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revision 624, Fri Apr 21 03:06:21 2000 UTC revision 1048, Thu Jan 31 06:36:17 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Allen Leung
17    Date: 2002/01/30
18    Tag: leunga-20020130-nowhere-bug-fix
19    Description:
20    
21       MLRISC bug fixes:
22       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
23       2. MachineInt.fromString was negating its value.
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume
27    Date: 2002/01/29
28    Tag: blume-20020129-INSTALL
29    Description:
30    
31    - Added somewhat detailed installation instructions (file INSTALL).
32    - Fixed curl-detection bug in config/install.sh.
33    - It is now possible to select the URL getter using the URLGETTER
34      environment variable:
35    
36          not set / "unknown"      --> automatic detection (script tries wget,
37                                       curl, and lynx)
38          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
39                                       how to properly invoke them)
40          other                    --> use $URLGETTER directly, it must take
41                                       precisely two command-line arguments
42                                       (source URL and destination file name)
43    
44    ----------------------------------------------------------------------
45    Name: Matthias Blume
46    Date: 2002/01/28
47    Tag: blume-20020128-sparc-ccalls
48    Description:
49    
50    - Fixed problem with calculation of "used" registers in sparc-c-calls.
51    - Make use of the allocParam argument in sparc-c-calls.
52    
53    ----------------------------------------------------------------------
54    Name: Matthias Blume
55    Date: 2002/01/28
56    Tag: blume-20020128-allocParam
57    Description:
58    
59    John Reppy:  Changes c-calls API to accept client-callback for
60    allocating extra stack space.
61    me: Corresponding changes to mlriscGen (using a dummy argument that
62        does not change the current behavior).
63    
64    ----------------------------------------------------------------------
65    Name: Matthias Blume
66    Date: 2002/01/28 12:00:00
67    Tag: Release_110_38
68    Description:
69    
70    This time for real!!!
71    
72    ----------------------------------------------------------------------
73    Name: Matthias Blume
74    Date: 2002/01/28 10:56:00 EST
75    Tag: blume-20020128-retraction
76    Description:
77    
78    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
79       with blume-Release_110_38-retracted.)
80    
81    1. Fixed a problem with incorrect rounding modes in real64.sml.
82       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
83    
84    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
85       and enums fixed.  The naming of corresponding ML identifiers should
86       now be consistent again.
87    
88    ----------------------------------------------------------------------
89    Name: Allen Leung
90    Date: 2002/01/27
91    Tag: leunga-20020127-nowhere
92    Description:
93    
94       Added a target called nowhere in the configuration scripts.
95       Enabling this will build the MLRISC 'nowhere' tool (for translating
96       programs with where-clauses into legal SML code) during installation.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2002/01/25 21:27:00 EST
101    Tag: blume-Release_110_38-retracted
102    Description:
103    
104    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
105    
106    README will be added later.
107    
108    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
109    (Release_110_38) removed.  Reason: Last-minute bug fixes.
110    
111    ----------------------------------------------------------------------
112    Name: Matthias Blume
113    Date: 2002/01/25
114    Tag: blume-20020125-ffi
115    Description:
116    
117    A large number of tweaks and improvements to ml-nlffi-lib and
118    ml-nlffigen:
119    
120       - ML represenation types have been streamlined
121       - getter and setter functions work with concrete values, not abstract
122         ones where possible
123       - ml-nlffigen command line more flexible (see README file there)
124       - some bugs have been fixed (hopefully)
125    
126    ----------------------------------------------------------------------
127    Name: Lal George
128    Date: 2002/01/24
129    Tag: george-20020124-risc-ra-interface
130    Description:
131    
132       There is a dramatic simplification in the interface to the
133       register allocator for RISC architectures as a result of making
134       parallel copy instructions explicit.
135    
136    ----------------------------------------------------------------------
137    Name: Matthias Blume
138    Date: 2002/01/22
139    Tag: blume-20020122-x86-ccalls
140    Description:
141    
142    Bug fix for c-calls on x86 (having to do with how char- and
143    short-arguments are being handled).
144    
145    ----------------------------------------------------------------------
146    Name: Matthias Blume
147    Date: 2002/01/21
148    Tag: blume-20020121-ff
149    Description:
150    
151    Another day of fiddling with the FFI...
152    
153    1. Bug fix/workaround:  CKIT does not complain about negative array
154       dimensions, so ml-nlffigen has to guard itself against this possibility.
155       (Otherwise a negative dimension would send it into an infinite loop.)
156    
157    2. Some of the abstract types (light objects, light pointers, most "base"
158       types) in structure C are now eqtypes.
159    
160    3. Added constructors and test functions for NULL function pointers.
161    
162    ----------------------------------------------------------------------
163    Name: Matthias Blume
164    Date: 2002/01/18
165    Tag: blume-20020118-ready-for-new-release
166    Description:
167    
168    Made config/srcarchiveurl point to a new place.  (Will provide boot
169    files shortly.)
170    
171    Maybe we christen this to be 110.38?
172    
173    ----------------------------------------------------------------------
174    Name: Matthias Blume
175    Date: 2002/01/18
176    Tag: blume-20020118-more-ffifiddle
177    Description:
178    
179    Today's FFI fiddling:
180    
181      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
182        C.Set.* that use concrete (MLRep.*) arguments and results instead
183        of abstract ones.
184    
185      - Provided word-style bit operations etc. for "int" representation
186        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
187        and Long.
188    
189    ----------------------------------------------------------------------
190    Name: Matthias Blume
191    Date: 2002/01/18
192    Tag: blume-20020118-use-x86-fp
193    Description:
194    
195    Now that x86-fast-fp seems to be working, I turned it back on again
196    by default.  (Seems to work fine now, even with the FFI.)
197    
198    Other than that, I added some documentation about the FFI to
199    src/ml-nlffigen/README and updated the FFI test examples in
200    src/ml-nlffi-lib/Tests/*.
201    
202    ----------------------------------------------------------------------
203    Name: Allen Leung
204    Date: 2002/01/17
205    Tag: leunga-20020117-x86-fast-fp-call
206    Description:
207    
208       1. Fixed a problem with handling return fp values when x86's fast fp
209          mode is turned on.
210    
211       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
212          of %f32.
213    
214       3. Added a constructor INT32lit to the ast of MLRISC tools.
215    
216    ----------------------------------------------------------------------
217    Name: Matthias Blume
218    Date: 2002/01/16
219    Tag: blume-20020116-ffifiddle
220    Description:
221    
222    More fiddling with the FFI interface:
223    
224     - Make constness 'c instead of rw wherever possible.  This eliminates
225       the need for certain explicit coercions.  (However, due to ML's
226       value polymorphism, there will still be many cases where explicit
227       coercions are necessary.  Phantom types are not the whole answer
228       to modeling a subtyping relationship in ML.)
229    
230     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
231    
232     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
233       clumsy workaround for varargs problem.)
234    
235    ----------------------------------------------------------------------
236    Name: Lal George
237    Date: 2002/01/15
238    Tag: <none>
239    Description:
240    
241    1. Since COPY instructions are no longer native to the architecture,
242       a generic functor can be used to implement the expandCopies function.
243    
244    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
245       TEXT segment.
246    
247    ----------------------------------------------------------------------
248    Name: Matthias Blume
249    Date: 2002/01/15
250    Tag: blume-20020115-ffiupdates
251    Description:
252    
253    1. Fix for bug resulting in single-precision float values being returned
254       incorrectly from FFI calls.
255    
256    2. Small modifications to C FFI API:
257    
258        - memory-allocation routines return straight objects (no options)
259          and raise an exception in out-of-memory situations
260        - unsafe extensions to cast between function pointers and pointers
261          from/to ints
262        - added structure C_Debug as an alternative to structure C where
263          pointer-dereferencing (|*| and |*!) always check for null-pointers
264        - added open_lib' to DynLinkage;  open_lib' works like open_lib
265          but also takes a (possibly empty) list of existing library handles
266          that the current library depends on
267    
268    ----------------------------------------------------------------------
269    Name: Matthias Blume
270    Date: 2002/01/10
271    Tag: blume-20020110-newffigen
272    Description:
273    
274    1. Updates to portable graph code.
275    
276    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
277       more scalable now so that even huge interfaces such as the one
278       for GTK compile in finite time and space. :-)
279       See src/ml-nlffigen/README for details on what's new.
280    
281    ----------------------------------------------------------------------
282    Name: Lal George
283    Date: 2001/01/09 14:31:35 EST 2002
284    Tag: george-20011206-rm-native-copy
285    Description:
286    
287            Removed the native COPY and FCOPY instructions
288            from all the architectures and replaced it with the
289            explicit COPY instruction from the previous commit.
290    
291            It is now possible to simplify many of the optimizations
292            modules that manipulate copies. This has not been
293            done in this change.
294    
295    ----------------------------------------------------------------------
296    Name: Lal George
297    Date: 2001/12/06 16:50:13 EST 2001
298    Tag: george-20011206-mlrisc-instruction
299    Description:
300    
301    Changed the representation of instructions from being fully abstract
302    to being partially concrete. That is to say:
303    
304      from
305            type instruction
306    
307      to
308            type instr                              (* machine instruction *)
309    
310            datatype instruction =
311                LIVE of {regs: C.cellset, spilled: C.cellset}
312              | KILL of {regs: C.cellset, spilled: C.cellset}
313              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
314              | ANNOTATION of {i: instruction, a: Annotations.annotation}
315              | INSTR of instr
316    
317    This makes the handling of certain special instructions that appear on
318    all architectures easier and uniform.
319    
320    LIVE and KILL say that a list of registers are live or killed at the
321    program point where they appear. No spill code is generated when an
322    element of the 'regs' field is spilled, but the register is moved to
323    the 'spilled' (which is present, more for debugging than anything else).
324    
325    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
326    We used to generate:
327    
328            DEFFREG f1
329            f1 := f2 + f3
330            trapb
331    
332    but now generate:
333    
334            f1 := f2 + f3
335            trapb
336            LIVE {regs=[f1,f2,f3], spilled=[]}
337    
338    Furthermore, the DEFFREG (hack) required that all floating point instruction
339    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
340    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
341    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
342    this architecture).
343    
344    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
345    all the architectures. This will result in further simplification of the
346    register allocator that must be aware of them for coalescing purposes, and
347    will also simplify certain aspects of the machine description that provides
348    callbacks related to parallel copies.
349    
350    ANNOTATION should be obvious, and now INSTR represents the honest to God
351    machine instruction set!
352    
353    The <arch>/instructions/<arch>Instr.sml files define certain utility
354    functions for making porting easier -- essentially converting upper case
355    to lower case. All machine instructions (of type instr) are in upper case,
356    and the lower case form generates an MLRISC instruction. For example on
357    the alpha we have:
358    
359      datatype instr =
360         LDA of {r:cell, b:cell, d:operand}
361       | ...
362    
363      val lda : {r:cell, b:cell, d:operand} -> instruction
364        ...
365    
366    where lda is just (INSTR o LDA), etc.
367    
368    ----------------------------------------------------------------------
369    Name: Matthias Blume
370    Date: 2001/11/22 21:40:00 EST
371    Tag: Release_110_37
372    Description:
373    
374    Release 110.37.  This time for real.
375    
376    ----------------------------------------------------------------------
377    Name: Matthias Blume
378    Date: 2001/11/21 16:35:00 EST
379    Tag: blume-20011121-foot-in-mouth
380    Description:
381    
382    Removed the "Release_110_37" tag because of a serious bug.
383    This will be re-tagged once the bug is fixed.
384    
385    ----------------------------------------------------------------------
386    Name: Matthias Blume
387    Date: 2001/11/21 16:14:00 EST
388    Tag: blume-20011121-forgottenfile
389    Description:
390    
391    Forgot to add a file.  (Just a .tex-file -- part of
392    the CM manual source.)
393    
394    ----------------------------------------------------------------------
395    Name: Matthias Blume
396    Date: 2001/11/21 16:10:00 EST
397    Tag: blume-20011121-invalid_110_37
398    Description:
399    
400    Note: I removed the original tag "Release_110_37" from this commit
401          because we found a serious bug in all non-x86 backends.
402          - Matthias
403    
404    1. Modifications to the SML/NJ code generator and to the runtime system
405       so that code object name strings are directly inserted into code
406       objects at code generation time.  The only business the runtime system
407       has with this is now to read the name strings on occasions.
408       (The encoding of the name string has also changed somewhat.)
409    
410    2. CM now implements a simple "set calculus" for specifying export lists.
411       In particular, it is now possible to refer to the export lists of
412       other libraries/groups/sources and form unions as well as differences.
413       See the latest CM manual for details.
414    
415    3. An separate notion of "proxy" libraries has again be eliminated from
416       CM's model.  (Proxy libraries are now simply a special case of using
417       the export list calculus.)
418    
419    4. Some of the existing libraries now take advantage of the new set
420       calculus.
421       (Notice that not all libraries have been converted because some
422       of the existing .cm-files are supposed to be backward compatible
423       with 110.0.x.)
424    
425    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
426       "General.exnMessage"!  The former relies on a certain hook to be
427       initialized, and that often does not happen in the stand-alone case.)
428    
429    ----------------------------------------------------------------------
430    Name: Lal George
431    Date: 2001/11/21  13:56:18 EST
432    Tag: george-2001121-pseudo-ops
433    Description:
434    
435      Implemented a complete redesign of MLRISC pseudo-ops. Now there
436      ought to never be any question of incompatabilities with
437      pseudo-op syntax expected by host assemblers.
438    
439      For now, only modules supporting GAS syntax are implemented
440      but more should follow, such as MASM, and vendor assembler
441      syntax, e.g. IBM as, Sun as, etc.
442    
443    ----------------------------------------------------------------------
444    Name: Matthias Blume
445    Date: 2001/11/14 11:52:00 EST
446    Tag: blume-20011114-srcname
447    Description:
448    
449    1. Routed the name of the current source file to mlriscgen where it
450       should be directly emitted into the code object.  (This last part
451       is yet to be done.)
452    
453    2. Some cleanup of the pgraph code to make it match the proposal that
454       I put out the other day.  (The proposal notwithstanding, things are
455       still in flux here.)
456    
457    ----------------------------------------------------------------------
458    Name: Lal George
459    Date: 2001/11/14 09:44:04 EST
460    Tag:
461    Description:
462    
463      Fix for a backpatching bug reported by Allen.
464    
465      Because the boundary between short and long span-dependent
466      instructions is +/- 128, there are an astounding number of
467      span-dependent instructions whose size is over estimated.
468    
469      Allen came up with the idea of letting the size of span
470      dependent instructions be non-monotonic, for a maxIter
471      number of times, after which the size must be monotonically
472      increasing.
473    
474      This table shows the number of span-dependent instructions
475      whose size was over-estimated as a function of maxIter, for the
476      file Parse/parse/ml.grm.sml:
477    
478         maxIter            # of instructions:
479            10                      687
480            20                      438
481            30                      198
482            40                        0
483    
484      In compiling the compiler, there is no significant difference in
485      compilation speed between maxIter=10 and maxIter=40. Actually,
486      my measurements showed that maxIter=40 was a tad faster than
487      maxIter=10! Also 96% of the  files in the compiler reach a fix
488      point within 13 iterations, so fixing maxIter at 40, while high,
489      is okay.
490    
491    ----------------------------------------------------------------------
492    Name: Matthias Blume
493    Date: 2001/10/31 15:25:00 EST
494    Tag: blume-20011031-pgraph
495    Description:
496    
497    CKIT:
498    * Changed the "Function" constructor of type Ast.ctype to carry optional
499      argument identifiers.
500    * Changed the return type of TypeUtil.getFunction accordingly.
501    * Type equality ignores the argument names.
502    * TypeUtil.composite tries to preserve argument names but gives up quickly
503      if there is a mismatch.
504    
505    installation script:
506    * attempts to use "curl" if available (unless "wget" is available as well)
507    
508    CM:
509    * has an experimental implementation of "portable graphs" which I will
510      soon propose as an implementation-independent library format
511    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
512    
513    NLFFI-LIB:
514    * some cleanup (all cosmetic)
515    
516    NLFFIGEN:
517    * temporarily disabled the mechanism that suppresses ML output for
518      C definitions whose identifiers start with an underscore character
519    * generate val bindings for enum constants
520    * user can request that only one style (light or heavy) is being used;
521      default is to use both (command-line arguments: -heavy and -light)
522    * fixed bug in handling of function types involving incomplete pointers
523    * generate ML entry points that take record arguments (i.e., using
524      named arguments) for C functions that have a prototype with named
525      arguments
526      (see changes to CKIT)
527    
528    ----------------------------------------------------------------------
529    Name: Allen Leung
530    Date: 2001/10/27 20:34:00 EDT
531    Tag: leunga-20011027-x86-fast-fp-call
532    Description:
533    
534       Fixed the bug described in blume-20010920-slowfp.
535    
536       The fix involves
537          1. generating FCOPYs in FSTP in ia32-svid
538          2. marking a CALL with the appropriate annotation
539    
540    ----------------------------------------------------------------------
541    Name: Matthias Blume
542    Date: 2001/10/16 11:32:00 EDT
543    Tag: blume-20011016-netbsd
544    Description:
545    
546    Underscore patch from Chris Richards (fixing problem with compiling
547    runtime system under recent NetBSD).
548    
549    ----------------------------------------------------------------------
550    Name: Allen Leung
551    Date: 2001/10/12 17:18:32 EDT 2001
552    Tag: leung-20011012-x86-printflowgraph
553    Description:
554    
555    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
556    
557    ----------------------------------------------------------------------
558    Name: Lal George
559    Date: 2001/10/11 23:51:34 EDT
560    Tag: george-20011011-too-many-instrs
561    Description:
562    
563    The representation of a program point never expected to see more
564    than 65536 instructions in a basic block!
565    
566    ----------------------------------------------------------------------
567    Name: Lal George
568    Date: 2001/10/09 09:41:37 EDT
569    Tag: george-20011008-mlrisc-labels
570    Description:
571    
572    Changed the machine description files to support printing of
573    local and global labels in assembly code, based on host assembler
574    conventions.
575    
576    ----------------------------------------------------------------------
577    Name: Matthias Blume
578    Date: 2001/09/25 15:25:00 EDT
579    Tag: blume-20010925-exninfo
580    Description:
581    
582    I provided a non-hook implementation of exnName (at the toplevel) and
583    made the "dummy" implementation of exnMessage (at the toplevel) more
584    useful: if nothing gets "hooked in", then at least you are going to
585    see the exception name and a message indicating why you don't see more.
586    
587    [For the time being, programs that need exnMessage and want to use
588    ml-build should either use General.exnMessage (strongly recommended) or
589    refer to structure General at some other point so that CM sees a
590    static dependency.]
591    
592    [Similar remarks go for "print" and "use":  If you want to use their
593    functionality in stand-alone programs generated by ml-build, then use
594    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
595    
596    ----------------------------------------------------------------------
597    Name: Matthias Blume
598    Date: 2001/09/20 17:28:00 EDT
599    Tag: blume-20010920-slowfp
600    Description:
601    
602    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
603    
604    ----------------------------------------------------------------------
605    Name: Matthias Blume
606    Date: 2001/09/20 17:20:00 EDT
607    Tag: blume-20010920-canonicalpaths
608    Description:
609    
610    0. Updated the BOOT file (something that I forgot to do earlier).
611    
612    1. Small internal change to CM so that it avoids "/../" in filenames
613       as much as possible (but only where it is safe).
614    
615    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
616       that arguments that contain delimiters are passed through correctly.
617       This change also means that all "special" arguments of the form
618       @SMLxxx... must come first.
619    
620    3. Changed install script to put relative anchor names for tool commands
621       into pathconfig.
622    
623    ----------------------------------------------------------------------
624    Name: Matthias Blume
625    >>>>>>> 1.169
626    Date: 2001/09/18 15:35:00 EDT
627    Tag: blume-20010918-readme11036
628    Description:
629    
630    Added README files.
631    
632    ----------------------------------------------------------------------
633    Name: Matthias Blume
634    Date: 2001/09/18 11:45:00 EDT
635    Tag: Release_110_36 (retag)
636    Description:
637    
638    Fixed mistake in config/preloads. Retagged as 110.36.
639    
640    ----------------------------------------------------------------------
641    Name: Matthias Blume
642    Date: 2001/09/18 09:40:00 EDT
643    Tag: Release_110_36_orig (tag changed)
644    Description:
645    
646    New version (110.36).  New bootfiles.
647    
648    ----------------------------------------------------------------------
649    Name: Matthias Blume
650    Date: 2001/09/14 16:15:00 EDT
651    Tag: blume-20010914-x86fastfp
652    Description:
653    
654    John committed some changes that Allen made, in particular a (hopefully)
655    correctly working version of the x86-fp module.
656    
657    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
658    flag to "true".  Everything seems to compile to a fixpoint ok, and
659    "mandelbrot" speeds up by about 15%.
660    
661    ----------------------------------------------------------------------
662    Name: Matthias Blume
663    Date: 2001/09/13 11:20:00 EDT
664    Tag: blume-20010913-minimal
665    Description:
666    
667    1. Stefan Monnier's patch to fix a miscompilation problem that
668       was brought to light by John Reppy's work on Moby.
669    
670    2. Implemented a minimal "structure Compiler" that contains just
671       "version" and "architecture".  The minimal version will be
672       available when the full version is not.  This is for backward-
673       compatibility with code that wants to test Compiler.version.
674    
675    ----------------------------------------------------------------------
676    Name: Matthias Blume
677    Date: 2001/08/28 14:03:00 EDT
678    Tag: blume-20010828-ml-lex
679    Description:
680    
681    Fix for bug 1581, received from Neophytos Michael.
682    
683    ----------------------------------------------------------------------
684    Name: Matthias Blume
685    Date: 2001/08/27 11:20:00 EDT
686    Tag: blume-20010827-readme11035
687    Description:
688    
689    Fleshed out the README file for 110.35.
690    
691    ----------------------------------------------------------------------
692    Name: Matthias Blume
693    Date: 2001/08/24 17:10:00 EDT
694    Tag: Release_110_35
695    Description:
696    
697    New version number (110.35).  New bootfiles.
698    
699    ----------------------------------------------------------------------
700    Name: Lal George
701    Date: 2001/08/24 13:47:18 EDT 2001
702    Tag: george-20010824-MLRISC-graphs
703    Description:
704    
705     removed clusters from MLRISC completely and replaced with graphs.
706    
707    ----------------------------------------------------------------------
708    Name: Matthias Blume
709    Date: 2001/08/23 17:50:00 EDT
710    Tag: blume-20010823-toplevel
711    Description:
712    
713    - some reorganization of the code that implements various kinds of
714      environments in the compiler (static, dynamic, symbolic, combined)
715    - re-implemented the EnvRef module so that evalStream works properly
716      (if the stream contains references to "use", "CM.make", etc.)
717    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
718    
719    ----------------------------------------------------------------------
720    Name: Matthias Blume
721    Date: 2001/08/20 15:50 EDT
722    Tag: blume20010820-slipup
723    Description:
724    
725    I forgot to commit a few files.  Here they are...
726    
727    ----------------------------------------------------------------------
728    Name: Matthias Blume
729    Date: 2001/08/20 15:35:00 EDT
730    Tag: blume-20010820-debugprof
731    Description:
732    
733    !!!! NEW BOOTFILES !!!!
734    
735    This is another round of reorganizing the compiler sources.  This
736    time the main goal was to factor out all the "instrumentation"
737    passes (for profiling and backtracing) into their own library.
738    The difficulty was to do it in such a way that it does not depend
739    on elaborate.cm but only on elabdata.cm.
740    
741    Therefore there have been further changes to both elaborate.cm and
742    elabdata.cm -- more "generic" things have been moved from the former
743    to the latter.  As a result, I was forced to split the assignment
744    of numbers indicating "primtyc"s into two portions: SML-generic and
745    SML/NJ-specific.  Since it would have been awkward to maintain,
746    I bit the bullet and actually _changed_ the mapping between these
747    numbers and primtycs.  The bottom line of this is that you need
748    a new set of bin- and bootfiles.
749    
750    I have built new bootfiles for all architectures, so doing a fresh
751    checkout and config/install.sh should be all you need.
752    
753    The newly created library's name is
754    
755        $smlnj/viscomp/debugprof.cm
756    
757    and its sources live under
758    
759        src/compiler/DebugProf
760    
761    ----------------------------------------------------------------------
762    Name: Matthias Blume
763    Date: 2001/08/15 17:15:00 EDT
764    Tag: blume-20010815-compreorg
765    Description:
766    
767    This is a first cut at reorganizing the CM libraries that make up the
768    core of the compiler.  The idea is to separate out pieces that could
769    be used independently by tools, e.g., the parser, the typechecker, etc.
770    
771    The current status is a step in this direction, but it is not quite
772    satisfactory yet.  Expect more changes in the future.
773    
774    Here is the current (new) organization...
775    
776        What used to be $smlnj/viscomp/core.cm is now divided into
777        six CM libraries:
778    
779             $smlnj/viscomp/basics.cm
780                           /parser.cm
781                           /elabdata.cm
782                           /elaborate.cm
783                           /execute.cm
784                           /core.cm
785    
786        The CM files for these libraries live under src/system/smlnj/viscomp.
787        All these libraries are proxy libraries that contain precisely
788        one CM library component.  Here are the locations of the components
789        (all within the src/compiler tree):
790    
791             Basics/basics.cm
792             Parse/parser.cm
793             ElabData/elabdata.cm
794             Elaborator/elaborate.cm
795             Execution/execute.cm
796             core.cm
797    
798         [This organization is the same that has been used already
799         for a while for the architecture-specific parts of the visible
800         compiler and for the old version of core.cm.]
801    
802         As you will notice, many source files have been moved from their
803         respective original locations to a new home in one of the above
804         subtrees.
805    
806         The division of labor between the new libraries is the following:
807    
808             basics.cm:
809                - Simple, basic definitions that pertain to many (or all) of
810                  the other libraries.
811             parser.cm:
812                - The SML parser, producing output of type Ast.dec.
813                - The type family for Ast is also defined and exported here.
814             elabdata.cm:
815                - The datatypes that describe input and output of the elaborator.
816                  This includes types, absyn, and static environments.
817             elaborator.cm:
818                - The SML/NJ type checker and elaborator.
819                  This maps an Ast.dec (with a given static environment) to
820                  an Absyn.dec (with a new static environment).
821                - This libraries implements certain modules that used to be
822                  structures as functors (to remove dependencies on FLINT).
823             execute.cm:
824                - Everything having to do with executing binary code objects.
825                - Dynamic environments.
826             core.cm:
827                - SML/NJ-specific instantiations of the elaborator and MLRISC.
828                - Top-level modules.
829                - FLINT (this should eventually become its own library)
830    
831    Notes:
832    
833    I am not 100% happy with the way I separated the elaborator (and its
834    data structures) from FLINT.  Two instances of the same problem:
835    
836        1. Data structures contain certain fields that carry FLINT-specific
837           information.  I hacked around this using exn and the property list
838           module from smlnj-lib.  But the fact that there are middle-end
839           specific fields around at all is a bit annoying.
840    
841        2. The elaborator calculates certain FLINT-related information.  I tried
842           to make this as abstract as I could using functorization, but, again,
843           the fact that the elaborator has to perform calculations on behalf
844           of the middle-end at all is not nice.
845    
846        3. Having to used exn and property lists is unfortunate because it
847           weakens type checking.  The other alternative (parameterizing
848           nearly *everything*) is not appealing, though.
849    
850    I removed the "rebinding =" warning hack because due to the new organization
851    it was awkward to maintain it.  As a result, the compiler now issues some of
852    these warnings when compiling init.cmi during bootstrap compilation. On
853    the plus side, you also get a warning when you do, for example:
854       val op = = Int32.+
855    which was not the case up to now.
856    
857    I placed "assign" and "deref" into the _Core structure so that the
858    code that deals with the "lazy" keyword can find them there.  This
859    removes the need for having access to the primitive environment
860    during elaboration.
861    
862    ----------------------------------------------------------------------
863    Name: Matthias Blume
864    Date: 2001/08/13
865    Tag: blume-20010813-closures
866    Description:
867    
868    This fix was sent to us by Zhong Shao.  It is supposed to improve the
869    performance of certain loops by avoiding needless closure allocation.
870    
871    ----------------------------------------------------------------------
872    Name: Lal George
873    Date: 2001/07/31 10:03:23 EDT 2001
874    Tag: george-20010731-x86-fmalloc
875    Description: Fixed bug in x86 calls
876    
877        There was a bug where call instructions would mysteriously
878        vanish. The call instruction had to be one that returned
879        a floating point value.
880    
881    ----------------------------------------------------------------------
882    Name: Lal George
883    Date: 2001/07/19 16:36:29 EDT 2001
884    Tag: george-20010719-simple-cells
885    Description:
886    
887    I have dramatically simplified the interface for CELLS in MLRISC.
888    
889    In summary, the cells interface is broken up into three parts:
890    
891      1. CellsBasis : CELLS_BASIS
892    
893            CellsBasis is a top level structure and common for all
894            architectures.  it contains the definitions of basic datatypes
895            and utility  functions over these types.
896    
897      2. functor Cells() : CELLS
898    
899            Cells generates an interface for CELLS that incorporates the
900            specific resources on the target architecture, such as the
901            presence of special register classes, their number and size,
902            and various useful substructures.
903    
904      3. <ARCH>CELLS
905    
906            e.g. SparcCells: SPARCCELLS
907    
908            <ARCH>CELLS usually contains additional bindings for special
909            registers  on the architecture, such as:
910    
911                    val r0 : cell           (* register zero *)
912                    val y : cell            (* Y register *)
913                    val psr : cell          (* processor status register *)
914                    ...
915    
916            The structure returned by applying the Cells functor is opened
917            in this interface.
918    
919    The main implication of all this is that the datatypes for cells is
920    split between CellsBasis and CELLS -- a fairly simple change for user
921    code.
922    
923    In the old scheme the CELLS interface had a definitional binding of
924    the form:
925    
926            signature CELLS = sig
927    
928               structure CellsBasis = CellsBasis
929    
930               ...
931    
932            end
933    
934    With all the sharing constraints that goes on in MLRISC, this old
935    design  quickly leads to errors such as:
936    
937            "structure definition spec inside of sharing ... "
938    
939    
940    and appears to require an unacceptable amount of sharing and where
941    constraint hackery.
942    
943    I think this error message (the interaction of definitional specs and
944    sharing) requires more explanation on our web page.
945    
946    ----------------------------------------------------------------------
947    Name: Matthias Blume
948    Date: 2001/07/19 15:00:00 EDT
949    Tag: blume-20010719-libreorg
950    Description:
951    
952    This update puts together a fairly extensive but straightforward change
953    to the way the libraries that implement the interactive system are
954    organized:
955    
956       The biggest change is the elimination of structure Compiler.  As a
957       replacement for this structure, there is now a CM library
958       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
959       that exports all the substructures of the original structure Compiler
960       directly.  So instead of saying Compiler.Foo.bar one now simply
961       says Foo.bar.  (The CM libraries actually export a collection of
962       structures that is richer than the collection of substructures of
963       structure Compiler.)
964    
965       To make the transition smooth, there is a separate library called
966       $smlnj/compiler/compiler.cm which puts together and exports the
967       original structure Compiler (or at least something very close to it).
968    
969       There are five members of the original structure Compiler
970       that are not exported directly but which instead became members
971       of a new structure Backend (described by signature BACKEND).  These are:
972       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
973       Interact (: INTERACT), structure Machine (: MACHINE), and val
974       architecture (: string).
975    
976       Structure Compiler.Version has become structure CompilerVersion.
977    
978       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
979       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
980       or x86, respectively.
981       Each of these exports the same frontend structures that
982       $smlnj/compiler.cm exports.  But they do not have a structure Backend
983       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
984       Hppa, PPC, Sparc, or X86, respectively.
985    
986       Library $smlnj/compiler/all.cm exports the union of the exports of
987       $smlnj/compiler/<arch>.cm
988    
989       There are no structures <Arch>Compiler anymore, use
990       $smlnj/compiler/<arch>.cm instead.
991    
992       Library host-compiler-0.cm is gone.  Instead, the internal library
993       that instantiates CM is now called cm0.cm.  Selection of the host
994       compiler (backend) is no longer done here but. (Responsibility for it
995       now lies with $smlnj/compiler/current.cm.  This seems to be more
996       logical.)
997    
998       Many individual files have been moved or renamed.  Some files have
999       been split into multiple files, and some "dead" files have been deleted.
1000    
1001    Aside from these changes to library organization, there are also changes
1002    to the way the code itself is organized:
1003    
1004       Structure Binfile has been re-implemented in such a way that it no
1005       longer needs any knowledge of the compiler.  It exclusively deals
1006       with the details of binfile layout.  It no longer invokes the
1007       compiler (for the purpose of creating new prospective binfile
1008       content), and it no longer has any knowledge of how to interpret
1009       pickles.
1010    
1011       Structure Compile (: COMPILE) has been stripped down to the bare
1012       essentials of compilation.  It no longer deals with linking/execution.
1013       The interface has been cleaned up considerably.
1014    
1015       Utility routines for dealing with linking and execution have been
1016       moved into their own substructures.
1017    
1018       (The ultimate goal of these changes is to provide a light-weight
1019       binfile loader/linker (at least for, e.g., stable libraries) that
1020       does not require CM or the compiler to be present.)
1021    
1022    CM documentation has been updated to reflect the changes to library
1023    organization.
1024    
1025    ----------------------------------------------------------------------
1026    Name: Matthias Blume
1027    Date: 2001/07/10 17:30:00 EDT
1028    Tag: Release_110_34
1029    Description:
1030    
1031    Minor tweak to 110.34 (re-tagged):
1032    
1033      - README.html file added to CVS repository
1034      - runtime compiles properly under FreeBSD 3.X and 4.X
1035    
1036    ----------------------------------------------------------------------
1037    Name: Matthias Blume
1038    Date: 2001/07/10 17:30:00 EDT
1039    Tag: Release_110_34
1040    Description:
1041    
1042    New version number (110.34). New bootfiles.
1043    
1044    ----------------------------------------------------------------------
1045    Name: Matthias Blume
1046    Date: 2001/07/09 16:00:00 EDT
1047    Tag: blume-20010709-more-varargs
1048    Description:
1049    
1050    I changed the handling of varargs in ml-nlffigen again:
1051    The ellipsis ... will now simply be ignored (with an accompanying warning).
1052    
1053    The immediate effect is that you can actually call a varargs function
1054    from ML -- but you can't actually supply any arguments beyond the ones
1055    specified explicitly.  (For example, you can call printf with its format
1056    string, but you cannot pass additional arguments.)
1057    
1058    This behavior is only marginally more useful than the one before, but
1059    it has the advantage that a function or, more importantly, a function
1060    type never gets dropped on the floor, thus avoiding follow-up problems with
1061    other types that refer to the offending one.
1062    
1063    ----------------------------------------------------------------------
1064    Name: Matthias Blume
1065    Date: 2001/07/09 11:25:00 EDT
1066    Tag: blume-20010709-varargs
1067    Description:
1068    
1069    1. ckit-lib.cm now exports structure Error
1070    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1071       with a warning accompanied by a source location.  Moreover, it
1072       merely skips the offending function or type and proceeds with the
1073       rest of its work.u  As a result, one can safely feed C code containing
1074       "..." to ml-nlffigen.
1075    3. There are some internal improvements to CM, providing slightly
1076       more general string substitutions in the tools subsystem.
1077    
1078    ----------------------------------------------------------------------
1079    Name: Matthias Blume
1080    Date: 2001/06/27 15:10:00 EDT
1081    Tag: blume-20010627-concur
1082    Description:
1083    
1084    Fixed a small bug in CM's handling of parallel compilation.
1085    (You could observe the bug by Control-C-interrupting an ordinary
1086    CMB.make or CM.stabilize and then attaching some compile servers.
1087    The result was that all of a sudden the previously interrupted
1088    compilation would continue on its own.  This was because of
1089    an over-optimization: CM did not bother to clean out certain queues
1090    when no servers were attached "anyway", resulting in the contents
1091    of these queues to grab control when new servers did get attached.)
1092    
1093    There is also another minor update to the CM manual.
1094    
1095    ----------------------------------------------------------------------
1096    Name: Matthias Blume
1097    Date: 2001/06/26 16:15:00 EDT
1098    Tag: blume-20010626-cmdoc
1099    Description:
1100    
1101    Minor typo fixed in CM manual (syntax diagram for libraries).
1102    
1103    ----------------------------------------------------------------------
1104    Name: Matthias Blume
1105    Date: 2001/06/25 22:55:00 EDT
1106    Tag: blume-20010625-x86pc
1107    Description:
1108    
1109    Fixed a nasty bug in the X86 assembly code that caused signal
1110    handlers to fail (crash) randomly.
1111    
1112    ----------------------------------------------------------------------
1113    Name: Matthias Blume
1114    Date: 2001/06/25 12:05:00 EDT
1115    Tag: blume-20010625-nlffigen
1116    Description:
1117    
1118    This update fixes a number of minor bugs in ml-nlffigen as reported by
1119    Nick Carter <nbc@andrew.cmu.edu>.
1120    
1121      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1122      2. Default names for generated files are now derived from the name of
1123         the C file *without its directory*.  In particular, this causes generated
1124         files to be placed locally even if the C file is in some system directory.
1125      3. Default names for generated signatures and structures are also derived
1126         from the C file name without its directory.  This avoids silly things
1127         like "structure GL/GL".
1128         (Other silly names are still possible because ml-nlffigen does not do
1129          a thorough check of whether generated names are legal ML identifiers.
1130          When in doubt, use command line arguments to force particular names.)
1131    
1132    ----------------------------------------------------------------------
1133    Name: Matthias Blume
1134    Date: 2001/06/21 12:25:00 EDT
1135    Tag: blume-20010621-eXene
1136    Description:
1137    
1138    eXene now compiles and (sort of) works again.
1139    
1140    The library name (for version > 110.33) is $/eXene.cm.
1141    
1142    I also added an new example in src/eXene/examples/nbody.  See the
1143    README file there for details.
1144    
1145    ----------------------------------------------------------------------
1146    Name: Matthias Blume
1147    Date: 2001/06/20 16:40:00 EDT
1148    Tag: blume-20010620-cml
1149    Description:
1150    
1151    CML now compiles and works again.
1152    
1153    Libraries (for version > 110.33):
1154    
1155      $cml/cml.cm            Main CML library.
1156      $cml/basis.cm          CML's version of $/basis.cm.
1157      $cml/cml-internal.cm   Internal helper library.
1158      $cml/core-cml.cm       Internal helper library.
1159      $cml-lib/trace-cml.cm  Tracing facility.
1160      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1161    
1162    The installer (config/install.sh) has been taught how to properly
1163    install this stuff.
1164    
1165    ----------------------------------------------------------------------
1166    Name: Matthias Blume
1167    Date: 2001/06/19 17:55:00 EDT
1168    Tag: blume-20010619-instantiate
1169    Description:
1170    
1171    This un-breaks the fix for bug 1432.
1172    (The bug was originally fixed in 110.9 but I broke it again some
1173    time after that.)
1174    
1175    ----------------------------------------------------------------------
1176    Name: Matthias Blume
1177    Date: 2001/06/19 17:25:00 EDT
1178    Tag: blume-20010619-signals
1179    Description:
1180    
1181    This should (hopefully) fix the long-standing signal handling bug.
1182    (The runtime system was constructing a continuation record with an
1183    incorrect descriptor which would cause the GC to drop data on the floor...)
1184    
1185    ----------------------------------------------------------------------
1186    Name: Matthias Blume
1187    Date: 2001/06/15 15:05:00 EDT
1188    Tag: blume-20010615-moresparc
1189    Description:
1190    
1191    Here is a short late-hour update related to Sparc c-calls:
1192    
1193     -- made handling of double-word arguments a bit smarter
1194    
1195     -- instruction selection phase tries to collapse certain clumsily
1196        constructed ML-Trees; typical example:
1197    
1198            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1199    
1200        This currently has no further impact on SML/NJ since mlriscGen does
1201        not seem to generate such patterns in the first place, and c-calls
1202        (which did generate them in the beginning) has meanwhile been fixed
1203        so as to avoid them as well.
1204    
1205    ----------------------------------------------------------------------
1206    Name: Matthias Blume
1207    Date: 2001/06/15 15:05:00 EDT
1208    Tag: blume-20010615-sparc
1209    Description:
1210    
1211    The purpose of this update is to provide an implementation of NLFFI
1212    on Sparc machines.
1213    
1214    Here are the changes in detail:
1215    
1216       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1217       the Sparc implementation of the c-calls API.
1218       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1219       for accessing the ML frame.  Thus, we have a real frame pointer and
1220       can freely modify %sp without need for an omit-frame-ptr phase.
1221       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1222       this case.
1223       * ml-nlffigen has been taught to produce code for different architectures
1224       and calling conventions.
1225       * In a way similar to what was done in the x86 case, the Sparc
1226       backend uses its own specific extension to mltree.  (For example,
1227       it needs to be able to generate UNIMP instructions which are part
1228       of the calling convention.)
1229       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1230       to make it easier to plug in new machine- and os-dependent parts).
1231    
1232    There are some other fairly unrelated bug fixes and cleanups as well:
1233    
1234       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1235       that they properly share their libraries with existing SML/NJ libraries.
1236       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1237       follow-up error messages.
1238       * Updates to CM/CMB documentation.
1239    
1240    TODO items:
1241    
1242       * MLRISC should use a different register as its asmTemp on the Sparc.
1243         (The current %o2 is a really bad choice because it is part of the
1244         calling conventions, so things might interfere in unexpected ways.)
1245    
1246    ----------------------------------------------------------------------
1247    Name: Matthias Blume
1248    Date: 2001/06/07
1249    Tag: blume-20010607-calls
1250    Description:
1251    
1252    A number of internal changes related to C calls and calling conventions:
1253    
1254    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1255       number of bytes popped implicitly (by the callee).  In most cases
1256       this field is 0 but on x86/win32 it is some non-zero value.  This
1257       is information provided for the benefit of the "omit-frameptr" pass.
1258    2. The CALL instruction on the x86 carries a similar "pops" field.
1259       The instruction selection phase copies its value from the ML-Tree
1260       CALL statement.
1261    3. On all other architectures, the instruction selection phase checks
1262       whether "pops=0" and complains if not.
1263    4. The c-calls implementation for x86 now accepts two calling conventions:
1264       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1265       up after the call and pops is set to 0.  For "stdcall", the caller
1266       does nothing, leaving the cleanup to the callee; pops is set to
1267       the number of bytes that were pushed onto the stack.
1268    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1269       distinguish between "ccall" and "stdcall".
1270    6. The UNIMP instruction has been added to the supported Sparc instruction
1271       set. (This is needed for implementing the official C calling convention
1272       on this architecture.)
1273    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1274       work with the latest CM.
1275    
1276    ----------------------------------------------------------------------
1277    Name: Matthias Blume
1278    Date: 2001/06/05 15:10:00 EDT
1279    Tag: blume-20010605-cm-index
1280    Description:
1281    
1282    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1283    
1284    1. CM can now generate "index files".  These are human-readable files
1285       that list on a per-.cm-file basis each toplevel symbol defined or
1286       imported.  The location of the index file for
1287       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1288       To enable index-file generation, set CM.Control.generate_index to true
1289       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1290    
1291       The CM manual has been updated accordingly.
1292    
1293    2. I made some slight modifications to the c-calls API in MLRISC.
1294    
1295         a) There is now a callback to support saving/restoring of
1296            dedicated but caller-save registers around the actual call
1297            instruction.
1298         b) One can optionally specify a comment-annotation for the
1299            call instruction.
1300    
1301    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1302       (For example, the comment annotation shows the C prototype of
1303        the function being called.)
1304    
1305    ----------------------------------------------------------------------
1306    Name: Matthias Blume
1307    Date: 2001/06/01 13:30:00 EDT
1308    Tag: blume-20010601-nlffi-cleanup
1309    Description:
1310    
1311    This is mostly a cleanup of MLFFI stuff:
1312    
1313       - some signature files have been put into a more exposed place
1314       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1315       - ml-nlffigen changed accordingly
1316       - tutorial updated
1317    
1318    Other changes:
1319    
1320       - author's affiliation in CM manual(s) updated
1321       - some more recognized keywords added to Allen's sml.sty
1322    
1323    ----------------------------------------------------------------------
1324    Name: Matthias Blume
1325    Date: 2001/05/25 15:30:00 EDT
1326    Tag: blume-20010525-iptr
1327    Description:
1328    
1329      - put the official 110.33-README (as it appears on the ftp server) under
1330        CVS
1331      - fixed a small bug related to incomplete pointer types in
1332        ml-nlffigen
1333      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1334        (it does not need the 'f type parameter)
1335    
1336    ----------------------------------------------------------------------
1337    Name: Matthias Blume
1338    Date: 2001/05/23 14:30:00 EDT
1339    Tag: Release_110_33
1340    Description:
1341    
1342    New version number (110.33).  New bootfiles.
1343    
1344    ----------------------------------------------------------------------
1345    Name: Matthias Blume
1346    Date: 2001/05/22 18:06:00 EDT
1347    Tag: blume-20010522-targets
1348    Description:
1349    
1350    Made install.sh use file config/targets.customized if it exists, falling
1351    back to config/targets if it doesn't.  This way one can have a customized
1352    version of the targets file without touching the "real thing", thus
1353    eliminating the constant fear of accidentally checking something bogus
1354    back into the CVS repository...  (File config/targets.customized must
1355    not be added to the repository!)
1356    
1357    ----------------------------------------------------------------------
1358    Name: Matthias Blume
1359    Date: 2001/05/22 16:30:00 EDT
1360    Tag: blume-20010522-minitut
1361    Description:
1362    
1363    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1364       struct returns.
1365    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1366       incomplete, preliminary documentation for NLFFI.
1367    
1368    ----------------------------------------------------------------------
1369    Name: Matthias Blume
1370    Date: 2001/05/14 11:30:00 EDT
1371    Tag: blume-20010514-script
1372    Description:
1373    
1374    Some bugs in install script fixed.
1375    
1376    In addition to that I also made a slight change to the NLFFI API:
1377    Functors generated by ml-nlffigen now take the dynamic library as a
1378    straight functor argument, not as a suspended one.  (The original
1379    functor code used to force the suspension right away anyway, so there
1380    was nothing gained by this complication of the interface.)
1381    
1382    ----------------------------------------------------------------------
1383    Name: Matthias Blume
1384    Date: 2001/05/11 14:35:00 EDT
1385    Tag: blume-20010511-ml-nlffi
1386    Description:
1387    
1388    I finally took the plunge and added my new FFI code to the main
1389    repository.  For x86-linux it is now ready for prime-time.
1390    
1391    There are two new subdirectories of "src":
1392    
1393      - ml-nlffi-lib:
1394           The utility library for programs using the FFI interface.
1395           Here is the implementation of $/c.cm and its associated low-level
1396           partners $/c-int.cm and $/memory.cm.
1397      - ml-nlffigen:
1398           A stand-alone program for generating ML glue code from C source
1399           code.
1400    
1401    Building ml-nlffigen requires $/ckit-lib.cm.
1402    
1403    The config/install.sh script has been updates to do the Right Thing
1404    (hopefully).
1405    
1406    Notice that the source tree for the C-Kit will not be put under "src"
1407    but directly under the installation root directory.  (This is the
1408    structure that currently exists on the CVS server when you check out
1409    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1410    
1411    Bugs: No documentation yet.
1412    
1413    ----------------------------------------------------------------------
1414    Name: Matthias Blume
1415    Date: 2001/05/09 16:35:00 EDT
1416    Tag: blume-20010509-cpscontract
1417    Description:
1418    
1419    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1420    wrapper/unwrapper elimination did not decrement usage counts and some
1421    dead variables got overlooked by the dead-up logic.)
1422    
1423    ----------------------------------------------------------------------
1424    Name: Lal George
1425    Date: 2001/05/08  17:26:09 EDT
1426    Tag: george-20010508-omit-frameptr
1427    Description:
1428    
1429    Changes to implement the omit-frame-pointer optimization to support
1430    raw C calls. For now, there is only support on the Intel x86, but
1431    other architectures will follow as more experience is gained with this.
1432    
1433    
1434    ----------------------------------------------------------------------
1435    Name: Matthias Blume
1436    Date: 2001/05/07 14:40:00 EDT
1437    Tag: blume-20010507-proxies
1438    Description:
1439    
1440    I made into "proxy libraries" all libraries that qualify for such a
1441    change.  (A qualifying library is a library that has another library or
1442    groups as its sole member and repeats that member's export list
1443    verbatim.  A proxy library avoids this repetition by omitting its export
1444    list, effectively inheriting the list that its (only) member exports.
1445    See the CM manual for more explanation.)
1446    The main effect is that explicit export lists for these libraries
1447    do not have to be kepts in sync, making maintenance a bit easier.
1448    
1449    I also added copyright notices to many .cm-files.
1450    
1451    Last but not least, I made a new set of bootfiles.
1452    
1453    ----------------------------------------------------------------------
1454    Name: Matthias Blume
1455    Date: 2001/05/04 17:00:00 EDT
1456    Tag: blume-20010504-cm-lsplit
1457    Description:
1458    
1459    0. John merged pending changes to $/smlnj-lib.cm
1460    
1461    1. Allen's previous change accidentally backed out of one of Lal's
1462       earlier changes.  I undid this mistake (re-introducing Lal's change).
1463    
1464    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1465       within the compiler where applicable.  There is some code simplification
1466       because of that.
1467    
1468    3. The "split" phase (in FLINT) is now part of the default list of phases.
1469       Compiler.Control.LambdaSplitting.* can be used to globally control the
1470       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1471       it can now also be controlled on a per-source basis: CM has been taught
1472       a new tool parameter applicable to ML source files.
1473    
1474       - To turn lambda-splitting off completely:
1475            local open Compiler.Control.LambdaSplitting in
1476                val _ = set Off
1477            end
1478       - To make "no lambda-splitting" the global default (but allow per-source
1479         overriding); this is the initial setting:
1480            local open Compiler.Control.LambdaSplitting in
1481                val _ = set (Default NONE)
1482            end
1483       - To make "lambda-splitting with aggressiveness a" the global default
1484         (and allow per-source overriding):
1485            local open Compiler.Control.LambdaSplitting in
1486                val _ = set (Default (SOME a))
1487            end
1488    
1489       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1490         write (in the respective .cm-file):
1491            a.sml (lambdasplitting:off)
1492       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1493            a.sml (lambdasplitting:on)
1494       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1495         <a> is a decimal non-negative integer):
1496            a.sml (lambdasplitting:<a>)
1497       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1498            a.sml (lambdasplitting:infinity)
1499       - To use the global default for a.sml:
1500            a.sml (lambdasplitting:default)
1501         or simply
1502            a.sml
1503    
1504    ----------------------------------------------------------------------
1505    Name: Allen Leung
1506    Date: 2001/05/04 01:57:00 EDT
1507    Tag: leunga-20010504-sync
1508    Description:
1509    
1510      MLRISC features.
1511    
1512      1. Fix to CMPXCHG instructions.
1513      2. Changed RA interface to allow annotations in callbacks.
1514      3. Added a new method to the stream interface to allow annotations updates.
1515    
1516    ----------------------------------------------------------------------
1517    Name: Matthias Blume
1518    Date: 2001/05/01 11:45:00 EDT
1519    Tag: blume-20010501-pcedittmp
1520    Description:
1521    
1522    Changed install.sh to use the current working directory instead of
1523    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1524    of /usr/tmp caused trouble with MacOS X because of file premission
1525    problems.
1526    
1527    ----------------------------------------------------------------------
1528    Name: Matthias Blume
1529    Date: 2001/04/20 11:10:00 EDT
1530    Tag: blume-20010420-inMLflag
1531    Description:
1532    
1533     - added vp_limitPtrMask to vproc-state.h
1534       (for use by the raw-C-calls mechanism to implement proper interrupt
1535        handling)
1536     - made the ML compiler aware of various data-structure offsets so it
1537       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1538     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1539       raw C-calls
1540    
1541    ----------------------------------------------------------------------
1542    Name: Lal George
1543    Date: 2001/04/20 09:15:28 EDT
1544    Tag: george-20010420-macosX
1545    Description:
1546    
1547     - Changes to port to Mac OS X; Darwin.
1548    
1549     - In the process I found that sqrt was broken on the PPC, because the
1550       fsqrt instruction is not implemented.
1551    
1552    ----------------------------------------------------------------------
1553    Name: Matthias Blume
1554    Date: 2001/04/18 12:45:00 EDT
1555    Tag: blume-20010418-ccalls
1556    Description:
1557    
1558     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1559       (this bug prevented structure arguments containing pointers from being
1560        passed correctly)
1561     - changed the raw-C-call code in mlriscGen.sml in such a way that
1562       structure arguments are represented as a pointer to the beginning
1563       of the structure (instead of having a series of synthesized arguments,
1564       one for each structure member)
1565    
1566     - made makeml script's verbosity level configurable via environment
1567       variable (MAKEML_VERBOSITY)
1568    
1569     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1570       in rawmem-x86.sml; we are now using the real thing
1571    
1572    ----------------------------------------------------------------------
1573    Name: Matthias Blume
1574    Date: 2001/03/22 16:25:00 EST
1575    Tag: blume-20010322-bootfiles
1576    Description:
1577    
1578    Created a new set of bootfiles (for your automatic installation convenience).
1579    
1580    ----------------------------------------------------------------------
1581    Name: Matthias Blume
1582    Date: 2001/03/22 15:10:00 EST
1583    Tag: blume-20010322-rawmem-parcm
1584    Description:
1585    
1586    1. All "raw memory access" primitives for the new FFI are implemented now
1587       (at least on the x86).
1588    2. Some further cleanup of CM's parallel make mechanism.
1589    
1590    ----------------------------------------------------------------------
1591    Name: Matthias Blume
1592    Date: 2001/03/19 17:53:00 EST
1593    Tag: blume-20010319-parallel
1594    Description:
1595    
1596    Parallel make (using compile servers) now works again.
1597    
1598    To this end, CM.stabilize and CMB.make have been modified to work in
1599    two passes when compile servers are attached:
1600       1. Compile everything, do not perform stabilization; this pass
1601          uses compile servers
1602       2. Stabilize everything; this pass does not use compile servers
1603    If there are no compile servers, the two passes are combined into one
1604    (as before).  Splitting the passes increases the inherent parallelism
1605    in the dependency graph because the entire graph including all
1606    libraries is available at the same time.  This, in turn, improves
1607    server utilization.  The downside is that the master process will
1608    have to do some extra work after compilation is done (because for
1609    technical reasons it must re-read all the binfiles during stabilization).
1610    
1611    ----------------------------------------------------------------------
1612    Name: Matthias Blume
1613    Date: 2001/03/16 12:22:00 EST
1614    Tag: blume-20010316-bootfiles
1615    Description:
1616    
1617    Created a new set of bootfiles (for your automatic installation convenience).
1618    
1619    ----------------------------------------------------------------------
1620    Name: Matthias Blume
1621    Date: 2001/03/16 11:00:00 EST
1622    Tag: blume-20010316-MLTREE-fixup
1623    Description:
1624    
1625    This is a minor fixup for an (untagged) earlier commit by Allen.
1626    (A file was missing).
1627    
1628    ----------------------------------------------------------------------
1629    Name: Allen Leung
1630    Date: Mon Mar  5 18:54:57 EST 2001
1631    Tag: leunga-20010305-cut-support
1632    
1633    1. New support for alternative control-flow in MLTREE.
1634       Currently we support
1635    
1636          FLOW_TO(CALL ...., [k1,...,kn])
1637    
1638       This is needed for 'cuts to' in C-- and try/handle-like constructs
1639       in Moby
1640    
1641       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1642    
1643    2. Register Allocator
1644    
1645       Changes in interface [from Fermin, John]
1646    
1647    3. Alpha 8-bit SLL support [Fermin]
1648    
1649    4. All architectures
1650    
1651       A new module (ClusterExpandCopies) for expanding parallel copies.
1652    
1653    ----------------------------------------------------------------------
1654    Name: Allen Leung
1655    Date: 2001/02/27 23:07:00 EST
1656    Tag: leunga-20010227-minor-stuff
1657    
1658    1. Alpha bug fix for CMOVNE
1659    2. Handle mltree COND(..,FCMP ...,...)
1660    3. Bug fix in simplifier
1661    
1662    ----------------------------------------------------------------------
1663    Name: Matthias Blume
1664    Date: 2001/01/30 17:50:00 EST
1665    Tag: blume-20010130-sync
1666    Description:
1667    
1668    This is just a minor update to sync my devel branch with the main brach.
1669    The only visible change is the addition of some README files.
1670    
1671    ----------------------------------------------------------------------
1672    Name: Matthias Blume
1673    Date: 2001/01/12 23:30:00 JST
1674    Tag: blume-20010112-bootfiles
1675    Description:
1676    
1677    Made a new set of bootfiles that goes with the current state of the
1678    repository.
1679    
1680    ----------------------------------------------------------------------
1681    Name: Matthias Blume
1682    Date: 2001/01/12 21:20:00 JST
1683    Tag: blume-20010112-sync
1684    Description:
1685    
1686    I am just flushing out some minor changes that had accumulated in
1687    my private branch in order to sync with the main tree.  (This is
1688    mainly because I had CVS trouble when trying to merge _into_ my
1689    private branch.)
1690    
1691    Most people should be completely unaffected by this.
1692    
1693    ----------------------------------------------------------------------
1694    Name: Allen Leung
1695    Date: Thu Jan 11 21:03:00 EST 2001
1696    Tag: leunga-20010111-labexp=mltree
1697    Description:
1698    
1699    1.  Removed the type LabelExp and replace it by MLTree.
1700    2.  Rewritten mltree-simplify with the pattern matcher tool.
1701    3.  There were some bugs in alpha code generator which would break
1702        64-bit code generation.
1703    4.  Redo the tools to generate code with the
1704    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1705        are now generated by perl scripts.
1706    
1707    ----------------------------------------------------------------------
1708    Name: Matthias Blume
1709    Date: 2001/01/10 21:55:00 JST
1710    Tag: blume-20010110-rcc
1711    Description:
1712    
1713    The RCC stuff now seems to work (but only on the x86).
1714    This required hacking of the c-calls interface (and -implementation) in
1715    MLRISC.
1716    
1717    Normal compiler users should be unaffected.
1718    
1719    ----------------------------------------------------------------------
1720    Name: Matthias Blume
1721    Date: 2001/01/09 01:20:00 JST
1722    Tag: blume-20010109-rcc
1723    Description:
1724    
1725    This is a fairly big patch, flushing out a large number of pending
1726    changes that I made to my development copy over the last couple of days.
1727    
1728    Of practical relevance at this moment is a workaround for a pickling
1729    bug that Allen ran into the other day.  The cause of the bug itself is
1730    still unknown and it might be hard to fix it properly, but the
1731    workaround has some merits of its own (namely somewhat reducing pickling
1732    overhead for certain libraries).  Therefore, I think this solution should
1733    be satisfactory at this time.
1734    
1735    The rest of the changes (i.e., the vast majority) has to do with my
1736    ongoing efforts of providing direct support for C function calls from
1737    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1738    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1739    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1740    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1741    handle RCC.
1742    
1743    The last part (the changes to mlriscGen.sml) are still known to be
1744    wrong on the x86 and not implemented on all other architectures.  But
1745    the infrastructure is in place. I had to change a few functor
1746    signatures in the backend to be able to route the CCalls interface
1747    from MLRISC there, and I had to specialize the mltree type (on the
1748    x86) to include the necessary extensions. (The extensions themselves
1749    were already there and redy to go in MLRISC/x86).
1750    
1751    Everything should be very happy as soon as someone helps me with
1752    mlriscGen.sml...
1753    
1754    In any case, nothing of this should matter to anyone as long as the
1755    new primop is not being used (which is going to be the case unless you
1756    find it where I hid it :). The rest of the compiler is completely
1757    unaffected.
1758    
1759    ----------------------------------------------------------------------
1760    Name: Matthias Blume
1761    Date: 2001/01/05 00:30:00 JST
1762    Tag: blume-20010105-primops
1763    Description:
1764    
1765    Added some experimental support for work that I am doing right now.
1766    These changes mostly concern added primops, but there is also a new
1767    experimental C library in the runtime system (but currently not enabled
1768    anywhere except on Linux/X86).
1769    
1770    In the course of adding primops (and playing with them), I discovered that
1771    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1772    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1773    To recover, I made type information in INL_PRIM mandatory and changed
1774    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1775    has complete, correct type information (i.e., no bottom types).
1776    
1777    Since all these changes mean that we need new binfiles, I also bumped the
1778    version number to 110.32.1.
1779    
1780    ----------------------------------------------------------------------
1781    Name: Matthias Blume
1782    Date: 2000/12/30 22:10:00 JST
1783    Tag: blume-20001230-various
1784    Description:
1785    
1786    Added proxy libraries for MLRISC and let MLRISC libraries refer
1787    to each other using path anchors.  (See CM manual for explanation.)
1788    
1789    Updated CM documentation.
1790    
1791    Fixed some bugs in CM.
1792    
1793    Implemented "proxy" libraries (= syntactic sugar for CM).
1794    
1795    Added "-quiet" option to makeml and changed runtime system accordingly.
1796    
1797    Added cleanup handler for exportML to reset timers and compiler stats.
1798    
1799    ----------------------------------------------------------------------
1800    Name: Lal George
1801    Date: 2000/12/22 22:22:58 EST 2000
1802    Tag: Release_110_32
1803    Description:
1804    
1805            Infinite precision used throughout MLRISC.
1806            see MLRISC/mltree/machine-int.sig
1807    
1808    ----------------------------------------------------------------------
1809    Name: Matthias Blume
1810    Date: 2000/12/22 23:16:00 JST
1811    Tag: blume-20001222-warn
1812    Description:
1813    
1814    Corrected wording and formatting of some CM warning message which I
1815    broke in my previous patch.
1816    
1817    ----------------------------------------------------------------------
1818    Name: Matthias Blume
1819    Date: 2000/12/22 21:20:00 JST
1820    Tag: blume-20001222-anchorenv
1821    Description:
1822    
1823    Fixed CM's handling of anchor environments in connection with CMB.make.
1824    
1825    ----------------------------------------------------------------------
1826    Name: Matthias Blume
1827    Date: 2000/12/22 13:15:00 JST
1828    Tag: blume-20001222-cleanup
1829    Description:
1830    
1831    Removed src/cm/ffi which does not (and did not) belong here.
1832    
1833    ----------------------------------------------------------------------
1834    Name: Matthias Blume
1835    Date: 2000/12/21 23:55:00 JST
1836    Tag: blume-20001221-exn
1837    Description:
1838    
1839    Probably most important: CM no longer silently swallows all exceptions
1840    in the compiler.
1841    Plus: some other minor CM changes.  For example, CM now reports some
1842    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1843    
1844    ----------------------------------------------------------------------
1845    Name: Matthias Blume
1846    Date: 2000/12/15 00:01:05 JST
1847    Tag: blume-20001215-dirtool
1848    Description:
1849    
1850    - "dir" tool added.
1851    - improvements and cleanup to Tools structure
1852    - documentation updates
1853    
1854    ----------------------------------------------------------------------
1855    Name: Allen Leung
1856    Date: Thu Dec 14 03:45:24 EST 2000
1857    Description:
1858    Tag:  leunga-20001214-int-inf
1859    Description:
1860    
1861       In IntInf, added these standard functions, which are missing from our
1862    implementation:
1863    
1864        andb : int * int -> int
1865        xorb : int * int -> int
1866        orb  : int * int -> int
1867        notb : int -> int
1868         <<   : int * word -> int
1869        ~>>  : int * word -> int
1870    
1871       Not tested, I hope they are correct.
1872    
1873    ----------------------------------------------------------------------
1874    Name: Allen Leung
1875    Date: Fri Dec  8 19:23:26 EST 2000
1876    Description:
1877    Tag:  leunga-20001208-nowhere
1878    Description:
1879    
1880      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1881    to generate better error messages etc.  Plus a brief manual.
1882    
1883    ----------------------------------------------------------------------
1884    Name: Lal George
1885    Date: 2000/12/08 09:54:02 EST 2000
1886    Tag: Release_110_31
1887    Description:
1888    
1889    - Version 110.31
1890    ----------------------------------------------------------------------
1891    Name: Allen Leung
1892    Date: Thu Dec  7 22:01:04 EST 2000
1893    Tag:  leunga-20001207-cell-monster-hack
1894    Description:
1895    
1896    Major MLRISC internal changes.  Affect all clients.
1897    Summary:
1898    
1899    1.  Type CELLS.cell = int is now replaced by a datatype.
1900        As a result, the old regmap is now gone.  Almost all interfaces
1901        in MLRISC change as a consequence.
1902    
1903    2.  A new brand version of machine description tool (v3.0) that generates
1904        modules expecting the new interface.  The old version is removed.
1905    
1906    3.  The RA interface has been further abstracted into two new functors.
1907        RISC_RA and X86RA.  These functors have much simpler interfaces.
1908        [See also directory MLRISC/demo.]
1909    
1910    4.  Some other new source->source code generation tools are available:
1911    
1912        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1913        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1914           I use this tool to generate the peephole optimizers---with the new
1915           cell type changes, peephole rules are becoming difficult to write
1916           without conditional pattern matching.
1917    
1918    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1919        cover the entire MLRISC source tree so many things broke.
1920    
1921    6.  CM files have been moved to the subdirectory MLRISC/cm.
1922        They are moved because there are a lot of them and they clutter up the
1923        root dir.
1924    
1925    7.  More detailed documentation to come...
1926    
1927        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1928        a makeml -rebuild first.  This is because of other other
1929        changes that Matthias has made (see below).
1930    
1931    
1932    ----------------------------------------------------------------------
1933    Name: Matthias Blume
1934    Date: 2000/11/30 23:12:00 JST
1935    Tag: blume-20001130-filereorg
1936    Description:
1937    
1938    Some manual updates and some file reorganizations in CM.
1939    
1940    ----------------------------------------------------------------------
1941    Name: Matthias Blume
1942    Date: 2000/11/24 17:45:00 JST
1943    Tag: blume-20001124-link
1944    Description:
1945    
1946    Drastically improved link traversal code for the case that the dynamic
1947    value was already loaded at bootstrap time.  As a result, CM and CMB
1948    now both load blazingly fast -- even on a very slow machine.  Also,
1949    memory consumption has been further reduced by this.
1950    
1951    Warning: The format of the PIDMAP file has changed.  THerefore, to
1952    bootstrap you have to do this:
1953    
1954    1. Run CMB.make
1955    2. Make a symbolic link for the boot directory:
1956         ln -s sml.boot.ARCH-OS xxx
1957    3. "Rebuild" the boot directory:
1958         ./makeml -boot xxx -rebuild sml ; rm xxx
1959    4. Boot normally:
1960          ./makeml
1961    
1962    ----------------------------------------------------------------------
1963    Name: Matthias Blume
1964    Date: 2000/11/21 21:20:00 JST
1965    Tag: blume-20001121-tools
1966    Description:
1967    
1968    Continued hacking on autoloading problem -- with success this time.
1969    Also changed tool-plugin mechanism.  See new CM manual.
1970    
1971    ----------------------------------------------------------------------
1972    Name: Matthias Blume
1973    Date: 2000/11/19 14:30:00 JST
1974    Tag:  blume-20001119-autoload
1975    Description:
1976    
1977    Some hacking to make autoloading faster.  Success for CMB, no success
1978    so far for CM.  There is a reduced structure CM' that autoloads faster.
1979    (This is a temporary, non-documented hack to be eliminated again when
1980    the general problem is solved.)
1981    
1982    ----------------------------------------------------------------------
1983    Name: Matthias Blume
1984    Date: 2000/11/17 14:10:00 JST
1985    Tag: blume-20001117-pickle-lib
1986    Description:
1987    
1988    1. Eliminated comp-lib.cm
1989    2. Made pickle-lib.cm
1990    3. Eliminated all uses of intset.sml (from comp-lib.cm)
1991    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1992       equivalent constructs from smlnj-lib.cm (INtHashTable).
1993    5. Point 4. also goes for those uses of intmap.* in MLRISC.
1994       Duplicated intmap modules thrown out.
1995    6. Hunted down all duplicated SCC code and replaced it with
1996       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1997    7. Rewrote Feedback module.
1998    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
1999       should be thrown out and equivalent modules from smlnj-lib.cm
2000       should be used (IntRedBlackSet, IntListSet, ...).
2001    
2002    Confirmed that compiler compiles to fixpoint.
2003    
2004    ----------------------------------------------------------------------
2005    Name: Allen Leung
2006    Date: 2000/11/10 18:00:00
2007    Tag: leunga-20001110-new-x86-fp
2008    
2009    A new x86 floating point code generator has been added.
2010    By default this is turned off.  To turn this on, do:
2011    
2012        CM.autoload "$smlnj/compiler.cm";
2013        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2014    
2015    Changes:
2016    
2017    1.  Changed FTAN to FPTAN so that the assembly output is correct.
2018    2.  Changed the extension callback for FTANGENT to generate:
2019    
2020              fptan
2021              fstp  %st(0)
2022        instead of
2023              fptan
2024              fstpl ftempmem
2025    
2026    3.  Numerous assembly fixes for x86.
2027    
2028    5.  Cleaned up the machine code output module x86/x86MC.sml and added
2029        support for a whole bunch of instructions and addressing modes:
2030    
2031          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
2032          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
2033          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
2034          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2035          fxch %st(n)
2036          fld %st(n)
2037          fst %st(n)
2038          fst mem
2039          fstp %st(n)
2040          fucom %st(n)
2041          fucomp %st(n)
2042    
2043        All these are now generated when the fast fp mode is turned on.
2044    
2045    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2046    
2047    ----------------------------------------------------------------------
2048    Name: Matthias Blume
2049    Date: 2000/11/09 11:20:00 JST
2050    Tag: blume-20001109-scc
2051    Description:
2052    
2053    Eliminated some code duplication:
2054    
2055    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2056       (Otherwise the functor is useless.)
2057    2. Used GraphSCCFn where SCCUtilFun was used previously.
2058    3. Got rid of SCCUtilFun (in comp-lib.cm).
2059    
2060    ----------------------------------------------------------------------
2061    Name: Lal George
2062    Date: 2000/11/06 09:02:21 EST 2000
2063    Tag: Release_110_30
2064    Description:
2065    
2066    - Version 110.30
2067    ----------------------------------------------------------------------
2068    Name: Matthias Blume
2069    Date: 2000/11/04 14:45:00
2070    Tag: blume-20001104-mlbuild
2071    Description:
2072    
2073    - Made ml-build faster on startup.
2074    - Documentation fixes.
2075    
2076    ----------------------------------------------------------------------
2077    Name: Matthias Blume
2078    Date: 2000/11/02 17:00:00 JST
2079    Tag: blume-20001102-condcomp
2080    Description:
2081    
2082    - Small tweaks to pickler -- new BOOTFILES!
2083    - Version bumped to 110.29.2.
2084    - Added conditional compilation facility to init.cmi (see comment there).
2085    ----------------------------------------------------------------------
2086    Name: Allen Leung
2087    Date: 2000/10/23 19:31:00
2088    Tag: leunga-20001023-demo-ra
2089    
2090    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2091    2. Test programs for the graph library updated
2092    3. Some new MLRISC demo programs added
2093    
2094    ----------------------------------------------------------------------
2095    Name: Matthias Blume
2096    Date: 2000/08/31 22:15:00 JST
2097    Tag: blume-20001017-errmsg
2098    Description:
2099    
2100    More error message grief: Where there used to be no messages, there
2101    now were some that had bogus error regions.  Fixed.
2102    
2103    ----------------------------------------------------------------------
2104    Name: Matthias Blume
2105    Date: 2000/08/31 17:30:00 JST
2106    Tag: blume-20001017-v110p29p1
2107    Description:
2108    
2109    I made a version 110.29.1 with new bootfiles.
2110    
2111    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2112              CM documentation changes and a small bugfix in CM's error reporting.
2113    
2114    ----------------------------------------------------------------------
2115    Name: Lal George
2116    Date: 2000/09/27 14:42:35 EDT
2117    Tag: george-20000927-nodestatus
2118    Description:
2119    
2120    Changed the type of the nodestatus, so that:
2121    
2122            SPILLED(~1)             is now SPILLED
2123            SPILLED(m) where m>=0   is now MEMREG(m)
2124            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2125    
2126    ----------------------------------------------------------------------
2127    Name: Matthias Blume
2128    Date: 2000/09/07 14:45:00 JST
2129    Tag: blume-20000907-cmerrmsg
2130    Description:
2131    
2132    Small tweak to CM to avoid getting ML syntax error messages twice.
2133    
2134    ----------------------------------------------------------------------
2135    Name: Matthias Blume
2136    Date: 2000/08/31 18:00:00 JST
2137    Tag: blume-20000831-cvsbootfiles
2138    Description:
2139    
2140    New URL for boot files (because the 110.29 files on the BL server do
2141    now work correctly with my updated install scripts for yacc and lex).
2142    
2143    ----------------------------------------------------------------------
2144    Name: Matthias Blume
2145    Date: 2000/08/08 12:33:00 JST
2146    Tag: blume-20000808-manual
2147    Description:
2148    
2149    Tiny update to CM manual.
2150    
2151    ----------------------------------------------------------------------
2152    Name: Allen Leung
2153    Date: 2000/08/7 19:31:00
2154    Tag: leunga-20000807-a-whole-bunch-of-stuff
2155    
2156      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2157    and Mobdy.
2158    
2159    1.  x86
2160    
2161       a.  Fixes to peephole module by John and Dan.
2162       b.  Assembly fix to SETcc by Allen.
2163       c.  Fix to c-call by John.
2164       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2165       e.  Instruction selection optimization to SETcc as suggested by John.
2166    
2167           For example,
2168    
2169            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2170    
2171           should generate:
2172    
2173            MOVL a, x
2174            SUBL b, x
2175            SHRL 31, x
2176    
2177    2.  IR stuff
2178    
2179         A bunch of new DJ-graph related algorithms added.  These
2180         speed up SSA construction.
2181    
2182    3.  SSA + Scheduling
2183    
2184         Added code for SSA and scheduling to the repository
2185    
2186    ----------------------------------------------------------------------
2187    Name: Lal George
2188    Date: 2000/07/27 11:53:14 EDT
2189    
2190    Tag: lal-20000727-linux-ppc
2191    Description:
2192    
2193     Made changes to support Linux PPC.
2194     p.s. I have confirmation that the 110.29 boot files work fine.
2195    
2196    ----------------------------------------------------------------------
2197    Name: Matthias Blume
2198    Date: 2000/07/27 17:40:00 JST
2199    Tag: blume-20000727-scripts
2200    Description:
2201    
2202    !!!! WARNING !!!!
2203    You must recompile the runtime system!
2204    !!!! WARNING !!!!
2205    
2206    This is basically another round of script-enhancements:
2207    
2208    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2209       and undefine CM preprocessor symbols.
2210    
2211    2. ml-build avoids generating a new heap image if it finds that the
2212       existing one is still ok.  (The condition is that no ML file had to
2213       be recompiled and all ML files are found to be older that the heap
2214       file.)
2215    
2216       To make this work smoothly, I also hacked the runtime system as
2217       well as SMLofNJ.SysInfo to get access to the heap image suffix
2218       (.sparc-solaris, ...) that is currently being used.
2219    
2220       Moreover, the signature of CM.mk_standalone has changed.  See the
2221       CM manual.
2222    
2223    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2224       CM manual for details.)
2225    
2226    4. More CM manual updates:
2227        - all of the above has been documented.
2228        - there is now a section describing the (CM-related) command line
2229          arguments that are accepted by the "sml" command
2230    
2231    ----------------------------------------------------------------------
2232    Name: Matthias Blume
2233    Date: 2000/07/25 16:20:00 JST
2234    Tag: blume-20000725-makedepend
2235    Description:
2236    
2237    Added a script called ml-makedepend.  This can be used in makefiles
2238    for Unix' make in a way very similar to the "makedepend" command for
2239    C.
2240    
2241    The script internally uses function CM.sources.
2242    
2243    Synopsis:
2244    
2245        ml-makedepend [-f makefile] cmfile targetname
2246    
2247    The default for the makefile is "makefile" (or "Makefile" should
2248    "makefile" not exist).
2249    
2250    ml-makedepend adds a cmfile/targetname-specific section to this
2251    makefile (after removing the previous version of this section).  The
2252    section contains a single dependency specification with targetname on
2253    the LHS (targetname is an arbitrary name), and a list of files derived
2254    from the cmfile on the RHS.  Some of the files on the RHS are
2255    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2256    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2257    path names.  The makefile writer is responsible for making sure that
2258    these variables have correct at the time "make" is invoked.
2259    
2260    ----------------------------------------------------------------------
2261    Name: Matthias Blume
2262    Date: 2000/07/22 23:30:00 JST
2263    Tag: blume-20000722-urlupdate
2264    Description:
2265    
2266    Changed BOOT and config/srcarchiveurl to point to BL server:
2267    
2268        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2269    
2270    ----------------------------------------------------------------------
2271    Name: Matthias Blume
2272    Date: 2000/07/18 18:00:00 JST
2273    Tag: blume-20000718-Version_110_29
2274    Description:
2275    
2276    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2277    
2278    2. Updated config/version to 110.29
2279    
2280    3. Updated config/srcarchiveurl
2281    
2282    3. New boot files!
2283       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2284    
2285    ----------------------------------------------------------------------
2286    Name: Matthias Blume
2287    Date: 2000/07/11 13:58:00 JST
2288    Tag: blume-20000711-doctypo
2289    Description:
2290    
2291    Fixed a few typos in CM manual.
2292    
2293    ----------------------------------------------------------------------
2294    Name: Allen Leung
2295    Date: 2000/06/15 00:38:00
2296    Tag: leunga-20000704-sparc-x86
2297    
2298    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2299    2. fix to x86 RET bug [found by Dan Grossman]
2300    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2301    
2302       Affects c-- and moby only
2303    
2304    ----------------------------------------------------------------------
2305    Name: Matthias Blume
2306    Date: 2000/07/04 15:26:00
2307    Tag: blume-20000704-trigger
2308    Description:
2309    
2310    1. Improvements to CM manual.
2311    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2312       of getting a back-trace.  The function, when called, raises an
2313       internal exception which explicitly carries the full back-trace history,
2314       so it is unaffected by any intervening handle-raise pairs ("trivial"
2315       or not).  The interactive loop will print that history once it arrives
2316       at top level.
2317       Short of having all exceptions implicitly carry the full history, the
2318       recommended way of using this facility is:
2319         - compile your program with instrumentation "on"
2320         - run it, when it raises an exception, look at the history
2321         - if the history is "cut off" because of some handler, go and modify
2322           your program so that it explicitly calls BTrace.trigger
2323         - recompile (still instrumented), and rerun; look at the full history
2324    
2325    ----------------------------------------------------------------------
2326    Name: Matthias Blume
2327    Date: 2000/07/03 15:36:00 JST
2328    Tag: blume-20000702-manual
2329    Description:
2330    
2331    Small corrections and updates to CM manual.
2332    
2333    ----------------------------------------------------------------------
2334    Name: Matthias Blume
2335    Date: 2000/06/29 16:04:00 JST
2336    Tag: blume-20000629-yacctool
2337    Description:
2338    
2339    Changes:
2340    
2341    1. Class "mlyacc" now takes separate arguments to pass options to
2342       generated .sml- and .sig-files independently.
2343    2. Corresponding CM manual updates.
2344    3. BTrace module now also reports call sites.  (However, for loop clusters
2345       it only shows from where the cluster was entered.)  There are associated
2346       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2347    
2348    ----------------------------------------------------------------------
2349    Name: Matthias Blume
2350    Date: 2000/06/27 16:51:00 JST
2351    Tag: blume-20000627-noweb
2352    Description:
2353    
2354    Changes:
2355    
2356     1. Implemented "subdir" and "witness" options for noweb tool.
2357        This caused some slight internal changes in CM's tool implementation.
2358     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2359        some remaining issues from earlier path anchor changes.
2360     3. Updated CM manual accordingly.
2361    
2362     4. Changed implementation of back-tracing so that I now consider it
2363        ready for prime-time.
2364    
2365        In particular, you don't have to explicitly trigger the back-trace
2366        anymore.  Instead, if you are running BTrace-instrumented code and
2367        there is an uncaught exception (regardless of whether or not it was
2368        raised in instrumented code), the top-level evalloop will print
2369        the back-trace.
2370    
2371        Features:
2372    
2373          - Instrumented and uninstrumented code work together seemlessly.
2374            (Of course, uninstrumented code is never mentioned in actual
2375             back-traces.)
2376    
2377          - Asymptotic time- and space-complexity of instrumented code is
2378            equal to that of uninstrumented code.  (This means that
2379            tail-recursion is preserved by the instrumentation phase.)
2380    
2381          - Modules whose code has been instrumented in different sessions
2382            work together without problem.
2383    
2384          - There is no penalty whatsoever on uninstrumented code.
2385    
2386          - There is no penalty on "raise" expressions, even in
2387            instrumented code.
2388    
2389        A potential bug (or perhaps it is a feature, too):
2390    
2391          A back-trace reaches no further than the outermost instrumented
2392          non-trivial "raise".  Here, a "trivial" raise is one that is the
2393          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2394    
2395               <exp> handle e => raise e
2396    
2397          and even
2398    
2399               <exp> handle Foo => raise Bar
2400    
2401          and, of course, through
2402    
2403               <exp> handle Foo => ...
2404    
2405         if the exception was not Foo.
2406    
2407         Back-traces always reach right through any un-instrumented code
2408         including any of its "handle" expressions, trivial or not.
2409    
2410       To try this out, do the following:
2411    
2412         - Erase all existing binfiles for your program.
2413           (You may keep binfiles for those modules where you think you
2414            definitely don't need back-tracing.)
2415         - Turn on back-trace instrumentation:
2416              SMLofNJ.Internals.BTrace.mode (SOME true);
2417         - Recompile your program.  (I.e., run "CM.make" or "use".)
2418         - You may now turn instrumentation off again (if you want):
2419              SMLofNJ.Internals.BTrace.mode (SOME false);
2420         - Run your program as usual.  If it raises an exception that
2421           reaches the interactive toplevel, then a back-trace will
2422           automatically be printed.  After that, the toplevel loop
2423           will print the exception history as usual.
2424    
2425    ----------------------------------------------------------------------
2426    Name: Matthias Blume
2427    Date: 2000/06/26 09:56:46 JST
2428    Tag: blume-20000626-setup
2429    Description:
2430    
2431    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2432          ML code before and after compiling a file (e.g., to set compiler
2433          flags)
2434    
2435    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2436              - associated changes to btrace.sml (BTrace instrumentation pass)
2437              - cleaner implementation of btimp.sml (BTrace tracing and report
2438                module)
2439    
2440    CM manual: * new path encoding documented
2441               * description of setup-parameter to "sml" added
2442    
2443    The biggest user-visible change to back-tracing is that it is no
2444    longer necessary to compile all traced modules within the same
2445    session.  (This was a real limitation.)
2446    
2447    ----------------------------------------------------------------------
2448    Name: Matthias Blume
2449    Date: 2000/06/24 12:40:00 JST
2450    Tag: blume-20000624-startup
2451    Description:
2452    
2453    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2454    bit too often -- to put it mildly. :)
2455    
2456    ----------------------------------------------------------------------
2457    Name: Matthias Blume
2458    Date: 2000/06/23 18:20:00 JST
2459    Tag: blume-20000623-btrace
2460    Description:
2461    
2462    This updates adds a backtrace facility to aid programmers in debugging
2463    their programs.  This involves the following changes:
2464    
2465    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2466       keeping track of the current call stack.  When programs are compiled
2467       in a special mode, the compiler will insert calls to these hooks
2468       into the user program.
2469       "Hook" means that it is possible for different implementations of
2470       back-tracing to register themselves (at different times).
2471    
2472    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2473       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2474       It can be turned on using this call:
2475         SMLofNJ.Internals.BTrace.mode (SOME true);
2476       Turning it off again:
2477         SMLofNJ.Internals.BTrace.mode (SOME false);
2478       Querying the current status:
2479         SMLofNJ.Internals.BTrace.mode NONE;
2480       Annotated programs are about twice as big as normal ones, and they
2481       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2482       where all hooks do nothing).  The slowdown with a plugin that is
2483       actually useful (such as the one supplied by default) is even greater,
2484       but in the case of the default plugin it is still only an constant
2485       factor (amortized).
2486    
2487    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2488       with a sub-structure BTrace for controlling back-tracing.  In particular,
2489       the above-mentioned function "mode" controls whether the annotation
2490       phase is invoked by the compiler.  Another important function is
2491       "trigger": when called it aborts the current execution and causes
2492       the top-level loop to print a full back-trace.
2493    
2494    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2495       for back-tracing.  It keeps track of the dynamic call stack and in
2496       addition to that it keeps a partial history at each "level" of that
2497       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2498       d and b (at separate times, dynamically), then the report will show:
2499    
2500       GOTO   d
2501             /c
2502       GOTO  \b
2503       CALL   a
2504    
2505       This shows that there was an initial non-tail call of a, then a
2506       tail-call to b or c, looping behavior in a cluster of functions that
2507       consist of b and c, and then a goto from that cluster (i.e., either from
2508       b or from c) to d.
2509    
2510       Note that (depending on the user program) the amount of information
2511       that the back-trace module has to keep track of at each level is bounded
2512       by a constant.  Thus, the whole implementation has the same asymptotical
2513       complexity as the original program (both in space and in time).
2514    
2515    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2516       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2517       which is raised by the "trigger" function mentioned above.
2518    
2519    Notes on usage:
2520    
2521    - Annotated code works well together with unannotated code:
2522    Unannotated calls simply do not show up at all in the backtrace.
2523    
2524    - It is not a good idea to let modules that were annotated during
2525    different sessions run at the same time.  This is because the compiler
2526    chooses small integers to identify individual functions, and there
2527    will be clashes if different modules were compiled in separate sessions.
2528    (Nothing will crash, and you will even be told about the clashes, but
2529    back-trace information will in general not be useful.)
2530    
2531    - Back-tracing can be confused by callcc and capture.
2532    
2533    - The only way of getting a back-trace right now is to explicitly
2534    invoke the "trigger" function from your user program.  Eventually, we
2535    should make every exception carry back-trace information (if
2536    available).  But since this creates more overhead at "raise"-time
2537    (similar to the current exnHistory overhead), I have not yet
2538    implemented this.  (The implementation will be rather easy.)  With
2539    exceptions carrying back-trace information, this facility will be even
2540    more useful because users don't need to modify their programs...
2541    
2542    - While it is possible to compile the compiler with back-trace
2543    annotations turned on (I did it to get some confidence in
2544    correctness), you must make absolutely sure that core.sml and
2545    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2546    be compiled with annotation because there is no core access yet, but
2547    if you compile btimp.sml with annotation, then the system will go into
2548    an infinite recursion and crash.)
2549    Since CM currently does not know about BTrace, the only way to turn
2550    annotations on and off for different modules of the compiler is to
2551    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2552    this is awkward and clumsy.
2553    
2554    Sample sessions:
2555    
2556    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2557    - SMLofNJ.Internals.BTrace.mode (SOME true);
2558    [autoloading]
2559    [autoloading done]
2560    val it = false : bool
2561    - structure X = struct
2562    -     fun main n = let
2563    -         fun a (x, 0) = d x
2564    -           | a (x, n) = b (x, n - 1)
2565    -         and b (x, n) = c (x, n)
2566    -         and c (x, n) = a (x, n)
2567    -         and d x = e (x, 3)
2568    -         and e (x, 0) = f x
2569    -           | e (x, n) = e (x, n - 1)
2570    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2571    -           | f n = n * g (n - 1)
2572    -         and g n = a (n, 3)
2573    -     in
2574    -         f n
2575    -     end
2576    - end;
2577    structure X : sig val main : int -> int end
2578    - X.main 3;
2579    *** BACK-TRACE ***
2580    GOTO   stdIn:4.2-13.20: X.main[2].f
2581    GOTO-( stdIn:4.2-13.20: X.main[2].e
2582    GOTO   stdIn:4.2-13.20: X.main[2].d
2583         / stdIn:4.2-13.20: X.main[2].a
2584         | stdIn:4.2-13.20: X.main[2].b
2585    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2586    CALL   stdIn:4.2-13.20: X.main[2].g
2587    GOTO   stdIn:4.2-13.20: X.main[2].f
2588    GOTO-( stdIn:4.2-13.20: X.main[2].e
2589    GOTO   stdIn:4.2-13.20: X.main[2].d
2590         / stdIn:4.2-13.20: X.main[2].a
2591         | stdIn:4.2-13.20: X.main[2].b
2592    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2593    CALL   stdIn:4.2-13.20: X.main[2].g
2594    GOTO   stdIn:4.2-13.20: X.main[2].f
2595    GOTO-( stdIn:4.2-13.20: X.main[2].e
2596    GOTO   stdIn:4.2-13.20: X.main[2].d
2597         / stdIn:4.2-13.20: X.main[2].a
2598         | stdIn:4.2-13.20: X.main[2].b
2599    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2600    CALL   stdIn:4.2-13.20: X.main[2].g
2601    GOTO   stdIn:4.2-13.20: X.main[2].f
2602    CALL   stdIn:2.15-17.4: X.main[2]
2603    -
2604    
2605    (Note that because of a FLINt bug the above code currently does not
2606    compile without BTrace turned on.)
2607    
2608    Here is another example, using my modified Tiger compiler:
2609    
2610    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2611    - SMLofNJ.Internals.BTrace.mode (SOME true);
2612    [autoloading]
2613    [autoloading done]
2614    val it = false : bool
2615    - CM.make "sources.cm";
2616    [autoloading]
2617    ...
2618    [autoloading done]
2619    [scanning sources.cm]
2620    [parsing (sources.cm):parse.sml]
2621    [creating directory CM/SKEL ...]
2622    [parsing (sources.cm):tiger.lex.sml]
2623    ...
2624    [wrote CM/sparc-unix/semant.sml]
2625    [compiling (sources.cm):main.sml]
2626    [wrote CM/sparc-unix/main.sml]
2627    [New bindings added.]
2628    val it = true : bool
2629    - Main.compile ("../testcases/merge.tig", "foo.out");
2630    *** BACK-TRACE ***
2631    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2632    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2633    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2634    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2635    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2636    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2637    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2638         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2639    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2640    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2641    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2642    CALL   main.sml:1.18-118.4: Main.compile[2]
2643    -
2644    
2645    ----------------------------------------------------------------------
2646    Name: Matthias Blumen
2647    Date: 2000/06/21 18:00:00 JST
2648    Tag: blume-20000621-manual
2649    Description:
2650    
2651    CM manual update: Path environments documented.
2652    
2653    ----------------------------------------------------------------------
2654    Name: Matthias Blume
2655    Date: 2000/06/19 13:40:00
2656    Tag: blume-20000619-manual
2657    Description:
2658    
2659    CM manual and system/README update.  This only covers the fact that
2660    there are no more implicit anchors.  (Path environments and the "bind"
2661    option to "cm" have yet to be documented.)
2662    
2663    ----------------------------------------------------------------------
2664    Name: Matthias Blume
2665    Date: 2000/06/19 11:05:00 JST
2666    Tag: blume-20000619-chdir-bugfix
2667    Description:
2668    
2669    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2670    
2671    ----------------------------------------------------------------------
2672    Name: Matthias Blume
2673    Date: 2000/06/18 22:00:10 JST
2674    Tag: blume-20000618-implicit-anchors-really-gone
2675    Description:
2676    
2677    I updates the previous HISTORY entry where I forgot to mention that
2678    implicit anchors are no longer with us.
2679    
2680    The current update also gets rid of the (now useless) controller
2681    CM.Control.implicit_anchors.
2682    
2683    ----------------------------------------------------------------------
2684    Name: Matthias Blume
2685    Date: 2000/06/16 17:30:00 JST
2686    Tag: blume-20000616-anchorenv
2687    Description:
2688    
2689    This patch implements the long anticipated (just kidding :) "anchor
2690    environment" mechanism.  In the course of doing this, I also
2691    re-implemented CM's internal "SrcPath" module from scratch.  The new
2692    one should be more robust in certain boundary cases.  In any case, it
2693    is a lot cleaner than its predecessor (IMHO).
2694    
2695    This time, although there is yet another boot file format change, I
2696    kept the unpickler backward-compatible.  As a result, no new bootfiles
2697    are necessary and bootstrapping is straightforward.  (You cannot read
2698    new bootfiles into an old system, but the other way around is no
2699    problem.)
2700    
2701    Visible changes:
2702    
2703    ** 0. Implicit path anchors (without the leading $-symbol) are no
2704    longer recognized at all. This means that such path names are not
2705    illegal either.  For example, the name basis.cm simply refers to a
2706    local file called "basis.cm" (i.e, the name is an ordinary path
2707    relative to .cm-files directory).  Or, to put it differently, only
2708    names that start with $ are anchored paths.
2709    
2710    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2711    vanished.
2712    
2713    John (Reppy) had critizised this as soon as I originally proposed and
2714    implemented it, but at that time I did not really deeply believe
2715    him. :) Now I came full-circle because I need the $<singlearc> syntax
2716    in another place where it cannot be seen as an abbreviation for
2717    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2718    seems to mean (i.e., it "expands" into the corresponding anchor
2719    value).
2720    
2721    However, when paths are used as members in CM description files, it
2722    continues to be true that there must be at least another arc after the
2723    anchor.  This is now enforced separately during semantic analysis
2724    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2725    
2726    ** 2. The "cm" class now accepts an option "bind".  The option's value
2727    is a sub-option list of precisely two items -- one labeled "anchor"
2728    and the other one labeled "value".  As you might expect, "anchor" is
2729    used to specify an anchor name to be bound, and "value" specifies what
2730    the anchor is being bound to.
2731    
2732    The value must be a directory name and can be given in either standard
2733    syntax (including the possibility that it is itself an anchored path)
2734    or native syntax.
2735    
2736    Examples:
2737    
2738       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2739       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2740    
2741    and so on.
2742    
2743    The meaning of this is that the .cm-file will be processed with an
2744    augmented anchor environment where the given anchor(s) is/are bound to
2745    the given values(s).
2746    
2747    The rationale for having this feature is this: Suppose you are trying
2748    to use two different (already stable) libraries a.cm and b.cm (that
2749    you perhaps didn't write yourself).  Further, suppose each of these
2750    two libraries internally uses its own auxiliary library $aux/lib.cm.
2751    Normally you would now have a problem because the anchor "lib" can not
2752    be bound to more than one value globally.  Therefore, the project that
2753    uses both a.cm and b.cm must locally redirect the anchor to some other
2754    place:
2755    
2756       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2757       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2758    
2759    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2760    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2761    
2762    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2763    you when you do so at the time of CM.stabilize).  Therefore, you can
2764    also use an anchored path as the value:
2765    
2766      a.cm (bind:(anchor:lib value:$a-lib))
2767      b.cm (bind:(anchor:lib value:$b-lib))
2768    
2769    Now you can globally configure (using the usual CM.Anchor.anchor or
2770    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2771    itself is always locally bound, setting it globally is no longer
2772    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2773    can still be used as a global anchor for separate purposes.  As a
2774    matter of fact, one can locally define "lib" in terms of a global
2775    "lib":
2776    
2777      a.cm (bind:(anchor:lib value:$lib/a))
2778      b.cm (bind:(anchor:lib value:$lib/b))
2779    
2780    ** 3: The encoding of path names has changed.  This affects the way
2781    path names are shown in CM's progress report and also the internal
2782    protocol encoding used for parallel make.
2783    
2784    The encoding now uses one or more ':'-separated segments.  Each
2785    segments corresponds to a file that has been specified relative to the
2786    file given by its preceding segment.  The first segment is either
2787    relative to the CWD, absolute, or anchored.  Each segment itself is
2788    basically a Unix pathname; all segments but the first are relative.
2789    
2790    Example:
2791    
2792       $foo/bar/baz.cm:a/b/c.sml
2793    
2794    This path denotes the file bar/a/b/c.sml relative to the directory
2795    denoted by anchor "foo".  Notice that the encoding also includes
2796    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2797    paths are resolved relative to the .cm-files directory, so baz.cm must
2798    be ignored to get the "real" pathname.
2799    
2800    To make this fact more obvious, CM puts the names of such "virtual
2801    arcs" into parentheses when they appear in progress reports. (No
2802    parentheses will appear in the internal protocol encoding.)  Thus,
2803    what you really see is:
2804    
2805      $foo/bar/(baz.cm):a/b/c.sml
2806    
2807    I find this notation to be much more informative than before.
2808    
2809    Another new feature of the encoding is that special characters
2810    including parentheses, colons, (back)slashes, and white space are
2811    written as \ddd (where ddd is the decimal encoding of the character).
2812    
2813    *** The CM manual still needs to be updated.
2814    
2815    ----------------------------------------------------------------------
2816    Name: Allen Leung
2817    Date: 2000/06/15 00:38:00
2818    Tag: leunga-20000615-x86-peephole
2819    
2820    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2821    
2822    ----------------------------------------------------------------------
2823    Name: Matthias Blume
2824    Date: 2000/06/12 11:40:00
2825    Tag: blume-20000612-parmakefix
2826    Description:
2827    
2828    More cleanup after changing the file naming scheme: This time I
2829    repaired the parallel make mechanism for CMB.make which I broke earlier.
2830    
2831    ----------------------------------------------------------------------
2832    Name: Allen Leung
2833    Date: 2000/06/09 01:25:00
2834    Tag: leunga-20000609-various
2835    
2836    None of these things should affect normal SML/NJ operations
2837    
2838    1. Peephole improvements provided by Fermin (c--)
2839    2. New annotation DEFUSE for adding extra dependence (moby)
2840    3. New X86 LOCK instructions (moby)
2841    4. New machine description language for reservation tables (scheduling)
2842    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2843       trees etc.)
2844    6. I've changed the CM files so that they can work with versions
2845       110.0.6, 110.25 and 110.28
2846    
2847    ----------------------------------------------------------------------
2848    Name: Matthias Blume
2849    Date: 2000/06/09 12:40:00
2850    Tag: blume-20000609-log
2851    Description:
2852    
2853    - Removed all(?) remaining RCS Log entries from sources.
2854    
2855    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2856      anchored paths).
2857    
2858    ----------------------------------------------------------------------
2859    Name: Matthias Blume
2860    Date: 2000/06/07 17:00:00 JST
2861    Tag: blume-20000607-no-implicit-anchors
2862    Description:
2863    
2864    1. This update changes the default setting for
2865    CM.Control.implicit_anchors from true to false.  This means that
2866    implicit anchors are no longer permitted by default.  I also tried to
2867    make sure that nothing else still relies on implicit anchors.
2868    (This is the next step on the schedule towards a CM that does not even
2869    have the notion of implicit anchors anymore.)
2870    
2871    2. More CM manual updates.
2872    
2873    3. I managed to track down and fix the pickling bug I mentioned last
2874    time.  Because of the previously existing workaround, this entails no
2875    immediate practical changes.
2876    
2877    ----------------------------------------------------------------------
2878    Name: Matthias Blume
2879    Date: 2000/06/06 11:15:00 JST
2880    Tag: blume-20000606-lazierpickle
2881    Description:
2882    
2883    !!!! NEW BOOT FILES !!!!
2884    
2885    * The main purpose of this update is to make library pickles lazier in
2886    order to reduce the initial space penalty for autoloading a library.
2887    As a result, it is now possible to have $smlnj/compiler.cm
2888    pre-registered.  This should take care of the many complaints or
2889    inquiries about missing structure Compiler.  This required changes to
2890    CM's internal data structures and small tweaks to some algorithms.
2891    
2892    As a neat additional effect, it is no longer necessary (for the sake
2893    of lean heap image files) to distinguish between a "minimal" CM and a
2894    "full" CM.  Now, there is only one CM (i.e., the "full" version:
2895    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2896    interactive top level. ($smlnj/cm/minimal.cm is gone.)
2897    
2898    To make the life of compiler-hackers easier, "makeml" now also
2899    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
2900    words, after you bootstrap a new sml for the first time, you will not
2901    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
2902    around you will still have to do it, though.)
2903    
2904    * A second change consists of major updates to the CM manual.  There
2905    are now several appendices with summary information and also a full
2906    specification of the CM description file syntax.
2907    
2908    * In directory src/system I added the script "allcross".  This script
2909    invokes sml and cross-compiles the compiler for all supported
2910    architectures.  (Useful when providing a new set of boot files.)
2911    
2912    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
2913    added a small tweak to pickle-util.sml to work around this problem,
2914    but it is not a proper fix yet.  I will investigate further.  (The
2915    effect of the bug was an inflation of library pickle size.)
2916    
2917    * Version number increased to 110.28.1 (to avoid compatibility problems).
2918    
2919    ----------------------------------------------------------------------
2920    Name: Allen Leung
2921    Date: 2000/05/25 17:28 EDT
2922    Tag: leunga-20000525-ra
2923    Description:
2924    
2925      Fixed a bug in freezing phase of the register allocator.
2926    
2927    ----------------------------------------------------------------------
2928    Name: Allen Leung
2929    Date: 2000/05/15 22:53 EDT
2930    Tag: leunga-20000515-alpha-x86-ra
2931    Description:
2932    
2933      1. Alpha
2934    
2935          Slight cleanup.  Removed the instruction SGNXL
2936    
2937      2. X86
2938    
2939          Added the following instructions to the instruction set:
2940    
2941            ROLx, RORx,
2942            BTx, BTSx, BTLx, BTRx,
2943            XCHGx, and variants with the LOCK prefix
2944    
2945      3. Register Allocation
2946    
2947          The module ra-rewrite-with-renaming has been improved.
2948    
2949      These have no effect on SML/NJ.
2950    
2951    ----------------------------------------------------------------------
2952    Name: Matthias Blume
2953    Date: 2000/05/15 16:20:00 JST
2954    Tag: blume-20000515-lightrebuild
2955    Description:
2956    
2957    1. I added an alternative to "-rebuild" to "makeml".  The difference is
2958       that prior to calling CMB.make' the CM-variable "LIGHT" will be
2959       defined.  In effect, the command will not build any cross-compiler
2960       backends and therefore finish more quickly.
2961    
2962       The "fixpt" script also takes a "-light" switch to be able to use
2963       this new facility while compiling for a fixpoint.
2964    
2965    2. I replaced all mentions of anchored paths in group owner specifications
2966       with simple relative paths (usually starting with "..").
2967       The rationale is that a library's internal workings should not be
2968       compromised by the lack of some anchor.  (An anchor is necessary
2969       for someone who wants to refer to the library by an anchored path,
2970       but it should not be necessary to build the same library in the first
2971       place.)
2972    
2973    3. I changed the way CM's tool mechanism determines the shell command
2974       string used for things like ml-yacc etc. so that it does not break
2975       when CM.Control.implicit_anchors is turned off.
2976    
2977    ----------------------------------------------------------------------
2978    Name: Matthias Blume
2979    Date: 2000/05/12 18:20:00 JST
2980    Tag: blume-20000512-ml-build
2981    Description:
2982    
2983    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
2984    getting installed properly (by config/install.sh).
2985    
2986    ----------------------------------------------------------------------
2987    Name: Matthias Blume
2988    Date: 2000/05/12 17:30:00 JST
2989    Tag: blume-20000512-anchors
2990    Description:
2991    
2992    !!! NEW BOOT FILES !!!
2993    
2994    This change is in preparation of fading out support for "implicitly
2995    anchored path names".  I went through all sources and used the
2996    explicit (and relatively new) $-notation.  See system/README and the
2997    CM manual for more info on this.
2998    
2999    I also modified the anchoring scheme for some things such as "smlnj",
3000    "MLRISC", "cm", etc. to take advantage of the fact that explicit
3001    anchors are more expressive: anchor name and first arc do not have to
3002    coincide.  This entails the following user-visible change:
3003    
3004    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
3005    particular, when you fire up sml with a command-line argument, say,
3006    e.g.:
3007    
3008       sml '$smlnj/cmb.cm'
3009    
3010    At the ML toplevel prompt:
3011    
3012       CM.autoload "$smlnj/cmb.cm";
3013    
3014    There is also a new controller in CM.Control that can be used to turn
3015    off all remaining support for implicit anchors by saying:
3016    
3017        CM.autoload "$smlnj/
3018        #set CM.Control.implicit_anchors false;
3019    
3020    This causes CM to reject implicitly anchored paths.  This is (for the
3021    time being) less permissive than the "final" version where there will
3022    be no more such implicit anchors and relative paths will be just that:
3023    relative.
3024    
3025    The next step (version after next version?) will be to make the
3026    default for CM.Control.implicit_anchors false.  After the dust has
3027    settled, I can then produce the "final" version of this...
3028    
3029    Note: Since bootstrapping is a bit tricky, I provided new boot files.
3030    
3031    ----------------------------------------------------------------------
3032    Name: Matthias Blume
3033    Date: 2000/05/11 16:30:00 JST
3034    Tag: blume-20000511-sources
3035    Description:
3036    
3037    The main change is that I added function CM.sources as a generalized
3038    version of the earlier CM.makedepend.  This entails the following
3039    additional changes:
3040    
3041      - CM.makedepend has been dropped.
3042    
3043      - CM manual has been updated.
3044    
3045      - TOOLS signature and API have been changed.
3046    
3047    ----------------------------------------------------------------------
3048    Name: Allen Leung
3049    Date: 2000/05/10 21:17 EDT
3050    Tag: leunga-20000510-moby-c--ssa
3051    Description:
3052    
3053      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3054    None of these affect SML/NJ.
3055    
3056    1. Register Allocation
3057    
3058        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3059           This module tries to remove local (i.e. basic block level) redundancies
3060           during spilling.
3061    
3062        b. A new framework for performing region based register allocation.
3063           Not yet entirely functional.
3064    
3065    2. X86
3066    
3067       a. DefUse for POP was missing the stack pointer [found by Lal]
3068       b. Reload for CALL was incorrect in X86Spill [found by John]
3069       c. Various fixes in X86Spill so that it can be used correctly for
3070          the new spilling module.
3071    
3072    3. SSA/IR
3073    
3074       a. New module ir/dj-dataflow.sml implements elimination based
3075          data flow analysis.
3076    
3077    4. MLRiscGen
3078    
3079       a. Fix for gc type annotation
3080    
3081    5. MDGen
3082    
3083       Various fixes for machine description -> ml code translation.  For ssa
3084       only.
3085    
3086    ----------------------------------------------------------------------
3087    Name: Allen Leung
3088    Date: 2000/05/08 22:17 EDT
3089    Tag: leunga-20000508-labexp
3090    Description:
3091    
3092      Fermin has found a few assembly problems with constant expressions
3093      generated in LabelExp.  Mostly, the problems involve extra parentheses,
3094      which choke on dumb assemblers.  This is his fix.
3095    
3096    ----------------------------------------------------------------------
3097    Name: Dave MacQueen
3098    Date: 2000/04/09 14:00 EDT
3099    Tag: dbm-20000502-Version_110_28
3100    Description:
3101    
3102    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
3103    
3104    2. Updated config/version to 110.28
3105    
3106    3. Updated config/srcarchiveurl
3107    
3108    3. New boot files!
3109       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
3110    
3111    ----------------------------------------------------------------------
3112    Name: Matthias Blume
3113    Date: 2000/05/01 19:05:00 JST
3114    Tag: blume-20000501-noweb
3115    Description:
3116    
3117    A new noweb tool has been added.  The existing system is entirely
3118    unaffected by this, but some CM users have asked for renewed noweb
3119    support.  Everything is documented in the CM manual.
3120    
3121    New (plugin) libraries:
3122    
3123       noweb-tool.cm
3124       nw-ext.cm
3125    
3126    ----------------------------------------------------------------------
3127    Name: Dave MacQueen
3128    Date: 2000/04/30 12:40PM EDT
3129    Tag: dbm-20000430-bug_fixes
3130    Description:
3131    
3132    1. Fix for bug 1498
3133       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
3134       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
3135         added toRealArray function
3136       smlnj/src/compiler/MiscUtil/print/ppobj.sml
3137         added check for tag Obj.RealArray to array printing case in ppObj
3138    
3139    2. Fix for bug 1510
3140       smlnj/src/compiler/Semant/types/typesutil.sml
3141         fixed definition of dummyargs (used by equalTycon) so that
3142         dummy args are distinct types
3143    
3144    ----------------------------------------------------------------------
3145    Name: Matthias Blume
3146    Date: 2000/04/30 01:00:00 JST
3147    Tag: blume-20000430-versions
3148    Description:
3149    
3150    1. CM version numbering added.  This is an implementation of Lal's
3151       proposal for adding version numbers and version checking to .cm
3152       files.  Lal said that his proposal was just that -- a proposal.
3153       For the time being I went ahead and implemented it so that people
3154       can comment on it.  Everything is completely backward-compatible
3155       (except for the stable library format, i.e., new bootfiles!).
3156    
3157       As usual, see the CM manual for details.
3158    
3159    2. An alternative syntax for anchored paths has been implemented.
3160       Dave has recently voiced the same concerns that I had when I did
3161       this, so there should be some support.  My take is that eventually
3162       I will let support for the current syntax (where anchors are
3163       "implicit") fade out in favor of the new, explicit syntax.
3164       In order to be backward-compatible, both old and new syntax are
3165       currently supported.
3166    
3167       Again, see the CM manual for details.
3168    
3169    3. Parallel make is trying to be slightly smarter:  When the master
3170       process finds a "bottleneck", i.e., when there is only one
3171       compilation unit that can be compiled and everybody else is
3172       waiting on it, then it will simply compile it directly instead
3173       of clumsily telling one of the slaves to do it.
3174    
3175    4. Support for "unsharing" added.  This is necessary in order to be
3176       able to have two different versions of the same library running
3177       at the same time (e.g., for trying out a new MLRISC while still
3178       having the old MLRISC linked into the current compiler, etc.)
3179       See the CM manual.
3180    
3181    5. Simple "makedepend" functionality added for generating Makefile
3182       dependency information.  (This is rather crude at the moment.
3183       Expect some changes here in the future.)
3184    
3185    6. ".fun" added as a recognized suffix for ML files. Also documented
3186       explicitly in the manual that the fallback behavior (unknown suffix
3187       -> ML file) is not an official feature!
3188    
3189    7. Small changes to the pickler for stable libraries.
3190    
3191    8. Several internal changes to CM (for cleanup/improvement).
3192    
3193    
3194    !!!! NEW BINFILES !!!!
3195    
3196    ----------------------------------------------------------------------
3197    Name: Matthias Blume
3198    Date: 2000/04/28 17:30:00 JST
3199    Tag: blume-20000428-pathconfig
3200    Description:
3201    
3202    1. I changed config/install.sh to remove duplicate entries from the
3203       lib/pathconfig file at the end.  Moreover, the final version of
3204       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
3205       in src/system/installml.
3206    
3207    2. The config/install.sh script now consistently uses relative
3208       pathnames in lib/pathconfig whenever the anchor is in the lib
3209       directory.  (So far this was true for the libraries that come
3210       pre-compiled and bundled as part of the bootfiles but not for
3211       libraries that are compiled by the script itself.)
3212    
3213    ----------------------------------------------------------------------
3214    Name: Matthias Blume
3215    Date: 2000/04/26 13:10:00 JST
3216    Tag: blume-20000426-fun_suffix
3217    Description:
3218    
3219    Added ".fun" as a recognized file name suffix (for ML code).
3220    
3221    ----------------------------------------------------------------------
3222    Name: Allen Leung
3223    Date: 2000/04/25 17:00:00 EST
3224    Tag: leunga-20000425-alpha-ra
3225    Description:
3226    
3227    1. Alpha
3228    
3229        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
3230    in C--.
3231    
3232    2. RA
3233    
3234       Added a flag "ra-dump-size" to print out the size of the flowgraph
3235       and the interference graph.
3236    
3237    ----------------------------------------------------------------------
3238    Name: Dave MacQueen
3239    Date: 2000/04/25/
3240    Tag: dbm-20000425-mlyacc_doc_examples
3241    Description:
3242      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
3243      Updated all three examples in src/ml-yacc/examples to run
3244      under 110.* using CM.make.
3245    
3246  ----------------------------------------------------------------------  ----------------------------------------------------------------------
3247  Name: Allen Leung  Name: Allen Leung
3248  Date: 2000/04/20 23:04:00 EST  Date: 2000/04/20 23:04:00 EST
# Line 27  Line 3259 
3259    
3260              s <- t              s <- t
3261    
3262        no interference edge between s and t are added for this definition of s.        no interference edge between s and t is added for this definition of s.
3263    
3264     b. I've added two new spill heuristic modules that Fermin and I developed     b. I've added two new spill heuristic modules that Fermin and I developed
3265        (in the new library RA.cm). These are unused in SML/NJ but maybe        (in the new library RA.cm). These are unused in SML/NJ but maybe
# Line 175  Line 3407 
3407    
3408  3.  Assembly  3.  Assembly
3409    
3410      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
3411      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
3412      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
3413    
# Line 198  Line 3430 
3430    
3431  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
3432  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
3433  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
3434  legal surface-syntax symbol).  legal surface-syntax symbol).
3435    
3436  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 208  Line 3440 
3440  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
3441    
3442  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3443  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
3444  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
3445  more details.  more details.
3446    
# Line 323  Line 3555 
3555     (specified in the .cm file at each instance where the tool's class is     (specified in the .cm file at each instance where the tool's class is
3556     used).     used).
3557    
3558     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3559     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3560     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3561    
3562     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 336  Line 3568 
3568    
3569     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3570    
3571     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3572     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3573    
3574  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 367  Line 3599 
3599       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3600       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3601       Please, don't be too harsh on me for messing with this code a bit more       Please, don't be too harsh on me for messing with this code a bit more
3602       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3603       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3604       Dave's hands. :)       Dave's hands. :)
3605    
# Line 470  Line 3702 
3702    
3703       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3704       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3705       testl is perferable to andl.       testl is preferable to andl.
3706    
3707  7. RA (x86 only)  7. RA (x86 only)
3708    
# Line 652  Line 3884 
3884    
3885  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3886  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3887  specifiel the layout of the tool command line.  See the CM manual for  specifies the layout of the tool command line.  See the CM manual for
3888  explanation.  explanation.
3889    
3890  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3891  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3892  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3893  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 699  Line 3931 
3931  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
3932  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,
3933  they might be the result of an earlier partial run of fixpt (which  they might be the result of an earlier partial run of fixpt (which
3934  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3935  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3936  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3937    
# Line 749  Line 3981 
3981    it from that remote directory.    it from that remote directory.
3982    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3983    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3984    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3985    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3986    
3987    For CVS users, this mechanism is not relevant for source archives, but    For CVS users, this mechanism is not relevant for source archives, but

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