32-slices
265    Description:
266    
267    Added an entry to the primitive environment
268    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
269    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
270    
271    Removed some of the "magic" constants in real64.sml and replaced them
272    with code that generates these values from their corresponding
273    integer counterparts.
274    
275    Made all(?) the slice-related changes to the Basis and made everything
276    compile again...
277    
278    ----------------------------------------------------------------------
279    Name: Matthias Blume (blume (at) tti - c (dot) org)
280    Date: 2003/09/15 17:45:00 CDT
281    Tag: blume-20030915-rbase
282    Description:
283    
284    Fixed bug in Real.fromLargeInt.
285    
286    ----------------------------------------------------------------------
287    Name: Matthias Blume (blume (at) tti - c (dot) org)
288    Date: 2003/09/13 18:11:00 CDT
289    Tag: blume-20030913-libinstall
290    Description:
291    
292    Minor bugfix in config/libinstall (set anchor with path to
293    standalone tool after installing it, otherwise libraries that
294    need ml-lex or ml-yacc won't compile the first time the installer
295    runs).
296    
297    ----------------------------------------------------------------------
298    Name: Matthias Blume (blume (at) tti - c (dot) org)
299    Date: 2003/09/12 11:45:00 CDT
300    Tag: blume-20030912-various
301    Description:
302    
303     - fixed bug in Real.toLargeInt
304     - fixed bug in Posix.ProcEnv.times
305     - changed inputLine functions to return an option
306     - minor installer improvements / bugfixes
307     - changed default @SMLalloc parameter for x86/celeron to 64k
308    
309    ----------------------------------------------------------------------
310    Name: Matthias Blume (blume (at) tti - c (dot) org)
311    Date: 2003/09/09 22:00:00 CDT
312    Tag: Release_110_43
313    Description:
314    
315        New working release 110.43.  New bootfiles.
316    
317    ----------------------------------------------------------------------
318    Name: Matthias Blume (blume (at) tti - c (dot) org)
319    Date: 2003/09/09 19:20:00 CDT
320    Tag: blume-20030909-installer
321    Description:
322    
323    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
324    Modified config/install.bat to take advantage of it.  Also modified
325    config/install.sh (and called it config/new-install.sh) to take advantage
326    of it on Unix systems.  (The SML code is (supposed to be) platform-
327    independent.)
328    
329    The installer can now install everything under Win32
330    as well as under *nix as long as it compiles.
331    
332    Other changes:
333    
334      - made CML compile again under Win32
335      - made eXene compile under Win32 (by providing a fake structure UnixSock
336        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
337      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
338        same as type int;  under Win32 it isn't
339      - fixed some slice-related problems in the win32-specific parts of CML
340      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
341        (under Win32, the volume name is case-insensitive, and the
342        OS.Path code compares volume names for equality)
343    
344    ----------------------------------------------------------------------
345    Name: Matthias Blume (blume (at) tti - c (dot) org)
346    Date: 2003/09/08 11:55:00 CDT
347    Tag: blume-20030908-fullpath
348    Description:
349    
350    Made Win32 version of OS.FileSys.fullPath return current directory
351    when given an empty string.  This is what the spec says, and incidentally,
352    CM depends on it.  (CM otherwise goes into an infinite loop in certain
353    cases when presented with the name of a non-existing .cm file.)
354    
355    ----------------------------------------------------------------------
356    Name: Matthias Blume (blume (at) tti - c (dot) org)
357    Date: 2003/09/04 16:30:00 CDT
358    Tag: blume-20030905-slices-etc
359    Description:
360    
361      1. Changed interface to vectors and arrays in Basis to match
362         (draft) Basis spec.
363      2. Added signatures and implementations of slices according to
364         Basis spec.
365      3. Edited source code throughout the system to make it compile again
366         under 1. and 2.  (In some cases code had to be added to have it
367         match the new signatures.)
368      4. MLRISC should be backward-compatible: the copies of the originals
369         of files that needed to change under 3. were retained, the .cm files
370         check the compiler version number and use old versions when
371         appropriate.
372      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
373         dirstream -> string option (in accordance with Basis spec).
374      6. When generating code that counts lines, ml-lex used function
375         CharVector.foldli, taking advantage of its old interface.
376         This has been replaced with the corresponding code from
377         CharVectorSlice.  (html-lex must be re-lexed!)
378      7. BitArray in smlnj-lib/Util has been extended/modified to match the
379         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
380      8. Removed temporary additions (fromInternal, toInternal) from the
381         (now obsolete) IntInf in smlnj-lib/Util.
382      9. Cleaned up structure Byte.
383     10. Added localOffset, scan, and fromString to Date (according to spec).
384         Cleaned/corrected implementation of Date.
385         (Still need to check for correctness; implement better canonicalizeDate.)
386     11. Added "scan" to signature IEEE_REAL.
387     12. Some improvements to IntInf [in particular: efficiency-hack for
388         mod and rem when second operand is 2 (for parity checks).]
389     13. Changed representation of type Time.time, using a single IntInf.int
390         value counting microseconds.  This considerably simplified the
391         implementation of structure Time.  We now support negative time
392         values; scan and fromString handle signs.
393     14. Functor PrimIO now takes two additional arguments (VectorSlice and
394         ArraySlice).
395    
396    ----------------------------------------------------------------------
397    Name: Matthias Blume (blume (at) tti - c (dot) org)
398    Date: 2003/08/28 17:00:00 CDT
399    Tag: blume-20030828-intinf
400    Description:
401    
402    This is a major update which comes with a version number bump
403    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
404    and an implementation of IntInf in the Basis.
405    
406    There are a fairly large number of related changes and updates throughout
407    the system:
408    
409    Basis:
410            - Implemented IntInf.
411            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
412            - Added some missing Real64 operations, most notably Real.toLargeInt.
413            - Added FixedInt as a synonym for Int32.
414    
415    compiler:
416            * Added support for a built-in intinf type.
417              - literals
418              - pattern matching
419              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
420              - overloading on literals and operations
421    
422            This required adding a primitive type intinf, some additional
423            primops, and implementations for several non-trivial intinf
424            operations in Core.  (The intinf type is completely abstract
425            to the compiler; all operations get delegated back to the Core.)
426    
427            * Intinf equality is handled by polyequal.  However, the compiler
428            does not print its usual warning in this case (since polyequal
429            is the right thing to do there).
430    
431            * Improved the organization of structure InlineT.
432    
433            * A word about conversion primops:
434            If conversions involving intinf do not cancel out during
435            CPS contract, then the compiler must insert calls to Core functions.
436            Since all core access must be resolved already during the FLINT
437            translate phase, it would be too late a the time of CPS contract
438            to add new Core calls.  For this reason, conversion primops
439            for intinf carry two arguments:  1. the numeric argument that
440            they are supposed to convert, and 2. the Core function that
441            can help with this conversion if necessary.  If CPS contract
442            eliminates a primop, then the associated Core function becomes
443            dead and goes away.  Intinf conversion primops that do not get
444            eliminated by CPS contract get rewritten into calls of their
445            core functions by a separate, new phase.
446    
447    interactive system:
448            - Control.Print.intinfDepth controls max length of intinf constants
449            being printed. (Analogous to Control.Print.stringDepth.)
450            - Cleanup in printutil and pputil: got rid of unused stuff and
451            duplicates; replaced some of the code with code that makes better
452            use of library functionality.
453    
454    CM:
455            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
456            are no longer silent.
457    
458    CKIT:
459            Fixed mismatched uses of Int32 and LargeInt.  I always decided
460            in favor of LargeInt -- which is now the same as IntInf.
461            CKIT-knowledgable people should check whether this is what's
462            intended and otherwise change things back to using Int32 or
463            FixedInt.
464    
465    Throughout the code:
466            Started using IntInf.int literals and built-in operations
467            (e.g., comparison with 0) where this seems appropriate.
468    
469    
470    ----------------------------------------------------------------------
471    Name: Dave MacQueen (dbm@cs.uchicago.edu)
472    Date: 2003/08/13 11:36:00 CDT
473    Tag: dbm-20030813-mcz-merge1
474    Description:
475    
476    Merging changes from the mcz-branch development branch into trunk.
477    These changes involve replacement of the emulated old prettyprinter
478    interface with direct use of the SML/NJ Lib PP library, and fixing
479    of a couple of bugs (895, 1186) relating to error messages.  A new
480    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
481    has been added.
482    
483    ----------------------------------------------------------------------
484    Name: Matthias Blume (blume (at) tti - c (dot) org)
485    Date: 2003/08/11 15:45:00 CDT
486    Tag: blume-20030811-windows
487    Description:
488    
489    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
490    
491        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
492    
493    This patch restores SML/NJ's ability to run under win32.  There are a
494    number of changes, including fixes for several bugs that had gone
495    unnoticed until now:
496    
497      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
498        trying to run the win32 version from within cygwin.)
499    
500      - There are a number of simple .bat scripts that substitute for their
501        corresponding Unix shell-scripts.  (See below.)
502    
503      - The internals of ml-build have been modified slightly.  The main
504        difference is that instead of calling ".link-sml" (or link-sml.bat)
505        using OS.Process.system, the ML process delegates this task back
506        to the script.  Otherwise problems arise in mixed environments such
507        as Cygwin where scripts look and work like Unix scripts, but
508        where OS.Process.system cannot run them.
509    
510      - In CM, the srcpath pickler used native pathname syntax -- which
511        is incorrect in the case of cross-compilation.  The new pickle format
512        is independent of platform-specific naming conventions.
513    
514      - Path configuration files (such as lib/pathconfig) can now choose
515        between native and standard syntax.  Placing a line of the form
516    
517            standard!
518    
519        into the file causes all subsequent paths to be interpreted using
520        CM standard pathname syntax (= Unix conventions); a line
521    
522            native!
523    
524        switches back to native style.  This was needed so that
525        path config files can be written portably, see src/system/pathconfig.
526    
527      - Runtime system:
528    
529          - win32-filesys.c:  get_file_time and set_file_time now
530            access modification time, not creation time.
531    
532          - I/O code made aware of new array representation.
533    
534          - Bug fixes in X86.prim.masm.
535    
536       - src/system/makeml made aware of win32. (For use under cygwin
537            and other Unix-environments for windows.)
538    
539       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
540         which caused BinIO.inputAll to fail consistently.
541    
542    .bat scripts:
543    
544       Windows .bat scripts assume that SMLNJ_HOME is defined.
545    
546       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
547         applications (sml, ml-yacc, ml-lex).
548       - ml-build.bat: analogous to ml-build.
549       - config\install.bat:  Analogous to config/install.sh.  This requires
550         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
551         (nmake etc. must be on the path, and vcvars32 must have been run.)
552         Moreover, sources for ml-lex and ml-yacc need to exist under src,
553         and the bootfile hierarchy must have been unpacked under
554         sml.boot.x86-win32.
555         The script is very primitive and does a poor job at error checking.
556         It only installs the base system, ml-lex, and ml-yacc.  No other
557         libraries are being installed (i.e., you get only those that
558         are part of the compiler.)
559       - link-sml.bat:  analogous to .link-sml, but not currently used
560    
561    Unrelated bug fixes:
562    
563      - ml-nlffigen now exports structures ST_* corresponding to incomplete
564        types.
565      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
566        otherwise.)
567    
568    ----------------------------------------------------------------------
569    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
570    Date: 2003/06/17
571    Tag: macqueen-20030617-bug895
572    Description:
573    
574    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
575    Tag will be used for new development branch (mcz-branch) for
576    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
577    
578    ----------------------------------------------------------------------
579    Name: Matthias Blume (blume (at) tti - c (dot) org)
580    Date: 2003/05/27 16:55:00 CDT
581    Tag: blume-20030527-polyeq
582    Description:
583    
584    Tried to eliminated most cases of polymorphic equality.
585    
586    ----------------------------------------------------------------------
587    Name: Matthias Blume (blume (at) tti - c (dot) org)
588    Date: 2003/05/21 17:45:00 CDT
589    Tag: blume-20030517-complete
590    Description:
591    
592    Two changes:
593    
594      1. Added a flag for controlling whether non-exhaustive bindings will
595         be treated as errors (default is false).
596      2. Cleaned up the *entire* source tree so that CMB.make goes through
597         without a single non-exhaustive match- or bind warning.
598    
599    ----------------------------------------------------------------------
600    Name: Matthias Blume (blume (at) tti - c (dot) org)
601    Date: 2003/05/17 10:20:00 CDT
602    Tag: blume-20030517-absyn
603    Description:
604    
605    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
606    
607       This mainly affects the quality of error messages.  However, some
608       of the code is now more straightforward than before. (Treatment of
609       the above four constructs in translate.sml is much simpler than
610       the "macro-expansion" that was going on before.  Plus, the mach-
611       compiler no longer gets invoked just to be able to compile an
612       if-expression.)
613    
614    2. The ErrorMsg.Error exception is now caught and absorbed by the
615       interactive loop.
616    
617    ----------------------------------------------------------------------
618    Name: Allen Leung
619    Date: 2003/05/16 13:05:00 CDT
620    Tag: leunga-20030516-cygwin-runtime
621    Description:
622    
623        Ported the runtime system to cygwin, which uses the unix
624    x86-unix bin files.  Missing/buggy features:
625    
626       o getnetbyname, getnetbyaddr: these functions seem to be missing in
627         the Cygwin library.
628       o Ctrl-C handling may be flaky.
629       o Windows system calls and Windows I/O are not supported.
630    
631       A new set of binfiles is located at:
632    
633         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
634    
635       This is only needed for bootstrapping the cygwin version of smlnj.
636       Other x86 versions can use the existing binfiles.
637    
638    ----------------------------------------------------------------------
639    Name: Matthias Blume
640    Date: 2003/04/08 15:42:00 CDT
641    Tag: blume-20030408-listpair
642    Description:
643    
644    1. Added a target 'mlrisc' to installer.
645    
646    2. Added missing elements to structure ListPair.
647    
648    ----------------------------------------------------------------------
649    Name: Allen Leung
650    Date: 2003/01/07 10:40:00 EST
651    Tag: leunga-20030107-int-rem
652    Description:
653    
654    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
655    The arguments to the SUBL instruction were swapped.
656    
657    ----------------------------------------------------------------------
658    Name: Matthias Blume
659    Date: 2002/12/12 16:25:00 EST
660    Tag: blume-20021212-risc-ra
661    Description:
662    
663    Fixed a serious bug in the rewrite code for FP spilling/reloading that
664    sent the RA into an infinite loop when floating point registers get
665    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
666    110.37 and 110.38.)
667    There was another set of potential problems related to the handling of
668    MLRISC annotations (but those did not yet cause real problems, apparently).
669    
670    ----------------------------------------------------------------------
671    Name: Matthias Blume
672    Date: 2002/12/06 22:40:00 EST
673    Tag: blume-20021206-cm-fileid
674    Description:
675    
676    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
677    This fixes the problem of CM getting confused by files that suddenly
678    change their identity (e.g., by getting unlinked and recreated by some
679    text editor such as vi).  There might be a better/cheaper/cleaner way
680    of doing this, but for now this will have to do.
681    
682    ----------------------------------------------------------------------
683    Name: Matthias Blume
684    Date: 2002/10/28 09:50:00 EST
685    Tag: blume-20021028-typecheck
686    Description:
687    
688    Exported structure Typecheck from $smlnj/viscomp/core.cm.
689    
690    ----------------------------------------------------------------------
691    Name: Matthias Blume
692    Date: 2002/10/17 09:10:00 EDT
693    Tag: Release_110_42
694    Description:
695    
696    In good old tradition, there has been a slight hiccup so that we have
697    to patch 110.42 after the fact.   The old release tag has been replaced
698    (see below).
699    
700    The change solves a problem with two competing approaches the
701    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
702    each other's way.
703    
704    This change only affects the runtime system code and the installer script.
705    (No new bootfiles.)
706    
707    ----------------------------------------------------------------------
708    Name: Matthias Blume
709    Date: 2002/10/16 12:00:00 EDT
710    Tag: Release_110_42_removed
711    Description:
712    
713    New working release.  New bootfiles.
714    
715    ----------------------------------------------------------------------
716    Name: Matthias Blume
717    Date: 2002/10/10 13:10:00 EDT
718    Tag: blume-20021010-ppc-divs
719    Description:
720    
721    The mltree operator DIVS must be implemented with an overflow check on
722    the PPC because the hardware indicates divide-by-zero using "overflow" as
723    well.
724    
725    ----------------------------------------------------------------------
726    Name: Matthias Blume
727    Date: 2002/07/23 11:45:00
728    Tag: blume-20020723-smlnj-home
729    Description:
730    
731    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
732    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
733    CM_PATHCONFIG is also set), the path configuration file is assumed
734    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
735    the entire tree to some other place and everything will "just work".
736    
737    (Companion commands such as ml-build and ml-makedepend also sense this
738    variable.)
739    
740    ----------------------------------------------------------------------
741    Name: Matthias Blume
742    Date: 2002/07/12 21:19:00 EDT
743    Tag: blume-20020712-liveness
744    Description:
745    
746    Exported two useful "step" functions from liveness module (MLRISC).
747    
748    ----------------------------------------------------------------------
749    Name: Matthias Blume
750    Date: 2002/07/05 16:00 EDT
751    Tag: Release_110_41
752    Description:
753    
754    New working release.  New bootfiles.
755    
756    ----------------------------------------------------------------------
757    Name: Matthias Blume
758    Date: 2002/07/05 10:25:00 EDT
759    Tag: blume-20020705-btimp
760    Description:
761    
762    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
763    other clients can set up backtracing support.
764    
765    ----------------------------------------------------------------------
766    Name: Matthias Blume
767    Date: 2002/06/25 17:23:00 EDT
768    Tag: blume-20020625-fpmax
769    Description:
770    
771    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
772    case.  (The sense of the isNaN test was reversed -- which made min and
773    max always return their first argument.)
774    
775    ----------------------------------------------------------------------
776    Name: Matthias Blume
777    Date: 2002/06/11
778    Tag: blume-20020611-unixpath
779    Description:
780    
781    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
782    
783    ----------------------------------------------------------------------
784    Name: Matthias Blume
785    Date: 2002/06/10 16:35:00 EDT
786    Tag: blume-20020610-ieeereal
787    Description:
788    
789    I back-ported my implementation of IEEEReal.fromString from the
790    idlbasis-devel branch so that we can test it.
791    
792    Another small change is that ppDec tries to give more information
793    than just "<sig>" in the case of functors.  However, this code is
794    broken in some mysterious way if the functor's body's signature
795    has not been declared by ascription but gets inferred from the
796    implementation.  This needs fixing...
797    
798    ----------------------------------------------------------------------
799    Name: Matthias Blume
800    Date: 2002/05/31
801    Tag: blume-20020531-btrace-mode
802    Description:
803    
804    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
805    the wayside when I switched over to using Controls everywhere.)
806    
807    ----------------------------------------------------------------------
808    Name: Lal George
809    Date: 2002/05/23 12:21:40 EDT
810    Tag: george-20020523-visual-labels
811    Description:
812    
813    Labels are now displayed in the graphical output to make
814    the fall-through and target blocks obvious.
815    
816    ----------------------------------------------------------------------
817    Name: Matthias Blume
818    Date: 2002/05/22 11:03:00 EDT
819    Tag: blume-20020522-shrink
820    Description:
821    
822    John tweaked yesterday's fix for 1131 to handle an out-of-memory
823    situation that comes up when allocating huge arrays.
824    
825    ----------------------------------------------------------------------
826    Name: Matthias Blume
827    Date: 2002/05/21 16:00:00 EDT
828    Tag: Release_110_40
829    Description:
830    
831    New working release (110.40).  New bootfiles.
832    
833    [Also: John Reppy fixed GC bug 1131.]
834    
835    ----------------------------------------------------------------------
836    Name: Matthias Blume
837    Date: 2002/05/21 12:35:00 EDT
838    Tag: blume-20020521-cmdoc
839    Description:
840    
841    CM documentation update.
842    
843    ----------------------------------------------------------------------
844    Name: Matthias Blume
845    Date: 2002/05/21 10:55:00 EDT
846    Tag: blume-20020521-misc
847    Description:
848    
849    - John tweaked runtime to be silent on heap export (except when
850      GC messages are on).
851    - I added a few more things (cross-compiling versions of CMB) to
852      config/preloads (as suggestions).
853    
854    ----------------------------------------------------------------------
855    Name: Matthias Blume
856    Date: 2002/05/20 22:25:00 EDT
857    Tag: blume-20020520-controls
858    Description:
859    
860    - Added ControlUtil structure to control-lib.cm.
861    - Use it throughout.
862    - Used Controls facility to define MLRISC controls (as opposed to
863      registering MLRISC control ref cells with Controls after the fact)
864    - Fixed messed-up controls priorities.
865    
866    * Removed again all the stuff from config/preloads that one wouldn't
867      be able to preload at the time the initial heap image is built.
868      (Many libraries, e.g., CML, do not exist yet at this time.  The
869       only libraries that can be preloaded via config/preloads are those
870       that come bundled with the bootfiles.)
871    
872    ----------------------------------------------------------------------
873    Name: Matthias Blume
874    Date: 2002/05/20 10:59:00 EDT
875    Tag: blume-20020520-preloads
876    Description:
877    
878    Added a lot of commented-out suggestions for things to be included
879    in config/preloads.
880    
881    ----------------------------------------------------------------------
882    Name: Allen Leung
883    Date: 2002/05/18 14:20:00 EDT
884    Tag: leunga-20020518-mdl
885    Description:
886    
887    o Made the mdl tool stuff compile and run again.
888    o I've disabled all the stuff that depends on RTL specifications; they
889      are all badly broken anyway.
890    
891    ----------------------------------------------------------------------
892    Name: Matthias Blume
893    Date: 2002/05/17 16:49:00 EDT
894    Tag: blume-20020517-controls
895    Description:
896    
897    0. John Reppy made several modifications to the SML/NJ library.
898       In particular, there is a shiny new controls-lib.cm.
899    
900    1. Pushed new controls interface through compiler so that everything
901       compiles again.
902    
903    2. Added FormatComb and FORMAT_COMB to the CML version of the
904       SML/NJ library (so that CML compiles again).
905    
906    3. Modified init scripts because XXX_DEFAULT environment variables
907       are no longer with us.  (Boot-time initialization is now done
908       using the same environment variables that are also used for
909       startup-time initialization of controls.)
910    
911    ----------------------------------------------------------------------
912    Name: Lal George
913    Date: 2002/05/15 09:20:10 EDT
914    Tag: george-20020515-pseudo-op-decls
915    Description:
916    
917            All pseudo-ops emitted before the first segment declaration
918    such as TEXT, DATA, and BSS directives are assumed to be global
919    declarations and are emitted first in the assembly file. This is
920    useful in a number of situations where one has pseudo-ops that are not
921    specific to any segment, and also works around the constraint that one
922    cannot have client pseudo-ops in the TEXT segment.
923    
924            Because no segment is associated with these declarations it is
925    an error to allocate any space or objects before the first segment
926    directive and an exception will be raised. However, we cannot make
927    this check for client pseudo-ops.
928    
929            These top level declarations are a field in the CFG graph_info.
930    In theory you can continue to add to this field after the CFG has been
931    built -- provided you know what you are doing;-)
932    
933    ----------------------------------------------------------------------
934    Name: Matthias Blume
935    Date: 2002/05/13 16:40:00 EDT
936    Tag: blume-20020513-pp-etc
937    Description:
938    
939    A few minor bugfixes:
940    
941      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
942        (Bogus printouts for redefined bindings still occur.  Compiler
943        bug should no longer occur now.  We need to redo the prettyprinter
944        from scratch.)
945    
946      - CM pathname printer now also adds escape sequences for ( and )
947    
948      - commend and docu fixes for ml-nlffi
949    
950    ----------------------------------------------------------------------
951    Name: Matthias Blume
952    Date: 2002/05/10 16:40:00 EDT
953    Tag: blume-20020510-erg-textio
954    Description:
955    
956    Applied the following bugfix provided by Emden Gansner:
957    
958        Output is corrupted when outputSubstr is used rather than output.
959    
960        The problem occurs when a substring
961    
962            ss = (s, dataStart, dataLen)
963    
964        where dataStart > 0, fills a stream buffer with avail bytes left.
965        avail bytes of s, starting at index dataStart, are copied into the
966        buffer, the buffer is flushed, and then the remaining dataLen-avail
967        bytes of ss are copied into the beginning of the buffer. Instead of
968        starting this copy at index dataStart+avail in s, the current code
969        starts the copy at index avail.
970    
971        Fix:
972        In text-io-fn.sml, change line 695 from
973             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
974        to
975             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
976    
977    ----------------------------------------------------------------------
978    Name: Matthias Blume
979    Date: 2002/04/12 13:55:00 EDT
980    Tag: blume-20020412-assyntax
981    Description:
982    
983    1. Grabbed newer assyntax.h from the XFree86 project.
984    2. Fiddled with how to compile X86.prim.asm without warnings.
985    3. (Very) Minor cleanup in CM.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2002/04/01 (no joke!) 17:07:00 EST
990    Tag: blume-20020401-x86div
991    Description:
992    
993    Added full support for div/mod/rem/quot on the x86, using the machine
994    instruction's two results (without clumsily recomputing the remainder)
995    directly where appropriate.
996    
997    Some more extensive power-of-two support was added to the x86 instruction
998    selector (avoiding expensive divs, mods, and muls where they can be
999    replaced with cheaper shifts and masks).  However, this sort of thing
1000    ought to be done earlier, e.g., within the CPS optimizer so that
1001    all architectures benefit from it.
1002    
1003    The compiler compiles to a fixed point, but changes might be somewhat
1004    fragile nevertheless.  Please, report any strange things that you might
1005    see wrt. div/mod/quot/rem...
1006    
1007    ----------------------------------------------------------------------
1008    Name: Matthias Blume
1009    Date: 2002/03/29 17:22:00
1010    Tag: blume-20020329-div
1011    Description:
1012    
1013    Fixed my broken div/mod logic.  Unfortunately, this means that the
1014    inline code for div/mod now has one more comparison than before.
1015    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1016    The problem was with quotient = 0, because that alone does not tell
1017    us which way the rounding went.  One then has to look at whether
1018    remainder and divisor have the same sign...  :(
1019    
1020    Anyway, I replaced the bootfiles with fresh ones...
1021    
1022    ----------------------------------------------------------------------
1023    Name: Matthias Blume
1024    Date: 2002/03/29 14:10:00 EST
1025    Tag: blume-20020329-inlprims
1026    Description:
1027    
1028    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
1029    
1030    Primops have changed. This means that the bin/boot-file formats have
1031    changed as well.
1032    
1033    To make sure that there is no confusion, I made a new version.
1034    
1035    
1036    CHANGES:
1037    
1038    * removed REMT from mltree (remainder should never overflow).
1039    
1040    * added primops to deal with divisions of all flavors to the frontend
1041    
1042    * handled these primops all the way through so they map to their respective
1043      MLRISC support
1044    
1045    * used these primops in the implementation of Int, Int32, Word, Word32
1046    
1047    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1048    
1049    * parameterized INLMIN, INLMAX, and INLABS by a numkind
1050    
1051    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1052      floating point
1053    
1054    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1055      and Real (but Real.abs maps to a separate floating-point-only primop)
1056    
1057    
1058    TODO items:
1059    
1060    * Hacked Alpha32 instruction selection, disabling the selection of REMx
1061      instructions because the machine instruction encoder cannot handle
1062      them.  (Hppa, PPC, and Sparc instruction selection did not handle
1063      REM in the first place, and REM is supported by the x86 machine coder.)
1064    
1065    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1066      selection phase.  (The two can be streamlined because the hardware
1067      delivers both quotient and remainder at the same time anyway.)
1068    
1069    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1070      (Currently the behavior is inconsistent both across architectures and
1071      wrt. the draft Basis spec.)
1072    
1073    * Word8 should eventually be handled natively, too.
1074    
1075    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
1076      as if there currently is no execution path that could trigger it in
1077      SML/NJ.  (The assumptions underlying functions arith and promotable do not
1078      hold for things like multiplication and division.)
1079    
1080    ----------------------------------------------------------------------
1081    Name: Matthias Blume
1082    Date: 2002/03/27 16:27:00 EST
1083    Tag: blume-20020327-mlrisc-divisions
1084    Description:
1085    
1086    Added support for all four division operations (ML's div, mod, quot,
1087    and rem) to MLRISC.  In the course of doing so, I also rationalized
1088    the naming (no more annoying switch-around of DIV and QUOT), by
1089    parameterizing the operation by div_rounding_mode (which can be either
1090    DIV_TO_ZERO or DIV_TO_NEGINF).
1091    
1092    The generic MLTreeGen functor takes care of compiling all four
1093    operations down to only round-to-zero div.
1094    
1095    Missing pieces:
1096    
1097      * Doing something smarter than relying on MLTreeGen on architectures
1098        like, e.g., the x86 where hardware division delivers both quotient and
1099        remainder at the same time.  With this, the implementation of the
1100        round-to-neginf operations could be further streamlined.
1101    
1102      * Remove inlining support for div/mod/rem from the frontend and replace it
1103        with primops that get carried through to the backend.  Do this for all
1104        int and word types.
1105    
1106    ----------------------------------------------------------------------
1107    Name: Matthias Blume
1108    Date: 2002/03/25 17:25:00 EST
1109    Tag: blume-20020325-divmod
1110    Description:
1111    
1112    I improved (hopefully without breaking them) the implementation of Int.div,
1113    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1114    advantage of the following observations:
1115    
1116      Let  q = x quot y      r = x rem y
1117           d = x div  y      m = x mod y
1118    
1119    where "quot" is the round-to-zero version of integer division that
1120    hardware usually provides.  Then we have:
1121    
1122         r = x - q * y        where neither the * nor the - will overflow
1123         d = if q >= 0 orelse x = q * y then q else q - 1
1124                              where neither the * nor the - will overflow
1125         m = if q >= 0 orelse r = 0 then r else r + y
1126                              where the + will not overflow
1127    
1128    This results in substantial simplification of the generated code.
1129    The following table shows the number of CFG nodes and edges generated
1130    for
1131            fun f (x, y) = x OPER y
1132            (* with OPER \in div, mod, quot, rem *)
1133    
1134    
1135        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1136        --------------------------------------------------------
1137         div |         24 |         39 |         12 |         16
1138         mod |         41 |         71 |         12 |         16
1139        quot |          8 |         10 |          8 |         10
1140         rem |         10 |         14 |          8 |         10
1141    
1142    
1143    ----------------------------------------------------------------------
1144    Name: Matthias Blume
1145    Date: 2002/03/25 22:06:00 EST
1146    Tag: blume-20020325-cprotobug
1147    Description:
1148    
1149    Fixed a bug in cproto (c prototype decoder).
1150    
1151    ----------------------------------------------------------------------
1152    Name: Matthias Blume
1153    Date: 2002/03/25 16:00:00 EST
1154    Tag: blume-20020325-raw-primops
1155    Description:
1156    
1157    I did some cleanup to Allen's new primop code and
1158    replaced yesterday's bootfiles with new ones.
1159    (But they are stored in the same place.)
1160    
1161    ----------------------------------------------------------------------
1162    Name: Matthias Blume
1163    Date: 2002/03/24 22:40:00 EST
1164    Tag: blume-20020324-bootfiles
1165    Description:
1166    
1167    Made the bootfiles that Allen asked for.
1168    
1169    ----------------------------------------------------------------------
1170    Name: Allen Leung
1171    Date: 2002/03/23 15:50:00 EST
1172    Tag: leunga-20020323-flint-cps-rcc-primops
1173    Description:
1174    
1175      1. Changes to FLINT primops:
1176    
1177        (* make a call to a C-function;
1178         * The primop carries C function prototype information and specifies
1179         * which of its (ML-) arguments are floating point. C prototype
1180         * information is for use by the backend, ML information is for
1181         * use by the CPS converter. *)
1182      | RAW_CCALL of { c_proto: CTypes.c_proto,
1183                       ml_args: ccall_type list,
1184                       ml_res_opt: ccall_type option,
1185                       reentrant : bool
1186                     } option
1187       (* Allocate uninitialized storage on the heap.
1188        * The record is meant to hold short-lived C objects, i.e., they
1189        * are not ML pointers.  With the tag, the representation is
1190        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1191        *)
1192      | RAW_RECORD of {tag:bool,sz:int}
1193      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1194    
1195      2.  These CPS primops are now overloaded:
1196    
1197           rawload of {kind:numkind}
1198           rawstore of {kind:numkind}
1199    
1200          The one argument form is:
1201    
1202             rawload {kind} address
1203    
1204          The two argument form is:
1205    
1206             rawload {kind} [ml object, byte-offset]
1207    
1208      3. RAW_CCALL/RCC now takes two extra arguments:
1209    
1210         a. The first is whether the C call is reentrant, i.e., whether
1211            ML state should be saved and restored.
1212         b. The second argument is a string argument specifying the name of
1213            library and the C function.
1214    
1215         These things are currently not handled in the code generator, yet.
1216    
1217      4. In CProto,
1218    
1219         An encoding type of "bool" means "ml object" and is mapped into
1220         C prototype of PTR.  Note that "bool" is different than "string",
1221         even though "string" is also mapped into PTR, because "bool"
1222         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1223    
1224      5. Pickler/unpicker
1225    
1226         Changed to handle RAW_RECORD and newest RAW_CCALL
1227    
1228      6. MLRiscGen,
1229    
1230         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1231         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1232            in the file CodeGen/cpscompile/cps-c-calls.sml
1233    
1234      7. Added the conditional move operator
1235    
1236             condmove of branch
1237    
1238         to cps.  Generation of this is still buggy so it is currently
1239         disabled.
1240    
1241    ----------------------------------------------------------------------
1242    Name: Lal George
1243    Date: 2002/03/22 14:18:25 EST
1244    Tag: george-20020322-cps-branch-prob
1245    Description:
1246    
1247    Implemented the Ball-Larus branch prediction-heuristics, and
1248    incorporated graphical viewers for control flow graphs.
1249    
1250    Ball-Larus Heuristics:
1251    ---------------------
1252    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1253    
1254    By design it uses the Dempster-Shafer theory for combining
1255    probabilities.  For example, in the function:
1256    
1257        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1258    
1259    the ball-larus heuristics predicts that the n=0 is unlikely
1260    (OH-heuristic), and the 'then' branch is unlikely because of the
1261    RH-heuristic -- giving the 'then' branch an even lower combined
1262    probability using the Dempster-Shafer theory.
1263    
1264    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1265    probability of the 'then' branch because of the loop in the else
1266    branch.
1267    
1268    
1269    Graphical Viewing:
1270    ------------------
1271    I merely plugged in Allen's graphical viewers into the compiler. The
1272    additional code is not much. At the top level, saying:
1273    
1274            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1275    
1276    will display the graphical view of the control flow graph just before
1277    back-patching.  daVinci must be in your path for this to work. If
1278    daVinci is not available, then the default viewer can be changed
1279    using:
1280    
1281            Control.MLRISC.getString "viewer"
1282    
1283    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1284    course, these viewers must be in your path.
1285    
1286    The above will display the compilation unit at the level of clusters,
1287    many of which are small, boring, and un-interesting. Also setting:
1288    
1289            Control.MLRISC.getInt "cfg-graphical-view_size"
1290    
1291    will display clusters that are larger than the value set by the above.
1292    
1293    
1294    ----------------------------------------------------------------------
1295    Name: Matthias Blume
1296    Date: 2002/03/21 22:20:00 EST
1297    Tag: blume-20020321-kmp-bugfix
1298    Description:
1299    
1300    Changed the interface to the KMP routine in PreString and fixed
1301    a minor bug in one place where it was used.
1302    
1303    ----------------------------------------------------------------------
1304    Name: Allen Leung
1305    Date: 2002/03/21 20:30:00 EST
1306    Tag: leunga-20020321-cfg
1307    Description:
1308    
1309      Fixed a potential problem in cfg edge splitting.
1310    
1311    ----------------------------------------------------------------------
1312    Name: Allen Leung
1313    Date: 2002/03/21 17:15:00 EST
1314    Tag: leunga-20020321-x86-fp-cfg
1315    Description:
1316    
1317      1. Recoded the buggy parts of x86-fp.
1318    
1319         a. All the block reordering code has been removed.
1320            We now depend on the block placement phases to do this work.
1321    
1322         b. Critical edge splitting code has been simplified and moved into the
1323            CFG modules, as where they belong.
1324    
1325         Both of these were quite buggy and complex.  The code is now much, much
1326         simpler.
1327    
1328      2. X86 backend.
1329    
1330         a. Added instructions for 64-bit support.  Instruction selection for
1331            64-bit has not been committed, however, since that
1332            requires changes to MLTREE which haven't been approved by
1333            Lal and John.
1334    
1335         b. Added support for FUCOMI and FUCOMIP when generating code for
1336            PentiumPro and above.  We only generate these instructions in
1337            the fast-fp mode.
1338    
1339         c. Added cases for JP and JNP in X86FreqProps.
1340    
1341      3. CFG
1342    
1343         CFG now has a bunch of methods for edge splitting and merging.
1344    
1345      4. Machine description.
1346    
1347         John's simplification of MLTREE_BASIS.fcond broke a few machine
1348         description things:
1349    
1350         rtl-build.{sig,sml} and hppa.mdl fixed.
1351    
1352         NOTE: the machine description stuff in the repository is still broken.
1353               Again, I can't put my fixes in because that involves
1354               changes to MLTREE.
1355    
1356    ----------------------------------------------------------------------
1357    Name: Matthias Blume
1358    Date: 2002/03/20 15:55:00 EST
1359    Tag: blume-20020320-kmp
1360    Description:
1361    
1362    Implemented Knuth-Morris-Pratt string matching in PreString and used
1363    it for String.isSubstring, Substring.isSubstring, and
1364    Substring.position.
1365    
1366    (Might need some stress-testing.  Simple examples worked fine.)
1367    
1368    ----------------------------------------------------------------------
1369  Name: Matthias Blume  Name: Matthias Blume
1370  Date: 2002/03/19 16:37:00 EST  Date: 2002/03/19 16:37:00 EST
1371  Tag: blume-20020319-witnesses  Tag: blume-20020319-witnesses

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