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