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revision 1152, Tue Mar 19 21:36:30 2002 UTC revision 1394, Fri Sep 26 19:56:20 2003 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2003/09/26 15:00:00 CDT
18    Tag: blume-20030926-110_43_3
19    Description:
20    
21    - additional cleanup
22    - version number bump, NEW BOOTFILES
23    
24    ----------------------------------------------------------------------
25    Name: Matthias Blume (blume (at) tti - c (dot) org)
26    Date: 2003/09/26 12:00:00 CDT
27    Tag: blume-20030926-ppautoload
28    Description:
29    
30    I modified the read-eval-print loop so that the autoloader gets
31    invoked whenever the prettyprinter tries to look up a symbol that
32    is not currently defined in the toplevel environment but which
33    appears in CM's autoload registry.  As a result, we see far fewer of
34    those ?.Foo.Bar.xxx names in the prettyprinter's output.
35    
36    In addition to this I tried to clean up some pieces of the Basis
37    implementation (e.g., Socket, Word8Array) in order to prevent other
38    instances of these ?.Foo.Bar.xxx names from being printed.
39    
40    The mechanism that picks names for types still needs some work, though.
41    (Right now it seems that if there is a type A.t which is defined to
42    be B.u, but B is unavailable at toplevel, then A.t gets printed as
43    "?.B.u" although the perhaps more sensible solution would be to use
44    "A.t" in this case.  In other words, the prettyprinter should follow
45    a chain of DEFtycs not farther than there are corresponding toplevel
46    names in the current environment.)
47    
48    ----------------------------------------------------------------------
49    Name: Matthias Blume (blume (at) tti - c (dot) org)
50    Date: 2003/09/24 16:31:00 CDT
51    Tag: blume-20030924-installer
52    Description:
53    
54    Another installer tweak:  All the ML code for the installer is now
55    compiled during CMB.make and put into a little library called
56    $smlnj/installer.cm.  The installation then simply invokes
57    
58       sml -m $smlnj/installer.cm
59    
60    and everything happens automagically.
61    
62    Win32:  ML code senses value of environment variable SMLNJ_HOME.
63    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
64            and BINDIR.
65    
66    The new scheme guarantees that the ML code responsible for the installation
67    is in sync with the APIs of the main system.  Also, the installer is
68    somewhat faster because the installer script is precompiled.
69    
70    ----------------------------------------------------------------------
71    Name: Matthias Blume (blume (at) tti - c (dot) org)
72    Date: 2003/09/24 15:35:00 CDT
73    Tag: blume-20030924-synsock
74    Description:
75    
76    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
77    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
78    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
79    implementations of non-blocking operations from CML's Socket
80    structure.
81    
82    ----------------------------------------------------------------------
83    Name: Matthias Blume (blume (at) tti - c (dot) org)
84    Date: 2003/09/24 15:10:05 CDT
85    Tag: blume-20030924-sockets
86    Description:
87    
88    1. Fixed SOCKET API and implementation to match Basis spec.
89       This required changing the internal representation of sockets to one
90       that remembers (for each socket file descriptor) whether it is currently
91       blocking or non-blocking.  This state is maintained lazily (i.e., a system
92       call is made only if the state actually needs to change).
93    
94    2. OS-specific details of sockets were moved into separate files, thus
95       making it possible to unify the bulk of the socket implementations
96       between Unix and Win32.
97    
98    3. CML's socket API changed accordingly.
99       (Note that we need to remove non-blocking functions from this API
100       since they are redundant in the case of CML!)
101    
102    4. CML's socket implementation now makes use of non-blocking functions
103       provided by Basis, thus removing all OS-dependent code from this part
104       of CML.
105    
106    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
107    
108    ----------------------------------------------------------------------
109    Name: Matthias Blume (blume (at) tti - c (dot) org)
110    Date: 2003/09/22 12:10:00 CDT
111    Tag: blume-20030922-110_43_2
112    Description:
113    
114    Made a new interim version and bootfiles for developer's bootstrapping
115    convenience.
116    
117       110.43.2 -- NEW BOOTFILES
118    
119    ----------------------------------------------------------------------
120    Name: Matthias Blume (blume (at) tti - c (dot) org)
121    Date: 2003/09/19 15:55:00 CDT
122    Tag: blume-20030919-cmdir
123    Description:
124    
125    1. new-install.sh -> install.sh
126    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
127    3. tweaked installer so that another name instead of .cm can be chosen
128       at install time (by setting the CM_DIR_ARC environment variable
129       during installation); once installation is complete, the name is
130       fixed
131    
132    ----------------------------------------------------------------------
133    Name: Matthias Blume (blume (at) tti - c (dot) org)
134    Date: 2003/09/18 16:00:00 CDT
135    Tag: blume-20030918-110_43_1
136    Description:
137    
138    Made a new interim version and bootfiles for developer's bootstrapping
139    convenience.
140    
141       110.43.1 -- NEW BOOTFILES
142    
143    ----------------------------------------------------------------------
144    Name: Matthias Blume (blume (at) tti - c (dot) org)
145    Date: 2003/09/18 15:20:00 CDT
146    Tag: blume-20030918-misc
147    Description:
148    
149    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
150       this seems to be controversial at the moment) and used those in
151       Posix.ProcEnv.times.
152    
153    2. Added Time.{from,to}Nanoseconds to Time.
154    
155    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
156       For example, fromLargeInt never needs to look at more than 3 "big
157       digits" to get its 53 bits of precision.
158    
159    ----------------------------------------------------------------------
160    Name: Matthias Blume (blume (at) tti - c (dot) org)
161    Date: 2003/09/17 16:30:00 CDT
162    Tag: blume-20030917-real32-slices
163    Description:
164    
165    Added an entry to the primitive environment
166    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
167    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
168    
169    Removed some of the "magic" constants in real64.sml and replaced them
170    with code that generates these values from their corresponding
171    integer counterparts.
172    
173    Made all(?) the slice-related changes to the Basis and made everything
174    compile again...
175    
176    ----------------------------------------------------------------------
177    Name: Matthias Blume (blume (at) tti - c (dot) org)
178    Date: 2003/09/15 17:45:00 CDT
179    Tag: blume-20030915-rbase
180    Description:
181    
182    Fixed bug in Real.fromLargeInt.
183    
184    ----------------------------------------------------------------------
185    Name: Matthias Blume (blume (at) tti - c (dot) org)
186    Date: 2003/09/13 18:11:00 CDT
187    Tag: blume-20030913-libinstall
188    Description:
189    
190    Minor bugfix in config/libinstall (set anchor with path to
191    standalone tool after installing it, otherwise libraries that
192    need ml-lex or ml-yacc won't compile the first time the installer
193    runs).
194    
195    ----------------------------------------------------------------------
196    Name: Matthias Blume (blume (at) tti - c (dot) org)
197    Date: 2003/09/12 11:45:00 CDT
198    Tag: blume-20030912-various
199    Description:
200    
201     - fixed bug in Real.toLargeInt
202     - fixed bug in Posix.ProcEnv.times
203     - changed inputLine functions to return an option
204     - minor installer improvements / bugfixes
205     - changed default @SMLalloc parameter for x86/celeron to 64k
206    
207    ----------------------------------------------------------------------
208    Name: Matthias Blume (blume (at) tti - c (dot) org)
209    Date: 2003/09/09 22:00:00 CDT
210    Tag: Release_110_43
211    Description:
212    
213        New working release 110.43.  New bootfiles.
214    
215    ----------------------------------------------------------------------
216    Name: Matthias Blume (blume (at) tti - c (dot) org)
217    Date: 2003/09/09 19:20:00 CDT
218    Tag: blume-20030909-installer
219    Description:
220    
221    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
222    Modified config/install.bat to take advantage of it.  Also modified
223    config/install.sh (and called it config/new-install.sh) to take advantage
224    of it on Unix systems.  (The SML code is (supposed to be) platform-
225    independent.)
226    
227    The installer can now install everything under Win32
228    as well as under *nix as long as it compiles.
229    
230    Other changes:
231    
232      - made CML compile again under Win32
233      - made eXene compile under Win32 (by providing a fake structure UnixSock
234        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
235      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
236        same as type int;  under Win32 it isn't
237      - fixed some slice-related problems in the win32-specific parts of CML
238      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
239        (under Win32, the volume name is case-insensitive, and the
240        OS.Path code compares volume names for equality)
241    
242    ----------------------------------------------------------------------
243    Name: Matthias Blume (blume (at) tti - c (dot) org)
244    Date: 2003/09/08 11:55:00 CDT
245    Tag: blume-20030908-fullpath
246    Description:
247    
248    Made Win32 version of OS.FileSys.fullPath return current directory
249    when given an empty string.  This is what the spec says, and incidentally,
250    CM depends on it.  (CM otherwise goes into an infinite loop in certain
251    cases when presented with the name of a non-existing .cm file.)
252    
253    ----------------------------------------------------------------------
254    Name: Matthias Blume (blume (at) tti - c (dot) org)
255    Date: 2003/09/04 16:30:00 CDT
256    Tag: blume-20030905-slices-etc
257    Description:
258    
259      1. Changed interface to vectors and arrays in Basis to match
260         (draft) Basis spec.
261      2. Added signatures and implementations of slices according to
262         Basis spec.
263      3. Edited source code throughout the system to make it compile again
264         under 1. and 2.  (In some cases code had to be added to have it
265         match the new signatures.)
266      4. MLRISC should be backward-compatible: the copies of the originals
267         of files that needed to change under 3. were retained, the .cm files
268         check the compiler version number and use old versions when
269         appropriate.
270      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
271         dirstream -> string option (in accordance with Basis spec).
272      6. When generating code that counts lines, ml-lex used function
273         CharVector.foldli, taking advantage of its old interface.
274         This has been replaced with the corresponding code from
275         CharVectorSlice.  (html-lex must be re-lexed!)
276      7. BitArray in smlnj-lib/Util has been extended/modified to match the
277         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
278      8. Removed temporary additions (fromInternal, toInternal) from the
279         (now obsolete) IntInf in smlnj-lib/Util.
280      9. Cleaned up structure Byte.
281     10. Added localOffset, scan, and fromString to Date (according to spec).
282         Cleaned/corrected implementation of Date.
283         (Still need to check for correctness; implement better canonicalizeDate.)
284     11. Added "scan" to signature IEEE_REAL.
285     12. Some improvements to IntInf [in particular: efficiency-hack for
286         mod and rem when second operand is 2 (for parity checks).]
287     13. Changed representation of type Time.time, using a single IntInf.int
288         value counting microseconds.  This considerably simplified the
289         implementation of structure Time.  We now support negative time
290         values; scan and fromString handle signs.
291     14. Functor PrimIO now takes two additional arguments (VectorSlice and
292         ArraySlice).
293    
294    ----------------------------------------------------------------------
295    Name: Matthias Blume (blume (at) tti - c (dot) org)
296    Date: 2003/08/28 17:00:00 CDT
297    Tag: blume-20030828-intinf
298    Description:
299    
300    This is a major update which comes with a version number bump
301    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
302    and an implementation of IntInf in the Basis.
303    
304    There are a fairly large number of related changes and updates throughout
305    the system:
306    
307    Basis:
308            - Implemented IntInf.
309            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
310            - Added some missing Real64 operations, most notably Real.toLargeInt.
311            - Added FixedInt as a synonym for Int32.
312    
313    compiler:
314            * Added support for a built-in intinf type.
315              - literals
316              - pattern matching
317              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
318              - overloading on literals and operations
319    
320            This required adding a primitive type intinf, some additional
321            primops, and implementations for several non-trivial intinf
322            operations in Core.  (The intinf type is completely abstract
323            to the compiler; all operations get delegated back to the Core.)
324    
325            * Intinf equality is handled by polyequal.  However, the compiler
326            does not print its usual warning in this case (since polyequal
327            is the right thing to do there).
328    
329            * Improved the organization of structure InlineT.
330    
331            * A word about conversion primops:
332            If conversions involving intinf do not cancel out during
333            CPS contract, then the compiler must insert calls to Core functions.
334            Since all core access must be resolved already during the FLINT
335            translate phase, it would be too late a the time of CPS contract
336            to add new Core calls.  For this reason, conversion primops
337            for intinf carry two arguments:  1. the numeric argument that
338            they are supposed to convert, and 2. the Core function that
339            can help with this conversion if necessary.  If CPS contract
340            eliminates a primop, then the associated Core function becomes
341            dead and goes away.  Intinf conversion primops that do not get
342            eliminated by CPS contract get rewritten into calls of their
343            core functions by a separate, new phase.
344    
345    interactive system:
346            - Control.Print.intinfDepth controls max length of intinf constants
347            being printed. (Analogous to Control.Print.stringDepth.)
348            - Cleanup in printutil and pputil: got rid of unused stuff and
349            duplicates; replaced some of the code with code that makes better
350            use of library functionality.
351    
352    CM:
353            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
354            are no longer silent.
355    
356    CKIT:
357            Fixed mismatched uses of Int32 and LargeInt.  I always decided
358            in favor of LargeInt -- which is now the same as IntInf.
359            CKIT-knowledgable people should check whether this is what's
360            intended and otherwise change things back to using Int32 or
361            FixedInt.
362    
363    Throughout the code:
364            Started using IntInf.int literals and built-in operations
365            (e.g., comparison with 0) where this seems appropriate.
366    
367    
368    ----------------------------------------------------------------------
369    Name: Dave MacQueen (dbm@cs.uchicago.edu)
370    Date: 2003/08/13 11:36:00 CDT
371    Tag: dbm-20030813-mcz-merge1
372    Description:
373    
374    Merging changes from the mcz-branch development branch into trunk.
375    These changes involve replacement of the emulated old prettyprinter
376    interface with direct use of the SML/NJ Lib PP library, and fixing
377    of a couple of bugs (895, 1186) relating to error messages.  A new
378    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
379    has been added.
380    
381    ----------------------------------------------------------------------
382    Name: Matthias Blume (blume (at) tti - c (dot) org)
383    Date: 2003/08/11 15:45:00 CDT
384    Tag: blume-20030811-windows
385    Description:
386    
387    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
388    
389        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
390    
391    This patch restores SML/NJ's ability to run under win32.  There are a
392    number of changes, including fixes for several bugs that had gone
393    unnoticed until now:
394    
395      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
396        trying to run the win32 version from within cygwin.)
397    
398      - There are a number of simple .bat scripts that substitute for their
399        corresponding Unix shell-scripts.  (See below.)
400    
401      - The internals of ml-build have been modified slightly.  The main
402        difference is that instead of calling ".link-sml" (or link-sml.bat)
403        using OS.Process.system, the ML process delegates this task back
404        to the script.  Otherwise problems arise in mixed environments such
405        as Cygwin where scripts look and work like Unix scripts, but
406        where OS.Process.system cannot run them.
407    
408      - In CM, the srcpath pickler used native pathname syntax -- which
409        is incorrect in the case of cross-compilation.  The new pickle format
410        is independent of platform-specific naming conventions.
411    
412      - Path configuration files (such as lib/pathconfig) can now choose
413        between native and standard syntax.  Placing a line of the form
414    
415            standard!
416    
417        into the file causes all subsequent paths to be interpreted using
418        CM standard pathname syntax (= Unix conventions); a line
419    
420            native!
421    
422        switches back to native style.  This was needed so that
423        path config files can be written portably, see src/system/pathconfig.
424    
425      - Runtime system:
426    
427          - win32-filesys.c:  get_file_time and set_file_time now
428            access modification time, not creation time.
429    
430          - I/O code made aware of new array representation.
431    
432          - Bug fixes in X86.prim.masm.
433    
434       - src/system/makeml made aware of win32. (For use under cygwin
435            and other Unix-environments for windows.)
436    
437       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
438         which caused BinIO.inputAll to fail consistently.
439    
440    .bat scripts:
441    
442       Windows .bat scripts assume that SMLNJ_HOME is defined.
443    
444       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
445         applications (sml, ml-yacc, ml-lex).
446       - ml-build.bat: analogous to ml-build.
447       - config\install.bat:  Analogous to config/install.sh.  This requires
448         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
449         (nmake etc. must be on the path, and vcvars32 must have been run.)
450         Moreover, sources for ml-lex and ml-yacc need to exist under src,
451         and the bootfile hierarchy must have been unpacked under
452         sml.boot.x86-win32.
453         The script is very primitive and does a poor job at error checking.
454         It only installs the base system, ml-lex, and ml-yacc.  No other
455         libraries are being installed (i.e., you get only those that
456         are part of the compiler.)
457       - link-sml.bat:  analogous to .link-sml, but not currently used
458    
459    Unrelated bug fixes:
460    
461      - ml-nlffigen now exports structures ST_* corresponding to incomplete
462        types.
463      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
464        otherwise.)
465    
466    ----------------------------------------------------------------------
467    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
468    Date: 2003/06/17
469    Tag: macqueen-20030617-bug895
470    Description:
471    
472    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
473    Tag will be used for new development branch (mcz-branch) for
474    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
475    
476    ----------------------------------------------------------------------
477    Name: Matthias Blume (blume (at) tti - c (dot) org)
478    Date: 2003/05/27 16:55:00 CDT
479    Tag: blume-20030527-polyeq
480    Description:
481    
482    Tried to eliminated most cases of polymorphic equality.
483    
484    ----------------------------------------------------------------------
485    Name: Matthias Blume (blume (at) tti - c (dot) org)
486    Date: 2003/05/21 17:45:00 CDT
487    Tag: blume-20030517-complete
488    Description:
489    
490    Two changes:
491    
492      1. Added a flag for controlling whether non-exhaustive bindings will
493         be treated as errors (default is false).
494      2. Cleaned up the *entire* source tree so that CMB.make goes through
495         without a single non-exhaustive match- or bind warning.
496    
497    ----------------------------------------------------------------------
498    Name: Matthias Blume (blume (at) tti - c (dot) org)
499    Date: 2003/05/17 10:20:00 CDT
500    Tag: blume-20030517-absyn
501    Description:
502    
503    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
504    
505       This mainly affects the quality of error messages.  However, some
506       of the code is now more straightforward than before. (Treatment of
507       the above four constructs in translate.sml is much simpler than
508       the "macro-expansion" that was going on before.  Plus, the mach-
509       compiler no longer gets invoked just to be able to compile an
510       if-expression.)
511    
512    2. The ErrorMsg.Error exception is now caught and absorbed by the
513       interactive loop.
514    
515    ----------------------------------------------------------------------
516    Name: Allen Leung
517    Date: 2003/05/16 13:05:00 CDT
518    Tag: leunga-20030516-cygwin-runtime
519    Description:
520    
521        Ported the runtime system to cygwin, which uses the unix
522    x86-unix bin files.  Missing/buggy features:
523    
524       o getnetbyname, getnetbyaddr: these functions seem to be missing in
525         the Cygwin library.
526       o Ctrl-C handling may be flaky.
527       o Windows system calls and Windows I/O are not supported.
528    
529       A new set of binfiles is located at:
530    
531         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
532    
533       This is only needed for bootstrapping the cygwin version of smlnj.
534       Other x86 versions can use the existing binfiles.
535    
536    ----------------------------------------------------------------------
537    Name: Matthias Blume
538    Date: 2003/04/08 15:42:00 CDT
539    Tag: blume-20030408-listpair
540    Description:
541    
542    1. Added a target 'mlrisc' to installer.
543    
544    2. Added missing elements to structure ListPair.
545    
546    ----------------------------------------------------------------------
547    Name: Allen Leung
548    Date: 2003/01/07 10:40:00 EST
549    Tag: leunga-20030107-int-rem
550    Description:
551    
552    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
553    The arguments to the SUBL instruction were swapped.
554    
555    ----------------------------------------------------------------------
556    Name: Matthias Blume
557    Date: 2002/12/12 16:25:00 EST
558    Tag: blume-20021212-risc-ra
559    Description:
560    
561    Fixed a serious bug in the rewrite code for FP spilling/reloading that
562    sent the RA into an infinite loop when floating point registers get
563    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
564    110.37 and 110.38.)
565    There was another set of potential problems related to the handling of
566    MLRISC annotations (but those did not yet cause real problems, apparently).
567    
568    ----------------------------------------------------------------------
569    Name: Matthias Blume
570    Date: 2002/12/06 22:40:00 EST
571    Tag: blume-20021206-cm-fileid
572    Description:
573    
574    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
575    This fixes the problem of CM getting confused by files that suddenly
576    change their identity (e.g., by getting unlinked and recreated by some
577    text editor such as vi).  There might be a better/cheaper/cleaner way
578    of doing this, but for now this will have to do.
579    
580    ----------------------------------------------------------------------
581    Name: Matthias Blume
582    Date: 2002/10/28 09:50:00 EST
583    Tag: blume-20021028-typecheck
584    Description:
585    
586    Exported structure Typecheck from $smlnj/viscomp/core.cm.
587    
588    ----------------------------------------------------------------------
589    Name: Matthias Blume
590    Date: 2002/10/17 09:10:00 EDT
591    Tag: Release_110_42
592    Description:
593    
594    In good old tradition, there has been a slight hiccup so that we have
595    to patch 110.42 after the fact.   The old release tag has been replaced
596    (see below).
597    
598    The change solves a problem with two competing approaches the
599    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
600    each other's way.
601    
602    This change only affects the runtime system code and the installer script.
603    (No new bootfiles.)
604    
605    ----------------------------------------------------------------------
606    Name: Matthias Blume
607    Date: 2002/10/16 12:00:00 EDT
608    Tag: Release_110_42_removed
609    Description:
610    
611    New working release.  New bootfiles.
612    
613    ----------------------------------------------------------------------
614    Name: Matthias Blume
615    Date: 2002/10/10 13:10:00 EDT
616    Tag: blume-20021010-ppc-divs
617    Description:
618    
619    The mltree operator DIVS must be implemented with an overflow check on
620    the PPC because the hardware indicates divide-by-zero using "overflow" as
621    well.
622    
623    ----------------------------------------------------------------------
624    Name: Matthias Blume
625    Date: 2002/07/23 11:45:00
626    Tag: blume-20020723-smlnj-home
627    Description:
628    
629    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
630    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
631    CM_PATHCONFIG is also set), the path configuration file is assumed
632    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
633    the entire tree to some other place and everything will "just work".
634    
635    (Companion commands such as ml-build and ml-makedepend also sense this
636    variable.)
637    
638    ----------------------------------------------------------------------
639    Name: Matthias Blume
640    Date: 2002/07/12 21:19:00 EDT
641    Tag: blume-20020712-liveness
642    Description:
643    
644    Exported two useful "step" functions from liveness module (MLRISC).
645    
646    ----------------------------------------------------------------------
647    Name: Matthias Blume
648    Date: 2002/07/05 16:00 EDT
649    Tag: Release_110_41
650    Description:
651    
652    New working release.  New bootfiles.
653    
654    ----------------------------------------------------------------------
655    Name: Matthias Blume
656    Date: 2002/07/05 10:25:00 EDT
657    Tag: blume-20020705-btimp
658    Description:
659    
660    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
661    other clients can set up backtracing support.
662    
663    ----------------------------------------------------------------------
664    Name: Matthias Blume
665    Date: 2002/06/25 17:23:00 EDT
666    Tag: blume-20020625-fpmax
667    Description:
668    
669    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
670    case.  (The sense of the isNaN test was reversed -- which made min and
671    max always return their first argument.)
672    
673    ----------------------------------------------------------------------
674    Name: Matthias Blume
675    Date: 2002/06/11
676    Tag: blume-20020611-unixpath
677    Description:
678    
679    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
680    
681    ----------------------------------------------------------------------
682    Name: Matthias Blume
683    Date: 2002/06/10 16:35:00 EDT
684    Tag: blume-20020610-ieeereal
685    Description:
686    
687    I back-ported my implementation of IEEEReal.fromString from the
688    idlbasis-devel branch so that we can test it.
689    
690    Another small change is that ppDec tries to give more information
691    than just "<sig>" in the case of functors.  However, this code is
692    broken in some mysterious way if the functor's body's signature
693    has not been declared by ascription but gets inferred from the
694    implementation.  This needs fixing...
695    
696    ----------------------------------------------------------------------
697    Name: Matthias Blume
698    Date: 2002/05/31
699    Tag: blume-20020531-btrace-mode
700    Description:
701    
702    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
703    the wayside when I switched over to using Controls everywhere.)
704    
705    ----------------------------------------------------------------------
706    Name: Lal George
707    Date: 2002/05/23 12:21:40 EDT
708    Tag: george-20020523-visual-labels
709    Description:
710    
711    Labels are now displayed in the graphical output to make
712    the fall-through and target blocks obvious.
713    
714    ----------------------------------------------------------------------
715    Name: Matthias Blume
716    Date: 2002/05/22 11:03:00 EDT
717    Tag: blume-20020522-shrink
718    Description:
719    
720    John tweaked yesterday's fix for 1131 to handle an out-of-memory
721    situation that comes up when allocating huge arrays.
722    
723    ----------------------------------------------------------------------
724    Name: Matthias Blume
725    Date: 2002/05/21 16:00:00 EDT
726    Tag: Release_110_40
727    Description:
728    
729    New working release (110.40).  New bootfiles.
730    
731    [Also: John Reppy fixed GC bug 1131.]
732    
733    ----------------------------------------------------------------------
734    Name: Matthias Blume
735    Date: 2002/05/21 12:35:00 EDT
736    Tag: blume-20020521-cmdoc
737    Description:
738    
739    CM documentation update.
740    
741    ----------------------------------------------------------------------
742    Name: Matthias Blume
743    Date: 2002/05/21 10:55:00 EDT
744    Tag: blume-20020521-misc
745    Description:
746    
747    - John tweaked runtime to be silent on heap export (except when
748      GC messages are on).
749    - I added a few more things (cross-compiling versions of CMB) to
750      config/preloads (as suggestions).
751    
752    ----------------------------------------------------------------------
753    Name: Matthias Blume
754    Date: 2002/05/20 22:25:00 EDT
755    Tag: blume-20020520-controls
756    Description:
757    
758    - Added ControlUtil structure to control-lib.cm.
759    - Use it throughout.
760    - Used Controls facility to define MLRISC controls (as opposed to
761      registering MLRISC control ref cells with Controls after the fact)
762    - Fixed messed-up controls priorities.
763    
764    * Removed again all the stuff from config/preloads that one wouldn't
765      be able to preload at the time the initial heap image is built.
766      (Many libraries, e.g., CML, do not exist yet at this time.  The
767       only libraries that can be preloaded via config/preloads are those
768       that come bundled with the bootfiles.)
769    
770    ----------------------------------------------------------------------
771    Name: Matthias Blume
772    Date: 2002/05/20 10:59:00 EDT
773    Tag: blume-20020520-preloads
774    Description:
775    
776    Added a lot of commented-out suggestions for things to be included
777    in config/preloads.
778    
779    ----------------------------------------------------------------------
780    Name: Allen Leung
781    Date: 2002/05/18 14:20:00 EDT
782    Tag: leunga-20020518-mdl
783    Description:
784    
785    o Made the mdl tool stuff compile and run again.
786    o I've disabled all the stuff that depends on RTL specifications; they
787      are all badly broken anyway.
788    
789    ----------------------------------------------------------------------
790    Name: Matthias Blume
791    Date: 2002/05/17 16:49:00 EDT
792    Tag: blume-20020517-controls
793    Description:
794    
795    0. John Reppy made several modifications to the SML/NJ library.
796       In particular, there is a shiny new controls-lib.cm.
797    
798    1. Pushed new controls interface through compiler so that everything
799       compiles again.
800    
801    2. Added FormatComb and FORMAT_COMB to the CML version of the
802       SML/NJ library (so that CML compiles again).
803    
804    3. Modified init scripts because XXX_DEFAULT environment variables
805       are no longer with us.  (Boot-time initialization is now done
806       using the same environment variables that are also used for
807       startup-time initialization of controls.)
808    
809    ----------------------------------------------------------------------
810    Name: Lal George
811    Date: 2002/05/15 09:20:10 EDT
812    Tag: george-20020515-pseudo-op-decls
813    Description:
814    
815            All pseudo-ops emitted before the first segment declaration
816    such as TEXT, DATA, and BSS directives are assumed to be global
817    declarations and are emitted first in the assembly file. This is
818    useful in a number of situations where one has pseudo-ops that are not
819    specific to any segment, and also works around the constraint that one
820    cannot have client pseudo-ops in the TEXT segment.
821    
822            Because no segment is associated with these declarations it is
823    an error to allocate any space or objects before the first segment
824    directive and an exception will be raised. However, we cannot make
825    this check for client pseudo-ops.
826    
827            These top level declarations are a field in the CFG graph_info.
828    In theory you can continue to add to this field after the CFG has been
829    built -- provided you know what you are doing;-)
830    
831    ----------------------------------------------------------------------
832    Name: Matthias Blume
833    Date: 2002/05/13 16:40:00 EDT
834    Tag: blume-20020513-pp-etc
835    Description:
836    
837    A few minor bugfixes:
838    
839      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
840        (Bogus printouts for redefined bindings still occur.  Compiler
841        bug should no longer occur now.  We need to redo the prettyprinter
842        from scratch.)
843    
844      - CM pathname printer now also adds escape sequences for ( and )
845    
846      - commend and docu fixes for ml-nlffi
847    
848    ----------------------------------------------------------------------
849    Name: Matthias Blume
850    Date: 2002/05/10 16:40:00 EDT
851    Tag: blume-20020510-erg-textio
852    Description:
853    
854    Applied the following bugfix provided by Emden Gansner:
855    
856        Output is corrupted when outputSubstr is used rather than output.
857    
858        The problem occurs when a substring
859    
860            ss = (s, dataStart, dataLen)
861    
862        where dataStart > 0, fills a stream buffer with avail bytes left.
863        avail bytes of s, starting at index dataStart, are copied into the
864        buffer, the buffer is flushed, and then the remaining dataLen-avail
865        bytes of ss are copied into the beginning of the buffer. Instead of
866        starting this copy at index dataStart+avail in s, the current code
867        starts the copy at index avail.
868    
869        Fix:
870        In text-io-fn.sml, change line 695 from
871             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
872        to
873             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
874    
875    ----------------------------------------------------------------------
876    Name: Matthias Blume
877    Date: 2002/04/12 13:55:00 EDT
878    Tag: blume-20020412-assyntax
879    Description:
880    
881    1. Grabbed newer assyntax.h from the XFree86 project.
882    2. Fiddled with how to compile X86.prim.asm without warnings.
883    3. (Very) Minor cleanup in CM.
884    
885    ----------------------------------------------------------------------
886    Name: Matthias Blume
887    Date: 2002/04/01 (no joke!) 17:07:00 EST
888    Tag: blume-20020401-x86div
889    Description:
890    
891    Added full support for div/mod/rem/quot on the x86, using the machine
892    instruction's two results (without clumsily recomputing the remainder)
893    directly where appropriate.
894    
895    Some more extensive power-of-two support was added to the x86 instruction
896    selector (avoiding expensive divs, mods, and muls where they can be
897    replaced with cheaper shifts and masks).  However, this sort of thing
898    ought to be done earlier, e.g., within the CPS optimizer so that
899    all architectures benefit from it.
900    
901    The compiler compiles to a fixed point, but changes might be somewhat
902    fragile nevertheless.  Please, report any strange things that you might
903    see wrt. div/mod/quot/rem...
904    
905    ----------------------------------------------------------------------
906    Name: Matthias Blume
907    Date: 2002/03/29 17:22:00
908    Tag: blume-20020329-div
909    Description:
910    
911    Fixed my broken div/mod logic.  Unfortunately, this means that the
912    inline code for div/mod now has one more comparison than before.
913    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
914    The problem was with quotient = 0, because that alone does not tell
915    us which way the rounding went.  One then has to look at whether
916    remainder and divisor have the same sign...  :(
917    
918    Anyway, I replaced the bootfiles with fresh ones...
919    
920    ----------------------------------------------------------------------
921    Name: Matthias Blume
922    Date: 2002/03/29 14:10:00 EST
923    Tag: blume-20020329-inlprims
924    Description:
925    
926    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
927    
928    Primops have changed. This means that the bin/boot-file formats have
929    changed as well.
930    
931    To make sure that there is no confusion, I made a new version.
932    
933    
934    CHANGES:
935    
936    * removed REMT from mltree (remainder should never overflow).
937    
938    * added primops to deal with divisions of all flavors to the frontend
939    
940    * handled these primops all the way through so they map to their respective
941      MLRISC support
942    
943    * used these primops in the implementation of Int, Int32, Word, Word32
944    
945    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
946    
947    * parameterized INLMIN, INLMAX, and INLABS by a numkind
948    
949    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
950      floating point
951    
952    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
953      and Real (but Real.abs maps to a separate floating-point-only primop)
954    
955    
956    TODO items:
957    
958    * Hacked Alpha32 instruction selection, disabling the selection of REMx
959      instructions because the machine instruction encoder cannot handle
960      them.  (Hppa, PPC, and Sparc instruction selection did not handle
961      REM in the first place, and REM is supported by the x86 machine coder.)
962    
963    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
964      selection phase.  (The two can be streamlined because the hardware
965      delivers both quotient and remainder at the same time anyway.)
966    
967    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
968      (Currently the behavior is inconsistent both across architectures and
969      wrt. the draft Basis spec.)
970    
971    * Word8 should eventually be handled natively, too.
972    
973    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
974      as if there currently is no execution path that could trigger it in
975      SML/NJ.  (The assumptions underlying functions arith and promotable do not
976      hold for things like multiplication and division.)
977    
978    ----------------------------------------------------------------------
979    Name: Matthias Blume
980    Date: 2002/03/27 16:27:00 EST
981    Tag: blume-20020327-mlrisc-divisions
982    Description:
983    
984    Added support for all four division operations (ML's div, mod, quot,
985    and rem) to MLRISC.  In the course of doing so, I also rationalized
986    the naming (no more annoying switch-around of DIV and QUOT), by
987    parameterizing the operation by div_rounding_mode (which can be either
988    DIV_TO_ZERO or DIV_TO_NEGINF).
989    
990    The generic MLTreeGen functor takes care of compiling all four
991    operations down to only round-to-zero div.
992    
993    Missing pieces:
994    
995      * Doing something smarter than relying on MLTreeGen on architectures
996        like, e.g., the x86 where hardware division delivers both quotient and
997        remainder at the same time.  With this, the implementation of the
998        round-to-neginf operations could be further streamlined.
999    
1000      * Remove inlining support for div/mod/rem from the frontend and replace it
1001        with primops that get carried through to the backend.  Do this for all
1002        int and word types.
1003    
1004    ----------------------------------------------------------------------
1005    Name: Matthias Blume
1006    Date: 2002/03/25 17:25:00 EST
1007    Tag: blume-20020325-divmod
1008    Description:
1009    
1010    I improved (hopefully without breaking them) the implementation of Int.div,
1011    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1012    advantage of the following observations:
1013    
1014      Let  q = x quot y      r = x rem y
1015           d = x div  y      m = x mod y
1016    
1017    where "quot" is the round-to-zero version of integer division that
1018    hardware usually provides.  Then we have:
1019    
1020         r = x - q * y        where neither the * nor the - will overflow
1021         d = if q >= 0 orelse x = q * y then q else q - 1
1022                              where neither the * nor the - will overflow
1023         m = if q >= 0 orelse r = 0 then r else r + y
1024                              where the + will not overflow
1025    
1026    This results in substantial simplification of the generated code.
1027    The following table shows the number of CFG nodes and edges generated
1028    for
1029            fun f (x, y) = x OPER y
1030            (* with OPER \in div, mod, quot, rem *)
1031    
1032    
1033        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1034        --------------------------------------------------------
1035         div |         24 |         39 |         12 |         16
1036         mod |         41 |         71 |         12 |         16
1037        quot |          8 |         10 |          8 |         10
1038         rem |         10 |         14 |          8 |         10
1039    
1040    
1041    ----------------------------------------------------------------------
1042    Name: Matthias Blume
1043    Date: 2002/03/25 22:06:00 EST
1044    Tag: blume-20020325-cprotobug
1045    Description:
1046    
1047    Fixed a bug in cproto (c prototype decoder).
1048    
1049    ----------------------------------------------------------------------
1050    Name: Matthias Blume
1051    Date: 2002/03/25 16:00:00 EST
1052    Tag: blume-20020325-raw-primops
1053    Description:
1054    
1055    I did some cleanup to Allen's new primop code and
1056    replaced yesterday's bootfiles with new ones.
1057    (But they are stored in the same place.)
1058    
1059    ----------------------------------------------------------------------
1060    Name: Matthias Blume
1061    Date: 2002/03/24 22:40:00 EST
1062    Tag: blume-20020324-bootfiles
1063    Description:
1064    
1065    Made the bootfiles that Allen asked for.
1066    
1067    ----------------------------------------------------------------------
1068    Name: Allen Leung
1069    Date: 2002/03/23 15:50:00 EST
1070    Tag: leunga-20020323-flint-cps-rcc-primops
1071    Description:
1072    
1073      1. Changes to FLINT primops:
1074    
1075        (* make a call to a C-function;
1076         * The primop carries C function prototype information and specifies
1077         * which of its (ML-) arguments are floating point. C prototype
1078         * information is for use by the backend, ML information is for
1079         * use by the CPS converter. *)
1080      | RAW_CCALL of { c_proto: CTypes.c_proto,
1081                       ml_args: ccall_type list,
1082                       ml_res_opt: ccall_type option,
1083                       reentrant : bool
1084                     } option
1085       (* Allocate uninitialized storage on the heap.
1086        * The record is meant to hold short-lived C objects, i.e., they
1087        * are not ML pointers.  With the tag, the representation is
1088        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1089        *)
1090      | RAW_RECORD of {tag:bool,sz:int}
1091      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1092    
1093      2.  These CPS primops are now overloaded:
1094    
1095           rawload of {kind:numkind}
1096           rawstore of {kind:numkind}
1097    
1098          The one argument form is:
1099    
1100             rawload {kind} address
1101    
1102          The two argument form is:
1103    
1104             rawload {kind} [ml object, byte-offset]
1105    
1106      3. RAW_CCALL/RCC now takes two extra arguments:
1107    
1108         a. The first is whether the C call is reentrant, i.e., whether
1109            ML state should be saved and restored.
1110         b. The second argument is a string argument specifying the name of
1111            library and the C function.
1112    
1113         These things are currently not handled in the code generator, yet.
1114    
1115      4. In CProto,
1116    
1117         An encoding type of "bool" means "ml object" and is mapped into
1118         C prototype of PTR.  Note that "bool" is different than "string",
1119         even though "string" is also mapped into PTR, because "bool"
1120         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1121    
1122      5. Pickler/unpicker
1123    
1124         Changed to handle RAW_RECORD and newest RAW_CCALL
1125    
1126      6. MLRiscGen,
1127    
1128         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1129         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1130            in the file CodeGen/cpscompile/cps-c-calls.sml
1131    
1132      7. Added the conditional move operator
1133    
1134             condmove of branch
1135    
1136         to cps.  Generation of this is still buggy so it is currently
1137         disabled.
1138    
1139    ----------------------------------------------------------------------
1140    Name: Lal George
1141    Date: 2002/03/22 14:18:25 EST
1142    Tag: george-20020322-cps-branch-prob
1143    Description:
1144    
1145    Implemented the Ball-Larus branch prediction-heuristics, and
1146    incorporated graphical viewers for control flow graphs.
1147    
1148    Ball-Larus Heuristics:
1149    ---------------------
1150    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1151    
1152    By design it uses the Dempster-Shafer theory for combining
1153    probabilities.  For example, in the function:
1154    
1155        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1156    
1157    the ball-larus heuristics predicts that the n=0 is unlikely
1158    (OH-heuristic), and the 'then' branch is unlikely because of the
1159    RH-heuristic -- giving the 'then' branch an even lower combined
1160    probability using the Dempster-Shafer theory.
1161    
1162    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1163    probability of the 'then' branch because of the loop in the else
1164    branch.
1165    
1166    
1167    Graphical Viewing:
1168    ------------------
1169    I merely plugged in Allen's graphical viewers into the compiler. The
1170    additional code is not much. At the top level, saying:
1171    
1172            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1173    
1174    will display the graphical view of the control flow graph just before
1175    back-patching.  daVinci must be in your path for this to work. If
1176    daVinci is not available, then the default viewer can be changed
1177    using:
1178    
1179            Control.MLRISC.getString "viewer"
1180    
1181    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1182    course, these viewers must be in your path.
1183    
1184    The above will display the compilation unit at the level of clusters,
1185    many of which are small, boring, and un-interesting. Also setting:
1186    
1187            Control.MLRISC.getInt "cfg-graphical-view_size"
1188    
1189    will display clusters that are larger than the value set by the above.
1190    
1191    
1192    ----------------------------------------------------------------------
1193    Name: Matthias Blume
1194    Date: 2002/03/21 22:20:00 EST
1195    Tag: blume-20020321-kmp-bugfix
1196    Description:
1197    
1198    Changed the interface to the KMP routine in PreString and fixed
1199    a minor bug in one place where it was used.
1200    
1201    ----------------------------------------------------------------------
1202    Name: Allen Leung
1203    Date: 2002/03/21 20:30:00 EST
1204    Tag: leunga-20020321-cfg
1205    Description:
1206    
1207      Fixed a potential problem in cfg edge splitting.
1208    
1209    ----------------------------------------------------------------------
1210    Name: Allen Leung
1211    Date: 2002/03/21 17:15:00 EST
1212    Tag: leunga-20020321-x86-fp-cfg
1213    Description:
1214    
1215      1. Recoded the buggy parts of x86-fp.
1216    
1217         a. All the block reordering code has been removed.
1218            We now depend on the block placement phases to do this work.
1219    
1220         b. Critical edge splitting code has been simplified and moved into the
1221            CFG modules, as where they belong.
1222    
1223         Both of these were quite buggy and complex.  The code is now much, much
1224         simpler.
1225    
1226      2. X86 backend.
1227    
1228         a. Added instructions for 64-bit support.  Instruction selection for
1229            64-bit has not been committed, however, since that
1230            requires changes to MLTREE which haven't been approved by
1231            Lal and John.
1232    
1233         b. Added support for FUCOMI and FUCOMIP when generating code for
1234            PentiumPro and above.  We only generate these instructions in
1235            the fast-fp mode.
1236    
1237         c. Added cases for JP and JNP in X86FreqProps.
1238    
1239      3. CFG
1240    
1241         CFG now has a bunch of methods for edge splitting and merging.
1242    
1243      4. Machine description.
1244    
1245         John's simplification of MLTREE_BASIS.fcond broke a few machine
1246         description things:
1247    
1248         rtl-build.{sig,sml} and hppa.mdl fixed.
1249    
1250         NOTE: the machine description stuff in the repository is still broken.
1251               Again, I can't put my fixes in because that involves
1252               changes to MLTREE.
1253    
1254    ----------------------------------------------------------------------
1255    Name: Matthias Blume
1256    Date: 2002/03/20 15:55:00 EST
1257    Tag: blume-20020320-kmp
1258    Description:
1259    
1260    Implemented Knuth-Morris-Pratt string matching in PreString and used
1261    it for String.isSubstring, Substring.isSubstring, and
1262    Substring.position.
1263    
1264    (Might need some stress-testing.  Simple examples worked fine.)
1265    
1266    ----------------------------------------------------------------------
1267  Name: Matthias Blume  Name: Matthias Blume
1268  Date: 2002/03/19 16:37:00 EST  Date: 2002/03/19 16:37:00 EST
1269  Tag: blume-20020319-witnesses  Tag: blume-20020319-witnesses

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