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Diff of /sml/trunk/HISTORY

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revision 647, Tue May 16 02:53:02 2000 UTC revision 1009, Wed Jan 9 19:44:22 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    Name: Lal George
16    Date: 2001/01/09 14:31:35 EST 2002
17    Tag: george-20011206-rm-native-copy
18    Description:
19    
20            Removed the native COPY and FCOPY instructions
21            from all the architectures and replaced it with the
22            explicit COPY instruction from the previous commit.
23    
24            It is now possible to simplify many of the optimizations
25            modules that manipulate copies. This has not been
26            done in this change.
27    
28    ----------------------------------------------------------------------
29    Name: Lal George
30    Date: 2001/12/06 16:50:13 EST 2001
31    Tag: george-20011206-mlrisc-instruction
32    Description:
33    
34    Changed the representation of instructions from being fully abstract
35    to being partially concrete. That is to say:
36    
37      from
38            type instruction
39    
40      to
41            type instr                              (* machine instruction *)
42    
43            datatype instruction =
44                LIVE of {regs: C.cellset, spilled: C.cellset}
45              | KILL of {regs: C.cellset, spilled: C.cellset}
46              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
47              | ANNOTATION of {i: instruction, a: Annotations.annotation}
48              | INSTR of instr
49    
50    This makes the handling of certain special instructions that appear on
51    all architectures easier and uniform.
52    
53    LIVE and KILL say that a list of registers are live or killed at the
54    program point where they appear. No spill code is generated when an
55    element of the 'regs' field is spilled, but the register is moved to
56    the 'spilled' (which is present, more for debugging than anything else).
57    
58    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
59    We used to generate:
60    
61            DEFFREG f1
62            f1 := f2 + f3
63            trapb
64    
65    but now generate:
66    
67            f1 := f2 + f3
68            trapb
69            LIVE {regs=[f1,f2,f3], spilled=[]}
70    
71    Furthermore, the DEFFREG (hack) required that all floating point instruction
72    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
73    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
74    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
75    this architecture).
76    
77    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
78    all the architectures. This will result in further simplification of the
79    register allocator that must be aware of them for coalescing purposes, and
80    will also simplify certain aspects of the machine description that provides
81    callbacks related to parallel copies.
82    
83    ANNOTATION should be obvious, and now INSTR represents the honest to God
84    machine instruction set!
85    
86    The <arch>/instructions/<arch>Instr.sml files define certain utility
87    functions for making porting easier -- essentially converting upper case
88    to lower case. All machine instructions (of type instr) are in upper case,
89    and the lower case form generates an MLRISC instruction. For example on
90    the alpha we have:
91    
92      datatype instr =
93         LDA of {r:cell, b:cell, d:operand}
94       | ...
95    
96      val lda : {r:cell, b:cell, d:operand} -> instruction
97        ...
98    
99    where lda is just (INSTR o LDA), etc.
100    
101    ----------------------------------------------------------------------
102    Name: Matthias Blume
103    Date: 2001/11/22 21:40:00 EST
104    Tag: Release_110_37
105    Description:
106    
107    Release 110.37.  This time for real.
108    
109    ----------------------------------------------------------------------
110    Name: Matthias Blume
111    Date: 2001/11/21 16:35:00 EST
112    Tag: blume-20011121-foot-in-mouth
113    Description:
114    
115    Removed the "Release_110_37" tag because of a serious bug.
116    This will be re-tagged once the bug is fixed.
117    
118    ----------------------------------------------------------------------
119    Name: Matthias Blume
120    Date: 2001/11/21 16:14:00 EST
121    Tag: blume-20011121-forgottenfile
122    Description:
123    
124    Forgot to add a file.  (Just a .tex-file -- part of
125    the CM manual source.)
126    
127    ----------------------------------------------------------------------
128    Name: Matthias Blume
129    Date: 2001/11/21 16:10:00 EST
130    Tag: blume-20011121-invalid_110_37
131    Description:
132    
133    Note: I removed the original tag "Release_110_37" from this commit
134          because we found a serious bug in all non-x86 backends.
135          - Matthias
136    
137    1. Modifications to the SML/NJ code generator and to the runtime system
138       so that code object name strings are directly inserted into code
139       objects at code generation time.  The only business the runtime system
140       has with this is now to read the name strings on occasions.
141       (The encoding of the name string has also changed somewhat.)
142    
143    2. CM now implements a simple "set calculus" for specifying export lists.
144       In particular, it is now possible to refer to the export lists of
145       other libraries/groups/sources and form unions as well as differences.
146       See the latest CM manual for details.
147    
148    3. An separate notion of "proxy" libraries has again be eliminated from
149       CM's model.  (Proxy libraries are now simply a special case of using
150       the export list calculus.)
151    
152    4. Some of the existing libraries now take advantage of the new set
153       calculus.
154       (Notice that not all libraries have been converted because some
155       of the existing .cm-files are supposed to be backward compatible
156       with 110.0.x.)
157    
158    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
159       "General.exnMessage"!  The former relies on a certain hook to be
160       initialized, and that often does not happen in the stand-alone case.)
161    
162    ----------------------------------------------------------------------
163    Name: Lal George
164    Date: 2001/11/21  13:56:18 EST
165    Tag: george-2001121-pseudo-ops
166    Description:
167    
168      Implemented a complete redesign of MLRISC pseudo-ops. Now there
169      ought to never be any question of incompatabilities with
170      pseudo-op syntax expected by host assemblers.
171    
172      For now, only modules supporting GAS syntax are implemented
173      but more should follow, such as MASM, and vendor assembler
174      syntax, e.g. IBM as, Sun as, etc.
175    
176    ----------------------------------------------------------------------
177    Name: Matthias Blume
178    Date: 2001/11/14 11:52:00 EST
179    Tag: blume-20011114-srcname
180    Description:
181    
182    1. Routed the name of the current source file to mlriscgen where it
183       should be directly emitted into the code object.  (This last part
184       is yet to be done.)
185    
186    2. Some cleanup of the pgraph code to make it match the proposal that
187       I put out the other day.  (The proposal notwithstanding, things are
188       still in flux here.)
189    
190    ----------------------------------------------------------------------
191    Name: Lal George
192    Date: 2001/11/14 09:44:04 EST
193    Tag:
194    Description:
195    
196      Fix for a backpatching bug reported by Allen.
197    
198      Because the boundary between short and long span-dependent
199      instructions is +/- 128, there are an astounding number of
200      span-dependent instructions whose size is over estimated.
201    
202      Allen came up with the idea of letting the size of span
203      dependent instructions be non-monotonic, for a maxIter
204      number of times, after which the size must be monotonically
205      increasing.
206    
207      This table shows the number of span-dependent instructions
208      whose size was over-estimated as a function of maxIter, for the
209      file Parse/parse/ml.grm.sml:
210    
211         maxIter            # of instructions:
212            10                      687
213            20                      438
214            30                      198
215            40                        0
216    
217      In compiling the compiler, there is no significant difference in
218      compilation speed between maxIter=10 and maxIter=40. Actually,
219      my measurements showed that maxIter=40 was a tad faster than
220      maxIter=10! Also 96% of the  files in the compiler reach a fix
221      point within 13 iterations, so fixing maxIter at 40, while high,
222      is okay.
223    
224    ----------------------------------------------------------------------
225    Name: Matthias Blume
226    Date: 2001/10/31 15:25:00 EST
227    Tag: blume-20011031-pgraph
228    Description:
229    
230    CKIT:
231    * Changed the "Function" constructor of type Ast.ctype to carry optional
232      argument identifiers.
233    * Changed the return type of TypeUtil.getFunction accordingly.
234    * Type equality ignores the argument names.
235    * TypeUtil.composite tries to preserve argument names but gives up quickly
236      if there is a mismatch.
237    
238    installation script:
239    * attempts to use "curl" if available (unless "wget" is available as well)
240    
241    CM:
242    * has an experimental implementation of "portable graphs" which I will
243      soon propose as an implementation-independent library format
244    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
245    
246    NLFFI-LIB:
247    * some cleanup (all cosmetic)
248    
249    NLFFIGEN:
250    * temporarily disabled the mechanism that suppresses ML output for
251      C definitions whose identifiers start with an underscore character
252    * generate val bindings for enum constants
253    * user can request that only one style (light or heavy) is being used;
254      default is to use both (command-line arguments: -heavy and -light)
255    * fixed bug in handling of function types involving incomplete pointers
256    * generate ML entry points that take record arguments (i.e., using
257      named arguments) for C functions that have a prototype with named
258      arguments
259      (see changes to CKIT)
260    
261    ----------------------------------------------------------------------
262    Name: Allen Leung
263    Date: 2001/10/27 20:34:00 EDT
264    Tag: leunga-20011027-x86-fast-fp-call
265    Description:
266    
267       Fixed the bug described in blume-20010920-slowfp.
268    
269       The fix involves
270          1. generating FCOPYs in FSTP in ia32-svid
271          2. marking a CALL with the appropriate annotation
272    
273    ----------------------------------------------------------------------
274    Name: Matthias Blume
275    Date: 2001/10/16 11:32:00 EDT
276    Tag: blume-20011016-netbsd
277    Description:
278    
279    Underscore patch from Chris Richards (fixing problem with compiling
280    runtime system under recent NetBSD).
281    
282    ----------------------------------------------------------------------
283    Name: Allen Leung
284    Date: 2001/10/12 17:18:32 EDT 2001
285    Tag: leung-20011012-x86-printflowgraph
286    Description:
287    
288    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
289    
290    ----------------------------------------------------------------------
291    Name: Lal George
292    Date: 2001/10/11 23:51:34 EDT
293    Tag: george-20011011-too-many-instrs
294    Description:
295    
296    The representation of a program point never expected to see more
297    than 65536 instructions in a basic block!
298    
299    ----------------------------------------------------------------------
300    Name: Lal George
301    Date: 2001/10/09 09:41:37 EDT
302    Tag: george-20011008-mlrisc-labels
303    Description:
304    
305    Changed the machine description files to support printing of
306    local and global labels in assembly code, based on host assembler
307    conventions.
308    
309    ----------------------------------------------------------------------
310    Name: Matthias Blume
311    Date: 2001/09/25 15:25:00 EDT
312    Tag: blume-20010925-exninfo
313    Description:
314    
315    I provided a non-hook implementation of exnName (at the toplevel) and
316    made the "dummy" implementation of exnMessage (at the toplevel) more
317    useful: if nothing gets "hooked in", then at least you are going to
318    see the exception name and a message indicating why you don't see more.
319    
320    [For the time being, programs that need exnMessage and want to use
321    ml-build should either use General.exnMessage (strongly recommended) or
322    refer to structure General at some other point so that CM sees a
323    static dependency.]
324    
325    [Similar remarks go for "print" and "use":  If you want to use their
326    functionality in stand-alone programs generated by ml-build, then use
327    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
328    
329    ----------------------------------------------------------------------
330    Name: Matthias Blume
331    Date: 2001/09/20 17:28:00 EDT
332    Tag: blume-20010920-slowfp
333    Description:
334    
335    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
336    
337    ----------------------------------------------------------------------
338    Name: Matthias Blume
339    Date: 2001/09/20 17:20:00 EDT
340    Tag: blume-20010920-canonicalpaths
341    Description:
342    
343    0. Updated the BOOT file (something that I forgot to do earlier).
344    
345    1. Small internal change to CM so that it avoids "/../" in filenames
346       as much as possible (but only where it is safe).
347    
348    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
349       that arguments that contain delimiters are passed through correctly.
350       This change also means that all "special" arguments of the form
351       @SMLxxx... must come first.
352    
353    3. Changed install script to put relative anchor names for tool commands
354       into pathconfig.
355    
356    ----------------------------------------------------------------------
357    Name: Matthias Blume
358    >>>>>>> 1.169
359    Date: 2001/09/18 15:35:00 EDT
360    Tag: blume-20010918-readme11036
361    Description:
362    
363    Added README files.
364    
365    ----------------------------------------------------------------------
366    Name: Matthias Blume
367    Date: 2001/09/18 11:45:00 EDT
368    Tag: Release_110_36 (retag)
369    Description:
370    
371    Fixed mistake in config/preloads. Retagged as 110.36.
372    
373    ----------------------------------------------------------------------
374    Name: Matthias Blume
375    Date: 2001/09/18 09:40:00 EDT
376    Tag: Release_110_36_orig (tag changed)
377    Description:
378    
379    New version (110.36).  New bootfiles.
380    
381    ----------------------------------------------------------------------
382    Name: Matthias Blume
383    Date: 2001/09/14 16:15:00 EDT
384    Tag: blume-20010914-x86fastfp
385    Description:
386    
387    John committed some changes that Allen made, in particular a (hopefully)
388    correctly working version of the x86-fp module.
389    
390    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
391    flag to "true".  Everything seems to compile to a fixpoint ok, and
392    "mandelbrot" speeds up by about 15%.
393    
394    ----------------------------------------------------------------------
395    Name: Matthias Blume
396    Date: 2001/09/13 11:20:00 EDT
397    Tag: blume-20010913-minimal
398    Description:
399    
400    1. Stefan Monnier's patch to fix a miscompilation problem that
401       was brought to light by John Reppy's work on Moby.
402    
403    2. Implemented a minimal "structure Compiler" that contains just
404       "version" and "architecture".  The minimal version will be
405       available when the full version is not.  This is for backward-
406       compatibility with code that wants to test Compiler.version.
407    
408    ----------------------------------------------------------------------
409    Name: Matthias Blume
410    Date: 2001/08/28 14:03:00 EDT
411    Tag: blume-20010828-ml-lex
412    Description:
413    
414    Fix for bug 1581, received from Neophytos Michael.
415    
416    ----------------------------------------------------------------------
417    Name: Matthias Blume
418    Date: 2001/08/27 11:20:00 EDT
419    Tag: blume-20010827-readme11035
420    Description:
421    
422    Fleshed out the README file for 110.35.
423    
424    ----------------------------------------------------------------------
425    Name: Matthias Blume
426    Date: 2001/08/24 17:10:00 EDT
427    Tag: Release_110_35
428    Description:
429    
430    New version number (110.35).  New bootfiles.
431    
432    ----------------------------------------------------------------------
433    Name: Lal George
434    Date: 2001/08/24 13:47:18 EDT 2001
435    Tag: george-20010824-MLRISC-graphs
436    Description:
437    
438     removed clusters from MLRISC completely and replaced with graphs.
439    
440    ----------------------------------------------------------------------
441    Name: Matthias Blume
442    Date: 2001/08/23 17:50:00 EDT
443    Tag: blume-20010823-toplevel
444    Description:
445    
446    - some reorganization of the code that implements various kinds of
447      environments in the compiler (static, dynamic, symbolic, combined)
448    - re-implemented the EnvRef module so that evalStream works properly
449      (if the stream contains references to "use", "CM.make", etc.)
450    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
451    
452    ----------------------------------------------------------------------
453    Name: Matthias Blume
454    Date: 2001/08/20 15:50 EDT
455    Tag: blume20010820-slipup
456    Description:
457    
458    I forgot to commit a few files.  Here they are...
459    
460    ----------------------------------------------------------------------
461    Name: Matthias Blume
462    Date: 2001/08/20 15:35:00 EDT
463    Tag: blume-20010820-debugprof
464    Description:
465    
466    !!!! NEW BOOTFILES !!!!
467    
468    This is another round of reorganizing the compiler sources.  This
469    time the main goal was to factor out all the "instrumentation"
470    passes (for profiling and backtracing) into their own library.
471    The difficulty was to do it in such a way that it does not depend
472    on elaborate.cm but only on elabdata.cm.
473    
474    Therefore there have been further changes to both elaborate.cm and
475    elabdata.cm -- more "generic" things have been moved from the former
476    to the latter.  As a result, I was forced to split the assignment
477    of numbers indicating "primtyc"s into two portions: SML-generic and
478    SML/NJ-specific.  Since it would have been awkward to maintain,
479    I bit the bullet and actually _changed_ the mapping between these
480    numbers and primtycs.  The bottom line of this is that you need
481    a new set of bin- and bootfiles.
482    
483    I have built new bootfiles for all architectures, so doing a fresh
484    checkout and config/install.sh should be all you need.
485    
486    The newly created library's name is
487    
488        $smlnj/viscomp/debugprof.cm
489    
490    and its sources live under
491    
492        src/compiler/DebugProf
493    
494    ----------------------------------------------------------------------
495    Name: Matthias Blume
496    Date: 2001/08/15 17:15:00 EDT
497    Tag: blume-20010815-compreorg
498    Description:
499    
500    This is a first cut at reorganizing the CM libraries that make up the
501    core of the compiler.  The idea is to separate out pieces that could
502    be used independently by tools, e.g., the parser, the typechecker, etc.
503    
504    The current status is a step in this direction, but it is not quite
505    satisfactory yet.  Expect more changes in the future.
506    
507    Here is the current (new) organization...
508    
509        What used to be $smlnj/viscomp/core.cm is now divided into
510        six CM libraries:
511    
512             $smlnj/viscomp/basics.cm
513                           /parser.cm
514                           /elabdata.cm
515                           /elaborate.cm
516                           /execute.cm
517                           /core.cm
518    
519        The CM files for these libraries live under src/system/smlnj/viscomp.
520        All these libraries are proxy libraries that contain precisely
521        one CM library component.  Here are the locations of the components
522        (all within the src/compiler tree):
523    
524             Basics/basics.cm
525             Parse/parser.cm
526             ElabData/elabdata.cm
527             Elaborator/elaborate.cm
528             Execution/execute.cm
529             core.cm
530    
531         [This organization is the same that has been used already
532         for a while for the architecture-specific parts of the visible
533         compiler and for the old version of core.cm.]
534    
535         As you will notice, many source files have been moved from their
536         respective original locations to a new home in one of the above
537         subtrees.
538    
539         The division of labor between the new libraries is the following:
540    
541             basics.cm:
542                - Simple, basic definitions that pertain to many (or all) of
543                  the other libraries.
544             parser.cm:
545                - The SML parser, producing output of type Ast.dec.
546                - The type family for Ast is also defined and exported here.
547             elabdata.cm:
548                - The datatypes that describe input and output of the elaborator.
549                  This includes types, absyn, and static environments.
550             elaborator.cm:
551                - The SML/NJ type checker and elaborator.
552                  This maps an Ast.dec (with a given static environment) to
553                  an Absyn.dec (with a new static environment).
554                - This libraries implements certain modules that used to be
555                  structures as functors (to remove dependencies on FLINT).
556             execute.cm:
557                - Everything having to do with executing binary code objects.
558                - Dynamic environments.
559             core.cm:
560                - SML/NJ-specific instantiations of the elaborator and MLRISC.
561                - Top-level modules.
562                - FLINT (this should eventually become its own library)
563    
564    Notes:
565    
566    I am not 100% happy with the way I separated the elaborator (and its
567    data structures) from FLINT.  Two instances of the same problem:
568    
569        1. Data structures contain certain fields that carry FLINT-specific
570           information.  I hacked around this using exn and the property list
571           module from smlnj-lib.  But the fact that there are middle-end
572           specific fields around at all is a bit annoying.
573    
574        2. The elaborator calculates certain FLINT-related information.  I tried
575           to make this as abstract as I could using functorization, but, again,
576           the fact that the elaborator has to perform calculations on behalf
577           of the middle-end at all is not nice.
578    
579        3. Having to used exn and property lists is unfortunate because it
580           weakens type checking.  The other alternative (parameterizing
581           nearly *everything*) is not appealing, though.
582    
583    I removed the "rebinding =" warning hack because due to the new organization
584    it was awkward to maintain it.  As a result, the compiler now issues some of
585    these warnings when compiling init.cmi during bootstrap compilation. On
586    the plus side, you also get a warning when you do, for example:
587       val op = = Int32.+
588    which was not the case up to now.
589    
590    I placed "assign" and "deref" into the _Core structure so that the
591    code that deals with the "lazy" keyword can find them there.  This
592    removes the need for having access to the primitive environment
593    during elaboration.
594    
595    ----------------------------------------------------------------------
596    Name: Matthias Blume
597    Date: 2001/08/13
598    Tag: blume-20010813-closures
599    Description:
600    
601    This fix was sent to us by Zhong Shao.  It is supposed to improve the
602    performance of certain loops by avoiding needless closure allocation.
603    
604    ----------------------------------------------------------------------
605    Name: Lal George
606    Date: 2001/07/31 10:03:23 EDT 2001
607    Tag: george-20010731-x86-fmalloc
608    Description: Fixed bug in x86 calls
609    
610        There was a bug where call instructions would mysteriously
611        vanish. The call instruction had to be one that returned
612        a floating point value.
613    
614    ----------------------------------------------------------------------
615    Name: Lal George
616    Date: 2001/07/19 16:36:29 EDT 2001
617    Tag: george-20010719-simple-cells
618    Description:
619    
620    I have dramatically simplified the interface for CELLS in MLRISC.
621    
622    In summary, the cells interface is broken up into three parts:
623    
624      1. CellsBasis : CELLS_BASIS
625    
626            CellsBasis is a top level structure and common for all
627            architectures.  it contains the definitions of basic datatypes
628            and utility  functions over these types.
629    
630      2. functor Cells() : CELLS
631    
632            Cells generates an interface for CELLS that incorporates the
633            specific resources on the target architecture, such as the
634            presence of special register classes, their number and size,
635            and various useful substructures.
636    
637      3. <ARCH>CELLS
638    
639            e.g. SparcCells: SPARCCELLS
640    
641            <ARCH>CELLS usually contains additional bindings for special
642            registers  on the architecture, such as:
643    
644                    val r0 : cell           (* register zero *)
645                    val y : cell            (* Y register *)
646                    val psr : cell          (* processor status register *)
647                    ...
648    
649            The structure returned by applying the Cells functor is opened
650            in this interface.
651    
652    The main implication of all this is that the datatypes for cells is
653    split between CellsBasis and CELLS -- a fairly simple change for user
654    code.
655    
656    In the old scheme the CELLS interface had a definitional binding of
657    the form:
658    
659            signature CELLS = sig
660    
661               structure CellsBasis = CellsBasis
662    
663               ...
664    
665            end
666    
667    With all the sharing constraints that goes on in MLRISC, this old
668    design  quickly leads to errors such as:
669    
670            "structure definition spec inside of sharing ... "
671    
672    
673    and appears to require an unacceptable amount of sharing and where
674    constraint hackery.
675    
676    I think this error message (the interaction of definitional specs and
677    sharing) requires more explanation on our web page.
678    
679    ----------------------------------------------------------------------
680    Name: Matthias Blume
681    Date: 2001/07/19 15:00:00 EDT
682    Tag: blume-20010719-libreorg
683    Description:
684    
685    This update puts together a fairly extensive but straightforward change
686    to the way the libraries that implement the interactive system are
687    organized:
688    
689       The biggest change is the elimination of structure Compiler.  As a
690       replacement for this structure, there is now a CM library
691       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
692       that exports all the substructures of the original structure Compiler
693       directly.  So instead of saying Compiler.Foo.bar one now simply
694       says Foo.bar.  (The CM libraries actually export a collection of
695       structures that is richer than the collection of substructures of
696       structure Compiler.)
697    
698       To make the transition smooth, there is a separate library called
699       $smlnj/compiler/compiler.cm which puts together and exports the
700       original structure Compiler (or at least something very close to it).
701    
702       There are five members of the original structure Compiler
703       that are not exported directly but which instead became members
704       of a new structure Backend (described by signature BACKEND).  These are:
705       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
706       Interact (: INTERACT), structure Machine (: MACHINE), and val
707       architecture (: string).
708    
709       Structure Compiler.Version has become structure CompilerVersion.
710    
711       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
712       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
713       or x86, respectively.
714       Each of these exports the same frontend structures that
715       $smlnj/compiler.cm exports.  But they do not have a structure Backend
716       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
717       Hppa, PPC, Sparc, or X86, respectively.
718    
719       Library $smlnj/compiler/all.cm exports the union of the exports of
720       $smlnj/compiler/<arch>.cm
721    
722       There are no structures <Arch>Compiler anymore, use
723       $smlnj/compiler/<arch>.cm instead.
724    
725       Library host-compiler-0.cm is gone.  Instead, the internal library
726       that instantiates CM is now called cm0.cm.  Selection of the host
727       compiler (backend) is no longer done here but. (Responsibility for it
728       now lies with $smlnj/compiler/current.cm.  This seems to be more
729       logical.)
730    
731       Many individual files have been moved or renamed.  Some files have
732       been split into multiple files, and some "dead" files have been deleted.
733    
734    Aside from these changes to library organization, there are also changes
735    to the way the code itself is organized:
736    
737       Structure Binfile has been re-implemented in such a way that it no
738       longer needs any knowledge of the compiler.  It exclusively deals
739       with the details of binfile layout.  It no longer invokes the
740       compiler (for the purpose of creating new prospective binfile
741       content), and it no longer has any knowledge of how to interpret
742       pickles.
743    
744       Structure Compile (: COMPILE) has been stripped down to the bare
745       essentials of compilation.  It no longer deals with linking/execution.
746       The interface has been cleaned up considerably.
747    
748       Utility routines for dealing with linking and execution have been
749       moved into their own substructures.
750    
751       (The ultimate goal of these changes is to provide a light-weight
752       binfile loader/linker (at least for, e.g., stable libraries) that
753       does not require CM or the compiler to be present.)
754    
755    CM documentation has been updated to reflect the changes to library
756    organization.
757    
758    ----------------------------------------------------------------------
759    Name: Matthias Blume
760    Date: 2001/07/10 17:30:00 EDT
761    Tag: Release_110_34
762    Description:
763    
764    Minor tweak to 110.34 (re-tagged):
765    
766      - README.html file added to CVS repository
767      - runtime compiles properly under FreeBSD 3.X and 4.X
768    
769    ----------------------------------------------------------------------
770    Name: Matthias Blume
771    Date: 2001/07/10 17:30:00 EDT
772    Tag: Release_110_34
773    Description:
774    
775    New version number (110.34). New bootfiles.
776    
777    ----------------------------------------------------------------------
778    Name: Matthias Blume
779    Date: 2001/07/09 16:00:00 EDT
780    Tag: blume-20010709-more-varargs
781    Description:
782    
783    I changed the handling of varargs in ml-nlffigen again:
784    The ellipsis ... will now simply be ignored (with an accompanying warning).
785    
786    The immediate effect is that you can actually call a varargs function
787    from ML -- but you can't actually supply any arguments beyond the ones
788    specified explicitly.  (For example, you can call printf with its format
789    string, but you cannot pass additional arguments.)
790    
791    This behavior is only marginally more useful than the one before, but
792    it has the advantage that a function or, more importantly, a function
793    type never gets dropped on the floor, thus avoiding follow-up problems with
794    other types that refer to the offending one.
795    
796    ----------------------------------------------------------------------
797    Name: Matthias Blume
798    Date: 2001/07/09 11:25:00 EDT
799    Tag: blume-20010709-varargs
800    Description:
801    
802    1. ckit-lib.cm now exports structure Error
803    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
804       with a warning accompanied by a source location.  Moreover, it
805       merely skips the offending function or type and proceeds with the
806       rest of its work.u  As a result, one can safely feed C code containing
807       "..." to ml-nlffigen.
808    3. There are some internal improvements to CM, providing slightly
809       more general string substitutions in the tools subsystem.
810    
811    ----------------------------------------------------------------------
812    Name: Matthias Blume
813    Date: 2001/06/27 15:10:00 EDT
814    Tag: blume-20010627-concur
815    Description:
816    
817    Fixed a small bug in CM's handling of parallel compilation.
818    (You could observe the bug by Control-C-interrupting an ordinary
819    CMB.make or CM.stabilize and then attaching some compile servers.
820    The result was that all of a sudden the previously interrupted
821    compilation would continue on its own.  This was because of
822    an over-optimization: CM did not bother to clean out certain queues
823    when no servers were attached "anyway", resulting in the contents
824    of these queues to grab control when new servers did get attached.)
825    
826    There is also another minor update to the CM manual.
827    
828    ----------------------------------------------------------------------
829    Name: Matthias Blume
830    Date: 2001/06/26 16:15:00 EDT
831    Tag: blume-20010626-cmdoc
832    Description:
833    
834    Minor typo fixed in CM manual (syntax diagram for libraries).
835    
836    ----------------------------------------------------------------------
837    Name: Matthias Blume
838    Date: 2001/06/25 22:55:00 EDT
839    Tag: blume-20010625-x86pc
840    Description:
841    
842    Fixed a nasty bug in the X86 assembly code that caused signal
843    handlers to fail (crash) randomly.
844    
845    ----------------------------------------------------------------------
846    Name: Matthias Blume
847    Date: 2001/06/25 12:05:00 EDT
848    Tag: blume-20010625-nlffigen
849    Description:
850    
851    This update fixes a number of minor bugs in ml-nlffigen as reported by
852    Nick Carter <nbc@andrew.cmu.edu>.
853    
854      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
855      2. Default names for generated files are now derived from the name of
856         the C file *without its directory*.  In particular, this causes generated
857         files to be placed locally even if the C file is in some system directory.
858      3. Default names for generated signatures and structures are also derived
859         from the C file name without its directory.  This avoids silly things
860         like "structure GL/GL".
861         (Other silly names are still possible because ml-nlffigen does not do
862          a thorough check of whether generated names are legal ML identifiers.
863          When in doubt, use command line arguments to force particular names.)
864    
865    ----------------------------------------------------------------------
866    Name: Matthias Blume
867    Date: 2001/06/21 12:25:00 EDT
868    Tag: blume-20010621-eXene
869    Description:
870    
871    eXene now compiles and (sort of) works again.
872    
873    The library name (for version > 110.33) is $/eXene.cm.
874    
875    I also added an new example in src/eXene/examples/nbody.  See the
876    README file there for details.
877    
878    ----------------------------------------------------------------------
879    Name: Matthias Blume
880    Date: 2001/06/20 16:40:00 EDT
881    Tag: blume-20010620-cml
882    Description:
883    
884    CML now compiles and works again.
885    
886    Libraries (for version > 110.33):
887    
888      $cml/cml.cm            Main CML library.
889      $cml/basis.cm          CML's version of $/basis.cm.
890      $cml/cml-internal.cm   Internal helper library.
891      $cml/core-cml.cm       Internal helper library.
892      $cml-lib/trace-cml.cm  Tracing facility.
893      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
894    
895    The installer (config/install.sh) has been taught how to properly
896    install this stuff.
897    
898    ----------------------------------------------------------------------
899    Name: Matthias Blume
900    Date: 2001/06/19 17:55:00 EDT
901    Tag: blume-20010619-instantiate
902    Description:
903    
904    This un-breaks the fix for bug 1432.
905    (The bug was originally fixed in 110.9 but I broke it again some
906    time after that.)
907    
908    ----------------------------------------------------------------------
909    Name: Matthias Blume
910    Date: 2001/06/19 17:25:00 EDT
911    Tag: blume-20010619-signals
912    Description:
913    
914    This should (hopefully) fix the long-standing signal handling bug.
915    (The runtime system was constructing a continuation record with an
916    incorrect descriptor which would cause the GC to drop data on the floor...)
917    
918    ----------------------------------------------------------------------
919    Name: Matthias Blume
920    Date: 2001/06/15 15:05:00 EDT
921    Tag: blume-20010615-moresparc
922    Description:
923    
924    Here is a short late-hour update related to Sparc c-calls:
925    
926     -- made handling of double-word arguments a bit smarter
927    
928     -- instruction selection phase tries to collapse certain clumsily
929        constructed ML-Trees; typical example:
930    
931            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
932    
933        This currently has no further impact on SML/NJ since mlriscGen does
934        not seem to generate such patterns in the first place, and c-calls
935        (which did generate them in the beginning) has meanwhile been fixed
936        so as to avoid them as well.
937    
938    ----------------------------------------------------------------------
939    Name: Matthias Blume
940    Date: 2001/06/15 15:05:00 EDT
941    Tag: blume-20010615-sparc
942    Description:
943    
944    The purpose of this update is to provide an implementation of NLFFI
945    on Sparc machines.
946    
947    Here are the changes in detail:
948    
949       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
950       the Sparc implementation of the c-calls API.
951       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
952       for accessing the ML frame.  Thus, we have a real frame pointer and
953       can freely modify %sp without need for an omit-frame-ptr phase.
954       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
955       this case.
956       * ml-nlffigen has been taught to produce code for different architectures
957       and calling conventions.
958       * In a way similar to what was done in the x86 case, the Sparc
959       backend uses its own specific extension to mltree.  (For example,
960       it needs to be able to generate UNIMP instructions which are part
961       of the calling convention.)
962       * ml-nlffi-lib was reorganized to make it more modular (in particular,
963       to make it easier to plug in new machine- and os-dependent parts).
964    
965    There are some other fairly unrelated bug fixes and cleanups as well:
966    
967       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
968       that they properly share their libraries with existing SML/NJ libraries.
969       * I fixed a minor cosmetic bug in CM, supressing certain spurious
970       follow-up error messages.
971       * Updates to CM/CMB documentation.
972    
973    TODO items:
974    
975       * MLRISC should use a different register as its asmTemp on the Sparc.
976         (The current %o2 is a really bad choice because it is part of the
977         calling conventions, so things might interfere in unexpected ways.)
978    
979    ----------------------------------------------------------------------
980    Name: Matthias Blume
981    Date: 2001/06/07
982    Tag: blume-20010607-calls
983    Description:
984    
985    A number of internal changes related to C calls and calling conventions:
986    
987    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
988       number of bytes popped implicitly (by the callee).  In most cases
989       this field is 0 but on x86/win32 it is some non-zero value.  This
990       is information provided for the benefit of the "omit-frameptr" pass.
991    2. The CALL instruction on the x86 carries a similar "pops" field.
992       The instruction selection phase copies its value from the ML-Tree
993       CALL statement.
994    3. On all other architectures, the instruction selection phase checks
995       whether "pops=0" and complains if not.
996    4. The c-calls implementation for x86 now accepts two calling conventions:
997       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
998       up after the call and pops is set to 0.  For "stdcall", the caller
999       does nothing, leaving the cleanup to the callee; pops is set to
1000       the number of bytes that were pushed onto the stack.
1001    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1002       distinguish between "ccall" and "stdcall".
1003    6. The UNIMP instruction has been added to the supported Sparc instruction
1004       set. (This is needed for implementing the official C calling convention
1005       on this architecture.)
1006    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1007       work with the latest CM.
1008    
1009    ----------------------------------------------------------------------
1010    Name: Matthias Blume
1011    Date: 2001/06/05 15:10:00 EDT
1012    Tag: blume-20010605-cm-index
1013    Description:
1014    
1015    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1016    
1017    1. CM can now generate "index files".  These are human-readable files
1018       that list on a per-.cm-file basis each toplevel symbol defined or
1019       imported.  The location of the index file for
1020       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1021       To enable index-file generation, set CM.Control.generate_index to true
1022       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1023    
1024       The CM manual has been updated accordingly.
1025    
1026    2. I made some slight modifications to the c-calls API in MLRISC.
1027    
1028         a) There is now a callback to support saving/restoring of
1029            dedicated but caller-save registers around the actual call
1030            instruction.
1031         b) One can optionally specify a comment-annotation for the
1032            call instruction.
1033    
1034    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1035       (For example, the comment annotation shows the C prototype of
1036        the function being called.)
1037    
1038    ----------------------------------------------------------------------
1039    Name: Matthias Blume
1040    Date: 2001/06/01 13:30:00 EDT
1041    Tag: blume-20010601-nlffi-cleanup
1042    Description:
1043    
1044    This is mostly a cleanup of MLFFI stuff:
1045    
1046       - some signature files have been put into a more exposed place
1047       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1048       - ml-nlffigen changed accordingly
1049       - tutorial updated
1050    
1051    Other changes:
1052    
1053       - author's affiliation in CM manual(s) updated
1054       - some more recognized keywords added to Allen's sml.sty
1055    
1056    ----------------------------------------------------------------------
1057    Name: Matthias Blume
1058    Date: 2001/05/25 15:30:00 EDT
1059    Tag: blume-20010525-iptr
1060    Description:
1061    
1062      - put the official 110.33-README (as it appears on the ftp server) under
1063        CVS
1064      - fixed a small bug related to incomplete pointer types in
1065        ml-nlffigen
1066      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1067        (it does not need the 'f type parameter)
1068    
1069    ----------------------------------------------------------------------
1070    Name: Matthias Blume
1071    Date: 2001/05/23 14:30:00 EDT
1072    Tag: Release_110_33
1073    Description:
1074    
1075    New version number (110.33).  New bootfiles.
1076    
1077    ----------------------------------------------------------------------
1078    Name: Matthias Blume
1079    Date: 2001/05/22 18:06:00 EDT
1080    Tag: blume-20010522-targets
1081    Description:
1082    
1083    Made install.sh use file config/targets.customized if it exists, falling
1084    back to config/targets if it doesn't.  This way one can have a customized
1085    version of the targets file without touching the "real thing", thus
1086    eliminating the constant fear of accidentally checking something bogus
1087    back into the CVS repository...  (File config/targets.customized must
1088    not be added to the repository!)
1089    
1090    ----------------------------------------------------------------------
1091    Name: Matthias Blume
1092    Date: 2001/05/22 16:30:00 EDT
1093    Tag: blume-20010522-minitut
1094    Description:
1095    
1096    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1097       struct returns.
1098    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1099       incomplete, preliminary documentation for NLFFI.
1100    
1101    ----------------------------------------------------------------------
1102    Name: Matthias Blume
1103    Date: 2001/05/14 11:30:00 EDT
1104    Tag: blume-20010514-script
1105    Description:
1106    
1107    Some bugs in install script fixed.
1108    
1109    In addition to that I also made a slight change to the NLFFI API:
1110    Functors generated by ml-nlffigen now take the dynamic library as a
1111    straight functor argument, not as a suspended one.  (The original
1112    functor code used to force the suspension right away anyway, so there
1113    was nothing gained by this complication of the interface.)
1114    
1115    ----------------------------------------------------------------------
1116    Name: Matthias Blume
1117    Date: 2001/05/11 14:35:00 EDT
1118    Tag: blume-20010511-ml-nlffi
1119    Description:
1120    
1121    I finally took the plunge and added my new FFI code to the main
1122    repository.  For x86-linux it is now ready for prime-time.
1123    
1124    There are two new subdirectories of "src":
1125    
1126      - ml-nlffi-lib:
1127           The utility library for programs using the FFI interface.
1128           Here is the implementation of $/c.cm and its associated low-level
1129           partners $/c-int.cm and $/memory.cm.
1130      - ml-nlffigen:
1131           A stand-alone program for generating ML glue code from C source
1132           code.
1133    
1134    Building ml-nlffigen requires $/ckit-lib.cm.
1135    
1136    The config/install.sh script has been updates to do the Right Thing
1137    (hopefully).
1138    
1139    Notice that the source tree for the C-Kit will not be put under "src"
1140    but directly under the installation root directory.  (This is the
1141    structure that currently exists on the CVS server when you check out
1142    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1143    
1144    Bugs: No documentation yet.
1145    
1146    ----------------------------------------------------------------------
1147    Name: Matthias Blume
1148    Date: 2001/05/09 16:35:00 EDT
1149    Tag: blume-20010509-cpscontract
1150    Description:
1151    
1152    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1153    wrapper/unwrapper elimination did not decrement usage counts and some
1154    dead variables got overlooked by the dead-up logic.)
1155    
1156    ----------------------------------------------------------------------
1157    Name: Lal George
1158    Date: 2001/05/08  17:26:09 EDT
1159    Tag: george-20010508-omit-frameptr
1160    Description:
1161    
1162    Changes to implement the omit-frame-pointer optimization to support
1163    raw C calls. For now, there is only support on the Intel x86, but
1164    other architectures will follow as more experience is gained with this.
1165    
1166    
1167    ----------------------------------------------------------------------
1168    Name: Matthias Blume
1169    Date: 2001/05/07 14:40:00 EDT
1170    Tag: blume-20010507-proxies
1171    Description:
1172    
1173    I made into "proxy libraries" all libraries that qualify for such a
1174    change.  (A qualifying library is a library that has another library or
1175    groups as its sole member and repeats that member's export list
1176    verbatim.  A proxy library avoids this repetition by omitting its export
1177    list, effectively inheriting the list that its (only) member exports.
1178    See the CM manual for more explanation.)
1179    The main effect is that explicit export lists for these libraries
1180    do not have to be kepts in sync, making maintenance a bit easier.
1181    
1182    I also added copyright notices to many .cm-files.
1183    
1184    Last but not least, I made a new set of bootfiles.
1185    
1186    ----------------------------------------------------------------------
1187    Name: Matthias Blume
1188    Date: 2001/05/04 17:00:00 EDT
1189    Tag: blume-20010504-cm-lsplit
1190    Description:
1191    
1192    0. John merged pending changes to $/smlnj-lib.cm
1193    
1194    1. Allen's previous change accidentally backed out of one of Lal's
1195       earlier changes.  I undid this mistake (re-introducing Lal's change).
1196    
1197    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1198       within the compiler where applicable.  There is some code simplification
1199       because of that.
1200    
1201    3. The "split" phase (in FLINT) is now part of the default list of phases.
1202       Compiler.Control.LambdaSplitting.* can be used to globally control the
1203       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1204       it can now also be controlled on a per-source basis: CM has been taught
1205       a new tool parameter applicable to ML source files.
1206    
1207       - To turn lambda-splitting off completely:
1208            local open Compiler.Control.LambdaSplitting in
1209                val _ = set Off
1210            end
1211       - To make "no lambda-splitting" the global default (but allow per-source
1212         overriding); this is the initial setting:
1213            local open Compiler.Control.LambdaSplitting in
1214                val _ = set (Default NONE)
1215            end
1216       - To make "lambda-splitting with aggressiveness a" the global default
1217         (and allow per-source overriding):
1218            local open Compiler.Control.LambdaSplitting in
1219                val _ = set (Default (SOME a))
1220            end
1221    
1222       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1223         write (in the respective .cm-file):
1224            a.sml (lambdasplitting:off)
1225       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1226            a.sml (lambdasplitting:on)
1227       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1228         <a> is a decimal non-negative integer):
1229            a.sml (lambdasplitting:<a>)
1230       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1231            a.sml (lambdasplitting:infinity)
1232       - To use the global default for a.sml:
1233            a.sml (lambdasplitting:default)
1234         or simply
1235            a.sml
1236    
1237    ----------------------------------------------------------------------
1238    Name: Allen Leung
1239    Date: 2001/05/04 01:57:00 EDT
1240    Tag: leunga-20010504-sync
1241    Description:
1242    
1243      MLRISC features.
1244    
1245      1. Fix to CMPXCHG instructions.
1246      2. Changed RA interface to allow annotations in callbacks.
1247      3. Added a new method to the stream interface to allow annotations updates.
1248    
1249    ----------------------------------------------------------------------
1250    Name: Matthias Blume
1251    Date: 2001/05/01 11:45:00 EDT
1252    Tag: blume-20010501-pcedittmp
1253    Description:
1254    
1255    Changed install.sh to use the current working directory instead of
1256    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1257    of /usr/tmp caused trouble with MacOS X because of file premission
1258    problems.
1259    
1260    ----------------------------------------------------------------------
1261    Name: Matthias Blume
1262    Date: 2001/04/20 11:10:00 EDT
1263    Tag: blume-20010420-inMLflag
1264    Description:
1265    
1266     - added vp_limitPtrMask to vproc-state.h
1267       (for use by the raw-C-calls mechanism to implement proper interrupt
1268        handling)
1269     - made the ML compiler aware of various data-structure offsets so it
1270       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1271     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1272       raw C-calls
1273    
1274    ----------------------------------------------------------------------
1275    Name: Lal George
1276    Date: 2001/04/20 09:15:28 EDT
1277    Tag: george-20010420-macosX
1278    Description:
1279    
1280     - Changes to port to Mac OS X; Darwin.
1281    
1282     - In the process I found that sqrt was broken on the PPC, because the
1283       fsqrt instruction is not implemented.
1284    
1285    ----------------------------------------------------------------------
1286    Name: Matthias Blume
1287    Date: 2001/04/18 12:45:00 EDT
1288    Tag: blume-20010418-ccalls
1289    Description:
1290    
1291     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1292       (this bug prevented structure arguments containing pointers from being
1293        passed correctly)
1294     - changed the raw-C-call code in mlriscGen.sml in such a way that
1295       structure arguments are represented as a pointer to the beginning
1296       of the structure (instead of having a series of synthesized arguments,
1297       one for each structure member)
1298    
1299     - made makeml script's verbosity level configurable via environment
1300       variable (MAKEML_VERBOSITY)
1301    
1302     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1303       in rawmem-x86.sml; we are now using the real thing
1304    
1305    ----------------------------------------------------------------------
1306    Name: Matthias Blume
1307    Date: 2001/03/22 16:25:00 EST
1308    Tag: blume-20010322-bootfiles
1309    Description:
1310    
1311    Created a new set of bootfiles (for your automatic installation convenience).
1312    
1313    ----------------------------------------------------------------------
1314    Name: Matthias Blume
1315    Date: 2001/03/22 15:10:00 EST
1316    Tag: blume-20010322-rawmem-parcm
1317    Description:
1318    
1319    1. All "raw memory access" primitives for the new FFI are implemented now
1320       (at least on the x86).
1321    2. Some further cleanup of CM's parallel make mechanism.
1322    
1323    ----------------------------------------------------------------------
1324    Name: Matthias Blume
1325    Date: 2001/03/19 17:53:00 EST
1326    Tag: blume-20010319-parallel
1327    Description:
1328    
1329    Parallel make (using compile servers) now works again.
1330    
1331    To this end, CM.stabilize and CMB.make have been modified to work in
1332    two passes when compile servers are attached:
1333       1. Compile everything, do not perform stabilization; this pass
1334          uses compile servers
1335       2. Stabilize everything; this pass does not use compile servers
1336    If there are no compile servers, the two passes are combined into one
1337    (as before).  Splitting the passes increases the inherent parallelism
1338    in the dependency graph because the entire graph including all
1339    libraries is available at the same time.  This, in turn, improves
1340    server utilization.  The downside is that the master process will
1341    have to do some extra work after compilation is done (because for
1342    technical reasons it must re-read all the binfiles during stabilization).
1343    
1344    ----------------------------------------------------------------------
1345    Name: Matthias Blume
1346    Date: 2001/03/16 12:22:00 EST
1347    Tag: blume-20010316-bootfiles
1348    Description:
1349    
1350    Created a new set of bootfiles (for your automatic installation convenience).
1351    
1352    ----------------------------------------------------------------------
1353    Name: Matthias Blume
1354    Date: 2001/03/16 11:00:00 EST
1355    Tag: blume-20010316-MLTREE-fixup
1356    Description:
1357    
1358    This is a minor fixup for an (untagged) earlier commit by Allen.
1359    (A file was missing).
1360    
1361    ----------------------------------------------------------------------
1362    Name: Allen Leung
1363    Date: Mon Mar  5 18:54:57 EST 2001
1364    Tag: leunga-20010305-cut-support
1365    
1366    1. New support for alternative control-flow in MLTREE.
1367       Currently we support
1368    
1369          FLOW_TO(CALL ...., [k1,...,kn])
1370    
1371       This is needed for 'cuts to' in C-- and try/handle-like constructs
1372       in Moby
1373    
1374       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1375    
1376    2. Register Allocator
1377    
1378       Changes in interface [from Fermin, John]
1379    
1380    3. Alpha 8-bit SLL support [Fermin]
1381    
1382    4. All architectures
1383    
1384       A new module (ClusterExpandCopies) for expanding parallel copies.
1385    
1386    ----------------------------------------------------------------------
1387    Name: Allen Leung
1388    Date: 2001/02/27 23:07:00 EST
1389    Tag: leunga-20010227-minor-stuff
1390    
1391    1. Alpha bug fix for CMOVNE
1392    2. Handle mltree COND(..,FCMP ...,...)
1393    3. Bug fix in simplifier
1394    
1395    ----------------------------------------------------------------------
1396    Name: Matthias Blume
1397    Date: 2001/01/30 17:50:00 EST
1398    Tag: blume-20010130-sync
1399    Description:
1400    
1401    This is just a minor update to sync my devel branch with the main brach.
1402    The only visible change is the addition of some README files.
1403    
1404    ----------------------------------------------------------------------
1405    Name: Matthias Blume
1406    Date: 2001/01/12 23:30:00 JST
1407    Tag: blume-20010112-bootfiles
1408    Description:
1409    
1410    Made a new set of bootfiles that goes with the current state of the
1411    repository.
1412    
1413    ----------------------------------------------------------------------
1414    Name: Matthias Blume
1415    Date: 2001/01/12 21:20:00 JST
1416    Tag: blume-20010112-sync
1417    Description:
1418    
1419    I am just flushing out some minor changes that had accumulated in
1420    my private branch in order to sync with the main tree.  (This is
1421    mainly because I had CVS trouble when trying to merge _into_ my
1422    private branch.)
1423    
1424    Most people should be completely unaffected by this.
1425    
1426    ----------------------------------------------------------------------
1427    Name: Allen Leung
1428    Date: Thu Jan 11 21:03:00 EST 2001
1429    Tag: leunga-20010111-labexp=mltree
1430    Description:
1431    
1432    1.  Removed the type LabelExp and replace it by MLTree.
1433    2.  Rewritten mltree-simplify with the pattern matcher tool.
1434    3.  There were some bugs in alpha code generator which would break
1435        64-bit code generation.
1436    4.  Redo the tools to generate code with the
1437    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1438        are now generated by perl scripts.
1439    
1440    ----------------------------------------------------------------------
1441    Name: Matthias Blume
1442    Date: 2001/01/10 21:55:00 JST
1443    Tag: blume-20010110-rcc
1444    Description:
1445    
1446    The RCC stuff now seems to work (but only on the x86).
1447    This required hacking of the c-calls interface (and -implementation) in
1448    MLRISC.
1449    
1450    Normal compiler users should be unaffected.
1451    
1452    ----------------------------------------------------------------------
1453    Name: Matthias Blume
1454    Date: 2001/01/09 01:20:00 JST
1455    Tag: blume-20010109-rcc
1456    Description:
1457    
1458    This is a fairly big patch, flushing out a large number of pending
1459    changes that I made to my development copy over the last couple of days.
1460    
1461    Of practical relevance at this moment is a workaround for a pickling
1462    bug that Allen ran into the other day.  The cause of the bug itself is
1463    still unknown and it might be hard to fix it properly, but the
1464    workaround has some merits of its own (namely somewhat reducing pickling
1465    overhead for certain libraries).  Therefore, I think this solution should
1466    be satisfactory at this time.
1467    
1468    The rest of the changes (i.e., the vast majority) has to do with my
1469    ongoing efforts of providing direct support for C function calls from
1470    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1471    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1472    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1473    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1474    handle RCC.
1475    
1476    The last part (the changes to mlriscGen.sml) are still known to be
1477    wrong on the x86 and not implemented on all other architectures.  But
1478    the infrastructure is in place. I had to change a few functor
1479    signatures in the backend to be able to route the CCalls interface
1480    from MLRISC there, and I had to specialize the mltree type (on the
1481    x86) to include the necessary extensions. (The extensions themselves
1482    were already there and redy to go in MLRISC/x86).
1483    
1484    Everything should be very happy as soon as someone helps me with
1485    mlriscGen.sml...
1486    
1487    In any case, nothing of this should matter to anyone as long as the
1488    new primop is not being used (which is going to be the case unless you
1489    find it where I hid it :). The rest of the compiler is completely
1490    unaffected.
1491    
1492    ----------------------------------------------------------------------
1493    Name: Matthias Blume
1494    Date: 2001/01/05 00:30:00 JST
1495    Tag: blume-20010105-primops
1496    Description:
1497    
1498    Added some experimental support for work that I am doing right now.
1499    These changes mostly concern added primops, but there is also a new
1500    experimental C library in the runtime system (but currently not enabled
1501    anywhere except on Linux/X86).
1502    
1503    In the course of adding primops (and playing with them), I discovered that
1504    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1505    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1506    To recover, I made type information in INL_PRIM mandatory and changed
1507    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1508    has complete, correct type information (i.e., no bottom types).
1509    
1510    Since all these changes mean that we need new binfiles, I also bumped the
1511    version number to 110.32.1.
1512    
1513    ----------------------------------------------------------------------
1514    Name: Matthias Blume
1515    Date: 2000/12/30 22:10:00 JST
1516    Tag: blume-20001230-various
1517    Description:
1518    
1519    Added proxy libraries for MLRISC and let MLRISC libraries refer
1520    to each other using path anchors.  (See CM manual for explanation.)
1521    
1522    Updated CM documentation.
1523    
1524    Fixed some bugs in CM.
1525    
1526    Implemented "proxy" libraries (= syntactic sugar for CM).
1527    
1528    Added "-quiet" option to makeml and changed runtime system accordingly.
1529    
1530    Added cleanup handler for exportML to reset timers and compiler stats.
1531    
1532    ----------------------------------------------------------------------
1533    Name: Lal George
1534    Date: 2000/12/22 22:22:58 EST 2000
1535    Tag: Release_110_32
1536    Description:
1537    
1538            Infinite precision used throughout MLRISC.
1539            see MLRISC/mltree/machine-int.sig
1540    
1541    ----------------------------------------------------------------------
1542    Name: Matthias Blume
1543    Date: 2000/12/22 23:16:00 JST
1544    Tag: blume-20001222-warn
1545    Description:
1546    
1547    Corrected wording and formatting of some CM warning message which I
1548    broke in my previous patch.
1549    
1550    ----------------------------------------------------------------------
1551    Name: Matthias Blume
1552    Date: 2000/12/22 21:20:00 JST
1553    Tag: blume-20001222-anchorenv
1554    Description:
1555    
1556    Fixed CM's handling of anchor environments in connection with CMB.make.
1557    
1558    ----------------------------------------------------------------------
1559    Name: Matthias Blume
1560    Date: 2000/12/22 13:15:00 JST
1561    Tag: blume-20001222-cleanup
1562    Description:
1563    
1564    Removed src/cm/ffi which does not (and did not) belong here.
1565    
1566    ----------------------------------------------------------------------
1567    Name: Matthias Blume
1568    Date: 2000/12/21 23:55:00 JST
1569    Tag: blume-20001221-exn
1570    Description:
1571    
1572    Probably most important: CM no longer silently swallows all exceptions
1573    in the compiler.
1574    Plus: some other minor CM changes.  For example, CM now reports some
1575    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1576    
1577    ----------------------------------------------------------------------
1578    Name: Matthias Blume
1579    Date: 2000/12/15 00:01:05 JST
1580    Tag: blume-20001215-dirtool
1581    Description:
1582    
1583    - "dir" tool added.
1584    - improvements and cleanup to Tools structure
1585    - documentation updates
1586    
1587    ----------------------------------------------------------------------
1588    Name: Allen Leung
1589    Date: Thu Dec 14 03:45:24 EST 2000
1590    Description:
1591    Tag:  leunga-20001214-int-inf
1592    Description:
1593    
1594       In IntInf, added these standard functions, which are missing from our
1595    implementation:
1596    
1597        andb : int * int -> int
1598        xorb : int * int -> int
1599        orb  : int * int -> int
1600        notb : int -> int
1601         <<   : int * word -> int
1602        ~>>  : int * word -> int
1603    
1604       Not tested, I hope they are correct.
1605    
1606    ----------------------------------------------------------------------
1607    Name: Allen Leung
1608    Date: Fri Dec  8 19:23:26 EST 2000
1609    Description:
1610    Tag:  leunga-20001208-nowhere
1611    Description:
1612    
1613      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1614    to generate better error messages etc.  Plus a brief manual.
1615    
1616    ----------------------------------------------------------------------
1617    Name: Lal George
1618    Date: 2000/12/08 09:54:02 EST 2000
1619    Tag: Release_110_31
1620    Description:
1621    
1622    - Version 110.31
1623    ----------------------------------------------------------------------
1624    Name: Allen Leung
1625    Date: Thu Dec  7 22:01:04 EST 2000
1626    Tag:  leunga-20001207-cell-monster-hack
1627    Description:
1628    
1629    Major MLRISC internal changes.  Affect all clients.
1630    Summary:
1631    
1632    1.  Type CELLS.cell = int is now replaced by a datatype.
1633        As a result, the old regmap is now gone.  Almost all interfaces
1634        in MLRISC change as a consequence.
1635    
1636    2.  A new brand version of machine description tool (v3.0) that generates
1637        modules expecting the new interface.  The old version is removed.
1638    
1639    3.  The RA interface has been further abstracted into two new functors.
1640        RISC_RA and X86RA.  These functors have much simpler interfaces.
1641        [See also directory MLRISC/demo.]
1642    
1643    4.  Some other new source->source code generation tools are available:
1644    
1645        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1646        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1647           I use this tool to generate the peephole optimizers---with the new
1648           cell type changes, peephole rules are becoming difficult to write
1649           without conditional pattern matching.
1650    
1651    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1652        cover the entire MLRISC source tree so many things broke.
1653    
1654    6.  CM files have been moved to the subdirectory MLRISC/cm.
1655        They are moved because there are a lot of them and they clutter up the
1656        root dir.
1657    
1658    7.  More detailed documentation to come...
1659    
1660        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1661        a makeml -rebuild first.  This is because of other other
1662        changes that Matthias has made (see below).
1663    
1664    
1665    ----------------------------------------------------------------------
1666    Name: Matthias Blume
1667    Date: 2000/11/30 23:12:00 JST
1668    Tag: blume-20001130-filereorg
1669    Description:
1670    
1671    Some manual updates and some file reorganizations in CM.
1672    
1673    ----------------------------------------------------------------------
1674    Name: Matthias Blume
1675    Date: 2000/11/24 17:45:00 JST
1676    Tag: blume-20001124-link
1677    Description:
1678    
1679    Drastically improved link traversal code for the case that the dynamic
1680    value was already loaded at bootstrap time.  As a result, CM and CMB
1681    now both load blazingly fast -- even on a very slow machine.  Also,
1682    memory consumption has been further reduced by this.
1683    
1684    Warning: The format of the PIDMAP file has changed.  THerefore, to
1685    bootstrap you have to do this:
1686    
1687    1. Run CMB.make
1688    2. Make a symbolic link for the boot directory:
1689         ln -s sml.boot.ARCH-OS xxx
1690    3. "Rebuild" the boot directory:
1691         ./makeml -boot xxx -rebuild sml ; rm xxx
1692    4. Boot normally:
1693          ./makeml
1694    
1695    ----------------------------------------------------------------------
1696    Name: Matthias Blume
1697    Date: 2000/11/21 21:20:00 JST
1698    Tag: blume-20001121-tools
1699    Description:
1700    
1701    Continued hacking on autoloading problem -- with success this time.
1702    Also changed tool-plugin mechanism.  See new CM manual.
1703    
1704    ----------------------------------------------------------------------
1705    Name: Matthias Blume
1706    Date: 2000/11/19 14:30:00 JST
1707    Tag:  blume-20001119-autoload
1708    Description:
1709    
1710    Some hacking to make autoloading faster.  Success for CMB, no success
1711    so far for CM.  There is a reduced structure CM' that autoloads faster.
1712    (This is a temporary, non-documented hack to be eliminated again when
1713    the general problem is solved.)
1714    
1715    ----------------------------------------------------------------------
1716    Name: Matthias Blume
1717    Date: 2000/11/17 14:10:00 JST
1718    Tag: blume-20001117-pickle-lib
1719    Description:
1720    
1721    1. Eliminated comp-lib.cm
1722    2. Made pickle-lib.cm
1723    3. Eliminated all uses of intset.sml (from comp-lib.cm)
1724    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1725       equivalent constructs from smlnj-lib.cm (INtHashTable).
1726    5. Point 4. also goes for those uses of intmap.* in MLRISC.
1727       Duplicated intmap modules thrown out.
1728    6. Hunted down all duplicated SCC code and replaced it with
1729       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1730    7. Rewrote Feedback module.
1731    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
1732       should be thrown out and equivalent modules from smlnj-lib.cm
1733       should be used (IntRedBlackSet, IntListSet, ...).
1734    
1735    Confirmed that compiler compiles to fixpoint.
1736    
1737    ----------------------------------------------------------------------
1738    Name: Allen Leung
1739    Date: 2000/11/10 18:00:00
1740    Tag: leunga-20001110-new-x86-fp
1741    
1742    A new x86 floating point code generator has been added.
1743    By default this is turned off.  To turn this on, do:
1744    
1745        CM.autoload "$smlnj/compiler.cm";
1746        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
1747    
1748    Changes:
1749    
1750    1.  Changed FTAN to FPTAN so that the assembly output is correct.
1751    2.  Changed the extension callback for FTANGENT to generate:
1752    
1753              fptan
1754              fstp  %st(0)
1755        instead of
1756              fptan
1757              fstpl ftempmem
1758    
1759    3.  Numerous assembly fixes for x86.
1760    
1761    5.  Cleaned up the machine code output module x86/x86MC.sml and added
1762        support for a whole bunch of instructions and addressing modes:
1763    
1764          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
1765          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
1766          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
1767          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
1768          fxch %st(n)
1769          fld %st(n)
1770          fst %st(n)
1771          fst mem
1772          fstp %st(n)
1773          fucom %st(n)
1774          fucomp %st(n)
1775    
1776        All these are now generated when the fast fp mode is turned on.
1777    
1778    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
1779    
1780    ----------------------------------------------------------------------
1781    Name: Matthias Blume
1782    Date: 2000/11/09 11:20:00 JST
1783    Tag: blume-20001109-scc
1784    Description:
1785    
1786    Eliminated some code duplication:
1787    
1788    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
1789       (Otherwise the functor is useless.)
1790    2. Used GraphSCCFn where SCCUtilFun was used previously.
1791    3. Got rid of SCCUtilFun (in comp-lib.cm).
1792    
1793    ----------------------------------------------------------------------
1794    Name: Lal George
1795    Date: 2000/11/06 09:02:21 EST 2000
1796    Tag: Release_110_30
1797    Description:
1798    
1799    - Version 110.30
1800    ----------------------------------------------------------------------
1801    Name: Matthias Blume
1802    Date: 2000/11/04 14:45:00
1803    Tag: blume-20001104-mlbuild
1804    Description:
1805    
1806    - Made ml-build faster on startup.
1807    - Documentation fixes.
1808    
1809    ----------------------------------------------------------------------
1810    Name: Matthias Blume
1811    Date: 2000/11/02 17:00:00 JST
1812    Tag: blume-20001102-condcomp
1813    Description:
1814    
1815    - Small tweaks to pickler -- new BOOTFILES!
1816    - Version bumped to 110.29.2.
1817    - Added conditional compilation facility to init.cmi (see comment there).
1818    ----------------------------------------------------------------------
1819    Name: Allen Leung
1820    Date: 2000/10/23 19:31:00
1821    Tag: leunga-20001023-demo-ra
1822    
1823    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
1824    2. Test programs for the graph library updated
1825    3. Some new MLRISC demo programs added
1826    
1827    ----------------------------------------------------------------------
1828    Name: Matthias Blume
1829    Date: 2000/08/31 22:15:00 JST
1830    Tag: blume-20001017-errmsg
1831    Description:
1832    
1833    More error message grief: Where there used to be no messages, there
1834    now were some that had bogus error regions.  Fixed.
1835    
1836    ----------------------------------------------------------------------
1837    Name: Matthias Blume
1838    Date: 2000/08/31 17:30:00 JST
1839    Tag: blume-20001017-v110p29p1
1840    Description:
1841    
1842    I made a version 110.29.1 with new bootfiles.
1843    
1844    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
1845              CM documentation changes and a small bugfix in CM's error reporting.
1846    
1847    ----------------------------------------------------------------------
1848    Name: Lal George
1849    Date: 2000/09/27 14:42:35 EDT
1850    Tag: george-20000927-nodestatus
1851    Description:
1852    
1853    Changed the type of the nodestatus, so that:
1854    
1855            SPILLED(~1)             is now SPILLED
1856            SPILLED(m) where m>=0   is now MEMREG(m)
1857            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
1858    
1859    ----------------------------------------------------------------------
1860    Name: Matthias Blume
1861    Date: 2000/09/07 14:45:00 JST
1862    Tag: blume-20000907-cmerrmsg
1863    Description:
1864    
1865    Small tweak to CM to avoid getting ML syntax error messages twice.
1866    
1867    ----------------------------------------------------------------------
1868    Name: Matthias Blume
1869    Date: 2000/08/31 18:00:00 JST
1870    Tag: blume-20000831-cvsbootfiles
1871    Description:
1872    
1873    New URL for boot files (because the 110.29 files on the BL server do
1874    now work correctly with my updated install scripts for yacc and lex).
1875    
1876    ----------------------------------------------------------------------
1877    Name: Matthias Blume
1878    Date: 2000/08/08 12:33:00 JST
1879    Tag: blume-20000808-manual
1880    Description:
1881    
1882    Tiny update to CM manual.
1883    
1884    ----------------------------------------------------------------------
1885    Name: Allen Leung
1886    Date: 2000/08/7 19:31:00
1887    Tag: leunga-20000807-a-whole-bunch-of-stuff
1888    
1889      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
1890    and Mobdy.
1891    
1892    1.  x86
1893    
1894       a.  Fixes to peephole module by John and Dan.
1895       b.  Assembly fix to SETcc by Allen.
1896       c.  Fix to c-call by John.
1897       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
1898       e.  Instruction selection optimization to SETcc as suggested by John.
1899    
1900           For example,
1901    
1902            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
1903    
1904           should generate:
1905    
1906            MOVL a, x
1907            SUBL b, x
1908            SHRL 31, x
1909    
1910    2.  IR stuff
1911    
1912         A bunch of new DJ-graph related algorithms added.  These
1913         speed up SSA construction.
1914    
1915    3.  SSA + Scheduling
1916    
1917         Added code for SSA and scheduling to the repository
1918    
1919    ----------------------------------------------------------------------
1920    Name: Lal George
1921    Date: 2000/07/27 11:53:14 EDT
1922    
1923    Tag: lal-20000727-linux-ppc
1924    Description:
1925    
1926     Made changes to support Linux PPC.
1927     p.s. I have confirmation that the 110.29 boot files work fine.
1928    
1929    ----------------------------------------------------------------------
1930    Name: Matthias Blume
1931    Date: 2000/07/27 17:40:00 JST
1932    Tag: blume-20000727-scripts
1933    Description:
1934    
1935    !!!! WARNING !!!!
1936    You must recompile the runtime system!
1937    !!!! WARNING !!!!
1938    
1939    This is basically another round of script-enhancements:
1940    
1941    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
1942       and undefine CM preprocessor symbols.
1943    
1944    2. ml-build avoids generating a new heap image if it finds that the
1945       existing one is still ok.  (The condition is that no ML file had to
1946       be recompiled and all ML files are found to be older that the heap
1947       file.)
1948    
1949       To make this work smoothly, I also hacked the runtime system as
1950       well as SMLofNJ.SysInfo to get access to the heap image suffix
1951       (.sparc-solaris, ...) that is currently being used.
1952    
1953       Moreover, the signature of CM.mk_standalone has changed.  See the
1954       CM manual.
1955    
1956    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
1957       CM manual for details.)
1958    
1959    4. More CM manual updates:
1960        - all of the above has been documented.
1961        - there is now a section describing the (CM-related) command line
1962          arguments that are accepted by the "sml" command
1963    
1964    ----------------------------------------------------------------------
1965    Name: Matthias Blume
1966    Date: 2000/07/25 16:20:00 JST
1967    Tag: blume-20000725-makedepend
1968    Description:
1969    
1970    Added a script called ml-makedepend.  This can be used in makefiles
1971    for Unix' make in a way very similar to the "makedepend" command for
1972    C.
1973    
1974    The script internally uses function CM.sources.
1975    
1976    Synopsis:
1977    
1978        ml-makedepend [-f makefile] cmfile targetname
1979    
1980    The default for the makefile is "makefile" (or "Makefile" should
1981    "makefile" not exist).
1982    
1983    ml-makedepend adds a cmfile/targetname-specific section to this
1984    makefile (after removing the previous version of this section).  The
1985    section contains a single dependency specification with targetname on
1986    the LHS (targetname is an arbitrary name), and a list of files derived
1987    from the cmfile on the RHS.  Some of the files on the RHS are
1988    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
1989    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
1990    path names.  The makefile writer is responsible for making sure that
1991    these variables have correct at the time "make" is invoked.
1992    
1993    ----------------------------------------------------------------------
1994    Name: Matthias Blume
1995    Date: 2000/07/22 23:30:00 JST
1996    Tag: blume-20000722-urlupdate
1997    Description:
1998    
1999    Changed BOOT and config/srcarchiveurl to point to BL server:
2000    
2001        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2002    
2003    ----------------------------------------------------------------------
2004    Name: Matthias Blume
2005    Date: 2000/07/18 18:00:00 JST
2006    Tag: blume-20000718-Version_110_29
2007    Description:
2008    
2009    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2010    
2011    2. Updated config/version to 110.29
2012    
2013    3. Updated config/srcarchiveurl
2014    
2015    3. New boot files!
2016       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2017    
2018    ----------------------------------------------------------------------
2019    Name: Matthias Blume
2020    Date: 2000/07/11 13:58:00 JST
2021    Tag: blume-20000711-doctypo
2022    Description:
2023    
2024    Fixed a few typos in CM manual.
2025    
2026    ----------------------------------------------------------------------
2027    Name: Allen Leung
2028    Date: 2000/06/15 00:38:00
2029    Tag: leunga-20000704-sparc-x86
2030    
2031    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2032    2. fix to x86 RET bug [found by Dan Grossman]
2033    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2034    
2035       Affects c-- and moby only
2036    
2037    ----------------------------------------------------------------------
2038    Name: Matthias Blume
2039    Date: 2000/07/04 15:26:00
2040    Tag: blume-20000704-trigger
2041    Description:
2042    
2043    1. Improvements to CM manual.
2044    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2045       of getting a back-trace.  The function, when called, raises an
2046       internal exception which explicitly carries the full back-trace history,
2047       so it is unaffected by any intervening handle-raise pairs ("trivial"
2048       or not).  The interactive loop will print that history once it arrives
2049       at top level.
2050       Short of having all exceptions implicitly carry the full history, the
2051       recommended way of using this facility is:
2052         - compile your program with instrumentation "on"
2053         - run it, when it raises an exception, look at the history
2054         - if the history is "cut off" because of some handler, go and modify
2055           your program so that it explicitly calls BTrace.trigger
2056         - recompile (still instrumented), and rerun; look at the full history
2057    
2058    ----------------------------------------------------------------------
2059    Name: Matthias Blume
2060    Date: 2000/07/03 15:36:00 JST
2061    Tag: blume-20000702-manual
2062    Description:
2063    
2064    Small corrections and updates to CM manual.
2065    
2066    ----------------------------------------------------------------------
2067    Name: Matthias Blume
2068    Date: 2000/06/29 16:04:00 JST
2069    Tag: blume-20000629-yacctool
2070    Description:
2071    
2072    Changes:
2073    
2074    1. Class "mlyacc" now takes separate arguments to pass options to
2075       generated .sml- and .sig-files independently.
2076    2. Corresponding CM manual updates.
2077    3. BTrace module now also reports call sites.  (However, for loop clusters
2078       it only shows from where the cluster was entered.)  There are associated
2079       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2080    
2081    ----------------------------------------------------------------------
2082    Name: Matthias Blume
2083    Date: 2000/06/27 16:51:00 JST
2084    Tag: blume-20000627-noweb
2085    Description:
2086    
2087    Changes:
2088    
2089     1. Implemented "subdir" and "witness" options for noweb tool.
2090        This caused some slight internal changes in CM's tool implementation.
2091     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2092        some remaining issues from earlier path anchor changes.
2093     3. Updated CM manual accordingly.
2094    
2095     4. Changed implementation of back-tracing so that I now consider it
2096        ready for prime-time.
2097    
2098        In particular, you don't have to explicitly trigger the back-trace
2099        anymore.  Instead, if you are running BTrace-instrumented code and
2100        there is an uncaught exception (regardless of whether or not it was
2101        raised in instrumented code), the top-level evalloop will print
2102        the back-trace.
2103    
2104        Features:
2105    
2106          - Instrumented and uninstrumented code work together seemlessly.
2107            (Of course, uninstrumented code is never mentioned in actual
2108             back-traces.)
2109    
2110          - Asymptotic time- and space-complexity of instrumented code is
2111            equal to that of uninstrumented code.  (This means that
2112            tail-recursion is preserved by the instrumentation phase.)
2113    
2114          - Modules whose code has been instrumented in different sessions
2115            work together without problem.
2116    
2117          - There is no penalty whatsoever on uninstrumented code.
2118    
2119          - There is no penalty on "raise" expressions, even in
2120            instrumented code.
2121    
2122        A potential bug (or perhaps it is a feature, too):
2123    
2124          A back-trace reaches no further than the outermost instrumented
2125          non-trivial "raise".  Here, a "trivial" raise is one that is the
2126          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2127    
2128               <exp> handle e => raise e
2129    
2130          and even
2131    
2132               <exp> handle Foo => raise Bar
2133    
2134          and, of course, through
2135    
2136               <exp> handle Foo => ...
2137    
2138         if the exception was not Foo.
2139    
2140         Back-traces always reach right through any un-instrumented code
2141         including any of its "handle" expressions, trivial or not.
2142    
2143       To try this out, do the following:
2144    
2145         - Erase all existing binfiles for your program.
2146           (You may keep binfiles for those modules where you think you
2147            definitely don't need back-tracing.)
2148         - Turn on back-trace instrumentation:
2149              SMLofNJ.Internals.BTrace.mode (SOME true);
2150         - Recompile your program.  (I.e., run "CM.make" or "use".)
2151         - You may now turn instrumentation off again (if you want):
2152              SMLofNJ.Internals.BTrace.mode (SOME false);
2153         - Run your program as usual.  If it raises an exception that
2154           reaches the interactive toplevel, then a back-trace will
2155           automatically be printed.  After that, the toplevel loop
2156           will print the exception history as usual.
2157    
2158    ----------------------------------------------------------------------
2159    Name: Matthias Blume
2160    Date: 2000/06/26 09:56:46 JST
2161    Tag: blume-20000626-setup
2162    Description:
2163    
2164    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2165          ML code before and after compiling a file (e.g., to set compiler
2166          flags)
2167    
2168    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2169              - associated changes to btrace.sml (BTrace instrumentation pass)
2170              - cleaner implementation of btimp.sml (BTrace tracing and report
2171                module)
2172    
2173    CM manual: * new path encoding documented
2174               * description of setup-parameter to "sml" added
2175    
2176    The biggest user-visible change to back-tracing is that it is no
2177    longer necessary to compile all traced modules within the same
2178    session.  (This was a real limitation.)
2179    
2180    ----------------------------------------------------------------------
2181    Name: Matthias Blume
2182    Date: 2000/06/24 12:40:00 JST
2183    Tag: blume-20000624-startup
2184    Description:
2185    
2186    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2187    bit too often -- to put it mildly. :)
2188    
2189    ----------------------------------------------------------------------
2190    Name: Matthias Blume
2191    Date: 2000/06/23 18:20:00 JST
2192    Tag: blume-20000623-btrace
2193    Description:
2194    
2195    This updates adds a backtrace facility to aid programmers in debugging
2196    their programs.  This involves the following changes:
2197    
2198    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2199       keeping track of the current call stack.  When programs are compiled
2200       in a special mode, the compiler will insert calls to these hooks
2201       into the user program.
2202       "Hook" means that it is possible for different implementations of
2203       back-tracing to register themselves (at different times).
2204    
2205    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2206       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2207       It can be turned on using this call:
2208         SMLofNJ.Internals.BTrace.mode (SOME true);
2209       Turning it off again:
2210         SMLofNJ.Internals.BTrace.mode (SOME false);
2211       Querying the current status:
2212         SMLofNJ.Internals.BTrace.mode NONE;
2213       Annotated programs are about twice as big as normal ones, and they
2214       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2215       where all hooks do nothing).  The slowdown with a plugin that is
2216       actually useful (such as the one supplied by default) is even greater,
2217       but in the case of the default plugin it is still only an constant
2218       factor (amortized).
2219    
2220    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2221       with a sub-structure BTrace for controlling back-tracing.  In particular,
2222       the above-mentioned function "mode" controls whether the annotation
2223       phase is invoked by the compiler.  Another important function is
2224       "trigger": when called it aborts the current execution and causes
2225       the top-level loop to print a full back-trace.
2226    
2227    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2228       for back-tracing.  It keeps track of the dynamic call stack and in
2229       addition to that it keeps a partial history at each "level" of that
2230       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2231       d and b (at separate times, dynamically), then the report will show:
2232    
2233       GOTO   d
2234             /c
2235       GOTO  \b
2236       CALL   a
2237    
2238       This shows that there was an initial non-tail call of a, then a
2239       tail-call to b or c, looping behavior in a cluster of functions that
2240       consist of b and c, and then a goto from that cluster (i.e., either from
2241       b or from c) to d.
2242    
2243       Note that (depending on the user program) the amount of information
2244       that the back-trace module has to keep track of at each level is bounded
2245       by a constant.  Thus, the whole implementation has the same asymptotical
2246       complexity as the original program (both in space and in time).
2247    
2248    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2249       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2250       which is raised by the "trigger" function mentioned above.
2251    
2252    Notes on usage:
2253    
2254    - Annotated code works well together with unannotated code:
2255    Unannotated calls simply do not show up at all in the backtrace.
2256    
2257    - It is not a good idea to let modules that were annotated during
2258    different sessions run at the same time.  This is because the compiler
2259    chooses small integers to identify individual functions, and there
2260    will be clashes if different modules were compiled in separate sessions.
2261    (Nothing will crash, and you will even be told about the clashes, but
2262    back-trace information will in general not be useful.)
2263    
2264    - Back-tracing can be confused by callcc and capture.
2265    
2266    - The only way of getting a back-trace right now is to explicitly
2267    invoke the "trigger" function from your user program.  Eventually, we
2268    should make every exception carry back-trace information (if
2269    available).  But since this creates more overhead at "raise"-time
2270    (similar to the current exnHistory overhead), I have not yet
2271    implemented this.  (The implementation will be rather easy.)  With
2272    exceptions carrying back-trace information, this facility will be even
2273    more useful because users don't need to modify their programs...
2274    
2275    - While it is possible to compile the compiler with back-trace
2276    annotations turned on (I did it to get some confidence in
2277    correctness), you must make absolutely sure that core.sml and
2278    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2279    be compiled with annotation because there is no core access yet, but
2280    if you compile btimp.sml with annotation, then the system will go into
2281    an infinite recursion and crash.)
2282    Since CM currently does not know about BTrace, the only way to turn
2283    annotations on and off for different modules of the compiler is to
2284    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2285    this is awkward and clumsy.
2286    
2287    Sample sessions:
2288    
2289    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2290    - SMLofNJ.Internals.BTrace.mode (SOME true);
2291    [autoloading]
2292    [autoloading done]
2293    val it = false : bool
2294    - structure X = struct
2295    -     fun main n = let
2296    -         fun a (x, 0) = d x
2297    -           | a (x, n) = b (x, n - 1)
2298    -         and b (x, n) = c (x, n)
2299    -         and c (x, n) = a (x, n)
2300    -         and d x = e (x, 3)
2301    -         and e (x, 0) = f x
2302    -           | e (x, n) = e (x, n - 1)
2303    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2304    -           | f n = n * g (n - 1)
2305    -         and g n = a (n, 3)
2306    -     in
2307    -         f n
2308    -     end
2309    - end;
2310    structure X : sig val main : int -> int end
2311    - X.main 3;
2312    *** BACK-TRACE ***
2313    GOTO   stdIn:4.2-13.20: X.main[2].f
2314    GOTO-( stdIn:4.2-13.20: X.main[2].e
2315    GOTO   stdIn:4.2-13.20: X.main[2].d
2316         / stdIn:4.2-13.20: X.main[2].a
2317         | stdIn:4.2-13.20: X.main[2].b
2318    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2319    CALL   stdIn:4.2-13.20: X.main[2].g
2320    GOTO   stdIn:4.2-13.20: X.main[2].f
2321    GOTO-( stdIn:4.2-13.20: X.main[2].e
2322    GOTO   stdIn:4.2-13.20: X.main[2].d
2323         / stdIn:4.2-13.20: X.main[2].a
2324         | stdIn:4.2-13.20: X.main[2].b
2325    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2326    CALL   stdIn:4.2-13.20: X.main[2].g
2327    GOTO   stdIn:4.2-13.20: X.main[2].f
2328    GOTO-( stdIn:4.2-13.20: X.main[2].e
2329    GOTO   stdIn:4.2-13.20: X.main[2].d
2330         / stdIn:4.2-13.20: X.main[2].a
2331         | stdIn:4.2-13.20: X.main[2].b
2332    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2333    CALL   stdIn:4.2-13.20: X.main[2].g
2334    GOTO   stdIn:4.2-13.20: X.main[2].f
2335    CALL   stdIn:2.15-17.4: X.main[2]
2336    -
2337    
2338    (Note that because of a FLINt bug the above code currently does not
2339    compile without BTrace turned on.)
2340    
2341    Here is another example, using my modified Tiger compiler:
2342    
2343    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2344    - SMLofNJ.Internals.BTrace.mode (SOME true);
2345    [autoloading]
2346    [autoloading done]
2347    val it = false : bool
2348    - CM.make "sources.cm";
2349    [autoloading]
2350    ...
2351    [autoloading done]
2352    [scanning sources.cm]
2353    [parsing (sources.cm):parse.sml]
2354    [creating directory CM/SKEL ...]
2355    [parsing (sources.cm):tiger.lex.sml]
2356    ...
2357    [wrote CM/sparc-unix/semant.sml]
2358    [compiling (sources.cm):main.sml]
2359    [wrote CM/sparc-unix/main.sml]
2360    [New bindings added.]
2361    val it = true : bool
2362    - Main.compile ("../testcases/merge.tig", "foo.out");
2363    *** BACK-TRACE ***
2364    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2365    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2366    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2367    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2368    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2369    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2370    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2371         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2372    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2373    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2374    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2375    CALL   main.sml:1.18-118.4: Main.compile[2]
2376    -
2377    
2378    ----------------------------------------------------------------------
2379    Name: Matthias Blumen
2380    Date: 2000/06/21 18:00:00 JST
2381    Tag: blume-20000621-manual
2382    Description:
2383    
2384    CM manual update: Path environments documented.
2385    
2386    ----------------------------------------------------------------------
2387    Name: Matthias Blume
2388    Date: 2000/06/19 13:40:00
2389    Tag: blume-20000619-manual
2390    Description:
2391    
2392    CM manual and system/README update.  This only covers the fact that
2393    there are no more implicit anchors.  (Path environments and the "bind"
2394    option to "cm" have yet to be documented.)
2395    
2396    ----------------------------------------------------------------------
2397    Name: Matthias Blume
2398    Date: 2000/06/19 11:05:00 JST
2399    Tag: blume-20000619-chdir-bugfix
2400    Description:
2401    
2402    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2403    
2404    ----------------------------------------------------------------------
2405    Name: Matthias Blume
2406    Date: 2000/06/18 22:00:10 JST
2407    Tag: blume-20000618-implicit-anchors-really-gone
2408    Description:
2409    
2410    I updates the previous HISTORY entry where I forgot to mention that
2411    implicit anchors are no longer with us.
2412    
2413    The current update also gets rid of the (now useless) controller
2414    CM.Control.implicit_anchors.
2415    
2416    ----------------------------------------------------------------------
2417    Name: Matthias Blume
2418    Date: 2000/06/16 17:30:00 JST
2419    Tag: blume-20000616-anchorenv
2420    Description:
2421    
2422    This patch implements the long anticipated (just kidding :) "anchor
2423    environment" mechanism.  In the course of doing this, I also
2424    re-implemented CM's internal "SrcPath" module from scratch.  The new
2425    one should be more robust in certain boundary cases.  In any case, it
2426    is a lot cleaner than its predecessor (IMHO).
2427    
2428    This time, although there is yet another boot file format change, I
2429    kept the unpickler backward-compatible.  As a result, no new bootfiles
2430    are necessary and bootstrapping is straightforward.  (You cannot read
2431    new bootfiles into an old system, but the other way around is no
2432    problem.)
2433    
2434    Visible changes:
2435    
2436    ** 0. Implicit path anchors (without the leading $-symbol) are no
2437    longer recognized at all. This means that such path names are not
2438    illegal either.  For example, the name basis.cm simply refers to a
2439    local file called "basis.cm" (i.e, the name is an ordinary path
2440    relative to .cm-files directory).  Or, to put it differently, only
2441    names that start with $ are anchored paths.
2442    
2443    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2444    vanished.
2445    
2446    John (Reppy) had critizised this as soon as I originally proposed and
2447    implemented it, but at that time I did not really deeply believe
2448    him. :) Now I came full-circle because I need the $<singlearc> syntax
2449    in another place where it cannot be seen as an abbreviation for
2450    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2451    seems to mean (i.e., it "expands" into the corresponding anchor
2452    value).
2453    
2454    However, when paths are used as members in CM description files, it
2455    continues to be true that there must be at least another arc after the
2456    anchor.  This is now enforced separately during semantic analysis
2457    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2458    
2459    ** 2. The "cm" class now accepts an option "bind".  The option's value
2460    is a sub-option list of precisely two items -- one labeled "anchor"
2461    and the other one labeled "value".  As you might expect, "anchor" is
2462    used to specify an anchor name to be bound, and "value" specifies what
2463    the anchor is being bound to.
2464    
2465    The value must be a directory name and can be given in either standard
2466    syntax (including the possibility that it is itself an anchored path)
2467    or native syntax.
2468    
2469    Examples:
2470    
2471       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2472       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2473    
2474    and so on.
2475    
2476    The meaning of this is that the .cm-file will be processed with an
2477    augmented anchor environment where the given anchor(s) is/are bound to
2478    the given values(s).
2479    
2480    The rationale for having this feature is this: Suppose you are trying
2481    to use two different (already stable) libraries a.cm and b.cm (that
2482    you perhaps didn't write yourself).  Further, suppose each of these
2483    two libraries internally uses its own auxiliary library $aux/lib.cm.
2484    Normally you would now have a problem because the anchor "lib" can not
2485    be bound to more than one value globally.  Therefore, the project that
2486    uses both a.cm and b.cm must locally redirect the anchor to some other
2487    place:
2488    
2489       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2490       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2491    
2492    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2493    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2494    
2495    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2496    you when you do so at the time of CM.stabilize).  Therefore, you can
2497    also use an anchored path as the value:
2498    
2499      a.cm (bind:(anchor:lib value:$a-lib))
2500      b.cm (bind:(anchor:lib value:$b-lib))
2501    
2502    Now you can globally configure (using the usual CM.Anchor.anchor or
2503    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2504    itself is always locally bound, setting it globally is no longer
2505    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2506    can still be used as a global anchor for separate purposes.  As a
2507    matter of fact, one can locally define "lib" in terms of a global
2508    "lib":
2509    
2510      a.cm (bind:(anchor:lib value:$lib/a))
2511      b.cm (bind:(anchor:lib value:$lib/b))
2512    
2513    ** 3: The encoding of path names has changed.  This affects the way
2514    path names are shown in CM's progress report and also the internal
2515    protocol encoding used for parallel make.
2516    
2517    The encoding now uses one or more ':'-separated segments.  Each
2518    segments corresponds to a file that has been specified relative to the
2519    file given by its preceding segment.  The first segment is either
2520    relative to the CWD, absolute, or anchored.  Each segment itself is
2521    basically a Unix pathname; all segments but the first are relative.
2522    
2523    Example:
2524    
2525       $foo/bar/baz.cm:a/b/c.sml
2526    
2527    This path denotes the file bar/a/b/c.sml relative to the directory
2528    denoted by anchor "foo".  Notice that the encoding also includes
2529    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2530    paths are resolved relative to the .cm-files directory, so baz.cm must
2531    be ignored to get the "real" pathname.
2532    
2533    To make this fact more obvious, CM puts the names of such "virtual
2534    arcs" into parentheses when they appear in progress reports. (No
2535    parentheses will appear in the internal protocol encoding.)  Thus,
2536    what you really see is:
2537    
2538      $foo/bar/(baz.cm):a/b/c.sml
2539    
2540    I find this notation to be much more informative than before.
2541    
2542    Another new feature of the encoding is that special characters
2543    including parentheses, colons, (back)slashes, and white space are
2544    written as \ddd (where ddd is the decimal encoding of the character).
2545    
2546    *** The CM manual still needs to be updated.
2547    
2548    ----------------------------------------------------------------------
2549    Name: Allen Leung
2550    Date: 2000/06/15 00:38:00
2551    Tag: leunga-20000615-x86-peephole
2552    
2553    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2554    
2555    ----------------------------------------------------------------------
2556    Name: Matthias Blume
2557    Date: 2000/06/12 11:40:00
2558    Tag: blume-20000612-parmakefix
2559    Description:
2560    
2561    More cleanup after changing the file naming scheme: This time I
2562    repaired the parallel make mechanism for CMB.make which I broke earlier.
2563    
2564    ----------------------------------------------------------------------
2565    Name: Allen Leung
2566    Date: 2000/06/09 01:25:00
2567    Tag: leunga-20000609-various
2568    
2569    None of these things should affect normal SML/NJ operations
2570    
2571    1. Peephole improvements provided by Fermin (c--)
2572    2. New annotation DEFUSE for adding extra dependence (moby)
2573    3. New X86 LOCK instructions (moby)
2574    4. New machine description language for reservation tables (scheduling)
2575    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2576       trees etc.)
2577    6. I've changed the CM files so that they can work with versions
2578       110.0.6, 110.25 and 110.28
2579    
2580    ----------------------------------------------------------------------
2581    Name: Matthias Blume
2582    Date: 2000/06/09 12:40:00
2583    Tag: blume-20000609-log
2584    Description:
2585    
2586    - Removed all(?) remaining RCS Log entries from sources.
2587    
2588    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2589      anchored paths).
2590    
2591    ----------------------------------------------------------------------
2592    Name: Matthias Blume
2593    Date: 2000/06/07 17:00:00 JST
2594    Tag: blume-20000607-no-implicit-anchors
2595    Description:
2596    
2597    1. This update changes the default setting for
2598    CM.Control.implicit_anchors from true to false.  This means that
2599    implicit anchors are no longer permitted by default.  I also tried to
2600    make sure that nothing else still relies on implicit anchors.
2601    (This is the next step on the schedule towards a CM that does not even
2602    have the notion of implicit anchors anymore.)
2603    
2604    2. More CM manual updates.
2605    
2606    3. I managed to track down and fix the pickling bug I mentioned last
2607    time.  Because of the previously existing workaround, this entails no
2608    immediate practical changes.
2609    
2610    ----------------------------------------------------------------------
2611    Name: Matthias Blume
2612    Date: 2000/06/06 11:15:00 JST
2613    Tag: blume-20000606-lazierpickle
2614    Description:
2615    
2616    !!!! NEW BOOT FILES !!!!
2617    
2618    * The main purpose of this update is to make library pickles lazier in
2619    order to reduce the initial space penalty for autoloading a library.
2620    As a result, it is now possible to have $smlnj/compiler.cm
2621    pre-registered.  This should take care of the many complaints or
2622    inquiries about missing structure Compiler.  This required changes to
2623    CM's internal data structures and small tweaks to some algorithms.
2624    
2625    As a neat additional effect, it is no longer necessary (for the sake
2626    of lean heap image files) to distinguish between a "minimal" CM and a
2627    "full" CM.  Now, there is only one CM (i.e., the "full" version:
2628    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2629    interactive top level. ($smlnj/cm/minimal.cm is gone.)
2630    
2631    To make the life of compiler-hackers easier, "makeml" now also
2632    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
2633    words, after you bootstrap a new sml for the first time, you will not
2634    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
2635    around you will still have to do it, though.)
2636    
2637    * A second change consists of major updates to the CM manual.  There
2638    are now several appendices with summary information and also a full
2639    specification of the CM description file syntax.
2640    
2641    * In directory src/system I added the script "allcross".  This script
2642    invokes sml and cross-compiles the compiler for all supported
2643    architectures.  (Useful when providing a new set of boot files.)
2644    
2645    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
2646    added a small tweak to pickle-util.sml to work around this problem,
2647    but it is not a proper fix yet.  I will investigate further.  (The
2648    effect of the bug was an inflation of library pickle size.)
2649    
2650    * Version number increased to 110.28.1 (to avoid compatibility problems).
2651    
2652    ----------------------------------------------------------------------
2653    Name: Allen Leung
2654    Date: 2000/05/25 17:28 EDT
2655    Tag: leunga-20000525-ra
2656    Description:
2657    
2658      Fixed a bug in freezing phase of the register allocator.
2659    
2660    ----------------------------------------------------------------------
2661  Name: Allen Leung  Name: Allen Leung
2662  Date: 2000/05/15 22:53 EDT  Date: 2000/05/15 22:53 EDT
2663  Tag: leunga-20000515-alpha-x86-ra  Tag: leunga-20000515-alpha-x86-ra
# Line 494  Line 3140 
3140    
3141  3.  Assembly  3.  Assembly
3142    
3143      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
3144      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
3145      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
3146    
# Line 517  Line 3163 
3163    
3164  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
3165  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
3166  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
3167  legal surface-syntax symbol).  legal surface-syntax symbol).
3168    
3169  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 527  Line 3173 
3173  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
3174    
3175  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3176  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
3177  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
3178  more details.  more details.
3179    
# Line 642  Line 3288 
3288     (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
3289     used).     used).
3290    
3291     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3292     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3293     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3294    
3295     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 655  Line 3301 
3301    
3302     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3303    
3304     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3305     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3306    
3307  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 686  Line 3332 
3332       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3333       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3334       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
3335       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3336       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3337       Dave's hands. :)       Dave's hands. :)
3338    
# Line 789  Line 3435 
3435    
3436       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3437       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3438       testl is perferable to andl.       testl is preferable to andl.
3439    
3440  7. RA (x86 only)  7. RA (x86 only)
3441    
# Line 971  Line 3617 
3617    
3618  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3619  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3620  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
3621  explanation.  explanation.
3622    
3623  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3624  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3625  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3626  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 1018  Line 3664 
3664  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
3665  <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,
3666  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
3667  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3668  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3669  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3670    
# Line 1068  Line 3714 
3714    it from that remote directory.    it from that remote directory.
3715    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3716    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3717    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3718    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3719    
3720    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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