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revision 756, Thu Dec 14 16:01:33 2000 UTC revision 1055, Thu Feb 7 20:38:59 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: 2002/02/07 15:34:13 EST 2002
18    Tag: <none>
19    Description:
20    
21    Compilers that generate assembly code may produce  global labels
22    whose value is resolved at link time. The various peephole optimization
23    modules did not take this in account.
24    
25    TODO. The Labels.addrOf function should really return an option
26    type so that clients are forced to deal with this issue, rather
27    than an exception being raised.
28    
29    ----------------------------------------------------------------------
30    Name: Lal George
31    Date: 2002/02/06 13:55:02 EST
32    Tag: george-20020206-ra-breakup
33    Description:
34    
35    1. A bug fix from Allen.
36    
37        A typo causes extra fstp %st(0)'s to be generated at compensation
38        edges, which might cause stack underflow traps at runtime.  This
39        occurs in fft where there are extraneous fstps right before the 'into'
40        trap instruction (in this case they are harmless since none of the
41        integers overflow.)
42    
43    2. Pulled out various utility modules that were embedded in the modules
44       of the register allocator. I need these modules for other purposes, but
45       they are not complete enough to put into a library (just yet).
46    ----------------------------------------------------------------------
47    Name: Matthias Blume
48    Date: 2002/01/31 16:05:00 EST
49    Tag: blume-20020131-sparc-ccalls
50    Description:
51    
52    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
53       of extra stack space by mistake.  Fixed.
54    
55    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
56    
57    ----------------------------------------------------------------------
58    Name: Allen Leung
59    Date: 2002/01/30
60    Tag: leunga-20020130-nowhere-bug-fix
61    Description:
62    
63       MLRISC bug fixes:
64       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
65       2. MachineInt.fromString was negating its value.
66    
67    ----------------------------------------------------------------------
68    Name: Matthias Blume
69    Date: 2002/01/29
70    Tag: blume-20020129-INSTALL
71    Description:
72    
73    - Added somewhat detailed installation instructions (file INSTALL).
74    - Fixed curl-detection bug in config/install.sh.
75    - It is now possible to select the URL getter using the URLGETTER
76      environment variable:
77    
78          not set / "unknown"      --> automatic detection (script tries wget,
79                                       curl, and lynx)
80          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
81                                       how to properly invoke them)
82          other                    --> use $URLGETTER directly, it must take
83                                       precisely two command-line arguments
84                                       (source URL and destination file name)
85    
86    ----------------------------------------------------------------------
87    Name: Matthias Blume
88    Date: 2002/01/28
89    Tag: blume-20020128-sparc-ccalls
90    Description:
91    
92    - Fixed problem with calculation of "used" registers in sparc-c-calls.
93    - Make use of the allocParam argument in sparc-c-calls.
94    
95    ----------------------------------------------------------------------
96    Name: Matthias Blume
97    Date: 2002/01/28
98    Tag: blume-20020128-allocParam
99    Description:
100    
101    John Reppy:  Changes c-calls API to accept client-callback for
102    allocating extra stack space.
103    me: Corresponding changes to mlriscGen (using a dummy argument that
104        does not change the current behavior).
105    
106    ----------------------------------------------------------------------
107    Name: Matthias Blume
108    Date: 2002/01/28 12:00:00
109    Tag: Release_110_38
110    Description:
111    
112    This time for real!!!
113    
114    ----------------------------------------------------------------------
115    Name: Matthias Blume
116    Date: 2002/01/28 10:56:00 EST
117    Tag: blume-20020128-retraction
118    Description:
119    
120    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
121       with blume-Release_110_38-retracted.)
122    
123    1. Fixed a problem with incorrect rounding modes in real64.sml.
124       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
125    
126    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
127       and enums fixed.  The naming of corresponding ML identifiers should
128       now be consistent again.
129    
130    ----------------------------------------------------------------------
131    Name: Allen Leung
132    Date: 2002/01/27
133    Tag: leunga-20020127-nowhere
134    Description:
135    
136       Added a target called nowhere in the configuration scripts.
137       Enabling this will build the MLRISC 'nowhere' tool (for translating
138       programs with where-clauses into legal SML code) during installation.
139    
140    ----------------------------------------------------------------------
141    Name: Matthias Blume
142    Date: 2002/01/25 21:27:00 EST
143    Tag: blume-Release_110_38-retracted
144    Description:
145    
146    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
147    
148    README will be added later.
149    
150    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
151    (Release_110_38) removed.  Reason: Last-minute bug fixes.
152    
153    ----------------------------------------------------------------------
154    Name: Matthias Blume
155    Date: 2002/01/25
156    Tag: blume-20020125-ffi
157    Description:
158    
159    A large number of tweaks and improvements to ml-nlffi-lib and
160    ml-nlffigen:
161    
162       - ML represenation types have been streamlined
163       - getter and setter functions work with concrete values, not abstract
164         ones where possible
165       - ml-nlffigen command line more flexible (see README file there)
166       - some bugs have been fixed (hopefully)
167    
168    ----------------------------------------------------------------------
169    Name: Lal George
170    Date: 2002/01/24
171    Tag: george-20020124-risc-ra-interface
172    Description:
173    
174       There is a dramatic simplification in the interface to the
175       register allocator for RISC architectures as a result of making
176       parallel copy instructions explicit.
177    
178    ----------------------------------------------------------------------
179    Name: Matthias Blume
180    Date: 2002/01/22
181    Tag: blume-20020122-x86-ccalls
182    Description:
183    
184    Bug fix for c-calls on x86 (having to do with how char- and
185    short-arguments are being handled).
186    
187    ----------------------------------------------------------------------
188    Name: Matthias Blume
189    Date: 2002/01/21
190    Tag: blume-20020121-ff
191    Description:
192    
193    Another day of fiddling with the FFI...
194    
195    1. Bug fix/workaround:  CKIT does not complain about negative array
196       dimensions, so ml-nlffigen has to guard itself against this possibility.
197       (Otherwise a negative dimension would send it into an infinite loop.)
198    
199    2. Some of the abstract types (light objects, light pointers, most "base"
200       types) in structure C are now eqtypes.
201    
202    3. Added constructors and test functions for NULL function pointers.
203    
204    ----------------------------------------------------------------------
205    Name: Matthias Blume
206    Date: 2002/01/18
207    Tag: blume-20020118-ready-for-new-release
208    Description:
209    
210    Made config/srcarchiveurl point to a new place.  (Will provide boot
211    files shortly.)
212    
213    Maybe we christen this to be 110.38?
214    
215    ----------------------------------------------------------------------
216    Name: Matthias Blume
217    Date: 2002/01/18
218    Tag: blume-20020118-more-ffifiddle
219    Description:
220    
221    Today's FFI fiddling:
222    
223      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
224        C.Set.* that use concrete (MLRep.*) arguments and results instead
225        of abstract ones.
226    
227      - Provided word-style bit operations etc. for "int" representation
228        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
229        and Long.
230    
231    ----------------------------------------------------------------------
232    Name: Matthias Blume
233    Date: 2002/01/18
234    Tag: blume-20020118-use-x86-fp
235    Description:
236    
237    Now that x86-fast-fp seems to be working, I turned it back on again
238    by default.  (Seems to work fine now, even with the FFI.)
239    
240    Other than that, I added some documentation about the FFI to
241    src/ml-nlffigen/README and updated the FFI test examples in
242    src/ml-nlffi-lib/Tests/*.
243    
244    ----------------------------------------------------------------------
245    Name: Allen Leung
246    Date: 2002/01/17
247    Tag: leunga-20020117-x86-fast-fp-call
248    Description:
249    
250       1. Fixed a problem with handling return fp values when x86's fast fp
251          mode is turned on.
252    
253       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
254          of %f32.
255    
256       3. Added a constructor INT32lit to the ast of MLRISC tools.
257    
258    ----------------------------------------------------------------------
259    Name: Matthias Blume
260    Date: 2002/01/16
261    Tag: blume-20020116-ffifiddle
262    Description:
263    
264    More fiddling with the FFI interface:
265    
266     - Make constness 'c instead of rw wherever possible.  This eliminates
267       the need for certain explicit coercions.  (However, due to ML's
268       value polymorphism, there will still be many cases where explicit
269       coercions are necessary.  Phantom types are not the whole answer
270       to modeling a subtyping relationship in ML.)
271    
272     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
273    
274     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
275       clumsy workaround for varargs problem.)
276    
277    ----------------------------------------------------------------------
278    Name: Lal George
279    Date: 2002/01/15
280    Tag: <none>
281    Description:
282    
283    1. Since COPY instructions are no longer native to the architecture,
284       a generic functor can be used to implement the expandCopies function.
285    
286    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
287       TEXT segment.
288    
289    ----------------------------------------------------------------------
290    Name: Matthias Blume
291    Date: 2002/01/15
292    Tag: blume-20020115-ffiupdates
293    Description:
294    
295    1. Fix for bug resulting in single-precision float values being returned
296       incorrectly from FFI calls.
297    
298    2. Small modifications to C FFI API:
299    
300        - memory-allocation routines return straight objects (no options)
301          and raise an exception in out-of-memory situations
302        - unsafe extensions to cast between function pointers and pointers
303          from/to ints
304        - added structure C_Debug as an alternative to structure C where
305          pointer-dereferencing (|*| and |*!) always check for null-pointers
306        - added open_lib' to DynLinkage;  open_lib' works like open_lib
307          but also takes a (possibly empty) list of existing library handles
308          that the current library depends on
309    
310    ----------------------------------------------------------------------
311    Name: Matthias Blume
312    Date: 2002/01/10
313    Tag: blume-20020110-newffigen
314    Description:
315    
316    1. Updates to portable graph code.
317    
318    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
319       more scalable now so that even huge interfaces such as the one
320       for GTK compile in finite time and space. :-)
321       See src/ml-nlffigen/README for details on what's new.
322    
323    ----------------------------------------------------------------------
324    Name: Lal George
325    Date: 2001/01/09 14:31:35 EST 2002
326    Tag: george-20011206-rm-native-copy
327    Description:
328    
329            Removed the native COPY and FCOPY instructions
330            from all the architectures and replaced it with the
331            explicit COPY instruction from the previous commit.
332    
333            It is now possible to simplify many of the optimizations
334            modules that manipulate copies. This has not been
335            done in this change.
336    
337    ----------------------------------------------------------------------
338    Name: Lal George
339    Date: 2001/12/06 16:50:13 EST 2001
340    Tag: george-20011206-mlrisc-instruction
341    Description:
342    
343    Changed the representation of instructions from being fully abstract
344    to being partially concrete. That is to say:
345    
346      from
347            type instruction
348    
349      to
350            type instr                              (* machine instruction *)
351    
352            datatype instruction =
353                LIVE of {regs: C.cellset, spilled: C.cellset}
354              | KILL of {regs: C.cellset, spilled: C.cellset}
355              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
356              | ANNOTATION of {i: instruction, a: Annotations.annotation}
357              | INSTR of instr
358    
359    This makes the handling of certain special instructions that appear on
360    all architectures easier and uniform.
361    
362    LIVE and KILL say that a list of registers are live or killed at the
363    program point where they appear. No spill code is generated when an
364    element of the 'regs' field is spilled, but the register is moved to
365    the 'spilled' (which is present, more for debugging than anything else).
366    
367    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
368    We used to generate:
369    
370            DEFFREG f1
371            f1 := f2 + f3
372            trapb
373    
374    but now generate:
375    
376            f1 := f2 + f3
377            trapb
378            LIVE {regs=[f1,f2,f3], spilled=[]}
379    
380    Furthermore, the DEFFREG (hack) required that all floating point instruction
381    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
382    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
383    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
384    this architecture).
385    
386    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
387    all the architectures. This will result in further simplification of the
388    register allocator that must be aware of them for coalescing purposes, and
389    will also simplify certain aspects of the machine description that provides
390    callbacks related to parallel copies.
391    
392    ANNOTATION should be obvious, and now INSTR represents the honest to God
393    machine instruction set!
394    
395    The <arch>/instructions/<arch>Instr.sml files define certain utility
396    functions for making porting easier -- essentially converting upper case
397    to lower case. All machine instructions (of type instr) are in upper case,
398    and the lower case form generates an MLRISC instruction. For example on
399    the alpha we have:
400    
401      datatype instr =
402         LDA of {r:cell, b:cell, d:operand}
403       | ...
404    
405      val lda : {r:cell, b:cell, d:operand} -> instruction
406        ...
407    
408    where lda is just (INSTR o LDA), etc.
409    
410    ----------------------------------------------------------------------
411    Name: Matthias Blume
412    Date: 2001/11/22 21:40:00 EST
413    Tag: Release_110_37
414    Description:
415    
416    Release 110.37.  This time for real.
417    
418    ----------------------------------------------------------------------
419    Name: Matthias Blume
420    Date: 2001/11/21 16:35:00 EST
421    Tag: blume-20011121-foot-in-mouth
422    Description:
423    
424    Removed the "Release_110_37" tag because of a serious bug.
425    This will be re-tagged once the bug is fixed.
426    
427    ----------------------------------------------------------------------
428    Name: Matthias Blume
429    Date: 2001/11/21 16:14:00 EST
430    Tag: blume-20011121-forgottenfile
431    Description:
432    
433    Forgot to add a file.  (Just a .tex-file -- part of
434    the CM manual source.)
435    
436    ----------------------------------------------------------------------
437    Name: Matthias Blume
438    Date: 2001/11/21 16:10:00 EST
439    Tag: blume-20011121-invalid_110_37
440    Description:
441    
442    Note: I removed the original tag "Release_110_37" from this commit
443          because we found a serious bug in all non-x86 backends.
444          - Matthias
445    
446    1. Modifications to the SML/NJ code generator and to the runtime system
447       so that code object name strings are directly inserted into code
448       objects at code generation time.  The only business the runtime system
449       has with this is now to read the name strings on occasions.
450       (The encoding of the name string has also changed somewhat.)
451    
452    2. CM now implements a simple "set calculus" for specifying export lists.
453       In particular, it is now possible to refer to the export lists of
454       other libraries/groups/sources and form unions as well as differences.
455       See the latest CM manual for details.
456    
457    3. An separate notion of "proxy" libraries has again be eliminated from
458       CM's model.  (Proxy libraries are now simply a special case of using
459       the export list calculus.)
460    
461    4. Some of the existing libraries now take advantage of the new set
462       calculus.
463       (Notice that not all libraries have been converted because some
464       of the existing .cm-files are supposed to be backward compatible
465       with 110.0.x.)
466    
467    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
468       "General.exnMessage"!  The former relies on a certain hook to be
469       initialized, and that often does not happen in the stand-alone case.)
470    
471    ----------------------------------------------------------------------
472    Name: Lal George
473    Date: 2001/11/21  13:56:18 EST
474    Tag: george-2001121-pseudo-ops
475    Description:
476    
477      Implemented a complete redesign of MLRISC pseudo-ops. Now there
478      ought to never be any question of incompatabilities with
479      pseudo-op syntax expected by host assemblers.
480    
481      For now, only modules supporting GAS syntax are implemented
482      but more should follow, such as MASM, and vendor assembler
483      syntax, e.g. IBM as, Sun as, etc.
484    
485    ----------------------------------------------------------------------
486    Name: Matthias Blume
487    Date: 2001/11/14 11:52:00 EST
488    Tag: blume-20011114-srcname
489    Description:
490    
491    1. Routed the name of the current source file to mlriscgen where it
492       should be directly emitted into the code object.  (This last part
493       is yet to be done.)
494    
495    2. Some cleanup of the pgraph code to make it match the proposal that
496       I put out the other day.  (The proposal notwithstanding, things are
497       still in flux here.)
498    
499    ----------------------------------------------------------------------
500    Name: Lal George
501    Date: 2001/11/14 09:44:04 EST
502    Tag:
503    Description:
504    
505      Fix for a backpatching bug reported by Allen.
506    
507      Because the boundary between short and long span-dependent
508      instructions is +/- 128, there are an astounding number of
509      span-dependent instructions whose size is over estimated.
510    
511      Allen came up with the idea of letting the size of span
512      dependent instructions be non-monotonic, for a maxIter
513      number of times, after which the size must be monotonically
514      increasing.
515    
516      This table shows the number of span-dependent instructions
517      whose size was over-estimated as a function of maxIter, for the
518      file Parse/parse/ml.grm.sml:
519    
520         maxIter            # of instructions:
521            10                      687
522            20                      438
523            30                      198
524            40                        0
525    
526      In compiling the compiler, there is no significant difference in
527      compilation speed between maxIter=10 and maxIter=40. Actually,
528      my measurements showed that maxIter=40 was a tad faster than
529      maxIter=10! Also 96% of the  files in the compiler reach a fix
530      point within 13 iterations, so fixing maxIter at 40, while high,
531      is okay.
532    
533    ----------------------------------------------------------------------
534    Name: Matthias Blume
535    Date: 2001/10/31 15:25:00 EST
536    Tag: blume-20011031-pgraph
537    Description:
538    
539    CKIT:
540    * Changed the "Function" constructor of type Ast.ctype to carry optional
541      argument identifiers.
542    * Changed the return type of TypeUtil.getFunction accordingly.
543    * Type equality ignores the argument names.
544    * TypeUtil.composite tries to preserve argument names but gives up quickly
545      if there is a mismatch.
546    
547    installation script:
548    * attempts to use "curl" if available (unless "wget" is available as well)
549    
550    CM:
551    * has an experimental implementation of "portable graphs" which I will
552      soon propose as an implementation-independent library format
553    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
554    
555    NLFFI-LIB:
556    * some cleanup (all cosmetic)
557    
558    NLFFIGEN:
559    * temporarily disabled the mechanism that suppresses ML output for
560      C definitions whose identifiers start with an underscore character
561    * generate val bindings for enum constants
562    * user can request that only one style (light or heavy) is being used;
563      default is to use both (command-line arguments: -heavy and -light)
564    * fixed bug in handling of function types involving incomplete pointers
565    * generate ML entry points that take record arguments (i.e., using
566      named arguments) for C functions that have a prototype with named
567      arguments
568      (see changes to CKIT)
569    
570    ----------------------------------------------------------------------
571    Name: Allen Leung
572    Date: 2001/10/27 20:34:00 EDT
573    Tag: leunga-20011027-x86-fast-fp-call
574    Description:
575    
576       Fixed the bug described in blume-20010920-slowfp.
577    
578       The fix involves
579          1. generating FCOPYs in FSTP in ia32-svid
580          2. marking a CALL with the appropriate annotation
581    
582    ----------------------------------------------------------------------
583    Name: Matthias Blume
584    Date: 2001/10/16 11:32:00 EDT
585    Tag: blume-20011016-netbsd
586    Description:
587    
588    Underscore patch from Chris Richards (fixing problem with compiling
589    runtime system under recent NetBSD).
590    
591    ----------------------------------------------------------------------
592    Name: Allen Leung
593    Date: 2001/10/12 17:18:32 EDT 2001
594    Tag: leung-20011012-x86-printflowgraph
595    Description:
596    
597    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
598    
599    ----------------------------------------------------------------------
600    Name: Lal George
601    Date: 2001/10/11 23:51:34 EDT
602    Tag: george-20011011-too-many-instrs
603    Description:
604    
605    The representation of a program point never expected to see more
606    than 65536 instructions in a basic block!
607    
608    ----------------------------------------------------------------------
609    Name: Lal George
610    Date: 2001/10/09 09:41:37 EDT
611    Tag: george-20011008-mlrisc-labels
612    Description:
613    
614    Changed the machine description files to support printing of
615    local and global labels in assembly code, based on host assembler
616    conventions.
617    
618    ----------------------------------------------------------------------
619    Name: Matthias Blume
620    Date: 2001/09/25 15:25:00 EDT
621    Tag: blume-20010925-exninfo
622    Description:
623    
624    I provided a non-hook implementation of exnName (at the toplevel) and
625    made the "dummy" implementation of exnMessage (at the toplevel) more
626    useful: if nothing gets "hooked in", then at least you are going to
627    see the exception name and a message indicating why you don't see more.
628    
629    [For the time being, programs that need exnMessage and want to use
630    ml-build should either use General.exnMessage (strongly recommended) or
631    refer to structure General at some other point so that CM sees a
632    static dependency.]
633    
634    [Similar remarks go for "print" and "use":  If you want to use their
635    functionality in stand-alone programs generated by ml-build, then use
636    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
637    
638    ----------------------------------------------------------------------
639    Name: Matthias Blume
640    Date: 2001/09/20 17:28:00 EDT
641    Tag: blume-20010920-slowfp
642    Description:
643    
644    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
645    
646    ----------------------------------------------------------------------
647    Name: Matthias Blume
648    Date: 2001/09/20 17:20:00 EDT
649    Tag: blume-20010920-canonicalpaths
650    Description:
651    
652    0. Updated the BOOT file (something that I forgot to do earlier).
653    
654    1. Small internal change to CM so that it avoids "/../" in filenames
655       as much as possible (but only where it is safe).
656    
657    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
658       that arguments that contain delimiters are passed through correctly.
659       This change also means that all "special" arguments of the form
660       @SMLxxx... must come first.
661    
662    3. Changed install script to put relative anchor names for tool commands
663       into pathconfig.
664    
665    ----------------------------------------------------------------------
666    Name: Matthias Blume
667    Date: 2001/09/18 15:35:00 EDT
668    Tag: blume-20010918-readme11036
669    Description:
670    
671    Added README files.
672    
673    ----------------------------------------------------------------------
674    Name: Matthias Blume
675    Date: 2001/09/18 11:45:00 EDT
676    Tag: Release_110_36 (retag)
677    Description:
678    
679    Fixed mistake in config/preloads. Retagged as 110.36.
680    
681    ----------------------------------------------------------------------
682    Name: Matthias Blume
683    Date: 2001/09/18 09:40:00 EDT
684    Tag: Release_110_36_orig (tag changed)
685    Description:
686    
687    New version (110.36).  New bootfiles.
688    
689    ----------------------------------------------------------------------
690    Name: Matthias Blume
691    Date: 2001/09/14 16:15:00 EDT
692    Tag: blume-20010914-x86fastfp
693    Description:
694    
695    John committed some changes that Allen made, in particular a (hopefully)
696    correctly working version of the x86-fp module.
697    
698    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
699    flag to "true".  Everything seems to compile to a fixpoint ok, and
700    "mandelbrot" speeds up by about 15%.
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2001/09/13 11:20:00 EDT
705    Tag: blume-20010913-minimal
706    Description:
707    
708    1. Stefan Monnier's patch to fix a miscompilation problem that
709       was brought to light by John Reppy's work on Moby.
710    
711    2. Implemented a minimal "structure Compiler" that contains just
712       "version" and "architecture".  The minimal version will be
713       available when the full version is not.  This is for backward-
714       compatibility with code that wants to test Compiler.version.
715    
716    ----------------------------------------------------------------------
717    Name: Matthias Blume
718    Date: 2001/08/28 14:03:00 EDT
719    Tag: blume-20010828-ml-lex
720    Description:
721    
722    Fix for bug 1581, received from Neophytos Michael.
723    
724    ----------------------------------------------------------------------
725    Name: Matthias Blume
726    Date: 2001/08/27 11:20:00 EDT
727    Tag: blume-20010827-readme11035
728    Description:
729    
730    Fleshed out the README file for 110.35.
731    
732    ----------------------------------------------------------------------
733    Name: Matthias Blume
734    Date: 2001/08/24 17:10:00 EDT
735    Tag: Release_110_35
736    Description:
737    
738    New version number (110.35).  New bootfiles.
739    
740    ----------------------------------------------------------------------
741    Name: Lal George
742    Date: 2001/08/24 13:47:18 EDT 2001
743    Tag: george-20010824-MLRISC-graphs
744    Description:
745    
746     removed clusters from MLRISC completely and replaced with graphs.
747    
748    ----------------------------------------------------------------------
749    Name: Matthias Blume
750    Date: 2001/08/23 17:50:00 EDT
751    Tag: blume-20010823-toplevel
752    Description:
753    
754    - some reorganization of the code that implements various kinds of
755      environments in the compiler (static, dynamic, symbolic, combined)
756    - re-implemented the EnvRef module so that evalStream works properly
757      (if the stream contains references to "use", "CM.make", etc.)
758    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
759    
760    ----------------------------------------------------------------------
761    Name: Matthias Blume
762    Date: 2001/08/20 15:50 EDT
763    Tag: blume20010820-slipup
764    Description:
765    
766    I forgot to commit a few files.  Here they are...
767    
768    ----------------------------------------------------------------------
769    Name: Matthias Blume
770    Date: 2001/08/20 15:35:00 EDT
771    Tag: blume-20010820-debugprof
772    Description:
773    
774    !!!! NEW BOOTFILES !!!!
775    
776    This is another round of reorganizing the compiler sources.  This
777    time the main goal was to factor out all the "instrumentation"
778    passes (for profiling and backtracing) into their own library.
779    The difficulty was to do it in such a way that it does not depend
780    on elaborate.cm but only on elabdata.cm.
781    
782    Therefore there have been further changes to both elaborate.cm and
783    elabdata.cm -- more "generic" things have been moved from the former
784    to the latter.  As a result, I was forced to split the assignment
785    of numbers indicating "primtyc"s into two portions: SML-generic and
786    SML/NJ-specific.  Since it would have been awkward to maintain,
787    I bit the bullet and actually _changed_ the mapping between these
788    numbers and primtycs.  The bottom line of this is that you need
789    a new set of bin- and bootfiles.
790    
791    I have built new bootfiles for all architectures, so doing a fresh
792    checkout and config/install.sh should be all you need.
793    
794    The newly created library's name is
795    
796        $smlnj/viscomp/debugprof.cm
797    
798    and its sources live under
799    
800        src/compiler/DebugProf
801    
802    ----------------------------------------------------------------------
803    Name: Matthias Blume
804    Date: 2001/08/15 17:15:00 EDT
805    Tag: blume-20010815-compreorg
806    Description:
807    
808    This is a first cut at reorganizing the CM libraries that make up the
809    core of the compiler.  The idea is to separate out pieces that could
810    be used independently by tools, e.g., the parser, the typechecker, etc.
811    
812    The current status is a step in this direction, but it is not quite
813    satisfactory yet.  Expect more changes in the future.
814    
815    Here is the current (new) organization...
816    
817        What used to be $smlnj/viscomp/core.cm is now divided into
818        six CM libraries:
819    
820             $smlnj/viscomp/basics.cm
821                           /parser.cm
822                           /elabdata.cm
823                           /elaborate.cm
824                           /execute.cm
825                           /core.cm
826    
827        The CM files for these libraries live under src/system/smlnj/viscomp.
828        All these libraries are proxy libraries that contain precisely
829        one CM library component.  Here are the locations of the components
830        (all within the src/compiler tree):
831    
832             Basics/basics.cm
833             Parse/parser.cm
834             ElabData/elabdata.cm
835             Elaborator/elaborate.cm
836             Execution/execute.cm
837             core.cm
838    
839         [This organization is the same that has been used already
840         for a while for the architecture-specific parts of the visible
841         compiler and for the old version of core.cm.]
842    
843         As you will notice, many source files have been moved from their
844         respective original locations to a new home in one of the above
845         subtrees.
846    
847         The division of labor between the new libraries is the following:
848    
849             basics.cm:
850                - Simple, basic definitions that pertain to many (or all) of
851                  the other libraries.
852             parser.cm:
853                - The SML parser, producing output of type Ast.dec.
854                - The type family for Ast is also defined and exported here.
855             elabdata.cm:
856                - The datatypes that describe input and output of the elaborator.
857                  This includes types, absyn, and static environments.
858             elaborator.cm:
859                - The SML/NJ type checker and elaborator.
860                  This maps an Ast.dec (with a given static environment) to
861                  an Absyn.dec (with a new static environment).
862                - This libraries implements certain modules that used to be
863                  structures as functors (to remove dependencies on FLINT).
864             execute.cm:
865                - Everything having to do with executing binary code objects.
866                - Dynamic environments.
867             core.cm:
868                - SML/NJ-specific instantiations of the elaborator and MLRISC.
869                - Top-level modules.
870                - FLINT (this should eventually become its own library)
871    
872    Notes:
873    
874    I am not 100% happy with the way I separated the elaborator (and its
875    data structures) from FLINT.  Two instances of the same problem:
876    
877        1. Data structures contain certain fields that carry FLINT-specific
878           information.  I hacked around this using exn and the property list
879           module from smlnj-lib.  But the fact that there are middle-end
880           specific fields around at all is a bit annoying.
881    
882        2. The elaborator calculates certain FLINT-related information.  I tried
883           to make this as abstract as I could using functorization, but, again,
884           the fact that the elaborator has to perform calculations on behalf
885           of the middle-end at all is not nice.
886    
887        3. Having to used exn and property lists is unfortunate because it
888           weakens type checking.  The other alternative (parameterizing
889           nearly *everything*) is not appealing, though.
890    
891    I removed the "rebinding =" warning hack because due to the new organization
892    it was awkward to maintain it.  As a result, the compiler now issues some of
893    these warnings when compiling init.cmi during bootstrap compilation. On
894    the plus side, you also get a warning when you do, for example:
895       val op = = Int32.+
896    which was not the case up to now.
897    
898    I placed "assign" and "deref" into the _Core structure so that the
899    code that deals with the "lazy" keyword can find them there.  This
900    removes the need for having access to the primitive environment
901    during elaboration.
902    
903    ----------------------------------------------------------------------
904    Name: Matthias Blume
905    Date: 2001/08/13
906    Tag: blume-20010813-closures
907    Description:
908    
909    This fix was sent to us by Zhong Shao.  It is supposed to improve the
910    performance of certain loops by avoiding needless closure allocation.
911    
912    ----------------------------------------------------------------------
913    Name: Lal George
914    Date: 2001/07/31 10:03:23 EDT 2001
915    Tag: george-20010731-x86-fmalloc
916    Description: Fixed bug in x86 calls
917    
918        There was a bug where call instructions would mysteriously
919        vanish. The call instruction had to be one that returned
920        a floating point value.
921    
922    ----------------------------------------------------------------------
923    Name: Lal George
924    Date: 2001/07/19 16:36:29 EDT 2001
925    Tag: george-20010719-simple-cells
926    Description:
927    
928    I have dramatically simplified the interface for CELLS in MLRISC.
929    
930    In summary, the cells interface is broken up into three parts:
931    
932      1. CellsBasis : CELLS_BASIS
933    
934            CellsBasis is a top level structure and common for all
935            architectures.  it contains the definitions of basic datatypes
936            and utility  functions over these types.
937    
938      2. functor Cells() : CELLS
939    
940            Cells generates an interface for CELLS that incorporates the
941            specific resources on the target architecture, such as the
942            presence of special register classes, their number and size,
943            and various useful substructures.
944    
945      3. <ARCH>CELLS
946    
947            e.g. SparcCells: SPARCCELLS
948    
949            <ARCH>CELLS usually contains additional bindings for special
950            registers  on the architecture, such as:
951    
952                    val r0 : cell           (* register zero *)
953                    val y : cell            (* Y register *)
954                    val psr : cell          (* processor status register *)
955                    ...
956    
957            The structure returned by applying the Cells functor is opened
958            in this interface.
959    
960    The main implication of all this is that the datatypes for cells is
961    split between CellsBasis and CELLS -- a fairly simple change for user
962    code.
963    
964    In the old scheme the CELLS interface had a definitional binding of
965    the form:
966    
967            signature CELLS = sig
968    
969               structure CellsBasis = CellsBasis
970    
971               ...
972    
973            end
974    
975    With all the sharing constraints that goes on in MLRISC, this old
976    design  quickly leads to errors such as:
977    
978            "structure definition spec inside of sharing ... "
979    
980    
981    and appears to require an unacceptable amount of sharing and where
982    constraint hackery.
983    
984    I think this error message (the interaction of definitional specs and
985    sharing) requires more explanation on our web page.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/07/19 15:00:00 EDT
990    Tag: blume-20010719-libreorg
991    Description:
992    
993    This update puts together a fairly extensive but straightforward change
994    to the way the libraries that implement the interactive system are
995    organized:
996    
997       The biggest change is the elimination of structure Compiler.  As a
998       replacement for this structure, there is now a CM library
999       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1000       that exports all the substructures of the original structure Compiler
1001       directly.  So instead of saying Compiler.Foo.bar one now simply
1002       says Foo.bar.  (The CM libraries actually export a collection of
1003       structures that is richer than the collection of substructures of
1004       structure Compiler.)
1005    
1006       To make the transition smooth, there is a separate library called
1007       $smlnj/compiler/compiler.cm which puts together and exports the
1008       original structure Compiler (or at least something very close to it).
1009    
1010       There are five members of the original structure Compiler
1011       that are not exported directly but which instead became members
1012       of a new structure Backend (described by signature BACKEND).  These are:
1013       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1014       Interact (: INTERACT), structure Machine (: MACHINE), and val
1015       architecture (: string).
1016    
1017       Structure Compiler.Version has become structure CompilerVersion.
1018    
1019       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1020       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1021       or x86, respectively.
1022       Each of these exports the same frontend structures that
1023       $smlnj/compiler.cm exports.  But they do not have a structure Backend
1024       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1025       Hppa, PPC, Sparc, or X86, respectively.
1026    
1027       Library $smlnj/compiler/all.cm exports the union of the exports of
1028       $smlnj/compiler/<arch>.cm
1029    
1030       There are no structures <Arch>Compiler anymore, use
1031       $smlnj/compiler/<arch>.cm instead.
1032    
1033       Library host-compiler-0.cm is gone.  Instead, the internal library
1034       that instantiates CM is now called cm0.cm.  Selection of the host
1035       compiler (backend) is no longer done here but. (Responsibility for it
1036       now lies with $smlnj/compiler/current.cm.  This seems to be more
1037       logical.)
1038    
1039       Many individual files have been moved or renamed.  Some files have
1040       been split into multiple files, and some "dead" files have been deleted.
1041    
1042    Aside from these changes to library organization, there are also changes
1043    to the way the code itself is organized:
1044    
1045       Structure Binfile has been re-implemented in such a way that it no
1046       longer needs any knowledge of the compiler.  It exclusively deals
1047       with the details of binfile layout.  It no longer invokes the
1048       compiler (for the purpose of creating new prospective binfile
1049       content), and it no longer has any knowledge of how to interpret
1050       pickles.
1051    
1052       Structure Compile (: COMPILE) has been stripped down to the bare
1053       essentials of compilation.  It no longer deals with linking/execution.
1054       The interface has been cleaned up considerably.
1055    
1056       Utility routines for dealing with linking and execution have been
1057       moved into their own substructures.
1058    
1059       (The ultimate goal of these changes is to provide a light-weight
1060       binfile loader/linker (at least for, e.g., stable libraries) that
1061       does not require CM or the compiler to be present.)
1062    
1063    CM documentation has been updated to reflect the changes to library
1064    organization.
1065    
1066    ----------------------------------------------------------------------
1067    Name: Matthias Blume
1068    Date: 2001/07/10 17:30:00 EDT
1069    Tag: Release_110_34
1070    Description:
1071    
1072    Minor tweak to 110.34 (re-tagged):
1073    
1074      - README.html file added to CVS repository
1075      - runtime compiles properly under FreeBSD 3.X and 4.X
1076    
1077    ----------------------------------------------------------------------
1078    Name: Matthias Blume
1079    Date: 2001/07/10 17:30:00 EDT
1080    Tag: Release_110_34
1081    Description:
1082    
1083    New version number (110.34). New bootfiles.
1084    
1085    ----------------------------------------------------------------------
1086    Name: Matthias Blume
1087    Date: 2001/07/09 16:00:00 EDT
1088    Tag: blume-20010709-more-varargs
1089    Description:
1090    
1091    I changed the handling of varargs in ml-nlffigen again:
1092    The ellipsis ... will now simply be ignored (with an accompanying warning).
1093    
1094    The immediate effect is that you can actually call a varargs function
1095    from ML -- but you can't actually supply any arguments beyond the ones
1096    specified explicitly.  (For example, you can call printf with its format
1097    string, but you cannot pass additional arguments.)
1098    
1099    This behavior is only marginally more useful than the one before, but
1100    it has the advantage that a function or, more importantly, a function
1101    type never gets dropped on the floor, thus avoiding follow-up problems with
1102    other types that refer to the offending one.
1103    
1104    ----------------------------------------------------------------------
1105    Name: Matthias Blume
1106    Date: 2001/07/09 11:25:00 EDT
1107    Tag: blume-20010709-varargs
1108    Description:
1109    
1110    1. ckit-lib.cm now exports structure Error
1111    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1112       with a warning accompanied by a source location.  Moreover, it
1113       merely skips the offending function or type and proceeds with the
1114       rest of its work.u  As a result, one can safely feed C code containing
1115       "..." to ml-nlffigen.
1116    3. There are some internal improvements to CM, providing slightly
1117       more general string substitutions in the tools subsystem.
1118    
1119    ----------------------------------------------------------------------
1120    Name: Matthias Blume
1121    Date: 2001/06/27 15:10:00 EDT
1122    Tag: blume-20010627-concur
1123    Description:
1124    
1125    Fixed a small bug in CM's handling of parallel compilation.
1126    (You could observe the bug by Control-C-interrupting an ordinary
1127    CMB.make or CM.stabilize and then attaching some compile servers.
1128    The result was that all of a sudden the previously interrupted
1129    compilation would continue on its own.  This was because of
1130    an over-optimization: CM did not bother to clean out certain queues
1131    when no servers were attached "anyway", resulting in the contents
1132    of these queues to grab control when new servers did get attached.)
1133    
1134    There is also another minor update to the CM manual.
1135    
1136    ----------------------------------------------------------------------
1137    Name: Matthias Blume
1138    Date: 2001/06/26 16:15:00 EDT
1139    Tag: blume-20010626-cmdoc
1140    Description:
1141    
1142    Minor typo fixed in CM manual (syntax diagram for libraries).
1143    
1144    ----------------------------------------------------------------------
1145    Name: Matthias Blume
1146    Date: 2001/06/25 22:55:00 EDT
1147    Tag: blume-20010625-x86pc
1148    Description:
1149    
1150    Fixed a nasty bug in the X86 assembly code that caused signal
1151    handlers to fail (crash) randomly.
1152    
1153    ----------------------------------------------------------------------
1154    Name: Matthias Blume
1155    Date: 2001/06/25 12:05:00 EDT
1156    Tag: blume-20010625-nlffigen
1157    Description:
1158    
1159    This update fixes a number of minor bugs in ml-nlffigen as reported by
1160    Nick Carter <nbc@andrew.cmu.edu>.
1161    
1162      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1163      2. Default names for generated files are now derived from the name of
1164         the C file *without its directory*.  In particular, this causes generated
1165         files to be placed locally even if the C file is in some system directory.
1166      3. Default names for generated signatures and structures are also derived
1167         from the C file name without its directory.  This avoids silly things
1168         like "structure GL/GL".
1169         (Other silly names are still possible because ml-nlffigen does not do
1170          a thorough check of whether generated names are legal ML identifiers.
1171          When in doubt, use command line arguments to force particular names.)
1172    
1173    ----------------------------------------------------------------------
1174    Name: Matthias Blume
1175    Date: 2001/06/21 12:25:00 EDT
1176    Tag: blume-20010621-eXene
1177    Description:
1178    
1179    eXene now compiles and (sort of) works again.
1180    
1181    The library name (for version > 110.33) is $/eXene.cm.
1182    
1183    I also added an new example in src/eXene/examples/nbody.  See the
1184    README file there for details.
1185    
1186    ----------------------------------------------------------------------
1187    Name: Matthias Blume
1188    Date: 2001/06/20 16:40:00 EDT
1189    Tag: blume-20010620-cml
1190    Description:
1191    
1192    CML now compiles and works again.
1193    
1194    Libraries (for version > 110.33):
1195    
1196      $cml/cml.cm            Main CML library.
1197      $cml/basis.cm          CML's version of $/basis.cm.
1198      $cml/cml-internal.cm   Internal helper library.
1199      $cml/core-cml.cm       Internal helper library.
1200      $cml-lib/trace-cml.cm  Tracing facility.
1201      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1202    
1203    The installer (config/install.sh) has been taught how to properly
1204    install this stuff.
1205    
1206    ----------------------------------------------------------------------
1207    Name: Matthias Blume
1208    Date: 2001/06/19 17:55:00 EDT
1209    Tag: blume-20010619-instantiate
1210    Description:
1211    
1212    This un-breaks the fix for bug 1432.
1213    (The bug was originally fixed in 110.9 but I broke it again some
1214    time after that.)
1215    
1216    ----------------------------------------------------------------------
1217    Name: Matthias Blume
1218    Date: 2001/06/19 17:25:00 EDT
1219    Tag: blume-20010619-signals
1220    Description:
1221    
1222    This should (hopefully) fix the long-standing signal handling bug.
1223    (The runtime system was constructing a continuation record with an
1224    incorrect descriptor which would cause the GC to drop data on the floor...)
1225    
1226    ----------------------------------------------------------------------
1227    Name: Matthias Blume
1228    Date: 2001/06/15 15:05:00 EDT
1229    Tag: blume-20010615-moresparc
1230    Description:
1231    
1232    Here is a short late-hour update related to Sparc c-calls:
1233    
1234     -- made handling of double-word arguments a bit smarter
1235    
1236     -- instruction selection phase tries to collapse certain clumsily
1237        constructed ML-Trees; typical example:
1238    
1239            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1240    
1241        This currently has no further impact on SML/NJ since mlriscGen does
1242        not seem to generate such patterns in the first place, and c-calls
1243        (which did generate them in the beginning) has meanwhile been fixed
1244        so as to avoid them as well.
1245    
1246    ----------------------------------------------------------------------
1247    Name: Matthias Blume
1248    Date: 2001/06/15 15:05:00 EDT
1249    Tag: blume-20010615-sparc
1250    Description:
1251    
1252    The purpose of this update is to provide an implementation of NLFFI
1253    on Sparc machines.
1254    
1255    Here are the changes in detail:
1256    
1257       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1258       the Sparc implementation of the c-calls API.
1259       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1260       for accessing the ML frame.  Thus, we have a real frame pointer and
1261       can freely modify %sp without need for an omit-frame-ptr phase.
1262       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1263       this case.
1264       * ml-nlffigen has been taught to produce code for different architectures
1265       and calling conventions.
1266       * In a way similar to what was done in the x86 case, the Sparc
1267       backend uses its own specific extension to mltree.  (For example,
1268       it needs to be able to generate UNIMP instructions which are part
1269       of the calling convention.)
1270       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1271       to make it easier to plug in new machine- and os-dependent parts).
1272    
1273    There are some other fairly unrelated bug fixes and cleanups as well:
1274    
1275       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1276       that they properly share their libraries with existing SML/NJ libraries.
1277       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1278       follow-up error messages.
1279       * Updates to CM/CMB documentation.
1280    
1281    TODO items:
1282    
1283       * MLRISC should use a different register as its asmTemp on the Sparc.
1284         (The current %o2 is a really bad choice because it is part of the
1285         calling conventions, so things might interfere in unexpected ways.)
1286    
1287    ----------------------------------------------------------------------
1288    Name: Matthias Blume
1289    Date: 2001/06/07
1290    Tag: blume-20010607-calls
1291    Description:
1292    
1293    A number of internal changes related to C calls and calling conventions:
1294    
1295    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1296       number of bytes popped implicitly (by the callee).  In most cases
1297       this field is 0 but on x86/win32 it is some non-zero value.  This
1298       is information provided for the benefit of the "omit-frameptr" pass.
1299    2. The CALL instruction on the x86 carries a similar "pops" field.
1300       The instruction selection phase copies its value from the ML-Tree
1301       CALL statement.
1302    3. On all other architectures, the instruction selection phase checks
1303       whether "pops=0" and complains if not.
1304    4. The c-calls implementation for x86 now accepts two calling conventions:
1305       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1306       up after the call and pops is set to 0.  For "stdcall", the caller
1307       does nothing, leaving the cleanup to the callee; pops is set to
1308       the number of bytes that were pushed onto the stack.
1309    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1310       distinguish between "ccall" and "stdcall".
1311    6. The UNIMP instruction has been added to the supported Sparc instruction
1312       set. (This is needed for implementing the official C calling convention
1313       on this architecture.)
1314    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1315       work with the latest CM.
1316    
1317    ----------------------------------------------------------------------
1318    Name: Matthias Blume
1319    Date: 2001/06/05 15:10:00 EDT
1320    Tag: blume-20010605-cm-index
1321    Description:
1322    
1323    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1324    
1325    1. CM can now generate "index files".  These are human-readable files
1326       that list on a per-.cm-file basis each toplevel symbol defined or
1327       imported.  The location of the index file for
1328       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1329       To enable index-file generation, set CM.Control.generate_index to true
1330       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1331    
1332       The CM manual has been updated accordingly.
1333    
1334    2. I made some slight modifications to the c-calls API in MLRISC.
1335    
1336         a) There is now a callback to support saving/restoring of
1337            dedicated but caller-save registers around the actual call
1338            instruction.
1339         b) One can optionally specify a comment-annotation for the
1340            call instruction.
1341    
1342    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1343       (For example, the comment annotation shows the C prototype of
1344        the function being called.)
1345    
1346    ----------------------------------------------------------------------
1347    Name: Matthias Blume
1348    Date: 2001/06/01 13:30:00 EDT
1349    Tag: blume-20010601-nlffi-cleanup
1350    Description:
1351    
1352    This is mostly a cleanup of MLFFI stuff:
1353    
1354       - some signature files have been put into a more exposed place
1355       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1356       - ml-nlffigen changed accordingly
1357       - tutorial updated
1358    
1359    Other changes:
1360    
1361       - author's affiliation in CM manual(s) updated
1362       - some more recognized keywords added to Allen's sml.sty
1363    
1364    ----------------------------------------------------------------------
1365    Name: Matthias Blume
1366    Date: 2001/05/25 15:30:00 EDT
1367    Tag: blume-20010525-iptr
1368    Description:
1369    
1370      - put the official 110.33-README (as it appears on the ftp server) under
1371        CVS
1372      - fixed a small bug related to incomplete pointer types in
1373        ml-nlffigen
1374      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1375        (it does not need the 'f type parameter)
1376    
1377    ----------------------------------------------------------------------
1378    Name: Matthias Blume
1379    Date: 2001/05/23 14:30:00 EDT
1380    Tag: Release_110_33
1381    Description:
1382    
1383    New version number (110.33).  New bootfiles.
1384    
1385    ----------------------------------------------------------------------
1386    Name: Matthias Blume
1387    Date: 2001/05/22 18:06:00 EDT
1388    Tag: blume-20010522-targets
1389    Description:
1390    
1391    Made install.sh use file config/targets.customized if it exists, falling
1392    back to config/targets if it doesn't.  This way one can have a customized
1393    version of the targets file without touching the "real thing", thus
1394    eliminating the constant fear of accidentally checking something bogus
1395    back into the CVS repository...  (File config/targets.customized must
1396    not be added to the repository!)
1397    
1398    ----------------------------------------------------------------------
1399    Name: Matthias Blume
1400    Date: 2001/05/22 16:30:00 EDT
1401    Tag: blume-20010522-minitut
1402    Description:
1403    
1404    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1405       struct returns.
1406    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1407       incomplete, preliminary documentation for NLFFI.
1408    
1409    ----------------------------------------------------------------------
1410    Name: Matthias Blume
1411    Date: 2001/05/14 11:30:00 EDT
1412    Tag: blume-20010514-script
1413    Description:
1414    
1415    Some bugs in install script fixed.
1416    
1417    In addition to that I also made a slight change to the NLFFI API:
1418    Functors generated by ml-nlffigen now take the dynamic library as a
1419    straight functor argument, not as a suspended one.  (The original
1420    functor code used to force the suspension right away anyway, so there
1421    was nothing gained by this complication of the interface.)
1422    
1423    ----------------------------------------------------------------------
1424    Name: Matthias Blume
1425    Date: 2001/05/11 14:35:00 EDT
1426    Tag: blume-20010511-ml-nlffi
1427    Description:
1428    
1429    I finally took the plunge and added my new FFI code to the main
1430    repository.  For x86-linux it is now ready for prime-time.
1431    
1432    There are two new subdirectories of "src":
1433    
1434      - ml-nlffi-lib:
1435           The utility library for programs using the FFI interface.
1436           Here is the implementation of $/c.cm and its associated low-level
1437           partners $/c-int.cm and $/memory.cm.
1438      - ml-nlffigen:
1439           A stand-alone program for generating ML glue code from C source
1440           code.
1441    
1442    Building ml-nlffigen requires $/ckit-lib.cm.
1443    
1444    The config/install.sh script has been updates to do the Right Thing
1445    (hopefully).
1446    
1447    Notice that the source tree for the C-Kit will not be put under "src"
1448    but directly under the installation root directory.  (This is the
1449    structure that currently exists on the CVS server when you check out
1450    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1451    
1452    Bugs: No documentation yet.
1453    
1454    ----------------------------------------------------------------------
1455    Name: Matthias Blume
1456    Date: 2001/05/09 16:35:00 EDT
1457    Tag: blume-20010509-cpscontract
1458    Description:
1459    
1460    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1461    wrapper/unwrapper elimination did not decrement usage counts and some
1462    dead variables got overlooked by the dead-up logic.)
1463    
1464    ----------------------------------------------------------------------
1465    Name: Lal George
1466    Date: 2001/05/08  17:26:09 EDT
1467    Tag: george-20010508-omit-frameptr
1468    Description:
1469    
1470    Changes to implement the omit-frame-pointer optimization to support
1471    raw C calls. For now, there is only support on the Intel x86, but
1472    other architectures will follow as more experience is gained with this.
1473    
1474    
1475    ----------------------------------------------------------------------
1476    Name: Matthias Blume
1477    Date: 2001/05/07 14:40:00 EDT
1478    Tag: blume-20010507-proxies
1479    Description:
1480    
1481    I made into "proxy libraries" all libraries that qualify for such a
1482    change.  (A qualifying library is a library that has another library or
1483    groups as its sole member and repeats that member's export list
1484    verbatim.  A proxy library avoids this repetition by omitting its export
1485    list, effectively inheriting the list that its (only) member exports.
1486    See the CM manual for more explanation.)
1487    The main effect is that explicit export lists for these libraries
1488    do not have to be kepts in sync, making maintenance a bit easier.
1489    
1490    I also added copyright notices to many .cm-files.
1491    
1492    Last but not least, I made a new set of bootfiles.
1493    
1494    ----------------------------------------------------------------------
1495    Name: Matthias Blume
1496    Date: 2001/05/04 17:00:00 EDT
1497    Tag: blume-20010504-cm-lsplit
1498    Description:
1499    
1500    0. John merged pending changes to $/smlnj-lib.cm
1501    
1502    1. Allen's previous change accidentally backed out of one of Lal's
1503       earlier changes.  I undid this mistake (re-introducing Lal's change).
1504    
1505    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1506       within the compiler where applicable.  There is some code simplification
1507       because of that.
1508    
1509    3. The "split" phase (in FLINT) is now part of the default list of phases.
1510       Compiler.Control.LambdaSplitting.* can be used to globally control the
1511       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1512       it can now also be controlled on a per-source basis: CM has been taught
1513       a new tool parameter applicable to ML source files.
1514    
1515       - To turn lambda-splitting off completely:
1516            local open Compiler.Control.LambdaSplitting in
1517                val _ = set Off
1518            end
1519       - To make "no lambda-splitting" the global default (but allow per-source
1520         overriding); this is the initial setting:
1521            local open Compiler.Control.LambdaSplitting in
1522                val _ = set (Default NONE)
1523            end
1524       - To make "lambda-splitting with aggressiveness a" the global default
1525         (and allow per-source overriding):
1526            local open Compiler.Control.LambdaSplitting in
1527                val _ = set (Default (SOME a))
1528            end
1529    
1530       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1531         write (in the respective .cm-file):
1532            a.sml (lambdasplitting:off)
1533       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1534            a.sml (lambdasplitting:on)
1535       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1536         <a> is a decimal non-negative integer):
1537            a.sml (lambdasplitting:<a>)
1538       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1539            a.sml (lambdasplitting:infinity)
1540       - To use the global default for a.sml:
1541            a.sml (lambdasplitting:default)
1542         or simply
1543            a.sml
1544    
1545    ----------------------------------------------------------------------
1546    Name: Allen Leung
1547    Date: 2001/05/04 01:57:00 EDT
1548    Tag: leunga-20010504-sync
1549    Description:
1550    
1551      MLRISC features.
1552    
1553      1. Fix to CMPXCHG instructions.
1554      2. Changed RA interface to allow annotations in callbacks.
1555      3. Added a new method to the stream interface to allow annotations updates.
1556    
1557    ----------------------------------------------------------------------
1558    Name: Matthias Blume
1559    Date: 2001/05/01 11:45:00 EDT
1560    Tag: blume-20010501-pcedittmp
1561    Description:
1562    
1563    Changed install.sh to use the current working directory instead of
1564    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1565    of /usr/tmp caused trouble with MacOS X because of file premission
1566    problems.
1567    
1568    ----------------------------------------------------------------------
1569    Name: Matthias Blume
1570    Date: 2001/04/20 11:10:00 EDT
1571    Tag: blume-20010420-inMLflag
1572    Description:
1573    
1574     - added vp_limitPtrMask to vproc-state.h
1575       (for use by the raw-C-calls mechanism to implement proper interrupt
1576        handling)
1577     - made the ML compiler aware of various data-structure offsets so it
1578       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1579     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1580       raw C-calls
1581    
1582    ----------------------------------------------------------------------
1583    Name: Lal George
1584    Date: 2001/04/20 09:15:28 EDT
1585    Tag: george-20010420-macosX
1586    Description:
1587    
1588     - Changes to port to Mac OS X; Darwin.
1589    
1590     - In the process I found that sqrt was broken on the PPC, because the
1591       fsqrt instruction is not implemented.
1592    
1593    ----------------------------------------------------------------------
1594    Name: Matthias Blume
1595    Date: 2001/04/18 12:45:00 EDT
1596    Tag: blume-20010418-ccalls
1597    Description:
1598    
1599     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1600       (this bug prevented structure arguments containing pointers from being
1601        passed correctly)
1602     - changed the raw-C-call code in mlriscGen.sml in such a way that
1603       structure arguments are represented as a pointer to the beginning
1604       of the structure (instead of having a series of synthesized arguments,
1605       one for each structure member)
1606    
1607     - made makeml script's verbosity level configurable via environment
1608       variable (MAKEML_VERBOSITY)
1609    
1610     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1611       in rawmem-x86.sml; we are now using the real thing
1612    
1613    ----------------------------------------------------------------------
1614    Name: Matthias Blume
1615    Date: 2001/03/22 16:25:00 EST
1616    Tag: blume-20010322-bootfiles
1617    Description:
1618    
1619    Created a new set of bootfiles (for your automatic installation convenience).
1620    
1621    ----------------------------------------------------------------------
1622    Name: Matthias Blume
1623    Date: 2001/03/22 15:10:00 EST
1624    Tag: blume-20010322-rawmem-parcm
1625    Description:
1626    
1627    1. All "raw memory access" primitives for the new FFI are implemented now
1628       (at least on the x86).
1629    2. Some further cleanup of CM's parallel make mechanism.
1630    
1631    ----------------------------------------------------------------------
1632    Name: Matthias Blume
1633    Date: 2001/03/19 17:53:00 EST
1634    Tag: blume-20010319-parallel
1635    Description:
1636    
1637    Parallel make (using compile servers) now works again.
1638    
1639    To this end, CM.stabilize and CMB.make have been modified to work in
1640    two passes when compile servers are attached:
1641       1. Compile everything, do not perform stabilization; this pass
1642          uses compile servers
1643       2. Stabilize everything; this pass does not use compile servers
1644    If there are no compile servers, the two passes are combined into one
1645    (as before).  Splitting the passes increases the inherent parallelism
1646    in the dependency graph because the entire graph including all
1647    libraries is available at the same time.  This, in turn, improves
1648    server utilization.  The downside is that the master process will
1649    have to do some extra work after compilation is done (because for
1650    technical reasons it must re-read all the binfiles during stabilization).
1651    
1652    ----------------------------------------------------------------------
1653    Name: Matthias Blume
1654    Date: 2001/03/16 12:22:00 EST
1655    Tag: blume-20010316-bootfiles
1656    Description:
1657    
1658    Created a new set of bootfiles (for your automatic installation convenience).
1659    
1660    ----------------------------------------------------------------------
1661    Name: Matthias Blume
1662    Date: 2001/03/16 11:00:00 EST
1663    Tag: blume-20010316-MLTREE-fixup
1664    Description:
1665    
1666    This is a minor fixup for an (untagged) earlier commit by Allen.
1667    (A file was missing).
1668    
1669    ----------------------------------------------------------------------
1670    Name: Allen Leung
1671    Date: Mon Mar  5 18:54:57 EST 2001
1672    Tag: leunga-20010305-cut-support
1673    
1674    1. New support for alternative control-flow in MLTREE.
1675       Currently we support
1676    
1677          FLOW_TO(CALL ...., [k1,...,kn])
1678    
1679       This is needed for 'cuts to' in C-- and try/handle-like constructs
1680       in Moby
1681    
1682       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1683    
1684    2. Register Allocator
1685    
1686       Changes in interface [from Fermin, John]
1687    
1688    3. Alpha 8-bit SLL support [Fermin]
1689    
1690    4. All architectures
1691    
1692       A new module (ClusterExpandCopies) for expanding parallel copies.
1693    
1694    ----------------------------------------------------------------------
1695    Name: Allen Leung
1696    Date: 2001/02/27 23:07:00 EST
1697    Tag: leunga-20010227-minor-stuff
1698    
1699    1. Alpha bug fix for CMOVNE
1700    2. Handle mltree COND(..,FCMP ...,...)
1701    3. Bug fix in simplifier
1702    
1703    ----------------------------------------------------------------------
1704    Name: Matthias Blume
1705    Date: 2001/01/30 17:50:00 EST
1706    Tag: blume-20010130-sync
1707    Description:
1708    
1709    This is just a minor update to sync my devel branch with the main brach.
1710    The only visible change is the addition of some README files.
1711    
1712    ----------------------------------------------------------------------
1713    Name: Matthias Blume
1714    Date: 2001/01/12 23:30:00 JST
1715    Tag: blume-20010112-bootfiles
1716    Description:
1717    
1718    Made a new set of bootfiles that goes with the current state of the
1719    repository.
1720    
1721    ----------------------------------------------------------------------
1722    Name: Matthias Blume
1723    Date: 2001/01/12 21:20:00 JST
1724    Tag: blume-20010112-sync
1725    Description:
1726    
1727    I am just flushing out some minor changes that had accumulated in
1728    my private branch in order to sync with the main tree.  (This is
1729    mainly because I had CVS trouble when trying to merge _into_ my
1730    private branch.)
1731    
1732    Most people should be completely unaffected by this.
1733    
1734    ----------------------------------------------------------------------
1735    Name: Allen Leung
1736    Date: Thu Jan 11 21:03:00 EST 2001
1737    Tag: leunga-20010111-labexp=mltree
1738    Description:
1739    
1740    1.  Removed the type LabelExp and replace it by MLTree.
1741    2.  Rewritten mltree-simplify with the pattern matcher tool.
1742    3.  There were some bugs in alpha code generator which would break
1743        64-bit code generation.
1744    4.  Redo the tools to generate code with the
1745    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1746        are now generated by perl scripts.
1747    
1748    ----------------------------------------------------------------------
1749    Name: Matthias Blume
1750    Date: 2001/01/10 21:55:00 JST
1751    Tag: blume-20010110-rcc
1752    Description:
1753    
1754    The RCC stuff now seems to work (but only on the x86).
1755    This required hacking of the c-calls interface (and -implementation) in
1756    MLRISC.
1757    
1758    Normal compiler users should be unaffected.
1759    
1760    ----------------------------------------------------------------------
1761    Name: Matthias Blume
1762    Date: 2001/01/09 01:20:00 JST
1763    Tag: blume-20010109-rcc
1764    Description:
1765    
1766    This is a fairly big patch, flushing out a large number of pending
1767    changes that I made to my development copy over the last couple of days.
1768    
1769    Of practical relevance at this moment is a workaround for a pickling
1770    bug that Allen ran into the other day.  The cause of the bug itself is
1771    still unknown and it might be hard to fix it properly, but the
1772    workaround has some merits of its own (namely somewhat reducing pickling
1773    overhead for certain libraries).  Therefore, I think this solution should
1774    be satisfactory at this time.
1775    
1776    The rest of the changes (i.e., the vast majority) has to do with my
1777    ongoing efforts of providing direct support for C function calls from
1778    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1779    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1780    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1781    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1782    handle RCC.
1783    
1784    The last part (the changes to mlriscGen.sml) are still known to be
1785    wrong on the x86 and not implemented on all other architectures.  But
1786    the infrastructure is in place. I had to change a few functor
1787    signatures in the backend to be able to route the CCalls interface
1788    from MLRISC there, and I had to specialize the mltree type (on the
1789    x86) to include the necessary extensions. (The extensions themselves
1790    were already there and redy to go in MLRISC/x86).
1791    
1792    Everything should be very happy as soon as someone helps me with
1793    mlriscGen.sml...
1794    
1795    In any case, nothing of this should matter to anyone as long as the
1796    new primop is not being used (which is going to be the case unless you
1797    find it where I hid it :). The rest of the compiler is completely
1798    unaffected.
1799    
1800    ----------------------------------------------------------------------
1801    Name: Matthias Blume
1802    Date: 2001/01/05 00:30:00 JST
1803    Tag: blume-20010105-primops
1804    Description:
1805    
1806    Added some experimental support for work that I am doing right now.
1807    These changes mostly concern added primops, but there is also a new
1808    experimental C library in the runtime system (but currently not enabled
1809    anywhere except on Linux/X86).
1810    
1811    In the course of adding primops (and playing with them), I discovered that
1812    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1813    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1814    To recover, I made type information in INL_PRIM mandatory and changed
1815    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1816    has complete, correct type information (i.e., no bottom types).
1817    
1818    Since all these changes mean that we need new binfiles, I also bumped the
1819    version number to 110.32.1.
1820    
1821    ----------------------------------------------------------------------
1822    Name: Matthias Blume
1823    Date: 2000/12/30 22:10:00 JST
1824    Tag: blume-20001230-various
1825    Description:
1826    
1827    Added proxy libraries for MLRISC and let MLRISC libraries refer
1828    to each other using path anchors.  (See CM manual for explanation.)
1829    
1830    Updated CM documentation.
1831    
1832    Fixed some bugs in CM.
1833    
1834    Implemented "proxy" libraries (= syntactic sugar for CM).
1835    
1836    Added "-quiet" option to makeml and changed runtime system accordingly.
1837    
1838    Added cleanup handler for exportML to reset timers and compiler stats.
1839    
1840    ----------------------------------------------------------------------
1841    Name: Lal George
1842    Date: 2000/12/22 22:22:58 EST 2000
1843    Tag: Release_110_32
1844    Description:
1845    
1846            Infinite precision used throughout MLRISC.
1847            see MLRISC/mltree/machine-int.sig
1848    
1849    ----------------------------------------------------------------------
1850    Name: Matthias Blume
1851    Date: 2000/12/22 23:16:00 JST
1852    Tag: blume-20001222-warn
1853    Description:
1854    
1855    Corrected wording and formatting of some CM warning message which I
1856    broke in my previous patch.
1857    
1858    ----------------------------------------------------------------------
1859    Name: Matthias Blume
1860    Date: 2000/12/22 21:20:00 JST
1861    Tag: blume-20001222-anchorenv
1862    Description:
1863    
1864    Fixed CM's handling of anchor environments in connection with CMB.make.
1865    
1866    ----------------------------------------------------------------------
1867    Name: Matthias Blume
1868    Date: 2000/12/22 13:15:00 JST
1869    Tag: blume-20001222-cleanup
1870    Description:
1871    
1872    Removed src/cm/ffi which does not (and did not) belong here.
1873    
1874    ----------------------------------------------------------------------
1875    Name: Matthias Blume
1876    Date: 2000/12/21 23:55:00 JST
1877    Tag: blume-20001221-exn
1878    Description:
1879    
1880    Probably most important: CM no longer silently swallows all exceptions
1881    in the compiler.
1882    Plus: some other minor CM changes.  For example, CM now reports some
1883    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1884    
1885  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1886  Name: Matthias Blume  Name: Matthias Blume
1887  Date: 2000/12/15 00:01:05 JST  Date: 2000/12/15 00:01:05 JST
# Line 1769  Line 3640 
3640       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3641       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3642       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
3643       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3644       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3645       Dave's hands. :)       Dave's hands. :)
3646    

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