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revision 634, Mon May 1 10:03:50 2000 UTC revision 842, Tue Jun 19 21:24:35 2001 UTC
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11  Date:  Date:
12  Tag: <post-commit CVS tag>  Tag: <post-commit CVS tag>
13  Description:  Description:
14    
15    ----------------------------------------------------------------------
16    Name: Matthias Blume
17    Date: 2001/06/19 17:25:00 EDT
18    Tag: blume-20010619-signals
19    Description:
20    
21    This should (hopefully) fix the long-standing signal handling bug.
22    (The runtime system was constructing a continuation record with an
23    incorrect descriptor which would cause the GC to drop data on the floor...)
24    
25    ----------------------------------------------------------------------
26    Name: Matthias Blume
27    Date: 2001/06/15 15:05:00 EDT
28    Tag: blume-20010615-moresparc
29    Description:
30    
31    Here is a short late-hour update related to Sparc c-calls:
32    
33     -- made handling of double-word arguments a bit smarter
34    
35     -- instruction selection phase tries to collapse certain clumsily
36        constructed ML-Trees; typical example:
37    
38            ADD(ty,ADD(_,e,LI d1),LI d2)  ->  ADD(ty,e,LI(d1+d2))
39    
40        This currently has no further impact on SML/NJ since mlriscGen does
41        not seem to generate such patterns in the first place, and c-calls
42        (which did generate them in the beginning) has meanwhile been fixed
43        so as to avoid them as well.
44    
45    ----------------------------------------------------------------------
46    Name: Matthias Blume
47    Date: 2001/06/15 15:05:00 EDT
48    Tag: blume-20010615-sparc
49    Description:
50    
51    The purpose of this update is to provide an implementation of NLFFI
52    on Sparc machines.
53    
54    Here are the changes in detail:
55    
56       * src/MLRISC/sparc/c-calls/sparc-c-calls.sml is a new file containing
57       the Sparc implementation of the c-calls API.
58       * The Sparc backend of SML/NJ has been modified to uniformely use %fp
59       for accessing the ML frame.  Thus, we have a real frame pointer and
60       can freely modify %sp without need for an omit-frame-ptr phase.
61       The vfp logic in src/compiler/CodeGen/* has been changed to accomodate
62       this case.
63       * ml-nlffigen has been taught to produce code for different architectures
64       and calling conventions.
65       * In a way similar to what was done in the x86 case, the Sparc
66       backend uses its own specific extension to mltree.  (For example,
67       it needs to be able to generate UNIMP instructions which are part
68       of the calling convention.)
69       * ml-nlffi-lib was reorganized to make it more modular (in particular,
70       to make it easier to plug in new machine- and os-dependent parts).
71    
72    There are some other fairly unrelated bug fixes and cleanups as well:
73    
74       * I further hacked the .cm files for MLRISC tools (like MDLGen) so
75       that they properly share their libraries with existing SML/NJ libraries.
76       * I fixed a minor cosmetic bug in CM, supressing certain spurious
77       follow-up error messages.
78       * Updates to CM/CMB documentation.
79    
80    TODO items:
81    
82       * MLRISC should use a different register as its asmTemp on the Sparc.
83         (The current %o2 is a really bad choice because it is part of the
84         calling conventions, so things might interfere in unexpected ways.)
85    
86    ----------------------------------------------------------------------
87    Name: Matthias Blume
88    Date: 2001/06/07
89    Tag: blume-20010607-calls
90    Description:
91    
92    A number of internal changes related to C calls and calling conventions:
93    
94    1. ML-Tree CALL statements now carry a "pops" field.  It indicates the
95       number of bytes popped implicitly (by the callee).  In most cases
96       this field is 0 but on x86/win32 it is some non-zero value.  This
97       is information provided for the benefit of the "omit-frameptr" pass.
98    2. The CALL instruction on the x86 carries a similar "pops" field.
99       The instruction selection phase copies its value from the ML-Tree
100       CALL statement.
101    3. On all other architectures, the instruction selection phase checks
102       whether "pops=0" and complains if not.
103    4. The c-calls implementation for x86 now accepts two calling conventions:
104       "ccall" and "stdcall".  When "ccall" is selected, the caller cleans
105       up after the call and pops is set to 0.  For "stdcall", the caller
106       does nothing, leaving the cleanup to the callee; pops is set to
107       the number of bytes that were pushed onto the stack.
108    5. The cproto decoder (compiler/Semant/types/cproto.sml) now can
109       distinguish between "ccall" and "stdcall".
110    6. The UNIMP instruction has been added to the supported Sparc instruction
111       set. (This is needed for implementing the official C calling convention
112       on this architecture.)
113    7. I fixed some of the .cm files under src/MLRISC/Tools to make them
114       work with the latest CM.
115    
116    ----------------------------------------------------------------------
117    Name: Matthias Blume
118    Date: 2001/06/05 15:10:00 EDT
119    Tag: blume-20010605-cm-index
120    Description:
121    
122    0. The "lambdasplit" parameter for class "sml" in CM has been documented.
123    
124    1. CM can now generate "index files".  These are human-readable files
125       that list on a per-.cm-file basis each toplevel symbol defined or
126       imported.  The location of the index file for
127       <p>/<d>.cm is <p>/CM/INDEX/<d>.cm.
128       To enable index-file generation, set CM.Control.generate_index to true
129       or export an environment-symbol: export CM_GENERATE_INDEX=true.
130    
131       The CM manual has been updated accordingly.
132    
133    2. I made some slight modifications to the c-calls API in MLRISC.
134    
135         a) There is now a callback to support saving/restoring of
136            dedicated but caller-save registers around the actual call
137            instruction.
138         b) One can optionally specify a comment-annotation for the
139            call instruction.
140    
141    3. SML/NJ (mlriscGen.sml) uses this new API for the rawccall primop.
142       (For example, the comment annotation shows the C prototype of
143        the function being called.)
144    
145    ----------------------------------------------------------------------
146    Name: Matthias Blume
147    Date: 2001/06/01 13:30:00 EDT
148    Tag: blume-20010601-nlffi-cleanup
149    Description:
150    
151    This is mostly a cleanup of MLFFI stuff:
152    
153       - some signature files have been put into a more exposed place
154       - the ugly 'f type parameter is gone (simplifies types tremendously!)
155       - ml-nlffigen changed accordingly
156       - tutorial updated
157    
158    Other changes:
159    
160       - author's affiliation in CM manual(s) updated
161       - some more recognized keywords added to Allen's sml.sty
162    
163    ----------------------------------------------------------------------
164    Name: Matthias Blume
165    Date: 2001/05/25 15:30:00 EDT
166    Tag: blume-20010525-iptr
167    Description:
168    
169      - put the official 110.33-README (as it appears on the ftp server) under
170        CVS
171      - fixed a small bug related to incomplete pointer types in
172        ml-nlffigen
173      - small cosmetic change to the ml-nlffi-lib's "arr" type constructor
174        (it does not need the 'f type parameter)
175    
176    ----------------------------------------------------------------------
177    Name: Matthias Blume
178    Date: 2001/05/23 14:30:00 EDT
179    Tag: Release_110_33
180    Description:
181    
182    New version number (110.33).  New bootfiles.
183    
184    ----------------------------------------------------------------------
185    Name: Matthias Blume
186    Date: 2001/05/22 18:06:00 EDT
187    Tag: blume-20010522-targets
188    Description:
189    
190    Made install.sh use file config/targets.customized if it exists, falling
191    back to config/targets if it doesn't.  This way one can have a customized
192    version of the targets file without touching the "real thing", thus
193    eliminating the constant fear of accidentally checking something bogus
194    back into the CVS repository...  (File config/targets.customized must
195    not be added to the repository!)
196    
197    ----------------------------------------------------------------------
198    Name: Matthias Blume
199    Date: 2001/05/22 16:30:00 EDT
200    Tag: blume-20010522-minitut
201    Description:
202    
203    1. Bug fix in ml-nlffigen; now (hopefully) correctly handling
204       struct returns.
205    2. Added src/ml-nlffi-lib/Doc/mini-tutorial.txt.  This is some very
206       incomplete, preliminary documentation for NLFFI.
207    
208    ----------------------------------------------------------------------
209    Name: Matthias Blume
210    Date: 2001/05/14 11:30:00 EDT
211    Tag: blume-20010514-script
212    Description:
213    
214    Some bugs in install script fixed.
215    
216    In addition to that I also made a slight change to the NLFFI API:
217    Functors generated by ml-nlffigen now take the dynamic library as a
218    straight functor argument, not as a suspended one.  (The original
219    functor code used to force the suspension right away anyway, so there
220    was nothing gained by this complication of the interface.)
221    
222    ----------------------------------------------------------------------
223    Name: Matthias Blume
224    Date: 2001/05/11 14:35:00 EDT
225    Tag: blume-20010511-ml-nlffi
226    Description:
227    
228    I finally took the plunge and added my new FFI code to the main
229    repository.  For x86-linux it is now ready for prime-time.
230    
231    There are two new subdirectories of "src":
232    
233      - ml-nlffi-lib:
234           The utility library for programs using the FFI interface.
235           Here is the implementation of $/c.cm and its associated low-level
236           partners $/c-int.cm and $/memory.cm.
237      - ml-nlffigen:
238           A stand-alone program for generating ML glue code from C source
239           code.
240    
241    Building ml-nlffigen requires $/ckit-lib.cm.
242    
243    The config/install.sh script has been updates to do the Right Thing
244    (hopefully).
245    
246    Notice that the source tree for the C-Kit will not be put under "src"
247    but directly under the installation root directory.  (This is the
248    structure that currently exists on the CVS server when you check out
249    module "sml".)  Fortunately, config/install.sh knows about this oddity.
250    
251    Bugs: No documentation yet.
252    
253    ----------------------------------------------------------------------
254    Name: Matthias Blume
255    Date: 2001/05/09 16:35:00 EDT
256    Tag: blume-20010509-cpscontract
257    Description:
258    
259    Fixed a bug in the accounting code in cpsopt/contract.sml.  (The
260    wrapper/unwrapper elimination did not decrement usage counts and some
261    dead variables got overlooked by the dead-up logic.)
262    
263    ----------------------------------------------------------------------
264    Name: Lal George
265    Date: 2001/05/08  17:26:09 EDT
266    Tag: george-20010508-omit-frameptr
267    Description:
268    
269    Changes to implement the omit-frame-pointer optimization to support
270    raw C calls. For now, there is only support on the Intel x86, but
271    other architectures will follow as more experience is gained with this.
272    
273    
274    ----------------------------------------------------------------------
275    Name: Matthias Blume
276    Date: 2001/05/07 14:40:00 EDT
277    Tag: blume-20010507-proxies
278    Description:
279    
280    I made into "proxy libraries" all libraries that qualify for such a
281    change.  (A qualifying library is a library that has another library or
282    groups as its sole member and repeats that member's export list
283    verbatim.  A proxy library avoids this repetition by omitting its export
284    list, effectively inheriting the list that its (only) member exports.
285    See the CM manual for more explanation.)
286    The main effect is that explicit export lists for these libraries
287    do not have to be kepts in sync, making maintenance a bit easier.
288    
289    I also added copyright notices to many .cm-files.
290    
291    Last but not least, I made a new set of bootfiles.
292    
293    ----------------------------------------------------------------------
294    Name: Matthias Blume
295    Date: 2001/05/04 17:00:00 EDT
296    Tag: blume-20010504-cm-lsplit
297    Description:
298    
299    0. John merged pending changes to $/smlnj-lib.cm
300    
301    1. Allen's previous change accidentally backed out of one of Lal's
302       earlier changes.  I undid this mistake (re-introducing Lal's change).
303    
304    2. I used the new topOrder' function from graph-scc.sml (from $/smlnj-lib.cm)
305       within the compiler where applicable.  There is some code simplification
306       because of that.
307    
308    3. The "split" phase (in FLINT) is now part of the default list of phases.
309       Compiler.Control.LambdaSplitting.* can be used to globally control the
310       lambda-splitting (cross-module-inlining) engine.  In addition to that,
311       it can now also be controlled on a per-source basis: CM has been taught
312       a new tool parameter applicable to ML source files.
313    
314       - To turn lambda-splitting off completely:
315            local open Compiler.Control.LambdaSplitting in
316                val _ = set Off
317            end
318       - To make "no lambda-splitting" the global default (but allow per-source
319         overriding); this is the initial setting:
320            local open Compiler.Control.LambdaSplitting in
321                val _ = set (Default NONE)
322            end
323       - To make "lambda-splitting with aggressiveness a" the global default
324         (and allow per-source overriding):
325            local open Compiler.Control.LambdaSplitting in
326                val _ = set (Default (SOME a))
327            end
328    
329       - To turn lambda-splitting off for a given ML souce file (say: a.sml)
330         write (in the respective .cm-file):
331            a.sml (lambdasplitting:off)
332       - To turn lambda-splitting for a.sml on with minimal aggressiveness:
333            a.sml (lambdasplitting:on)
334       - To turn lambda-splitting for a.sml on with aggressiveness <a> (where
335         <a> is a decimal non-negative integer):
336            a.sml (lambdasplitting:<a>)
337       - To turn lambda-splitting for a.sml on with maximal aggressiveness:
338            a.sml (lambdasplitting:infinity)
339       - To use the global default for a.sml:
340            a.sml (lambdasplitting:default)
341         or simply
342            a.sml
343    
344    ----------------------------------------------------------------------
345    Name: Allen Leung
346    Date: 2001/05/04 01:57:00 EDT
347    Tag: leunga-20010504-sync
348    Description:
349    
350      MLRISC features.
351    
352      1. Fix to CMPXCHG instructions.
353      2. Changed RA interface to allow annotations in callbacks.
354      3. Added a new method to the stream interface to allow annotations updates.
355    
356    ----------------------------------------------------------------------
357    Name: Matthias Blume
358    Date: 2001/05/01 11:45:00 EDT
359    Tag: blume-20010501-pcedittmp
360    Description:
361    
362    Changed install.sh to use the current working directory instead of
363    /usr/tmp for a temporary file (pcedittmp).  The previous choice
364    of /usr/tmp caused trouble with MacOS X because of file premission
365    problems.
366    
367    ----------------------------------------------------------------------
368    Name: Matthias Blume
369    Date: 2001/04/20 11:10:00 EDT
370    Tag: blume-20010420-inMLflag
371    Description:
372    
373     - added vp_limitPtrMask to vproc-state.h
374       (for use by the raw-C-calls mechanism to implement proper interrupt
375        handling)
376     - made the ML compiler aware of various data-structure offsets so it
377       can generate code for accessing the vp_inML flag and vp_limitPtrMask
378     - tweaked mlriscGen.sml to have it emit interrupt-handling code for
379       raw C-calls
380    
381    ----------------------------------------------------------------------
382    Name: Lal George
383    Date: 2001/04/20 09:15:28 EDT
384    Tag: george-20010420-macosX
385    Description:
386    
387     - Changes to port to Mac OS X; Darwin.
388    
389     - In the process I found that sqrt was broken on the PPC, because the
390       fsqrt instruction is not implemented.
391    
392    ----------------------------------------------------------------------
393    Name: Matthias Blume
394    Date: 2001/04/18 12:45:00 EDT
395    Tag: blume-20010418-ccalls
396    Description:
397    
398     - fixed two off-by-4 errors in the x86-specific c-calls implementation
399       (this bug prevented structure arguments containing pointers from being
400        passed correctly)
401     - changed the raw-C-call code in mlriscGen.sml in such a way that
402       structure arguments are represented as a pointer to the beginning
403       of the structure (instead of having a series of synthesized arguments,
404       one for each structure member)
405    
406     - made makeml script's verbosity level configurable via environment
407       variable (MAKEML_VERBOSITY)
408    
409     - eliminated placeholder implementations for f32l, w16s, i16s, and f32s
410       in rawmem-x86.sml; we are now using the real thing
411    
412    ----------------------------------------------------------------------
413    Name: Matthias Blume
414    Date: 2001/03/22 16:25:00 EST
415    Tag: blume-20010322-bootfiles
416    Description:
417    
418    Created a new set of bootfiles (for your automatic installation convenience).
419    
420    ----------------------------------------------------------------------
421    Name: Matthias Blume
422    Date: 2001/03/22 15:10:00 EST
423    Tag: blume-20010322-rawmem-parcm
424    Description:
425    
426    1. All "raw memory access" primitives for the new FFI are implemented now
427       (at least on the x86).
428    2. Some further cleanup of CM's parallel make mechanism.
429    
430    ----------------------------------------------------------------------
431    Name: Matthias Blume
432    Date: 2001/03/19 17:53:00 EST
433    Tag: blume-20010319-parallel
434    Description:
435    
436    Parallel make (using compile servers) now works again.
437    
438    To this end, CM.stabilize and CMB.make have been modified to work in
439    two passes when compile servers are attached:
440       1. Compile everything, do not perform stabilization; this pass
441          uses compile servers
442       2. Stabilize everything; this pass does not use compile servers
443    If there are no compile servers, the two passes are combined into one
444    (as before).  Splitting the passes increases the inherent parallelism
445    in the dependency graph because the entire graph including all
446    libraries is available at the same time.  This, in turn, improves
447    server utilization.  The downside is that the master process will
448    have to do some extra work after compilation is done (because for
449    technical reasons it must re-read all the binfiles during stabilization).
450    
451    ----------------------------------------------------------------------
452    Name: Matthias Blume
453    Date: 2001/03/16 12:22:00 EST
454    Tag: blume-20010316-bootfiles
455    Description:
456    
457    Created a new set of bootfiles (for your automatic installation convenience).
458    
459    ----------------------------------------------------------------------
460    Name: Matthias Blume
461    Date: 2001/03/16 11:00:00 EST
462    Tag: blume-20010316-MLTREE-fixup
463    Description:
464    
465    This is a minor fixup for an (untagged) earlier commit by Allen.
466    (A file was missing).
467    
468    ----------------------------------------------------------------------
469    Name: Allen Leung
470    Date: Mon Mar  5 18:54:57 EST 2001
471    Tag: leunga-20010305-cut-support
472    
473    1. New support for alternative control-flow in MLTREE.
474       Currently we support
475    
476          FLOW_TO(CALL ...., [k1,...,kn])
477    
478       This is needed for 'cuts to' in C-- and try/handle-like constructs
479       in Moby
480    
481       New assembler flag "asm-show-cutsto" to turn on control-flow debugging.
482    
483    2. Register Allocator
484    
485       Changes in interface [from Fermin, John]
486    
487    3. Alpha 8-bit SLL support [Fermin]
488    
489    4. All architectures
490    
491       A new module (ClusterExpandCopies) for expanding parallel copies.
492    
493    ----------------------------------------------------------------------
494    Name: Allen Leung
495    Date: 2001/02/27 23:07:00 EST
496    Tag: leunga-20010227-minor-stuff
497    
498    1. Alpha bug fix for CMOVNE
499    2. Handle mltree COND(..,FCMP ...,...)
500    3. Bug fix in simplifier
501    
502    ----------------------------------------------------------------------
503    Name: Matthias Blume
504    Date: 2001/01/30 17:50:00 EST
505    Tag: blume-20010130-sync
506    Description:
507    
508    This is just a minor update to sync my devel branch with the main brach.
509    The only visible change is the addition of some README files.
510    
511    ----------------------------------------------------------------------
512    Name: Matthias Blume
513    Date: 2001/01/12 23:30:00 JST
514    Tag: blume-20010112-bootfiles
515    Description:
516    
517    Made a new set of bootfiles that goes with the current state of the
518    repository.
519    
520    ----------------------------------------------------------------------
521    Name: Matthias Blume
522    Date: 2001/01/12 21:20:00 JST
523    Tag: blume-20010112-sync
524    Description:
525    
526    I am just flushing out some minor changes that had accumulated in
527    my private branch in order to sync with the main tree.  (This is
528    mainly because I had CVS trouble when trying to merge _into_ my
529    private branch.)
530    
531    Most people should be completely unaffected by this.
532    
533    ----------------------------------------------------------------------
534    Name: Allen Leung
535    Date: Thu Jan 11 21:03:00 EST 2001
536    Tag: leunga-20010111-labexp=mltree
537    Description:
538    
539    1.  Removed the type LabelExp and replace it by MLTree.
540    2.  Rewritten mltree-simplify with the pattern matcher tool.
541    3.  There were some bugs in alpha code generator which would break
542        64-bit code generation.
543    4.  Redo the tools to generate code with the
544    5.  The CM files in MLRISC (and in src/system/smlnj/MLRISC)
545        are now generated by perl scripts.
546    
547    ----------------------------------------------------------------------
548    Name: Matthias Blume
549    Date: 2001/01/10 21:55:00 JST
550    Tag: blume-20010110-rcc
551    Description:
552    
553    The RCC stuff now seems to work (but only on the x86).
554    This required hacking of the c-calls interface (and -implementation) in
555    MLRISC.
556    
557    Normal compiler users should be unaffected.
558    
559    ----------------------------------------------------------------------
560    Name: Matthias Blume
561    Date: 2001/01/09 01:20:00 JST
562    Tag: blume-20010109-rcc
563    Description:
564    
565    This is a fairly big patch, flushing out a large number of pending
566    changes that I made to my development copy over the last couple of days.
567    
568    Of practical relevance at this moment is a workaround for a pickling
569    bug that Allen ran into the other day.  The cause of the bug itself is
570    still unknown and it might be hard to fix it properly, but the
571    workaround has some merits of its own (namely somewhat reducing pickling
572    overhead for certain libraries).  Therefore, I think this solution should
573    be satisfactory at this time.
574    
575    The rest of the changes (i.e., the vast majority) has to do with my
576    ongoing efforts of providing direct support for C function calls from
577    ML.  At the moment there is a new primop "RAW_CCALL", typing magic
578    in types/cproto.sml (invoked from FLINT/trans/translate.sml), a new
579    case in the FLINT CPS datatype (RCC), changes to cps/convert.sml to
580    translate uses of RAW_CCALL into RCC, and changes to mlriscGen.sml to
581    handle RCC.
582    
583    The last part (the changes to mlriscGen.sml) are still known to be
584    wrong on the x86 and not implemented on all other architectures.  But
585    the infrastructure is in place. I had to change a few functor
586    signatures in the backend to be able to route the CCalls interface
587    from MLRISC there, and I had to specialize the mltree type (on the
588    x86) to include the necessary extensions. (The extensions themselves
589    were already there and redy to go in MLRISC/x86).
590    
591    Everything should be very happy as soon as someone helps me with
592    mlriscGen.sml...
593    
594    In any case, nothing of this should matter to anyone as long as the
595    new primop is not being used (which is going to be the case unless you
596    find it where I hid it :). The rest of the compiler is completely
597    unaffected.
598    
599    ----------------------------------------------------------------------
600    Name: Matthias Blume
601    Date: 2001/01/05 00:30:00 JST
602    Tag: blume-20010105-primops
603    Description:
604    
605    Added some experimental support for work that I am doing right now.
606    These changes mostly concern added primops, but there is also a new
607    experimental C library in the runtime system (but currently not enabled
608    anywhere except on Linux/X86).
609    
610    In the course of adding primops (and playing with them), I discovered that
611    Zhong's INL_PRIM hack (no type info for certain primops) was, in fact, badly
612    broken.  (Zhong was very right he labeled this stuff as "major gross hack".)
613    To recover, I made type information in INL_PRIM mandatory and changed
614    prim.sml as well as built-in.sml accordingly.  The InLine structure now
615    has complete, correct type information (i.e., no bottom types).
616    
617    Since all these changes mean that we need new binfiles, I also bumped the
618    version number to 110.32.1.
619    
620    ----------------------------------------------------------------------
621    Name: Matthias Blume
622    Date: 2000/12/30 22:10:00 JST
623    Tag: blume-20001230-various
624    Description:
625    
626    Added proxy libraries for MLRISC and let MLRISC libraries refer
627    to each other using path anchors.  (See CM manual for explanation.)
628    
629    Updated CM documentation.
630    
631    Fixed some bugs in CM.
632    
633    Implemented "proxy" libraries (= syntactic sugar for CM).
634    
635    Added "-quiet" option to makeml and changed runtime system accordingly.
636    
637    Added cleanup handler for exportML to reset timers and compiler stats.
638    
639    ----------------------------------------------------------------------
640    Name: Lal George
641    Date: 2000/12/22 22:22:58 EST 2000
642    Tag: Release_110_32
643    Description:
644    
645            Infinite precision used throughout MLRISC.
646            see MLRISC/mltree/machine-int.sig
647    
648    ----------------------------------------------------------------------
649    Name: Matthias Blume
650    Date: 2000/12/22 23:16:00 JST
651    Tag: blume-20001222-warn
652    Description:
653    
654    Corrected wording and formatting of some CM warning message which I
655    broke in my previous patch.
656    
657    ----------------------------------------------------------------------
658    Name: Matthias Blume
659    Date: 2000/12/22 21:20:00 JST
660    Tag: blume-20001222-anchorenv
661    Description:
662    
663    Fixed CM's handling of anchor environments in connection with CMB.make.
664    
665    ----------------------------------------------------------------------
666    Name: Matthias Blume
667    Date: 2000/12/22 13:15:00 JST
668    Tag: blume-20001222-cleanup
669    Description:
670    
671    Removed src/cm/ffi which does not (and did not) belong here.
672    
673    ----------------------------------------------------------------------
674    Name: Matthias Blume
675    Date: 2000/12/21 23:55:00 JST
676    Tag: blume-20001221-exn
677    Description:
678    
679    Probably most important: CM no longer silently swallows all exceptions
680    in the compiler.
681    Plus: some other minor CM changes.  For example, CM now reports some
682    sizes for generated binfiles (code, data, envpickle, lambdapickle).
683    
684    ----------------------------------------------------------------------
685    Name: Matthias Blume
686    Date: 2000/12/15 00:01:05 JST
687    Tag: blume-20001215-dirtool
688    Description:
689    
690    - "dir" tool added.
691    - improvements and cleanup to Tools structure
692    - documentation updates
693    
694    ----------------------------------------------------------------------
695    Name: Allen Leung
696    Date: Thu Dec 14 03:45:24 EST 2000
697    Description:
698    Tag:  leunga-20001214-int-inf
699    Description:
700    
701       In IntInf, added these standard functions, which are missing from our
702    implementation:
703    
704        andb : int * int -> int
705        xorb : int * int -> int
706        orb  : int * int -> int
707        notb : int -> int
708         <<   : int * word -> int
709        ~>>  : int * word -> int
710    
711       Not tested, I hope they are correct.
712    
713    ----------------------------------------------------------------------
714    Name: Allen Leung
715    Date: Fri Dec  8 19:23:26 EST 2000
716    Description:
717    Tag:  leunga-20001208-nowhere
718    Description:
719    
720      Slight improvements to the 'nowhere' tool to handle OR-patterns,
721    to generate better error messages etc.  Plus a brief manual.
722    
723    ----------------------------------------------------------------------
724    Name: Lal George
725    Date: 2000/12/08 09:54:02 EST 2000
726    Tag: Release_110_31
727    Description:
728    
729    - Version 110.31
730    ----------------------------------------------------------------------
731    Name: Allen Leung
732    Date: Thu Dec  7 22:01:04 EST 2000
733    Tag:  leunga-20001207-cell-monster-hack
734    Description:
735    
736    Major MLRISC internal changes.  Affect all clients.
737    Summary:
738    
739    1.  Type CELLS.cell = int is now replaced by a datatype.
740        As a result, the old regmap is now gone.  Almost all interfaces
741        in MLRISC change as a consequence.
742    
743    2.  A new brand version of machine description tool (v3.0) that generates
744        modules expecting the new interface.  The old version is removed.
745    
746    3.  The RA interface has been further abstracted into two new functors.
747        RISC_RA and X86RA.  These functors have much simpler interfaces.
748        [See also directory MLRISC/demo.]
749    
750    4.  Some other new source->source code generation tools are available:
751    
752        a. MLRISC/Tools/RewriteGen -- generate rewriters from rules.
753        b. MLRISC/Tools/WhereGen -- expands conditional pattern matching rules.
754           I use this tool to generate the peephole optimizers---with the new
755           cell type changes, peephole rules are becoming difficult to write
756           without conditional pattern matching.
757    
758    5.  More Intmap -> IntHashTable change.  Previous changes by Matthias didn't
759        cover the entire MLRISC source tree so many things broke.
760    
761    6.  CM files have been moved to the subdirectory MLRISC/cm.
762        They are moved because there are a lot of them and they clutter up the
763        root dir.
764    
765    7.  More detailed documentation to come...
766    
767        NOTE: To rebuild from 110.30 (ftp distribution), you'll have to do
768        a makeml -rebuild first.  This is because of other other
769        changes that Matthias has made (see below).
770    
771    
772    ----------------------------------------------------------------------
773    Name: Matthias Blume
774    Date: 2000/11/30 23:12:00 JST
775    Tag: blume-20001130-filereorg
776    Description:
777    
778    Some manual updates and some file reorganizations in CM.
779    
780    ----------------------------------------------------------------------
781    Name: Matthias Blume
782    Date: 2000/11/24 17:45:00 JST
783    Tag: blume-20001124-link
784    Description:
785    
786    Drastically improved link traversal code for the case that the dynamic
787    value was already loaded at bootstrap time.  As a result, CM and CMB
788    now both load blazingly fast -- even on a very slow machine.  Also,
789    memory consumption has been further reduced by this.
790    
791    Warning: The format of the PIDMAP file has changed.  THerefore, to
792    bootstrap you have to do this:
793    
794    1. Run CMB.make
795    2. Make a symbolic link for the boot directory:
796         ln -s sml.boot.ARCH-OS xxx
797    3. "Rebuild" the boot directory:
798         ./makeml -boot xxx -rebuild sml ; rm xxx
799    4. Boot normally:
800          ./makeml
801    
802    ----------------------------------------------------------------------
803    Name: Matthias Blume
804    Date: 2000/11/21 21:20:00 JST
805    Tag: blume-20001121-tools
806    Description:
807    
808    Continued hacking on autoloading problem -- with success this time.
809    Also changed tool-plugin mechanism.  See new CM manual.
810    
811    ----------------------------------------------------------------------
812    Name: Matthias Blume
813    Date: 2000/11/19 14:30:00 JST
814    Tag:  blume-20001119-autoload
815    Description:
816    
817    Some hacking to make autoloading faster.  Success for CMB, no success
818    so far for CM.  There is a reduced structure CM' that autoloads faster.
819    (This is a temporary, non-documented hack to be eliminated again when
820    the general problem is solved.)
821    
822    ----------------------------------------------------------------------
823    Name: Matthias Blume
824    Date: 2000/11/17 14:10:00 JST
825    Tag: blume-20001117-pickle-lib
826    Description:
827    
828    1. Eliminated comp-lib.cm
829    2. Made pickle-lib.cm
830    3. Eliminated all uses of intset.sml (from comp-lib.cm)
831    4. Replaced all uses of intmap.{sig,sml} (from comp-lib.cm) with
832       equivalent constructs from smlnj-lib.cm (INtHashTable).
833    5. Point 4. also goes for those uses of intmap.* in MLRISC.
834       Duplicated intmap modules thrown out.
835    6. Hunted down all duplicated SCC code and replaced it with
836       equivalent stuff (GraphSCCFn from smlnj-lib.cm).
837    7. Rewrote Feedback module.
838    8. Moved sortedlist.sml into viscomp-lib.cm.  Eventually it
839       should be thrown out and equivalent modules from smlnj-lib.cm
840       should be used (IntRedBlackSet, IntListSet, ...).
841    
842    Confirmed that compiler compiles to fixpoint.
843    
844    ----------------------------------------------------------------------
845    Name: Allen Leung
846    Date: 2000/11/10 18:00:00
847    Tag: leunga-20001110-new-x86-fp
848    
849    A new x86 floating point code generator has been added.
850    By default this is turned off.  To turn this on, do:
851    
852        CM.autoload "$smlnj/compiler.cm";
853        Compiler.Control.MLRISC.getFlag "x86-fast-fp" := true;
854    
855    Changes:
856    
857    1.  Changed FTAN to FPTAN so that the assembly output is correct.
858    2.  Changed the extension callback for FTANGENT to generate:
859    
860              fptan
861              fstp  %st(0)
862        instead of
863              fptan
864              fstpl ftempmem
865    
866    3.  Numerous assembly fixes for x86.
867    
868    5.  Cleaned up the machine code output module x86/x86MC.sml and added
869        support for a whole bunch of instructions and addressing modes:
870    
871          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st, %st(n)
872          faddp/fsubp/fsubrp/fmulp/fdivp/fdivrp  %st, %st(n)
873          fadd/fsub/fsubr/fmul/fdiv/fdivr  %st(n), %st
874          fiadd/fisub/fisubr/fimul/fidiv/fidivr mem
875          fxch %st(n)
876          fld %st(n)
877          fst %st(n)
878          fst mem
879          fstp %st(n)
880          fucom %st(n)
881          fucomp %st(n)
882    
883        All these are now generated when the fast fp mode is turned on.
884    
885    6.  Removed the dedicated registers %st(0), ..., %st(7) from X86CpsRegs
886    
887    ----------------------------------------------------------------------
888    Name: Matthias Blume
889    Date: 2000/11/09 11:20:00 JST
890    Tag: blume-20001109-scc
891    Description:
892    
893    Eliminated some code duplication:
894    
895    1. Added "where" clause to GraphSCCFn in SML/NJ Library.
896       (Otherwise the functor is useless.)
897    2. Used GraphSCCFn where SCCUtilFun was used previously.
898    3. Got rid of SCCUtilFun (in comp-lib.cm).
899    
900    ----------------------------------------------------------------------
901    Name: Lal George
902    Date: 2000/11/06 09:02:21 EST 2000
903    Tag: Release_110_30
904    Description:
905    
906    - Version 110.30
907    ----------------------------------------------------------------------
908    Name: Matthias Blume
909    Date: 2000/11/04 14:45:00
910    Tag: blume-20001104-mlbuild
911    Description:
912    
913    - Made ml-build faster on startup.
914    - Documentation fixes.
915    
916    ----------------------------------------------------------------------
917    Name: Matthias Blume
918    Date: 2000/11/02 17:00:00 JST
919    Tag: blume-20001102-condcomp
920    Description:
921    
922    - Small tweaks to pickler -- new BOOTFILES!
923    - Version bumped to 110.29.2.
924    - Added conditional compilation facility to init.cmi (see comment there).
925    ----------------------------------------------------------------------
926    Name: Allen Leung
927    Date: 2000/10/23 19:31:00
928    Tag: leunga-20001023-demo-ra
929    
930    1. Minor RA changes that improves spilling on x86 (affects Moby and C-- only)
931    2. Test programs for the graph library updated
932    3. Some new MLRISC demo programs added
933    
934    ----------------------------------------------------------------------
935    Name: Matthias Blume
936    Date: 2000/08/31 22:15:00 JST
937    Tag: blume-20001017-errmsg
938    Description:
939    
940    More error message grief: Where there used to be no messages, there
941    now were some that had bogus error regions.  Fixed.
942    
943    ----------------------------------------------------------------------
944    Name: Matthias Blume
945    Date: 2000/08/31 17:30:00 JST
946    Tag: blume-20001017-v110p29p1
947    Description:
948    
949    I made a version 110.29.1 with new bootfiles.
950    
951    Changes:  Modified pickler/unpickler for faster and leaner unpickling.
952              CM documentation changes and a small bugfix in CM's error reporting.
953    
954    ----------------------------------------------------------------------
955    Name: Lal George
956    Date: 2000/09/27 14:42:35 EDT
957    Tag: george-20000927-nodestatus
958    Description:
959    
960    Changed the type of the nodestatus, so that:
961    
962            SPILLED(~1)             is now SPILLED
963            SPILLED(m) where m>=0   is now MEMREG(m)
964            SPILLED(s) where s<~1   is now SPILL_LOC(~s)
965    
966    ----------------------------------------------------------------------
967    Name: Matthias Blume
968    Date: 2000/09/07 14:45:00 JST
969    Tag: blume-20000907-cmerrmsg
970    Description:
971    
972    Small tweak to CM to avoid getting ML syntax error messages twice.
973    
974    ----------------------------------------------------------------------
975    Name: Matthias Blume
976    Date: 2000/08/31 18:00:00 JST
977    Tag: blume-20000831-cvsbootfiles
978    Description:
979    
980    New URL for boot files (because the 110.29 files on the BL server do
981    now work correctly with my updated install scripts for yacc and lex).
982    
983    ----------------------------------------------------------------------
984    Name: Matthias Blume
985    Date: 2000/08/08 12:33:00 JST
986    Tag: blume-20000808-manual
987    Description:
988    
989    Tiny update to CM manual.
990    
991    ----------------------------------------------------------------------
992    Name: Allen Leung
993    Date: 2000/08/7 19:31:00
994    Tag: leunga-20000807-a-whole-bunch-of-stuff
995    
996      Moby, C--, SSA, x86, machine descriptions etc.  Should only affect C--
997    and Mobdy.
998    
999    1.  x86
1000    
1001       a.  Fixes to peephole module by John and Dan.
1002       b.  Assembly fix to SETcc by Allen.
1003       c.  Fix to c-call by John.
1004       d.  Fix to spilling by John.  (This one deals with the missing FSTPT case)
1005       e.  Instruction selection optimization to SETcc as suggested by John.
1006    
1007           For example,
1008    
1009            MV(32, x, COND(32, CMP(32, LT, a, b), LI 1, LI 0))
1010    
1011           should generate:
1012    
1013            MOVL a, x
1014            SUBL b, x
1015            SHRL 31, x
1016    
1017    2.  IR stuff
1018    
1019         A bunch of new DJ-graph related algorithms added.  These
1020         speed up SSA construction.
1021    
1022    3.  SSA + Scheduling
1023    
1024         Added code for SSA and scheduling to the repository
1025    
1026    ----------------------------------------------------------------------
1027    Name: Lal George
1028    Date: 2000/07/27 11:53:14 EDT
1029    
1030    Tag: lal-20000727-linux-ppc
1031    Description:
1032    
1033     Made changes to support Linux PPC.
1034     p.s. I have confirmation that the 110.29 boot files work fine.
1035    
1036    ----------------------------------------------------------------------
1037    Name: Matthias Blume
1038    Date: 2000/07/27 17:40:00 JST
1039    Tag: blume-20000727-scripts
1040    Description:
1041    
1042    !!!! WARNING !!!!
1043    You must recompile the runtime system!
1044    !!!! WARNING !!!!
1045    
1046    This is basically another round of script-enhancements:
1047    
1048    1. sml, ml-build, and ml-makedepend accept options -D and -U to define
1049       and undefine CM preprocessor symbols.
1050    
1051    2. ml-build avoids generating a new heap image if it finds that the
1052       existing one is still ok.  (The condition is that no ML file had to
1053       be recompiled and all ML files are found to be older that the heap
1054       file.)
1055    
1056       To make this work smoothly, I also hacked the runtime system as
1057       well as SMLofNJ.SysInfo to get access to the heap image suffix
1058       (.sparc-solaris, ...) that is currently being used.
1059    
1060       Moreover, the signature of CM.mk_standalone has changed.  See the
1061       CM manual.
1062    
1063    3. ml-makedepend accepts additional options -n, -a, and -o.  (See the
1064       CM manual for details.)
1065    
1066    4. More CM manual updates:
1067        - all of the above has been documented.
1068        - there is now a section describing the (CM-related) command line
1069          arguments that are accepted by the "sml" command
1070    
1071    ----------------------------------------------------------------------
1072    Name: Matthias Blume
1073    Date: 2000/07/25 16:20:00 JST
1074    Tag: blume-20000725-makedepend
1075    Description:
1076    
1077    Added a script called ml-makedepend.  This can be used in makefiles
1078    for Unix' make in a way very similar to the "makedepend" command for
1079    C.
1080    
1081    The script internally uses function CM.sources.
1082    
1083    Synopsis:
1084    
1085        ml-makedepend [-f makefile] cmfile targetname
1086    
1087    The default for the makefile is "makefile" (or "Makefile" should
1088    "makefile" not exist).
1089    
1090    ml-makedepend adds a cmfile/targetname-specific section to this
1091    makefile (after removing the previous version of this section).  The
1092    section contains a single dependency specification with targetname on
1093    the LHS (targetname is an arbitrary name), and a list of files derived
1094    from the cmfile on the RHS.  Some of the files on the RHS are
1095    ARCH/OPSYS-specific.  Therefore, ml-makedepend inserts references to
1096    "make" variables $(ARCH) and $(OPSYS) in place of the corresponding
1097    path names.  The makefile writer is responsible for making sure that
1098    these variables have correct at the time "make" is invoked.
1099    
1100    ----------------------------------------------------------------------
1101    Name: Matthias Blume
1102    Date: 2000/07/22 23:30:00 JST
1103    Tag: blume-20000722-urlupdate
1104    Description:
1105    
1106    Changed BOOT and config/srcarchiveurl to point to BL server:
1107    
1108        ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.29/
1109    
1110    ----------------------------------------------------------------------
1111    Name: Matthias Blume
1112    Date: 2000/07/18 18:00:00 JST
1113    Tag: blume-20000718-Version_110_29
1114    Description:
1115    
1116    1. Updated src/compiler/TopLevel/main/version.sml to version 110.29
1117    
1118    2. Updated config/version to 110.29
1119    
1120    3. Updated config/srcarchiveurl
1121    
1122    3. New boot files!
1123       ftp://ftp.cs.princeton.edu/pub/people/blume/sml/110.29-autofetch
1124    
1125    ----------------------------------------------------------------------
1126    Name: Matthias Blume
1127    Date: 2000/07/11 13:58:00 JST
1128    Tag: blume-20000711-doctypo
1129    Description:
1130    
1131    Fixed a few typos in CM manual.
1132    
1133    ----------------------------------------------------------------------
1134    Name: Allen Leung
1135    Date: 2000/06/15 00:38:00
1136    Tag: leunga-20000704-sparc-x86
1137    
1138    1. x86 peephole improvement sp += k; sp -= k => nop  [from John]
1139    2. fix to x86 RET bug [found by Dan Grossman]
1140    3. sparc assembly bug fix for ticc instructions [found by Fermin]
1141    
1142       Affects c-- and moby only
1143    
1144    ----------------------------------------------------------------------
1145    Name: Matthias Blume
1146    Date: 2000/07/04 15:26:00
1147    Tag: blume-20000704-trigger
1148    Description:
1149    
1150    1. Improvements to CM manual.
1151    2. SMLofNJ.Internals.BTrace.trigger reinstated as an alternative way
1152       of getting a back-trace.  The function, when called, raises an
1153       internal exception which explicitly carries the full back-trace history,
1154       so it is unaffected by any intervening handle-raise pairs ("trivial"
1155       or not).  The interactive loop will print that history once it arrives
1156       at top level.
1157       Short of having all exceptions implicitly carry the full history, the
1158       recommended way of using this facility is:
1159         - compile your program with instrumentation "on"
1160         - run it, when it raises an exception, look at the history
1161         - if the history is "cut off" because of some handler, go and modify
1162           your program so that it explicitly calls BTrace.trigger
1163         - recompile (still instrumented), and rerun; look at the full history
1164    
1165    ----------------------------------------------------------------------
1166    Name: Matthias Blume
1167    Date: 2000/07/03 15:36:00 JST
1168    Tag: blume-20000702-manual
1169    Description:
1170    
1171    Small corrections and updates to CM manual.
1172    
1173    ----------------------------------------------------------------------
1174    Name: Matthias Blume
1175    Date: 2000/06/29 16:04:00 JST
1176    Tag: blume-20000629-yacctool
1177    Description:
1178    
1179    Changes:
1180    
1181    1. Class "mlyacc" now takes separate arguments to pass options to
1182       generated .sml- and .sig-files independently.
1183    2. Corresponding CM manual updates.
1184    3. BTrace module now also reports call sites.  (However, for loop clusters
1185       it only shows from where the cluster was entered.)  There are associated
1186       modifications to core.sml, internals.{sig,sml}, btrace.sml, and btimp.sml.
1187    
1188    ----------------------------------------------------------------------
1189    Name: Matthias Blume
1190    Date: 2000/06/27 16:51:00 JST
1191    Tag: blume-20000627-noweb
1192    Description:
1193    
1194    Changes:
1195    
1196     1. Implemented "subdir" and "witness" options for noweb tool.
1197        This caused some slight internal changes in CM's tool implementation.
1198     2. Fixed bug in "tool plugin" mechanism.  This is essentially cleaning
1199        some remaining issues from earlier path anchor changes.
1200     3. Updated CM manual accordingly.
1201    
1202     4. Changed implementation of back-tracing so that I now consider it
1203        ready for prime-time.
1204    
1205        In particular, you don't have to explicitly trigger the back-trace
1206        anymore.  Instead, if you are running BTrace-instrumented code and
1207        there is an uncaught exception (regardless of whether or not it was
1208        raised in instrumented code), the top-level evalloop will print
1209        the back-trace.
1210    
1211        Features:
1212    
1213          - Instrumented and uninstrumented code work together seemlessly.
1214            (Of course, uninstrumented code is never mentioned in actual
1215             back-traces.)
1216    
1217          - Asymptotic time- and space-complexity of instrumented code is
1218            equal to that of uninstrumented code.  (This means that
1219            tail-recursion is preserved by the instrumentation phase.)
1220    
1221          - Modules whose code has been instrumented in different sessions
1222            work together without problem.
1223    
1224          - There is no penalty whatsoever on uninstrumented code.
1225    
1226          - There is no penalty on "raise" expressions, even in
1227            instrumented code.
1228    
1229        A potential bug (or perhaps it is a feature, too):
1230    
1231          A back-trace reaches no further than the outermost instrumented
1232          non-trivial "raise".  Here, a "trivial" raise is one that is the
1233          sole RHS of a "handle" rule.  Thus, back-traces reach trough
1234    
1235               <exp> handle e => raise e
1236    
1237          and even
1238    
1239               <exp> handle Foo => raise Bar
1240    
1241          and, of course, through
1242    
1243               <exp> handle Foo => ...
1244    
1245         if the exception was not Foo.
1246    
1247         Back-traces always reach right through any un-instrumented code
1248         including any of its "handle" expressions, trivial or not.
1249    
1250       To try this out, do the following:
1251    
1252         - Erase all existing binfiles for your program.
1253           (You may keep binfiles for those modules where you think you
1254            definitely don't need back-tracing.)
1255         - Turn on back-trace instrumentation:
1256              SMLofNJ.Internals.BTrace.mode (SOME true);
1257         - Recompile your program.  (I.e., run "CM.make" or "use".)
1258         - You may now turn instrumentation off again (if you want):
1259              SMLofNJ.Internals.BTrace.mode (SOME false);
1260         - Run your program as usual.  If it raises an exception that
1261           reaches the interactive toplevel, then a back-trace will
1262           automatically be printed.  After that, the toplevel loop
1263           will print the exception history as usual.
1264    
1265    ----------------------------------------------------------------------
1266    Name: Matthias Blume
1267    Date: 2000/06/26 09:56:46 JST
1268    Tag: blume-20000626-setup
1269    Description:
1270    
1271    CM: - setup-parameter to "sml" added; this can be used to run arbitrary
1272          ML code before and after compiling a file (e.g., to set compiler
1273          flags)
1274    
1275    Compiler: - improved btrace API (in core.sml, internals.{sig,sml})
1276              - associated changes to btrace.sml (BTrace instrumentation pass)
1277              - cleaner implementation of btimp.sml (BTrace tracing and report
1278                module)
1279    
1280    CM manual: * new path encoding documented
1281               * description of setup-parameter to "sml" added
1282    
1283    The biggest user-visible change to back-tracing is that it is no
1284    longer necessary to compile all traced modules within the same
1285    session.  (This was a real limitation.)
1286    
1287    ----------------------------------------------------------------------
1288    Name: Matthias Blume
1289    Date: 2000/06/24 12:40:00 JST
1290    Tag: blume-20000624-startup
1291    Description:
1292    
1293    Fixes startup slowdown problem.  (I was calling SrcPath.sync a _tad_
1294    bit too often -- to put it mildly. :)
1295    
1296    ----------------------------------------------------------------------
1297    Name: Matthias Blume
1298    Date: 2000/06/23 18:20:00 JST
1299    Tag: blume-20000623-btrace
1300    Description:
1301    
1302    This updates adds a backtrace facility to aid programmers in debugging
1303    their programs.  This involves the following changes:
1304    
1305    1. Module system/smlnj/init/core.sml (structure _Core) now has hooks for
1306       keeping track of the current call stack.  When programs are compiled
1307       in a special mode, the compiler will insert calls to these hooks
1308       into the user program.
1309       "Hook" means that it is possible for different implementations of
1310       back-tracing to register themselves (at different times).
1311    
1312    2. compiler/MiscUtil/profile/btrace.sml implements the annotation phase
1313       as an Absyn.dec->Absyn.dec rewrite.  Normally this phase is turned off.
1314       It can be turned on using this call:
1315         SMLofNJ.Internals.BTrace.mode (SOME true);
1316       Turning it off again:
1317         SMLofNJ.Internals.BTrace.mode (SOME false);
1318       Querying the current status:
1319         SMLofNJ.Internals.BTrace.mode NONE;
1320       Annotated programs are about twice as big as normal ones, and they
1321       run a factor of 2 to 4 slower with a dummy back-trace plugin (one
1322       where all hooks do nothing).  The slowdown with a plugin that is
1323       actually useful (such as the one supplied by default) is even greater,
1324       but in the case of the default plugin it is still only an constant
1325       factor (amortized).
1326    
1327    3. system/Basis/Implementation/NJ/internals.{sig,sml} have been augmented
1328       with a sub-structure BTrace for controlling back-tracing.  In particular,
1329       the above-mentioned function "mode" controls whether the annotation
1330       phase is invoked by the compiler.  Another important function is
1331       "trigger": when called it aborts the current execution and causes
1332       the top-level loop to print a full back-trace.
1333    
1334    4. compiler/MiscUtil/profile/btimp.sml is the current default plugin
1335       for back-tracing.  It keeps track of the dynamic call stack and in
1336       addition to that it keeps a partial history at each "level" of that
1337       stack.  For example, if a tail-calls b, b tail-calls c, and c tail-calls
1338       d and b (at separate times, dynamically), then the report will show:
1339    
1340       GOTO   d
1341             /c
1342       GOTO  \b
1343       CALL   a
1344    
1345       This shows that there was an initial non-tail call of a, then a
1346       tail-call to b or c, looping behavior in a cluster of functions that
1347       consist of b and c, and then a goto from that cluster (i.e., either from
1348       b or from c) to d.
1349    
1350       Note that (depending on the user program) the amount of information
1351       that the back-trace module has to keep track of at each level is bounded
1352       by a constant.  Thus, the whole implementation has the same asymptotical
1353       complexity as the original program (both in space and in time).
1354    
1355    5. compiler/TopLevel/interact/evalloop.sml has been modified to
1356       handle the special exception SMLofNJ.Internals.BTrace.BTrace
1357       which is raised by the "trigger" function mentioned above.
1358    
1359    Notes on usage:
1360    
1361    - Annotated code works well together with unannotated code:
1362    Unannotated calls simply do not show up at all in the backtrace.
1363    
1364    - It is not a good idea to let modules that were annotated during
1365    different sessions run at the same time.  This is because the compiler
1366    chooses small integers to identify individual functions, and there
1367    will be clashes if different modules were compiled in separate sessions.
1368    (Nothing will crash, and you will even be told about the clashes, but
1369    back-trace information will in general not be useful.)
1370    
1371    - Back-tracing can be confused by callcc and capture.
1372    
1373    - The only way of getting a back-trace right now is to explicitly
1374    invoke the "trigger" function from your user program.  Eventually, we
1375    should make every exception carry back-trace information (if
1376    available).  But since this creates more overhead at "raise"-time
1377    (similar to the current exnHistory overhead), I have not yet
1378    implemented this.  (The implementation will be rather easy.)  With
1379    exceptions carrying back-trace information, this facility will be even
1380    more useful because users don't need to modify their programs...
1381    
1382    - While it is possible to compile the compiler with back-trace
1383    annotations turned on (I did it to get some confidence in
1384    correctness), you must make absolutely sure that core.sml and
1385    btimp.sml are compiled WITHOUT annotation!  (core.sml cannot actually
1386    be compiled with annotation because there is no core access yet, but
1387    if you compile btimp.sml with annotation, then the system will go into
1388    an infinite recursion and crash.)
1389    Since CM currently does not know about BTrace, the only way to turn
1390    annotations on and off for different modules of the compiler is to
1391    interrupt CMB.make, change the settings, and re-invoke it.  Of course,
1392    this is awkward and clumsy.
1393    
1394    Sample sessions:
1395    
1396    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
1397    - SMLofNJ.Internals.BTrace.mode (SOME true);
1398    [autoloading]
1399    [autoloading done]
1400    val it = false : bool
1401    - structure X = struct
1402    -     fun main n = let
1403    -         fun a (x, 0) = d x
1404    -           | a (x, n) = b (x, n - 1)
1405    -         and b (x, n) = c (x, n)
1406    -         and c (x, n) = a (x, n)
1407    -         and d x = e (x, 3)
1408    -         and e (x, 0) = f x
1409    -           | e (x, n) = e (x, n - 1)
1410    -         and f 0 = SMLofNJ.Internals.BTrace.trigger ()
1411    -           | f n = n * g (n - 1)
1412    -         and g n = a (n, 3)
1413    -     in
1414    -         f n
1415    -     end
1416    - end;
1417    structure X : sig val main : int -> int end
1418    - X.main 3;
1419    *** BACK-TRACE ***
1420    GOTO   stdIn:4.2-13.20: X.main[2].f
1421    GOTO-( stdIn:4.2-13.20: X.main[2].e
1422    GOTO   stdIn:4.2-13.20: X.main[2].d
1423         / stdIn:4.2-13.20: X.main[2].a
1424         | stdIn:4.2-13.20: X.main[2].b
1425    GOTO-\ stdIn:4.2-13.20: X.main[2].c
1426    CALL   stdIn:4.2-13.20: X.main[2].g
1427    GOTO   stdIn:4.2-13.20: X.main[2].f
1428    GOTO-( stdIn:4.2-13.20: X.main[2].e
1429    GOTO   stdIn:4.2-13.20: X.main[2].d
1430         / stdIn:4.2-13.20: X.main[2].a
1431         | stdIn:4.2-13.20: X.main[2].b
1432    GOTO-\ stdIn:4.2-13.20: X.main[2].c
1433    CALL   stdIn:4.2-13.20: X.main[2].g
1434    GOTO   stdIn:4.2-13.20: X.main[2].f
1435    GOTO-( stdIn:4.2-13.20: X.main[2].e
1436    GOTO   stdIn:4.2-13.20: X.main[2].d
1437         / stdIn:4.2-13.20: X.main[2].a
1438         | stdIn:4.2-13.20: X.main[2].b
1439    GOTO-\ stdIn:4.2-13.20: X.main[2].c
1440    CALL   stdIn:4.2-13.20: X.main[2].g
1441    GOTO   stdIn:4.2-13.20: X.main[2].f
1442    CALL   stdIn:2.15-17.4: X.main[2]
1443    -
1444    
1445    (Note that because of a FLINt bug the above code currently does not
1446    compile without BTrace turned on.)
1447    
1448    Here is another example, using my modified Tiger compiler:
1449    
1450    Standard ML of New Jersey v110.28.1 [FLINT v1.5], June 5, 2000
1451    - SMLofNJ.Internals.BTrace.mode (SOME true);
1452    [autoloading]
1453    [autoloading done]
1454    val it = false : bool
1455    - CM.make "sources.cm";
1456    [autoloading]
1457    ...
1458    [autoloading done]
1459    [scanning sources.cm]
1460    [parsing (sources.cm):parse.sml]
1461    [creating directory CM/SKEL ...]
1462    [parsing (sources.cm):tiger.lex.sml]
1463    ...
1464    [wrote CM/sparc-unix/semant.sml]
1465    [compiling (sources.cm):main.sml]
1466    [wrote CM/sparc-unix/main.sml]
1467    [New bindings added.]
1468    val it = true : bool
1469    - Main.compile ("../testcases/merge.tig", "foo.out");
1470    *** BACK-TRACE ***
1471    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trvar
1472    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
1473    CALL   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
1474    GOTO   lib/semant.sml:289.3-295.22: SemantFun[2].transExp.trexp.check[2]
1475    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
1476    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
1477    CALL   lib/semant.sml:488.3-505.6: SemantFun[2].transDec.trdec[2].transBody[2]
1478         / lib/semant.sml:411.65-543.8: SemantFun[2].transDec
1479    CALL-\ lib/semant.sml:413.2-540.9: SemantFun[2].transDec.trdec[2]
1480    CALL   lib/semant.sml:99.2-396.21: SemantFun[2].transExp.trexp
1481    CALL   lib/semant.sml:8.52-558.4: SemantFun[2].transProg[2]
1482    CALL   main.sml:1.18-118.4: Main.compile[2]
1483    -
1484    
1485    ----------------------------------------------------------------------
1486    Name: Matthias Blumen
1487    Date: 2000/06/21 18:00:00 JST
1488    Tag: blume-20000621-manual
1489    Description:
1490    
1491    CM manual update: Path environments documented.
1492    
1493    ----------------------------------------------------------------------
1494    Name: Matthias Blume
1495    Date: 2000/06/19 13:40:00
1496    Tag: blume-20000619-manual
1497    Description:
1498    
1499    CM manual and system/README update.  This only covers the fact that
1500    there are no more implicit anchors.  (Path environments and the "bind"
1501    option to "cm" have yet to be documented.)
1502    
1503    ----------------------------------------------------------------------
1504    Name: Matthias Blume
1505    Date: 2000/06/19 11:05:00 JST
1506    Tag: blume-20000619-chdir-bugfix
1507    Description:
1508    
1509    Fixed a bug in new SrcPath module that sometimes led to a bad chDir call.
1510    
1511    ----------------------------------------------------------------------
1512    Name: Matthias Blume
1513    Date: 2000/06/18 22:00:10 JST
1514    Tag: blume-20000618-implicit-anchors-really-gone
1515    Description:
1516    
1517    I updates the previous HISTORY entry where I forgot to mention that
1518    implicit anchors are no longer with us.
1519    
1520    The current update also gets rid of the (now useless) controller
1521    CM.Control.implicit_anchors.
1522    
1523    ----------------------------------------------------------------------
1524    Name: Matthias Blume
1525    Date: 2000/06/16 17:30:00 JST
1526    Tag: blume-20000616-anchorenv
1527    Description:
1528    
1529    This patch implements the long anticipated (just kidding :) "anchor
1530    environment" mechanism.  In the course of doing this, I also
1531    re-implemented CM's internal "SrcPath" module from scratch.  The new
1532    one should be more robust in certain boundary cases.  In any case, it
1533    is a lot cleaner than its predecessor (IMHO).
1534    
1535    This time, although there is yet another boot file format change, I
1536    kept the unpickler backward-compatible.  As a result, no new bootfiles
1537    are necessary and bootstrapping is straightforward.  (You cannot read
1538    new bootfiles into an old system, but the other way around is no
1539    problem.)
1540    
1541    Visible changes:
1542    
1543    ** 0. Implicit path anchors (without the leading $-symbol) are no
1544    longer recognized at all. This means that such path names are not
1545    illegal either.  For example, the name basis.cm simply refers to a
1546    local file called "basis.cm" (i.e, the name is an ordinary path
1547    relative to .cm-files directory).  Or, to put it differently, only
1548    names that start with $ are anchored paths.
1549    
1550    ** 1. The $<singlearc> abbreviation for $/<singlearc> has finally
1551    vanished.
1552    
1553    John (Reppy) had critizised this as soon as I originally proposed and
1554    implemented it, but at that time I did not really deeply believe
1555    him. :) Now I came full-circle because I need the $<singlearc> syntax
1556    in another place where it cannot be seen as an abbreviation for
1557    $/<singlearc>.  To avoid the confusion, $<singlearc> now means what it
1558    seems to mean (i.e., it "expands" into the corresponding anchor
1559    value).
1560    
1561    However, when paths are used as members in CM description files, it
1562    continues to be true that there must be at least another arc after the
1563    anchor.  This is now enforced separately during semantic analysis
1564    (i.e., from a lexical/syntactical point of view, the notation is ok.)
1565    
1566    ** 2. The "cm" class now accepts an option "bind".  The option's value
1567    is a sub-option list of precisely two items -- one labeled "anchor"
1568    and the other one labeled "value".  As you might expect, "anchor" is
1569    used to specify an anchor name to be bound, and "value" specifies what
1570    the anchor is being bound to.
1571    
1572    The value must be a directory name and can be given in either standard
1573    syntax (including the possibility that it is itself an anchored path)
1574    or native syntax.
1575    
1576    Examples:
1577    
1578       foo.cm (bind:(anchor:bar value:$mystuff/bar))
1579       lib.cm (bind:(anchor:a value:"H:\\x\\y\\z"))  (* only works under windows *)
1580    
1581    and so on.
1582    
1583    The meaning of this is that the .cm-file will be processed with an
1584    augmented anchor environment where the given anchor(s) is/are bound to
1585    the given values(s).
1586    
1587    The rationale for having this feature is this: Suppose you are trying
1588    to use two different (already stable) libraries a.cm and b.cm (that
1589    you perhaps didn't write yourself).  Further, suppose each of these
1590    two libraries internally uses its own auxiliary library $aux/lib.cm.
1591    Normally you would now have a problem because the anchor "lib" can not
1592    be bound to more than one value globally.  Therefore, the project that
1593    uses both a.cm and b.cm must locally redirect the anchor to some other
1594    place:
1595    
1596       a.cm (bind:(anchor:lib value:/usr/lib/smlnj/a-stuff))
1597       b.cm (bind:(anchor:lib value:/usr/lib/smlnj/b-stuff))
1598    
1599    This hard-wires $lib/aux.cm to /usr/lib/smlnj/a-stuff/aux.cm or
1600    /usr/lib/smlnj/b-stuff/aux.cm, respectively.
1601    
1602    Hard-wiring path names is a bit inflexible (and CM will verbosely warn
1603    you when you do so at the time of CM.stabilize).  Therefore, you can
1604    also use an anchored path as the value:
1605    
1606      a.cm (bind:(anchor:lib value:$a-lib))
1607      b.cm (bind:(anchor:lib value:$b-lib))
1608    
1609    Now you can globally configure (using the usual CM.Anchor.anchor or
1610    pathconfig machinery) bindings for "a-lib" and "b-lib".  Since "lib"
1611    itself is always locally bound, setting it globally is no longer
1612    meaningful or necessary (but it does not hurt either).  In fact, "lib"
1613    can still be used as a global anchor for separate purposes.  As a
1614    matter of fact, one can locally define "lib" in terms of a global
1615    "lib":
1616    
1617      a.cm (bind:(anchor:lib value:$lib/a))
1618      b.cm (bind:(anchor:lib value:$lib/b))
1619    
1620    ** 3: The encoding of path names has changed.  This affects the way
1621    path names are shown in CM's progress report and also the internal
1622    protocol encoding used for parallel make.
1623    
1624    The encoding now uses one or more ':'-separated segments.  Each
1625    segments corresponds to a file that has been specified relative to the
1626    file given by its preceding segment.  The first segment is either
1627    relative to the CWD, absolute, or anchored.  Each segment itself is
1628    basically a Unix pathname; all segments but the first are relative.
1629    
1630    Example:
1631    
1632       $foo/bar/baz.cm:a/b/c.sml
1633    
1634    This path denotes the file bar/a/b/c.sml relative to the directory
1635    denoted by anchor "foo".  Notice that the encoding also includes
1636    baz.cm which is the .cm-file that listed a/b/c.sml.  As usual, such
1637    paths are resolved relative to the .cm-files directory, so baz.cm must
1638    be ignored to get the "real" pathname.
1639    
1640    To make this fact more obvious, CM puts the names of such "virtual
1641    arcs" into parentheses when they appear in progress reports. (No
1642    parentheses will appear in the internal protocol encoding.)  Thus,
1643    what you really see is:
1644    
1645      $foo/bar/(baz.cm):a/b/c.sml
1646    
1647    I find this notation to be much more informative than before.
1648    
1649    Another new feature of the encoding is that special characters
1650    including parentheses, colons, (back)slashes, and white space are
1651    written as \ddd (where ddd is the decimal encoding of the character).
1652    
1653    *** The CM manual still needs to be updated.
1654    
1655    ----------------------------------------------------------------------
1656    Name: Allen Leung
1657    Date: 2000/06/15 00:38:00
1658    Tag: leunga-20000615-x86-peephole
1659    
1660    x86 Peephole fix by Fermin.  Affects c-- and moby only.
1661    
1662    ----------------------------------------------------------------------
1663    Name: Matthias Blume
1664    Date: 2000/06/12 11:40:00
1665    Tag: blume-20000612-parmakefix
1666    Description:
1667    
1668    More cleanup after changing the file naming scheme: This time I
1669    repaired the parallel make mechanism for CMB.make which I broke earlier.
1670    
1671    ----------------------------------------------------------------------
1672    Name: Allen Leung
1673    Date: 2000/06/09 01:25:00
1674    Tag: leunga-20000609-various
1675    
1676    None of these things should affect normal SML/NJ operations
1677    
1678    1. Peephole improvements provided by Fermin (c--)
1679    2. New annotation DEFUSE for adding extra dependence (moby)
1680    3. New X86 LOCK instructions (moby)
1681    4. New machine description language for reservation tables (scheduling)
1682    5. Fixes to various optimization/analysis modules (branch chaining, dominator
1683       trees etc.)
1684    6. I've changed the CM files so that they can work with versions
1685       110.0.6, 110.25 and 110.28
1686    
1687    ----------------------------------------------------------------------
1688    Name: Matthias Blume
1689    Date: 2000/06/09 12:40:00
1690    Tag: blume-20000609-log
1691    Description:
1692    
1693    - Removed all(?) remaining RCS Log entries from sources.
1694    
1695    - Fixed bug in ml-yacc and ml-lex sources (use explicit anchors for
1696      anchored paths).
1697    
1698    ----------------------------------------------------------------------
1699    Name: Matthias Blume
1700    Date: 2000/06/07 17:00:00 JST
1701    Tag: blume-20000607-no-implicit-anchors
1702    Description:
1703    
1704    1. This update changes the default setting for
1705    CM.Control.implicit_anchors from true to false.  This means that
1706    implicit anchors are no longer permitted by default.  I also tried to
1707    make sure that nothing else still relies on implicit anchors.
1708    (This is the next step on the schedule towards a CM that does not even
1709    have the notion of implicit anchors anymore.)
1710    
1711    2. More CM manual updates.
1712    
1713    3. I managed to track down and fix the pickling bug I mentioned last
1714    time.  Because of the previously existing workaround, this entails no
1715    immediate practical changes.
1716    
1717    ----------------------------------------------------------------------
1718    Name: Matthias Blume
1719    Date: 2000/06/06 11:15:00 JST
1720    Tag: blume-20000606-lazierpickle
1721    Description:
1722    
1723    !!!! NEW BOOT FILES !!!!
1724    
1725    * The main purpose of this update is to make library pickles lazier in
1726    order to reduce the initial space penalty for autoloading a library.
1727    As a result, it is now possible to have $smlnj/compiler.cm
1728    pre-registered.  This should take care of the many complaints or
1729    inquiries about missing structure Compiler.  This required changes to
1730    CM's internal data structures and small tweaks to some algorithms.
1731    
1732    As a neat additional effect, it is no longer necessary (for the sake
1733    of lean heap image files) to distinguish between a "minimal" CM and a
1734    "full" CM.  Now, there is only one CM (i.e., the "full" version:
1735    $smlnj/cm.cm aka $smlnj/cm/full.cm), and it is always available at the
1736    interactive top level. ($smlnj/cm/minimal.cm is gone.)
1737    
1738    To make the life of compiler-hackers easier, "makeml" now also
1739    pre-registers $smlnj/cmb.cm (aka $smlnj/cmb/current.cm).  In other
1740    words, after you bootstrap a new sml for the first time, you will not
1741    have to autoload $smlnj/cmb.cm again afterwards.  (The first time
1742    around you will still have to do it, though.)
1743    
1744    * A second change consists of major updates to the CM manual.  There
1745    are now several appendices with summary information and also a full
1746    specification of the CM description file syntax.
1747    
1748    * In directory src/system I added the script "allcross".  This script
1749    invokes sml and cross-compiles the compiler for all supported
1750    architectures.  (Useful when providing a new set of boot files.)
1751    
1752    * There seems to be a latent bug in my "lazy pickles" mechanism.  I
1753    added a small tweak to pickle-util.sml to work around this problem,
1754    but it is not a proper fix yet.  I will investigate further.  (The
1755    effect of the bug was an inflation of library pickle size.)
1756    
1757    * Version number increased to 110.28.1 (to avoid compatibility problems).
1758    
1759    ----------------------------------------------------------------------
1760    Name: Allen Leung
1761    Date: 2000/05/25 17:28 EDT
1762    Tag: leunga-20000525-ra
1763    Description:
1764    
1765      Fixed a bug in freezing phase of the register allocator.
1766    
1767    ----------------------------------------------------------------------
1768    Name: Allen Leung
1769    Date: 2000/05/15 22:53 EDT
1770    Tag: leunga-20000515-alpha-x86-ra
1771    Description:
1772    
1773      1. Alpha
1774    
1775          Slight cleanup.  Removed the instruction SGNXL
1776    
1777      2. X86
1778    
1779          Added the following instructions to the instruction set:
1780    
1781            ROLx, RORx,
1782            BTx, BTSx, BTLx, BTRx,
1783            XCHGx, and variants with the LOCK prefix
1784    
1785      3. Register Allocation
1786    
1787          The module ra-rewrite-with-renaming has been improved.
1788    
1789      These have no effect on SML/NJ.
1790    
1791    ----------------------------------------------------------------------
1792    Name: Matthias Blume
1793    Date: 2000/05/15 16:20:00 JST
1794    Tag: blume-20000515-lightrebuild
1795    Description:
1796    
1797    1. I added an alternative to "-rebuild" to "makeml".  The difference is
1798       that prior to calling CMB.make' the CM-variable "LIGHT" will be
1799       defined.  In effect, the command will not build any cross-compiler
1800       backends and therefore finish more quickly.
1801    
1802       The "fixpt" script also takes a "-light" switch to be able to use
1803       this new facility while compiling for a fixpoint.
1804    
1805    2. I replaced all mentions of anchored paths in group owner specifications
1806       with simple relative paths (usually starting with "..").
1807       The rationale is that a library's internal workings should not be
1808       compromised by the lack of some anchor.  (An anchor is necessary
1809       for someone who wants to refer to the library by an anchored path,
1810       but it should not be necessary to build the same library in the first
1811       place.)
1812    
1813    3. I changed the way CM's tool mechanism determines the shell command
1814       string used for things like ml-yacc etc. so that it does not break
1815       when CM.Control.implicit_anchors is turned off.
1816    
1817    ----------------------------------------------------------------------
1818    Name: Matthias Blume
1819    Date: 2000/05/12 18:20:00 JST
1820    Tag: blume-20000512-ml-build
1821    Description:
1822    
1823    Fixed a bug in config/_ml-build that prevented ml-yacc and ml-lex from
1824    getting installed properly (by config/install.sh).
1825    
1826    ----------------------------------------------------------------------
1827    Name: Matthias Blume
1828    Date: 2000/05/12 17:30:00 JST
1829    Tag: blume-20000512-anchors
1830    Description:
1831    
1832    !!! NEW BOOT FILES !!!
1833    
1834    This change is in preparation of fading out support for "implicitly
1835    anchored path names".  I went through all sources and used the
1836    explicit (and relatively new) $-notation.  See system/README and the
1837    CM manual for more info on this.
1838    
1839    I also modified the anchoring scheme for some things such as "smlnj",
1840    "MLRISC", "cm", etc. to take advantage of the fact that explicit
1841    anchors are more expressive: anchor name and first arc do not have to
1842    coincide.  This entails the following user-visible change:
1843    
1844    You have to write $smlnj/foo/bar instead of smlnj/foo/bar.  In
1845    particular, when you fire up sml with a command-line argument, say,
1846    e.g.:
1847    
1848       sml '$smlnj/cmb.cm'
1849    
1850    At the ML toplevel prompt:
1851    
1852       CM.autoload "$smlnj/cmb.cm";
1853    
1854    There is also a new controller in CM.Control that can be used to turn
1855    off all remaining support for implicit anchors by saying:
1856    
1857        CM.autoload "$smlnj/
1858        #set CM.Control.implicit_anchors false;
1859    
1860    This causes CM to reject implicitly anchored paths.  This is (for the
1861    time being) less permissive than the "final" version where there will
1862    be no more such implicit anchors and relative paths will be just that:
1863    relative.
1864    
1865    The next step (version after next version?) will be to make the
1866    default for CM.Control.implicit_anchors false.  After the dust has
1867    settled, I can then produce the "final" version of this...
1868    
1869    Note: Since bootstrapping is a bit tricky, I provided new boot files.
1870    
1871    ----------------------------------------------------------------------
1872    Name: Matthias Blume
1873    Date: 2000/05/11 16:30:00 JST
1874    Tag: blume-20000511-sources
1875    Description:
1876    
1877    The main change is that I added function CM.sources as a generalized
1878    version of the earlier CM.makedepend.  This entails the following
1879    additional changes:
1880    
1881      - CM.makedepend has been dropped.
1882    
1883      - CM manual has been updated.
1884    
1885      - TOOLS signature and API have been changed.
1886    
1887    ----------------------------------------------------------------------
1888    Name: Allen Leung
1889    Date: 2000/05/10 21:17 EDT
1890    Tag: leunga-20000510-moby-c--ssa
1891    Description:
1892    
1893      Various bug fixes and new features for C--, Moby and MLRISC optimizations.
1894    None of these affect SML/NJ.
1895    
1896    1. Register Allocation
1897    
1898        a. A new ra spilling module (ra/ra-spill-with-renaming) is implemented.
1899           This module tries to remove local (i.e. basic block level) redundancies
1900           during spilling.
1901    
1902        b. A new framework for performing region based register allocation.
1903           Not yet entirely functional.
1904    
1905    2. X86
1906    
1907       a. DefUse for POP was missing the stack pointer [found by Lal]
1908       b. Reload for CALL was incorrect in X86Spill [found by John]
1909       c. Various fixes in X86Spill so that it can be used correctly for
1910          the new spilling module.
1911    
1912    3. SSA/IR
1913    
1914       a. New module ir/dj-dataflow.sml implements elimination based
1915          data flow analysis.
1916    
1917    4. MLRiscGen
1918    
1919       a. Fix for gc type annotation
1920    
1921    5. MDGen
1922    
1923       Various fixes for machine description -> ml code translation.  For ssa
1924       only.
1925    
1926    ----------------------------------------------------------------------
1927    Name: Allen Leung
1928    Date: 2000/05/08 22:17 EDT
1929    Tag: leunga-20000508-labexp
1930    Description:
1931    
1932      Fermin has found a few assembly problems with constant expressions
1933      generated in LabelExp.  Mostly, the problems involve extra parentheses,
1934      which choke on dumb assemblers.  This is his fix.
1935    
1936    ----------------------------------------------------------------------
1937    Name: Dave MacQueen
1938    Date: 2000/04/09 14:00 EDT
1939    Tag: dbm-20000502-Version_110_28
1940    Description:
1941    
1942    1. Updated src/compiler/TopLevel/main/version.sml to version 110.28
1943    
1944    2. Updated config/version to 110.28
1945    
1946    3. Updated config/srcarchiveurl
1947    
1948    3. New boot files!
1949       ftp://ftp.research.bell-labs.com/dist/smlnj/working/110.28/
1950    
1951  ----------------------------------------------------------------------  ----------------------------------------------------------------------
1952  Name: Matthias Blume  Name: Matthias Blume
1953  Date: 2000/05/01 19:05:00 JST  Date: 2000/05/01 19:05:00 JST
# Line 310  Line 2247 
2247    
2248  3.  Assembly  3.  Assembly
2249    
2250      When generating assemby, resolve the value of client defined constants,      When generating assembly, resolve the value of client defined constants,
2251      instead of generating symbolic values.  This is controlled by the      instead of generating symbolic values.  This is controlled by the
2252      new flag "asm-resolve-constants", which is default to true.      new flag "asm-resolve-constants", which is default to true.
2253    
# Line 333  Line 2270 
2270    
2271  To this end, I arranged that instead of "structure Core" as "structure  To this end, I arranged that instead of "structure Core" as "structure
2272  _Core" is bound in the pervasive environment.  Core access is done via  _Core" is bound in the pervasive environment.  Core access is done via
2273  _Core (which can never be accidentially rebound because _Core is not a  _Core (which can never be accidentally rebound because _Core is not a
2274  legal surface-syntax symbol).  legal surface-syntax symbol).
2275    
2276  The current solution is much cleaner because the core environment is  The current solution is much cleaner because the core environment is
# Line 343  Line 2280 
2280  with dynamic and symbolic parts of the core environment.  with dynamic and symbolic parts of the core environment.
2281    
2282  Remaining hackery (to bind the "magic" symbol _Core) is localized in the  Remaining hackery (to bind the "magic" symbol _Core) is localized in the
2283  compilation mananger's bootstrap compiler (actually: in the "init group"  compilation manager's bootstrap compiler (actually: in the "init group"
2284  handling).  See the comments in src/system/smlnj/init/init.cmi for  handling).  See the comments in src/system/smlnj/init/init.cmi for
2285  more details.  more details.
2286    
# Line 458  Line 2395 
2395     (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
2396     used).     used).
2397    
2398     This was done to accomodate the new "make" and "shell" tools which     This was done to accommodate the new "make" and "shell" tools which
2399     facilitate fairly seemless hookup to portions of code managed using     facilitate fairly seamless hookup to portions of code managed using
2400     Makefiles or Shell scripts.     Makefiles or Shell scripts.
2401    
2402     There are no classes "shared" or "private" anymore.  Instead, the     There are no classes "shared" or "private" anymore.  Instead, the
# Line 471  Line 2408 
2408    
2409     All existing tools are described in the CM manual.     All existing tools are described in the CM manual.
2410    
2411     - Slightly better error handling.  (CM now surpresses many followup     - Slightly better error handling.  (CM now suppresses many followup
2412     error messages that tended to be more annoying than helpful.)     error messages that tended to be more annoying than helpful.)
2413    
2414  2. Major changes to the compiler's static environment data structures.  2. Major changes to the compiler's static environment data structures.
# Line 605  Line 2542 
2542    
2543       I've changed andl to testl in the floating point test sequence       I've changed andl to testl in the floating point test sequence
2544       whenever appropriate.  The Intel optimization guide states that       whenever appropriate.  The Intel optimization guide states that
2545       testl is perferable to andl.       testl is preferable to andl.
2546    
2547  7. RA (x86 only)  7. RA (x86 only)
2548    
# Line 787  Line 2724 
2724    
2725  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an  1. Tools.registerStdShellCmdTool (from smlnj/cm/tool.cm) takes an
2726  additional argument called "template" which is an optional string that  additional argument called "template" which is an optional string that
2727  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
2728  explanation.  explanation.
2729    
2730  2. A special-purpose tool can be "regisitered" by simply dropping the  2. A special-purpose tool can be "registered" by simply dropping the
2731  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same  corresponding <...>-tool.cm (and/or <...>-ext.cm) into the same
2732  directory where the .cm file lives that uses this tool.  (The  directory where the .cm file lives that uses this tool.  (The
2733  behavior/misfeature until now was to look for the tool description  behavior/misfeature until now was to look for the tool description
# Line 834  Line 2771 
2771  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
2772  <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,
2773  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
2774  perhaps got accidentially killed).  In this case, fixpt will quickly  perhaps got accidentally killed).  In this case, fixpt will quickly
2775  move through what exists before continuing where it left off earlier,  move through what exists before continuing where it left off earlier,
2776  and, thus, saves a lot of time.  and, thus, saves a lot of time.
2777    
# Line 884  Line 2821 
2821    it from that remote directory.    it from that remote directory.
2822    This should simplify installation further:  For machines that have    This should simplify installation further:  For machines that have
2823    access to the internet, just fetch <version>-config.tgz, unpack it,    access to the internet, just fetch <version>-config.tgz, unpack it,
2824    edit config/targets, and go (run config/install.sh).  The scipt will    edit config/targets, and go (run config/install.sh).  The script will
2825    fetch everything else that it might need all by itself.    fetch everything else that it might need all by itself.
2826    
2827    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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