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revision 648, Thu May 25 21:28:21 2000 UTC revision 1080, Wed Feb 20 01:28:00 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: Allen Leung
17    Date: 2002/02/19 20:20:00 EST
18    Tag: leunga-20020219-mlrisc-tools
19    Description:
20    
21       Minor bug fixes to the mlrisc-tools library:
22    
23       1.  Fixed up parsing colon suffixed keywords
24       2.  Added the ability to shut the error messages up
25       3.  Reimplemented the pretty printer and fixed up/improved
26           the pretty printing of handle and -> types.
27       4.  Fixed up generation of literal symbols in the nowhere tool.
28       5.  Added some SML keywords to to sml.sty
29    
30    ----------------------------------------------------------------------
31    Name: Matthias Blume
32    Date: 2002/02/19 16:20:00 EST
33    Tag: blume-20020219-cmffi
34    Description:
35    
36    A wild mix of changes, some minor, some major:
37    
38    * All C FFI-related libraries are now anchored under $c:
39        $/c.cm      --> $c/c.cm
40        $/c-int.cm  --> $c/internals/c-int.cm
41        $/memory.cm --> $c/memory/memory.cm
42    
43    * "make" tool (in CM) now treats its argument pathname slightly
44      differently:
45        1. If the native expansion is an absolute name, then before invoking
46           the "make" command on it, CM will apply OS.Path.mkRelative
47           (with relativeTo = OS.FileSys.getDir()) to it.
48        2. The argument will be passed through to subsequent phases of CM
49           processing without "going native".  In particular, if the argument
50           was an anchored path, then "make" will not lose track of that anchor.
51    
52    * Compiler backends now "know" their respective C calling conventions
53      instead of having to be told about it by ml-nlffigen.  This relieves
54      ml-nlffigen from one of its burdens.
55    
56    * The X86Backend has been split into X86CCallBackend and X86StdCallBackend.
57    
58    * Export C_DEBUG and C_Debug from $c/c.cm.
59    
60    * C type encoding in ml-nlffi-lib has been improved to model the conceptual
61      subtyping relationship between incomplete pointers and their complete
62      counterparts.  For this, ('t, 'c) ptr has been changed to 'o ptr --
63      with the convention of instantiating 'o with ('t, 'c) obj whenever
64      the pointer target type is complete.  In the incomplete case, 'o
65      will be instantiated with some "'c iobj" -- a type obtained by
66      using one of the functors PointerToIncompleteType or PointerToCompleteType.
67    
68      Operations that work on both incomplete and complete pointer types are
69      typed as taking an 'o ptr while operations that require the target to
70      be known are typed as taking some ('t, 'c) obj ptr.
71    
72      voidptr is now a bit "more concrete", namely "type voidptr = void ptr'"
73      where void is an eqtype without any values.  This makes it possible
74      to work on voidptr values using functions meant to operate on light
75      incomplete pointers.
76    
77    * As a result of the above, signature POINTER_TO_INCOMPLETE_TYPE has
78      been vastly simplified.
79    
80    ----------------------------------------------------------------------
81    Name: Matthias Blume
82    Date: 2002/02/19 10:48:00 EST
83    Tag: blume-20020219-pqfix
84    Description:
85    
86    Applied Chris Okasaki's bug fix for priority queues.
87    
88    ----------------------------------------------------------------------
89    Name: Matthias Blume
90    Date: 2002/02/15 17:05:00
91    Tag: Release_110_39
92    Description:
93    
94    Last-minute retagging is becoming a tradition... :-(
95    
96    This is the working release 110.39.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2002/02/15 16:00:00 EST
101    Tag: Release_110_39-orig
102    Description:
103    
104    Working release 110.39.  New bootfiles.
105    
106    (Update: There was a small bug in the installer so it wouldn't work
107    with all shells.  So I retagged. -Matthias)
108    
109    ----------------------------------------------------------------------
110    Name: Matthias Blume
111    Date: 2002/02/15 14:17:00 EST
112    Tag: blume-20020215-showbindings
113    Description:
114    
115    Added EnvRef.listBoundSymbols and CM.State.showBindings.  Especially
116    the latter can be useful for exploring what bindings are available at
117    the interactive prompt.  (The first function returns only the list
118    of symbols that are really bound, the second prints those but also the
119    ones that CM's autoloading mechanism knows about.)
120    
121    ----------------------------------------------------------------------
122    Name: Matthias Blume
123    Date: 2002/02/15 12:08:00 EST
124    Tag: blume-20020215-iptrs
125    Description:
126    
127    Two improvements to ml-nlffigen:
128    
129      1. Write files only if they do not exist or if their current contents
130         do not coincide with what's being written.  (That is, avoid messing
131         with the time stamps unless absolutely necessary.)
132    
133      2. Implement a "repository" mechanism for generated files related
134         to "incomplete pointer types".   See the README file for details.
135    
136    ----------------------------------------------------------------------
137    Name: Matthias Blume
138    Date: 2002/02/14 11:50:00 EST
139    Tag: blume-20020214-quote
140    Description:
141    
142    Added a type 't t_' to tag.sml (in ml-nlffi-lib.cm).  This is required
143    because of the new and improved tag generation scheme.  (Thanks to Allen
144    Leung for pointing it out.)
145    
146    ----------------------------------------------------------------------
147    Name: Lal George
148    Date: 2002/02/14 09:55:27 EST 2002
149    Tag: george-20020214-isabelle-bug
150    Description:
151    
152    Fixed the MLRISC bug sent by Markus Wenzel regarding the compilation
153    of Isabelle on the x86.
154    
155    From Allen:
156    -----------
157     I've found the problem:
158    
159         in ra-core.sml, I use the counter "blocked" to keep track of the
160         true number of elements in the freeze queue.  When the counter goes
161         to zero, I skip examining the queue.  But I've messed up the
162         bookkeeping in combine():
163    
164             else ();
165             case !ucol of
166               PSEUDO => (if !cntv > 0 then
167                     (if !cntu > 0 then blocked := !blocked - 1 else ();
168                                        ^^^^^^^^^^^^^^^^^^^^^^^
169                      moveu := mergeMoveList(!movev, !moveu)
170                     )
171                  else ();
172    
173         combine() is called to coalesce two nodes u and v.
174         I think I was thinking that if the move counts of u and v are both
175         greater than zero then after they are coalesced then one node is
176         removed from the freeze queue.  Apparently I was thinking that
177         both u and v are of low degree, but that's clearly not necessarily true.
178    
179    
180    02/12/2002:
181        Here's the patch.  HOL now compiles.
182    
183        I don't know how this impact on performance (compile
184        time or runtime).  This bug caused the RA (especially on the x86)
185        to go thru the potential spill phase when there are still nodes on the
186        freeze queue.
187    
188    
189    
190    
191    ----------------------------------------------------------------------
192    Name: Matthias Blume
193    Date: 2002/02/13 22:40:00 EST
194    Tag: blume-20020213-fptr-rtti
195    Description:
196    
197    Fixed a bug in ml-nlffigen that was introduced with one of the previous
198    updates.
199    
200    ----------------------------------------------------------------------
201    Name: Matthias Blume
202    Date: 2002/02/13 16:41:00 EST
203    Tag: blume-20020213-cmlpq
204    Description:
205    
206    Added new priority queue export symbols (which have just been added to
207    smlnj-lib.cm) to CML's version of smlnj-lib.cm.  (Otherwise CML would
208    not compile and the installer would choke.)
209    
210    ----------------------------------------------------------------------
211    Name: Matthias Blume
212    Date: 2002/02/13 16:15:00 EST
213    Tag: blume-20020213-various
214    Description:
215    
216    1. More tweaks to ml-nlffigen:
217    
218       - better internal datastructures (resulting in slight speedup)
219       - "-match" option requires exact match
220       - "localized" gensym counters (untagged structs/unions nested within
221         other structs/unions or within typedefs get a fresh counter; their
222         tag will be prefixed by a concatenation of their parents' tags)
223       - bug fixes (related to calculation of transitive closure of types
224         to be included in the output)
225    
226    2. Minor Basis updates:
227    
228       - added implementations for List.collate and Option.app
229    
230    ----------------------------------------------------------------------
231    Name: Matthias Blume
232    Date: 2002/02/11 15:55:00 EST
233    Tag: blume-20020211-gensym
234    Description:
235    
236    Added a "-gensym" option to command line of ml-nlffigen.  This can be
237    used to specify a "stem" -- a string that is inserted in all "gensym'd"
238    names (ML structure names that correspond to unnamed C structs, unions,
239    and enums), so that separate runs of ml-nlffigen do not clash.
240    
241    ----------------------------------------------------------------------
242    Name: Matthias Blume
243    Date: 2002/02/11 12:05:00 EST
244    Tag: blume-20020211-gensml
245    Description:
246    
247    A quick fix for a problem with GenSML (in the pgraph-util library):
248    Make generation of toplevel "local" optional.  (Strictly speaking,
249    signature definitions within "local" are not legal SML.)
250    
251    Other than that: updates to INSTALL and cm/TODO.
252    
253    ----------------------------------------------------------------------
254    Name: Matthias Blume
255    Date: 2002/02/08 15:00:00 EST
256    Tag: blume-20020208-uniquepid
257    Description:
258    
259    0. Version number has been bumped to 110.38.1.  NEW BOOTFILES!!!
260    
261    1. The installer (config/install.sh) has gotten smarter:
262    
263         - Configuration options are a bit easier to specify now
264           (in config/targets).
265         - Bug in recognizing .tar.bz2 files fixed.
266         - Installer automatically resolves dependencies between
267           configuration options (e.g., if you ask for eXene, you will
268           also get cml -- regardless whether you asked for it or not).
269         - Installer can run in "quieter mode" by setting the environment
270           variable INSTALL_QUIETLY to "true".  "Quieter" does not mean
271           "completely silent", though.
272         - Build HashCons library as part of smlnj-lib.
273    
274    2. A new scheme for assigning persistent identifiers to compilation
275       units (and, by extension, to types etc.) has been put into place.
276       This fixes a long-standing bug where types and even dynamic values
277       can get internally confused, thereby compromising type safety
278       (abstraction) and dynamic correctness.  See
279    
280         http://cm.bell-labs.com/cm/cs/who/blume/pid-confusion.tgz
281    
282       for an example of how things could go wrong until now.
283    
284       The downside of the new scheme is that pids are not quite as
285       persistent as they used to be: CM will generate a fresh pid
286       for every compilation unit that it thinks it sees for the first
287       time.  That means that if you compile starting from a clean, fresh
288       source tree at two different times, you end up with different
289       binaries.
290    
291       Cutoff recompilation, however, has not been compromised because
292       CM keeps pid information in special caches between runs.
293    
294    ----------------------------------------------------------------------
295    Name: Lal George
296    Date: 2002/02/07 15:34:13 EST 2002
297    Tag: <none>
298    Description:
299    
300    Compilers that generate assembly code may produce  global labels
301    whose value is resolved at link time. The various peephole optimization
302    modules did not take this in account.
303    
304    TODO. The Labels.addrOf function should really return an option
305    type so that clients are forced to deal with this issue, rather
306    than an exception being raised.
307    
308    ----------------------------------------------------------------------
309    Name: Lal George
310    Date: 2002/02/06 13:55:02 EST
311    Tag: george-20020206-ra-breakup
312    Description:
313    
314    1. A bug fix from Allen.
315    
316        A typo causes extra fstp %st(0)'s to be generated at compensation
317        edges, which might cause stack underflow traps at runtime.  This
318        occurs in fft where there are extraneous fstps right before the 'into'
319        trap instruction (in this case they are harmless since none of the
320        integers overflow.)
321    
322    2. Pulled out various utility modules that were embedded in the modules
323       of the register allocator. I need these modules for other purposes, but
324       they are not complete enough to put into a library (just yet).
325    ----------------------------------------------------------------------
326    Name: Matthias Blume
327    Date: 2002/01/31 16:05:00 EST
328    Tag: blume-20020131-sparc-ccalls
329    Description:
330    
331    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
332       of extra stack space by mistake.  Fixed.
333    
334    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
335    
336    ----------------------------------------------------------------------
337    Name: Allen Leung
338    Date: 2002/01/30
339    Tag: leunga-20020130-nowhere-bug-fix
340    Description:
341    
342       MLRISC bug fixes:
343       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
344       2. MachineInt.fromString was negating its value.
345    
346    ----------------------------------------------------------------------
347    Name: Matthias Blume
348    Date: 2002/01/29
349    Tag: blume-20020129-INSTALL
350    Description:
351    
352    - Added somewhat detailed installation instructions (file INSTALL).
353    - Fixed curl-detection bug in config/install.sh.
354    - It is now possible to select the URL getter using the URLGETTER
355      environment variable:
356    
357          not set / "unknown"      --> automatic detection (script tries wget,
358                                       curl, and lynx)
359          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
360                                       how to properly invoke them)
361          other                    --> use $URLGETTER directly, it must take
362                                       precisely two command-line arguments
363                                       (source URL and destination file name)
364    
365    ----------------------------------------------------------------------
366    Name: Matthias Blume
367    Date: 2002/01/28
368    Tag: blume-20020128-sparc-ccalls
369    Description:
370    
371    - Fixed problem with calculation of "used" registers in sparc-c-calls.
372    - Make use of the allocParam argument in sparc-c-calls.
373    
374    ----------------------------------------------------------------------
375    Name: Matthias Blume
376    Date: 2002/01/28
377    Tag: blume-20020128-allocParam
378    Description:
379    
380    John Reppy:  Changes c-calls API to accept client-callback for
381    allocating extra stack space.
382    me: Corresponding changes to mlriscGen (using a dummy argument that
383        does not change the current behavior).
384    
385    ----------------------------------------------------------------------
386    Name: Matthias Blume
387    Date: 2002/01/28 12:00:00
388    Tag: Release_110_38
389    Description:
390    
391    This time for real!!!
392    
393    ----------------------------------------------------------------------
394    Name: Matthias Blume
395    Date: 2002/01/28 10:56:00 EST
396    Tag: blume-20020128-retraction
397    Description:
398    
399    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
400       with blume-Release_110_38-retracted.)
401    
402    1. Fixed a problem with incorrect rounding modes in real64.sml.
403       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
404    
405    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
406       and enums fixed.  The naming of corresponding ML identifiers should
407       now be consistent again.
408    
409    ----------------------------------------------------------------------
410    Name: Allen Leung
411    Date: 2002/01/27
412    Tag: leunga-20020127-nowhere
413    Description:
414    
415       Added a target called nowhere in the configuration scripts.
416       Enabling this will build the MLRISC 'nowhere' tool (for translating
417       programs with where-clauses into legal SML code) during installation.
418    
419    ----------------------------------------------------------------------
420    Name: Matthias Blume
421    Date: 2002/01/25 21:27:00 EST
422    Tag: blume-Release_110_38-retracted
423    Description:
424    
425    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
426    
427    README will be added later.
428    
429    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
430    (Release_110_38) removed.  Reason: Last-minute bug fixes.
431    
432    ----------------------------------------------------------------------
433    Name: Matthias Blume
434    Date: 2002/01/25
435    Tag: blume-20020125-ffi
436    Description:
437    
438    A large number of tweaks and improvements to ml-nlffi-lib and
439    ml-nlffigen:
440    
441       - ML represenation types have been streamlined
442       - getter and setter functions work with concrete values, not abstract
443         ones where possible
444       - ml-nlffigen command line more flexible (see README file there)
445       - some bugs have been fixed (hopefully)
446    
447    ----------------------------------------------------------------------
448    Name: Lal George
449    Date: 2002/01/24
450    Tag: george-20020124-risc-ra-interface
451    Description:
452    
453       There is a dramatic simplification in the interface to the
454       register allocator for RISC architectures as a result of making
455       parallel copy instructions explicit.
456    
457    ----------------------------------------------------------------------
458    Name: Matthias Blume
459    Date: 2002/01/22
460    Tag: blume-20020122-x86-ccalls
461    Description:
462    
463    Bug fix for c-calls on x86 (having to do with how char- and
464    short-arguments are being handled).
465    
466    ----------------------------------------------------------------------
467    Name: Matthias Blume
468    Date: 2002/01/21
469    Tag: blume-20020121-ff
470    Description:
471    
472    Another day of fiddling with the FFI...
473    
474    1. Bug fix/workaround:  CKIT does not complain about negative array
475       dimensions, so ml-nlffigen has to guard itself against this possibility.
476       (Otherwise a negative dimension would send it into an infinite loop.)
477    
478    2. Some of the abstract types (light objects, light pointers, most "base"
479       types) in structure C are now eqtypes.
480    
481    3. Added constructors and test functions for NULL function pointers.
482    
483    ----------------------------------------------------------------------
484    Name: Matthias Blume
485    Date: 2002/01/18
486    Tag: blume-20020118-ready-for-new-release
487    Description:
488    
489    Made config/srcarchiveurl point to a new place.  (Will provide boot
490    files shortly.)
491    
492    Maybe we christen this to be 110.38?
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2002/01/18
497    Tag: blume-20020118-more-ffifiddle
498    Description:
499    
500    Today's FFI fiddling:
501    
502      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
503        C.Set.* that use concrete (MLRep.*) arguments and results instead
504        of abstract ones.
505    
506      - Provided word-style bit operations etc. for "int" representation
507        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
508        and Long.
509    
510    ----------------------------------------------------------------------
511    Name: Matthias Blume
512    Date: 2002/01/18
513    Tag: blume-20020118-use-x86-fp
514    Description:
515    
516    Now that x86-fast-fp seems to be working, I turned it back on again
517    by default.  (Seems to work fine now, even with the FFI.)
518    
519    Other than that, I added some documentation about the FFI to
520    src/ml-nlffigen/README and updated the FFI test examples in
521    src/ml-nlffi-lib/Tests/*.
522    
523    ----------------------------------------------------------------------
524    Name: Allen Leung
525    Date: 2002/01/17
526    Tag: leunga-20020117-x86-fast-fp-call
527    Description:
528    
529       1. Fixed a problem with handling return fp values when x86's fast fp
530          mode is turned on.
531    
532       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
533          of %f32.
534    
535       3. Added a constructor INT32lit to the ast of MLRISC tools.
536    
537    ----------------------------------------------------------------------
538    Name: Matthias Blume
539    Date: 2002/01/16
540    Tag: blume-20020116-ffifiddle
541    Description:
542    
543    More fiddling with the FFI interface:
544    
545     - Make constness 'c instead of rw wherever possible.  This eliminates
546       the need for certain explicit coercions.  (However, due to ML's
547       value polymorphism, there will still be many cases where explicit
548       coercions are necessary.  Phantom types are not the whole answer
549       to modeling a subtyping relationship in ML.)
550    
551     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
552    
553     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
554       clumsy workaround for varargs problem.)
555    
556    ----------------------------------------------------------------------
557    Name: Lal George
558    Date: 2002/01/15
559    Tag: <none>
560    Description:
561    
562    1. Since COPY instructions are no longer native to the architecture,
563       a generic functor can be used to implement the expandCopies function.
564    
565    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
566       TEXT segment.
567    
568    ----------------------------------------------------------------------
569    Name: Matthias Blume
570    Date: 2002/01/15
571    Tag: blume-20020115-ffiupdates
572    Description:
573    
574    1. Fix for bug resulting in single-precision float values being returned
575       incorrectly from FFI calls.
576    
577    2. Small modifications to C FFI API:
578    
579        - memory-allocation routines return straight objects (no options)
580          and raise an exception in out-of-memory situations
581        - unsafe extensions to cast between function pointers and pointers
582          from/to ints
583        - added structure C_Debug as an alternative to structure C where
584          pointer-dereferencing (|*| and |*!) always check for null-pointers
585        - added open_lib' to DynLinkage;  open_lib' works like open_lib
586          but also takes a (possibly empty) list of existing library handles
587          that the current library depends on
588    
589    ----------------------------------------------------------------------
590    Name: Matthias Blume
591    Date: 2002/01/10
592    Tag: blume-20020110-newffigen
593    Description:
594    
595    1. Updates to portable graph code.
596    
597    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
598       more scalable now so that even huge interfaces such as the one
599       for GTK compile in finite time and space. :-)
600       See src/ml-nlffigen/README for details on what's new.
601    
602    ----------------------------------------------------------------------
603    Name: Lal George
604    Date: 2001/01/09 14:31:35 EST 2002
605    Tag: george-20011206-rm-native-copy
606    Description:
607    
608            Removed the native COPY and FCOPY instructions
609            from all the architectures and replaced it with the
610            explicit COPY instruction from the previous commit.
611    
612            It is now possible to simplify many of the optimizations
613            modules that manipulate copies. This has not been
614            done in this change.
615    
616    ----------------------------------------------------------------------
617    Name: Lal George
618    Date: 2001/12/06 16:50:13 EST 2001
619    Tag: george-20011206-mlrisc-instruction
620    Description:
621    
622    Changed the representation of instructions from being fully abstract
623    to being partially concrete. That is to say:
624    
625      from
626            type instruction
627    
628      to
629            type instr                              (* machine instruction *)
630    
631            datatype instruction =
632                LIVE of {regs: C.cellset, spilled: C.cellset}
633              | KILL of {regs: C.cellset, spilled: C.cellset}
634              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
635              | ANNOTATION of {i: instruction, a: Annotations.annotation}
636              | INSTR of instr
637    
638    This makes the handling of certain special instructions that appear on
639    all architectures easier and uniform.
640    
641    LIVE and KILL say that a list of registers are live or killed at the
642    program point where they appear. No spill code is generated when an
643    element of the 'regs' field is spilled, but the register is moved to
644    the 'spilled' (which is present, more for debugging than anything else).
645    
646    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
647    We used to generate:
648    
649            DEFFREG f1
650            f1 := f2 + f3
651            trapb
652    
653    but now generate:
654    
655            f1 := f2 + f3
656            trapb
657            LIVE {regs=[f1,f2,f3], spilled=[]}
658    
659    Furthermore, the DEFFREG (hack) required that all floating point instruction
660    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
661    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
662    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
663    this architecture).
664    
665    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
666    all the architectures. This will result in further simplification of the
667    register allocator that must be aware of them for coalescing purposes, and
668    will also simplify certain aspects of the machine description that provides
669    callbacks related to parallel copies.
670    
671    ANNOTATION should be obvious, and now INSTR represents the honest to God
672    machine instruction set!
673    
674    The <arch>/instructions/<arch>Instr.sml files define certain utility
675    functions for making porting easier -- essentially converting upper case
676    to lower case. All machine instructions (of type instr) are in upper case,
677    and the lower case form generates an MLRISC instruction. For example on
678    the alpha we have:
679    
680      datatype instr =
681         LDA of {r:cell, b:cell, d:operand}
682       | ...
683    
684      val lda : {r:cell, b:cell, d:operand} -> instruction
685        ...
686    
687    where lda is just (INSTR o LDA), etc.
688    
689    ----------------------------------------------------------------------
690    Name: Matthias Blume
691    Date: 2001/11/22 21:40:00 EST
692    Tag: Release_110_37
693    Description:
694    
695    Release 110.37.  This time for real.
696    
697    ----------------------------------------------------------------------
698    Name: Matthias Blume
699    Date: 2001/11/21 16:35:00 EST
700    Tag: blume-20011121-foot-in-mouth
701    Description:
702    
703    Removed the "Release_110_37" tag because of a serious bug.
704    This will be re-tagged once the bug is fixed.
705    
706    ----------------------------------------------------------------------
707    Name: Matthias Blume
708    Date: 2001/11/21 16:14:00 EST
709    Tag: blume-20011121-forgottenfile
710    Description:
711    
712    Forgot to add a file.  (Just a .tex-file -- part of
713    the CM manual source.)
714    
715    ----------------------------------------------------------------------
716    Name: Matthias Blume
717    Date: 2001/11/21 16:10:00 EST
718    Tag: blume-20011121-invalid_110_37
719    Description:
720    
721    Note: I removed the original tag "Release_110_37" from this commit
722          because we found a serious bug in all non-x86 backends.
723          - Matthias
724    
725    1. Modifications to the SML/NJ code generator and to the runtime system
726       so that code object name strings are directly inserted into code
727       objects at code generation time.  The only business the runtime system
728       has with this is now to read the name strings on occasions.
729       (The encoding of the name string has also changed somewhat.)
730    
731    2. CM now implements a simple "set calculus" for specifying export lists.
732       In particular, it is now possible to refer to the export lists of
733       other libraries/groups/sources and form unions as well as differences.
734       See the latest CM manual for details.
735    
736    3. An separate notion of "proxy" libraries has again be eliminated from
737       CM's model.  (Proxy libraries are now simply a special case of using
738       the export list calculus.)
739    
740    4. Some of the existing libraries now take advantage of the new set
741       calculus.
742       (Notice that not all libraries have been converted because some
743       of the existing .cm-files are supposed to be backward compatible
744       with 110.0.x.)
745    
746    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
747       "General.exnMessage"!  The former relies on a certain hook to be
748       initialized, and that often does not happen in the stand-alone case.)
749    
750    ----------------------------------------------------------------------
751    Name: Lal George
752    Date: 2001/11/21  13:56:18 EST
753    Tag: george-2001121-pseudo-ops
754    Description:
755    
756      Implemented a complete redesign of MLRISC pseudo-ops. Now there
757      ought to never be any question of incompatabilities with
758      pseudo-op syntax expected by host assemblers.
759    
760      For now, only modules supporting GAS syntax are implemented
761      but more should follow, such as MASM, and vendor assembler
762      syntax, e.g. IBM as, Sun as, etc.
763    
764    ----------------------------------------------------------------------
765    Name: Matthias Blume
766    Date: 2001/11/14 11:52:00 EST
767    Tag: blume-20011114-srcname
768    Description:
769    
770    1. Routed the name of the current source file to mlriscgen where it
771       should be directly emitted into the code object.  (This last part
772       is yet to be done.)
773    
774    2. Some cleanup of the pgraph code to make it match the proposal that
775       I put out the other day.  (The proposal notwithstanding, things are
776       still in flux here.)
777    
778    ----------------------------------------------------------------------
779    Name: Lal George
780    Date: 2001/11/14 09:44:04 EST
781    Tag:
782    Description:
783    
784      Fix for a backpatching bug reported by Allen.
785    
786      Because the boundary between short and long span-dependent
787      instructions is +/- 128, there are an astounding number of
788      span-dependent instructions whose size is over estimated.
789    
790      Allen came up with the idea of letting the size of span
791      dependent instructions be non-monotonic, for a maxIter
792      number of times, after which the size must be monotonically
793      increasing.
794    
795      This table shows the number of span-dependent instructions
796      whose size was over-estimated as a function of maxIter, for the
797      file Parse/parse/ml.grm.sml:
798    
799         maxIter            # of instructions:
800            10                      687
801            20                      438
802            30                      198
803            40                        0
804    
805      In compiling the compiler, there is no significant difference in
806      compilation speed between maxIter=10 and maxIter=40. Actually,
807      my measurements showed that maxIter=40 was a tad faster than
808      maxIter=10! Also 96% of the  files in the compiler reach a fix
809      point within 13 iterations, so fixing maxIter at 40, while high,
810      is okay.
811    
812    ----------------------------------------------------------------------
813    Name: Matthias Blume
814    Date: 2001/10/31 15:25:00 EST
815    Tag: blume-20011031-pgraph
816    Description:
817    
818    CKIT:
819    * Changed the "Function" constructor of type Ast.ctype to carry optional
820      argument identifiers.
821    * Changed the return type of TypeUtil.getFunction accordingly.
822    * Type equality ignores the argument names.
823    * TypeUtil.composite tries to preserve argument names but gives up quickly
824      if there is a mismatch.
825    
826    installation script:
827    * attempts to use "curl" if available (unless "wget" is available as well)
828    
829    CM:
830    * has an experimental implementation of "portable graphs" which I will
831      soon propose as an implementation-independent library format
832    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
833    
834    NLFFI-LIB:
835    * some cleanup (all cosmetic)
836    
837    NLFFIGEN:
838    * temporarily disabled the mechanism that suppresses ML output for
839      C definitions whose identifiers start with an underscore character
840    * generate val bindings for enum constants
841    * user can request that only one style (light or heavy) is being used;
842      default is to use both (command-line arguments: -heavy and -light)
843    * fixed bug in handling of function types involving incomplete pointers
844    * generate ML entry points that take record arguments (i.e., using
845      named arguments) for C functions that have a prototype with named
846      arguments
847      (see changes to CKIT)
848    
849    ----------------------------------------------------------------------
850    Name: Allen Leung
851    Date: 2001/10/27 20:34:00 EDT
852    Tag: leunga-20011027-x86-fast-fp-call
853    Description:
854    
855       Fixed the bug described in blume-20010920-slowfp.
856    
857       The fix involves
858          1. generating FCOPYs in FSTP in ia32-svid
859          2. marking a CALL with the appropriate annotation
860    
861    ----------------------------------------------------------------------
862    Name: Matthias Blume
863    Date: 2001/10/16 11:32:00 EDT
864    Tag: blume-20011016-netbsd
865    Description:
866    
867    Underscore patch from Chris Richards (fixing problem with compiling
868    runtime system under recent NetBSD).
869    
870    ----------------------------------------------------------------------
871    Name: Allen Leung
872    Date: 2001/10/12 17:18:32 EDT 2001
873    Tag: leung-20011012-x86-printflowgraph
874    Description:
875    
876    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
877    
878    ----------------------------------------------------------------------
879    Name: Lal George
880    Date: 2001/10/11 23:51:34 EDT
881    Tag: george-20011011-too-many-instrs
882    Description:
883    
884    The representation of a program point never expected to see more
885    than 65536 instructions in a basic block!
886    
887    ----------------------------------------------------------------------
888    Name: Lal George
889    Date: 2001/10/09 09:41:37 EDT
890    Tag: george-20011008-mlrisc-labels
891    Description:
892    
893    Changed the machine description files to support printing of
894    local and global labels in assembly code, based on host assembler
895    conventions.
896    
897    ----------------------------------------------------------------------
898    Name: Matthias Blume
899    Date: 2001/09/25 15:25:00 EDT
900    Tag: blume-20010925-exninfo
901    Description:
902    
903    I provided a non-hook implementation of exnName (at the toplevel) and
904    made the "dummy" implementation of exnMessage (at the toplevel) more
905    useful: if nothing gets "hooked in", then at least you are going to
906    see the exception name and a message indicating why you don't see more.
907    
908    [For the time being, programs that need exnMessage and want to use
909    ml-build should either use General.exnMessage (strongly recommended) or
910    refer to structure General at some other point so that CM sees a
911    static dependency.]
912    
913    [Similar remarks go for "print" and "use":  If you want to use their
914    functionality in stand-alone programs generated by ml-build, then use
915    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
916    
917    ----------------------------------------------------------------------
918    Name: Matthias Blume
919    Date: 2001/09/20 17:28:00 EDT
920    Tag: blume-20010920-slowfp
921    Description:
922    
923    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
924    
925    ----------------------------------------------------------------------
926    Name: Matthias Blume
927    Date: 2001/09/20 17:20:00 EDT
928    Tag: blume-20010920-canonicalpaths
929    Description:
930    
931    0. Updated the BOOT file (something that I forgot to do earlier).
932    
933    1. Small internal change to CM so that it avoids "/../" in filenames
934       as much as possible (but only where it is safe).
935    
936    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
937       that arguments that contain delimiters are passed through correctly.
938       This change also means that all "special" arguments of the form
939       @SMLxxx... must come first.
940    
941    3. Changed install script to put relative anchor names for tool commands
942       into pathconfig.
943    
944    ----------------------------------------------------------------------
945    Name: Matthias Blume
946    Date: 2001/09/18 15:35:00 EDT
947    Tag: blume-20010918-readme11036
948    Description:
949    
950    Added README files.
951    
952    ----------------------------------------------------------------------
953    Name: Matthias Blume
954    Date: 2001/09/18 11:45:00 EDT
955    Tag: Release_110_36 (retag)
956    Description:
957    
958    Fixed mistake in config/preloads. Retagged as 110.36.
959    
960    ----------------------------------------------------------------------
961    Name: Matthias Blume
962    Date: 2001/09/18 09:40:00 EDT
963    Tag: Release_110_36_orig (tag changed)
964    Description:
965    
966    New version (110.36).  New bootfiles.
967    
968    ----------------------------------------------------------------------
969    Name: Matthias Blume
970    Date: 2001/09/14 16:15:00 EDT
971    Tag: blume-20010914-x86fastfp
972    Description:
973    
974    John committed some changes that Allen made, in particular a (hopefully)
975    correctly working version of the x86-fp module.
976    
977    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
978    flag to "true".  Everything seems to compile to a fixpoint ok, and
979    "mandelbrot" speeds up by about 15%.
980    
981    ----------------------------------------------------------------------
982    Name: Matthias Blume
983    Date: 2001/09/13 11:20:00 EDT
984    Tag: blume-20010913-minimal
985    Description:
986    
987    1. Stefan Monnier's patch to fix a miscompilation problem that
988       was brought to light by John Reppy's work on Moby.
989    
990    2. Implemented a minimal "structure Compiler" that contains just
991       "version" and "architecture".  The minimal version will be
992       available when the full version is not.  This is for backward-
993       compatibility with code that wants to test Compiler.version.
994    
995    ----------------------------------------------------------------------
996    Name: Matthias Blume
997    Date: 2001/08/28 14:03:00 EDT
998    Tag: blume-20010828-ml-lex
999    Description:
1000    
1001    Fix for bug 1581, received from Neophytos Michael.
1002    
1003    ----------------------------------------------------------------------
1004    Name: Matthias Blume
1005    Date: 2001/08/27 11:20:00 EDT
1006    Tag: blume-20010827-readme11035
1007    Description:
1008    
1009    Fleshed out the README file for 110.35.
1010    
1011    ----------------------------------------------------------------------
1012    Name: Matthias Blume
1013    Date: 2001/08/24 17:10:00 EDT
1014    Tag: Release_110_35
1015    Description:
1016    
1017    New version number (110.35).  New bootfiles.
1018    
1019    ----------------------------------------------------------------------
1020    Name: Lal George
1021    Date: 2001/08/24 13:47:18 EDT 2001
1022    Tag: george-20010824-MLRISC-graphs
1023    Description:
1024    
1025     removed clusters from MLRISC completely and replaced with graphs.
1026    
1027    ----------------------------------------------------------------------
1028    Name: Matthias Blume
1029    Date: 2001/08/23 17:50:00 EDT
1030    Tag: blume-20010823-toplevel
1031    Description:
1032    
1033    - some reorganization of the code that implements various kinds of
1034      environments in the compiler (static, dynamic, symbolic, combined)
1035    - re-implemented the EnvRef module so that evalStream works properly
1036      (if the stream contains references to "use", "CM.make", etc.)
1037    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
1038    
1039    ----------------------------------------------------------------------
1040    Name: Matthias Blume
1041    Date: 2001/08/20 15:50 EDT
1042    Tag: blume20010820-slipup
1043    Description:
1044    
1045    I forgot to commit a few files.  Here they are...
1046    
1047    ----------------------------------------------------------------------
1048    Name: Matthias Blume
1049    Date: 2001/08/20 15:35:00 EDT
1050    Tag: blume-20010820-debugprof
1051    Description:
1052    
1053    !!!! NEW BOOTFILES !!!!
1054    
1055    This is another round of reorganizing the compiler sources.  This
1056    time the main goal was to factor out all the "instrumentation"
1057    passes (for profiling and backtracing) into their own library.
1058    The difficulty was to do it in such a way that it does not depend
1059    on elaborate.cm but only on elabdata.cm.
1060    
1061    Therefore there have been further changes to both elaborate.cm and
1062    elabdata.cm -- more "generic" things have been moved from the former
1063    to the latter.  As a result, I was forced to split the assignment
1064    of numbers indicating "primtyc"s into two portions: SML-generic and
1065    SML/NJ-specific.  Since it would have been awkward to maintain,
1066    I bit the bullet and actually _changed_ the mapping between these
1067    numbers and primtycs.  The bottom line of this is that you need
1068    a new set of bin- and bootfiles.
1069    
1070    I have built new bootfiles for all architectures, so doing a fresh
1071    checkout and config/install.sh should be all you need.
1072    
1073    The newly created library's name is
1074    
1075        $smlnj/viscomp/debugprof.cm
1076    
1077    and its sources live under
1078    
1079        src/compiler/DebugProf
1080    
1081    ----------------------------------------------------------------------
1082    Name: Matthias Blume
1083    Date: 2001/08/15 17:15:00 EDT
1084    Tag: blume-20010815-compreorg
1085    Description:
1086    
1087    This is a first cut at reorganizing the CM libraries that make up the
1088    core of the compiler.  The idea is to separate out pieces that could
1089    be used independently by tools, e.g., the parser, the typechecker, etc.
1090    
1091    The current status is a step in this direction, but it is not quite
1092    satisfactory yet.  Expect more changes in the future.
1093    
1094    Here is the current (new) organization...
1095    
1096        What used to be $smlnj/viscomp/core.cm is now divided into
1097        six CM libraries:
1098    
1099             $smlnj/viscomp/basics.cm
1100                           /parser.cm
1101                           /elabdata.cm
1102                           /elaborate.cm
1103                           /execute.cm
1104                           /core.cm
1105    
1106        The CM files for these libraries live under src/system/smlnj/viscomp.
1107        All these libraries are proxy libraries that contain precisely
1108        one CM library component.  Here are the locations of the components
1109        (all within the src/compiler tree):
1110    
1111             Basics/basics.cm
1112             Parse/parser.cm
1113             ElabData/elabdata.cm
1114             Elaborator/elaborate.cm
1115             Execution/execute.cm
1116             core.cm
1117    
1118         [This organization is the same that has been used already
1119         for a while for the architecture-specific parts of the visible
1120         compiler and for the old version of core.cm.]
1121    
1122         As you will notice, many source files have been moved from their
1123         respective original locations to a new home in one of the above
1124         subtrees.
1125    
1126         The division of labor between the new libraries is the following:
1127    
1128             basics.cm:
1129                - Simple, basic definitions that pertain to many (or all) of
1130                  the other libraries.
1131             parser.cm:
1132                - The SML parser, producing output of type Ast.dec.
1133                - The type family for Ast is also defined and exported here.
1134             elabdata.cm:
1135                - The datatypes that describe input and output of the elaborator.
1136                  This includes types, absyn, and static environments.
1137             elaborator.cm:
1138                - The SML/NJ type checker and elaborator.
1139                  This maps an Ast.dec (with a given static environment) to
1140                  an Absyn.dec (with a new static environment).
1141                - This libraries implements certain modules that used to be
1142                  structures as functors (to remove dependencies on FLINT).
1143             execute.cm:
1144                - Everything having to do with executing binary code objects.
1145                - Dynamic environments.
1146             core.cm:
1147                - SML/NJ-specific instantiations of the elaborator and MLRISC.
1148                - Top-level modules.
1149                - FLINT (this should eventually become its own library)
1150    
1151    Notes:
1152    
1153    I am not 100% happy with the way I separated the elaborator (and its
1154    data structures) from FLINT.  Two instances of the same problem:
1155    
1156        1. Data structures contain certain fields that carry FLINT-specific
1157           information.  I hacked around this using exn and the property list
1158           module from smlnj-lib.  But the fact that there are middle-end
1159           specific fields around at all is a bit annoying.
1160    
1161        2. The elaborator calculates certain FLINT-related information.  I tried
1162           to make this as abstract as I could using functorization, but, again,
1163           the fact that the elaborator has to perform calculations on behalf
1164           of the middle-end at all is not nice.
1165    
1166        3. Having to used exn and property lists is unfortunate because it
1167           weakens type checking.  The other alternative (parameterizing
1168           nearly *everything*) is not appealing, though.
1169    
1170    I removed the "rebinding =" warning hack because due to the new organization
1171    it was awkward to maintain it.  As a result, the compiler now issues some of
1172    these warnings when compiling init.cmi during bootstrap compilation. On
1173    the plus side, you also get a warning when you do, for example:
1174       val op = = Int32.+
1175    which was not the case up to now.
1176    
1177    I placed "assign" and "deref" into the _Core structure so that the
1178    code that deals with the "lazy" keyword can find them there.  This
1179    removes the need for having access to the primitive environment
1180    during elaboration.
1181    
1182    ----------------------------------------------------------------------
1183    Name: Matthias Blume
1184    Date: 2001/08/13
1185    Tag: blume-20010813-closures
1186    Description:
1187    
1188    This fix was sent to us by Zhong Shao.  It is supposed to improve the
1189    performance of certain loops by avoiding needless closure allocation.
1190    
1191    ----------------------------------------------------------------------
1192    Name: Lal George
1193    Date: 2001/07/31 10:03:23 EDT 2001
1194    Tag: george-20010731-x86-fmalloc
1195    Description: Fixed bug in x86 calls
1196    
1197        There was a bug where call instructions would mysteriously
1198        vanish. The call instruction had to be one that returned
1199        a floating point value.
1200    
1201    ----------------------------------------------------------------------
1202    Name: Lal George
1203    Date: 2001/07/19 16:36:29 EDT 2001
1204    Tag: george-20010719-simple-cells
1205    Description:
1206    
1207    I have dramatically simplified the interface for CELLS in MLRISC.
1208    
1209    In summary, the cells interface is broken up into three parts:
1210    
1211      1. CellsBasis : CELLS_BASIS
1212    
1213            CellsBasis is a top level structure and common for all
1214            architectures.  it contains the definitions of basic datatypes
1215            and utility  functions over these types.
1216    
1217      2. functor Cells() : CELLS
1218    
1219            Cells generates an interface for CELLS that incorporates the
1220            specific resources on the target architecture, such as the
1221            presence of special register classes, their number and size,
1222            and various useful substructures.
1223    
1224      3. <ARCH>CELLS
1225    
1226            e.g. SparcCells: SPARCCELLS
1227    
1228            <ARCH>CELLS usually contains additional bindings for special
1229            registers  on the architecture, such as:
1230    
1231                    val r0 : cell           (* register zero *)
1232                    val y : cell            (* Y register *)
1233                    val psr : cell          (* processor status register *)
1234                    ...
1235    
1236            The structure returned by applying the Cells functor is opened
1237            in this interface.
1238    
1239    The main implication of all this is that the datatypes for cells is
1240    split between CellsBasis and CELLS -- a fairly simple change for user
1241    code.
1242    
1243    In the old scheme the CELLS interface had a definitional binding of
1244    the form:
1245    
1246            signature CELLS = sig
1247    
1248               structure CellsBasis = CellsBasis
1249    
1250               ...
1251    
1252            end
1253    
1254    With all the sharing constraints that goes on in MLRISC, this old
1255    design  quickly leads to errors such as:
1256    
1257            "structure definition spec inside of sharing ... "
1258    
1259    
1260    and appears to require an unacceptable amount of sharing and where
1261    constraint hackery.
1262    
1263    I think this error message (the interaction of definitional specs and
1264    sharing) requires more explanation on our web page.
1265    
1266    ----------------------------------------------------------------------
1267    Name: Matthias Blume
1268    Date: 2001/07/19 15:00:00 EDT
1269    Tag: blume-20010719-libreorg
1270    Description:
1271    
1272    This update puts together a fairly extensive but straightforward change
1273    to the way the libraries that implement the interactive system are
1274    organized:
1275    
1276       The biggest change is the elimination of structure Compiler.  As a
1277       replacement for this structure, there is now a CM library
1278       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
1279       that exports all the substructures of the original structure Compiler
1280       directly.  So instead of saying Compiler.Foo.bar one now simply
1281       says Foo.bar.  (The CM libraries actually export a collection of
1282       structures that is richer than the collection of substructures of
1283       structure Compiler.)
1284    
1285       To make the transition smooth, there is a separate library called
1286       $smlnj/compiler/compiler.cm which puts together and exports the
1287       original structure Compiler (or at least something very close to it).
1288    
1289       There are five members of the original structure Compiler
1290       that are not exported directly but which instead became members
1291       of a new structure Backend (described by signature BACKEND).  These are:
1292       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
1293       Interact (: INTERACT), structure Machine (: MACHINE), and val
1294       architecture (: string).
1295    
1296       Structure Compiler.Version has become structure CompilerVersion.
1297    
1298       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
1299       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
1300       or x86, respectively.
1301       Each of these exports the same frontend structures that
1302       $smlnj/compiler.cm exports.  But they do not have a structure Backend
1303       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
1304       Hppa, PPC, Sparc, or X86, respectively.
1305    
1306       Library $smlnj/compiler/all.cm exports the union of the exports of
1307       $smlnj/compiler/<arch>.cm
1308    
1309       There are no structures <Arch>Compiler anymore, use
1310       $smlnj/compiler/<arch>.cm instead.
1311    
1312       Library host-compiler-0.cm is gone.  Instead, the internal library
1313       that instantiates CM is now called cm0.cm.  Selection of the host
1314       compiler (backend) is no longer done here but. (Responsibility for it
1315       now lies with $smlnj/compiler/current.cm.  This seems to be more
1316       logical.)
1317    
1318       Many individual files have been moved or renamed.  Some files have
1319       been split into multiple files, and some "dead" files have been deleted.
1320    
1321    Aside from these changes to library organization, there are also changes
1322    to the way the code itself is organized:
1323    
1324       Structure Binfile has been re-implemented in such a way that it no
1325       longer needs any knowledge of the compiler.  It exclusively deals
1326       with the details of binfile layout.  It no longer invokes the
1327       compiler (for the purpose of creating new prospective binfile
1328       content), and it no longer has any knowledge of how to interpret
1329       pickles.
1330    
1331       Structure Compile (: COMPILE) has been stripped down to the bare
1332       essentials of compilation.  It no longer deals with linking/execution.
1333       The interface has been cleaned up considerably.
1334    
1335       Utility routines for dealing with linking and execution have been
1336       moved into their own substructures.
1337    
1338       (The ultimate goal of these changes is to provide a light-weight
1339       binfile loader/linker (at least for, e.g., stable libraries) that
1340       does not require CM or the compiler to be present.)
1341    
1342    CM documentation has been updated to reflect the changes to library
1343    organization.
1344    
1345    ----------------------------------------------------------------------
1346    Name: Matthias Blume
1347    Date: 2001/07/10 17:30:00 EDT
1348    Tag: Release_110_34
1349    Description:
1350    
1351    Minor tweak to 110.34 (re-tagged):
1352    
1353      - README.html file added to CVS repository
1354      - runtime compiles properly under FreeBSD 3.X and 4.X
1355    
1356    ----------------------------------------------------------------------
1357    Name: Matthias Blume
1358    Date: 2001/07/10 17:30:00 EDT
1359    Tag: Release_110_34
1360    Description:
1361    
1362    New version number (110.34). New bootfiles.
1363    
1364    ----------------------------------------------------------------------
1365    Name: Matthias Blume
1366    Date: 2001/07/09 16:00:00 EDT
1367    Tag: blume-20010709-more-varargs
1368    Description:
1369    
1370    I changed the handling of varargs in ml-nlffigen again:
1371    The ellipsis ... will now simply be ignored (with an accompanying warning).
1372    
1373    The immediate effect is that you can actually call a varargs function
1374    from ML -- but you can't actually supply any arguments beyond the ones
1375    specified explicitly.  (For example, you can call printf with its format
1376    string, but you cannot pass additional arguments.)
1377    
1378    This behavior is only marginally more useful than the one before, but
1379    it has the advantage that a function or, more importantly, a function
1380    type never gets dropped on the floor, thus avoiding follow-up problems with
1381    other types that refer to the offending one.
1382    
1383    ----------------------------------------------------------------------
1384    Name: Matthias Blume
1385    Date: 2001/07/09 11:25:00 EDT
1386    Tag: blume-20010709-varargs
1387    Description:
1388    
1389    1. ckit-lib.cm now exports structure Error
1390    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1391       with a warning accompanied by a source location.  Moreover, it
1392       merely skips the offending function or type and proceeds with the
1393       rest of its work.u  As a result, one can safely feed C code containing
1394       "..." to ml-nlffigen.
1395    3. There are some internal improvements to CM, providing slightly
1396       more general string substitutions in the tools subsystem.
1397    
1398    ----------------------------------------------------------------------
1399    Name: Matthias Blume
1400    Date: 2001/06/27 15:10:00 EDT
1401    Tag: blume-20010627-concur
1402    Description:
1403    
1404    Fixed a small bug in CM's handling of parallel compilation.
1405    (You could observe the bug by Control-C-interrupting an ordinary
1406    CMB.make or CM.stabilize and then attaching some compile servers.
1407    The result was that all of a sudden the previously interrupted
1408    compilation would continue on its own.  This was because of
1409    an over-optimization: CM did not bother to clean out certain queues
1410    when no servers were attached "anyway", resulting in the contents
1411    of these queues to grab control when new servers did get attached.)
1412    
1413    There is also another minor update to the CM manual.
1414    
1415    ----------------------------------------------------------------------
1416    Name: Matthias Blume
1417    Date: 2001/06/26 16:15:00 EDT
1418    Tag: blume-20010626-cmdoc
1419    Description:
1420    
1421    Minor typo fixed in CM manual (syntax diagram for libraries).
1422    
1423    ----------------------------------------------------------------------
1424    Name: Matthias Blume
1425    Date: 2001/06/25 22:55:00 EDT
1426    Tag: blume-20010625-x86pc
1427    Description:
1428    
1429    Fixed a nasty bug in the X86 assembly code that caused signal
1430    handlers to fail (crash) randomly.
1431    
1432    ----------------------------------------------------------------------
1433    Name: Matthias Blume
1434    Date: 2001/06/25 12:05:00 EDT
1435    Tag: blume-20010625-nlffigen
1436    Description:
1437    
1438    This update fixes a number of minor bugs in ml-nlffigen as reported by
1439    Nick Carter <nbc@andrew.cmu.edu>.
1440    
1441      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1442      2. Default names for generated files are now derived from the name of
1443         the C file *without its directory*.  In particular, this causes generated
1444         files to be placed locally even if the C file is in some system directory.
1445      3. Default names for generated signatures and structures are also derived
1446         from the C file name without its directory.  This avoids silly things
1447         like "structure GL/GL".
1448         (Other silly names are still possible because ml-nlffigen does not do
1449          a thorough check of whether generated names are legal ML identifiers.
1450          When in doubt, use command line arguments to force particular names.)
1451    
1452    ----------------------------------------------------------------------
1453    Name: Matthias Blume
1454    Date: 2001/06/21 12:25:00 EDT
1455    Tag: blume-20010621-eXene
1456    Description:
1457    
1458    eXene now compiles and (sort of) works again.
1459    
1460    The library name (for version > 110.33) is $/eXene.cm.
1461    
1462    I also added an new example in src/eXene/examples/nbody.  See the
1463    README file there for details.
1464    
1465    ----------------------------------------------------------------------
1466    Name: Matthias Blume
1467    Date: 2001/06/20 16:40:00 EDT
1468    Tag: blume-20010620-cml
1469    Description:
1470    
1471    CML now compiles and works again.
1472    
1473    Libraries (for version > 110.33):
1474    
1475      $cml/cml.cm            Main CML library.
1476      $cml/basis.cm          CML's version of $/basis.cm.
1477      $cml/cml-internal.cm   Internal helper library.
1478      $cml/core-cml.cm       Internal helper library.
1479      $cml-lib/trace-cml.cm  Tracing facility.
1480      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1481    
1482    The installer (config/install.sh) has been taught how to properly
1483    install this stuff.
1484    
1485    ----------------------------------------------------------------------
1486    Name: Matthias Blume
1487    Date: 2001/06/19 17:55:00 EDT
1488    Tag: blume-20010619-instantiate
1489    Description:
1490    
1491    This un-breaks the fix for bug 1432.
1492    (The bug was originally fixed in 110.9 but I broke it again some
1493    time after that.)
1494    
1495    ----------------------------------------------------------------------
1496    Name: Matthias Blume
1497    Date: 2001/06/19 17:25:00 EDT
1498    Tag: blume-20010619-signals
1499    Description:
1500    
1501    This should (hopefully) fix the long-standing signal handling bug.
1502    (The runtime system was constructing a continuation record with an
1503    incorrect descriptor which would cause the GC to drop data on the floor...)
1504    
1505    ----------------------------------------------------------------------
1506    Name: Matthias Blume
1507    Date: 2001/06/15 15:05:00 EDT
1508    Tag: blume-20010615-moresparc
1509    Description:
1510    
1511    Here is a short late-hour update related to Sparc c-calls:
1512    
1513     -- made handling of double-word arguments a bit smarter
1514    
1515     -- instruction selection phase tries to collapse certain clumsily
1516        constructed ML-Trees; typical example:
1517    
1518            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1519    
1520        This currently has no further impact on SML/NJ since mlriscGen does
1521        not seem to generate such patterns in the first place, and c-calls
1522        (which did generate them in the beginning) has meanwhile been fixed
1523        so as to avoid them as well.
1524    
1525    ----------------------------------------------------------------------
1526    Name: Matthias Blume
1527    Date: 2001/06/15 15:05:00 EDT
1528    Tag: blume-20010615-sparc
1529    Description:
1530    
1531    The purpose of this update is to provide an implementation of NLFFI
1532    on Sparc machines.
1533    
1534    Here are the changes in detail:
1535    
1536       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1537       the Sparc implementation of the c-calls API.
1538       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1539       for accessing the ML frame.  Thus, we have a real frame pointer and
1540       can freely modify %sp without need for an omit-frame-ptr phase.
1541       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1542       this case.
1543       * ml-nlffigen has been taught to produce code for different architectures
1544       and calling conventions.
1545       * In a way similar to what was done in the x86 case, the Sparc
1546       backend uses its own specific extension to mltree.  (For example,
1547       it needs to be able to generate UNIMP instructions which are part
1548       of the calling convention.)
1549       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1550       to make it easier to plug in new machine- and os-dependent parts).
1551    
1552    There are some other fairly unrelated bug fixes and cleanups as well:
1553    
1554       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1555       that they properly share their libraries with existing SML/NJ libraries.
1556       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1557       follow-up error messages.
1558       * Updates to CM/CMB documentation.
1559    
1560    TODO items:
1561    
1562       * MLRISC should use a different register as its asmTemp on the Sparc.
1563         (The current %o2 is a really bad choice because it is part of the
1564         calling conventions, so things might interfere in unexpected ways.)
1565    
1566    ----------------------------------------------------------------------
1567    Name: Matthias Blume
1568    Date: 2001/06/07
1569    Tag: blume-20010607-calls
1570    Description:
1571    
1572    A number of internal changes related to C calls and calling conventions:
1573    
1574    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1575       number of bytes popped implicitly (by the callee).  In most cases
1576       this field is 0 but on x86/win32 it is some non-zero value.  This
1577       is information provided for the benefit of the "omit-frameptr" pass.
1578    2. The CALL instruction on the x86 carries a similar "pops" field.
1579       The instruction selection phase copies its value from the ML-Tree
1580       CALL statement.
1581    3. On all other architectures, the instruction selection phase checks
1582       whether "pops=0" and complains if not.
1583    4. The c-calls implementation for x86 now accepts two calling conventions:
1584       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1585       up after the call and pops is set to 0.  For "stdcall", the caller
1586       does nothing, leaving the cleanup to the callee; pops is set to
1587       the number of bytes that were pushed onto the stack.
1588    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1589       distinguish between "ccall" and "stdcall".
1590    6. The UNIMP instruction has been added to the supported Sparc instruction
1591       set. (This is needed for implementing the official C calling convention
1592       on this architecture.)
1593    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1594       work with the latest CM.
1595    
1596    ----------------------------------------------------------------------
1597    Name: Matthias Blume
1598    Date: 2001/06/05 15:10:00 EDT
1599    Tag: blume-20010605-cm-index
1600    Description:
1601    
1602    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1603    
1604    1. CM can now generate "index files".  These are human-readable files
1605       that list on a per-.cm-file basis each toplevel symbol defined or
1606       imported.  The location of the index file for
1607       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1608       To enable index-file generation, set CM.Control.generate_index to true
1609       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1610    
1611       The CM manual has been updated accordingly.
1612    
1613    2. I made some slight modifications to the c-calls API in MLRISC.
1614    
1615         a) There is now a callback to support saving/restoring of
1616            dedicated but caller-save registers around the actual call
1617            instruction.
1618         b) One can optionally specify a comment-annotation for the
1619            call instruction.
1620    
1621    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1622       (For example, the comment annotation shows the C prototype of
1623        the function being called.)
1624    
1625    ----------------------------------------------------------------------
1626    Name: Matthias Blume
1627    Date: 2001/06/01 13:30:00 EDT
1628    Tag: blume-20010601-nlffi-cleanup
1629    Description:
1630    
1631    This is mostly a cleanup of MLFFI stuff:
1632    
1633       - some signature files have been put into a more exposed place
1634       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1635       - ml-nlffigen changed accordingly
1636       - tutorial updated
1637    
1638    Other changes:
1639    
1640       - author's affiliation in CM manual(s) updated
1641       - some more recognized keywords added to Allen's sml.sty
1642    
1643    ----------------------------------------------------------------------
1644    Name: Matthias Blume
1645    Date: 2001/05/25 15:30:00 EDT
1646    Tag: blume-20010525-iptr
1647    Description:
1648    
1649      - put the official 110.33-README (as it appears on the ftp server) under
1650        CVS
1651      - fixed a small bug related to incomplete pointer types in
1652        ml-nlffigen
1653      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1654        (it does not need the 'f type parameter)
1655    
1656    ----------------------------------------------------------------------
1657    Name: Matthias Blume
1658    Date: 2001/05/23 14:30:00 EDT
1659    Tag: Release_110_33
1660    Description:
1661    
1662    New version number (110.33).  New bootfiles.
1663    
1664    ----------------------------------------------------------------------
1665    Name: Matthias Blume
1666    Date: 2001/05/22 18:06:00 EDT
1667    Tag: blume-20010522-targets
1668    Description:
1669    
1670    Made install.sh use file config/targets.customized if it exists, falling
1671    back to config/targets if it doesn't.  This way one can have a customized
1672    version of the targets file without touching the "real thing", thus
1673    eliminating the constant fear of accidentally checking something bogus
1674    back into the CVS repository...  (File config/targets.customized must
1675    not be added to the repository!)
1676    
1677    ----------------------------------------------------------------------
1678    Name: Matthias Blume
1679    Date: 2001/05/22 16:30:00 EDT
1680    Tag: blume-20010522-minitut
1681    Description:
1682    
1683    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1684       struct returns.
1685    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1686       incomplete, preliminary documentation for NLFFI.
1687    
1688    ----------------------------------------------------------------------
1689    Name: Matthias Blume
1690    Date: 2001/05/14 11:30:00 EDT
1691    Tag: blume-20010514-script
1692    Description:
1693    
1694    Some bugs in install script fixed.
1695    
1696    In addition to that I also made a slight change to the NLFFI API:
1697    Functors generated by ml-nlffigen now take the dynamic library as a
1698    straight functor argument, not as a suspended one.  (The original
1699    functor code used to force the suspension right away anyway, so there
1700    was nothing gained by this complication of the interface.)
1701    
1702    ----------------------------------------------------------------------
1703    Name: Matthias Blume
1704    Date: 2001/05/11 14:35:00 EDT
1705    Tag: blume-20010511-ml-nlffi
1706    Description:
1707    
1708    I finally took the plunge and added my new FFI code to the main
1709    repository.  For x86-linux it is now ready for prime-time.
1710    
1711    There are two new subdirectories of "src":
1712    
1713      - ml-nlffi-lib:
1714           The utility library for programs using the FFI interface.
1715           Here is the implementation of $/c.cm and its associated low-level
1716           partners $/c-int.cm and $/memory.cm.
1717      - ml-nlffigen:
1718           A stand-alone program for generating ML glue code from C source
1719           code.
1720    
1721    Building ml-nlffigen requires $/ckit-lib.cm.
1722    
1723    The config/install.sh script has been updates to do the Right Thing
1724    (hopefully).
1725    
1726    Notice that the source tree for the C-Kit will not be put under "src"
1727    but directly under the installation root directory.  (This is the
1728    structure that currently exists on the CVS server when you check out
1729    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1730    
1731    Bugs: No documentation yet.
1732    
1733    ----------------------------------------------------------------------
1734    Name: Matthias Blume
1735    Date: 2001/05/09 16:35:00 EDT
1736    Tag: blume-20010509-cpscontract
1737    Description:
1738    
1739    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1740    wrapper/unwrapper elimination did not decrement usage counts and some
1741    dead variables got overlooked by the dead-up logic.)
1742    
1743    ----------------------------------------------------------------------
1744    Name: Lal George
1745    Date: 2001/05/08  17:26:09 EDT
1746    Tag: george-20010508-omit-frameptr
1747    Description:
1748    
1749    Changes to implement the omit-frame-pointer optimization to support
1750    raw C calls. For now, there is only support on the Intel x86, but
1751    other architectures will follow as more experience is gained with this.
1752    
1753    
1754    ----------------------------------------------------------------------
1755    Name: Matthias Blume
1756    Date: 2001/05/07 14:40:00 EDT
1757    Tag: blume-20010507-proxies
1758    Description:
1759    
1760    I made into "proxy libraries" all libraries that qualify for such a
1761    change.  (A qualifying library is a library that has another library or
1762    groups as its sole member and repeats that member's export list
1763    verbatim.  A proxy library avoids this repetition by omitting its export
1764    list, effectively inheriting the list that its (only) member exports.
1765    See the CM manual for more explanation.)
1766    The main effect is that explicit export lists for these libraries
1767    do not have to be kepts in sync, making maintenance a bit easier.
1768    
1769    I also added copyright notices to many .cm-files.
1770    
1771    Last but not least, I made a new set of bootfiles.
1772    
1773    ----------------------------------------------------------------------
1774    Name: Matthias Blume
1775    Date: 2001/05/04 17:00:00 EDT
1776    Tag: blume-20010504-cm-lsplit
1777    Description:
1778    
1779    0. John merged pending changes to $/smlnj-lib.cm
1780    
1781    1. Allen's previous change accidentally backed out of one of Lal's
1782       earlier changes.  I undid this mistake (re-introducing Lal's change).
1783    
1784    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1785       within the compiler where applicable.  There is some code simplification
1786       because of that.
1787    
1788    3. The "split" phase (in FLINT) is now part of the default list of phases.
1789       Compiler.Control.LambdaSplitting.* can be used to globally control the
1790       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1791       it can now also be controlled on a per-source basis: CM has been taught
1792       a new tool parameter applicable to ML source files.
1793    
1794       - To turn lambda-splitting off completely:
1795            local open Compiler.Control.LambdaSplitting in
1796                val _ = set Off
1797            end
1798       - To make "no lambda-splitting" the global default (but allow per-source
1799         overriding); this is the initial setting:
1800            local open Compiler.Control.LambdaSplitting in
1801                val _ = set (Default NONE)
1802            end
1803       - To make "lambda-splitting with aggressiveness a" the global default
1804         (and allow per-source overriding):
1805            local open Compiler.Control.LambdaSplitting in
1806                val _ = set (Default (SOME a))
1807            end
1808    
1809       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1810         write (in the respective .cm-file):
1811            a.sml (lambdasplitting:off)
1812       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1813            a.sml (lambdasplitting:on)
1814       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1815         <a> is a decimal non-negative integer):
1816            a.sml (lambdasplitting:<a>)
1817       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1818            a.sml (lambdasplitting:infinity)
1819       - To use the global default for a.sml:
1820            a.sml (lambdasplitting:default)
1821         or simply
1822            a.sml
1823    
1824    ----------------------------------------------------------------------
1825    Name: Allen Leung
1826    Date: 2001/05/04 01:57:00 EDT
1827    Tag: leunga-20010504-sync
1828    Description:
1829    
1830      MLRISC features.
1831    
1832      1. Fix to CMPXCHG instructions.
1833      2. Changed RA interface to allow annotations in callbacks.
1834      3. Added a new method to the stream interface to allow annotations updates.
1835    
1836    ----------------------------------------------------------------------
1837    Name: Matthias Blume
1838    Date: 2001/05/01 11:45:00 EDT
1839    Tag: blume-20010501-pcedittmp
1840    Description:
1841    
1842    Changed install.sh to use the current working directory instead of
1843    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1844    of /usr/tmp caused trouble with MacOS X because of file premission
1845    problems.
1846    
1847    ----------------------------------------------------------------------
1848    Name: Matthias Blume
1849    Date: 2001/04/20 11:10:00 EDT
1850    Tag: blume-20010420-inMLflag
1851    Description:
1852    
1853     - added vp_limitPtrMask to vproc-state.h
1854       (for use by the raw-C-calls mechanism to implement proper interrupt
1855        handling)
1856     - made the ML compiler aware of various data-structure offsets so it
1857       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1858     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1859       raw C-calls
1860    
1861    ----------------------------------------------------------------------
1862    Name: Lal George
1863    Date: 2001/04/20 09:15:28 EDT
1864    Tag: george-20010420-macosX
1865    Description:
1866    
1867     - Changes to port to Mac OS X; Darwin.
1868    
1869     - In the process I found that sqrt was broken on the PPC, because the
1870       fsqrt instruction is not implemented.
1871    
1872    ----------------------------------------------------------------------
1873    Name: Matthias Blume
1874    Date: 2001/04/18 12:45:00 EDT
1875    Tag: blume-20010418-ccalls
1876    Description:
1877    
1878     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1879       (this bug prevented structure arguments containing pointers from being
1880        passed correctly)
1881     - changed the raw-C-call code in mlriscGen.sml in such a way that
1882       structure arguments are represented as a pointer to the beginning
1883       of the structure (instead of having a series of synthesized arguments,
1884       one for each structure member)
1885    
1886     - made makeml script's verbosity level configurable via environment
1887       variable (MAKEML_VERBOSITY)
1888    
1889     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1890       in rawmem-x86.sml; we are now using the real thing
1891    
1892    ----------------------------------------------------------------------
1893    Name: Matthias Blume
1894    Date: 2001/03/22 16:25:00 EST
1895    Tag: blume-20010322-bootfiles
1896    Description:
1897    
1898    Created a new set of bootfiles (for your automatic installation convenience).
1899    
1900    ----------------------------------------------------------------------
1901    Name: Matthias Blume
1902    Date: 2001/03/22 15:10:00 EST
1903    Tag: blume-20010322-rawmem-parcm
1904    Description:
1905    
1906    1. All "raw memory access" primitives for the new FFI are implemented now
1907       (at least on the x86).
1908    2. Some further cleanup of CM's parallel make mechanism.
1909    
1910    ----------------------------------------------------------------------
1911    Name: Matthias Blume
1912    Date: 2001/03/19 17:53:00 EST
1913    Tag: blume-20010319-parallel
1914    Description:
1915    
1916    Parallel make (using compile servers) now works again.
1917    
1918    To this end, CM.stabilize and CMB.make have been modified to work in
1919    two passes when compile servers are attached:
1920       1. Compile everything, do not perform stabilization; this pass
1921          uses compile servers
1922       2. Stabilize everything; this pass does not use compile servers
1923    If there are no compile servers, the two passes are combined into one
1924    (as before).  Splitting the passes increases the inherent parallelism
1925    in the dependency graph because the entire graph including all
1926    libraries is available at the same time.  This, in turn, improves
1927    server utilization.  The downside is that the master process will
1928    have to do some extra work after compilation is done (because for
1929    technical reasons it must re-read all the binfiles during stabilization).
1930    
1931    ----------------------------------------------------------------------
1932    Name: Matthias Blume
1933    Date: 2001/03/16 12:22:00 EST
1934    Tag: blume-20010316-bootfiles
1935    Description:
1936    
1937    Created a new set of bootfiles (for your automatic installation convenience).
1938    
1939    ----------------------------------------------------------------------
1940    Name: Matthias Blume
1941    Date: 2001/03/16 11:00:00 EST
1942    Tag: blume-20010316-MLTREE-fixup
1943    Description:
1944    
1945    This is a minor fixup for an (untagged) earlier commit by Allen.
1946    (A file was missing).
1947    
1948    ----------------------------------------------------------------------
1949    Name: Allen Leung
1950    Date: Mon Mar  5 18:54:57 EST 2001
1951    Tag: leunga-20010305-cut-support
1952    
1953    1. New support for alternative control-flow in MLTREE.
1954       Currently we support
1955    
1956          FLOW_TO(CALL ...., [k1,...,kn])
1957    
1958       This is needed for 'cuts to' in C-- and try/handle-like constructs
1959       in Moby
1960    
1961       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1962    
1963    2. Register Allocator
1964    
1965       Changes in interface [from Fermin, John]
1966    
1967    3. Alpha 8-bit SLL support [Fermin]
1968    
1969    4. All architectures
1970    
1971       A new module (ClusterExpandCopies) for expanding parallel copies.
1972    
1973    ----------------------------------------------------------------------
1974    Name: Allen Leung
1975    Date: 2001/02/27 23:07:00 EST
1976    Tag: leunga-20010227-minor-stuff
1977    
1978    1. Alpha bug fix for CMOVNE
1979    2. Handle mltree COND(..,FCMP ...,...)
1980    3. Bug fix in simplifier
1981    
1982    ----------------------------------------------------------------------
1983    Name: Matthias Blume
1984    Date: 2001/01/30 17:50:00 EST
1985    Tag: blume-20010130-sync
1986    Description:
1987    
1988    This is just a minor update to sync my devel branch with the main brach.
1989    The only visible change is the addition of some README files.
1990    
1991    ----------------------------------------------------------------------
1992    Name: Matthias Blume
1993    Date: 2001/01/12 23:30:00 JST
1994    Tag: blume-20010112-bootfiles
1995    Description:
1996    
1997    Made a new set of bootfiles that goes with the current state of the
1998    repository.
1999    
2000    ----------------------------------------------------------------------
2001    Name: Matthias Blume
2002    Date: 2001/01/12 21:20:00 JST
2003    Tag: blume-20010112-sync
2004    Description:
2005    
2006    I am just flushing out some minor changes that had accumulated in
2007    my private branch in order to sync with the main tree.  (This is
2008    mainly because I had CVS trouble when trying to merge _into_ my
2009    private branch.)
2010    
2011    Most people should be completely unaffected by this.
2012    
2013    ----------------------------------------------------------------------
2014    Name: Allen Leung
2015    Date: Thu Jan 11 21:03:00 EST 2001
2016    Tag: leunga-20010111-labexp=mltree
2017    Description:
2018    
2019    1.  Removed the type LabelExp and replace it by MLTree.
2020    2.  Rewritten mltree-simplify with the pattern matcher tool.
2021    3.  There were some bugs in alpha code generator which would break
2022        64-bit code generation.
2023    4.  Redo the tools to generate code with the
2024    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
2025        are now generated by perl scripts.
2026    
2027    ----------------------------------------------------------------------
2028    Name: Matthias Blume
2029    Date: 2001/01/10 21:55:00 JST
2030    Tag: blume-20010110-rcc
2031    Description:
2032    
2033    The RCC stuff now seems to work (but only on the x86).
2034    This required hacking of the c-calls interface (and -implementation) in
2035    MLRISC.
2036    
2037    Normal compiler users should be unaffected.
2038    
2039    ----------------------------------------------------------------------
2040    Name: Matthias Blume
2041    Date: 2001/01/09 01:20:00 JST
2042    Tag: blume-20010109-rcc
2043    Description:
2044    
2045    This is a fairly big patch, flushing out a large number of pending
2046    changes that I made to my development copy over the last couple of days.
2047    
2048    Of practical relevance at this moment is a workaround for a pickling
2049    bug that Allen ran into the other day.  The cause of the bug itself is
2050    still unknown and it might be hard to fix it properly, but the
2051    workaround has some merits of its own (namely somewhat reducing pickling
2052    overhead for certain libraries).  Therefore, I think this solution should
2053    be satisfactory at this time.
2054    
2055    The rest of the changes (i.e., the vast majority) has to do with my
2056    ongoing efforts of providing direct support for C function calls from
2057    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
2058    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
2059    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
2060    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
2061    handle RCC.
2062    
2063    The last part (the changes to mlriscGen.sml) are still known to be
2064    wrong on the x86 and not implemented on all other architectures.  But
2065    the infrastructure is in place. I had to change a few functor
2066    signatures in the backend to be able to route the CCalls interface
2067    from MLRISC there, and I had to specialize the mltree type (on the
2068    x86) to include the necessary extensions. (The extensions themselves
2069    were already there and redy to go in MLRISC/x86).
2070    
2071    Everything should be very happy as soon as someone helps me with
2072    mlriscGen.sml...
2073    
2074    In any case, nothing of this should matter to anyone as long as the
2075    new primop is not being used (which is going to be the case unless you
2076    find it where I hid it :). The rest of the compiler is completely
2077    unaffected.
2078    
2079    ----------------------------------------------------------------------
2080    Name: Matthias Blume
2081    Date: 2001/01/05 00:30:00 JST
2082    Tag: blume-20010105-primops
2083    Description:
2084    
2085    Added some experimental support for work that I am doing right now.
2086    These changes mostly concern added primops, but there is also a new
2087    experimental C library in the runtime system (but currently not enabled
2088    anywhere except on Linux/X86).
2089    
2090    In the course of adding primops (and playing with them), I discovered that
2091    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
2092    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
2093    To recover, I made type information in INL_PRIM mandatory and changed
2094    prim.sml as well as built-in.sml accordingly.  The InLine structure now
2095    has complete, correct type information (i.e., no bottom types).
2096    
2097    Since all these changes mean that we need new binfiles, I also bumped the
2098    version number to 110.32.1.
2099    
2100    ----------------------------------------------------------------------
2101    Name: Matthias Blume
2102    Date: 2000/12/30 22:10:00 JST
2103    Tag: blume-20001230-various
2104    Description:
2105    
2106    Added proxy libraries for MLRISC and let MLRISC libraries refer
2107    to each other using path anchors.  (See CM manual for explanation.)
2108    
2109    Updated CM documentation.
2110    
2111    Fixed some bugs in CM.
2112    
2113    Implemented "proxy" libraries (= syntactic sugar for CM).
2114    
2115    Added "-quiet" option to makeml and changed runtime system accordingly.
2116    
2117    Added cleanup handler for exportML to reset timers and compiler stats.
2118    
2119    ----------------------------------------------------------------------
2120    Name: Lal George
2121    Date: 2000/12/22 22:22:58 EST 2000
2122    Tag: Release_110_32
2123    Description:
2124    
2125            Infinite precision used throughout MLRISC.
2126            see MLRISC/mltree/machine-int.sig
2127    
2128    ----------------------------------------------------------------------
2129    Name: Matthias Blume
2130    Date: 2000/12/22 23:16:00 JST
2131    Tag: blume-20001222-warn
2132    Description:
2133    
2134    Corrected wording and formatting of some CM warning message which I
2135    broke in my previous patch.
2136    
2137    ----------------------------------------------------------------------
2138    Name: Matthias Blume
2139    Date: 2000/12/22 21:20:00 JST
2140    Tag: blume-20001222-anchorenv
2141    Description:
2142    
2143    Fixed CM's handling of anchor environments in connection with CMB.make.
2144    
2145    ----------------------------------------------------------------------
2146    Name: Matthias Blume
2147    Date: 2000/12/22 13:15:00 JST
2148    Tag: blume-20001222-cleanup
2149    Description:
2150    
2151    Removed src/cm/ffi which does not (and did not) belong here.
2152    
2153    ----------------------------------------------------------------------
2154    Name: Matthias Blume
2155    Date: 2000/12/21 23:55:00 JST
2156    Tag: blume-20001221-exn
2157    Description:
2158    
2159    Probably most important: CM no longer silently swallows all exceptions
2160    in the compiler.
2161    Plus: some other minor CM changes.  For example, CM now reports some
2162    sizes for generated binfiles (code, data, envpickle, lambdapickle).
2163    
2164    ----------------------------------------------------------------------
2165    Name: Matthias Blume
2166    Date: 2000/12/15 00:01:05 JST
2167    Tag: blume-20001215-dirtool
2168    Description:
2169    
2170    - "dir" tool added.
2171    - improvements and cleanup to Tools structure
2172    - documentation updates
2173    
2174    ----------------------------------------------------------------------
2175    Name: Allen Leung
2176    Date: Thu Dec 14 03:45:24 EST 2000
2177    Description:
2178    Tag:  leunga-20001214-int-inf
2179    Description:
2180    
2181       In IntInf, added these standard functions, which are missing from our
2182    implementation:
2183    
2184        andb : int * int -> int
2185        xorb : int * int -> int
2186        orb  : int * int -> int
2187        notb : int -> int
2188         <<   : int * word -> int
2189        ~>>  : int * word -> int
2190    
2191       Not tested, I hope they are correct.
2192    
2193    ----------------------------------------------------------------------
2194    Name: Allen Leung
2195    Date: Fri Dec  8 19:23:26 EST 2000
2196    Description:
2197    Tag:  leunga-20001208-nowhere
2198    Description:
2199    
2200      Slight improvements to the 'nowhere' tool to handle OR-patterns,
2201    to generate better error messages etc.  Plus a brief manual.
2202    
2203    ----------------------------------------------------------------------
2204    Name: Lal George
2205    Date: 2000/12/08 09:54:02 EST 2000
2206    Tag: Release_110_31
2207    Description:
2208    
2209    - Version 110.31
2210    ----------------------------------------------------------------------
2211    Name: Allen Leung
2212    Date: Thu Dec  7 22:01:04 EST 2000
2213    Tag:  leunga-20001207-cell-monster-hack
2214    Description:
2215    
2216    Major MLRISC internal changes.  Affect all clients.
2217    Summary:
2218    
2219    1.  Type CELLS.cell = int is now replaced by a datatype.
2220        As a result, the old regmap is now gone.  Almost all interfaces
2221        in MLRISC change as a consequence.
2222    
2223    2.  A new brand version of machine description tool (v3.0) that generates
2224        modules expecting the new interface.  The old version is removed.
2225    
2226    3.  The RA interface has been further abstracted into two new functors.
2227        RISC_RA and X86RA.  These functors have much simpler interfaces.
2228        [See also directory MLRISC/demo.]
2229    
2230    4.  Some other new source->source code generation tools are available:
2231    
2232        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
2233        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
2234           I use this tool to generate the peephole optimizers---with the new
2235           cell type changes, peephole rules are becoming difficult to write
2236           without conditional pattern matching.
2237    
2238    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
2239        cover the entire MLRISC source tree so many things broke.
2240    
2241    6.  CM files have been moved to the subdirectory MLRISC/cm.
2242        They are moved because there are a lot of them and they clutter up the
2243        root dir.
2244    
2245    7.  More detailed documentation to come...
2246    
2247        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
2248        a makeml -rebuild first.  This is because of other other
2249        changes that Matthias has made (see below).
2250    
2251    
2252    ----------------------------------------------------------------------
2253    Name: Matthias Blume
2254    Date: 2000/11/30 23:12:00 JST
2255    Tag: blume-20001130-filereorg
2256    Description:
2257    
2258    Some manual updates and some file reorganizations in CM.
2259    
2260    ----------------------------------------------------------------------
2261    Name: Matthias Blume
2262    Date: 2000/11/24 17:45:00 JST
2263    Tag: blume-20001124-link
2264    Description:
2265    
2266    Drastically improved link traversal code for the case that the dynamic
2267    value was already loaded at bootstrap time.  As a result, CM and CMB
2268    now both load blazingly fast -- even on a very slow machine.  Also,
2269    memory consumption has been further reduced by this.
2270    
2271    Warning: The format of the PIDMAP file has changed.  THerefore, to
2272    bootstrap you have to do this:
2273    
2274    1. Run CMB.make
2275    2. Make a symbolic link for the boot directory:
2276         ln -s sml.boot.ARCH-OS xxx
2277    3. "Rebuild" the boot directory:
2278         ./makeml -boot xxx -rebuild sml ; rm xxx
2279    4. Boot normally:
2280          ./makeml
2281    
2282    ----------------------------------------------------------------------
2283    Name: Matthias Blume
2284    Date: 2000/11/21 21:20:00 JST
2285    Tag: blume-20001121-tools
2286    Description:
2287    
2288    Continued hacking on autoloading problem -- with success this time.
2289    Also changed tool-plugin mechanism.  See new CM manual.
2290    
2291    ----------------------------------------------------------------------
2292    Name: Matthias Blume
2293    Date: 2000/11/19 14:30:00 JST
2294    Tag:  blume-20001119-autoload
2295    Description:
2296    
2297    Some hacking to make autoloading faster.  Success for CMB, no success
2298    so far for CM.  There is a reduced structure CM' that autoloads faster.
2299    (This is a temporary, non-documented hack to be eliminated again when
2300    the general problem is solved.)
2301    
2302    ----------------------------------------------------------------------
2303    Name: Matthias Blume
2304    Date: 2000/11/17 14:10:00 JST
2305    Tag: blume-20001117-pickle-lib
2306    Description:
2307    
2308    1. Eliminated comp-lib.cm
2309    2. Made pickle-lib.cm
2310    3. Eliminated all uses of intset.sml (from comp-lib.cm)
2311    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2312       equivalent constructs from smlnj-lib.cm (INtHashTable).
2313    5. Point 4. also goes for those uses of intmap.* in MLRISC.
2314       Duplicated intmap modules thrown out.
2315    6. Hunted down all duplicated SCC code and replaced it with
2316       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2317    7. Rewrote Feedback module.
2318    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
2319       should be thrown out and equivalent modules from smlnj-lib.cm
2320       should be used (IntRedBlackSet, IntListSet, ...).
2321    
2322    Confirmed that compiler compiles to fixpoint.
2323    
2324    ----------------------------------------------------------------------
2325    Name: Allen Leung
2326    Date: 2000/11/10 18:00:00
2327    Tag: leunga-20001110-new-x86-fp
2328    
2329    A new x86 floating point code generator has been added.
2330    By default this is turned off.  To turn this on, do:
2331    
2332        CM.autoload "$smlnj/compiler.cm";
2333        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2334    
2335    Changes:
2336    
2337    1.  Changed FTAN to FPTAN so that the assembly output is correct.
2338    2.  Changed the extension callback for FTANGENT to generate:
2339    
2340              fptan
2341              fstp  %st(0)
2342        instead of
2343              fptan
2344              fstpl ftempmem
2345    
2346    3.  Numerous assembly fixes for x86.
2347    
2348    5.  Cleaned up the machine code output module x86/x86MC.sml and added
2349        support for a whole bunch of instructions and addressing modes:
2350    
2351          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
2352          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
2353          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
2354          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2355          fxch %st(n)
2356          fld %st(n)
2357          fst %st(n)
2358          fst mem
2359          fstp %st(n)
2360          fucom %st(n)
2361          fucomp %st(n)
2362    
2363        All these are now generated when the fast fp mode is turned on.
2364    
2365    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2366    
2367    ----------------------------------------------------------------------
2368    Name: Matthias Blume
2369    Date: 2000/11/09 11:20:00 JST
2370    Tag: blume-20001109-scc
2371    Description:
2372    
2373    Eliminated some code duplication:
2374    
2375    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2376       (Otherwise the functor is useless.)
2377    2. Used GraphSCCFn where SCCUtilFun was used previously.
2378    3. Got rid of SCCUtilFun (in comp-lib.cm).
2379    
2380    ----------------------------------------------------------------------
2381    Name: Lal George
2382    Date: 2000/11/06 09:02:21 EST 2000
2383    Tag: Release_110_30
2384    Description:
2385    
2386    - Version 110.30
2387    ----------------------------------------------------------------------
2388    Name: Matthias Blume
2389    Date: 2000/11/04 14:45:00
2390    Tag: blume-20001104-mlbuild
2391    Description:
2392    
2393    - Made ml-build faster on startup.
2394    - Documentation fixes.
2395    
2396    ----------------------------------------------------------------------
2397    Name: Matthias Blume
2398    Date: 2000/11/02 17:00:00 JST
2399    Tag: blume-20001102-condcomp
2400    Description:
2401    
2402    - Small tweaks to pickler -- new BOOTFILES!
2403    - Version bumped to 110.29.2.
2404    - Added conditional compilation facility to init.cmi (see comment there).
2405    ----------------------------------------------------------------------
2406    Name: Allen Leung
2407    Date: 2000/10/23 19:31:00
2408    Tag: leunga-20001023-demo-ra
2409    
2410    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2411    2. Test programs for the graph library updated
2412    3. Some new MLRISC demo programs added
2413    
2414    ----------------------------------------------------------------------
2415    Name: Matthias Blume
2416    Date: 2000/08/31 22:15:00 JST
2417    Tag: blume-20001017-errmsg
2418    Description:
2419    
2420    More error message grief: Where there used to be no messages, there
2421    now were some that had bogus error regions.  Fixed.
2422    
2423    ----------------------------------------------------------------------
2424    Name: Matthias Blume
2425    Date: 2000/08/31 17:30:00 JST
2426    Tag: blume-20001017-v110p29p1
2427    Description:
2428    
2429    I made a version 110.29.1 with new bootfiles.
2430    
2431    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2432              CM documentation changes and a small bugfix in CM's error reporting.
2433    
2434    ----------------------------------------------------------------------
2435    Name: Lal George
2436    Date: 2000/09/27 14:42:35 EDT
2437    Tag: george-20000927-nodestatus
2438    Description:
2439    
2440    Changed the type of the nodestatus, so that:
2441    
2442            SPILLED(~1)             is now SPILLED
2443            SPILLED(m) where m>=0   is now MEMREG(m)
2444            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2445    
2446    ----------------------------------------------------------------------
2447    Name: Matthias Blume
2448    Date: 2000/09/07 14:45:00 JST
2449    Tag: blume-20000907-cmerrmsg
2450    Description:
2451    
2452    Small tweak to CM to avoid getting ML syntax error messages twice.
2453    
2454    ----------------------------------------------------------------------
2455    Name: Matthias Blume
2456    Date: 2000/08/31 18:00:00 JST
2457    Tag: blume-20000831-cvsbootfiles
2458    Description:
2459    
2460    New URL for boot files (because the 110.29 files on the BL server do
2461    now work correctly with my updated install scripts for yacc and lex).
2462    
2463    ----------------------------------------------------------------------
2464    Name: Matthias Blume
2465    Date: 2000/08/08 12:33:00 JST
2466    Tag: blume-20000808-manual
2467    Description:
2468    
2469    Tiny update to CM manual.
2470    
2471    ----------------------------------------------------------------------
2472    Name: Allen Leung
2473    Date: 2000/08/7 19:31:00
2474    Tag: leunga-20000807-a-whole-bunch-of-stuff
2475    
2476      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2477    and Mobdy.
2478    
2479    1.  x86
2480    
2481       a.  Fixes to peephole module by John and Dan.
2482       b.  Assembly fix to SETcc by Allen.
2483       c.  Fix to c-call by John.
2484       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2485       e.  Instruction selection optimization to SETcc as suggested by John.
2486    
2487           For example,
2488    
2489            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2490    
2491           should generate:
2492    
2493            MOVL a, x
2494            SUBL b, x
2495            SHRL 31, x
2496    
2497    2.  IR stuff
2498    
2499         A bunch of new DJ-graph related algorithms added.  These
2500         speed up SSA construction.
2501    
2502    3.  SSA + Scheduling
2503    
2504         Added code for SSA and scheduling to the repository
2505    
2506    ----------------------------------------------------------------------
2507    Name: Lal George
2508    Date: 2000/07/27 11:53:14 EDT
2509    
2510    Tag: lal-20000727-linux-ppc
2511    Description:
2512    
2513     Made changes to support Linux PPC.
2514     p.s. I have confirmation that the 110.29 boot files work fine.
2515    
2516    ----------------------------------------------------------------------
2517    Name: Matthias Blume
2518    Date: 2000/07/27 17:40:00 JST
2519    Tag: blume-20000727-scripts
2520    Description:
2521    
2522    !!!! WARNING !!!!
2523    You must recompile the runtime system!
2524    !!!! WARNING !!!!
2525    
2526    This is basically another round of script-enhancements:
2527    
2528    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2529       and undefine CM preprocessor symbols.
2530    
2531    2. ml-build avoids generating a new heap image if it finds that the
2532       existing one is still ok.  (The condition is that no ML file had to
2533       be recompiled and all ML files are found to be older that the heap
2534       file.)
2535    
2536       To make this work smoothly, I also hacked the runtime system as
2537       well as SMLofNJ.SysInfo to get access to the heap image suffix
2538       (.sparc-solaris, ...) that is currently being used.
2539    
2540       Moreover, the signature of CM.mk_standalone has changed.  See the
2541       CM manual.
2542    
2543    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2544       CM manual for details.)
2545    
2546    4. More CM manual updates:
2547        - all of the above has been documented.
2548        - there is now a section describing the (CM-related) command line
2549          arguments that are accepted by the "sml" command
2550    
2551    ----------------------------------------------------------------------
2552    Name: Matthias Blume
2553    Date: 2000/07/25 16:20:00 JST
2554    Tag: blume-20000725-makedepend
2555    Description:
2556    
2557    Added a script called ml-makedepend.  This can be used in makefiles
2558    for Unix' make in a way very similar to the "makedepend" command for
2559    C.
2560    
2561    The script internally uses function CM.sources.
2562    
2563    Synopsis:
2564    
2565        ml-makedepend [-f makefile] cmfile targetname
2566    
2567    The default for the makefile is "makefile" (or "Makefile" should
2568    "makefile" not exist).
2569    
2570    ml-makedepend adds a cmfile/targetname-specific section to this
2571    makefile (after removing the previous version of this section).  The
2572    section contains a single dependency specification with targetname on
2573    the LHS (targetname is an arbitrary name), and a list of files derived
2574    from the cmfile on the RHS.  Some of the files on the RHS are
2575    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2576    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2577    path names.  The makefile writer is responsible for making sure that
2578    these variables have correct at the time "make" is invoked.
2579    
2580    ----------------------------------------------------------------------
2581    Name: Matthias Blume
2582    Date: 2000/07/22 23:30:00 JST
2583    Tag: blume-20000722-urlupdate
2584    Description:
2585    
2586    Changed BOOT and config/srcarchiveurl to point to BL server:
2587    
2588        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2589    
2590    ----------------------------------------------------------------------
2591    Name: Matthias Blume
2592    Date: 2000/07/18 18:00:00 JST
2593    Tag: blume-20000718-Version_110_29
2594    Description:
2595    
2596    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2597    
2598    2. Updated config/version to 110.29
2599    
2600    3. Updated config/srcarchiveurl
2601    
2602    3. New boot files!
2603       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2604    
2605    ----------------------------------------------------------------------
2606    Name: Matthias Blume
2607    Date: 2000/07/11 13:58:00 JST
2608    Tag: blume-20000711-doctypo
2609    Description:
2610    
2611    Fixed a few typos in CM manual.
2612    
2613    ----------------------------------------------------------------------
2614    Name: Allen Leung
2615    Date: 2000/06/15 00:38:00
2616    Tag: leunga-20000704-sparc-x86
2617    
2618    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2619    2. fix to x86 RET bug [found by Dan Grossman]
2620    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2621    
2622       Affects c-- and moby only
2623    
2624    ----------------------------------------------------------------------
2625    Name: Matthias Blume
2626    Date: 2000/07/04 15:26:00
2627    Tag: blume-20000704-trigger
2628    Description:
2629    
2630    1. Improvements to CM manual.
2631    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2632       of getting a back-trace.  The function, when called, raises an
2633       internal exception which explicitly carries the full back-trace history,
2634       so it is unaffected by any intervening handle-raise pairs ("trivial"
2635       or not).  The interactive loop will print that history once it arrives
2636       at top level.
2637       Short of having all exceptions implicitly carry the full history, the
2638       recommended way of using this facility is:
2639         - compile your program with instrumentation "on"
2640         - run it, when it raises an exception, look at the history
2641         - if the history is "cut off" because of some handler, go and modify
2642           your program so that it explicitly calls BTrace.trigger
2643         - recompile (still instrumented), and rerun; look at the full history
2644    
2645    ----------------------------------------------------------------------
2646    Name: Matthias Blume
2647    Date: 2000/07/03 15:36:00 JST
2648    Tag: blume-20000702-manual
2649    Description:
2650    
2651    Small corrections and updates to CM manual.
2652    
2653    ----------------------------------------------------------------------
2654    Name: Matthias Blume
2655    Date: 2000/06/29 16:04:00 JST
2656    Tag: blume-20000629-yacctool
2657    Description:
2658    
2659    Changes:
2660    
2661    1. Class "mlyacc" now takes separate arguments to pass options to
2662       generated .sml- and .sig-files independently.
2663    2. Corresponding CM manual updates.
2664    3. BTrace module now also reports call sites.  (However, for loop clusters
2665       it only shows from where the cluster was entered.)  There are associated
2666       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2667    
2668    ----------------------------------------------------------------------
2669    Name: Matthias Blume
2670    Date: 2000/06/27 16:51:00 JST
2671    Tag: blume-20000627-noweb
2672    Description:
2673    
2674    Changes:
2675    
2676     1. Implemented "subdir" and "witness" options for noweb tool.
2677        This caused some slight internal changes in CM's tool implementation.
2678     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2679        some remaining issues from earlier path anchor changes.
2680     3. Updated CM manual accordingly.
2681    
2682     4. Changed implementation of back-tracing so that I now consider it
2683        ready for prime-time.
2684    
2685        In particular, you don't have to explicitly trigger the back-trace
2686        anymore.  Instead, if you are running BTrace-instrumented code and
2687        there is an uncaught exception (regardless of whether or not it was
2688        raised in instrumented code), the top-level evalloop will print
2689        the back-trace.
2690    
2691        Features:
2692    
2693          - Instrumented and uninstrumented code work together seemlessly.
2694            (Of course, uninstrumented code is never mentioned in actual
2695             back-traces.)
2696    
2697          - Asymptotic time- and space-complexity of instrumented code is
2698            equal to that of uninstrumented code.  (This means that
2699            tail-recursion is preserved by the instrumentation phase.)
2700    
2701          - Modules whose code has been instrumented in different sessions
2702            work together without problem.
2703    
2704          - There is no penalty whatsoever on uninstrumented code.
2705    
2706          - There is no penalty on "raise" expressions, even in
2707            instrumented code.
2708    
2709        A potential bug (or perhaps it is a feature, too):
2710    
2711          A back-trace reaches no further than the outermost instrumented
2712          non-trivial "raise".  Here, a "trivial" raise is one that is the
2713          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2714    
2715               <exp> handle e => raise e
2716    
2717          and even
2718    
2719               <exp> handle Foo => raise Bar
2720    
2721          and, of course, through
2722    
2723               <exp> handle Foo => ...
2724    
2725         if the exception was not Foo.
2726    
2727         Back-traces always reach right through any un-instrumented code
2728         including any of its "handle" expressions, trivial or not.
2729    
2730       To try this out, do the following:
2731    
2732         - Erase all existing binfiles for your program.
2733           (You may keep binfiles for those modules where you think you
2734            definitely don't need back-tracing.)
2735         - Turn on back-trace instrumentation:
2736              SMLofNJ.Internals.BTrace.mode (SOME true);
2737         - Recompile your program.  (I.e., run "CM.make" or "use".)
2738         - You may now turn instrumentation off again (if you want):
2739              SMLofNJ.Internals.BTrace.mode (SOME false);
2740         - Run your program as usual.  If it raises an exception that
2741           reaches the interactive toplevel, then a back-trace will
2742           automatically be printed.  After that, the toplevel loop
2743           will print the exception history as usual.
2744    
2745    ----------------------------------------------------------------------
2746    Name: Matthias Blume
2747    Date: 2000/06/26 09:56:46 JST
2748    Tag: blume-20000626-setup
2749    Description:
2750    
2751    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2752          ML code before and after compiling a file (e.g., to set compiler
2753          flags)
2754    
2755    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2756              - associated changes to btrace.sml (BTrace instrumentation pass)
2757              - cleaner implementation of btimp.sml (BTrace tracing and report
2758                module)
2759    
2760    CM manual: * new path encoding documented
2761               * description of setup-parameter to "sml" added
2762    
2763    The biggest user-visible change to back-tracing is that it is no
2764    longer necessary to compile all traced modules within the same
2765    session.  (This was a real limitation.)
2766    
2767    ----------------------------------------------------------------------
2768    Name: Matthias Blume
2769    Date: 2000/06/24 12:40:00 JST
2770    Tag: blume-20000624-startup
2771    Description:
2772    
2773    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2774    bit too often -- to put it mildly. :)
2775    
2776    ----------------------------------------------------------------------
2777    Name: Matthias Blume
2778    Date: 2000/06/23 18:20:00 JST
2779    Tag: blume-20000623-btrace
2780    Description:
2781    
2782    This updates adds a backtrace facility to aid programmers in debugging
2783    their programs.  This involves the following changes:
2784    
2785    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2786       keeping track of the current call stack.  When programs are compiled
2787       in a special mode, the compiler will insert calls to these hooks
2788       into the user program.
2789       "Hook" means that it is possible for different implementations of
2790       back-tracing to register themselves (at different times).
2791    
2792    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2793       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2794       It can be turned on using this call:
2795         SMLofNJ.Internals.BTrace.mode (SOME true);
2796       Turning it off again:
2797         SMLofNJ.Internals.BTrace.mode (SOME false);
2798       Querying the current status:
2799         SMLofNJ.Internals.BTrace.mode NONE;
2800       Annotated programs are about twice as big as normal ones, and they
2801       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2802       where all hooks do nothing).  The slowdown with a plugin that is
2803       actually useful (such as the one supplied by default) is even greater,
2804       but in the case of the default plugin it is still only an constant
2805       factor (amortized).
2806    
2807    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2808       with a sub-structure BTrace for controlling back-tracing.  In particular,
2809       the above-mentioned function "mode" controls whether the annotation
2810       phase is invoked by the compiler.  Another important function is
2811       "trigger": when called it aborts the current execution and causes
2812       the top-level loop to print a full back-trace.
2813    
2814    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2815       for back-tracing.  It keeps track of the dynamic call stack and in
2816       addition to that it keeps a partial history at each "level" of that
2817       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2818       d and b (at separate times, dynamically), then the report will show:
2819    
2820       GOTO   d
2821             /c
2822       GOTO  \b
2823       CALL   a
2824    
2825       This shows that there was an initial non-tail call of a, then a
2826       tail-call to b or c, looping behavior in a cluster of functions that
2827       consist of b and c, and then a goto from that cluster (i.e., either from
2828       b or from c) to d.
2829    
2830       Note that (depending on the user program) the amount of information
2831       that the back-trace module has to keep track of at each level is bounded
2832       by a constant.  Thus, the whole implementation has the same asymptotical
2833       complexity as the original program (both in space and in time).
2834    
2835    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2836       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2837       which is raised by the "trigger" function mentioned above.
2838    
2839    Notes on usage:
2840    
2841    - Annotated code works well together with unannotated code:
2842    Unannotated calls simply do not show up at all in the backtrace.
2843    
2844    - It is not a good idea to let modules that were annotated during
2845    different sessions run at the same time.  This is because the compiler
2846    chooses small integers to identify individual functions, and there
2847    will be clashes if different modules were compiled in separate sessions.
2848    (Nothing will crash, and you will even be told about the clashes, but
2849    back-trace information will in general not be useful.)
2850    
2851    - Back-tracing can be confused by callcc and capture.
2852    
2853    - The only way of getting a back-trace right now is to explicitly
2854    invoke the "trigger" function from your user program.  Eventually, we
2855    should make every exception carry back-trace information (if
2856    available).  But since this creates more overhead at "raise"-time
2857    (similar to the current exnHistory overhead), I have not yet
2858    implemented this.  (The implementation will be rather easy.)  With
2859    exceptions carrying back-trace information, this facility will be even
2860    more useful because users don't need to modify their programs...
2861    
2862    - While it is possible to compile the compiler with back-trace
2863    annotations turned on (I did it to get some confidence in
2864    correctness), you must make absolutely sure that core.sml and
2865    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2866    be compiled with annotation because there is no core access yet, but
2867    if you compile btimp.sml with annotation, then the system will go into
2868    an infinite recursion and crash.)
2869    Since CM currently does not know about BTrace, the only way to turn
2870    annotations on and off for different modules of the compiler is to
2871    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2872    this is awkward and clumsy.
2873    
2874    Sample sessions:
2875    
2876    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2877    - SMLofNJ.Internals.BTrace.mode (SOME true);
2878    [autoloading]
2879    [autoloading done]
2880    val it = false : bool
2881    - structure X = struct
2882    -     fun main n = let
2883    -         fun a (x, 0) = d x
2884    -           | a (x, n) = b (x, n - 1)
2885    -         and b (x, n) = c (x, n)
2886    -         and c (x, n) = a (x, n)
2887    -         and d x = e (x, 3)
2888    -         and e (x, 0) = f x
2889    -           | e (x, n) = e (x, n - 1)
2890    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2891    -           | f n = n * g (n - 1)
2892    -         and g n = a (n, 3)
2893    -     in
2894    -         f n
2895    -     end
2896    - end;
2897    structure X : sig val main : int -> int end
2898    - X.main 3;
2899    *** BACK-TRACE ***
2900    GOTO   stdIn:4.2-13.20: X.main[2].f
2901    GOTO-( stdIn:4.2-13.20: X.main[2].e
2902    GOTO   stdIn:4.2-13.20: X.main[2].d
2903         / stdIn:4.2-13.20: X.main[2].a
2904         | stdIn:4.2-13.20: X.main[2].b
2905    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2906    CALL   stdIn:4.2-13.20: X.main[2].g
2907    GOTO   stdIn:4.2-13.20: X.main[2].f
2908    GOTO-( stdIn:4.2-13.20: X.main[2].e
2909    GOTO   stdIn:4.2-13.20: X.main[2].d
2910         / stdIn:4.2-13.20: X.main[2].a
2911         | stdIn:4.2-13.20: X.main[2].b
2912    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2913    CALL   stdIn:4.2-13.20: X.main[2].g
2914    GOTO   stdIn:4.2-13.20: X.main[2].f
2915    GOTO-( stdIn:4.2-13.20: X.main[2].e
2916    GOTO   stdIn:4.2-13.20: X.main[2].d
2917         / stdIn:4.2-13.20: X.main[2].a
2918         | stdIn:4.2-13.20: X.main[2].b
2919    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2920    CALL   stdIn:4.2-13.20: X.main[2].g
2921    GOTO   stdIn:4.2-13.20: X.main[2].f
2922    CALL   stdIn:2.15-17.4: X.main[2]
2923    -
2924    
2925    (Note that because of a FLINt bug the above code currently does not
2926    compile without BTrace turned on.)
2927    
2928    Here is another example, using my modified Tiger compiler:
2929    
2930    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2931    - SMLofNJ.Internals.BTrace.mode (SOME true);
2932    [autoloading]
2933    [autoloading done]
2934    val it = false : bool
2935    - CM.make "sources.cm";
2936    [autoloading]
2937    ...
2938    [autoloading done]
2939    [scanning sources.cm]
2940    [parsing (sources.cm):parse.sml]
2941    [creating directory CM/SKEL ...]
2942    [parsing (sources.cm):tiger.lex.sml]
2943    ...
2944    [wrote CM/sparc-unix/semant.sml]
2945    [compiling (sources.cm):main.sml]
2946    [wrote CM/sparc-unix/main.sml]
2947    [New bindings added.]
2948    val it = true : bool
2949    - Main.compile ("../testcases/merge.tig", "foo.out");
2950    *** BACK-TRACE ***
2951    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2952    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2953    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2954    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2955    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2956    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2957    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2958         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2959    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2960    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2961    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2962    CALL   main.sml:1.18-118.4: Main.compile[2]
2963    -
2964    
2965    ----------------------------------------------------------------------
2966    Name: Matthias Blumen
2967    Date: 2000/06/21 18:00:00 JST
2968    Tag: blume-20000621-manual
2969    Description:
2970    
2971    CM manual update: Path environments documented.
2972    
2973    ----------------------------------------------------------------------
2974    Name: Matthias Blume
2975    Date: 2000/06/19 13:40:00
2976    Tag: blume-20000619-manual
2977    Description:
2978    
2979    CM manual and system/README update.  This only covers the fact that
2980    there are no more implicit anchors.  (Path environments and the "bind"
2981    option to "cm" have yet to be documented.)
2982    
2983    ----------------------------------------------------------------------
2984    Name: Matthias Blume
2985    Date: 2000/06/19 11:05:00 JST
2986    Tag: blume-20000619-chdir-bugfix
2987    Description:
2988    
2989    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2990    
2991    ----------------------------------------------------------------------
2992    Name: Matthias Blume
2993    Date: 2000/06/18 22:00:10 JST
2994    Tag: blume-20000618-implicit-anchors-really-gone
2995    Description:
2996    
2997    I updates the previous HISTORY entry where I forgot to mention that
2998    implicit anchors are no longer with us.
2999    
3000    The current update also gets rid of the (now useless) controller
3001    CM.Control.implicit_anchors.
3002    
3003    ----------------------------------------------------------------------
3004    Name: Matthias Blume
3005    Date: 2000/06/16 17:30:00 JST
3006    Tag: blume-20000616-anchorenv
3007    Description:
3008    
3009    This patch implements the long anticipated (just kidding :) "anchor
3010    environment" mechanism.  In the course of doing this, I also
3011    re-implemented CM's internal "SrcPath" module from scratch.  The new
3012    one should be more robust in certain boundary cases.  In any case, it
3013    is a lot cleaner than its predecessor (IMHO).
3014    
3015    This time, although there is yet another boot file format change, I
3016    kept the unpickler backward-compatible.  As a result, no new bootfiles
3017    are necessary and bootstrapping is straightforward.  (You cannot read
3018    new bootfiles into an old system, but the other way around is no
3019    problem.)
3020    
3021    Visible changes:
3022    
3023    ** 0. Implicit path anchors (without the leading $-symbol) are no
3024    longer recognized at all. This means that such path names are not
3025    illegal either.  For example, the name basis.cm simply refers to a
3026    local file called "basis.cm" (i.e, the name is an ordinary path
3027    relative to .cm-files directory).  Or, to put it differently, only
3028    names that start with $ are anchored paths.
3029    
3030    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
3031    vanished.
3032    
3033    John (Reppy) had critizised this as soon as I originally proposed and
3034    implemented it, but at that time I did not really deeply believe
3035    him. :) Now I came full-circle because I need the $<singlearc> syntax
3036    in another place where it cannot be seen as an abbreviation for
3037    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
3038    seems to mean (i.e., it "expands" into the corresponding anchor
3039    value).
3040    
3041    However, when paths are used as members in CM description files, it
3042    continues to be true that there must be at least another arc after the
3043    anchor.  This is now enforced separately during semantic analysis
3044    (i.e., from a lexical/syntactical point of view, the notation is ok.)
3045    
3046    ** 2. The "cm" class now accepts an option "bind".  The option's value
3047    is a sub-option list of precisely two items -- one labeled "anchor"
3048    and the other one labeled "value".  As you might expect, "anchor" is
3049    used to specify an anchor name to be bound, and "value" specifies what
3050    the anchor is being bound to.
3051    
3052    The value must be a directory name and can be given in either standard
3053    syntax (including the possibility that it is itself an anchored path)
3054    or native syntax.
3055    
3056    Examples:
3057    
3058       foo.cm (bind:(anchor:bar value:$mystuff/bar))
3059       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
3060    
3061    and so on.
3062    
3063    The meaning of this is that the .cm-file will be processed with an
3064    augmented anchor environment where the given anchor(s) is/are bound to
3065    the given values(s).
3066    
3067    The rationale for having this feature is this: Suppose you are trying
3068    to use two different (already stable) libraries a.cm and b.cm (that
3069    you perhaps didn't write yourself).  Further, suppose each of these
3070    two libraries internally uses its own auxiliary library $aux/lib.cm.
3071    Normally you would now have a problem because the anchor "lib" can not
3072    be bound to more than one value globally.  Therefore, the project that
3073    uses both a.cm and b.cm must locally redirect the anchor to some other
3074    place:
3075    
3076       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
3077       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
3078    
3079    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
3080    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
3081    
3082    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
3083    you when you do so at the time of CM.stabilize).  Therefore, you can
3084    also use an anchored path as the value:
3085    
3086      a.cm (bind:(anchor:lib value:$a-lib))
3087      b.cm (bind:(anchor:lib value:$b-lib))
3088    
3089    Now you can globally configure (using the usual CM.Anchor.anchor or
3090    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
3091    itself is always locally bound, setting it globally is no longer
3092    meaningful or necessary (but it does not hurt either).  In fact, "lib"
3093    can still be used as a global anchor for separate purposes.  As a
3094    matter of fact, one can locally define "lib" in terms of a global
3095    "lib":
3096    
3097      a.cm (bind:(anchor:lib value:$lib/a))
3098      b.cm (bind:(anchor:lib value:$lib/b))
3099    
3100    ** 3: The encoding of path names has changed.  This affects the way
3101    path names are shown in CM's progress report and also the internal
3102    protocol encoding used for parallel make.
3103    
3104    The encoding now uses one or more ':'-separated segments.  Each
3105    segments corresponds to a file that has been specified relative to the
3106    file given by its preceding segment.  The first segment is either
3107    relative to the CWD, absolute, or anchored.  Each segment itself is
3108    basically a Unix pathname; all segments but the first are relative.
3109    
3110    Example:
3111    
3112       $foo/bar/baz.cm:a/b/c.sml
3113    
3114    This path denotes the file bar/a/b/c.sml relative to the directory
3115    denoted by anchor "foo".  Notice that the encoding also includes
3116    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
3117    paths are resolved relative to the .cm-files directory, so baz.cm must
3118    be ignored to get the "real" pathname.
3119    
3120    To make this fact more obvious, CM puts the names of such "virtual
3121    arcs" into parentheses when they appear in progress reports. (No
3122    parentheses will appear in the internal protocol encoding.)  Thus,
3123    what you really see is:
3124    
3125      $foo/bar/(baz.cm):a/b/c.sml
3126    
3127    I find this notation to be much more informative than before.
3128    
3129    Another new feature of the encoding is that special characters
3130    including parentheses, colons, (back)slashes, and white space are
3131    written as \ddd (where ddd is the decimal encoding of the character).
3132    
3133    *** The CM manual still needs to be updated.
3134    
3135    ----------------------------------------------------------------------
3136    Name: Allen Leung
3137    Date: 2000/06/15 00:38:00
3138    Tag: leunga-20000615-x86-peephole
3139    
3140    x86 Peephole fix by Fermin.  Affects c-- and moby only.
3141    
3142    ----------------------------------------------------------------------
3143    Name: Matthias Blume
3144    Date: 2000/06/12 11:40:00
3145    Tag: blume-20000612-parmakefix
3146    Description:
3147    
3148    More cleanup after changing the file naming scheme: This time I
3149    repaired the parallel make mechanism for CMB.make which I broke earlier.
3150    
3151    ----------------------------------------------------------------------
3152    Name: Allen Leung
3153    Date: 2000/06/09 01:25:00
3154    Tag: leunga-20000609-various
3155    
3156    None of these things should affect normal SML/NJ operations
3157    
3158    1. Peephole improvements provided by Fermin (c--)
3159    2. New annotation DEFUSE for adding extra dependence (moby)
3160    3. New X86 LOCK instructions (moby)
3161    4. New machine description language for reservation tables (scheduling)
3162    5. Fixes to various optimization/analysis modules (branch chaining, dominator
3163       trees etc.)
3164    6. I've changed the CM files so that they can work with versions
3165       110.0.6, 110.25 and 110.28
3166    
3167    ----------------------------------------------------------------------
3168    Name: Matthias Blume
3169    Date: 2000/06/09 12:40:00
3170    Tag: blume-20000609-log
3171    Description:
3172    
3173    - Removed all(?) remaining RCS Log entries from sources.
3174    
3175    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
3176      anchored paths).
3177    
3178    ----------------------------------------------------------------------
3179    Name: Matthias Blume
3180    Date: 2000/06/07 17:00:00 JST
3181    Tag: blume-20000607-no-implicit-anchors
3182    Description:
3183    
3184    1. This update changes the default setting for
3185    CM.Control.implicit_anchors from true to false.  This means that
3186    implicit anchors are no longer permitted by default.  I also tried to
3187    make sure that nothing else still relies on implicit anchors.
3188    (This is the next step on the schedule towards a CM that does not even
3189    have the notion of implicit anchors anymore.)
3190    
3191    2. More CM manual updates.
3192    
3193    3. I managed to track down and fix the pickling bug I mentioned last
3194    time.  Because of the previously existing workaround, this entails no
3195    immediate practical changes.
3196    
3197    ----------------------------------------------------------------------
3198    Name: Matthias Blume
3199    Date: 2000/06/06 11:15:00 JST
3200    Tag: blume-20000606-lazierpickle
3201    Description:
3202    
3203    !!!! NEW BOOT FILES !!!!
3204    
3205    * The main purpose of this update is to make library pickles lazier in
3206    order to reduce the initial space penalty for autoloading a library.
3207    As a result, it is now possible to have $smlnj/compiler.cm
3208    pre-registered.  This should take care of the many complaints or
3209    inquiries about missing structure Compiler.  This required changes to
3210    CM's internal data structures and small tweaks to some algorithms.
3211    
3212    As a neat additional effect, it is no longer necessary (for the sake
3213    of lean heap image files) to distinguish between a "minimal" CM and a
3214    "full" CM.  Now, there is only one CM (i.e., the "full" version:
3215    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
3216    interactive top level. ($smlnj/cm/minimal.cm is gone.)
3217    
3218    To make the life of compiler-hackers easier, "makeml" now also
3219    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
3220    words, after you bootstrap a new sml for the first time, you will not
3221    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
3222    around you will still have to do it, though.)
3223    
3224    * A second change consists of major updates to the CM manual.  There
3225    are now several appendices with summary information and also a full
3226    specification of the CM description file syntax.
3227    
3228    * In directory src/system I added the script "allcross".  This script
3229    invokes sml and cross-compiles the compiler for all supported
3230    architectures.  (Useful when providing a new set of boot files.)
3231    
3232    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
3233    added a small tweak to pickle-util.sml to work around this problem,
3234    but it is not a proper fix yet.  I will investigate further.  (The
3235    effect of the bug was an inflation of library pickle size.)
3236    
3237    * Version number increased to 110.28.1 (to avoid compatibility problems).
3238    
3239  ----------------------------------------------------------------------  ----------------------------------------------------------------------
3240  Name: Allen Leung  Name: Allen Leung
3241  Date: 2000/05/25 17:28 EDT  Date: 2000/05/25 17:28 EDT
# Line 502  Line 3727 
3727    
3728  3.  Assembly  3.  Assembly
3729    
3730      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
3731      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
3732      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
3733    
# Line 525  Line 3750 
3750    
3751  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
3752  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
3753  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
3754  legal surface-syntax symbol).  legal surface-syntax symbol).
3755    
3756  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 535  Line 3760 
3760  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
3761    
3762  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3763  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
3764  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
3765  more details.  more details.
3766    
# Line 650  Line 3875 
3875     (specified in the .cm file at each instance where the tool's class is     (specified in the .cm file at each instance where the tool's class is
3876     used).     used).
3877    
3878     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3879     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3880     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3881    
3882     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 663  Line 3888 
3888    
3889     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3890    
3891     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3892     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3893    
3894  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 694  Line 3919 
3919       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3920       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3921       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
3922       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3923       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3924       Dave's hands. :)       Dave's hands. :)
3925    
# Line 797  Line 4022 
4022    
4023       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
4024       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
4025       testl is perferable to andl.       testl is preferable to andl.
4026    
4027  7. RA (x86 only)  7. RA (x86 only)
4028    
# Line 979  Line 4204 
4204    
4205  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
4206  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
4207  specifiel the layout of the tool command line.  See the CM manual for  specifies the layout of the tool command line.  See the CM manual for
4208  explanation.  explanation.
4209    
4210  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
4211  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
4212  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
4213  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 1026  Line 4251 
4251  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for  rebuild.  Having sets of the form <base><k>.{bin,boot}.<arch>-unix for
4252  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,  <k>=1,2,... is normally not a good idea when invoking fixpt.  However,
4253  they might be the result of an earlier partial run of fixpt (which  they might be the result of an earlier partial run of fixpt (which
4254  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
4255  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
4256  and, thus, saves a lot of time.  and, thus, saves a lot of time.
4257    
# Line 1076  Line 4301 
4301    it from that remote directory.    it from that remote directory.
4302    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
4303    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
4304    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
4305    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
4306    
4307    For CVS users, this mechanism is not relevant for source archives, but    For CVS users, this mechanism is not relevant for source archives, but

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