Home My Page Projects Code Snippets Project Openings SML/NJ
Summary Activity Forums Tracker Lists Tasks Docs Surveys News SCM Files

SCM Repository

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

Diff of /sml/trunk/HISTORY

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1063, Wed Feb 13 21:41:53 2002 UTC revision 1455, Fri Feb 13 20:42:49 2004 UTC
# Line 13  Line 13 
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume (blume (at) tti - c (dot) org)
17    Date: 2004/02/13 14:50:00 CST
18    Tag: Release_110_45
19    Description:
20    
21    New working version (110.45). New bootfiles.
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume (blume (at) tti - c (dot) org)
25    Date: 2004/01/26 15:15:15 CST
26    Tag: blume-20040126-toplevel
27    Description:
28    
29    Improved handling of exceptions at the interactive toplevel.
30    
31    ----------------------------------------------------------------------
32    Name: Matthias Blume (blume (at) tti - c (dot) org)
33    Date: 2004/01/26 11:25:00
34    Tag: blume-20040126-app
35    Description:
36    
37    Type of top-level "app" corrected.
38    Added code for setting vp_limitPtrMask to Win32-specific runtime.
39    
40    ----------------------------------------------------------------------
41    Name: Matthias Blume (blume (at) tti - c (dot) org)
42    Date: 2003/11/18 17:10 CST
43    Tag: blume-20031118-basis-fiddle
44    Description:
45    
46    - changed Timer interface to what might become the spec
47    - POSIX_FLAGS -> BIT_FLAGS according to spec
48    - some other minor discrepancies wrt. spec eliminated
49    
50    ----------------------------------------------------------------------
51    Name: Matthias Blume (blume (at) tti - c (dot) org)
52    Date: 2003/11/06 12:00:00 CST
53    Tag: Release_110_44
54    Description:
55    
56    New working version (110.44). New bootfiles.
57    
58    ----------------------------------------------------------------------
59    Name: Matthias Blume (blume (at) tti - c (dot) org)
60    Date: 2003/11/04 11:50:00 CST
61    Tag: blume-20031104-move-libraries
62    Description:
63    
64    Eliminated the "dont_move_libraries" directive in config/targets.
65    (The mechanism was broken and could not be fixed easily.  Moreover,
66    there does not seem to be any reason not to move all libraries into
67    lib during installation.  I originally implemented this directive as a
68    backward-compatibility feature when I first introduced the new CM.
69    Now that things have been stable for a long time and going back to the
70    old CM is not an option, there is no reason to keep it around.)
71    
72    ----------------------------------------------------------------------
73    Name: Matthias Blume (blume (at) tti - c (dot) org)
74    Date: 2003/11/03 16:00:00 CST
75    Tag: blume-20031103-installdir
76    Description:
77    
78    Made installer honor INSTALLDIR variable again.  (Thanks to Chris
79    Richards for pointing out the problem and providing the solution.)
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume (blume (at) tti - c (dot) org)
83    Date: 2003/10/01 17:05:00 CDT
84    Tag: blume-20031001-lal-mlrisc
85    Description:
86    
87    MLRISC bug fix from Lal.
88    
89    ----------------------------------------------------------------------
90    Name: Matthias Blume (blume (at) tti - c (dot) org)
91    Date: 2003/09/30 16:10:00 CDT
92    Tag: blume-20030930-primio-bat
93    Description:
94    
95    1. Added openVector, nullRd, and nullWr to PRIM_IO.
96    2. Improved .bat files (for Win32 port) to make things work under Win95.
97       (thanks to Aaron S. Hawley for this one)
98    
99    ----------------------------------------------------------------------
100    Name: Matthias Blume (blume (at) tti - c (dot) org)
101    Date: 2003/09/26 16:05:00 CDT
102    Tag: blume-20030926-wrappriv
103    Description:
104    
105    Added missing wrapper for privilege "primitive" in $smlnj/viscomp/core.cm.
106    
107    ----------------------------------------------------------------------
108    Name: Matthias Blume (blume (at) tti - c (dot) org)
109    Date: 2003/09/26 15:00:00 CDT
110    Tag: blume-20030926-110_43_3
111    Description:
112    
113    - additional cleanup
114    - version number bump, NEW BOOTFILES
115    
116    ----------------------------------------------------------------------
117    Name: Matthias Blume (blume (at) tti - c (dot) org)
118    Date: 2003/09/26 12:00:00 CDT
119    Tag: blume-20030926-ppautoload
120    Description:
121    
122    I modified the read-eval-print loop so that the autoloader gets
123    invoked whenever the prettyprinter tries to look up a symbol that
124    is not currently defined in the toplevel environment but which
125    appears in CM's autoload registry.  As a result, we see far fewer of
126    those ?.Foo.Bar.xxx names in the prettyprinter's output.
127    
128    In addition to this I tried to clean up some pieces of the Basis
129    implementation (e.g., Socket, Word8Array) in order to prevent other
130    instances of these ?.Foo.Bar.xxx names from being printed.
131    
132    The mechanism that picks names for types still needs some work, though.
133    (Right now it seems that if there is a type A.t which is defined to
134    be B.u, but B is unavailable at toplevel, then A.t gets printed as
135    "?.B.u" although the perhaps more sensible solution would be to use
136    "A.t" in this case.  In other words, the prettyprinter should follow
137    a chain of DEFtycs not farther than there are corresponding toplevel
138    names in the current environment.)
139    
140    ----------------------------------------------------------------------
141    Name: Matthias Blume (blume (at) tti - c (dot) org)
142    Date: 2003/09/24 16:31:00 CDT
143    Tag: blume-20030924-installer
144    Description:
145    
146    Another installer tweak:  All the ML code for the installer is now
147    compiled during CMB.make and put into a little library called
148    $smlnj/installer.cm.  The installation then simply invokes
149    
150       sml -m $smlnj/installer.cm
151    
152    and everything happens automagically.
153    
154    Win32:  ML code senses value of environment variable SMLNJ_HOME.
155    Unix:   ML code senses values of environment variables ROOT, CONFIGDIR,
156            and BINDIR.
157    
158    The new scheme guarantees that the ML code responsible for the installation
159    is in sync with the APIs of the main system.  Also, the installer is
160    somewhat faster because the installer script is precompiled.
161    
162    ----------------------------------------------------------------------
163    Name: Matthias Blume (blume (at) tti - c (dot) org)
164    Date: 2003/09/24 15:35:00 CDT
165    Tag: blume-20030924-synsock
166    Description:
167    
168    Added a signature SYNCHRONOUS_SOCKET to basis.cm.  This is like SOCKET
169    but excludes all non-blocking operations.  Defined SOCKET (in Basis)
170    and CML_SOCKET in terms of SYNCHRONOUS_SOCKET.  Removed superfluous
171    implementations of non-blocking operations from CML's Socket
172    structure.
173    
174    ----------------------------------------------------------------------
175    Name: Matthias Blume (blume (at) tti - c (dot) org)
176    Date: 2003/09/24 15:10:05 CDT
177    Tag: blume-20030924-sockets
178    Description:
179    
180    1. Fixed SOCKET API and implementation to match Basis spec.
181       This required changing the internal representation of sockets to one
182       that remembers (for each socket file descriptor) whether it is currently
183       blocking or non-blocking.  This state is maintained lazily (i.e., a system
184       call is made only if the state actually needs to change).
185    
186    2. OS-specific details of sockets were moved into separate files, thus
187       making it possible to unify the bulk of the socket implementations
188       between Unix and Win32.
189    
190    3. CML's socket API changed accordingly.
191       (Note that we need to remove non-blocking functions from this API
192       since they are redundant in the case of CML!)
193    
194    4. CML's socket implementation now makes use of non-blocking functions
195       provided by Basis, thus removing all OS-dependent code from this part
196       of CML.
197    
198    5. Changed Real64.precision from 52 to 53.  Minor cleanup in Real64 code.
199    
200    ----------------------------------------------------------------------
201    Name: Matthias Blume (blume (at) tti - c (dot) org)
202    Date: 2003/09/22 12:10:00 CDT
203    Tag: blume-20030922-110_43_2
204    Description:
205    
206    Made a new interim version and bootfiles for developer's bootstrapping
207    convenience.
208    
209       110.43.2 -- NEW BOOTFILES
210    
211    ----------------------------------------------------------------------
212    Name: Matthias Blume (blume (at) tti - c (dot) org)
213    Date: 2003/09/19 15:55:00 CDT
214    Tag: blume-20030919-cmdir
215    Description:
216    
217    1. new-install.sh -> install.sh
218    2. changed default CM "metadata" directory name to ".cm" (instead of "CM")
219    3. tweaked installer so that another name instead of .cm can be chosen
220       at install time (by setting the CM_DIR_ARC environment variable
221       during installation); once installation is complete, the name is
222       fixed
223    
224    ----------------------------------------------------------------------
225    Name: Matthias Blume (blume (at) tti - c (dot) org)
226    Date: 2003/09/18 16:00:00 CDT
227    Tag: blume-20030918-110_43_1
228    Description:
229    
230    Made a new interim version and bootfiles for developer's bootstrapping
231    convenience.
232    
233       110.43.1 -- NEW BOOTFILES
234    
235    ----------------------------------------------------------------------
236    Name: Matthias Blume (blume (at) tti - c (dot) org)
237    Date: 2003/09/18 15:20:00 CDT
238    Tag: blume-20030918-misc
239    Description:
240    
241    1. Exported fractionsPerSecond etc. from TimeImp (but not from Time as
242       this seems to be controversial at the moment) and used those in
243       Posix.ProcEnv.times.
244    
245    2. Added Time.{from,to}Nanoseconds to Time.
246    
247    3. Improved Real.{from,to}LargeInt by avoiding needless calculations.
248       For example, fromLargeInt never needs to look at more than 3 "big
249       digits" to get its 53 bits of precision.
250    
251    ----------------------------------------------------------------------
252    Name: Matthias Blume (blume (at) tti - c (dot) org)
253    Date: 2003/09/17 16:30:00 CDT
254    Tag: blume-20030917-real32-slices
255    Description:
256    
257    Added an entry to the primitive environment
258    (compiler/Semant/statenv/prim.sml) for int32->real64 conversion and
259    added code to compiler/CodeGen/main/mlriscGen.sml to implement it.
260    
261    Removed some of the "magic" constants in real64.sml and replaced them
262    with code that generates these values from their corresponding
263    integer counterparts.
264    
265    Made all(?) the slice-related changes to the Basis and made everything
266    compile again...
267    
268    ----------------------------------------------------------------------
269    Name: Matthias Blume (blume (at) tti - c (dot) org)
270    Date: 2003/09/15 17:45:00 CDT
271    Tag: blume-20030915-rbase
272    Description:
273    
274    Fixed bug in Real.fromLargeInt.
275    
276    ----------------------------------------------------------------------
277    Name: Matthias Blume (blume (at) tti - c (dot) org)
278    Date: 2003/09/13 18:11:00 CDT
279    Tag: blume-20030913-libinstall
280    Description:
281    
282    Minor bugfix in config/libinstall (set anchor with path to
283    standalone tool after installing it, otherwise libraries that
284    need ml-lex or ml-yacc won't compile the first time the installer
285    runs).
286    
287    ----------------------------------------------------------------------
288    Name: Matthias Blume (blume (at) tti - c (dot) org)
289    Date: 2003/09/12 11:45:00 CDT
290    Tag: blume-20030912-various
291    Description:
292    
293     - fixed bug in Real.toLargeInt
294     - fixed bug in Posix.ProcEnv.times
295     - changed inputLine functions to return an option
296     - minor installer improvements / bugfixes
297     - changed default @SMLalloc parameter for x86/celeron to 64k
298    
299    ----------------------------------------------------------------------
300    Name: Matthias Blume (blume (at) tti - c (dot) org)
301    Date: 2003/09/09 22:00:00 CDT
302    Tag: Release_110_43
303    Description:
304    
305        New working release 110.43.  New bootfiles.
306    
307    ----------------------------------------------------------------------
308    Name: Matthias Blume (blume (at) tti - c (dot) org)
309    Date: 2003/09/09 19:20:00 CDT
310    Tag: blume-20030909-installer
311    Description:
312    
313    Rewrote large parts of config/install.sh in SML (config/libinstall.sml).
314    Modified config/install.bat to take advantage of it.  Also modified
315    config/install.sh (and called it config/new-install.sh) to take advantage
316    of it on Unix systems.  (The SML code is (supposed to be) platform-
317    independent.)
318    
319    The installer can now install everything under Win32
320    as well as under *nix as long as it compiles.
321    
322    Other changes:
323    
324      - made CML compile again under Win32
325      - made eXene compile under Win32 (by providing a fake structure UnixSock
326        and by using OS.Process.getEnv instead of Posix.ProcEnv.getenv)
327      - fixed a bug in nowhere: it assumed that type OS.Process.status is the
328        same as type int;  under Win32 it isn't
329      - fixed some slice-related problems in the win32-specific parts of CML
330      - added a functor argument "sameVol" to os-path-fn.sml in the Basis
331        (under Win32, the volume name is case-insensitive, and the
332        OS.Path code compares volume names for equality)
333    
334    ----------------------------------------------------------------------
335    Name: Matthias Blume (blume (at) tti - c (dot) org)
336    Date: 2003/09/08 11:55:00 CDT
337    Tag: blume-20030908-fullpath
338    Description:
339    
340    Made Win32 version of OS.FileSys.fullPath return current directory
341    when given an empty string.  This is what the spec says, and incidentally,
342    CM depends on it.  (CM otherwise goes into an infinite loop in certain
343    cases when presented with the name of a non-existing .cm file.)
344    
345    ----------------------------------------------------------------------
346    Name: Matthias Blume (blume (at) tti - c (dot) org)
347    Date: 2003/09/04 16:30:00 CDT
348    Tag: blume-20030905-slices-etc
349    Description:
350    
351      1. Changed interface to vectors and arrays in Basis to match
352         (draft) Basis spec.
353      2. Added signatures and implementations of slices according to
354         Basis spec.
355      3. Edited source code throughout the system to make it compile again
356         under 1. and 2.  (In some cases code had to be added to have it
357         match the new signatures.)
358      4. MLRISC should be backward-compatible: the copies of the originals
359         of files that needed to change under 3. were retained, the .cm files
360         check the compiler version number and use old versions when
361         appropriate.
362      5. Changed type of OS.FileSys.readDir and Posix.FileSys.readdir to
363         dirstream -> string option (in accordance with Basis spec).
364      6. When generating code that counts lines, ml-lex used function
365         CharVector.foldli, taking advantage of its old interface.
366         This has been replaced with the corresponding code from
367         CharVectorSlice.  (html-lex must be re-lexed!)
368      7. BitArray in smlnj-lib/Util has been extended/modified to match the
369         new MONO_ARRAY signature.  (Do we need BitArraySlice?)
370      8. Removed temporary additions (fromInternal, toInternal) from the
371         (now obsolete) IntInf in smlnj-lib/Util.
372      9. Cleaned up structure Byte.
373     10. Added localOffset, scan, and fromString to Date (according to spec).
374         Cleaned/corrected implementation of Date.
375         (Still need to check for correctness; implement better canonicalizeDate.)
376     11. Added "scan" to signature IEEE_REAL.
377     12. Some improvements to IntInf [in particular: efficiency-hack for
378         mod and rem when second operand is 2 (for parity checks).]
379     13. Changed representation of type Time.time, using a single IntInf.int
380         value counting microseconds.  This considerably simplified the
381         implementation of structure Time.  We now support negative time
382         values; scan and fromString handle signs.
383     14. Functor PrimIO now takes two additional arguments (VectorSlice and
384         ArraySlice).
385    
386    ----------------------------------------------------------------------
387    Name: Matthias Blume (blume (at) tti - c (dot) org)
388    Date: 2003/08/28 17:00:00 CDT
389    Tag: blume-20030828-intinf
390    Description:
391    
392    This is a major update which comes with a version number bump
393    (110.42.99 -- yes, we are really close to 110.43 :-), NEW BOOTFILES,
394    and an implementation of IntInf in the Basis.
395    
396    There are a fairly large number of related changes and updates throughout
397    the system:
398    
399    Basis:
400            - Implemented IntInf.
401            - Made LargeInt a projection of IntInf (by filtering through INTEGER).
402            - Added some missing Real64 operations, most notably Real.toLargeInt.
403            - Added FixedInt as a synonym for Int32.
404    
405    compiler:
406            * Added support for a built-in intinf type.
407              - literals
408              - pattern matching
409              - conversion shortcuts (Int32.fromLarge o Int.toLarge etc.)
410              - overloading on literals and operations
411    
412            This required adding a primitive type intinf, some additional
413            primops, and implementations for several non-trivial intinf
414            operations in Core.  (The intinf type is completely abstract
415            to the compiler; all operations get delegated back to the Core.)
416    
417            * Intinf equality is handled by polyequal.  However, the compiler
418            does not print its usual warning in this case (since polyequal
419            is the right thing to do there).
420    
421            * Improved the organization of structure InlineT.
422    
423            * A word about conversion primops:
424            If conversions involving intinf do not cancel out during
425            CPS contract, then the compiler must insert calls to Core functions.
426            Since all core access must be resolved already during the FLINT
427            translate phase, it would be too late a the time of CPS contract
428            to add new Core calls.  For this reason, conversion primops
429            for intinf carry two arguments:  1. the numeric argument that
430            they are supposed to convert, and 2. the Core function that
431            can help with this conversion if necessary.  If CPS contract
432            eliminates a primop, then the associated Core function becomes
433            dead and goes away.  Intinf conversion primops that do not get
434            eliminated by CPS contract get rewritten into calls of their
435            core functions by a separate, new phase.
436    
437    interactive system:
438            - Control.Print.intinfDepth controls max length of intinf constants
439            being printed. (Analogous to Control.Print.stringDepth.)
440            - Cleanup in printutil and pputil: got rid of unused stuff and
441            duplicates; replaced some of the code with code that makes better
442            use of library functionality.
443    
444    CM:
445            Bugfix: parse-errors in init group (system/smlnj/init/init.cmi)
446            are no longer silent.
447    
448    CKIT:
449            Fixed mismatched uses of Int32 and LargeInt.  I always decided
450            in favor of LargeInt -- which is now the same as IntInf.
451            CKIT-knowledgable people should check whether this is what's
452            intended and otherwise change things back to using Int32 or
453            FixedInt.
454    
455    Throughout the code:
456            Started using IntInf.int literals and built-in operations
457            (e.g., comparison with 0) where this seems appropriate.
458    
459    
460    ----------------------------------------------------------------------
461    Name: Dave MacQueen (dbm@cs.uchicago.edu)
462    Date: 2003/08/13 11:36:00 CDT
463    Tag: dbm-20030813-mcz-merge1
464    Description:
465    
466    Merging changes from the mcz-branch development branch into trunk.
467    These changes involve replacement of the emulated old prettyprinter
468    interface with direct use of the SML/NJ Lib PP library, and fixing
469    of a couple of bugs (895, 1186) relating to error messages.  A new
470    prettyprinter for ast datatypes (Elaborator/print/ppast.{sig,sml})
471    has been added.
472    
473    ----------------------------------------------------------------------
474    Name: Matthias Blume (blume (at) tti - c (dot) org)
475    Date: 2003/08/11 15:45:00 CDT
476    Tag: blume-20030811-windows
477    Description:
478    
479    Version number bumped to 110.42.9.  NEW BOOTFILES!!!
480    
481        http://smlnj.cs.uchicago.edu/dist/working/110.42.9/
482    
483    This patch restores SML/NJ's ability to run under win32.  There are a
484    number of changes, including fixes for several bugs that had gone
485    unnoticed until now:
486    
487      - uname "CYGWIN_NT*" is recognized as win32 (This is relevant only when
488        trying to run the win32 version from within cygwin.)
489    
490      - There are a number of simple .bat scripts that substitute for their
491        corresponding Unix shell-scripts.  (See below.)
492    
493      - The internals of ml-build have been modified slightly.  The main
494        difference is that instead of calling ".link-sml" (or link-sml.bat)
495        using OS.Process.system, the ML process delegates this task back
496        to the script.  Otherwise problems arise in mixed environments such
497        as Cygwin where scripts look and work like Unix scripts, but
498        where OS.Process.system cannot run them.
499    
500      - In CM, the srcpath pickler used native pathname syntax -- which
501        is incorrect in the case of cross-compilation.  The new pickle format
502        is independent of platform-specific naming conventions.
503    
504      - Path configuration files (such as lib/pathconfig) can now choose
505        between native and standard syntax.  Placing a line of the form
506    
507            standard!
508    
509        into the file causes all subsequent paths to be interpreted using
510        CM standard pathname syntax (= Unix conventions); a line
511    
512            native!
513    
514        switches back to native style.  This was needed so that
515        path config files can be written portably, see src/system/pathconfig.
516    
517      - Runtime system:
518    
519          - win32-filesys.c:  get_file_time and set_file_time now
520            access modification time, not creation time.
521    
522          - I/O code made aware of new array representation.
523    
524          - Bug fixes in X86.prim.masm.
525    
526       - src/system/makeml made aware of win32. (For use under cygwin
527            and other Unix-environments for windows.)
528    
529       - In Basis, fixed off-by-one error in win32-io.sml (function vecF)
530         which caused BinIO.inputAll to fail consistently.
531    
532    .bat scripts:
533    
534       Windows .bat scripts assume that SMLNJ_HOME is defined.
535    
536       - sml.bat, ml-yacc.bat, ml-lex.bat:  Driver scripts for standalone
537         applications (sml, ml-yacc, ml-lex).
538       - ml-build.bat: analogous to ml-build.
539       - config\install.bat:  Analogous to config/install.sh.  This requires
540         that SMLNJ_HOME is set and that Microsoft Visual C is ready to use.
541         (nmake etc. must be on the path, and vcvars32 must have been run.)
542         Moreover, sources for ml-lex and ml-yacc need to exist under src,
543         and the bootfile hierarchy must have been unpacked under
544         sml.boot.x86-win32.
545         The script is very primitive and does a poor job at error checking.
546         It only installs the base system, ml-lex, and ml-yacc.  No other
547         libraries are being installed (i.e., you get only those that
548         are part of the compiler.)
549       - link-sml.bat:  analogous to .link-sml, but not currently used
550    
551    Unrelated bug fixes:
552    
553      - ml-nlffigen now exports structures ST_* corresponding to incomplete
554        types.
555      - Added getDevice to PP/src/pp-debug-fn.sml.  (Would not compile
556        otherwise.)
557    
558    ----------------------------------------------------------------------
559    Name: Dave MacQueen (macqueen@cs.uchicago.edu)
560    Date: 2003/06/17
561    Tag: macqueen-20030617-bug895
562    Description:
563    
564    Modified compiler/Elaborator/print/pptype.sml to fix bug 895.
565    Tag will be used for new development branch (mcz-branch) for
566    use by MacQueen, (Lucasz) Zairek, and (George) Cao at uchicago.
567    
568    ----------------------------------------------------------------------
569    Name: Matthias Blume (blume (at) tti - c (dot) org)
570    Date: 2003/05/27 16:55:00 CDT
571    Tag: blume-20030527-polyeq
572    Description:
573    
574    Tried to eliminated most cases of polymorphic equality.
575    
576    ----------------------------------------------------------------------
577    Name: Matthias Blume (blume (at) tti - c (dot) org)
578    Date: 2003/05/21 17:45:00 CDT
579    Tag: blume-20030517-complete
580    Description:
581    
582    Two changes:
583    
584      1. Added a flag for controlling whether non-exhaustive bindings will
585         be treated as errors (default is false).
586      2. Cleaned up the *entire* source tree so that CMB.make goes through
587         without a single non-exhaustive match- or bind warning.
588    
589    ----------------------------------------------------------------------
590    Name: Matthias Blume (blume (at) tti - c (dot) org)
591    Date: 2003/05/17 10:20:00 CDT
592    Tag: blume-20030517-absyn
593    Description:
594    
595    1. Added cases for IF, WHILE, ANDALSO, and ORELSE to Absyn.
596    
597       This mainly affects the quality of error messages.  However, some
598       of the code is now more straightforward than before. (Treatment of
599       the above four constructs in translate.sml is much simpler than
600       the "macro-expansion" that was going on before.  Plus, the mach-
601       compiler no longer gets invoked just to be able to compile an
602       if-expression.)
603    
604    2. The ErrorMsg.Error exception is now caught and absorbed by the
605       interactive loop.
606    
607    ----------------------------------------------------------------------
608    Name: Allen Leung
609    Date: 2003/05/16 13:05:00 CDT
610    Tag: leunga-20030516-cygwin-runtime
611    Description:
612    
613        Ported the runtime system to cygwin, which uses the unix
614    x86-unix bin files.  Missing/buggy features:
615    
616       o getnetbyname, getnetbyaddr: these functions seem to be missing in
617         the Cygwin library.
618       o Ctrl-C handling may be flaky.
619       o Windows system calls and Windows I/O are not supported.
620    
621       A new set of binfiles is located at:
622    
623         http://www.dorsai.org/~leunga/boot.x86-unix.tgz
624    
625       This is only needed for bootstrapping the cygwin version of smlnj.
626       Other x86 versions can use the existing binfiles.
627    
628    ----------------------------------------------------------------------
629    Name: Matthias Blume
630    Date: 2003/04/08 15:42:00 CDT
631    Tag: blume-20030408-listpair
632    Description:
633    
634    1. Added a target 'mlrisc' to installer.
635    
636    2. Added missing elements to structure ListPair.
637    
638    ----------------------------------------------------------------------
639    Name: Allen Leung
640    Date: 2003/01/07 10:40:00 EST
641    Tag: leunga-20030107-int-rem
642    Description:
643    
644    Fixed a bug in Int.rem(x,y) where y is a power of 2 on x86.
645    The arguments to the SUBL instruction were swapped.
646    
647    ----------------------------------------------------------------------
648    Name: Matthias Blume
649    Date: 2002/12/12 16:25:00 EST
650    Tag: blume-20021212-risc-ra
651    Description:
652    
653    Fixed a serious bug in the rewrite code for FP spilling/reloading that
654    sent the RA into an infinite loop when floating point registers get
655    spilled.  (Because of this bug, e.g., nucleic stopped compiling between
656    110.37 and 110.38.)
657    There was another set of potential problems related to the handling of
658    MLRISC annotations (but those did not yet cause real problems, apparently).
659    
660    ----------------------------------------------------------------------
661    Name: Matthias Blume
662    Date: 2002/12/06 22:40:00 EST
663    Tag: blume-20021206-cm-fileid
664    Description:
665    
666    Added a call of SrcPath.sync at the beginning of Parse.parse (in CM).
667    This fixes the problem of CM getting confused by files that suddenly
668    change their identity (e.g., by getting unlinked and recreated by some
669    text editor such as vi).  There might be a better/cheaper/cleaner way
670    of doing this, but for now this will have to do.
671    
672    ----------------------------------------------------------------------
673    Name: Matthias Blume
674    Date: 2002/10/28 09:50:00 EST
675    Tag: blume-20021028-typecheck
676    Description:
677    
678    Exported structure Typecheck from $smlnj/viscomp/core.cm.
679    
680    ----------------------------------------------------------------------
681    Name: Matthias Blume
682    Date: 2002/10/17 09:10:00 EDT
683    Tag: Release_110_42
684    Description:
685    
686    In good old tradition, there has been a slight hiccup so that we have
687    to patch 110.42 after the fact.   The old release tag has been replaced
688    (see below).
689    
690    The change solves a problem with two competing approaches the
691    configuration problem regarding MacOS 10.1 vs. MacOS 10.2 which got in
692    each other's way.
693    
694    This change only affects the runtime system code and the installer script.
695    (No new bootfiles.)
696    
697    ----------------------------------------------------------------------
698    Name: Matthias Blume
699    Date: 2002/10/16 12:00:00 EDT
700    Tag: Release_110_42_removed
701    Description:
702    
703    New working release.  New bootfiles.
704    
705    ----------------------------------------------------------------------
706    Name: Matthias Blume
707    Date: 2002/10/10 13:10:00 EDT
708    Tag: blume-20021010-ppc-divs
709    Description:
710    
711    The mltree operator DIVS must be implemented with an overflow check on
712    the PPC because the hardware indicates divide-by-zero using "overflow" as
713    well.
714    
715    ----------------------------------------------------------------------
716    Name: Matthias Blume
717    Date: 2002/07/23 11:45:00
718    Tag: blume-20020723-smlnj-home
719    Description:
720    
721    Sml now senses the SMLNJ_HOME environment variable.  If this is set,
722    then the bin dir is assumed to be in $SMLNJ_HOME/bin and (unless
723    CM_PATHCONFIG is also set), the path configuration file is assumed
724    to be in $SMLNJ_HOME/lib/pathconfig.  This way one can easily move
725    the entire tree to some other place and everything will "just work".
726    
727    (Companion commands such as ml-build and ml-makedepend also sense this
728    variable.)
729    
730    ----------------------------------------------------------------------
731    Name: Matthias Blume
732    Date: 2002/07/12 21:19:00 EDT
733    Tag: blume-20020712-liveness
734    Description:
735    
736    Exported two useful "step" functions from liveness module (MLRISC).
737    
738    ----------------------------------------------------------------------
739    Name: Matthias Blume
740    Date: 2002/07/05 16:00 EDT
741    Tag: Release_110_41
742    Description:
743    
744    New working release.  New bootfiles.
745    
746    ----------------------------------------------------------------------
747    Name: Matthias Blume
748    Date: 2002/07/05 10:25:00 EDT
749    Tag: blume-20020705-btimp
750    Description:
751    
752    Exported structure BTImp from $smlnj/viscomp/debugprof.cm so that
753    other clients can set up backtracing support.
754    
755    ----------------------------------------------------------------------
756    Name: Matthias Blume
757    Date: 2002/06/25 17:23:00 EDT
758    Tag: blume-20020625-fpmax
759    Description:
760    
761    Fixed a bug in translation of INLMAX (and INLMIN) for the floating-point
762    case.  (The sense of the isNaN test was reversed -- which made min and
763    max always return their first argument.)
764    
765    ----------------------------------------------------------------------
766    Name: Matthias Blume
767    Date: 2002/06/11
768    Tag: blume-20020611-unixpath
769    Description:
770    
771    Back-ported OS.Path.{from,to}UnixPath from idlbasis-devel branch.
772    
773    ----------------------------------------------------------------------
774    Name: Matthias Blume
775    Date: 2002/06/10 16:35:00 EDT
776    Tag: blume-20020610-ieeereal
777    Description:
778    
779    I back-ported my implementation of IEEEReal.fromString from the
780    idlbasis-devel branch so that we can test it.
781    
782    Another small change is that ppDec tries to give more information
783    than just "<sig>" in the case of functors.  However, this code is
784    broken in some mysterious way if the functor's body's signature
785    has not been declared by ascription but gets inferred from the
786    implementation.  This needs fixing...
787    
788    ----------------------------------------------------------------------
789    Name: Matthias Blume
790    Date: 2002/05/31
791    Tag: blume-20020531-btrace-mode
792    Description:
793    
794    Resurrected SMLofNJ.Internals.BTrace.mode.  (It accidentally fell by
795    the wayside when I switched over to using Controls everywhere.)
796    
797    ----------------------------------------------------------------------
798    Name: Lal George
799    Date: 2002/05/23 12:21:40 EDT
800    Tag: george-20020523-visual-labels
801    Description:
802    
803    Labels are now displayed in the graphical output to make
804    the fall-through and target blocks obvious.
805    
806    ----------------------------------------------------------------------
807    Name: Matthias Blume
808    Date: 2002/05/22 11:03:00 EDT
809    Tag: blume-20020522-shrink
810    Description:
811    
812    John tweaked yesterday's fix for 1131 to handle an out-of-memory
813    situation that comes up when allocating huge arrays.
814    
815    ----------------------------------------------------------------------
816    Name: Matthias Blume
817    Date: 2002/05/21 16:00:00 EDT
818    Tag: Release_110_40
819    Description:
820    
821    New working release (110.40).  New bootfiles.
822    
823    [Also: John Reppy fixed GC bug 1131.]
824    
825    ----------------------------------------------------------------------
826    Name: Matthias Blume
827    Date: 2002/05/21 12:35:00 EDT
828    Tag: blume-20020521-cmdoc
829    Description:
830    
831    CM documentation update.
832    
833    ----------------------------------------------------------------------
834    Name: Matthias Blume
835    Date: 2002/05/21 10:55:00 EDT
836    Tag: blume-20020521-misc
837    Description:
838    
839    - John tweaked runtime to be silent on heap export (except when
840      GC messages are on).
841    - I added a few more things (cross-compiling versions of CMB) to
842      config/preloads (as suggestions).
843    
844    ----------------------------------------------------------------------
845    Name: Matthias Blume
846    Date: 2002/05/20 22:25:00 EDT
847    Tag: blume-20020520-controls
848    Description:
849    
850    - Added ControlUtil structure to control-lib.cm.
851    - Use it throughout.
852    - Used Controls facility to define MLRISC controls (as opposed to
853      registering MLRISC control ref cells with Controls after the fact)
854    - Fixed messed-up controls priorities.
855    
856    * Removed again all the stuff from config/preloads that one wouldn't
857      be able to preload at the time the initial heap image is built.
858      (Many libraries, e.g., CML, do not exist yet at this time.  The
859       only libraries that can be preloaded via config/preloads are those
860       that come bundled with the bootfiles.)
861    
862    ----------------------------------------------------------------------
863    Name: Matthias Blume
864    Date: 2002/05/20 10:59:00 EDT
865    Tag: blume-20020520-preloads
866    Description:
867    
868    Added a lot of commented-out suggestions for things to be included
869    in config/preloads.
870    
871    ----------------------------------------------------------------------
872    Name: Allen Leung
873    Date: 2002/05/18 14:20:00 EDT
874    Tag: leunga-20020518-mdl
875    Description:
876    
877    o Made the mdl tool stuff compile and run again.
878    o I've disabled all the stuff that depends on RTL specifications; they
879      are all badly broken anyway.
880    
881    ----------------------------------------------------------------------
882    Name: Matthias Blume
883    Date: 2002/05/17 16:49:00 EDT
884    Tag: blume-20020517-controls
885    Description:
886    
887    0. John Reppy made several modifications to the SML/NJ library.
888       In particular, there is a shiny new controls-lib.cm.
889    
890    1. Pushed new controls interface through compiler so that everything
891       compiles again.
892    
893    2. Added FormatComb and FORMAT_COMB to the CML version of the
894       SML/NJ library (so that CML compiles again).
895    
896    3. Modified init scripts because XXX_DEFAULT environment variables
897       are no longer with us.  (Boot-time initialization is now done
898       using the same environment variables that are also used for
899       startup-time initialization of controls.)
900    
901    ----------------------------------------------------------------------
902    Name: Lal George
903    Date: 2002/05/15 09:20:10 EDT
904    Tag: george-20020515-pseudo-op-decls
905    Description:
906    
907            All pseudo-ops emitted before the first segment declaration
908    such as TEXT, DATA, and BSS directives are assumed to be global
909    declarations and are emitted first in the assembly file. This is
910    useful in a number of situations where one has pseudo-ops that are not
911    specific to any segment, and also works around the constraint that one
912    cannot have client pseudo-ops in the TEXT segment.
913    
914            Because no segment is associated with these declarations it is
915    an error to allocate any space or objects before the first segment
916    directive and an exception will be raised. However, we cannot make
917    this check for client pseudo-ops.
918    
919            These top level declarations are a field in the CFG graph_info.
920    In theory you can continue to add to this field after the CFG has been
921    built -- provided you know what you are doing;-)
922    
923    ----------------------------------------------------------------------
924    Name: Matthias Blume
925    Date: 2002/05/13 16:40:00 EDT
926    Tag: blume-20020513-pp-etc
927    Description:
928    
929    A few minor bugfixes:
930    
931      - Stopgap measure for bug recently reported by Elsa Gunter (ppDec).
932        (Bogus printouts for redefined bindings still occur.  Compiler
933        bug should no longer occur now.  We need to redo the prettyprinter
934        from scratch.)
935    
936      - CM pathname printer now also adds escape sequences for ( and )
937    
938      - commend and docu fixes for ml-nlffi
939    
940    ----------------------------------------------------------------------
941    Name: Matthias Blume
942    Date: 2002/05/10 16:40:00 EDT
943    Tag: blume-20020510-erg-textio
944    Description:
945    
946    Applied the following bugfix provided by Emden Gansner:
947    
948        Output is corrupted when outputSubstr is used rather than output.
949    
950        The problem occurs when a substring
951    
952            ss = (s, dataStart, dataLen)
953    
954        where dataStart > 0, fills a stream buffer with avail bytes left.
955        avail bytes of s, starting at index dataStart, are copied into the
956        buffer, the buffer is flushed, and then the remaining dataLen-avail
957        bytes of ss are copied into the beginning of the buffer. Instead of
958        starting this copy at index dataStart+avail in s, the current code
959        starts the copy at index avail.
960    
961        Fix:
962        In text-io-fn.sml, change line 695 from
963             val needsFlush = copyVec(v, avail, dataLen-avail, buf, 0)
964        to
965             val needsFlush = copyVec(v, dataStart+avail, dataLen-avail, buf, 0)
966    
967    ----------------------------------------------------------------------
968    Name: Matthias Blume
969    Date: 2002/04/12 13:55:00 EDT
970    Tag: blume-20020412-assyntax
971    Description:
972    
973    1. Grabbed newer assyntax.h from the XFree86 project.
974    2. Fiddled with how to compile X86.prim.asm without warnings.
975    3. (Very) Minor cleanup in CM.
976    
977    ----------------------------------------------------------------------
978    Name: Matthias Blume
979    Date: 2002/04/01 (no joke!) 17:07:00 EST
980    Tag: blume-20020401-x86div
981    Description:
982    
983    Added full support for div/mod/rem/quot on the x86, using the machine
984    instruction's two results (without clumsily recomputing the remainder)
985    directly where appropriate.
986    
987    Some more extensive power-of-two support was added to the x86 instruction
988    selector (avoiding expensive divs, mods, and muls where they can be
989    replaced with cheaper shifts and masks).  However, this sort of thing
990    ought to be done earlier, e.g., within the CPS optimizer so that
991    all architectures benefit from it.
992    
993    The compiler compiles to a fixed point, but changes might be somewhat
994    fragile nevertheless.  Please, report any strange things that you might
995    see wrt. div/mod/quot/rem...
996    
997    ----------------------------------------------------------------------
998    Name: Matthias Blume
999    Date: 2002/03/29 17:22:00
1000    Tag: blume-20020329-div
1001    Description:
1002    
1003    Fixed my broken div/mod logic.  Unfortunately, this means that the
1004    inline code for div/mod now has one more comparison than before.
1005    Fast paths (quotient > 0 or remainder = 0) are not affected, though.
1006    The problem was with quotient = 0, because that alone does not tell
1007    us which way the rounding went.  One then has to look at whether
1008    remainder and divisor have the same sign...  :(
1009    
1010    Anyway, I replaced the bootfiles with fresh ones...
1011    
1012    ----------------------------------------------------------------------
1013    Name: Matthias Blume
1014    Date: 2002/03/29 14:10:00 EST
1015    Tag: blume-20020329-inlprims
1016    Description:
1017    
1018    NEW BOOTFILES!!!    Version number bumped to 110.39.3.
1019    
1020    Primops have changed. This means that the bin/boot-file formats have
1021    changed as well.
1022    
1023    To make sure that there is no confusion, I made a new version.
1024    
1025    
1026    CHANGES:
1027    
1028    * removed REMT from mltree (remainder should never overflow).
1029    
1030    * added primops to deal with divisions of all flavors to the frontend
1031    
1032    * handled these primops all the way through so they map to their respective
1033      MLRISC support
1034    
1035    * used these primops in the implementation of Int, Int32, Word, Word32
1036    
1037    * removed INLDIV, INLMOD, and INLREM as they are no longer necessary
1038    
1039    * parameterized INLMIN, INLMAX, and INLABS by a numkind
1040    
1041    * translate.sml now deals with all flavors of INL{MIN,MAX,ABS}, including
1042      floating point
1043    
1044    * used INL{MIN,MAX,ABS} in the implementation of Int, Int32, Word, Word32,
1045      and Real (but Real.abs maps to a separate floating-point-only primop)
1046    
1047    
1048    TODO items:
1049    
1050    * Hacked Alpha32 instruction selection, disabling the selection of REMx
1051      instructions because the machine instruction encoder cannot handle
1052      them.  (Hppa, PPC, and Sparc instruction selection did not handle
1053      REM in the first place, and REM is supported by the x86 machine coder.)
1054    
1055    * Handle DIV and MOD with DIV_TO_NEGINF directly in the x86 instruction
1056      selection phase.  (The two can be streamlined because the hardware
1057      delivers both quotient and remainder at the same time anyway.)
1058    
1059    * Think about what to do with "valOf(Int32.minInt) div ~1" and friends.
1060      (Currently the behavior is inconsistent both across architectures and
1061      wrt. the draft Basis spec.)
1062    
1063    * Word8 should eventually be handled natively, too.
1064    
1065    * There seems to be one serious bug in mltree-gen.sml.  It appears, though,
1066      as if there currently is no execution path that could trigger it in
1067      SML/NJ.  (The assumptions underlying functions arith and promotable do not
1068      hold for things like multiplication and division.)
1069    
1070    ----------------------------------------------------------------------
1071    Name: Matthias Blume
1072    Date: 2002/03/27 16:27:00 EST
1073    Tag: blume-20020327-mlrisc-divisions
1074    Description:
1075    
1076    Added support for all four division operations (ML's div, mod, quot,
1077    and rem) to MLRISC.  In the course of doing so, I also rationalized
1078    the naming (no more annoying switch-around of DIV and QUOT), by
1079    parameterizing the operation by div_rounding_mode (which can be either
1080    DIV_TO_ZERO or DIV_TO_NEGINF).
1081    
1082    The generic MLTreeGen functor takes care of compiling all four
1083    operations down to only round-to-zero div.
1084    
1085    Missing pieces:
1086    
1087      * Doing something smarter than relying on MLTreeGen on architectures
1088        like, e.g., the x86 where hardware division delivers both quotient and
1089        remainder at the same time.  With this, the implementation of the
1090        round-to-neginf operations could be further streamlined.
1091    
1092      * Remove inlining support for div/mod/rem from the frontend and replace it
1093        with primops that get carried through to the backend.  Do this for all
1094        int and word types.
1095    
1096    ----------------------------------------------------------------------
1097    Name: Matthias Blume
1098    Date: 2002/03/25 17:25:00 EST
1099    Tag: blume-20020325-divmod
1100    Description:
1101    
1102    I improved (hopefully without breaking them) the implementation of Int.div,
1103    Int.mod, and Int.rem.   For this, the code in translate.sml now takes
1104    advantage of the following observations:
1105    
1106      Let  q = x quot y      r = x rem y
1107           d = x div  y      m = x mod y
1108    
1109    where "quot" is the round-to-zero version of integer division that
1110    hardware usually provides.  Then we have:
1111    
1112         r = x - q * y        where neither the * nor the - will overflow
1113         d = if q >= 0 orelse x = q * y then q else q - 1
1114                              where neither the * nor the - will overflow
1115         m = if q >= 0 orelse r = 0 then r else r + y
1116                              where the + will not overflow
1117    
1118    This results in substantial simplification of the generated code.
1119    The following table shows the number of CFG nodes and edges generated
1120    for
1121            fun f (x, y) = x OPER y
1122            (* with OPER \in div, mod, quot, rem *)
1123    
1124    
1125        OPER | nodes(old) | edges(old) | nodes(new) | edges(new)
1126        --------------------------------------------------------
1127         div |         24 |         39 |         12 |         16
1128         mod |         41 |         71 |         12 |         16
1129        quot |          8 |         10 |          8 |         10
1130         rem |         10 |         14 |          8 |         10
1131    
1132    
1133    ----------------------------------------------------------------------
1134    Name: Matthias Blume
1135    Date: 2002/03/25 22:06:00 EST
1136    Tag: blume-20020325-cprotobug
1137    Description:
1138    
1139    Fixed a bug in cproto (c prototype decoder).
1140    
1141    ----------------------------------------------------------------------
1142    Name: Matthias Blume
1143    Date: 2002/03/25 16:00:00 EST
1144    Tag: blume-20020325-raw-primops
1145    Description:
1146    
1147    I did some cleanup to Allen's new primop code and
1148    replaced yesterday's bootfiles with new ones.
1149    (But they are stored in the same place.)
1150    
1151    ----------------------------------------------------------------------
1152    Name: Matthias Blume
1153    Date: 2002/03/24 22:40:00 EST
1154    Tag: blume-20020324-bootfiles
1155    Description:
1156    
1157    Made the bootfiles that Allen asked for.
1158    
1159    ----------------------------------------------------------------------
1160    Name: Allen Leung
1161    Date: 2002/03/23 15:50:00 EST
1162    Tag: leunga-20020323-flint-cps-rcc-primops
1163    Description:
1164    
1165      1. Changes to FLINT primops:
1166    
1167        (* make a call to a C-function;
1168         * The primop carries C function prototype information and specifies
1169         * which of its (ML-) arguments are floating point. C prototype
1170         * information is for use by the backend, ML information is for
1171         * use by the CPS converter. *)
1172      | RAW_CCALL of { c_proto: CTypes.c_proto,
1173                       ml_args: ccall_type list,
1174                       ml_res_opt: ccall_type option,
1175                       reentrant : bool
1176                     } option
1177       (* Allocate uninitialized storage on the heap.
1178        * The record is meant to hold short-lived C objects, i.e., they
1179        * are not ML pointers.  With the tag, the representation is
1180        * the same as RECORD with tag tag_raw32 (sz=4), or tag_fblock (sz=8)
1181        *)
1182      | RAW_RECORD of {tag:bool,sz:int}
1183      and ccall_type = CCALL_INT32 | CCALL_REAL64 | CCALL_ML_PTR
1184    
1185      2.  These CPS primops are now overloaded:
1186    
1187           rawload of {kind:numkind}
1188           rawstore of {kind:numkind}
1189    
1190          The one argument form is:
1191    
1192             rawload {kind} address
1193    
1194          The two argument form is:
1195    
1196             rawload {kind} [ml object, byte-offset]
1197    
1198      3. RAW_CCALL/RCC now takes two extra arguments:
1199    
1200         a. The first is whether the C call is reentrant, i.e., whether
1201            ML state should be saved and restored.
1202         b. The second argument is a string argument specifying the name of
1203            library and the C function.
1204    
1205         These things are currently not handled in the code generator, yet.
1206    
1207      4. In CProto,
1208    
1209         An encoding type of "bool" means "ml object" and is mapped into
1210         C prototype of PTR.  Note that "bool" is different than "string",
1211         even though "string" is also mapped into PTR, because "bool"
1212         is assigned an CPS type of BOGt, while "string" is assigned INT32t.
1213    
1214      5. Pickler/unpicker
1215    
1216         Changed to handle RAW_RECORD and newest RAW_CCALL
1217    
1218      6. MLRiscGen,
1219    
1220         1. Changed to handle the new rawload/rawstore/rawrecord operators.
1221         2. Code for handling C Calls has been moved to a new module CPSCCalls,
1222            in the file CodeGen/cpscompile/cps-c-calls.sml
1223    
1224      7. Added the conditional move operator
1225    
1226             condmove of branch
1227    
1228         to cps.  Generation of this is still buggy so it is currently
1229         disabled.
1230    
1231    ----------------------------------------------------------------------
1232    Name: Lal George
1233    Date: 2002/03/22 14:18:25 EST
1234    Tag: george-20020322-cps-branch-prob
1235    Description:
1236    
1237    Implemented the Ball-Larus branch prediction-heuristics, and
1238    incorporated graphical viewers for control flow graphs.
1239    
1240    Ball-Larus Heuristics:
1241    ---------------------
1242    See the file compiler/CodeGen/cpscompile/cpsBranchProb.sml.
1243    
1244    By design it uses the Dempster-Shafer theory for combining
1245    probabilities.  For example, in the function:
1246    
1247        fun f(n,acc) = if n = 0 then acc else f(n-1, n*acc)
1248    
1249    the ball-larus heuristics predicts that the n=0 is unlikely
1250    (OH-heuristic), and the 'then' branch is unlikely because of the
1251    RH-heuristic -- giving the 'then' branch an even lower combined
1252    probability using the Dempster-Shafer theory.
1253    
1254    Finally, John Reppy's loop analysis in MLRISC, further lowers the
1255    probability of the 'then' branch because of the loop in the else
1256    branch.
1257    
1258    
1259    Graphical Viewing:
1260    ------------------
1261    I merely plugged in Allen's graphical viewers into the compiler. The
1262    additional code is not much. At the top level, saying:
1263    
1264            Control.MLRISC.getFlag "cfg-graphical-view" := true;
1265    
1266    will display the graphical view of the control flow graph just before
1267    back-patching.  daVinci must be in your path for this to work. If
1268    daVinci is not available, then the default viewer can be changed
1269    using:
1270    
1271            Control.MLRISC.getString "viewer"
1272    
1273    which can be set to "dot" or "vcg" for the corresponding viewers. Of
1274    course, these viewers must be in your path.
1275    
1276    The above will display the compilation unit at the level of clusters,
1277    many of which are small, boring, and un-interesting. Also setting:
1278    
1279            Control.MLRISC.getInt "cfg-graphical-view_size"
1280    
1281    will display clusters that are larger than the value set by the above.
1282    
1283    
1284    ----------------------------------------------------------------------
1285    Name: Matthias Blume
1286    Date: 2002/03/21 22:20:00 EST
1287    Tag: blume-20020321-kmp-bugfix
1288    Description:
1289    
1290    Changed the interface to the KMP routine in PreString and fixed
1291    a minor bug in one place where it was used.
1292    
1293    ----------------------------------------------------------------------
1294    Name: Allen Leung
1295    Date: 2002/03/21 20:30:00 EST
1296    Tag: leunga-20020321-cfg
1297    Description:
1298    
1299      Fixed a potential problem in cfg edge splitting.
1300    
1301    ----------------------------------------------------------------------
1302    Name: Allen Leung
1303    Date: 2002/03/21 17:15:00 EST
1304    Tag: leunga-20020321-x86-fp-cfg
1305    Description:
1306    
1307      1. Recoded the buggy parts of x86-fp.
1308    
1309         a. All the block reordering code has been removed.
1310            We now depend on the block placement phases to do this work.
1311    
1312         b. Critical edge splitting code has been simplified and moved into the
1313            CFG modules, as where they belong.
1314    
1315         Both of these were quite buggy and complex.  The code is now much, much
1316         simpler.
1317    
1318      2. X86 backend.
1319    
1320         a. Added instructions for 64-bit support.  Instruction selection for
1321            64-bit has not been committed, however, since that
1322            requires changes to MLTREE which haven't been approved by
1323            Lal and John.
1324    
1325         b. Added support for FUCOMI and FUCOMIP when generating code for
1326            PentiumPro and above.  We only generate these instructions in
1327            the fast-fp mode.
1328    
1329         c. Added cases for JP and JNP in X86FreqProps.
1330    
1331      3. CFG
1332    
1333         CFG now has a bunch of methods for edge splitting and merging.
1334    
1335      4. Machine description.
1336    
1337         John's simplification of MLTREE_BASIS.fcond broke a few machine
1338         description things:
1339    
1340         rtl-build.{sig,sml} and hppa.mdl fixed.
1341    
1342         NOTE: the machine description stuff in the repository is still broken.
1343               Again, I can't put my fixes in because that involves
1344               changes to MLTREE.
1345    
1346    ----------------------------------------------------------------------
1347    Name: Matthias Blume
1348    Date: 2002/03/20 15:55:00 EST
1349    Tag: blume-20020320-kmp
1350    Description:
1351    
1352    Implemented Knuth-Morris-Pratt string matching in PreString and used
1353    it for String.isSubstring, Substring.isSubstring, and
1354    Substring.position.
1355    
1356    (Might need some stress-testing.  Simple examples worked fine.)
1357    
1358    ----------------------------------------------------------------------
1359    Name: Matthias Blume
1360    Date: 2002/03/19 16:37:00 EST
1361    Tag: blume-20020319-witnesses
1362    Description:
1363    
1364    Added a structure C.W and functions convert/Ptr.convert to ml-nlffi-lib.
1365    
1366    This implements a generic mechanism for changing constness qualifiers
1367    anywhere within big C types without resorting to outright "casts".
1368    (So far, functions such as C.rw/C.ro or C.Ptr.rw/C.Ptr.ro only let you
1369    modify the constness at the outermost level.)
1370    The implementation of "convert" is based on the idea of "witness"
1371    values -- values that are not used by the operation but whose types
1372    "testify" to their applicability.  On the implementation side, "convert"
1373    is simply a projection (returning its second curried argument).  With
1374    cross-module inlining, it should not result in any machine code being
1375    generated.
1376    
1377    ----------------------------------------------------------------------
1378    Name: Matthias Blume
1379    Date: 2002/03/15 16:40:00 EST
1380    Tag: blume-20020315-basis
1381    Description:
1382    
1383    Provided (preliminary?) implementations for
1384    
1385      {String,Substring}.{concatWith,isSuffix,isSubstring}
1386    
1387    and
1388    
1389      Substring.full
1390    
1391    Those are in the Basis spec but they were missing in SML/NJ.
1392    
1393    ----------------------------------------------------------------------
1394    Name: Matthias Blume
1395    Date: 2002/03/14 21:30:00 EST
1396    Tag: blume-20020314-controls
1397    Description:
1398    
1399    Controls:
1400    ---------
1401    
1402    1. Factored out the recently-added Controls : CONTROLS stuff and put
1403       it into its own library $/controls-lib.cm.  The source tree for
1404       this is under src/smlnj-lib/Controls.
1405    
1406    2. Changed the names of types and functions in this interface, so they
1407       make a bit more "sense":
1408    
1409          module -> registry
1410          'a registry -> 'a group
1411    
1412    3. The interface now deals in ref cells only.  The getter/setter interface
1413       is (mostly) gone.
1414    
1415    4. Added a function that lets one register an already-existing ref cell.
1416    
1417    5. Made the corresponding modifications to the rest of the code so that
1418       everything compiles again.
1419    
1420    6. Changed the implementation of Controls.MLRISC back to something closer
1421       to the original.  In particular, this module (and therefore MLRISC)
1422       does not depend on Controls.  There now is some link-time code in
1423       int-sys.sml that registers the MLRISC controls with the Controls
1424       module.
1425    
1426    CM:
1427    ---
1428    
1429      * One can now specify the lambda-split aggressiveness in init.cmi.
1430    
1431    ----------------------------------------------------------------------
1432    Name: Allen Leung
1433    Date: 2002/03/13 17:30:00 EST
1434    Tag: leunga-20020313-x86-fp-unary
1435    Description:
1436    
1437    Bug fix for:
1438    
1439    > leunga@weaselbane:~/Yale/tmp/sml-dist{21} bin/sml
1440    > Standard ML of New Jersey v110.39.1 [FLINT v1.5], March 08, 2002
1441    > - fun f(x,(y,z)) = Real.~ y;
1442    > [autoloading]
1443    > [autoloading done]
1444    >       fchsl   (%eax), 184(%esp)
1445    > Error: MLRisc bug: X86MCEmitter.emitInstr
1446    >
1447    > uncaught exception Error
1448    >   raised at: ../MLRISC/control/mlriscErrormsg.sml:16.14-16.19
1449    
1450    The problem was that the code generator did not generate any fp registers
1451    in this case, and the ra didn't know that it needed to run the X86FP phase to
1452    translate the pseudo fp instruction.   This only happened with unary fp
1453    operators in certain situations.
1454    
1455    ----------------------------------------------------------------------
1456    Name: Matthias Blume
1457    Date: 2002/03/13 14:00:00 EST
1458    Tag: blume-20020313-overload-etc
1459    Description:
1460    
1461    1. Added _overload as a synonym for overload for backward compatibility.
1462       (Control.overloadKW must be true for either version to be accepted.)
1463    
1464    2. Fixed bug in install script that caused more things to be installed
1465       than what was requested in config/targets.
1466    
1467    3. Made CM aware of the (_)overload construct so that autoloading
1468       works.
1469    
1470    ----------------------------------------------------------------------
1471    Name: Matthias Blume
1472    Date: 2002/03/12 22:03:00 EST
1473    Tag: blume-20020312-url
1474    Description:
1475    
1476    Forgot to update BOOT and srcarchiveurl.
1477    
1478    ----------------------------------------------------------------------
1479    Name: Matthias Blume
1480    Date: 2002/03/12 17:30:00 EST
1481    Tag: blume-20020312-version110392
1482    Description:
1483    
1484    Yet another version number bump (because of small changes to the
1485    binfile format).  Version number is now 110.39.2.  NEW BOOTFILES!
1486    
1487    Changes:
1488    
1489      The new pid generation scheme described a few weeks ago was overly
1490      complicated.  I implemented a new mechanism that is simpler and
1491      provides a bit more "stability":  Once CM has seen a compilation
1492      unit, it keeps its identity constant (as long as you do not delete
1493      those crucial CM/GUID/* files).  This means that when you change
1494      an interface, compile, then go back to the old interface, and
1495      compile again, you arrive at the original pid.
1496    
1497      There now also is a mechanism that instructs CM to use the plain
1498      environment hash as a module's pid (effectively making its GUID
1499      the empty string).  For this, "noguid" must be specified as an
1500      option to the .sml file in question within its .cm file.
1501      This is most useful for code that is being generated by tools such
1502      as ml-nlffigen (because during development programmers tend to
1503      erase the tool's entire output directory tree including CM's cached
1504      GUIDs).  "noguid" is somewhat dangerous (since it can be used to locally
1505      revert to the old, broken behavior of SML/NJ, but in specific cases
1506      where there is no danger of interface confusion, its use is ok
1507      (I think).
1508    
1509      ml-nlffigen by default generates "noguid" annotations.  They can be
1510      turned off by specifying -guid in its command line.
1511    
1512    ----------------------------------------------------------------------
1513    Name: Lal George
1514    Date: 2002/03/12 12 14:42:36 EST
1515    Tag: george-20020312-frequency-computation
1516    Description:
1517    
1518    Integrated jump chaining and static block frequency into the
1519    compiler. More details and numbers later.
1520    
1521    ----------------------------------------------------------------------
1522    Name: Lal George
1523    Date: 2002/03/11 11 22:38:53 EST
1524    Tag: george-20020311-jump-chain-elim
1525    Description:
1526    
1527    Tested the jump chain elimination on all architectures (except the
1528    hppa).  This is on by default right now and is profitable for the
1529    alpha and x86, however, it may not be profitable for the sparc and ppc
1530    when compiling the compiler.
1531    
1532    The gc test will typically jump to a label at the end of the cluster,
1533    where there is another jump to an external cluster containing the actual
1534    code to invoke gc. This is to allow factoring of common gc invocation
1535    sequences. That is to say, we generate:
1536    
1537            f:
1538               testgc
1539               ja   L1      % jump if above to L1
1540    
1541            L1:
1542               jmp L2
1543    
1544    
1545    After jump chain elimination the 'ja L1' instructions is converted to
1546    'ja L2'. On the sparc and ppc, many of the 'ja L2' instructions may end
1547    up being implemented in their long form (if L2 is far away) using:
1548    
1549            jbe     L3      % jump if below or equal to L3
1550            jmp     L2
1551         L3:
1552            ...
1553    
1554    
1555    For large compilation units L2  may be far away.
1556    
1557    
1558    ----------------------------------------------------------------------
1559    Name: Matthias Blume
1560    Date: 2002/03/11 13:30:00 EST
1561    Tag: blume-20020311-mltreeeval
1562    Description:
1563    
1564    A functor parameter was missing.
1565    
1566    ----------------------------------------------------------------------
1567    Name: Allen Leung
1568    Date: 2002/03/11 10:30:00 EST
1569    Tag: leunga-20020311-runtime-string0
1570    Description:
1571    
1572       The representation of the empty string now points to a
1573    legal null terminated C string instead of unit.  It is now possible
1574    to convert an ML string into C string with InlineT.CharVector.getData.
1575    This compiles into one single machine instruction.
1576    
1577    ----------------------------------------------------------------------
1578    Name: Allen Leung
1579    Date: 2002/03/10 23:55:00 EST
1580    Tag: leunga-20020310-x86-call
1581    Description:
1582    
1583       Added machine generation for CALL instruction (relative displacement mode)
1584    
1585    ----------------------------------------------------------------------
1586    Name: Matthias Blume
1587    Date: 2002/03/08 16:05:00
1588    Tag: blume-20020308-entrypoints
1589    Description:
1590    
1591    Version number bumped to 110.39.1.  NEW BOOTFILES!
1592    
1593    Entrypoints: non-zero offset into a code object where execution should begin.
1594    
1595    - Added the notion of an entrypoint to CodeObj.
1596    - Added reading/writing of entrypoint info to Binfile.
1597    - Made runtime system bootloader aware of entrypoints.
1598    - Use the address of the label of the first function given to mlriscGen
1599      as the entrypoint.  This address is currently always 0, but it will
1600      not be 0 once we turn on block placement.
1601    - Removed the linkage cluster code (which was The Other Way(tm) of dealing
1602      with entry points) from mlriscGen.
1603    
1604    ----------------------------------------------------------------------
1605    Name: Allen Leung
1606    Date: 2002/03/07 20:45:00 EST
1607    Tag: leunga-20020307-x86-cmov
1608    Description:
1609    
1610       Bug fixes for CMOVcc on x86.
1611    
1612       1. Added machine code generation for CMOVcc
1613       2. CMOVcc is now generated in preference over SETcc on PentiumPro or above.
1614       3. CMOVcc cannot have an immediate operand as argument.
1615    
1616    ----------------------------------------------------------------------
1617    Name: Matthias Blume
1618    Date: 2002/03/07 16:15:00 EST
1619    Tag: blume-20020307-controls
1620    Description:
1621    
1622    This is a very large but mostly boring patch which makes (almost)
1623    every tuneable compiler knob (i.e., pretty much everything under
1624    Control.* plus a few other things) configurable via both the command
1625    line and environment variables in the style CM did its configuration
1626    until now.
1627    
1628    Try starting sml with '-h' (or, if you are brave, '-H')
1629    
1630    To this end, I added a structure Controls : CONTROLS to smlnj-lib.cm which
1631    implements the underlying generic mechanism.
1632    
1633    The interface to some of the existing such facilities has changed somewhat.
1634    For example, the MLRiscControl module now provides mkFoo instead of getFoo.
1635    (The getFoo interface is still there for backward-compatibility, but its
1636    use is deprecated.)
1637    
1638    The ml-build script passes -Cxxx=yyy command-line arguments through so
1639    that one can now twiddle the compiler settings when using this "batch"
1640    compiler.
1641    
1642    TODO items:
1643    
1644    We should go through and throw out all controls that are no longer
1645    connected to anything.  Moreover, we should go through and provide
1646    meaningful (and correct!) documentation strings for those controls
1647    that still are connected.
1648    
1649    Currently, multiple calls to Controls.new are accepted (only the first
1650    has any effect).  Eventually we should make sure that every control
1651    is being made (via Controls.new) exactly once.  Future access can then
1652    be done using Controls.acc.
1653    
1654    Finally, it would probably be a good idea to use the getter-setter
1655    interface to controls rather than ref cells.  For the time being, both
1656    styles are provided by the Controls module, but getter-setter pairs are
1657    better if thread-safety is of any concern because they can be wrapped.
1658    
1659    *****************************************
1660    
1661    One bug fix: The function blockPlacement in three of the MLRISC
1662    backpatch files used to be hard-wired to one of two possibilities at
1663    link time (according to the value of the placementFlag).  But (I
1664    think) it should rather sense the flag every time.
1665    
1666    *****************************************
1667    
1668    Other assorted changes (by other people who did not supply a HISTORY entry):
1669    
1670    1. the cross-module inliner now works much better (Monnier)
1671    2. representation of weights, frequencies, and probabilities in MLRISC
1672       changed in preparation of using those for weighted block placement
1673       (Reppy, George)
1674    
1675    ----------------------------------------------------------------------
1676    Name: Lal George
1677    Date: 2002/03/07 14:44:24 EST 2002
1678    Tag: george-20020307-weighted-block-placement
1679    
1680    Tested the weighted block placement optimization on all architectures
1681    (except the hppa) using AMPL to generate the block and edge frequencies.
1682    Changes were required in the machine properties to correctly
1683    categorize trap instructions. There is an MLRISC flag
1684    "weighted-block-placement" that can be used to enable weighted block
1685    placement, but this will be ineffective without block/edge
1686    frequencies (coming soon).
1687    
1688    
1689    ----------------------------------------------------------------------
1690    Name: Lal George
1691    Date: 2002/03/05 17:24:48 EST
1692    Tag: george-20020305-linkage-cluster
1693    
1694    In order to support the block placement optimization, a new cluster
1695    is generated as the very first cluster (called the linkage cluster).
1696    It contains a single jump to the 'real' entry point for the compilation
1697    unit. Block placement has no effect on the linkage cluster itself, but
1698    all the other clusters  have full freedom in the manner in which they
1699    reorder blocks or functions.
1700    
1701    On the x86 the typical linkage code that is generated is:
1702       ----------------------
1703            .align 2
1704       L0:
1705            addl    $L1-L0, 72(%esp)
1706            jmp     L1
1707    
1708    
1709            .align  2
1710       L1:
1711       ----------------------
1712    
1713    72(%esp) is the memory location for the stdlink register. This
1714    must contain the address of the CPS function being called. In the
1715    above example, it contains the address of  L0; before
1716    calling L1 (the real entry point for the compilation unit), it
1717    must contain the address for L1, and hence
1718    
1719            addl $L1-L0, 72(%esp)
1720    
1721    I have tested this on all architectures except the hppa.The increase
1722    in code size is of course negligible
1723    
1724    ----------------------------------------------------------------------
1725    Name: Allen Leung
1726    Date: 2002/03/03 13:20:00 EST
1727    Tag: leunga-20020303-mlrisc-tools
1728    
1729      Added #[ ... ] expressions to mlrisc tools
1730    
1731    ----------------------------------------------------------------------
1732    Name: Matthias Blume
1733    Date: 2002/02/27 12:29:00 EST
1734    Tag: blume-20020227-cdebug
1735    Description:
1736    
1737    - made types in structure C and C_Debug to be equal
1738    - got rid of code duplication (c-int.sml vs. c-int-debug.sml)
1739    - there no longer is a C_Int_Debug (C_Debug is directly derived from C)
1740    
1741    ----------------------------------------------------------------------
1742    Name: Matthias Blume
1743    Date: 2002/02/26 12:00:00 EST
1744    Tag: blume-20020226-ffi
1745    Description:
1746    
1747    1. Fixed a minor bug in CM's "noweb" tool:
1748       If numbering is turned off, then truly don't number (i.e., do not
1749       supply the -L option to noweb).  The previous behavior was to supply
1750       -L'' -- which caused noweb to use the "default" line numbering scheme.
1751       Thanks to Chris Richards for pointing this out (and supplying the fix).
1752    
1753    2. Once again, I reworked some aspects of the FFI:
1754    
1755       A. The incomplete/complete type business:
1756    
1757       - Signatures POINTER_TO_INCOMPLETE_TYPE and accompanying functors are
1758         gone!
1759       - ML types representing an incomplete type are now *equal* to
1760         ML types representing their corresponding complete types (just like
1761         in C).  This is still safe because ml-nlffigen will not generate
1762         RTTI for incomplete types, nor will it generate functions that
1763         require access to such RTTI.   But when ML code generated from both
1764         incomplete and complete versions of the C type meet, the ML types
1765         are trivially interoperable.
1766    
1767         NOTE:  These changes restore the full generality of the translation
1768         (which was previously lost when I eliminated functorization)!
1769    
1770       B. Enum types:
1771    
1772       - Structure C now has a type constructor "enum" that is similar to
1773         how the "su" constructor works.  However, "enum" is not a phantom
1774         type because each "T enum" has values (and is isomorphic to
1775         MLRep.Signed.int).
1776       - There are generic access operations for enum objects (using
1777         MLRep.Signed.int).
1778       - ml-nlffigen will generate a structure E_foo for each "enum foo".
1779         * The structure contains the definition of type "mlrep" (the ML-side
1780         representation type of the enum).  Normally, mlrep is the same
1781         as "MLRep.Signed.int", but if ml-nlffigen was invoked with "-ec",
1782         then mlrep will be defined as a datatype -- thus facilitating
1783         pattern matching on mlrep values.
1784         ("-ec" will be suppressed if there are duplicate values in an
1785          enumeration.)
1786         * Constructors ("-ec") or values (no "-ec") e_xxx of type mlrep
1787         will be generated for each C enum constant xxx.
1788         * Conversion functions m2i and i2m convert between mlrep and
1789         MLRep.Signed.int.  (Without "-ec", these functions are identities.)
1790         * Coversion functions c and ml convert between mlrep and "tag enum".
1791         * Access functions (get/set) fetch and store mlrep values.
1792       - By default (unless ml-nlffigen was invoked with "-nocollect"), unnamed
1793         enumerations are merged into one single enumeration represented by
1794         structure E_'.
1795    
1796    ----------------------------------------------------------------------
1797    Name: Allen Leung
1798    Date: 2002/02/25 04:45:00 EST
1799    Tag: leunga-20020225-cps-spill
1800    
1801    This is a new implementation of the CPS spill phase.
1802    The new phase is in the new file compiler/CodeGen/cpscompile/spill-new.sml
1803    In case of problems, replace it with the old file spill.sml
1804    
1805    The current compiler runs into some serious performance problems when
1806    constructing a large record.  This can happen when we try to compile a
1807    structure with many items.  Even a very simple structure like the following
1808    makes the compiler slow down.
1809    
1810        structure Foo = struct
1811           val x_1 = 0w1 : Word32.int
1812           val x_2 = 0w2 : Word32.int
1813           val x_3 = 0w3 : Word32.int
1814           ...
1815           val x_N = 0wN : Word32.int
1816        end
1817    
1818    The following table shows the compile time, from N=1000 to N=4000,
1819    with the old compiler:
1820    
1821    N
1822    1000   CPS 100 spill                           0.04u  0.00s  0.00g
1823           MLRISC ra                               0.06u  0.00s  0.05g
1824              (spills = 0 reloads = 0)
1825           TOTAL                                   0.63u  0.07s  0.21g
1826    
1827    1100   CPS 100 spill                           8.25u  0.32s  0.64g
1828           MLRISC ra                               5.68u  0.59s  3.93g
1829              (spills = 0 reloads = 0)
1830           TOTAL                                   14.71u  0.99s  4.81g
1831    
1832    1500   CPS 100 spill                           58.55u  2.34s  1.74g
1833           MLRISC ra                               5.54u  0.65s  3.91g
1834              (spills = 543 reloads = 1082)
1835           TOTAL                                   65.40u  3.13s  6.00g
1836    
1837    2000   CPS 100 spill                           126.69u  4.84s  3.08g
1838           MLRISC ra                               0.80u  0.10s  0.55g
1839              (spills = 42 reloads = 84)
1840           TOTAL                                   129.42u  5.10s  4.13g
1841    
1842    3000   CPS 100 spill                           675.59u  19.03s  11.64g
1843           MLRISC ra                               2.69u  0.27s  1.38g
1844              (spills = 62 reloads = 124)
1845           TOTAL                                   682.48u  19.61s  13.99g
1846    
1847    4000   CPS 100 spill                           2362.82u  56.28s  43.60g
1848           MLRISC ra                               4.96u  0.27s  2.72g
1849              (spills = 85 reloads = 170)
1850           TOTAL                                   2375.26u  57.21s  48.00g
1851    
1852    As you can see the old cps spill module suffers from some serious
1853    performance problem.  But since I cannot decipher the old code fully,
1854    instead of patching the problems up, I'm reimplementing it
1855    with a different algorithm.  The new code is more modular,
1856    smaller when compiled, and substantially faster
1857    (O(n log n) time and O(n) space).  Timing of the new spill module:
1858    
1859    4000  CPS 100 spill                           0.02u  0.00s  0.00g
1860          MLRISC ra                               0.25u  0.02s  0.15g
1861             (spills=1 reloads=3)
1862          TOTAL                                   7.74u  0.34s  1.62g
1863    
1864    Implementation details:
1865    
1866    As far as I can tell, the purpose of the CPS spill module is to make sure the
1867    number of live variables at any program point (the bandwidth)
1868    does not exceed a certain limit, which is determined by the
1869    size of the spill area.
1870    
1871    When the bandwidth is too large, we decrease the register pressure by
1872    packing live variables into spill records.  How we achieve this is
1873    completely different than what we did in the old code.
1874    
1875    First, there is something about the MLRiscGen code generator
1876    that we should be aware of:
1877    
1878    o MLRiscGen performs code motion!
1879    
1880       In particular, it will move floating point computations and
1881       address computations involving only the heap pointer to
1882       their use sites (if there is only a single use).
1883       What this means is that if we have a CPS record construction
1884       statement
1885    
1886           RECORD(k,vl,w,e)
1887    
1888       we should never count the new record address w as live if w
1889       has only one use (which is often the case).
1890    
1891       We should do something similar to floating point, but the transformation
1892       there is much more complex, so I won't deal with that.
1893    
1894    Secondly, there are now two new cps primops at our disposal:
1895    
1896     1. rawrecord of record_kind option
1897        This pure operator allocates some uninitialized storage from the heap.
1898        There are two forms:
1899    
1900         rawrecord NONE [INT n]  allocates a tagless record of length n
1901         rawrecord (SOME rk) [INT n] allocates a tagged record of length n
1902                                     and initializes the tag.
1903    
1904     2. rawupdate of cty
1905          rawupdate cty (v,i,x)
1906          Assigns to x to the ith component of record v.
1907          The storelist is not updated.
1908    
1909    We use these new primops for both spilling and increment record construction.
1910    
1911     1. Spilling.
1912    
1913        This is implemented with a linear scan algorithm (but generalized
1914        to trees).  The algorithm will create a single spill record at the
1915        beginning of the cps function and use rawupdate to spill to it,
1916        and SELECT or SELp to reload from it.  So both spills and reloads
1917        are fine-grain operations.  In contrast, in the old algorithm
1918        "spills" have to be bundled together in records.
1919    
1920        Ideally, we should sink the spill record construction to where
1921        it is needed.  We can even split the spill record into multiple ones
1922        at the places where they are needed.  But CPS is not a good
1923        representation for global code motion, so I'll keep it simple and
1924        am not attempting this.
1925    
1926     2. Incremental record construction (aka record splitting).
1927    
1928        Long records with many component values which are simulatenously live
1929        (recall that single use record addresses are not considered to
1930         be live) are constructed with rawrecord and rawupdate.
1931        We allocate space on the heap with rawrecord first, then gradually
1932        fill it in with rawupdate.  This is the technique suggested to me
1933        by Matthias.
1934    
1935        Some restrictions on when this is applicable:
1936        1. It is not a VECTOR record.  The code generator currently does not handle
1937           this case. VECTOR record uses double indirection like arrays.
1938        2. All the record component values are defined in the same "basic block"
1939           as the record constructor.  This is to prevent speculative
1940           record construction.
1941    
1942    ----------------------------------------------------------------------
1943    Name: Allen Leung
1944    Date: 2002/02/22 01:02:00 EST
1945    Tag: leunga-20020222-mlrisc-tools
1946    
1947    Minor bug fixes in the parser and rewriter
1948    
1949    ----------------------------------------------------------------------
1950    Name: Allen Leung
1951    Date: 2002/02/21 20:20:00 EST
1952    Tag: leunga-20020221-peephole
1953    
1954    Regenerated the peephole files.  Some contained typos in the specification
1955    and some didn't compile because of pretty printing bugs in the old version
1956    of 'nowhere'.
1957    
1958    ----------------------------------------------------------------------
1959    Name: Allen Leung
1960    Date: 2002/02/19 20:20:00 EST
1961    Tag: leunga-20020219-mlrisc-tools
1962    Description:
1963    
1964       Minor bug fixes to the mlrisc-tools library:
1965    
1966       1.  Fixed up parsing colon suffixed keywords
1967       2.  Added the ability to shut the error messages up
1968       3.  Reimplemented the pretty printer and fixed up/improved
1969           the pretty printing of handle and -> types.
1970       4.  Fixed up generation of literal symbols in the nowhere tool.
1971       5.  Added some SML keywords to to sml.sty
1972    
1973    ----------------------------------------------------------------------
1974    Name: Matthias Blume
1975    Date: 2002/02/19 16:20:00 EST
1976    Tag: blume-20020219-cmffi
1977    Description:
1978    
1979    A wild mix of changes, some minor, some major:
1980    
1981    * All C FFI-related libraries are now anchored under $c:
1982        $/c.cm      --> $c/c.cm
1983        $/c-int.cm  --> $c/internals/c-int.cm
1984        $/memory.cm --> $c/memory/memory.cm
1985    
1986    * "make" tool (in CM) now treats its argument pathname slightly
1987      differently:
1988        1. If the native expansion is an absolute name, then before invoking
1989           the "make" command on it, CM will apply OS.Path.mkRelative
1990           (with relativeTo = OS.FileSys.getDir()) to it.
1991        2. The argument will be passed through to subsequent phases of CM
1992           processing without "going native".  In particular, if the argument
1993           was an anchored path, then "make" will not lose track of that anchor.
1994    
1995    * Compiler backends now "know" their respective C calling conventions
1996      instead of having to be told about it by ml-nlffigen.  This relieves
1997      ml-nlffigen from one of its burdens.
1998    
1999    * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
2000    
2001    * Export C_DEBUG and C_Debug from $c/c.cm.
2002    
2003    * C type encoding in ml-nlffi-lib has been improved to model the conceptual
2004      subtyping relationship between incomplete pointers and their complete
2005      counterparts.  For this, ('t, 'c) ptr has been changed to 'o ptr --
2006      with the convention of instantiating 'o with ('t, 'c) obj whenever
2007      the pointer target type is complete.  In the incomplete case, 'o
2008      will be instantiated with some "'c iobj" -- a type obtained by
2009      using one of the functors PointerToIncompleteType or PointerToCompleteType.
2010    
2011      Operations that work on both incomplete and complete pointer types are
2012      typed as taking an 'o ptr while operations that require the target to
2013      be known are typed as taking some ('t, 'c) obj ptr.
2014    
2015      voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
2016      where void is an eqtype without any values.  This makes it possible
2017      to work on voidptr values using functions meant to operate on light
2018      incomplete pointers.
2019    
2020    * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
2021      been vastly simplified.
2022    
2023    ----------------------------------------------------------------------
2024    Name: Matthias Blume
2025    Date: 2002/02/19 10:48:00 EST
2026    Tag: blume-20020219-pqfix
2027    Description:
2028    
2029    Applied Chris Okasaki's bug fix for priority queues.
2030    
2031    ----------------------------------------------------------------------
2032    Name: Matthias Blume
2033    Date: 2002/02/15 17:05:00
2034    Tag: Release_110_39
2035    Description:
2036    
2037    Last-minute retagging is becoming a tradition... :-(
2038    
2039    This is the working release 110.39.
2040    
2041    ----------------------------------------------------------------------
2042    Name: Matthias Blume
2043    Date: 2002/02/15 16:00:00 EST
2044    Tag: Release_110_39-orig
2045    Description:
2046    
2047    Working release 110.39.  New bootfiles.
2048    
2049    (Update: There was a small bug in the installer so it wouldn't work
2050    with all shells.  So I retagged. -Matthias)
2051    
2052    ----------------------------------------------------------------------
2053    Name: Matthias Blume
2054    Date: 2002/02/15 14:17:00 EST
2055    Tag: blume-20020215-showbindings
2056    Description:
2057    
2058    Added EnvRef.listBoundSymbols and CM.State.showBindings.  Especially
2059    the latter can be useful for exploring what bindings are available at
2060    the interactive prompt.  (The first function returns only the list
2061    of symbols that are really bound, the second prints those but also the
2062    ones that CM's autoloading mechanism knows about.)
2063    
2064    ----------------------------------------------------------------------
2065    Name: Matthias Blume
2066    Date: 2002/02/15 12:08:00 EST
2067    Tag: blume-20020215-iptrs
2068    Description:
2069    
2070    Two improvements to ml-nlffigen:
2071    
2072      1. Write files only if they do not exist or if their current contents
2073         do not coincide with what's being written.  (That is, avoid messing
2074         with the time stamps unless absolutely necessary.)
2075    
2076      2. Implement a "repository" mechanism for generated files related
2077         to "incomplete pointer types".   See the README file for details.
2078    
2079    ----------------------------------------------------------------------
2080    Name: Matthias Blume
2081    Date: 2002/02/14 11:50:00 EST
2082    Tag: blume-20020214-quote
2083    Description:
2084    
2085    Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm).  This is required
2086    because of the new and improved tag generation scheme.  (Thanks to Allen
2087    Leung for pointing it out.)
2088    
2089    ----------------------------------------------------------------------
2090    Name: Lal George
2091    Date: 2002/02/14 09:55:27 EST 2002
2092    Tag: george-20020214-isabelle-bug
2093    Description:
2094    
2095    Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
2096    of Isabelle on the x86.
2097    
2098    From Allen:
2099    -----------
2100     I've found the problem:
2101    
2102         in ra-core.sml, I use the counter "blocked" to keep track of the
2103         true number of elements in the freeze queue.  When the counter goes
2104         to zero, I skip examining the queue.  But I've messed up the
2105         bookkeeping in combine():
2106    
2107             else ();
2108             case !ucol of
2109               PSEUDO => (if !cntv > 0 then
2110                     (if !cntu > 0 then blocked := !blocked - 1 else ();
2111                                        ^^^^^^^^^^^^^^^^^^^^^^^
2112                      moveu := mergeMoveList(!movev, !moveu)
2113                     )
2114                  else ();
2115    
2116         combine() is called to coalesce two nodes u and v.
2117         I think I was thinking that if the move counts of u and v are both
2118         greater than zero then after they are coalesced then one node is
2119         removed from the freeze queue.  Apparently I was thinking that
2120         both u and v are of low degree, but that's clearly not necessarily true.
2121    
2122    
2123    02/12/2002:
2124        Here's the patch.  HOL now compiles.
2125    
2126        I don't know how this impact on performance (compile
2127        time or runtime).  This bug caused the RA (especially on the x86)
2128        to go thru the potential spill phase when there are still nodes on the
2129        freeze queue.
2130    
2131    
2132    
2133    
2134    ----------------------------------------------------------------------
2135    Name: Matthias Blume
2136    Date: 2002/02/13 22:40:00 EST
2137    Tag: blume-20020213-fptr-rtti
2138    Description:
2139    
2140    Fixed a bug in ml-nlffigen that was introduced with one of the previous
2141    updates.
2142    
2143    ----------------------------------------------------------------------
2144  Name: Matthias Blume  Name: Matthias Blume
2145  Date: 2002/02/13 16:41:00 EST  Date: 2002/02/13 16:41:00 EST
2146  Tag: blume-20020213-cmlpq  Tag: blume-20020213-cmlpq

Legend:
Removed from v.1063  
changed lines
  Added in v.1455

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0