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Diff of /sml/trunk/HISTORY

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revision 972, Sun Oct 28 00:37:02 2001 UTC revision 1063, Wed Feb 13 21:41:53 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2002/02/13 16:41:00 EST
18    Tag: blume-20020213-cmlpq
19    Description:
20    
21    Added new priority queue export symbols (which have just been added to
22    smlnj-lib.cm) to CML's version of smlnj-lib.cm.  (Otherwise CML would
23    not compile and the installer would choke.)
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume
27    Date: 2002/02/13 16:15:00 EST
28    Tag: blume-20020213-various
29    Description:
30    
31    1. More tweaks to ml-nlffigen:
32    
33       - better internal datastructures (resulting in slight speedup)
34       - "-match" option requires exact match
35       - "localized" gensym counters (untagged structs/unions nested within
36         other structs/unions or within typedefs get a fresh counter; their
37         tag will be prefixed by a concatenation of their parents' tags)
38       - bug fixes (related to calculation of transitive closure of types
39         to be included in the output)
40    
41    2. Minor Basis updates:
42    
43       - added implementations for List.collate and Option.app
44    
45    ----------------------------------------------------------------------
46    Name: Matthias Blume
47    Date: 2002/02/11 15:55:00 EST
48    Tag: blume-20020211-gensym
49    Description:
50    
51    Added a "-gensym" option to command line of ml-nlffigen.  This can be
52    used to specify a "stem" -- a string that is inserted in all "gensym'd"
53    names (ML structure names that correspond to unnamed C structs, unions,
54    and enums), so that separate runs of ml-nlffigen do not clash.
55    
56    ----------------------------------------------------------------------
57    Name: Matthias Blume
58    Date: 2002/02/11 12:05:00 EST
59    Tag: blume-20020211-gensml
60    Description:
61    
62    A quick fix for a problem with GenSML (in the pgraph-util library):
63    Make generation of toplevel "local" optional.  (Strictly speaking,
64    signature definitions within "local" are not legal SML.)
65    
66    Other than that: updates to INSTALL and cm/TODO.
67    
68    ----------------------------------------------------------------------
69    Name: Matthias Blume
70    Date: 2002/02/08 15:00:00 EST
71    Tag: blume-20020208-uniquepid
72    Description:
73    
74    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
75    
76    1. The installer (config/install.sh) has gotten smarter:
77    
78         - Configuration options are a bit easier to specify now
79           (in config/targets).
80         - Bug in recognizing .tar.bz2 files fixed.
81         - Installer automatically resolves dependencies between
82           configuration options (e.g., if you ask for eXene, you will
83           also get cml -- regardless whether you asked for it or not).
84         - Installer can run in "quieter mode" by setting the environment
85           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
86           "completely silent", though.
87         - Build HashCons library as part of smlnj-lib.
88    
89    2. A new scheme for assigning persistent identifiers to compilation
90       units (and, by extension, to types etc.) has been put into place.
91       This fixes a long-standing bug where types and even dynamic values
92       can get internally confused, thereby compromising type safety
93       (abstraction) and dynamic correctness.  See
94    
95         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
96    
97       for an example of how things could go wrong until now.
98    
99       The downside of the new scheme is that pids are not quite as
100       persistent as they used to be: CM will generate a fresh pid
101       for every compilation unit that it thinks it sees for the first
102       time.  That means that if you compile starting from a clean, fresh
103       source tree at two different times, you end up with different
104       binaries.
105    
106       Cutoff recompilation, however, has not been compromised because
107       CM keeps pid information in special caches between runs.
108    
109    ----------------------------------------------------------------------
110    Name: Lal George
111    Date: 2002/02/07 15:34:13 EST 2002
112    Tag: <none>
113    Description:
114    
115    Compilers that generate assembly code may produce  global labels
116    whose value is resolved at link time. The various peephole optimization
117    modules did not take this in account.
118    
119    TODO. The Labels.addrOf function should really return an option
120    type so that clients are forced to deal with this issue, rather
121    than an exception being raised.
122    
123    ----------------------------------------------------------------------
124    Name: Lal George
125    Date: 2002/02/06 13:55:02 EST
126    Tag: george-20020206-ra-breakup
127    Description:
128    
129    1. A bug fix from Allen.
130    
131        A typo causes extra fstp %st(0)'s to be generated at compensation
132        edges, which might cause stack underflow traps at runtime.  This
133        occurs in fft where there are extraneous fstps right before the 'into'
134        trap instruction (in this case they are harmless since none of the
135        integers overflow.)
136    
137    2. Pulled out various utility modules that were embedded in the modules
138       of the register allocator. I need these modules for other purposes, but
139       they are not complete enough to put into a library (just yet).
140    ----------------------------------------------------------------------
141    Name: Matthias Blume
142    Date: 2002/01/31 16:05:00 EST
143    Tag: blume-20020131-sparc-ccalls
144    Description:
145    
146    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
147       of extra stack space by mistake.  Fixed.
148    
149    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
150    
151    ----------------------------------------------------------------------
152    Name: Allen Leung
153    Date: 2002/01/30
154    Tag: leunga-20020130-nowhere-bug-fix
155    Description:
156    
157       MLRISC bug fixes:
158       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
159       2. MachineInt.fromString was negating its value.
160    
161    ----------------------------------------------------------------------
162    Name: Matthias Blume
163    Date: 2002/01/29
164    Tag: blume-20020129-INSTALL
165    Description:
166    
167    - Added somewhat detailed installation instructions (file INSTALL).
168    - Fixed curl-detection bug in config/install.sh.
169    - It is now possible to select the URL getter using the URLGETTER
170      environment variable:
171    
172          not set / "unknown"      --> automatic detection (script tries wget,
173                                       curl, and lynx)
174          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
175                                       how to properly invoke them)
176          other                    --> use $URLGETTER directly, it must take
177                                       precisely two command-line arguments
178                                       (source URL and destination file name)
179    
180    ----------------------------------------------------------------------
181    Name: Matthias Blume
182    Date: 2002/01/28
183    Tag: blume-20020128-sparc-ccalls
184    Description:
185    
186    - Fixed problem with calculation of "used" registers in sparc-c-calls.
187    - Make use of the allocParam argument in sparc-c-calls.
188    
189    ----------------------------------------------------------------------
190    Name: Matthias Blume
191    Date: 2002/01/28
192    Tag: blume-20020128-allocParam
193    Description:
194    
195    John Reppy:  Changes c-calls API to accept client-callback for
196    allocating extra stack space.
197    me: Corresponding changes to mlriscGen (using a dummy argument that
198        does not change the current behavior).
199    
200    ----------------------------------------------------------------------
201    Name: Matthias Blume
202    Date: 2002/01/28 12:00:00
203    Tag: Release_110_38
204    Description:
205    
206    This time for real!!!
207    
208    ----------------------------------------------------------------------
209    Name: Matthias Blume
210    Date: 2002/01/28 10:56:00 EST
211    Tag: blume-20020128-retraction
212    Description:
213    
214    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
215       with blume-Release_110_38-retracted.)
216    
217    1. Fixed a problem with incorrect rounding modes in real64.sml.
218       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
219    
220    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
221       and enums fixed.  The naming of corresponding ML identifiers should
222       now be consistent again.
223    
224    ----------------------------------------------------------------------
225    Name: Allen Leung
226    Date: 2002/01/27
227    Tag: leunga-20020127-nowhere
228    Description:
229    
230       Added a target called nowhere in the configuration scripts.
231       Enabling this will build the MLRISC 'nowhere' tool (for translating
232       programs with where-clauses into legal SML code) during installation.
233    
234    ----------------------------------------------------------------------
235    Name: Matthias Blume
236    Date: 2002/01/25 21:27:00 EST
237    Tag: blume-Release_110_38-retracted
238    Description:
239    
240    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
241    
242    README will be added later.
243    
244    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
245    (Release_110_38) removed.  Reason: Last-minute bug fixes.
246    
247    ----------------------------------------------------------------------
248    Name: Matthias Blume
249    Date: 2002/01/25
250    Tag: blume-20020125-ffi
251    Description:
252    
253    A large number of tweaks and improvements to ml-nlffi-lib and
254    ml-nlffigen:
255    
256       - ML represenation types have been streamlined
257       - getter and setter functions work with concrete values, not abstract
258         ones where possible
259       - ml-nlffigen command line more flexible (see README file there)
260       - some bugs have been fixed (hopefully)
261    
262    ----------------------------------------------------------------------
263    Name: Lal George
264    Date: 2002/01/24
265    Tag: george-20020124-risc-ra-interface
266    Description:
267    
268       There is a dramatic simplification in the interface to the
269       register allocator for RISC architectures as a result of making
270       parallel copy instructions explicit.
271    
272    ----------------------------------------------------------------------
273    Name: Matthias Blume
274    Date: 2002/01/22
275    Tag: blume-20020122-x86-ccalls
276    Description:
277    
278    Bug fix for c-calls on x86 (having to do with how char- and
279    short-arguments are being handled).
280    
281    ----------------------------------------------------------------------
282    Name: Matthias Blume
283    Date: 2002/01/21
284    Tag: blume-20020121-ff
285    Description:
286    
287    Another day of fiddling with the FFI...
288    
289    1. Bug fix/workaround:  CKIT does not complain about negative array
290       dimensions, so ml-nlffigen has to guard itself against this possibility.
291       (Otherwise a negative dimension would send it into an infinite loop.)
292    
293    2. Some of the abstract types (light objects, light pointers, most "base"
294       types) in structure C are now eqtypes.
295    
296    3. Added constructors and test functions for NULL function pointers.
297    
298    ----------------------------------------------------------------------
299    Name: Matthias Blume
300    Date: 2002/01/18
301    Tag: blume-20020118-ready-for-new-release
302    Description:
303    
304    Made config/srcarchiveurl point to a new place.  (Will provide boot
305    files shortly.)
306    
307    Maybe we christen this to be 110.38?
308    
309    ----------------------------------------------------------------------
310    Name: Matthias Blume
311    Date: 2002/01/18
312    Tag: blume-20020118-more-ffifiddle
313    Description:
314    
315    Today's FFI fiddling:
316    
317      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
318        C.Set.* that use concrete (MLRep.*) arguments and results instead
319        of abstract ones.
320    
321      - Provided word-style bit operations etc. for "int" representation
322        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
323        and Long.
324    
325    ----------------------------------------------------------------------
326    Name: Matthias Blume
327    Date: 2002/01/18
328    Tag: blume-20020118-use-x86-fp
329    Description:
330    
331    Now that x86-fast-fp seems to be working, I turned it back on again
332    by default.  (Seems to work fine now, even with the FFI.)
333    
334    Other than that, I added some documentation about the FFI to
335    src/ml-nlffigen/README and updated the FFI test examples in
336    src/ml-nlffi-lib/Tests/*.
337    
338    ----------------------------------------------------------------------
339    Name: Allen Leung
340    Date: 2002/01/17
341    Tag: leunga-20020117-x86-fast-fp-call
342    Description:
343    
344       1. Fixed a problem with handling return fp values when x86's fast fp
345          mode is turned on.
346    
347       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
348          of %f32.
349    
350       3. Added a constructor INT32lit to the ast of MLRISC tools.
351    
352    ----------------------------------------------------------------------
353    Name: Matthias Blume
354    Date: 2002/01/16
355    Tag: blume-20020116-ffifiddle
356    Description:
357    
358    More fiddling with the FFI interface:
359    
360     - Make constness 'c instead of rw wherever possible.  This eliminates
361       the need for certain explicit coercions.  (However, due to ML's
362       value polymorphism, there will still be many cases where explicit
363       coercions are necessary.  Phantom types are not the whole answer
364       to modeling a subtyping relationship in ML.)
365    
366     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
367    
368     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
369       clumsy workaround for varargs problem.)
370    
371    ----------------------------------------------------------------------
372    Name: Lal George
373    Date: 2002/01/15
374    Tag: <none>
375    Description:
376    
377    1. Since COPY instructions are no longer native to the architecture,
378       a generic functor can be used to implement the expandCopies function.
379    
380    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
381       TEXT segment.
382    
383    ----------------------------------------------------------------------
384    Name: Matthias Blume
385    Date: 2002/01/15
386    Tag: blume-20020115-ffiupdates
387    Description:
388    
389    1. Fix for bug resulting in single-precision float values being returned
390       incorrectly from FFI calls.
391    
392    2. Small modifications to C FFI API:
393    
394        - memory-allocation routines return straight objects (no options)
395          and raise an exception in out-of-memory situations
396        - unsafe extensions to cast between function pointers and pointers
397          from/to ints
398        - added structure C_Debug as an alternative to structure C where
399          pointer-dereferencing (|*| and |*!) always check for null-pointers
400        - added open_lib' to DynLinkage;  open_lib' works like open_lib
401          but also takes a (possibly empty) list of existing library handles
402          that the current library depends on
403    
404    ----------------------------------------------------------------------
405    Name: Matthias Blume
406    Date: 2002/01/10
407    Tag: blume-20020110-newffigen
408    Description:
409    
410    1. Updates to portable graph code.
411    
412    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
413       more scalable now so that even huge interfaces such as the one
414       for GTK compile in finite time and space. :-)
415       See src/ml-nlffigen/README for details on what's new.
416    
417    ----------------------------------------------------------------------
418    Name: Lal George
419    Date: 2001/01/09 14:31:35 EST 2002
420    Tag: george-20011206-rm-native-copy
421    Description:
422    
423            Removed the native COPY and FCOPY instructions
424            from all the architectures and replaced it with the
425            explicit COPY instruction from the previous commit.
426    
427            It is now possible to simplify many of the optimizations
428            modules that manipulate copies. This has not been
429            done in this change.
430    
431    ----------------------------------------------------------------------
432    Name: Lal George
433    Date: 2001/12/06 16:50:13 EST 2001
434    Tag: george-20011206-mlrisc-instruction
435    Description:
436    
437    Changed the representation of instructions from being fully abstract
438    to being partially concrete. That is to say:
439    
440      from
441            type instruction
442    
443      to
444            type instr                              (* machine instruction *)
445    
446            datatype instruction =
447                LIVE of {regs: C.cellset, spilled: C.cellset}
448              | KILL of {regs: C.cellset, spilled: C.cellset}
449              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
450              | ANNOTATION of {i: instruction, a: Annotations.annotation}
451              | INSTR of instr
452    
453    This makes the handling of certain special instructions that appear on
454    all architectures easier and uniform.
455    
456    LIVE and KILL say that a list of registers are live or killed at the
457    program point where they appear. No spill code is generated when an
458    element of the 'regs' field is spilled, but the register is moved to
459    the 'spilled' (which is present, more for debugging than anything else).
460    
461    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
462    We used to generate:
463    
464            DEFFREG f1
465            f1 := f2 + f3
466            trapb
467    
468    but now generate:
469    
470            f1 := f2 + f3
471            trapb
472            LIVE {regs=[f1,f2,f3], spilled=[]}
473    
474    Furthermore, the DEFFREG (hack) required that all floating point instruction
475    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
476    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
477    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
478    this architecture).
479    
480    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
481    all the architectures. This will result in further simplification of the
482    register allocator that must be aware of them for coalescing purposes, and
483    will also simplify certain aspects of the machine description that provides
484    callbacks related to parallel copies.
485    
486    ANNOTATION should be obvious, and now INSTR represents the honest to God
487    machine instruction set!
488    
489    The <arch>/instructions/<arch>Instr.sml files define certain utility
490    functions for making porting easier -- essentially converting upper case
491    to lower case. All machine instructions (of type instr) are in upper case,
492    and the lower case form generates an MLRISC instruction. For example on
493    the alpha we have:
494    
495      datatype instr =
496         LDA of {r:cell, b:cell, d:operand}
497       | ...
498    
499      val lda : {r:cell, b:cell, d:operand} -> instruction
500        ...
501    
502    where lda is just (INSTR o LDA), etc.
503    
504    ----------------------------------------------------------------------
505    Name: Matthias Blume
506    Date: 2001/11/22 21:40:00 EST
507    Tag: Release_110_37
508    Description:
509    
510    Release 110.37.  This time for real.
511    
512    ----------------------------------------------------------------------
513    Name: Matthias Blume
514    Date: 2001/11/21 16:35:00 EST
515    Tag: blume-20011121-foot-in-mouth
516    Description:
517    
518    Removed the "Release_110_37" tag because of a serious bug.
519    This will be re-tagged once the bug is fixed.
520    
521    ----------------------------------------------------------------------
522    Name: Matthias Blume
523    Date: 2001/11/21 16:14:00 EST
524    Tag: blume-20011121-forgottenfile
525    Description:
526    
527    Forgot to add a file.  (Just a .tex-file -- part of
528    the CM manual source.)
529    
530    ----------------------------------------------------------------------
531    Name: Matthias Blume
532    Date: 2001/11/21 16:10:00 EST
533    Tag: blume-20011121-invalid_110_37
534    Description:
535    
536    Note: I removed the original tag "Release_110_37" from this commit
537          because we found a serious bug in all non-x86 backends.
538          - Matthias
539    
540    1. Modifications to the SML/NJ code generator and to the runtime system
541       so that code object name strings are directly inserted into code
542       objects at code generation time.  The only business the runtime system
543       has with this is now to read the name strings on occasions.
544       (The encoding of the name string has also changed somewhat.)
545    
546    2. CM now implements a simple "set calculus" for specifying export lists.
547       In particular, it is now possible to refer to the export lists of
548       other libraries/groups/sources and form unions as well as differences.
549       See the latest CM manual for details.
550    
551    3. An separate notion of "proxy" libraries has again be eliminated from
552       CM's model.  (Proxy libraries are now simply a special case of using
553       the export list calculus.)
554    
555    4. Some of the existing libraries now take advantage of the new set
556       calculus.
557       (Notice that not all libraries have been converted because some
558       of the existing .cm-files are supposed to be backward compatible
559       with 110.0.x.)
560    
561    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
562       "General.exnMessage"!  The former relies on a certain hook to be
563       initialized, and that often does not happen in the stand-alone case.)
564    
565    ----------------------------------------------------------------------
566    Name: Lal George
567    Date: 2001/11/21  13:56:18 EST
568    Tag: george-2001121-pseudo-ops
569    Description:
570    
571      Implemented a complete redesign of MLRISC pseudo-ops. Now there
572      ought to never be any question of incompatabilities with
573      pseudo-op syntax expected by host assemblers.
574    
575      For now, only modules supporting GAS syntax are implemented
576      but more should follow, such as MASM, and vendor assembler
577      syntax, e.g. IBM as, Sun as, etc.
578    
579    ----------------------------------------------------------------------
580    Name: Matthias Blume
581    Date: 2001/11/14 11:52:00 EST
582    Tag: blume-20011114-srcname
583    Description:
584    
585    1. Routed the name of the current source file to mlriscgen where it
586       should be directly emitted into the code object.  (This last part
587       is yet to be done.)
588    
589    2. Some cleanup of the pgraph code to make it match the proposal that
590       I put out the other day.  (The proposal notwithstanding, things are
591       still in flux here.)
592    
593    ----------------------------------------------------------------------
594    Name: Lal George
595    Date: 2001/11/14 09:44:04 EST
596    Tag:
597    Description:
598    
599      Fix for a backpatching bug reported by Allen.
600    
601      Because the boundary between short and long span-dependent
602      instructions is +/- 128, there are an astounding number of
603      span-dependent instructions whose size is over estimated.
604    
605      Allen came up with the idea of letting the size of span
606      dependent instructions be non-monotonic, for a maxIter
607      number of times, after which the size must be monotonically
608      increasing.
609    
610      This table shows the number of span-dependent instructions
611      whose size was over-estimated as a function of maxIter, for the
612      file Parse/parse/ml.grm.sml:
613    
614         maxIter            # of instructions:
615            10                      687
616            20                      438
617            30                      198
618            40                        0
619    
620      In compiling the compiler, there is no significant difference in
621      compilation speed between maxIter=10 and maxIter=40. Actually,
622      my measurements showed that maxIter=40 was a tad faster than
623      maxIter=10! Also 96% of the  files in the compiler reach a fix
624      point within 13 iterations, so fixing maxIter at 40, while high,
625      is okay.
626    
627    ----------------------------------------------------------------------
628    Name: Matthias Blume
629    Date: 2001/10/31 15:25:00 EST
630    Tag: blume-20011031-pgraph
631    Description:
632    
633    CKIT:
634    * Changed the "Function" constructor of type Ast.ctype to carry optional
635      argument identifiers.
636    * Changed the return type of TypeUtil.getFunction accordingly.
637    * Type equality ignores the argument names.
638    * TypeUtil.composite tries to preserve argument names but gives up quickly
639      if there is a mismatch.
640    
641    installation script:
642    * attempts to use "curl" if available (unless "wget" is available as well)
643    
644    CM:
645    * has an experimental implementation of "portable graphs" which I will
646      soon propose as an implementation-independent library format
647    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
648    
649    NLFFI-LIB:
650    * some cleanup (all cosmetic)
651    
652    NLFFIGEN:
653    * temporarily disabled the mechanism that suppresses ML output for
654      C definitions whose identifiers start with an underscore character
655    * generate val bindings for enum constants
656    * user can request that only one style (light or heavy) is being used;
657      default is to use both (command-line arguments: -heavy and -light)
658    * fixed bug in handling of function types involving incomplete pointers
659    * generate ML entry points that take record arguments (i.e., using
660      named arguments) for C functions that have a prototype with named
661      arguments
662      (see changes to CKIT)
663    
664    ----------------------------------------------------------------------
665  Name: Allen Leung  Name: Allen Leung
666  Date: 2001/10/27 20:34:00 EDT  Date: 2001/10/27 20:34:00 EDT
667  Tag: leunga-20011027-x86-fast-fp-call  Tag: leunga-20011027-x86-fast-fp-call
# Line 109  Line 758 
758    
759  ----------------------------------------------------------------------  ----------------------------------------------------------------------
760  Name: Matthias Blume  Name: Matthias Blume
 >>>>>>> 1.169  
761  Date: 2001/09/18 15:35:00 EDT  Date: 2001/09/18 15:35:00 EDT
762  Tag: blume-20010918-readme11036  Tag: blume-20010918-readme11036
763  Description:  Description:

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