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revision 841, Fri Jun 15 21:38:20 2001 UTC revision 1054, Wed Feb 6 19:27:27 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. Pulled 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  Name: Matthias Blume
1214  Date: 2001/06/15 15:05:00 EDT  Date: 2001/06/15 15:05:00 EDT
1215  Tag: blume-20010615-moresparc  Tag: blume-20010615-moresparc
# Line 2429  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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