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revision 589, Fri Mar 31 16:14:36 2000 UTC revision 1044, Mon Jan 28 21:36:08 2002 UTC
# Line 8  Line 8 
8  The form of an entry should be:  The form of an entry should be:
9    
10  Name:  Name:
11  Date:  Date: yyyy/mm/dd
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15  ----------------------------------------------------------------------  ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2002/01/28
18    Tag: blume-20020128-allocParam
19    Description:
20    
21    John Reppy:  Changes c-calls API to accept client-callback for
22    allocating extra stack space.
23    me: Corresponding changes to mlriscGen (using a dummy argument that
24        does not change the current behavior).
25    
26    ----------------------------------------------------------------------
27    Name: Matthias Blume
28    Date: 2002/01/28 12:00:00
29    Tag: Release_110_38
30    Description:
31    
32    This time for real!!!
33    
34    ----------------------------------------------------------------------
35    Name: Matthias Blume
36    Date: 2002/01/28 10:56:00 EST
37    Tag: blume-20020128-retraction
38    Description:
39    
40    0. Retracted earlier 110.38.  (The Release_110_38 tag has been replaced
41       with blume-Release_110_38-retracted.)
42    
43    1. Fixed a problem with incorrect rounding modes in real64.sml.
44       (Thanks to Andrew Mccreight <andrew.mccreight@yale.edu>.)
45    
46    2. A bug in ml-nlffigen related to the handling of unnamed structs, unions,
47       and enums fixed.  The naming of corresponding ML identifiers should
48       now be consistent again.
49    
50    ----------------------------------------------------------------------
51    Name: Allen Leung
52    Date: 2002/01/27
53    Tag: leunga-20020127-nowhere
54    Description:
55    
56       Added a target called nowhere in the configuration scripts.
57       Enabling this will build the MLRISC 'nowhere' tool (for translating
58       programs with where-clauses into legal SML code) during installation.
59    
60    ----------------------------------------------------------------------
61    Name: Matthias Blume
62    Date: 2002/01/25 21:27:00 EST
63    Tag: blume-Release_110_38-retracted
64    Description:
65    
66    Call it a (working) release!  Version is 110.38. Bootfiles are ready.
67    
68    README will be added later.
69    
70    !!! NOTE:  Re-tagged as blume-Release_110_38-retracted. Original tag
71    (Release_110_38) removed.  Reason: Last-minute bug fixes.
72    
73    ----------------------------------------------------------------------
74    Name: Matthias Blume
75    Date: 2002/01/25
76    Tag: blume-20020125-ffi
77    Description:
78    
79    A large number of tweaks and improvements to ml-nlffi-lib and
80    ml-nlffigen:
81    
82       - ML represenation types have been streamlined
83       - getter and setter functions work with concrete values, not abstract
84         ones where possible
85       - ml-nlffigen command line more flexible (see README file there)
86       - some bugs have been fixed (hopefully)
87    
88    ----------------------------------------------------------------------
89    Name: Lal George
90    Date: 2002/01/24
91    Tag: george-20020124-risc-ra-interface
92    Description:
93    
94       There is a dramatic simplification in the interface to the
95       register allocator for RISC architectures as a result of making
96       parallel copy instructions explicit.
97    
98    ----------------------------------------------------------------------
99    Name: Matthias Blume
100    Date: 2002/01/22
101    Tag: blume-20020122-x86-ccalls
102    Description:
103    
104    Bug fix for c-calls on x86 (having to do with how char- and
105    short-arguments are being handled).
106    
107    ----------------------------------------------------------------------
108    Name: Matthias Blume
109    Date: 2002/01/21
110    Tag: blume-20020121-ff
111    Description:
112    
113    Another day of fiddling with the FFI...
114    
115    1. Bug fix/workaround:  CKIT does not complain about negative array
116       dimensions, so ml-nlffigen has to guard itself against this possibility.
117       (Otherwise a negative dimension would send it into an infinite loop.)
118    
119    2. Some of the abstract types (light objects, light pointers, most "base"
120       types) in structure C are now eqtypes.
121    
122    3. Added constructors and test functions for NULL function pointers.
123    
124    ----------------------------------------------------------------------
125    Name: Matthias Blume
126    Date: 2002/01/18
127    Tag: blume-20020118-ready-for-new-release
128    Description:
129    
130    Made config/srcarchiveurl point to a new place.  (Will provide boot
131    files shortly.)
132    
133    Maybe we christen this to be 110.38?
134    
135    ----------------------------------------------------------------------
136    Name: Matthias Blume
137    Date: 2002/01/18
138    Tag: blume-20020118-more-ffifiddle
139    Description:
140    
141    Today's FFI fiddling:
142    
143      - Provided a structure CGetSet with "convenient" versions of C.Get.* and
144        C.Set.* that use concrete (MLRep.*) arguments and results instead
145        of abstract ones.
146    
147      - Provided word-style bit operations etc. for "int" representation
148        types in MLRep.S<Foo>Bitops where <Foo> ranges over Char, Int, Short,
149        and Long.
150    
151    ----------------------------------------------------------------------
152    Name: Matthias Blume
153    Date: 2002/01/18
154    Tag: blume-20020118-use-x86-fp
155    Description:
156    
157    Now that x86-fast-fp seems to be working, I turned it back on again
158    by default.  (Seems to work fine now, even with the FFI.)
159    
160    Other than that, I added some documentation about the FFI to
161    src/ml-nlffigen/README and updated the FFI test examples in
162    src/ml-nlffi-lib/Tests/*.
163    
164    ----------------------------------------------------------------------
165    Name: Allen Leung
166    Date: 2002/01/17
167    Tag: leunga-20020117-x86-fast-fp-call
168    Description:
169    
170       1. Fixed a problem with handling return fp values when x86's fast fp
171          mode is turned on.
172    
173       2. Minor pretty printing fix for cellset.  Print %st(0) as %st(0) instead
174          of %f32.
175    
176       3. Added a constructor INT32lit to the ast of MLRISC tools.
177    
178    ----------------------------------------------------------------------
179    Name: Matthias Blume
180    Date: 2002/01/16
181    Tag: blume-20020116-ffifiddle
182    Description:
183    
184    More fiddling with the FFI interface:
185    
186     - Make constness 'c instead of rw wherever possible.  This eliminates
187       the need for certain explicit coercions.  (However, due to ML's
188       value polymorphism, there will still be many cases where explicit
189       coercions are necessary.  Phantom types are not the whole answer
190       to modeling a subtyping relationship in ML.)
191    
192     - ro/rw coersions for pointers added.  (Avoids the detour through */&.)
193    
194     - "printf" test example added to src/ml-nlffi-lib/Tests.  (Demonstrates
195       clumsy workaround for varargs problem.)
196    
197    ----------------------------------------------------------------------
198    Name: Lal George
199    Date: 2002/01/15
200    Tag: <none>
201    Description:
202    
203    1. Since COPY instructions are no longer native to the architecture,
204       a generic functor can be used to implement the expandCopies function.
205    
206    2. Allowed EXPORT and IMPORT pseudo-op declarations to appear inside a
207       TEXT segment.
208    
209    ----------------------------------------------------------------------
210    Name: Matthias Blume
211    Date: 2002/01/15
212    Tag: blume-20020115-ffiupdates
213    Description:
214    
215    1. Fix for bug resulting in single-precision float values being returned
216       incorrectly from FFI calls.
217    
218    2. Small modifications to C FFI API:
219    
220        - memory-allocation routines return straight objects (no options)
221          and raise an exception in out-of-memory situations
222        - unsafe extensions to cast between function pointers and pointers
223          from/to ints
224        - added structure C_Debug as an alternative to structure C where
225          pointer-dereferencing (|*| and |*!) always check for null-pointers
226        - added open_lib' to DynLinkage;  open_lib' works like open_lib
227          but also takes a (possibly empty) list of existing library handles
228          that the current library depends on
229    
230    ----------------------------------------------------------------------
231    Name: Matthias Blume
232    Date: 2002/01/10
233    Tag: blume-20020110-newffigen
234    Description:
235    
236    1. Updates to portable graph code.
237    
238    2. Major update to ml-nlffigen and ml-nlffi-lib.  Things are much
239       more scalable now so that even huge interfaces such as the one
240       for GTK compile in finite time and space. :-)
241       See src/ml-nlffigen/README for details on what's new.
242    
243    ----------------------------------------------------------------------
244    Name: Lal George
245    Date: 2001/01/09 14:31:35 EST 2002
246    Tag: george-20011206-rm-native-copy
247    Description:
248    
249            Removed the native COPY and FCOPY instructions
250            from all the architectures and replaced it with the
251            explicit COPY instruction from the previous commit.
252    
253            It is now possible to simplify many of the optimizations
254            modules that manipulate copies. This has not been
255            done in this change.
256    
257    ----------------------------------------------------------------------
258    Name: Lal George
259    Date: 2001/12/06 16:50:13 EST 2001
260    Tag: george-20011206-mlrisc-instruction
261    Description:
262    
263    Changed the representation of instructions from being fully abstract
264    to being partially concrete. That is to say:
265    
266      from
267            type instruction
268    
269      to
270            type instr                              (* machine instruction *)
271    
272            datatype instruction =
273                LIVE of {regs: C.cellset, spilled: C.cellset}
274              | KILL of {regs: C.cellset, spilled: C.cellset}
275              | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
276              | ANNOTATION of {i: instruction, a: Annotations.annotation}
277              | INSTR of instr
278    
279    This makes the handling of certain special instructions that appear on
280    all architectures easier and uniform.
281    
282    LIVE and KILL say that a list of registers are live or killed at the
283    program point where they appear. No spill code is generated when an
284    element of the 'regs' field is spilled, but the register is moved to
285    the 'spilled' (which is present, more for debugging than anything else).
286    
287    LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
288    We used to generate:
289    
290            DEFFREG f1
291            f1 := f2 + f3
292            trapb
293    
294    but now generate:
295    
296            f1 := f2 + f3
297            trapb
298            LIVE {regs=[f1,f2,f3], spilled=[]}
299    
300    Furthermore, the DEFFREG (hack) required that all floating point instruction
301    use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
302    defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
303    in a cleaner alpha implementation. (Hopefully, intel will not get rid of
304    this architecture).
305    
306    COPYXXX is intended to replace the parallel COPY and FCOPY  available on
307    all the architectures. This will result in further simplification of the
308    register allocator that must be aware of them for coalescing purposes, and
309    will also simplify certain aspects of the machine description that provides
310    callbacks related to parallel copies.
311    
312    ANNOTATION should be obvious, and now INSTR represents the honest to God
313    machine instruction set!
314    
315    The <arch>/instructions/<arch>Instr.sml files define certain utility
316    functions for making porting easier -- essentially converting upper case
317    to lower case. All machine instructions (of type instr) are in upper case,
318    and the lower case form generates an MLRISC instruction. For example on
319    the alpha we have:
320    
321      datatype instr =
322         LDA of {r:cell, b:cell, d:operand}
323       | ...
324    
325      val lda : {r:cell, b:cell, d:operand} -> instruction
326        ...
327    
328    where lda is just (INSTR o LDA), etc.
329    
330    ----------------------------------------------------------------------
331    Name: Matthias Blume
332    Date: 2001/11/22 21:40:00 EST
333    Tag: Release_110_37
334    Description:
335    
336    Release 110.37.  This time for real.
337    
338    ----------------------------------------------------------------------
339    Name: Matthias Blume
340    Date: 2001/11/21 16:35:00 EST
341    Tag: blume-20011121-foot-in-mouth
342    Description:
343    
344    Removed the "Release_110_37" tag because of a serious bug.
345    This will be re-tagged once the bug is fixed.
346    
347    ----------------------------------------------------------------------
348    Name: Matthias Blume
349    Date: 2001/11/21 16:14:00 EST
350    Tag: blume-20011121-forgottenfile
351    Description:
352    
353    Forgot to add a file.  (Just a .tex-file -- part of
354    the CM manual source.)
355    
356    ----------------------------------------------------------------------
357    Name: Matthias Blume
358    Date: 2001/11/21 16:10:00 EST
359    Tag: blume-20011121-invalid_110_37
360    Description:
361    
362    Note: I removed the original tag "Release_110_37" from this commit
363          because we found a serious bug in all non-x86 backends.
364          - Matthias
365    
366    1. Modifications to the SML/NJ code generator and to the runtime system
367       so that code object name strings are directly inserted into code
368       objects at code generation time.  The only business the runtime system
369       has with this is now to read the name strings on occasions.
370       (The encoding of the name string has also changed somewhat.)
371    
372    2. CM now implements a simple "set calculus" for specifying export lists.
373       In particular, it is now possible to refer to the export lists of
374       other libraries/groups/sources and form unions as well as differences.
375       See the latest CM manual for details.
376    
377    3. An separate notion of "proxy" libraries has again be eliminated from
378       CM's model.  (Proxy libraries are now simply a special case of using
379       the export list calculus.)
380    
381    4. Some of the existing libraries now take advantage of the new set
382       calculus.
383       (Notice that not all libraries have been converted because some
384       of the existing .cm-files are supposed to be backward compatible
385       with 110.0.x.)
386    
387    5. Some cleanup in stand-alone programs.  (Don't use "exnMessage" -- use
388       "General.exnMessage"!  The former relies on a certain hook to be
389       initialized, and that often does not happen in the stand-alone case.)
390    
391    ----------------------------------------------------------------------
392    Name: Lal George
393    Date: 2001/11/21  13:56:18 EST
394    Tag: george-2001121-pseudo-ops
395    Description:
396    
397      Implemented a complete redesign of MLRISC pseudo-ops. Now there
398      ought to never be any question of incompatabilities with
399      pseudo-op syntax expected by host assemblers.
400    
401      For now, only modules supporting GAS syntax are implemented
402      but more should follow, such as MASM, and vendor assembler
403      syntax, e.g. IBM as, Sun as, etc.
404    
405    ----------------------------------------------------------------------
406    Name: Matthias Blume
407    Date: 2001/11/14 11:52:00 EST
408    Tag: blume-20011114-srcname
409    Description:
410    
411    1. Routed the name of the current source file to mlriscgen where it
412       should be directly emitted into the code object.  (This last part
413       is yet to be done.)
414    
415    2. Some cleanup of the pgraph code to make it match the proposal that
416       I put out the other day.  (The proposal notwithstanding, things are
417       still in flux here.)
418    
419    ----------------------------------------------------------------------
420    Name: Lal George
421    Date: 2001/11/14 09:44:04 EST
422    Tag:
423    Description:
424    
425      Fix for a backpatching bug reported by Allen.
426    
427      Because the boundary between short and long span-dependent
428      instructions is +/- 128, there are an astounding number of
429      span-dependent instructions whose size is over estimated.
430    
431      Allen came up with the idea of letting the size of span
432      dependent instructions be non-monotonic, for a maxIter
433      number of times, after which the size must be monotonically
434      increasing.
435    
436      This table shows the number of span-dependent instructions
437      whose size was over-estimated as a function of maxIter, for the
438      file Parse/parse/ml.grm.sml:
439    
440         maxIter            # of instructions:
441            10                      687
442            20                      438
443            30                      198
444            40                        0
445    
446      In compiling the compiler, there is no significant difference in
447      compilation speed between maxIter=10 and maxIter=40. Actually,
448      my measurements showed that maxIter=40 was a tad faster than
449      maxIter=10! Also 96% of the  files in the compiler reach a fix
450      point within 13 iterations, so fixing maxIter at 40, while high,
451      is okay.
452    
453    ----------------------------------------------------------------------
454    Name: Matthias Blume
455    Date: 2001/10/31 15:25:00 EST
456    Tag: blume-20011031-pgraph
457    Description:
458    
459    CKIT:
460    * Changed the "Function" constructor of type Ast.ctype to carry optional
461      argument identifiers.
462    * Changed the return type of TypeUtil.getFunction accordingly.
463    * Type equality ignores the argument names.
464    * TypeUtil.composite tries to preserve argument names but gives up quickly
465      if there is a mismatch.
466    
467    installation script:
468    * attempts to use "curl" if available (unless "wget" is available as well)
469    
470    CM:
471    * has an experimental implementation of "portable graphs" which I will
472      soon propose as an implementation-independent library format
473    * there are also new libraries $/pgraph.cm and $/pgraph-util.cm
474    
475    NLFFI-LIB:
476    * some cleanup (all cosmetic)
477    
478    NLFFIGEN:
479    * temporarily disabled the mechanism that suppresses ML output for
480      C definitions whose identifiers start with an underscore character
481    * generate val bindings for enum constants
482    * user can request that only one style (light or heavy) is being used;
483      default is to use both (command-line arguments: -heavy and -light)
484    * fixed bug in handling of function types involving incomplete pointers
485    * generate ML entry points that take record arguments (i.e., using
486      named arguments) for C functions that have a prototype with named
487      arguments
488      (see changes to CKIT)
489    
490    ----------------------------------------------------------------------
491    Name: Allen Leung
492    Date: 2001/10/27 20:34:00 EDT
493    Tag: leunga-20011027-x86-fast-fp-call
494    Description:
495    
496       Fixed the bug described in blume-20010920-slowfp.
497    
498       The fix involves
499          1. generating FCOPYs in FSTP in ia32-svid
500          2. marking a CALL with the appropriate annotation
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume
504    Date: 2001/10/16 11:32:00 EDT
505    Tag: blume-20011016-netbsd
506    Description:
507    
508    Underscore patch from Chris Richards (fixing problem with compiling
509    runtime system under recent NetBSD).
510    
511    ----------------------------------------------------------------------
512    Name: Allen Leung
513    Date: 2001/10/12 17:18:32 EDT 2001
514    Tag: leung-20011012-x86-printflowgraph
515    Description:
516    
517    X86RA now uses a valid (instead of dummy) PrintFlowgraph module.
518    
519    ----------------------------------------------------------------------
520    Name: Lal George
521    Date: 2001/10/11 23:51:34 EDT
522    Tag: george-20011011-too-many-instrs
523    Description:
524    
525    The representation of a program point never expected to see more
526    than 65536 instructions in a basic block!
527    
528    ----------------------------------------------------------------------
529    Name: Lal George
530    Date: 2001/10/09 09:41:37 EDT
531    Tag: george-20011008-mlrisc-labels
532    Description:
533    
534    Changed the machine description files to support printing of
535    local and global labels in assembly code, based on host assembler
536    conventions.
537    
538    ----------------------------------------------------------------------
539    Name: Matthias Blume
540    Date: 2001/09/25 15:25:00 EDT
541    Tag: blume-20010925-exninfo
542    Description:
543    
544    I provided a non-hook implementation of exnName (at the toplevel) and
545    made the "dummy" implementation of exnMessage (at the toplevel) more
546    useful: if nothing gets "hooked in", then at least you are going to
547    see the exception name and a message indicating why you don't see more.
548    
549    [For the time being, programs that need exnMessage and want to use
550    ml-build should either use General.exnMessage (strongly recommended) or
551    refer to structure General at some other point so that CM sees a
552    static dependency.]
553    
554    [Similar remarks go for "print" and "use":  If you want to use their
555    functionality in stand-alone programs generated by ml-build, then use
556    TextIO.output and Backend.Interact.useFile (from $smlnj/compiler.cm).]
557    
558    ----------------------------------------------------------------------
559    Name: Matthias Blume
560    Date: 2001/09/20 17:28:00 EDT
561    Tag: blume-20010920-slowfp
562    Description:
563    
564    Allen says that x86-fast-fp is not safe yet, so I turned it off again...
565    
566    ----------------------------------------------------------------------
567    Name: Matthias Blume
568    Date: 2001/09/20 17:20:00 EDT
569    Tag: blume-20010920-canonicalpaths
570    Description:
571    
572    0. Updated the BOOT file (something that I forgot to do earlier).
573    
574    1. Small internal change to CM so that it avoids "/../" in filenames
575       as much as possible (but only where it is safe).
576    
577    2. Changed config/_run-sml (resulting in a changed bin/.run-sml) so
578       that arguments that contain delimiters are passed through correctly.
579       This change also means that all "special" arguments of the form
580       @SMLxxx... must come first.
581    
582    3. Changed install script to put relative anchor names for tool commands
583       into pathconfig.
584    
585    ----------------------------------------------------------------------
586    Name: Matthias Blume
587    >>>>>>> 1.169
588    Date: 2001/09/18 15:35:00 EDT
589    Tag: blume-20010918-readme11036
590    Description:
591    
592    Added README files.
593    
594    ----------------------------------------------------------------------
595    Name: Matthias Blume
596    Date: 2001/09/18 11:45:00 EDT
597    Tag: Release_110_36 (retag)
598    Description:
599    
600    Fixed mistake in config/preloads. Retagged as 110.36.
601    
602    ----------------------------------------------------------------------
603    Name: Matthias Blume
604    Date: 2001/09/18 09:40:00 EDT
605    Tag: Release_110_36_orig (tag changed)
606    Description:
607    
608    New version (110.36).  New bootfiles.
609    
610    ----------------------------------------------------------------------
611    Name: Matthias Blume
612    Date: 2001/09/14 16:15:00 EDT
613    Tag: blume-20010914-x86fastfp
614    Description:
615    
616    John committed some changes that Allen made, in particular a (hopefully)
617    correctly working version of the x86-fp module.
618    
619    I changed the default setting of the Control.MLRISC.getFlag "x86-fast-fp"
620    flag to "true".  Everything seems to compile to a fixpoint ok, and
621    "mandelbrot" speeds up by about 15%.
622    
623    ----------------------------------------------------------------------
624    Name: Matthias Blume
625    Date: 2001/09/13 11:20:00 EDT
626    Tag: blume-20010913-minimal
627    Description:
628    
629    1. Stefan Monnier's patch to fix a miscompilation problem that
630       was brought to light by John Reppy's work on Moby.
631    
632    2. Implemented a minimal "structure Compiler" that contains just
633       "version" and "architecture".  The minimal version will be
634       available when the full version is not.  This is for backward-
635       compatibility with code that wants to test Compiler.version.
636    
637    ----------------------------------------------------------------------
638    Name: Matthias Blume
639    Date: 2001/08/28 14:03:00 EDT
640    Tag: blume-20010828-ml-lex
641    Description:
642    
643    Fix for bug 1581, received from Neophytos Michael.
644    
645    ----------------------------------------------------------------------
646    Name: Matthias Blume
647    Date: 2001/08/27 11:20:00 EDT
648    Tag: blume-20010827-readme11035
649    Description:
650    
651    Fleshed out the README file for 110.35.
652    
653    ----------------------------------------------------------------------
654    Name: Matthias Blume
655    Date: 2001/08/24 17:10:00 EDT
656    Tag: Release_110_35
657    Description:
658    
659    New version number (110.35).  New bootfiles.
660    
661    ----------------------------------------------------------------------
662    Name: Lal George
663    Date: 2001/08/24 13:47:18 EDT 2001
664    Tag: george-20010824-MLRISC-graphs
665    Description:
666    
667     removed clusters from MLRISC completely and replaced with graphs.
668    
669    ----------------------------------------------------------------------
670    Name: Matthias Blume
671    Date: 2001/08/23 17:50:00 EDT
672    Tag: blume-20010823-toplevel
673    Description:
674    
675    - some reorganization of the code that implements various kinds of
676      environments in the compiler (static, dynamic, symbolic, combined)
677    - re-implemented the EnvRef module so that evalStream works properly
678      (if the stream contains references to "use", "CM.make", etc.)
679    - cleaned up evalloop.sml and interact.sml (but they need more cleaning)
680    
681    ----------------------------------------------------------------------
682    Name: Matthias Blume
683    Date: 2001/08/20 15:50 EDT
684    Tag: blume20010820-slipup
685    Description:
686    
687    I forgot to commit a few files.  Here they are...
688    
689    ----------------------------------------------------------------------
690    Name: Matthias Blume
691    Date: 2001/08/20 15:35:00 EDT
692    Tag: blume-20010820-debugprof
693    Description:
694    
695    !!!! NEW BOOTFILES !!!!
696    
697    This is another round of reorganizing the compiler sources.  This
698    time the main goal was to factor out all the "instrumentation"
699    passes (for profiling and backtracing) into their own library.
700    The difficulty was to do it in such a way that it does not depend
701    on elaborate.cm but only on elabdata.cm.
702    
703    Therefore there have been further changes to both elaborate.cm and
704    elabdata.cm -- more "generic" things have been moved from the former
705    to the latter.  As a result, I was forced to split the assignment
706    of numbers indicating "primtyc"s into two portions: SML-generic and
707    SML/NJ-specific.  Since it would have been awkward to maintain,
708    I bit the bullet and actually _changed_ the mapping between these
709    numbers and primtycs.  The bottom line of this is that you need
710    a new set of bin- and bootfiles.
711    
712    I have built new bootfiles for all architectures, so doing a fresh
713    checkout and config/install.sh should be all you need.
714    
715    The newly created library's name is
716    
717        $smlnj/viscomp/debugprof.cm
718    
719    and its sources live under
720    
721        src/compiler/DebugProf
722    
723    ----------------------------------------------------------------------
724    Name: Matthias Blume
725    Date: 2001/08/15 17:15:00 EDT
726    Tag: blume-20010815-compreorg
727    Description:
728    
729    This is a first cut at reorganizing the CM libraries that make up the
730    core of the compiler.  The idea is to separate out pieces that could
731    be used independently by tools, e.g., the parser, the typechecker, etc.
732    
733    The current status is a step in this direction, but it is not quite
734    satisfactory yet.  Expect more changes in the future.
735    
736    Here is the current (new) organization...
737    
738        What used to be $smlnj/viscomp/core.cm is now divided into
739        six CM libraries:
740    
741             $smlnj/viscomp/basics.cm
742                           /parser.cm
743                           /elabdata.cm
744                           /elaborate.cm
745                           /execute.cm
746                           /core.cm
747    
748        The CM files for these libraries live under src/system/smlnj/viscomp.
749        All these libraries are proxy libraries that contain precisely
750        one CM library component.  Here are the locations of the components
751        (all within the src/compiler tree):
752    
753             Basics/basics.cm
754             Parse/parser.cm
755             ElabData/elabdata.cm
756             Elaborator/elaborate.cm
757             Execution/execute.cm
758             core.cm
759    
760         [This organization is the same that has been used already
761         for a while for the architecture-specific parts of the visible
762         compiler and for the old version of core.cm.]
763    
764         As you will notice, many source files have been moved from their
765         respective original locations to a new home in one of the above
766         subtrees.
767    
768         The division of labor between the new libraries is the following:
769    
770             basics.cm:
771                - Simple, basic definitions that pertain to many (or all) of
772                  the other libraries.
773             parser.cm:
774                - The SML parser, producing output of type Ast.dec.
775                - The type family for Ast is also defined and exported here.
776             elabdata.cm:
777                - The datatypes that describe input and output of the elaborator.
778                  This includes types, absyn, and static environments.
779             elaborator.cm:
780                - The SML/NJ type checker and elaborator.
781                  This maps an Ast.dec (with a given static environment) to
782                  an Absyn.dec (with a new static environment).
783                - This libraries implements certain modules that used to be
784                  structures as functors (to remove dependencies on FLINT).
785             execute.cm:
786                - Everything having to do with executing binary code objects.
787                - Dynamic environments.
788             core.cm:
789                - SML/NJ-specific instantiations of the elaborator and MLRISC.
790                - Top-level modules.
791                - FLINT (this should eventually become its own library)
792    
793    Notes:
794    
795    I am not 100% happy with the way I separated the elaborator (and its
796    data structures) from FLINT.  Two instances of the same problem:
797    
798        1. Data structures contain certain fields that carry FLINT-specific
799           information.  I hacked around this using exn and the property list
800           module from smlnj-lib.  But the fact that there are middle-end
801           specific fields around at all is a bit annoying.
802    
803        2. The elaborator calculates certain FLINT-related information.  I tried
804           to make this as abstract as I could using functorization, but, again,
805           the fact that the elaborator has to perform calculations on behalf
806           of the middle-end at all is not nice.
807    
808        3. Having to used exn and property lists is unfortunate because it
809           weakens type checking.  The other alternative (parameterizing
810           nearly *everything*) is not appealing, though.
811    
812    I removed the "rebinding =" warning hack because due to the new organization
813    it was awkward to maintain it.  As a result, the compiler now issues some of
814    these warnings when compiling init.cmi during bootstrap compilation. On
815    the plus side, you also get a warning when you do, for example:
816       val op = = Int32.+
817    which was not the case up to now.
818    
819    I placed "assign" and "deref" into the _Core structure so that the
820    code that deals with the "lazy" keyword can find them there.  This
821    removes the need for having access to the primitive environment
822    during elaboration.
823    
824    ----------------------------------------------------------------------
825    Name: Matthias Blume
826    Date: 2001/08/13
827    Tag: blume-20010813-closures
828    Description:
829    
830    This fix was sent to us by Zhong Shao.  It is supposed to improve the
831    performance of certain loops by avoiding needless closure allocation.
832    
833    ----------------------------------------------------------------------
834    Name: Lal George
835    Date: 2001/07/31 10:03:23 EDT 2001
836    Tag: george-20010731-x86-fmalloc
837    Description: Fixed bug in x86 calls
838    
839        There was a bug where call instructions would mysteriously
840        vanish. The call instruction had to be one that returned
841        a floating point value.
842    
843    ----------------------------------------------------------------------
844    Name: Lal George
845    Date: 2001/07/19 16:36:29 EDT 2001
846    Tag: george-20010719-simple-cells
847    Description:
848    
849    I have dramatically simplified the interface for CELLS in MLRISC.
850    
851    In summary, the cells interface is broken up into three parts:
852    
853      1. CellsBasis : CELLS_BASIS
854    
855            CellsBasis is a top level structure and common for all
856            architectures.  it contains the definitions of basic datatypes
857            and utility  functions over these types.
858    
859      2. functor Cells() : CELLS
860    
861            Cells generates an interface for CELLS that incorporates the
862            specific resources on the target architecture, such as the
863            presence of special register classes, their number and size,
864            and various useful substructures.
865    
866      3. <ARCH>CELLS
867    
868            e.g. SparcCells: SPARCCELLS
869    
870            <ARCH>CELLS usually contains additional bindings for special
871            registers  on the architecture, such as:
872    
873                    val r0 : cell           (* register zero *)
874                    val y : cell            (* Y register *)
875                    val psr : cell          (* processor status register *)
876                    ...
877    
878            The structure returned by applying the Cells functor is opened
879            in this interface.
880    
881    The main implication of all this is that the datatypes for cells is
882    split between CellsBasis and CELLS -- a fairly simple change for user
883    code.
884    
885    In the old scheme the CELLS interface had a definitional binding of
886    the form:
887    
888            signature CELLS = sig
889    
890               structure CellsBasis = CellsBasis
891    
892               ...
893    
894            end
895    
896    With all the sharing constraints that goes on in MLRISC, this old
897    design  quickly leads to errors such as:
898    
899            "structure definition spec inside of sharing ... "
900    
901    
902    and appears to require an unacceptable amount of sharing and where
903    constraint hackery.
904    
905    I think this error message (the interaction of definitional specs and
906    sharing) requires more explanation on our web page.
907    
908    ----------------------------------------------------------------------
909    Name: Matthias Blume
910    Date: 2001/07/19 15:00:00 EDT
911    Tag: blume-20010719-libreorg
912    Description:
913    
914    This update puts together a fairly extensive but straightforward change
915    to the way the libraries that implement the interactive system are
916    organized:
917    
918       The biggest change is the elimination of structure Compiler.  As a
919       replacement for this structure, there is now a CM library
920       (known as $smlnj/compiler.cm or $smlnj/compiler/current.cm)
921       that exports all the substructures of the original structure Compiler
922       directly.  So instead of saying Compiler.Foo.bar one now simply
923       says Foo.bar.  (The CM libraries actually export a collection of
924       structures that is richer than the collection of substructures of
925       structure Compiler.)
926    
927       To make the transition smooth, there is a separate library called
928       $smlnj/compiler/compiler.cm which puts together and exports the
929       original structure Compiler (or at least something very close to it).
930    
931       There are five members of the original structure Compiler
932       that are not exported directly but which instead became members
933       of a new structure Backend (described by signature BACKEND).  These are:
934       structure Profile (: PROFILE), structure Compile (: COMPILE), structure
935       Interact (: INTERACT), structure Machine (: MACHINE), and val
936       architecture (: string).
937    
938       Structure Compiler.Version has become structure CompilerVersion.
939    
940       Cross-compilers for alpha32, hppa, ppc, sparc, and x86 are provided
941       by $smlnj/compiler/<arch>.cm where <arch> is alpha32, hppa, ppc, sparc,
942       or x86, respectively.
943       Each of these exports the same frontend structures that
944       $smlnj/compiler.cm exports.  But they do not have a structure Backend
945       and instead export some structure <Arch>Backend where <Arch> is Alpha32,
946       Hppa, PPC, Sparc, or X86, respectively.
947    
948       Library $smlnj/compiler/all.cm exports the union of the exports of
949       $smlnj/compiler/<arch>.cm
950    
951       There are no structures <Arch>Compiler anymore, use
952       $smlnj/compiler/<arch>.cm instead.
953    
954       Library host-compiler-0.cm is gone.  Instead, the internal library
955       that instantiates CM is now called cm0.cm.  Selection of the host
956       compiler (backend) is no longer done here but. (Responsibility for it
957       now lies with $smlnj/compiler/current.cm.  This seems to be more
958       logical.)
959    
960       Many individual files have been moved or renamed.  Some files have
961       been split into multiple files, and some "dead" files have been deleted.
962    
963    Aside from these changes to library organization, there are also changes
964    to the way the code itself is organized:
965    
966       Structure Binfile has been re-implemented in such a way that it no
967       longer needs any knowledge of the compiler.  It exclusively deals
968       with the details of binfile layout.  It no longer invokes the
969       compiler (for the purpose of creating new prospective binfile
970       content), and it no longer has any knowledge of how to interpret
971       pickles.
972    
973       Structure Compile (: COMPILE) has been stripped down to the bare
974       essentials of compilation.  It no longer deals with linking/execution.
975       The interface has been cleaned up considerably.
976    
977       Utility routines for dealing with linking and execution have been
978       moved into their own substructures.
979    
980       (The ultimate goal of these changes is to provide a light-weight
981       binfile loader/linker (at least for, e.g., stable libraries) that
982       does not require CM or the compiler to be present.)
983    
984    CM documentation has been updated to reflect the changes to library
985    organization.
986    
987    ----------------------------------------------------------------------
988    Name: Matthias Blume
989    Date: 2001/07/10 17:30:00 EDT
990    Tag: Release_110_34
991    Description:
992    
993    Minor tweak to 110.34 (re-tagged):
994    
995      - README.html file added to CVS repository
996      - runtime compiles properly under FreeBSD 3.X and 4.X
997    
998    ----------------------------------------------------------------------
999    Name: Matthias Blume
1000    Date: 2001/07/10 17:30:00 EDT
1001    Tag: Release_110_34
1002    Description:
1003    
1004    New version number (110.34). New bootfiles.
1005    
1006    ----------------------------------------------------------------------
1007    Name: Matthias Blume
1008    Date: 2001/07/09 16:00:00 EDT
1009    Tag: blume-20010709-more-varargs
1010    Description:
1011    
1012    I changed the handling of varargs in ml-nlffigen again:
1013    The ellipsis ... will now simply be ignored (with an accompanying warning).
1014    
1015    The immediate effect is that you can actually call a varargs function
1016    from ML -- but you can't actually supply any arguments beyond the ones
1017    specified explicitly.  (For example, you can call printf with its format
1018    string, but you cannot pass additional arguments.)
1019    
1020    This behavior is only marginally more useful than the one before, but
1021    it has the advantage that a function or, more importantly, a function
1022    type never gets dropped on the floor, thus avoiding follow-up problems with
1023    other types that refer to the offending one.
1024    
1025    ----------------------------------------------------------------------
1026    Name: Matthias Blume
1027    Date: 2001/07/09 11:25:00 EDT
1028    Tag: blume-20010709-varargs
1029    Description:
1030    
1031    1. ckit-lib.cm now exports structure Error
1032    2. ml-nlffigen reports occurences of "..." (i.e., varargs function types)
1033       with a warning accompanied by a source location.  Moreover, it
1034       merely skips the offending function or type and proceeds with the
1035       rest of its work.u  As a result, one can safely feed C code containing
1036       "..." to ml-nlffigen.
1037    3. There are some internal improvements to CM, providing slightly
1038       more general string substitutions in the tools subsystem.
1039    
1040    ----------------------------------------------------------------------
1041    Name: Matthias Blume
1042    Date: 2001/06/27 15:10:00 EDT
1043    Tag: blume-20010627-concur
1044    Description:
1045    
1046    Fixed a small bug in CM's handling of parallel compilation.
1047    (You could observe the bug by Control-C-interrupting an ordinary
1048    CMB.make or CM.stabilize and then attaching some compile servers.
1049    The result was that all of a sudden the previously interrupted
1050    compilation would continue on its own.  This was because of
1051    an over-optimization: CM did not bother to clean out certain queues
1052    when no servers were attached "anyway", resulting in the contents
1053    of these queues to grab control when new servers did get attached.)
1054    
1055    There is also another minor update to the CM manual.
1056    
1057    ----------------------------------------------------------------------
1058    Name: Matthias Blume
1059    Date: 2001/06/26 16:15:00 EDT
1060    Tag: blume-20010626-cmdoc
1061    Description:
1062    
1063    Minor typo fixed in CM manual (syntax diagram for libraries).
1064    
1065    ----------------------------------------------------------------------
1066    Name: Matthias Blume
1067    Date: 2001/06/25 22:55:00 EDT
1068    Tag: blume-20010625-x86pc
1069    Description:
1070    
1071    Fixed a nasty bug in the X86 assembly code that caused signal
1072    handlers to fail (crash) randomly.
1073    
1074    ----------------------------------------------------------------------
1075    Name: Matthias Blume
1076    Date: 2001/06/25 12:05:00 EDT
1077    Tag: blume-20010625-nlffigen
1078    Description:
1079    
1080    This update fixes a number of minor bugs in ml-nlffigen as reported by
1081    Nick Carter <nbc@andrew.cmu.edu>.
1082    
1083      1. Silly but ok typedefs of the form "typedef void myvoid;" are now accepted.
1084      2. Default names for generated files are now derived from the name of
1085         the C file *without its directory*.  In particular, this causes generated
1086         files to be placed locally even if the C file is in some system directory.
1087      3. Default names for generated signatures and structures are also derived
1088         from the C file name without its directory.  This avoids silly things
1089         like "structure GL/GL".
1090         (Other silly names are still possible because ml-nlffigen does not do
1091          a thorough check of whether generated names are legal ML identifiers.
1092          When in doubt, use command line arguments to force particular names.)
1093    
1094    ----------------------------------------------------------------------
1095    Name: Matthias Blume
1096    Date: 2001/06/21 12:25:00 EDT
1097    Tag: blume-20010621-eXene
1098    Description:
1099    
1100    eXene now compiles and (sort of) works again.
1101    
1102    The library name (for version > 110.33) is $/eXene.cm.
1103    
1104    I also added an new example in src/eXene/examples/nbody.  See the
1105    README file there for details.
1106    
1107    ----------------------------------------------------------------------
1108    Name: Matthias Blume
1109    Date: 2001/06/20 16:40:00 EDT
1110    Tag: blume-20010620-cml
1111    Description:
1112    
1113    CML now compiles and works again.
1114    
1115    Libraries (for version > 110.33):
1116    
1117      $cml/cml.cm            Main CML library.
1118      $cml/basis.cm          CML's version of $/basis.cm.
1119      $cml/cml-internal.cm   Internal helper library.
1120      $cml/core-cml.cm       Internal helper library.
1121      $cml-lib/trace-cml.cm  Tracing facility.
1122      $cml-lib/smlnj-lib.cm  CML's version of $/smlnj-lib.cm
1123    
1124    The installer (config/install.sh) has been taught how to properly
1125    install this stuff.
1126    
1127    ----------------------------------------------------------------------
1128    Name: Matthias Blume
1129    Date: 2001/06/19 17:55:00 EDT
1130    Tag: blume-20010619-instantiate
1131    Description:
1132    
1133    This un-breaks the fix for bug 1432.
1134    (The bug was originally fixed in 110.9 but I broke it again some
1135    time after that.)
1136    
1137    ----------------------------------------------------------------------
1138    Name: Matthias Blume
1139    Date: 2001/06/19 17:25:00 EDT
1140    Tag: blume-20010619-signals
1141    Description:
1142    
1143    This should (hopefully) fix the long-standing signal handling bug.
1144    (The runtime system was constructing a continuation record with an
1145    incorrect descriptor which would cause the GC to drop data on the floor...)
1146    
1147    ----------------------------------------------------------------------
1148    Name: Matthias Blume
1149    Date: 2001/06/15 15:05:00 EDT
1150    Tag: blume-20010615-moresparc
1151    Description:
1152    
1153    Here is a short late-hour update related to Sparc c-calls:
1154    
1155     -- made handling of double-word arguments a bit smarter
1156    
1157     -- instruction selection phase tries to collapse certain clumsily
1158        constructed ML-Trees; typical example:
1159    
1160            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
1161    
1162        This currently has no further impact on SML/NJ since mlriscGen does
1163        not seem to generate such patterns in the first place, and c-calls
1164        (which did generate them in the beginning) has meanwhile been fixed
1165        so as to avoid them as well.
1166    
1167    ----------------------------------------------------------------------
1168    Name: Matthias Blume
1169    Date: 2001/06/15 15:05:00 EDT
1170    Tag: blume-20010615-sparc
1171    Description:
1172    
1173    The purpose of this update is to provide an implementation of NLFFI
1174    on Sparc machines.
1175    
1176    Here are the changes in detail:
1177    
1178       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
1179       the Sparc implementation of the c-calls API.
1180       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
1181       for accessing the ML frame.  Thus, we have a real frame pointer and
1182       can freely modify %sp without need for an omit-frame-ptr phase.
1183       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
1184       this case.
1185       * ml-nlffigen has been taught to produce code for different architectures
1186       and calling conventions.
1187       * In a way similar to what was done in the x86 case, the Sparc
1188       backend uses its own specific extension to mltree.  (For example,
1189       it needs to be able to generate UNIMP instructions which are part
1190       of the calling convention.)
1191       * ml-nlffi-lib was reorganized to make it more modular (in particular,
1192       to make it easier to plug in new machine- and os-dependent parts).
1193    
1194    There are some other fairly unrelated bug fixes and cleanups as well:
1195    
1196       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
1197       that they properly share their libraries with existing SML/NJ libraries.
1198       * I fixed a minor cosmetic bug in CM, supressing certain spurious
1199       follow-up error messages.
1200       * Updates to CM/CMB documentation.
1201    
1202    TODO items:
1203    
1204       * MLRISC should use a different register as its asmTemp on the Sparc.
1205         (The current %o2 is a really bad choice because it is part of the
1206         calling conventions, so things might interfere in unexpected ways.)
1207    
1208    ----------------------------------------------------------------------
1209    Name: Matthias Blume
1210    Date: 2001/06/07
1211    Tag: blume-20010607-calls
1212    Description:
1213    
1214    A number of internal changes related to C calls and calling conventions:
1215    
1216    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
1217       number of bytes popped implicitly (by the callee).  In most cases
1218       this field is 0 but on x86/win32 it is some non-zero value.  This
1219       is information provided for the benefit of the "omit-frameptr" pass.
1220    2. The CALL instruction on the x86 carries a similar "pops" field.
1221       The instruction selection phase copies its value from the ML-Tree
1222       CALL statement.
1223    3. On all other architectures, the instruction selection phase checks
1224       whether "pops=0" and complains if not.
1225    4. The c-calls implementation for x86 now accepts two calling conventions:
1226       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
1227       up after the call and pops is set to 0.  For "stdcall", the caller
1228       does nothing, leaving the cleanup to the callee; pops is set to
1229       the number of bytes that were pushed onto the stack.
1230    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
1231       distinguish between "ccall" and "stdcall".
1232    6. The UNIMP instruction has been added to the supported Sparc instruction
1233       set. (This is needed for implementing the official C calling convention
1234       on this architecture.)
1235    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
1236       work with the latest CM.
1237    
1238    ----------------------------------------------------------------------
1239    Name: Matthias Blume
1240    Date: 2001/06/05 15:10:00 EDT
1241    Tag: blume-20010605-cm-index
1242    Description:
1243    
1244    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
1245    
1246    1. CM can now generate "index files".  These are human-readable files
1247       that list on a per-.cm-file basis each toplevel symbol defined or
1248       imported.  The location of the index file for
1249       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
1250       To enable index-file generation, set CM.Control.generate_index to true
1251       or export an environment-symbol: export CM_GENERATE_INDEX=true.
1252    
1253       The CM manual has been updated accordingly.
1254    
1255    2. I made some slight modifications to the c-calls API in MLRISC.
1256    
1257         a) There is now a callback to support saving/restoring of
1258            dedicated but caller-save registers around the actual call
1259            instruction.
1260         b) One can optionally specify a comment-annotation for the
1261            call instruction.
1262    
1263    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
1264       (For example, the comment annotation shows the C prototype of
1265        the function being called.)
1266    
1267    ----------------------------------------------------------------------
1268    Name: Matthias Blume
1269    Date: 2001/06/01 13:30:00 EDT
1270    Tag: blume-20010601-nlffi-cleanup
1271    Description:
1272    
1273    This is mostly a cleanup of MLFFI stuff:
1274    
1275       - some signature files have been put into a more exposed place
1276       - the ugly 'f type parameter is gone (simplifies types tremendously!)
1277       - ml-nlffigen changed accordingly
1278       - tutorial updated
1279    
1280    Other changes:
1281    
1282       - author's affiliation in CM manual(s) updated
1283       - some more recognized keywords added to Allen's sml.sty
1284    
1285    ----------------------------------------------------------------------
1286    Name: Matthias Blume
1287    Date: 2001/05/25 15:30:00 EDT
1288    Tag: blume-20010525-iptr
1289    Description:
1290    
1291      - put the official 110.33-README (as it appears on the ftp server) under
1292        CVS
1293      - fixed a small bug related to incomplete pointer types in
1294        ml-nlffigen
1295      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
1296        (it does not need the 'f type parameter)
1297    
1298    ----------------------------------------------------------------------
1299    Name: Matthias Blume
1300    Date: 2001/05/23 14:30:00 EDT
1301    Tag: Release_110_33
1302    Description:
1303    
1304    New version number (110.33).  New bootfiles.
1305    
1306    ----------------------------------------------------------------------
1307    Name: Matthias Blume
1308    Date: 2001/05/22 18:06:00 EDT
1309    Tag: blume-20010522-targets
1310    Description:
1311    
1312    Made install.sh use file config/targets.customized if it exists, falling
1313    back to config/targets if it doesn't.  This way one can have a customized
1314    version of the targets file without touching the "real thing", thus
1315    eliminating the constant fear of accidentally checking something bogus
1316    back into the CVS repository...  (File config/targets.customized must
1317    not be added to the repository!)
1318    
1319    ----------------------------------------------------------------------
1320    Name: Matthias Blume
1321    Date: 2001/05/22 16:30:00 EDT
1322    Tag: blume-20010522-minitut
1323    Description:
1324    
1325    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
1326       struct returns.
1327    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
1328       incomplete, preliminary documentation for NLFFI.
1329    
1330    ----------------------------------------------------------------------
1331    Name: Matthias Blume
1332    Date: 2001/05/14 11:30:00 EDT
1333    Tag: blume-20010514-script
1334    Description:
1335    
1336    Some bugs in install script fixed.
1337    
1338    In addition to that I also made a slight change to the NLFFI API:
1339    Functors generated by ml-nlffigen now take the dynamic library as a
1340    straight functor argument, not as a suspended one.  (The original
1341    functor code used to force the suspension right away anyway, so there
1342    was nothing gained by this complication of the interface.)
1343    
1344    ----------------------------------------------------------------------
1345    Name: Matthias Blume
1346    Date: 2001/05/11 14:35:00 EDT
1347    Tag: blume-20010511-ml-nlffi
1348    Description:
1349    
1350    I finally took the plunge and added my new FFI code to the main
1351    repository.  For x86-linux it is now ready for prime-time.
1352    
1353    There are two new subdirectories of "src":
1354    
1355      - ml-nlffi-lib:
1356           The utility library for programs using the FFI interface.
1357           Here is the implementation of $/c.cm and its associated low-level
1358           partners $/c-int.cm and $/memory.cm.
1359      - ml-nlffigen:
1360           A stand-alone program for generating ML glue code from C source
1361           code.
1362    
1363    Building ml-nlffigen requires $/ckit-lib.cm.
1364    
1365    The config/install.sh script has been updates to do the Right Thing
1366    (hopefully).
1367    
1368    Notice that the source tree for the C-Kit will not be put under "src"
1369    but directly under the installation root directory.  (This is the
1370    structure that currently exists on the CVS server when you check out
1371    module "sml".)  Fortunately, config/install.sh knows about this oddity.
1372    
1373    Bugs: No documentation yet.
1374    
1375    ----------------------------------------------------------------------
1376    Name: Matthias Blume
1377    Date: 2001/05/09 16:35:00 EDT
1378    Tag: blume-20010509-cpscontract
1379    Description:
1380    
1381    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
1382    wrapper/unwrapper elimination did not decrement usage counts and some
1383    dead variables got overlooked by the dead-up logic.)
1384    
1385    ----------------------------------------------------------------------
1386    Name: Lal George
1387    Date: 2001/05/08  17:26:09 EDT
1388    Tag: george-20010508-omit-frameptr
1389    Description:
1390    
1391    Changes to implement the omit-frame-pointer optimization to support
1392    raw C calls. For now, there is only support on the Intel x86, but
1393    other architectures will follow as more experience is gained with this.
1394    
1395    
1396    ----------------------------------------------------------------------
1397    Name: Matthias Blume
1398    Date: 2001/05/07 14:40:00 EDT
1399    Tag: blume-20010507-proxies
1400    Description:
1401    
1402    I made into "proxy libraries" all libraries that qualify for such a
1403    change.  (A qualifying library is a library that has another library or
1404    groups as its sole member and repeats that member's export list
1405    verbatim.  A proxy library avoids this repetition by omitting its export
1406    list, effectively inheriting the list that its (only) member exports.
1407    See the CM manual for more explanation.)
1408    The main effect is that explicit export lists for these libraries
1409    do not have to be kepts in sync, making maintenance a bit easier.
1410    
1411    I also added copyright notices to many .cm-files.
1412    
1413    Last but not least, I made a new set of bootfiles.
1414    
1415    ----------------------------------------------------------------------
1416    Name: Matthias Blume
1417    Date: 2001/05/04 17:00:00 EDT
1418    Tag: blume-20010504-cm-lsplit
1419    Description:
1420    
1421    0. John merged pending changes to $/smlnj-lib.cm
1422    
1423    1. Allen's previous change accidentally backed out of one of Lal's
1424       earlier changes.  I undid this mistake (re-introducing Lal's change).
1425    
1426    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
1427       within the compiler where applicable.  There is some code simplification
1428       because of that.
1429    
1430    3. The "split" phase (in FLINT) is now part of the default list of phases.
1431       Compiler.Control.LambdaSplitting.* can be used to globally control the
1432       lambda-splitting (cross-module-inlining) engine.  In addition to that,
1433       it can now also be controlled on a per-source basis: CM has been taught
1434       a new tool parameter applicable to ML source files.
1435    
1436       - To turn lambda-splitting off completely:
1437            local open Compiler.Control.LambdaSplitting in
1438                val _ = set Off
1439            end
1440       - To make "no lambda-splitting" the global default (but allow per-source
1441         overriding); this is the initial setting:
1442            local open Compiler.Control.LambdaSplitting in
1443                val _ = set (Default NONE)
1444            end
1445       - To make "lambda-splitting with aggressiveness a" the global default
1446         (and allow per-source overriding):
1447            local open Compiler.Control.LambdaSplitting in
1448                val _ = set (Default (SOME a))
1449            end
1450    
1451       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
1452         write (in the respective .cm-file):
1453            a.sml (lambdasplitting:off)
1454       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
1455            a.sml (lambdasplitting:on)
1456       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
1457         <a> is a decimal non-negative integer):
1458            a.sml (lambdasplitting:<a>)
1459       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
1460            a.sml (lambdasplitting:infinity)
1461       - To use the global default for a.sml:
1462            a.sml (lambdasplitting:default)
1463         or simply
1464            a.sml
1465    
1466    ----------------------------------------------------------------------
1467    Name: Allen Leung
1468    Date: 2001/05/04 01:57:00 EDT
1469    Tag: leunga-20010504-sync
1470    Description:
1471    
1472      MLRISC features.
1473    
1474      1. Fix to CMPXCHG instructions.
1475      2. Changed RA interface to allow annotations in callbacks.
1476      3. Added a new method to the stream interface to allow annotations updates.
1477    
1478    ----------------------------------------------------------------------
1479    Name: Matthias Blume
1480    Date: 2001/05/01 11:45:00 EDT
1481    Tag: blume-20010501-pcedittmp
1482    Description:
1483    
1484    Changed install.sh to use the current working directory instead of
1485    /usr/tmp for a temporary file (pcedittmp).  The previous choice
1486    of /usr/tmp caused trouble with MacOS X because of file premission
1487    problems.
1488    
1489    ----------------------------------------------------------------------
1490    Name: Matthias Blume
1491    Date: 2001/04/20 11:10:00 EDT
1492    Tag: blume-20010420-inMLflag
1493    Description:
1494    
1495     - added vp_limitPtrMask to vproc-state.h
1496       (for use by the raw-C-calls mechanism to implement proper interrupt
1497        handling)
1498     - made the ML compiler aware of various data-structure offsets so it
1499       can generate code for accessing the vp_inML flag and vp_limitPtrMask
1500     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
1501       raw C-calls
1502    
1503    ----------------------------------------------------------------------
1504    Name: Lal George
1505    Date: 2001/04/20 09:15:28 EDT
1506    Tag: george-20010420-macosX
1507    Description:
1508    
1509     - Changes to port to Mac OS X; Darwin.
1510    
1511     - In the process I found that sqrt was broken on the PPC, because the
1512       fsqrt instruction is not implemented.
1513    
1514    ----------------------------------------------------------------------
1515    Name: Matthias Blume
1516    Date: 2001/04/18 12:45:00 EDT
1517    Tag: blume-20010418-ccalls
1518    Description:
1519    
1520     - fixed two off-by-4 errors in the x86-specific c-calls implementation
1521       (this bug prevented structure arguments containing pointers from being
1522        passed correctly)
1523     - changed the raw-C-call code in mlriscGen.sml in such a way that
1524       structure arguments are represented as a pointer to the beginning
1525       of the structure (instead of having a series of synthesized arguments,
1526       one for each structure member)
1527    
1528     - made makeml script's verbosity level configurable via environment
1529       variable (MAKEML_VERBOSITY)
1530    
1531     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
1532       in rawmem-x86.sml; we are now using the real thing
1533    
1534    ----------------------------------------------------------------------
1535    Name: Matthias Blume
1536    Date: 2001/03/22 16:25:00 EST
1537    Tag: blume-20010322-bootfiles
1538    Description:
1539    
1540    Created a new set of bootfiles (for your automatic installation convenience).
1541    
1542    ----------------------------------------------------------------------
1543    Name: Matthias Blume
1544    Date: 2001/03/22 15:10:00 EST
1545    Tag: blume-20010322-rawmem-parcm
1546    Description:
1547    
1548    1. All "raw memory access" primitives for the new FFI are implemented now
1549       (at least on the x86).
1550    2. Some further cleanup of CM's parallel make mechanism.
1551    
1552    ----------------------------------------------------------------------
1553    Name: Matthias Blume
1554    Date: 2001/03/19 17:53:00 EST
1555    Tag: blume-20010319-parallel
1556    Description:
1557    
1558    Parallel make (using compile servers) now works again.
1559    
1560    To this end, CM.stabilize and CMB.make have been modified to work in
1561    two passes when compile servers are attached:
1562       1. Compile everything, do not perform stabilization; this pass
1563          uses compile servers
1564       2. Stabilize everything; this pass does not use compile servers
1565    If there are no compile servers, the two passes are combined into one
1566    (as before).  Splitting the passes increases the inherent parallelism
1567    in the dependency graph because the entire graph including all
1568    libraries is available at the same time.  This, in turn, improves
1569    server utilization.  The downside is that the master process will
1570    have to do some extra work after compilation is done (because for
1571    technical reasons it must re-read all the binfiles during stabilization).
1572    
1573    ----------------------------------------------------------------------
1574    Name: Matthias Blume
1575    Date: 2001/03/16 12:22:00 EST
1576    Tag: blume-20010316-bootfiles
1577    Description:
1578    
1579    Created a new set of bootfiles (for your automatic installation convenience).
1580    
1581    ----------------------------------------------------------------------
1582    Name: Matthias Blume
1583    Date: 2001/03/16 11:00:00 EST
1584    Tag: blume-20010316-MLTREE-fixup
1585    Description:
1586    
1587    This is a minor fixup for an (untagged) earlier commit by Allen.
1588    (A file was missing).
1589    
1590    ----------------------------------------------------------------------
1591    Name: Allen Leung
1592    Date: Mon Mar  5 18:54:57 EST 2001
1593    Tag: leunga-20010305-cut-support
1594    
1595    1. New support for alternative control-flow in MLTREE.
1596       Currently we support
1597    
1598          FLOW_TO(CALL ...., [k1,...,kn])
1599    
1600       This is needed for 'cuts to' in C-- and try/handle-like constructs
1601       in Moby
1602    
1603       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
1604    
1605    2. Register Allocator
1606    
1607       Changes in interface [from Fermin, John]
1608    
1609    3. Alpha 8-bit SLL support [Fermin]
1610    
1611    4. All architectures
1612    
1613       A new module (ClusterExpandCopies) for expanding parallel copies.
1614    
1615    ----------------------------------------------------------------------
1616    Name: Allen Leung
1617    Date: 2001/02/27 23:07:00 EST
1618    Tag: leunga-20010227-minor-stuff
1619    
1620    1. Alpha bug fix for CMOVNE
1621    2. Handle mltree COND(..,FCMP ...,...)
1622    3. Bug fix in simplifier
1623    
1624    ----------------------------------------------------------------------
1625    Name: Matthias Blume
1626    Date: 2001/01/30 17:50:00 EST
1627    Tag: blume-20010130-sync
1628    Description:
1629    
1630    This is just a minor update to sync my devel branch with the main brach.
1631    The only visible change is the addition of some README files.
1632    
1633    ----------------------------------------------------------------------
1634    Name: Matthias Blume
1635    Date: 2001/01/12 23:30:00 JST
1636    Tag: blume-20010112-bootfiles
1637    Description:
1638    
1639    Made a new set of bootfiles that goes with the current state of the
1640    repository.
1641    
1642    ----------------------------------------------------------------------
1643    Name: Matthias Blume
1644    Date: 2001/01/12 21:20:00 JST
1645    Tag: blume-20010112-sync
1646    Description:
1647    
1648    I am just flushing out some minor changes that had accumulated in
1649    my private branch in order to sync with the main tree.  (This is
1650    mainly because I had CVS trouble when trying to merge _into_ my
1651    private branch.)
1652    
1653    Most people should be completely unaffected by this.
1654    
1655    ----------------------------------------------------------------------
1656    Name: Allen Leung
1657    Date: Thu Jan 11 21:03:00 EST 2001
1658    Tag: leunga-20010111-labexp=mltree
1659    Description:
1660    
1661    1.  Removed the type LabelExp and replace it by MLTree.
1662    2.  Rewritten mltree-simplify with the pattern matcher tool.
1663    3.  There were some bugs in alpha code generator which would break
1664        64-bit code generation.
1665    4.  Redo the tools to generate code with the
1666    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
1667        are now generated by perl scripts.
1668    
1669    ----------------------------------------------------------------------
1670    Name: Matthias Blume
1671    Date: 2001/01/10 21:55:00 JST
1672    Tag: blume-20010110-rcc
1673    Description:
1674    
1675    The RCC stuff now seems to work (but only on the x86).
1676    This required hacking of the c-calls interface (and -implementation) in
1677    MLRISC.
1678    
1679    Normal compiler users should be unaffected.
1680    
1681    ----------------------------------------------------------------------
1682    Name: Matthias Blume
1683    Date: 2001/01/09 01:20:00 JST
1684    Tag: blume-20010109-rcc
1685    Description:
1686    
1687    This is a fairly big patch, flushing out a large number of pending
1688    changes that I made to my development copy over the last couple of days.
1689    
1690    Of practical relevance at this moment is a workaround for a pickling
1691    bug that Allen ran into the other day.  The cause of the bug itself is
1692    still unknown and it might be hard to fix it properly, but the
1693    workaround has some merits of its own (namely somewhat reducing pickling
1694    overhead for certain libraries).  Therefore, I think this solution should
1695    be satisfactory at this time.
1696    
1697    The rest of the changes (i.e., the vast majority) has to do with my
1698    ongoing efforts of providing direct support for C function calls from
1699    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
1700    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
1701    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
1702    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
1703    handle RCC.
1704    
1705    The last part (the changes to mlriscGen.sml) are still known to be
1706    wrong on the x86 and not implemented on all other architectures.  But
1707    the infrastructure is in place. I had to change a few functor
1708    signatures in the backend to be able to route the CCalls interface
1709    from MLRISC there, and I had to specialize the mltree type (on the
1710    x86) to include the necessary extensions. (The extensions themselves
1711    were already there and redy to go in MLRISC/x86).
1712    
1713    Everything should be very happy as soon as someone helps me with
1714    mlriscGen.sml...
1715    
1716    In any case, nothing of this should matter to anyone as long as the
1717    new primop is not being used (which is going to be the case unless you
1718    find it where I hid it :). The rest of the compiler is completely
1719    unaffected.
1720    
1721    ----------------------------------------------------------------------
1722    Name: Matthias Blume
1723    Date: 2001/01/05 00:30:00 JST
1724    Tag: blume-20010105-primops
1725    Description:
1726    
1727    Added some experimental support for work that I am doing right now.
1728    These changes mostly concern added primops, but there is also a new
1729    experimental C library in the runtime system (but currently not enabled
1730    anywhere except on Linux/X86).
1731    
1732    In the course of adding primops (and playing with them), I discovered that
1733    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
1734    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
1735    To recover, I made type information in INL_PRIM mandatory and changed
1736    prim.sml as well as built-in.sml accordingly.  The InLine structure now
1737    has complete, correct type information (i.e., no bottom types).
1738    
1739    Since all these changes mean that we need new binfiles, I also bumped the
1740    version number to 110.32.1.
1741    
1742    ----------------------------------------------------------------------
1743    Name: Matthias Blume
1744    Date: 2000/12/30 22:10:00 JST
1745    Tag: blume-20001230-various
1746    Description:
1747    
1748    Added proxy libraries for MLRISC and let MLRISC libraries refer
1749    to each other using path anchors.  (See CM manual for explanation.)
1750    
1751    Updated CM documentation.
1752    
1753    Fixed some bugs in CM.
1754    
1755    Implemented "proxy" libraries (= syntactic sugar for CM).
1756    
1757    Added "-quiet" option to makeml and changed runtime system accordingly.
1758    
1759    Added cleanup handler for exportML to reset timers and compiler stats.
1760    
1761    ----------------------------------------------------------------------
1762    Name: Lal George
1763    Date: 2000/12/22 22:22:58 EST 2000
1764    Tag: Release_110_32
1765    Description:
1766    
1767            Infinite precision used throughout MLRISC.
1768            see MLRISC/mltree/machine-int.sig
1769    
1770    ----------------------------------------------------------------------
1771    Name: Matthias Blume
1772    Date: 2000/12/22 23:16:00 JST
1773    Tag: blume-20001222-warn
1774    Description:
1775    
1776    Corrected wording and formatting of some CM warning message which I
1777    broke in my previous patch.
1778    
1779    ----------------------------------------------------------------------
1780    Name: Matthias Blume
1781    Date: 2000/12/22 21:20:00 JST
1782    Tag: blume-20001222-anchorenv
1783    Description:
1784    
1785    Fixed CM's handling of anchor environments in connection with CMB.make.
1786    
1787    ----------------------------------------------------------------------
1788    Name: Matthias Blume
1789    Date: 2000/12/22 13:15:00 JST
1790    Tag: blume-20001222-cleanup
1791    Description:
1792    
1793    Removed src/cm/ffi which does not (and did not) belong here.
1794    
1795    ----------------------------------------------------------------------
1796    Name: Matthias Blume
1797    Date: 2000/12/21 23:55:00 JST
1798    Tag: blume-20001221-exn
1799    Description:
1800    
1801    Probably most important: CM no longer silently swallows all exceptions
1802    in the compiler.
1803    Plus: some other minor CM changes.  For example, CM now reports some
1804    sizes for generated binfiles (code, data, envpickle, lambdapickle).
1805    
1806    ----------------------------------------------------------------------
1807    Name: Matthias Blume
1808    Date: 2000/12/15 00:01:05 JST
1809    Tag: blume-20001215-dirtool
1810    Description:
1811    
1812    - "dir" tool added.
1813    - improvements and cleanup to Tools structure
1814    - documentation updates
1815    
1816    ----------------------------------------------------------------------
1817    Name: Allen Leung
1818    Date: Thu Dec 14 03:45:24 EST 2000
1819    Description:
1820    Tag:  leunga-20001214-int-inf
1821    Description:
1822    
1823       In IntInf, added these standard functions, which are missing from our
1824    implementation:
1825    
1826        andb : int * int -> int
1827        xorb : int * int -> int
1828        orb  : int * int -> int
1829        notb : int -> int
1830         <<   : int * word -> int
1831        ~>>  : int * word -> int
1832    
1833       Not tested, I hope they are correct.
1834    
1835    ----------------------------------------------------------------------
1836    Name: Allen Leung
1837    Date: Fri Dec  8 19:23:26 EST 2000
1838    Description:
1839    Tag:  leunga-20001208-nowhere
1840    Description:
1841    
1842      Slight improvements to the 'nowhere' tool to handle OR-patterns,
1843    to generate better error messages etc.  Plus a brief manual.
1844    
1845    ----------------------------------------------------------------------
1846    Name: Lal George
1847    Date: 2000/12/08 09:54:02 EST 2000
1848    Tag: Release_110_31
1849    Description:
1850    
1851    - Version 110.31
1852    ----------------------------------------------------------------------
1853    Name: Allen Leung
1854    Date: Thu Dec  7 22:01:04 EST 2000
1855    Tag:  leunga-20001207-cell-monster-hack
1856    Description:
1857    
1858    Major MLRISC internal changes.  Affect all clients.
1859    Summary:
1860    
1861    1.  Type CELLS.cell = int is now replaced by a datatype.
1862        As a result, the old regmap is now gone.  Almost all interfaces
1863        in MLRISC change as a consequence.
1864    
1865    2.  A new brand version of machine description tool (v3.0) that generates
1866        modules expecting the new interface.  The old version is removed.
1867    
1868    3.  The RA interface has been further abstracted into two new functors.
1869        RISC_RA and X86RA.  These functors have much simpler interfaces.
1870        [See also directory MLRISC/demo.]
1871    
1872    4.  Some other new source->source code generation tools are available:
1873    
1874        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
1875        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
1876           I use this tool to generate the peephole optimizers---with the new
1877           cell type changes, peephole rules are becoming difficult to write
1878           without conditional pattern matching.
1879    
1880    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
1881        cover the entire MLRISC source tree so many things broke.
1882    
1883    6.  CM files have been moved to the subdirectory MLRISC/cm.
1884        They are moved because there are a lot of them and they clutter up the
1885        root dir.
1886    
1887    7.  More detailed documentation to come...
1888    
1889        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
1890        a makeml -rebuild first.  This is because of other other
1891        changes that Matthias has made (see below).
1892    
1893    
1894    ----------------------------------------------------------------------
1895    Name: Matthias Blume
1896    Date: 2000/11/30 23:12:00 JST
1897    Tag: blume-20001130-filereorg
1898    Description:
1899    
1900    Some manual updates and some file reorganizations in CM.
1901    
1902    ----------------------------------------------------------------------
1903    Name: Matthias Blume
1904    Date: 2000/11/24 17:45:00 JST
1905    Tag: blume-20001124-link
1906    Description:
1907    
1908    Drastically improved link traversal code for the case that the dynamic
1909    value was already loaded at bootstrap time.  As a result, CM and CMB
1910    now both load blazingly fast -- even on a very slow machine.  Also,
1911    memory consumption has been further reduced by this.
1912    
1913    Warning: The format of the PIDMAP file has changed.  THerefore, to
1914    bootstrap you have to do this:
1915    
1916    1. Run CMB.make
1917    2. Make a symbolic link for the boot directory:
1918         ln -s sml.boot.ARCH-OS xxx
1919    3. "Rebuild" the boot directory:
1920         ./makeml -boot xxx -rebuild sml ; rm xxx
1921    4. Boot normally:
1922          ./makeml
1923    
1924    ----------------------------------------------------------------------
1925    Name: Matthias Blume
1926    Date: 2000/11/21 21:20:00 JST
1927    Tag: blume-20001121-tools
1928    Description:
1929    
1930    Continued hacking on autoloading problem -- with success this time.
1931    Also changed tool-plugin mechanism.  See new CM manual.
1932    
1933    ----------------------------------------------------------------------
1934    Name: Matthias Blume
1935    Date: 2000/11/19 14:30:00 JST
1936    Tag:  blume-20001119-autoload
1937    Description:
1938    
1939    Some hacking to make autoloading faster.  Success for CMB, no success
1940    so far for CM.  There is a reduced structure CM' that autoloads faster.
1941    (This is a temporary, non-documented hack to be eliminated again when
1942    the general problem is solved.)
1943    
1944    ----------------------------------------------------------------------
1945    Name: Matthias Blume
1946    Date: 2000/11/17 14:10:00 JST
1947    Tag: blume-20001117-pickle-lib
1948    Description:
1949    
1950    1. Eliminated comp-lib.cm
1951    2. Made pickle-lib.cm
1952    3. Eliminated all uses of intset.sml (from comp-lib.cm)
1953    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
1954       equivalent constructs from smlnj-lib.cm (INtHashTable).
1955    5. Point 4. also goes for those uses of intmap.* in MLRISC.
1956       Duplicated intmap modules thrown out.
1957    6. Hunted down all duplicated SCC code and replaced it with
1958       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
1959    7. Rewrote Feedback module.
1960    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
1961       should be thrown out and equivalent modules from smlnj-lib.cm
1962       should be used (IntRedBlackSet, IntListSet, ...).
1963    
1964    Confirmed that compiler compiles to fixpoint.
1965    
1966    ----------------------------------------------------------------------
1967    Name: Allen Leung
1968    Date: 2000/11/10 18:00:00
1969    Tag: leunga-20001110-new-x86-fp
1970    
1971    A new x86 floating point code generator has been added.
1972    By default this is turned off.  To turn this on, do:
1973    
1974        CM.autoload "$smlnj/compiler.cm";
1975        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
1976    
1977    Changes:
1978    
1979    1.  Changed FTAN to FPTAN so that the assembly output is correct.
1980    2.  Changed the extension callback for FTANGENT to generate:
1981    
1982              fptan
1983              fstp  %st(0)
1984        instead of
1985              fptan
1986              fstpl ftempmem
1987    
1988    3.  Numerous assembly fixes for x86.
1989    
1990    5.  Cleaned up the machine code output module x86/x86MC.sml and added
1991        support for a whole bunch of instructions and addressing modes:
1992    
1993          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
1994          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
1995          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
1996          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
1997          fxch %st(n)
1998          fld %st(n)
1999          fst %st(n)
2000          fst mem
2001          fstp %st(n)
2002          fucom %st(n)
2003          fucomp %st(n)
2004    
2005        All these are now generated when the fast fp mode is turned on.
2006    
2007    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
2008    
2009    ----------------------------------------------------------------------
2010    Name: Matthias Blume
2011    Date: 2000/11/09 11:20:00 JST
2012    Tag: blume-20001109-scc
2013    Description:
2014    
2015    Eliminated some code duplication:
2016    
2017    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
2018       (Otherwise the functor is useless.)
2019    2. Used GraphSCCFn where SCCUtilFun was used previously.
2020    3. Got rid of SCCUtilFun (in comp-lib.cm).
2021    
2022    ----------------------------------------------------------------------
2023    Name: Lal George
2024    Date: 2000/11/06 09:02:21 EST 2000
2025    Tag: Release_110_30
2026    Description:
2027    
2028    - Version 110.30
2029    ----------------------------------------------------------------------
2030    Name: Matthias Blume
2031    Date: 2000/11/04 14:45:00
2032    Tag: blume-20001104-mlbuild
2033    Description:
2034    
2035    - Made ml-build faster on startup.
2036    - Documentation fixes.
2037    
2038    ----------------------------------------------------------------------
2039    Name: Matthias Blume
2040    Date: 2000/11/02 17:00:00 JST
2041    Tag: blume-20001102-condcomp
2042    Description:
2043    
2044    - Small tweaks to pickler -- new BOOTFILES!
2045    - Version bumped to 110.29.2.
2046    - Added conditional compilation facility to init.cmi (see comment there).
2047    ----------------------------------------------------------------------
2048    Name: Allen Leung
2049    Date: 2000/10/23 19:31:00
2050    Tag: leunga-20001023-demo-ra
2051    
2052    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
2053    2. Test programs for the graph library updated
2054    3. Some new MLRISC demo programs added
2055    
2056    ----------------------------------------------------------------------
2057    Name: Matthias Blume
2058    Date: 2000/08/31 22:15:00 JST
2059    Tag: blume-20001017-errmsg
2060    Description:
2061    
2062    More error message grief: Where there used to be no messages, there
2063    now were some that had bogus error regions.  Fixed.
2064    
2065    ----------------------------------------------------------------------
2066    Name: Matthias Blume
2067    Date: 2000/08/31 17:30:00 JST
2068    Tag: blume-20001017-v110p29p1
2069    Description:
2070    
2071    I made a version 110.29.1 with new bootfiles.
2072    
2073    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
2074              CM documentation changes and a small bugfix in CM's error reporting.
2075    
2076    ----------------------------------------------------------------------
2077    Name: Lal George
2078    Date: 2000/09/27 14:42:35 EDT
2079    Tag: george-20000927-nodestatus
2080    Description:
2081    
2082    Changed the type of the nodestatus, so that:
2083    
2084            SPILLED(~1)             is now SPILLED
2085            SPILLED(m) where m>=0   is now MEMREG(m)
2086            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
2087    
2088    ----------------------------------------------------------------------
2089    Name: Matthias Blume
2090    Date: 2000/09/07 14:45:00 JST
2091    Tag: blume-20000907-cmerrmsg
2092    Description:
2093    
2094    Small tweak to CM to avoid getting ML syntax error messages twice.
2095    
2096    ----------------------------------------------------------------------
2097    Name: Matthias Blume
2098    Date: 2000/08/31 18:00:00 JST
2099    Tag: blume-20000831-cvsbootfiles
2100    Description:
2101    
2102    New URL for boot files (because the 110.29 files on the BL server do
2103    now work correctly with my updated install scripts for yacc and lex).
2104    
2105    ----------------------------------------------------------------------
2106    Name: Matthias Blume
2107    Date: 2000/08/08 12:33:00 JST
2108    Tag: blume-20000808-manual
2109    Description:
2110    
2111    Tiny update to CM manual.
2112    
2113    ----------------------------------------------------------------------
2114    Name: Allen Leung
2115    Date: 2000/08/7 19:31:00
2116    Tag: leunga-20000807-a-whole-bunch-of-stuff
2117    
2118      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
2119    and Mobdy.
2120    
2121    1.  x86
2122    
2123       a.  Fixes to peephole module by John and Dan.
2124       b.  Assembly fix to SETcc by Allen.
2125       c.  Fix to c-call by John.
2126       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
2127       e.  Instruction selection optimization to SETcc as suggested by John.
2128    
2129           For example,
2130    
2131            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
2132    
2133           should generate:
2134    
2135            MOVL a, x
2136            SUBL b, x
2137            SHRL 31, x
2138    
2139    2.  IR stuff
2140    
2141         A bunch of new DJ-graph related algorithms added.  These
2142         speed up SSA construction.
2143    
2144    3.  SSA + Scheduling
2145    
2146         Added code for SSA and scheduling to the repository
2147    
2148    ----------------------------------------------------------------------
2149    Name: Lal George
2150    Date: 2000/07/27 11:53:14 EDT
2151    
2152    Tag: lal-20000727-linux-ppc
2153    Description:
2154    
2155     Made changes to support Linux PPC.
2156     p.s. I have confirmation that the 110.29 boot files work fine.
2157    
2158    ----------------------------------------------------------------------
2159    Name: Matthias Blume
2160    Date: 2000/07/27 17:40:00 JST
2161    Tag: blume-20000727-scripts
2162    Description:
2163    
2164    !!!! WARNING !!!!
2165    You must recompile the runtime system!
2166    !!!! WARNING !!!!
2167    
2168    This is basically another round of script-enhancements:
2169    
2170    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
2171       and undefine CM preprocessor symbols.
2172    
2173    2. ml-build avoids generating a new heap image if it finds that the
2174       existing one is still ok.  (The condition is that no ML file had to
2175       be recompiled and all ML files are found to be older that the heap
2176       file.)
2177    
2178       To make this work smoothly, I also hacked the runtime system as
2179       well as SMLofNJ.SysInfo to get access to the heap image suffix
2180       (.sparc-solaris, ...) that is currently being used.
2181    
2182       Moreover, the signature of CM.mk_standalone has changed.  See the
2183       CM manual.
2184    
2185    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
2186       CM manual for details.)
2187    
2188    4. More CM manual updates:
2189        - all of the above has been documented.
2190        - there is now a section describing the (CM-related) command line
2191          arguments that are accepted by the "sml" command
2192    
2193    ----------------------------------------------------------------------
2194    Name: Matthias Blume
2195    Date: 2000/07/25 16:20:00 JST
2196    Tag: blume-20000725-makedepend
2197    Description:
2198    
2199    Added a script called ml-makedepend.  This can be used in makefiles
2200    for Unix' make in a way very similar to the "makedepend" command for
2201    C.
2202    
2203    The script internally uses function CM.sources.
2204    
2205    Synopsis:
2206    
2207        ml-makedepend [-f makefile] cmfile targetname
2208    
2209    The default for the makefile is "makefile" (or "Makefile" should
2210    "makefile" not exist).
2211    
2212    ml-makedepend adds a cmfile/targetname-specific section to this
2213    makefile (after removing the previous version of this section).  The
2214    section contains a single dependency specification with targetname on
2215    the LHS (targetname is an arbitrary name), and a list of files derived
2216    from the cmfile on the RHS.  Some of the files on the RHS are
2217    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
2218    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
2219    path names.  The makefile writer is responsible for making sure that
2220    these variables have correct at the time "make" is invoked.
2221    
2222    ----------------------------------------------------------------------
2223    Name: Matthias Blume
2224    Date: 2000/07/22 23:30:00 JST
2225    Tag: blume-20000722-urlupdate
2226    Description:
2227    
2228    Changed BOOT and config/srcarchiveurl to point to BL server:
2229    
2230        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
2231    
2232    ----------------------------------------------------------------------
2233    Name: Matthias Blume
2234    Date: 2000/07/18 18:00:00 JST
2235    Tag: blume-20000718-Version_110_29
2236    Description:
2237    
2238    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
2239    
2240    2. Updated config/version to 110.29
2241    
2242    3. Updated config/srcarchiveurl
2243    
2244    3. New boot files!
2245       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
2246    
2247    ----------------------------------------------------------------------
2248    Name: Matthias Blume
2249    Date: 2000/07/11 13:58:00 JST
2250    Tag: blume-20000711-doctypo
2251    Description:
2252    
2253    Fixed a few typos in CM manual.
2254    
2255    ----------------------------------------------------------------------
2256    Name: Allen Leung
2257    Date: 2000/06/15 00:38:00
2258    Tag: leunga-20000704-sparc-x86
2259    
2260    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
2261    2. fix to x86 RET bug [found by Dan Grossman]
2262    3. sparc assembly bug fix for ticc instructions [found by Fermin]
2263    
2264       Affects c-- and moby only
2265    
2266    ----------------------------------------------------------------------
2267    Name: Matthias Blume
2268    Date: 2000/07/04 15:26:00
2269    Tag: blume-20000704-trigger
2270    Description:
2271    
2272    1. Improvements to CM manual.
2273    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
2274       of getting a back-trace.  The function, when called, raises an
2275       internal exception which explicitly carries the full back-trace history,
2276       so it is unaffected by any intervening handle-raise pairs ("trivial"
2277       or not).  The interactive loop will print that history once it arrives
2278       at top level.
2279       Short of having all exceptions implicitly carry the full history, the
2280       recommended way of using this facility is:
2281         - compile your program with instrumentation "on"
2282         - run it, when it raises an exception, look at the history
2283         - if the history is "cut off" because of some handler, go and modify
2284           your program so that it explicitly calls BTrace.trigger
2285         - recompile (still instrumented), and rerun; look at the full history
2286    
2287    ----------------------------------------------------------------------
2288    Name: Matthias Blume
2289    Date: 2000/07/03 15:36:00 JST
2290    Tag: blume-20000702-manual
2291    Description:
2292    
2293    Small corrections and updates to CM manual.
2294    
2295    ----------------------------------------------------------------------
2296    Name: Matthias Blume
2297    Date: 2000/06/29 16:04:00 JST
2298    Tag: blume-20000629-yacctool
2299    Description:
2300    
2301    Changes:
2302    
2303    1. Class "mlyacc" now takes separate arguments to pass options to
2304       generated .sml- and .sig-files independently.
2305    2. Corresponding CM manual updates.
2306    3. BTrace module now also reports call sites.  (However, for loop clusters
2307       it only shows from where the cluster was entered.)  There are associated
2308       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
2309    
2310    ----------------------------------------------------------------------
2311    Name: Matthias Blume
2312    Date: 2000/06/27 16:51:00 JST
2313    Tag: blume-20000627-noweb
2314    Description:
2315    
2316    Changes:
2317    
2318     1. Implemented "subdir" and "witness" options for noweb tool.
2319        This caused some slight internal changes in CM's tool implementation.
2320     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
2321        some remaining issues from earlier path anchor changes.
2322     3. Updated CM manual accordingly.
2323    
2324     4. Changed implementation of back-tracing so that I now consider it
2325        ready for prime-time.
2326    
2327        In particular, you don't have to explicitly trigger the back-trace
2328        anymore.  Instead, if you are running BTrace-instrumented code and
2329        there is an uncaught exception (regardless of whether or not it was
2330        raised in instrumented code), the top-level evalloop will print
2331        the back-trace.
2332    
2333        Features:
2334    
2335          - Instrumented and uninstrumented code work together seemlessly.
2336            (Of course, uninstrumented code is never mentioned in actual
2337             back-traces.)
2338    
2339          - Asymptotic time- and space-complexity of instrumented code is
2340            equal to that of uninstrumented code.  (This means that
2341            tail-recursion is preserved by the instrumentation phase.)
2342    
2343          - Modules whose code has been instrumented in different sessions
2344            work together without problem.
2345    
2346          - There is no penalty whatsoever on uninstrumented code.
2347    
2348          - There is no penalty on "raise" expressions, even in
2349            instrumented code.
2350    
2351        A potential bug (or perhaps it is a feature, too):
2352    
2353          A back-trace reaches no further than the outermost instrumented
2354          non-trivial "raise".  Here, a "trivial" raise is one that is the
2355          sole RHS of a "handle" rule.  Thus, back-traces reach trough
2356    
2357               <exp> handle e => raise e
2358    
2359          and even
2360    
2361               <exp> handle Foo => raise Bar
2362    
2363          and, of course, through
2364    
2365               <exp> handle Foo => ...
2366    
2367         if the exception was not Foo.
2368    
2369         Back-traces always reach right through any un-instrumented code
2370         including any of its "handle" expressions, trivial or not.
2371    
2372       To try this out, do the following:
2373    
2374         - Erase all existing binfiles for your program.
2375           (You may keep binfiles for those modules where you think you
2376            definitely don't need back-tracing.)
2377         - Turn on back-trace instrumentation:
2378              SMLofNJ.Internals.BTrace.mode (SOME true);
2379         - Recompile your program.  (I.e., run "CM.make" or "use".)
2380         - You may now turn instrumentation off again (if you want):
2381              SMLofNJ.Internals.BTrace.mode (SOME false);
2382         - Run your program as usual.  If it raises an exception that
2383           reaches the interactive toplevel, then a back-trace will
2384           automatically be printed.  After that, the toplevel loop
2385           will print the exception history as usual.
2386    
2387    ----------------------------------------------------------------------
2388    Name: Matthias Blume
2389    Date: 2000/06/26 09:56:46 JST
2390    Tag: blume-20000626-setup
2391    Description:
2392    
2393    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
2394          ML code before and after compiling a file (e.g., to set compiler
2395          flags)
2396    
2397    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
2398              - associated changes to btrace.sml (BTrace instrumentation pass)
2399              - cleaner implementation of btimp.sml (BTrace tracing and report
2400                module)
2401    
2402    CM manual: * new path encoding documented
2403               * description of setup-parameter to "sml" added
2404    
2405    The biggest user-visible change to back-tracing is that it is no
2406    longer necessary to compile all traced modules within the same
2407    session.  (This was a real limitation.)
2408    
2409    ----------------------------------------------------------------------
2410    Name: Matthias Blume
2411    Date: 2000/06/24 12:40:00 JST
2412    Tag: blume-20000624-startup
2413    Description:
2414    
2415    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
2416    bit too often -- to put it mildly. :)
2417    
2418    ----------------------------------------------------------------------
2419    Name: Matthias Blume
2420    Date: 2000/06/23 18:20:00 JST
2421    Tag: blume-20000623-btrace
2422    Description:
2423    
2424    This updates adds a backtrace facility to aid programmers in debugging
2425    their programs.  This involves the following changes:
2426    
2427    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
2428       keeping track of the current call stack.  When programs are compiled
2429       in a special mode, the compiler will insert calls to these hooks
2430       into the user program.
2431       "Hook" means that it is possible for different implementations of
2432       back-tracing to register themselves (at different times).
2433    
2434    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
2435       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
2436       It can be turned on using this call:
2437         SMLofNJ.Internals.BTrace.mode (SOME true);
2438       Turning it off again:
2439         SMLofNJ.Internals.BTrace.mode (SOME false);
2440       Querying the current status:
2441         SMLofNJ.Internals.BTrace.mode NONE;
2442       Annotated programs are about twice as big as normal ones, and they
2443       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
2444       where all hooks do nothing).  The slowdown with a plugin that is
2445       actually useful (such as the one supplied by default) is even greater,
2446       but in the case of the default plugin it is still only an constant
2447       factor (amortized).
2448    
2449    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
2450       with a sub-structure BTrace for controlling back-tracing.  In particular,
2451       the above-mentioned function "mode" controls whether the annotation
2452       phase is invoked by the compiler.  Another important function is
2453       "trigger": when called it aborts the current execution and causes
2454       the top-level loop to print a full back-trace.
2455    
2456    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
2457       for back-tracing.  It keeps track of the dynamic call stack and in
2458       addition to that it keeps a partial history at each "level" of that
2459       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
2460       d and b (at separate times, dynamically), then the report will show:
2461    
2462       GOTO   d
2463             /c
2464       GOTO  \b
2465       CALL   a
2466    
2467       This shows that there was an initial non-tail call of a, then a
2468       tail-call to b or c, looping behavior in a cluster of functions that
2469       consist of b and c, and then a goto from that cluster (i.e., either from
2470       b or from c) to d.
2471    
2472       Note that (depending on the user program) the amount of information
2473       that the back-trace module has to keep track of at each level is bounded
2474       by a constant.  Thus, the whole implementation has the same asymptotical
2475       complexity as the original program (both in space and in time).
2476    
2477    5. compiler/TopLevel/interact/evalloop.sml has been modified to
2478       handle the special exception SMLofNJ.Internals.BTrace.BTrace
2479       which is raised by the "trigger" function mentioned above.
2480    
2481    Notes on usage:
2482    
2483    - Annotated code works well together with unannotated code:
2484    Unannotated calls simply do not show up at all in the backtrace.
2485    
2486    - It is not a good idea to let modules that were annotated during
2487    different sessions run at the same time.  This is because the compiler
2488    chooses small integers to identify individual functions, and there
2489    will be clashes if different modules were compiled in separate sessions.
2490    (Nothing will crash, and you will even be told about the clashes, but
2491    back-trace information will in general not be useful.)
2492    
2493    - Back-tracing can be confused by callcc and capture.
2494    
2495    - The only way of getting a back-trace right now is to explicitly
2496    invoke the "trigger" function from your user program.  Eventually, we
2497    should make every exception carry back-trace information (if
2498    available).  But since this creates more overhead at "raise"-time
2499    (similar to the current exnHistory overhead), I have not yet
2500    implemented this.  (The implementation will be rather easy.)  With
2501    exceptions carrying back-trace information, this facility will be even
2502    more useful because users don't need to modify their programs...
2503    
2504    - While it is possible to compile the compiler with back-trace
2505    annotations turned on (I did it to get some confidence in
2506    correctness), you must make absolutely sure that core.sml and
2507    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
2508    be compiled with annotation because there is no core access yet, but
2509    if you compile btimp.sml with annotation, then the system will go into
2510    an infinite recursion and crash.)
2511    Since CM currently does not know about BTrace, the only way to turn
2512    annotations on and off for different modules of the compiler is to
2513    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
2514    this is awkward and clumsy.
2515    
2516    Sample sessions:
2517    
2518    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2519    - SMLofNJ.Internals.BTrace.mode (SOME true);
2520    [autoloading]
2521    [autoloading done]
2522    val it = false : bool
2523    - structure X = struct
2524    -     fun main n = let
2525    -         fun a (x, 0) = d x
2526    -           | a (x, n) = b (x, n - 1)
2527    -         and b (x, n) = c (x, n)
2528    -         and c (x, n) = a (x, n)
2529    -         and d x = e (x, 3)
2530    -         and e (x, 0) = f x
2531    -           | e (x, n) = e (x, n - 1)
2532    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
2533    -           | f n = n * g (n - 1)
2534    -         and g n = a (n, 3)
2535    -     in
2536    -         f n
2537    -     end
2538    - end;
2539    structure X : sig val main : int -> int end
2540    - X.main 3;
2541    *** BACK-TRACE ***
2542    GOTO   stdIn:4.2-13.20: X.main[2].f
2543    GOTO-( stdIn:4.2-13.20: X.main[2].e
2544    GOTO   stdIn:4.2-13.20: X.main[2].d
2545         / stdIn:4.2-13.20: X.main[2].a
2546         | stdIn:4.2-13.20: X.main[2].b
2547    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2548    CALL   stdIn:4.2-13.20: X.main[2].g
2549    GOTO   stdIn:4.2-13.20: X.main[2].f
2550    GOTO-( stdIn:4.2-13.20: X.main[2].e
2551    GOTO   stdIn:4.2-13.20: X.main[2].d
2552         / stdIn:4.2-13.20: X.main[2].a
2553         | stdIn:4.2-13.20: X.main[2].b
2554    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2555    CALL   stdIn:4.2-13.20: X.main[2].g
2556    GOTO   stdIn:4.2-13.20: X.main[2].f
2557    GOTO-( stdIn:4.2-13.20: X.main[2].e
2558    GOTO   stdIn:4.2-13.20: X.main[2].d
2559         / stdIn:4.2-13.20: X.main[2].a
2560         | stdIn:4.2-13.20: X.main[2].b
2561    GOTO-\ stdIn:4.2-13.20: X.main[2].c
2562    CALL   stdIn:4.2-13.20: X.main[2].g
2563    GOTO   stdIn:4.2-13.20: X.main[2].f
2564    CALL   stdIn:2.15-17.4: X.main[2]
2565    -
2566    
2567    (Note that because of a FLINt bug the above code currently does not
2568    compile without BTrace turned on.)
2569    
2570    Here is another example, using my modified Tiger compiler:
2571    
2572    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
2573    - SMLofNJ.Internals.BTrace.mode (SOME true);
2574    [autoloading]
2575    [autoloading done]
2576    val it = false : bool
2577    - CM.make "sources.cm";
2578    [autoloading]
2579    ...
2580    [autoloading done]
2581    [scanning sources.cm]
2582    [parsing (sources.cm):parse.sml]
2583    [creating directory CM/SKEL ...]
2584    [parsing (sources.cm):tiger.lex.sml]
2585    ...
2586    [wrote CM/sparc-unix/semant.sml]
2587    [compiling (sources.cm):main.sml]
2588    [wrote CM/sparc-unix/main.sml]
2589    [New bindings added.]
2590    val it = true : bool
2591    - Main.compile ("../testcases/merge.tig", "foo.out");
2592    *** BACK-TRACE ***
2593    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
2594    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2595    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2596    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
2597    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2598    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2599    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
2600         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
2601    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
2602    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
2603    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
2604    CALL   main.sml:1.18-118.4: Main.compile[2]
2605    -
2606    
2607    ----------------------------------------------------------------------
2608    Name: Matthias Blumen
2609    Date: 2000/06/21 18:00:00 JST
2610    Tag: blume-20000621-manual
2611    Description:
2612    
2613    CM manual update: Path environments documented.
2614    
2615    ----------------------------------------------------------------------
2616    Name: Matthias Blume
2617    Date: 2000/06/19 13:40:00
2618    Tag: blume-20000619-manual
2619    Description:
2620    
2621    CM manual and system/README update.  This only covers the fact that
2622    there are no more implicit anchors.  (Path environments and the "bind"
2623    option to "cm" have yet to be documented.)
2624    
2625    ----------------------------------------------------------------------
2626    Name: Matthias Blume
2627    Date: 2000/06/19 11:05:00 JST
2628    Tag: blume-20000619-chdir-bugfix
2629    Description:
2630    
2631    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
2632    
2633    ----------------------------------------------------------------------
2634    Name: Matthias Blume
2635    Date: 2000/06/18 22:00:10 JST
2636    Tag: blume-20000618-implicit-anchors-really-gone
2637    Description:
2638    
2639    I updates the previous HISTORY entry where I forgot to mention that
2640    implicit anchors are no longer with us.
2641    
2642    The current update also gets rid of the (now useless) controller
2643    CM.Control.implicit_anchors.
2644    
2645    ----------------------------------------------------------------------
2646    Name: Matthias Blume
2647    Date: 2000/06/16 17:30:00 JST
2648    Tag: blume-20000616-anchorenv
2649    Description:
2650    
2651    This patch implements the long anticipated (just kidding :) "anchor
2652    environment" mechanism.  In the course of doing this, I also
2653    re-implemented CM's internal "SrcPath" module from scratch.  The new
2654    one should be more robust in certain boundary cases.  In any case, it
2655    is a lot cleaner than its predecessor (IMHO).
2656    
2657    This time, although there is yet another boot file format change, I
2658    kept the unpickler backward-compatible.  As a result, no new bootfiles
2659    are necessary and bootstrapping is straightforward.  (You cannot read
2660    new bootfiles into an old system, but the other way around is no
2661    problem.)
2662    
2663    Visible changes:
2664    
2665    ** 0. Implicit path anchors (without the leading $-symbol) are no
2666    longer recognized at all. This means that such path names are not
2667    illegal either.  For example, the name basis.cm simply refers to a
2668    local file called "basis.cm" (i.e, the name is an ordinary path
2669    relative to .cm-files directory).  Or, to put it differently, only
2670    names that start with $ are anchored paths.
2671    
2672    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
2673    vanished.
2674    
2675    John (Reppy) had critizised this as soon as I originally proposed and
2676    implemented it, but at that time I did not really deeply believe
2677    him. :) Now I came full-circle because I need the $<singlearc> syntax
2678    in another place where it cannot be seen as an abbreviation for
2679    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
2680    seems to mean (i.e., it "expands" into the corresponding anchor
2681    value).
2682    
2683    However, when paths are used as members in CM description files, it
2684    continues to be true that there must be at least another arc after the
2685    anchor.  This is now enforced separately during semantic analysis
2686    (i.e., from a lexical/syntactical point of view, the notation is ok.)
2687    
2688    ** 2. The "cm" class now accepts an option "bind".  The option's value
2689    is a sub-option list of precisely two items -- one labeled "anchor"
2690    and the other one labeled "value".  As you might expect, "anchor" is
2691    used to specify an anchor name to be bound, and "value" specifies what
2692    the anchor is being bound to.
2693    
2694    The value must be a directory name and can be given in either standard
2695    syntax (including the possibility that it is itself an anchored path)
2696    or native syntax.
2697    
2698    Examples:
2699    
2700       foo.cm (bind:(anchor:bar value:$mystuff/bar))
2701       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
2702    
2703    and so on.
2704    
2705    The meaning of this is that the .cm-file will be processed with an
2706    augmented anchor environment where the given anchor(s) is/are bound to
2707    the given values(s).
2708    
2709    The rationale for having this feature is this: Suppose you are trying
2710    to use two different (already stable) libraries a.cm and b.cm (that
2711    you perhaps didn't write yourself).  Further, suppose each of these
2712    two libraries internally uses its own auxiliary library $aux/lib.cm.
2713    Normally you would now have a problem because the anchor "lib" can not
2714    be bound to more than one value globally.  Therefore, the project that
2715    uses both a.cm and b.cm must locally redirect the anchor to some other
2716    place:
2717    
2718       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
2719       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
2720    
2721    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
2722    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
2723    
2724    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
2725    you when you do so at the time of CM.stabilize).  Therefore, you can
2726    also use an anchored path as the value:
2727    
2728      a.cm (bind:(anchor:lib value:$a-lib))
2729      b.cm (bind:(anchor:lib value:$b-lib))
2730    
2731    Now you can globally configure (using the usual CM.Anchor.anchor or
2732    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
2733    itself is always locally bound, setting it globally is no longer
2734    meaningful or necessary (but it does not hurt either).  In fact, "lib"
2735    can still be used as a global anchor for separate purposes.  As a
2736    matter of fact, one can locally define "lib" in terms of a global
2737    "lib":
2738    
2739      a.cm (bind:(anchor:lib value:$lib/a))
2740      b.cm (bind:(anchor:lib value:$lib/b))
2741    
2742    ** 3: The encoding of path names has changed.  This affects the way
2743    path names are shown in CM's progress report and also the internal
2744    protocol encoding used for parallel make.
2745    
2746    The encoding now uses one or more ':'-separated segments.  Each
2747    segments corresponds to a file that has been specified relative to the
2748    file given by its preceding segment.  The first segment is either
2749    relative to the CWD, absolute, or anchored.  Each segment itself is
2750    basically a Unix pathname; all segments but the first are relative.
2751    
2752    Example:
2753    
2754       $foo/bar/baz.cm:a/b/c.sml
2755    
2756    This path denotes the file bar/a/b/c.sml relative to the directory
2757    denoted by anchor "foo".  Notice that the encoding also includes
2758    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
2759    paths are resolved relative to the .cm-files directory, so baz.cm must
2760    be ignored to get the "real" pathname.
2761    
2762    To make this fact more obvious, CM puts the names of such "virtual
2763    arcs" into parentheses when they appear in progress reports. (No
2764    parentheses will appear in the internal protocol encoding.)  Thus,
2765    what you really see is:
2766    
2767      $foo/bar/(baz.cm):a/b/c.sml
2768    
2769    I find this notation to be much more informative than before.
2770    
2771    Another new feature of the encoding is that special characters
2772    including parentheses, colons, (back)slashes, and white space are
2773    written as \ddd (where ddd is the decimal encoding of the character).
2774    
2775    *** The CM manual still needs to be updated.
2776    
2777    ----------------------------------------------------------------------
2778    Name: Allen Leung
2779    Date: 2000/06/15 00:38:00
2780    Tag: leunga-20000615-x86-peephole
2781    
2782    x86 Peephole fix by Fermin.  Affects c-- and moby only.
2783    
2784    ----------------------------------------------------------------------
2785    Name: Matthias Blume
2786    Date: 2000/06/12 11:40:00
2787    Tag: blume-20000612-parmakefix
2788    Description:
2789    
2790    More cleanup after changing the file naming scheme: This time I
2791    repaired the parallel make mechanism for CMB.make which I broke earlier.
2792    
2793    ----------------------------------------------------------------------
2794    Name: Allen Leung
2795    Date: 2000/06/09 01:25:00
2796    Tag: leunga-20000609-various
2797    
2798    None of these things should affect normal SML/NJ operations
2799    
2800    1. Peephole improvements provided by Fermin (c--)
2801    2. New annotation DEFUSE for adding extra dependence (moby)
2802    3. New X86 LOCK instructions (moby)
2803    4. New machine description language for reservation tables (scheduling)
2804    5. Fixes to various optimization/analysis modules (branch chaining, dominator
2805       trees etc.)
2806    6. I've changed the CM files so that they can work with versions
2807       110.0.6, 110.25 and 110.28
2808    
2809    ----------------------------------------------------------------------
2810    Name: Matthias Blume
2811    Date: 2000/06/09 12:40:00
2812    Tag: blume-20000609-log
2813    Description:
2814    
2815    - Removed all(?) remaining RCS Log entries from sources.
2816    
2817    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
2818      anchored paths).
2819    
2820    ----------------------------------------------------------------------
2821    Name: Matthias Blume
2822    Date: 2000/06/07 17:00:00 JST
2823    Tag: blume-20000607-no-implicit-anchors
2824    Description:
2825    
2826    1. This update changes the default setting for
2827    CM.Control.implicit_anchors from true to false.  This means that
2828    implicit anchors are no longer permitted by default.  I also tried to
2829    make sure that nothing else still relies on implicit anchors.
2830    (This is the next step on the schedule towards a CM that does not even
2831    have the notion of implicit anchors anymore.)
2832    
2833    2. More CM manual updates.
2834    
2835    3. I managed to track down and fix the pickling bug I mentioned last
2836    time.  Because of the previously existing workaround, this entails no
2837    immediate practical changes.
2838    
2839    ----------------------------------------------------------------------
2840    Name: Matthias Blume
2841    Date: 2000/06/06 11:15:00 JST
2842    Tag: blume-20000606-lazierpickle
2843    Description:
2844    
2845    !!!! NEW BOOT FILES !!!!
2846    
2847    * The main purpose of this update is to make library pickles lazier in
2848    order to reduce the initial space penalty for autoloading a library.
2849    As a result, it is now possible to have $smlnj/compiler.cm
2850    pre-registered.  This should take care of the many complaints or
2851    inquiries about missing structure Compiler.  This required changes to
2852    CM's internal data structures and small tweaks to some algorithms.
2853    
2854    As a neat additional effect, it is no longer necessary (for the sake
2855    of lean heap image files) to distinguish between a "minimal" CM and a
2856    "full" CM.  Now, there is only one CM (i.e., the "full" version:
2857    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
2858    interactive top level. ($smlnj/cm/minimal.cm is gone.)
2859    
2860    To make the life of compiler-hackers easier, "makeml" now also
2861    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
2862    words, after you bootstrap a new sml for the first time, you will not
2863    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
2864    around you will still have to do it, though.)
2865    
2866    * A second change consists of major updates to the CM manual.  There
2867    are now several appendices with summary information and also a full
2868    specification of the CM description file syntax.
2869    
2870    * In directory src/system I added the script "allcross".  This script
2871    invokes sml and cross-compiles the compiler for all supported
2872    architectures.  (Useful when providing a new set of boot files.)
2873    
2874    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
2875    added a small tweak to pickle-util.sml to work around this problem,
2876    but it is not a proper fix yet.  I will investigate further.  (The
2877    effect of the bug was an inflation of library pickle size.)
2878    
2879    * Version number increased to 110.28.1 (to avoid compatibility problems).
2880    
2881    ----------------------------------------------------------------------
2882    Name: Allen Leung
2883    Date: 2000/05/25 17:28 EDT
2884    Tag: leunga-20000525-ra
2885    Description:
2886    
2887      Fixed a bug in freezing phase of the register allocator.
2888    
2889    ----------------------------------------------------------------------
2890    Name: Allen Leung
2891    Date: 2000/05/15 22:53 EDT
2892    Tag: leunga-20000515-alpha-x86-ra
2893    Description:
2894    
2895      1. Alpha
2896    
2897          Slight cleanup.  Removed the instruction SGNXL
2898    
2899      2. X86
2900    
2901          Added the following instructions to the instruction set:
2902    
2903            ROLx, RORx,
2904            BTx, BTSx, BTLx, BTRx,
2905            XCHGx, and variants with the LOCK prefix
2906    
2907      3. Register Allocation
2908    
2909          The module ra-rewrite-with-renaming has been improved.
2910    
2911      These have no effect on SML/NJ.
2912    
2913    ----------------------------------------------------------------------
2914    Name: Matthias Blume
2915    Date: 2000/05/15 16:20:00 JST
2916    Tag: blume-20000515-lightrebuild
2917    Description:
2918    
2919    1. I added an alternative to "-rebuild" to "makeml".  The difference is
2920       that prior to calling CMB.make' the CM-variable "LIGHT" will be
2921       defined.  In effect, the command will not build any cross-compiler
2922       backends and therefore finish more quickly.
2923    
2924       The "fixpt" script also takes a "-light" switch to be able to use
2925       this new facility while compiling for a fixpoint.
2926    
2927    2. I replaced all mentions of anchored paths in group owner specifications
2928       with simple relative paths (usually starting with "..").
2929       The rationale is that a library's internal workings should not be
2930       compromised by the lack of some anchor.  (An anchor is necessary
2931       for someone who wants to refer to the library by an anchored path,
2932       but it should not be necessary to build the same library in the first
2933       place.)
2934    
2935    3. I changed the way CM's tool mechanism determines the shell command
2936       string used for things like ml-yacc etc. so that it does not break
2937       when CM.Control.implicit_anchors is turned off.
2938    
2939    ----------------------------------------------------------------------
2940    Name: Matthias Blume
2941    Date: 2000/05/12 18:20:00 JST
2942    Tag: blume-20000512-ml-build
2943    Description:
2944    
2945    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
2946    getting installed properly (by config/install.sh).
2947    
2948    ----------------------------------------------------------------------
2949    Name: Matthias Blume
2950    Date: 2000/05/12 17:30:00 JST
2951    Tag: blume-20000512-anchors
2952    Description:
2953    
2954    !!! NEW BOOT FILES !!!
2955    
2956    This change is in preparation of fading out support for "implicitly
2957    anchored path names".  I went through all sources and used the
2958    explicit (and relatively new) $-notation.  See system/README and the
2959    CM manual for more info on this.
2960    
2961    I also modified the anchoring scheme for some things such as "smlnj",
2962    "MLRISC", "cm", etc. to take advantage of the fact that explicit
2963    anchors are more expressive: anchor name and first arc do not have to
2964    coincide.  This entails the following user-visible change:
2965    
2966    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
2967    particular, when you fire up sml with a command-line argument, say,
2968    e.g.:
2969    
2970       sml '$smlnj/cmb.cm'
2971    
2972    At the ML toplevel prompt:
2973    
2974       CM.autoload "$smlnj/cmb.cm";
2975    
2976    There is also a new controller in CM.Control that can be used to turn
2977    off all remaining support for implicit anchors by saying:
2978    
2979        CM.autoload "$smlnj/
2980        #set CM.Control.implicit_anchors false;
2981    
2982    This causes CM to reject implicitly anchored paths.  This is (for the
2983    time being) less permissive than the "final" version where there will
2984    be no more such implicit anchors and relative paths will be just that:
2985    relative.
2986    
2987    The next step (version after next version?) will be to make the
2988    default for CM.Control.implicit_anchors false.  After the dust has
2989    settled, I can then produce the "final" version of this...
2990    
2991    Note: Since bootstrapping is a bit tricky, I provided new boot files.
2992    
2993    ----------------------------------------------------------------------
2994    Name: Matthias Blume
2995    Date: 2000/05/11 16:30:00 JST
2996    Tag: blume-20000511-sources
2997    Description:
2998    
2999    The main change is that I added function CM.sources as a generalized
3000    version of the earlier CM.makedepend.  This entails the following
3001    additional changes:
3002    
3003      - CM.makedepend has been dropped.
3004    
3005      - CM manual has been updated.
3006    
3007      - TOOLS signature and API have been changed.
3008    
3009    ----------------------------------------------------------------------
3010    Name: Allen Leung
3011    Date: 2000/05/10 21:17 EDT
3012    Tag: leunga-20000510-moby-c--ssa
3013    Description:
3014    
3015      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
3016    None of these affect SML/NJ.
3017    
3018    1. Register Allocation
3019    
3020        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
3021           This module tries to remove local (i.e. basic block level) redundancies
3022           during spilling.
3023    
3024        b. A new framework for performing region based register allocation.
3025           Not yet entirely functional.
3026    
3027    2. X86
3028    
3029       a. DefUse for POP was missing the stack pointer [found by Lal]
3030       b. Reload for CALL was incorrect in X86Spill [found by John]
3031       c. Various fixes in X86Spill so that it can be used correctly for
3032          the new spilling module.
3033    
3034    3. SSA/IR
3035    
3036       a. New module ir/dj-dataflow.sml implements elimination based
3037          data flow analysis.
3038    
3039    4. MLRiscGen
3040    
3041       a. Fix for gc type annotation
3042    
3043    5. MDGen
3044    
3045       Various fixes for machine description -> ml code translation.  For ssa
3046       only.
3047    
3048    ----------------------------------------------------------------------
3049    Name: Allen Leung
3050    Date: 2000/05/08 22:17 EDT
3051    Tag: leunga-20000508-labexp
3052    Description:
3053    
3054      Fermin has found a few assembly problems with constant expressions
3055      generated in LabelExp.  Mostly, the problems involve extra parentheses,
3056      which choke on dumb assemblers.  This is his fix.
3057    
3058    ----------------------------------------------------------------------
3059    Name: Dave MacQueen
3060    Date: 2000/04/09 14:00 EDT
3061    Tag: dbm-20000502-Version_110_28
3062    Description:
3063    
3064    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
3065    
3066    2. Updated config/version to 110.28
3067    
3068    3. Updated config/srcarchiveurl
3069    
3070    3. New boot files!
3071       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
3072    
3073    ----------------------------------------------------------------------
3074    Name: Matthias Blume
3075    Date: 2000/05/01 19:05:00 JST
3076    Tag: blume-20000501-noweb
3077    Description:
3078    
3079    A new noweb tool has been added.  The existing system is entirely
3080    unaffected by this, but some CM users have asked for renewed noweb
3081    support.  Everything is documented in the CM manual.
3082    
3083    New (plugin) libraries:
3084    
3085       noweb-tool.cm
3086       nw-ext.cm
3087    
3088    ----------------------------------------------------------------------
3089    Name: Dave MacQueen
3090    Date: 2000/04/30 12:40PM EDT
3091    Tag: dbm-20000430-bug_fixes
3092    Description:
3093    
3094    1. Fix for bug 1498
3095       smlnj/src/system/Basis/Implementation/Unsafe/object.sig
3096       smlnj/src/system/Basis/Implementation/Unsafe/object.sml
3097         added toRealArray function
3098       smlnj/src/compiler/MiscUtil/print/ppobj.sml
3099         added check for tag Obj.RealArray to array printing case in ppObj
3100    
3101    2. Fix for bug 1510
3102       smlnj/src/compiler/Semant/types/typesutil.sml
3103         fixed definition of dummyargs (used by equalTycon) so that
3104         dummy args are distinct types
3105    
3106    ----------------------------------------------------------------------
3107    Name: Matthias Blume
3108    Date: 2000/04/30 01:00:00 JST
3109    Tag: blume-20000430-versions
3110    Description:
3111    
3112    1. CM version numbering added.  This is an implementation of Lal's
3113       proposal for adding version numbers and version checking to .cm
3114       files.  Lal said that his proposal was just that -- a proposal.
3115       For the time being I went ahead and implemented it so that people
3116       can comment on it.  Everything is completely backward-compatible
3117       (except for the stable library format, i.e., new bootfiles!).
3118    
3119       As usual, see the CM manual for details.
3120    
3121    2. An alternative syntax for anchored paths has been implemented.
3122       Dave has recently voiced the same concerns that I had when I did
3123       this, so there should be some support.  My take is that eventually
3124       I will let support for the current syntax (where anchors are
3125       "implicit") fade out in favor of the new, explicit syntax.
3126       In order to be backward-compatible, both old and new syntax are
3127       currently supported.
3128    
3129       Again, see the CM manual for details.
3130    
3131    3. Parallel make is trying to be slightly smarter:  When the master
3132       process finds a "bottleneck", i.e., when there is only one
3133       compilation unit that can be compiled and everybody else is
3134       waiting on it, then it will simply compile it directly instead
3135       of clumsily telling one of the slaves to do it.
3136    
3137    4. Support for "unsharing" added.  This is necessary in order to be
3138       able to have two different versions of the same library running
3139       at the same time (e.g., for trying out a new MLRISC while still
3140       having the old MLRISC linked into the current compiler, etc.)
3141       See the CM manual.
3142    
3143    5. Simple "makedepend" functionality added for generating Makefile
3144       dependency information.  (This is rather crude at the moment.
3145       Expect some changes here in the future.)
3146    
3147    6. ".fun" added as a recognized suffix for ML files. Also documented
3148       explicitly in the manual that the fallback behavior (unknown suffix
3149       -> ML file) is not an official feature!
3150    
3151    7. Small changes to the pickler for stable libraries.
3152    
3153    8. Several internal changes to CM (for cleanup/improvement).
3154    
3155    
3156    !!!! NEW BINFILES !!!!
3157    
3158    ----------------------------------------------------------------------
3159    Name: Matthias Blume
3160    Date: 2000/04/28 17:30:00 JST
3161    Tag: blume-20000428-pathconfig
3162    Description:
3163    
3164    1. I changed config/install.sh to remove duplicate entries from the
3165       lib/pathconfig file at the end.  Moreover, the final version of
3166       lib/pathconfig is sorted alphabetically.  The same (sorting) is done
3167       in src/system/installml.
3168    
3169    2. The config/install.sh script now consistently uses relative
3170       pathnames in lib/pathconfig whenever the anchor is in the lib
3171       directory.  (So far this was true for the libraries that come
3172       pre-compiled and bundled as part of the bootfiles but not for
3173       libraries that are compiled by the script itself.)
3174    
3175    ----------------------------------------------------------------------
3176    Name: Matthias Blume
3177    Date: 2000/04/26 13:10:00 JST
3178    Tag: blume-20000426-fun_suffix
3179    Description:
3180    
3181    Added ".fun" as a recognized file name suffix (for ML code).
3182    
3183    ----------------------------------------------------------------------
3184    Name: Allen Leung
3185    Date: 2000/04/25 17:00:00 EST
3186    Tag: leunga-20000425-alpha-ra
3187    Description:
3188    
3189    1. Alpha
3190    
3191        PSEUDOARITH was missing in AlphaRewrite.  This causes an endless loop
3192    in C--.
3193    
3194    2. RA
3195    
3196       Added a flag "ra-dump-size" to print out the size of the flowgraph
3197       and the interference graph.
3198    
3199    ----------------------------------------------------------------------
3200    Name: Dave MacQueen
3201    Date: 2000/04/25/
3202    Tag: dbm-20000425-mlyacc_doc_examples
3203    Description:
3204      Updated mlyacc.tex sections 5 and 7 for SML '97 and CM.
3205      Updated all three examples in src/ml-yacc/examples to run
3206      under 110.* using CM.make.
3207    
3208    ----------------------------------------------------------------------
3209    Name: Allen Leung
3210    Date: 2000/04/20 23:04:00 EST
3211    Tag: leunga-20000420-ssa-c---stuff
3212    Description:
3213    
3214      This update synchronizes my repository with Yale's.  Most of these
3215    changes, however, do not affect SML/NJ at all (the RA is an exception).
3216    
3217    1. Register Allocator
3218    
3219       a. An improvement in the interference graph construction:
3220          Given a copy
3221    
3222                s <- t
3223    
3224          no interference edge between s and t is added for this definition of s.
3225    
3226       b. I've added two new spill heuristic modules that Fermin and I developed
3227          (in the new library RA.cm). These are unused in SML/NJ but maybe
3228          useful for others (Moby?)
3229    
3230    2. X86
3231    
3232       a. Various fixes in the backend provided by Fermin [C--] and Lal.
3233    
3234    3. Alpha
3235    
3236       a. Added the BSR instruction and code generation that goes with it [C--]
3237       b. Other fixes too numerous to recount provided by Fermin [C--]
3238    
3239    4. Regmaps
3240    
3241       a. The regmaps are not initialized with the identity physical bindings
3242          at creation time.  This is unneeded.
3243    
3244    5. MLRISC Optimizations
3245    
3246       a. The DJ-Graph module can now compute the iterated dominance frontiers
3247          intersects with liveness incrementally in linear time! Woohoo!
3248          This is now used in my new SSA construction algorithm.
3249    
3250       b. THe branch reorganization module is now smarter about linear chains of
3251          basic blocks.
3252    
3253    
3254    ----------------------------------------------------------------------
3255    Name: Matthias Blume
3256    Date: 2000/04/12 13:52:00 JST
3257    Tag: blume_main_v110p27_1
3258    Description:
3259    
3260    Changed install.sh script to handle archive files without version number
3261    and to use "boot.<arch>-<os>" instead of "sml.boot.<arch>-<os>" for the
3262    name of the boot file archive.
3263    
3264    ----------------------------------------------------------------------
3265    Name: Dave MacQueen
3266    Date: 2000/04/09 14:00 EDT
3267    Tag: dbm-20000410-Version_110_27
3268    Description:
3269    
3270    1. Updated src/compiler/TopLevel/main/version.sml to version 110.27
3271    
3272    2. Updated src/config/version to 110.27
3273    
3274    3. New boot files!
3275    
3276    ----------------------------------------------------------------------
3277    Name: Allen Leung
3278    Date: 2000/04/09 19:09:00 EST
3279    Tag: leunga-20000409-misc
3280    Description:
3281    
3282    1.  Yet another fix for x86 assembly for idivl, imull, mull and friends.
3283    
3284    2.  Miscellaneous improvements to MLRISC (unused in sml/nj)
3285    
3286    ----------------------------------------------------------------------
3287    Name: Stefan
3288    Date: 2000/04/07 10:00:00 EDT
3289    Tag: monnier-20000406-branch-handling
3290    Description:
3291    
3292    Improved handling of branches (mostly those generated from
3293    polymorphic equality), removed switchoff and changed the
3294    default optimization settings (more cpsopt and less flintopt).
3295    
3296    ----------------------------------------------------------------------
3297    Name: Allen Leung
3298    Date: 2000/04/06 01:30:00 EST
3299    Tag: leunga-20000406-peephole-x86-SSA-2
3300    Description:
3301    
3302       Forgot a few files.
3303    
3304    ----------------------------------------------------------------------
3305    Name: Allen Leung
3306    Date: 2000/04/06 00:36:00 EST
3307    Tag: leunga-20000406-peephole-x86-SSA
3308    Description:
3309    
3310    1.  New Peephole code
3311    
3312    2.  Minor improvement to X86 instruction selection
3313    
3314    3.  Various fixes to SSA and machine description -> code translator
3315    
3316    ----------------------------------------------------------------------
3317    Name: Matthias Blume
3318    Date: 2000/04/05 12:30:00 JST
3319    Tag: blume_main_v110p26p2_3
3320    Description:
3321    
3322    This update just merges three minor cosmetic updates to CM's sources
3323    to get ready for the 110.27 code freeze on Friday.  No functionality
3324    has changed.
3325    
3326    ----------------------------------------------------------------------
3327    Name: Allen Leung
3328    Date: 2000/04/04 19:39:00 EST
3329    Tag: leunga-20000404-x86-asm
3330    Description:
3331    
3332    1.  Fixed a problem in X86 assembly.
3333    
3334        Things like
3335    
3336           jmp %eax
3337           jmp (%eax)
3338    
3339        should be output as
3340    
3341           jmp *%eax
3342           jmp *(%eax)
3343    
3344    2.  Assembly output
3345    
3346          Added a new flag
3347    
3348              "asm-indent-copies" (default to false)
3349    
3350          When this flag is on, parallel copies will be indented an extra level.
3351    
3352    ----------------------------------------------------------------------
3353    Name: Allen Leung
3354    Date: 2000/04/04 03:18:00 EST
3355    Tag: leunga-20000404-C--Moby
3356    Description:
3357    
3358        All of these fixes are related to C--, Moby, and my own optimization
3359        stuff; so they shouldn't affect SML/NJ.
3360    
3361    1.  X86
3362    
3363        Various fixes related floating point, and extensions.
3364    
3365    2.  Alpha
3366    
3367        Some extra patterns related to loads with signed/zero extension
3368        provided by Fermin.
3369    
3370    3.  Assembly
3371    
3372        When generating assembly, resolve the value of client defined constants,
3373        instead of generating symbolic values.  This is controlled by the
3374        new flag "asm-resolve-constants", which is default to true.
3375    
3376    4.  Machine Descriptions
3377    
3378        a. The precedence parser was slightly broken when parsing infixr symbols.
3379        b. The type generalizing code had the bound variables reversed, resulting
3380           in a problem during arity raising.
3381        c. Various fixes in machine descriptions.
3382    
3383    ----------------------------------------------------------------------
3384    Name: Matthias Blume
3385    Date: 2000/04/03 16:05:00 JST
3386    Tag: blume_main_v110p26p2_2
3387    Description:
3388    
3389    I eliminated coreEnv from compInfo.  Access to the "Core" structure is
3390    now done via the ordinary static environment that is context to each
3391    compilation unit.
3392    
3393    To this end, I arranged that instead of "structure Core" as "structure
3394    _Core" is bound in the pervasive environment.  Core access is done via
3395    _Core (which can never be accidentally rebound because _Core is not a
3396    legal surface-syntax symbol).
3397    
3398    The current solution is much cleaner because the core environment is
3399    now simply part of the pervasive environment which is part of every
3400    compilation unit's context anyway.  In particular, this eliminates all
3401    special-case handling that was necessary until now in order to deal
3402    with dynamic and symbolic parts of the core environment.
3403    
3404    Remaining hackery (to bind the "magic" symbol _Core) is localized in the
3405    compilation manager's bootstrap compiler (actually: in the "init group"
3406    handling).  See the comments in src/system/smlnj/init/init.cmi for
3407    more details.
3408    
3409    I also tried to track down all mentions of "Core" (as string argument
3410    to Symbol.strSymbol) in the compiler and replaced them with a
3411    reference to the new CoreSym.coreSym.  Seems cleaner since the actual
3412    name appears in one place only.
3413    
3414    Binfile and bootfile format have not changed, but the switchover from
3415    the old "init.cmi" to the new one is a bit tricky, so I supplied new
3416    bootfiles anyway.
3417    
3418    ----------------------------------------------------------------------
3419    Name: Allen Leung
3420    Date: 2000/04/02 21:17:00 EST
3421    Tag: leunga-20000402-mltree
3422    Description:
3423    
3424       1. Renamed the constructor CALL in MLTREE by popular demand.
3425       2. Added a bunch of files from my repository.  These are currently
3426          used by other non-SMLNJ backends.
3427    
3428    ----------------------------------------------------------------------
3429    Name: Allen Leung
3430    Date: 2000/03/31 21:15:00 EST
3431    Tag: leunga-20000331-aliasing
3432    Description:
3433    
3434    This update contains a rewritten (and hopefully more correct) module
3435    for extracting aliasing information from CPS.
3436    
3437       To turn on this feature:
3438    
3439            Compiler.Control.CG.memDisambiguate := true
3440    
3441       To pretty print the region information with assembly
3442    
3443           Compiler.Control.MLRISC.getFlag "asm-show-region" := true;
3444    
3445       To control how many levels of aliasing information are printed, use:
3446    
3447           Compiler.Control.MLRISC.getInt "points-to-show-level" := n
3448    
3449       The default of n is 3.
3450    
3451    ----------------------------------------------------------------------
3452  Name: David MacQueen  Name: David MacQueen
3453  Date: 2000/03/31 11:15:00 EST  Date: 2000/03/31 11:15:00 EST
3454  Tag: dbm-20000331-runtime_fix  Tag: dbm-20000331-runtime_fix
# Line 81  Line 3517 
3517     (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
3518     used).     used).
3519    
3520     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
3521     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
3522     Makefiles or Shell scripts.     Makefiles or Shell scripts.
3523    
3524     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 94  Line 3530 
3530    
3531     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
3532    
3533     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
3534     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
3535    
3536  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 125  Line 3561 
3561       elaborator). There were a lot of changes during my "linkpath" trials       elaborator). There were a lot of changes during my "linkpath" trials
3562       that could have been reverted to their original state but weren't.       that could have been reverted to their original state but weren't.
3563       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
3564       than what was strictly necessary...  (I _did_ resist the tempation       than what was strictly necessary...  (I _did_ resist the temptation
3565       of doing any "global reformatting" to avoid an untimely death at       of doing any "global reformatting" to avoid an untimely death at
3566       Dave's hands. :)       Dave's hands. :)
3567    
# Line 228  Line 3664 
3664    
3665       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
3666       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
3667       testl is perferable to andl.       testl is preferable to andl.
3668    
3669  7. RA (x86 only)  7. RA (x86 only)
3670    
# Line 410  Line 3846 
3846    
3847  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
3848  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
3849  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
3850  explanation.  explanation.
3851    
3852  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
3853  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
3854  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
3855  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 457  Line 3893 
3893  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
3894  <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,
3895  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
3896  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
3897  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
3898  and, thus, saves a lot of time.  and, thus, saves a lot of time.
3899    
# Line 507  Line 3943 
3943    it from that remote directory.    it from that remote directory.
3944    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
3945    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
3946    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
3947    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
3948    
3949    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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