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Diff of /sml/trunk/HISTORY

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revision 673, Wed Jun 21 08:57:07 2000 UTC revision 1053, Wed Feb 6 19:11:13 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: Lal George
17    Date: 2002/02/06 13:55:02 EST
18    Tag: george-20020206-ra-breakup
19    Description:
20    
21    1. A bug fix from Allen.
22    
23        A typo causes extra fstp %st(0)'s to be generated at compensation
24        edges, which might cause stack underflow traps at runtime.  This
25        occurs in fft where there are extraneous fstps right before the 'into'
26        trap instruction (in this case they are harmless since none of the
27        integers overflow.)
28    
29    2. Plugged out various utility modules that were embedded in the modules
30       of the register allocator. I need these modules for other purposes, but
31       they are not complete enough to put into a library just yet.
32    ----------------------------------------------------------------------
33    Name: Matthias Blume
34    Date: 2002/01/31 16:05:00 EST
35    Tag: blume-20020131-sparc-ccalls
36    Description:
37    
38    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
39       of extra stack space by mistake.  Fixed.
40    
41    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
42    
43    ----------------------------------------------------------------------
44    Name: Allen Leung
45    Date: 2002/01/30
46    Tag: leunga-20020130-nowhere-bug-fix
47    Description:
48    
49       MLRISC bug fixes:
50       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
51       2. MachineInt.fromString was negating its value.
52    
53    ----------------------------------------------------------------------
54    Name: Matthias Blume
55    Date: 2002/01/29
56    Tag: blume-20020129-INSTALL
57    Description:
58    
59    - Added somewhat detailed installation instructions (file INSTALL).
60    - Fixed curl-detection bug in config/install.sh.
61    - It is now possible to select the URL getter using the URLGETTER
62      environment variable:
63    
64          not set / "unknown"      --> automatic detection (script tries wget,
65                                       curl, and lynx)
66          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
67                                       how to properly invoke them)
68          other                    --> use $URLGETTER directly, it must take
69                                       precisely two command-line arguments
70                                       (source URL and destination file name)
71    
72    ----------------------------------------------------------------------
73    Name: Matthias Blume
74    Date: 2002/01/28
75    Tag: blume-20020128-sparc-ccalls
76    Description:
77    
78    - Fixed problem with calculation of "used" registers in sparc-c-calls.
79    - Make use of the allocParam argument in sparc-c-calls.
80    
81    ----------------------------------------------------------------------
82    Name: Matthias Blume
83    Date: 2002/01/28
84    Tag: blume-20020128-allocParam
85    Description:
86    
87    John Reppy:  Changes c-calls API to accept client-callback for
88    allocating extra stack space.
89    me: Corresponding changes to mlriscGen (using a dummy argument that
90        does not change the current behavior).
91    
92    ----------------------------------------------------------------------
93    Name: Matthias Blume
94    Date: 2002/01/28 12:00:00
95    Tag: Release_110_38
96    Description:
97    
98    This time for real!!!
99    
100    ----------------------------------------------------------------------
101    Name: Matthias Blume
102    Date: 2002/01/28 10:56:00 EST
103    Tag: blume-20020128-retraction
104    Description:
105    
106    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
107       with blume-Release_110_38-retracted.)
108    
109    1. Fixed a problem with incorrect rounding modes in real64.sml.
110       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
111    
112    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
113       and enums fixed.  The naming of corresponding ML identifiers should
114       now be consistent again.
115    
116    ----------------------------------------------------------------------
117    Name: Allen Leung
118    Date: 2002/01/27
119    Tag: leunga-20020127-nowhere
120    Description:
121    
122       Added a target called nowhere in the configuration scripts.
123       Enabling this will build the MLRISC 'nowhere' tool (for translating
124       programs with where-clauses into legal SML code) during installation.
125    
126    ----------------------------------------------------------------------
127    Name: Matthias Blume
128    Date: 2002/01/25 21:27:00 EST
129    Tag: blume-Release_110_38-retracted
130    Description:
131    
132    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
133    
134    README will be added later.
135    
136    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
137    (Release_110_38) removed.  Reason: Last-minute bug fixes.
138    
139    ----------------------------------------------------------------------
140    Name: Matthias Blume
141    Date: 2002/01/25
142    Tag: blume-20020125-ffi
143    Description:
144    
145    A large number of tweaks and improvements to ml-nlffi-lib and
146    ml-nlffigen:
147    
148       - ML represenation types have been streamlined
149       - getter and setter functions work with concrete values, not abstract
150         ones where possible
151       - ml-nlffigen command line more flexible (see README file there)
152       - some bugs have been fixed (hopefully)
153    
154    ----------------------------------------------------------------------
155    Name: Lal George
156    Date: 2002/01/24
157    Tag: george-20020124-risc-ra-interface
158    Description:
159    
160       There is a dramatic simplification in the interface to the
161       register allocator for RISC architectures as a result of making
162       parallel copy instructions explicit.
163    
164    ----------------------------------------------------------------------
165    Name: Matthias Blume
166    Date: 2002/01/22
167    Tag: blume-20020122-x86-ccalls
168    Description:
169    
170    Bug fix for c-calls on x86 (having to do with how char- and
171    short-arguments are being handled).
172    
173    ----------------------------------------------------------------------
174    Name: Matthias Blume
175    Date: 2002/01/21
176    Tag: blume-20020121-ff
177    Description:
178    
179    Another day of fiddling with the FFI...
180    
181    1. Bug fix/workaround:  CKIT does not complain about negative array
182       dimensions, so ml-nlffigen has to guard itself against this possibility.
183       (Otherwise a negative dimension would send it into an infinite loop.)
184    
185    2. Some of the abstract types (light objects, light pointers, most "base"
186       types) in structure C are now eqtypes.
187    
188    3. Added constructors and test functions for NULL function pointers.
189    
190    ----------------------------------------------------------------------
191    Name: Matthias Blume
192    Date: 2002/01/18
193    Tag: blume-20020118-ready-for-new-release
194    Description:
195    
196    Made config/srcarchiveurl point to a new place.  (Will provide boot
197    files shortly.)
198    
199    Maybe we christen this to be 110.38?
200    
201    ----------------------------------------------------------------------
202    Name: Matthias Blume
203    Date: 2002/01/18
204    Tag: blume-20020118-more-ffifiddle
205    Description:
206    
207    Today's FFI fiddling:
208    
209      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
210        C.Set.* that use concrete (MLRep.*) arguments and results instead
211        of abstract ones.
212    
213      - Provided word-style bit operations etc. for "int" representation
214        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
215        and Long.
216    
217    ----------------------------------------------------------------------
218    Name: Matthias Blume
219    Date: 2002/01/18
220    Tag: blume-20020118-use-x86-fp
221    Description:
222    
223    Now that x86-fast-fp seems to be working, I turned it back on again
224    by default.  (Seems to work fine now, even with the FFI.)
225    
226    Other than that, I added some documentation about the FFI to
227    src/ml-nlffigen/README and updated the FFI test examples in
228    src/ml-nlffi-lib/Tests/*.
229    
230    ----------------------------------------------------------------------
231    Name: Allen Leung
232    Date: 2002/01/17
233    Tag: leunga-20020117-x86-fast-fp-call
234    Description:
235    
236       1. Fixed a problem with handling return fp values when x86's fast fp
237          mode is turned on.
238    
239       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
240          of %f32.
241    
242       3. Added a constructor INT32lit to the ast of MLRISC tools.
243    
244    ----------------------------------------------------------------------
245    Name: Matthias Blume
246    Date: 2002/01/16
247    Tag: blume-20020116-ffifiddle
248    Description:
249    
250    More fiddling with the FFI interface:
251    
252     - Make constness 'c instead of rw wherever possible.  This eliminates
253       the need for certain explicit coercions.  (However, due to ML's
254       value polymorphism, there will still be many cases where explicit
255       coercions are necessary.  Phantom types are not the whole answer
256       to modeling a subtyping relationship in ML.)
257    
258     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
259    
260     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
261       clumsy workaround for varargs problem.)
262    
263    ----------------------------------------------------------------------
264    Name: Lal George
265    Date: 2002/01/15
266    Tag: <none>
267    Description:
268    
269    1. Since COPY instructions are no longer native to the architecture,
270       a generic functor can be used to implement the expandCopies function.
271    
272    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
273       TEXT segment.
274    
275    ----------------------------------------------------------------------
276    Name: Matthias Blume
277    Date: 2002/01/15
278    Tag: blume-20020115-ffiupdates
279    Description:
280    
281    1. Fix for bug resulting in single-precision float values being returned
282       incorrectly from FFI calls.
283    
284    2. Small modifications to C FFI API:
285    
286        - memory-allocation routines return straight objects (no options)
287          and raise an exception in out-of-memory situations
288        - unsafe extensions to cast between function pointers and pointers
289          from/to ints
290        - added structure C_Debug as an alternative to structure C where
291          pointer-dereferencing (|*| and |*!) always check for null-pointers
292        - added open_lib' to DynLinkage;  open_lib' works like open_lib
293          but also takes a (possibly empty) list of existing library handles
294          that the current library depends on
295    
296    ----------------------------------------------------------------------
297    Name: Matthias Blume
298    Date: 2002/01/10
299    Tag: blume-20020110-newffigen
300    Description:
301    
302    1. Updates to portable graph code.
303    
304    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
305       more scalable now so that even huge interfaces such as the one
306       for GTK compile in finite time and space. :-)
307       See src/ml-nlffigen/README for details on what's new.
308    
309    ----------------------------------------------------------------------
310    Name: Lal George
311    Date: 2001/01/09 14:31:35 EST 2002
312    Tag: george-20011206-rm-native-copy
313    Description:
314    
315            Removed the native COPY and FCOPY instructions
316            from all the architectures and replaced it with the
317            explicit COPY instruction from the previous commit.
318    
319            It is now possible to simplify many of the optimizations
320            modules that manipulate copies. This has not been
321            done in this change.
322    
323    ----------------------------------------------------------------------
324    Name: Lal George
325    Date: 2001/12/06 16:50:13 EST 2001
326    Tag: george-20011206-mlrisc-instruction
327    Description:
328    
329    Changed the representation of instructions from being fully abstract
330    to being partially concrete. That is to say:
331    
332      from
333            type instruction
334    
335      to
336            type instr                              (* machine instruction *)
337    
338            datatype instruction =
339                LIVE of {regs: C.cellset, spilled: C.cellset}
340              | KILL of {regs: C.cellset, spilled: C.cellset}
341              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
342              | ANNOTATION of {i: instruction, a: Annotations.annotation}
343              | INSTR of instr
344    
345    This makes the handling of certain special instructions that appear on
346    all architectures easier and uniform.
347    
348    LIVE and KILL say that a list of registers are live or killed at the
349    program point where they appear. No spill code is generated when an
350    element of the 'regs' field is spilled, but the register is moved to
351    the 'spilled' (which is present, more for debugging than anything else).
352    
353    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
354    We used to generate:
355    
356            DEFFREG f1
357            f1 := f2 + f3
358            trapb
359    
360    but now generate:
361    
362            f1 := f2 + f3
363            trapb
364            LIVE {regs=[f1,f2,f3], spilled=[]}
365    
366    Furthermore, the DEFFREG (hack) required that all floating point instruction
367    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
368    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
369    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
370    this architecture).
371    
372    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
373    all the architectures. This will result in further simplification of the
374    register allocator that must be aware of them for coalescing purposes, and
375    will also simplify certain aspects of the machine description that provides
376    callbacks related to parallel copies.
377    
378    ANNOTATION should be obvious, and now INSTR represents the honest to God
379    machine instruction set!
380    
381    The <arch>/instructions/<arch>Instr.sml files define certain utility
382    functions for making porting easier -- essentially converting upper case
383    to lower case. All machine instructions (of type instr) are in upper case,
384    and the lower case form generates an MLRISC instruction. For example on
385    the alpha we have:
386    
387      datatype instr =
388         LDA of {r:cell, b:cell, d:operand}
389       | ...
390    
391      val lda : {r:cell, b:cell, d:operand} -> instruction
392        ...
393    
394    where lda is just (INSTR o LDA), etc.
395    
396    ----------------------------------------------------------------------
397    Name: Matthias Blume
398    Date: 2001/11/22 21:40:00 EST
399    Tag: Release_110_37
400    Description:
401    
402    Release 110.37.  This time for real.
403    
404    ----------------------------------------------------------------------
405    Name: Matthias Blume
406    Date: 2001/11/21 16:35:00 EST
407    Tag: blume-20011121-foot-in-mouth
408    Description:
409    
410    Removed the "Release_110_37" tag because of a serious bug.
411    This will be re-tagged once the bug is fixed.
412    
413    ----------------------------------------------------------------------
414    Name: Matthias Blume
415    Date: 2001/11/21 16:14:00 EST
416    Tag: blume-20011121-forgottenfile
417    Description:
418    
419    Forgot to add a file.  (Just a .tex-file -- part of
420    the CM manual source.)
421    
422    ----------------------------------------------------------------------
423    Name: Matthias Blume
424    Date: 2001/11/21 16:10:00 EST
425    Tag: blume-20011121-invalid_110_37
426    Description:
427    
428    Note: I removed the original tag "Release_110_37" from this commit
429          because we found a serious bug in all non-x86 backends.
430          - Matthias
431    
432    1. Modifications to the SML/NJ code generator and to the runtime system
433       so that code object name strings are directly inserted into code
434       objects at code generation time.  The only business the runtime system
435       has with this is now to read the name strings on occasions.
436       (The encoding of the name string has also changed somewhat.)
437    
438    2. CM now implements a simple "set calculus" for specifying export lists.
439       In particular, it is now possible to refer to the export lists of
440       other libraries/groups/sources and form unions as well as differences.
441       See the latest CM manual for details.
442    
443    3. An separate notion of "proxy" libraries has again be eliminated from
444       CM's model.  (Proxy libraries are now simply a special case of using
445       the export list calculus.)
446    
447    4. Some of the existing libraries now take advantage of the new set
448       calculus.
449       (Notice that not all libraries have been converted because some
450       of the existing .cm-files are supposed to be backward compatible
451       with 110.0.x.)
452    
453    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
454       "General.exnMessage"!  The former relies on a certain hook to be
455       initialized, and that often does not happen in the stand-alone case.)
456    
457    ----------------------------------------------------------------------
458    Name: Lal George
459    Date: 2001/11/21  13:56:18 EST
460    Tag: george-2001121-pseudo-ops
461    Description:
462    
463      Implemented a complete redesign of MLRISC pseudo-ops. Now there
464      ought to never be any question of incompatabilities with
465      pseudo-op syntax expected by host assemblers.
466    
467      For now, only modules supporting GAS syntax are implemented
468      but more should follow, such as MASM, and vendor assembler
469      syntax, e.g. IBM as, Sun as, etc.
470    
471    ----------------------------------------------------------------------
472    Name: Matthias Blume
473    Date: 2001/11/14 11:52:00 EST
474    Tag: blume-20011114-srcname
475    Description:
476    
477    1. Routed the name of the current source file to mlriscgen where it
478       should be directly emitted into the code object.  (This last part
479       is yet to be done.)
480    
481    2. Some cleanup of the pgraph code to make it match the proposal that
482       I put out the other day.  (The proposal notwithstanding, things are
483       still in flux here.)
484    
485    ----------------------------------------------------------------------
486    Name: Lal George
487    Date: 2001/11/14 09:44:04 EST
488    Tag:
489    Description:
490    
491      Fix for a backpatching bug reported by Allen.
492    
493      Because the boundary between short and long span-dependent
494      instructions is +/- 128, there are an astounding number of
495      span-dependent instructions whose size is over estimated.
496    
497      Allen came up with the idea of letting the size of span
498      dependent instructions be non-monotonic, for a maxIter
499      number of times, after which the size must be monotonically
500      increasing.
501    
502      This table shows the number of span-dependent instructions
503      whose size was over-estimated as a function of maxIter, for the
504      file Parse/parse/ml.grm.sml:
505    
506         maxIter            # of instructions:
507            10                      687
508            20                      438
509            30                      198
510            40                        0
511    
512      In compiling the compiler, there is no significant difference in
513      compilation speed between maxIter=10 and maxIter=40. Actually,
514      my measurements showed that maxIter=40 was a tad faster than
515      maxIter=10! Also 96% of the  files in the compiler reach a fix
516      point within 13 iterations, so fixing maxIter at 40, while high,
517      is okay.
518    
519    ----------------------------------------------------------------------
520    Name: Matthias Blume
521    Date: 2001/10/31 15:25:00 EST
522    Tag: blume-20011031-pgraph
523    Description:
524    
525    CKIT:
526    * Changed the "Function" constructor of type Ast.ctype to carry optional
527      argument identifiers.
528    * Changed the return type of TypeUtil.getFunction accordingly.
529    * Type equality ignores the argument names.
530    * TypeUtil.composite tries to preserve argument names but gives up quickly
531      if there is a mismatch.
532    
533    installation script:
534    * attempts to use "curl" if available (unless "wget" is available as well)
535    
536    CM:
537    * has an experimental implementation of "portable graphs" which I will
538      soon propose as an implementation-independent library format
539    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
540    
541    NLFFI-LIB:
542    * some cleanup (all cosmetic)
543    
544    NLFFIGEN:
545    * temporarily disabled the mechanism that suppresses ML output for
546      C definitions whose identifiers start with an underscore character
547    * generate val bindings for enum constants
548    * user can request that only one style (light or heavy) is being used;
549      default is to use both (command-line arguments: -heavy and -light)
550    * fixed bug in handling of function types involving incomplete pointers
551    * generate ML entry points that take record arguments (i.e., using
552      named arguments) for C functions that have a prototype with named
553      arguments
554      (see changes to CKIT)
555    
556    ----------------------------------------------------------------------
557    Name: Allen Leung
558    Date: 2001/10/27 20:34:00 EDT
559    Tag: leunga-20011027-x86-fast-fp-call
560    Description:
561    
562       Fixed the bug described in blume-20010920-slowfp.
563    
564       The fix involves
565          1. generating FCOPYs in FSTP in ia32-svid
566          2. marking a CALL with the appropriate annotation
567    
568    ----------------------------------------------------------------------
569    Name: Matthias Blume
570    Date: 2001/10/16 11:32:00 EDT
571    Tag: blume-20011016-netbsd
572    Description:
573    
574    Underscore patch from Chris Richards (fixing problem with compiling
575    runtime system under recent NetBSD).
576    
577    ----------------------------------------------------------------------
578    Name: Allen Leung
579    Date: 2001/10/12 17:18:32 EDT 2001
580    Tag: leung-20011012-x86-printflowgraph
581    Description:
582    
583    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
584    
585    ----------------------------------------------------------------------
586    Name: Lal George
587    Date: 2001/10/11 23:51:34 EDT
588    Tag: george-20011011-too-many-instrs
589    Description:
590    
591    The representation of a program point never expected to see more
592    than 65536 instructions in a basic block!
593    
594    ----------------------------------------------------------------------
595    Name: Lal George
596    Date: 2001/10/09 09:41:37 EDT
597    Tag: george-20011008-mlrisc-labels
598    Description:
599    
600    Changed the machine description files to support printing of
601    local and global labels in assembly code, based on host assembler
602    conventions.
603    
604    ----------------------------------------------------------------------
605    Name: Matthias Blume
606    Date: 2001/09/25 15:25:00 EDT
607    Tag: blume-20010925-exninfo
608    Description:
609    
610    I provided a non-hook implementation of exnName (at the toplevel) and
611    made the "dummy" implementation of exnMessage (at the toplevel) more
612    useful: if nothing gets "hooked in", then at least you are going to
613    see the exception name and a message indicating why you don't see more.
614    
615    [For the time being, programs that need exnMessage and want to use
616    ml-build should either use General.exnMessage (strongly recommended) or
617    refer to structure General at some other point so that CM sees a
618    static dependency.]
619    
620    [Similar remarks go for "print" and "use":  If you want to use their
621    functionality in stand-alone programs generated by ml-build, then use
622    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
623    
624    ----------------------------------------------------------------------
625    Name: Matthias Blume
626    Date: 2001/09/20 17:28:00 EDT
627    Tag: blume-20010920-slowfp
628    Description:
629    
630    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
631    
632    ----------------------------------------------------------------------
633    Name: Matthias Blume
634    Date: 2001/09/20 17:20:00 EDT
635    Tag: blume-20010920-canonicalpaths
636    Description:
637    
638    0. Updated the BOOT file (something that I forgot to do earlier).
639    
640    1. Small internal change to CM so that it avoids "/../" in filenames
641       as much as possible (but only where it is safe).
642    
643    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
644       that arguments that contain delimiters are passed through correctly.
645       This change also means that all "special" arguments of the form
646       @SMLxxx... must come first.
647    
648    3. Changed install script to put relative anchor names for tool commands
649       into pathconfig.
650    
651    ----------------------------------------------------------------------
652    Name: Matthias Blume
653    Date: 2001/09/18 15:35:00 EDT
654    Tag: blume-20010918-readme11036
655    Description:
656    
657    Added README files.
658    
659    ----------------------------------------------------------------------
660    Name: Matthias Blume
661    Date: 2001/09/18 11:45:00 EDT
662    Tag: Release_110_36 (retag)
663    Description:
664    
665    Fixed mistake in config/preloads. Retagged as 110.36.
666    
667    ----------------------------------------------------------------------
668    Name: Matthias Blume
669    Date: 2001/09/18 09:40:00 EDT
670    Tag: Release_110_36_orig (tag changed)
671    Description:
672    
673    New version (110.36).  New bootfiles.
674    
675    ----------------------------------------------------------------------
676    Name: Matthias Blume
677    Date: 2001/09/14 16:15:00 EDT
678    Tag: blume-20010914-x86fastfp
679    Description:
680    
681    John committed some changes that Allen made, in particular a (hopefully)
682    correctly working version of the x86-fp module.
683    
684    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
685    flag to "true".  Everything seems to compile to a fixpoint ok, and
686    "mandelbrot" speeds up by about 15%.
687    
688    ----------------------------------------------------------------------
689    Name: Matthias Blume
690    Date: 2001/09/13 11:20:00 EDT
691    Tag: blume-20010913-minimal
692    Description:
693    
694    1. Stefan Monnier's patch to fix a miscompilation problem that
695       was brought to light by John Reppy's work on Moby.
696    
697    2. Implemented a minimal "structure Compiler" that contains just
698       "version" and "architecture".  The minimal version will be
699       available when the full version is not.  This is for backward-
700       compatibility with code that wants to test Compiler.version.
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2001/08/28 14:03:00 EDT
705    Tag: blume-20010828-ml-lex
706    Description:
707    
708    Fix for bug 1581, received from Neophytos Michael.
709    
710    ----------------------------------------------------------------------
711    Name: Matthias Blume
712    Date: 2001/08/27 11:20:00 EDT
713    Tag: blume-20010827-readme11035
714    Description:
715    
716    Fleshed out the README file for 110.35.
717    
718    ----------------------------------------------------------------------
719    Name: Matthias Blume
720    Date: 2001/08/24 17:10:00 EDT
721    Tag: Release_110_35
722    Description:
723    
724    New version number (110.35).  New bootfiles.
725    
726    ----------------------------------------------------------------------
727    Name: Lal George
728    Date: 2001/08/24 13:47:18 EDT 2001
729    Tag: george-20010824-MLRISC-graphs
730    Description:
731    
732     removed clusters from MLRISC completely and replaced with graphs.
733    
734    ----------------------------------------------------------------------
735    Name: Matthias Blume
736    Date: 2001/08/23 17:50:00 EDT
737    Tag: blume-20010823-toplevel
738    Description:
739    
740    - some reorganization of the code that implements various kinds of
741      environments in the compiler (static, dynamic, symbolic, combined)
742    - re-implemented the EnvRef module so that evalStream works properly
743      (if the stream contains references to "use", "CM.make", etc.)
744    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
745    
746    ----------------------------------------------------------------------
747    Name: Matthias Blume
748    Date: 2001/08/20 15:50 EDT
749    Tag: blume20010820-slipup
750    Description:
751    
752    I forgot to commit a few files.  Here they are...
753    
754    ----------------------------------------------------------------------
755    Name: Matthias Blume
756    Date: 2001/08/20 15:35:00 EDT
757    Tag: blume-20010820-debugprof
758    Description:
759    
760    !!!! NEW BOOTFILES !!!!
761    
762    This is another round of reorganizing the compiler sources.  This
763    time the main goal was to factor out all the "instrumentation"
764    passes (for profiling and backtracing) into their own library.
765    The difficulty was to do it in such a way that it does not depend
766    on elaborate.cm but only on elabdata.cm.
767    
768    Therefore there have been further changes to both elaborate.cm and
769    elabdata.cm -- more "generic" things have been moved from the former
770    to the latter.  As a result, I was forced to split the assignment
771    of numbers indicating "primtyc"s into two portions: SML-generic and
772    SML/NJ-specific.  Since it would have been awkward to maintain,
773    I bit the bullet and actually _changed_ the mapping between these
774    numbers and primtycs.  The bottom line of this is that you need
775    a new set of bin- and bootfiles.
776    
777    I have built new bootfiles for all architectures, so doing a fresh
778    checkout and config/install.sh should be all you need.
779    
780    The newly created library's name is
781    
782        $smlnj/viscomp/debugprof.cm
783    
784    and its sources live under
785    
786        src/compiler/DebugProf
787    
788    ----------------------------------------------------------------------
789    Name: Matthias Blume
790    Date: 2001/08/15 17:15:00 EDT
791    Tag: blume-20010815-compreorg
792    Description:
793    
794    This is a first cut at reorganizing the CM libraries that make up the
795    core of the compiler.  The idea is to separate out pieces that could
796    be used independently by tools, e.g., the parser, the typechecker, etc.
797    
798    The current status is a step in this direction, but it is not quite
799    satisfactory yet.  Expect more changes in the future.
800    
801    Here is the current (new) organization...
802    
803        What used to be $smlnj/viscomp/core.cm is now divided into
804        six CM libraries:
805    
806             $smlnj/viscomp/basics.cm
807                           /parser.cm
808                           /elabdata.cm
809                           /elaborate.cm
810                           /execute.cm
811                           /core.cm
812    
813        The CM files for these libraries live under src/system/smlnj/viscomp.
814        All these libraries are proxy libraries that contain precisely
815        one CM library component.  Here are the locations of the components
816        (all within the src/compiler tree):
817    
818             Basics/basics.cm
819             Parse/parser.cm
820             ElabData/elabdata.cm
821             Elaborator/elaborate.cm
822             Execution/execute.cm
823             core.cm
824    
825         [This organization is the same that has been used already
826         for a while for the architecture-specific parts of the visible
827         compiler and for the old version of core.cm.]
828    
829         As you will notice, many source files have been moved from their
830         respective original locations to a new home in one of the above
831         subtrees.
832    
833         The division of labor between the new libraries is the following:
834    
835             basics.cm:
836                - Simple, basic definitions that pertain to many (or all) of
837                  the other libraries.
838             parser.cm:
839                - The SML parser, producing output of type Ast.dec.
840                - The type family for Ast is also defined and exported here.
841             elabdata.cm:
842                - The datatypes that describe input and output of the elaborator.
843                  This includes types, absyn, and static environments.
844             elaborator.cm:
845                - The SML/NJ type checker and elaborator.
846                  This maps an Ast.dec (with a given static environment) to
847                  an Absyn.dec (with a new static environment).
848                - This libraries implements certain modules that used to be
849                  structures as functors (to remove dependencies on FLINT).
850             execute.cm:
851                - Everything having to do with executing binary code objects.
852                - Dynamic environments.
853             core.cm:
854                - SML/NJ-specific instantiations of the elaborator and MLRISC.
855                - Top-level modules.
856                - FLINT (this should eventually become its own library)
857    
858    Notes:
859    
860    I am not 100% happy with the way I separated the elaborator (and its
861    data structures) from FLINT.  Two instances of the same problem:
862    
863        1. Data structures contain certain fields that carry FLINT-specific
864           information.  I hacked around this using exn and the property list
865           module from smlnj-lib.  But the fact that there are middle-end
866           specific fields around at all is a bit annoying.
867    
868        2. The elaborator calculates certain FLINT-related information.  I tried
869           to make this as abstract as I could using functorization, but, again,
870           the fact that the elaborator has to perform calculations on behalf
871           of the middle-end at all is not nice.
872    
873        3. Having to used exn and property lists is unfortunate because it
874           weakens type checking.  The other alternative (parameterizing
875           nearly *everything*) is not appealing, though.
876    
877    I removed the "rebinding =" warning hack because due to the new organization
878    it was awkward to maintain it.  As a result, the compiler now issues some of
879    these warnings when compiling init.cmi during bootstrap compilation. On
880    the plus side, you also get a warning when you do, for example:
881       val op = = Int32.+
882    which was not the case up to now.
883    
884    I placed "assign" and "deref" into the _Core structure so that the
885    code that deals with the "lazy" keyword can find them there.  This
886    removes the need for having access to the primitive environment
887    during elaboration.
888    
889    ----------------------------------------------------------------------
890    Name: Matthias Blume
891    Date: 2001/08/13
892    Tag: blume-20010813-closures
893    Description:
894    
895    This fix was sent to us by Zhong Shao.  It is supposed to improve the
896    performance of certain loops by avoiding needless closure allocation.
897    
898    ----------------------------------------------------------------------
899    Name: Lal George
900    Date: 2001/07/31 10:03:23 EDT 2001
901    Tag: george-20010731-x86-fmalloc
902    Description: Fixed bug in x86 calls
903    
904        There was a bug where call instructions would mysteriously
905        vanish. The call instruction had to be one that returned
906        a floating point value.
907    
908    ----------------------------------------------------------------------
909    Name: Lal George
910    Date: 2001/07/19 16:36:29 EDT 2001
911    Tag: george-20010719-simple-cells
912    Description:
913    
914    I have dramatically simplified the interface for CELLS in MLRISC.
915    
916    In summary, the cells interface is broken up into three parts:
917    
918      1. CellsBasis : CELLS_BASIS
919    
920            CellsBasis is a top level structure and common for all
921            architectures.  it contains the definitions of basic datatypes
922            and utility  functions over these types.
923    
924      2. functor Cells() : CELLS
925    
926            Cells generates an interface for CELLS that incorporates the
927            specific resources on the target architecture, such as the
928            presence of special register classes, their number and size,
929            and various useful substructures.
930    
931      3. <ARCH>CELLS
932    
933            e.g. SparcCells: SPARCCELLS
934    
935            <ARCH>CELLS usually contains additional bindings for special
936            registers  on the architecture, such as:
937    
938                    val r0 : cell           (* register zero *)
939                    val y : cell            (* Y register *)
940                    val psr : cell          (* processor status register *)
941                    ...
942    
943            The structure returned by applying the Cells functor is opened
944            in this interface.
945    
946    The main implication of all this is that the datatypes for cells is
947    split between CellsBasis and CELLS -- a fairly simple change for user
948    code.
949    
950    In the old scheme the CELLS interface had a definitional binding of
951    the form:
952    
953            signature CELLS = sig
954    
955               structure CellsBasis = CellsBasis
956    
957               ...
958    
959            end
960    
961    With all the sharing constraints that goes on in MLRISC, this old
962    design  quickly leads to errors such as:
963    
964            "structure definition spec inside of sharing ... "
965    
966    
967    and appears to require an unacceptable amount of sharing and where
968    constraint hackery.
969    
970    I think this error message (the interaction of definitional specs and
971    sharing) requires more explanation on our web page.
972    
973    ----------------------------------------------------------------------
974    Name: Matthias Blume
975    Date: 2001/07/19 15:00:00 EDT
976    Tag: blume-20010719-libreorg
977    Description:
978    
979    This update puts together a fairly extensive but straightforward change
980    to the way the libraries that implement the interactive system are
981    organized:
982    
983       The biggest change is the elimination of structure Compiler.  As a
984       replacement for this structure, there is now a CM library
985       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
986       that exports all the substructures of the original structure Compiler
987       directly.  So instead of saying Compiler.Foo.bar one now simply
988       says Foo.bar.  (The CM libraries actually export a collection of
989       structures that is richer than the collection of substructures of
990       structure Compiler.)
991    
992       To make the transition smooth, there is a separate library called
993       $smlnj/compiler/compiler.cm which puts together and exports the
994       original structure Compiler (or at least something very close to it).
995    
996       There are five members of the original structure Compiler
997       that are not exported directly but which instead became members
998       of a new structure Backend (described by signature BACKEND).  These are:
999       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1000       Interact (: INTERACT), structure Machine (: MACHINE), and val
1001       architecture (: string).
1002    
1003       Structure Compiler.Version has become structure CompilerVersion.
1004    
1005       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1006       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1007       or x86, respectively.
1008       Each of these exports the same frontend structures that
1009       $smlnj/compiler.cm exports.  But they do not have a structure Backend
1010       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1011       Hppa, PPC, Sparc, or X86, respectively.
1012    
1013       Library $smlnj/compiler/all.cm exports the union of the exports of
1014       $smlnj/compiler/<arch>.cm
1015    
1016       There are no structures <Arch>Compiler anymore, use
1017       $smlnj/compiler/<arch>.cm instead.
1018    
1019       Library host-compiler-0.cm is gone.  Instead, the internal library
1020       that instantiates CM is now called cm0.cm.  Selection of the host
1021       compiler (backend) is no longer done here but. (Responsibility for it
1022       now lies with $smlnj/compiler/current.cm.  This seems to be more
1023       logical.)
1024    
1025       Many individual files have been moved or renamed.  Some files have
1026       been split into multiple files, and some "dead" files have been deleted.
1027    
1028    Aside from these changes to library organization, there are also changes
1029    to the way the code itself is organized:
1030    
1031       Structure Binfile has been re-implemented in such a way that it no
1032       longer needs any knowledge of the compiler.  It exclusively deals
1033       with the details of binfile layout.  It no longer invokes the
1034       compiler (for the purpose of creating new prospective binfile
1035       content), and it no longer has any knowledge of how to interpret
1036       pickles.
1037    
1038       Structure Compile (: COMPILE) has been stripped down to the bare
1039       essentials of compilation.  It no longer deals with linking/execution.
1040       The interface has been cleaned up considerably.
1041    
1042       Utility routines for dealing with linking and execution have been
1043       moved into their own substructures.
1044    
1045       (The ultimate goal of these changes is to provide a light-weight
1046       binfile loader/linker (at least for, e.g., stable libraries) that
1047       does not require CM or the compiler to be present.)
1048    
1049    CM documentation has been updated to reflect the changes to library
1050    organization.
1051    
1052    ----------------------------------------------------------------------
1053    Name: Matthias Blume
1054    Date: 2001/07/10 17:30:00 EDT
1055    Tag: Release_110_34
1056    Description:
1057    
1058    Minor tweak to 110.34 (re-tagged):
1059    
1060      - README.html file added to CVS repository
1061      - runtime compiles properly under FreeBSD 3.X and 4.X
1062    
1063    ----------------------------------------------------------------------
1064    Name: Matthias Blume
1065    Date: 2001/07/10 17:30:00 EDT
1066    Tag: Release_110_34
1067    Description:
1068    
1069    New version number (110.34). New bootfiles.
1070    
1071    ----------------------------------------------------------------------
1072    Name: Matthias Blume
1073    Date: 2001/07/09 16:00:00 EDT
1074    Tag: blume-20010709-more-varargs
1075    Description:
1076    
1077    I changed the handling of varargs in ml-nlffigen again:
1078    The ellipsis ... will now simply be ignored (with an accompanying warning).
1079    
1080    The immediate effect is that you can actually call a varargs function
1081    from ML -- but you can't actually supply any arguments beyond the ones
1082    specified explicitly.  (For example, you can call printf with its format
1083    string, but you cannot pass additional arguments.)
1084    
1085    This behavior is only marginally more useful than the one before, but
1086    it has the advantage that a function or, more importantly, a function
1087    type never gets dropped on the floor, thus avoiding follow-up problems with
1088    other types that refer to the offending one.
1089    
1090    ----------------------------------------------------------------------
1091    Name: Matthias Blume
1092    Date: 2001/07/09 11:25:00 EDT
1093    Tag: blume-20010709-varargs
1094    Description:
1095    
1096    1. ckit-lib.cm now exports structure Error
1097    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1098       with a warning accompanied by a source location.  Moreover, it
1099       merely skips the offending function or type and proceeds with the
1100       rest of its work.u  As a result, one can safely feed C code containing
1101       "..." to ml-nlffigen.
1102    3. There are some internal improvements to CM, providing slightly
1103       more general string substitutions in the tools subsystem.
1104    
1105    ----------------------------------------------------------------------
1106    Name: Matthias Blume
1107    Date: 2001/06/27 15:10:00 EDT
1108    Tag: blume-20010627-concur
1109    Description:
1110    
1111    Fixed a small bug in CM's handling of parallel compilation.
1112    (You could observe the bug by Control-C-interrupting an ordinary
1113    CMB.make or CM.stabilize and then attaching some compile servers.
1114    The result was that all of a sudden the previously interrupted
1115    compilation would continue on its own.  This was because of
1116    an over-optimization: CM did not bother to clean out certain queues
1117    when no servers were attached "anyway", resulting in the contents
1118    of these queues to grab control when new servers did get attached.)
1119    
1120    There is also another minor update to the CM manual.
1121    
1122    ----------------------------------------------------------------------
1123    Name: Matthias Blume
1124    Date: 2001/06/26 16:15:00 EDT
1125    Tag: blume-20010626-cmdoc
1126    Description:
1127    
1128    Minor typo fixed in CM manual (syntax diagram for libraries).
1129    
1130    ----------------------------------------------------------------------
1131    Name: Matthias Blume
1132    Date: 2001/06/25 22:55:00 EDT
1133    Tag: blume-20010625-x86pc
1134    Description:
1135    
1136    Fixed a nasty bug in the X86 assembly code that caused signal
1137    handlers to fail (crash) randomly.
1138    
1139    ----------------------------------------------------------------------
1140    Name: Matthias Blume
1141    Date: 2001/06/25 12:05:00 EDT
1142    Tag: blume-20010625-nlffigen
1143    Description:
1144    
1145    This update fixes a number of minor bugs in ml-nlffigen as reported by
1146    Nick Carter <nbc@andrew.cmu.edu>.
1147    
1148      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1149      2. Default names for generated files are now derived from the name of
1150         the C file *without its directory*.  In particular, this causes generated
1151         files to be placed locally even if the C file is in some system directory.
1152      3. Default names for generated signatures and structures are also derived
1153         from the C file name without its directory.  This avoids silly things
1154         like "structure GL/GL".
1155         (Other silly names are still possible because ml-nlffigen does not do
1156          a thorough check of whether generated names are legal ML identifiers.
1157          When in doubt, use command line arguments to force particular names.)
1158    
1159    ----------------------------------------------------------------------
1160    Name: Matthias Blume
1161    Date: 2001/06/21 12:25:00 EDT
1162    Tag: blume-20010621-eXene
1163    Description:
1164    
1165    eXene now compiles and (sort of) works again.
1166    
1167    The library name (for version > 110.33) is $/eXene.cm.
1168    
1169    I also added an new example in src/eXene/examples/nbody.  See the
1170    README file there for details.
1171    
1172    ----------------------------------------------------------------------
1173    Name: Matthias Blume
1174    Date: 2001/06/20 16:40:00 EDT
1175    Tag: blume-20010620-cml
1176    Description:
1177    
1178    CML now compiles and works again.
1179    
1180    Libraries (for version > 110.33):
1181    
1182      $cml/cml.cm            Main CML library.
1183      $cml/basis.cm          CML's version of $/basis.cm.
1184      $cml/cml-internal.cm   Internal helper library.
1185      $cml/core-cml.cm       Internal helper library.
1186      $cml-lib/trace-cml.cm  Tracing facility.
1187      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1188    
1189    The installer (config/install.sh) has been taught how to properly
1190    install this stuff.
1191    
1192    ----------------------------------------------------------------------
1193    Name: Matthias Blume
1194    Date: 2001/06/19 17:55:00 EDT
1195    Tag: blume-20010619-instantiate
1196    Description:
1197    
1198    This un-breaks the fix for bug 1432.
1199    (The bug was originally fixed in 110.9 but I broke it again some
1200    time after that.)
1201    
1202    ----------------------------------------------------------------------
1203    Name: Matthias Blume
1204    Date: 2001/06/19 17:25:00 EDT
1205    Tag: blume-20010619-signals
1206    Description:
1207    
1208    This should (hopefully) fix the long-standing signal handling bug.
1209    (The runtime system was constructing a continuation record with an
1210    incorrect descriptor which would cause the GC to drop data on the floor...)
1211    
1212    ----------------------------------------------------------------------
1213    Name: Matthias Blume
1214    Date: 2001/06/15 15:05:00 EDT
1215    Tag: blume-20010615-moresparc
1216    Description:
1217    
1218    Here is a short late-hour update related to Sparc c-calls:
1219    
1220     -- made handling of double-word arguments a bit smarter
1221    
1222     -- instruction selection phase tries to collapse certain clumsily
1223        constructed ML-Trees; typical example:
1224    
1225            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1226    
1227        This currently has no further impact on SML/NJ since mlriscGen does
1228        not seem to generate such patterns in the first place, and c-calls
1229        (which did generate them in the beginning) has meanwhile been fixed
1230        so as to avoid them as well.
1231    
1232    ----------------------------------------------------------------------
1233    Name: Matthias Blume
1234    Date: 2001/06/15 15:05:00 EDT
1235    Tag: blume-20010615-sparc
1236    Description:
1237    
1238    The purpose of this update is to provide an implementation of NLFFI
1239    on Sparc machines.
1240    
1241    Here are the changes in detail:
1242    
1243       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1244       the Sparc implementation of the c-calls API.
1245       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1246       for accessing the ML frame.  Thus, we have a real frame pointer and
1247       can freely modify %sp without need for an omit-frame-ptr phase.
1248       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1249       this case.
1250       * ml-nlffigen has been taught to produce code for different architectures
1251       and calling conventions.
1252       * In a way similar to what was done in the x86 case, the Sparc
1253       backend uses its own specific extension to mltree.  (For example,
1254       it needs to be able to generate UNIMP instructions which are part
1255       of the calling convention.)
1256       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1257       to make it easier to plug in new machine- and os-dependent parts).
1258    
1259    There are some other fairly unrelated bug fixes and cleanups as well:
1260    
1261       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1262       that they properly share their libraries with existing SML/NJ libraries.
1263       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1264       follow-up error messages.
1265       * Updates to CM/CMB documentation.
1266    
1267    TODO items:
1268    
1269       * MLRISC should use a different register as its asmTemp on the Sparc.
1270         (The current %o2 is a really bad choice because it is part of the
1271         calling conventions, so things might interfere in unexpected ways.)
1272    
1273    ----------------------------------------------------------------------
1274    Name: Matthias Blume
1275    Date: 2001/06/07
1276    Tag: blume-20010607-calls
1277    Description:
1278    
1279    A number of internal changes related to C calls and calling conventions:
1280    
1281    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1282       number of bytes popped implicitly (by the callee).  In most cases
1283       this field is 0 but on x86/win32 it is some non-zero value.  This
1284       is information provided for the benefit of the "omit-frameptr" pass.
1285    2. The CALL instruction on the x86 carries a similar "pops" field.
1286       The instruction selection phase copies its value from the ML-Tree
1287       CALL statement.
1288    3. On all other architectures, the instruction selection phase checks
1289       whether "pops=0" and complains if not.
1290    4. The c-calls implementation for x86 now accepts two calling conventions:
1291       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1292       up after the call and pops is set to 0.  For "stdcall", the caller
1293       does nothing, leaving the cleanup to the callee; pops is set to
1294       the number of bytes that were pushed onto the stack.
1295    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1296       distinguish between "ccall" and "stdcall".
1297    6. The UNIMP instruction has been added to the supported Sparc instruction
1298       set. (This is needed for implementing the official C calling convention
1299       on this architecture.)
1300    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1301       work with the latest CM.
1302    
1303    ----------------------------------------------------------------------
1304    Name: Matthias Blume
1305    Date: 2001/06/05 15:10:00 EDT
1306    Tag: blume-20010605-cm-index
1307    Description:
1308    
1309    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1310    
1311    1. CM can now generate "index files".  These are human-readable files
1312       that list on a per-.cm-file basis each toplevel symbol defined or
1313       imported.  The location of the index file for
1314       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1315       To enable index-file generation, set CM.Control.generate_index to true
1316       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1317    
1318       The CM manual has been updated accordingly.
1319    
1320    2. I made some slight modifications to the c-calls API in MLRISC.
1321    
1322         a) There is now a callback to support saving/restoring of
1323            dedicated but caller-save registers around the actual call
1324            instruction.
1325         b) One can optionally specify a comment-annotation for the
1326            call instruction.
1327    
1328    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1329       (For example, the comment annotation shows the C prototype of
1330        the function being called.)
1331    
1332    ----------------------------------------------------------------------
1333    Name: Matthias Blume
1334    Date: 2001/06/01 13:30:00 EDT
1335    Tag: blume-20010601-nlffi-cleanup
1336    Description:
1337    
1338    This is mostly a cleanup of MLFFI stuff:
1339    
1340       - some signature files have been put into a more exposed place
1341       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1342       - ml-nlffigen changed accordingly
1343       - tutorial updated
1344    
1345    Other changes:
1346    
1347       - author's affiliation in CM manual(s) updated
1348       - some more recognized keywords added to Allen's sml.sty
1349    
1350    ----------------------------------------------------------------------
1351    Name: Matthias Blume
1352    Date: 2001/05/25 15:30:00 EDT
1353    Tag: blume-20010525-iptr
1354    Description:
1355    
1356      - put the official 110.33-README (as it appears on the ftp server) under
1357        CVS
1358      - fixed a small bug related to incomplete pointer types in
1359        ml-nlffigen
1360      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1361        (it does not need the 'f type parameter)
1362    
1363    ----------------------------------------------------------------------
1364    Name: Matthias Blume
1365    Date: 2001/05/23 14:30:00 EDT
1366    Tag: Release_110_33
1367    Description:
1368    
1369    New version number (110.33).  New bootfiles.
1370    
1371    ----------------------------------------------------------------------
1372    Name: Matthias Blume
1373    Date: 2001/05/22 18:06:00 EDT
1374    Tag: blume-20010522-targets
1375    Description:
1376    
1377    Made install.sh use file config/targets.customized if it exists, falling
1378    back to config/targets if it doesn't.  This way one can have a customized
1379    version of the targets file without touching the "real thing", thus
1380    eliminating the constant fear of accidentally checking something bogus
1381    back into the CVS repository...  (File config/targets.customized must
1382    not be added to the repository!)
1383    
1384    ----------------------------------------------------------------------
1385    Name: Matthias Blume
1386    Date: 2001/05/22 16:30:00 EDT
1387    Tag: blume-20010522-minitut
1388    Description:
1389    
1390    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1391       struct returns.
1392    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1393       incomplete, preliminary documentation for NLFFI.
1394    
1395    ----------------------------------------------------------------------
1396    Name: Matthias Blume
1397    Date: 2001/05/14 11:30:00 EDT
1398    Tag: blume-20010514-script
1399    Description:
1400    
1401    Some bugs in install script fixed.
1402    
1403    In addition to that I also made a slight change to the NLFFI API:
1404    Functors generated by ml-nlffigen now take the dynamic library as a
1405    straight functor argument, not as a suspended one.  (The original
1406    functor code used to force the suspension right away anyway, so there
1407    was nothing gained by this complication of the interface.)
1408    
1409    ----------------------------------------------------------------------
1410    Name: Matthias Blume
1411    Date: 2001/05/11 14:35:00 EDT
1412    Tag: blume-20010511-ml-nlffi
1413    Description:
1414    
1415    I finally took the plunge and added my new FFI code to the main
1416    repository.  For x86-linux it is now ready for prime-time.
1417    
1418    There are two new subdirectories of "src":
1419    
1420      - ml-nlffi-lib:
1421           The utility library for programs using the FFI interface.
1422           Here is the implementation of $/c.cm and its associated low-level
1423           partners $/c-int.cm and $/memory.cm.
1424      - ml-nlffigen:
1425           A stand-alone program for generating ML glue code from C source
1426           code.
1427    
1428    Building ml-nlffigen requires $/ckit-lib.cm.
1429    
1430    The config/install.sh script has been updates to do the Right Thing
1431    (hopefully).
1432    
1433    Notice that the source tree for the C-Kit will not be put under "src"
1434    but directly under the installation root directory.  (This is the
1435    structure that currently exists on the CVS server when you check out
1436    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1437    
1438    Bugs: No documentation yet.
1439    
1440    ----------------------------------------------------------------------
1441    Name: Matthias Blume
1442    Date: 2001/05/09 16:35:00 EDT
1443    Tag: blume-20010509-cpscontract
1444    Description:
1445    
1446    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1447    wrapper/unwrapper elimination did not decrement usage counts and some
1448    dead variables got overlooked by the dead-up logic.)
1449    
1450    ----------------------------------------------------------------------
1451    Name: Lal George
1452    Date: 2001/05/08  17:26:09 EDT
1453    Tag: george-20010508-omit-frameptr
1454    Description:
1455    
1456    Changes to implement the omit-frame-pointer optimization to support
1457    raw C calls. For now, there is only support on the Intel x86, but
1458    other architectures will follow as more experience is gained with this.
1459    
1460    
1461    ----------------------------------------------------------------------
1462    Name: Matthias Blume
1463    Date: 2001/05/07 14:40:00 EDT
1464    Tag: blume-20010507-proxies
1465    Description:
1466    
1467    I made into "proxy libraries" all libraries that qualify for such a
1468    change.  (A qualifying library is a library that has another library or
1469    groups as its sole member and repeats that member's export list
1470    verbatim.  A proxy library avoids this repetition by omitting its export
1471    list, effectively inheriting the list that its (only) member exports.
1472    See the CM manual for more explanation.)
1473    The main effect is that explicit export lists for these libraries
1474    do not have to be kepts in sync, making maintenance a bit easier.
1475    
1476    I also added copyright notices to many .cm-files.
1477    
1478    Last but not least, I made a new set of bootfiles.
1479    
1480    ----------------------------------------------------------------------
1481    Name: Matthias Blume
1482    Date: 2001/05/04 17:00:00 EDT
1483    Tag: blume-20010504-cm-lsplit
1484    Description:
1485    
1486    0. John merged pending changes to $/smlnj-lib.cm
1487    
1488    1. Allen's previous change accidentally backed out of one of Lal's
1489       earlier changes.  I undid this mistake (re-introducing Lal's change).
1490    
1491    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1492       within the compiler where applicable.  There is some code simplification
1493       because of that.
1494    
1495    3. The "split" phase (in FLINT) is now part of the default list of phases.
1496       Compiler.Control.LambdaSplitting.* can be used to globally control the
1497       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1498       it can now also be controlled on a per-source basis: CM has been taught
1499       a new tool parameter applicable to ML source files.
1500    
1501       - To turn lambda-splitting off completely:
1502            local open Compiler.Control.LambdaSplitting in
1503                val _ = set Off
1504            end
1505       - To make "no lambda-splitting" the global default (but allow per-source
1506         overriding); this is the initial setting:
1507            local open Compiler.Control.LambdaSplitting in
1508                val _ = set (Default NONE)
1509            end
1510       - To make "lambda-splitting with aggressiveness a" the global default
1511         (and allow per-source overriding):
1512            local open Compiler.Control.LambdaSplitting in
1513                val _ = set (Default (SOME a))
1514            end
1515    
1516       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1517         write (in the respective .cm-file):
1518            a.sml (lambdasplitting:off)
1519       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1520            a.sml (lambdasplitting:on)
1521       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1522         <a> is a decimal non-negative integer):
1523            a.sml (lambdasplitting:<a>)
1524       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1525            a.sml (lambdasplitting:infinity)
1526       - To use the global default for a.sml:
1527            a.sml (lambdasplitting:default)
1528         or simply
1529            a.sml
1530    
1531    ----------------------------------------------------------------------
1532    Name: Allen Leung
1533    Date: 2001/05/04 01:57:00 EDT
1534    Tag: leunga-20010504-sync
1535    Description:
1536    
1537      MLRISC features.
1538    
1539      1. Fix to CMPXCHG instructions.
1540      2. Changed RA interface to allow annotations in callbacks.
1541      3. Added a new method to the stream interface to allow annotations updates.
1542    
1543    ----------------------------------------------------------------------
1544    Name: Matthias Blume
1545    Date: 2001/05/01 11:45:00 EDT
1546    Tag: blume-20010501-pcedittmp
1547    Description:
1548    
1549    Changed install.sh to use the current working directory instead of
1550    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1551    of /usr/tmp caused trouble with MacOS X because of file premission
1552    problems.
1553    
1554    ----------------------------------------------------------------------
1555    Name: Matthias Blume
1556    Date: 2001/04/20 11:10:00 EDT
1557    Tag: blume-20010420-inMLflag
1558    Description:
1559    
1560     - added vp_limitPtrMask to vproc-state.h
1561       (for use by the raw-C-calls mechanism to implement proper interrupt
1562        handling)
1563     - made the ML compiler aware of various data-structure offsets so it
1564       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1565     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1566       raw C-calls
1567    
1568    ----------------------------------------------------------------------
1569    Name: Lal George
1570    Date: 2001/04/20 09:15:28 EDT
1571    Tag: george-20010420-macosX
1572    Description:
1573    
1574     - Changes to port to Mac OS X; Darwin.
1575    
1576     - In the process I found that sqrt was broken on the PPC, because the
1577       fsqrt instruction is not implemented.
1578    
1579    ----------------------------------------------------------------------
1580    Name: Matthias Blume
1581    Date: 2001/04/18 12:45:00 EDT
1582    Tag: blume-20010418-ccalls
1583    Description:
1584    
1585     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1586       (this bug prevented structure arguments containing pointers from being
1587        passed correctly)
1588     - changed the raw-C-call code in mlriscGen.sml in such a way that
1589       structure arguments are represented as a pointer to the beginning
1590       of the structure (instead of having a series of synthesized arguments,
1591       one for each structure member)
1592    
1593     - made makeml script's verbosity level configurable via environment
1594       variable (MAKEML_VERBOSITY)
1595    
1596     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1597       in rawmem-x86.sml; we are now using the real thing
1598    
1599    ----------------------------------------------------------------------
1600    Name: Matthias Blume
1601    Date: 2001/03/22 16:25:00 EST
1602    Tag: blume-20010322-bootfiles
1603    Description:
1604    
1605    Created a new set of bootfiles (for your automatic installation convenience).
1606    
1607    ----------------------------------------------------------------------
1608    Name: Matthias Blume
1609    Date: 2001/03/22 15:10:00 EST
1610    Tag: blume-20010322-rawmem-parcm
1611    Description:
1612    
1613    1. All "raw memory access" primitives for the new FFI are implemented now
1614       (at least on the x86).
1615    2. Some further cleanup of CM's parallel make mechanism.
1616    
1617    ----------------------------------------------------------------------
1618    Name: Matthias Blume
1619    Date: 2001/03/19 17:53:00 EST
1620    Tag: blume-20010319-parallel
1621    Description:
1622    
1623    Parallel make (using compile servers) now works again.
1624    
1625    To this end, CM.stabilize and CMB.make have been modified to work in
1626    two passes when compile servers are attached:
1627       1. Compile everything, do not perform stabilization; this pass
1628          uses compile servers
1629       2. Stabilize everything; this pass does not use compile servers
1630    If there are no compile servers, the two passes are combined into one
1631    (as before).  Splitting the passes increases the inherent parallelism
1632    in the dependency graph because the entire graph including all
1633    libraries is available at the same time.  This, in turn, improves
1634    server utilization.  The downside is that the master process will
1635    have to do some extra work after compilation is done (because for
1636    technical reasons it must re-read all the binfiles during stabilization).
1637    
1638    ----------------------------------------------------------------------
1639    Name: Matthias Blume
1640    Date: 2001/03/16 12:22:00 EST
1641    Tag: blume-20010316-bootfiles
1642    Description:
1643    
1644    Created a new set of bootfiles (for your automatic installation convenience).
1645    
1646    ----------------------------------------------------------------------
1647    Name: Matthias Blume
1648    Date: 2001/03/16 11:00:00 EST
1649    Tag: blume-20010316-MLTREE-fixup
1650    Description:
1651    
1652    This is a minor fixup for an (untagged) earlier commit by Allen.
1653    (A file was missing).
1654    
1655    ----------------------------------------------------------------------
1656    Name: Allen Leung
1657    Date: Mon Mar  5 18:54:57 EST 2001
1658    Tag: leunga-20010305-cut-support
1659    
1660    1. New support for alternative control-flow in MLTREE.
1661       Currently we support
1662    
1663          FLOW_TO(CALL ...., [k1,...,kn])
1664    
1665       This is needed for 'cuts to' in C-- and try/handle-like constructs
1666       in Moby
1667    
1668       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1669    
1670    2. Register Allocator
1671    
1672       Changes in interface [from Fermin, John]
1673    
1674    3. Alpha 8-bit SLL support [Fermin]
1675    
1676    4. All architectures
1677    
1678       A new module (ClusterExpandCopies) for expanding parallel copies.
1679    
1680    ----------------------------------------------------------------------
1681    Name: Allen Leung
1682    Date: 2001/02/27 23:07:00 EST
1683    Tag: leunga-20010227-minor-stuff
1684    
1685    1. Alpha bug fix for CMOVNE
1686    2. Handle mltree COND(..,FCMP ...,...)
1687    3. Bug fix in simplifier
1688    
1689    ----------------------------------------------------------------------
1690    Name: Matthias Blume
1691    Date: 2001/01/30 17:50:00 EST
1692    Tag: blume-20010130-sync
1693    Description:
1694    
1695    This is just a minor update to sync my devel branch with the main brach.
1696    The only visible change is the addition of some README files.
1697    
1698    ----------------------------------------------------------------------
1699    Name: Matthias Blume
1700    Date: 2001/01/12 23:30:00 JST
1701    Tag: blume-20010112-bootfiles
1702    Description:
1703    
1704    Made a new set of bootfiles that goes with the current state of the
1705    repository.
1706    
1707    ----------------------------------------------------------------------
1708    Name: Matthias Blume
1709    Date: 2001/01/12 21:20:00 JST
1710    Tag: blume-20010112-sync
1711    Description:
1712    
1713    I am just flushing out some minor changes that had accumulated in
1714    my private branch in order to sync with the main tree.  (This is
1715    mainly because I had CVS trouble when trying to merge _into_ my
1716    private branch.)
1717    
1718    Most people should be completely unaffected by this.
1719    
1720    ----------------------------------------------------------------------
1721    Name: Allen Leung
1722    Date: Thu Jan 11 21:03:00 EST 2001
1723    Tag: leunga-20010111-labexp=mltree
1724    Description:
1725    
1726    1.  Removed the type LabelExp and replace it by MLTree.
1727    2.  Rewritten mltree-simplify with the pattern matcher tool.
1728    3.  There were some bugs in alpha code generator which would break
1729        64-bit code generation.
1730    4.  Redo the tools to generate code with the
1731    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1732        are now generated by perl scripts.
1733    
1734    ----------------------------------------------------------------------
1735    Name: Matthias Blume
1736    Date: 2001/01/10 21:55:00 JST
1737    Tag: blume-20010110-rcc
1738    Description:
1739    
1740    The RCC stuff now seems to work (but only on the x86).
1741    This required hacking of the c-calls interface (and -implementation) in
1742    MLRISC.
1743    
1744    Normal compiler users should be unaffected.
1745    
1746    ----------------------------------------------------------------------
1747    Name: Matthias Blume
1748    Date: 2001/01/09 01:20:00 JST
1749    Tag: blume-20010109-rcc
1750    Description:
1751    
1752    This is a fairly big patch, flushing out a large number of pending
1753    changes that I made to my development copy over the last couple of days.
1754    
1755    Of practical relevance at this moment is a workaround for a pickling
1756    bug that Allen ran into the other day.  The cause of the bug itself is
1757    still unknown and it might be hard to fix it properly, but the
1758    workaround has some merits of its own (namely somewhat reducing pickling
1759    overhead for certain libraries).  Therefore, I think this solution should
1760    be satisfactory at this time.
1761    
1762    The rest of the changes (i.e., the vast majority) has to do with my
1763    ongoing efforts of providing direct support for C function calls from
1764    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1765    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1766    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1767    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1768    handle RCC.
1769    
1770    The last part (the changes to mlriscGen.sml) are still known to be
1771    wrong on the x86 and not implemented on all other architectures.  But
1772    the infrastructure is in place. I had to change a few functor
1773    signatures in the backend to be able to route the CCalls interface
1774    from MLRISC there, and I had to specialize the mltree type (on the
1775    x86) to include the necessary extensions. (The extensions themselves
1776    were already there and redy to go in MLRISC/x86).
1777    
1778    Everything should be very happy as soon as someone helps me with
1779    mlriscGen.sml...
1780    
1781    In any case, nothing of this should matter to anyone as long as the
1782    new primop is not being used (which is going to be the case unless you
1783    find it where I hid it :). The rest of the compiler is completely
1784    unaffected.
1785    
1786    ----------------------------------------------------------------------
1787    Name: Matthias Blume
1788    Date: 2001/01/05 00:30:00 JST
1789    Tag: blume-20010105-primops
1790    Description:
1791    
1792    Added some experimental support for work that I am doing right now.
1793    These changes mostly concern added primops, but there is also a new
1794    experimental C library in the runtime system (but currently not enabled
1795    anywhere except on Linux/X86).
1796    
1797    In the course of adding primops (and playing with them), I discovered that
1798    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1799    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1800    To recover, I made type information in INL_PRIM mandatory and changed
1801    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1802    has complete, correct type information (i.e., no bottom types).
1803    
1804    Since all these changes mean that we need new binfiles, I also bumped the
1805    version number to 110.32.1.
1806    
1807    ----------------------------------------------------------------------
1808    Name: Matthias Blume
1809    Date: 2000/12/30 22:10:00 JST
1810    Tag: blume-20001230-various
1811    Description:
1812    
1813    Added proxy libraries for MLRISC and let MLRISC libraries refer
1814    to each other using path anchors.  (See CM manual for explanation.)
1815    
1816    Updated CM documentation.
1817    
1818    Fixed some bugs in CM.
1819    
1820    Implemented "proxy" libraries (= syntactic sugar for CM).
1821    
1822    Added "-quiet" option to makeml and changed runtime system accordingly.
1823    
1824    Added cleanup handler for exportML to reset timers and compiler stats.
1825    
1826    ----------------------------------------------------------------------
1827    Name: Lal George
1828    Date: 2000/12/22 22:22:58 EST 2000
1829    Tag: Release_110_32
1830    Description:
1831    
1832            Infinite precision used throughout MLRISC.
1833            see MLRISC/mltree/machine-int.sig
1834    
1835    ----------------------------------------------------------------------
1836    Name: Matthias Blume
1837    Date: 2000/12/22 23:16:00 JST
1838    Tag: blume-20001222-warn
1839    Description:
1840    
1841    Corrected wording and formatting of some CM warning message which I
1842    broke in my previous patch.
1843    
1844    ----------------------------------------------------------------------
1845    Name: Matthias Blume
1846    Date: 2000/12/22 21:20:00 JST
1847    Tag: blume-20001222-anchorenv
1848    Description:
1849    
1850    Fixed CM's handling of anchor environments in connection with CMB.make.
1851    
1852    ----------------------------------------------------------------------
1853    Name: Matthias Blume
1854    Date: 2000/12/22 13:15:00 JST
1855    Tag: blume-20001222-cleanup
1856    Description:
1857    
1858    Removed src/cm/ffi which does not (and did not) belong here.
1859    
1860    ----------------------------------------------------------------------
1861    Name: Matthias Blume
1862    Date: 2000/12/21 23:55:00 JST
1863    Tag: blume-20001221-exn
1864    Description:
1865    
1866    Probably most important: CM no longer silently swallows all exceptions
1867    in the compiler.
1868    Plus: some other minor CM changes.  For example, CM now reports some
1869    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1870    
1871    ----------------------------------------------------------------------
1872    Name: Matthias Blume
1873    Date: 2000/12/15 00:01:05 JST
1874    Tag: blume-20001215-dirtool
1875    Description:
1876    
1877    - "dir" tool added.
1878    - improvements and cleanup to Tools structure
1879    - documentation updates
1880    
1881    ----------------------------------------------------------------------
1882    Name: Allen Leung
1883    Date: Thu Dec 14 03:45:24 EST 2000
1884    Description:
1885    Tag:  leunga-20001214-int-inf
1886    Description:
1887    
1888       In IntInf, added these standard functions, which are missing from our
1889    implementation:
1890    
1891        andb : int * int -> int
1892        xorb : int * int -> int
1893        orb  : int * int -> int
1894        notb : int -> int
1895         <<   : int * word -> int
1896        ~>>  : int * word -> int
1897    
1898       Not tested, I hope they are correct.
1899    
1900    ----------------------------------------------------------------------
1901    Name: Allen Leung
1902    Date: Fri Dec  8 19:23:26 EST 2000
1903    Description:
1904    Tag:  leunga-20001208-nowhere
1905    Description:
1906    
1907      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1908    to generate better error messages etc.  Plus a brief manual.
1909    
1910    ----------------------------------------------------------------------
1911    Name: Lal George
1912    Date: 2000/12/08 09:54:02 EST 2000
1913    Tag: Release_110_31
1914    Description:
1915    
1916    - Version 110.31
1917    ----------------------------------------------------------------------
1918    Name: Allen Leung
1919    Date: Thu Dec  7 22:01:04 EST 2000
1920    Tag:  leunga-20001207-cell-monster-hack
1921    Description:
1922    
1923    Major MLRISC internal changes.  Affect all clients.
1924    Summary:
1925    
1926    1.  Type CELLS.cell = int is now replaced by a datatype.
1927        As a result, the old regmap is now gone.  Almost all interfaces
1928        in MLRISC change as a consequence.
1929    
1930    2.  A new brand version of machine description tool (v3.0) that generates
1931        modules expecting the new interface.  The old version is removed.
1932    
1933    3.  The RA interface has been further abstracted into two new functors.
1934        RISC_RA and X86RA.  These functors have much simpler interfaces.
1935        [See also directory MLRISC/demo.]
1936    
1937    4.  Some other new source->source code generation tools are available:
1938    
1939        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1940        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1941           I use this tool to generate the peephole optimizers---with the new
1942           cell type changes, peephole rules are becoming difficult to write
1943           without conditional pattern matching.
1944    
1945    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1946        cover the entire MLRISC source tree so many things broke.
1947    
1948    6.  CM files have been moved to the subdirectory MLRISC/cm.
1949        They are moved because there are a lot of them and they clutter up the
1950        root dir.
1951    
1952    7.  More detailed documentation to come...
1953    
1954        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1955        a makeml -rebuild first.  This is because of other other
1956        changes that Matthias has made (see below).
1957    
1958    
1959    ----------------------------------------------------------------------
1960    Name: Matthias Blume
1961    Date: 2000/11/30 23:12:00 JST
1962    Tag: blume-20001130-filereorg
1963    Description:
1964    
1965    Some manual updates and some file reorganizations in CM.
1966    
1967    ----------------------------------------------------------------------
1968    Name: Matthias Blume
1969    Date: 2000/11/24 17:45:00 JST
1970    Tag: blume-20001124-link
1971    Description:
1972    
1973    Drastically improved link traversal code for the case that the dynamic
1974    value was already loaded at bootstrap time.  As a result, CM and CMB
1975    now both load blazingly fast -- even on a very slow machine.  Also,
1976    memory consumption has been further reduced by this.
1977    
1978    Warning: The format of the PIDMAP file has changed.  THerefore, to
1979    bootstrap you have to do this:
1980    
1981    1. Run CMB.make
1982    2. Make a symbolic link for the boot directory:
1983         ln -s sml.boot.ARCH-OS xxx
1984    3. "Rebuild" the boot directory:
1985         ./makeml -boot xxx -rebuild sml ; rm xxx
1986    4. Boot normally:
1987          ./makeml
1988    
1989    ----------------------------------------------------------------------
1990    Name: Matthias Blume
1991    Date: 2000/11/21 21:20:00 JST
1992    Tag: blume-20001121-tools
1993    Description:
1994    
1995    Continued hacking on autoloading problem -- with success this time.
1996    Also changed tool-plugin mechanism.  See new CM manual.
1997    
1998    ----------------------------------------------------------------------
1999    Name: Matthias Blume
2000    Date: 2000/11/19 14:30:00 JST
2001    Tag:  blume-20001119-autoload
2002    Description:
2003    
2004    Some hacking to make autoloading faster.  Success for CMB, no success
2005    so far for CM.  There is a reduced structure CM' that autoloads faster.
2006    (This is a temporary, non-documented hack to be eliminated again when
2007    the general problem is solved.)
2008    
2009    ----------------------------------------------------------------------
2010    Name: Matthias Blume
2011    Date: 2000/11/17 14:10:00 JST
2012    Tag: blume-20001117-pickle-lib
2013    Description:
2014    
2015    1. Eliminated comp-lib.cm
2016    2. Made pickle-lib.cm
2017    3. Eliminated all uses of intset.sml (from comp-lib.cm)
2018    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2019       equivalent constructs from smlnj-lib.cm (INtHashTable).
2020    5. Point 4. also goes for those uses of intmap.* in MLRISC.
2021       Duplicated intmap modules thrown out.
2022    6. Hunted down all duplicated SCC code and replaced it with
2023       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2024    7. Rewrote Feedback module.
2025    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
2026       should be thrown out and equivalent modules from smlnj-lib.cm
2027       should be used (IntRedBlackSet, IntListSet, ...).
2028    
2029    Confirmed that compiler compiles to fixpoint.
2030    
2031    ----------------------------------------------------------------------
2032    Name: Allen Leung
2033    Date: 2000/11/10 18:00:00
2034    Tag: leunga-20001110-new-x86-fp
2035    
2036    A new x86 floating point code generator has been added.
2037    By default this is turned off.  To turn this on, do:
2038    
2039        CM.autoload "$smlnj/compiler.cm";
2040        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2041    
2042    Changes:
2043    
2044    1.  Changed FTAN to FPTAN so that the assembly output is correct.
2045    2.  Changed the extension callback for FTANGENT to generate:
2046    
2047              fptan
2048              fstp  %st(0)
2049        instead of
2050              fptan
2051              fstpl ftempmem
2052    
2053    3.  Numerous assembly fixes for x86.
2054    
2055    5.  Cleaned up the machine code output module x86/x86MC.sml and added
2056        support for a whole bunch of instructions and addressing modes:
2057    
2058          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
2059          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
2060          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
2061          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2062          fxch %st(n)
2063          fld %st(n)
2064          fst %st(n)
2065          fst mem
2066          fstp %st(n)
2067          fucom %st(n)
2068          fucomp %st(n)
2069    
2070        All these are now generated when the fast fp mode is turned on.
2071    
2072    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2073    
2074    ----------------------------------------------------------------------
2075    Name: Matthias Blume
2076    Date: 2000/11/09 11:20:00 JST
2077    Tag: blume-20001109-scc
2078    Description:
2079    
2080    Eliminated some code duplication:
2081    
2082    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2083       (Otherwise the functor is useless.)
2084    2. Used GraphSCCFn where SCCUtilFun was used previously.
2085    3. Got rid of SCCUtilFun (in comp-lib.cm).
2086    
2087    ----------------------------------------------------------------------
2088    Name: Lal George
2089    Date: 2000/11/06 09:02:21 EST 2000
2090    Tag: Release_110_30
2091    Description:
2092    
2093    - Version 110.30
2094    ----------------------------------------------------------------------
2095    Name: Matthias Blume
2096    Date: 2000/11/04 14:45:00
2097    Tag: blume-20001104-mlbuild
2098    Description:
2099    
2100    - Made ml-build faster on startup.
2101    - Documentation fixes.
2102    
2103    ----------------------------------------------------------------------
2104    Name: Matthias Blume
2105    Date: 2000/11/02 17:00:00 JST
2106    Tag: blume-20001102-condcomp
2107    Description:
2108    
2109    - Small tweaks to pickler -- new BOOTFILES!
2110    - Version bumped to 110.29.2.
2111    - Added conditional compilation facility to init.cmi (see comment there).
2112    ----------------------------------------------------------------------
2113    Name: Allen Leung
2114    Date: 2000/10/23 19:31:00
2115    Tag: leunga-20001023-demo-ra
2116    
2117    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2118    2. Test programs for the graph library updated
2119    3. Some new MLRISC demo programs added
2120    
2121    ----------------------------------------------------------------------
2122    Name: Matthias Blume
2123    Date: 2000/08/31 22:15:00 JST
2124    Tag: blume-20001017-errmsg
2125    Description:
2126    
2127    More error message grief: Where there used to be no messages, there
2128    now were some that had bogus error regions.  Fixed.
2129    
2130    ----------------------------------------------------------------------
2131    Name: Matthias Blume
2132    Date: 2000/08/31 17:30:00 JST
2133    Tag: blume-20001017-v110p29p1
2134    Description:
2135    
2136    I made a version 110.29.1 with new bootfiles.
2137    
2138    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2139              CM documentation changes and a small bugfix in CM's error reporting.
2140    
2141    ----------------------------------------------------------------------
2142    Name: Lal George
2143    Date: 2000/09/27 14:42:35 EDT
2144    Tag: george-20000927-nodestatus
2145    Description:
2146    
2147    Changed the type of the nodestatus, so that:
2148    
2149            SPILLED(~1)             is now SPILLED
2150            SPILLED(m) where m>=0   is now MEMREG(m)
2151            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2152    
2153    ----------------------------------------------------------------------
2154    Name: Matthias Blume
2155    Date: 2000/09/07 14:45:00 JST
2156    Tag: blume-20000907-cmerrmsg
2157    Description:
2158    
2159    Small tweak to CM to avoid getting ML syntax error messages twice.
2160    
2161    ----------------------------------------------------------------------
2162    Name: Matthias Blume
2163    Date: 2000/08/31 18:00:00 JST
2164    Tag: blume-20000831-cvsbootfiles
2165    Description:
2166    
2167    New URL for boot files (because the 110.29 files on the BL server do
2168    now work correctly with my updated install scripts for yacc and lex).
2169    
2170    ----------------------------------------------------------------------
2171    Name: Matthias Blume
2172    Date: 2000/08/08 12:33:00 JST
2173    Tag: blume-20000808-manual
2174    Description:
2175    
2176    Tiny update to CM manual.
2177    
2178    ----------------------------------------------------------------------
2179    Name: Allen Leung
2180    Date: 2000/08/7 19:31:00
2181    Tag: leunga-20000807-a-whole-bunch-of-stuff
2182    
2183      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2184    and Mobdy.
2185    
2186    1.  x86
2187    
2188       a.  Fixes to peephole module by John and Dan.
2189       b.  Assembly fix to SETcc by Allen.
2190       c.  Fix to c-call by John.
2191       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2192       e.  Instruction selection optimization to SETcc as suggested by John.
2193    
2194           For example,
2195    
2196            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2197    
2198           should generate:
2199    
2200            MOVL a, x
2201            SUBL b, x
2202            SHRL 31, x
2203    
2204    2.  IR stuff
2205    
2206         A bunch of new DJ-graph related algorithms added.  These
2207         speed up SSA construction.
2208    
2209    3.  SSA + Scheduling
2210    
2211         Added code for SSA and scheduling to the repository
2212    
2213    ----------------------------------------------------------------------
2214    Name: Lal George
2215    Date: 2000/07/27 11:53:14 EDT
2216    
2217    Tag: lal-20000727-linux-ppc
2218    Description:
2219    
2220     Made changes to support Linux PPC.
2221     p.s. I have confirmation that the 110.29 boot files work fine.
2222    
2223    ----------------------------------------------------------------------
2224    Name: Matthias Blume
2225    Date: 2000/07/27 17:40:00 JST
2226    Tag: blume-20000727-scripts
2227    Description:
2228    
2229    !!!! WARNING !!!!
2230    You must recompile the runtime system!
2231    !!!! WARNING !!!!
2232    
2233    This is basically another round of script-enhancements:
2234    
2235    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2236       and undefine CM preprocessor symbols.
2237    
2238    2. ml-build avoids generating a new heap image if it finds that the
2239       existing one is still ok.  (The condition is that no ML file had to
2240       be recompiled and all ML files are found to be older that the heap
2241       file.)
2242    
2243       To make this work smoothly, I also hacked the runtime system as
2244       well as SMLofNJ.SysInfo to get access to the heap image suffix
2245       (.sparc-solaris, ...) that is currently being used.
2246    
2247       Moreover, the signature of CM.mk_standalone has changed.  See the
2248       CM manual.
2249    
2250    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2251       CM manual for details.)
2252    
2253    4. More CM manual updates:
2254        - all of the above has been documented.
2255        - there is now a section describing the (CM-related) command line
2256          arguments that are accepted by the "sml" command
2257    
2258    ----------------------------------------------------------------------
2259    Name: Matthias Blume
2260    Date: 2000/07/25 16:20:00 JST
2261    Tag: blume-20000725-makedepend
2262    Description:
2263    
2264    Added a script called ml-makedepend.  This can be used in makefiles
2265    for Unix' make in a way very similar to the "makedepend" command for
2266    C.
2267    
2268    The script internally uses function CM.sources.
2269    
2270    Synopsis:
2271    
2272        ml-makedepend [-f makefile] cmfile targetname
2273    
2274    The default for the makefile is "makefile" (or "Makefile" should
2275    "makefile" not exist).
2276    
2277    ml-makedepend adds a cmfile/targetname-specific section to this
2278    makefile (after removing the previous version of this section).  The
2279    section contains a single dependency specification with targetname on
2280    the LHS (targetname is an arbitrary name), and a list of files derived
2281    from the cmfile on the RHS.  Some of the files on the RHS are
2282    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2283    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2284    path names.  The makefile writer is responsible for making sure that
2285    these variables have correct at the time "make" is invoked.
2286    
2287    ----------------------------------------------------------------------
2288    Name: Matthias Blume
2289    Date: 2000/07/22 23:30:00 JST
2290    Tag: blume-20000722-urlupdate
2291    Description:
2292    
2293    Changed BOOT and config/srcarchiveurl to point to BL server:
2294    
2295        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2296    
2297    ----------------------------------------------------------------------
2298    Name: Matthias Blume
2299    Date: 2000/07/18 18:00:00 JST
2300    Tag: blume-20000718-Version_110_29
2301    Description:
2302    
2303    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2304    
2305    2. Updated config/version to 110.29
2306    
2307    3. Updated config/srcarchiveurl
2308    
2309    3. New boot files!
2310       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2311    
2312    ----------------------------------------------------------------------
2313    Name: Matthias Blume
2314    Date: 2000/07/11 13:58:00 JST
2315    Tag: blume-20000711-doctypo
2316    Description:
2317    
2318    Fixed a few typos in CM manual.
2319    
2320    ----------------------------------------------------------------------
2321    Name: Allen Leung
2322    Date: 2000/06/15 00:38:00
2323    Tag: leunga-20000704-sparc-x86
2324    
2325    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2326    2. fix to x86 RET bug [found by Dan Grossman]
2327    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2328    
2329       Affects c-- and moby only
2330    
2331    ----------------------------------------------------------------------
2332    Name: Matthias Blume
2333    Date: 2000/07/04 15:26:00
2334    Tag: blume-20000704-trigger
2335    Description:
2336    
2337    1. Improvements to CM manual.
2338    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2339       of getting a back-trace.  The function, when called, raises an
2340       internal exception which explicitly carries the full back-trace history,
2341       so it is unaffected by any intervening handle-raise pairs ("trivial"
2342       or not).  The interactive loop will print that history once it arrives
2343       at top level.
2344       Short of having all exceptions implicitly carry the full history, the
2345       recommended way of using this facility is:
2346         - compile your program with instrumentation "on"
2347         - run it, when it raises an exception, look at the history
2348         - if the history is "cut off" because of some handler, go and modify
2349           your program so that it explicitly calls BTrace.trigger
2350         - recompile (still instrumented), and rerun; look at the full history
2351    
2352    ----------------------------------------------------------------------
2353    Name: Matthias Blume
2354    Date: 2000/07/03 15:36:00 JST
2355    Tag: blume-20000702-manual
2356    Description:
2357    
2358    Small corrections and updates to CM manual.
2359    
2360    ----------------------------------------------------------------------
2361    Name: Matthias Blume
2362    Date: 2000/06/29 16:04:00 JST
2363    Tag: blume-20000629-yacctool
2364    Description:
2365    
2366    Changes:
2367    
2368    1. Class "mlyacc" now takes separate arguments to pass options to
2369       generated .sml- and .sig-files independently.
2370    2. Corresponding CM manual updates.
2371    3. BTrace module now also reports call sites.  (However, for loop clusters
2372       it only shows from where the cluster was entered.)  There are associated
2373       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2374    
2375    ----------------------------------------------------------------------
2376    Name: Matthias Blume
2377    Date: 2000/06/27 16:51:00 JST
2378    Tag: blume-20000627-noweb
2379    Description:
2380    
2381    Changes:
2382    
2383     1. Implemented "subdir" and "witness" options for noweb tool.
2384        This caused some slight internal changes in CM's tool implementation.
2385     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2386        some remaining issues from earlier path anchor changes.
2387     3. Updated CM manual accordingly.
2388    
2389     4. Changed implementation of back-tracing so that I now consider it
2390        ready for prime-time.
2391    
2392        In particular, you don't have to explicitly trigger the back-trace
2393        anymore.  Instead, if you are running BTrace-instrumented code and
2394        there is an uncaught exception (regardless of whether or not it was
2395        raised in instrumented code), the top-level evalloop will print
2396        the back-trace.
2397    
2398        Features:
2399    
2400          - Instrumented and uninstrumented code work together seemlessly.
2401            (Of course, uninstrumented code is never mentioned in actual
2402             back-traces.)
2403    
2404          - Asymptotic time- and space-complexity of instrumented code is
2405            equal to that of uninstrumented code.  (This means that
2406            tail-recursion is preserved by the instrumentation phase.)
2407    
2408          - Modules whose code has been instrumented in different sessions
2409            work together without problem.
2410    
2411          - There is no penalty whatsoever on uninstrumented code.
2412    
2413          - There is no penalty on "raise" expressions, even in
2414            instrumented code.
2415    
2416        A potential bug (or perhaps it is a feature, too):
2417    
2418          A back-trace reaches no further than the outermost instrumented
2419          non-trivial "raise".  Here, a "trivial" raise is one that is the
2420          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2421    
2422               <exp> handle e => raise e
2423    
2424          and even
2425    
2426               <exp> handle Foo => raise Bar
2427    
2428          and, of course, through
2429    
2430               <exp> handle Foo => ...
2431    
2432         if the exception was not Foo.
2433    
2434         Back-traces always reach right through any un-instrumented code
2435         including any of its "handle" expressions, trivial or not.
2436    
2437       To try this out, do the following:
2438    
2439         - Erase all existing binfiles for your program.
2440           (You may keep binfiles for those modules where you think you
2441            definitely don't need back-tracing.)
2442         - Turn on back-trace instrumentation:
2443              SMLofNJ.Internals.BTrace.mode (SOME true);
2444         - Recompile your program.  (I.e., run "CM.make" or "use".)
2445         - You may now turn instrumentation off again (if you want):
2446              SMLofNJ.Internals.BTrace.mode (SOME false);
2447         - Run your program as usual.  If it raises an exception that
2448           reaches the interactive toplevel, then a back-trace will
2449           automatically be printed.  After that, the toplevel loop
2450           will print the exception history as usual.
2451    
2452    ----------------------------------------------------------------------
2453    Name: Matthias Blume
2454    Date: 2000/06/26 09:56:46 JST
2455    Tag: blume-20000626-setup
2456    Description:
2457    
2458    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2459          ML code before and after compiling a file (e.g., to set compiler
2460          flags)
2461    
2462    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2463              - associated changes to btrace.sml (BTrace instrumentation pass)
2464              - cleaner implementation of btimp.sml (BTrace tracing and report
2465                module)
2466    
2467    CM manual: * new path encoding documented
2468               * description of setup-parameter to "sml" added
2469    
2470    The biggest user-visible change to back-tracing is that it is no
2471    longer necessary to compile all traced modules within the same
2472    session.  (This was a real limitation.)
2473    
2474    ----------------------------------------------------------------------
2475    Name: Matthias Blume
2476    Date: 2000/06/24 12:40:00 JST
2477    Tag: blume-20000624-startup
2478    Description:
2479    
2480    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2481    bit too often -- to put it mildly. :)
2482    
2483    ----------------------------------------------------------------------
2484    Name: Matthias Blume
2485    Date: 2000/06/23 18:20:00 JST
2486    Tag: blume-20000623-btrace
2487    Description:
2488    
2489    This updates adds a backtrace facility to aid programmers in debugging
2490    their programs.  This involves the following changes:
2491    
2492    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2493       keeping track of the current call stack.  When programs are compiled
2494       in a special mode, the compiler will insert calls to these hooks
2495       into the user program.
2496       "Hook" means that it is possible for different implementations of
2497       back-tracing to register themselves (at different times).
2498    
2499    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2500       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2501       It can be turned on using this call:
2502         SMLofNJ.Internals.BTrace.mode (SOME true);
2503       Turning it off again:
2504         SMLofNJ.Internals.BTrace.mode (SOME false);
2505       Querying the current status:
2506         SMLofNJ.Internals.BTrace.mode NONE;
2507       Annotated programs are about twice as big as normal ones, and they
2508       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2509       where all hooks do nothing).  The slowdown with a plugin that is
2510       actually useful (such as the one supplied by default) is even greater,
2511       but in the case of the default plugin it is still only an constant
2512       factor (amortized).
2513    
2514    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2515       with a sub-structure BTrace for controlling back-tracing.  In particular,
2516       the above-mentioned function "mode" controls whether the annotation
2517       phase is invoked by the compiler.  Another important function is
2518       "trigger": when called it aborts the current execution and causes
2519       the top-level loop to print a full back-trace.
2520    
2521    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2522       for back-tracing.  It keeps track of the dynamic call stack and in
2523       addition to that it keeps a partial history at each "level" of that
2524       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2525       d and b (at separate times, dynamically), then the report will show:
2526    
2527       GOTO   d
2528             /c
2529       GOTO  \b
2530       CALL   a
2531    
2532       This shows that there was an initial non-tail call of a, then a
2533       tail-call to b or c, looping behavior in a cluster of functions that
2534       consist of b and c, and then a goto from that cluster (i.e., either from
2535       b or from c) to d.
2536    
2537       Note that (depending on the user program) the amount of information
2538       that the back-trace module has to keep track of at each level is bounded
2539       by a constant.  Thus, the whole implementation has the same asymptotical
2540       complexity as the original program (both in space and in time).
2541    
2542    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2543       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2544       which is raised by the "trigger" function mentioned above.
2545    
2546    Notes on usage:
2547    
2548    - Annotated code works well together with unannotated code:
2549    Unannotated calls simply do not show up at all in the backtrace.
2550    
2551    - It is not a good idea to let modules that were annotated during
2552    different sessions run at the same time.  This is because the compiler
2553    chooses small integers to identify individual functions, and there
2554    will be clashes if different modules were compiled in separate sessions.
2555    (Nothing will crash, and you will even be told about the clashes, but
2556    back-trace information will in general not be useful.)
2557    
2558    - Back-tracing can be confused by callcc and capture.
2559    
2560    - The only way of getting a back-trace right now is to explicitly
2561    invoke the "trigger" function from your user program.  Eventually, we
2562    should make every exception carry back-trace information (if
2563    available).  But since this creates more overhead at "raise"-time
2564    (similar to the current exnHistory overhead), I have not yet
2565    implemented this.  (The implementation will be rather easy.)  With
2566    exceptions carrying back-trace information, this facility will be even
2567    more useful because users don't need to modify their programs...
2568    
2569    - While it is possible to compile the compiler with back-trace
2570    annotations turned on (I did it to get some confidence in
2571    correctness), you must make absolutely sure that core.sml and
2572    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2573    be compiled with annotation because there is no core access yet, but
2574    if you compile btimp.sml with annotation, then the system will go into
2575    an infinite recursion and crash.)
2576    Since CM currently does not know about BTrace, the only way to turn
2577    annotations on and off for different modules of the compiler is to
2578    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2579    this is awkward and clumsy.
2580    
2581    Sample sessions:
2582    
2583    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2584    - SMLofNJ.Internals.BTrace.mode (SOME true);
2585    [autoloading]
2586    [autoloading done]
2587    val it = false : bool
2588    - structure X = struct
2589    -     fun main n = let
2590    -         fun a (x, 0) = d x
2591    -           | a (x, n) = b (x, n - 1)
2592    -         and b (x, n) = c (x, n)
2593    -         and c (x, n) = a (x, n)
2594    -         and d x = e (x, 3)
2595    -         and e (x, 0) = f x
2596    -           | e (x, n) = e (x, n - 1)
2597    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2598    -           | f n = n * g (n - 1)
2599    -         and g n = a (n, 3)
2600    -     in
2601    -         f n
2602    -     end
2603    - end;
2604    structure X : sig val main : int -> int end
2605    - X.main 3;
2606    *** BACK-TRACE ***
2607    GOTO   stdIn:4.2-13.20: X.main[2].f
2608    GOTO-( stdIn:4.2-13.20: X.main[2].e
2609    GOTO   stdIn:4.2-13.20: X.main[2].d
2610         / stdIn:4.2-13.20: X.main[2].a
2611         | stdIn:4.2-13.20: X.main[2].b
2612    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2613    CALL   stdIn:4.2-13.20: X.main[2].g
2614    GOTO   stdIn:4.2-13.20: X.main[2].f
2615    GOTO-( stdIn:4.2-13.20: X.main[2].e
2616    GOTO   stdIn:4.2-13.20: X.main[2].d
2617         / stdIn:4.2-13.20: X.main[2].a
2618         | stdIn:4.2-13.20: X.main[2].b
2619    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2620    CALL   stdIn:4.2-13.20: X.main[2].g
2621    GOTO   stdIn:4.2-13.20: X.main[2].f
2622    GOTO-( stdIn:4.2-13.20: X.main[2].e
2623    GOTO   stdIn:4.2-13.20: X.main[2].d
2624         / stdIn:4.2-13.20: X.main[2].a
2625         | stdIn:4.2-13.20: X.main[2].b
2626    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2627    CALL   stdIn:4.2-13.20: X.main[2].g
2628    GOTO   stdIn:4.2-13.20: X.main[2].f
2629    CALL   stdIn:2.15-17.4: X.main[2]
2630    -
2631    
2632    (Note that because of a FLINt bug the above code currently does not
2633    compile without BTrace turned on.)
2634    
2635    Here is another example, using my modified Tiger compiler:
2636    
2637    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2638    - SMLofNJ.Internals.BTrace.mode (SOME true);
2639    [autoloading]
2640    [autoloading done]
2641    val it = false : bool
2642    - CM.make "sources.cm";
2643    [autoloading]
2644    ...
2645    [autoloading done]
2646    [scanning sources.cm]
2647    [parsing (sources.cm):parse.sml]
2648    [creating directory CM/SKEL ...]
2649    [parsing (sources.cm):tiger.lex.sml]
2650    ...
2651    [wrote CM/sparc-unix/semant.sml]
2652    [compiling (sources.cm):main.sml]
2653    [wrote CM/sparc-unix/main.sml]
2654    [New bindings added.]
2655    val it = true : bool
2656    - Main.compile ("../testcases/merge.tig", "foo.out");
2657    *** BACK-TRACE ***
2658    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2659    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2660    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2661    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2662    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2663    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2664    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2665         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2666    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2667    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2668    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2669    CALL   main.sml:1.18-118.4: Main.compile[2]
2670    -
2671    
2672  ----------------------------------------------------------------------  ----------------------------------------------------------------------
2673  Name: Matthias Blumen  Name: Matthias Blumen
2674  Date: 2000/06/21 18:00:00 JST  Date: 2000/06/21 18:00:00 JST
# Line 968  Line 3626 
3626       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3627       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3628       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
3629       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3630       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3631       Dave's hands. :)       Dave's hands. :)
3632    

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