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Diff of /sml/trunk/HISTORY

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revision 643, Fri May 12 08:29:15 2000 UTC revision 1038, Mon Jan 28 00:18:03 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Allen Leung
17    Date: 2002/01/27
18    Tag: leunga-20020127-nowhere
19    Description:
20    
21       Added a target called nowhere in the configuration scripts.
22       Enabling this will build the MLRISC 'nowhere' tool (for translating
23       programs with where-clauses into legal SML code) during installation.
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume
27    Date: 2002/01/25 21:27:00 EST
28    Tag: Release_110_38
29    Description:
30    
31    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
32    
33    README will be added later.
34    
35    ----------------------------------------------------------------------
36    Name: Matthias Blume
37    Date: 2002/01/25
38    Tag: blume-20020125-ffi
39    Description:
40    
41    A large number of tweaks and improvements to ml-nlffi-lib and
42    ml-nlffigen:
43    
44       - ML represenation types have been streamlined
45       - getter and setter functions work with concrete values, not abstract
46         ones where possible
47       - ml-nlffigen command line more flexible (see README file there)
48       - some bugs have been fixed (hopefully)
49    
50    ----------------------------------------------------------------------
51    Name: Lal George
52    Date: 2002/01/24
53    Tag: george-20020124-risc-ra-interface
54    Description:
55    
56       There is a dramatic simplification in the interface to the
57       register allocator for RISC architectures as a result of making
58       parallel copy instructions explicit.
59    
60    ----------------------------------------------------------------------
61    Name: Matthias Blume
62    Date: 2002/01/22
63    Tag: blume-20020122-x86-ccalls
64    Description:
65    
66    Bug fix for c-calls on x86 (having to do with how char- and
67    short-arguments are being handled).
68    
69    ----------------------------------------------------------------------
70    Name: Matthias Blume
71    Date: 2002/01/21
72    Tag: blume-20020121-ff
73    Description:
74    
75    Another day of fiddling with the FFI...
76    
77    1. Bug fix/workaround:  CKIT does not complain about negative array
78       dimensions, so ml-nlffigen has to guard itself against this possibility.
79       (Otherwise a negative dimension would send it into an infinite loop.)
80    
81    2. Some of the abstract types (light objects, light pointers, most "base"
82       types) in structure C are now eqtypes.
83    
84    3. Added constructors and test functions for NULL function pointers.
85    
86    ----------------------------------------------------------------------
87    Name: Matthias Blume
88    Date: 2002/01/18
89    Tag: blume-20020118-ready-for-new-release
90    Description:
91    
92    Made config/srcarchiveurl point to a new place.  (Will provide boot
93    files shortly.)
94    
95    Maybe we christen this to be 110.38?
96    
97    ----------------------------------------------------------------------
98    Name: Matthias Blume
99    Date: 2002/01/18
100    Tag: blume-20020118-more-ffifiddle
101    Description:
102    
103    Today's FFI fiddling:
104    
105      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
106        C.Set.* that use concrete (MLRep.*) arguments and results instead
107        of abstract ones.
108    
109      - Provided word-style bit operations etc. for "int" representation
110        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
111        and Long.
112    
113    ----------------------------------------------------------------------
114    Name: Matthias Blume
115    Date: 2002/01/18
116    Tag: blume-20020118-use-x86-fp
117    Description:
118    
119    Now that x86-fast-fp seems to be working, I turned it back on again
120    by default.  (Seems to work fine now, even with the FFI.)
121    
122    Other than that, I added some documentation about the FFI to
123    src/ml-nlffigen/README and updated the FFI test examples in
124    src/ml-nlffi-lib/Tests/*.
125    
126    ----------------------------------------------------------------------
127    Name: Allen Leung
128    Date: 2002/01/17
129    Tag: leunga-20020117-x86-fast-fp-call
130    Description:
131    
132       1. Fixed a problem with handling return fp values when x86's fast fp
133          mode is turned on.
134    
135       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
136          of %f32.
137    
138       3. Added a constructor INT32lit to the ast of MLRISC tools.
139    
140    ----------------------------------------------------------------------
141    Name: Matthias Blume
142    Date: 2002/01/16
143    Tag: blume-20020116-ffifiddle
144    Description:
145    
146    More fiddling with the FFI interface:
147    
148     - Make constness 'c instead of rw wherever possible.  This eliminates
149       the need for certain explicit coercions.  (However, due to ML's
150       value polymorphism, there will still be many cases where explicit
151       coercions are necessary.  Phantom types are not the whole answer
152       to modeling a subtyping relationship in ML.)
153    
154     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
155    
156     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
157       clumsy workaround for varargs problem.)
158    
159    ----------------------------------------------------------------------
160    Name: Lal George
161    Date: 2002/01/15
162    Tag: <none>
163    Description:
164    
165    1. Since COPY instructions are no longer native to the architecture,
166       a generic functor can be used to implement the expandCopies function.
167    
168    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
169       TEXT segment.
170    
171    ----------------------------------------------------------------------
172    Name: Matthias Blume
173    Date: 2002/01/15
174    Tag: blume-20020115-ffiupdates
175    Description:
176    
177    1. Fix for bug resulting in single-precision float values being returned
178       incorrectly from FFI calls.
179    
180    2. Small modifications to C FFI API:
181    
182        - memory-allocation routines return straight objects (no options)
183          and raise an exception in out-of-memory situations
184        - unsafe extensions to cast between function pointers and pointers
185          from/to ints
186        - added structure C_Debug as an alternative to structure C where
187          pointer-dereferencing (|*| and |*!) always check for null-pointers
188        - added open_lib' to DynLinkage;  open_lib' works like open_lib
189          but also takes a (possibly empty) list of existing library handles
190          that the current library depends on
191    
192    ----------------------------------------------------------------------
193    Name: Matthias Blume
194    Date: 2002/01/10
195    Tag: blume-20020110-newffigen
196    Description:
197    
198    1. Updates to portable graph code.
199    
200    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
201       more scalable now so that even huge interfaces such as the one
202       for GTK compile in finite time and space. :-)
203       See src/ml-nlffigen/README for details on what's new.
204    
205    ----------------------------------------------------------------------
206    Name: Lal George
207    Date: 2001/01/09 14:31:35 EST 2002
208    Tag: george-20011206-rm-native-copy
209    Description:
210    
211            Removed the native COPY and FCOPY instructions
212            from all the architectures and replaced it with the
213            explicit COPY instruction from the previous commit.
214    
215            It is now possible to simplify many of the optimizations
216            modules that manipulate copies. This has not been
217            done in this change.
218    
219    ----------------------------------------------------------------------
220    Name: Lal George
221    Date: 2001/12/06 16:50:13 EST 2001
222    Tag: george-20011206-mlrisc-instruction
223    Description:
224    
225    Changed the representation of instructions from being fully abstract
226    to being partially concrete. That is to say:
227    
228      from
229            type instruction
230    
231      to
232            type instr                              (* machine instruction *)
233    
234            datatype instruction =
235                LIVE of {regs: C.cellset, spilled: C.cellset}
236              | KILL of {regs: C.cellset, spilled: C.cellset}
237              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
238              | ANNOTATION of {i: instruction, a: Annotations.annotation}
239              | INSTR of instr
240    
241    This makes the handling of certain special instructions that appear on
242    all architectures easier and uniform.
243    
244    LIVE and KILL say that a list of registers are live or killed at the
245    program point where they appear. No spill code is generated when an
246    element of the 'regs' field is spilled, but the register is moved to
247    the 'spilled' (which is present, more for debugging than anything else).
248    
249    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
250    We used to generate:
251    
252            DEFFREG f1
253            f1 := f2 + f3
254            trapb
255    
256    but now generate:
257    
258            f1 := f2 + f3
259            trapb
260            LIVE {regs=[f1,f2,f3], spilled=[]}
261    
262    Furthermore, the DEFFREG (hack) required that all floating point instruction
263    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
264    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
265    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
266    this architecture).
267    
268    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
269    all the architectures. This will result in further simplification of the
270    register allocator that must be aware of them for coalescing purposes, and
271    will also simplify certain aspects of the machine description that provides
272    callbacks related to parallel copies.
273    
274    ANNOTATION should be obvious, and now INSTR represents the honest to God
275    machine instruction set!
276    
277    The <arch>/instructions/<arch>Instr.sml files define certain utility
278    functions for making porting easier -- essentially converting upper case
279    to lower case. All machine instructions (of type instr) are in upper case,
280    and the lower case form generates an MLRISC instruction. For example on
281    the alpha we have:
282    
283      datatype instr =
284         LDA of {r:cell, b:cell, d:operand}
285       | ...
286    
287      val lda : {r:cell, b:cell, d:operand} -> instruction
288        ...
289    
290    where lda is just (INSTR o LDA), etc.
291    
292    ----------------------------------------------------------------------
293    Name: Matthias Blume
294    Date: 2001/11/22 21:40:00 EST
295    Tag: Release_110_37
296    Description:
297    
298    Release 110.37.  This time for real.
299    
300    ----------------------------------------------------------------------
301    Name: Matthias Blume
302    Date: 2001/11/21 16:35:00 EST
303    Tag: blume-20011121-foot-in-mouth
304    Description:
305    
306    Removed the "Release_110_37" tag because of a serious bug.
307    This will be re-tagged once the bug is fixed.
308    
309    ----------------------------------------------------------------------
310    Name: Matthias Blume
311    Date: 2001/11/21 16:14:00 EST
312    Tag: blume-20011121-forgottenfile
313    Description:
314    
315    Forgot to add a file.  (Just a .tex-file -- part of
316    the CM manual source.)
317    
318    ----------------------------------------------------------------------
319    Name: Matthias Blume
320    Date: 2001/11/21 16:10:00 EST
321    Tag: blume-20011121-invalid_110_37
322    Description:
323    
324    Note: I removed the original tag "Release_110_37" from this commit
325          because we found a serious bug in all non-x86 backends.
326          - Matthias
327    
328    1. Modifications to the SML/NJ code generator and to the runtime system
329       so that code object name strings are directly inserted into code
330       objects at code generation time.  The only business the runtime system
331       has with this is now to read the name strings on occasions.
332       (The encoding of the name string has also changed somewhat.)
333    
334    2. CM now implements a simple "set calculus" for specifying export lists.
335       In particular, it is now possible to refer to the export lists of
336       other libraries/groups/sources and form unions as well as differences.
337       See the latest CM manual for details.
338    
339    3. An separate notion of "proxy" libraries has again be eliminated from
340       CM's model.  (Proxy libraries are now simply a special case of using
341       the export list calculus.)
342    
343    4. Some of the existing libraries now take advantage of the new set
344       calculus.
345       (Notice that not all libraries have been converted because some
346       of the existing .cm-files are supposed to be backward compatible
347       with 110.0.x.)
348    
349    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
350       "General.exnMessage"!  The former relies on a certain hook to be
351       initialized, and that often does not happen in the stand-alone case.)
352    
353    ----------------------------------------------------------------------
354    Name: Lal George
355    Date: 2001/11/21  13:56:18 EST
356    Tag: george-2001121-pseudo-ops
357    Description:
358    
359      Implemented a complete redesign of MLRISC pseudo-ops. Now there
360      ought to never be any question of incompatabilities with
361      pseudo-op syntax expected by host assemblers.
362    
363      For now, only modules supporting GAS syntax are implemented
364      but more should follow, such as MASM, and vendor assembler
365      syntax, e.g. IBM as, Sun as, etc.
366    
367    ----------------------------------------------------------------------
368    Name: Matthias Blume
369    Date: 2001/11/14 11:52:00 EST
370    Tag: blume-20011114-srcname
371    Description:
372    
373    1. Routed the name of the current source file to mlriscgen where it
374       should be directly emitted into the code object.  (This last part
375       is yet to be done.)
376    
377    2. Some cleanup of the pgraph code to make it match the proposal that
378       I put out the other day.  (The proposal notwithstanding, things are
379       still in flux here.)
380    
381    ----------------------------------------------------------------------
382    Name: Lal George
383    Date: 2001/11/14 09:44:04 EST
384    Tag:
385    Description:
386    
387      Fix for a backpatching bug reported by Allen.
388    
389      Because the boundary between short and long span-dependent
390      instructions is +/- 128, there are an astounding number of
391      span-dependent instructions whose size is over estimated.
392    
393      Allen came up with the idea of letting the size of span
394      dependent instructions be non-monotonic, for a maxIter
395      number of times, after which the size must be monotonically
396      increasing.
397    
398      This table shows the number of span-dependent instructions
399      whose size was over-estimated as a function of maxIter, for the
400      file Parse/parse/ml.grm.sml:
401    
402         maxIter            # of instructions:
403            10                      687
404            20                      438
405            30                      198
406            40                        0
407    
408      In compiling the compiler, there is no significant difference in
409      compilation speed between maxIter=10 and maxIter=40. Actually,
410      my measurements showed that maxIter=40 was a tad faster than
411      maxIter=10! Also 96% of the  files in the compiler reach a fix
412      point within 13 iterations, so fixing maxIter at 40, while high,
413      is okay.
414    
415    ----------------------------------------------------------------------
416    Name: Matthias Blume
417    Date: 2001/10/31 15:25:00 EST
418    Tag: blume-20011031-pgraph
419    Description:
420    
421    CKIT:
422    * Changed the "Function" constructor of type Ast.ctype to carry optional
423      argument identifiers.
424    * Changed the return type of TypeUtil.getFunction accordingly.
425    * Type equality ignores the argument names.
426    * TypeUtil.composite tries to preserve argument names but gives up quickly
427      if there is a mismatch.
428    
429    installation script:
430    * attempts to use "curl" if available (unless "wget" is available as well)
431    
432    CM:
433    * has an experimental implementation of "portable graphs" which I will
434      soon propose as an implementation-independent library format
435    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
436    
437    NLFFI-LIB:
438    * some cleanup (all cosmetic)
439    
440    NLFFIGEN:
441    * temporarily disabled the mechanism that suppresses ML output for
442      C definitions whose identifiers start with an underscore character
443    * generate val bindings for enum constants
444    * user can request that only one style (light or heavy) is being used;
445      default is to use both (command-line arguments: -heavy and -light)
446    * fixed bug in handling of function types involving incomplete pointers
447    * generate ML entry points that take record arguments (i.e., using
448      named arguments) for C functions that have a prototype with named
449      arguments
450      (see changes to CKIT)
451    
452    ----------------------------------------------------------------------
453    Name: Allen Leung
454    Date: 2001/10/27 20:34:00 EDT
455    Tag: leunga-20011027-x86-fast-fp-call
456    Description:
457    
458       Fixed the bug described in blume-20010920-slowfp.
459    
460       The fix involves
461          1. generating FCOPYs in FSTP in ia32-svid
462          2. marking a CALL with the appropriate annotation
463    
464    ----------------------------------------------------------------------
465    Name: Matthias Blume
466    Date: 2001/10/16 11:32:00 EDT
467    Tag: blume-20011016-netbsd
468    Description:
469    
470    Underscore patch from Chris Richards (fixing problem with compiling
471    runtime system under recent NetBSD).
472    
473    ----------------------------------------------------------------------
474    Name: Allen Leung
475    Date: 2001/10/12 17:18:32 EDT 2001
476    Tag: leung-20011012-x86-printflowgraph
477    Description:
478    
479    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
480    
481    ----------------------------------------------------------------------
482    Name: Lal George
483    Date: 2001/10/11 23:51:34 EDT
484    Tag: george-20011011-too-many-instrs
485    Description:
486    
487    The representation of a program point never expected to see more
488    than 65536 instructions in a basic block!
489    
490    ----------------------------------------------------------------------
491    Name: Lal George
492    Date: 2001/10/09 09:41:37 EDT
493    Tag: george-20011008-mlrisc-labels
494    Description:
495    
496    Changed the machine description files to support printing of
497    local and global labels in assembly code, based on host assembler
498    conventions.
499    
500    ----------------------------------------------------------------------
501    Name: Matthias Blume
502    Date: 2001/09/25 15:25:00 EDT
503    Tag: blume-20010925-exninfo
504    Description:
505    
506    I provided a non-hook implementation of exnName (at the toplevel) and
507    made the "dummy" implementation of exnMessage (at the toplevel) more
508    useful: if nothing gets "hooked in", then at least you are going to
509    see the exception name and a message indicating why you don't see more.
510    
511    [For the time being, programs that need exnMessage and want to use
512    ml-build should either use General.exnMessage (strongly recommended) or
513    refer to structure General at some other point so that CM sees a
514    static dependency.]
515    
516    [Similar remarks go for "print" and "use":  If you want to use their
517    functionality in stand-alone programs generated by ml-build, then use
518    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
519    
520    ----------------------------------------------------------------------
521    Name: Matthias Blume
522    Date: 2001/09/20 17:28:00 EDT
523    Tag: blume-20010920-slowfp
524    Description:
525    
526    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
527    
528    ----------------------------------------------------------------------
529    Name: Matthias Blume
530    Date: 2001/09/20 17:20:00 EDT
531    Tag: blume-20010920-canonicalpaths
532    Description:
533    
534    0. Updated the BOOT file (something that I forgot to do earlier).
535    
536    1. Small internal change to CM so that it avoids "/../" in filenames
537       as much as possible (but only where it is safe).
538    
539    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
540       that arguments that contain delimiters are passed through correctly.
541       This change also means that all "special" arguments of the form
542       @SMLxxx... must come first.
543    
544    3. Changed install script to put relative anchor names for tool commands
545       into pathconfig.
546    
547    ----------------------------------------------------------------------
548    Name: Matthias Blume
549    >>>>>>> 1.169
550    Date: 2001/09/18 15:35:00 EDT
551    Tag: blume-20010918-readme11036
552    Description:
553    
554    Added README files.
555    
556    ----------------------------------------------------------------------
557    Name: Matthias Blume
558    Date: 2001/09/18 11:45:00 EDT
559    Tag: Release_110_36 (retag)
560    Description:
561    
562    Fixed mistake in config/preloads. Retagged as 110.36.
563    
564    ----------------------------------------------------------------------
565    Name: Matthias Blume
566    Date: 2001/09/18 09:40:00 EDT
567    Tag: Release_110_36_orig (tag changed)
568    Description:
569    
570    New version (110.36).  New bootfiles.
571    
572    ----------------------------------------------------------------------
573    Name: Matthias Blume
574    Date: 2001/09/14 16:15:00 EDT
575    Tag: blume-20010914-x86fastfp
576    Description:
577    
578    John committed some changes that Allen made, in particular a (hopefully)
579    correctly working version of the x86-fp module.
580    
581    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
582    flag to "true".  Everything seems to compile to a fixpoint ok, and
583    "mandelbrot" speeds up by about 15%.
584    
585    ----------------------------------------------------------------------
586    Name: Matthias Blume
587    Date: 2001/09/13 11:20:00 EDT
588    Tag: blume-20010913-minimal
589    Description:
590    
591    1. Stefan Monnier's patch to fix a miscompilation problem that
592       was brought to light by John Reppy's work on Moby.
593    
594    2. Implemented a minimal "structure Compiler" that contains just
595       "version" and "architecture".  The minimal version will be
596       available when the full version is not.  This is for backward-
597       compatibility with code that wants to test Compiler.version.
598    
599    ----------------------------------------------------------------------
600    Name: Matthias Blume
601    Date: 2001/08/28 14:03:00 EDT
602    Tag: blume-20010828-ml-lex
603    Description:
604    
605    Fix for bug 1581, received from Neophytos Michael.
606    
607    ----------------------------------------------------------------------
608    Name: Matthias Blume
609    Date: 2001/08/27 11:20:00 EDT
610    Tag: blume-20010827-readme11035
611    Description:
612    
613    Fleshed out the README file for 110.35.
614    
615    ----------------------------------------------------------------------
616    Name: Matthias Blume
617    Date: 2001/08/24 17:10:00 EDT
618    Tag: Release_110_35
619    Description:
620    
621    New version number (110.35).  New bootfiles.
622    
623    ----------------------------------------------------------------------
624    Name: Lal George
625    Date: 2001/08/24 13:47:18 EDT 2001
626    Tag: george-20010824-MLRISC-graphs
627    Description:
628    
629     removed clusters from MLRISC completely and replaced with graphs.
630    
631    ----------------------------------------------------------------------
632    Name: Matthias Blume
633    Date: 2001/08/23 17:50:00 EDT
634    Tag: blume-20010823-toplevel
635    Description:
636    
637    - some reorganization of the code that implements various kinds of
638      environments in the compiler (static, dynamic, symbolic, combined)
639    - re-implemented the EnvRef module so that evalStream works properly
640      (if the stream contains references to "use", "CM.make", etc.)
641    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
642    
643    ----------------------------------------------------------------------
644    Name: Matthias Blume
645    Date: 2001/08/20 15:50 EDT
646    Tag: blume20010820-slipup
647    Description:
648    
649    I forgot to commit a few files.  Here they are...
650    
651    ----------------------------------------------------------------------
652    Name: Matthias Blume
653    Date: 2001/08/20 15:35:00 EDT
654    Tag: blume-20010820-debugprof
655    Description:
656    
657    !!!! NEW BOOTFILES !!!!
658    
659    This is another round of reorganizing the compiler sources.  This
660    time the main goal was to factor out all the "instrumentation"
661    passes (for profiling and backtracing) into their own library.
662    The difficulty was to do it in such a way that it does not depend
663    on elaborate.cm but only on elabdata.cm.
664    
665    Therefore there have been further changes to both elaborate.cm and
666    elabdata.cm -- more "generic" things have been moved from the former
667    to the latter.  As a result, I was forced to split the assignment
668    of numbers indicating "primtyc"s into two portions: SML-generic and
669    SML/NJ-specific.  Since it would have been awkward to maintain,
670    I bit the bullet and actually _changed_ the mapping between these
671    numbers and primtycs.  The bottom line of this is that you need
672    a new set of bin- and bootfiles.
673    
674    I have built new bootfiles for all architectures, so doing a fresh
675    checkout and config/install.sh should be all you need.
676    
677    The newly created library's name is
678    
679        $smlnj/viscomp/debugprof.cm
680    
681    and its sources live under
682    
683        src/compiler/DebugProf
684    
685    ----------------------------------------------------------------------
686    Name: Matthias Blume
687    Date: 2001/08/15 17:15:00 EDT
688    Tag: blume-20010815-compreorg
689    Description:
690    
691    This is a first cut at reorganizing the CM libraries that make up the
692    core of the compiler.  The idea is to separate out pieces that could
693    be used independently by tools, e.g., the parser, the typechecker, etc.
694    
695    The current status is a step in this direction, but it is not quite
696    satisfactory yet.  Expect more changes in the future.
697    
698    Here is the current (new) organization...
699    
700        What used to be $smlnj/viscomp/core.cm is now divided into
701        six CM libraries:
702    
703             $smlnj/viscomp/basics.cm
704                           /parser.cm
705                           /elabdata.cm
706                           /elaborate.cm
707                           /execute.cm
708                           /core.cm
709    
710        The CM files for these libraries live under src/system/smlnj/viscomp.
711        All these libraries are proxy libraries that contain precisely
712        one CM library component.  Here are the locations of the components
713        (all within the src/compiler tree):
714    
715             Basics/basics.cm
716             Parse/parser.cm
717             ElabData/elabdata.cm
718             Elaborator/elaborate.cm
719             Execution/execute.cm
720             core.cm
721    
722         [This organization is the same that has been used already
723         for a while for the architecture-specific parts of the visible
724         compiler and for the old version of core.cm.]
725    
726         As you will notice, many source files have been moved from their
727         respective original locations to a new home in one of the above
728         subtrees.
729    
730         The division of labor between the new libraries is the following:
731    
732             basics.cm:
733                - Simple, basic definitions that pertain to many (or all) of
734                  the other libraries.
735             parser.cm:
736                - The SML parser, producing output of type Ast.dec.
737                - The type family for Ast is also defined and exported here.
738             elabdata.cm:
739                - The datatypes that describe input and output of the elaborator.
740                  This includes types, absyn, and static environments.
741             elaborator.cm:
742                - The SML/NJ type checker and elaborator.
743                  This maps an Ast.dec (with a given static environment) to
744                  an Absyn.dec (with a new static environment).
745                - This libraries implements certain modules that used to be
746                  structures as functors (to remove dependencies on FLINT).
747             execute.cm:
748                - Everything having to do with executing binary code objects.
749                - Dynamic environments.
750             core.cm:
751                - SML/NJ-specific instantiations of the elaborator and MLRISC.
752                - Top-level modules.
753                - FLINT (this should eventually become its own library)
754    
755    Notes:
756    
757    I am not 100% happy with the way I separated the elaborator (and its
758    data structures) from FLINT.  Two instances of the same problem:
759    
760        1. Data structures contain certain fields that carry FLINT-specific
761           information.  I hacked around this using exn and the property list
762           module from smlnj-lib.  But the fact that there are middle-end
763           specific fields around at all is a bit annoying.
764    
765        2. The elaborator calculates certain FLINT-related information.  I tried
766           to make this as abstract as I could using functorization, but, again,
767           the fact that the elaborator has to perform calculations on behalf
768           of the middle-end at all is not nice.
769    
770        3. Having to used exn and property lists is unfortunate because it
771           weakens type checking.  The other alternative (parameterizing
772           nearly *everything*) is not appealing, though.
773    
774    I removed the "rebinding =" warning hack because due to the new organization
775    it was awkward to maintain it.  As a result, the compiler now issues some of
776    these warnings when compiling init.cmi during bootstrap compilation. On
777    the plus side, you also get a warning when you do, for example:
778       val op = = Int32.+
779    which was not the case up to now.
780    
781    I placed "assign" and "deref" into the _Core structure so that the
782    code that deals with the "lazy" keyword can find them there.  This
783    removes the need for having access to the primitive environment
784    during elaboration.
785    
786    ----------------------------------------------------------------------
787    Name: Matthias Blume
788    Date: 2001/08/13
789    Tag: blume-20010813-closures
790    Description:
791    
792    This fix was sent to us by Zhong Shao.  It is supposed to improve the
793    performance of certain loops by avoiding needless closure allocation.
794    
795    ----------------------------------------------------------------------
796    Name: Lal George
797    Date: 2001/07/31 10:03:23 EDT 2001
798    Tag: george-20010731-x86-fmalloc
799    Description: Fixed bug in x86 calls
800    
801        There was a bug where call instructions would mysteriously
802        vanish. The call instruction had to be one that returned
803        a floating point value.
804    
805    ----------------------------------------------------------------------
806    Name: Lal George
807    Date: 2001/07/19 16:36:29 EDT 2001
808    Tag: george-20010719-simple-cells
809    Description:
810    
811    I have dramatically simplified the interface for CELLS in MLRISC.
812    
813    In summary, the cells interface is broken up into three parts:
814    
815      1. CellsBasis : CELLS_BASIS
816    
817            CellsBasis is a top level structure and common for all
818            architectures.  it contains the definitions of basic datatypes
819            and utility  functions over these types.
820    
821      2. functor Cells() : CELLS
822    
823            Cells generates an interface for CELLS that incorporates the
824            specific resources on the target architecture, such as the
825            presence of special register classes, their number and size,
826            and various useful substructures.
827    
828      3. <ARCH>CELLS
829    
830            e.g. SparcCells: SPARCCELLS
831    
832            <ARCH>CELLS usually contains additional bindings for special
833            registers  on the architecture, such as:
834    
835                    val r0 : cell           (* register zero *)
836                    val y : cell            (* Y register *)
837                    val psr : cell          (* processor status register *)
838                    ...
839    
840            The structure returned by applying the Cells functor is opened
841            in this interface.
842    
843    The main implication of all this is that the datatypes for cells is
844    split between CellsBasis and CELLS -- a fairly simple change for user
845    code.
846    
847    In the old scheme the CELLS interface had a definitional binding of
848    the form:
849    
850            signature CELLS = sig
851    
852               structure CellsBasis = CellsBasis
853    
854               ...
855    
856            end
857    
858    With all the sharing constraints that goes on in MLRISC, this old
859    design  quickly leads to errors such as:
860    
861            "structure definition spec inside of sharing ... "
862    
863    
864    and appears to require an unacceptable amount of sharing and where
865    constraint hackery.
866    
867    I think this error message (the interaction of definitional specs and
868    sharing) requires more explanation on our web page.
869    
870    ----------------------------------------------------------------------
871    Name: Matthias Blume
872    Date: 2001/07/19 15:00:00 EDT
873    Tag: blume-20010719-libreorg
874    Description:
875    
876    This update puts together a fairly extensive but straightforward change
877    to the way the libraries that implement the interactive system are
878    organized:
879    
880       The biggest change is the elimination of structure Compiler.  As a
881       replacement for this structure, there is now a CM library
882       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
883       that exports all the substructures of the original structure Compiler
884       directly.  So instead of saying Compiler.Foo.bar one now simply
885       says Foo.bar.  (The CM libraries actually export a collection of
886       structures that is richer than the collection of substructures of
887       structure Compiler.)
888    
889       To make the transition smooth, there is a separate library called
890       $smlnj/compiler/compiler.cm which puts together and exports the
891       original structure Compiler (or at least something very close to it).
892    
893       There are five members of the original structure Compiler
894       that are not exported directly but which instead became members
895       of a new structure Backend (described by signature BACKEND).  These are:
896       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
897       Interact (: INTERACT), structure Machine (: MACHINE), and val
898       architecture (: string).
899    
900       Structure Compiler.Version has become structure CompilerVersion.
901    
902       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
903       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
904       or x86, respectively.
905       Each of these exports the same frontend structures that
906       $smlnj/compiler.cm exports.  But they do not have a structure Backend
907       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
908       Hppa, PPC, Sparc, or X86, respectively.
909    
910       Library $smlnj/compiler/all.cm exports the union of the exports of
911       $smlnj/compiler/<arch>.cm
912    
913       There are no structures <Arch>Compiler anymore, use
914       $smlnj/compiler/<arch>.cm instead.
915    
916       Library host-compiler-0.cm is gone.  Instead, the internal library
917       that instantiates CM is now called cm0.cm.  Selection of the host
918       compiler (backend) is no longer done here but. (Responsibility for it
919       now lies with $smlnj/compiler/current.cm.  This seems to be more
920       logical.)
921    
922       Many individual files have been moved or renamed.  Some files have
923       been split into multiple files, and some "dead" files have been deleted.
924    
925    Aside from these changes to library organization, there are also changes
926    to the way the code itself is organized:
927    
928       Structure Binfile has been re-implemented in such a way that it no
929       longer needs any knowledge of the compiler.  It exclusively deals
930       with the details of binfile layout.  It no longer invokes the
931       compiler (for the purpose of creating new prospective binfile
932       content), and it no longer has any knowledge of how to interpret
933       pickles.
934    
935       Structure Compile (: COMPILE) has been stripped down to the bare
936       essentials of compilation.  It no longer deals with linking/execution.
937       The interface has been cleaned up considerably.
938    
939       Utility routines for dealing with linking and execution have been
940       moved into their own substructures.
941    
942       (The ultimate goal of these changes is to provide a light-weight
943       binfile loader/linker (at least for, e.g., stable libraries) that
944       does not require CM or the compiler to be present.)
945    
946    CM documentation has been updated to reflect the changes to library
947    organization.
948    
949    ----------------------------------------------------------------------
950    Name: Matthias Blume
951    Date: 2001/07/10 17:30:00 EDT
952    Tag: Release_110_34
953    Description:
954    
955    Minor tweak to 110.34 (re-tagged):
956    
957      - README.html file added to CVS repository
958      - runtime compiles properly under FreeBSD 3.X and 4.X
959    
960    ----------------------------------------------------------------------
961    Name: Matthias Blume
962    Date: 2001/07/10 17:30:00 EDT
963    Tag: Release_110_34
964    Description:
965    
966    New version number (110.34). New bootfiles.
967    
968    ----------------------------------------------------------------------
969    Name: Matthias Blume
970    Date: 2001/07/09 16:00:00 EDT
971    Tag: blume-20010709-more-varargs
972    Description:
973    
974    I changed the handling of varargs in ml-nlffigen again:
975    The ellipsis ... will now simply be ignored (with an accompanying warning).
976    
977    The immediate effect is that you can actually call a varargs function
978    from ML -- but you can't actually supply any arguments beyond the ones
979    specified explicitly.  (For example, you can call printf with its format
980    string, but you cannot pass additional arguments.)
981    
982    This behavior is only marginally more useful than the one before, but
983    it has the advantage that a function or, more importantly, a function
984    type never gets dropped on the floor, thus avoiding follow-up problems with
985    other types that refer to the offending one.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/07/09 11:25:00 EDT
990    Tag: blume-20010709-varargs
991    Description:
992    
993    1. ckit-lib.cm now exports structure Error
994    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
995       with a warning accompanied by a source location.  Moreover, it
996       merely skips the offending function or type and proceeds with the
997       rest of its work.u  As a result, one can safely feed C code containing
998       "..." to ml-nlffigen.
999    3. There are some internal improvements to CM, providing slightly
1000       more general string substitutions in the tools subsystem.
1001    
1002    ----------------------------------------------------------------------
1003    Name: Matthias Blume
1004    Date: 2001/06/27 15:10:00 EDT
1005    Tag: blume-20010627-concur
1006    Description:
1007    
1008    Fixed a small bug in CM's handling of parallel compilation.
1009    (You could observe the bug by Control-C-interrupting an ordinary
1010    CMB.make or CM.stabilize and then attaching some compile servers.
1011    The result was that all of a sudden the previously interrupted
1012    compilation would continue on its own.  This was because of
1013    an over-optimization: CM did not bother to clean out certain queues
1014    when no servers were attached "anyway", resulting in the contents
1015    of these queues to grab control when new servers did get attached.)
1016    
1017    There is also another minor update to the CM manual.
1018    
1019    ----------------------------------------------------------------------
1020    Name: Matthias Blume
1021    Date: 2001/06/26 16:15:00 EDT
1022    Tag: blume-20010626-cmdoc
1023    Description:
1024    
1025    Minor typo fixed in CM manual (syntax diagram for libraries).
1026    
1027    ----------------------------------------------------------------------
1028    Name: Matthias Blume
1029    Date: 2001/06/25 22:55:00 EDT
1030    Tag: blume-20010625-x86pc
1031    Description:
1032    
1033    Fixed a nasty bug in the X86 assembly code that caused signal
1034    handlers to fail (crash) randomly.
1035    
1036    ----------------------------------------------------------------------
1037    Name: Matthias Blume
1038    Date: 2001/06/25 12:05:00 EDT
1039    Tag: blume-20010625-nlffigen
1040    Description:
1041    
1042    This update fixes a number of minor bugs in ml-nlffigen as reported by
1043    Nick Carter <nbc@andrew.cmu.edu>.
1044    
1045      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1046      2. Default names for generated files are now derived from the name of
1047         the C file *without its directory*.  In particular, this causes generated
1048         files to be placed locally even if the C file is in some system directory.
1049      3. Default names for generated signatures and structures are also derived
1050         from the C file name without its directory.  This avoids silly things
1051         like "structure GL/GL".
1052         (Other silly names are still possible because ml-nlffigen does not do
1053          a thorough check of whether generated names are legal ML identifiers.
1054          When in doubt, use command line arguments to force particular names.)
1055    
1056    ----------------------------------------------------------------------
1057    Name: Matthias Blume
1058    Date: 2001/06/21 12:25:00 EDT
1059    Tag: blume-20010621-eXene
1060    Description:
1061    
1062    eXene now compiles and (sort of) works again.
1063    
1064    The library name (for version > 110.33) is $/eXene.cm.
1065    
1066    I also added an new example in src/eXene/examples/nbody.  See the
1067    README file there for details.
1068    
1069    ----------------------------------------------------------------------
1070    Name: Matthias Blume
1071    Date: 2001/06/20 16:40:00 EDT
1072    Tag: blume-20010620-cml
1073    Description:
1074    
1075    CML now compiles and works again.
1076    
1077    Libraries (for version > 110.33):
1078    
1079      $cml/cml.cm            Main CML library.
1080      $cml/basis.cm          CML's version of $/basis.cm.
1081      $cml/cml-internal.cm   Internal helper library.
1082      $cml/core-cml.cm       Internal helper library.
1083      $cml-lib/trace-cml.cm  Tracing facility.
1084      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1085    
1086    The installer (config/install.sh) has been taught how to properly
1087    install this stuff.
1088    
1089    ----------------------------------------------------------------------
1090    Name: Matthias Blume
1091    Date: 2001/06/19 17:55:00 EDT
1092    Tag: blume-20010619-instantiate
1093    Description:
1094    
1095    This un-breaks the fix for bug 1432.
1096    (The bug was originally fixed in 110.9 but I broke it again some
1097    time after that.)
1098    
1099    ----------------------------------------------------------------------
1100    Name: Matthias Blume
1101    Date: 2001/06/19 17:25:00 EDT
1102    Tag: blume-20010619-signals
1103    Description:
1104    
1105    This should (hopefully) fix the long-standing signal handling bug.
1106    (The runtime system was constructing a continuation record with an
1107    incorrect descriptor which would cause the GC to drop data on the floor...)
1108    
1109    ----------------------------------------------------------------------
1110    Name: Matthias Blume
1111    Date: 2001/06/15 15:05:00 EDT
1112    Tag: blume-20010615-moresparc
1113    Description:
1114    
1115    Here is a short late-hour update related to Sparc c-calls:
1116    
1117     -- made handling of double-word arguments a bit smarter
1118    
1119     -- instruction selection phase tries to collapse certain clumsily
1120        constructed ML-Trees; typical example:
1121    
1122            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1123    
1124        This currently has no further impact on SML/NJ since mlriscGen does
1125        not seem to generate such patterns in the first place, and c-calls
1126        (which did generate them in the beginning) has meanwhile been fixed
1127        so as to avoid them as well.
1128    
1129    ----------------------------------------------------------------------
1130    Name: Matthias Blume
1131    Date: 2001/06/15 15:05:00 EDT
1132    Tag: blume-20010615-sparc
1133    Description:
1134    
1135    The purpose of this update is to provide an implementation of NLFFI
1136    on Sparc machines.
1137    
1138    Here are the changes in detail:
1139    
1140       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1141       the Sparc implementation of the c-calls API.
1142       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1143       for accessing the ML frame.  Thus, we have a real frame pointer and
1144       can freely modify %sp without need for an omit-frame-ptr phase.
1145       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1146       this case.
1147       * ml-nlffigen has been taught to produce code for different architectures
1148       and calling conventions.
1149       * In a way similar to what was done in the x86 case, the Sparc
1150       backend uses its own specific extension to mltree.  (For example,
1151       it needs to be able to generate UNIMP instructions which are part
1152       of the calling convention.)
1153       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1154       to make it easier to plug in new machine- and os-dependent parts).
1155    
1156    There are some other fairly unrelated bug fixes and cleanups as well:
1157    
1158       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1159       that they properly share their libraries with existing SML/NJ libraries.
1160       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1161       follow-up error messages.
1162       * Updates to CM/CMB documentation.
1163    
1164    TODO items:
1165    
1166       * MLRISC should use a different register as its asmTemp on the Sparc.
1167         (The current %o2 is a really bad choice because it is part of the
1168         calling conventions, so things might interfere in unexpected ways.)
1169    
1170    ----------------------------------------------------------------------
1171    Name: Matthias Blume
1172    Date: 2001/06/07
1173    Tag: blume-20010607-calls
1174    Description:
1175    
1176    A number of internal changes related to C calls and calling conventions:
1177    
1178    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1179       number of bytes popped implicitly (by the callee).  In most cases
1180       this field is 0 but on x86/win32 it is some non-zero value.  This
1181       is information provided for the benefit of the "omit-frameptr" pass.
1182    2. The CALL instruction on the x86 carries a similar "pops" field.
1183       The instruction selection phase copies its value from the ML-Tree
1184       CALL statement.
1185    3. On all other architectures, the instruction selection phase checks
1186       whether "pops=0" and complains if not.
1187    4. The c-calls implementation for x86 now accepts two calling conventions:
1188       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1189       up after the call and pops is set to 0.  For "stdcall", the caller
1190       does nothing, leaving the cleanup to the callee; pops is set to
1191       the number of bytes that were pushed onto the stack.
1192    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1193       distinguish between "ccall" and "stdcall".
1194    6. The UNIMP instruction has been added to the supported Sparc instruction
1195       set. (This is needed for implementing the official C calling convention
1196       on this architecture.)
1197    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1198       work with the latest CM.
1199    
1200    ----------------------------------------------------------------------
1201    Name: Matthias Blume
1202    Date: 2001/06/05 15:10:00 EDT
1203    Tag: blume-20010605-cm-index
1204    Description:
1205    
1206    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1207    
1208    1. CM can now generate "index files".  These are human-readable files
1209       that list on a per-.cm-file basis each toplevel symbol defined or
1210       imported.  The location of the index file for
1211       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1212       To enable index-file generation, set CM.Control.generate_index to true
1213       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1214    
1215       The CM manual has been updated accordingly.
1216    
1217    2. I made some slight modifications to the c-calls API in MLRISC.
1218    
1219         a) There is now a callback to support saving/restoring of
1220            dedicated but caller-save registers around the actual call
1221            instruction.
1222         b) One can optionally specify a comment-annotation for the
1223            call instruction.
1224    
1225    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1226       (For example, the comment annotation shows the C prototype of
1227        the function being called.)
1228    
1229    ----------------------------------------------------------------------
1230    Name: Matthias Blume
1231    Date: 2001/06/01 13:30:00 EDT
1232    Tag: blume-20010601-nlffi-cleanup
1233    Description:
1234    
1235    This is mostly a cleanup of MLFFI stuff:
1236    
1237       - some signature files have been put into a more exposed place
1238       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1239       - ml-nlffigen changed accordingly
1240       - tutorial updated
1241    
1242    Other changes:
1243    
1244       - author's affiliation in CM manual(s) updated
1245       - some more recognized keywords added to Allen's sml.sty
1246    
1247    ----------------------------------------------------------------------
1248    Name: Matthias Blume
1249    Date: 2001/05/25 15:30:00 EDT
1250    Tag: blume-20010525-iptr
1251    Description:
1252    
1253      - put the official 110.33-README (as it appears on the ftp server) under
1254        CVS
1255      - fixed a small bug related to incomplete pointer types in
1256        ml-nlffigen
1257      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1258        (it does not need the 'f type parameter)
1259    
1260    ----------------------------------------------------------------------
1261    Name: Matthias Blume
1262    Date: 2001/05/23 14:30:00 EDT
1263    Tag: Release_110_33
1264    Description:
1265    
1266    New version number (110.33).  New bootfiles.
1267    
1268    ----------------------------------------------------------------------
1269    Name: Matthias Blume
1270    Date: 2001/05/22 18:06:00 EDT
1271    Tag: blume-20010522-targets
1272    Description:
1273    
1274    Made install.sh use file config/targets.customized if it exists, falling
1275    back to config/targets if it doesn't.  This way one can have a customized
1276    version of the targets file without touching the "real thing", thus
1277    eliminating the constant fear of accidentally checking something bogus
1278    back into the CVS repository...  (File config/targets.customized must
1279    not be added to the repository!)
1280    
1281    ----------------------------------------------------------------------
1282    Name: Matthias Blume
1283    Date: 2001/05/22 16:30:00 EDT
1284    Tag: blume-20010522-minitut
1285    Description:
1286    
1287    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1288       struct returns.
1289    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1290       incomplete, preliminary documentation for NLFFI.
1291    
1292    ----------------------------------------------------------------------
1293    Name: Matthias Blume
1294    Date: 2001/05/14 11:30:00 EDT
1295    Tag: blume-20010514-script
1296    Description:
1297    
1298    Some bugs in install script fixed.
1299    
1300    In addition to that I also made a slight change to the NLFFI API:
1301    Functors generated by ml-nlffigen now take the dynamic library as a
1302    straight functor argument, not as a suspended one.  (The original
1303    functor code used to force the suspension right away anyway, so there
1304    was nothing gained by this complication of the interface.)
1305    
1306    ----------------------------------------------------------------------
1307    Name: Matthias Blume
1308    Date: 2001/05/11 14:35:00 EDT
1309    Tag: blume-20010511-ml-nlffi
1310    Description:
1311    
1312    I finally took the plunge and added my new FFI code to the main
1313    repository.  For x86-linux it is now ready for prime-time.
1314    
1315    There are two new subdirectories of "src":
1316    
1317      - ml-nlffi-lib:
1318           The utility library for programs using the FFI interface.
1319           Here is the implementation of $/c.cm and its associated low-level
1320           partners $/c-int.cm and $/memory.cm.
1321      - ml-nlffigen:
1322           A stand-alone program for generating ML glue code from C source
1323           code.
1324    
1325    Building ml-nlffigen requires $/ckit-lib.cm.
1326    
1327    The config/install.sh script has been updates to do the Right Thing
1328    (hopefully).
1329    
1330    Notice that the source tree for the C-Kit will not be put under "src"
1331    but directly under the installation root directory.  (This is the
1332    structure that currently exists on the CVS server when you check out
1333    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1334    
1335    Bugs: No documentation yet.
1336    
1337    ----------------------------------------------------------------------
1338    Name: Matthias Blume
1339    Date: 2001/05/09 16:35:00 EDT
1340    Tag: blume-20010509-cpscontract
1341    Description:
1342    
1343    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1344    wrapper/unwrapper elimination did not decrement usage counts and some
1345    dead variables got overlooked by the dead-up logic.)
1346    
1347    ----------------------------------------------------------------------
1348    Name: Lal George
1349    Date: 2001/05/08  17:26:09 EDT
1350    Tag: george-20010508-omit-frameptr
1351    Description:
1352    
1353    Changes to implement the omit-frame-pointer optimization to support
1354    raw C calls. For now, there is only support on the Intel x86, but
1355    other architectures will follow as more experience is gained with this.
1356    
1357    
1358    ----------------------------------------------------------------------
1359    Name: Matthias Blume
1360    Date: 2001/05/07 14:40:00 EDT
1361    Tag: blume-20010507-proxies
1362    Description:
1363    
1364    I made into "proxy libraries" all libraries that qualify for such a
1365    change.  (A qualifying library is a library that has another library or
1366    groups as its sole member and repeats that member's export list
1367    verbatim.  A proxy library avoids this repetition by omitting its export
1368    list, effectively inheriting the list that its (only) member exports.
1369    See the CM manual for more explanation.)
1370    The main effect is that explicit export lists for these libraries
1371    do not have to be kepts in sync, making maintenance a bit easier.
1372    
1373    I also added copyright notices to many .cm-files.
1374    
1375    Last but not least, I made a new set of bootfiles.
1376    
1377    ----------------------------------------------------------------------
1378    Name: Matthias Blume
1379    Date: 2001/05/04 17:00:00 EDT
1380    Tag: blume-20010504-cm-lsplit
1381    Description:
1382    
1383    0. John merged pending changes to $/smlnj-lib.cm
1384    
1385    1. Allen's previous change accidentally backed out of one of Lal's
1386       earlier changes.  I undid this mistake (re-introducing Lal's change).
1387    
1388    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1389       within the compiler where applicable.  There is some code simplification
1390       because of that.
1391    
1392    3. The "split" phase (in FLINT) is now part of the default list of phases.
1393       Compiler.Control.LambdaSplitting.* can be used to globally control the
1394       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1395       it can now also be controlled on a per-source basis: CM has been taught
1396       a new tool parameter applicable to ML source files.
1397    
1398       - To turn lambda-splitting off completely:
1399            local open Compiler.Control.LambdaSplitting in
1400                val _ = set Off
1401            end
1402       - To make "no lambda-splitting" the global default (but allow per-source
1403         overriding); this is the initial setting:
1404            local open Compiler.Control.LambdaSplitting in
1405                val _ = set (Default NONE)
1406            end
1407       - To make "lambda-splitting with aggressiveness a" the global default
1408         (and allow per-source overriding):
1409            local open Compiler.Control.LambdaSplitting in
1410                val _ = set (Default (SOME a))
1411            end
1412    
1413       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1414         write (in the respective .cm-file):
1415            a.sml (lambdasplitting:off)
1416       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1417            a.sml (lambdasplitting:on)
1418       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1419         <a> is a decimal non-negative integer):
1420            a.sml (lambdasplitting:<a>)
1421       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1422            a.sml (lambdasplitting:infinity)
1423       - To use the global default for a.sml:
1424            a.sml (lambdasplitting:default)
1425         or simply
1426            a.sml
1427    
1428    ----------------------------------------------------------------------
1429    Name: Allen Leung
1430    Date: 2001/05/04 01:57:00 EDT
1431    Tag: leunga-20010504-sync
1432    Description:
1433    
1434      MLRISC features.
1435    
1436      1. Fix to CMPXCHG instructions.
1437      2. Changed RA interface to allow annotations in callbacks.
1438      3. Added a new method to the stream interface to allow annotations updates.
1439    
1440    ----------------------------------------------------------------------
1441    Name: Matthias Blume
1442    Date: 2001/05/01 11:45:00 EDT
1443    Tag: blume-20010501-pcedittmp
1444    Description:
1445    
1446    Changed install.sh to use the current working directory instead of
1447    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1448    of /usr/tmp caused trouble with MacOS X because of file premission
1449    problems.
1450    
1451    ----------------------------------------------------------------------
1452    Name: Matthias Blume
1453    Date: 2001/04/20 11:10:00 EDT
1454    Tag: blume-20010420-inMLflag
1455    Description:
1456    
1457     - added vp_limitPtrMask to vproc-state.h
1458       (for use by the raw-C-calls mechanism to implement proper interrupt
1459        handling)
1460     - made the ML compiler aware of various data-structure offsets so it
1461       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1462     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1463       raw C-calls
1464    
1465    ----------------------------------------------------------------------
1466    Name: Lal George
1467    Date: 2001/04/20 09:15:28 EDT
1468    Tag: george-20010420-macosX
1469    Description:
1470    
1471     - Changes to port to Mac OS X; Darwin.
1472    
1473     - In the process I found that sqrt was broken on the PPC, because the
1474       fsqrt instruction is not implemented.
1475    
1476    ----------------------------------------------------------------------
1477    Name: Matthias Blume
1478    Date: 2001/04/18 12:45:00 EDT
1479    Tag: blume-20010418-ccalls
1480    Description:
1481    
1482     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1483       (this bug prevented structure arguments containing pointers from being
1484        passed correctly)
1485     - changed the raw-C-call code in mlriscGen.sml in such a way that
1486       structure arguments are represented as a pointer to the beginning
1487       of the structure (instead of having a series of synthesized arguments,
1488       one for each structure member)
1489    
1490     - made makeml script's verbosity level configurable via environment
1491       variable (MAKEML_VERBOSITY)
1492    
1493     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1494       in rawmem-x86.sml; we are now using the real thing
1495    
1496    ----------------------------------------------------------------------
1497    Name: Matthias Blume
1498    Date: 2001/03/22 16:25:00 EST
1499    Tag: blume-20010322-bootfiles
1500    Description:
1501    
1502    Created a new set of bootfiles (for your automatic installation convenience).
1503    
1504    ----------------------------------------------------------------------
1505    Name: Matthias Blume
1506    Date: 2001/03/22 15:10:00 EST
1507    Tag: blume-20010322-rawmem-parcm
1508    Description:
1509    
1510    1. All "raw memory access" primitives for the new FFI are implemented now
1511       (at least on the x86).
1512    2. Some further cleanup of CM's parallel make mechanism.
1513    
1514    ----------------------------------------------------------------------
1515    Name: Matthias Blume
1516    Date: 2001/03/19 17:53:00 EST
1517    Tag: blume-20010319-parallel
1518    Description:
1519    
1520    Parallel make (using compile servers) now works again.
1521    
1522    To this end, CM.stabilize and CMB.make have been modified to work in
1523    two passes when compile servers are attached:
1524       1. Compile everything, do not perform stabilization; this pass
1525          uses compile servers
1526       2. Stabilize everything; this pass does not use compile servers
1527    If there are no compile servers, the two passes are combined into one
1528    (as before).  Splitting the passes increases the inherent parallelism
1529    in the dependency graph because the entire graph including all
1530    libraries is available at the same time.  This, in turn, improves
1531    server utilization.  The downside is that the master process will
1532    have to do some extra work after compilation is done (because for
1533    technical reasons it must re-read all the binfiles during stabilization).
1534    
1535    ----------------------------------------------------------------------
1536    Name: Matthias Blume
1537    Date: 2001/03/16 12:22:00 EST
1538    Tag: blume-20010316-bootfiles
1539    Description:
1540    
1541    Created a new set of bootfiles (for your automatic installation convenience).
1542    
1543    ----------------------------------------------------------------------
1544    Name: Matthias Blume
1545    Date: 2001/03/16 11:00:00 EST
1546    Tag: blume-20010316-MLTREE-fixup
1547    Description:
1548    
1549    This is a minor fixup for an (untagged) earlier commit by Allen.
1550    (A file was missing).
1551    
1552    ----------------------------------------------------------------------
1553    Name: Allen Leung
1554    Date: Mon Mar  5 18:54:57 EST 2001
1555    Tag: leunga-20010305-cut-support
1556    
1557    1. New support for alternative control-flow in MLTREE.
1558       Currently we support
1559    
1560          FLOW_TO(CALL ...., [k1,...,kn])
1561    
1562       This is needed for 'cuts to' in C-- and try/handle-like constructs
1563       in Moby
1564    
1565       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1566    
1567    2. Register Allocator
1568    
1569       Changes in interface [from Fermin, John]
1570    
1571    3. Alpha 8-bit SLL support [Fermin]
1572    
1573    4. All architectures
1574    
1575       A new module (ClusterExpandCopies) for expanding parallel copies.
1576    
1577    ----------------------------------------------------------------------
1578    Name: Allen Leung
1579    Date: 2001/02/27 23:07:00 EST
1580    Tag: leunga-20010227-minor-stuff
1581    
1582    1. Alpha bug fix for CMOVNE
1583    2. Handle mltree COND(..,FCMP ...,...)
1584    3. Bug fix in simplifier
1585    
1586    ----------------------------------------------------------------------
1587    Name: Matthias Blume
1588    Date: 2001/01/30 17:50:00 EST
1589    Tag: blume-20010130-sync
1590    Description:
1591    
1592    This is just a minor update to sync my devel branch with the main brach.
1593    The only visible change is the addition of some README files.
1594    
1595    ----------------------------------------------------------------------
1596    Name: Matthias Blume
1597    Date: 2001/01/12 23:30:00 JST
1598    Tag: blume-20010112-bootfiles
1599    Description:
1600    
1601    Made a new set of bootfiles that goes with the current state of the
1602    repository.
1603    
1604    ----------------------------------------------------------------------
1605    Name: Matthias Blume
1606    Date: 2001/01/12 21:20:00 JST
1607    Tag: blume-20010112-sync
1608    Description:
1609    
1610    I am just flushing out some minor changes that had accumulated in
1611    my private branch in order to sync with the main tree.  (This is
1612    mainly because I had CVS trouble when trying to merge _into_ my
1613    private branch.)
1614    
1615    Most people should be completely unaffected by this.
1616    
1617    ----------------------------------------------------------------------
1618    Name: Allen Leung
1619    Date: Thu Jan 11 21:03:00 EST 2001
1620    Tag: leunga-20010111-labexp=mltree
1621    Description:
1622    
1623    1.  Removed the type LabelExp and replace it by MLTree.
1624    2.  Rewritten mltree-simplify with the pattern matcher tool.
1625    3.  There were some bugs in alpha code generator which would break
1626        64-bit code generation.
1627    4.  Redo the tools to generate code with the
1628    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1629        are now generated by perl scripts.
1630    
1631    ----------------------------------------------------------------------
1632    Name: Matthias Blume
1633    Date: 2001/01/10 21:55:00 JST
1634    Tag: blume-20010110-rcc
1635    Description:
1636    
1637    The RCC stuff now seems to work (but only on the x86).
1638    This required hacking of the c-calls interface (and -implementation) in
1639    MLRISC.
1640    
1641    Normal compiler users should be unaffected.
1642    
1643    ----------------------------------------------------------------------
1644    Name: Matthias Blume
1645    Date: 2001/01/09 01:20:00 JST
1646    Tag: blume-20010109-rcc
1647    Description:
1648    
1649    This is a fairly big patch, flushing out a large number of pending
1650    changes that I made to my development copy over the last couple of days.
1651    
1652    Of practical relevance at this moment is a workaround for a pickling
1653    bug that Allen ran into the other day.  The cause of the bug itself is
1654    still unknown and it might be hard to fix it properly, but the
1655    workaround has some merits of its own (namely somewhat reducing pickling
1656    overhead for certain libraries).  Therefore, I think this solution should
1657    be satisfactory at this time.
1658    
1659    The rest of the changes (i.e., the vast majority) has to do with my
1660    ongoing efforts of providing direct support for C function calls from
1661    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1662    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1663    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1664    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1665    handle RCC.
1666    
1667    The last part (the changes to mlriscGen.sml) are still known to be
1668    wrong on the x86 and not implemented on all other architectures.  But
1669    the infrastructure is in place. I had to change a few functor
1670    signatures in the backend to be able to route the CCalls interface
1671    from MLRISC there, and I had to specialize the mltree type (on the
1672    x86) to include the necessary extensions. (The extensions themselves
1673    were already there and redy to go in MLRISC/x86).
1674    
1675    Everything should be very happy as soon as someone helps me with
1676    mlriscGen.sml...
1677    
1678    In any case, nothing of this should matter to anyone as long as the
1679    new primop is not being used (which is going to be the case unless you
1680    find it where I hid it :). The rest of the compiler is completely
1681    unaffected.
1682    
1683    ----------------------------------------------------------------------
1684    Name: Matthias Blume
1685    Date: 2001/01/05 00:30:00 JST
1686    Tag: blume-20010105-primops
1687    Description:
1688    
1689    Added some experimental support for work that I am doing right now.
1690    These changes mostly concern added primops, but there is also a new
1691    experimental C library in the runtime system (but currently not enabled
1692    anywhere except on Linux/X86).
1693    
1694    In the course of adding primops (and playing with them), I discovered that
1695    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1696    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1697    To recover, I made type information in INL_PRIM mandatory and changed
1698    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1699    has complete, correct type information (i.e., no bottom types).
1700    
1701    Since all these changes mean that we need new binfiles, I also bumped the
1702    version number to 110.32.1.
1703    
1704    ----------------------------------------------------------------------
1705    Name: Matthias Blume
1706    Date: 2000/12/30 22:10:00 JST
1707    Tag: blume-20001230-various
1708    Description:
1709    
1710    Added proxy libraries for MLRISC and let MLRISC libraries refer
1711    to each other using path anchors.  (See CM manual for explanation.)
1712    
1713    Updated CM documentation.
1714    
1715    Fixed some bugs in CM.
1716    
1717    Implemented "proxy" libraries (= syntactic sugar for CM).
1718    
1719    Added "-quiet" option to makeml and changed runtime system accordingly.
1720    
1721    Added cleanup handler for exportML to reset timers and compiler stats.
1722    
1723    ----------------------------------------------------------------------
1724    Name: Lal George
1725    Date: 2000/12/22 22:22:58 EST 2000
1726    Tag: Release_110_32
1727    Description:
1728    
1729            Infinite precision used throughout MLRISC.
1730            see MLRISC/mltree/machine-int.sig
1731    
1732    ----------------------------------------------------------------------
1733    Name: Matthias Blume
1734    Date: 2000/12/22 23:16:00 JST
1735    Tag: blume-20001222-warn
1736    Description:
1737    
1738    Corrected wording and formatting of some CM warning message which I
1739    broke in my previous patch.
1740    
1741    ----------------------------------------------------------------------
1742    Name: Matthias Blume
1743    Date: 2000/12/22 21:20:00 JST
1744    Tag: blume-20001222-anchorenv
1745    Description:
1746    
1747    Fixed CM's handling of anchor environments in connection with CMB.make.
1748    
1749    ----------------------------------------------------------------------
1750    Name: Matthias Blume
1751    Date: 2000/12/22 13:15:00 JST
1752    Tag: blume-20001222-cleanup
1753    Description:
1754    
1755    Removed src/cm/ffi which does not (and did not) belong here.
1756    
1757    ----------------------------------------------------------------------
1758    Name: Matthias Blume
1759    Date: 2000/12/21 23:55:00 JST
1760    Tag: blume-20001221-exn
1761    Description:
1762    
1763    Probably most important: CM no longer silently swallows all exceptions
1764    in the compiler.
1765    Plus: some other minor CM changes.  For example, CM now reports some
1766    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1767    
1768    ----------------------------------------------------------------------
1769    Name: Matthias Blume
1770    Date: 2000/12/15 00:01:05 JST
1771    Tag: blume-20001215-dirtool
1772    Description:
1773    
1774    - "dir" tool added.
1775    - improvements and cleanup to Tools structure
1776    - documentation updates
1777    
1778    ----------------------------------------------------------------------
1779    Name: Allen Leung
1780    Date: Thu Dec 14 03:45:24 EST 2000
1781    Description:
1782    Tag:  leunga-20001214-int-inf
1783    Description:
1784    
1785       In IntInf, added these standard functions, which are missing from our
1786    implementation:
1787    
1788        andb : int * int -> int
1789        xorb : int * int -> int
1790        orb  : int * int -> int
1791        notb : int -> int
1792         <<   : int * word -> int
1793        ~>>  : int * word -> int
1794    
1795       Not tested, I hope they are correct.
1796    
1797    ----------------------------------------------------------------------
1798    Name: Allen Leung
1799    Date: Fri Dec  8 19:23:26 EST 2000
1800    Description:
1801    Tag:  leunga-20001208-nowhere
1802    Description:
1803    
1804      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1805    to generate better error messages etc.  Plus a brief manual.
1806    
1807    ----------------------------------------------------------------------
1808    Name: Lal George
1809    Date: 2000/12/08 09:54:02 EST 2000
1810    Tag: Release_110_31
1811    Description:
1812    
1813    - Version 110.31
1814    ----------------------------------------------------------------------
1815    Name: Allen Leung
1816    Date: Thu Dec  7 22:01:04 EST 2000
1817    Tag:  leunga-20001207-cell-monster-hack
1818    Description:
1819    
1820    Major MLRISC internal changes.  Affect all clients.
1821    Summary:
1822    
1823    1.  Type CELLS.cell = int is now replaced by a datatype.
1824        As a result, the old regmap is now gone.  Almost all interfaces
1825        in MLRISC change as a consequence.
1826    
1827    2.  A new brand version of machine description tool (v3.0) that generates
1828        modules expecting the new interface.  The old version is removed.
1829    
1830    3.  The RA interface has been further abstracted into two new functors.
1831        RISC_RA and X86RA.  These functors have much simpler interfaces.
1832        [See also directory MLRISC/demo.]
1833    
1834    4.  Some other new source->source code generation tools are available:
1835    
1836        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1837        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1838           I use this tool to generate the peephole optimizers---with the new
1839           cell type changes, peephole rules are becoming difficult to write
1840           without conditional pattern matching.
1841    
1842    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1843        cover the entire MLRISC source tree so many things broke.
1844    
1845    6.  CM files have been moved to the subdirectory MLRISC/cm.
1846        They are moved because there are a lot of them and they clutter up the
1847        root dir.
1848    
1849    7.  More detailed documentation to come...
1850    
1851        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1852        a makeml -rebuild first.  This is because of other other
1853        changes that Matthias has made (see below).
1854    
1855    
1856    ----------------------------------------------------------------------
1857    Name: Matthias Blume
1858    Date: 2000/11/30 23:12:00 JST
1859    Tag: blume-20001130-filereorg
1860    Description:
1861    
1862    Some manual updates and some file reorganizations in CM.
1863    
1864    ----------------------------------------------------------------------
1865    Name: Matthias Blume
1866    Date: 2000/11/24 17:45:00 JST
1867    Tag: blume-20001124-link
1868    Description:
1869    
1870    Drastically improved link traversal code for the case that the dynamic
1871    value was already loaded at bootstrap time.  As a result, CM and CMB
1872    now both load blazingly fast -- even on a very slow machine.  Also,
1873    memory consumption has been further reduced by this.
1874    
1875    Warning: The format of the PIDMAP file has changed.  THerefore, to
1876    bootstrap you have to do this:
1877    
1878    1. Run CMB.make
1879    2. Make a symbolic link for the boot directory:
1880         ln -s sml.boot.ARCH-OS xxx
1881    3. "Rebuild" the boot directory:
1882         ./makeml -boot xxx -rebuild sml ; rm xxx
1883    4. Boot normally:
1884          ./makeml
1885    
1886    ----------------------------------------------------------------------
1887    Name: Matthias Blume
1888    Date: 2000/11/21 21:20:00 JST
1889    Tag: blume-20001121-tools
1890    Description:
1891    
1892    Continued hacking on autoloading problem -- with success this time.
1893    Also changed tool-plugin mechanism.  See new CM manual.
1894    
1895    ----------------------------------------------------------------------
1896    Name: Matthias Blume
1897    Date: 2000/11/19 14:30:00 JST
1898    Tag:  blume-20001119-autoload
1899    Description:
1900    
1901    Some hacking to make autoloading faster.  Success for CMB, no success
1902    so far for CM.  There is a reduced structure CM' that autoloads faster.
1903    (This is a temporary, non-documented hack to be eliminated again when
1904    the general problem is solved.)
1905    
1906    ----------------------------------------------------------------------
1907    Name: Matthias Blume
1908    Date: 2000/11/17 14:10:00 JST
1909    Tag: blume-20001117-pickle-lib
1910    Description:
1911    
1912    1. Eliminated comp-lib.cm
1913    2. Made pickle-lib.cm
1914    3. Eliminated all uses of intset.sml (from comp-lib.cm)
1915    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1916       equivalent constructs from smlnj-lib.cm (INtHashTable).
1917    5. Point 4. also goes for those uses of intmap.* in MLRISC.
1918       Duplicated intmap modules thrown out.
1919    6. Hunted down all duplicated SCC code and replaced it with
1920       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1921    7. Rewrote Feedback module.
1922    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
1923       should be thrown out and equivalent modules from smlnj-lib.cm
1924       should be used (IntRedBlackSet, IntListSet, ...).
1925    
1926    Confirmed that compiler compiles to fixpoint.
1927    
1928    ----------------------------------------------------------------------
1929    Name: Allen Leung
1930    Date: 2000/11/10 18:00:00
1931    Tag: leunga-20001110-new-x86-fp
1932    
1933    A new x86 floating point code generator has been added.
1934    By default this is turned off.  To turn this on, do:
1935    
1936        CM.autoload "$smlnj/compiler.cm";
1937        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
1938    
1939    Changes:
1940    
1941    1.  Changed FTAN to FPTAN so that the assembly output is correct.
1942    2.  Changed the extension callback for FTANGENT to generate:
1943    
1944              fptan
1945              fstp  %st(0)
1946        instead of
1947              fptan
1948              fstpl ftempmem
1949    
1950    3.  Numerous assembly fixes for x86.
1951    
1952    5.  Cleaned up the machine code output module x86/x86MC.sml and added
1953        support for a whole bunch of instructions and addressing modes:
1954    
1955          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
1956          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
1957          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
1958          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
1959          fxch %st(n)
1960          fld %st(n)
1961          fst %st(n)
1962          fst mem
1963          fstp %st(n)
1964          fucom %st(n)
1965          fucomp %st(n)
1966    
1967        All these are now generated when the fast fp mode is turned on.
1968    
1969    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
1970    
1971    ----------------------------------------------------------------------
1972    Name: Matthias Blume
1973    Date: 2000/11/09 11:20:00 JST
1974    Tag: blume-20001109-scc
1975    Description:
1976    
1977    Eliminated some code duplication:
1978    
1979    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
1980       (Otherwise the functor is useless.)
1981    2. Used GraphSCCFn where SCCUtilFun was used previously.
1982    3. Got rid of SCCUtilFun (in comp-lib.cm).
1983    
1984    ----------------------------------------------------------------------
1985    Name: Lal George
1986    Date: 2000/11/06 09:02:21 EST 2000
1987    Tag: Release_110_30
1988    Description:
1989    
1990    - Version 110.30
1991    ----------------------------------------------------------------------
1992    Name: Matthias Blume
1993    Date: 2000/11/04 14:45:00
1994    Tag: blume-20001104-mlbuild
1995    Description:
1996    
1997    - Made ml-build faster on startup.
1998    - Documentation fixes.
1999    
2000    ----------------------------------------------------------------------
2001    Name: Matthias Blume
2002    Date: 2000/11/02 17:00:00 JST
2003    Tag: blume-20001102-condcomp
2004    Description:
2005    
2006    - Small tweaks to pickler -- new BOOTFILES!
2007    - Version bumped to 110.29.2.
2008    - Added conditional compilation facility to init.cmi (see comment there).
2009    ----------------------------------------------------------------------
2010    Name: Allen Leung
2011    Date: 2000/10/23 19:31:00
2012    Tag: leunga-20001023-demo-ra
2013    
2014    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2015    2. Test programs for the graph library updated
2016    3. Some new MLRISC demo programs added
2017    
2018    ----------------------------------------------------------------------
2019    Name: Matthias Blume
2020    Date: 2000/08/31 22:15:00 JST
2021    Tag: blume-20001017-errmsg
2022    Description:
2023    
2024    More error message grief: Where there used to be no messages, there
2025    now were some that had bogus error regions.  Fixed.
2026    
2027    ----------------------------------------------------------------------
2028    Name: Matthias Blume
2029    Date: 2000/08/31 17:30:00 JST
2030    Tag: blume-20001017-v110p29p1
2031    Description:
2032    
2033    I made a version 110.29.1 with new bootfiles.
2034    
2035    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2036              CM documentation changes and a small bugfix in CM's error reporting.
2037    
2038    ----------------------------------------------------------------------
2039    Name: Lal George
2040    Date: 2000/09/27 14:42:35 EDT
2041    Tag: george-20000927-nodestatus
2042    Description:
2043    
2044    Changed the type of the nodestatus, so that:
2045    
2046            SPILLED(~1)             is now SPILLED
2047            SPILLED(m) where m>=0   is now MEMREG(m)
2048            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2049    
2050    ----------------------------------------------------------------------
2051    Name: Matthias Blume
2052    Date: 2000/09/07 14:45:00 JST
2053    Tag: blume-20000907-cmerrmsg
2054    Description:
2055    
2056    Small tweak to CM to avoid getting ML syntax error messages twice.
2057    
2058    ----------------------------------------------------------------------
2059    Name: Matthias Blume
2060    Date: 2000/08/31 18:00:00 JST
2061    Tag: blume-20000831-cvsbootfiles
2062    Description:
2063    
2064    New URL for boot files (because the 110.29 files on the BL server do
2065    now work correctly with my updated install scripts for yacc and lex).
2066    
2067    ----------------------------------------------------------------------
2068    Name: Matthias Blume
2069    Date: 2000/08/08 12:33:00 JST
2070    Tag: blume-20000808-manual
2071    Description:
2072    
2073    Tiny update to CM manual.
2074    
2075    ----------------------------------------------------------------------
2076    Name: Allen Leung
2077    Date: 2000/08/7 19:31:00
2078    Tag: leunga-20000807-a-whole-bunch-of-stuff
2079    
2080      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2081    and Mobdy.
2082    
2083    1.  x86
2084    
2085       a.  Fixes to peephole module by John and Dan.
2086       b.  Assembly fix to SETcc by Allen.
2087       c.  Fix to c-call by John.
2088       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2089       e.  Instruction selection optimization to SETcc as suggested by John.
2090    
2091           For example,
2092    
2093            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2094    
2095           should generate:
2096    
2097            MOVL a, x
2098            SUBL b, x
2099            SHRL 31, x
2100    
2101    2.  IR stuff
2102    
2103         A bunch of new DJ-graph related algorithms added.  These
2104         speed up SSA construction.
2105    
2106    3.  SSA + Scheduling
2107    
2108         Added code for SSA and scheduling to the repository
2109    
2110    ----------------------------------------------------------------------
2111    Name: Lal George
2112    Date: 2000/07/27 11:53:14 EDT
2113    
2114    Tag: lal-20000727-linux-ppc
2115    Description:
2116    
2117     Made changes to support Linux PPC.
2118     p.s. I have confirmation that the 110.29 boot files work fine.
2119    
2120    ----------------------------------------------------------------------
2121    Name: Matthias Blume
2122    Date: 2000/07/27 17:40:00 JST
2123    Tag: blume-20000727-scripts
2124    Description:
2125    
2126    !!!! WARNING !!!!
2127    You must recompile the runtime system!
2128    !!!! WARNING !!!!
2129    
2130    This is basically another round of script-enhancements:
2131    
2132    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2133       and undefine CM preprocessor symbols.
2134    
2135    2. ml-build avoids generating a new heap image if it finds that the
2136       existing one is still ok.  (The condition is that no ML file had to
2137       be recompiled and all ML files are found to be older that the heap
2138       file.)
2139    
2140       To make this work smoothly, I also hacked the runtime system as
2141       well as SMLofNJ.SysInfo to get access to the heap image suffix
2142       (.sparc-solaris, ...) that is currently being used.
2143    
2144       Moreover, the signature of CM.mk_standalone has changed.  See the
2145       CM manual.
2146    
2147    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2148       CM manual for details.)
2149    
2150    4. More CM manual updates:
2151        - all of the above has been documented.
2152        - there is now a section describing the (CM-related) command line
2153          arguments that are accepted by the "sml" command
2154    
2155    ----------------------------------------------------------------------
2156    Name: Matthias Blume
2157    Date: 2000/07/25 16:20:00 JST
2158    Tag: blume-20000725-makedepend
2159    Description:
2160    
2161    Added a script called ml-makedepend.  This can be used in makefiles
2162    for Unix' make in a way very similar to the "makedepend" command for
2163    C.
2164    
2165    The script internally uses function CM.sources.
2166    
2167    Synopsis:
2168    
2169        ml-makedepend [-f makefile] cmfile targetname
2170    
2171    The default for the makefile is "makefile" (or "Makefile" should
2172    "makefile" not exist).
2173    
2174    ml-makedepend adds a cmfile/targetname-specific section to this
2175    makefile (after removing the previous version of this section).  The
2176    section contains a single dependency specification with targetname on
2177    the LHS (targetname is an arbitrary name), and a list of files derived
2178    from the cmfile on the RHS.  Some of the files on the RHS are
2179    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2180    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2181    path names.  The makefile writer is responsible for making sure that
2182    these variables have correct at the time "make" is invoked.
2183    
2184    ----------------------------------------------------------------------
2185    Name: Matthias Blume
2186    Date: 2000/07/22 23:30:00 JST
2187    Tag: blume-20000722-urlupdate
2188    Description:
2189    
2190    Changed BOOT and config/srcarchiveurl to point to BL server:
2191    
2192        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2193    
2194    ----------------------------------------------------------------------
2195    Name: Matthias Blume
2196    Date: 2000/07/18 18:00:00 JST
2197    Tag: blume-20000718-Version_110_29
2198    Description:
2199    
2200    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2201    
2202    2. Updated config/version to 110.29
2203    
2204    3. Updated config/srcarchiveurl
2205    
2206    3. New boot files!
2207       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2208    
2209    ----------------------------------------------------------------------
2210    Name: Matthias Blume
2211    Date: 2000/07/11 13:58:00 JST
2212    Tag: blume-20000711-doctypo
2213    Description:
2214    
2215    Fixed a few typos in CM manual.
2216    
2217    ----------------------------------------------------------------------
2218    Name: Allen Leung
2219    Date: 2000/06/15 00:38:00
2220    Tag: leunga-20000704-sparc-x86
2221    
2222    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2223    2. fix to x86 RET bug [found by Dan Grossman]
2224    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2225    
2226       Affects c-- and moby only
2227    
2228    ----------------------------------------------------------------------
2229    Name: Matthias Blume
2230    Date: 2000/07/04 15:26:00
2231    Tag: blume-20000704-trigger
2232    Description:
2233    
2234    1. Improvements to CM manual.
2235    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2236       of getting a back-trace.  The function, when called, raises an
2237       internal exception which explicitly carries the full back-trace history,
2238       so it is unaffected by any intervening handle-raise pairs ("trivial"
2239       or not).  The interactive loop will print that history once it arrives
2240       at top level.
2241       Short of having all exceptions implicitly carry the full history, the
2242       recommended way of using this facility is:
2243         - compile your program with instrumentation "on"
2244         - run it, when it raises an exception, look at the history
2245         - if the history is "cut off" because of some handler, go and modify
2246           your program so that it explicitly calls BTrace.trigger
2247         - recompile (still instrumented), and rerun; look at the full history
2248    
2249    ----------------------------------------------------------------------
2250    Name: Matthias Blume
2251    Date: 2000/07/03 15:36:00 JST
2252    Tag: blume-20000702-manual
2253    Description:
2254    
2255    Small corrections and updates to CM manual.
2256    
2257    ----------------------------------------------------------------------
2258    Name: Matthias Blume
2259    Date: 2000/06/29 16:04:00 JST
2260    Tag: blume-20000629-yacctool
2261    Description:
2262    
2263    Changes:
2264    
2265    1. Class "mlyacc" now takes separate arguments to pass options to
2266       generated .sml- and .sig-files independently.
2267    2. Corresponding CM manual updates.
2268    3. BTrace module now also reports call sites.  (However, for loop clusters
2269       it only shows from where the cluster was entered.)  There are associated
2270       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2271    
2272    ----------------------------------------------------------------------
2273    Name: Matthias Blume
2274    Date: 2000/06/27 16:51:00 JST
2275    Tag: blume-20000627-noweb
2276    Description:
2277    
2278    Changes:
2279    
2280     1. Implemented "subdir" and "witness" options for noweb tool.
2281        This caused some slight internal changes in CM's tool implementation.
2282     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2283        some remaining issues from earlier path anchor changes.
2284     3. Updated CM manual accordingly.
2285    
2286     4. Changed implementation of back-tracing so that I now consider it
2287        ready for prime-time.
2288    
2289        In particular, you don't have to explicitly trigger the back-trace
2290        anymore.  Instead, if you are running BTrace-instrumented code and
2291        there is an uncaught exception (regardless of whether or not it was
2292        raised in instrumented code), the top-level evalloop will print
2293        the back-trace.
2294    
2295        Features:
2296    
2297          - Instrumented and uninstrumented code work together seemlessly.
2298            (Of course, uninstrumented code is never mentioned in actual
2299             back-traces.)
2300    
2301          - Asymptotic time- and space-complexity of instrumented code is
2302            equal to that of uninstrumented code.  (This means that
2303            tail-recursion is preserved by the instrumentation phase.)
2304    
2305          - Modules whose code has been instrumented in different sessions
2306            work together without problem.
2307    
2308          - There is no penalty whatsoever on uninstrumented code.
2309    
2310          - There is no penalty on "raise" expressions, even in
2311            instrumented code.
2312    
2313        A potential bug (or perhaps it is a feature, too):
2314    
2315          A back-trace reaches no further than the outermost instrumented
2316          non-trivial "raise".  Here, a "trivial" raise is one that is the
2317          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2318    
2319               <exp> handle e => raise e
2320    
2321          and even
2322    
2323               <exp> handle Foo => raise Bar
2324    
2325          and, of course, through
2326    
2327               <exp> handle Foo => ...
2328    
2329         if the exception was not Foo.
2330    
2331         Back-traces always reach right through any un-instrumented code
2332         including any of its "handle" expressions, trivial or not.
2333    
2334       To try this out, do the following:
2335    
2336         - Erase all existing binfiles for your program.
2337           (You may keep binfiles for those modules where you think you
2338            definitely don't need back-tracing.)
2339         - Turn on back-trace instrumentation:
2340              SMLofNJ.Internals.BTrace.mode (SOME true);
2341         - Recompile your program.  (I.e., run "CM.make" or "use".)
2342         - You may now turn instrumentation off again (if you want):
2343              SMLofNJ.Internals.BTrace.mode (SOME false);
2344         - Run your program as usual.  If it raises an exception that
2345           reaches the interactive toplevel, then a back-trace will
2346           automatically be printed.  After that, the toplevel loop
2347           will print the exception history as usual.
2348    
2349    ----------------------------------------------------------------------
2350    Name: Matthias Blume
2351    Date: 2000/06/26 09:56:46 JST
2352    Tag: blume-20000626-setup
2353    Description:
2354    
2355    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2356          ML code before and after compiling a file (e.g., to set compiler
2357          flags)
2358    
2359    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2360              - associated changes to btrace.sml (BTrace instrumentation pass)
2361              - cleaner implementation of btimp.sml (BTrace tracing and report
2362                module)
2363    
2364    CM manual: * new path encoding documented
2365               * description of setup-parameter to "sml" added
2366    
2367    The biggest user-visible change to back-tracing is that it is no
2368    longer necessary to compile all traced modules within the same
2369    session.  (This was a real limitation.)
2370    
2371    ----------------------------------------------------------------------
2372    Name: Matthias Blume
2373    Date: 2000/06/24 12:40:00 JST
2374    Tag: blume-20000624-startup
2375    Description:
2376    
2377    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2378    bit too often -- to put it mildly. :)
2379    
2380    ----------------------------------------------------------------------
2381    Name: Matthias Blume
2382    Date: 2000/06/23 18:20:00 JST
2383    Tag: blume-20000623-btrace
2384    Description:
2385    
2386    This updates adds a backtrace facility to aid programmers in debugging
2387    their programs.  This involves the following changes:
2388    
2389    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2390       keeping track of the current call stack.  When programs are compiled
2391       in a special mode, the compiler will insert calls to these hooks
2392       into the user program.
2393       "Hook" means that it is possible for different implementations of
2394       back-tracing to register themselves (at different times).
2395    
2396    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2397       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2398       It can be turned on using this call:
2399         SMLofNJ.Internals.BTrace.mode (SOME true);
2400       Turning it off again:
2401         SMLofNJ.Internals.BTrace.mode (SOME false);
2402       Querying the current status:
2403         SMLofNJ.Internals.BTrace.mode NONE;
2404       Annotated programs are about twice as big as normal ones, and they
2405       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2406       where all hooks do nothing).  The slowdown with a plugin that is
2407       actually useful (such as the one supplied by default) is even greater,
2408       but in the case of the default plugin it is still only an constant
2409       factor (amortized).
2410    
2411    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2412       with a sub-structure BTrace for controlling back-tracing.  In particular,
2413       the above-mentioned function "mode" controls whether the annotation
2414       phase is invoked by the compiler.  Another important function is
2415       "trigger": when called it aborts the current execution and causes
2416       the top-level loop to print a full back-trace.
2417    
2418    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2419       for back-tracing.  It keeps track of the dynamic call stack and in
2420       addition to that it keeps a partial history at each "level" of that
2421       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2422       d and b (at separate times, dynamically), then the report will show:
2423    
2424       GOTO   d
2425             /c
2426       GOTO  \b
2427       CALL   a
2428    
2429       This shows that there was an initial non-tail call of a, then a
2430       tail-call to b or c, looping behavior in a cluster of functions that
2431       consist of b and c, and then a goto from that cluster (i.e., either from
2432       b or from c) to d.
2433    
2434       Note that (depending on the user program) the amount of information
2435       that the back-trace module has to keep track of at each level is bounded
2436       by a constant.  Thus, the whole implementation has the same asymptotical
2437       complexity as the original program (both in space and in time).
2438    
2439    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2440       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2441       which is raised by the "trigger" function mentioned above.
2442    
2443    Notes on usage:
2444    
2445    - Annotated code works well together with unannotated code:
2446    Unannotated calls simply do not show up at all in the backtrace.
2447    
2448    - It is not a good idea to let modules that were annotated during
2449    different sessions run at the same time.  This is because the compiler
2450    chooses small integers to identify individual functions, and there
2451    will be clashes if different modules were compiled in separate sessions.
2452    (Nothing will crash, and you will even be told about the clashes, but
2453    back-trace information will in general not be useful.)
2454    
2455    - Back-tracing can be confused by callcc and capture.
2456    
2457    - The only way of getting a back-trace right now is to explicitly
2458    invoke the "trigger" function from your user program.  Eventually, we
2459    should make every exception carry back-trace information (if
2460    available).  But since this creates more overhead at "raise"-time
2461    (similar to the current exnHistory overhead), I have not yet
2462    implemented this.  (The implementation will be rather easy.)  With
2463    exceptions carrying back-trace information, this facility will be even
2464    more useful because users don't need to modify their programs...
2465    
2466    - While it is possible to compile the compiler with back-trace
2467    annotations turned on (I did it to get some confidence in
2468    correctness), you must make absolutely sure that core.sml and
2469    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2470    be compiled with annotation because there is no core access yet, but
2471    if you compile btimp.sml with annotation, then the system will go into
2472    an infinite recursion and crash.)
2473    Since CM currently does not know about BTrace, the only way to turn
2474    annotations on and off for different modules of the compiler is to
2475    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2476    this is awkward and clumsy.
2477    
2478    Sample sessions:
2479    
2480    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2481    - SMLofNJ.Internals.BTrace.mode (SOME true);
2482    [autoloading]
2483    [autoloading done]
2484    val it = false : bool
2485    - structure X = struct
2486    -     fun main n = let
2487    -         fun a (x, 0) = d x
2488    -           | a (x, n) = b (x, n - 1)
2489    -         and b (x, n) = c (x, n)
2490    -         and c (x, n) = a (x, n)
2491    -         and d x = e (x, 3)
2492    -         and e (x, 0) = f x
2493    -           | e (x, n) = e (x, n - 1)
2494    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2495    -           | f n = n * g (n - 1)
2496    -         and g n = a (n, 3)
2497    -     in
2498    -         f n
2499    -     end
2500    - end;
2501    structure X : sig val main : int -> int end
2502    - X.main 3;
2503    *** BACK-TRACE ***
2504    GOTO   stdIn:4.2-13.20: X.main[2].f
2505    GOTO-( stdIn:4.2-13.20: X.main[2].e
2506    GOTO   stdIn:4.2-13.20: X.main[2].d
2507         / stdIn:4.2-13.20: X.main[2].a
2508         | stdIn:4.2-13.20: X.main[2].b
2509    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2510    CALL   stdIn:4.2-13.20: X.main[2].g
2511    GOTO   stdIn:4.2-13.20: X.main[2].f
2512    GOTO-( stdIn:4.2-13.20: X.main[2].e
2513    GOTO   stdIn:4.2-13.20: X.main[2].d
2514         / stdIn:4.2-13.20: X.main[2].a
2515         | stdIn:4.2-13.20: X.main[2].b
2516    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2517    CALL   stdIn:4.2-13.20: X.main[2].g
2518    GOTO   stdIn:4.2-13.20: X.main[2].f
2519    GOTO-( stdIn:4.2-13.20: X.main[2].e
2520    GOTO   stdIn:4.2-13.20: X.main[2].d
2521         / stdIn:4.2-13.20: X.main[2].a
2522         | stdIn:4.2-13.20: X.main[2].b
2523    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2524    CALL   stdIn:4.2-13.20: X.main[2].g
2525    GOTO   stdIn:4.2-13.20: X.main[2].f
2526    CALL   stdIn:2.15-17.4: X.main[2]
2527    -
2528    
2529    (Note that because of a FLINt bug the above code currently does not
2530    compile without BTrace turned on.)
2531    
2532    Here is another example, using my modified Tiger compiler:
2533    
2534    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2535    - SMLofNJ.Internals.BTrace.mode (SOME true);
2536    [autoloading]
2537    [autoloading done]
2538    val it = false : bool
2539    - CM.make "sources.cm";
2540    [autoloading]
2541    ...
2542    [autoloading done]
2543    [scanning sources.cm]
2544    [parsing (sources.cm):parse.sml]
2545    [creating directory CM/SKEL ...]
2546    [parsing (sources.cm):tiger.lex.sml]
2547    ...
2548    [wrote CM/sparc-unix/semant.sml]
2549    [compiling (sources.cm):main.sml]
2550    [wrote CM/sparc-unix/main.sml]
2551    [New bindings added.]
2552    val it = true : bool
2553    - Main.compile ("../testcases/merge.tig", "foo.out");
2554    *** BACK-TRACE ***
2555    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2556    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2557    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2558    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2559    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2560    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2561    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2562         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2563    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2564    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2565    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2566    CALL   main.sml:1.18-118.4: Main.compile[2]
2567    -
2568    
2569    ----------------------------------------------------------------------
2570    Name: Matthias Blumen
2571    Date: 2000/06/21 18:00:00 JST
2572    Tag: blume-20000621-manual
2573    Description:
2574    
2575    CM manual update: Path environments documented.
2576    
2577    ----------------------------------------------------------------------
2578    Name: Matthias Blume
2579    Date: 2000/06/19 13:40:00
2580    Tag: blume-20000619-manual
2581    Description:
2582    
2583    CM manual and system/README update.  This only covers the fact that
2584    there are no more implicit anchors.  (Path environments and the "bind"
2585    option to "cm" have yet to be documented.)
2586    
2587    ----------------------------------------------------------------------
2588    Name: Matthias Blume
2589    Date: 2000/06/19 11:05:00 JST
2590    Tag: blume-20000619-chdir-bugfix
2591    Description:
2592    
2593    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2594    
2595    ----------------------------------------------------------------------
2596    Name: Matthias Blume
2597    Date: 2000/06/18 22:00:10 JST
2598    Tag: blume-20000618-implicit-anchors-really-gone
2599    Description:
2600    
2601    I updates the previous HISTORY entry where I forgot to mention that
2602    implicit anchors are no longer with us.
2603    
2604    The current update also gets rid of the (now useless) controller
2605    CM.Control.implicit_anchors.
2606    
2607    ----------------------------------------------------------------------
2608    Name: Matthias Blume
2609    Date: 2000/06/16 17:30:00 JST
2610    Tag: blume-20000616-anchorenv
2611    Description:
2612    
2613    This patch implements the long anticipated (just kidding :) "anchor
2614    environment" mechanism.  In the course of doing this, I also
2615    re-implemented CM's internal "SrcPath" module from scratch.  The new
2616    one should be more robust in certain boundary cases.  In any case, it
2617    is a lot cleaner than its predecessor (IMHO).
2618    
2619    This time, although there is yet another boot file format change, I
2620    kept the unpickler backward-compatible.  As a result, no new bootfiles
2621    are necessary and bootstrapping is straightforward.  (You cannot read
2622    new bootfiles into an old system, but the other way around is no
2623    problem.)
2624    
2625    Visible changes:
2626    
2627    ** 0. Implicit path anchors (without the leading $-symbol) are no
2628    longer recognized at all. This means that such path names are not
2629    illegal either.  For example, the name basis.cm simply refers to a
2630    local file called "basis.cm" (i.e, the name is an ordinary path
2631    relative to .cm-files directory).  Or, to put it differently, only
2632    names that start with $ are anchored paths.
2633    
2634    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2635    vanished.
2636    
2637    John (Reppy) had critizised this as soon as I originally proposed and
2638    implemented it, but at that time I did not really deeply believe
2639    him. :) Now I came full-circle because I need the $<singlearc> syntax
2640    in another place where it cannot be seen as an abbreviation for
2641    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2642    seems to mean (i.e., it "expands" into the corresponding anchor
2643    value).
2644    
2645    However, when paths are used as members in CM description files, it
2646    continues to be true that there must be at least another arc after the
2647    anchor.  This is now enforced separately during semantic analysis
2648    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2649    
2650    ** 2. The "cm" class now accepts an option "bind".  The option's value
2651    is a sub-option list of precisely two items -- one labeled "anchor"
2652    and the other one labeled "value".  As you might expect, "anchor" is
2653    used to specify an anchor name to be bound, and "value" specifies what
2654    the anchor is being bound to.
2655    
2656    The value must be a directory name and can be given in either standard
2657    syntax (including the possibility that it is itself an anchored path)
2658    or native syntax.
2659    
2660    Examples:
2661    
2662       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2663       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2664    
2665    and so on.
2666    
2667    The meaning of this is that the .cm-file will be processed with an
2668    augmented anchor environment where the given anchor(s) is/are bound to
2669    the given values(s).
2670    
2671    The rationale for having this feature is this: Suppose you are trying
2672    to use two different (already stable) libraries a.cm and b.cm (that
2673    you perhaps didn't write yourself).  Further, suppose each of these
2674    two libraries internally uses its own auxiliary library $aux/lib.cm.
2675    Normally you would now have a problem because the anchor "lib" can not
2676    be bound to more than one value globally.  Therefore, the project that
2677    uses both a.cm and b.cm must locally redirect the anchor to some other
2678    place:
2679    
2680       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2681       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2682    
2683    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2684    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2685    
2686    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2687    you when you do so at the time of CM.stabilize).  Therefore, you can
2688    also use an anchored path as the value:
2689    
2690      a.cm (bind:(anchor:lib value:$a-lib))
2691      b.cm (bind:(anchor:lib value:$b-lib))
2692    
2693    Now you can globally configure (using the usual CM.Anchor.anchor or
2694    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2695    itself is always locally bound, setting it globally is no longer
2696    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2697    can still be used as a global anchor for separate purposes.  As a
2698    matter of fact, one can locally define "lib" in terms of a global
2699    "lib":
2700    
2701      a.cm (bind:(anchor:lib value:$lib/a))
2702      b.cm (bind:(anchor:lib value:$lib/b))
2703    
2704    ** 3: The encoding of path names has changed.  This affects the way
2705    path names are shown in CM's progress report and also the internal
2706    protocol encoding used for parallel make.
2707    
2708    The encoding now uses one or more ':'-separated segments.  Each
2709    segments corresponds to a file that has been specified relative to the
2710    file given by its preceding segment.  The first segment is either
2711    relative to the CWD, absolute, or anchored.  Each segment itself is
2712    basically a Unix pathname; all segments but the first are relative.
2713    
2714    Example:
2715    
2716       $foo/bar/baz.cm:a/b/c.sml
2717    
2718    This path denotes the file bar/a/b/c.sml relative to the directory
2719    denoted by anchor "foo".  Notice that the encoding also includes
2720    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2721    paths are resolved relative to the .cm-files directory, so baz.cm must
2722    be ignored to get the "real" pathname.
2723    
2724    To make this fact more obvious, CM puts the names of such "virtual
2725    arcs" into parentheses when they appear in progress reports. (No
2726    parentheses will appear in the internal protocol encoding.)  Thus,
2727    what you really see is:
2728    
2729      $foo/bar/(baz.cm):a/b/c.sml
2730    
2731    I find this notation to be much more informative than before.
2732    
2733    Another new feature of the encoding is that special characters
2734    including parentheses, colons, (back)slashes, and white space are
2735    written as \ddd (where ddd is the decimal encoding of the character).
2736    
2737    *** The CM manual still needs to be updated.
2738    
2739    ----------------------------------------------------------------------
2740    Name: Allen Leung
2741    Date: 2000/06/15 00:38:00
2742    Tag: leunga-20000615-x86-peephole
2743    
2744    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2745    
2746    ----------------------------------------------------------------------
2747    Name: Matthias Blume
2748    Date: 2000/06/12 11:40:00
2749    Tag: blume-20000612-parmakefix
2750    Description:
2751    
2752    More cleanup after changing the file naming scheme: This time I
2753    repaired the parallel make mechanism for CMB.make which I broke earlier.
2754    
2755    ----------------------------------------------------------------------
2756    Name: Allen Leung
2757    Date: 2000/06/09 01:25:00
2758    Tag: leunga-20000609-various
2759    
2760    None of these things should affect normal SML/NJ operations
2761    
2762    1. Peephole improvements provided by Fermin (c--)
2763    2. New annotation DEFUSE for adding extra dependence (moby)
2764    3. New X86 LOCK instructions (moby)
2765    4. New machine description language for reservation tables (scheduling)
2766    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2767       trees etc.)
2768    6. I've changed the CM files so that they can work with versions
2769       110.0.6, 110.25 and 110.28
2770    
2771    ----------------------------------------------------------------------
2772    Name: Matthias Blume
2773    Date: 2000/06/09 12:40:00
2774    Tag: blume-20000609-log
2775    Description:
2776    
2777    - Removed all(?) remaining RCS Log entries from sources.
2778    
2779    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2780      anchored paths).
2781    
2782    ----------------------------------------------------------------------
2783    Name: Matthias Blume
2784    Date: 2000/06/07 17:00:00 JST
2785    Tag: blume-20000607-no-implicit-anchors
2786    Description:
2787    
2788    1. This update changes the default setting for
2789    CM.Control.implicit_anchors from true to false.  This means that
2790    implicit anchors are no longer permitted by default.  I also tried to
2791    make sure that nothing else still relies on implicit anchors.
2792    (This is the next step on the schedule towards a CM that does not even
2793    have the notion of implicit anchors anymore.)
2794    
2795    2. More CM manual updates.
2796    
2797    3. I managed to track down and fix the pickling bug I mentioned last
2798    time.  Because of the previously existing workaround, this entails no
2799    immediate practical changes.
2800    
2801    ----------------------------------------------------------------------
2802    Name: Matthias Blume
2803    Date: 2000/06/06 11:15:00 JST
2804    Tag: blume-20000606-lazierpickle
2805    Description:
2806    
2807    !!!! NEW BOOT FILES !!!!
2808    
2809    * The main purpose of this update is to make library pickles lazier in
2810    order to reduce the initial space penalty for autoloading a library.
2811    As a result, it is now possible to have $smlnj/compiler.cm
2812    pre-registered.  This should take care of the many complaints or
2813    inquiries about missing structure Compiler.  This required changes to
2814    CM's internal data structures and small tweaks to some algorithms.
2815    
2816    As a neat additional effect, it is no longer necessary (for the sake
2817    of lean heap image files) to distinguish between a "minimal" CM and a
2818    "full" CM.  Now, there is only one CM (i.e., the "full" version:
2819    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2820    interactive top level. ($smlnj/cm/minimal.cm is gone.)
2821    
2822    To make the life of compiler-hackers easier, "makeml" now also
2823    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
2824    words, after you bootstrap a new sml for the first time, you will not
2825    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
2826    around you will still have to do it, though.)
2827    
2828    * A second change consists of major updates to the CM manual.  There
2829    are now several appendices with summary information and also a full
2830    specification of the CM description file syntax.
2831    
2832    * In directory src/system I added the script "allcross".  This script
2833    invokes sml and cross-compiles the compiler for all supported
2834    architectures.  (Useful when providing a new set of boot files.)
2835    
2836    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
2837    added a small tweak to pickle-util.sml to work around this problem,
2838    but it is not a proper fix yet.  I will investigate further.  (The
2839    effect of the bug was an inflation of library pickle size.)
2840    
2841    * Version number increased to 110.28.1 (to avoid compatibility problems).
2842    
2843    ----------------------------------------------------------------------
2844    Name: Allen Leung
2845    Date: 2000/05/25 17:28 EDT
2846    Tag: leunga-20000525-ra
2847    Description:
2848    
2849      Fixed a bug in freezing phase of the register allocator.
2850    
2851    ----------------------------------------------------------------------
2852    Name: Allen Leung
2853    Date: 2000/05/15 22:53 EDT
2854    Tag: leunga-20000515-alpha-x86-ra
2855    Description:
2856    
2857      1. Alpha
2858    
2859          Slight cleanup.  Removed the instruction SGNXL
2860    
2861      2. X86
2862    
2863          Added the following instructions to the instruction set:
2864    
2865            ROLx, RORx,
2866            BTx, BTSx, BTLx, BTRx,
2867            XCHGx, and variants with the LOCK prefix
2868    
2869      3. Register Allocation
2870    
2871          The module ra-rewrite-with-renaming has been improved.
2872    
2873      These have no effect on SML/NJ.
2874    
2875    ----------------------------------------------------------------------
2876    Name: Matthias Blume
2877    Date: 2000/05/15 16:20:00 JST
2878    Tag: blume-20000515-lightrebuild
2879    Description:
2880    
2881    1. I added an alternative to "-rebuild" to "makeml".  The difference is
2882       that prior to calling CMB.make' the CM-variable "LIGHT" will be
2883       defined.  In effect, the command will not build any cross-compiler
2884       backends and therefore finish more quickly.
2885    
2886       The "fixpt" script also takes a "-light" switch to be able to use
2887       this new facility while compiling for a fixpoint.
2888    
2889    2. I replaced all mentions of anchored paths in group owner specifications
2890       with simple relative paths (usually starting with "..").
2891       The rationale is that a library's internal workings should not be
2892       compromised by the lack of some anchor.  (An anchor is necessary
2893       for someone who wants to refer to the library by an anchored path,
2894       but it should not be necessary to build the same library in the first
2895       place.)
2896    
2897    3. I changed the way CM's tool mechanism determines the shell command
2898       string used for things like ml-yacc etc. so that it does not break
2899       when CM.Control.implicit_anchors is turned off.
2900    
2901    ----------------------------------------------------------------------
2902    Name: Matthias Blume
2903    Date: 2000/05/12 18:20:00 JST
2904    Tag: blume-20000512-ml-build
2905    Description:
2906    
2907    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
2908    getting installed properly (by config/install.sh).
2909    
2910  ----------------------------------------------------------------------  ----------------------------------------------------------------------
2911  Name: Matthias Blume  Name: Matthias Blume
2912  Date: 2000/05/12 17:30:00 JST  Date: 2000/05/12 17:30:00 JST
# Line 435  Line 3331 
3331    
3332  3.  Assembly  3.  Assembly
3333    
3334      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
3335      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
3336      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
3337    
# Line 458  Line 3354 
3354    
3355  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
3356  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
3357  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
3358  legal surface-syntax symbol).  legal surface-syntax symbol).
3359    
3360  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 468  Line 3364 
3364  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
3365    
3366  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3367  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
3368  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
3369  more details.  more details.
3370    
# Line 583  Line 3479 
3479     (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
3480     used).     used).
3481    
3482     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3483     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3484     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3485    
3486     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 596  Line 3492 
3492    
3493     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3494    
3495     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3496     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3497    
3498  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 627  Line 3523 
3523       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3524       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3525       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
3526       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3527       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3528       Dave's hands. :)       Dave's hands. :)
3529    
# Line 730  Line 3626 
3626    
3627       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3628       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3629       testl is perferable to andl.       testl is preferable to andl.
3630    
3631  7. RA (x86 only)  7. RA (x86 only)
3632    
# Line 912  Line 3808 
3808    
3809  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3810  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3811  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
3812  explanation.  explanation.
3813    
3814  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3815  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3816  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3817  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 959  Line 3855 
3855  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
3856  <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,
3857  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
3858  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3859  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3860  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3861    
# Line 1009  Line 3905 
3905    it from that remote directory.    it from that remote directory.
3906    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3907    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3908    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3909    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3910    
3911    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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