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Diff of /sml/trunk/HISTORY

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revision 588, Fri Mar 31 09:00:02 2000 UTC revision 1049, Thu Jan 31 21:03:49 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16  Name: Matthias Blume  Name: Matthias Blume
17    Date: 2002/01/31 16:05:00 EST
18    Tag: blume-20020131-sparc-ccalls
19    Description:
20    
21    1. C-calls on Sparc needlessly allocated a huge chunk (96 bytes)
22       of extra stack space by mistake.  Fixed.
23    
24    2. Bug in logic of handling of command-line options in ml-nlffigen fixed.
25    
26    ----------------------------------------------------------------------
27    Name: Allen Leung
28    Date: 2002/01/30
29    Tag: leunga-20020130-nowhere-bug-fix
30    Description:
31    
32       MLRISC bug fixes:
33       1. Fixed a bindings computation bug in the 'nowhere' program generator tool.
34       2. MachineInt.fromString was negating its value.
35    
36    ----------------------------------------------------------------------
37    Name: Matthias Blume
38    Date: 2002/01/29
39    Tag: blume-20020129-INSTALL
40    Description:
41    
42    - Added somewhat detailed installation instructions (file INSTALL).
43    - Fixed curl-detection bug in config/install.sh.
44    - It is now possible to select the URL getter using the URLGETTER
45      environment variable:
46    
47          not set / "unknown"      --> automatic detection (script tries wget,
48                                       curl, and lynx)
49          "wget" / "curl" / "lynx" --> use the specified program (script "knows"
50                                       how to properly invoke them)
51          other                    --> use $URLGETTER directly, it must take
52                                       precisely two command-line arguments
53                                       (source URL and destination file name)
54    
55    ----------------------------------------------------------------------
56    Name: Matthias Blume
57    Date: 2002/01/28
58    Tag: blume-20020128-sparc-ccalls
59    Description:
60    
61    - Fixed problem with calculation of "used" registers in sparc-c-calls.
62    - Make use of the allocParam argument in sparc-c-calls.
63    
64    ----------------------------------------------------------------------
65    Name: Matthias Blume
66    Date: 2002/01/28
67    Tag: blume-20020128-allocParam
68    Description:
69    
70    John Reppy:  Changes c-calls API to accept client-callback for
71    allocating extra stack space.
72    me: Corresponding changes to mlriscGen (using a dummy argument that
73        does not change the current behavior).
74    
75    ----------------------------------------------------------------------
76    Name: Matthias Blume
77    Date: 2002/01/28 12:00:00
78    Tag: Release_110_38
79    Description:
80    
81    This time for real!!!
82    
83    ----------------------------------------------------------------------
84    Name: Matthias Blume
85    Date: 2002/01/28 10:56:00 EST
86    Tag: blume-20020128-retraction
87    Description:
88    
89    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
90       with blume-Release_110_38-retracted.)
91    
92    1. Fixed a problem with incorrect rounding modes in real64.sml.
93       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
94    
95    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
96       and enums fixed.  The naming of corresponding ML identifiers should
97       now be consistent again.
98    
99    ----------------------------------------------------------------------
100    Name: Allen Leung
101    Date: 2002/01/27
102    Tag: leunga-20020127-nowhere
103    Description:
104    
105       Added a target called nowhere in the configuration scripts.
106       Enabling this will build the MLRISC 'nowhere' tool (for translating
107       programs with where-clauses into legal SML code) during installation.
108    
109    ----------------------------------------------------------------------
110    Name: Matthias Blume
111    Date: 2002/01/25 21:27:00 EST
112    Tag: blume-Release_110_38-retracted
113    Description:
114    
115    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
116    
117    README will be added later.
118    
119    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
120    (Release_110_38) removed.  Reason: Last-minute bug fixes.
121    
122    ----------------------------------------------------------------------
123    Name: Matthias Blume
124    Date: 2002/01/25
125    Tag: blume-20020125-ffi
126    Description:
127    
128    A large number of tweaks and improvements to ml-nlffi-lib and
129    ml-nlffigen:
130    
131       - ML represenation types have been streamlined
132       - getter and setter functions work with concrete values, not abstract
133         ones where possible
134       - ml-nlffigen command line more flexible (see README file there)
135       - some bugs have been fixed (hopefully)
136    
137    ----------------------------------------------------------------------
138    Name: Lal George
139    Date: 2002/01/24
140    Tag: george-20020124-risc-ra-interface
141    Description:
142    
143       There is a dramatic simplification in the interface to the
144       register allocator for RISC architectures as a result of making
145       parallel copy instructions explicit.
146    
147    ----------------------------------------------------------------------
148    Name: Matthias Blume
149    Date: 2002/01/22
150    Tag: blume-20020122-x86-ccalls
151    Description:
152    
153    Bug fix for c-calls on x86 (having to do with how char- and
154    short-arguments are being handled).
155    
156    ----------------------------------------------------------------------
157    Name: Matthias Blume
158    Date: 2002/01/21
159    Tag: blume-20020121-ff
160    Description:
161    
162    Another day of fiddling with the FFI...
163    
164    1. Bug fix/workaround:  CKIT does not complain about negative array
165       dimensions, so ml-nlffigen has to guard itself against this possibility.
166       (Otherwise a negative dimension would send it into an infinite loop.)
167    
168    2. Some of the abstract types (light objects, light pointers, most "base"
169       types) in structure C are now eqtypes.
170    
171    3. Added constructors and test functions for NULL function pointers.
172    
173    ----------------------------------------------------------------------
174    Name: Matthias Blume
175    Date: 2002/01/18
176    Tag: blume-20020118-ready-for-new-release
177    Description:
178    
179    Made config/srcarchiveurl point to a new place.  (Will provide boot
180    files shortly.)
181    
182    Maybe we christen this to be 110.38?
183    
184    ----------------------------------------------------------------------
185    Name: Matthias Blume
186    Date: 2002/01/18
187    Tag: blume-20020118-more-ffifiddle
188    Description:
189    
190    Today's FFI fiddling:
191    
192      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
193        C.Set.* that use concrete (MLRep.*) arguments and results instead
194        of abstract ones.
195    
196      - Provided word-style bit operations etc. for "int" representation
197        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
198        and Long.
199    
200    ----------------------------------------------------------------------
201    Name: Matthias Blume
202    Date: 2002/01/18
203    Tag: blume-20020118-use-x86-fp
204    Description:
205    
206    Now that x86-fast-fp seems to be working, I turned it back on again
207    by default.  (Seems to work fine now, even with the FFI.)
208    
209    Other than that, I added some documentation about the FFI to
210    src/ml-nlffigen/README and updated the FFI test examples in
211    src/ml-nlffi-lib/Tests/*.
212    
213    ----------------------------------------------------------------------
214    Name: Allen Leung
215    Date: 2002/01/17
216    Tag: leunga-20020117-x86-fast-fp-call
217    Description:
218    
219       1. Fixed a problem with handling return fp values when x86's fast fp
220          mode is turned on.
221    
222       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
223          of %f32.
224    
225       3. Added a constructor INT32lit to the ast of MLRISC tools.
226    
227    ----------------------------------------------------------------------
228    Name: Matthias Blume
229    Date: 2002/01/16
230    Tag: blume-20020116-ffifiddle
231    Description:
232    
233    More fiddling with the FFI interface:
234    
235     - Make constness 'c instead of rw wherever possible.  This eliminates
236       the need for certain explicit coercions.  (However, due to ML's
237       value polymorphism, there will still be many cases where explicit
238       coercions are necessary.  Phantom types are not the whole answer
239       to modeling a subtyping relationship in ML.)
240    
241     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
242    
243     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
244       clumsy workaround for varargs problem.)
245    
246    ----------------------------------------------------------------------
247    Name: Lal George
248    Date: 2002/01/15
249    Tag: <none>
250    Description:
251    
252    1. Since COPY instructions are no longer native to the architecture,
253       a generic functor can be used to implement the expandCopies function.
254    
255    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
256       TEXT segment.
257    
258    ----------------------------------------------------------------------
259    Name: Matthias Blume
260    Date: 2002/01/15
261    Tag: blume-20020115-ffiupdates
262    Description:
263    
264    1. Fix for bug resulting in single-precision float values being returned
265       incorrectly from FFI calls.
266    
267    2. Small modifications to C FFI API:
268    
269        - memory-allocation routines return straight objects (no options)
270          and raise an exception in out-of-memory situations
271        - unsafe extensions to cast between function pointers and pointers
272          from/to ints
273        - added structure C_Debug as an alternative to structure C where
274          pointer-dereferencing (|*| and |*!) always check for null-pointers
275        - added open_lib' to DynLinkage;  open_lib' works like open_lib
276          but also takes a (possibly empty) list of existing library handles
277          that the current library depends on
278    
279    ----------------------------------------------------------------------
280    Name: Matthias Blume
281    Date: 2002/01/10
282    Tag: blume-20020110-newffigen
283    Description:
284    
285    1. Updates to portable graph code.
286    
287    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
288       more scalable now so that even huge interfaces such as the one
289       for GTK compile in finite time and space. :-)
290       See src/ml-nlffigen/README for details on what's new.
291    
292    ----------------------------------------------------------------------
293    Name: Lal George
294    Date: 2001/01/09 14:31:35 EST 2002
295    Tag: george-20011206-rm-native-copy
296    Description:
297    
298            Removed the native COPY and FCOPY instructions
299            from all the architectures and replaced it with the
300            explicit COPY instruction from the previous commit.
301    
302            It is now possible to simplify many of the optimizations
303            modules that manipulate copies. This has not been
304            done in this change.
305    
306    ----------------------------------------------------------------------
307    Name: Lal George
308    Date: 2001/12/06 16:50:13 EST 2001
309    Tag: george-20011206-mlrisc-instruction
310    Description:
311    
312    Changed the representation of instructions from being fully abstract
313    to being partially concrete. That is to say:
314    
315      from
316            type instruction
317    
318      to
319            type instr                              (* machine instruction *)
320    
321            datatype instruction =
322                LIVE of {regs: C.cellset, spilled: C.cellset}
323              | KILL of {regs: C.cellset, spilled: C.cellset}
324              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
325              | ANNOTATION of {i: instruction, a: Annotations.annotation}
326              | INSTR of instr
327    
328    This makes the handling of certain special instructions that appear on
329    all architectures easier and uniform.
330    
331    LIVE and KILL say that a list of registers are live or killed at the
332    program point where they appear. No spill code is generated when an
333    element of the 'regs' field is spilled, but the register is moved to
334    the 'spilled' (which is present, more for debugging than anything else).
335    
336    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
337    We used to generate:
338    
339            DEFFREG f1
340            f1 := f2 + f3
341            trapb
342    
343    but now generate:
344    
345            f1 := f2 + f3
346            trapb
347            LIVE {regs=[f1,f2,f3], spilled=[]}
348    
349    Furthermore, the DEFFREG (hack) required that all floating point instruction
350    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
351    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
352    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
353    this architecture).
354    
355    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
356    all the architectures. This will result in further simplification of the
357    register allocator that must be aware of them for coalescing purposes, and
358    will also simplify certain aspects of the machine description that provides
359    callbacks related to parallel copies.
360    
361    ANNOTATION should be obvious, and now INSTR represents the honest to God
362    machine instruction set!
363    
364    The <arch>/instructions/<arch>Instr.sml files define certain utility
365    functions for making porting easier -- essentially converting upper case
366    to lower case. All machine instructions (of type instr) are in upper case,
367    and the lower case form generates an MLRISC instruction. For example on
368    the alpha we have:
369    
370      datatype instr =
371         LDA of {r:cell, b:cell, d:operand}
372       | ...
373    
374      val lda : {r:cell, b:cell, d:operand} -> instruction
375        ...
376    
377    where lda is just (INSTR o LDA), etc.
378    
379    ----------------------------------------------------------------------
380    Name: Matthias Blume
381    Date: 2001/11/22 21:40:00 EST
382    Tag: Release_110_37
383    Description:
384    
385    Release 110.37.  This time for real.
386    
387    ----------------------------------------------------------------------
388    Name: Matthias Blume
389    Date: 2001/11/21 16:35:00 EST
390    Tag: blume-20011121-foot-in-mouth
391    Description:
392    
393    Removed the "Release_110_37" tag because of a serious bug.
394    This will be re-tagged once the bug is fixed.
395    
396    ----------------------------------------------------------------------
397    Name: Matthias Blume
398    Date: 2001/11/21 16:14:00 EST
399    Tag: blume-20011121-forgottenfile
400    Description:
401    
402    Forgot to add a file.  (Just a .tex-file -- part of
403    the CM manual source.)
404    
405    ----------------------------------------------------------------------
406    Name: Matthias Blume
407    Date: 2001/11/21 16:10:00 EST
408    Tag: blume-20011121-invalid_110_37
409    Description:
410    
411    Note: I removed the original tag "Release_110_37" from this commit
412          because we found a serious bug in all non-x86 backends.
413          - Matthias
414    
415    1. Modifications to the SML/NJ code generator and to the runtime system
416       so that code object name strings are directly inserted into code
417       objects at code generation time.  The only business the runtime system
418       has with this is now to read the name strings on occasions.
419       (The encoding of the name string has also changed somewhat.)
420    
421    2. CM now implements a simple "set calculus" for specifying export lists.
422       In particular, it is now possible to refer to the export lists of
423       other libraries/groups/sources and form unions as well as differences.
424       See the latest CM manual for details.
425    
426    3. An separate notion of "proxy" libraries has again be eliminated from
427       CM's model.  (Proxy libraries are now simply a special case of using
428       the export list calculus.)
429    
430    4. Some of the existing libraries now take advantage of the new set
431       calculus.
432       (Notice that not all libraries have been converted because some
433       of the existing .cm-files are supposed to be backward compatible
434       with 110.0.x.)
435    
436    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
437       "General.exnMessage"!  The former relies on a certain hook to be
438       initialized, and that often does not happen in the stand-alone case.)
439    
440    ----------------------------------------------------------------------
441    Name: Lal George
442    Date: 2001/11/21  13:56:18 EST
443    Tag: george-2001121-pseudo-ops
444    Description:
445    
446      Implemented a complete redesign of MLRISC pseudo-ops. Now there
447      ought to never be any question of incompatabilities with
448      pseudo-op syntax expected by host assemblers.
449    
450      For now, only modules supporting GAS syntax are implemented
451      but more should follow, such as MASM, and vendor assembler
452      syntax, e.g. IBM as, Sun as, etc.
453    
454    ----------------------------------------------------------------------
455    Name: Matthias Blume
456    Date: 2001/11/14 11:52:00 EST
457    Tag: blume-20011114-srcname
458    Description:
459    
460    1. Routed the name of the current source file to mlriscgen where it
461       should be directly emitted into the code object.  (This last part
462       is yet to be done.)
463    
464    2. Some cleanup of the pgraph code to make it match the proposal that
465       I put out the other day.  (The proposal notwithstanding, things are
466       still in flux here.)
467    
468    ----------------------------------------------------------------------
469    Name: Lal George
470    Date: 2001/11/14 09:44:04 EST
471    Tag:
472    Description:
473    
474      Fix for a backpatching bug reported by Allen.
475    
476      Because the boundary between short and long span-dependent
477      instructions is +/- 128, there are an astounding number of
478      span-dependent instructions whose size is over estimated.
479    
480      Allen came up with the idea of letting the size of span
481      dependent instructions be non-monotonic, for a maxIter
482      number of times, after which the size must be monotonically
483      increasing.
484    
485      This table shows the number of span-dependent instructions
486      whose size was over-estimated as a function of maxIter, for the
487      file Parse/parse/ml.grm.sml:
488    
489         maxIter            # of instructions:
490            10                      687
491            20                      438
492            30                      198
493            40                        0
494    
495      In compiling the compiler, there is no significant difference in
496      compilation speed between maxIter=10 and maxIter=40. Actually,
497      my measurements showed that maxIter=40 was a tad faster than
498      maxIter=10! Also 96% of the  files in the compiler reach a fix
499      point within 13 iterations, so fixing maxIter at 40, while high,
500      is okay.
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume
504    Date: 2001/10/31 15:25:00 EST
505    Tag: blume-20011031-pgraph
506    Description:
507    
508    CKIT:
509    * Changed the "Function" constructor of type Ast.ctype to carry optional
510      argument identifiers.
511    * Changed the return type of TypeUtil.getFunction accordingly.
512    * Type equality ignores the argument names.
513    * TypeUtil.composite tries to preserve argument names but gives up quickly
514      if there is a mismatch.
515    
516    installation script:
517    * attempts to use "curl" if available (unless "wget" is available as well)
518    
519    CM:
520    * has an experimental implementation of "portable graphs" which I will
521      soon propose as an implementation-independent library format
522    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
523    
524    NLFFI-LIB:
525    * some cleanup (all cosmetic)
526    
527    NLFFIGEN:
528    * temporarily disabled the mechanism that suppresses ML output for
529      C definitions whose identifiers start with an underscore character
530    * generate val bindings for enum constants
531    * user can request that only one style (light or heavy) is being used;
532      default is to use both (command-line arguments: -heavy and -light)
533    * fixed bug in handling of function types involving incomplete pointers
534    * generate ML entry points that take record arguments (i.e., using
535      named arguments) for C functions that have a prototype with named
536      arguments
537      (see changes to CKIT)
538    
539    ----------------------------------------------------------------------
540    Name: Allen Leung
541    Date: 2001/10/27 20:34:00 EDT
542    Tag: leunga-20011027-x86-fast-fp-call
543    Description:
544    
545       Fixed the bug described in blume-20010920-slowfp.
546    
547       The fix involves
548          1. generating FCOPYs in FSTP in ia32-svid
549          2. marking a CALL with the appropriate annotation
550    
551    ----------------------------------------------------------------------
552    Name: Matthias Blume
553    Date: 2001/10/16 11:32:00 EDT
554    Tag: blume-20011016-netbsd
555    Description:
556    
557    Underscore patch from Chris Richards (fixing problem with compiling
558    runtime system under recent NetBSD).
559    
560    ----------------------------------------------------------------------
561    Name: Allen Leung
562    Date: 2001/10/12 17:18:32 EDT 2001
563    Tag: leung-20011012-x86-printflowgraph
564    Description:
565    
566    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
567    
568    ----------------------------------------------------------------------
569    Name: Lal George
570    Date: 2001/10/11 23:51:34 EDT
571    Tag: george-20011011-too-many-instrs
572    Description:
573    
574    The representation of a program point never expected to see more
575    than 65536 instructions in a basic block!
576    
577    ----------------------------------------------------------------------
578    Name: Lal George
579    Date: 2001/10/09 09:41:37 EDT
580    Tag: george-20011008-mlrisc-labels
581    Description:
582    
583    Changed the machine description files to support printing of
584    local and global labels in assembly code, based on host assembler
585    conventions.
586    
587    ----------------------------------------------------------------------
588    Name: Matthias Blume
589    Date: 2001/09/25 15:25:00 EDT
590    Tag: blume-20010925-exninfo
591    Description:
592    
593    I provided a non-hook implementation of exnName (at the toplevel) and
594    made the "dummy" implementation of exnMessage (at the toplevel) more
595    useful: if nothing gets "hooked in", then at least you are going to
596    see the exception name and a message indicating why you don't see more.
597    
598    [For the time being, programs that need exnMessage and want to use
599    ml-build should either use General.exnMessage (strongly recommended) or
600    refer to structure General at some other point so that CM sees a
601    static dependency.]
602    
603    [Similar remarks go for "print" and "use":  If you want to use their
604    functionality in stand-alone programs generated by ml-build, then use
605    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
606    
607    ----------------------------------------------------------------------
608    Name: Matthias Blume
609    Date: 2001/09/20 17:28:00 EDT
610    Tag: blume-20010920-slowfp
611    Description:
612    
613    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
614    
615    ----------------------------------------------------------------------
616    Name: Matthias Blume
617    Date: 2001/09/20 17:20:00 EDT
618    Tag: blume-20010920-canonicalpaths
619    Description:
620    
621    0. Updated the BOOT file (something that I forgot to do earlier).
622    
623    1. Small internal change to CM so that it avoids "/../" in filenames
624       as much as possible (but only where it is safe).
625    
626    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
627       that arguments that contain delimiters are passed through correctly.
628       This change also means that all "special" arguments of the form
629       @SMLxxx... must come first.
630    
631    3. Changed install script to put relative anchor names for tool commands
632       into pathconfig.
633    
634    ----------------------------------------------------------------------
635    Name: Matthias Blume
636    >>>>>>> 1.169
637    Date: 2001/09/18 15:35:00 EDT
638    Tag: blume-20010918-readme11036
639    Description:
640    
641    Added README files.
642    
643    ----------------------------------------------------------------------
644    Name: Matthias Blume
645    Date: 2001/09/18 11:45:00 EDT
646    Tag: Release_110_36 (retag)
647    Description:
648    
649    Fixed mistake in config/preloads. Retagged as 110.36.
650    
651    ----------------------------------------------------------------------
652    Name: Matthias Blume
653    Date: 2001/09/18 09:40:00 EDT
654    Tag: Release_110_36_orig (tag changed)
655    Description:
656    
657    New version (110.36).  New bootfiles.
658    
659    ----------------------------------------------------------------------
660    Name: Matthias Blume
661    Date: 2001/09/14 16:15:00 EDT
662    Tag: blume-20010914-x86fastfp
663    Description:
664    
665    John committed some changes that Allen made, in particular a (hopefully)
666    correctly working version of the x86-fp module.
667    
668    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
669    flag to "true".  Everything seems to compile to a fixpoint ok, and
670    "mandelbrot" speeds up by about 15%.
671    
672    ----------------------------------------------------------------------
673    Name: Matthias Blume
674    Date: 2001/09/13 11:20:00 EDT
675    Tag: blume-20010913-minimal
676    Description:
677    
678    1. Stefan Monnier's patch to fix a miscompilation problem that
679       was brought to light by John Reppy's work on Moby.
680    
681    2. Implemented a minimal "structure Compiler" that contains just
682       "version" and "architecture".  The minimal version will be
683       available when the full version is not.  This is for backward-
684       compatibility with code that wants to test Compiler.version.
685    
686    ----------------------------------------------------------------------
687    Name: Matthias Blume
688    Date: 2001/08/28 14:03:00 EDT
689    Tag: blume-20010828-ml-lex
690    Description:
691    
692    Fix for bug 1581, received from Neophytos Michael.
693    
694    ----------------------------------------------------------------------
695    Name: Matthias Blume
696    Date: 2001/08/27 11:20:00 EDT
697    Tag: blume-20010827-readme11035
698    Description:
699    
700    Fleshed out the README file for 110.35.
701    
702    ----------------------------------------------------------------------
703    Name: Matthias Blume
704    Date: 2001/08/24 17:10:00 EDT
705    Tag: Release_110_35
706    Description:
707    
708    New version number (110.35).  New bootfiles.
709    
710    ----------------------------------------------------------------------
711    Name: Lal George
712    Date: 2001/08/24 13:47:18 EDT 2001
713    Tag: george-20010824-MLRISC-graphs
714    Description:
715    
716     removed clusters from MLRISC completely and replaced with graphs.
717    
718    ----------------------------------------------------------------------
719    Name: Matthias Blume
720    Date: 2001/08/23 17:50:00 EDT
721    Tag: blume-20010823-toplevel
722    Description:
723    
724    - some reorganization of the code that implements various kinds of
725      environments in the compiler (static, dynamic, symbolic, combined)
726    - re-implemented the EnvRef module so that evalStream works properly
727      (if the stream contains references to "use", "CM.make", etc.)
728    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
729    
730    ----------------------------------------------------------------------
731    Name: Matthias Blume
732    Date: 2001/08/20 15:50 EDT
733    Tag: blume20010820-slipup
734    Description:
735    
736    I forgot to commit a few files.  Here they are...
737    
738    ----------------------------------------------------------------------
739    Name: Matthias Blume
740    Date: 2001/08/20 15:35:00 EDT
741    Tag: blume-20010820-debugprof
742    Description:
743    
744    !!!! NEW BOOTFILES !!!!
745    
746    This is another round of reorganizing the compiler sources.  This
747    time the main goal was to factor out all the "instrumentation"
748    passes (for profiling and backtracing) into their own library.
749    The difficulty was to do it in such a way that it does not depend
750    on elaborate.cm but only on elabdata.cm.
751    
752    Therefore there have been further changes to both elaborate.cm and
753    elabdata.cm -- more "generic" things have been moved from the former
754    to the latter.  As a result, I was forced to split the assignment
755    of numbers indicating "primtyc"s into two portions: SML-generic and
756    SML/NJ-specific.  Since it would have been awkward to maintain,
757    I bit the bullet and actually _changed_ the mapping between these
758    numbers and primtycs.  The bottom line of this is that you need
759    a new set of bin- and bootfiles.
760    
761    I have built new bootfiles for all architectures, so doing a fresh
762    checkout and config/install.sh should be all you need.
763    
764    The newly created library's name is
765    
766        $smlnj/viscomp/debugprof.cm
767    
768    and its sources live under
769    
770        src/compiler/DebugProf
771    
772    ----------------------------------------------------------------------
773    Name: Matthias Blume
774    Date: 2001/08/15 17:15:00 EDT
775    Tag: blume-20010815-compreorg
776    Description:
777    
778    This is a first cut at reorganizing the CM libraries that make up the
779    core of the compiler.  The idea is to separate out pieces that could
780    be used independently by tools, e.g., the parser, the typechecker, etc.
781    
782    The current status is a step in this direction, but it is not quite
783    satisfactory yet.  Expect more changes in the future.
784    
785    Here is the current (new) organization...
786    
787        What used to be $smlnj/viscomp/core.cm is now divided into
788        six CM libraries:
789    
790             $smlnj/viscomp/basics.cm
791                           /parser.cm
792                           /elabdata.cm
793                           /elaborate.cm
794                           /execute.cm
795                           /core.cm
796    
797        The CM files for these libraries live under src/system/smlnj/viscomp.
798        All these libraries are proxy libraries that contain precisely
799        one CM library component.  Here are the locations of the components
800        (all within the src/compiler tree):
801    
802             Basics/basics.cm
803             Parse/parser.cm
804             ElabData/elabdata.cm
805             Elaborator/elaborate.cm
806             Execution/execute.cm
807             core.cm
808    
809         [This organization is the same that has been used already
810         for a while for the architecture-specific parts of the visible
811         compiler and for the old version of core.cm.]
812    
813         As you will notice, many source files have been moved from their
814         respective original locations to a new home in one of the above
815         subtrees.
816    
817         The division of labor between the new libraries is the following:
818    
819             basics.cm:
820                - Simple, basic definitions that pertain to many (or all) of
821                  the other libraries.
822             parser.cm:
823                - The SML parser, producing output of type Ast.dec.
824                - The type family for Ast is also defined and exported here.
825             elabdata.cm:
826                - The datatypes that describe input and output of the elaborator.
827                  This includes types, absyn, and static environments.
828             elaborator.cm:
829                - The SML/NJ type checker and elaborator.
830                  This maps an Ast.dec (with a given static environment) to
831                  an Absyn.dec (with a new static environment).
832                - This libraries implements certain modules that used to be
833                  structures as functors (to remove dependencies on FLINT).
834             execute.cm:
835                - Everything having to do with executing binary code objects.
836                - Dynamic environments.
837             core.cm:
838                - SML/NJ-specific instantiations of the elaborator and MLRISC.
839                - Top-level modules.
840                - FLINT (this should eventually become its own library)
841    
842    Notes:
843    
844    I am not 100% happy with the way I separated the elaborator (and its
845    data structures) from FLINT.  Two instances of the same problem:
846    
847        1. Data structures contain certain fields that carry FLINT-specific
848           information.  I hacked around this using exn and the property list
849           module from smlnj-lib.  But the fact that there are middle-end
850           specific fields around at all is a bit annoying.
851    
852        2. The elaborator calculates certain FLINT-related information.  I tried
853           to make this as abstract as I could using functorization, but, again,
854           the fact that the elaborator has to perform calculations on behalf
855           of the middle-end at all is not nice.
856    
857        3. Having to used exn and property lists is unfortunate because it
858           weakens type checking.  The other alternative (parameterizing
859           nearly *everything*) is not appealing, though.
860    
861    I removed the "rebinding =" warning hack because due to the new organization
862    it was awkward to maintain it.  As a result, the compiler now issues some of
863    these warnings when compiling init.cmi during bootstrap compilation. On
864    the plus side, you also get a warning when you do, for example:
865       val op = = Int32.+
866    which was not the case up to now.
867    
868    I placed "assign" and "deref" into the _Core structure so that the
869    code that deals with the "lazy" keyword can find them there.  This
870    removes the need for having access to the primitive environment
871    during elaboration.
872    
873    ----------------------------------------------------------------------
874    Name: Matthias Blume
875    Date: 2001/08/13
876    Tag: blume-20010813-closures
877    Description:
878    
879    This fix was sent to us by Zhong Shao.  It is supposed to improve the
880    performance of certain loops by avoiding needless closure allocation.
881    
882    ----------------------------------------------------------------------
883    Name: Lal George
884    Date: 2001/07/31 10:03:23 EDT 2001
885    Tag: george-20010731-x86-fmalloc
886    Description: Fixed bug in x86 calls
887    
888        There was a bug where call instructions would mysteriously
889        vanish. The call instruction had to be one that returned
890        a floating point value.
891    
892    ----------------------------------------------------------------------
893    Name: Lal George
894    Date: 2001/07/19 16:36:29 EDT 2001
895    Tag: george-20010719-simple-cells
896    Description:
897    
898    I have dramatically simplified the interface for CELLS in MLRISC.
899    
900    In summary, the cells interface is broken up into three parts:
901    
902      1. CellsBasis : CELLS_BASIS
903    
904            CellsBasis is a top level structure and common for all
905            architectures.  it contains the definitions of basic datatypes
906            and utility  functions over these types.
907    
908      2. functor Cells() : CELLS
909    
910            Cells generates an interface for CELLS that incorporates the
911            specific resources on the target architecture, such as the
912            presence of special register classes, their number and size,
913            and various useful substructures.
914    
915      3. <ARCH>CELLS
916    
917            e.g. SparcCells: SPARCCELLS
918    
919            <ARCH>CELLS usually contains additional bindings for special
920            registers  on the architecture, such as:
921    
922                    val r0 : cell           (* register zero *)
923                    val y : cell            (* Y register *)
924                    val psr : cell          (* processor status register *)
925                    ...
926    
927            The structure returned by applying the Cells functor is opened
928            in this interface.
929    
930    The main implication of all this is that the datatypes for cells is
931    split between CellsBasis and CELLS -- a fairly simple change for user
932    code.
933    
934    In the old scheme the CELLS interface had a definitional binding of
935    the form:
936    
937            signature CELLS = sig
938    
939               structure CellsBasis = CellsBasis
940    
941               ...
942    
943            end
944    
945    With all the sharing constraints that goes on in MLRISC, this old
946    design  quickly leads to errors such as:
947    
948            "structure definition spec inside of sharing ... "
949    
950    
951    and appears to require an unacceptable amount of sharing and where
952    constraint hackery.
953    
954    I think this error message (the interaction of definitional specs and
955    sharing) requires more explanation on our web page.
956    
957    ----------------------------------------------------------------------
958    Name: Matthias Blume
959    Date: 2001/07/19 15:00:00 EDT
960    Tag: blume-20010719-libreorg
961    Description:
962    
963    This update puts together a fairly extensive but straightforward change
964    to the way the libraries that implement the interactive system are
965    organized:
966    
967       The biggest change is the elimination of structure Compiler.  As a
968       replacement for this structure, there is now a CM library
969       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
970       that exports all the substructures of the original structure Compiler
971       directly.  So instead of saying Compiler.Foo.bar one now simply
972       says Foo.bar.  (The CM libraries actually export a collection of
973       structures that is richer than the collection of substructures of
974       structure Compiler.)
975    
976       To make the transition smooth, there is a separate library called
977       $smlnj/compiler/compiler.cm which puts together and exports the
978       original structure Compiler (or at least something very close to it).
979    
980       There are five members of the original structure Compiler
981       that are not exported directly but which instead became members
982       of a new structure Backend (described by signature BACKEND).  These are:
983       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
984       Interact (: INTERACT), structure Machine (: MACHINE), and val
985       architecture (: string).
986    
987       Structure Compiler.Version has become structure CompilerVersion.
988    
989       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
990       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
991       or x86, respectively.
992       Each of these exports the same frontend structures that
993       $smlnj/compiler.cm exports.  But they do not have a structure Backend
994       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
995       Hppa, PPC, Sparc, or X86, respectively.
996    
997       Library $smlnj/compiler/all.cm exports the union of the exports of
998       $smlnj/compiler/<arch>.cm
999    
1000       There are no structures <Arch>Compiler anymore, use
1001       $smlnj/compiler/<arch>.cm instead.
1002    
1003       Library host-compiler-0.cm is gone.  Instead, the internal library
1004       that instantiates CM is now called cm0.cm.  Selection of the host
1005       compiler (backend) is no longer done here but. (Responsibility for it
1006       now lies with $smlnj/compiler/current.cm.  This seems to be more
1007       logical.)
1008    
1009       Many individual files have been moved or renamed.  Some files have
1010       been split into multiple files, and some "dead" files have been deleted.
1011    
1012    Aside from these changes to library organization, there are also changes
1013    to the way the code itself is organized:
1014    
1015       Structure Binfile has been re-implemented in such a way that it no
1016       longer needs any knowledge of the compiler.  It exclusively deals
1017       with the details of binfile layout.  It no longer invokes the
1018       compiler (for the purpose of creating new prospective binfile
1019       content), and it no longer has any knowledge of how to interpret
1020       pickles.
1021    
1022       Structure Compile (: COMPILE) has been stripped down to the bare
1023       essentials of compilation.  It no longer deals with linking/execution.
1024       The interface has been cleaned up considerably.
1025    
1026       Utility routines for dealing with linking and execution have been
1027       moved into their own substructures.
1028    
1029       (The ultimate goal of these changes is to provide a light-weight
1030       binfile loader/linker (at least for, e.g., stable libraries) that
1031       does not require CM or the compiler to be present.)
1032    
1033    CM documentation has been updated to reflect the changes to library
1034    organization.
1035    
1036    ----------------------------------------------------------------------
1037    Name: Matthias Blume
1038    Date: 2001/07/10 17:30:00 EDT
1039    Tag: Release_110_34
1040    Description:
1041    
1042    Minor tweak to 110.34 (re-tagged):
1043    
1044      - README.html file added to CVS repository
1045      - runtime compiles properly under FreeBSD 3.X and 4.X
1046    
1047    ----------------------------------------------------------------------
1048    Name: Matthias Blume
1049    Date: 2001/07/10 17:30:00 EDT
1050    Tag: Release_110_34
1051    Description:
1052    
1053    New version number (110.34). New bootfiles.
1054    
1055    ----------------------------------------------------------------------
1056    Name: Matthias Blume
1057    Date: 2001/07/09 16:00:00 EDT
1058    Tag: blume-20010709-more-varargs
1059    Description:
1060    
1061    I changed the handling of varargs in ml-nlffigen again:
1062    The ellipsis ... will now simply be ignored (with an accompanying warning).
1063    
1064    The immediate effect is that you can actually call a varargs function
1065    from ML -- but you can't actually supply any arguments beyond the ones
1066    specified explicitly.  (For example, you can call printf with its format
1067    string, but you cannot pass additional arguments.)
1068    
1069    This behavior is only marginally more useful than the one before, but
1070    it has the advantage that a function or, more importantly, a function
1071    type never gets dropped on the floor, thus avoiding follow-up problems with
1072    other types that refer to the offending one.
1073    
1074    ----------------------------------------------------------------------
1075    Name: Matthias Blume
1076    Date: 2001/07/09 11:25:00 EDT
1077    Tag: blume-20010709-varargs
1078    Description:
1079    
1080    1. ckit-lib.cm now exports structure Error
1081    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1082       with a warning accompanied by a source location.  Moreover, it
1083       merely skips the offending function or type and proceeds with the
1084       rest of its work.u  As a result, one can safely feed C code containing
1085       "..." to ml-nlffigen.
1086    3. There are some internal improvements to CM, providing slightly
1087       more general string substitutions in the tools subsystem.
1088    
1089    ----------------------------------------------------------------------
1090    Name: Matthias Blume
1091    Date: 2001/06/27 15:10:00 EDT
1092    Tag: blume-20010627-concur
1093    Description:
1094    
1095    Fixed a small bug in CM's handling of parallel compilation.
1096    (You could observe the bug by Control-C-interrupting an ordinary
1097    CMB.make or CM.stabilize and then attaching some compile servers.
1098    The result was that all of a sudden the previously interrupted
1099    compilation would continue on its own.  This was because of
1100    an over-optimization: CM did not bother to clean out certain queues
1101    when no servers were attached "anyway", resulting in the contents
1102    of these queues to grab control when new servers did get attached.)
1103    
1104    There is also another minor update to the CM manual.
1105    
1106    ----------------------------------------------------------------------
1107    Name: Matthias Blume
1108    Date: 2001/06/26 16:15:00 EDT
1109    Tag: blume-20010626-cmdoc
1110    Description:
1111    
1112    Minor typo fixed in CM manual (syntax diagram for libraries).
1113    
1114    ----------------------------------------------------------------------
1115    Name: Matthias Blume
1116    Date: 2001/06/25 22:55:00 EDT
1117    Tag: blume-20010625-x86pc
1118    Description:
1119    
1120    Fixed a nasty bug in the X86 assembly code that caused signal
1121    handlers to fail (crash) randomly.
1122    
1123    ----------------------------------------------------------------------
1124    Name: Matthias Blume
1125    Date: 2001/06/25 12:05:00 EDT
1126    Tag: blume-20010625-nlffigen
1127    Description:
1128    
1129    This update fixes a number of minor bugs in ml-nlffigen as reported by
1130    Nick Carter <nbc@andrew.cmu.edu>.
1131    
1132      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1133      2. Default names for generated files are now derived from the name of
1134         the C file *without its directory*.  In particular, this causes generated
1135         files to be placed locally even if the C file is in some system directory.
1136      3. Default names for generated signatures and structures are also derived
1137         from the C file name without its directory.  This avoids silly things
1138         like "structure GL/GL".
1139         (Other silly names are still possible because ml-nlffigen does not do
1140          a thorough check of whether generated names are legal ML identifiers.
1141          When in doubt, use command line arguments to force particular names.)
1142    
1143    ----------------------------------------------------------------------
1144    Name: Matthias Blume
1145    Date: 2001/06/21 12:25:00 EDT
1146    Tag: blume-20010621-eXene
1147    Description:
1148    
1149    eXene now compiles and (sort of) works again.
1150    
1151    The library name (for version > 110.33) is $/eXene.cm.
1152    
1153    I also added an new example in src/eXene/examples/nbody.  See the
1154    README file there for details.
1155    
1156    ----------------------------------------------------------------------
1157    Name: Matthias Blume
1158    Date: 2001/06/20 16:40:00 EDT
1159    Tag: blume-20010620-cml
1160    Description:
1161    
1162    CML now compiles and works again.
1163    
1164    Libraries (for version > 110.33):
1165    
1166      $cml/cml.cm            Main CML library.
1167      $cml/basis.cm          CML's version of $/basis.cm.
1168      $cml/cml-internal.cm   Internal helper library.
1169      $cml/core-cml.cm       Internal helper library.
1170      $cml-lib/trace-cml.cm  Tracing facility.
1171      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1172    
1173    The installer (config/install.sh) has been taught how to properly
1174    install this stuff.
1175    
1176    ----------------------------------------------------------------------
1177    Name: Matthias Blume
1178    Date: 2001/06/19 17:55:00 EDT
1179    Tag: blume-20010619-instantiate
1180    Description:
1181    
1182    This un-breaks the fix for bug 1432.
1183    (The bug was originally fixed in 110.9 but I broke it again some
1184    time after that.)
1185    
1186    ----------------------------------------------------------------------
1187    Name: Matthias Blume
1188    Date: 2001/06/19 17:25:00 EDT
1189    Tag: blume-20010619-signals
1190    Description:
1191    
1192    This should (hopefully) fix the long-standing signal handling bug.
1193    (The runtime system was constructing a continuation record with an
1194    incorrect descriptor which would cause the GC to drop data on the floor...)
1195    
1196    ----------------------------------------------------------------------
1197    Name: Matthias Blume
1198    Date: 2001/06/15 15:05:00 EDT
1199    Tag: blume-20010615-moresparc
1200    Description:
1201    
1202    Here is a short late-hour update related to Sparc c-calls:
1203    
1204     -- made handling of double-word arguments a bit smarter
1205    
1206     -- instruction selection phase tries to collapse certain clumsily
1207        constructed ML-Trees; typical example:
1208    
1209            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1210    
1211        This currently has no further impact on SML/NJ since mlriscGen does
1212        not seem to generate such patterns in the first place, and c-calls
1213        (which did generate them in the beginning) has meanwhile been fixed
1214        so as to avoid them as well.
1215    
1216    ----------------------------------------------------------------------
1217    Name: Matthias Blume
1218    Date: 2001/06/15 15:05:00 EDT
1219    Tag: blume-20010615-sparc
1220    Description:
1221    
1222    The purpose of this update is to provide an implementation of NLFFI
1223    on Sparc machines.
1224    
1225    Here are the changes in detail:
1226    
1227       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1228       the Sparc implementation of the c-calls API.
1229       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1230       for accessing the ML frame.  Thus, we have a real frame pointer and
1231       can freely modify %sp without need for an omit-frame-ptr phase.
1232       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1233       this case.
1234       * ml-nlffigen has been taught to produce code for different architectures
1235       and calling conventions.
1236       * In a way similar to what was done in the x86 case, the Sparc
1237       backend uses its own specific extension to mltree.  (For example,
1238       it needs to be able to generate UNIMP instructions which are part
1239       of the calling convention.)
1240       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1241       to make it easier to plug in new machine- and os-dependent parts).
1242    
1243    There are some other fairly unrelated bug fixes and cleanups as well:
1244    
1245       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1246       that they properly share their libraries with existing SML/NJ libraries.
1247       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1248       follow-up error messages.
1249       * Updates to CM/CMB documentation.
1250    
1251    TODO items:
1252    
1253       * MLRISC should use a different register as its asmTemp on the Sparc.
1254         (The current %o2 is a really bad choice because it is part of the
1255         calling conventions, so things might interfere in unexpected ways.)
1256    
1257    ----------------------------------------------------------------------
1258    Name: Matthias Blume
1259    Date: 2001/06/07
1260    Tag: blume-20010607-calls
1261    Description:
1262    
1263    A number of internal changes related to C calls and calling conventions:
1264    
1265    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1266       number of bytes popped implicitly (by the callee).  In most cases
1267       this field is 0 but on x86/win32 it is some non-zero value.  This
1268       is information provided for the benefit of the "omit-frameptr" pass.
1269    2. The CALL instruction on the x86 carries a similar "pops" field.
1270       The instruction selection phase copies its value from the ML-Tree
1271       CALL statement.
1272    3. On all other architectures, the instruction selection phase checks
1273       whether "pops=0" and complains if not.
1274    4. The c-calls implementation for x86 now accepts two calling conventions:
1275       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1276       up after the call and pops is set to 0.  For "stdcall", the caller
1277       does nothing, leaving the cleanup to the callee; pops is set to
1278       the number of bytes that were pushed onto the stack.
1279    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1280       distinguish between "ccall" and "stdcall".
1281    6. The UNIMP instruction has been added to the supported Sparc instruction
1282       set. (This is needed for implementing the official C calling convention
1283       on this architecture.)
1284    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1285       work with the latest CM.
1286    
1287    ----------------------------------------------------------------------
1288    Name: Matthias Blume
1289    Date: 2001/06/05 15:10:00 EDT
1290    Tag: blume-20010605-cm-index
1291    Description:
1292    
1293    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1294    
1295    1. CM can now generate "index files".  These are human-readable files
1296       that list on a per-.cm-file basis each toplevel symbol defined or
1297       imported.  The location of the index file for
1298       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1299       To enable index-file generation, set CM.Control.generate_index to true
1300       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1301    
1302       The CM manual has been updated accordingly.
1303    
1304    2. I made some slight modifications to the c-calls API in MLRISC.
1305    
1306         a) There is now a callback to support saving/restoring of
1307            dedicated but caller-save registers around the actual call
1308            instruction.
1309         b) One can optionally specify a comment-annotation for the
1310            call instruction.
1311    
1312    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1313       (For example, the comment annotation shows the C prototype of
1314        the function being called.)
1315    
1316    ----------------------------------------------------------------------
1317    Name: Matthias Blume
1318    Date: 2001/06/01 13:30:00 EDT
1319    Tag: blume-20010601-nlffi-cleanup
1320    Description:
1321    
1322    This is mostly a cleanup of MLFFI stuff:
1323    
1324       - some signature files have been put into a more exposed place
1325       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1326       - ml-nlffigen changed accordingly
1327       - tutorial updated
1328    
1329    Other changes:
1330    
1331       - author's affiliation in CM manual(s) updated
1332       - some more recognized keywords added to Allen's sml.sty
1333    
1334    ----------------------------------------------------------------------
1335    Name: Matthias Blume
1336    Date: 2001/05/25 15:30:00 EDT
1337    Tag: blume-20010525-iptr
1338    Description:
1339    
1340      - put the official 110.33-README (as it appears on the ftp server) under
1341        CVS
1342      - fixed a small bug related to incomplete pointer types in
1343        ml-nlffigen
1344      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1345        (it does not need the 'f type parameter)
1346    
1347    ----------------------------------------------------------------------
1348    Name: Matthias Blume
1349    Date: 2001/05/23 14:30:00 EDT
1350    Tag: Release_110_33
1351    Description:
1352    
1353    New version number (110.33).  New bootfiles.
1354    
1355    ----------------------------------------------------------------------
1356    Name: Matthias Blume
1357    Date: 2001/05/22 18:06:00 EDT
1358    Tag: blume-20010522-targets
1359    Description:
1360    
1361    Made install.sh use file config/targets.customized if it exists, falling
1362    back to config/targets if it doesn't.  This way one can have a customized
1363    version of the targets file without touching the "real thing", thus
1364    eliminating the constant fear of accidentally checking something bogus
1365    back into the CVS repository...  (File config/targets.customized must
1366    not be added to the repository!)
1367    
1368    ----------------------------------------------------------------------
1369    Name: Matthias Blume
1370    Date: 2001/05/22 16:30:00 EDT
1371    Tag: blume-20010522-minitut
1372    Description:
1373    
1374    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1375       struct returns.
1376    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1377       incomplete, preliminary documentation for NLFFI.
1378    
1379    ----------------------------------------------------------------------
1380    Name: Matthias Blume
1381    Date: 2001/05/14 11:30:00 EDT
1382    Tag: blume-20010514-script
1383    Description:
1384    
1385    Some bugs in install script fixed.
1386    
1387    In addition to that I also made a slight change to the NLFFI API:
1388    Functors generated by ml-nlffigen now take the dynamic library as a
1389    straight functor argument, not as a suspended one.  (The original
1390    functor code used to force the suspension right away anyway, so there
1391    was nothing gained by this complication of the interface.)
1392    
1393    ----------------------------------------------------------------------
1394    Name: Matthias Blume
1395    Date: 2001/05/11 14:35:00 EDT
1396    Tag: blume-20010511-ml-nlffi
1397    Description:
1398    
1399    I finally took the plunge and added my new FFI code to the main
1400    repository.  For x86-linux it is now ready for prime-time.
1401    
1402    There are two new subdirectories of "src":
1403    
1404      - ml-nlffi-lib:
1405           The utility library for programs using the FFI interface.
1406           Here is the implementation of $/c.cm and its associated low-level
1407           partners $/c-int.cm and $/memory.cm.
1408      - ml-nlffigen:
1409           A stand-alone program for generating ML glue code from C source
1410           code.
1411    
1412    Building ml-nlffigen requires $/ckit-lib.cm.
1413    
1414    The config/install.sh script has been updates to do the Right Thing
1415    (hopefully).
1416    
1417    Notice that the source tree for the C-Kit will not be put under "src"
1418    but directly under the installation root directory.  (This is the
1419    structure that currently exists on the CVS server when you check out
1420    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1421    
1422    Bugs: No documentation yet.
1423    
1424    ----------------------------------------------------------------------
1425    Name: Matthias Blume
1426    Date: 2001/05/09 16:35:00 EDT
1427    Tag: blume-20010509-cpscontract
1428    Description:
1429    
1430    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1431    wrapper/unwrapper elimination did not decrement usage counts and some
1432    dead variables got overlooked by the dead-up logic.)
1433    
1434    ----------------------------------------------------------------------
1435    Name: Lal George
1436    Date: 2001/05/08  17:26:09 EDT
1437    Tag: george-20010508-omit-frameptr
1438    Description:
1439    
1440    Changes to implement the omit-frame-pointer optimization to support
1441    raw C calls. For now, there is only support on the Intel x86, but
1442    other architectures will follow as more experience is gained with this.
1443    
1444    
1445    ----------------------------------------------------------------------
1446    Name: Matthias Blume
1447    Date: 2001/05/07 14:40:00 EDT
1448    Tag: blume-20010507-proxies
1449    Description:
1450    
1451    I made into "proxy libraries" all libraries that qualify for such a
1452    change.  (A qualifying library is a library that has another library or
1453    groups as its sole member and repeats that member's export list
1454    verbatim.  A proxy library avoids this repetition by omitting its export
1455    list, effectively inheriting the list that its (only) member exports.
1456    See the CM manual for more explanation.)
1457    The main effect is that explicit export lists for these libraries
1458    do not have to be kepts in sync, making maintenance a bit easier.
1459    
1460    I also added copyright notices to many .cm-files.
1461    
1462    Last but not least, I made a new set of bootfiles.
1463    
1464    ----------------------------------------------------------------------
1465    Name: Matthias Blume
1466    Date: 2001/05/04 17:00:00 EDT
1467    Tag: blume-20010504-cm-lsplit
1468    Description:
1469    
1470    0. John merged pending changes to $/smlnj-lib.cm
1471    
1472    1. Allen's previous change accidentally backed out of one of Lal's
1473       earlier changes.  I undid this mistake (re-introducing Lal's change).
1474    
1475    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1476       within the compiler where applicable.  There is some code simplification
1477       because of that.
1478    
1479    3. The "split" phase (in FLINT) is now part of the default list of phases.
1480       Compiler.Control.LambdaSplitting.* can be used to globally control the
1481       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1482       it can now also be controlled on a per-source basis: CM has been taught
1483       a new tool parameter applicable to ML source files.
1484    
1485       - To turn lambda-splitting off completely:
1486            local open Compiler.Control.LambdaSplitting in
1487                val _ = set Off
1488            end
1489       - To make "no lambda-splitting" the global default (but allow per-source
1490         overriding); this is the initial setting:
1491            local open Compiler.Control.LambdaSplitting in
1492                val _ = set (Default NONE)
1493            end
1494       - To make "lambda-splitting with aggressiveness a" the global default
1495         (and allow per-source overriding):
1496            local open Compiler.Control.LambdaSplitting in
1497                val _ = set (Default (SOME a))
1498            end
1499    
1500       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1501         write (in the respective .cm-file):
1502            a.sml (lambdasplitting:off)
1503       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1504            a.sml (lambdasplitting:on)
1505       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1506         <a> is a decimal non-negative integer):
1507            a.sml (lambdasplitting:<a>)
1508       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1509            a.sml (lambdasplitting:infinity)
1510       - To use the global default for a.sml:
1511            a.sml (lambdasplitting:default)
1512         or simply
1513            a.sml
1514    
1515    ----------------------------------------------------------------------
1516    Name: Allen Leung
1517    Date: 2001/05/04 01:57:00 EDT
1518    Tag: leunga-20010504-sync
1519    Description:
1520    
1521      MLRISC features.
1522    
1523      1. Fix to CMPXCHG instructions.
1524      2. Changed RA interface to allow annotations in callbacks.
1525      3. Added a new method to the stream interface to allow annotations updates.
1526    
1527    ----------------------------------------------------------------------
1528    Name: Matthias Blume
1529    Date: 2001/05/01 11:45:00 EDT
1530    Tag: blume-20010501-pcedittmp
1531    Description:
1532    
1533    Changed install.sh to use the current working directory instead of
1534    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1535    of /usr/tmp caused trouble with MacOS X because of file premission
1536    problems.
1537    
1538    ----------------------------------------------------------------------
1539    Name: Matthias Blume
1540    Date: 2001/04/20 11:10:00 EDT
1541    Tag: blume-20010420-inMLflag
1542    Description:
1543    
1544     - added vp_limitPtrMask to vproc-state.h
1545       (for use by the raw-C-calls mechanism to implement proper interrupt
1546        handling)
1547     - made the ML compiler aware of various data-structure offsets so it
1548       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1549     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1550       raw C-calls
1551    
1552    ----------------------------------------------------------------------
1553    Name: Lal George
1554    Date: 2001/04/20 09:15:28 EDT
1555    Tag: george-20010420-macosX
1556    Description:
1557    
1558     - Changes to port to Mac OS X; Darwin.
1559    
1560     - In the process I found that sqrt was broken on the PPC, because the
1561       fsqrt instruction is not implemented.
1562    
1563    ----------------------------------------------------------------------
1564    Name: Matthias Blume
1565    Date: 2001/04/18 12:45:00 EDT
1566    Tag: blume-20010418-ccalls
1567    Description:
1568    
1569     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1570       (this bug prevented structure arguments containing pointers from being
1571        passed correctly)
1572     - changed the raw-C-call code in mlriscGen.sml in such a way that
1573       structure arguments are represented as a pointer to the beginning
1574       of the structure (instead of having a series of synthesized arguments,
1575       one for each structure member)
1576    
1577     - made makeml script's verbosity level configurable via environment
1578       variable (MAKEML_VERBOSITY)
1579    
1580     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1581       in rawmem-x86.sml; we are now using the real thing
1582    
1583    ----------------------------------------------------------------------
1584    Name: Matthias Blume
1585    Date: 2001/03/22 16:25:00 EST
1586    Tag: blume-20010322-bootfiles
1587    Description:
1588    
1589    Created a new set of bootfiles (for your automatic installation convenience).
1590    
1591    ----------------------------------------------------------------------
1592    Name: Matthias Blume
1593    Date: 2001/03/22 15:10:00 EST
1594    Tag: blume-20010322-rawmem-parcm
1595    Description:
1596    
1597    1. All "raw memory access" primitives for the new FFI are implemented now
1598       (at least on the x86).
1599    2. Some further cleanup of CM's parallel make mechanism.
1600    
1601    ----------------------------------------------------------------------
1602    Name: Matthias Blume
1603    Date: 2001/03/19 17:53:00 EST
1604    Tag: blume-20010319-parallel
1605    Description:
1606    
1607    Parallel make (using compile servers) now works again.
1608    
1609    To this end, CM.stabilize and CMB.make have been modified to work in
1610    two passes when compile servers are attached:
1611       1. Compile everything, do not perform stabilization; this pass
1612          uses compile servers
1613       2. Stabilize everything; this pass does not use compile servers
1614    If there are no compile servers, the two passes are combined into one
1615    (as before).  Splitting the passes increases the inherent parallelism
1616    in the dependency graph because the entire graph including all
1617    libraries is available at the same time.  This, in turn, improves
1618    server utilization.  The downside is that the master process will
1619    have to do some extra work after compilation is done (because for
1620    technical reasons it must re-read all the binfiles during stabilization).
1621    
1622    ----------------------------------------------------------------------
1623    Name: Matthias Blume
1624    Date: 2001/03/16 12:22:00 EST
1625    Tag: blume-20010316-bootfiles
1626    Description:
1627    
1628    Created a new set of bootfiles (for your automatic installation convenience).
1629    
1630    ----------------------------------------------------------------------
1631    Name: Matthias Blume
1632    Date: 2001/03/16 11:00:00 EST
1633    Tag: blume-20010316-MLTREE-fixup
1634    Description:
1635    
1636    This is a minor fixup for an (untagged) earlier commit by Allen.
1637    (A file was missing).
1638    
1639    ----------------------------------------------------------------------
1640    Name: Allen Leung
1641    Date: Mon Mar  5 18:54:57 EST 2001
1642    Tag: leunga-20010305-cut-support
1643    
1644    1. New support for alternative control-flow in MLTREE.
1645       Currently we support
1646    
1647          FLOW_TO(CALL ...., [k1,...,kn])
1648    
1649       This is needed for 'cuts to' in C-- and try/handle-like constructs
1650       in Moby
1651    
1652       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1653    
1654    2. Register Allocator
1655    
1656       Changes in interface [from Fermin, John]
1657    
1658    3. Alpha 8-bit SLL support [Fermin]
1659    
1660    4. All architectures
1661    
1662       A new module (ClusterExpandCopies) for expanding parallel copies.
1663    
1664    ----------------------------------------------------------------------
1665    Name: Allen Leung
1666    Date: 2001/02/27 23:07:00 EST
1667    Tag: leunga-20010227-minor-stuff
1668    
1669    1. Alpha bug fix for CMOVNE
1670    2. Handle mltree COND(..,FCMP ...,...)
1671    3. Bug fix in simplifier
1672    
1673    ----------------------------------------------------------------------
1674    Name: Matthias Blume
1675    Date: 2001/01/30 17:50:00 EST
1676    Tag: blume-20010130-sync
1677    Description:
1678    
1679    This is just a minor update to sync my devel branch with the main brach.
1680    The only visible change is the addition of some README files.
1681    
1682    ----------------------------------------------------------------------
1683    Name: Matthias Blume
1684    Date: 2001/01/12 23:30:00 JST
1685    Tag: blume-20010112-bootfiles
1686    Description:
1687    
1688    Made a new set of bootfiles that goes with the current state of the
1689    repository.
1690    
1691    ----------------------------------------------------------------------
1692    Name: Matthias Blume
1693    Date: 2001/01/12 21:20:00 JST
1694    Tag: blume-20010112-sync
1695    Description:
1696    
1697    I am just flushing out some minor changes that had accumulated in
1698    my private branch in order to sync with the main tree.  (This is
1699    mainly because I had CVS trouble when trying to merge _into_ my
1700    private branch.)
1701    
1702    Most people should be completely unaffected by this.
1703    
1704    ----------------------------------------------------------------------
1705    Name: Allen Leung
1706    Date: Thu Jan 11 21:03:00 EST 2001
1707    Tag: leunga-20010111-labexp=mltree
1708    Description:
1709    
1710    1.  Removed the type LabelExp and replace it by MLTree.
1711    2.  Rewritten mltree-simplify with the pattern matcher tool.
1712    3.  There were some bugs in alpha code generator which would break
1713        64-bit code generation.
1714    4.  Redo the tools to generate code with the
1715    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1716        are now generated by perl scripts.
1717    
1718    ----------------------------------------------------------------------
1719    Name: Matthias Blume
1720    Date: 2001/01/10 21:55:00 JST
1721    Tag: blume-20010110-rcc
1722    Description:
1723    
1724    The RCC stuff now seems to work (but only on the x86).
1725    This required hacking of the c-calls interface (and -implementation) in
1726    MLRISC.
1727    
1728    Normal compiler users should be unaffected.
1729    
1730    ----------------------------------------------------------------------
1731    Name: Matthias Blume
1732    Date: 2001/01/09 01:20:00 JST
1733    Tag: blume-20010109-rcc
1734    Description:
1735    
1736    This is a fairly big patch, flushing out a large number of pending
1737    changes that I made to my development copy over the last couple of days.
1738    
1739    Of practical relevance at this moment is a workaround for a pickling
1740    bug that Allen ran into the other day.  The cause of the bug itself is
1741    still unknown and it might be hard to fix it properly, but the
1742    workaround has some merits of its own (namely somewhat reducing pickling
1743    overhead for certain libraries).  Therefore, I think this solution should
1744    be satisfactory at this time.
1745    
1746    The rest of the changes (i.e., the vast majority) has to do with my
1747    ongoing efforts of providing direct support for C function calls from
1748    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1749    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1750    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1751    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1752    handle RCC.
1753    
1754    The last part (the changes to mlriscGen.sml) are still known to be
1755    wrong on the x86 and not implemented on all other architectures.  But
1756    the infrastructure is in place. I had to change a few functor
1757    signatures in the backend to be able to route the CCalls interface
1758    from MLRISC there, and I had to specialize the mltree type (on the
1759    x86) to include the necessary extensions. (The extensions themselves
1760    were already there and redy to go in MLRISC/x86).
1761    
1762    Everything should be very happy as soon as someone helps me with
1763    mlriscGen.sml...
1764    
1765    In any case, nothing of this should matter to anyone as long as the
1766    new primop is not being used (which is going to be the case unless you
1767    find it where I hid it :). The rest of the compiler is completely
1768    unaffected.
1769    
1770    ----------------------------------------------------------------------
1771    Name: Matthias Blume
1772    Date: 2001/01/05 00:30:00 JST
1773    Tag: blume-20010105-primops
1774    Description:
1775    
1776    Added some experimental support for work that I am doing right now.
1777    These changes mostly concern added primops, but there is also a new
1778    experimental C library in the runtime system (but currently not enabled
1779    anywhere except on Linux/X86).
1780    
1781    In the course of adding primops (and playing with them), I discovered that
1782    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1783    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1784    To recover, I made type information in INL_PRIM mandatory and changed
1785    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1786    has complete, correct type information (i.e., no bottom types).
1787    
1788    Since all these changes mean that we need new binfiles, I also bumped the
1789    version number to 110.32.1.
1790    
1791    ----------------------------------------------------------------------
1792    Name: Matthias Blume
1793    Date: 2000/12/30 22:10:00 JST
1794    Tag: blume-20001230-various
1795    Description:
1796    
1797    Added proxy libraries for MLRISC and let MLRISC libraries refer
1798    to each other using path anchors.  (See CM manual for explanation.)
1799    
1800    Updated CM documentation.
1801    
1802    Fixed some bugs in CM.
1803    
1804    Implemented "proxy" libraries (= syntactic sugar for CM).
1805    
1806    Added "-quiet" option to makeml and changed runtime system accordingly.
1807    
1808    Added cleanup handler for exportML to reset timers and compiler stats.
1809    
1810    ----------------------------------------------------------------------
1811    Name: Lal George
1812    Date: 2000/12/22 22:22:58 EST 2000
1813    Tag: Release_110_32
1814    Description:
1815    
1816            Infinite precision used throughout MLRISC.
1817            see MLRISC/mltree/machine-int.sig
1818    
1819    ----------------------------------------------------------------------
1820    Name: Matthias Blume
1821    Date: 2000/12/22 23:16:00 JST
1822    Tag: blume-20001222-warn
1823    Description:
1824    
1825    Corrected wording and formatting of some CM warning message which I
1826    broke in my previous patch.
1827    
1828    ----------------------------------------------------------------------
1829    Name: Matthias Blume
1830    Date: 2000/12/22 21:20:00 JST
1831    Tag: blume-20001222-anchorenv
1832    Description:
1833    
1834    Fixed CM's handling of anchor environments in connection with CMB.make.
1835    
1836    ----------------------------------------------------------------------
1837    Name: Matthias Blume
1838    Date: 2000/12/22 13:15:00 JST
1839    Tag: blume-20001222-cleanup
1840    Description:
1841    
1842    Removed src/cm/ffi which does not (and did not) belong here.
1843    
1844    ----------------------------------------------------------------------
1845    Name: Matthias Blume
1846    Date: 2000/12/21 23:55:00 JST
1847    Tag: blume-20001221-exn
1848    Description:
1849    
1850    Probably most important: CM no longer silently swallows all exceptions
1851    in the compiler.
1852    Plus: some other minor CM changes.  For example, CM now reports some
1853    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1854    
1855    ----------------------------------------------------------------------
1856    Name: Matthias Blume
1857    Date: 2000/12/15 00:01:05 JST
1858    Tag: blume-20001215-dirtool
1859    Description:
1860    
1861    - "dir" tool added.
1862    - improvements and cleanup to Tools structure
1863    - documentation updates
1864    
1865    ----------------------------------------------------------------------
1866    Name: Allen Leung
1867    Date: Thu Dec 14 03:45:24 EST 2000
1868    Description:
1869    Tag:  leunga-20001214-int-inf
1870    Description:
1871    
1872       In IntInf, added these standard functions, which are missing from our
1873    implementation:
1874    
1875        andb : int * int -> int
1876        xorb : int * int -> int
1877        orb  : int * int -> int
1878        notb : int -> int
1879         <<   : int * word -> int
1880        ~>>  : int * word -> int
1881    
1882       Not tested, I hope they are correct.
1883    
1884    ----------------------------------------------------------------------
1885    Name: Allen Leung
1886    Date: Fri Dec  8 19:23:26 EST 2000
1887    Description:
1888    Tag:  leunga-20001208-nowhere
1889    Description:
1890    
1891      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1892    to generate better error messages etc.  Plus a brief manual.
1893    
1894    ----------------------------------------------------------------------
1895    Name: Lal George
1896    Date: 2000/12/08 09:54:02 EST 2000
1897    Tag: Release_110_31
1898    Description:
1899    
1900    - Version 110.31
1901    ----------------------------------------------------------------------
1902    Name: Allen Leung
1903    Date: Thu Dec  7 22:01:04 EST 2000
1904    Tag:  leunga-20001207-cell-monster-hack
1905    Description:
1906    
1907    Major MLRISC internal changes.  Affect all clients.
1908    Summary:
1909    
1910    1.  Type CELLS.cell = int is now replaced by a datatype.
1911        As a result, the old regmap is now gone.  Almost all interfaces
1912        in MLRISC change as a consequence.
1913    
1914    2.  A new brand version of machine description tool (v3.0) that generates
1915        modules expecting the new interface.  The old version is removed.
1916    
1917    3.  The RA interface has been further abstracted into two new functors.
1918        RISC_RA and X86RA.  These functors have much simpler interfaces.
1919        [See also directory MLRISC/demo.]
1920    
1921    4.  Some other new source->source code generation tools are available:
1922    
1923        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1924        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1925           I use this tool to generate the peephole optimizers---with the new
1926           cell type changes, peephole rules are becoming difficult to write
1927           without conditional pattern matching.
1928    
1929    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1930        cover the entire MLRISC source tree so many things broke.
1931    
1932    6.  CM files have been moved to the subdirectory MLRISC/cm.
1933        They are moved because there are a lot of them and they clutter up the
1934        root dir.
1935    
1936    7.  More detailed documentation to come...
1937    
1938        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1939        a makeml -rebuild first.  This is because of other other
1940        changes that Matthias has made (see below).
1941    
1942    
1943    ----------------------------------------------------------------------
1944    Name: Matthias Blume
1945    Date: 2000/11/30 23:12:00 JST
1946    Tag: blume-20001130-filereorg
1947    Description:
1948    
1949    Some manual updates and some file reorganizations in CM.
1950    
1951    ----------------------------------------------------------------------
1952    Name: Matthias Blume
1953    Date: 2000/11/24 17:45:00 JST
1954    Tag: blume-20001124-link
1955    Description:
1956    
1957    Drastically improved link traversal code for the case that the dynamic
1958    value was already loaded at bootstrap time.  As a result, CM and CMB
1959    now both load blazingly fast -- even on a very slow machine.  Also,
1960    memory consumption has been further reduced by this.
1961    
1962    Warning: The format of the PIDMAP file has changed.  THerefore, to
1963    bootstrap you have to do this:
1964    
1965    1. Run CMB.make
1966    2. Make a symbolic link for the boot directory:
1967         ln -s sml.boot.ARCH-OS xxx
1968    3. "Rebuild" the boot directory:
1969         ./makeml -boot xxx -rebuild sml ; rm xxx
1970    4. Boot normally:
1971          ./makeml
1972    
1973    ----------------------------------------------------------------------
1974    Name: Matthias Blume
1975    Date: 2000/11/21 21:20:00 JST
1976    Tag: blume-20001121-tools
1977    Description:
1978    
1979    Continued hacking on autoloading problem -- with success this time.
1980    Also changed tool-plugin mechanism.  See new CM manual.
1981    
1982    ----------------------------------------------------------------------
1983    Name: Matthias Blume
1984    Date: 2000/11/19 14:30:00 JST
1985    Tag:  blume-20001119-autoload
1986    Description:
1987    
1988    Some hacking to make autoloading faster.  Success for CMB, no success
1989    so far for CM.  There is a reduced structure CM' that autoloads faster.
1990    (This is a temporary, non-documented hack to be eliminated again when
1991    the general problem is solved.)
1992    
1993    ----------------------------------------------------------------------
1994    Name: Matthias Blume
1995    Date: 2000/11/17 14:10:00 JST
1996    Tag: blume-20001117-pickle-lib
1997    Description:
1998    
1999    1. Eliminated comp-lib.cm
2000    2. Made pickle-lib.cm
2001    3. Eliminated all uses of intset.sml (from comp-lib.cm)
2002    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
2003       equivalent constructs from smlnj-lib.cm (INtHashTable).
2004    5. Point 4. also goes for those uses of intmap.* in MLRISC.
2005       Duplicated intmap modules thrown out.
2006    6. Hunted down all duplicated SCC code and replaced it with
2007       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
2008    7. Rewrote Feedback module.
2009    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
2010       should be thrown out and equivalent modules from smlnj-lib.cm
2011       should be used (IntRedBlackSet, IntListSet, ...).
2012    
2013    Confirmed that compiler compiles to fixpoint.
2014    
2015    ----------------------------------------------------------------------
2016    Name: Allen Leung
2017    Date: 2000/11/10 18:00:00
2018    Tag: leunga-20001110-new-x86-fp
2019    
2020    A new x86 floating point code generator has been added.
2021    By default this is turned off.  To turn this on, do:
2022    
2023        CM.autoload "$smlnj/compiler.cm";
2024        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
2025    
2026    Changes:
2027    
2028    1.  Changed FTAN to FPTAN so that the assembly output is correct.
2029    2.  Changed the extension callback for FTANGENT to generate:
2030    
2031              fptan
2032              fstp  %st(0)
2033        instead of
2034              fptan
2035              fstpl ftempmem
2036    
2037    3.  Numerous assembly fixes for x86.
2038    
2039    5.  Cleaned up the machine code output module x86/x86MC.sml and added
2040        support for a whole bunch of instructions and addressing modes:
2041    
2042          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
2043          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
2044          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
2045          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
2046          fxch %st(n)
2047          fld %st(n)
2048          fst %st(n)
2049          fst mem
2050          fstp %st(n)
2051          fucom %st(n)
2052          fucomp %st(n)
2053    
2054        All these are now generated when the fast fp mode is turned on.
2055    
2056    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2057    
2058    ----------------------------------------------------------------------
2059    Name: Matthias Blume
2060    Date: 2000/11/09 11:20:00 JST
2061    Tag: blume-20001109-scc
2062    Description:
2063    
2064    Eliminated some code duplication:
2065    
2066    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2067       (Otherwise the functor is useless.)
2068    2. Used GraphSCCFn where SCCUtilFun was used previously.
2069    3. Got rid of SCCUtilFun (in comp-lib.cm).
2070    
2071    ----------------------------------------------------------------------
2072    Name: Lal George
2073    Date: 2000/11/06 09:02:21 EST 2000
2074    Tag: Release_110_30
2075    Description:
2076    
2077    - Version 110.30
2078    ----------------------------------------------------------------------
2079    Name: Matthias Blume
2080    Date: 2000/11/04 14:45:00
2081    Tag: blume-20001104-mlbuild
2082    Description:
2083    
2084    - Made ml-build faster on startup.
2085    - Documentation fixes.
2086    
2087    ----------------------------------------------------------------------
2088    Name: Matthias Blume
2089    Date: 2000/11/02 17:00:00 JST
2090    Tag: blume-20001102-condcomp
2091    Description:
2092    
2093    - Small tweaks to pickler -- new BOOTFILES!
2094    - Version bumped to 110.29.2.
2095    - Added conditional compilation facility to init.cmi (see comment there).
2096    ----------------------------------------------------------------------
2097    Name: Allen Leung
2098    Date: 2000/10/23 19:31:00
2099    Tag: leunga-20001023-demo-ra
2100    
2101    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2102    2. Test programs for the graph library updated
2103    3. Some new MLRISC demo programs added
2104    
2105    ----------------------------------------------------------------------
2106    Name: Matthias Blume
2107    Date: 2000/08/31 22:15:00 JST
2108    Tag: blume-20001017-errmsg
2109    Description:
2110    
2111    More error message grief: Where there used to be no messages, there
2112    now were some that had bogus error regions.  Fixed.
2113    
2114    ----------------------------------------------------------------------
2115    Name: Matthias Blume
2116    Date: 2000/08/31 17:30:00 JST
2117    Tag: blume-20001017-v110p29p1
2118    Description:
2119    
2120    I made a version 110.29.1 with new bootfiles.
2121    
2122    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2123              CM documentation changes and a small bugfix in CM's error reporting.
2124    
2125    ----------------------------------------------------------------------
2126    Name: Lal George
2127    Date: 2000/09/27 14:42:35 EDT
2128    Tag: george-20000927-nodestatus
2129    Description:
2130    
2131    Changed the type of the nodestatus, so that:
2132    
2133            SPILLED(~1)             is now SPILLED
2134            SPILLED(m) where m>=0   is now MEMREG(m)
2135            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2136    
2137    ----------------------------------------------------------------------
2138    Name: Matthias Blume
2139    Date: 2000/09/07 14:45:00 JST
2140    Tag: blume-20000907-cmerrmsg
2141    Description:
2142    
2143    Small tweak to CM to avoid getting ML syntax error messages twice.
2144    
2145    ----------------------------------------------------------------------
2146    Name: Matthias Blume
2147    Date: 2000/08/31 18:00:00 JST
2148    Tag: blume-20000831-cvsbootfiles
2149    Description:
2150    
2151    New URL for boot files (because the 110.29 files on the BL server do
2152    now work correctly with my updated install scripts for yacc and lex).
2153    
2154    ----------------------------------------------------------------------
2155    Name: Matthias Blume
2156    Date: 2000/08/08 12:33:00 JST
2157    Tag: blume-20000808-manual
2158    Description:
2159    
2160    Tiny update to CM manual.
2161    
2162    ----------------------------------------------------------------------
2163    Name: Allen Leung
2164    Date: 2000/08/7 19:31:00
2165    Tag: leunga-20000807-a-whole-bunch-of-stuff
2166    
2167      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2168    and Mobdy.
2169    
2170    1.  x86
2171    
2172       a.  Fixes to peephole module by John and Dan.
2173       b.  Assembly fix to SETcc by Allen.
2174       c.  Fix to c-call by John.
2175       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2176       e.  Instruction selection optimization to SETcc as suggested by John.
2177    
2178           For example,
2179    
2180            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2181    
2182           should generate:
2183    
2184            MOVL a, x
2185            SUBL b, x
2186            SHRL 31, x
2187    
2188    2.  IR stuff
2189    
2190         A bunch of new DJ-graph related algorithms added.  These
2191         speed up SSA construction.
2192    
2193    3.  SSA + Scheduling
2194    
2195         Added code for SSA and scheduling to the repository
2196    
2197    ----------------------------------------------------------------------
2198    Name: Lal George
2199    Date: 2000/07/27 11:53:14 EDT
2200    
2201    Tag: lal-20000727-linux-ppc
2202    Description:
2203    
2204     Made changes to support Linux PPC.
2205     p.s. I have confirmation that the 110.29 boot files work fine.
2206    
2207    ----------------------------------------------------------------------
2208    Name: Matthias Blume
2209    Date: 2000/07/27 17:40:00 JST
2210    Tag: blume-20000727-scripts
2211    Description:
2212    
2213    !!!! WARNING !!!!
2214    You must recompile the runtime system!
2215    !!!! WARNING !!!!
2216    
2217    This is basically another round of script-enhancements:
2218    
2219    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2220       and undefine CM preprocessor symbols.
2221    
2222    2. ml-build avoids generating a new heap image if it finds that the
2223       existing one is still ok.  (The condition is that no ML file had to
2224       be recompiled and all ML files are found to be older that the heap
2225       file.)
2226    
2227       To make this work smoothly, I also hacked the runtime system as
2228       well as SMLofNJ.SysInfo to get access to the heap image suffix
2229       (.sparc-solaris, ...) that is currently being used.
2230    
2231       Moreover, the signature of CM.mk_standalone has changed.  See the
2232       CM manual.
2233    
2234    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2235       CM manual for details.)
2236    
2237    4. More CM manual updates:
2238        - all of the above has been documented.
2239        - there is now a section describing the (CM-related) command line
2240          arguments that are accepted by the "sml" command
2241    
2242    ----------------------------------------------------------------------
2243    Name: Matthias Blume
2244    Date: 2000/07/25 16:20:00 JST
2245    Tag: blume-20000725-makedepend
2246    Description:
2247    
2248    Added a script called ml-makedepend.  This can be used in makefiles
2249    for Unix' make in a way very similar to the "makedepend" command for
2250    C.
2251    
2252    The script internally uses function CM.sources.
2253    
2254    Synopsis:
2255    
2256        ml-makedepend [-f makefile] cmfile targetname
2257    
2258    The default for the makefile is "makefile" (or "Makefile" should
2259    "makefile" not exist).
2260    
2261    ml-makedepend adds a cmfile/targetname-specific section to this
2262    makefile (after removing the previous version of this section).  The
2263    section contains a single dependency specification with targetname on
2264    the LHS (targetname is an arbitrary name), and a list of files derived
2265    from the cmfile on the RHS.  Some of the files on the RHS are
2266    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2267    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2268    path names.  The makefile writer is responsible for making sure that
2269    these variables have correct at the time "make" is invoked.
2270    
2271    ----------------------------------------------------------------------
2272    Name: Matthias Blume
2273    Date: 2000/07/22 23:30:00 JST
2274    Tag: blume-20000722-urlupdate
2275    Description:
2276    
2277    Changed BOOT and config/srcarchiveurl to point to BL server:
2278    
2279        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2280    
2281    ----------------------------------------------------------------------
2282    Name: Matthias Blume
2283    Date: 2000/07/18 18:00:00 JST
2284    Tag: blume-20000718-Version_110_29
2285    Description:
2286    
2287    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2288    
2289    2. Updated config/version to 110.29
2290    
2291    3. Updated config/srcarchiveurl
2292    
2293    3. New boot files!
2294       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2295    
2296    ----------------------------------------------------------------------
2297    Name: Matthias Blume
2298    Date: 2000/07/11 13:58:00 JST
2299    Tag: blume-20000711-doctypo
2300    Description:
2301    
2302    Fixed a few typos in CM manual.
2303    
2304    ----------------------------------------------------------------------
2305    Name: Allen Leung
2306    Date: 2000/06/15 00:38:00
2307    Tag: leunga-20000704-sparc-x86
2308    
2309    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2310    2. fix to x86 RET bug [found by Dan Grossman]
2311    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2312    
2313       Affects c-- and moby only
2314    
2315    ----------------------------------------------------------------------
2316    Name: Matthias Blume
2317    Date: 2000/07/04 15:26:00
2318    Tag: blume-20000704-trigger
2319    Description:
2320    
2321    1. Improvements to CM manual.
2322    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2323       of getting a back-trace.  The function, when called, raises an
2324       internal exception which explicitly carries the full back-trace history,
2325       so it is unaffected by any intervening handle-raise pairs ("trivial"
2326       or not).  The interactive loop will print that history once it arrives
2327       at top level.
2328       Short of having all exceptions implicitly carry the full history, the
2329       recommended way of using this facility is:
2330         - compile your program with instrumentation "on"
2331         - run it, when it raises an exception, look at the history
2332         - if the history is "cut off" because of some handler, go and modify
2333           your program so that it explicitly calls BTrace.trigger
2334         - recompile (still instrumented), and rerun; look at the full history
2335    
2336    ----------------------------------------------------------------------
2337    Name: Matthias Blume
2338    Date: 2000/07/03 15:36:00 JST
2339    Tag: blume-20000702-manual
2340    Description:
2341    
2342    Small corrections and updates to CM manual.
2343    
2344    ----------------------------------------------------------------------
2345    Name: Matthias Blume
2346    Date: 2000/06/29 16:04:00 JST
2347    Tag: blume-20000629-yacctool
2348    Description:
2349    
2350    Changes:
2351    
2352    1. Class "mlyacc" now takes separate arguments to pass options to
2353       generated .sml- and .sig-files independently.
2354    2. Corresponding CM manual updates.
2355    3. BTrace module now also reports call sites.  (However, for loop clusters
2356       it only shows from where the cluster was entered.)  There are associated
2357       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2358    
2359    ----------------------------------------------------------------------
2360    Name: Matthias Blume
2361    Date: 2000/06/27 16:51:00 JST
2362    Tag: blume-20000627-noweb
2363    Description:
2364    
2365    Changes:
2366    
2367     1. Implemented "subdir" and "witness" options for noweb tool.
2368        This caused some slight internal changes in CM's tool implementation.
2369     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2370        some remaining issues from earlier path anchor changes.
2371     3. Updated CM manual accordingly.
2372    
2373     4. Changed implementation of back-tracing so that I now consider it
2374        ready for prime-time.
2375    
2376        In particular, you don't have to explicitly trigger the back-trace
2377        anymore.  Instead, if you are running BTrace-instrumented code and
2378        there is an uncaught exception (regardless of whether or not it was
2379        raised in instrumented code), the top-level evalloop will print
2380        the back-trace.
2381    
2382        Features:
2383    
2384          - Instrumented and uninstrumented code work together seemlessly.
2385            (Of course, uninstrumented code is never mentioned in actual
2386             back-traces.)
2387    
2388          - Asymptotic time- and space-complexity of instrumented code is
2389            equal to that of uninstrumented code.  (This means that
2390            tail-recursion is preserved by the instrumentation phase.)
2391    
2392          - Modules whose code has been instrumented in different sessions
2393            work together without problem.
2394    
2395          - There is no penalty whatsoever on uninstrumented code.
2396    
2397          - There is no penalty on "raise" expressions, even in
2398            instrumented code.
2399    
2400        A potential bug (or perhaps it is a feature, too):
2401    
2402          A back-trace reaches no further than the outermost instrumented
2403          non-trivial "raise".  Here, a "trivial" raise is one that is the
2404          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2405    
2406               <exp> handle e => raise e
2407    
2408          and even
2409    
2410               <exp> handle Foo => raise Bar
2411    
2412          and, of course, through
2413    
2414               <exp> handle Foo => ...
2415    
2416         if the exception was not Foo.
2417    
2418         Back-traces always reach right through any un-instrumented code
2419         including any of its "handle" expressions, trivial or not.
2420    
2421       To try this out, do the following:
2422    
2423         - Erase all existing binfiles for your program.
2424           (You may keep binfiles for those modules where you think you
2425            definitely don't need back-tracing.)
2426         - Turn on back-trace instrumentation:
2427              SMLofNJ.Internals.BTrace.mode (SOME true);
2428         - Recompile your program.  (I.e., run "CM.make" or "use".)
2429         - You may now turn instrumentation off again (if you want):
2430              SMLofNJ.Internals.BTrace.mode (SOME false);
2431         - Run your program as usual.  If it raises an exception that
2432           reaches the interactive toplevel, then a back-trace will
2433           automatically be printed.  After that, the toplevel loop
2434           will print the exception history as usual.
2435    
2436    ----------------------------------------------------------------------
2437    Name: Matthias Blume
2438    Date: 2000/06/26 09:56:46 JST
2439    Tag: blume-20000626-setup
2440    Description:
2441    
2442    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2443          ML code before and after compiling a file (e.g., to set compiler
2444          flags)
2445    
2446    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2447              - associated changes to btrace.sml (BTrace instrumentation pass)
2448              - cleaner implementation of btimp.sml (BTrace tracing and report
2449                module)
2450    
2451    CM manual: * new path encoding documented
2452               * description of setup-parameter to "sml" added
2453    
2454    The biggest user-visible change to back-tracing is that it is no
2455    longer necessary to compile all traced modules within the same
2456    session.  (This was a real limitation.)
2457    
2458    ----------------------------------------------------------------------
2459    Name: Matthias Blume
2460    Date: 2000/06/24 12:40:00 JST
2461    Tag: blume-20000624-startup
2462    Description:
2463    
2464    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2465    bit too often -- to put it mildly. :)
2466    
2467    ----------------------------------------------------------------------
2468    Name: Matthias Blume
2469    Date: 2000/06/23 18:20:00 JST
2470    Tag: blume-20000623-btrace
2471    Description:
2472    
2473    This updates adds a backtrace facility to aid programmers in debugging
2474    their programs.  This involves the following changes:
2475    
2476    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2477       keeping track of the current call stack.  When programs are compiled
2478       in a special mode, the compiler will insert calls to these hooks
2479       into the user program.
2480       "Hook" means that it is possible for different implementations of
2481       back-tracing to register themselves (at different times).
2482    
2483    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2484       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2485       It can be turned on using this call:
2486         SMLofNJ.Internals.BTrace.mode (SOME true);
2487       Turning it off again:
2488         SMLofNJ.Internals.BTrace.mode (SOME false);
2489       Querying the current status:
2490         SMLofNJ.Internals.BTrace.mode NONE;
2491       Annotated programs are about twice as big as normal ones, and they
2492       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2493       where all hooks do nothing).  The slowdown with a plugin that is
2494       actually useful (such as the one supplied by default) is even greater,
2495       but in the case of the default plugin it is still only an constant
2496       factor (amortized).
2497    
2498    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2499       with a sub-structure BTrace for controlling back-tracing.  In particular,
2500       the above-mentioned function "mode" controls whether the annotation
2501       phase is invoked by the compiler.  Another important function is
2502       "trigger": when called it aborts the current execution and causes
2503       the top-level loop to print a full back-trace.
2504    
2505    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2506       for back-tracing.  It keeps track of the dynamic call stack and in
2507       addition to that it keeps a partial history at each "level" of that
2508       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2509       d and b (at separate times, dynamically), then the report will show:
2510    
2511       GOTO   d
2512             /c
2513       GOTO  \b
2514       CALL   a
2515    
2516       This shows that there was an initial non-tail call of a, then a
2517       tail-call to b or c, looping behavior in a cluster of functions that
2518       consist of b and c, and then a goto from that cluster (i.e., either from
2519       b or from c) to d.
2520    
2521       Note that (depending on the user program) the amount of information
2522       that the back-trace module has to keep track of at each level is bounded
2523       by a constant.  Thus, the whole implementation has the same asymptotical
2524       complexity as the original program (both in space and in time).
2525    
2526    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2527       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2528       which is raised by the "trigger" function mentioned above.
2529    
2530    Notes on usage:
2531    
2532    - Annotated code works well together with unannotated code:
2533    Unannotated calls simply do not show up at all in the backtrace.
2534    
2535    - It is not a good idea to let modules that were annotated during
2536    different sessions run at the same time.  This is because the compiler
2537    chooses small integers to identify individual functions, and there
2538    will be clashes if different modules were compiled in separate sessions.
2539    (Nothing will crash, and you will even be told about the clashes, but
2540    back-trace information will in general not be useful.)
2541    
2542    - Back-tracing can be confused by callcc and capture.
2543    
2544    - The only way of getting a back-trace right now is to explicitly
2545    invoke the "trigger" function from your user program.  Eventually, we
2546    should make every exception carry back-trace information (if
2547    available).  But since this creates more overhead at "raise"-time
2548    (similar to the current exnHistory overhead), I have not yet
2549    implemented this.  (The implementation will be rather easy.)  With
2550    exceptions carrying back-trace information, this facility will be even
2551    more useful because users don't need to modify their programs...
2552    
2553    - While it is possible to compile the compiler with back-trace
2554    annotations turned on (I did it to get some confidence in
2555    correctness), you must make absolutely sure that core.sml and
2556    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2557    be compiled with annotation because there is no core access yet, but
2558    if you compile btimp.sml with annotation, then the system will go into
2559    an infinite recursion and crash.)
2560    Since CM currently does not know about BTrace, the only way to turn
2561    annotations on and off for different modules of the compiler is to
2562    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2563    this is awkward and clumsy.
2564    
2565    Sample sessions:
2566    
2567    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2568    - SMLofNJ.Internals.BTrace.mode (SOME true);
2569    [autoloading]
2570    [autoloading done]
2571    val it = false : bool
2572    - structure X = struct
2573    -     fun main n = let
2574    -         fun a (x, 0) = d x
2575    -           | a (x, n) = b (x, n - 1)
2576    -         and b (x, n) = c (x, n)
2577    -         and c (x, n) = a (x, n)
2578    -         and d x = e (x, 3)
2579    -         and e (x, 0) = f x
2580    -           | e (x, n) = e (x, n - 1)
2581    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2582    -           | f n = n * g (n - 1)
2583    -         and g n = a (n, 3)
2584    -     in
2585    -         f n
2586    -     end
2587    - end;
2588    structure X : sig val main : int -> int end
2589    - X.main 3;
2590    *** BACK-TRACE ***
2591    GOTO   stdIn:4.2-13.20: X.main[2].f
2592    GOTO-( stdIn:4.2-13.20: X.main[2].e
2593    GOTO   stdIn:4.2-13.20: X.main[2].d
2594         / stdIn:4.2-13.20: X.main[2].a
2595         | stdIn:4.2-13.20: X.main[2].b
2596    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2597    CALL   stdIn:4.2-13.20: X.main[2].g
2598    GOTO   stdIn:4.2-13.20: X.main[2].f
2599    GOTO-( stdIn:4.2-13.20: X.main[2].e
2600    GOTO   stdIn:4.2-13.20: X.main[2].d
2601         / stdIn:4.2-13.20: X.main[2].a
2602         | stdIn:4.2-13.20: X.main[2].b
2603    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2604    CALL   stdIn:4.2-13.20: X.main[2].g
2605    GOTO   stdIn:4.2-13.20: X.main[2].f
2606    GOTO-( stdIn:4.2-13.20: X.main[2].e
2607    GOTO   stdIn:4.2-13.20: X.main[2].d
2608         / stdIn:4.2-13.20: X.main[2].a
2609         | stdIn:4.2-13.20: X.main[2].b
2610    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2611    CALL   stdIn:4.2-13.20: X.main[2].g
2612    GOTO   stdIn:4.2-13.20: X.main[2].f
2613    CALL   stdIn:2.15-17.4: X.main[2]
2614    -
2615    
2616    (Note that because of a FLINt bug the above code currently does not
2617    compile without BTrace turned on.)
2618    
2619    Here is another example, using my modified Tiger compiler:
2620    
2621    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2622    - SMLofNJ.Internals.BTrace.mode (SOME true);
2623    [autoloading]
2624    [autoloading done]
2625    val it = false : bool
2626    - CM.make "sources.cm";
2627    [autoloading]
2628    ...
2629    [autoloading done]
2630    [scanning sources.cm]
2631    [parsing (sources.cm):parse.sml]
2632    [creating directory CM/SKEL ...]
2633    [parsing (sources.cm):tiger.lex.sml]
2634    ...
2635    [wrote CM/sparc-unix/semant.sml]
2636    [compiling (sources.cm):main.sml]
2637    [wrote CM/sparc-unix/main.sml]
2638    [New bindings added.]
2639    val it = true : bool
2640    - Main.compile ("../testcases/merge.tig", "foo.out");
2641    *** BACK-TRACE ***
2642    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2643    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2644    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2645    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2646    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2647    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2648    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2649         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2650    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2651    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2652    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2653    CALL   main.sml:1.18-118.4: Main.compile[2]
2654    -
2655    
2656    ----------------------------------------------------------------------
2657    Name: Matthias Blumen
2658    Date: 2000/06/21 18:00:00 JST
2659    Tag: blume-20000621-manual
2660    Description:
2661    
2662    CM manual update: Path environments documented.
2663    
2664    ----------------------------------------------------------------------
2665    Name: Matthias Blume
2666    Date: 2000/06/19 13:40:00
2667    Tag: blume-20000619-manual
2668    Description:
2669    
2670    CM manual and system/README update.  This only covers the fact that
2671    there are no more implicit anchors.  (Path environments and the "bind"
2672    option to "cm" have yet to be documented.)
2673    
2674    ----------------------------------------------------------------------
2675    Name: Matthias Blume
2676    Date: 2000/06/19 11:05:00 JST
2677    Tag: blume-20000619-chdir-bugfix
2678    Description:
2679    
2680    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2681    
2682    ----------------------------------------------------------------------
2683    Name: Matthias Blume
2684    Date: 2000/06/18 22:00:10 JST
2685    Tag: blume-20000618-implicit-anchors-really-gone
2686    Description:
2687    
2688    I updates the previous HISTORY entry where I forgot to mention that
2689    implicit anchors are no longer with us.
2690    
2691    The current update also gets rid of the (now useless) controller
2692    CM.Control.implicit_anchors.
2693    
2694    ----------------------------------------------------------------------
2695    Name: Matthias Blume
2696    Date: 2000/06/16 17:30:00 JST
2697    Tag: blume-20000616-anchorenv
2698    Description:
2699    
2700    This patch implements the long anticipated (just kidding :) "anchor
2701    environment" mechanism.  In the course of doing this, I also
2702    re-implemented CM's internal "SrcPath" module from scratch.  The new
2703    one should be more robust in certain boundary cases.  In any case, it
2704    is a lot cleaner than its predecessor (IMHO).
2705    
2706    This time, although there is yet another boot file format change, I
2707    kept the unpickler backward-compatible.  As a result, no new bootfiles
2708    are necessary and bootstrapping is straightforward.  (You cannot read
2709    new bootfiles into an old system, but the other way around is no
2710    problem.)
2711    
2712    Visible changes:
2713    
2714    ** 0. Implicit path anchors (without the leading $-symbol) are no
2715    longer recognized at all. This means that such path names are not
2716    illegal either.  For example, the name basis.cm simply refers to a
2717    local file called "basis.cm" (i.e, the name is an ordinary path
2718    relative to .cm-files directory).  Or, to put it differently, only
2719    names that start with $ are anchored paths.
2720    
2721    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2722    vanished.
2723    
2724    John (Reppy) had critizised this as soon as I originally proposed and
2725    implemented it, but at that time I did not really deeply believe
2726    him. :) Now I came full-circle because I need the $<singlearc> syntax
2727    in another place where it cannot be seen as an abbreviation for
2728    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2729    seems to mean (i.e., it "expands" into the corresponding anchor
2730    value).
2731    
2732    However, when paths are used as members in CM description files, it
2733    continues to be true that there must be at least another arc after the
2734    anchor.  This is now enforced separately during semantic analysis
2735    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2736    
2737    ** 2. The "cm" class now accepts an option "bind".  The option's value
2738    is a sub-option list of precisely two items -- one labeled "anchor"
2739    and the other one labeled "value".  As you might expect, "anchor" is
2740    used to specify an anchor name to be bound, and "value" specifies what
2741    the anchor is being bound to.
2742    
2743    The value must be a directory name and can be given in either standard
2744    syntax (including the possibility that it is itself an anchored path)
2745    or native syntax.
2746    
2747    Examples:
2748    
2749       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2750       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2751    
2752    and so on.
2753    
2754    The meaning of this is that the .cm-file will be processed with an
2755    augmented anchor environment where the given anchor(s) is/are bound to
2756    the given values(s).
2757    
2758    The rationale for having this feature is this: Suppose you are trying
2759    to use two different (already stable) libraries a.cm and b.cm (that
2760    you perhaps didn't write yourself).  Further, suppose each of these
2761    two libraries internally uses its own auxiliary library $aux/lib.cm.
2762    Normally you would now have a problem because the anchor "lib" can not
2763    be bound to more than one value globally.  Therefore, the project that
2764    uses both a.cm and b.cm must locally redirect the anchor to some other
2765    place:
2766    
2767       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2768       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2769    
2770    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2771    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2772    
2773    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2774    you when you do so at the time of CM.stabilize).  Therefore, you can
2775    also use an anchored path as the value:
2776    
2777      a.cm (bind:(anchor:lib value:$a-lib))
2778      b.cm (bind:(anchor:lib value:$b-lib))
2779    
2780    Now you can globally configure (using the usual CM.Anchor.anchor or
2781    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2782    itself is always locally bound, setting it globally is no longer
2783    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2784    can still be used as a global anchor for separate purposes.  As a
2785    matter of fact, one can locally define "lib" in terms of a global
2786    "lib":
2787    
2788      a.cm (bind:(anchor:lib value:$lib/a))
2789      b.cm (bind:(anchor:lib value:$lib/b))
2790    
2791    ** 3: The encoding of path names has changed.  This affects the way
2792    path names are shown in CM's progress report and also the internal
2793    protocol encoding used for parallel make.
2794    
2795    The encoding now uses one or more ':'-separated segments.  Each
2796    segments corresponds to a file that has been specified relative to the
2797    file given by its preceding segment.  The first segment is either
2798    relative to the CWD, absolute, or anchored.  Each segment itself is
2799    basically a Unix pathname; all segments but the first are relative.
2800    
2801    Example:
2802    
2803       $foo/bar/baz.cm:a/b/c.sml
2804    
2805    This path denotes the file bar/a/b/c.sml relative to the directory
2806    denoted by anchor "foo".  Notice that the encoding also includes
2807    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2808    paths are resolved relative to the .cm-files directory, so baz.cm must
2809    be ignored to get the "real" pathname.
2810    
2811    To make this fact more obvious, CM puts the names of such "virtual
2812    arcs" into parentheses when they appear in progress reports. (No
2813    parentheses will appear in the internal protocol encoding.)  Thus,
2814    what you really see is:
2815    
2816      $foo/bar/(baz.cm):a/b/c.sml
2817    
2818    I find this notation to be much more informative than before.
2819    
2820    Another new feature of the encoding is that special characters
2821    including parentheses, colons, (back)slashes, and white space are
2822    written as \ddd (where ddd is the decimal encoding of the character).
2823    
2824    *** The CM manual still needs to be updated.
2825    
2826    ----------------------------------------------------------------------
2827    Name: Allen Leung
2828    Date: 2000/06/15 00:38:00
2829    Tag: leunga-20000615-x86-peephole
2830    
2831    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2832    
2833    ----------------------------------------------------------------------
2834    Name: Matthias Blume
2835    Date: 2000/06/12 11:40:00
2836    Tag: blume-20000612-parmakefix
2837    Description:
2838    
2839    More cleanup after changing the file naming scheme: This time I
2840    repaired the parallel make mechanism for CMB.make which I broke earlier.
2841    
2842    ----------------------------------------------------------------------
2843    Name: Allen Leung
2844    Date: 2000/06/09 01:25:00
2845    Tag: leunga-20000609-various
2846    
2847    None of these things should affect normal SML/NJ operations
2848    
2849    1. Peephole improvements provided by Fermin (c--)
2850    2. New annotation DEFUSE for adding extra dependence (moby)
2851    3. New X86 LOCK instructions (moby)
2852    4. New machine description language for reservation tables (scheduling)
2853    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2854       trees etc.)
2855    6. I've changed the CM files so that they can work with versions
2856       110.0.6, 110.25 and 110.28
2857    
2858    ----------------------------------------------------------------------
2859    Name: Matthias Blume
2860    Date: 2000/06/09 12:40:00
2861    Tag: blume-20000609-log
2862    Description:
2863    
2864    - Removed all(?) remaining RCS Log entries from sources.
2865    
2866    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2867      anchored paths).
2868    
2869    ----------------------------------------------------------------------
2870    Name: Matthias Blume
2871    Date: 2000/06/07 17:00:00 JST
2872    Tag: blume-20000607-no-implicit-anchors
2873    Description:
2874    
2875    1. This update changes the default setting for
2876    CM.Control.implicit_anchors from true to false.  This means that
2877    implicit anchors are no longer permitted by default.  I also tried to
2878    make sure that nothing else still relies on implicit anchors.
2879    (This is the next step on the schedule towards a CM that does not even
2880    have the notion of implicit anchors anymore.)
2881    
2882    2. More CM manual updates.
2883    
2884    3. I managed to track down and fix the pickling bug I mentioned last
2885    time.  Because of the previously existing workaround, this entails no
2886    immediate practical changes.
2887    
2888    ----------------------------------------------------------------------
2889    Name: Matthias Blume
2890    Date: 2000/06/06 11:15:00 JST
2891    Tag: blume-20000606-lazierpickle
2892    Description:
2893    
2894    !!!! NEW BOOT FILES !!!!
2895    
2896    * The main purpose of this update is to make library pickles lazier in
2897    order to reduce the initial space penalty for autoloading a library.
2898    As a result, it is now possible to have $smlnj/compiler.cm
2899    pre-registered.  This should take care of the many complaints or
2900    inquiries about missing structure Compiler.  This required changes to
2901    CM's internal data structures and small tweaks to some algorithms.
2902    
2903    As a neat additional effect, it is no longer necessary (for the sake
2904    of lean heap image files) to distinguish between a "minimal" CM and a
2905    "full" CM.  Now, there is only one CM (i.e., the "full" version:
2906    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2907    interactive top level. ($smlnj/cm/minimal.cm is gone.)
2908    
2909    To make the life of compiler-hackers easier, "makeml" now also
2910    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
2911    words, after you bootstrap a new sml for the first time, you will not
2912    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
2913    around you will still have to do it, though.)
2914    
2915    * A second change consists of major updates to the CM manual.  There
2916    are now several appendices with summary information and also a full
2917    specification of the CM description file syntax.
2918    
2919    * In directory src/system I added the script "allcross".  This script
2920    invokes sml and cross-compiles the compiler for all supported
2921    architectures.  (Useful when providing a new set of boot files.)
2922    
2923    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
2924    added a small tweak to pickle-util.sml to work around this problem,
2925    but it is not a proper fix yet.  I will investigate further.  (The
2926    effect of the bug was an inflation of library pickle size.)
2927    
2928    * Version number increased to 110.28.1 (to avoid compatibility problems).
2929    
2930    ----------------------------------------------------------------------
2931    Name: Allen Leung
2932    Date: 2000/05/25 17:28 EDT
2933    Tag: leunga-20000525-ra
2934    Description:
2935    
2936      Fixed a bug in freezing phase of the register allocator.
2937    
2938    ----------------------------------------------------------------------
2939    Name: Allen Leung
2940    Date: 2000/05/15 22:53 EDT
2941    Tag: leunga-20000515-alpha-x86-ra
2942    Description:
2943    
2944      1. Alpha
2945    
2946          Slight cleanup.  Removed the instruction SGNXL
2947    
2948      2. X86
2949    
2950          Added the following instructions to the instruction set:
2951    
2952            ROLx, RORx,
2953            BTx, BTSx, BTLx, BTRx,
2954            XCHGx, and variants with the LOCK prefix
2955    
2956      3. Register Allocation
2957    
2958          The module ra-rewrite-with-renaming has been improved.
2959    
2960      These have no effect on SML/NJ.
2961    
2962    ----------------------------------------------------------------------
2963    Name: Matthias Blume
2964    Date: 2000/05/15 16:20:00 JST
2965    Tag: blume-20000515-lightrebuild
2966    Description:
2967    
2968    1. I added an alternative to "-rebuild" to "makeml".  The difference is
2969       that prior to calling CMB.make' the CM-variable "LIGHT" will be
2970       defined.  In effect, the command will not build any cross-compiler
2971       backends and therefore finish more quickly.
2972    
2973       The "fixpt" script also takes a "-light" switch to be able to use
2974       this new facility while compiling for a fixpoint.
2975    
2976    2. I replaced all mentions of anchored paths in group owner specifications
2977       with simple relative paths (usually starting with "..").
2978       The rationale is that a library's internal workings should not be
2979       compromised by the lack of some anchor.  (An anchor is necessary
2980       for someone who wants to refer to the library by an anchored path,
2981       but it should not be necessary to build the same library in the first
2982       place.)
2983    
2984    3. I changed the way CM's tool mechanism determines the shell command
2985       string used for things like ml-yacc etc. so that it does not break
2986       when CM.Control.implicit_anchors is turned off.
2987    
2988    ----------------------------------------------------------------------
2989    Name: Matthias Blume
2990    Date: 2000/05/12 18:20:00 JST
2991    Tag: blume-20000512-ml-build
2992    Description:
2993    
2994    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
2995    getting installed properly (by config/install.sh).
2996    
2997    ----------------------------------------------------------------------
2998    Name: Matthias Blume
2999    Date: 2000/05/12 17:30:00 JST
3000    Tag: blume-20000512-anchors
3001    Description:
3002    
3003    !!! NEW BOOT FILES !!!
3004    
3005    This change is in preparation of fading out support for "implicitly
3006    anchored path names".  I went through all sources and used the
3007    explicit (and relatively new) $-notation.  See system/README and the
3008    CM manual for more info on this.
3009    
3010    I also modified the anchoring scheme for some things such as "smlnj",
3011    "MLRISC", "cm", etc. to take advantage of the fact that explicit
3012    anchors are more expressive: anchor name and first arc do not have to
3013    coincide.  This entails the following user-visible change:
3014    
3015    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
3016    particular, when you fire up sml with a command-line argument, say,
3017    e.g.:
3018    
3019       sml '$smlnj/cmb.cm'
3020    
3021    At the ML toplevel prompt:
3022    
3023       CM.autoload "$smlnj/cmb.cm";
3024    
3025    There is also a new controller in CM.Control that can be used to turn
3026    off all remaining support for implicit anchors by saying:
3027    
3028        CM.autoload "$smlnj/
3029        #set CM.Control.implicit_anchors false;
3030    
3031    This causes CM to reject implicitly anchored paths.  This is (for the
3032    time being) less permissive than the "final" version where there will
3033    be no more such implicit anchors and relative paths will be just that:
3034    relative.
3035    
3036    The next step (version after next version?) will be to make the
3037    default for CM.Control.implicit_anchors false.  After the dust has
3038    settled, I can then produce the "final" version of this...
3039    
3040    Note: Since bootstrapping is a bit tricky, I provided new boot files.
3041    
3042    ----------------------------------------------------------------------
3043    Name: Matthias Blume
3044    Date: 2000/05/11 16:30:00 JST
3045    Tag: blume-20000511-sources
3046    Description:
3047    
3048    The main change is that I added function CM.sources as a generalized
3049    version of the earlier CM.makedepend.  This entails the following
3050    additional changes:
3051    
3052      - CM.makedepend has been dropped.
3053    
3054      - CM manual has been updated.
3055    
3056      - TOOLS signature and API have been changed.
3057    
3058    ----------------------------------------------------------------------
3059    Name: Allen Leung
3060    Date: 2000/05/10 21:17 EDT
3061    Tag: leunga-20000510-moby-c--ssa
3062    Description:
3063    
3064      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3065    None of these affect SML/NJ.
3066    
3067    1. Register Allocation
3068    
3069        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3070           This module tries to remove local (i.e. basic block level) redundancies
3071           during spilling.
3072    
3073        b. A new framework for performing region based register allocation.
3074           Not yet entirely functional.
3075    
3076    2. X86
3077    
3078       a. DefUse for POP was missing the stack pointer [found by Lal]
3079       b. Reload for CALL was incorrect in X86Spill [found by John]
3080       c. Various fixes in X86Spill so that it can be used correctly for
3081          the new spilling module.
3082    
3083    3. SSA/IR
3084    
3085       a. New module ir/dj-dataflow.sml implements elimination based
3086          data flow analysis.
3087    
3088    4. MLRiscGen
3089    
3090       a. Fix for gc type annotation
3091    
3092    5. MDGen
3093    
3094       Various fixes for machine description -> ml code translation.  For ssa
3095       only.
3096    
3097    ----------------------------------------------------------------------
3098    Name: Allen Leung
3099    Date: 2000/05/08 22:17 EDT
3100    Tag: leunga-20000508-labexp
3101    Description:
3102    
3103      Fermin has found a few assembly problems with constant expressions
3104      generated in LabelExp.  Mostly, the problems involve extra parentheses,
3105      which choke on dumb assemblers.  This is his fix.
3106    
3107    ----------------------------------------------------------------------
3108    Name: Dave MacQueen
3109    Date: 2000/04/09 14:00 EDT
3110    Tag: dbm-20000502-Version_110_28
3111    Description:
3112    
3113    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
3114    
3115    2. Updated config/version to 110.28
3116    
3117    3. Updated config/srcarchiveurl
3118    
3119    3. New boot files!
3120       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
3121    
3122    ----------------------------------------------------------------------
3123    Name: Matthias Blume
3124    Date: 2000/05/01 19:05:00 JST
3125    Tag: blume-20000501-noweb
3126    Description:
3127    
3128    A new noweb tool has been added.  The existing system is entirely
3129    unaffected by this, but some CM users have asked for renewed noweb
3130    support.  Everything is documented in the CM manual.
3131    
3132    New (plugin) libraries:
3133    
3134       noweb-tool.cm
3135       nw-ext.cm
3136    
3137    ----------------------------------------------------------------------
3138    Name: Dave MacQueen
3139    Date: 2000/04/30 12:40PM EDT
3140    Tag: dbm-20000430-bug_fixes
3141    Description:
3142    
3143    1. Fix for bug 1498
3144       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
3145       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
3146         added toRealArray function
3147       smlnj/src/compiler/MiscUtil/print/ppobj.sml
3148         added check for tag Obj.RealArray to array printing case in ppObj
3149    
3150    2. Fix for bug 1510
3151       smlnj/src/compiler/Semant/types/typesutil.sml
3152         fixed definition of dummyargs (used by equalTycon) so that
3153         dummy args are distinct types
3154    
3155    ----------------------------------------------------------------------
3156    Name: Matthias Blume
3157    Date: 2000/04/30 01:00:00 JST
3158    Tag: blume-20000430-versions
3159    Description:
3160    
3161    1. CM version numbering added.  This is an implementation of Lal's
3162       proposal for adding version numbers and version checking to .cm
3163       files.  Lal said that his proposal was just that -- a proposal.
3164       For the time being I went ahead and implemented it so that people
3165       can comment on it.  Everything is completely backward-compatible
3166       (except for the stable library format, i.e., new bootfiles!).
3167    
3168       As usual, see the CM manual for details.
3169    
3170    2. An alternative syntax for anchored paths has been implemented.
3171       Dave has recently voiced the same concerns that I had when I did
3172       this, so there should be some support.  My take is that eventually
3173       I will let support for the current syntax (where anchors are
3174       "implicit") fade out in favor of the new, explicit syntax.
3175       In order to be backward-compatible, both old and new syntax are
3176       currently supported.
3177    
3178       Again, see the CM manual for details.
3179    
3180    3. Parallel make is trying to be slightly smarter:  When the master
3181       process finds a "bottleneck", i.e., when there is only one
3182       compilation unit that can be compiled and everybody else is
3183       waiting on it, then it will simply compile it directly instead
3184       of clumsily telling one of the slaves to do it.
3185    
3186    4. Support for "unsharing" added.  This is necessary in order to be
3187       able to have two different versions of the same library running
3188       at the same time (e.g., for trying out a new MLRISC while still
3189       having the old MLRISC linked into the current compiler, etc.)
3190       See the CM manual.
3191    
3192    5. Simple "makedepend" functionality added for generating Makefile
3193       dependency information.  (This is rather crude at the moment.
3194       Expect some changes here in the future.)
3195    
3196    6. ".fun" added as a recognized suffix for ML files. Also documented
3197       explicitly in the manual that the fallback behavior (unknown suffix
3198       -> ML file) is not an official feature!
3199    
3200    7. Small changes to the pickler for stable libraries.
3201    
3202    8. Several internal changes to CM (for cleanup/improvement).
3203    
3204    
3205    !!!! NEW BINFILES !!!!
3206    
3207    ----------------------------------------------------------------------
3208    Name: Matthias Blume
3209    Date: 2000/04/28 17:30:00 JST
3210    Tag: blume-20000428-pathconfig
3211    Description:
3212    
3213    1. I changed config/install.sh to remove duplicate entries from the
3214       lib/pathconfig file at the end.  Moreover, the final version of
3215       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
3216       in src/system/installml.
3217    
3218    2. The config/install.sh script now consistently uses relative
3219       pathnames in lib/pathconfig whenever the anchor is in the lib
3220       directory.  (So far this was true for the libraries that come
3221       pre-compiled and bundled as part of the bootfiles but not for
3222       libraries that are compiled by the script itself.)
3223    
3224    ----------------------------------------------------------------------
3225    Name: Matthias Blume
3226    Date: 2000/04/26 13:10:00 JST
3227    Tag: blume-20000426-fun_suffix
3228    Description:
3229    
3230    Added ".fun" as a recognized file name suffix (for ML code).
3231    
3232    ----------------------------------------------------------------------
3233    Name: Allen Leung
3234    Date: 2000/04/25 17:00:00 EST
3235    Tag: leunga-20000425-alpha-ra
3236    Description:
3237    
3238    1. Alpha
3239    
3240        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
3241    in C--.
3242    
3243    2. RA
3244    
3245       Added a flag "ra-dump-size" to print out the size of the flowgraph
3246       and the interference graph.
3247    
3248    ----------------------------------------------------------------------
3249    Name: Dave MacQueen
3250    Date: 2000/04/25/
3251    Tag: dbm-20000425-mlyacc_doc_examples
3252    Description:
3253      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
3254      Updated all three examples in src/ml-yacc/examples to run
3255      under 110.* using CM.make.
3256    
3257    ----------------------------------------------------------------------
3258    Name: Allen Leung
3259    Date: 2000/04/20 23:04:00 EST
3260    Tag: leunga-20000420-ssa-c---stuff
3261    Description:
3262    
3263      This update synchronizes my repository with Yale's.  Most of these
3264    changes, however, do not affect SML/NJ at all (the RA is an exception).
3265    
3266    1. Register Allocator
3267    
3268       a. An improvement in the interference graph construction:
3269          Given a copy
3270    
3271                s <- t
3272    
3273          no interference edge between s and t is added for this definition of s.
3274    
3275       b. I've added two new spill heuristic modules that Fermin and I developed
3276          (in the new library RA.cm). These are unused in SML/NJ but maybe
3277          useful for others (Moby?)
3278    
3279    2. X86
3280    
3281       a. Various fixes in the backend provided by Fermin [C--] and Lal.
3282    
3283    3. Alpha
3284    
3285       a. Added the BSR instruction and code generation that goes with it [C--]
3286       b. Other fixes too numerous to recount provided by Fermin [C--]
3287    
3288    4. Regmaps
3289    
3290       a. The regmaps are not initialized with the identity physical bindings
3291          at creation time.  This is unneeded.
3292    
3293    5. MLRISC Optimizations
3294    
3295       a. The DJ-Graph module can now compute the iterated dominance frontiers
3296          intersects with liveness incrementally in linear time! Woohoo!
3297          This is now used in my new SSA construction algorithm.
3298    
3299       b. THe branch reorganization module is now smarter about linear chains of
3300          basic blocks.
3301    
3302    
3303    ----------------------------------------------------------------------
3304    Name: Matthias Blume
3305    Date: 2000/04/12 13:52:00 JST
3306    Tag: blume_main_v110p27_1
3307    Description:
3308    
3309    Changed install.sh script to handle archive files without version number
3310    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
3311    name of the boot file archive.
3312    
3313    ----------------------------------------------------------------------
3314    Name: Dave MacQueen
3315    Date: 2000/04/09 14:00 EDT
3316    Tag: dbm-20000410-Version_110_27
3317    Description:
3318    
3319    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
3320    
3321    2. Updated src/config/version to 110.27
3322    
3323    3. New boot files!
3324    
3325    ----------------------------------------------------------------------
3326    Name: Allen Leung
3327    Date: 2000/04/09 19:09:00 EST
3328    Tag: leunga-20000409-misc
3329    Description:
3330    
3331    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
3332    
3333    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
3334    
3335    ----------------------------------------------------------------------
3336    Name: Stefan
3337    Date: 2000/04/07 10:00:00 EDT
3338    Tag: monnier-20000406-branch-handling
3339    Description:
3340    
3341    Improved handling of branches (mostly those generated from
3342    polymorphic equality), removed switchoff and changed the
3343    default optimization settings (more cpsopt and less flintopt).
3344    
3345    ----------------------------------------------------------------------
3346    Name: Allen Leung
3347    Date: 2000/04/06 01:30:00 EST
3348    Tag: leunga-20000406-peephole-x86-SSA-2
3349    Description:
3350    
3351       Forgot a few files.
3352    
3353    ----------------------------------------------------------------------
3354    Name: Allen Leung
3355    Date: 2000/04/06 00:36:00 EST
3356    Tag: leunga-20000406-peephole-x86-SSA
3357    Description:
3358    
3359    1.  New Peephole code
3360    
3361    2.  Minor improvement to X86 instruction selection
3362    
3363    3.  Various fixes to SSA and machine description -> code translator
3364    
3365    ----------------------------------------------------------------------
3366    Name: Matthias Blume
3367    Date: 2000/04/05 12:30:00 JST
3368    Tag: blume_main_v110p26p2_3
3369    Description:
3370    
3371    This update just merges three minor cosmetic updates to CM's sources
3372    to get ready for the 110.27 code freeze on Friday.  No functionality
3373    has changed.
3374    
3375    ----------------------------------------------------------------------
3376    Name: Allen Leung
3377    Date: 2000/04/04 19:39:00 EST
3378    Tag: leunga-20000404-x86-asm
3379    Description:
3380    
3381    1.  Fixed a problem in X86 assembly.
3382    
3383        Things like
3384    
3385           jmp %eax
3386           jmp (%eax)
3387    
3388        should be output as
3389    
3390           jmp *%eax
3391           jmp *(%eax)
3392    
3393    2.  Assembly output
3394    
3395          Added a new flag
3396    
3397              "asm-indent-copies" (default to false)
3398    
3399          When this flag is on, parallel copies will be indented an extra level.
3400    
3401    ----------------------------------------------------------------------
3402    Name: Allen Leung
3403    Date: 2000/04/04 03:18:00 EST
3404    Tag: leunga-20000404-C--Moby
3405    Description:
3406    
3407        All of these fixes are related to C--, Moby, and my own optimization
3408        stuff; so they shouldn't affect SML/NJ.
3409    
3410    1.  X86
3411    
3412        Various fixes related floating point, and extensions.
3413    
3414    2.  Alpha
3415    
3416        Some extra patterns related to loads with signed/zero extension
3417        provided by Fermin.
3418    
3419    3.  Assembly
3420    
3421        When generating assembly, resolve the value of client defined constants,
3422        instead of generating symbolic values.  This is controlled by the
3423        new flag "asm-resolve-constants", which is default to true.
3424    
3425    4.  Machine Descriptions
3426    
3427        a. The precedence parser was slightly broken when parsing infixr symbols.
3428        b. The type generalizing code had the bound variables reversed, resulting
3429           in a problem during arity raising.
3430        c. Various fixes in machine descriptions.
3431    
3432    ----------------------------------------------------------------------
3433    Name: Matthias Blume
3434    Date: 2000/04/03 16:05:00 JST
3435    Tag: blume_main_v110p26p2_2
3436    Description:
3437    
3438    I eliminated coreEnv from compInfo.  Access to the "Core" structure is
3439    now done via the ordinary static environment that is context to each
3440    compilation unit.
3441    
3442    To this end, I arranged that instead of "structure Core" as "structure
3443    _Core" is bound in the pervasive environment.  Core access is done via
3444    _Core (which can never be accidentally rebound because _Core is not a
3445    legal surface-syntax symbol).
3446    
3447    The current solution is much cleaner because the core environment is
3448    now simply part of the pervasive environment which is part of every
3449    compilation unit's context anyway.  In particular, this eliminates all
3450    special-case handling that was necessary until now in order to deal
3451    with dynamic and symbolic parts of the core environment.
3452    
3453    Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3454    compilation manager's bootstrap compiler (actually: in the "init group"
3455    handling).  See the comments in src/system/smlnj/init/init.cmi for
3456    more details.
3457    
3458    I also tried to track down all mentions of "Core" (as string argument
3459    to Symbol.strSymbol) in the compiler and replaced them with a
3460    reference to the new CoreSym.coreSym.  Seems cleaner since the actual
3461    name appears in one place only.
3462    
3463    Binfile and bootfile format have not changed, but the switchover from
3464    the old "init.cmi" to the new one is a bit tricky, so I supplied new
3465    bootfiles anyway.
3466    
3467    ----------------------------------------------------------------------
3468    Name: Allen Leung
3469    Date: 2000/04/02 21:17:00 EST
3470    Tag: leunga-20000402-mltree
3471    Description:
3472    
3473       1. Renamed the constructor CALL in MLTREE by popular demand.
3474       2. Added a bunch of files from my repository.  These are currently
3475          used by other non-SMLNJ backends.
3476    
3477    ----------------------------------------------------------------------
3478    Name: Allen Leung
3479    Date: 2000/03/31 21:15:00 EST
3480    Tag: leunga-20000331-aliasing
3481    Description:
3482    
3483    This update contains a rewritten (and hopefully more correct) module
3484    for extracting aliasing information from CPS.
3485    
3486       To turn on this feature:
3487    
3488            Compiler.Control.CG.memDisambiguate := true
3489    
3490       To pretty print the region information with assembly
3491    
3492           Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
3493    
3494       To control how many levels of aliasing information are printed, use:
3495    
3496           Compiler.Control.MLRISC.getInt "points-to-show-level" := n
3497    
3498       The default of n is 3.
3499    
3500    ----------------------------------------------------------------------
3501    Name: David MacQueen
3502    Date: 2000/03/31 11:15:00 EST
3503    Tag: dbm-20000331-runtime_fix
3504    Description:
3505    
3506    This update contains:
3507    
3508    1. runtime/c-lib/c-libraries.c
3509       includes added in revision 1.2 caused compilation errors on hppa-hpux
3510    
3511    2. fix for bug 1556
3512       system/Basis/Implementation/NJ/internal-signals.sml
3513    
3514    ----------------------------------------------------------------------
3515    Name: Matthias Blume
3516  Date: 2000/03/31 18:00:00 JST  Date: 2000/03/31 18:00:00 JST
3517  Tag: blume_main_v110p26p2_1  Tag: blume_main_v110p26p2_1
3518  Description:  Description:
# Line 67  Line 3566 
3566     (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
3567     used).     used).
3568    
3569     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3570     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3571     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3572    
3573     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 80  Line 3579 
3579    
3580     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3581    
3582     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3583     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3584    
3585  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 111  Line 3610 
3610       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3611       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3612       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
3613       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3614       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3615       Dave's hands. :)       Dave's hands. :)
3616    
# Line 214  Line 3713 
3713    
3714       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3715       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3716       testl is perferable to andl.       testl is preferable to andl.
3717    
3718  7. RA (x86 only)  7. RA (x86 only)
3719    
# Line 396  Line 3895 
3895    
3896  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3897  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3898  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
3899  explanation.  explanation.
3900    
3901  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3902  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3903  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3904  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 443  Line 3942 
3942  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
3943  <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,
3944  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
3945  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3946  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3947  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3948    
# Line 493  Line 3992 
3992    it from that remote directory.    it from that remote directory.
3993    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3994    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3995    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3996    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3997    
3998    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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