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

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revision 1158, Fri Mar 22 01:21:25 2002 UTC revision 1486, Tue May 11 17:04:01 2004 UTC
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13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/05/11 12:05:00 CDT
18    Tag: blume-20040511-exports
19    Description:
20    
21    As per request by Adam Chlipala <adam@hcoop.net>, extended various
22    export lists in compiler-related .cm-files.
23    
24    ----------------------------------------------------------------------
25    Name: Matthias Blume (blume (at) tti - c (dot) org)
26    Date: 2004/05/11 11:35:00 CDT
27    Tag: blume-20040511-allsource
28    Description:
29    
30    The installer now honors the "src-smlnj" target again, although its meaning
31    has changed from "all sources required for the compiler" to "all sources
32    the installer knows about".  In other words, if you enable "src-smlnj"
33    in the "targets" file, then the installer will pull in sources for
34    everything.  (Notice that this refers to source code only.  Compiled
35    code is still only installed for modules that were requested explicitly
36    or which are required for other modules that were requested explicitly.)
37    
38    ----------------------------------------------------------------------
39    Name: Matthias Blume (blume (at) tti - c (dot) org)
40    Date: 2004/04/23 17:40:00 CDT
41    Tag: blume-20040423-ieee-scan
42    Description:
43    
44    Fixed IEEEReal.scan (and .fromString) so that if there is an overflow
45    in the exponent calculation we get INF or ZERO (depending on the mantissa
46    and the sign of the exponent).
47    
48    ----------------------------------------------------------------------
49    Name: Matthias Blume (blume (at) tti - c (dot) org)
50    Date: 2004/04/23 10:40:00 CDT
51    Tag: blume-20040423-ml-build
52    Description:
53    
54    The ml-build script now terminates with a non-0 status when something
55    goes wrong.
56    
57    ----------------------------------------------------------------------
58    Name: Matthias Blume (blume (at) tti - c (dot) org)
59    Date: 2004/04/22 16:35:00 CDT
60    Tag: blume-20040422-Option
61    Description:
62    
63    Made exception Option to be the same as exception Option.Option
64    (as it should be).
65    
66    ----------------------------------------------------------------------
67    Name: Allen Leung (leunga (at) reservoir (dot) com)
68    Date: 2004/03/19 14:40:00 EST
69    Tag: leunga-20040319-cygwin-nlffi
70    Description:
71    
72    Fixed the runtime so that ml-nlffi-lib runs on the cygwin version
73    of SML/NJ.  The problem is that
74    
75       lib = dlopen(NULL, ...)
76       f   = dlsym(lib, "malloc");
77    
78    does not work on Windows unless we explicitly export symbols
79    such as 'malloc' during linking.  We fixed this by explicitly
80    exporting the required symbols with the magic gcc incantation:
81    
82        -Wl,--export-all cygwin.def
83    
84    where cygwin.def is a file containing all the symbols that
85    we wish to export.
86    
87    I suspect this is a Windows problem and we'll have to
88    do the same (somehow with windows compilers) when
89    we build the native win32 version with the system
90    calls LoadLibrary/GetProcAddress.
91    
92    ----------------------------------------------------------------------
93    Name: Matthias Blume (blume (at) tti - c (dot) org)
94    Date: 2004/03/04 16:35:00 CST
95    Tag: blume-20040304-intinf-fmt
96    Description:
97    
98    Fixed problem with IntInf.fmt (sign would show up on the right instead
99    of on the left for BIN, OCT, and HEX).
100    
101    ----------------------------------------------------------------------
102    Name: Matthias Blume (blume (at) tti - c (dot) org)
103    Date: 2004/03/04 11:25:00 CST
104    Tag: blume-20040304-symlinks
105    Description:
106    
107    Fixed problem with installer script (unix only) where bin/ml-yacc and
108    friends pointed (via symlinks) to absolute locations instead of just
109    .run-sml.  This was reported by Vesa A Norrman.
110    
111    ----------------------------------------------------------------------
112    Name: Matthias Blume (blume (at) tti - c (dot) org)
113    Date: 2004/02/13 14:50:00 CST
114    Tag: Release_110_45
115    Description:
116    
117    New working version (110.45). New bootfiles.
118    
119    ----------------------------------------------------------------------
120    Name: Matthias Blume (blume (at) tti - c (dot) org)
121    Date: 2004/01/26 15:15:15 CST
122    Tag: blume-20040126-toplevel
123    Description:
124    
125    Improved handling of exceptions at the interactive toplevel.
126    
127    ----------------------------------------------------------------------
128    Name: Matthias Blume (blume (at) tti - c (dot) org)
129    Date: 2004/01/26 11:25:00
130    Tag: blume-20040126-app
131    Description:
132    
133    Type of top-level "app" corrected.
134    Added code for setting vp_limitPtrMask to Win32-specific runtime.
135    
136    ----------------------------------------------------------------------
137    Name: Matthias Blume (blume (at) tti - c (dot) org)
138    Date: 2003/11/18 17:10 CST
139    Tag: blume-20031118-basis-fiddle
140    Description:
141    
142    - changed Timer interface to what might become the spec
143    - POSIX_FLAGS -> BIT_FLAGS according to spec
144    - some other minor discrepancies wrt. spec eliminated
145    
146    ----------------------------------------------------------------------
147    Name: Matthias Blume (blume (at) tti - c (dot) org)
148    Date: 2003/11/06 12:00:00 CST
149    Tag: Release_110_44
150    Description:
151    
152    New working version (110.44). New bootfiles.
153    
154    ----------------------------------------------------------------------
155    Name: Matthias Blume (blume (at) tti - c (dot) org)
156    Date: 2003/11/04 11:50:00 CST
157    Tag: blume-20031104-move-libraries
158    Description:
159    
160    Eliminated the "dont_move_libraries" directive in config/targets.
161    (The mechanism was broken and could not be fixed easily.  Moreover,
162    there does not seem to be any reason not to move all libraries into
163    lib during installation.  I originally implemented this directive as a
164    backward-compatibility feature when I first introduced the new CM.
165    Now that things have been stable for a long time and going back to the
166    old CM is not an option, there is no reason to keep it around.)
167    
168    ----------------------------------------------------------------------
169    Name: Matthias Blume (blume (at) tti - c (dot) org)
170    Date: 2003/11/03 16:00:00 CST
171    Tag: blume-20031103-installdir
172    Description:
173    
174    Made installer honor INSTALLDIR variable again.  (Thanks to Chris
175    Richards for pointing out the problem and providing the solution.)
176    
177    ----------------------------------------------------------------------
178    Name: Matthias Blume (blume (at) tti - c (dot) org)
179    Date: 2003/10/01 17:05:00 CDT
180    Tag: blume-20031001-lal-mlrisc
181    Description:
182    
183    MLRISC bug fix from Lal.
184    
185    ----------------------------------------------------------------------
186    Name: Matthias Blume (blume (at) tti - c (dot) org)
187    Date: 2003/09/30 16:10:00 CDT
188    Tag: blume-20030930-primio-bat
189    Description:
190    
191    1. Added openVector, nullRd, and nullWr to PRIM_IO.
192    2. Improved .bat files (for Win32 port) to make things work under Win95.
193       (thanks to Aaron S. Hawley for this one)
194    
195    ----------------------------------------------------------------------
196    Name: Matthias Blume (blume (at) tti - c (dot) org)
197    Date: 2003/09/26 16:05:00 CDT
198    Tag: blume-20030926-wrappriv
199    Description:
200    
201    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
202    
203    ----------------------------------------------------------------------
204    Name: Matthias Blume (blume (at) tti - c (dot) org)
205    Date: 2003/09/26 15:00:00 CDT
206    Tag: blume-20030926-110_43_3
207    Description:
208    
209    - additional cleanup
210    - version number bump, NEW BOOTFILES
211    
212    ----------------------------------------------------------------------
213    Name: Matthias Blume (blume (at) tti - c (dot) org)
214    Date: 2003/09/26 12:00:00 CDT
215    Tag: blume-20030926-ppautoload
216    Description:
217    
218    I modified the read-eval-print loop so that the autoloader gets
219    invoked whenever the prettyprinter tries to look up a symbol that
220    is not currently defined in the toplevel environment but which
221    appears in CM's autoload registry.  As a result, we see far fewer of
222    those ?.Foo.Bar.xxx names in the prettyprinter's output.
223    
224    In addition to this I tried to clean up some pieces of the Basis
225    implementation (e.g., Socket, Word8Array) in order to prevent other
226    instances of these ?.Foo.Bar.xxx names from being printed.
227    
228    The mechanism that picks names for types still needs some work, though.
229    (Right now it seems that if there is a type A.t which is defined to
230    be B.u, but B is unavailable at toplevel, then A.t gets printed as
231    "?.B.u" although the perhaps more sensible solution would be to use
232    "A.t" in this case.  In other words, the prettyprinter should follow
233    a chain of DEFtycs not farther than there are corresponding toplevel
234    names in the current environment.)
235    
236    ----------------------------------------------------------------------
237    Name: Matthias Blume (blume (at) tti - c (dot) org)
238    Date: 2003/09/24 16:31:00 CDT
239    Tag: blume-20030924-installer
240    Description:
241    
242    Another installer tweak:  All the ML code for the installer is now
243    compiled during CMB.make and put into a little library called
244    $smlnj/installer.cm.  The installation then simply invokes
245    
246       sml -m $smlnj/installer.cm
247    
248    and everything happens automagically.
249    
250    Win32:  ML code senses value of environment variable SMLNJ_HOME.
251    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
252            and BINDIR.
253    
254    The new scheme guarantees that the ML code responsible for the installation
255    is in sync with the APIs of the main system.  Also, the installer is
256    somewhat faster because the installer script is precompiled.
257    
258    ----------------------------------------------------------------------
259    Name: Matthias Blume (blume (at) tti - c (dot) org)
260    Date: 2003/09/24 15:35:00 CDT
261    Tag: blume-20030924-synsock
262    Description:
263    
264    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
265    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
266    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
267    implementations of non-blocking operations from CML's Socket
268    structure.
269    
270    ----------------------------------------------------------------------
271    Name: Matthias Blume (blume (at) tti - c (dot) org)
272    Date: 2003/09/24 15:10:05 CDT
273    Tag: blume-20030924-sockets
274    Description:
275    
276    1. Fixed SOCKET API and implementation to match Basis spec.
277       This required changing the internal representation of sockets to one
278       that remembers (for each socket file descriptor) whether it is currently
279       blocking or non-blocking.  This state is maintained lazily (i.e., a system
280       call is made only if the state actually needs to change).
281    
282    2. OS-specific details of sockets were moved into separate files, thus
283       making it possible to unify the bulk of the socket implementations
284       between Unix and Win32.
285    
286    3. CML's socket API changed accordingly.
287       (Note that we need to remove non-blocking functions from this API
288       since they are redundant in the case of CML!)
289    
290    4. CML's socket implementation now makes use of non-blocking functions
291       provided by Basis, thus removing all OS-dependent code from this part
292       of CML.
293    
294    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
295    
296    ----------------------------------------------------------------------
297    Name: Matthias Blume (blume (at) tti - c (dot) org)
298    Date: 2003/09/22 12:10:00 CDT
299    Tag: blume-20030922-110_43_2
300    Description:
301    
302    Made a new interim version and bootfiles for developer's bootstrapping
303    convenience.
304    
305       110.43.2 -- NEW BOOTFILES
306    
307    ----------------------------------------------------------------------
308    Name: Matthias Blume (blume (at) tti - c (dot) org)
309    Date: 2003/09/19 15:55:00 CDT
310    Tag: blume-20030919-cmdir
311    Description:
312    
313    1. new-install.sh -> install.sh
314    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
315    3. tweaked installer so that another name instead of .cm can be chosen
316       at install time (by setting the CM_DIR_ARC environment variable
317       during installation); once installation is complete, the name is
318       fixed
319    
320    ----------------------------------------------------------------------
321    Name: Matthias Blume (blume (at) tti - c (dot) org)
322    Date: 2003/09/18 16:00:00 CDT
323    Tag: blume-20030918-110_43_1
324    Description:
325    
326    Made a new interim version and bootfiles for developer's bootstrapping
327    convenience.
328    
329       110.43.1 -- NEW BOOTFILES
330    
331    ----------------------------------------------------------------------
332    Name: Matthias Blume (blume (at) tti - c (dot) org)
333    Date: 2003/09/18 15:20:00 CDT
334    Tag: blume-20030918-misc
335    Description:
336    
337    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
338       this seems to be controversial at the moment) and used those in
339       Posix.ProcEnv.times.
340    
341    2. Added Time.{from,to}Nanoseconds to Time.
342    
343    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
344       For example, fromLargeInt never needs to look at more than 3 "big
345       digits" to get its 53 bits of precision.
346    
347    ----------------------------------------------------------------------
348    Name: Matthias Blume (blume (at) tti - c (dot) org)
349    Date: 2003/09/17 16:30:00 CDT
350    Tag: blume-20030917-real32-slices
351    Description:
352    
353    Added an entry to the primitive environment
354    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
355    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
356    
357    Removed some of the "magic" constants in real64.sml and replaced them
358    with code that generates these values from their corresponding
359    integer counterparts.
360    
361    Made all(?) the slice-related changes to the Basis and made everything
362    compile again...
363    
364    ----------------------------------------------------------------------
365    Name: Matthias Blume (blume (at) tti - c (dot) org)
366    Date: 2003/09/15 17:45:00 CDT
367    Tag: blume-20030915-rbase
368    Description:
369    
370    Fixed bug in Real.fromLargeInt.
371    
372    ----------------------------------------------------------------------
373    Name: Matthias Blume (blume (at) tti - c (dot) org)
374    Date: 2003/09/13 18:11:00 CDT
375    Tag: blume-20030913-libinstall
376    Description:
377    
378    Minor bugfix in config/libinstall (set anchor with path to
379    standalone tool after installing it, otherwise libraries that
380    need ml-lex or ml-yacc won't compile the first time the installer
381    runs).
382    
383    ----------------------------------------------------------------------
384    Name: Matthias Blume (blume (at) tti - c (dot) org)
385    Date: 2003/09/12 11:45:00 CDT
386    Tag: blume-20030912-various
387    Description:
388    
389     - fixed bug in Real.toLargeInt
390     - fixed bug in Posix.ProcEnv.times
391     - changed inputLine functions to return an option
392     - minor installer improvements / bugfixes
393     - changed default @SMLalloc parameter for x86/celeron to 64k
394    
395    ----------------------------------------------------------------------
396    Name: Matthias Blume (blume (at) tti - c (dot) org)
397    Date: 2003/09/09 22:00:00 CDT
398    Tag: Release_110_43
399    Description:
400    
401        New working release 110.43.  New bootfiles.
402    
403    ----------------------------------------------------------------------
404    Name: Matthias Blume (blume (at) tti - c (dot) org)
405    Date: 2003/09/09 19:20:00 CDT
406    Tag: blume-20030909-installer
407    Description:
408    
409    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
410    Modified config/install.bat to take advantage of it.  Also modified
411    config/install.sh (and called it config/new-install.sh) to take advantage
412    of it on Unix systems.  (The SML code is (supposed to be) platform-
413    independent.)
414    
415    The installer can now install everything under Win32
416    as well as under *nix as long as it compiles.
417    
418    Other changes:
419    
420      - made CML compile again under Win32
421      - made eXene compile under Win32 (by providing a fake structure UnixSock
422        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
423      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
424        same as type int;  under Win32 it isn't
425      - fixed some slice-related problems in the win32-specific parts of CML
426      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
427        (under Win32, the volume name is case-insensitive, and the
428        OS.Path code compares volume names for equality)
429    
430    ----------------------------------------------------------------------
431    Name: Matthias Blume (blume (at) tti - c (dot) org)
432    Date: 2003/09/08 11:55:00 CDT
433    Tag: blume-20030908-fullpath
434    Description:
435    
436    Made Win32 version of OS.FileSys.fullPath return current directory
437    when given an empty string.  This is what the spec says, and incidentally,
438    CM depends on it.  (CM otherwise goes into an infinite loop in certain
439    cases when presented with the name of a non-existing .cm file.)
440    
441    ----------------------------------------------------------------------
442    Name: Matthias Blume (blume (at) tti - c (dot) org)
443    Date: 2003/09/04 16:30:00 CDT
444    Tag: blume-20030905-slices-etc
445    Description:
446    
447      1. Changed interface to vectors and arrays in Basis to match
448         (draft) Basis spec.
449      2. Added signatures and implementations of slices according to
450         Basis spec.
451      3. Edited source code throughout the system to make it compile again
452         under 1. and 2.  (In some cases code had to be added to have it
453         match the new signatures.)
454      4. MLRISC should be backward-compatible: the copies of the originals
455         of files that needed to change under 3. were retained, the .cm files
456         check the compiler version number and use old versions when
457         appropriate.
458      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
459         dirstream -> string option (in accordance with Basis spec).
460      6. When generating code that counts lines, ml-lex used function
461         CharVector.foldli, taking advantage of its old interface.
462         This has been replaced with the corresponding code from
463         CharVectorSlice.  (html-lex must be re-lexed!)
464      7. BitArray in smlnj-lib/Util has been extended/modified to match the
465         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
466      8. Removed temporary additions (fromInternal, toInternal) from the
467         (now obsolete) IntInf in smlnj-lib/Util.
468      9. Cleaned up structure Byte.
469     10. Added localOffset, scan, and fromString to Date (according to spec).
470         Cleaned/corrected implementation of Date.
471         (Still need to check for correctness; implement better canonicalizeDate.)
472     11. Added "scan" to signature IEEE_REAL.
473     12. Some improvements to IntInf [in particular: efficiency-hack for
474         mod and rem when second operand is 2 (for parity checks).]
475     13. Changed representation of type Time.time, using a single IntInf.int
476         value counting microseconds.  This considerably simplified the
477         implementation of structure Time.  We now support negative time
478         values; scan and fromString handle signs.
479     14. Functor PrimIO now takes two additional arguments (VectorSlice and
480         ArraySlice).
481    
482    ----------------------------------------------------------------------
483    Name: Matthias Blume (blume (at) tti - c (dot) org)
484    Date: 2003/08/28 17:00:00 CDT
485    Tag: blume-20030828-intinf
486    Description:
487    
488    This is a major update which comes with a version number bump
489    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
490    and an implementation of IntInf in the Basis.
491    
492    There are a fairly large number of related changes and updates throughout
493    the system:
494    
495    Basis:
496            - Implemented IntInf.
497            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
498            - Added some missing Real64 operations, most notably Real.toLargeInt.
499            - Added FixedInt as a synonym for Int32.
500    
501    compiler:
502            * Added support for a built-in intinf type.
503              - literals
504              - pattern matching
505              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
506              - overloading on literals and operations
507    
508            This required adding a primitive type intinf, some additional
509            primops, and implementations for several non-trivial intinf
510            operations in Core.  (The intinf type is completely abstract
511            to the compiler; all operations get delegated back to the Core.)
512    
513            * Intinf equality is handled by polyequal.  However, the compiler
514            does not print its usual warning in this case (since polyequal
515            is the right thing to do there).
516    
517            * Improved the organization of structure InlineT.
518    
519            * A word about conversion primops:
520            If conversions involving intinf do not cancel out during
521            CPS contract, then the compiler must insert calls to Core functions.
522            Since all core access must be resolved already during the FLINT
523            translate phase, it would be too late a the time of CPS contract
524            to add new Core calls.  For this reason, conversion primops
525            for intinf carry two arguments:  1. the numeric argument that
526            they are supposed to convert, and 2. the Core function that
527            can help with this conversion if necessary.  If CPS contract
528            eliminates a primop, then the associated Core function becomes
529            dead and goes away.  Intinf conversion primops that do not get
530            eliminated by CPS contract get rewritten into calls of their
531            core functions by a separate, new phase.
532    
533    interactive system:
534            - Control.Print.intinfDepth controls max length of intinf constants
535            being printed. (Analogous to Control.Print.stringDepth.)
536            - Cleanup in printutil and pputil: got rid of unused stuff and
537            duplicates; replaced some of the code with code that makes better
538            use of library functionality.
539    
540    CM:
541            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
542            are no longer silent.
543    
544    CKIT:
545            Fixed mismatched uses of Int32 and LargeInt.  I always decided
546            in favor of LargeInt -- which is now the same as IntInf.
547            CKIT-knowledgable people should check whether this is what's
548            intended and otherwise change things back to using Int32 or
549            FixedInt.
550    
551    Throughout the code:
552            Started using IntInf.int literals and built-in operations
553            (e.g., comparison with 0) where this seems appropriate.
554    
555    
556    ----------------------------------------------------------------------
557    Name: Dave MacQueen (dbm@cs.uchicago.edu)
558    Date: 2003/08/13 11:36:00 CDT
559    Tag: dbm-20030813-mcz-merge1
560    Description:
561    
562    Merging changes from the mcz-branch development branch into trunk.
563    These changes involve replacement of the emulated old prettyprinter
564    interface with direct use of the SML/NJ Lib PP library, and fixing
565    of a couple of bugs (895, 1186) relating to error messages.  A new
566    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
567    has been added.
568    
569    ----------------------------------------------------------------------
570    Name: Matthias Blume (blume (at) tti - c (dot) org)
571    Date: 2003/08/11 15:45:00 CDT
572    Tag: blume-20030811-windows
573    Description:
574    
575    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
576    
577        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
578    
579    This patch restores SML/NJ's ability to run under win32.  There are a
580    number of changes, including fixes for several bugs that had gone
581    unnoticed until now:
582    
583      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
584        trying to run the win32 version from within cygwin.)
585    
586      - There are a number of simple .bat scripts that substitute for their
587        corresponding Unix shell-scripts.  (See below.)
588    
589      - The internals of ml-build have been modified slightly.  The main
590        difference is that instead of calling ".link-sml" (or link-sml.bat)
591        using OS.Process.system, the ML process delegates this task back
592        to the script.  Otherwise problems arise in mixed environments such
593        as Cygwin where scripts look and work like Unix scripts, but
594        where OS.Process.system cannot run them.
595    
596      - In CM, the srcpath pickler used native pathname syntax -- which
597        is incorrect in the case of cross-compilation.  The new pickle format
598        is independent of platform-specific naming conventions.
599    
600      - Path configuration files (such as lib/pathconfig) can now choose
601        between native and standard syntax.  Placing a line of the form
602    
603            standard!
604    
605        into the file causes all subsequent paths to be interpreted using
606        CM standard pathname syntax (= Unix conventions); a line
607    
608            native!
609    
610        switches back to native style.  This was needed so that
611        path config files can be written portably, see src/system/pathconfig.
612    
613      - Runtime system:
614    
615          - win32-filesys.c:  get_file_time and set_file_time now
616            access modification time, not creation time.
617    
618          - I/O code made aware of new array representation.
619    
620          - Bug fixes in X86.prim.masm.
621    
622       - src/system/makeml made aware of win32. (For use under cygwin
623            and other Unix-environments for windows.)
624    
625       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
626         which caused BinIO.inputAll to fail consistently.
627    
628    .bat scripts:
629    
630       Windows .bat scripts assume that SMLNJ_HOME is defined.
631    
632       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
633         applications (sml, ml-yacc, ml-lex).
634       - ml-build.bat: analogous to ml-build.
635       - config\install.bat:  Analogous to config/install.sh.  This requires
636         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
637         (nmake etc. must be on the path, and vcvars32 must have been run.)
638         Moreover, sources for ml-lex and ml-yacc need to exist under src,
639         and the bootfile hierarchy must have been unpacked under
640         sml.boot.x86-win32.
641         The script is very primitive and does a poor job at error checking.
642         It only installs the base system, ml-lex, and ml-yacc.  No other
643         libraries are being installed (i.e., you get only those that
644         are part of the compiler.)
645       - link-sml.bat:  analogous to .link-sml, but not currently used
646    
647    Unrelated bug fixes:
648    
649      - ml-nlffigen now exports structures ST_* corresponding to incomplete
650        types.
651      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
652        otherwise.)
653    
654    ----------------------------------------------------------------------
655    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
656    Date: 2003/06/17
657    Tag: macqueen-20030617-bug895
658    Description:
659    
660    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
661    Tag will be used for new development branch (mcz-branch) for
662    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
663    
664    ----------------------------------------------------------------------
665    Name: Matthias Blume (blume (at) tti - c (dot) org)
666    Date: 2003/05/27 16:55:00 CDT
667    Tag: blume-20030527-polyeq
668    Description:
669    
670    Tried to eliminated most cases of polymorphic equality.
671    
672    ----------------------------------------------------------------------
673    Name: Matthias Blume (blume (at) tti - c (dot) org)
674    Date: 2003/05/21 17:45:00 CDT
675    Tag: blume-20030517-complete
676    Description:
677    
678    Two changes:
679    
680      1. Added a flag for controlling whether non-exhaustive bindings will
681         be treated as errors (default is false).
682      2. Cleaned up the *entire* source tree so that CMB.make goes through
683         without a single non-exhaustive match- or bind warning.
684    
685    ----------------------------------------------------------------------
686    Name: Matthias Blume (blume (at) tti - c (dot) org)
687    Date: 2003/05/17 10:20:00 CDT
688    Tag: blume-20030517-absyn
689    Description:
690    
691    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
692    
693       This mainly affects the quality of error messages.  However, some
694       of the code is now more straightforward than before. (Treatment of
695       the above four constructs in translate.sml is much simpler than
696       the "macro-expansion" that was going on before.  Plus, the mach-
697       compiler no longer gets invoked just to be able to compile an
698       if-expression.)
699    
700    2. The ErrorMsg.Error exception is now caught and absorbed by the
701       interactive loop.
702    
703    ----------------------------------------------------------------------
704    Name: Allen Leung
705    Date: 2003/05/16 13:05:00 CDT
706    Tag: leunga-20030516-cygwin-runtime
707    Description:
708    
709        Ported the runtime system to cygwin, which uses the unix
710    x86-unix bin files.  Missing/buggy features:
711    
712       o getnetbyname, getnetbyaddr: these functions seem to be missing in
713         the Cygwin library.
714       o Ctrl-C handling may be flaky.
715       o Windows system calls and Windows I/O are not supported.
716    
717       A new set of binfiles is located at:
718    
719         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
720    
721       This is only needed for bootstrapping the cygwin version of smlnj.
722       Other x86 versions can use the existing binfiles.
723    
724    ----------------------------------------------------------------------
725    Name: Matthias Blume
726    Date: 2003/04/08 15:42:00 CDT
727    Tag: blume-20030408-listpair
728    Description:
729    
730    1. Added a target 'mlrisc' to installer.
731    
732    2. Added missing elements to structure ListPair.
733    
734    ----------------------------------------------------------------------
735    Name: Allen Leung
736    Date: 2003/01/07 10:40:00 EST
737    Tag: leunga-20030107-int-rem
738    Description:
739    
740    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
741    The arguments to the SUBL instruction were swapped.
742    
743    ----------------------------------------------------------------------
744    Name: Matthias Blume
745    Date: 2002/12/12 16:25:00 EST
746    Tag: blume-20021212-risc-ra
747    Description:
748    
749    Fixed a serious bug in the rewrite code for FP spilling/reloading that
750    sent the RA into an infinite loop when floating point registers get
751    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
752    110.37 and 110.38.)
753    There was another set of potential problems related to the handling of
754    MLRISC annotations (but those did not yet cause real problems, apparently).
755    
756    ----------------------------------------------------------------------
757    Name: Matthias Blume
758    Date: 2002/12/06 22:40:00 EST
759    Tag: blume-20021206-cm-fileid
760    Description:
761    
762    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
763    This fixes the problem of CM getting confused by files that suddenly
764    change their identity (e.g., by getting unlinked and recreated by some
765    text editor such as vi).  There might be a better/cheaper/cleaner way
766    of doing this, but for now this will have to do.
767    
768    ----------------------------------------------------------------------
769    Name: Matthias Blume
770    Date: 2002/10/28 09:50:00 EST
771    Tag: blume-20021028-typecheck
772    Description:
773    
774    Exported structure Typecheck from $smlnj/viscomp/core.cm.
775    
776    ----------------------------------------------------------------------
777    Name: Matthias Blume
778    Date: 2002/10/17 09:10:00 EDT
779    Tag: Release_110_42
780    Description:
781    
782    In good old tradition, there has been a slight hiccup so that we have
783    to patch 110.42 after the fact.   The old release tag has been replaced
784    (see below).
785    
786    The change solves a problem with two competing approaches the
787    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
788    each other's way.
789    
790    This change only affects the runtime system code and the installer script.
791    (No new bootfiles.)
792    
793    ----------------------------------------------------------------------
794    Name: Matthias Blume
795    Date: 2002/10/16 12:00:00 EDT
796    Tag: Release_110_42_removed
797    Description:
798    
799    New working release.  New bootfiles.
800    
801    ----------------------------------------------------------------------
802    Name: Matthias Blume
803    Date: 2002/10/10 13:10:00 EDT
804    Tag: blume-20021010-ppc-divs
805    Description:
806    
807    The mltree operator DIVS must be implemented with an overflow check on
808    the PPC because the hardware indicates divide-by-zero using "overflow" as
809    well.
810    
811    ----------------------------------------------------------------------
812    Name: Matthias Blume
813    Date: 2002/07/23 11:45:00
814    Tag: blume-20020723-smlnj-home
815    Description:
816    
817    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
818    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
819    CM_PATHCONFIG is also set), the path configuration file is assumed
820    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
821    the entire tree to some other place and everything will "just work".
822    
823    (Companion commands such as ml-build and ml-makedepend also sense this
824    variable.)
825    
826    ----------------------------------------------------------------------
827    Name: Matthias Blume
828    Date: 2002/07/12 21:19:00 EDT
829    Tag: blume-20020712-liveness
830    Description:
831    
832    Exported two useful "step" functions from liveness module (MLRISC).
833    
834    ----------------------------------------------------------------------
835    Name: Matthias Blume
836    Date: 2002/07/05 16:00 EDT
837    Tag: Release_110_41
838    Description:
839    
840    New working release.  New bootfiles.
841    
842    ----------------------------------------------------------------------
843    Name: Matthias Blume
844    Date: 2002/07/05 10:25:00 EDT
845    Tag: blume-20020705-btimp
846    Description:
847    
848    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
849    other clients can set up backtracing support.
850    
851    ----------------------------------------------------------------------
852    Name: Matthias Blume
853    Date: 2002/06/25 17:23:00 EDT
854    Tag: blume-20020625-fpmax
855    Description:
856    
857    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
858    case.  (The sense of the isNaN test was reversed -- which made min and
859    max always return their first argument.)
860    
861    ----------------------------------------------------------------------
862    Name: Matthias Blume
863    Date: 2002/06/11
864    Tag: blume-20020611-unixpath
865    Description:
866    
867    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
868    
869    ----------------------------------------------------------------------
870    Name: Matthias Blume
871    Date: 2002/06/10 16:35:00 EDT
872    Tag: blume-20020610-ieeereal
873    Description:
874    
875    I back-ported my implementation of IEEEReal.fromString from the
876    idlbasis-devel branch so that we can test it.
877    
878    Another small change is that ppDec tries to give more information
879    than just "<sig>" in the case of functors.  However, this code is
880    broken in some mysterious way if the functor's body's signature
881    has not been declared by ascription but gets inferred from the
882    implementation.  This needs fixing...
883    
884    ----------------------------------------------------------------------
885    Name: Matthias Blume
886    Date: 2002/05/31
887    Tag: blume-20020531-btrace-mode
888    Description:
889    
890    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
891    the wayside when I switched over to using Controls everywhere.)
892    
893    ----------------------------------------------------------------------
894    Name: Lal George
895    Date: 2002/05/23 12:21:40 EDT
896    Tag: george-20020523-visual-labels
897    Description:
898    
899    Labels are now displayed in the graphical output to make
900    the fall-through and target blocks obvious.
901    
902    ----------------------------------------------------------------------
903    Name: Matthias Blume
904    Date: 2002/05/22 11:03:00 EDT
905    Tag: blume-20020522-shrink
906    Description:
907    
908    John tweaked yesterday's fix for 1131 to handle an out-of-memory
909    situation that comes up when allocating huge arrays.
910    
911    ----------------------------------------------------------------------
912    Name: Matthias Blume
913    Date: 2002/05/21 16:00:00 EDT
914    Tag: Release_110_40
915    Description:
916    
917    New working release (110.40).  New bootfiles.
918    
919    [Also: John Reppy fixed GC bug 1131.]
920    
921    ----------------------------------------------------------------------
922    Name: Matthias Blume
923    Date: 2002/05/21 12:35:00 EDT
924    Tag: blume-20020521-cmdoc
925    Description:
926    
927    CM documentation update.
928    
929    ----------------------------------------------------------------------
930    Name: Matthias Blume
931    Date: 2002/05/21 10:55:00 EDT
932    Tag: blume-20020521-misc
933    Description:
934    
935    - John tweaked runtime to be silent on heap export (except when
936      GC messages are on).
937    - I added a few more things (cross-compiling versions of CMB) to
938      config/preloads (as suggestions).
939    
940    ----------------------------------------------------------------------
941    Name: Matthias Blume
942    Date: 2002/05/20 22:25:00 EDT
943    Tag: blume-20020520-controls
944    Description:
945    
946    - Added ControlUtil structure to control-lib.cm.
947    - Use it throughout.
948    - Used Controls facility to define MLRISC controls (as opposed to
949      registering MLRISC control ref cells with Controls after the fact)
950    - Fixed messed-up controls priorities.
951    
952    * Removed again all the stuff from config/preloads that one wouldn't
953      be able to preload at the time the initial heap image is built.
954      (Many libraries, e.g., CML, do not exist yet at this time.  The
955       only libraries that can be preloaded via config/preloads are those
956       that come bundled with the bootfiles.)
957    
958    ----------------------------------------------------------------------
959    Name: Matthias Blume
960    Date: 2002/05/20 10:59:00 EDT
961    Tag: blume-20020520-preloads
962    Description:
963    
964    Added a lot of commented-out suggestions for things to be included
965    in config/preloads.
966    
967    ----------------------------------------------------------------------
968    Name: Allen Leung
969    Date: 2002/05/18 14:20:00 EDT
970    Tag: leunga-20020518-mdl
971    Description:
972    
973    o Made the mdl tool stuff compile and run again.
974    o I've disabled all the stuff that depends on RTL specifications; they
975      are all badly broken anyway.
976    
977    ----------------------------------------------------------------------
978    Name: Matthias Blume
979    Date: 2002/05/17 16:49:00 EDT
980    Tag: blume-20020517-controls
981    Description:
982    
983    0. John Reppy made several modifications to the SML/NJ library.
984       In particular, there is a shiny new controls-lib.cm.
985    
986    1. Pushed new controls interface through compiler so that everything
987       compiles again.
988    
989    2. Added FormatComb and FORMAT_COMB to the CML version of the
990       SML/NJ library (so that CML compiles again).
991    
992    3. Modified init scripts because XXX_DEFAULT environment variables
993       are no longer with us.  (Boot-time initialization is now done
994       using the same environment variables that are also used for
995       startup-time initialization of controls.)
996    
997    ----------------------------------------------------------------------
998    Name: Lal George
999    Date: 2002/05/15 09:20:10 EDT
1000    Tag: george-20020515-pseudo-op-decls
1001    Description:
1002    
1003            All pseudo-ops emitted before the first segment declaration
1004    such as TEXT, DATA, and BSS directives are assumed to be global
1005    declarations and are emitted first in the assembly file. This is
1006    useful in a number of situations where one has pseudo-ops that are not
1007    specific to any segment, and also works around the constraint that one
1008    cannot have client pseudo-ops in the TEXT segment.
1009    
1010            Because no segment is associated with these declarations it is
1011    an error to allocate any space or objects before the first segment
1012    directive and an exception will be raised. However, we cannot make
1013    this check for client pseudo-ops.
1014    
1015            These top level declarations are a field in the CFG graph_info.
1016    In theory you can continue to add to this field after the CFG has been
1017    built -- provided you know what you are doing;-)
1018    
1019    ----------------------------------------------------------------------
1020    Name: Matthias Blume
1021    Date: 2002/05/13 16:40:00 EDT
1022    Tag: blume-20020513-pp-etc
1023    Description:
1024    
1025    A few minor bugfixes:
1026    
1027      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
1028        (Bogus printouts for redefined bindings still occur.  Compiler
1029        bug should no longer occur now.  We need to redo the prettyprinter
1030        from scratch.)
1031    
1032      - CM pathname printer now also adds escape sequences for ( and )
1033    
1034      - commend and docu fixes for ml-nlffi
1035    
1036    ----------------------------------------------------------------------
1037    Name: Matthias Blume
1038    Date: 2002/05/10 16:40:00 EDT
1039    Tag: blume-20020510-erg-textio
1040    Description:
1041    
1042    Applied the following bugfix provided by Emden Gansner:
1043    
1044        Output is corrupted when outputSubstr is used rather than output.
1045    
1046        The problem occurs when a substring
1047    
1048            ss = (s, dataStart, dataLen)
1049    
1050        where dataStart > 0, fills a stream buffer with avail bytes left.
1051        avail bytes of s, starting at index dataStart, are copied into the
1052        buffer, the buffer is flushed, and then the remaining dataLen-avail
1053        bytes of ss are copied into the beginning of the buffer. Instead of
1054        starting this copy at index dataStart+avail in s, the current code
1055        starts the copy at index avail.
1056    
1057        Fix:
1058        In text-io-fn.sml, change line 695 from
1059             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
1060        to
1061             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
1062    
1063    ----------------------------------------------------------------------
1064    Name: Matthias Blume
1065    Date: 2002/04/12 13:55:00 EDT
1066    Tag: blume-20020412-assyntax
1067    Description:
1068    
1069    1. Grabbed newer assyntax.h from the XFree86 project.
1070    2. Fiddled with how to compile X86.prim.asm without warnings.
1071    3. (Very) Minor cleanup in CM.
1072    
1073    ----------------------------------------------------------------------
1074    Name: Matthias Blume
1075    Date: 2002/04/01 (no joke!) 17:07:00 EST
1076    Tag: blume-20020401-x86div
1077    Description:
1078    
1079    Added full support for div/mod/rem/quot on the x86, using the machine
1080    instruction's two results (without clumsily recomputing the remainder)
1081    directly where appropriate.
1082    
1083    Some more extensive power-of-two support was added to the x86 instruction
1084    selector (avoiding expensive divs, mods, and muls where they can be
1085    replaced with cheaper shifts and masks).  However, this sort of thing
1086    ought to be done earlier, e.g., within the CPS optimizer so that
1087    all architectures benefit from it.
1088    
1089    The compiler compiles to a fixed point, but changes might be somewhat
1090    fragile nevertheless.  Please, report any strange things that you might
1091    see wrt. div/mod/quot/rem...
1092    
1093    ----------------------------------------------------------------------
1094    Name: Matthias Blume
1095    Date: 2002/03/29 17:22:00
1096    Tag: blume-20020329-div
1097    Description:
1098    
1099    Fixed my broken div/mod logic.  Unfortunately, this means that the
1100    inline code for div/mod now has one more comparison than before.
1101    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1102    The problem was with quotient = 0, because that alone does not tell
1103    us which way the rounding went.  One then has to look at whether
1104    remainder and divisor have the same sign...  :(
1105    
1106    Anyway, I replaced the bootfiles with fresh ones...
1107    
1108    ----------------------------------------------------------------------
1109    Name: Matthias Blume
1110    Date: 2002/03/29 14:10:00 EST
1111    Tag: blume-20020329-inlprims
1112    Description:
1113    
1114    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
1115    
1116    Primops have changed. This means that the bin/boot-file formats have
1117    changed as well.
1118    
1119    To make sure that there is no confusion, I made a new version.
1120    
1121    
1122    CHANGES:
1123    
1124    * removed REMT from mltree (remainder should never overflow).
1125    
1126    * added primops to deal with divisions of all flavors to the frontend
1127    
1128    * handled these primops all the way through so they map to their respective
1129      MLRISC support
1130    
1131    * used these primops in the implementation of Int, Int32, Word, Word32
1132    
1133    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1134    
1135    * parameterized INLMIN, INLMAX, and INLABS by a numkind
1136    
1137    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1138      floating point
1139    
1140    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1141      and Real (but Real.abs maps to a separate floating-point-only primop)
1142    
1143    
1144    TODO items:
1145    
1146    * Hacked Alpha32 instruction selection, disabling the selection of REMx
1147      instructions because the machine instruction encoder cannot handle
1148      them.  (Hppa, PPC, and Sparc instruction selection did not handle
1149      REM in the first place, and REM is supported by the x86 machine coder.)
1150    
1151    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1152      selection phase.  (The two can be streamlined because the hardware
1153      delivers both quotient and remainder at the same time anyway.)
1154    
1155    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1156      (Currently the behavior is inconsistent both across architectures and
1157      wrt. the draft Basis spec.)
1158    
1159    * Word8 should eventually be handled natively, too.
1160    
1161    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
1162      as if there currently is no execution path that could trigger it in
1163      SML/NJ.  (The assumptions underlying functions arith and promotable do not
1164      hold for things like multiplication and division.)
1165    
1166    ----------------------------------------------------------------------
1167    Name: Matthias Blume
1168    Date: 2002/03/27 16:27:00 EST
1169    Tag: blume-20020327-mlrisc-divisions
1170    Description:
1171    
1172    Added support for all four division operations (ML's div, mod, quot,
1173    and rem) to MLRISC.  In the course of doing so, I also rationalized
1174    the naming (no more annoying switch-around of DIV and QUOT), by
1175    parameterizing the operation by div_rounding_mode (which can be either
1176    DIV_TO_ZERO or DIV_TO_NEGINF).
1177    
1178    The generic MLTreeGen functor takes care of compiling all four
1179    operations down to only round-to-zero div.
1180    
1181    Missing pieces:
1182    
1183      * Doing something smarter than relying on MLTreeGen on architectures
1184        like, e.g., the x86 where hardware division delivers both quotient and
1185        remainder at the same time.  With this, the implementation of the
1186        round-to-neginf operations could be further streamlined.
1187    
1188      * Remove inlining support for div/mod/rem from the frontend and replace it
1189        with primops that get carried through to the backend.  Do this for all
1190        int and word types.
1191    
1192    ----------------------------------------------------------------------
1193    Name: Matthias Blume
1194    Date: 2002/03/25 17:25:00 EST
1195    Tag: blume-20020325-divmod
1196    Description:
1197    
1198    I improved (hopefully without breaking them) the implementation of Int.div,
1199    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1200    advantage of the following observations:
1201    
1202      Let  q = x quot y      r = x rem y
1203           d = x div  y      m = x mod y
1204    
1205    where "quot" is the round-to-zero version of integer division that
1206    hardware usually provides.  Then we have:
1207    
1208         r = x - q * y        where neither the * nor the - will overflow
1209         d = if q >= 0 orelse x = q * y then q else q - 1
1210                              where neither the * nor the - will overflow
1211         m = if q >= 0 orelse r = 0 then r else r + y
1212                              where the + will not overflow
1213    
1214    This results in substantial simplification of the generated code.
1215    The following table shows the number of CFG nodes and edges generated
1216    for
1217            fun f (x, y) = x OPER y
1218            (* with OPER \in div, mod, quot, rem *)
1219    
1220    
1221        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1222        --------------------------------------------------------
1223         div |         24 |         39 |         12 |         16
1224         mod |         41 |         71 |         12 |         16
1225        quot |          8 |         10 |          8 |         10
1226         rem |         10 |         14 |          8 |         10
1227    
1228    
1229    ----------------------------------------------------------------------
1230    Name: Matthias Blume
1231    Date: 2002/03/25 22:06:00 EST
1232    Tag: blume-20020325-cprotobug
1233    Description:
1234    
1235    Fixed a bug in cproto (c prototype decoder).
1236    
1237    ----------------------------------------------------------------------
1238    Name: Matthias Blume
1239    Date: 2002/03/25 16:00:00 EST
1240    Tag: blume-20020325-raw-primops
1241    Description:
1242    
1243    I did some cleanup to Allen's new primop code and
1244    replaced yesterday's bootfiles with new ones.
1245    (But they are stored in the same place.)
1246    
1247    ----------------------------------------------------------------------
1248    Name: Matthias Blume
1249    Date: 2002/03/24 22:40:00 EST
1250    Tag: blume-20020324-bootfiles
1251    Description:
1252    
1253    Made the bootfiles that Allen asked for.
1254    
1255    ----------------------------------------------------------------------
1256    Name: Allen Leung
1257    Date: 2002/03/23 15:50:00 EST
1258    Tag: leunga-20020323-flint-cps-rcc-primops
1259    Description:
1260    
1261      1. Changes to FLINT primops:
1262    
1263        (* make a call to a C-function;
1264         * The primop carries C function prototype information and specifies
1265         * which of its (ML-) arguments are floating point. C prototype
1266         * information is for use by the backend, ML information is for
1267         * use by the CPS converter. *)
1268      | RAW_CCALL of { c_proto: CTypes.c_proto,
1269                       ml_args: ccall_type list,
1270                       ml_res_opt: ccall_type option,
1271                       reentrant : bool
1272                     } option
1273       (* Allocate uninitialized storage on the heap.
1274        * The record is meant to hold short-lived C objects, i.e., they
1275        * are not ML pointers.  With the tag, the representation is
1276        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1277        *)
1278      | RAW_RECORD of {tag:bool,sz:int}
1279      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1280    
1281      2.  These CPS primops are now overloaded:
1282    
1283           rawload of {kind:numkind}
1284           rawstore of {kind:numkind}
1285    
1286          The one argument form is:
1287    
1288             rawload {kind} address
1289    
1290          The two argument form is:
1291    
1292             rawload {kind} [ml object, byte-offset]
1293    
1294      3. RAW_CCALL/RCC now takes two extra arguments:
1295    
1296         a. The first is whether the C call is reentrant, i.e., whether
1297            ML state should be saved and restored.
1298         b. The second argument is a string argument specifying the name of
1299            library and the C function.
1300    
1301         These things are currently not handled in the code generator, yet.
1302    
1303      4. In CProto,
1304    
1305         An encoding type of "bool" means "ml object" and is mapped into
1306         C prototype of PTR.  Note that "bool" is different than "string",
1307         even though "string" is also mapped into PTR, because "bool"
1308         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1309    
1310      5. Pickler/unpicker
1311    
1312         Changed to handle RAW_RECORD and newest RAW_CCALL
1313    
1314      6. MLRiscGen,
1315    
1316         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1317         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1318            in the file CodeGen/cpscompile/cps-c-calls.sml
1319    
1320      7. Added the conditional move operator
1321    
1322             condmove of branch
1323    
1324         to cps.  Generation of this is still buggy so it is currently
1325         disabled.
1326    
1327    ----------------------------------------------------------------------
1328    Name: Lal George
1329    Date: 2002/03/22 14:18:25 EST
1330    Tag: george-20020322-cps-branch-prob
1331    Description:
1332    
1333    Implemented the Ball-Larus branch prediction-heuristics, and
1334    incorporated graphical viewers for control flow graphs.
1335    
1336    Ball-Larus Heuristics:
1337    ---------------------
1338    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1339    
1340    By design it uses the Dempster-Shafer theory for combining
1341    probabilities.  For example, in the function:
1342    
1343        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1344    
1345    the ball-larus heuristics predicts that the n=0 is unlikely
1346    (OH-heuristic), and the 'then' branch is unlikely because of the
1347    RH-heuristic -- giving the 'then' branch an even lower combined
1348    probability using the Dempster-Shafer theory.
1349    
1350    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1351    probability of the 'then' branch because of the loop in the else
1352    branch.
1353    
1354    
1355    Graphical Viewing:
1356    ------------------
1357    I merely plugged in Allen's graphical viewers into the compiler. The
1358    additional code is not much. At the top level, saying:
1359    
1360            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1361    
1362    will display the graphical view of the control flow graph just before
1363    back-patching.  daVinci must be in your path for this to work. If
1364    daVinci is not available, then the default viewer can be changed
1365    using:
1366    
1367            Control.MLRISC.getString "viewer"
1368    
1369    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1370    course, these viewers must be in your path.
1371    
1372    The above will display the compilation unit at the level of clusters,
1373    many of which are small, boring, and un-interesting. Also setting:
1374    
1375            Control.MLRISC.getInt "cfg-graphical-view_size"
1376    
1377    will display clusters that are larger than the value set by the above.
1378    
1379    
1380    ----------------------------------------------------------------------
1381    Name: Matthias Blume
1382    Date: 2002/03/21 22:20:00 EST
1383    Tag: blume-20020321-kmp-bugfix
1384    Description:
1385    
1386    Changed the interface to the KMP routine in PreString and fixed
1387    a minor bug in one place where it was used.
1388    
1389    ----------------------------------------------------------------------
1390  Name: Allen Leung  Name: Allen Leung
1391  Date: 2002/03/21 20:30:00 EST  Date: 2002/03/21 20:30:00 EST
1392  Tag: leunga-20020321-cfg  Tag: leunga-20020321-cfg

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