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revision 656, Fri Jun 9 03:39:04 2000 UTC revision 1040, Mon Jan 28 16:55:24 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: Matthias Blume
17    Date: 2002/01/28 12:00:00
18    Tag: Release_110_38
19    Description:
20    
21    This time for real!!!
22    
23    ----------------------------------------------------------------------
24    Name: Matthias Blume
25    Date: 2002/01/28 10:56:00 EST
26    Tag: blume-20020128-retraction
27    Description:
28    
29    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
30       with blume-Release_110_38-retracted.)
31    
32    1. Fixed a problem with incorrect rounding modes in real64.sml.
33       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
34    
35    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
36       and enums fixed.  The naming of corresponding ML identifiers should
37       now be consistent again.
38    
39    ----------------------------------------------------------------------
40    Name: Allen Leung
41    Date: 2002/01/27
42    Tag: leunga-20020127-nowhere
43    Description:
44    
45       Added a target called nowhere in the configuration scripts.
46       Enabling this will build the MLRISC 'nowhere' tool (for translating
47       programs with where-clauses into legal SML code) during installation.
48    
49    ----------------------------------------------------------------------
50    Name: Matthias Blume
51    Date: 2002/01/25 21:27:00 EST
52    Tag: blume-Release_110_38-retracted
53    Description:
54    
55    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
56    
57    README will be added later.
58    
59    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
60    (Release_110_38) removed.  Reason: Last-minute bug fixes.
61    
62    ----------------------------------------------------------------------
63    Name: Matthias Blume
64    Date: 2002/01/25
65    Tag: blume-20020125-ffi
66    Description:
67    
68    A large number of tweaks and improvements to ml-nlffi-lib and
69    ml-nlffigen:
70    
71       - ML represenation types have been streamlined
72       - getter and setter functions work with concrete values, not abstract
73         ones where possible
74       - ml-nlffigen command line more flexible (see README file there)
75       - some bugs have been fixed (hopefully)
76    
77    ----------------------------------------------------------------------
78    Name: Lal George
79    Date: 2002/01/24
80    Tag: george-20020124-risc-ra-interface
81    Description:
82    
83       There is a dramatic simplification in the interface to the
84       register allocator for RISC architectures as a result of making
85       parallel copy instructions explicit.
86    
87    ----------------------------------------------------------------------
88    Name: Matthias Blume
89    Date: 2002/01/22
90    Tag: blume-20020122-x86-ccalls
91    Description:
92    
93    Bug fix for c-calls on x86 (having to do with how char- and
94    short-arguments are being handled).
95    
96    ----------------------------------------------------------------------
97    Name: Matthias Blume
98    Date: 2002/01/21
99    Tag: blume-20020121-ff
100    Description:
101    
102    Another day of fiddling with the FFI...
103    
104    1. Bug fix/workaround:  CKIT does not complain about negative array
105       dimensions, so ml-nlffigen has to guard itself against this possibility.
106       (Otherwise a negative dimension would send it into an infinite loop.)
107    
108    2. Some of the abstract types (light objects, light pointers, most "base"
109       types) in structure C are now eqtypes.
110    
111    3. Added constructors and test functions for NULL function pointers.
112    
113    ----------------------------------------------------------------------
114    Name: Matthias Blume
115    Date: 2002/01/18
116    Tag: blume-20020118-ready-for-new-release
117    Description:
118    
119    Made config/srcarchiveurl point to a new place.  (Will provide boot
120    files shortly.)
121    
122    Maybe we christen this to be 110.38?
123    
124    ----------------------------------------------------------------------
125    Name: Matthias Blume
126    Date: 2002/01/18
127    Tag: blume-20020118-more-ffifiddle
128    Description:
129    
130    Today's FFI fiddling:
131    
132      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
133        C.Set.* that use concrete (MLRep.*) arguments and results instead
134        of abstract ones.
135    
136      - Provided word-style bit operations etc. for "int" representation
137        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
138        and Long.
139    
140    ----------------------------------------------------------------------
141    Name: Matthias Blume
142    Date: 2002/01/18
143    Tag: blume-20020118-use-x86-fp
144    Description:
145    
146    Now that x86-fast-fp seems to be working, I turned it back on again
147    by default.  (Seems to work fine now, even with the FFI.)
148    
149    Other than that, I added some documentation about the FFI to
150    src/ml-nlffigen/README and updated the FFI test examples in
151    src/ml-nlffi-lib/Tests/*.
152    
153    ----------------------------------------------------------------------
154    Name: Allen Leung
155    Date: 2002/01/17
156    Tag: leunga-20020117-x86-fast-fp-call
157    Description:
158    
159       1. Fixed a problem with handling return fp values when x86's fast fp
160          mode is turned on.
161    
162       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
163          of %f32.
164    
165       3. Added a constructor INT32lit to the ast of MLRISC tools.
166    
167    ----------------------------------------------------------------------
168    Name: Matthias Blume
169    Date: 2002/01/16
170    Tag: blume-20020116-ffifiddle
171    Description:
172    
173    More fiddling with the FFI interface:
174    
175     - Make constness 'c instead of rw wherever possible.  This eliminates
176       the need for certain explicit coercions.  (However, due to ML's
177       value polymorphism, there will still be many cases where explicit
178       coercions are necessary.  Phantom types are not the whole answer
179       to modeling a subtyping relationship in ML.)
180    
181     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
182    
183     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
184       clumsy workaround for varargs problem.)
185    
186    ----------------------------------------------------------------------
187    Name: Lal George
188    Date: 2002/01/15
189    Tag: <none>
190    Description:
191    
192    1. Since COPY instructions are no longer native to the architecture,
193       a generic functor can be used to implement the expandCopies function.
194    
195    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
196       TEXT segment.
197    
198    ----------------------------------------------------------------------
199    Name: Matthias Blume
200    Date: 2002/01/15
201    Tag: blume-20020115-ffiupdates
202    Description:
203    
204    1. Fix for bug resulting in single-precision float values being returned
205       incorrectly from FFI calls.
206    
207    2. Small modifications to C FFI API:
208    
209        - memory-allocation routines return straight objects (no options)
210          and raise an exception in out-of-memory situations
211        - unsafe extensions to cast between function pointers and pointers
212          from/to ints
213        - added structure C_Debug as an alternative to structure C where
214          pointer-dereferencing (|*| and |*!) always check for null-pointers
215        - added open_lib' to DynLinkage;  open_lib' works like open_lib
216          but also takes a (possibly empty) list of existing library handles
217          that the current library depends on
218    
219    ----------------------------------------------------------------------
220    Name: Matthias Blume
221    Date: 2002/01/10
222    Tag: blume-20020110-newffigen
223    Description:
224    
225    1. Updates to portable graph code.
226    
227    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
228       more scalable now so that even huge interfaces such as the one
229       for GTK compile in finite time and space. :-)
230       See src/ml-nlffigen/README for details on what's new.
231    
232    ----------------------------------------------------------------------
233    Name: Lal George
234    Date: 2001/01/09 14:31:35 EST 2002
235    Tag: george-20011206-rm-native-copy
236    Description:
237    
238            Removed the native COPY and FCOPY instructions
239            from all the architectures and replaced it with the
240            explicit COPY instruction from the previous commit.
241    
242            It is now possible to simplify many of the optimizations
243            modules that manipulate copies. This has not been
244            done in this change.
245    
246    ----------------------------------------------------------------------
247    Name: Lal George
248    Date: 2001/12/06 16:50:13 EST 2001
249    Tag: george-20011206-mlrisc-instruction
250    Description:
251    
252    Changed the representation of instructions from being fully abstract
253    to being partially concrete. That is to say:
254    
255      from
256            type instruction
257    
258      to
259            type instr                              (* machine instruction *)
260    
261            datatype instruction =
262                LIVE of {regs: C.cellset, spilled: C.cellset}
263              | KILL of {regs: C.cellset, spilled: C.cellset}
264              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
265              | ANNOTATION of {i: instruction, a: Annotations.annotation}
266              | INSTR of instr
267    
268    This makes the handling of certain special instructions that appear on
269    all architectures easier and uniform.
270    
271    LIVE and KILL say that a list of registers are live or killed at the
272    program point where they appear. No spill code is generated when an
273    element of the 'regs' field is spilled, but the register is moved to
274    the 'spilled' (which is present, more for debugging than anything else).
275    
276    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
277    We used to generate:
278    
279            DEFFREG f1
280            f1 := f2 + f3
281            trapb
282    
283    but now generate:
284    
285            f1 := f2 + f3
286            trapb
287            LIVE {regs=[f1,f2,f3], spilled=[]}
288    
289    Furthermore, the DEFFREG (hack) required that all floating point instruction
290    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
291    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
292    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
293    this architecture).
294    
295    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
296    all the architectures. This will result in further simplification of the
297    register allocator that must be aware of them for coalescing purposes, and
298    will also simplify certain aspects of the machine description that provides
299    callbacks related to parallel copies.
300    
301    ANNOTATION should be obvious, and now INSTR represents the honest to God
302    machine instruction set!
303    
304    The <arch>/instructions/<arch>Instr.sml files define certain utility
305    functions for making porting easier -- essentially converting upper case
306    to lower case. All machine instructions (of type instr) are in upper case,
307    and the lower case form generates an MLRISC instruction. For example on
308    the alpha we have:
309    
310      datatype instr =
311         LDA of {r:cell, b:cell, d:operand}
312       | ...
313    
314      val lda : {r:cell, b:cell, d:operand} -> instruction
315        ...
316    
317    where lda is just (INSTR o LDA), etc.
318    
319    ----------------------------------------------------------------------
320    Name: Matthias Blume
321    Date: 2001/11/22 21:40:00 EST
322    Tag: Release_110_37
323    Description:
324    
325    Release 110.37.  This time for real.
326    
327    ----------------------------------------------------------------------
328    Name: Matthias Blume
329    Date: 2001/11/21 16:35:00 EST
330    Tag: blume-20011121-foot-in-mouth
331    Description:
332    
333    Removed the "Release_110_37" tag because of a serious bug.
334    This will be re-tagged once the bug is fixed.
335    
336    ----------------------------------------------------------------------
337    Name: Matthias Blume
338    Date: 2001/11/21 16:14:00 EST
339    Tag: blume-20011121-forgottenfile
340    Description:
341    
342    Forgot to add a file.  (Just a .tex-file -- part of
343    the CM manual source.)
344    
345    ----------------------------------------------------------------------
346    Name: Matthias Blume
347    Date: 2001/11/21 16:10:00 EST
348    Tag: blume-20011121-invalid_110_37
349    Description:
350    
351    Note: I removed the original tag "Release_110_37" from this commit
352          because we found a serious bug in all non-x86 backends.
353          - Matthias
354    
355    1. Modifications to the SML/NJ code generator and to the runtime system
356       so that code object name strings are directly inserted into code
357       objects at code generation time.  The only business the runtime system
358       has with this is now to read the name strings on occasions.
359       (The encoding of the name string has also changed somewhat.)
360    
361    2. CM now implements a simple "set calculus" for specifying export lists.
362       In particular, it is now possible to refer to the export lists of
363       other libraries/groups/sources and form unions as well as differences.
364       See the latest CM manual for details.
365    
366    3. An separate notion of "proxy" libraries has again be eliminated from
367       CM's model.  (Proxy libraries are now simply a special case of using
368       the export list calculus.)
369    
370    4. Some of the existing libraries now take advantage of the new set
371       calculus.
372       (Notice that not all libraries have been converted because some
373       of the existing .cm-files are supposed to be backward compatible
374       with 110.0.x.)
375    
376    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
377       "General.exnMessage"!  The former relies on a certain hook to be
378       initialized, and that often does not happen in the stand-alone case.)
379    
380    ----------------------------------------------------------------------
381    Name: Lal George
382    Date: 2001/11/21  13:56:18 EST
383    Tag: george-2001121-pseudo-ops
384    Description:
385    
386      Implemented a complete redesign of MLRISC pseudo-ops. Now there
387      ought to never be any question of incompatabilities with
388      pseudo-op syntax expected by host assemblers.
389    
390      For now, only modules supporting GAS syntax are implemented
391      but more should follow, such as MASM, and vendor assembler
392      syntax, e.g. IBM as, Sun as, etc.
393    
394    ----------------------------------------------------------------------
395    Name: Matthias Blume
396    Date: 2001/11/14 11:52:00 EST
397    Tag: blume-20011114-srcname
398    Description:
399    
400    1. Routed the name of the current source file to mlriscgen where it
401       should be directly emitted into the code object.  (This last part
402       is yet to be done.)
403    
404    2. Some cleanup of the pgraph code to make it match the proposal that
405       I put out the other day.  (The proposal notwithstanding, things are
406       still in flux here.)
407    
408    ----------------------------------------------------------------------
409    Name: Lal George
410    Date: 2001/11/14 09:44:04 EST
411    Tag:
412    Description:
413    
414      Fix for a backpatching bug reported by Allen.
415    
416      Because the boundary between short and long span-dependent
417      instructions is +/- 128, there are an astounding number of
418      span-dependent instructions whose size is over estimated.
419    
420      Allen came up with the idea of letting the size of span
421      dependent instructions be non-monotonic, for a maxIter
422      number of times, after which the size must be monotonically
423      increasing.
424    
425      This table shows the number of span-dependent instructions
426      whose size was over-estimated as a function of maxIter, for the
427      file Parse/parse/ml.grm.sml:
428    
429         maxIter            # of instructions:
430            10                      687
431            20                      438
432            30                      198
433            40                        0
434    
435      In compiling the compiler, there is no significant difference in
436      compilation speed between maxIter=10 and maxIter=40. Actually,
437      my measurements showed that maxIter=40 was a tad faster than
438      maxIter=10! Also 96% of the  files in the compiler reach a fix
439      point within 13 iterations, so fixing maxIter at 40, while high,
440      is okay.
441    
442    ----------------------------------------------------------------------
443    Name: Matthias Blume
444    Date: 2001/10/31 15:25:00 EST
445    Tag: blume-20011031-pgraph
446    Description:
447    
448    CKIT:
449    * Changed the "Function" constructor of type Ast.ctype to carry optional
450      argument identifiers.
451    * Changed the return type of TypeUtil.getFunction accordingly.
452    * Type equality ignores the argument names.
453    * TypeUtil.composite tries to preserve argument names but gives up quickly
454      if there is a mismatch.
455    
456    installation script:
457    * attempts to use "curl" if available (unless "wget" is available as well)
458    
459    CM:
460    * has an experimental implementation of "portable graphs" which I will
461      soon propose as an implementation-independent library format
462    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
463    
464    NLFFI-LIB:
465    * some cleanup (all cosmetic)
466    
467    NLFFIGEN:
468    * temporarily disabled the mechanism that suppresses ML output for
469      C definitions whose identifiers start with an underscore character
470    * generate val bindings for enum constants
471    * user can request that only one style (light or heavy) is being used;
472      default is to use both (command-line arguments: -heavy and -light)
473    * fixed bug in handling of function types involving incomplete pointers
474    * generate ML entry points that take record arguments (i.e., using
475      named arguments) for C functions that have a prototype with named
476      arguments
477      (see changes to CKIT)
478    
479    ----------------------------------------------------------------------
480    Name: Allen Leung
481    Date: 2001/10/27 20:34:00 EDT
482    Tag: leunga-20011027-x86-fast-fp-call
483    Description:
484    
485       Fixed the bug described in blume-20010920-slowfp.
486    
487       The fix involves
488          1. generating FCOPYs in FSTP in ia32-svid
489          2. marking a CALL with the appropriate annotation
490    
491    ----------------------------------------------------------------------
492    Name: Matthias Blume
493    Date: 2001/10/16 11:32:00 EDT
494    Tag: blume-20011016-netbsd
495    Description:
496    
497    Underscore patch from Chris Richards (fixing problem with compiling
498    runtime system under recent NetBSD).
499    
500    ----------------------------------------------------------------------
501    Name: Allen Leung
502    Date: 2001/10/12 17:18:32 EDT 2001
503    Tag: leung-20011012-x86-printflowgraph
504    Description:
505    
506    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
507    
508    ----------------------------------------------------------------------
509    Name: Lal George
510    Date: 2001/10/11 23:51:34 EDT
511    Tag: george-20011011-too-many-instrs
512    Description:
513    
514    The representation of a program point never expected to see more
515    than 65536 instructions in a basic block!
516    
517    ----------------------------------------------------------------------
518    Name: Lal George
519    Date: 2001/10/09 09:41:37 EDT
520    Tag: george-20011008-mlrisc-labels
521    Description:
522    
523    Changed the machine description files to support printing of
524    local and global labels in assembly code, based on host assembler
525    conventions.
526    
527    ----------------------------------------------------------------------
528    Name: Matthias Blume
529    Date: 2001/09/25 15:25:00 EDT
530    Tag: blume-20010925-exninfo
531    Description:
532    
533    I provided a non-hook implementation of exnName (at the toplevel) and
534    made the "dummy" implementation of exnMessage (at the toplevel) more
535    useful: if nothing gets "hooked in", then at least you are going to
536    see the exception name and a message indicating why you don't see more.
537    
538    [For the time being, programs that need exnMessage and want to use
539    ml-build should either use General.exnMessage (strongly recommended) or
540    refer to structure General at some other point so that CM sees a
541    static dependency.]
542    
543    [Similar remarks go for "print" and "use":  If you want to use their
544    functionality in stand-alone programs generated by ml-build, then use
545    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
546    
547    ----------------------------------------------------------------------
548    Name: Matthias Blume
549    Date: 2001/09/20 17:28:00 EDT
550    Tag: blume-20010920-slowfp
551    Description:
552    
553    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
554    
555    ----------------------------------------------------------------------
556    Name: Matthias Blume
557    Date: 2001/09/20 17:20:00 EDT
558    Tag: blume-20010920-canonicalpaths
559    Description:
560    
561    0. Updated the BOOT file (something that I forgot to do earlier).
562    
563    1. Small internal change to CM so that it avoids "/../" in filenames
564       as much as possible (but only where it is safe).
565    
566    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
567       that arguments that contain delimiters are passed through correctly.
568       This change also means that all "special" arguments of the form
569       @SMLxxx... must come first.
570    
571    3. Changed install script to put relative anchor names for tool commands
572       into pathconfig.
573    
574    ----------------------------------------------------------------------
575    Name: Matthias Blume
576    >>>>>>> 1.169
577    Date: 2001/09/18 15:35:00 EDT
578    Tag: blume-20010918-readme11036
579    Description:
580    
581    Added README files.
582    
583    ----------------------------------------------------------------------
584    Name: Matthias Blume
585    Date: 2001/09/18 11:45:00 EDT
586    Tag: Release_110_36 (retag)
587    Description:
588    
589    Fixed mistake in config/preloads. Retagged as 110.36.
590    
591    ----------------------------------------------------------------------
592    Name: Matthias Blume
593    Date: 2001/09/18 09:40:00 EDT
594    Tag: Release_110_36_orig (tag changed)
595    Description:
596    
597    New version (110.36).  New bootfiles.
598    
599    ----------------------------------------------------------------------
600    Name: Matthias Blume
601    Date: 2001/09/14 16:15:00 EDT
602    Tag: blume-20010914-x86fastfp
603    Description:
604    
605    John committed some changes that Allen made, in particular a (hopefully)
606    correctly working version of the x86-fp module.
607    
608    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
609    flag to "true".  Everything seems to compile to a fixpoint ok, and
610    "mandelbrot" speeds up by about 15%.
611    
612    ----------------------------------------------------------------------
613    Name: Matthias Blume
614    Date: 2001/09/13 11:20:00 EDT
615    Tag: blume-20010913-minimal
616    Description:
617    
618    1. Stefan Monnier's patch to fix a miscompilation problem that
619       was brought to light by John Reppy's work on Moby.
620    
621    2. Implemented a minimal "structure Compiler" that contains just
622       "version" and "architecture".  The minimal version will be
623       available when the full version is not.  This is for backward-
624       compatibility with code that wants to test Compiler.version.
625    
626    ----------------------------------------------------------------------
627    Name: Matthias Blume
628    Date: 2001/08/28 14:03:00 EDT
629    Tag: blume-20010828-ml-lex
630    Description:
631    
632    Fix for bug 1581, received from Neophytos Michael.
633    
634    ----------------------------------------------------------------------
635    Name: Matthias Blume
636    Date: 2001/08/27 11:20:00 EDT
637    Tag: blume-20010827-readme11035
638    Description:
639    
640    Fleshed out the README file for 110.35.
641    
642    ----------------------------------------------------------------------
643    Name: Matthias Blume
644    Date: 2001/08/24 17:10:00 EDT
645    Tag: Release_110_35
646    Description:
647    
648    New version number (110.35).  New bootfiles.
649    
650    ----------------------------------------------------------------------
651    Name: Lal George
652    Date: 2001/08/24 13:47:18 EDT 2001
653    Tag: george-20010824-MLRISC-graphs
654    Description:
655    
656     removed clusters from MLRISC completely and replaced with graphs.
657    
658    ----------------------------------------------------------------------
659    Name: Matthias Blume
660    Date: 2001/08/23 17:50:00 EDT
661    Tag: blume-20010823-toplevel
662    Description:
663    
664    - some reorganization of the code that implements various kinds of
665      environments in the compiler (static, dynamic, symbolic, combined)
666    - re-implemented the EnvRef module so that evalStream works properly
667      (if the stream contains references to "use", "CM.make", etc.)
668    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
669    
670    ----------------------------------------------------------------------
671    Name: Matthias Blume
672    Date: 2001/08/20 15:50 EDT
673    Tag: blume20010820-slipup
674    Description:
675    
676    I forgot to commit a few files.  Here they are...
677    
678    ----------------------------------------------------------------------
679    Name: Matthias Blume
680    Date: 2001/08/20 15:35:00 EDT
681    Tag: blume-20010820-debugprof
682    Description:
683    
684    !!!! NEW BOOTFILES !!!!
685    
686    This is another round of reorganizing the compiler sources.  This
687    time the main goal was to factor out all the "instrumentation"
688    passes (for profiling and backtracing) into their own library.
689    The difficulty was to do it in such a way that it does not depend
690    on elaborate.cm but only on elabdata.cm.
691    
692    Therefore there have been further changes to both elaborate.cm and
693    elabdata.cm -- more "generic" things have been moved from the former
694    to the latter.  As a result, I was forced to split the assignment
695    of numbers indicating "primtyc"s into two portions: SML-generic and
696    SML/NJ-specific.  Since it would have been awkward to maintain,
697    I bit the bullet and actually _changed_ the mapping between these
698    numbers and primtycs.  The bottom line of this is that you need
699    a new set of bin- and bootfiles.
700    
701    I have built new bootfiles for all architectures, so doing a fresh
702    checkout and config/install.sh should be all you need.
703    
704    The newly created library's name is
705    
706        $smlnj/viscomp/debugprof.cm
707    
708    and its sources live under
709    
710        src/compiler/DebugProf
711    
712    ----------------------------------------------------------------------
713    Name: Matthias Blume
714    Date: 2001/08/15 17:15:00 EDT
715    Tag: blume-20010815-compreorg
716    Description:
717    
718    This is a first cut at reorganizing the CM libraries that make up the
719    core of the compiler.  The idea is to separate out pieces that could
720    be used independently by tools, e.g., the parser, the typechecker, etc.
721    
722    The current status is a step in this direction, but it is not quite
723    satisfactory yet.  Expect more changes in the future.
724    
725    Here is the current (new) organization...
726    
727        What used to be $smlnj/viscomp/core.cm is now divided into
728        six CM libraries:
729    
730             $smlnj/viscomp/basics.cm
731                           /parser.cm
732                           /elabdata.cm
733                           /elaborate.cm
734                           /execute.cm
735                           /core.cm
736    
737        The CM files for these libraries live under src/system/smlnj/viscomp.
738        All these libraries are proxy libraries that contain precisely
739        one CM library component.  Here are the locations of the components
740        (all within the src/compiler tree):
741    
742             Basics/basics.cm
743             Parse/parser.cm
744             ElabData/elabdata.cm
745             Elaborator/elaborate.cm
746             Execution/execute.cm
747             core.cm
748    
749         [This organization is the same that has been used already
750         for a while for the architecture-specific parts of the visible
751         compiler and for the old version of core.cm.]
752    
753         As you will notice, many source files have been moved from their
754         respective original locations to a new home in one of the above
755         subtrees.
756    
757         The division of labor between the new libraries is the following:
758    
759             basics.cm:
760                - Simple, basic definitions that pertain to many (or all) of
761                  the other libraries.
762             parser.cm:
763                - The SML parser, producing output of type Ast.dec.
764                - The type family for Ast is also defined and exported here.
765             elabdata.cm:
766                - The datatypes that describe input and output of the elaborator.
767                  This includes types, absyn, and static environments.
768             elaborator.cm:
769                - The SML/NJ type checker and elaborator.
770                  This maps an Ast.dec (with a given static environment) to
771                  an Absyn.dec (with a new static environment).
772                - This libraries implements certain modules that used to be
773                  structures as functors (to remove dependencies on FLINT).
774             execute.cm:
775                - Everything having to do with executing binary code objects.
776                - Dynamic environments.
777             core.cm:
778                - SML/NJ-specific instantiations of the elaborator and MLRISC.
779                - Top-level modules.
780                - FLINT (this should eventually become its own library)
781    
782    Notes:
783    
784    I am not 100% happy with the way I separated the elaborator (and its
785    data structures) from FLINT.  Two instances of the same problem:
786    
787        1. Data structures contain certain fields that carry FLINT-specific
788           information.  I hacked around this using exn and the property list
789           module from smlnj-lib.  But the fact that there are middle-end
790           specific fields around at all is a bit annoying.
791    
792        2. The elaborator calculates certain FLINT-related information.  I tried
793           to make this as abstract as I could using functorization, but, again,
794           the fact that the elaborator has to perform calculations on behalf
795           of the middle-end at all is not nice.
796    
797        3. Having to used exn and property lists is unfortunate because it
798           weakens type checking.  The other alternative (parameterizing
799           nearly *everything*) is not appealing, though.
800    
801    I removed the "rebinding =" warning hack because due to the new organization
802    it was awkward to maintain it.  As a result, the compiler now issues some of
803    these warnings when compiling init.cmi during bootstrap compilation. On
804    the plus side, you also get a warning when you do, for example:
805       val op = = Int32.+
806    which was not the case up to now.
807    
808    I placed "assign" and "deref" into the _Core structure so that the
809    code that deals with the "lazy" keyword can find them there.  This
810    removes the need for having access to the primitive environment
811    during elaboration.
812    
813    ----------------------------------------------------------------------
814    Name: Matthias Blume
815    Date: 2001/08/13
816    Tag: blume-20010813-closures
817    Description:
818    
819    This fix was sent to us by Zhong Shao.  It is supposed to improve the
820    performance of certain loops by avoiding needless closure allocation.
821    
822    ----------------------------------------------------------------------
823    Name: Lal George
824    Date: 2001/07/31 10:03:23 EDT 2001
825    Tag: george-20010731-x86-fmalloc
826    Description: Fixed bug in x86 calls
827    
828        There was a bug where call instructions would mysteriously
829        vanish. The call instruction had to be one that returned
830        a floating point value.
831    
832    ----------------------------------------------------------------------
833    Name: Lal George
834    Date: 2001/07/19 16:36:29 EDT 2001
835    Tag: george-20010719-simple-cells
836    Description:
837    
838    I have dramatically simplified the interface for CELLS in MLRISC.
839    
840    In summary, the cells interface is broken up into three parts:
841    
842      1. CellsBasis : CELLS_BASIS
843    
844            CellsBasis is a top level structure and common for all
845            architectures.  it contains the definitions of basic datatypes
846            and utility  functions over these types.
847    
848      2. functor Cells() : CELLS
849    
850            Cells generates an interface for CELLS that incorporates the
851            specific resources on the target architecture, such as the
852            presence of special register classes, their number and size,
853            and various useful substructures.
854    
855      3. <ARCH>CELLS
856    
857            e.g. SparcCells: SPARCCELLS
858    
859            <ARCH>CELLS usually contains additional bindings for special
860            registers  on the architecture, such as:
861    
862                    val r0 : cell           (* register zero *)
863                    val y : cell            (* Y register *)
864                    val psr : cell          (* processor status register *)
865                    ...
866    
867            The structure returned by applying the Cells functor is opened
868            in this interface.
869    
870    The main implication of all this is that the datatypes for cells is
871    split between CellsBasis and CELLS -- a fairly simple change for user
872    code.
873    
874    In the old scheme the CELLS interface had a definitional binding of
875    the form:
876    
877            signature CELLS = sig
878    
879               structure CellsBasis = CellsBasis
880    
881               ...
882    
883            end
884    
885    With all the sharing constraints that goes on in MLRISC, this old
886    design  quickly leads to errors such as:
887    
888            "structure definition spec inside of sharing ... "
889    
890    
891    and appears to require an unacceptable amount of sharing and where
892    constraint hackery.
893    
894    I think this error message (the interaction of definitional specs and
895    sharing) requires more explanation on our web page.
896    
897    ----------------------------------------------------------------------
898    Name: Matthias Blume
899    Date: 2001/07/19 15:00:00 EDT
900    Tag: blume-20010719-libreorg
901    Description:
902    
903    This update puts together a fairly extensive but straightforward change
904    to the way the libraries that implement the interactive system are
905    organized:
906    
907       The biggest change is the elimination of structure Compiler.  As a
908       replacement for this structure, there is now a CM library
909       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
910       that exports all the substructures of the original structure Compiler
911       directly.  So instead of saying Compiler.Foo.bar one now simply
912       says Foo.bar.  (The CM libraries actually export a collection of
913       structures that is richer than the collection of substructures of
914       structure Compiler.)
915    
916       To make the transition smooth, there is a separate library called
917       $smlnj/compiler/compiler.cm which puts together and exports the
918       original structure Compiler (or at least something very close to it).
919    
920       There are five members of the original structure Compiler
921       that are not exported directly but which instead became members
922       of a new structure Backend (described by signature BACKEND).  These are:
923       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
924       Interact (: INTERACT), structure Machine (: MACHINE), and val
925       architecture (: string).
926    
927       Structure Compiler.Version has become structure CompilerVersion.
928    
929       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
930       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
931       or x86, respectively.
932       Each of these exports the same frontend structures that
933       $smlnj/compiler.cm exports.  But they do not have a structure Backend
934       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
935       Hppa, PPC, Sparc, or X86, respectively.
936    
937       Library $smlnj/compiler/all.cm exports the union of the exports of
938       $smlnj/compiler/<arch>.cm
939    
940       There are no structures <Arch>Compiler anymore, use
941       $smlnj/compiler/<arch>.cm instead.
942    
943       Library host-compiler-0.cm is gone.  Instead, the internal library
944       that instantiates CM is now called cm0.cm.  Selection of the host
945       compiler (backend) is no longer done here but. (Responsibility for it
946       now lies with $smlnj/compiler/current.cm.  This seems to be more
947       logical.)
948    
949       Many individual files have been moved or renamed.  Some files have
950       been split into multiple files, and some "dead" files have been deleted.
951    
952    Aside from these changes to library organization, there are also changes
953    to the way the code itself is organized:
954    
955       Structure Binfile has been re-implemented in such a way that it no
956       longer needs any knowledge of the compiler.  It exclusively deals
957       with the details of binfile layout.  It no longer invokes the
958       compiler (for the purpose of creating new prospective binfile
959       content), and it no longer has any knowledge of how to interpret
960       pickles.
961    
962       Structure Compile (: COMPILE) has been stripped down to the bare
963       essentials of compilation.  It no longer deals with linking/execution.
964       The interface has been cleaned up considerably.
965    
966       Utility routines for dealing with linking and execution have been
967       moved into their own substructures.
968    
969       (The ultimate goal of these changes is to provide a light-weight
970       binfile loader/linker (at least for, e.g., stable libraries) that
971       does not require CM or the compiler to be present.)
972    
973    CM documentation has been updated to reflect the changes to library
974    organization.
975    
976    ----------------------------------------------------------------------
977    Name: Matthias Blume
978    Date: 2001/07/10 17:30:00 EDT
979    Tag: Release_110_34
980    Description:
981    
982    Minor tweak to 110.34 (re-tagged):
983    
984      - README.html file added to CVS repository
985      - runtime compiles properly under FreeBSD 3.X and 4.X
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/07/10 17:30:00 EDT
990    Tag: Release_110_34
991    Description:
992    
993    New version number (110.34). New bootfiles.
994    
995    ----------------------------------------------------------------------
996    Name: Matthias Blume
997    Date: 2001/07/09 16:00:00 EDT
998    Tag: blume-20010709-more-varargs
999    Description:
1000    
1001    I changed the handling of varargs in ml-nlffigen again:
1002    The ellipsis ... will now simply be ignored (with an accompanying warning).
1003    
1004    The immediate effect is that you can actually call a varargs function
1005    from ML -- but you can't actually supply any arguments beyond the ones
1006    specified explicitly.  (For example, you can call printf with its format
1007    string, but you cannot pass additional arguments.)
1008    
1009    This behavior is only marginally more useful than the one before, but
1010    it has the advantage that a function or, more importantly, a function
1011    type never gets dropped on the floor, thus avoiding follow-up problems with
1012    other types that refer to the offending one.
1013    
1014    ----------------------------------------------------------------------
1015    Name: Matthias Blume
1016    Date: 2001/07/09 11:25:00 EDT
1017    Tag: blume-20010709-varargs
1018    Description:
1019    
1020    1. ckit-lib.cm now exports structure Error
1021    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1022       with a warning accompanied by a source location.  Moreover, it
1023       merely skips the offending function or type and proceeds with the
1024       rest of its work.u  As a result, one can safely feed C code containing
1025       "..." to ml-nlffigen.
1026    3. There are some internal improvements to CM, providing slightly
1027       more general string substitutions in the tools subsystem.
1028    
1029    ----------------------------------------------------------------------
1030    Name: Matthias Blume
1031    Date: 2001/06/27 15:10:00 EDT
1032    Tag: blume-20010627-concur
1033    Description:
1034    
1035    Fixed a small bug in CM's handling of parallel compilation.
1036    (You could observe the bug by Control-C-interrupting an ordinary
1037    CMB.make or CM.stabilize and then attaching some compile servers.
1038    The result was that all of a sudden the previously interrupted
1039    compilation would continue on its own.  This was because of
1040    an over-optimization: CM did not bother to clean out certain queues
1041    when no servers were attached "anyway", resulting in the contents
1042    of these queues to grab control when new servers did get attached.)
1043    
1044    There is also another minor update to the CM manual.
1045    
1046    ----------------------------------------------------------------------
1047    Name: Matthias Blume
1048    Date: 2001/06/26 16:15:00 EDT
1049    Tag: blume-20010626-cmdoc
1050    Description:
1051    
1052    Minor typo fixed in CM manual (syntax diagram for libraries).
1053    
1054    ----------------------------------------------------------------------
1055    Name: Matthias Blume
1056    Date: 2001/06/25 22:55:00 EDT
1057    Tag: blume-20010625-x86pc
1058    Description:
1059    
1060    Fixed a nasty bug in the X86 assembly code that caused signal
1061    handlers to fail (crash) randomly.
1062    
1063    ----------------------------------------------------------------------
1064    Name: Matthias Blume
1065    Date: 2001/06/25 12:05:00 EDT
1066    Tag: blume-20010625-nlffigen
1067    Description:
1068    
1069    This update fixes a number of minor bugs in ml-nlffigen as reported by
1070    Nick Carter <nbc@andrew.cmu.edu>.
1071    
1072      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1073      2. Default names for generated files are now derived from the name of
1074         the C file *without its directory*.  In particular, this causes generated
1075         files to be placed locally even if the C file is in some system directory.
1076      3. Default names for generated signatures and structures are also derived
1077         from the C file name without its directory.  This avoids silly things
1078         like "structure GL/GL".
1079         (Other silly names are still possible because ml-nlffigen does not do
1080          a thorough check of whether generated names are legal ML identifiers.
1081          When in doubt, use command line arguments to force particular names.)
1082    
1083    ----------------------------------------------------------------------
1084    Name: Matthias Blume
1085    Date: 2001/06/21 12:25:00 EDT
1086    Tag: blume-20010621-eXene
1087    Description:
1088    
1089    eXene now compiles and (sort of) works again.
1090    
1091    The library name (for version > 110.33) is $/eXene.cm.
1092    
1093    I also added an new example in src/eXene/examples/nbody.  See the
1094    README file there for details.
1095    
1096    ----------------------------------------------------------------------
1097    Name: Matthias Blume
1098    Date: 2001/06/20 16:40:00 EDT
1099    Tag: blume-20010620-cml
1100    Description:
1101    
1102    CML now compiles and works again.
1103    
1104    Libraries (for version > 110.33):
1105    
1106      $cml/cml.cm            Main CML library.
1107      $cml/basis.cm          CML's version of $/basis.cm.
1108      $cml/cml-internal.cm   Internal helper library.
1109      $cml/core-cml.cm       Internal helper library.
1110      $cml-lib/trace-cml.cm  Tracing facility.
1111      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1112    
1113    The installer (config/install.sh) has been taught how to properly
1114    install this stuff.
1115    
1116    ----------------------------------------------------------------------
1117    Name: Matthias Blume
1118    Date: 2001/06/19 17:55:00 EDT
1119    Tag: blume-20010619-instantiate
1120    Description:
1121    
1122    This un-breaks the fix for bug 1432.
1123    (The bug was originally fixed in 110.9 but I broke it again some
1124    time after that.)
1125    
1126    ----------------------------------------------------------------------
1127    Name: Matthias Blume
1128    Date: 2001/06/19 17:25:00 EDT
1129    Tag: blume-20010619-signals
1130    Description:
1131    
1132    This should (hopefully) fix the long-standing signal handling bug.
1133    (The runtime system was constructing a continuation record with an
1134    incorrect descriptor which would cause the GC to drop data on the floor...)
1135    
1136    ----------------------------------------------------------------------
1137    Name: Matthias Blume
1138    Date: 2001/06/15 15:05:00 EDT
1139    Tag: blume-20010615-moresparc
1140    Description:
1141    
1142    Here is a short late-hour update related to Sparc c-calls:
1143    
1144     -- made handling of double-word arguments a bit smarter
1145    
1146     -- instruction selection phase tries to collapse certain clumsily
1147        constructed ML-Trees; typical example:
1148    
1149            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1150    
1151        This currently has no further impact on SML/NJ since mlriscGen does
1152        not seem to generate such patterns in the first place, and c-calls
1153        (which did generate them in the beginning) has meanwhile been fixed
1154        so as to avoid them as well.
1155    
1156    ----------------------------------------------------------------------
1157    Name: Matthias Blume
1158    Date: 2001/06/15 15:05:00 EDT
1159    Tag: blume-20010615-sparc
1160    Description:
1161    
1162    The purpose of this update is to provide an implementation of NLFFI
1163    on Sparc machines.
1164    
1165    Here are the changes in detail:
1166    
1167       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1168       the Sparc implementation of the c-calls API.
1169       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1170       for accessing the ML frame.  Thus, we have a real frame pointer and
1171       can freely modify %sp without need for an omit-frame-ptr phase.
1172       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1173       this case.
1174       * ml-nlffigen has been taught to produce code for different architectures
1175       and calling conventions.
1176       * In a way similar to what was done in the x86 case, the Sparc
1177       backend uses its own specific extension to mltree.  (For example,
1178       it needs to be able to generate UNIMP instructions which are part
1179       of the calling convention.)
1180       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1181       to make it easier to plug in new machine- and os-dependent parts).
1182    
1183    There are some other fairly unrelated bug fixes and cleanups as well:
1184    
1185       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1186       that they properly share their libraries with existing SML/NJ libraries.
1187       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1188       follow-up error messages.
1189       * Updates to CM/CMB documentation.
1190    
1191    TODO items:
1192    
1193       * MLRISC should use a different register as its asmTemp on the Sparc.
1194         (The current %o2 is a really bad choice because it is part of the
1195         calling conventions, so things might interfere in unexpected ways.)
1196    
1197    ----------------------------------------------------------------------
1198    Name: Matthias Blume
1199    Date: 2001/06/07
1200    Tag: blume-20010607-calls
1201    Description:
1202    
1203    A number of internal changes related to C calls and calling conventions:
1204    
1205    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1206       number of bytes popped implicitly (by the callee).  In most cases
1207       this field is 0 but on x86/win32 it is some non-zero value.  This
1208       is information provided for the benefit of the "omit-frameptr" pass.
1209    2. The CALL instruction on the x86 carries a similar "pops" field.
1210       The instruction selection phase copies its value from the ML-Tree
1211       CALL statement.
1212    3. On all other architectures, the instruction selection phase checks
1213       whether "pops=0" and complains if not.
1214    4. The c-calls implementation for x86 now accepts two calling conventions:
1215       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1216       up after the call and pops is set to 0.  For "stdcall", the caller
1217       does nothing, leaving the cleanup to the callee; pops is set to
1218       the number of bytes that were pushed onto the stack.
1219    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1220       distinguish between "ccall" and "stdcall".
1221    6. The UNIMP instruction has been added to the supported Sparc instruction
1222       set. (This is needed for implementing the official C calling convention
1223       on this architecture.)
1224    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1225       work with the latest CM.
1226    
1227    ----------------------------------------------------------------------
1228    Name: Matthias Blume
1229    Date: 2001/06/05 15:10:00 EDT
1230    Tag: blume-20010605-cm-index
1231    Description:
1232    
1233    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1234    
1235    1. CM can now generate "index files".  These are human-readable files
1236       that list on a per-.cm-file basis each toplevel symbol defined or
1237       imported.  The location of the index file for
1238       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1239       To enable index-file generation, set CM.Control.generate_index to true
1240       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1241    
1242       The CM manual has been updated accordingly.
1243    
1244    2. I made some slight modifications to the c-calls API in MLRISC.
1245    
1246         a) There is now a callback to support saving/restoring of
1247            dedicated but caller-save registers around the actual call
1248            instruction.
1249         b) One can optionally specify a comment-annotation for the
1250            call instruction.
1251    
1252    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1253       (For example, the comment annotation shows the C prototype of
1254        the function being called.)
1255    
1256    ----------------------------------------------------------------------
1257    Name: Matthias Blume
1258    Date: 2001/06/01 13:30:00 EDT
1259    Tag: blume-20010601-nlffi-cleanup
1260    Description:
1261    
1262    This is mostly a cleanup of MLFFI stuff:
1263    
1264       - some signature files have been put into a more exposed place
1265       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1266       - ml-nlffigen changed accordingly
1267       - tutorial updated
1268    
1269    Other changes:
1270    
1271       - author's affiliation in CM manual(s) updated
1272       - some more recognized keywords added to Allen's sml.sty
1273    
1274    ----------------------------------------------------------------------
1275    Name: Matthias Blume
1276    Date: 2001/05/25 15:30:00 EDT
1277    Tag: blume-20010525-iptr
1278    Description:
1279    
1280      - put the official 110.33-README (as it appears on the ftp server) under
1281        CVS
1282      - fixed a small bug related to incomplete pointer types in
1283        ml-nlffigen
1284      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1285        (it does not need the 'f type parameter)
1286    
1287    ----------------------------------------------------------------------
1288    Name: Matthias Blume
1289    Date: 2001/05/23 14:30:00 EDT
1290    Tag: Release_110_33
1291    Description:
1292    
1293    New version number (110.33).  New bootfiles.
1294    
1295    ----------------------------------------------------------------------
1296    Name: Matthias Blume
1297    Date: 2001/05/22 18:06:00 EDT
1298    Tag: blume-20010522-targets
1299    Description:
1300    
1301    Made install.sh use file config/targets.customized if it exists, falling
1302    back to config/targets if it doesn't.  This way one can have a customized
1303    version of the targets file without touching the "real thing", thus
1304    eliminating the constant fear of accidentally checking something bogus
1305    back into the CVS repository...  (File config/targets.customized must
1306    not be added to the repository!)
1307    
1308    ----------------------------------------------------------------------
1309    Name: Matthias Blume
1310    Date: 2001/05/22 16:30:00 EDT
1311    Tag: blume-20010522-minitut
1312    Description:
1313    
1314    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1315       struct returns.
1316    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1317       incomplete, preliminary documentation for NLFFI.
1318    
1319    ----------------------------------------------------------------------
1320    Name: Matthias Blume
1321    Date: 2001/05/14 11:30:00 EDT
1322    Tag: blume-20010514-script
1323    Description:
1324    
1325    Some bugs in install script fixed.
1326    
1327    In addition to that I also made a slight change to the NLFFI API:
1328    Functors generated by ml-nlffigen now take the dynamic library as a
1329    straight functor argument, not as a suspended one.  (The original
1330    functor code used to force the suspension right away anyway, so there
1331    was nothing gained by this complication of the interface.)
1332    
1333    ----------------------------------------------------------------------
1334    Name: Matthias Blume
1335    Date: 2001/05/11 14:35:00 EDT
1336    Tag: blume-20010511-ml-nlffi
1337    Description:
1338    
1339    I finally took the plunge and added my new FFI code to the main
1340    repository.  For x86-linux it is now ready for prime-time.
1341    
1342    There are two new subdirectories of "src":
1343    
1344      - ml-nlffi-lib:
1345           The utility library for programs using the FFI interface.
1346           Here is the implementation of $/c.cm and its associated low-level
1347           partners $/c-int.cm and $/memory.cm.
1348      - ml-nlffigen:
1349           A stand-alone program for generating ML glue code from C source
1350           code.
1351    
1352    Building ml-nlffigen requires $/ckit-lib.cm.
1353    
1354    The config/install.sh script has been updates to do the Right Thing
1355    (hopefully).
1356    
1357    Notice that the source tree for the C-Kit will not be put under "src"
1358    but directly under the installation root directory.  (This is the
1359    structure that currently exists on the CVS server when you check out
1360    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1361    
1362    Bugs: No documentation yet.
1363    
1364    ----------------------------------------------------------------------
1365    Name: Matthias Blume
1366    Date: 2001/05/09 16:35:00 EDT
1367    Tag: blume-20010509-cpscontract
1368    Description:
1369    
1370    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1371    wrapper/unwrapper elimination did not decrement usage counts and some
1372    dead variables got overlooked by the dead-up logic.)
1373    
1374    ----------------------------------------------------------------------
1375    Name: Lal George
1376    Date: 2001/05/08  17:26:09 EDT
1377    Tag: george-20010508-omit-frameptr
1378    Description:
1379    
1380    Changes to implement the omit-frame-pointer optimization to support
1381    raw C calls. For now, there is only support on the Intel x86, but
1382    other architectures will follow as more experience is gained with this.
1383    
1384    
1385    ----------------------------------------------------------------------
1386    Name: Matthias Blume
1387    Date: 2001/05/07 14:40:00 EDT
1388    Tag: blume-20010507-proxies
1389    Description:
1390    
1391    I made into "proxy libraries" all libraries that qualify for such a
1392    change.  (A qualifying library is a library that has another library or
1393    groups as its sole member and repeats that member's export list
1394    verbatim.  A proxy library avoids this repetition by omitting its export
1395    list, effectively inheriting the list that its (only) member exports.
1396    See the CM manual for more explanation.)
1397    The main effect is that explicit export lists for these libraries
1398    do not have to be kepts in sync, making maintenance a bit easier.
1399    
1400    I also added copyright notices to many .cm-files.
1401    
1402    Last but not least, I made a new set of bootfiles.
1403    
1404    ----------------------------------------------------------------------
1405    Name: Matthias Blume
1406    Date: 2001/05/04 17:00:00 EDT
1407    Tag: blume-20010504-cm-lsplit
1408    Description:
1409    
1410    0. John merged pending changes to $/smlnj-lib.cm
1411    
1412    1. Allen's previous change accidentally backed out of one of Lal's
1413       earlier changes.  I undid this mistake (re-introducing Lal's change).
1414    
1415    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1416       within the compiler where applicable.  There is some code simplification
1417       because of that.
1418    
1419    3. The "split" phase (in FLINT) is now part of the default list of phases.
1420       Compiler.Control.LambdaSplitting.* can be used to globally control the
1421       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1422       it can now also be controlled on a per-source basis: CM has been taught
1423       a new tool parameter applicable to ML source files.
1424    
1425       - To turn lambda-splitting off completely:
1426            local open Compiler.Control.LambdaSplitting in
1427                val _ = set Off
1428            end
1429       - To make "no lambda-splitting" the global default (but allow per-source
1430         overriding); this is the initial setting:
1431            local open Compiler.Control.LambdaSplitting in
1432                val _ = set (Default NONE)
1433            end
1434       - To make "lambda-splitting with aggressiveness a" the global default
1435         (and allow per-source overriding):
1436            local open Compiler.Control.LambdaSplitting in
1437                val _ = set (Default (SOME a))
1438            end
1439    
1440       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1441         write (in the respective .cm-file):
1442            a.sml (lambdasplitting:off)
1443       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1444            a.sml (lambdasplitting:on)
1445       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1446         <a> is a decimal non-negative integer):
1447            a.sml (lambdasplitting:<a>)
1448       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1449            a.sml (lambdasplitting:infinity)
1450       - To use the global default for a.sml:
1451            a.sml (lambdasplitting:default)
1452         or simply
1453            a.sml
1454    
1455    ----------------------------------------------------------------------
1456    Name: Allen Leung
1457    Date: 2001/05/04 01:57:00 EDT
1458    Tag: leunga-20010504-sync
1459    Description:
1460    
1461      MLRISC features.
1462    
1463      1. Fix to CMPXCHG instructions.
1464      2. Changed RA interface to allow annotations in callbacks.
1465      3. Added a new method to the stream interface to allow annotations updates.
1466    
1467    ----------------------------------------------------------------------
1468    Name: Matthias Blume
1469    Date: 2001/05/01 11:45:00 EDT
1470    Tag: blume-20010501-pcedittmp
1471    Description:
1472    
1473    Changed install.sh to use the current working directory instead of
1474    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1475    of /usr/tmp caused trouble with MacOS X because of file premission
1476    problems.
1477    
1478    ----------------------------------------------------------------------
1479    Name: Matthias Blume
1480    Date: 2001/04/20 11:10:00 EDT
1481    Tag: blume-20010420-inMLflag
1482    Description:
1483    
1484     - added vp_limitPtrMask to vproc-state.h
1485       (for use by the raw-C-calls mechanism to implement proper interrupt
1486        handling)
1487     - made the ML compiler aware of various data-structure offsets so it
1488       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1489     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1490       raw C-calls
1491    
1492    ----------------------------------------------------------------------
1493    Name: Lal George
1494    Date: 2001/04/20 09:15:28 EDT
1495    Tag: george-20010420-macosX
1496    Description:
1497    
1498     - Changes to port to Mac OS X; Darwin.
1499    
1500     - In the process I found that sqrt was broken on the PPC, because the
1501       fsqrt instruction is not implemented.
1502    
1503    ----------------------------------------------------------------------
1504    Name: Matthias Blume
1505    Date: 2001/04/18 12:45:00 EDT
1506    Tag: blume-20010418-ccalls
1507    Description:
1508    
1509     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1510       (this bug prevented structure arguments containing pointers from being
1511        passed correctly)
1512     - changed the raw-C-call code in mlriscGen.sml in such a way that
1513       structure arguments are represented as a pointer to the beginning
1514       of the structure (instead of having a series of synthesized arguments,
1515       one for each structure member)
1516    
1517     - made makeml script's verbosity level configurable via environment
1518       variable (MAKEML_VERBOSITY)
1519    
1520     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1521       in rawmem-x86.sml; we are now using the real thing
1522    
1523    ----------------------------------------------------------------------
1524    Name: Matthias Blume
1525    Date: 2001/03/22 16:25:00 EST
1526    Tag: blume-20010322-bootfiles
1527    Description:
1528    
1529    Created a new set of bootfiles (for your automatic installation convenience).
1530    
1531    ----------------------------------------------------------------------
1532    Name: Matthias Blume
1533    Date: 2001/03/22 15:10:00 EST
1534    Tag: blume-20010322-rawmem-parcm
1535    Description:
1536    
1537    1. All "raw memory access" primitives for the new FFI are implemented now
1538       (at least on the x86).
1539    2. Some further cleanup of CM's parallel make mechanism.
1540    
1541    ----------------------------------------------------------------------
1542    Name: Matthias Blume
1543    Date: 2001/03/19 17:53:00 EST
1544    Tag: blume-20010319-parallel
1545    Description:
1546    
1547    Parallel make (using compile servers) now works again.
1548    
1549    To this end, CM.stabilize and CMB.make have been modified to work in
1550    two passes when compile servers are attached:
1551       1. Compile everything, do not perform stabilization; this pass
1552          uses compile servers
1553       2. Stabilize everything; this pass does not use compile servers
1554    If there are no compile servers, the two passes are combined into one
1555    (as before).  Splitting the passes increases the inherent parallelism
1556    in the dependency graph because the entire graph including all
1557    libraries is available at the same time.  This, in turn, improves
1558    server utilization.  The downside is that the master process will
1559    have to do some extra work after compilation is done (because for
1560    technical reasons it must re-read all the binfiles during stabilization).
1561    
1562    ----------------------------------------------------------------------
1563    Name: Matthias Blume
1564    Date: 2001/03/16 12:22:00 EST
1565    Tag: blume-20010316-bootfiles
1566    Description:
1567    
1568    Created a new set of bootfiles (for your automatic installation convenience).
1569    
1570    ----------------------------------------------------------------------
1571    Name: Matthias Blume
1572    Date: 2001/03/16 11:00:00 EST
1573    Tag: blume-20010316-MLTREE-fixup
1574    Description:
1575    
1576    This is a minor fixup for an (untagged) earlier commit by Allen.
1577    (A file was missing).
1578    
1579    ----------------------------------------------------------------------
1580    Name: Allen Leung
1581    Date: Mon Mar  5 18:54:57 EST 2001
1582    Tag: leunga-20010305-cut-support
1583    
1584    1. New support for alternative control-flow in MLTREE.
1585       Currently we support
1586    
1587          FLOW_TO(CALL ...., [k1,...,kn])
1588    
1589       This is needed for 'cuts to' in C-- and try/handle-like constructs
1590       in Moby
1591    
1592       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1593    
1594    2. Register Allocator
1595    
1596       Changes in interface [from Fermin, John]
1597    
1598    3. Alpha 8-bit SLL support [Fermin]
1599    
1600    4. All architectures
1601    
1602       A new module (ClusterExpandCopies) for expanding parallel copies.
1603    
1604    ----------------------------------------------------------------------
1605    Name: Allen Leung
1606    Date: 2001/02/27 23:07:00 EST
1607    Tag: leunga-20010227-minor-stuff
1608    
1609    1. Alpha bug fix for CMOVNE
1610    2. Handle mltree COND(..,FCMP ...,...)
1611    3. Bug fix in simplifier
1612    
1613    ----------------------------------------------------------------------
1614    Name: Matthias Blume
1615    Date: 2001/01/30 17:50:00 EST
1616    Tag: blume-20010130-sync
1617    Description:
1618    
1619    This is just a minor update to sync my devel branch with the main brach.
1620    The only visible change is the addition of some README files.
1621    
1622    ----------------------------------------------------------------------
1623    Name: Matthias Blume
1624    Date: 2001/01/12 23:30:00 JST
1625    Tag: blume-20010112-bootfiles
1626    Description:
1627    
1628    Made a new set of bootfiles that goes with the current state of the
1629    repository.
1630    
1631    ----------------------------------------------------------------------
1632    Name: Matthias Blume
1633    Date: 2001/01/12 21:20:00 JST
1634    Tag: blume-20010112-sync
1635    Description:
1636    
1637    I am just flushing out some minor changes that had accumulated in
1638    my private branch in order to sync with the main tree.  (This is
1639    mainly because I had CVS trouble when trying to merge _into_ my
1640    private branch.)
1641    
1642    Most people should be completely unaffected by this.
1643    
1644    ----------------------------------------------------------------------
1645    Name: Allen Leung
1646    Date: Thu Jan 11 21:03:00 EST 2001
1647    Tag: leunga-20010111-labexp=mltree
1648    Description:
1649    
1650    1.  Removed the type LabelExp and replace it by MLTree.
1651    2.  Rewritten mltree-simplify with the pattern matcher tool.
1652    3.  There were some bugs in alpha code generator which would break
1653        64-bit code generation.
1654    4.  Redo the tools to generate code with the
1655    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1656        are now generated by perl scripts.
1657    
1658    ----------------------------------------------------------------------
1659    Name: Matthias Blume
1660    Date: 2001/01/10 21:55:00 JST
1661    Tag: blume-20010110-rcc
1662    Description:
1663    
1664    The RCC stuff now seems to work (but only on the x86).
1665    This required hacking of the c-calls interface (and -implementation) in
1666    MLRISC.
1667    
1668    Normal compiler users should be unaffected.
1669    
1670    ----------------------------------------------------------------------
1671    Name: Matthias Blume
1672    Date: 2001/01/09 01:20:00 JST
1673    Tag: blume-20010109-rcc
1674    Description:
1675    
1676    This is a fairly big patch, flushing out a large number of pending
1677    changes that I made to my development copy over the last couple of days.
1678    
1679    Of practical relevance at this moment is a workaround for a pickling
1680    bug that Allen ran into the other day.  The cause of the bug itself is
1681    still unknown and it might be hard to fix it properly, but the
1682    workaround has some merits of its own (namely somewhat reducing pickling
1683    overhead for certain libraries).  Therefore, I think this solution should
1684    be satisfactory at this time.
1685    
1686    The rest of the changes (i.e., the vast majority) has to do with my
1687    ongoing efforts of providing direct support for C function calls from
1688    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1689    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1690    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1691    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1692    handle RCC.
1693    
1694    The last part (the changes to mlriscGen.sml) are still known to be
1695    wrong on the x86 and not implemented on all other architectures.  But
1696    the infrastructure is in place. I had to change a few functor
1697    signatures in the backend to be able to route the CCalls interface
1698    from MLRISC there, and I had to specialize the mltree type (on the
1699    x86) to include the necessary extensions. (The extensions themselves
1700    were already there and redy to go in MLRISC/x86).
1701    
1702    Everything should be very happy as soon as someone helps me with
1703    mlriscGen.sml...
1704    
1705    In any case, nothing of this should matter to anyone as long as the
1706    new primop is not being used (which is going to be the case unless you
1707    find it where I hid it :). The rest of the compiler is completely
1708    unaffected.
1709    
1710    ----------------------------------------------------------------------
1711    Name: Matthias Blume
1712    Date: 2001/01/05 00:30:00 JST
1713    Tag: blume-20010105-primops
1714    Description:
1715    
1716    Added some experimental support for work that I am doing right now.
1717    These changes mostly concern added primops, but there is also a new
1718    experimental C library in the runtime system (but currently not enabled
1719    anywhere except on Linux/X86).
1720    
1721    In the course of adding primops (and playing with them), I discovered that
1722    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1723    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1724    To recover, I made type information in INL_PRIM mandatory and changed
1725    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1726    has complete, correct type information (i.e., no bottom types).
1727    
1728    Since all these changes mean that we need new binfiles, I also bumped the
1729    version number to 110.32.1.
1730    
1731    ----------------------------------------------------------------------
1732    Name: Matthias Blume
1733    Date: 2000/12/30 22:10:00 JST
1734    Tag: blume-20001230-various
1735    Description:
1736    
1737    Added proxy libraries for MLRISC and let MLRISC libraries refer
1738    to each other using path anchors.  (See CM manual for explanation.)
1739    
1740    Updated CM documentation.
1741    
1742    Fixed some bugs in CM.
1743    
1744    Implemented "proxy" libraries (= syntactic sugar for CM).
1745    
1746    Added "-quiet" option to makeml and changed runtime system accordingly.
1747    
1748    Added cleanup handler for exportML to reset timers and compiler stats.
1749    
1750    ----------------------------------------------------------------------
1751    Name: Lal George
1752    Date: 2000/12/22 22:22:58 EST 2000
1753    Tag: Release_110_32
1754    Description:
1755    
1756            Infinite precision used throughout MLRISC.
1757            see MLRISC/mltree/machine-int.sig
1758    
1759    ----------------------------------------------------------------------
1760    Name: Matthias Blume
1761    Date: 2000/12/22 23:16:00 JST
1762    Tag: blume-20001222-warn
1763    Description:
1764    
1765    Corrected wording and formatting of some CM warning message which I
1766    broke in my previous patch.
1767    
1768    ----------------------------------------------------------------------
1769    Name: Matthias Blume
1770    Date: 2000/12/22 21:20:00 JST
1771    Tag: blume-20001222-anchorenv
1772    Description:
1773    
1774    Fixed CM's handling of anchor environments in connection with CMB.make.
1775    
1776    ----------------------------------------------------------------------
1777    Name: Matthias Blume
1778    Date: 2000/12/22 13:15:00 JST
1779    Tag: blume-20001222-cleanup
1780    Description:
1781    
1782    Removed src/cm/ffi which does not (and did not) belong here.
1783    
1784    ----------------------------------------------------------------------
1785    Name: Matthias Blume
1786    Date: 2000/12/21 23:55:00 JST
1787    Tag: blume-20001221-exn
1788    Description:
1789    
1790    Probably most important: CM no longer silently swallows all exceptions
1791    in the compiler.
1792    Plus: some other minor CM changes.  For example, CM now reports some
1793    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1794    
1795    ----------------------------------------------------------------------
1796    Name: Matthias Blume
1797    Date: 2000/12/15 00:01:05 JST
1798    Tag: blume-20001215-dirtool
1799    Description:
1800    
1801    - "dir" tool added.
1802    - improvements and cleanup to Tools structure
1803    - documentation updates
1804    
1805    ----------------------------------------------------------------------
1806    Name: Allen Leung
1807    Date: Thu Dec 14 03:45:24 EST 2000
1808    Description:
1809    Tag:  leunga-20001214-int-inf
1810    Description:
1811    
1812       In IntInf, added these standard functions, which are missing from our
1813    implementation:
1814    
1815        andb : int * int -> int
1816        xorb : int * int -> int
1817        orb  : int * int -> int
1818        notb : int -> int
1819         <<   : int * word -> int
1820        ~>>  : int * word -> int
1821    
1822       Not tested, I hope they are correct.
1823    
1824    ----------------------------------------------------------------------
1825    Name: Allen Leung
1826    Date: Fri Dec  8 19:23:26 EST 2000
1827    Description:
1828    Tag:  leunga-20001208-nowhere
1829    Description:
1830    
1831      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1832    to generate better error messages etc.  Plus a brief manual.
1833    
1834    ----------------------------------------------------------------------
1835    Name: Lal George
1836    Date: 2000/12/08 09:54:02 EST 2000
1837    Tag: Release_110_31
1838    Description:
1839    
1840    - Version 110.31
1841    ----------------------------------------------------------------------
1842    Name: Allen Leung
1843    Date: Thu Dec  7 22:01:04 EST 2000
1844    Tag:  leunga-20001207-cell-monster-hack
1845    Description:
1846    
1847    Major MLRISC internal changes.  Affect all clients.
1848    Summary:
1849    
1850    1.  Type CELLS.cell = int is now replaced by a datatype.
1851        As a result, the old regmap is now gone.  Almost all interfaces
1852        in MLRISC change as a consequence.
1853    
1854    2.  A new brand version of machine description tool (v3.0) that generates
1855        modules expecting the new interface.  The old version is removed.
1856    
1857    3.  The RA interface has been further abstracted into two new functors.
1858        RISC_RA and X86RA.  These functors have much simpler interfaces.
1859        [See also directory MLRISC/demo.]
1860    
1861    4.  Some other new source->source code generation tools are available:
1862    
1863        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1864        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1865           I use this tool to generate the peephole optimizers---with the new
1866           cell type changes, peephole rules are becoming difficult to write
1867           without conditional pattern matching.
1868    
1869    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1870        cover the entire MLRISC source tree so many things broke.
1871    
1872    6.  CM files have been moved to the subdirectory MLRISC/cm.
1873        They are moved because there are a lot of them and they clutter up the
1874        root dir.
1875    
1876    7.  More detailed documentation to come...
1877    
1878        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1879        a makeml -rebuild first.  This is because of other other
1880        changes that Matthias has made (see below).
1881    
1882    
1883    ----------------------------------------------------------------------
1884    Name: Matthias Blume
1885    Date: 2000/11/30 23:12:00 JST
1886    Tag: blume-20001130-filereorg
1887    Description:
1888    
1889    Some manual updates and some file reorganizations in CM.
1890    
1891    ----------------------------------------------------------------------
1892    Name: Matthias Blume
1893    Date: 2000/11/24 17:45:00 JST
1894    Tag: blume-20001124-link
1895    Description:
1896    
1897    Drastically improved link traversal code for the case that the dynamic
1898    value was already loaded at bootstrap time.  As a result, CM and CMB
1899    now both load blazingly fast -- even on a very slow machine.  Also,
1900    memory consumption has been further reduced by this.
1901    
1902    Warning: The format of the PIDMAP file has changed.  THerefore, to
1903    bootstrap you have to do this:
1904    
1905    1. Run CMB.make
1906    2. Make a symbolic link for the boot directory:
1907         ln -s sml.boot.ARCH-OS xxx
1908    3. "Rebuild" the boot directory:
1909         ./makeml -boot xxx -rebuild sml ; rm xxx
1910    4. Boot normally:
1911          ./makeml
1912    
1913    ----------------------------------------------------------------------
1914    Name: Matthias Blume
1915    Date: 2000/11/21 21:20:00 JST
1916    Tag: blume-20001121-tools
1917    Description:
1918    
1919    Continued hacking on autoloading problem -- with success this time.
1920    Also changed tool-plugin mechanism.  See new CM manual.
1921    
1922    ----------------------------------------------------------------------
1923    Name: Matthias Blume
1924    Date: 2000/11/19 14:30:00 JST
1925    Tag:  blume-20001119-autoload
1926    Description:
1927    
1928    Some hacking to make autoloading faster.  Success for CMB, no success
1929    so far for CM.  There is a reduced structure CM' that autoloads faster.
1930    (This is a temporary, non-documented hack to be eliminated again when
1931    the general problem is solved.)
1932    
1933    ----------------------------------------------------------------------
1934    Name: Matthias Blume
1935    Date: 2000/11/17 14:10:00 JST
1936    Tag: blume-20001117-pickle-lib
1937    Description:
1938    
1939    1. Eliminated comp-lib.cm
1940    2. Made pickle-lib.cm
1941    3. Eliminated all uses of intset.sml (from comp-lib.cm)
1942    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1943       equivalent constructs from smlnj-lib.cm (INtHashTable).
1944    5. Point 4. also goes for those uses of intmap.* in MLRISC.
1945       Duplicated intmap modules thrown out.
1946    6. Hunted down all duplicated SCC code and replaced it with
1947       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1948    7. Rewrote Feedback module.
1949    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
1950       should be thrown out and equivalent modules from smlnj-lib.cm
1951       should be used (IntRedBlackSet, IntListSet, ...).
1952    
1953    Confirmed that compiler compiles to fixpoint.
1954    
1955    ----------------------------------------------------------------------
1956    Name: Allen Leung
1957    Date: 2000/11/10 18:00:00
1958    Tag: leunga-20001110-new-x86-fp
1959    
1960    A new x86 floating point code generator has been added.
1961    By default this is turned off.  To turn this on, do:
1962    
1963        CM.autoload "$smlnj/compiler.cm";
1964        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
1965    
1966    Changes:
1967    
1968    1.  Changed FTAN to FPTAN so that the assembly output is correct.
1969    2.  Changed the extension callback for FTANGENT to generate:
1970    
1971              fptan
1972              fstp  %st(0)
1973        instead of
1974              fptan
1975              fstpl ftempmem
1976    
1977    3.  Numerous assembly fixes for x86.
1978    
1979    5.  Cleaned up the machine code output module x86/x86MC.sml and added
1980        support for a whole bunch of instructions and addressing modes:
1981    
1982          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
1983          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
1984          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
1985          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
1986          fxch %st(n)
1987          fld %st(n)
1988          fst %st(n)
1989          fst mem
1990          fstp %st(n)
1991          fucom %st(n)
1992          fucomp %st(n)
1993    
1994        All these are now generated when the fast fp mode is turned on.
1995    
1996    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
1997    
1998    ----------------------------------------------------------------------
1999    Name: Matthias Blume
2000    Date: 2000/11/09 11:20:00 JST
2001    Tag: blume-20001109-scc
2002    Description:
2003    
2004    Eliminated some code duplication:
2005    
2006    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2007       (Otherwise the functor is useless.)
2008    2. Used GraphSCCFn where SCCUtilFun was used previously.
2009    3. Got rid of SCCUtilFun (in comp-lib.cm).
2010    
2011    ----------------------------------------------------------------------
2012    Name: Lal George
2013    Date: 2000/11/06 09:02:21 EST 2000
2014    Tag: Release_110_30
2015    Description:
2016    
2017    - Version 110.30
2018    ----------------------------------------------------------------------
2019    Name: Matthias Blume
2020    Date: 2000/11/04 14:45:00
2021    Tag: blume-20001104-mlbuild
2022    Description:
2023    
2024    - Made ml-build faster on startup.
2025    - Documentation fixes.
2026    
2027    ----------------------------------------------------------------------
2028    Name: Matthias Blume
2029    Date: 2000/11/02 17:00:00 JST
2030    Tag: blume-20001102-condcomp
2031    Description:
2032    
2033    - Small tweaks to pickler -- new BOOTFILES!
2034    - Version bumped to 110.29.2.
2035    - Added conditional compilation facility to init.cmi (see comment there).
2036    ----------------------------------------------------------------------
2037    Name: Allen Leung
2038    Date: 2000/10/23 19:31:00
2039    Tag: leunga-20001023-demo-ra
2040    
2041    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2042    2. Test programs for the graph library updated
2043    3. Some new MLRISC demo programs added
2044    
2045    ----------------------------------------------------------------------
2046    Name: Matthias Blume
2047    Date: 2000/08/31 22:15:00 JST
2048    Tag: blume-20001017-errmsg
2049    Description:
2050    
2051    More error message grief: Where there used to be no messages, there
2052    now were some that had bogus error regions.  Fixed.
2053    
2054    ----------------------------------------------------------------------
2055    Name: Matthias Blume
2056    Date: 2000/08/31 17:30:00 JST
2057    Tag: blume-20001017-v110p29p1
2058    Description:
2059    
2060    I made a version 110.29.1 with new bootfiles.
2061    
2062    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2063              CM documentation changes and a small bugfix in CM's error reporting.
2064    
2065    ----------------------------------------------------------------------
2066    Name: Lal George
2067    Date: 2000/09/27 14:42:35 EDT
2068    Tag: george-20000927-nodestatus
2069    Description:
2070    
2071    Changed the type of the nodestatus, so that:
2072    
2073            SPILLED(~1)             is now SPILLED
2074            SPILLED(m) where m>=0   is now MEMREG(m)
2075            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2076    
2077    ----------------------------------------------------------------------
2078    Name: Matthias Blume
2079    Date: 2000/09/07 14:45:00 JST
2080    Tag: blume-20000907-cmerrmsg
2081    Description:
2082    
2083    Small tweak to CM to avoid getting ML syntax error messages twice.
2084    
2085    ----------------------------------------------------------------------
2086    Name: Matthias Blume
2087    Date: 2000/08/31 18:00:00 JST
2088    Tag: blume-20000831-cvsbootfiles
2089    Description:
2090    
2091    New URL for boot files (because the 110.29 files on the BL server do
2092    now work correctly with my updated install scripts for yacc and lex).
2093    
2094    ----------------------------------------------------------------------
2095    Name: Matthias Blume
2096    Date: 2000/08/08 12:33:00 JST
2097    Tag: blume-20000808-manual
2098    Description:
2099    
2100    Tiny update to CM manual.
2101    
2102    ----------------------------------------------------------------------
2103    Name: Allen Leung
2104    Date: 2000/08/7 19:31:00
2105    Tag: leunga-20000807-a-whole-bunch-of-stuff
2106    
2107      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2108    and Mobdy.
2109    
2110    1.  x86
2111    
2112       a.  Fixes to peephole module by John and Dan.
2113       b.  Assembly fix to SETcc by Allen.
2114       c.  Fix to c-call by John.
2115       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2116       e.  Instruction selection optimization to SETcc as suggested by John.
2117    
2118           For example,
2119    
2120            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2121    
2122           should generate:
2123    
2124            MOVL a, x
2125            SUBL b, x
2126            SHRL 31, x
2127    
2128    2.  IR stuff
2129    
2130         A bunch of new DJ-graph related algorithms added.  These
2131         speed up SSA construction.
2132    
2133    3.  SSA + Scheduling
2134    
2135         Added code for SSA and scheduling to the repository
2136    
2137    ----------------------------------------------------------------------
2138    Name: Lal George
2139    Date: 2000/07/27 11:53:14 EDT
2140    
2141    Tag: lal-20000727-linux-ppc
2142    Description:
2143    
2144     Made changes to support Linux PPC.
2145     p.s. I have confirmation that the 110.29 boot files work fine.
2146    
2147    ----------------------------------------------------------------------
2148    Name: Matthias Blume
2149    Date: 2000/07/27 17:40:00 JST
2150    Tag: blume-20000727-scripts
2151    Description:
2152    
2153    !!!! WARNING !!!!
2154    You must recompile the runtime system!
2155    !!!! WARNING !!!!
2156    
2157    This is basically another round of script-enhancements:
2158    
2159    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2160       and undefine CM preprocessor symbols.
2161    
2162    2. ml-build avoids generating a new heap image if it finds that the
2163       existing one is still ok.  (The condition is that no ML file had to
2164       be recompiled and all ML files are found to be older that the heap
2165       file.)
2166    
2167       To make this work smoothly, I also hacked the runtime system as
2168       well as SMLofNJ.SysInfo to get access to the heap image suffix
2169       (.sparc-solaris, ...) that is currently being used.
2170    
2171       Moreover, the signature of CM.mk_standalone has changed.  See the
2172       CM manual.
2173    
2174    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2175       CM manual for details.)
2176    
2177    4. More CM manual updates:
2178        - all of the above has been documented.
2179        - there is now a section describing the (CM-related) command line
2180          arguments that are accepted by the "sml" command
2181    
2182    ----------------------------------------------------------------------
2183    Name: Matthias Blume
2184    Date: 2000/07/25 16:20:00 JST
2185    Tag: blume-20000725-makedepend
2186    Description:
2187    
2188    Added a script called ml-makedepend.  This can be used in makefiles
2189    for Unix' make in a way very similar to the "makedepend" command for
2190    C.
2191    
2192    The script internally uses function CM.sources.
2193    
2194    Synopsis:
2195    
2196        ml-makedepend [-f makefile] cmfile targetname
2197    
2198    The default for the makefile is "makefile" (or "Makefile" should
2199    "makefile" not exist).
2200    
2201    ml-makedepend adds a cmfile/targetname-specific section to this
2202    makefile (after removing the previous version of this section).  The
2203    section contains a single dependency specification with targetname on
2204    the LHS (targetname is an arbitrary name), and a list of files derived
2205    from the cmfile on the RHS.  Some of the files on the RHS are
2206    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2207    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2208    path names.  The makefile writer is responsible for making sure that
2209    these variables have correct at the time "make" is invoked.
2210    
2211    ----------------------------------------------------------------------
2212    Name: Matthias Blume
2213    Date: 2000/07/22 23:30:00 JST
2214    Tag: blume-20000722-urlupdate
2215    Description:
2216    
2217    Changed BOOT and config/srcarchiveurl to point to BL server:
2218    
2219        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2220    
2221    ----------------------------------------------------------------------
2222    Name: Matthias Blume
2223    Date: 2000/07/18 18:00:00 JST
2224    Tag: blume-20000718-Version_110_29
2225    Description:
2226    
2227    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2228    
2229    2. Updated config/version to 110.29
2230    
2231    3. Updated config/srcarchiveurl
2232    
2233    3. New boot files!
2234       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2235    
2236    ----------------------------------------------------------------------
2237    Name: Matthias Blume
2238    Date: 2000/07/11 13:58:00 JST
2239    Tag: blume-20000711-doctypo
2240    Description:
2241    
2242    Fixed a few typos in CM manual.
2243    
2244    ----------------------------------------------------------------------
2245    Name: Allen Leung
2246    Date: 2000/06/15 00:38:00
2247    Tag: leunga-20000704-sparc-x86
2248    
2249    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2250    2. fix to x86 RET bug [found by Dan Grossman]
2251    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2252    
2253       Affects c-- and moby only
2254    
2255    ----------------------------------------------------------------------
2256    Name: Matthias Blume
2257    Date: 2000/07/04 15:26:00
2258    Tag: blume-20000704-trigger
2259    Description:
2260    
2261    1. Improvements to CM manual.
2262    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2263       of getting a back-trace.  The function, when called, raises an
2264       internal exception which explicitly carries the full back-trace history,
2265       so it is unaffected by any intervening handle-raise pairs ("trivial"
2266       or not).  The interactive loop will print that history once it arrives
2267       at top level.
2268       Short of having all exceptions implicitly carry the full history, the
2269       recommended way of using this facility is:
2270         - compile your program with instrumentation "on"
2271         - run it, when it raises an exception, look at the history
2272         - if the history is "cut off" because of some handler, go and modify
2273           your program so that it explicitly calls BTrace.trigger
2274         - recompile (still instrumented), and rerun; look at the full history
2275    
2276    ----------------------------------------------------------------------
2277    Name: Matthias Blume
2278    Date: 2000/07/03 15:36:00 JST
2279    Tag: blume-20000702-manual
2280    Description:
2281    
2282    Small corrections and updates to CM manual.
2283    
2284    ----------------------------------------------------------------------
2285    Name: Matthias Blume
2286    Date: 2000/06/29 16:04:00 JST
2287    Tag: blume-20000629-yacctool
2288    Description:
2289    
2290    Changes:
2291    
2292    1. Class "mlyacc" now takes separate arguments to pass options to
2293       generated .sml- and .sig-files independently.
2294    2. Corresponding CM manual updates.
2295    3. BTrace module now also reports call sites.  (However, for loop clusters
2296       it only shows from where the cluster was entered.)  There are associated
2297       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2298    
2299    ----------------------------------------------------------------------
2300    Name: Matthias Blume
2301    Date: 2000/06/27 16:51:00 JST
2302    Tag: blume-20000627-noweb
2303    Description:
2304    
2305    Changes:
2306    
2307     1. Implemented "subdir" and "witness" options for noweb tool.
2308        This caused some slight internal changes in CM's tool implementation.
2309     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2310        some remaining issues from earlier path anchor changes.
2311     3. Updated CM manual accordingly.
2312    
2313     4. Changed implementation of back-tracing so that I now consider it
2314        ready for prime-time.
2315    
2316        In particular, you don't have to explicitly trigger the back-trace
2317        anymore.  Instead, if you are running BTrace-instrumented code and
2318        there is an uncaught exception (regardless of whether or not it was
2319        raised in instrumented code), the top-level evalloop will print
2320        the back-trace.
2321    
2322        Features:
2323    
2324          - Instrumented and uninstrumented code work together seemlessly.
2325            (Of course, uninstrumented code is never mentioned in actual
2326             back-traces.)
2327    
2328          - Asymptotic time- and space-complexity of instrumented code is
2329            equal to that of uninstrumented code.  (This means that
2330            tail-recursion is preserved by the instrumentation phase.)
2331    
2332          - Modules whose code has been instrumented in different sessions
2333            work together without problem.
2334    
2335          - There is no penalty whatsoever on uninstrumented code.
2336    
2337          - There is no penalty on "raise" expressions, even in
2338            instrumented code.
2339    
2340        A potential bug (or perhaps it is a feature, too):
2341    
2342          A back-trace reaches no further than the outermost instrumented
2343          non-trivial "raise".  Here, a "trivial" raise is one that is the
2344          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2345    
2346               <exp> handle e => raise e
2347    
2348          and even
2349    
2350               <exp> handle Foo => raise Bar
2351    
2352          and, of course, through
2353    
2354               <exp> handle Foo => ...
2355    
2356         if the exception was not Foo.
2357    
2358         Back-traces always reach right through any un-instrumented code
2359         including any of its "handle" expressions, trivial or not.
2360    
2361       To try this out, do the following:
2362    
2363         - Erase all existing binfiles for your program.
2364           (You may keep binfiles for those modules where you think you
2365            definitely don't need back-tracing.)
2366         - Turn on back-trace instrumentation:
2367              SMLofNJ.Internals.BTrace.mode (SOME true);
2368         - Recompile your program.  (I.e., run "CM.make" or "use".)
2369         - You may now turn instrumentation off again (if you want):
2370              SMLofNJ.Internals.BTrace.mode (SOME false);
2371         - Run your program as usual.  If it raises an exception that
2372           reaches the interactive toplevel, then a back-trace will
2373           automatically be printed.  After that, the toplevel loop
2374           will print the exception history as usual.
2375    
2376    ----------------------------------------------------------------------
2377    Name: Matthias Blume
2378    Date: 2000/06/26 09:56:46 JST
2379    Tag: blume-20000626-setup
2380    Description:
2381    
2382    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2383          ML code before and after compiling a file (e.g., to set compiler
2384          flags)
2385    
2386    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2387              - associated changes to btrace.sml (BTrace instrumentation pass)
2388              - cleaner implementation of btimp.sml (BTrace tracing and report
2389                module)
2390    
2391    CM manual: * new path encoding documented
2392               * description of setup-parameter to "sml" added
2393    
2394    The biggest user-visible change to back-tracing is that it is no
2395    longer necessary to compile all traced modules within the same
2396    session.  (This was a real limitation.)
2397    
2398    ----------------------------------------------------------------------
2399    Name: Matthias Blume
2400    Date: 2000/06/24 12:40:00 JST
2401    Tag: blume-20000624-startup
2402    Description:
2403    
2404    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2405    bit too often -- to put it mildly. :)
2406    
2407    ----------------------------------------------------------------------
2408    Name: Matthias Blume
2409    Date: 2000/06/23 18:20:00 JST
2410    Tag: blume-20000623-btrace
2411    Description:
2412    
2413    This updates adds a backtrace facility to aid programmers in debugging
2414    their programs.  This involves the following changes:
2415    
2416    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2417       keeping track of the current call stack.  When programs are compiled
2418       in a special mode, the compiler will insert calls to these hooks
2419       into the user program.
2420       "Hook" means that it is possible for different implementations of
2421       back-tracing to register themselves (at different times).
2422    
2423    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2424       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2425       It can be turned on using this call:
2426         SMLofNJ.Internals.BTrace.mode (SOME true);
2427       Turning it off again:
2428         SMLofNJ.Internals.BTrace.mode (SOME false);
2429       Querying the current status:
2430         SMLofNJ.Internals.BTrace.mode NONE;
2431       Annotated programs are about twice as big as normal ones, and they
2432       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2433       where all hooks do nothing).  The slowdown with a plugin that is
2434       actually useful (such as the one supplied by default) is even greater,
2435       but in the case of the default plugin it is still only an constant
2436       factor (amortized).
2437    
2438    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2439       with a sub-structure BTrace for controlling back-tracing.  In particular,
2440       the above-mentioned function "mode" controls whether the annotation
2441       phase is invoked by the compiler.  Another important function is
2442       "trigger": when called it aborts the current execution and causes
2443       the top-level loop to print a full back-trace.
2444    
2445    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2446       for back-tracing.  It keeps track of the dynamic call stack and in
2447       addition to that it keeps a partial history at each "level" of that
2448       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2449       d and b (at separate times, dynamically), then the report will show:
2450    
2451       GOTO   d
2452             /c
2453       GOTO  \b
2454       CALL   a
2455    
2456       This shows that there was an initial non-tail call of a, then a
2457       tail-call to b or c, looping behavior in a cluster of functions that
2458       consist of b and c, and then a goto from that cluster (i.e., either from
2459       b or from c) to d.
2460    
2461       Note that (depending on the user program) the amount of information
2462       that the back-trace module has to keep track of at each level is bounded
2463       by a constant.  Thus, the whole implementation has the same asymptotical
2464       complexity as the original program (both in space and in time).
2465    
2466    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2467       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2468       which is raised by the "trigger" function mentioned above.
2469    
2470    Notes on usage:
2471    
2472    - Annotated code works well together with unannotated code:
2473    Unannotated calls simply do not show up at all in the backtrace.
2474    
2475    - It is not a good idea to let modules that were annotated during
2476    different sessions run at the same time.  This is because the compiler
2477    chooses small integers to identify individual functions, and there
2478    will be clashes if different modules were compiled in separate sessions.
2479    (Nothing will crash, and you will even be told about the clashes, but
2480    back-trace information will in general not be useful.)
2481    
2482    - Back-tracing can be confused by callcc and capture.
2483    
2484    - The only way of getting a back-trace right now is to explicitly
2485    invoke the "trigger" function from your user program.  Eventually, we
2486    should make every exception carry back-trace information (if
2487    available).  But since this creates more overhead at "raise"-time
2488    (similar to the current exnHistory overhead), I have not yet
2489    implemented this.  (The implementation will be rather easy.)  With
2490    exceptions carrying back-trace information, this facility will be even
2491    more useful because users don't need to modify their programs...
2492    
2493    - While it is possible to compile the compiler with back-trace
2494    annotations turned on (I did it to get some confidence in
2495    correctness), you must make absolutely sure that core.sml and
2496    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2497    be compiled with annotation because there is no core access yet, but
2498    if you compile btimp.sml with annotation, then the system will go into
2499    an infinite recursion and crash.)
2500    Since CM currently does not know about BTrace, the only way to turn
2501    annotations on and off for different modules of the compiler is to
2502    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2503    this is awkward and clumsy.
2504    
2505    Sample sessions:
2506    
2507    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2508    - SMLofNJ.Internals.BTrace.mode (SOME true);
2509    [autoloading]
2510    [autoloading done]
2511    val it = false : bool
2512    - structure X = struct
2513    -     fun main n = let
2514    -         fun a (x, 0) = d x
2515    -           | a (x, n) = b (x, n - 1)
2516    -         and b (x, n) = c (x, n)
2517    -         and c (x, n) = a (x, n)
2518    -         and d x = e (x, 3)
2519    -         and e (x, 0) = f x
2520    -           | e (x, n) = e (x, n - 1)
2521    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2522    -           | f n = n * g (n - 1)
2523    -         and g n = a (n, 3)
2524    -     in
2525    -         f n
2526    -     end
2527    - end;
2528    structure X : sig val main : int -> int end
2529    - X.main 3;
2530    *** BACK-TRACE ***
2531    GOTO   stdIn:4.2-13.20: X.main[2].f
2532    GOTO-( stdIn:4.2-13.20: X.main[2].e
2533    GOTO   stdIn:4.2-13.20: X.main[2].d
2534         / stdIn:4.2-13.20: X.main[2].a
2535         | stdIn:4.2-13.20: X.main[2].b
2536    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2537    CALL   stdIn:4.2-13.20: X.main[2].g
2538    GOTO   stdIn:4.2-13.20: X.main[2].f
2539    GOTO-( stdIn:4.2-13.20: X.main[2].e
2540    GOTO   stdIn:4.2-13.20: X.main[2].d
2541         / stdIn:4.2-13.20: X.main[2].a
2542         | stdIn:4.2-13.20: X.main[2].b
2543    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2544    CALL   stdIn:4.2-13.20: X.main[2].g
2545    GOTO   stdIn:4.2-13.20: X.main[2].f
2546    GOTO-( stdIn:4.2-13.20: X.main[2].e
2547    GOTO   stdIn:4.2-13.20: X.main[2].d
2548         / stdIn:4.2-13.20: X.main[2].a
2549         | stdIn:4.2-13.20: X.main[2].b
2550    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2551    CALL   stdIn:4.2-13.20: X.main[2].g
2552    GOTO   stdIn:4.2-13.20: X.main[2].f
2553    CALL   stdIn:2.15-17.4: X.main[2]
2554    -
2555    
2556    (Note that because of a FLINt bug the above code currently does not
2557    compile without BTrace turned on.)
2558    
2559    Here is another example, using my modified Tiger compiler:
2560    
2561    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2562    - SMLofNJ.Internals.BTrace.mode (SOME true);
2563    [autoloading]
2564    [autoloading done]
2565    val it = false : bool
2566    - CM.make "sources.cm";
2567    [autoloading]
2568    ...
2569    [autoloading done]
2570    [scanning sources.cm]
2571    [parsing (sources.cm):parse.sml]
2572    [creating directory CM/SKEL ...]
2573    [parsing (sources.cm):tiger.lex.sml]
2574    ...
2575    [wrote CM/sparc-unix/semant.sml]
2576    [compiling (sources.cm):main.sml]
2577    [wrote CM/sparc-unix/main.sml]
2578    [New bindings added.]
2579    val it = true : bool
2580    - Main.compile ("../testcases/merge.tig", "foo.out");
2581    *** BACK-TRACE ***
2582    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2583    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2584    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2585    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2586    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2587    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2588    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2589         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2590    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2591    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2592    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2593    CALL   main.sml:1.18-118.4: Main.compile[2]
2594    -
2595    
2596    ----------------------------------------------------------------------
2597    Name: Matthias Blumen
2598    Date: 2000/06/21 18:00:00 JST
2599    Tag: blume-20000621-manual
2600    Description:
2601    
2602    CM manual update: Path environments documented.
2603    
2604    ----------------------------------------------------------------------
2605    Name: Matthias Blume
2606    Date: 2000/06/19 13:40:00
2607    Tag: blume-20000619-manual
2608    Description:
2609    
2610    CM manual and system/README update.  This only covers the fact that
2611    there are no more implicit anchors.  (Path environments and the "bind"
2612    option to "cm" have yet to be documented.)
2613    
2614    ----------------------------------------------------------------------
2615    Name: Matthias Blume
2616    Date: 2000/06/19 11:05:00 JST
2617    Tag: blume-20000619-chdir-bugfix
2618    Description:
2619    
2620    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2621    
2622    ----------------------------------------------------------------------
2623    Name: Matthias Blume
2624    Date: 2000/06/18 22:00:10 JST
2625    Tag: blume-20000618-implicit-anchors-really-gone
2626    Description:
2627    
2628    I updates the previous HISTORY entry where I forgot to mention that
2629    implicit anchors are no longer with us.
2630    
2631    The current update also gets rid of the (now useless) controller
2632    CM.Control.implicit_anchors.
2633    
2634    ----------------------------------------------------------------------
2635    Name: Matthias Blume
2636    Date: 2000/06/16 17:30:00 JST
2637    Tag: blume-20000616-anchorenv
2638    Description:
2639    
2640    This patch implements the long anticipated (just kidding :) "anchor
2641    environment" mechanism.  In the course of doing this, I also
2642    re-implemented CM's internal "SrcPath" module from scratch.  The new
2643    one should be more robust in certain boundary cases.  In any case, it
2644    is a lot cleaner than its predecessor (IMHO).
2645    
2646    This time, although there is yet another boot file format change, I
2647    kept the unpickler backward-compatible.  As a result, no new bootfiles
2648    are necessary and bootstrapping is straightforward.  (You cannot read
2649    new bootfiles into an old system, but the other way around is no
2650    problem.)
2651    
2652    Visible changes:
2653    
2654    ** 0. Implicit path anchors (without the leading $-symbol) are no
2655    longer recognized at all. This means that such path names are not
2656    illegal either.  For example, the name basis.cm simply refers to a
2657    local file called "basis.cm" (i.e, the name is an ordinary path
2658    relative to .cm-files directory).  Or, to put it differently, only
2659    names that start with $ are anchored paths.
2660    
2661    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2662    vanished.
2663    
2664    John (Reppy) had critizised this as soon as I originally proposed and
2665    implemented it, but at that time I did not really deeply believe
2666    him. :) Now I came full-circle because I need the $<singlearc> syntax
2667    in another place where it cannot be seen as an abbreviation for
2668    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2669    seems to mean (i.e., it "expands" into the corresponding anchor
2670    value).
2671    
2672    However, when paths are used as members in CM description files, it
2673    continues to be true that there must be at least another arc after the
2674    anchor.  This is now enforced separately during semantic analysis
2675    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2676    
2677    ** 2. The "cm" class now accepts an option "bind".  The option's value
2678    is a sub-option list of precisely two items -- one labeled "anchor"
2679    and the other one labeled "value".  As you might expect, "anchor" is
2680    used to specify an anchor name to be bound, and "value" specifies what
2681    the anchor is being bound to.
2682    
2683    The value must be a directory name and can be given in either standard
2684    syntax (including the possibility that it is itself an anchored path)
2685    or native syntax.
2686    
2687    Examples:
2688    
2689       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2690       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2691    
2692    and so on.
2693    
2694    The meaning of this is that the .cm-file will be processed with an
2695    augmented anchor environment where the given anchor(s) is/are bound to
2696    the given values(s).
2697    
2698    The rationale for having this feature is this: Suppose you are trying
2699    to use two different (already stable) libraries a.cm and b.cm (that
2700    you perhaps didn't write yourself).  Further, suppose each of these
2701    two libraries internally uses its own auxiliary library $aux/lib.cm.
2702    Normally you would now have a problem because the anchor "lib" can not
2703    be bound to more than one value globally.  Therefore, the project that
2704    uses both a.cm and b.cm must locally redirect the anchor to some other
2705    place:
2706    
2707       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2708       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2709    
2710    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2711    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2712    
2713    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2714    you when you do so at the time of CM.stabilize).  Therefore, you can
2715    also use an anchored path as the value:
2716    
2717      a.cm (bind:(anchor:lib value:$a-lib))
2718      b.cm (bind:(anchor:lib value:$b-lib))
2719    
2720    Now you can globally configure (using the usual CM.Anchor.anchor or
2721    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2722    itself is always locally bound, setting it globally is no longer
2723    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2724    can still be used as a global anchor for separate purposes.  As a
2725    matter of fact, one can locally define "lib" in terms of a global
2726    "lib":
2727    
2728      a.cm (bind:(anchor:lib value:$lib/a))
2729      b.cm (bind:(anchor:lib value:$lib/b))
2730    
2731    ** 3: The encoding of path names has changed.  This affects the way
2732    path names are shown in CM's progress report and also the internal
2733    protocol encoding used for parallel make.
2734    
2735    The encoding now uses one or more ':'-separated segments.  Each
2736    segments corresponds to a file that has been specified relative to the
2737    file given by its preceding segment.  The first segment is either
2738    relative to the CWD, absolute, or anchored.  Each segment itself is
2739    basically a Unix pathname; all segments but the first are relative.
2740    
2741    Example:
2742    
2743       $foo/bar/baz.cm:a/b/c.sml
2744    
2745    This path denotes the file bar/a/b/c.sml relative to the directory
2746    denoted by anchor "foo".  Notice that the encoding also includes
2747    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2748    paths are resolved relative to the .cm-files directory, so baz.cm must
2749    be ignored to get the "real" pathname.
2750    
2751    To make this fact more obvious, CM puts the names of such "virtual
2752    arcs" into parentheses when they appear in progress reports. (No
2753    parentheses will appear in the internal protocol encoding.)  Thus,
2754    what you really see is:
2755    
2756      $foo/bar/(baz.cm):a/b/c.sml
2757    
2758    I find this notation to be much more informative than before.
2759    
2760    Another new feature of the encoding is that special characters
2761    including parentheses, colons, (back)slashes, and white space are
2762    written as \ddd (where ddd is the decimal encoding of the character).
2763    
2764    *** The CM manual still needs to be updated.
2765    
2766    ----------------------------------------------------------------------
2767    Name: Allen Leung
2768    Date: 2000/06/15 00:38:00
2769    Tag: leunga-20000615-x86-peephole
2770    
2771    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2772    
2773    ----------------------------------------------------------------------
2774    Name: Matthias Blume
2775    Date: 2000/06/12 11:40:00
2776    Tag: blume-20000612-parmakefix
2777    Description:
2778    
2779    More cleanup after changing the file naming scheme: This time I
2780    repaired the parallel make mechanism for CMB.make which I broke earlier.
2781    
2782    ----------------------------------------------------------------------
2783    Name: Allen Leung
2784    Date: 2000/06/09 01:25:00
2785    Tag: leunga-20000609-various
2786    
2787    None of these things should affect normal SML/NJ operations
2788    
2789    1. Peephole improvements provided by Fermin (c--)
2790    2. New annotation DEFUSE for adding extra dependence (moby)
2791    3. New X86 LOCK instructions (moby)
2792    4. New machine description language for reservation tables (scheduling)
2793    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2794       trees etc.)
2795    6. I've changed the CM files so that they can work with versions
2796       110.0.6, 110.25 and 110.28
2797    
2798  ----------------------------------------------------------------------  ----------------------------------------------------------------------
2799  Name: Matthias Blume  Name: Matthias Blume
2800  Date: 2000/06/09 12:40:00  Date: 2000/06/09 12:40:00
# Line 574  Line 3358 
3358    
3359  3.  Assembly  3.  Assembly
3360    
3361      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
3362      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
3363      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
3364    
# Line 597  Line 3381 
3381    
3382  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
3383  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
3384  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
3385  legal surface-syntax symbol).  legal surface-syntax symbol).
3386    
3387  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 607  Line 3391 
3391  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
3392    
3393  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3394  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
3395  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
3396  more details.  more details.
3397    
# Line 722  Line 3506 
3506     (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
3507     used).     used).
3508    
3509     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3510     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3511     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3512    
3513     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 735  Line 3519 
3519    
3520     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3521    
3522     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3523     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3524    
3525  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 766  Line 3550 
3550       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3551       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3552       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
3553       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3554       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3555       Dave's hands. :)       Dave's hands. :)
3556    
# Line 869  Line 3653 
3653    
3654       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3655       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3656       testl is perferable to andl.       testl is preferable to andl.
3657    
3658  7. RA (x86 only)  7. RA (x86 only)
3659    
# Line 1051  Line 3835 
3835    
3836  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3837  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3838  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
3839  explanation.  explanation.
3840    
3841  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3842  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3843  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3844  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 1098  Line 3882 
3882  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
3883  <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,
3884  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
3885  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3886  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3887  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3888    
# Line 1148  Line 3932 
3932    it from that remote directory.    it from that remote directory.
3933    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3934    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3935    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3936    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3937    
3938    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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